Physical Sciences and Mathematics Commons^™

Quintuples With Square Triplets, Stan Wagon

Stan Wagon, Retired

No abstract provided.

Articles Pre-1996, Daniel Kaplan

Daniel T. Kaplan

No abstract provided.

A Thermodynamic Model For Pressurized Solids, Miron Kaufman, Herbert Schlosser

Miron Kaufman

A thermodynamic model for solids under pressure is developed by assuming the universal equation of state and that under zero pressure the free energy is equal to the harmonic crystal (Debye) free energy. The model is applied to gold. In the case of nanocrystals this model reproduces the observed enhancement of the isobaric heat capacity and of the thermal expansion. Our model calculations are free of the ambiguities and inconsistencies connected with the Gruneisen equation, which was used in previous theoretical work.

Comment On 'Simulation Of A Two-Dimensional Rayleigh-Bénard System Using The Direct Simulation Monte Carlo Method, Alejandro Garcia, F. Baras, M. Malek Mansour

Alejandro Garcia

No abstract provided.

A Consistent Boltzmann Algorithm, Alejandro Garcia, F. Alexander, B. Alder

Alejandro Garcia

The direct simulation Monte Carlo method for the Boltzmann equation is modified by an additional displacement in the advection process and an enhanced collision rate in order to obtain the exact hard sphere equation of state at all densities. This leads to consistent thermodynamic and transport properties in the low density (Boltzmann) regime. At higher densities transport properties are comparable to the predictions of the Enskog model. The algorithm is faster than molecular dynamics at low and moderate densities and readily run on a parallel architecture

Student Evaluations Of Teaching Effectiveness: The Interpretation Of Observational Data And The Principle Of Faute De Mieux, B. Burt Gerstman

B. Burt Gerstman

Student opinion surveys are important but widely misunderstood tools for evaluating teaching effectiveness. In this brief review, an analogy is drawn between the use and interpretation of observational data for public health and biomedical research and the use of student opinion data in evaluating teach ing effectiveness. Sources of systematic error in the form of selection bias, information bias, and confounding are defined and illustrated. Original data concerning intermittent "quid pro quo" confounding (i.e., the effect of expected grades on student evaluations of teaching) are presented. Finally, the principle of faute de mieux ("lack of anything better") and the interpretation …

Detection Of Dityrosine In Apoferritin, Stephen E. Bialkowski

Stephen E. Bialkowski

Laser-excited fluorescence spectroscopy was adopted for dityrosine detection in horse spleen apoferritin. Dityrosine was identified in horse spleen apoferritin. Fractionation of acid-hydrolyzed horse spleen apoferritin showed fluorescence attributed to dityrosine, and other compounds, excited by 325-nm laser radiation. The other fluorescent compounds resulted in a broad fluorescence emission spectrum of horse spleen apoferritin. The broad emission band overlapped with the fluorescence emission spectrum of pure dityrosine. Fractionation of horse spleen apoferritin acid hydrolysate prior to laser-excited fluorescence detection was necessary for dityrosine quantitative analysis. The concentration of dityrosine in horse spleen apoferritin was 2.5% (mol/mol), estimated from the method of …

Laser Excited Fluorescence Of Dityrosine, Sahar F. Mahmoud, Stephen E. Bialkowski

Stephen E. Bialkowski

In this research, laser-excited fluorescence was examined for sensitive detection of aqueous dityrosine. Samples were excited with a 6.3-mW, 325-nm helium-cadmium laser focused into a small volume-fluorescence cell with a 10-cm lens. The resulting fluorescence emission was collected perpendicular to the excitation and detected with two different schemes. An optical bandpass filter was used with a photomultiplier tube for sensitive quantitative measurement, while a photodiode array detector was used in conjunction with a spectrograph for qualitative characterization of fluorescence emission spectra. Dityrosine detection on the order of 2 × 10^-11 M was obtained with the use of the photomultiplier …

A Spigot Algorithm For The Digits Of Pi, Stan Wagon

Stan Wagon, Retired

No abstract provided.

Shape Criteria Of Bernstein-Bezier Polynomials Over Simplexes, Tian-Xiao He

Tian-Xiao He

This paper discusses the criteria of convexity, monotonicity, and positivity of Bernstein- Bezier polynomials over simplexes.

Supportability Analysis Of Optimal Utilization Of Shared Strategic Support Resources, Caroline Lubert, J. Knezevic

Caroline P Lubert

No abstract provided.

Designing Chemical Education Hypermedia For The World-Wide Web, Brian Tissue, Ching-Wan Yip, Yue-Ling Wong, Mark Anderson

Mark R. Anderson

No abstract is currently available.

The Effect Of Solid Surfaces On Turbulent Jet Noise, Caroline Lubert, P. Carpenter

Caroline P Lubert

No abstract provided.

Modeling Volatility Dynamics, Douglas Steigerwald

Douglas G. Steigerwald

No abstract provided.

Quark Masses And Binding-Energy In A Proton - Answer To Question Number-2a, Br Holstein

Barry R Holstein

No abstract provided.

Calculus In The Operating Room, Stan Wagon, P. Toy

Stan Wagon, Retired

No abstract provided.

Miocene Paleogeography Of West-Central California--Offset Along The San Gregorio-Hosgri Fault Zone, Clarence Hall Jr, Mark Sutherland, Raymond Ingersoll

Mark Sutherland

The major faults that occur in the region are described and the amount of lateral offset used to construct palinspastic maps is given. The longest, most controversial, and most critical fault relative to the palinspastic maps is the San Gregorio-San Simeon-Hosgri fault, which is discussed in detail

Seizure Threshold In Electroconvulsive Therapy: I. Initial Seizure Threshold, C. Edward Coffey, Joseph Lucke, Richard D. Weiner, Andrew D. Krystal, Michael Aque

Richard R Weiner

We measured initial seizure threshold by means of a structured stimulus dosage titration procedure in a clinical sample of 111 depressed patients undergoing brief-pulse, constantcurrent electroconvulsive therapy (ECT). Initial seizure threshold was approximately 60 millicoumbs (mc) (10 Joules) on average, but varied widely (6-fold) across patients. Initial seizure threshold was predicted by four variables: electrode placement (higher with bilateral), gender (higher in men), age (higher with increasing age), and dynamic impedance (inverse relationship). Use of neuroleptic medication was associated with a lower seizure threshold. EEG seizure duration was inversely related to initial seizure threshold, but no other relations with seizure …

Asymptotic Behavior Of Solutions Of Asymptotically Constant Coefficient System Of Linear Differential Equations, William F. Trench

William F. Trench

No abstract provided.

Invertibly Convergent Infinite Products Of Matrices, With Applications To Difference Equations, William F. Trench

William F. Trench

No abstract provided.

Volatility, Douglas G. Steigerwald, Stephen Leroy

Douglas G. Steigerwald

How should one determine if capital markets are efficient? We examine the statistical foundations of tests of efficiency.

Assessing Sequential Oncogene Amplification In Human Breast Cancer, Laura E. Janocko, Joseph F. Lucke, David W. Groft, Kathryn A. Brown, Charles A. Smith, Agnese A. Pollice, Sarita G. Singh, Robert Yakulis, Robert J. Hartsock, Stanley E. Shackney

Charles Kay Smith

Studies of amplification and/or overexpression of c-myc, HER-2/neu, and H-ras in breast cancer have shown that each is associated with a poor prognosis. The purpose of this study was to explore the possibility that there is a preferred sequence of amplification of these oncogenes in breast cancer. The frequencies of amplification and patterns of co-amplification of c-myc, HER-2/neu, and H-ras were studied in a group of 84 breast cancers. The data suggested a preferred sequence of amplification that consisted of c-myc amplification-HER-2/neu amplification-H-ras amplification. This model was supported by loglinear analysis. In addition, the levels of amplification of JC-A, a …

Significant Differences: The Construction Of Knowledge, Objectivity, And Dominance, Donna M. Hughes Dr.

Donna M. Hughes

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Encryption/Decryption Dickwads Of Cipherspace, Raleigh Muns

Raleigh Muns

Assessing Sequential Oncogene Amplification In Human Breast Cancer, Laura E. Janocko, Joseph F. Lucke, David W. Groft, Kathryn A. Brown, Charles A. Smith, Agnese A. Pollice, Sarita G. Singh, Robert Yakulis, Robert J. Hartsock, Stanley E. Shackney

Charles Kay Smith

Studies of amplification and/or overexpression of c-myc, HER-2/neu, and H-ras in breast cancer have shown that each is associated with a poor prognosis. The purpose of this study was to explore the possibility that there is a preferred sequence of amplification of these oncogenes in breast cancer. The frequencies of amplification and patterns of co-amplification of c-myc, HER-2/neu, and H-ras were studied in a group of 84 breast cancers. The data suggested a preferred sequence of amplification that consisted of c-myc amplification-HER-2/neu amplification-H-ras amplification. This model was supported by loglinear analysis. In addition, the levels of amplification of JC-A, a …

Determination Of Plasma Parameters In A Dc Arcjet Part Ii, Scott Reeve, Wayne Weimer

Scott Reeve

No abstract provided.

Critical Dynamics Of Nonconserved Ising-Like Systems, K. E. Bassler, Beate Schmittmann

Beate Schmittmann

We show that the dynamical fixed point of Ising-like models, characterized by a single scalar, nonconserved ordering field, is stable near four dimensions with respect to all dynamic perturbations, including those of a nonequilibrium nature.

Kinetics Of Clustering In Traffic Flows, E. Ben-Naim, P. L. Krapivsky, S. Redner

Eli Ben-Naim

We study a simple aggregation model that mimics the clustering of traffic on a one-lane roadway. In this model, each ``car'' moves ballistically at its initial velocity until it overtakes the preceding car or cluster. After this encounter, the incident car assumes the velocity of the cluster which it has just joined. The properties of the initial distribution of velocities in the small velocity limit control the long-time properties of the aggregation process. For an initial velocity distribution with a power-law tail at small velocities, $\pvim$ as $v \to 0$, a simple scaling argument shows that the average cluster size …

Sixth U.S.-Japan Seminar On Polymer Synthesis: Macromolecular Design For Advanced Materials, Otto Vogl, Shiro Kobayashi

Otto Vogl

No abstract provided.