National Library of Energy BETA

Sample records for independent column approximation

  1. The Monte Carlo Independent Column Approximation Model Intercomparison

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  2. Prior-independent Approximation In the last two chapters we discussed mechanism that performed well

    E-Print Network [OSTI]

    Fiat, Amos

    5 Prior-independent Approximation In the last two chapters we discussed mechanism that performed is natural when deriving mechanisms for games of in- complete information as the Bayes-Nash equilibrium mechanism with it. The goal of prior-independent mechanism design is to identify a single mech- anism

  3. Tests of Monte Carlo Independent Column Approximation With a Mixed-Layer Ocean Model

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  4. Tests of Monte Carlo Independent Column Approximation in the ECHAM5

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  5. Distillation Column Flooding Predictor

    SciTech Connect (OSTI)

    George E. Dzyacky

    2010-11-23

    The Flooding Predictor™ is a patented advanced control technology proven in research at the Separations Research Program, University of Texas at Austin, to increase distillation column throughput by over 6%, while also increasing energy efficiency by 10%. The research was conducted under a U. S. Department of Energy Cooperative Agreement awarded to George Dzyacky of 2ndpoint, LLC. The Flooding Predictor™ works by detecting the incipient flood point and controlling the column closer to its actual hydraulic limit than historical practices have allowed. Further, the technology uses existing column instrumentation, meaning no additional refining infrastructure is required. Refiners often push distillation columns to maximize throughput, improve separation, or simply to achieve day-to-day optimization. Attempting to achieve such operating objectives is a tricky undertaking that can result in flooding. Operators and advanced control strategies alike rely on the conventional use of delta-pressure instrumentation to approximate the column’s approach to flood. But column delta-pressure is more an inference of the column’s approach to flood than it is an actual measurement of it. As a consequence, delta pressure limits are established conservatively in order to operate in a regime where the column is never expected to flood. As a result, there is much “left on the table” when operating in such a regime, i.e. the capacity difference between controlling the column to an upper delta-pressure limit and controlling it to the actual hydraulic limit. The Flooding Predictor™, an innovative pattern recognition technology, controls columns at their actual hydraulic limit, which research shows leads to a throughput increase of over 6%. Controlling closer to the hydraulic limit also permits operation in a sweet spot of increased energy-efficiency. In this region of increased column loading, the Flooding Predictor is able to exploit the benefits of higher liquid/vapor traffic that produce increased contact area and lead to substantial increases in separation efficiency – which translates to a 10% increase in energy efficiency on a BTU/bbl basis. The Flooding Predictor™ operates on the principle that between five to sixty minutes in advance of a flooding event, certain column variables experience an oscillation, a pre-flood pattern. The pattern recognition system of the Flooding Predictor™ utilizes the mathematical first derivative of certain column variables to identify the column’s pre-flood pattern(s). This pattern is a very brief, highly repeatable, simultaneous movement among the derivative values of certain column variables. While all column variables experience negligible random noise generated from the natural frequency of the process, subtle pre-flood patterns are revealed among sub-sets of the derivative values of column variables as the column approaches its hydraulic limit. The sub-set of column variables that comprise the pre-flood pattern is identified empirically through in a two-step process. First, 2ndpoint’s proprietary off-line analysis tool is used to mine historical data for pre-flood patterns. Second, the column is flood-tested to fine-tune the pattern recognition for commissioning. Then the Flooding Predictor™ is implemented as closed-loop advanced control strategy on the plant’s distributed control system (DCS), thus automating control of the column at its hydraulic limit.

  6. Glass-silicon column

    DOE Patents [OSTI]

    Yu, Conrad M.

    2003-12-30

    A glass-silicon column that can operate in temperature variations between room temperature and about 450.degree. C. The glass-silicon column includes large area glass, such as a thin Corning 7740 boron-silicate glass bonded to a silicon wafer, with an electrode embedded in or mounted on glass of the column, and with a self alignment silicon post/glass hole structure. The glass/silicon components are bonded, for example be anodic bonding. In one embodiment, the column includes two outer layers of silicon each bonded to an inner layer of glass, with an electrode imbedded between the layers of glass, and with at least one self alignment hole and post arrangement. The electrode functions as a column heater, and one glass/silicon component is provided with a number of flow channels adjacent the bonded surfaces.

  7. Nuclear reactor control column

    DOE Patents [OSTI]

    Bachovchin, Dennis M. (Plum Borough, PA)

    1982-01-01

    The nuclear reactor control column comprises a column disposed within the nuclear reactor core having a variable cross-section hollow channel and containing balls whose vertical location is determined by the flow of the reactor coolant through the column. The control column is divided into three basic sections wherein each of the sections has a different cross-sectional area. The uppermost section of the control column has the greatest cross-sectional area, the intermediate section of the control column has the smallest cross-sectional area, and the lowermost section of the control column has the intermediate cross-sectional area. In this manner, the area of the uppermost section can be established such that when the reactor coolant is flowing under normal conditions therethrough, the absorber balls will be lifted and suspended in a fluidized bed manner in the upper section. However, when the reactor coolant flow falls below a predetermined value, the absorber balls will fall through the intermediate section and into the lowermost section, thereby reducing the reactivity of the reactor core and shutting down the reactor.

  8. Small-Column Cesium Ion Exchange Elution Testing of Spherical Resorcinol-Formaldehyde

    SciTech Connect (OSTI)

    Brown, Garrett N.; Russell, Renee L.; Peterson, Reid A.

    2011-10-21

    This report summarizes the work performed to evaluate multiple, cesium loading, and elution cycles for small columns containing SRF resin using a simple, high-level waste (HLW) simulant. Cesium ion exchange loading and elution curves were generated for a nominal 5 M Na, 2.4E-05 M Cs, 0.115 M Al loading solution traced with 134Cs followed by elution with variable HNO3 (0.02, 0.07, 0.15, 0.23, and 0.28 M) containing variable CsNO3 (5.0E-09, 5.0E-08, and 5.0E-07 M) and traced with 137Cs. The ion exchange system consisted of a pump, tubing, process solutions, and a single, small ({approx}15.7 mL) bed of SRF resin with a water-jacketed column for temperature-control. The columns were loaded with approximately 250 bed volumes (BVs) of feed solution at 45 C and at 1.5 to 12 BV per hour (0.15 to 1.2 cm/min). The columns were then eluted with 29+ BVs of HNO3 processed at 25 C and at 1.4 BV/h. The two independent tracers allowed analysis of the on-column cesium interaction between the loading and elution solutions. The objective of these tests was to improve the correlation between the spent resin cesium content and cesium leached out of the resin in subsequent loading cycles (cesium leakage) to help establish acid strength and purity requirements.

  9. Approximate Graph Products Marc Hellmutha

    E-Print Network [OSTI]

    Stadler, Peter F.

    Approximate Graph Products Marc Hellmutha , Wilfried Imrichb , Werner Kl¨ocklb , Peter F. Stadlera or fingers) can vary independently of other traits, or Email addresses: marc@bioinf.uni-leipzig.de (Marc

  10. Continuous Bed Ion Exchange Column

    E-Print Network [OSTI]

    Lebendiker, Mario

    UNOTM Q&S Continuous Bed Ion Exchange Column Instruction Manual Catalog Numbers 720-0001, 720 with 5 column volumes of water. Elevated backpressures may occur when wash- ing with deionized water. Do

  11. APPROXIMATION NONSYMMETRIC

    E-Print Network [OSTI]

    Chuan, Toh Kim

    for the Degree of Doctor of Philosophy by Kim Chuan Toh August 1996 c fl Kim Chuan Toh 1996 ALL RIGHTS RESERVED #12; MATRIX APPROXIMATION PROBLEMS AND NONSYMMETRIC ITERATIVE METHODS Kim Chuan Toh, Ph.D. Cornell

  12. Microfabricated packed gas chromatographic column

    DOE Patents [OSTI]

    Kottenstette, Richard; Matzke, Carolyn M.; Frye-Mason, Gregory C.

    2003-12-16

    A new class of miniaturized gas chromatographic columns has been invented. These chromatographic columns are formed using conventional micromachining techniques, and allow packed columns having lengths on the order of a meter to be fabricated with a footprint on the order of a square centimeter.

  13. SES Microbial Methods Winogradsky Column

    E-Print Network [OSTI]

    Vallino, Joseph J.

    column with collected water and place in light (except for dark treatment). Over the next five weeks K2HPO4 4. Same as 2., but place in the dark. 5. Same as 2., but place in the dark. 6. 15 g chitin, 5 Although we will be covering this experiment in week 6, you might want to look at the following web site

  14. Multivariate approximation Robert Schaback

    E-Print Network [OSTI]

    Schaback, Robert

    Multivariate approximation Robert Schaback July 30, 2013 1 Synonyms Approximation by functions Approximations of functions are multivariate, if they replace functions of n 2 variables defined on a domain. 4 Overview Multivariate approximation is an extension of Approximation Theory and Approximation

  15. Method for packed column separations and purifications

    DOE Patents [OSTI]

    Holman, David A. (Richland, WA); Bruckner-Lea, Cynthia J. (Richland, WA); Brockman, Fred J. (Kennewick, WA); Chandler, Darrell P. (Richland, WA)

    2006-08-15

    The invention encompasses a method of packing and unpacking a column chamber. A mixture of a fluid and a matrix material are introduced through a column chamber inlet so that the matrix material is packed within a column chamber to form a packed column. The column chamber having the column chamber inlet or first port for receiving the mixture further has an outlet port and an actuator port. The outlet port is partially closed for capturing the matrix material and permitting the fluid to flow therepast by rotating relative one to the other of a rod placed in the actuator port. Further rotation relative one to the other of the rod and the column chamber opens the outlet and permits the matrix material and the fluid to flow therethrough thereby unpacking the matrix material from the column chamber.

  16. Pharmacia Spin Column Protocol Leslie Vosshall

    E-Print Network [OSTI]

    Reactions or Riboprobes 1. Invert column and gently vortex to resuspend the resin. 2. Snap off bottom of column at perforation. 3. Loosen lid ½ turn and place column into a clean microcentrifuge tube. 4. Spin microcentrifuge tube. 7. Load sample. Be sure to dispense into the resin bed, not around the sides of the tube. 8

  17. Vivapure Metal Chelate Maxi spin columns

    E-Print Network [OSTI]

    Lebendiker, Mario

    ® Vivapure Metal Chelate Maxi spin columns Hisn Technical data and operating instructions. For in vitro use only. #12;2 Handling overview Vivapure Metal Chelate Maxi spin columns - for the purification of proteins with poly-histidine tags Storage conditions Vivapure Metal Chelate Maxi spin columns can be stored

  18. Vivapure Metal Chelate Mini spin columns

    E-Print Network [OSTI]

    Lebendiker, Mario

    ® Vivapure Metal Chelate Mini spin columns Hisn Technical data and operating instructions. For in vitro use only. #12;2 Handling overview Vivapure Metal Chelate Mini spin columns - for the purification of proteins with poly-histidine tags Storage conditions Vivapure Metal Chelate Mini spin columns can be stored

  19. Vivapure Metal Chelate Mega spin columns

    E-Print Network [OSTI]

    Lebendiker, Mario

    ®® Vivapure Metal Chelate Mega spin columns Hisn Technical data and operating instructions. For in vitro use only. #12;2 Handling overview Vivapure Metal Chelate Mega spin columns - for the purification of proteins with poly-histidine tags Storage conditions Vivapure Metal Chelate Mega spin columns can be stored

  20. Vivapure Metal Chelate Mini spin columns

    E-Print Network [OSTI]

    Lebendiker, Mario

    ® Vivapure Metal Chelate Mini spin columns Hisn #12;E. coli cell lysates containing a recombinant Hisn-tagged protein were purified using Vivapure Metal Chelate Mini spin columns and competitor products. The Vivapure Metal Chelate Mini spin columns were pre- loaded with different metal ions

  1. Fast Approximate Convex Decomposition 

    E-Print Network [OSTI]

    Ghosh, Mukulika

    2012-10-19

    Approximate convex decomposition (ACD) is a technique that partitions an input object into "approximately convex" components. Decomposition into approximately convex pieces is both more efficient to compute than exact ...

  2. Approximate Information Theory

    E-Print Network [OSTI]

    Penny, Will

    Approximate Inference Will Penny Information Theory Information Entropy Kullback-Liebler Divergence Approximate Inference Will Penny 31st March 2011 #12;Approximate Inference Will Penny Information Theory Will Penny Information Theory Information Entropy Kullback-Liebler Divergence Gaussians Asymmetry

  3. ARM - Measurement - Ozone Column Abundance

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  4. Two-Column Aerosol Project

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  5. Recent research and development of ground column technologies

    E-Print Network [OSTI]

    Han, Jie

    2015-11-01

    In recent years, ground columns, such as vibro-concrete columns and geosynthetic-reinforced stone columns, have been increasingly used to support superstructures and embankments when they are constructed on soft foundations. Several new column...

  6. Independent Peer Reviews

    SciTech Connect (OSTI)

    2012-03-16

    Independent Assessments: DOE's Systems Integrator convenes independent technical reviews to gauge progress toward meeting specific technical targets and to provide technical information necessary for key decisions.

  7. Development and design of a multi-column experimental setup for Kr/Xe separation

    SciTech Connect (OSTI)

    Garn, Troy G.; Greenhalgh, Mitchell; Watson, Tony

    2014-12-01

    As a precursor to FY-15 Kr/Xe separation testing, design modifications to an existing experimental setup are warranted. The modifications would allow for multi-column testing to facilitate a Xe separation followed by a Kr separation using engineered form sorbents prepared using an INL patented process. A new cooling apparatus capable of achieving test temperatures to -40° C and able to house a newly designed Xe column was acquired. Modifications to the existing setup are being installed to allow for multi-column testing and gas constituent analyses using evacuated sample bombs. The new modifications will allow for independent temperature control for each column enabling a plethora of test conditions to be implemented. Sample analyses will be used to evaluate the Xe/Kr selectivity of the AgZ-PAN sorbent and determine the Kr purity of the effluent stream following Kr capture using the HZ-PAN sorbent.

  8. Heat Exchanger Technologies for Distillation Columns 

    E-Print Network [OSTI]

    Polley, G. T.

    2002-01-01

    '" Surface " i i i i I Vapour Flow I IDowncomcr , ICoolanlFCtXl I ('oolAnl Rcll1nJ I Figure 3. Integral Intermediate Condenser The mass flow of liquid coming down the column will generally be similar to that of the vapour flowing up the column...

  9. Circulation in gas-slurry column reactors

    SciTech Connect (OSTI)

    Clark, N.; Kuhlman, J.; Celik, I.; Gross, R.; Nebiolo, E.; Wang, Yi-Zun.

    1990-08-15

    Circulation in bubble columns, such as those used in fischer-tropsch synthesis, detracts from their performance in that gas is carried on average more rapidly through the column, and the residence time distribution of the gas in the column is widened. Both of these factors influence mass-transfer operations in bubble columns. Circulation prediction and measurement has been undertaken using probes, one-dimensional models, laser Doppler velocimetry, and numerical modeling. Local void fraction was measured using resistance probes and a newly developed approach to determining air/water threshold voltage for the probe. A tall column of eight inch diameter was constructed of Plexiglas and the distributor plate was manufactured to distribute air evenly through the base of the column. Data were gathered throughout the volume at three different gas throughputs. Bubble velocities proved difficult to measure using twin probes with cross-correlation because of radial bubble movement. A series of three-dimensional mean and RMS bubble and liquid velocity measurements were also obtained for a turbulent flow in a laboratory model of a bubble column. These measurements have been made using a three-component laser Doppler velocimeter (LDV), to determine velocity distributions non-intrusively. Finally, the gas-liquid flow inside a vertically situated circular isothermal column reactor was simulated numerically. 74 refs., 170 figs., 5 tabs.

  10. Updated: June 23, 2010 Diophantine approximation,

    E-Print Network [OSTI]

    Waldschmidt, Michel

    Updated: June 23, 2010 Diophantine approximation, irrationality and transcendence Michel://www.math.jussieu.fr/ miw/articles/ps/eccm.ps [5] -- , Elliptic functions and transcendence, in Surveys in number theory of and . Schneider's Theorem on the transcendence of j() (corollary 174). 11 Algebraic independence 11.1 Chudnovskii

  11. Targeted Technology Transfer to US Independents

    SciTech Connect (OSTI)

    E. Lance Cole

    2009-09-30

    The Petroleum Technology Transfer Council (PTTC) was established by domestic crude oil and natural gas producers, working in conjunction with the Independent Petroleum Association of America (IPAA), the U.S. Department of Energy (DOE) and selected universities, in 1994 as a national not-for-profit organization. Its goal is to transfer Exploration and Production (E&P) technology to the domestic upstream petroleum industry, in particular to the small independent operators. PTTC connects producers, technology providers and innovators, academia, and university/industry/government research and development (R&D) groups. From inception PTTC has received federal funding through DOE's oil and natural gas program managed by the National Energy Technology Laboratory (NETL). With higher funding available in its early years, PTTC was able to deliver well more than 100 workshops per year, drawing 6,000 or more attendees per year. Facing the reality of little or no federal funding in the 2006-2007 time frame, PTTC and the American Association of Petroleum Geologists (AAPG) worked together for PTTC to become a subsidiary organization of AAPG. This change brings additional organizational and financial resources to bear for PTTC's benefit. PTTC has now been 'powered by AAPG' for two full fiscal years. There is a clear sense that PTTC has stabilized and is strengthening its regional workshop and national technology transfer programs and is becoming more entrepreneurial in exploring technology transfer opportunities beyond its primary DOE contract. Quantitative accomplishments: PTTC has maintained its unique structure of a national organization working through Regional Lead Organizations (RLOs) to deliver local, affordable workshops. During the contract period PTTC consolidated from 10 to six regions efficiency and alignment with AAPG sections. The number of workshops delivered by its RLOs during the contract period is shown below. Combined attendance over the period was approximately 32,000, 70% of whom were repeat attendees. Participant feedback established that 40% of them said they had applied a technology they learned of through PTTC. Central/Eastern Gulf Univ. of Alabama, LSU Center for Energy Studies 77 Eastern West Virginia University, Illinois Geological Survey, W. Michigan Univ. 99 Midcontinent University of Kansas, University of Tulsa, Okla. Geological Survey (past) 123 Rocky Mountains Colorado School of Mines 147 Texas/SE New Mexico Bureau of Economic Geology, U. of Texas at Austin 85 West Coast Conservation Committee of California O&G Producers, Univ. So. Cal. (past) 54 At the national level HQ went from an office in Houston to a virtual office in the Tulsa, Okla. area with AAPG providing any physical assets required. There are no employees, rather several full time and several part time contractors. Since inception, PTTC has produced quarterly and mailed the 16-page Network News newsletter. It highlights new advances in technology and has a circulation of 19,000. It also produces the Tech Connections Column in The American Oil & Gas Reporter, with a circulation of 13,000. On an approximate three-week frequency, the electronic Email Tech Alert goes out to 9,000 readers. The national staff also maintains a central website with information of national interest and individual sections for each of the six regions. The national organization also provides legal and accounting services, coordinates the RLO activities, exhibits at at least major national and other meetings, supports the volunteer Board as it provides strategic direction, and is working to restore the Producer Advisory Groups to bolster the regional presence. Qualitative Value: Three qualitative factors confirm PTTC's value to the domestic O&G producing industry. First, AAPG was willing to step in and rescue PTTC, believing it was of significant interest to its domestic membership and of potential value internationally. Second, through a period of turmoil and now with participant fees dramatically increased, industry participants 'keep coming back' to wo

  12. Mechanical interactions of UIS support columns. [LMFBR

    SciTech Connect (OSTI)

    Kennedy, J.M.; Belytschko, T.B.

    1983-01-01

    Code development involving above-core structures (ACS) has recently focused on modeling the complexities of mechanical interactions in the ACS support columns which play a very important role in their behavior. These developments are directed toward two considerations: (1) the prediction of the forces exerted by the column in a hypothetical core-disruptive accident (HCDA) in order that the motion of the ACS can be predicted in a coupled fluid-structure analysis, (2) the calculation of the strains and deformations of the support columns so that situations which lead to complete failure can be identified. Finite element capabilities have been developed to handle various types of plant design for the analysis of coupled hydrodynamics and structural response. Beam elements, which previously represented the support columns were able to account for geometric nonlinearities and material nonlinearities, however, changes in the column cross section were not treated. Therefore, one of the aims of this study was to examine the effect of the change in cross section on the behavior of the support columns. A second effect which has been studied is the behavior of support columns consisting of two concentric cylinders.

  13. Performance of Reinforced Concrete Column Lap Splices 

    E-Print Network [OSTI]

    Alberson, Ryan M.

    2010-01-14

    Cantilevered reinforced concrete columns with a lap splice of the longitudinal reinforcement near the base can induce high moment demands on the splice region when lateral loads are present on the structure. Code design specifications typically...

  14. Independent Oversight Program

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-08-30

    The order prescribes the requirements and responsibilities for the DOE Independent Oversight Program. Cancels DOE O 470.2B. Superseded by DOE O 227.1A.

  15. 1000 Independence Avenue, SW

    Energy Savers [EERE]

    office of small & disadvantaged business utilization 1000 Independence Avenue, SW Washington, DC 20585 202.586.7377 www.smallbusiness.energy.gov the department purchases a wide...

  16. Testing of the Modified Anomalous Diffraction Approximation with T-Matrix Calculations for Hexagonal Columns

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  17. THERMAL MODELING ANALYSIS OF CST MEDIA IN THE SMALL COLUMN ION EXCHANGE PROJECT

    SciTech Connect (OSTI)

    Lee, S.

    2010-11-01

    Models have been developed to simulate the thermal characteristics of Crystalline Silicotitanate (CST) ion exchange media fully loaded with radioactive cesium in a column configuration and distributed within a waste storage tank. This work was conducted to support the Small Column Ion Exchange (SCIX) program which is focused on processing dissolved, high-sodium salt waste for the removal of specific radionuclides (including Cs-137, Sr-90, and actinides) within a High Level Waste (HLW) storage tank at the Savannah River Site. The SCIX design includes CST columns inserted and supported in the tank top risers for cesium removal. Temperature distributions and maximum temperatures across the column were calculated with a focus on process upset conditions. A two-dimensional computational modeling approach for the in-column ion-exchange domain was taken to include conservative, bounding estimates for key parameters such that the results would provide the maximum centerline temperatures achievable under the design configurations using a feed composition known to promote high cesium loading on CST. One salt processing scenario includes the transport of the loaded (and possibly ground) CST media to the treatment tank floor. Therefore, additional thermal modeling calculations were conducted using a three-dimensional approach to evaluate temperature distributions for the entire in-tank domain including distribution of the spent CST media either as a mound or a flat layer on the tank floor. These calculations included mixtures of CST with HLW sludge or loaded Monosodium Titanate (MST) media used for strontium/actinide sorption. The current full-scale design for the CST column includes one central cooling pipe and four outer cooling tubes. Most calculations assumed that the fluid within the column was stagnant (i.e. no buoyancy-induced flow) for a conservative estimate. A primary objective of these calculations was to estimate temperature distributions across packed CST beds immersed in waste supernate or filled with dry air under various accident scenarios. Accident scenarios evaluated included loss of salt solution flow through the bed (a primary heat transfer mechanism), inadvertent column drainage, and loss of active cooling in the column. The calculation results showed that for a wet CST column with active cooling through one central and four outer tubes and 35 C ambient external air, the peak temperature for the fully-loaded column is about 63 C under the loss of fluid flow accident, which is well below the supernate boiling point. The peak temperature for the naturally-cooled (no active, engineered cooling) wet column is 156 C under fully-loaded conditions, exceeding the 130 C boiling point. Under these conditions, supernate boiling would maintain the column temperature near 130 C until all supernate was vaporized. Without active engineered cooling and assuming a dry column suspended in unventilated air at 35 C, the fully-loaded column is expected to rise to a maximum of about 258 C due to the combined loss-of coolant and column drainage accidents. The modeling results demonstrate that the baseline design using one central and four outer cooling tubes provides a highly efficient cooling mechanism for reducing the maximum column temperature. Results for the in-tank modeling calculations clearly indicate that when realistic heat transfer boundary conditions are imposed on the bottom surface of the tank wall, as much as 450 gallons of ground CST (a volume equivalent to two ion exchange processing cycles) in an ideal hemispherical shape (the most conservative geometry) can be placed in the tank without exceeding the 100 C wall temperature limit. Furthermore, in the case of an evenly-distributed flat layer, the tank wall reaches the temperature limit after the ground CST material reaches a height of approximately 8 inches.

  18. PCB fluxes from the sediment to the water column following resuspension A column experiment

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    PCB fluxes from the sediment to the water column following resuspension ­ A column experiment, have been specially designed to study PCB behavior during sediment resuspension, settling resuspension and settling. The sediment should then get more reduced due to the progressive bacterial

  19. Ideology Among Independent Voter Groups 

    E-Print Network [OSTI]

    Berry, Meagan

    2007-07-14

    Not all independent voters are the same. Some independents lean toward a political party and are therefore called “independent leaners.” The objective here is to uncover what forces cause independent leaners to retain some level of partisanship...

  20. Non-planar microfabricated gas chromatography column

    DOE Patents [OSTI]

    Lewis, Patrick R. (Albuquerque, NM); Wheeler, David R. (Albuquerque, NM)

    2007-09-25

    A non-planar microfabricated gas chromatography column comprises a planar substrate having a plurality of through holes, a top lid and a bottom lid bonded to opposite surfaces of the planar substrate, and inlet and outlet ports for injection of a sample gas and elution of separated analytes. A plurality of such planar substrates can be aligned and stacked to provide a longer column length having a small footprint. Furthermore, two or more separate channels can enable multi-channel or multi-dimensional gas chromatography. The through holes preferably have a circular cross section and can be coated with a stationary phase material or packed with a porous packing material. Importantly, uniform stationary phase coatings can be obtained and band broadening can be minimized with the circular channels. A heating or cooling element can be disposed on at least one of the lids to enable temperature programming of the column.

  1. Minimization of effluent discharge to the Soil Column

    SciTech Connect (OSTI)

    Dronen, V.R.; Hydzik, K.M.

    1994-01-01

    In 1987, the US Congress mandated that the US Department of Energy (DOE), cease discharge of contaminated effluents to the soil column at the Hanford Site by calendar year 1995. The plan and schedule for this activity can be found in The Plan and Schedule to Discontinue Disposal of Contaminated Liquid into the Soil Column at the Hanford Site, (WHC 1987). Coupled with this mandate and DOE`s intent to cleanup Hanford (remediate and restore to the extent practicable), DOE entered into an agreement with the US Environmental Protection Agency (EPA) and the Washington State Department of Ecology (Ecology). The agreement is called the ``Hanford Federal Facility Agreement and Consent Order`` (Ecology et al. 1992) otherwise known as the Tri-Party Agreement. The Tri-Party Agreement established schedules and legally enforceable milestones for the Hanford cleanup mission. One such milestone was to cease discharge of effluent to Hanford`s 300 Area process trenches located approximately 100 m from the Columbia River, north of Richland, Washington.

  2. Approximations non-recursively

    E-Print Network [OSTI]

    Ábrahám, Erika

    ) * x Regard non-recursively de#12;ned approximations fact 0 = nx -> bot fact 1 = nx -> if x else fact 0 (x 1) #3; x fact 2 = nx -> if x fact of fact should satisfy the de#12;ning equation fact = nx -> if x

  3. Intelligent fuzzy supervisory control for distillation columns 

    E-Print Network [OSTI]

    Santhanam, Srinivasan

    1993-01-01

    (disturbance) and the response of the top tray temperature(controlled variable). This thesis will also outline a simulation software to characterize a benzene-toluene binary distillation column and an X-window based Graphical User Interface to run the simulation....

  4. Independent technical review, handbook

    SciTech Connect (OSTI)

    Not Available

    1994-02-01

    Purpose Provide an independent engineering review of the major projects being funded by the Department of Energy, Office of Environmental Restoration and Waste Management. The independent engineering review will address questions of whether the engineering practice is sufficiently developed to a point where a major project can be executed without significant technical problems. The independent review will focus on questions related to: (1) Adequacy of development of the technical base of understanding; (2) Status of development and availability of technology among the various alternatives; (3) Status and availability of the industrial infrastructure to support project design, equipment fabrication, facility construction, and process and program/project operation; (4) Adequacy of the design effort to provide a sound foundation to support execution of project; (5) Ability of the organization to fully integrate the system, and direct, manage, and control the execution of a complex major project.

  5. Texas Independence Hall 

    E-Print Network [OSTI]

    Raiford Stripling Associates, Inc.; Stripling, Raiford L.

    2011-08-29

    Brazos Valley Research Associates (BVRA) conducted a 100% pedestrian survey of an 85 acre tract of land, the site of the proposed Bay City Independent School District High School in north-central Matagorda County, Texas on May 23-24, 1999...

  6. Modeling of Crystalline Silicotitanate Ion Exchange Columns

    SciTech Connect (OSTI)

    Walker, D.D.

    1999-03-09

    Non-elutable ion exchange is being considered as a potential replacement for the In-Tank Precipitation process for removing cesium from Savannah River Site (SRS) radioactive waste. Crystalline silicotitanate (CST) particles are the reference ion exchange medium for the process. A major factor in the construction cost of this process is the size of the ion exchange column required to meet product specifications for decontaminated waste. To validate SRS column sizing calculations, SRS subcontracted two reknowned experts in this field to perform similar calculations: Professor R. G. Anthony, Department of Chemical Engineering, Texas A&038;M University, and Professor S. W. Wang, Department of Chemical Engineering, Purdue University. The appendices of this document contain reports from the two subcontractors. Definition of the design problem came through several meetings and conference calls between the participants and SRS personnel over the past few months. This document summarizes the problem definition and results from the two reports.

  7. Integrated Thermal and Hydraulic Analysis of Distillation Columns 

    E-Print Network [OSTI]

    Samant, K.; Sinclair, I.; Keady, G.

    2002-01-01

    and Hydraulic Analysis of Distillation Columns Ketan Samant, Aspen Technology Ian Sinclair, Aspen Technology Ginger Keady, Aspen Technology This paper outlines the implementation of column thermal and hydraulic analysis in a simulation environment...

  8. Cross flow cyclonic flotation column for coal and minerals beneficiation

    DOE Patents [OSTI]

    Lai, Ralph W. (Upper St. Clair, PA); Patton, Robert A. (Pittsburgh, PA)

    2000-01-01

    An apparatus and process for the separation of coal from pyritic impurities using a modified froth flotation system. The froth flotation column incorporates a helical track about the inner wall of the column in a region intermediate between the top and base of the column. A standard impeller located about the central axis of the column is used to generate a centrifugal force thereby increasing the separation efficiency of coal from the pyritic particles and hydrophillic tailings.

  9. U. L'Aquila INVERTING GOME FORMALDEHYDE COLUMN

    E-Print Network [OSTI]

    Curci, Gabriele

    U. L'Aquila CETEMPS INVERTING GOME FORMALDEHYDE COLUMN FOR BIOGENIC EMISSIONS OVER EUROPE Gabriele formaldehyde (HCHO) column data retrieved from GOME over the European continent. Formaldehyde is an important with model simulations focusing on the European continent. Our results suggest that the formaldehyde column

  10. Biodegradation of jet fuel in vented columns of water-unsaturated sandy soil. Master's thesis

    SciTech Connect (OSTI)

    Coho, J.W.

    1990-01-01

    The effect of soil water content on the rate of jet fuel (JP-4) biodegradation in air-vented, water-unsaturated columns of sandy soil was investigated. The contaminated soil was obtained from a spill site located on Tyndall AFB, Fla. The initial soil loading was 4590 mg of JP-4/kg of dry soil. Three laboratory columns were packed with the contaminated soil, saturated and drained for periods of 81-89 days. Two columns were continuously vented with air, and the third, intended to provide an anaerobic control, was vented with nitrogen. The venting gas flows were maintained between 1 and 2.5 soil pore volume changeouts per day. The total JP-4 removal in the air-vented columns averaged 44% of the mass originally present. Biodegradation and volatilization accounted for 93% and 7% of the total removal, respectively. A maximum biodegradation rate of 14.3 mg of JP-4/kg of moist soil per day was observed at a soil water content of approximately 72% saturation. Soil drainage characteristics indicated that this water content may have corresponded to 100% of the in situ field capacity water content. Theses.

  11. Beyond Zel'dovich-Type Approximations in Gravitational Instability Theory --- Padé Prescription in Spheroidal Collapse ---

    E-Print Network [OSTI]

    Takahiko Matsubara; Ayako Yoshisato; Masahiro Morikawa

    1997-08-17

    Among several analytic approximations for the growth of density fluctuations in the expanding Universe, Zel'dovich approximation in Lagrangian coordinate scheme is known to be unusually accurate even in mildly non-linear regime. This approximation is very similar to the Pad\\'e approximation in appearance. We first establish, however, that these two are actually different and independent approximations with each other by using a model of spheroidal mass collapse. Then we propose Pad\\'e-prescribed Zel'dovich-type approximations and demonstrate, within this model, that they are much accurate than any other known nonlinear approximations.

  12. Improved approximate formulas for flux from cylindrical and rectangular sources

    SciTech Connect (OSTI)

    Wallace, O.J.; Bokharee, S.A.

    1993-03-01

    This report provides two new approximate formulas for the flux at detector points outside the radial and axial extensions of a homogeneous cylindrical source and improved approximate formulas for the flux at points opposite rectangular surface sources. These formulas extend the range of geometries for which analytic approximations may be used by shield design engineers to make rapid scoping studies and check more extensive calculations for reasonableness. These formulas can be used to support skeptical, independent evaluations and are also valuable teaching tools for introducing shield designers to complex shield analyses.

  13. The Mechanisms of Board Independence

    E-Print Network [OSTI]

    Gordon, Jeff

    2004-01-01

    the case of a management buyout, the independent directorsLines under the employee buyout. 3. Current SEC proposal [

  14. Micro-column plasma emission liquid chromatograph

    DOE Patents [OSTI]

    Gay, Don D. (Aiken, SC)

    1984-01-01

    In a direct current plasma emission spectrometer for use in combination with a micro-column liquid chromatograph, an improved plasma source unit. The plasma source unit includes a quartz capillary tube having an inlet means, outlet off gas means and a pair of spaced electrodes defining a plasma region in the tube. The inlet means is connected to and adapted to receive eluant of the liquid chromatograph along with a stream of plasma-forming gas. There is an opening through the wall of the capillary tube penetrating into the plasma region. A soft glass capillary light pipe is disposed at the opening, is connected to the spectrometer, and is adapted to transmit light passing from the plasma region to the spectrometer. There is also a source of electromotive force connected to the electrodes sufficient to initiate and sustain a plasma in the plasma region of the tube.

  15. Characterizing History Independent Data Structures

    E-Print Network [OSTI]

    Hartline, Jason D.

    Characterizing History Independent Data Structures Jason D. Hartline 1 , Edwin S. Hong 1 history independent data structures as proposed for study by Teague and Naor [2]. In a history independent data struc­ ture, nothing can be learned from the representation of the data structure except for what

  16. Characterizing History Independent Data Structures

    E-Print Network [OSTI]

    Mohr, Alexander E.

    Characterizing History Independent Data Structures Jason D. Hartline1 , Edwin S. Hong1 , Alexander history independent data structures as proposed for study by Teague and Naor [2]. In a history independent data struc- ture, nothing can be learned from the representation of the data structure except for what

  17. Sandia Energy - Floating Oscillating Water Column Reference Model...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to provide publicly available technical and economic benchmarks for a variety of marine energy converters. The final reference model, an oscillating water column (OWC)...

  18. Applicability of hydroxylamine nitrate reductant in pulse-column contactors

    SciTech Connect (OSTI)

    Reif, D.J.

    1983-05-01

    Uranium and plutonium separations were made from simulated breeder reactor spent fuel dissolver solution with laboratory-sized pulse column contactors. Hydroxylamine nitrate (HAN) was used for reduction of plutonium (1V). An integrated extraction-partition system, simulating a breeder fuel reprocessing flowsheet, carried out a partial partition of uranium and plutonium in the second contactor. Tests have shown that acceptable coprocessing can be ontained using HAN as a plutonium reductant. Pulse column performance was stable even though gaseous HAN oxidation products were present in the column. Gas evolution rates up to 0.27 cfm/ft/sup 2/ of column cross section were tested and found acceptable.

  19. Approximation Algorithms for Covering Problems

    E-Print Network [OSTI]

    Koufogiannakis, Christos

    2009-01-01

    1.3.1 Sequential Algorithms . . . . . . . . . . . . .Distributed 2-approximation algorithm for CMIP 2 (Alg.2 Sequential Algorithm 2.1 The Greedy Algorithm for Monotone

  20. Approximate circuits for increased reliability

    DOE Patents [OSTI]

    Hamlet, Jason R.; Mayo, Jackson R.

    2015-12-22

    Embodiments of the invention describe a Boolean circuit having a voter circuit and a plurality of approximate circuits each based, at least in part, on a reference circuit. The approximate circuits are each to generate one or more output signals based on values of received input signals. The voter circuit is to receive the one or more output signals generated by each of the approximate circuits, and is to output one or more signals corresponding to a majority value of the received signals. At least some of the approximate circuits are to generate an output value different than the reference circuit for one or more input signal values; however, for each possible input signal value, the majority values of the one or more output signals generated by the approximate circuits and received by the voter circuit correspond to output signal result values of the reference circuit.

  1. Column-Generation Boosting Methods for Mixture of Kernels

    E-Print Network [OSTI]

    Chandy, John A.

    Column-Generation Boosting Methods for Mixture of Kernels Jinbo Bi Computer-Aided Diagnosis approach to classification and regres- sion based on column generation using a mixture of ker- nels logistic regression, etc. The idea is to map data into Permission to make digital or hard copies of all

  2. Answering Table Queries on the Web using Column Rakesh Pimplikar

    E-Print Network [OSTI]

    Sarawagi, Sunita

    , India rakesh.pimplikar@in.ibm.com Sunita Sarawagi IIT Bombay Mumbai, India sunita@iitb.ac.in ABSTRACT We, . . . , Qq, decide for each Ti if it is relevant to Q and if so, identify the mapping between the columns of Ti and query columns. We represent this task as a graphical model that jointly maps all tables

  3. Improved Analysis and Understanding of the Petlyuk Distillation Column

    E-Print Network [OSTI]

    Skogestad, Sigurd

    of the energy consumption. When the column is oper­ ated optimally, the infinite staged Petlyuk column always Extended Abstract The Petlyuk (Petlyuk 1965) arrangement for separation of a ternary mixture into three pure product streams has the potential of 20­50% energy savings compared to conventional distillation

  4. Improved Analysis and Understanding of the Petlyuk Distillation Column

    E-Print Network [OSTI]

    Skogestad, Sigurd

    of the energy consumption. When the column is oper- ated optimally, the infinite staged Petlyuk column always Extended Abstract The Petlyuk (Petlyuk 1965) arrangement for separation of a ternary mixture into three pure product streams has the potential of 20-50% energy savings compared to conventional distillation

  5. Calculation of CO2 column heights in depleted gas fields from known pre-production gas column heights

    E-Print Network [OSTI]

    Wilkinson, Mark

    Calculation of CO2 column heights in depleted gas fields from known pre-production gas column that the CO2 is in a dense phase (either liquid or supercritical). Accurate assessment of the storage capacity also requires an estimation of the amount of CO2 that can be safely stored beneath the reservoir seal

  6. APPROXIMATELY UNITARILY EQUIVALENT MORPHISMS AND ...

    E-Print Network [OSTI]

    2010-07-28

    ?(a) = diag(a(x)1,...,a(xk)), then we say that ? and ? are approximately unitarily ... Mr?1(C(X)) and a unital ?-homomorphism µ : C(X) ? Mr(C(X)) with finite.

  7. Check Estimates and Independent Costs

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-03-28

    Check estimates and independent cost estimates (ICEs) are tools that can be used to validate a cost estimate. Estimate validation entails an objective review of the estimate to ensure that estimate criteria and requirements have been met and well documented, defensible estimate has been developed. This chapter describes check estimates and their procedures and various types of independent cost estimates.

  8. MODELING AND SIMULATION OF SOLID FLUIDIZATION IN A RESIN COLUMN

    SciTech Connect (OSTI)

    Lee, S.

    2014-06-24

    The objective of the present work is to model the resin particles within the column during fluidization and sedimentation processes using computation fluid dynamics (CFD) approach. The calculated results will help interpret experimental results, and they will assist in providing guidance on specific details of testing design and establishing a basic understanding of particle’s hydraulic characteristics within the column. The model is benchmarked against the literature data and the test data (2003) conducted at Savannah River Site (SRS). The paper presents the benchmarking results and the modeling predictions of the SRS resin column using the improved literature correlations applicable for liquid-solid granular flow.

  9. SENSITIVITY ANALYSIS FOR SALTSTONE DISPOSAL UNIT COLUMN DEGRADATION ANALYSES

    SciTech Connect (OSTI)

    Flach, G.

    2014-10-28

    PORFLOW related analyses supporting a Sensitivity Analysis for Saltstone Disposal Unit (SDU) column degradation were performed. Previous analyses, Flach and Taylor 2014, used a model in which the SDU columns degraded in a piecewise manner from the top and bottom simultaneously. The current analyses employs a model in which all pieces of the column degrade at the same time. Information was extracted from the analyses which may be useful in determining the distribution of Tc-99 in the various SDUs throughout time and in determining flow balances for the SDUs.

  10. Cyclic behavior and design of steel columns subjected to large drift

    E-Print Network [OSTI]

    Newell, James David

    2008-01-01

    testing. These deep columns have larger web width-to-that provided by the web of a deep column with a similarflange and web local buckling for the deep column sections.

  11. Sequence independent amplification of DNA

    DOE Patents [OSTI]

    Bohlander, S.K.

    1998-03-24

    The present invention is a rapid sequence-independent amplification procedure (SIA). Even minute amounts of DNA from various sources can be amplified independent of any sequence requirements of the DNA or any a priori knowledge of any sequence characteristics of the DNA to be amplified. This method allows, for example, the sequence independent amplification of microdissected chromosomal material and the reliable construction of high quality fluorescent in situ hybridization (FISH) probes from YACs or from other sources. These probes can be used to localize YACs on metaphase chromosomes but also--with high efficiency--in interphase nuclei. 25 figs.

  12. A mobile computed tomographic unit for inspecting reinforced concrete columns

    SciTech Connect (OSTI)

    Sumitra, T.; Srisatit, S.; Pattarasumunt, A.

    1994-12-31

    A mobile computed tomographic unit applicable in the inspection of reinforced concrete columns was designed, constructed and tested. A CT image reconstruction programme written in Quick Basic was first developed to be used on an IBM PC/AT microcomputer. It provided user friendly menus for data processing and displaying CT image. The prototype of a gamma-ray scanning system using a 1.11 GBq Cs-137 source and a NaI(T1) scintillation detector was also designed and constructed. The system was a microcomputer controlled, single-beam rotate-translate scanner used for collecting transmitted gamma-ray data in different angles. The CT unit was finally tested with a standard column and a column of an existing building. The cross sectional images of the columns could be clearly seen. The positions and sizes of the reinforced bars could be estimated.

  13. Water column characterization of anchialine caves in Quintana Roo, Mexico 

    E-Print Network [OSTI]

    Dodson, Brett Wayne

    2000-01-01

    Water column characteristics of three coastal cave systems in Quintana Roo, Mexico on the Yucatan Peninsula were profiled from January 1996 to July 1997. A Hydrolab Data Sonde 3 Multiprobe Logger was used to acquire in ...

  14. High speed electrical power takeoff for oscillating water columns 

    E-Print Network [OSTI]

    Hodgins, Neil

    2010-01-01

    This thesis describes research into electrical power takeoff mechanisms for Oscillating Water Column (OWC) wave energy devices. The OWC application is studied and possible alternatives to the existing Induction Generator ...

  15. Practical Application of Distillation Column Energy Control Systems 

    E-Print Network [OSTI]

    Matthews, S. A.

    1980-01-01

    Closed loop computer control of an ethylene column has been shown to save $350/day in improved ethylene recovery and $150/day in reduced energy consumption. These savings are achieved through material balance optimization and energy balance...

  16. Transformations of mercury in the marine water column

    E-Print Network [OSTI]

    Munson, Kathleen M. (Kathleen May)

    2014-01-01

    Methylation of mercury (Hg) in the marine water column has been hypothesized to serve as the primary source of the bioaccumulating chemical species monomethylmercury (MMHg) to marine food webs. Despite decades of research ...

  17. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY

    SciTech Connect (OSTI)

    Bernard A. Toseland, Ph.D.

    1999-03-01

    The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large diameter reactors. The past three months of research have been focused on two major areas of bubble column hydrodynamics: (1) pressure and temperature effects on gas holdup and (2) region transition using a sparger as a gas distributor.

  18. Advances in interior point methods and column generation 

    E-Print Network [OSTI]

    González Brevis, Pablo; Brevis, Pablo

    2013-11-28

    In this thesis we study how to efficiently combine the column generation technique (CG) and interior point methods (IPMs) for solving the relaxation of a selection of integer programming problems. In order to obtain an ...

  19. METHOD TO TEST ISOTOPIC SEPARATION EFFICIENCY OF PALLADIUM PACKED COLUMNS

    SciTech Connect (OSTI)

    Heung, L; Gregory Staack, G; James Klein, J; William Jacobs, W

    2007-06-27

    The isotopic effect of palladium has been applied in different ways to separate hydrogen isotopes for many years. At Savannah River Site palladium deposited on kieselguhr (Pd/k) is used in a thermal cycling absorption process (TCAP) to purify tritium for over ten years. The need to design columns for different throughputs and the desire to advance the performance of TCAP created the need to evaluate different column designs and packing materials for their separation efficiency. In this work, columns with variations in length, diameter and metal foam use, were tested using an isotope displacement method. A simple computer model was also developed to calculate the number of theoretical separation stages using the test results. The effects of column diameter, metal foam and gas flow rate were identified.

  20. Tests of isotopic separation efficiency of palladium packed columns

    SciTech Connect (OSTI)

    Heung, L. K.; Staack, G. C.; Klein, J. E.; Jacobs, W. D.

    2008-07-15

    The isotopic effect of palladium has been applied in different ways to separate hydrogen isotopes for many years. At Savannah River Site palladium deposited on kieselguhr (Pd/k) is used in a thermal cycling absorption process (TCAP) to purify tritium for over ten years. The need to design columns for different throughputs and the desire to advance the performance of TCAP created the need to evaluate different column designs and packing materials for their separation efficiency. In this work, columns with variations in length, diameter and metal foam presence were tested using an isotope displacement method. A simple computer model was also developed to calculate the number of theoretical separation stages based on the test results. The effects of column diameter, metal foam presence and gas flow rate were identified. (authors)

  1. Generator for ionic gallium-68 based on column chromatography

    DOE Patents [OSTI]

    Neirinckx, Rudi D. (Medfield, MA); Davis, Michael A. (Westwood, MA)

    1981-01-01

    A physiologically acceptable solution of gallium-68 fluorides, having an activity of 0.1 to 50 millicuries per milliliter of solution is provided. The solution is obtained from a generator comprising germanium-68 hexafluoride bound to a column of an anion exchange resin which forms gallium-68 in situ by eluting the column with an acid solution to form a solution containing .sup.68 Ga-fluorides. The solution then is neutralized prior to administration.

  2. TCAP HYDROGEN ISOTOPE SEPARATION USING PALLADIUM AND INVERSE COLUMNS

    SciTech Connect (OSTI)

    Heung, L.; Sessions, H.; Xiao, S.

    2010-08-31

    The Thermal Cycling Absorption Process (TCAP) was further studied with a new configuration. Previous configuration used a palladium packed column and a plug flow reverser (PFR). This new configuration uses an inverse column to replace the PFR. The goal was to further improve performance. Both configurations were experimentally tested. The results showed that the new configuration increased the throughput by a factor of more than 2.

  3. Modelling aging effects on a thermal cycling absorption process column

    SciTech Connect (OSTI)

    Laquerbe, C.; Contreras, S.; Demoment, J.

    2008-07-15

    Palladium coated on alumina is used in hydrogen separation systems operated at CEA/Valduc, and more particularly in Thermal Cycling Absorption Process columns. With such materials, tritium decay is known to induce aging effects which have direct side effects on hydrogen isotopes absorption isotherms. Furthermore in a TCAP column, aging occurs in an heterogeneous way. The possible impacts of these intrinsic material evolutions on the separation performances are investigated here through a numerical approach. (authors)

  4. Independent Inventors: An Uncertain Future

    E-Print Network [OSTI]

    Pi, Xiaoqing

    2013-01-01

    https://www.eff.org/patent Inventors Alliance http://A.  Cotropia, “The Individual Inventor Motif in the Age of Title: Independent Inventors: An Uncertain Future Abstract:

  5. Planning numerical approximations Richard Power

    E-Print Network [OSTI]

    Williams, Sandra

    Planning numerical approximations Richard Power Sandra Williams 21st September 2009 #12;Table proportions (e.g., more than a quarter, 25.9 per cent) Proportions are a convenient well-defined subproblem Common in factual discourse (e.g., newspaper articles) Important for generating from data (but neglected

  6. Quasi-energy-independent solar neutrino transitions

    E-Print Network [OSTI]

    G. L. Fogli; E. Lisi; A. Palazzo

    2002-02-06

    Current solar, atmospheric, and reactor neutrino data still allow oscillation scenarios where the squared mass differences are all close to 10^-3 eV^2, rather than being hierarchically separated. For solar neutrinos, this situation (realized in the upper part of the so-called large-mixing angle solution) implies adiabatic transitions which depend weakly on the neutrino energy and on the matter density, as well as on the ``atmospheric'' squared mass difference. In such a regime of ``quasi-energy-independent'' (QEI) transitions, intermediate between the more familiar ``Mikheyev-Smirnov-Wolfenstein'' (MSW) and energy-independent (EI) regimes, we first perform analytical calculations of the solar nu_e survival probability at first order in the matter density, beyond the usual hierarchical approximations. We then provide accurate, generalized expressions for the solar neutrino mixing angles in matter, which reduce to those valid in the MSW, QEI and EI regimes in appropriate limits. Finally, a representative QEI scenario is discussed in some detail.

  7. Fourth-post-Newtonian-exact approximation to General Relativity

    E-Print Network [OSTI]

    David Brizuela; Gerhard Schaefer

    2010-04-12

    An approximation to General Relativity is presented that agrees with the Einstein field equations up to and including the fourth post-Newtonian (PN) order. This approximation is formulated in a fully constrained scheme: all involved equations are explicitly elliptic except the wave equation that describes the two independent degrees of freedom of the gravitational field. The formalism covers naturally the conformal-flat-condition (CFC) approach by Isenberg, Wilson, and Mathews and the improved second PN-order exact approach CFC+. For stationary configurations, like Kerr black holes, agreement with General Relativity is achieved even through 5PN order. In addition, a particularly interesting 2PN-exact waveless approximation is analyzed in detail, which results from imposing more restrictive conditions. The proposed scheme can be considered as a further development on the waveless approach suggested by Schaefer and Gopakumar [Phys. Rev. D {\\bf 69}, 021501 (2004)].

  8. Spectral Formation in X-Ray Pulsar Accretion Columns

    E-Print Network [OSTI]

    Peter A. Becker; Michael T. Wolff

    2005-03-03

    We present the first self-consistent model for the dynamics and the radiative transfer occurring in bright X-ray pulsar accretion columns, with a special focus on the role of the shock in energizing the emerging X-rays. The pressure inside the accretion column of a luminous X-ray pulsar is dominated by the photons, and consequently the equations describing the coupled radiative-dynamical structure must be solved simultaneously. Spectral formation in these sources is therefore a complex, nonlinear phenomenon. We obtain the analytical solution for the Green's function describing the upscattering of monochromatic radiation injected into the column from the thermal mound located near the base of the flow. The Green's function is convolved with a Planck distribution to model the X-ray spectrum resulting from the reprocessing of blackbody photons produced in the thermal mound. These photons diffuse through the infalling gas and eventually escape out the walls of the column, forming the observed X-ray spectrum. We show that the resulting column-integrated, phase-averaged spectrum has a power-law shape at high energies and a blackbody shape at low energies, in agreement with the observational data for many X-ray pulsars.

  9. Basic design and hydrodynamic analysis of three-column TLP and comparison with ISSC TLP 

    E-Print Network [OSTI]

    Sebastian, Abhilash

    2000-01-01

    Three-column TLP is a new design variation of the common four-column TLP. The objective of this study is to find the hydrodynamic feasibility of the three-column TLP. This accomplished by comparing the three-column design to the ISSC TLP. The ISSC...

  10. T. Larsson, S. Skogestad Control of a industrial heat integrated distillation column Control of a industrial

    E-Print Network [OSTI]

    Skogestad, Sigurd

    T. Larsson, S. Skogestad Control of a industrial heat integrated distillation column Control. Larsson, S. Skogestad Control of a industrial heat integrated distillation column The process QH columnE 1999 Annual meeting / 11.03.99 2 NTNU #12;T. Larsson, S. Skogestad Control of a industrial heat

  11. Strategies for measurement of atmospheric column means of carbon dioxide from aircraft using discrete sampling

    E-Print Network [OSTI]

    Stephens, Britton B.

    Strategies for measurement of atmospheric column means of carbon dioxide from aircraft using and Structure: Instruments and techniques; KEYWORDS: carbon dioxide, column mean, column integral, COBRA, flask, Strategies for measurement of atmospheric column means of carbon dioxide from aircraft using discrete

  12. Engineering Development of Slurry Bubble Column Reactor (SBCR) Technology

    SciTech Connect (OSTI)

    Toseland, B.A.

    1998-10-29

    The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large diameter reactors.

  13. Effects of system densities on distillation column performance

    SciTech Connect (OSTI)

    Fasesan, S.O.; Sanni, S.A.; Taiwo, E.A. [Obafemi Awolowo Univ., Ile-Ife (Nigeria). Dept. of Chemical Engineering

    1998-06-01

    Distillation experiments were carried out on three binary systems (ethanol-butanol, ethanol-propan-2-ol, and propan-2-ol-butanol) in a 0.1-m internal diameter glass column packed with 8 mm diameter Raschig rings. The experiments were performed under total reflux conditions and at atmospheric pressure. The data collected on column performance showed that performance declined with increasing average bulk liquid density. The results also lend credence to earlier reports on the behavior of column performance with respect to component concentration in the feed mixtures. The system densities of the three binary systems were measured at four different temperatures, 30, 40, 50, and 60 C. The data were compared with the predicted data of Yen-Woods and Multifluid models. The accuracy of the predictions of the Yen-Woods model was rather poor while that of the Multifluid model was very encouraging.

  14. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY

    SciTech Connect (OSTI)

    Bernard A. Toseland, Ph.D.

    2002-01-01

    The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large diameter reactors.

  15. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY

    SciTech Connect (OSTI)

    Bernard A. Toseland

    1998-06-30

    The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column rector to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large diameter reactors.

  16. Liquid-phase mixing in churn-turbulent bubble columns

    SciTech Connect (OSTI)

    Myers, K.J.; Dudukovic, M.P.; Ramachandran, P.A.

    1985-01-01

    A physically realistic description of liquid mixing is necessary for the proper design and scale-up of bubble columns. Currently, liquid-phase mixing is almost exclusively described by the one-dimensional axial dispersion model which lacks a sound physical basis. A new phenomenological model of liquid-phase backmixing in churn-turbulent bubble columns has been proposed. This model divides the system into two regions. The first region is a gas-rich region that rises rapidly through the column transporting liquid to various points in the system. The second region is a relatively stagnant, gas-lean region that is vigorously agitated by the passage of the gas-rich region. Evaluation of most of the model parameters by physical reasoning reduces the proposed model to a one-parameter model.

  17. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY

    SciTech Connect (OSTI)

    Bernard A. Toseland, Ph.D.

    2000-01-01

    The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large diameter reactors.

  18. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY

    SciTech Connect (OSTI)

    Bernard A. Toseland

    2002-09-30

    The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large diameter reactors.

  19. ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY

    SciTech Connect (OSTI)

    Bernard A. Toseland, Ph.D.

    2000-06-01

    The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column 0reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large diameter reactors.

  20. IEAB Independent Economic Analysis Board

    E-Print Network [OSTI]

    . Huppert Noelwah R. Netusil JunJie Wu Cost-Effectiveness of Fish Tagging Technologies and Programs in the Columbia River Basin1 Independent Economic Analysis Board Fish and Wildlife Program Northwest Power and Conservation Council June 2, 2013 1 This report benefitted from the meetings of the Fish Tagging Forum

  1. Catalysis Research for Energy Independence

    E-Print Network [OSTI]

    -conversions to significantly reduce the carbon footprint of the global energy system. We provide a fundamental understandingCatalysis Research for Energy Independence Chemical transformations are at the heart of energy production and use, and catalysis lies at the core of efficiently and effectively using our current energy

  2. IEAB Independent Economic Analysis Board

    E-Print Network [OSTI]

    would be most cost effective when electricity prices are high. Further, reduced pumping in dry years be tailored to respond to contingencies such as electricity price surges and unusually dry weather. Inclusion of Instream Water Supply Components of the Salmon Creek Project Independent Economic Analysis Board Northwest

  3. An investigation of the buckling criteria of columns that have large angles of initial twist 

    E-Print Network [OSTI]

    Jordan, Basil Magee, Jr

    1962-01-01

    and Experimental Data. 19 10 12 15 17 18 Deflection Curve Showing the Buckle. ng Criteria for a Straight Column. . . , . . . . . . . . 27 Deflection Curves for Columns Having Initial Twist and an (L/r) Value oi' 298. . . . . . . . . . . 52 Deflection... Curves for Columns Having Initial Twis't and an (L/r) Value of 256 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 53 Deflection Curves for Columns Having Initial Twist and an (L/r) Value of 215. . . . . ~ . ~ ~ ~ ~ 54 Defleotion Curves for Columns Having Initial Twist...

  4. Integration and Independent Innovation on a Network

    E-Print Network [OSTI]

    Farrell, Joseph

    2012-01-01

    Integration and Independent Innovation on a Network JosephKeywords: telecom networks, innovation, competition, accesspoint of monopoly. Innovation thrives with many independent

  5. Independent Oversight Review, Los Alamos National Laboratory...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    December 2011 Independent Oversight Review, Los Alamos National Laboratory - December 2011 December 2011 Review of the Independent Integrated Safety ManagementIntegrated Work...

  6. 2012 Independent Communication and Outreach Stakeholder Satisfaction...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2 Independent Communication and Outreach Stakeholder Satisfaction Survey 2012 Independent Communication and Outreach Stakeholder Satisfaction Survey DOE-LM periodically surveys its...

  7. Independent Oversight Focused Program Review, Argonne National...

    Energy Savers [EERE]

    Independent Oversight Focused Program Review, Argonne National Laboratory-West - May 2001 Independent Oversight Focused Program Review, Argonne National Laboratory-West - May 2001...

  8. Independent Oversight Investigation, Hanford Site - April 2004...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Independent Oversight Investigation, Hanford Site - April 2004 Independent Oversight Investigation, Hanford Site - April 2004 April 2004 Investigation of Worker Vapor Exposure and...

  9. Independent Activity Report, Richland Operations Office - June...

    Office of Environmental Management (EM)

    Independent Activity Report, Richland Operations Office - June 2011 June 2011 Hanford Sludge Treatment Project Review HIAR-RL-2011-06-17 This Independent Activity Report...

  10. Linear Value Function Approximation Linear Models

    E-Print Network [OSTI]

    Parr, Ronald

    Linear Value Function Approximation and Linear Models Ronald Parr Duke University Joint work terminology · Various forms of linear value function approximation · Linear approximate model formulation #12;Outline · Introduce terminology · Various forms of linear value function approximation · Linear

  11. LUBRICATION APPROXIMATION WITH PRESCRIBED NONZERO CONTACT ANGLE

    E-Print Network [OSTI]

    Otto, Felix

    LUBRICATION APPROXIMATION WITH PRESCRIBED NONZERO CONTACT ANGLE Felix Otto Department--time existence for a weak solution s(t; x) â?? 0 of the lubrication approximation @ t s + @ x (s @ 3 x s) = 0 in fs will later motivate the way we construct approximate solutions for the lubrication approximation we are going

  12. The Equivalence between Row and Column Linear Regression

    E-Print Network [OSTI]

    Tresp, Volker

    The Equivalence between Row and Column Linear Regression: A Surprising Feature of Linear Regression and Communications 81730 M¨unchen, Germany Abstract The rows of the design matrix in linear regression are the inputs of the training data set. Normal regression is row regression: the goal is to predict a training target from

  13. Plastic Hinging Behavior of Reinforced Concrete Bridge Columns

    E-Print Network [OSTI]

    Firat Alemdar, Zeynep

    2010-04-27

    of the seismic performance of four-span large-scale bridge systems at the University of Nevada Reno that details deformations in column hinging regions during response to strong shaking events. In order to evaluate the plastic hinging regions, a photogrammetric...

  14. Efficien and Scalable Data Evolution with Column Oriented Databases

    E-Print Network [OSTI]

    Chen, Yi

    Efficien and Scalable Data Evolution with Column Oriented Databases Ziyang Liu1 , Bin He2 , Hui@us.ibm.com, hhsiao@almaden.ibm.com, yi@asu.edu ABSTRACT Database evolution is the process of updating the schema of a database or data warehouse (schema evolution) and e- volving the data to the updated schema (data evolution

  15. Thermal Analysis for Ion-Exchange Column System

    SciTech Connect (OSTI)

    Lee, Si Y.; King, William D.

    2012-12-20

    Models have been developed to simulate the thermal characteristics of crystalline silicotitanate ion exchange media fully loaded with radioactive cesium either in a column configuration or distributed within a waste storage tank. This work was conducted to support the design and operation of a waste treatment process focused on treating dissolved, high-sodium salt waste solutions for the removal of specific radionuclides. The ion exchange column will be installed inside a high level waste storage tank at the Savannah River Site. After cesium loading, the ion exchange media may be transferred to the waste tank floor for interim storage. Models were used to predict temperature profiles in these areas of the system where the cesium-loaded media is expected to lead to localized regions of elevated temperature due to radiolytic decay. Normal operating conditions and accident scenarios (including loss of solution flow, inadvertent drainage, and loss of active cooling) were evaluated for the ion exchange column using bounding conditions to establish the design safety basis. The modeling results demonstrate that the baseline design using one central and four outer cooling tubes provides a highly efficient cooling mechanism for reducing the maximum column temperature. In-tank modeling results revealed that an idealized hemispherical mound shape leads to the highest tank floor temperatures. In contrast, even large volumes of CST distributed in a flat layer with a cylindrical shape do not result in significant floor heating.

  16. Distributed Computing Column 36 Distributed Computing: 2009 Edition

    E-Print Network [OSTI]

    Distributed Computing Column 36 Distributed Computing: 2009 Edition Idit Keidar Dept. of Electrical computing events. Awards First, let's look at awards. This year we learned that two women were recognized with ACM and IEEE prestigious awards for their achievements in, (among other things), distributed computing

  17. Indistinguishability of independent single photons

    E-Print Network [OSTI]

    F. W. Sun; C. W. Wong

    2009-02-02

    The indistinguishability of independent single photons is presented by decomposing the single photon pulse into the mixed state of different transform limited pulses. The entanglement between single photons and outer environment or other photons induces the distribution of the center frequencies of those transform limited pulses and makes photons distinguishable. Only the single photons with the same transform limited form are indistinguishable. In details, the indistinguishability of single photons from the solid-state quantum emitter and spontaneous parametric down conversion is examined with two-photon Hong-Ou-Mandel interferometer. Moreover, experimental methods to enhance the indistinguishability are discussed, where the usage of spectral filter is highlighted.

  18. An approximation technique for jet impingement flow

    SciTech Connect (OSTI)

    Najafi, Mahmoud; Fincher, Donald; Rahni, Taeibi; Javadi, KH.; Massah, H.

    2015-03-10

    The analytical approximate solution of a non-linear jet impingement flow model will be demonstrated. We will show that this is an improvement over the series approximation obtained via the Adomian decomposition method, which is itself, a powerful method for analysing non-linear differential equations. The results of these approximations will be compared to the Runge-Kutta approximation in order to demonstrate their validity.

  19. Background independent exact renormalization group for conformally reduced gravity

    E-Print Network [OSTI]

    Juergen A. Dietz; Tim R. Morris

    2015-04-27

    Within the conformally reduced gravity model, where the metric is parametrised by a function $f(\\phi)$ of the conformal factor $\\phi$, we keep dependence on both the background and fluctuation fields, to local potential approximation and $\\mathcal{O}(\\partial^2)$ respectively, making no other approximation. Explicit appearances of the background metric are then dictated by realising a remnant diffeomorphism invariance. The standard non-perturbative Renormalization Group (RG) scale $k$ is inherently background dependent, which we show in general forbids the existence of RG fixed points with respect to $k$. By utilising transformations that follow from combining the flow equations with the modified split Ward identity, we uncover a unique background independent notion of RG scale, $\\hat k$. The corresponding RG flow equations are then not only explicitly background independent along the entire RG flow but also explicitly independent of the form of $f$. In general $f(\\phi)$ is forced to be scale dependent and needs to be renormalised, but if this is avoided then $k$-fixed points are allowed and furthermore they coincide with $\\hat k$-fixed points.

  20. Low rank approximations of matrices and tensors

    E-Print Network [OSTI]

    Friedland, Shmuel

    Low rank approximations of matrices and tensors S. Friedland, V. Mehrmann, A. Miedlar and M, 2008 S. Friedland, V. Mehrmann, A. Miedlar and M. Nkengla Low rank approximations of matrices and tensors #12;Overview S. Friedland, V. Mehrmann, A. Miedlar and M. Nkengla Low rank approximations

  1. Bubble column apparatus for separating wax from catalyst slurry

    DOE Patents [OSTI]

    Neathery, James K.; Davis, Burtron H.

    2004-07-13

    Novel methods and devices for production of liquid hydrocarbon products from gaseous reactants are disclosed. In one aspect, a method for separating a liquid hydrocarbon, typically a wax, from a catalyst containing slurry is provided, comprising passing the slurry through at least one downcomer extending from an overhead separation chamber and discharging into the bottom of a slurry bubble column reactor. The downcomer includes a cross-flow filtration element for separating a substantially particle-free liquid hydrocarbon for downstream processing. In another aspect, a method for promoting plug-flow movement in a recirculating slurry bubble column reactor is provided, comprising discharging the recirculating slurry into the reactor through at least one downcomer which terminates near the bottom of the reactor. Devices for accomplishing the above methods are also provided.

  2. Method of recovering adsorbed liquid compounds from molecular sieve columns

    DOE Patents [OSTI]

    Burkholder, H.R.; Fanslow, G.E.

    1983-12-20

    Molecularly adsorbed volatile liquid compounds are recovered from molecular sieve adsorbent columns by directionally applying microwave energy to the bed of the adsorbent to produce a mixed liquid-gas effluent. The gas portion of the effluent generates pressure within the bed to promote the discharge of the effluent from the column bottoms. Preferably the discharged liquid-gas effluent is collected in two to three separate fractions, the second or intermediate fraction having a substantially higher concentration of the desorbed compound than the first or third fractions. The desorption does not need to be assisted by passing a carrier gas through the bed or by applying reduced pressure to the outlet from the bed. 8 figs.

  3. Method of recovering adsorbed liquid compounds from molecular sieve columns

    DOE Patents [OSTI]

    Burkholder, Harvey R. (Ames, IA); Fanslow, Glenn E. (Ames, IA)

    1983-01-01

    Molecularly adsorbed volatile liquid compounds are recovered from molecular sieve adsorbent columns by directionally applying microwave energy to the bed of the adsorbent to produce a mixed liquid-gas effluent. The gas portion of the effluent generates pressure within the bed to promote the discharge of the effluent from the column bottoms. Preferably the discharged liquid-gas effluent is collected in two to three separate fractions, the second or intermediate fraction having a substantially higher concentration of the desorbed compound than the first or third fractions. The desorption does not need to be assisted by passing a carrier gas through the bed or by applying reduced pressure to the outlet from the bed.

  4. Evaluation of Packed Columns in Supercritical Extraction Processes 

    E-Print Network [OSTI]

    Rathkamp, P. J.; Fair, J. R.; Humphrey, J. L.

    1986-01-01

    was extracted in a spray column using super critical carbon dioxide. Mass transfer coefficients were determined to be more than ten times greater than those associated with conventional liquid extraction systems. In a mass transfer study at near... the results of this study have shown mass transfer advantages for SFE, it is a process which requires high pressure equipment including 167 ESL-IE-86-06-28 Proceedings from the Eighth Annual Industrial Energy Technology Conference, Houston, TX, June 17...

  5. Measurements of Heat Transfer Coefficients to Cylinders in Shallow Bubble Columns

    E-Print Network [OSTI]

    Tow, Emily W.

    High heat transfer coefficients and large interfacial areas make bubble columns ideal for dehumidification. However, the effect of geometry on the heat transfer coefficients outside cooling coils in shallow bubble columns, ...

  6. Methane oxidation in the eastern tropical North Pacific Ocean water column

    E-Print Network [OSTI]

    2015-01-01

    of methane in distilled water and seawater, J. Chem. Eng.Paci?c (ETP) Ocean • Water column MO x strongly mitigatesD. M. Lavoie (1983), Upper water column methane geochemistry

  7. PLC-9 Non Rusting Stainless Steel Column 10" Square with Radius Corners

    E-Print Network [OSTI]

    Stuart, Steven J.

    PLC-9 Non Rusting Stainless Steel Column 10" Square with Radius Corners Unit includes two lights General Specifications of PLC-9 Column Non Rusting, Non Magnetic Stainless Steel - .125" Thick Dimensions

  8. Chloride and Lithium Transport in Large Arrays of Undisturbed Silt Loam and Sandy Loam Soil Columns

    E-Print Network [OSTI]

    Chloride and Lithium Transport in Large Arrays of Undisturbed Silt Loam and Sandy Loam Soil Columns al., 1998); and (iii) sloping lay- were extremely variable among columns. Lithium adsorption

  9. Application of a Plantwide Control Design Procedure to a Distillation Column with Heat Pump

    E-Print Network [OSTI]

    Skogestad, Sigurd

    (Larsson & Skogestad 2001) to a distillation column heat-integrated by using a heatpump. Top-down analysis) and apply it to a distillation column with heatpump. Plantwide control design should start by formulating

  10. Engineered Barrier Systems Thermal-Hydraulic-Chemical Column Test Report

    SciTech Connect (OSTI)

    W.E. Lowry

    2001-12-13

    The Engineered Barrier System (EBS) Thermal-Hydraulic-Chemical (THC) Column Tests provide data needed for model validation. The EBS Degradation, Flow, and Transport Process Modeling Report (PMR) will be based on supporting models for in-drift THC coupled processes, and the in-drift physical and chemical environment. These models describe the complex chemical interaction of EBS materials, including granular materials, with the thermal and hydrologic conditions that will be present in the repository emplacement drifts. Of particular interest are the coupled processes that result in mineral and salt dissolution/precipitation in the EBS environment. Test data are needed for thermal, hydrologic, and geochemical model validation and to support selection of introduced materials (CRWMS M&O 1999c). These column tests evaluated granular crushed tuff as potential invert ballast or backfill material, under accelerated thermal and hydrologic environments. The objectives of the THC column testing are to: (1) Characterize THC coupled processes that could affect performance of EBS components, particularly the magnitude of permeability reduction (increases or decreases), the nature of minerals produced, and chemical fractionation (i.e., concentrative separation of salts and minerals due to boiling-point elevation). (2) Generate data for validating THC predictive models that will support the EBS Degradation, Flow, and Transport PMR, Rev. 01.

  11. Laboratory Glass Columns "Next Generation" technology for high-performance preparative chromatography

    E-Print Network [OSTI]

    Lebendiker, Mario

    SNAP ® Laboratory Glass Columns "Next Generation" technology for high-performance preparative lesiones graves o la muerte! WARNING Glass SNAP® columns are intended for use in a liquid environment disassembly or cleaning for scratches, chips or defects, particularly on the glass surfaces. DO NOT use column

  12. T. Larsson, S. Skogestad Control of a industrial heat integrated distillation column Control of a industrial

    E-Print Network [OSTI]

    Skogestad, Sigurd

    T. Larsson, S. Skogestad Control of a industrial heat integrated distillation column Control. Larsson, S. Skogestad Control of a industrial heat integrated distillation column The process Q H columnPROMS. AIChE 1999 Annual meeting / 11.03.99 2 NTNU #12; T. Larsson, S. Skogestad Control of a industrial heat

  13. Control of a Industrial Heat Integrated Distillation Column T. Larsson and S. Skogestad

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Control of a Industrial Heat Integrated Distillation Column T. Larsson and S. Skogestad Department. It is well known which variables to control in normal distillation columns. But for heat integrated for heat integrated distillation columns. We will use the concept of self­optimizing control (Skogestad et

  14. Control of a Industrial Heat Integrated Distillation Column T. Larsson and S. Skogestad

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Control of a Industrial Heat Integrated Distillation Column T. Larsson and S. Skogestad Department. It is well known which variables to control in normal distillation columns. But for heat integrated for heat integrated distillation columns. We will use the concept of self-optimizing control (Skogestad et

  15. Satelliteobservations,AT2 INVERTING GOME FORMALDEHYDE COLUMN FOR BIOGENIC EMISSIONS OVER EUROPE

    E-Print Network [OSTI]

    Curci, Gabriele

    Satelliteobservations,AT2 INVERTING GOME FORMALDEHYDE COLUMN FOR BIOGENIC EMISSIONS OVER EUROPE formaldehyde (HCHO) column data retrieved from GOME over the European continent. Formaldehyde is an important with model simulations focusing on the European continent. Our results suggest that the formaldehyde column

  16. Seasonal and interannual variability of North American isoprene emissions as determined by formaldehyde column measurements from

    E-Print Network [OSTI]

    Palmer, Paul

    by formaldehyde column measurements from space Dorian S. Abbot,1 Paul I. Palmer,1 Randall V. Martin,2 Kelly V June 2003; published 5 September 2003. [1] Formaldehyde (HCHO) columns measured from space by solar UV of North American isoprene emissions as determined by formaldehyde column measurements from space, Geophys

  17. Formaldehyde columns from the Ozone Monitoring Instrument: Urban versus background levels and evaluation using aircraft

    E-Print Network [OSTI]

    Mlllet, Dylan B.

    Formaldehyde columns from the Ozone Monitoring Instrument: Urban versus background levels formaldehyde column (WHCHO) retrievals from the Ozone Monitoring Instrument (OMI) and assess the information (20­200 km) near many urban areas. Citation: Boeke, N. L., et al. (2011), Formaldehyde columns from

  18. Functional Analysis of the Vertebral Column based on MR and Direct Volume Rendering

    E-Print Network [OSTI]

    Blanz, Volker

    Functional Analysis of the Vertebral Column based on MR and Direct Volume Rendering P. Hastreiter1 of Neurosurgery, University of Erlangen­Nuremberg, Germany Abstract. Degenerative diseases of the vertebral column suggest a coarse segmentation of the vertebral column. This is achieved with a fast sequence of filtering

  19. DEVELOPMENT OF THE VERTEBRAL COLUMN, FINS AND FIN SUPPORTS, BRANCHIOSTEGAL RAYS, AND SQUAMATION

    E-Print Network [OSTI]

    DEVELOPMENT OF THE VERTEBRAL COLUMN, FINS AND FIN SUPPORTS, BRANCHIOSTEGAL RAYS, AND SQUAMATION of the vertebral column and the structure of the vertebrae are described in detail. The ribs in Xiphias are unusual of the fins and fin supports and vertebral column to afford com- parisons of Xiphias with other fishes

  20. A Formal Model of Auditor Independence Risk

    E-Print Network [OSTI]

    Turner, Jerry L.; Mock, Theodore J.; Srivastava, Rajendra P.

    2002-01-01

    Although the published literature on auditor independence is extensive, an accepted comprehensive theory, framework or model of auditor independence risk does not exist. This paper develops a formal model of auditor ...

  1. Arsenic cycling within the water column of a small lake receiving contaminated ground-water discharge

    SciTech Connect (OSTI)

    Ford, Robert G.; Wilkin, Richard T.; Hernandez, Gina (EPA); (ECO)

    2008-09-18

    The fate of arsenic discharged from contaminated ground water to a small, shallow lake at a hazardous waste site was examined to understand the role of iron (hydr)oxide precipitation-dissolution processes within the water column. Field and laboratory observations indicate that arsenic solubility was controlled, in part, by the extent of ferrous iron oxidation-precipitation and arsenic sorption occurring near the lake chemocline. Laboratory experiments were conducted using site-derived water to assess the impact of these coupled processes on the removal of dissolved arsenic from the water column. The measured concentration of organic carbon from epilimnetic and hypolimnetic water sampled from the lake was approximately 1.3 mM and 17.0 mM, respectively. Experiments conducted with these samples along with synthetic controls containing no organic carbon demonstrated that observed rates of formation and crystallinity of the precipitated iron (hydr)oxide were dependent on the concentration of organic carbon in the lake water. Increasing dissolved organic matter concentration did not significantly interfere with ferrous iron oxidation, but inhibited iron (hydr)oxide precipitation and subsequent sorption of arsenic. For experiments using water sampled from the lake hypolimnion there was a strong relationship between the fraction of precipitated iron and the fraction of sorbed arsenic. Laboratory- and field-derived iron (hydr)oxide precipitates were characterized to evaluate mineralogy and arsenic distribution. In-situ suspended solids and precipitates formed in laboratory experiments using hypolimnetic water were identified as poorly crystalline 2-line ferrihydrite. These solids were readily dissolved in the presence of dithionite indicating that elevated dissolved iron and arsenic observed in the hypolimnion resulted, in part, from in-situ reductive dissolution of settling 2-line ferrihydrite near the sediment-water interface. These observations support the contention that the levels of dissolved arsenic observed in the shallow lake can be attributed to ground-water discharge and internal recycling of arsenic within the water column. The efficiency of the process resulting in iron (hydr)oxide precipitation and arsenic sorption limits the downgradient export of arsenic derived from ground-water discharge.

  2. Independent Oversight Review, West Valley Demonstration Project...

    Office of Environmental Management (EM)

    Oversight Review, West Valley Demonstration Project Transportation - September 2000 Independent Oversight Review, West Valley Demonstration Project Transportation -...

  3. Independent Oversight Assessment, DOE Office of Environmental...

    Office of Environmental Management (EM)

    Assessment, Idaho Cleanup Project Sodium Bearing Waste Treatment Project - November 2012 Independent Oversight Assessment, Salt Waste Processing Facility Project - January...

  4. Small Wind Independent Testing (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-09-01

    This fact sheet describes the Small Wind Independent Testing at the NWTC and the Regional Test Centers project.

  5. Independent Oversight Review, West Valley Demonstration Project...

    Office of Environmental Management (EM)

    West Valley Demonstration Project Transportation - September 2000 Independent Oversight Review, West Valley Demonstration Project Transportation - September 2000 September 2000...

  6. Independent Oversight Review, National Nuclear Security Administration...

    Office of Environmental Management (EM)

    Nuclear Security Administration Production Office - February 2014 Independent Oversight Review, National Nuclear Security Administration Production Office - February 2014 February...

  7. Spatial distribution of isoprene emissions from North America derived from formaldehyde column measurements by the OMI satellite sensor

    E-Print Network [OSTI]

    Chance, Kelly

    Spatial distribution of isoprene emissions from North America derived from formaldehyde column isoprene emission from North America. OMI HCHO columns for June-August 2006 are consistent distribution of OMI HCHO columns follows that of isoprene emission; anthropogenic hydrocarbon emissions

  8. History-Independent Cuckoo Hashing Udi Wieder

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    History-Independent Cuckoo Hashing Moni Naor Gil Segev Udi Wieder§ Abstract Cuckoo hashing significant improvements compared to other schemes. In this work we construct a practical history-independent dynamic dictionary based on cuckoo hashing. In a history-independent data structure, the memory

  9. Film/Literature Independent Study English 499

    E-Print Network [OSTI]

    Film/Literature Independent Study English 499 Syllabus Instructor: Office: Office phone: Email address: English Dept. Phone: 360-546-9441 Overview The goal of the Film/Literature Independent Study is to help students concentrate on a particular film or literary issue or topic. This independent study

  10. Near approximations via general ordered topological spaces

    E-Print Network [OSTI]

    M. Abo-Elhamayel

    2014-12-27

    Rough set theory is a new mathematical approach to imperfect knowledge. The notion of rough sets is generalized by using an arbitrary binary relation on attribute values in information systems, instead of the trivial equality relation. The topology induced by binary relations is used to generalize the basic rough set concepts. This paper studies near approximation via general ordered topological approximation spaces which may be viewed as a generalization of the study of near approximation from the topological view. The basic concepts of some increasing (decreasing) near approximations, increasing (decreasing) near boundary regions and increasing (decreasing) near accuracy were introduced and sufficiently illustrated. Moreover, proved results, implications and add examples.

  11. APPROXIMATION OF ELECTROMAGNETIC FIELDS: PART I ...

    E-Print Network [OSTI]

    2003-08-06

    Opérateurs, 1984, Commissariat `a l'Energie Atomique, Masson, Paris. [10] J. DOUGLAS, JR., J. E. SANTOS, AND D. SHEEN, Approximation of scalar waves in ...

  12. Lower bounds for approximate factorizations via semidefinite ...

    E-Print Network [OSTI]

    ABSTRACT The problem of approximately factoring a real or complex multivariate polynomial f seeks minimal perturbations ? f to the coefficients of the input ...

  13. Optimization Online - Probabilistic optimization via approximate p ...

    E-Print Network [OSTI]

    W. van vAckooij

    2015-05-27

    May 27, 2015 ... Probabilistic optimization via approximate p-efficient points and bundle methods. W. van vAckooij(wim.van-ackooij ***at*** edf.fr )

  14. Approximations by Orthonormal Mapped Chebyshev Functions for ...

    E-Print Network [OSTI]

    2014-03-12

    a School of Mathematical Science, Xiamen University, 361005 Xiamen, China .... suitable mapping can be used to approximate functions on the whole line R (cf.

  15. ARM - Field Campaign - Fall 1995 Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01)govCampaignsFIRE-Arctic Cloud Experiment/SHEBA ARMSingle Column

  16. ARM - Field Campaign - Spring Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column Model IOP ARM Data Discovery Browse Data

  17. ARM - Field Campaign - Summer 1994 Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column Model IOP ARM Data Discovery

  18. ARM - Field Campaign - Summer 1995 Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column Model IOP ARM Data DiscoverygovCampaignsSummer

  19. ARM - Field Campaign - Summer Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column Model IOP ARM DatagovCampaignsSummer Single

  20. ARM - Field Campaign - Summer Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column Model IOP ARM DatagovCampaignsSummer

  1. ARM - Field Campaign - Two-Column Aerosol Project (TCAP)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column Model

  2. ARM - Field Campaign - Winter 1994 Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single ColumngovCampaignsWinter 1994 Single Column Model IOP

  3. ARM - Field Campaign - Winter Single Column Model IOP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single ColumngovCampaignsWinter 1994 Single Column

  4. Approximate Euclidean Ramsey theorems Adrian Dumitrescu

    E-Print Network [OSTI]

    Dumitrescu, Adrian

    Approximate Euclidean Ramsey theorems Adrian Dumitrescu October 27, 2010 Abstract According condition is needed in this case. Keywords: Euclidean Ramsey theory, approximate arithmetic progression result of Ramsey from 1930: Theorem 1 (Ramsey [24]). Let p q, and r be positive integers

  5. APPROXIMATE SIMULATION RELATIONS FOR HYBRID SYSTEMS 1

    E-Print Network [OSTI]

    Pappas, George J.

    . Pappas Department of Electrical and Systems Engineering University of Pennsylvania Philadelphia, PA been introduced as a powerful tool for the approximation of discrete and continuous systems systems approximation. An example of application in the context of safety verification is shown. Keywords

  6. APPROXIMATION RESULTS FOR REFLECTIONLESS JACOBI MATRICES

    E-Print Network [OSTI]

    Remling, Christian

    APPROXIMATION RESULTS FOR REFLECTIONLESS JACOBI MATRICES ALEXEI POLTORATSKI AND CHRISTIAN REMLING Abstract. We study spaces of reflectionless Jacobi matrices. The main theme is the following type of question: Given a reflectionless Jacobi matrix, is it possible to approximate it by other reflection- less

  7. The Two-Column Aerosol Project (TCAP) Science Plan

    SciTech Connect (OSTI)

    Berkowitz, CM; Berg, LK; Cziczo, DJ; Flynn, CJ; Kassianov, EI; Fast, JD; Rasch, PJ; Shilling, JE; Zaveri, RA; Zelenyuk, A; Ferrare, RA; Hostetler, CA; Cairns, B; Russell, PB; Ervens, B

    2011-07-27

    The Two-Column Aerosol Project (TCAP) field campaign will provide a detailed set of observations with which to (1) perform radiative and cloud condensation nuclei (CCN) closure studies, (2) evaluate a new retrieval algorithm for aerosol optical depth (AOD) in the presence of clouds using passive remote sensing, (3) extend a previously developed technique to investigate aerosol indirect effects, and (4) evaluate the performance of a detailed regional-scale model and a more parameterized global-scale model in simulating particle activation and AOD associated with the aging of anthropogenic aerosols. To meet these science objectives, the Atmospheric Radiation Measurement (ARM) Climate Research Facility will deploy the ARM Mobile Facility (AMF) and the Mobile Aerosol Observing System (MAOS) on Cape Cod, Massachusetts, for a 12-month period starting in the summer of 2012 in order to quantify aerosol properties, radiation, and cloud characteristics at a location subject to both clear and cloudy conditions, and clean and polluted conditions. These observations will be supplemented by two aircraft intensive observation periods (IOPs), one in the summer and a second in the winter. Each IOP will deploy one, and possibly two, aircraft depending on available resources. The first aircraft will be equipped with a suite of in situ instrumentation to provide measurements of aerosol optical properties, particle composition and direct-beam irradiance. The second aircraft will fly directly over the first and use a multi-wavelength high spectral resolution lidar (HSRL) and scanning polarimeter to provide continuous optical and cloud properties in the column below.

  8. An improved proximity force approximation for electrostatics

    E-Print Network [OSTI]

    C. D. Fosco; F. C. Lombardo; F. D. Mazzitelli

    2012-04-23

    A quite straightforward approximation for the electrostatic interaction between two perfectly conducting surfaces suggests itself when the distance between them is much smaller than the characteristic lengths associated to their shapes. Indeed, in the so called "proximity force approximation" the electrostatic force is evaluated by first dividing each surface into a set of small flat patches, and then adding up the forces due two opposite pairs, the contribution of which are approximated as due to pairs of parallel planes. This approximation has been widely and successfully applied to different contexts, ranging from nuclear physics to Casimir effect calculations. We present here an improvement on this approximation, based on a derivative expansion for the electrostatic energy contained between the surfaces. The results obtained could be useful to discuss the geometric dependence of the electrostatic force, and also as a convenient benchmark for numerical analyses of the tip-sample electrostatic interaction in atomic force microscopes.

  9. Approximate error conjugation gradient minimization methods

    DOE Patents [OSTI]

    Kallman, Jeffrey S

    2013-05-21

    In one embodiment, a method includes selecting a subset of rays from a set of all rays to use in an error calculation for a constrained conjugate gradient minimization problem, calculating an approximate error using the subset of rays, and calculating a minimum in a conjugate gradient direction based on the approximate error. In another embodiment, a system includes a processor for executing logic, logic for selecting a subset of rays from a set of all rays to use in an error calculation for a constrained conjugate gradient minimization problem, logic for calculating an approximate error using the subset of rays, and logic for calculating a minimum in a conjugate gradient direction based on the approximate error. In other embodiments, computer program products, methods, and systems are described capable of using approximate error in constrained conjugate gradient minimization problems.

  10. Product-state Approximations to Quantum Ground States

    E-Print Network [OSTI]

    Fernando G. S. L. Brandão; Aram W. Harrow

    2014-12-15

    The local Hamiltonian problem consists of estimating the ground-state energy (given by the minimum eigenvalue) of a local quantum Hamiltonian. First, we show the existence of a good product-state approximation for the ground-state energy of 2-local Hamiltonians with one or more of the following properties: (1) high degree, (2) small expansion, or (3) a ground state with sublinear entanglement with respect to some partition into small pieces. The approximation based on degree is a surprising difference between quantum Hamiltonians and classical CSPs (constraint satisfaction problems), since in the classical setting, higher degree is usually associated with harder CSPs. The approximation based on low entanglement, in turn, was previously known only in the regime where the entanglement was close to zero. Since the existence of a low-energy product state can be checked in NP, the result implies that any Hamiltonian used for a quantum PCP theorem should have: (1) constant degree, (2) constant expansion, (3) a "volume law" for entanglement with respect to any partition into small parts. Second, we show that in several cases, good product-state approximations not only exist, but can be found in polynomial time: (1) 2-local Hamiltonians on any planar graph, solving an open problem of Bansal, Bravyi, and Terhal, (2) dense k-local Hamiltonians for any constant k, solving an open problem of Gharibian and Kempe, and (3) 2-local Hamiltonians on graphs with low threshold rank, via a quantum generalization of a recent result of Barak, Raghavendra and Steurer. Our work introduces two new tools which may be of independent interest. First, we prove a new quantum version of the de Finetti theorem which does not require the usual assumption of symmetry. Second, we describe a way to analyze the application of the Lasserre/Parrilo SDP hierarchy to local quantum Hamiltonians.

  11. Independent Oversight Review, Richland Operations Office and...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and work management and control processes in the areas of conduct of operations, quality assurance, and integrated safety management. Independent Oversight Review, Richland...

  12. Independent Oversight Inspection, Sandia National Laboratories...

    Energy Savers [EERE]

    Emergency Management at the Sandia Site Office and Sandia National Laboratories, New Mexico, Volume III This report provides the results of an independent oversight inspection of...

  13. Independent Oversight Evaluation, Pantex Plant - November 2000...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Evaluation, Pantex Plant - November 2000 Independent Oversight Evaluation, Pantex Plant - November 2000 November 2000 Evaluation of the Pantex Plant Emergency Response Exercise...

  14. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    3 Independent Oversight Review, Waste Treatment and Immobilization Plant - March 2013 March 2013 Review of the Hanford Site Waste Treatment and Immobilization Plant Construction...

  15. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    2 Independent Oversight Review, Waste Treatment and Immobilization Plant - March 2012 March 2012 Review of the Hanford Site Waste Treatment and Immobilization Plant Project...

  16. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    August 2011 Independent Oversight Review, Waste Treatment and Immobilization Plant - August 2011 August 2011 Hanford Waste Treatment and Immobilization Plant Construction Quality...

  17. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    October 2012 Independent Oversight Review, Waste Treatment and Immobilization Plant - October 2012 October 2012 Review of the Hanford Site Waste Treatment and Immobilization Plant...

  18. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    January 2013 Independent Oversight Review, Waste Treatment and Immobilization Plant - January 2013 January 2013 Review of the Hanford Waste Treatment and Immobilization Plant...

  19. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    May 2013 Independent Oversight Review, Waste Treatment and Immobilization Plant - May 2013 May 2013 Review of the Hanford Site Waste Treatment and Immobilization Plant Construction...

  20. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    August 2012 Independent Oversight Review, Waste Treatment and Immobilization Plant - August 2012 August 2012 Review of the Hanford Site Waste Treatment and Immobilization Plant...

  1. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    Project - October 2010 Independent Oversight Review, Waste Treatment and Immobilization Plant Project - October 2010 October 2010 Review of Nuclear Safety Culture at the Hanford...

  2. Independent Oversight Assessment, Waste Treatment and Immobilization...

    Office of Environmental Management (EM)

    Waste Treatment and Immobilization Plant - January 2012 Independent Oversight Assessment, Waste Treatment and Immobilization Plant - January 2012 January 2012 Assessment of the...

  3. Independent Oversight Review, Waste Treatment and Immobilization...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2015 Independent Oversight Activity Report, Hanford Waste Treatment and Immobilization Plant - October 2013 Waste Treatment and Immobilation Plant HLW Waste Vitrification Facility...

  4. Independent Oversight Assessment, Salt Waste Processing Facility...

    Broader source: Energy.gov (indexed) [DOE]

    Assessment of Nuclear Safety Culture at the Salt Waste Processing Facility Project The U.S. Department of Energy (DOE) Office of Enforcement and Oversight (Independent Oversight),...

  5. Independent Oversight Activity Report, Hanford Waste Treatment...

    Energy Savers [EERE]

    and Immobilization Plant Low Activity Waste Facility Heating, Ventilation, and Air Conditioning Systems Hazards Analysis Activities HIAR-WTP-2014-01-27 This Independent...

  6. Independent Oversight Activity Report, Nevada National Security...

    Energy Savers [EERE]

    an oversight activity conducted by the Office of Independent Enterprise Assessments (IEA), Office of Nuclear Safety and Environmental Assessments, from May 5-7, 2014. The...

  7. Independent Oversight Activity Report, National Nuclear Security...

    Broader source: Energy.gov (indexed) [DOE]

    an oversight activity conducted by the Office of Independent Enterprise Assessments (IEA), Office of Nuclear Safety and Environmental Assessments, from March 10-14, 2014. The...

  8. Independent Oversight Activity Report, Hanford Waste Treatment...

    Energy Savers [EERE]

    an oversight activity conducted by the Office of Independent Enterprise Assessments (IEA), Office of Environment, Safety and Health Assessments from March 31 - April 10, 2014,...

  9. Independent Oversight Activity Report, Hanford Waste Treatment...

    Energy Savers [EERE]

    an oversight activity conducted by the Office of Independent Enterprise Assessments' (IEA) Office of Nuclear Safety and Environmental Assessments from April 2-10, 2014, at the...

  10. Independent Oversight Inspection, Pantex Plant - August 2005...

    Energy Savers [EERE]

    August 2005 Independent Oversight Inspection, Pantex Plant - August 2005 August 2005 Inspection of Emergency Management at the Pantex Site Office and the Pantex Plant This report...

  11. Independent Oversight Review, Rocky Flats Environmental Technology...

    Energy Savers [EERE]

    Rocky Flats Environmental Technology Site - March 2000 Independent Oversight Review, Rocky Flats Environmental Technology Site - March 2000 March 2000 Review of the Rocky Flats...

  12. Independent Oversight Review, Los Alamos National Laboratory...

    Energy Savers [EERE]

    Research Facility - January 2012 Independent Oversight Review, Los Alamos National Laboratory Chemistry and Metallurgy Research Facility - January 2012 January 2012 Review...

  13. Independent Oversight Review, Los Alamos National Laboratory...

    Energy Savers [EERE]

    Los Alamos National Laboratory - January 2013 Independent Oversight Review, Los Alamos National Laboratory Chemistry and Metallurgy Research Facility - January 2012 Waste...

  14. Independent Oversight Assessment, Portsmouth/Paducah Project...

    Office of Environmental Management (EM)

    Office of Health, Safety and Security. The Independent Oversight assessment focused on project office's oversight of the identification, evaluation, analysis, transmittal, and...

  15. Guide to good practices for independent verification

    SciTech Connect (OSTI)

    NONE

    1998-12-01

    This Guide to Good Practices is written to enhance understanding of, and provide direction for, Independent Verification, Chapter X of Department of Energy (DOE) Order 5480.19, Conduct of Operations Requirements for DOE Facilities. The practices in this guide should be considered when planning or reviewing independent verification activities. Contractors are advised to adopt procedures that meet the intent of DOE Order 5480.19. Independent Verification is an element of an effective Conduct of Operations program. The complexity and array of activities performed in DOE facilities dictate the necessity for coordinated independent verification activities to promote safe and efficient operations.

  16. Independent Oversight Activity Report, Pacific Northwest National...

    Energy Savers [EERE]

    Activity Report, Pacific Northwest National Laboratory - January 2014 Independent Oversight Activity Report, Pacific Northwest National Laboratory - January 2014 February 2014 PNNL...

  17. Independent Oversight Inspection, Oak Ridge National Laboratory...

    Energy Savers [EERE]

    Inspection, Oak Ridge National Laboratory - October 2008 Independent Oversight Inspection, Oak Ridge National Laboratory - October 2008 October 2008 Inspection of Nuclear Safety at...

  18. Independent Oversight Review, Advanced Mixed Waste Treatment...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Advanced Mixed Waste Treatment Project - April 2013 Independent Oversight Review, Advanced Mixed Waste Treatment Project - April 2013 April 2013 Review of Radiation Protection...

  19. Independent Oversight Review, Los Alamos National Laboratory...

    Broader source: Energy.gov (indexed) [DOE]

    April 2012 Review of the Emergency Response Organization at the Los Alamos National Laboratory This report provides the results of an independent review of the Los Alamos National...

  20. Independent Oversight Review, Argonne National Laboratory - November...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Argonne National Laboratory - November 2011 Independent Oversight Review, Argonne National Laboratory - November 2011 November 2011 Review of the Argonne National Laboratory...

  1. Independent Oversight Review, Portsmouth Gaseous Diffusion Plant...

    Office of Environmental Management (EM)

    April 2013 Independent Oversight Review, Portsmouth Gaseous Diffusion Plant - April 2013 April 2013 Review of the Integrated Safety Management System Phase I Verification Review at...

  2. Independent Oversight Review, Lawrence Livermore National Laboratory...

    Office of Environmental Management (EM)

    Lawrence Livermore National Laboratory - July 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 July 2013 Review of Preparedness for Severe...

  3. Independent Oversight Review, Los Alamos National Laboratory...

    Energy Savers [EERE]

    Los Alamos National Laboratory - April 2012 Independent Oversight Review, Los Alamos National Laboratory - April 2012 April 2012 Review of the Consequence Assessment Program at the...

  4. Independent Oversight Review, Savannah River Operations Office...

    Office of Environmental Management (EM)

    Savannah River Operations Office - July 2013 Independent Oversight Review, Savannah River Operations Office - July 2013 July 2013 Review of the Employee Concerns Program at the...

  5. Independent Oversight Review, Oak Ridge National Laboratory ...

    Energy Savers [EERE]

    Review, Oak Ridge National Laboratory - January 2013 Independent Oversight Review, Oak Ridge National Laboratory - January 2013 January 2013 Review of the Oak Ridge National...

  6. Independent Oversight Review, Lawrence Livermore National Laboratory...

    Broader source: Energy.gov (indexed) [DOE]

    September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory This report documents the results of an independent oversight review of the fire...

  7. Independent Oversight Review, Pacific Northwest National Laboratory...

    Energy Savers [EERE]

    September 2013 Independent Oversight Review, Pacific Northwest National Laboratory - September 2013 September 2013 Review of the Fire Protection Program at Pacific Northwest...

  8. Independent Oversight Review, Pacific Northwest National Laboratory...

    Energy Savers [EERE]

    October 2012 Independent Oversight Review, Pacific Northwest National Laboratory - October 2012 October 2012 Review of the Department of Energy Office of Science Assessment of the...

  9. Independent Oversight Review, Los Alamos National Laboratory...

    Energy Savers [EERE]

    September 2011 Independent Oversight Review, Los Alamos National Laboratory - September 2011 September 2011 Review of the Facility Centered Assessment of the Los Alamos National...

  10. Independent Activity Report, Hanford Plutonium Finishing Plant...

    Broader source: Energy.gov (indexed) [DOE]

    May 2012 Criticality Safety Information Meeting for the Hanford Plutonium Finishing Plant HIAR-RL-2012-05-14 This Independent Activity Report documents an oversight activity...

  11. Independent Oversight Activity Report, Nevada National Security...

    Broader source: Energy.gov (indexed) [DOE]

    2014 Operational Awareness Oversight of the Nevada National Security Site HIAR NNSS-2014-03-03 This Independent Activity Report documents an oversight activity conducted by the...

  12. Independent Activity Report, Nevada National Security Site -...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    December 2012 Independent Activity Report, Nevada National Security Site - December 2012 December 2012 Nevada National Security Site Operational Awareness Visit HIAR...

  13. Independent Oversight Review, Portsmouth Gaseous Diffusion Plant...

    Office of Environmental Management (EM)

    January 2013 Independent Oversight Review, Portsmouth Gaseous Diffusion Plant - January 2013 January 2013 Review of the Portsmouth Gaseous Diffusion Plant Work Planning and Control...

  14. Independent Activity Report, Portsmouth Gaseous Diffusion Plant...

    Office of Environmental Management (EM)

    Portsmouth Gaseous Diffusion Plant - August 2011 Independent Activity Report, Portsmouth Gaseous Diffusion Plant - August 2011 August 2011 Orientation Visit to the Portsmouth...

  15. Independent Oversight Review, Los Alamos National Laboratory...

    Energy Savers [EERE]

    Review, Los Alamos National Laboratory - September 2011 Independent Oversight Review, Los Alamos National Laboratory Chemistry and Metallurgy Research Facility - January 2012...

  16. Independent Oversight Review, Portsmouth Gaseous Diffusion Plant...

    Broader source: Energy.gov (indexed) [DOE]

    Review, Paducah Site - April 2013 Independent Oversight Review, Hanford Site - September 2013 Enterprise Assessments Review, West Valley Demonstration Project - December 2014...

  17. Independent Activity Report, West Valley Demonstration Project...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    West Valley Demonstration Project - July 2012 Independent Activity Report, West Valley Demonstration Project - July 2012 July 2012 Operational Awareness Oversight of the West...

  18. Independent Oversight Activity Report, Hanford Sludge Treatment...

    Energy Savers [EERE]

    Activity Report, Hanford Sludge Treatment Project - September 2013 Independent Oversight Activity Report, Hanford Sludge Treatment Project - September 2013 November 2013 Hanford...

  19. Independent Activity Report, Richland Operations Office - August...

    Office of Environmental Management (EM)

    Activity Report, Richland Operations Office - August 2011 August 2011 Hanford Sludge Treatment Project HIAR-RL-2011-08-25 This Independent Activity Report documents an...

  20. Independent Oversight Review, Waste Treatment and Immobilization...

    Broader source: Energy.gov (indexed) [DOE]

    November 2011 Review of the Hanford Site Waste Treatment and Immobilization Plant Project Construction Quality This report documents the results of an independent oversight review...

  1. Independent Activity Report, Defense Nuclear Facilities Safety...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Defense Nuclear Facilities Safety Board Public Meeting - October 2012 Independent Activity Report, Defense Nuclear Facilities Safety Board Public Meeting - October 2012 October...

  2. Space-charge waves in magnetized and collisional quantum plasma columns confined in carbon nanotubes

    SciTech Connect (OSTI)

    Bagheri, Mehran; Abdikian, Alireza

    2014-04-15

    We study the dispersion relation of electrostatic waves propagating in a column of quantum magnetized collisional plasma embraced completely by a metallic single-walled carbon nanotubes. The analysis is based on the quantum linearized hydrodynamic formalism of collective excitations within the quasi-static approximation. It is shown when the electronic de Broglie's wavelength of the plasma is comparable in the order of magnitude to the radius of the nanotube, the quantum effects are quite meaningful and our model anticipates one acoustical and two optical space-charge waves which are positioned into three propagating bands. With increasing the nanotube radius, the features of the acoustical branch remain unchanged, yet two distinct optical branches are degenerated and the classical behavior is recovered. This study might provide a platform to create new finite transverse cross section quantum magnetized plasmas and to devise nanometer dusty plasmas based on the metallic carbon nanotubes in the absence of either a drift or a thermal electronic velocity and their existence could be experimentally examined.

  3. Wave-mechanics and the adhesion approximation

    E-Print Network [OSTI]

    C. J. Short; P. Coles

    2006-11-22

    The dynamical equations describing the evolution of a self-gravitating fluid of cold dark matter (CDM) can be written in the form of a Schrodinger equation coupled to a Poisson equation describing Newtonian gravity. It has recently been shown that, in the quasi-linear regime, the Schrodinger equation can be reduced to the exactly solvable free-particle Schrodinger equation. The free-particle Schrodinger equation forms the basis of a new approximation scheme -the free-particle approximation - that is capable of evolving cosmological density perturbations into the quasi-linear regime. The free-particle approximation is essentially an alternative to the adhesion model in which the artificial viscosity term in Burgers' equation is replaced by a non-linear term known as the quantum pressure. Simple one-dimensional tests of the free-particle method have yielded encouraging results. In this paper we comprehensively test the free-particle approximation in a more cosmologically relevant scenario by appealing to an N-body simulation. We compare our results with those obtained from two established methods: the linearized fluid approach and the Zeldovich approximation. We find that the free-particle approximation comprehensively out-performs both of these approximation schemes in all tests carried out and thus provides another useful analytical tool for studying structure formation on cosmological scales.

  4. Accuracy of Nonlinear Approximations in Spheroidal Collapse --- Why are Zel'dovich-type approximations so good? ---

    E-Print Network [OSTI]

    Ayako Yoshisato; Takahiko Matsubara; Masahiro Morikawa

    1997-08-11

    Among various analytic approximations for the growth of density fluctuations in the expanding Universe, Zel'dovich approximation and its extensions in Lagrangian scheme are known to be accurate even in mildly non-linear regime. The aim of this paper is to investigate the reason why these Zel'dovich-type approximations work accurately beyond the linear regime from the following two points of view: (1) Dimensionality of the system and (2) the Lagrangian scheme on which the Zel'dovich approximation is grounded. In order to examine the dimensionality, we introduce a model with spheroidal mass distribution. In order to examine the Lagrangian scheme, we introduce the Pad\\'e approximation in Eulerian scheme. We clarify which of these aspects supports the unusual accuracy of the Zel'dovich-type approximations. We also give an implication for more accurate approximation method beyond the Zel'dovich-type approximations.

  5. Reduced Operator Approximation for Modelling Open Quantum Systems

    E-Print Network [OSTI]

    Agnieszka Werpachowska

    2015-08-05

    We present the Reduced Operator Approximation: a simple, physically transparent and computationally efficient method of modelling open quantum systems. It employs the Heisenberg picture of the quantum dynamics, which allows us to focus on the system degrees of freedom in a natural and easy way. We describe different variants of the method, low- and high-order in the system-bath interaction operators, defining them for either general quantum harmonic oscillator baths or specialising them for independent baths with Lorentzian spectral densities. Its wide applicability is demonstrated on the examples of systems coupled to different baths (with varying system-bath interaction strength and bath memory length), and compared with the exact pseudomode and the popular quantum state diffusion approach. The method captures the decoherence of the system interacting with the bath, while conserving the total energy. Our results suggest that quantum coherence effects persist in open quantum systems for much longer times than previously thought.

  6. Engineering Development of Slurry Bubble Column Reactor (SBCR) Technology

    SciTech Connect (OSTI)

    Puneet Gupta

    2002-07-31

    This report summarizes the procedures used and results obtained in determining radial gas holdup profiles, via gamma ray scanning, and in assessing liquid and gas mixing parameters, via radioactive liquid and gas tracers, during Fischer Tropsch synthesis. The objectives of the study were (i) to develop a procedure for detection of gas holdup radial profiles in operating reactors and (ii) to test the ability of the developed, previously described, engineering models to predict the observed liquid and gas mixing patterns. It was shown that the current scanning procedures were not precise enough to obtain an accurate estimate of the gas radial holdup profile and an improved protocol for future use was developed. The previously developed physically based model for liquid mixing was adapted to account for liquid withdrawal from the mid section of the column. The ability of our engineering mixing models for liquid and gas phase to predict both liquid and gas phase tracer response was established and illustrated.

  7. Impact of flow regime on slurry bubble column mixing

    SciTech Connect (OSTI)

    Chang, M.; Hsu, E.C.; Coulaloglou, C.A. [Exxon Research and Engineering Company, Florham Park, NJ (United States)

    1993-12-31

    In slurry bubble column reactors, gas and slurry backmixing play an important role in the performance of the reactor. The majority of backmixing correlations in the literature were based on data obtained in small scale units operating at ambient conditions with air/water and in the churn turbulent flow regime. These data show that slurry dispersion coefficients increase at least linearly with vessel diameter. Mixing data obtained at process conditions and in large mockup units with non-aqueous systems operating in the small bubble flow regime showed that slurry mixing is lower than predicted by literature correlations. Furthermore, the effect of vessel diameter on slurry mixing is significantly smaller than literature predictions based on the churn turbulent regime. These results are in line with recently reported literature data obtained in bubbly flow regime. This paper will review available data pertinent to this subject.

  8. Safeguards and Security Independent Oversight Program

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1998-12-23

    Establishes the DOE Safeguards and Security Independent Oversight Program that provides DOE and contractor managers, Congress, and other stakeholders with an independent evaluation of the effectiveness of DOE safeguards and security policy and programs, and the implementation of those policies and programs. Cancels DOE 5630.12A.

  9. Method for making a non-extractable stationary phase of polymer within a capillary column

    DOE Patents [OSTI]

    Springston, S.R.

    1990-10-30

    A method is described for coating interior capillary column surfaces, or packing material of a packed column, used for gas chromatography, with a stationary polymer phase that is cross-linked by exposing it to a low-temperature plasma that is uniformly distributed over the column or packing material for a predetermined period of time to effect the desired degree of cross-linking of the coating. 7 figs.

  10. Harmonic Wavelet Transform and Image Approximation

    E-Print Network [OSTI]

    Zhang, Zhihua; Saito, Naoki

    2010-01-01

    DOI 10.1007/s10851-010-0202-x Harmonic Wavelet Transform andwe approximate f by a harmonic function u such that thebanks. We call this the Harmonic Wavelet Transform (HWT).

  11. Approximate inference in Gaussian graphical models

    E-Print Network [OSTI]

    Malioutov, Dmitry M., 1981-

    2008-01-01

    The focus of this thesis is approximate inference in Gaussian graphical models. A graphical model is a family of probability distributions in which the structure of interactions among the random variables is captured by a ...

  12. A fresh look at the adhesion approximation

    E-Print Network [OSTI]

    Thomas Buchert

    1997-11-04

    I report on a systematic derivation of the phenomenological ``adhesion approximation'' from gravitational instability together with a brief evaluation of the related status of analytical modeling of large-scale structure.

  13. Energy-efficient approximate computation in Topaz

    E-Print Network [OSTI]

    Achour, Sara

    2015-01-01

    The increasing prominence of energy consumption as a first-order concern in contemporary computing systems has motivated the design of energy-efficient approximate computing platforms. These computing platforms feature ...

  14. Updated: June 21, 2010 Diophantine approximation,

    E-Print Network [OSTI]

    Waldschmidt, Michel

    Updated: June 21, 2010 Diophantine approximation, irrationality and transcendence Michel] Chap. 3. See also [1] Chap. III. References [1] S. Lang, Introduction to transcendental numbers transcendants, Springer-Verlag, Berlin, 1974. Lecture Notes in Mathematics, Vol. 402. http

  15. Optimization in Geometric Graphs: Complexity and Approximation 

    E-Print Network [OSTI]

    Kahruman-Anderoglu, Sera

    2011-02-22

    We consider several related problems arising in geometric graphs. In particular, we investigate the computational complexity and approximability properties of several optimization problems in unit ball graphs and develop ...

  16. Signal approximation using the bilinear transform

    E-Print Network [OSTI]

    Venkataraman, Archana, Ph. D. Massachusetts Institute of Technology

    2007-01-01

    This thesis explores the approximation properties of a unique basis expansion. The expansion implements a nonlinear frequency warping between a continuous-time signal and its discrete-time representation according to the ...

  17. Polymer state approximations of Schroedinger wave functions

    E-Print Network [OSTI]

    Klaus Fredenhagen; Felix Reszewski

    2006-08-25

    It is shown how states of a quantum mechanical particle in the Schroedinger representation can be approximated by states in the so-called polymer representation. The result may shed some light on the semiclassical limit of loop quantum gravity.

  18. The Contribution of Environmental Siting and Permitting Requirements to the Cost of Energy for Oscillating Water Column Wave Energy Devices

    SciTech Connect (OSTI)

    Copping, Andrea E.; Geerlofs, Simon H.; Hanna, Luke A.

    2013-09-30

    Responsible deployment of marine and hydrokinetic (MHK) devices in estuaries, coastal areas, and major rivers requires that biological resources and ecosystems be protected through siting and permitting (consenting) processes. Scoping appropriate deployment locations, collecting pre-installation (baseline) and post-installation data all add to the cost of developing MHK projects, and hence to the cost of energy. Under the direction of the U.S. Department of Energy, Pacific Northwest National Laboratory scientists have developed logic models that describe studies and processes for environmental siting and permitting. Each study and environmental permitting process has been assigned a cost derived from existing and proposed tidal, wave, and riverine MHK projects, as well as expert opinion of marine environmental research professionals. Cost estimates have been developed at the pilot and commercial scale. The reference model described in this document is an oscillating water column device deployed in Northern California at approximately 50 meters water depth.

  19. Solving Parallel Machine Scheduling Problems by Column Generation

    E-Print Network [OSTI]

    Powell, Warren B.

    and bound #12;1 Introduction We consider a class of problems of scheduling n independent jobs N = f1;2;:::;ng on m identical, uniform, or unrelated parallel machines M = f1;2;:::;mg with an objective of Systems Engineering University of Pennsylvania Philadelphia, PA 19104-6315 Warren B. Powell Department

  20. An improved proximity force approximation for electrostatics

    SciTech Connect (OSTI)

    Fosco, Cesar D.; Instituto Balseiro, Universidad Nacional de Cuyo, R8402AGP Bariloche ; Lombardo, Fernando C.; IFIBA ; Mazzitelli, Francisco D.

    2012-08-15

    A quite straightforward approximation for the electrostatic interaction between two perfectly conducting surfaces suggests itself when the distance between them is much smaller than the characteristic lengths associated with their shapes. Indeed, in the so called 'proximity force approximation' the electrostatic force is evaluated by first dividing each surface into a set of small flat patches, and then adding up the forces due two opposite pairs, the contributions of which are approximated as due to pairs of parallel planes. This approximation has been widely and successfully applied in different contexts, ranging from nuclear physics to Casimir effect calculations. We present here an improvement on this approximation, based on a derivative expansion for the electrostatic energy contained between the surfaces. The results obtained could be useful for discussing the geometric dependence of the electrostatic force, and also as a convenient benchmark for numerical analyses of the tip-sample electrostatic interaction in atomic force microscopes. - Highlights: Black-Right-Pointing-Pointer The proximity force approximation (PFA) has been widely used in different areas. Black-Right-Pointing-Pointer The PFA can be improved using a derivative expansion in the shape of the surfaces. Black-Right-Pointing-Pointer We use the improved PFA to compute electrostatic forces between conductors. Black-Right-Pointing-Pointer The results can be used as an analytic benchmark for numerical calculations in AFM. Black-Right-Pointing-Pointer Insight is provided for people who use the PFA to compute nuclear and Casimir forces.

  1. PULSE COLUMN DESIGN By Lawrence E. Burkhart R.W. Fahien

    Office of Scientific and Technical Information (OSTI)

    PULSE COLUMN DESIGN By Lawrence E. Burkhart R.W. Fahien November 1958 Ames Laboratory Iowa State College Ames, Iowa UNITED STATES ATOMIC ENERGY COMMISSION Technical Information...

  2. Experimental Evaluation of Beam to Diamond Box Column Connection with Through Plate in Moment Frames

    SciTech Connect (OSTI)

    Keshavarzi, Farhad; Torabian, Shahabeddin; Imanpour, Ali; Mirghaderi, Rasoul

    2008-07-08

    Moment resisting frames with built up section have very enhanced features due to high bending stiffness and strength characteristics in two principal axes and access to column faces for beam to column easy connections. But due to proper transfer of beam stresses to column faces there were always some specific controvertibly issues that how to make the load transfer through and in plane manner in order to mobilize the forces in column faces. Using diamond column instead of box column provide possibility to mobilize the load transfer mechanism in column faces. This section as a column has considerable benefit such as high plastic to elastic section modulus ratio which is an effective factor for force controlled components. Typical connection has no chance to be applied with diamond column.This paper elucidates the seismic behavior of through-plates moment connections to diamond box columns for use in steel moment resisting frames. This connection has a lot of economical benefits such as no need to horizontal continuity plates and satisfying the weak beam--strong column criteria in the connection region. They might serve as panel zone plates as well. According to high shear demand in panel zone of beam to column joint one should use the doublers plates in order to decrease the shear strength demand in this sensitive part of structure but these plates have no possibility to mobilize the load transfer mechanism in column web and transfer them to column flanges. In this type of connection, column faces have effective role in order to decrease the demands on through plate and they are impressive factors for improving the performance of the connection.Experimental analysis was conducted to elucidate the seismic behavior of this connection. The results of Experimental analysis established the effectiveness of the through plate in mitigating local stress concentrations and forming the plastic hinge zone in the beam away from the beam to column interface. The moment-rotation graphs form sub-assemblage show a desirable seismic performance of this connection.

  3. Improved Design Tools for Surface Water and Standing Column Well Heat Pump Systems

    Broader source: Energy.gov [DOE]

    This project will improve the capability of engineers to design heat pump systems that utilize surface water or standing column wells (SCW) as their heat sources and sinks.

  4. Top-down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns

    E-Print Network [OSTI]

    2013-01-01

    of uncer- tainty in formaldehyde air-mass factors overof tropospheric formaldehyde retrieved from spaceborne nadirNorth America using formaldehyde column observations from

  5. Global emissions of non-methane hydrocarbons deduced from SCIAMACHY formaldehyde columns through 2003-2006

    E-Print Network [OSTI]

    Stavrakou, AD

    2009-01-01

    and Clarke, A. D. : Formaldehyde distribu- tion over Northsatellite retrievals of formaldehyde columns and isopreneTemperature-dependent formaldehyde cross sections in the

  6. Seismic Assessment and Retrofit of Existing Multi-Column Bent Bridges

    E-Print Network [OSTI]

    Seismic Assessment and Retrofit of Existing Multi-Column Bent Bridges By Cole C. Mc ................................................................................................................................... 6 Seismic Activity in Western Washington State Approach ­ Bridge Modeling .............................................11 Seismic Excitations

  7. Targeted Technology Transfer to US Independents

    SciTech Connect (OSTI)

    Schatzinger, Viola; Chapman, Kathy; Lovendahl, Kristi

    2014-09-30

    The Petroleum Technology Transfer Council (PTTC) is a unique not-for-profit network that focuses on transferring Exploration and Production (E&P) technology to the domestic oil and natural gas producing industry. PTTC connects producers, technology providers and innovators, academia, research and development (R&D) consortiums and governments. Local affordable workshops delivered by Regional Lead Organizations (RLOs), which are typically a university or geological survey, are a primary tool. PTTC also maintains a website network, issues a national newsletter, provides a column in a major trade publication, and exhibits at major industry events. It also encourages industry to ask technology-related questions, striving to find relevant answers that will save questioners significant time. Working since late 1993, the PTTC network has a proven track record of providing industry with technology insights they can apply. Volunteers at the regional and national level provide key guidance regarding where to focus technical effort and help connect PTTC with industry. At historical funding levels, PTTC had been able to hold well more than 100 workshops per year, drawing 6,000+ attendees. As funding decreased in the early 2000s, the level of activity decreased and PTTC sought a merger with the American Association of Petroleum Geologists (AAPG), becoming an AAPG-managed organization at the start of FY08. This relationship with AAPG was terminated by mutual consent in May 2011 and PTTC once again operates independently. Chris Hall, California continued to serve as Chairman of the Board of Directors until December 2013. At the time PTTC reorganized into a RLO led organization with Mary Carr and Jeremy Viscomi as co-Executive Directors. Jerry Anderson became the Chairman of the PTTC Board of Directors and Chris Hall continues to serve on the Board. Workshop activity stabilized at 55-65 workshops per year averaging 3,100 attendees. FY14 represented the fifth year in a multi-year contract with the Department of Energy (DOE) for providing technology transfer services. This report summarizes activity and results during for five years, FY10 through FY14. In FY12 changes occurred in responsibilities of consultants serving HQ, because funding was reduced below the threshold level of $500,000 audits were no longer required and consultant time was reduced on the primary contract. Contracts for Permian Carbon Capture Utilization and Storage (CCUS) training, and providing tech transfer services to the Research Partnership to Secure Energy for America (RPSEA) provided work that enabled HQ to retain services of regular consultants. Both CCUS and RPSEA were five year contracts with PTTC, and providing services for these DOE funded contracts provided synergy for PTTC and the oil and gas industry. With further decreases in DOE funding the regions conducted workshops with no PTTC funding starting in June FY11. Since 2011 the number of workshops has declined from 79 in FY10 and FY11 to 49 in FY12, and risen to 54 in FY13 and 63 in FY14. The attendee's numbers dipped slightly below 3,000 per year in FY 10, FY12, and FY13, but rose to over 3,800 in FY 11 and 3105 in FY14. Quantitative accomplishments: PTTC has maintained its unique structure of a national organization working through Regional Lead Organizations (RLOs) to deliver local, affordable workshops. During the contract period PTTC consolidated from 10 to five regions to increase efficiency, and because no active RLO's would be maintained in the Central and Eastern Gulf Coast regions. RLO's for the regions are located at: Eastern - West Virginia University, (Illinois Geol. Survey., W. Michigan Univ. FY10-12); Midwest created in FY13 - Illinois Geological Survey, W. Michigan University; Midcontinent - University of Kansas, expanded to Houston, TX (2013-14); Rocky Mountain - Colorado School of Mines; Texas/SE New Mexico (FY10-FY11) - Bureau of Economic Geology, Univ. of Texas at Austin; West Coast - Conservation Committee of California O&G Producers.

  8. An RF dosimeter for independent SAR measurement in MRI scanners

    SciTech Connect (OSTI)

    Qian, Di; Bottomley, Paul A.; El-Sharkawy, AbdEl-Monem M.; Edelstein, William A.

    2013-12-15

    Purpose: The monitoring and management of radio frequency (RF) exposure is critical for ensuring magnetic resonance imaging (MRI) safety. Commercial MRI scanners can overestimate specific absorption rates (SAR) and improperly restrict clinical MRI scans or the application of new MRI sequences, while underestimation of SAR can lead to tissue heating and thermal injury. Accurate scanner-independent RF dosimetry is essential for measuring actual exposure when SAR is critical for ensuring regulatory compliance and MRI safety, for establishing RF exposure while evaluating interventional leads and devices, and for routine MRI quality assessment by medical physicists. However, at present there are no scanner-independent SAR dosimeters. Methods: An SAR dosimeter with an RF transducer comprises two orthogonal, rectangular copper loops and a spherical MRI phantom. The transducer is placed in the magnet bore and calibrated to approximate the resistive loading of the scanner's whole-body birdcage RF coil for human subjects in Philips, GE and Siemens 3 tesla (3T) MRI scanners. The transducer loop reactances are adjusted to minimize interference with the transmit RF field (B{sub 1}) at the MRI frequency. Power from the RF transducer is sampled with a high dynamic range power monitor and recorded on a computer. The deposited power is calibrated and tested on eight different MRI scanners. Whole-body absorbed power vs weight and body mass index (BMI) is measured directly on 26 subjects. Results: A single linear calibration curve sufficed for RF dosimetry at 127.8 MHz on three different Philips and three GE 3T MRI scanners. An RF dosimeter operating at 123.2 MHz on two Siemens 3T scanners required a separate transducer and a slightly different calibration curve. Measurement accuracy was ?3%. With the torso landmarked at the xiphoid, human adult whole?body absorbed power varied approximately linearly with patient weight and BMI. This indicates that whole-body torso SAR is on average independent of the imaging subject, albeit with fluctuations. Conclusions: Our 3T RF dosimeter and transducers accurately measure RF exposure in body-equivalent loads and provide scanner-independent assessments of whole-body RF power deposition for establishing safety compliance useful for MRI sequence and device testing.

  9. DUST EXTINCTION BIAS IN THE COLUMN DENSITY DISTRIBUTION OF GAMMA-RAY BURSTS: HIGH COLUMN DENSITY, LOW-REDSHIFT GRBs ARE MORE HEAVILY OBSCURED

    SciTech Connect (OSTI)

    Watson, Darach [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen O (Denmark); Jakobsson, Pall, E-mail: darach@dark-cosmology.dk, E-mail: pja@raunvis.hi.is [Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhaga 5, IS-107 Reykjavik (Iceland)

    2012-08-01

    The afterglows of gamma-ray bursts (GRBs) have more soft-X-ray absorption than expected from the foreground gas column in the Galaxy. While the redshift of the absorption can in general not be constrained from current X-ray observations, it has been assumed that the absorption is due to metals in the host galaxy of the GRB. The large sample of X-ray afterglows and redshifts now available allows the construction of statistically meaningful distributions of the metal column densities. We construct such a sample and show, as found in previous studies, that the typical absorbing column density (N{sub H{sub X}}) increases substantially with redshift, with few high column density objects found at low-to-moderate redshifts. We show, however, that when highly extinguished bursts are included in the sample, using redshifts from their host galaxies, high column density sources are also found at low-to-moderate redshift. We infer from individual objects in the sample and from observations of blazars that the increase in column density with redshift is unlikely to be related to metals in the intergalactic medium or intervening absorbers. Instead we show that the origin of the apparent increase with redshift is primarily due to dust extinction bias: GRBs with high X-ray absorption column densities found at z {approx}< 4 typically have very high dust extinction column densities, while those found at the highest redshifts do not. It is unclear how such a strongly evolving N{sub H{sub X}}/A{sub V} ratio would arise, and based on current data, remains a puzzle.

  10. Independent Oversight Review, Oak Ridge Transuranic Waste Processing...

    Energy Savers [EERE]

    Independent Oversight Review, Oak Ridge Transuranic Waste Processing Facility - December 2013 Independent Oversight Review, Oak Ridge Transuranic Waste Processing Facility -...

  11. Aerosol specification in single-column CAM5

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lebassi-Habtezion, B.; Caldwell, P.

    2014-11-17

    The ability to run a global climate model in single-column mode is very useful for testing model improvements because single-column models (SCMs) are inexpensive to run and easy to interpret. A major breakthrough in Version 5 of the Community Atmosphere Model (CAM5) is the inclusion of prognostic aerosol. Unfortunately, this improvement was not coordinated with the SCM version of CAM5 and as a result CAM5-SCM initializes aerosols to zero. In this study we explore the impact of running CAM5-SCM with aerosol initialized to zero (hereafter named Default) and test three potential fixes. The first fix is to use CAM5'smore »prescribed aerosol capability, which specifies aerosols at monthly climatological values. The second method is to prescribe aerosols at observed values. The third approach is to fix droplet and ice crystal numbers at prescribed values. We test our fixes in four different cloud regimes to ensure representativeness: subtropical drizzling stratocumulus (based on the DYCOMS RF02 case study), mixed-phase Arctic stratocumulus (using the MPACE-B case study), tropical shallow convection (using the RICO case study), and summertime mid-latitude continental convection (using the ARM95 case study). Stratiform cloud cases (DYCOMS RF02 and MPACE-B) were found to have a strong dependence on aerosol concentration, while convective cases (RICO and ARM95) were relatively insensitive to aerosol specification. This is perhaps expected because convective schemes in CAM5 do not currently use aerosol information. Adequate liquid water content in the MPACE-B case was only maintained when ice crystal number concentration was specified because the Meyers et al. (1992) deposition/condensation ice nucleation scheme used by CAM5 greatly overpredicts ice nucleation rates, causing clouds to rapidly glaciate. Surprisingly, predicted droplet concentrations for the ARM95 region in both SCM and global runs were around 25 cm?3, which is much lower than observed. This finding suggests that CAM5 has problems capturing aerosol effects in this climate regime.« less

  12. Online independent film distribution : what is missing?

    E-Print Network [OSTI]

    AbouZeid, Perihan

    2015-01-01

    This thesis proposes a new model for online platforms for independent films. Today, platforms such as Netflix, iTunes, and YouTube are in the face of major industry challenges: more competitors are entering the market; ...

  13. Behavior of Reinforced Concrete ColumnSteel Beam Roof Level T-Connections under Displacement Reversals

    E-Print Network [OSTI]

    Parra-Montesinos, Gustavo J.

    Behavior of Reinforced Concrete Column­Steel Beam Roof Level T-Connections under Displacement study on the seismic response of two hybrid RC column-to-steel S beam RCS roof level T longitudinal bars; and 2 confinement requirements in RCS roof level T-connections. In the first subassembly

  14. Journal of Fluids and Structures 22 (2006) 135171 Water hammer with column separation: A historical review

    E-Print Network [OSTI]

    Tijsseling, A.S.

    2006-01-01

    Available online 13 October 2005 Abstract Column separation refers to the breaking of liquid columns. Gaseous cavitation and steam condensation are beyond the scope of the paper. r 2005 Elsevier Ltd. All vaporous cavitation model HGL hydraulic grade line MOC method of characteristics Scalars A cross

  15. Dynamic Column Extraction for Europium on Media #1 at Ambient Temperature

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Gary Garland

    2015-04-07

    This is a dataset for a 200ppm europium solution sent through a column with 12g of media #1 at pH of 3.2. This column experiment was run at ambient temperature at a flow rate of 2mL/min.

  16. MODELING OF STANDING COLUMN WELLS IN GROUND SOURCE HEAT PUMP SYSTEMS

    E-Print Network [OSTI]

    MODELING OF STANDING COLUMN WELLS IN GROUND SOURCE HEAT PUMP SYSTEMS By ZHENG DENG Bachelor December, 2004 #12;ii MODELING OF STANDING COLUMN WELLS IN GROUND SOURCE HEAT PUMP SYSTEMS Thesis Approved) ..................................................................... 6 1.3. Basic physical mechanism in SCWs (heat transfer and mass transfer in porous media

  17. Chromate transport through columns packed with surfactant-modified zeolite/zero valent iron pellets

    E-Print Network [OSTI]

    Li, Zhaohui

    Chromate transport through columns packed with surfactant-modified zeolite/zero valent iron pellets Chromate transport through columns packed with zeolite/zero valent iron (Z/ZVI) pellets, either untreated originated from chromate sorption onto the HDTMA modified Z/ZVI pellets. Due to dual porosity, the presence

  18. Optimal Allocation of Heat Exchanger Inventory in a Serial Type Diabatic Distillation Column

    E-Print Network [OSTI]

    Salamon, Peter

    Optimal Allocation of Heat Exchanger Inventory in a Serial Type Diabatic Distillation Column Edward the column . We have previously shown (Jimenez et al. 2003) that optimaloperation of serial heat exchangers total heat exchanger area in different trays and calculate the optimal allocation of a given heat

  19. TECHNICAL ADVANCES A rapid column-based ancient DNA extraction method for

    E-Print Network [OSTI]

    Reich, David

    TECHNICAL ADVANCES A rapid column-based ancient DNA extraction method for increased sample-quality samples. Therefore, a DNA extraction method that optimizes DNA yields from low-quality samples in the extraction of sam- ples, as column-based methods using commercial kits are fast but have proven to give very

  20. Minimum Energy Consumption in Multicomponent Distillation. 1. Vmin Diagram for a Two-Product Column

    E-Print Network [OSTI]

    Skogestad, Sigurd

    of Science and Technology, N-7491 Trondheim, Norway The Vmin diagram is introduced to effectively visualize derivation of the Vmin diagram was based on computing pinch zone compositions for columns with an infinite 215 and 316 of this series. The behavior of composition profiles and pinch zones in a column and how

  1. Influence of increased gas density on hydrodynamics of bubble-column reactors

    SciTech Connect (OSTI)

    Krishna, R.; Swart, J.W.A. de; Hennephof, D.E.; Ellenberger, J.; Hoefsloot, H.C.J. (Univ. of Amsterdam (Netherlands). Dept. of Chemical Engineering)

    1994-01-01

    A mechanistic background to the understanding of the hydrodynamics of high-pressure bubble column reactors in both the homogeneous and heterogeneous flow regimes is discussed. An important parameter determining the stability of homogeneous bubbly flow in a bubble column is shown to be the Richardson-Zaki exponent in the bubble swarm velocity relationship V[sub swarm] = [upsilon][sub [infinity

  2. The production and degradation of trichloroacetic acid in soil: results from in situ soil column experiments 

    E-Print Network [OSTI]

    Heal, Mathew R; Dickey, Catherine A; Heal, Kate V; Stidson, Ruth T; Matucha, Miroslav; Cape, J Neil

    2010-01-01

    experiments with radioactively-labelled TCA and with irradiated (sterilised) soil columns. Control in situ forest soil columns showed evidence of net export (i.e. in situ production) of TCA, consistent with a net soil TCA production inferred from forest...

  3. Using observations of deep convective systems to constrain atmospheric column absorption of solar radiation in the

    E-Print Network [OSTI]

    Dong, Xiquan

    column absorption of solar radiation (Acol) is a fundamental part of the Earth's energy cycle.e., the Acol values at both regions converge to the same value ($0.27 of the total incoming solar radiation to constrain atmospheric column absorption of solar radiation in the optically thick limit, J. Geophys. Res

  4. Extending the Eikonal Approximation to Low Energy

    E-Print Network [OSTI]

    Pierre Capel; Tokuro Fukui; Kazuyuki Ogata

    2014-11-21

    E-CDCC and DEA, two eikonal-based reaction models are compared to CDCC at low energy (e.g. 20AMeV) to study their behaviour in the regime at which the eikonal approximation is supposed to fail. We confirm that these models lack the Coulomb deflection of the projectile by the target. We show that a hybrid model, built on the CDCC framework at low angular momenta and the eikonal approximation at larger angular momenta gives a perfect agreement with CDCC. An empirical shift in impact parameter can also be used reliably to simulate this missing Coulomb deflection.

  5. Approximating European Options by Rebate Barrier Options

    E-Print Network [OSTI]

    Song, Qingshuo

    2011-01-01

    When the underlying stock price is a strict local martingale process under an equivalent local martingale measure, Black-Scholes PDE associated with an European option may have multiple solutions. In this paper, we study an approximation for the smallest hedging price of such an European option. Our results show that a class of rebate barrier options can be used for this approximation, when its rebate and barrier are chosen appropriately. An asymptotic convergence rate is also achieved when the knocked-out barrier moves to infinity under suitable conditions.

  6. Column Density Profiles of Multi-Phase Gaseous Halos

    E-Print Network [OSTI]

    Liang, Cameron J; Agertz, Oscar

    2015-01-01

    We present a suite of high-resolution cosmological galaxy re-simulations of a Milky-Way size halo with variety of star-formation and feedback models to investigate the effects of the specific details of the star formation-feedback loop modeling on the observable properties of the circumgalactic medium (CGM). We show that properties of the CGM are quite sensitive to the details of star formation-feedback loop. The simulation which produces a very realistic late-type central galaxy fails to reproduce existing observations of CGM. At the same time, variations of parameters of star formation recipe or feedback modeling, such as cosmic rays feedback, brings predicted CGM in better agreement with observations. The simulations show that the column density profiles of ions arising in such gas are well described by an exponential function of the impact parameter. Ions with higher ionization energy have more extended profiles with the scale height of the exponential distribution scaling as a power law of the ionization...

  7. Exact and Approximate REML for Heteroscedastic Regression

    E-Print Network [OSTI]

    Smyth, Gordon K.

    Exact and Approximate REML for Heteroscedastic Regression Gordon K. Smyth Department of Mathematics, the above het- eroscedastic regression model is the most general model of the type considered by LN98 and SV to estimate the het- eroscedastic regression model by way of two coupled generalized linear models

  8. Semicirculant approximations in preconditioners for incompressible flow

    E-Print Network [OSTI]

    be successfully used as an approximate solver of a convection­diffusion problem in the BFB T ­preconditioner ([1 of the convection­ diffusion problem in the BFB T ­preconditioner for the incompressible Navier­ Stokes equations of discrete pressures. The square matrix F here is a discrete convection­diffusion operator. The BFB

  9. The Observer Algorithm for Visibility Approximation

    E-Print Network [OSTI]

    Doherty, Patrick

    , with dif- ferent view ranges and grid cell sizes. By changing the size of the grid cells that the algorithm or more sentries while moving to a goal position. Algorithms for finding a covert paths in the presence of stationary and moving sentries has been devised by [5] [6]. An approximate visibility algorithm was devised

  10. Approximate Inference and Protein-Folding

    E-Print Network [OSTI]

    Weiss, Yair

    Approximate Inference and Protein-Folding Chen Yanover and Yair Weiss School of Computer Science Side-chain prediction is an important subtask in the protein-folding problem. We show that #12;nding algorithms, including a widely used protein-folding software (SCWRL). 1 Introduction Inference in graphical

  11. Notion of p-value Parametric Approximations

    E-Print Network [OSTI]

    Nuel, Gregory

    Notion of p-value Parametric Approximations Power Significance of an Observation in Post-Genomics G, March 7 - 10, 2011 G. NUEL Significance of an Observation in Post-Genomics #12;Notion of p Power of a test ROC and AUC Example with GWAS G. NUEL Significance of an Observation in Post-Genomics

  12. Stochastic Approximation: Sturen in een veranderende wereld

    E-Print Network [OSTI]

    Bhulai, Sandjai

    gedaan door middel van simulaties of experimenten. Twee bekende algoritmes binnen Stochastic Approximation zijn het Robbins- Monro algoritme en het Kiefer-Wolfowitz algoritme. Deze algoritmes benaderen formule is de kleine rekentijd en het gebruik van beperkte geheugenruimte. Echter, het algoritme hangt af

  13. Approximations to the Distributed Activation Energy Model

    E-Print Network [OSTI]

    Approximations to the Distributed Activation Energy Model for Pyrolysis C.P. Please, 1 M.J. Mc, then resubmitted after minor revisions in September 2002. Abstract The Distributed Activation Energy Model (DAEM effective method for estimating kinetic parameters and the distribution of activation energies. Comparison

  14. Updated: May 28, 2010 Diophantine approximation,

    E-Print Network [OSTI]

    Waldschmidt, Michel

    Updated: May 28, 2010 Diophantine approximation, irrationality and transcendence Michel Waldschmidt [3] is: Theorem 121 (Lambert, 1761). For any r Q \\ {0}, the numbers tan r and er are irrational. In particular the number is irrational. The main tool is continued fractions, and the first goal of Lambert

  15. Updated: June 16, 2010 Diophantine approximation,

    E-Print Network [OSTI]

    Waldschmidt, Michel

    Updated: June 16, 2010 Diophantine approximation, irrationality and transcendence Michel. It is known (see for instance [31] p. 25) that if k is a positive integer, if an irrational real number has, 31, 13, 1]. Definition Given a real irrational number , a function = N R>0 is an irrationality

  16. Updated: May 16, 2010 Diophantine approximation,

    E-Print Network [OSTI]

    Waldschmidt, Michel

    Updated: May 16, 2010 Diophantine approximation, irrationality and transcendence Michel Waldschmidt of 2 We first give a geometrical proof of the irrationality of the number 2 = 1, 414 213 562 373 095 rectangle. This proves the irrationality of 2. In algebraic terms, the number x = 1 + 2 satisfies x = 2

  17. Updated: June 1, 2010 Diophantine approximation,

    E-Print Network [OSTI]

    Waldschmidt, Michel

    Updated: June 1, 2010 Diophantine approximation, irrationality and transcendence Michel Waldschmidt on the irrationality of er when r is a non-zero rational number. Next we show how a slight modification implies.1.1 Irrationality of er for r Q If r = a/b is a rational number such that er is also rational, then e|a| is also

  18. Quantum correlations of helicity entangled states in non-inertial frames beyond single mode approximation

    SciTech Connect (OSTI)

    Harsij, Zeynab Mirza, Behrouz

    2014-12-15

    A helicity entangled tripartite state is considered in which the degree of entanglement is preserved in non-inertial frames. It is shown that Quantum Entanglement remains observer independent. As another measure of quantum correlation, Quantum Discord has been investigated. It is explicitly shown that acceleration has no effect on the degree of quantum correlation for the bipartite and tripartite helicity entangled states. Geometric Quantum Discord as a Hilbert–Schmidt distance is computed for helicity entangled states. It is shown that living in non-inertial frames does not make any influence on this distance, either. In addition, the analysis has been extended beyond single mode approximation to show that acceleration does not have any impact on the quantum features in the limit beyond the single mode. As an interesting result, while the density matrix depends on the right and left Unruh modes, the Negativity as a measure of Quantum Entanglement remains constant. Also, Quantum Discord does not change beyond single mode approximation. - Highlights: • The helicity entangled states here are observer independent in non-inertial frames. • It is explicitly shown that Quantum Discord for these states is observer independent. • Geometric Quantum Discord is also not affected by acceleration increase. • Extending to beyond single mode does not change the degree of entanglement. • Beyond single mode approximation the degree of Quantum Discord is also preserved.

  19. Analysis of the Reactor Position Independent Monitor (PIM) Diagnostic

    SciTech Connect (OSTI)

    Hayes-Sterbenz, Anna Catherine

    2014-07-17

    In this note I analyze the physics determining the proposed reactor position independent monitor (PIM), which is the ratio (240Pu/239Pu)1/3 × (135Cs/137Cs)1/2. The PIM ratios in any reactor fuel is shown to increase monotonically with the time over which the fuel is irradiated. This is because the Cs ratio determines the neutron flux, while the Pu isotopic ratio is determined by the flux times the irradiation time. If the irradiation time for all fuel rods across the reactor is fixed, the PIM ratio is approximately constant in all rods. However, no information can be extracted from the PIM ratio on Pu isotopics unless both the flux (or Cs ratio) and the irradiation time (from, say, Ru isotopics) are known separately, i.e., the PIM ratio is not a fundamental parameter of any reactor. Thus, unless the PIM ratio has been measured for the specific fuel under interrogation, no information can be deduced from measurements or reactor simulations of PIM ratios in different fuel from the same reactor. However, if a PIM measurement has been in one spent fuel rod from a given reactor, all other rods that are known to have been in the reactor for the same irradiation period can be assumed to have approximately the same PIM ratio.

  20. Instrumentation and Equipment for Three Independent Research Labs

    SciTech Connect (OSTI)

    Darlene Roth

    2012-03-29

    Completed in 2011, Albright's new Science Center includes three independent student and faculty research labs in Biology, Chemistry/Biochemistry, and Physics (separate from teaching labs). Providing independent research facilities, they eliminate disruptions in classrooms and teaching labs, encourage and accommodate increased student interest, and stimulate advanced research. The DOE grant of $369,943 enabled Albright to equip these advanced labs for 21st century science research, with much instrumentation shared among departments. The specialty labs will enable Albright to expand its student-faculty research program to meet growing interest, help attract superior science students, maximize faculty expertise, and continue exceeding its already high rates of acceptance for students applying for postgraduate education or pharmaceutical research positions. Biology instrumentation/equipment supports coursework and independent and collaborative research by students and faculty. The digital shaker, CO{sub 2} and water bath incubators (for controlled cell growth), balance, and micropipettes support cellular biology research in the advanced cell biology course and student-faculty research into heavy metal induction of heat shock proteins in cultured mammalian cells and the development of PCR markers from different populations of the native tree, Franklinia. The gravity convection oven and lyophilizer support research into physical and chemical analysis of floodplain sediments used in assessment of riparian restoration efforts. The Bio-Rad thermocycler permits fast and accurate DNA amplification as part of research into genetic diversity in small mammal populations and how those populations are affected by land-use practices and environmental management. The Millipore water deionizing system and glassware washer provide general support of the independent research lab and ensure quality control of coursework and interdisciplinary research at the intersection of biology, chemistry, and toxicology. Grant purchases support faculty and students working in the areas of plant cellular biology, landscape ecology and wildlife management, wetland restoration, and ecotoxicology of aquatic invertebrates. Chemistry/BioChemistry instrumentation supports a wide range of research and teaching needs. The Dell quad core Xeon processors and Gaussian 09 support computational research efforts of two of our faculty. The computational work of one of these groups is part of close collaboration with one organic chemist and provides support info for the synthetic work of this professor and his students. Computational chemistry studies were also introduced into the physical chemistry laboratory course for junior chemistry concentrators. The AKTA plus system and superdex columns, Thermoscientific Sorvall RC-6 plus superspeed centrifuge, Nanodrop spectrometer, Eppendorf microfuge, Homogenizer and Pipetman pipetters were incorporated into a research project involving purification and characterization of a construct of beta 2-microglobulin by one of our biochemists. The vacuum system (glove box, stand, and pump) makes a significant contribution to the research of our inorganic chemist, the newest department member, working on research projects with four students. The glove box provides the means to carry out their synthetic work in an oxygenless atmosphere. Supporting basic research pursued by faculty and students, the remaining items (refrigerator/freezer units for flammable storage, freezer, refrigerated water bath, rotary evaporator system, vacuum oven, analytical and top-loading balances) were distributed between our biochemistry and chemistry research labs. The Nanodrop spectrometer, Sorvall centrifuge, and rotary evaporator system are used in several junior/senior lab courses in both biochemistry and chemistry. To date, 14 undergraduate research students have been involved in projects using the new instrumentation and equipment provided by this grant. Physics equipment acquired is radically transforming Albright research and teaching capabilities. The tw

  1. EVIDENCE OF CONTRIBUTION OF INTERVENING CLOUDS TO GAMMA-RAY BURST'S X-RAY COLUMN DENSITY

    SciTech Connect (OSTI)

    Wang, J.

    2013-10-20

    The origin of excess of X-ray column density with respect to optical extinction in gamma-ray bursts (GRBs) is still a puzzle. A proposed explanation of the excess is the photoelectric absorption due to the intervening clouds along a GRB's line of sight. Here, we test this scenario by using the intervening Mg II absorption as a tracer of the neutral hydrogen column density of the intervening clouds. We identify a connection between the large X-ray column density (and large column density ratio of log (N{sub H,X}/N{sub H{sub I}})?0.5) and large neutral hydrogen column density probed by the Mg II doublet ratio (DR). In addition, GRBs with large X-ray column density (and large ratio of log (N{sub H,X}/N{sub H{sub I}})>0) tend to have multiple saturated intervening absorbers with DR < 1.2. These results therefore indicate an additional contribution from the intervening system to the observed X-ray column density in some GRBs, although the contribution from the host galaxy alone cannot be excluded based on this study.

  2. Sparger Effects on Gas Volume Fraction Distributions in Vertical Bubble-Column Flows as Measured by Gamma-Densitometry Tomography

    SciTech Connect (OSTI)

    GEORGE,DARIN L.; SHOLLENBERGER,KIM ANN; TORCZYNSKI,JOHN R.

    2000-01-18

    Gamma-densitometry tomography is applied to study the effect of sparger hole geometry, gas flow rate, column pressure, and phase properties on gas volume fraction profiles in bubble columns. Tests are conducted in a column 0.48 m in diameter, using air and mineral oil, superficial gas velocities ranging from 5 to 30 cm s{sup -1}, and absolute column pressures from 103 to 517 kPa. Reconstructed gas volume fraction profiles from two sparger geometries are presented. The development length of the gas volume fraction profile is found to increase with gas flow rate and column pressure. Increases in gas flow rate increase the local gas volume fraction preferentially on the column axis, whereas increases in column pressure produce a uniform rise in gas volume fraction across the column. A comparison of results from the two spargers indicates a significant change in development length with the number and size of sparger holes.

  3. Producers. US independents: exploring for clout

    SciTech Connect (OSTI)

    Not Available

    1988-05-25

    Are US independent oil producers an emerging voice that will catapult the country towards a new, comprehensive energy policy. Or, are they voices in a quiet wilderness of traditional oil supply at prices posted by the majors. Certainly the independents drill 85% of all new wells and produce 41% of the country's oil. But contemporary pricing practices, accompanied by growing energy interdependencies on a global scale, are realities many independents see at a foggy distance. Will they adopt the New Think of product-price values, as the OPEC countries did many years ago. This issue also presents the following data in tabular form: (1) changes in the number of US producing wells and new wells completed by state, 1985-1987; (2) ED refining netback data for the US Gulf and West Coasts, Rotterdam, and Singapore for late May 1988; and (3) ED fuel price/tax series for countries of the Eastern Hemisphere, May 1988 edition. 5 figures, 6 tables.

  4. Second derivatives for approximate spin projection methods

    SciTech Connect (OSTI)

    Thompson, Lee M.; Hratchian, Hrant P.

    2015-02-07

    The use of broken-symmetry electronic structure methods is required in order to obtain correct behavior of electronically strained open-shell systems, such as transition states, biradicals, and transition metals. This approach often has issues with spin contamination, which can lead to significant errors in predicted energies, geometries, and properties. Approximate projection schemes are able to correct for spin contamination and can often yield improved results. To fully make use of these methods and to carry out exploration of the potential energy surface, it is desirable to develop an efficient second energy derivative theory. In this paper, we formulate the analytical second derivatives for the Yamaguchi approximate projection scheme, building on recent work that has yielded an efficient implementation of the analytical first derivatives.

  5. REQUESTS FOR INDEPENDENT STUDY Trinity College of Arts & Sciences

    E-Print Network [OSTI]

    . Independent study is of two types: Independent Study (non-research) and Research Independent Study. Courses://trinity.duke.edu/academic- requirements?p=independent-study-research-w-coding. Policies: The following policies apply to both types entitled Independent Study are individual non-research directed study in a field of special interest

  6. Pulse design without rotating wave approximation

    E-Print Network [OSTI]

    S. Ibáñez; Yi-Chao Li; Xi Chen; J. G. Muga

    2015-10-21

    We design realizable time-dependent semiclassical pulses to invert the population of a two-level system faster than adiabatically when the rotating-wave approximation cannot be applied. Different approaches, based on the counterdiabatic method or on invariants, may lead to singularities in the pulse functions. Ways to avoid or cancel the singularities are put forward when the pulse spans few oscillations. For many oscillations an alternative numerical minimization method is proposed and demonstrated.

  7. Approximate convex decomposition and its applications 

    E-Print Network [OSTI]

    Lien, Jyh-Ming

    2009-05-15

    Approved by: Chair of Committee, Nancy M. Amato Committee Members, Ergun Akleman Ricardo Gutierrez-Osuna Donald H. House John C. Keyser Head of Department, Valerie E. Taylor December 2006 Major Subject: Computer Science iii ABSTRACT Approximate Convex...-Yen Li, for teaching me about research. I would like to thank my committee members, John Keyser, Donald House, Ergun Akleman, and Ricardo Gutierrez-Osuna, who supported me through this challenging journey. I would like to thank everyone in the Algorithms...

  8. Semiclassical approximation in Batalin-Vilkovisky formalism

    E-Print Network [OSTI]

    Albert Schwarz

    1992-10-23

    The geometry of supermanifolds provided with $Q$-structure (i.e. with odd vector field $Q$ satisfying $\\{ Q,Q\\} =0$), $P$-structure (odd symplectic structure ) and $S$-structure (volume element) or with various combinations of these structures is studied. The results are applied to the analysis of Batalin-Vilkovisky approach to the quantization of gauge theories. In particular the semiclassical approximation in this approach is expressed in terms of Reidemeister torsion.

  9. Independent Oversight and Performance Assurance Program

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2002-10-31

    The Independent Oversight Program is designed to enhance the DOE safeguards and security; cyber security; emergency management; and environment, safety, and health programs by providing DOE and contractor managers, Congress, and other stakeholders with an independent evaluation of the adequacy of DOE policy and the effectiveness of line management performance in safeguards and security; cyber security; emergency management; environment, safety, and health; and other critical functions as directed by the Secretary. Cancels DOE O 470.2A and Attachment 2 of DOE O 414.1A. Canceled by DOE O 227.1.

  10. WKB Approximation to the Power Wall

    E-Print Network [OSTI]

    F. D. Mera; S. A. Fulling; J. D. Bouas; K. Thapa

    2013-03-28

    We present a semiclassical analysis of the quantum propagator of a particle confined on one side by a steeply, monotonically rising potential. The models studied in detail have potentials proportional to $x^{\\alpha}$ for $x>0$; the limit $\\alpha\\to\\infty$ would reproduce a perfectly reflecting boundary, but at present we concentrate on the cases $\\alpha =1$ and 2, for which exact solutions in terms of well known functions are available for comparison. We classify the classical paths in this system by their qualitative nature and calculate the contributions of the various classes to the leading-order semiclassical approximation: For each classical path we find the action $S$, the amplitude function $A$ and the Laplacian of $A$. (The Laplacian is of interest because it gives an estimate of the error in the approximation and is needed for computing higher-order approximations.) The resulting semiclassical propagator can be used to rewrite the exact problem as a Volterra integral equation, whose formal solution by iteration (Neumann series) is a semiclassical, not perturbative, expansion. We thereby test, in the context of a concrete problem, the validity of the two technical hypotheses in a previous proof of the convergence of such a Neumann series in the more abstract setting of an arbitrary smooth potential. Not surprisingly, we find that the hypotheses are violated when caustics develop in the classical dynamics; this opens up the interesting future project of extending the methods to momentum space.

  11. Influence of the gas-flow Reynolds number on a plasma column in a glass tube

    SciTech Connect (OSTI)

    Jin, Dong Jun; Uhm, Han S.; Cho, Guangsup [Department of Electronic and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul 139-701 (Korea, Republic of)] [Department of Electronic and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul 139-701 (Korea, Republic of)

    2013-08-15

    Atmospheric-plasma generation inside a glass tube is influenced by gas stream behavior as described by the Reynolds number (Rn). In experiments with He, Ne, and Ar, the plasma column length increases with an increase in the gas flow rate under laminar flow characterized by Rn < 2000. The length of the plasma column decreases as the flow rate increases in the transition region of 2000 < Rn < 4000. For a turbulent flow beyond Rn > 4000, the length of the plasma column is short in front of the electrode, eventually leading to a shutdown.

  12. Sub-to super-ambient temperature programmable microfabricated gas chromatography column

    DOE Patents [OSTI]

    Robinson, Alex L.; Anderson, Lawrence F.

    2004-03-16

    A sub- to super-ambient temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by combining a thermoelectric cooler and temperature sensing on the microfabricated column. Sub-ambient temperature programming enables the efficient separation of volatile organic compounds and super-ambient temperature programming enables the elution of less volatile analytes within a reasonable time. The small heat capacity and thermal isolation of the microfabricated column improves the thermal time response and power consumption, both important factors for portable microanalytical systems.

  13. Nonlinear adaptive control using radial basis function approximants 

    E-Print Network [OSTI]

    Petersen, Jerry Lee

    1993-01-01

    The purpose of this research is to present an adaptive control strategy using the radial basis function approximation method. Surface approximation methods using radial basis function approximants will first be discussed. ...

  14. Dolphins swim by rhythmically bending a variably flexible beam their vertebral column. With the evolution of fully

    E-Print Network [OSTI]

    Long Jr., John H.

    Dolphins swim by rhythmically bending a variably flexible beam ­ their vertebral column. With the evolution of fully aquatic swimming behavior, the vertebral column of cetaceans has undergone comprehensive with terrestrial mammals, vertebral columns with reduced thoracic spinous processes, unfused and lengthened sacral

  15. ROTARY FILTER FINES TESTING FOR SMALL COLUMN ION EXCHANGE

    SciTech Connect (OSTI)

    Herman, D.

    2011-08-03

    SRNL was requested to quantify the amount of 'fines passage' through the 0.5 micron membranes currently used for the rotary microfilter (RMF). Testing was also completed to determine if there is any additional benefit to utilizing a 0.1 micron filter to reduce the amount of fines that could pass through the filter. Quantifying of the amount of fines that passed through the two sets of membranes that were tested was accomplished by analyzing the filtrate by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) for titanium. Even with preparations to isolate the titanium, all samples returned results of less than the instrument's detection limit of 0.184 mg/L. Test results show that the 0.5 micron filters produced a significantly higher flux while showing a negligible difference in filtrate clarity measured by turbidity. The first targeted deployment of the RMF is with the Small Column Ion Exchange (SCIX) at the Savannah River Site (SRS). SCIX uses crystalline silicotitanate (CST) to sorb cesium to decontaminate a clarified salt solution. The passage of fine particles through the filter membranes in sufficient quantities has the potential to impact the downstream facilities. To determine the amount of fines passage, a contract was established with SpinTek Filtration to operate a 3-disk pilot scale unit with prototypic filter disk and various feeds and two different filter disk membranes. SpinTek evaluated a set of the baseline 0.5 micron filter disks as well as a set of 0.1 micron filter disks to determine the amount of fine particles that would pass the membrane and to determine the flux each set produced. The membrane on both disk sets is manufactured by the Pall Corporation (PMM 050). Each set of disks was run with three feed combinations: prototypically ground CST, CST plus monosodium titanate (MST), and CST, MST, plus Sludge Batch 6 (SB6) simulant. Throughout the testing, samples of the filtrate were collected, measured for turbidity, and sent back to SRNL for analysis to quantify the amount of fines that passed through the membrane. It should be noted that even though ground CST was tested, it will be transferred to the Defense Waste Processing Facility (DWPF) feed tank and is not expected to require filtration.

  16. Clubbed Binomial Approximation for the Lightbulb Process

    E-Print Network [OSTI]

    Goldstein, Larry

    2011-01-01

    In the so called lightbulb process, on days r=1,..,n, out of n lightbulbs, all initially off, exactly r bulbs selected uniformly and independent of the past have their status changed from off to on, or vice versa. With W_n the number of bulbs on at the terminal time n and C_n a suitable clubbed binomial distribution, d_{TV}(W_n,C_n) \\le 2.7314 \\sqrt{n} e^{-(n+1)/3} for all n \\ge 1. The result is shown using Stein's method.

  17. A statistical mechanical model of closed loop plectoneme supercoiling and its variational approximation

    E-Print Network [OSTI]

    Dominic J. O'. Lee

    2015-04-17

    Presented here, is a technical manuscript that may form the basis of later published work. In it, we develop a statistical mechanical model to describe a closed loop plectoneme, applicable for when the closed loop is sufficiently supercoiled. The model divides the system up into end loops and a braided section; the end loops are assumed to contribute little to the super-coil writhe. Within the braided section, the model incorporates interactions that depend on the structure of the molecule; in particular, we consider those that depend on helical structure. A method for approximating the steric interactions is utilized that we had previously used in other publications. We go on to construct variational approximations for our closed loop plectoneme model in two cases. The first case is where helix dependent interactions are strong, and in the second case they are considered weak. In developing these approximations, we approximate the Fuller-White condition by replacing, in all expressions that depend on twist, writhe with average writhe, valid when the braided section is sufficiently long. How this approximation is made and the conditions when this approximation is valid are also discussed. The approximation allows for a Legendre transformation of the free energy, which with the introduction of moment (or torque), effectively allowing for twist and average writhe to be treated independently in the transformed (Gibbs like) free energy. Next, we then show how one may compute the average writhe of the braided section. Lastly, we discuss how some of the approximations considered may be relaxed, and discuss how the resulting model free energy might be computed by MC simulation.

  18. Fast Kernel-Based Independent Component Analysis

    E-Print Network [OSTI]

    McAuliffe, Jon

    Fast Kernel-Based Independent Component Analysis Hao Shen , Stefanie Jegelka and Arthur Gretton instance, sources with near-zero kurtosis). FastKICA (Fast HSIC-based Kernel ICA) is a new optimisation-based ICA algorithms, FastKICA is applicable to any twice differentiable kernel function. Experimental

  19. Adaptive Background Estimation using Intensity Independent Features

    E-Print Network [OSTI]

    Lunds Universitet

    Adaptive Background Estimation using Intensity Independent Features Håkan Ardö, Rikard Berthilsson to rapid changes in lighting conditions. Furthermore, the features can be computed very efficiently using reliable way, also in outdoor scenes where the lighting conditions is changing rapidly due to passing

  20. OKLAHOMA STATE Report of Independent Accountants' Application

    E-Print Network [OSTI]

    Veiga, Pedro Manuel Barbosa

    OKLAHOMA STATE UNIVERSITY Report of Independent Accountants' Application of Agreed-Upon Procedures to Assist the University in Complying with NCAA Bylaws 6.2.3.1 Year Ended June 30, 2007 #12;OKLAHOMA STATE.2.3.1 .......................................................................................................................................... 1 Intercollegiate Athletics Program Accounts of Oklahoma State University and the Oklahoma State

  1. Energy Independence and Security Act of 2007

    SciTech Connect (OSTI)

    2011-12-30

    An Act passed in 2007 to move the United States toward greater energy independence and security, to increase the production of clean renewable fuels, to protect consumers, to increase the efficiency of products, buildings, and vehicles, to promote research on and deploy greenhouse gas capture and storage options, and to improve the energy performance of the Federal Government, and for other purposes.

  2. From Investor-owned Utility to Independent Power Producer

    E-Print Network [OSTI]

    Ishii, Jun

    2003-01-01

    Utility To Independent Power Producer Jun Ishii NovemberU t i l i t y to Independent Power Producer J u n Ishiii o n decision of independent power producers (IPPs) i n the

  3. Solution of systems of columns with energy exchange between recycle streams 

    E-Print Network [OSTI]

    Haas, Joe Ray

    1980-01-01

    Rate Profiles and Product Distribution for Example 10 122 32. Convergence Characteri. sties for Example 10 124 33. Execution Time and Number of Trials Required to Solve Examples 7 Through 10 126 34. Column Specifications, Feed Conditions...

  4. Heat and mass transfer in bubble column dehumidifiers for HDH desalination

    E-Print Network [OSTI]

    Tow, Emily W

    2014-01-01

    Heat and mass transfer processes governing the performance of bubble dehumidifier trays are studied in order to develop a predictive model and design rules for efficient and economical design of bubble column dehumidifiers ...

  5. A global comparison of carbon monoxide profiles and column amounts from Tropospheric Emission Spectrometer (TES)

    E-Print Network [OSTI]

    and anthropogenic incomplete combustion processes. In the presence of nitrogen oxides, carbon monoxide (COA global comparison of carbon monoxide profiles and column amounts from Tropospheric Emission compare carbon monoxide (CO) products from the Measurements of Pollution in the Troposphere (MOPITT

  6. WATER HAMMER WITH COLUMN SEPARATION: A REVIEW OF RESEARCH IN THE TWENTIETH CENTURY

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    of the parting liquid columns, will start to grow. The cavity acts as a vacuum, a low-pressure point, retarding through the entire pipeline and forms a severe load for hydraulic machinery, individual pipes

  7. UNIVERSITY OF CALIFORNIA, SAN DIEGO Experiments on Vortex Symmetrization in Magnetized Electron Plasma Columns

    E-Print Network [OSTI]

    California at San Diego, University of

    Plasma Columns A dissertation submitted in partial satisfaction of the requirements for the degree Doctor. Images of vorticity at five times for two sequences from similar initial conditions. The red arcs

  8. Hydrogen production in the K-Basin ion exchange columns, modules and cartridge filters

    SciTech Connect (OSTI)

    Not Available

    1994-12-21

    K-Basin uses ion exchange modules and ion exchange (IX) columns for removing radionuclides from the basin water. When the columns and modules are loaded, they are removed from service, drained and stored. After a few IX columns accumulate in storage, they are moved to a burial box. One of the burial box contains 33 columns and the other, six. The radionuclides act on the liquid left within and adhering to the beads to produce hydrogen. This report describes the generation rate, accumulation rate and significance of that accumulation. This summary also highlights those major areas of concern to the external (to Westinghouse Hanford Company [WHC]) reviewers. Appendix H presents the comments made by the external reviewers and, on a separate sheet, the responses to those comments. The concerns regarding the details of the analytical approach, are addressed in Appendix H and in the appropriate section.

  9. Column Studies of Anaerobic Carbon Tetrachloride Biotransformation with Hanford Aquifer Material

    E-Print Network [OSTI]

    Semprini, Lewis

    plutonium from irradiated uranium fuel rods. The waste CT was disposed of in three unlined, subsurface liquid-disposal facilities that permitted direct infiltration into the underlying soil column. Up to 580

  10. Formaldehyde distribution over North America: Implications for satellite retrievals of formaldehyde columns and isoprene emission

    E-Print Network [OSTI]

    Jacob, Daniel J.

    Formaldehyde distribution over North America: Implications for satellite retrievals of formaldehyde; published 8 September 2006. [1] Formaldehyde (HCHO) columns measured from space provide constraints measurements. Citation: Millet, D. B., et al. (2006), Formaldehyde distribution over North America

  11. Trace metal composition of suspended particulate matter in the water column of the Black Sea

    E-Print Network [OSTI]

    Murray, James W.

    Trace metal composition of suspended particulate matter in the water column of the Black Sea Ouz Keywords: Black Sea Geochemistry Biogeochemistry Biogeochemical cycle Trace metals Trace elements Tracers Particulates Suspended particulate matter Biogenic matter Biogenic material Plankton Planktonic metal

  12. High Performance Trays and Heat Exchangers in Heat Pumped Distillation Columns 

    E-Print Network [OSTI]

    Wisz, M. W.; Antonelli, R.; Ragi, E. G.

    1981-01-01

    exchangers and distillation trays permits additional energy savings by lower reboiler temperature differences, and reduced reflux requirements for a fixed column height, due to closer tray spacings. This paper surveys the heat pump systems currently...

  13. Wave Energy Extraction from an Oscillating Water Column in a Truncated Circular Cylinder 

    E-Print Network [OSTI]

    Wang, Hao

    2013-07-19

    Oscillating Water Column (OWC) device is a relatively practical and convenient way that converts wave energy to a utilizable form, which is usually electricity. The OWC is kept inside a fixed truncated vertical cylinder, which is a hollow structure...

  14. Centrifugal devices can replace traditional separation techniques such as column chromatography, preparative

    E-Print Network [OSTI]

    Lebendiker, Mario

    Centrifugal devices can replace traditional separation techniques such as column chromatography, preparative electrophoresis, alcohol or salt precipitation, dialysis, and gradient centrifugation when. Centrifugal Devices for Ultrafiltration & Microfiltration Nanosep®, MicrosepTM, Macrosep®, and Jumbosep

  15. Impact of Columns and Beams on the Thermal Resistance of the Building Envelope 

    E-Print Network [OSTI]

    Omar, E.

    2002-01-01

    This paper addresses the effect of thermal bridging due to columns and beams on energy consumption and peak load requirements of typical private residential villas in Kuwait. Although it is common practice to apply thermal insulation to walls...

  16. Approximating Ground and Excited State Energies on a Quantum Computer

    E-Print Network [OSTI]

    Stuart Hadfield; Anargyros Papageorgiou

    2015-08-06

    Approximating ground and a fixed number of excited state energies, or equivalently low order Hamiltonian eigenvalues, is an important but computationally hard problem. Typically, the cost of classical deterministic algorithms grows exponentially with the number of degrees of freedom. Under general conditions, and using a perturbation approach, we provide a quantum algorithm that produces estimates of a constant number $j$ of different low order eigenvalues. The algorithm relies on a set of trial eigenvectors, whose construction depends on the particular Hamiltonian properties. We illustrate our results by considering a special case of the time-independent Schr\\"odinger equation with $d$ degrees of freedom. Our algorithm computes estimates of a constant number $j$ of different low order eigenvalues with error $O(\\epsilon)$ and success probability at least $\\frac34$, with cost polynomial in $\\frac{1}{\\epsilon}$ and $d$. This extends our earlier results on algorithms for estimating the ground state energy. The technique we present is sufficiently general to apply to problems beyond the application studied in this paper.

  17. Particle flux transformation in the mesopelagic water column: process analysis and global balance 

    E-Print Network [OSTI]

    Guidi, Lionel

    2008-10-10

    IN THE MESOPELAGIC WATER COLUMN: PROCESS ANALYSIS AND GLOBAL BALANCE A Dissertation by LIONEL GUIDI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR... OF PHILOSOPHY May 2008 Major Subject: Oceanography PARTICLE FLUX TRANSFORMATION IN THE MESOPELAGIC WATER COLUMN: PROCESS ANALYSIS AND GLOBAL BALANCE A Dissertation by LIONEL GUIDI Submitted to the Office of Graduate...

  18. Two Independent Assessments Find the Department of Energy's Yucca...

    Broader source: Energy.gov (indexed) [DOE]

    independent assessments addressing areas critical to the overall success of the Yucca Mountain repository program. These assessments, which include an independent review of the...

  19. Independent Oversight Review, Portsmouth/Paducah Project Office...

    Energy Savers [EERE]

    Independent Oversight Review, PortsmouthPaducah Project Office - May 2012 Independent Oversight Review, PortsmouthPaducah Project Office - May 2012 May 2012 Review of the...

  20. Independent Oversight Targeted Review, Y-12 National Security...

    Energy Savers [EERE]

    Independent Oversight Targeted Review, Y-12 National Security Complex - February 2012 Independent Oversight Targeted Review, Y-12 National Security Complex - February 2012 February...

  1. New Independent Analysis Confirms Climate Bill Costs About a...

    Energy Savers [EERE]

    Independent Analysis Confirms Climate Bill Costs About a Postage Stamp a Day New Independent Analysis Confirms Climate Bill Costs About a Postage Stamp a Day August 4, 2009 -...

  2. Energy Independence for North America - Transition to the Hydrogen...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Independence for North America - Transition to the Hydrogen Economy Energy Independence for North America - Transition to the Hydrogen Economy 2003 DEER Conference Presentation:...

  3. The Office of Independent Enterprise Assessments' Office of Enforcemen...

    Office of Environmental Management (EM)

    The Office of Independent Enterprise Assessments' Office of Enforcement convened the 2014 DOE Safety and Security Enforcement Workshop May 13 and 14, 2014 The Office of Independent...

  4. New York Independent System Operator, Smart Grid RFI: Addressing...

    Office of Environmental Management (EM)

    Independent System Operator, Smart Grid RFI: Addressing Policy and Logistical Challenges. New York Independent System Operator, Smart Grid RFI: Addressing Policy and Logistical...

  5. Sensitivity approximation for robust stability and tracking 

    E-Print Network [OSTI]

    McLean, Chris Steven

    1984-01-01

    ) Norman W. Na gle (Member) Don R. Halverson (Member) William B. Jones (Head of Department) May 1984 1n Abstract Sensitivity Approximation for Robust Stability and Tracking. (May 1984) Chris Steven McLean, B. S, , Louisiana Tech University... indispensable to the completion of this thesis. I would like to thank Dr. S. P. Bhattacharyya for introducing me to the wonders of automatic control. I also would like to thank Dr. D. R. Halverson and Dr. N. W. Naugle for serving on my committee, Dr. John...

  6. Relativistic Random Phase Approximation At Finite Temperature

    SciTech Connect (OSTI)

    Niu, Y. F.; Paar, N.; Vretenar, D.; Meng, J.

    2009-08-26

    The fully self-consistent finite temperature relativistic random phase approximation (FTRRPA) has been established in the single-nucleon basis of the temperature dependent Dirac-Hartree model (FTDH) based on effective Lagrangian with density dependent meson-nucleon couplings. Illustrative calculations in the FTRRPA framework show the evolution of multipole responses of {sup 132}Sn with temperature. With increased temperature, in both monopole and dipole strength distributions additional transitions appear in the low energy region due to the new opened particle-particle and hole-hole transition channels.

  7. The Background Field Approximation in (quantum) cosmology

    E-Print Network [OSTI]

    R. Parentani

    1998-03-12

    We analyze the Hamilton-Jacobi action of gravity and matter in the limit where gravity is treated at the background field approximation. The motivation is to clarify when and how the solutions of the Wheeler-DeWitt equation lead to the Schr\\"odinger equation in a given background. To this end, we determine when and how the total action, solution of the constraint equations of General Relativity, leads to the HJ action for matter in a given background. This is achieved by comparing two neighboring solutions differing slightly in their matter energy content. To first order in the change of the 3-geometries, the change of the gravitational action equals the integral of the matter energy evaluated in the background geometry. Higher order terms are governed by the ``susceptibility'' of the geometry. These classical properties also apply to quantum cosmology since the conditions which legitimize the use of WKB gravitational waves are concomitant with those governing the validity of the background field approximation.

  8. The validity of the Background Field Approximation

    E-Print Network [OSTI]

    R. Parentani

    1997-10-10

    In the absence of a tractable theory of quantum gravity, quantum matter field effects have been so far computed by treating gravity at the Background Field Approximation. The principle aim of this paper is to investigate the validity of this approximation which is not specific to gravity. To this end, for reasons of simplicity and clarity, we shall compare the descriptions of thermal processes induced by constant acceleration (i.e. the Unruh effect) in four dynamical frameworks. In this problem, the position of the ``heavy'' accelerated system plays the role of gravity. In the first framework, the trajectory is treated at the BFA: it is given from the outset and unaffected by radiative processes. In the second one, recoil effects induced by these emission processes are taken into account by describing the system's position by WKB wave functions. In the third one, the accelerated system is described by second quantized fields and in the fourth one, gravity is turned on. It is most interesting to see when and why transitions amplitudes evaluated in different frameworks but describing the same process do agree. It is indeed this comparison that determines the validity of the BFA. It is also interesting to notice that the abandonment of the BFA delivers new physical insights concerning the processes. For instance, in the fourth framework, the ``recoils'' of gravity show that the acceleration horizon area acts as an entropy in delivering heat to accelerated systems.

  9. The local potential approximation in quantum gravity

    E-Print Network [OSTI]

    Dario Benedetti; Francesco Caravelli

    2012-10-09

    Within the context of the functional renormalization group flow of gravity, we suggest that a generic f(R) ansatz (i.e. not truncated to any specific form, polynomial or not) for the effective action plays a role analogous to the local potential approximation (LPA) in scalar field theory. In the same spirit of the LPA, we derive and study an ordinary differential equation for f(R) to be satisfied by a fixed point of the renormalization group flow. As a first step in trying to assess the existence of global solutions (i.e. true fixed point) for such equation, we investigate here the properties of its solutions by a comparison of various series expansions and numerical integrations. In particular, we study the analyticity conditions required because of the presence of fixed singularities in the equation, and we develop an expansion of the solutions for large R up to order N=29. Studying the convergence of the fixed points of the truncated solutions with respect to N, we find a characteristic pattern for the location of the fixed points in the complex plane, with one point stemming out for its stability. Finally, we establish that if a non-Gaussian fixed point exists within the full f(R) approximation, it corresponds to an R^2 theory.

  10. Recycling Authorizations: Toward Secondary and Approximate Authorizations Model

    E-Print Network [OSTI]

    of matching best suitable approximate authorizations. 1 Introduction Although, every authorization decision

  11. Bethe free energy, Kikuchi approximations and belief propagation

    E-Print Network [OSTI]

    Bethe free energy, Kikuchi approximations and belief propagation algorithms Jonathan S. Yedidia to a stationary point of an approximate free energy, known as the Bethe free energy in statis- tical physics- curate free energy approximations, of which Bethe's approximation is the simplest. Exploiting

  12. Approximate Stokes Drift Profiles in Deep Water

    E-Print Network [OSTI]

    Breivik, Øyvind; Bidlot, Jean-Raymond

    2014-01-01

    A deep-water approximation to the Stokes drift velocity profile is explored as an alternative to the monochromatic profile. The alternative profile investigated relies on the same two quantities required for the monochromatic profile, viz the Stokes transport and the surface Stokes drift velocity. Comparisons with parametric spectra and profiles under wave spectra from the ERA-Interim reanalysis and buoy observations reveal much better agreement than the monochromatic profile even for complex sea states. That the profile gives a closer match and a more correct shear has implications for ocean circulation models since the Coriolis-Stokes force depends on the magnitude and direction of the Stokes drift profile and Langmuir turbulence parameterizations depend sensitively on the shear of the profile. The alternative profile comes at no added numerical cost compared to the monochromatic profile.

  13. Nonlinear Independent Component Analysis: Existence and Uniqueness Results

    E-Print Network [OSTI]

    Hyvärinen, Aapo

    \\Lambda Corresponding author 1 #12; Nonlinear Independent Component Analysis: Existence and Uniqueness

  14. AN EXPLANATION FOR THE DIFFERENT X-RAY TO OPTICAL COLUMN DENSITIES IN THE ENVIRONMENTS OF GAMMA RAY BURSTS: A PROGENITOR EMBEDDED IN A DENSE MEDIUM

    SciTech Connect (OSTI)

    Krongold, Yair [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-264, 04510 Mexico DF (Mexico); Prochaska, J. Xavier, E-mail: xavier@ucolick.org [Department of Astronomy and Astrophysics, UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States)

    2013-09-10

    We study the {approx}> 10 ratios in the X-ray to optical column densities inferred from afterglow spectra of gamma ray bursts (GRBs) due to gas surrounding their progenitors. We present time-evolving photoionization calculations for these afterglows and explore different conditions of their environment. We find that homogenous models of the environment (constant density) predict X-ray columns similar to those found in the optical spectra, with the bulk of the opacity being produced by neutral material at large distances from the burst. This result is independent of gas density or metallicity. Only models assuming a progenitor immersed in a dense ({approx}10{sup 2-4} cm{sup -3}) cloud of gas (with radius {approx}10 pc), with a strong, declining gradient of density for the surrounding interstellar medium (ISM) are able to account for the large X-ray to optical column density ratios. However, to avoid an unphysical correlation between the size of this cloud and the size of the ionization front produced by the GRB, the models also require that the circumburst medium is already ionized prior to the burst. The inferred cloud masses are {approx}< 10{sup 6} M{sub Sun }, even if low metallicities in the medium are assumed (Z {approx} 0.1 Z{sub Sun }). These cloud properties are consistent with those found in giant molecular clouds and our results support a scenario in which the progenitors reside within intense star formation regions of galaxies. Finally, we show that modeling over large samples of GRB afterglows may offer strong constraints on the range of properties in these clouds, and the host galaxy ISM.

  15. Photoluminescence emission at room temperature in zinc oxide nano-columns

    SciTech Connect (OSTI)

    Rocha, L.S.R.; Deus, R.C.; Foschini, C.R.; Simões, A.Z.

    2014-02-01

    Highlights: • ZnO nanoparticles were obtained by microwave-hydrothermal method. • X-ray diffraction reveals a hexagonal structure. • Photoluminescence emission evidenced two absorption peaks, at around 480 nm and 590 nm wavelengths. - Abstract: Hydrothermal microwave method (HTMW) was used to synthesize crystalline zinc oxide (ZnO) nano-columns at the temperature of 120 °C with a soaking time of 8 min. ZnO nano-columns were characterized by using X-ray analyses (XRD), infrared spectroscopy (FT-IR), thermogravimetric analyses (TG-DTA), field emission gun and transmission electron microscopy (FEG-SEM and TEM) and photoluminescence properties (PL). XRD results indicated that the ZnO nano-columns are free of any impurity phase and crystallize in the hexagonal structure. Typical FT-IR spectra for ZnO nano-columns presented well defined bands, indicating a substantial short-range order in the system. PL spectra consist of a broad band at 590 nm and narrow band at 480 nm corresponding to a near-band edge emission related to the recombination of excitons and level emission related to structural defects. These results show that the HTMW synthesis route is rapid, cost effective, and could be used as an alternative to obtain ZnO nano-columns in the temperature of 120 °C for 8 min.

  16. COMPUTATIONAL AND EXPERIMENTAL MODELING OF THREE-PHASE SLURRY-BUBBLE COLUMN REACTOR

    SciTech Connect (OSTI)

    Isaac K. Gamwo; Dimitri Gidaspow

    1999-09-01

    Considerable progress has been achieved in understanding three-phase reactors from the point of view of kinetic theory. In a paper in press for publication in Chemical Engineering Science (Wu and Gidaspow, 1999) we have obtained a complete numerical solution of bubble column reactors. In view of the complexity of the simulation a better understanding of the processes using simplified analytical solutions is required. Such analytical solutions are presented in the attached paper, Large Scale Oscillations or Gravity Waves in Risers and Bubbling Beds. This paper presents analytical solutions for bubbling frequencies and standing wave flow patterns. The flow patterns in operating slurry bubble column reactors are not optimum. They involve upflow in the center and downflow at the walls. It may be possible to control flow patterns by proper redistribution of heat exchangers in slurry bubble column reactors. We also believe that the catalyst size in operating slurry bubble column reactors is not optimum. To obtain an optimum size we are following up on the observation of George Cody of Exxon who reported a maximum granular temperature (random particle kinetic energy) for a particle size of 90 microns. The attached paper, Turbulence of Particles in a CFB and Slurry Bubble Columns Using Kinetic Theory, supports George Cody's observations. However, our explanation for the existence of the maximum in granular temperature differs from that proposed by George Cody. Further computer simulations and experiments involving measurements of granular temperature are needed to obtain a sound theoretical explanation for the possible existence of an optimum catalyst size.

  17. Exact scheme independence at one loop

    E-Print Network [OSTI]

    Stefano Arnone; Antonio Gatti; Tim R. Morris

    2002-06-10

    The requirement that the quantum partition function be invariant under a renormalization group transformation results in a wide class of exact renormalization group equations, differing in the form of the kernel. Physical quantities should not be sensitive to the particular choice of the kernel. We demonstrate this scheme independence in four dimensional scalar field theory by showing that, even with a general kernel, the one-loop beta function may be expressed only in terms of the effective action vertices, and thus, under very general conditions, the universal result is recovered.

  18. Exact scheme independence at one loop

    E-Print Network [OSTI]

    Arnone, S; Morris, T R; Arnone, Stefano; Gatti, Antonio; Morris, Tim R.

    2002-01-01

    The requirement that the quantum partition function be invariant under a renormalization group transformation results in a wide class of exact renormalization group equations, differing in the form of the kernel. Physical quantities should not be sensitive to the particular choice of the kernel. We demonstrate this scheme independence in four dimensional scalar field theory by showing that, even with a general kernel, the one-loop beta function may be expressed only in terms of the effective action vertices, and thus, under very general conditions, the universal result is recovered.

  19. Multipole Extraction: A novel, model independent method

    E-Print Network [OSTI]

    E. Stiliaris; C. N. Papanicolas

    2007-03-20

    A novel method for extracting multipole amplitudes in the nucleon resonance region from electroproduction data is presented. The method is based on statistical concepts and it relies heavily on Monte Carlo and simulation techniques; it produces precise identification and determination of the contributing multipole amplitudes in the resonance region and for the first time a rigorous determination of the associated experimental uncertainty. The results are demonstrated to be independent of any model bias. The method is applied in the reanalysis of the $Q^{2}=0.127 GeV^2/c^2$ Bates and Mainz $N\\to \\Delta$ data.

  20. Pantex Falling Man - Independent Review Panel Report.

    SciTech Connect (OSTI)

    Bertolini, Louis; Brannon, Nathan; Olson, Jared; Price, Bernard; Wardle, Robert; Steinzig, Mike; Winfield, Michael

    2014-11-01

    Consolidated Nuclear Security (CNS) Pantex took the initiative to organize a Review Panel of subject matter experts to independently assess the adequacy of the Pantex Tripping Man Analysis methodology. The purpose of this report is to capture the details of the assessment including the scope, approach, results, and detailed Appendices. Along with the assessment of the analysis methodology, the panel evaluated the adequacy with which the methodology was applied as well as congruence with Department of Energy (DOE) standards 3009 and 3016. The approach included the review of relevant documentation, interactive discussion with Pantex staff, and the iterative process of evaluating critical lines of inquiry.

  1. Model independent determination of the {sigma} pole

    SciTech Connect (OSTI)

    Leutwyler, H.

    2008-08-31

    The first part of this report reviews recent developments at the interface between lattice work on QCD with light dynamical quarks, effective field theory and low energy precision experiments. Then I discuss how dispersion theory can be used to analyze the low energy structure of the {pi}{pi} scattering amplitude in a model independent manner. This leads to an exact formula for the mass and width of the lowest few resonances, in terms of observable quantities. As an application, I consider the pole position of the {sigma}, paying particular to error propagation in the numerical analysis. The report is based on work done in collaboration with Irinel Caprini and Gilberto Colangelo.

  2. Independent Study Form | Photosynthetic Antenna Research Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACT EVALUATION PLAN FOR THE SITE-218in a V2O5IonicIndependent Study Form

  3. Radiography Facility - Building 239 Independent Validation Review

    SciTech Connect (OSTI)

    Altenbach, T J; Beaulieu, R A; Watson, J F; Wong, H J

    2010-02-02

    The purpose of this task was to perform an Independent Validation Review to evaluate the successful implementation and effectiveness of Safety Basis controls, including new and revised controls, to support the implementation of a new DSA/TSR for B239. This task addresses Milestone 2 of FY10 PEP 7.6.6. As the first IVR ever conducted on a LLNL nuclear facility, it was designated a pilot project. The review follows the outline developed for Milestone 1 of the PEP, which is based on the DOE Draft Guide for Performance of Independent Verification Review of Safety Basis Controls. A formal Safety Basis procedure will be developed later, based on the lessons learned with this pilot project. Note, this review is termed a ''Validation'' in order to be consistent with the PEP definition and address issues historically raised about verification mechanisms at LLNL. Validation is intended to confirm that implementing mechanisms realistically establish the ability of TSR LCO, administrative control or safety management program to accomplish its intended safety function and that the controls are being implemented. This effort should not, however, be confused with a compliance assessment against all relevant DOE requirements and national standards. Nor is it used as a vehicle to question the derivation of controls already approved by LSO unless a given TSR statement simply cannot be implemented as stated.

  4. On the complexity of approximating a nash equilibrium

    E-Print Network [OSTI]

    Daskalakis, Constantinos

    2011-01-01

    We show that computing a relative---that is, multiplicative as opposed to additive---approximate Nash equilibrium in two-player games is PPAD-complete, even for constant values of the approximation. Our result is the first ...

  5. Approximations for the rotational excitation of molecules by atoms

    E-Print Network [OSTI]

    Chu, Shih-I; Dalgarno, A.

    1975-01-01

    The applicability of the effective close?coupling approximation of Rabitz and the centrifugal decoupling approximation of McGuire and Kouri is examined for a system which models the rotational excitation of molecular nitrogen in collisions...

  6. Report on some recent advances in Diophantine approximation

    E-Print Network [OSTI]

    Waldschmidt, Michel

    by linear forms · irrationality measures · transcendence criterion · criteria for algebraic inde- pendence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 Rational approximation to a real number . . . . . . . . . . . . . . . . . . . . . . . . 6 1, algebraic and simultaneous approximation to a single number

  7. Guest Editorial Sparse Approximations in Signal and Image Processing

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Guest Editorial Sparse Approximations in Signal and Image Processing Sparse approximation to solve many other signal processing problems, including blind source separation, feature extraction techniques to images as well as audio and biomedical signals, new efficient im- plementations of greedy

  8. Independent set problems and odd-hole-preserving graph reductions 

    E-Print Network [OSTI]

    Warren, Jeffrey Scott

    2009-05-15

    . Independent Set Problems For a graph G = (V;E), S V is an independent set if no vertices in S are adjacent. The maximum independent set (MIS) problem is to find an independent set of largest cardinality in a given graph. The maximum weight independent set... for determining the optimality of a best known solution of the master problem. Many have worked to solve both the MIS and MWIS problems exactly. Tech- niques include explicit enumeration of maximal independent sets [4], combinato- rial branch-and-bound [5, 6, 7, 8...

  9. Oil production from thin oil columns subject to water and gas coning 

    E-Print Network [OSTI]

    Chai, Kwok Kit

    1981-01-01

    OIL PRODUCTION FROM THIN OIL COLUMNS SUBJECT TO MATER AND GAS CONING A Thesis by KMOK KIT CHAI Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1981... Major Subject: Petroleum Engineering OIL PRODUCTION FROM THIN OIL COLUMNS SUBJECT TO WATER AND GAS CONING A Thesis by KWOK KIT CHAI Approved as to style and content by airman of o t ee Member Member Head o Department May 1981 ABSTRACT Oil...

  10. Bond selective chemistry beyond the adiabatic approximation

    SciTech Connect (OSTI)

    Butler, L.J. [Univ. of Chicago, IL (United States)

    1993-12-01

    One of the most important challenges in chemistry is to develop predictive ability for the branching between energetically allowed chemical reaction pathways. Such predictive capability, coupled with a fundamental understanding of the important molecular interactions, is essential to the development and utilization of new fuels and the design of efficient combustion processes. Existing transition state and exact quantum theories successfully predict the branching between available product channels for systems in which each reaction coordinate can be adequately described by different paths along a single adiabatic potential energy surface. In particular, unimolecular dissociation following thermal, infrared multiphoton, or overtone excitation in the ground state yields a branching between energetically allowed product channels which can be successfully predicted by the application of statistical theories, i.e. the weakest bond breaks. (The predictions are particularly good for competing reactions in which when there is no saddle point along the reaction coordinates, as in simple bond fission reactions.) The predicted lack of bond selectivity results from the assumption of rapid internal vibrational energy redistribution and the implicit use of a single adiabatic Born-Oppenheimer potential energy surface for the reaction. However, the adiabatic approximation is not valid for the reaction of a wide variety of energetic materials and organic fuels; coupling between the electronic states of the reacting species play a a key role in determining the selectivity of the chemical reactions induced. The work described below investigated the central role played by coupling between electronic states in polyatomic molecules in determining the selective branching between energetically allowed fragmentation pathways in two key systems.

  11. Approximation Algorithms for Multi-criteria Traveling Salesman Problems

    E-Print Network [OSTI]

    Al Hanbali, Ahmad

    +3-42 +, respectively. Moreover, we design ran- domized approximation algorithms for multi-criteria () -ATSP (ratio 1 2. Therefore, we design randomized approximation schemes for multi-criteria cycle cover problems by showingApproximation Algorithms for Multi-criteria Traveling Salesman Problems Bodo Manthey1 and L

  12. Numerical Approximation of Vortex Density Evolution in a Superconductor.

    E-Print Network [OSTI]

    Styles, Vanessa

    Numerical Approximation of Vortex Density Evolution in a Superconductor. C.M. Elliott & V. Styles Abstract A #12;nite volume/element approximation of a mean #12;eld model of superconducting vortices in one approximations of a two-dimensional version of the mean #12;eld model of superconducting vortices considered

  13. Input-ouput approximation for nonlinear structural dynamics 

    E-Print Network [OSTI]

    Beaver, Stefanie Rene'

    2009-05-15

    . Nonlinear Assumed Model with Fixed Rotation Rate . 51 V NONLINEAR INPUT-OUTPUT APPROXIMATION . . . . . . 54 A. Algorithm Overview . . . . . . . . . . . . . . . . . . . . . 54 B. Linear Input-Output Approximation . . . . . . . . . . . . 57 C. Least Squares.... Quadratic Assumed Modes with Higher-Order Terms . 77 ix CHAPTER Page 2. Application of Nonlinear Input-Output Approxi- mation Algorithm . . . . . . . . . . . . . . . . . . . . 81 a. Linear Input-Output Approximation . . . . . . . 82 b. Least Squares...

  14. Technical Note Variational free energy and the Laplace approximation

    E-Print Network [OSTI]

    Daunizeau, Jean

    Technical Note Variational free energy and the Laplace approximation Karl Friston,a, Jérémie October 2006 This note derives the variational free energy under the Laplace approximation, with a focus. This is relevant when using the free energy as an approximation to the log-evidence in Bayesian model averaging

  15. Quantifying the seasonal and interannual variability of North American isoprene emissions using satellite observations of the formaldehyde column

    E-Print Network [OSTI]

    2006-01-01

    Satellite observations of formaldehyde over North Americasatellites: Application to formaldehyde retrievals from theNorth America using formaldehyde column observations from

  16. | | |SUBSCRIBE Renew Customer Service Premium Content HOME MAGAZINE ARCHIVE COLUMNS JOBS & CAREERS REPORTS MIT INSIDER FREE NEWSLETTER

    E-Print Network [OSTI]

    Reif, John H.

    | | |SUBSCRIBE Renew Customer Service Premium Content HOME MAGAZINE ARCHIVE COLUMNS JOBS & CAREERS REPORTS MIT INSIDER FREE NEWSLETTER TOPICS Biotech Business Computing Energy Nanotech Security Software

  17. Exact scheme independence at two loops

    E-Print Network [OSTI]

    Stefano Arnone; Antonio Gatti; Tim R. Morris; Oliver J. Rosten

    2003-11-11

    We further develop an algorithmic and diagrammatic computational framework for very general exact renormalization groups, where the embedded regularisation scheme, parametrised by a general cutoff function and infinitely many higher point vertices, is left unspecified. Calculations proceed iteratively,by integrating by parts with respect to the effective cutoff, thus introducing effective propagators, and differentials of vertices that can be expanded using the flow equations; many cancellations occur on using the fact that the effective propagator is the inverse of the classical Wilsonian two-point vertex. We demonstrate the power of these methods by computing the beta function up to two loops in massless four dimensional scalar field theory, obtaining the expected universal coefficients, independent of the details of the regularisation scheme.

  18. Measurement-device-independent quantum cryptography

    E-Print Network [OSTI]

    Feihu Xu; Marcos Curty; Bing Qi; Hoi-Kwong Lo

    2015-01-07

    In theory, quantum key distribution (QKD) provides information-theoretic security based on the laws of physics. Owing to the imperfections of real-life implementations, however, there is a big gap between the theory and practice of QKD, which has been recently exploited by several quantum hacking activities. To fill this gap, a novel approach, called measurement-device-independent QKD (mdiQKD), has been proposed. It can remove all side-channels from the measurement unit, arguably the most vulnerable part in QKD systems, thus offering a clear avenue towards secure QKD realisations. Here, we review the latest developments in the framework of mdiQKD, together with its assumptions, strengths and weaknesses.

  19. Model-independent particle accelerator tuning

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Scheinker, Alexander; Pang, Xiaoying; Rybarcyk, Larry

    2013-10-21

    We present a new model-independent dynamic feedback technique, rotation rate tuning, for automatically and simultaneously tuning coupled components of uncertain, complex systems. The main advantages of the method are: 1) It has the ability to handle unknown, time-varying systems, 2) It gives known bounds on parameter update rates, 3) We give an analytic proof of its convergence and its stability, and 4) It has a simple digital implementation through a control system such as the Experimental Physics and Industrial Control System (EPICS). Because this technique is model independent it may be useful as a real-time, in-hardware, feedback-based optimization scheme formore »uncertain and time-varying systems. In particular, it is robust enough to handle uncertainty due to coupling, thermal cycling, misalignments, and manufacturing imperfections. As a result, it may be used as a fine-tuning supplement for existing accelerator tuning/control schemes. We present multi-particle simulation results demonstrating the scheme’s ability to simultaneously adaptively adjust the set points of twenty two quadrupole magnets and two RF buncher cavities in the Los Alamos Neutron Science Center Linear Accelerator’s transport region, while the beam properties and RF phase shift are continuously varying. The tuning is based only on beam current readings, without knowledge of particle dynamics. We also present an outline of how to implement this general scheme in software for optimization, and in hardware for feedback-based control/tuning, for a wide range of systems.« less

  20. Public Comment re Section 934 of the Energy Independence and...

    Energy Savers [EERE]

    Section 934 of the Energy Independence and Security Act of 2007 Public Comment by the Uranium Producers of America (UPA) re Section 934 of the Energy Independence and Security Act...

  1. The Web: Challenge and Opportunity for an Independent Journal

    E-Print Network [OSTI]

    Kaiser, Klaus

    The Web: Challenge and Opportunity for an Independent Journal Klaus Kaiser Houston Journal What is an Independent Journal? 1 2 Print Editions 3 3 Electronic Editions 4 4 Legal and Business journal a major task. Most independent journals face the additional obstacle of not having the financial

  2. Pop Up Radio Archive: A Solution for Independent Producers

    E-Print Network [OSTI]

    Militzer, Burkhard

    Pop Up Radio Archive: A Solution for Independent Producers Anne Wootton, Bailey Smith, and Christen Penny UC Berkeley School of Information May 4, 2012 #12;Pop Up Radio Archive 2 Abstract Independent* solutions do not adequately serve independent radio producers, who "have all these hard drives at home

  3. Nested Column Generation applied to the Crude Oil Tanker Routing and Scheduling Problem with

    E-Print Network [OSTI]

    Lübbecke, Marco

    Nested Column Generation applied to the Crude Oil Tanker Routing and Scheduling Problem with Split, Germany March 7, 2012 Abstract The split pickup split delivery crude oil tanker routing and scheduling, because of the large expenses in crude oil shipping it is attractive to make use of optimization

  4. A New Kind of Column Materials for Gas Chromatographic Hydrogen Isotope Separation

    SciTech Connect (OSTI)

    Hara, M.; Shima, H.; Akamaru, S.; Abe, T.; Matsuyama, M.; Watanabe, K. [Toyama University (Japan)

    2005-07-15

    A new kind of materials that can be applied to a gas chromatographic hydrogen isotope separation system was developed to reduce the amount of Pd-Pt alloy required for making the column and to improve the separation efficiency. Pd and Pt were deposited on {alpha}-Al{sub 2}O{sub 3} powder by using a barrel sputtering system. Prepared sample powder was characterized from surface morphology, element distributions on the surface, composition and crystallinity. The characterization showed that a uniform layer of Pd-Pt alloy with expected composition was formed on Al{sub 2}O{sub 3} particles. The crystallinity, however, was poor, but improved after annealing at 1073 K for 2 hours. The hydrogen absorbing behavior was also improved by the annealing. A separation column was prepared from the annealed powder and was subjected to experiments on hydrogen isotope separation. The column of annealed powder gave considerably good separation efficiency around room temperature, in spite that only 0.35 g of Pd-Pt was used for the column. The amount of Pd-Pt alloy used here should be compared to previous results, where 1.5 g of Pd-Pt powder was required for high separation efficiency. The new material was quite effective to reduce the amount of Pd-Pt alloy without compromising the separation efficiency and can give further improvement.

  5. Improving total column ozone retrievals by using cloud pressures derived from Raman scattering in the UV

    E-Print Network [OSTI]

    Joiner, Joanna

    Improving total column ozone retrievals by using cloud pressures derived from Raman scattering resolution, coverage, and sampling of the Aura satellite ozone monitoring instrument (OMI), as compared with the total ozone mapping spectrometer (TOMS) should allow for improved ozone retrievals. By default, the TOMS

  6. Constraining global isoprene emissions with Global Ozone Monitoring Experiment (GOME) formaldehyde column measurements

    E-Print Network [OSTI]

    Palmer, Paul

    Constraining global isoprene emissions with Global Ozone Monitoring Experiment (GOME) formaldehyde emission estimates are highly uncertain because of a lack of direct observations. Formaldehyde (HCHO the observation of this trace gas to help constrain isoprene emissions. We use HCHO column observations from

  7. Mapping isoprene emissions over North America using formaldehyde column observations from space

    E-Print Network [OSTI]

    Palmer, Paul

    Mapping isoprene emissions over North America using formaldehyde column observations from space. [1] We present a methodology for deriving emissions of volatile organic compounds (VOC) using space to local VOC emissions, with a spatial smearing that increases with the VOC lifetime. Isoprene

  8. Upflow column reactor design for dechlorination of chlorinated pulping wastes by Penicillium camemberti

    E-Print Network [OSTI]

    Taseli, Hasan

    . Introduction The main constraints of effluent discharges from the pulp and paper mill industry are adsorbable technology that permits continuous and efficient treatment of chlorinated effluents from the paper industryUpflow column reactor design for dechlorination of chlorinated pulping wastes by Penicillium

  9. Intercomparison of Single-Column Numerical Models for the Prediction of Radiation Fog

    E-Print Network [OSTI]

    Intercomparison of Single-Column Numerical Models for the Prediction of Radiation Fog THIERRY-term forecasting of fog is a difficult issue that can have a large societal impact. Radiation fog appears layers of the atmosphere. Current NWP models poorly forecast the life cycle of fog, and improved NWP

  10. Home National Sports Business World Features Columns Editorial Japan has key role in ITER project

    E-Print Network [OSTI]

    would house a mass of precision machines used to control the colossal amount of energy it would generateHome National Sports Business World Features Columns Editorial Top Japan has key role in ITER reactor has been settled after a contest lasting several years between Japan and the European Union

  11. Water column structure and statistics of Denmark Strait Overflow Water cyclones

    E-Print Network [OSTI]

    Pickart, Robert S.

    Water column structure and statistics of Denmark Strait Overflow Water cyclones Wilken-Jon von November 2013 Keywords: Denmark Strait overflow water cyclone East Greenland boundary current system East the characteristics and dynamics of Denmark Strait Overflow Water (DSOW) cyclones. On average, a cyclone passes

  12. SOFTWARE ENGINEERING Page 1 of 4 SEMESTER OFFERED PRE-REQUISITES are listed in this column.

    E-Print Network [OSTI]

    SOFTWARE ENGINEERING Page 1 of 4 1st Year SEMESTER OFFERED PRE-REQUISITES are listed in this column AMAT 217 and MATH 211; recommended co-req: AMAT 219 2nd Year Software Engineering: Regular Program will be deemed correct. 2014/2015 Curriculum (Updated June 13, 2014) #12;SOFTWARE ENGINEERING Page 2 of 4 2nd

  13. INTERCOMPARISON OF LONG TERM SINGLE-COLUMN MODEL SIMULATIONS OF CLOUDS AT THE ARM SGP SITE

    E-Print Network [OSTI]

    INTERCOMPARISON OF LONG TERM SINGLE-COLUMN MODEL SIMULATIONS OF CLOUDS AT THE ARM SGP SITE Hua Song simulated clouds with observations at the ARM SGP site. The six SCMs from GFDL AM2 and AM3, KNMI distributions between SCMs and ARM observation under both ascending and descending regimes. The cloud

  14. TWO-DIMENSIONAL COMPRESSION OF SURFACE ELECTROMYOGRAPHIC SIGNALS USING COLUMN-CORRELATION SORTING AND IMAGE ENCODERS

    E-Print Network [OSTI]

    Carvalho, João Luiz

    TWO-DIMENSIONAL COMPRESSION OF SURFACE ELECTROMYOGRAPHIC SIGNALS USING COLUMN-CORRELATION SORTING of Computer Science. chaffim@gmail.com INTRODUCTION Surface Electromyographic (S-EMG) signals are important different approaches have been proposed for compression of electromyographic signals, including DPCM [3

  15. Design of Extraction Column Methanol Recovery System for the TAME Reactive Distillation Process

    E-Print Network [OSTI]

    Al-Arfaj, Muhammad A.

    Design of Extraction Column Methanol Recovery System for the TAME Reactive Distillation Process, Dhahran, 31261, Saudi Arabia Abstract This paper studies the synthesis and the design of methanol recovery that methanol could be recovered completely from the hydrocarbon when 5 equilibrium trays in the extraction

  16. Black-Box Identification for PLC based MPC of a Binary Distillation Column

    E-Print Network [OSTI]

    Black-Box Identification for PLC based MPC of a Binary Distillation Column B. Huyck ,, F. Logist J is to upgrade the control system with a linear MPC running on a PLC. However, before a model based controller can be used on a PLC, an accurate (but simple) process model has to be constructed. Hence, the aim

  17. An evaluation of the elevated water table concept using laboratory columns with sulphidic tailings

    E-Print Network [OSTI]

    Aubertin, Michel

    The elevated water table concept is a potentially effective means of reducing acid mine drainage from reactive for controlling acid mine drainage from mine tailings. The laboratory experiments used columns of tailings from acid mine drainage. RESUME La technique de la nappe surélevée est considérée comme un moyen efficace

  18. Sand column impact onto a Kolsky pressure bar , N.A. Fleck a

    E-Print Network [OSTI]

    Wadley, Haydn

    Sand column impact onto a Kolsky pressure bar S. Park a , T. Uth a , N.A. Fleck a , H.N.G. Wadley b loading Sand-structure interaction a b s t r a c t A laboratory-based methodology to launch cylindrical sand slugs at high velocities is developed. The methodology generates well-characterised soil ejecta

  19. ADVANCED DIAGNOSTIC TECHNIQUES FOR THREE-PHASE SLURRY BUBBLE COLUMN REACTORS (SBCR)

    SciTech Connect (OSTI)

    M.H. Al-Dahhan; M.P. Dudukovic; L.S. Fan

    2001-07-25

    This report summarizes the accomplishment made during the second year of this cooperative research effort between Washington University, Ohio State University and Air Products and Chemicals. The technical difficulties that were encountered in implementing Computer Automated Radioactive Particle Tracking (CARPT) in high pressure SBCR have been successfully resolved. New strategies for data acquisition and calibration procedure have been implemented. These have been performed as a part of other projects supported by Industrial Consortium and DOE via contract DE-2295PC95051 which are executed in parallel with this grant. CARPT and Computed Tomography (CT) experiments have been performed using air-water-glass beads in 6 inch high pressure stainless steel slurry bubble column reactor at selected conditions. Data processing of this work is in progress. The overall gas holdup and the hydrodynamic parameters are measured by Laser Doppler Anemometry (LDA) in 2 inch slurry bubble column using Norpar 15 that mimic at room temperature the Fischer Tropsch wax at FT reaction conditions of high pressure and temperature. To improve the design and scale-up of bubble column, new correlations have been developed to predict the radial gas holdup and the time averaged axial liquid recirculation velocity profiles in bubble columns.

  20. Liquid-phase thermal diffusion isotope separation apparatus and method having tapered column

    DOE Patents [OSTI]

    Rutherford, W.M.

    1985-12-04

    A thermal diffusion counterflow method and apparatus for separating isotopes in solution in which the solution is confined in a long, narrow, vertical slit which tapers from bottom to top. The variation in the width of the slit permits maintenance of a stable concentration distribution with relatively long columns, thus permitting isotopic separation superior to that obtained in the prior art.

  1. Zoology 109 (2006) 5465 Differential segmental growth of the vertebral column of the rat

    E-Print Network [OSTI]

    Bergmann, Philip J.

    2006-01-01

    ZOOLOGY Zoology 109 (2006) 54­65 Differential segmental growth of the vertebral column of the rat (Rattus norvegicus) Philip J. BergmannÃ, Amanda D. Melin, Anthony P. Russell Vertebrate Morphology the development of these organisms. We investigate the segmental and regional growth of the entire vertebral

  2. Effects from Alkali-Silica Reacton and Delayed Ettringite Formation on Reinforced Concrete Column Lap Splices 

    E-Print Network [OSTI]

    Eck, Mary

    2012-07-16

    were constructed and kept in a laboratory, preventing ASR/DEF deterioration. Post-tensioning was used to simulate axial load on a bridge column. Structural load tests were performed on eight specimens with no ASR/DEF damage to late stage ASR...

  3. Control structure selection of a deethanizer column with partial condenser Proceedings of European Congress of Chemical Engineering (ECCE-6)

    E-Print Network [OSTI]

    Skogestad, Sigurd

    separates ethane (C2) from propane (C3). This is a multicomponent column with a partial condenser and vapor for pressure control, the results show that this is not a problem if a temperature loop is also closed a high column pressure or a low condenser temperature, so the use of a partial condenser can avoid

  4. Spatial distribution of isoprene emissions from North America derived from formaldehyde column measurements by the OMI satellite sensor

    E-Print Network [OSTI]

    Boersma, Folkert

    Spatial distribution of isoprene emissions from North America derived from formaldehyde column-borne formaldehyde (HCHO) column measurements from the Ozone Monitoring Instrument (OMI), with 13 Â 24 km2 nadir. Guenther (2008), Spatial distribution of isoprene emissions from North America derived from formaldehyde

  5. FY05 Targeted Technology Transfer to US Independents

    SciTech Connect (OSTI)

    Donald F. Duttlinger; E. Lance Cole

    2005-11-01

    Petroleum Technology Transfer Council (PTTC) was established by domestic crude oil and natural gas producers in 1994 as a national not-for-profit organization to address the increasingly urgent need to improve the technology-transfer process in the U.S. upstream petroleum industry. PTTC's technology-transfer programs enhance U.S. national security. PTTC administers the only nation-wide, comprehensive program dedicated to maximizing America's supplies of domestic oil and gas. PTTC conducts grassroots programs through 10 Regional Lead Organizations (RLOs) and two satellite offices, leveraging their preexisting connections with industry. This organizational structure helps bring researchers and academia to the table. Nationally and regionally, volunteers within a National Board and Regional Producer Advisory Groups guide efforts. The National Board meets three times per year, an important function being approving the annual plans and budgets developed by the regions and Headquarters (HQ). Between Board meetings, an active Management and Budget Committee guide HQ activity. PTTC itself undergoes a thorough financial audit each year. The PTTC's HQ staff plans and manages all aspects of the PTTC program, conducts nation-wide technology-transfer activities, and implements a comprehensive communications program. Networking, involvement in technical activities, and an active exhibit schedule are increasing PTTC's sphere of influence with both producers and the oilfield service sector. Circulation for ''PTTC Network News'', the quarterly newsletter, has risen to nearly 17,500. About 7,500 people receive an email Technology Alert on an approximate three-week frequency. Case studies in the ''Petroleum Technology Digest in World Oil'' appear monthly, as do ''Tech Connections'' columns in ''The American Oil and Gas Reporter''. As part of its oversight responsibility for the regions, the PTTC from the start has captured and reported data that document the myriad ways its programs impact industry. Of 119 workshops in FY05 where repeat attendance was reported, 59 percent of attendees on average had attended a PTTC event previously, indicating that a majority felt they were receiving enough value to come back. It also is encouraging that, after 11 years, PTTC events continue to attract new people. The form used at workshops to get participants feedback asks for a ''yes'' or ''no'' response to the question: ''Have you used any new technologies based on knowledge gained through PTTC?'' With data now available from 611 workshops, 41 percent of respondents said, ''yes'', confirming that people are applying the information they receive at PTTC workshops. PTTC in FY04 asked RLO directors, oilfield service companies and producers in 11 areas with significant technological barriers to adding new reserves to estimate the ''PTTC Impact Factor''--that is, the percentage of the total reserves added in their areas that logically could be attributed to PTTC's efforts. Of the estimated 1,266 million barrels of oil equivalent (BOE) added in the 11 areas, participants estimated that roughly 88 million BOE had been added as a result of PTTC's techtransfer efforts. PTTC's 10 regions are the primary delivery mechanism for technology transfer. Attendance at PTTC regional activities set a record in FY05, with 8,900 individuals attending 154 workshops, lunch-and-learn events, or student training and internships. When appropriate, regional workshops incorporate R&D findings from DOE-funded projects. This year HQ began a ''Microhole Technology Integration'' Initiative with DOE to more clearly present their microhole program to producers. Often events are held cooperatively with other national organizations, regional producer associations and professional society groups. This practice leverages outreach and engenders future cooperation. Of the more than 61,000 individuals PTTC has attracted to its events since its inception, more than 15,000 have attended in the past two years. Eight-eight percent of PTTC event attendees during FY05 were from industry. The numb

  6. Automating approximate Bayesian computation by local linear regression

    E-Print Network [OSTI]

    Thornton, Kevin R

    2009-01-01

    computation by local linear regression Kevin R Thorntonof ABC based on using a linear regression to approximate theimplements the local linear-regression approach to ABC. The

  7. The Numerical Approximation of Solutions of Partial Differential ...

    E-Print Network [OSTI]

    2009-05-05

    i.e., instead of thinking of the approximate solution as being linear between .... Consider the mildly nonlinear two-point boundary problem given by. ?(aux )x + c(

  8. How to Solve Schroedinger Problems by Approximating the Potential Function

    SciTech Connect (OSTI)

    Ledoux, Veerle; Van Daele, Marnix

    2010-09-30

    We give a survey over the efforts in the direction of solving the Schroedinger equation by using piecewise approximations of the potential function. Two types of approximating potentials have been considered in the literature, that is piecewise constant and piecewise linear functions. For polynomials of higher degree the approximating problem is not so easy to integrate analytically. This obstacle can be circumvented by using a perturbative approach to construct the solution of the approximating problem, leading to the so-called piecewise perturbation methods (PPM). We discuss the construction of a PPM in its most convenient form for applications and show that different PPM versions (CPM,LPM) are in fact equivalent.

  9. Approximation Algorithms for the Fault-Tolerant Facility Placement Problem

    E-Print Network [OSTI]

    Yan, Li

    2013-01-01

    5.2 Algorithm ECHS with Ratio5.3 Algorithm EBGS with RatioFormulation 2.1.3 Approximation Algorithms . 2.1.4 Bifactor

  10. ANALOG QUANTUM NEURON FOR FUNCTIONS APPROXIMATION A. EZHOV; A...

    Office of Scientific and Technical Information (OSTI)

    FOR FUNCTIONS APPROXIMATION A. EZHOV; A. KHROMOV; G. BERMAN 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; IMPLEMENTATION; NERVE CELLS; WAVEGUIDES We describe a system able...

  11. Determination of the total grain size distributionin a vulcanian eruption column, and its implications to stratospheric aerosol perturbation

    SciTech Connect (OSTI)

    Murrow, P.J.; Rose, W.I. Jr.; Self, S.

    1980-11-01

    Grain size analysis of samples representing all sampleable portions of the airfall deposit produced by the Fuego volcano in Guatemala on 14 October 1974 form the basis for estimating the total grain size distribution of tephra from this eruption. The region enclosed by each isopach has a particular average grain size distribution which can be weighted proportionally to its percentage volume. The grain size of pyroclastic avalanche deposits produced during the eruption are also included. The total grain size distribution calculated as a sum of weighted distributions has a median grain size of 0.80 (0.6mm) and a sorting coefficient (sigma0) of 2.3. The size distribution seems to approximate Rosin and Rammler's law of crushing and this observation allows us to estimate that no more than 15% volume of the fine tail of the total size distribution is likely to be missing. The ash composed of these fine particles did not fall in the region of the volcano as part of the recognizable tephra blanket. The eruption column reached well into the stratosphere: heights estimated from the ground were 10 to 12 km above sea level but estimated heights based on mass flux rates are higher (18 to 23 km). The proportion of ash smaller than 2 ..mu..m, which could remain for substantial periods in the stratosphere, is no more than 0.8% volume of the total. It seems probable that acid aerosol particles from vulcanian type eruptions are more important to stratospheric aerosol perturbation than fine silicate ash particles by at least an order of magnitude.

  12. Uncorrelated versus independent elliptically-contoured distributions for anomalous change detection in hyperspectral imagery

    SciTech Connect (OSTI)

    Theiler, James P; Scovel, James C

    2008-01-01

    The detection of actual changes in a pair of images is confounded by the inadvertent but pervasive differences that inevitably arise whenever two pictures are taken of the same scene, but at different times and under different conditions. These differences include effects due to illumination, calibration, misregistration, etc. If the actual changes are assumed to be rare, then one can 'learn' what the pervasive differences are, and can identify the deviations from this pattern as the anomalous changes. A recently proposed framework for anomalous change detection recasts the problem as one of binary classification between pixel pairs in the data and pixel pairs that are independently chosen from the two images. When an elliptically-contoured (EC) distribution is assumed for the data, then analytical expressions can be derived for the measure of anomalousness of change. However, these expression are only available for a limited class of EC distributions. By replacing independent pixel pairs with uncorrelated pixel pairs, an approximate solution can be found for a much broader class of EC distributions. The performance of this approximation is investigated analytically and empirically, and includes experiments comparing the detection of real changes in real data.

  13. Design and Implementation of a Micron-Sized Electron Column Fabricated by Focused Ion Beam Milling

    E-Print Network [OSTI]

    Wicki, Flavio; Escher, Conrad; Fink, Hans-Werner

    2015-01-01

    We have designed, fabricated and tested a micron-sized electron column with an overall length of about 700 microns comprising two electron lenses; a micro-lens with a minimal bore of 1 micron followed by a second lens with a bore of up to 50 microns in diameter to shape a coherent low-energy electron wave front. The design criteria follow the notion of scaling down source size, lens-dimensions and kinetic electron energy for minimizing spherical aberrations to ensure a parallel coherent electron wave front. All lens apertures have been milled employing a focused ion beam and could thus be precisely aligned within a tolerance of about 300 nm from the optical axis. Experimentally, the final column shapes a quasi-planar wave front with a minimal full divergence angle of 4 mrad and electron energies as low as 100 eV.

  14. Design criteria for multi-layered scintillating fibre arrays with inclined columns

    E-Print Network [OSTI]

    P. Achenbach; L. Nungesser; J. Pochodzalla

    2008-02-29

    Multi-layered scintillating fibre arrays read-out are commonly used as high resolution charged particle hodoscopes. Fibres of a column along the geometrical trajectory of incident particles are typically grouped to one pixel of a multi-channel read-out device. In some applications the incident particles will cross the detection plane with large angles w.r.t. the normal to the layers. Then, the packing of the fibres needs to be adapted to the incident particles and the columns need to be inclined. In this paper possible fibre array geometries are shown, relevant design criteria for detectors are discussed, and the effect of diverging particles incident on fibre arrays was studied using a Monte Carlo simulation.

  15. Safety Evaluation for Packaging for onsite Transfer of plutonium recycle test reactor ion exchange columns

    SciTech Connect (OSTI)

    Smith, R.J.

    1995-09-11

    The purpose of this Safety Evaluation for Packaging (SEP) is to authorize the use of three U.S. Department of Transportation (DOT) 7A, Type A metal boxes (Capital Industries Part No. S 0600-0600-1080- 0104) to package 12 Plutonium Recycle Test Reactor (PRTR) ion exchange columns as low-level waste (LLW). The packages will be transferred from the 309 Building in the 300 Area to low level waste burial in the 200 West Area. Revision 1 of WHC-SD-TP-SEP-035 (per ECN No. 621467) documents that the boxes containing ion exchange columns and grout will maintain the payload under normal conditions of transport if transferred without the box lids

  16. Processes and catalysts for conducting Fischer-Tropsch synthesis in a slurry bubble column reactor

    DOE Patents [OSTI]

    Singleton, A.H.; Oukaci, R.; Goodwin, J.G.

    1999-08-17

    Processes and catalysts are disclosed for conducting Fischer-Tropsch synthesis in a slurry bubble column reactor (SBCR). One aspect of the invention involves the use of cobalt catalysts without noble metal promotion in an SBCR. Another aspect involves using palladium promoted cobalt catalysts in an SBCR. Methods for preparing noble metal promoted catalysts via totally aqueous impregnation and procedures for producing attrition resistant catalysts are also provided. 1 fig.

  17. Processes and catalysts for conducting fischer-tropsch synthesis in a slurry bubble column reactor

    DOE Patents [OSTI]

    Singleton, Alan H. (Marshall Township, Allegheny County, PA); Oukaci, Rachid (Allison Park, PA); Goodwin, James G. (Cranberry Township, PA)

    1999-01-01

    Processes and catalysts for conducting Fischer-Tropsch synthesis in a slurry bubble column reactor (SBCR). One aspect of the invention involves the use of cobalt catalysts without noble metal promotion in an SBCR. Another aspect involves using palladium promoted cobalt catalysts in an SBCR. Methods for preparing noble metal promoted catalysts via totally aqueous impregnation and procedures for producing attrition resistant catalysts are also provided.

  18. Experimental Ion Exchange Column With SuperLig 639 And Simulant Formulation

    SciTech Connect (OSTI)

    Morse, Megan; Nash, C.

    2013-08-26

    SuperLig®639 ion exchange resin was tested as a retrieval mechanism for pertechnetate, through decontamination of a perrhenate spiked 5M Simple Average Na{sup +} Mass Based Simulant. Testing included batch contacts and a three-column ion exchange campaign. A decontamination of perrhenate exceeding 99% from the liquid feed was demonstrated. Analysis of the first formulation of a SBS/WESP simulant found unexpectedly low concentrations of soluble aluminum. Follow-on work will complete the formulation.

  19. Hydrodynamics of Fischer-Tropsch synthesis in slurry bubble column reactors: Final report

    SciTech Connect (OSTI)

    Bukur, D.B.; Daly, J.G.; Patel, S.A.; Raphael, M.L.; Tatterson, G.B.

    1987-06-01

    This report describes studies on hydrodynamics of bubble columns for Fischer-Tropsch synthesis. These studies were carried out in columns of 0.051 m and 0.229 m in diameter and 3 m tall to determine effects of operating conditions (temperature and gas flow rate), distributor type (sintered metal plate and single and multi-hole perforated plates) and liquid media (paraffin and reactor waxes) on gas hold-up and bubble size distribution. In experiments with the Fischer-Tropsch (F-T) derived paraffin wax (FT-300) for temperatures between 230 and 280/sup 0/C there is a range of gas velocities (transition region) where two values of gas hold-up (i.e., two flow regimes) are possible. Higher hold-ups were accompanied by the presence of foam (''foamy'' regime) whereas lower values were obtained in the absence of foam (''slug flow'' in the 0.051 m column, or ''churn-turbulent'' flow regime in the 0.229 m column). This type of behavior has been observed for the first time in a system with molten paraffin wax as the liquid medium. Several factors which have significant effect on foaming characteristics of this system were identified. Reactor waxes have much smaller tendency to foam and produce lower hold-ups due to the presence of larger bubbles. Finally, new correlations for prediction of the gas hold-up and the specific gas-liquid interfacial area were developed on the basis of results obtained in the present study. 49 refs., 99 figs., 19 tabs.

  20. Approximate Dynamic Programming for Networks: Fluid Models and Constraint Reduction

    E-Print Network [OSTI]

    Veatch, Michael H.

    of approximating functions for the differential cost. The first contribution of this paper is identifying new or piece-wise quadratic. Fluid cost has been used to initialize the value iteration algorithm [5Approximate Dynamic Programming for Networks: Fluid Models and Constraint Reduction Michael H

  1. USING THE LINEAR NOISE APPROXIMATION TO CHARACTERIZE MOLECULAR NOISE IN

    E-Print Network [OSTI]

    Ingalls, Brian

    USING THE LINEAR NOISE APPROXIMATION TO CHARACTERIZE MOLECULAR NOISE IN REACTION PATHWAYS Matthew Canada N2L 3G1 Abstract The Linear Noise Approximation offers an elegant analytic method to probe the effects of molecular noise on small-scale chemical reaction pathways by expanding the full chemical Master

  2. Motivation and Outline Hatree-Fock Theory and KLI Approximation

    E-Print Network [OSTI]

    Holzwarth, Natalie

    Motivation and Outline Hatree-Fock Theory and KLI Approximation Frozen core orbital approximation March 24, 2011 Xiao Xu, N. A. W. Holzwarth PAW + HF & KLI #12;Motivation and Outline Hatree-Fock Theory of HF and KLI Conclusion Outline 1 Motivation of this work: Why? orbital dependent functionals + PAW 2

  3. Transport approximations in partially diffusive media Guillaume Bal

    E-Print Network [OSTI]

    Bal, Guillaume

    Transport approximations in partially diffusive media Guillaume Bal Department of Applied Physics concerns the analysis of approximations of transport equations in diffusive media. Firstly, we consider a variational formulation for the first-order transport equation that has the correct diffusive behavior

  4. PROJECT REPORT USING NEURAL NETWORKS FOR APPROXIMATE RADIOSITY FORM FACTOR

    E-Print Network [OSTI]

    Anderson, Charles W.

    PROJECT REPORT USING NEURAL NETWORKS FOR APPROXIMATE RADIOSITY FORM FACTOR COMPUTATION Submitted, between each pair of objects within the scene. This project report explores the use of neural networks.3 Approximation with Neural Networks : : : : : : : : : : : : : : : : : : : : : : : 2 1.4 Outline of Project Report

  5. Tighter Bounds for Graph Steiner Tree Approximation Gabriel Robins

    E-Print Network [OSTI]

    Zelikovsky, Alexander

    and properties. In Section 3 we present our main algorithm, called k-LCA. The basic approximation result for k-LCA is proved in Section 4. In Sections 5 and 6 we prove an approximation ratio of the k-LCA algorithm in general graphs, and estimate the performance of the Iterated 1-Steiner and k-LCA heuristics in qu

  6. Tutorial, GECCO'05, Washington D.C. Fitness Approximation

    E-Print Network [OSTI]

    Yang, Shengxiang

    1 Tutorial, GECCO'05, Washington D.C. Fitness Approximation in Evolutionary Computation Yaochu Jin Honda Research Institute Europe Khaled Rasheed University of Georgia Tutorial, GECCO'05, Washington D expensive fitness evaluations Tutorial, GECCO'05, Washington D.C. Fitness Approximation Methods · Problem

  7. The Approximation of Nuclear Contaminant Transport in Porous Media

    E-Print Network [OSTI]

    Douglas Jr., Jim

    of a chain of radioactive waste products and to present the results of some typical simulationsThe Approximation of Nuclear Contaminant Transport in Porous Media Jim Douglas, Jr. #3; Chieh;ective and eÆcient numerical method for approximating the solution of equations that govern the transport

  8. Technical Note Variational free energy and the Laplace approximation

    E-Print Network [OSTI]

    Penny, Will

    Technical Note Variational free energy and the Laplace approximation Karl Friston,a, Jérémie the variational free energy under the Laplace approximation, with a focus on accounting for additional model complexity induced by increasing the number of model parameters. This is relevant when using the free energy

  9. Fast Vectorless Power Grid Verification Using an Approximate Inverse Technique

    E-Print Network [OSTI]

    Najm, Farid N.

    Fast Vectorless Power Grid Verification Using an Approximate Inverse Technique Nahi H. Abdul Ghani Department of ECE University of Toronto Toronto, Ontario, Canada f.najm@utoronto.ca ABSTRACT Power grid Aids General Terms Performance, Algorithms, Verification Keywords Power grid, voltage drop, approximate

  10. Fresnel approximations for acoustic fields of rectangularly symmetric sources

    E-Print Network [OSTI]

    Mast, T. Douglas

    Fresnel approximations for acoustic fields of rectangularly symmetric sources T. Douglas Masta for determining the acoustic fields of rectangularly symmetric, baffled, time-harmonic sources under the Fresnel. The expressions presented are generalized to three different Fresnel approximations that correspond, respectively

  11. Energy Content of Colliding Plane Waves using Approximate Noether Symmetries

    E-Print Network [OSTI]

    M. Sharif; Saira Waheed

    2011-09-19

    This paper is devoted to study the energy content of colliding plane waves using approximate Noether symmetries. For this purpose, we use approximate Lie symmetry method of Lagrangian for differential equations. We formulate the first-order perturbed Lagrangian for colliding plane electromagnetic and gravitational waves. It is shown that in both cases, there does not exist

  12. Approximate and Multipartite Quantum Correlation (Communication) Zhaohui Wei

    E-Print Network [OSTI]

    Jain, Rahul

    classical distributions or bipartite quantum states in the single-shot setting by Zhang (Proc. 3rd Innov that the cost to approximate a bipartite quantum state equals that to approximate its exact purifications, which the latter. We characterize the relationship between them by giving upper and lower bounds. 4

  13. Model-independent approaches for the XFEM in fracture Safdar Abbas1 Alaskar Alizada2 and Thomas-Peter Fries2

    E-Print Network [OSTI]

    Model-independent approaches for the XFEM in fracture mechanics Safdar Abbas1 Alaskar Alizada2 to fracture mechanics involve enriching the regions near the crack-tips. The accuracy of such approximations fields in the near-tip region for the fracture model considered. Consequently, for each fracture model

  14. Fine coal flotation plant waste comparison--column vs. sub-a cells

    SciTech Connect (OSTI)

    Ehrlinger, H.P. III.

    1991-01-01

    The objective of this project was to compare results from a small commercially sized Deister Flotaire column flotation cell with the subaeration cells at Kerr-McGee's Galatia plant during side by side testing of feed splits from the same sources. Typical cell criteria for both cells are included in the appendix. The project involved the activities of three organizations: the Kerr-McGee Coal Corporation, the Deister Concentrator Company, and the Illinois State Geological Survey. Their roles were as follows: Kerr-McGee installed the Deister column with sample splitter and tailings volume measuring cell in the Galatia Coal Preparation Plant to treat a representative split of their flotation feed; Deister provided a 30 inch diameter {times} 35{prime} high Deister Flotaire Column Flotation Cell capable of treating nominally one ton per hour or slightly over 1% of the plant feed. Deister additionally provided the sample splitter and the tailings volume measuring cell. ISGS personnel worked with both companies on the installation, conducted laboratory tests to direct the early plant test reagent practice, attended all of the plant runs cutting representative samples of feed, measuring slurry and reagent flows, preparing samples and writing reports.

  15. IMPACT OF THE SMALL COLUMN ION EXCHANGE PROCESS ON THE DEFENSE WASTE PROCESSING FACILITY - 12112

    SciTech Connect (OSTI)

    Koopman, D.; Lambert, D.; Fox, K.; Stone, M.

    2011-11-07

    The Savannah River Site (SRS) is investigating the deployment of a parallel technology to the Salt Waste Processing Facility (SWPF, presently under construction) to accelerate high activity salt waste processing. The proposed technology combines large waste tank strikes of monosodium titanate (MST) to sorb strontium and actinides with two ion exchange columns packed with crystalline silicotitanate (CST) resin to sorb cesium. The new process was designated Small Column Ion Exchange (SCIX), since the ion exchange columns were sized to fit within a waste storage tank riser. Loaded resins are to be combined with high activity sludge waste and fed to the Defense Waste Processing Facility (DWPF) for incorporation into the current glass waste form. Decontaminated salt solution produced by SCIX will be fed to the SRS Saltstone Facility for on-site immobilization as a grout waste form. Determining the potential impact of SCIX resins on DWPF processing was the basis for this study. Accelerated salt waste treatment is projected to produce a significant savings in the overall life cycle cost of waste treatment at SRS.

  16. Calcite precipitation dominates the electrical signatures of zero valent iron columns under simulated field conditions

    SciTech Connect (OSTI)

    Wu, Yuxin; Versteeg, R.; Slater, L.; LaBrecque, D.

    2009-06-01

    Calcium carbonate is a secondary mineral precipitate influencing zero valent iron (ZVI) barrier reactivity and hydraulic performance. We conducted column experiments to investigate electrical signatures resulting from concurrent CaCO{sub 3} and iron oxides precipitation under simulated field geochemical conditions. We identified CaCO{sub 3} as a major mineral phase throughout the columns, with magnetite present primarily close to the influent based on XRD analysis. Electrical measurements revealed decreases in conductivity and polarization of both columns, suggesting that electrically insulating CaCO{sub 3} dominates the electrical response despite the presence of electrically conductive iron oxides. SEM/EDX imaging suggests that the electrical signal reflects the geometrical arrangement of the mineral phases. CaCO{sub 3} forms insulating films on ZVI/magnetite surfaces, restricting charge transfer between the pore electrolyte and ZVI particles, as well as across interconnected ZVI particles. As surface reactivity also depends on the ability of the surface to engage in redox reactions via charge transfer, electrical measurements may provide a minimally invasive technology for monitoring reactivity loss due to CaCO{sub 3} precipitation. Comparison between laboratory and field data shows consistent changes in electrical signatures due to iron corrosion and secondary mineral precipitation.

  17. Properties of the Boltzmann equation in the classical approximation

    SciTech Connect (OSTI)

    Tanji, Naoto; Epelbaum, Thomas; Gelis, Francois; Wu, Bin

    2014-12-30

    We study the Boltzmann equation with elastic point-like scalar interactions in two different versions of the the classical approximation. Although solving numerically the Boltzmann equation with the unapproximated collision term poses no problem, this allows one to study the effect of the ultraviolet cutoff in these approximations. This cutoff dependence in the classical approximations of the Boltzmann equation is closely related to the non-renormalizability of the classical statistical approximation of the underlying quantum field theory. The kinetic theory setup that we consider here allows one to study in a much simpler way the dependence on the ultraviolet cutoff, since one has also access to the non-approximated result for comparison.

  18. Properties of the Boltzmann equation in the classical approximation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Epelbaum, Thomas; Gelis, François; Tanji, Naoto; Wu, Bin

    2014-12-30

    We examine the Boltzmann equation with elastic point-like scalar interactions in two different versions of the the classical approximation. Although solving numerically the Boltzmann equation with the unapproximated collision term poses no problem, this allows one to study the effect of the ultraviolet cutoff in these approximations. This cutoff dependence in the classical approximations of the Boltzmann equation is closely related to the non-renormalizability of the classical statistical approximation of the underlying quantum field theory. The kinetic theory setup that we consider here allows one to study in a much simpler way the dependence on the ultraviolet cutoff, since onemore »has also access to the non-approximated result for comparison.« less

  19. Independent Oversight Review, Oak Ridge Transuranic Waste Processing...

    Energy Savers [EERE]

    results of an independent oversight review of the management of safety significant structures, systems, and components at the Oak Ridge Transuranic Waste Processing Center...

  20. Independent Oversight Review, Hanford Site Waste Treatment and...

    Broader source: Energy.gov (indexed) [DOE]

    during the current review included observation of DOE Office of River Protection (ORP) welding inspections and one hydrostatic and three pneumatic pressure tests. Independent...

  1. Independent Oversight Review, Savannah River Site Salt Waste...

    Broader source: Energy.gov (indexed) [DOE]

    Savannah River Site Salt Waste Processing Facility Safety Basis and Design Development. This report documents the results of an independent oversight review of the safety basis and...

