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79,636 Matching Results

Start Over Access Open Access Day 14th Language English

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Results: 1 - 24 of 79,636 next
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D-0 End Calorimeter Warm Tube/TeV Dry Air Purge (open access)

D-0 End Calorimeter Warm Tube/TeV Dry Air Purge

This Engineering Note studies the design of the Dry Air Purge that is going to flow through the Warm Tube of the End Calorimeter of the D-O Calorimeter. The Tev tubes through the E.C. can be thought of as a cluster of concentric tubes: The Tev tube, the warm (vacuum vessel) tube, 15 layers of superinsulation, the cold (argon vessel) tube, and the Inner Hadronic center support tube. The Dry Air Purge will involve flowing Dry Air through the annular region between the Warm Tube and the Tev Beam Pipe. This air flow is intended to prevent condensation from forming in this region which could turn to ice under cryogenic temperatures. Any ice formed in this gap, could cause serious problems when these tubes are moved. The Air will flow through a Nylon Tube Fitting -1/4-inch I.D. to 1/8-inch male pipe thread (Cole Palmer YB-06465-15) see Drawing MC-295221 (Appendix A). This fitting will be attached to the Nylon 2-inch Tube-Wiper and Seal Assembly which is clamped to the ends of the Warm Tube (Appendix A). This note includes drawings and calculations that explain the setup of the Dry Air Purge and give the required information on the pressure drops through …
Date: August 14, 1991
Creator: Leibfritz, J. R.
Object Type: Report
System: The UNT Digital Library
1.25" light and heavy pressure valve

1.25" light and heavy pressure valve

Blueprint depicting technical details of Battleship Texas.
Date: June 14, 1912
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1.25" light and heavy pressure valve

1.25" light and heavy pressure valve

Blueprint depicting technical details of Battleship Texas.
Date: June 14, 1912
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
2 1/2" x 2" x 2 1/2" Tee

2 1/2" x 2" x 2 1/2" Tee

Blueprint depicting technical details of Battleship Texas.
Date: May 14, 1926
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
3"/50 Cal. AA Battery Control from Mark 51 Directors Fire Control Circuit GH Elementary Wiring Diagram

3"/50 Cal. AA Battery Control from Mark 51 Directors Fire Control Circuit GH Elementary Wiring Diagram

Blueprint depicting technical details of Battleship Texas.
Date: September 14, 1944
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
3-D Experimental Fracture Analysis at High Temperature (open access)

3-D Experimental Fracture Analysis at High Temperature

T*e, which is an elastic-plastic fracture parameter based on incremental theory of plasticity, was determined numerically and experimentally. The T*e integral of a tunneling crack in 2024-T3 aluminum, three point bend specimen was obtained through a hybrid analysis of moire interferometry and 3-D elastic-plastic finite element analysis. The results were verified by the good agreement between the experimentally and numerically determined T*e on the specimen surface.
Date: September 14, 2001
Creator: Jackson, John H. & Kobayashi, Albert S.
Object Type: Report
System: The UNT Digital Library
3-D Microprobe Metrology (open access)

3-D Microprobe Metrology

This report documents the results of a project undertaken to develop an ultra-high-accuracy measurement capability, which is necessary to address a rising trend toward miniaturized mechanical products exhibiting dramatically reduced product tolerances. A significant improvement in measurement capability is therefore required to insure that a 4:1 ratio can be maintained between product tolerances and measurement uncertainty.
Date: October 14, 2008
Creator: Swallow, Kevin
Object Type: Report
System: The UNT Digital Library
3-D Seismic Methods for Geothermal Reservoir Exploration and Assessment--Summary (open access)

