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659 Matching Results
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Rapidity and species dependence of particle production at largetransverse momentum for d+Au collisions at psNN = 200 GeV
We determine rapidity asymmetry in the production of charged pions, protons and anti-protons for large transverse momentum (p{sub T}) for d+Au collisions at {radical}s{sub NN} = 200 GeV. The rapidity asymmetry is defined as the ratio of particle yields at backward rapidity (Au beam direction or -ve rapidity) to those at forward rapidity (d beam direction or +ve rapidity). The identified hadrons are measured in the rapidity regions |y| < 0.5 and 0.5 < |y| < 1.0 for the p{sub T} range 2.5 < p{sub T} < 10 GeV/c. We observe significant rapidity asymmetry for charged pion and proton+anti-proton production in both rapidity regions. The asymmetry is larger for 0.5 < |y| < 1.0 than for |y| < 0.5 and is almost independent of particle type. The measurements are compared to various model predictions employing multiple scattering, energy loss, nuclear shadowing, saturation effects, and recombination, and also to a phenomenological parton model. We find that asymmetries are sensitive to model parameters and show model-preference. The rapidity dependence of {pi}{sup -}/{pi}{sup +} and {bar p}/p ratios in peripheral d+Au and forward neutron-tagged events are used to study the contributions of valence quarks and gluons to particle production at high p{sub T}. …
Date:
December 19, 2006
Creator:
Abelev, B. I.; Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D. et al.
Object Type:
Report
System:
The UNT Digital Library
Final Technical Report ARM DOE Grant #DE-FG02-03ER63520 Parameterizations of Shortwave Radiactive Properties of Broken Clouds from Satellite and Ground-Based Measurements
This study used DOE ARM data and facilities to: 1) study macroscopic properties of continental stratus clouds at SGP and the factors controlling these properties, 2) develop a scientific basis for understanding the pocesses responsible for the formation of boundary layer clouds using ARM observations in conjunction with simple parametric models and LES, and 3) evaluate cumulus cloud characteristics retrieved retrieved from the MMCR operating at TWP-Nauru. In addition we have used high resolution 94 GHz observations of boundary layer clouds and precipitation to: 1)develop techniques for using high temporal resolution Doppler velocities to study large-eddy circulations and turbulence in boundary layer clouds and estimate the limitations of using current and past MMCR data for boundary layer cloud studies, 2) evaluate the capability and limitation of the current MMCR data for estimating reflectivity, vertical velocities, and spectral under low-signal-to-noise conditions associated with weak non-precipitating clouds, 3) develop possible sampling modes for the new MMCR processors to allow for adequate sampling of boundary layer clouds, and 4) retrieve updraft and downdraft structures under precipitating conditions.
Date:
June 19, 2006
Creator:
Albrecht, Bruce, A.
Object Type:
Report
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 21, No. 3, Ed. 1 Thursday, January 19, 2006
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
January 19, 2006
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 21, No. 42, Ed. 1 Thursday, October 19, 2006
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
October 19, 2006
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Beyond Apathy and Rage - Next Steps in Overcoming Race, Part 1
Lecture given Tuesday, September 19, 2006, 2:00 PM at Abilene Christian University: "In many ways, attitudes toward race have changed substantially over the last 40 years. Still, while overt racism is less acceptable, more subtle and unspoken forms of racism still persist. How do we move beneath the surface in matters of race so that God's peace might be reflected in how we treat one another? J. C. Thomas will begin our time together with unforgettable monologues on white apathy and black rage. A panel will respond to the presentations and bring others into the conversation. Finally, a group of ACU faculty and staff will talk about their journey over the past two years to understand one another better."
Date:
September 19, 2006
Creator:
Allen, Bethany; Fleer, David; Greene, Mary; Moore, Steven; Reese, Jeanene P.; Taylor, Jerry et al.
Object Type:
Sound
System:
The Portal to Texas History
Beyond Apathy and Rage - Next Steps in Overcoming Race, Part 2
Lecture given Tuesday, September 19, 2006, 2:00 PM at Abilene Christian University: "In many ways, attitudes toward race have changed substantially over the last 40 years. Still, while overt racism is less acceptable, more subtle and unspoken forms of racism still persist. How do we move beneath the surface in matters of race so that God's peace might be reflected in how we treat one another? J. C. Thomas will begin our time together with unforgettable monologues on white apathy and black rage. A panel will respond to the presentations and bring others into the conversation. Finally, a group of ACU faculty and staff will talk about their journey over the past two years to understand one another better."
Date:
September 19, 2006
Creator:
Allen, Bethany; Fleer, David; Greene, Mary; Moore, Steven; Reese, Jeanene P.; Taylor, Jerry et al.
Object Type:
Sound
System:
The Portal to Texas History
Promotion of Efficient Use of Energy: Final Report
The Department of Energy funded the Alliance to Save Energy to promote the efficient use of energy under a multiyear cooperative agreement. This funding allowed the Alliance to be innovative and flexible in its program development, and to initiate and enhance projects it would otherwise not have been able to pursue. The program period was 1999 through 2004. The mission of the Alliance to Save Energy is to promote energy efficiency domestically and worldwide. The Alliance followed this mission by working closely with consumers, government, policy makers, and energy efficient product and service providers. The projects that were initiated by the Alliance included communication and consumer education, policy analysis and research, the promotion of interaction among the energy efficiency industry, and international energy efficiency programs. The funding from the Department of Energy allowed the Alliance to study new issues in energy efficiency, draw public attention to those issues, and create targeted programs, such as the Efficient Windows Collaborative or the Green Schools program, which now function on their own to promote energy efficiency in important areas.
Date:
January 19, 2006
Creator:
Alliance to Save Energy (U.S.)
Object Type:
Report
System:
The UNT Digital Library
Geant4 Developments And Applications
None
Date:
May 19, 2006
Creator:
Allison, J.; Amako, K.; Apostolakis, J.; Araujo, H.; Dubois, P.A.; Asai, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Pledging Allegiance - The Church and the Nations
Lecture given Tuesday, September 19, 2006, 9:45 AM at Abilene Christian University: "In many ways, the events of 9-11 have challenged our perceptions of the world, including our notions of faith and nation. The relationship between church and nation has long been a topic of discussion among those of the Stone-Campbell tradition. Our panelists will help us think about the issue in light of the world we live in today."
Date:
September 19, 2006
Creator:
Anderson, Lynn; Camp, Lee; Cox, Ronald; Harris, Randy; Spivey, Tim & Young, David
Object Type:
Sound
System:
The Portal to Texas History
Assessing the Effects of Radiation Damage on Ni-base Alloys for the Prometheus Space Reactor System
Ni-base alloys were considered for the Prometheus space reactor pressure vessel with operational parameters of {approx}900 K for 15 years and fluences up to 160 x 10{sup 20} n/cm{sup 2} (E > 0.1 MeV). This paper reviews the effects of irradiation on the behavior of Ni-base alloys and shows that radiation-induced swelling and creep are minor considerations compared to significant embrittlement with neutron ,exposure. While the mechanism responsible for radiation-induced embrittlement is not fully understood, it is likely a combination of helium embrittlement and solute segregation that can be highly dependent on the alloy composition and exposure conditions. Transmutation calculations show that detrimental helium levels would be expected at the end of life for the inner safety rod vessel (thimble) and possibly the outer pressure vessel, primarily from high energy (E > 1 MeV) n,{alpha} reactions with {sup 58}Ni. Helium from {sup 10}B is significant only for the outer vessel due to the proximity of the outer vessel to the Be0 control elements. Recommendations for further assessments of the material behavior and methods to minimize the effects of radiation damage through alloy design are provided.
Date:
January 19, 2006
Creator:
Angeliu, T.
Object Type:
Report
System:
The UNT Digital Library
Seismic Design and Retrofit of Equipment and Piping
None
Date:
April 19, 2006
Creator:
Antaki, George
Object Type:
Article
System:
The UNT Digital Library
Integrity of Pipes and Vessels Subject to Internal Explosions: an overview
None
Date:
April 19, 2006
Creator:
Antaki, George; McKeel, Charles & Pease, Derrick
Object Type:
Article
System:
The UNT Digital Library
Because Last Things Matter - A New Look at the New Heavens and the New Earth
Lecture given Tuesday, September 19, 2006, 9:45 AM at Abilene Christian University: "Do you feel left behind by the "left behind" movement? It is sometimes hared to sort out all the theories about the end times. This class is a look ahead that might encourage you."
