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Coast Guard: Strategies for Mitigating the Loss of Patrol Boats Are Achieving Results in the Near Term, but They Come at a Cost and Longer Term Sustainability Is Unknown (open access)

Coast Guard: Strategies for Mitigating the Loss of Patrol Boats Are Achieving Results in the Near Term, but They Come at a Cost and Longer Term Sustainability Is Unknown

A letter report issued by the Government Accountability Office with an abstract that begins "The Coast Guard's 110-foot patrol boats are used for a number of missions, such as enforcement of fisheries laws, and the interdiction of migrants and illicit drugs. As part of the Coast Guard's initial plans to replace many of its vessels, it intended to convert its 110-foot patrol boats into 123-foot patrol boats with increased capabilities until the replacement vessel, the Fast Response Cutter (FRC), became operational. However, structural problems on the eight converted 123-foot boats led the Coast Guard to remove these boats from service. Faced with a loss of operational hours, especially in the Coast Guard's Florida-based District 7 where these boats operated, the Coast Guard implemented mitigation strategies to recover lost operational hours. This report provides information on Coast Guard patrol boat operations and, in particular, addresses: (1) operational challenges created by the removal from service of the 123-foot patrol boats and the Coast Guard's strategies for mitigating their loss; (2) effects these mitigation strategies have had on overall Coast Guard operational hours, as well as operating and maintenance costs, patrol boat crews, and mission performance; and (3) issues that could affect the …
Date: June 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Nuclear Weapons: NNSA Needs to Establish a Cost and Schedule Baseline for Manufacturing a Critical Nuclear Weapon Component (open access)

Nuclear Weapons: NNSA Needs to Establish a Cost and Schedule Baseline for Manufacturing a Critical Nuclear Weapon Component

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Energy's National Nuclear Security Administration (NNSA) is responsible for manufacturing pits, a key component in a nuclear warhead. The department lost its ability to manufacture pits in 1989 with the closing of the Rocky Flats Plant. In 1996, the Los Alamos National Laboratory (LANL) was directed to reestablish a pit manufacturing capability, starting with a limited number of pits for the W88 warhead. In recent years, NNSA has considered ways to increase its pit manufacturing capacity, including building a new, large-scale pit manufacturing facility. It has also proposed producing pits for the Reliable Replacement Warhead (RRW). GAO was asked to determine the (1) extent to which NNSA achieved its major goals for reestablishing its pit manufacturing capability, (2) factors that currently constrain its ability to increase its pit manufacturing capacity, and (3) status of its plans for future pit manufacturing. For this review, GAO met with NNSA and LANL officials, reviewed agency documents, and visited the nuclear facility used to manufacture pits."
Date: May 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Nuclear Safety: Department of Energy Needs to Strengthen Its Independent Oversight of Nuclear Facilities and Operations (open access)

Nuclear Safety: Department of Energy Needs to Strengthen Its Independent Oversight of Nuclear Facilities and Operations

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Energy (DOE) oversees contractors that operate more than 200 "high-hazard" nuclear facilities, where an accident could have serious consequences for workers and the public. DOE is charged with regulating the safety of these facilities. A key part of DOE's self-regulation is the Office of Health, Safety and Security (HSS), which develops, oversees, and helps enforce nuclear safety policies. This is the only DOE safety office intended to be independent of the program offices, which carry out mission responsibilities. This report examines (1) the extent to which HSS meets GAO's elements of effective independent nuclear safety oversight and (2) the factors contributing to any identified shortcomings with respect to these elements. GAO reviewed relevant DOE policies, interviewed officials and outside safety experts, and surveyed DOE sites to determine the number and status of nuclear facilities. GAO also assessed oversight practices against the criteria for independent oversight GAO developed based on a series of reports on DOE nuclear safety and discussions with nuclear safety experts."
Date: October 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Equal Employment Opportunity Commission: Sharing Promising Practices and Fully Implementing Strategic Human Capital Planning Can Improve Management of Growing Workload (open access)

Equal Employment Opportunity Commission: Sharing Promising Practices and Fully Implementing Strategic Human Capital Planning Can Improve Management of Growing Workload

A letter report issued by the Government Accountability Office with an abstract that begins "The Equal Employment Opportunity Commission (EEOC), created by title VII of the Civil Rights Act of 1964, promotes equal opportunity in the workplace and enforces federal laws that prohibit employment discrimination on the basis of race, sex, color, religion, national origin, age, and disability. As the nation's primary enforcer of civil rights employment laws, EEOC investigates charges of employment discrimination from the public, litigates major cases, and reaches out to federal agencies and the public to educate and prevent discrimination. EEOC serves every industry, every segment of the population, and every part of the country. While its core mission has not changed since the agency was established more than 40 years ago, EEOC continues to face a range of new challenges in the 21st century, including long-term fiscal constraints, changing demographics, and rapid advances in technology. The federal government overall faces significant human capital challenges, including a retirement wave that will lead to the loss of leadership and institutional knowledge at all levels. EEOC is not immune from this trend. EEOC estimates that within 4 years, all of its current senior executives and senior managers will …
Date: June 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Bankruptcy and Child Support Enforcement: Improved Information Sharing Possible without Routine Data Matching (open access)

Bankruptcy and Child Support Enforcement: Improved Information Sharing Possible without Routine Data Matching

A letter report issued by the Government Accountability Office with an abstract that begins "Recognizing the importance of child support, the Bankruptcy Abuse Prevention and Consumer Protection Act of 2005 requires that if a parent with child support obligations files for bankruptcy, a bankruptcy trustee must notify the relevant custodial parent and state child support enforcement agency so that they may participate in the case. The act also required GAO to study the feasibility of matching bankruptcy records with child support records to assure that filers with child support obligations are identified. GAO therefore (1) identified the percent of bankruptcy filers with obligations nationwide, (2) examined the potential for routine data matching to facilitate the identification of filers with child support obligations, and (3) studied the feasibility and cost of doing so. GAO interviewed child support enforcement and bankruptcy officials at the federal level and in six states. GAO also conducted a nationwide test data match and reviewed national bankruptcy filings for people with support obligations in Texas for an indication of whether filers are failing to provide this information."
Date: January 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Medicaid: Extent of Dental Disease in Children Has Not Decreased, and Millions Are Estimated to Have Untreated Tooth Decay (open access)

Medicaid: Extent of Dental Disease in Children Has Not Decreased, and Millions Are Estimated to Have Untreated Tooth Decay

A letter report issued by the Government Accountability Office with an abstract that begins "In recent years, concerns have been raised about the adequacy of dental care for low-income children. Attention to this subject became more acute due to the widely publicized case of Deamonte Driver, a 12-year-old boy who died as a result of an untreated infected tooth that led to a fatal brain infection. Deamonte had health coverage through Medicaid, a joint federal and state program that provides health care coverage, including dental care, for millions of low-income children. Deamonte had extensive dental disease and his family was unable to find a dentist to treat him. GAO was asked to examine the extent to which children in Medicaid experience dental disease, the extent to which they receive dental care, and how these conditions have changed over time. To examine these indicators of oral health, GAO analyzed data for children ages 2 through 18, by insurance status, from two nationally representative surveys conducted by the Department of Health and Human Services (HHS): the National Health and Nutrition Examination Survey (NHANES) and the Medical Expenditure Panel Survey (MEPS). GAO also interviewed officials from the Centers for Disease Control and Prevention, …
Date: September 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Securing, Stabilizing, and Rebuilding Iraq: Progress Report: Some Gains Made, Updated Strategy Needed (open access)

Securing, Stabilizing, and Rebuilding Iraq: Progress Report: Some Gains Made, Updated Strategy Needed

A letter report issued by the Government Accountability Office with an abstract that begins "Since 2001, Congress has appropriated about $640 billion for the global war on terrorism, the majority of this for operations in Iraq. In January 2007, the President announced The New Way Forward to stem violence in Iraq and enable the Iraqi government to foster national reconciliation. This new strategy established goals and objectives to achieve over 12 to 18 months, or by July 2008. GAO discusses progress in meeting key goals in The New Way Forward: (1) improve security conditions; (2) develop capable Iraqi security forces; and help the Iraqi government (3) enact key legislation, (4) spend capital budgets, and (5) provide essential services. GAO also discusses U.S. strategies for Iraq. GAO reviewed documents and interviewed officials from U.S. agencies, the United Nations, and the Iraqi government. GAO also had staff stationed in Baghdad. Since May 2003, GAO has issued over 130 Iraq-related audits, which provided baseline information for this assessment. GAO prepared this report under the Comptroller General's authority."
Date: June 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Information Technology: FBI Is Implementing Key Acquisition Methods on Its New Case Management System, but Related Agencywide Guidance Needs to Be Improved (open access)

