U N T Established 1890 U N T
University Libraries

Digital Collections

Access

Resource Type

Partner

Collection

Serial/Series Title

Degree Department

Degree Discipline

Degree Level

Country

States

Counties

Decade

Year

Month

Day

Language

428,080 Matching Results

Start Over Language English

Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.

Results: 1 - 24 of 428,080 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
Arctic Energy Technology Development Laboratory (Part 2) (open access)

Arctic Energy Technology Development Laboratory (Part 2)

Methane (CH{sub 4}) in natural gas is a major energy source in the U.S., and is used extensively on Alaska's North Slope, including the oilfields in Prudhoe Bay, the community of Barrow, and the National Petroleum Reserve, Alaska (NPRA). Smaller villages, however, are dependent on imported diesel fuel for both power and heating, resulting in some of the highest energy costs in the U.S. and crippling local economies. Numerous CH{sub 4} gas seeps have been observed on wetlands near Atqasuk, Alaska (in the NPRA), and initial measurements have indicated flow rates of 3,000-5,000 ft{sup 3} day{sup -1} (60-100 kg CH{sub 4} day{sup -1}). Gas samples collected in 1996 indicated biogenic origin, although more recent sampling indicated a mixture of biogenic and thermogenic gas. In this study, we (1) quantified the amount of CH{sub 4} generated by several seeps and evaluated their potential use as an unconventional gas source for the village of Atqasuk; (2) collected gas and analyzed its composition from multiple seeps several miles apart to see if the source is the same, or if gas is being generated locally from isolated biogenic sources; and (3) assessed the potential magnitude of natural CH{sub 4} gas seeps for future use …
Date: December 31, 2008
Creator: 960443, See OSTI ID Number
Object Type: Report
System: The UNT Digital Library
Arctic Energy Technology Development Laboratory (Part 3) (open access)

Arctic Energy Technology Development Laboratory (Part 3)

Various laboratory tests were carried at the R & D facility of BJ Services in Tomball, TX with BJ Services staff to predict and evaluate the performance of the Ceramicrete slurry for its effective use in permafrost cementing operations. Although other standards such as those of the American Standard for Testing Materials (ASTM) and Construction Specification Institute (CSI) exist, all these tests were standardized by the API. A summary of the tests traditionally used in the cement slurry design as well as the API tests reference document are provided in Table 7. All of these tests were performed within the scope of this research to evaluate properties of the Ceramicrete.
Date: December 31, 2008
Creator: 960443, See OSTI ID Number
Object Type: Report
System: The UNT Digital Library
Famous Well by Lake Pinto

Famous Well by Lake Pinto

Photograph of a brick building with three columns holding up an overhang. To the left of this building is a tin building with "Famous Well" written on a plank beside its door. Trees cover a rocky hill behind the buildings.
Date: January 10, 1919
Creator: A. F. Weaver Photography
Object Type: Photograph
System: The Portal to Texas History
Some Comments on the La Primavera Geothermal Field, Mexico (open access)

Some Comments on the La Primavera Geothermal Field, Mexico

The La Primavera geothermal field is located about 20 km west of the city of Guadalajara, Jalisco, in the western part of the Mexican Neovolcanic Axis. Initial results of five deep exploration wells (down to 2000 m depth) were very promising; measured downhole temperatures exceed 300/sup 0/C. During production, however, downhole temperatures dropped, and the chemistry of the fluids changed. The analysis of geologic, mineralogic, geochemical, and well completion data indicate that colder fluids flow down the wellbore from shallower aquifers cooling the upper zones of the geothermal reservoir. This problem is attributed to inadequate well completions. Doubts have arisen about continuing the exploration of the field because of the somewhat disappointing drilling results. However, a more thorough analysis of all available data indicates that a good geothermal prospect might exist below 3000 m, and that it could be successfully developed with appropriately located and completed wells.
Date: December 1, 1983
Creator: A., B. Dominguez & Lippmann, M. J.
Object Type: Article
System: The UNT Digital Library
Some Comments on the La Primavera Geothermal Field, Mexico (open access)

Some Comments on the La Primavera Geothermal Field, Mexico

The La Primavera geothermal field is located about 20 km west of the city of Guadalajara, Jalisco, in the western part of the Mexican Neovolcanic Axis. Initial results of five deep exploration wells (down to 2000 m depth) were very promising; measured downhole temperatures exceed 300{degrees}C. During production, however, downhole temperatures dropped, and the chemistry of the fluids changed. The analysis of geologic, mineralogic, geochemical, and well completion data indicate that colder fluids flow down the wellbore from shallower aqifers cooling the upper zones of the gothermal reservoir. This problem is attributed to inadequate well completions. Doubts have arisen about continuing the exploration of the field because of the somewhat disappointing drilling results. However, a more thorough analysis of all available data indicates that a good geothermal prospect might exist below 3000 m, and that it could be successfully developed with appropriately located and completed wells.
Date: December 15, 1983
Creator: A., Bernardo Dominguez & Lippmann, Marcelo J.
Object Type: Article
System: The UNT Digital Library
Final Report Enhanced Geothermal Systems Technology Phase Ii Animas Valley, New Mexico (open access)

Final Report Enhanced Geothermal Systems Technology Phase Ii Animas Valley, New Mexico

Final Technical Report covering siting, permitting, and drilling two geothermal temperature gradient holes. This report provides a summary of geotechnical and geophysical data that led to the siting, drilling, and completion of 2 temperature gradient holes in the geothermal anomaly at Lightning Dock Known Geothermal Resource Area in the Animas Valley of New Mexico. Included in this report is a summary of institutional factors and data defining the well drilling process and acquiring drilling permits. Data covering the results of the drilling and temperature logging of these two holes are provided. The two gradient holes were sited on federal geothermal leases owned by Lightning Dock Geothermal, Inc. and both holes were drilled into lakebed sediments some distance from the intense shallow geothermal anomaly located in the eastern half of Section 7, Township 25 South, Range 19 West.
Date: December 29, 2003
Creator: A.Cunniff, Roy & Bowers, Roger L.
Object Type: Report
System: The UNT Digital Library
[Clipping: AIDS Update: The Newsletter of the AIDS Resource Center] (open access)

[Clipping: AIDS Update: The Newsletter of the AIDS Resource Center]

May 1993, Volume VIII, Number 5 edition of The AIDS Resource Center newsletter. The newsletter features "AIDS Update" information about resources, events, and services.
Date: May 1993
Creator: AIDS Resource Center
Object Type: Clipping
System: The UNT Digital Library
AIDS Update, Volume 6, Number 4, April 1991 (open access)

AIDS Update, Volume 6, Number 4, April 1991

Monthly newsletter describing news and events related to the AIDS Resource Center in Dallas, Texas as well as articles, letters, advice columns, and advertisements of interest to subscribers.
Date: April 1991
Creator: AIDS Resource Center (Dallas, Tex.)
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
AIDS Update, Volume 8, Number 2, February 1993 (open access)

AIDS Update, Volume 8, Number 2, February 1993

Monthly newsletter describing news and events related to the AIDS Resource Center in Dallas, Texas as well as articles, letters, advice columns, and advertisements of interest to subscribers.
Date: February 1993
Creator: AIDS Resource Center (Dallas, Tex.)
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
SUMMARY REPORT DIRECT PUSH TECHNOLOGY BOREHOLES FOR GEOPHYSICAL LOGGING 200-IS-1 OPERABLE UNIT FY2008 (open access)

SUMMARY REPORT DIRECT PUSH TECHNOLOGY BOREHOLES FOR GEOPHYSICAL LOGGING 200-IS-1 OPERABLE UNIT FY2008

None
Date: February 10, 2009
Creator: AK, LEE
Object Type: Report
System: The UNT Digital Library
INTERNATIONAL ENGLISH MANUAL (open access)

INTERNATIONAL ENGLISH MANUAL

This document presents a set of guidelines for authors who wish to express themselves more clearly to foreign readers, or readers whose first language is not American English. Topics include idioms, technical terms, jargon, word meaning, acronyms, and international conventions of measurement. The guidelines will help writers of technical documents present their ideas more effectively to audiences that may include individuals whose first language is not American English, including audiences with individuals from other English-speaking countries.
Date: February 22, 2002
Creator: AMADOR, MABLE & KELLER, YVONNE KELLER
Object Type: Report
System: The UNT Digital Library
Archaeological Survey of the Proposed Weatherford 12-Inch Sewer Pipeline Route, Parker County, Texas (open access)

Archaeological Survey of the Proposed Weatherford 12-Inch Sewer Pipeline Route, Parker County, Texas

Results of field and archaeological investigations along with recommendations concerning proposed sewer pipeline.
Date: 2008
Creator: AR Consultants
Object Type: Report
System: The Portal to Texas History
Cultural Resources Survey for Burlington Resources Oil and Gas Company's Well #1H Fort Wolters, Lake Mineral Wells State Park, Parker County, Texas (open access)

Cultural Resources Survey for Burlington Resources Oil and Gas Company's Well #1H Fort Wolters, Lake Mineral Wells State Park, Parker County, Texas

Survey results of proposed pipeline route through Lake Mineral Wells State Park in Parker County, Texas.
Date: 2006
Creator: AR Consultants
Object Type: Report
System: The Portal to Texas History
Cultural Resources Survey for Burlington Resources Oil & Gas Company's Coalson #3H-5H Well Pad Sites and Associated Pipeline Route Park County, Texas (open access)

Cultural Resources Survey for Burlington Resources Oil & Gas Company's Coalson #3H-5H Well Pad Sites and Associated Pipeline Route Park County, Texas

Archaeological survey results of proposed pad well sites, access roads, and pipeline routes in Parker County, Texas.
Date: 2007
Creator: AR Consultants
Object Type: Report
System: The Portal to Texas History
SATURATED ZONE FLOW AND TRANSPORT MODEL ABSTRACTION (open access)

SATURATED ZONE FLOW AND TRANSPORT MODEL ABSTRACTION

The purpose of the saturated zone (SZ) flow and transport model abstraction task is to provide radionuclide-transport simulation results for use in the total system performance assessment (TSPA) for license application (LA) calculations. This task includes assessment of uncertainty in parameters that pertain to both groundwater flow and radionuclide transport in the models used for this purpose. This model report documents the following: (1) The SZ transport abstraction model, which consists of a set of radionuclide breakthrough curves at the accessible environment for use in the TSPA-LA simulations of radionuclide releases into the biosphere. These radionuclide breakthrough curves contain information on radionuclide-transport times through the SZ. (2) The SZ one-dimensional (I-D) transport model, which is incorporated in the TSPA-LA model to simulate the transport, decay, and ingrowth of radionuclide decay chains in the SZ. (3) The analysis of uncertainty in groundwater-flow and radionuclide-transport input parameters for the SZ transport abstraction model and the SZ 1-D transport model. (4) The analysis of the background concentration of alpha-emitting species in the groundwater of the SZ.
Date: October 27, 2004
Creator: ARNOLD, B.W.
Object Type: Report
System: The UNT Digital Library
THERMAL TESTING MEASUREMENTS REPORT (open access)

THERMAL TESTING MEASUREMENTS REPORT

None
Date: September 27, 2004
Creator: ASHLEY, D.A. & JONES, R.L.
Object Type: Report
System: The UNT Digital Library
Definition of Intrusion Scenarios and Example Concentration Ranges for the Disposal of Near-Surface Waste at the Hanford Site (open access)

Definition of Intrusion Scenarios and Example Concentration Ranges for the Disposal of Near-Surface Waste at the Hanford Site

The US Department of Energy (DOE) is in the process of conducting performance assessments of its radioactive waste sites and disposal systems to ensure that public health and safety are protected, the environment is preserved, and that no remedial actions after disposal are required. Hanford Site low-level waste performance assessments are technical evaluations of waste sites or disposal systems that provide a basis for making decisions using established criteria. The purpose of this document is to provide a family of scenarios to be considered when calculating radionuclide exposure to individuals who may inadvertently intrude into near-surface waste disposal sites. Specific performance assessments will use modifications of the general scenarios described here to include additional site/system details concerning the engineering design, waste form, inventory, and environmental setting. This document also describes and example application of the Hanford-specific scenarios in the development of example concentration ranges for the disposal of near-surface wastes. The overall goal of the example calculations is to illustrate the application of the scenarios in a performance assessment to assure that people in the future cannot receive a dose greater than an established limit. 24 refs., 2 figs., 5 tabs.
Date: October 1990
Creator: Aaberg, R. L. & Kennedy, W. E., Jr.
Object Type: Report
System: The UNT Digital Library
Significance of Soft Zone Sediments at the SRS (open access)

Significance of Soft Zone Sediments at the SRS

The purpose of this report is to provide information on the origin, extent and stability of ''soft zones'' in the carbonate bearing strata at the Savannah River Site (SRS). As part of this study, a comprehensive historical compendium of how soft zones have been addressed during the past 47 years at SRS is reviewed.
Date: February 3, 2000
Creator: Aadland, R. K.
Object Type: Report
System: The UNT Digital Library
Hydrostratigraphy of the General Separations Area, Savannah River Site (SRS), South Carolina (open access)

Hydrostratigraphy of the General Separations Area, Savannah River Site (SRS), South Carolina

Detailed analysis and synthesis of geophysical, core, and hydrologic data from 230 wells were used to delineate the hydrostratigraphy and aquifer characteristics of the General Separations Area at SRS. The study area is hydrologically bounded on the north and northwest by Upper Three Runs Creek (UTRC) and on the south by Fourmile Branch (FB). The Cretaceous-Tertiary sedimentary sequence underlying the study area is divided into two Aquifer Systems; in ascending order, Aquifer Systems I and 11. The study concentrated on Aquifer System U, which includes all the Tertiary sediments above the Black Mingo Group (Paleocene) to the water table. This report includes a series of lithostratigraphic cross-sections, piezometric gradient profiles, head ratio contour maps, aquifer isopach maps, and potentiometric surface maps which illustrate the aquifer characteristics of the study area.
Date: January 1, 1991
Creator: Aadland, R. K.; Harris, M. K.; Lewis, C. M.; Gaughan, T. F. & Westbrook, T. M.
Object Type: Report
System: The UNT Digital Library
Hydrostratigraphy of the General Separations Area, Savannah River Site (SRS), South Carolina (open access)

Hydrostratigraphy of the General Separations Area, Savannah River Site (SRS), South Carolina

Detailed analysis and synthesis of geophysical, core, and hydrologic data from 230 wells were used to delineate the hydrostratigraphy and aquifer characteristics of the General Separations Area at SRS. The study area is hydrologically bounded on the north and northwest by Upper Three Runs Creek (UTRC) and on the south by Fourmile Branch (FB). The Cretaceous-Tertiary sedimentary sequence underlying the study area is divided into two Aquifer Systems; in ascending order, Aquifer Systems I and 11. The study concentrated on Aquifer System U, which includes all the Tertiary sediments above the Black Mingo Group (Paleocene) to the water table. This report includes a series of lithostratigraphic cross-sections, piezometric gradient profiles, head ratio contour maps, aquifer isopach maps, and potentiometric surface maps which illustrate the aquifer characteristics of the study area.
Date: January 1, 1991
Creator: Aadland, R. K.; Harris, M. K.; Lewis, C. M.; Gaughan, T. F. (Westinghouse Savannah River Co., Aiken, SC (United States)) & Westbrook, T. M. (Dames and Moore, Atlanta, GA (United States))
Object Type: Report
System: The UNT Digital Library
Lithological and hydrological characteristics of the tertiary hydrostratigraphic systems of the general separations area at the Savannah River Site (open access)

