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93,442 Matching Results

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Results: 1 - 24 of 93,442 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
0.52eV Quaternary InGaAsSb Thermophotovoltaic Diode Technology (open access)

0.52eV Quaternary InGaAsSb Thermophotovoltaic Diode Technology

Thermophotovoltaic (TPV) diodes fabricated from 0.52eV lattice-matched InGaAsSb alloys are grown by Metal Organic Vapor Phase Epitaxy (MOVPE) on GaSb substrates. 4cm{sup 2} multi-chip diode modules with front-surface spectral filters were tested in a vacuum cavity and attained measured efficiency and power density of 19% and 0.58 W/cm{sup 2} respectively at operating at temperatures of T{sub radiator} = 950 C and T{sub diode} = 27 C. Device modeling and minority carrier lifetime measurements of double heterostructure lifetime specimens indicate that diode conversion efficiency is limited predominantly by interface recombination and photon energy loss to the GaSb substrate and back ohmic contact. Recent improvements to the diode include lattice-matched p-type AlGaAsSb passivating layers with interface recombination velocities less than 100 cm/s and new processing techniques enabling thinned substrates and back surface reflectors. Modeling predictions of these improvements to the diode architecture indicate that conversion efficiencies from 27-30% and {approx}0.85 W/cm{sup 2} could be attained under the above operating temperatures.
Date: June 9, 2004
Creator: Dashiell, M. W.; Beausang, J. F.; Nichols, G.; Depoy, D. M.; Danielson, L. R.; Ehsani, H. et al.
Object Type: Report
System: The UNT Digital Library
1.1" Ammunition Hoist - Temporary Hand-Hoisting Gear

1.1" Ammunition Hoist - Temporary Hand-Hoisting Gear

Blueprint depicting technical details of Battleship Texas.
Date: September 9, 1941
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1.5" heavy pressure valve

1.5" heavy pressure valve

Blueprint depicting technical details of Battleship Texas.
Date: May 9, 1912
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
E-1 (9-9-16)

E-1 (9-9-16)

Photograph of Woodcrest Engine 1. This rig was originally owned by the Edmond FD.
Date: September 9, 2016
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History
E-2 (4-9-17)

E-2 (4-9-17)

None
Date: April 9, 2017
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History
2" 50GPM Evaporator Brine Overboard Discharge Pump

2" 50GPM Evaporator Brine Overboard Discharge Pump

Blueprint depicting technical details of Battleship Texas.
Date: September 9, 1941
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
E-2 Boardman (6-9-13)

E-2 Boardman (6-9-13)

Photograph of Lindsay FD E-2, a 1976 Ford/Boardman.
Date: June 9, 2013
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History
2" heavy pressure valve cast steel

2" heavy pressure valve cast steel

Blueprint depicting technical details of Battleship Texas.
Date: December 9, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
2" heavy pressure valve cast steel

2" heavy pressure valve cast steel

Blueprint depicting technical details of Battleship Texas.
Date: December 9, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
3" Combined Feed [Valve]

3" Combined Feed [Valve]

Blueprint depicting technical details of Battleship Texas.
Date: April 9, 1935
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming (open access)

3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming

The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date: September 9, 2002
Creator: La Pointe, Paul R. & Hermanson, Jan
Object Type: Report
System: The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming (open access)

3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming

The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date: September 9, 2002
Creator: Pointe, La; Paul; Parney, Robert; Eiben, Thorsten; Dunleavy, Mike & Whitney, John
Object Type: Report
System: The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming (open access)

3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming

The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date: September 9, 2002
Creator: La Pointe, Paul; Parney, Robert; Eiben, Thorsten; Dunleavy, Mike; Whitney, John & Eubanks, Darrel
Object Type: Report
System: The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming (open access)

3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming

The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date: September 9, 2002
Creator: La Pointe, Paul R.; Hermanson, Jan & Eiben, Thorsten
Object Type: Report
System: The UNT Digital Library
3-D Seismic Exploration Project, Ute Indian Tribe, Uintah and Ouray Reservation, Uintah County, Utah (open access)

3-D Seismic Exploration Project, Ute Indian Tribe, Uintah and Ouray Reservation, Uintah County, Utah

The objectives of this North Hill Creek 3-D seismic survey were to: (1) cover as large an area as possible with available budget; (2) obtain high quality data throughout the depth range of the prospective geologic formations of 2,000' to 12,000' to image both gross structures and more subtle structural and stratigraphic elements; (3) overcome the challenges posed by a hard, reflective sandstone that cropped out or was buried just a few feet below the surface under most of the survey area; and (4) run a safe survey.
Date: September 9, 2002
Creator: Eckels, Marc T.
Object Type: Report
System: The UNT Digital Library
A 3-Dimensional discrete fracture network generator to examine fracture-matrix interaction using TOUGH2 (open access)

A 3-Dimensional discrete fracture network generator to examine fracture-matrix interaction using TOUGH2

Water fluxes in unsaturated, fractured rock involve the physical processes occurring at fracture-matrix interfaces within fracture networks. Modeling these water fluxes using a discrete fracture network model is a complicated effort. Existing preprocessors for TOUGH2 are not suitable to generate grids for fracture networks with various orientations and inclinations. There are several 3-D discrete-fracture-network simulators for flow and transport, but most of them do not capture fracture-matrix interaction. We have developed a new 3-D discrete-fracture-network mesh generator, FRACMESH, to provide TOUGH2 with information about the fracture network configuration and fracture-matrix interactions. FRACMESH transforms a discrete fracture network into a 3 dimensional uniform mesh, in which fractures are considered as elements with unique rock material properties and connected to surrounding matrix elements. Using FRACMESH, individual fractures may have uniform or random aperture distributions to consider heterogeneity. Fracture element volumes and interfacial areas are calculated from fracture geometry within individual elements. By using FRACMESH and TOUGH2, fractures with various inclinations and orientations, and fracture-matrix interaction, can be incorporated. In this paper, results of flow and transport simulations in a fractured rock block utilizing FRACMESH are presented.
Date: April 9, 2003
Creator: Ito, Kazumasa & Yongkoo, Seol
Object Type: Article
System: The UNT Digital Library
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 5, Ed. 1 Monday, May 9, 1977 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 5, Ed. 1 Monday, May 9, 1977

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: May 9, 1977
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 27, Ed. 1 Monday, October 9, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 27, Ed. 1 Monday, October 9, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: October 9, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
E-4 Crew (8-9-92)

E-4 Crew (8-9-92)

None
Date: August 9, 1992
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History
6.70 EV Resonance in U²³⁸ (open access)

6.70 EV Resonance in U²³⁸

"Using the Brookhaven fast chopper, transmission curves were obtained for the 6.70 +/- .06 ev resonance in U238 using four different thicknesses of natural uranium metal." The measurements for the transmission curves are summarized in the table provided.
Date: November 9, 1953
Creator: Levin, Jules S.
Object Type: Report
System: The UNT Digital Library
9-11 Commission Hearing #3, July 9, 2003, Part 1 captions transcript

9-11 Commission Hearing #3, July 9, 2003, Part 1

Recording of the third public hearing held by the National Commission on Terrorist Attacks upon the United States on July 9, 2003 at the Russell Senate Office Building in Washington, D.C. The one-day session focused on "Terrorism, al Qaeda, and the Muslim World." This section includes the first panel on Al Qaeda, with testimony from Rohan Gunaratna and Mamoun Fandy.
Date: July 9, 2003
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Video
System: The UNT Digital Library
9-11 Commission Hearing #3, July 9, 2003, Part 3 captions transcript

9-11 Commission Hearing #3, July 9, 2003, Part 3

Recording of the third public hearing held by the National Commission on Terrorist Attacks upon the United States on July 9, 2003 at the Russel Senate Office Building in Washington, D.C. The one-day session focused on "Terrorism, al Qaeda, and the Muslim World." This section includes a post-hearing media advisory with Chair Thomas H. Kean and Vice Chair Lee H. Hamilton.
Date: July 9, 2003
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Video
System: The UNT Digital Library
9/11 Commission Recommendations: A Civil Liberties Oversight Board (open access)

9/11 Commission Recommendations: A Civil Liberties Oversight Board

Among the recommendations made by the National Commission on Terrorist Attacks Upon the United States (9/11 Commission) in its final report is the creation of a board within the executive branch to oversee adherence to guidelines on, and the commitment to defend, civil liberties by the federal government. This report examines this recommendation and its implications, and will be updated as events warrant.
Date: August 9, 2004
Creator: Relyea, Harold C.
Object Type: Report
System: The UNT Digital Library
E-9 crew (June 9, 1932)

E-9 crew (June 9, 1932)

None
Date: June 9, 1932
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History