Partner
UNT Libraries Government Documents Department
779
Oklahoma Historical Society
143
UNT Libraries
118
UNT Libraries Special Collections
80
National Museum of the Pacific War/Admiral Nimitz Foundation
46
Sterling Municipal Library
31
Texas Historical Commission
19
Alvin Community College
14
Livingston Municipal Library
10
Archer Public Library
9
59 More
Collection
Office of Scientific & Technical Information Technical Reports
524
Texas Digital Newspaper Program
225
Tocker Foundation Grant
128
Oklahoma Digital Newspaper Program
125
Congressional Research Service Reports
104
UNT Theses and Dissertations
90
Government Accountability Office Reports
88
National Museum of the Pacific War Oral History Collection
46
National Museum of the Pacific War Digital Archive
46
The Baytown Sun
31
114 More
Degree Department
Department of Biological Sciences
12
School of Visual Arts
12
College of Music
11
Department of Behavior Analysis
8
Department of Chemistry
7
Department of Computer Science
5
Computer Science and Engineering
4
Department of Engineering Technology
4
Department of English
4
Department of Teacher Education and Administration
4
21 More
Degree Discipline
Degree Level
Country
States
Decade
Year
Month
1,453 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
1,453
next
Altus Times (Altus, Okla.), Vol. 106, No. 52, Ed. 1 Monday, May 31, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 31, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Sun (Alvin, Tex.), Vol. 114, No. 44, Ed. 1 Monday, May 31, 2004
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
May 31, 2004
Creator:
Schwind, Jim & Looby, Edward
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 182, Ed. 1 Monday, May 31, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 31, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT
Mechanically alloyed oxide dispersion strengthened (ODS) Fe-Cr-Al alloy thin walled tubes and sheets, produced via powder processing and consolidation methodologies, are promising materials for eventual use at temperatures up to 1200 C in the power generation industry, far above the temperature capabilities of conventional alloys. Target end-uses range from gas turbine combustor liners to high aspect ratio (L/D) heat exchanger tubes. Grain boundary creep processes at service temperatures, particularly those acting in the hoop direction, are the dominant failure mechanisms for such components. The processed microstructure of ODS alloys consists of high aspect ratio grains aligned parallel to the tube axis, a result of dominant axial metal flow which aligns the dispersoid particles and other impurities in the longitudinal direction. The dispersion distribution is unaltered on a micro scale by recrystallization thermal treatments, but the high aspect ratio grain shape typically obtained limits transverse grain spacing and consequently the hoop creep response. Improving hoop creep in ODS-alloy components will require understanding and manipulating the factors that control the recrystallization behavior, and represents a critical materials design and development challenge that must be overcome in order to fully exploit the potential of ODS alloys. The objectives of this program are to …
Date:
May 31, 2004
Creator:
Kad, Bimal K.
Object Type:
Report
System:
The UNT Digital Library
Development of a 400 Level 3C Clamped Downhole Seismic Receiver Array for 3D Borehole Seismic Imaging of Gas Reservoirs, Quarterly Report: January 1 - March 31, 2004
Borehole seismology is the highest resolution geophysical imaging technique available today to the oil and gas industry for characterization and monitoring of oil and gas reservoirs. However, the industry's ability to economically do high resolution 3D imaging of deep and complex gas reservoirs using borehole seismology is currently frustrated by the lack of the acquisition technology necessary to record the large volumes of the high frequency, high signal-to-noise-ratio borehole seismic data needed to do 3D imaging. This project takes direct aim at this shortcoming by developing a 400 level 3C clamped downhole seismic receiver array, and accompanying software, for borehole seismic 3D imaging. This large borehole seismic array will remove the technical acquisition barrier for recording the necessary volumes of data to do high resolution 3D VSP or 3D cross well seismic imaging. 3D VSP and long range Cross-Well Seismology (CWS) are two of the borehole seismic techniques that will allow the Gas industry to take the next step in their quest for higher resolution images of the gas reservoirs for the purpose of improving the recovery of the natural gas resources. Today only a fraction of the original Oil or Gas in place is produced when reservoirs are considered …
Date:
May 31, 2004
Creator:
Paulsson, Bjorn N. P.
Object Type:
Report
System:
The UNT Digital Library
Development of Biosurfactant-Mediated Oil Recovery in Model Porous Systems and Computer Simulations of Biosurfactant-Mediated Oil Recovery
Current technology recovers only one-third to one-half of the oil that is originally present in an oil reservoir. Entrapment of petroleum hydrocarbons by capillary forces is a major factor that limits oil recovery (1, 3, 4). Hydrocarbon displacement can occur if interfacial tension (IFT) between the hydrocarbon and aqueous phases is reduced by several orders of magnitude. Microbially-produced biosurfactants may be an economical method to recover residual hydrocarbons since they are effective at low concentrations. Previously, we showed that substantial mobilization of residual hydrocarbon from a model porous system occurs at biosurfactant concentrations made naturally by B. mojavensis strain JF-1 if a polymer and 2,3-butanediol were present (2). In this report, we include data on oil recovery from Berea sandstone experiments along with our previous data from sand pack columns in order to relate biosurfactant concentration to the fraction of oil recovered. We also investigate the effect that the JF-2 biosurfactant has on interfacial tension (IFT). The presence of a co-surfactant, 2,3-butanediol, was shown to improve oil recoveries possibly by changing the optimal salinity concentration of the formulation. The JF-2 biosurfactant lowered IFT by nearly 2 orders of magnitude compared to typical values of 28-29 mN/m. Increasing the salinity increased …
Date:
May 31, 2004
Creator:
McInerney, M.J.; Maudgalya, S.K.; Knapp, R. & Folmsbee, M.
Object Type:
Report
System:
The UNT Digital Library
DEVELOPMENT OF IMPROVED ANAEROBIC GROWTH OF BACILLUS MOJAVENSIS STRAIN JF-2 FOR THE PURPOSE OF IMPROVED ANAEROBIC BIOSURFACTANT PRODUCTION FOR ENHANCED OIL RECOVERY
Our work focuses on the use of microorganisms to recover petroleum hydrocarbons that remain entrapped after current recovery technologies reach their economic limit. Capillary forces between the hydrocarbon and aqueous phases are largely responsible for trapping the hydrocarbons in the pores of the rock and large reductions in the interfacial tension between the hydrocarbon and aqueous phases are needed for hydrocarbon mobilization (1-3, 10, 11). Microorganisms produce a variety of biosurfactants (4), several of which generate the ultra low interfacial tensions needed for hydrocarbon mobilization (4, 5, 8). In particular, the lipopeptide biosurfactant produced by Bacillus mojavensis strain JF-2 reduces the interfacial tension between hydrocarbon and aqueous phases to very low levels (<0.016 mN/m) (8) (9). B. mojavensis JF-2 grows under the environmental conditions found in many oil reservoirs, i. e., anaerobic, NaCl concentrations up to 80 g l{sup -1}, and temperatures up to 45 C (6, 7), making it ideally suited for in situ applications. However, anaerobic growth of B. mojavensis JF-2 was inconsistent and difficult to replicate, which limited its use for in situ applications. Our initial studies revealed that enzymatic digests, such as Proteose Peptone, were required for anaerobic growth of Bacillus mojavensis JF-2. Subsequent purification of …
Date:
May 31, 2004
Creator:
McInerney, M.J.; Folmsbee, M. & Nagle, D.
Object Type:
Report
System:
The UNT Digital Library
Development of Microorganisms With Improved Transport and Biosurfactant Activity for Enhanced Oil Recovery Annual Report
Diverse microorganisms were screened for biosurfactant production and anaerobic growth at elevated salt concentrations to obtain candidates most suitable for microbial oil recovery. Seventy percent of the 205 strains tested, mostly strains of Bacillus mojavensis, Bacillus subtilis, Bacillus licheniformis, and Bacillus sonorensis, produced biosurfactants aerobically and 41% of the strains had biosurfactant activity greater than Bacillus mojavensis JF-2, the current candidate for oil recovery. Biosurfactant activity varied with the percentage of the 3-hydroxy-tetradecanoate isomers in the fatty acid portion of the biosurfactant. Changing the medium composition by incorporation of different precursors of 3-hydroxy tetradecanoate increased the activity of biosurfactant. The surface tension and critical micelle concentration of 15 different, biosurfactant-producing Bacillus strains was determined individually and in combination with other biosurfactants. Some biosurfactant mixtures were found to have synergistic effect on surface tension (e.g. surface tension was lowered from 41 to 31 mN/m in some cases) while others had a synergistic effect on CMD-1 values. We compared the transport abilities of spores from three Bacillus strains using a model porous system to study spore recovery and transport. Sand-packed columns were used to select for spores or cells with the best transport abilities through brine-saturated sand. Spores of Bacillus mojavensis strains …
Date:
May 31, 2004
Creator:
McInerney, M.J.; Youssef, N.; Fincher, T.; Maudgalya, S. K.; Folmsbee, M. J.; Knapp, R. et al.
Object Type:
Report
System:
The UNT Digital Library
DoE Advanced Ceramic Microturbine
In July 2001, Ingersoll-Rand began work on this program. Its objective was to introduce ceramic hot section components into the IR family of microturbines to permit higher operating temperatures and hence improved efficiency. The IR microturbine product line combines a novel application of industrial turbocharger equipment, our commercially successful recuperator, and proven industrial gas turbine design practices. The objective of the joint development program is to combine the high production success of the Si{sub 3}N{sub 4} turbocharger rotors, largely from Japan, with the IR turbocharger-based microturbines. The IR 'Ceramic Microturbine' (CMT) program has been configured to use the most practical ceramic rotor, considering size, geometry, proven manufacturing methods, and physical material limitations Performance predictions indicate that 36% LHV electric conversion efficiency could be attained at a Turbine Inlet Temperature (TIT) of nominally 1000 C. The initial 72kW engine is being designed to have comparable life and costs to our current product The package power rating is expandable to 100kW with this equipment by slightly increasing pressure ratio flow and TIT. This program was initially planned as five major tasks In Task 1 a comprehensive analysis of the state of the art ceramics and their applicability to microturbines was performed Milestone …
Date:
May 31, 2004
Creator:
IR Energy Systems
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, May 31, 2004
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 31, 2004
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Extra Mile Award nomination form for Clarissa A. Carter]
Document nominating Clarissa A. Carter for the Extra Mile Awards, which recognized outstanding people (most often women) in the Dallas LGBT community.
Date:
May 31, 2004
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Geologic Controls of Hydrocarbon Occurrence in the Southern Appalachian Basin in Eastern Tennessee, Southwestern Virginia, Eastern Kentucky, and Southern West Virginia
This report summarizes the second-year accomplishments of a three-year program to investigate the geologic controls of hydrocarbon occurrence in the southern Appalachian basin in eastern Tennessee, southwestern Virginia, eastern Kentucky, and southern West Virginia. The project: (1) employs the petroleum system approach to understand the geologic controls of hydrocarbons; (2) attempts to characterize the T-P parameters driving petroleum evolution; (3) attempts to obtain more quantitative definitions of reservoir architecture and identify new traps; (4) is working with USGS and industry partners to develop new play concepts and geophysical log standards for subsurface correlation; and (5) is geochemically characterizing the hydrocarbons (cooperatively with USGS). Second-year results include: All current milestones have been met and other components of the project have been functioning in parallel toward satisfaction of year-3 milestones. We also have been effecting the ultimate goal of the project in the dissemination of information through presentations at professional meetings, convening a major workshop in August 2003, and the publication of results. Our work in geophysical log correlation in the Middle Ordovician units is bearing fruit in recognition that the criteria developed locally in Tennessee and southern Kentucky have much greater extensibility than anticipated earlier. We have identified a major 60 …
Date:
May 31, 2004
Creator:
Hatcher, Robert D.
