UNT Libraries Government Documents Department - 9,073 Matching Results

Search Results

AISI/DOE Advanced Process Control Program Vol. 3 of 6 Microstructure Engineering in Hot Strip Mills, Part 1 of 2: Integrated Mathematical Model

Description: This report describes the work of developing an integrated model used to predict the thermal history, deformation, roll forces, microstructural evolution and mechanical properties of steel strip in a hot-strip mill. This achievement results from a joint research effort that is part of the American Iron and Steel Institute's (AIS) Advanced Process Control Program, a collaboration between the U.S. DOE and fifteen North American Steelmakers.
Date: July 31, 1999
Creator: Brimacombe, J. K.; Samarasekera, I. V.; Hawbolt, E. B.; Meadowcroft, T. R.; Militzer, M.; Pool, W. J. et al.

Final Report: Catalytic Hydrocarbon Reactions over Supported Metal Oxides, August 1, 1995 - July 31, 1999

Description: The research program focused on the catalysis of hydrodesulfurization (HDS) over molybdenum-based catalysts and how catalyst composition, redox ability, structure and neighboring sites control the catalytic properties of metal oxides. We sought to understand the catalytic features/sites that control hydrogenation, hydrogenolysis, and isomerization during HDS. Unprompted silica-supported molybdenum oxides and molybdenum sulfides were studied. Model catalyst systems were prepared from organometallic precursors or cluster compounds to generate supported structures that feature Mo(II) and Mo(IV) cations that are isolated or in ensembles and that have either Mo-O or Mo-S bonds. Conventional MOS{sub 2} catalysts, which contain both edge and rim sites, were be studied. Finally, single-layer MOS{sub 2} structures were also prepared from 2H-MoS{sub 2} powder so that the model systems could be compared against a disulfide catalyst that only involves rim sites. Catalytic reactions for thiophene and tetrahydrothione were studied over the various catalysts. Oxidation states were determined using X-ray photoelectron spectroscopy. X-ray crystallography was used to characterize and follow changes in the MOS{sub 2} structures. The program on metal oxides prepared supported oxides that have a specific structure and oxidation state to serve as model templates for the more complex commercial catalysts and then employed these structures in reaction studies. This focus area examined the relationships between structure and cation redox characteristics in oxidation catalysis. Infrared and Raman spectroscopy were used to characterize the cations and reaction intermediates.
Date: July 31, 1999
Creator: Ekerdt, John G.

Final Report: Travel Support Electromagnetic Induction Workshop, August 1, 1998 - July 31, 1999

Description: During the tenure of this grant we focused our efforts on the treatment of (i) the behavior of the negative hydrogen ion, H{sup {minus}}, in a strong laser field (whose intensity extends well into the nonperturbative regime), and (ii) two-electron escape from a helium atom, He, by synchrotrons light. The calculations for H{sup {minus}} were done using perimetric coordinates u, v, and w, which are linear combinations of the three interparticle distances, together with the three Euler angles. The algebra involved in the implementation of the perimetric coordinate system can be quite formidable. However, we formulated [1] a general and tractable decomposition of the two-electron wavefunction which greatly facilitated the algebra. A complex Sturmian-type basis set, in these coordinates, was employed. One of the main advantages of the perimetric coordinates is that the matrices representing the system's Hamiltonian and its interaction with the radiation field are sparse, so that storage requirements and the number of operations are minimized. The correlation between the electrons is fully incorporated. Indeed, perimetric coordinates are ideally suited to situations where the correlation is strong; each of the planes u = 0, v = 0, ancl w = 0 has the special significance that the electrons lie on a line passing through the nucleus--on the same side, of the nucleus if u or v is zero, and on opposite sides if w = 0. We found [2] that the two-electron probability distribution for H{sup {minus}} has maxima on each of these planes.
Date: July 31, 1999
Creator: Booker, John

HEMISPHERIC CENTER FOR ENVIRONMENTAL TECHNOLOGY

Description: FIU-HCET personnel visited the Special Technologies Laboratory (STL) for discussions with the Principal Investigator (PI) of Laser Induced Fluorescence Imaging (LIFI) and for training in LIFI. Mr. Peter Gibbons, Tanks Retrieval Technology Integration Manager, visited FIU-HCET on July 20, 1999. Mr. Gibbons inspected the pipeline unplugging experimental facility at the HCET testing field. The detailed test bed construction, testing plan, and plugging material specifications were discussed.
Date: July 31, 1999
Creator: Ebadian, M.A.

