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Events on Tuesday, March 15th, 2016

Chaos & Complex Systems Seminar
Coping with climate change and environmental degradation science, universities, and a great American challenge
Time: 12:05 pm
Place: 4274 Chamberlin Hall (refreshments will be served)
Speaker: Bernard Z. Friedlander and Noah M. Friedlander, University of Hartford
Abstract: Under pressures of Climate Change, national political stasis, and other potent factors, American universities, colleges, and schools face harsh challenges unlike any our professions have ever encountered. This is due largely to profound contradictions between national needs in our changing society and pressures within and between our varied and competing American sub-cultures. This presentation views the issues in four major categories: Evidence: facts about suppressive forces affecting science, academia, and education. Limited Time: an urgently critical factor. Suppressive Impacts: Climate Change and Environmental Degradation as force multipliers. Prescription: NEW WAYS TO EXPAND AN AGENDA FOR POSITIVE CHANGE.
Host: Clint Sprott
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Theory Seminar (High Energy/Cosmology)
Galaxy-galaxy lensing for cosmology in the Dark Energy Survey
Time: 3:30 pm
Place: 5280 Chamberlin Hall
Speaker: Juliana Kwan, University of Pennsylvania
Abstract: The Dark Energy Survey (DES) is an ongoing photometric survey that
will cover 5000 sq deg of the Southern sky over five years with the
aim of determining the origin of cosmic acceleration. Two of the key
probes involved in achieving this goal are the large scale clustering
of galaxies and weak gravitational lensing, which are more powerful
when taken in combination, since the dependence on galaxy bias can be
broken in both probes. Using the red galaxies identified in the Science
Verification area in DES, we have measured the angular clustering and
tangential shear from galaxy-galaxy lensing using red sequence
selected galaxies. In this talk, I will present constraints on the
dark energy equation of state and the amplitude of clustering from a
joint analysis of these probes.
Host: Amol Upadhye
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