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24,769 - 24,791 of
24,791
Vibration Control in Accelerators
In the vast majority of accelerator applications, ground vibration amplitudes are well below tolerable magnet jitter amplitudes. In these cases, it is necessary and sufficient to design a rigid magnet support structure that does not amplify ground vibration. Since accelerator beam lines are typically installed at an elevation of 1-2m above ground level, special care has to be taken in order to avoid designing a support structure that acts like an inverted pendulum with a low resonance frequency, resulting in untolerable lateral vibration amplitudes of the accelerator components when excited by either ambient ground motion or vibration sources within the accelerator itself, such as cooling water pumps or helium flow in superconducting magnets. In cases where ground motion amplitudes already exceed the required jiter tolerances, for instance in future linear colliders, passive vibration damping or active stabilization may be considered.
Date:
January 1, 2011
Creator:
Montag, C.
Object Type:
Book
System:
The UNT Digital Library
Victorio Peak Quadrangle
Satellite image topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
2011
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Voronoi Tessellations and Their Application to Climate and Global Modeling
We review the use of Voronoi tessellations for grid generation, especially on the whole sphere or in regions on the sphere. Voronoi tessellations and the corresponding Delaunay tessellations in regions and surfaces on Euclidean space are defined and properties they possess that make them well-suited for grid generation purposes are discussed, as are algorithms for their construction. This is followed by a more detailed look at one very special type of Voronoi tessellation, the centroidal Voronoi tessellation (CVT). After defining them, discussing some of their properties, and presenting algorithms for their construction, we illustrate the use of CVTs for producing both quasi-uniform and variable resolution meshes in the plane and on the sphere. Finally, we briefly discuss the computational solution of model equations based on CVTs on the sphere.
Date:
January 1, 2011
Creator:
Ju, Lili; Ringler, Todd & Gunzburger, Max
Object Type:
Text
System:
The UNT Digital Library
Water recovery using waste heat from coal fired power plants.
The potential to treat non-traditional water sources using power plant waste heat in conjunction with membrane distillation is assessed. Researchers and power plant designers continue to search for ways to use that waste heat from Rankine cycle power plants to recover water thereby reducing water net water consumption. Unfortunately, waste heat from a power plant is of poor quality. Membrane distillation (MD) systems may be a technology that can use the low temperature waste heat (<100 F) to treat water. By their nature, they operate at low temperature and usually low pressure. This study investigates the use of MD to recover water from typical power plants. It looks at recovery from three heat producing locations (boiler blow down, steam diverted from bleed streams, and the cooling water system) within a power plant, providing process sketches, heat and material balances and equipment sizing for recovery schemes using MD for each of these locations. It also provides insight into life cycle cost tradeoffs between power production and incremental capital costs.
Date:
January 1, 2011
Creator:
Webb, Stephen W.; Morrow, Charles W.; Altman, Susan Jeanne & Dwyer, Brian P.
Object Type:
Report
System:
The UNT Digital Library
Wayland Quadrangle
Satellite image topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
2011
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Webless Migratory Game Bird Strategic Plan 2011-2015
Texas Parks and Wildlife Department Small Game Program strategic plan for webless migratory birds such as doves for 2011-2015. It outlines the major species of webless migratory game birds that are hunted in Texas and their current conservation and hunting statuses and plans to maintain bird populations and continue to provide recreational hunting opportunities.
Date:
January 2011
Creator:
Texas. Parks and Wildlife Department. Small Game Program.
Object Type:
Book
System:
The Portal to Texas History
West Of Kerrick Quadrangle
Satellite image topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
2011
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
West Tawakoni Quadrangle
Satellite image topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
2011
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
[Western Aerial of Discovery Park]
Aerial photograph of a portion of the University of North Texas campus including Discovery Park and the Zero Energy Lab. The Motorcycle Training Center, Denton Practice Range parking lot is visible in the right side of the photo.
Date:
January 2011
Creator:
United States. Civil Air Patrol.
Object Type:
Photograph
System:
The UNT Digital Library
Western Heritage Day Chuck Wagon Breakfast Gary Fraser and Gary Stephenson Style
Photograph of a chuck wagon-style breakfast of eggs, sausage, bacon, salsa, and jalapeños, all prepared in a cast iron pan. Made for the 2011 Western Heritage Day at Hardin-Simmons University in Abilene, Texas.
Date:
2011
Creator:
Maynard, Shannon Collins
Object Type:
Photograph
System:
The Portal to Texas History
When Texans play, Texas Wins!
Pamphlet detailing distribution of Texas Lottery proceeds for the 2010 fiscal year. Pie chart of funds distribution broken down by section is also included.
Date:
2011
Creator:
Texas Lottery Commission
Object Type:
Pamphlet
System:
The Portal to Texas History
Who's In The Dark: Satellite Based Estimates Of Electrification Rates
A technique has been developed to estimate the percent population having electric power access based on the presence of satellite detected nighttime lighting. A global survey was conducted for the year 2006 using nighttime lights collected by the U.S. Air Force Defense Meteorological Satellite Program (DMSP) in combination with the U.S. Department of Energy Landscan population dataset. The survey includes results for 229 countries and more than 2000 subnational units. The results are compared to reported electrification rates for 87 countries compiled from a variety of sources by the International Energy Agency. The DMSP derived estimate of number of people worldwide who lack access to electricity is 1.62 billion, only slightly larger than the 1.58 billion estimated by the International Energy Agency.
Date:
January 1, 2011
Creator:
Elvidge, Christopher D.; Baugh, Kimberly E.; Sutton, Paul S.; Bhaduri, Budhendra L; Tuttle, Benjamin T.; Ghosh, Tilottama et al.
Object Type:
Book
System:
The UNT Digital Library
The Wildcat, Yearbook of Archer City Schools, 2011
Yearbook for Archer City Elementary, Junior High, and High School in Archer City, Texas includes photos of and information about the school, student body, teachers, clubs, and events. Index starts on page 142.
Date:
2011
Creator:
Archer City High School
Object Type:
Yearbook
System:
The Portal to Texas History
Wind Power Career Chat
This document will teach students about careers in the wind energy industry. Wind energy, both land-based and offshore, is expected to provide thousands of new jobs in the next several decades. Wind energy companies are growing rapidly to meet America's demand for clean, renewable, and domestic energy. These companies need skilled professionals. Wind power careers will require educated people from a variety of areas. Trained and qualified workers manufacture, construct, operate, and manage wind energy facilities. The nation will also need skilled researchers, scientists, and engineers to plan and develop the next generation of wind energy technologies.
Date:
January 1, 2011
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Wind Powering America Initiative (Fact Sheet)
The U.S. Department of Energy's Wind Powering America initiative engages in technology market acceptance, barrier reduction, and technology deployment support activities. This fact sheet outlines ways in which the Wind Powering America team works to reduce barriers to appropriate wind energy deployment, primarily by focusing on six program areas: workforce development, communications and outreach, stakeholder analysis and resource assessment, wind technology technical support, wind power for Native Americans, and federal sector support and collaboration.
Date:
January 1, 2011
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Woman's Wednesday Club Scrapbook, 2011-2012]
Scrapbook for the Woman's Wednesday Club, documenting the activities of the club from 2011 to 2012 through photographs and some text materials.
Date:
2011/2012
Creator:
unknown
Object Type:
Book
System:
The Portal to Texas History
[The Woman's Wednesday Club Scrapbook of Events from 1993-2011]
Scrapbook for the Woman's Wednesday Club in Fort Worth, Texas. The scrapbook contains materials related to the club's events, such as luncheons, club birthday celebrations, and memorial services for members, as well as photographs and newspaper clippings.
Date:
2011~
Creator:
unknown
Object Type:
Book
System:
The Portal to Texas History
[The Woman's Wednesday Club Scrapbook of Events from 2009-2011]
Scrapbook for the Woman's Wednesday Club in Fort Worth, Texas. The scrapbook contains materials related to the club's events, such as luncheons, club birthday celebrations, and memorial services for members, as well as photographs and newspaper clippings.
Date:
2011~
Creator:
unknown
Object Type:
Book
System:
The Portal to Texas History
Women at The Frontline of Climate Change - Gender Risks and Hopes
Women are often in the frontline in respect to the impacts of a changing climate. Globally the world is seeing increasingly frequent droughts and floods which are having economic but also profound social consequences. The women and people of Asia are currently at greatest risk with over 100 million people affected in this region annually.
Date:
2011
Creator:
Nellemann, Christian; Verma, Ritu & Hislop, Lawrence
Object Type:
Text
System:
The UNT Digital Library
Woodland Quadrangle
Satellite image topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
2011
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Your Health Care Guide, 2011
This document contains information on how to access health services provided by Medicaid for the year 2011.
Date:
2011
Creator:
Texas Health and Human Services Commission
Object Type:
Book
System:
The Portal to Texas History
YouTube Commentary: Social Interaction in Online Publics
Paper explores how conversation, particularly interpretation of meaning and tone, occurs in online communities, specifically in Youtube comments.
Date:
2011
Creator:
Lanius, Candice
Object Type:
Article
System:
The UNT Digital Library
Sgt. Gary Schutza
Autobiographical paper of Sgt. Gary Schutza's military service. He briefly describes his family and childhood, his decision to join the United States Marine Corps, and his experiences serving during the Korean War.
Date:
~2011
Creator:
Schutza, Gary
Object Type:
Paper
System:
The Portal to Texas History