65 Matching Results

Search Results

Results: 1 - 24 next
open access

Development of a Coal Quality Expert

Description: Task 3 provides detailed characterization of fuel properties of the test coals and in-depth evaluation of their performance characteristics under controlled pilot-scale combustion testing. Results from this task provide fundamental information required to develop some of the improved algorithms for the CQE. Both bench-scale fuel characterization and test furnace performance evaluations are being performed under this task. All pilot-scale combustion tests under this task have been completed. Top… more
Date: May 20, 1993
Partner: UNT Libraries Government Documents Department
open access

Moored Instrument for Time Series Studies of Primary Production and Other Microbial Rate Processes

Description: The goal of this project is to build and test a Time Series Submersible Incubation Device (TS-SID) capable of the autonomous in situ measurement of phytoplankton production and other rate processes for a period of up at least three months. The instrument is conceptually based on a recently constructed Submersible Incubation Device (SID). The TS-SID is to possess the ability to periodically incubate samples in the presence of an appropriate tracer, and to store 94 chemically fixed subsamples for… more
Date: January 20, 1993
Creator: Taylor, C. D. & Doherty, K. W.
Partner: UNT Libraries Government Documents Department
open access

Math and Science School (MASS): A Department of Energy enhancement program to benefit students from Native American Tribes affected by the Hanford Reservation

Description: Math and Science School is a program designed to enrich and encourage elementary students and teachers of the Confederated Tribes of the Umatilla Indian Reservation in the areas of mathematics and science activities. By providing access to special hands-on workshop sessions held in the mobile science laboratory at the school sites during the school year for students and teachers and with a separate summer inservice program for students, elementary children and teachers are encouraged to explore… more
Date: March 20, 1993
Creator: Jaeger, M.
Partner: UNT Libraries Government Documents Department
open access

Electronic states in systems of reduced dimensionality. [Dept. of Physics and Astronomy and Condensed Matter and Surface Sciences Program, Ohio Univ. , Athens, Ohio]

Description: The common theme of the research is the effects of electronic interactions on the properties of systems. Specifically, work was done in the following areas: magnetically modulated systems, Raman and EELS in superlattices, ballistic quantum interference effects, quantum dot arrays, and optical response of undoped fullerene crystals.
Date: May 20, 1993
Creator: Ulloa, S.E.
Partner: UNT Libraries Government Documents Department
open access

Fundamental mechanisms in flue gas conditioning

Description: We performed a wide variety of laboratory analyses during the past quarter. As with most of the work we performed during the previous quarter, our recent efforts were primarily directed toward the determination of the effects of adsorbed water on the cohesivity and tensile strength of powders. We also continued our analyses of dust cake ashes that have had the soluble compounds leached from their particle surfaces by repeated washings with water. Our analyses of leached and unleached dust cake … more
Date: January 20, 1993
Creator: Snyder, T. R. & Bush, P. V.
Partner: UNT Libraries Government Documents Department
open access

Microwave Michelson Interferometer system report of first use on a railgun, Green Farm, San Diego, CA

Description: This report summarizes the successful first attempt to use a Michelson microwave interferometer to measure the position of a projectile throughout its acceleration by a railgun. The test was performed at the DNA Green Farm facility operated by Maxwell Labs Inc. The test was performed using the ARDEC-ACB gun to accelerate a 1.1 kg polycarbonate projectile-to about 2.5 km/s. The projectile had an initial injection velocity of about 490 m/s.
Date: October 20, 1993
Creator: Hawke, R. S.; Greenwood, D.; Morrison, J. & Schildmeyer, F.
Partner: UNT Libraries Government Documents Department
open access

SPECT assay of radiolabeled monoclonal antibodies. Progress report, September 1, 1992--August 24, 1993

Description: The overall goal of this project is to improve the effectiveness of single photon emission computed tomography (SPECT) to image and quantify radiolabeled monoclonal antibodies. During the past year, we have made significant progress toward this goal, and this report summarizes that work. Our efforts have been mainly directed along three fronts. First, we have developed and tested new reconstruction methods including three-dimensional iterative algorithms that model non-uniform attenuation and d… more
Date: August 20, 1993
Creator: Jaszczak, R. J.
Partner: UNT Libraries Government Documents Department
open access

Transient adsorption experiment: Salinity and noncondensible gas effects. Quarterly report, July--September 1993

Description: The purpose of this project is to analyze the adsorption and desorption of steam in geothermal reservoirs, considering the effects of dissolved salts and of noncondensible gases. This report details activities during the gases. This report details activities during the reporting period of July through September 1993.
Date: September 20, 1993
Partner: UNT Libraries Government Documents Department
open access

Criticality safety evaluation for Portsmouth X-345 High-Enriched-Uranium storage area

