NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts (open access)

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

Methods of preparation of the copper, cobalt, and titanium catalysts were outlined. The catalyst samples were then analyzed through nuclear magnetic and nuclear quadrupole resonance.
Date: February 1, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
A study of steady-state steam-water counterflow in porous media (open access)

A study of steady-state steam-water counterflow in porous media

Vapor-liquid counterflow in porous media arises in processes such as heat pipes, oil recovery and geothermal systems. Previous studies analysed these phenomena in separate contexts. This paper presents a unified description from which previous models result as limiting cases. The analysis includes capillarity, heat conduction, and Kelvin effects. The importance of each term to various processes is examined. Significantly, it is found that the critical heat flux is not constant but increases with decreasing permeability. A threshold permeability is identified below which steady states may not exist. Analogous conclusions are reached regarding liquid-dominated geothermal systems. 24 refs., 15 figs.
Date: February 1, 1990
Creator: Satik, C.; Parlar, M. & Yortsos, Y.C.
Object Type: Report
System: The UNT Digital Library
Control of alpha particle transport by spatially inhomogeneous ion cyclotron resonance heating (open access)

Control of alpha particle transport by spatially inhomogeneous ion cyclotron resonance heating

Control of the radial alpha particle transport by using Ion Cyclotron Range of Frequency waves is investigated in a large-aspect-ratio tokamak geometry. It is shown that spatially inhomogeneous ICRF-wave energy with properly selected frequencies and wave numbers can induce fast convective transport of alpha particles at the speed of order {upsilon}{sub alpha} {approximately} (P{sub RF}/n{sub {alpha}}{epsilon}{sub 0}) {rho}{sub p}, where P{sub RF} is the ICRF-wave power density, n{sub {alpha}} is the alpha density, {epsilon}{sub 0} is the alpha birth energy, and {rho}{sub p} is the poloidal gyroradius of alpha particles at the birth energy. Application to ITER plasmas is studied and possible antenna designs to control alpha particle flux are discussed. 8 refs., 3 figs.
Date: February 1, 1990
Creator: Chang, C. S.; Imre, K.; Weitzner, H. (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences) & Colestock, P. (Princeton Univ., NJ (USA). Plasma Physics Lab.)
Object Type: Report
System: The UNT Digital Library
The thermodynamic properties of 2-methylaniline and trans-(R,S)- decahydroquinoline (open access)

The thermodynamic properties of 2-methylaniline and trans-(R,S)- decahydroquinoline

Measurements leading to the calculation of the ideal-gas thermodynamic properties for 2-methylaniline and trans-(R,S)-decahydroquinoline are reported. Experimental methods included combustion calorimetry, adiabatic heat-capacity calorimetry, comparative ebulliometry, inclined-piston gauge manometry, and differential-scanning calorimetry (dsc). Entropies, enthalpies, and Gibbs energies of formation were derived for the ideal gas at selected temperatures for both compounds. Critical properties were determined for 2-methylaniline with the dsc. Measured combustion enthalpies, vapor pressures, critical properties, and ideal-gas entropies were compared with estimated and experimental literature values. 59 refs., 7 figs., 15 tabs.
Date: February 1, 1990
Creator: Steele, W. V.; Chirico, R. D.; Nguyen, A. & Knipmeyer, S. E.
Object Type: Report
System: The UNT Digital Library
Control of energetic ion confinement by ion cyclotron range of frequency waves (open access)

Control of energetic ion confinement by ion cyclotron range of frequency waves

It is shown that ICRF waves can induce fast convective radial transport of energetic ions in a tokamak geometry without affecting the background ion transport. Spatially inhomogeneous ICRF waves with directional parallel wave vectors are needed; otherwise, a net parallel flow of the energetic ions has to be present. 8 refs.
Date: February 1, 1990
Creator: Chang, C.S. (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences)
Object Type: Report
System: The UNT Digital Library
Simulations of plasma performance in a beam-driven tokamak fusion reactor with Q approx 2-3 (open access)

Simulations of plasma performance in a beam-driven tokamak fusion reactor with Q approx 2-3

Supershot profiles were used to simulate plasmas in a neutral-beam driven tokamak reactor designed to achieve fusion energy production with Q {approx} 2-3. Profiles from a TFTR supershot were scaled to larger radii, density, and electron temperature. The TRANSP code was used to calculate performance of these plasmas. Examples are given of steady-state plasmas with large beam-driven bootstrap currents. The required energy transport rate is comparable to that in TFTR, but the particle transport rate must be less. The PEST code indicates that the plasmas would be MHD stable if the central q{sub {Psi}} can be controlled. 8 refs., 13 figs., 4 tabs.
Date: February 1, 1990
Creator: Budny, R.; Jassby, D. L.; Manickam, J.; McCune, D. & Wieland, R.
Object Type: Report
System: The UNT Digital Library
Activities and Operations of the Advanced Computing Research Facility : January 1989-January 1990 (open access)

Activities and Operations of the Advanced Computing Research Facility : January 1989-January 1990

This report reviews the activities and operations of the Advanced Computing Research Facility (ACRF) for the period January 1, 1989, through January 31, 1990. The ACRF is operated by the Mathematics and Computer Science Division at Argonne National Laboratory. The facility's principal objective is to foster research in parallel computing. Toward this objective, the ACRF continues to operate experimental advanced computers and to sponsor new technology transfer efforts and new research projects.
Date: February 1990
Creator: Pieper, Gail W.
Object Type: Report
System: The UNT Digital Library
Predictive modelling of boiler fouling (open access)

Predictive modelling of boiler fouling

The primary objective of this work is the development of a comprehensive numerical model describing the time evolution of fouling under realistic heat exchanger conditions. As fouling is a complex interaction of gas flow, mineral transport and adhesion mechanisms, understanding and subsequently improved controlling of fouling achieved via appropriate manipulation of the various coupled, nonlinear processes in a complex fluid mechanics environment will undoubtedly help reduce the substantial operating costs incurred by the utilities annually, as well as afford greater flexibility in coal selection and reduce the emission of various pollutants. In a more specialized context the numerical model to be developed as part of this activity will be used as a tool to address the interaction of the various mechanisms controlling deposit development in specific regimes or correlative relationships. These should prove of direct use to the coal burning industry.
Date: February 1, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Photoinitiated electron transfer in multi-chromophoric species: Synthetic tetrads and pentads (open access)

Photoinitiated electron transfer in multi-chromophoric species: Synthetic tetrads and pentads

This research project involves the design, synthesis and study of the molecules which mimic many of the important aspects of photosynthetic electron and energy transfer. Specifically, the molecules are designed to mimic the following aspects of natural photosynthetic multistep electron transfer: electron donation from a tetrapyrrole excited singlet state, electron transfer between tetrapyrroles, electron transfer from tetrapyrroles to quinones, and electron transfer between quinones with different redox properties. In addition, they model carotenoid antenna function in photosynthesis (singlet-singlet energy transfer from carotenoid polyenes to chlorophyll) and carotenoid photoprotection from singlet oxygen damage (triplet-triplet energy transfer from chlorophyll to carotenoids).
Date: February 14, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Making Things Better: Competing in Manufacturing (open access)

Making Things Better: Competing in Manufacturing

This report considers ways to promote the restoration of American leadership in manufacturing technology. Some of the things that most need doing are up to industry— especially in handling people, from managers to engineers to shopfloor workers, and in forming stable, productive relationships between different segments of an industry complex. Government also has a critical role to play.
Date: February 1990
Creator: United States. Congress. Office of Technology Assessment.
Object Type: Report
System: The UNT Digital Library
Critical Connections: Communication for the Future (open access)

Critical Connections: Communication for the Future

The U.S. communication infrastructure is changing rapidly as a result of technological advances, deregulation, and an economic climate that is increasingly competitive. This change is affecting the way in which information is created, processed, transmitted, and provided to individuals and institutions. The report analyzes the implications of new communication technologies for business, politics, culture, and individuals, and suggests possible strategies and options for congressional consideration.
Date: February 1990
Creator: United States. Congress. Office of Technology Assessment.
Object Type: Report
System: The UNT Digital Library
Computed Tomography software and standards (open access)

Computed Tomography software and standards

This document establishes the software design, nomenclature, and conventions for industrial Computed Tomography (CT) used in the Nondestructive Evaluation Section at Lawrence Livermore National Laboratory. It is mainly a users guide to the technical use of the CT computer codes, but also presents a proposed standard for describing CT experiments and reconstructions. Each part of this document specifies different aspects of the CT software organization. A set of tables at the end describes the CT parameters of interest in our project. 4 refs., 6 figs., 1 tab.
Date: February 20, 1990
Creator: Azevedo, S. G.; Martz, H. E.; Skeate, M. F.; Schneberk, D. J. & Roberson, G. P.
Object Type: Report
System: The UNT Digital Library
Development of an advanced process for drying fine coal in an inclined fluidized bed (open access)

Development of an advanced process for drying fine coal in an inclined fluidized bed

The objective of this research project was to demonstrate a technically feasible and economically viable process for drying and stabilizing high-moisture subbituminous coal. Controlled thermal drying of coal fines was achieved using the inclined fluidized-bed drying and stabilization process developed by the Western Research Institute. The project scope of work required completion of five tasks: (1) project planning, (2) characterization of two feed coals, (3) bench-scale inclined fluidized-bed drying studies, (4) product characterization and testing, and (5) technical and economic evaluation of the process. High moisture subbituminous coals from AMAX Eagle Butte mine located in the Powder River Basin of Wyoming and from Usibelli Coal Mine, Inc. in Healy, Alaska were tested in a 10-lb/hr bench-scale inclined fluidized-bed. Experimental results show that the dried coal contains less than 1.5% moisture and has a heating value over 11,500 Btu/lb. The coal fines entrainment can be kept below 15 wt % of the feed. The equilibrium moisture of dried coal was less than 50% of feed coal equilibrium moisture. 7 refs., 60 figs., 47 tabs.
Date: February 1, 1990
Creator: Boysen, J. E.; Cha, C. Y.; Barbour, F. A.; Turner, T. F.; Kang, T. W.; Berggren, M. H. et al.
Object Type: Report
System: The UNT Digital Library
Wear mechanism and wear prevention in coal-fueled diesel engines (open access)

Wear mechanism and wear prevention in coal-fueled diesel engines

The overall objective of this program is to develop the engine and lubricant system design approach that has the highest probability for commercial acceptance. Several specific objectives can also be identified. These objectives include: definition of the dominant wear mechanisms prevailing in coal-fueled diesel engines; definition of the specific effect of each coal-related lube oil contaminant; determination of the potential of traditional engine lubrication design approaches to either solve or mitigate the effects of the coal related lube oil contaminants; evaluation of several different design approaches aimed specifically at preventing lube oil contamination or preventing damage due to lube oil contamination; and presentation of the engine/lubricant system design determined to have the most potential. 2 figs., 3 tabs.
Date: February 19, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Biological Processes in the Water Column of the South Atlantic Bight: Zooplankton Responses (open access)

Biological Processes in the Water Column of the South Atlantic Bight: Zooplankton Responses

The goal of the Fall Removal Experiment 1987 was to determine the processes affecting the dependent and fate of low salinity coastal water and of biological material therein during fall when winds are mainly south-to westward. Five zooplankton taxa, Acartia tonsa, (A. tonsa) Paracalanus species (sp), Temora turbinata (T. turbinata), Oncaea sp, and Sagitta enflata were examined. Data on the distribution of all five taxa were presented, and distribution over time was also studied. The abundance of A. tonsa decreased tenfold over the 13 day sampling period, Paracalanus varied twofold and T. Turbinata showed little variability. The A. tonsa decrease was postulated to result from food abundance or predation, although the possible role of size distribution, water displacement and chlorophyll distribution will be examined in the future. A possible role of turbulence in zooplankton abundance is being examined. 8 refs., 5 figs.
Date: February 7, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Flow excursion experiments with a Savannah River Mark 22 fuel assembly mockup (open access)

