Partner
UNT Libraries Special Collections
103
UNT Libraries Government Documents Department
96
Oklahoma Historical Society
60
Sterling Municipal Library
11
Carl Albert Congressional Research and Studies Center
8
UNT Libraries
8
Alvin Community College
6
Comanche Public Library
6
National WASP WWII Museum
5
Nellie Pederson Civic Library
4
55 More
Collection
Texas Digital Newspaper Program
129
KXAS-NBC 5 News Collection
87
Oklahoma Digital Newspaper Program
70
Office of Scientific & Technical Information Technical Reports
66
Tocker Foundation Grant
58
Chickasha Newspaper Collection
17
Congressional Research Service Reports
15
Abilene Library Consortium
12
Altus Times-Democrat
11
The Baytown Sun
11
93 More
Serial/Series Title
Degree Department
Country
States
Year
Month
Day
Language
Relocation of Gulf of Aqaba earthquakes using the JSOP Bulletin
Ground truth information (i.e. precise information about the hypocenter and origin time of aseismic event) is difficult to obtain in the Middle East and North Africa region. One source of ground truth we are attempting to exploit is data from local seismic networks. An electronic bulletin from the second phase of the Joint Seismic Observation Period (JSOP), with participating countries in the eastern Mediterranean region, provides a source of local network data not ordinarily available. I have used JSOP bulletin data for the period January 1996 through June 1996 to relocate over 100 earthquakes occurring in and around the Gulf of Aqaba. Fourteen of these earthquakes have picks in the bulletin for stations surrounding the Gulf (Egypt Saudi Arabia, Israel,and Jordan). The rest of the data involves picks for stations either in Israel, Jordan, and Saudi Arabia (east side and north of the Gulf) or for stations in Israel, Jordan, and Egypt (west side and north of the Gulf). The VELEST code (Joint Hypocenter Determination method) was used to calculate improved locations (over what can be obtained from single event determinations--SED with poor station configurations) for the all the earthquakes in the data set. Location differences between the JHD solution …
Date:
July 3, 1997
Creator:
Sweeney, J. J.
Object Type:
Article
System:
The UNT Digital Library
Removal of NOx from diesel generator exhaust by pulsed electron beams
The objective of this paper is to determine the effects of electron beam pulse parameters on the utilization of the reactive free radicals for removal of NO{sub x} from diesel generator exhaust. A dose per pulse less than 1 kGy has been determined to be optimum for effective radical utilization. During each post-pulse period, the radicals are utilized in the removal of NO{sub x} in a timescale of around 100 microseconds; thus, with pulse frequencies of around 10 kHz or less, the radical concentrations remain sufficiently low to prevent any significant competition between radical-pollutant and radical-radical reactions. It is shown that a pulsed electron beam reactor, operating with a dose per pulse of less than 1 kGy/pulse and pulse repetition rate of less than 10 kHz, will have the same plasma chemistry efficiency (parts per million of removed NO{sub x} per kGy of electron beam dose) as an electron beam reactor operating with a low dose rate of 50 kGy/s in continuous mode. Ozone accumulation is a limiting factor under high pulse frequency conditions. The total dose requirement determines the optimum combination of dose per pulse and pulse frequency for both radical utilization and prevention of ozone buildup.
Date:
July 3, 1997
Creator:
Penetrante, B. M.
Object Type:
Article
System:
The UNT Digital Library
Repository seals requirement study
The Yucca Mountain Site Characterization Project, managed by the Civilian Radioactive Waste Management System (CRWMS) Management and Operating Contractor (M and O) is conducting investigations to support the Viability Assessment and the License Application for a high-level nuclear waste repository at Yucca Mountain, Nevada. The sealing subsystem is part of the Yucca Mountain Waste Isolation System. The Yucca Mountain Site Characterization Project is currently evaluating the role of the sealing subsystem (shaft, ramp and exploratory borehole seals) in achieving the overall performance objectives for the Waste Isolation System. This report documents the results of those evaluations. The objective of the study is to provide water or air flow performance based requirements for shafts, ramps, and exploratory boreholes located near the repository. Recommendations, as appropriate, are provided for developing plans, seals component testing, and other studies relating to sealing.
Date:
November 3, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Repository seals requirements study
The Yucca Mountain Site Characterization Project, managed by the Civilian Radioactive Waste Management System (CRWMS) Management and Operating Contractor (M and O) is conducting investigations to support the Viability Assessment and the License Application for a high-level nuclear waste repository at Yucca Mountain, Nevada. The sealing subsystem is part of the Yucca Mountain Waste Isolation System. The Yucca Mountain Site Characterization Project is currently evaluating the role of the sealing subsystem (shaft, ramp and exploratory borehole seals) in achieving the overall performance objectives for the Waste Isolation System. This report documents the results of those evaluations. This report presents the results of a repository sealing requirements study. Sealing is defined as the permanent closure of the shafts, ramps, and exploratory boreholes. Sealing includes those components that would reduce potential inflows above the repository, or that would divert flow near the repository horizon to allow vertical infiltration to below the repository. Sealing of such features as emplacement drifts was not done in this study because the current capability to calculate fracture flow into the drifts is not sufficiently mature. The objective of the study is to provide water or air flow performance based requirements for shafts, ramps, and exploratory boreholes located …
Date:
November 3, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Residual stresses in weld overlay tubes: A finite element study
Residual stresses and strains in a tube with circumferential weld overlay were analyzed by the finite element (FE) method. The objective of this work was to develop and verify a FE model, to determine the magnitude and distribution of residual stresses in the weld overlay tube, and to evaluate the significance of two contributing factors to residual stress: (1) difference in material properties between tube and weld material, and (2) thermal gradients in the weld. An axisymmetric FE model was developed to simulate the circumferential two-layer welding process of alloy 625 overlay on SA210 tube. The first layer was modeled as a gas metal arc welding process with filler metal, whereas the autogenous gas tungsten arc welding process was modeled for the second layer. Neutron diffraction technique was used to experimentally determine residual elastic strains in the weld overlay tube. Comparison with the FE results shows overall good agreement. Both the experimental and FE results show high compressive stresses at the inside tube surface and high tensile stresses in the weld overlay. This suggests that weld overlay may be used to relieve tensile or produce compressive stresses at the inside tube surface, which is significant for applications where crack initiation …
Date:
January 3, 1997
Creator:
Taljat, B.; Zacharia, T.; Wang, X. L.; Keiser, J. R.; Feng, Z. & Jirinec, M. J.
Object Type:
Report
System:
The UNT Digital Library
Results of fracture mechanics analyses of the Ederer cranes in the Device Assembly Facility: The effect of using a general expression for fatigue crack growth of the crane material
The subject analyses were conducted on 3 critical locations on the lower flange of the load-beam of the Ederer 5 ton and 4 ton cranes in the D.A.F. facility. An expression for the fatigue-crack growth behavior of ferritic-pearlitic constructional steels (``Barsom Equation``) was used in place of the previously used equation to describe fatigue-crack growth behavior in this steel (base-line equation) to evaluate the effects of varying the fatigue-crack growth rate. Results appear that: (1) Propagation of a 1/4-in. long flaw, previously undetected by NDE, to a length sufficient to cause failure of either flange, should not occur in at least 70.8 times the postulated operating scenario, down from 104 times as calculated using the base line equation. (2) Should each crane undergo annual inspection, any surface flaw with a length greater than 1.10 in. should be removed and repaired by qualified and approved repair procedures. This flaw length has increased from a surface flaw length of 0.9 in. (base line equation). (3) The indicated change in empirically measured fatigue-crack growth equation did not adversely affect the previous work on modeling fatigue performance of these cranes.
