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22,308 Matching Results
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SIAM Workshop on Combinatorial Scientific Computing February 27-28, 2004 San Francisco, CA
None
Date:
October 4, 2004
Creator:
/a, n
System:
The UNT Digital Library
Greenidge Multi-Pollutant Control Project (Part 2)
The digital full text of this report is divided into two parts. This part of the report contains five and a half of the twelve appendices of the report.
Date:
October 18, 2008
Creator:
960446, See OSTI ID
System:
The UNT Digital Library
Greenidge Multi-Pollutant Control Project (Part 3)
None
Date:
October 18, 2008
Creator:
960446, See OSTI ID Number
System:
The UNT Digital Library
RIKEN/RBRC Workshop: future Directions in High Energy QCD
None
Date:
October 20, 2011
Creator:
A., Baltz
System:
The UNT Digital Library
Pre-conceptual Design of a Rapid Cycling Medical Synchrotron
N/A
Date:
October 1, 1999
Creator:
A., Favale; Myers, T.; Rathke, J.; Sredniawski, J.; Todd, A.; Barton, D. et al.
System:
The UNT Digital Library
IBS and Expected Luminosity Performance For RHIC Beams At Top Energy With 56 MHz SRF Cavity
N/A
Date:
October 1, 2008
Creator:
A., Fedotov
System:
The UNT Digital Library
RHIC Performance with 56 MHz RF and Gold Ion Beams Pre-cooled at Lower Energy
N/A
Date:
October 1, 2008
Creator:
A., Fedotov
System:
The UNT Digital Library
Depressed electron collector for the Gatling Gun Test Stand
N/A
Date:
October 24, 2013
Creator:
A., Pikin; Ben-Zvi, Ilan; Chang, X. Y.; Gassner, D.; Litvinenko, V.; Rahman, O. et al.
System:
The UNT Digital Library
FFAG Accelerator Proton Driver for Neutrino Factory
N/A
Date:
October 1, 2005
Creator:
A., Ruggiero
System:
The UNT Digital Library
The RHIC polarized source upgrade
N/A
Date:
October 15, 2013
Creator:
A., Zelenski; Atoian, G.; Ritter, J.; Steski, D.; Davydenko, V.; Ivanov, A. et al.
System:
The UNT Digital Library
HYDROTHERMAL ALTERATION OF CONCRETE: YUCCA MOUNTAIN REPOSITORY ANALOGUES
None
Date:
October 1, 1997
Creator:
A.MEIKE, K.B. MYERS
System:
The UNT Digital Library
PROPOSAL FOR A SILICON VERTEX TRACKER (VTX) FOR THE PHENIX EXPERIMENT
We propose the construction of a Silicon Vertex Tracker (VTX) for the PHENIX experiment at RHIC. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometers. Our prime motivation is to provide precision measurements of heavy-quark production (charm and beauty) in A+A, p(d)+A, and polarized p+p collisions. These are key measurements for the future RHIC program, both for the heavy ion program as it moves from the discovery phase towards detailed investigation of the properties of the dense nuclear medium created in heavy ion collisions, and for the exploration of the nucleon spin-structure functions. In addition, the VTX will also considerably improve other measurements with PHENIX. The main physics topics addressed by the VTX are: (1) Hot and dense strongly interacting matter--(a) Potential enhancement of charm production, (b) Open beauty production, (c) Flavor dependence of jet quenching and QCD energy loss, (d) Accurate charm reference for quarkonium, (e) Thermal dilepton radiation, (f) High p{sub T} phenomena with light flavors above 10-15 GeV/c in p{sub T}, and (g) Upsilon spectroscopy in the e{sup +}e{sup -} decay channel. (2) Gluon spin structure of the nucleon--(a) {Delta}G/G with charm, (b) {Delta}G/G with beauty, and (c) x dependence of {Delta}G/G …
Date:
October 1, 2004
Creator:
AKIBA,Y.
