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Office of Scientific & Technical Information Technical Reports
3,018
Defense Base Closure and Realignment Commission
578
Congressional Research Service Reports
112
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24
Texas Laws and Resolutions Archive
12
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5
Texas Register
2
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CyberCemetery
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2005 BRAC Commission
578
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20
79th Legislature of Texas
12
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12
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9
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9
109th Congress
7
Small Wind Electric Systems Consumers' Guides
6
Diffusion Coatings for Corrosion-Resistant Components in Coal Gasification Systems Quarterly Report
5
Refractory for Black Liquor Gasifiers Quarterly Report
5
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Reducing the longitudinal emittance of the 8-GeV beam via the rf manipulation in a booster cycle
Bunch rotation will cause the longitudinal emittance growth whenever there are far more A rf stations than B rf stations, or vice versa. An alternate method via optimizing the RFSUM curve in a Booster cycle has been investigated using the ESME simulation. Since the rf manipulation at transition crossing can reduce the longitudinal emittance 31% and the momentum spread 17%, eventually, the rms momentum spread of 2.98 MeV and the longitudinal emittance of 0.061 eV {center_dot} sec with 95% of the beam can be achieved at 8-GeV.
Date:
August 1, 2005
Creator:
Yang, Xi; Lebedev, Valeri A. & Ankenbrandt, Charles M.
Object Type:
Report
System:
The UNT Digital Library
Performance Evaluations of Prototype Houses: Minimum 40% Residential Building Energy Savings Level Habitat for Humanity of Greater Newburgh Liberty Street Project: April 2003--September 2004
Habitat for Humanity International (HfHI) is a nonprofit organization that engages volunteers and would-be homebuyers in programs that emphasize sweat-equity and self-help. Habitat is among the top-ten housing producers in the United States. In collaboration with the HfHI Department of Construction & Environmental Resources, Steven Winter Associates, Inc., (SWA) began working with the Habitat for Humanity of Greater Newburgh (HfHGN) affiliate in Newburgh, New York, in April 2003. Since October 1999, HfHGN has acquired and renovated abandoned houses for an average cost of $45,000 per home. The affiliate serves area families living in overcrowded, substandard housing and spending 50% to 80% of their income on housing. In August 2003, HfHGN began their first new construction project, six row houses located on Liberty Street in Newburgh.
Date:
June 1, 2005
Creator:
Guilbert, R. & Magee, A.
Object Type:
Report
System:
The UNT Digital Library
The Weak lensing bispectrum
Weak gravitational lensing of background galaxies offers an excellent opportunity to study the intervening distribution of matter. While much attention to date has focused on the two-point function of the cosmic shear, the three-point function, the bispectrum, also contains very useful cosmological information. Here, we compute three corrections to the bispectrum which are nominally of the same order as the leading term. We show that the corrections are small, so they can be ignored when analyzing present surveys. However, they will eventually have to be included for accurate parameter estimates from future surveys.
Date:
January 1, 2005
Creator:
Dodelson, Scott & Zhang, Pengjie
Object Type:
Article
System:
The UNT Digital Library
Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in p anti-p collisions at s**(1/2) = 1.8-TeV
We present the first measurement of the A{sub 2} and A{sub 3} angular coefficients of the W boson produced in proton-antiproton collisions. We study W {yields} ev{sub e} and W {yields} {mu}{nu}{sub {mu}} candidate events produced in association with at least one jet at CDF, during Run Ia and Run Ib of the Tevatron at {radical}s = 1.8 TeV. The corresponding integrated luminosity was 110 pb{sup -1}. The jet balances the transverse momentum of the W and introduces QCD effects in W boson production. The extraction of the angular coefficients is achieved through the direct measurement of the azimuthal angle of the charged lepton in the Collins-Soper rest-frame of the W boson. The angular coefficients are measured as a function of the transverse momentum of the W boson. The electron, muon, and combined results are in good agreement with the Standard Model prediction, up to order {alpha}{sub s}{sup 2} in QCD.
Date:
April 1, 2005
Creator:
Acosta, D.; Affolder, Anthony A.; Albrow, M. G.; Ambrose, D.; Amidei, D.; Anikeev, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Di-boson production and SM SUSY Higgs searches at the Tevatron
The discovery of the Higgs boson would be a major success for the Standard Model (SM) and would provide further insights into the electroweak symmetry breaking mechanism. This report contains the latest results from the D0 and CDF Tevatron experiments on searches for the SM Higgs produced from gluon fusion with H {yields} WW, and in association with a W boson. It also includes searches for a supersymmetric Higgs in the b{bar b} and {tau}{sup +}{tau}{sup -} decay channels. The study of di-boson production at the Tevatron is important to understand backgrounds in high mass Higgs searches. It also provides a test of the SM through the measurement of the production cross section and the gauge boson self couplings. This paper includes measurements of the WW, W{gamma}, and WZ production cross sections, as well as limits on the anomalous couplings associated with the WW{gamma} and WWZ interactions. The results are based on sets of up to 320 pb{sup -1} of data collected by the D0 and CDF experiments at the {bar p}p Tevatron collider, running at a center-of-mass energy of 1.96 TeV.
Date:
July 1, 2005
Creator:
Elvira, V. Daniel
Object Type:
Article
System:
The UNT Digital Library
Wind Energy Benefits
Wind energy provides many benefits, including economic and environmental. This two-sided fact sheet succinctly outlines the top ten wind energy benefits and is especially well suited for general audiences.
Date:
April 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Properties of High Efficiency CIGS Thin Film Solar Cells
We present experimental results in three areas. Solar cells with an efficiency of 19% have been fabricated with an absorber bandgap in the range of 1.1-1.2 eV. Properties of solar cells fabricated with and without an undoped ZnO layer were compared. The data show that high efficiency cells can be fabricated without using the high-resistivity or undoped ZnO layer. Properties of CIGS solar cells were fabricated from thin absorbers (1 {micro}m) deposited by the three-stage process and simultaneous co-deposition of all the elements. In both cases, solar cells with efficiencies of 16%-17% are obtained.
Date:
February 1, 2005
Creator:
Ramanathan, K.; Keane, J. & Noufi, R.
Object Type:
Article
System:
The UNT Digital Library
Building America Research is Leading the Way to Zero Energy Homes
During times of peak demand, a near zero energy home generates more power than it uses and reduces power demand on the utility provider. In a Florida study, a prototype near zero energy home outperforms a conventional model by providing most of its own power needs throughout the year.
Date:
May 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Activities and Accomplishments in MY 2004/FY 2005
From vehicle acquisition and credit trading to exemptions and outreach activity, the Annual Report summarizes the State & Alternative Fuel Provider Activity's accomplishments during MY 2004/FY 2005.
Date:
October 1, 2005
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
J.R. Simplot: Burner Upgrade Project Improves Performance and Saves Energy at a Large Food Processing Plant
This DOE Industrial Program case study describes how the J.R. Simplot Company saved energy and money by increasing the efficiency of the steam system in its potato processing plant in Caldwell, Idaho.
Date:
September 1, 2005
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Predicting Human Thermal Comfort in Automobiles
The objects of this report are to: (1) increase national energy security by reducing fuel use for vehicle climate control systems; (2) show/demonstrate technology that can reduce the fuel used by LD vehicles' ancillary systems; and (3) develop tools to evaluate the effectiveness of energy-efficient systems including--comfort, cost, practicality, ease-of-use, and reliability.
Date:
June 1, 2005
Creator:
Rugh, J.; Bharathan, D. & Chaney, L.
Object Type:
Presentation
System:
The UNT Digital Library
Sub-microsecond beam notching at low energy
A technique for creating a burst of 100 ns notches (beam extinctions) in an H{sup -} beam at 454 kHz has been developed at {le} 20 keV utilizing a Magnetron ion source with a slit extraction system and a split extractor. Each half of the extractor is treated as part of a 50 ohm transmission line which can be pulsed at {+-} 700 volts creating a 1400 volt gradient across the extractor. A beam current reduction of better than 95% has been observed at the end of the Fermilab 400 MeV Linac. Notched multi-turn charge-exchange injection into the Booster, a 400 MeV to 8 GeV synchrotron, has been demonstrated with a charge reduction in the resulting beam gap of 83%. Presently, the trailing edge of the notch may be adversely affected by space charge resulting in a beam recovery with two different time constants. Efforts to minimize this effect are discussed.
Date:
September 1, 2005
Creator:
Moehs, D. P.
Object Type:
Article
System:
The UNT Digital Library
Development of a Cummins ISL Natural Gas Engine at 1.4g/bhp-hr NOx + NMHC Using PLUS Technology: Final Report
NREL subcontractor report describes Cummins Westport, Inc.'s development of an 8.9 L natural gas engine (320 hp, 1,000 ft-lb peak torque) with CARB emissions certification of 1.4 g/bhp-hr NOx + NMHC.
Date:
July 1, 2005
Creator:
Kamel, M. M.
Object Type:
Report
System:
The UNT Digital Library
What's New: Spring 2005 Update
Articles focus on subjects of interest to Federal agency fleets covered under EPAct and Executive Order 13149.
