Events Archive

Jul
14
2014
Talk and Panel Discussion: Multi-messenger Astrophysics - Challenges and Opportunities in Big Data and Computing
Event Title:   Multi-messenger Astrophysics: Challenges and Opportunities in Big data and Computing    Summary Sentence:  a talk...
Jun
11
2014
Thermal Hadronic Properties and QCD Phase Transitions
After a general introduction to the Lagrangian of QCD (Quantum Chromodynamics) and its symmetries, I will present the QCD Sum Rules approach for studying hadronic properties. This will be generalized to a finite temperature scenario, where we expect that phase transitions like deconfinement and/or chiral symmetry restorations should occur. In particular we will present our results for the rho meson spectrum, reconstructed from the dimuon spectrum in heavy ion collisions, and for charmonium resonances which could survive beyond the critical temperature. I will try to avoid technical details,...
May
27
2014
The Polymer Physics of Disordered Protein Assemblies – Emergent Structure and Function
Intrinsically disordered proteins (IDPs), which form over a third of human proteins, challenge the structure-function paradigm because they function without ever folding into a unique three-dimensional structure. A particularly fascinating example of IDP function is the gating mechanism of the nuclear pore complex (NPC). The NPC is a large macromolecular structure that gates nanoscale pores in the nuclear envelope and controls all nucleo-...
May
19
2014
A variational theory of shearless transport barriers in unsteady dynamical systems
Note: This is a WEBINAR The theory of Lagrangian Coherent Structures (LCSs) has advanced significantly over recent years, and now covers both hyperbolic and elliptic material surfaces in unsteady flow. Parabolic (i.e., jet-type) LCSs have, however, remained outside the reach of the theory, despite their significance in oceanic and atmospheric transport. Here I discuss a new variational approach to general shearless transport barriers in two-dimensional unsteady flows, which covers both hyperbolic and parabolic LCSs. I also describe a computational implementation of this new...
Apr
30
2014
Diagnosis of Various Biofluid Flow Phenomena and Biomimic Research
Biological flows are vital for the conservation of life and indispensable commodity of living organisms. Morphological structures of living organisms and biological flow phenomena in...
Apr
24
2014
Production and decay of magnetic fields in relativistic turbulence
Given that many diverse astrophysical systems are susceptible to relativistic hydromagnetic turbulence, it is surprising how little is presently known about how they manifest chaotic flow. Of primary interest is to establish a basic understanding of how the small-scale turbulent dynamo, whereby kinetic energy of the flow is converted into magnetic energy, operates in these systems. This process is thought to be instrumental in both stellar and galactic magnetogenesis, and may also be at work in relativistic astrophysical jets and their central engines. ...
Apr
23
2014
Restricted diffusion in soft materials and elsewhere
Apr
21
2014
Spin transition in second Landau level
The fractional quantum Hall effect (FQHE) states in the second Landau level have attracted growing interests and intensive theoretical and experimental investigations due to them possibly being non-Abelian states. Recently, we systematically examined the spin polarization of the FQHE states in a series of high quality, low density two dimensional electron systems. Evidence of spin transition was observed, suggesting a more complicated nature of the FQHE ground states in the second Landau level.
Apr
16
2014
The Dynamical Structure of Electroconvecting Liquid Crystals
We utilize electroconvecting liquid crystal samples as a test bed from non-equilibrium driven systems. I will discuss results from the application of a novel mathematical analysis that incorporates time-delay embedding and diffusion maps to elucidate the underlying geometry in this system. This analysis permits the discrimination of different dynamical states from empirical data and is used to demonstrate multistability in this system. In addition we investigate the effects of an abrupt transition to defect turbulence on the structure and energy flow in this system.
Apr
15
2014
Supercomputing, Virtual screening and molecular discovery: methods, applications and challenges
We present and discuss, in the context of the drug discovery pipeline, recent computational developments that enable the virtual screening of massive databases of chemicals against a large number of protein structures. We present "ensemble docking" applications of virtual screening in multiple protein structures that identify new protein ligands and explore biochemical pathways. We also discuss fundamental and challenging aspects of these very large virtual screening approaches.

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