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80 and 100 Meter Wind Energy Resource Potential for the United States (Poster)
Accurate information about the wind potential in each state is required for federal and state policy initiatives that will expand the use of wind energy in the United States. The National Renewable Energy Laboratory (NREL) and AWS Truewind have collaborated to produce the first comprehensive new state-level assessment of wind resource potential since 1993. The estimates are based on high-resolution maps of predicted mean annual wind speeds for the contiguous 48 states developed by AWS Truewind. These maps, at spatial resolution of 200 meters and heights of 60 to 100 meters, were created with a mesoscale-microscale modeling technique and adjusted to reduce errors through a bias-correction procedure involving data from more than 1,000 measurement masts. NREL used the capacity factor maps to estimate the wind energy potential capacity in megawatts for each state by capacity factor ranges. The purpose of this presentation is to (1) inform state and federal policy makers, regulators, developers, and other stakeholders on the availability of the new wind potential information that may influence development, (2) inform the audience of how the new information was derived, and (3) educate the audience on how the information should be interpreted in developing state and federal policy initiatives.
Date:
May 1, 2010
Creator:
Elliott, D.; Schwartz, M.; Haymes, S.; Heimiller, D.; Scott, G.; Flowers, L. et al.
Object Type:
Article
System:
The UNT Digital Library
120-mm superconducting quadrupole for interaction regions of hadron colliders
Magnetic and mechanical designs of a Nb{sub 3}Sn quadrupole magnet with 120-mm aperture suitable for interaction regions of hadron colliders are presented. The magnet is based on a two-layer shell-type coil and a cold iron yoke. Special spacers made of a low-Z material are implemented in the coil mid-planes to reduce the level of radiation heat deposition and radiation dose in the coil. The quadrupole mechanical structure is based on aluminum collars supported by an iron yoke and a stainless steel skin. Magnet parameters including maximum field gradient and field harmonics, Nb3Sn coil pre-stress and protection at the operating temperatures of 4.5 and 1.9 K are reported. The level and distribution of radiation heat deposition in the coil and other magnet components are discussed.
Date:
May 1, 2010
Creator:
Zlobin, A. V.; Kashikhin, V.V.; Mokhov, N. V. & Novitski, I.
Object Type:
Article
System:
The UNT Digital Library
500 MW X-BAND RF SYSTEM OF A 0.25 GEV ELECTRON LINAC FOR ADVANCED COMPTON SCATTERING SOURCE APPLICATION
A Mono-Energetic Gamma-Ray (MEGa-Ray) Compton scattering light source is being developed at LLNL in collaboration with SLAC National Accelerator Laboratory. The electron beam for the Compton scattering interaction will be generated by a X-band RF gun and a X-band LINAC at the frequency of 11.424 GHz. High power RF in excess of 500 MW is needed to accelerate the electrons to energy of 250 MeV or greater for the interaction. Two high power klystron amplifiers, each capable of generating 50 MW, 1.5 msec pulses, will be the main high power RF sources for the system. These klystrons will be powered by state of the art solid-state high voltage modulators. A RF pulse compressor, similar to the SLED II pulse compressor, will compress the klystron output pulse with a power gain factor of five. For compactness consideration, we are looking at a folded waveguide setup. This will give us 500 MW at output of the compressor. The compressed pulse will then be distributed to the RF gun and to six traveling wave accelerator sections. Phase and amplitude control are located at the RF gun input and additional control points along the LINAC to allow for parameter control during operation. This high …
Date:
May 12, 2010
Creator:
Chu, T S; Anderson, S G; Gibson, D J; Hartemann, F V; Marsh, R A; Siders, C et al.
Object Type:
Article
System:
The UNT Digital Library
The 2010 Decennial Census: Background and Issues
The U.S. Constitution--Article 1, Section 2, clause 3, as modified by Section 2 of the Fourteenth Amendment--requires a population census every 10 years, to serve as the basis for reapportioning seats in the House of Representatives. Decennial census data also are used for within-state redistricting and in certain formulas that determine the annual distribution of more than $400 billion dollars in federal and state funds. This report discusses the major innovations that were planned for the 2010 census, problems encountered with the attempt to automate certain census field operations, the persistent differential census undercount of less advantaged groups in the population, and efforts to ensure an equitable census.
