Resource Type
Serial/Series Title
Fiscal Year 1999
9
Restoring Sustainable Forests on Appalachian Mined Lands for Wood Products, Renewable Energy, Carbon Sequestration, and Other Ecosystems Services Quarterly Report
8
Fiscal Year 1998
5
Fiscal Year 2007
5
Brookhaven National Laboratory Annual Report
4
FEM3A Model Development Quarterly Report
4
Fiscal Year 2003
4
Fiscal Year 2006
4
Fiscal Year 2008
4
24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Report
3
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4,316 Matching Results
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Development of the chemical and electrochemical coal cleaning process
The objectives of this effort are (a) to learn the mechanisms by which the Chemical and Electrochemical Coal Cleaning (CECC) process removes pyritic sulfur and ash from coal, (b) to learn more about the operating parameters of the process, (c) to collect engineering information for scale-up of the process, and (d) to test the CECC process on a bench-scale continuous operation.
Date:
January 1, 1988
Creator:
Yoon, R. H.
System:
The UNT Digital Library
BTA Magnet Field Map Archive and MAD Model
This note publishes some and information that has resided in private files. The attached tables were provided by Joseph Skelly from his archives. They show magnetic field measurements versus excitation current for the Booster to AGS transfer line quadrupoles and dipoles based on field measurements [we believe] were done by the Magnet Division. Also given are Ed Blesser's fifth order fits of field versus current. The results are given in 'Tesla' or T-M/M. These tables are attached to provide an archive of this data. The MAD model of the BTA line does have the same values as shown in the attached fits so the transfer was correct. MAD uses as its 'gradient' for quads Tesla per meter normalized to rigidity [B-rho]. The model of the BTA line in use uses the T-M/M given in the tables divided by the length to give T M which is then normalized by Brho. Thus, the input to the model appears to be correct. The original model is also attached as part of a memo by Skelly describing it.
Date:
April 1, 2008
Creator:
Glenn,J.W.
System:
The UNT Digital Library
Effects of recent measurements on phase shift analysis of nucleon--nucleon scattering. [Below 250 MeV]
Four recent measurements in pp and np scattering below 250 MeV are used to indicate the substantial influence that new experiments can have upon phase parameters derived from the expanded data base. The cases are described separately, and the collective effect upon energy dependent analyses is discussed. It is indicated that the types of change are far from negligible. 7 refs. (JFP)
Date:
January 1, 1977
Creator:
Arndt, R.
System:
The UNT Digital Library
Magnetic monopoles: a status report
A solitary, uncorroborated Stanford candidate event is the only evidence that magnetic monpoles derives from Dirac's assertion that monopoles could explain charge quantization and the 't Hooft-Polyakov demonstration that monopoles are an inevitable consequence of many gauge theories currently being used to unify the electroweak (photon-lepton) and nuclear (quark) interactions. The monopole abundance implied by the Stanford event is in clear contradiction to bounds on their number from astronomical data. Fortunately, the already considerable and expanding arsenal of detection techniques are being fashioned to experimentally test the many open questions surrounding monopoles.
Date:
March 1, 1983
Creator:
Carrigan, R. A., Jr. & Trower, W. P.
System:
The UNT Digital Library
Purple Level - 1 Milestone Review Committee I/O and Archive Follow-up Demonstration
On July 7th 2006, the Purple Level-1 Review Committee convened and was presented with evidence of the completion of Level-2 Milestone 461 (Deploy First Phase of I/O Infrastructure for Purple) which was performed in direct support of the Purple Level-1 milestone. This evidence included a short presentation and the formal documentation of milestone No.461 (see UCRL-TR-217288). Following the meeting, the Committee asked for the following additional evidence: (1) Set a speed measurement/goal/target assuming a number of files that the user needs to get into the archives. Then redo the benchmark using whatever tool(s) the labs prefer (HTAR, for example). Document how long the process takes. (2) Develop a test to read files back to confirm that what the user gets out of the archive is what the user put into the archive. This evidence has been collected and is presented here.
