Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Faculty Publications

Discipline
Institution
Keyword
Publication Year
File Type

Articles 21031 - 21060 of 21831

Full-Text Articles in Entire DC Network

The Classroom Climate: Encouraging Student Involvement, Stephanie M. Wildman Jan 1988

The Classroom Climate: Encouraging Student Involvement, Stephanie M. Wildman

Faculty Publications

No abstract provided.

Go to article

Limits On »Raquo;E Oscillations, L. S. Durkin, R. W. Harper, T. Y. Ling, J. W. Mitchell, T. A. Romanowski, E. S. Smith, M. Timko, S. J. Freedman, J. Napolitano, B. K. Fujikawa, R. Mckeown, K. T. Lesko, W. C. Choi, A. Fazely, R. L. Imlay, W. J. Metcalf, R. D. Carlini, J. B. Donahue, G. T. Garvey, V. D. Sandberg Jan 1988

Limits On »Raquo;E Oscillations, L. S. Durkin, R. W. Harper, T. Y. Ling, J. W. Mitchell, T. A. Romanowski, E. S. Smith, M. Timko, S. J. Freedman, J. Napolitano, B. K. Fujikawa, R. Mckeown, K. T. Lesko, W. C. Choi, A. Fazely, R. L. Imlay, W. J. Metcalf, R. D. Carlini, J. B. Donahue, G. T. Garvey, V. D. Sandberg

Faculty Publications

The result of a search for the neutrino oscillation mode »raquo;e in a fine-grained tracking detector is reported. The average neutrino energy is 40 MeV and the average detector distance from the neutrino source is 26.8 m. No evidence for neutrino oscillations through this mode is observed. Limits on m2 and sin2(2) are presented. © 1988 The American Physical Society.

Go to article

Thermal Properties Of A Series Of Side-Chain Liquid Crystalline Poly(Methacrylates)., R. Duran, D. Guillon, Ph Gramain, A. Skoulios Jan 1988

Thermal Properties Of A Series Of Side-Chain Liquid Crystalline Poly(Methacrylates)., R. Duran, D. Guillon, Ph Gramain, A. Skoulios

Faculty Publications

The thermal behavior of a series of side-chain liquid crystalline poly(methacrylates) has been investigated by thermogravimetry, differential scanning calorimetry, polarizing optical microscopy, and dilatometry. The DSC study has shown that long times are required to reach equilibrium even at temperatures above the glass transition. The thermotropic polymorphism has been determined as a function of the length of the flexible spacer. Glass transitions in the mesomorphic state have been discussed. Dilatometry has shown that, for the 'glassy' mesomorphic phases, the partial specific volume of the flexible spacer is close to that corresponding to the crystal and the isotropic liquid; and that, …

Go to article

Allochares Azureus: An Unusual Wasp Exploits Unusual Prey (Hymenoptera: Pompilidae; Arachnida: Filistatidae), Mark Deyrup, James T. Cronin, Frank E. Kurczewski Jan 1988

Allochares Azureus: An Unusual Wasp Exploits Unusual Prey (Hymenoptera: Pompilidae; Arachnida: Filistatidae), Mark Deyrup, James T. Cronin, Frank E. Kurczewski

Faculty Publications

No abstract provided.

Go to article

Landau-Level Width: Magnetic-Field And Temperature Dependences, Lipo Wang, R. F. Oconnell Jan 1988

Landau-Level Width: Magnetic-Field And Temperature Dependences, Lipo Wang, R. F. Oconnell

Faculty Publications

We calculate the effect of level broadening on the steady part of the magnetic moment and specific heat by deriving an analytic expression for the free energy of a two-dimensional electron gas in a uniform magnetic field, with an arbitrary Landau-level broadening and at a finite temperature. Measurements of these effects may provide a new way for gaining more information about the magnetic-field and temperature dependences of the Landau-level width. This in turn may lead to information about the density of states. In the particular case of Gaussian broadening, the broadening correction to the steady magnetic moment is as large …

Go to article

Protein Solubility, In Vitro Ammonia Concentration, And In Situ Disappearance Of Extruded Whole Cottonseed And Other Protein Sources, J. A. Stutts, W. A. Nipper, R. W. Adkinson, J. E. Chandler, A. S. Achacoso Jan 1988

Protein Solubility, In Vitro Ammonia Concentration, And In Situ Disappearance Of Extruded Whole Cottonseed And Other Protein Sources, J. A. Stutts, W. A. Nipper, R. W. Adkinson, J. E. Chandler, A. S. Achacoso

