In Situ Microbial Community Control of the Stability of Bio-reduced Uranium (open access)

In Situ Microbial Community Control of the Stability of Bio-reduced Uranium

In aerobic aquifers typical of many Department of Energy (DOE) legacy waste sites, uranium is present in the oxidized U(VI) form which is more soluble and thus more mobile. Field experiments at the Old Rifle UMTRA site have demonstrated that biostimulation by electron donor addition (acetate) promotes biological U(VI) reduction (2). However, U(VI) reduction is reversible and oxidative dissolution of precipitated U(IV) after the cessation of electron donor addition remains a critical issue for the application of biostimulation as a treatment technology. Despite the potential for oxidative dissolution, field experiments at the Old Rifle site have shown that rapid reoxidation of bio-reduced uranium does not occur and U(VI) concentrations can remain at approximately 20% of background levels for more than one year. The extent of post-amendment U(VI) removal and the maintenance of bioreduced uranium may result from many factors including U(VI) sorption to iron-containing mineral phases, generation of H2S or FeS0.9, or the preferential sorption of U(VI) by microbial cells or biopolymers, but the processes controlling the reduction and in situ reoxidation rates are not known. To investigate the role of microbial community composition in the maintenance of bioreduced uranium, in-well sediment incubators (ISIs) were developed allowing field deployment of …
Date: March 28, 2008
Creator: Baldwin, Brett, R.; Peacock, Aaron, D.; Resch, Charles, T.; Arntzen, Evan; Smithgall, Amanda, N.; Pfiffner, Susan et al.
Object Type: Report
System: The UNT Digital Library
Investigation of Electron Transfer-Based Photonic and Electro-Optic Materials and Devices (open access)

Investigation of Electron Transfer-Based Photonic and Electro-Optic Materials and Devices

Montana’s state program began its sixth year in 2006. The project’s research cluster focused on physical, chemical, and biological materials that exhibit unique electron-transfer properties. Our investigators have filed several patents and have also have established five spin-off businesses (3 MSU, 2 UM) and a research center (MT Tech). In addition, this project involved faculty and students at three campuses (MSU, UM, MT Tech) and has a number of under-represented students, including 10 women and 5 Native Americans. In 2006, there was an added emphasis on exporting seminars and speakers via the Internet from UM to Chief Dull Knife Community College, as well as work with the MT Department of Commerce to better educate our faculty regarding establishing small businesses, licensing and patent issues, and SBIR program opportunities.
Date: March 28, 2008
Creator: Bromenshenk, Jerry J; Abbott, Edwin H; Dickensheets, David; Donovan, Richard P; Hobbs, J D; Spangler, Lee et al.
Object Type: Report
System: The UNT Digital Library
Influence of Time-Dependent Factors in the Evaluation of Critical Infrastructure Protection Measures. (open access)

Influence of Time-Dependent Factors in the Evaluation of Critical Infrastructure Protection Measures.

The examination of which protective measures are the most appropriate to be implemented in order to prevent, protect against, respond to, and recover from attacks on critical infrastructures and key resources typically involves a comparison of the consequences that could occur when the protective measure is implemented to those that could occur when it is not. This report describes a framework for evaluation that provides some additional capabilities for comparing optional protective measures. It illustrates some potentially important time-dependent factors, such as the implementation rate, that affect the relative pros and cons associated with widespread implementation of protective measures. It presents example results from the use of protective measures, such as detectors and pretrained responders, for an illustrative biological incident. Results show that the choice of an alternative measure can depend on whether or not policy and financial support can be maintained for extended periods of time. Choice of a time horizon greatly influences the comparison of alternatives.
Date: March 28, 2008
Creator: Buehring, W. A.; Samsa, M. E. & Sciences, Decision and Information
Object Type: Report
System: The UNT Digital Library
Tariff-based analysis of commercial building electricityprices (open access)

