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388
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209
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156
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61
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Top quark physics at the D0 experiment
In this paper I present the latest results on top quark physics from the D0 collaboration since the discovery of the top quark in March 1995. I summarize the discovery results, discuss progress since the discovery, and show how we can measure the top quark mass using three separate techniques. The measurements were made at the Fermilab Tevatron, a p{bar p} collider with {radical}s = TeV, using {approximately}50 pb{sup {minus}1} data collected from 1992 to early 1995.
Date:
January 1, 1996
Creator:
Heinson, A.P.
Object Type:
Report
System:
The UNT Digital Library
Tracing early breccia pipe studies, Waste Isolation Pilot Plant, southeastern New Mexico: A study of the documentation available and decision-making during the early years of WIPP
Breccia pipes in southeastern New Mexico are local dissolution-collapse features that formed over the Capitan reef more than 500,000 years ago. During early site studies for the Waste Isolation Pilot Plant (WIPP), the threat to isolation by these features was undetermined. Geophysical techniques, drilling, and field mapping were used beginning in 1976 to study breccia pipes. None were found at the WIPP site, and they are considered unlikely to be a significant threat even if undetected. WIPP documents related to breccia pipe studies were assembled, inspected, and analyzed, partly to present a history of these studies. The main objective is to assess how well the record reflects the purposes, results, and conclusions of the studies from concept to decision-making. The main record source was the Sandia WIPP Central File (SWCF). Early records (about 1975 to 1977) are very limited, however, about details of objectives and plans predating any investigation. Drilling programs from about 1977 were covered by a broadly standardized statement of work, field operations plan, drilling history, and basic data report. Generally standardized procedures for peer, management, and quality assurance review were developed during this time. Agencies such as the USGS conducted projects according to internal standards. Records of …
Date:
January 1, 1996
Creator:
Power, D.W.
Object Type:
Report
System:
The UNT Digital Library
Transient studies of low temperature catalysts for methane conversion. Quarterly technical progress report, April 1, 1995--June 30, 1995
Previous results showed that a 3% Rh/TiO{sub 2} catalyst was active for the partial oxidation of methane to synthesis gas at temperatures significantly lower than those previously reported in the literature. Schmidt and coworkers have shown that Rh deposited on a monolith support operating at millisecond residence times exhibits high selectivity to CO and H{sub 2} and high methane conversion. The operation of the Rh monolith catalyst requires that ignition be carried out at high temperatures of about 600{degrees}C using ammonia oxidation to ignite the catalysts and avoid excursions into the explosive methane/oxygen mixtures. The 3% Rh/TiO{sub 2} catalyst ignites at much lower temperatures which permits the direct ignition of the methane oxygen mixture under safer conditions than reported by Schmidt and coworkers. In order to study the effect of the operation variables on the activity and selectivity of the 3% Rh/TiO{sub 2} catalysts we conducted steady state experiments at low conversion prior to ignition. Experiments were also conducted at high conversion after ignition.
Date:
January 1, 1996
Creator:
Wolf, E.E.
Object Type:
Report
System:
The UNT Digital Library
Transportation News, Volume 21, Number 5, January 1996
Newsletter published by the Texas Department of Transportation for TxDOT employees including information about the organization, projects throughout the state, and other topics related to transportation in Texas.
Date:
January 1996
Creator:
Texas. Department of Transportation.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Transportation requirements for the disposition of excess weapon plutonium by burning in fission reactors
Both the US and Russia are planning to dispose of about 50 Mg of excess weapon plutonium over a 25-year period. One option is to transfer the plutonium to Advanced Light Water (power) Reactors (ALWRs) for use as fuel. Subsequent disposal would then be considered commercial spent fuel. This disposition option, like others, involves the transportation of plutonium in various material forms as it proceeds through various points in the recovery operation. This paper examines both the disposition option and the issues surrounding the transportation of 50 Mg of excess plutonium within the US under current regulatory and infrastructure constraints. Transportation issues include criticality control, shielding, and containment of the contents. Allowable limits on each of these issues are specified by the applicable (or selected) regulation. The composition and form of the radioactive materials to be transported will determine, in part, the applicable portions of the regulations as well as the packaging design. The regulations and the packaging design, along with safeguard and security issues, will determine the quantity of plutonium or fuel assemblies per package as well as the number of packages per shipment and the type of highway carrier. For the disposition of 50 Mg of weapon plutonium …
Date:
January 1, 1996
Creator:
Hovingh, J. & Walter, C.E.
Object Type:
Article
System:
The UNT Digital Library
Travel-N-Texas Update, Number 16, January 1996
Newsletter of the Texas General Services Commission discussing news and activities of the organization as well as other information related to business travel for state employees.
Date:
January 1996
Creator:
Texas. General Services Commission. Travel Management Section.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
TRC Today, Volume 19, Number 1, January 1996
Newsletter of the Texas Rehabilitation Commission discussing information about the Commission as well as news, events, and other relevant information.
Date:
January 1996
Creator:
Texas Rehabilitation Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Tri-party agreement databases, access mechanism and procedures. Revision 2
This document contains the information required for the Washington State Department of Ecology (Ecology) and the U.S. Environmental Protection Agency (EPA) to access databases related to the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement). It identifies the procedure required to obtain access to the Hanford Site computer networks and the Tri-Party Agreement related databases. It addresses security requirements, access methods, database availability dates, database access procedures, and the minimum computer hardware and software configurations required to operate within the Hanford Site networks. This document supersedes any previous agreements including the Administrative Agreement to Provide Computer Access to U.S. Environmental Protection Agency (EPA) and the Administrative Agreement to Provide Computer Access to Washington State Department of Ecology (Ecology), agreements that were signed by the U.S. Department of Energy (DOE), Richland Operations Office (RL) in June 1990, Access approval to EPA and Ecology is extended by RL to include all Tri-Party Agreement relevant databases named in this document via the documented access method and date. Access to databases and systems not listed in this document will be granted as determined necessary and negotiated among Ecology, EPA, and RL through the Tri-Party Agreement Project Managers. The Tri-Party Agreement Project Managers are …
Date:
January 1, 1996
Creator:
Brulotte, P.J.
Object Type:
Report
System:
The UNT Digital Library
Tunable composite membranes for gas separations. Quarterly technical progress report, November 1, 1995--January 31, 1996
Research continued on composite membranes for gas separations. This report describes work in the following: instrument development; polymer synthesis; membrane fabrication; and permeability measurements.
Date:
January 1, 1996
Creator:
Ferraris, J.P.; Balkus, K.J. Jr. & Musselman, I.H.
Object Type:
Report
System:
The UNT Digital Library
Turning inspection regulations into training tools
In response to suggestions from internal and State of California auditors, the Hazardous Waste Management Division (HWM) at Lawrence Livermore National Laboratory prepared an Inspection Schedule and Guidance Document that summarizes the Laboratory`s inspection schedule and procedures for waste treatment, storage, and disposal facilities (TSDFs). Because it explains and comments in detail on the inspection schedule, forms, and procedures, this document is a centralized reference for HWM managers and personnel performing TSDF inspections at the Laboratory. It is also a training tool for experienced and new inspectors, standardizing the inspections of personnel with experience and explaining to novices what to look for and why. This poster presentation traces the team effort that created this document and provides specific examples of how the document was developed and how it is used.
Date:
January 1, 1996
Creator:
Finley, D. & Wheatcraft, D.
Object Type:
Article
System:
The UNT Digital Library
Two distinct phases of apoptosis in mammary gland involution: proteinase-independent and -dependent pathways
Postlactational involution of the mammary gland is characterized by two distinct physiological events: apoptosis of the secretory, epithelial cells undergoing programmed cell death, and proteolytic degradation of the mammary gland basement membrane. We examined the spatial and temporal patterns of apoptotic cells in relation to those of proteinases during involution of the BALB/c mouse mammary gland. Apoptosis was almost absent during lactation but became evident at day 2 of involution, when {beta}-casein gene expression was still high. Apoptotic cells were then seen at least up to day 8 of involution, when {beta}-casein gene expression was being extinguished. Expression of sulfated glycoprotein-2 (SGP-2), interleukin-1{beta} converting enzyme (ICE) and tissue inhibitor of metalloproteinases-1 was upregulated at day 2, when apoptotic cells were seen initially. Expression of the matrix metalloproteinases gelatinase A and stromelysin-1 and the serine proteinase urokinase-type plasminogen activator, which was low during lactation, was strongly upregulated in parallel starting at day 4 after weaning, coinciding with start of the collapse of the lobulo-alveolar structures and the intensive tissue remodeling in involution. The major sites of mRNA synthesis for these proteinases were fibroblast-like cells in the periductal stroma and stromal cells surrounding the collapsed alveoli, suggesting that the degradative phase of …
Date:
January 1, 1996
Creator:
Lund, Leif R; Romer, John; Thomasset, Nicole; Solberg, Helene; Pyke, Charles; Bissell, Mina J et al.
Object Type:
Article
System:
The UNT Digital Library
U.S. Bureau of Mines Final Report : Midnite Mine Water Treatment Studies
The U.S. Bureau of Mines reviewed and evaluated options for treatment of the approximately 500 million gallons of contaminated water in flooded pits at the Midnite Mine on the Spokane Indian Reservation. While current lime treatment produces discharge quality water, the resultant sludges are radioactive, presenting a disposal problem. Of the 24 commercial processes and seven emerging technologies evaluated, none demonstrated a significant advantage over ion exchange using a strong base anion exchange resin in either laboratory or field tests. Uranium was lowered from 22 ppm to 0.2 ppb in treated water. Radium was lowered from 44 pCi/L to <1 pCi/L using a modified precipitation with BaCl2 . The natural zeolite, clinoptilolite, lowered radium to 6-8 pCi/L when used as an ion exchanger.
Date:
1996
Creator:
Schultze, L. E.; Nilsen, D. N.; Isaacson, A. E. & Lahoda, E. J.
Object Type:
Report
System:
The UNT Digital Library
United States Reports, Volume 503: Cases Adjudged in The Supreme Court at October Term, 1991
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between February 25 and May 1, 1992. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1013.
Date:
1996
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Reports, Volume 504: Cases Adjudged in The Supreme Court at October Term, 1991
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between May 4 and June 17, 1992. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 995.
Date:
1996
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Reports, Volume 505: Cases Adjudged in The Supreme Court at October Term, 1991
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between June 18 and September 30, 1992. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1305.
Date:
1996
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Reports, Volume 506: Cases Adjudged in The Supreme Court at October Term, 1992
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between October 5, 1992, and February 19, 1993. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1303.
Date:
1996
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Reports, Volume 507: Cases Adjudged in The Supreme Court at October Term, 1992
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between February 22 and April 26, 1993. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1306.
Date:
1996
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Reports, Volume 508: Cases Adjudged in The Supreme Court at October Term, 1992
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between May 3 and June 14, 1993. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1305.
Date:
1996
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Statutes At Large, Volume 109, 1995
United States Statutes at Large include the text of various legislation passed by Congress such as private and public laws, concurrent resolutions, and Constitutional amendments as well as proclamations, changes to the structure of government departments, etc. Part One indexes start on page a1 after page 987. Part Two indexes start on page a1 after page 1780.
Date:
1996
Creator:
United States. Congress.
Object Type:
Legislative Document
System:
The UNT Digital Library
UniTree Name Server internals
The UniTree Name Server (UNS) is one of several servers which make up the UniTree storage system. The Name Server is responsible for mapping names to capabilities Names are generally human readable ASCII strings of any length. Capabilities are unique 256-bit identifiers that point to files, directories, or symbolic links. The Name Server implements a UNIX style hierarchical directory structure to facilitate name-to-capability mapping. The principal task of the Name Server is to manage the directories which make up the UniTree directory structure. The principle clients of the Name Server are the FTP Daemon, NFS and a few UniTree utility routines. However, the Name Server is a generalized server and will accept messages from any client. The purpose of this paper is to describe the internal workings of the UniTree Name Server. In cases where it seems appropriate, the motivation for a particular choice of algorithm as description of the algorithm itself will be given.
Date:
January 1, 1996
Creator:
Mecozzi, D. & Minton, J.
Object Type:
Report
System:
The UNT Digital Library
Update on slimhole drilling
Sandia National Laboratories manages the US Department of Energy program for slimhole drilling. The principal objective of this program is to expand proven geothermal reserves through increased exploration made possible by lower-cost slimhole drilling. For this to be a valid exploration method, however, it is necessary to demonstrate that slimholes yield enough data to evaluate a geothermal reservoir, and that is the focus of Sandia`s current research.
Date:
January 1, 1996
Creator:
Finger, J. T.
Object Type:
Article
System:
The UNT Digital Library
Update to modeling soil selenium concentrations in the shallow soil profile at Kesterson Reservoir Merced County, California
A mass balance model was developed to predict concentrations of water-extractable selenium in surface and subsurface soil by extrapolating the trend observed from 6 years of soil monitoring data collected at Kesterson Reservoir. Correlations between observed and calculated concentrations indicate that the major trends and year-to-year variations are well represented with the model. Results from this exercise were then used, under three climatic scenarios, to simulate the evolution of the soluble selenium inventory 25 years into the future. Based on these simulations, we expect that the availability of the soluble selenium inventory has most likely reached peak levels, and is now declining. However, year-to-year climatic variations may influence the rate of decline, and occasionally reverse this prevailing trend.
Date:
January 1, 1996
Creator:
Wahl, C. & Benson, S. M.
Object Type:
Report
System:
The UNT Digital Library
Uranium Provinces of North America: Their Definition, Distribution, and Models
This report follows the study of the plate tectonic history of North America and provides a model format of the uranium provinces of North America. The format is designed to provide the major characteristics of the province in brief concise descriptions.
Date:
1996
Creator:
Finch, Warren Irvin
Object Type:
Report
System:
The UNT Digital Library
US Department of Energy Office of Codes and Standards resource book
The US Department of Energy`s (DOE`s) Office of Codes and Standards has developed this Resource Book to provide a discussion of DOE involvement in building codes and standards; a current and accurate set of descriptions of residential, commercial, and Federal building codes and standards; information on State contacts, State code status, State building construction unit volume, and State needs; and a list of stockholders in the building energy codes and standards arena.
Date:
January 1, 1996
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library