UNT Libraries Government Documents Department - 472 Matching Results

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open access

A 1-Joule laser for a 16-fiber injection system

Description: A 1-J laser was designed to launch light down 16, multi-mode fibers (400-{micro}m-core dia.). A diffractive-optic splitter was designed in collaboration with Digital Optics Corporation (DOC), and was delivered by DOC. Using this splitter, the energy injected into each fiber varied <1%. The spatial profile out of each fiber was such that there were no ''hot spots,'' a flyer could successfully be launched and a PETN pellet could be initiated. Preliminary designs of the system were driven by sy… more
Date: April 6, 2004
Creator: Honig, J.
open access

100% foundry compatible packaging and full wafer release and die separation technique for surface micromachined devices

Description: A completely foundry compatible chip-scale package for surface micromachines has been successfully demonstrated. A pyrex (Corning 7740) glass cover is placed over the released surface micromachined die and anodically bonded to a planarized polysilicon bonding ring. Electrical feedthroughs for the surface micromachine pass underneath the polysilicon sealing ring. The package has been found to be hermetic with a leak rate of less than 5 x 10{sup {minus}8} atm cm{sup {minus}3}/s. This technology h… more
Date: April 6, 2000
Creator: Oliver, Andrew D. & Matzke, Carolyn M.
open access

2010 Census: Preliminary Lessons Learned Highlight the Need for Fundamental Reforms

Description: Testimony issued by the Government Accountability Office with an abstract that begins "GAO added the 2010 Census to its list of high-risk programs in 2008 in part because of (1) long-standing weaknesses in the Census Bureau's (Bureau) information technology (IT) acquisition and contract management function, (2) difficulties in developing reliable life-cycle cost estimates, and (3) key operations that were not tested under operational conditions. These issues jeopardized the Bureau's readiness f… more
Date: April 6, 2011
Creator: United States. Government Accountability Office.
open access

Adam Walsh Child Protection and Safety Act: A Legal Analysis

Description: This report summarizes and describes the history of the Adam Walsh Child Protection and Safety Act. Moreover, this report divides the act into four categories: a revised sex offender registration system, child and sex related amendments to federal criminal procedure, child protective grant programs, and punitive initiatives against sex offenders. The report examines each of these provisions of the bill to effectively summarize it, and gives the reader the information to find an available abridg… more
Date: April 6, 2007
Creator: Doyle, Charles
open access

Aerodynamics of slender bodies at Mach number of 3.12 and Reynolds numbers from 2 x 10(exp 6) to 15 x 10(exp 6) 3: boundary layer and force measurements on a slender cone-cylinder body of revolution

Description: Report presenting an experimental investigation to determine the aerodynamic characteristics of a slender cone-cylinder body of revolution in the 1- by 1-foot supersonic wind tunnel. Viscous drag and three component forces were measured at Mach number 3.12 and a range of Reynolds numbers and angles of attack. Results regarding pressure distributions, boundary layer, and forces are provided.
Date: April 6, 1953
Creator: Jack, John R.
open access

Afghanistan Casualties: Military Forces and Civilians

Description: This report collects statistics from a variety of sources on casualties sustained during Operation Enduring Freedom (OEF), which began on October 7, 2001, and is ongoing. OEF actions take place primarily in Afghanistan; however, OEF casualties also includes American casualties in Pakistan, Uzbekistan, Guantanamo Bay (Cuba), Djibouti, Eritrea, Ethiopia, Jordan, Kenya, Kyrgyzstan, the Philippines, Seychelles, Sudan, Tajikistan, Turkey, and Yemen.
Date: April 6, 2011
Creator: Chesser, Susan G.
open access

Afghanistan: Post-War Governance, Security, and U.S. Policy

Description: The United States and its allies are helping Afghanistan emerging from more than 22 years of warfare, although substantial risk to Afghan stability remains. Before the U.S. military campaign against the orthodox Islamist Taliban movement began on October 7, 2001, Afghanistan had been mired in conflict since the Soviet invasion of Afghanistan in 1979. The defeat of the Taliban has enabled the United States and its coalition partners to send forces throughout Afghanistan to search for Taliban and… more
Date: April 6, 2006
Creator: Katzman, Kenneth
open access

The Age of Human Cerebral Cortex Neurons

Description: The traditional static view of the adult mammalian brain has been challenged by the realization of continuous generation of neurons from stem cells. Based mainly on studies in experimental animals, adult neurogenesis may contribute to recovery after brain insults and decreased neurogenesis has been implicated in the pathogenesis of neurological and psychiatric diseases in man. The extent of neurogenesis in the adult human brain has, however, been difficult to establish. We have taken advantage … more
Date: April 6, 2006
Creator: Bhardwaj, R. D.; Curtis, M. A.; Spalding, K. L.; Buchholz, B. A.; Fink, D.; Bjork-Eriksson, T. et al.
open access

