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3,089 Matching Results
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DIRECT PHOTON MEASUREMENT AT RHIC-PHENIX.
None
Date:
October 1, 2005
Creator:
Sakaguchi, T.; Hamagaki, H.; Isobe, T.; David, G.; Mioduszewski, S.; d'Enterria, D. et al.
Object Type:
Report
System:
The UNT Digital Library
Directional neutron detectors for use with 14 MeV neutrons :fiber scintillation methods for directional neutron detection.
Current Joint Test Assembly (JTA) neutron monitors rely on knock-on proton type detectors that are susceptible to X-rays and low energy gamma rays. We investigated two novel plastic scintillating fiber directional neutron detector prototypes. One prototype used a fiber selected such that the fiber width was less than 2.1mm which is the range of a proton in plastic. The difference in the distribution of recoil proton energy deposited in the fiber was used to determine the incident neutron direction. The second prototype measured both the recoil proton energy and direction. The neutron direction was determined from the kinematics of single neutron-proton scatters. This report describes the development and performance of these detectors.
Date:
October 1, 2005
Creator:
Sunnarborg, Duane A.; Peel, Justin D.; Mascarenhas, Nicholas & Mengesha, Wondwosen
Object Type:
Report
System:
The UNT Digital Library
DOE Solar Energy Technologies Program: FY 2004 Annual Report
The DOE Solar Energy Technologies Program FY 2004 Annual Report chronicles the R&D results of the U.S. Department of Energy Solar Energy Technologies Program for Fiscal Year 2004. In particular, the report describes R&D performed by the Program's national laboratories (National Renewable Energy Laboratory, Sandia National Laboratories, Oak Ridge National Laboratory, and Brookhaven National Laboratory) and university and industry partners.
Date:
October 1, 2005
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Drawings of Bigfoot]
Photograph of a collection of Bigfoot drawings being displayed at the Southern Crypto Conference that discussed Bigfoot sightings and the formation of the Texas Bigfoot Research Center (TBRC).
Date:
October 2005
Creator:
Mallory, Randy
Object Type:
Image
System:
The UNT Digital Library
Ecological Impacts of the Cerro Grande Fire: Predicting Elk Movement and Distribution Patterns in Response to Vegetative Recovery through Simulation Modeling October 2005
In May 2000, the Cerro Grande Fire burned approximately 17,200 ha in north-central New Mexico as the result of an escaped prescribed burn initiated by Bandelier National Monument. The interaction of large-scale fires, vegetation, and elk is an important management issue, but few studies have addressed the ecological implications of vegetative succession and landscape heterogeneity on ungulate populations following large-scale disturbance events. Primary objectives of this research were to identify elk movement pathways on local and landscape scales, to determine environmental factors that influence elk movement, and to evaluate movement and distribution patterns in relation to spatial and temporal aspects of the Cerro Grande Fire. Data collection and assimilation reflect the collaborative efforts of National Park Service, U.S. Forest Service, and Department of Energy (Los Alamos National Laboratory) personnel. Geographic positioning system (GPS) collars were used to track 54 elk over a period of 3+ years and locational data were incorporated into a multi-layered geographic information system (GIS) for analysis. Preliminary tests of GPS collar accuracy indicated a strong effect of 2D fixes on position acquisition rates (PARs) depending on time of day and season of year. Slope, aspect, elevation, and land cover type affected dilution of precision (DOP) values …
Date:
October 1, 2005
Creator:
Rupp, S.P.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Economic development sales tax
This document provides information about using Texas sales taxes for city economic development.
Date:
October 2005
Creator:
Texas. Comptroller's Office.
Object Type:
Book
System:
The Portal to Texas History
Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities
There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon beam alternately through regions of low Z material, such as liquid hydrogen, and very high accelerating RF Cavities within a multi-Tesla solenoidal field. To determine the effect of very large solenoidal magnetic fields on the generation of dark current, x-rays and on the breakdown voltage gradients of vacuum RF cavities, a test facility has been established at Fermilab in Lab G. This facility consists of a 12 MW 805 MHz RF station and a large warm bore 5 T solenoidal superconducting magnet containing a pill box type cavity with thin removable window apertures. This system allows dark current and breakdown studies of different window configurations and materials. The results of this study will be presented. The study has shown that the peak achievable …
Date:
October 1, 2005
Creator:
Moretti, A.; Bross, A.; Geer, S.; Qian, Z.; Norem, J.; Li, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Effects of the 9-T magnetic field on MRS photodiode
The experimental results on the performance of the MRS (Metal/Resistor/Semiconductor) photodiode in the strong magnetic field of 9T, and the possible impact of the quench of the magnet at 9.5T on sensor's operation are reported. The measurement method used is being described. The results of the work agree with the expectations that the MRS photodiode is not exhibiting sensitivity to the magnetic field presence. This result is essential for the design of the future electron-positron linear collider detector.