Information Technology: FBI Is Implementing Key Acquisition Methods on Its New Case Management System, but Related Agencywide Guidance Needs to Be Improved

A letter report issued by the Government Accountability Office with an abstract that begins "The Federal Bureau of Investigation (FBI) is 3 years into its 6-year, $451 million program known as Sentinel, which is to replace its antiquated, paper-based, legacy systems for supporting mission-critical intelligence analysis and investigative case management activities. Because of the importance of Sentinel to the bureau's mission operations, GAO was asked to conduct a series of reviews on the FBI's management of the program. This review focuses on whether the FBI is employing effective methods in acquiring commercial solutions for Sentinel. To do so, GAO researched relevant best practices; reviewed FBI policies and procedures, program plans, and other program documents; and interviewed appropriate program officials."
Date: September 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Young Adults With Serious Mental Illness: Some States and Federal Agencies Are Taking Steps to Address Their Transition Challenges (open access)

Young Adults With Serious Mental Illness: Some States and Federal Agencies Are Taking Steps to Address Their Transition Challenges

A letter report issued by the Government Accountability Office with an abstract that begins "The transition to adulthood can be difficult for young adults who suffer from a serious mental illness, such as schizophrenia or bipolar disorder. When these individuals are unsuccessful, the result can be economic hardship, social isolation, and in some cases suicide, all of which can pose substantial costs to society. Due to concerns about young adults with serious mental illness transitioning into adulthood, GAO was asked to provide information on (1) the number of these young adults and their demographic characteristics, (2) the challenges they face, (3) how selected states assist them, and (4) how the federal government supports states in serving these young adults and coordinates programs that can assist them. To do this work, GAO analyzed data based on national surveys, including the National Comorbidity Survey Replication (NCS-R), and administrative data from the Social Security Administration (SSA). GAO also reviewed published research; interviewed federal, state, and local officials, as well as mental health providers, experts, and advocacy groups; and conducted site visits in Connecticut, Maryland, Massachusetts, and Mississippi --four states that focus on this population. GAO did not make any recommendations. HHS made comments …
Date: June 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Medicaid Home and Community-Based Waivers: CMS Should Encourage States to Conduct Mortality Reviews for Individuals with Developmental Disabilities (open access)

Medicaid Home and Community-Based Waivers: CMS Should Encourage States to Conduct Mortality Reviews for Individuals with Developmental Disabilities

A letter report issued by the Government Accountability Office with an abstract that begins "Deaths of individuals with developmental disabilities due to poor quality of care have been highlighted in the media. Prior GAO work has raised concerns about inadequate safeguards for such individuals receiving care through state Medicaid home and community-based services (HCBS) waivers. CMS approves and oversees these waivers. Safeguards include the review of, and follow-up action to, critical incidents--events that harm or have the potential to harm waiver beneficiaries. GAO was asked to examine the extent to which states (1) include, as a critical incident, deaths among individuals with developmental disabilities in waiver programs; (2) have basic components in place to review such deaths; and (3) have adopted additional components to review deaths. GAO interviewed state developmental disabilities agency officials and external stakeholders in 14 states, e-mailed a survey to 35 states and D.C., interviewed experts, and reviewed documents."
Date: May 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Electronic Payments: Many Programs Electronically Disburse Federal Benefits, and More Outreach Could Increase Use (open access)

Electronic Payments: Many Programs Electronically Disburse Federal Benefits, and More Outreach Could Increase Use

A letter report issued by the Government Accountability Office with an abstract that begins "Traditionally, federal agencies made benefit payments by paper check, but they faced increased pressure to reduce costs and increase the convenience, security, and timeliness of payment delivery. In response to a 1996 congressional mandate, the U.S. Department of Agriculture's Food Stamp Program implemented Electronic Benefit Transfer (EBT) to distribute food stamps. According to agency evaluations, EBT has reduced program costs and fraud and offered recipients a quick, secure way to receive payment. These results spurred interest in using electronic payment methods for other benefit programs. GAO was asked to report on (1) the extent to which federal benefit programs are using electronic payments, and factors agencies consider for their use and (2) options for increasing the use of electronic payments, particularly the Department of the Treasury's (Treasury) actions to that end. GAO surveyed federal benefit programs identified from two federal databases; reviewed documents, reports, and studies on electronic payments; and interviewed federal and state agency, industry, and consumer representatives."
Date: June 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Department of Homeland Security: Improvements Could Further Enhance Ability to Acquire Innovative Technologies Using Other Transaction Authority (open access)