Faculty Publications

Whole cottonseed extruded at temperatures (°C) and rates (kg/h) of 131, 314; 135, 182; 146, 195; and 156, 286 was evaluated by protein solubility, in vitro ammonia concentration, and in situ disappearance techniques. These techniques were used to estimate potential of extruded whole cottonseed for protein escape from the rumen. In addition, raw whole cottonseed, soybean meal, corn gluten meal, and whole cottonseed and soybean meal heated for 4 h at 127, 138, and 149°C were used for comparison. Solubility was by three methods: cold water mixed for 30 min, cold water homogenized for 5 s, and hot water refluxed …

Go to article

Hydrothermal Fluids And Petroleum In Surface Sediments Of Guaymas Basin, Gulf Of California: A Case Study, J. M. Gieskes, B. R. Simoneit, T. Brown, Timothy J. Shaw, Y. C. Wang, A. Magenheim Jan 1988

Hydrothermal Fluids And Petroleum In Surface Sediments Of Guaymas Basin, Gulf Of California: A Case Study, J. M. Gieskes, B. R. Simoneit, T. Brown, Timothy J. Shaw, Y. C. Wang, A. Magenheim

Faculty Publications

No abstract provided.

Go to article

Feminist Jurisprudence: Grounding The Theories, Patricia A. Cain Jan 1988

Feminist Jurisprudence: Grounding The Theories, Patricia A. Cain

Faculty Publications

No abstract provided.

Go to article

Expert Discovery In The Eighth Circuit, An Empirical Study, David Day Jan 1988

Expert Discovery In The Eighth Circuit, An Empirical Study, David Day

Faculty Publications

No abstract provided.

Go to article

The Incidental Regulation Of Free Speech, David Day Jan 1988

The Incidental Regulation Of Free Speech, David Day

Faculty Publications

No abstract provided.

Go to article

Psychology Among The Saints: The Development Of Behavioral Science At Brigham Young University, Bruce L. Brown, Mark K. Allen Jan 1988

Psychology Among The Saints: The Development Of Behavioral Science At Brigham Young University, Bruce L. Brown, Mark K. Allen

Faculty Publications

There was a strong interest in psychology at Brigham Young University at the turn of the century; the third president was a psychologist and a number of distinguished psychologists regularly visited the campus. An outstanding young scholar who was destined to become the only Mormon president of the American Psychological Association started a vigorous academic psychology program in those early years, but he left the university because of a controversy over his teachings. Psychology at Brigham Young University developed little from that time until the 1940s. The 1950s were a time of rapid growth and development, expansion of the faculty, …

Go to article

Nonlocal Symmetries And Backlund Transformations For The Self-Dual Yang-Mills System, C. J. Papachristou, Kent B. Harrison Jan 1988

Nonlocal Symmetries And Backlund Transformations For The Self-Dual Yang-Mills System, C. J. Papachristou, Kent B. Harrison

Faculty Publications

The observation is made that generalized evolutionary isovectors of the self-dual Yang–Mills equation, obtained by "verticalization'' of the geometrical isovectors derived in a previous paper [J. Math. Phys. 28, 1261 (1987)], generate Bäcklund transformations for the self-dual system. In particular, new Bäcklund transformations are obtained by "verticalizing'' the generators of point transformations on the solution manifold. A geometric ansatz for the derivation of such (generally nonlocal) symmetries is proposed.

Go to article

Quasilinear Evolution Equations In Nonclassical Diffusion, Kenneth Kuttler, Elias Aifantis Jan 1988

Quasilinear Evolution Equations In Nonclassical Diffusion, Kenneth Kuttler, Elias Aifantis

Faculty Publications

After describing the motivation leading to some nonclassical diffusion equations, we formulate a general abstract nonlinear evolution equation and establish existence of solutions. Then we return to the original equation and discuss particular initial-boundary value problems.

Go to article

Digital Neural Networks, Tony R. Martinez Jan 1988

Digital Neural Networks, Tony R. Martinez

Faculty Publications

Demands for applications requiring massive parallelism in symbolic environments have given rebirth to research in models labeled as neural networks. These models are made up of many simple nodes which are highly interconnected such that computation takes place as data flows amongst the nodes of the network. To present, most models have proposed nodes based on simple analog functions, where inputs are multiplied by weights and summed, the total then optionally being transformed by an arbitrary function at the node. Learning in these systems is accomplished by adjusting the weights on the input lines. This paper discusses the use of …

Go to article

Comparison Of Effective Medium Procedures For Optical Modeling Of Laminar Structures, David D. Allred, Robert F. Edgerton Jan 1988

