UNT Libraries Government Documents Department - 147 Matching Results

Search Results

Agricultural Research, Education, and Extension Issues in the 105th Congress

Description: The public agricultural research, education, and extension system is comprised of a nationwide network of federal and state agricultural research laboratories and departments, land grant Colleges of Agriculture, colleges of forestry and veterinary medicine, and the nationwide Cooperative Extension System. Although the basic authority to conduct agricultural research and extension programs is permanent, Congress since 1977 has provided funding authority and policy guidance for USDA's in-house research programs, and for federal support for cooperative research, higher education, and extension programs in the states, through a title contained in omnibus farm legislation. This report discusses specific pieces of such legislation and details certain agricultural and food-related appropriations.
Date: January 15, 1998
Creator: Rawson, Jean M.

Application of Integrated Reservoir Management and Reservoir Characterization to Optimize Infill Drilling.

Description: A total of 18 wells, 14 producers and 4 injection wells, were drilled and completed during the Field Demonstration portion of the project. These 18 wells are all currently in service, with the producing wells going on-line between May and September 1996, and the injection wells going into service between August and December 1996. Current Unit production is approximately 3,100 BOPD, of which approximately 800 BOPD is being contributed from the 14 Project 10-acre producing wells (Figure 1). A revision in the Statement of Work was approved to allow for the drilling of additional 10-acre infill wells or injection well conversions as budget constraints allow.
Date: January 15, 1998

[Calibration methods for neutron diagnostics at Omega]. DOE/NLUF final report

Description: The investigation of Calibration Methods for Neutron Diagnostics at Omega is still underway. The data shown here is a compilation of measurements taken at Omega during the time of the grant. The data set has been updated with additional information taken this year. The neutron yield from an ICF event was determined by measuring the activity of an aluminum sample activated by target-produced DT neutrons. The radioactive nuclei {sup 24}Na and {sup 27}Mg, which were produced via the {sup 27}Al(n,{alpha}){sup 24}Na and {sup 27}Al(n,p){sup 27}Mg direct reactions, beta decay to excited states of {sup 24}Mg and {sup 27}Al respectively. These excited states then emitted gamma rays as the nuclei de-excite to their respective ground states. The gamma rays are detected and counted. From their numbers the neutron yield is determined.
Date: January 15, 1998
Creator: Padalino, S.

Development & Testing of Industrial Scale, Coal Fired Combustion System, Phase 3

Description: In the third quarter of calendar year 1997, 10 days of tests on the 20 MMBtu/hr combustor-boiler facility were performed. The total test days on the Philadelphia facility to the end of September 1997 was 93, of which 19 tests were implemented as part of another DOE project. This exceeds the planned 63 test days for this project. Key project objectives have been exceeded, including NO emissions as low as 0.07 lb/MMBtu and SO emissions as low as 0.2 x 2 lb/MMBtu. The tests in the present quarter focussed on further optimizing post-combustion sorbent injection for SO2 and NOx control processes. The results were in the same range as in previous tests. In addition, initial tests of Coal Tech�s post-combustion NOx control process were implemented on a 100 MW and a 37 MW utility boiler, and NOx reductions as high as 40% were measured in the latter boiler.
Date: January 15, 1998
Creator: Zauderer, Bert

Dual Axis Radiographic Hydrodynamic Test Facility mitigation action plan. Annual report for 1997

