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1,668 Matching Results
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Manufacturing tailored property ceramic composites
Composite materials are desirable for many advanced engineering applications where the properties of a single phase material cannot meet all of the service requirements; however, existing process technology has limited the development and commercialization of composites. Lack of reproducible sintering to high density is one of the major obstacles to commercializing ceramic composites. Final-stage, non-reactive liquid phase sintering (NLPS) theory provides metrics for sinterability that can be used as guidelines to design and manufacture dense ceramic-filled-glass (CFG) composites. Additionally, within the constraints defined by the NLPS theory, sum-property models can be used to predict CFG composite properties, and to design composites with properties tailored to specific applications. By integrating composite process models with composite property models, processable, application-tailored CFG composites for microelectronics packaging have been designed and fabricated.
Date:
November 14, 1994
Creator:
Ewsuk, K. G. & Harrison, L. W.
Object Type:
Report
System:
The UNT Digital Library
Project W-049H instrument and control Acceptance Test Procedure
The purpose of this Acceptance Test Procedure (ATP) for the Project W-049H, Treated Effluent Disposal Facility, is to verify that the instrument and control systems have been installed in accordance with the design documents and function as required by the project criteria. The instrument and control system includes three operator control stations, modems, and general purpose LAN interface cabinets in the Effluent Treatment Facility control room; two pump stations; disposal station pumping building; and all local control units installed in the fold. Testing will be performed using actual signals when available and simulated signals when actual signals are unavailable.
Date:
November 16, 1994
Creator:
Carrigan, M. C.
Object Type:
Report
System:
The UNT Digital Library
Intermediate scale borehole (Room C): In situ data report (January 1989--June 1993)
Data are presented from the intermediate scale borehole test, an in situ test fielded in the pillar separating Rooms C1 and C2 at the Waste Isolation Pilot Plant (WIPP). The test was to provide data on the influence of scale, if any, on the structural behavior of underground openings in salt. These data include selected fielding information, test configuration, instrumentation activities, and comprehensive results from a large number of gages. Construction of the test began in December 1989, with the drilling of the intermediate scale borehole in December 1990. Gage data in this report cover the period from January 1989 through June 1993.
Date:
November 1, 1994
Creator:
Munson, D. E.; Christian-Frear, T. L.; Baird, G. T.; Labreche, D. A.; Ball, J. R.; Jones, R. L. et al.
Object Type:
Report
System:
The UNT Digital Library
D{O} upgrade muon electronics design
The planned luminosity for the upgrade is ten times higher than at present (L {approximately} 10{sup 32}cm{sup {minus}2}s{sup {minus}1}) and involves a time between collisions as small as 132 ns. To operate in this environment, completely new electronics is required for the 17,500 proportional drift tubes of the system. These electronics include a deadtimeless readout, a digital TDC with about 1 ns binning for the wire signals, fast charge integrators and pipelined ADCs for digitizing the pad electrode signals, a new wire signal triggering scheme and its associated trigger logic, and high level DSP processing. Some test results of measurements performed on prototype channels and a comparison with the existing electronics are presented.
Date:
November 1, 1994
Creator:
Baldin, B.; Green, D.; Haggerty, H. & Hansen, S.
Object Type:
Article
System:
The UNT Digital Library
Fast flux test facility, transition project plan
The FFTF Transition Project Plan, Revision 1, provides changes and project baseline for the deactivation activities necessary to transition the FFTF to a radiologically and industrially safe shutdown condition.
Date:
November 15, 1994
Creator:
Guttenberg, S.
Object Type:
Report
System:
The UNT Digital Library
The photosynthetic acclimation of Lolium perenne growing in a free-air CO{sub 2} enrichment (FACE) system
Stands of Ryegrass (Lolium perenne L. cv. Bastion) were grown in the field at ambient or elevated (600{mu}mol/mol) CO{sub 2} concentration, high (560Kg/ha) or low (140Kg/ha) nitrogen addition and with a frequent (every 4 weeks) or infrequent (every 8 weeks) cutting regime. Plants were in the second year of a 3 year experiment. Exposure to elevated CO{sub 2} was carried out with a Free-Air CO{sub 2} Enrichment (FACE) system which provides the most {open_quote}realistic{close_quote} system of CO{sub 2} fumigation currently available. Elevated CO{sub 2} increased diurnal CO{sub 2} assimilation by between 34 and 88% whilst reducing rates of stomatal conductance by between 1 and 42%. However, analysis of the A vs. Ci response showed considerable acclimation of the photosynthetic apparatus in response to elevated CO{sub 2} - Vc{sub max} as an in vivo measure of RubisCO activity, decreased by between 29 and 35% in high CO{sub 2}, whilst J{sub max}, as a measure of the RubP regeneration capacity, showed no significant change. Two out of three additional perennial grassland species studied showed similar acclamatory behavior to Ryegrass. Diurnal assimilation rate, J{sub max} and, in most cases, Vc{sub max}, increased significantly directly after cutting of Ryegrass stands, but nitrogen treatment had …
Date:
November 1, 1994
Creator:
Bryant, J. B.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Meeting on flows of granular materials in complex geometries
The International Energy Agency Fossil Fuel Multiphase Flow Sciences Agreement has been in effect since 1986. The traditional mechanism for the effort has been information exchange, effected by the inclusion of scientists in annual Executive committee meetings, by exchange of reports and papers, and by visits of scientists to one another`s institutions. In a sequence of informal meetings and at the 1993 Executive committee meeting, held in Pittsburgh, US in March 1994, it was decided that more intensive interactions could be productive. A candidate for such interactions would be specific projects. Each of these would be initiated through a meeting of scientists in which feasibility of the particular project was decided, followed by relatively intense international co-operation in which the work would be done. This is a report of the first of these meetings. Official or unofficial representatives from Canada, italy, japan, mexico, the United Kingdom, and the US met in Albuquerque, New Mexico, US, to consider the subject Flows of Granular Materials in Complex Geometries. Representatives of several other countries expressed interest but were unable to attend this meeting. Sixteen lectures were given on aspects of this topic. It was decided that a co-operative effort was desirable and possible. …
Date:
November 1, 1994
Creator:
Passman, S. L.; Fukushima, E. & Evans, R. E.
Object Type:
Article
System:
The UNT Digital Library
Development of subcontractor indirect cost and other direct cost at the DOE Fernald Site
The Fernald Environmental Restoration Management Corporation (FERMCO) took great strides in the development of cost estimates at Fernald. There have been many opportunities to improve on how the policies and procedures pertaining to cost estimates were to be implemented. As FERMCO took over the existing Fernald facility, the Project Controls Division began to format the estimating procedures and tools to do business at Fernald. The Estimating Department looked at the problems that pre-existed at the site. One of the key problems that FERMCO encountered was how to summarized the direct and indirect accounts of each subcontracted estimate. Direct costs were broken down by prime and sub-prime accounts. This presented a level of detail that had not been experienced at the site before; it also created many issues concerning accounts and definitions to be applied to ``all other accounts associated with a project.`` Existing subcontract indirect cost accounts were reviewed from existing historical estimates. It was found that some were very detailed and some were not. The Estimating Department was given the task of standardizing the accounts and percentages for each of the subcontractor indirect costs. Then, as the project progressed, the percentages could be revised with actual estimates, subcontract comparisons, …
Date:
November 18, 1994
Creator:
Cossman, R. L.
Object Type:
Article
System:
The UNT Digital Library
Summary report: Assessment and opportunity identification of energy efficient pollution prevention technologies and processes
On October 24, 1992, the President signed the Energy Policy Act of 1992 (EPAct, Public Law 102-486). Section 2108, subsections (b) and (c), of EPAct requires the Department of Energy to identify opportunities to demonstrate energy efficient pollution prevention technologies and processes; to assess the availability and the energy, environmental, and cost effects of such technologies; and to report the results within one year. This report is in response to that requirement. National waste reduction efforts in both the private and public sectors encompass a variety of activities to decrease the amount of wastes that ultimately enter their air, water, and land. DOE`s Office of Industrial Technologies (DOE/OIT) recognized the importance of these efforts and confirmed the federal government`s commitment to waste reduction by establishing the Industrial Waste Program (IWP) in 1990. The program is driven by industry and national needs, and is working on new technologies and information dissemination that industry identifies as vital. The national benefits of new technologies do not accrue to the economy until transferred to industry and incorporated into commercially available processes or products.
Date:
November 1, 1994
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Radionuclide logging of Tank 216-T-106, borehole 299-W10-196
None
Date:
November 4, 1994
Creator:
Price, R. K.
Object Type:
Report
System:
The UNT Digital Library
Feature-based tolerancing for advanced manufacturing applications
A primary requirement for the successful deployment of advanced manufacturing applications is the need for a complete and accessible definition of the product. This product definition must not only provide an unambiguous description of a product`s nominal shape but must also contain complete tolerance specification and general property attributes. Likewise, the product definition`s geometry, topology, tolerance data, and modeler manipulative routines must be fully accessible through a robust application programmer interface. This paper describes a tolerancing capability using features that complements a geometric solid model with a representation of conventional and geometric tolerances and non-shape property attributes. This capability guarantees a complete and unambiguous definition of tolerances for manufacturing applications. An object-oriented analysis and design of the feature-based tolerance domain was performed. The design represents and relates tolerance features, tolerances, and datum reference frames. The design also incorporates operations that verify correctness and check for the completeness of the overall tolerance definition. The checking algorithm is based upon the notion of satisfying all of a feature`s toleranceable aspects. Benefits from the feature-based tolerance modeler include: advancing complete product definition initiatives, incorporating tolerances in product data exchange, and supplying computer-integrated manufacturing applications with tolerance information.
Date:
November 1, 1994
Creator:
Brown, C. W.; Kirk, W. J. III; Simons, W. R.; Ward, R. C. & Brooks, S. L.
Object Type:
Article
System:
The UNT Digital Library
Envelope evolution of a laser pulse in an active medium
The authors show that the envelope velocity, v{sub env}, of a short laser pulse can, via propagation in an active medium, be made less than, equal to, or even greater than c, the vacuum phase velocity of light. Simulation results, based on moving frame propagation equations coupling the laser pulse, active medium and plasma, are presented, as well as equations that determines the design value of super- and sub-luminous v{sub env}. In this simulation the laser pulse evolves in time in a moving frame as opposed to their earlier work where the profile was fixed. The elimination of phase slippage and pump depletion effects in the laser wakefield accelerator is discussed as a particular application. Finally they discuss media properties necessary for an experimental realization of this technique.
Date:
November 1, 1994
Creator:
Fisher, D. L.; Tajima, T.; Downer, M. C. & Siders, C. W.
Object Type:
Report
System:
The UNT Digital Library
The influence of surface structure on the interaction of water with TiO{sub 2}(100)
The influence of surface structure on the interaction of water with TiO{sub 2}(100) (rutile) was investigated. Two unique surface structures of the (100) crystal face can be prepared by oxidation (the bulk-terminated surface) and by vacuum reduction (the (110)- microfaceted surface). Thermal desorption profiles, which measure of the strength of the adsorbate-surface interaction, indicate that submonolayer coverages of water are more stable on the bulk-terminated surface than on the (110)-microfaceted surface. Also, subtle differences exist in the way water interacts with 2-coordinate O{sup 2{minus}} sites on these two surfaces. The implications of these results for chemistry on microcrystallines particle are considered.
Date:
November 1, 1994
Creator:
Henderson, M. A.
Object Type:
Article
System:
The UNT Digital Library
Flat panel planar optic display
A prototype 10 inch flat panel Planar Optic Display, (POD), screen has been constructed and tested. This display screen is comprised of hundreds of planar optic class sheets bonded together with a cladding layer between each sheet where each glass sheet represents a vertical line of resolution. The display is 9 inches wide by 5 inches high and approximately 1 inch thick. A 3 milliwatt HeNe laser is used as the illumination source and a vector scanning technique is employed.
Date:
November 1, 1994
Creator:
Veligdan, J. T.
