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A Multiphase Mathematical Model Of A Nickel/Hydrogen Cell, Pauline De Vidts Jan 1996

A Multiphase Mathematical Model Of A Nickel/Hydrogen Cell, Pauline De Vidts

Faculty Publications

No abstract provided.

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Galvanostatic Pulse And Pulse Reverse Plating Of Zinc-Nickel Alloys From Sulfate Electrolytes On A Rotating Disc Electrode, Branko N Popov, M. Ramasubramanian, S. N. Popova, Ralph E. White, K-M. Yin Jan 1996

Galvanostatic Pulse And Pulse Reverse Plating Of Zinc-Nickel Alloys From Sulfate Electrolytes On A Rotating Disc Electrode, Branko N Popov, M. Ramasubramanian, S. N. Popova, Ralph E. White, K-M. Yin

Faculty Publications

Galvanostatic pulse and pulse reverse techniques have been used to study the plating of zinc–nickel alloys in the presence of nonyl phenyl polyethylene oxide. The effects of average current density, rotation speed of disc electrode and the presence of nonyl phenyl polyethylene oxide in the electrolyte on deposition of zinc–nickel alloys were evaluated. Zinc–nickel plating bath solution chemistry was studied by determining the equilibrium concentrations at various pH levels. It was found that the alloy composition was determined by solution equilibria, mass transfer of the electroactive species within the diffusion layer and by the surface coverage of nonyl phenyl polyethylene …

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A Model For The Galvanostatic Deposition Of Nickel Hydroxide, Mahesh Murthy, Gowri S. Nagarajan, John W. Weidner, John W. Van Zee Jan 1996

A Model For The Galvanostatic Deposition Of Nickel Hydroxide, Mahesh Murthy, Gowri S. Nagarajan, John W. Weidner, John W. Van Zee

Faculty Publications

A mathematical model is presented for the galvanostatic deposition of Ni(OH)2 films in stagnant Ni(NO3)2 solutions. The objective is to quantify the anomalous deposition behavior reported previously in which the utilization of the electrochemically generated OH– species decreased drastically as the concentration of Ni(NO3)2 increased beyond 0.1 M. For example as the Ni(NO3)2 concentration increased from 0.1 to 2.0 M, the deposition rate decreased by a factor of ten at 2.5 mA/cm2. At this high ratio of concentration to current density, a comparison with Faraday's …

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Analysis Of Transient Hydrogen Uptake By Metal Alloy Particles, Wenlin Zhang, Supramaniam Srinivasan, Harry J. Ploehn Jan 1996

Analysis Of Transient Hydrogen Uptake By Metal Alloy Particles, Wenlin Zhang, Supramaniam Srinivasan, Harry J. Ploehn

Faculty Publications

This paper describes a new approach to solving the equations comprising the shrinking core model for diffusion and reaction of a chemical species in a solid spherical particle. The reactant adsorbs on the particle surface, diffuses into the particle's interior, and reacts with the particle to form a solid product. The shrinking core model assumes a fast reaction rate compared to reactant diffusion so that the reaction is localized in the interfacial zone between the unreacted solid core and the surrounding shell of reacted product. Analytical solutions of the governing conservation equations usually invoke the pseudo-steady state (PSS) approximation which …

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Empirical Findings On The Aces Decision-Making Technique, Larry E. Pate, Troy R. Nielson Jan 1996

Empirical Findings On The Aces Decision-Making Technique, Larry E. Pate, Troy R. Nielson

Faculty Publications

Over the past two years, we have conducted a series of empirical studies on the ACES Decision-making Technique, a normative procedure (Pate, 1987) based upon the Janis and Mann (1977) assertion that decision makers who fail to engage in sufficient information search often find themselves in defensive avoidance and are, thus, unable to be vigilant, resulting in problems of procrastination, shifting responsibility, and rationalization of decisions. ACES represents a mechanism for achieving greater information search through a structured process that involves (1) identifying and challenging Assumptions, (2) clarifying and establishing more accurate Criteria weights, (3) expanding the Evoked set of …

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The Children We Abandon: Religious Exemptions To Child Welfare And Education Law As Denials Of Equal Protection To Children Of Religious Objectors, James G. Dwyer Jan 1996

The Children We Abandon: Religious Exemptions To Child Welfare And Education Law As Denials Of Equal Protection To Children Of Religious Objectors, James G. Dwyer

Faculty Publications

The story of children who die because their parents, in observance of their own religious principles, withhold conventional medical treatment from them is a familiar one. In this Article, James G. Dwyer shows that the phenomenon of parents denying secular benefits to their children for religious reasons goes far beyond these few highly publicized cases, extending into the realm of education as well as medical care. Moreover, Dr. Dwyer shows that the federal and state governments endorse this practice by statutorily exempting 'religious objector' parents from otherwise generally applicable compulsory child care and education laws. He argues that courts addressing …

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God Bless The Child: Poor Children, Parens Patriae, And A State Obligation To Provide Assistance, Kay P. Kindred Jan 1996

God Bless The Child: Poor Children, Parens Patriae, And A State Obligation To Provide Assistance, Kay P. Kindred

Faculty Publications

No abstract provided.

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Review Of Hibbitts' Last Writes?, I. Trotter Hardy Jan 1996

Review Of Hibbitts' Last Writes?, I. Trotter Hardy

Faculty Publications

No abstract provided.

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Understanding Communication In Second Language Classrooms, B Kumaravadivelu Jan 1996

Understanding Communication In Second Language Classrooms, B Kumaravadivelu

Faculty Publications

No abstract provided.

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Model Equations From Gyrokinetic Theory For A Non-Neutral Plasma To Include Temperature Effects And Applications To A Plasma Of Infinite Length, S. Neil Rasband Jan 1996

Model Equations From Gyrokinetic Theory For A Non-Neutral Plasma To Include Temperature Effects And Applications To A Plasma Of Infinite Length, S. Neil Rasband

Faculty Publications

Gyrokinetic equations are derived for applications to non-neutral plasmas in constant, straight magnetic fields wherein E X B drift velocities are of the same order as thermal velocities. The ratio of the E X B rotation frequency to the cyclotron frequency and the ratio of the gyroradius to a plasma scale length are assumed to be of order epsilon and terms are retained in the gyrokinetic expansion to second order to include finite-Larmor-radius (FLR) effects. A mode equation is obtained for a non-neutral plasma in the infinite-length approximation. The singularities of this equation are compared and contrasted with the familiar …

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Development Of A Method For Studying Thematic Content Of Psychotherapy Sessions, P. Scott Richards, Susan D. Lonborg Jan 1996

Development Of A Method For Studying Thematic Content Of Psychotherapy Sessions, P. Scott Richards, Susan D. Lonborg

Faculty Publications

The authors developed a measure for categorizing the nature of the topic that clients and therapists discuss from moment to moment during psychotherapy. The Counseling Topic Classification System (CTCS) contains 55 topics and 8 emotional categories. It was used to code the thematic content of Donald Meichenbaum's and Hans Strupp's initial therapy sessions with a client named Richard. Our findings provided preliminary evidence that the CTCS is useful for coding the core topic of initial therapy sessions and that thematic content may be an important process and contextual vari- able. Methods are described for studying thematic content as a contextual …

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Chemical Structure Of Coal Tar During Devolatilization, Thomas H. Fletcher, Mathew Watt Jan 1996

Chemical Structure Of Coal Tar During Devolatilization, Thomas H. Fletcher, Mathew Watt

Faculty Publications

Three coals of different rank were pyrolyzed in a drop-tube reactor at a maximum temperature of 900 K and a residence time of 160 ms. The coal and char were analyzed with solid-state 13C NMR. The tar was dissolved in deuterated methylene chloride. It was found that the tar was only partially soluble in CD2Cl2. The nonsoluble tar portion was analyzed in the same manner as the coal and char, while the soluble tar portion was analyzed using a recently developed high-resolution 13CNMRtechnique developed for liquid phases. The tar structure was found to be significantly …

