Present: Bill G, Yosef Z, Roland H, Ken S, Peter D, Zach E, Steve B, Peter S, Federico C, Atul
Chair: Yosef Minutes: Bill [short agenda] * Peter S, request to add another plot for the Binary Black Hole example. Yosef, what about the ringdown ramping up at the end? Peter, just used the POWER routines. Choice of mass determines the timescale. Roland, M_Adm early is 1.0, or after GWs pass is 1.0. Either choice is defensible. LIGO and ET make the opposite choice. Style: Be Sensitive to blue-green color blindness; can google for color pallettes. Recent gnuplot (4 and beyond?) has good color palettes for that. * Steve, we have a replacement for cactuscode.org. Current one is on old system and full of stuff that no one wants to maintain. No one liked making it a sub-page off of ET. Ian Hinder built a version on GitHub on Jekyll and has some things missing. Need smaller, easier to maintain website. Yosef, if it is good enough and make it live and let the complainers help fix it. Steve, we should tweak a couple of things: there are a bunch of tickets that talk about what are wrong with it. Some issues to fix to make it live. https://test.cactuscode.org https://github.com/EinsteinToolkit/cactuscode.org/issues?q=is:open+is:issue+label:bug * Unanswered Questions mailing list o No one waiting for help. * Open tickets sorted by update time o Roland, #1717 from 2014, about libraries and automatic build which does not pick them up. Suggestion is to build dynamically, but then harder for systems that need static library building (Cray). Proper solution is to have the actual build stage of the libs return build variables. o #2448 remove the support_old_CalcTmunu_mechanism interface to Tmunu, probably the only thing that is visible to people. * Tickets ready for review Any comments? o Roland, a lot have existed for a while. Tmunu mentioned above. #2449 NewRad extrapolate the Gammas (Christoffel) from data interior to the boundary, there is code that grid has min size in all three Cartesian dimensions but fails with Cartoon2D because it will not have that many points (one interior)...because symmetry conditions. This should not do anything for a real run...you need five points. Only effects the extrapolation. o Roland, #2458 Simfactory Done for the correct date. These have a Pull Request and need someone to review the Pull Request. oo Current "policy": More things up for review than people willing to review them, typically if they are there for a while, 2 weeks put in "any suggestions" marker and after another two weeks tey are Pushed in the code. Pure enhancements are not treated this way. They need real second pair of eyes checking them out. o Yosef, should we assign reviewers? Roland, sure, I often give them to Steve to look at. A lot fo these are one line change. Bill will review #2458, Simfactory Done with time. Steve, #2389 make error messages better for checkpoint files, this looks good to him. Steve logged in to the Pull Request and approved the changes. * Working group reports o Zach's IllinoisGRMHD WG update: IllinoisGRMHD is getting a more robust conservative-to-primitives solver, more along the lines of what HARM does. Basically IllinoisGRMHD evolves the entropy as an additional conservative variable, and uses this new variable when the usual conservative-to-primitive solver fails. This adds robustness to modeling highly magnetized, relativistic fluid flows. We'd like to make this update public in a month or so... everything is implemented and we're debugging now. o No other groups reporting. * Other business o Ken Sibel, post-bac researcher with Zach, and will be applying to grad school for CS. Did all the work on the early version on NRPy LaTeX interpreter. Next week may have latest bits in place. REady for testing/experimentation in notebooks. Insert LaTeX equations and will output symbolic expressions for Mathematica and for Pythone etc. Next project is GPU support in NRPy. o Atul, announcement of the virtual conference "Midwest Relativity Meeting 2020"---is the 30th year, Oct 22-24, 2020. Hosted by Notre Dame. Topics from grav physics, num rel, rel astrophysics, cosmology. Abstract submission is open. Can I send an email to the user list. * People to run the call... o Have next weeks volunteers. o Sept 17th: chair Peter D, minutes Steve -- ===================================== William Gabella Research Assistant Professor Department of Physics and Astronomy Vanderbilt University Nashville, TN USA [email protected] (o) 615-343-2713
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