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557 Matching Results
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Altus Times (Altus, Okla.), Vol. 100, No. 272, Ed. 1 Wednesday, February 2, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, February 2, 2000
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
AMR++: Object-Oriented Parallel Adaptive Mesh Refinement
Adaptive mesh refinement (AMR) computations are complicated by their dynamic nature. The development of solvers for realistic applications is complicated by both the complexity of the AMR and the geometry of realistic problem domains. The additional complexity of distributed memory parallelism within such AMR applications most commonly exceeds the level of complexity that can be reasonable maintained with traditional approaches toward software development. This paper will present the details of our object-oriented work on the simplification of the use of adaptive mesh refinement on applications with complex geometries for both serial and distributed memory parallel computation. We will present an independent set of object-oriented abstractions (C++ libraries) well suited to the development of such seemingly intractable scientific computations. As an example of the use of this object-oriented approach we will present recent results of an application modeling fluid flow in the eye. Within this example, the geometry is too complicated for a single curvilinear coordinate grid and so a set of overlapping curvilinear coordinate grids' are used. Adaptive mesh refinement and the required grid generation work to support the refinement process is coupled together in the solution of essentially elliptic equations within this domain. This paper will focus on the …
Date:
February 2, 2000
Creator:
Quinlan, D. & Philip, B.
Object Type:
Report
System:
The UNT Digital Library
The Autocatalytic Behavior of Trimethylindium During Thermal Decomposition
Pyrolysis of trimethylindium (TMIn) in a hot-wall flow-tube reactor has been investigated at temperatures between 573 and 723 K using a modulated molecular-beam mass-sampling technique and detailed numerical modeling. The TMIn was exposed to various mixtures of carrier gases: He, H{sub 2}, D{sub 2}, and C{sub 2}H{sub 4}, in an effort to elucidate the behavior exhibited by this compound in different chemical environments. The decomposition of TMIn is a heterogeneous, autocatalytic process with an induction period that is carrier-gas dependent and lasts on the order of minutes. After activation of the tube wall, the thermolysis exhibits a steady-state behavior that is surface mediated. This result is contrary to prior literature reports, which state that decomposition occurs in the gas phase via successive loss of the CH{sub 3} ligands. This finding also suggests that the bond dissociation energy for the (CH{sub 3}){sub 2}In-CH{sub 3} bond derived from flow-tube investigations is erroneous and should be reevaluated.
Date:
February 2, 2000
Creator:
McDaniel, Anthony H. & Allendorf, M. D.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 81, Ed. 1 Wednesday, February 2, 2000
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Certification of solar products - The Florida experience
Florida legislation enacted in 1976 directed the Florida Solar Energy Center (FSEC) to develop standards for solar energy systems manufactured or sold in the state, establish criteria for testing the performance of solar energy systems, and provide a means to display compliance with approved performance tests for these systems. This mandate has been effectively implemented for both solar domestic water heating and solar pool heating systems. With growing interest and markets for photovoltaic systems, plans are presently being developed to expand the scope of the mandate to include photovoltaic technology. This paper discusses four complementary facets of a photovoltaic (PV) system certification program. They include PV module performance characterization and rating; PV system design review and approval; examination and authorization of photovoltaic system installers; and inspection and acceptance testing of PV system installation. The suggested photovoltaic system process builds on lessons learned from over 20 years of testing, certifying and labeling of solar thermal collectors, and the certification of solar thermal systems.
Date:
February 2, 2000
Creator:
POST,HAROLD N.; ROLAND,JAMES D.; VENTRE,GERARD G. & HUGGINS,JAMES C.
Object Type:
Article
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 105, No. 9, Ed. 1 Wednesday, February 2, 2000
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Collegian (Hurst, Tex.), Vol. 12, No. 17, Ed. 1 Wednesday, February 2, 2000
Weekly student newspaper published in Hurst, Texas and serving the Tarrant County College District that includes school news and information along with advertising.
Date:
February 2, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
A comparison of spin observable predictions for RHIC
There have been many versions of spin-dependent parton distributions in the literature. Although most agree with present data within uncertainties, they are based upon different physical assumptions. Some physical models are discussed and the corresponding predictions for double spin asymmetries are shown. A summary of the most feasible measurements in the appropriate kinematic regions at RHIC, which should yield the most useful information about the polarized gluon distribution, is given.
Date:
February 2, 2000
Creator:
Ramsey, G. P.
Object Type:
Article
System:
The UNT Digital Library
Computed Tomography (CT) Standards
There is currently no standardized method to check the measurement capabilities of computed tomography (CT) systems within industry. The current method to determine the functionality of CT systems is by use of a test phantom to represent the actual part to be tested. A standard method to check the software algorithms when measuring such parameters as density of a material and the size of an object is not readily available. Many different materials are evaluated by CT systems. A set of standards necessitates the inclusion of materials that cover the gambit of materials encountered. The Federal Manufacturing and Technologies (FM and T) CT standards are designed to accommodate a variety of materials and several different sizes. This provides a method to check the CT system for size measurement capabilities and material density measurement as well as aid in optimizing the geometric parameters of the machine configuration.
Date:
February 2, 2000
Creator:
Hubert, R. R. & Beach, J. M.
Object Type:
Report
System:
The UNT Digital Library
Conductor development for High Energy Physics - Plans and Status of the U.S. Program
None
Date:
February 2, 2000
Creator:
Scanlan, R. M.
Object Type:
Article
System:
The UNT Digital Library
Department of the Navy: Breakdown of In-Transit Inventory Process Leaves It Vulnerable to Fraud
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO followed up on its previous report on the Navy's in-transit inventory management system, focusing on: (1) determining what happened to the 34 shipments the Navy could not account for; (2) confirming that the Navy actually had receipt information for the 45 shipments that it could not account for in the previous report; and (3) Navy initiatives that address some of the specific control issues associated with in-transit inventory."
Date:
February 2, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Electrodialysis technology for salt recovery from aluminum salt cake
Electrodialysis technology for recovering salt from aluminum salt cake is being developed at Argonne National Laboratory. Salt cake, a slag-like aluminum-industry waste stream, contains aluminum metal, salt (NaCl and KCl), and nonmetallics (primarily aluminum oxide). Salt cake can be recycled by digesting with water and filtering to recover the metal and oxide values. A major obstacle to widespread salt cake recycling is the cost of recovering salt from the process brine. Electrodialysis technology developed at Argonne appears to be a cost-effective approach to handling the salt brines, compared to evaporation or disposal. In Argonne's technology, the salt brine is concentrated until salt crystals are precipitated in the electrodialysis stack; the crystals are recovered downstream. The technology is being evaluated on the pilot scale using Eurodia's EUR 40-76-5 stack.
Date:
February 2, 2000
Creator:
Hryn, J. N.; Krumdick, G.; Graziano, D. & Sreenivasarao, K.
Object Type:
Article
System:
The UNT Digital Library
Estimating model parameter values for total system performance assessment
The intrinsic dissolution rates of nine borosilicate waste glasses were extracted from the results of MCC-1 tests conducted for durations long enough that the solution pH reached a nearly constant value but short enough that the buildup of dissolved species did not affect the dissolution rate. The effects of the pH and temperature on the measured rates were deconvoluted to determine the sensitivity of the rate to the glass composition. The intrinsic dissolution rates were similar for all of these glasses and were not correlated with the glass composition. The mean and standard deviation of the intrinsic dissolution rates of these glasses are log k{sub 0}/[g/(m{sup 2}{center_dot}d)] = 8.2 {+-} 0.2.
