User: rhaas Date: 2013/12/18 03:01 PM
Added: /seminars/2013_10_14/ Zachariah_Etienne.jpg, index.php /seminars/2013_10_14/recording/ 2013_10_14.mp4, 2013_10_14.ogv
Modified: /seminars/ index.php
Log: add seminar on 2013_10_14
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File [added]: index.php Delta lines: +68 -0 =================================================================== --- seminars/2013_10_14/index.php (rev 0) +++ seminars/2013_10_14/index.php 2013-12-18 21:01:54 UTC (rev 1121) @@ -0,0 +1,68 @@ +<?php $title='A conservation law formulation of nonlinear elasticity in general relativity'; +include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?> + +<h3>Monday, October 14, 2013, 10am US central time</h3> +<p>The <a href="http://horizon.tapir.caltech.edu/demo/einsteintoolkit.jsp"><i +>Einstein Toolkit</i></a> BigBlueButton meeting was be used for audio and slides. The +slides are available as <a href="IllinoisGRMHD.pdf">pdf</a>, and the recordings are +available in <a href="recording/2013_10_14.ogv">Theora</a> or +<a href="recording/2013_10_14.mp4">MP4</a> format.. +</p> + + +<h3>Abstract</h3> +<p> +After months of work, I am pleased to release my rewrite of the Illinois +numerical relativity group's staggered A-field GRMHD thorn to the ET +community. The new thorn is called IllinoisGRMHD, and yields results +identical (within roundoff error) to the original GRMHD code of the +Illinois group with AMR & unigrids, with bitant symmetry & without, and +with single or multiple MPI processes. We used precisely these GRMHD +algorithms to produce our latest GRMHD-based papers. + +IllinoisGRMHD is written entirely in C, except for some C++ file I/O for +debugging purposes, and all loops are OpenMP-compatible. The coding +standard is C99. + +I would like to thank Frank and the CCT folks, who have graciously agreed +to host IllinoisGRMHD on the ET SVN server, as the thorn awaits +maintainers' approval for incorporation into the official ET. + +Download IllinoisGRMHD via the following command: +<pre> +svn co https://svn.einsteintoolkit.org/cactus/EinsteinEvolve/IllinoisGRMHD/trunk/ +</pre> + +<a href="https://svn.einsteintoolkit.org/cactus/EinsteinEvolve/IllinoisGRMHD/trunk/">Browse</a> IllinoisGRMHD source code in your web browser. +</p> + +<h4>Background</h4> +<p> +Roughly a decade of work has gone into the original code, and nearly all of +the credit for debugging that battle-hardened code goes to Stu Shapiro and +other former & current members of his group, to whom I give my great thanks +and send the following message: Despite weeks entirely devoted to debugging +this rewritten code, I found no major bugs in the original code. +</p> + +<h4>License</h4> +<p> +The IllinoisGRMHD thorn is hereby released under the GNU GPL v2 or higher, +to maximize compatibility with the ET thorns. +</p> + +<h3>Presenter: Zachariah Etienne</h3> +<img src="Zachariah_Etienne.jpg" width="20%" align="right" alt="Zachariah Etienne"> +<p> +NSF Astronomy & Astrophysics Postdoctoral Fellow, University of Illinois +</p> +<p> +Numerical Relativity Group Research interests: My research interests span all +of computational astrophysics. Much of my past work has focused on simulating +the mergers of compact binary systems, including BHNS, BHBH, WDNS, and NSNS. My +current work focuses on BHBH mergers, as well as studying MHD effects in BHNS +mergers. +</p> + + +<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?>
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File [modified]: index.php Delta lines: +3 -4 =================================================================== --- seminars/index.php 2013-12-13 18:45:05 UTC (rev 1120) +++ seminars/index.php 2013-12-18 21:01:54 UTC (rev 1121) @@ -14,16 +14,15 @@ <h3>Past Seminars</h3> <table border="1"> <tr><th>Date</th><th>Title</th><th>Presenter</th><th>Affiliation</th><th>Slides</th><th>Recording</th></tr> -<!-- <tr> <td>2013/10/14</td> <td><a href="2013_10_14/"></a></td> <td>Zachariah Etienne</td> <td>UMD</td> <td><a href="2013_10_14/etienne-et-2013_10_14.pdf">pdf</a></td> - <a href="2013_10_14/recording/2013_10_14.mp4">mp4</a> + <td><a href="2013_10_14/recording/2013_10_14.ogv">ogv</a> / + <a href="2013_10_14/recording/2013_10_14.mp4">mp4</a></td> </tr> ---> <tr> <td>2013/02/04</td> <td><a href="2013_02_04/">Three-Dimensional General-Relativistic Hydrodynamic Simulations of Binary Neutron Star Coalescence and Stellar Collapse with Multipatch Grids</a></td> @@ -44,7 +43,7 @@ <td>2011/11/28</td> <td><a href="2011_11_28/">Improved EM Gauge Condition for GRMHD Simulations with AMR</a></td> <td>Zachariah Etienne</td> - <td>University of Illinois</td> + <td>JSI fellow at U. Maryland & NASA Goddard</td> <td><a href="2011_11_28/EM_Gauge_ET.pdf">pdf</a></td> <td><a href="2011_11_28/recording/2011_11_28.ogv">ogv</a> / <a href="2011_11_28/recording/2011_11_28_evo.tar.xz">evo.tar.xz</a></td> </tr>