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1,919 Matching Results
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Betatron motion with coupling of horizontal and vertical degrees of freedom
Presently, there are two most frequently used parameterizations of linear x-y coupled motion used in the accelerator physics. They are the Edwards-Teng and Mais-Ripken parameterizations. The article is devoted to an analysis of close relationship between the two representations, thus adding a clarity to their physical meaning. It also discusses the relationship between the eigen-vectors, the beta-functions, second order moments and the bilinear form representing the particle ellipsoid in the 4D phase space. Then, it consideres a further development of Mais-Ripken parameteresation where the particle motion is described by 10 parameters: four beta-functions, four alpha-functions and two betatron phase advances. In comparison with Edwards-Teng parameterization the chosen parametrization has an advantage that it works equally well for analysis of coupled betatron motion in circular accelerators and in transfer lines. Considered relationship between second order moments, eigen-vectors and beta-functions can be useful in interpreting tracking results and experimental data. As an example, the developed formalizm is applied to the FNAL electron cooler and Derbenev's vertex-to-plane adapter.
Date:
September 1, 2010
Creator:
Lebedev, V. A. & Bogacz, S. A.
Object Type:
Article
System:
The UNT Digital Library
A bio-synthetic interface for discovery of viral entry mechanisms.
Understanding and defending against pathogenic viruses is an important public health and biodefense challenge. The focus of our LDRD project has been to uncover the mechanisms enveloped viruses use to identify and invade host cells. We have constructed interfaces between viral particles and synthetic lipid bilayers. This approach provides a minimal setting for investigating the initial events of host-virus interaction - (i) recognition of, and (ii) entry into the host via membrane fusion. This understanding could enable rational design of therapeutics that block viral entry as well as future construction of synthetic, non-proliferating sensors that detect live virus in the environment. We have observed fusion between synthetic lipid vesicles and Vesicular Stomatitis virus particles, and we have observed interactions between Nipah virus-like particles and supported lipid bilayers and giant unilamellar vesicles.
Date:
September 1, 2010
Creator:
Gutzler, Mike; Maar, Dianna; Negrete, Oscar; Hayden, Carl C.; Sasaki, Darryl Yoshio; Stachowiak, Jeanne C. et al.
Object Type:
Report
System:
The UNT Digital Library
Biofuels energy policy and grain transportation flows: implications for inland waterways and short sea shipping
"This project develops a foundation for analysis of the effects of U.S. bio-fuel energy policy on domestic and international grain flows and patterns."
Date:
September 2010
Creator:
Vedenov, Dmitry V.; Fuller, Stephen W.; Power, Gabriel; Ahmedov, Zafarbek; Vadali, Sharada & Burris, Mark
Object Type:
Report
System:
The Portal to Texas History
Biomolecular transport and separation in nanotubular networks.
Cell membranes are dynamic substrates that achieve a diverse array of functions through multi-scale reconfigurations. We explore the morphological changes that occur upon protein interaction to model membrane systems that induce deformation of their planar structure to yield nanotube assemblies. In the two examples shown in this report we will describe the use of membrane adhesion and particle trajectory to form lipid nanotubes via mechanical stretching, and protein adsorption onto domains and the induction of membrane curvature through steric pressure. Through this work the relationship between membrane bending rigidity, protein affinity, and line tension of phase separated structures were examined and their relationship in biological membranes explored.
Date:
September 1, 2010
Creator:
Stachowiak, Jeanne C.; Stevens, Mark Jackson (Sandia National Laboratories, Albuquerque, NM); Robinson, David B.; Branda, Steven S.; Zendejas, Frank; Meagher, Robert J. et al.
Object Type:
Report
System:
The UNT Digital Library
Booster and AGS transverse emittance during the 2006 and 2009 polarized proton runs
This note is an overview of issues relating to transverse polarized proton emittance in the Booster and AGS. It also compares the transverse emittance during the FY09 polarized proton run with it during the FY06 run as several changes were made for the FY09 run in an attempt to reduce the transverse emittance coming out of the AGS. The FY06 run is used for comparison because it was relatively long, and it's believed that the performance of the injectors for polarized protons, up until FY09, was best during that run. Over the shutdown just before the FY09 run work was done in LEBT and MEBT to reduce the emittance coming out of the Linac. Measurements of the beam coming out of Linac1 indicate that the horizontal normalized emittance was reduced from 11.0 {pi} to 4.5 {pi}mm mrad, and that the vertical normalized emittance was reduced from 12.1 {pi} to 5.5 {pi} mm mrad going from FY06 to FY09. There were 2 new types of stripping foil installed in the Booster, called descriptively the 'strip' (No.6) and 'stamp' (No.2) foil, both nominally 100 {micro}g/cm{sup 2}. Both foils are composed of a diamond like material, and designed to reduce the number of …
Date:
September 1, 2010
Creator:
Zeno, K.
Object Type:
Report
System:
The UNT Digital Library
Border Business Indicators, Volume 34, Number 9, September 2010
Monthly publication documenting statistics related to economic information in the Mexico-Texas border areas including types of border crossings, employment, customs revenues, and other related data.
Date:
September 2010
Creator:
Texas Center for Border Economic and Enterprise Development
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Brady Standard-Herald and Heart of Texas News (Brady, Tex.), Ed. 1 Wednesday, September 1, 2010
Weekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
September 1, 2010
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Bs decays at the Tevatron
The authors present measurements of the branching ratio and of the polarization amplitudes in charmless B{sub s} {yields} {phi}{phi} decays using data corresponding to 2.9 fb{sup -1} of integrated luminosity, collected by the CDF experiment at the Tevatron. The branching ratio in B{sub s} {yields} {phi}{phi} decays is measured relative to the normalization mode B{sub s} {yields} J/{Psi}{phi} be {Beta}(B{sub s} {yields} {phi}{phi})/{Beta}(B{sub s} {yields} J/{Psi}{phi}) = [1.78 {+-} 0.14(stat) {+-} 0.20(syst)] x 10{sup -2}. Using the experimental value of {Beta}(B{sub s} {yields} J/{Psi}{phi}) they determine the B{sub s} {yields} {phi}{phi} branching ratio {Beta}(B{sub s} {yields} {phi}{phi}) = 2.40 {+-} 0.21(stat) {+-} 0.27(syst) {+-} 0.82(BR) x 10{sup -5}. The polarization fractions are measured for the first time in this analysis and found to be: |A{sub 0}|{sup 2} = 0.348 {+-} 0.041(stat) {+-} 0.021(syst); |A{sub {parallel}}|{sup 2} = 0.287 {+-} 0.043(stat) {+-} 0.011(syst); and |A{sub {perpendicular}}|{sup 2} = 0.365 {+-} 0.044(stat) {+-} 0.027(syst).
Date:
September 1, 2010
Creator:
Giurgiu, Gavril
Object Type:
Article
System:
The UNT Digital Library
Building America Best Practices Series Volume 11. Builders Challenge Guide to 40% Whole-House Energy Savings in the Marine Climate
This best practices guide is the eleventh in a series of guides for builders produced by the U.S. Department of Energy’s Building America Program. This guide book is a resource to help builders design and construct homes that are among the most energy-efficient available, while addressing issues such as building durability, indoor air quality, and occupant health, safety, and comfort. With the measures described in this guide, builders in the marine climate (portions of Washington, Oregon, and California) can achieve homes that have whole house energy savings of 40% over the Building America benchmark (a home built to mid-1990s building practices roughly equivalent to the 1993 Model Energy Code) with no added overall costs for consumers. These best practices are based on the results of research and demonstration projects conducted by Building America’s research teams. The guide includes information for managers, designers, marketers, site supervisors, and subcontractors, as well as case studies of builders who are successfully building homes that cut energy use by 40% in the marine climate. This document is available on the web at www.buildingamerica.gov. This report was originally cleared 06-29-2010. This version is Rev 1 cleared in Nov 2010. The only change is the reference to …
Date:
September 1, 2010
Creator:
Baechler, Michael C.; Gilbride, Theresa L.; Hefty, Marye G.; Cole, Pamala C.; Williamson, Jennifer L. & Love, Pat M.
Object Type:
Report
System:
The UNT Digital Library
Catalog of the University of Texas Southwestern School of Health Professions: 2010-2013
Catalog of courses and regulations for the University of Texas Southwestern School of Health Professions, 2010-2013. Index of faculty on page 122.
Date:
September 2010
Creator:
University of Texas Southwestern Medical Center at Dallas
Object Type:
Book
System:
The Portal to Texas History
CAVITY CONTROL ALGORITHM
A digital low level radio frequency (RF) system typically incorporates either a heterodyne or direct sampling technique, followed by fast ADCs, then an FPGA, and finally a transmitting DAC. This universal platform opens up the possibilities for a variety of control algorithm implementations. The foremost concern for an RF control system is cavity field stability, and to meet the required quality of regulation, the chosen control system needs to have sufficient feedback gain. In this paper we will investigate the effectiveness of the regulation for three basic control system algorithms: I&Q (In-phase and Quadrature), Amplitude & Phase and digital SEL (Self Exciting Loop) along with the example of the Jefferson Lab 12 GeV cavity field control system.
Date:
September 1, 2010
Creator:
Plawski, Tomasz & Hovater, Curt
Object Type:
Article
System:
The UNT Digital Library
Challenge problem and milestones for : Nuclear Energy Advanced Modeling and Simulation (NEAMS) waste Integrated Performance and Safety Codes (IPSC).
This report describes the specification of a challenge problem and associated challenge milestones for the Waste Integrated Performance and Safety Codes (IPSC) supporting the U.S. Department of Energy (DOE) Office of Nuclear Energy Advanced Modeling and Simulation (NEAMS) Campaign. The NEAMS challenge problems are designed to demonstrate proof of concept and progress towards IPSC goals. The goal of the Waste IPSC is to develop an integrated suite of modeling and simulation capabilities to quantitatively assess the long-term performance of waste forms in the engineered and geologic environments of a radioactive waste storage or disposal system. The Waste IPSC will provide this simulation capability (1) for a range of disposal concepts, waste form types, engineered repository designs, and geologic settings, (2) for a range of time scales and distances, (3) with appropriate consideration of the inherent uncertainties, and (4) in accordance with robust verification, validation, and software quality requirements. To demonstrate proof of concept and progress towards these goals and requirements, a Waste IPSC challenge problem is specified that includes coupled thermal-hydrologic-chemical-mechanical (THCM) processes that describe (1) the degradation of a borosilicate glass waste form and the corresponding mobilization of radionuclides (i.e., the processes that produce the radionuclide source term), (2) …
Date:
September 1, 2010
Creator:
Freeze, Geoffrey A.; Wang, Yifeng; Howard, Robert; McNeish, Jerry A.; Schultz, Peter Andrew & Arguello, Jose Guadalupe, Jr.
Object Type:
Report
System:
The UNT Digital Library
Characterization of Microbial Communities in Subsurface Nuclear Blast Cavities of the Nevada Test Site
This U.S. Department of Energy (DOE) Environmental Remediation Sciences Project (ERSP) was designed to test fundamental hypotheses concerning the existence and nature of indigenous microbial populations of Nevada Test Site subsurface nuclear test/detonation cavities. Now called Subsurface Biogeochemical Research (SBR), this program’s Exploratory Research (ER) element, which funded this research, is designed to support high risk, high potential reward projects. Here, five cavities (GASCON, CHANCELLOR, NASH, ALEMAN, and ALMENDRO) and one tunnel (U12N) were sampled using bailers or pumps. Molecular and cultivation-based techniques revealed bacterial signatures at five sites (CHANCELLOR may be lifeless). SSU rRNA gene libraries contained diverse and divergent microbial sequences affiliated with known metal- and sulfur-cycling microorganisms, organic compound degraders, microorganisms from deep mines, and bacteria involved in selenate reduction and arsenite oxidation. Close relatives of Desulforudis audaxviator, a microorganism thought to subsist in the terrestrial deep subsurface on H2 and SO42- produced by radiochemical reactions, was detected in the tunnel waters. NTS-specific media formulations were used to culture and quantify nitrate-, sulfate-, iron-reducing, fermentative, and methanogenic microorganisms. Given that redox manipulations mediated by microorganisms can impact the mobility of DOE contaminants, our results should have implications for management strategies at this and other DOE sites.
Date:
September 2010
Creator:
Moser, Duane P.; Bruckner, Jim; Fisher, Jen; Czerwinski, Ken; Russell, Charles E. & Zavarin, Mavrik
Object Type:
Report
System:
The UNT Digital Library
Chemical strategies for die/wafer submicron alignment and bonding.
This late-start LDRD explores chemical strategies that will enable sub-micron alignment accuracy of dies and wafers by exploiting the interfacial energies of chemical ligands. We have micropatterned commensurate features, such as 2-d arrays of micron-sized gold lines on the die to be bonded. Each gold line is functionalized with alkanethiol ligands before the die are brought into contact. The ligand interfacial energy is minimized when the lines on the die are brought into registration, due to favorable interactions between the complementary ligand tails. After registration is achieved, standard bonding techniques are used to create precision permanent bonds. We have computed the alignment forces and torque between two surfaces patterned with arrays of lines or square pads to illustrate how best to maximize the tendency to align. We also discuss complex, aperiodic patterns such as rectilinear pad assemblies, concentric circles, and spirals that point the way towards extremely precise alignment.
Date:
September 1, 2010
Creator:
Martin, James Ellis; Baca, Alicia I.; Chu, Dahwey & Rohwer, Lauren Elizabeth Shea
Object Type:
Report
System:
The UNT Digital Library
Cherokeean Herald (Rusk, Tex.), Vol. 161, No. 28, Ed. 1 Wednesday, September 1, 2010
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
September 1, 2010
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
The Christian Chronicle (Oklahoma City, Okla.), Vol. 67, No. 8, Ed. 1, September 2010
Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date:
September 2010
Creator:
McMillon, Lynn
Object Type:
Newspaper
System:
The Portal to Texas History
Chronopolis and MetaArchive: Preservation Cooperation
This paper will examine ongoing work between two major preservation systems, the Chronopolis Digital Preservation Program, and the MetaArchive Cooperative.
Date:
September 2010
Creator:
Minor, David; Phillips, Mark Edward & Schultz, Matt
Object Type:
Paper
System:
The UNT Digital Library
Clean Air Issues in the 111th Congress
This report provides a brief overview on the issue of climate change as well as other Clean Air Act issues of interest to the 111th Congress.
Date:
September 1, 2010
Creator:
McCarthy, James E.
Object Type:
Report
System:
The UNT Digital Library
Clean Cities' Guide to Alternative Fuel and Advanced Medium- and Heavy-Duty Vehicles (Brochure)
Guide describes the alternative fuel and advanced medium- and heavy-duty vehicles available on the market, including buses, vans, refuse haulers, and more.
Date:
September 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Clean Cities' Guide to Alternative Fuel Commercial Lawn Equipment (Brochure)
Guide explains the different types of alternative fuel commercial mowers and lists the makes and models of the ones available on the market.
Date:
September 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Clean Cities Now, Vol. 14, No. 2, September 2010 (Brochure)
Biannual newsletter focused on the nationwide accomplishments and activities of the Clean Cities program.
Date:
September 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 116, No. 35, Ed. 1 Wednesday, September 1, 2010
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
September 1, 2010
Creator:
Henry, Mark
Object Type:
Newspaper
System:
The Portal to Texas History
Climate Research Roadmap Workshop: Summary Report, May 13-14, 2010
In recognition of the ongoing advances and challenges of climate change research, DOE's Office of Biological and Environmental Research (BER) organized a workshop asking the scientific community to identify the current state of climate science. The goal of the workshop was to determine the research challenges important for developing a predictive understanding of global climate. Participants were asked to focus on interdisciplinary research that capitalized on BER's scientific strengths in Atmospheric System Research, Terrestrial Ecosystem Science, and Climate and Earth System Modeling. Approximately 50 scientists representing these three areas were asked to identify desired outcomes for the next 10 years. Goals were identified for the near (1--3 years), mid (4--7 years), and long term (8--10 years). Discussions were focused by discipline (atmospheric, terrestrial, and modeling) and by latitude (high, temperate, and tropical). In addition, opportunities and needs for integration across disciplines and latitudes were identified with a specific focus on crosscutting challenges and outcomes. BER will use this workshop output to update its strategic plan for climate research.
Date:
September 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Closure Report for Corrective Action Unit 408: Bomblet Target Area Tonopah Test Range (TTR), Nevada, Revision 0
This Closure Report (CR) presents information supporting the closure of Corrective Action Unit (CAU) 408: Bomblet Target Area (TTR), Tonopah Test Range, Nevada. This CR complies with the requirements of the Federal Facility Agreement and Consent Order that was agreed to by the State of Nevada; U.S. Department of Energy (DOE), Environmental Management; U.S. Department of Defense; and DOE, Legacy Management. Corrective Action Unit 408 is located at the Tonopah Test Range, Nevada, and consists of Corrective Action Site (CAS) TA-55-002-TAB2, Bomblet Target Areas. This CAS includes the following seven target areas: • Mid Target • Flightline Bomblet Location • Strategic Air Command (SAC) Target Location 1 • SAC Target Location 2 • South Antelope Lake • Tomahawk Location 1 • Tomahawk Location 2 The purpose of this CR is to provide documentation supporting the completed corrective actions and data confirming that the closure objectives for the CAS within CAU 408 were met. To achieve this, the following actions were performed: • Review the current site conditions, including the concentration and extent of contamination. • Implement any corrective actions necessary to protect human health and the environment. • Properly dispose of corrective action and investigation wastes. • Document Notice of …
Date:
September 1, 2010
Creator:
Krauss, Mark
Object Type:
Report
System:
The UNT Digital Library