Flow excursion experiments with a Savannah River Mark 22 fuel assembly mockup

This concerns the transmittal of the Complete Quick Plot Set for Test 867{underscore}13, 90% OSV Power Best Estimate LOCA at 80 F, SRP-1,038. Attached for your information is the subject plot set containing data plots for the complete test spanning from about {minus}330 to 70 seconds, time scale enhancements at {minus}1 to 5 seconds, and a few custom plots. Unlike the previous tests, the power supply safety trips were returned to their non-recovery'' values with a 30% post-LOCA nominal flow reduction trip and 400 F metal temperature trips on the HP oscillograph and METRAscope. A couple of observations are noted comparing this test to its predecessor, Test 867{underscore}08.
Date: February 1, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
(Experimental development, testing and research work in support of the inertial confinement fusion program) (open access)

(Experimental development, testing and research work in support of the inertial confinement fusion program)

This report discusses: Cryogenic technology; polymer shell fabrication; glass shell fabrication and characterization; coating technology; development of characterization techniques; laser technology; and plasma research and instrumentation.
Date: February 28, 1990
Creator: Drake, D.J.; Luckhardt, R.; Moyer, S.; Armentrout, C.J.; Downs, R.L. & Moncur, K. (eds.)
Object Type: Report
System: The UNT Digital Library
Monitoring of Downstream Salmon and Steelhead at Federal Hydroelectric Facilities, 1989 Annual Report. (open access)

Monitoring of Downstream Salmon and Steelhead at Federal Hydroelectric Facilities, 1989 Annual Report.

This project is a part of the continuing Smolt Monitoring Program (SMP) to monitor Columbia Basin salmonid stocks coordinated by the Fish Passage Center (FPC). The SMP provides timely data to the Fish Passage Managers for in season flow and spill management for fish passage and post-season analysis by the FPC for travel time, relative magnitude and timing of the smolt migration. Sampling sites were McNary, John Day and Bonneville Dams under the SMP, and the Dalles Dam under the Fish Spill Memorandum of Agreement'' for 1989. All pertinent fish capture, condition and brand data, as well as dam operations and river flow data were incorporated into the FPC Fish Passage Data Information System (FPDIS). 15 refs., 6 figs., 6 tabs.
Date: February 19, 1990
Creator: Johnsen, Richard C.
Object Type: Report
System: The UNT Digital Library
The flash pyrolysis and methanolysis of biomass (wood) for production of ethylene, benzene and methanol (open access)

The flash pyrolysis and methanolysis of biomass (wood) for production of ethylene, benzene and methanol

The process chemistry of the flash pyrolysis of biomass (wood) with the reactive gases, H{sub 2} and CH{sub 4} and with the non-reactive gases He and N{sub 2} is being determined in a 1 in. downflow tubular reactor at pressures from 20 to 1000 psi and temperatures from 600 to 1000{degrees}C. With hydrogen, flash hydropyrolysis leads to high yields of methane and CO which can be used for SNG and methanol fuel production. With methane, flash methanolysis leads to high yields of ethylene, benzene and CO which can be used for the production of valuable chemical feedstocks and methanol transportation fuel. At reactor conditions of 50 psi and 1000{degrees}C and approximately 1 sec residence time, the yields based on pine wood carbon conversion are up to 25% for ethylene, 25% for benzene, and 45% for CO, indicating that over 90% of the carbon in pine is converted to valuable products. Pine wood produces higher yields of hydrocarbon products than Douglas fir wood; the yield of ethylene is 2.3 times higher with methane than with helium or nitrogen, and for pine, the ratio is 7.5 times higher. The mechanism appears to be a free radical reaction between CH{sub 4} and the …
Date: February 1, 1990
Creator: Steinberg, M.; Fallon, P. T. & Sundaram, M. S.
Object Type: Article
System: The UNT Digital Library
Confined Vortex Scrubber (open access)

Confined Vortex Scrubber

The program objective is to demonstrate efficient removal of fine particulates to sufficiently low levels to meet proposed small scale coal combustor emission standards. This is to be accomplished using a novel particulate removal device, the Confined Vortex Scrubber. This is the first quarterly technical progress report under this contract. Accordingly, a summary of the cleanup concept and the structure of the program is given here.
Date: February 1, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Nitrogen oxide abatement by distributed fuel addition (open access)

Nitrogen oxide abatement by distributed fuel addition

Mechanisms governing the inter-conversion and destruction of nitrogenous species in the fuel rich reburning zone of a laboratory coal combustor were explored. Emphasis was on a configuration in which the primary flame was of pulverized coal and the reburning fuel was natural gas, although other fuels were also considered. The objective was to extract models to be used in estimating reburning effectiveness in practical combustors. Reburning mechanisms occur in two regimes; one in which fast reactions between NO and hydrocarbons are usually limited by mixing; the other in which reactions have slowed and in which known gas phase chemistry controls. For the latter regime, a simplified model based on detailed gas phase chemical kinetic mechanisms and known rate coefficients was able to predict temporal profiles of NO, NH{sub 3} and HCN. Reactions with hydrocarbons played important roles in both regimes and the Fenimore N{sub 2} fixation reactions limited reburning effectiveness at low primary NO values.
Date: February 1, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Object Type: Report
System: The UNT Digital Library
The optical properties of beryllium (open access)

The optical properties of beryllium

We review the published data on the optical properties of beryllium for the spectral region from 0.03 to 300 eV. In the visible and infrared spectral regions, where published data from various authors show very large variations, we have performed experiments that identify the most probable sources of error, and use this information to select the best data from published sources. The effects of surface oxide overlayers have also been studied. In the far infrared spectral region, where only normal incidence reflectance data are available, and in the extreme ultraviolet, where only transmission data are available, there is insufficient information to fully determine the optical properties at each photon energy. Between 0.06 and 26 eV, however, a normal incidence reflectance curve is fully determined. This curve has been used for a Kramers{endash}Kronig analysis to determine the optical properties in this spectral range. 10 refs., 13 figs., 3 tabs.
Date: February 1, 1990
Creator: Arakawa, E.T. (Oak Ridge National Lab., TN (USA)); Callcott, T.A. & Chang, Yun-ching (Oak Ridge National Lab., TN (USA) Tennessee Univ., Knoxville, TN (USA). Dept. of Physics)
Object Type: Report
System: The UNT Digital Library
LLNL Waste Minimization Program Plan (open access)

LLNL Waste Minimization Program Plan

This document is the February 14, 1990 version of the LLNL Waste Minimization Program Plan (WMPP). The Waste Minimization Policy field has undergone continuous changes since its formal inception in the 1984 HSWA legislation. The first LLNL WMPP, Revision A, is dated March 1985. A series of informal revision were made on approximately a semi-annual basis. This Revision 2 is the third formal issuance of the WMPP document. EPA has issued a proposed new policy statement on source reduction and recycling. This policy reflects a preventative strategy to reduce or eliminate the generation of environmentally-harmful pollutants which may be released to the air, land surface, water, or ground water. In accordance with this new policy new guidance to hazardous waste generators on the elements of a Waste Minimization Program was issued. In response to these policies, DOE has revised and issued implementation guidance for DOE Order 5400.1, Waste Minimization Plan and Waste Reduction reporting of DOE Hazardous, Radioactive, and Radioactive Mixed Wastes, final draft January 1990. This WMPP is formatted to meet the current DOE guidance outlines. The current WMPP will be revised to reflect all of these proposed changes when guidelines are established. Updates, changes and revisions to the …
Date: February 14, 1990
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Computer aided surface representation (open access)

Computer aided surface representation

The central research problem of this project is the effective representation, computation, and display of surfaces interpolating to information in three or more dimensions. If the given information is located on another surface, then the problem is to construct a surface defined on a surface''. Sometimes properties of an already defined surface are desired, which is geometry processing''. Visualization of multivariate surfaces is possible by means of contouring higher dimensional surfaces. These problems and more are discussed below. The broad sweep from constructive mathematics through computational algorithms to computer graphics illustrations is utilized in this research. The breadth and depth of this research activity makes this research project unique.
Date: February 19, 1990
Creator: Barnhill, R.E.
Object Type: Report
System: The UNT Digital Library