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Parallelization of an unstructured grid, hydrodynamic-diffusion code (open access)

Parallelization of an unstructured grid, hydrodynamic-diffusion code

We describe the parallelization of a three dimensional, un structured grid, finite element code which solves hyperbolic conservation laws for mass, momentum, and energy, and diffusion equations modeling heat conduction and radiation transport. Explicit temporal differencing advances the cell-based gasdynamic equations. Diffusion equations use fully implicit differencing of nodal variables which leads to large, sparse, symmetric, and positive definite matrices. Because of the unstructured grid, the off-diagonal non-zero elements appear in unpredictable locations. The linear systems are solved using parallelized conjugate gradients. The code is parailelized by domain decomposition of physical space into disjoint subdomains (SDS). Each processor receives its own SD plus a border of ghost cells. Results are presented on a problem coupling hydrodynamics to non-linear heat cond
Date: May 20, 1998
Creator: Milovich, J L & Shestakov, A
Object Type: Article
System: The UNT Digital Library
Hanford facility dangerous waste Part A, Form 3 and Part B permit application documentation, Central Waste Complex (WA7890008967)(TSD: TS-2-4) (open access)

Hanford facility dangerous waste Part A, Form 3 and Part B permit application documentation, Central Waste Complex (WA7890008967)(TSD: TS-2-4)

The Hanford Facility Dangerous Waste Permit Application is considered to be a single application organized into a General Information Portion (document number DOE/RL-91-28) and a Unit-Specific Portion. The scope of the Unit-Specific Portion is limited to Part B permit application documentation submitted for individual, operating, treatment, storage, and/or disposal units, such as the Central Waste Complex (this document, DOE/RL-91-17). Both the General Information and Unit-Specific portions of the Hanford Facility Dangerous Waste Permit Application address the content of the Part B permit application guidance prepared by the Washington State Department of Ecology (Ecology 1996) and the U.S. Environmental Protection Agency (40 Code of Federal Regulations 270), with additional information needed by the Hazardous and Solid Waste Amendments and revisions of Washington Administrative Code 173-303. For ease of reference, the Washington State Department of Ecology alpha-numeric section identifiers from the permit application guidance documentation (Ecology 1996) follow, in brackets, the chapter headings and subheadings. A checklist indicating where information is contained in the Central Waste Complex permit application documentation, in relation to the Washington State Department of Ecology guidance, is located in the Contents section. Documentation contained in the General Information Portion is broader in nature and could be used by …
Date: May 20, 1998
Creator: Saueressig, D.G.
Object Type: Report
System: The UNT Digital Library
Metallic uranium ZPPR fuel : corrosion characteristics and corrosion product oxidation kinetics. (open access)

Metallic uranium ZPPR fuel : corrosion characteristics and corrosion product oxidation kinetics.

None
Date: May 20, 1998
Creator: Totemeier, T. C.; Pahl, R. G.; Hayes, S. L. & Frank, S. M.
Object Type: Report
System: The UNT Digital Library
Models of Superoxide Dismutases (open access)

Models of Superoxide Dismutases

In this review we have focused much of our discussion on the mechanistic details of how the native enzymes function and how mechanistic developments/insights with synthetic small molecule complexes possessing SOD activity have influenced our understanding of the electron transfer processes involved with the natural enzymes. A few overriding themes have emerged. Clearly, the SOD enzymes operate at near diffusion controlled rates and to achieve such catalytic turnover activity, several important physical principles must be operative. Such fast electron transfer processes requires a role for protons; i.e., proton-coupled electron transfer (''H-atom transfer'') solves the dilemma of charge separation developing in the transition state for the electron transfer step. Additionally, outer-sphere electron transfer is likely a most important pathway for manganese and iron dismutases. This situation arises because the ligand exchange rates on these two ions in water never exceed {approx}10{sup +7} s{sup -1}; consequently, 10{sup +9} catalytic rates require more subtle mechanistic insights. In contrast, copper complexes can achieve diffusion controlled (>10{sup +9}) exchange rates in water; thus inner-sphere electron transfer processes are more likely to be operative in the Cu/Zn enzymes. Recent studies have continued to expand our understanding of the mechanism of action of this most important class …
Date: May 20, 1998
Creator: Cabelli, Diane E.; Riley, Dennis; Rodriguez, Jorge A.; Valentine, Joan Selverstone & Zhu, Haining
Object Type: Book
System: The UNT Digital Library
LASNEX modeling of target expansion in the ETA-II experiment (open access)

LASNEX modeling of target expansion in the ETA-II experiment

We have used the hydrodynamics code LASNEX to model the hydro-expansion of the tantalum target for the ETA-II experiment. The electron beam has kinetic energy of 6 MeV and has a total energy ranges from 720 to 1440 J. The electron beam profile resembles that of a Bennett pinch. The radius for the full-width-at-half-maximum ranges from 1 to 3 mm. For all these parameters, simulations show that the electron beam is able to ablate the central portion of the target. The expansion velocity of the target ranges from about 10� to 5 x 105 cm/s. The target is hot enough so that the surrounding low-density air is ionized and is expanding at a considerably higher velocity than the target itself. Therefore, care must be taken during the experiment to ensure that the measurement is for the tantalum and not for the ionized air.
Date: May 20, 1998
Creator: Ho, D D-M
Object Type: Report
System: The UNT Digital Library
Věstník (Temple, Tex.), Vol. 86, No. 20, Ed. 1 Wednesday, May 20, 1998 (open access)

Věstník (Temple, Tex.), Vol. 86, No. 20, Ed. 1 Wednesday, May 20, 1998

Weekly Czech and English language newspaper from Temple, Texas published as the official organ of the Slavonic Benevolent Order of the State of Texas that includes news of interest to members along with advertising.
Date: May 20, 1998
Creator: Vanicek, Brian
Object Type: Newspaper
System: The Portal to Texas History
The Penny Record (Bridge City, Tex.), Vol. 40, No. 3, Ed. 1 Wednesday, May 20, 1998 (open access)

The Penny Record (Bridge City, Tex.), Vol. 40, No. 3, Ed. 1 Wednesday, May 20, 1998

Weekly newspaper from Bridge City, Texas that includes local, state, and national news along with advertising.
Date: May 20, 1998
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Illustrated Paperboy (Cleveland, Tex.), Vol. 6, No. 8, Ed. 1 Wednesday, May 20, 1998 (open access)

Illustrated Paperboy (Cleveland, Tex.), Vol. 6, No. 8, Ed. 1 Wednesday, May 20, 1998

Weekly newspaper from Cleveland, Texas that includes local, county, and state news along with extensive advertising.
Date: May 20, 1998
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 20, No. 15, Ed. 1 Wednesday, May 20, 1998 (open access)

Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 20, No. 15, Ed. 1 Wednesday, May 20, 1998

Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date: May 20, 1998
Creator: Rigg, John
Object Type: Newspaper
System: The Portal to Texas History
The Panola Watchman (Carthage, Tex.), Vol. 125, No. 42, Ed. 1 Wednesday, May 20, 1998 (open access)

The Panola Watchman (Carthage, Tex.), Vol. 125, No. 42, Ed. 1 Wednesday, May 20, 1998

Semiweekly newspaper from Carthage, Texas that includes local, state, and national news along with advertising.
Date: May 20, 1998
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
The Wylie News (Wylie, Tex.), Vol. 51, No. 51, Ed. 1 Wednesday, May 20, 1998 (open access)

The Wylie News (Wylie, Tex.), Vol. 51, No. 51, Ed. 1 Wednesday, May 20, 1998

Weekly newspaper from Wylie, Texas that includes local, state and national news along with advertising.
Date: May 20, 1998
Creator: Engbrock, Chad B.
Object Type: Newspaper
System: The Portal to Texas History
DART steps up transit security (open access)

DART steps up transit security

News release about DART's planned improvements to transit safety following an altercation aboard a train with no transit police on-board.
Date: May 20, 1998
Creator: Lyons, Morgan & Stringfellow, Robin
Object Type: Text
System: The Portal to Texas History
Mannford Eagle (Mannford, Okla.), Vol. 17, No. 12, Ed. 1 Wednesday, May 20, 1998 (open access)

Mannford Eagle (Mannford, Okla.), Vol. 17, No. 12, Ed. 1 Wednesday, May 20, 1998

Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1998
Creator: Retherford, Bill R.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Uniform Standards in Private Securities Litigation: Limitations on Shareholder Lawsuits (open access)

Uniform Standards in Private Securities Litigation: Limitations on Shareholder Lawsuits

None
Date: May 20, 1998
Creator: Seitzinger, Michael V.
Object Type: Report
System: The UNT Digital Library
Crime Control Assistance Through the Byrne Programs (open access)

Crime Control Assistance Through the Byrne Programs

The statute provides that states receive and distribute block grant funds and that the Bureau of Justice Assistance (BJA) of the U.S. Department of Justice awards discretionary grants for specified activities. Allocated largely on the basis of population, block grant funds are used for personnel, equipment, training, technical assistance, and information systems to improve criminal justice systems.
Date: May 20, 1998
Creator: Laney, Garrine P.
Object Type: Report
System: The UNT Digital Library
Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 88, No. 40, Ed. 1 Wednesday, May 20, 1998 (open access)

Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 88, No. 40, Ed. 1 Wednesday, May 20, 1998

Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1998
Creator: Gann, Sherry
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Mercedes Enterprise (Mercedes, Tex.), Vol. 86, No. 20, Ed. 1 Wednesday, May 20, 1998 (open access)

The Mercedes Enterprise (Mercedes, Tex.), Vol. 86, No. 20, Ed. 1 Wednesday, May 20, 1998

Weekly newspaper from Mercedes, Texas that includes local, state, and national news along with advertising.
Date: May 20, 1998
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Perry Daily Journal (Perry, Okla.), Vol. 105, No. 99, Ed. 1 Wednesday, May 20, 1998 (open access)

Perry Daily Journal (Perry, Okla.), Vol. 105, No. 99, Ed. 1 Wednesday, May 20, 1998

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1998
Creator: Brown, Gloria
Object Type: Newspaper
System: The Gateway to Oklahoma History

Oral History Interview with William Coffey, May 20, 1996

Access: Use of this item is restricted to the UNT Community
Interview with William Coffey, a Navy WWII veteran from Hopkins County, Texas. Coffey discusses joining the Navy in 1937, boot camp in San Diego, service aboard the USS Oklahoma (BB-37), transfer to submarines in the Philippines, the bombing of Cavite Navy Yard at the start of the war, assignment to the S-41 as a cook, combat around the Solomon Islands, attaining submarine qualifications, patrolling the northern Pacific, the character of the crew, transfer to the USS Sterlet (SS-392), patrols, medical leave, and service postwar.
Date: May 20, 1998
Creator: Maglaughlin, Barry & Coffey, William
Object Type: Book
System: The UNT Digital Library