Comparison Of Effective Medium Procedures For Optical Modeling Of Laminar Structures, David D. Allred, Robert F. Edgerton

Faculty Publications

This study addresses the question, "How can the optical properties of matter in ultrathin amorphous nonmetallic films in multilayers best be determined from reflectance (R) and transmission (T) measurements?" A blue shift in the band gap of plasma CVD a-Si:H/a-SiNx:H multilayers was reported several years ago. It was suggested that the shift in the band gap, Eg, Relative to bulk a-Si:H as given by the Tauç plot was due to quantum confinement effects. The purpose of this study is to evaluate the usefulness of various effective media theories (EMT) for determining the optical constants of materials in a multilayer and …

Go to article

Aids And The Law, A Guide For The Public [Book Review], Margalynne J. Armstrong Jan 1988

Aids And The Law, A Guide For The Public [Book Review], Margalynne J. Armstrong

Faculty Publications

No abstract provided.

Go to article

Withdrawal Of Life Support: Individual Autonomy Against Alleged State Interests In Preserving Life, Michelle Oberman Jan 1988

Withdrawal Of Life Support: Individual Autonomy Against Alleged State Interests In Preserving Life, Michelle Oberman

Faculty Publications

No abstract provided.

Go to article

Interpolation Of Besov-Spaces, Ronald A. Devore, Vasil A. Popova Jan 1988

Interpolation Of Besov-Spaces, Ronald A. Devore, Vasil A. Popova

Faculty Publications

We investigate Besov spaces and their connection with dyadic spline approximation in Lp(Omega), 0 < p (less than or equal to) infinity. Our main results are: the determination of the interpolation spaces between a pair of Besov spaces; an atomic decomposition for functions in a Besov space; the characterization of the class of functions which have certain prescribed degree of approximation by dyadic splines.

Go to article

Involutions On Banach Spaces And Reflexivity, S J. Dilworth Jan 1988

Involutions On Banach Spaces And Reflexivity, S J. Dilworth

Faculty Publications

No abstract provided.

Go to article

The Twentieth Fermat Number Is Composite, Jeff Young, Duncan A. Buell Jan 1988

The Twentieth Fermat Number Is Composite, Jeff Young, Duncan A. Buell

Faculty Publications

The twentieth Fermat number, F20 = 22^20 +1, has been proven composite by machine computation.

Go to article

Electrochemical Production And Corrosion Testing Of Amorphous Ni-P, Jose L. Carbajal, Ralph E. White Jan 1988

Electrochemical Production And Corrosion Testing Of Amorphous Ni-P, Jose L. Carbajal, Ralph E. White

Faculty Publications

Ni-P alloys were prepared by electrodeposition under different conditions on a rotating disk electrode. A variety of alloys were prepared ranging from Ni-15P to Ni-25P. An indirect reduction of species in solution involving several steps appears to be favored over the direct reduction at the electrode based on the low P content in the alloy. Energy dispersion x-ray microanalysis was used to determine composition of the alloy. Transmission electron microscopy and x-ray diffraction corroborated the amorphous nature of the structure. The physical and chemical homogeneity of the metallic glasses produced electrochemically is substantiated by the absence of electrochemical localized attack. …

Go to article

Oxygen Reduction On Silver In 6.5 Molar Caustic Soda Solution, Prosper K. Adanuvor, Ralph E. White Jan 1988

Oxygen Reduction On Silver In 6.5 Molar Caustic Soda Solution, Prosper K. Adanuvor, Ralph E. White

Faculty Publications

No abstract provided.

Go to article

A Two-Dimensional Mathematical Model Of A Porous Lead Dioxide Electrode In A Lead-Acid Cell, E. C. Dimpault-Darcy, T. V. Nguyen, Ralph E. White Jan 1988

A Two-Dimensional Mathematical Model Of A Porous Lead Dioxide Electrode In A Lead-Acid Cell, E. C. Dimpault-Darcy, T. V. Nguyen, Ralph E. White

Faculty Publications

A two-dimensional mathematical model is presented for a lead dioxide electrode in a lead-acid cell. It is used to simulate the time dependent behavior of the electrode during discharge. The model contains six dependent variables: the concentration of the acid electrolyte, the porosity, the electrical potentials of the solid and solution phases, and the two directional components of the current density in the electrolyte. The effect of the electrode grid was included by varying the conductivity of the solid. Parameters such as electrode conductivity, electrode dimensions, and temperature are investigated to understand their effects on electrode discharge performance.

