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Physical Sciences and Mathematics Commons

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1985

Selected Works

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Articles 1 - 24 of 24

Full-Text Articles in Physical Sciences and Mathematics

Quantum Electrodynamics At Finite Temperature, Jf Donoghue, Br Holstein, Rw Robinett Oct 1985

Quantum Electrodynamics At Finite Temperature, Jf Donoghue, Br Holstein, Rw Robinett

Barry R Holstein

We present a systematic examination of finite temperature effects in quantum electrodynamics at one loop order. We calculate mass, charge, and wavefunction renormalization, demonstrate the running of the coupling constant at high temperatures, and study the renormalized vertex function and the energy momentum tensor. The confusion in the literature concerning the finite temperature corrections to the electron's magnetic moment is resolved. We also present the finite temperature effects in scalar electrodynamics. Throughout we stress the need to provide a well-defined method to observe a given quantity when interpreting the results of a calculation, and we suggest new techniques which incorporate …


Spectral Properties Of Percolating Central Force Elastic Networks, Anthony Day, R. Tremblay, A.-M. Tremblay Sep 1985

Spectral Properties Of Percolating Central Force Elastic Networks, Anthony Day, R. Tremblay, A.-M. Tremblay

Anthony Roy Day

The exponent describing the low frequency spectrum of vibrations for the central force universality class is computed with both the Coherent Potential Approximation and numerical simulations. The results of both calculations agree surprisingly well.


Reanalysis Of Higgs-Boson-Exchange Models Of Cp Violation, Jf Donoghue, Br Holstein Aug 1985

Reanalysis Of Higgs-Boson-Exchange Models Of Cp Violation, Jf Donoghue, Br Holstein

Barry R Holstein

We reexamine the value of ɛ'/ɛ in models where CP violation is due to the exchange of charged Higgs bosons. Previous work has been flawed by incorrect treatment of the chiral properties of weak amplitudes. We use the effective-chiral-Lagrangian framework to clear up these aspects. The resultant value of ɛ'/ɛ is estimated to be in the neighborhood of ɛ'/ɛ=-0.006, although this estimate could be off by a factor of two or three in either direction. This value is consistent with the present experimental bounds.


Evaluation Of Electrochemical Kinetic Parameters Using The Bond-Henderson-Oldham Global Analysis, Dennis Evans, Mark Anderson Aug 1985

Evaluation Of Electrochemical Kinetic Parameters Using The Bond-Henderson-Oldham Global Analysis, Dennis Evans, Mark Anderson

Mark R. Anderson

No abstract is currently available.


Behavior Of An Electron In Helium Gas, John Bartholomew, Randall W. Hall, Bruce J. Berne Jun 1985

Behavior Of An Electron In Helium Gas, John Bartholomew, Randall W. Hall, Bruce J. Berne

Randall W. Hall

A quantum-mechanical electron in dense helium gas is examined by computer simulation using realistic, soft potentials. The behavior of the system is observed as the density is increased; there are indications that the electron (at least partially) localizes and forms a bubblelike state.


Predictors Of Grades In General Chemistry For Allied Health Students, Chris Craney, R. Armstrong Jan 1985

Predictors Of Grades In General Chemistry For Allied Health Students, Chris Craney, R. Armstrong

Chris L. Craney

Study searching for an effective predictor of student performance in the first term of a full-year general chemistry sequence for allied health students.


Electrochemical Reduction Of 1,1,4,4-Tetraphenylbutatriene In Dimethylformamid, Dennis Peters, Mark Anderson, Tsu-Yu Chen Jan 1985

Electrochemical Reduction Of 1,1,4,4-Tetraphenylbutatriene In Dimethylformamid, Dennis Peters, Mark Anderson, Tsu-Yu Chen

Mark R. Anderson

No abstract is currently available.


Gravitational Twins Revisited, Br Holstein Dec 1984

Gravitational Twins Revisited, Br Holstein

Barry R Holstein

No abstract provided.


Possible Weak Interaction Experiments With Polarized He-3, Br Holstein Dec 1984

Possible Weak Interaction Experiments With Polarized He-3, Br Holstein

Barry R Holstein

No abstract provided.


Uncertainty And Policy Agressiveness, Douglas Steigerwald, Roger Craine Dec 1984

Uncertainty And Policy Agressiveness, Douglas Steigerwald, Roger Craine

Douglas G. Steigerwald

How should a decision maker proceed with uncertain knowledge of the decision outcome? We use the unknown coefficient control problem to shed light on the issue.


Forced Harmonic-Oscillator - A Path Integral Approach, Br Holstein Dec 1984

Forced Harmonic-Oscillator - A Path Integral Approach, Br Holstein

Barry R Holstein

The problem of the harmonic oscillator driven by an external force is explored using path integral techniques. The qualitative features of the solution are demonstrated.


