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3-D elastic wave scattering by a layer containing vertical periodic fractures (open access)

3-D elastic wave scattering by a layer containing vertical periodic fractures

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Date: April 30, 2002
Creator: Nakagawa, Seiji; Nihei, Kurt T.; Myer, Larry R. & Majer, Ernest L.
Object Type: Article
System: The UNT Digital Library
3-D Numerical Modeling of a Complex Salt Structure (open access)

3-D Numerical Modeling of a Complex Salt Structure

Reliably processing, imaging, and interpreting seismic data from areas with complicated structures, such as sub-salt, requires a thorough understanding of elastic as well as acoustic wave propagation. Elastic numerical modeling is an essential tool to develop that understanding. While 2-D elastic modeling is in common use, 3-D elastic modeling has been too computationally intensive to be used routinely. Recent advances in computing hardware, including commodity-based hardware, have substantially reduced computing costs. These advances are making 3-D elastic numerical modeling more feasible. A series of example 3-D elastic calculations were performed using a complicated structure, the SEG/EAGE salt structure. The synthetic traces show that the effects of shear wave propagation can be important for imaging and interpretation of images, and also for AVO and other applications that rely on trace amplitudes. Additional calculations are needed to better identify and understand the complex wave propagation effects produced in complicated structures, such as the SEG/EAGE salt structure.
Date: February 17, 2000
Creator: House, L.; Larsen, S. & Bednar, J. B.
Object Type: Article
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
The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States (open access)

The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States

The official Government edition of the Final Report of the National Commission on Terrorist Attacks Upon the United States (also known as the 9-11 Commission, an independent, bipartisan commission created by congressional legislation and the signature of President George W. Bush in late 2002), provides a full and complete account of the circumstances surrounding the September 11, 2001 terrorist attacks, including preparedness for and the immediate response to the attacks. Provides recommendations designed to guard against future attacks.
Date: July 22, 2004
Creator: National Commission on Terrorist Attacks upon the United States
Object Type: Book
System: The UNT Digital Library
300 Area Uranium Leach and Adsorption Project (open access)

300 Area Uranium Leach and Adsorption Project

The objective of this study was to measure the leaching and adsorption characteristics of uranium in six near-surface sediment samples collected from the 300 Area of the Hanford Site. Scanning electron micrographs of the samples showed that the uranium contamination in the sediments is most likely present as co-precipitates and/or discrete uranium particles. Molecular probe techniques also confirm the presence of crystalline discrete uranium bearing phases. In all cases, the uranium is present as oxidized uranium (uranyl [U(VI)]). Results from the column leach tests showed that uranium leaching did not follow a constant solubility paradigm. Four of the five contaminated sediments showed a large near instantaneous release of a few percent of the total uranium followed by a slower continual release. Steady-state uranium leachate concentrations were never measured and leaching characteristics and trends were not consistent among the samples. Dissolution kinetics were slow, and the measured leach curves most likely represent a slow kinetically controlled desorption or dissolution paradigm. Batch adsorption experiments were performed to investigate the effect of pH and uranium and carbonate solution concentrations on uranium adsorption onto the uncontaminated sediment. Uranium adsorption Kd values ranged from 0 to > 100 ml/g depending on which solution parameter was …
Date: November 26, 2002
Creator: Serne, R. Jeffrey; Brown, Christopher F.; Schaef, Herbert T.; Pierce, Eric M.; Lindberg, Michael J.; Wang, Zheming et al.
Object Type: Report
System: The UNT Digital Library
14th Workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes; Extended Abstracts and Papers (open access)

14th Workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes; Extended Abstracts and Papers

The 14th Workshop will provide a forum for an informal exchange of technical and scientific information between international researchers in the photovoltaic and relevant non-photovoltaic fields. It will offer an excellent opportunity for researchers in private industry and at universities to prioritize mutual needs for future collaborative research. The workshop is intended to address the fundamental properties of PV silicon, new solar cell designs, advanced solar cell processing techniques, and cell-related module issues. A combination of oral presentations by invited speakers, poster sessions, and discussion sessions will review recent advances in crystal growth, new cell designs, new processes and process characterization techniques, cell fabrication approaches suitable for future manufacturing demands, and solar cell encapsulation. This year's theme, ''Crystalline Si Solar Cells: Leapfrogging the Barriers,'' reflects the continued success of crystalline Si PV in overcoming technological barriers to improve solar cell performance and lower the cost of Si PV. The workshop will consist of presentations by invited speakers, followed by discussion sessions. In addition, there will be two poster sessions presenting the latest research and development results. Some presentations will address recent technologies in the microelectronics field that may have a direct bearing on PV. The sessions will include: Advances in …
Date: August 1, 2004
Creator: Sopori, B. L.
Object Type: Book
System: The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 29, No. 18, Ed. 1 Friday, February 18, 2000 (open access)

15th Street News (Midwest City, Okla.), Vol. 29, No. 18, Ed. 1 Friday, February 18, 2000

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: February 18, 2000
Creator: Steele, Janet
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 29, No. 19, Ed. 1 Friday, February 25, 2000 (open access)

15th Street News (Midwest City, Okla.), Vol. 29, No. 19, Ed. 1 Friday, February 25, 2000

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: February 25, 2000
Creator: Steele, Janet
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 29, No. 25, Ed. 1 Friday, April 21, 2000 (open access)

15th Street News (Midwest City, Okla.), Vol. 29, No. 25, Ed. 1 Friday, April 21, 2000

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: April 21, 2000
Creator: Steele, Janet
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 30, No. 17, Ed. 1 Friday, February 23, 2001 (open access)

15th Street News (Midwest City, Okla.), Vol. 30, No. 17, Ed. 1 Friday, February 23, 2001

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: February 23, 2001
Creator: Baldwin, Alisha
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 30, No. 23, Ed. 1 Friday, April 13, 2001 (open access)

15th Street News (Midwest City, Okla.), Vol. 30, No. 23, Ed. 1 Friday, April 13, 2001

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: April 13, 2001
Creator: Baldwin, Alisha
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 30, No. 25, Ed. 1 Friday, April 27, 2001 (open access)

15th Street News (Midwest City, Okla.), Vol. 30, No. 25, Ed. 1 Friday, April 27, 2001

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: April 27, 2001
Creator: Baldwin, Alisha
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 33, No. 18, Ed. 1 Friday, February 27, 2004 (open access)

15th Street News (Midwest City, Okla.), Vol. 33, No. 18, Ed. 1 Friday, February 27, 2004

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: February 27, 2004
Creator: Pound, Jaylynn Christian
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 34, No. 7, Ed. 1 Friday, October 15, 2004 (open access)

15th Street News (Midwest City, Okla.), Vol. 34, No. 7, Ed. 1 Friday, October 15, 2004

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: October 15, 2004
Creator: Delaney, Darcy
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 34, No. 8, Ed. 1 Friday, October 29, 2004 (open access)

15th Street News (Midwest City, Okla.), Vol. 34, No. 8, Ed. 1 Friday, October 29, 2004

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: October 29, 2004
Creator: Delaney, Darcy
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 34, No. 19, Ed. 1 Friday, March 11, 2005 (open access)

15th Street News (Midwest City, Okla.), Vol. 34, No. 19, Ed. 1 Friday, March 11, 2005

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: March 11, 2005
Creator: Delaney, Darcy
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 34, No. 26, Ed. 1 Friday, May 6, 2005 (open access)

15th Street News (Midwest City, Okla.), Vol. 34, No. 26, Ed. 1 Friday, May 6, 2005

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: May 6, 2005
Creator: Delaney, Darcy
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 37, No. 12, Ed. 1 Friday, December 7, 2007 (open access)

15th Street News (Midwest City, Okla.), Vol. 37, No. 12, Ed. 1 Friday, December 7, 2007

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: December 7, 2007
Creator: Pace, Joshua
Object Type: Newspaper
System: The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 39, No. 3, Ed. 1 Friday, September 4, 2009 (open access)

15th Street News (Midwest City, Okla.), Vol. 39, No. 3, Ed. 1 Friday, September 4, 2009

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: September 4, 2009
Creator: Price, Racheal
Object Type: Newspaper
System: The Gateway to Oklahoma History
16th National Conference of Black Physics Students - Physics: Science That Unlocks the Secrets of Nature (open access)

16th National Conference of Black Physics Students - Physics: Science That Unlocks the Secrets of Nature

16th National Conference of Black Physics Students - The agenda and its report.
Date: March 13, 2002
Creator: unknown
Object Type: Article
System: The UNT Digital Library
1993 BRAC Commission Report (open access)

1993 BRAC Commission Report

Defense Base Closure and Realignment Commission 1993 Report to the President.
Date: January 4, 2006
Creator: unknown
Object Type: Book
System: The UNT Digital Library
1995 Army Team Lead Desk Material - 1991 BRAC Commission Final Report (open access)

1995 Army Team Lead Desk Material - 1991 BRAC Commission Final Report

1995 Army Team Lead Desk Material - 1991 BRAC Commission Final Report.
Date: February 17, 2006
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Book
System: The UNT Digital Library
1995 BRAC Commission Report (open access)

1995 BRAC Commission Report

1995 BRAC Commission Final Report to the President.
Date: January 4, 2006
Creator: unknown
Object Type: Book
System: The UNT Digital Library
1999 Laboratory Directed Research and Development Annual Report (open access)

1999 Laboratory Directed Research and Development Annual Report

This reports summarizes progress from the Laboratory Directed Research and Development (LDRD) program during fiscal year 1999.
Date: March 2000
Creator: Chavez, Donna G.
Object Type: Report
System: The UNT Digital Library