https://alivanderveld.com/projects/lossy-data-compression/https://alivanderveld.com/wp-content/uploads/2013/03/f7.jpgf7Shifts in the two components of ellipticity -- e1 (blue, dotted line) and e2 (black, dashed line) -- as a function of the mean e1 and e2, respectively, when the galaxies are sorted into five wide bins and the shifts (codec vs. original) are averaged, for the target level of data compression. For comparison, the same is plotted for e1 (green, solid line) and e2 (magenta, dot-dashed line) for a less-severe but insufficient codec.https://alivanderveld.com/wp-content/uploads/2013/03/f1.jpgf1A patch of a simulated image, shown on the top left before compression and shown on the top right after codec. The residuals (multiplied by a factor of 5 for clarity) are shown on the bottom.2013-04-30T20:12:58+00:00weekly0.6https://alivanderveld.com/projects/halo/https://alivanderveld.com/wp-content/uploads/2013/03/sim.pngsimhttps://alivanderveld.com/wp-content/uploads/2013/03/test.jpgtestThe Wallops Arc-Second Pointing system in a laboratory test with a mock telescope.https://alivanderveld.com/wp-content/uploads/2013/03/balloon.jpgballoonColumbia Scientific Balloon Facility2013-04-30T20:01:43+00:00weekly0.6https://alivanderveld.com/projects/weak-gravitational-lensing/https://alivanderveld.com/wp-content/uploads/2013/03/filter.jpgfilterhttps://alivanderveld.com/wp-content/uploads/2013/03/xip_comp.jpgxip_compPredictions for the shear two-point correlation function, showing the 68% and 95% confidence-level regions for both space-based (grey hatched) and ground-based (blue solid) source redshift distributions. Also shown are the data points from Schrabback et al. 2010 (black points) and Benjamin et al. 2007 (magenta points) with 1 sigma error bars.https://alivanderveld.com/wp-content/uploads/2013/03/dark-matter-map-copy.jpegdark-matter-maphttps://alivanderveld.com/wp-content/uploads/2013/03/wl.jpgweaklensing2013-04-30T19:54:12+00:00weekly0.6https://alivanderveld.com/projects/supernova-surveys-in-the-millennium-simulation/https://alivanderveld.com/wp-content/uploads/2013/03/poster_large.jpgposter_large2013-04-30T19:43:40+00:00weekly0.6https://alivanderveld.com/projects/segregation-and-violent-crime/https://alivanderveld.com/wp-content/uploads/2013/03/plot2.jpgplotViolent crime rate per 100,000 people for the calendar year 2011 plotted versus the segregation index, for cities with over 500,000 residents. The most notoriously-violent cities highlighted as the larger, colored dots: Chicago is blue, Detroit is red, Memphis is orange, and Baltimore is green.https://alivanderveld.com/wp-content/uploads/2013/03/chicago.jpgchicago2013-04-30T19:33:36+00:00weekly0.6https://alivanderveld.com/projects/astronomical-image-simulation/https://alivanderveld.com/wp-content/uploads/2013/03/galaxy.jpggalaxyhttps://alivanderveld.com/wp-content/uploads/2013/03/hudf.jpghudfHubble Ultra Deep Field2013-04-30T19:05:19+00:00weekly0.6https://alivanderveld.com/projects/dark-matter-black-holes/https://alivanderveld.com/wp-content/uploads/2013/03/mwcore_cxo_full.jpgmwcore_cxo_fullThe center of our galaxy, including the supermassive black hole Sagittarius A*, as viewed in the X-ray with the Chandra space telescope (Baganoff et al., CXC, NASA).2013-04-30T19:04:14+00:00weekly0.6https://alivanderveld.com/projects/2013-04-10T18:14:59+00:00weekly0.6https://alivanderveld.comdaily1.02013-04-30T20:12:58+00:00