Date:
December 5, 2006
Creator:
Gary, M R
System:
The UNT Digital Library
CROSSCUTTING TECHNOLOGY DEVELOPMENT AT THE CENTER FOR ADVANCED SEPARATION TECHNOLOGIES
The U.S. is the largest producer of mining products in the world. In 2003, U.S. mining operations produced $57 billion worth of raw materials that contributed a total of $564 billion to the nation's wealth. Despite these contributions, the mining industry has not been well supported with research and development funds as compared to mining industries in other countries. To overcome this problem, the Center for Advanced Separation Technologies (CAST) was established to develop technologies that can be used by the U.S. mining industry to create new products, reduce production costs, and meet environmental regulations. Much of the research to be conducted with Cooperative Agreement funds will be longer-term, high-risk, basic research and will be carried out in five broad areas: (1) Solid-solid separation; (2) Solid-liquid separation; (3) Chemical/Biological Extraction; (4) Modeling and Control; and (5) Environmental Control.
Date:
January 20, 2005
Creator:
Hull, Christopher E.
System:
The UNT Digital Library
Restoring Sustainable Forests on Appalachian Mined Lands for Wood Products, Renewable Energy, Carbon Sequestration, and Other Ecosystems Services Quarterly Report
This is the first quarterly Technical Report for the period October-December, 2003. A kick-off meeting was held with NETL administrators and scientists at Morgantown, WV, on December 2, 2002. The purpose of this project is to evaluate the biological and economic feasibility of restoring high-quality forests on mined land, and to measure carbon sequestration and wood production benefits that would be achieved from forest restoration procedures. During this first quarterly reporting period, five Graduate Research Assistants were recruited, an MOA was drafted between Virginia Tech and three industry cooperators, preliminary field locations for controlled studies were located, and a preliminary analysis of a carbon inventory of forest sites on mined land was made.
Date:
February 4, 2002
Creator:
Burger, James A. (info: Dr.)
System:
The UNT Digital Library
Heteroatom speciation in coal liquefaction via FTIR coupled with liquid chromatography. Quarterly progress report, October 1-December 31, 1983
The objectives of the research are (1) evaluate the potential of FT-IR for qualitative functional group detection in chromatographic fractions of highly polar materials, (2) develop separation techniques with the aid of FT-IR detection for concentration of oxygen, nitrogen and sulfur functionalities in synfuels, (3) describe and quantify the various heteroatom functionalities in selected solvent refined coal fractions, (4) place speciation techniques on-line with chromatographic separations, (5) compare quantitative speciation information obtained from LC-FTIR with established fluorine tagging techniques regarding model compounds and synfuels. 23 figures, 5 tables.
Date:
May 1, 1984
Creator:
Taylor, L.T.
System:
The UNT Digital Library
Development and application of analytical techniques to chemistry of donor solvent liquefaction. Final report, August 31, 1977-December 31, 1979
The scope of this project was to develop and apply analytical techniques for the characterization of coal conversion products. Solvent-refined coal served as the coal-derived material for the duration of the study. The investigation has focused primarily in the areas of separations and nuclear magnetic resonance spectroscopy. Highlights of the twenty-eight month study are listed and followed by a brief synopsis of the major findings.
Date:
January 1, 1979
Creator:
Squires, A. M.; Dorn, H. C.; Taylor, L. T.; Dillard, J. G. & Rony, P. R.
System:
The UNT Digital Library
Low-pressure appraoch to the formation and study of exciplex systems. [VPI and SU, Blacksburg, Virginia]
Studies on the formation and properties of new materials for high-energy, gas-phase lasers are described. Attention is directed mainly to systems having bound excited states but unbound ground states. An important class of such excimer/exciplex systems has a van der Waals dimer/oligomer as its ground state. This research attempts to probe the relative rates of electron pumping of excited-state manifolds and the preferentially pumped vibronic states within each manifold. Reactive quenching of emission, resonant self-absorption of laser emissions, and collision- and noncollision-induced intersystem crossing are also considered. 11 figures, 2 tables. (RWR)
Date:
November 1, 1977
Creator:
Sanzone, G.
System:
The UNT Digital Library
Microgas dispersion for fine-coal cleaning. Technical progress report, September 1, 1980-February 28, 1981
The purpose of this project is to develop a method of cleaning fine coal by flotation using very small microbubbles now known as Colloidal Gas Aphrons (CGA) and previously known as Microgas Dispersions (MGD). It was thought that MGD was not sufficiently descriptive of the nature of the small bubbles, and hence, the change was made. The objectives of the past six months of investigation were as follows: (1) a fundamental study of the properties of CGA, which involved (i) a study of the stability of the bubbles generated with several frothers that are currently used in the mineral industry, (ii) a study of the charge on the bubbles, and (iii) a microscopic inspection of the bubbles during flotation; (2) a preliminary investigation of the flotation characteristics of coal; and (3) construction of an automatic batch flotation machine, similar to the one described by Miller (1980).
Date:
January 1, 1980
Creator:
Yoon, R. H. & Sebba, F.
System:
The UNT Digital Library
Control of pyrite surface chemistry in physical coal cleaning. Second quarterly progress report, December 1, 1989--February 28, 1990
To better understand the surface chemical properties of coal and mineral pyrite, studies on the effect of flotation surfactants (frother and kerosene) on the degree of hydrophobicity have been conducted. The presence of either frother or kerosene enhanced the flotability of coal and mineral pyrite with a corresponding decrease in induction time over the pH range examined. Scanning electron microscopy (SEM) results indicate a correlation exists between the sample surface morphology and crystal structure and the observed hydrophobicity. As a result of the data obtained from the surface characterization studies, controlled surface oxidation was investigated as a possible pyrite rejection scheme in microbubble column flotation.
Date:
June 24, 1992
Creator:
Luttrell, G. H.; Yoon, R. H.; Zachwieja, J. & Lagno, M.
System:
The UNT Digital Library
Advanced Dewatering Systems Development
A new fine coal dewatering technology has been developed and tested in the present work. The work was funded by the Solid Fuels and Feedstocks Grand Challenge PRDA. The objective of this program was to 'develop innovative technical approaches to ensure a continued supply of environmentally sound solid fuels for existing and future combustion systems with minimal incremental fuel cost.' Specifically, this solicitation is aimed at developing technologies that can (i) improve the efficiency or economics of the recovery of carbon when beneficiating fine coal from both current production and existing coal slurry impoundments and (ii) assist in the greater utilization of coal fines by improving the handling characteristics of fine coal via dewatering and/or reconstitution. The results of the test work conducted during Phase I of the current project demonstrated that the new dewatering technologies can substantially reduce the moisture from fine coal, while the test work conducted during Phase II successfully demonstrated the commercial viability of this technology. It is believed that availability of such efficient and affordable dewatering technology is essential to meeting the DOE's objectives.
Date:
July 31, 2008
Creator:
Yoon, R. H. & Luttrell, G. H.
System:
The UNT Digital Library
A Soft-Switching Inverter for High-Temperature Advanced Hybrid Electric Vehicle Traction Motor Drives
The state-of-the-art hybrid electric vehicles (HEVs) require the inverter cooling system to have a separate loop to avoid power semiconductor junction over temperatures because the engine coolant temperature of 105�C does not allow for much temperature rise in silicon devices. The proposed work is to develop an advanced soft-switching inverter that will eliminate the device switching loss and cut down the power loss so that the inverter can operate at high-temperature conditions while operating at high switching frequencies with small current ripple in low inductance based permanent magnet motors. The proposed tasks also include high-temperature packaging and thermal modeling and simulation to ensure the packaged module can operate at the desired temperature. The developed module will be integrated with the motor and vehicle controller for dynamometer and in-vehicle testing to prove its superiority. This report will describe the detailed technical design of the soft-switching inverters and their test results. The experiments were conducted both in module level for the module conduction and switching characteristics and in inverter level for its efficiency under inductive and dynamometer load conditions. The performance will be compared with the DOE original specification.
Date:
January 31, 2012
Creator:
unknown
System:
The UNT Digital Library
An advanced control system for fine coal flotation. Fifth quarterly technical progress report, October 1, 1996--December 31, 1996
A model-based flotation control scheme is being implemented to achieve optimal performance in the handling and treatment of fine coal. The control scheme monitors flotation performance through on- line analysis of ash content. Then, based on the economic and metallurgical performance of the circuit, variables such as reagent dosage, pulp density and pulp level are adjusted using model-base control algorithms to compensate for feed variations and other process disturbances. Recent developments in sensor technology are being applied for on-line determination of slurry ash content. During the fifth quarter of this project, all work was on hold pending the final novation of the contract to Virginia Polytechnic Institute and State University.
Date:
March 4, 1997
Creator:
Adel, G. T. & Luttrell, G. H.
System:
The UNT Digital Library
Annual Hanford seismic report -- fiscal year 1996
Seismic monitoring (SM) at the Hanford Site was established in 1969 by the US Geological Survey (USGS) under a contract with the US Atomic Energy Commission. Since 1980, the program has been managed by several contractors under the US Department of Energy (USDOE). Effective October 1, 1996, the Seismic Monitoring workscope, personnel, and associated contracts were transferred to the USDOE Pacific Northwest National Laboratory (PNNL). SM is tasked to provide an uninterrupted collection and archives of high-quality raw and processed seismic data from the Hanford Seismic Network (HSN) located on and encircling the Hanford Site. SM is also tasked to locate and identify sources of seismic activity and monitor changes in the historical pattern of seismic activity at the Hanford Site. The data compiled are used by SM, Waste Management, and engineering activities at the Hanford Site to evaluate seismic hazards and seismic design for the Site.
Date:
December 1, 1996
Creator:
Hartshorn, D. C. & Reidel, S. P.
System:
The UNT Digital Library
Savannah River Site Waste Isolation Pilot Plant Disposal Program - Acceptable Knowledge Summary Report for Waste Stream: SR-T001-221-HET
This document, along with referenced supporting documents provides a defensible and auditable record of acceptable knowledge for one of the waste streams from the FB-Line. This heterogeneous debris transuranic waste stream was generated after January 25, 1990 and before March 20, 1997. The waste was packaged in 55-gallon drums, then shipped to the transuranic waste storage facility in ''E'' area of the Savannah River Site. This acceptable knowledge report includes information relating to the facility's history, configuration, equipment, process operations and waste management practices. Information contained in this report was obtained from numerous sources including: facility safety basis documentation, historical document archives, generator and storage facility waste records and documents, and interviews with cognizant personnel.
Date:
January 24, 2001
Creator:
Lunsford, G.F.
System:
The UNT Digital Library
The Virtual Library in Action
The SLAC Library has for many years provided SPIRES-HEP, a 300,000 record bibliographic database, to the world particle physics community via the Internet as well as through clone sites in Europe and Japan. The 1991 introduction of the e-print archives at LANL coupled with the World-Wide-Web (WWW) from CERN suddenly made it possible to provide easy linkage between bibliographic database records and the actual full-text of papers. The SLAC Library has turned this possibility into reality by converting hundreds of TeX source documents each month into viewable postscript complete with figures. These (now more than 20,000) postscript files are linked to the HEP database, and the full-text is rendered universally visible via WWW. We discuss the project, the collaboration of physicists and librarians, what is easy, what is hard, and our vision for the future.
Date:
July 2, 1999
Creator:
Addis, Louise
System:
The UNT Digital Library
Development of the chemical and electrochemical coal cleaning process
Liberation studies on the Elkhorn No. 3 coal were completed in this quarter. The results obtained from the 65 {times} 150 mesh samples showed that the amount of mineral matter and pyrite liberated by the Chemical and Electrochemical Coal Cleaning (CECC) process increases with time. The free mineral matter undergoes some reduction in size during the CECC treatment and the majority of the liberated mineral particles in this sample are finer than 150 mesh. This is opposite that found for the Pittsburgh No. 8 coal, which may explain the better response of the Elkhorn No. 3 coal to CECC treatment. The continuous bench-scale unit was modified during the quarter to satisfy the health and safety requirements of the university. The unit was modified to ensure that any spill or leakage can be contained. Due to these modifications, continuous testing work was delayed.
Date:
January 1, 1991
Creator:
Basilio, C.I. & Yoon, Roe-Hoan.
System:
The UNT Digital Library
Yucca Mountain licensing support network archive assistant.
This report describes the Licensing Support Network (LSN) Assistant--a set of tools for categorizing e-mail messages and documents, and investigating and correcting existing archives of categorized e-mail messages and documents. The two main tools in the LSN Assistant are the LSN Archive Assistant (LSNAA) tool for recategorizing manually labeled e-mail messages and documents and the LSN Realtime Assistant (LSNRA) tool for categorizing new e-mail messages and documents. This report focuses on the LSNAA tool. There are two main components of the LSNAA tool. The first is the Sandia Categorization Framework, which is responsible for providing categorizations for documents in an archive and storing them in an appropriate Categorization Database. The second is the actual user interface, which primarily interacts with the Categorization Database, providing a way for finding and correcting categorizations errors in the database. A procedure for applying the LSNAA tool and an example use case of the LSNAA tool applied to a set of e-mail messages are provided. Performance results of the categorization model designed for this example use case are presented.
Date:
March 1, 2008
Creator:
Dunlavy, Daniel M.; Bauer, Travis L.; Verzi, Stephen J.; Basilico, Justin Derrick & Shaneyfelt, Wendy
System:
The UNT Digital Library
(Theory of weak interactions and related topics; and study of e sup + e sup minus interactions)
This report contains brief discussions on the following topics: Higher point anomalous amplitudes; topological phase of quantum gravity; chiral symmetry breaking at finite temperature; Skyrmions as representations of current algebras; D {ge} 4 critical phenomena: self-duality, infinite dimensional symmetries and hypercomplex analyticity; D {ge} 3 topological field theories: anionic membranes and division algebras, geometric quantization by the method of orbits; and novel non-perturbative approaches. (LSP)
Date:
January 1, 1990
Creator:
Chang, Lay Nam & Tze, C.H.
System:
The UNT Digital Library
Partial-wave analyses of hadron scattering below 2 GeV. Progress report May 1991--April 30, 1992
The Center for Analysis of Particle Scattering (CAPS) in the Department of Physics at Virginia Polytechnic Institute and State University has analyzed basic two-body hadron reactions below 2 GeV for the last two decades. Reactions studied were nucleon-nucleon, pion-nucleon, K{sup +}-nucleon and pion photoproduction systems. In addition to analyses of these systems, a computer graphics system (SAID) has been developed and disseminated to over 250 research institutions using VAX computers. The computer-interactive system for disseminating information on basic scattering reactions is also accessible to the physics community through TELNET on the VPI&SU physics department VAX. 6 refs.
Date:
December 31, 1991
Creator:
Arndt, Richard A. & Roper, L. David
System:
The UNT Digital Library
Control of pyrite surface chemistry in physical coal cleaning. Seventh quarterly progress report, March 1, 1991--May 31, 1991
The removal of pyrite from coal by flotation or any other surface chemistry based separation process is often hampered by the apparent hydrophobicity of the mineral. Results obtained in this project suggest that corrosion processes are responsible for the apparent hydrophobicity of pyrite in aqueous environments. Characterization of the corrosion products of pyrite in acidic and alkaline solution has been performed using electrochemical (cyclic voltammetry and single-potential-step chronoamperometry) and spectroscopic techniques (X-ray photoelectron spectroscopy -- XPS). The nature of the surface products have been correlated with hydrophobicity determined from in-situ contact angle measurements. The results show that pyrite hydrophobicity is influenced by either the oxidation or reduction conditions of the system.
Date:
June 24, 1992
Creator:
Luttrell, G. H.; Yoon, R. H. & Zachwieja, J. B.
System:
The UNT Digital Library
Development of the chemical and electrochemical coal cleaning process. Technical progress report, July 1, 1991--September 30, 1991
Liberation studies on the Elkhorn No. 3 coal were completed in this quarter. The results obtained from the 65 {times} 150 mesh samples showed that the amount of mineral matter and pyrite liberated by the Chemical and Electrochemical Coal Cleaning (CECC) process increases with time. The free mineral matter undergoes some reduction in size during the CECC treatment and the majority of the liberated mineral particles in this sample are finer than 150 mesh. This is opposite that found for the Pittsburgh No. 8 coal, which may explain the better response of the Elkhorn No. 3 coal to CECC treatment. The continuous bench-scale unit was modified during the quarter to satisfy the health and safety requirements of the university. The unit was modified to ensure that any spill or leakage can be contained. Due to these modifications, continuous testing work was delayed.
Date:
December 31, 1991
Creator:
Basilio, C. I. & Yoon, Roe-Hoan
System:
The UNT Digital Library