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15th Street News (Midwest City, Okla.), Vol. 33, No. 13, Ed. 1 Friday, December 12, 2003
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
December 12, 2003
Creator:
Pound, Jaylynn Christian
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Active Cathodes for Super-High Power Density Solid Oxide Fuel Cells Through Space Charge Effects Quarterly Report: July-September 2003
This report summarizes the work done during the fourth quarter of the project. Effort was directed in two areas, namely, continued further development of the model on the role of connectivity on ionic conductivity of porous bodies, including the role of grain boundaries and space charge, and its relationship to cathode polarization; and fabrication of samaria-doped ceria porous (SDC). The work on the model development involves calculation of the effect of space charge on transport through porous bodies. Three specific cases have been examined: (1) Space charge resistivity greater than the grain resistivity, (2) Space charge resistivity equal to the grain resistivity, and (3) Space charge resistivity lower than the grain resistivity. The model accounts for transport through three regions: the bulk of the grain, the space charge region, and the structural part of the grain boundary. The effect of neck size has been explicitly incorporated. In future work, the effective resistivity will be incorporated into the effective cathode polarization resistance. The results will then be compared with experiments.
Date:
December 12, 2003
Creator:
Virkar, Anil V.
Object Type:
Report
System:
The UNT Digital Library
Alaska Native Villages: Most Are Affected by Flooding and Erosion, but Few Qualify for Federal Assistance
A letter report issued by the General Accounting Office with an abstract that begins "Approximately 6,600 miles of Alaska's coastline and many of the low-lying areas along the state's rivers are subject to severe flooding and erosion. Most of Alaska's Native villages are located on the coast or on riverbanks. In addition to the many federal and Alaska state agencies that respond to flooding and erosion, Congress established the Denali Commission in 1998 to, among other things, provide economic development services and to meet infrastructure needs in rural Alaska communities. Congress directed GAO to study Alaska Native villages affected by flooding and erosion and to 1) determine the extent to which these villages are affected, 2) identify federal and state flooding and erosion programs, 3) determine the current status of efforts to respond to flooding and erosion in nine villages, and 4) identify alternatives that Congress may wish to consider when providing assistance for flooding and erosion."
Date:
December 12, 2003
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 105, No. 231, Ed. 1 Friday, December 12, 2003
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 12, 2003
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Applications of photoemission electron microscopy (PEEM) in magnetism research
None
Date:
December 12, 2003
Creator:
Scholl, Andreas
Object Type:
Article
System:
The UNT Digital Library
Approximating spheroid inductive responses using spheres
The response of high permeability ({mu}{sub r} {ge} 50) conductive spheroids of moderate aspect ratios (0.25 to 4) to excitation by uniform magnetic fields in the axial or transverse directions is approximated by the response of spheres of appropriate diameters, of the same conductivity and permeability, with magnitude rescaled based on the differing volumes, D.C. magnetizations, and high frequency limit responses of the spheres and modeled spheroids.
Date:
December 12, 2003
Creator:
Smith, J. Torquil & Morrison, H. Frank
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 81, No. 375, Ed. 1 Friday, December 12, 2003
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 12, 2003
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Bioanalytical Applications of Real-Time ATP Imaging Via Bioluminescence
The research discussed within involves the development of novel applications of real-time imaging of adenosine 5'-triphosphate (ATP). ATP was detected via bioluminescence and the firefly luciferase-catalyzed reaction of ATP and luciferin. The use of a microscope and an imaging detector allowed for spatially resolved quantitation of ATP release. Employing this method, applications in both biological and chemical systems were developed. First, the mechanism by which the compound 48/80 induces release of ATP from human umbilical vein endothelial cells (HUVECs) was investigated. Numerous enzyme activators and inhibitors were utilized to probe the second messenger systems involved in release. Compound 48/80 activated a G{sub q}-type protein to initiate ATP release from HUVECs. Ca{sup 2+} imaging along with ATP imaging revealed that activation of phospholipase C and induction of intracellular Ca{sup 2+} signaling were necessary for release of ATP. Furthermore, activation of protein kinase C inhibited the activity of phospholipase C and thus decreased the magnitude of ATP release. This novel release mechanism was compared to the existing theories of extracellular release of ATP. Bioluminescence imaging was also employed to examine the role of ATP in the field of neuroscience. The central nervous system (CNS) was dissected from the freshwater snail Lymnaea stagnalis. …
Date:
December 12, 2003
Creator:
Gruenhagen, Jason Alan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 97, No. 100, Ed. 1 Friday, December 12, 2003
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
December 12, 2003
Creator:
Cartwright, Brian & Morgan, Clay
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, December 12, 2003
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
December 12, 2003
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 108, No. 100, Ed. 1 Friday, December 12, 2003
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 12, 2003
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Compatriots Willie Walker and John Greer delivered these comfort items to the Veterans Hospital in Bonham, Texas
Document about the McKinney chapter of the Texas Society, Sons of the American Revolution.
