Digital Commons Network^™

Parallel Plate Electrochemical Reactor Model, Ralph E. White, Mike Bain, Mike Raible

Faculty Publications

No abstract provided.

Prediction Of The Current Density At An Electrode At Which Multiple Electrode Reactions Occur Under Potentiostatic Control, Ralph E. White, S. E. Lorimer, R. Darby

Faculty Publications

It is often desirable to be able to predict the total current density at an electrode when multiple electrochemical reactions occur there under potentiostatic control. It is also sometimes desirable to include the effect of ionic migration within the diffusion layer upon the predicted total (1) and partial current densities (2). A procedure for doing this can be illustrated by considering the rotating disk electrode (RDE) system and the associated potential distribution near the RDE as shown in Fig. 1 and 2.

An Analysis Of A Back Fed Porous Electrode For The Br2/Br Reaction, John Van Zee, Ralph E. White

Faculty Publications

An experimental analysis of the Br₂/Br^– redox reaction in a porous back fed ruthenium-coated titanium electrode is described. A mathematical model of the steady-state process is presented. Nonlinear regression of the model against the experimental data gives physically meaningful parameter estimates; these parameters and the model provide a design equation for the porous electrode current as a function of specific surface area, bulk Br₂ concentration, average total overpotential, and the Reynolds number. The design equation shows that the back fed electrode could reduce the loss of Br₂ across the separator and the ohmic loss in …

The Pronunciation Of Women: Some Spanish Evidence, Lynn Williams

Faculty Publications

The material for this article bas been drawn from a larger sociolinguistic survey of various aspects of tbe phonology of 18-26 yr olds in Valladolid carried out between October 1976 and April 1977. The methodology used is basically the same as that developed by William Labov for his New York survey and has become one of the most established methods of enquiry into the social differentiation of the phonology of urban speech-communities. Informants were selected from the Valladolid census records in a semi-random manner and assigned to their socio-economic class according to the criteria of Spanish sociologists. Each informant was …

Computing As A Part Of A P.H.D Students Education: A Position Paper, Andrew D. Bailey, Rayman D. Meservy

Faculty Publications

The skills and abilities associated with computer literacy are becoming required tools for accounting Ph.D. students. Not only are new doctoral students entering Ph.D. programs with better skills, they are also applying these skills more on a day to day basis. This paper presents a brief discussion of a number of issues associated with computer use and computer literacy in general. The paper also presents several aspects of the Ph.D. program at the University of Minnesota and how computers are affecting the program.

Tax Exemptions For Racially Discriminatory Private Schools: A Legislative Proposal, Neal Devins

Faculty Publications

In Revenue Ruling 71-447, the Internal Revenue Service expressly denied tax exemptions to racially discriminatory private schools. The Reagan administration recently challenged the existence of a defined policy prohibiting tax exemptions to these schools as well as the propriety of the IRS's involvement in regulating social policy. President Reagan has called upon Congress to settle the issue by enacting affirmative legislation. Congress, however, has maintained that long-established federal policy supports Revenue Ruling 71-447 and has refused to enact affirmative legislation. In this Article, Mr. Devins examines the conflict between the executive, judicial, and legislative branches of government and argues that …

Book Review Of Genetics, Ethics, And The Law, Larry I. Palmer

Faculty Publications

No abstract provided.

Modal Control Of An Unstable Periodic Orbit, William Wiesel, William Shelton

Faculty Publications

We apply Floquet theory to the problem of designing a control system for a satellite in an unstable periodic orbit. Expansion about a periodic orbit produces a time periodic linear system, which is augmented by a time periodic control term. We show that this can be done such that a) the application of control produces only inertial accelerations, b) positive real Poincare exponents are shifted into the left half-plane, and c) the shift of the exponent is linear with control gain. We apply these developments to an unstable orbit near the Earth-Moon L₃ point perturbed by the Sun. Finally, …

Transborder Data Flow: An Overview And Critique Of Recent Concerns, I. Trotter Hardy

Faculty Publications

No abstract provided.

Bovine Adrenocortical Microsomal Hemeproteins P-45017 Alpha And P-450c-21. Isolation, Partial Characterization, And Comparison To P-450scc., J. Bumpus, K. M. Dus

Faculty Publications

A scheme is presented for the simultaneous isolation of P-45017n, and P-450c-21 from bovine adrenocortical microsomes and for their purification to specific contents of 19-20 nmol of P-450/mg of protein. Although cholate solubilized only 75% of the total amount of P- 450 and 36% of the NADPH-cytochrome C (P-450) reductase present in bovine adrenocortical microsomes as compared to Triton N-101, it produced a less complex mixture of microsomal proteins from which most of the P-450 could be removed by a 0-25% cut with polyethylene glycol. The P-450 fraction was subsequently resolved into individual P-450s by column chromatography on w-aminooctyl-Sepharose; these …

The Greek Military Regime (1967-1974) And The Cyprus Question — Origins And Goals, Constantine P. Danopoulos

Faculty Publications

This article employs the concept of military professionalism and its attributes to explain the Greek praetorian regime's handling of the Cyrprus problem. Upon examining the relevant data it was found that for strategic considerations the U.S. and NATO sought to achieve a negotiated solution to the cyprus problem which would have amounted to double Enosis. It was also found that professional needs created a dependency of the Greek. military on NA TO for arms, sophisticated training, and support which let them view participation in NATO as indespensable. As a result, the Greek military confused the interests of their nation with …

The Dimensions Of Seizure: The Concepts Of "Stop" And "Arrest", Richard A. Williamson

Faculty Publications

No abstract provided.

The Diffusion Thermoeffect In Ternary, Nonelectrolyte Liquid Mixtures, Richard L. Rowley, Gerald Platt, Tevin Vongvanich

Faculty Publications

Expressions for that portion of the heat flux which is due to composition gradients in multicomponent nonelectrolyte liquid mixtures have been formulated in terms of heats of transport. The resultant thermal energy equation in combination with component mass balance equations constitute coupled partial differential equations descriptive of the diffusion thermoeffect in liquid mixtures. These equations were solved with a double perturbation technique subject to initial and boundary conditions consistent with experimental design conditions considered appropriate for successful measurement of multicomponent heats of transport. Based on the adiabatic type cell, the expected temperature response, dependent on cell variables, experimental conditions, and …

Diffusion Thermoeffect Measurements Of Heats Of Transport In Ternary Liquid Toluene Chlorobenzene Bromobenzene Mixtures At 25°C And 3°C, Richard L. Rowley, Gerald Platt, Tevin Vongvanich

Faculty Publications

Heats of transport in ternary nonelectrolyte liquid mixtures have been directly measured for the first time. Diffusion thermoeffect measurements have been made for ternary mixtures of toluene-chlorobenzene-bromobenzene at 25 degrees and 35 degrees C. A new boundary sharpening technique was used in addition to a liquid gate withdrawal method. Both techniques yield consistent, accurate values of the heat of transport, but the new cell provides versatility in allowable densities and compositions of the initial phases. Heats of transport were obtained by nonlinear least-squares fitting of calculated to experimental temperature differences measured at positions symmetric about the initial diffusional interface. The …

Report To The Copyright Office By The American Association Of Law Libraries, James S. Heller

Faculty Publications

No abstract provided.

Economic Implications Of The Policy For Pricing And Allocating Rice In Egypt, Sonia Mohamed Ali, B. Gardner Delworth

Faculty Publications

Rice is both heavily subsidized and rationed in Egypt. This policy has significant distributive effects and especially benefits low income consumers in both urban and rural areas of the country. In addition, the policy has important allocative effects in shifting scarce resources to inefficient uses. This paper attempts to measure the economic inefficiency associated with this policy in order that the policy makers may judge better whether or not the distributive benefits are worth the efficiency costs.

Book Review Of The Model Penal Code And Commentaries, Paul Marcus

Faculty Publications

No abstract provided.

Stand Risk Rating For The Southern Pine Beetle: Integrating Pest Management With Forest Management, Gordon L. Autry

Faculty Publications

Stand risk rating for the southern pine beetle.

Dendroctonus frontalis Zimm., is a first step toward dealing with a serious but sporadic insect problem. Two approaches, one utilizing readily available resource data, the other employing data obtained from aerial photographs, illustrate application of current knowledge to meet the protection needs of resource management-the primary role of integrated pest management. During a 36-month period in Louisiana, high-risk stands accounted for 13.4 infestations per 1,000 acres, four times the rate of low-risk stands; in Texas high-risk stands accounted for 9 .9 infestations per 1 ,000 acres during 1973-1978, almost five times the …

High-Temperature Battery Calorimeter, L. D. Hansen, R. H. Hart, D. M. Chen, H. F. Gibbard

Faculty Publications

A battery calorimeter was built for the measurement of thermal energy generation of high-temperature lithium–aluminum/iron sulfide battery cells, which are under development for electric vehicle propulsion and other energy storage applications. The calorimeter was designed with a temperature range of 400˚–500˚C, a detection limit of 1 mW, and an upper limit of heat flow of 50 W. The results of measurements on 200-Ah LiAl/FeS cells were in excellent agreement with the predictions of thermodynamic calculations based on precise measurements of the total cell polarization and the temperature coefficient of the emf. Details of the construction and operation principles of this …

The Media In The Courtroom: Attending, Reporting, Televising Criminal Cases, Paul Marcus

Faculty Publications

No abstract provided.