Evaluation Of Electrochemical Kinetic Parameters Using The Bond-Henderson-Oldham Global Analysis, Dennis Evans, Mark Anderson Dec 1984

Evaluation Of Electrochemical Kinetic Parameters Using The Bond-Henderson-Oldham Global Analysis, Dennis Evans, Mark Anderson

Mark R. Anderson

No abstract is currently available.


Semileptonic Hyperon Decay - A Problem For Chiral Perturbation-Theory, Jf Donoghue, Br Holstein Dec 1984

Semileptonic Hyperon Decay - A Problem For Chiral Perturbation-Theory, Jf Donoghue, Br Holstein

Barry R Holstein

We study the recently computed mk2lnm2k corrections to hyperton beta decay found in chiral perturbation theory. The inclusion of these effects is not compatible with the high precision hyperon data, yielding a fit much inferior to the standard assumption of SU(3) invariance. This incompatibility of data and theory is a problem for the application of chiral perturbation theory.


Viscosity Measurements In Dilute Helium-3-Helium-4 Mixtures, George Schmiedeshoff Dec 1984

Viscosity Measurements In Dilute Helium-3-Helium-4 Mixtures, George Schmiedeshoff

George Schmiedeshoff

We have measured the viscosity of a dilute mixture of 3He in 4He at temperatures from 5 to 100 mK and in magnetic fields of 0.35, 2.01 and 8.76 T using a vibrating wire viscometer. Subject to our choice of calibration function, the data at 0.35 T is in good agreement with theory. Due to an interaction of our viscometer with the magnetic field the motion of the wire at 2.01 and 8.76 T is not understood; however, the 2.01 T data can be brought into agreement with the 0.35 T data by adjusting a geometrical constant. An increase in …


Quantitative Evaluation Of Enhancement Techniques, B. L. Deekshatulu, Arun D. Kulkarni, G. Kashipati Rao Dec 1984

Quantitative Evaluation Of Enhancement Techniques, B. L. Deekshatulu, Arun D. Kulkarni, G. Kashipati Rao

Arun Kulkarni

Enhancement techniques are often used in image processing. In this paper, a quantitative measure of the image quality through evaluation of the coefficient of information content and the entropy has been suggested to evaluate the effect of enhancement. The image has been assumed to be a sample function of a homogeneous random field and the pixel values are estimated from the ‘past’ pixel values. The difference between the estimated value and the actual value of the pixel has been used as the criterion for defining the coefficient of information content. Also, the entropy obtained using the co-occurrance matrix of the …


Existence Of Global Solutions With Prescribed Asymptotic Behavior For Nonlinear Differential Equations, William F. Trench Dec 1984

Existence Of Global Solutions With Prescribed Asymptotic Behavior For Nonlinear Differential Equations, William F. Trench

William F. Trench

No abstract provided.


On The Eigenvalue Problem For Toeplitz Matrices Generated By Rational Functions, William F. Trench Dec 1984

On The Eigenvalue Problem For Toeplitz Matrices Generated By Rational Functions, William F. Trench

William F. Trench

We give formulas for the characteristic polynomial and eigenvectors of of $n\times n$ Toeplitz matrices generated by a formal Laurent series of a rational function $R(z)$. The formulas are in terms of a certain fixed polynomial with coefficients that are simple functions of $\lambda$ and the coefficients of $R(z)$. The complexity of the formulas is independent of $n$.


Cognitive Coordinate Systems: Accounts Of Mental Rotation And Individual Differences In Spatial Ability, Marcel Adam Just, Patricia A. Carpenter Dec 1984

Cognitive Coordinate Systems: Accounts Of Mental Rotation And Individual Differences In Spatial Ability, Marcel Adam Just, Patricia A. Carpenter

Marcel Adam Just

No abstract provided.


Functional Perturbations Of Second Order Differential Equations, William F. Trench Dec 1984

Functional Perturbations Of Second Order Differential Equations, William F. Trench

William F. Trench

No abstract provided.


Explicit Inversion Formulas For Toeplitz Band Matrices, William F. Trench Dec 1984

Explicit Inversion Formulas For Toeplitz Band Matrices, William F. Trench

William F. Trench

No abstract provided.


Linear Perturbations Of General Disconjugate Equations, William F. Trench Dec 1984

Linear Perturbations Of General Disconjugate Equations, William F. Trench

William F. Trench

No abstract provided.


Eventual Disconjugacy Of A Linear Differential Equation Ii, William F. Trench Dec 1984

Eventual Disconjugacy Of A Linear Differential Equation Ii, William F. Trench

William F. Trench

No abstract provided.


On $T_\Infty$ Quasi-Similarity Of Linear Systems, William F. Trench Dec 1984

On $T_\Infty$ Quasi-Similarity Of Linear Systems, William F. Trench

William F. Trench

No abstract provided.


On The Eigenvalue Problem For Toeplitz Band Matrices, William F. Trench Dec 1984

On The Eigenvalue Problem For Toeplitz Band Matrices, William F. Trench

William F. Trench

No abstract provided.