Object Type:
Report
System:
The UNT Digital Library
New Heterogeneous Catalysts for the Selective Reduction of NOx under Lean Conditions. Final Report
The original goal of this program was the identification and design of new noble-metal-based catalysts for the selective catalytic reduction of nitric oxide by hydrocarbons under excess oxygen (i.e., ''lean'') conditions (HC-SCR). Work conducted in the first funding cycle of this award (i.e., 1997-2000) was successful in allowing us to develop an understanding of the fundamental surface chemistry taking place during the adsorption and reaction of nitrogen oxides and propylene on the surface of supported noble metal catalysts. Both experimental results collected in our own group as well as molecular simulation results published by Professor Neurock suggested that in order to improve the performance of the Pt catalysts--in terms of the nitrogen selectivity and the temperature window of operation-- it was necessary to introduce a second metal. However, synthesizing such catalysts with the metals of interest (i.e., Pt-Au, Pt-Ru, Pt-Rh, etc.) with some degree of control of the structure and composition of the resulting supported metal particles is in itself a research challenge. Consequently, the bulk of our efforts during the second funding cycle of this award (covered by this report) was shifted to the use of organometallic cluster precursors for the synthesis on novel bimetallic catalysts. During this time …
Date:
May 31, 2004
Creator:
Amiridis, M. D.
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Erick Miller, May 31, 2004
The National Museum of the Pacific War presents an interview with Erick Miller. Miller began learning to fly in 1939. He joined the Royal New Zealand Air Force in 1940, and was sent to Cranfield, England. He piloted the Spitfire and Hurricane aircraft, and shares his experiences through the Battle of Britain. In November of 1940 through early 1941 Miller was posted to a Canadian squadron of Beaufighter airplanes assigned to night fighting in Britain. Their duty was to ward off German bombers as they came over the North Sea. He recalls how thankful he was when the Americans joined in the war effort in Europe. Miller completed additional missions through Le Havre, France, Gibraltar and Africa. He was also assigned to military intelligence work. He remained a pilot through the end of the war.
Date:
May 31, 2004
Creator:
Miller, Erick
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Erick Miller, May 31, 2004
The National Museum of the Pacific War presents an interview with Erick Miller. Miller began learning to fly in 1939. He joined the Royal New Zealand Air Force in 1940, and was sent to Cranfield, England. He piloted the Spitfire and Hurricane aircraft, and shares his experiences through the Battle of Britain. In November of 1940 through early 1941 Miller was posted to a Canadian squadron of Beaufighter airplanes assigned to night fighting in Britain. Their duty was to ward off German bombers as they came over the North Sea. He recalls how thankful he was when the Americans joined in the war effort in Europe. Miller completed additional missions through Le Havre, France, Gibraltar and Africa. He was also assigned to military intelligence work. He remained a pilot through the end of the war.
Date:
May 31, 2004
Creator:
Miller, Erick
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with J. L. Cunningham, May 31, 2004
The National Museum of the Pacific War presents an interview with J L Cunningham. Cunningham joined the Marine Corps in late 1942. He served in combat infantry with the 4th Marine Division, and participated in amphibious assaults in the battles of Saipan, Tinian and Iwo Jima. Cunningham was discharged in late 1945.
Date:
May 31, 2004
Creator:
Cunningham, J. L.
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with J. L. Cunningham, May 31, 2004
The National Museum of the Pacific War presents an interview with J L Cunningham. Cunningham joined the Marine Corps in late 1942. He served in combat infantry with the 4th Marine Division, and participated in amphibious assaults in the battles of Saipan, Tinian and Iwo Jima. Cunningham was discharged in late 1945.
Date:
May 31, 2004
Creator:
Cunningham, J. L.
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Jack Spradlin, May 31, 2004
The National Museum of the Pacific War presents an interview with Jack Spradlin. Spradlin joined the Navy in 1943. He completed gunnery school. Beginning January of 1944, he served aboard the USS Porterfield (DD-682) as a watertender, tending to the fire in the boilers. They escorted convoys from the US to Pearl Harbor, the Marshall Islands, Tinian, Saipan, Guam, Iwo Jima and Okinawa. In early 1945 their ship was hit by a kamikaze, and they traveled back to the US. Spradlin was assigned to USS White Marsh (LSD-8). After the war ended, Spradlin served in the Navy an additional 14 years.
Date:
May 31, 2004
Creator:
Spradlin, Jack
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Jack Spradlin, May 31, 2004
The National Museum of the Pacific War presents an interview with Jack Spradlin. Spradlin joined the Navy in 1943. He completed gunnery school. Beginning January of 1944, he served aboard the USS Porterfield (DD-682) as a watertender, tending to the fire in the boilers. They escorted convoys from the US to Pearl Harbor, the Marshall Islands, Tinian, Saipan, Guam, Iwo Jima and Okinawa. In early 1945 their ship was hit by a kamikaze, and they traveled back to the US. Spradlin was assigned to USS White Marsh (LSD-8). After the war ended, Spradlin served in the Navy an additional 14 years.