Lithological and hydrological characteristics of the tertiary hydrostratigraphic systems of the general separations area at the Savannah River Site

The General Separations Area (GSA) is an approximately 15-square-mile area near the geographic center of the Savannah River Site (SRS). The SRS is located in the Upper Atlantic Coastal Plain physiographic province of South Carolina on the Aiken Plateau at an elevation of approximately 300 feet above mean sea level. The sedimentary sequence of the GSA comprises unconsolidated sediments ranging in age from Cretaceous to Holocene with isolated zones of consolidated sediments. The Tertiary sediments are composed of sand, silt, clay, and calcareous materials of varying composition. The alpha-numeric hydrostratigraphic nomenclature proposed by Aadland (1990) is used herein. The Tertiary-age lithostratigraphic sequence at the GSA is composed predominantly of terrigenous clastics interspersed with carbonate-rich clastics and limestones. The calcareous lithologies are discontinuous and divided into a lower and upper zone. 15 refs., 2 figs.
Date: January 1, 1990
Creator: Aadland, R.K. (Westinghouse Savannah River Co., Aiken, SC (USA)); Harris, M.K. & Westbrook, T.M. (Dames and Moore, Atlanta, GA (USA))
Object Type: Article
System: The UNT Digital Library
Uranium hydrogeochemical and stream sediment reconnaissance in Lincoln and Flathead Counties, northwest Montana (open access)

Uranium hydrogeochemical and stream sediment reconnaissance in Lincoln and Flathead Counties, northwest Montana

Between mid-May and late June 1976, 3409 water and water-transported sediment samples were collected from 1781 locations spread over an approximate 17000-km/sup 2/ area of northwestern Montana. All of the samples were analyzed for total uranium at the LASL, using standardized procedures and rigorous quality controls, the waters by fluorometry and the sediment (and those waters with greater than 10 ppb uranium) by delayed-neutron counting methods. All of the field collection, treatment, and packaging of the samples was performed following strict LASL specifications. The uranium concentrations measured in the waters range from undetectable (less than 0.2) ppb to 173.6 ppb, but average only 0.66 ppb. The low uranium concentrations in the waters of this area are thought to be due primarily to a general lack of readily soluble uranium and dilution with spring runoff. Those locations which did have abnormally high uranium were examined more closely, and follow-up field examinations are recommended in the vicinity of some of these sites. The uranium content of the sediment samples range from 0.5 ppM to 52.2 ppM and average 4.56 ppM. Sample locations with high and/or anomalous uranium values were examined with respect to the local geology, water chemistry, and other relevant factors. …
Date: May 1, 1977
Creator: Aamodt, P. L.
Object Type: Report
System: The UNT Digital Library
Uranium Hydrogeochemical and Stream Sediment Pilot Study of the Boulder Batholith, Montana (open access)

Uranium Hydrogeochemical and Stream Sediment Pilot Study of the Boulder Batholith, Montana

This report presents the results of a uranium hydrogeochemical and stream sediment study made in the fall of 1976 of Boulder Batholith, Montana.
Date: March 1978
Creator: Aamodt, Paul L.
Object Type: Report
System: The UNT Digital Library
Uranium Hydrogeochemical and Stream Sediment Reconnaissance in Lincoln and Flathead Counties, Northwest Montana (open access)

Uranium Hydrogeochemical and Stream Sediment Reconnaissance in Lincoln and Flathead Counties, Northwest Montana

From abstract: Between mid-May and late June 1976, 3409 water and water-transported sediment samples were collected from 1781 locations spread over an approximate 17 000 kilometer area of northwestern Montana. All of the samples were analyzed for total uranium at the LASL, using standardized procedures and rigorous quality controls--the waters by fluorometry and the sediment (and those waters with >10 parts per billion uranium) by delayed-neutron counting methods.
Date: May 1977
Creator: Aamodt, Paul L.
Object Type: Report
System: The UNT Digital Library