Description: This Mitigation Action Plan Annual Report (MAPAR) has been prepared by the US Department of Energy (DOE) as part of implementing the Dual Axis Radiographic Hydrodynamic Test Facility (DARHT) Mitigation Action Plan (MAP). This MAPAR provides a status on specific DARHT facility design- and construction-related mitigation actions that have been initiated in order to fulfill DOE`s commitments under the DARHT MAP. The functions of the DARHT MAP are to (1) document potentially adverse environmental impacts of the Phased Containment Option delineated in the Final EIS, (2) identify commitments made in the Final EIS and ROD to mitigate those potential impacts, and (3) establish Action Plans to carry out each commitment (DOE 1996). The DARHT MAP is divided into eight sections. Sections 1--5 provide background information regarding the NEPA review of the DARHT project and an introduction to the associated MAP. Section 6 references the Mitigation Action Summary Table which summaries the potential impacts and mitigation measures; indicates whether the mitigation is design-, construction-, or operational-related; the organization responsible for the mitigation measure; and the projected or actual completion data for each mitigation measure. Sections 7 and 8 discuss the Mitigation Action Plan Annual Report and Tracking System commitment and the Potential Impacts, Commitments, and Action Plans respectively. Under Section 8, potential impacts are categorized into five areas of concern: General Environment, including impacts to air and water; Soils, especially impacts affecting soil loss and contamination; Biotic Resources, especially impacts affecting threatened and endangered species; Cultural/Paleontological Resources, especially impacts affecting the archeological site known as Nake`muu; and Human Health and Safety, especially impacts pertaining to noise and radiation. Each potential impact includes a brief statement of the nature of the impact and its cause(s). The commitment made to mitigate the potential impact is identified and the Action Plan for each commitment ...
Date: January 15, 1998
Creator: Haagenstad, H.T.

Energy and waste reduction in the wood fiber and fuel industry utilizing a long wave length catalytic infrared drying system. Progress report Number 3

Description: Following the testing of the Cat-Tec handling system, detail design work commenced both at the Catalytic Industrial Systems (CIS) Kansas facility and at the Cat-Tec offices in Minneapolis for the mating of the heating and handling system elements of the catalytic infrared particulate dryer. A used equipment looped handling system designed to feed and recirculate the test material was procured and shipped to CIS in anticipation of the on-site testing. Evaluation of the findings of the test results led the joint CIS-Cat-Tec design team to conclude that the unit to be provided to Lignetics for testing needed to have approximately 120 square feet of agitation bed and approximately 100 feet of infrared generation surfaces. The overall size was thus increased approximately 50% from the initial test unit.
Date: January 15, 1998
Creator: Davis, R.

Environmental-performance research priorities: Wood products. Final report

Description: This report describes a research plan to establish environmental, energy, and economic performance measures for renewable building materials, and to identify management and technology alternatives to improve environmental performance in a cost-effective manner. The research plan is designed to: (1) collect environmental and economic data on all life-cycle stages of the materials, (2) ensure that the data follows consistent definitions and collection procedures, and (3) develop analytical procedures for life-cycle analysis to address environmental performance questions. The research will be subdivided into a number of individual project modules. The five processing stages of wood used to organize the research plan are: (1) resource management and harvesting; (2) processing; (3) design and construction of structures; (4) use, maintenance, and disposal; and (5) waste recycling. Individual research module descriptions are provided in the report, as well as assessment techniques, research standards and protocol, and research management. 13 refs., 5 figs., 3 tabs.
Date: January 15, 1998

Enzyme catalysts for a biotechnology-based chemical industry. Quarterly progress report, September 29--December 28, 1997

Description: The goal of this research is to engineer enzymes to be efficient and economically attractive catalysts for the chemical industry. The author is attempting to demonstrate generally-applicable approaches to enzyme improvement as well as develop specific catalysts for potential industrial application. In this report attention is focused on random mutagenesis of pNB esterase -- improved activity and stability. The most thermostable esterases obtained by sequential random mutagenesis (6H7) and random mutagenesis plus recombination (6sF9) each contain 9 amino acid mutations and a number of silent mutations, relative to the wild-type sequence. Eight of the mutations are present in both genes, for a total of ten potentially adaptive mutations. Because several of these mutations occurred in the same generation, it is difficult to identify the mutations responsible for the increases in activity and stability. In order to aid in this identification, the thermostable genes were recombined with the wild-type gene, in hopes of removing neutral mutations. The gene from the first-generation variant, with five amino acid substitutions was also recombined with wild-type.
Date: January 15, 1998
Creator: Arnold, F.H.

Evaluation of Reservoir Wettability and its Effect on Oil Recovery.

