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name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> <input id="query" name="query" type="text" value="Rao, R"> <ul id="abstracts"><li><input checked id="abstracts-0" name="abstracts" type="radio" value="show"> <label for="abstracts-0">Show abstracts</label></li><li><input id="abstracts-1" name="abstracts" type="radio" value="hide"> <label for="abstracts-1">Hide abstracts</label></li></ul> </div> <div class="box field is-grouped is-grouped-multiline level-item"> <div class="control"> <span class="select is-small"> <select id="size" name="size"><option value="25">25</option><option selected value="50">50</option><option value="100">100</option><option value="200">200</option></select> </span> <label for="size">results per page</label>. </div> <div class="control"> <label for="order">Sort results by</label> <span class="select is-small"> <select id="order" name="order"><option selected value="-announced_date_first">Announcement date (newest first)</option><option value="announced_date_first">Announcement date (oldest first)</option><option value="-submitted_date">Submission date (newest first)</option><option value="submitted_date">Submission date (oldest first)</option><option value="">Relevance</option></select> </span> </div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.00285">arXiv:2411.00285</a> <span> [<a href="https://arxiv.org/pdf/2411.00285">pdf</a>, <a href="https://arxiv.org/ps/2411.00285">ps</a>, <a href="https://arxiv.org/format/2411.00285">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> </div> <p class="title is-5 mathjax"> A Kinetic Scheme Based On Positivity Preservation For Multi-component Euler Equations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Roy%2C+S+S">Shashi Shekhar Roy</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2411.00285v1-abstract-short" style="display: inline;"> In this paper, we describe a kinetic model based on flexible velocities for the multi-component Euler equations. Our kinetic model comprises of two velocities in 1D and three velocities in 2D. The velocities in 2D are aligned to the cell-interface such that the resulting macroscopic normal flux is locally one-dimensional. The magnitude of these velocities is set to satisfy positivity preservation… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.00285v1-abstract-full').style.display = 'inline'; document.getElementById('2411.00285v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.00285v1-abstract-full" style="display: none;"> In this paper, we describe a kinetic model based on flexible velocities for the multi-component Euler equations. Our kinetic model comprises of two velocities in 1D and three velocities in 2D. The velocities in 2D are aligned to the cell-interface such that the resulting macroscopic normal flux is locally one-dimensional. The magnitude of these velocities is set to satisfy positivity preservation conditions for first order accuracy, under a CFL-like limiting condition on the time step. However, at a stationary contact discontinuity, the definition of the velocities is modified to ensure an exact capture. The basic numerical scheme is extended to third order accuracy using a Chakravarthy-Osher type flux limited approach along with Strong Stability Preserving Runge-Kutta (SSPRK) method. Some benchmark 1D and 2D test cases are solved, including shock-bubble interaction test cases, to demonstrate the efficiency of the proposed solver. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.00285v1-abstract-full').style.display = 'none'; document.getElementById('2411.00285v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">arXiv admin note: text overlap with arXiv:2403.14794</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.11934">arXiv:2405.11934</a> <span> [<a href="https://arxiv.org/pdf/2405.11934">pdf</a>, <a href="https://arxiv.org/format/2405.11934">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.jpclett.4c00215">10.1021/acs.jpclett.4c00215 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Elucidating the role of electron transfer in the photoluminescence of $\mathrm{MoS_{2}}$ quantum dots synthesized by fs-pulse ablation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sahoo%2C+A">Anubhab Sahoo</a>, <a href="/search/physics?searchtype=author&query=Dixit%2C+T">Tejendra Dixit</a>, <a href="/search/physics?searchtype=author&query=Kumar%2C+K+V+A">K. V. Anil Kumar</a>, <a href="/search/physics?searchtype=author&query=Ganapathi%2C+K+L">K. Lakshmi Ganapathi</a>, <a href="/search/physics?searchtype=author&query=Nayak%2C+P+K">Pramoda K. Nayak</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+M+S+R">M. S. Ramachandra Rao</a>, <a href="/search/physics?searchtype=author&query=Krishnan%2C+S">Sivarama Krishnan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.11934v1-abstract-short" style="display: inline;"> Herein, $\mathrm{MoS_{2}}$ quantum dot (QDs) with controlled optical, structural, and electronic properties are synthesized using the femtosecond pulsed laser ablation in liquid (fs-PLAL) technique by varying pulse-width, ablation power, and ablation time to harness the potential for next-generation optoelectronics and quantum technology. Furthermore, this work elucidates key aspects of the mechan… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.11934v1-abstract-full').style.display = 'inline'; document.getElementById('2405.11934v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.11934v1-abstract-full" style="display: none;"> Herein, $\mathrm{MoS_{2}}$ quantum dot (QDs) with controlled optical, structural, and electronic properties are synthesized using the femtosecond pulsed laser ablation in liquid (fs-PLAL) technique by varying pulse-width, ablation power, and ablation time to harness the potential for next-generation optoelectronics and quantum technology. Furthermore, this work elucidates key aspects of the mechanisms underlying the near-UV and blue emission, the accompanying large Stokes-shift, and the consequent change in sample color with laser exposure parameters pertaining to $\mathrm{MoS_{2}}$ QDs. Through spectroscopic analysis, including UV-visible absorption, photoluminescence, and Raman spectroscopy, we successfully unravelled the mechanisms for the change in optoelectronic properties of $\mathrm{MoS_{2}}$ QDs with laser parameters. We realize that the occurrence of a secondary phase, specifically $\mathrm{MoO_{3-x}}$, is responsible for the significant Stokes-shift and blue emission observed in this QDs system. The primary factor influencing these activities is the electron transfer observed between these two phases, as validated by excitation dependent photoluminescence, XPS and Raman spectroscopies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.11934v1-abstract-full').style.display = 'none'; document.getElementById('2405.11934v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.10715">arXiv:2405.10715</a> <span> [<a href="https://arxiv.org/pdf/2405.10715">pdf</a>, <a href="https://arxiv.org/format/2405.10715">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Functionalized mm-scale vapor cells for alkali-metal spectroscopy and magnetometry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raghavan%2C+H">Harini Raghavan</a>, <a href="/search/physics?searchtype=author&query=Tayler%2C+M+C+D">Michael C. D. Tayler</a>, <a href="/search/physics?searchtype=author&query=Mouloudakis%2C+K">Kostas Mouloudakis</a>, <a href="/search/physics?searchtype=author&query=Rae%2C+R">Rachel Rae</a>, <a href="/search/physics?searchtype=author&query=L%C3%A4hteenm%C3%A4ki%2C+S">Sami L盲hteenm盲ki</a>, <a href="/search/physics?searchtype=author&query=Zetter%2C+R">Rasmus Zetter</a>, <a href="/search/physics?searchtype=author&query=Laine%2C+P">Petteri Laine</a>, <a href="/search/physics?searchtype=author&query=Haesler%2C+J">Jacques Haesler</a>, <a href="/search/physics?searchtype=author&query=Balet%2C+L">Laurent Balet</a>, <a href="/search/physics?searchtype=author&query=Overstolz%2C+T">Thomas Overstolz</a>, <a href="/search/physics?searchtype=author&query=Karlen%2C+S">Sylvain Karlen</a>, <a href="/search/physics?searchtype=author&query=Mitchell%2C+M+W">Morgan W. Mitchell</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.10715v3-abstract-short" style="display: inline;"> We describe micro-fabricated rubidium vapor cells with integrated temperature-control functionality and demonstrate their suitability for use in miniaturized ultra-sensitive magnetometers. These functionalized vapor cells (FVCs) embody a dual-chamber design in low-conductivity silicon with anti-permeation coatings and micro-structured thin-film platinum surface traces as resistive heaters and temp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.10715v3-abstract-full').style.display = 'inline'; document.getElementById('2405.10715v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.10715v3-abstract-full" style="display: none;"> We describe micro-fabricated rubidium vapor cells with integrated temperature-control functionality and demonstrate their suitability for use in miniaturized ultra-sensitive magnetometers. These functionalized vapor cells (FVCs) embody a dual-chamber design in low-conductivity silicon with anti-permeation coatings and micro-structured thin-film platinum surface traces as resistive heaters and temperature sensors. Thermal tests show our ability to control alkali metal distribution within the FVCs, ensuring a clean sensing chamber for optical measurements. Optical absorption spectroscopy is used to correlate the temperature readings with vapor density and to measure buffer gas pressure, of interest for optimizing sensitivity. Finally, we demonstrate zero-field resonance magnetometry with 18 fT/Hz$^{1/2}$ sensitivity in the 10 Hz to 100 Hz band, limited by laser noise and magnetic shield noise, which indicates that the functionalization does not introduce significant magnetic noise. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.10715v3-abstract-full').style.display = 'none'; document.getElementById('2405.10715v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Authors HR and MCDT contributed equally</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.08782">arXiv:2404.08782</a> <span> [<a href="https://arxiv.org/pdf/2404.08782">pdf</a>, <a href="https://arxiv.org/format/2404.08782">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.110.245111">10.1103/PhysRevB.110.245111 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Phase transitions of correlated systems from graph neural networks with quantum embedding techniques </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">Rishi Rao</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+L">Li Zhu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.08782v3-abstract-short" style="display: inline;"> Correlated systems represent a class of materials that are difficult to describe through traditional electronic structure methods. The computational demand to simulate the structural dynamics of such systems, with correlation effects considered, is substantial. Here, we investigate the structural dynamics of $f$- and $d$-electron correlated systems by integrating quantum embedding techniques with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08782v3-abstract-full').style.display = 'inline'; document.getElementById('2404.08782v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.08782v3-abstract-full" style="display: none;"> Correlated systems represent a class of materials that are difficult to describe through traditional electronic structure methods. The computational demand to simulate the structural dynamics of such systems, with correlation effects considered, is substantial. Here, we investigate the structural dynamics of $f$- and $d$-electron correlated systems by integrating quantum embedding techniques with interatomic potentials derived from graph neural networks. For Cerium, a prototypical correlated $f$-electron system, we use Density Functional Theory with the Gutzwiller approximation to generate training data due to efficiency with which correlations effects are included for large multi-orbital systems. For Nickel Oxide, a prototypical correlated $d$-electron system, advancements in computational capabilities now permit the use of full Dynamical Mean Field Theory to obtain energies and forces. We train neural networks on this data to create a model of the potential energy surface, enabling rapid and effective exploration of structural dynamics. Utilizing these potentials, we delineate transition pathways between the $伪$, $伪'$, and $伪''$ phases of Cerium and predict the melting curve of Nickel Oxide. Our results demonstrate the potential of machine learning potentials to accelerate the study of strongly correlated systems, offering a scalable approach to explore and understand the complex physics governing these materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08782v3-abstract-full').style.display = 'none'; document.getElementById('2404.08782v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.14794">arXiv:2403.14794</a> <span> [<a href="https://arxiv.org/pdf/2403.14794">pdf</a>, <a href="https://arxiv.org/ps/2403.14794">ps</a>, <a href="https://arxiv.org/format/2403.14794">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> </div> <p class="title is-5 mathjax"> A Kinetic Scheme based on Positivity Preservation with Exact Shock Capture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Roy%2C+S+S">Shashi Shekhar Roy</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.14794v1-abstract-short" style="display: inline;"> In this paper, we describe a kinetic model with flexible velocities which are set to satisfy positivity preservation conditions for the Euler equations. Our kinetic model in 1D comprises of two velocities, and both the asymmetrical and the symmetrical models are utilized. Switching between the two models is done based on our own version of kinetic relative entropy and an additional criterion, to e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.14794v1-abstract-full').style.display = 'inline'; document.getElementById('2403.14794v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.14794v1-abstract-full" style="display: none;"> In this paper, we describe a kinetic model with flexible velocities which are set to satisfy positivity preservation conditions for the Euler equations. Our kinetic model in 1D comprises of two velocities, and both the asymmetrical and the symmetrical models are utilized. Switching between the two models is done based on our own version of kinetic relative entropy and an additional criterion, to ensure an accurate, entropic and robust scheme. In 2D, we describe a novel three-velocity kinetic model, defined to ensure a locally 1D formulation for the resulting macroscopic normal flux. For first order accuracy, we also obtain a limit on the time step which ensures positivity preservation. The resulting numerical scheme captures grid-aligned steady shocks exactly. Several benchmark compressible flow test cases are solved in 1D and 2D to demonstrate the efficacy of the proposed solver. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.14794v1-abstract-full').style.display = 'none'; document.getElementById('2403.14794v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.05104">arXiv:2311.05104</a> <span> [<a href="https://arxiv.org/pdf/2311.05104">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Impact of thermal annealing on the interaction between monolayer MoS2 and Au </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lough%2C+S">Stephanie Lough</a>, <a href="/search/physics?searchtype=author&query=Thompson%2C+J+E">Jesse E. Thompson</a>, <a href="/search/physics?searchtype=author&query=Smalley%2C+D">Darian Smalley</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Rahul Rao</a>, <a href="/search/physics?searchtype=author&query=Ishigami%2C+M">Masahiro Ishigami</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.05104v1-abstract-short" style="display: inline;"> We have investigated the impact of thermal annealing on the interaction of single layer MoS2 and Au using Raman Spectroscopy. We found MoS2 has two main modes of interactions with the underlying Au being either weakly-coupled or strongly-coupled. The regions strongly-coupled to Au are hybridized to Au, minimally strained, and electron-doped. The weakly-coupled regions are found to be slightly hole… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05104v1-abstract-full').style.display = 'inline'; document.getElementById('2311.05104v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.05104v1-abstract-full" style="display: none;"> We have investigated the impact of thermal annealing on the interaction of single layer MoS2 and Au using Raman Spectroscopy. We found MoS2 has two main modes of interactions with the underlying Au being either weakly-coupled or strongly-coupled. The regions strongly-coupled to Au are hybridized to Au, minimally strained, and electron-doped. The weakly-coupled regions are found to be slightly hole-doped with tensile strain of 1.0 %. The observed nanoscale inhomogeneities in doping would result in Au contacts having a large variability in performance. The overall areal coverage of the strongly-coupled regions is not increased by thermal annealing, and the variability in the degree of hybridization increases at annealing temperatures above 100 掳C. Our data also show that monolayer MoS2 starts to decouple from Au around 100 掳C, becoming fully decoupled above 250 掳C, suggesting that monolayer MoS2 produced by Au-assisted mechanical exfoliation may be more easily transferred off Au at elevated temperatures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05104v1-abstract-full').style.display = 'none'; document.getElementById('2311.05104v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.06806">arXiv:2306.06806</a> <span> [<a href="https://arxiv.org/pdf/2306.06806">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Raman spectroscopy study of pressure-induced phase transitions in single crystal CuInP2S6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">R. Rao</a>, <a href="/search/physics?searchtype=author&query=Conner%2C+B+S">B. S. Conner</a>, <a href="/search/physics?searchtype=author&query=Jiang%2C+J">J. Jiang</a>, <a href="/search/physics?searchtype=author&query=Pachter%2C+R">R. Pachter</a>, <a href="/search/physics?searchtype=author&query=Susner%2C+M+A">M. A. Susner</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.06806v2-abstract-short" style="display: inline;"> Two dimensional ferroic materials exhibit a variety of functional properties that can be tuned by temperature and pressure. CuInP2S6 is a layered material that is ferrielectric at room temperature and whose properties are a result of the unique structural arrangement of ordered Cu and In cations within a P2S6 anion backbone. Here, we investigate the effect of hydrostatic pressure on the structure… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.06806v2-abstract-full').style.display = 'inline'; document.getElementById('2306.06806v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.06806v2-abstract-full" style="display: none;"> Two dimensional ferroic materials exhibit a variety of functional properties that can be tuned by temperature and pressure. CuInP2S6 is a layered material that is ferrielectric at room temperature and whose properties are a result of the unique structural arrangement of ordered Cu and In cations within a P2S6 anion backbone. Here, we investigate the effect of hydrostatic pressure on the structure of CuInP2S6 single crystals through a detailed Raman spectroscopy study. Analysis of the peak frequencies, intensities and widths reveals four high pressure regimes. At 5 GPa the material undergoes a monoclinic-trigonal phase transition. At higher pressures (5 - 12 GPa) we see Raman peak sharpening, indicative of a change in the electronic structure, followed by an incommensurate phase between 12 - 17 GPa. Above 17 GPa we see evidence for metallization in the material. The original state of the material is fully recovered upon decompression, showing that hydrostatic pressure could be used to tune the electronic and ferrielectric properties of CuInP2S6. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.06806v2-abstract-full').style.display = 'none'; document.getElementById('2306.06806v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.02520">arXiv:2304.02520</a> <span> [<a href="https://arxiv.org/pdf/2304.02520">pdf</a>, <a href="https://arxiv.org/ps/2304.02520">ps</a>, <a href="https://arxiv.org/format/2304.02520">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.compfluid.2023.106016">10.1016/j.compfluid.2023.106016 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A kinetic scheme with variable velocities and relative entropy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Roy%2C+S+S">Shashi Shekhar Roy</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2304.02520v3-abstract-short" style="display: inline;"> A new kinetic model is proposed where the equilibrium distribution with bounded support has a range of velocities about two average velocities in 1D. In 2D, the equilibrium distribution function has a range of velocities about four average velocities, one in each quadrant. In the associated finite volume scheme, the average velocities are used to enforce the Rankine-Hugoniot jump conditions for th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.02520v3-abstract-full').style.display = 'inline'; document.getElementById('2304.02520v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.02520v3-abstract-full" style="display: none;"> A new kinetic model is proposed where the equilibrium distribution with bounded support has a range of velocities about two average velocities in 1D. In 2D, the equilibrium distribution function has a range of velocities about four average velocities, one in each quadrant. In the associated finite volume scheme, the average velocities are used to enforce the Rankine-Hugoniot jump conditions for the numerical diffusion at cell-interfaces, thereby capturing steady discontinuities exactly. The variable range of velocities is used to provide additional diffusion in smooth regions. Further, a novel kinetic theory based expression for relative entropy is presented which, along with an additional criterion, is used to identify expansions and smooth flow regions. Appropriate flow tangency and far-field boundary conditions are formulated for the proposed kinetic model. Several benchmark 1D and 2D compressible flow test cases are solved to demonstrate the efficacy of the proposed solver. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.02520v3-abstract-full').style.display = 'none'; document.getElementById('2304.02520v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.12394">arXiv:2302.12394</a> <span> [<a href="https://arxiv.org/pdf/2302.12394">pdf</a>, <a href="https://arxiv.org/format/2302.12394">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Atmospheric turbulence does not change the degree of polarization of vector beams </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tao%2C+Z">Zhiwei Tao</a>, <a href="/search/physics?searchtype=author&query=Abdukirim%2C+A">Azezigul Abdukirim</a>, <a href="/search/physics?searchtype=author&query=Dai%2C+C">Congming Dai</a>, <a href="/search/physics?searchtype=author&query=Wu%2C+P">Pengfei Wu</a>, <a href="/search/physics?searchtype=author&query=Mei%2C+H">Haiping Mei</a>, <a href="/search/physics?searchtype=author&query=Ren%2C+Y">Yichong Ren</a>, <a href="/search/physics?searchtype=author&query=Luo%2C+C">Chuankai Luo</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Ruizhong Rao</a>, <a href="/search/physics?searchtype=author&query=Wei%2C+H">Heli Wei</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.12394v1-abstract-short" style="display: inline;"> We propose a novel theoretical framework to demonstrate vector beams whose degree of polarization does not change on atmospheric propagation. Inspired by the Fresnel equations, we derive the reflective and refractive field of vector beams propagating through a phase screen by employing the continuity of electromagnetic field. We generalize the conventional split-step beam propagation method by con… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12394v1-abstract-full').style.display = 'inline'; document.getElementById('2302.12394v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.12394v1-abstract-full" style="display: none;"> We propose a novel theoretical framework to demonstrate vector beams whose degree of polarization does not change on atmospheric propagation. Inspired by the Fresnel equations, we derive the reflective and refractive field of vector beams propagating through a phase screen by employing the continuity of electromagnetic field. We generalize the conventional split-step beam propagation method by considering the vectorial properties in the vacuum diffraction and the refractive properties of a single phase screen. Based on this vectorial propagation model, we extensively calculate the change of degree of polarization (DOP) of vector beams under different beam parameters and turbulence parameters both in free-space and satellite-mediated links. Our result is that whatever in the free-space or satellite-mediated regime, the change of DOP mainly fluctuates around the order of $10^{-13}$ to $10^{-6}$, which is almost negligible. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12394v1-abstract-full').style.display = 'none'; document.getElementById('2302.12394v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.06187">arXiv:2209.06187</a> <span> [<a href="https://arxiv.org/pdf/2209.06187">pdf</a>, <a href="https://arxiv.org/format/2209.06187">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> </div> </div> <p class="title is-5 mathjax"> Simulation of emergency evacuation of passengers with and without disability at different types of metro stations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mandal%2C+T">Tarapada Mandal</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+K+R">K. Ramachandra Rao</a>, <a href="/search/physics?searchtype=author&query=Tiwari%2C+G">Geetam Tiwari</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2209.06187v1-abstract-short" style="display: inline;"> Metro systems are part of major transportation systems for big cities. Evacuation is a key challenge for metro systems in case of fire or terrorist attacks. In case of evacuation, wheelchair-assisted evacuees might take a longer time. In order to understand the effect of assisted and non-assisted evacuees on evacuation, a simulation is conducted in this study. Platform evacuation and train evacuat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.06187v1-abstract-full').style.display = 'inline'; document.getElementById('2209.06187v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.06187v1-abstract-full" style="display: none;"> Metro systems are part of major transportation systems for big cities. Evacuation is a key challenge for metro systems in case of fire or terrorist attacks. In case of evacuation, wheelchair-assisted evacuees might take a longer time. In order to understand the effect of assisted and non-assisted evacuees on evacuation, a simulation is conducted in this study. Platform evacuation and train evacuation simulation are done. A train load survey is conducted to understand the number of evacuees inside a train. Two different layouts of stations are considered, underground island-type platforms and elevated platforms. Simulation of wheelchair-assisted and non-assisted evacuees is done. Design of experiment is used to create full factorial and fractional factorial designs to take input of different factors in simulation. The main factors affecting the total evacuation time are calculated using the design of experiment. It is found that wheelchair-assisted evacuees take longer time than non-assisted evacuees in both underground and elevated station platforms. It is also found that efforts are needed to increase the speed of the non-assisted evacuees also. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.06187v1-abstract-full').style.display = 'none'; document.getElementById('2209.06187v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.00559">arXiv:2207.00559</a> <span> [<a href="https://arxiv.org/pdf/2207.00559">pdf</a>, <a href="https://arxiv.org/format/2207.00559">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">stat.ML</span> </div> </div> <p class="title is-5 mathjax"> Ultra-low latency recurrent neural network inference on FPGAs for physics applications with hls4ml </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Khoda%2C+E+E">Elham E Khoda</a>, <a href="/search/physics?searchtype=author&query=Rankin%2C+D">Dylan Rankin</a>, <a href="/search/physics?searchtype=author&query=de+Lima%2C+R+T">Rafael Teixeira de Lima</a>, <a href="/search/physics?searchtype=author&query=Harris%2C+P">Philip Harris</a>, <a href="/search/physics?searchtype=author&query=Hauck%2C+S">Scott Hauck</a>, <a href="/search/physics?searchtype=author&query=Hsu%2C+S">Shih-Chieh Hsu</a>, <a href="/search/physics?searchtype=author&query=Kagan%2C+M">Michael Kagan</a>, <a href="/search/physics?searchtype=author&query=Loncar%2C+V">Vladimir Loncar</a>, <a href="/search/physics?searchtype=author&query=Paikara%2C+C">Chaitanya Paikara</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Richa Rao</a>, <a href="/search/physics?searchtype=author&query=Summers%2C+S">Sioni Summers</a>, <a href="/search/physics?searchtype=author&query=Vernieri%2C+C">Caterina Vernieri</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+A">Aaron Wang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.00559v1-abstract-short" style="display: inline;"> Recurrent neural networks have been shown to be effective architectures for many tasks in high energy physics, and thus have been widely adopted. Their use in low-latency environments has, however, been limited as a result of the difficulties of implementing recurrent architectures on field-programmable gate arrays (FPGAs). In this paper we present an implementation of two types of recurrent neura… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.00559v1-abstract-full').style.display = 'inline'; document.getElementById('2207.00559v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.00559v1-abstract-full" style="display: none;"> Recurrent neural networks have been shown to be effective architectures for many tasks in high energy physics, and thus have been widely adopted. Their use in low-latency environments has, however, been limited as a result of the difficulties of implementing recurrent architectures on field-programmable gate arrays (FPGAs). In this paper we present an implementation of two types of recurrent neural network layers -- long short-term memory and gated recurrent unit -- within the hls4ml framework. We demonstrate that our implementation is capable of producing effective designs for both small and large models, and can be customized to meet specific design requirements for inference latencies and FPGA resources. We show the performance and synthesized designs for multiple neural networks, many of which are trained specifically for jet identification tasks at the CERN Large Hadron Collider. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.00559v1-abstract-full').style.display = 'none'; document.getElementById('2207.00559v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 6 figures, 5 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.01316">arXiv:2202.01316</a> <span> [<a href="https://arxiv.org/pdf/2202.01316">pdf</a>, <a href="https://arxiv.org/format/2202.01316">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Molecular Networks">q-bio.MN</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/5.0091035">10.1063/5.0091035 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Free-Energy Transduction in Chemical Reaction Networks: from Enzymes to Metabolism </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wachtel%2C+A">Artur Wachtel</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Riccardo Rao</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+M">Massimiliano Esposito</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2202.01316v2-abstract-short" style="display: inline;"> We provide a rigorous definition of free-energy transduction and its efficiency in arbitrary -- linear or nonlinear -- open chemical reaction networks (CRNs) operating at steady state. Our method is based on the knowledge of the stoichiometric matrix and of the chemostatted species (i.e. the species maintained at constant concentration by the environment) to identify the fundamental currents and f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.01316v2-abstract-full').style.display = 'inline'; document.getElementById('2202.01316v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.01316v2-abstract-full" style="display: none;"> We provide a rigorous definition of free-energy transduction and its efficiency in arbitrary -- linear or nonlinear -- open chemical reaction networks (CRNs) operating at steady state. Our method is based on the knowledge of the stoichiometric matrix and of the chemostatted species (i.e. the species maintained at constant concentration by the environment) to identify the fundamental currents and forces contributing to the entropy production. Transduction occurs when the current of a stoichiometrically balanced process is driven against its spontaneous direction (set by its force) thanks to other processes flowing along their spontaneous direction. In these regimes, open CRNs operate as thermodynamic machines. After exemplifying these general ideas using toy models, we analyze central energy metabolism. We relate the fundamental currents to metabolic pathways and discuss the efficiency with which they are able to transduce free energy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.01316v2-abstract-full').style.display = 'none'; document.getElementById('2202.01316v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 17 figues, (v2: IV.A.3 & IV.C modified, VI expanded)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.02340">arXiv:2111.02340</a> <span> [<a href="https://arxiv.org/pdf/2111.02340">pdf</a>, <a href="https://arxiv.org/format/2111.02340">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.compfluid.2022.105702">10.1016/j.compfluid.2022.105702 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Kinetic Flux Difference Splitting Method for Compressible Flows </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=S%2C+S+K">Shrinath. K. S</a>, <a href="/search/physics?searchtype=author&query=H%2C+M+N">Maruthi. N. H</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+V+V">Veeredhi Vasudeva Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.02340v3-abstract-short" style="display: inline;"> A low diffusive flux difference splitting based kinetic scheme is developed based on a discrete velocity Boltzmann equation, with a novel three velocity model. While two discrete velocities are used for upwinding, the third discrete velocity is utilized to introduce appropriate additional numerical diffusion only in the expansion regions, identified using relative entropy (Kullback-Liebler diverge… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.02340v3-abstract-full').style.display = 'inline'; document.getElementById('2111.02340v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.02340v3-abstract-full" style="display: none;"> A low diffusive flux difference splitting based kinetic scheme is developed based on a discrete velocity Boltzmann equation, with a novel three velocity model. While two discrete velocities are used for upwinding, the third discrete velocity is utilized to introduce appropriate additional numerical diffusion only in the expansion regions, identified using relative entropy (Kullback-Liebler divergence) at the cell-interface, along with the estimation of physical entropy. This strategy provides an interesting alternative to entropy fix, which is typically needed for low diffusive schemes. Grid-aligned steady discontinuities are captured exactly by fixing the primary numerical diffusion such that flux equivalence leads to zero numerical diffusion across discontinuities. Results for bench-mark test problems are presented for inviscid and viscous compressible flows. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.02340v3-abstract-full').style.display = 'none'; document.getElementById('2111.02340v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Computers & Fluids Volume 250 , 15 January 2023, 105702 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.13497">arXiv:2108.13497</a> <span> [<a href="https://arxiv.org/pdf/2108.13497">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.104.235421">10.1103/PhysRevB.104.235421 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pressure-driven phase transformations and phase segregation in ferrielectric CuInP$_2$S$_6$-In$_{4/3}$P$_2$S$_6$ self-assembled heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">Rahul Rao</a>, <a href="/search/physics?searchtype=author&query=Conner%2C+B+S">Benjamin S. Conner</a>, <a href="/search/physics?searchtype=author&query=Selhorst%2C+R">Ryan Selhorst</a>, <a href="/search/physics?searchtype=author&query=Susner%2C+M+A">Michael A. Susner</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.13497v1-abstract-short" style="display: inline;"> Layered multi-ferroic materials exhibit a variety of functional properties that can be tuned by varying the temperature and pressure. As-synthesized CuInP$_2$S$_6$ is a layered material that displays ferrielectric behavior at room temperature. When synthesized with Cu deficiencies, CuInP$_2$S$_6$ spontaneously phase segregates to form ferrielectric CuInP$_2$S$_6$ (CIPS) and paraelectric In… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.13497v1-abstract-full').style.display = 'inline'; document.getElementById('2108.13497v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.13497v1-abstract-full" style="display: none;"> Layered multi-ferroic materials exhibit a variety of functional properties that can be tuned by varying the temperature and pressure. As-synthesized CuInP$_2$S$_6$ is a layered material that displays ferrielectric behavior at room temperature. When synthesized with Cu deficiencies, CuInP$_2$S$_6$ spontaneously phase segregates to form ferrielectric CuInP$_2$S$_6$ (CIPS) and paraelectric In$_{4/3}$P$_2$S$_6$ (IPS) domains in a two-dimensional self-assembled heterostructure. Here, we study the effect of hydrostatic pressure on the structure of Cu-deficient CuInP$_2$S$_6$ by Raman spectroscopy measurements up to 20 GPa. Detailed analysis of the frequencies, intensities, and linewidths of the Raman peaks reveals four discontinuities in the spectra around 2, 10, 13 and 17 GPa. At ~2 GPa, we observe a structural transition initiated by the diffusion of IPS domains, which culminates in a drastic reduction of the number of peaks around 10 GPa. We attribute this to a possible monoclinic-trigonal phase transition at 10 GPa. At higher pressures (~ 13 GPa), significant increases in peak intensities and sharpening of the Raman peaks suggest a bandgap-lowering and an isostructural electronic transition, with a possible onset of metallization at pressures above 17 GPa. When the pressure is released, the structure again phase-separates into two distinct chemical domains within the same single crystalline framework -- however, these domains are much smaller in size than the as-synthesized material resulting in suppression of ferroelectricity through nanoconfinement. Hydrostatic pressure can thus be used to tune the electronic and ferrielectric properties of Cu-deficient layered CuInP$_2$S$_6$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.13497v1-abstract-full').style.display = 'none'; document.getElementById('2108.13497v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 Figures, 1 Table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.01891">arXiv:2102.01891</a> <span> [<a href="https://arxiv.org/pdf/2102.01891">pdf</a>, <a href="https://arxiv.org/format/2102.01891">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1364/JOSAA.418947">10.1364/JOSAA.418947 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Physical meaning of the deviation scale under arbitrary turbulence strengths of optical orbital angular momentum </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tao%2C+Z">Zhiwei Tao</a>, <a href="/search/physics?searchtype=author&query=Ren%2C+Y">Yichong Ren</a>, <a href="/search/physics?searchtype=author&query=Abdukirim%2C+A">Azezigul Abdukirim</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+S">Shiwei Liu</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Ruizhong Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2102.01891v3-abstract-short" style="display: inline;"> The recently so-called deviation scale [C. M. Mabena et al., Phys. Rev. A 99, 013828 (2019)] bridges the connection between the result of the infinitesimal propagation equation (IPE) prediction and that of the single phase screen (SPS) approximation. Thanks to the multiple phase screen (MPS) approach, in this paper we elaborate the physical meaning of the deviation scale: the spatial accumulation… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.01891v3-abstract-full').style.display = 'inline'; document.getElementById('2102.01891v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.01891v3-abstract-full" style="display: none;"> The recently so-called deviation scale [C. M. Mabena et al., Phys. Rev. A 99, 013828 (2019)] bridges the connection between the result of the infinitesimal propagation equation (IPE) prediction and that of the single phase screen (SPS) approximation. Thanks to the multiple phase screen (MPS) approach, in this paper we elaborate the physical meaning of the deviation scale: the spatial accumulation of slight intensity modulation of incident orbital angular momentum (OAM) carrying beam splits the original vortex into multiple individual vortices with a topological charge (TC) of +1 and re-generates the vortex-antivortex pairs with a TC of +1 and with a TC of -1, leading to a significant deviation between these two different results only when the disruption of this compound effect on the phase distribution of the incident OAM-carrying beam becomes more significant. Other than that, we also show that the appearance of the deviation scale cannot be predicted only by the Rytov variance, which can be predicted through the vortex-splitting ratio of the received optical field alone or with the help of the normalized propagation distance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.01891v3-abstract-full').style.display = 'none'; document.getElementById('2102.01891v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 6 figures; This paper aims to give a suitable physical interpretation for the recently so-called deviation scale [C. M. Mabena et al., Phys. Rev. A 99, 013828 (2019)]</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Opt. Soc. Am. A 38, 1120-1129 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.02907">arXiv:2101.02907</a> <span> [<a href="https://arxiv.org/pdf/2101.02907">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Comparison of the electrochemical performance of CeO2 and rare earth-based mixed metallic oxide (Ce0.9Zr0.1O2) for supercapacitor applications </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ghosh%2C+S">Sourav Ghosh</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+G+R">G. Ranga Rao</a>, <a href="/search/physics?searchtype=author&query=Thomas%2C+T">Tiju Thomas</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2101.02907v1-abstract-short" style="display: inline;"> CeO2 and Ce0.9Zr0.1O2 are prepared from the sol-gel method to investigate and compare their electrochemical properties for supercapacitor applications. Structural, morphological, and elemental studies have been done for CeO2 and Ce0.9Zr0.1O2 by XRD, SEM, and EDX. Cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques are used to study the electroc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.02907v1-abstract-full').style.display = 'inline'; document.getElementById('2101.02907v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.02907v1-abstract-full" style="display: none;"> CeO2 and Ce0.9Zr0.1O2 are prepared from the sol-gel method to investigate and compare their electrochemical properties for supercapacitor applications. Structural, morphological, and elemental studies have been done for CeO2 and Ce0.9Zr0.1O2 by XRD, SEM, and EDX. Cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques are used to study the electrochemical performance of these materials. Doping enhances the electrochemical performance of the electrode, by improving the specific capacitance (~150%, 243 F g-1 from 96 F g-1) for the doped system @2 mV s-1 Vs. Ag/AgCl reference electrode in 2 mol L-1 KOH electrolyte solution. Ce0.9Zr0.1O2 shows only ~30% of capacitance degradation for a ten folds increase in current densities. Ce0.9Zr0.1O2 also shows 16% capacitance degradation after 800 cycles with excellent Columbic efficiency (~100%) @2 A g-1 current density. Partial replacement of Ce4+ ion (0.97 脜) with Zr4+ ion (0.84 脜) results in a decrease in lattice parameter, as confirmed by Rietveld refinement. Ce0.9Zr0.1O2 has provided good energy, and power density of 1.128 Wh kg-1and 112.5 W kg-1 respectively. Furthermore, better diffusivity of the Ce0.9Zr0.1O2 in KOH electrolyte (indicated using Randles-Sevcik equation-based analysis) is correlated with better electrochemical performance. These insights presented here clearly indicate that Zr doping into CeO2 results in a promising candidate material for electrochemical and supercapacitive applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.02907v1-abstract-full').style.display = 'none'; document.getElementById('2101.02907v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 7 figures, presented in International Conference on Advanced Materials, Energy and Environmental Sustainability (ICAMEES-2018)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.07629">arXiv:2009.07629</a> <span> [<a href="https://arxiv.org/pdf/2009.07629">pdf</a>, <a href="https://arxiv.org/format/2009.07629">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Numerical Analysis">math.NA</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> Central algorithms for accurately predicting non classical non-linear waves in Dense Gases over simple geometries </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kolluru%2C+R">Ramesh Kolluru</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a>, <a href="/search/physics?searchtype=author&query=Sekhar%2C+G+N">G. N. Sekhar</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2009.07629v2-abstract-short" style="display: inline;"> Non-classical non-linear waves exist in dense gases for large specific heats at pressures and temperatures of the order of critical point values. These waves behave precisely opposite to the classical non-linear waves, with inverted classical waves like the expansion shocks which do not violate entropy conditions. More complex equation of state (EOS) other than the ideal or perfect EOS is typicall… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.07629v2-abstract-full').style.display = 'inline'; document.getElementById('2009.07629v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.07629v2-abstract-full" style="display: none;"> Non-classical non-linear waves exist in dense gases for large specific heats at pressures and temperatures of the order of critical point values. These waves behave precisely opposite to the classical non-linear waves, with inverted classical waves like the expansion shocks which do not violate entropy conditions. More complex equation of state (EOS) other than the ideal or perfect EOS is typically used in describing dense gases. Algorithm development with non-ideal/real gas EOS and application to dense gasses is gaining importance from a numerical perspective. Extending the algorithms designed for perfect gas EOS to dense gas flows with arbitrary real gas EOS is non-trivial. Most of the algorithms designed for prefect gas EOS are modified significantly when applied to real gas EOS. These algorithms can become complicated and some times impossible based on the EOS under consideration. The objective of the present work is to develop central solvers with smart diffusion capabilities independent of the eigenstructure and extendable to any arbitrary EOS. Euler equations with van der Waals EOS along with two newly developed algorithms, Method of Optimal Viscosity for Enhanced resolution of shocks (MOVERS+) and Riemann Invariants based Contact capturing Algorithm (RICCA), are used to simulate dense gasses over simple geometries. Various One Dimensional (1D) and Two Dimensional (2D) benchmark test cases are validated using these algorithms, and the results are compared with the those obtained from the literature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.07629v2-abstract-full').style.display = 'none'; document.getElementById('2009.07629v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">29 pages. arXiv admin note: text overlap with arXiv:2003.10695</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.10117">arXiv:2006.10117</a> <span> [<a href="https://arxiv.org/pdf/2006.10117">pdf</a>, <a href="https://arxiv.org/format/2006.10117">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevE.102.013310">10.1103/PhysRevE.102.013310 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Heterogeneous partition of cellular blood-borne nanoparticles through microvascular bifurcations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Liu%2C+Z+L">Zixiang L. Liu</a>, <a href="/search/physics?searchtype=author&query=Clausen%2C+J+R">Jonathan R. Clausen</a>, <a href="/search/physics?searchtype=author&query=Wagner%2C+J+L">Justin L. Wagner</a>, <a href="/search/physics?searchtype=author&query=Butler%2C+K+S">Kimberly S. Butler</a>, <a href="/search/physics?searchtype=author&query=Bolintineanu%2C+D+S">Dan S. Bolintineanu</a>, <a href="/search/physics?searchtype=author&query=Lechman%2C+J+B">Jeremy B. Lechman</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R+R">Rekha R. Rao</a>, <a href="/search/physics?searchtype=author&query=Aidun%2C+C+K">Cyrus K. Aidun</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.10117v1-abstract-short" style="display: inline;"> Blood flowing through microvascular bifurcations has been an active research topic for many decades, while the partitioning pattern of nanoscale solutes in the blood remains relatively unexplored. Here, we demonstrate a multiscale computational framework for direct numerical simulation of the nanoparticle (NP) partitioning through physiologically-relevant vascular bifurcations in the presence of r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.10117v1-abstract-full').style.display = 'inline'; document.getElementById('2006.10117v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.10117v1-abstract-full" style="display: none;"> Blood flowing through microvascular bifurcations has been an active research topic for many decades, while the partitioning pattern of nanoscale solutes in the blood remains relatively unexplored. Here, we demonstrate a multiscale computational framework for direct numerical simulation of the nanoparticle (NP) partitioning through physiologically-relevant vascular bifurcations in the presence of red blood cells (RBCs). The computational framework is established by embedding a newly-developed particulate suspension inflow/outflow boundary condition into a multiscale blood flow solver. The computational framework is verified by recovering a tubular blood flow without a bifurcation and validated against the experimental measurement of an intravital bifurcation flow. The classic Zweifach-Fung (ZF) effect is shown to be well captured by the method. Moreover, we observe that NPs exhibit a ZF-like heterogeneous partition in response to the heterogeneous partition of the RBC phase. The NP partitioning prioritizes the high-flow-rate daughter branch except for extreme (large or small) suspension flow partition ratios under which the complete phase separation tends to occur. By analyzing the flow field and the particle trajectories, we show that the ZF-like heterogeneity in NP partition can be explained by the RBC-entrainment effect caused by the deviation of the flow separatrix preceded by the tank-treading of RBCs near the bifurcation junction. The recovery of homogeneity in the NP partition under extreme flow partition ratios is due to the plasma skimming of NPs in the cell-free layer. These findings, based on the multiscale computational framework, provide biophysical insights to the heterogeneous distribution of NPs in microvascular beds that are observed pathophysiologically. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.10117v1-abstract-full').style.display = 'none'; document.getElementById('2006.10117v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. E 102, 013310 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.01389">arXiv:2006.01389</a> <span> [<a href="https://arxiv.org/pdf/2006.01389">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> </div> </div> <p class="title is-5 mathjax"> Photonics probing of DNA specific spatial mass density fluctuations in gut cell nuclei due to total body irradiation via confocal imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Hasan%2C+M">Mehedi Hasan</a>, <a href="/search/physics?searchtype=author&query=Shukla%2C+P">Pradeep Shukla</a>, <a href="/search/physics?searchtype=author&query=Nanda%2C+S">Shirsendu Nanda</a>, <a href="/search/physics?searchtype=author&query=Adhikari%2C+P">Prakash Adhikari</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Radhakrishna Rao</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+P">Prabhakar Pradhan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.01389v1-abstract-short" style="display: inline;"> Abnormalities within cells result in nanoscale structural alterations can be characterized via confocal imaging and quantification of these alterations. Accidental or deliberate exposure to total body irradiation (TBI) have adverse effects on the nuclear DNAs of cells. Here, we study the DNA molecular mass density spatial structural alterations of chromatin in cell nuclei of gut tissues caused by… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.01389v1-abstract-full').style.display = 'inline'; document.getElementById('2006.01389v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.01389v1-abstract-full" style="display: none;"> Abnormalities within cells result in nanoscale structural alterations can be characterized via confocal imaging and quantification of these alterations. Accidental or deliberate exposure to total body irradiation (TBI) have adverse effects on the nuclear DNAs of cells. Here, we study the DNA molecular mass density spatial structural alterations of chromatin in cell nuclei of gut tissues caused by the exposure to standard doses of 4Gy TBI, using the light localization technique called inverse participation ratio (IPR) in confocal images. Results indicate radiation suppresses DNA spatial mass density fluctuations. And hence, reduction and saturation in DNA density fluctuations are observed for different durations of post-irradiation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.01389v1-abstract-full').style.display = 'none'; document.getElementById('2006.01389v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 2 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.00800">arXiv:2004.00800</a> <span> [<a href="https://arxiv.org/pdf/2004.00800">pdf</a>, <a href="https://arxiv.org/format/2004.00800">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.102.125145">10.1103/PhysRevB.102.125145 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tunable and Enhanced Rashba Spin-Orbit Coupling in Iridate-Manganite Heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Suraj%2C+T+S">T. S. Suraj</a>, <a href="/search/physics?searchtype=author&query=Omar%2C+G+J">Ganesh Ji Omar</a>, <a href="/search/physics?searchtype=author&query=Jani%2C+H">Hariom Jani</a>, <a href="/search/physics?searchtype=author&query=Juvaid%2C+M+M">Muhammad Mangattuchali Juvaid</a>, <a href="/search/physics?searchtype=author&query=Hooda%2C+S">Sonu Hooda</a>, <a href="/search/physics?searchtype=author&query=Chaudhuri%2C+A">Anindita Chaudhuri</a>, <a href="/search/physics?searchtype=author&query=Rusydi%2C+A">Andrivo Rusydi</a>, <a href="/search/physics?searchtype=author&query=Sethupathi%2C+K">Kanikrishnan Sethupathi</a>, <a href="/search/physics?searchtype=author&query=Venkatesan%2C+T">Thirumalai Venkatesan</a>, <a href="/search/physics?searchtype=author&query=Ariando%2C+A">Ariando Ariando</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+M+S+R">Mamidanna Sri Ramachandra Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.00800v1-abstract-short" style="display: inline;"> Tailoring spin-orbit interactions and Coulomb repulsion are the key features to observe exotic physical phenomena such as magnetic anisotropy and topological spin texture at oxide interfaces. Our study proposes a novel platform for engineering the magnetism and spin-orbit coupling at LaMnO3/SrIrO3 (3d-5d oxide) interfaces by tuning the LaMnO3 growth conditions which controls the lattice displaceme… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.00800v1-abstract-full').style.display = 'inline'; document.getElementById('2004.00800v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.00800v1-abstract-full" style="display: none;"> Tailoring spin-orbit interactions and Coulomb repulsion are the key features to observe exotic physical phenomena such as magnetic anisotropy and topological spin texture at oxide interfaces. Our study proposes a novel platform for engineering the magnetism and spin-orbit coupling at LaMnO3/SrIrO3 (3d-5d oxide) interfaces by tuning the LaMnO3 growth conditions which controls the lattice displacement and spin-correlated interfacial coupling through charge transfer. We report on a tunable and enhanced interface-induced Rashba spin-orbit coupling and Elliot-Yafet spin relaxation mechanism in LaMnO3/SrIrO3 bilayer with change in the underlying magnetic order of LaMnO3. We also observed enhanced spin-orbit coupling strength in LaMnO3/SrIrO3 compared to previously reported SrIrO3 layers. The X-Ray spectroscopy measurement reveals the quantitative valence of Mn and their impact on charge transfer. Further, we performed angle-dependent magnetoresistance measurements, which show signatures of magnetic proximity effect in SrIrO3 while reflecting the magnetic order of LaMnO3. Our work thus demonstrates a new route to engineer the interface induced Rashba spin-orbit coupling and magnetic proximity effect in 3d-5d oxide interfaces which makes SrIrO3 an ideal candidate for spintronics applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.00800v1-abstract-full').style.display = 'none'; document.getElementById('2004.00800v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 Pages, 4 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 102, 125145 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.11777">arXiv:1912.11777</a> <span> [<a href="https://arxiv.org/pdf/1912.11777">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> </div> <p class="title is-5 mathjax"> Photonics study of probiotic treatment on brain cells exposed to chronic alcoholism using molecular specific nuclear light localization properties via confocal imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adhikari%2C+P">Prakash Adhikari</a>, <a href="/search/physics?searchtype=author&query=Shukla%2C+P+K">Pradeep K. Shukla</a>, <a href="/search/physics?searchtype=author&query=Hasan%2C+M">Mehedi Hasan</a>, <a href="/search/physics?searchtype=author&query=Alharthi%2C+F">Fatemah Alharthi</a>, <a href="/search/physics?searchtype=author&query=Regmi%2C+B">Binod Regmi</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Radhakrishna Rao</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+P">Prabhakar Pradhan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.11777v1-abstract-short" style="display: inline;"> Molecular specific photonics localization technique, the inverse participation ratio (IPR), is a powerful technique to probe the nanoscale structural alterations due to abnormalities or chronic alcoholism in brain cells using the confocal image. Chronic alcoholism is correlated with medical, behavioral, and psychological problems including brain cell damage. However, probiotics such as Lactobacill… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.11777v1-abstract-full').style.display = 'inline'; document.getElementById('1912.11777v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.11777v1-abstract-full" style="display: none;"> Molecular specific photonics localization technique, the inverse participation ratio (IPR), is a powerful technique to probe the nanoscale structural alterations due to abnormalities or chronic alcoholism in brain cells using the confocal image. Chronic alcoholism is correlated with medical, behavioral, and psychological problems including brain cell damage. However, probiotics such as Lactobacillus Plantarum has shown the promising result in soothing the human brain. This report, using the Confocal-IPR technique, nano to submicron scale structural abnormalities of the glial cells and the nuclei of alcoholic mice brain in the presence of probiotics. The increase in the structural disorder of alcoholic brain cells while the decrease or normalcy in the structural disorder of brain cells of mice fed with probiotics and alcohol simultaneously indicates that alcohol stimulates probiotics and enhances brain function. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.11777v1-abstract-full').style.display = 'none'; document.getElementById('1912.11777v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 figures, 10 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.11593">arXiv:1912.11593</a> <span> [<a href="https://arxiv.org/pdf/1912.11593">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> </div> </div> <p class="title is-5 mathjax"> Optical probing of pups brain tissue and molecular specific nuclear nano-structural alterations due to fetal alcoholism via dual spectroscopic approach </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adhikari%2C+P">Prakash Adhikari</a>, <a href="/search/physics?searchtype=author&query=Shukla%2C+P+K">Pradeep K. Shukla</a>, <a href="/search/physics?searchtype=author&query=Bhandari%2C+S">Shiva Bhandari</a>, <a href="/search/physics?searchtype=author&query=Meena%2C+A+S">Avtar S. Meena</a>, <a href="/search/physics?searchtype=author&query=Regmi%2C+B">Binod Regmi</a>, <a href="/search/physics?searchtype=author&query=Alharthi%2C+F">Fatemah Alharthi</a>, <a href="/search/physics?searchtype=author&query=Sahay%2C+P">Peeyush Sahay</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Radhakrishna Rao</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+P">Prabhakar Pradhan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.11593v1-abstract-short" style="display: inline;"> Mesoscopic physics-based dual spectroscopic imaging techniques, partial wave spectroscopy (PWS) and inverse participation ratio (IPR), are used to quantify the nano to submicron scales structural alterations in postnatal pups brain cells and tissues due to fetal alcoholism. Chronic alcoholism during pregnancy, being teratogenic, results in fetal alcohol syndrome and neurological disorder. Results… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.11593v1-abstract-full').style.display = 'inline'; document.getElementById('1912.11593v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.11593v1-abstract-full" style="display: none;"> Mesoscopic physics-based dual spectroscopic imaging techniques, partial wave spectroscopy (PWS) and inverse participation ratio (IPR), are used to quantify the nano to submicron scales structural alterations in postnatal pups brain cells and tissues due to fetal alcoholism. Chronic alcoholism during pregnancy, being teratogenic, results in fetal alcohol syndrome and neurological disorder. Results of PWS studies of brain tissues show a higher degree of structural alterations. Furthermore, the IPR analyses of cell nuclei show that spatial molecular mass density structural disorder increases in DNA while decreases for histone. This study characterize the brain spatial structures from molecular to tissue level in fetal alcoholism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.11593v1-abstract-full').style.display = 'none'; document.getElementById('1912.11593v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1812.10652</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.11202">arXiv:1905.11202</a> <span> [<a href="https://arxiv.org/pdf/1905.11202">pdf</a>, <a href="https://arxiv.org/format/1905.11202">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/1.5110604">10.1063/1.5110604 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A unified analysis of nano-to-microscale particle dispersion in tubular blood flow </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Liu%2C+Z">Zixiang Liu</a>, <a href="/search/physics?searchtype=author&query=Clausen%2C+J+R">Jonathan R. Clausen</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R+R">Rekha R. Rao</a>, <a href="/search/physics?searchtype=author&query=Aidun%2C+C+K">Cyrus K. Aidun</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.11202v4-abstract-short" style="display: inline;"> Transport of solid particles in blood flow exhibits qualitative differences in the transport mechanism when the particle varies from nanoscale to microscale size comparable to the red blood cell (RBC). The effect of microscale particle margination has been investigated by several groups. Also, the transport of nanoscale particles (NPs) in blood has received considerable attention in the past. This… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.11202v4-abstract-full').style.display = 'inline'; document.getElementById('1905.11202v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.11202v4-abstract-full" style="display: none;"> Transport of solid particles in blood flow exhibits qualitative differences in the transport mechanism when the particle varies from nanoscale to microscale size comparable to the red blood cell (RBC). The effect of microscale particle margination has been investigated by several groups. Also, the transport of nanoscale particles (NPs) in blood has received considerable attention in the past. This study attempts to bridge the gap by quantitatively showing how the transport mechanism varies with particle size from nano- to microscale. Using a three-dimensional (3D) multiscale method, the dispersion of particles in microscale tubular flows is investigated for various hematocrits, vessel diameters and particle sizes. NPs exhibit a nonuniform, smoothly-dispersed distribution across the tube radius due to severe Brownian motion. The near-wall concentration of NPs can be moderately enhanced by increasing hematocrit and confinement. Moreover, there exists a critical particle size ($\sim$1 $渭$m) that leads to excessive retention of particles in the cell-free region near the wall, i.e., margination. Above this threshold, the margination propensity increases with the particle size. The dominance of RBC-enhanced shear-induced diffusivity (RESID) over Brownian diffusivity (BD) results in 10 times higher radial diffusion rates in the RBC-laden region compared to that in the cell-free layer, correlated with the high margination propensity of microscale particles. This work captures the particle size-dependent transition from Brownian-motion dominant dispersion to margination using a unified 3D multiscale computational approach, and highlights the linkage between the radial distribution of RESID and the margination of particles in confined blood flows. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.11202v4-abstract-full').style.display = 'none'; document.getElementById('1905.11202v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics of Fluids 31, 081903 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.00664">arXiv:1905.00664</a> <span> [<a href="https://arxiv.org/pdf/1905.00664">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.99.195401">10.1103/PhysRevB.99.195401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spectroscopic Evaluation of Charge-transfer Doping and Strain in Graphene/MoS2 Heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">Rahul Rao</a>, <a href="/search/physics?searchtype=author&query=Islam%2C+A+E">Ahmad E. Islam</a>, <a href="/search/physics?searchtype=author&query=Singh%2C+S">Simranjeet Singh</a>, <a href="/search/physics?searchtype=author&query=Berry%2C+R">Rajiv Berry</a>, <a href="/search/physics?searchtype=author&query=Kawakami%2C+R+K">Roland K Kawakami</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+B">Benji Maruyama</a>, <a href="/search/physics?searchtype=author&query=Katoch%2C+J">Jyoti Katoch</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.00664v2-abstract-short" style="display: inline;"> It is important to study the van der Waals interface in emerging vertical heterostructures based on layered two-dimensional (2D) materials. Being atomically thin, 2D materials are susceptible to significant strains as well as charge transfer doping across the interfaces. Here we use Raman and photoluminescence (PL) spectroscopy to study the interface between monolayer graphene/MoS2 heterostructure… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.00664v2-abstract-full').style.display = 'inline'; document.getElementById('1905.00664v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.00664v2-abstract-full" style="display: none;"> It is important to study the van der Waals interface in emerging vertical heterostructures based on layered two-dimensional (2D) materials. Being atomically thin, 2D materials are susceptible to significant strains as well as charge transfer doping across the interfaces. Here we use Raman and photoluminescence (PL) spectroscopy to study the interface between monolayer graphene/MoS2 heterostructures prepared by mechanical exfoliation and layer-by-layer transfer. By using correlation analysis between the Raman modes of graphene and MoS2 we show that both layers are subjected to compressive strain and charge transfer doping following mechanical exfoliation and thermal annealing. Furthermore, we show that both strain and carrier concentration can be modulated in the heterostructures with additional thermal annealing. Our study highlights the importance of considering both mechanical and electronic coupling when characterizing the interface in van der Waals heterostructures, and demonstrates a method to tune their electromechanical properties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.00664v2-abstract-full').style.display = 'none'; document.getElementById('1905.00664v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 Figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 99, 195401, 2019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.11299">arXiv:1904.11299</a> <span> [<a href="https://arxiv.org/pdf/1904.11299">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.jpcc.8b09598">10.1021/acs.jpcc.8b09598 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> An In Situ Surface-Enhanced Infrared Absorption Spectroscopy Study of Electrochemical CO2 Reduction: Selectivity Dependence on Surface C-Bound and O-Bound Reaction Intermediates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Katayama%2C+Y">Yu Katayama</a>, <a href="/search/physics?searchtype=author&query=Nattino%2C+F">Francesco Nattino</a>, <a href="/search/physics?searchtype=author&query=Giordano%2C+L">Livia Giordano</a>, <a href="/search/physics?searchtype=author&query=Hwang%2C+J">Jonathan Hwang</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R+R">Reshma R. Rao</a>, <a href="/search/physics?searchtype=author&query=Andreussi%2C+O">Oliviero Andreussi</a>, <a href="/search/physics?searchtype=author&query=Marzari%2C+N">Nicola Marzari</a>, <a href="/search/physics?searchtype=author&query=Shao-Horn%2C+Y">Yang Shao-Horn</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1904.11299v1-abstract-short" style="display: inline;"> The CO_{2} electro-reduction reaction (CORR) is a promising avenue to convert greenhouse gases into high-value fuels and chemicals, in addition to being an attractive method for storing intermittent renewable energy. Although polycrystalline Cu surfaces have long known to be unique in their capabilities of catalyzing the conversion of CO_{2} to higher-order C1 and C2 fuels, such as hydrocarbons (C… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.11299v1-abstract-full').style.display = 'inline'; document.getElementById('1904.11299v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.11299v1-abstract-full" style="display: none;"> The CO_{2} electro-reduction reaction (CORR) is a promising avenue to convert greenhouse gases into high-value fuels and chemicals, in addition to being an attractive method for storing intermittent renewable energy. Although polycrystalline Cu surfaces have long known to be unique in their capabilities of catalyzing the conversion of CO_{2} to higher-order C1 and C2 fuels, such as hydrocarbons (CH_{4}, C_{2}H_{4} etc.) and alcohols (CH_{3}OH, C_{2}H_{5}OH), product selectivity remains a challenge. In this study, we select three metal catalysts (Pt, Au, Cu) and apply in situ surface enhanced infrared absorption spectroscopy (SEIRAS) and ambient-pressure X-ray photoelectron spectroscopy (APXPS), coupled to density-functional theory (DFT) calculations, to get insight into the reaction pathway for the CORR. We present a comprehensive reaction mechanism for the CORR, and show that the preferential reaction pathway can be rationalized in terms of metal-carbon (M-C) and metal-oxygen (M-O) affinity. We show that the final products are determined by the configuration of the initial intermediates, C-bound and O-bound, which can be obtained from CO_{2} and (H)CO_{3}, respectively. C1 hydrocarbons are produced via OCH_{3, ad} intermediates obtained from O-bound CO_{3, ad} and require a catalyst with relatively high affinity for O-bound intermediates. Additionally, C2 hydrocarbon formation is suggested to result from the C-C coupling between C-bound CO_{ad} and (H)CO_{ad}, which requires an optimal affinity for the C-bound species, so that (H)CO_{ad} can be further reduced without poisoning the catalyst surface. Our findings pave the way towards a design strategy for CORR catalysts with improved selectivity, based on this experimental/theoretical reaction mechanisms that have been identified. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.11299v1-abstract-full').style.display = 'none'; document.getElementById('1904.11299v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys. Chem. C 123, 5951 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.06452">arXiv:1904.06452</a> <span> [<a href="https://arxiv.org/pdf/1904.06452">pdf</a>, <a href="https://arxiv.org/format/1904.06452">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1017/jfm.2019.320">10.1017/jfm.2019.320 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nanoparticle diffusion in sheared cellular blood flow </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Liu%2C+Z">Zixiang Liu</a>, <a href="/search/physics?searchtype=author&query=Clausen%2C+J+R">Jonathan R. Clausen</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R+R">Rekha R. Rao</a>, <a href="/search/physics?searchtype=author&query=Aidun%2C+C+K">Cyrus K. Aidun</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1904.06452v3-abstract-short" style="display: inline;"> Using a multiscale blood flow solver, the complete diffusion tensor of nanoparticle (NP) in sheared cellular blood flow is calculated over a wide range of shear rate and haematocrit. In the short-time regime, NPs exhibit anomalous dispersive behaviors under high shear and high haematocrit due to the transient elongation and alignment of the red blood cells (RBCs). In the long-time regime, the NP d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.06452v3-abstract-full').style.display = 'inline'; document.getElementById('1904.06452v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.06452v3-abstract-full" style="display: none;"> Using a multiscale blood flow solver, the complete diffusion tensor of nanoparticle (NP) in sheared cellular blood flow is calculated over a wide range of shear rate and haematocrit. In the short-time regime, NPs exhibit anomalous dispersive behaviors under high shear and high haematocrit due to the transient elongation and alignment of the red blood cells (RBCs). In the long-time regime, the NP diffusion tensor features high anisotropy. Particularly, there exists a critical shear rate ($\sim$100 $s^{-1}$) around which the shear-rate dependence of the diffusivity tensor changes from linear to nonlinear scale. Above the critical shear rate, the cross-stream diffusivity terms vary sublinearly with shear rate, while the longitudinal term varies superlinearly. The dependence on haematocrit is linear in general except at high shear rates, where a sublinear scale is found for the vorticity term and a quadratic scale for the longitudinal term. Through analysis of the suspension microstructure and numerical experiments, the nonlinear hemorheological dependence of the NP diffusion tensor is attributed to the streamwise elongation and cross-stream contraction of RBCs under high shear, quantified by a Capillary number. The RBC size is shown to be the characteristic length scale affecting the RBC-enhanced shear-induced diffusion (RESID), while the NP size at submicron exhibits negligible influence on the RESID. Based on the observed scaling behaviors, empirical correlations are proposed to bridge the NP diffusion tensor to specific shear rate and haematocrit. The characterized NP diffusion tensor provides a constitutive relation that can lead to more effective continuum models to tackle large-scale NP biotransport applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.06452v3-abstract-full').style.display = 'none'; document.getElementById('1904.06452v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Fluid Mechanics 871 (2019): 636-667 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.00090">arXiv:1903.00090</a> <span> [<a href="https://arxiv.org/pdf/1903.00090">pdf</a>, <a href="https://arxiv.org/format/1903.00090">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-019-11676-x">10.1038/s41467-019-11676-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermodynamic Efficiency in Dissipative Chemistry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Penocchio%2C+E">Emanuele Penocchio</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Riccardo Rao</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+M">Massimiliano Esposito</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1903.00090v1-abstract-short" style="display: inline;"> Chemical processes in closed systems are poorly controllable since they always relax to equilibrium. Living systems avoid this fate and give rise to a much richer diversity of phenomena by operating under nonequilibrium conditions. Recent experiments in dissipative self-assembly also demonstrated that by opening reaction vessels and steering certain concentrations, an ocean of opportunities for ar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.00090v1-abstract-full').style.display = 'inline'; document.getElementById('1903.00090v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.00090v1-abstract-full" style="display: none;"> Chemical processes in closed systems are poorly controllable since they always relax to equilibrium. Living systems avoid this fate and give rise to a much richer diversity of phenomena by operating under nonequilibrium conditions. Recent experiments in dissipative self-assembly also demonstrated that by opening reaction vessels and steering certain concentrations, an ocean of opportunities for artificial synthesis and energy storage emerges. To navigate it, thermodynamic notions of energy, work and dissipation must be established for these open chemical systems. Here, we do so by building upon recent theoretical advances in nonequilibrium statistical physics. As a central outcome, we show how to quantify the efficiency of such chemical operations and lay the foundation for performance analysis of any dissipative chemical process. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.00090v1-abstract-full').style.display = 'none'; document.getElementById('1903.00090v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">revtex format: 11 pages (4 + 7 for appendices), 6 figures (4 + 2)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.10652">arXiv:1812.10652</a> <span> [<a href="https://arxiv.org/pdf/1812.10652">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> </div> </div> <p class="title is-5 mathjax"> Photonic localization probe of molecular specific intranuclear structural alterations in brain cells due to fetal alcoholism via confocal microscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bhandari%2C+S">Shiva Bhandari</a>, <a href="/search/physics?searchtype=author&query=Shukla%2C+P+K">Pradeep K. Shukla</a>, <a href="/search/physics?searchtype=author&query=Sahay%2C+P">Peeyush Sahay</a>, <a href="/search/physics?searchtype=author&query=Meena%2C+A+S">Avtar S. Meena</a>, <a href="/search/physics?searchtype=author&query=Adhikari%2C+P">Prakash Adhikari</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Radhakrishna Rao</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+P">Prabhakar Pradhan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1812.10652v1-abstract-short" style="display: inline;"> Molecular specific photonic localization is a sensitive technique to probe the structural alterations or abnormalities in a cell such as abnormalities due to alcohol or other drugs. Alcohol consumption during pregnancy by mother, or fetal alcoholism, is one of the major factors of mental retardation in children. Fetal alcohol syndrome and alcohol related neurodevelopmental disorder are awful outco… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.10652v1-abstract-full').style.display = 'inline'; document.getElementById('1812.10652v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.10652v1-abstract-full" style="display: none;"> Molecular specific photonic localization is a sensitive technique to probe the structural alterations or abnormalities in a cell such as abnormalities due to alcohol or other drugs. Alcohol consumption during pregnancy by mother, or fetal alcoholism, is one of the major factors of mental retardation in children. Fetal alcohol syndrome and alcohol related neurodevelopmental disorder are awful outcomes of the maternal alcohol consumption linked with notable cognitive and behavioral defects. Alcohol consumed by the pregnant mother, being teratogenic, interferes with the fetal health resulting brain damage and other birth defects. This might affect the brain cells at the very nanolevel which cannot be predicted by the present histopathological procedures. We perform quantification of nanoscale spatial structural alterations in two different spatial molecular components, DNA and histone molecular mass densities, in brain cell nuclei of fetal alcohol effected (FAE) pups at postnatal day 60. Confocal images of the brain cells are collected and the degree of morphological alterations in DNA and histone, in terms of mass density fluctuations are obtained using the recently developed molecular specific light or photonic localization analysis technique. The results show an increase in degree of spatial structural disorder in DNA and a reduced histone modification. Increase in spatial disorder in DNA may suggest DNA unwinding and possibly responsible for increase in gene expression. Reduced histone modification may suggest its release from the DNA and help in the unwinding of DNA and gene expression. The probable cause for structural disorder as well as opposite rearrangements for DNA and histone molecules in fetal alcohol effects is also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.10652v1-abstract-full').style.display = 'none'; document.getElementById('1812.10652v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1801.02299">arXiv:1801.02299</a> <span> [<a href="https://arxiv.org/pdf/1801.02299">pdf</a>, <a href="https://arxiv.org/format/1801.02299">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1002/fld.4752">10.1002/fld.4752 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multiscale method based on coupled lattice-Boltzmann and Langevin-dynamics for direct simulation of nanoscale particle/polymer suspensions in complex flows </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Liu%2C+Z">Zixiang Liu</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+Y">Yuanzheng Zhu</a>, <a href="/search/physics?searchtype=author&query=Clausen%2C+J+R">Jonathan R. Clausen</a>, <a href="/search/physics?searchtype=author&query=Lechman%2C+J+B">Jeremy B. Lechman</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R+R">Rekha R. Rao</a>, <a href="/search/physics?searchtype=author&query=Aidun%2C+C+K">Cyrus K. Aidun</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1801.02299v6-abstract-short" style="display: inline;"> A hybrid computational method coupling the lattice-Boltzmann (LB) method and a Langevin-dynamics (LD) method is developed to simulate nanoscale particle and polymer (NPP) suspensions in the presence of both thermal fluctuation and long-range many-body hydrodynamic interactions (HI). Brownian motion of the NPP is explicitly captured by a stochastic forcing term in the LD method. The LD method is tw… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.02299v6-abstract-full').style.display = 'inline'; document.getElementById('1801.02299v6-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1801.02299v6-abstract-full" style="display: none;"> A hybrid computational method coupling the lattice-Boltzmann (LB) method and a Langevin-dynamics (LD) method is developed to simulate nanoscale particle and polymer (NPP) suspensions in the presence of both thermal fluctuation and long-range many-body hydrodynamic interactions (HI). Brownian motion of the NPP is explicitly captured by a stochastic forcing term in the LD method. The LD method is two-way coupled to the non-fluctuating LB fluid through a discrete LB forcing source distribution to capture the long-range HI. To ensure intrinsically linear scalability with respect to the number of particles, an Eulerian-host algorithm for short-distance particle neighbor search and interaction is developed and embedded to LB-LD framework. The validity and accuracy of the LB-LD approach are demonstrated through several sample problems. The simulation results show good agreements with theory and experiment. The LB-LD approach can be favorably incorporated into complex multiscale computational frameworks for efficiently simulating multiscale, multicomponent particulate suspension systems such as complex blood suspensions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.02299v6-abstract-full').style.display = 'none'; document.getElementById('1801.02299v6-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published in International Journal for Numerical Methods in Fluids</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1801.02122">arXiv:1801.02122</a> <span> [<a href="https://arxiv.org/pdf/1801.02122">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.compfluid.2018.03.022">10.1016/j.compfluid.2018.03.022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nanoparticle Transport in Cellular Blood Flow </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Liu%2C+Z">Zixiang Liu</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+Y">Yuanzheng Zhu</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R+R">Rekha R. Rao</a>, <a href="/search/physics?searchtype=author&query=Clausen%2C+J+R">Jonathan R. Clausen</a>, <a href="/search/physics?searchtype=author&query=Aidun%2C+C+K">Cyrus K. Aidun</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1801.02122v3-abstract-short" style="display: inline;"> The biotransport of the intravascular nanoparticle (NP) is influenced by both the complex cellular flow environment and the NP characteristics. Being able to computationally simulate such intricate transport phenomenon with high efficiency is of far-reaching significance to the development of nanotherapeutics, yet challenging due to large length-scale discrepancies between NP and red blood cell (R… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.02122v3-abstract-full').style.display = 'inline'; document.getElementById('1801.02122v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1801.02122v3-abstract-full" style="display: none;"> The biotransport of the intravascular nanoparticle (NP) is influenced by both the complex cellular flow environment and the NP characteristics. Being able to computationally simulate such intricate transport phenomenon with high efficiency is of far-reaching significance to the development of nanotherapeutics, yet challenging due to large length-scale discrepancies between NP and red blood cell (RBC) as well as the complexity of NP dynamics. Recently, a lattice-Boltzmann (LB) based multiscale simulation method has been developed to capture both NP scale and cellular level transport phenomenon at high computational efficiency. The basic components of this method include the LB treatment for the fluid phase, a spectrin-link method for RBCs, and a Langevin dynamics (LD) approach to capturing the motion of the suspended NPs. Comprehensive two-way coupling schemes are established to capture accurate interactions between each component. The accuracy and robustness of the LB-LD coupling method are demonstrated through the relaxation of a single NP with initial momentum and self-diffusion of NPs. This approach is then applied to study the migration of NPs in a capillary vessel under physiological conditions. It is shown that Brownian motion is most significant for the NP distribution in capillary vessels. For 1~100 nm particles, the Brownian diffusion is the dominant radial diffusive mechanism compared to the RBC-enhanced diffusion. For ~500 nm particles, the Brownian diffusion and RBC-enhanced diffusion are comparable drivers for the particle radial diffusion process. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.02122v3-abstract-full').style.display = 'none'; document.getElementById('1801.02122v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published on Computers & Fluids</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 76Z05 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1712.08785">arXiv:1712.08785</a> <span> [<a href="https://arxiv.org/pdf/1712.08785">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Tissues and Organs">q-bio.TO</span> </div> </div> <p class="title is-5 mathjax"> Optical study of stress hormone-induced nanoscale structural alteration in brain using partial wave spectroscopic (PWS) microscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bhandari%2C+S">Shiva Bhandari</a>, <a href="/search/physics?searchtype=author&query=Shukla%2C+P">Pradeep Shukla</a>, <a href="/search/physics?searchtype=author&query=Almabadi%2C+H">Huda Almabadi</a>, <a href="/search/physics?searchtype=author&query=Sahay%2C+P">Peeyush Sahay</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Radhakrishna Rao</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+P">Prabhakar Pradhan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1712.08785v1-abstract-short" style="display: inline;"> Chronic stress affects nano to microscale structures of the brain cells/tissues due the suppression of neural growths and reconnections, hence the neuronal activities. This results in depression, memory loss and even the death of the brain cells. Our recently developed novel optical technique, partial wave spectroscopic (PWS) microscopy has nanoscale sensitivity, and hence, can detect nanoscale ch… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.08785v1-abstract-full').style.display = 'inline'; document.getElementById('1712.08785v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1712.08785v1-abstract-full" style="display: none;"> Chronic stress affects nano to microscale structures of the brain cells/tissues due the suppression of neural growths and reconnections, hence the neuronal activities. This results in depression, memory loss and even the death of the brain cells. Our recently developed novel optical technique, partial wave spectroscopic (PWS) microscopy has nanoscale sensitivity, and hence, can detect nanoscale changes in brain tissues due to stress. In this study, we applied this technique to quantify the stress related structural changes in the corticosterone-treated mouse model of stress. Our results show that brains from corticosterone-treated mice showed higher nanoscale structural disorder in the hippocampal region as compared to the brain from normal (vehicle) mice. The increase in structural alteration correlates with the duration of the stress. We further quantified the relative changes and the spatial localization of these changes in this mouse model and found out that the maximum changes occurred nearly symmetrically in both regions of the hippocampus. The mRNA for stress-related genes, BDNF and TrkB were also significantly reduced in the hippocampus of corticosterone-treated mice compared to that in control mice. These results indicate that chronic corticosterone treatment induces nanoscale structural alterations in mouse brain that corresponds to the changes in stress-related gene expression. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.08785v1-abstract-full').style.display = 'none'; document.getElementById('1712.08785v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 Pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.06045">arXiv:1709.06045</a> <span> [<a href="https://arxiv.org/pdf/1709.06045">pdf</a>, <a href="https://arxiv.org/format/1709.06045">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Molecular Networks">q-bio.MN</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1367-2630/aab5c9">10.1088/1367-2630/aab5c9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermodynamically Consistent Coarse Graining of Biocatalysts beyond Michaelis--Menten </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wachtel%2C+A">Artur Wachtel</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Riccardo Rao</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+M">Massimiliano Esposito</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1709.06045v2-abstract-short" style="display: inline;"> Starting from the detailed catalytic mechanism of a biocatalyst we provide a coarse-graining procedure which, by construction, is thermodynamically consistent. This procedure provides stoichiometries, reaction fluxes (rate laws), and reaction forces (Gibbs energies of reaction) for the coarse-grained level. It can treat active transporters and molecular machines, and thus extends the applicability… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.06045v2-abstract-full').style.display = 'inline'; document.getElementById('1709.06045v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.06045v2-abstract-full" style="display: none;"> Starting from the detailed catalytic mechanism of a biocatalyst we provide a coarse-graining procedure which, by construction, is thermodynamically consistent. This procedure provides stoichiometries, reaction fluxes (rate laws), and reaction forces (Gibbs energies of reaction) for the coarse-grained level. It can treat active transporters and molecular machines, and thus extends the applicability of ideas that originated in enzyme kinetics. Our results lay the foundations for systematic studies of the thermodynamics of large-scale biochemical reaction networks. Moreover, we identify the conditions under which a relation between one-way fluxes and forces holds at the coarse-grained level as it holds at the detailed level. In doing so, we clarify the speculations and broad claims made in the literature about such a general flux--force relation. As a further consequence we show that, in contrast to common belief, the second law of thermodynamics does not require the currents and the forces of biochemical reaction networks to be always aligned. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.06045v2-abstract-full').style.display = 'none'; document.getElementById('1709.06045v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> New Journal of Physics 20 (2018) 042002 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1612.07911">arXiv:1612.07911</a> <span> [<a href="https://arxiv.org/pdf/1612.07911">pdf</a>, <a href="https://arxiv.org/format/1612.07911">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> A Boltzmann scheme with physically relevant discrete velocities for Euler equations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raghavendra%2C+N+V">N. Venkata Raghavendra</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1612.07911v1-abstract-short" style="display: inline;"> Kinetic or Boltzmann schemes are interesting alternatives to the macroscopic numerical methods for solving the hyperbolic conservation laws of gas dynamics. They utilize the particle-based description instead of the wave propagation models. While the continuous particle velocity based upwind schemes were developed in the earlier decades, the discrete velocity Boltzmann schemes introduced in the la… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1612.07911v1-abstract-full').style.display = 'inline'; document.getElementById('1612.07911v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1612.07911v1-abstract-full" style="display: none;"> Kinetic or Boltzmann schemes are interesting alternatives to the macroscopic numerical methods for solving the hyperbolic conservation laws of gas dynamics. They utilize the particle-based description instead of the wave propagation models. While the continuous particle velocity based upwind schemes were developed in the earlier decades, the discrete velocity Boltzmann schemes introduced in the last decade are found to be simpler and are easier to handle. In this work, we introduce a novel way of introducing discrete velocities which correspond to the physical wave speeds and formulate a discrete velocity Boltzmann scheme for solving Euler equations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1612.07911v1-abstract-full').style.display = 'none'; document.getElementById('1612.07911v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 December, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.06038">arXiv:1608.06038</a> <span> [<a href="https://arxiv.org/pdf/1608.06038">pdf</a>, <a href="https://arxiv.org/format/1608.06038">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s12036-017-9450-0">10.1007/s12036-017-9450-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Charged Particle Monitor on the AstroSat mission </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+A+R">A. R. Rao</a>, <a href="/search/physics?searchtype=author&query=Patil%2C+M+H">M. H. Patil</a>, <a href="/search/physics?searchtype=author&query=Bhargava%2C+Y">Yash Bhargava</a>, <a href="/search/physics?searchtype=author&query=Khanna%2C+R">Rakesh Khanna</a>, <a href="/search/physics?searchtype=author&query=Hingar%2C+M+K">M. K. Hingar</a>, <a href="/search/physics?searchtype=author&query=Kutty%2C+A+P+K">A. P. K. Kutty</a>, <a href="/search/physics?searchtype=author&query=Malkar%2C+J+P">J. P. Malkar</a>, <a href="/search/physics?searchtype=author&query=Basak%2C+R">Rupal Basak</a>, <a href="/search/physics?searchtype=author&query=Sreekumar%2C+S">S. Sreekumar</a>, <a href="/search/physics?searchtype=author&query=Samuel%2C+E">Essy Samuel</a>, <a href="/search/physics?searchtype=author&query=Priya%2C+P">P. Priya</a>, <a href="/search/physics?searchtype=author&query=Vinod%2C+P">P. Vinod</a>, <a href="/search/physics?searchtype=author&query=Bhattacharya%2C+D">D. Bhattacharya</a>, <a href="/search/physics?searchtype=author&query=Bhalerao%2C+V">V. Bhalerao</a>, <a href="/search/physics?searchtype=author&query=Vadawale%2C+S+V">S. V. Vadawale</a>, <a href="/search/physics?searchtype=author&query=Mithun%2C+N+P+S">N. P. S. Mithun</a>, <a href="/search/physics?searchtype=author&query=Pandiyan%2C+R">R. Pandiyan</a>, <a href="/search/physics?searchtype=author&query=Subbarao%2C+K">K. Subbarao</a>, <a href="/search/physics?searchtype=author&query=Seetha%2C+S">S. Seetha</a>, <a href="/search/physics?searchtype=author&query=Sarma%2C+K+S">K. Suryanarayana Sarma</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1608.06038v1-abstract-short" style="display: inline;"> Charged Particle Monitor (CPM) on-board the AstroSat satellite is an instrument designed to detect the flux of charged particles at the satellite location. A Cesium Iodide Thallium (CsI(Tl)) crystal is used with a Kapton window to detect protons with energies greater than 1 MeV. The ground calibration of CPM was done using gamma-rays from radioactive sources and protons from particle accelerators.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.06038v1-abstract-full').style.display = 'inline'; document.getElementById('1608.06038v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.06038v1-abstract-full" style="display: none;"> Charged Particle Monitor (CPM) on-board the AstroSat satellite is an instrument designed to detect the flux of charged particles at the satellite location. A Cesium Iodide Thallium (CsI(Tl)) crystal is used with a Kapton window to detect protons with energies greater than 1 MeV. The ground calibration of CPM was done using gamma-rays from radioactive sources and protons from particle accelerators. Based on the ground calibration results, energy deposition above 1 MeV are accepted and particle counts are recorded. It is found that CPM counts are steady and the signal for the onset and exit of South Atlantic Anomaly (SAA) region are generated in a very reliable and stable manner. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.06038v1-abstract-full').style.display = 'none'; document.getElementById('1608.06038v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 8 figures, 5 tables. To appear in JAA special issue on AstroSat</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.07257">arXiv:1602.07257</a> <span> [<a href="https://arxiv.org/pdf/1602.07257">pdf</a>, <a href="https://arxiv.org/format/1602.07257">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevX.6.041064">10.1103/PhysRevX.6.041064 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nonequilibrium Thermodynamics of Chemical Reaction Networks: Wisdom from Stochastic Thermodynamics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">Riccardo Rao</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+M">Massimiliano Esposito</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.07257v3-abstract-short" style="display: inline;"> We build a rigorous nonequilibrium thermodynamic description for open chemical reaction networks of elementary reactions. Their dynamics is described by deterministic rate equations satisfying mass action law. Our most general framework considers open networks driven by time-dependent chemostats. The energy and entropy balances are established and a nonequilibrium Gibbs free energy is introduced.