The colloquia are held in Room 128 (old number: 114), Physics Building at 3:30 P.M. on Wednesdays unless noted otherwise (please see abstract for specific details). Tea and coffee is available before the colloquium in Room 128. Refreshments will be served after the colloquium (at around 5:00pm), and further discussions with the speaker are encouraged during this time. For additions, corrections, or questions please contact Cristin Paul at cristin.paul@duke.edu.