Description: We report on the first year of the project, `Evaluation of Reservoir Wettability and its Effect on Oil Recovery.` The objectives of this five-year project are (1) to achieve improved understanding of the surface and interfacial properties of crude oils and their interactions with mineral surfaces, (2) to apply the results of surface studies to improve predictions of oil production from laboratory measurements, and (3) to use the results of this research to recommend ways to improve oil recovery by waterflooding. During the first year of this project we have focused on understanding the interactions between crude oils and mineral surfaces that establish wetting in porous media. As background, mixed-wetting and our current understanding of the influence of stable and unstable brine films are reviewed. The components that are likely to adsorb and alter wetting are divided into two groups: those containing polar heteroatoms, especially organic acids and bases; and the asphaltenes, large molecules that aggregate in solution and precipitate upon addition of n-pentane and similar agents. Finally, the test procedures used to assess the extent of wetting alteration-tests of adhesion and adsorption on smooth surfaces and spontaneous imbibition into porous media are introduced. In Part 1, we report on studies aimed at characterizing both the acid/base and asphaltene components. Standard acid and base number procedures were modified and 22 crude oil samples were tested. Our approach to characterizing the asphaltenes is to focus on their solvent environment. We quantify solvent properties by refractive index measurements and report the onset of asphaltene precipitation at ambient conditions for nine oil samples. Four distinct categories of interaction mechanisms have been identified that can be demonstrated to occur when crude oils contact solid surfaces: polar interactions can occur on dry surfaces, surface precipitation is important if the oil is a poor solvent for ...
Date: January 15, 1998
Creator: Buckley, J.S.

Feasibility analysis report for hybrid non-thermal plasma reactors

Description: The purpose of the Strategic Environmental Research and Development Program (SERDP) project CP-1038 is to evaluate and develop non-thermal plasma (NTP) reactor technology for Department of Defense (DoD) air emissions control applications. The primary focus is on oxides of nitrogen (NO{sub x}) and a secondary focus on hazardous air pollutants (HAPs), especially volatile organic compounds (VOCs). Examples of NO{sub x} sources are jet engine test cells (JETCs) and diesel-engine powered electrical generators. Examples of VOCs are organic solvents used in painting, paint-stripping, and parts cleaning. Because pollutant-containing air-emission streams within the Department of Defense (DoD) frequently span a broad range of pollutant concentrations, flow rates, and gas conditions (e.g., temperature, humidity), a single type of NTP reactor is not expected to fit all types of emissions streams. Additionally, stand-alone NTP reactors may provide neither an adequate means of pollutant removal nor an acceptable economic solution. Therefore, hybrid systems (combinations of different NTP reactor types or architectures), which employ adsorbents and/or catalytic media are being examined by researchers in this field. This report is intended to provide a preliminary summary analysis of a few representative hybrid systems as a means of introducing the hybrid or staged-system concept.
Date: January 15, 1998
Creator: Rosocha, L.A.

Investigation of properties and performance of ceramic composite components: Final report on Phases 3 and 4

Description: The objective of the Fossil Energy Advanced Research and Technology Development (AR and TD) Materials Program is to conduct research and development on materials for longer-term fossil energy applications as well as for generic needs of various fossil fuel technologies. The research program of the Materials Response Group at Virginia Tech addresses the need for reliable and durable structural ceramic composites to perform in high temperature environments. The research effort provides an experimental and analytical basis for the transition from properties of materials to performance of actual component structures. Phases 1 and 2 of the present program focused on the development of test capabilities, initial studies of component mechanical response under various conditions and the development of a life prediction methodology. These efforts have been described in previous reports. This report summarizes the major tasks completed under Phases 3 and 4 of the project. Overall, the authors have made significant progress in a broad spectrum of tasks in this program. Their efforts have encompassed component evaluation, assessment of new SiC-based composites with improved high-temperature potential, development of oxide coating materials for SiC, and the extension and development of new models for predicting the durability of composite components under specific operating conditions for various CMC applications. Each of these areas of work is an important area for achieving the ultimate goal of usable SiC-based composites in high-temperature corrosive environments typical of fossil energy applications.
Date: January 15, 1998
Creator: Curtin, W.A.; Halverson, H.; Carter, R.H.; Miraj, N. & Reifsnider, K.L.