Ligand Intermediates in Metal-Catalyzed Reactions

Description: The longest-running goal of this project has been the synthesis, isolation, and physical chemical characterization of homogeneous transition metal complexes containing ligand types believed to be intermediates in the metal-catalyzed conversion of CO/H{sub 2}, CO{sub 2}, CH{sub 4}, and similar raw materials to organic fuels, feedstocks, etc. In the current project period, complexes that contain unusual new types of C{sub x}(carbide) and C{sub x}O{sub y} (carbon oxide) ligands have been emphasized. A new program in homogeneous fluorous phase catalysis has been launched as described in the final report.
Date: July 31, 1999
Creator: Gladysz, John A.

PRELIMINARY EVALUATION OF POTENTIAL OCCUPATIONAL AND PUBLIC HEALTH IMPACTS OF SEDIMENT DECONTAMINATION FACILITIES FOR NEW YORK/NEW JERSEY HARBOR

Description: Sediment is accumulating in New York/New Jersey Harbor, and shipping channels are rapidly becoming too shallow for large ships. The Port Authority of New York/New Jersey has determined that dredging of the ship channels is essential to keep them navigable. About five million cubic yards of sediment must be removed per year to keep the channels open. Without dredging, the channels will soon become unusable, and the shoreside shipping and warehousing businesses that depend on them will fade away. The economic loss to the area would be devastating. But the deeper layers of sediment in the Harbor contain a broad range of pollutants that are hazardous to humans and the environment-a legacy of past discharges that are no longer permitted. These include heavy metals, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), chlorinated pesticides, and dioxins. As a result, there are several million cubic yards of sediments to be dredged per year that do not meet applicable criteria for ocean disposal and must be dealt with in some other way. A possible solution to the problem is to treat the dredged material to immobilize or destroy the contaminants and make the treated sediments suitable for disposal in the ocean or on land at acceptable cost. A variety of technologies can be used to achieve this goal. The simplest approach is to make manufactured soil from untreated sediment. The most complex approaches involve high-temperature destruction of organic contaminants and immobilization of inorganic contaminants. When any of these technologies are used, there is potential for risks to human health from process wastes and from the treated materials themselves. Also, disposal or beneficial use of treated materials may generate other risks to human health or the environment. A description of some of the technologies considered is given in Table 1. Success in removing or ...
Date: July 31, 1999
Creator: ROWE,M.D.; KLEIN,R.C. & JONES,K.W.

Single-Iteration Learning Algorithm for Feed-Forward Neural Networks

Description: A new methodology for neural learning is presented, whereby only a single iteration is required to train a feed-forward network with near-optimal results. To this aim, a virtual input layer is added to the multi-layer architecture. The virtual input layer is connected to the nominal input layer by a specird nonlinear transfer function, and to the fwst hidden layer by regular (linear) synapses. A sequence of alternating direction singular vrdue decompositions is then used to determine precisely the inter-layer synaptic weights. This algorithm exploits the known separability of the linear (inter-layer propagation) and nonlinear (neuron activation) aspects of information &ansfer within a neural network.
Date: July 31, 1999
Creator: Barhen, J.; Cogswell, R. & Protopopescu, V.

Technology development for iron and cobalt Fischer-Tropsch catalysts

Description: The simple polymerization mechanism for the Fischer-Tropsch synthesis produces products which follows an Anderson-Schulz-Flory distribution. Thus, plotting the logarithm of the mole fraction versus carbon number will produce a straight line whose slope is related to alpha which is determined by the chain termination and propagation probabilities. In contrast, the products from laboratory and large commercial plants exhibit a two-alpha plot. Vapor-liquid calculations show that product accumulation cannot be responsible for the two-alpha plot when the alpha value is large enough to produce liquid products at the reaction temperature. Only in the case where alpha is small and all products are in the vapor phase, allowing evaporation of the startup solvent and a drying out of the reactor can a product accumulation produce a two-alpha plot. Results of filtration successes and failures from runs with the CSTR are described.
Date: July 31, 1999
Creator: Davis, B.H.

