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4,851 Matching Results
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Construction of High-Performance, Low-Cost Photoelectrodes with Controlled Polycrystalline Architectures
The major goal of our research was to gain the ability in electrochemical synthesis to precisely control compositions and morphologies of various oxide-based polycrystalline photoelectrodes in order to establish the composition-morphology-photoelectrochemical property relationships while discovering highly efficient photoelectrode systems for use in solar energy conversion. Major achievements include: development of porous n-type BiVO{sub 4} photoanode for efficient and stable solar water oxidation; development of p-type CuFeO{sub 2} photocathode for solar hydrogen production; and junction studies on electrochemically fabricated p-n Cu{sub 2}O homojunction solar cells for efficiency enhancement.
Date:
June 30, 2013
Creator:
Choi, Kyoung-Shin
Object Type:
Report
System:
The UNT Digital Library
Terrorist Watch List Screening and Background Checks for Firearms
This report examines potential policy issues that could arise under the Terror Gap proposal. For context, a basic overview of the U.S. government's post-9/11 terrorist watchlist procedures is provided, as well as an analysis of the Terror Gap proposal, which has been reintroduced in the 113th Congress.
Date:
May 1, 2013
Creator:
Krouse, William J.
Object Type:
Report
System:
The UNT Digital Library
Texas Criminal Pattern Jury Charges: Intoxication and Controlled Substances
Guide listing pattern jury charges to assist the bench and bar in preparing the court's charge for the jury in the state of Texas, including general instructions for the guilt/innocence and punishment stages of the trial, and instructions related to special cases. Indexes to statutes and rules cited, cases cited, and subjects start on page 359.
Date:
2013
Creator:
State Bar of Texas. Committee on Pattern Jury Charges---Criminal.
Object Type:
Book
System:
The Portal to Texas History
Mexico’s Drug Trafficking Organizations: Source and Scope of the Violence
This report details drug trafficking in Mexico and how it has altered. It also delves into the violence of the drug organizations, and depicts possible ways to reduce the violence.
Date:
April 15, 2013
Creator:
Beittel, June S.
Object Type:
Report
System:
The UNT Digital Library
Protecting Defense Technologies: DOD Assessment Needed to Determine Requirement for Critical Technologies List
A letter report issued by the Government Accountability Office with an abstract that begins "While the Department of Defense (DOD) took steps to address previously identified weaknesses in updating and maintaining the Militarily Critical Technologies List (MCTL), the list remains outdated and updates have ceased. For example, DOD has solicited users' requirements and feedback on the MCTL, and added a search engine capability to improve navigation of the list and updated each technology section at least once. DOD also determined the list's purpose is to support export control decisions and in October 2008, issued an instruction that (1) recognized the list's usefulness for other DOD programs and activities and (2) outlined the roles, responsibilities, and procedures for updating and maintaining the list. However, in 2011, DOD cut funding for the program from $4 million in prior years to about $1.5 million and ceased MCTL content updates. Subsequently, DOD removed the public version of the list from the Internet, and officials posted a disclaimer for the restricted version noting that the list should only be used for informational purposes as it had not been updated. Similarly, the compendium of emerging technologies is outdated and two sections have not been updated since …
Date:
January 23, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
2020 Census: Bureau Needs to Improve Scheduling Practices to Enhance Ability to Meet Address List Development Deadlines
A letter report issued by the Government Accountability Office with an abstract that begins "The Census Bureau (Bureau) is not producing reliable schedules for the two programs most relevant to building the Master Address File (MAF)--the 2020 Research and Testing program and the Geographic Support System Initiative."