Southeast geysers effluent pipeline project. Final report

Description: The project concept originated in 1990 with the convergence of two problems: (1) a need for augmented injection to mitigate declining reservoir productivity at the Geysers; and (2) a need for a new method of wastewater disposal for Lake County communities near the The Geysers. A public/private partnership of Geysers operators and the Lake County Sanitation District (LACOSAN) was formed in 1991 to conduct a series of engineering, environmental, and financing studies of transporting treated wastewater effluent from the communities to the southeast portion of The Geysers via a 29-mile pipeline. By 1994, these evaluations concluded that the concept was feasible and the stakeholders proceeded to formally develop the project, including pipeline and associated facilities design; preparation of an environmental impact statement; negotiation of construction and operating agreements; and assembly of $45 million in construction funding from the stakeholders, and from state and federal agencies with related program goals. The project development process culminated in the system`s dedication on October 16, 1997. As of this writing, all project components have been constructed or installed, successfully tested in compliance with design specifications, and are operating satisfactorily.
Date: January 15, 1998
Creator: Dellinger, M.

String duality and novel theories without gravity

Description: We describe some of the novel 6d quantum field theories which have been discovered in studies of string duality. The role these theories (and their 4d descendants) may play in alleviating the vacuum degeneracy problem in string theory is reviewed. The DLCQ of these field theories is presented as one concrete way of formulating them, independent of string theory.
Date: January 15, 1998
Creator: Kachru, Shamit

The Fermilab computing farms in 1997

Description: The farms in 1997 went through a variety of changes. First, the farms expansion, begun in 1996, was completed. This boosted the computing capacity to something like 20,000 MIPS (where a MIP is a unit defined by running a program, TINY, on the machine and comparing the machine performance to a VAX 11/780). In SpecInt92, it would probably rate close to 40,000. The use of the farms was not all that large. The fixed target experiments were not generally in full production in 1997, but spent time tuning up code. Other users processed on the farms, but tended to come and go and not saturate the resource. Some of the old farms were retired, saving the lab money on maintenance and saving the farms support staff effort.
Date: February 15, 1998
Creator: Wolbers, S.

Laser sampling system for an inductively-coupled atomic emission spectrometer. Final report

Description: A laser sampling system was attached to a Perkin Elmer Optima 3000 inductively-coupled plasma, atomic emission spectrometer that was already installed and operating in the Chemistry and Geochemistry Department at the Colorado School of Mines. The use of the spectrometer has been highly successful. Graduate students and faculty from at least four different departments across the CSM campus have used the instrument. The final report to NSF is appended to this final report. Appendices are included which summarize several projects utilizing this instrument: acquisition of an inductively-coupled plasma atomic emission spectrometer for the geochemistry program; hydrogen damage susceptibility assessment for high strength steel weldments through advanced hydrogen content analysis, 1996 and 1997 annual reports; and methods for determination of hydrogen distribution in high strength steel welds.
Date: February 15, 1998

Pyrite oxidation in saturated and Unsaturated Porous Media Flow: AComparison of alternative mathematical modeling approaches

Description: Pyrite (FeS{sub 2}) is one of the most common naturally occurring minerals that is present in many subsurface environments. It plays an important role in the genesis of enriched ore deposits through weathering reactions, is the most abundant sulfide mineral in many mine tailings, and is the primary source of acid drainage from mines and waste rock piles. The pyrite oxidation reaction serves as a prototype for oxidative weathering processes with broad significance for geoscientific, engineering, and environmental applications. Mathematical modeling of these processes is extremely challenging because aqueous concentrations of key species vary over an enormous range, oxygen inventory and supply are typically small in comparison to pyrite inventory, and chemical reactions are complex, involving kinetic control and microbial catalysis. We present the mathematical formulation of a general multi-phase advective-diffusive reactive transport model for redox processes. Two alternative implementations were made in the TOUGHREACT and TOUGH2-CHEM simulation codes which use sequential iteration and simultaneous solution, respectively. The simulators are applied to reactive consumption of pyrite in (1) saturated flow of oxidizing water, and (2) saturated-unsaturated flow in which oxygen transport occurs in both aqueous and gas phases. Geochemical evolutions predicted from different process models are compared, and issues of numerical accuracy and efficiency are discussed.
Date: February 15, 1998
Creator: Xu, Tianfu; White, Stephen P. & Pruess, Karsten