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.07257v3-abstract-full').style.display = 'inline'; document.getElementById('1602.07257v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.07257v3-abstract-full" style="display: none;"> We build a rigorous nonequilibrium thermodynamic description for open chemical reaction networks of elementary reactions. Their dynamics is described by deterministic rate equations satisfying mass action law. Our most general framework considers open networks driven by time-dependent chemostats. The energy and entropy balances are established and a nonequilibrium Gibbs free energy is introduced. The difference between this latter and its equilibrium form represents the minimal work done by the chemostats to bring the network in its nonequilibrium state. It is minimized in nondriven detailed-balanced networks (i.e. networks which relax to equilibrium states) and has an interesting information-theoretic interpretation. We further show that the entropy production of complex balanced networks (i.e. networks which relax to special kinds of nonequilibrium steady states) splits into two non-negative contributions. One charaterizing the dissipation of the nonequilibrium steady state and the other the transients due to relaxation and driving. Our theory lays the path to study time-dependent energy and information transduction in biochemical networks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.07257v3-abstract-full').style.display = 'none'; document.getElementById('1602.07257v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 4 figures. v3: version published in Phys. Rev. X</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. X 6, 041064 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.08593">arXiv:1512.08593</a> <span> [<a href="https://arxiv.org/pdf/1512.08593">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> </div> </div> <p class="title is-5 mathjax"> Nanoscale intracellular mass-density alteration as a signature of the effect of alcohol on early carcinogenesis: A transmission electron microscopy (TEM) study </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ghimire%2C+H+M">Hemendra M. Ghimire</a>, <a href="/search/physics?searchtype=author&query=Shukla%2C+P">Pradeep Shukla</a>, <a href="/search/physics?searchtype=author&query=Sahay%2C+P">Peeyush Sahay</a>, <a href="/search/physics?searchtype=author&query=Almabadi%2C+H">Huda Almabadi</a>, <a href="/search/physics?searchtype=author&query=Tripathi%2C+V">Vibha Tripathi</a>, <a href="/search/physics?searchtype=author&query=Skalli%2C+O">Omar Skalli</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R+K">R. K. Rao</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+P">Prabhakar Pradhan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.08593v1-abstract-short" style="display: inline;"> Alcohol consumption interferes with the functioning of multiple organ systems, causing changes in the chemistry, physiology and pathology of tissues and cellular organelles. Although epigenetic modifications underlie the development of cancer, exposure to carcinogenic chemicals, such as alcohol, can also contribute to disease development. However, the effects of chronic alcoholism on normal or pre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.08593v1-abstract-full').style.display = 'inline'; document.getElementById('1512.08593v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.08593v1-abstract-full" style="display: none;"> Alcohol consumption interferes with the functioning of multiple organ systems, causing changes in the chemistry, physiology and pathology of tissues and cellular organelles. Although epigenetic modifications underlie the development of cancer, exposure to carcinogenic chemicals, such as alcohol, can also contribute to disease development. However, the effects of chronic alcoholism on normal or pre-carcinogenic cells/tissues in different organelles are not well understood. Therefore, we herein study the effect of alcohol consumption on colonic nucleus using control and azoxymethane (AOM) and dextran sulfate sodium (DSS) treated carcinogenic mice. Previous studies showed that progression of carcinogenesis is associated with increase in the degree of intranuclear nanoscale structural disorder. In the present work, we quantify the degree of nanostructural disorder as a measure of carcinogenesis. To accomplish this, transmission electron microscopy (TEM) imaging of respective colonic epithelial cell nuclei are used to construct disordered optical lattices, and the properties of nanoscale disorder are then studied by analyzing the inverse participation ratio (IPR) of the spatially localized eigenfunctions of these optical lattices. Nanoscale structural disorder strength, as a marker of cancer progression, is measured in the length scale of 10 to 75 nm. Results show no significant visible effect in nanoscale structural changes on colon cell nuclei from alcohol exposure. However, alcohol was found to act as an enhancer of nanoscale disorder in precancerous cells and, hence, carcinogenic processes. To the best of our knowledge, this is the first study to quantify the effect of alcohol on early carcinogenic biological cells, using mesoscopic condensed matter physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.08593v1-abstract-full').style.display = 'none'; document.getElementById('1512.08593v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 2 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.08589">arXiv:1512.08589</a> <span> [<a href="https://arxiv.org/pdf/1512.08589">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> </div> </div> <p class="title is-5 mathjax"> Quantitative analysis of the nanoscale intra-nuclear structural alterations in hippocampal cells in chronic alcoholism via transmission electron microscopy study </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sahay%2C+P">Peeyush Sahay</a>, <a href="/search/physics?searchtype=author&query=Shukla%2C+P">Pradeep Shukla</a>, <a href="/search/physics?searchtype=author&query=Ghimire%2C+H+M">Hemendra M. Ghimire</a>, <a href="/search/physics?searchtype=author&query=Almabadi%2C+H">Huda Almabadi</a>, <a href="/search/physics?searchtype=author&query=Tripathi%2C+V">Vibha Tripathi</a>, <a href="/search/physics?searchtype=author&query=Mohanty%2C+S+K">Samarendra K. Mohanty</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Radhakrishna Rao</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+P">Prabhakar Pradhan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.08589v1-abstract-short" style="display: inline;"> Chronic alcoholism is known to alter morphology of hippocampal, an important region of cognitive function in the brain. We performed quantification of nanoscale structural alterations in nuclei of hippocampal neuron cells due to chronic alcoholism, in mice model. Transmission electron microscopy images of the neuron cells were obtained and the degrees of structural alteration, in terms of mass den… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.08589v1-abstract-full').style.display = 'inline'; document.getElementById('1512.08589v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.08589v1-abstract-full" style="display: none;"> Chronic alcoholism is known to alter morphology of hippocampal, an important region of cognitive function in the brain. We performed quantification of nanoscale structural alterations in nuclei of hippocampal neuron cells due to chronic alcoholism, in mice model. Transmission electron microscopy images of the neuron cells were obtained and the degrees of structural alteration, in terms of mass density fluctuations, were determined using the recently developed light localization analysis technique. The results, obtained at the length scales ranging from 33 to 195 nm, show that the 4-week alcohol fed mice have higher degree of structural alteration in comparison to the control mice. The degree of structural alterations starts becoming significantly distinguishable around 100 nm sample length, which is the typical length scale of the building blocks of cells, such as DNA, RNA, etc. Different degrees of structural alterations at such length scales suggest possible structural rearrangement of chromatin inside the nuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.08589v1-abstract-full').style.display = 'none'; document.getElementById('1512.08589v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1510.00353">arXiv:1510.00353</a> <span> [<a href="https://arxiv.org/pdf/1510.00353">pdf</a>, <a href="https://arxiv.org/format/1510.00353">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Numerical Analysis">math.NA</span> </div> </div> <p class="title is-5 mathjax"> Genuinely Multidimensional Kinetic Scheme For Euler Equations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tiwari%2C+P">Praveer Tiwari</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1510.00353v1-abstract-short" style="display: inline;"> A new framework based on Boltzmann equation which is genuinely multidimensional and mesh-less is developed for solving Euler's equations. The idea is to use the method of moment of Boltzmann equation to operate in multidimensions using polar coordinates. The aim is to develop a framework which is genuinely multidimensional and can be implemented with different methodologies, no matter whether it i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.00353v1-abstract-full').style.display = 'inline'; document.getElementById('1510.00353v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1510.00353v1-abstract-full" style="display: none;"> A new framework based on Boltzmann equation which is genuinely multidimensional and mesh-less is developed for solving Euler's equations. The idea is to use the method of moment of Boltzmann equation to operate in multidimensions using polar coordinates. The aim is to develop a framework which is genuinely multidimensional and can be implemented with different methodologies, no matter whether it is in finite difference, finite volume or finite element form. There is a considerable improvement in capturing shocks and other discontinuities. Also, since the method is multidimensional, the flow features are captured isotropically. The method is further extended to second order using 'Arc of Approach' concept. The framework is developed as a finite difference method (called as GINEUS) and is tested on the benchmark test cases. The results are compared against Kinetic Flux Vector Splitting Method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.00353v1-abstract-full').style.display = 'none'; document.getElementById('1510.00353v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 October, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.07446">arXiv:1509.07446</a> <span> [<a href="https://arxiv.org/pdf/1509.07446">pdf</a>, <a href="https://arxiv.org/format/1509.07446">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/1.4938009">10.1063/1.4938009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Glucans monomer-exchange dynamics as an open chemical network </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">Riccardo Rao</a>, <a href="/search/physics?searchtype=author&query=Lacoste%2C+D">David Lacoste</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+M">Massimiliano Esposito</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1509.07446v2-abstract-short" style="display: inline;"> We describe the oligosaccharides-exchange dynamics performed by so-called D-enzymes on polysaccharides. To mimic physiological conditions, we treat this process as an open chemical network by assuming some of the polymer concentrations fixed (chemostatting). We show that three different long-time behaviors may ensue: equilibrium states, nonequilibrium steady states, and continuous growth states. W… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.07446v2-abstract-full').style.display = 'inline'; document.getElementById('1509.07446v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.07446v2-abstract-full" style="display: none;"> We describe the oligosaccharides-exchange dynamics performed by so-called D-enzymes on polysaccharides. To mimic physiological conditions, we treat this process as an open chemical network by assuming some of the polymer concentrations fixed (chemostatting). We show that three different long-time behaviors may ensue: equilibrium states, nonequilibrium steady states, and continuous growth states. We dynamically and thermodynamically characterize these states and emphasize the crucial role of conservation laws in identifying the chemostatting conditions inducing them. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.07446v2-abstract-full').style.display = 'none'; document.getElementById('1509.07446v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 9 figures and 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Chem. Phys. 143, 244903 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1505.04089">arXiv:1505.04089</a> <span> [<a href="https://arxiv.org/pdf/1505.04089">pdf</a>, <a href="https://arxiv.org/format/1505.04089">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Numerical Analysis">math.NA</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> Explicit and Implicit Kinetic Streamlined-Upwind Petrov Galerkin Method for Hyperbolic Partial Differential Equations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Jagtap%2C+A+D">Ameya Dilip Jagtap</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1505.04089v1-abstract-short" style="display: inline;"> A novel explicit and implicit Kinetic Streamlined-Upwind Petrov Galerkin (KSUPG) scheme is presented for hyperbolic equations such as Burgers equation and compressible Euler equations. The proposed scheme performs better than the original SUPG stabilized method in multi-dimensions. To demonstrate the numerical accuracy of the scheme, various numerical experiments have been carried out for 1D and 2… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.04089v1-abstract-full').style.display = 'inline'; document.getElementById('1505.04089v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1505.04089v1-abstract-full" style="display: none;"> A novel explicit and implicit Kinetic Streamlined-Upwind Petrov Galerkin (KSUPG) scheme is presented for hyperbolic equations such as Burgers equation and compressible Euler equations. The proposed scheme performs better than the original SUPG stabilized method in multi-dimensions. To demonstrate the numerical accuracy of the scheme, various numerical experiments have been carried out for 1D and 2D Burgers equation as well as for 1D and 2D Euler equations using Q4 and T3 elements. Furthermore, spectral stability analysis is done for the explicit 2D formulation. Finally, a comparison is made between explicit and implicit versions of the KSUPG scheme. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.04089v1-abstract-full').style.display = 'none'; document.getElementById('1505.04089v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">30 pages, 22 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.07034">arXiv:1504.07034</a> <span> [<a href="https://arxiv.org/pdf/1504.07034">pdf</a>, <a href="https://arxiv.org/format/1504.07034">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Cellular Automata and Lattice Gases">nlin.CG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> </div> <p class="title is-5 mathjax"> A Lattice Boltzmann Relaxation Scheme for Inviscid Compressible Flows </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+S+V+R">S. V. Raghurama Rao</a>, <a href="/search/physics?searchtype=author&query=Deshmukh%2C+R">Rohan Deshmukh</a>, <a href="/search/physics?searchtype=author&query=Kotnala%2C+S">Sourabh Kotnala</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.07034v1-abstract-short" style="display: inline;"> A novel Lattice Boltzmann Method applicable to compressible fluid flows is developed. This method is based on replacing the governing equations by a relaxation system and the interpretation of the diagonal form of the relaxation system as a discrete velocity Boltzmann system. As a result of this interpretation, the local equilibrium distribution functions are simple algebraic functions of the cons… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.07034v1-abstract-full').style.display = 'inline'; document.getElementById('1504.07034v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.07034v1-abstract-full" style="display: none;"> A novel Lattice Boltzmann Method applicable to compressible fluid flows is developed. This method is based on replacing the governing equations by a relaxation system and the interpretation of the diagonal form of the relaxation system as a discrete velocity Boltzmann system. As a result of this interpretation, the local equilibrium distribution functions are simple algebraic functions of the conserved variables and the fluxes, without the low Mach number expansion present in the equilibrium distribution of the traditional Lattice Boltzmann Method (LBM). This new Lattice Boltzmann Relaxation Scheme (LBRS) thus overcomes the low Mach number limitation and can successfully simulate compressible flows. While doing so, our algorithm retains all the distinctive features of the traditional LBM. Numerical simulations carried out for inviscid flows in one and two dimensions show that the method can simulate the features of compressible flows like shock waves and expansion waves. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.07034v1-abstract-full').style.display = 'none'; document.getElementById('1504.07034v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.02494">arXiv:1504.02494</a> <span> [<a href="https://arxiv.org/pdf/1504.02494">pdf</a>, <a href="https://arxiv.org/ps/1504.02494">ps</a>, <a href="https://arxiv.org/format/1504.02494">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Subcellular Processes">q-bio.SC</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-5468/2015/06/P06001">10.1088/1742-5468/2015/06/P06001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermodynamics of accuracy in kinetic proofreading: Dissipation and efficiency trade-offs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">Riccardo Rao</a>, <a href="/search/physics?searchtype=author&query=Peliti%2C+L">Luca Peliti</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.02494v1-abstract-short" style="display: inline;"> The high accuracy exhibited by biological information transcription processes is due to kinetic proofreading, i.e., by a mechanism which reduces the error rate of the information-handling process by driving it out of equilibrium. We provide a consistent thermodynamic description of enzyme-assisted assembly processes involving competing substrates, in a Master Equation framework. We introduce and e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.02494v1-abstract-full').style.display = 'inline'; document.getElementById('1504.02494v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.02494v1-abstract-full" style="display: none;"> The high accuracy exhibited by biological information transcription processes is due to kinetic proofreading, i.e., by a mechanism which reduces the error rate of the information-handling process by driving it out of equilibrium. We provide a consistent thermodynamic description of enzyme-assisted assembly processes involving competing substrates, in a Master Equation framework. We introduce and evaluate a measure of the efficiency based on rigorous non-equilibrium inequalities. The performance of several proofreading models are thus analyzed and the related time, dissipation and efficiency vs. error trade-offs exhibited for different discrimination regimes. We finally introduce and analyze in the same framework a simple model which takes into account correlations between consecutive enzyme-assisted assembly steps. This work highlights the relevance of the distinction between energetic and kinetic discrimination regimes in enzyme-substrate interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.02494v1-abstract-full').style.display = 'none'; document.getElementById('1504.02494v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">IOP Class, 20 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Stat. Mech. (2015) P06001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1501.00515">arXiv:1501.00515</a> <span> [<a href="https://arxiv.org/pdf/1501.00515">pdf</a>, <a href="https://arxiv.org/format/1501.00515">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.jcp.2015.01.017">10.1016/j.jcp.2015.01.017 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Numerical Stability of Explicit Off-lattice Boltzmann Schemes: A comparative study </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+P+R">Parthib R. Rao</a>, <a href="/search/physics?searchtype=author&query=Schaefer%2C+L+A">Laura A. Schaefer</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1501.00515v1-abstract-short" style="display: inline;"> The off-lattice Boltzmann (OLB) method consists of numerical schemes which are used to solve the discrete Boltzmann equation. Unlike the commonly used lattice Boltzmann method, the spatial and time steps are uncoupled in the OLB method. In the currently proposed schemes, which can be broadly classified into Runge-Kutta-based and characteristics-based, the size of the time-step is limited due to nu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.00515v1-abstract-full').style.display = 'inline'; document.getElementById('1501.00515v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1501.00515v1-abstract-full" style="display: none;"> The off-lattice Boltzmann (OLB) method consists of numerical schemes which are used to solve the discrete Boltzmann equation. Unlike the commonly used lattice Boltzmann method, the spatial and time steps are uncoupled in the OLB method. In the currently proposed schemes, which can be broadly classified into Runge-Kutta-based and characteristics-based, the size of the time-step is limited due to numerical stability constraints. In this work, we systematically compare the numerical stability of the proposed schemes in terms of the maximum stable time-step. In line with the overall LB method, we investigate the available schemes where the advection approximation is explicit, and the collision approximation is either explicit or implicit. The comparison is done by implementing these schemes on benchmark incompressible flow problems such as Taylor vortex flow, Poiseuille flow and, lid-driven cavity flow. It is found that the characteristics-based OLB schemes are numerically more stable than the Runge-Kutta-based schemes. Additionally, we have observed that, with respect to time-step size, the scheme proposed by Bardow et al. [1] is the most numerically stable and computationally efficient scheme compared to similar schemes, for the flow problems tested here. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.00515v1-abstract-full').style.display = 'none'; document.getElementById('1501.00515v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1108.5079">arXiv:1108.5079</a> <span> [<a href="https://arxiv.org/pdf/1108.5079">pdf</a>, <a href="https://arxiv.org/ps/1108.5079">ps</a>, <a href="https://arxiv.org/format/1108.5079">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="General Physics">physics.gen-ph</span> </div> </div> <p class="title is-5 mathjax"> A Quantum Mechanical Travelling Salesman </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R+N">Ravindra N. Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1108.5079v1-abstract-short" style="display: inline;"> A quantum simulation of a travelling salesman is described. A vector space for a graph is defined together with a sequence of operators which transform a special initial state into a superposition states representing Hamiltonian tours. The quantum amplitude for any tour is a function of the classical cost of travelling along the edges in that tour. Tours with the largest quantum amplitude may be d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.5079v1-abstract-full').style.display = 'inline'; document.getElementById('1108.5079v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1108.5079v1-abstract-full" style="display: none;"> A quantum simulation of a travelling salesman is described. A vector space for a graph is defined together with a sequence of operators which transform a special initial state into a superposition states representing Hamiltonian tours. The quantum amplitude for any tour is a function of the classical cost of travelling along the edges in that tour. Tours with the largest quantum amplitude may be different than those with the smallest classically-computed cost. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.5079v1-abstract-full').style.display = 'none'; document.getElementById('1108.5079v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1108.3502">arXiv:1108.3502</a> <span> [<a href="https://arxiv.org/pdf/1108.3502">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.84.113406">10.1103/PhysRevB.84.113406 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multiphonon Raman Scattering in Graphene </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+R">Rahul Rao</a>, <a href="/search/physics?searchtype=author&query=Tishler%2C+D">Derek Tishler</a>, <a href="/search/physics?searchtype=author&query=Katoch%2C+J">Jyoti Katoch</a>, <a href="/search/physics?searchtype=author&query=Ishigami%2C+M">Masa Ishigami</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1108.3502v1-abstract-short" style="display: inline;"> We report multiphonon Raman scattering in graphene samples. Higher order combination modes involving 3 phonons and 4 phonons are observed in single-layer (SLG), bi-layer (BLG), and few layer (FLG) graphene samples prepared by mechanical exfoliation. The intensity of the higher order phonon modes (relative to the G peak) is highest in SLG and decreases with increasing layers. In addition, all highe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.3502v1-abstract-full').style.display = 'inline'; document.getElementById('1108.3502v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1108.3502v1-abstract-full" style="display: none;"> We report multiphonon Raman scattering in graphene samples. Higher order combination modes involving 3 phonons and 4 phonons are observed in single-layer (SLG), bi-layer (BLG), and few layer (FLG) graphene samples prepared by mechanical exfoliation. The intensity of the higher order phonon modes (relative to the G peak) is highest in SLG and decreases with increasing layers. In addition, all higher order modes are observed to upshift in frequency almost linearly with increasing graphene layers, betraying the underlying interlayer van der Waals interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.3502v1-abstract-full').style.display = 'none'; document.getElementById('1108.3502v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication in Phys. Rev. B</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1105.0427">arXiv:1105.0427</a> <span> [<a href="https://arxiv.org/pdf/1105.0427">pdf</a>, <a href="https://arxiv.org/format/1105.0427">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0004-637X/745/2/115">10.1088/0004-637X/745/2/115 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Circular Polarization of Sagittarius A* at Submillimeter Wavelengths </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mu%C3%B1oz%2C+D+J">Diego J. Mu帽oz</a>, <a href="/search/physics?searchtype=author&query=Marrone%2C+D+P">Daniel P. Marrone</a>, <a href="/search/physics?searchtype=author&query=Moran%2C+J+M">James M. Moran</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+R">Ramprasad Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1105.0427v2-abstract-short" style="display: inline;"> We report the first detections of circularly polarized emission at submillimeter wavelengths from the compact radio source and supermassive black hole candidate Sgr A* at a level of 1.2\pm0.3% at 1.3 mm wavelength (230 GHz) and 1.6\pm0.3% at 860 microns (345 GHz) with the same handedness as observed at lower frequencies (1.4-15 GHz). The observations, taken with the Submillimeter Array in multiple… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1105.0427v2-abstract-full').style.display = 'inline'; document.getElementById('1105.0427v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1105.0427v2-abstract-full" style="display: none;"> We report the first detections of circularly polarized emission at submillimeter wavelengths from the compact radio source and supermassive black hole candidate Sgr A* at a level of 1.2\pm0.3% at 1.3 mm wavelength (230 GHz) and 1.6\pm0.3% at 860 microns (345 GHz) with the same handedness as observed at lower frequencies (1.4-15 GHz). The observations, taken with the Submillimeter Array in multiple epochs, also show simultaneous linear polarization (LP) at both wavelengths of about 6%. These properties differ sharply from those at wavelengths longer than 1 cm (frequencies below 30 GHz), where weak circular polarization (CP) (~ 0.5%) dominates over LP, which is not detected at similar fractional limits. We describe an extensive set of tests to ensure the accuracy of our measurements. We find no CP in any other source, including the bright quasar 1924-292, which traces the same path on the sky as Sgr A* and therefore should be subject to identical systematic errors originating in the instrument frame. Since a relativistic synchrotron plasma is expected to produce little CP, the observed CP is probably generated close to the event horizon by the Faraday conversion process. We use a simple model to show that the phase shift associated with Faraday conversion can be nearly independent of frequency, a sufficient condition to make the handedness of CP independent of frequency. Because the size of the tau=1-surface changes by more than an order of magnitude between 1.4 and 345 GHz, the magnetic field must be coherent over such scales to consistently produce left CP. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1105.0427v2-abstract-full').style.display = 'none'; document.getElementById('1105.0427v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 May, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13, pages, 6 figures, 5 tables. Accepted for publication in ApJ</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1102.3793">arXiv:1102.3793</a> <span> [<a href="https://arxiv.org/pdf/1102.3793">pdf</a>, <a href="https://arxiv.org/format/1102.3793">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantitative Methods">q-bio.QM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/bs.host.2017.07.005">10.1016/bs.host.2017.07.005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Theoretical Framework and Empirical Modeling for Time Required to Vaccinate a Population in an Epidemic </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rao%2C+A+S+R+S">Arni S. R. Srinivasa Rao</a>, <a href="/search/physics?searchtype=author&query=Kurien%2C+T">Thomas Kurien</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1102.3793v1-abstract-short" style="display: inline;"> The paper describes a method to understand time required to vaccinate against viruses in total as well as subpopulations. As a demonstration, a model based estimate for time required to vaccinate H1N1 in India, given its administrative difficulties is provided. We have proved novel theorems for the time functions defined in the paper. Such results are useful in planning for future epidemics. The n… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1102.3793v1-abstract-full').style.display = 'inline'; document.getElementById('1102.3793v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1102.3793v1-abstract-full" style="display: none;"> The paper describes a method to understand time required to vaccinate against viruses in total as well as subpopulations. As a demonstration, a model based estimate for time required to vaccinate H1N1 in India, given its administrative difficulties is provided. We have proved novel theorems for the time functions defined in the paper. Such results are useful in planning for future epidemics. The number of days required to vaccinate entire high risk population in three subpopulations (villages, tehsils and towns) are noted to be 84, 89 and 88 respectively. There exists state wise disparities in the health infrastructure and capacities to deliver vaccines and hence national estimates need to be re-evaluated based on individual performances in the states. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1102.3793v1-abstract-full').style.display = 'none'; document.getElementById('1102.3793v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 February, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 1 Table, 5 Figures (A preliminary draft)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 92D30; 60E05; 26D07 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Handbook of Statistics (2017), Volume 37 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0905.2852">arXiv:0905.2852</a> <span> [<a href="https://arxiv.org/pdf/0905.2852">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1080/17458080903115379">10.1080/17458080903115379 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> NO2 and Humidity Sensing Characteristics of Few-layer Graphene </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ghosh%2C+A">Anupama Ghosh</a>, <a href="/search/physics?searchtype=author&query=Late%2C+D+J">Dattatray J. Late</a>, <a href="/search/physics?searchtype=author&query=Panchakarla%2C+L+S">L. S. Panchakarla</a>, <a href="/search/physics?searchtype=author&query=Govindaraj%2C+A">A. Govindaraj</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+C+N+R">C. N. R. Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0905.2852v1-abstract-short" style="display: inline;"> Sensing characteristics of few-layer graphenes for NO2 and humidity have been investigated with graphene samples prepared by the thermal exfoliation of graphitic oxide (EG), conversion of nanodiamond (DG) and arc-discharge of graphite in hydrogen (HG). The sensitivity for NO2 is found to be highest with DG. Nitrogen-doped HG (n-type) shows increased sensitivity for NO2 compared to pure HG. The h… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0905.2852v1-abstract-full').style.display = 'inline'; document.getElementById('0905.2852v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0905.2852v1-abstract-full" style="display: none;"> Sensing characteristics of few-layer graphenes for NO2 and humidity have been investigated with graphene samples prepared by the thermal exfoliation of graphitic oxide (EG), conversion of nanodiamond (DG) and arc-discharge of graphite in hydrogen (HG). The sensitivity for NO2 is found to be highest with DG. Nitrogen-doped HG (n-type) shows increased sensitivity for NO2 compared to pure HG. The highest sensitivity for humidity is observed with HG. The sensing characteristics of graphene have been examined for different aliphatic alcohols and the sensitivity is found to vary with the chain length and branching. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0905.2852v1-abstract-full').style.display = 'none'; document.getElementById('0905.2852v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 May, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 7 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0904.2739">arXiv:0904.2739</a> <span> [<a href="https://arxiv.org/pdf/0904.2739">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Novel magnetic properties of graphene: Presence of both ferromagnetic and antiferromagnetic features and other aspects </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Matte%2C+H+S+S+R">H. S. S. Ramakrishna Matte</a>, <a href="/search/physics?searchtype=author&query=Subrahmanyam%2C+K+S">K. S. Subrahmanyam</a>, <a href="/search/physics?searchtype=author&query=Rao%2C+C+N+R">C. N. R. Rao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0904.2739v1-abstract-short" style="display: inline;"> Investigations of the magnetic properties of graphenes prepared by different methods reveal that dominant ferromagnetic interactions coexist along with antiferromagnetic interactions in all the samples. Thus, all the graphene samples exhibit room-temperature magnetic hysteresis. The magnetic properties depend on the number of layers and the sample area, small values of both favoring larger magne… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0904.2739v1-abstract-full').style.display = 'inline'; document.getElementById('0904.2739v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0904.2739v1-abstract-full" style="display: none;"> Investigations of the magnetic properties of graphenes prepared by different methods reveal that dominant ferromagnetic interactions coexist along with antiferromagnetic interactions in all the samples. Thus, all the graphene samples exhibit room-temperature magnetic hysteresis. The magnetic properties depend on the number of layers and the sample area, small values of both favoring larger magnetization. Molecular charge-transfer affects the magnetic properties of graphene, interaction with a donor molecule such as tetrathiafulvalene having greater effect than an electron-withdrawing molecule such as tetracyanoethylene <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0904.2739v1-abstract-full').style.display = 'none'; document.getElementById('0904.2739v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 April, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pges, 5 figures</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a 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