Partner
UNT Libraries Government Documents Department
1,029
UNT Libraries Special Collections
285
UNT Libraries
249
Oklahoma Historical Society
84
Boyce Ditto Public Library
46
Cowtown Coliseum
40
Brownwood Public Library
27
Ennis Public Library
23
Sterling Municipal Library
23
National Museum of the Pacific War/Admiral Nimitz Foundation
20
71 More
Collection
Texas Digital Newspaper Program
508
Office of Scientific & Technical Information Technical Reports
386
Texas Laws and Resolutions Archive
317
Tocker Foundation Grant
222
The Black Academy of Arts and Letters Records
217
Congressional Research Service Reports
150
UNT Theses and Dissertations
147
Oklahoma Digital Newspaper Program
88
Ladd & Katherine Hancher Library Foundation
84
Texas State Publications
84
120 More
Degree Department
Degree Discipline
Degree Level
Country
Year
Month
Results:
1 - 24 of
2,220
next
The Altus Times (Altus, Okla.), Vol. 114, No. 54, Ed. 1 Friday, May 31, 2013
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 31, 2013
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Assessment of Embrittlement of VHTR Structural Alloys in Impure Helium Environments
The helium coolant in high-temperature reactors inevitably contains low levels of impurities during steady-state operation, primarily consisting of small amounts of H{sub 2}, H{sub 2}O, CH{sub 4}, CO, CO{sub 2}, and N{sub 2} from a variety of sources in the reactor circuit. These impurities are problematic because they can cause significant long-term corrosion in the structural alloys used in the heat exchangers at elevated temperatures. Currently, the primary candidate materials for intermediate heat exchangers are Alloy 617, Haynes 230, Alloy 800H, and Hastelloy X. This project will evaluate the role of impurities in helium coolant on the stress-assisted grain boundary oxidation and creep crack growth in candidate alloys at elevated temperatures. The project team will: • Evaluate stress-assisted grain boundary oxidation and creep crack initiation and crack growth in the temperature range of 500-850°C in a prototypical helium environment. • Evaluate the effects of oxygen partial pressure on stress-assisted grain boundary oxidation and creep crack growth in impure helium at 500°C, 700°C, and 850°C respectively. • Characterize the microstructure of candidate alloys after long-term exposure to an impure helium environment in order to understand the correlation between stress-assisted grain boundary oxidation, creep crack growth, material composition, and impurities in the …
Date:
May 31, 2013
Creator:
Crone, Wendy; Cao, Guoping & Sridhara, Kumar
Object Type:
Report
System:
The UNT Digital Library
B0 Meson Decays to Rho0 K*0, F0 K*0, And Rho- K* , Including Higher K* Resonances
None
Date:
May 31, 2013
Creator:
Lee-Boehm, Corry Louise & U., /Harvard
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 93, No. 109, Ed. 1 Friday, May 31, 2013
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 31, 2013
Creator:
Yanelli, Adam
Object Type:
Newspaper
System:
The Portal to Texas History
Brownwood Bulletin (Brownwood, Tex.), Vol. 113, No. 190, Ed. 1 Friday, May 31, 2013
Weekly newspaper from Brownwood, Texas that includes local, state and national news along with advertising.
Date:
May 31, 2013
Creator:
Stuckly, Derrick
Object Type:
Newspaper
System:
The Portal to Texas History
Budget Control Act: Potential Impact of Sequestration on Health Reform Spending
This report examines how automatic spending reductions triggered by the Budget Control Act (BCA) might affect health reform appropriations acts.
Date:
May 31, 2013
Creator:
Redhead, C. Stephen
Object Type:
Report
System:
The UNT Digital Library
Central Asia: Regional Developments and Implications for U.S. Interests
Report that discusses the current status of Central Asian states and U.S. policy, which has been aimed at facilitating their cooperation with U.S. and NATO stabilization efforts in Afghanistan and their efforts to combat terrorism, proliferation, and trafficking in arms, drugs, and persons.
Date:
May 31, 2013
Creator:
Nichol, Jim
Object Type:
Report
System:
The UNT Digital Library
Climate Change: Various Adaptation Efforts Are Under Way at Key Natural Resource Management Agencies
A letter report issued by the Government Accountability Office with an abstract that begins "Since 2007, the Forest Service, the National Oceanic and Atmospheric Administration (NOAA), the Fish and Wildlife Service, and the National Park Service have taken steps to establish strategic directions for addressing climate change adaptation. For example, the Forest Service developed a strategic framework document that established climate change adaptation as a central agency priority and another document, known as "the roadmap," which identified actions that national forest managers were taking or could take to implement the direction outlined in the framework, including re-vegetating ecosystems that had been affected by fire with plant species that are better adapted to current and future climates. These four agencies have also developed guidance, training, and other tools for managers to use in adapting to climate change. For example, the National Park Service is developing guidance for park-based climate change adaptation plans that includes steps such as identifying conservation targets and conducting vulnerability assessments. The Bureau of Land Management has not established a strategic direction for addressing climate change impacts but is planning to develop a high-level climate change adaptation strategy by the end of the summer 2013. In addition, GAO …
Date:
May 31, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
CO{sub 2} Geologic Storage: Coupled Hydro-Chemo-Thermo-Mechanical Phenomena - From Pore-scale Processes to Macroscale Implications -
Global energy consumption will increase in the next decades and it is expected to largely rely on fossil fuels. The use of fossil fuels is intimately related to CO{sub 2} emissions and the potential for global warming. Geological CO{sub 2} storage aims to mitigate the global warming problem by sequestering CO{sub 2} underground. Coupled hydro-chemo-mechanical phenomena determine the successful operation and long term stability of CO{sub 2} geological storage. This research explores coupled phenomena, identifies different zones in the storage reservoir, and investigates their implications in CO{sub 2} geological storage. In particular, the research: Explores spatial patterns in mineral dissolution and precipitation (comprehensive mass balance formulation); experimentally determines the interfacial properties of water, mineral, and CO{sub 2} systems (including CO{sub 2}-water-surfactant mixtures to reduce the CO{sub 2}- water interfacial tension in view of enhanced sweep efficiency); analyzes the interaction between clay particles and CO{sub 2}, and the response of sediment layers to the presence of CO{sub 2} using specially designed experimental setups and complementary analyses; couples advective and diffusive mass transport of species, together with mineral dissolution to explore pore changes during advection of CO{sub 2}-dissolved water along a rock fracture; upscales results to a porous medium using pore network …
Date:
May 31, 2013
Creator:
Santamarina, J. Carlos
Object Type:
Report
System:
The UNT Digital Library
Copperas Cove Leader-Press (Copperas Cove, Tex.), Vol. 118, No. 69, Ed. 1 Friday, May 31, 2013
Semi-weekly newspaper from Copperas Cove, Texas that includes local, state and national news along with advertising.
Date:
May 31, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Corn Storage Protein - A Molecular Genetic Model
Corn is the highest yielding crop on earth and probably the most valuable agricultural product of the United States. Because it converts sun energy through photosynthesis into starch and proteins, we addressed energy savings by focusing on protein quality. People and animals require essential amino acids derived from the digestion of proteins. If proteins are relatively low in certain essential amino acids, the crop becomes nutritionally defective and has to be supplemented. Such deficiency affects meat and fish production and countries where corn is a staple. Because corn seed proteins have relatively low levels of lysine and methionine, a diet has to be supplemented with soybeans for the missing lysine and with chemically synthesized methionine. We therefore have studied genes expressed during maize seed development and their chromosomal organization. A critical technical requirement for the understanding of the molecular structure of genes and their positional information was DNA sequencing. Because of the length of sequences, DNA sequencing methods themselves were insufficient for this type of analysis. We therefore developed the so-called “DNA shotgun sequencing” strategy, where overlapping DNA fragments were sequenced in parallel and used to reconstruct large DNA molecules via overlaps. Our publications became the most frequently cited ones …
Date:
May 31, 2013
Creator:
Messing, Joachim
Object Type:
Report
System:
The UNT Digital Library
Crosby County News (Ralls, Tex.), Vol. 126, No. 22, Ed. 1 Friday, May 31, 2013
Weekly newspaper from Ralls, Texas that includes local, state and national news along with advertising.
Date:
May 31, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Dallas Voice (Dallas, Tex.), Vol. 30, No. 3, Ed. 1 Friday, May 31, 2013
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:
May 31, 2013
Creator:
Wright, John
Object Type:
Newspaper
System:
The Portal to Texas History
Defense Infrastructure: DOD Should Improve Reporting and Communication on Its Corrosion Prevention and Control Activities
A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) has invested more than $68 million in 80 projects in fiscal years 2005 through 2010 to demonstrate new technology addressing infrastructure-related corrosion, but project managers have not submitted all required reports on the results of these efforts to the Corrosion Policy and Oversight Office (Corrosion Office). The DOD Corrosion Prevention and Mitigation Strategic Plan requires project managers to submit a final report when a project is complete, and submit a follow-on report within two years after the military department implements the technology. As of November 2012, GAO found that project managers had not submitted final reports for 50 of the 80 projects (63 percent) funded in fiscal years 2005 through 2010. Also, project managers had not submitted follow-on reports for 15 of the 41 projects (37 percent) funded in fiscal years 2005 through 2007. GAO found that the Corrosion Offices tracking system lacks key information to help ensure that project managers meet reporting requirements. Furthermore, the Corrosion Office is not fully exercising its authority to identify and implement options or incentives to address funding and other reasons given for not meeting …
Date:
May 31, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Denton Record-Chronicle (Denton, Tex.), Vol. 109, No. 302, Ed. 1 Friday, May 31, 2013
Daily newspaper from Denton, Texas that includes local, state, and national news along with advertising.
Date:
May 31, 2013
Creator:
Cobb, Dawn
Object Type:
Newspaper
System:
The Portal to Texas History
Efficient Regeneration of Physical and Chemical Solvents for CO{sub 2} Capture
The objective of this project was to evaluate the use of composite polymer membranes and porous membrane contactors to regenerate physical and chemical solvents for capture of carbon dioxide (CO{sub 2}) from synthesis gas or flue gas, with the goal of improving the energy efficiency of carbon capture. Both a chemical solvent (typical for a post-combustion capture of CO{sub 2} from flue gas) and a physical solvent (typical for pre- combustion capture of CO{sub 2} from syngas) were evaluated using two bench-scale test systems constructed for this project. For chemical solvents, polytetrafluoroethylene and polypropylene membranes were found to be able to strip CO{sub 2} from a monoethanolamine (MEA) solution with high selectivity without significant degradation of the material. As expected, the regeneration temperature was the most significant parameter affecting the CO{sub 2} flux through the membrane. Pore size was also found to be important, as pores larger than 5 microns lead to excessive pore wetting. For physical solvents, polydimethyl-siloxane (PDMS)-based membranes were found to have a higher CO{sub 2} permeability than polyvinylalcohol (PVOH) based membranes, while also minimizing solvent loss. Overall, however, the recovery of CO{sub 2} in these systems is low – less than 2% for both chemical and …
Date:
May 31, 2013
Creator:
Tande, Brian; Seames, Wayne & Benson, Steve
Object Type:
Report
System:
The UNT Digital Library
The Ennis Daily News (Ennis, Tex.), Ed. 1 Friday, May 31, 2013
Daily newspaper from Ennis, Texas that includes local, state and national news along with advertising.
Date:
May 31, 2013
Creator:
Todaro, Nick
Object Type:
Newspaper
System:
The Portal to Texas History
Exploring the Evolving Landscape of Open Access
Presentation for a workshop at the 2013 Open Access Symposium. This presentation discusses the impact of open access for students, the impact of open access on universities, and the impact of open access on publishing practices.
Date:
May 31, 2013
Creator:
Najmi, Anjum; Helge, Kris & Waugh, Laura
Object Type:
Presentation
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, May 31, 2013
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 31, 2013
Creator:
Bright, James
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Fairbanks Geothermal Energy Project Final Report
The primary objective for the Fairbanks Geothermal Energy Project is to provide another source of base-load renewable energy in the Fairbanks North Star Borough (FNSB). To accomplish this, Chena Hot Springs Resort (Chena) drilled a re-injection well to 2700 feet and a production well to 2500 feet. The re-injection well allows a greater flow of water to directly replace the water removed from the warmest fractures in the geothermal reservoir. The new production will provide access to warmer temperature water in greater quantities.
Date:
May 31, 2013
Creator:
Karl, Bernie
Object Type:
Report
System:
The UNT Digital Library
Filibusters and Cloture in the Senate
None
Date:
May 31, 2013
Creator:
Beth, Richard S. & Heitshusen, Valerie
Object Type:
Report
System:
The UNT Digital Library
FINAL REPORT DE-FG02-07ER15894
One of the greatest technological hurdles to deployment of fuel cells relates to the sluggish activity, low durability and the high cost of the catalysts that are currently employed. For automotive PEM fuel cells to become commercially viable, the Pt-specific power density would need to be reduced to less than 0.2gPt/kW (at cell voltages >0.65 V). This would require the Pt loadings to be less than 0.15 mgPt/cm2MEA within the membrane electrode assembly. This could be achieved by enhancing the catalytic activity at the cathode, thus lowering its overpotential. Various different Pt-alloys have shown 2-4 times enhanced activities over Pt alone but still suffer some of the same durability issues as that of the pure Pt. There is a general loss of active Pt due to dissolution and sintering. While there have been a number of elegant fundamental experimental and theoretical studies on ideal single crystal Pt and Pt alloy surfaces which have helped to elucidate the factors that control the activity, there have been very few fundamental studies focused on the stability, reactivity and durability of well-defined Pt nanoparticles. We carried out ab initio density functional theory together with a novel double reference method that we developed to simulate …
Date:
May 31, 2013
Creator:
Neurock, Matthew
Object Type:
Report
System:
The UNT Digital Library
The GV Tribune (Grandview, Tex.), Vol. 118, No. 22, Ed. 1 Friday, May 31, 2013
Weekly newspaper from Grandview, Texas that includes local, state, and national news along with advertising.
Date:
May 31, 2013
Creator:
Roberts, Janeen
Object Type:
Newspaper
System:
The Portal to Texas History
Improved Flow-Field Structures for Direct Methanol Fuel Cells
The direct methanol fuel cell (DMFC) is ideal if high energy-density liquid fuels are required. Liquid fuels have advantages over compressed hydrogen including higher energy density and ease of handling. Although state-of-the-art DMFCs exhibit manageable degradation rates, excessive fuel crossover diminishes system energy and power density. Although use of dilute methanol mitigates crossover, the concomitant lowering of the gross fuel energy density (GFED) demands a complex balance-of-plant (BOP) that includes higher flow rates, external exhaust recirculation, etc. An alternative approach is redesign of the fuel delivery system to accommodate concentrated methanol. NuVant Systems Inc. (NuVant) will maximize the GFED by design and assembly of a DMFC that uses near neat methanol. The approach is to tune the diffusion of highly concentrated methanol (to the anode catalytic layer) to the back-diffusion of water formed at the cathode (i.e. in situ generation of dilute methanol at the anode layer). Crossover will be minimized without compromising the GFED by innovative integration of the anode flow-field and the diffusion layer. The integrated flow-field-diffusion-layers (IFDLs) will widen the current and potential DMFC operating ranges and enable the use of cathodes optimized for hydrogen-air fuel cells.
Date:
May 31, 2013
Creator:
Gurau, Bogdan
Object Type:
Report
System:
The UNT Digital Library