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2.5 MHz feedforward beam loading compensation in the Fermilab Main Injector

Description: There are five 2.5 MHz ferrite cavities (h = 28) in the Main Injector with an R/Q of 500 that are presently used for coalescing for the Tevatron. For use with the Fermilab Recycler, feedforward (FF) beam loading compensation (BLC) is required on these cavities because they will be required to operate at a net of 2 kV. Under current Recycler beam conditions, the beam-induced voltage is of this order. Recently a system using a digital bucket delay module operating at 53 MHz (h = 588) was used to … more
Date: May 19, 2003
Creator: Dey, Joseph E.; Kourbanis, Ioanis & Steimel, James
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

3-D full waveform inversion of seismic data; Part I. Theory

Description: Full waveform inversion of seismic data is a challenging subject partly because of the lack of precise knowledge of the source. Since currently available approaches involve some form of approximations to the source, inversion results are subject to the quality and the choice of the source information used. A new full waveform inversion scheme has been introduced (Lee and Kim, 2003) using normalized wavefield for simple two-dimensional (2-D) scalar problems. The method does not require source in… more
Date: May 12, 2003
Creator: Lee, Ki Ha
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

''6-Degrees of Freedom'' Single Crystal Plasticity Experiments

Description: A deformation experiment has been developed specifically for the purpose of validation of dislocation dynamics simulations of plastic flow up to strains on the order of 1% [1]. The experiment has been designed so that a compressive uniaxial stress field is essentially super imposed on the test sample, and the crystal is free to deform with 3 orthogonal translation directions, and 3 rotation/tilt axes of freedom and has been given the name ''6-degrees of freedom'' (6DOF) experiment. The rotation… more
Date: May 21, 2003
Creator: Lassila, D. H.; Florando, J. N.; LeBlanc, M. M.; Arsenlis, T. & Rhee, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part 1

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks Upon the United States on May 22, 2003 at the Hart Senate Office Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the first panel on the commission mandate and objectives, with testimon… more
Date: May 22, 2003
Duration: 52 minutes 43 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part 2

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 22, 2003 at the Hart Office Senate Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the second panel on intelligence oversight and the joint inquiry with t… more
Date: May 22, 2003
Duration: 1 hour 34 minutes 46 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part 3

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 22, 2003 at the Hart Senate Office Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section contains the third panel on affected constituencies with testimony from Senators… more
Date: May 22, 2003
Duration: 1 hour 23 minutes 23 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part # 4

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 22, 2003 at the Hart Senate Office Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the panel on civil aviation security with testimony from representative… more
Date: May 22, 2003
Duration: 2 hours 45 minutes 13 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #2, May 23, 2003, Part 1

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 23 in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the panel on civil aviation security, with testimony from Norman Mineta, Major General Craig McKinley, and Lieut… more
Date: May 23, 2003
Duration: 2 hours 6 minutes 47 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #2, May 23, 2003, Part 2

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 23, 2003 in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section concludes the panel on civil aviation security, with testimony from Stephen McHale, Major General O.K. Steele, and … more
Date: May 23, 2003
Duration: 2 hours 31 minutes 29 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
Partner: UNT Libraries Government Documents Department
open access

53 MHZ Feedforward beam loading compensation in the Fermilab main injector

Description: 53 MHz feedforward beam loading compensation is crucial to all operations of the Main Injector. Recently a system using a fundamental frequency down converter mixer, a digital bucket delay module and a fundamental frequency up converter mixer were used to produce a one-turn-delay feedforward signal. This signal was then combined with the low level RF signal to the cavities to cancel the transient beam induced voltage. During operation they have shown consistently over 20 dB reduction in side-ba… more
Date: May 19, 2003
Creator: al., Joseph E Dey et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

2002 Chemical Engineering Division annual report.

Description: The Chemical Engineering Division is one of eight engineering research divisions within Argonne National Laboratory, one of the U.S. government's oldest and largest research laboratories. The University of Chicago oversees the laboratory on behalf of the U.S. Department of Energy (DOE). Argonne's mission is to conduct basic scientific research, to operate national scientific facilities, to enhance the nation's energy resources, and to develop better ways to manage environmental problems. Argonn… more
Date: May 22, 2003
Creator: Lewis, D.; Graziano, D. & Miller, J. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

3D Computations and Experiments

Description: This project is in its first full year after the combining of two previously funded projects: ''3D Code Development'' and ''Dynamic Material Properties''. The motivation behind this move was to emphasize and strengthen the ties between the experimental work and the computational model development in the materials area. The next year's activities will indicate the merging of the two efforts. The current activity is structured in two tasks. Task A, ''Simulations and Measurements'', combines all t… more
Date: May 12, 2003
Creator: Couch, R; Faux, D; Goto, D & Nikkel, D
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Abortion: Legislative Response

Description: The primary focus of this issue brief is legislative action in the 108th Congress with respect to abortion. However, discussion of those legislative proposals necessarily involves a brief discussion of the leading U.S. Supreme Court decisions concerning a woman’s right to choose whether to terminate her pregnancy. For a more detailed discussion of the relevant case law, see CRS Report 95-724, Abortion Law Development: A Brief Overview.
Date: May 9, 2003
Creator: Lewis, Karen J.; Shimabukuro, Jon O. & Ely, Dana
Item Type: Refine your search to only Report
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
Item Type: Refine your search to only Article
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.
Item Type: Refine your search to only Article
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.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Accelerator related backgrounds in the LHC forward detectors

Description: Detailed Monte Carlo simulations are performed on radiation environment in the LHC IP5 interaction region at the locations of the TOTEM Roman Pots proposed to detect particles produced at very small angles in the elastic scattering and diffraction dissociation processes at the LHC. Radiation loads on these detectors are calculated with the MARS14 code both of the pp-collision origin and beam loss related (beam-gas and tails from collimators).
Date: May 28, 2003
Creator: al., Nikolai V. Mokhov et
Item Type: Refine your search to only Article
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
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Accounting Reform After Enron: Issues in the 108th Congress

Description: This report discusses the anxieties within Congress in the wake of the Enron scandal. Moreover, the report notes that the 108th Congress is not likely to pass legislative reform as extreme as the 107th Congress, but will still confront issues of accounting reform. The report also highlights what the 108th Congress plans to reform.
Date: May 28, 2003
Creator: Jickling, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Achieving Order through CHAOS: the LLNL HPC Linux Cluster Experience

Description: Since fall 2001, Livermore Computing at Lawrence Livermore National Laboratory has deployed 11 Intel IA-32-based Linux clusters ranging in size up to 1154 nodes. All provide a common programming model and implement a similar cluster architecture. Hardware components are carefully selected for performance, usability, manageability, and reliability and are then integrated and supported using a strategy that evolved from practical experience. Livermore Computing Linux clusters run a common softwar… more
Date: May 2, 2003
Creator: Braby, R L; Garlick, J E & Goldstone, R J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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