All posts by John Wise

Associate Professor in Physics at Georgia Tech
Notes

Talk: GRBs – Recent developments from Fermi

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Peter Mészáros (PSU)
  • Are the photons from leptonic or hadronic origin?  X-ray to radio: leptonic, MeV: probably leptonic; GeV: debated.
  • GRBs are a possible origin for ultra-high energy cosmic rays.  For gravitational waves, theoretically but not detected yet.
  • GRB 080916c: Adbo+ (2009, Science, 323, 1688): GeV photons "lag" behind MeV photons.  Why?
  • (Jacob & Piran 2008): Quantum gravity?  Energy-dependent … Continue Reading ››
astro-ph

05 Oct 2011

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  • (abs, pdf) Rocha et al., Infall Times for Milky Way Satellites From Their Present-Day Kinematics
  • (abs, pdf) Trenti et al., Overdensities of Y-dropout Galaxies from the Brightest-of-Reionizing Galaxies Survey: A Candidate Protocluster at Redshift z~8
  • (abs, pdf) Petkova & Maio, Radiative feedback on early molecular gas and implications for primordial structure … Continue Reading ››
Notes

GPU Meeting (04 Oct 2011)

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Lionel London (CRA) – GPU Computing in Matlab
  • Matlab Parallel Computing Toolbox (PCT) vs. Jacket
  • PCT allows for multi-cpu and GPU computing. Limited to 12 cores on the local machine. Very high level.
  • GPU computing with PCT requires an nVidia card with v1.3 compute capabilities. GPGPU with Jacket has relaxed requirements but is very expensive ($4k for 5 … Continue Reading ››
Notes

Discussion: Doing Science in the Open

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Michael Nielsen Yesterday I attended a discussion with Michael Nielsen and the GT faculty, where open science was the subject.  We covered various venues for promoting collaborative science projects.  Some were completely new to me.  Let's cover a few examples that were discussed.

Crowd-sourcing

The ASSET India Foundation aims to educate and provide better opportunities for … Continue Reading ››