  2. Independent Oversight Review of the Technical Area 55 Safety...

    Office of Environmental Management (EM)

    the FSS is not credited for a Performance Category-3 (PC-3) evaluation basis earthquake, but is credited for PC-2 events. The Independent Oversight team reviewed...

  3. Independence Power and Light- Residential Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Independence Power and Light (IPL) offers rebates to residential customers for purchasing new, energy efficient appliances. Rebates are available on central air conditioning systems, heat pumps,...

  4. Independent Oversight Special Review, Department of Energy sites...

    Broader source: Energy.gov (indexed) [DOE]

    February 2008 Independent Oversight Special Review of Workplace Exposure Monitoring This report provides the results of a Special Review of Construction Safety and Health Programs...

  5. Independent Oversight Activity Report, Los Alamos National Laboratory...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and issues in the development and implementation of the Los Alamos National Laboratory industrial hygiene worker exposure assessment program. Independent Oversight Activity...

  6. Independent Oversight Special Review, Rocky Flats Closure Project...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Rocky Flats Closure Project Site - April 2001 Independent Oversight Special Review, Rocky Flats Closure Project Site - April 2001 April 2001 Special Review of the Rocky Flats...

  7. Savannah River Site - Salt Waste Processing Facility Independent...

    Office of Environmental Management (EM)

    SALT WASTE PROCESSING FACILITY INDEPENDENT TECHNICAL REVIEW November 22, 2006 Conducted by: Harry Harmon, Team Lead CivilStructural Sub Team Facility Safety Sub Team Engineering...

  8. Independent Oversight Focused Review, Kansas City Plant, Summary...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Review, Kansas City Plant, Summary Report - December 2001 Independent Oversight Focused Review, Kansas City Plant, Summary Report - December 2001 December 2001 Focused Review of...

  9. The role of women in the fight for Egyptian independence 

    E-Print Network [OSTI]

    Reynolds, Jennifer

    2013-02-22

    for the success of nationalist activity during the fight for Egyptian independence is inadequate for it overlooks the tremendous contributions of the WWCC and Egyptian women....

  10. Independence Power and Light- New Homes Rebate Program

    Broader source: Energy.gov [DOE]

    Independence Power and Light offers rebates to builders for constructing new, energy efficient homes which meet ENERGY STAR standards. Builders who meet ENERGY STAR standards and install specified...

  11. Independent Oversight Activity Report, Los Alamos National Laboratory...

    Energy Savers [EERE]

    Activity Report, Los Alamos National Laboratory - February 12, 2014 Independent Oversight Activity Report, Los Alamos National Laboratory - February 12, 2014 February 2014 Review...

  12. Independent Oversight Review of DOE Headquarters Emergency Response...

    Energy Savers [EERE]

    Review of DOE Headquarters Emergency Response Plans and Performance, March 2003 Independent Oversight Review of DOE Headquarters Emergency Response Plans and Performance, March...

  13. Independent Oversight Review of the Lawrence Livermore National...

    Energy Savers [EERE]

    Review of the Lawrence Livermore National Laboratory - March 2001 Independent Oversight Review of the Lawrence Livermore National Laboratory - March 2001 March 2001 Review of the...

  14. Independent Oversight Review, Hanford Site CH2M Hill Plateau...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    CH2M Hill Plateau Remediation Company - November 2012 Independent Oversight Review, Hanford Site CH2M Hill Plateau Remediation Company - November 2012 November 2012 Review of the...

  15. Independent Oversight Review, Savannah River Site Tritium Facilities...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    June 2012 Independent Oversight Review, Savannah River Site Tritium Facilities - June 2012 June 2012 Review of the Savannah River Site Tritium Facilities Implementation...

  16. Model independent extraction of the proton magnetic radius from...

    Office of Scientific and Technical Information (OSTI)

    Details In-Document Search This content will become publicly available on October 20, 2015 Title: Model independent extraction of the proton magnetic radius from electron...

  17. Independent Oversight Assessment, Y-12 National Security Complex...

    Broader source: Energy.gov (indexed) [DOE]

    June 2012 Assessment of Nuclear Safety Culture at the Y-12 National Security Complex Uranium Processing Facility Project This report provides the results of an independent...

  18. Independent Activity Report, Los Alamos National Security - June...

    Office of Environmental Management (EM)

    Los Alamos National Security - June 2011 Independent Activity Report, Los Alamos National Security - June 2011 June 2011 Review of the Los Alamos National Security Emergency...

  19. Independent Oversight Review of the Savannah River Site Salt...

    Broader source: Energy.gov (indexed) [DOE]

    material, temperature reading of the motor enclosure, and manual rotation of the pump shaft for 15 and one quarter turns. Independent Oversight reviewed the recommendations for...

  20. Independent Oversight Review, Hanford K Basin and Cold Vacuum...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Independent Activity Report, Richland Operations Office - June 2011 Site Visit Report, Hanford Sludge Treatment Project 105-KW - August 2011 EIS-0245-SA-03: Supplement Analysis...

  1. Independent Oversight Review of the NNSA Production Office Readiness...

    Energy Savers [EERE]

    Independent Oversight Review of the NNSA Production Office Readiness Review Program February 2014 Office of Safety and Emergency Management Evaluations Office of Enforcement and...

  2. Grid-independent Issue in Numerical Heat Transfer

    E-Print Network [OSTI]

    Yao Wei; Wang Jian; Liao Guangxuan

    2006-09-26

    Grid independent is associated with the accuracy or even rationality of numerical results. This paper takes two-dimensional steady heat transfer for example to reveal the effect of grid resolution on numerical results. The law of grid dependence is obtained and a simple mathematical formula is presented. The production acquired here can be used as the guidance in choosing grid density in numerical simulation and get exact grid independent value without using infinite fine grid. Through analyzing grid independent, we can find the minimum number of grid cells that is needed to get grid-independent results. Such strategy can save computational resource while ensure a rational computational result.

  3. Stochastic realization theory for exact and approximate multiscale models

    E-Print Network [OSTI]

    Tucker, Dewey S. (Dewey Stanton)

    2005-01-01

    The thesis provides a detailed analysis of the independence structure possessed by multiscale models and demonstrates that such an analysis provides important insight into the multiscale stochastic realization problem. ...

  4. Extreme sunbathing: Three weeks of small total O3 columns and high UV radiation over the southern tip of South America

    E-Print Network [OSTI]

    Haak, Hein

    Click Here for Full Article Extreme sunbathing: Three weeks of small total O3 columns and high UV measurements of total O3 columns and the UV index of a unique event during the 2009 Antarctic O3 hole season total O3 column and UV index measurements shows that this 20day event was unique in the history

  5. Higher-degree linear approximations of nonlinear systems

    SciTech Connect (OSTI)

    Karahan, S.

    1989-01-01

    In this dissertation, the author develops a new method for obtaining higher degree linear approximations of nonlinear control systems. The standard approach in the analysis and synthesis of nonlinear systems is a first order approximation by a linear model. This is usually performed by obtaining a series expansion of the system at some nominal operating point and retaining only the first degree terms in the series. The accuracy of this approximation depends on how far the system moves away from the normal point, and on the relative magnitudes of the higher degree terms in the series expansion. The approximation is achieved by finding an appropriate nonlinear coordinate transformation-feedback pair to perform the higher degree linearization. With the proposed method, one can improve the accuracy of the approximation up to arbitrarily higher degrees, provided certain solvability conditions are satisfied. The Hunt-Su linearizability theorem makes these conditions precise. This approach is similar to Poincare's Normal Form Theorem in formulation, but different in its solution method. After some mathematical background the author derives a set of equations (called the Homological Equations). A solution to this system of linear equations is equivalent to the solution to the problem of approximate linearization. However, it is generally not possible to solve the system of equations exactly. He outlines a method for systematically finding approximate solutions to these equations using singular value decomposition, while minimizing an error with respect to some defined norm.

  6. Grid-Independent Cooperative Microgrid Networks with High Renewable Penetration

    E-Print Network [OSTI]

    Kundur, Deepa

    Grid-Independent Cooperative Microgrid Networks with High Renewable Penetration Eman M. Hammad, Toronto, Ontario, Canada Email: {ehammad, abdallah, dkundur}@ece.utoronto.ca Abstract--Microgrids (MG framework for cooperation amongst a set of grid-independent microgrids to improve the overall microgrid

  7. Utility maximization in models with conditionally independent increments

    E-Print Network [OSTI]

    Kallsen, Jan

    Utility maximization in models with conditionally independent increments Jan Kallsen Johannes Muhle-Karbe Abstract We consider the problem of maximizing expected utility from terminal wealth in models for power utility under the assumption that the increments of the asset price are independent conditionally

  8. Language Independence and Language Tolerance in Logic Programs

    E-Print Network [OSTI]

    Turner, Hudson

    Language Independence and Language Tolerance in Logic Programs Norman McCain and Hudson Turner of a logic program depend in general upon both the rules of the program and its language. However of the program in only a restricted way. In this paper, we de ne notions of language independence and language

  9. Micro-Architecture Independent Analytical Processor Performance and Power Modeling

    E-Print Network [OSTI]

    Eeckhout, Lieven

    Micro-Architecture Independent Analytical Processor Performance and Power Modeling Sam Van den models that allow us to produce performance and power estimates across a large design space almost models. In this work we present a micro-architecture independent profiler and associated analytical

  10. Mycle Schneider Consulting Independent Analysis on Energy and Nuclear Policy

    E-Print Network [OSTI]

    Laughlin, Robert B.

    Mycle Schneider Consulting Independent Analysis on Energy and Nuclear Policy 45, allée des deux Mycle Schneider International Consultant on Energy and Nuclear Policy Paris, May 2009 This research the Author Mycle Schneider works as independent international energy nuclear policy consultant. Between 1983

  11. The University of Oklahoma Independent Contractor or Consultant Guidelines

    E-Print Network [OSTI]

    Oklahoma, University of

    The University of Oklahoma Independent Contractor or Consultant Guidelines Purpose .................................................................................. 7 #12;University of Oklahoma Independent Contractor Guidelines - (Revised 11/2012) pg. 2 Purpose) for the University of Oklahoma and is the result of collaboration between Human Resources and Financial Services

  12. Fresnel: A Browser-Independent Presentation Vocabulary for RDF

    E-Print Network [OSTI]

    Boyer, Edmond

    Fresnel: A Browser-Independent Presentation Vocabulary for RDF Emmanuel Pietriga1 , Christian Bizer knowledge, we designed Fresnel as a browser-independent vocabulary of core RDF display con- cepts. In this paper we describe Fresnel's main concepts and present several RDF browsers and visualization tools

  13. Independent Coding of Wind Direction in Cockroach Giant Interneurons

    E-Print Network [OSTI]

    Libersat, Frederic

    Independent Coding of Wind Direction in Cockroach Giant Interneurons ADI MIZRAHI AND FREDERIC of the Negev, Beer Sheva 84105, Israel Mizrahi, Adi and Frederic Libersat. Independent coding of wind soma-to-cell interactions in the localization processing of a wind of three pairs of bilateral cells. The vGIs (GI1

  14. Independent Control of Multiple Magnetic Microrobots in Three Dimensions

    E-Print Network [OSTI]

    Sitti, Metin

    Independent Control of Multiple Magnetic Microrobots in Three Dimensions Eric Diller, Joshua method to independently control multiple sub-mm microrobots in three dimen- sions (3D) using magnetic of geometrically or magnetically distinct microrobots which assume different magnetization directions in a rotating

  15. HEXAHYDRO-1,3,5-TRINITRO-1,3,5-TRIAZINE (RDX) DEGRADATION IN BIOLOGICALLY-ACTIVE IRON COLUMNS

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    by indigenous microorganisms, and a third column was amended with anaerobic sludge to evaluate the benefits-chemical and biological processes have been proposed to manage RDX contamination (e.g., incineration, composting, alkaline

  16. The local potential approximation in the background field formalism

    E-Print Network [OSTI]

    I. Hamzaan Bridle; Juergen A. Dietz; Tim R. Morris

    2014-03-20

    Working within the familiar local potential approximation, and concentrating on the example of a single scalar field in three dimensions, we show that the commonly used approximation method of identifying the total and background fields, leads to pathologies in the resulting fixed point structure and the associated spaces of eigenoperators. We then show how a consistent treatment of the background field through the corresponding modified shift Ward identity, can cure these pathologies, restoring universality of physical quantities with respect to the choice of dependence on the background field, even within the local potential approximation. Along the way we point out similarities to what has been previously found in the f(R) approximation in asymptotic safety for gravity.

  17. The WKB approximation for a linear potential and ceiling 

    E-Print Network [OSTI]

    Zapata, Todd Austin

    2009-05-15

    The physical problem this thesis deals with is a quantum system with linear potential driving a particle away from a ceiling (impenetrable barrier). This thesis will construct the WKB approximation of the quantum mechanical propagator...

  18. Mean Field Variational Approximations in Continuous-Time Markov Processes

    E-Print Network [OSTI]

    Friedman, Nir

    Mean Field Variational Approximations in Continuous-Time Markov Processes A thesis submitted Processes . . . . . . . . . . . . . . . . . . . 18 2.3 Continuous Time Markov Processes-component Representation - Continuous Time Bayesian Networks . 24 2.3.3 Inference in Continuous Time Markov Processes

  19. Numerical Approximations of Stochastic Optimal Stopping and Control Problems 

    E-Print Network [OSTI]

    Siska, David

    2007-01-01

    We study numerical approximations for the payoff function of the stochastic optimal stopping and control problem. It is known that the payoff function of the optimal stopping and control problem corresponds to the solution ...

  20. Approximate translation : media, narrative, and experience in urban design

    E-Print Network [OSTI]

    Crisman, Jonathan

    2013-01-01

    Approximate translation is developed as a design process through which the place-embedded history of an urban environment can be understood, allowing for better design and intervention in that urban environment. Generally, ...

  1. Tractability through approximation : a study of two discrete optimization problems

    E-Print Network [OSTI]

    Farahat, Amr, 1973-

    2004-01-01

    (cont.) algorithm, at one extreme, and complete enumeration, at the other extreme. We derive worst-case approximation guarantees on the solution produced by such an algorithm for matroids. We then define a continuous ...

  2. Queueing systems subject to random server failures: an approximation 

    E-Print Network [OSTI]

    Matis, Timothy

    1998-01-01

    research into finding exact or approximate methods that adjust key performance measures of a system to reflect server failures. Many of the methods that have been developed suffer either from a high degree of computational complexity or from tight...

  3. APPROXIMATING SPECTRAL INVARIANTS OF HARPER OPERATORS ON GRAPHS II

    E-Print Network [OSTI]

    Schick, Thomas

    APPROXIMATING SPECTRAL INVARIANTS OF HARPER OPERATORS ON GRAPHS II VARGHESE MATHAI, THOMAS SCHICK;2 VARGHESE MATHAI, THOMAS SCHICK, AND STUART YATES subset E+ of these edges in which each combinatorial edge

  4. Approximate dynamic programming with applications in multi-agent systems

    E-Print Network [OSTI]

    Valenti, Mario J. (Mario James), 1976-

    2007-01-01

    This thesis presents the development and implementation of approximate dynamic programming methods used to manage multi-agent systems. The purpose of this thesis is to develop an architectural framework and theoretical ...

  5. Approximate Description of the Mandelbrot Set. Thermodynamic Analogy

    E-Print Network [OSTI]

    O. B. Isaeva; S. P. Kuznetsov

    2005-04-29

    Analogy between an approximate version of Feigenbaum renormalization group analysis in complex domain and the phase transition theory of Yang-Lee (based on consideration of formally complexified thermodynamic values) is discussed. It is shown that the Julia sets of the renormalization transformation correspond to the approximation of Mandelbrot set of the original map. New aspects of analogy between the theory of dynamical systems and the phase transition theory are uncovered.

  6. Resonant-state expansion Born Approximation applied to Schrodinger's Equation

    E-Print Network [OSTI]

    Doost, M B

    2015-01-01

    The RSE Born Approximation is a new scattering formula in Physics, it allows the calculation of strong scattering via the Fourier transform of the scattering potential and Resonant-states. In this paper I apply the RSE Born Approximation to Schr\\"odinger's Equation. The resonant-states of the system can be calculated using the recently discovered RSE perturbation theory and normalised correctly to appear in spectral Green's functions via the flux volume normalisation.

  7. Mean field approximation for noisy delay coupled excitable neurons

    E-Print Network [OSTI]

    Nikola Buric; Dragana Rankovic; Kristina Todorovic; Nebojsa Vasovic

    2010-03-26

    Mean field approximation of a large collection of FitzHugh-Nagumo excitable neurons with noise and all-to-all coupling with explicit time-delays, modelled by $N\\gg 1$ stochastic delay-differential equations is derived. The resulting approximation contains only two deterministic delay-differential equations but provides excellent predictions concerning the stability and bifurcations of the averaged global variables of the exact large system.

  8. Independent SOC 3 Report for the Security and Availability Trust Principle for Microsoft GFS 1 Independent Service

    E-Print Network [OSTI]

    Chaudhuri, Surajit

    Independent SOC 3 Report for the Security and Availability Trust Principle for Microsoft GFS 1 Report for the Security and Availability Trust Principle for Microsoft GFS 2 Independent Service Auditor and availability of the GFS Information Technology Infrastructure and Services during the period October 1, 2012

  9. Linear Time Approximation Schemes for the Gale-Berlekamp Game and Related

    E-Print Network [OSTI]

    Behnke, Sven

    by m grid of lightbulbs. The adversary chooses an arbitrary subset of the lightbulbs to be initially "on." Next to every row (resp. column) of lightbulbs is a switch, which can be used to invert the state of every lightbulb in that row (resp. column). The protagonist's task is to minimize the number

  10. Recovery of coal from preparation plant effluents using a packed column

    SciTech Connect (OSTI)

    Choudhry, V.; Khan, L.; Yang, D.; Banerjee, D.D.

    1993-12-31

    The feasibility of recovering coal from coal preparation plant waste (or effluent) streams at the pilot scale using the packed column flotation process is demonstrated. In Phase I of the project, a total of four effluent samples were tested at the bench scale with the objective of recovering low-ash, low-sulfur clean coal products that were, at a minimum, compatible with the quality of the clean coal produced by the preparation plants supplying the waste stream samples. Phase II of the project comprised demonstration of the technology at the pilot scale using a 4-in. I.D. {times} 20-ft tall column installed at the Applied Laboratory of the Illinois State Geological Survey. A large effluent sample was conducted, consisting of particle size distribution, proximate and complete analyses, and batch froth flotation testing. Ash, total and pyritic sulfur, and calorific value of the effluent sample were also determined. The effluent feed sample contained 50-55% ash and 2.2% total sulfur. Confirmatory tests were conducted at Michigan Technological University using a bench-scale packed column. A product containing 5.4% ash was obtained at 97.5% ash rejection and 71.8% combustible matter recovery. Changing the process operating parameters allowed the quality of the product to be controlled such that its ash content ranged between 6 and 10%, with combustible matter recoveries in the 71-77% range. Pilot testing was conducted using a test matrix designed to study the effects of primary variables (feed rate, percent solids, and reagent dosage) and operating variables (air rate, wash water, and pulp level) with the objective of optimizing the process performance. Feed rates of 20-108 lb/hour were tested, with very good performance being obtained at a feed rate of 32 lb/hour (374 lb/h/ft{sup 2}).

  11. Choosing the Summary Statistics and the Acceptance Rate in Approximate Bayesian

    E-Print Network [OSTI]

    Blum, Michael G. B.

    Choosing the Summary Statistics and the Acceptance Rate in Approximate Bayesian Computation or not. In this paper, I incorporate Approximate Bayesian Computation into a local Bayesian regression Computation, evidence approximation, empirical Bayes, Bayesian local regression 1 Introduction Approximate

  12. The effect of distributors on two-phase and three-phase flows in vertical columns 

    E-Print Network [OSTI]

    Ouyang, Chie-Jan Paul

    1982-01-01

    ) - U1C (1 - E'g)/6'1 where g is the void fraction. For two-phase flow, the area fractions are related by equation 4. Substituting equation 4 into equation 3, the reduced form f' or the drift flux is obtained, Vd ? U (1- 6 ) ? Ulg The drift flux... appropriate: THE EFFECT OF DISTRIBUTORS ON TWO-PHASE AND THREE-PHASE FLOWS IN VERTICAL COLUMNS A Thesis by CHIE-JAN PAUL OUYANG Approved as to sty1e and content by: Chairm of Committee Member M mber Head of Dep rtment May 1982 ABS TRACT The Effect...

  13. ARM - Field Campaign - Two-Column Aerosol Project (TCAP): Airborne HSRL and

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column ModelRSP Measurements

  14. ARM - Field Campaign - Two-Column Aerosol Project (TCAP): Ground-Based

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column ModelRSP MeasurementsRadiation and Aerosol

  15. ARM - Field Campaign - Two-Column Aerosol Project (TCAP): Winter Aerosol

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode DesigngovCampaignsSpring Single Column ModelRSP MeasurementsRadiation and

  16. Small Column Ion Exchange Technology at Savannah River Site | Department of

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergy Small Column Ion Exchange Technology

  17. Small Column Ion Exchange at Savannah River Site Technology Readiness Assessment Report

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergy Small Column Ion Exchange

  18. Quantum Correlations of Helicity Entangled States in Non-inertial Frames Beyond Single Mode Approximation

    E-Print Network [OSTI]

    Zeynab Harsij; Behrouz Mirza

    2014-09-24

    A helicity entangled tripartite state is considered in which the degree of entanglement is preserved in non-inertial frames. It is shown that Quantum Entanglement remains observer independent. As another measure of quantum correlation, Quantum Discord has been investigated. It is explicitly shown that acceleration has no effect on the degree of quantum correlation for the bipartite and tripartite helicity entangled states. Geometric Quantum Discord as a Hilbert-Schmidt distance is computed for helicity entangled states. It is shown that living in non-inertial frames does not make any influence on this distance, either. In addition, the analysis has been extended beyond single mode approximation to show that acceleration does not have any impact on the quantum features in the limit beyond the single mode. As an interesting result, while the density matrix depends on the right and left Unruh modes, the Negativity as a measure of Quantum Entanglement remains constant. Also, Quantum Discord does not change beyond single mode approximation.

  19. An Independent Evaluation of Safety Culture at the U.S. Department...

    Office of Environmental Management (EM)

    Environmental Management Headquarters - November 2012 Independent Oversight Assessment, Salt Waste Processing Facility Project - January 2013 Independent Oversight Assessment, Y-12...

  20. Independence of some polynomial statistics and of the sample mean

    E-Print Network [OSTI]

    2005-01-07

    polynomial statistics, Pl(x) and P2(x)~ can be independent random variables. When one of the statistics is linear, the general method of solving such problems is ...

  1. Independent External Evaluation of The Columbia Basin Water Transactions Program

    E-Print Network [OSTI]

    Independent External Evaluation of The Columbia Basin Water Transactions Program (2003 of Water Transactions...............................................32 Program Administration......................................................................................................45 Annex 1: Evaluation Matrix Annex 2: Limiting Factors to Water Transactions in the Columbia Basin

  2. Do Independent Directors Cause Improvements in Firm Transparency?

    E-Print Network [OSTI]

    Armstrong, Christopher S.

    Although recent research documents a positive relation between corporate transparency and the proportion of independent directors, the direction of causality is unclear. We examine a regulatory shock that substantially ...

  3. Platform-independent method for computer aided schematic drawings

    DOE Patents [OSTI]

    Vell, Jeffrey L. (Slingerlands, NY); Siganporia, Darius M. (Clifton Park, NY); Levy, Arthur J. (Fort Lauderdale, FL)

    2012-02-14

    A CAD/CAM method is disclosed for a computer system to capture and interchange schematic drawing and associated design information. The schematic drawing and design information are stored in an extensible, platform-independent format.

  4. New Mexico Institute of Mining and Masters Independent Study

    E-Print Network [OSTI]

    Borchers, Brian

    New Mexico Institute of Mining and Technology Masters Independent Study Estimation Methods is the only choice you have." Bob Marley #12;NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY Abstract Jan

  5. Are independent directors effective in lowering earnings management in China? 

    E-Print Network [OSTI]

    Lai, Liona Hoi Yan

    2006-10-30

    This study examines whether board independence is an effective corporate governance mechanism in reducing earnings management in China, a country with significantly different institutional and legal characteristics from the Anglo-Saxon countries. I...

  6. Independent Oversight Review, Hanford Site K-West Annex Facility...

    Energy Savers [EERE]

    Review, Hanford Site K-West Annex Facility - April 2014 Independent Oversight Review, Hanford Site K-West Annex Facility - April 2014 April 2014 Review of the Hanford Site K-West...

  7. Security and Emergency Management Independent Oversight and Performance Assurance Program

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2000-03-01

    Establishes the DOE Security and Emergency Management Independent Oversight and Performance Assurance Program. Cancels DOE O 470.2, Paragraph 5b(2) of DOE O 231.1 and Chapter IV of DOE M 231.1-1.

  8. Microsoft Word - Results_of_the_Independent_Hanford_Traffic_Safety...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2010 To: ALL HANFORD EMPLOYEES Subject: RESULTS OF INDEPENDENT HANFORD TRAFFIC SAFETY STUDY AND NEXT STEPS One of the most hazardous situations that most of us face each day is...

  9. Board independence and corporate governance: evidence from director resignations 

    E-Print Network [OSTI]

    Gupta, Manu

    2005-08-29

    ) May 2005 Major Subject: Finance iii ABSTRACT Board Independence and Corporate Governance: Evidence from Director Resignations. (May 2005) Manu Gupta, B.E., South Gujarat University; M.I.B., Indian Institute of Foreign Trade Chair...

  10. Variational principles with Padé approximants for tearing mode analysis

    SciTech Connect (OSTI)

    Cole, Andrew J.; Finn, John M.

    2014-03-15

    Tearing modes occur in several distinct physical regimes, and it is often important to compute the inner layer response for these modes with various effects. There is a need for an approximate and efficient method of solving the inner layer equations in all these regimes. In this paper, we introduce a method of solving the inner layer equations based on using a variational principle with Padé approximants. For all the regimes considered, the main layer equations to be solved are inhomogeneous, and Padé approximants give a convenient and efficient method of satisfying the correct asymptotic behavior at the edge of the layer. Results using this variational principle—Padé approximant method in three of these regimes is presented. These regimes are the constant-? resistive-inertial (RI) regime, the constant-? viscoresistive regime, and the non-constant-? inviscid tearing regime. The last regime includes the constant-? RI regime and the inertial regime. The results show that reasonable accuracy can be obtained very efficiently with Padé approximants having a small number of parameters.

  11. Analysis of microwave leaky modes propagating through laser plasma filaments column waveguide

    SciTech Connect (OSTI)

    Alshershby, Mostafa; Hao Zuoqiang; Lin Jingquan [School of Science, Changchun University of Science and Technology, Changchun 130022 (China)

    2012-12-15

    A plasma column waveguide formed by a bundle of closely spaced plasma filaments induced by the propagation of ultrafast laser pulses in air and revived by a longer infrared laser pulse is shown to support microwave radiation. We consider values of both the plasma electron density and microwave frequency for which the refractive index of plasma is lower than the refractive index of air; therefore, a leaky plasma waveguide can be realized in extremely high frequency band. The guiding mechanism does not require high conductance of the plasma and can be easily excited by using commercial femtosecond laser sources. A theoretical study of leaky mode characteristics of isotropic and homogeneous plasma column waveguides is investigated with several values of plasma and waveguide structure parameters. The microwave transmission loss was found to be mainly caused by the microwave leakage through the air-plasma interface and is weakly dependent on the plasma absorption. In spite of losses of microwaves caused by leakage and plasma absorption, it is shown to be much lower than both that accompanying to surface waves attaching to single conducting plasma wire and the free space propagation over distances in the order of the filament length, which opens exciting perspectives for short distance point to point wireless transmission of pulsed-modulated microwaves.

  12. PLUTONIUM LOADING CAPACITY OF REILLEX HPQ ANION EXCHANGE COLUMN - AFS-2 PLUTONIUM FLOWSHEET FOR MOX

    SciTech Connect (OSTI)

    Kyser, E.; King, W.; O'Rourke, P.

    2012-07-26

    Radioactive plutonium (Pu) anion exchange column experiments using scaled HB-Line designs were performed to investigate the dependence of column loading performance on the feed composition in the H-Canyon dissolution process for plutonium oxide (PuO{sub 2}) product shipped to the Mixed Oxide (MOX) Fuel Fabrication Facility (MFFF). These loading experiments show that a representative feed solution containing {approx}5 g Pu/L can be loaded onto Reillex{trademark} HPQ resin from solutions containing 8 M total nitrate and 0.1 M KF provided that the F is complexed with Al to an [Al]/[F] molar ratio range of 1.5-2.0. Lower concentrations of total nitrate and [Al]/[F] molar ratios may still have acceptable performance but were not tested in this study. Loading and washing Pu losses should be relatively low (<1%) for resin loading of up to 60 g Pu/L. Loading above 60 g Pu/L resin is possible, but Pu wash losses will increase such that 10-20% of the additional Pu fed may not be retained by the resin as the resin loading approaches 80 g Pu/L resin.

  13. Medical transcription services: the use of independent contractors 

    E-Print Network [OSTI]

    Reyna, Cara Joanne

    2013-02-22

    determines independent 11 contractor status through the application of these factors. In the IRS Letter Ruling 9129011, the IRS ruled that a writer who wrote free-lance articles for a magazine was an independent contractor (Stalnaker 1993). The firm... policy against employees doing free-lance work during the firm's normal working hours (Stalnaker 1993). In addition to this stipulation, the firm stated that free- lance work should not take precedence over any requests for overtime that a worker...

  14. Non-local fractional model of rate independent plasticity

    E-Print Network [OSTI]

    Wojciech Sumelka

    2013-09-14

    In the paper the generalisation of classical rate independent plasticity using fractional calculus is presented. This new formulation is non-local due to properties of applied fractional differential operator during definition of kinematics. In the description small fractional strains assumption is hold together with additive decomposition of total fractional strains into elastic and plastic parts. Classical local rate independent plasticity is recovered as a special case.

  15. Approximating the Probability of an Itemset being Nele Dexters

    E-Print Network [OSTI]

    Antwerpen, Universiteit

    , Middelheimlaan 1, 2020 Antwerp, Belgium nele.dexters@ua.ac.be Abstract. The frequent itemset mining (FIM) problem is a well-known and im- portant data mining problem, that has been studied in considerable depth during the items and all the transactions are independent. 1 Introduction The frequent itemset mining (FIM) problem

  16. On Spectral Approximations In Elliptical Geometries Using Mathieu ...

    E-Print Network [OSTI]

    2008-07-11

    Jul 10, 2008 ... admits two families of linearly independent periodic solutions ... Matlab programs for manipulating Mathieu functions is also available (cf. [33]). For the Helmholtz equation (2.2), the wave number k > 0 so the parameter ...... Finite element analysis of acoustic scattering, volume 132 of Applied Math- ematical ...

  17. Trigonometric Pade approximants for functions with regularly decreasing Fourier coefficients

    SciTech Connect (OSTI)

    Labych, Yuliya A; Starovoitov, Alexander P [Gomel State University, Gomel (Belarus)

    2009-08-31

    Sufficient conditions describing the regular decrease of the coefficients of a Fourier series f(x)=a{sub 0}/2 + {sigma} a{sub n} cos kx are found which ensure that the trigonometric Pade approximants {pi}{sup t}{sub n,m}(x;f) converge to the function f in the uniform norm at a rate which coincides asymptotically with the highest possible one. The results obtained are applied to problems dealing with finding sharp constants for rational approximations. Bibliography: 31 titles.

  18. L^p Bernstein Inequalities and Radial Basis Function Approximation 

    E-Print Network [OSTI]

    Ward, John P.

    2012-10-19

    are bounded in terms of certain measurements of the set X. The error of approximation will typically be given in terms of the ll distance hX = sup x2Rd inf 2X jjx jj2 ; which measures how far a point in Rd can be from X, and the stability of the ap... will typically be restricted to sets X for which hX is comparable to qX , and sets for which the mesh ratio X := hX=qX is bounded by a constant will be called quasi-uniform. In this paper, we will only consider approximation spaces SX( ) where X is quasi...

  19. On the approximation of crack shapes found during inservice inspection

    SciTech Connect (OSTI)

    Bhate, S.R.; Chawla, D.S.; Kushwaha, H.S. [Bhabha Atomic Research Centre, Bombay (India)] [and others

    1997-04-01

    This paper addresses the characterization of axial internal flaw found during inservice inspection of a pipe. J-integral distribution for various flaw shapes is obtained using line spring finite, element method. The peak J-value and its distribution across the crack is found to be characteristic feature of each shape. The triangular shape yields peak J-value away from the center, the point of depth. The elliptic approximation results in large overestimate of J-value for unsymmetric flaws. Triangular approximation is recommended for such flaws so that further service can be obtained from the component.

  20. Independent Component Analysis of Microarray Data in the Study of Endometrial (Brief Title: Independent Component Analysis for Gene Arrays)

    E-Print Network [OSTI]

    Kreil, David

    (Brief Title: Independent Component Analysis for Gene Arrays) Samir A. Saidi1 , Cathrine M. Holland4 of Cambridge, Cambridge, CB1 1QP, UK Corresponding author: Samir A Saidi University Department of Obstetrics