Recent results from CDF

Description: We first present recent CDF results on the top quark, covering the measurement of the t{anti t} production cross section and the top quark mass, the observation of hadronic W decays in top events, the measurement of V{sub tb}, the search for flavor changing neutral current decays, and kinematical properties of t{anti t} production. Then we present one topic from CDF exotic physics results, i.e., the search for first-generation leptoquarks, and one topic from CDF B physics results, i.e., the measurement of time-dependent B{sup 0}-{anti B}{sup 0} mixing. Finally we conclude by briefly mentioning the prospects for Run II.
Date: February 15, 1998
Creator: Takikawa, K. & CDF

Electron-atom collision studies using optically state-selected beams. Final report, May 15, 1991--May 14, 1994

Description: As stated in the original proposal, the goal of the project has been to perform electron-scattering experiments on a few model systems with emphasis on resolving all the quantum-state variables possible. The purpose of these experimental studies has been to provide a set of measurements of unprecedented accuracy and completeness that can be used as benchmarks for comparison with theoretical calculations. During the period covered by this report, the work has concentrated on measuring low-energy electron scattering from sodium and chromium. Sodium provides an ideal one-electron test case, since it has a single loosely bound valence electron, making it approachable by even the most complex electron scattering calculations. In addition, the atom has a strong optical transition from the 3{sup 2}S{sub 1/2} ground state to the 3{sup 2}P{sub 3/2} excited state whose wavelength (589 nm) matches the peak output of the laser dye rhodamine 6G. Thus optical pumping techniques can be readily applied in the laboratory, leading to either a population of ground state atoms in which the spin of the valence electron is oriented either up or down in the laboratory, or a spin polarized pure angular momentum state of the excited 3{sup 2}P{sub 3/2} state. Such an excited state makes possible superelastic scattering, where the internal energy of the atom is transferred to the electron during the collision. This turns out to be a very efficient way to study the inelastic scattering process. Unlike sodium, chromium provides an extremely exacting test for theoretical methods because of its very complex electronic structure, not because it is simple. With a valence configuration consisting of five electrons in a half-filled 3d shell, plus another electron in a 4s shell, this atom provides a test case that can challenge even the simplest approximations.
Date: March 15, 1998
Creator: Kelley, M.H. & McClelland, J.J.

Concentration of uranium and plutonium in unsaturated spent fuel tests.

Description: Commercial spent fuel is being tested under oxidizing conditions at 90 C in drip tests with simulated groundwater to evaluate its long-term performance in a potential repository at Yucca Mountain [1-4]. The tests allow us to monitor the dissolution behavior of the spent fuel matrix and the release rates of individual radionuclides. This paper reports the U and Pu concentrations in the leachates of drip tests during 3.7 years of reaction. Changes in these concentrations are correlated with changes in the measured pH and the appearance of alteration products on the fuel surface. Although there is little thermodynamic information at 90 C for either uranyl or plutonium compounds, some data are available at 25 C [5-8]. The literature data for the U and Pu solubilities of U and Pu compounds were compared to the U and Pu concentrations in the leachates. We also compare Wilson's [9] U and Pu concentrations in semi-static tests at 85 C on spent fuel with our results.
Date: April 15, 1998
Creator: Finn, P. A.

Design review report: 200 East upgrades for Project W-314, tank farm restoration and safe operations

Description: This Design Review Report (DRR) documents the contractor design verification methodology and records associated with project W-314`s 200 East (200E) Upgrades design package. The DRR includes the documented comments and their respective dispositions for this design. Acceptance of the comment dispositions and closure of the review comments is indicated by the signatures of the participating reviewers. Project W-314 is a project within the Tank Waste Remediation System (TWRS) Tank Waste Retrieval Program. This project provides capital upgrades for the existing Hanford tank farm waste transfer, instrumentation, ventilation, and electrical infrastructure systems. To support established TWRS programmatic objectives, the project is organized into two distinct phases. The initial focus of the project (i.e., Phase 1) is on waste transfer system upgrades needed to support the TWRS Privatization waste feed delivery system. Phase 2 of the project will provide upgrades to support resolution of regulatory compliance issues, improve tank infrastructure reliability, and reduce overall plant operating/maintenance costs. Within Phase 1 of the W-314 project, the waste transfer system upgrades are further broken down into six major packages which align with the project`s work breakdown structure. Each of these six sub-elements includes the design, procurement, and construction activities necessary to accomplish the specific tank farm upgrades contained within the package. The first design package (AN Valve Pit Upgrades) was completed in November 1997, and the associated design verification activities are documented in HNF-1893. The second design package, 200 East (200E) Upgrades, was completed in March 1998. This design package identifies modifications to existing valve pits 241-AX-B and 241-A-B, as well as several new waste transfer pipelines to be constructed within the A Farm Complex of the 200E Area. The scope of the valve pit modifications includes new pit cover blocks, valve manifolds, leak detectors, and special protective coatings similar to those previously approved ...
Date: April 15, 1998
Creator: Boes, K.A.

