20 Matching Results

Search Results

Results: 1 - 20
open access

Thermodynamics of lattice QCD with 2 quark flavours : chiral symmetry and topology.

Description: We have studied the restoration of chiral symmetry in lattice QCD at the finite temperature transition from hadronic matter to a quark-gluon plasma. By measuring the screening masses of flavour singlet and non-singlet meson excitations, we have seen evidence that, although flavour chiral symmetry is restored at this transition, flavour singlet (U(1)) axial symmetry is not. We conclude that this indicates that instantons continue to play an important role in the quark-gluon plasma phase.
Date: June 9, 1998
Creator: Lagae, J.-F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

QCD bound states and their response to extremes of temperature and density.

Description: We describe the application of Dyson-Schwinger equations to the calculation of hadron observable. The studies at zero temperature (T) and quark chemical potential ({mu}) provide a springboard for the extension to finite-(T, {mu}). Our exemplars highlight that much of hadronic physics can be understood as simply a manifestation of the nonperturbative, momentum-dependent dressing of the elementary Schwinger functions in QCD.
Date: June 9, 1998
Creator: Maris, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

D0 Superconducting Solenoid Quench Data and Slow Dump Data Acquisition

Description: This Dzero Engineering note describes the method for which the 2 Tesla Superconducting Solenoid Fast Dump and Slow Dump data are accumulated, tracked and stored. The 2 Tesla Solenoid has eleven data points that need to be tracked and then stored when a fast dump or a slow dump occur. The TI555(Texas Instruments) PLC(Programmable Logic Controller) which controls the DC power circuit that powers the Solenoid, also has access to all the voltage taps and other equipment in the circuit. The TI555 co… more
Date: June 9, 1998
Creator: Markley, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Love Field]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: June 9, 1998, 5:00 p.m.
Duration: 1 minute 47 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Cluster ion beam polishing for inertial confinement fusion target capsules

Description: Targets for Inertial Confinement Fusion (ICF) typically consist of a hollow, spherical capsule filled with a mixture of hydrogen isotopes. Typically, these capsules are irradiated by short, intense pulses of either laser light (``direct drive``) or laser-generated. x-rays (``indirect drive``), causing them to implode This compresses and heats the fuel, leading to thermonuclear fusion. This process is highly sensitive to hydrodynamic (e.g., Rayleigh-Taylor) instabilities, which can be initiated … more
Date: June 9, 1998
Creator: McEachern, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Characterization and Evaluation of Coal Liquefaction Process Streams

Description: CONSOL characterized 38 process strea m samples from HTI Run PB- 04, in which Black Thunder Mine Coal, Hondo vacuum resid, autom obile shredder residue (ASR), and virgin plastics were used as liquefaction feedstocks with dispersed catalyst. A paper on kinetic modeling of resid reactivity was presented at the DOE Coal Lique -faction and Solid Fuels Contractors Review Conference, September 3- 4, 1997, i n Pittsburgh, PA. The paper, "The Reactivity of Direct Coal Liquefaction Resids", i s appended… more
Date: June 9, 1998
Creator: Robbins, G. A.; Winschel, R. A. & Brandes, S. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ceramic component development analysis -- Volume 1. Final report

Description: The development of advanced filtration media for advanced fossil-fueled power generating systems is a critical step in meeting the performance and emissions requirements for these systems. While porous metal and ceramic candle-filters have been available for some time, the next generation of filters will include ceramic-matrix composites (CMCs) (Techniweave/Westinghouse, Babcock and Wilcox (B and W), DuPont Lanxide Composites), intermetallic alloys (Pall Corporation), and alternate filter geome… more
Date: June 9, 1998
Creator: Boss, D. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Strength testing of hot gas filters: Volume 6. Final report

Description: The strength of various ceramic hot gas filter materials has been evaluated by four laboratories: Argonne National Laboratory, DuPont Lanxide, Southern Research Institute and Babcock and Wilcox. The filter materials under study include (a) a Nextel{trademark}/SiC composite filter (from 3M), (b) PRD-66, an all oxide layered microstructure of alumina, mullite, cordierite and some amorphous material by DuPont Lanxide, (c) a Babcock and Wilcox material consisting of an oxide composite of chopped fi… more
Date: June 9, 1998
Creator: Faber, K.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design process for NIF laser alignment and beam diagnostics

Description: In a controller for an adaptive optic system designed to correct phase aberrations in a high power laser, the wavefront sensor is a discrete Hartmann-Shack design. It uses an army of lenslets (like a fly` s eye) to focus the laser into 77 spots on a CCD camera. Average local tilt of the wavefront across each lenslet changes the position of its focal spot. The system requires 0.1 pixel accuracy in determining the focal spot location. We determine a small area around each spot` s previous locatio… more
Date: June 9, 1998
Creator: Grey, A., LLNL
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Regional Coordination and Analysis of OCRWM Transportation Program: Fourth Quarter and Final Report, April 15, 1997 - April 14, 1998

Description: This is the fourth quarter report on the activities of the High-Level Radioactive Waste Committee of the Western Interstate Energy Board. Together with the first three quarterly reports, this constitutes a final report. Over the course of the year, work under this contract has focused on: 1. Efforts to improved the Department's proposal to implement Section 180(c) of the Nuclear Waste Policy Act. (DOE has since suspended its efforts to implement this provision of the law.); 2. Advice to DOB on … more
Date: June 9, 1998
Creator: Board, Western Interstate Energy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The DNA Files

Description: The DNA Files is a radio documentary which disseminates genetics information over public radio. The documentaries explore subjects which include the following: How genetics affects society. How human life began and how it evolved. Could new prenatal genetic tests hold the key to disease prevention later in life? Would a national genetic data base sacrifice individual privacy? and Should genes that may lead to the cure for cancer be privately owned? This report serves as a project update for the… more
Date: June 9, 1998
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application experiences with the Globus toolkit.

Description: The Globus grid toolkit is a collection of software components designed to support the development of applications for high-performance distributed computing environments, or ''computational grids'' [14]. The Globus toolkit is an implementation of a ''bag of services'' architecture, which provides application and tool developers not with a monolithic system but rather with a set of stand-alone services. Each Globus component provides a basic service, such as authentication, resource allocation,… more
Date: June 9, 1998
Creator: Brunett, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A fault detection service for wide area distributed computations.

Description: The potential for faults in distributed computing systems is a significant complicating factor for application developers. While a variety of techniques exist for detecting and correcting faults, the implementation of these techniques in a particular context can be difficult. Hence, we propose a fault detection service designed to be incorporated, in a modular fashion, into distributed computing systems, tools, or applications. This service uses well-known techniques based on unreliable fault d… more
Date: June 9, 1998
Creator: Stelling, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Interfacial coatings for ceramic-matrix composites -- Volume 2. Final report

Description: This report summarizes the task conducted to examine various activities on interface development for ceramic-matrix composites (CMCs) intended for high-temperature applications. While several articles have been published on the subject of CMC interfaces, the purpose of this report is to describe the various ongoing efforts on interface concepts, material selection, and issues related to processing methods employed for developing interface coatings. The most exciting and new development in the f… more
Date: June 9, 1998
Creator: Sambasivan, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen