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U.S. International Food Assistance Report
This report summarizes USAID's programs and financial information during the 2014 fiscal year.
Date:
May 2010
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
U.S. Strategic Petroleum Reserve Vapor Pressure Committee 2009 annual report.
This report comprises an annual summary of activities under the U.S. Strategic Petroleum Reserve (SPR) Vapor Pressure Committee in FY2009. The committee provides guidance to senior project management on the issues of crude oil vapor pressure monitoring nd mitigation. The principal objectives of the vapor pressure program are, in the event of an SPR drawdown, to minimize the impact on the environment and assure worker safety and public health from crude oil vapor emissions. The annual report reviews key program areas ncluding monitoring program status, mitigation program status, new developments in measurements and modeling, and path forward including specific recommendations on cavern sampling for the next year. The contents of this report were first presented to SPR senior anagement in December 2009, in a deliverable from the vapor pressure committee. The current SAND report is an adaptation for the Sandia technical audience.
Date:
May 1, 2010
Creator:
Allen, Ray (Allen Energy Services, Inc., Longview, TX); Eldredge, Lisa (DynMcDermott Petroleum Operations, Harahan, LA); DeLuca, Charles (DynMcDermott Petroleum Operations, Harahan, LA); Mihalik, Patrick (DynMcDermott Petroleum Operations, Harahan, LA); Maldonado, Julio (U.S. Department of Energy, Harahan, LA); Lord, David L. et al.
Object Type:
Report
System:
The UNT Digital Library
Ultrafast conversions between hydrogen bonded structures in liquid water observed by femtosecond x-ray spectroscopy
We present the first femtosecond soft x-ray spectroscopy in liquids, enabling the observation of changes in hydrogen bond structures in water via core-hole excitation. The oxygen K-edge of vibrationally excited water is probed with femtosecond soft x-ray pulses, exploiting the relation between different water structures and distinct x-ray spectral features. After excitation of the intramolecular OH stretching vibration, characteristic x-ray absorption changes monitor the conversion of strongly hydrogen-bonded water structures to more disordered structures with weaker hydrogen-bonding described by a single subpicosecond time constant. The latter describes the thermalization time of vibrational excitations and defines the characteristic maximum rate with which nonequilibrium populations of more strongly hydrogen-bonded water structures convert to less-bonded ones. On short time scales, the relaxation of vibrational excitations leads to a transient high-pressure state and a transient absorption spectrum different from that of statically heated water.
Date:
May 1, 2010
Creator:
Wen, Haidan; Huse, Nils; Schoenlein, Robert W. & Lindenberg, Aaron M.
Object Type:
Article
System:
The UNT Digital Library
UNDESIRABLE FLOW BEHAVIOR IN A PROPOSED VALIDATION DATA SET
The next generation nuclear plant (NGNP), whose development is supported by the U. S. Department of Energy, will be a very high temperature reactor (VHTR). The VHTR is a single-phase helium-cooled reactor that will provide helium at up to 1000 °C. The prospect of a coolant at these temperatures circulating in the reactor vessel demands that careful analysis be performed to ensure that excessively hot spots are not created and that sufficient mixing of the coolant is obtained. Computational fluid dynamics (CFD) coupled with heat transfer will be used to perform the desired analyses. However, primarily because of the imperfect nature of modeling turbulent flow, any CFD calculations used to perform nuclear reactor safety analysis must be validated against experimental data. Experimental data have been taken in a scaled section of the lower plenum of a prismatic VHTR at the matched index of refraction (MIR) facility at the Idaho National Laboratory. These data were taken with the intent that they be examined for use as validation data. A series of investigations have been conducted to assess the MIR data. Issues that have already been examined include the extent of the required computational domain, the outlet boundary condition, the inlet data …
Date:
May 1, 2010
Creator:
Johnson, Richard W.; McIlroy, Hugh M.; Johnson, Ryan C. & Christensen, Daniel P.
Object Type:
Article
System:
The UNT Digital Library
The US Muon Accelerator Program
An accelerator complex that can produce ultra-intense beams of muons presents many opportunities to explore new physics. A facility of this type is unique in that, in a relatively straightforward way, it can present a physics program that can be staged and thus move forward incrementally, addressing exciting new physics at each step. At the request of the US Department of Energy's Office of High Energy Physics, the Neutrino Factory and Muon Collider Collaboration (NFMCC) and the Fermilab Muon Collider Task Force (MCTF) have recently submitted a proposal to create a Muon Accelerator Program that will have, as a primary goal, to deliver a Design Feasibility Study for an energy-frontier Muon Collider by the end of a 7 year R&D program. This paper presents a description of a Muon Collider facility and gives an overview of the proposal.
Date:
May 1, 2010
Creator:
Torun, Y.; Kirk, H.; Bross, A.; Geer, Steve; Shiltsev, Vladimir & Zisman, M.
Object Type:
Article
System:
The UNT Digital Library
Use of an Injection Locked Magnetron to Drive a Superconducting RF Cavity
The use of an injection locked CW magnetron to drive a 2.45 GHz superconducting RF cavity has been successfully demonstrated. With a locking power less than -27 dB with respect to the output and with a phase control system acting on the locking signal, cavity phase was accurately controlled for hours at a time without loss of lock whilst suppressing microphonics. The phase control accuracy achieved was 0.8 deg. r.m.s. The main contributing disturbance limiting ultimate phase control was power supply ripple from the low specification switch mode power supply used for the experiment.
Date:
May 1, 2010
Creator:
Haipeng Wang, Robert Rimmer, G. Davis, Imran Tahir, Amos Dexter, Greame Burt, Richard Carter
Object Type:
Article
System:
The UNT Digital Library
Using Quasi-Elastic Events to Measure Neutrino Oscillations with MINOS Detectors in the NuMI Neutrino Beam
MINOS (Main Injector Neutrino Oscillation Search) experiment has been designed to search for a change in the flavor composition of a beam of muon neutrinos as they travel between the Near Detector at Fermi National Accelerator Laboratory and the Far Detector in the Soudan mine in Minnesota, 735 km from the target. The MINOS oscillation analysis is mainly performed with the charged current (CC) events and sensitive to constrain high-{Delta}m{sup 2} values. However, the quasi-elastic (QEL) charged current interaction is dominant in the energy region important to access low-{Delta}m{sup 2} values. For further improvement, the QEL oscillation analysis is performed in this dissertation. A data sample based on a total of 2.50 x 10{sup 20} POT is used for this analysis. In summary, 55 QEL-like events are observed at the Far detector while 87.06 {+-} 13.17 (syst.) events are expected with null oscillation hypothesis. These data are consistent with {nu}{sub {mu}} disappearance via oscillation with {Delta}m{sup 2} = 2.10 {+-} 0.37 (stat.) {+-} 0.24 (syst.) eV{sup 2} and the maximal mixing angle.
Date:
May 1, 2010
Creator:
Watabe, Masaki & University, /Texas A&M
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Validation of Hawaii Wind Integration Data Set, NREL (National Renewable Energy Laboratory) (Poster)
Poster depicts validation of Hawaii Wind Integration Data Set.
Date:
May 1, 2010
Creator:
Schwartz, M.; Elliott, D.; Lew, D.; Scott, G.; Wan, Y. H.; Orwig, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Validations of CFD Code for Density-Gradient Driven Air Ingress Stratified Flow
Air ingress into a very high temperature gas-cooled reactor (VHTR) is an important phenomena to consider because the air oxidizes the reactor core and lower plenum where the graphite structure supports the core region in the gas turbine modular helium reactor (GTMHR) design, thus jeopardizing the reactor’s safety. Validating the computational fluid dynamics (CFD) code used to analyze the air ingress phenomena is therefore an essential part of the safety analysis and the ultimate computation required for licensing
Date:
May 1, 2010
Creator:
Oh, Chang H.; Kim, Eung S.; Schultz, Richard & Petti, David
Object Type:
Article
System:
The UNT Digital Library
Viability of Small Wind Distributed Generation for Farmers Who Irrigate (Poster)
About 14% of U.S. farms are irrigated, representing 55 million acres of irrigated land. Irrigation on these farms is a major energy user in the United States, accounting for one-third of water withdrawals and 137 billion gallons per day. More than half of the Irrigation systems use electric energy. Wind energy can be a good choice for meeting irrigation energy needs. Nine of the top 10 irrigation states (California, Texas, Idaho, Arkansas, Colorado, Nebraska, Arizona, Kansas, Washington, and Oregon) have good to excellent wind resources. Many rural areas have sufficient wind speeds to make wind an attractive alternative, and farms and ranches can often install a wind energy system without impacting their ability to plant crops and graze livestock. Additionally, the rising and uncertain future costs of diesel, natural gas, and even electricity increase the potential effectiveness for wind energy and its predictable and competitive cost. In general, wind-powered electric generation systems generate more energy in the winter months than in the summer months when most crops need the water. Therefore, those states that have a supportive net metering policy can dramatically impact the viability of an onsite wind turbine. This poster presentation highlights case studies that show favorable and …
Date:
May 1, 2010
Creator:
Meadows, B.; Forsyth, T.; Johnson, S. & Healow, D.