Department of Homeland Security: Improvements Could Further Enhance Ability to Acquire Innovative Technologies Using Other Transaction Authority

A letter report issued by the Government Accountability Office with an abstract that begins "When the Department of Homeland Security (DHS) was created in 2002, it was granted "other transaction" authority--a special authority used to meet mission needs. While the authority provides greater flexibility to attract and work with nontraditional contractors to research, develop, and test innovative technologies, other transactions carry the risk of reduced accountability and transparency--in part because they are exempt from certain federal acquisition regulations and cost accounting standards. In 2004, GAO reported on DHS's early use of this authority. This follow-up report determines the extent to which nontraditional contractors have been involved in DHS's other transactions, and assesses DHS's management of the acquisition process when using this authority to identify additional safeguards. To conduct its work, GAO reviewed relevant statutes, guidance, and prior GAO reports on other transactions, and interviewed contracting and program management officials, as well as contractors. GAO also reviewed 53 files for agreements entered into from fiscal years 2004 through 2008 and identified those involving nontraditional contractors."
Date: September 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Defense Infrastructure: Services' Use of Land Use Planning Authorities (open access)

Defense Infrastructure: Services' Use of Land Use Planning Authorities

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) is one of the largest landholding agencies in the federal government with more than 577,500 facilities at 5,300 sites on over 32 million acres. GAO has previously reported that the management of DOD-held real property is a high-risk area, in part because of deteriorating facilities and problems with excess and underutilized property. To address these problems, DOD has developed a multipart strategy involving base realignment and closure, housing privatization, and demolition of facilities that are no longer needed. DOD is also leasing out underutilized real property to gain resources to repair or construct facilities. The House Armed Services Committee Report on the National Defense Authorization Act for Fiscal Year 2008 directed the Comptroller General to provide an analysis of DOD's use of its land use planning authorities. Specifically, GAO examined (1) how DOD has used its authorities; (2) the reasons why land, buildings, and facilities on DOD installations may appear to be underutilized or not utilized; and (3) the policies and procedures used by the services to respond to requests by other federal agencies for space at a DOD installation. GAO …
Date: July 23, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Optimizing the User Experience in a Rapid Development Framework: Dallas Genealogical Society: Focus Group 1 Discussion, July 2008 (open access)

Optimizing the User Experience in a Rapid Development Framework: Dallas Genealogical Society: Focus Group 1 Discussion, July 2008

This is a report of the findings from the March 16, 2008 focus group discussion with members of the Dallas Genealogical Society. The UNT Libraries received a National Leadership Grant from the Institute of Museum and Library Services in December 2007 for a two-year project to identify the user interface requirements of genealogists interacting with the Libraries' Portal to Texas history. The IOGENE project involves genealogists in the design process beginning with the initial assessment of their requirements and continuing through usability testing of the redesigned Portal interface.
Date: July 23, 2008
Creator: Murray, Kathleen R.
System: The UNT Digital Library
Optimizing the User Experience in a Rapid Development Framework: Dallas Genealogical Society: Focus Group 2 Discussion, July 2008 (open access)

Optimizing the User Experience in a Rapid Development Framework: Dallas Genealogical Society: Focus Group 2 Discussion, July 2008

This report presents findings from the March 30, 2008 focus group discussion with members of the Dallas Genealogical Society. The UNT Libraries received a National Leadership Grant from the Institute of Museum and Library Services in December 2007 for a two-year project to identify the user interface requirements of genealogists interacting with the Libraries' Portal to Texas history. The IOGENE project involves genealogists in the design process beginning with the initial assessment of their requirements and continuing through usability testing of the redesigned Portal interface.
Date: July 23, 2008
Creator: Murray, Kathleen R.
System: The UNT Digital Library
Asian Pacific Americans in the United States Congress (open access)

Asian Pacific Americans in the United States Congress

Asian Pacific Americans have served in both houses of Congress representing California, Hawaii, Louisiana, Oregon, Virginia, American Samoa, and Guam. They have served in leadership positions, including committee and subcommittee chairmanships. This report presents information on Senators, Representatives, and Delegates, including party affiliations, length and dates of service, and committee assignments.
Date: June 23, 2008
Creator: Tong, Lorraine H.
System: The UNT Digital Library
Foreign Science and Engineering Presence in U.S. Institutions and the Labor Force (open access)

Foreign Science and Engineering Presence in U.S. Institutions and the Labor Force

The increased presence of foreign students in graduate science and engineering programs and in the scientific workforce has been and continues to be of concern to some in the scientific community. Enrollment of U.S. citizens in graduate science and engineering programs has not kept pace with that of foreign students in those programs. Many in the scientific community maintain that in order to compete with countries that are rapidly expanding their scientific and technological capabilities, the country needs to bring to the United States those whose skills will benefit society and will enable us to compete in the new-technology based global economy. This report analyzes this issue in detail and includes discussion of related legislation.
Date: July 23, 2008
Creator: Matthews, Christine M.
System: The UNT Digital Library
Social Services Block Grant: (Title XX of the Social Security Act) (open access)

Social Services Block Grant: (Title XX of the Social Security Act)

The FY2008 Consolidated Appropriations Act (P.L. 110-161) maintains SSBG funding at $1.7 billion and maintains states' authority to transfer up to 10% of their Temporary Assistance for Needy Families (TANF) block grants to the SSBG. The $1.7 billion in regular funds mirrors funding included in both the FY2007 and FY2006 laws, but exceeds the $1.2 billion that the President proposed for FY2008, and most recently, for FY2009. The FY2009 budget also includes a proposal to eliminate the SSBG in FY2010. This report provides SSBG background information and tracks relevant legislation and appropriations measures.
Date: June 23, 2008
Creator: Gish, Melinda
System: The UNT Digital Library
A Virtual Reality Framework to Optimize Design, Operation and Refueling of GEN-IV Reactors. (open access)

A Virtual Reality Framework to Optimize Design, Operation and Refueling of GEN-IV Reactors.

many GEN-IV candidate designs are currently under investigation. Technical issues related to material, safety and economics are being addressed at research laboratories, industry and in academia. After safety, economic feasibility is likely to be the most important crterion in the success of GEN-IV design(s). Lessons learned from the designers and operators of GEN-II (and GEN-III) reactors must play a vital role in achieving both safety and economic feasibility goals.
Date: April 23, 2008
Creator: Rizwan-uddin; Karancevic, Nick; Markidis, Stefano; Dixon, Joel; Luo, Cheng & Reynolds, Jared
System: The UNT Digital Library
Reactive Distillation for Esterification of Bio-based Organic Acids (open access)

Reactive Distillation for Esterification of Bio-based Organic Acids

The following is the final report of the three year research program to convert organic acids to their ethyl esters using reactive distillation. This report details the complete technical activities of research completed at Michigan State University for the period of October 1, 2003 to September 30, 2006, covering both reactive distillation research and development and the underlying thermodynamic and kinetic data required for successful and rigorous design of reactive distillation esterification processes. Specifically, this project has led to the development of economical, technically viable processes for ethyl lactate, triethyl citrate and diethyl succinate production, and on a larger scale has added to the overall body of knowledge on applying fermentation based organic acids as platform chemicals in the emerging biorefinery. Organic acid esters constitute an attractive class of biorenewable chemicals that are made from corn or other renewable biomass carbohydrate feedstocks and replace analogous petroleum-based compounds, thus lessening U.S. dependence on foreign petroleum and enhancing overall biorefinery viability through production of value-added chemicals in parallel with biofuels production. Further, many of these ester products are candidates for fuel (particularly biodiesel) components, and thus will serve dual roles as both industrial chemicals and fuel enhancers in the emerging bioeconomy. The …
Date: September 23, 2008
Creator: Fields, Nathan; Miller, Dennis J.; Asthana, Navinchandra S.; Kolah, Aspi K.; Vu, Dung & Lira, Carl T.
System: The UNT Digital Library
ENHANCED DOE HIGH LEVEL WASTE MELTER THROUGHPUT STUDIES: SRNL GLASS SELECTION STRATEGY (open access)

