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338 Matching Results
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Electronic and Transport Properties of Artificial Gold Chains
Article on electronic and transport properties of artificial gold chains.
Date:
August 27, 2004
Creator:
Calzolari, Arrigo; Cavazzoni, Carlo & Buongiorno Nardelli, Marco
Object Type:
Article
System:
The UNT Digital Library
BRAC Commission Early Bird 24 August 2005
Collection of BRAC related news articles and clippings. Produced for Commission staff review.
Date:
August 27, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
BRAC Commission Early Bird August 25 2005
Collection of BRAC related news articles and clippings. Produced for Commission staff review.
Date:
August 27, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
BRAC Commission Early Bird August 26 2005
Collection of BRAC related news articles and clippings. Produced for Commission staff review.
Date:
August 27, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
BRAC Commission Early Bird August 27 2005
Collection of BRAC related news articles and clippings. Produced for Commission staff review.
Date:
August 27, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
Community Correspondence – Letter dtd 07/30/2005 to Chairman Principi from Tom Roberts
Community Correspondence – Letter dtd 07/30/2005 to Chairman Principi from Tom Roberts regarding the proposed realignment of AFRL/SNH and AFRL/VSB from Hanscom AFB, MA attaching a document titled “Technical Joint Cross Service Group Analysis and Recommendations Volume XII dtd 05/19/2005
Date:
August 27, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
District of Columbia Jail: Management Challenges Exist in Improving Facility Conditions
A letter report issued by the Government Accountability Office with an abstract that begins "The District of Columbia's Jail and Correctional Treatment Facility (CTF), which are the District's detention facilities for misdemeanant and pretrial detainees, have been repeatedly cited for violations of health and safety standards. The Jail also has had problems with releasing inmates before or after their official release date, in part, because of inaccuracies in its electronic inmate records. As a follow-on to problems at the Jail reported in 2002 by the District's Inspector General, GAO addressed the following questions: (1) What are the results of recent health and safety inspections? (2) What is the status of the Jail's capital improvement projects, and what policies and procedures does the Department of Corrections (DoC) use in managing the projects? and (3) What progress has been made in improving electronic inmate records at the Jail?"
Date:
August 27, 2004
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Department of Homeland Security: Formidable Information and Technology Management Challenge Requires Institutional Approach
A letter report issued by the Government Accountability Office with an abstract that begins "In 2003 GAO designated the merger of 22 separate federal entities into the Department of Homeland Security (DHS) as a high risk area because of the criticality of the department's mission and the enormous transformation challenges that the department faced. Given that the effective use of information technology (IT) is a critical enabler of this merger, GAO has previously reported on a number of DHS efforts aimed at institutionalizing an effective information and technology governance structure and investing in new IT systems that are intended to better support mission operations. Now that DHS has been operating for over a year, GAO was asked to, based largely on its prior work, describe DHS's progress in meeting its information and technology management challenge."
Date:
August 27, 2004
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Financial Audit: U.S. Senate Stationery Room Revolving Fund's Fiscal Years 2002 and 2001 Financial Statements
A letter report issued by the Government Accountability Office with an abstract that begins "This report presents the results of our audit of the Senate Stationery Room's Statement of Receipts, Disbursements, and Fund Balance for the fiscal years ended September 30, 2002 and September 30, 2001. This report also contains our opinion on the effectiveness of the Fund's related internal control as of September 30, 2002, and our evaluation of its compliance with selected provision of laws and regulations we tested."
Date:
August 27, 2004
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Financial Audit: U.S. Senate Gift Shop Revolving Fund's Fiscal Years 2002 and 2001 Financial Statements
A letter report issued by the Government Accountability Office with an abstract that begins "This report presents the results of our audit of the Senate Gift Shop's Statement of Receipts, Disbursements, and Fund Balance for the fiscal years ended September 30, 2002 and September 30, 2001. This report also contains our opinion on the effectiveness of the Fund's related internal control as of September 30, 2002, and our evaluation of its compliance with selected provision of laws and regulations we tested. We performed this audit at Congressional request."
Date:
August 27, 2004
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Hyperon Polarization in Unpolarized Scattering Processes
Transverse polarization in the Hyperon (\Lambda) production in the unpolarizeddeep inelastic scattering and pp collisions is studied in the twist-three approach, considering the contribution from the quark-gluon-antiquark correlation distribution in nucleon. We further compare our results for deep inelastic scattering to a transverse momentum dependent factorization approach, and find consistency between the two approaches in the intermediate transverse momentum region. We also find that in pp collisions, there are only derivative terms contributions, and the non-derivative terms vanish.
