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1,004
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Texas Youth Commission Review of Agency Treatment Effectiveness: 2006
Annual report of the Texas Youth Commission providing an analysis of various programs offered by the agency and statistics related to the impact of these programs on recidivism rates for delinquent youth, with background information and relevant data.
Date:
~2006
Creator:
Texas Youth Commission
Object Type:
Report
System:
The Portal to Texas History
1st Quarter, 2007 Results New Community Supervision Diversion Funding Provided by the 79th Legislature
Series of charts and graphs representing funding expenses for state felony revocations, early discharge, and CSO employment numbers with comparisons to previous fiscal years.
Date:
2006
Creator:
Texas. Community Justice Assistance Division.
Object Type:
Text
System:
The Portal to Texas History
2006 Catalysis Gordon Conference
This Report is about Gordon Conference on Catalysis which was held at Colbey-Sawyer College.
Date:
January 1, 2006
Creator:
Davis, Robert & Gray, Nancy Ryan
Object Type:
Article
System:
The UNT Digital Library
Absence of Rapid Proton Decay and Origin of Low-Energy Particlesand Yukawa Couplings
In string theory, massless particles often originate from a symmetry breaking of a large gauge symmetry G to its subgroup H. The absence of dimension-4 proton decay in supersymmetric theories suggests that ({bar D},L) are different from {bar H}({bar 5}) in their origins. In this article, we consider a possibility that they come from different irreducible components in g/h. Requiring that all the Yukawa coupling constants of quarks and leptons be generated from the super Yang-Mills interactions of G, we found in the context of Georgi-Glashow H = SU(5) unification that the minimal choice of G is E{sub 7} and E{sub 8} is the only alternative. This idea is systematically implemented in Heterotic String, M theory and F theory, confirming the absence of dimension 4 proton decay operators. Not only H = SU(5) but also G constrain operators of effective field theories, providing non-trivial information.
Date:
January 1, 2006
Creator:
Tatar, Radu & Watari, Taizan
Object Type:
Article
System:
The UNT Digital Library
Accounting for Socioeconomic Change from Offshore Oil and Gas: Cumulative Effects on Louisiana's coastal Parishes, 1969-2000
This study looks at the socioeconomic impact in Louisiana's coastal parishes as a result of off shore oil and gas. The study looks at the impact of reserves under federal jurisdiction on the income of people in the region.
Date:
2006
Creator:
Pulsipher, Allan G.
Object Type:
Text
System:
The UNT Digital Library
Actinic Inspection of EUV Programmed Multilayer Defects andCross-comparison Measurements
This article is about the Actinic Inspection of Extreme Ultraviolet (EUV) lithography Programmed Multilayer Defects and cross-comparison Measurements.
Date:
January 1, 2006
Creator:
Goldberg, Kenneth A.; Barty, Anton; Liu, Yanwei; Kearney,Patrick; Tezuka, Yoshihiro; Terasawa, Tsuneo et al.
Object Type:
Article
System:
The UNT Digital Library
Advanced Combustion Systems for Next Generation Gas Turbines
Next generation turbine power plants will require high efficiency gas turbines with higher pressure ratios and turbine inlet temperatures than currently available. These increases in gas turbine cycle conditions will tend to increase NOx emissions. As the desire for higher efficiency drives pressure ratios and turbine inlet temperatures ever higher, gas turbines equipped with both lean premixed combustors and selective catalytic reduction after treatment eventually will be unable to meet the new emission goals of sub-3 ppm NOx. New gas turbine combustors are needed with lower emissions than the current state-of-the-art lean premixed combustors. In this program an advanced combustion system for the next generation of gas turbines is being developed with the goal of reducing combustor NOx emissions by 50% below the state-of-the-art. Dry Low NOx (DLN) technology is the current leader in NOx emission technology, guaranteeing 9 ppm NOx emissions for heavy duty F class gas turbines. This development program is directed at exploring advanced concepts which hold promise for meeting the low emissions targets. The trapped vortex combustor is an advanced concept in combustor design. It has been studied widely for aircraft engine applications because it has demonstrated the ability to maintain a stable flame over a …
Date:
January 1, 2006
Creator:
Haynes, Joel; Janssen, Jonathan; Russell, Craig & Huffman, Marcus
Object Type:
Report
System:
The UNT Digital Library
Advanced Multi-Product Coal Utilization By-Product Processing Plant
Prepared by the United States Government, this report is a descriptive journey of the Advanced Multi-Product Coal Utilization By-Product Processing Plant
Date:
January 1, 2006
Creator:
Groppo, John & Robl, Thomas
Object Type:
Report
System:
The UNT Digital Library
The Advocate, Volume 11, Issue 1, January-March 2006
Quarterly update providing information on environmental regulations for small businesses and local governments in Texas.
