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509 Matching Results
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Transverse momentum and centrality dependence of high-ptnon-photonic electron suppression in Au+Au collisions at $\sqrt{s_{NN}}$= 200 GeV
The STAR collaboration at RHIC reports measurements of theinclusive yield of non-photonic electrons, which arise dominantly fromsemi-leptonic decays of heavy flavor mesons, over a broad range oftransverse momenta (1.2<pt<10 gevc) in pp, dAu, and AuAucollisions at sqrt sNN = 200 GeV. The non-photonic electron yieldexhibits unexpectedly large suppression in central AuAu collisions athigh pt, suggesting substantial heavy quark energy loss at RHIC. Thecentrality and \pt dependences of the suppression provide constraints ontheoretical models of suppression.
Date:
July 11, 2006
Creator:
Abelev, B. I.; Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D. et al.
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 22, No. 19, Ed. 1 Thursday, May 11, 2006
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
May 11, 2006
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
The Efficient Windows Collaborative: Final Report
The Efficient Windows Collaborative (EWC) is a coalition of manufacturers, component suppliers, government agencies, research institutions, and others who partner to expand the market for energy efficient window products. Funded through a cooperative agreement with the U.S. Department of Energy, the EWC provides education, communication and outreach in order to transform the residential window market to 70% energy efficient products by 2005. Implementation of the EWC is managed by the Alliance to Save Energy, with support from the University of Minnesota and Lawrence Berkeley National Laboratory.
Date:
August 11, 2006
Creator:
Alliance to Save Energy (U.S.)
Object Type:
Report
System:
The UNT Digital Library
Pages of the United States Congress: History, Background Information, and Proposals for Change
None
Date:
October 11, 2006
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Perrhenate and Pertechnetate Behavior on Iron and Sulfiur-Bearing Compounds
None
Date:
December 11, 2006
Creator:
Anderson, B. E.
Object Type:
Presentation
System:
The UNT Digital Library
State Compensation: A No-cost Scheme for Scalable Failure Recovery in Tree-based Overlay Networks
Tree-based overlay networks (TB{bar O}Ns) have become important for scalable data multicast and aggregation. This infrastructure's generality has lead to widespread usage in large scale and widely distributed environments--environments in which reliability must be addressed. This paper presents state compensation, a novel reliability concept for TB{bar O}N environments that avoids explicit state replication (such as checkpoints) for failure recovery by leveraging general properties of TB{bar O}N computations that allow computational state from non-failed processes to compensate for state lost from failed ones. In this paper, we present our state compensation mechanisms, prove sufficient properties of distributed computations that make these mechanisms feasible and show how to derive computation-specific recovery primitives from these properties. We also present a case study of the recovery process. The result is a general TB{bar O}N recovery model that requires no additional storage, network, or computational resources during normal operation.
Date:
July 11, 2006
Creator:
Arnold, D C & Miller, B P
Object Type:
Article
System:
The UNT Digital Library
Measurements of $\Lambda^+_c$ Branching Fractions of Cabibbo-Suppressed Decay Modes involving $\Lambda$ and $\Sigma^{0}$
None
Date:
January 11, 2006
Creator:
Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.
Object Type:
Report
System:
The UNT Digital Library
Linear-scaling evaluation of the local energy in quantum MonteCarlo
For atomic and molecular quantum Monte Carlo calculations, most of the computational effort is spent in the evaluation of the local energy. We describe a scheme for reducing the computational cost of the evaluation of the Slater determinants and correlation function for the correlated molecular orbital (CMO) ansatz. A sparse representation of the Slater determinants makes possible efficient evaluation of molecular orbitals. A modification to the scaled distance function facilitates a linear scaling implementation of the Schmidt-Moskowitz-Boys-Handy (SMBH) correlation function that preserves the efficient matrix multiplication structure of the SMBH function. For the evaluation of the local energy, these two methods lead to asymptotic linear scaling with respect to the molecule size.
Date:
February 11, 2006
Creator:
Austin, Brian; Aspuru-Guzik, Alan; Salomon-Ferrer, Romelia & Lester Jr., William A.
Object Type:
Article
System:
The UNT Digital Library
Energy Policy: Conceptual Framework and Continuing Issues
In the spring of 2006, crude oil prices were exceeding $70/barrel (bbl) in response to tight markets and uncertainty over the security of world oil supply. A number of developments have placed additional pressure on world markets, including Hurricanes Katrina and Rita (in late August and late September 2005), the phaseout of the gasoline additive methyl tertiary butyl ether (MTBE) and a renewable fuels mandate, and a continuing high and worldwide demand for oil. Energy policy issues for continuing interest include opening up the Arctic National Wildlife Refuge (ANWR) for leasing; Corporate Average Fuel Economy Standards (CAFE) for passenger vehicles; improving U.S. energy infrastructure, including pipelines and refineries; seeking effective means to promote energy conservation using currently available technologies, and developing new technologies and alternative fuels.
Date:
May 11, 2006
Creator:
Bamberger, Robert
Object Type:
Report
System:
The UNT Digital Library
U.S. Aims for Zero-Energy: Support for PV on New Homes
As a market segment for solar photovoltaic (PV) adoption, new homes have a number of attractive attributes. Homebuyers can easily roll the cost of the PV system into their mortgage and, with rebates or other financial incentives, potentially realize an immediate net positive cash flow from the investment. PV system performance can be optimized by taking roof orientation, shading, and other structural factors into account in the design of new homes. Building-integrated photovoltaics (BIPV), which are subject to fewer aesthetic concerns than traditional, rack-mounted systems, are well-suited to new construction applications. In large new residential developments, costs can be reduced through bulk purchases and scale economies in system design and installation. Finally, the ability to install PV as a standard feature in new developments - like common household appliances - creates an opportunity to circumvent the high transaction costs and other barriers typically confronted when each individual homeowner must make a distinct PV purchase decision.
Date:
May 11, 2006
Creator:
Barbose, Galen; Wiser, Ryan & Bolinger, Mark
Object Type:
Article
System:
The UNT Digital Library
Spin Rotation and Energy Compression in the ILC Linac-to-Ring Positron Beamline
Linac-to Ring beamline for positron beam injection into damping ring at the energy of 5 GeV is considered. The beamline performs spin rotation and energy compression of the positron beam extracted from the booster linac. The lattice includes four 90{sup o} phase-advance FODO cells with bending magnets placed between them, a solenoid, and the RF structure. An analytical treatment of the beamline is performed. Basic parameters and optimal configuration are discussed.
Date:
August 11, 2006
Creator:
Batygin, Y.K.
Object Type:
Report
System:
The UNT Digital Library
Environmental Protection Agency: FY2007 Appropriations Highlights
None
Date:
July 11, 2006
Creator:
Bearden, David M.
Object Type:
Report
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 has also been disagreement over the potential impacts of broader exemptions on environmental quality. This report outlines this issue and relevant legislation in detail.
Date:
July 11, 2006
Creator:
Bearden, David M.
Object Type:
Report
System:
The UNT Digital Library
National Environmental Education Act of 1990: Overview, Implementation, and Reauthorization Issues
This report presents an overview of the National Environmental Education Act of 1990, discusses appropriations, examines the Environmental Protection Agency's (EPA's) implementation of the act, and analyzes reauthorization issues relevant to legislation introduced in recent Congresses.
Date:
December 11, 2006
Creator:
Bearden, David M.
Object Type:
Report
System:
The UNT Digital Library
National Environmental Education Act of 1990: Overview, Implementation, and Reauthorization Issues
None
Date:
July 11, 2006
Creator:
Bearden, David M.
Object Type:
Report
System:
The UNT Digital Library
Environmental Protection Agency: FY2007 Appropriations Highlights
None
Date:
December 11, 2006
Creator:
Bearden, David M. & Esworthy, Robert
Object Type:
Report
System:
The UNT Digital Library
Technical Work Plan for: Fracture and Lithophysal Studies
The primary objective of the work scope described in this technical work plan (TWP) is to enhance the descriptions of fracture and lithophysal parameters for the repository host horizon (RHH) over the repository footprint utilizing a predictive model. This work is planned to address U.S. Nuclear Regulatory Commission (NRC) additional information needs (AINs) associated with the Structural Deformation and Seismicity (SDS) Key Technical Issues (KTI) agreement SDS 3.03 (Schlueter 2000 [DIRS 166615]). The results of the planned work are expected to enhance the technical basis and confirm the results of the fracture analyses presented in ''Drift Degradation Analysis'' (BSC 2004 [DIRS 166107], Section 6.1.6). This model is not intended to provide an alternative for the unsaturated zone and saturated zone flow and transport models currently used by the Yucca Mountain Project (YMP). Nor are the outputs of this model intended to address the SDS 3.03 AINs related to the unsaturated zone and saturated zone flow and transport models.
Date:
September 11, 2006
Creator:
Bechtel SAIC Company, LLC
Object Type:
Report
System:
The UNT Digital Library
The Grandview Tribune (Grandview, Tex.), Vol. 111, No. 48, Ed. 1 Friday, August 11, 2006
Weekly newspaper from Grandview, Texas that includes local, state, and national news along with advertising.
Date:
August 11, 2006
Creator:
Beck-Adams, Candie
Object Type:
Newspaper
System:
The Portal to Texas History
Farm and Food Support Under USDA’s Section 32 Program
This report provides information about the Farm and Food Support Under USDA’s Section 32 Program which is funded by a permanent appropriation of 30% of previous year' s custom receipts to support the farm sector.
Date:
August 11, 2006
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
Mutations that Cause Human Disease: A Computational/Experimental Approach
International genome sequencing projects have produced billions of nucleotides (letters) of DNA sequence data, including the complete genome sequences of 74 organisms. These genome sequences have created many new scientific opportunities, including the ability to identify sequence variations among individuals within a species. These genetic differences, which are known as single nucleotide polymorphisms (SNPs), are particularly important in understanding the genetic basis for disease susceptibility. Since the report of the complete human genome sequence, over two million human SNPs have been identified, including a large-scale comparison of an entire chromosome from twenty individuals. Of the protein coding SNPs (cSNPs), approximately half leads to a single amino acid change in the encoded protein (non-synonymous coding SNPs). Most of these changes are functionally silent, while the remainder negatively impact the protein and sometimes cause human disease. To date, over 550 SNPs have been found to cause single locus (monogenic) diseases and many others have been associated with polygenic diseases. SNPs have been linked to specific human diseases, including late-onset Parkinson disease, autism, rheumatoid arthritis and cancer. The ability to predict accurately the effects of these SNPs on protein function would represent a major advance toward understanding these diseases. To date several attempts …
Date:
January 11, 2006
Creator:
Beernink, P; Barsky, D & Pesavento, B
Object Type:
Report
System:
The UNT Digital Library
Gasoline Prices: New Legislation and Proposals
This report discusses legislation and proposals regarding prices of gasoline. Policy options, oil-related legislation, and crude oil prices are among topics covered in this report.
Date:
May 11, 2006
Creator:
Behrens, Carl E. & Glover, Carol
Object Type:
Report
System:
The UNT Digital Library
New Developments in Measurements of CP Violation
We present several alternative techniques used by the BABAR Collaboration in order to measure the Unitarity Triangle angle {gamma}. We also present the results of two searches designed to improve the measurements of sin(2{beta}) using penguin B decay modes by reducing the hadronic corrections uncertainties.
Date:
August 11, 2006
Creator:
Benelli, Gabriele
Object Type:
Article
System:
The UNT Digital Library
Intelligence Issues for Congress
To address the challenges facing the U.S. Intelligence Community in the 21st Century, Congressional and executive branch initiatives have sought to improve coordination among the different agencies and to encourage better analysis. In December 2004, the Intelligence Reform and Terrorism Prevention Act (P.L. 108-458) was signed, providing for a Director of National Intelligence (DNI) with substantial authorities to manage the national intelligence effort. The legislation calls for a separate Director of the Central Intelligence Agency.
Date:
January 11, 2006
Creator:
Best, Richard A., Jr.
Object Type:
Report
System:
The UNT Digital Library
A Modeling Study Evaluating the Thermal-Hydrological Conditions In and Near Waste Emplacement Tunnels At Yucca Mountain
In heated tunnels such as those designated for emplacement of radioactive waste at the proposed geologic repository at Yucca Mountain, temperature gradients cause natural convection processes that may significantly influence the moisture conditions in the tunnels and in the surrounding fractured rock. Large-scale convection cells in the heated tunnels would provide an effective mechanism for turbulent mixing and axial transport of vapor generated from evaporation of pore water in the nearby formation. As a result, vapor would be transported from the elevated-temperature sections of the tunnels into cool end sections (where no waste is emplaced), would condense there, and subsequently drain into underlying rock units. To study these processes, we have developed a new simulation method that couples existing tools for simulating thermal-hydrological (TH) conditions in the fractured formation with a module that approximates turbulent natural convection in heated emplacement drifts. The new method simultaneously handles (1) the flow and energy transport processes in the fractured rock, (2) the flow and energy transport processes in the cavity, and (3) the heat and mass exchange at the rock-cavity interface. An application is presented studying the future TH conditions within and near a representative waste emplacement tunnel at Yucca Mountain. Particular focus …
Date:
October 11, 2006
Creator:
Birkholzer, J.T.; Halecky, N.; Webb, S.W>; Peterson, P.F. & Bodvarsson, G.S.
Object Type:
Article
System:
The UNT Digital Library