SLAC Today is available online at:
http://today.slac.stanford.edu
In this issue:
What Will GLAST Tell Us?
Safety Today: Walking Safely
WIS Lecture: Creating a Kindness Revolution
Statistics Lecture: Bootstrap Basics
Tuesday - January 23, 2007 |
What Will GLAST Tell Us?The identity of dark matterthe mysterious stuff that makes up a quarter of the universecontinues to elude scientists, even decades after they first inferred its existence. The leading candidate that might explain the fundamental make-up of dark matter is a hypothetical particle called the weakly interacting massive particle (WIMP). Soon, with the Gamma-Ray Large Area Telescope (GLAST) built in part at SLAC and scheduled for launch this Fall, scientists may finally find clear evidence that dark matter is indeed made of WIMPs. Gamma-raysthe most energetic form of lightoriginate from a multitude of mysterious sources, like black holes or exploding stars. But current theory suggests they can also come from WIMPs. Scientists believe WIMPs can interact with themselves, annihilating each other and releasing a flurry of secondary particles as well as gamma-rays. Using GLAST, scientists hope to find these high-energy signatures of dark matter in our galaxy. If they succeed, this discovery would help solve one of astronomy's grandest puzzles. "With GLAST, we hope to actually see individual dark matter annihilations," said Michael Peskin, professor of theoretical physics at SLAC. Ted Baltz, a Kavli Institute for Particle Astrophysics and Cosmology (KIPAC) researcher who also works on the GLAST project, added, "GLAST has the real possibility of making a fundamental contribution to understanding what galaxies are made of." Read more... |
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Walking SafelyStepping on a crack won't break your mother's back—but if you're not careful, it might break yours. We often forget that ever-lurking hazards, like stairs and uneven or slippery pavement, can cause serious injuries. Since October, five employees have fallen and injured themselves while walking at SLAC. "It's important for people to stay alert when walking, even when on routes they routinely use," Business Services Division ES&H Coordinator Rick Challman said. "Most accidents occur when employees are walking on site or going up and down stairs. The myth that 'office people' don't have accidents just isn't true." Most of these falls are attributed to inattention and wandering eyes. "Paying attention is very important. Employees should be keeping their eyes on the path and staying alert to avoid a slip, trip, or fall," Challman said. Though not all falls break bones, any injury requiring first aid care should be immediately treated at the SLAC Medical Center, located on the first floor of the Administration and Engineering building. Injuries should be reported to supervisors right away. The ES&H web-based Course 294 Walking and Work Surfaces is a recommended resource course for those who frequently walk around the site. |
WIS Lecture: Creating
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