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Characteristics of CoxTi1-xO2 thin films deposited by MOCVD
This paper deals with the growth and characterization of ferromagnetic cobalt doped TiO{sub 2} thin films deposited by liquid precursor metal organic chemical vapor deposition (MOCVD) using a new combination of the source materials Co(TMHD){sub 3}, tetrahydrofuran (THF), and titanium isopropoxide (TIP). An array of experiments reveals the intrinsic ferromagnetic nature of the grown films, and suggests that the magnetism is not generated by oxygen vacancies.
Date:
May 9, 2008
Creator:
McClure, A.; Kayani, A.; Idzerda, Y.U.; Arenholz, E. & Cruz, E.
Object Type:
Article
System:
The UNT Digital Library
Visualization Tools for Adaptive Mesh Refinement Data
Adaptive Mesh Refinement (AMR) is a highly effective method for simulations that span a large range of spatiotemporal scales, such as astrophysical simulations that must accommodate ranges from interstellar to sub-planetary. Most mainstream visualization tools still lack support for AMR as a first class data type and AMR code teams use custom built applications for AMR visualization. The Department of Energy's (DOE's) Science Discovery through Advanced Computing (SciDAC) Visualization and Analytics Center for Enabling Technologies (VACET) is currently working on extending VisIt, which is an open source visualization tool that accommodates AMR as a first-class data type. These efforts will bridge the gap between general-purpose visualization applications and highly specialized AMR visual analysis applications. Here, we give an overview of the state of the art in AMR visualization research and tools and describe how VisIt currently handles AMR data.
Date:
May 9, 2007
Creator:
Weber, Gunther H.; Beckner, Vincent E.; Childs, Hank; Ligocki,Terry J.; Miller, Mark C.; Van Straalen, Brian et al.
Object Type:
Article
System:
The UNT Digital Library
FLUIDIZED BED STEAM REFORMING ENABLING ORGANIC HIGH LEVEL WASTE DISPOSAL
Waste streams planned for generation by the Global Nuclear Energy Partnership (GNEP) and existing radioactive High Level Waste (HLW) streams containing organic compounds such as the Tank 48H waste stream at Savannah River Site have completed simulant and radioactive testing, respectfully, by Savannah River National Laboratory (SRNL). GNEP waste streams will include up to 53 wt% organic compounds and nitrates up to 56 wt%. Decomposition of high nitrate streams requires reducing conditions, e.g. provided by organic additives such as sugar or coal, to reduce NOX in the off-gas to N2 to meet Clean Air Act (CAA) standards during processing. Thus, organics will be present during the waste form stabilization process regardless of the GNEP processes utilized and exists in some of the high level radioactive waste tanks at Savannah River Site and Hanford Tank Farms, e.g. organics in the feed or organics used for nitrate destruction. Waste streams containing high organic concentrations cannot be stabilized with the existing HLW Best Developed Available Technology (BDAT) which is HLW vitrification (HLVIT) unless the organics are removed by pretreatment. The alternative waste stabilization pretreatment process of Fluidized Bed Steam Reforming (FBSR) operates at moderate temperatures (650-750 C) compared to vitrification (1150-1300 C). The …
Date:
May 9, 2008
Creator:
Williams, M
Object Type:
Article
System:
The UNT Digital Library
Renewables Portfolio Standards: A Factual Introduction toExperience from the United States
Renewables portfolio standards (RPS) have--since the late 1990s--proliferated at the state level in the United States. What began as a policy idea minted in California and first described in detail in the pages of the 'Electricity Journal' FPT has emerged as an important driver for renewable energy capacity additions in the United States. Over the years, articles in the 'Electricity Journal' have explored the RPS in more detail, identifying both its strengths and weaknesses. The present article provides an introduction to the history, concept, and design of the RPS, reviews early experience with the policy as applied at the state level, and provides a brief overview of Federal RPS proposals to date and the possible relationship between Federal and state RPS policies. Our purpose is to offer a factual introduction to the RPS, as applied and considered in the U.S. Though elements of state RPS design are summarized here, other publications provide a more thorough review of design lessons that emerge from that experience. In addition, the present article does not describe the results of economic analyses of Federal RPS proposals, though we do cite many of the analyses conducted by the U.S. DOE's Energy Information Administration (EIA).
Date:
May 9, 2007
Creator:
Wiser, R.; Namovicz, C.; Gielecki, M. & Smith, R.
Object Type:
Article
System:
The UNT Digital Library
Technology Review of Nondestructive Methods for Examination of Water Intrusion Areas on Hanford’s Double-Shell Waste Tanks
Under a contract with CH2M Hill Hanford Group, Inc., PNNL has performed a review of the NDE technology and methods for examination of the concrete dome structure of Hanford’s double-shell tanks. The objective was to provide a matrix of methodologies that could be evaluated based on applicability, ease of deployment, and results that could provide information that could be used in the ongoing structural analysis of the tank dome. PNNL performed a technology evaluation with the objective of providing a critical literature review for all applicable technologies based on constraints provided by CH2M HILL. These constraints were not mandatory, but were desired. These constraints included performing the evaluation without removing any soil from the top of the tank, or if necessary, requesting that the hole diameter needed to gain access to evaluate the top of the tank structure to be no greater than approximately 12-in. in diameter. PNNL did not address the details of statistical sampling requirements as they depend on an unspecified risk tolerance. PNNL considered these during the technology evaluation and have reported the results in the remainder of this document. Many of the basic approaches to concrete inspection that were reviewed in previous efforts are still in …
Date:
May 9, 2008
Creator:
Watkins, Michael L. & Pardini, Allan F.
Object Type:
Report
System:
The UNT Digital Library
Ariel Navigation
Patent for an airplane which will maintain its balance in the air and can be easily maneuvered up and down and around in the air.
Date:
May 9, 1911
Creator:
Nichols, Jack Lloyd
Object Type:
Patent
System:
The Portal to Texas History
Composition Pulp Plaster and Process of Manufacturing Same.
Patent for "a composition pulp plaster designed as a substitute for ordinary lime-plaster and equivalent materials and particularly adapted for use in warm moist climates, where the ordinary lime-plaster lacks durability and is rendered non-adherent. A further objective of the invention is to provide a cheap substitute for plaster which will be not only waterproof, but also fireproof and gas-proof or practically impervious to air" (lines 9-18). It includes instructions for manufacturing the plaster with various proportions of the ingredients depending on the purpose.
Date:
May 9, 1899
Creator:
Blake, David H. & Ray, Jeramiah P.
Object Type:
Patent
System:
The Portal to Texas History
Coin-Holder.
Patent for a coin holder, which holds a set of coins worth a specific amount.
Date:
May 9, 1911
Creator:
Vandervoort, Freegift
Object Type:
Patent
System:
The Portal to Texas History
Animal-Trap
Patent for a foot trap for catching animals known for their furs that will prevent the animal from gnawing the trap or his foot off.
Date:
May 9, 1911
Creator:
Roberson, Elige L.
Object Type:
Patent
System:
The Portal to Texas History
Automobile-Lamp
Patent for an automobile lamp that will rotate the direction the tires of the car turn.
Date:
May 9, 1911
Creator:
Wogenstahl, Leo J.
Object Type:
Patent
System:
The Portal to Texas History
Comptroller Susan Combs Distributes $633 Million in Monthly Sales Tax Revenue to Local Governments
This document provides information on the distribution of $633 million in monthly sales tax revenue to local governments.
Date:
May 9, 2012
Creator:
Texas. Comptroller's Office.
Object Type:
Book
System:
The Portal to Texas History
Proposed Changes in Marthuana Controls, 94th Congress: Comparative Analysis.
This report is about the Proposed Changes in Marthuana Controls, 94th Congress: Comparative Analysis.
Date:
May 9, 1975
Creator:
Library of Congress. Congressional Research Service.
Object Type:
Report
System:
The UNT Digital Library
Modeling of LH current drive in self-consistent elongated tokamak MHD equilibria
Calculations of non-inductive current drive typically have been used with model MHD equilibria which are independently generated from an assumed toroidal current profile or from a fit to an experiment. Such a method can lead to serious errors since the driven current can dramatically alter the equilibrium and changes in the equilibrium B-fields can dramatically alter the current drive. The latter effect is quite pronounced in LH current drive where the ray trajectories are sensitive to the local values of the magnetic shear and the density gradient. In order to overcome these problems, we have modified a LH simulation code to accommodate elongated plasmas with numerically generated equilibria. The new LH module has been added to the ACCOME code which solves for current drive by neutral beams, electric fields, and bootstrap effects in a self-consistent 2-D equilibrium. We briefly describe the model in the next section and then present results of a study of LH current drive in ITER. 2 refs., 6 figs., 2 tabs.
Date:
May 9, 1989
Creator:
Blackfield, D. T.; Devoto, R. S.; Fenstermacher, M. E.; Bonoli, P. T.; Porkolab, M. & Yugo, J.
Object Type:
Article
System:
The UNT Digital Library
Modular invariant gaugino condensation
The construction of effective supergravity lagrangians for gaugino condensation is reviewed and recent results are presented that are consistent with modular invariance and yield a positive definite potential of the noscale type. Possible implications for phenomenology are briefly discussed. 29 refs.
Date:
May 9, 1991
Creator:
Gaillard, M. K.
Object Type:
Article
System:
The UNT Digital Library
Nuclear hazardous waste cost control management
The effects of the waste content of glass waste forms on Savannah River high-level waste disposal costs are currently under study to adjust the glass frit content to optimize the glass waste loadings and therefore significantly reduce the overall waste disposal cost. Changes in waste content affect onsite Defense Waste Changes in waste contents affect onsite Defense Waste Processing Facility (DWPF) costs as well as offsite shipping and repository emplacement charges. A nominal 1% increase over the 28 wt% waste loading of DWPF glass would reduce disposal costs by about $50 million for Savannah River wastes generated to the year 2000. Optimization of the glass waste forms to be produced in the SWPF is being supported by economic evaluations of the impact of the forms on waste disposal costs. Glass compositions are specified for acceptable melt processing and durability characteristics, with economic effects tracked by the number of waste canisters produced. This paper presents an evaluation of the effects of variations in waste content of the glass waste forms on the overall cost of the disposal, including offsite shipment and repository emplacement, of the Savannah River high-level wastes.
Date:
May 9, 1991
Creator:
Selg, R.A.
Object Type:
Article
System:
The UNT Digital Library
New concepts for drift pumping a thermal barrier with rf
Pump neutral beams, which are directed into the loss cone of the TMX-U plugs, are normally used to pump ions from the thermal barriers. Because these neutral beams introduce cold gas that reduces pumping efficiency, and require a straight line entrance and exit from the plug, alternate methods are being investigated to provide barrier pumping. To maintain the thermal barrier, either of two classes of particles can be pumped. First, the collisionally trapped ions can be pumped directly. In this case, the most promising selection criterion is the azimuthal drift frequency. Second, the excess sloshing-ion density can be removed, allowing the use of increased sloshing-beam density to pump the trapped ions. The selection mechanism in this case is the Doppler-shifted ion-cyclotron resonance of the high-energy sloshing-ions (3 keV less than or equal to U/sub parallel/ less than or equal to 10 keV).
Date:
May 9, 1985
Creator:
Barter, J.D.; Baldwin, D.; Chen, Y. & Poulsen, P.
Object Type:
Article
System:
The UNT Digital Library
Interrelationships between man, energy, and water quality: a new methodology for integrative analyses
The STORET/MSP option was used to obtain county aggregated information on ambient water quality for sixty parameters during the period 1950 to 1978. Masks, extended EXTRACT specifications and bounds on allowable values limited inclusion of erroneous data. Remark codes were required to aggregate STORET parameters to obtain increased numbers of observations. Numerous statistical analyses led to the conclusions that medians were more useful than means, that trimming on number of observations was required to eliminate counties with extreme values, and that many parameters required logarithmic transformation to be useful in regional analyses. County aggregated data for nineteen water quality parameters were examined in terms of their ability to describe qualitative chemical characteristics of water. Anion--cation balances as well as expected relationships between conductivity and other parameters were correctly accounted for. Factor analysis indicated the existence of three principal components describing patterns between metal ions, non-metal ions, and alkalinity-bicarbonate, respectively. These factors were used in place of the original complete set of water quality parameters in a structural equation approach describing relationships between variables of mans activites. It was found that counties with high industrial electric consumption, farming and mineral shipments tended to have increased levels of most water quality parameters. …
Date:
May 9, 1979
Creator:
Kaplan, E. & Thode, H.C. Jr.
Object Type:
Article
System:
The UNT Digital Library
Parian and Teflon in 1A Redox Solutions
This report analyzes Parian and Teflon that were exposed to solutions of 1AX, 1AS, and 1AF, ANL June 1, 1948 Flowsheet, under conditions described in the following report.
Date:
May 9, 1949
Creator:
Koenig, W. W.
Object Type:
Report
System:
The UNT Digital Library
Acceptance-test specifications for Test Number Four: process sensor and display test. [LMFBR]
This document provides the general instructions for performing acceptance Test Number Four as indicated in the Acceptance Test Index (TI-022-130-003). Also indicated are the plant conditions and special equipment required to conduct the test. The acceptance criteria for each portion of the test are specified.
Date:
May 9, 1975
Creator:
Bell, C.R.
Object Type:
Report
System:
The UNT Digital Library
Application of muon spin relaxation experiment to the mixed state superconductors
We discuss the use of muon spin relaxation ({mu}{sup +}SR) technique to study the mixed state of superconductors. Besides the application for static vortex configurations, we argue that large vortex motion can manifest itself as a narrowed time-averaged field distribution, which in turn results in a smaller relaxation rate. A static but disordered vortex configuration can also reduce the relaxation. We summarize these arguments. 7 refs.
Date:
May 9, 1991
Creator:
Inui, M. (Los Alamos National Lab., NM (USA)) & Harshman, D.R. (AT and T Bell Labs., Murray Hill, NJ (USA))
Object Type:
Article
System:
The UNT Digital Library
Neutron flux, spectrum, and dose equivalent measurements for a 4500-W(th) /sup 238/PuO/sub 2/ general purpose heat source
The total emission rate is (4.5 +- 0.4) 10/sup 7/ n/s, and the average neutron energy is (1.64 +- 0.07) MeV. The factor for converting from neutron fluence to dose equivalent for this spectrum is (3.10 +- 0.24) 10/sup -5/ mRem/n-cm/sup -2/. The factor for converting from neutron fluence to tissue absorbed dose is (3.18 +- 0.26) 10/sup -6/ mRad/n-cm/sup -2/.
Date:
May 9, 1985
Creator:
Anderson, M.E.
Object Type:
Report
System:
The UNT Digital Library
Nuclear-data needs for inertial-confinement fusion (ICF)
Our survey was limited to ICF programs in the United States. It included researchers in laser and heavy ion fusion, target design, target diagnostics, and conceptual reactor design. We asked each of these people to read the current data needs for magnetic fusion energy and to comment on additional data that they require.
Date:
May 9, 1983
Creator:
Haight, R. C. & Motz, H. T.
Object Type:
Article
System:
The UNT Digital Library
Large P sub t jets at CDF
The inclusive jet cross section and the dijet mass spectrum have been measured at the Fermilab Tevatron Collider at {radical}s = 1.8 TeV. These measurements span approximately 7 orders of magnitude in cross section and contain jets up to 400 GeV in transverse energy and dijet masses up to 950 GeV. Comparisons have been made to QCD at both orders {alpha}{sub s}{sup 2} and {alpha}{sub s}{sup 3}. 8 refs., 9 figs.
Date:
May 9, 1990
Creator:
Dell'Orso, M. (Pisa Univ. (Italy). Dipt. di Fisica)
Object Type:
Article
System:
The UNT Digital Library
Bremsstrahlung from high Z impurities in hot plasmas
This is a study of the effect of core electron and plasma screening on Bremsstrahlung from high-Z impurities in hot plasmas. 3 refs., 7 figs., 1 tab.
Date:
May 9, 1988
Creator:
DeWitt, H.; Rogers, F. & Iglesias, C.
Object Type:
Report
System:
The UNT Digital Library