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Effects of Various Blowout Panel Configurations on the Structural Response of Los Alamos National Laboratory Building 16-340 to Internal Explosions

Description: Abstract: The risk of accidental detonation is present whenever any type of high explosives processing activity is performed. These activities are typically carried out indoors to protect processing equipment from the weather and to hide possibly secret processes from view. Often, highly strengthened reinforced concrete buildings are employed to house these activities. These buildings may incorporate several design features, including the use of lightweight frangible blowout panels, to help mitigate blast effects. These panels are used to construct walls that are durable enough to withstand the weather, but are of minimal weight to provide overpressure relief by quickly moving outwards and creating a vent area during an accidental explosion. In this study the behavior of blowout panels under various blast loading conditions was examined. External loadings from explosions occurring in nearby rooms were of primary interest. Several reinforcement systems were designed to help blowout panels resist failure from external blast loads while still allowing them to function as vents when subjected to internal explosions. The reinforcements were studied using two analytical techniques, yield-line analysis and modal analysis, and the hydrocode AUTODYN. A blowout panel reinforcement design was created that could prevent panels from being blown inward by external explosions. This design was found to increase the internal loading of the building by 20%, as compared with nonreinforced panels. Nonreinforced panels were found to increase the structural loads by 80% when compared to an open wall at the panel location.
Date: September 2005
Creator: Wilke, Jason P.; Pohs, Keith G. & Plumlee, Deidré A.
Partner: UNT Libraries Government Documents Department

Gas-Driven Microturbine

Description: The present invention is directed to a means of fabricating a gas-driven microturbine that is capable of providing autonomous propulsion in which the rapidly moving gases are directed through a micromachined turbine to power mechanical, electrical, or electromechanical devices by direct mechanical linkage of turbo-electric generator components in a domain ranging from tenths of micrometers to thousands of micrometers. By optimally selecting monopropellants or bipropellants to be the fuel set, a more efficient gas-driven microturbine can be realized from the increased mass flow rate of the gas stream due to the higher combustion reaction energies of these fuel sets. Additionally, compressed gas can be utilized to provide a high-flow gas stream for the gas-driven microturbine. The present invention is adaptable to many defense and non-defense applications, including the provision of mechanical power for miniature devices such as fans, geared mechanisms, mechanical linkages, actuators, bio-medical procedures, manufacturing, industrial, aviation, computers, safety systems, and electrical generators.
Date: July 14, 1999
Creator: Sniegowski, Jeffrey J.; Rodgers, Murray S.; McWhorter, Paul J.; Aeschliman, Daniel P. & Miller, William M.
Partner: UNT Libraries Government Documents Department

Digital Preservation of Newspapers: Findings of the Chronicles in Preservation Project

Description: In this paper, the authors describe research led by Educopia Institute regarding the preservation needs for digitized and born-digital newspapers. The 'Chronicles in Preservation' project, builds upon previous efforts (e.g. the U.S. National Digital Newspaper Program) to look more broadly at the needs of digital newspapers in all of their diverse and challenging forms. This paper conveys the findings of the first research phase, including substantive survey results regarding digital newspaper curation practices.
Date: October 2012
Creator: Skinner, Katherine; Schultz, Matt; Halbert, Martin & Phillips, Mark Edward
Partner: UNT Libraries

Experiment Station Work, [Volume] 66

Description: Bulletin issued by the U. S. Department of Agriculture compiling selected articles from the Agricultural Experiment Stations. This bulletin contains articles on: Lawns, Fertilizing Asparagus, Turnips for Sheep, Loss of Lambs, Cost of Market Milk, Propagation of Starters, and the Plastered Silo.
Date: 1911
Creator: United States. Office of Experiment Stations.
Partner: UNT Libraries Government Documents Department

Experiment Station Work, [Volume] 21

Description: Bulletin issued by the U. S. Department of Agriculture compiling selected articles from the Agricultural Experiment Stations. This bulletin contains articles on: Value of Barnyard Manue, Nitrate of Sode for Market-Garden Crops, Cooking Meat, Sugar-Beet Products, Feeding Horses, Plants Poisonous to Horses, Fattening Beef Catte, Profit from Dairy Cows, Shearing as Affecting Gains Made by Lambs, Soft Pork and Bacon, Purifying Milk, Cheese Prints, Draft of Farm Wagons, and the Disk Plow.
Date: 1903
Creator: United States. Office of Experiment Stations.
Partner: UNT Libraries Government Documents Department

Experiment Station Work, [Volume] [61]

Description: Bulletin issued by the U. S. Department of Agriculture compiling selected articles from the Agricultural Experiment Stations. This bulletin contains articles on: Unusual v. Standard Fertilizers, Symptoms of Disease in Plants, Premature Dropping of Figs, Condimental Feeds, Feeding the Dairy Calf, Defects in Cottage Cheese, and the Iowa Silo.
Date: 1911
Creator: United States. Office of Experiment Stations.
Partner: UNT Libraries Government Documents Department

Terracing for Soil and Water Conservation

Description: This bulletin describes terracing methods that are able to combat soil erosion and conserve water. There are three types of terraces (drainage, absorptive, and bench) and plans, specifications, construction practices are provided in the bulletin.
Date: 1938
Creator: Hamilton, C. L.
Partner: UNT Libraries Government Documents Department

[News Clip: Fashion]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 5:00 P.M.
Date: September 4, 1997
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections