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2003

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Analytical Model Of A Thermomechanical Hot Channel Coupled To A Friction Stir Welding Process, Saptarshi Mandal Jul 2003

Analytical Model Of A Thermomechanical Hot Channel Coupled To A Friction Stir Welding Process, Saptarshi Mandal

Mechanical & Aerospace Engineering Theses & Dissertations

Although fusion welding techniques are well established, recent developments in solid state joining techniques have produced high quality welds in materials that are difficult to fusion weld. Friction Stir Welding (FSW) was developed in 1991 as a robust solid-state joining technique that uses a specially shaped rotating tool to generate heat and plasticize material around the tool. The tool then mixes plasticized material along the joint line to produce the weld. Over the last decade, FSW has become increasingly popular for welding aluminum. The combination of attractive properties of the weld and cost-efficiency has led researchers to investigate the feasibility …

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A Numerical Analysis Of A Non-Porous, Flexible Upper Airfoil Surface, Asao Omura Jul 2003

A Numerical Analysis Of A Non-Porous, Flexible Upper Airfoil Surface, Asao Omura

Mechanical & Aerospace Engineering Theses & Dissertations

The aerodynamic behavior of the early Wright brothers' airfoils is an important element of the history of aeronautics. Their fabric-covered wings were not constrained to maintain the airfoil shape of their wooden rib substructures and therefore differences in performance between rigid and flexible Wright airfoil shapes can be expected. The purpose of this thesis was to develop a systematic numerical approach that allows an assessment of the influence of the fabric on the overall aerodynamic behavior of the Wright Model B airfoil. The Model B airfoil was chosen because it is the earliest "production" airfoil and has sufficient documentation to …

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Foreword: The Political Geography Of Race Data In The Criminal Justice System, Andrew E. Taslitz Jul 2003

Foreword: The Political Geography Of Race Data In The Criminal Justice System, Andrew E. Taslitz

Law and Contemporary Problems

Several months ago, there was a heated discussion on CrimProf, the listserv for criminal law professors, about the disproportionate representation of minorities in the criminal justice system. Few participants in this online discussion contested the reality that racial and ethnic minorities, especially African Americans, make up a far larger percentage of those arrested and incarcerated than should be expected from their percentage of the country's total population.

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Design Of A Multiband Internal Antenna For Third Generation Mobile Phone Handsets, Mohammod Ali, Gerard James Hayes, Huan-Sheng Hwang, Robert A. Sadler Jul 2003

Design Of A Multiband Internal Antenna For Third Generation Mobile Phone Handsets, Mohammod Ali, Gerard James Hayes, Huan-Sheng Hwang, Robert A. Sadler

Faculty Publications

A multiband internal antenna is introduced. The antenna consists of a driven meander-line element and two parasitic elements. The design is particularly unique since it supports the third generation mobile phone handsets where multiband operation is greatly desired. The proposed antenna operates effectively in the aMPS 800 (824-894 MHz), GSM 900 (880-960 MHz), and GSM 1900 (1850-1990 MHz) bands within 2.5:1 (voltage standing wave ratio (VSWR). Detail design criteria with respect to geometrical parameter variation are given. Experimental data (VSWR and pattern) obtained from a laboratory prototype are also presented.

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Design And Testing Of Spacecraft Power Systems Using Vtb, Zhenhua Jiang, Shengyi Liu, Roger A. Dougal Jul 2003

Design And Testing Of Spacecraft Power Systems Using Vtb, Zhenhua Jiang, Shengyi Liu, Roger A. Dougal

Faculty Publications

A study is presented on the design and testing of spacecraft power systems using the virtual test bed (VTB). The interdisciplinary components such as solar array and battery systems were first modeled in native VTB format and validated by experiment data. The shunt regulator and battery charge controller were designed in Simulink according to the system requirements and imported to VTB. Two spacecraft power systems were then designed and tested together with the control systems.

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The Interregional Impact Of Fiscal Decentralization In Indonesia: Inter Regional Social Accounting Matrix Model, Satria Utama, Bambang P. S. Brodjonegoro Jul 2003

The Interregional Impact Of Fiscal Decentralization In Indonesia: Inter Regional Social Accounting Matrix Model, Satria Utama, Bambang P. S. Brodjonegoro

Jurnal Ekonomi dan Pembangunan Indonesia

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3.0 Academic Policies And Services, Saint Mary's College Of California Jul 2003

3.0 Academic Policies And Services, Saint Mary's College Of California

Faculty Handbook

No abstract provided.

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ข่าว&กิจกรรมสิ่งแวดล้อม Jul 2003

ข่าว&กิจกรรมสิ่งแวดล้อม

Thai Environment

No abstract provided.

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ข้อเท็จจริงเกี่ยวกับน้ำ, สุรเชษฐ์ พิทยาพิบูลพงษ์ Jul 2003

ข้อเท็จจริงเกี่ยวกับน้ำ, สุรเชษฐ์ พิทยาพิบูลพงษ์

Thai Environment

No abstract provided.

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Is The World Evolving Discretely?, Saber Elaydi Jul 2003

Is The World Evolving Discretely?, Saber Elaydi

Mathematics Faculty Research

No abstract provided.

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Random Walks, Non-Cooperation Games, And The Complex Mathematics Of Patent Pricing, F. Russell Denton, Paul J. Heald Jul 2003

Random Walks, Non-Cooperation Games, And The Complex Mathematics Of Patent Pricing, F. Russell Denton, Paul J. Heald

Scholarly Works

Current patent valuation methods have been described charitably as “inappropriate,” “crude,” “inherently unreliable,” and a “guesstimate.” This article provides a more rational and systematic tool than any we have found in the existing literature or relevant case law. We believe our approach to patent valuation will be useful in improving investment decisions, in facilitating licensing negotiations, and in reducing error costs in litigation. An improved valuation metric also promises to make patents easier to take as collateral and to reduce the amount of “Blue Sky” in mergers and acquisitions involving high tech corporations. To the extent that valuation problems have …

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Applicability Of Risk-Based Management And The Need For Risk-Based Economic Decision Analysis At Hazardous Waste Contaminated Sites, I. Khadam, Jagath J. Kaluarachchi Jul 2003

Applicability Of Risk-Based Management And The Need For Risk-Based Economic Decision Analysis At Hazardous Waste Contaminated Sites, I. Khadam, Jagath J. Kaluarachchi

Civil and Environmental Engineering Faculty Publications

Decision analysis in subsurface contamination management is generally carried out through a traditional engineering economic viewpoint. However, new advances in human health risk assessment, namely, the probabilistic risk assessment, and the growing awareness of the importance of soft data in the decision-making process, require decision analysis methodologies that are capable of accommodating non-technical and politically biased qualitative information. In this work, we discuss the major limitations of the currently practiced decision analysis framework, which evolves around the definition of risk and cost of risk, and its poor ability to communicate risk-related information. A demonstration using a numerical example was conducted …

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Integrating Multiple 3d Views Through Frame-Of-Reference Interaction, Matthew D. Plumlee, Colin Ware Jul 2003

Integrating Multiple 3d Views Through Frame-Of-Reference Interaction, Matthew D. Plumlee, Colin Ware

Center for Coastal and Ocean Mapping

Frame-of-reference interaction consists of a unified set of 3D interaction techniques for exploratory navigation of large virtual spaces in nonimmersive environments. It is based on a conceptual framework that considers navigation from a cognitive perspective, as a way of facilitating changes in user attention from one reference frame to another, rather than from the mechanical perspective of moving a camera between different points of interest. All of our techniques link multiple frames of reference in some meaningful way. Some techniques link multiple windows within a zooming environment while others allow seamless changes of user focus between static objects, moving objects, …

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When Is A Principal Charged With An Agent’S Knowledge?, Deborah A. Demott Jul 2003

When Is A Principal Charged With An Agent’S Knowledge?, Deborah A. Demott

Duke Journal of Comparative & International Law

No abstract provided.

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Study Of Geometric Effects On Local Corrosion Rates For Lbe Loop, Chao Wu Jul 2003

Study Of Geometric Effects On Local Corrosion Rates For Lbe Loop, Chao Wu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Corrosion is an extremely important issue in nuclear cooling system applications. Many scientific and engineering efforts have been contributed to the research of finding an ideal material, which has resistance to corrosive Lead Bismuth Eutectic (LBE). A Delta Loop was designed and constructed in Los Alamos National Lab (LANL) to obtain the experimental data. This loop is a multi-section closed system that differs in diameter from one part to another. As a result, an intensive study on the geometry effect is hence necessary and valuable. In this thesis, this problem was simulated by commercial software STAR-CD. Results provide a good …

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A Forward-Backward Fluence Model For The Low-Energy Neutron Boltzmann Equation, Gary Alan Feldman Jul 2003

A Forward-Backward Fluence Model For The Low-Energy Neutron Boltzmann Equation, Gary Alan Feldman

Mathematics & Statistics Theses & Dissertations

In this research work, the neutron Boltzmann equation was separated into two coupled integro-differential equations describing forward and backward neutron fluence in selected materials. Linear B-splines were used to change the integro-differential equations into a coupled system of ordinary differential equations (O.D.E.'s). Difference approximations were then used to recast the O.D.E.'s into a coupled system of linear equations that were solved for forward and backward neutron fluences. Adding forward and backward fluences gave the total fluence at selected energies and depths in the material. Neutron fluences were computed in single material shields and in a shield followed by a target …

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Nucleon-Nucleon Spin Dependent Scattering Amplitudes To Describe Final State Interactions In Electromagnetic And Electroweak Nuclear Processes, William P. Ford Jul 2003

Nucleon-Nucleon Spin Dependent Scattering Amplitudes To Describe Final State Interactions In Electromagnetic And Electroweak Nuclear Processes, William P. Ford

Physics Theses & Dissertations

There are currently no models readily available that provide nucleon-nucleon spin dependent scattering amplitudes at high energies ( s ≥ 6 GeV2). This work aims to provide a model for calculating these high-energy scattering amplitudes. The foundation of the model is Regge theory since it allows for a relativistic description and full spin dependence. A parameterization of the amplitudes is presented. and comparisons of the solution to the assembled data set are shown. In addition, an application of the model to describe final state interactions in deuteron electrodisintegration is presented. Overall the model works as intended, and provides …

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Illinois State Alumni Magazine, Summer 2003, Illinois State University, University Marketing And Communications Jul 2003

Illinois State Alumni Magazine, Summer 2003, Illinois State University, University Marketing And Communications

State: The Magazine of Illinois State University (1999-present)

Illinois State University alumni magazine

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Analytical Ise Calculation And Optimum Control System Design, Tony Kealy, Aidan O'Dwyer Jul 2003

Analytical Ise Calculation And Optimum Control System Design, Tony Kealy, Aidan O'Dwyer

Conference papers

Abstract – In control system theory, a performance index is a quantitative measure of the performance of a system and is chosen so that emphasis is given to the important system parameters. In this paper, the authors demonstrate two methods to determine analytically the Integral of the Square of the Error (ISE) performance index value for a first-order-plus-dead-time (FOPDT) process model under PI control. The ability of proportional/integral (PI) and proportional/integral/derivative (PID) controllers to compensate most practical industrial processes has led to their wide acceptance in industrial applications. The most direct way to set up PI/PID controller parameters is the …

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On-Road Remote Sensing Of Automobile Emissions In The Denver Area: Year 4, January 2003, Daniel A. Burgard, Gary A. Bishop, Mitchell J. Williams, Donald H. Stedman Jul 2003

On-Road Remote Sensing Of Automobile Emissions In The Denver Area: Year 4, January 2003, Daniel A. Burgard, Gary A. Bishop, Mitchell J. Williams, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

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Expressions For Evaluating The Possibility Of Slip At The Liquid-Solid Interface In Open Tube Capillary Electrochromatography, B. A. Grimes, Athanasios I. Liapis Jul 2003

Expressions For Evaluating The Possibility Of Slip At The Liquid-Solid Interface In Open Tube Capillary Electrochromatography, B. A. Grimes, Athanasios I. Liapis

Chemical and Biochemical Engineering Faculty Research & Creative Works

In this work, expressions are constructed and solved that describe the velocity field of electroosmotic flow (EOF) in open tube capillary electrochromatography (CEC) systems when the possibility of having unequal tangential velocities at the liquid-solid interface is considered and a slip condition is employed as a boundary condition for the velocity of the EOF at the capillary wall. the coupled equations of hydrodynamics (momentum balance equation) and electrostatics (Poisson equation) are solved numerically in order to obtain the distribution of the velocity field as well as the value of the volumetric flow rate in the open tube. Also, expressions for …

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Extrapolation Of The Zα-Expansion And Two-Loop Bound-State Energy Shifts, Ulrich D. Jentschura Jul 2003

Extrapolation Of The Zα-Expansion And Two-Loop Bound-State Energy Shifts, Ulrich D. Jentschura

Physics Faculty Research & Creative Works

Quantum electrodynamic (QED) effects that shift the binding energies of hydrogenic energy levels have been expressed in terms of a semi-analytic expansion in powers of Zα and ln[(Zα)-2], where Z is the nuclear charge number and α is the fine-structure constant. For many QED effects, numerical data are available in the domain of high Z where the Zα expansion fails. In this Letter, we demonstrate that it is possible, within certain limits of accuracy, to extrapolate the Zα-expansion from the low-Z to the high-Z domain. We also review two-loop self-energy effects and provide an estimate for the problematic …

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Charge Transfer In Slow Collisions Of H⁺ With Na, Anh-Thu Le, Chen-Nan Liu, C. D. Lin Jul 2003

Charge Transfer In Slow Collisions Of H⁺ With Na, Anh-Thu Le, Chen-Nan Liu, C. D. Lin

Physics Faculty Research & Creative Works

We reexamined charge-transfer cross sections for protons colliding with Na(3s) atoms for collision energies from the threshold at 1.7 eV to 40 eV using the recently developed hyperspherical close-coupling method. Our results disagree with the recent calculations by Dutta et al. [Phys. Rev. A 63, 022709 (2001)], but are in good agreement with the earlier calculations of Croft and Dickinson [J. Phys. B 29, 57 (1996)] except at energies below 3 eV. Our calculations support the doubt on the experimental data of Kushawaha.

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What Has Luck Got To Do With Economic Development? An Interpretation Of Resurgent Asia's Growth Experience, Hing-Man Leung, Swee Liang Tan, Zhenlin Yang Jul 2003

What Has Luck Got To Do With Economic Development? An Interpretation Of Resurgent Asia's Growth Experience, Hing-Man Leung, Swee Liang Tan, Zhenlin Yang

Research Collection School Of Economics

This paper critically reexamines the belief, currently gathering strength in the literature, that economic development depends on good luck rather than on good policy, and that Prometheus is “unchained by chance”. While it is impossible to disprove the role of luck in growth, we argue that luck is endogenous, and good luck is a function of good policy. Luck favours those who strive. Again contrary to common belief, we show that resurgent Asian economies have endured more, not less, than their fair share of economic volatility. They learned their lessons by success and failures, and luck is endogenous through learning-by-investing.

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Effects Of Ultrasonic Scaling And Hand-Activated Scaling On Tactile Sensitivity In Dental Hygiene Students, Danielle Leigh Ryan Jul 2003

Effects Of Ultrasonic Scaling And Hand-Activated Scaling On Tactile Sensitivity In Dental Hygiene Students, Danielle Leigh Ryan

Dental Hygiene Theses & Dissertations

This study was conducted in order to determine if tactile sensitivity varies in dental hygiene students who use the ultrasonic scaler as compared to those who scale with handactivated instruments. A convenience sample of 40 consenting, first year dental hygiene students were randomly assigned to one of two groups. The 40 students had not yet used the ultrasonic scaler nor had any history of injuries or disabilities to the dominant arm, wrist or hand. After establishing a baseline tactile sensitivity score with the Vibratory Sensory Analyzer (VSA), experimental group subjects used the ultrasonic scaler to remove 4cc's of artificial calculus …

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Comment On: 'Depolarization Corrections To The Coercive Field In Thin-Film Ferroelectrics', Stephen Ducharme, Vladimir Fridkin Jul 2003

