50 Matching Results

Search Results

Results: 1 - 24 next
open access

Annual Report of the International Nuclear Energy Research Initiative Osmose Project (FY06).

Description: The goal of the OSMOSE program is to measure the reactivity effect of minor actinides in known neutron spectra of interest to the Generation-IV reactor program and other programs and to create a database of these results for use as an international benchmark for the minor actinides. The results are then compared to calculation models to verify and validate integral absorption cross-sections for the minor actinides. The OSMOSE program includes all aspects of the experimental program--including t… more
Date: August 29, 2007
Creator: Klann, R. T.; Hudelot, J. P.; Drin, N.; Zhong, Z.; Division, Nuclear Engineering & Atomique, Commissariat a l'Energie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Highly Potent, Water Soluble Benzimidazole Antagonist for Activated (alpha)4(beta)1 Integrin

Description: The cell surface receptor {alpha}{sub 4}{beta}{sub 1} integrin, activated constitutively in lymphoma, can be targeted with the bisaryl urea peptidomimetic antagonist 1 (LLP2A). However, concerns on its preliminary pharmacokinetic (PK) profile provided an impetus to change the pharmacophore from a bisaryl urea to a 2-arylaminobenzimidazole moiety resulting in improved solubility while maintaining picomolar potency [5 (KLCA4); IC{sub 50} = 305 pM]. With exceptional solubility, this finding has po… more
Date: August 29, 2007
Creator: Carpenter, R. D.; Andrei, M.; Lau, E. Y.; Lightstone, F. C.; Liu, R.; Lam, K. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sensitivity and representativity analysis of past experiments with respect to ABTR system.

Description: A comprehensive validation analysis has been performed that incorporates representativity of multiple parameters, experiments, reference designs, and adjustment of the nuclear data. The work involves a new representativity study among selected reactor designs and several experiments. Application, using existing experiments, to reference design like the ABTR and the SFR has demonstrated that it is possible to achieve a significant reduction of uncertainty on the main integral parameters of inter… more
Date: August 29, 2007
Creator: Aliberti, G.; Palmiotti, G. & Salvatores, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of the Structure of Cation-DopedBacteriogenic Uranium Oxides using X-Ray Diffraction

Description: Remediation of uranium contamination in subsurface groundwater has become imperative as previous research and manufacturing involving radionuclides has led to contamination of groundwater sources. A possible in situ solution for sequestration of uranium is a bacterial process in which Shewanella oneidensis MR-1 reduces the soluble (and thus mobile) U(VI) oxidation state into the less mobile UO{sub 2} crystalline phase. However, the long term stability of the UO2 compound must be studied as oxid… more
Date: August 29, 2007
Creator: Stahlman, Jonathan M. & /SLAC, /Carnegie Mellon U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Color Glass Condensate and the Glasma: Two Lectures.

Description: These two lectures concern the Color Glass Condensate and the Glasma. These are forms of matter which might be studied in high energy hadronic collisions. The Color Glass Condensate is high energy density gluonic matter. It constitutes the part of a hadron wave function important for high energy processes. The Glasma is matter produced from the Color Glass Condensate in the first instants after a collision of two high energy hadrons. Both types of matter are associated with coherent fields. The… more
Date: August 29, 2007
Creator: McLerran, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High Relaxivity Gadolinium Hydroxypyridonate-Viral Capsid Conjugates: Nano-sized MRI Contrast Agents

Description: High relaxivity macromolecular contrast agents based on the conjugation of gadolinium chelates to the interior and exterior surfaces of MS2 viral capsids are assessed. The proton nuclear magnetic relaxation dispersion (NMRD) profiles of the conjugates show up to a five-fold increase in relaxivity, leading to a peak relaxivity (per Gd{sup 3+} ion) of 41.6 mM{sup -1}s{sup -1} at 30 MHz for the internally modified capsids. Modification of the exterior was achieved through conjugation to flexible l… more
Date: August 29, 2007
Creator: Meux, Susan C.; Datta, Ankona; Hooker, Jacob M.; Botta, Mauro; Francis, Matthew B.; Aime, Silvio et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Managing Electronic Waste: An Analysis of State E-Waste Legislation

Description: In 2005, two congressional hearings were held to explore issues associated with e-waste, and the Congressional E-Waste Working Group was formed. One goal common to both the hearings and the establishment of the working group was to explore potential national solutions to the e-waste management issue. With increased legislative activity in the states, it is anticipated that stakeholders will increase their call for federal legislation regarding e-waste management. To illustrate the issues associ… more
Date: August 29, 2007
Creator: Luther, Linda
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PLUTONIUM FEED IMPURITY TESTING IN A LANTHANIDE BOROSILICATE (LABS) GLASS

Description: A vitrification technology utilizing a lanthanide borosilicate (LaBS) glass is a viable option for dispositioning excess weapons-useable plutonium that is not suitable for processing into mixed oxide (MOX) fuel. A significant effort to develop a glass formulation and vitrification process to immobilize plutonium was completed in the mid-1990s. The LaBS glass formulation was found to be capable of immobilizing in excess of 10 wt % Pu and to be tolerant of a range of impurities. A more detailed s… more
Date: August 29, 2007
Creator: Marra, J; Kevin Fox, K; Elizabeth Hoffman, E; Tommy Edwards, T & Charles Crawford, C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Long-term X-ray Variability of NGC 4945

Description: Though short-term X-ray variability has been studied for the active galaxy NGC 4945, long-term studies promise to contribute to our understanding of the processes involved in accretion onto supermassive black holes. In order to understand the relationship between black hole mass and breaks in the power spectral density (PSD), the long-term X-ray variability of NGC 4945 was studied over the energy range 8-30 keV. Observations occurred over the year 2006 using the Rossi X-ray Timing Explorer. The… more
Date: August 29, 2007
Creator: Miller, Amara
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ILC Electron Source Injector Simuations

Description: As part of the global project aimed at proposing an efficient design for the ILC (International Linear Collider), we simulated possible setups for the electron source injector, which will provide insight into how the electron injector for the ILC should be designed in order to efficiently accelerate the electron beams through the bunching system. This study uses three types of software: E-Gun to simulate electron beam emission, Superfish to calculate solenoidal magnetic fields, and GPT (General… more
Date: August 29, 2007
Creator: Lakshmanan, Manu & /Cornell U., LNS /SLAC
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of 50 kW Fuel Processor for Stationary Fuel Cell Applications

Description: The objective of the project was to develop and test a fuel processor capable of producing high hydrogen concentration (>98%) with less than ppm quantities of carbon dioxide and carbon monoxide at lower capital cost and higher efficiency, compared to conventional natural gas reformers. It was intended that we achieve our objective by developing simple reactor/process design, and high durability CO2 absorbents, to replace pressure swing adsorption (PSA) or membrane separators. Cost analysis indi… more
Date: August 29, 2007
Creator: Stevens, James F.; Krishnamurthy, Balaji; Atanassova, Paolina & Spilker, Kerry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pulsed Laser-Based X-Ray Sources for Rapid-Cool DT Layer Characterization

Description: Ignition targets for the National Ignition Facility (NIF) will contain a cryogenically cooled {approx} 75 {micro}m-thick deuterium/tritium (DT) ice layer surrounded by a {approx} 150 {micro}m-thick beryllium (Be) shell [1]. Ignition target design optimization depends sensitively on the achievable inner surface quality of the ice layer and on the pressure of the DT gas inside the ice, which is determined by the temperature of the ice. The inner ice layer surface is smoothest at temperatures just… more
Date: August 29, 2007
Creator: Koch, J A; Dewald, E; Izumi, N; Kozioziemski, B; Landen, O & Siders, C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Surface Treatment to Improve Corrosion Resistance in Lead-Alloy Coolants

Description: One of the six proposed advanced reactor designs of the Generation IV Initiative, the Leadcooled Fast Reactor (LFR) possesses many characteristics that make it a desirable candidate for future nuclear energy production and responsible actinide management. These characteristics include favorable heat transfer, fluid dynamics, and neutronic performance compared to other candidate coolants. However, the use of a heavy liquid metal coolant presents a challenge for reactor designers in regards to re… more
Date: August 29, 2007
Creator: Allen, Todd R.; Sridharan, Kumar; Machut, McLean T. & Tan, Lizhen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Definition of a Twelve-Point Polygonal SAA Boundaryfor the GLAST Mission

Description: The Gamma-Ray Large Area Space Telescope (GLAST), set to launch in early 2008, detects gamma rays within a huge energy range of 100 MeV - 300 GeV. Background cosmic radiation interferes with such detection resulting in confusion over distinguishing cosmic from gamma rays encountered. This quandary is resolved by encasing GLAST's Large Area Telescope (LAT) with an Anti-Coincidence Detector (ACD), a device which identifies and vetoes charged particles. The ACD accomplishes this through plastic sc… more
Date: August 29, 2007
Creator: Djomehri, Sabra I. & /UC, Santa Cruz /SLAC
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experiments for the Validation of Debris and Shrapnel Calculations

Description: The debris and shrapnel generated by laser targets are important factors in the operation of a large laser facility such as NIF, LMJ, and Orion. Past experience has shown that it is possible for such target debris to render diagnostics inoperable and also to penetrate or damage optical protection (debris) shields. We are developing the tools to allow evaluation of target configurations in order to better mitigate the generation and impact of debris, including development of dedicated modeling c… more
Date: August 29, 2007
Creator: Koniges, A. E.; Andrew, J.; Eder, D.; Kalantar, D.; Masters, N.; Fisher, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Numerical Analysis of Nanograin Collision by Classical Molecular Dynamics

Description: Interstellar dust grains [1] comprise only 1% of the mass in the molecular clouds of galaxies and yet catalyze the formation of many gas phase molecules, in particular H2 [2], which allows for the cooling and collapse of these clouds and the formation of stars and planets. High-energy radiation and particles from hot stars, supernovae, or active black holes can alter the physical properties of dust grains and thereby affect their role in these processes. There is no experimental study on grain-… more
Date: August 29, 2007
Creator: Ohnishi, N.; Bringa, E. M.; Remington, B. A.; Gilmer, G.; Minich, R.; Yamaguchi, Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen