4,139 research outputs found
Construction and Refinement of Coarse-Grained Models
A general scheme, which includes constructions of coarse-grained (CG) models,
weighted ensemble dynamics (WED) simulations and cluster analyses (CA) of
stable states, is presented to detect dynamical and thermodynamical properties
in complex systems. In the scheme, CG models are efficiently and accurately
optimized based on a directed distance from original to CG systems, which is
estimated from ensemble means of lots of independent observable in two systems.
Furthermore, WED independently generates multiple short molecular dynamics
trajectories in original systems. The initial conformations of the trajectories
are constructed from equilibrium conformations in CG models, and the weights of
the trajectories can be estimated from the trajectories themselves in
generating complete equilibrium samples in the original systems. CA calculates
the directed distances among the trajectories and groups their initial
conformations into some clusters, which correspond to stable states in the
original systems, so that transition dynamics can be detected without requiring
a priori knowledge of the states.Comment: 4 pages, no figure
Biological and biochemical characterization of clinical isolates of herpes simplex virus type 2 resistant to acyclovir
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Exponentiation of the Drell-Yan cross section near partonic threshold in the DIS and MSbar schemes
It has been observed that in the DIS scheme the refactorization of the
Drell-Yan cross section leading to exponentiation of threshold logarithms can
also be used to organize a class of constant terms, most of which arise from
the ratio of the timelike Sudakov form factor to its spacelike counterpart. We
extend this exponentiation to include all constant terms, and demonstrate how a
similar organization may be achieved in the MSbar scheme. We study the
relevance of these exponentiations in a two-loop analysis.Comment: 20 pages, JHEP style, no figure
In-situ Measurements of Stress During Thermal Shock in Clad Pressure Vessel Steel Using Synchrotron X-ray Diffraction
MC-Simulation of the Transverse Double Spin Asymmetry for RHIC
Using {\sc Sphinx tt}, a new MC simulation program for transverse polarized
nucleon--nucleon scattering based on {\sc Pythia~5.6}, we calculate the
transverse double spin asymmetry in the Drell-Yan process. If one
assumes (quite arbitrarily) that the transversity parton distribution equals the helicity distribution at some low
scale, the resulting asymmetry is of order 1\%. In this case is
would hardly be be measurable with PHENIX at RHIC.Comment: 17 pages, 5 figure
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