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Results:
1,633 - 1,646 of
1,646
Thermal Storage and Advanced Heat Transfer Fluids (Fact Sheet)
Fact sheet describing NREL CSP Program capabilities in the area of thermal storage and advanced heat transfer fluids: measuring thermophysical properties, measuring fluid flow and heat transfer, and simulating flow of thermal energy and fluid.
Date:
August 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Towards an Understanding of the Role of Aragonite in the Mechanical Properties of Nacre
Nacre, also known as mother-of-pearl, is a biocomposite material that exhibits higher strength and fracture toughness than its component materials. It derives its strength from the brick-and-mortar layering of aragonite (CaCO{sub 3}) platelets and organic binder. It is believed that the protein binder helps redistribute the stress throughout all tablets for optimal mechanical performance. In this study, we attempt to measure the mechanical properties of aragonite within nacre and compare them to bulk aragonite and bulk nacre and understand the redistribution of stresses. Here we show that x-ray diffraction techniques are useful for isolating and measuring strain of crystallites within a composite material. Our results show that the apparent stiffness of aragonite varies with crystallographic directions and is higher than the stiffness of bulk nacre in all cases, meaning that aragonite tablets are exposed to less than the average bulk stress. The average force applied to the bulk sample is partitioned between the aragonite and the binder, so that the protein layer bears as much as 27.2% of the total applied force. Different crystallographic directions exhibit behaviors different than bulk aragonite or bulk nacre. These are related to texture of aragonite platelets (i.e. preferred orientations within nacre). By examining nacre, …
Date:
August 25, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Turning Bacteria into Biofuel: Development of an Integrated Microbial Electrocatalytic (MEC) System for Liquid Biofuel Production from CO2
Electrofuels Project: LBNL is improving the natural ability of a common soil bacteria called Ralstonia eutropha to use hydrogen and carbon dioxide for biofuel production. First, LBNL is genetically modifying the bacteria to produce biofuel at higher concentrations. Then, LBNL is using renewable electricity obtained from solar, wind, or wave power to produce high amounts of hydrogen in the presence of the bacteria—increasing the organism’s access to its energy source and improving the efficiency of the biofuel-creation process. Finally, LBNL is tethering electrocatalysts to the bacteria’s surface which will further accelerate the rate at which the organism creates biofuel. LBNL is also developing a chemical method to transform the biofuel that the bacteria produce into ready-to-use jet fuel.
Date:
August 1, 2010
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
The U.S. House of Representatives Apportionment Formula in Theory and Practice
None
Date:
August 4, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Universal Service Fund: Background and Options for Reform
None
Date:
August 20, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
University of Nevada Las Vegas LED Display Engineering
The primary objective of this part of the project is to develop and implement a method that compensates for the inefficiency of the green LED. The proposed engineering solution which will be the backbone of this project will be to use RGBW combination in every pixel to save energy. Two different RGBW geometrical pixel configurations will be implemented and compared against traditional LED configurations. These configurations will be analyzed for energy efficiency while keeping the quality of the display the same. Cost of the addition of white LEDs to displays along with energy cost savings will be presented and analyzed.
Date:
August 31, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Unlawful Internet Gambling Enforcement Act (UIGEA) and Its Implementing Regulations
None
Date:
August 27, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Wind Energy Ordinances (Fact Sheet)
Due to increasing energy demands in the United States and more installed wind projects, rural communities and local governments with limited or no experience with wind energy now have the opportunity to become involved in this industry. Communities with good wind resources may be approached by entities with plans to develop the resource. Although these opportunities can create new revenue in the form of construction jobs and land lease payments, they also create a new responsibility on the part of local governments to create ordinances to regulate wind turbine installations. Ordinances are laws, often found within municipal codes that provide various degrees of control to local governments. These laws cover issues such as zoning, traffic, consumer protection, and building codes. Wind energy ordinances reflect local needs and wants regarding wind turbines within county or city lines and aid the development of safe facilities that will be embraced by the community. Since 2008 when the National Renewable Energy Laboratory released a report on existing wind energy ordinances, many more ordinances have been established throughout the United States, and this trend is likely to continue in the near future as the wind energy industry grows. This fact sheet provides an overview of …
Date:
August 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Wind for Schools Project Curriculum Brief (Fact Sheet)
The U.S. Department of Energy's (DOE's) 20% Wind Energy by 2030 report recommends expanding education to ensure a trained workforce to meet the projected growth of the wind industry and deployment. Although a few U.S. higher education institutions offer wind technology education programs, most are found in community and technical colleges, resulting in a shortage of programs preparing highly skilled graduates for wind industry careers. Further, the United States lags behind Europe (which has more graduate programs in wind technology design and manufacturing) and is in danger of relinquishing the economic benefits of domestic production of wind turbines and related components and services to European countries. DOE's Wind Powering America initiative launched the Wind for Schools project to develop a wind energy knowledge base among future leaders of our communities, states, and nation while raising awareness about wind energy's benefits. This fact sheet provides an overview of wind energy curricula as it relates to the Wind for Schools project.
Date:
August 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Wind Resource Assessments and Mapping; Knowing and Showing Where the Wind Resource Can be Found (Fact Sheet)
This fact sheet describes wind resource assessments and mapping conducted at the NWTC.
Date:
August 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Wynnewood Gazette (Wynnewood, Okla.), Vol. 108, No. 19, Ed. 1 Thursday, August 5, 2010
Weekly newspaper from Wynnewood, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 5, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Wynnewood Gazette (Wynnewood, Okla.), Vol. 108, No. 20, Ed. 1 Thursday, August 12, 2010
Weekly newspaper from Wynnewood, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 12, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Wynnewood Gazette (Wynnewood, Okla.), Vol. 108, No. 21, Ed. 1 Thursday, August 19, 2010
Weekly newspaper from Wynnewood, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 19, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Wynnewood Gazette (Wynnewood, Okla.), Vol. 108, No. 22, Ed. 1 Thursday, August 26, 2010
Weekly newspaper from Wynnewood, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History