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I Saw Another Angel Fly, J. Michael Hunter Aug 2000

I Saw Another Angel Fly, J. Michael Hunter

Faculty Publications

This photo essay provides an overview of the history of the Angel Moroni statues, beginning with the angel atop the Nauvoo Temple and continuing through to designs used on the Salt Lake Temple, the Washington D.C. Chapel, the Los Angeles California Temple, the Washington D.C. Temple, and other temples built through 2000. Angel Moroni statues have come to symbolize for Latter-day Saints the restoration of the gospel in the latter days. For Mormons, the Moroni statues herald the gospel being preached “to every nation, and kindred, and tongue, and people” (Rev. 14:6). “I Saw Another Angel Fly” discusses …

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Trajectory Planning For Coordinated Rendezvous Of Unmanned Air Vehicles, Timothy W. Mclain, Randal W. Beard Aug 2000

Trajectory Planning For Coordinated Rendezvous Of Unmanned Air Vehicles, Timothy W. Mclain, Randal W. Beard

Faculty Publications

A trajectory generation strategy that facilitates the coordination of multiple unmanned air vehicles is developed. Of particular interest is the planning of threat-avoiding trajectories that result in the simultaneous arrival of multiple UAVs at their targets. In this approach, paths to the target are modeled using the physical analogy of a chain. A unique strength of the planning approach is the ability to specify or alter the path length by adding or subtracting links from the chain. Desirable paths to the target are obtained by simulating the dynamics of the chain where threats apply repulsive forces to the chain and …

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Fuel Saving Strategies For Separated Spacecraft Interferometry, Timothy Mclain, Randal W. Beard, Christopher A. Bailey Aug 2000

Fuel Saving Strategies For Separated Spacecraft Interferometry, Timothy Mclain, Randal W. Beard, Christopher A. Bailey

Faculty Publications

Separated spacecraft interferometry missions will require spacecraft to move in a coordinated fashion to ensure minimal and balanced consumption of fuel. This paper develops strategies for determining interferometry mission plans that result in significant fuel savings over standard approaches. Simulation results demonstrate that valuable reductions in fuel consumption can be realized by combining the retargeting and imaging maneuvers required to image multiple stellar sources. Fuel-optimal imaging strategies have been developed for two-spacecraft interferometry missions similar to the proposed Space Technology 3 mission using chained local optimization methods. Based on these strategies, sampling pattern guidelines for space-borne interferometry missions have been …

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The Inefficiency Of Batch Training For Large Training Sets, Tony R. Martinez, D. Randall Wilson Jul 2000

The Inefficiency Of Batch Training For Large Training Sets, Tony R. Martinez, D. Randall Wilson

Faculty Publications

Multilayer perceptrons are often trained using error backpropagation (BP). BP training can be done in either a batch or continuous manner. Claims have frequently been made that batch training is faster and/or more "correct" than continuous training because it uses a better approximation of the true gradient for its weight updates. These claims are often supported by empirical evidence on very small data sets. These claims are untrue, however, for large training sets. This paper explains why batch training is much slower than continuous training for large training sets. Various levels of semi-batch training used on a 20,000-instance speech recognition …

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Rescaling The Energy Function In Hopfield Networks, Tony R. Martinez, Xinchuan Zeng Jul 2000

Rescaling The Energy Function In Hopfield Networks, Tony R. Martinez, Xinchuan Zeng

Faculty Publications

In this paper we propose an approach that rescales the distance matrix of the energy function in the Hopfield network for solving optimization problems. We rescale the distance matrix by normalizing each row in the matrix and then adjusting the parameter for the distance term. This scheme has the capability of reducing the effects of clustering in data distributions, which is one of main reasons for the formation of invalid solutions. We evaluate this approach through a large number (20,000) simulations based on 200 randomly generated city distributions of the 10-city traveling salesman problem. The result shows that, compared to …

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Optical Studies Of The X-Ray Transient Xte J2123-058 - I. Photometry, C. Zurita, J. Casares, T. Shahbaz, P. A. Charles, R. I. Hynes, S. Shugarov, V. Goransky, E. P. Pavlenko, Y. Kuznetsova Jul 2000

Optical Studies Of The X-Ray Transient Xte J2123-058 - I. Photometry, C. Zurita, J. Casares, T. Shahbaz, P. A. Charles, R. I. Hynes, S. Shugarov, V. Goransky, E. P. Pavlenko, Y. Kuznetsova

Faculty Publications

We present optical photometry of the X-ray transient XTE J2123-058, obtained in 1998 July-October. The light curves are strongly modulated on the 5.95-h orbital period, and exhibit dramatic changes in amplitude and form during the decline. We used synthetic models, which include the effect of partial eclipses and X-ray heating effects, to estimate the system parameters, and we constrain the binary inclination to be i = 73° ± 4. The model is successful in reproducing the light curves at different stages of the decay by requiring the accretion disc to become smaller and thinner by 30 per cent as the …

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Holes In A Quantum Spin Liquid, Guangyong Xu, G. Aeppli, M. E. Bisher, C. Broholm, J. F. Ditusa, C. D. Frost, T. Ito, K. Oka, R. L. Paul, H. Takagi, M. M.J. Treacy Jul 2000

Holes In A Quantum Spin Liquid, Guangyong Xu, G. Aeppli, M. E. Bisher, C. Broholm, J. F. Ditusa, C. D. Frost, T. Ito, K. Oka, R. L. Paul, H. Takagi, M. M.J. Treacy

Faculty Publications

Magnetic neutron scattering provides evidence for nucleation of antiferromagnetic droplets around impurities in a doped nickel oxide-based quantum magnet. The undoped parent compound contains a spin liquid with a cooperative singlet ground state and a gap in the magnetic excitation spectrum. Calcium doping creates excitations below the gap with an incommensurate structure factor. We show that weakly interacting antiferromagnetic droplets with a central phase shift of π and a size controlled by the correlation length of the quantum liquid can account for the data. The experiment provides a quantitative impression of the magnetic polarization cloud associated with holes in a …

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Classification Of The Lie Bialgebra Structures On The Witt And Virasoro Algebras, Siu Hung Ng, Earl J. Taft Jul 2000

Classification Of The Lie Bialgebra Structures On The Witt And Virasoro Algebras, Siu Hung Ng, Earl J. Taft

Faculty Publications

We prove that all the Lie bialgebra structures on the one sided Witt algebra W1, on the Witt algebra W and on the Virasoro algebra V are triangular coboundary Lie bialgebra structures associated to skew-symmetric solutions r of the classical Yang-Baxter equation of the form r = a ∧ b. In particular, for the one-sided Witt algebra W1 = Der k[t] over an algebraically closed field k of characteristic zero, the Lie bialgebra structures discovered in Michaelis (Adv. Math. 107 (1994) 365-392) and Taft (J. Pure Appl. Algebra 87 (1993) 301-312) are all the Lie bialgebra structures on W1 up …

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Pyridoxamine, An Inhibitor Of Advanced Glycation Reactions, Also Inhibits Advanced Lipoxidation Reactions: Mechanism Of Action Of Pyridoxamine, Joelle M. Onorato, Alicia J. Jenkins, Suzanne R. Thorpe, John W. Baynes Jul 2000

Pyridoxamine, An Inhibitor Of Advanced Glycation Reactions, Also Inhibits Advanced Lipoxidation Reactions: Mechanism Of Action Of Pyridoxamine, Joelle M. Onorato, Alicia J. Jenkins, Suzanne R. Thorpe, John W. Baynes

Faculty Publications

Maillard or browning reactions lead to formation of advanced glycation end products (AGEs) on protein and contribute to the increase in chemical modification of proteins during aging and in diabetes. AGE inhibitors such as aminoguanidine and pyridoxamine (PM) have proven effective in animal model and clinical studies as inhibitors of AGE formation and development of diabetic complications. We report here that PM also inhibits the chemical modification of proteins during lipid peroxidation (lipoxidation) reactions in vitro, and we show that it traps reactive intermediates formed during lipid peroxidation. In reactions of arachidonate with the model protein RNase, PM prevented modification …

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No Hope (Credits) For Louisiana Coffers, Glenn E. Coven, Michael B. Lang Jul 2000

No Hope (Credits) For Louisiana Coffers, Glenn E. Coven, Michael B. Lang

Faculty Publications

No abstract provided.

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Plasma Oscillations And Expansion Of An Ultracold Neutral Plasma, Scott D. Bergeson, S. Kulin, T. C. Killian, S. L. Rolston Jul 2000

Plasma Oscillations And Expansion Of An Ultracold Neutral Plasma, Scott D. Bergeson, S. Kulin, T. C. Killian, S. L. Rolston

Faculty Publications

We report the observation of plasma oscillations in an ultracold neutral plasma. With this collective mode we probe the electron density distribution and study the expansion of the plasma as a function of time. For classical plasma conditions, i.e., weak Coulomb coupling, the expansion is dominated by the pressure of the electron gas and is described by a hydrodynamic model. Discrepancies between the model and observations at low temperature and high density may be due to strong coupling of the electrons.

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Tenfold Magnetoconductance In A Nonmagnetic Metal Film, V. Yu Butko, J. F. Ditusa, P. W. Adams Jul 2000

Tenfold Magnetoconductance In A Nonmagnetic Metal Film, V. Yu Butko, J. F. Ditusa, P. W. Adams

Faculty Publications

The field and temperature dependent transport of highly disordered ultrathin Be films was explored by magnetoconductance (MC) measurements. For this study, the most important result was the observation of the largest MCs not yet accounted in a nonmagnetic metal film.

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Amatory Motifs In Paul's Epistle To The Galatians, David E. Fredrickson Jul 2000

Amatory Motifs In Paul's Epistle To The Galatians, David E. Fredrickson

Faculty Publications

Paul uses familiar amatory terms to speak of the exclusivity of three critical relationships: the apostle and the Galatian congregations, Paul and Christ, and Christ and the congregations.

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Effects Of Fertilizer And Herbicide Application On Nantucket Pine Tip Moth Infestation (Lep., Tortricidae), David L. Kulhavy Jul 2000

Effects Of Fertilizer And Herbicide Application On Nantucket Pine Tip Moth Infestation (Lep., Tortricidae), David L. Kulhavy

Faculty Publications

A study of fertilizer and herbicide e}ects on Nantucket pine tip moth (NPTM), Rhyacionia frustrana (Comstock) infestations was conducted in loblolly pine (Pinus taeda L) plantations in Nacogdoches Co. Texas from 0877 to 0878. Both fertilizer and herbicide applications had effects on NPTM infestation level, pupal weight and host tree oleoresin production. Nitrogen fertilization increased infestation levels, whereas, phosphorus applications tends to decrease infestation rate. Herbicide treatment had a negative effect on NPTM infestations possibly because of decreased moisture stress and increased tree vigour. This is in contrast to general observations of increased NPTM infestations associated with reducing competing …

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Perception, Reputation And Reality: An Empirical Study Of Negotiation Skills, Andrea Kupfer Schneider Jul 2000

Perception, Reputation And Reality: An Empirical Study Of Negotiation Skills, Andrea Kupfer Schneider

Faculty Publications

No abstract provided.

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Editor's Observations: The 2001 Economic Crime Package: A Legislative History, Frank O. Bowman Iii Jul 2000

Editor's Observations: The 2001 Economic Crime Package: A Legislative History, Frank O. Bowman Iii

Faculty Publications

On April 6, 2001, the U.S. Sentencing Commission approved a group of amendments to guidelines governing the sentencing of economic crimes. These measures, collectively known to as the “economic crime package,” are the culmination of some six years of deliberations by both the Conaboy and Murphy Sentencing Commissions working together with interested outside groups such as the defense bar, the Justice Department, probation officers, and the Criminal Law Committee of the U.S. Judicial Conference, The package contains three basic components. First, the now-separate theft and fraud guidelines, Sections 2B1.1 and 2F1.1, will be consolidated into a single guideline. Second, the …

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Case And Comment: Between The Baby And The Breast, S. I. Strong Jul 2000

Case And Comment: Between The Baby And The Breast, S. I. Strong

Faculty Publications

IN Re C (A CHILD) (HIV Test) [1999] 2 F.L.R. 1004, a local authority applied for a specific issue order to test a four-month-old baby girl for HIV. The mother of the child first tested positive for HIV in 1990, but adopted a highly sceptical stance towards generally accepted theories about HIV and AIDS, and refused conventional therapy for herself, preferring to rely on a healthy lifestyle as a prophylactic. The case arose when the baby's physician became aware not only that the mother was breastfeeding the child (despite the risk of transmission of HIV), but that the parents refused …

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Briefing Paper On Problems In Redefining "Loss" (U.S. Sentencing Commission Economic Crime Symposium), Frank O. Bowman Iii Jul 2000

Briefing Paper On Problems In Redefining "Loss" (U.S. Sentencing Commission Economic Crime Symposium), Frank O. Bowman Iii

Faculty Publications

On October 12-13, 2000, the U.S. Sentencing Commission sponsored its Third Symposium On Crime and Punishment in the United States: Federal Sentencing Policy for Economic Crimes and New Technology Offenses. The afternoon of the first day of the meeting was devoted to discussing the concept of “loss” as a measurement of defendant culpability and offense seriousness. The conferees were divided into small groups to discuss discrete sub-issues relating to “loss” and its place in sentencing economic crimes under the Guidelines. Following the small group discussions, the discussion leaders (“facilitators”) addressed a plenary session of the conference to report on the …

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Differentiating The Free Exercise And Establishment Clauses, Carl H. Esbeck Jul 2000