Date:
April 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
a-SiGe:H Materials and Devices Deposited by Hot Wire CVD Using a Tantalum Filament Operated at Low Temperature
We report the deposition of improved hydrogenated amorphous silicon germanium (a-SiGe:H) films by the hot wire CVD (HWCVD) technique using a tantalum filament operating at a low temperature. We gauge the material quality of the a-SiGe:H films by comparing infrared, small angle X-ray scattering (SAXS), photocapacitance, and conductivity measurements to earlier results, and fabricate single-junction n-i-p solar cell devices using these i-layers.
Date:
February 1, 2005
Creator:
Mahan, A. H.; Xu, Y.; Gedvilas, L. M.; Reedy, R. C.; Williamson, D. L.; Datta, S. et al.
Object Type:
Article
System:
The UNT Digital Library
Analysis of the Use of Wind Energy to Supplement the Power Needs at McMurdo Station and Amundsen-Scott South Pole Station, Antarctica
This report summarizes an analysis of the inclusion of wind-driven power generation technology into the existing diesel power plants at two U.S. Antarctic research stations, McMurdo and Amundsen-Scott South Pole Station. Staff at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) conducted the analysis. Raytheon Polar Services, which currently holds the private sector support contract for the two research stations, was a major contributor to this report. To conduct the analysis, available data were obtained on the wind resources, power plant conditions, load, and component cost. Whenever possible, we validated the information. We then used NREL's Hybrid2 power system modeling software to analyze the potential and cost of using wind turbine generators at the two aforementioned facilities. Unfortunately, the power systems and energy allocations at McMurdo and South Pole Station are being redeveloped, so it is not possible to validate future fuel use. This report is an initial assessment of the potential use of wind energy and should be followed by further, more detailed analysis if this option is to be considered further.
Date:
May 1, 2005
Creator:
Baring-Gould, I.; Robichaud, R. & McLain, K.
Object Type:
Report
System:
The UNT Digital Library
Fitting the luminosity decay in the Tevatron
This paper explores how to fit the decay of the luminosity in the Tevatron. The standard assumptions of a fixed-lifetime exponential decay are only appropriate for very short time intervals. A ''1/time'' functional form fits well, and is supported by analytical derivations. A more complex form, assuming a time-varying lifetime-like term, also produces good results. Changes in the luminosity can be factored into two phenomena: The luminosity burn-off rate, and the burn-off rate from non-luminosity effects. This is particularly relevant for the antiprotons in the Tevatron. The luminous and the non-luminous burn rate of the antiprotons are shown for Tevatron stores.
Date:
May 1, 2005
Creator:
McCrory, E.; Shiltsev, V.; Slaughter, A. J. & Xiao, A.
Object Type:
Article
System:
The UNT Digital Library
A Simple test for the existence of two accretion modes in active galactic nuclei
By analogy to the different accretion states observed in black-hole X-ray binaries (BHXBs), it appears plausible that accretion disks in active galactic nuclei (AGN) undergo a state transition between a radiatively efficient and inefficient accretion flow. If the radiative efficiency changes at some critical accretion rate, there will be a change in the distribution of black hole masses and bolometric luminosities at the corresponding transition luminosity. To test this prediction, the author considers the joint distribution of AGN black hole masses and bolometric luminosities for a sample taken from the literature. The small number of objects with low Eddington-scaled accretion rates m < 0.01 and black hole masses M{sub BH} < 10{sup 9} M{sub {circle_dot}} constitutes tentative evidence for the existence of such a transition in AGN. Selection effects, in particular those associated with flux-limited samples, systematically exclude objects in particular regions of the (M{sub BH}, L{sub bol}) plane. Therefore, they require particular attention in the analysis of distributions of black hole mass, bolometric luminosity, and derived quantities like the accretion rate. The author suggests further observational tests of the BHXB-AGN unification scheme which are based on the jet domination of the energy output of BHXBs in the hard state, …
Date:
February 1, 2005
Creator:
Jester, Sebastian
Object Type:
Article
System:
The UNT Digital Library
Using star tracks to determine the absolute pointing of the Fluorescence Detector telescopes of the Pierre Auger Observatory
To accurately reconstruct a shower axis from the Fluorescence Detector data it is essential to establish with high precision the absolute pointing of the telescopes. To d that they calculate the absolute pointing of a telescope using sky background data acquired during regular data taking periods. The method is based on the knowledge of bright star's coordinates that provide a reliable and stable coordinate system. it can be used to check the absolute telescope's pointing and its long-term stability during the whole life of the project, estimated in 20 years. They have analyzed background data taken from January to October 2004 to determine the absolute pointing of the 12 telescopes installed both in Los Leones and Coihueco. The method is based on the determination of the mean-time of the variance signal left by a star traversing a PMT's photocathode which is compared with the mean-time obtained by simulating the track of that star on the same pixel.
Date:
May 1, 2005
Creator:
De Donato, Cinzia; Sanchez, Federico; /Milan U. /INFN, Milan; Santander, Marcos; Natl.Tech.U., San Rafael; Camin, Daniel et al.
Object Type:
Article
System:
The UNT Digital Library
Double Pomeron physics at the LHC
The author discusses central exclusive production, also known as Double Pomeron Exchange DIPE, from the ISR through the Tevatron to the LHC. There the author emphasizes the interest of exclusive Higgs and W{sup +}W{sup -}/ZZ production.
Date:
July 1, 2005
Creator:
Albrow, Michael G.
Object Type:
Article
System:
The UNT Digital Library
Advances in the understanding and operations of superconducting colliders
Chromaticity drift during injection is a well-known phenomenon in superconducting colliders, such as the Tevatron, HERA and RHIC. Imperfect compensation of the drift effects can contribute to beam loss and emittance growth. It is caused by the drift of the sextupole component in the dipole magnets due to current redistribution in its superconducting coils. Recently extensive studies of chromaticity drift were conducted at the Tevatron, aiming at the improvement of the luminosity performance in the ongoing run II. These studies included not only beam experiments, but also extensive off-line magnetic measurements on spare Tevatron dipoles. Less known, until recently, is that chromaticity drift is often accompanied by tune and coupling drift. This was recently discovered in the Tevatron. We believe that these effects are the product of systematic beam offset in conjunction with the sextupole drifts (and their compensation in the chromaticity correctors). These discoveries are most relevant to the upcoming LHC, where the drift effects will have even more dramatic consequences given the high beam current. It is therefore not a surprise that CERN has been the source of major advances in the understanding of dynamic effects during the LHC superconducting magnet development. The following will briefly review the …
Date:
May 1, 2005
Creator:
Annala, G.; Bauer, P.; Bottura, L.; Martens, M. A.; Sammut, N.; Velev, G. et al.
Object Type:
Article
System:
The UNT Digital Library
Ferro Corporation: Industrial Energy Assessment Identifies $210,000 in Savings Opportunities for Glaze and Coatings Manufacturer
Industrial Technologies Program's BestPractices case study based on a comprehensive plant assessment conducted at the Ferro Corporation by ITP's Industrial Assessment Center in conjunction with The Society of the Plastics Industry, Inc.
Date:
September 1, 2005
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Beam Diagnosis and Lattice Modeling of the Fermilab Booster
A realistic lattice model is a fundamental basis for the operation of a synchrotron. In this study various beam-based measurements, including orbit response matrix (ORM) and BPM turn-by-turn data are used to verify and calibrate the lattice model of the Fermilab Booster. In the ORM study, despite the strong correlation between the gradient parameters of adjacent magnets which prevents a full determination of the model parameters, an equivalent lattice model is obtained by imposing appropriate constraints. The fitted gradient errors of the focusing magnets are within the design tolerance and the results point to the orbit offsets in the sextupole field as the source of gradient errors. A new method, the independent component analysis (ICA) is introduced to analyze multiple BPM turn-by-turn data taken simultaneously around a synchrotron. This method makes use of the redundancy of the data and the time correlation of the source signals to isolate various components, such as betatron motion and synchrotron motion, from raw BPM data. By extracting clean coherent betatron motion from noisy data and separates out the betatron normal modes when there is linear coupling, the ICA method provides a convenient means to measure the beta functions and betatron phase advances. It also …
Date:
September 1, 2005
Creator:
Huang, Xiaobiao
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Study of the decay asymmetry parameter and CP violation parameter in the Lambda(c)+ ---> Lambda pi+ decay
Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter a{sub {Lambda}{sub c}} in {Lambda}{sub c}{sup +} {yields} {Lambda}{pi}{sup +} decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter {Alpha} {triple_bond} a{sub {Lambda}{sub c}} + a{sub {ovr {Lambda}{sub c}}}/a{sub {Lambda}{sub c}} - a{sub {ovr {Lambda}{sub c}}}. We obtain a{sub {Lambda}{sub c}} = -0.78 {+-} 0.16 {+-} 0.13 and {Alpha} = -0.07 {+-} 0.19 {+-} 0.12 where errors are statistical and systematic.
Date:
September 1, 2005
Creator:
Link, J. M.; Yager, P. M.; /UC, Davis; Anjos, J. C.; Bediaga, I.; Castromonte, C. et al.
Object Type:
Article
System:
The UNT Digital Library