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A Computational Method For Determining Global Fuel-No Rate Expressions. Part 1, Wei Chen, L Douglas Smoot, Thomas H. Fletcher, Richard D. Boardman Jan 1996

A Computational Method For Determining Global Fuel-No Rate Expressions. Part 1, Wei Chen, L Douglas Smoot, Thomas H. Fletcher, Richard D. Boardman

Faculty Publications

Global chemical reaction rates used in the modeling of NOx formation in comprehensive combustion codes have traditionally been obtained through correlation of experimental data. In this paper, a computational approach for obtaining global rates is presented. Several premixed flames were simulated, and sensitivity analysis of species concentration profiles was used to suggest global pathways in fuel-nitrogen conversion to NO. Based on these analyses, the global reaction rates were formulated. The predicted species concentration profiles and their derivatives were then used in the determination of the global rate constants. The correlation of rate constants for the two fuel-NO global rates …

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Branching Fractions And Oscillator Strengths For Fe Ii Transitions From The 3d6(5D)4p Subconfiguration, Scott D. Bergeson, K. L. Mullman, M. E. Wickliffe, J. E. Lawler Jan 1996

Branching Fractions And Oscillator Strengths For Fe Ii Transitions From The 3d6(5D)4p Subconfiguration, Scott D. Bergeson, K. L. Mullman, M. E. Wickliffe, J. E. Lawler

Faculty Publications

New experimental branching fractions and transition probabilities are reported for 56 transitions in Fe II. The branching fractions are measured with a Fourier transform spectrometer and also with a high-resolution grating spectrometer on a n optically thin hollow cathode discharge. Highly accurate experimental radiative lifetimes from the recent literature provide the normalization required to convert our branching fractions into absolute transition probabilities. Results are compared with experimental and theoretical values in the literature. Our new transition probabilities will establish the absolute scale for relative absorption oscillator strengths of vacuum ultraviolet lines measured using a new high-sensitivity absorption experiment at the …

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The Book Of Numbers At Qumran: Texts And Context, Dana M. Pike Jan 1996

The Book Of Numbers At Qumran: Texts And Context, Dana M. Pike

Faculty Publications

In this paper I examine the significance of the book of Numbers for the covenant community at Qumran. By way of background, I will relate the reason I chose this topic. My assignment as an editor of fragments for DJD is to prepare about sixty plates of miscellaneous and mainly unidentified fragments from Cave 4 at Qumran for publication. While some of these fragments have been identified and have been or will be published by others, I have well over 1,000 fragments with which to work. Most are quite small. Andrew Skinner, a colleague of mine at Brigham Young University, …

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The ‘Congregation Of Yhwh’ In The Bible And At Qumran, Dana M. Pike Jan 1996

The ‘Congregation Of Yhwh’ In The Bible And At Qumran, Dana M. Pike

Faculty Publications

THIS study presents the preliminary publication of a small but interesting fragment from Cave 4 at Qumran, commentary on which is followed by a d iscussion of the phrase "congregation of YHWJ-1," which is found on the fragment and in the Bible.

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High-Sensitivity Absorption Spectroscopy In Fe Ii, Scott D. Bergeson, K. L. Mullman, J. E. Lawler Jan 1996

High-Sensitivity Absorption Spectroscopy In Fe Ii, Scott D. Bergeson, K. L. Mullman, J. E. Lawler

Faculty Publications

We report the first measurements of UV oscillator strengths (ƒ-values) in Fe II from a high-sensitivity absorption experiment developed at the University of Wisconsin. The accuracy of our measurements is demonstrated by our reproducing well-known ƒ-value ratios in Fe I and Fe II. The first laboratory ƒ-value measurement of the 160.845 nm transition in Fe II is presented and compared to values in the literature. While this paper focuses on Fe II, the high-sensitivity absorption method that we have developed is applicable to essentially every element in the periodic table, for both neutral and ionized species, over a broad range …

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The True Points Of My Doctrine, Noel B. Reynolds Jan 1996

The True Points Of My Doctrine, Noel B. Reynolds

Faculty Publications

In a 1991 BYU Studies article, I identified and analyzed three core Book of Mormon passages in which the gospel or doctrine of Jesus Christ is defined. Each of these passages presents the gospel as a six-point formula or message about what men must do if they will be saved. In the present article I go on to examine all other Book of Mormon references to the six elements in this formula. Faith is choosing to trust in Jesus Christ in all that one does. Repentance is turning away from the life of sin by making a covenant to obey …

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On The Cross-Cultural Attitudes And Experiences Of Recently Returned Lds Missionaries, Timothy B. Smith, Richard N. Roberts, Burton Kerr Jan 1996

On The Cross-Cultural Attitudes And Experiences Of Recently Returned Lds Missionaries, Timothy B. Smith, Richard N. Roberts, Burton Kerr

Faculty Publications

To examine the effect of the mission experience upon attitudes towards members of different cultures, 273 recently returned LDS missionaries and 493 LDS college students who had not yet served missions were administered measures of racial attitudes. Subsequently, the highest and lowest fifth of missionaries who had served in non-English speaking nations were interviewed. Results indicated that the missionaries did differ from the non-missionary sample in their racial attitudes and that several key qualitative pre-mission and mission experiences distinguished between the two groups interviewed. Prejudice, with its attendant train of evil, is giving way before the force of truth, whose …

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A Note On Internet Resources For The Entrepreneur: A Small Firm Finance Perspective, James C. Brau Jan 1996

A Note On Internet Resources For The Entrepreneur: A Small Firm Finance Perspective, James C. Brau

Faculty Publications

This article concentrates on internet resources that are available to those interested in entrepreneurial and small firm finance. Specifically, I present web pages that focus on general entrepreneurial issues and different avenues for acquiring capital. The three main areas of external financing that I include are venture capital, going public, and loans. Additionally, the advantages of using electronic mail, distribution lists, and personal web page applications are discussed and several examples presented.

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Conversion Of Coal Tar To Soot During Coal Pyrolysis In A Post-Flame Environment, Thomas H. Fletcher, Jinliang Ma, Brent W. Webb Jan 1996

Conversion Of Coal Tar To Soot During Coal Pyrolysis In A Post-Flame Environment, Thomas H. Fletcher, Jinliang Ma, Brent W. Webb

Faculty Publications

Coal pyrolysis experiments were performed in the postflame region of a CH4/H2/air flat-flame burner operating under fuel-rich conditions, where the temperature and gas compositions were similar to those in the near-burner region of a large-scale coal-fired furnace. Volatiles released from the coal particles formed a cloud of soot particles at high temperatures in the absence of oxygen. The soot particles in the cloud were collected at different residence times using a water-cooled, nitrogen-quenched suction probe. Test variables included the reaction temperature and coal type. Soot yields in terms of weight percentage of dry ash-free coal were measured based on bulk …

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Methazolamide For Essential Voice Tremor, Christopher Dromey, Karen Busenbark, L Ramig, William C. Koller Jan 1996

Methazolamide For Essential Voice Tremor, Christopher Dromey, Karen Busenbark, L Ramig, William C. Koller

Faculty Publications

We studied the safety and efficacy of methazolamide (average dose 168 mg/day) in a placebo-controlled blinded investigation in nine patients with essential voice tremor. There were no significant differences for physician or patient clinical rating scores. Digital audio tape recordings showed no difference for amplitude modulation, but frequency modulation was significantly altered by methazolamide. Side effects were common with the drug. We conclude that methazolamide has limited usefulness in the treatment of essential voice tremor.

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The Parkinson Larynx: Tremor And Videostroboscopic Findings, Christopher Dromey, Kathe S. Perez, Lorraine Olson Ramig, Marshall E. Smith Jan 1996

The Parkinson Larynx: Tremor And Videostroboscopic Findings, Christopher Dromey, Kathe S. Perez, Lorraine Olson Ramig, Marshall E. Smith

Faculty Publications

Summary: Patients with Parkinson's disease have a high incidence of speech, voice, and laryngeal abnormalities. To characterize laryngeal abnormalities, visual-perceptual ratings of endoscopic and stroboscopic examinations of 22 patients diagnosed with idiopathic Parkinson's disease and 7 patients with Parkinson's-plus syndromes were carried out by four trained viewers. Incidence of tremor, tremor location, phase closure, phase symmetry, amplitude, and mucosal waveform were scored. Tremor was observed in one or more of these conditions--rest, normal pitch and loudness, or loud phonation--for most of the 29 patients. Fifty-five percent of the idiopathic Parkinson's disease patients had tremor, with the primary location being vertical …

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Aerodynamic Mechanisms Underlying Treatment-Related Changes In Vocal Intensity In Patients With Parkinson Disease, Christopher Dromey, Lorraine Olson Ramig Jan 1996

Aerodynamic Mechanisms Underlying Treatment-Related Changes In Vocal Intensity In Patients With Parkinson Disease, Christopher Dromey, Lorraine Olson Ramig

Faculty Publications

The purpose of this study was to document changes in aerodynamic and glottographic aspects of vocal function in patients with Parkinson disease who received two forms of high effort treatment. Previous reports (Ramig, Countryman, Thompson, & Horii, 1995) have documented increased sound pressure level (SPL) following treatment that trained phonation and respiration (Lee Silverman Voice Treatment: LSVT), but not for treatment that trained respiration only (R). In order to examine the mechanisms underlying these differences, measures of maximum flow declination rate (MFDR) and estimated subglottal pressure (Psub)were made before and after treatment. A measure of relative vocal fold adduction (EGGW) …

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Diphthongization In Spanish Derivational Morphology: An Empirical Investigation, David Eddington Jan 1996

Diphthongization In Spanish Derivational Morphology: An Empirical Investigation, David Eddington

Faculty Publications

The alternation between the mid-vowels / e/, /o/ and the diphthongs /je/ and /we/ is widespread in Spanish, and several rule-based analyses claim to account for it. However, they are founded on a small body of evidence. These analyses are evaluated against data from a large corpus, and cannot account for the non-discrete nature of diphthongization as evidenced in the corpus. The corpus data suggest that diphthongization has a gradient relationship to the derivational suffixes. · A nonderivational account, based on Bybee's model (1985, 1988, 1991), better embodies the scalar relationship between diphthongization and the suffixes. This relationship was tested …

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Health Insurance And Early Retirement: Evidence From The Availability Of Continuation Coverage, Jonathan Gruber, Brigitte C. Madrian Jan 1996

Health Insurance And Early Retirement: Evidence From The Availability Of Continuation Coverage, Jonathan Gruber, Brigitte C. Madrian

Faculty Publications

The dramatic postwar decline in the labor force participation of older men in the United States has motivated a sizable body of literature on retirement behavior. Three factors, in particular, have been studied extensively: the growth of the Social Security program (see, for example, Burtless 1986; Burtless and Moffitt 1984; Diamond and Hausman 1984; Hausman and Wise 1985; Sueyoshi 1989), the increased availability and generosity of private pensions (Stock and Wise 1990a, 1990b), and the expansion of federal disability insurance (Bound and Waidmann 1992). One potentially important factor that until recently has not received much attention is the availability of …

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Nitrogen Release During Coal Combustion, Thomas H. Fletcher, Larry L. Baxter, Reginald E. Mitchell, Robert H. Hurt Jan 1996