Date:
October 1, 2005
Creator:
Beznosko, D.; Blazey, G.; Dyshkant, A.; Rykalin, V. & U., /Northern Illinois
Object Type:
Article
System:
The UNT Digital Library
EFG Technology and Diagnostic R&D for Large-Scale PV Manufacturing; Final Subcontract Report, 1 March 2002 - 31 March 2005
The objective of this subcontract was to carry out R&D to advance the technology, processes, and performance of RWE Schott-Solar's wafer, cell, and module manufacturing lines, and help configure these lines for scaling up of edge-defined, film-fed growth (EFG) ribbon technology to the 50-100 MW PV factory level. EFG ribbon manufacturing continued to expand during this subcontract period and now has reached a capacity of 40 MW. EFG wafer products were diversified over this time period. In addition to 10 cm x 10 cm and 10 cm x 15 cm wafer areas, which were the standard products at the beginning of this program, R&D has focused on new EFG technology to extend production to 12.5 cm x 12.5 cm EFG wafers. Cell and module production also has continued to expand in Billerica. A new 12-MW cell line was installed and brought on line in 2003. R&D on this subcontract improved cell yield and throughput, and optimized the cell performance, with special emphasis on work to speed up wafer transfer, hence enhancing throughput. Improvements of wafer transfer processes during this program have raised cell line capacity from 12 MW to over 18 MW. Optimization of module manufacturing processes was carried out …
Date:
October 1, 2005
Creator:
Kalejs, J.; Aurora, P.; Bathey, B.; Cao, J.; Doedderlein, J.; Gonsiorawski, R. et al.
Object Type:
Report
System:
The UNT Digital Library
Electrochemical Testing of Ni-Cr-Mo-Gd Alloys
The waste package site recommendation design specified a boron-containing stainless steel, Neutronit 976/978, for fabrication of the internal baskets that will be used as a corrosion-resistant neutron-absorbing material. Recent corrosion test results gave higher-than-expected corrosion rates for this material. The material callout for these components has been changed to a Ni-Cr-Mo-Gd alloy (ASTM-B 932-04, UNS N06464) that is being developed at the Idaho National Laboratory. This report discusses the results of initial corrosion testing of this material in simulated in-package environments that could contact the fuel baskets after breach of the waste package outer barrier. The corrosion test matrix was executed using the potentiodynamic and potentiostatic electrochemical test techniques. The alloy performance shows low rates of general corrosion after initial removal of a gadolinium-rich second phase that intersects the surface. The high halide-containing test solutions exhibited greater tendencies toward initiation of crevice corrosion.
Date:
October 1, 2005
Creator:
Lister, T. E.; Mizia, R. E. & Tian, H.
Object Type:
Report
System:
The UNT Digital Library
Electrolytic Reduction of Spent Oxide Fuel – Bench-Scale Test Results
A series of tests were performed to demonstrate the electrolytic reduction of spent light water reactor fuel at bench-scale in a hot cell at the Idaho National Laboratory Materials and Fuels Complex (formerly Argonne National Laboratory - West). The process involves the conversion of oxide fuel to metal by electrolytic means, which would then enable subsequent separation and recovery of actinides via existing electrometallurgical technologies, i.e., electrorefining. Four electrolytic reduction runs were performed at bench scale using ~500 ml of molten LiCl -- 1 wt% Li2O electrolyte at 650 ºC. In each run, ~50 g of crushed spent oxide fuel was loaded into a permeable stainless steel basket and immersed into the electrolyte as the cathode. A spiral wound platinum wire was immersed into the electrolyte as the anode. When a controlled electric current was conducted through the anode and cathode, the oxide fuel was reduced to metal in the basket and oxygen gas was evolved at the anode. Salt samples were extracted before and after each electrolytic reduction run and analyzed for fuel and fission product constituents. The fuel baskets following each run were sectioned and sampled, revealing an extent of uranium oxide reduction in excess of 98%.
Date:
October 1, 2005
Creator:
Herrmann, S. D.; Li, S. X. & Simpson, M. F.
