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1,277 Matching Results
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Some Useful Linear Coupling Approximations
N/A
Date:
July 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Kicker Pulse Width Requirements for the Injection of Gold Ions into AGS
N/A
Date:
August 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Rigidity Magnetic Field, and Inflector Voltage Based on Frequency Measurements in Booster
N/A
Date:
December 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Programming the New Sextupole Strings in Booster
N/A
Date:
May 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Beam Based Polarity Check of the Booster Sextupole Strings
N/A
Date:
August 1, 2003
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
The J-TAC (Stephenville, Tex.), Vol. 165, No. 6, Ed. 1 Friday, February 28, 2003
Weekly student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
February 28, 2003
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The J-TAC (Stephenville, Tex.), Vol. 165, No. 2, Ed. 1 Thursday, January 30, 2003
Weekly student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
January 30, 2003
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Booster Fault Study No. 17: Proton Beam on the D6 Septum Magnet
N/A
Date:
October 1, 2003
Creator:
Brown, K. A. & Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
ACCELERATING CLOSURE AT DOE SITES WITH EM'S SCIENCE AND TECHNOLOGY PROGRAM
Technical support is important for all U.S. Department of Energy (DOE) facilities facing difficult technical issues, aggressive remediation schedules, and tight budgets. It is especially vital for closure sites, which typically are smaller and have fewer resources available to apply to remediation activities. In many cases, closure sites and other small sites no longer have staff with the expertise required to overcome technical barriers on their own. As closure deadlines approach, special technical expertise is needed to identify, evaluate, and implement new and innovative approaches that will result in significant cost and schedule improvement for the waste disposition pathway. Site ''problem holders'' must have access to world-class scientific and engineering expertise from DOE national laboratories and research facilities, private industry, and universities to address immediate critical problems. In order to have confidence in the feasibility and results of innovative approaches, site contractors need to have the benefit of the valuable experiences of technicians who have faced similar problems and found solutions. The DOE Environmental Management (EM) Science and Technology (S&T) program recognizes the need of the closure sites to solve problems aggressively and is highly responsive to this need. Technical support from the S&T program can take many forms, such …
Date:
February 27, 2003
Creator:
Walker, J. S.; Toussaint, Craig R., (info: Ph.D.) & Gardner, E. J.
Object Type:
Article
System:
The UNT Digital Library
Booster Fault Study No. 16: Deuteron Beam on the B6 Dump
A report on the booster fault study carried out on January 22, 2003.
Date:
October 2003
Creator:
Ahrens, L. A.; Brown, K. A. & Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
On Developing a Multifidelity Modeling Algorithm for System-Level Engineering Analysis
Multifidelity modeling, in which one component of a system is modeled at a significantly different level of fidelity than another, has several potential advantages. For example, a higher-fidelity component model can be evaluated in the context of a lower-fidelity full system model that provides more realistic boundary conditions and yet can be executed quickly enough for rapid design changes or design optimization. Developing such multifidelity models presents challenges in several areas, including coupling models with differing spatial dimensionalities. In this report we describe a multifidelity algorithm for thermal radiation problems in which a three-dimensional, finite-element model of a system component is embedded in a system of zero-dimensional (lumped-parameter) components. We tested the algorithm on a prototype system with three problems: heating to a constant temperature, cooling to a constant temperature, and a simulated fire environment. The prototype system consisted of an aeroshell enclosing three components, one of which was represented by a three-dimensional finite-element model. We tested two versions of the algorithm; one used the surface-average temperature of the three dimensional component to couple it to the system model, and the other used the volume-average temperature. Using the surface-average temperature provided somewhat better temperature predictions than using the volume-average temperature. …
Date:
February 1, 2003
Creator:
GARDNER,DAVID R. & HENNIGAN,GARY L.
Object Type:
Report
System:
The UNT Digital Library
Oligonucleotide and Long Polymeric DNA Encoding
This report summarizes the work done at Lawrence Livermore National Laboratory for the Oligonucleotide and Long Polymeric DNA Encoding project, part of the Microelectronic Bioprocesses Program at DARPA. The goal of the project was to develop a process by which long (circa 10,000 base-pair) synthetic DNA molecules could be synthesized in a timely and economic manner. During construction of the long molecule, errors in DNA sequence occur during hybridization and/or the subsequent enzymatic process. The work done on this project has resulted in a novel synthesis scheme that we call the parallel pyramid synthesis protocol, the development of a suit of computational tools to minimize and quantify errors in the synthesized DNA sequence, and experimental proof of this technique. The modeling consists of three interrelated modules: the bioinformatics code which determines the specifics of parallel pyramid synthesis for a given chain of long DNA, the thermodynamics code which tracks the products of DNA hybridization and polymerase extension during the later steps in the process, and the kinetics model which examines the temporal and spatial processes during one thermocycle. Most importantly, we conducted the first successful syntheses of a gene using small starting oligomers (tetramers). The synthesized sequence, 813 base pairs …
Date:
November 24, 2003
Creator:
Miller, E.; Mariella, R. P. Jr.; Christian, A. T.; Gardner, S. N. & Williams, J. M.