Date:
May 31, 2004
Creator:
Spradlin, Jack
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Robert Jackson, May 31, 2004
The National Museum of the Pacific War presents an interview with Robert Jackson. Jackson joined the Navy in 1942. He served as Machinist’s Mate Second Class in the engine room aboard the USS Salt Lake City (CA-25). While aboard the ship, Jackson recalls bombarding and covering landings on 34 islands in the Pacific, including the Solomon Islands, the Philippines, Saipan, Australia, Iwo Jima and Okinawa. He shares his experiences going through a typhoon. In March of 1943 they participated in the Battle of the Komandorski Islands. He was discharged in late 1945.
Date:
May 31, 2004
Creator:
Jackson, Robert
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Robert Jackson, May 31, 2004
The National Museum of the Pacific War presents an interview with Robert Jackson. Jackson joined the Navy in 1942. He served as Machinist’s Mate Second Class in the engine room aboard the USS Salt Lake City (CA-25). While aboard the ship, Jackson recalls bombarding and covering landings on 34 islands in the Pacific, including the Solomon Islands, the Philippines, Saipan, Australia, Iwo Jima and Okinawa. He shares his experiences going through a typhoon. In March of 1943 they participated in the Battle of the Komandorski Islands. He was discharged in late 1945.
Date:
May 31, 2004
Creator:
Jackson, Robert
Object Type:
Text
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 89, No. 219, Ed. 1 Monday, May 31, 2004
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 31, 2004
Creator:
Broaddus, Matthew B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
TREATMENT OF HYDROCARBON, ORGANIC RESIDUE AND PRODUCTION CHEMICAL DAMAGE MECHANISMS THROUGH THE APPLICATION OF CARBON DIOXIDE IN NATURAL GAS STORAGE WELLS
Core specimens and several material samples were collected from two natural gas storage reservoirs. Laboratory studies were performed to characterize the samples that were believed to be representative of a reservoir damage mechanism previously identified as arising from the presence of hydrocarbons, organic residues or production chemicals. A series of laboratory experiments were performed to identify the sample materials, use these materials to damage the flow capacity of the core specimens and then attempt to remove or reduce the induced damage using either carbon dioxide or a mixture of carbon dioxide and other chemicals. Results of the experiments showed that pure carbon dioxide was effective in restoring flow capacity to the core specimens in several different settings. However, in settings involving asphaltines as the damage mechanism, both pure carbon dioxide and mixtures of carbon dioxide and other chemicals provided little effectiveness in damage removal.
Date:
May 31, 2004
Creator:
Pekot, Lawrence J. & Himes, Ron
Object Type:
Report
System:
The UNT Digital Library
Tropical Warm Pool International Cloud Experiment TWP-ICE Cloud and rain characteristics in the Australian Monsoon
The impact of oceanic convection on its environment and the relationship between the characteristics of the convection and the resulting cirrus characteristics is still not understood. An intense airborne measurement campaign combined with an extensive network of ground-based observations is being planned for the region near Darwin, Northern Australia, during January-February, 2006, to address these questions. The Tropical Warm Pool International Cloud Experiment (TWP-ICE) will be the first field program in the tropics that attempts to describe the evolution of tropical convection, including the large scale heat, moisture, and momentum budgets, while at the same time obtaining detailed observations of cloud properties and the impact of the clouds on the environment. The emphasis will be on cirrus for the cloud properties component of the experiment. Cirrus clouds are ubiquitous in the tropics and have a large impact on their environment but the properties of these clouds are poorly understood. A crucial product from this experiment will be a dataset suitable to provide the forcing and testing required by cloud-resolving models and parameterizations in global climate models. This dataset will provide the necessary link between cloud properties and the models that are attempting to simulate them.
Date:
May 31, 2004
Creator:
May, P.T., Jakob, C., and Mather, J.H.
Object Type:
Report
System:
The UNT Digital Library