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open access

An 8-Step Program: Shaping and Fixed-Time Food Delivery Effects on Several Approximations and Undesired Responses in Goats.

Description: This study investigated the effects of a shaping program for halter training across 8 steps in the program and 4 trial-terminating, or "undesirable," responses. Three La Mancha goats (Capra hircus) located at the Frank Buck Zoo in Gainesville, Texas were used for the study. A fixed-time 15 s (FT-15 s) was used during the baseline conditions, to examine the effects of response contingent and response-independent food deliveries, as well as to examine what preliminary steps might not necessarily … more
Date: May 2003
Creator: Fernandez, Eduardo J.
Partner: UNT Libraries
open access

A 201 MHz RF cavity design with non-stressed pre-curved Be windows for muon cooling channels

Description: We present a 201-MHz RF cavity design for muon cooling channels with non-stressed and pre-curved Be foils to terminate the beam apertures. The Be foils are necessary to improve the cavity shunt impedance with large beam apertures needed for accommodating large transverse size muon beams. Be is a low-Z material with good electrical and thermal properties. It presents an almost transparent window to muon beams, but terminates the RF cavity electro-magnetically. Previous designs use pre-stressed f… more
Date: May 1, 2003
Creator: Li, Derun; Ladran, A.; Staples, J.; Virostek, S.; Zisman, M.; Lau, W. et al.
Partner: UNT Libraries Government Documents Department
open access

An Abstract Description Approach to the Discovery and Classification of Bioinformatics Web Sources

Description: The World Wide Web provides an incredible resource to genomics researchers in the form of dynamic data sources--e.g. BLAST sequence homology search interfaces. The growth rate of these sources outpaces the speed at which they can be manually classified, meaning that the available data is not being utilized to its full potential. Existing research has not addressed the problems of automatically locating, classifying, and integrating classes of bioinformatics data sources. This paper presents an … more
Date: May 1, 2003
Creator: Rocco, D & Critchlow, T J
Partner: UNT Libraries Government Documents Department
open access

Accelerated Stress Testing of Thin-Film Modules with SnO2:F Transparent Conductors

Description: This paper reviews a testing program conducted at NREL for the past two years that applied voltage, water vapor, and light stresses to thin-film photovoltaic (PV) modules with SnO2:F transparent conducting oxides (TCOs) deposited on soda-lime glass superstrates. Electrochemical corrosion at the glass-TCO interface was observed to result in delamination of the thin-film layers. Experimental testing was directed toward accelerating the corrosion and understanding the nature of the resulting damag… more
Date: May 1, 2003
Creator: Osterwald, C. R.; McMahon, T. J.; del Cueto, J. A.; Adelstein, J. & Puett, J.
Partner: UNT Libraries Government Documents Department
open access

Accelerator Magnet Plugging By Metal Oxides: A Theoretical Investigation, Remediation, and Preliminary Results

Description: The Thomas Jefferson National Accelerator Facility has experienced magnet overheating at high power. Overheating is caused by cooling water passages becoming plugged and is a direct result of the Dean Effect deposition of corrosion products suspended in the water. Salving simplified dynamic model equations of the flow in the magnet tubing bends yielded a relationship for plugging rate as a function of particle size, concentration, velocity, channel width and bend radius. Calculated deposition r… more
Date: May 1, 2003
Creator: Rust, William W.
Partner: UNT Libraries Government Documents Department
open access

Accessing Information on the World Wide Web: Predicting Usage Based on Involvement

Description: Advice for Web designers often includes an admonition to use short, scannable, bullet-pointed text, reflecting the common belief that browsing the Web most often involves scanning rather than reading. Literature from several disciplines focuses on the myriad combinations of factors related to online reading but studies of the users' interests and motivations appear to offer a more promising avenue for understanding how users utilize information on Web pages. This study utilized the modified Per… more
Date: May 2003
Creator: Langford, James David
Partner: UNT Libraries
open access

Acculturative Processes and Their Impact on Self-Reports of Psychological Distress in Mexican-American Adolescents

Description: The current study examined the effects of acculturative processes on the self-report of behavioral problems in Hispanic children ages 11-14. Acculturation was measured by the Acculturation Rating Scale for Mexican Americans-II (ARSMA-II) (ã Sage Publications, Thousand Oaks, CA, www.sagepub.com) (Cuellar, Arnold, and Maldonado, 1995) and the self-report of behavioral symptoms was assessed using the Youth Self-Report (ã T.M. Achenbach, Burlington, VT, www.aseba.com) (Achenbach, 1991). It was hypo… more
Date: May 2003
Creator: Garrison, Lance A.
Partner: UNT Libraries
open access