Date:
February 3, 1997
Creator:
Dalder, E. N. C.
Object Type:
Report
System:
The UNT Digital Library
The Rice Thresher (Houston, Tex.), Vol. 85, No. 6, Ed. 1 Friday, October 3, 1997
A weekly student newspaper from the Rice University in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
October 3, 1997
Creator:
Hardi, Joel & Siy, Angelique
Object Type:
Newspaper
System:
The Portal to Texas History
Rio Grande Herald (Rio Grande City, Tex.), Vol. 84, No. 14, Ed. 1 Thursday, April 3, 1997
Weekly newspaper from Rio Grande City, Texas that includes local, state and national news along with extensive advertising.
Date:
April 3, 1997
Creator:
Roberts, Kenneth
Object Type:
Newspaper
System:
The Portal to Texas History
Rio Grande Herald (Rio Grande City, Tex.), Vol. 84, No. 27, Ed. 1 Thursday, July 3, 1997
Weekly newspaper from Rio Grande City, Texas that includes local, state and national news along with extensive advertising.
Date:
July 3, 1997
Creator:
Roberts, Kenneth
Object Type:
Newspaper
System:
The Portal to Texas History
Safety assessment for the storage and use of phosphoric acid in B Plant
This safety assessment was required to complete the evaluation of a USQ for the storage and use of phosphoric acid in B Plant.
Date:
January 3, 1997
Creator:
Chalk, S. E.
Object Type:
Report
System:
The UNT Digital Library
San Antonio Monthly Reports: April 1997
Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date:
May 3, 1997
Creator:
San Antonio (Tex.)
Object Type:
Report
System:
The Portal to Texas History
San Antonio Monthly Reports: August 1997
Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date:
September 3, 1997
Creator:
San Antonio (Tex.)
Object Type:
Report
System:
The Portal to Texas History
San Antonio Monthly Reports: December 1996
Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date:
January 3, 1997
Creator:
San Antonio (Tex.)
Object Type:
Report
System:
The Portal to Texas History
San Antonio Monthly Reports: July 1997
Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date:
August 3, 1997
Creator:
San Antonio (Tex.)
Object Type:
Report
System:
The Portal to Texas History
San Antonio Monthly Reports: June 1997
Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date:
July 3, 1997
Creator:
San Antonio (Tex.)
Object Type:
Report
System:
The Portal to Texas History
San Antonio Monthly Reports: May 1997
Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date:
June 3, 1997
Creator:
San Antonio (Tex.)
Object Type:
Report
System:
The Portal to Texas History
San Antonio Monthly Reports: November 1997
Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date:
December 3, 1997
Creator:
San Antonio (Tex.)
Object Type:
Report
System:
The Portal to Texas History
San Antonio Register (San Antonio, Tex.), Vol. 66, No. 3, Ed. 1 Thursday, July 3, 1997
Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.
Date:
July 3, 1997
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Sanger Courier (Sanger, Tex.), Vol. 98, No. 27, Ed. 1 Thursday, April 3, 1997
Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 3, 1997
Creator:
Hardy, Lisa
Object Type:
Newspaper
System:
The Portal to Texas History
Sanger Courier (Sanger, Tex.), Vol. 98, No. 36, Ed. 1 Thursday, July 3, 1997
Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.
Date:
July 3, 1997
Creator:
Hardy, Lisa
Object Type:
Newspaper
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 82, No. 96, Ed. 1 Friday, January 3, 1997
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 3, 1997
Creator:
Diehl, Don
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 82, No. 122, Ed. 1 Monday, February 3, 1997
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 3, 1997
Creator:
Diehl, Don
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 82, No. 146, Ed. 1 Monday, March 3, 1997
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 3, 1997
Creator:
Diehl, Don
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 82, No. 171, Ed. 1 Thursday, April 3, 1997
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 3, 1997
Creator:
Diehl, Don
Object Type:
Newspaper
System:
The Gateway to Oklahoma History