Date:
January 2006
Creator:
Texas Commission on Environmental Quality
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Agent-based control of distributed infrastructure resources.
None
Date:
January 1, 2006
Creator:
Smith, Randall B.; Phillips, Laurence R.; Link, Hamilton E. & Weiland, Laura
Object Type:
Report
System:
The UNT Digital Library
ALEGRA-HEDP validation strategy.
This report presents a initial validation strategy for specific SNL pulsed power program applications of the ALEGRA-HEDP radiation-magnetohydrodynamics computer code. The strategy is written to be (1) broadened and deepened with future evolution of particular specifications given in this version; (2) broadly applicable to computational capabilities other than ALEGRA-HEDP directed at the same pulsed power applications. The content and applicability of the document are highly constrained by the R&D thrust of the SNL pulsed power program. This means that the strategy has significant gaps, indicative of the flexibility required to respond to an ongoing experimental program that is heavily engaged in phenomena discovery.
Date:
January 1, 2006
Creator:
Garasi, Christopher Joseph; Mehlhorn, Thomas Alan & Trucano, Timothy Guy
Object Type:
Report
System:
The UNT Digital Library
Algorithm and simulation development in support of response strategies for contamination events in air and water systems.
Chemical/Biological/Radiological (CBR) contamination events pose a considerable threat to our nation's infrastructure, especially in large internal facilities, external flows, and water distribution systems. Because physical security can only be enforced to a limited degree, deployment of early warning systems is being considered. However to achieve reliable and efficient functionality, several complex questions must be answered: (1) where should sensors be placed, (2) how can sparse sensor information be efficiently used to determine the location of the original intrusion, (3) what are the model and data uncertainties, (4) how should these uncertainties be handled, and (5) how can our algorithms and forward simulations be sufficiently improved to achieve real time performance? This report presents the results of a three year algorithmic and application development to support the identification, mitigation, and risk assessment of CBR contamination events. The main thrust of this investigation was to develop (1) computationally efficient algorithms for strategically placing sensors, (2) identification process of contamination events by using sparse observations, (3) characterization of uncertainty through developing accurate demands forecasts and through investigating uncertain simulation model parameters, (4) risk assessment capabilities, and (5) reduced order modeling methods. The development effort was focused on water distribution systems, large internal facilities, …
Date:
January 1, 2006
Creator:
Waanders, Bart Van Bloemen
Object Type:
Report
System:
The UNT Digital Library
Analysis: Economic Impacts of Wind Applications in Rural Communities; June 18, 2004 -- January 31, 2005
The purpose of this report is to compile completed studies on the economic impact of wind farms in rural communities and then to compare these studies. By summarizing the studies in an Excel spreadsheet, the raw data from a study is easily compared with the data from other studies. In this way, graphs can be made and conclusions drawn. Additionally, the creation of a database in which economic impact studies are summarized allows a greater understanding of the type of information gathered in an economic impact study, the type of information that is most helpful in using these studies to promote wind energy development in rural communities, and the limitations on collecting data for these studies.
Date:
January 1, 2006
Creator:
Pedden, M.
Object Type:
Report
System:
The UNT Digital Library
Analysis of B → ωlν Decays With BaBar
As part of the BaBar project at SLAC to study the properties of B mesons, we have carried out a study of the exclusive charmless semileptonic decay mode B → ωlν, which can be used to determine the magnitude of the Cabbibo- Kobayashi-Maskawa matrix element Vub. Using simulated event samples, this study focuses on determining criteria on variables for selection of B → ωlν signal and suppression of background from other types of BB events and continuum processes. In addition, we determine optimal cuts on variables to ensure a good neutrino reconstruction. With these selection cuts, we were able to achieve a signal-to-background ratio of 0.68 and a signal efficiency of the order of 1%. Applying these cuts to a sample of 83 million BB events recorded by BaBar in e+e– collisions at the (4S) resonance, we obtain a yield of 115 ± 19 B → ωlν decays.
Date:
January 1, 2006
Creator:
Chu, Yiwen; Littlejohn, Bryce & Binfelder, J.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Coconut-Derived Biodiesel and Conventional Diesel Fuel Samples from the Philippines: Task 2 Final Report
NREL tested Philippines coconut biodiesel samples of neat and blended fuels. Results show that the current fuel quality standards were met with very few exceptions. Additional testing is recommended.
Date:
January 1, 2006
Creator:
Alleman, T. L. & McCormick, R. L.
Object Type:
Report
System:
The UNT Digital Library
An analysis of the causes of failure in high chrome oxide refractory materials from slagging gasifiers
High Cr2O3 refractory materials are used to line the hot face of slagging gasifiers. Gasifiers are reaction chambers that convert water, oxygen, and a carbon feedstock into CO, H2, and methane at temperatures as high as 1575DGC and pressures up to 1000 psi. Ash in the carbon feedstock liquefies, erodes and corrodes the gasifier's refractory liner, contributing to liner failure within a few months to two years. The failure of a refractory liner decreases a gasifier's on-line availability and causes costly system downtime and repairs. Many factors contribute to refractory lining failure, including slag penetration and corrosion, thermal cycling, gasifier environment, and mechanical loads. The results of refractory post-mortem failure analysis and how observations relate to gasifier service life will be discussed.
Date:
January 1, 2006
Creator:
Bennett, James P.; Kwong, Kyei-Sing; Powell, Cynthia A.; Thomas, Hugh & Krabbe, Rick
Object Type:
Article
System:
The UNT Digital Library
Analysis of the Habitat of Henslow's Sparrows and Grasshopper Sparrows Compared to Random Grassland Areas
ABSTRAC T Henslow’s Sparrows are endangered prairie birds, and Grasshopper Sparrows are considered rare prairie birds. Both of these birds were abundant in Illinois, but their populations have been declining due to loss of the grasslands. This begins an ongoing study of the birds’ habitat so Fermilab can develop a land management plan for the Henslow’s and Grasshoppers. The Henslow’s were found at ten sites and Grasshoppers at eight sites. Once the birds were located, the vegetation at their sites was studied. Measurements of the maximum plant height, average plant height, and duff height were taken and estimates of the percent of grass, forbs, duff, and bare ground were recorded for each square meter studied. The same measurements were taken at ten random grassland sites on Fermilab property. Several t-tests were performed on the data, and it was found that both Henslow’s Sparrows and Grasshopper Sparrows preferred areas with a larger percentage of grass than random areas. Henslow’s also preferred areas with less bare ground than random areas, while Grasshoppers preferred areas with more bare ground than random areas. In addition, Grasshopper Sparrows preferred a lower percentage of forbs than was found in random areas and a shorter average plant …
Date:
January 1, 2006
Creator:
Maier, K.; Walton, R. & Kasper, P.
Object Type:
Article
System:
The UNT Digital Library
Analytic and computational micromechanics of clustering and interphase effects in carbon nanotube composites.
Effective elastic properties for carbon nanotube reinforced composites are obtained through a variety of micromechanics techniques. Using the in-plane elastic properties of graphene, the effective properties of carbon nanotubes are calculated utilizing a composite cylinders micromechanics technique as a first step in a two-step process. These effective properties are then used in the self-consistent and Mori-Tanaka methods to obtain effective elastic properties of composites consisting of aligned single or multi-walled carbon nanotubes embedded in a polymer matrix. Effective composite properties from these averaging methods are compared to a direct composite cylinders approach extended from the work of Hashin and Rosen (1964) and Christensen and Lo (1979). Comparisons with finite element simulations are also performed. The effects of an interphase layer between the nanotubes and the polymer matrix as result of functionalization is also investigated using a multi-layer composite cylinders approach. Finally, the modeling of the clustering of nanotubes into bundles due to interatomic forces is accomplished herein using a tessellation method in conjunction with a multi-phase Mori-Tanaka technique. In addition to aligned nanotube composites, modeling of the effective elastic properties of randomly dispersed nanotubes into a matrix is performed using the Mori-Tanaka method, and comparisons with experimental data are made. …
Date:
January 1, 2006
Creator:
Seidel, Gary D.; Hammerand, Daniel Carl & Lagoudas, Dimitris C. (Texas A&M University, College Station, TX)
Object Type:
Report
System:
The UNT Digital Library
Applicability of Related Data, Algorithms, and Models to the Simulation of Ground-Coupled Residential Hot Water Piping in California
Residential water heating is an important consideration in California?s building energy efficiency standard. Explicit treatment of ground-coupled hot water piping is one of several planned improvements to the standard. The properties of water, piping, insulation, backfill materials, concrete slabs, and soil, their interactions, and their variations with temperature and over time are important considerations in the required supporting analysis. Heat transfer algorithms and models devised for generalized, hot water distribution system, ground-source heat pump and ground heat exchanger, nuclear waste repository, buried oil pipeline, and underground electricity transmission cable applications can be adapted to the simulation of under-slab water piping. A numerical model that permits detailed examination of and broad variations in many inputs while employing a technique to conserve computer run time is recommended.
Date:
January 1, 2006
Creator:
Warner, J. L. & Lutz, J. D.
Object Type:
Report
System:
The UNT Digital Library
Application and Development of Appropriate Tools and Technologies for Cost-Effective Carbon Sequestration
The Nature Conservancy is participating in a Cooperative Agreement with the Department of Energy (DOE) National Energy Technology Laboratory (NETL) to explore the compatibility of carbon sequestration in terrestrial ecosystems and the conservation of biodiversity. The title of the research project is ''Application and Development of Appropriate Tools and Technologies for Cost-Effective Carbon Sequestration''. The objectives of the project are to: (1) improve carbon offset estimates produced in both the planning and implementation phases of projects; (2) build valid and standardized approaches to estimate project carbon benefits at a reasonable cost; and (3) lay the groundwork for implementing cost-effective projects, providing new testing ground for biodiversity protection and restoration projects that store additional atmospheric carbon. This Technical Progress Report discusses preliminary results of the six specific tasks that The Nature Conservancy is undertaking to answer research needs while facilitating the development of real projects with measurable greenhouse gas reductions. The research described in this report occurred between April 1st , 2005 and June 30th, 2005. The specific tasks discussed include: Task 1: carbon inventory advancements; Task 2: emerging technologies for remote sensing of terrestrial carbon; Task 3: baseline method development; Task 4: third-party technical advisory panel meetings; Task 5: new …
Date:
January 1, 2006
Creator:
Stanley, Bill; Gonzalez, Patrick; Brown, Sandra; Henman, Jenny; Kant, Zoe; Murdock, Sarah Woodhouse et al.