Comment On: 'Depolarization Corrections To The Coercive Field In Thin-Film Ferroelectrics', Stephen Ducharme, Vladimir Fridkin

Stephen Ducharme Publications

The Letter by Dawber et al. [J. Phys.: Condens. Matter 15 L393 (2003)] notes that incomplete screening in the electrodes of a ferroelectric capacitor can result in an underestimate for the true coercive field in films of nanometer thickness. We show that their estimate of the magnitude of this correction it too large in the case of ferroelectric copolymer Langmuir- Blodgett films and, as a result, invalidates the claim that finite-size scaling of the ferroelectric coercive field is evident in films thinner than 15 nm.

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Direct Analysis Of Plasticizers In Aqueous Samples By Atomspheric Pressure Chemical Ionization-Tandem Mass Spectrometry (Apci-Ms-Ms, Bruce A. Kimball, Thomas M. Primus, John J. Johnston Jul 2003

Direct Analysis Of Plasticizers In Aqueous Samples By Atomspheric Pressure Chemical Ionization-Tandem Mass Spectrometry (Apci-Ms-Ms, Bruce A. Kimball, Thomas M. Primus, John J. Johnston

United States Department of Agriculture Wildlife Services: Staff Publications

The widespread manufacture of plastics requires the similarly ubiquitous use of plasticizers. Plasticizers such as bis(2-ethylhexyl) adipate (DOA) and bis(2-ethylhexyl) phthalate (DOP) enhance polymer strength and flexibility and are found in polymeric products such as cosmetics, detergents, and building and storage products (1). However, these additives are not bound to the polymer matrix and are subject to leaching. A recent Health Canada report warned that DOP may leach from medical devices and cause harm to infants, young boys, pregnant women, and nursing mothers (2). The United States Environmental Protection Agency (US. EPA) estimates that over 450,000 pounds of DOA were …

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Population Monitoring In Support Of A Rabies Vaccination Program For Skunks In Arizona, Richard M. Engeman, Kevin L. Christensen, Michael J. Pipas, David L. Bergman Jul 2003

Population Monitoring In Support Of A Rabies Vaccination Program For Skunks In Arizona, Richard M. Engeman, Kevin L. Christensen, Michael J. Pipas, David L. Bergman

United States Department of Agriculture Wildlife Services: Staff Publications

Three population monitoring methods were evaluated in support of a trap/vaccinate/release program for controlling a bat variant of rabies virus in skunks (Mephitis mephitis) in Flagstaff, Arizona (USA). Skunks were the primary species targeted for population monitoring during the program, but feral cats were also monitored as they represented an abundant secondary vector species capable of rabies transmission. Skunks were vaccinated and released, except for a subset tested for rabies. All captured cats were placed in the local animal shelter. Spotlight surveys essentially did not detect skunks, and were not able to detect reductions in the cat population. …

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Fencing Out Big Game Species, Dale L. Nolte Jul 2003

Fencing Out Big Game Species, Dale L. Nolte

United States Department of Agriculture Wildlife Services: Staff Publications

Fencing is the most effective approach to deter big-game movements. However, cost to install and maintain effective fences can be prohibitive. Further, fences across rough terrain can be impractical. Although simple designs can effectively deter deer and elk from some sites, more complex designs are necessary if the protected resource is highly desirable or if normal transitory patterns, such as migratory routes or paths to water, are disrupted. The task becomes more daunting if your desire is to construct an impregnable fence.

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Bears Prefer Trees In The Spring, Dale L. Nolte Jul 2003

Bears Prefer Trees In The Spring, Dale L. Nolte

United States Department of Agriculture Wildlife Services: Staff Publications

As they emerge from their winter den, bears need an energy source and food is relatively scarce. Concurrently, trees are breaking dormancy and starting to generate carbohydrates. Consequently, bears commonly girdle Douglas-fir trees during the spring to feed on the available carbohydrates. Bears strip bark from a tree with their claws, then feed on the sapwood by scraping it from the heartwood with their teeth. Scattered remnants of bark strewn at the base of a tree and vertical tooth marks are characteristic indicators of bear activity. Most frequently bears forage on the lower bole of trees, girdling the bottom three …

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