Collection
Office of Scientific & Technical Information Technical Reports
218
Congressional Research Service Reports
143
Defense Base Closure and Realignment Commission
132
End of Term Publications
50
Texas Patents
42
Texas Attorney General Opinions
31
Technical Report Archive and Image Library
24
Government Accountability Office Reports
21
National Advisory Committee for Aeronautics Collection
14
Texas Register
10
7 More
Serial/Series Title
Country
States
Decade
Month
Day
Language
685 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
685
next
An Improved Direct Measurement of Leptonic Coupling Asymmetries with Polarized Z{sup 0}'s
We report new direct measurements of the Z{sup 0}-lepton coupling asymmetry parameters A{sub e}, A{sub {mu}} and A{sub r}, with polarized Z{sup 0}'s collected by the SLD detector at the SLAC Linear Collider. The parameters are extracted from the measurement of the left-right-forward-backward asymmetries for each lepton species. The 1996, 1997 and 1998 SLD runs are included in this analysis and combined with published data from the 1993-95 runs. Preliminary results are A{sub e} = 0.1558 {+-} 0.0064, A{sub {mu}} = 0.137 {+-} 0.016 and A{sub {tau}} = 0.142 {+-} 0.016. If lepton universality is assumed, a combined asymmetry parameter A{sub l} = 0.1523 {+-} 0.0057 results. This translates into an effective weak mixing angle sin{sup 2} {theta}{sub W}{sup eff} = 0.23085 {+-} 0.00073 at the Z{sup 0} resonance.
Date:
August 3, 1999
Creator:
Abe, Toshinori
Object Type:
Report
System:
The UNT Digital Library
Hydrogen Safety Training for Researchers
None
Date:
August 3, 2010
Creator:
Aceves, S.; Petitpas, G.; Ross, T. & Switzer, V.
Object Type:
Report
System:
The UNT Digital Library
SNAP re-entry orbit; comments on the atmospheric entry and discussion of a proposed test
In order to evaluate entry into the atmosphere of an oblate (equatorial bulge) earth a standard atmosphere was used in conjunction with the standard rotating oblate spheroid. The density variation encountered in any one polar orbit around the earth will vary by about a factor of ten, due to oblateness. Therefore, the important effects on the re-entry trajectory are atmospheric density and oblateness of the earth. The SNAP configuration burn up characteristics will differ considerably between the steep (6/sup 0/) entry of the NASA Scout test and the orbital decay trajectory. However, the test can verify heat transfer rates on the actual configuration, and by proper calculation of material response, the actual decay breakup prediction can be improved.
Date:
August 3, 1962
Creator:
Ackermann, W. O.; Arthur, P. D. & Nelson, D. K.
Object Type:
Report
System:
The UNT Digital Library
Lebanon: Background and U.S. Relations
This report provides an overview of Lebanese politics, recent events in Lebanon, and current issues in U.S.-Lebanon relations.
Date:
August 3, 2010
Creator:
Addis, Casey L.
Object Type:
Report
System:
The UNT Digital Library
Prototyping Energy Efficient Thermo-Magnetic & Induction Hardening for Heat Treat & Net Shape Forming Applications
Within this project, Eaton undertook the task of bringing about significant impact with respect to sustainability. One of the major goals for the Department of Energy is to achieve energy savings with a corresponding reduction in carbon foot print. The use of a coupled induction heat treatment with high magnetic field heat treatment makes possible not only improved performance alloys, but with faster processing times and lower processing energy, as well. With this technology, substitution of lower cost alloys for more exotic alloys became a possibility; microstructure could be tailored for improved magnetic properties or wear resistance or mechanical performance, as needed. A prototype commercial unit has been developed to conduct processing of materials. Testing of this equipment has been conducted and results demonstrate the feasibility for industrial commercialization.
Date:
August 3, 2012
Creator:
Ahmad, Aquil
Object Type:
Report
System:
The UNT Digital Library
Performance characteristics of an underslung vertical-wedge inlet with porous suction at Mach numbers of 0.63 and 1.5 to 2.0
Performance characteristics of underslung vertical wedge inlet with porous suction at Mach numbers of 0.63 and 1.5 to 2.0.