Go to article

Analysis Of Electrokinetic Data By Parameter Estimation And Model Discrimination Techniques, Prosper K. Adanuvor, Ralph E. White Jan 1988

Analysis Of Electrokinetic Data By Parameter Estimation And Model Discrimination Techniques, Prosper K. Adanuvor, Ralph E. White

Faculty Publications

An alternative approach to classical methods of electrochemical data analysis is presented. This alternative method is based on nonlinear parameter estimation and model discrimination techniques. The method is used to obtain the relevant kinetic and transport parameters and to elucidate the kinetic mechanism of O2 reduction at carbon and silver electrodes in alkaline electrolytes.

Go to article

Oxygen Reduction On Silver In 6.5m Caustic Soda Solution, Prosper K. Adanuvor, Ralph E. White Jan 1988

Oxygen Reduction On Silver In 6.5m Caustic Soda Solution, Prosper K. Adanuvor, Ralph E. White

Faculty Publications

The cathodic reduction of oxygen in 6.5M membrane-grade caustic soda solution has been studied experimentally at a silver rotating disk electrode at 25°C. The results can be approximated by the parallel mechanism for oxygen reduction with catalytic decomposition of peroxide. Further analysis of this mechanism indicates that the sequential process with catalytic decomposition of peroxide predominates over the direct 4e– process. Direct application of the sequential mechanism to the data indicates that the latter mechanism with catalytic decomposition of peroxide much more accurately reflects the experimental results. The relevant kinetic parameters are calculated on the basis of …

Go to article

A Mathematical Model For The Electrodeposition Of Alloys On A Rotating Disk Electrode, Shiuan Chen, Ken-Ming Yin, Ralph E. White Jan 1988

A Mathematical Model For The Electrodeposition Of Alloys On A Rotating Disk Electrode, Shiuan Chen, Ken-Ming Yin, Ralph E. White

Faculty Publications

A general multiple electrode reaction model for electrodeposition of alloys on a rotating disk electrode is presented. Included in the model are mass transport equations with the effect of ionic migration, Butler-Volmer kinetic rate expressions, and the mole fractions of the individual components in the solid state. The model shows that the effect of ionic migration is important and that plating variables such as applied potential, pH, and bulk concentration can be included. Two examples (Ni-P and Ru-Ni-P) are used to illustrate the predictions of the model.

Go to article

Electrodeposition Of Copper-Nickel Alloys From Citrate Solutions On A Rotating Disk Electrode, Ramona Y. Ying, Patrick K. Ng, Z. Mao, Ralph E. White Jan 1988

Electrodeposition Of Copper-Nickel Alloys From Citrate Solutions On A Rotating Disk Electrode, Ramona Y. Ying, Patrick K. Ng, Z. Mao, Ralph E. White

Faculty Publications

A mathematical model is developed to simulate the electrodeposition of Cu-Ni alloy from citrate solutions onto a rotating disk electrode under potentiostatic control. The model includes the influence of diffusion, ionic migration, forced convection, and homogeneous equilibria. The three major electrochemical reactions treated in the model are copper deposition, nickel deposition, and hydrogen evolution. Using experimental parameters when available, the model was fitted and tested against experimentally-obtained results for different bath compositions and operating conditions. The model agreed reasonably well with the experimental results particularly in the codeposition region, –1.0 to –1.2V vs. SCE, where hydrogen evolution is not the …

Go to article

Gender Justice And Its Critics, Neal Devins Jan 1988

Gender Justice And Its Critics, Neal Devins

Faculty Publications

No abstract provided.

Go to article

The Constitution Between Friends, Neal Devins Jan 1988

The Constitution Between Friends, Neal Devins

Faculty Publications

No abstract provided.

Go to article

Quantum Electrodynamics Based On Self-Fields, Without Second Quantization: A Nonrelativisitc Calculation Of G – 2, A. O. Barut, Jonathan P. Dowling, Jean F. Van Huele Jan 1988

Quantum Electrodynamics Based On Self-Fields, Without Second Quantization: A Nonrelativisitc Calculation Of G – 2, A. O. Barut, Jonathan P. Dowling, Jean F. Van Huele

Faculty Publications

Using a formulation of quantum electrodynamics that is not second quantized, but rather based on self-fields, we compute the anomalous magnetic moment of the electron to first order in the fine structure constant α. In the nonrelativistic (NR) case and in the dipole approximation, our result is ae≡(g—2)/2=(4Λ/3m)(α/2π), where Λ is a positive photon energy cutoff and m the electron mass. A reasonable choice of cutoff, Λ/m=¾, yields the correct sign and magnitude for g—2 namely, ae=+α/2π. . In our formulation the sign of a3 is correctly positive, …

Go to article

First Prev Next Last