Adaptive forward-inverse modeling of reservoir fluids away from wellbores

Description: This Final Report contains the deliverables of the DeepLook Phase I project entitled, ''Adaptive Forward-Inverse Modeling of Reservoir Fluids Away from Wellbores''. The deliverables are: (i) a description of 2-D test problem results, analyses, and technical descriptions of the techniques used, (ii) a listing of program setup commands that construct and execute the codes for selected test problems (these commands are in mathematical terminology, which reinforces technical descriptions in the text), and (iii) an evaluation and recommendation regarding continuance of this project, including considerations of possible extensions to 3-D codes, additional technical scope, and budget for the out-years. The far-market objective in this project is to develop advanced technologies that can help locate and enhance the recovery of oil from heterogeneous rock formations. The specific technical objective in Phase I was to develop proof-of-concept of new forward and inverse (F-I) modeling techniques [Gelinas et al, 1998] that seek to enhance estimates (images) of formation permeability distributions and fluid motion away from wellbore volumes. This goes to the heart of improving industry's ability to jointly image reservoir permeability and flow predictions of trapped and recovered oil versus time. The estimation of formation permeability away from borehole measurements is an ''inverse'' problem. It is an inseparable part of modeling fluid flows throughout the reservoir in efforts to increase the efficiency of oil recovery at minimum cost. Classic issues of non-uniqueness, mathematical instability, noise effects, and inadequate numerical solution techniques have historically impeded progress in reservoir parameter estimations. Because information pertaining to fluid and rock properties is always sampled sparsely by wellbore measurements, a successful method for interpolating permeability and fluid data between the measurements must be: (i) physics-based, (ii) conditioned by signal-processing tenets, and (iii) solved with sufficiently rigorous mathematical and numerical techniques. Such a methodology is applied in this project, as ...
Date: July 30, 1999
Creator: Ziagos, J P; Gelinas, R J; Doss, S K & Nelson, R G

AISI/DOE Advanced Process Control Program Vol. 3 of 6: MICROSTRUCTURAL ENGINEERING IN HOT-STRIP MILLS Part 2 of 2: Constitutive Behavior Modeling of Steels Under Hot-Rolling Conditions

Description: This report describes the development of models for predicting (1) constitutive behaviors and (2) mechanical properties of hot-rolled steels as functions of chemical composition, microstructural features, and processing variables. The study includes the following eight steels: A36, DQSK, HSLA-V, HSLA-Nb, HSLA-50/Ti-Nb, and two interstitial-free (IF) grades. These developed models have been integrated into the Hot-Strip Mill Model (HSMM), which simulates the hot strip rolling mills and predicts the mechanical properties of hot-rolled products. The HSMM model has been developed by the University of British Columbia-Canada as a part of project on the microstructural engineering in hot-strip mills.
Date: July 30, 1999
Creator: Cheng, Yi-Wen & Purtscher, Patrick

Atmospheric Radiation Measurement Program facilities newsletter, July 1999.

Description: Summer research efforts continue in July with the SGP99 Hydrology Campaign headed by the US Department of Agriculture, Agricultural Research Service. Other participants are the National Aeronautics and Space Administration (NASA), the National Oceanic and Atmospheric Administration, and the ARM Program. This campaign focuses on measuring soil moisture by using satellite-based instruments and takes place July 7--22, 1999. Soil moisture is an important component of Earth's hydrologic cycle and climate, but the understanding of it and the ability to measure it accurately are limited. Scientists need to understand soil moisture better so that it can be incorporated correctly into general circulation models. As an important factor in growing crops, soil moisture dictates a farmer's success or failure. Too much soil moisture can drown out croplands and cause flooding, whereas too little can lead to drought conditions, robbing crops of their life-supporting water. Decisions about which crops to plant and other land use issues depend on the understanding of soil moisture patterns. Soil moisture can be measured in various ways. ARM employs several direct methods using soil moisture probes buried from 1 inch to 6.5 feet below the surface. One type of probe has two stainless steel screens separated by a piece of fiberglass. Electrical resistance, which is a function of soil moisture content, is measured between the screens. Another type of probe measures soil temperature and the increase in temperature after the soil is heated by small heating element. From this measurement, the volume of water in the soil can be calculated.
Date: July 30, 1999
Creator: Sisterson, D. L.

Aviation: Issues Associated With the Theft of Stock Used to Create Airline Tickets

Description: A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on issues associated with the theft of stock used to create airline tickets, focusing on: (1) the number and value of the airline ticket stock stolen annually; (2) financial implications associated with the use of stolen ticket stock; (3) issues that are potentially associated with the use of stolen ticket stock; and (4) technological interventions and other initiatives designed to detect the use of stolen ticket stock."
Date: July 30, 1999
Creator: United States. General Accounting Office.

Best Practices: Better Management of Technology Development Can Improve Weapon System Outcomes

Description: A chapter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO assessed how best practices offer improvements to the way the Department of Defense (DOD) incorporates new technology into weapon system programs, focusing on: (1) the impact of technology maturity on product outcomes; (2) best practices for managing new technologies and incorporating them into products; and (3) ways DOD can adapt these practices to get better outcomes on weapon system programs."
Date: July 30, 1999
Creator: United States. General Accounting Office.

BIOMASS REBURNING - MEDELING/ENGINEERING STUDIES

Description: This project is designed to develop engineering and modeling tools for a family of NO{sub x} control technologies utilizing biomass as a reburning fuel. During the seventh reporting period (April 1--June 30, 1999), no information was received at EER on scheduled FETC R&D group's project activities. EER activities were on hold due to the pending purchase of the Niagara Mohawk's Dunkirk Station, a target demonstration site in this program, and then by the actual purchase of the Station by NRG. This report includes information about the current project status, recently submitted to NRG for soliciting their interest to proceed with biomass reburn demonstration, and notes on alternative demonstrative partners.
Date: July 30, 1999
Creator: Zamansky, Vladimir & Booth, Michael

Calculation of drift seepage for alternative emplacementdesigns

Description: The calculations presented in this report are performed to obtain seepage rates into drift and boreholes for two alternative designs of drift and waste emplacement at Yucca Mountain. The two designs are defined according to the Scope of Work 14012021M1, activity 399621, drafted October 6, 1998, and further refined in a conference telephone call on October 13, 1998, between Mark Balady, Jim Blink, Rob Howard and Chin-Fu Tsang. The 2 designs considered are: (1) Design A--Horizontal boreholes 1.0 m in diameter on both sides of the drift, with each borehole 8 m long and inclined to the drift axis by 30 degrees. The pillar between boreholes, measured parallel to the drift axis, is 3.3 m. In the current calculations, a simplified model of an isolated horizontal borehole 8 m long will be simulated. The horizontal borehole will be located in a heterogeneous fracture continuum representing the repository layer. Three different realizations will be taken from the heterogeneous field, representing three different locations in the rock. Seepage for each realization is calculated as a function of the percolation flux. Design B--Vertical boreholes, 1.0 m in diameter and 8.0 m deep, drilled from the bottom of an excavated 8.0 m diameter drift. Again, the drift with the vertical borehole will be assumed to be located in a heterogeneous fracture continuum, representing the rock at the repository horizon. Two realizations are considered, and seepage is calculated for the 8-m drift with and without the vertical 1-m borehole at its bottom.
Date: July 30, 1999
Creator: Li, Guomin; Tsang, Chin-Fu & Birkholzer, Jens

Construction safety program for the National Ignition Facility, July 30, 1999

Description: The Construction Safety Program (CSP) for NIF sets forth the responsibilities, guidelines, rules, policies and regulations for all workers involved in the construction, special equipment installation, acceptance testing, and start-up of NIF at LLNL during the construction period of NIF. During this period, all workers are required to implement measures to create a universal awareness which promotes safe practice at the work site, and which will achieve NIF's management objectives in preventing accidents and illnesses. Construction safety for NIF is predicated on everyone performing their jobs in a manner that prevents job-related disabling injuries and illnesses. Integrated Safety Management (ISM) is practiced in the execution of all activities associated with the NIF Project. The seven Principles of ISM are: (1) Line management is responsible for safety. (2) Clear roles and responsibilities are established and maintained. (3) Personnel possess competence commensurate with responsibilities. (4) Resource allocations are balanced, making ES and H a priority in project planning and execution. (5) Safety requirements are identified and implemented. (6) Hazard controls are tailored to the project work. (7) Operations are authorized before work begins.
Date: July 30, 1999
Creator: Benjamin, D W