Date:
August 3, 1956
Creator:
Allen, John L. & Piercy, Thomas G.
Object Type:
Report
System:
The UNT Digital Library
Performance characteristics of an underslung vertical-wedge inlet with porous suction at Mach numbers of 0.63 and 1.5 to 2.0
Report presenting testing of the performance of a ventrally mounted inlet having a variable-angle vertical-wedge compression surface determined at several Mach numbers for angles of attack, angles of yaw, and wedge angle. A solid wedge and wedges with two different porosities were tested. Results regarding the inlet flow-field survey, comparison of inlet configurations, performance of the inlet, effect of free-stream Mach number at angle of attack of 2 degrees, effect of angles of attack and yaw, diffuser total-pressure distortion, fuselage boundary-layer-removal scoop, and effective thrust comparison are provided.
Date:
August 3, 1956
Creator:
Allen, John L. & Piercy, Thomas G.
Object Type:
Report
System:
The UNT Digital Library
Connecting Reionization to the Local Universe
We present results of combined N-body and three-dimensional reionization calculations to determine the relationship between reionization history and local environment in a volume 1 Gpc h{sup -1} across and a resolution of about 1 Mpc. We resolve the formation of about 2 x 10{sup 6} halos of mass greater than {approx} 10{sup 12} M{sub {circle_dot}} at z = 0, allowing us to determine the relationship between halo mass and reionization epoch for galaxies and clusters. For our fiducial reionization model, in which reionization begins at z {approx} 15 and ends by z {approx} 6, we find a strong bias for cluster-size halos to be in the regions which reionized first, at redshifts 10 < z < 15. Consequently, material in clusters was reionized within relatively small regions, on the order of a few Mpc, implying that all clusters in our calculation were reionized by their own progenitors. Milky Way mass halos were on average reionized later and by larger regions, with a distribution most similar to the global one, indicating that low mass halos are nearly uncorrelated with reionization when only their mass is taken as a prior. On average, we find that most halos with mass less than 10{sup …
Date:
August 3, 2009
Creator:
Alvarez, Marcelo A.; Busha, Michael; Abel, Tom; Wechsler, Risa H. & /KIPAC, Menlo Park
Object Type:
Article
System:
The UNT Digital Library
High power impulse magnetron sputtering: Current-voltage-timecharacteristics indicate the onset of sustained self-sputtering
The commonly used current-voltage characteristics are foundinadequate for describing the pulsed nature of the high power impulsemagnetron sputtering (HIPIMS) discharge, rather, the description needs tobe expanded to current-voltage-time characteristics for each initial gaspressure. Using different target materials (Cu, Ti, Nb, C, W, Al, Cr) anda pulsed constant-voltage supply it is shown that the HIPIMS dischargestypically exhibit an initial pressure dependent current peak followed bya second phase that is power and material dependent. This suggests thatthe initial phase of a HIPIMS discharge pulse is dominated by gas ionswhereas the later phase has a strong contribution from self-sputtering.For some materials the discharge switches into a mode of sustainedself-sputtering. The very large differences between materials cannot beascribed to the different sputter yields but they indicate thatgeneration and trapping ofsecondary electrons plays a major role forcurrent-voltage-time characteristics. In particular, it is argued thatthe sustained self-sputtering phase is associated with thegeneration ofmultiply charged ions because only they can cause potential emission ofsecondary electrons whereas the yield caused by singly charged metal ionsis negligibly small.
Date:
August 3, 2007
Creator:
Anders, Andre; Andersson, Joakim & Ehiasarian, Arutiun
Object Type:
Article
System:
The UNT Digital Library
Broadband Internet Access: Background and Issues
This report is about the Broadband Internet Access, The Background, and analysis of Broadband. It's importance, and about broadband technologies like Cable, Satellite and other technologies. The status of Broadband Deployment and Development Issues.