Energy and waste reduction in the wood fiber and fuel industry utilizing a long wave length catalytic infrared drying system. Progress report No.4, January 1--March 31, 1998

Description: During the past quarter significant headway was made on the project. The design and fabrication of the materials handling system by the subcontractor, Cat-Tech Industries, was completed in late January and was shipped in February to Catalytic Industrial System (CIS) Kansas facility. Unfortunately a part shipped directly from the manufacturer, for mating in Kansas to the unit, was determined to be the wrong size and nearly a month was lost in the process of ordering and receiving the correct parts. In early March the system was ready for agitation testing and performed perfectly. Design of the air circulation system was completed in late March and fabrication and installation of that element is expected to be completed this week (April 15--22). The insulation panels have been designed and ordered and are expected to be on site and ready for installation the last week of April. In a series of conference phone calls, it was decided to increase the amount of infrared energy input in Zone 1 (the first one-third of the 30 foot unit) of the dryer. These zones are presently being redesigned and fabricated and will likely be installed by the 10th of May. Product testing is expected to commence around the 15--20 of May. Work on the testing protocol was held in check while the discussion on increasing the total energy input was transpiring. It is scheduled to restart on or about May 1.
Date: April 15, 1998
Creator: Davis, R.

Final Technical Report: Ocean CO{sub 2} Measurements for the WOCE Hydrographic Survey in the Pacific Ocean, 1992-1995 Field Years: Shore Based Analysis of Dissolved Inorganic Carbon January 1, 1993-April 15, 1998

Description: Participation in the hydrographic survey of the world ocean circulation experiment (WOCE) began in December 1990 with a two year grant from DOE for shore related analyses of inorganic carbon in sea water. These analyses were intended to assure that the measurements carried out under difficult laboratory conditions on board ships were consistent with measurements made under more carefully controlled shore laboratory conditions.
Date: April 15, 1998
Creator: Keeling, Charles D.

Fly ash-enhanced aluminum composites for automotive parts. [Reports for October to December, 1997, and January to March, 1998]

Description: The objectives of this report are to produce and evaluate the use of aluminum ''ashalloys''--metal matrix composites that incorporate coal fly ash--in the commercial manufacture of cast automotive parts. Some highlights of this report are: Results of the team coordination meeting in October included--(1) Determination of casting techniques from the candidates of squeeze, high pressure, low pressure, sand casting, and gravity pour; (2) Selection of the low stress/high stress automotive parts from the candidates of brake rotors, intake manifolds, and engine mounts; (3) Integration of the tasks essential for evaluating the fly ash characteristics and appropriate percentages of cenospheres or precipitator in the parts. Fly ash from two plants of Wisconsin Electric Power Company (WEPCo) was dispatched to the laboratories of JTM and UW-M for screening, characterization, and beneficiation. The fly ash was classified into different size fractions and is being analyzed for chemical composition and microstructure. Currently, fly ash beneficiation is removing the carbon, magnetic fractions, and sulfur. After classification and screening, JTM will deliver the processed fly ash to UW-M. Foundries are providing UW-M with information on the specific alloys needed for parts. Thompson Aluminum sent the base alloy 356 to UW-M where, in turn, small size ingots were prepared with fly ash from WEPCo. UW-M will continue process development and preparation of specific MMC ingots for foundries' parts production. Many of the program tasks are iterative over quarters, but findings considered milestones were: Collection and processing of fly ash; and Predictions on microstructure and alloy composites including type, size, and amount of fly ash for component property requirements.
Date: April 15, 1998
Creator: Golden, Dean & Rohatgi, Pradeep