Nitrogen Release During Coal Combustion, Thomas H. Fletcher, Larry L. Baxter, Reginald E. Mitchell, Robert H. Hurt

Faculty Publications

Experiments in entrained flow reactors at combustion temperatures are performed to resolve the rank dependence of nitrogen release on an elemental basis for a suite of 15 U.S. coals ranging from lignite to low-volatile bituminous. Data were obtained as a function of particle conversion, with overall mass loss up to 99 % on a dry, ash-free basis. Nitrogen release rates are presented relative to both carbon loss and overall mass loss. During devolatilization, fractional nitrogen release from low-rank coals is much slower than fractional mass release and noticeably slower than fractional carbon release. As coal rank increases, fractional nitrogen release …

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Kinetic Analysis Of The Fate Of Nitric Oxide Synthesized By Macrophages In Vitro, Randy S. Lewis, Snait Tamir, Steven R. Tannenbaum, William M. Deen Dec 1995

Kinetic Analysis Of The Fate Of Nitric Oxide Synthesized By Macrophages In Vitro, Randy S. Lewis, Snait Tamir, Steven R. Tannenbaum, William M. Deen

Faculty Publications

To investigate the fate of nitric oxide (NO) synthesized by activated macrophages, the concentrations of NO and its principal reaction products, nitrite (NO2-) and nitrate (NO3-), were measured as a function of time in suspension cultures of RAW264.7 macrophages attached to microcarrier beads. Synthesis of NO became evident 2-5 h after stimulation of the cells, and steady concentrations of NO were achieved after about 9 h. The appearance of NO in the extracellular fluid coincided with the appearance of NO2- and NO3-, which were formed thereafter at approximately equal and constant rates. Using a kinetic model based on rate constants …

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A Massively Parallel Computation Strategy For Fdtd: Time And Space Parallelism Applied To Electromagnetics Problems, Michael A. Jensen, Amir Fijany, Yahya Rahmat-Samii, Jacob Barhen Dec 1995

A Massively Parallel Computation Strategy For Fdtd: Time And Space Parallelism Applied To Electromagnetics Problems, Michael A. Jensen, Amir Fijany, Yahya Rahmat-Samii, Jacob Barhen

Faculty Publications

We present a novel strategy for incorporating massive parallelism into the solution of Maxwell's equations using finite-difference time-domain methods. In a departure from previous techniques wherein spatial parallelism is used, our approach exploits massive temporal parallelism by computing all of the time steps in parallel. Furthermore, in contrast to other methods which appear to concentrate on explicit schemes such as Yee's (1966) algorithm, our strategy uses the implicit Crank-Nicolson technique which provides superior numerical properties. We show that the use of temporal parallelism results in algorithms which offer a massive degree of coarse grain parallelism with minimum communication and synchronization …

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Observation Of Beam-Induced Changes In The Polarization Of Balmer-Α Radiation Emitted Following Beam--Tilted-Foil Transmission, Wang Qi, David D. Allred, Larry V. Knight, Douglas L. Harper, Royal G. Albridge, Norman H. Tolk Dec 1995

Observation Of Beam-Induced Changes In The Polarization Of Balmer-Α Radiation Emitted Following Beam--Tilted-Foil Transmission, Wang Qi, David D. Allred, Larry V. Knight, Douglas L. Harper, Royal G. Albridge, Norman H. Tolk

Faculty Publications

Measurements of the circular polarization of Balmer-α radiation emitted by excited hydrogen atoms, following the transmission of (20-50)-keV protons through thin, tilted amorphous carbon foils, exhibit markedly unexpected behavior as a function of exposure of the foil to the proton beam. Specifically, the circular polarization changes from an initially well understood tilt-angle dependence to a behavior which, for low tilt angles, gives the opposite handedness of circular polarization from that predicted. In addition, the degree of alignment, indicated by the linear Stokes parameter M/I, is enhanced also as a function of dose. These changes in the tilt-angle dependence of the …

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