Date:
August 3, 2005
Creator:
Angele. A
Object Type:
Report
System:
The UNT Digital Library
Coarse Aperture Study for the Window Frame Dipoles in RHIC
This report describes Coarse Aperture Study for the Window Frame Dipoles in RHIC.
Date:
August 3, 1984
Creator:
Antillon, Armando
Object Type:
Report
System:
The UNT Digital Library
Effective-Porosity and Dual-Porosity Approaches to Solute Transport in Fractured Tuff of the Saturated Zone at Yucca Mountain: Implications for Repository Performance Assessment
None
Date:
August 3, 2000
Creator:
Arnold, Bill W.; Zhang, Hubao & Parsons, Alva M.
Object Type:
Article
System:
The UNT Digital Library
Head Rest for Chairs.
Patent for a new and improved head-rest for chairs. This design consists in "[a] head-rest for chairs, comprising a top support . . . a plate fixed thereto and provided with a socket and guides . . . a ball, fitting socket, and retaining-jaws held in the guide of the plate around the ball" (lines 81-86).
Date:
August 3, 1886
Creator:
Ashby, Daniel S.
Object Type:
Patent
System:
The Portal to Texas History
Atmospheric Radiation Measurement Program Facilities Newsletter, July 2000.
Monthly newsletter discussing news and activities related to the Atmospheric Radiation Measurement Program, articles about weather and atmospheric phenomena, and other related topics.
Date:
August 3, 2000
Creator:
Atmospheric Radiation Measurement Program (U.S.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Observation and Polarization Measurement of B0 --> a1(1260) a1(1260)- Decay
The authors present measurements of the branching fraction {Beta} and longitudinal polarization fraction f{sub L} for B{sup 0} {yields} a{sub 1}(1260){sup +} a{sub 1}(1260){sup -} decays, with a{sub 1}(1260){sup {+-}} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup {+-}}. The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465 x 10{sup 6} produced B{bar B} pairs. They measure {Beta}(B{sup 0} {yields} a{sub 1}(1260){sup +} a{sub 1}(1260){sup -}) x [{Beta}(a{sub 1}(1260){sup +} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup +})]{sup 2} = (11.8 {+-} 2.6 {+-} 1.6) x 10{sup -6} and f{sub L} = 0.31 {+-} 0.22 {+-} 0.10, where the first uncertainty is statistical and the second systematic. The decay mode is measured with a significance of 5.0 standard deviations including systematic uncertainties.
Date:
August 3, 2009
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the Branching Fraction and Lambda-bar Polarization in B0 -> Lambda-par p pi-
We present a measurement of the B{sup 0} {yields} {bar {Lambda}}p{pi}{sup -} branching fraction performed using the BABAR detector at the PEP-II asymmetric e{sup +}e{sup -} collider. Based on a sample of 467 x 10{sup 6} B{bar B} pairs we measure {Beta}(B{sup 0} {yields} {bar {Lambda}}p{pi}{sup -}) [3.07 {+-} 0.31(stat.) {+-} 0.23(syst.)] x 10{sup -6}. The measured differential spectrum as a function of the dibaryon invariant mass m({bar {Lambda}}p) shows a near-threshold enhancement similar to that observed in other baryonic B decays. We study the {bar {Lambda}} polarization as a function of {bar {Lambda}} energy in the B{sup 0} rest frame (E*{sub {bar {Lambda}}}) and compare it with theoretical expectations of fully longitudinally right-polarized {bar {Lambda}} at large E*{sub {bar {Lambda}}}.
Date:
August 3, 2009
Creator:
Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X. et al.
Object Type:
Article
System:
The UNT Digital Library
The Debt Limit: History and Recent Increases
This report discusses how the total debt of the federal government can increase, an historical overview of debt limits, and how the current economic slowdown has led to higher deficits and thereby a series of debt limit increases, as well as legislation related to these increases.
