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646 Matching Results
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1-10 Mbar Laser-Driven Shocks Using the Janus Laser Facility
We report preliminary results using the Lawrence Livermore National Laboratory (LLNL) Janus laser facility to generate high pressure laser-driven shocks in the 1-10 Mbar regime. These experiments address various issues, including shock steadiness, planarity, uniformity and low target preheat, important for making precision EOS measurements on a small (E < 250 J) laser facility. A brief description of the experimental techniques, target design and measurements will be given.
Date:
August 10, 2001
Creator:
Dunn, J.; Price, D. F.; Moon, S. J.; Cauble, R. C.; Springer, P. T. & Ng, A.
Object Type:
Article
System:
The UNT Digital Library
14-MeV Neutron Generator Used as a Thermal Neutron Source
One of the most important applications of the general purpose Monte Carlo N-Particle (MCNPS and MCNPX) codes is neutron shielding design. We employed this method to simulate the shield of a 14-MeV neutron generator used as a thermal neutron source providing an external thermal neutron beam for testing large area neutron detectors developed for diffraction studies in biology and also useful for national security applications. Nuclear reactors have been the main sources of neutrons used for scientific applications. In the past decade, however, a large number of reactors have been shut down, and the importance of other, smaller devices capable of providing neutrons for research has increased. At Brookhaven National Laboratory a moderated Am-Be neutron source with shielding is used for neutron detector testing. This source is relatively weak, but provides a constant flux of neutrons, even when not in use. The use of a 14 MeV energized neutron generator, with an order of magnitude higher neutron flux has been considered to replace the Am-Be source, but the higher fast neutron yield requires a more careful design of moderator and shielding. In the present paper we describe a proposed shielding configuration based on Monte Carlo calculations, and provide calculated neutron …
Date:
August 10, 2008
Creator:
Dioszegi, I.
Object Type:
Article
System:
The UNT Digital Library
501(c)(4)s and the Gift Tax: Legal Analysis
This report discusses whether substantial donations to tax-exempt 501(c)(4) organizations are subject to the federal gift tax.
Date:
August 10, 2012
Creator:
Luckey, John R. & Lunder, Erika K.
Object Type:
Report
System:
The UNT Digital Library
The 1970 amendments to the elementary and secondary education act.
This report addresses the 1970 amendments to the elementary and secondary education act.
Date:
August 10, 1972
Creator:
Enright, Sharon
Object Type:
Report
System:
The UNT Digital Library
2001 Gordon Research Conference on Archaea: [Ecology], Metabolism. Final progress report [agenda and attendee list]
The Gordon Research Conference on Archaea: Ecology, Metabolism [and Molecular Biology] was held at Proctor Academy, Andover, New Hampshire, August 5-10, 2001. The conference was attended by 135 participants. The attendees represented the spectrum of endeavor in this field, coming from academia, industry, and government laboratories, and included US and foreign scientists, senior researchers, young investigators, and students. Emphasis was placed on current unpublished research and discussion of the future target areas in this field. There was a conscious effort to stimulate discussion about the key issues in the field today. Session topics included the following: Ecology and genetic elements; Genomics and evolution; Ecology, genomes and gene regulation; Replication and recombination; Chromatin and transcription; Gene regulation; Post-transcription processing; Biochemistry and metabolism; Proteomics and protein structure; Metabolism and physiology. The featured speaker addressed the topic: ''Archaeal viruses, witnesses of prebiotic evolution?''
Date:
August 10, 2001
Creator:
Daniels, Charles
Object Type:
Report
System:
The UNT Digital Library
2012 ELECTRON DONOR-ACCEPTOR INTERACTIONS GORDON RESEARCH CONFERENCE, AUGUST 5-10, 2012
The upcoming incarnation of the Gordon Research Conference on Electron Donor Acceptor Interactions will feature sessions on classic topics including proton-coupled electron transfer, dye-sensitized solar cells, and biological electron transfer, as well as emerging areas such as quantum coherence effects in donor-acceptor interactions, spintronics, and the application of donor-acceptor interactions in chemical synthesis.
Date:
August 10, 2012
Creator:
McCusker, James
Object Type:
Article
System:
The UNT Digital Library
2012 Molecular Basis of Microbial One-Carbon Metabolism Gordon Research Conferences and Gordon Research Seminar, August 4-10,2012
The 2012 Gordon Conference will present and discuss cutting-edge research in the field of microbial metabolism of C1 compounds. The conference will feature the roles and application of C1 metabolism in natural and synthetic systems at scales from molecules to ecosystems. The conference will stress molecular aspects of the unique metabolism exhibited by autotrophic bacteria, methanogens, methylotrophs, aerobic and anaerobic methanotrophs, and acetogens.
