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open access

Financial Management: Improper Payments Reported in Fiscal Year 2000 Financial Statements

Description: Correspondence issued by the General Accounting Office with an abstract that begins "This report provides information on improper payments that federal agencies reported in their fiscal year 2000 financial statements. GAO found that the amount of improper payments reported in agency financial statements has remained consistent at about $20 billion for the past three years. Even though these amounts are substantial, agency-specific audits and studies indicate the improper payment problem is much… more
Date: November 2, 2001
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Radiation sources and diagnostics with ultrashort electron bunches

Description: The basic principles and design of radiation sources (transition radiation, Cerenkov radiation, radiation from periodic structures, etc.) and radiation-based diagnostics will be discussed, with emphasis on radiation from ultra-short electron bunches. Ultra-short electron bunches have the potential to produce high peak flux radiation sources that cover wavelength regimes where sources are currently not widely available (coherent THz/IR) as well as ultrashort X-ray pulses (3-100 fs). While radiat… more
Date: November 2, 2001
Creator: Catravas, P.; Esarey, E. & Leemans, W. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Indian Issues: Improvements Needed in Tribal Recognition Process

Description: A letter report issued by the General Accounting Office with an abstract that begins "The Indian gambling industry has flourished since the enactment of the Indian Gaming Regulatory Act in 1988. Nearly 200 tribes generated about $10 billion in annual revenues in 1999 from their gambling operations. Because of weaknesses in the federal recognition process, the basis for tribal recognition decisions by the Bureau of Indian Affairs (BIA) is not always clear and the length of time involved can be s… more
Date: November 2, 2001
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Means-Tested Programs: Determining Financial Eligibility Is Cumbersome and Can Be Simplified

Description: A letter report issued by the General Accounting Office with an abstract that begins "About 80 means-tested federal programs assisted low-income people in 1998. GAO reviewed 11 programs that assisted families and individuals with income, food, medical assistance, and housing. Despite substantial overlap in the populations they serve, the 11 programs varied significantly in their financial eligibility rules. At the most basic level, the dollar levels of the income limits--the maximum amounts of … more
Date: November 2, 2001
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Fort Worth murders]

Description: B-roll video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.
Date: November 2, 2001, 10:00 p.m.
Duration: 1 minute 14 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Plane diverted]

Description: B-roll video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.
Date: November 2, 2001, 6:00 p.m.
Duration: 1 minute 05 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Young physicists' forum

Description: The Young Physicists' Forum was an opportunity for the younger members of the particle-physics community to gather at Snowmass 2001 and to study and debate major issues that face the field over the next twenty years. Discussions were organized around three major topics: outreach and education, the impact of globalization, and building a robust and balanced field. We report on the results of these discussions, as presented on July 17, 2001.
Date: November 2, 2001
Creator: al., T. Adams et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improved process control through real-time measurement of mineral content

Description: In a highly collaborative research and development project with mining and university partners, sensors and data-analysis tools are being developed for rock-mass characterization and real-time measurement of mineral content. Determining mineralogy prior to mucking in an open-pit mine is important for routing the material to the appropriate processing stream. A possible alternative to lab assay of dust and cuttings obtained from drill holes is continuous on-line sampling and real-time x-ray fluo… more
Date: November 2, 2001
Creator: Turler, Daniel; Karaca, Murat; Davis, William B.; Giauque, Robert D. & Hopkins, Deborah
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A two-level fanout system for the CDF silicon vertex tracker

Description: The Fanout system is part of the Silicon Vertex Tracker, a new trigger processor designed to reconstruct charged particle trajectories at Level 2 of the CDF trigger, with a latency of 10 {micro}s and an event rate up to 100 kHz. The core of SVT is organized as 12 identical slices, which process in parallel the data from the 12 independent azimuthal wedges of the Silicon Vertex Detector (SVXII). Each SVT slice links the digitized pulse heights found within one SVXII wedge to the tracks reconstru… more
Date: November 2, 2001
Creator: al., A. Bardi et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The CDF online silicon vertex tracker

Description: The CDF Online Silicon Vertex Tracker reconstructs 2-D tracks by linking hit positions measured by the Silicon Vertex Detector to the Central Outer Chamber tracks found by the eXtremely Fast Tracker. The system has been completely built and assembled and it is now being commissioned using the first CDF run II data. The precision measurement of the track impact parameter will allow triggering on B hadron decay vertices and thus investigating important areas in the B sector, like CP violation and… more
Date: November 2, 2001
Creator: al., W. Ashmanskas et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Spectral Properties of Americium(III) in Silicate Matrices: Concentration-Dependent Up-Conversion Emission

Description: We have been pursuing the spectroscopic properties of actinide ions in silicate matrices. One facet of these studies involves the behavior of Stokes and anti-Stokes emissions exhibited by Am'' in these hosts. Several attributes have been found to influence the spectral profile, which include excitation wavelength, laser power, and dopant-concentration. Excitation with the 514.5 nm (19435 cm{sup -1}) line of argon laser provides anti-Stokes emissions at 21100 and -19920 cm{sup -1} in the boro-si… more
Date: November 2, 2001
Creator: Assefa, Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

