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1.06 μm 150 psec laser damage study of diamond turned, diamond turned/ polished and polished metal mirrors

Description: Using a well characterized 1.06 μm 150 ps glass laser pulse the damage characteristics for diamond turned, diamond turned/ polished, and polished copper and silver mirrors less than 5 cm diameter were studied. Although most samples were tested with a normal angle of incidence, some were tested at 45$sup 0$ with different linear polarization showing an increase in damage threshold for S polarization. Different damage mechanisms observed will be discussed. Laser damage is related to residual surface influences of the fabrication process. First attempts to polish diamond turned surfaces resulted in a significant decrease in laser damage threshold. The importance of including the heat of fusion in the one dimensional heat analysis of the theoretical damage threshold and how close the samples came to the theoretical damage threshold is discussed. (auth)
Date: July 24, 1975
Creator: Saito, T. T.; Milam, D.; Baker, P. & Murphy, G.
Partner: UNT Libraries Government Documents Department
open access

3-D HYDRODYNAMIC MODELING IN A GEOSPATIAL FRAMEWORK

Description: 3-D hydrodynamic models are used by the Savannah River National Laboratory (SRNL) to simulate the transport of thermal and radionuclide discharges in coastal estuary systems. Development of such models requires accurate bathymetry, coastline, and boundary condition data in conjunction with the ability to rapidly discretize model domains and interpolate the required geospatial data onto the domain. To facilitate rapid and accurate hydrodynamic model development, SRNL has developed a pre- and post-processor application in a geospatial framework to automate the creation of models using existing data. This automated capability allows development of very detailed models to maximize exploitation of available surface water radionuclide sample data and thermal imagery.
Date: August 24, 2006
Creator: Bollinger, J; Alfred Garrett, A; Larry Koffman, L & David Hayes, D
Partner: UNT Libraries Government Documents Department

[3 Wild Stallions outside of the second LSRFA pit-stop]

Description: Photograph of three of the Wild Stallions team members at the second LSRFA pit-stop. They are wearing matching red, orange, and yellow jerseys with flames at the bottom and "Wild Stallions" across the chest. They are also wearing red accessories including a feather boa on their helmets, red butterfly masks, and orange zipties on top of their helmets. One has the number 38 on her helmet.
Date: September 24, 2011
Partner: UNT Libraries Special Collections

[4 Wild Stallions outside of the second LSRFA pit-stop]

Description: Photograph of three of the Wild Stallions team members at the second LSRFA pit-stop. They are wearing matching red, orange, and yellow jerseys with flames at the bottom and "Wild Stallions" across the chest. They are also wearing red accessories including a feather boa, red butterfly masks, and orange zipties on top of their helmets, a Nike tank top, tutus, and socks. One has the number 38 on her helmet.
Date: September 24, 2011
Partner: UNT Libraries Special Collections
captions transcript

9-11 Commission Hearing #8, March 24, 2004, Part 1

Description: Recording of the eighth public hearing held by the National Commission on Terrorist Attacks upon the United States on March 24, 2004 at the Hart Senate Office Building in Washington, D.C. The two-day hearing investigated the formulation and conduct of U.S. counterterrorism policy, with particular emphasis on the period from the August 1998 embassy bombings to September 11, 2001. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the staff statement on intelligence policy in addition to testimony from George J. Tenet on counterterrorism policy.
Date: March 24, 2004
Duration: 2 hours 12 minutes 54 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #8, March 24, 2004, Part 2

Description: Recording of the eighth public hearing held by the National Commission on Terrorist Attacks upon the United States on March 24, 2004 at the Hart Senate Office Building in Washington, D.C. The two-day hearing investigated the formulation and conduct of U.S. counterterrorism policy, with particular emphasis on the period from the August 1998 embassy bombings to September 11, 2001. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the staff statement on national policy coordination in addition to testimony from Samuel R. Berger.
Date: March 24, 2004
Duration: 2 hours 3 minutes 46 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #8, March 24, 2004, Part 3

Description: Recording of the eighth public hearing held by the National Commission on Terrorist Attacks upon the United States on March 24, 2004 at the Hart Senate Office Building in Washington, D.C. The two-day hearing investigated the formulation and conduct of U.S. counterterrorism policy, with particular emphasis on the period from the August 1998 embassy bombings to September 11, 2001. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes testimony from Richard A. Clarke, former National Coordinator for Counterterrorism, National Security Council.
Date: March 24, 2004
Duration: 2 hours 14 minutes 44 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Partner: UNT Libraries Government Documents Department
captions transcript

9-11 Commission Hearing #8, March 24, 2004, Part 4

Description: Recording of the eighth public hearing held by the National Commission on Terrorist Attacks upon the United States on March 24, 2004 at the Hart Senate Office Building in Washington, D.C. The two-day hearing investigated the formulation and conduct of U.S. counterterrorism policy, with particular emphasis on the period from the August 1998 embassy bombings to September 11, 2001. In addition to witness testimony, four staff statements were delivered during the course of the proceedings This section includes the testimony from Richard L. Armitage, and concludes the hearing.
Date: March 24, 2004
Duration: 1 hour 24 minutes 56 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Partner: UNT Libraries Government Documents Department
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes: Final Report

Description: Improved ground-imaging capabilities have enormous potential to increase energy, environmental, and economic benefits by improving exploration accuracy and reducing energy consumption during the mining cycle. Seismic tomography has been used successfully to monitor and evaluate geologic conditions ahead of a mining face. A primary limitation to existing seismic tomography, however, is the placement of sensors. The goal of this project is to develop an array of 24 seismic sensors capable of being mounted in either a vertical or horizontal borehole. Development of this technology reduces energy usage in excavation, transportation, ventilation, and processing phases of the mining operation because less waste is mined and the mining cycle suffers fewer interruptions. This new technology benefits all types of mines, including metal/nonmetal, coal, and quarrying. The primary research tasks focused on sensor placement method, sensor housing and clamping design, and cabling and connector selection. An initial design is described in the report. Following assembly, a prototype was tested in the laboratory as well as at a surface stone quarry. Data analysis and tool performance were used for subsequent design modifications. A final design is described, of which several components are available for patent application. Industry partners have shown clear support for this research and demonstrated an interest in commercialization following project completion.
Date: October 24, 2003
Creator: Westman, Erik C.
Partner: UNT Libraries Government Documents Department
open access

103-06A - A6 - Base Input Army - Rock Island Arsenal -IL Department of the Army Civilan Human Resources Agency North Central Regio.pdf

Description: Base Input - Department of the Army Civilian Human Resources Agency North central Region, Rock Island Arsenal, Illinois. Briefing containing Organization & Structure, Mission & Customers, BRAC recommendation, customer impact, key factors and conclusions.
Date: June 24, 2005
Partner: UNT Libraries Government Documents Department
open access

103-06A - A6 - Base Input Army - Rock Island Arsenal- IL.pdf

Description: Base Input - Briefing for Tank-Automotive & Armaments Command Rock Island Arsenal, which includes purpose of briefing, overview of command, past BRAC actions, community issues, and summary. Also, the magazine Government Executive was sent with an article about the site.
Date: June 24, 2005
Partner: UNT Libraries Government Documents Department
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