System:
The UNT Digital Library
Development of An On-Line, Core Power Distribution Monitoring System
The objective of the proposed work was to develop a software package that can construct in three-dimensional core power distributions using the signals from constant temperature power sensors distributed in the reactor core. The software developed uses a mode-based state/parameter estmation technique that is particularly attractive when there are model uncertainties and/or large signal noise. The software yields the expected value of local power at the detector locations and points in between, as well as the probability distribution of the local power density
Date:
October 2, 2007
Creator:
ALdemir, Tunc; Miller, Don & Wang, Peng
System:
The UNT Digital Library
SATURATED ZONE FLOW AND TRANSPORT MODEL ABSTRACTION
The purpose of the saturated zone (SZ) flow and transport model abstraction task is to provide radionuclide-transport simulation results for use in the total system performance assessment (TSPA) for license application (LA) calculations. This task includes assessment of uncertainty in parameters that pertain to both groundwater flow and radionuclide transport in the models used for this purpose. This model report documents the following: (1) The SZ transport abstraction model, which consists of a set of radionuclide breakthrough curves at the accessible environment for use in the TSPA-LA simulations of radionuclide releases into the biosphere. These radionuclide breakthrough curves contain information on radionuclide-transport times through the SZ. (2) The SZ one-dimensional (I-D) transport model, which is incorporated in the TSPA-LA model to simulate the transport, decay, and ingrowth of radionuclide decay chains in the SZ. (3) The analysis of uncertainty in groundwater-flow and radionuclide-transport input parameters for the SZ transport abstraction model and the SZ 1-D transport model. (4) The analysis of the background concentration of alpha-emitting species in the groundwater of the SZ.
Date:
October 27, 2004
Creator:
ARNOLD, B.W.
System:
The UNT Digital Library
Definition of Intrusion Scenarios and Example Concentration Ranges for the Disposal of Near-Surface Waste at the Hanford Site
The US Department of Energy (DOE) is in the process of conducting performance assessments of its radioactive waste sites and disposal systems to ensure that public health and safety are protected, the environment is preserved, and that no remedial actions after disposal are required. Hanford Site low-level waste performance assessments are technical evaluations of waste sites or disposal systems that provide a basis for making decisions using established criteria. The purpose of this document is to provide a family of scenarios to be considered when calculating radionuclide exposure to individuals who may inadvertently intrude into near-surface waste disposal sites. Specific performance assessments will use modifications of the general scenarios described here to include additional site/system details concerning the engineering design, waste form, inventory, and environmental setting. This document also describes and example application of the Hanford-specific scenarios in the development of example concentration ranges for the disposal of near-surface wastes. The overall goal of the example calculations is to illustrate the application of the scenarios in a performance assessment to assure that people in the future cannot receive a dose greater than an established limit. 24 refs., 2 figs., 5 tabs.
Date:
October 1990
Creator:
Aaberg, R. L. & Kennedy, W. E., Jr.
System:
The UNT Digital Library
Construction and Testing of a Low-power Cryostat for MARS
A low-power cryostat was designed and built for the Multi-sensor Airborne Radiation Survey (MARS) project for the purpose of housing a close-packed high-purity germanium (HPGe) detector array of 14 HPGe detectors. The power consumption of the cold mass in the cryostat was measured to be 4.07(11) watts, sufficient for 5.5 days of continuous operation using only 8 liters of liquid nitrogen. Temperatures throughout the cryostat were measured by platinum resistance temperature detectors. These measurements were used to determine the emissivity of the copper used in the floating radiation shield and outer cryostat wall, which was constructed using chemically cleaned and passivated copper metal. Using a PNNL-developed passivation process, an emissivity of 2.5(3)% was achieved for copper.
Date:
October 1, 2007
Creator:
Aalseth, Craig E.; Caggiano, Joseph A.; Day, Anthony R.; Fast, James E. & Fuller, Erin S.
System:
The UNT Digital Library
Application of imitation steam'' systems to hot water district heating and cooling systems
Pequod Associates, Inc. and District Energy St. Paul, Inc. installed a pilot project of an innovative District Heating technology through a contract with the US DOE. This applied research was funded by the Energy Research and Development Act (94--163) for District Heating and Cooling Research. The experimental design is an intervention technique that permits hot water district heating systems to connect to buildings equipped with steam heating systems to connect to buildings equipped with steam heating systems. This method can substantially reduce conversion costs in many older buildings. The method circulates Imitation Steam, which is moist hot air, as a heating medium in standard steam radiators and steam heating coils. Based on the operation of the system during the 1989--90 and 1990--91 winter heating seasons, we conclude the following: the basic concept of using Imitation Steam was proved feasible. The performance of the system can be improved beyond the levels achieved in this installation. Imitation Steam did not cause significant corrosion in the piping system. The technology can be used by other district heating systems to lower conversion costs and increase market penetration. Among the additional benefits from this technology are: eliminating old, inefficient boilers; lower maintenance costs; improved fuel …
Date:
October 1, 1991
Creator:
Aalto, P.J. & Chen, D.B.
System:
The UNT Digital Library
Basic research needed for the development of geothermal energy
Basic research needed to facilitate development of geothermal energy is identified. An attempt has been made to make the report representative of the ideas of productive workers in the field. The present state of knowledge of geothermal energy is presented and then specific recommendations for further research, with status and priorities, are listed. Discussion is limited to a small number of applicable concepts, namely: origin of geothermal flux; transport of geothermal energy; geothermal reservoirs; rock-water interactions, and geophysical and geochemical exploration.
Date:
October 1, 1980
Creator:
Aamodt, R. L. & Riecker, R. E.
System:
The UNT Digital Library
Drawdown behavior of gravity drainage wells
An analytical solution for drawdown in gravity drainage wells is developed. The free-surface flow is viewed as incompressible, and anisotropy effects are included. The well is a line source well, and the reservoir is infinitely large. The model is valid for small drawdowns. The uniform wellbore potential inner boundary condition is modelled using the proper Green`s function. The discontinuity at the wellbore is solved by introducing a finite skin radius, and the formulation produces a seepage face. The calculated wellbore flux distribution and wellbore pressures are in fair agreement with results obtained using a numerical gravity drainage simulator. Three distinct flow periods are observed. The wellbore storage period is caused by the moving liquid level, and the duration is short. During the long intermediate flow period, the wellbore pressure is nearly constant. In this period the free surface moves downwards, and the liquid is produced mainly by vertical drainage. At long times the semilog straight line appears. The confined liquid solutions by Theis (1935) and van Everdingen and Hurst (1949) may be used during the pseudoradial flow period if the flowrate is low. New type curves are presented that yield both vertical and horizontal permeabilities.
Date:
October 1, 1993
Creator:
Aasen, J. A. & Ramey, H. J. Jr.
System:
The UNT Digital Library
Carbon dioxide problem: DOE program and a general assessment
From the view of a potential national or international policy on CO/sub 2/, progress towards these goals is reported along with suggestions for additions to and implementation of the present work. After the introduction, conclusions and recommendations are presented. The third and fourth sections contain discussions of the present research programs on the carbon cycle and on climate modeling. The fifth section considers physical effects of CO/sub 2/-induced climate change that may be of social or economic importance. The last section considers some early warning signals for climate changes due to increased atmospheric CO/sub 2/.
Date:
October 1, 1980
Creator:
Abarbanel, H.; Chamberlain, J.; Foley, H.; MacDonald, G.; Nierenberg, W. & Ruderman, M.
System:
The UNT Digital Library
Power as a function of reliability
Many studies employ multiple measurement instruments such as human raters, observers, judges, or mechanical gauges to record subject data. It is well known that the consistency of these instruments, commonly called rater reliability, limits the extent to which conclusions should be drawn from the observed data. However, the degree to which rater reliability limits conclusions has traditionally been assessed in only subjective manners. In this paper, a method is developed for objectively quantifying the impact of rate reliability on the statistical analysis of data from a commonly used collection scheme. This method allows the inclusion of a reliability index in statistical power calculations and is an invaluable tool in the planning of experiments.