Date:
August 3, 2011
Creator:
Austin, D. Andrew & Levit, Mindy R.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Fabry-Perot Velocimeter Records
Program demonstration and user instructions are presented for FabryVB5. This computer program was created for use in analyzing Fabry-Perot interferometer records that detail the velocity time histories of fast moving surfaces. Graphical curves representing peak fringe positions and fiducial timing dots are extracted from a digitized film record or from a CCD digital image. An analysis is demonstrated on a sample velocimeter record along with some mathematical formula and routine operations. Routines used to analyze calibration records on streak camera distortions are illustrated in an appendix. This is a Microsoft Visual Basic{trademark} version for the PC.
Date:
August 3, 2001
Creator:
Avara, G.
Object Type:
Report
System:
The UNT Digital Library
Effect of Single Heater Test on Intact Rock Properties at Yucca Mountain, Nevada
None
Date:
August 3, 2000
Creator:
BRODSKY,NANCY S. & BARKER,GLENN T.
Object Type:
Article
System:
The UNT Digital Library
Thermal Conductivity as a Function of Saturation for Welded and Nonwelded Tuff
None
Date:
August 3, 2000
Creator:
BRODSKY,NANCY S. & BARKER,GLENN T.
Object Type:
Article
System:
The UNT Digital Library
Clean Energy Technologies: A Preliminary Inventory of the Potential for Electricity Generation
The nation's power system is facing a diverse and broad set of challenges. These range from restructuring and increased competitiveness in power production to the need for additional production and distribution capacity to meet demand growth, and demands for increased quality and reliability of power and power supply. In addition, there are growing concerns about emissions from fossil fuel powered generation units and generators are seeking methods to reduce the CO{sub 2} emission intensity of power generation. Although these challenges may create uncertainty within the financial and electricity supply markets, they also offer the potential to explore new opportunities to support the accelerated deployment of cleaner and cost-effective technologies to meet such challenges. The federal government and various state governments, for example, support the development of a sustainable electricity infrastructure. As part of this policy, there are a variety of programs to support the development of ''cleaner'' technologies such as combined heat and power (CHP, or cogeneration) and renewable energy technologies. Energy from renewable energy sources, such as solar, wind, hydro, and biomass, are considered carbon-neutral energy technologies. The production of renewable energy creates no incremental increase in fossil fuel consumption and CO{sub 2} emissions. Electricity and thermal energy production …
Date:
August 3, 2005
Creator:
Bailey, Owen & Worrell, Ernst
Object Type:
Report
System:
The UNT Digital Library
Smoothing of mirror substrates by thin-film deposition
Superpolished optical flats with high spatial frequency roughness below 0.1 nm have been commercially available for years. However, it is much more difficult to obtain figured optics of similar quality. We have obtained and tested the finish of figured optics from different vendors by atomic force microscopy and optical profilometry and have investigated how the substrate quality can be improved by the deposition of thin films. We have determined the growth parameters of several thin-film structures. From these parameters we can determine how the surface topography of a coated mirror differs from that of the substrate, select the best thin-film structure, and predict the possible improvement. Keywords: Smoothing films, multilayer coatings, finish of mirror substrates
Date:
August 3, 1999
Creator:
Baker, S; Parra, E; Spiller, E & Tarrio, C
Object Type:
Article
System:
The UNT Digital Library
STOPPING POWER AND ENERGY FOR ION PAIR PRODUCTION FOR 340 MEVPROTONS
The relative stopping powers for 300 Mev protons of H, Li, Be, C, Al, Fe, Cu, Ag, Sn, W, Pb, and U have been measured. The results are shown in Table I. The energy spent per ion-pair production in the gases H{sub 2}, He, N{sub 2}, O{sub 2}, and A at 340 Mev proton energy has also been measured. The results are shown in Table II.
Date:
August 3, 1950
Creator:
Bakker, C.J. & Segre, E.
Object Type:
Report
System:
The UNT Digital Library
Authority of a President to Modify or Eliminate a National Monument
President Clinton created a number of new national monuments, using authority given the President under the Antiquities Act of 1906. Many of the designations were controversial and renewed discussion of that Act and whether a President can modify or eliminate a Presidentially created national monument. This report examines that question.
Date:
August 3, 2000
Creator:
Baldwin, Pamela
Object Type:
Report
System:
The UNT Digital Library