Past Events

  • Math-Bio Seminar: "Fluctuation and fixation in the Axelrod model"

    318 Carolyn Lynch Lab

    Nicolas Lanchier, Arizona State University

    The Axelrod model is a spatial stochastic model for the dynamics of cultures which includes two key social components: homophily, the tendency of individuals to interact more frequently with individuals who are more similar, and social influence, the tendency of individuals to become more similar when they interact. Each individual is characterized by a collection of opinions about different issues, and pairs of neighbors interact at a rate equal to the number of issues for which they agree, which results in the interacting pair agreeing on one more issue.

  • Math-Bio Seminar: "The joint total tree length at linked loci in populations of variable size"

    318 Carolyn Lynch Lab

    Matthias Steinrücken, University of Massachusetts Amherst

    The inference of historical population sizes from contemporary genomic sequence data has gained a lot of attention in recent years. A particular focus has been on recent exponential growth in humans. This recent growth has had a strong impact on the distribution of rare genetic variants, which are of particular importance when studying disease related genetic variation. The popular PSMC method (Li and Durbin, 2011) can be used to infer population sizes from a sample of two chromosomes.

  • Dissertation Defense: "Abelian Gauge Symmetries in F-theory and Dual Theories"

    David Rittenhouse Laboratory, 3W2

    Peng Song (UPenn)

  • Eli Burstein Lecture in Materials Science: "Jamming by Design"

    Towne Building (220 S 33rd Street), Heilmeier Hall Room 100

    Heinrich Jaeger (Chicago)

    In materials science, high performance is typically associated with structural regularity and order. This holds for traditional solids such as crystals as well as for many types of nanoscale devices. However, there are circumstances where disorder can be harnessed to achieve performance not possible with approaches based on regularity. Recent research has shown opportunities specifically for soft matter.

  • Dissertation Defense: "Black Holes and Conformal Symmetry"

    David Rittenhouse Laboratory, 2N36

    Zain Saleem (University of Pennsylvania)

  • Dissertation Defense: "Magnetic Fields in Molecular Clouds: The BLASTPol and BLAST-TNG Experiments"

    Singh Center, Glandt Forum

    Nicholas Galitzki (UPenn)

  • The Science Carnival at Penn's Landing

    Penn's Landing

    For the second year in a row, the department of Physics and Astronomy has been awarded one of Penn's six booths at the Carnival. We will talk to the public about the size and scale of planets and how big we think planet X might be. We will explore how large amounts of matter can gravitationally lens objects behind them giving us unique insight into far away galaxies and to explore the mass that is causing these disturbances and a few more demos

     

    For more information on the day's activities and what to expect, visit this link:

  • Science After Hours: Nerd Olympics at Franklin Institute

    The Franklin Institute

    Physics and Astronomy grad students will join the Franklin Institute to put on an evening of fun and science! We will be looking at spectral lines, learning about standard candles (how we measure how far away things are in astronomy) 

     

    To register and purchase tickets follow this link: 

    https://www.fi.edu/event/2016-04-29/science-after-hours

  • Robert Maddin Lecture in Materials Science: "Finding New Electronic Materials"

    The Glandt Forum Krishna P. Singh Center for Nanotechnology

    Robert J. Cava (Princeton)

    “New materials give new properties” is a phrase that I think best describes the goal of our research program.

  • Department Colloquium: "Wave Piloting in the Marshall Islands"

    David Rittenhouse Laboratory, A8

    Professor John Huth (Harvard) Hosted by: Professor Joe Kroll

    Of all the Pacific Island navigation cultures, the practice of wave piloting in the Marshall Islands is perhaps the most curious. Navigators observed the patterns of ocean swells to find their way among atolls and islands in outrigger canoes.  Over a century of colonial occupation stretched this tradition to near extinction. Captain Korent Joel is the only living Marshall Islander with the traditional credential of rimeto (navigator).