1. Explaining the Global Warming Theory

    40:50

    from UK College of Arts & Sciences Added 37 0 0

    Dr. Joseph P. Straley University of Kentucky Explaining the implications of science to contemporary public issues is an important part of our job. As an example I will give an introduction to the global warming issue.

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

      01:32:01

      from UK College of Arts & Sciences Added 36 0 0

      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

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      • LRSM 50th Anniversary Celebration: Andrea Liu

        15:34

        from Felice Macera Added 36 0 0

        On May 4, 2012, the Laboratory for Research on the Structure of Matter (LRSM) celebrated its 50th Birthday with a memorable event that attracted over 220 attendees from around the world. The celebratory symposium and dinner combined historical recollections with the current research at the LRSM. In this video is: Andrea Liu, Physics and Astronomy

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        • Joshua Lapan

          32:23

          from UK College of Arts & Sciences Added 35 0 0

          Joshua Lapan presenting at Great Lakes String 2013

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          • New Perspectives for QCD

            01:32:01

            from UK College of Arts & Sciences Added 35 0 0

            AdS/QCD, together with ``Light-Front Holography", provides an analytic, frame-independent color-confining first approximation to QCD, accounting for light-quark meson and baryon spectroscopy, hadronic form factors, and other hadronic observables. A remarkable holographic feature of hadron dynamics in AdS space in five dimensions is that it is dual to Hamiltonian theory in physical space-time, quantized at fixed light-front time. This light-front holographic principle provides a precise relation between the bound-state amplitudes in AdS space and the boost-invariant light-front wavefunctions describing the internal structure of hadrons in physical space-time. The hadronic eigensolutions of the light-front QCD Hamiltonian satisfy a single-variable relativistic equation of motion, analogous to the nonrelativistic radial Schr\"odinger equation. The color-confining potential is determined uniquely using a method based on conformally invariant quantum mechanics. The resulting potential is color-confining and reproduces the observed linear Regge behavior of the light-quark hadron spectrum in both orbital angular momentum and the radial node number. The pion mass vanishes in the chiral limit, and other features of chiral symmetry are satisfied. The elastic and transition form factors of the pion and the nucleons are also found to be well described in this framework. A number of novel phenomenological consequences will be discussed, including hadronization at the amplitude level.

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            • Black Holes: Probes of the Cosmos and Fundamental Physics

              01:32:01

              from UK College of Arts & Sciences Added 35 0 0

              The class of spacetimes with event horizons contain some of the most fascinating solutions to the equations of general relativity. Over the past few years, numerical simulations have begun to reveal many dynamical, strong-field solutions not amenable to exact analytical or perturbative treatments. In this talk, I will describe 3 such scenarios. First, the inspiral and merger of two black holes, which is thought to occur frequently in the universe. Such events are powerful emitters of gravitational waves, and a concerted world-wide effort is currently underway to observe them. Second, I will discuss the ultra-relativistic collision of two solitons. Arguments suggest that at sufficiently high velocities gravity dominates the interaction, causing a black hole to form. These arguments underlie claims that the Large Hadron Collider, or cosmic ray collisions with the Earth, will produce black holes in speculative large extra dimension scenarios. Finally, I will show results elucidating the fate of a black string in 5 dimensions, subject to the Gregory-Laflamme instability. Rather remarkably, the event horizon exhibits dynamics akin to a low viscosity fluid stream suffering the Raleigh-Plateau "beading" instability. In the gravitational process arbitrarily large spacetime curvatures are revealed to an external observer, culminating in naked singularities.

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              • Diptarka Das

                26:03

                from UK College of Arts & Sciences Added 35 0 0

                Diptarka Das presenting at Great Lakes String 2013

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                • Quantum Mechanics and the Geometry of Spacetime

                  57:38

                  from UK College of Arts & Sciences Added 34 0 0

                  Juan Maldacena Institute for Advanced Study, Princeton

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                  • Undergraduate Research at UK

                    04:29

                    from UK College of Arts & Sciences Added 34 0 0

                    Students, as well as A&S faculty members Chris Crawford (Physics) and Melody Carswell (Psychology) talk about the undergraduate research opportunities at UK. This video appears courtesy of Reveal: University of Kentucky Research Media http://www.research.uky.edu/reveal/index.shtml

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                    • Samir Mathur

                      46:22

                      from UK College of Arts & Sciences Added 34 0 0

                      Samir Mathur presenting at Great Lakes Strings 2013.

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