Object Type:
Article
System:
The UNT Digital Library
Electrorefining Experience For Pyrochemical Reprocessing of Spent EBR-II Driver Fuel
Pyrochemical processing has been implemented for the treatment of spent fuel from the Experimental Breeder Reactor-II (EBR-II) at Idaho National Laboratory since 1996. This report summarizes technical advancements made in electrorefining of spent EBR-II driver fuel in the Mk-IV electrorefiner since the pyrochemical processing was integrated into the AFCI program in 2002. The significant advancements include improving uranium dissolution and noble metal retention from chopped fuel segments, increasing cathode current efficiency, and achieving co-collection of zirconium along with uranium from the cadmium pool.
Date:
October 1, 2005
Creator:
Li, S. X.; Johnson, T. A.; Westphal, B. R.; Goff, K. M. & Benedict, R. W.
Object Type:
Article
System:
The UNT Digital Library
Emissions Inventory Report Summary for Los Alamos National Laboratory for Calendar Year 2004
Los Alamos National Laboratory (LANL) is subject to annual emissions reporting requirements for regulated air pollutants under Title 20 of the New Mexico Administrative Code, Chapter 2, Part 73 (20.2.73 NMAC), ''Notice of Intent and Emissions Inventory Requirements''. The applicability of the requirements is based on the Laboratory's potential to emit 100 tons per year of suspended particulate matter, nitrogen oxides, carbon monoxide, sulfur oxides, or volatile organic compounds. Additionally, on April 30, 2004, LANL was issued a Title V Operating Permit from the New Mexico Environment Department, Air Quality Bureau, under 20.2.70 NMAC. This Title V Operating Permit (Permit No. P-100) includes emission limits and operating limits for all regulated sources of air pollution at LANL. The Title V Operating Permit also requires semi-annual emissions reporting for all sources included in the permit. This report summarizes both the annual emissions inventory reporting and the semi-annual emissions reporting for LANL for calendar year 2004. LANL's 2004 emissions are well below the emission limits in the Title V Operating Permit.
Date:
October 1, 2005
Creator:
Stockton, M.
Object Type:
Report
System:
The UNT Digital Library
Emittance measurements and modeling of the Fermilab booster
None
Date:
October 1, 2005
Creator:
Huang, Xiaobiao & Lee, S. Y.
Object Type:
Report
System:
The UNT Digital Library
An Empirical Model for the Response of BtA Multiwires to Different Ions
N/A
Date:
October 1, 2005
Creator:
K., Zeno
Object Type:
Report
System:
The UNT Digital Library
Energy Performance Evaluation of a Low-Energy Academic Building: Preprint
This paper considers the energy performance analyses conducted to document and verify progress toward the building's design objectives. The authors present and discuss energy performance data and draw lessons that can be applied to improve the design of this and future low-energy buildings.
Date:
October 1, 2005
Creator:
Pless, S. & Torcellini, P.
Object Type:
Report
System:
The UNT Digital Library
Engineering and Physics Optimization of Breed and Burn Fast Reactor Systems: Annual and Final Report
The Idaho National Laboratory (INL) contribution to the Nuclear Energy Research Initiative (NERI) project number 2002-005 was divided into reactor physics, and thermal-hydraulics and plant design. The research targeted credible physics and thermal-hydraulics models for a gas-cooled fast reactor, analyzing various fuel and in-core fuel cycle options to achieve a true breed and burn core, and performing a design basis Loss of Coolant Accident (LOCA) analysis on that design. For the physics analysis, a 1/8 core model was created using different enrichments and simulated equilibrium fuel loadings. The model was used to locate the hot spot of the reactor, and the peak to average energy deposition at that location. The model was also used to create contour plots of the flux and energy deposition over the volume of the reactor. The eigenvalue over time was evaluated using three different fuel configurations with the same core geometry. The breeding capabilities of this configuration were excellent for a 7% U-235 model and good in both a plutonium model and a 14% U-235 model. Changing the fuel composition from the Pu fuel which provided about 78% U-238 for breeding to the 14% U-235 fuel with about 86% U-238 slowed the rate of decrease …
Date:
October 1, 2005
Creator:
Weaver, Kevan D.; Marshall, Theron & Parry, James
Object Type:
Report
System:
The UNT Digital Library
Enhanced Wellbore Stabilization and Reservoir Productivity with Aphron Drilling Fluid Technology
None
Date:
October 1, 2005
Creator:
Growcock, Fred
Object Type:
Report
System:
The UNT Digital Library
[Entrance to scenic drive]
Photograph of a sign posted at the entrance to the Ghost Road Scenic Drive in Hardin County Park. The drive is eight miles and winds through Big Thicket National Park.
