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2003

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Deformation Of A Peridynamic Bar, S. A. Silling, M. Zimmermann, R. Abeyaratne Jan 2003

Deformation Of A Peridynamic Bar, S. A. Silling, M. Zimmermann, R. Abeyaratne

United States Department of Energy: Publications

The deformation of an infinite bar subjected to a self-equilibrated load distribution is investigated using the peridynamic formulation of elasticity theory. The peridynamic theory differs from the classical theory and other nonlocal theories in that it does not involve spatial derivatives of the displacement field. The bar problem is formulated as a linear Fredholm integral equation and solved using Fourier transform methods. The solution is shown to exhibit, in general, features that are not found in the classical result. Among these are decaying oscillations in the displacement field and progressively weakening discontinuities that propagate outside of the loading region. These …

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Heterogeneous Electron-Transfer Kinetics With Synchrotron 57fe Mossbauer Spectroscopy, J. E. Amonette, Ravi K. Kukkadapu, E. E. Alp, W. Sturhahn, T. S. Toellner Jan 2003

Heterogeneous Electron-Transfer Kinetics With Synchrotron 57fe Mossbauer Spectroscopy, J. E. Amonette, Ravi K. Kukkadapu, E. E. Alp, W. Sturhahn, T. S. Toellner

United States Department of Energy: Publications

In the first known kinetic application of the technique, synchrotron 57Fe-Mössbauer spectroscopy was used to follow the rate of heterogeneous electron transfer between aqueous reagents and a solid phase containing Fe. The solid, a synthetic 57Fe-enriched Fe (III)-bearing pyroaurite-like phase having terephthalate (TA) in the interlayer [Mg3Fe (OH)8(TA)0.5 • 2H2O], was reduced by Na2S2O4 and then reoxidized by K2Cr2O7 by means of a novel flow-through cell. Synchrotron Mössbauer spectra were collected in the time domain at 30-s intervals. Integration of the …

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Adaptive Harvest Management: 2003 Duck Hunting Season Jan 2003

Adaptive Harvest Management: 2003 Duck Hunting Season

United States Fish and Wildlife Service: Publications

The process of setting waterfowl hunting regulations is conducted annually in the United States (Blohm 1989). This process involves a number of meetings where the status of waterfowl is reviewed by the agencies responsible for setting hunting regulations. In addition, the U.S. Fish and Wildlife Service (USFWS) publishes proposed regulations in the Federal Register to allow public comment. This document is part of a series of reports intended to support development of harvest regulations for the 2003 hunting season. Specifically, this report is intended to provide waterfowl managers and the public with information about the use of adaptive harvest management …

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American Woodcock Population Status, 2003, James R. Kelley Jr. Jan 2003

American Woodcock Population Status, 2003, James R. Kelley Jr.

United States Fish and Wildlife Service: Publications

Singing-ground and Wing-collection surveys were conducted to assess the population status of the American woodcock (Scolopax minor). Singing-ground Survey data indicated that the number of displaying woodcock in the Eastern and Central Regions were unchanged from 2002 (P>0.1), although the point estimates of the trends were positive. Trends from the Singing-ground Survey during 1993-03 were –1.3 and –1.6% per year for the Eastern and Central regions, respectively (P<0.05). There were long-term (1968-03) declines (P<0.01) of 2.3% per year in the Eastern Region and 1.8% per year in the Central Region. The 2002 recruitment index for the Eastern Region (1.4 immatures per adult female) was the same as the 2001 index, but was 18% below the long-term regional average. The 2002 recruitment index for the Central Region (1.6 immatures per adult female) was 17% higher than the 2001 index (1.3 immatures per adult female), and was similar to the long-term regional average. The index of daily hunting success in the Eastern Region increased slightly from 1.8 woodcock per successful hunt in 2001 to 1.9 in 2002, but seasonal hunting success declined from 6.9 woodcock per successful hunter in 2001 to 6.6 in 2002. In the Central Region, the daily success index was 2.1 woodcock per successful hunt in 2001 and 2002; but seasonal hunting success increased from 10.0 woodcock per successful hunter in 2001 to 11.0 in 2002.

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Groundwater Flow Andwater Quality – A Flowpath Study In The Seminolewell Field, Cedar Rapids, Iowa, Douglas J. Schnoebelen, Michael J. Turco, John D. North Jan 2003

Groundwater Flow Andwater Quality – A Flowpath Study In The Seminolewell Field, Cedar Rapids, Iowa, Douglas J. Schnoebelen, Michael J. Turco, John D. North

United States Geological Survey: Staff Publications

In Iowa, alluvial aquifers near major rivers are a source of water for many communities. The City of Cedar Rapids withdraws water from wells completed in the Cedar River alluvium, a shallow alluvial aquifer adjacent to the Cedar River. The City of Cedar Rapids is located within Linn County in east-central Iowa, and water for the City is supplied by four well fields (East, Northwest, Seminole, and West well fields) along the Cedar River. The City has a population of about 121,000, and several large industries are major water users. Currently, per capita water usage in the City is nearly …

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Herbicide Loading To Shallow Ground Water Beneath Nebraska’S Management Systems Evaluation Area, Roy F. Spalding, Darrell G. Watts, Daniel D. Snow, David A. Cassada, Mary E. Exner, James S. Schepers Jan 2003

Herbicide Loading To Shallow Ground Water Beneath Nebraska’S Management Systems Evaluation Area, Roy F. Spalding, Darrell G. Watts, Daniel D. Snow, David A. Cassada, Mary E. Exner, James S. Schepers

Nebraska Water Center: Faculty Publications

Better management practices can counter deterioration of ground water quality. From 1991 through 1996 the influence of improved irrigation practices on ground water pesticide contamination was assessed at the Nebraska Management SystemsEvaluation Area. Three 13.4-ha corn (Zea mays L.) fields were studied: a conventional furrow-irrigated field, a surge-irrigated field and a center pivot–irrigated field, and a center pivot–irrigated alfalfa (Medicago sativa L.) field. The corn fields received one identical banded application of Bicep (atrazine [6-chloro-N-ethyl-N’-(1-methylethyl)-1,3,5-triazine-2,4,-diamine] _ metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl) acetamide]) annually; the alfalfa field was untreated. Ground water samples were collected …

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Herbicides In Ground Water Beneath Nebraska’S Management Systems Evaluation Area, Roy F. Spalding, Mary E. Exner, Daniel D. Snow, David A. Cassada, Mark E. Burbach, Stephen J. Monson Jan 2003

Herbicides In Ground Water Beneath Nebraska’S Management Systems Evaluation Area, Roy F. Spalding, Mary E. Exner, Daniel D. Snow, David A. Cassada, Mark E. Burbach, Stephen J. Monson

Nebraska Water Center: Faculty Publications

Profiles of ground water pesticide concentrations beneath the Nebraska Management Systems Evaluation Area (MSEA) describe the effect of 20 years of pesticide usage on ground water in the central Platte Valley of Nebraska. During the 6-yr (1991–1996) study, 14 pesticides and their transformation products were detected in 7848 ground water samples from the unconfined water table aquifer. Triazine and acetamide herbicides applied on the site and their transformation products had the highest frequencies of detection. Atrazine [6-chloro-N-ethyl-N’-(1-methylethyl)-1,3,5-triazine-2,4,-diamine] concentrations decreased with depth and ground water age determined with 3H/3He dating techniques. Assuming equivalent atrazine …

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Master Of Science Degree Programs 2003-2005, Nova Southeastern University Jan 2003

Master Of Science Degree Programs 2003-2005, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

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Graduate School Of Computer And Information Sciences 2003, Nova Southeastern University Jan 2003

Graduate School Of Computer And Information Sciences 2003, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

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Stochastic Modeling Of Nonlinear Epidemiology, Sankar Bokka Jan 2003

Stochastic Modeling Of Nonlinear Epidemiology, Sankar Bokka

Electronic Theses and Dissertations

No abstract provided.

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Kerr-Resonance-Condition-Coupled Enhancement In Magneto-Optic Media, A. De, A. Puri Jan 2003

Kerr-Resonance-Condition-Coupled Enhancement In Magneto-Optic Media, A. De, A. Puri

Physics Faculty Publications

We derive an expression for cyclotron frequency ωc, which sets Re[ϵ+ϵ−]=1 in a magneto-optic (MO) substrate, at any incident photon energy. Thereby, at any desired part of the optical spectrum, large Kerr effects can be obtained, which are generally known to occur either at the free-charge-carrier-plasma-resonance frequency ωp, or at frequencies where active electronic transitions take place. Under these conditions, ωp is seen to play a very different role; it is seen that for any ω, the magnitude of the Kerr resonance in a single MO (InSb here) substrate increases …

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Ultrafine Nife2o4 Powder Fabricated From Reverse Microemulsion Process, Jiye Fang, Narayan Shama, Le Duc Tung, Eun Young Shin, Charles J. O'Connor, Kevin L. Stokes, Gabriel Caruntu, John B. Wiley, Leonard Spinu, Jinke Tang Jan 2003

Ultrafine Nife2o4 Powder Fabricated From Reverse Microemulsion Process, Jiye Fang, Narayan Shama, Le Duc Tung, Eun Young Shin, Charles J. O'Connor, Kevin L. Stokes, Gabriel Caruntu, John B. Wiley, Leonard Spinu, Jinke Tang

Physics Faculty Publications

NiFe2O4 ultrafine powder with high crystallinity has been prepared through a reverse microemulsion route. The composition in starting solution was optimized, and the resulting NiFe2O4 was formed at temperature of around 550–600 °C, which is much lower than that observed from the solid-state reaction. Magnetic investigation indicates that samples are soft-magnetic materials with low coercivity and with the saturation magnetization close to the bulk value of Ni ferrite.

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Multivariate Slash And Skew-Slash Distributions / By Fei Tan, Fei Tan Jan 2003

Multivariate Slash And Skew-Slash Distributions / By Fei Tan, Fei Tan

Electronic Theses and Dissertations

No abstract provided.

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Intersecting Set Systems, Jaromy Scott Kuhl Jan 2003

Intersecting Set Systems, Jaromy Scott Kuhl

Electronic Theses and Dissertations

No abstract provided.

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Time-Resolved, Low-Dimensional Estimation Of Open Cavity Flow, Nathan E. Murray Jan 2003

Time-Resolved, Low-Dimensional Estimation Of Open Cavity Flow, Nathan E. Murray

Electronic Theses and Dissertations

No abstract provided.

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A Comparison Of Lowess Normalization Methods On Microarray Data, Yuanyuan Ding Jan 2003

A Comparison Of Lowess Normalization Methods On Microarray Data, Yuanyuan Ding

Electronic Theses and Dissertations

No abstract provided.

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An Impedance Tube Investigation Of Thermoacoustics With A Multi-Phase Working Fluid, Daniel C. Brown Jan 2003

An Impedance Tube Investigation Of Thermoacoustics With A Multi-Phase Working Fluid, Daniel C. Brown

Electronic Theses and Dissertations

No abstract provided.

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Application Of Inductive Inference To Models With Additive Exponential Terms, Chung Yong Chan Jan 2003

Application Of Inductive Inference To Models With Additive Exponential Terms, Chung Yong Chan

Electronic Theses and Dissertations

No abstract provided.

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Separate Schools Shall Be Maintained For The White And Colored Races : The Progression Of Historically Black Colleges And Universities In Mississippi, Kianca Latrelle Guyton Jan 2003

Separate Schools Shall Be Maintained For The White And Colored Races : The Progression Of Historically Black Colleges And Universities In Mississippi, Kianca Latrelle Guyton

Electronic Theses and Dissertations

No abstract provided.

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The Value Of Giving Away Secrets, Oren Bar-Gill, Gideon Parchomovsky Jan 2003

The Value Of Giving Away Secrets, Oren Bar-Gill, Gideon Parchomovsky

Faculty Articles

This Essay demonstrates the strategic advantage of narrow patents and unprotected publication of R&D output. Broad patents might stifle follow-on improvements by deterring potential cumulative innovators, who fear being held up by the initial inventor at the ex post licensing stage. By opting for a narrower patent and unprotected publication, the initial patent holder commits not to hold up follow-on inventors, thus promoting sequential innovation and generating lucrative licensing fees. Counterintuitively, in cumulative innovation settings, less protection benefits the patentee. This finding may serve as a counter-force to the much-lamented "anti-commons" problem. More generally, our theory demonstrates that the divergence …

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Theoretical Model For Chromatography With Dynamically-Related Stationary Phases / By Yuan Xiong, Yuan Xiong Jan 2003

Theoretical Model For Chromatography With Dynamically-Related Stationary Phases / By Yuan Xiong, Yuan Xiong

Electronic Theses and Dissertations

No abstract provided.

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Application Of Pressure Sensitive Paint To Evaluate Loads On Jet Blast Deflectors / By Kiran K. Konde, Kiran K. Konde Jan 2003

Application Of Pressure Sensitive Paint To Evaluate Loads On Jet Blast Deflectors / By Kiran K. Konde, Kiran K. Konde

Electronic Theses and Dissertations

No abstract provided.

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Electronic Cooling Of A Generic Transmitter, Jaideep Bangal Jan 2003

Electronic Cooling Of A Generic Transmitter, Jaideep Bangal

Electronic Theses and Dissertations

No abstract provided.

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A Fractal Analysis Of Estrogen, Estrogen-Receptor Interactions And Estrogen Metabolism In Two Related Species Of Catfish, Harshala D. Butala Jan 2003

A Fractal Analysis Of Estrogen, Estrogen-Receptor Interactions And Estrogen Metabolism In Two Related Species Of Catfish, Harshala D. Butala

Electronic Theses and Dissertations

No abstract provided.

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A Good Start To Numeracy : Effective Numeracy Strategies From Research And Practice In Early Childhood, Brian Doig, Barry Mcrae, Ken Rowe Jan 2003

A Good Start To Numeracy : Effective Numeracy Strategies From Research And Practice In Early Childhood, Brian Doig, Barry Mcrae, Ken Rowe

Student learning processes

The Commonwealth-funded Project Good Start was a longitudinal study of children during their year before school and the first year of school, involving preschool centres and schools across Australia. It considered the questions: how can effective numeracy programs be identified at both year-before-school and the early years of school; and what constitutes evidence of effectiveness. This report provides a review of the international and Australian research literature on numeracy in early childhood that complements the Department of Education, Science and Training’s major review of the numeracy literature undertaken by Deakin University. It is designed to provide early childhood professionals and …

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Retirement And High Level Human Capital, Irving Gershenberg Jan 2003

Retirement And High Level Human Capital, Irving Gershenberg

Gerontology Institute Publications

Given that demographic trends in economically advanced industrial countries such as our own continue to shift toward increasingly older, formally retired populations, we need to find ways to keep more of this older retired population productive. Economists and others differ in their estimation regarding the ability and/or willingness on part of the retired to retain, let alone utilize the know-how, the human capital accumulated prior to retirement. This is as true for those who have spent their work life engaged in producing and communicating new ideas and synthesizing and diffusing what is known, those who have accumulated what I term …

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Remote Sensing Modeling Of Land Surface Temperature, Jiansheng Yang Jan 2003

Remote Sensing Modeling Of Land Surface Temperature, Jiansheng Yang

Open Access Dissertations

This study addresses the fundamental science question of modeling land surface temperature (LST) by combining the field experiment, spatial interpolation, and satellite thermal infrared (TIR) remote sensing. Specific objectives of this study are to: (1) calibrate the spatial interpolation of LST using satellite-derived surface emissivity; (2) calibrate the conversion from at-satellite brightness temperature to LST using surface variables; and (3) simulate and predict the air temperature profiles in a forest canopy using field observations and satellite TIR data. To this end, Landsat Enhanced Thematic Mapper Plus (ETM+) TIR data were applied to derive surface emissivity and brightness temperature. Hourly temperature …

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The Zigzag Path Of A Pseudo-Triangulation, Oswin Aichholzer, Günter Rote, Bettina Speckmann, Ileana Streinu Jan 2003

The Zigzag Path Of A Pseudo-Triangulation, Oswin Aichholzer, Günter Rote, Bettina Speckmann, Ileana Streinu

Computer Science: Faculty Publications

We define the zigzag path of a pseudo-triangulation, a concept generalizing the path of a triangulation of a point set. The pseudotriangulation zigzag path allows us to use divide-and-conquer type of approaches for suitable (i.e., decomposable) problems on pseudo-triangulations. For this we provide an algorithm that enumerates all pseudotriangulation zigzag paths (of all pseudo-triangulations of a given point set with respect to a given line) in O(n2) time per path and O(n2) space, where n is the number of points. We illustrate applications of our scheme which include a novel algorithm to count the number of pseudotriangulations of a point …

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Computational Geometry Column 44, Joseph O'Rourke Jan 2003

Computational Geometry Column 44, Joseph O'Rourke

Computer Science: Faculty Publications

The open problem of whether or not every pair of equal-area polygons has a hinged dissection is discussed.

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The Foldings Of A Square To Convex Polyhedra, Rebecca Alexander, Heather Dyson, Joseph O'Rourke Jan 2003

The Foldings Of A Square To Convex Polyhedra, Rebecca Alexander, Heather Dyson, Joseph O'Rourke

Computer Science: Faculty Publications

The structure of the set of all convex polyhedra foldable from a square is detailed. It is proved that five combinatorially distinct nondegenerate polyhedra, and four different flat polyhedra, are realizable. All the polyhedra are continuously deformable into each other, with the space of polyhedra having the topology of four connected rings.

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