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1984

Physical Sciences and Mathematics

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Renormalization Of The Energy-Momentum Tensor And The Validity Of The Equivalence Principle At Finite Temperature, Jf Donoghue, Br Holstein, Rw Robinett Dec 1984

Renormalization Of The Energy-Momentum Tensor And The Validity Of The Equivalence Principle At Finite Temperature, Jf Donoghue, Br Holstein, Rw Robinett

Barry R Holstein

Using the techniques of finite-temperature field theory we renormalize the electromagnetic and gravitational couplings of an electron which is immersed in a heat bath with T

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Software And Development Process Quality Metrics, Robert Yacobellis Dec 1983

Software And Development Process Quality Metrics, Robert Yacobellis

Robert H Yacobellis

No abstract provided.

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Possibilities For Finite Grand Unification With N = 2 Supersymmetry, Asim Gangopadhyaya Dec 1983

Possibilities For Finite Grand Unification With N = 2 Supersymmetry, Asim Gangopadhyaya

Asim Gangopadhyaya

We study the prospects for constructing finite grand unified theories using softly broken N = 2 global supersymmetry. The requirement that the supersymmetry breaking scale be of order 103−104 GeV and that the mixing between the observed light fermions and the mirror fermions present in N = 2 theories be small («mW), make it difficult to construct finite grand unified theories based on a large class of simple groups with a realistic symmetry breaking pattern.

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Method And Apparatus For Division Employing Associative Memory Us:4466077, Robert Iannucci, James Kleinsteiber Dec 1983

Method And Apparatus For Division Employing Associative Memory Us:4466077, Robert Iannucci, James Kleinsteiber

Robert A Iannucci

No abstract provided.

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Topoi And Categories Of Fuzzy Sets, Lawrence Stout Dec 1983

Topoi And Categories Of Fuzzy Sets, Lawrence Stout

Lawrence N. Stout

Let H be a completely distributive lattice and hence a Heyting algebra. Goguen's category of fuzzy sets Set(H) Eytan's logos Fuz(H) and the topos of sheaves on H, Sh(H), are interconnected by pairs of adjoint functors between them. Each of the categories has a predicate calculus. These predicate calculi are related through the functors between the categories. Change of base lattice gives rise to several functors which preserve or reflect specific kinds of statements in the predicate calculi. This paper gives details of the categories, the predicate calculi attached to them, the functors between the categories, and the preservation properties …

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Predicting The Proton Mass From Pi-Pi-Scattering Data, Jf Donoghue, E Golowich, Br Holstein Dec 1983

Predicting The Proton Mass From Pi-Pi-Scattering Data, Jf Donoghue, E Golowich, Br Holstein

Barry R Holstein

We relate experimental information on ππ scattering to tree-level effective chiral Lagrangians. The result is of a form similar to that used in Skyrme-type models of the proton, where the nucleons are described as topologically stable solitons of the chiral fields. In such models, one can express the proton mass in terms of measured scattering data, with the result Mp=880±300 MeV. We interpret this as a consistency test for the Skyrme models.

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Chemistry Of Singlet Oxygen. 47. 9,10-Dicyanoanthracene-Sensitized Photooxygenation Of Alkyl-Substituted Olefins, Thomas Goyne, Yasuhiko Araki, Diane Dobrowolski, Douglas Hanson, Zhi Jiang, Kenneth Lee, Christopher Foote Dec 1983

Chemistry Of Singlet Oxygen. 47. 9,10-Dicyanoanthracene-Sensitized Photooxygenation Of Alkyl-Substituted Olefins, Thomas Goyne, Yasuhiko Araki, Diane Dobrowolski, Douglas Hanson, Zhi Jiang, Kenneth Lee, Christopher Foote

Thomas Goyne

No abstract provided.

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Nonergodicity In Path Integral Molecular Dynamics, Randall W. Hall, B. J. Berne Dec 1983

Nonergodicity In Path Integral Molecular Dynamics, Randall W. Hall, B. J. Berne

Randall W. Hall

Molecular dynamics can be used to evaluate the path integral representation of the density matrix. Implicit in this method is the assumption that the dynamical system is ergodic. It is shown here that this is not the case in many systems that are of interest. For example water or liquid neon can not be simulated by this method. Monte Carlo methods do not suffer from this weakness.

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A Path Integral Monte Carlo Study Of Liquid Neon And The Quantum Effective Pair Potential, Devarajan Thirumalai, Randall W. Hall, Bruce J. Berne Dec 1983

A Path Integral Monte Carlo Study Of Liquid Neon And The Quantum Effective Pair Potential, Devarajan Thirumalai, Randall W. Hall, Bruce J. Berne

Randall W. Hall

The path integral Monte Carlo (PIMC) method is used to simulate liquid neon at T=40 K. It is shown that quantum effects are not negligible and that when the quantum effective pair potential is used in a classical molecular dynamics simulation the results obtained for the radial distribution function agrees with that predicted by a full path integral Monte Carlo simulation. The validity of this procedure is further shown by comparing the results obtained by this method to experimental measurements of liquid neon at T=35 K.

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