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507 Matching Results
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Modeling Large-Strain, High-Rate Deformation in Metals
The large strain deformation response of 6061-T6 and Ti-6Al-4V has been evaluated over a range in strain rates from 10{sup -4} s{sup -1} to over 10{sup 4} s{sup -1}. The results have been used to critically evaluate the strength and damage components of the Johnson-Cook (JC) material model. A new model that addresses the shortcomings of the JC model was then developed and evaluated. The model is derived from the rate equations that represent deformation mechanisms active during moderate and high rate loading. Another model that accounts for the influence of void formation on yield and flow behavior of a ductile metal (the Gurson model) was also evaluated. The characteristics and predictive capabilities of these models are reviewed.
Date:
July 20, 2001
Creator:
Lesuer, D. R.; Kay, G. J. & LeBlanc, M. M.
Object Type:
Article
System:
The UNT Digital Library
Stafford Loan Interest Rate Reduction: Background and Issues
None
Date:
July 20, 2007
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Bureau of Land Management (BLM) Lands and National Forests
The 109th congress is considering the issues related to the public lands managed by the Bureau of the Land Management (BLM) and the national forest managed by the Forest Service,
Date:
July 20, 2005
Creator:
Gorte, Ross W. & Vincent, Carol Hardy
Object Type:
Report
System:
The UNT Digital Library
Air Force Transformation
This report considers how the Air Force is changing itself to meet new defensive needs. The issues for Congress on this are mostly budgetary and how effective it will be.
Date:
July 20, 2007
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
Advanced Imaging Catheter: Final Project Report
Minimally invasive surgery (MIS) is an approach whereby procedures conventionally performed with large and potentially traumatic incisions are replaced by several tiny incisions through which specialized instruments are inserted. Early MIS, often called laparoscopic surgery, used video cameras and laparoscopes to visualize and control the medical devices, which were typically cutting or stapling tools. More recently, catheter-based procedures have become a fast growing sector of all surgeries. In these procedures, small incisions are made into one of the main arteries (e.g. femoral artery in the thigh), and a long thin hollow tube is inserted and positioned near the target area. The key advantage of this technique is that recovery time can be reduced from months to a matter of days. In the United States, over 700,000 catheter procedures are performed annually representing a market of over $350 million. Further growth in this area will require significant improvements in the current catheter technology. In order to effectively navigate a catheter through the tortuous vessels of the body, two capabilities must exist: imaging and positioning. In most cases, catheter procedures rely on radiography for visualization and manual manipulation for positioning of the device. Radiography provides two-dimensional, global images of the vasculature and …
Date:
July 20, 2001
Creator:
Krulevitch, P.; Colston, B.; DaSilva, L.; Hilken, D.; Kluiwstra, J. U.; Lee, A. P. et al.
Object Type:
Report
System:
The UNT Digital Library
Africa, the G8, and the Blair Initiative
Britain's Prime Minister Blair assumed the rotating presidency of the G8 group of nations (see text box) in January 2005, and he intends to use the July 2005 G8 summit, which he will chair, to push his Africa development initiative. Climate change will be the second focus of the G8 meeting, being called the "Gleneagles summit." The purpose of this report is to provide background on Africa, the G8, and the Gleneagles meeting. It outlines the British proposals and the U.S. reaction to them to date. In addition, it briefly reviews the problems that have inhibited African development and the response to those problems at previous G8 meetings. For additional information, see CRS Report RL32489, Africa: Development Issues and Policy Options, and CRS Issue Brief IB95052, Africa: U.S. Foreign Assistance Issues.
Date:
July 20, 2005
Creator:
Copson, Raymond W.
Object Type:
Report
System:
The UNT Digital Library
Navy LPD-17 Amphibious Ship Procurement: Background, Issues, and Options for Congress
None
Date:
July 20, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Federal Consent Decree Fairness Act (S. 489/H.R. 1229) – A Legal Analysis
None
Date:
July 20, 2005
Creator:
Dale, Charles V.
