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Chemical reaction rates using the semiclassical Van-Vleck initialvalue representation

Description: A semiclassical IVR formulation using the Van-Vleck propagator has been used to calculate the flux correlation function and thereby reaction rate constants. This Van-Vleck formulation of the flux-flux correlation function is computationally as simple as the classical Wigner model. However unlike the latter, it has the ability to capture quantum interference/coherence effects. Classical trajectories are evolved starting from the dividing surface that separates reactants and products, and are evo… more
Date: November 29, 2006
Creator: Venkataraman, Charulatha & Miller, William H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling the effects of prior infection on vaccine efficacy

Description: We performed computer simulations to study the effects of prior infection on vaccine efficacy. We injected three antigens sequentially. The first antigen, designated the prior, represented a prior infection or vaccination. The second antigen, the vaccine, represented a single component of the trivalent influenza vaccine. The third antigen, the epidemic, represented challenge by an epidemic strain. For a fixed vaccine to epidemic strain cross-reactivities to the vaccine and to the epidemic strai… more
Date: November 1, 1997
Creator: Smith, D. J.; Forrest, S.; Ackley, D. H. & Perelson, A. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experiments in non-perturbative electron beam characterization with the MIT microwiggler at the Accelerator Test Facility at BNL

Description: We report a new method through which the properties of an electron beam at linac energies may be studied using the spontaneous emission of a microwiggler. The setup is simple and the measurement efficient. A simple set of scaling laws is derived to describe broadening of spontaneous emission in a narrow bandwidth radiation cone. The relations suggest that one can obtain beam divergence from a cone at large angle in a single shot measurement. A systematic series of experiments was performed with… more
Date: November 1, 1996
Creator: Qiu, X.; Babzien, M.; Ben-Zvi, Ilan & Graves, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Adaptive heterogeneous multi-robot teams

Description: This research addresses the problem of achieving fault tolerant cooperation within small- to medium-sized teams of heterogeneous mobile robots. The author describes a novel behavior-based, fully distributed architecture, called ALLIANCE, that utilizes adaptive action selection to achieve fault tolerant cooperative control in robot missions involving loosely coupled, largely independent tasks. The robots in this architecture possess a variety of high-level functions that they can perform during … more
Date: November 1, 1998
Creator: Parker, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

L-ALLIANCE: a mechanism for adaptive action selection in heterogeneous multi-robot teams

Description: In practical applications of robotics, it is usually quite difficult, if not impossible, for the system designer to fully predict the environmental states in which the robots will operate. The complexity of the problem is further increased when dealing with teams of robots which themselves may be incompletely known and characterized in advance. It is thus highly desirable for robot teams to be able to adapt their performance during the mission due to changes in the environment, or to changes in… more
Date: November 1, 1995
Creator: Parker, L. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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