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7
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4
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The Chronicles of Oklahoma
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Borehole Seismic Monitoring of Injected CO2 at the Frio Site
As part of a small scale sequestration test (about 1500 tonsof CO2) in a saline aquifer, time-lapse borehole seismic surveys wereconducted to aid in characterization of subsurface CO2 distribution andmaterial property changes induced by the injected CO2. A VSP surveydemonstrated a large increase (about 75 percent) in seismic reflectivitydue to CO2 injection and allowed estimation of the spatial extent of CO2induced changes. A crosswell survey imaged a large seismic velocitydecrease (up to 500 m/s) within the injection interval and provided ahigh resolution image of this velocity change which maps the subsurfacedistribution of CO2 between two wells. Numerical modeling of the seismicresponse uses the crosswell measurements to show that this small CO2volume causes a large response in the seismic reflectivity. This resultdemonstrates that seismic detection of small CO2 volumes in salineaquifers is feasible and realistic.
Date:
April 21, 2006
Creator:
Daley, Thomas M.; Myer, Larry R.; Hoversten, G.M.; Peterson, JohnE. & Korneev, Valeri A.
System:
The UNT Digital Library
Reconstruction of False Spring Occurrence Over the Southeastern U.S., 1901–2007: Increasing Risk of Spring Freeze Damage?
Near-record warmth over much of the United States during March 2007 promoted early growth of crops and vegetation. A widespread arctic air outbreak followed in early April, resulting in extensive agricultural losses over the southeastern U.S. This “false spring” event also resulted in widespread damage to newly grown tissues of native deciduous forest species, shown by previous researchers to have affected the terrestrial carbon cycle. The current study reconstructed the historical occurrence of false springs for the southeastern U.S. (32–39 °N; 75–98 °W) from 1901–2007 using daily maximum and minimum temperature records from 176 stations in the Global Historical Climatology Network database, and Enhanced Vegetation Index (EVI) data derived from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations. A false spring index examined the relative timing of the start of the growing season (SGS), or leaf-out, to the timing of a potentially damaging last hard freeze (≤ -2.2 °C). SGS was modeled for the domain by combining EVI data with ground-based temperature “degree-day” calculations refl ecting the rate of springtime warming. No significant area-wide, long-term SGS trend was found (0.2 days later/decade; p = 0.3). However, the timing of the last hard freeze did occur significantly later (>1 day/decade; p < …
Date:
January 1, 2009
Creator:
Marino, Garrett P. & Kaiser, Dale P.
System:
The UNT Digital Library
Controlling Gully Erosion with Earth Dams in North-Central Texas
This article describes the use of earth dams for controlling gully erosion in part of the Eastern Cross Timbers of North-Central Texas.
Date:
January 2001
Creator:
Hudak, Paul F. & Chadbourne, John
System:
The UNT Digital Library
Lightning, Downed Power Line Form Intriguing Rock Structure in Denton, Texas
This article describes a vitrified soil structure, formed by atmospheric and human activity, possessing characteristics of igneous and metamorphic rocks.
Date:
March 2003
Creator:
Hudak, Paul F. & Maxey, George
System:
The UNT Digital Library
Indicators of Ecological Stress and Their Extent in the Population of Northeastern Lakes: A Regional-Scale Assessment
Article reporting findings from the Environmental Protection Agency (EPA)'s Environmental Monitoring and Assessment Program (EMAP) conducted on a sample of lakes in the Northeastern United States from 1991 to 1996.
Date:
March 2002
Creator:
Whittier, Thomas R.; Paulsen, Steven G.; Larsen, David P.; Peterson, Spencer A.; Herlihy, Alan T. & Kaufmann, Philip R.
System:
The UNT Digital Library
[Article Mock-up on Helen Snapp]
Article mock-up with edits containing the story of Helen Wyatt Snapp's experience with WASP and flying the B-17F Memphis Belle. A portrait of Snapp and illustration of the plane are also included.
Date:
March 2009
Creator:
Snapp, Helen Wyatt
System:
The Portal to Texas History
[Copy of an Article on Helen Snapp]
Article containing the story of Helen Wyatt Snapp, W.A.S.P. 43-w-4, her experience with WASP, and flying the B-17F Memphis Belle. A portrait of Snapp and illustration of the plane are also included.
Date:
March 2009
Creator:
Snapp, Helen Wyatt
System:
The Portal to Texas History
Roy Crane - International Museum of Cartoon Art Hall of Fame Profile
A printout of Roy Crane's Hall of Fame profile pages on the International Museum of Cartoon Art's website, accessed March 15, 2004.
Date:
March 15, 2004
Creator:
Roy, Crane, Jr.
System:
The Portal to Texas History
Multicultural Center in the News, April 1, 2005
A document about a story in the NT Daily that covers a UNT Multicultural Center Event. It is titled "Women of Color conference focuses on unity". There is also a picture of panelists at the event.
Date:
February 22, 2006
Creator:
University of North Texas. Multicultural Center.
System:
The UNT Digital Library
Surface Remediation in the Aleutian Islands: A Case Study of Amchitka Island, Alaska
Amchitka Island, Alaska, was at one time an integral player in the nation's defense program. Located in the North Pacific Ocean in the Aleutian Island archipelago, the island was intermittently inhabited by several key government agencies, including the U.S. Army, the U.S. Atomic Energy Commission (predecessor agency to the U.S. Department of Energy), and the U.S. Navy. Since 1993, the U.S. Department of Energy (DOE) has conducted extensive investigations on Amchitka to determine the nature and extent of contamination resulting from historic nuclear testing. The uninhabited island was the site of three high-yield nuclear tests from 1965 to 1971. These test locations are now part of the DOE's National Nuclear Security Administration Nevada Operations Office's Environmental Management Program. In the summer of 2001, the DOE launched a large-scale remediation effort on Amchitka to perform agreed-upon corrective actions to the surface of the island. Due to the lack of resources available on Amchitka and logistical difficulties with conducting work at such a remote location, the DOE partnered with the Navy and U.S. Army Corps of Engineers (USACE) to share certain specified costs and resources. Attempting to negotiate the partnerships while organizing and implementing the surface remediation on Amchitka proved to be …
Date:
February 25, 2002
Creator:
Giblin, M. O.; Stahl, D. C. & Bechtel, J. A.
System:
The UNT Digital Library
Remote Sensing Analysis of the Sierra Blanca (Faskin Ranch) Low-Level Radioactive Waste Disposal Site, Hudspeth County, Texas
Remote sensing images provide useful physical information, revealing such features as geological structure, vegetation, drainage patterns, and variations in consolidated and unconsolidated lithologies. That technology has been applied to the failed Sierra Blanca (Faskin Ranch) shallow burial low-level radioactive waste disposal site selected by the Texas Low-Level Radioactive Waste Disposal Authority. It has been re-examined using data from LANDSAT satellite series. The comparison of the earlier LANDSAT V (5/20/86) (30-m resolution) with the later new, higher resolution ETM imagery (10/23/99) LANDSAT VII data (15-m resolution) clearly shows the superiority of the LANDSAT VII data. The search for surficial indications of evidence of fatal flaws at the Sierra Blanca site utilizing was not successful, as it had been in the case of the earlier remote sensing analysis of the failed Fort Hancock site utilizing LANDSAT V data. The authors conclude that the tectonic activity at the Sierra Blanca site is much less recent and active than in the previously studied Fort Hancock site. The Sierra Blanca site failed primarily on the further needed documentation concerning a subsurface fault underneath the site and environmental justice issues. The presence of this fault was not revealed using the newer LANDSAT VII data. Despite this …
Date:
February 26, 2002
Creator:
LeMone, D. V.; Dodge, R.; Xie, H.; Langford, R. P. & Keller, G. R.
System:
The UNT Digital Library
Combined Geophysical Investigation Techniques to Identify Buried Waste in an Uncontrolled Landfill at the Paducah Gaseous Diffusion Plant, Kentucky
The primary objective of the investigation was to confirm the presence and determine the location of a cache of 30 to 60 buried 55-gallon drums that were allegedly dumped along the course of the pre-existing, northsouth diversion ditch (NSDD) adjacent to permitted landfills at the Paducah Gaseous Diffusion Plant, Kentucky. The ditch had been rerouted and was being filled and re-graded at the time of the alleged dumping. Historic information and interviews with individuals associated with alleged dumping activities indicated that the drums were dumped prior to the addition of other fill materials. In addition, materials alleged to have been dumped in the ditch, such as buried roofing materials, roof flashing, metal pins, tar substances, fly ash, and concrete rubble complicated data interpretation. Some clean fill materials have been placed over the site and graded. This is an environment that is extremely complicated in terms of past waste dumping activities, construction practices and miscellaneous landfill operations. The combination of site knowledge gained from interviews and research of existing site maps, variable frequency EM data, classical total magnetic field data and optimized GPR lead to success where a simpler less focused approach by other investigators using EM-31 and EM-61 electromagnetic methods …
Date:
February 27, 2003
Creator:
Miller, Peter T. & Starmer, R. John
System:
The UNT Digital Library
A new lizard species in the genus Xantusia from Arizona
None
Date:
September 6, 2001
Creator:
Papenfuss, Theodore J.; Macey, J. Robert & Schulte II, James A.
