States

Anaerobic bioprocessing of low-rank coals (open access)

Anaerobic bioprocessing of low-rank coals

The overall goal of this project is to find biological methods to remove carboxylic functionalities from low-rank coals and to assess the properties of the modified coal towards coal liquefaction. The main objectives for this quarter were: (1) continuation of microbial consortia development and maintenance, (2) crude enzyme study using best decarboxylating organisms, (3) decarboxylation of lignite, demineralized Wyodak coal and model polymers, and (4) characterization of biotreated coals.
Date: April 15, 1992
Creator: Jain, M. K.; Narayan, R. & Han, O.
Object Type: Report
System: The UNT Digital Library
Electronic states in systems of reduced dimensionality (open access)

Electronic states in systems of reduced dimensionality

This report briefly discusses the following research: magnetically modulated systems, inelastic magnetotunneling, ballistic transport review, screening in reduced dimensions, raman and electron energy loss spectroscopy; and ballistic quantum interference effects. (LSP).
Date: April 15, 1992
Creator: Ulloa, S.E.
Object Type: Report
System: The UNT Digital Library
NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts (open access)

NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts

During this period, we focused our attention in analyzing the magnetic nature of the extensively used trimetallic catalyst system Cu-Co-Cr for the production of higher alcohols. We believe that there could be some correspondence between the catalytic and magnetic behaviors of the transition metal catalyst systems. Both the morphology and metallic charge distribution of the particles are know to govern the catalytic as well as the magnetic properties of the system. Based on this concept, we have extensively examined the Cu/Co system varying Cu/Co ratio from 0.2--4.0. Spectroscopic results are outlined herein. (VC)
Date: April 15, 1992
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Defense Transportation: Progress of MTMC Pilot (open access)

Defense Transportation: Progress of MTMC Pilot

Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the Military Traffic Management Command's (MTMC) first interim progress report on the Department of Defense's demonstration program (MTMC pilot) to improve personal property shipments of the armed forces, focusing on MTMC's plan for evaluating the: (1) pilot results; and (2) proposed industry alternative called the Commercial-Like Activities for Superior Quality (CLASS) proposal."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Defense Transportation: DOD and GSA Personal Property Programs (open access)

Defense Transportation: DOD and GSA Personal Property Programs

Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the General Services Administration (GSA) and the Department of Defense (DOD) personal property programs."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Veterans' Affairs: Progress and Challenges in Transforming Health Care (open access)

Veterans' Affairs: Progress and Challenges in Transforming Health Care

A statement of record issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the challenges facing the Department of Veterans Affairs (VA) in transforming health care, focusing on: (1) VA's transformation progress to date; (2) challenges that remain to be confronted; and (3) the implications for VA's fiscal year (FY) 2000 budget."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Federal Lobbying: Differences in Lobbying Definitions and Their Impact (open access)

Federal Lobbying: Differences in Lobbying Definitions and Their Impact

A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO reviewed the reporting of lobbying activities by organizations that have employees who lobby on the organizations' behalf and have the option to report their lobbying expenses under the Lobbying Disclosure Act (LDA) of 1995 or applicable Internal Revenue Code (IRC) provisions that they use for tax purposes, focusing on: (1) the differences between the LDA and IRC section 4911 and 162(e) definitions of lobbying; (2) the impact that differences in the definitions may have on registration and reporting under LDA, including information on the number of organizations using each definition and the expenses they have reported; and (3) identifying and analyzing options, including harmonizing the three definitions, that may better ensure that the public disclosure purposes of LDA are realized."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Medicare: Early Evidence of Compliance Program Effectiveness Is Inconclusive (open access)

Medicare: Early Evidence of Compliance Program Effectiveness Is Inconclusive

A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO reviewed the compliance programs established by health care providers to reduce improper payments by Medicare, focusing on the: (1) prevalence of compliance programs among hospitals and other Medicare providers; (2) costs involved with compliance programs; and (3) effectiveness of the programs, to the extent that could be measured."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Military Banking: Solicitations, Fees, and Revenue Potential (open access)

Military Banking: Solicitations, Fees, and Revenue Potential

A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO provided information on the Department of Defense's (DOD) domestic banking program on military bases, focusing on whether: (1) domestic military bases have followed DOD procedures to provide for open solicitations in obtaining banking services; (2) on-base financial institutions face competition for banking services from other financial institutions and charge fees competitive with other banks; and (3) opportunities exist for DOD and military bases to generate additional revenues from banking services on military bases and how this might affect banking services and customers."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
IRS Management: Business and Systems Modernization Pose Challenges (open access)

IRS Management: Business and Systems Modernization Pose Challenges

Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the management challenges facing the Internal Revenue Service (IRS) and its progress in implementing its new restructuring initiative."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Paperwork Reduction Act: Burden Increases and Unauthorized Information Collections (open access)

Paperwork Reduction Act: Burden Increases and Unauthorized Information Collections

Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the implementation of the Paperwork Reduction Act (PRA)."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Year 2000 Computing Crisis: Action Needed to Ensure Continued Delivery of Veterans Benefits and Health Care Services (open access)

Year 2000 Computing Crisis: Action Needed to Ensure Continued Delivery of Veterans Benefits and Health Care Services

Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the Department of Veterans Affairs (VA) year 2000 readiness, focusing on: (1) VA's ability to deliver benefits and health care services through the turn of the century; and (2) the readiness of automated systems that support such delivery, the compliance status of biomedical equipment used in patient care, and the year 2000 readiness of the pharmaceutical and medical-surgical manufacturers upon which VA relies."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Information Security: The Melissa Computer Virus Demonstrates Urgent Need for Stronger Protection Over Systems and Sensitive Data (open access)

Information Security: The Melissa Computer Virus Demonstrates Urgent Need for Stronger Protection Over Systems and Sensitive Data

Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed: (1) the immediate effects of the Melissa virus and variations of it as well as its broader implications for the federal government; and (2) critical measures that should be taken to ensure that federal departments and agencies are better prepared for future viruses and other forms of attack."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
United Nations: Progress of Procurement Reforms (open access)

United Nations: Progress of Procurement Reforms

A chapter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the United Nations Secretariat's efforts to reform its procurement process, focusing on: (1) the types of procurement problems that the U.N. High Level Expert Group on Procurement and U.N. audit and inspection organizations found; (2) progress on the implementation of the Expert Group's recommendations and other reforms to correct procurement-related problems; and (3) whether these actions have succeeded in achieving the objectives of procurement reform."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Evaluation of gas-reburning and low NO sub x burners on a wall fired boiler (open access)

Evaluation of gas-reburning and low NO sub x burners on a wall fired boiler

The primary objective of this CCT project is to evaluate the use of Gas Reburning and Low NO{sub x} Burners (GR-LNB) for NO{sub x} emission control from a wall fired boiler. It is anticipated that, if the demonstration is successful, the GR-LNB technology could become commercialized during the 1990's and will be capable of (1) achieving significant reduction in the emissions of nitrogen oxides and sulfur dioxide (another acid rain precursor) from existing facilities to minimize environmental impacts such as transboundary and interstate pollution and/or (2) providing for future energy needs in an environmentally acceptable manner. Low NO{sub x} burners are designed to delay the mixing of the coal fuel with combustion air to minimize the NO{sub x} formation. Typically, one may obtain up to 50% reduction in NO{sub x} emissions through the use of LNB. For LNB applications, the technology is developed and a number of LNB designs are commercially available.
Date: April 15, 1992
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Enhancing the use of coals by gas reburning-sorbent injection (open access)

Enhancing the use of coals by gas reburning-sorbent injection

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}), on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. Work on a third unit, wall fired, has been stopped because of funding limitations. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI).
Date: April 15, 1992
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Hydra 70 Rocket: Recent Performance Has Improved (open access)