Date:
December 12, 2003
Creator:
Texas Society, Sons of the American Revolution, McKinney Chapter 63
Object Type:
Text
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 20, No. 34, Ed. 1 Friday, December 12, 2003
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
December 12, 2003
Creator:
Vercher, Dennis
Object Type:
Newspaper
System:
The UNT Digital Library
Electromagnetic Wave Propagation in Two-Dimensional Photonic Crystals
In this dissertation, they have undertaken the challenge to understand the unusual propagation properties of the photonic crystal (PC). The photonic crystal is a medium where the dielectric function is periodically modulated. These types of structures are characterized by bands and gaps. In other words, they are characterized by frequency regions where propagation is prohibited (gaps) and regions where propagation is allowed (bands). In this study they focus on two-dimensional photonic crystals, i.e., structures with periodic dielectric patterns on a plane and translational symmetry in the perpendicular direction. They start by studying a two-dimensional photonic crystal system for frequencies inside the band gap. The inclusion of a line defect introduces allowed states in the otherwise prohibited frequency spectrum. The dependence of the defect resonance state on different parameters such as size of the structure, profile of incoming source, etc., is investigated in detail. For this study, they used two popular computational methods in photonic crystal research, the Finite Difference Time Domain method (FDTD) and the Transfer Matrix Method (TMM). The results for the one-dimensional defect system are analyzed, and the two methods, FDTD and TMM, are compared. Then, they shift their attention only to periodic two-dimensional crystals, concentrate on their …
Date:
December 12, 2003
Creator:
Foteinopoulou, Stavroula
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, December 12, 2003
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 12, 2003
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Final Project Report
This report provides a description of the main accomplishments of the EMSP funded research, including products such as conference presentations and publications (including those still in preparation). The purpose of this study was to better understand the chemical interactions between dissolved aqueous contaminants and carbonate minerals occurring as coatings on mineral grains in the vadose zone beneath the Hanford reserve. This information is important for construction of improved reactive transport models intended to predict the subsurface migration of contaminants. We made improvements to the hydrothermal atomic force microscope (HAFM) design to be used in this project. The original HAFM was built with funding from the U.S. DOE, Office of Basic Energy Sciences. Improvements include operating limits of 70 bars and 170 C, from an original limit of 12 bars and 150 C. This product is patented. We completed a series of studies of magnesite, MgCO3, because this mineral is structurally equivalent to calcite but reacts much more slowly, allowing us to study carbonate reactivity under pH conditions (i.e., low pH) that are much more problematic for studies of calcite but which are nevertheless relevant to in-situ conditions. We found that dissolving magnesite exhibits a dramatic change in step orientation, and …
Date:
December 12, 2003
Creator:
Eggleston, Carrick M.
Object Type:
Report
System:
The UNT Digital Library
Final Report for ''SOURCES AND SINKS OF CARBON FROM LAND-USE CHANGE AND MANAGEMENT: A GLOBAL SYNTHESIS'' Project Period September 15, 2001--September 14, 2003
Land management and land-use change can either release carbon (as CO{sub 2}) to the atmosphere, for example when forests are converted to agricultural lands, or withdraw carbon from the atmosphere as forests grow on cleared lands or as management practices sequester carbon in soil. The purpose of this work was to calculate the annual sources and sinks of carbon from changes in land use and management, globally and for nine world regions, over the period 1850 to 2000. The approach had three components. First, rates of land-use change were reconstructed from historical information on the areas of croplands, pastures, forests, and other lands and from data on wood harvests. In most regions, land-use change included the conversion of natural ecosystems to cultivated lands and pastures, including shifting cultivation, harvest of wood (for timber and fuel), and the establishment of tree plantations. In the U.S., woody encroachment and woodland thickening as a result of fire suppression were also included. Second, the amount of carbon per hectare in vegetation and soils and changes in that carbon as a result of land-use change were determined from data obtained in the ecological and forestry literature. These data on land-use change and carbon stocks were …
Date:
December 12, 2003
Creator:
Houghton, R.A.
Object Type:
Report
System:
The UNT Digital Library
Foreign Remittances to Latin America
This report describes the remittance market place, and then using selected Latin American and Caribbean countries as examples shows how competition and government regulation affect the price of remittances.
Date:
December 12, 2003
Creator:
Eubanks, Walter & Smale, Pauline
Object Type:
Report
System:
The UNT Digital Library
High Level Waste Tank Gamma Profiling
Cleanup at the Savannah River Site brings with it the need to clean out and close down the radioactive waste tanks constructed in support of the fuel rod dissolution process. An innovative technique for assaying waste tanks has been developed at the Savannah River Site. The technique uses a gamma detector in the annular space between the inner and outer walls of double walled tanks. Unique shielding, counting electronics, and deployment techniques were developed to facilitate mapping interstitial liquid levels, sludge layers and other structures in the waste tank located near the tank walls. The techniques used, results, and lessons learned will be discussed.
Date:
December 12, 2003
Creator:
Moore, F.S. Jr.
Object Type:
Article
System:
The UNT Digital Library
[Historic Marker Application: F. C. L. and Emilie Neuhaus House]
Application materials submitted to the Texas Historical Commission requesting a historic marker for the F. C. L. and Emilie Neuhaus House, in Houston, Texas. The materials include the inscription text of the marker, narrative, and photographs.
Date:
December 12, 2003
Creator:
Texas Historical Commission
Object Type:
Text
System:
The Portal to Texas History
Homogeneous Precipitation of Nickel Hydroxide Powders
Precipitation and characterization of nickel hydroxide powders were investigated. A comprehensive precipitation model incorporating the metal ion hydrolysis, complexation and precipitation reactions was developed for the production of the powders with urea precipitation method. Model predictions on Ni{sup 2+} precipitation rate were confirmed with precipitation experiments carried out at 90 C. Experimental data and model predictions were in remarkable agreement. Uncertainty in the solubility product data of nickel hydroxides was found to be the large contributor to the error. There were demonstrable compositional variations across the particle cross-sections and the growth mechanism was determined to be the aggregation of primary crystallites. This implied that there is a change in the intercalate chemistry of the primary crystallites with digestion time. Predicted changes in the concentrations of simple and complex ions in the solution support the proposed mechanism. The comprehensive set of hydrolysis reactions used in the model described above allows the investigation of other systems provided that accurate reaction constants are available. the fact that transition metal ions like Ni{sup 2+} form strong complexes with ammonia presents a challenge in the full recovery of the Ni{sup 2+}. On the other hand, presence of Al{sup 3+} facilitates the complete precipitation of Ni{sup …
Date:
December 12, 2003
Creator:
Mavis, Bora
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 48, No. 15, Ed. 1 Friday, December 12, 2003
Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date:
December 12, 2003
Creator:
Lynch, Mary Louise
Object Type:
Newspaper
System:
The Portal to Texas History
Limits to Enhanced IR Layering Set by Long Scale Ablator Roughness
We show that long scale-length ablator roughness sets a limit to the enhanced IR layering power possible in a NIF ignition hohlraum. This limit can be more restrictive than the limit set by thermal conduction. High IR power absorption, characteristic of the ablator material, combined with ablator roughness can produce ice thickness variations which exceed the NIF ice layer roughness specification. For example, if the capsule IR absorption coefficient is greater than 13 cm{sup -1}, the max IR power is less than the 4 Q{sub DT} limit set by thermal conduction.
Date:
December 12, 2003
Creator:
Kozioziemski, B J
Object Type:
Report
System:
The UNT Digital Library
Low Cycle Fatigue Analysis of Storage Canisters Due to Expansion of Contents
Qualification of storage canisters due to the expansion behavior of plutonium metal during phase transitions requires a combined experimental and analytical modeling effort. Tests were conducted at Los Alamos National Laboratory to define the expansion behavior of plutonium metal during the alpha-beta-gamma phase transitions. Test results showed that the expansion is anisotropic due to the container wall constraint. The plutonium expansion parameters were calculated from test data, and combined with a finite element analysis to determine the stress state of the storage canisters. Strain values were computed and compared with the ASME Code secondary and peak stress limits. Since the applied expansion strain exceeds the strain of 10 cycles in the ASME Code design fatigue curve, the ASME Code design fatigue curve was extended to values below 10 cycles.
Date:
December 12, 2003
Creator:
Flanders, H.E. Jr.
Object Type:
Article
System:
The UNT Digital Library