Date:
February 2, 2000
Creator:
Ebert, W. L.; Zyryanov, V. N. & Cunnane, J. C.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, February 2, 2000
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Ferroelectric and piezoelectric properties of MOCVD Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}PbTiO{sub 3} epitaxial thin films
The authors have grown epitaxial Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3} (PMN) and (1-x)(Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3})-x(PBTiO{sub 3})(PMN-PT)thin films by metalorganic chemical vapor deposition at 700 -- 780 C on (100) SrTiO{sub 3} and SrRuO{sub 3}/SrTiO{sub 3} substrates. The zero-bias permittivity and loss measured at room temperature and 10 kHz for 220 nm thick pure PMN films were 900 and 1.5%, respectively. For PMN-PT films the small-signal permittivity ranged from 1000 to 1500 depending on deposition conditions and Ti content; correspondingly low values for the zero-bias dielectric loss between 1 and 5% were determined for all specimens. For PMN-PT with x of approximately 0.30--0.35, polarization hysteresis with P{sub r}{approximately}18{mu}C/cm{sup 2} was obtained. Initial piezoresponse data are discussed.
Date:
February 2, 2000
Creator:
Baumann, P. K.; Bai, G. R.; Streiffer, S. K.; Ghosh, K.; Auciello, O.; Stemmer, S. et al.
Object Type:
Article
System:
The UNT Digital Library
Gulf War Illnesses: Basic Questions Unanswered
Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the expenditures by the Departments of Defense (DOD), Veterans Affairs (VA), and Health and Human Services (HHS) on Gulf War veterans' illnesses, focusing on the : (1) amount of money that these three departments spent in fiscal years 1997 and 1998 on research and investigation into Gulf War veterans' illnesses and health concerns; (2) results of the research and investigation spending; (3) extent of coordination between the Coordinating Board's Research Working Group and DOD's Office of the Special Assistant for Gulf War Illnesses; and (4) management of contracts supporting DOD's Office of the Special Assistant."
Date:
February 2, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Illustrated Paperboy (Cleveland, Tex.), Vol. 7, No. 45, Ed. 1 Wednesday, February 2, 2000
Weekly newspaper from Cleveland, Texas that includes local, county, and state news along with extensive advertising.
Date:
February 2, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The impact of process parameters on gold elimination from soldered connector assemblies
Minimizing the likelihood of solder joint embrittlement in connectors is realized by reducing or eliminating retained Au plating and/or Au-Sn intermetallic compound formation from the assemblies. Gold removal is performed most effectively by using a double wicking process. When only a single wicking procedure can be used, a higher soldering temperature improves the process of Au removal from the connector surfaces and to a nominal extent, removal of Au-contaminated solder from the joint. A longer soldering time did not appear to offer any appreciable improvement toward removing the Au-contaminated solder from the joint. Because the wicking procedure was a manual process, it was operator dependent.
Date:
February 2, 2000
Creator:
VIANCO,PAUL T. & KILGO,ALICE C.
Object Type:
Article
System:
The UNT Digital Library
IRS Restructuring Act: Implementation Under Way but Agency Modernization Important to Success
Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the Internal Revenue Service's (IRS) progress in implementing the taxpayer rights and protection mandates of the IRS Restructuring and Reform Act of 1998 and IRS' ongoing efforts to modernize its organizational structure, performance management system, and information systems."
Date:
February 2, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 21, No. 88, Ed. 1 Wednesday, February 2, 2000
Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
Rigg, John
Object Type:
Newspaper
System:
The Portal to Texas History
Mannford Eagle (Mannford, Okla.), Vol. 18, No. 49, Ed. 1 Wednesday, February 2, 2000
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
Retherford, Bill R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mannford Star (Mannford, Okla.), Vol. 6, No. 22, Ed. 1 Wednesday, February 2, 2000
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
McMurry War Whoop (Abilene, Tex.), Vol. 76, No. 8, Ed. 1, Wednesday, February 2, 2000
Weekly student newspaper from McMurry University in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
February 2, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History