Sample records for accumulated cyclone energy

  1. Prediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH

    E-Print Network [OSTI]

    Gray, William

    cyclone (NTC) activity (Gray et al. 1994) and accumulated cyclone energy (ACE; Bell et al. 2000) duringPrediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH-Interim) and explain over 60% of the cross-validated variance in post­30 June accumulated cyclone energy over

  2. SUMMARY OF 2011 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHOR'S SEASONAL AND TWO-WEEK FORECASTS

    E-Print Network [OSTI]

    .50 Accumulated Cyclone Energy (ACE) (96.2) 165 160 160 160 125 Net Tropical Cyclone Activity (NTC) (100%) 180 175 such as Net Tropical Cyclone (NTC) activity and Accumulated Cyclone Energy (ACE) were at somewhat above activity. 3 #12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACE) - A measure of a named storm

  3. SUMMARY OF 2014 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHORS' SEASONAL AND TWO-WEEK FORECASTS

    E-Print Network [OSTI]

    Schumacher, Russ

    .0) 1 1 1 1 2 100% Major Hurricane Days (MHD) (3.9) 2 3 3 3 3.50 90% Accumulated Cyclone Energy (ACE measures such as Accumulated Cyclone Energy (ACE) and Net Tropical Cyclone (NTC) activity. We issued six. Integrated measures such as Net Tropical Cyclone (NTC) activity and Accumulated Cyclone Energy (ACE) were

  4. Atmospheric circulation and cyclone frequency variations linked to the primary modes of Greenland snow accumulation

    E-Print Network [OSTI]

    Howat, Ian M.

    Atmospheric circulation and cyclone frequency variations linked to the primary modes of Greenland from 34 Greenland firn cores, extending from 1982 to 1996, are used to identify spatial accumulation component, representing west-central Greenland accumulation, is correlated to NAO variability, having

  5. Cyclone Power Technologies Inc | Open Energy Information

    Open Energy Info (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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs and HeatOpenInformationInformationCyclone

  6. An empirical framework for tropical cyclone climatology Nam-Young Kang James B. Elsner

    E-Print Network [OSTI]

    Elsner, James B.

    on defining activity with indices like the Accumulated Cyclone Energy (ACE) and Power Dissipation Index (PDI used exponent indices like accumulated cyclone energy, it does not contain cyclone duration. EmpiricalAn empirical framework for tropical cyclone climatology Nam-Young Kang · James B. Elsner Received

  7. SUMMARY OF 2012 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHORS' SEASONAL AND TWO-WEEK FORECASTS

    E-Print Network [OSTI]

    Gray, William

    (MHD) (3.9) 3 4 5 0.25 6% Accumulated Cyclone Energy (ACE) (92) 70 80 99 129 140% Net Tropical Cyclone Cyclone Energy (ACE) were at above-average levels. Most hurricane activity in 2012 was concentrated of the season in the Caribbean. Integrated measures such as Net Tropical Cyclone (NTC) activity and Accumulated

  8. SUMMARY OF 2007 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHOR'S SEASONAL AND MONTHLY FORECASTS

    E-Print Network [OSTI]

    Gray, William

    10 12.25 8 5.75 Accumulated Cyclone Energy (ACE) (96.2) 130 170 170 150 148 100 68 Net Tropical't press us too hard on future events!!" 3 #12;DEFINITIONS Accumulated Cyclone Energy ­ (ACE) A measureSUMMARY OF 2007 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHOR'S SEASONAL

  9. SUMMARY OF 2009 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHOR'S SEASONAL AND 15-DAY FORECASTS

    E-Print Network [OSTI]

    Gray, William

    , hurricanes and major hurricanes, respectively. 3 #12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACE Energy (ACE) (96.2) 125 100 85 80 50 Net Tropical Cyclone Activity (NTC) (100%) 135 105 90 85 66 Figure.25 Major Hurricanes (MH) (2.3) 3 2 2 2 2 Major Hurricane Days (MHD) (5.0) 7 5 4 4 3.25 Accumulated Cyclone

  10. SUMMARY OF 2013 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHORS' SEASONAL AND TWO-WEEK FORECASTS

    E-Print Network [OSTI]

    . In addition, Accumulated Cyclone Energy (ACE) was the lowest that has been observed since 1983. This year Cyclone Energy (ACE) (92) 165 165 142 30 32% Net Tropical Cyclone Activity (NTC) (103%) 175 175 150 43 42SUMMARY OF 2013 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHORS' SEASONAL AND TWO

  11. Environmental Factors Affecting Tropical Cyclone Power Dissipation KERRY EMANUEL

    E-Print Network [OSTI]

    Emanuel, Kerry A.

    - son 1974; Webster et al. 2005), and the Accumulated Cyclone Energy (ACE) index (Bell et al. 2000, the PDI is also accumulated over each year. Annually accumulated integral metrics such as ACE and PDI showEnvironmental Factors Affecting Tropical Cyclone Power Dissipation KERRY EMANUEL Program

  12. SUMMARY OF 2010 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHOR'S SEASONAL AND TWO-WEEK FORECASTS

    E-Print Network [OSTI]

    Birner, Thomas

    .3) 3-5 4 5 5 5 Major Hurricane Days (MHD) (5.0) 6-12 10 13 13 11 Accumulated Cyclone Energy (ACE) (96, hurricanes and major hurricanes, respectively. 3 #12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACESUMMARY OF 2010 ATLANTIC TROPICAL CYCLONE ACTIVITY AND VERIFICATION OF AUTHOR'S SEASONAL AND TWO

  13. Western North Pacific Tropical Cyclone Intensity and ENSO SUZANA J. CAMARGO

    E-Print Network [OSTI]

    Sobel, Adam

    intensity in the western North Pacific basin is examined. Accumulated cyclone energy (ACE), constructed from cyclones that are both more intense and longer-lived than in La Niña years. ACE leads ENSO indices: duringWestern North Pacific Tropical Cyclone Intensity and ENSO SUZANA J. CAMARGO International Research

  14. Influence of Western North Pacific Tropical Cyclones on Their Large-Scale Environment

    E-Print Network [OSTI]

    Sobel, Adam

    water vapor, and sea surface tem- perature (SST)] on an index of TC activity [accumulated cyclone energyInfluence of Western North Pacific Tropical Cyclones on Their Large-Scale Environment ADAM H. SOBEL) tropical cyclones (TCs) on their large-scale environment by lag regressing various large-scale climate

  15. Co-variability of tropical cyclones in the North Atlantic and the eastern North Pacific

    E-Print Network [OSTI]

    Wang, Chunzai

    of accumulated cyclone energy (ACE) in the ENP. Therefore, we calculate the NA and ENP ACE indices by summingCo-variability of tropical cyclones in the North Atlantic and the eastern North Pacific Chunzai; published 30 December 2009. [1] In the Western Hemisphere, tropical cyclones (TCs) can form and develop

  16. aminobutyric acid accumulation: Topics by E-print Network

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

    Cr Paris-Sud XI, Universit de 202 Prediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH Geosciences Websites Summary: Prediction of...

  17. abscisic acid accumulation: Topics by E-print Network

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

    Cr Paris-Sud XI, Universit de 213 Prediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH Geosciences Websites Summary: Prediction of...

  18. acid accumulation limits: Topics by E-print Network

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

    Cr Paris-Sud XI, Universit de 293 Prediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH Geosciences Websites Summary: Prediction of...

  19. aortic cholesterol accumulation: Topics by E-print Network

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

    Cr Paris-Sud XI, Universit de 328 Prediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH Geosciences Websites Summary: Prediction of...

  20. Variability of tropical cyclone track density in the2 North Atlantic: Observations and high-resolution3

    E-Print Network [OSTI]

    Xie, Shang-Ping

    ; Emanuel 2005a)59 and the accumulated cyclone energy (ACE; Bell et al. 2000). Our focus here is on60 1 1 Variability of tropical cyclone track density in the2 North Atlantic: Observations #12; 2 Abstract23 24 Interannual-decadal variability of tropical cyclone (TC) track density

  1. annual tropical cyclone: Topics by E-print Network

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

    SEASONAL AND MONTHLY FORECASTS Geosciences Websites Summary: 10 12.25 8 5.75 Accumulated Cyclone Energy (ACE) (96.2) 130 170 170 150 148 100 68 Net Tropical't press us too hard on...

  2. Minimum Energy Accumulative Routing in Wireless Networks

    E-Print Network [OSTI]

    Sundaram, Ravi

    Minimum Energy Accumulative Routing in Wireless Networks Jiangzhuo Chen, Lujun Jia, Xin Liu to address the energy efficient routing problem in multi-hop wireless networks with accumulative relay. In the accumulative relay model, partially overheard signals of previous transmis- sions for the same packet are used

  3. Energy Efficient Routing with Mutual Information Accumulation

    E-Print Network [OSTI]

    Boyer, Edmond

    Energy Efficient Routing with Mutual Information Accumulation Tolga Girici, and Ahmet Cihat Kazez the use of ideal rateless codes, so that a node can accumulate transmission rates from the transmission compared with classical cooperative schemes that use energy accumulation. However, the resource allocation

  4. aortic 125i-albumin accumulation: Topics by E-print Network

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

    Cr Paris-Sud XI, Universit de 228 Prediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH Geosciences Websites Summary: Prediction of...

  5. Upper Oceanic Energy Response to Tropical Cyclone Passage JOHN A. KNAFF AND MARK DEMARIA

    E-Print Network [OSTI]

    Schubert, Wayne H.