Hydra 70 Rocket: Recent Performance Has Improved

Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the Hydra 70 rocket, focusing on the: (1) problem of early motor blow (EMB); (2) actions the military services have taken to identify and eliminate its causes; and (3) rocket's present performance."
Date: April 15, 1999
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Numerical experiments on the probability of seepage intounderground openings in heterogeneous fractured rock (open access)

Numerical experiments on the probability of seepage intounderground openings in heterogeneous fractured rock

An important issue for the performance of underground nuclear waste repositories is the rate of seepage into the waste emplacement drifts. A prediction of this rate is particularly complicated for the potential repository site at Yucca Mountain, Nevada, because it is located in thick, unsaturated, fractured tuff formations. Underground opening in unsaturated media might act as capillary barriers, diverting water around them. In the present work, they study the potential rate of seepage into drifts as a function of the percolation flux at Yucca Mountain, based on a stochastic model of the fractured rock mass in the drift vicinity. A variety of flow scenarios are considered, assuming present-day and possible future climate conditions. They show that the heterogeneity in the flow domain is a key factor controlling seepage rates, since it causes channelized flow and local ponding in the unsaturated flow field.
Date: April 15, 1998
Creator: Birkholzer, J.; Li, G.; Tsang, C. F. & Tsang, Y.
Object Type: Report
System: The UNT Digital Library
Identification and initial assessment of candidate BWR late-phase in-vessel accident management strategies (open access)

Identification and initial assessment of candidate BWR late-phase in-vessel accident management strategies

Work sponsored by the United States Nuclear Regulatory Commission (USNRC) to identify and perform preliminary assessments of candidate BWR (boiling water reactor) in-vessel accident management strategies was completed at Oak Ridge National Laboratory (ORNL) during fiscal year 1990. Mitigative strategies for containment events have been the subject of a companion study at Brookhaven National Laboratory. The focus of this Oak Ridge effort was the development of new strategies for mitigation of the late phase events, that is, the events that would occur in-vessel after the onset of significant core damage. The work began with an investigation of the current status of BWR in-vessel accident management procedures and proceeded through a preliminary evaluation of several candidate new strategies. The steps leading to the identification of the candidate strategies are described. The four new candidate late-phase (in-vessel) accident mitigation strategies identified by this study and discussed in the report are: (1) keep the reactor vessel depressurized; (2) restore injection in a controlled manner; (3) inject boron if control blade damage has occurred; and (4) containment flooding to maintain core and structural debris in-vessel. Additional assessments of these strategies are proposed.
Date: April 15, 1991
Creator: Hodge, S.A.
Object Type: Article
System: The UNT Digital Library
Emittance measurement in a magnetic field (open access)

Emittance measurement in a magnetic field

Emittance can be measured by intercepting an electron beam on a range thick plate and then observing the expansion of beamlets transmitted through small holes. The hole size is selected to minimize space charge effects. In the presence of a magnetic field the beamlets have a spiral trajectory and the usual field free formulation must be modified. To interpret emittance in the presence of a magnetic field an envelope equation is derived in the appropriate rotating frame. 1 ref.
Date: April 15, 1991
Creator: Boyd, J.K.
Object Type: Article
System: The UNT Digital Library
Simulations of NOVA direct-drive hydrodynamics experiments (open access)