Object Type:
Report
System:
The UNT Digital Library
Material unaccounted for at the Southwest Experimental Fast Oxide Reactor: The SEFOR MUF
The U.S. Atomic Energy Commission contracted with the General Electric Company to design, construct, and operate the Southwest Experimental Fast Oxide Reactor (SEFOR) to measure the Doppler effect for fast neutron breeder reactors. It contracted with Nuclear Fuel Services to fabricate the fuel rods for the reactor. When the reactor went critical in May, 1969, it appeared that some of the mixed uranium-plutonium oxide (MOX) fuel rods did not contain the specified quantity of plutonium. The SEFOR operators soon found several fuel rods which appeared to be low in plutonium. The safeguards group at Brookhaven was asked to look into the problem and, if possible, determine how much plutonium was missing from the unirradiated rods and from the larger number which had been slightly irradiated in the reactor. It was decided that the plutonium content of the unirradiated and irradiated rods could be measured relative to a reference rod using a high resolution gamma-ray detector and also by neutron measurements using an auto-correlation circuit recently developed at the Naval Research Laboratory (NRL). During the next two years, Brookhaven personnel and C.V. Strain of NRL made several trips to the SEFOR reactor. About 250 of the 775 rods were measured by …
Date:
November 7, 1994
Creator:
Higinbotham, W. A.
Object Type:
Report
System:
The UNT Digital Library
APEX user`s guide - (Argonne production, expansion, and exchange model for electrical systems), version 3.0
This report describes operating procedures and background documentation for the Argonne Production, Expansion, and Exchange Model for Electrical Systems (APEX). This modeling system was developed to provide the U.S. Department of Energy, Division of Fossil Energy, Office of Coal and Electricity with in-house capabilities for addressing policy options that affect electrical utilities. To meet this objective, Argonne National Laboratory developed a menu-driven programming package that enables the user to develop and conduct simulations of production costs, system reliability, spot market network flows, and optimal system capacity expansion. The APEX system consists of three basic simulation components, supported by various databases and data management software. The components include (1) the investigation of Costs and Reliability in Utility Systems (ICARUS) model, (2) the Spot Market Network (SMN) model, and (3) the Production and Capacity Expansion (PACE) model. The ICARUS model provides generating-unit-level production-cost and reliability simulations with explicit recognition of planned and unplanned outages. The SMN model addresses optimal network flows with recognition of marginal costs, wheeling charges, and transmission constraints. The PACE model determines long-term (e.g., longer than 10 years) capacity expansion schedules on the basis of candidate expansion technologies and load growth estimates. In addition, the Automated Data Assembly Package …
Date:
November 1, 1994
Creator:
VanKuiken, J. C.; Veselka, T. D.; Guziel, K. A.; Blodgett, D. W.; Hamilton, S.; Kavicky, J. A. et al.
Object Type:
Report
System:
The UNT Digital Library
Machine recognition of navel orange worm damage in X-ray images of pistachio nuts
Insect infestation increases the probability of aflatoxin contamination in pistachio nuts. A non-destructive test is currently not available to determine the insect content of pistachio nuts. This paper presents the use of film X-ray images of various types of pistachio nuts to assess the possibility of machine recognition of insect infested nuts. Histogram parameters of four derived images are used in discriminant functions to select insect infested nuts from specific processing streams.
Date:
November 1, 1994
Creator:
Keagy, P. M.; Schatzki, T. F. & Parvin, B.
Object Type:
Article
System:
The UNT Digital Library
Transport reduction by current profile control in the reversed field pinch
An auxiliary poloidal inductive electric field applied to a reversed field pinch (RFP) plasma reduces the current density gradient, slows the growth of m = 1 tearing fluctuations, suppresses their associated sawteeth, and doubles the energy confinement time. This experiment attacks the dominant RFP plasma loss mechanism of parallel streaming in a stochastic magnetic field. The auxiliary electric field flattens the current profile and reduces the magnetic fluctuation level. Since a toroidal flux change linking the plasma is required to generate the inductive poloidal electric field, the current drive is transient to avoid excessive perturbation of the equilibrium. To sustain and enhance the improved state, electrostatic and RF current drivers are being developed. A novel electrostatic current drive scheme uses a plasma source for electron injection, and the lower-hybrid wave is a good candidate for RF current drive.
Date:
November 1, 1994
Creator:
Sarff, J. S.; Almagri, A. F. & Cekic, M.