Tariff-based analysis of commercial building electricityprices

This paper presents the results of a survey and analysis ofelectricity tariffs and marginal electricity prices for commercialbuildings. The tariff data come from a survey of 90 utilities and 250tariffs for non-residential customers collected in 2004 as part of theTariff Analysis Project at LBNL. The goals of this analysis are toprovide useful summary data on the marginal electricity prices commercialcustomers actually see, and insight into the factors that are mostimportant in determining prices under different circumstances. We providea new, empirically-based definition of several marginal prices: theeffective marginal price and energy-only anddemand-only prices, andderive a simple formula that expresses the dependence of the effectivemarginal price on the marginal load factor. The latter is a variable thatcan be used to characterize the load impacts of a particular end-use orefficiency measure. We calculate all these prices for eleven regionswithin the continental U.S.
Date: March 28, 2008
Creator: Coughlin, Katie M.; Bolduc, Chris A.; Rosenquist, Greg J.; VanBuskirk, Robert D. & McMahon, James E.
Object Type: Report
System: The UNT Digital Library
Restoration of Weak Phase-Contrast Images Recorded With a High Degree of Defocus: The "Twin Image" Problem Associated With CTF Correction (open access)

Restoration of Weak Phase-Contrast Images Recorded With a High Degree of Defocus: The "Twin Image" Problem Associated With CTF Correction

Relatively large values of objective-lens defocus must normally be used to produce detectable levels of image contrast for unstained biological specimens, which are generally weak phase objects. As a result, a subsequent restoration operation must be used to correct for oscillations in the contrast transfer function (CTF) at higher resolution. Currently used methods of CTF-correction assume the ideal case in which Friedel mates in the scattered wave have contributed pairs of Fourier components that overlap with one another in the image plane. This"ideal" situation may be only poorly satisfied, or not satisfied at all, as the particle size gets smaller, the defocus value gets larger, and the resolution gets higher. We have therefore investigated whether currently used methods of CTF correction are also effective in restoring the single-sideband image information that becomes displaced (delocalized) by half (or more) the diameter of a particle of finite size. Computer simulations are used to show that restoration either by"phase flipping" or by multiplying by the CTF recovers only about half of the delocalized information. The other half of the delocalized information goes into a doubly defocused"twin" image of the type produced during optical reconstruction of an in-line hologram. Restoration with a Wiener filter …
Date: March 28, 2008
Creator: Downing, Kenneth H. & Glaeser, Robert M.
Object Type: Article
System: The UNT Digital Library
Pacific Northwest National Laboratory Apatite Investigation at the 100-NR-2 Quality Assurance Project Plan (open access)

Pacific Northwest National Laboratory Apatite Investigation at the 100-NR-2 Quality Assurance Project Plan

This Quality Assurance Project Plan provides the quality assurance requirements and processes that will be followed by staff working on the 100-NR-2 Apatite Project. The U.S. Department of Energy, Fluor Hanford, Inc., Pacific Northwest National Laboratory, and the Washington Department of Ecology agreed that the long-term strategy for groundwater remediation at 100-N would include apatite sequestration as the primary treatment, followed by a secondary treatment. The scope of this project covers the technical support needed before, during, and after treatment of the targeted subsurface environment using a new high-concentration formulation.
Date: March 28, 2008
Creator: Fix, N. J.
Object Type: Report
System: The UNT Digital Library
Medicaid Financing (open access)

Medicaid Financing

This report provides background information on Medicaid financing and a discussion of current issues. Last year, Congress placed temporary moratoriums on the implementation of four controversial regulations that anticipate large reductions in federal spending for Medicaid.
Date: March 28, 2008
Creator: Grady, April
Object Type: Report
System: The UNT Digital Library
Use beam steering dipoles to minimize aberrations associated with off-centered transit through the induction bunching module. Design an improved NDCX-I drift compression section to make best use of the new bunching module to optimize planned initial NDCX-I target experiments (open access)

Use beam steering dipoles to minimize aberrations associated with off-centered transit through the induction bunching module. Design an improved NDCX-I drift compression section to make best use of the new bunching module to optimize planned initial NDCX-I target experiments

This milestone has been met by: (1) calculating steering solutions and implementing them in the experiment using the three pairs of crossed magnetic dipoles installed in between the matching solenoids, S1-S4. We have demonstrated the ability to center the beam position and angle to<1 mm and<1 mrad upstream of the induction bunching module (IBM) gap, compared to uncorrected beam offsets of several millimeters and milli-radians. (2) Based on LSP and analytic study, the new IBM, which has twice the volt-seconds of our first IBM, should be accompanied by a longer drift compression section in order to achieve a predicted doubling of the energy deposition on future warm-dense matter targets. This will be accomplished by constructing a longer ferro-electric plasma source. (3) Because the bunched current is a function of the longitudinal phase space and emittance of the beam entering the IBM we have characterized the longitudinal phase space with a high-resolution energy analyzer.
Date: March 28, 2008
Creator: HIFS-VNL; Seidl, Peter; Seidl, P.; Barnard, J.; Bieniosek, F.; Coleman, J. et al.
Object Type: Report
System: The UNT Digital Library
EnergyPlus Analysis Capabilities for Use in California Building Energy Efficiency Standards Development and Compliance Calculations (open access)