Date:
August 10, 2012
Creator:
Hanson, Thomas
Object Type:
Article
System:
The UNT Digital Library
2012 PLANT CELL WALLS GORDON RESEARCH CONFERENCE AND GORDON RESEARCH SEMINAR, AUGUST 4-10, 2012
The sub-theme of this year’s meeting, ‘Cell Wall Research in a Post-Genome World’, will be a consideration of the dramatic technological changes that have occurred in the three years since the previous cell wall Gordon Conference in the area of DNA sequencing. New technologies are providing additional perspectives of plant cell wall biology across a rapidly growing number of species, highlighting a myriad of architectures, compositions, and functions in both "conventional" and specialized cell walls. This meeting will focus on addressing the knowledge gaps and technical challenges raised by such diversity, as well as our need to understand the underlying processes for critical applications such as crop improvement and bioenergy resource development.
Date:
August 10, 2012
Creator:
Rose, Jocelyn
Object Type:
Article
System:
The UNT Digital Library
2012 VIBRATIONAL SPECTROSCOPY GORDON RESEARCH CONFERENCE, AUGUST 5-10, 2012
The Vibrational Spectroscopy conference brings together experimentalists and theoreticians working at the frontiers of modern vibrational spectroscopy, with a special emphasis on spectroscopies that probe the structure and dynamics of molecules in gases, liquids, and at interfaces. The conference explores the wide range of state-of-the-art techniques based on vibrational motion. These techniques span the fields of time-domain, high-resolution frequency-domain, spatially-resolved, nonlinear, and multidimensional spectroscopies. The conference highlights both the application of these techniques in chemistry, materials, biology, the environment, and medicine as well as the development of theoretical models that enable one to connect spectroscopic signatures to underlying molecular motions including chemical reaction dynamics. The conference goal is to advance the field of vibrational spectroscopy by bringing together a collection of researchers who share common interests and who will gain from discussing work at the forefront of several connected areas. The intent is to emphasize the insights and understanding that studies of vibrations provide about a variety of molecular systems ranging from small polyatomic molecules to large biomolecules, nanomaterials, and environmental systems.
Date:
August 10, 2012
Creator:
Geiger, Franz
Object Type:
Article
System:
The UNT Digital Library
Accelerated Vehicle Retirement for Fuel Economy: "Cash for Clunkers"
This report outlines the key provisions of the Consumer Assistance to Recycle and Save (CARS) program, discusses the initial impact of the program and some of the concerns raised by Senators. It also summarizes similar programs in other countries.
Date:
August 10, 2009
Creator:
Yacobucci, Brent D. & Canis, Bill
Object Type:
Report
System:
The UNT Digital Library
Across-the-Board Spending Cuts in Omnibus Appropriations Acts
This report examines the use of across-the-board spending cuts in omnibus appropriations acts for FY2000-FY2004, assessing the budgetary context leading to the spending cut, recounting the legislative action on the spending cut provision, and reviewing the provision’s design and implementation.
Date:
August 10, 2004
Creator:
Keith, Robert
Object Type:
Report
System:
The UNT Digital Library
Actinide removal from aqueous solution with activated magnetite
An actinide aqueous waste treatment process using activated magnetite has been developed at Rocky Flats. The use and effectiveness of various magnetites in lowering actinide concentrations in aqueous solution are described. Experiments indicate that magnetite particle size and pretreatment (activation of the magnetite surface with hydroxyl ions greatly influence the effective use of magnetite as an actinide adsorbent. With respect to actinide removal, Ba(OH)/sub 2/-activated magnetite was more effective over a broader pH range than was NaOH-activated magnetite. About 50% less Ba(OH)/sub 2/-activated magnetite was required to lower plutonium concentration from 10/sup -4/ to 10/sup -8/ g/l. 7 refs., 8 tabs.
Date:
August 10, 1987
Creator:
Kochen, R.L. & Thomas, R.L. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Additional Results on the Static Longitudinal and Lateral Stability Characteristics of a 0.05-Scale Model of the Convair F2Y-1 Airplane at High Subsonic Speeds
"Additional results on the static longitudinal and lateral stability characteristics of a 0.05-scale model of the Convair F2Y-1 water-based fighter airplane were obtained in the Langley high-speed 7- by 10-foot tunnel over a Mach number range of 0.50 to 0.92. The maximum angle-of-attack range (obtained at the lower Mach numbers) was from -2 degrees to 25 degrees. The sideslip-angle range investigated was from -4 degrees to 12 degrees" (p. 1).
Date:
August 10, 1954
Creator:
Spreeman, Kenneth P. & Few, Albert G., Jr.