Simulations of NOVA direct-drive hydrodynamics experiments

Directly driven Rayleigh-Taylor instability growth experiments being performed on NOVA have been simulated using the computer code, LASNEX. Foils with single-wavelength imposed surface perturbations have been driven with a single beam of 0.53 {mu}m light, employing smoothing by spectral dispersion (SSD). In addition to simulating foils with imposed surface perturbations, we have simulated flat foils driven by beams with time-dependent intensity modulation resulting from the NOVA implementation of SSD. These simulations show the development of large amplitude modulation of the target from residual intensity nonuniformities. Structure seeded by beam nonuniformity would overwhelm modulation resulting from imposed surface perturbations of sub-micron initial amplitude, but is predicted to develop sufficiently slowly that we expect to observe growth of perturbations with initial amplitudes of several microns. In other NOVA experiments, flat foils with an embedded brominated spectroscopic tracer layer are used in infer mass ablation rates. SSD drive is predicted to yield ablation rates in better agreement with 1-D simulations than drive from a beam with random phase plates (RPP) alone. Simulations of foils driven with RPP beams show enhanced ablation rates because modulation of the ablation front increases its surface area. Line emission from the seed is first seen at cold spots …
Date: April 15, 1991
Creator: Weber, S. V, & Glendinning, S. G.
Object Type: Article
System: The UNT Digital Library
Physics issues in the design of a recirculating induction accelerator for heavy ion fusion (open access)

Physics issues in the design of a recirculating induction accelerator for heavy ion fusion

A substantial savings in size and cost over a linear machine may be achieved in an induction accelerator in which a heavy ion beam makes many (< {approximately} 50) passes through one or more circular induction accelerators. We examine how the requirement of high beam quality and the requirement of pulse simultaneity at the target constrain the design of such an accelerator. Some of the issues that we have considered include beam interactions with residual gas, beam-beam charge exchange, emittance growth around bends, and beam instabilities. We show some of the interplay between maximization of beam quality and recirculator efficiency, and the minimization of recirculator cost, in arriving at a recirculator design. 9 refs., 1 fig.
Date: April 15, 1991
Creator: Barnard, J. J.; Newton, M. A.; Reginato, L. L.; Sharp, W. M. & Yu, S. S.
Object Type: Article
System: The UNT Digital Library
Secondary oil recovery from selected Carter sandstone oilfields, Black Warrior Basin, Alabama (open access)

Secondary oil recovery from selected Carter sandstone oilfields, Black Warrior Basin, Alabama

The objectives of this secondary oil recovery project involving the Carter sandstone in northwest Alabama are: (1) To increase the ultimate economic recovery of oil from the Carter reservoirs, thereby increasing domestic reserves and lessening US dependence on foreign oil; (2) To extensively model, test, and monitor the reservoirs so their management is optimized; and (3) To assimilate and transfer the information and results gathered to other US oil companies to encourage them to attempt similar projects. Start-up water injection began on 0 1/12/93 at the Central Bluff Field, and daily operations began on 01/13/93. These operations include monitoring wellhead pressures at the injector and two producers, and injection water treatment. Water injection was running 200-300 bbl/day at the end of February. Once the unit is pressured-up well testing will be performed. Unitization was approved on 03/01/93.b. For the North Fairview Field correlations and log analyses were used to determine the fluid and rock properties. A summary of these properties is included in Table 1. The results of the log analysis were used to construct the hydrocarbon pore volume map shown on Figure 1. The map was planimetered to determine original oil-in-place (OOIP) values and the hydrocarbon pore volume by …
Date: April 15, 1993
Creator: Anderson, J.C.
Object Type: Report
System: The UNT Digital Library
Microwave sintering of nanophase ceramics without concomitant grain growth (open access)

Microwave sintering of nanophase ceramics without concomitant grain growth

A method of sintering nanocrystalline material is disclosed wherein the nanocrystalline material is microwaved to heat the material to a temperature less than about 70% of the melting point of the nanocrystalline material expressed in degrees K. This method produces sintered nanocrystalline material having a density greater than about 95% of theoretical and an average grain size not more than about 3 times the average grain size of the nanocrystalline material before sintering. Rutile TiO[sub 2] as well as various other ceramics have been prepared. Grain growth of as little as 1.67 times has resulted with densities of about 90% of theoretical.
Date: April 15, 1991
Creator: Eastman, J.A.; Sickafus, K.E. & Katz, J.D.
Object Type: Patent
System: The UNT Digital Library