EnergyPlus Analysis Capabilities for Use in California Building Energy Efficiency Standards Development and Compliance Calculations

California has been using DOE-2 as the main building energy analysis tool in the development of building energy efficiency standards (Title 24) and the code compliance calculations. However, DOE-2.1E is a mature program that is no longer supported by LBNL on contract to the USDOE, or by any other public or private entity. With no more significant updates in the modeling capabilities of DOE-2.1E during recent years, DOE-2.1E lacks the ability to model, with the necessary accuracy, a number of building technologies that have the potential to reduce significantly the energy consumption of buildings in California. DOE-2's legacy software code makes it difficult and time consuming to add new or enhance existing modeling features in DOE-2. Therefore the USDOE proposed to develop a new tool, EnergyPlus, which is intended to replace DOE-2 as the next generation building simulation tool. EnergyPlus inherited most of the useful features from DOE-2 and BLAST, and more significantly added new modeling capabilities far beyond DOE-2, BLAST, and other simulations tools currently available. With California's net zero energy goals for new residential buildings in 2020 and for new commercial buildings in 2030, California needs to evaluate and promote currently available best practice and emerging technologies to …
Date: March 28, 2008
Creator: Hong, Tianzhen; Buhl, Fred & Haves, Philip
Object Type: Report
System: The UNT Digital Library
Financial Turmoil: Federal Reserve Policy Responses (open access)

Financial Turmoil: Federal Reserve Policy Responses

This report provides information about the Federal Reserve Policy Responses on Financial Turmoil. The federal reserve has been central in the response to the current financial turmoil.
Date: March 28, 2008
Creator: Labonte, Marc
Object Type: Report
System: The UNT Digital Library
The Voting Rights Act of 1965, As Amended: Its History and Current Issues (open access)

The Voting Rights Act of 1965, As Amended: Its History and Current Issues

This report also addresses allegations of voting irregularities and of violations of the Voting Rights Act (VRA) during the presidential election of 2000.
Date: March 28, 2008
Creator: Laney, Garrine P.
Object Type: Report
System: The UNT Digital Library
Public Transit Program Issues in Surface Transportation Reauthorization (open access)

Public Transit Program Issues in Surface Transportation Reauthorization

None
Date: March 28, 2008
Creator: Mallett, William J.
Object Type: Report
System: The UNT Digital Library
Science, Engineering, and Mathematics Education: Status and Issues (open access)

Science, Engineering, and Mathematics Education: Status and Issues

None
Date: March 28, 2008
Creator: Matthews, Christine M.
Object Type: Report
System: The UNT Digital Library
HYDROGEN EFFECTS ON THE FRACTURE TOUGHNESS PROPERTIES OF FORGED STAINLESS STEELS (open access)

HYDROGEN EFFECTS ON THE FRACTURE TOUGHNESS PROPERTIES OF FORGED STAINLESS STEELS

The effect of hydrogen on the fracture toughness properties of Types 304L, 316L and 21-6-9 forged stainless steels was investigated. Fracture toughness samples were fabricated from forward-extruded forgings. Samples were uniformly saturated with hydrogen after exposure to hydrogen gas at 34 MPa or 69 and 623 K prior to testing. The fracture toughness properties were characterized by measuring the J-R behavior at ambient temperature in air. The results show that the hydrogen-charged steels have fracture toughness values that were about 50-60% of the values measured for the unexposed steels. The reduction in fracture toughness was accompanied by a change in fracture appearance. Both uncharged and hydrogen-charged samples failed by microvoid nucleation and coalescence, but the fracture surfaces of the hydrogen-charged steels had smaller microvoids. Type 316L stainless steel had the highest fracture toughness properties and the greatest resistance to hydrogen degradation.
Date: March 28, 2008
Creator: Morgan, M
Object Type: Article
System: The UNT Digital Library
Medicare: History of Part A Trust Fund Insolvency Projections (open access)