Date:
May 24, 2010
Creator:
Williams, Jennifer D.
Object Type:
Report
System:
The UNT Digital Library
The 2010 Decennial Census: Background and Issues
This report summarizes the information and background of the 2010 census. The report outlines what the census is and why it is necessary. Moreover, it describes the new methods used and the issues encountered by using those methods.
Date:
May 24, 2010
Creator:
Williams, Jennifer D.
Object Type:
Report
System:
The UNT Digital Library
2010 Non-Proliferation Treaty (NPT) Review Conference: Key Issues and Implications
The report includes a short summary of the provisions and goals of the Non-Proliferation Treaty (NPT) and a brief history of past review conferences. It also discusses the key issues that the participants are likely to address during the 2010 conference.
Date:
May 3, 2010
Creator:
Kerr, Paul K.; Nikitin, Mary Beth; Woolf, Amy F. & Medalia, Jonathan
Object Type:
Report
System:
The UNT Digital Library
21st Century Locomotive Technology: Quarterly Technical Status Report 29
Hybrid trip optimizer analysis tool has been implemented, to determine the optimal driving and hybrid charge-discharge control for a train.
Date:
May 24, 2010
Creator:
Lembit Salasoo, Ramu Chandra
Object Type:
Report
System:
The UNT Digital Library
4w Thomson Scattering Probe for High-density Measurements at Titan
None
Date:
May 10, 2010
Creator:
Ross, J. S.; Kline, J. L.; Yang, S.; Henesian, M.; Weiland, T.; Price, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Accelerating the Payment of PACE Assessments By Mark Zimring and Merrian Fulle
The 'acceleration' of land-secured assessments allows municipalities to declare the entire value (not just the late payments) of a property owner's outstanding balance payable if a default occurs. State laws vary on whether acceleration is required, permitted, or prohibited. Acceleration can be attractive to bond investors because it strips out non-performing assessments, and may avoid delays in debt service payments to investors. The risk that non-acceleration will negatively impact bond investors is a particular issue in states without a process for rapidly resolving defaults. However, acceleration may also increase the risk to mortgage holders, as the full amount of the outstanding assessment becomes due and traditionally has priority over other lien holders. Acceleration also places a greater burden on the property owner.
Date:
May 4, 2010
Creator:
Zimring, Mark & Fuller, Merrian
Object Type:
Report
System:
The UNT Digital Library
Accelerator neutrino program at Fermilab
The accelerator neutrino programme in the USA consists primarily of the Fermilab neutrino programme. Currently, Fermilab operates two neutrino beamlines, the Booster neutrino beamline and the NuMI neutrino beamline and is the planning stages for a third neutrino beam to send neutrinos to DUSEL. The experiments in the Booster neutrino beamline are miniBooNE, SciBooNE and in the future microBooNE, whereas in the NuMI beamline we have MINOS, ArgoNut, MINERVA and coming soon NOvA. The major experiment in the beamline to DUSEL will be LBNE.
Date:
May 1, 2010
Creator:
Parke, Stephen J.
Object Type:
Article
System:
The UNT Digital Library
Access to Broadband Networks: The Net Neutrality Debate
This report discusses the current debate over "net neutrality." While there is no single accepted definition of "net neutrality," most agree that any such definition should include the general principles that owners of the networks that compose and provide access to the Internet should not control how consumers lawfully use that network, and they should not be able to discriminate against content provider access to that network.
Date:
May 6, 2010
Creator:
Gilroy, Angele A.
Object Type:
Report
System:
The UNT Digital Library
Accurate simulation of the electron cloud in the Fermilab Main Injector with VORPAL
Precision simulations of the electron cloud at the Fermilab Main Injector have been studied using the plasma simulation code VORPAL. Fully 3D and self consistent solutions that includes E.M. field maps generated by the cloud and the proton bunches have been obtained, as well detailed distributions of the electron's 6D phase space. We plan to include such maps in the ongoing simulation of the space charge effects in the Main Injector. Simulations of the response of beam position monitors, retarding field analyzers and microwave transmission experiments are ongoing.
Date:
May 1, 2010
Creator:
Lebrun, Paul L.G.; Spentzouris, Panagiotis; Cary, John R.; Stoltz, Peter & Veitzer, Seth A.
Object Type:
Article
System:
The UNT Digital Library
Adagio 4.16 user<U+2019>s guide.
Adagio is a three-dimensional, implicit solid mechanics code with a versatile element library, nonlinear material models, and capabilities for modeling large deformation and contact. Adagio is a parallel code, and its nonlinear solver and contact capabilities enable scalable solutions of large problems. It is built on the SIERRA Framework [1, 2]. SIERRA provides a data management framework in a parallel computing environment that allows the addition of capabilities in a modular fashion. The Adagio 4.16 User's Guide provides information about the functionality in Adagio and the command structure required to access this functionality in a user input file. This document is divided into chapters based primarily on functionality. For example, the command structure related to the use of various element types is grouped in one chapter; descriptions of material models are grouped in another chapter. The input and usage of Adagio is similar to that of the code Presto [3]. Presto, like Adagio, is a solid mechanics code built on the SIERRA Framework. The primary difference between the two codes is that Presto uses explicit time integration for transient dynamics analysis, whereas Adagio is an implicit code. Because of the similarities in input and usage between Adagio and Presto, the …
Date:
May 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Adaptation of the Biolog Phenotype MicroArrayTM Technology to Profile the Obligate Anaerobe Geobacter metallireducens
The Biolog OmniLog? Phenotype MicroArray (PM) plate technology was successfully adapted to generate a select phenotypic profile of the strict anaerobe Geobacter metallireducens (G.m.). The profile generated for G.m. provides insight into the chemical sensitivity of the organism as well as some of its metabolic capabilities when grown with a basal medium containing acetate and Fe(III). The PM technology was developed for aerobic organisms. The reduction of a tetrazolium dye by the test organism represents metabolic activity on the array which is detected and measured by the OmniLog(R) system. We have previously adapted the technology for the anaerobic sulfate reducing bacterium Desulfovibrio vulgaris. In this work, we have taken the technology a step further by adapting it for the iron reducing obligate anaerobe Geobacter metallireducens. In an osmotic stress microarray it was determined that the organism has higher sensitivity to impermeable solutes 3-6percent KCl and 2-5percent NaNO3 that result in osmotic stress by osmosis to the cell than to permeable non-ionic solutes represented by 5-20percent ethylene glycol and 2-3percent urea. The osmotic stress microarray also includes an array of osmoprotectants and precursor molecules that were screened to identify substrates that would provide osmotic protection to NaCl stress. None of the …
Date:
May 17, 2010
Creator:
Joyner, Dominique; Fortney, Julian; Chakraborty, Romy & Hazen, Terry
Object Type:
Report
System:
The UNT Digital Library
The Advanced Spectroscopic Portal Program: Background and Issues for Congress
The attacks of September 11, 2001, prompted an increased federal focus on protecting the United States against terrorist nuclear or radiological attack. Since that time, the federal government has expanded existing programs, developed new programs, and deployed new equipment at U.S. borders and elsewhere. The global nuclear detection architecture has multiple facets, including source security to make acquiring threat material more difficult, intelligence activities, law enforcement activities, and deployment of radiation detection equipment. New technologies have been proposed to replace or augment existing radiation detection equipment and enhance its effectiveness. Primary among these new systems is an improved type of radiation detection device known as the Advanced Spectroscopic Portal (ASP). This report provides an overview of the ASP program's history and outlines issues for Congress as the program moves forward.