Object Type:
Report
System:
The UNT Digital Library
Exotic colliders
The motivation, feasibility and potential for two unconventional collider concepts - the Gamma-Gamma Collider and the Muon Collider - are described. The importance of the development of associated technologies such as high average power, high repetition rate lasers and ultrafast phase-space techniques are outlined.
Date:
November 1, 1994
Creator:
Chattopadhyay, S.
Object Type:
Article
System:
The UNT Digital Library
242T FACP replacement
This Acceptance Test Procedure (ATP) has been prepared to demonstrate that the Fire Protection system functions as required by project criteria. This ATP will test the Pyrotronic CP-400 fire alarm control panel (FACP), and interfaces with the radio fire alarm reporting box, alarm/supervisory initiating devices, and alarm indicating appliances. This document is to certify the installation and testing of the fire alarm control panel and all attached devices to insure the Hanford Fire Dept. receives the proper signals. This fire alarm control panel is located in Bldg. 242T in the 200 W Area of Hanford.
Date:
November 17, 1994
Creator:
Ferry, M. F.
Object Type:
Report
System:
The UNT Digital Library
Electron drift velocities of Ar-CO{sub 2}-CF{sub 4} gas mixtures
The muon spectrometer for the D0 experiment at Fermi National Accelerator Laboratory uses proportional drift tubes filled with an Ar-CO{sub 2}-CF{sub 4} gas mixture. Measurements of drift velocity as a function of electric field magnitude for 90%-5%-5% and 90%-4%-6% Ar-CO{sub 2}-CF{sub 4} mixtures are presented, and our operational experiences with these gases at D0 is discussed.
Date:
November 1, 1994
Creator:
Markeloff, R.; Haggerty, H. & Shao, Y.
Object Type:
Article
System:
The UNT Digital Library
The Multi-Function Waste Tank Facility (MWTF) surplus equipment report
None
Date:
November 14, 1994
Creator:
Cruz, V. J. & Epperson, E. M.
Object Type:
Report
System:
The UNT Digital Library
242-A evaporator quality assurance project plan: Revision 1
The scope of this quality assurance project plan (Plan) is sampling and analytical services including, but not limited to, sample receipt, handling and storage, analytical measurements, submittal of data deliverables, archiving selected portions of samples, returning unneeded sample material to Westinghouse Hanford Company (WHC), and/or sample disposal associated with candidate feed samples and process condensate compliance samples. Sampling and shipping activities are also included within the scope. The purpose of this project is to provide planning, implementation, and assessment guidance for achieving established data quality objectives measurement parameters. This Plan requires onsite and offsite laboratories to conform to that guidance. Laboratory conformance will help ensure that quality data are being generated and therefore, that the 242-A evaporator is operating in a safe and compliant manner. The 242-A evaporator feed stream originates from double-shell tanks (DSTs) identified as candidate feed tanks. The 242-A evaporator reduces the volume of aqueous waste contained in DSTs by boiling off water and sending it to the Liquid Effluent Retention Facility (LERF) storage basin before further treatment. The slurry product is returned to DSTs. Evaporation results in considerable savings by reducing the volume of mixed waste for disposal.
Date:
November 4, 1994
Creator:
Tucker, B. J.
Object Type:
Report
System:
The UNT Digital Library
ESnet Program Plan 1994
This Program Plan characterizes ESnet with respect to the current and future needs of Energy Research programs for network infrastructure, services, and development. In doing so, this document articulates the vision and recommendations of the ESnet Steering Committee regarding ESnet`s development and its support of computer networking facilities and associated user services. To afford the reader a perspective from which to evaluate the ever-increasing utility of networking to the Energy Research community, we have also provided a historical overview of Energy Research networking. Networking has become an integral part of the work of DOE principal investigators, and this document is intended to assist the Office of Scientific Computing in ESnet program planning and management, including prioritization and funding. In particular, we identify the new directions that ESnet`s development and implementation will take over the course of the next several years. Our basic goal is to ensure that the networking requirements of the respective scientific programs within Energy Research are addressed fairly. The proliferation of regional networks and additional network-related initiatives by other Federal agencies is changing the process by which we plan our own efforts to serve the DOE community. ESnet provides the Energy Research community with access to many …
Date:
November 1, 1994
Creator:
Merola, S.
Object Type:
Report
System:
The UNT Digital Library