Object Type:
Report
System:
The UNT Digital Library
Advance Earned Income Tax Credit: Low Use and Small Dollars Paid Impede IRS's Efforts to Reduce High Noncompliance
A letter report issued by the Government Accountability Office with an abstract that begins "The Advance Earned Income Tax Credit (AEITC) allows individuals to receive a portion of the Earned Income Tax Credit (EITC) in their paychecks, instead of receiving all of it when filing their year-end tax return. Limited research has been conducted on the AEITC since GAO last examined it in the early 1990s. GAO was asked to determine (1) how many individuals received the AEITC compared with the EITC in tax years 2002 through 2004, what actions, if any, have been taken to increase use, and the potential for increases in use in the future; (2) the extent of noncompliance, if any, associated with the AEITC; and (3) how well the Internal Revenue Service's (IRS) procedures address the areas of noncompliance. To address these questions, GAO analyzed Forms W-2 and tax return data and interviewed IRS and Social Security Administration (SSA) officials."
Date:
August 10, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
The Advanced Technology Program
The Advanced Technology Program (ATP) was created by P.L. 100-418, the Omnibus Trade and Competitiveness Act of 1988, to encourage public-private cooperation in the development of pre-competitive technologies with broad application across industries. This activity has been targeted for elimination as a means to cut federal spending. This report discusses the ATP and related issues of federal appropriations (or the lack thereof).
Date:
August 10, 1999
Creator:
Schacht, Wendy H.
Object Type:
Report
System:
The UNT Digital Library
Advantages of Glass Microballoons as Filler Material
This report is about the Advantages of Glass Micro-balloons as Filler Material
Date:
August 10, 1960
Creator:
Walterbach, F. R.
Object Type:
Report
System:
The UNT Digital Library
Age-related changes in the plasticity and toughness of human cortical bone at multiple length-scales
The structure of human cortical bone evolves over multiple length-scales from its basic constituents of collagen and hydroxyapatite at the nanoscale to osteonal structures at nearmillimeter dimensions, which all provide the basis for its mechanical properties. To resist fracture, bone’s toughness is derived intrinsically through plasticity (e.g., fibrillar sliding) at structural-scales typically below a micron and extrinsically (i.e., during crack growth) through mechanisms (e.g., crack deflection/bridging) generated at larger structural-scales. Biological factors such as aging lead to a markedly increased fracture risk, which is often associated with an age-related loss in bone mass (bone quantity). However, we find that age-related structural changes can significantly degrade the fracture resistance (bone quality) over multiple lengthscales. Using in situ small-/wide-angle x-ray scattering/diffraction to characterize sub-micron structural changes and synchrotron x-ray computed tomography and in situ fracture-toughness measurements in the scanning electron microscope to characterize effects at micron-scales, we show how these age-related structural changes at differing size-scales degrade both the intrinsic and extrinsic toughness of bone. Specifically, we attribute the loss in toughness to increased non-enzymatic collagen cross-linking which suppresses plasticity at nanoscale dimensions and to an increased osteonal density which limits the potency of crack-bridging mechanisms at micron-scales. The link between these …
Date:
August 10, 2011
Creator:
Zimmermann, Elizabeth A.; Schaible, Eric; Bale, Hrishikesh; Barth, Holly D.; Tang, Simon Y.; Reichert, Peter et al.
Object Type:
Article
System:
The UNT Digital Library
Air Force BRAC 2005 Candidate Recommendation Revision
Disregard Header and Footer Restriction: Air Force BRAC 2005 Candidate Recommendation Revision USAF 0129, Realign Martin State APT AGS Martin State APT AGS, Baltimore, MD.
Date:
August 10, 2005
Creator:
United States. Department of Defense.
Object Type:
Text
System:
The UNT Digital Library
Alloy Thin-films and Surfaces for New Materials. Final Report
Within the framework of a DOE National Laboratory/EPSCoR state partnership, investigations by researchers at Louisiana State University and Oak Ridge National Laboratory were focused on revealing the unique nanophase properties of alloy thin-films and bimetallic surfaces. Employing a number of experimental preparation techniques and characterization probes (synchrotron-based angle-resolved and valence/core-level PES and variable-temperature STM/STS), the goal of this program was to elucidate of the interconnecting physical and chemical properties of a variety of alloy surfaces and thin-films, specifically, determining the correlation between atomic structure/composition, electronic structure, and catalytic/chemisorption properties of these nanoscale.
Date:
August 10, 2003
Creator:
Sprunger, P. T.
Object Type:
Report
System:
The UNT Digital Library
Alternatives to conventional diesel fuel-some potential implications of California's TAC decision on diesel particulate.