Construction safety program for the National Ignition Facility, July 30, 1999 (NIF-0001374-OC)

Description: These rules apply to all LLNL employees, non-LLNL employees (including contract labor, supplemental labor, vendors, personnel matrixed/assigned from other National Laboratories, participating guests, visitors and students) and contractors/subcontractors. The General Rules-Code of Safe Practices shall be used by management to promote accident prevention through indoctrination, safety and health training and on-the-job application. As a condition for contracts award, all contractors and subcontractors and their employees must certify on Form S and H A-l that they have read and understand, or have been briefed and understand, the National Ignition Facility OCIP Project General Rules-Code of Safe Practices. (An interpreter must brief those employees who do not speak or read English fluently.) In addition, all contractors and subcontractors shall adopt a written General Rules-Code of Safe Practices that relates to their operations. The General Rules-Code of Safe Practices must be posted at a conspicuous location at the job site office or be provided to each supervisory employee who shall have it readily available. Copies of the General Rules-Code of Safe Practices can also be included in employee safety pamphlets.
Date: July 30, 1999
Creator: Benjamin, D W

COOPERATIVE LAND REUSE PROGRAM

Description: The objective of this study was to determine what financial return, if any, DOE would realize if they invest solely in removal of the asbestos from these three Hanford steam plants and the associated large bore distribution piping at the site. Once the asbestos was removed the strategy was to bring in companies that specialize in salvage and material re-use and have them remove, at no cost to DOE, the plants and the associated large bore piping. The salvage companies we contacted had said that if they didn't have to remove asbestos, they may be able to realize enough value from these plants to offset their demolition and/or dismantling cost. The results were not what we expected but they do offer DOE some favorable financial alternatives to their present approach. The study concluded that there was very little salvage and/or re-use value remaining in the steam plant material that could be used to offset the demolition and/or dismantling cost. The notable exception to this is the removal of the 24 inch steam piping that runs from 200E to 200W areas (see IDM executive summary under Dismantling cost). It is estimated that the re-use value of the 24-inch piping would more than pay for the dismantling cost of this piping. On a more favorable note, it does appear as though the cost of conventional demolition can be reduced by a factor of 3 to 5 if the asbestos is removed first and the demolition is performed using competitive and commercial practices. Both estimates in this study are similar except that IDM did not include floor slab removal nor remove the same quantity of piping. This is why we are using a range of 3 to 5 as a reduction factor. The IDM estimate (using union labor) for demolition after removal of ...
Date: July 30, 1999

Defense Health Care: Improvements Needed to Reduce Vulnerability to Fraud and Abuse

Description: A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO reviewed the Department of Defense's (DOD) health care system, focusing on: (1) DOD's estimates of the extent of health care fraud and abuse; (2) DOD's efforts to reduce health care fraud and abuse in civilian settings; and (3) initiatives and incentives that could improve DOD's antifraud efforts."
Date: July 30, 1999
Creator: United States. General Accounting Office.

Department of Energy: Office of Environmental Management's and Defense Programs' Fiscal Year 2000 Budget Request

Description: Correspondence issued by the General Accounting Office with an abstract that begins "GAO updated its previous report on the Department of Energy's (DOE) fiscal year (FY) 2000 budget request, focusing on: (1) selected projects and activities by the Office of Environmental Management in which part or all of the FY 2000 budget request or budget authority from previous years is not needed; and (2) GAO's analysis of Environmental Management's and Defense Programs' carryover funds from prior years to determine if funds are available that could be used to reduce DOE's FY 2000 budget request."
Date: July 30, 1999
Creator: United States. General Accounting Office.