Medicare: History of Part A Trust Fund Insolvency Projections

This Congressional Research Service Report for Congress contains part A of Medicare (HI or Hospital Insurance) and insolvency projections pertaining to this portion of the Medicare trust fund.
Date: March 28, 2008
Creator: O'Sullivan, Jennifer
Object Type: Report
System: The UNT Digital Library
SEQUESTRATION AND TREATMENT OF VADOSE ZONE SOLVENTS USING EDIBLE OILS (open access)

SEQUESTRATION AND TREATMENT OF VADOSE ZONE SOLVENTS USING EDIBLE OILS

Edible oils have emerged as an effective treatment amendment for a variety of contaminants. When applied to chlorinated volatile organic compounds (cVOCs) in the saturated zone, edible oils have been shown to enhance anaerobic bioremediation and sequester the contaminants. However, edible oils have not been applied to the vadose zone for contaminant treatment. Soybean oil was injected into the vadose zone in M-Area at the Department of Energy's (DOE) Savannah River Site (SRS) as a research study to evaluate the effectiveness of edible oils for solvent sequestration and the ability to change a vadose system from aerobic to anaerobic to initiate reductive dechlorination. The proposed use of this technique would be an enhanced attenuation/transition step after active remediation. The goals of the research were to evaluate oil emplacement methods and monitoring techniques to measure oil placement, partitioning and degradation. Gas sampling was the cornerstone for this evaluation. Analyses for cVOCs and biotransformation products were performed. Overall, the cVOC concentration/flux reduction was 75-85% in this vadose zone setting. Destruction of the cVOCs by biotic or abiotic process has not yet been verified at this site. No reductive dechlorination products have been measured. The deployment has resulted in a substantial generation of …
Date: March 28, 2008
Creator: Riha, B; Brian02 Looney, B & Richard Hall (NOEMAIL), R
Object Type: Article
System: The UNT Digital Library
Distributed Wireless Multi-Sensor Technologies, A Novel Approach to Reduce Motor Energy Usage (open access)

Distributed Wireless Multi-Sensor Technologies, A Novel Approach to Reduce Motor Energy Usage

This report is the final report for the General Electric Distributed Wireless Multi-Sensor Technologies project. The report covers the research activities and benefits surrounding wireless technology used for industrial sensing applications. The main goal of this project was to develop wireless sensor technology that would be commercialized and adopted by industry for a various set of applications. Many of these applications will yield significant energy savings. One application where there was significant information to estimate a potential energy savings was focused on equipment condition monitoring and in particular electric motor monitoring. The results of the testing of the technology developed are described in this report along with the commercialization activities and various new applications and benefits realized.
Date: March 28, 2008
Creator: Sexton, Daniel
Object Type: Report
System: The UNT Digital Library
Texas Register, Volume 33, Number 13, Pages 2621-2752, March 28, 2008 (open access)

Texas Register, Volume 33, Number 13, Pages 2621-2752, March 28, 2008

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: March 28, 2008
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Comments on the Office of Personnel Management's February 20, 2008 Report to Congress Regarding the Retirement Systems Modernization (open access)

Comments on the Office of Personnel Management's February 20, 2008 Report to Congress Regarding the Retirement Systems Modernization

Correspondence issued by the Government Accountability Office with an abstract that begins "The Office of Personnel Management (OPM) is modernizing the paper-intensive processes and antiquated information systems it uses to support the retirement of civilian federal employees through the Retirement Systems Modernization (RSM) program. In January 2008, we reported on the agency's management of this program, in which we noted concerns and made recommendations for improvement in four key areas: (1) system testing, (2) system defect resolution, (3) program cost estimation, and (4) program earned value management. The explanatory statement of the House Appropriations Committee regarding the fiscal year 2008 Consolidated Appropriations Act directed OPM to submit to Cpngressional Committees and to GAO not later than February 20, 2008, a report of its actions on the four areas of concern that we identified. Further, the explanatory statement directed that GAO provide to Congressional Committees and to OPM our comments on the agency's report."
Date: March 28, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Commonwealth of the Northern Mariana Islands: Pending Legislation Would Apply U.S. Immigration Law to the CNMI with a Transition Period (open access)

Commonwealth of the Northern Mariana Islands: Pending Legislation Would Apply U.S. Immigration Law to the CNMI with a Transition Period

