Language

11 Matching Results

Results open in a new window/tab.

Opportunities for Saving Energy and Improving Air Quality in Urban Heat Islands (open access)

Opportunities for Saving Energy and Improving Air Quality in Urban Heat Islands

World energy use is the main contributor to atmospheric CO2. In 2002, about 7.0 giga metric tons of carbon (GtC) were emitted internationally by combustion of gas, liquid, and solid fuels (CDIAC, 2006), 2 to 5 times the amount contributed by deforestation (Brown et al., 1988). The share of atmospheric carbon emissions for the United States from fossil fuel combustion was 1.6 GtC. Increasing use of fossil fuel and deforestation together have raised atmospheric CO{sub 2} concentration some 25% over the last 150 years. According to global climate models and preliminary measurements, these changes in the composition of the atmosphere have already begun raising the Earth's average temperature. If current energy trends continue, these changes could drastically alter the Earth's temperature, with unknown but potentially catastrophic physical and political consequences. During the last three decades, increased energy awareness has led to conservation efforts and leveling of energy consumption in the industrialized countries. An important byproduct of this reduced energy use is the lowering of CO{sub 2} emissions. Of all electricity generated in the United States, about one-sixth is used to air-condition buildings. The air-conditioning use is about 400 tera-watt-hours (TWh), equivalent to about 80 million metric tons of carbon (MtC) …
Date: July 1, 2007
Creator: Akbari, Hashem
System: The UNT Digital Library
Soil Survey of Hamilton County, Texas (open access)

Soil Survey of Hamilton County, Texas

Text describes the area, climate, agricultural history and statistics, soil-survey methods and definitions, soils and crops, land uses and agricultural methods, irrigation, and morphology and genesis of soils of Hamilton County, Texas.
Date: July 2007
Creator: United States. Natural Resources Conservation Service.
System: The Portal to Texas History
Role of C and P Sites on the Chemical Activity of Metal Carbide and Phosphides: From Clusters to Single-Crystal Surfaces (open access)

Role of C and P Sites on the Chemical Activity of Metal Carbide and Phosphides: From Clusters to Single-Crystal Surfaces

Transition metal carbides and phosphides have shown tremendous potential as highly active catalysts. At a microscopic level, it is not well understood how these new catalysts work. Their high activity is usually attributed to ligand or/and ensemble effects. Here, we review recent studies that examine the chemical activity of metal carbide and phosphides as a function of size, from clusters to extended surfaces, and metal/carbon or metal/phosphorous ratio. These studies reveal that the C and P sites in these compounds cannot be considered as simple spectators. They moderate the reactivity of the metal centers and provide bonding sites for adsorbates.
Date: July 1, 2007
Creator: Rodriguez, J. A.; Vines, F.; Liu, P. & Illas, F.
System: The UNT Digital Library

Oral History Interview with Dolphus Edward Rowan, July 17, 2007

Access: Use of this item is restricted to the UNT Community
Interview with Ed Rowan, a Army Air Corps WWII veteran from Gadsden, Alabama. Rowan discusses his family background, education, work, purchasing an airplane, flying over the the wreck of the Hindenburg, joining the National Guard and flying coastal patrols, becoming a bomber pilot, his B-17 crew, the various missions they flew in the European Theater, fighters, flak, equipment, tactics, leaving the service, and working as an airline pilot. In appendix is a photo of Rowan's civilian plane, his Distinguished Flying Cross citation, his appointment to the Reserves, a list of missions, flight logs, and a fact sheet about the 381st Bomb Group,
Date: July 17, 2007
Creator: Hegi, Benjamin & Rowan Jr., Dolphus Edward
System: The UNT Digital Library
Nuclear Reactions for Astrophysics (open access)

Nuclear Reactions for Astrophysics

None
Date: July 5, 2007
Creator: J.Thompson, I & Nunes, F
System: The UNT Digital Library
Catalog of the University of North Texas, 2007-2008, Undergraduate (open access)

Catalog of the University of North Texas, 2007-2008, Undergraduate

The UNT Undergraduate Bulletin includes information about class offerings as well as general information about the university (academic calendar, admissions and degree requirements, financial information, etc.) about research, and about the colleges and schools on campus. Index starts on page 544.
Date: July 2007
Creator: University of North Texas
System: The UNT Digital Library
Catalog of the University of North Texas, 2007-2008, Graduate (open access)

Catalog of the University of North Texas, 2007-2008, Graduate

The UNT Graduate Bulletin includes information about class offerings as well as general information about the university (academic calendar, admissions and degree requirements, financial information, etc.) about research, and about the colleges and schools on campus. Index starts on page 455.
Date: July 2007
Creator: University of North Texas
System: The UNT Digital Library
[News Story Log: July 1 to December 31, 2007] (open access)

[News Story Log: July 1 to December 31, 2007]

Logbook from the KXAS-TV/NBC station in Fort Worth, Texas, documenting the names, locations, and run-times of video-taped news segments that aired each day from July through December in 2007.
Date: 2007-07/2007-12
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
System: The UNT Digital Library
Waxahachie Independent School District June 2007 (open access)

Waxahachie Independent School District June 2007

This report reviews the management and performance of the Waxahachie Independent School District's (WISD's) educational, financial, and operational functions.
Date: July 9, 2007
Creator: Texas. Legislative Budget Board.
System: The Portal to Texas History
FCC Record, Volume 22, No. 17, Pages 12683 to 13387, July 9 - July 20, 2007 (open access)

FCC Record, Volume 22, No. 17, Pages 12683 to 13387, July 9 - July 20, 2007

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: July 2007
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library
FCC Record, Volume 22, No. 15, Pages 11424 to 12103, June 25 - July 6, 2007 (open access)

FCC Record, Volume 22, No. 15, Pages 11424 to 12103, June 25 - July 6, 2007

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: July 2007
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library