Date:
May 21, 2010
Creator:
Shea, Dana A.; Moteff, John D. & Morgan, Daniel
Object Type:
Report
System:
The UNT Digital Library
ADVANCED X-BAND TEST ACCELERATOR FOR HIGH BRIGHTNESS ELECTRON AND GAMMA RAY BEAMS
In support of Compton scattering gamma-ray source efforts at LLNL, a multi-bunch test stand is being developed to investigate accelerator optimization for future upgrades. This test stand will enable work to explore the science and technology paths required to boost the current 10 Hz monoenergetic gamma-ray (MEGa-Ray) technology to an effective repetition rate exceeding 1 kHz, potentially increasing the average gamma-ray brightness by two orders of magnitude. Multiple bunches must be of exceedingly high quality to produce narrow-bandwidth gamma-rays. Modeling efforts will be presented, along with plans for a multi-bunch test stand at LLNL. The test stand will consist of a 5.5 cell X-band rf photoinjector, single accelerator section, and beam diagnostics. The photoinjector will be a high gradient standing wave structure, featuring a dual feed racetrack coupler. The accelerator will increase the electron energy so that the emittance can be measured using quadrupole scanning techniques. Multi-bunch diagnostics will be developed so that the beam quality can be measured and compared with theory. Design will be presented with modeling simulations, and layout plans.
Date:
May 12, 2010
Creator:
Marsh, R A; Anderson, S G; Barty, C P; Chu, T S; Ebbers, C A; Gibson, D J et al.
Object Type:
Article
System:
The UNT Digital Library
Advances in coupled safety modeling using systems analysis and high-fidelity methods.
The potential for a sodium-cooled fast reactor to survive severe accident initiators with no damage has been demonstrated through whole-plant testing in EBR-II and FFTF. Analysis of the observed natural protective mechanisms suggests that they would be characteristic of a broad range of sodium-cooled fast reactors utilizing metal fuel. However, in order to demonstrate the degree to which new, advanced sodium-cooled fast reactor designs will possess these desired safety features, accurate, high-fidelity, whole-plant dynamics safety simulations will be required. One of the objectives of the advanced safety-modeling component of the Reactor IPSC is to develop a science-based advanced safety simulation capability by utilizing existing safety simulation tools coupled with emerging high-fidelity modeling capabilities in a multi-resolution approach. As part of this integration, an existing whole-plant systems analysis code has been coupled with a high-fidelity computational fluid dynamics code to assess the impact of high-fidelity simulations on safety-related performance. With the coupled capabilities, it is possible to identify critical safety-related phenomenon in advanced reactor designs that cannot be resolved with existing tools. In this report, the impact of coupling is demonstrated by evaluating the conditions of outlet plenum thermal stratification during a protected loss of flow transient. Outlet plenum stratification was …
Date:
May 31, 2010
Creator:
Fanning, T. H.; Thomas, J. W. & Division, Nuclear Engineering
Object Type:
Report
System:
The UNT Digital Library
Aerosol-Assisted Solid Debris Collection for the National Ignition Facility
The National Ignition Facility (NIF) has been completed and has made its first shots on-target. While upcoming experiments will be focused on achieving ignition, a variety of subsequent experiments are planned for the facility, including measurement of cross sections, astrophysical measurements, and investigation of hydrodynamic instability in the target capsule. In order to successfully execute several of these planned experiments, the ability to collect solid debris following a NIF capsule shot will be required. The ability to collect and analyze solid debris generated in a shot at the National Ignition Facility (NIF) will greatly expand the number of nuclear reactions studied for diagnostic purposes. Currently, reactions are limited to only those producing noble gases for cryogenic collection and counting with the Radchem Apparatus for Gas Sampling (RAGS). The radchem solid collection diagnostic has already been identified by NIF to be valuable for the determination and understanding of mix generated in the target capsule's ablation. LLNL is currently developing this solid debris collection capability at NIF, and is in the stage of testing credible designs. Some of these designs explore the use of x-ray generated aerosols to assist in collection of solid debris. However, the variety of harsh experimental conditions this …
Date:
May 21, 2010
Creator:
Nelson, S. L.; Shaughnessy, D. A.; Moody, K. J.; Ivanov, V. V.; Astanovitskiy, A. L.; Lewis, L. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Affected Property Assessment Requirements under TRRP
This document outlines the requirements for defining the three-dimensional extent of the affected property and protective concentration level exceedance zone pursuant to the Texas Risk Reduction Plan (TRRP).
Date:
May 2010
Creator:
Texas Commission on Environmental Quality. Remediation Division.
Object Type:
Pamphlet
System:
The Portal to Texas History
Afghanistan: Politics, Elections, and Government Performance
This report discusses the current political state of Afghanistan, as well as the Afghan government. This report also discusses Afghanistan's relationship with the United States, particularly U.S. efforts to urge President Hamid Karzai to address corruption within the Afghan government.
Date:
May 6, 2010
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
Afghanistan: Post-Taliban Governance, Security, and U.S. Policy
This report discusses the current political state of Afghanistan, focusing particularly on the influence of the Taliban and other militant groups and on the leadership of Afghan President Hamid Karzai. This report also discusses the U.S.-Afghanistan relationship and U.S. efforts under the Obama Administration to provide military, reconstructive, and stabilization aid.
Date:
May 11, 2010
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
Afghanistan's Security Environment
Correspondence issued by the Government Accountability Office with an abstract that begins "In December 2009, recognizing that the situation in Afghanistan had become more grave since the March 2009 announcement of the U.S. strategy for Afghanistan and Pakistan, the administration concluded a 10-week review of the strategy's goals and the methods needed to achieve them. In announcing the results of this review, the President reaffirmed the core strategic goal of disrupting, dismantling, and eventually defeating extremists in Afghanistan and Pakistan and preventing them from threatening the United States and its allies in the future. To meet this goal, the President announced his decision to rapidly deploy an additional 30,000 U.S. troops to Afghanistan. In addition, he pledged a "surge" of civilian experts to help enhance the capacity of Afghan government institutions and assist in the rehabilitation of key economic sectors. Since the President's December 2009 announcement, about 16,000 of the additional U.S. troops have gradually deployed to Afghanistan--including about 10,000 as of March 2010 and approximately another 6,000 since that time--and the number of U.S. government civilians present in country has grown by about 200. In February 2010, in what senior Department of Defense (DOD) officials have described as the …
Date:
May 5, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Africa: U.S. Foreign Assistance Issues
The United States provides assistance to 47 African countries, and the United States Agency for International Development (USAID) has 23 missions in Africa. In recent years, U.S. assistance to Africa saw a major increase, especially in health-related programs. This report provides an overview of U.S. aid to Africa, including the strategic objectives that shape U.S. aid to Africa, information about specific aid programs and initiatives, and the Obama Administration's FY2011 foreign aid budget request.
Date:
May 19, 2010
Creator:
Dagne, Ted
Object Type:
Report
System:
The UNT Digital Library
Agency for Toxic Substances and Disease Registry: Policies and Procedures for Preparing Public Health Products Should Be Strengthened
Testimony issued by the Government Accountability Office with an abstract that begins "This testimony discusses the Agency for Toxic Substances and Disease Registry's (ATSDR) policies and procedures for product preparation. ATSDR investigates community exposures related to chemical sites and releases; works with federal, tribal, state, and local agencies to identify potential exposures; assesses associated health effects; and recommends actions to stop, prevent, or minimize these harmful effects. In conducting these activities, the agency publishes many types of public health products, including public health assessments, health consultations, health study reports, and exposure investigations. Recent reports by the Institute of Medicine and ATSDR's Board of Scientific Counselors have identified various concerns such as the appropriateness and quality of the data used in ATSDR's products, the methodology and design of the studies, and clearance policies. This committee has held two previous hearings that focused on its concern about the quality of ATSDR's products. In response, ATSDR has noted that multiple factors have posed challenges for the agency, including limitations in the ability of available science to answer community questions about the effect of chemical exposures, limitations in ATSDR's ability to collect data related to exposures, and reductions since 2004 in the number of …
Date:
May 20, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library