Differentiating The Free Exercise And Establishment Clauses, Carl H. Esbeck

Faculty Publications

The purpose of the Establishment Clause is not to safeguard individual religious rights. That is the role of the Free Exercise Clause, indeed its singular role. The purpose of the Establishment Clause, rather, is as a structural restraint on governmental power. Because of its structural character, the task of the Establishment Clause is to limit government from legislating or otherwise acting on any matter "respecting an establishment of religion." The powers that fall within the scope of the foregoing clause (denied to government, hence within the sole province of religion) and the powers outside this clause (hence, authority vested in …

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States Starting To Offer Legal Protection For Apology, Richard C. Reuben Jul 2000

States Starting To Offer Legal Protection For Apology, Richard C. Reuben

Faculty Publications

There is a small trend a-foot in the state legislatures, and a welcome one at that: Providing some legal protection for people who want to apologize for their role in a harm, but who are fearful because of the possibility that their apologies will later be used against them in legal proceedings.

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Gamma-Ray Bursts Have Millisecond Variability, Katharine C. Walker, Bradley E. Schaefer, E. E. Fenimore Jul 2000

Gamma-Ray Bursts Have Millisecond Variability, Katharine C. Walker, Bradley E. Schaefer, E. E. Fenimore

Faculty Publications

We have performed searches for isolated flares and for steady flickering in the initial ∼ 1 s of gamma-ray burst light curves on the microsecond to millisecond timescales. Two bursts among our sample of 20 revealed four isolated flares with timescales from 256 to 2048 μs. A wavelet analysis for our sample showed low-level flickering for all bursts on timescales from 256 μs to 33 ms, with the majority of bursts containing rise times faster than 4 ms and 30% having rise times faster than 1 ms. These results show that millisecond variability is common in classical bursts and not …

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Theoretical Studies Of The Reactivity Of Cyclopentadienyl Nitrosyl Alkyl Species Of Molybdenum And Tungsten, Rinaldo Poli, Kevin M. Smith Jul 2000

Theoretical Studies Of The Reactivity Of Cyclopentadienyl Nitrosyl Alkyl Species Of Molybdenum And Tungsten, Rinaldo Poli, Kevin M. Smith

Faculty Publications

The reactivity differences observed experimentally for Cp*W(NO)(CH2CMe3)2 and CpMo(NO)(CH2CMe3)2 have been investigated using density functional theory (DFT) techniques. The reactions of the CpW(NO)(CH2) model complex with NH3 and CH4 are more exothermic and have lower activation barriers than the corresponding processes for CpMo(NO)(CH2). The η2(C,H) methane complex CpM(NO)(CH2)(CH4) (M = Mo, W) can undergo two competitive processes: C-H activation to afford CpM(NO)(CH3)2 or loss of methane. The relative barrier heights are almost identical for M = W, whereas the formation of CpM(NO)(CH3)2 is significantly disfavored for M = Mo. The activation of C-H and N-H bonds proceeds via a direct, …

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Surfaces, Tree-Width, Clique-Minors, And Partitions, Guoli Ding, Bogdan Oporowski, Daniel P. Sanders, Dirk Vertigan Jul 2000

Surfaces, Tree-Width, Clique-Minors, And Partitions, Guoli Ding, Bogdan Oporowski, Daniel P. Sanders, Dirk Vertigan

Faculty Publications

In 1971, Chartrand, Geller, and Hedetniemi conjectured that the edge set of a planar graph may be partitioned into two subsets, each of which induces an outerplanar graph. Some partial results towards this conjecture are presented. One such result, in which a planar graph may be thus edge partitioned into two series-parallel graphs, has nice generalizations for graphs embedded onto an arbitrary surface and graphs with no large clique-minor. Several open questions are raised. © 2000 Academic Press.

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An Approach To Program Assessment: Locating Indicators Of A Coherent Program, Murrary F. Mitchell Jul 2000

An Approach To Program Assessment: Locating Indicators Of A Coherent Program, Murrary F. Mitchell

Faculty Publications

No abstract provided.

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Almost Block Diagonal Linear Systems: Sequential And Parallel Solution Techniques, And Applications, P. Amodio, J.R. Cash, G. Roussos, R.W. Wright, G. Fairweather, I. Gladwell, G.L. Kraut, M. Paprzycki Jul 2000

Almost Block Diagonal Linear Systems: Sequential And Parallel Solution Techniques, And Applications, P. Amodio, J.R. Cash, G. Roussos, R.W. Wright, G. Fairweather, I. Gladwell, G.L. Kraut, M. Paprzycki

Faculty Publications

Almost block diagonal (ABD) linear systems arise in a variety of contexts, specifically in numerical methods for two-point boundary value problems for ordinary differential equations and in related partial differential equation problems. The stable, efficient sequential solution of ABDs has received much attention over the last fifteen years and the parallel solution more recently. We survey the fields of application with emphasis on how ABDs and bordered ABDs (BABDs) arise. We outline most known direct solution techniques, both sequential and parallel, and discuss the comparative efficiency of the parallel methods. Finally, we examine parallel iterative methods for solving BABD systems. …

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Roughening, Deroughening, And Nonuniversal Scaling Of The Interface Width In Electrophoretic Deposition Of Polymer Chains, Frank W. Bentrem, Ras B. Pandey, Fereydoon Family Jul 2000

Roughening, Deroughening, And Nonuniversal Scaling Of The Interface Width In Electrophoretic Deposition Of Polymer Chains, Frank W. Bentrem, Ras B. Pandey, Fereydoon Family

Faculty Publications

Growth and roughness of the interface of deposited polymer chains driven by a field onto an impenetrable adsorbing surface are studied by computer simulations in (2 + 1) dimensions. The evolution of the interface width W shows a crossover from short-time growth described by the exponent beta(1) to a long-time growth with exponent beta(2) (>beta(1)) Tne saturated width increases, i.e., the interface roughens, with the molecular weight L-c, but the roughness exponent alpha (from W-s similar to L-alpha) becomes negative in contrast to models for particle deposition; cr depends on the chain length-a nonuniversal scaling with the substrate length …

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Neural Networks Versus Nonparametric Neighbor-Based Classifiers For Semisupervised Classification Of Landsat Thematic Mapper Imagery, Perry J. Hardin Jul 2000

Neural Networks Versus Nonparametric Neighbor-Based Classifiers For Semisupervised Classification Of Landsat Thematic Mapper Imagery, Perry J. Hardin

Faculty Publications

Semisupervised classification is one approach to converting multiband optical and infrared imagery into landcover maps. First, a sample of image pixels is extracted and clustered into several classes. The analyst next combines the clusters by hand to create a smaller set of groups that correspond to a useful landcover classification. The remaining image pixels are then assigned to one of the aggregated cluster groups by use of a per-pixel classifier. Since the cluster aggregation process frequently creates groups with multivariate shapes ill suited for parametric classifiers, there has been renewed interest in nonparametric methods for the task. This research reports …

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Electronic Billboards Along The Information Superhighway: Liability Under The Lanham Act For Using Trademarks To Key Internet Banner Ads, Christine Galbraith Davik Jul 2000

Electronic Billboards Along The Information Superhighway: Liability Under The Lanham Act For Using Trademarks To Key Internet Banner Ads, Christine Galbraith Davik

Faculty Publications

With almost one billion web pages on the Internet today, a search engine is a necessity at times. But search engines are also for-profit ventures and the financial success of these sites hinges on advertising revenue. One of the ways in which these sites generate income is by selling “keywords” to advertisers. Although there has been only one judicial decision – Playboy Enterprises, Inc. v. Netscape Communications – involving banner ads keyed to trademarks, it will undoubtedly not be the last. This article argues that despite the invisible nature of this unauthorized trademark use, the common practice of keying a …

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Long-Term Pyrene Exposure Of Grass Shrimp, Palaemonetes Pugio, Affects Molting And Reproduction Of Exposed Males And Offspring Of Exposed Females, Eva Oberdörster, Marius Brouwer, Thea Hoexum-Brouwer, Steve Manning, John A. Mclachlan Jul 2000

Long-Term Pyrene Exposure Of Grass Shrimp, Palaemonetes Pugio, Affects Molting And Reproduction Of Exposed Males And Offspring Of Exposed Females, Eva Oberdörster, Marius Brouwer, Thea Hoexum-Brouwer, Steve Manning, John A. Mclachlan

Faculty Publications

The objective of this study was to investigate the impact of long-term pyrene exposure on molting and reproduction in the model estuarine invertebrate, the grass shrimp (Palaemonetes pugio). Grass shrimp were exposed to measured concentrations of 5.1, 15.0, and 63.4 ppb (mu g/L) pyrene for 6 weeks, during which time we determined molting and survivorship. At the end of the exposure, we immediately sacrificed some of the shrimp for biomarker (CYP1A and vitellin) analyses. The remaining shrimp were used to analyze fecundity and embryo survivorship during an additional 6 weeks after termination of pyrene exposure. Male shrimp at the highest …

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The Cover Design, Thomas D. Walker Jul 2000

The Cover Design, Thomas D. Walker

Faculty Publications

No abstract provided.

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