Condensed Matter Seminar: "The life of a vortex knot: Linking coiling and twisting across scales"
William Irvine, University of Chicago
Can you take a vortex loop - akin to a smoke ring in air - and tie it into a knot or a link? The possibility of such knottiness in a fluid has fascinated physicists and mathematicians ever since Kelvin¹s 'vortex…
An Introduction to Kirigami: Cutting, Folding, and Building with Triangles
Featuring Vicki and William Abrams Professor of the Natural Sciences Randall Kamien; Professor Shu Yang; Xingting Gong, C'15; Daniel Sussman; Toen Castle; and Michael Tanis, members of a research team from…
Quaker Days-Arts & Sciences Faculty Talks: "The Evolution of the Universe"
Professor Masao Sako (University of Pennsylvania)
talk will focus on Penn’s observational cosmology program and the mysteries we are hoping to solve within the next five years.turn determines its history and ultimate fate. What is the Universe made of? How was it…
Dissertation Defense: "Cerebral Blood Flow and Oxygen Metabolism Monitoring with Hybrid Diffuse Optical Techniques"
Wesley Baker (University of Pennsylvania)
The Henry Primakoff Lecture: Was Einstein Right? A Centennial Assessment
Clifford Will (University of Florida)
A century after Einstein's formulation of general relativity, a remarkably diverse set of precision experiments has established it as the ``standard model'' for gravitational physics. Yet it might not be the…
GR Math Seminar: "The graded Lie algebra of general relativity "
Michael Reiterer (IAS and Penn)
Several problems can be written as [x,x]=0 where the unknown x
is an element of degree one in a graded Lie algebra. I show that general
relativity (the Einstein vacuum equations) can also be put in…
Department Colloquium: The Cosmic Barber:"Counting Gravitational Hair in the Solar System and Beyond"
Clifford Will (University of Florida)
According to general relativity, every self-gravitating object has ``hair'', an array of multipole moments of various types that characterize the body's exterior geometry. In alternative theories of gravity,…
Dissertation Defense: "Single Cells Use Transcriptional Mechanisms to Compensate for Differences in Cell Size and DNA Content"
Olivia Padovan-Merhar (University of Pennsylvania)
Dissertation Defense: "Nano-Bio Hybrid Electronic Sensors for Chemical Detection and Disease Diagnostics"
Nicholas Kybert, University of Pennsylvania