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205 kA pulse power supply for neutrino focusing horns (open access)

205 kA pulse power supply for neutrino focusing horns

A new underground beamline is being constructed at Fermilab to generate and focus a beam of neutrinos on a detector 450 miles away in Soudan, Minnesota. A compact modulator utilizing capacitive energy storage and SCRs as the switching element has been built and tested at Fermilab. The 0.9 F capacitor bank operates at less than 1 kV. It delivers its output of up to 240 kA directly to the two series connected focusing horns via a multi-layer radiation hard stripline [1]. Dual pulse width capability allows for ready selection of 5.2 ms, for slow beam spills, or 2.6 ms operation for reduced thermal stresses on the focusing horns during fast spill. Intended for installation in an underground equipment room, the design incorporates several novel features to facilitate transport, installation, and maintenance. Various designs were examined to arrive at the most economical approach for providing the high pulse currents to the horns located in the very high radiation field, up to 3 x 10{sup 7} kRads/yr absorbed dose of the beamline. These included charge recovery and electronic polarity reversal systems. The direct coupling approach was selected for its overall economy and compactness. The system has been operational for several months and …
Date: June 21, 2002
Creator: Kenneth R. Bourkland, Kevin Roon and David Tinsley
Object Type: Article
System: The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 104, No. 83, Ed. 1 Friday, June 21, 2002 (open access)

Altus Times (Altus, Okla.), Vol. 104, No. 83, Ed. 1 Friday, June 21, 2002

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: June 21, 2002
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 80, No. 207, Ed. 1 Friday, June 21, 2002 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 80, No. 207, Ed. 1 Friday, June 21, 2002

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: June 21, 2002
Creator: Cash, Wanda Garner
Object Type: Newspaper
System: The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 97, No. 49, Ed. 1 Friday, June 21, 2002 (open access)

The Boerne Star (Boerne, Tex.), Vol. 97, No. 49, Ed. 1 Friday, June 21, 2002

Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date: June 21, 2002
Creator: Keasling, Edna
Object Type: Newspaper
System: The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, June 21, 2002 (open access)

Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, June 21, 2002

Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date: June 21, 2002
Creator: Stewart, James E.
Object Type: Newspaper
System: The Portal to Texas History
Charge transport in hybrid nanorod-polymer composite photovoltaiccells (open access)

Charge transport in hybrid nanorod-polymer composite photovoltaiccells

Charge transport in composites of inorganic nanorods and aconjugated polymer is investigated using a photovoltaic device structure.We show that the current-voltage (I-V) curves in the dark can be modelledusing the Shockley equation modified to include series and shuntresistance at low current levels, and using an improved model thatincorporates both the Shockley equation and the presence of a spacecharge limited region at high currents. Under illumination, theefficiency of photocurrent generation is found to be dependent on appliedbias. Furthermore, the photocurrent-light intensity dependence was foundto be sublinear. An analysis of the shunt resistance as a function oflight intensity suggests that the photocurrent as well as the fill factoris diminished as a result of increased photoconductivity of the activelayer at high light intensity. By studying the intensity dependence ofthe open circuit voltage for nanocrystals with different diameters andthus ! band gaps, it was inferred that Fermi-level pinning occurs at theinterface between the aluminum electrode and the nanocrystal.
Date: June 21, 2002
Creator: Huynh, Wendy U.; Dittmer, Janke J.; Teclemariam, Nerayo; Milliron, Delia; Alivisatos, A. Paul & Barnham, Keith W.J.
Object Type: Article
System: The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 107, No. 50, Ed. 1 Friday, June 21, 2002 (open access)

The Clifton Record (Clifton, Tex.), Vol. 107, No. 50, Ed. 1 Friday, June 21, 2002

Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date: June 21, 2002
Creator: Smith, W. Leon
Object Type: Newspaper
System: The Portal to Texas History
Daily Journal (Perry, Okla.), Vol. 109, No. 123, Ed. 1 Friday, June 21, 2002 (open access)

Daily Journal (Perry, Okla.), Vol. 109, No. 123, Ed. 1 Friday, June 21, 2002

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date: June 21, 2002
Creator: Brown, Gloria
Object Type: Newspaper
System: The Gateway to Oklahoma History
Dallas Voice (Dallas, Tex.), Vol. 19, No. 8, Ed. 1 Friday, June 21, 2002 (open access)