Air Pollution: EPA Should Improve Oversight of Emissions Reporting by Large Facilities

Description: A letter report issued by the General Accounting Office with an abstract that begins "The Environmental Protection Agency (EPA) performs limited oversight of states' processes for verifying the accuracy of large industrial facilities' emissions reports. EPA's data show that most emissions determinations from large sources are based on generic emissions factors. Although EPA allows facilities to estimate their emissions in this manner, EPA officials generally consider direct methods to be more r… more
Date: April 6, 2001
Creator: United States. General Accounting Office.
open access

ALARA Analysis for Shippingport Pressurized Water Reactor Core 2 Fuel Storage in the Canister Storage Building (CSB)

Description: The addition of Shippingport Pressurized Water Reactor (PWR) Core 2 Blanket Fuel Assembly storage in the Canister Storage Building (CSB) will increase the total cumulative CSB personnel exposure from receipt and handling activities. The loaded Shippingport Spent Fuel Canisters (SSFCs) used for the Shippingport fuel have a higher external dose rate. Assuming an MCO handling rate of 170 per year (K East and K West concurrent operation), 24-hr CSB operation, and nominal SSFC loading, all work crew… more
Date: April 6, 2000
Creator: LEWIS, M.E.
open access

Altitude Starting Characteristics of an Afterburner With Autoignition and Hot-Streak Ignition

Description: "Ignition of the fuel-air mixture in an afterburner of turbojet engine at altitude has often proved to be a different problem to solve. Electrical ignition has not proven satisfactory because of the unreliability of such systems (ref. 1). The ignition data reported herein were obtained for two after-burner configurations. Autoignition data are included for both configurations and hot-streak-ignition data, for only one. "
Date: April 6, 1953
Creator: Renas, P. E.; Harvey, R. W., Sr. & Jansen, E. T.
open access

An Analysis of Air-turborocket Engine Performance Including Effects of Component Changes

Description: Report presenting analytical estimates of the thrust, efficiency, drag, and weight of the air-turborocket engine. The effects of changes in the engine components on design and off-design performance are emphasized. Results regarding the performance, effect of design parameters, effect of subsonic cruising Mach number, geometry variations, engine weight estimates, and comparison with turbojet engines are provided.
Date: April 6, 1956
Creator: Luidens, Roger W. & Weber, Richard J.
open access

Analysis of NSWC quasi-static compaction data for porous beds of ball powder, melamine, and Teflon, using structural compaction model

Description: A structural compaction model is used to correlate NSWC quasi-static compaction data on porous beds of six (6) different materials, i.e., four (4) ball powders, melamine, and Teflon. Initial densities of the porous beds ranged from 44 percent solid theoretical maximum density (TMD) to 70 percent TMD. Maximum compacted densities were about 90 percent TMD except for Teflon which was compacted to approximately 98 percent TMD. Pressures calculated by the model, plotted as a function of percent TMD,… more
Date: April 6, 1983
Creator: Weston, A. M. & Lee, E. L.
open access

Analysis of technetium in SRP uranium product streams

Description: Technetium (Tc) is a major fission product with a fission yield similar to {sup 90}Sr and {sup 137}Cs. All traces of the natural element have disappeared due to decay over the earth`s history. The major isotope present in cooled nuclear fuel is {sup 99}Tc with a half life of 2.12 {times} 10{sup 5} years. This isotope decays via low energy (0.292 Mev) beta emission which is easily absorbed and contributes little penetrating radiation hazards in fuel reprocessing. Because it is difficult to detec… more
Date: April 6, 1984
Creator: Orebaugh, E. G.
open access

The Aquatic Resources Trust Fund

Description: This report details sources of funding for the Aquatic Resources Trust Fund's two accounts - the Sport Fish Restoration Account and the Boat Safety Account - and summarizes the various programs and activities receiving funding from the trust fund.
Date: April 6, 2005
Creator: Buck, Eugene H.
open access

Assessing impacts of climate change on forests: The state of biological modeling

Description: Models that address the impacts to forests of climate change are reviewed by four levels of biological organization: global, regional or landscape, community, and tree. The models are compared as to their ability to assess changes in greenhouse gas flux, land use, maps of forest type or species composition, forest resource productivity, forest health, biodiversity, and wildlife habitat. No one model can address all of these impacts, but landscape transition models and regional vegetation and la… more
Date: April 6, 1993
Creator: Dale, V. H. & Rauscher, H. M.
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