physics

Colloquium: Viscosity and Black Hole Physics

Dam Thanh Son, of University of Chicago, explores the theorist's relationship between viscosity and the physics of black holes.

UK Physics Professor Discovers Important Experimental Result

University of Kentucky physics Professor Tim Gorringe's research collaboration has recently gained attention for an important experimental result.

Colloquium: Viscosity, Quark Gluon Plasma, and String Theory

Viscosity, quark gluon plasma, and string theory

Viscosity is a very old concept which was introduced to physics by Navier in the 19th century. However, in strongly coupled systems, viscosity is difficult to compute from first principle. In this talk I will describe some recent surprising developments in string theory which allow one to compute the viscosity for a class of strongly interacting quantum fluids not too dissimilar to the quark gluon plasma. I will describe efforts to measure the viscosity and other physical properties of the quark gluon plasma created in relativistic heavy ion collisions.

Cosmic Linear Accelerators: Extreme Reconnection and other Surprises from the Crab Nebula

The unexpected discovery of gamma-ray flares from the Crab Nebula may have surprising implications for plasma astrophysics. Standard particle acceleration mechanisms cannot account for the energies of the flaring photons. Instead, these observations point toward an acceleration process involving rapid destruction of magnetic field through reconnection. I will discuss the extreme particle acceleration process that may lead to the flares, and the likely role of current-driven instabilities in triggering reconnection in the Crab and elsewhere.

Colloquium: Glimpsing Color in the World of Black and White

Glimpsing color in a world of black and white

Protons, neutrons and all the many other strongly interacting subnuclear particles, known as hadrons, are made of quarks and gluons. These fundamental constituents are held together by a color force described by quantum chromodynamics (QCD). A detailed understanding of how the strong coupling regime of QCD, which is responsible for confinement and dynamical chiral symmetry breaking, determines the spectrum and structure of hadrons will be outlined. Such studies, both experimental and theoretical, color in the picture of strong dynamics. What we know now and the glimpses to come from accelerator facilities like that at Jefferson Lab will be described.

UKC 120: Physics of Energy with Joseph Straley

We hear a lot about "energy independence" and "renewable energy," but what do those terms actually mean? A class is being offered to answer these questions and introduce students to concepts and debates around energy: where it comes from, how we use it, and what the future of energy looks like.  

UKC120, “Physics of Energy,” will examine coal, oil, nuclear power, hydroelectricity, wind, and solar power. Professor Joseph Straley will teach the course, and in this podcast, he explains why learning about the "Physics of Energy" isn't just for aspiring physicists - and why it's important to understand energy from many academic perspectives. 

This podcast was produced by Cheyenne Hohman
 

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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

Higgs Discovery: Implications for Particle Physics - 2 Nov. 2012

The LHC has recently discovered a Higgs-like resonance with a mass of about 125 GeV. It may be the missing element of the so-called Standard Model of particle physics. This model was proposed a few decades ago, and, after the inclusion of neutrino masses, describes in an accurate way all measured observables not involving gravity. We shall discuss what are the possible implications of the Higgs Discovery for particle physics and, in particular, for theoretical and experimental physics High Energy Physics in the coming years.

From Voids to Clusters: Gas and Galaxy Evolution in the Local Universe - 12 Oct. 2012

Our understanding of the formation and evolution of galaxies and their large scale structure has advanced enormously over the last decade, thanks to an impressive synergy between theoretical and observational efforts. While the growth of the dark matter component seems well understood, the physics of the gas, during its accretion, removal and/or depletion is less well understood. Increasingly large scale optical surveys are tracing out the cosmic web of filaments and voids. Mathematical tools have been developed to describe these structures and to identify galaxies located in specific environments. HI imaging surveys begin to answer the question: how do galaxies get and lose their gas? The best evidence for ongoing gas accretion is found in the lowest density environments, while removal of gas in the highest density environments stops star formation and reddens the galaxies. Speaker: Jacquiline van Gorkom, Columbia University

Physics Professor Receives Early Career Research Award from Department of Energy

Physics Professor Christopher Crawford received a five-year grant from the U.S. Department of Energy's 2012 Early Career Research Program.

Under Review: Physics of an Anthony Davis Blocked Shot

Brad Plaster, an Associate Professor in UK's Department of Physics & Astronomy, describes how Newton's Laws are at work during an Anthony Davis blocked shot. For more videos please visit our Youtube channel at youtube.com/user/UKhive as.uky.edu

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