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</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/2411.06130">arXiv:2411.06130</a> <span> [<a href="https://arxiv.org/pdf/2411.06130">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="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Glucose Sensing Using Pristine and Co-doped Hematite Fiber-Optic sensors: Experimental and DFT Analysis </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Pattanayak%2C+N">Namrata Pattanayak</a>, <a href="/search/physics?searchtype=author&query=Das%2C+P">Preeti Das</a>, <a href="/search/physics?searchtype=author&query=Sahoo%2C+M+R">Mihir Ranjan Sahoo</a>, <a href="/search/physics?searchtype=author&query=Panda%2C+P">Padmalochan Panda</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+M">Monalisa Pradhan</a>, <a href="/search/physics?searchtype=author&query=Pradhan%2C+K">Kalpataru Pradhan</a>, <a href="/search/physics?searchtype=author&query=Nayak%2C+R">Reshma Nayak</a>, <a href="/search/physics?searchtype=author&query=Patnaik%2C+S+K">Sumanta Kumar Patnaik</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">Sukanta Kumar Tripathy</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="2411.06130v1-abstract-short" style="display: inline;"> Glucose monitoring plays a critical role in managing diabetes, one of the most prevalent diseases globally. The development of fast-responsive, cost-effective, and biocompatible glucose sensors is essential for improving patient care. In this study, a comparative analysis is conducted between pristine and Co-doped hematite samples, synthesized via the hydrothermal method, to evaluate their structu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.06130v1-abstract-full').style.display = 'inline'; document.getElementById('2411.06130v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.06130v1-abstract-full" style="display: none;"> Glucose monitoring plays a critical role in managing diabetes, one of the most prevalent diseases globally. The development of fast-responsive, cost-effective, and biocompatible glucose sensors is essential for improving patient care. In this study, a comparative analysis is conducted between pristine and Co-doped hematite samples, synthesized via the hydrothermal method, to evaluate their structural, morphological, and optical properties. The glucose sensing performance of both samples is assessed using a fiber-optic evanescent wave (FOEW) setup. While the sensitivity remains comparable for both pristine and Co-doped hematite, a reduction in the Limit of Detection (LoD) is observed in the Co-doped sample, suggesting enhanced interactions with glucose molecules at the surface. To gain further insights into the glucose adsorption mechanisms, Density Functional Theory (DFT) calculations are performed, revealing key details regarding charge transfer, electronic delocalization, and glucose binding on the hematite surfaces. These findings highlight the potential of Co-doped hematite for advanced glucose sensing applications, offering a valuable synergy between experimental and theoretical approaches for further exploration in biosensing technologies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.06130v1-abstract-full').style.display = 'none'; document.getElementById('2411.06130v1-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.20033">arXiv:2405.20033</a> <span> [<a href="https://arxiv.org/pdf/2405.20033">pdf</a>, <a href="https://arxiv.org/format/2405.20033">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> </div> </div> <p class="title is-5 mathjax"> Chemical Space-Informed Machine Learning Models for Rapid Predictions of X-ray Photoelectron Spectra of Organic Molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Susmita Tripathy</a>, <a href="/search/physics?searchtype=author&query=Das%2C+S">Surajit Das</a>, <a href="/search/physics?searchtype=author&query=Jindal%2C+S">Shweta Jindal</a>, <a href="/search/physics?searchtype=author&query=Ramakrishnan%2C+R">Raghunathan Ramakrishnan</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="2405.20033v2-abstract-short" style="display: inline;"> We present machine learning models based on kernel-ridge regression for predicting X-ray photoelectron spectra of organic molecules originating from the $K$-shell ionization energies of carbon (C), nitrogen (N), oxygen (O), and fluorine (F) atoms. We constructed the training dataset through high-throughput calculations of $K$-shell core-electron binding energies (CEBEs) for 12,880 small organic mo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.20033v2-abstract-full').style.display = 'inline'; document.getElementById('2405.20033v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.20033v2-abstract-full" style="display: none;"> We present machine learning models based on kernel-ridge regression for predicting X-ray photoelectron spectra of organic molecules originating from the $K$-shell ionization energies of carbon (C), nitrogen (N), oxygen (O), and fluorine (F) atoms. We constructed the training dataset through high-throughput calculations of $K$-shell core-electron binding energies (CEBEs) for 12,880 small organic molecules in the bigQM7$蠅$ dataset, employing the $螖$-SCF formalism coupled with meta-GGA-DFT and a variationally converged basis set. The models are cost-effective, as they require the atomic coordinates of a molecule generated using universal force fields while estimating the target-level CEBEs corresponding to DFT-level equilibrium geometry. We explore transfer learning by utilizing the atomic environment feature vectors learned using a graph neural network framework in kernel-ridge regression. Additionally, we enhance accuracy within the $螖$-machine learning framework by leveraging inexpensive baseline spectra derived from Kohn--Sham eigenvalues. When applied to 208 combinatorially substituted uracil molecules larger than those in the training set, our analyses suggest that the models may not provide quantitatively accurate predictions of CEBEs but offer a strong linear correlation relevant for virtual high-throughput screening. We present the dataset and models as the Python module, ${\tt cebeconf}$, to facilitate further explorations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.20033v2-abstract-full').style.display = 'none'; document.getElementById('2405.20033v2-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> 15 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 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">Major Revision, New Figures and Tables added in the SI, Figures 1 and 4 revised</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.04632">arXiv:2405.04632</a> <span> [<a href="https://arxiv.org/pdf/2405.04632">pdf</a>, <a href="https://arxiv.org/format/2405.04632">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-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/10.18429/JACoW-IPAC2023-THPA075">10.18429/JACoW-IPAC2023-THPA075 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Synchronization and Phase Locking of Resonant Magnet Power Supplies For Mu2e Experiment at Fermilab </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Hensley%2C+R">Ryan Hensley</a>, <a href="/search/physics?searchtype=author&query=Prebys%2C+E">Eric Prebys</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</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="2405.04632v1-abstract-short" style="display: inline;"> The Muon-to-Electron Conversion (Mu2e) Experiment demands a highly precise magnet and collimator system to achieve a stringent extinction level of $1\times 10^{-10}$ for out-of-time beam particles. Extinction is ensured by an AC Dipole system consisting of two magnet components: a 295 kHz system to allow for the passage of a 590 kHz beam at the nodes, and a 4.42 MHz system to minimize in-time beam… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.04632v1-abstract-full').style.display = 'inline'; document.getElementById('2405.04632v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.04632v1-abstract-full" style="display: none;"> The Muon-to-Electron Conversion (Mu2e) Experiment demands a highly precise magnet and collimator system to achieve a stringent extinction level of $1\times 10^{-10}$ for out-of-time beam particles. Extinction is ensured by an AC Dipole system consisting of two magnet components: a 295 kHz system to allow for the passage of a 590 kHz beam at the nodes, and a 4.42 MHz system to minimize in-time beam slewing. Both components must be accurately phase-locked to the Delivery Ring's bunch rate as well as be synchronized with beam transfers from the Recycler. In this paper, we present the design, implementation, and results of a control system for the Mu2e magnet system based on an Intel Arria 10 FPGA. This system handles the phase-locking of the magnets to the Delivery Ring, as well as the phase jumps required for synchronization with transfers from the Recycler. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.04632v1-abstract-full').style.display = 'none'; document.getElementById('2405.04632v1-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, 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">3 pages, 4 figures; 14th International Particle Accelerator Conference (IPAC'23)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JACoW IPAC2023 (2023) THPA075 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.05933">arXiv:2309.05933</a> <span> [<a href="https://arxiv.org/pdf/2309.05933">pdf</a>, <a href="https://arxiv.org/format/2309.05933">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 Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Workshop on a future muon program at FNAL </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Corrodi%2C+S">S. Corrodi</a>, <a href="/search/physics?searchtype=author&query=Oksuzian%2C+Y">Y. Oksuzian</a>, <a href="/search/physics?searchtype=author&query=Edmonds%2C+A">A. Edmonds</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+J">J. Miller</a>, <a href="/search/physics?searchtype=author&query=Tran%2C+H+N">H. N. Tran</a>, <a href="/search/physics?searchtype=author&query=Bonventre%2C+R">R. Bonventre</a>, <a href="/search/physics?searchtype=author&query=Brown%2C+D+N">D. N. Brown</a>, <a href="/search/physics?searchtype=author&query=Meot%2C+F">F. Meot</a>, <a href="/search/physics?searchtype=author&query=Singh%2C+V">V. Singh</a>, <a href="/search/physics?searchtype=author&query=Kolomensky%2C+Y">Y. Kolomensky</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">S. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Borrel%2C+L">L. Borrel</a>, <a href="/search/physics?searchtype=author&query=Bub%2C+M">M. Bub</a>, <a href="/search/physics?searchtype=author&query=Echenard%2C+B">B. Echenard</a>, <a href="/search/physics?searchtype=author&query=Hitlin%2C+D+G">D. G. Hitlin</a>, <a href="/search/physics?searchtype=author&query=Jafree%2C+H">H. Jafree</a>, <a href="/search/physics?searchtype=author&query=Middleton%2C+S">S. Middleton</a>, <a href="/search/physics?searchtype=author&query=Plestid%2C+R">R. Plestid</a>, <a href="/search/physics?searchtype=author&query=Porter%2C+F+C">F. C. Porter</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+R+Y">R. Y. Zhu</a>, <a href="/search/physics?searchtype=author&query=Bottura%2C+L">L. Bottura</a>, <a href="/search/physics?searchtype=author&query=Pinsard%2C+E">E. Pinsard</a>, <a href="/search/physics?searchtype=author&query=Teixeira%2C+A+M">A. M. Teixeira</a>, <a href="/search/physics?searchtype=author&query=Carelli%2C+C">C. Carelli</a>, <a href="/search/physics?searchtype=author&query=Ambrose%2C+D">D. Ambrose</a> , et al. (68 additional authors not shown) </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="2309.05933v1-abstract-short" style="display: inline;"> The Snowmass report on rare processes and precision measurements recommended Mu2e-II and a next generation muon facility at Fermilab (Advanced Muon Facility) as priorities for the frontier. The Workshop on a future muon program at FNAL was held in March 2023 to discuss design studies for Mu2e-II, organizing efforts for the next generation muon facility, and identify synergies with other efforts (e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.05933v1-abstract-full').style.display = 'inline'; document.getElementById('2309.05933v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.05933v1-abstract-full" style="display: none;"> The Snowmass report on rare processes and precision measurements recommended Mu2e-II and a next generation muon facility at Fermilab (Advanced Muon Facility) as priorities for the frontier. The Workshop on a future muon program at FNAL was held in March 2023 to discuss design studies for Mu2e-II, organizing efforts for the next generation muon facility, and identify synergies with other efforts (e.g., muon collider). Topics included high-power targetry, status of R&D for Mu2e-II, development of compressor rings, FFA and concepts for muon experiments (conversion, decays, muonium and other opportunities) at AMF. This document summarizes the workshop discussions with a focus on future R&D tasks needed to realize these concepts. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.05933v1-abstract-full').style.display = 'none'; document.getElementById('2309.05933v1-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 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">68 pages, 36 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-CONF-23-464-PPD, CALT-TH-2023-036 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.09770">arXiv:2306.09770</a> <span> [<a href="https://arxiv.org/pdf/2306.09770">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atmospheric and Oceanic Physics">physics.ao-ph</span> </div> </div> <p class="title is-5 mathjax"> Analysis of Mumbai Floods in recent Years with Crowdsourced Data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+S">Shrabani Sailaja Tripathy</a>, <a href="/search/physics?searchtype=author&query=Chaudhuri%2C+S">Sautrik Chaudhuri</a>, <a href="/search/physics?searchtype=author&query=Murtugudde%2C+R">Raghu Murtugudde</a>, <a href="/search/physics?searchtype=author&query=Mharte%2C+V">Vedant Mharte</a>, <a href="/search/physics?searchtype=author&query=Parmar%2C+D">Dulari Parmar</a>, <a href="/search/physics?searchtype=author&query=Pinto%2C+M">Manasi Pinto</a>, <a href="/search/physics?searchtype=author&query=Zope%2C+P+E">P. E. Zope</a>, <a href="/search/physics?searchtype=author&query=Dixit%2C+V">Vishal Dixit</a>, <a href="/search/physics?searchtype=author&query=Ghosh%2C+S">Subimal Ghosh</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="2306.09770v1-abstract-short" style="display: inline;"> Mumbai, a densely populated city, experiences frequent extreme rainfall events leading to floods and waterlogging. However, the lack of real-time flood monitoring and detailed past flooding data limits the scientific analysis to extreme rainfall assessment. To address this, we explore the usability of crowdsourced data for identifying flood hotspots and extracting reliable flood information from t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.09770v1-abstract-full').style.display = 'inline'; document.getElementById('2306.09770v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.09770v1-abstract-full" style="display: none;"> Mumbai, a densely populated city, experiences frequent extreme rainfall events leading to floods and waterlogging. However, the lack of real-time flood monitoring and detailed past flooding data limits the scientific analysis to extreme rainfall assessment. To address this, we explore the usability of crowdsourced data for identifying flood hotspots and extracting reliable flood information from the past. Through an automated program, we filter and retrieve flood-related data from Twitter, using location information to generate flood maps for past heavy rainfall events. The validity of the retrieved data is confirmed by comparing it with volunteered geographic information (VGI) which is more accurate but less abundant. In the absence of direct flood information, Twitter data is cross-verified with the Height above the Nearest Drainage (HAND) map, which serves as a proxy for elevation. Interestingly, while extreme rainfall events are increasing in frequency, recent Twitter-based information shows a decrease in flood reporting, attributed to effective mitigation measures implemented at various flood hotspots. Local surveys support this finding and highlight measures such as underground storage tanks and pumping stations that have reduced flood severity. Our study demonstrates the value of crowdsourced data in identifying urban flood hotspots and its potential for real-time flood monitoring and forecasting. This approach can be adapted for data-sparse urban regions to generate location-specific warnings, contributing to improved early warnings and mitigating the impact on lives and property. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.09770v1-abstract-full').style.display = 'none'; document.getElementById('2306.09770v1-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 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.17395">arXiv:2305.17395</a> <span> [<a href="https://arxiv.org/pdf/2305.17395">pdf</a>, <a href="https://arxiv.org/format/2305.17395">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Data acquisition system for muon tracking in a muon scattering tomography setup </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Das%2C+S">Subhendu Das</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Datta%2C+J">Jaydeep Datta</a>, <a href="/search/physics?searchtype=author&query=Sarkar%2C+S">Sandip Sarkar</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</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="2305.17395v1-abstract-short" style="display: inline;"> We report here the development of a multi-channel DAQ system for muon tracking in a muon scattering tomography setup. The salient features of the proposed DAQ system are direct acquisition and processing of LVDS signals, 500 MHz sampling frequency and scalability. It consists of front-end electronics stage built around NINO ASIC. The back-end electronics is configured with Intel/Altera MAX-10 FPGA… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.17395v1-abstract-full').style.display = 'inline'; document.getElementById('2305.17395v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.17395v1-abstract-full" style="display: none;"> We report here the development of a multi-channel DAQ system for muon tracking in a muon scattering tomography setup. The salient features of the proposed DAQ system are direct acquisition and processing of LVDS signals, 500 MHz sampling frequency and scalability. It consists of front-end electronics stage built around NINO ASIC. The back-end electronics is configured with Intel/Altera MAX-10 FPGA development board which transmits data to the storage following UART protocol. The proposed DAQ system has been tested for its performance using a position sensitive glass RPC detector with two-dimensional 8X8 readout strip configuration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.17395v1-abstract-full').style.display = 'none'; document.getElementById('2305.17395v1-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.02895">arXiv:2303.02895</a> <span> [<a href="https://arxiv.org/pdf/2303.02895">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Space Physics">physics.space-ph</span> </div> </div> <p class="title is-5 mathjax"> The Multiview Observatory for Solar Terrestrial Science (MOST) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gopalswamy%2C+N">N. Gopalswamy</a>, <a href="/search/physics?searchtype=author&query=Christe%2C+S">S. Christe</a>, <a href="/search/physics?searchtype=author&query=Fung%2C+S+F">S. F. Fung</a>, <a href="/search/physics?searchtype=author&query=Gong%2C+Q">Q. Gong</a>, <a href="/search/physics?searchtype=author&query=Gruesbeck%2C+J+R">J. R. Gruesbeck</a>, <a href="/search/physics?searchtype=author&query=Jian%2C+L+K">L. K. Jian</a>, <a href="/search/physics?searchtype=author&query=Kanekal%2C+S+G">S. G. Kanekal</a>, <a href="/search/physics?searchtype=author&query=Kay%2C+C">C. Kay</a>, <a href="/search/physics?searchtype=author&query=Kucera%2C+T+A">T. A. Kucera</a>, <a href="/search/physics?searchtype=author&query=Leake%2C+J+E">J. E. Leake</a>, <a href="/search/physics?searchtype=author&query=Li%2C+L">L. Li</a>, <a href="/search/physics?searchtype=author&query=Makela%2C+P">P. Makela</a>, <a href="/search/physics?searchtype=author&query=Nikulla%2C+P">P. Nikulla</a>, <a href="/search/physics?searchtype=author&query=Reginald%2C+N+L">N. L. Reginald</a>, <a href="/search/physics?searchtype=author&query=Shih%2C+A">A. Shih</a>, <a href="/search/physics?searchtype=author&query=Tadikonda%2C+S+K">S. K. Tadikonda</a>, <a href="/search/physics?searchtype=author&query=Viall%2C+N">N. Viall</a>, <a href="/search/physics?searchtype=author&query=Wilson%2C+L+B">L. B. Wilson III</a>, <a href="/search/physics?searchtype=author&query=Yashiro%2C+S">S. Yashiro</a>, <a href="/search/physics?searchtype=author&query=Golub%2C+L">L. Golub</a>, <a href="/search/physics?searchtype=author&query=DeLuca%2C+E">E. DeLuca</a>, <a href="/search/physics?searchtype=author&query=Reeves%2C+K">K. Reeves</a>, <a href="/search/physics?searchtype=author&query=Sterling%2C+A+C">A. C. Sterling</a>, <a href="/search/physics?searchtype=author&query=Winebarger%2C+A+R">A. R. Winebarger</a>, <a href="/search/physics?searchtype=author&query=DeForest%2C+C">C. DeForest</a> , et al. (32 additional authors not shown) </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="2303.02895v3-abstract-short" style="display: inline;"> We report on a study of the Multiview Observatory for Solar Terrestrial Science (MOST) mission that will provide comprehensive imagery and time series data needed to understand the magnetic connection between the solar interior and the solar atmosphere/inner heliosphere. MOST will build upon the successes of SOHO and STEREO missions with new views of the Sun and enhanced instrument capabilities. T… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.02895v3-abstract-full').style.display = 'inline'; document.getElementById('2303.02895v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.02895v3-abstract-full" style="display: none;"> We report on a study of the Multiview Observatory for Solar Terrestrial Science (MOST) mission that will provide comprehensive imagery and time series data needed to understand the magnetic connection between the solar interior and the solar atmosphere/inner heliosphere. MOST will build upon the successes of SOHO and STEREO missions with new views of the Sun and enhanced instrument capabilities. This article is based on a study conducted at NASA Goddard Space Flight Center that determined the required instrument refinement, spacecraft accommodation, launch configuration, and flight dynamics for mission success. MOST is envisioned as the next generation great observatory positioned to obtain three-dimensional information of large-scale heliospheric structures such as coronal mass ejections, stream interaction regions, and the solar wind itself. The MOST mission consists of 2 pairs of spacecraft located in the vicinity of Sun-Earth Lagrange points L4 (MOST1, MOST3) and L5 (MOST2 and MOST4). The spacecraft stationed at L4 (MOST1) and L5 (MOST2) will each carry seven remote-sensing and three in-situ instrument suites, including a novel radio package known as the Faraday Effect Tracker of Coronal and Heliospheric structures (FETCH). MOST3 and MOST4 will carry only the FETCH instruments and are positioned at variable locations along the Earth orbit up to 20掳 ahead of L4 and 20掳 behind L5, respectively. FETCH will have polarized radio transmitters and receivers on all four spacecraft to measure the magnetic content of solar wind structures propagating from the Sun to Earth using the Faraday rotation technique. The MOST mission will be able to sample the magnetized plasma throughout the Sun-Earth connected space during the mission lifetime over a solar cycle. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.02895v3-abstract-full').style.display = 'none'; document.getElementById('2303.02895v3-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 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">42 pages, 19 figures, 8 tables, to appear in J. Atmospheric and Solar Terrestrial Physics</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.13244">arXiv:2210.13244</a> <span> [<a href="https://arxiv.org/pdf/2210.13244">pdf</a>, <a href="https://arxiv.org/format/2210.13244">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Understanding the direct detection of charged particles with SiPMs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Carnesecchi%2C+F">F. Carnesecchi</a>, <a href="/search/physics?searchtype=author&query=Vignola%2C+G">G. Vignola</a>, <a href="/search/physics?searchtype=author&query=Agrawal%2C+N">N. Agrawal</a>, <a href="/search/physics?searchtype=author&query=Alici%2C+A">A. Alici</a>, <a href="/search/physics?searchtype=author&query=Antonioli%2C+P">P. Antonioli</a>, <a href="/search/physics?searchtype=author&query=Arcelli%2C+S">S. Arcelli</a>, <a href="/search/physics?searchtype=author&query=Bellini%2C+F">F. Bellini</a>, <a href="/search/physics?searchtype=author&query=Cavazza%2C+D">D. Cavazza</a>, <a href="/search/physics?searchtype=author&query=Cifarelli%2C+L">L. Cifarelli</a>, <a href="/search/physics?searchtype=author&query=Colocci%2C+M">M. Colocci</a>, <a href="/search/physics?searchtype=author&query=Durando%2C+S">S. Durando</a>, <a href="/search/physics?searchtype=author&query=Ercolessi%2C+F">F. Ercolessi</a>, <a href="/search/physics?searchtype=author&query=Ficorella%2C+A">A. Ficorella</a>, <a href="/search/physics?searchtype=author&query=Fraticelli%2C+C">C. Fraticelli</a>, <a href="/search/physics?searchtype=author&query=Garbini%2C+M">M. Garbini</a>, <a href="/search/physics?searchtype=author&query=Giacalone%2C+M">M. Giacalone</a>, <a href="/search/physics?searchtype=author&query=Gola%2C+A">A. Gola</a>, <a href="/search/physics?searchtype=author&query=Hatzifotiadou%2C+D">D. Hatzifotiadou</a>, <a href="/search/physics?searchtype=author&query=Jacazio%2C+N">N. Jacazio</a>, <a href="/search/physics?searchtype=author&query=Margotti%2C+A">A. Margotti</a>, <a href="/search/physics?searchtype=author&query=Malfattore%2C+G">G. Malfattore</a>, <a href="/search/physics?searchtype=author&query=Nania%2C+R">R. Nania</a>, <a href="/search/physics?searchtype=author&query=Noferini%2C+F">F. Noferini</a>, <a href="/search/physics?searchtype=author&query=Paternoster%2C+G">G. Paternoster</a>, <a href="/search/physics?searchtype=author&query=Pinazza%2C+O">O. Pinazza</a> , et al. (11 additional authors not shown) </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="2210.13244v1-abstract-short" style="display: inline;"> In this paper evidence that the increased response of SiPM sensors to the passage of charged particles is related mainly to Cherenkov light produced in the protection layer is reported. The response and timing properties of sensors with different protection layers have been studied. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.13244v1-abstract-full" style="display: none;"> In this paper evidence that the increased response of SiPM sensors to the passage of charged particles is related mainly to Cherenkov light produced in the protection layer is reported. The response and timing properties of sensors with different protection layers have been studied. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.13244v1-abstract-full').style.display = 'none'; document.getElementById('2210.13244v1-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 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.15966">arXiv:2205.15966</a> <span> [<a href="https://arxiv.org/pdf/2205.15966">pdf</a>, <a href="https://arxiv.org/format/2205.15966">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 Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> A Novel Readout Scheme for Muon Tomography Application in Material Identification </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Das%2C+S">Subhendu Das</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Sarkar%2C+S">Sandip Sarkar</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</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="2205.15966v1-abstract-short" style="display: inline;"> This work reports a cost-effective, multi-parameter readout and data-acquisition system for a muon scattering tomography system based on Resistive Plate Chambers (RPCs). Initial test measurements with a prototype Resistive Plate Chamber were performed using a low-cost FPGA coupled to the NINO ASIC for the event selection and handling data. The Time over-Threshold (TOT) property of NINO ASICs has b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.15966v1-abstract-full').style.display = 'inline'; document.getElementById('2205.15966v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.15966v1-abstract-full" style="display: none;"> This work reports a cost-effective, multi-parameter readout and data-acquisition system for a muon scattering tomography system based on Resistive Plate Chambers (RPCs). Initial test measurements with a prototype Resistive Plate Chamber were performed using a low-cost FPGA coupled to the NINO ASIC for the event selection and handling data. The Time over-Threshold (TOT) property of NINO ASICs has been used to achieve better position information and achieve precise tracking capability. In our test setup, we try to build an imaging setup using a single RPC and lead block, which covers some areas of RPC. A glass RPC of dimension 30cm x 30cm, filled with a gas mixture of 95% Freon and 5% Isobutane, equipped with two orthogonal panels of readout strips of width 3 cm and pitch 3.2 cm, has been operated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.15966v1-abstract-full').style.display = 'none'; document.getElementById('2205.15966v1-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 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.04160">arXiv:2202.04160</a> <span> [<a href="https://arxiv.org/pdf/2202.04160">pdf</a>, <a href="https://arxiv.org/format/2202.04160">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</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/10.1088/1748-0221/17/06/P06007">10.1088/1748-0221/17/06/P06007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Direct detection of charged particles with SiPMs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Carnesecchi%2C+F">F. Carnesecchi</a>, <a href="/search/physics?searchtype=author&query=Vignola%2C+G">G. Vignola</a>, <a href="/search/physics?searchtype=author&query=Agrawal%2C+N">N. Agrawal</a>, <a href="/search/physics?searchtype=author&query=Alici%2C+A">A. Alici</a>, <a href="/search/physics?searchtype=author&query=Antonioli%2C+P">P. Antonioli</a>, <a href="/search/physics?searchtype=author&query=Arcelli%2C+S">S. Arcelli</a>, <a href="/search/physics?searchtype=author&query=Bellini%2C+F">F. Bellini</a>, <a href="/search/physics?searchtype=author&query=Cavazza%2C+D">D. Cavazza</a>, <a href="/search/physics?searchtype=author&query=Cifarelli%2C+L">L. Cifarelli</a>, <a href="/search/physics?searchtype=author&query=Colocci%2C+M">M. Colocci</a>, <a href="/search/physics?searchtype=author&query=Durando%2C+S">S. Durando</a>, <a href="/search/physics?searchtype=author&query=Ercolessi%2C+F">F. Ercolessi</a>, <a href="/search/physics?searchtype=author&query=Garbini%2C+M">M. Garbini</a>, <a href="/search/physics?searchtype=author&query=Giacalone%2C+M">M. Giacalone</a>, <a href="/search/physics?searchtype=author&query=Hatzifotiadou%2C+D">D. Hatzifotiadou</a>, <a href="/search/physics?searchtype=author&query=Jacazio%2C+N">N. Jacazio</a>, <a href="/search/physics?searchtype=author&query=Margotti%2C+A">A. Margotti</a>, <a href="/search/physics?searchtype=author&query=Malfattore%2C+G">G. Malfattore</a>, <a href="/search/physics?searchtype=author&query=Nania%2C+R">R. Nania</a>, <a href="/search/physics?searchtype=author&query=Noferini%2C+F">F. Noferini</a>, <a href="/search/physics?searchtype=author&query=Pinazza%2C+O">O. Pinazza</a>, <a href="/search/physics?searchtype=author&query=Preghenella%2C+R">R. Preghenella</a>, <a href="/search/physics?searchtype=author&query=Ricci%2C+R">R. Ricci</a>, <a href="/search/physics?searchtype=author&query=Rignanese%2C+L">L. Rignanese</a>, <a href="/search/physics?searchtype=author&query=Rubini%2C+N">N. Rubini</a> , et al. (5 additional authors not shown) </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="2202.04160v2-abstract-short" style="display: inline;"> The direct response of Silicon PhotoMultipliers being traversed by a MIP charged particle have been studied in a systematic way for the first time. Using beam test data, time resolution and the crosstalk probability have been measured. A characterization of the SiPM by means of a laser beam is also reported. The results obtained for different sensors indicate a measured time resolution around 40-7… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.04160v2-abstract-full').style.display = 'inline'; document.getElementById('2202.04160v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.04160v2-abstract-full" style="display: none;"> The direct response of Silicon PhotoMultipliers being traversed by a MIP charged particle have been studied in a systematic way for the first time. Using beam test data, time resolution and the crosstalk probability have been measured. A characterization of the SiPM by means of a laser beam is also reported. The results obtained for different sensors indicate a measured time resolution around 40-70 ps. Although particles are expected to traverse only one SPAD per event, crosstalk measurements on different sensors indicate an unexpected higher value with respect to the one related to the sensor noise. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.04160v2-abstract-full').style.display = 'none'; document.getElementById('2202.04160v2-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 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 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">10 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/2103.01906">arXiv:2103.01906</a> <span> [<a href="https://arxiv.org/pdf/2103.01906">pdf</a>, <a href="https://arxiv.org/format/2103.01906">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</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/10.1088/1748-0221/16/07/P07012">10.1088/1748-0221/16/07/P07012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Numerical Qualification of Eco-Friendly Gas Mixtures for Avalanche-Mode Operation of Resistive Plate Chambers in INO-ICAL </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Datta%2C+J">Jaydeep Datta</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</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="2103.01906v2-abstract-short" style="display: inline;"> Numerical qualification of an eco-friendly alternative gas mixture for avalanche mode operation of Resistive Plate Chambers is the soul of this work. To identify the gas mixture, a numerical model developed elsewhere by the authors has been first established by comparing the simulated figure of merits (efficiency and streamer probability) with the experimental data for the gas mixture used in INO-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.01906v2-abstract-full').style.display = 'inline'; document.getElementById('2103.01906v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.01906v2-abstract-full" style="display: none;"> Numerical qualification of an eco-friendly alternative gas mixture for avalanche mode operation of Resistive Plate Chambers is the soul of this work. To identify the gas mixture, a numerical model developed elsewhere by the authors has been first established by comparing the simulated figure of merits (efficiency and streamer probability) with the experimental data for the gas mixture used in INO-ICAL. Then it has been used to simulate the same properties of a gas mixture based on argon, carbon di-oxide and nitrogen, identified as potential replacement by studying its different properties. Efficacy of this eco-friendly gas mixture has been studied by comparing the simulated result with the standard gas mixture used in INO-ICAL as well as with experimental data of other eco-friendly hydrofluorocarbon (HFO1234ze) based potential replacements. To increase the efficacy of the proposed gas mixture, studies of the traditional way (addition of a little amount of SF$_6$) and an alternative approach (exploring the option of high-end electronics) were carried out. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.01906v2-abstract-full').style.display = 'none'; document.getElementById('2103.01906v2-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> 3 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">16 pages, 9 figures, Accepted for publication at JINST</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.08913">arXiv:2102.08913</a> <span> [<a href="https://arxiv.org/pdf/2102.08913">pdf</a>, <a href="https://arxiv.org/format/2102.08913">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 Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Image and Video Processing">eess.IV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Numerical Evaluation of a muon tomography system for imaging defects in concrete structures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Datta%2C+J">Jaydeep Datta</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</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="2102.08913v2-abstract-short" style="display: inline;"> Among numerous applications of muon tomography, deployment in civil structures has caught attraction of many recently. In this work, the appropriateness of muon scattering tomography to detect defects in concrete structures has been studied numerically. A few basic concrete structures that are frequently used in civil construction, have been considered as test cases. A simulation has been performe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.08913v2-abstract-full').style.display = 'inline'; document.getElementById('2102.08913v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.08913v2-abstract-full" style="display: none;"> Among numerous applications of muon tomography, deployment in civil structures has caught attraction of many recently. In this work, the appropriateness of muon scattering tomography to detect defects in concrete structures has been studied numerically. A few basic concrete structures that are frequently used in civil construction, have been considered as test cases. A simulation has been performed on Geant4 platform where an imaging setup built with several gaseous ionization detectors, having a specific spatial resolution for tracking the muons, have been modeled. The images of the test cases with and without the defect have been simulated for a month-long exposure of cosmic muons on the basis of their scattering from the composite concrete structures. The images have been compared using t-test to evaluate the performance of the imaging setup in identifying the defects. Further processing of the images has been done with a pattern recognition method proposed in our earlier work to improve defect identification. The efficacy of the said method has been evaluated in terms of the PRM-score devised in this work. The limitation and advantages of the present application of the muon scattering tomography encompassing the imaging and image processing technique in non-destructive evaluation of concrete structures have been discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.08913v2-abstract-full').style.display = 'none'; document.getElementById('2102.08913v2-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> 22 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 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">Minimal Changes, submitted to EPJ plus</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.01386">arXiv:2010.01386</a> <span> [<a href="https://arxiv.org/pdf/2010.01386">pdf</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"> Flood Evacuation During Pandemic: A multi-objective Framework to Handle Compound Hazard </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+S">Shrabani S. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Bhatia%2C+U">Udit Bhatia</a>, <a href="/search/physics?searchtype=author&query=Mohanty%2C+M">Mohit Mohanty</a>, <a href="/search/physics?searchtype=author&query=Karmakar%2C+S">Subhankar Karmakar</a>, <a href="/search/physics?searchtype=author&query=Ghosh%2C+S">Subimal Ghosh</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="2010.01386v1-abstract-short" style="display: inline;"> The evacuation of the population from flood-affected regions is a non-structural measure to mitigate flood hazards. Shelters used for this purpose usually accommodate a large number of flood evacuees for a temporary period. Floods during pandemic result in a compound hazard. Evacuations under such situations are difficult to plan as social distancing is nearly impossible in the highly crowded shel… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.01386v1-abstract-full').style.display = 'inline'; document.getElementById('2010.01386v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.01386v1-abstract-full" style="display: none;"> The evacuation of the population from flood-affected regions is a non-structural measure to mitigate flood hazards. Shelters used for this purpose usually accommodate a large number of flood evacuees for a temporary period. Floods during pandemic result in a compound hazard. Evacuations under such situations are difficult to plan as social distancing is nearly impossible in the highly crowded shelters. This results in a multi-objective problem with conflicting objectives of maximizing the number of evacuees from flood-prone regions and minimizing the number of infections at the end of the shelter's stay. To the best of our knowledge, such a problem is yet to be explored in literature. Here we develop a simulation-optimization framework, where multiple objectives are handled with a max-min approach. The simulation model consists of an extended Susceptible Exposed Infectious Recovered Susceptible (SEIRS) model.We apply the proposed model to the flood-prone Jagatsinghpur district in the state of Odisha, India. We find that the proposed approach can provide an estimate of people required to be evacuated from individual flood-prone villages to reduce flood hazards during the pandemic. At the same time, this does not result in an uncontrolled number of new infections. The proposed approach can generalize to different regions and can provide a framework to stakeholders to manage conflicting objectives in disaster management planning and to handle compound hazards. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.01386v1-abstract-full').style.display = 'none'; document.getElementById('2010.01386v1-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> 3 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.13911">arXiv:2005.13911</a> <span> [<a href="https://arxiv.org/pdf/2005.13911">pdf</a>, <a href="https://arxiv.org/format/2005.13911">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</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/10.1088/1748-0221/15/12/C12006">10.1088/1748-0221/15/12/C12006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of Streamer Development in Resistive Plate Chamber </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Datta%2C+J">Jaydeep Datta</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</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="2005.13911v2-abstract-short" style="display: inline;"> This work has been carried out to simulate a Resistive Plate Chamber and corroborate it with experimental measurements in order to develop a numerical tool for studying the performance of the device for any gas mixture. This will allow us to explore the feasibility of operating these chambers in their avalanche mode within the Iron Calorimeter setup at India-based Neutrino Observatory with any eco… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.13911v2-abstract-full').style.display = 'inline'; document.getElementById('2005.13911v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.13911v2-abstract-full" style="display: none;"> This work has been carried out to simulate a Resistive Plate Chamber and corroborate it with experimental measurements in order to develop a numerical tool for studying the performance of the device for any gas mixture. This will allow us to explore the feasibility of operating these chambers in their avalanche mode within the Iron Calorimeter setup at India-based Neutrino Observatory with any eco-friendly substitute. The simulation has considered a hydrodynamic model of charge transport to emulate the electronic and ionic growths in the device as a function of the applied voltage which determines its working mode as either of the avalanche or streamer. In order to validate, the simulation result has been compared with compatible experimental data available in the literature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.13911v2-abstract-full').style.display = 'none'; document.getElementById('2005.13911v2-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 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">Accepted in JINST</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.14984">arXiv:2004.14984</a> <span> [<a href="https://arxiv.org/pdf/2004.14984">pdf</a>, <a href="https://arxiv.org/format/2004.14984">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Precise Tracking of Cosmic Muons using Time over Threshold property of NINO ASICs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Das%2C+S">Subhendu Das</a>, <a href="/search/physics?searchtype=author&query=Datta%2C+J">Jaydeep Datta</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</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="2004.14984v2-abstract-short" style="display: inline;"> This work reports a cost-effective, simple front-end readout and DAQ of a RPC-based muon scattering tomography system under construction. The Time-over-threshold property of NINO ASICs has been exploited to achieve precise tracking by extraction of position information. The use of a low-cost FPGA for event selection and TOT measurement has been demonstrated for a prototype RPC which has been trigg… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.14984v2-abstract-full').style.display = 'inline'; document.getElementById('2004.14984v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.14984v2-abstract-full" style="display: none;"> This work reports a cost-effective, simple front-end readout and DAQ of a RPC-based muon scattering tomography system under construction. The Time-over-threshold property of NINO ASICs has been exploited to achieve precise tracking by extraction of position information. The use of a low-cost FPGA for event selection and TOT measurement has been demonstrated for a prototype RPC which has been triggered by a cosmic ray hodoscope of three plastic scintillators. The relation between input pulse width and TOT has been established by analyzing the waveforms of the RPC signals. The TOT profile at different working voltages has been obtained by the FPGA and it has been fitted with the Gaussian distribution. Its standard deviation represents an estimate of the tracking precision. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.14984v2-abstract-full').style.display = 'none'; document.getElementById('2004.14984v2-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 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 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">7 pages, 12 figures, modifications in different sections</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.05504">arXiv:2003.05504</a> <span> [<a href="https://arxiv.org/pdf/2003.05504">pdf</a>, <a href="https://arxiv.org/format/2003.05504">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 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/10.1088/1748-0221/15/06/P06029">10.1088/1748-0221/15/06/P06029 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Material Discrimination in Cosmic Muon Imaging using Pattern Recognition Method </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Datta%2C+J">Jaydeep Datta</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</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="2003.05504v2-abstract-short" style="display: inline;"> This work reports numerical simulations and statistical tests carried out to study the performance of a prototype imaging setup to be developed for material discrimination using Muon Scattering Tomography (MST). The reconstructed images have been processed with a Pattern Recognition Method (PRM) to discriminate the low-Z and high-Z materials. The same method has been applied to examine the perform… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.05504v2-abstract-full').style.display = 'inline'; document.getElementById('2003.05504v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.05504v2-abstract-full" style="display: none;"> This work reports numerical simulations and statistical tests carried out to study the performance of a prototype imaging setup to be developed for material discrimination using Muon Scattering Tomography (MST). The reconstructed images have been processed with a Pattern Recognition Method (PRM) to discriminate the low-Z and high-Z materials. The same method has been applied to examine the performance of the setup in recognizing the shape of the test objects. Design parameters of the setup, such as area of the muon detectors, their physical placement, along with their spatial resolution, etc. have been discussed. To evaluate the efficacy of the newly proposed PRM, the results have been compared to another technique based on cluster finding. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.05504v2-abstract-full').style.display = 'none'; document.getElementById('2003.05504v2-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 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">Change in Caption ,References</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.09585">arXiv:2002.09585</a> <span> [<a href="https://arxiv.org/pdf/2002.09585">pdf</a>, <a href="https://arxiv.org/format/2002.09585">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 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/10.1088/1748-0221/16/01/P01038">10.1088/1748-0221/16/01/P01038 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Studies on charging-up of single Gas Electron Multiplier </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kumar%2C+V">Vishal Kumar</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Bhattacharya%2C+P">Purba Bhattacharya</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Sarkar%2C+S">Sandip Sarkar</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="2002.09585v3-abstract-short" style="display: inline;"> Mechanisms of charging-up and charging-down of Gas Electron Multiplier (GEM) have been studied. Experimental investigations have been carried out on both dielectric polarization and radiation charging of GEMs. Environmental parameters, such as pressure and temperature have been monitored to normalize their effects on the charging-up and charging-down measurements. Variation in gain due to the comb… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.09585v3-abstract-full').style.display = 'inline'; document.getElementById('2002.09585v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.09585v3-abstract-full" style="display: none;"> Mechanisms of charging-up and charging-down of Gas Electron Multiplier (GEM) have been studied. Experimental investigations have been carried out on both dielectric polarization and radiation charging of GEMs. Environmental parameters, such as pressure and temperature have been monitored to normalize their effects on the charging-up and charging-down measurements. Variation in gain due to the combined, as well as individual, effects of the mentioned parameters has been illustrated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.09585v3-abstract-full').style.display = 'none'; document.getElementById('2002.09585v3-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 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.05853">arXiv:1908.05853</a> <span> [<a href="https://arxiv.org/pdf/1908.05853">pdf</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> </div> </div> <p class="title is-5 mathjax"> Deep sub micron normally off AlGaN/GaN MOSFET on silicon with VTH > 5V and On Current > 0.5 A/mm </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kumar%2C+S">Sandeep Kumar</a>, <a href="/search/physics?searchtype=author&query=Vura%2C+S">Sandeep Vura</a>, <a href="/search/physics?searchtype=author&query=Dolmanan%2C+S+B">Surani B. Dolmanan</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sudhiranjan Tripathy</a>, <a href="/search/physics?searchtype=author&query=Muralidharan%2C+R">R. Muralidharan</a>, <a href="/search/physics?searchtype=author&query=Nath%2C+D+N">Digbijoy N. Nath</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="1908.05853v1-abstract-short" style="display: inline;"> We report on the demonstration of a deep sub-micron normally-off AlGaN/GaN HEMT with high on-current and high threshold voltage (VTH). The high-performance device was realized by utilizing a gate recess with length and depth of 200 nm and 124 nm respectively. The recess etched region had a roughness of 0.7 nm. Various recess etch depths and dielectric annealing conditions were used to tune the VTH… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.05853v1-abstract-full').style.display = 'inline'; document.getElementById('1908.05853v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.05853v1-abstract-full" style="display: none;"> We report on the demonstration of a deep sub-micron normally-off AlGaN/GaN HEMT with high on-current and high threshold voltage (VTH). The high-performance device was realized by utilizing a gate recess with length and depth of 200 nm and 124 nm respectively. The recess etched region had a roughness of 0.7 nm. Various recess etch depths and dielectric annealing conditions were used to tune the VTH. The optimized device exhibited on-current and VTH of 500 mA/mm and 5 V respectively. The measured breakdown characteristics of the devices and their limitations were investigated using 2D-TCAD device simulation. The penetration of the residual electric field in most of the recess region could be the reason for the premature breakdown of deeply scaled recess-gate e-mode HEMTs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.05853v1-abstract-full').style.display = 'none'; document.getElementById('1908.05853v1-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 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.01922">arXiv:1905.01922</a> <span> [<a href="https://arxiv.org/pdf/1905.01922">pdf</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> </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/pssa.201900766">10.1002/pssa.201900766 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Meandering gate edges for breakdown voltage enhancement in AlGaN/GaN HEMTs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kumar%2C+S">Sandeep Kumar</a>, <a href="/search/physics?searchtype=author&query=Dolmanan%2C+S+B">Surani B. Dolmanan</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sudhiranjan Tripathy</a>, <a href="/search/physics?searchtype=author&query=Muralidharan%2C+R">Rangarajan Muralidharan</a>, <a href="/search/physics?searchtype=author&query=Nath%2C+D+N">Digbijoy N. Nath</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="1905.01922v1-abstract-short" style="display: inline;"> In this letter, we report on a unique device design strategy for increasing the breakdown voltage and hence Baliga Figure of Merit (BFOM) of III-nitride HEMTs by engineering the gate edge towards the drain. The breakdown of such devices with meandering gate-drain access region (M-HEMT) are found to be 62% more compared to that of conventional HEMT while the ON resistance suffers by 76%, leading to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.01922v1-abstract-full').style.display = 'inline'; document.getElementById('1905.01922v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.01922v1-abstract-full" style="display: none;"> In this letter, we report on a unique device design strategy for increasing the breakdown voltage and hence Baliga Figure of Merit (BFOM) of III-nitride HEMTs by engineering the gate edge towards the drain. The breakdown of such devices with meandering gate-drain access region (M-HEMT) are found to be 62% more compared to that of conventional HEMT while the ON resistance suffers by 76%, leading to an overall improvement in the BFOM for by 28%. 3D-TCAD simulations show that the decrease in the peak electric field at the gate edge was responsible for increased breakdown voltage. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.01922v1-abstract-full').style.display = 'none'; document.getElementById('1905.01922v1-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> 6 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1902.01211">arXiv:1902.01211</a> <span> [<a href="https://arxiv.org/pdf/1902.01211">pdf</a>, <a href="https://arxiv.org/format/1902.01211">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 Detectors">physics.ins-det</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="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> </div> <p class="title is-5 mathjax"> A next-generation LHC heavy-ion experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adamov%C3%A1%2C+D">D. Adamov谩</a>, <a href="/search/physics?searchtype=author&query=Rinella%2C+G+A">G. Aglieri Rinella</a>, <a href="/search/physics?searchtype=author&query=Agnello%2C+M">M. Agnello</a>, <a href="/search/physics?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/physics?searchtype=author&query=Aleksandrov%2C+D">D. Aleksandrov</a>, <a href="/search/physics?searchtype=author&query=Alici%2C+A">A. Alici</a>, <a href="/search/physics?searchtype=author&query=Alkin%2C+A">A. Alkin</a>, <a href="/search/physics?searchtype=author&query=Alt%2C+T">T. Alt</a>, <a href="/search/physics?searchtype=author&query=Altsybeev%2C+I">I. Altsybeev</a>, <a href="/search/physics?searchtype=author&query=Andreou%2C+D">D. Andreou</a>, <a href="/search/physics?searchtype=author&query=Andronic%2C+A">A. Andronic</a>, <a href="/search/physics?searchtype=author&query=Antinori%2C+F">F. Antinori</a>, <a href="/search/physics?searchtype=author&query=Antonioli%2C+P">P. Antonioli</a>, <a href="/search/physics?searchtype=author&query=Appelsh%C3%A4user%2C+H">H. Appelsh盲user</a>, <a href="/search/physics?searchtype=author&query=Arnaldi%2C+R">R. Arnaldi</a>, <a href="/search/physics?searchtype=author&query=Arsene%2C+I+C">I. C. Arsene</a>, <a href="/search/physics?searchtype=author&query=Arslandok%2C+M">M. Arslandok</a>, <a href="/search/physics?searchtype=author&query=Averbeck%2C+R">R. Averbeck</a>, <a href="/search/physics?searchtype=author&query=Azmi%2C+M+D">M. D. Azmi</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/physics?searchtype=author&query=Bailhache%2C+R">R. Bailhache</a>, <a href="/search/physics?searchtype=author&query=Bala%2C+R">R. Bala</a>, <a href="/search/physics?searchtype=author&query=Barioglio%2C+L">L. Barioglio</a>, <a href="/search/physics?searchtype=author&query=Barnaf%C3%B6ldi%2C+G+G">G. G. Barnaf枚ldi</a>, <a href="/search/physics?searchtype=author&query=Barnby%2C+L+S">L. S. Barnby</a> , et al. (374 additional authors not shown) </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="1902.01211v2-abstract-short" style="display: inline;"> The present document discusses plans for a compact, next-generation multi-purpose detector at the LHC as a follow-up to the present ALICE experiment. The aim is to build a nearly massless barrel detector consisting of truly cylindrical layers based on curved wafer-scale ultra-thin silicon sensors with MAPS technology, featuring an unprecedented low material budget of 0.05% X$_0$ per layer, with th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.01211v2-abstract-full').style.display = 'inline'; document.getElementById('1902.01211v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1902.01211v2-abstract-full" style="display: none;"> The present document discusses plans for a compact, next-generation multi-purpose detector at the LHC as a follow-up to the present ALICE experiment. The aim is to build a nearly massless barrel detector consisting of truly cylindrical layers based on curved wafer-scale ultra-thin silicon sensors with MAPS technology, featuring an unprecedented low material budget of 0.05% X$_0$ per layer, with the innermost layers possibly positioned inside the beam pipe. In addition to superior tracking and vertexing capabilities over a wide momentum range down to a few tens of MeV/$c$, the detector will provide particle identification via time-of-flight determination with about 20~ps resolution. In addition, electron and photon identification will be performed in a separate shower detector. The proposed detector is conceived for studies of pp, pA and AA collisions at luminosities a factor of 20 to 50 times higher than possible with the upgraded ALICE detector, enabling a rich physics program ranging from measurements with electromagnetic probes at ultra-low transverse momenta to precision physics in the charm and beauty sector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.01211v2-abstract-full').style.display = 'none'; document.getElementById('1902.01211v2-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 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">Input to the 2020 Update of the European Particle Physics Strategy</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.09626">arXiv:1811.09626</a> <span> [<a href="https://arxiv.org/pdf/1811.09626">pdf</a>, <a href="https://arxiv.org/format/1811.09626">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 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/10.1142/S0217732319502171">10.1142/S0217732319502171 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Axially magnetized Dark Energy cosmological model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mishra%2C+B">B. Mishra</a>, <a href="/search/physics?searchtype=author&query=Ray%2C+P+P">Pratik P Ray</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">S. K. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Bamba%2C+K">Kazuharu Bamba</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="1811.09626v3-abstract-short" style="display: inline;"> We investigate the behaviour of the skewness parameters for an anisotropic universe in the framework of General Relativity. Non interacting dark energy is considered in presence of electromagnetic field. A time varying deceleration parameter simulated by a hybrid scale factor is considered. The dynamics of the universe is investigated in presence and absence of magnetic field. The equation of stat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.09626v3-abstract-full').style.display = 'inline'; document.getElementById('1811.09626v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.09626v3-abstract-full" style="display: none;"> We investigate the behaviour of the skewness parameters for an anisotropic universe in the framework of General Relativity. Non interacting dark energy is considered in presence of electromagnetic field. A time varying deceleration parameter simulated by a hybrid scale factor is considered. The dynamics of the universe is investigated in presence and absence of magnetic field. The equation of state parameter of dark energy evolves within the range predicted by the observations. Magnetic field is observed to have a substantial effect on the cosmic dynamics and the skewness parameters. The models discussed here end in a big rip and become isotropic at finite time. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.09626v3-abstract-full').style.display = 'none'; document.getElementById('1811.09626v3-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 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">9 pages, 13 figures, Version accepted for publication in Mod. Phys. Lett. A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Mod. Phys. Lett. A, 34(27), 1950217 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.03725">arXiv:1806.03725</a> <span> [<a href="https://arxiv.org/pdf/1806.03725">pdf</a>, <a href="https://arxiv.org/format/1806.03725">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</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/10.1088/1748-0221/14/07/C07007">10.1088/1748-0221/14/07/C07007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Material Identification with Cosmic Ray Muons using RPCs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sridhar Tripathy</a>, <a href="/search/physics?searchtype=author&query=Datta%2C+J">Jaydeep Datta</a>, <a href="/search/physics?searchtype=author&query=Jash%2C+A">Abhik Jash</a>, <a href="/search/physics?searchtype=author&query=Bouri%2C+S">Subhadip Bouri</a>, <a href="/search/physics?searchtype=author&query=Majumdar%2C+N">Nayana Majumdar</a>, <a href="/search/physics?searchtype=author&query=Mukhopadhyay%2C+S">Supratik Mukhopadhyay</a>, <a href="/search/physics?searchtype=author&query=Sarkar%2C+S">Sandip Sarkar</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="1806.03725v1-abstract-short" style="display: inline;"> We plan to build an imaging setup for material identification utilizing the Coulomb scattering of cosmic ray muons due to their interaction with the materials and tracking their trajectories with RPCs. To begin with, we consider a setup of six RPCs stacked in a parallel manner to read the position and timing information of the muons before and after their interaction with a phantom of a given mate… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03725v1-abstract-full').style.display = 'inline'; document.getElementById('1806.03725v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.03725v1-abstract-full" style="display: none;"> We plan to build an imaging setup for material identification utilizing the Coulomb scattering of cosmic ray muons due to their interaction with the materials and tracking their trajectories with RPCs. To begin with, we consider a setup of six RPCs stacked in a parallel manner to read the position and timing information of the muons before and after their interaction with a phantom of a given material using a set of three RPCs for each phase. Here we present a simulation work carried out to study the image formation of the phantom of several materials using the present setup. A detailed modeling of the imaging system consisting of six RPCs was done using GEANT4. Cosmic Ray Library (CRY) was used for generation of particles with the appropriate distribution of energies and momenta. Three reconstruction algorithms were followed for material identification and image reconstruction, viz. Point of Closest Approach (POCA), Iterative POCA and the Binned Clustering Algorithm. A weighted metric discriminator was calculated for target object identification. Using the algorithms, the imaging of the area of interest lying between the two layers of RPCs was done. The time required to discriminate target objects and do the image reconstruction has been studied. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03725v1-abstract-full').style.display = 'none'; document.getElementById('1806.03725v1-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 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">9 pages, 12 figures, RPC-2018 workshop</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Instrumentation,14 (2019) C07007 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.03291">arXiv:1806.03291</a> <span> [<a href="https://arxiv.org/pdf/1806.03291">pdf</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> </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/10.1109/TED.2019.2893288">10.1109/TED.2019.2893288 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Investigation of Ta2O5 as an alternative high \k{appa} dielectric for InAlN/GaN MOS HEMT on Si </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kumar%2C+S">Sandeep Kumar</a>, <a href="/search/physics?searchtype=author&query=Kumar%2C+H">Himanshu Kumar</a>, <a href="/search/physics?searchtype=author&query=Vura%2C+S">Sandeep Vura</a>, <a href="/search/physics?searchtype=author&query=Pratiyush%2C+A+S">Anamika Singh Pratiyush</a>, <a href="/search/physics?searchtype=author&query=Charan%2C+V+S">Vanjari Sai Charan</a>, <a href="/search/physics?searchtype=author&query=Dolmanan%2C+S+B">Surani B. Dolmanan</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sudhiranjan Tripathy</a>, <a href="/search/physics?searchtype=author&query=Muralidharan%2C+R">Rangarajan Muralidharan</a>, <a href="/search/physics?searchtype=author&query=Nath%2C+D+N">Digbijoy N. Nath</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="1806.03291v1-abstract-short" style="display: inline;"> We report on the demonstration and investigation of Ta2O5 as high-\k{appa} dielectric for InAlN/GaN-MOS HEMT-on-Si. Ta2O5 of thickness 24 nm and dielectric constant ~ 30 was sputter deposited on InAlN/GaN HEMT and was investigated for different post deposition anneal conditions (PDA). The gate leakage was 16nA/mm at -15 V which was ~ 5 orders of magnitude lower compared to reference HEMT. The 2-di… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03291v1-abstract-full').style.display = 'inline'; document.getElementById('1806.03291v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.03291v1-abstract-full" style="display: none;"> We report on the demonstration and investigation of Ta2O5 as high-\k{appa} dielectric for InAlN/GaN-MOS HEMT-on-Si. Ta2O5 of thickness 24 nm and dielectric constant ~ 30 was sputter deposited on InAlN/GaN HEMT and was investigated for different post deposition anneal conditions (PDA). The gate leakage was 16nA/mm at -15 V which was ~ 5 orders of magnitude lower compared to reference HEMT. The 2-dimensional electron gas (2DEG) density was found to vary with annealing temperature suggesting the presence of net charge at the Ta2O5/InAlN interface. Dispersion in the capacitance-voltage (C-V) characteristics was used to estimate the frequency-dependent interface charge while energy band diagrams under flat band conditions were investigated to estimate fixed charge. The optimum anneal condition was found to be 500掳 C which has resulted into a flat band voltage spread (VFB) of 0.4 V and interface fix charge (Qf) of 3.98x10^13 cm-2. XPS (X-ray photoelectron spectroscopy) spectra of as deposited and annealed Ta2O5 film were analyzed for Ta and O compositions in the film. The sample annealed at 500掳 C has shown Ta:O ratio of 0.41.XRD (X-ray diffraction) analysis was done to check the evolution of poly-crystallization of the Ta2O5 film at higher annealing temperatures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03291v1-abstract-full').style.display = 'none'; document.getElementById('1806.03291v1-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 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1803.05302">arXiv:1803.05302</a> <span> [<a href="https://arxiv.org/pdf/1803.05302">pdf</a>, <a href="https://arxiv.org/format/1803.05302">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 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/10.1142/S0217732318500529">10.1142/S0217732318500529 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Cosmological models with a hybrid scale factor in an extended gravity theory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mishra%2C+B">B. Mishra</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">S. K. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Tarai%2C+S">Sankarsan Tarai</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="1803.05302v1-abstract-short" style="display: inline;"> A general formalism to investigate Bianchi type $VI_h$ universes is developed in an extended theory of gravity. A minimally coupled geometry and matter field is considered with a rescaled function of $f(R,T)$ substituted in place of the Ricci scalar $R$ in the geometrical action. Dynamical aspects of the models are discussed by using a hybrid scale factor that behaves as power law in an initial ep… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.05302v1-abstract-full').style.display = 'inline'; document.getElementById('1803.05302v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1803.05302v1-abstract-full" style="display: none;"> A general formalism to investigate Bianchi type $VI_h$ universes is developed in an extended theory of gravity. A minimally coupled geometry and matter field is considered with a rescaled function of $f(R,T)$ substituted in place of the Ricci scalar $R$ in the geometrical action. Dynamical aspects of the models are discussed by using a hybrid scale factor that behaves as power law in an initial epoch and as an exponential form at late epoch. The power law behaviour and the exponential behaviour appear as two extreme cases of the present model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.05302v1-abstract-full').style.display = 'none'; document.getElementById('1803.05302v1-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 March, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">8 pages, 2 figures, Accepted for Publication in Modern Physics Letter A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Modern Physics Letter A, Vol. 33(9), 2018, 1850052 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.10399">arXiv:1709.10399</a> <span> [<a href="https://arxiv.org/pdf/1709.10399">pdf</a>, <a href="https://arxiv.org/format/1709.10399">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 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/10.1142/S0217732318501705">10.1142/S0217732318501705 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Anisotropic cosmological reconstruction in $f(R,T)$ gravity </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mishra%2C+B">B. Mishra</a>, <a href="/search/physics?searchtype=author&query=Tarai%2C+S">Sankarsan Tarai</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">S. K. Tripathy</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="1709.10399v2-abstract-short" style="display: inline;"> Anisotropic cosmological models are constructed in $f(R,T)$ gravity theory to investigate the dynamics of universe concerning the late time cosmic acceleration. Using a more general and simple approach, the effect of the coupling constant and anisotropy on the cosmic dynamics have been investigated. Cosmic anisotropy is found affect substantially the cosmic dynamics. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.10399v2-abstract-full" style="display: none;"> Anisotropic cosmological models are constructed in $f(R,T)$ gravity theory to investigate the dynamics of universe concerning the late time cosmic acceleration. Using a more general and simple approach, the effect of the coupling constant and anisotropy on the cosmic dynamics have been investigated. Cosmic anisotropy is found affect substantially the cosmic dynamics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.10399v2-abstract-full').style.display = 'none'; document.getElementById('1709.10399v2-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 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 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">7 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Modern Physics Letter A, 33(29), 2018, 1850170 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.03692">arXiv:1709.03692</a> <span> [<a href="https://arxiv.org/pdf/1709.03692">pdf</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> </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/10.1063/1.5004024">10.1063/1.5004024 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> UV Detector based on InAlN/GaN-on-Si HEMT Stack with Photo-to-Dark Current Ratio > 107 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kumar%2C+S">Sandeep Kumar</a>, <a href="/search/physics?searchtype=author&query=Pratiyush%2C+A+S">Anamika Singh Pratiyush</a>, <a href="/search/physics?searchtype=author&query=Dolmanan%2C+S+B">Surani Bin Dolmanan</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sudhiranjan Tripathy</a>, <a href="/search/physics?searchtype=author&query=Muralidharan%2C+R">Rangarajan Muralidharan</a>, <a href="/search/physics?searchtype=author&query=Nath%2C+D+N">Digbijoy Neelim Nath</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="1709.03692v1-abstract-short" style="display: inline;"> We demonstrate an InAlN/GaN-on-Si HEMT based UV detector with photo to dark current ratio > 107. Ti/Al/Ni/Au metal stack was evaporated and rapid thermal annealed for Ohmic contacts to the 2D electron gas (2DEG) at the InAlN/GaN interface while the channel + barrier was recess etched to a depth of 20 nm to pinch-off the 2DEG between Source-Drain pads. Spectral responsivity (SR) of 34 A/W at 367 nm… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.03692v1-abstract-full').style.display = 'inline'; document.getElementById('1709.03692v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.03692v1-abstract-full" style="display: none;"> We demonstrate an InAlN/GaN-on-Si HEMT based UV detector with photo to dark current ratio > 107. Ti/Al/Ni/Au metal stack was evaporated and rapid thermal annealed for Ohmic contacts to the 2D electron gas (2DEG) at the InAlN/GaN interface while the channel + barrier was recess etched to a depth of 20 nm to pinch-off the 2DEG between Source-Drain pads. Spectral responsivity (SR) of 34 A/W at 367 nm was measured at 5 V in conjunction with very high photo to dark current ratio of > 10^7. The photo to dark current ratio at a fixed bias was found to be decreasing with increase in recess length of the PD. The fabricated devices were found to exhibit a UV-to-visible rejection ratio of >103 with a low dark current < 32 pA at 5 V. Transient measurements showed rise and fall times in the range of 3-4 ms. The gain mechanism was investigated and carrier lifetimes were estimated which matched well with those reported elsewhere. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.03692v1-abstract-full').style.display = 'none'; document.getElementById('1709.03692v1-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> 12 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">12 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/1708.03811">arXiv:1708.03811</a> <span> [<a href="https://arxiv.org/pdf/1708.03811">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"> Dielectric Engineering of HfO2 Gate Stacks Towards Normally-ON and Normally-OFF GaN HEMTs on Silicon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chandrasekar%2C+H">Hareesh Chandrasekar</a>, <a href="/search/physics?searchtype=author&query=Kumar%2C+S">Sandeep Kumar</a>, <a href="/search/physics?searchtype=author&query=Ganapathi%2C+K+L">K. L. Ganapathi</a>, <a href="/search/physics?searchtype=author&query=Prabhu%2C+S">Shreesha Prabhu</a>, <a href="/search/physics?searchtype=author&query=Dolmanan%2C+S+B">Surani Bin Dolmanan</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Sudhiranjan Tripathy</a>, <a href="/search/physics?searchtype=author&query=Raghavan%2C+S">Srinivasan Raghavan</a>, <a href="/search/physics?searchtype=author&query=Bhat%2C+K+N">K. N. Bhat</a>, <a href="/search/physics?searchtype=author&query=Mohan%2C+S">Sangeneni Mohan</a>, <a href="/search/physics?searchtype=author&query=Muralidharan%2C+R">R. Muralidharan</a>, <a href="/search/physics?searchtype=author&query=Bhat%2C+N">Navakanta Bhat</a>, <a href="/search/physics?searchtype=author&query=Nath%2C+D+N">Digbijoy N. Nath</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="1708.03811v1-abstract-short" style="display: inline;"> We report on the interfacial electronic properties of HfO2 gate dielectrics both, with GaN towards normally-OFF recessed HEMT architectures and the AlGaN barrier for normally-ON AlGaN/GaN MISHEMTs for GaN device platforms on Si. A conduction band offset of 1.9 eV is extracted for HfO2/GaN along with a very low density of fixed bulk and interfacial charges. Conductance measurements on HfO2/GaN MOSC… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.03811v1-abstract-full').style.display = 'inline'; document.getElementById('1708.03811v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1708.03811v1-abstract-full" style="display: none;"> We report on the interfacial electronic properties of HfO2 gate dielectrics both, with GaN towards normally-OFF recessed HEMT architectures and the AlGaN barrier for normally-ON AlGaN/GaN MISHEMTs for GaN device platforms on Si. A conduction band offset of 1.9 eV is extracted for HfO2/GaN along with a very low density of fixed bulk and interfacial charges. Conductance measurements on HfO2/GaN MOSCAPs reveal an interface trap state continuum with a density of 9.37x1012 eV-1cm-2 centered at 0.48 eV below EC. The forward and reverse current densities are shown to be governed by Fowler-Nordheim tunneling and Poole-Frenkel emission respectively. Normally-ON HfO2/AlGaN/GaN MISHEMTs exhibit negligible shifts in threshold voltage, transconductances of 110mS/mm for 3 渭m gate length devices, and three-terminal OFF-state gate leakage currents of 20 nA/mm at a VD of 100 V. Dynamic capacitance dispersion measurements show two peaks at the AlGaN/GaN interface corresponding to slow and fast interface traps with a peak Dit of 5.5x1013 eV-1cm-2 and 1.5x1013 eV-1cm-2 at trap levels 0.55 eV and 0.46 eV below EC respectively. The HfO2/AlGaN interface exhibits a peak Dit of 4.4x1013 eV-1cm- 2 at 0.45 eV below EC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.03811v1-abstract-full').style.display = 'none'; document.getElementById('1708.03811v1-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> 12 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">6 pages, 10 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/1701.08632">arXiv:1701.08632</a> <span> [<a href="https://arxiv.org/pdf/1701.08632">pdf</a>, <a href="https://arxiv.org/format/1701.08632">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 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/s10509-018-3313-2">10.1007/s10509-018-3313-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Bianchi-V String Cosmological model with Dark Energy Anisotropy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mishra%2C+B">B. Mishra</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">S. K. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Ray%2C+P+P">Pratik P Ray</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="1701.08632v4-abstract-short" style="display: inline;"> The role of anisotropic components on the dark energy and the dynamics of the universe is investigated. An anisotropic dark energy fluid with different pressures along different spatial directions is assumed to incorporate the effect of anisotropy. One dimensional cosmic strings aligned along x-direction supplement some kind of anisotropy. Anisotropy in the dark energy pressure is found to evolve… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.08632v4-abstract-full').style.display = 'inline'; document.getElementById('1701.08632v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.08632v4-abstract-full" style="display: none;"> The role of anisotropic components on the dark energy and the dynamics of the universe is investigated. An anisotropic dark energy fluid with different pressures along different spatial directions is assumed to incorporate the effect of anisotropy. One dimensional cosmic strings aligned along x-direction supplement some kind of anisotropy. Anisotropy in the dark energy pressure is found to evolve with cosmic expansion at least at late times. At an early phase, the anisotropic effect due to the cosmic strings substantially affect the dynamics of the accelerating universe. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.08632v4-abstract-full').style.display = 'none'; document.getElementById('1701.08632v4-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 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">9 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 83C05 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Astrophysics and Space Science, Vol.363:86, 2018 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1612.08808">arXiv:1612.08808</a> <span> [<a href="https://arxiv.org/pdf/1612.08808">pdf</a>, <a href="https://arxiv.org/ps/1612.08808">ps</a>, <a href="https://arxiv.org/format/1612.08808">other</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> </div> </div> <p class="title is-5 mathjax"> MusculoSkeletal Modeling Using Kinect Data For Telerehabilitation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Das%2C+R+K">Rajat Kumar Das</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+R">Soumya Ranjan Tripathy</a>, <a href="/search/physics?searchtype=author&query=Chakravarty%2C+K">Kingshuk Chakravarty</a>, <a href="/search/physics?searchtype=author&query=Chatterjee%2C+D">Debatri Chatterjee</a>, <a href="/search/physics?searchtype=author&query=Sinha%2C+A">Aniruddha Sinha</a>, <a href="/search/physics?searchtype=author&query=Chaudhury%2C+R">Rupam Chaudhury</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="1612.08808v1-abstract-short" style="display: inline;"> Balance, gait and postural control are some of the key factors in determining the overall stability of an individual. Several highend and costly solutions exist to perform movement analysis in clinical settings. OpenSim is a tool which uses 39 marker positions, obtained from such highend solutions like VICON or equivalent multicamera setup, for the analysis of inverse kinematics and inverse dynami… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1612.08808v1-abstract-full').style.display = 'inline'; document.getElementById('1612.08808v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1612.08808v1-abstract-full" style="display: none;"> Balance, gait and postural control are some of the key factors in determining the overall stability of an individual. Several highend and costly solutions exist to perform movement analysis in clinical settings. OpenSim is a tool which uses 39 marker positions, obtained from such highend solutions like VICON or equivalent multicamera setup, for the analysis of inverse kinematics and inverse dynamics. However, an affordable solution for deriving musculoskeletal joint kinematics parameters using a low cost Kinect device is of immense importance. In this paper, we initially study the feasibility of using OpenSim tool on 20 joint locations of human being, obtained from Kinect data. Next, we analyze the various joint forces and torques experienced during a Single Limb Stance (SLS) exercise performed by healthy subjects in normal, overweight and obese categories. Results indicate that a subset of parameters related to forces and torque in hip, lumber and pelvis are the most important ones that contribute significantly in maintaining static balance in SLS. Statistical analysis demonstrates that the pelvis list and tilt moments are the key biomarkers for maintaining the statibility in SLS, thus leading to a possibility of personalizing the therapy in tele-rehabilitation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1612.08808v1-abstract-full').style.display = 'none'; document.getElementById('1612.08808v1-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, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">5 pages, http://www.nipsml4hc.ws/posters</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.06789">arXiv:1610.06789</a> <span> [<a href="https://arxiv.org/pdf/1610.06789">pdf</a>, <a href="https://arxiv.org/format/1610.06789">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 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/10.1142/S0217732316501947">10.1142/S0217732316501947 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Density Dependence of Nuclear Symmetry Energy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behera%2C+B">B Behera</a>, <a href="/search/physics?searchtype=author&query=Routray%2C+T+R">T R Routray</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">S K Tripathy</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="1610.06789v1-abstract-short" style="display: inline;"> High density behaviour of nuclear symmetry energy is studied on the basis of a stiffest density dependence of asymmetric contribution to energy per nucleon in charge neutral $n+p+e+渭$ matter under beta equilibrium. The density dependence of nuclear symmetry energy obtained in this way is neither very stiff nor soft at high densities and is found to be in conformity with recent observations of neut… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.06789v1-abstract-full').style.display = 'inline'; document.getElementById('1610.06789v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.06789v1-abstract-full" style="display: none;"> High density behaviour of nuclear symmetry energy is studied on the basis of a stiffest density dependence of asymmetric contribution to energy per nucleon in charge neutral $n+p+e+渭$ matter under beta equilibrium. The density dependence of nuclear symmetry energy obtained in this way is neither very stiff nor soft at high densities and is found to be in conformity with recent observations of neutron stars <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.06789v1-abstract-full').style.display = 'none'; document.getElementById('1610.06789v1-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">10 pages, 2 figures, accepted for publication in Modern Physics Letters A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Modern Physics Letters A, VOl 34, No 4, 1650194 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.01457">arXiv:1509.01457</a> <span> [<a href="https://arxiv.org/pdf/1509.01457">pdf</a>, <a href="https://arxiv.org/format/1509.01457">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 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.optmat.2016.01.012">10.1016/j.optmat.2016.01.012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Optical and electronic properties of some binary semiconductors from energy gaps </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">Sunil K. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Pattanaik%2C+A">Anup Pattanaik</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="1509.01457v2-abstract-short" style="display: inline;"> II-VI and III-V tetrahedral semiconductors have significant potential for novel optoelectronic applications. In the present work, some of the optical and electronic properties of these groups of semiconductors have been studied using a recently proposed empirical relationship for refractive index from energy gap. The calculated values of these properties are also compared with those calculated fro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.01457v2-abstract-full').style.display = 'inline'; document.getElementById('1509.01457v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.01457v2-abstract-full" style="display: none;"> II-VI and III-V tetrahedral semiconductors have significant potential for novel optoelectronic applications. In the present work, some of the optical and electronic properties of these groups of semiconductors have been studied using a recently proposed empirical relationship for refractive index from energy gap. The calculated values of these properties are also compared with those calculated from some well known relationships. From an analysis of the calculated electronic polarisability of these tetrahedral binary semiconductors from different formulations, we have proposed an empirical relation for its calculation. The predicted values of electronic polarisability of these semiconductors agree fairly well with the known values over a wide range of energy gap. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.01457v2-abstract-full').style.display = 'none'; document.getElementById('1509.01457v2-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, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 August, 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">28 pages, 10 figures, submitted to Optical Materials</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Optical Materials, 53 (2016) 123-133 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.03511">arXiv:1508.03511</a> <span> [<a href="https://arxiv.org/pdf/1508.03511">pdf</a>, <a href="https://arxiv.org/format/1508.03511">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 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.optmat.2015.04.026">10.1016/j.optmat.2015.04.026 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Refractive Indices of Semiconductors from Energy gaps </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">S. K. Tripathy</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="1508.03511v1-abstract-short" style="display: inline;"> An empirical relation based on energy gap and refractive index data has been proposed in the present study to calculate the refractive index of semiconductors. The proposed model is then applied to binary as well as ternary semiconductors for a wide range of energy gap. Using the relation, dielectric constants of some III-V group semiconductors are calculated. The calculated values for different g… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.03511v1-abstract-full').style.display = 'inline'; document.getElementById('1508.03511v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.03511v1-abstract-full" style="display: none;"> An empirical relation based on energy gap and refractive index data has been proposed in the present study to calculate the refractive index of semiconductors. The proposed model is then applied to binary as well as ternary semiconductors for a wide range of energy gap. Using the relation, dielectric constants of some III-V group semiconductors are calculated. The calculated values for different group of binary semiconductors, alkali halides and ternary semiconductors fairly agree with other calculations and known values over a wide range of energy gap. The temperature variation of refractive index for some binary semiconductors have been calculated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.03511v1-abstract-full').style.display = 'none'; document.getElementById('1508.03511v1-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 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">21 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Optical Materials, 46,240-246 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.01670">arXiv:1508.01670</a> <span> [<a href="https://arxiv.org/pdf/1508.01670">pdf</a>, <a href="https://arxiv.org/format/1508.01670">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="Biomolecules">q-bio.BM</span> </div> </div> <p class="title is-5 mathjax"> Time traces of individual kinesin motors suggest functional heterogeneity </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Reddy%2C+B+J+N">Babu J. N. Reddy</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">Suvranta Tripathy</a>, <a href="/search/physics?searchtype=author&query=Xu%2C+J">Jing Xu</a>, <a href="/search/physics?searchtype=author&query=Mattson%2C+M">Michelle Mattson</a>, <a href="/search/physics?searchtype=author&query=Arabi%2C+K">Karim Arabi</a>, <a href="/search/physics?searchtype=author&query=Vershinin%2C+M">Michael Vershinin</a>, <a href="/search/physics?searchtype=author&query=Gross%2C+S">Steven Gross</a>, <a href="/search/physics?searchtype=author&query=Hyeon%2C+C">Changbong Hyeon</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="1508.01670v1-abstract-short" style="display: inline;"> Conventional analysis of in vitro assays of motor proteins rests on the assumption that all proteins with the same chemical composition function identically; however molecule-to-molecule variation is often seen even in well-controlled experiments. In an effort to obtain a statistically meaningful set of time traces that simultaneously avoid any experimental artifacts, we performed quantum-dot labe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.01670v1-abstract-full').style.display = 'inline'; document.getElementById('1508.01670v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.01670v1-abstract-full" style="display: none;"> Conventional analysis of in vitro assays of motor proteins rests on the assumption that all proteins with the same chemical composition function identically; however molecule-to-molecule variation is often seen even in well-controlled experiments. In an effort to obtain a statistically meaningful set of time traces that simultaneously avoid any experimental artifacts, we performed quantum-dot labeled kinesin experiments on both surface and levitated microtubules. Similar to glassy systems, we found that mean velocities of individual kinesin motors vary widely from one motor to another, the variation of which is greater than that expected from the stochastic variation of stepping times. In the presence of heterogeneity, an ensemble-averaged quantity such as diffusion constant or randomness parameter is ill-defined. We propose to analyze heterogeneous data from single molecule measurements by decomposing them into homogeneous subensembles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.01670v1-abstract-full').style.display = 'none'; document.getElementById('1508.01670v1-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 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">10 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/1507.03515">arXiv:1507.03515</a> <span> [<a href="https://arxiv.org/pdf/1507.03515">pdf</a>, <a href="https://arxiv.org/ps/1507.03515">ps</a>, <a href="https://arxiv.org/format/1507.03515">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 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/10.1142/S0217732315501758">10.1142/S0217732315501758 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Anisotropic dark energy model with a hybrid scale factor </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mishra%2C+B">B. Mishra</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">S. K. Tripathy</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="1507.03515v2-abstract-short" style="display: inline;"> Anisotropic dark energy model with dynamic pressure anisotropies along different spatial directions is constructed at the backdrop of a spatially homogeneous diagonal Bianchi type $V$ $(BV)$ space-time in the framework of General Relativity. A time varying deceleration parameter generating a hybrid scale factor is considered to simulate a cosmic transition from early deceleration to late time acce… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.03515v2-abstract-full').style.display = 'inline'; document.getElementById('1507.03515v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1507.03515v2-abstract-full" style="display: none;"> Anisotropic dark energy model with dynamic pressure anisotropies along different spatial directions is constructed at the backdrop of a spatially homogeneous diagonal Bianchi type $V$ $(BV)$ space-time in the framework of General Relativity. A time varying deceleration parameter generating a hybrid scale factor is considered to simulate a cosmic transition from early deceleration to late time acceleration. We found that the pressure anisotropies along the $y-$ and $z-$ axes evolve dynamically and continue along with the cosmic expansion without being subsided even at late times. The anisotropic pressure along the $x-$axis becomes equal to the mean fluid pressure. At a late phase of cosmic evolution, the model enters into a phantom region. From a state finder diagnosis, it is found that the model overlaps with $螞$CDM at late phase of cosmic time. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.03515v2-abstract-full').style.display = 'none'; document.getElementById('1507.03515v2-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, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Modern Physics Letters A, VOl 30, No 36 (2015)1550175 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1410.3156">arXiv:1410.3156</a> <span> [<a href="https://arxiv.org/pdf/1410.3156">pdf</a>, <a href="https://arxiv.org/format/1410.3156">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 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/10.1140/epjc/s10052-015-3371-3">10.1140/epjc/s10052-015-3371-3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Unified dark fluid in Brans-Dicke theory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tripathy%2C+S+K">Sunil K. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Behera%2C+D">Dipanjali Behera</a>, <a href="/search/physics?searchtype=author&query=Mishra%2C+B">Bivudutta Mishra</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="1410.3156v4-abstract-short" style="display: inline;"> Anisotropic dark energy cosmological models are constructed in the frame work of generalised Brans-Dicke theory with a self interacting potential. Wet dark fluid characterized by a linear equation of state is considered as the source of dark energy. Shear scalar is considered to be proportional to the expansion scalar simulating an anisotropic relationship among the directional expansion rates. Th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.3156v4-abstract-full').style.display = 'inline'; document.getElementById('1410.3156v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1410.3156v4-abstract-full" style="display: none;"> Anisotropic dark energy cosmological models are constructed in the frame work of generalised Brans-Dicke theory with a self interacting potential. Wet dark fluid characterized by a linear equation of state is considered as the source of dark energy. Shear scalar is considered to be proportional to the expansion scalar simulating an anisotropic relationship among the directional expansion rates. The dynamics of the universe in presence of wet dark fluid in anisotropic background have been discussed. The presence of evolving scalar field makes it possible to get accelerating phase of expansion even for a linear relationship among the directional Hubble rates. It is found that, the anisotropy in expansion rates does not affect the scalar field, self interacting potential but it controls the non-evolving part of the Brans- Dicke parameter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.3156v4-abstract-full').style.display = 'none'; document.getElementById('1410.3156v4-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 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2014. </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">27 pages, 8 figures, to appear in Eur. Phys. J. C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J . C. (2015)75:149 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1011.0799">arXiv:1011.0799</a> <span> [<a href="https://arxiv.org/pdf/1011.0799">pdf</a>, <a href="https://arxiv.org/ps/1011.0799">ps</a>, <a href="https://arxiv.org/format/1011.0799">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Space Physics">physics.space-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/10.1088/1742-6596/271/1/012005">10.1088/1742-6596/271/1/012005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Local helioseismology of sunspot regions: comparison of ring-diagram and time-distance results </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kosovichev%2C+A+G">A. G. Kosovichev</a>, <a href="/search/physics?searchtype=author&query=Basu%2C+S">S. Basu</a>, <a href="/search/physics?searchtype=author&query=Bogart%2C+R">R. Bogart</a>, <a href="/search/physics?searchtype=author&query=Duvall%2C+T+L">T. L. Duvall Jr</a>, <a href="/search/physics?searchtype=author&query=Gonzalez-Hernandez%2C+I">I. Gonzalez-Hernandez</a>, <a href="/search/physics?searchtype=author&query=Haber%2C+D">D. Haber</a>, <a href="/search/physics?searchtype=author&query=Hartlep%2C+T">T. Hartlep</a>, <a href="/search/physics?searchtype=author&query=Howe%2C+R">R. Howe</a>, <a href="/search/physics?searchtype=author&query=Komm%2C+R">R. Komm</a>, <a href="/search/physics?searchtype=author&query=Kholikov%2C+S">S. Kholikov</a>, <a href="/search/physics?searchtype=author&query=Parchevsky%2C+K+V">K. V. Parchevsky</a>, <a href="/search/physics?searchtype=author&query=Tripathy%2C+S">S. Tripathy</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+J">J. Zhao</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="1011.0799v1-abstract-short" style="display: inline;"> Local helioseismology provides unique information about the subsurface structure and dynamics of sunspots and active regions. However, because of complexity of sunspot regions local helioseismology diagnostics require careful analysis of systematic uncertainties and physical interpretation of the inversion results. We present new results of comparison of the ring-diagram analysis and time-distance… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.0799v1-abstract-full').style.display = 'inline'; document.getElementById('1011.0799v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1011.0799v1-abstract-full" style="display: none;"> Local helioseismology provides unique information about the subsurface structure and dynamics of sunspots and active regions. However, because of complexity of sunspot regions local helioseismology diagnostics require careful analysis of systematic uncertainties and physical interpretation of the inversion results. We present new results of comparison of the ring-diagram analysis and time-distance helioseismology for active region NOAA 9787, for which a previous comparison showed significant differences in the subsurface sound-speed structure, and discuss systematic uncertainties of the measurements and inversions. Our results show that both the ring-diagram and time-distance techniques give qualitatively similar results, revealing a characteristic two-layer seismic sound-speed structure consistent with the results for other active regions. However, a quantitative comparison of the inversion results is not straightforward. It must take into account differences in the sensitivity, spatial resolution and the averaging kernels. In particular, because of the acoustic power suppression, the contribution of the sunspot seismic structure to the ring-diagram signal can be substantially reduced. We show that taking into account this effect reduces the difference in the depth of transition between the negative and positive sound-speed variations inferred by these methods. Further detailed analysis of the sensitivity, resolution and averaging properties of the local helioseismology methods is necessary for consolidation of the inversion results. It seems to be important that both methods indicate that the seismic structure of sunspots is rather deep and extends to at least 20 Mm below the surface, putting constraints on theoretical models of sunspots. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.0799v1-abstract-full').style.display = 'none'; document.getElementById('1011.0799v1-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> 3 November, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2010. </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, 10 figures, submitted to Journal of Physics: Conference Series (JPCS) GONG 2010 - SoHO 24 "A new era of seismology of the Sun and solar-like stars", June 27 - July 2, 2010 Aix-en-Provence, France</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 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