Date:
August 27, 2008
Creator:
Zhou, Jian; Yuan, Feng & Liang, Zuo-Tang
Object Type:
Article
System:
The UNT Digital Library
Studies of Background Levels for the NIF Yield Diagnostics from Neutron and Gamma Radiation
The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) is nearing completion of construction and is preparing for the National Ignition Campaign (NIC) with potentially significant yield in 2010. The design of a wide range of yield diagnostics in and outside the target-bay of the NIF must consider scattered background neutrons and neutron-induced gamma rays to measure neutrons and x-rays from target. The large and complex target chamber and facility make the calculation of scattered neutrons and gamma rays extremely challenging. The NIF was designed with shielded locations for many of the yield diagnostics including the neutron alcove and four diagnostic mezzanines. Accurate calculation of the background levels in these shielded locations requires advanced Monte Carlo techniques, e.g., variance reduction. Placement, size, and materials of collimators on the line of sight (LOS) through the shielding must be evaluated to trade off signal levels and unwanted backgrounds. The background at these locations is also affected by neutrons that pass through the laser beam tubes and scatter off of structures and walls in the switch yards. Detailed 3D Monte Carlo analyses are performed to determine neutron and gamma fluxes for some of the yield diagnostics.
Date:
August 27, 2007
Creator:
Song, P.; Eder, D.; Moran, M.; Landen, O.; O'Brien, D. & Hsing, W.
Object Type:
Article
System:
The UNT Digital Library
GLASS FORMULATION DEVELOPMENT AND TESTING FOR COLD CRUCIBLE INDUCTION MELTER (CCIM) ADVANCED REMEDIATION TECHNOLOGIES DEMONSTRATION PROJECT - 9208
Over the past few years, Cold Crucible Induction Melter (CCIM) demonstrations have been completed using SRS sludge batches 2, 3 and 4 (SB2, SB3 and SB4) simulant compositions. These campaigns demonstrated the ability of the CCIM to effectively produce quality glasses at high waste loadings. The current Advanced Remediation Technology (ART) Phase II-A Project is aimed at demonstrating the CCIM technology under representative DWPF flowsheet conditions and to demonstrate extended operations of the melter. A glass composition development effort was completed to identify and recommend a frit composition and sludge batch 4 (SB4) simulant waste loading target for subsequent ART-Phase II-A CCIM demonstration testing. Based on the results of the glass formulation testing, it was recommended that the Frit 503-R6 composition (B{sub 2}O{sub 3} = 14 wt %; Li{sub 2}O = 9 wt %; Na{sub 2}O = 3 wt %; and SiO{sub 2} = 74 wt %) be utilized for the demonstration. Furthermore, a waste loading of 46 wt % was recommended. The recommended frit and waste loading would produce a glass with acceptable durability with a liquidus temperature adequately below the 1250 C nominal CCIM operating temperature. This frit composition and waste loading was found to result in a …
Date:
August 27, 2008
Creator:
Marra, J; Amanda Billings, A; David Peeler, D; Michael Stone, M & Tommy Edwards, T
Object Type:
Article
System:
The UNT Digital Library
SAVANNAH RIVER SITE ENVIRONMENTAL REPORT FOR 2007
The Savannah River Site Environmental Report for 2007 (WSRC-STI-2008-00057) prepared for the US Department of Energy (DOE) according to requirements of DOE Order 231.1A, 'Environment, Safety and Health Reporting', and DOE Order 5400.5, 'Radiation Protection of the Public and Environment'. The report's purpose is to: (1) present summary environmental data that characterize site environmental management performance; (2) confirm compliance with environmental standards and requirements; (3) highlight significant programs and efforts; (4) assess the impact of SRS operations on the public and the environment.
Date:
August 27, 2008
Creator:
Mamatey, A
Object Type:
Report
System:
The UNT Digital Library
The Effect of Magnetic Field on the Position of HTS Leads and theCooler in the Services Tower of the MICE Focusing Magnet
The MICE focusing solenoids have three 4 K coolers (two forthe superconducting magnet and one for the liquid absorber) and four HTSleads that feed the current to the focusing coils. The focusing solenoidsproduce large radial external fields when they operate with the polarityof the two coils in opposition (the gradient or flip mode). When the MICEfocusing coils operate at the same polarity (the solenoid or non-flipmode), the fields are much smaller and parallel to the axis of thesolenoid. The worst-case magnetic field affects the selection of thecooler and the HTS leads. This magnetic field can also determine theheight of the service towers that house the three coolers and the fourHTS leads. This paper shows the criteria used for Cooler selection, HTSlead selection, and the position of both the cooler and leads withrespect to the solenoid axis of rotation.