Object Type:
Article
System:
The UNT Digital Library
Watching Electrons Transfer from Metals to Insulators using Two Photon Photoemission
Ultrafast angle-resolved two photon photoemission was used to study the dynamics and interfacial band structure of ultrathin films adsorbed onto Ag(111). Studies focused on the image potential state (IPS) in each system as a probe for measuring changes in electronic behavior in differing environments. The energetics and dynamics of the IPS at the toluene/Ag(111) interface are strongly dependent upon coverage. For a single monolayer, the first IPS is bound by 0.81 eV below the vacuum level and has a lifetime of 50 femtoseconds (fs). Further adsorption of toluene creates islands of toluene with an exposed wetting layer underneath. The IPS is then split into two peaks, one corresponding to the islands and one corresponding to the monolayer. The wetting layer IPS shows the same dynamics as the monolayer, while the lifetime of the islands increases exponentially with increasing thickness. Furthermore, the island IPS transitions from delocalized to localized within 500 fs, and electrons with larger parallel momenta decay much faster. Attempts were made using a stochastic model to extract the rates of localization and intraband cooling at differing momenta. In sexithiophene (6T) and dihexyl-sexithiophene (DH6T), the IPS was used as a probe to see if the nuclear motion of spectating …
Date:
May 1, 2010
Creator:
Johns, James E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Wedge Absorber Design for the Muon Ionisation Cooling Experiment
In the Muon Ionisation Cooling Experiment (MICE), muons are cooled by ionisation cooling. Muons are passed through material, reducing the total momentum of the beam. This results in a decrease in transverse emittance and a slight increase in longitudinal emittance, but overall reduction of 6d beam emittance. In emittance exchange, a dispersive beam is passed through wedge-shaped absorbers. Muons with higher energy pass through more material, resulting in a reduction in longitudinal emittance as well as transverse emittance. We consider the cooling performance of different wedge materials and geometries and propose a set of measurements that would be made in MICE.We outline the resources these measurements would require and detail some constraints that guide the choice of wedge parameters.
Date:
May 1, 2010
Creator:
Rogers, C.; Snopok, P.; Coney, L. & Jansson, A.
Object Type:
Article
System:
The UNT Digital Library
Western Wind and Solar Integration Study
This report provides a full description of the Western Wind and Solar Integration Study (WWSIS) and its findings.
Date:
May 1, 2010
Creator:
Energy, GE
Object Type:
Report
System:
The UNT Digital Library
Who Regulates Petroleum Storage Tanks?
This document was developed to be used as a general guide to the agencies involved with regulating storage-tank systems, whether underground or aboveground.
Date:
May 2010
Creator:
Texas Commission on Environmental Quality
Object Type:
Text
System:
The Portal to Texas History
Wind Energy Technology Trends: Comparing and Contrasting Recent Cost and Performance Forecasts (Poster)
Poster depicts wind energy technology trends, comparing and contrasting recent cost and performance forecasts.
Date:
May 1, 2010
Creator:
Lantz, E. & Hand, M.