Description: This report evaluates nuclear criticality safety for the High-Enriched Uranium storage area of the X-345 building of the Portsmouth Gaseous Diffusion Plant. The effects of loss of moderation or mass control are examined for storage units in or out of the storage receptacles. Recommendations are made for decreasing criticality hazards under some conditions of storage or handling considered to be hazardous.
Date: September 20, 1993
Creator: Koponen, B. L.
Partner: UNT Libraries Government Documents Department
open access

The {eta}{sub 6} at LEP and TRISTAN

Description: The {eta}{sub 6} is a {open_quotes}heavy axion{close_quotes} remnant of dynamical electroweak symmetry breaking by a color sextet quark condensate. Electroweak scale color instanton interactions allow it to be both very massive and yet be responsible for Strong CP conservation in the color triplet quark sector. It may have been seen at LEP via its two-photon decay mode and at TRISTAN via its hadronic decay modes.
Date: January 20, 1993
Creator: Kang, K.; Knowles, I. G. & White, A. R.
Partner: UNT Libraries Government Documents Department
open access

Fundamental mechanisms in flue gas conditioning. Quarterly report, October 1992--December 1992

Description: We performed a wide variety of laboratory analyses during the past quarter. As with most of the work we performed during the previous quarter, our recent efforts were primarily directed toward the determination of the effects of adsorbed water on the cohesivity and tensile strength of powders. We also continued our analyses of dust cake ashes that have had the soluble compounds leached from their particle surfaces by repeated washings with water. Our analyses of leached and unleached dust cake … more
Date: January 20, 1993
Creator: Snyder, T. R. & Bush, P. V.
Partner: UNT Libraries Government Documents Department
open access

Moored Instrument for Time Series Studies of Primary Production and Other Microbial Rate Processes. Progress Report

Description: The goal of this project is to build and test a Time Series Submersible Incubation Device (TS-SID) capable of the autonomous in situ measurement of phytoplankton production and other rate processes for a period of up at least three months. The instrument is conceptually based on a recently constructed Submersible Incubation Device (SID). The TS-SID is to possess the ability to periodically incubate samples in the presence of an appropriate tracer, and to store 94 chemically fixed subsamples for… more
Date: January 20, 1993
Creator: Taylor, C. D. & Doherty, K. W.
Partner: UNT Libraries Government Documents Department
open access

Streak tube photocathode development program. Phase 2, Final technical report

Description: This report details the progress made toward developing a streak tube with greater than 1% quantum efficiency at a wavelength of 1300 nm. The achieved performance is the result of approximately three years of effort. The goal of Phase 2 of this contract was to seal a working 1.3 {mu}m streak tube. This effort was focused in two areas. First there was a continuing effort to further develop and demonstrate the cathodes ability to meet the stated requirements. The second effort was aimed at solvin… more
Date: November 20, 1993
Partner: UNT Libraries Government Documents Department
open access

High SO{sub 2} removal efficiency testing. Technical progress report, [October 1--December 31, 1992]

Description: Baseline testing at the ``base`` site. Tampa Electric Company`s (TECo`s) Big Bend Station, commenced on September 28 and was completed on October 2. Initial results from this testing were presented in the previous Technical Progress Report, but a more complete discussion is provided in this report. Parametric testing was conducted at the Big Bend site during this quarter to evaluate the effects of dibasic acid (DBA) addition on system SO{sub 2} removal performance. The parametric tests were con… more
Date: January 20, 1993
Creator: Blythe, G.
Partner: UNT Libraries Government Documents Department
open access

Surface electrochemical control for fine coal and pyrite separation. Final report

Description: Laboratory flotation tests were carried out on three coals and on coal pyrite. Floatability measurements included natural floatability, flotation with a xanthate collector and salt flotation. The ranking of the floatability of the three coals were: Upper Freeport > Pittsburgh > Illinois. The floatability of mineral pyrite and coal pyrite increased markedly with xanthate concentration, but decreased with increased pH. In general, coal pyrite was more difficult to float than mineral pyrite. This … more
Date: January 20, 1993
Creator: Wadsworth, Milton E.; Bodily, David M.; Hu, Weibai; Chen, Wanxiong; Huang, Qinping; Liang, Jun et al.
Partner: UNT Libraries Government Documents Department
open access

Robotic weld overlay coatings for erosion control. [Quarterly report, July--September 1993]

Description: In the previous period of work, twelve overlay hardfacing alloys were selected for erosion testing based upon a literature review. All twelve coatings were deposited on 1018 steel substrates using the plasma arc welding process. Ten samples from each coating were prepared for erosion testing. The coating deposition and sample preparation procedures were described in the previous quarterly report. During the past quarter, all the coatings were erosion tested at 400 C. The erosion resistance of e… more
Date: October 20, 1993
Creator: Levin, B. F.; DuPont, J. N. & Marder, A. R.
Partner: UNT Libraries Government Documents Department
open access

Non-invasive measurements of granular flows by magnetic resonance imaging. Technical progress report for the quarter ending December 31, 1992

Description: Magnetic Resonance Imaging (MRI) was used to measure granular-flow in a partially filled, steadily rotating, long, horizontal cylinder. This non-invasive technique can yield statistically averaged two-dimensional concentrations and velocity profiles anywhere in the flow of suitable granular materials. First, rigid body motion of a cylinder fill with granular material was studied to confirm the validity of this method. Then, the density variation of the flowing layer where particles collide and … more
Date: January 20, 1993
Creator: Nakagawa, M.; Altobelli, S. A.; Caprihan, A.; Fukushima, E. & Jeong, E. K.
Partner: UNT Libraries Government Documents Department
open access

Assessment of nuclear safety and nuclear criticality potential in the Defense Waste Processing Facility. Revision 1

Description: The S-Area Defense Waste Processing Facility (DWPF) will initially process Batch 1 sludge in the sludge-only processing mode, with simulated non-radioactive Precipitate Hydrolysis, Aqueous (PHA) product, without the risk of nuclear criticality. The dilute concentration of fissile material in the sludge combined with excess of neutron absorbers during normal operations make criticality throughout the whole process incredible. Subsequent batches of the DWPF involving radioactive precipitate slurr… more
Date: July 20, 1993
Creator: Ha, B. C.
Partner: UNT Libraries Government Documents Department
open access

Math and Science School (MASS): A Department of Energy enhancement program to benefit students from Native American Tribes affected by the Hanford Reservation. Progress report

Description: Math and Science School is a program designed to enrich and encourage elementary students and teachers of the Confederated Tribes of the Umatilla Indian Reservation in the areas of mathematics and science activities. By providing access to special hands-on workshop sessions held in the mobile science laboratory at the school sites during the school year for students and teachers and with a separate summer inservice program for students, elementary children and teachers are encouraged to explore… more
Date: March 20, 1993
Creator: Jaeger, M.
Partner: UNT Libraries Government Documents Department
open access

Generalized energy principle for flute perturbations in axisymmetric mirror machines

Description: Axial symmetry is a very desirable property of the mirror devices both for fusion and neutron source applications. The main obstacle to be circumvented in the development of such systems, is the flute instability of axisymmetric mirrors. In recent years there appeared a number of proposals, devoted to the stabilization of the flute perturbations in the framework of axisymmetric magnetic configurations, which are based on the combining of the MHD unstable central cell with various types of end-c… more
Date: January 20, 1993
Creator: Lansky, I. M. & Ryutov, D. D.
Partner: UNT Libraries Government Documents Department
open access

Blind shaft drilling: The state of the art

Description: This report discusses the ``Art`` of blind shaft drilling which has been in a continual state of evolution at the Nevada Test Site (NTS) since the start of underground testing in 1957. Emplacement holes for nuclear devices are still being drilled by the rotary drilling process, but almost all the hardware and systems have undergone many changes during the intervening years. Blind shaft drilling and tunnel construction technologies received increased emphasis with the signing of the LTBT in 1963. more
Date: April 20, 1993
Creator: Rowe, P. A.
Partner: UNT Libraries Government Documents Department
open access

Fundamental mechanisms in flue gas conditioning. Quarterly report, January 1993--March 1993

Description: Our recent laboratory efforts were primarily directed toward the determination of the effects of adsorbed water on the tensile strength of powders and the development of apparatus for Experiment 3.5. As suggested by our literature review, our data indicate that water adsorption depends on particle morphology and on surface chemistry. Our measurements of tensile strength show that, for many of the samples we have analyzed, a relative minimum in tensile strength exists for samples conditioned and… more
Date: April 20, 1993
Creator: Snyder, T. R. & Vann Bush, P.
Partner: UNT Libraries Government Documents Department
open access

Development of a Coal Quality Expert. Final technical progress report No. 11, [October 1--December 31, 1992]

Description: Task 3 provides detailed characterization of fuel properties of the test coals and in-depth evaluation of their performance characteristics under controlled pilot-scale combustion testing. Results from this task provide fundamental information required to develop some of the improved algorithms for the CQE. Both bench-scale fuel characterization and test furnace performance evaluations are being performed under this task. All pilot-scale combustion tests under this task have been completed. Top… more
Date: May 20, 1993
Partner: UNT Libraries Government Documents Department
open access

Surfactant studies for bench-scale operation. Third quarterly technical progress report, January 1, 1993--March 31, 1993

Description: A phase 11 study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of, quantifying the enhancement in liquid yields and product quality. This report covers the third quarter of work. The major accomplishments were (1) completion of coal liquefaction autoclave reactor runs and related analysis with Illinois {number_sign}6 coal at a processing temperature of 375{degree}C, and pressures of 1800 and 1500 psig, (2) completion and analysis of two autoclave re… more
Date: April 20, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen