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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/2401.16691">arXiv:2401.16691</a> <span> [<a href="https://arxiv.org/pdf/2401.16691">pdf</a>, <a href="https://arxiv.org/format/2401.16691">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> </div> </div> <p class="title is-5 mathjax"> Social Physics of Bacteria: Avoidance of an Information Black Hole </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Phan%2C+T+V">Trung V. Phan</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Shengkai Li</a>, <a href="/search/physics?searchtype=author&query=Ferreris%2C+D">Domenic Ferreris</a>, <a href="/search/physics?searchtype=author&query=Morris%2C+R">Ryan Morris</a>, <a href="/search/physics?searchtype=author&query=Bos%2C+J">Julia Bos</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+B">Buming Guo</a>, <a href="/search/physics?searchtype=author&query=Martiniani%2C+S">Stefano Martiniani</a>, <a href="/search/physics?searchtype=author&query=Chaikin%2C+P">Paul Chaikin</a>, <a href="/search/physics?searchtype=author&query=Kevrekidis%2C+Y+G">Yannis G. Kevrekidis</a>, <a href="/search/physics?searchtype=author&query=Austin%2C+R+H">Robert H. Austin</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="2401.16691v2-abstract-short" style="display: inline;"> Social physics explores responses to information exchange in a social network, and can be mapped down to bacterial collective signaling. Here, we explore how social inter-bacterial communication includes coordination of response to communication loss, as opposed to solitary searching for food, with collective response emergence at the population level. We present a 2-dimensional enclosed microflui… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.16691v2-abstract-full').style.display = 'inline'; document.getElementById('2401.16691v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.16691v2-abstract-full" style="display: none;"> Social physics explores responses to information exchange in a social network, and can be mapped down to bacterial collective signaling. Here, we explore how social inter-bacterial communication includes coordination of response to communication loss, as opposed to solitary searching for food, with collective response emergence at the population level. We present a 2-dimensional enclosed microfluidic environment that utilizes concentric rings of funnel ratchets, which direct motile E.coli bacteria towards a sole exit hole, an information ``black hole'', passage into the black hole irreversibly sweeps the bacteria away via hydrodynamic flow. We show that the spatiotemporal evolution of entropy production reveals how bacteria avoid crossing the hydrodynamic black hole information horizon. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.16691v2-abstract-full').style.display = 'none'; document.getElementById('2401.16691v2-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0306125">arXiv:physics/0306125</a> <span> [<a href="https://arxiv.org/pdf/physics/0306125">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> The Autohumidification Polymer Electrolyte Membrane Fuel Cell </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Benziger%2C+J+B">J. B. Benziger</a>, <a href="/search/physics?searchtype=author&query=Moxley%2C+J">J. Moxley</a>, <a href="/search/physics?searchtype=author&query=Tulyani%2C+S">S. Tulyani</a>, <a href="/search/physics?searchtype=author&query=Turner%2C+A">A. Turner</a>, <a href="/search/physics?searchtype=author&query=Bocarsly%2C+A+B">A. B. Bocarsly</a>, <a href="/search/physics?searchtype=author&query=Kevrekidis%2C+Y+G">Y. G. Kevrekidis</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="physics/0306125v1-abstract-short" style="display: inline;"> A PEM fuel cell was specially constructed to determine kinetics under conditions of well-defined gas phase composition and cell temperature. Steady state multiplicity was discovered in the autohumidification PEM fuel cell, resulting from a balance between water production and water removal. Ignition was observed in the PEM fuel cell for a critical water activity of about 0.1. Ignition is a conse… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0306125v1-abstract-full').style.display = 'inline'; document.getElementById('physics/0306125v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0306125v1-abstract-full" style="display: none;"> A PEM fuel cell was specially constructed to determine kinetics under conditions of well-defined gas phase composition and cell temperature. Steady state multiplicity was discovered in the autohumidification PEM fuel cell, resulting from a balance between water production and water removal. Ignition was observed in the PEM fuel cell for a critical water activity of about 0.1. Ignition is a consequence of the exponential increase of proton conductivity with water activity, which creates an autocatalytic feedback between the water production and the proton conduction. The steady state current in the ignited state decreases with increasing temperature between 50 to 105 deg C. At temperatures greater than 70 deg C five steady states were observed in the PEM fuel cell. The steady state performance has been followed with variable load resistance and hysteresis loops have been mapped. The dynamics of transitions between steady states are slow about 10^3 to 10^4 s. These slow dynamics are suggested to result from a coupling of mechanical and chemical properties of the membrane electrode assembly due to swelling of the membrane with water absorption. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0306125v1-abstract-full').style.display = 'none'; document.getElementById('physics/0306125v1-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, 2003; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2003. </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">32 pages, 17 figures</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 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