    Upper Oceanic Energy Response to Tropical Cyclone Passage JOHN A. KNAFF AND MARK DEMARIA NOAA is investigated using a 6-yr daily record of data-driven analyses of two measures of upper ocean energy content information and the upper ocean response. Upper oceanic energy decreases in these metrics are shown to persist

  6. Routing with Mutual Information Accumulation in Energy-Limited Wireless Networks

    E-Print Network [OSTI]

    Uysal-Biyikoglu, Elif

    latency than classical energy accumulation techniques. The focus of this study is energy efficient design

  7. Energy budgets of Atlantic hurricanes and changes from 1970 Kevin E. Trenberth and John Fasullo

    E-Print Network [OSTI]

    Fasullo, John

    . NOAA's Accumulated Cyclone Energy (ACE) index [Levinson and Waple, 2004] approx- imates the collectiveEnergy budgets of Atlantic hurricanes and changes from 1970 Kevin E. Trenberth and John Fasullo of the current observational record of tropical cyclones and sea surface temperatures (SSTs) in the Atlantic

  8. Capital accumulation and non-renewable energy resources: a special functions case

    E-Print Network [OSTI]

    Nesterov, Yurii

    2007/9 Capital accumulation and non-renewable energy resources: a special functions case Agustin Pérez-Barahona #12;CORE DISCUSSION PAPER 2007/9 Capital accumulation and non-renewable energy resources the implications of assuming different technologies for physical capital accumulation and consumption. More

  9. Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone*

    E-Print Network [OSTI]

    Wang, Yuqing

    Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated is eventually dissipated due to surface friction. Since the energy production rate is a linear function while frictional dissipation rate balances the energy production rate near the radius of maximum wind (RMW

  10. Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone

    E-Print Network [OSTI]

    Wang, Yuqing

    0 Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated is eventually dissipated due to surface friction. Since the energy production rate is a linear function while frictional dissipation rate balances the energy production rate near the radius of maximum wind (RMW

  11. Cyclone Boiler Reburn NOx Control Improvements via Cyclone Design Improvements and Advanced Air Staging

    E-Print Network [OSTI]

    Morabito, B.; Nee, B.; Goff, V.; Maringo, G.

    2008-01-01T23:59:59.000Z

    Eastman Kodak owns three Babcock & Wilcox coal fired cyclone boilers and one Combustion Engineering pulverized coal boiler located at Kodak Park in Rochester, New York. Duke Energy Generation Services (DEGS) operates and maintains the steam...

  12. Power Outages Update: Post-Tropical Cyclone Sandy | Department of Energy

    Office of Environmental Management (EM)

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2 OPAM615_CostNSAR - T enAmount forDecontaminationCommentsNorth America

  13. Introduction In their recent review of tropical cyclones in the

    E-Print Network [OSTI]

    Nolan, David S.

    towers.As the relative humidity in the core exceeds values of 80 per cent over most of the depth in the efficiency of the conversion of latent heat energy to the kinetic energy of the cyclonic wind field

  14. Cyclone reduction of taconite. Final report

    SciTech Connect (OSTI)

    Taylor, P.R.; Bartlett, R.W.; Abdel-latif, M.A.; Hou, X.; Kumar, P. [College of Mines and Earth Resources, University of Idaho, Idaho Falls, ID (United States)

    1995-05-01T23:59:59.000Z

    A cyclone reactor system for the partial reduction and melting of taconite concentrate fines has been engineered, designed and operated. A non-transferred arc plasma torch was employed as a heat source. Taconite fines, carbon monoxide, and carbon dioxide were fed axially into the reactor, while the plasma gas was introduced tangentially into the cyclone. The average reactor temperature was maintained at above 1400{degrees}C, and reduction experiments were performed under various conditions. The influence of the following parameters on the reduction of taconite was investigated experimentally; carbon monoxide to carbon dioxide inlet feed ratio, carbon monoxide inlet partial pressure, and average reactor temperature. The interactions of the graphite lining with carbon dioxide and taconite were also studied. An attempt was made to characterize the flow behavior of the molten product within the cyclone. The results suggest that the system may approach a plug flow reactor, with little back mixing. Finally, a fundamental mathematical model was developed. The model describes the flow dynamics of gases and solid particles in a cyclone reactor, energy exchange, mass transfer, and the chemical kinetics associated with cyclone smelting of taconite concentrate fines. The influence of the various parameters on the reduction and melting of taconite particles was evaluated theoretically.

  15. DESIGN AND VALIDATION OF A HIGH ENERGY DENSITY ELASTIC ACCUMULATOR USING POLYURETHANE

    E-Print Network [OSTI]

    Barth, Eric J.

    steels and titanium alloys have a gravimetric energy density of around 1-1.5 kJ/kg [1]. ConsequentlyDESIGN AND VALIDATION OF A HIGH ENERGY DENSITY ELASTIC ACCUMULATOR USING POLYURETHANE Alexander-35%. However, the relatively low gravimetric and volumetric energy densities of conventional HAs prohibit

  16. Midlevel Ventilation's Constraint on Tropical Cyclone Intensity

    E-Print Network [OSTI]

    Tang, Brian Hong-An

    Midlevel ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hypothesized mechanism by which environmental vertical wind shear can constrain a tropical cyclones intensity. An ...

  17. Characterization of sampling cyclones

    E-Print Network [OSTI]

    Moore, Murray Edward

    1986-01-01T23:59:59.000Z

    Farland, who' provided an excellent opportunity for the enhancement of my engineering career. To Dr. Best for his patient snd competent assistance in this project. To Dr. Parish who gave his service to my graduate committee. To Bob DeOtte and Carlos Ortiz... in air sampling standards, several different samplers have been developed which utilize either inertial impaction or cyclonic flow fractionation techniques. For example, a 10 pm cutpoint size selective inlet was developed by McFarland, Ortiz...

  18. Special Supplement to the Bulletin of the American Meteorological Society

    E-Print Network [OSTI]

    Rodell, M; Chambers, D; Famiglietti, J S

    2012-01-01T23:59:59.000Z

    The total accumulated cyclone energy (ACE) in the 2011Accumulated Cyclone Energy were an additional seven unnamed tropical depressions (ACE)

  19. Evolution of Cyclone Characteristics The composite evolution of west and east Atlantic cyclone is likely to

    E-Print Network [OSTI]

    Dacre, Helen

    Evolution of Cyclone Characteristics The composite evolution of west and east Atlantic cyclone. The spatial distribution and evolution characteristics of North Atlantic cyclones. Mon. Wea. Rev. 137, 99 characteristics and the evolution of these characteristics are calculated in composite cyclones. Method Cyclones

  20. Tropical Cyclones and Climate Change

    E-Print Network [OSTI]

    Knutson, Thomas R.

    Whether the characteristics of tropical cyclones have changed or will change in a warming climate and if so, how has been the subject of considerable investigation, often with conflicting results. Large amplitude ...

  1. AN EXTRATROPICAL CYCLONE ATLAS A tool for illustrating cyclone structure and evolution characteristics

    E-Print Network [OSTI]

    Dacre, Helen

    1 AN EXTRATROPICAL CYCLONE ATLAS A tool for illustrating cyclone structure and evolution CYCLONE ATLAS A tool for illustrating cyclone structure and evolution characteristics BY H. F. DACRE, M. K in determining the day-to-day weather conditions in many parts of the world through their associated wind

  2. Modeling and control of an open accumulator Compressed Air Energy Storage (CAES) system for wind turbines q

    E-Print Network [OSTI]

    Li, Perry Y.

    Modeling and control of an open accumulator Compressed Air Energy Storage (CAES) system for wind compressed air energy storage. Maximizes energy production, levels load, downsizes electrical parts, meets Energy Storage (CAES) Load leveling Hydraulics Pneumatics Bandwidth limitation a b s t r a c t This paper

  3. A Ventilation Index for Tropical Cyclones

    E-Print Network [OSTI]

    Tang, Brian

    An important environmental control of both tropical cyclone intensity and genesis is vertical wind shear. One hypothesized pathway by which vertical shear affects tropical cyclones is midlevel ventilationor the flux of ...

  4. A study of bioaerosol sampling cyclones

    E-Print Network [OSTI]

    Moncla, Brandon Wayne

    2005-02-17T23:59:59.000Z

    A wetted wall cyclone using an airblast atomizer upstream of the inlet was designed as an improvement of a wetted wall cyclone developed by White et al. in 1975, which uses liquid injection through a port on the wall of ...

  5. Estimating tropical cyclone precipitation risk in Texas

    E-Print Network [OSTI]

    Zhu, Laiyin

    This paper uses a new rainfall algorithm to simulate the long-term tropical cyclone precipitation (TCP) climatology in Texas based on synthetic tropical cyclones generated from National Center for Atmospheric Research/National ...

  6. Pressure drop in cyclone separators commonly used in the agricultural processing industry

    E-Print Network [OSTI]

    Guzman, Francisco Alejandro

    1984-01-01T23:59:59.000Z

    -20, 406 mm diameter cyclone. 58 sion of kinetic energy into static and in some cases flow separation. A comparison between the static pressure at the piezometer ring and at the cyclone inlet as shown in Tables 7 and 8 (pp. 41 and 42) seemed... and so small in magnitude that for graphical purposes they were assumed to be zero. Examination of the static pressures in Tables 9 and 10 (pp. 43 and 44) suggested a regain of static pressure at the cyclone inlets. For instance, at an airflow rate...

  7. Cyclone shelters and cyclone resilient design in coastal areas of Bangladesh

    E-Print Network [OSTI]

    Jia, Zheng, M.C.P. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    Bangladesh is one of those countries that are most vulnerable to tropical cyclones. In recent decades, cyclone mitigations by the Government of Bangladesh and international organizations have greatly increased the coastal ...