Object Type:
Report
System:
The UNT Digital Library
BioAerosol Mass Spectrometry: Reagentless Detection of Individual Airborne Spores and Other Bioagent Particles Based on Laser Desorption/Ionization Mass Spectrometry
Better devices are needed for the detection of aerosolized biological warfare agents. Advances in the ongoing development of one such device, the BioAerosol Mass Spectrometry (BAMS) system, are described here in detail. The system samples individual, micrometer-sized particles directly from the air and analyzes them in real-time without sample preparation or use of reagents. At the core of the BAMS system is a dual-polarity, single-particle mass spectrometer with a laser based desorption and ionization (DI) system. The mass spectra produced by early proof-of-concept instruments were highly variable and contained limited information to differentiate certain types of similar biological particles. The investigation of this variability and subsequent changes to the DI laser system are described. The modifications have reduced the observed variability and thereby increased the usable information content in the spectra. These improvements would have little value without software to analyze and identify the mass spectra. Important improvements have been made to the algorithms that initially processed and analyzed the data. Single particles can be identified with an impressive level of accuracy, but to obtain significant reductions in the overall false alarm rate of the BAMS instrument, alarm decisions must be made dynamically on the basis of multiple analyzed particles. …
Date:
July 20, 2004
Creator:
Steele, P T
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Class Actions and Proposed Reform in the 107th Congress: Class Action Fairness Act of 2002
This report discusses the class action and proposed reform in the 107th congress, in four different categories: (I) Background, (II) the legislation, (III) Section 1-7 and (IV) Possible Objections.
Date:
July 20, 2002
Creator:
Wallace, Paul Starett, Jr.
Object Type:
Report
System:
The UNT Digital Library
Literature Review and Assessment of Plant and Animal Transfer Factors Used in Performance Assessment Modeling
A literature review and assessment was conducted by Pacific Northwest National Laboratory (PNNL) to update information on plant and animal radionuclide transfer factors used in performance-assessment modeling. A group of 15 radionuclides was included in this review and assessment. The review is composed of four main sections, not including the Introduction. Section 2.0 provides a review of the critically important issue of physicochemical speciation and geochemistry of the radionuclides in natural soil-water systems as it relates to the bioavailability of the radionuclides. Section 3.0 provides an updated review of the parameters of importance in the uptake of radionuclides by plants, including root uptake via the soil-groundwater system and foliar uptake due to overhead irrigation. Section 3.0 also provides a compilation of concentration ratios (CRs) for soil-to-plant uptake for the 15 selected radionuclides. Section 4.0 provides an updated review on radionuclide uptake data for animal products related to absorption, homeostatic control, approach to equilibration, chemical and physical form, diet, and age. Compiled transfer coefficients are provided for cow’s milk, sheep’s milk, goat’s milk, beef, goat meat, pork, poultry, and eggs. Section 5.0 discusses the use of transfer coefficients in soil, plant, and animal modeling using regulatory models for evaluating radioactive waste …
Date:
July 20, 2003
Creator:
Robertson, David E.; Cataldo, Dominic A.; Napier, Bruce A.; Krupka, Kenneth M. & Sasser, Lyle B.
Object Type:
Report
System:
The UNT Digital Library
[Letter from Al Daniels to Jimmy Rocha]
Letter from Al Daniels to Jimmy Rocha on July 20, 2008 discussing yard signs sold at the TSDC booth at the Democratic Party State Convention.
Date:
July 20, 2008
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[2006 World Dance Alliance Global Assembly performance program, July 20, 2006 (lunch)]
Program from the 2006 World Dance Alliance Global Assembly, which was hosted in the Recital Hall at the Accolade East Building at York University in Toronto, Canada. The program from July 20 includes descriptions from the dance performances by Little Pear Garden Collective (Within...), Elena Quah (Pastoral Prayer), Danza Abend (Las Madres), M. Zihao Li (Faith), Cash & Company Dance (Garden), and the Menaka Thakkar Dance Company (Ashtapadi Abhinaya). Also in the program is a note from Mary Jane Warner, the Chair of the WDA Global Assembly.
Date:
July 20, 2006
Creator:
World Dance Alliance
Object Type:
Pamphlet
System:
The UNT Digital Library
[2006 World Dance Alliance Global Assembly performance program, July 20, 2006]
Program from the 2006 World Dance Alliance Global Assembly, which was held at the Sandra Faire and Ivan Fecan Theatre at York University in Toronto, Canada. The program from July 20 includes descriptions from the dance performances by Debra Brown and Dancers (Summertime), DanceArt Hong Kong (Blind Dates), African Dance Ensemble (Adesa), Terrill Maguire (Resurgence), Dance Theatre Group Interact (An Angel at my Table), and Contempodanza (Of dreams... seas). Also in the program is a note from Mary Jane Warner, the Chair of the WDA Global Assembly.