Date:
October 1, 1995
Creator:
Abate, M.L.; McCabe, G.P. & Lynch, M.P.
System:
The UNT Digital Library
Radiative higgs boson decays H {yields} f{anti f}{gamma}
Higgs boson radiative decays of the form H {r_arrow} f{ovr f}{gamma} are calculated in the Standard Model using the complete one-loop expressions for the decay amplitudes. Contributions to the radiative width from leptons and light quarks are given. We also present e{ovr e} invariant mass distributions for H {r_arrow} e{ovr e}{gamma}, which illustrate the importance of the photon pole contribution and the effects of the box diagrams. 4 refs., 6 figs.
Date:
October 10, 1996
Creator:
Abbasabadi, A.; Bowser-Chao, D.; Repko, W.W. & Dicus, D.A.
System:
The UNT Digital Library
Stabilization and/or regeneration of spent sorbents from coal gasification. [Quarterly] technical report, March 1, 1992--May 31, 1992
The objective of this investigation is to determine the effects of SO{sub 2} partial pressure and reaction temperature on the conversion of sulfide containing solid wastes from coal gasifiers to stable and environmentally acceptable calcium sulfate, while preventing the release of sulfur dioxide through undesirable side reactions during the stabilization step. An additional objective of this program is to investigate the use of the Spent Sorbent Regeneration Process (SSRP) to regenerate spent limestone, from a fluidized-bed gasifier with in-bed sulfur capture, for recycling to the gasifier. To achieve these objectives, selected samples of partially sulfided sorbents will be reacted with oxygen at a variety of operating conditions under sufficient S0{sub 2} partial pressure to prevent release of sulfur from the solids during stabilization that reduces the overall sorbent utilization. Partially sulfided limestone will also be regenerated with water using the SSRP to produce calcium hydroxide and release sulfur as H{sub 2}S. The regenerated sorbent will be dewatered, dried and pelletized. The reactivity of the regenerated sorbent toward H{sub 2}S will also be determined.
Date:
October 1, 1992
Creator:
Abbasian, J.; Hill, A. H. & Wangerow, J. R.
System:
The UNT Digital Library
Development of novel copper-based sorbents for hot-gas cleanup. Technical report, March 1, 1992--May 31, 1992
The objective of this investigation is to evaluate several novel copper-based binary oxides for their suitability as regenerable sorbents for hot gas cleanup application in the temperature range of 650{degrees} to 850{degrees}C. During this quarter cyclic sulfidation/regeneration tests of the sorbents Cu{sub 2}Cr-O and Cu-Ce-0 were conducted using different compositions of the feed gases to investigate the effects of H{sub 2}0, H{sub 2} and CO. These tests were conducted in a packed-bed microreactor at 850{degrees}C. The results of these tests showed that H{sub 2} and CO (along with C02) had a significant effect on the H{sub 2}S pre-breakthrough levels, whereas H{sub 2}0 did not have an effect. The physical properties of the fresh and reacted samples of the Cu-2Cr-O and Cu-Ce-0 sorbents prepared in this program and used in the cyclic sulfidation/regeneration tests were also measured. In addition, sulfidation/regeneration tests were conducted using two commercial copper chromite sorbents (G-13 and G-89, United Catalyst, Inc.) and a zinc titanate sorbent (L-3014) in a one-inch fluidized-bed reactor at 650{degrees}C. The G-13 sorbent appears to have a much higher sulfur capacity than the G-89 sorbent.
Date:
October 1, 1992
Creator:
Abbasian, J.; Hill, A. H.; Wangerow, J. R.; Flytzani-Stephanopoulos, M.; Bo, L. & Patel, C.
System:
The UNT Digital Library