A letter report issued by the Government Accountability Office with an abstract that begins "The Commonwealth of the Northern Mariana Islands (CNMI) is subject to most U.S. laws but, under the terms of its 1976 covenant with the United States, administers its own immigration system. It has applied this flexibility to admit substantial numbers of foreign workers, in addition to admitting tourists and foreign investors. The covenant grants Congress the right to apply federal immigration law to the CNMI. On December 11, 2007, the House of Representatives passed legislation applying U.S. immigration law to the CNMI; as of report issuance, this legislation was pending in the Senate. If passed, it will amend the covenant and will apply federal immigration law to the CNMI 1 year after the legislation's enactment, subject to a transition period that begins 1 year after enactment but may be delayed 180 days. GAO was asked to review key provisions of the pending legislation, current U.S. immigration law, and current CNMI immigration law, particularly regarding (1) foreign workers, (2) tourists, and (3) foreign investors. The Departments of Homeland Security and the Interior generally agreed with the findings in this report, and the Department of Labor provided no …
Date: March 28, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Health Insurance: Most College Students Are Covered through Employer-Sponsored Plans, and Some Colleges and States Are Taking Steps to Increase Coverage (open access)

Health Insurance: Most College Students Are Covered through Employer-Sponsored Plans, and Some Colleges and States Are Taking Steps to Increase Coverage

A letter report issued by the Government Accountability Office with an abstract that begins "College students face challenges obtaining health insurance--they may not have access to insurance through an employer, and as they get older, they may lose dependent coverage obtained through a parent's plan. Federal law ensures continued access to health insurance for some, but not all, such students. Without health insurance, college students may be unable to pay for their health care, and the cost of this care may be passed on to federal and state payers, such as Medicaid. College students may have access to student insurance plans offered by their colleges. GAO was asked to report on uninsured college students, student insurance plans, and efforts to increase the number of insured students. GAO reviewed (1) college students' insurance status, (2) uninsured college students' characteristics, (3) the extent to which colleges offered student insurance plans and the characteristics of available plans, and (4) efforts to increase the number of insured students. GAO analyzed data from a national survey on college students' insurance status and uninsured college students' characteristics. GAO collected data from 340 colleges on the availability of student insurance plans and the characteristics of available plans, …
Date: March 28, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
VA Health Care: Additional Efforts to Better Assess Joint Ventures Needed (open access)

VA Health Care: Additional Efforts to Better Assess Joint Ventures Needed

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Veterans Affairs (VA) and the Department of Defense (DOD) have a long history of partnering to achieve more cost-effective use of health care resources. Their partnerships have evolved to include joint ventures--joint efforts to construct or share medical facilities. VA has maintained eight joint ventures with DOD across the country. VA has also developed partnerships, or affiliations, with university medical schools to obtain health care services for veterans and provide training to medical residents. VA has not entered into a joint venture with an academic affiliate to date. However, several proposals for such joint ventures have surfaced in the last decade. This congressionally requested report discusses the (1) potential benefits and concerns associated with joint ventures and the extent to which they are documented and measured, (2) lessons learned from existing and proposed VA joint ventures, and (3) steps VA has taken to evaluate proposed joint ventures. To address these issues, GAO conducted site visits to and interviews with officials from all existing and proposed joint venture sites."
Date: March 28, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Promontory Facility Plant-wide Energy Assessment (open access)

Promontory Facility Plant-wide Energy Assessment

A 1-year plant-wide assessment at the ATK Promontory manufacturing facility utilizing innovative assessment technologies to identify energy savings opportunities in: steam, water, compressed air, HVAC, utility, production, and building systems.
Date: March 28, 2008
Creator: Weir, Roger M. & Bebb, Deanna, Brown, Herman E.
Object Type: Report
System: The UNT Digital Library
The African Development Bank Group (open access)

The African Development Bank Group

This report discusses the African Development Bank (AfDB) Group, which is a regional development bank (RDB) "dedicated to combating poverty and improving the lives of people of the continent." It comprises three lending facilities: the market rate facility, the AfDB; a concessional lending facility, the African Development Fund; and a trust fund established by Nigeria to lend to low-income African countries. The Bank has 53 African members, as well as 24 non-regional members, including the United States.
Date: March 28, 2008
Creator: Weiss, Martin A.
Object Type: Report
System: The UNT Digital Library