Object Type:
Report
System:
The UNT Digital Library
The RHIC Injector Accelerators Configurations, and Performance for the RHIC 2003 Au-D Physics Run.
The RHIC 2003 Physics Run [1] required collisions between gold ions and deuterons. The injector necessarily had to deliver adequate quality (transverse and longitudinal emittance) and quantity of both species. For gold this was a continuing evolution from past work [2]. For deuterons it was new territory. For the filling of the RHIC the injector not only had to deliver quality beams but also had to switch between these species quickly. This paper details the collider requirements and our success in meeting these. Some details of the configurations employed are given.
Date:
May 12, 2003
Creator:
Ahrens, L.; Benjamin, J.; Blaskiewicz, M.; Brennan, J. M.; Brown, K. A.; Carlson, K. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Black Tie Dinner - 2003 Main Event (Part 1 V2)
Video recording from the Black Tie Dinner Collection recorded during the 2003 Black Tie Dinner main event.
Date:
November 8, 2003
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
Polarized Proton Operations in the Ags and RHIC.
Polarized proton beam has been accelerated and stored at 100 GeV in Relativistic Heavy Ion Collider (RHIC) to study spin effects in the hadronic reactions. The essential equipment includes four Siberian snakes and eight spin rotators in two RHIC rings, a partial snake in the AGS, fast relative polarimeters, and ac dipoles in the AGS and RHIC. This paper summarizes the performance of RHIC as a polarized proton collider and of AGS as the injector to RHIC.
Date:
May 12, 2003
Creator:
Huang, H.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Alessi, J.; Alekseev, I. et al.
Object Type:
Article
System:
The UNT Digital Library
Commissioning Results of Slow Extraction of Heavy Ions From the AGS Booster.
Brookhaven's AGS Booster has been modified to deliver slow extracted beam to a new beam line, the NASA Space Radiation Laboratory (NSRL). This facility was constructed in collaboration with NASA for the purpose of performing radiation effect studies for the NASA space program. The design of the resonant extraction system has been described in [1]. A more detailed description, which includes predictions of the slow extracted beam time structure has been described in [2]. In this report we will present results of the system commissioning and performance.
Date:
May 12, 2003
Creator:
Brown, K. A.; Bellavia, S.; Binello, S.; Brelsford, B.; Dumont, D.; Eng, W. et al.
Object Type:
Article
System:
The UNT Digital Library
TIME-RESOLVED 1-10 keV CRYSTAL SPECTROMETER FOR THE Z MACHINE AT SANDIA NATIONAL LABORATORIES
We have designed, fabricated, calibrated, and fielded a fast, time-resolved 1-10 keV crystal spectrometer to observe the evolution of wire pinch spectra at the Z machine at Sandia National Laboratories. The instrument has two convex cylindrical crystals (PET and KAP). Both crystals Bragg reflect x-rays into an array of ten silicon diodes, providing continuous spectral coverage in twenty channels from 1.0 to 10 keV. The spectral response of the instrument has been calibrated from 1.0 to 6.3 keV at beamline X8A at the National Synchrotron Light Source. The time response of the 1-mm2 silicon detectors was measured with the Pulsed X-ray Source at Bechtel Nevada's Los Alamos Operations, where 2-nanosecond full-width half-maximum (FWHM) waveforms with 700-picosecond rise times typically were observed. The spectrometer has been fielded recently on several experimental runs at the Z Machine. In this paper, we present the time-resolved spectra resulting from the implosions of double-nested tungsten wire arrays onto 5-mm diameter foam cylinders. We also show the results obtained for a double-nested stainless steel wire array with no target cylinder. The spectrometer was located at the end of a 7.1-meter beamline on line-of sight (LOS)21/22, at an angle 12{sup o} above the equatorial plane, and was …
Date:
June 1, 2003
Creator:
Morgan, D. V.; Gardner, S.; Liljestrand, R.; Madlener, M.; Slavin, S. & Wu, M.
Object Type:
Article
System:
The UNT Digital Library
A Novel Microcombustor for Sensor and Thermal Energy Management Applications in Microsystems
The microcombustor described in this report was developed primarily for thermal management in microsystems and as a platform for micro-scale flame ionization detectors (microFID). The microcombustor consists of a thin-film heater/thermal sensor patterned on a thin insulating membrane that is suspended from its edges over a silicon frame. This micromachined design has very low heat capacity and thermal conductivity and is an ideal platform for heating catalytic materials placed on its surface. Catalysts play an important role in this design since they provide a convenient surface-based method for flame ignition and stabilization. The free-standing platform used in the microcombustor mitigates large heat losses arising from large surface-to-volume ratios typical of the microdomain, and, together with the insulating platform, permit combustion on the microscale. Surface oxidation, flame ignition and flame stabilization have been demonstrated with this design for hydrogen and hydrocarbon fuels premixed with air. Unoptimized heat densities of 38 mW/mm{sup 2} have been achieved for the purpose of heating microsystems. Importantly, the microcombustor design expands the limits of flammability (Low as compared with conventional diffusion flames); an unoptimized LoF of 1-32% for natural gas in air was demonstrated with the microcombustor, whereas conventionally 4-16% observed. The LoF for hydrogen, methane, …
Date:
January 1, 2003
Creator:
MANGINELL, RONALD P.; MOORMAN, MATTHEW; COLBURN, CHRIS; ANDERSON, LAWRENCE F.; GARDNER, TIMOTHY J.; MOWERY-EVANS, DEBORAH L. et al.
Object Type:
Report
System:
The UNT Digital Library
The budding yeast silencing protein Sir1 is a functional component of centromeric chromatin
None
Date:
August 26, 2003
Creator:
Sharp, Judith A.; Krawitz, Denise C.; Gardner, Kelly A.; Fox, Catherine A. & Kaufman, Paul D.
Object Type:
Article
System:
The UNT Digital Library
Modeling of Long-Range Atmospheric Lasercom Links Between Static and Mobile Platforms
We describe modeling and simulation of long-range terrestrial laser communications links between static and mobile platforms. Atmospheric turbulence modeling, along with pointing, tracking and acquisition models are combined to provide an overall capability to estimate communications link performance.
Date:
July 29, 2003
Creator:
Scharlemann, E T; Breitfeller, E F; Henderson, J R; Kallman, J S; Morris, J R & Ruggiero, A J
Object Type:
Article
System:
The UNT Digital Library
Robust linear coupling correction with N-turn maps
N/A
Date:
June 1, 2003
Creator:
Fischer, W.
Object Type:
Report
System:
The UNT Digital Library
Application of RAD-BCG calculator to Hanford's 300 area shoreline characterization dataset
Abstract. In 2001, a multi-agency study was conducted to characterize potential environmental effects from radiological and chemical contaminants on the near-shore environment of the Columbia River at the 300 Area of the U.S. Department of Energy’s Hanford Site. Historically, the 300 Area was the location of nuclear fuel fabrication and was the main location for research and development activities from the 1940s until the late 1980s. During past waste handling practices uranium, copper, and other heavy metals were routed to liquid waste streams and ponds near the Columbia River shoreline. The Washington State Department of Health and the Pacific Northwest National Laboratory’s Surface Environmental Surveillance Project sampled various environmental components including river water, riverbank spring water, sediment, fishes, crustaceans, bivalve mollusks, aquatic insects, riparian vegetation, small mammals, and terrestrial invertebrates for analyses of radiological and chemical constituents. The radiological analysis results for water and sediment were used as initial input into the RAD-BCG Calculator. The RAD-BCG Calculator, a computer program that uses an Excel® spreadsheet and Visual Basic® software, showed that maximum radionuclide concentrations measured in water and sediment were lower than the initial screening criteria for concentrations to produce dose rates at existing or proposed limits. Radionuclide concentrations measured …
Date:
July 1, 2003
Creator:
Antonio, Ernest J.; Poston, Ted M.; Tiller, Brett L. & Patton, Gene W.
Object Type:
Article
System:
The UNT Digital Library
Buying Time: A User’s Manual for Building Resistance and Resilience to Climate Change in Natural Systems
This publication is meant for Protected Areas Managers. It gives detailed information about assessing occurring and possible damage from climate change and fending off the damage - buying time for our protected areas while the world works out the only long-term solution - reducing CO2 emissions.
Date:
August 2003
Creator:
Hansen, L. J.; Biringer J.L. & Hoffman J.R.
Object Type:
Text
System:
The UNT Digital Library
Tank 241-AY-102 Data Report
This data report discusses the methods and philosophy used to characterize two samples of sludge and one sample of drainable liquid from tank 241-AY-102 at the Hanford Site. Archived samples of sludge and drainable liquid from tank 241-AY-102 were characterized in the laboratory in order to evaluate analytical methods for testing tank waste and determine the composition and leaching characteristics of this material. The tests included physical characterization, quantitative analysis of waste composition, and short-term water leach and acid digestion of the waste material. The water leach tests were conducted over time periods of one day, two weeks, and one month to determine if contact time had an impact on leachability. Comparisons of the results of the water leach tests with the acid digestions allow for an estimation of the water leachable percentage of an element. The average water leachability of Tc-99 was measured at 20% over the one-month time frame of the leach tests. There did not appear to be any temporal change in water leachability by comparing the results of the three sampling intervals. Approximately 24 to 48% of the total Cs-137 in the sludge is water leachable over a time period of one day to one month. …
Date:
August 5, 2003
Creator:
Lindberg, Michael J. & Deutsch, William J.
Object Type:
Report
System:
The UNT Digital Library