Date:
November 21, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Superfund: EPA Should Take Steps to Improve Its Management of Alternatives to Placing Sites on the National Priorities List
A letter report issued by the Government Accountability Office with an abstract that begins "The Environmental Protection Agency (EPA) most commonly addresses the cleanup of sites it has identified as eligible for the National Priorities List (NPL) by deferring oversight of the cleanup to approaches outside of the Superfund program. As of December 2012, of the 3,402 sites EPA identified as potentially eligible, EPA has deferred oversight of 1,984 sites to approaches outside the Superfund program, including 1,766 Other Cleanup Activity (OCA) deferrals to states and other entities. However, EPA has not issued guidance for OCA deferrals as it has for the other cleanup approaches. Moreover, EPA's program guidance does not clearly define each type of OCA deferral or specify in detail the documentation EPA regions should have to support their decisions on OCA deferrals. Without clearer guidance on OCA deferrals, EPA cannot be reasonably assured that its regions are consistently tracking these sites or that their documentation will be appropriate or sufficient to verify that these sites have been deferred or have completed cleanup. Under the Superfund program, EPA oversees the cleanup of 1,313 sites on the NPL, 67 sites under the Superfund Alternative (SA) approach, and at least …
Date:
April 9, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
International Linear Collider Technical Design Report - Volume 2: Physics
None
Date:
September 23, 2013
Creator:
Baer, Howard; Barklow, Tim; Fujii, Keisuke; Gao, Yuanning; Hoang, Andre; Kanemura, Shinya et al.
Object Type:
Report
System:
The UNT Digital Library
Effect of Retting on Surface Chemistry and Mechanical Performance Interactions in Natural Fibers for High Performance Polymer Composites
Sustainability through replacement of non-renewable fibers with renewable fibers is an ecological need. Impact of transportation costs from South-east Asia on the life cycle analysis of the composite is detrimental. Kenaf is an easily grown crop in America. Farm based processing involves placing the harvested crop in rivers and ponds, where retting of the fibers from the plant (separation into fibers) can take 2 weeks or more. The objective of this thesis is to analyze industrially viable processes for generating fibers and examine their synergistic impact on mechanical performance, surface topography and chemistry for functional composites. Comparison has been made with commercial and conventional retting process, including alkali retting, enzymatic retting, retting in river and pond water (retting occurs by natural microbial population) with controlled microbial retting. The resulting kenaf fibers were characterized by dynamic mechanical analysis (DMA), Raman spectroscopy (FT-Raman), Fourier transform infrared spectroscopy (FT-IR), polarized optical microscopy (POM), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) optical fluorescence microscopy, atomic force microscopy (AFM) and carbohydrate analysis. DMA results showed that pectinase and microbe treated fibers have superior viscoelastic properties compared to alkali retting. XPS, Raman, FT-IR and biochemical analysis indicated that the controlled microbial and pectinase retting was …
Date:
May 2013
Creator:
Ramesh, Dinesh
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Defining And Characterizing Sample Representativeness For DWPF Melter Feed Samples
Representative sampling is important throughout the Defense Waste Processing Facility (DWPF) process, and the demonstrated success of the DWPF process to achieve glass product quality over the past two decades is a direct result of the quality of information obtained from the process. The objective of this report was to present sampling methods that the Savannah River Site (SRS) used to qualify waste being dispositioned at the DWPF. The goal was to emphasize the methodology, not a list of outcomes from those studies. This methodology includes proven methods for taking representative samples, the use of controlled analytical methods, and data interpretation and reporting that considers the uncertainty of all error sources. Numerous sampling studies were conducted during the development of the DWPF process and still continue to be performed in order to evaluate options for process improvement. Study designs were based on use of statistical tools applicable to the determination of uncertainties associated with the data needs. Successful designs are apt to be repeated, so this report chose only to include prototypic case studies that typify the characteristics of frequently used designs. Case studies have been presented for studying in-tank homogeneity, evaluating the suitability of sampler systems, determining factors that …
Date:
October 29, 2013
Creator:
Shine, E. P. & Poirier, M. R.
Object Type:
Report
System:
The UNT Digital Library
Physiology and Genetics of Biogenic Methane-Production from Acetate
Biomass conversion catalyzed by methanogenic consortia is a widely available, renewable resource for both energy production and waste treatment. The efficiency of this process is directly dependent upon the interaction of three metabolically distinct groups of microorganisms; the fermentative and acetogenic Bacteria and the methanogenic Archaea. One of the rate limiting steps in the degradation of soluble organic matter is the dismutation of acetate, a predominant intermediate in the process, which accounts for 70 % or more of the methane produced by the methanogens. Acetate utilization is controlled by regulation of expression of carbon monoxide dehydrogensase (COdh), which catalyzes the dismutation of acetate. However, physiological and molecular factors that control differential substrate utilization have not been identified in these Archaea. Our laboratory has identified sequence elements near the promoter of the gene (cdh) encoding for COdh and we have confirmed that these sequences have a role in the in vivo expression of cdh. The current proposal focuses on identifying the regulatory components that interact with DNA and RNA elements, and identifying the mechanisms used to control cdh expression. We will determine whether expression is controlled at the level of transcription or if it is mediated by coordinate interaction of transcription …
Date:
April 4, 2013
Creator:
Sowers, Kevin R
Object Type:
Report
System:
The UNT Digital Library
SINGLE-FACED GRAYQB{trademark} - A RADIATION MAPPING DEVICE
GrayQb{trademark} is a novel technology that has the potential to characterize radioactively contaminated areas such as hot cells, gloveboxes, small and large rooms, hallways, and waste tanks. The goal of GrayQb{trademark} is to speed the process of decontaminating these areas, which reduces worker exposures and promotes ALARA considerations. The device employs Phosphorous Storage Plate (PSP) technology as its primary detector material. PSPs, commonly used for medical applications and non-destructive testing, can be read using a commercially available scanner. The goal of GrayQb{trademark} technology is to locate, quantify, and identify the sources of contamination. The purpose of the work documented in this report was to better characterize the performance of GrayQb{trademark} in its ability to present overlay images of the PSP image and the associated visual image of the location being surveyed. The results presented in this report are overlay images identifying the location of hot spots in both controlled and field environments. The GrayQb{trademark} technology has been mainly tested in a controlled environment with known distances and source characteristics such as specific known radionuclides, dose rates, and strength. The original concept for the GrayQb{trademark} device involved utilizing the six faces of a cube configuration and was designed to be positioned …
Date:
December 12, 2013
Creator:
Mayer, J.; Farfan, E.; Immel, D.; Phillips, M.; Bobbitt, J. & Plummer, J.
Object Type:
Report
System:
The UNT Digital Library
Grid integrated distributed PV (GridPV).
This manual provides the documentation of the MATLAB toolbox of functions for using OpenDSS to simulate the impact of solar energy on the distribution system. The majority of the functions are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in the OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feeder on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions. Each function in the toolbox is documented with the function use syntax, full description, function input list, function output list, example use, and example output.
Date:
August 1, 2013
Creator:
Reno, Matthew J. & Coogan, Kyle
Object Type:
Report
System:
The UNT Digital Library
Greenhouse Gas Reporting Program
An EPA list of greenhouse gas reports.
Date:
December 10, 2013
Creator:
United States. Environmental Protection Agency.
Object Type:
Dataset
System:
The UNT Digital Library
Issues Facing the 83rd Texas Legislature
A special report describes to serve as a reference guide to issues facing the 83rd Legislature. It is not a comprehensive list of issues, but rather an outline of broad categories and topics of concern that have arisen during the interim. This is not intended to function as an endorsement of any issue by the Senate Research Center.
Date:
January 2013
Creator:
Texas. Legislature. Senate. Research Center.
Object Type:
Report
System:
The Portal to Texas History
Assessment of the impact of the next generation solvent on DWPF melter off-gas flammability
An assessment has been made to evaluate the impact on the DWPF melter off-gas flammability of replacing the current solvent used in the Modular Caustic-Side Solvent Extraction Process Unit (MCU) process with the Next Generation Solvent (NGS-MCU) and blended solvent. The results of this study showed that the concentrations of nonvolatile carbon and hydrogen of the current solvent in the Slurry Mix Evaporator (SME) product would both be about 29% higher than their counterparts of the NGS-MCU and blended solvent in the absence of guanidine partitioning. When 6 ppm of guanidine (TiDG) was added to the effluent transfer to DWPF to simulate partitioning for the NGS-MCU and blended solvent cases and the concentration of Isopar{reg_sign} L in the effluent transfer was controlled below 87 ppm, the concentrations of nonvolatile carbon and hydrogen of the NGS-MCU and blended solvent were still about 12% and 4% lower, respectively, than those of the current solvent. It is, therefore, concluded that as long as the volume of MCU effluent transfer to DWPF is limited to 15,000 gallons per Sludge Receipt and Adjustment Tank (SRAT)/SME cycle and the concentration of Isopar{reg_sign} L in the effluent transfer is controlled below 87 ppm, using the current solvent …
Date:
February 13, 2013
Creator:
Daniel, W. E.
Object Type:
Report
System:
The UNT Digital Library
Innovative Finance: Strategic Research Project
Executive summary providing a list of possible transportation revenue strategies and an overall framework in which to understand them.
Date:
August 2013
Creator:
Texas A & M Transportation Institute
Object Type:
Report
System:
The Portal to Texas History
Getting in step: Engaging stakeholders in Your Watershed 2nd edition
A guide for involving stakeholders in the protection of the watershed environment
Date:
May 2013
Creator:
United States. Environmental Protection Agency. Office of Water.
Object Type:
Book
System:
The UNT Digital Library
Synthetic Drugs: Overview and Issues for Congress
This report discusses the federal scheduling of controlled substances, including the temporary scheduling of substances. It also provides an overview of current trends in selected synthetic cannabinoids and stimulants. It concludes with a review of relevant legislation as well as possible issues policymakers might consider.
Date:
September 16, 2013
Creator:
Sacco, Lisa N. & Finklea, Kristin M.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Gas Solid Fluidized Bed Dynamics with Non-Spherical Particles
One of the largest challenges for 21st century is to fulfill global energy demand while also reducing detrimental impacts of energy generation and use on the environment. Gasification is a promising technology to meet the requirement of reduced emissions without compromising performance. Coal gasification is not an incinerating process; rather than burning coal completely a partial combustion takes place in the presence of steam and limited amounts of oxygen. In this controlled environment, a chemical reaction takes place to produce a mixture of clean synthetic gas. Gas-solid fluidized bed is one such type of gasification technology. During gasification, the mixing behavior of solid (coal) and gas and their flow patterns can be very complicated to understand. Many attempts have taken place in laboratory scale to understand bed hydrodynamics with spherical particles though in actual applications with coal, the particles are non-spherical. This issue drove the documented attempt presented here to investigate fluidized bed behavior using different ranges of non-spherical particles, as well as spherical. For this investigation, various parameters are controlled that included particle size, bed height, bed diameter and particle shape. Particles ranged from 355 µm to 1180 µm, bed diameter varied from 2 cm to 7 cm, two …
Date:
June 30, 2013
Creator:
Choudhuri, Ahsan
Object Type:
Report
System:
The UNT Digital Library
An Audit Report on Financial and Operational Processes at Texas State University-San Marcos
Report of the Texas State Auditor's Office related to Texas State University-San Marcos' controls over its financial and operational processes, and to opportunities for improvement in areas such as financial reporting, capital and controlled asset processes, contract management, procurement card purchases, and information technology.
Date:
July 2013
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
Medal of Honor Recipients: 1979-2013
This report covers additions and changes to the list of recipients of the medal since the release of the committee print. The Medal of Honor (MOH) is the nation's highest award for military valor. It is presented by the President in the name of Congress and thus is often called the Congressional Medal of Honor.
Date:
November 8, 2013
Creator:
Leland, Anne
Object Type:
Report
System:
The UNT Digital Library
Medal of Honor Recipients: 1979-2013
This report covers additions and changes to the list of recipients of the medal since the release of the committee print. The Medal of Honor (MOH) is the nation's highest award for military valor. It is presented by the President in the name of Congress and thus is often called the Congressional Medal of Honor.
Date:
May 16, 2013
Creator:
Leland, Anne
Object Type:
Report
System:
The UNT Digital Library
WET-NZ Multi-Mode Wave Energy Converter Advancement Project
The overall objective of the project was to verify the ocean wavelength functionality of the WET-NZ through targeted hydrodynamic testing at wave tank scale and controlled open sea deployment of a 1/2 scale (1:2) experimental device. This objective was accomplished through a series of tasks designed to achieve four specific goals: Wave Tank Testing to Characterize Hydrodynamic Characteristics;  Open-Sea Testing of a New 1:2 Scale Experimental Model;  Synthesis and Analysis to Demonstrate and Confirm TRL5/6 Status;  Market Impact & Competitor Analysis, Business Plan and Commercialization Strategy.
Date:
October 15, 2013
Creator:
Kopf, Steven
Object Type:
Report
System:
The UNT Digital Library