Object Type:
Article
System:
The UNT Digital Library
Wind Energy Workforce Development: A Roadmap to a Sustainable Wind Industry (Poster)
As the United States moves toward a vision of greatly expanded wind energy use as outlined in the U.S. Department of Energy's 20% Wind Energy by 2030 report, the need for skilled workers at all levels in the industry is repeatedly identified as a critical issue. This presentation is an overview of the educational infrastructure and expected industry needs to support the continued development of a vibrant U.S. wind industry through a discussion of the activities identified that must be put in place to train workers. The paper will also provide a framework to address issues raised from each of the education and industry sectors, identifying a roadmap for developing an educational infrastructure to support wind technology. The presentation will also provide an understanding of the available resources, materials, and programs available across the industry. This presentation provides an overview of the educational infrastructure and expected industry needs to support the continued development of a vibrant U.S. wind industry as part of a collaborative effort to develop a wind workforce roadmap. This presentation will provide 1) A review of needed programs to train workers for the wind industry; 2) An overview of the importance education will play if the nation …
Date:
May 1, 2010
Creator:
Baring-Gould, I. & Kelly, M.
Object Type:
Article
System:
The UNT Digital Library
Wind for Schools (Poster)
As the United States dramatically expands wind energy deployment, the industry is challenged with developing a skilled workforce and addressing public resistance. Wind Powering America's Wind for Schools project addresses these issues by developing Wind Application Centers (WACs) at universities; WAC students assist in implementing school wind turbines and participate in wind courses, by installing small wind turbines at community "host" schools, by implementing teacher training with interactive curricula at each host school. This poster provides an overview of the first two years of the Wind for Schools project, primarily supporting activities in Colorado, Kansas, Nebraska, South Dakota, Montana, and Idaho.
Date:
May 1, 2010
Creator:
Baring-Gould, I.
Object Type:
Article
System:
The UNT Digital Library
Wind Turbine Generator System Duration Test Report for the ARE 442 Wind Turbine
This test is being conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, four turbines are being tested at the NWTC as a part of this project. Duration testing is one of up to 5 tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing provide manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a grid connected ARE 442 wind turbine mounted on a 30.5 meter (100 ft) lattice tower manufactured by Abundant Renewable Energy. The system was installed by the NWTC Site Operations group with guidance and assistance from Abundant Renewable Energy.
Date:
May 1, 2010
Creator:
van Dam, J.; Baker, D. & Jager, D.
Object Type:
Report
System:
The UNT Digital Library
Wind Turbine Generator System Duration Test Report for the Mariah Power Windspire Wind Turbine
This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of the first round of this project. Duration testing is one of up to five tests that may be performed on the turbines. Other tests include power performance, safety and function, noise, and power quality tests. NWTC testing results provide manufacturers with reports that may be used to meet part of small wind turbine certification requirements. This duration test report focuses on the Mariah Power Windspire wind turbine.
Date:
May 1, 2010
Creator:
Huskey, A.; Bowen, A. & Jager, D.
Object Type:
Report
System:
The UNT Digital Library
Xyce parallel electronic simulator.
This document is a reference guide to the Xyce Parallel Electronic Simulator, and is a companion document to the Xyce Users' Guide. The focus of this document is (to the extent possible) exhaustively list device parameters, solver options, parser options, and other usage details of Xyce. This document is not intended to be a tutorial. Users who are new to circuit simulation are better served by the Xyce Users' Guide.
Date:
May 1, 2010
Creator:
Keiter, E. R.; Mei, Ting; Russo, T. V.; Rankin, E. L.; Schiek, R. L.; Thornquist, H. K. et al.
Object Type:
Report
System:
The UNT Digital Library
Xyce parallel electronic simulator release notes.
The Xyce Parallel Electronic Simulator has been written to support, in a rigorous manner, the simulation needs of the Sandia National Laboratories electrical designers. Specific requirements include, among others, the ability to solve extremely large circuit problems by supporting large-scale parallel computing platforms, improved numerical performance and object-oriented code design and implementation. The Xyce release notes describe: Hardware and software requirements New features and enhancements Any defects fixed since the last release Current known defects and defect workarounds For up-to-date information not available at the time these notes were produced, please visit the Xyce web page at http://www.cs.sandia.gov/xyce.
Date:
May 1, 2010
Creator:
Keiter, Eric R.; Hoekstra, Robert J.; Mei, Ting; Russo, Thomas V.; Schiek, Richard L.; Thornquist, Heidi K. et al.
Object Type:
Report
System:
The UNT Digital Library