ACME: Algorithms for Contact in a Multiphysics Environment API Version 1.3

Description: An effort is underway at Sandia National Laboratories to develop a library of algorithms to search for potential interactions between surfaces represented by analytic and discretized topological entities. This effort is also developing algorithms to determine forces due to these interactions for transient dynamics applications. This document describes the Application Programming Interface (API) for the ACME (Algorithms for Contact in a Multiphysics Environment) library.
Date: May 1, 2003
Creator: BROWN, KEVIN H.; VOTH, THOMAS E.; GLASS, MICHEAL W.; GULLERUD, ARNE S.; HEINSTEIN, MARTIN W. & JONES, REESE E.
Partner: UNT Libraries Government Documents Department
open access

Adhesion Strength Study of EVA Encapsulants on Glass Substrates

Description: An extensive peel-test study was conducted to investigate the various factors that may affect the adhesion strength of photovoltaic module encapsulants, primarily ethylene-vinyl acetate (EVA), on glass substrates of various laminates based on a common configuration of glass/encapsulant/backfoil. The results show that"pure" or"absolute" adhesion strength of EVA-to-glass was very difficult to obtain because of tensile deformation of the soft, semi-elastic EVA layer upon pulling. A mechanically"st… more
Date: May 1, 2003
Creator: Pern, F. J. & Glick, S. H.
Partner: UNT Libraries Government Documents Department
open access

Advanced CIGS Photovoltaic Technology: Annual Technical Report, 15 November 2001-14 November 2002

Description: Energy Photovoltaics, Inc. (EPV) has consistently pursued a vacuum-based approach to CIGS production, using novel linear-source technology and standard soda-lime glass substrates. It has also chosen to develop processing methods with worker safety in mind. These choices result in layers having controllable purity and low physical defects, and production without significant hazards. Considerations such as these are important in helping to minimize the processing costs of CIGS. Technically, thin-… more
Date: May 1, 2003
Creator: Delahoy, A. E. & Chen, L.
Partner: UNT Libraries Government Documents Department
open access

Advanced Concepts for Photovoltaic Cells

Description: Novel approaches to high efficiency photovoltaic cells are discussed that are based on the use of semiconductor quantum dots to slow hot electron cooling and thus produce either enhanced photocurrents through impact ionization or enhanced photovoltages through hot electron transport and collection.
Date: May 1, 2003
Creator: Nozik, A. J.
Partner: UNT Libraries Government Documents Department
open access

ADVANCED GAS TURBINE SYSTEMS RESEARCH PROGRAM

Description: The quarterly activities of the Advanced Gas Turbine Systems Research (AGTSR) program are described in this quarterly report. As this program administers research, we have included all program activity herein within the past quarter as dated. More specific research progress reports are provided weekly at the request of the AGTSR COR and are being sent to NETL As for the administration of this program, items worthy of note are presented in extended bullet format following the appropriate heading… more
Date: May 1, 2003
Creator: Golan, Lawrence P.
Partner: UNT Libraries Government Documents Department
open access

ADVANCED GAS TURBINE SYSTEMS RESEARCH PROGRAM

Description: The activities of the Advanced Gas Turbine Systems Research (AGTSR) program for the reporting period October 1, 2002 to December 31, 2002 are described in this quarterly report. No new membership, workshops, research projects, internships, faculty fellowships or special studies were initiated during this reporting period. Contract completion is set for June 30, 2003. During the report period, six research progress reports were received (3 final reports and 3 semi-annual reports). The University… more
Date: May 1, 2003
Creator: Golan, Lawrence P.
Partner: UNT Libraries Government Documents Department
open access

Advanced NDE Technologies for Powder Metal Components

Description: Nondestructive evaluation encompasses numerous technologies that assess materials and determine important properties. This paper demonstrates the applicability of several of these technologies to the field of powder metallurgy. The usual application of nondestructive evaluation is to detect and quantify defects in fully sintered product. But probably its most appealing role is to sense problems earlier in the manufacturing process to avoid making defects at all. Also nondestructive evaluation c… more
Date: May 1, 2003
Creator: Martin, Peter; Haskins, Jerry; Thomas, Graham & Dolan, Ken
Partner: UNT Libraries Government Documents Department
open access

ADVANCED RADIATION THEORY SUPPORT ANNUAL REPORT 2002, FINAL REPORT

Description: Z-PINCH PHYSICS RADIATION FROM WIRE ARRAYS. This report describes the theory support of DTRA's Plasma Radiation Source (PRS) program carried out by NRL's Radiation Hydrodynamics Branch (Code 6720) in FY 2002. Included is work called for in DTRA MIPR 02-2045M - ''Plasma Radiation Theory Support'' and in DOE's Interagency Agreement DE-AI03-02SF22562 - ''Spectroscopic and Plasma Theory Support for Sandia National Laboratories High Energy Density Physics Campaign''. Some of this year's work was pre… more
Date: May 1, 2003
Creator: Davis, J.; Apruzese, J; Chong, Y.; Clark, R.; Dasgupta, A.; Giuliani, J. et al.
Partner: UNT Libraries Government Documents Department
open access

Agent-Based Architecture for Web Deployment of Multi-Agents as Conversational Interfaces.

Description: Agent-based architecture explains the rationale and basis for developing agents that can interact with users through natural language query/answer patterns developed systematically using AIML (artificial intelligence mark-up language) scripts. This thesis research document also explains the architecture for VISTA (virtual interactive story-telling agents), which is used for interactive querying in educational and recreational purposes. Agents are very effective as conversational interfaces when… more
Date: May 2003
Creator: Pothuru, Ranjit Kumar
Partner: UNT Libraries
open access

Amorphous and Thin-Film Silicon

Description: This paper outlines the key concepts set forth in the Amorphous and Thin-Film Silicon session at the National Center for Photovoltaics and Solar Program Review Meeting held March 26, 2003 in Denver, Colorado. Key elements of discussion centered around benchmarking the NREL/NCPV amorphous and thin-film silicon program, identifying holes in the scientific understanding of these materials and devices, identifying hurdles to large scale manufacturing, and what direction the program should take for … more
Date: May 1, 2003
Creator: Nelson, B. P.; Atwater, H. A.; von Roedern, B.; Yang, J.; Sims, P.; Deng, X. et al.
Partner: UNT Libraries Government Documents Department
open access

Analysis of a grid window structure for RF cavities in a Muon cooling channel

Description: We report on the electromagnetic and thermal analysis of a grid window structure for high gradient, low frequency RF cavities. Windows may be utilized to close the beam iris and increase shunt impedance of closed-cell RF cavities. This work complements previous work presented for windows made of solid beryllium foil. An electromagnetic and thermal analysis of the thin wall tubes in a grid pattern was conducted using both MAFIA4 and ANSYS finite element analyses. The results from both codes agre… more
Date: May 1, 2003
Creator: Ladran, A.; Li, D.; Moretti, A.; Rimmer, R.; Staples, J.; Virostek, S. et al.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Japanese Exports and Imports of Rice

Description: This research shows that the Japanese rice policy has affected the volume of exported and imported rice; moreover, multilateral and bilateral agreements have also affected Japanese rice policy. Japan's institution of subsidies and trade barriers has made its rice products too expensive for foreign trade and its domestic consumers. Since the WTO agreement has forced Japan to open its market gradually over six years, Japan may be unable to compete internationally because of its limited land, high… more
Date: May 2003
Creator: Shiraiwa, Toshio
Partner: UNT Libraries
open access

Analysis of the Massive Salt Fall in Big Hill Cavern 103

Description: This report summarizes recent reviews, observations, and analyses believed to be imperative to our understanding of the recent two million cubic feet salt fall event in Big Hill Cavern 103, one of the caverns of the Strategic Petroleum Reserve (SPR). The fall was the result of one or more stress driven mechanical instabilities, the origins of which are discussed in the report. The work has lead to important conclusions concerning the engineering and operations of the caverns at Big Hill. Specif… more
Date: May 1, 2003
Creator: MUNSON, DARRELL E.; BAUER, STEPHEN J.; RAUTMAN, CHRISTOPHER A.; EHGARTNER, BRIAN L. & SATTLER, ALLAN R.
Partner: UNT Libraries Government Documents Department
open access

Analytical study of envelope modes for a fully depressed beam in solenoidal and quadrupole periodic transport channels

Description: We present an analysis of envelope perturbations evolving in the limit of a fully space-charge depressed (zero emittance) beam in periodic, thin-lens focusing channels. Both periodic solenoidal and FODO quadrupole focusing channels are analyzed. The phase advance and growth rate of normal mode perturbations are analytically calculated as a function of the undepressed particle phase advance to characterize the evolution of envelope perturbations.
Date: May 2003
Creator: Bukh, Boris & Lund, Steven M.
Partner: UNT Libraries Government Documents Department
open access

Application of High-Temperature Mold Materials to Die Cast Copper Motor Rotor for Improved Efficiency

Description: The objective of the study, Application of High-Temperature Mold Materials to Die Cast Copper Motor Rotor for Improved Efficiency, was to support the Copper Development Association (CDA) in its effort to design, fabricate and demonstrate mold technologies designed to withstand the copper motor rotor die casting environment for an economically acceptable life. The anticipated result from the compiled data and tests were to: (1) identify materials suitable for die casting copper, (2) fabricate mo… more
Date: May 1, 2003
Creator: Cowie, John G.; Edwin F. Brush, Jr.; Peters, Dale T.; Midson, Stephen P. & Son, Darryl J. Van
Partner: UNT Libraries Government Documents Department
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