Dallas Voice (Dallas, Tex.), Vol. 19, No. 8, Ed. 1 Friday, June 21, 2002

Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date: June 21, 2002
Creator: Vercher, Dennis
Object Type: Newspaper
System: The UNT Digital Library
The Debt Limit: The Need to Raise It After Four Years of Surpluses (open access)

The Debt Limit: The Need to Raise It After Four Years of Surpluses

This report discusses the need to raise the debt limit after four years of Surpluses.
Date: June 21, 2002
Creator: Winters, Philip D.
Object Type: Report
System: The UNT Digital Library
Decision Plan for West Valley High-Level Waste Tank Lay-Up (open access)

Decision Plan for West Valley High-Level Waste Tank Lay-Up

Documents completion of Milestone A.3-1, "Issue Decision Plan for WVDP Tank Lay-Up," in Technical Task Plan RL30WT21A, "Post-Retrieval and Pre-Closure HLW Tank Lay-Up." This task is a collaborative effort among, Pacific Northwest National Laboratory, Jacobs Engineering Group Inc., and West Valley Nuclear Services. Thi primary objective of the overall task is to develop and evaluate conceptual strategies for preclosure lay-up of the two large high-level waste storage tanks at the West Valley Demonstration Project. Functions and requirments for tank lay-up were developed and previously documented in "Functions and Requirements for WVDP Lay-Up". These functions nad requirments served as the basis for cristeria to evaluate potential aly-up options documented in "West Valey High-Level Waste Tank Lay-Up Strategies".
Date: June 21, 2002
Creator: Elmore, Monte R. & Henderson, Colin
Object Type: Report
System: The UNT Digital Library
Defense Logistics: Better Fuel Pricing Practices Will Improve Budget Accuracy (open access)

Defense Logistics: Better Fuel Pricing Practices Will Improve Budget Accuracy

A letter report issued by the General Accounting Office with an abstract that begins "The Department of Defense (DOD) Defense Working Capital Fund was used to buy $70 billion in commodities in fiscal year 2001. This amount is estimated to grow to $75 billion for fiscal year 2003. The department's financial management regulation states that fund activities will operate in a business-like fashion and incorporate full costs in determining the pricing of their products. The National Defense Authorization Act for Fiscal year 2001 requires that GAO review the working capital fund activities to identify any potential changes in current management processes or policies that would result in a more efficient and economical operation. The act also requires that GAO review the Defense Logistics Agency's (DLA) efficiency, effectiveness, and flexibility of operational practices and identify ways to improve services. One such DLA activity, the Defense Energy Support Center, sold $4.7 billion of various petroleum-related products to the military services in fiscal year 2001. DOD's fuel prices have not reflected the full cost of fuel as envisioned in the working capital fund concept because cash movements to the fund balance and surcharge inaccuracies have affected the stabilized annual fuel prices. Over $4 …
Date: June 21, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Drug Control: International Policy and Options (open access)

Drug Control: International Policy and Options

Over the past decade, worldwide production of illicit drugs has risen dramatically: opium and marijuana production has roughly doubled and coca production tripled. Street prices of cocaine and heroin have fallen significantly in the past 20 years, reflecting increased availability. Despite apparent national political resolve to deal with the drug problem, inherent contradictions regularly appear between U.S. anti-drug policy and other national policy goals and concerns. The mix of competing domestic and international pressures and priorities has produced an ongoing series of disputes within and between the legislative and executive branches concerning U.S. international drug policy. One contentious issue has been the Congressionally-mandated certification process, an instrument designed to induce specified drug-exporting countries to prioritize or pay more attention to the fight against narcotics businesses.
Date: June 21, 2002
Creator: Lee, Rensselaer & Perl, Raphael F.
Object Type: Report
System: The UNT Digital Library
Electrochemical and physical analysis of a Li-ion cell cycled at elevated temperature (open access)

Electrochemical and physical analysis of a Li-ion cell cycled at elevated temperature

Laboratory-size LiNi0.8Co0.15Al0.05O2/graphite lithium-ion pouch cells were cycled over 100 percent DOD at room temperature and 60 degrees C in order to investigate high-temperature degradation mechanisms of this important technology. Capacity fade for the cell was correlated with that for the individual components, using electrochemical analysis of the electrodes and other diagnostic techniques. The high-temperature cell lost 65 percent of its initial capacity after 140 cycles at 60 degrees C compared to only 4 percent loss for the cell cycled at room temperature. Cell ohmic impedance increased significantly with the elevated temperature cycling, resulting in some of loss of capacity at the C/2 rate. However, as determined with slow rate testing of the individual electrodes, the anode retained most of its original capacity, while the cathode lost 65 percent, even when cycled with a fresh source of lithium. Diagnostic evaluation of cell components including XRD, Raman, CSAFM and suggest capacity loss occurs primarily due to a rise in the impedance of the cathode, especially at the end-of-charge. The impedance rise may be caused in part by a loss of the conductive carbon at the surface of the cathode and/or by an organic film on the surface of the cathode that becomes …
Date: June 21, 2002
Creator: Shim, Joongpyo; Kostecki, Robert; Richardson, Thomas; Song, Xiangyun & Striebel, Kathryn A.
Object Type: Article
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, June 21, 2002 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Friday, June 21, 2002

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: June 21, 2002
Creator: Bush, Kent
Object Type: Newspaper
System: The Gateway to Oklahoma History
FBI Reorganization: Initial Steps Encouraging but Broad Transformation Needed (open access)

FBI Reorganization: Initial Steps Encouraging but Broad Transformation Needed

Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses the Federal Bureau of Investigation's (FBI) proposed reorganization and realignment plans. The FBI's plans are part of a broader effort to fundamentally transform the federal government in light of recent trends and long-range fiscal challenges. As it moves into the 21st century, the country faces several key trends, including global interdependence; diverse, diffuse, and asymmetrical security threats; rapidly evolving science and technologies; dramatic shifts in the age and composition of the population; important quality of life issues; and evolving government structures and concepts. The second phase of the reorganization focuses on major aspects of FBI's realignment efforts, including realigning staff, building analytical capacity, the National Infrastructure Protection Center, and recruiting. Other issues include (1) major communications and information technology improvements, (2) development of an internal control system that will ensure protection of civil liberties as investigative constraints are loosened, and (3) management of the ripple effect that changes at the FBI will have on other aspects of the law enforcement community. As the FBI moves to effectively meet the realities and challenges since September 11, it should reconsider employing the major elements of successful transformation …
Date: June 21, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Final Report West Valley High-Level Waste Tank Lay-Up (open access)

Final Report West Valley High-Level Waste Tank Lay-Up

This report documents completion of Milestone A.4-1 "Issue Tank Lay-Up Strategies for WVDP Final Report," in Technical Task Plan RL3-WT21A, "Post-Retrieval and Pre-Closure HLW Tank Lay-Up." This task was a collaborative effort among Pacific Northwest National Laboratory, Jacobs Engineering Group Inc., and West Valley Nuclear Services. The primary objective of the overall task was to develop and evaluate conceptual strategies for preclosure lay-up of the two large high-level waste storage tanks at the West Valley Demonstration Project.
Date: June 21, 2002
Creator: Elmore, Monte R. & Henderson, Colin
Object Type: Report
System: The UNT Digital Library
Financial Management: Audit of the Centennial of Flight Commission for FY 2001 (open access)

Financial Management: Audit of the Centennial of Flight Commission for FY 2001

Correspondence issued by the General Accounting Office with an abstract that begins "The Centennial of Flight Commission was created in November to commemorate the 100th anniversary of the Wright brothers' flight at Kitty Hawk, North Carolina, in 1903. The Commission is to provide recommendations and advice to the President, Congress, and federal agencies on the most effective ways to encourage and promote national and international participation and sponsorships in commemoration of the centennial of powered flight. All 156 of the Commission's recorded obligations and expenditures during fiscal year 2001 were supported by documentation that was approved by management. The Commission recorded no donations, user fees, or in-kind donations for fiscal year 2001. The Commission's financial records for fiscal year 2001 contained some minor errors that went unnoticed due to a lack of complete records being maintained by the Commission, as well as the Federal Aviation Administration and the National Aeronautics and Space Administration which provide administrative support to the Commission."
Date: June 21, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
First Principles Thermoelasticity of Tantalum at High Pressures (open access)

