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Knot Intervals And Multi-Degree Splines, Thomas W. Sederberg, Jianmin Zheng, Xiaowen Song May 2003

Knot Intervals And Multi-Degree Splines, Thomas W. Sederberg, Jianmin Zheng, Xiaowen Song

Faculty Publications

This paper studies the merits of using knot interval notation for B-spline curves, and presents formulae in terms of knot intervals for common B-spline operations such as knot insertion, differentiation, and degree elevation. Using knot interval notation, the paper introduces MD-splines, which are B-spline-like curves that are comprised of polynomial segments of various degrees (MD stands for \multi-degree"). MD-splines are a generalization of B-spline curves in that if all curve segments in an MD-spline have the same degree, it reduces to a B-spline curve. The paper focuses on MD-splines of degree 1, 2, and 3, as well as degree 1 …

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Simplifying Ocr Neural Networks With Oracle Learning, Tony R. Martinez, Joshua Menke May 2003

Simplifying Ocr Neural Networks With Oracle Learning, Tony R. Martinez, Joshua Menke

Faculty Publications

Often the best model to solve a real world problem is relatively complex. The following presents oracle learning, a method using a larger model as an oracle to train a smaller model on unlabeled data in order to obtain (1) a simpler acceptable model and (2) improved results over standard training methods on a similarly sized smaller model. In particular, this paper looks at oracle learning as applied to multi-layer perceptrons trained using standard backpropagation. For optical character recognition, oracle learning results in an 11.40% average decrease in error over direct training while maintaining 98.95% of the initial oracle accuracy.

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A Noise Filtering Method Using Neural Networks, Tony R. Martinez, Xinchuan Zeng May 2003

A Noise Filtering Method Using Neural Networks, Tony R. Martinez, Xinchuan Zeng

Faculty Publications

During the data collecting and labeling process it is possible for noise to be introduced into a data set. As a result, the quality of the data set degrades and experiments and inferences derived from the data set become less reliable. In this paper we present an algorithm, called ANR (automatic noise reduction), as a filtering mechanism to identify and remove noisy data items whose classes have been mislabeled. The underlying mechanism behind ANR is based on a framework of multi-layer artificial neural networks. ANR assigns each data item a soft class label in the form of a class probability …

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Microstructure Sensitive Design Of An Orthotropic Plate Subjected To Tensile Load, Brent L. Adams, Mark Lyons, Joshua R. Houskamp, Surya R. Kalidindi May 2003

Microstructure Sensitive Design Of An Orthotropic Plate Subjected To Tensile Load, Brent L. Adams, Mark Lyons, Joshua R. Houskamp, Surya R. Kalidindi

Faculty Publications

Financial support for this work was provided by the Army Research Office, Proposal No. 42566-MS, Dr. David Stepp, Program Director and Army Research Lab, Dr. Scott Schoenfeld, Point of Contact. Microstructure Sensitive Design (MSD) is a newly developed mathematical framework that facilitates rigorous solutions to inverse problems in microstructure design of materials. In this paper, this methodology is applied to an orthotropic thin plate containing a circular hole subjected to an in-plane uniaxial tensile load. The primary design objective is to maximize the load carrying capacity of the plate while avoiding plastic deformation in the plate. Making use of the …

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Concurrently Learning Neural Nets: Encouraging Optimal Behavior In Cooperative Reinforcement Learning Systems, Nancy Fulda, Dan A. Ventura May 2003

Concurrently Learning Neural Nets: Encouraging Optimal Behavior In Cooperative Reinforcement Learning Systems, Nancy Fulda, Dan A. Ventura

Faculty Publications

Reinforcement learning agents interacting in a common environment often fail to converge to optimal system behaviors even when the individual goals of the agents are fully compatible. Claus and Boutilier have demonstrated that the use of joint action learning helps to overcome these difficulties for Q-learning systems. This paper studies an application of joint action learning to systems of neural networks. Neural networks are a desirable candidate for such augmentations for two reasons: (1) they may be able to generalize more effectively than Q-learners, and (2) the network topology used may improve the scalability of joint action learning to systems …

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Comparison Of Written And Oral Examinations In A Baccalaureate Medical-Surgical, Patricia Rushton, Dennis L. Eggett May 2003

Comparison Of Written And Oral Examinations In A Baccalaureate Medical-Surgical, Patricia Rushton, Dennis L. Eggett

Faculty Publications

Nursing students traditionally have been evaluated with an objective written examination. This method has shown some benefits and disadvantages. This project examined the value of oral examinations in evaluating nursing students. Five groups of students were evaluated with different forms of testing, some with only written tests, others with only oral examinations, some with a combination of both types of evaluations. The results showed that oral examinations can effectively evaluate the student's comprehension and application of clinical information in a clinical situation, as shown in higher test results, compared with oral written examinations, and positive student comments. Oral examination can …

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Decay Of Trapped-Particle Asymmetry Modes In Non-Neutral Plasmas In A Malmberg-Penning Trap, Grant W. Mason May 2003

Decay Of Trapped-Particle Asymmetry Modes In Non-Neutral Plasmas In A Malmberg-Penning Trap, Grant W. Mason

Faculty Publications

The mechanism for the strong damping of diocotron-like azimuthal trapped-particle asymmetry modes in a Malmberg-Penning trap is investigated with a detailed three-dimensional particle-in-cell computer simulation. The m = 1,kzis not equal to 0 modes are created by a voltage squeeze from a mid-detector ring followed by a displacement of trapped particles in opposite directions on either side of the ring. The voltage squeeze creates a population of particles confined to half the trap length (trapped) and a population of particles that move longitudinally along the full length of the cylinder (untrapped). The damping of the modes is found to be …

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Model-Based Human-Centered Task Automation: A Case Study In Acc System Design, Michael A. Goodrich, Erwin R. Boer May 2003

Model-Based Human-Centered Task Automation: A Case Study In Acc System Design, Michael A. Goodrich, Erwin R. Boer

Faculty Publications

Engineers, business managers, and governments are increasingly aware of the importance and difficulty of integrating technology and humans. The presence of technology can enhance human comfort, efficiency, and safety, but the absence of human factors analysis can lead to uncomfortable, inefficient, and unsafe systems. Systematic human-centered design requires a basic understanding of how humans generate and manage tasks. A very useful model of human behavior generation can be obtained by recognizing the task-specific role of mental models in not only guiding execution of skills but also managing initiation and termination of these skills. By identifying the human operator’s mental models …

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Linking Mentoring And Electronic Portfolios For Utah Educators, Charles R. Graham, Kathleen Webb, Carol Lee Hawkins, David Harlan May 2003

Linking Mentoring And Electronic Portfolios For Utah Educators, Charles R. Graham, Kathleen Webb, Carol Lee Hawkins, David Harlan

Faculty Publications

Starting January 2003 Utah districts are required to provide each entry level teacher with a trained mentor (EYE, 2003). Additionally, each entry level teacher will be required to create a standards-based teaching portfolio to submit to the district as part of the Level 2 licensure process. This paper provides practical information about standards-based electronic teaching portfolios and how the portfolios can be used as a vehicle for mentoring novice teachers.

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Annotated Bibliography Of Research In The Teaching Of English, Deborah Brown, Catherine Beavis, Judith Kalman, Macrina Gómez, Gert Rijlaarsdam, Anne D'Antonio Stinson, Melissa E. Whiting May 2003

Annotated Bibliography Of Research In The Teaching Of English, Deborah Brown, Catherine Beavis, Judith Kalman, Macrina Gómez, Gert Rijlaarsdam, Anne D'Antonio Stinson, Melissa E. Whiting

Faculty Publications

No abstract provided.

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Rapid Prototyping Of Digital Controls For Power Electronics, Antonello Monti, Enrico Santi, Roger A. Dougal, Marco Riva May 2003

Rapid Prototyping Of Digital Controls For Power Electronics, Antonello Monti, Enrico Santi, Roger A. Dougal, Marco Riva

Faculty Publications

The process for designing digital controls for power electronics is typically quite convoluted and affords many opportunities for errors to occur. We present here a new and complete, method for rapid prototyping of digital controls that allows rapid realization of new designs. The approach uses a collection of tools that include both software (the virtual test bed (VTB) and Matlab/Simulink) and hardware (dSpace DSP). An example application of the methodology completes the discussion.

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Enabling Remote Access To Personal Electronic Medical Records, James K. Archibald, Eric S. Hall, Charles D. Knutson, David K. Vawdrey May 2003

Enabling Remote Access To Personal Electronic Medical Records, James K. Archibald, Eric S. Hall, Charles D. Knutson, David K. Vawdrey

Faculty Publications

Millions of people suffer from medical conditions that should be made known to healthcare practitioners prior to treatment. Paramedics and emergency room doctors cannot provide optimal care without sufficient knowledge of a patient’s medical history. Lacking patient information such as allergies, current prescriptions, and preexisting conditions, medical professionals are often forced to either delay treatment or rely on instincts. Medical mistakes in situations like these kill thousands of people and cost an estimated US$37 billion each year in the United States [1]. With the advent of electronic medical records (EMRs), patient information can be stored in computer databases at hospitals …

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Evidence For Survival Of Pleistocene Climatic Changes In Northern Refugia By The Land Snail Trochoidea Geyeri, David Posada, Markus Pfenninger, Frederic Magnin Apr 2003

Evidence For Survival Of Pleistocene Climatic Changes In Northern Refugia By The Land Snail Trochoidea Geyeri, David Posada, Markus Pfenninger, Frederic Magnin

Faculty Publications

The study of organisms with restricted dispersal abilities and presence in the fossil record is particularly adequate to understand the impact of climate changes on the distribution and genetic structure of species. Trochoidea geyeri (Soos 1926) is a land snail restricted to a patchy, insular distribution in Germany and France. Fossil evidence suggests that current populations of T. geyeri are relicts of a much more widespread distribution during more favourable climatic periods in the Pleistocene. Results: Phylogeographic analysis of the mitochondrial 16S rDNA and nuclear ITS-1 sequence variation was used to infer the history of the remnant populations of T. …

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Toward A Better Understanding Of The Comparatively High Prostate Cancer Incidence Rates In Utah, Ray M. Merrill, Sterling C. Hilton, Jared D. Sturgeon, Charles L. Wiggins Apr 2003

Toward A Better Understanding Of The Comparatively High Prostate Cancer Incidence Rates In Utah, Ray M. Merrill, Sterling C. Hilton, Jared D. Sturgeon, Charles L. Wiggins

Faculty Publications

This study assesses whether comparatively high prostate cancer incidence rates among white men in Utah represent higher rates among members of the Church of Jesus Christ of Latter-day Saints (LDS or Mormons), who comprise about 70% of the state's male population, and considers the potential influence screening has on these rates. Methods: Analyses are based on 14,693 histologically confirmed invasive prostate cancer cases among men aged 50 years and older identified through the Utah Cancer Registry between 1985 and 1999. Cancer records were linked to LDS Church membership records to determine LDS status. Poisson regression was used to derive rate …

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Optically Oriented And Detected Electron Spin Resonance In A Lightly Doped N-Gaas Layer, John S. Colton, T. A. Kennedy, A. S. Bracker, D. Gammon, J. B. Miller Apr 2003

Optically Oriented And Detected Electron Spin Resonance In A Lightly Doped N-Gaas Layer, John S. Colton, T. A. Kennedy, A. S. Bracker, D. Gammon, J. B. Miller

Faculty Publications

Spin resonance of localized electrons bound to donors in a specially designed n-GaAs layer has been performed at 236 MHz and 41 mT, using circular polarized light to polarize the electrons and photoluminescence to detect the electronic polarization. The polarization was diminished under the resonance condition. The electronic g factor obtained by this measurement is - 0.41 ± 0.01. The resonance linewidth of 2 mT corresponds to a spin lifetime of 28 ns. In order to observe the electronic spin resonance, nuclear effects were eliminated by application of rf fields to simultaneously resonate the nuclear spins.