Campaign Contributions And Congressional Voting: A Simultaneous Probit-Tobit Model, Henry W. Chappell Jr.

Faculty Publications

Full-information maximum likelihood (FIML) estimates of the simultaneous probit-Tobit (SPT) model suggest that effects of campaign contributions on voting are smaller than single equation probit estimates would indicate. The author has generally unable to conclude that contributions have a significant impact on voting decisions, apparently votes are most often decided on the basis of personal ideology or preferences of constituents. These findings differ markedly from earlier results of economists Gary C. Durden and Jonathan J. Silberman, whose single equation models showed a substantial impact of contributions on voting decisions. Despite the lack of significance according to model SPT, it would …

A Hidden-Line Algorithm For Hyperspace, Robert P. Burton, David R. Smith

Faculty Publications

An object-space hidden-line algorithm for higher-dimensional scenes has been designed and implemented. Scenes consist of convex hulls of any dimension, each of which is compared against the edges of all convex hulls not eliminated by a hyperdimensional clipper, a depth test after sorting and a minimax text. Hidden and visible elements are determined in accordance with the dimensionality of the selected viewing hyperspace. When shape alone is the attribute of interest, hidden-line elimination need be performed only in that hyperspace. The algorithm is of value in the production of shadows of hyperdimensional models, including but not limited to four-dimensional space-time …

Physical Science Workshop Course For Elementary Teachers, Glen T. Clayton, Harry D. Downing, Thomas O. Callaway

Faculty Publications

Science for elementary school grades K-6 varies somewhat in content from one textbook series to another, but it is fairly common that 40-60% of the material covered is directly related to physics. These texts suggest that certain learning activities such as experiments, demonstrations, and observations be carried out by the teacher and the class. Often the apparatus for a learning activity is to be constructed from simple, readily available materials. The typical elementary school teacher has had little experience in performing experiments and is often frustrated in his/her attempts at carrying out the suggested learning activity. To meet this need …

Source Control And Evaluation Of Newspaper Inaccuracies, William A. Tillinghast

Faculty Publications

No abstract provided.

Problems In Assessing Punitive Damages Against Manufacturers Of Defective Products, David Owen

Faculty Publications

No abstract provided.

An Introductory Analysis Of Energy Law And Policy, Kenneth A. Manaster

Faculty Publications

No abstract provided.

The Effect Of N-Methylprotoporphyrin Ix On The Synthesis Of Photosynthetic Pigments In Cyanidium Caldarium. Further Evidence For The Role Of Haem In The Biosynthesis Of Plant Billins., S. B. Brown, J. A. Holroyd, D. I. Vernon, R. F. Troxler, K. M. Smith

Faculty Publications

No abstract provided.

The Use Of N-Methylprotoporphyrin Dimethyl Ester To Inhibit Ferrochelatase In Rhodopseudomonas Sphaeroides And Its Effect In Promoting Biosynthesis Of Magnesium Tetrapyrroles, J. D. Houghton, C. L. Honeybourne, K. M. Smith, H. D. Tabba, O. T. Jones

Faculty Publications

No abstract provided.

Smoking In The Soviet Union, R. Cooper

Faculty Publications

Although it is the fourth largest producer of tobacco in the world, relatively little has been written about the problem in the USSR. Since the economy is centrally planned and marketing of tobacco products is under direct government control it might be expected that the Soviet Union would implement different, perhaps, more effective, antismoking campaigns. Unfortunately, this has not been the case.

Recent Trends In Coronary Risk Factors In The Ussr, R. Cooper, A. Schatzkin

Faculty Publications

The Soviet Union has experienced an increase in the incidence of coronary heart disease over the last 15 years sufficient to result in an overall deterioration in the health of adults. The distribution of coronary risk factors, and the secular trends in diet and cigarette consumption provide a potential explanation for the upsurge in death rates. The animal fat content of the Soviet diet has been steadily enriched since the 1950s and cigarette production increased 72 per cent from 1959 to 1980. The post-Stalin orientation of the Soviet economy toward a policy of motivating the work force primarily through the …