Date:
August 27, 2007
Creator:
Green, M. A.; Yang, S. Q.; Cobb, J.; Lau, P.; Lau, W. W.; Witte, H. et al.
Object Type:
Article
System:
The UNT Digital Library
THE DOE OFFICE OF ENVIRONMENTAL MANAGEMENT INTERNATIONAL COOPERATIVE PROGRAM: CURRENT STATUS AND PLANS FOR EXPANSION
None
Date:
August 27, 2008
Creator:
Marra, J; Kevin Fox, K; David Peeler, D; Michael02 Smith, M; Tim Jannik, T & Eduardo Farfan, E
Object Type:
Article
System:
The UNT Digital Library
The Engineering Design of the 1.5 m Diameter Solenoid for the MICERFCC Modules
The RF coupling coil (RFCC) module of MICE is where muonsthat have been cooled within the MICE absorber focus (AFC) modules arere-accelerated to their original longitudinal momentum. The RFCC moduleconsists of four 201.25 MHz RF cavities in a 1.4 meter diameter vacuumvessel. The muons are kept within the RF cavities by the magnetic fieldgenerated by a superconducting coupling solenoid that goes around the RFcavities. The coupling solenoid will be cooled using a pair of 4 K pulsetube cooler that will generate 1.5 W of cooling at 4.2 K. The magnet willbe powered using a 300 A two-quadrant power supply. This report describesthe ICST engineering design of the coupling solenoid forMICE.
Date:
August 27, 2007
Creator:
Wang, L.; Green, M. A.; Xu, F. Y.; Wu, H.; Li, L. K.; Gou, C. S. et al.
Object Type:
Article
System:
The UNT Digital Library
The Cost of Superconducting Magnets as a Function of Stored Energy and Design Magnetic Induction Times the Field Volume
By various theorems one can relate the capital cost of superconducting magnets to the magnetic energy stored within that magnet. This is particularly true for magnet where the cost is dominated by the structure needed to carry the magnetic forces. One can also relate the cost of the magnet to the product of the magnetic induction and the field volume. The relationship used to estimate the cost the magnet is a function of the type of magnet it is. This paper updates the cost functions given in two papers that were published in the early 1990 s. The costs (escalated to 2007 dollars) of large numbers of LTS magnets are plotted against stored energy and magnetic field time field volume. Escalated costs for magnets built since the early 1990 s are added to the plots.
Date:
August 27, 2007
Creator:
Green, Mike; Green, M. A. & Strauss, B. P.
Object Type:
Article
System:
The UNT Digital Library
Hydra modeling of experiments to study ICF capsule fill hole dynamics using surrogate targets
In this section the results of HYDRA [1] design simulations will be discussed. The simulations were conducted in two dimensional, RZ geometry, with the fill tube on axis. The radiation transport was treated in the diffusion approximation using 15 energy groups. Opacities were calculated. The equations of state (EOS) for all materials used were from a combined analytic/Thomas-Fermi EOS which uses a modified Cowan model for the ion EOS, and uses a scaled Thomas-Fermi table for the electron EOS.
Date:
August 27, 2007
Creator:
Elliott, J B
Object Type:
Report
System:
The UNT Digital Library
MECHANISMS OF PHASE FORMATION IN THE VITRIFICATION OF HIGH-FERROUS SAVANNAH RIVER SITE SB2 HLW SLUDGE SURROGATE - 9300
Phase formation mechanisms associated with the vitrification of high-ferrous Savannah River Site (SRS) Sludge Batch 2 (SB2) high level waste surrogate were studied by infrared spectroscopy (IRS) and X-ray diffraction (XRD). Two mixtures at 50 wt% waste loading with commercially available Frit 320 (Li{sub 2}O - 8 wt %, B{sub 2}O{sub 3} - 8 wt %, Na{sub 2}O - 12 wt %, SiO{sub 2} - 72 wt %) and batch chemicals (LiOH {center_dot} H{sub 2}O, H{sub 3}BO{sub 3}, NaNO{sub 3}, SiO{sub 2}) to represent the frit formulation were prepared as slurries with a water content of {approx}50 wt%. The mixtures were air-dried at a temperature of 115 C and heat-treated at 500, 700, 900, 1000, 1100, 1200, and 1300 C for 1 hr at each temperature. Infrared spectra and XRD patterns of the products produced at each temperature were recorded. In both mixtures prepared using frit and batch chemicals to represent the frit, phase formation reactions were completed within the temperature range between 900 and 1000 C. However, residual quartz was still present in glass produced from the mixture with batch chemicals even at 1100 C. Although, the phase composition and structure of the glassy products obtained from both mixtures …
Date:
August 27, 2008
Creator:
Marra, J
Object Type:
Article
System:
The UNT Digital Library
Assembly and Test of a Support Structure for 3.5 m Long Nb3Sn Racetrack Coils.
The LHC Accelerator Research Program (LARP) is currently developing 4 m long Nb{sub 3}Sn quadrupole magnets for a possible upgrade of the LHC Interaction Regions (IR). In order to provide a reliable test bed for the fabrication and test of long Nb{sub 3}Sn coils, LARP has started the development of the long racetrack magnet LRS01. The magnet is composed of two 3.6 m long racetrack coils contained in a support structure based on an aluminum shell pre-tensioned with water-pressurized bladders and interference keys. For the phase-one test of the assembly procedure and loading operation, the structure was pre-stressed at room temperature and cooled down to 77 K with instrumented, solid aluminum 'dummy coils'. Mechanical behavior and stress homogeneity were monitored with strain gauges mounted on the shell and the dummy coils. The dummy coils were replaced with reacted and impregnated Nb{sub 3}Sn coils in a second assembly procedure, followed by cool-down to 4.5 K and powered magnet test. This paper reports on the assembly and loading procedures of the support structure as well as the comparison between strain gauge data and 3D model predictions.
Date:
August 27, 2007
Creator:
Ferracin, P.; Ambrosio, G.; Anerella, M.; Caspi, S.; Cheng, D. W.; Felice, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Undulator Production of Polarized Positrons
E-166 at SLAC has demonstrated the feasibilty of production of polarized positrons for the International Linear Collider using a helical undulator to produce polarized photons which are converted in a thin target to polarized positrons. The success of the experim ent has resulted in the choice of this technique for the baseline design of ILC.
Date:
August 27, 2008
Creator:
Bugg, William M.
Object Type:
Report
System:
The UNT Digital Library
LARP Long Nb3Sn Quadrupole Design.
A major milestone for the LHC Accelerator Research Program (LARP) is the test, by the end of 2009, of two 4m-long quadrupole magnets (LQ) wound with Nb{sub 3}Sn conductor. The goal of these magnets is to be a proof of principle that Nb{sub 3}Sn is a viable technology for a possible LHC luminosity upgrade. The design of the LQ is based on the design of the LARP Technological Quadrupoles, presently under development at FNAL and LBNL, with 90-mm aperture and gradient higher than 200 T/m. The design of the first LQ model will be completed by the end of 2007 with the selection of a mechanical design. In this paper we present the coil design addressing some fabrication technology issues, the quench protection study, and three designs of the support structure.
Date:
August 27, 2007
Creator:
Ambrosio, G.; Andreev, N.; Anerella, M.; Barzi, E.; Bossert, R.; Caspi, S. et al.
Object Type:
Article
System:
The UNT Digital Library
The Helium Cooling System and Cold Mass Support System for theMICE Coupling Solenoid
The MICE cooling channel consists of alternating threeabsorber focus coil module (AFC) and two RF coupling coil module (RFCC)where the process of muon cooling and reacceleration occurs. The RFCCmodule comprises a superconducting coupling solenoid mounted around fourconventional conducting 201.25 MHz closed RF cavities and producing up to2.2T magnetic field on the centerline. The coupling coil magnetic fieldis to produce a low muon beam beta function in order to keep the beamwithin the RF cavities. The magnet is to be built using commercialniobium titanium MRI conductors and cooled by pulse tube coolers thatproduce 1.5 W of cooling capacity at 4.2 K each. A self-centering supportsystem is applied for the coupling magnet cold mass support, which isdesigned to carry a longitudinal force up to 500 kN. This report willdescribe the updated design for the MICE coupling magnet. The cold masssupport system and helium cooling system are discussed indetail.
Date:
August 27, 2007
Creator:
Wang, L.; Wu, H.; Li, L. K.; Green, M. A.; Liu, C. S.; Li, L. Y. et al.
Object Type:
Article
System:
The UNT Digital Library