Date:
July 20, 2006
Creator:
World Dance Alliance
Object Type:
Pamphlet
System:
The UNT Digital Library
[2004 Board Member Calls for Dues]
A 2004 Board Member call for dues to be paid by Texas Daily Newspaper Association members. The document is sub-divided into three sections, "Delinquent Dues," "Dropped," and "Paid." Delinquent dues are newspapers who owe the association money, and dropped are the newspaper who are no longer part of the association because they never paid the due amount.
Date:
July 20, 2004
Creator:
Texas Daily Newspaper Association
Object Type:
Text
System:
The UNT Digital Library
[Agenda for TSDC Executive Board Meeting]
An agenda for the July 20, 2008 Executive Board meeting of the Texas Stonewall Democratic Caucus. An agenda for the July 20, 2008 meeting of the Texas Stonewall Democratic Caucus, listing a breakdown of various topics including committee reports and other businesses to be addressed during the meeting.
Date:
July 20, 2008
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Letter from Al Daniels to Edra Bogle]
Letter from Al Daniels to Edra Bogle on July 20, 2008 discussing political buttons sold at the TSDC booth at the Democratic Party State Convention.
Date:
July 20, 2008
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[TSDC Executive Board Meeting]
Agenda for the Texas Stonewall Democratic Caucus Executive Board Meeting on July 20, 2008. TSDC Executive Board Meeting Agenda on July 20, 2008 with a breakdown of various topics discussed including committee reports, and other businesses. Minutes for the June 6, 2008 Biennial Meeting of TSDC discussing various topics, reports, elections of officers, and other businesses in Austin, Texas. Minutes for the June 6, 2008 TSDC Executive Board Meeting State Convention discussing treasurers report, new business, old business and other topics.
Date:
July 20, 2008
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[TSDC Executive Board Meeting]
An agenda for the July 20, 2008 Executive Board meeting of the Texas Stonewall Democratic Caucus. An agenda for the July 20, 2008 meeting of the Texas Stonewall Democratic Caucus, listing a breakdown of various topics including committee reports and other businesses to be addressed during the meeting.
Date:
July 20, 2008
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Minutes of the Texas Stonewall Democratic Caucus Executive Board Meeting]
Minutes of executive board meeting of the Texas Stonewall Democrats Caucus on July 20, 2008. A breakdown of various topics discussed including platform presentation, various reports, old business, and new business.
Date:
July 20, 2008
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[TDNA 2005 Annual Meeting Report]
The 2005 Texas Daily Newspaper Association annual report meeting of the TNDA Board of Directors Meeting on July 28, 2005 held at the Headliner's Club in Austin, Texas. In the document, the reports states that low attendance at the annual meetings are affecting their expenses, because of the missing attendance from meetings the Driskill hotel has added $4,394 dollars in penalties to their bill.
Date:
July 20, 2007
Creator:
Texas Daily Newspaper Association
Object Type:
Report
System:
The UNT Digital Library
[Treasurers' Report to Executive Committee]
Texas Stonewall Democratic Caucus Treasurers' Report to Executive Committee on July 20, 2008. Records of all the financial transactions as of July 20, 2008. Proposed budget on July 20, 2008 to January 31, 2009 of a bank balance of $2,465.00. Email from Daniel Graney to multiple recipients discussing a proposed six-month budget for TSDC.
Date:
July 20, 2008
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Hydrogen Oxidation-Driven Hot Electron Flow Detected by Catalytic Nanodiodes
Hydrogen oxidation on platinum is shown to be a surface catalytic chemical reaction that generates a steady state flux of hot (>1 eV) conduction electrons. These hot electrons are detected as a steady-state chemicurrent across Pt/TiO{sub 2} Schottky diodes whose Pt surface is exposed to hydrogen and oxygen. Kinetic studies establish that the chemicurrent is proportional to turnover frequency for temperatures ranging from 298 to 373 K for P{sub H2} between 1 and 8 Torr and P{sub O2} at 760 Torr. Both chemicurrent and turnover frequency exhibit a first order dependence on P{sub H2}.
Date:
July 20, 2009
Creator:
Hervier, Antoine; Renzas, J. Russell; Park, Jeong Y. & Somorjai, Gabor A.
Object Type:
Article
System:
The UNT Digital Library
[2004 Record of Non-Members]
A document describing newspaper companies who were former / non-members of the Texas Daily Newspaper Association. The document gives description about the newspaper as well as the monetary dues they owe the association.
Date:
July 20, 2004
Creator:
Texas Daily Newspaper Association
Object Type:
Text
System:
The UNT Digital Library