GEM-type detectors using LIGA and etchable glass technologies

Description: Gas electron multipliers (GEMS) have been made by a deep X-ray lithography technique (LIGA process) using synchrotron radiation on polymethylmethacrylate (PMMA) and by UV processes using a UV etchable glass. Gain, stability and rate capability for these detectors are described.The LIGA detectors described consist of PMMA sheets of various thicknesses, 125mm to 350mm, and have 150mm x 150mm square holes spaced with a pitch of 300mm. Thin copper electrodes are plated on the top and bottom surface… more
Date: November 2, 2001
Creator: Ahn, S. K.; Kim, J. G.; Perez-Mendez, V.; Chang, S.; Jackson, K. H.; Kadyk, J. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Benchmarking residual dose rates in a NuMI-like environment

Description: Activation of various structural and shielding materials is an important issue for many applications. A model developed recently to calculate residual activity of arbitrary composite materials for arbitrary irradiation and cooling times is presented in the paper. Measurements have been performed at the Fermi National Accelerator Laboratory using a 120 GeV proton beam to study induced radioactivation of materials used for beam line components and shielding. The calculated residual dose rates for… more
Date: November 2, 2001
Creator: al., Igor L. Rakhno et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tagging of Isobars Using Energy Loss and Time-of-flight Measurements

Description: The technique for tagging isobars in a mixed beam by measuring energy loss by time-of-flight has been tested. With this method, isobar separation should improve by allowing more energy loss (thicker absorber), but only if one can control absorber homogeneity. Measurements of beam energy toss and energy spread obtained under such conditions were shown to be close to predicted values using both collisional and charge exchange contributions to energy straggling. The calculation of energy stragglin… more
Date: November 2, 2001
Creator: Shapira, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The CDF computing and analysis system: First experience

Description: The Collider Detector at Fermilab (CDF) collaboration records and analyses proton anti-proton interactions with a center-of-mass energy of 2 TeV at the Tevatron. A new collider run, Run II, of the Tevatron started in April. During its more than two year duration the CDF experiment expects to record about 1 PetaByte of data. With its multi-purpose detector and center-of-mass energy at the frontier, the experimental program is large and versatile. The over 500 scientists of CDF will engage in sea… more
Date: November 2, 2001
Creator: al., R. Colombo et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Vibrational Raman and Optical Studies of Cm in Zirconia-Based Pyrochlores and Related Oxides Matrices

Description: Raman spectroscopy has been employed to follow the phase behavior of Cm-Zr oxide materials as a function of Cm:Zr ratio. Three different structural phases, monoclinic, cubic and pyrochlore, are formed when the Cm:Zr ratio is varied from >0 to 1. Each phase produces a distinct Raman profile in the 100-700 cm{sup -1} spectral region. Up to 10 atom % Cm, the Raman spectra indicate that the monoclinic structure is dominant. Raman bands corresponding to the monoclinic phase are absent in samples … more
Date: November 2, 2001
Creator: Assefa, Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The CDF Run II disk inventory manager

Description: The Collider Detector at Fermilab (CDF) experiment records and analyses proton-antiproton interactions at a center-of-mass energy of 2 TeV. Run II of the Fermilab Tevatron started in April of this year. The duration of the run is expected to be over two years. One of the main data handling strategies of CDF for Run II is to hide all tape access from the user and to facilitate sharing of data and thus disk space. A disk inventory manager was designed and developed over the past years to keep tra… more
Date: November 2, 2001
Creator: Lammel, Paul Hubbard and Stephan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PDF Uncertainties in WH Production at Tevatron

Description: We apply a method proposed by members of CTEQ Collaboration to estimate the uncertainty in associated W-Higgs boson production at Run II of the Tevatron due to our imprecise knowledge of parton distribution functions. We find that the PDF uncertainties for the signal and background rates are of the order 3%. The PDF uncertainties for the important statistical quantities (significance of the Higgs boson discovery, accuracy of the measurement of the WH cross section) are smaller (1.5%) due to the… more
Date: November 2, 2001
Creator: Sullivan, P. M. Nadolsky and Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Fast and Accurate Position Sensitive Timing Detector for Charged Particles

Description: A position-sensitive timing detector suitable for detection of low-energy heavy ions is described. The device is based on the detection of secondary electrons emitted following ion impact on a surface. Using a combination of magnetic and electric fields these devices can deliver sub-nanosecond time definition and sub-millimeter position information for ion impact. When choosing a thin foil for the surface intercepting the heavy ion trajectory, multiple detectors can be used and reliable trackin… more
Date: November 2, 2001
Creator: Shapira, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Preliminary results of a PWA of the centrally produced {phi}{phi} system

Description: The authors present preliminary results of a Partial Wave Analysis of the centrally produced {phi}{phi} system at 800 GeV/c in the reaction pp {yields} p{sub slow} ({phi}{phi})p{sub fast}. The preliminary results with one and two M = 0 waves, indicate that most of the cross section can be described by two waves, with J{sup PC} LS{sup {eta}} = 2{sup 2}02{sup -1}, 0{sup 2}00{sup -1}.
Date: November 2, 2001
Creator: al., Marco A. Reyes et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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