Limitations on the use of petroleum-based diesel fuel in California could occur pursuant to the 1998 declaration by California's Air Resources Board (CARB) that the particulate matter component of diesel exhaust is a carcinogen, therefore a toxic air contaminant (TAC) subject to provisions of the state's Proposition 65. It is the declared intention of CARB not to ban or restrict diesel fuel, per se, at this time. Assuming no total ban, Argonne National Laboratory (ANL) explored two feasible ''mid-course'' strategies. (1) Increased penetration of natural gas and greater gasoline use in the transportation fuels market, to the extent that some compression-ignition (CI) applications revert to spark-ignition (SI) engines. (2) New specifications requiring diesel fuel reformulation based on exhaust products of individual diesel fuel constituents. Each of these alternatives results in some degree of (conventional) diesel displacement. In the first case, diesel fuel is assumed admissible for ignition assistance as a pilot fuel in natural gas (NG)-powered heavy-duty vehicles, and gasoline demand in California increases by 32.2 million liters per day overall, about 21 percent above projected 2010 baseline demand. Natural gas demand increases by 13.6 million diesel liter equivalents per day, about 7 percent above projected (total) consumption level. In …
Date:
August 10, 1999
Creator:
Eberhardt, J. J.; Rote, D. M.; Saricks, C. L. & Stodolsky, F.
Object Type:
Article
System:
The UNT Digital Library
Amusement Apparatus
Patent for a fishing game for amusement parks which has a canal of liquid agitated to form a current with pictures of fish in it that when caught get the person fishing different prizes depending on the symbol they have on them.
Date:
August 10, 1909
Creator:
Pressey, Charles A.
Object Type:
Patent
System:
The Portal to Texas History
Analysis of High-Fold Gamma Data
Historically, {gamma}-{gamma} and {gamma}-{gamma}-{gamma} coincidence spectra were utilized to build nuclear level schemes. With the development of large detector arrays, it has became possible to analyze higher fold coincidence data sets. This paper briefly reports on software to analyze 4-fold coincidence data sets that allows creation of 4-fold histograms (hypercubes) of at least 1024 channels per side (corresponding to a 43 gigachannel data space) that will fit onto a few gigabytes of disk space, and extraction of triple-gated spectra in a few seconds. Future detector arrays may have even higher efficiencies, and detect an many as 15 or 20 {gamma} rays simultaneously; such data will require very different algorithms for storage and analysis. Difficulties inherent in the analysis of such data are discussed, and two possible new solutions are presented, namely adaptive list-mode systems and list-list-mode storage.
Date:
August 10, 1998
Creator:
Beyer, C.J.; Cromaz, M. & Radford, D.C.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Ignition Testing on K-West Basin Fuel
Approximately 2100 metric tons of spent nuclear fuel (SNF) discharged from the N-Reactor have been stored underwater at the K-Basins in the 100 Area of the Hanford Site. The spent fuel has been stored in the K-East Basin since 1975 and in the K-West Basin since 1981. Some of the SNF elements in these basins have corroded because of various breaches in the Zircaloy cladding that occurred during fuel discharge operations and/or subsequent handling and storage in the basins. Consequently, radioactive material in the fuel has been released into the basin water, and water has leaked from the K-East Basin into the soil below. To protect the Columbia River, which is only 380 m from the basins, the SNF is scheduled to be removed and transported for interim dry storage in the 200 East Area, in the central portion of the Site. However, before being shipped, the corroded fuel elements will be loaded into Multi-Canister OverPacks and conditioned. The conditioning process will be selected based on the Integrated Process Strategy (IPS) (WHC 1995), which was prepared on the basis of the dry storage concept developed by the Independent Technical Assessment (ITA) team (ITA 1994).
Date:
August 10, 1999
Creator:
Abrefah, J.; Huang, F.H.; Gerry, W.M.; Gray, W.J.; Marschman, S.C. & Thornton, T.A.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Ignition Testing on K-West Basin Fuel
Ignition tests and analyses of damage/corroded N-Reactor spent nuclear fuel (SNF) were performed by Pacific Northwest National Laboratory as part of a series of studies on the deteriorating spent fuel in the Hanford K-Basins. The ignition temperature tests were conducted to assess tie pyrophoric properties of selected spent fuel elements from K-West Basin. The objective of these tests was to determine pyrophoric characteristics of samples cut from both damaged and undamaged regions of fhel elements. Furnace ignition tests were also petiormed on samples subjected to the conditioning process proposed by the Independent Technical Assessment and the Integrated Process Strategy to establish any significant effect on the SNF pyrophoric pefiormance parameters. Part of the analysis of the ignition data in this report was petiormed by FIuor Daniel Northwest. One of the safety issues being evaluated is the possibility of a fiel ignition during processing, handling, and transportation to the interim storage facility.
Date:
August 10, 1999
Creator:
Abrefah, John; Huang, Fan-Hsiung F.; Gerry, William M.; Gray, Walter J.; Marschman, Steven C. & Thornton, Thomas A.
Object Type:
Report
System:
The UNT Digital Library