Advances in the theory of box integrals (open access)

Advances in the theory of box integrals

Box integrals - expectations <|{rvec r}|{sup s}> or <|{rvec r}-{rvec q}|{sup s}> over the unit n-cube (or n-box) - have over three decades been occasionally given closed forms for isolated n,s. By employing experimental mathematics together with a new, global analytic strategy, we prove that for n {le} 4 dimensions the box integrals are for any integer s hypergeometrically closed in a sense we clarify herein. For n = 5 dimensions, we show that a single unresolved integral we call K{sub 5} stands in the way of such hyperclosure proofs. We supply a compendium of exemplary closed forms that naturally arise algorithmically from this theory.
Date: June 25, 2009
Creator: Bailey, David H.; Borwein, J. M. & Crandall, R. E.
Object Type: Report
System: The UNT Digital Library
Calculation of Lifecycle Greenhouse Gas Emissions for the Renewable Fuel Standard (open access)

Calculation of Lifecycle Greenhouse Gas Emissions for the Renewable Fuel Standard

The Energy Independence and Security Act of 2007 (EISA) significantly expanded the renewable fuel standard (RFS) established in the Energy Policy Act of 2005. EISA requires an increasing amount of the 36 billion gallons of renewable fuel by 2022 mandate be met with "advanced biofuels." This report defines the classification "biofuels," discusses the ongoing debate regarding several aspects of biofuels endeavors, and discusses related legislative efforts on climate change policy and low-carbon fuel standards.
Date: June 25, 2009
Creator: Yacobucci, Brent D. & Bracmort, Kelsi S.
Object Type: Report
System: The UNT Digital Library
Calculation of Lifecycle Greenhouse Gas Emissions for the Renewable Fuel Standard (open access)

Calculation of Lifecycle Greenhouse Gas Emissions for the Renewable Fuel Standard

The Energy Independence and Security Act of 2007 (EISA, P.L. 110-140), significantly expanded the renewable fuel standard (RFS) established in the Energy Policy Act of 2005 (EPAct 2005, P.L. 109-58). The RFS requires the use of 9.0 billion gallons of renewable fuel in 2008, increasing to 36 billion gallons in 2022.
Date: June 25, 2009
Creator: Yacobucci, Brent D. & Bracmort, Kelsi
Object Type: Report
System: The UNT Digital Library
Combating Nuclear Smuggling: Lessons Learned from DHS Testing of Advanced Radiation Detection Portal Monitors (open access)

Combating Nuclear Smuggling: Lessons Learned from DHS Testing of Advanced Radiation Detection Portal Monitors

Testimony issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security's (DHS) Domestic Nuclear Detection Office (DNDO) is responsible for addressing the threat of nuclear smuggling. Radiation detection portal monitors are key elements in the nation's defenses against such threats. DHS has sponsored testing to develop new monitors, known as advanced spectroscopic portal (ASP) monitors, to replace radiation detection equipment being used at ports of entry. DNDO expects that ASPs may offer improvements over current-generation portal monitors, particularly the potential to identify as well as detect radioactive material and thereby to reduce both the risk of missed threats and the rate of innocent alarms, which DNDO considers to be key limitations of radiation detection equipment currently used by Customs and Border Protection (CBP) at U.S. ports of entry. However, ASPs cost significantly more than current generation portal monitors. Due to concerns about ASPs' cost and performance, Congress has required that the Secretary of Homeland Security certify that ASPs provide a significant increase in operational effectiveness before obligating funds for full-scale ASP procurement. This testimony addresses (1) GAO findings on DNDO's latest round of ASP testing, and (2) lessons from ASP testing that can be …
Date: June 25, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Corporate Crime: Preliminary Observations on DOJ's Use and Oversight of Deferred Prosecution and Non-Prosecution Agreements (open access)

Corporate Crime: Preliminary Observations on DOJ's Use and Oversight of Deferred Prosecution and Non-Prosecution Agreements

Testimony issued by the Government Accountability Office with an abstract that begins "Recent cases of corporate fraud and mismanagement heighten the Department of Justice's (DOJ) need to appropriately punish and deter corporate crime. Recently, DOJ has made more use of deferred prosecution and non-prosecution agreements (DPAs and NPAs), in which prosecutors may require company reform, among other things, in exchange for deferring prosecution, and may also require companies to hire an independent monitor to oversee compliance. This testimony provides preliminary observations on (1) factors DOJ considers when deciding whether to enter into a DPA or NPA and setting the terms of the agreements, (2) methods DOJ uses to oversee companies' compliance, (3) processes by which monitors are selected, and (4) companies' perspectives regarding the costs and role of the monitor. It also includes the results of GAO's recently completed work on DOJ's efforts to document the monitor selection process (discussed in objective 3). GAO reviewed DOJ guidance and 57 of the 140 agreements negotiated from 1993 (when the first 2 were signed) through May 2009; and interviewed DOJ officials, officials from 17 companies, and 6 monitors. While not generalizable, these results provide insight into decisions about DPAs and NPAs."
Date: June 25, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Corrosive Resistant Diamond Coatings for the Acid Based Thermo-Chemical Hydrogen Cycles (open access)

Corrosive Resistant Diamond Coatings for the Acid Based Thermo-Chemical Hydrogen Cycles

This project was designed to test diamond, diamond-like and related materials in environments that are expected in thermochemical cycles. Our goals were to build a High Temperature Corrosion Resistance (HTCR) test stand and begin testing the corrosive properties of barious materials in a high temperature acidic environment in the first year. Overall, we planned to test 54 samples each of diamond and diamond-like films (of 1 cm x 1 cm area). In addition we use a corrosion acceleration method by treating the samples at a temperature much larger than the expected operating temperature. Half of the samples will be treated with boron using the FEDOA process.
Date: June 25, 2009
Creator: Prelas, Mark A.
Object Type: Report
System: The UNT Digital Library
Cost-Effectiveness and Impact Analysis of Adoption of Standard 90.1-2007 for New York State (open access)

Cost-Effectiveness and Impact Analysis of Adoption of Standard 90.1-2007 for New York State

This report is a subset of the commercial nationwide building energy code analysis. New York has cost criteria that must also be met, and this report includes those details. This report will be finalized when the nationwide analysis report is finalized in September.
Date: June 25, 2009
Creator: Halverson, Mark A.; Gowri, Krishnan & Bartlett, Rosemarie
Object Type: Report
System: The UNT Digital Library
Cybersecurity: Continued Federal Efforts Are Needed to Protect Critical Systems and Information (open access)

Cybersecurity: Continued Federal Efforts Are Needed to Protect Critical Systems and Information

Testimony issued by the Government Accountability Office with an abstract that begins "Federal laws and policy have assigned important roles and responsibilities to the Department of Homeland Security (DHS) and the National Institute of Standards and Technology (NIST) for securing computer networks and systems. DHS is charged with coordinating the protection of computer-reliant critical infrastructure--much of which is owned by the private sector--and securing its own computer systems, while NIST is responsible for developing standards and guidelines for implementing security controls over information and information systems. GAO was asked to describe cybersecurity efforts at DHS and NIST--including partnership activities with the private sector--and the use of cybersecurity performance metrics in the federal government. To do so, GAO relied on its reports on federal information security and federal efforts to fulfill national cybersecurity responsibilities."
Date: June 25, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Defense Logistics: Information on the Test and Evaluation and Assignment and Cancellation of National Stock Numbers as It Relates to MILITEC-1 (open access)

Defense Logistics: Information on the Test and Evaluation and Assignment and Cancellation of National Stock Numbers as It Relates to MILITEC-1

Correspondence issued by the Government Accountability Office with an abstract that begins "The purpose of this letter is to respond to Congressional request for information regarding the test and evaluation process conducted by the Department of Defense (DOD) of a specific synthetic lubricant called MILITEC-1 that is produced by Militec, Inc., and the assignment and cancellation of national stock numbers2 (NSN) associated with that product. Militec, Inc., has challenged DOD decisions not to include MILITEC-1 in the federal supply system. Specifically, we examined (1) the extent to which the military services have tested and evaluated MILITEC-1 as a small arms lubricant, as a metal conditioner, as a general purpose lubricant, and as a lubricant additive, and with what results; and (2) the extent to which the Defense Logistics Agency (DLA) followed applicable DOD procedures in assigning and subsequently canceling national stock numbers to MILITEC-1. In addition, we are providing in enclosure I a timeline on the efforts to test and evaluate, and assign and cancel, NSNs for MILITEC-1. MILITEC-1 is a dry, impregnated, synthetic-based metal conditioner that, at the time of our review, has been primarily marketed as a small arms lubricant, although it is also marketed as an automotive …
Date: June 25, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Highway Trust Fund: Options for Improving Sustainability and Mechanisms to Manage Solvency (open access)

Highway Trust Fund: Options for Improving Sustainability and Mechanisms to Manage Solvency

Testimony issued by the Government Accountability Office with an abstract that begins "The Highway Account within the Highway Trust Fund (HTF) is the principal means for funding federal highway programs. Administered by the Federal Highway Administration (FHWA) within the Department of Transportation (DOT), it channels about $33 billion in highway user excise taxes annually to states for highway and related spending. Estimated outlays from the Highway Account under the Safe, Accountable, Flexible, Efficient Transportation Equity Act--A Legacy for Users (SAFETEA-LU) exceeded estimated receipts throughout the authorization period--fiscal years 2005 through 2009. Furthermore, actual account receipts were lower than had been estimated and the account balance dropped more rapidly than anticipated, approaching zero in August, 2008. Congress subsequently approved legislation in September 2008 to appropriate $8 billion from the General Fund of the Treasury to replenish the account. Agency officials anticipate the account will reach a critical stage again before the end of fiscal year 2009, and estimate that about $15 billion will be needed to ensure account solvency through the end of fiscal year 2010. This statement summarizes GAO's past work on 1) the collection and distribution process for the Highway Account of the HTF, 2) options for improving long-term …
Date: June 25, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Human Capital: Continued Monitoring of Internal Safeguards and an Action Plan to Address Employee Concerns Could Improve Implementation of the National Security Personnel System (open access)

Human Capital: Continued Monitoring of Internal Safeguards and an Action Plan to Address Employee Concerns Could Improve Implementation of the National Security Personnel System

A statement of record issued by the Government Accountability Office with an abstract that begins "DOD is in the process of implementing this human capital system, and according to DOD, about 212,000 civilian employees are currently under the system. On February 11, 2009, however, the House Armed Services Committee and its Subcommittee on Readiness asked DOD to halt conversions of any additional employees to NSPS until the administration and Congress could properly address the future of DOD's personnel management system. On March 16, 2009, DOD and the Office of Personnel Management (OPM) announced an upcoming review of NSPS policies, regulations, and practices. According to DOD, the department has delayed any further transitions of employees into NSPS until at least October 2009--pending the outcome of its review. Furthermore, on May 14, 2009, the Deputy Secretary of Defense asked the Defense Business Board to form what has become this task group to review NSPS to help the department determine, among others things, whether NSPS is operating in a fair, transparent, and effective manner. This statement focuses on the performance management aspect of NSPS specifically (1) the extent to which DOD has implemented internal safeguards to ensure the fairness, effectiveness, and credibility of …
Date: June 25, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Internal Revenue Service: Status of GAO Financial Audit and Related Financial Management Report Recommendations (open access)

Internal Revenue Service: Status of GAO Financial Audit and Related Financial Management Report Recommendations

A letter report issued by the Government Accountability Office with an abstract that begins "In its role as the nation's tax collector, the Internal Revenue Service (IRS) has a demanding responsibility to annually collect trillions of dollars in taxes, process hundreds of millions of tax and information returns, and enforce the nation's tax laws. Since its first audit of IRS's financial statements in fiscal year 1992, GAO has identified a number of weaknesses in IRS's financial management operations. In related reports, GAO has recommended corrective actions to address those weaknesses. Each year, as part of the annual audit of IRS's financial statements, GAO makes recommendations to address any new weaknesses identified and follows up on the status of IRS's efforts to address the weaknesses GAO identified in previous years' audits. The purpose of this report is to (1) provide the status of audit recommendations and actions needed to fully address them and (2) demonstrate how the recommendations relate to control activities central to IRS's mission and goals."
Date: June 25, 2009
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
The MACHO Project HST Follow-Up: The Large Magellanic Cloud Microlensing Source Stars (open access)

The MACHO Project HST Follow-Up: The Large Magellanic Cloud Microlensing Source Stars

We present Hubble Space Telescope (HST) WFPC2 photometry of 13 microlensed source stars from the 5.7 year Large Magellanic Cloud (LMC) survey conducted by the MACHO Project. The microlensing source stars are identified by deriving accurate centroids in the ground-based MACHO images using difference image analysis (DIA) and then transforming the DIA coordinates to the HST frame. None of these sources is coincident with a background galaxy, which rules out the possibility that the MACHO LMC microlensing sample is contaminated with misidentified supernovae or AGN in galaxies behind the LMC. This supports the conclusion that the MACHO LMC microlensing sample has only a small amount of contamination due to non-microlensing forms of variability. We compare the WFPC2 source star magnitudes with the lensed flux predictions derived from microlensing fits to the light curve data. In most cases the source star brightness is accurately predicted. Finally, we develop a statistic which constrains the location of the Large Magellanic Cloud (LMC) microlensing source stars with respect to the distributions of stars and dust in the LMC and compare this to the predictions of various models of LMC microlensing. This test excludes at {approx}> 90% confidence level models where more than 80% of …
Date: June 25, 2009
Creator: Nelson, C. A.; Drake, A. J.; Cook, K. H.; Bennett, D. P.; Popowski, P.; Dalal, N. et al.
Object Type: Article
System: The UNT Digital Library
Measurement of the angle alpha at BABAR (open access)

Measurement of the angle alpha at BABAR

The authors present recent measurements of the CKM angle {alpha} using data collected by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at the SLAC National Accelerator Laboratory, operating at the {Upsilon}(4S) resonance. They present constraints on {alpha} from B {yields} {pi}{pi}, B {yields} {rho}{rho} and B {yields} {rho}{pi} decays.
Date: June 25, 2009
Creator: Perez, A.
Object Type: Article
System: The UNT Digital Library
NEW APPROACH TO ADDRESSING GAS GENERATION IN RADIOACTIVE MATERIAL PACKAGING (open access)

NEW APPROACH TO ADDRESSING GAS GENERATION IN RADIOACTIVE MATERIAL PACKAGING

Safety Analysis Reports for Packaging (SARP) document why the transportation of radioactive material is safe in Type A(F) and Type B shipping containers. The content evaluation of certain actinide materials require that the gas generation characteristics be addressed. Most packages used to transport actinides impose extremely restrictive limits on moisture content and oxide stabilization to control or prevent flammable gas generation. These requirements prevent some users from using a shipping container even though the material to be shipped is fully compliant with the remaining content envelope including isotopic distribution. To avoid these restrictions, gas generation issues have to be addressed on a case by case basis rather than a one size fits all approach. In addition, SARP applicants and review groups may not have the knowledge and experience with actinide chemistry and other factors affecting gas generation, which facility experts in actinide material processing have obtained in the last sixty years. This paper will address a proposal to create a Gas Generation Evaluation Committee to evaluate gas generation issues associated with Safety Analysis Reports for Packaging material contents. The committee charter could include reviews of both SARP approved contents and new contents not previously evaluated in a SARP.
Date: June 25, 2009
Creator: Watkins, R; Leduc, D & Askew, N
Object Type: Article
System: The UNT Digital Library
Recent Results From BaBar in Tau Physics (open access)

Recent Results From BaBar in Tau Physics

The BaBar collaboration has accumulated over 400 million {tau}-pairs which can be used to study charged leptonic and hadronic weak currents to unprecedented precision. This note presents results on lepton universality, measurements of |V{sub us}|, and searches for {tau} decays which violate lepton flavour conservation, or {tau} decays that proceed through a suppressed second class current.
Date: June 25, 2009
Creator: Lewczuk, Mateusz
Object Type: Article
System: The UNT Digital Library
REVERSIBLE AND IRREVERSIBLE PASSIVATION OF A LA-NI-AL ALLOY (open access)

REVERSIBLE AND IRREVERSIBLE PASSIVATION OF A LA-NI-AL ALLOY

This paper seeks to explore some of the effects of passivating a LaNi{sub 4.25}Al{sub 0.75} sample by air oxidation under controlled conditions. Passivation of this metal hydride alloy seems to have two distinct regimes. The first occurs with air oxidation at 80 C and 20 C. It is characterized by complete reversibility upon hydrogen readsorption, although said readsorption is hindered substantially at room temperature, requiring the material to be heated to produce the reactivation. The second regime is illustrated by 130 C air oxidation and is characterized by irreversible loss of hydrogen absorption capacity. This passivation does not hinder hydrogen readsorption into the remaining hydride material.
Date: June 25, 2009
Creator: Shanahan, K. & Klein, J.
Object Type: Article
System: The UNT Digital Library
Structural Analyses of Fuel Casks Subjected to Bolt Preload, Internal Pressure and Sequential Dynamic Impacts (open access)

Structural Analyses of Fuel Casks Subjected to Bolt Preload, Internal Pressure and Sequential Dynamic Impacts

Large fuel casks subjected to the combined loads of closure bolt tightening, internal pressure and sequential dynamic impacts present challenges when evaluating their performance in the Hypothetical Accident Conditions (HAC) specified in the Code of Federal Regulations Title 10 Part 71 (10CFR71). Testing is often limited by cost, difficulty in preparing test units and the limited availability of facilities which can carry out such tests. In the past, many casks were evaluated without testing by using simplified analytical methods. In addition, there are no realistic analyses of closure bolt stresses for HAC conditions reported in the open literature. This paper presents a numerical technique for analyzing the accumulated damages of a large fuel cask caused by the sequential loads of the closure bolt tightening and the internal pressure as well as the drop and crash dynamic loads. The bolt preload and the internal pressure are treated as quasi-static loads so that the finite element method with explicit numerical integration scheme based on the theory of wave propagation can be applied. The dynamic impacts with short durations such as the 30-foot drop and the 40-inch puncture for the hypothetical accident conditions specified in 10CFR71 are also analyzed by using the finite-element …
Date: June 25, 2009
Creator: Wu, T.
Object Type: Article
System: The UNT Digital Library
A Supernodal Approach to Incomplete LU Factorization with Partial Pivoting (open access)

A Supernodal Approach to Incomplete LU Factorization with Partial Pivoting

We present a new supernode-based incomplete LU factorization method to construct a preconditioner for solving sparse linear systems with iterative methods. The new algorithm is primarily based on the ILUTP approach by Saad, and we incorporate a number of techniques to improve the robustness and performance of the traditional ILUTP method. These include the new dropping strategies that accommodate the use of supernodal structures in the factored matrix. We present numerical experiments to demonstrate that our new method is competitive with the other ILU approaches and is well suited for today's high performance architectures.
Date: June 25, 2009
Creator: Li, Xiaoye Sherry & Shao, Meiyue
Object Type: Article
System: The UNT Digital Library
TANK FARM INTERIM SURFACE BARRIER MATERIALS AND RUNOFF ALTERNATIVES STUDY (open access)

TANK FARM INTERIM SURFACE BARRIER MATERIALS AND RUNOFF ALTERNATIVES STUDY

This report identifies candidate materials and concepts for interim surface barriers in the single-shell tank farms. An analysis of these materials for application to the TY tank farm is also provided.
Date: June 25, 2009
Creator: MJ, HOLM
Object Type: Report
System: The UNT Digital Library
Thorough characterization of a EUV mask (open access)

Thorough characterization of a EUV mask

We reported that we were successful in our 45nm technology node device demonstration in February 2008 and 22nm node technology node device patterning in February 2009 using ASML's Alpha Demo Tool (ADT). In order to insert extreme ultraviolet (EUV) lithography at the 15nm technology node and beyond, we have thoroughly characterized one EUV mask, a so-called NOVACD mask. In this paper, we report on three topics, The first topic is an analysis of line edge roughness (LER) using a mask Scanning Electron Microscope (SEM), an Atomic Force Microscope (AFM) and the Actinic Inspection Tool (AIT) to compare resist images printed with the ASML ADT. The results of the analysis show a good correlation between the mask AFM and the mask SEM measurements, However, the resist printing results for the isolated space patterns are slightly different. The cause ofthis discrepancy may be resist blur, image log slope and SEM image quality and so on. The second topic is an analysis of mask topography using an AFM and relative reflectivity of mirror and absorber surface using the AIT, The AFM data show 6 and 7 angstrom rms roughness for mirror and absorber, respectively. The reflectivity measurements show that the mirror reflects EUV …
Date: June 25, 2009
Creator: Mizuno, H.; McIntyre, G.; Koay, C.-W.; Burkhardt, M.; He, L.; Hartley, J. et al.
Object Type: Article
System: The UNT Digital Library
The Use of Weighting in Periodicity Searches in All-Sky Monitor Data: Applications to the GLAST LAT (open access)

The Use of Weighting in Periodicity Searches in All-Sky Monitor Data: Applications to the GLAST LAT

The light curves produced by all-sky monitors, such as the Rossi X-ray Timing Explorer All-Sky Monitor and the Swift Burst Alert Telescope (BAT), generally have non-uniform error bars. In searching for periodic modulation in this type of data using power spectra it can be important to use appropriate weighting of data points to achieve the best sensitivity. It was recently demonstrated that for Swift BAT data a simple weighting scheme can actually sometimes reduce the sensitivity of the power spectrum depending on source brightness. Instead, a modified weighting scheme, based on the Cochran semi-weighted mean, gives improved results independent of source brightness. We investigate the benefits of weighting power spectra in period searches using simulated GLAST LAT observations of {gamma}-ray binaries.
Date: June 25, 2009
Creator: Corbet, Robin & Dubois, Richard
Object Type: Article
System: The UNT Digital Library
Assistance to Firefighters Program (open access)

Assistance to Firefighters Program

This report is about the assistance to firefighters program, also called as the FIRE act grant program. established by the National Defense Authorization Act.
Date: June 25, 2008
Creator: Kruger, Lennard G.
Object Type: Report
System: The UNT Digital Library
Border Security: State Department Expects to Meet Projected Surge in Demand for Visas and Passports in Mexico (open access)

Border Security: State Department Expects to Meet Projected Surge in Demand for Visas and Passports in Mexico

Testimony issued by the Government Accountability Office with an abstract that begins "The U.S. Mission in Mexico is the Department of State's largest consular operation. In fiscal year 2007, it processed 1.5 million of the 8 million nonimmigrant visas (NIV) State handled worldwide. The U.S. Mission in Mexico also provided services, including passport processing and emergency assistance, to 20,000 American citizens in fiscal year 2007. This already significant consular workload is expected to increase dramatically in the coming years as millions of NIV Border Crossing Cards issued in Mexico between fiscal years 1998 and 2002 expire and need to be renewed. In addition, the implementation of new travel requirements under the Western Hemisphere Travel Initiative (WHTI) will, for the first time, require U.S. citizens to carry passports, or other approved documentation, when traveling between the United States and Mexico. This testimony addresses (1) State's estimates of the workload for consulates in Mexico through 2012 resulting from, in particular, new travel requirements and the reissue of Border Crossing Cards; and (2) the actions State has taken to ensure consulates in Mexico keep pace with projected workload increases through 2012. This testimony is based on work currently in process that involves analyzing …
Date: June 25, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library