System:
The UNT Digital Library
Evidence for an unsaturated-zone origin of secondary minerals in Yucca Mountain, Nevada
The unsaturated zone (UZ) in Miocene-age welded tuffs at Yucca Mountain, Nevada, is under consideration as a potential site for the construction of a high-level radioactive waste repository. Secondary calcite and silica minerals deposited on fractures and in cavities in the UZ tuffs are texturally, isotopically, and geochemically consistent with UZ deposition from meteoric water infiltrating at the surface and percolating through the UZ along fractures. Nonetheless, two-phase fluid inclusions with small and consistent vapor to liquid (V:L) ratios that yield consistent temperatures within samples and which range from about 35 to about 80 C between samples have led some to attribute these deposits to formation from upwelling hydrothermal waters. Geochronologic studies have shown that calcite and silica minerals began forming at least 10 Ma and continued to form into the Holocene. If their deposition were really from upwelling water flooding the UZ, it would draw into question the suitability of the site as a waste repository.
Date:
April 29, 2001
Creator:
Whelan, Joseph F.; Roedder, Edwin & Paces, James B.
System:
The UNT Digital Library
["Bush, gay Republican group make amends" article, April 12, 2000]
An article, written by Christopher Lee for The Dallas Morning News, about the a meeting between Presidential candidate George W. Bush and gay and lesbian Republican supporters. The piece includes remarks from advocates and past policies held by Bush.
Date:
April 12, 2000
Creator:
Lee, Christopher
System:
The UNT Digital Library
["Bush Admin. Broadens Gay Overtures" article, October 27, 2001]
An article, written by David Crary for The Washington Post, about the Bush administration's early support for gay and lesbian individuals and the response from the socially conservative right as well as the left.
Date:
October 27, 2001
Creator:
Crary, David
System:
The UNT Digital Library
["RUC Files Amicus Brief in Lawrence v. Texas" article, September 17, 2002]
An article draft covering the filing of an amicus brief by the Republican Unity Coalition. The brief is being applied to the Lawrence v. Texas Supreme Court case that has to do with "homosexual conduct" and its legality.
Date:
September 17, 2002
Creator:
unknown
System:
The UNT Digital Library
["Bush to name conservative, gays to AIDS panel" article, April 1, 2002]
An article, written by Lou Chibbaro Jr. for the Washington Blade, about the new group of advisors who will be tackling the HIV/AIDS issue with President George W. Bush. The article lists out the new members and also points to supporters and raises concerns that some have over what the group's outcome will be.
Date:
April 1, 2002
Creator:
Chibbaro, Lou, Jr.
System:
The UNT Digital Library
["Justices, 6-3, Legalize Gay Sexual Conduct in Sweeping Reversal of Court's '86 Ruling" article, JUne 27, 2003]
An article on the front page of The New York Times, written by Linda Greenhouse, that covers the ruling of the Supreme Court on the Lawrence v Texas case overturning the ban on gay sexual conduct. Another article about New York's under-financed schools shares the cover page.
Date:
June 27, 2003
Creator:
Greenhouse, Linda
System:
The UNT Digital Library
["A Question of Loyalty" article, March 13, 2001]
An article, written by Chris Bull for the LGBT magazine "The Advocate", that covers the Republican Unity Coalition, Log Cabin Republicans, and their members' responses to the new Bush administration. On the second page is an advertisement for a new movie.
Date:
March 13, 2001
Creator:
Bull, Chris
System:
The UNT Digital Library
["Bush Says He Won't Hesitate to Appoint Gays to Jobs" article, April 14, 2000]
An article, written by Terry M. Neal for The Washington Post, that covers the then presidential candidate George W. Bush's opinion and policy surrounding gay and lesbian workers and applicants. The piece notes the work Bush's campaign group did in the lead-up to his meeting with the Log Cabin Republicans and cites Bush's previous interviews and stances on the topics.
Date:
April 14, 2000
Creator:
Neal, Terry M.
System:
The UNT Digital Library
["Mary Cheney joins 'gay-straight' GOP group" article, April 26, 2002]
An article written for the Washington Blade about Mary Cheney joining the Republican Unity Coalition's advisory board. The piece includes comments from RUC Co-Chairman Charles C. Francis and also mentions another newer member President Gerald R. Ford.
Date:
April 26, 2002
Creator:
unknown
System:
The UNT Digital Library
["A Falling Out Among Friends" article, March 8, 2004]
An article, written by Debra Rosenberg and Mark Miller for Newsweek, about President George W. Bush's support of the marriage amendment that would ban gay and lesbian marriages at the federal level. It includes the response of Charles C. Francis and other gay and lesbian Republicans. An advertisement follows the article.
Date:
March 8, 2004
Creator:
Rosenberg, Debra & Miller, Mark
System:
The UNT Digital Library
["Wariness and Optimism Vie as Gays View New President" article, January 26, 2001]
An article written by Elizabeth Becker for the New York Times about the acknowledgement of the Republican Unity Coalition and inclusion of gay and lesbian people in ceremonies. The piece also speaks about the opinions of the new president George W. Bush and vice president Dick Cheney.
Date:
January 26, 2001
Creator:
Becker, Elizabeth
System:
The UNT Digital Library