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Racial Attitudes Among South African Young Adults: A Four-Year Follow-Up Study, Timothy B. Smith, Christopher R. Stones, Anthony Naidoo Apr 2003

Racial Attitudes Among South African Young Adults: A Four-Year Follow-Up Study, Timothy B. Smith, Christopher R. Stones, Anthony Naidoo

Faculty Publications

Due to many social changes that have occurred in South Africa since the first democratic elections in 1994, careful scrutiny must be given to the racial attitudes of South Africa’s young adults. Their degree of acceptance of the doctrine of deracialisation and reconciliation represents a hope or a warning in regard to a stable future. A follow up study was thus carried out in order to update data collected in 1995, with the hypothesis that, over time, greater acceptance of other racial groups would be reported. The authors examined the differences among the 180 Xhosa-speaking black, 89 so-called coloured, and …

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Building Solid Models From Boreholes And User-Defined Cross-Sections, Alan M. Lemon, Norman L. Jones Apr 2003

Building Solid Models From Boreholes And User-Defined Cross-Sections, Alan M. Lemon, Norman L. Jones

Faculty Publications

Solid models of geologic structures are useful tools for geologists and engineers. Solid models completely and unambiguously define the stratigraphy for the site being modeled, including complex boundaries and embedded seams. Past research has focused on the “set operations” approach to create solid models. Whereas the set operations approach is flexible, it requires significant user intervention and is therefore difficult to use. A simple approach for generating solid models from borehole data, called the horizons method, is presented. The horizons method can be used to build solids directly from borehole data with minimal user intervention. The user first assigns horizon …

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Living As Gods On Our Skin: The Vigil Of Pentecost And Pentecost Sunday (John 7:37-39), David E. Fredrickson Apr 2003

Living As Gods On Our Skin: The Vigil Of Pentecost And Pentecost Sunday (John 7:37-39), David E. Fredrickson

Faculty Publications

What will it mean to “thirst” for Jesus? The “thirst” spoken of in John 7 is much more passionate than we have been trained to imagine. Thirst brings about fantasy. Fantasy takes me out of my everyday existence and opens me to the possibility that things are not as they appear to be.

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Duo Glossaria. Anonymi Montepessulanensis Dictionarius: Le Glossaire Latin-Français Du Ms. Montpellier H236, Scott Gwara Apr 2003

Duo Glossaria. Anonymi Montepessulanensis Dictionarius: Le Glossaire Latin-Français Du Ms. Montpellier H236, Scott Gwara

Faculty Publications

No abstract provided.

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Aintegumenta Utilizes A Mode Of Dna Recognition Distinct From That Used By Proteins Containing A Single Ap2 Domain, Beth A. Krizek Apr 2003

Aintegumenta Utilizes A Mode Of Dna Recognition Distinct From That Used By Proteins Containing A Single Ap2 Domain, Beth A. Krizek

Faculty Publications

The Arabidopsis protein AINTEGUMENTA (ANT) is an important regulator of organ growth during flower development. ANT is a member of the AP2 subclass of the AP2/ERF family of plant-specific transcription factors. These proteins contain either one or two copies of a DNA-binding domain called the AP2 domain. Here, it is shown that ANT can act as a transcriptional activator in yeast through binding to a consensus ANT-binding site. This activity was used as the basis for a genetic screen to identify amino acids that are critical for the DNA binding ability of ANT. Mutants that showed reduced or no activation …

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Modes In A Non-Neutral Plasma Of Finite Length, M = 0,1, S. Neil Rasband, Ross L. Spencer Apr 2003

Modes In A Non-Neutral Plasma Of Finite Length, M = 0,1, S. Neil Rasband, Ross L. Spencer

Faculty Publications

For realistic, cold equilibria of finite length representing a pure electron plasma confined in a cylindrical Malmberg–Penning trap, the mode spectrum for Trivelpiece–Gould, m=0, and for diocotron, m=1, modes is calculated numerically. A novel method involving finite elements is used to successfully compute eigenfrequencies and eigenfunctions for plasma equilibria shaped like pancakes, cigars, long cylinders, and all things in between. Mostly sharp-boundary density configurations are considered but also included in this study are diffuse density profiles including ones with peaks off axis leading to instabilities. In all cases the focus has been on elucidating the role of finite length in …

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To Be Or Not To Be Ideophonically Impoverished, Janis B. Nuckolls Apr 2003

To Be Or Not To Be Ideophonically Impoverished, Janis B. Nuckolls

Faculty Publications

This paper addresses a current debate over the universality of ideophones, a class of expressions that are used to simulate, through performative foregrounding, the salient processes and perceptions of everyday life experience. Using data from Quechua-speaking Runa in Amazonian Ecuador, I argue for a view of ideophones as a type of cultural discourse through which speakers align themselves with nonhuman life forms and forces of nature. This alignment is suggested by the special performative properties of ideophones, which collapse the distinction between a speech event and a narrated event, thus compelling a speaker to become an action, event, or process, …

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Breaking The Bank, Ivan Davis Apr 2003

Breaking The Bank, Ivan Davis

Faculty Publications

No abstract provided.

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Those “Marching Men”, Meredith Jones-Gray Apr 2003

Those “Marching Men”, Meredith Jones-Gray

Faculty Publications

No abstract provided.

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Whatever Happened To Palestine?, April Summitt Apr 2003

Whatever Happened To Palestine?, April Summitt

Faculty Publications

No abstract provided.

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Ars Edendi: A Practical Introduction To Editing Medieval Latin Texts, Scott Gwara Apr 2003

Ars Edendi: A Practical Introduction To Editing Medieval Latin Texts, Scott Gwara

Faculty Publications

No abstract provided.

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Trophies Of War And Empire: The Archival Heritage Of Ukraine, World War Ii, And The International Politics Of Restitution. By Patricia Kennedy Grimsted. Harvard Papers In Ukrainian Studies. Cambridge, Mass.: Harvard Ukrainian Research Institute, 2001. Isbn: 0-916458-76-8., Jennifer A. Marshall Apr 2003

Trophies Of War And Empire: The Archival Heritage Of Ukraine, World War Ii, And The International Politics Of Restitution. By Patricia Kennedy Grimsted. Harvard Papers In Ukrainian Studies. Cambridge, Mass.: Harvard Ukrainian Research Institute, 2001. Isbn: 0-916458-76-8., Jennifer A. Marshall

Faculty Publications

No abstract provided.

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The Struggle For School Desegregation In Cincinnati Before 1954, Davison M. Douglas Apr 2003

The Struggle For School Desegregation In Cincinnati Before 1954, Davison M. Douglas

Faculty Publications

No abstract provided.

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Influence Of A Cyclonic Eddy On Microheterotroph Biomass And Carbon Export In The Lee Of Hawaii, Robert R. Bidigare, Claudia R. Benitez-Nelson, Carrie L. Leonard, Paul D. Quay, Michael L. Parsons, David G. Foley, Michael P. Seki Mar 2003

Influence Of A Cyclonic Eddy On Microheterotroph Biomass And Carbon Export In The Lee Of Hawaii, Robert R. Bidigare, Claudia R. Benitez-Nelson, Carrie L. Leonard, Paul D. Quay, Michael L. Parsons, David G. Foley, Michael P. Seki

Faculty Publications

[1] A multi‐platform sampling strategy was used to investigate carbon cycling in a cold‐core eddy that formed in the lee of Hawaii during September 2000. Microheterotroph biomass and 234Th‐derived carbon export rates within the eddy were 2 to 3 times higher than those observed for adjacent waters. If this eddy is representative of other cyclonic eddies that are frequently formed in the lee of Hawaii, then eddy activity may significantly enhance the areal efficiency of the biological pump and facilitate the transfer of organic carbon to organisms inhabiting the mesopelagic and abyssal‐benthic zones of this subtropical ecosystem.

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Interaction Energy Surfaces Of Small Hydrocarbon Molecules, Richard L. Rowley, Jukka-Pekka Jalkanen, Tapani A. Pakkanen, Yan Yang Mar 2003

Interaction Energy Surfaces Of Small Hydrocarbon Molecules, Richard L. Rowley, Jukka-Pekka Jalkanen, Tapani A. Pakkanen, Yan Yang

Faculty Publications

Nonbonding interactions of small alkane molecules were studied with ab initio methods. Previously reported energy data for ethane and propane dimers were supplemented with 1747 new configurations of dimers involving slightly larger hydrocarbons. The completed work provides interaction energy surfaces for all combinations of dimer pairs involving ethane, propane, isobutane, and neopentane and thus contains information of all chemical groups found in acyclic alkanes. The strongest attraction of the studied molecule pairs was encountered in isobutane C2h dimer, where an energy minimum of -1.784 kcal mol^-1 at 4.28 Angstroms separation of centermost carbon atoms was observed. The composite data set …

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