Object Type:
Report
System:
The UNT Digital Library
Application of Hydrogen Assisted Lean Operation to Natural Gas-Fueled Reciprocating Engines (HALO)
Two key challenges facing Natural Gas Engines used for cogeneration purposes are spark plug life and high NOx emissions. Using Hydrogen Assisted Lean Operation (HALO), these two keys issues are simultaneously addressed. HALO operation, as demonstrated in this project, allows stable engine operation to be achieved at ultra-lean (relative air/fuel ratios of 2) conditions, which virtually eliminates NOx production. NOx values of 10 ppm (0.07 g/bhp-hr NO) for 8% (LHV H2/LHV CH4) supplementation at an exhaust O2 level of 10% were demonstrated, which is a 98% NOx emissions reduction compared to the leanest unsupplemented operating condition. Spark ignition energy reduction (which will increase ignition system life) was carried out at an oxygen level of 9%, leading to a NOx emission level of 28 ppm (0.13 g/bhp-hr NO). The spark ignition energy reduction testing found that spark energy could be reduced 22% (from 151 mJ supplied to the coil) with 13% (LHV H2/LHV CH4) hydrogen supplementation, and even further reduced 27% with 17% hydrogen supplementation, with no reportable effect on NOx emissions for these conditions and with stable engine torque output. Another important result is that the combustion duration was shown to be only a function of hydrogen supplementation, not a …
Date:
January 1, 2006
Creator:
Smutzer, Chad
Object Type:
Report
System:
The UNT Digital Library
Assessment of the potential for karst in the Rustler Formation at the WIPP site.
This report is an independent assessment of the potential for karst dissolution in evaporitic strata of the Rustler Formation at the Waste Isolation Pilot Plant (WIPP) site. Review of the available data suggests that the Rustler strata thicken and thin across the area in depositional patterns related to lateral variations in sedimentary accommodation space and normal facies changes. Most of the evidence that has been offered for the presence of karst in the subsurface has been used out of context, and the different pieces are not mutually supporting. Outside of Nash Draw, definitive evidence for the development of karst in the Rustler Formation near the WIPP site is limited to the horizon of the Magenta Member in drillhole WIPP-33. Most of the other evidence cited by the proponents of karst is more easily interpreted as primary sedimentary structures and the localized dissolution of evaporitic strata adjacent to the Magenta and Culebra water-bearing units. Some of the cited evidence is invalid, an inherited baggage from studies made prior to the widespread knowledge of modern evaporite depositional environments and prior to the existence of definitive exposures of the Rustler Formation in the WIPP shafts. Some of the evidence is spurious, has been …
Date:
January 1, 2006
Creator:
Lorenz, John Clay
Object Type:
Report
System:
The UNT Digital Library
Atomic scale investigations of the thermal and electron induced chemistry of small molecules on platinum(111) as revealed by scanning tunneling microscopy
The work presented here can be divided into two parts: 1) an experimental and analysis section dealing with the investigation of small molecules such as methyl bromide, carbon dioxide, diatomic nitrogen, methane and methane?s photochemical derivative methyl radical adsorbed onto the Pt(111) surface, and 2) A detailed explanation of the current STM and chamber, with included designs and detailed instructions for operation and maintenance of both the STM and chamber. The investigations of the methyl bromide molecule show interesting dipole-dipole interactions on the Pt(111) surface. With a (6 x 3) lattice being described as the full monolayer that was created by overdosing and annealing to 104 K. The (6 x 3) lattice is shown to occupy top sites and three fold hollow sites on the Pt(111) surface giving rise to a very sharp and symmetrically split ν2 RAIRS mode, and the absence of the ν5 mode in RAIRS is indicative that the molecules are all aligned with their C-Br bond parallel to the surface normal. Additional sub-monolayer structures were observed that had components that were not aligned with the surface normal. The submonolayer lattices ranging from a structured 0.12 ML to a random coverages estimated at 0.20 ML, to a …
Date:
January 1, 2006
Creator:
Schwendemann, Todd Charles
Object Type:
Text
System:
The UNT Digital Library
An Audit Report on the Health and Human Services Commission's Consolidation of Administrative Support Services
Report of the Texas State Auditor's Office related to examining the Health and Human Services Commission's (Commission) consolidation efforts centralizing its administrative support functions and to determine whether the Commission's efforts improved the efficiency and effectiveness of its administrative support services' operations as intended by House Bill 2292, specifically reviewing the implementation of the outsourced human rights management contract, the Commission's consolidation of financial services processes, and the consolidation of information technology services and automated systems.
Date:
January 2006
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History