Date:
October 2005
Creator:
Mallory, Randy
Object Type:
Image
System:
The UNT Digital Library
Environmental News You Can Use, October 2005
Monthly newsletter of the Texas Commission on Environmental Quality containing information on environmental topics of interest to the general public and other groups including municipalities, businesses, corporate environmental managers, school teachers, and nonprofit organizations.
Date:
October 2005
Creator:
Texas Commission on Environmental Quality. Small Business and Environmental Assistance Division.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Equilibrium Model for Ion Exchange Between Multivalent Cations and Zeolite-A in a Molten Salt
A two-site equilibrium model that previously only accommodated monovalent cations has been extended to include divalent and trivalent cations for ion exchange between zeolite-A and molten chloride salts, a process being considered for concentrating nuclear fission products into high level waste forms. Equilibrium constants were determined by fitting the model to equilibrium data sets for ion exchange between zeolite-A and Cs ternary salt (CsCl-LiCl-KCl), Rb ternary salt (RbCl-LiCl-KCl), Na ternary salt (NaCl-LiCl-KCl), Sr ternary salt (SrCl2-LiCl-KCl), and U ternary salt (UCl3-LiCl-KCl). The results reveal a good fit between the experimental data sets and the model. The two ion exchange sites, framework sites and occluded sites, demonstrate different relative selectivities for the cations. It was found that Sr2_ is the preferred cation in the ion exchange site, and Cs_ is the preferred cation in the occlusion site. Meanwhile, Li_ has the highest combined selectivity when both ion exchange and occlusion sites are considered. Interestingly, divalent and trivalent species are more preferred in the ion exchange site than the monovalent species with the exception of Li_.
Date:
October 1, 2005
Creator:
Phongikaroon, Supathorn & Simpson, Michael
Object Type:
Article
System:
The UNT Digital Library
Establishment of an Environmental Control Technology Laboratory with a Circulating Fluidized-Bed Combustion System
This report is to present the progress made on the project ''Establishment of an Environmental Control Technology Laboratory (ECTL) with a Circulating Fluidized-Bed Combustion (CFBC) System'' during the period July 1, 2005 through September 30, 2005. The following tasks have been completed. First, the construction of the Circulating Fluidized-Bed (CFB) Combustor Building was completed. The experimental facilities have been moved into the CFB Combustor Building. Second, the fabrication and manufacture of the CFBC Facility is in the final stage and is expected to be completed before November 30, 2005. Third, the drop tube reactor has been remodeled and installed to meet the specific requirements for the investigation of the effects of flue gas composition on mercury oxidation. This study will start in the next quarter. Fourth, the effect of sulfur dioxide on molecular chlorine via the Deacon reaction was investigated. The experimental results from this study are presented in this report. Finally, the proposed work for the next quarter is described in this report.
Date:
October 1, 2005
Creator:
Pan, Wei-Ping; Li, Songgeng & Riley, John T.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Hybrid Air-Cooled Flash/Binary Power Cycle
Geothermal binary power plants reject a significant portion of the heat removed from the geothermal fluid. Because of the relatively low temperature of the heat source (geothermal fluid), the performance of these plants is quite sensitive to the sink temperature to which heat is rejected. This is particularly true of air-cooled binary plants. Recent efforts by the geothermal industry have examined the potential to evaporatively cool the air entering the air-cooled condensers during the hotter portions of a summer day. While the work has shown the benefit of this concept, air-cooled binary plants are typically located in regions that lack an adequate supply of clean water for use in this evaporative cooling. In the work presented, this water issue is addressed by pre-flashing the geothermal fluid to produce a clean condensate that can be utilized during the hotter portions of the year to evaporatively cool the air. This study examines both the impact of this pre-flash on the performance of the binary plant, and the increase in power output due to the ability to incorporate an evaporative component to the heat rejection process.
Date:
October 1, 2005
Creator:
Mines, Greg
Object Type:
Article
System:
The UNT Digital Library
Evaluation of Roof Bolting Requirements Based on In-Mine Roof Bolter Drilling
Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof bolting systems. This research is to develop a method for predicting the roof geology and stability condition in real time during roof bolting operation. Based on this information, roof bolting design criteria for modern roof bolting systems will be developed for implementation in real time. For the prediction of roof geology and stability condition in real time, a micro processor was used and a program developed to monitor and record the drilling parameters of roof bolter. These parameters include feed pressure, feed flow (penetration rate), rotation pressure, rotation rate, vacuum pressure, oil temperature of hydraulic circuit, and signals for controlling machine. From the results of a series of laboratory and underground tests so far, feed pressure is found to be a …
Date:
October 1, 2005
Creator:
Peng, Syd S.
Object Type:
Report
System:
The UNT Digital Library