3-D Seismic Methods for Geothermal Reservoir Exploration and Assessment--Summary

A wide variety of seismic methods covering the spectrum from DC to kilohertz have been employed at one time or the other in geothermal environments. The reasons have varied from exploration for a heat source to attempting to find individual fractures producing hot fluids. For the purposes here we will assume that overall objective of seismic imaging is for siting wells for successful location of permeable pathways (often fracture permeability) that are controlling flow and transport in naturally fractured reservoirs. The application could be for exploration of new resources or for in-fill/step-out drilling in existing fields. In most geothermal environments the challenge has been to separate the ''background'' natural complexity and heterogeneity of the matrix from the fracture/fault heterogeneity controlling the fluid flow. Ideally one not only wants to find the fractures, but the fractures that are controlling the flow of the fluids. Evaluated in this work is current state-of-the-art surface (seismic reflection) and borehole seismic methods (Vertical Seismic Profiling (VSP), Crosswell and Single Well) to locate and quantify geothermal reservoir characteristics. The focus is on active methods; the assumption being that accuracy is needed for successful well siting. Passive methods are useful for exploration and detailed monitoring for in-fill …
Date: July 14, 2003
Creator: Majer, E. L.
Object Type: Report
System: The UNT Digital Library
[4 Alarm Rooftop Fire]

[4 Alarm Rooftop Fire]

Photograph of firemen dressed in dark coats with helmets scaling a brick wall to survey the smoking damage.
Date: November 14, 1950
Creator: unknown
Object Type: Photograph
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 32, Ed. 1 Monday, November 14, 1977 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 32, Ed. 1 Monday, November 14, 1977

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: November 14, 1977
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 19, Ed. 1 Monday, August 14, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 19, Ed. 1 Monday, August 14, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: August 14, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
6.5" Light Pressure Sea Valve

6.5" Light Pressure Sea Valve

Blueprint depicting technical details of Battleship Texas.
Date: May 14, 1914
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
9-11 Commission Hearing #4, October 14, 2003, Part 1 captions transcript

9-11 Commission Hearing #4, October 14, 2003, Part 1

Recording of the fourth public hearing held by the National Commission on Terrorist Attacks upon the United States on October 14, 2003 at the Russell Senate Office Building in Washington, D.C. The Commission heard testimony from two sets of witnesses on leadership of U.S. intelligence, intelligence and national security policy, and the effectiveness of warning against transnational threats. This section includes the opening statement from Chairman Kean, and the panels on leadership of U.S. intelligence, and intelligence and the national security policy.
Date: October 14, 2003
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Video
System: The UNT Digital Library
9-11 Commission Hearing #4,October 14, 2003, Part 2 captions transcript

9-11 Commission Hearing #4,October 14, 2003, Part 2

Recording of the fourth public hearing held by the National Commission on Terrorist Attacks upon the United States on October 14, 2003 at the Russell Senate Office Building in Washington, D.C. The Commission heard testimony from two sets of witnesses on leadership of U.S. intelligence, intelligence and national security policy, and the effectiveness of warning against transnational threats This section includes the third panel on warning of transnational threats, with testimony from Richard Kerr, Mary O. McCarthy, and John Gannon.
Date: October 14, 2003
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Video
System: The UNT Digital Library
9-11 Commission Hearing #10, April 14, 2004, Part 1 captions transcript

9-11 Commission Hearing #10, April 14, 2004, Part 1

Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 14, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the staff statement on the performance of the intelligence community in addition to the panel on Summer 2001 with testimony from George J. Tenet.
Date: April 14, 2004
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Video
System: The UNT Digital Library
9-11 Commission Hearing #10, April 14, 2004, Part 2 captions transcript

9-11 Commission Hearing #10, April 14, 2004, Part 2

Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 14, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the panel on preventing future attacks inside the United States, with testimony from John O. Brennan, Lieutenant General Patrick M. Hughes, John S. Pistole, and James L. Pavitt.
Date: April 14, 2004
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Video
System: The UNT Digital Library
9-11 Commission Hearing #10, April 14, 2004, Part 3 captions transcript

9-11 Commission Hearing #10, April 14, 2004, Part 3

Recording of the tenth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 14, 2004 in Washington, D.C. The two-day hearing examined the performance of law enforcement and the Intelligence Community prior to September 11 and evaluated post-9/11 reforms in these areas. In addition to witness testimony, four staff statements were delivered during the course of the proceedings. This section includes the staff statement on reforming law enforcement, counterterrorism, and intelligence collection in the United States, in addition to the panel on FBI leadership and initiatives post 9/11 with testimony from Robert S. Muller.
Date: April 14, 2004
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Video
System: The UNT Digital Library
19-electron intermediates in the Ligand Substitution of CpW(CO)3with a Lewis Base (open access)