First Principles Thermoelasticity of Tantalum at High Pressures

The thermoelastic properties of bcc tantalum have been investigated over a broad range of temperatures (up to 12000 K) and pressures (up to 10 Mbar) using first-principles methods that account for cold, electron-thermal, and ion-thermal contributions. Specifically, we have combined ab initio all electron electronic-structure calculations for the cold and electron-thermal contributions to the elastic moduli with phonon contributions for the ion-thermal part calculated using model generalized pseudopotential theory (MGPT). For the latter, a summation of terms over the Brillouin zone is performed within the quasi-harmonic approximation, where each term is composed of a strain derivative of the phonon frequency at a particular k-point. At ambient pressure, the resulting temperature dependence of the elastic moduli is in excellent agreement with ultrasonic measurements. The experimentally observed anomalous behavior of C44 at low temperatures is shown to originate from the electron-thermal contribution. At higher temperatures, the dominant contribution to the temperature dependence of the elastic moduli comes from thermal expansion. Also, the pressure dependence of the moduli compares well with recent diamond and cell measurements up to 105 GPa. The calculated longitudinal and bulk sound velocities at higher pressure and temperature agree well with data obtained from shock experiments. Additionally, the temperature …
Date: June 21, 2002
Creator: Orlikowski, Daniel A.; Soderlind, Per & Moriarty, John A.
Object Type: Article
System: The UNT Digital Library
Flood Insurance: Extent of Noncompliance with Purchase Requirements Is Unknown (open access)

Flood Insurance: Extent of Noncompliance with Purchase Requirements Is Unknown

A letter report issued by the General Accounting Office with an abstract that begins "The Federal Emergency Management Agency (FEMA) run National Flood Insurance Program (NFIP) has combined flood hazard mitigation efforts and insurance to protect homeowners against losses from floods. The program provides an incentive for communities to adopt floodplain management ordinances to mitigate the effect of flooding upon new or existing structures. Virtually all communities in the country with flood-prone areas now participate in the NFIP, and over four million U.S. households have flood insurance. Nevertheless, the President's proposed budget for 2003 characterizes the NFIP as "moderately effective," because many at-risk properties remain uninsured. The proposed budget establishes a goal to increase flood insurance policies in force by five percent in 2003 and would increase funding for flood zone mapping activities to better identify at-risk properties. Although the assessment and goal described in the proposed budget apply to the entire NFIP, the success of a particular component of the program--the mandatory purchase requirement--has been the subject of debate for many years. The federal bank regulators overseeing lending institutions that hold or service mortgages on properties that must have flood insurance believe that there is a high level of …
Date: June 21, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Functions and Requirements for West Valley Demonstration Project Tank Lay-up (open access)

Functions and Requirements for West Valley Demonstration Project Tank Lay-up

Documents completion of Milstone A.1-1, "Issue Functions and Requirements for WVDP Tank Lay-Up," in Technical Task Plan TTP RL3-WT21A - "Post-Retrival and Pre-Closure HLW Tank Lay-Up." This task is a collaborative effort among Pacific Northwest National Laboratory, Jacobs Engineering Group Inc., and West Valley Nuclear Services (WVNS). Because of the site-specific nature oft his task, the involvement of WVNS personnel is critical to the success of this task.
Date: June 21, 2002
Creator: Elmore, Monte R. & Henderson, Colin
Object Type: Report
System: The UNT Digital Library
High-Level Waste Tank Lay-Up Assessment - Year-End Progress Report (open access)

High-Level Waste Tank Lay-Up Assessment - Year-End Progress Report

This report documents the preliminary needs assessment of high-level waste (HLW) tank lay-up requirements and considerations for the Hanford Site, Idaho Naitonal Engeineering and Environmental Lab (INEEL), Savannah River Site (SRS) and Oak Ridge Reservation (ORR). This assessment includes the development of a high-level requirements and considerations list that evolved from work done for the West Valley Demonstration Project (WVDP) earlier in fiscal year (FY) 2001, and is based on individual site conditions and tank retrieval/tank closure schedules. Because schedules are continually subject to change, this assessment is considered preliminary and needs review and validation by the individual sites. The lay-up decision methodology developed for WVDP was based on standard systems engineering principles, and provided a structured framework for producing an effective, technically-defensible lay-up strategy.
Date: June 21, 2002
Creator: Elmore, Monte R. & Henderson, Colin
Object Type: Report
System: The UNT Digital Library
Iraq-U.S. Confrontation (open access)

Iraq-U.S. Confrontation

None
Date: June 21, 2002
Creator: Prados, Alfred B. & Katzman, Kenneth
Object Type: Report
System: The UNT Digital Library
Kashmir: Recent Developments and U.S. Concerns (open access)

Kashmir: Recent Developments and U.S. Concerns

None
Date: June 21, 2002
Creator: Gupta, Amit & Leather, Kaia
Object Type: Report
System: The UNT Digital Library