Date:
September 19, 2006
Creator:
Atchley, Rick
Object Type:
Sound
System:
The Portal to Texas History
Observation of Decays $B^0\to D_s^{(*)+}\pi^-$ and$B^0\to D_s^{(*)-}K^+$
The authors report the observation of decays B{sup 0} {yields} D{sub s}{sup (*)+} {pi}{sup -} and B{sup 0} {yields} D{sub s}{sup (*)-} K{sup +} in a sample of 230 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} events recorded with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage ring. They measure the branching fractions {Beta}(B{sup 0} {yields} D{sub s}{sup +}{pi}{sup -}) = (1.3 {+-} 0.3(stat) {+-} 0.2(syst)) x 10{sup -5}, {Beta}(B{sup 0} {yields} D{sub s}{sup -}K{sup +}) = (2.5 {+-} 0.4(stat) {+-} 0.4(syst)) x 10{sup -5}, {Beta}(B{sup 0} {yields} D*{sub s}{sup +} {pi}{sup -}) = (2.8 {+-} 0.6(stat) {+-} 0.5 (syst)) x 10{sup -5}, and {Beta}(B{sup 0} {yields} D*{sub s}{sup -} K{sup +}) = (2.0 {+-} 0.5(stat) {+-} 0.4(syst)) x 10{sup -5}. The significance of the measurements to differ from zero are 5, 9, 6, and 5 standard deviations, respectively.
Date:
April 19, 2006
Creator:
Aubert, B.
Object Type:
Report
System:
The UNT Digital Library
Observation of $\Upsilon(4S) decays to$\pi^+pi^-\Upsilon(1S)$ and $\pi^+pi^-\Upsilon(1S)$
The authors present the first measurement of {Upsilon}(4S) decays to {pi}{sup +}{pi}{sup -} {Upsilon}(1S) and {pi}{sup +}{pi}{sup -} {Upsilon}(2S) based on a sample of 230 x 10{sup 6} {Upsilon}(4S) mesons collected with the BABAR detector. They measure the product branching fractions {Beta}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -} {Upsilon}(1S)) x {Beta}({Upsilon}(1S) {yields} {mu}{sup +}{mu}{sup -}) = (2.23 {+-} 0.25{sub stat} {+-} 0.27{sub sys}) x 10{sup -6} and {Beta}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(2S)) x {Beta}({Upsilon}(2S) {yields} {mu}{sup +}{mu}{sup -}) = (1.69 {+-} 0.26{sub stat} {+-} 0.20{sub sys}) x 10{sup -6}, from which they derive the partial widths {Lambda}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -} {Upsilon}(1S)) = (1.8 {+-} 0.4) keV and {Lambda}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(2S)) = (2.7 {+-} 0.8) keV.
Date:
April 19, 2006
Creator:
Aubert, B.
Object Type:
Report
System:
The UNT Digital Library
A Study of the DsJ(2317) and DsJ(2460) Mesons in Inclusive ccbar Production near sqrt(s) = 10.6 GeV
A study of the D*{sub sJ}(2317){sup +} and D{sub sJ}(2460){sup +} mesons in inclusive c{bar c} production is presented using 232 fb{sup -1} of data collected by the BABAR experiment near {radical}s = 10.6 GeV. Final states consisting of a D{sub s}{sup +} meson along with one or more {pi}{sup 0}, {pi}{sup {+-}}, or {gamma} particles are considered. Estimates of the mass and limits on the width are provided for both mesons and for the D{sub s1}(2536){sup +} meson. A search is also performed for neutral and doubly-charged partners of the D*{sub sJ}(2317){sup +} meson.
Date:
April 19, 2006
Creator:
Aubert, B.
Object Type:
Report
System:
The UNT Digital Library
On-Line Coolant Chemistry Analysis
Impurities in the gas coolant of the space nuclear power plant (SNPP) can provide valuable indications of problems in the reactor and an overall view of system health. By monitoring the types and amounts of these impurities, much can be implied regarding the status of the reactor plant. However, a preliminary understanding of the expected impurities is important before evaluating prospective detection and monitoring systems. Currently, a spectroscopy system is judged to hold the greatest promise for monitoring the impurities of interest in the coolant because it minimizes the number of entry and exit points to the plant and provides the ability to detect impurities down to the 1 ppm level.
Date:
July 19, 2006
Creator:
Bachman, LM
Object Type:
Report
System:
The UNT Digital Library
Living in the Reel World - FilmFest 2006: Wisdom From a Christian Professional
Lecture given Tuesday, September 19, 2006, 2:00 PM at Abilene Christian University: "Stephen Bailey, a professional in the media and entertainment industry, spends an afternoon with us reflecting on being a Christian in this highly visible world. This life presents both challenges and opportunities, and those who imagine a future in media and entertainment will benefit from his experience. While geared toward those interested in filmmaking, Stephen's story will inspire all of those who seek to serve God in their professional pursuits."
Date:
September 19, 2006
Creator:
Bailey, Stephen
Object Type:
Sound
System:
The Portal to Texas History
Wakefields of Sub-Picosecond Electron Bunches
We discuss wakefields excited by short bunches in accelerators. In particular, we review some of what has been learned in recent years concerning diffraction wakes, roughness impedance, coherent synchrotron radiation wakes, and the resistive wall wake, focusing on analytical solutions where possible. As examples, we apply formulas for these wakes to various parts of the Linac Coherent Light Source (LCLS) project. The longitudinal accelerator structure wake of the SLAC linac is an important ingredient in the LCLS bunch compression process. Of the wakes in the undulator region, the dominant one is the resistive wall wake of the beam pipe.
Date:
April 19, 2006
Creator:
Bane, Karl L. F.
Object Type:
Article
System:
The UNT Digital Library
Beam Dynamics in a Spectrometer for the Polarized Positron Production Experiment
The proposed experiment E-166 at SLAC is designed to demonstrate the possibility of producing longitudinally polarized positrons from circularly polarized photons to be used in future Linear Collider. The experimental set-up utilizes a low emittance 50 GeV electron beam passing through a helical undulator in the Final Focus Test Beam line of the SLAC accelerator. Circularly polarized photons generated by the electron beam in the undulator hit a target and produce electron-positron pairs. The purpose of the post-target spectrometer is to select the positron beam and to deliver it to a polarimeter whilst keeping the positron beam polarization as high as possible. This paper analyzes positron transmission and polarization in the E-166 spectrometer experiment. The positron transmission has a maximum value of 7% for a positron beam energy of 5.5 MeV, while positron polarization is approximately 60%.
Date:
April 19, 2006
Creator:
Batygin, Yuri K.
Object Type:
Report
System:
The UNT Digital Library
Principal component, varimax rotation and cost analysis of volume effects in rectal bleeding in patients treated with 3D-CRT for prostate cancer
None
Date:
April 19, 2006
Creator:
Bauer, J. D.; Jackson, A.; Skwarchuk, M. & Zelefsky, M.
Object Type:
Article
System:
The UNT Digital Library
Exemptions from Environmental Law for the Department of Defense: An Overview of Congressional Action
Several environmental statutes contain national security exemptions, which the Department of Defense (DOD) can obtain on a case-by-case basis. Since FY2003, DOD has sought broader exemptions that it argues are needed to preserve training capabilities and ensure military readiness. There has been disagreement in Congress over the need for broader exemptions in the absence of data on the overall impact of environmental requirements on training and readiness. There also has been disagreement over the potential impacts of broader exemptions on environmental quality.
Date:
May 19, 2006
Creator:
Bearden, David M.
Object Type:
Report
System:
The UNT Digital Library
The Artist As Priest and Prophet - Cultivating Seeing Souls
Lecture given Tuesday, September 19, 2006, 2:00 PM at Abilene Christian University: "The church cultivates believing souls by answering compelling questions, while the artist cultivates seeing souls by raising compelling images. Is there are conflict, an infidelity, in seeing the artist's dual relationship with the Kingdom and the "world"?"
Date:
September 19, 2006
Creator:
Beaubeaux, Carmen
Object Type:
Sound
System:
The Portal to Texas History
Disgust, Death, Sex, and the Gospel of Judas - Body Ambivalence and the Psychology of the Incarnation
Lecture given Tuesday, September 19, 2006, 3:00 PM at Abilene Christian University: ""And the Word became flesh" is one of our most profound theological commitments, yet Christians have struggled with the implications of a fully embodied Christ. Why? Come hear how dimly understood psychological dynamics conspire to undermine our embrace of the Incarnation and, as a result, inhibit our living out a fully authentic spirituality."
Date:
September 19, 2006
Creator:
Beck, Richard
Object Type:
Sound
System:
The Portal to Texas History