19-electron intermediates in the Ligand Substitution of CpW(CO)3with a Lewis Base

Odd electron species are important intermediates in organometallic chemistry, participating in a variety of catalytic and electron-transfer reactions which produce stable even-electron products. While electron deficient 17-electron (17e) radicals have been well characterized, the possible existence of short-lived 19-electron (19e) radicals has been a subject of continuing investigation. 19e radicals have been postulated as intermediates in the photochemical ligand substitution and disproportionation reactions of organometallic dimers containing a single metal-metal bond, yet the reactions of these intermediates on diffusion-limited time scales (ns-{micro}s) have never been directly observed. This study resolves the 19e dynamics in the ligand substitution of 17e radicals CpW(CO){sub 3}{sup {sm_bullet}} (Cp = C{sub 5}H{sub 5}) with the Lewis base P(OMe){sub 3}, providing the first complete description 19e reactivity.
Date: December 14, 2005
Creator: Cahoon, James F.; Kling, Matthias F.; Sawyer, Karma R.; Frei,Heinz & Harris, Charles B.
Object Type: Article
System: The UNT Digital Library
45-Day safety screen results for single shell tank 241-AP-106, liquid grab samples, riser 1, 30{degrees} and 150{degrees} in conjunction with evaporator campaign 95-1 (open access)

45-Day safety screen results for single shell tank 241-AP-106, liquid grab samples, riser 1, 30{degrees} and 150{degrees} in conjunction with evaporator campaign 95-1

This is the 45-Day report for the fiscal year 1995 safety screening characterization of three liquid grab samples from single shell tank 241-AP-106. The required analyses are differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA) and appearance (APPR). No analytes exceeded the notification limits, therefore, secondary analyses (RSST, cyanide, and hot persulfate-total organic carbon) were not required. Summary data tables 2, 3 and 4 present the appearance, DSC and TGA data, respectively. Total alpha analyses are not included in this report, because it is not required for liquid grab samples.
Date: December 14, 1994
Creator: Miller, G. L.
Object Type: Report
System: The UNT Digital Library
50 B Complex

50 B Complex

Photograph of the 50 B Comples-mixed clay and loams range site. Excellent condition, moderate utilization. Claypen on left, loamy on right.
Date: July 14, 1960
Creator: Fry, Chester
Object Type: Photograph
System: The Gateway to Oklahoma History
The $50 Billion Threshold in the Dodd-Frank Act: Key Findings (open access)

The $50 Billion Threshold in the Dodd-Frank Act: Key Findings

This report provides an overview key findings from the newly issued CRS Report R45036, Bank Systemic Risk Regulation: The $50 Billion Threshold in the Dodd-Frank Act. It includes some background information and a list of bills that may also affect the legislation.
Date: December 14, 2017
Creator: Labonte, Marc & Perkins, David W.
Object Type: Report
System: The UNT Digital Library
53 Per, slow, and Be star pulsations. Lecture 8 (open access)

53 Per, slow, and Be star pulsations. Lecture 8

Spectral variations of the class of variable stars that seems to have no radial pulsations at all are discussed. Models of the rotation of these stars are considered. (GHT)
Date: March 14, 1983
Creator: Cox, A. N.
Object Type: Article
System: The UNT Digital Library
.71-Mile Single Field Drain

.71-Mile Single Field Drain

Photograph of a .71-mile single field drain built in 1957 that drains 60 acres of cropland. The back of the photograph proclaims, "Single field drain built 1957. Drains 60 acres of cropland. It is .71 mile long. Shows good shaping and spoil spreading with farm equipment."
Date: May 14, 1958
Creator: Mackey, Carl E.
Object Type: Photograph
System: The Gateway to Oklahoma History
100 Areas: (For Technical Progress Letter No. 101), June 4--10 (open access)

100 Areas: (For Technical Progress Letter No. 101), June 4--10

None
Date: June 14, 1946
Creator: Jordan, W. E.
Object Type: Report
System: The UNT Digital Library