ENHANCED DOE HIGH LEVEL WASTE MELTER THROUGHPUT STUDIES: SRNL GLASS SELECTION STRATEGY

The Department of Energy has authorized a team of glass formulation and processing experts at the Savannah River National Laboratory (SRNL), the Pacific Northwest National Laboratory (PNNL), and the Vitreous State Laboratory (VSL) at Catholic University of America to develop a systematic approach to increase high level waste melter throughput (by increasing waste loading with minimal or positive impacts on melt rate). This task is aimed at proof-of-principle testing and the development of tools to improve waste loading and melt rate, which will lead to higher waste throughput. Four specific tasks have been proposed to meet these objectives (for details, see WSRC-STI-2007-00483): (1) Integration and Oversight, (2) Crystal Accumulation Modeling (led by PNNL)/Higher Waste Loading Glasses (led by SRNL), (3) Melt Rate Evaluation and Modeling, and (4) Melter Scale Demonstrations. Task 2, Crystal Accumulation Modeling/Higher Waste Loading Glasses is the focus of this report. The objective of this study is to provide supplemental data to support the possible use of alternative melter technologies and/or implementation of alternative process control models or strategies to target higher waste loadings (WLs) for the Defense Waste Processing Facility (DWPF)--ultimately leading to higher waste throughputs and a reduced mission life. The glass selection strategy discussed …
Date: January 23, 2008
Creator: Raszewski, F; Tommy Edwards, T & David Peeler, D
System: The UNT Digital Library
The Design of a RapidDischarge Varistor System for the MICE Magnet Circuits (open access)

The Design of a RapidDischarge Varistor System for the MICE Magnet Circuits

The need for a magnet circuit discharge system, in order to protect the magnet HTS leads during a power failure, has been discussed in recent MICE reports [1], [2]. In order to rapidly discharge a magnet, one has to put enough resistance across the lead. The resistance in this case is varistor that is put across the magnet in the event of a power outage. The resistance consists of several diodes, which act as constant voltage resistors and the resistance of the cables connecting the magnets in the circuit to each other and to the power supply. In order for the rapid discharge system to work without quenching the magnets, the voltage across the magnets must be low enough so that the diodes in the quench protection circuit don't fire and cause the magnet current to bypass the superconducting coils. It is proposed that six rapid discharge varistors be installed across the three magnet circuits the power the tracker solenoids, which are connected in series. The focusing magnets, which are also connected in series would have three varistors (one for each magnet). The coupling magnets would have a varistor for each magnet. The peak voltage that is allowed per varistor …
Date: July 23, 2008
Creator: Green, Michael A.
System: The UNT Digital Library
Direct-Cooled Power Electronics Substrate (open access)

Direct-Cooled Power Electronics Substrate

The goal of the Direct-Cooled Power Electronics Substrate project is to reduce the size and weight of the heat sink for power electronics used in hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs). The concept proposed in this project was to develop an innovative power electronics mounting structure, model it, and perform both thermal and mechanical finite-element analysis (FEA). This concept involved integrating cooling channels within the direct-bonded copper (DBC) substrate and strategically locating these channels underneath the power electronic devices. This arrangement would then be directly cooled by water-ethylene glycol (WEG), essentially eliminating the conventional heat sink and associated heat flow path. The concept was evaluated to determine its manufacturability, its compatibility with WEG, and the potential to reduce size and weight while directly cooling the DBC and associated electronics with a coolant temperature of 105 C. This concept does not provide direct cooling to the electronics, only direct cooling inside the DBC substrate itself. These designs will take into account issues such as containment of the fluid (separation from the electronics) and synergy with the whole power inverter design architecture. In FY 2008, mechanical modeling of substrate and inverter core designs as well as thermal and …
Date: December 23, 2008
Creator: Wiles, R.; Ayers, C. & Wereszczak, A.
System: The UNT Digital Library
A Les Houches Interface for BSM Generators (open access)

A Les Houches Interface for BSM Generators

We propose to combine and slightly extend two existing 'Les Houches Accords' to provide a simple generic interface between beyond-the-standard-model parton-level and event-level generators. All relevant information--particle content, quantum numbers of new states, masses, cross sections, parton-level events, etc.--is collected in one single file, which adheres to the Les Houches Event File (LHEF) standard.
Date: January 23, 2008
Creator: Alwall, J.; Boos, E.; Dudko, L.; Gigg, M.; Herquet, M.; Pukhov, A. et al.
System: The UNT Digital Library