  8. advanced cyclone processes: Topics by E-print Network

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

    Cyclone Genesis Potential Index (GPI) was employed to investigate possible impacts of global warming on tropical cyclone genesis over the western 6 ADVANCES IN ATMOSPHERIC...

  9. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2012

    E-Print Network [OSTI]

    ) (3.9) 3 4 Accumulated Cyclone Energy (ACE) (92) 70 80 Net Tropical Cyclone Activity (NTC) (103%) 75

  10. Design of wetted wall bioaerosol concentration cyclones

    E-Print Network [OSTI]

    Seo, Youngjin

    2009-05-15T23:59:59.000Z

    wall bioaerosol cyclone concentrators that consume very low power and are capable of delivering very small liquid effluent flow rate of highly-concentrated hydrosol. The aerosol-to-aerosol penetration cutpoint for the cyclones is about 1m. The aerosol...

  11. Groundwater and Terrestrial Water Storage,

    E-Print Network [OSTI]

    Rodell, M; Chambers, D P; Famiglietti, J S

    2011-01-01T23:59:59.000Z

    4.9. NOAAs Accumulated Cyclone Energy (ACE) Index in theF ig . 4.23 (a) Accumulated Cyclone Energy (ACE) In- dex perone TY). The accumulated cyclone energy (ACE) in the WNP (

  12. Temporal Specifications with Accumulative Values

    E-Print Network [OSTI]

    Boker, Udi

    Temporal Specifications with Accumulative Values Udi Boker, Krishnendu Chatterjee, Thomas A the accumulation of values along a computation. It is either the accumulated summation, as with the energy objectives, or the accumulated average, as with the mean-payoff objectives. We investigate the extension

  13. Cyclone oil shale retorting concept. [Use it all retorting process

    SciTech Connect (OSTI)

    Harak, A.E.; Little, W.E.; Faulders, C.R.

    1984-04-01T23:59:59.000Z

    A new concept for above-ground retorting of oil shale was disclosed by A.E. Harak in US Patent No. 4,340,463, dated July 20, 1982, and assigned to the US Department of Energy. This patent titled System for Utilizing Oil Shale Fines, describes a process wherein oil shale fines of one-half inch diameter and less are pyrolyzed in an entrained-flow reactor using hot gas from a cyclone combustor. Spent shale and supplemental fuel are burned at slagging conditions in this combustor. Because of fines utilization, the designation Use It All Retorting Process (UIARP) has been adopted. A preliminary process engineering design of the UIARP, analytical tests on six samples of raw oil shale, and a preliminary technical and economic evaluation of the process were performed. The results of these investigations are summarized in this report. The patent description is included. It was concluded that such changes as deleting air preheating in the slag quench and replacing the condenser with a quench-oil scrubber are recognized as being essential. The addition of an entrained flow raw shale preheater ahead of the cyclone retort is probably required, but final acceptance is felt to be contingent on some verification that adequate reaction time cannot be obtained with only the cyclone, or possibly some other twin-cyclone configuration. Sufficient raw shale preheating could probably be done more simply in another manner, perhaps in a screw conveyor shale transporting system. Results of the technical and economic evaluations of Jacobs Engineering indicate that further investigation of the UIARP is definitely worthwhile. The projected capital and operating costs are competitive with costs of other processes as long as electric power generation and sales are part of the processing facility.

  14. The Dynamics and Predictability of Tropical Cyclones

    E-Print Network [OSTI]

    Sippel, Jason A.

    2010-01-15T23:59:59.000Z

    Through methodology unique for tropical cyclones in peer-reviewed literature, this study explores how the dynamics of moist convection affects the predictability of tropical cyclogenesis. Mesoscale models are used to perform short-range ensemble...

  15. Midlevel ventilation's constraint on tropical cyclone intensity

    E-Print Network [OSTI]

    Tang, Brian Hong-An

    2010-01-01T23:59:59.000Z

    Midlevel ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hypothesized mechanism by which environmental vertical wind shear can constrain a TC's intensity. An idealized ...

  16. Tropical cyclone-ocea~ interactions Isaac Ginis

    E-Print Network [OSTI]

    Rhode Island, University of

    Hurricane Andrew in 1992 exceeded 60 with nearly $30 billion damage. Tropical cyclone modeling efforts over of hurricane track predictions over the last 30 years, in contrast there has been no perceptible improvement

  17. Cyclone analysis for the abatement of grain sorghum emmissions in granaries

    E-Print Network [OSTI]

    Avant, Robert V

    1976-01-01T23:59:59.000Z

    Incremental cones Dg Figure 7. Variable geometry cyclone ~ 28 Figure 8. 1D-1D cycione. Figure 9. 1D-2D cyc1one. 29 Figure 10. 1D-3D cyclone. 30 Figure 11. 2D-1D cyclone. Figure 12. 2D-2D cyclone. (Lapple cyclone) 32 Figure 13. 2D-3D cyclone... drop barrel by cone relationship 83 29 Pressure drop cone by barrel relationship 30. 1D-1D cyclone efficiencies 31. 1D-2D cyclone efficiencies 32. 2D-2D cyclone efficiencies 33. 2D-1D cyclone efficiencies 34. 3D-1D cyclone efficiencies 35. 3D-2D...

  18. Genetic Regulation of Grass Biomass Accumulation and Biological Conversion Quality (2013 DOE JGI Genomics of Energy and Environment 8th Annual User Meeting)

    SciTech Connect (OSTI)

    Hazen, Sam [University of Massachusetts

    2013-03-01T23:59:59.000Z

    Sam Hazen of the University of Massachusetts on "Genetic Regulation of Grass Biomass Accumulation and Biological Conversion Quality" at the 8th Annual Genomics of Energy & Environment Meeting on March 27, 2013 in Walnut Creek, Calif.

  19. Formal Type Soundness for Cyclone's Region System Dan Grossman

    E-Print Network [OSTI]

    Hicks, Michael

    collector. To support separate compilation, Cyclone requires programmers to write some explicit regionFormal Type Soundness for Cyclone's Region System Dan Grossman Greg Morrisett Trevor Jim Mike Hicks Yanling Wang James Cheney November 2001 Abstract Cyclone is a polymorphic, type-safe programming language

  20. The design of a pre-collector for cyclone collectors

    E-Print Network [OSTI]

    Mihalski, Karl Duane

    1996-01-01T23:59:59.000Z

    Tests were conducted on small laboratory scale ID-3D and 2D-2D cyclones to demonstrate the reduction in emission concentrations resulting when a pre-cyclone collector is used to collect large trash particles prior to cyclone fine dust collection...

  1. An improved wetted-wall bioaerosol sampling cyclone

    E-Print Network [OSTI]

    Phull, Manpreet Singh

    2006-10-30T23:59:59.000Z

    of the cyclone inlet. The new cyclone has a high aerosol sampling flow rate (1250 L/min) and maintains constant cut-point with the modified White-type cyclone along with greater collection efficiency, lower time response, and reduced pressure drop. The final air...

  2. The design of a pre-collector for cyclone collectors

    E-Print Network [OSTI]

    Mihalski, Karl Duane

    1996-01-01T23:59:59.000Z

    Tests were conducted on small laboratory scale ID-3D and 2D-2D cyclones to demonstrate the reduction in emission concentrations resulting when a pre-cyclone collector is used to collect large trash particles prior to cyclone fine dust collection...

  3. Wind Farms in Regions Exposed to Tropical Cyclones Niels-Erik Clausen1

    E-Print Network [OSTI]

    Wind Farms in Regions Exposed to Tropical Cyclones Niels-Erik Clausen1 , niels Energy A/S, A.C. Meyers Vnge 9, DK-2450 Copenhagen SV, Denmark, Phone +45 44 80 65 71 3 Tripod Wind 6001 Summary The present paper analyses the design basis of wind farms to be established in regions

  4. Observational Analysis of Cloud and Precipitation in Midlatitude Cyclones: Northern versus Southern Hemisphere Warm Fronts

    E-Print Network [OSTI]

    Satellite Observations (CALIPSO), and Advanced Microwave Scanning Radiometer for Earth Observing System Extratropical cyclones produce the bulk of the cold- season precipitation in middle and high latitudes and are key contributors to the meridional transport of energy between the equator and the poles. Though

  5. The Roles of an Expanding Wind Field and Inertial Stability in Tropical Cyclone Secondary Eyewall Formation

    E-Print Network [OSTI]

    Kossin, James P.

    of Mesoscale Severe Weather (MOE), Department of Atmospheric Sciences, Nanjing University, Nanjing, China and Forecasting Model (WRF) is used to simulate secondary eyewall formation (SEF) in a tropical cyclone (TC) on the b plane. The simulated SEF process is accompanied by an outward expansion of kinetic energy

  6. The Effect of Accumulation of Excess Energy of a Body in Gravitational Compression

    E-Print Network [OSTI]

    S. S. Gershtein; A. A. Logunov; M. A. Mestvirishvili

    2014-04-11T23:59:59.000Z

    It is shown that a gravitational compression of a spherical body results in an infinite growth of the energy of a body as its radius comes close to $GM/c^2$. This gives rise to a negative defect of mass and, due to an instability, to an expansion or to an explosion. A rigorous proof of the above statement can be obtained within the General Relativity in the harmonic coordinates.

  7. Cyclone separator having boundary layer turbulence control

    DOE Patents [OSTI]

    Krishna, Coimbatore R. (Mt. Sinai, NY); Milau, Julius S. (Port Jefferson, NY)

    1985-01-01T23:59:59.000Z

    A cyclone separator including boundary layer turbulence control that is operable to prevent undue build-up of particulate material at selected critical areas on the separator walls, by selectively varying the fluid pressure at those areas to maintain the momentum of the vortex, thereby preventing particulate material from inducing turbulence in the boundary layer of the vortical fluid flow through the separator.

  8. A study of bioaerosol sampling cyclones

    E-Print Network [OSTI]

    Moncla, Brandon Wayne

    2005-02-17T23:59:59.000Z

    for the White-type cyclone for single Bacillus globigii spores that have a particle size of about 1 m was approximately 81.8%. The aerosol-to-aerosol transmission efficiency for the AAC configuration was found to be approximately 50% for 1 m diameter particles...

  9. Evaluation of a Combined Cyclone and Gas Filtration System for Particulate Removal in the Gasification Process

    SciTech Connect (OSTI)

    Rizzo, Jeffrey J. [Phillips66 Company, West Terre Haute, IN (United States)

    2010-04-30T23:59:59.000Z

    The Wabash gasification facility, owned and operated by sgSolutions LLC, is one of the largest single train solid fuel gasification facilities in the world capable of transforming 2,000 tons per day of petroleum coke or 2,600 tons per day of bituminous coal into synthetic gas for electrical power generation. The Wabash plant utilizes Phillips66 proprietary E-Gas (TM) Gasification Process to convert solid fuels such as petroleum coke or coal into synthetic gas that is fed to a combined cycle combustion turbine power generation facility. During plant startup in 1995, reliability issues were realized in the gas filtration portion of the gasification process. To address these issues, a slipstream test unit was constructed at the Wabash facility to test various filter designs, materials and process conditions for potential reliability improvement. The char filtration slipstream unit provided a way of testing new materials, maintenance procedures, and process changes without the risk of stopping commercial production in the facility. It also greatly reduced maintenance expenditures associated with full scale testing in the commercial plant. This char filtration slipstream unit was installed with assistance from the United States Department of Energy (built under DOE Contract No. DE-FC26-97FT34158) and began initial testing in November of 1997. It has proven to be extremely beneficial in the advancement of the E-Gas (TM) char removal technology by accurately predicting filter behavior and potential failure mechanisms that would occur in the commercial process. After completing four (4) years of testing various filter types and configurations on numerous gasification feed stocks, a decision was made to investigate the economic and reliability effects of using a particulate removal gas cyclone upstream of the current gas filtration unit. A paper study had indicated that there was a real potential to lower both installed capital and operating costs by implementing a char cyclonefiltration hybrid unit in the E-Gas (TM) gasification process. These reductions would help to keep the E-Gas (TM) technology competitive among other coal-fired power generation technologies. The Wabash combined cyclone and gas filtration slipstream test program was developed to provide design information, equipment specification and process control parameters of a hybrid cyclone and candle filter particulate removal system in the E-Gas (TM) gasification process that would provide the optimum performance and reliability for future commercial use. The test program objectives were as follows: 1. Evaluate the use of various cyclone materials of construction; 2. Establish the optimal cyclone efficiency that provides stable long term gas filter operation; 3. Determine the particle size distribution of the char separated by both the cyclone and candle filters. This will provide insight into cyclone efficiency and potential future plant design; 4. Determine the optimum filter media size requirements for the cyclone-filtration hybrid unit; 5. Determine the appropriate char transfer rates for both the cyclone and filtration portions of the hybrid unit; 6. Develop operating procedures for the cyclone-filtration hybrid unit; and, 7. Compare the installed capital cost of a scaled-up commercial cyclone-filtration hybrid unit to the current gas filtration design without a cyclone unit, such as currently exists at the Wabash facility.

  10. Demonstration of coal reburning for cyclone boiler NO{sub x} control. Final project report

    SciTech Connect (OSTI)

    Not Available

    1994-02-01T23:59:59.000Z

    As part of the US Department of Energy`s (DOE`s) Innovative Clean Coal Technology Program, under Round 2, a project for Full Scale Demonstration of Coal Reburning for Cyclone Boiler Nitrogen Oxide (NO{sub x},) Control was selected. DOE sponsored The Babcock & Wilcox (B&W) Company, with Wisconsin Power & Light (WP&L) as the host utility, to demonstrate coal reburning technology at WP&L`s 110 MW{sub c}, cyclone-fired Unit No.2 at the Nelson Dewey Generating Station in Cassville, Wisconsin. The coal reburning demonstration was justified based on two prior studies. An Electric Power Research Institute (EPRI) and B&W sponsored engineering feasibility study indicated that the majority of cyclone-equipped boilers could successfully apply reburning technology to reduce NO{sub x}, emissions by 50 to 70%. An EPRI/Gas Research Institute (GRI)/B&W pilot-scale evaluation substantiated this conclusion through pilot-scale testing in B&W`s 6 million Btu/hr Small Boiler Simulator. Three different reburning fuels, natural gas, No. 6 oil, and pulverized coal were tested. This work showed that coal as a reburning fuel performs nearly as well as gas/oil without deleterious effects of combustion efficiency. Coal was selected for a full scale demonstration since it is available to all cyclone units and represents the highest level of technical difficulty-in demonstrating the technology.

  11. The effects of inlet velocity and barrel diameter on cyclone performance

    E-Print Network [OSTI]

    Faulkner, William Brock

    2006-08-16T23:59:59.000Z

    Cyclone separators are widely used in agricultural processing industries as air pollution abatement devices. The performance of cyclones is a function of the geometry of the cyclone, operating parameters, and the particle size distribution (PSD...

  12. An intercomparison experiment involving 15 commonly used detection and tracking algorithms for extratropical cyclones reveals those cyclone characteristics that are robust

    E-Print Network [OSTI]

    Raible, Christoph C.

    into separate features, and sometimes two will merge into one. Furthermore, extratropical cyclones occur in very for extratropical cyclones reveals those cyclone characteristics that are robust between different schemes and those that differ markedly. IMILAST A Community Effort to Intercompare Extratropical Cyclone Detection and Tracking

  13. Applying Nonlinear Signal Analysis Technologies to Flame Scanner Signals to Improve Staging of Cyclone Boilers for NOx control

    SciTech Connect (OSTI)

    Flynn, T. J. [Babcock and Wilcox Company, The; Bailey, R. T. [Babcock and Wilcox Company, The; Fuller, T. A. [Babcock and Wilcox Company, The; FINNEY, Charles E A [ORNL; Daw, C Stuart [ORNL; Stallings, J. [Electric Power Research Institute (EPRI); Himes, R. [Electric Power Research Institute (EPRI); Bermke, R. [Alliant Energy

    2006-08-01T23:59:59.000Z

    Cyclone{trademark} boiler owners continue to drive down NO{sub x} emissions by increasingly sophisticated staging and air distribution schemes. For example, Alliant Energy has employed RMT's SmartBurn{reg_sign} technology, and Ameren UE has pioneered neural nets to reduce emissions. Over the last 11 years under sponsorship of EPRI, the team of ORNL and B&W has developed pulverized coal burner diagnostic technology by applying nonlinear signal analysis techniques to flame scanner signals. The team has extended the technology to cyclones to facilitate deeper staging of the cyclones to reduce NO{sub x} emissions. Development projects were conducted at the Alliant Energy Edgewater Units 3 and 4, and Ameren UE Sioux Unit 1. Nonlinear analysis statistics were correlated to upsets in cyclone operation resulting from poor air distribution in the burner and barrel. The team demonstrated that the lighter and main flame scanners can be used to independently guide adjustments to the burner and barrel.

  14. Predicting cyclone emissions with a new computer mode

    E-Print Network [OSTI]

    Askew, James Wilson

    1993-01-01T23:59:59.000Z

    ) from Coulter Counter 10 Actual dimensions of 2D-2D (left) and 1D-3D (right) cyclones . 17 Schematic of cyclone data collection apparatus . . . . . 19 Fractional efficiency curve for a 1D-3D, 51 mm (2. 0 in. ) outlet, 975 m/min (3200 ft.../min) cyclone (talc) . 23 Graphs relating the normal distribution and fractional efficiency curve characteristics 25 FEC comparison of inlet concentrations for a 1D-3D, 51 mm (2. 0 in. ) outlet, 975 m/min (3200 ft/min) cyclone. (talc) 28 FEC comparison...

  15. "A New Paradigm for Secondary Eyewall Formation in Tropical Cyclones...

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

    Road Princeton, NJ 08540-6649 "A New Paradigm for Secondary Eyewall Formation in Tropical Cyclones", Chun-Chieh Wu (National Taiwan University) Contact Information Website: Website...

  16. Ocean Barrier Layers Effect on Tropical Cyclone Intensification

    SciTech Connect (OSTI)

    Balaguru, Karthik; Chang, P.; Saravanan, R.; Leung, Lai-Yung R.; Xu, Zhao; Li, M.; Hsieh, J.

    2012-09-04T23:59:59.000Z

    Improving a tropical cyclone's forecast and mitigating its destructive potential requires knowledge of various environmental factors that influence the cyclone's path and intensity. Herein, using a combination of observations and model simulations, we systematically demonstrate that tropical cyclone intensification is significantly affected by salinity-induced barrier layers, which are 'quasi-permanent' features in the upper tropical oceans. When tropical cyclones pass over regions with barrier layers, the increased stratification and stability within the layer reduce storm-induced vertical mixing and sea surface temperature cooling. This causes an increase in enthalpy flux from the ocean to the atmosphere and, consequently, an intensification of tropical cyclones. On average, the tropical cyclone intensification rate is nearly 50% higher over regions with barrier layers, compared to regions without. Our finding, which underscores the importance of observing not only the upper-ocean thermal structure but also the salinity structure in deep tropical barrier layer regions, may be a key to more skillful predictions of tropical cyclone intensities through improved ocean state estimates and simulations of barrier layer processes. As the hydrological cycle responds to global warming, any associated changes in the barrier layer distribution must be considered in projecting future tropical cyclone activity.

  17. A shrouded probe aerosol sampling cyclone

    E-Print Network [OSTI]

    Little, Stewart Craig

    1992-01-01T23:59:59.000Z

    AED at three different flow rates. The results would then be interpolated to give the needed flow rate value. The collection efficiency of the cyclone was characterized by the approach of generating liquid aerosols containing an analytical tracer... was neutralized by passing the aerosol flow through a chamber which contained a 10 mCi krypton 85 line source. Aerosol size produced by this apparatus depends on the concentration of the non-volatile solute, the size of the orifice, and the frequency applied...

  18. On the Wavelength of the Rossby Waves Radiated by Tropical Cyclones KYLE D. KROUSE

    E-Print Network [OSTI]

    Sobel, Adam

    of tropical cyclones; the theory then predicts the zonal separation distance of such tropical cyclone pairsOn the Wavelength of the Rossby Waves Radiated by Tropical Cyclones KYLE D. KROUSE Department cyclone (TC). In some cases, such disturbances undergo tropical cyclogenesis, resulting in a pair

  19. Compact cyclone filter train for radiological and hazardous environments

    DOE Patents [OSTI]

    Bench, T.R.

    1998-04-28T23:59:59.000Z

    A compact cyclone filter train is disclosed for the removal of hazardous and radiological particles from a gaseous fluid medium. This filter train permits a small cyclone separator to be used in a very small space envelope due to the arrangement of the filter housing adjacent to the separator with the cyclone separator and the filters mounted on a plate. The entire unit will have a hoist connection at the center of gravity so that the entire unit including the separator, the filters, and the base can be lifted and repositioned as desired. 3 figs.

  20. The acoustic environment of a Gulf Stream cyclonic ring

    E-Print Network [OSTI]

    Owens, George Edward

    1971-01-01T23:59:59.000Z

    9d ~ f&o y2o IZo leo rws /W Do /Zo DIST&'Lb'CE (km) 59 Fig. 19 Transmission loss versus range f' or sound transmission through Nestern Sargasso Sea water ( ? ) ano trans mi s s 1 0t1 thl ou(]h Lfle right half of the 1967 cyclonic ring... of the Gul f Stream. Trans. Amer. ~eo h~s. Un. , 49, 198-199. FUGLISTER, F. C. (1967) Abstract: Cyclonic eddies formed from meanders of the Gulf Stream. Trans. R ?. ~h s. 0 . , IR, 123. FUGSLISTER, F. C. (in prep. ) A cyclonic ring formed by the Gulf...

  1. Compact cyclone filter train for radiological and hazardous environments

    DOE Patents [OSTI]

    Bench, Thomas R. (Pittsburgh, PA)

    1998-01-01T23:59:59.000Z

    A compact cyclone filter train for the removal of hazardous and radiologi particles from a gaseous fluid medium which permits a small cyclone separator to be used in a very small space envelope due to the arrangement of the filter housing adjacent to the separator with the cyclone separator and the filters mounted on a plate. The entire unit will have a hoist connection at the center of gravity so that the entire unit including the separator, the filters, and the base can be lifted and repositioned as desired.

  2. WMO/CAS/WWW SIXTH INTERNATIONAL WORKSHOP on TROPICAL CYCLONES

    E-Print Network [OSTI]

    Colorado at Boulder, University of

    to Human and Economic Losses Rapporteur: Roger A. Pielke, Jr. Center for Science and Technology Policy.2.3 Tropical cyclone case studies a) India b) Australia c) United States 5.2.4 Differing views of the role

  3. american tropical cyclone: Topics by E-print Network

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

    24 25 Next Page Last Page Topic Index 21 Cross-equatorial influences of a South American cold surge on the development of two eastern North Pacific tropical cyclones Texas A&M...

  4. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2014

    E-Print Network [OSTI]

    Days (MHD) (3.9) 2 3 Accumulated Cyclone Energy (ACE) (92) 55 65 Net Tropical Cyclone Activity (NTC. We expect Atlantic basin Net Tropical Cyclone (NTC) activity in

  5. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2011

    E-Print Network [OSTI]

    Gray, William

    Accumulated Cyclone Energy (ACE) (96.1) 165 160 160 Net Tropical Cyclone Activity (NTC) (100%) 180 175 175 Net Tropical Cyclone (NTC) activity in 2011 to be approximately 175 percent of the long-term average

  6. FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2014

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    (MHD) (3.9) 2 3 3 Accumulated Cyclone Energy (ACE) (92) 55 65 65 Net Tropical Cyclone Activity (NTC percent of the long-period average. We expect Atlantic basin Net Tropical Cyclone (NTC) activity in 2014

  7. Sensitivity of Tropical Cyclone Intensity to Ventilation in an Axisymmetric Model

    E-Print Network [OSTI]

    Tang, Brian

    The sensitivity of tropical cyclone intensity to ventilation of cooler, drier air into the inner core is examined using an axisymmetric tropical cyclone model with parameterized ventilation. Sufficiently strong ventilation ...

  8. Performance characteristics of a low pressure cyclone for axial-flow fan exhausts

    E-Print Network [OSTI]

    Simpson, Shay Lynn

    1996-01-01T23:59:59.000Z

    on axial-flow fan exhausts to significantly reduce particulate emissions. Average emission concentrations, cut-point diameters, PMIO emission concentrations, and fractional efficiencies from this cyclone operating at different cyclone inlet velocities...

  9. Opposed-flow virtual cyclone for particle concentration

    DOE Patents [OSTI]

    Rader, Daniel J. (Lafayette, CA); Torczynski, John R. (Albuquerque, NM)

    2000-12-05T23:59:59.000Z

    An opposed-flow virtual cyclone for aerosol collation which can accurately collect, classify, and concentrate (enrich) particles in a specific size range. The opposed-flow virtual cyclone is a variation on the virtual cyclone and has its inherent advantages (no-impact particle separation in a simple geometry), while providing a more robust design for concentrating particles in a flow-through type system. The opposed-flow virtual cyclone consists of two geometrically similar virtual cyclones arranged such that their inlet jets are inwardly directed and symmetrically opposed relative to a plane of symmetry located between the two inlet slits. A top plate bounds both jets on the "top" side of the inlets, while the other or lower wall curves "down" and away from each inlet jet. Each inlet jet will follow the adjacent lower wall as it turns away, and that particles will be transferred away from the wall and towards the symmetry plane by centrifugal action. After turning, the two jets merge smoothly along the symmetry line and flow parallel to it through the throat. Particles are transferred from the main flows, across a dividing streamline, and into a central recirculating region, where particle concentrations become greatly increased relative to the main stream.

  10. PV production Accumulator

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Profile COMPARISON BETWEEN LEAD-ACID AND LI-ION ACCUMULATORS IN STAND-ALONE PHOTOVOLTAIC SYSTEM USING-ion accumulators more and more envisioned in such applications. In this paper, sizing optimisations of SAPV systems have been lead for each accumulator technology considered. The photovoltaic system has been simulated

  11. Multiobjective Optimization of Cyclone Separators Using Genetic G. Ravi, Santosh K. Gupta, and M. B. Ray*

    E-Print Network [OSTI]

    Coello, Carlos A. Coello

    Multiobjective Optimization of Cyclone Separators Using Genetic Algorithm G. Ravi, Santosh K. Gupta-flow cyclone separators in parallel was carried out by using the nondominated sorting genetic algorithm (NSGA Cyclone separators have been used extensively during this century as a major gas-cleaning device. The stan

  12. Notes and Correspondence Are Tropical Cyclones Less Effectively Formed by Easterly Waves in the

    E-Print Network [OSTI]

    Chen, Tsing-Chang "Mike"

    tropical cyclones in the western North Pacific. By carefully separating easterly waves from the lowerNotes and Correspondence Are Tropical Cyclones Less Effectively Formed by Easterly Waves@iastate.edu #12;1 Abstract It has been observed that the percentage of tropical cyclones originating from easterly

  13. Heightened tropical cyclone activity in the North Atlantic: natural variability or

    E-Print Network [OSTI]

    Webster, Peter J.

    relatively stable regimes separated by sharp transitions. Each regime has seen 50% more cyclonesHeightened tropical cyclone activity in the North Atlantic: natural variability or climate trend cyclone and hurricane frequency over the past century in the North Atlantic Ocean have occurred as three

  14. Midlevel Ventilation's Constraint on Tropical Cyclone Intensity BRIAN TANG AND KERRY EMANUEL

    E-Print Network [OSTI]

    Emanuel, Kerry A.

    Midlevel Ventilation's Constraint on Tropical Cyclone Intensity BRIAN TANG AND KERRY EMANUEL ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hy to assess how ventilation affects tropical cyclone intensity via two possible pathways: the first through

  15. Demonstration of coal reburning for cyclone boiler NO{sub x} control. Appendix, Book 1

    SciTech Connect (OSTI)

    Not Available

    1994-06-01T23:59:59.000Z

    Based on the industry need for a pilot-scale cyclone boiler simulator, Babcock Wilcox (B&W) designed, fabricated, and installed such a facility at its Alliance Research Center (ARC) in 1985. The project involved conversion of an existing pulverized coal-fired facility to be cyclone-firing capable. Additionally, convective section tube banks were installed in the upper furnace in order to simulate a typical boiler convection pass. The small boiler simulator (SBS) is designed to simulate most fireside aspects of full-size utility boilers such as combustion and flue gas emissions characteristics, fireside deposition, etc. Prior to the design of the pilot-scale cyclone boiler simulator, the various cyclone boiler types were reviewed in order to identify the inherent cyclone boiler design characteristics which are applicable to the majority of these boilers. The cyclone boiler characteristics that were reviewed include NO{sub x} emissions, furnace exit gas temperature (FEGT) carbon loss, and total furnace residence time. Previous pilot-scale cyclone-fired furnace experience identified the following concerns: (1) Operability of a small cyclone furnace (e.g., continuous slag tapping capability). (2) The optimum cyclone(s) configuration for the pilot-scale unit. (3) Compatibility of NO{sub x} levels, carbon burnout, cyclone ash carryover to the convection pass, cyclone temperature, furnace residence time, and FEGT.

  16. Global warming shifts Pacific tropical cyclone location MinHo Kwon,1,3

    E-Print Network [OSTI]

    Li, Tim

    Global warming shifts Pacific tropical cyclone location Tim Li,1 MinHo Kwon,1,3 Ming Zhao,3 Jong) is used to investigate the change of tropical cyclone frequency in the North Pacific under global warming, and W. Yu (2010), Global warming shifts Pacific tropical cyclone location, Geophys. Res. Lett., 37, L

  17. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2014

    E-Print Network [OSTI]

    Gray, William

    Days (MHD) (3.9) 2 Accumulated Cyclone Energy (ACE) (92) 55 Net Tropical Cyclone Activity (NTC) (103 to be about 65 percent of the long-period average. We expect Atlantic basin Accumulated Cyclone Energy (ACE) and Net Tropical Cyclone (NTC) activity in 2014 to be approximately 60 percent of their long-term averages

  18. http://rcc.its.psu.edu/hpc Optimization of a Vortex Finder in a Cyclone Separator using

    E-Print Network [OSTI]

    Bjrnstad, Ottar Nordal

    http://rcc.its.psu.edu/hpc Optimization of a Vortex Finder in a Cyclone Separator using Particle of fluidized bed power plants is the cyclone separator. The cyclone separator is used to remove smaller particles, those not large enough for heat transfer, and retain large particles. The cyclone separator

  19. Subpilot-scale testing of acoustically enhanced cyclone collectors. Final report, September 1988--September 1994

    SciTech Connect (OSTI)

    Galica, M.A.; Campbell, A.H.; Rawlins, D.C.

    1994-08-01T23:59:59.000Z

    Gas turbines are used to recover energy from high temperature exhaust gases in coal-fired pressurized-fluidized bed, combined-cycle power generation systems. However, prior to entering the turbine hot-section, the majority of the fly ash must be removed in order to protect the turbine components from erosion, corrosion, and deposition of the ash. The U.S. Department of Energy under the direction of the Morgantown Energy Technology Center (METC) sponsored the development of an acoustically enhanced cyclone collector which offers the potential of achieving environmental control standards under Pressurized Fluid Bed Combustors (PFBC) conditions without the need for post-turbine particulate control. Pulse combustors developed by Manufacturing and Technology Conversation International, Inc. (MTCI) produced the acoustic power necessary to agglomerate ash particles into sizes large enough to be collected in a conventional cyclone system. A hot gas cleanup system that meets both turbine protection and emissions requirements without post-turbine particulate controls would also have improved overall system economics.

  20. DESIGN AND DEVELOPMENT OF GAS-LIQUID CYLINDRICAL CYCLONE COMPACT SEPARATORS FOR THREE-PHASE FLOW

    SciTech Connect (OSTI)

    Dr. Ram S. Mohan; Dr. Ovadia Shoham

    2003-06-25T23:59:59.000Z

    The U.S. Department of Energy (DOE) has awarded a five-year (1997-2002) grant (Mohan and Shoham, DE-FG26-97BC15024, 1997) to The University of Tulsa, to develop compact multiphase separation components for 3-phase flow. The research activities of this project have been conducted through cost sharing by the member companies of the Tulsa University Separation Technology Projects (TUSTP) research consortium and the Oklahoma Center for the Advancement of Science and Technology (OCAST). As part of this project, several individual compact separation components have been developed for onshore and offshore applications. These include gas-liquid cylindrical cyclones (GLCC{copyright}), liquid-liquid cylindrical cyclones (LLCC{copyright}), and the gas-liquid-liquid cylindrical cyclones (GLLCC{copyright}). A detailed study has also been completed for the liquid-liquid hydrocyclones (LLHC). Appropriate control strategies have been developed for proper operation of the GLCC{copyright} and LLCC{copyright}. Testing of GLCC{copyright} at high pressure and real crude conditions for field applications is also completed. Limited studies have been conducted on flow conditioning devices to be used upstream of the compact separators for performance improvement. This report presents a brief overview of the activities and tasks accomplished during the 5-year project period, October 1, 1997-March 31, 2003 (including the no-cost extended period of 6 months). An executive summary is presented initially followed by the tasks of the 5-year budget periods. Then, detailed description of the experimental and modeling investigations are presented. Subsequently, the technical and scientific results of the activities of this project period are presented with some discussions. The findings of this investigation are summarized in the ''Conclusions'' section, followed by relevant references. The publications resulting from this study in the form of MS Theses, Ph.D. Dissertation, Journal Papers and Conference Presentations are provided at the end of this report.

  1. The 2007 North Atlantic Hurricane Season A Climate Perspective

    E-Print Network [OSTI]

    Atmospheric Administration(NOAA)AccumulatedCyclone Energy (ACE) index (Bell et al. 2000), a measure of the season's overall

  2. Explicit Interleavers for a Repeat Accumulate Accumulate (RAA) code construction

    E-Print Network [OSTI]

    Guruswami, Venkatesan

    Explicit Interleavers for a Repeat Accumulate Accumulate (RAA) code construction Venkatesan: widad@cs.washington.edu Abstract-- Repeat Accumulate Accumulate (RAA) codes are turbo-like codes where), then an accumulator, then a second permutation, and finally a second accumulator. Bazzi, Mahdian, and Spielman (2003

  3. Advanced cleanup device performance design report (Task 4. 3). Volume A. Cyclone theory and data correlation

    SciTech Connect (OSTI)

    Not Available

    1981-01-01T23:59:59.000Z

    The 100-year-old cyclone is perhaps the best known and least expensive method of gas particulate cleaning. The theory and practice of cyclone operation has been extensively documented. The body of experience indicates that small cyclones operated at high swirl velocity give better separative efficiency although consideration must also be given to coarse particle bouncing and limitations associated with system pressure losses and cyclone erosion. Hence, multicyclones (i.e., many small cyclones operating in parallel), and staging have been employed in situations where unusually clean gas is mandated. Despite the extensive body of literature on the subject, predicting the performance of cyclones in actual service remains an art. The inadequacies in the existing cyclone theories quickly became evident in the course of several experimental programs at GE using various cyclone designs. The most significant finding of this work has been the observation that electrostatic forces could enhance, or, in fact, dominate the separation process. Cyclone separative efficiencies, with natural electrostatic effects present, were found to be independent of flowrate or even to improve at low flowrates, completely contrary to any of the existing cyclone literature. By implication, it is also possible that such electrostatic forces could influence cyclone scaling so that large cyclones employed in the cleanup train may not suffer the performance degradation compared to small cyclones, as projected from conventional inertial theory. Much of the GE work has therefore been oriented toward understanding and augmenting these electrostatic effects. This report is a collection of the most significant papers and memos on cyclone performance generated during the past three years by General Electric under the CFCC program.

  4. Hurricane Earl, September 1, 2010/NOAA Tropical Cyclones

    E-Print Network [OSTI]

    Fang, Yuguang "Michael"

    Hurricane Earl, September 1, 2010/NOAA Tropical Cyclones A PREPAREDNESS GUIDE U.S. DEPARTMENT, 6 of which became hurricanes East Pacific Ocean: 15 tropical storms, 8 of which became hurricanes Central Pacific Ocean: 4 tropical storms, 2 of which became hurricanes Over a typical 2-year period, the U

  5. Cyclone reactor with internal separation and axial recirculation

    DOE Patents [OSTI]

    Becker, Frederick E. (Reading, MA); Smolensky, Leo A. (Concord, MA)

    1989-01-01T23:59:59.000Z

    A cyclone combustor apparatus contains a circular partition plate containing a central circular aperture. The partition plate divides the apparatus into a cylindrical precombustor chamber and a combustor chamber. A coal-water slurry is passed axially into the inlet end of the precombustor chamber, and primary air is passed tangentially into said chamber to establish a cyclonic air flow. Combustion products pass through the partition plate aperture and into the combustor chamber. Secondary air may also be passed tangentially into the combustor chamber adjacent the partition plate to maintain the cyclonic flow. Flue gas is passed axially out of the combustor chamber at the outlet end and ash is withdrawn tangentially from the combuston chamber at the outlet end. A first mixture of flue gas and ash may be tangentially withdrawn from the combustor chamber at the outlet end and recirculated to the axial inlet of the precombustor chamber with the coal-water slurry. A second mixture of flue gas and ash may be tangentially withdrawn from the outlet end of the combustor chamber and passed to a heat exchanger for cooling. Cooled second mixture is then recirculated to the axial inlet of the precombustor chamber. In another embodiment a single cyclone combustor chamber is provided with both the recirculation streams of the first mixture and the second mixture.

  6. Cyclone reactor with internal separation and axial recirculation

    DOE Patents [OSTI]

    Becker, F.E.; Smolensky, L.A.

    1988-07-19T23:59:59.000Z

    A cyclone combustor apparatus contains a circular partition plate containing a central circular aperture is described. The partition plate divides the apparatus into a cylindrical precombustor chamber and a combustor chamber. A coal-water slurry is passed axially into the inlet end of the precombustor chamber, and primary air is passed tangentially into said chamber to establish a cyclonic air flow. Combustion products pass through the partition plate aperture and into the combustor chamber. Secondary air may also be passed tangentially into the combustor chamber adjacent the partition plate to maintain the cyclonic flow. Flue gas is passed axially out of the combustor chamber at the outlet end and ash is withdrawn tangentially from the combustor chamber at the outlet end. A first mixture of flue gas and ash may be tangentially withdrawn from the combustor chamber at the outlet end and recirculated to the axial inlet of the precombustor chamber with the coal-water slurry. A second mixture may be tangentially withdrawn from the outlet end and passed to a heat exchanger for cooling. Cooled second mixture is then recirculated to the axial inlet of the precombustor chamber. In another embodiment a single cyclone combustor chamber is provided with both the recirculation streams of the first mixture and the second mixture. 10 figs.

  7. Solids Accumulation Scouting Studies

    SciTech Connect (OSTI)

    Duignan, M. R.; Steeper, T. J.; Steimke, J. L.

    2012-09-26T23:59:59.000Z

    The objective of Solids Accumulation activities was to perform scaled testing to understand the behavior of remaining solids in a Double Shell Tank (DST), specifically AW-105, at Hanford during multiple fill, mix, and transfer operations. It is important to know if fissionable materials can concentrate when waste is transferred from staging tanks prior to feeding waste treatment plants. Specifically, there is a concern that large, dense particles containing plutonium could accumulate in poorly mixed regions of a blend tank heel for tanks that employ mixing jet pumps. At the request of the DOE Hanford Tank Operations Contractor, Washington River Protection Solutions, the Engineering Development Laboratory of the Savannah River National Laboratory performed a scouting study in a 1/22-scale model of a waste staging tank to investigate this concern and to develop measurement techniques that could be applied in a more extensive study at a larger scale. Simulated waste tank solids: Gibbsite, Zirconia, Sand, and Stainless Steel, with stainless steel particles representing the heavier particles, e.g., plutonium, and supernatant were charged to the test tank and rotating liquid jets were used to mix most of the solids while the simulant was pumped out. Subsequently, the volume and shape of the mounds of residual solids and the spatial concentration profiles for the surrogate for heavier particles were measured. Several techniques were developed and equipment designed to accomplish the measurements needed and they included: 1. Magnetic particle separator to remove simulant stainless steel solids. A device was designed and built to capture these solids, which represent the heavier solids during a waste transfer from a staging tank. 2. Photographic equipment to determine the volume of the solids mounds. The mounds were photographed as they were exposed at different tank waste levels to develop a composite of topographical areas. 3. Laser rangefinders to determine the volume of the solids mounds. The mounds were scanned after tank supernatant was removed. 4. Core sampler to determine the stainless steel solids distribution within the solids mounds. This sampler was designed and built to remove small sections of the mounds to evaluate concentrations of the stainless steel solids at different special locations. 5. Computer driven positioner that placed the laser rangefinders and the core sampler in appropriate locations over solids mounds that accumulated on the bottom of a scaled staging tank where mixing is poor. These devices and techniques were effective to estimate the movement, location, and concentrations of the solids representing heavier particles and could perform well at a larger scale The experiment contained two campaigns with each comprised of ten cycles to fill and empty the scaled staging tank. The tank was filled without mixing, but emptied, while mixing, in seven batches; the first six were of equal volumes of 13.1 gallons each to represent the planned fullscale batches of 145,000 gallons, and the last, partial, batch of 6.9 gallons represented a full-scale partial batch of 76,000 gallons that will leave a 72-inch heel in the staging tank for the next cycle. The sole difference between the two campaigns was the energy to mix the scaled staging tank, i.e., the nozzle velocity and jet rotational speed of the two jet pumps. Campaign 1 used 22.9 ft/s, at 1.54 rpm based on past testing and Campaign 2 used 23.9 ft/s at 1.75 rpm, based on visual observation of minimum velocity that allowed fast settling solids, i.e., sand and stainless steel, to accumulate on the scaled tank bottom.

  8. The 2005 North Atlantic Hurricane Season A Climate Perspective

    E-Print Network [OSTI]

    , a record estimated Accumulated Cyclone Energy (ACE) index (Bell et al. 2000) of 285% of the median (Fig. 1, and four major hurricanes struck the Fig. 1. NOAA's Accumulated Cyclone Energy (ACE) index expressed 1983 1989 1986 ACE(%ofMedian) NOAA's Accumulated Cyclone Energy (ACE) Index 2005 NOAA'sAugust 2005

  9. The 2010 North Atlantic Hurricane Season A Climate Perspective

    E-Print Network [OSTI]

    . The2010seasonalAccumulated CycloneEnergy(ACE)value(Belletal. 2000) was 166.3 x 104 kt2 , which cor 2007 High-activity Era High-activity Era Low-activity Era NOAA's Accumulated Cyclone Energy (ACE) Index 2010 175 Fig. 2. NOAA'sAccumulated Cyclone Energy (ACE) index expressed as percent of the 1950

  10. Accumulate-Repeat-Accumulate Codes: Systematic Codes Achieving the Binary

    E-Print Network [OSTI]

    Sason, Igal

    Accumulate-Repeat-Accumulate Codes: Systematic Codes Achieving the Binary Erasure Channel Capacity@ee.technion.ac.il Abstract The paper introduces ensembles of accumulate-repeat-accumulate (ARA) codes which asymp- totically by the first capacity-achieving ensembles of ir- regular repeat-accumulate (IRA) codes with bounded complexity

  11. A new engineering approach to cyclone design for cotton gins

    E-Print Network [OSTI]

    Wang, Lingjuan

    2000-01-01T23:59:59.000Z

    TABLE 1 Fine dust and lint fiber content in the trash. Page 26 2 The air flow rates of the testing system 28 3 Average emission concentration (1) . . . . . . 36 4 Average emission concentration (2) . . 5 Experimental data based FEC's for fly ash... 6 Overall collection efficiency for the cyclones with fly ash . . . 36 40 . . . . 40 7 Actual emission concentrations and overall efficiencies vs. predicted emission concentrations and overall efficiencies by using model FEC's generated from...

  12. The Influence of El Nin~oSouthern Oscillation and the Atlantic Multidecadal Oscillation on Caribbean Tropical Cyclone Activity

    E-Print Network [OSTI]

    Gray, William

    on Caribbean Tropical Cyclone Activity PHILIP J. KLOTZBACH Department of Atmospheric Science, Colorado State Caribbean basin tropical cyclone activity shows significant variability on interannual as well as multidecadal time scales. Comprehensive statistics for Caribbean hurricane activity are tabulated

  13. accumulate transcription machinery: Topics by E-print Network

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

    European Photovoltaic Solar Energy Conference, HAMBURG : Germany (2009)" 12;))).(.(1.( 110 s economic (and energetic) cost of storage accumulator system is still limiting the...

  14. accumulation areas rcra: Topics by E-print Network

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

    Ivn 10 PV production Accumulator Physics Websites Summary: European Photovoltaic Solar Energy Conference, HAMBURG : Germany (2009)" 12;))).(.(1.( 110 s economic (and...

  15. A Comparison of Extra-tropical Cyclones in Recent Re-analyses; ERA-INTERIM, NASA-MERRA,

    E-Print Network [OSTI]

    Hodges, Kevin

    separation of the identically same cyclones is typically less than 20 geodesic in both hemispheresA Comparison of Extra-tropical Cyclones in Recent Re-analyses; ERA-INTERIM, NASA-MERRA, NCEP Corresponding author: Kevin Hodges email: kih@mail.nerc-essc.ac.uk #12;Abstract Extra-tropical cyclones

  16. Connections between SST and cyclonicity parameters as deduced from empirical data and GCM runs with prescribed SST

    SciTech Connect (OSTI)

    Bardin, M.Yu. [Institute for Global Climate and Ecology, Moscow (Russian Federation); Rubinstein, K.G. [Hydrometeorological Center of Russia, Moscow (Russian Federation)

    1997-12-31T23:59:59.000Z

    Previously the authors investigated separately effects of the underlying surface on climate variables (among them, parameters of cyclonicity) by empirical model data. The present study has a twofold goal: (i) to investigate model capabilities in reproducing relationships between SST and cyclonicity and (ii) deduce possible causes of certain large-scale climate anomalies, reflected in cyclone parameters, from model experiment data.

  17. Vertical Structure of Tropical Cyclone Rainbands as Seen by the TRMM Precipitation Radar

    E-Print Network [OSTI]

    Houze Jr., Robert A.

    Vertical Structure of Tropical Cyclone Rainbands as Seen by the TRMM Precipitation Radar DEANNA A Measurement Mission satellite's Precipitation Radar (TRMM PR) show the vertical structure of tropical cyclone separated by the melting layer. The ice layer is a combination of particles imported from the eyewall

  18. Validating Atmospheric Reanalysis Data Using Tropical Cyclones as Thermometers James P. Kossin

    E-Print Network [OSTI]

    Kossin, James P.

    1 Validating Atmospheric Reanalysis Data Using Tropical Cyclones as Thermometers James P. Kossin 2014; accepted 15 October 2014) If you would like to cite the Early Online Release in a separate work tropical cyclones as thermometers. Bull. Amer. Meteor. Soc. doi:10.1175/BAMS-D-14-00180, in press. Capsule

  19. Developing versus Nondeveloping Disturbances for Tropical Cyclone Formation. Part I: North Atlantic*

    E-Print Network [OSTI]

    Li, Tim

    Developing versus Nondeveloping Disturbances for Tropical Cyclone Formation. Part I: North Atlantic the characteristic differences of tropical disturbances that eventually develop into tropical cyclones (TCs) versus for TC genesis in the North Atlantic. When the east and west (separated by 408W) Atlantic are examined

  20. Influence of local and remote SST on North Atlantic tropical cyclone potential intensity

    E-Print Network [OSTI]

    Camargo, Suzana J.

    Influence of local and remote SST on North Atlantic tropical cyclone potential intensity Suzana J of local and remote sea surface temperature (SST) on the tropical cyclone potential intensity in the North Atlantic using a suite of model simulations, while separating the impact of anthropogenic (external

  1. Sensitivity of an Ocean-Atmosphere Coupled Model to the Coupling Method : Study of Tropical Cyclone

    E-Print Network [OSTI]

    Recanati, Catherine

    Sensitivity of an Ocean-Atmosphere Coupled Model to the Coupling Method : Study of Tropical Cyclone) in a realistic configuration aiming at simulating the genesis and propagation of tropical cyclone Erica and Oceanic Coupled Models (AOCMs) which account for important air-sea feedbacks. Separate integrations

  2. Tropical Cyclone and Monsoon-Induced Rainfall Variability in Taiwan JAU-MING CHEN

    E-Print Network [OSTI]

    Li, Tim

    Tropical Cyclone and Monsoon-Induced Rainfall Variability in Taiwan JAU-MING CHEN Institute March 2010) ABSTRACT This study investigates the interannual variability of tropical cyclone (TC the relative effects of TCs and monsoons, local rainfall in Taiwan is separated into two subcomponents: TC

  3. Modulation of North Pacific Tropical Cyclone Activity by the2 Three Phases of ENSO3

    E-Print Network [OSTI]

    Webster, Peter J.

    1 1 Modulation of North Pacific Tropical Cyclone Activity by the2 Three Phases of ENSO3 4 Hye-Mail: hyemi.kim@eas.gatech.edu29 30 #12;2 Abstract30 Pacific Ocean warming has been separated into two modes (EPC), these three regimes are shown to have different impacts on34 tropical cyclone activity over

  4. Use of a Genesis Potential Index to Diagnose ENSO Effects on Tropical Cyclone Genesis

    E-Print Network [OSTI]

    Sobel, Adam

    Use of a Genesis Potential Index to Diagnose ENSO Effects on Tropical Cyclone Genesis SUZANA J influence on tropical cyclone activity. The authors examine how different environmental factors contribute. Composite anomalies of the genesis potential index are produced for El Nio and La Nia years separately

  5. Sensitivity of Ocean-Atmosphere Coupled Models to the Coupling Method : Example of Tropical Cyclone

    E-Print Network [OSTI]

    Sensitivity of Ocean-Atmosphere Coupled Models to the Coupling Method : Example of Tropical Cyclone and propagation of tropical cyclone Erica. Sensitiv- ity tests to the coupling method are carried out-sea feedbacks. Separate integrations of the Corresponding author. Phone: +33 (0)4 76 51 48 60 Fax: +33 (0)4 76

  6. Agency. Any Federal agency or organization participating in the tropical cyclone forecasting and warning service.

    E-Print Network [OSTI]

    cyclone forecasting and warning service. Airport Radar Service Area (ARSA). Regulatory airspace/IFR-standard IFR separation; IFR/VFR-traffic advisories and conflict resolution; and VFR/VFR-traffic advisories and of the center of a tropical or subtropical cyclone obtained by means other than reconnaissance aircraft

  7. Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar

    E-Print Network [OSTI]

    Houze Jr., Robert A.

    1 Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar Deanna A (TRMM PR) show the vertical structure of tropical cyclone rainbands. Radar-echo2 statistics show that rainbands have a two-layered structure, with distinct modes separated by the3 melting layer. The ice layer

  8. Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar

    E-Print Network [OSTI]

    Houze Jr., Robert A.

    1 Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar Deanna A's Precipitation Radar (TRMM PR) show the vertical structure of tropical cyclone rainbands. Radar-echo statistics show that rainbands have a two-layered structure, with distinct modes separated by the melting layer

  9. SCALAR WIND SPEED AND DIRECTION TROPICAL CYCLONE RETRIEVALS FOR CONICAL SCANNING SCATTEROMETERS

    E-Print Network [OSTI]

    Hennon, Christopher C.

    SCALAR WIND SPEED AND DIRECTION TROPICAL CYCLONE RETRIEVALS FOR CONICAL SCANNING SCATTEROMETERS--Scatterometer measurements of ocean vector winds (OVW) are significantly degraded in the presence of the precipitation, especially in tropical cyclones. This paper presents a new ocean hurricane/typhoon wind vector retrieval

  10. Mesoscale Simulation of Tropical Cyclones in the South Pacific: Climatology and Interannual Variability

    E-Print Network [OSTI]

    Mesoscale Simulation of Tropical Cyclones in the South Pacific: Climatology and Interannual is shown to reproduce a wide range of mesoscale convective systems. Tropical cyclones grow from the most related to mesoscale in- teractions, which also affect TC tracks and the resulting occurrence. 1

  11. The 2006 North Atlantic Hurricane Season A Climate Perspective

    E-Print Network [OSTI]

    2001 1995 1992 1980 1983 1989 1986 ACE(%ofMedian) NOAA's Accumulated Cyclone Energy (ACE) Index 75 117 0 50 100 150 200 250 300 2006 May August 2006NOAA Outlooks Fig.2.NOAA'sAccumulatedCycloneEnergy(ACENational OceanicandAtmospheric Administration's(NOAA's)Accu- mulatedCycloneEnergy(ACE) index (Bell et al. 2000).TheACE

  12. MID LATITUDE CYCLONE A CASE STUDY

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9November 6, In this3,OfficeWITH AT65-OCT. 5, Small

  13. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2011

    E-Print Network [OSTI]

    Gray, William

    Major Hurricane Days (MHD) (5.0) 10 Accumulated Cyclone Energy (ACE) (96.1) 165 Net Tropical Cyclone FOR 2011 We foresee an above-average Atlantic basin tropical cyclone season in 2011 and anticipate an above the largest year-to-year variability of any of the global tropical cyclone basins. People are curious to know

  14. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2010

    E-Print Network [OSTI]

    Gray, William

    -12 Accumulated Cyclone Energy (ACE) (96.1) 100-162 Net Tropical Cyclone Activity (NTC) (100%) 108 FOR 2010 We foresee an above-average Atlantic basin tropical cyclone season in 2010 and anticipate an above to climatology. The Atlantic basin has the largest year-to-year variability of any of the global tropical cyclone

  15. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2013

    E-Print Network [OSTI]

    Gray, William

    ) (3.9) 9 Accumulated Cyclone Energy (ACE) (92) 165 Net Tropical Cyclone Activity (NTC) (103%) 175 of the long-period average. We expect Atlantic basin Net Tropical Cyclone (NTC) activity in 2013 to climatology. The Atlantic basin has the largest year-to-year variability of any of the global tropical cyclone

  16. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2012

    E-Print Network [OSTI]

    Gray, William

    ) (3.9) 3 Accumulated Cyclone Energy (ACE) (92) 70 Net Tropical Cyclone Activity (NTC) (103%) 75 of the long-period average. We expect Atlantic basin Net Tropical Cyclone (NTC) activity in 2012 to climatology. The Atlantic basin has the largest year-to-year variability of any of the global tropical cyclone

  17. Low NO sub x /SO sub x Burner retrofit for utility cyclone boilers

    SciTech Connect (OSTI)

    Not Available

    1990-01-01T23:59:59.000Z

    The objective of this project is to demonstrate the LNS Burner as retrofitted to the host cyclone boiler for effective low-cost control of NO{sub x} and SO{sub x} emissions while firing a bituminous coal. The LNS Burner employs a simple, innovative combustion process to burn pulverized coal at high temperatures and provides effective, low-cost control of sulfur dioxide (SO{sub 2}) and nitrogen oxides (NO{sub x}) emissions. The coal ash contains sulfur and is removed in the form of molten slag and flyash. Cyclone-fired boiler units are typically older units firing high-sulfur bituminous coals at very high temperatures which results in very high NO{sub x} and SO{sub x} emissions. The addition of conventional emission control equipment, such as wet scrubbers, to these older cyclone units in order to meet current and future environmental regulations is generally not economic. Further, the units are generally not compatible with low sulfur coal switching for S0{sub 2} control or selective catalytic reduction technologies for NO{sub x} control. Because the LNS Burner operates at the same very high temperatures as a typical cyclone boiler and produces a similar slag product, it may offer a viable retrofit option for cyclone boiler emission control. This was confirmed by the Cyclone Boiler Retrofit Feasibility Study carried out by TransAlta and an Operating Committee formed of cyclone boiler owners in 1989. An existing utility cyclone boiler, was then selected for the evaluation of the cost and performance study. It was concluded that the LNS Burner retrofit would be a cost-effective option for control of cyclone boiler emissions. A full-scale demonstration of the LNS Burner retrofit was selected in October 1988 as part of the DOE's Clean Coal Technology Program Round II.

  18. Development of a liquid cyclone process to produce hull-free cottonseed flour from cottonseed fines

    E-Print Network [OSTI]

    Good, Richard Lanier

    1973-01-01T23:59:59.000Z

    Directed by: Prof. T. A. Noyes This thesis represents further study into the use of the liquid cyclone to produce a food quality cottonseed flour from the fines fraction from the material stream of a cottonseed oil mill. In the course... cyclone system and piping. New cyclone system and piping pinker. Stone mill. Plow diagram of the first pretreatment. Dyne Screen Flow diagram of the second pretreatment Open and closed view of the pin mill. 10 13 13 19 23 24 25 27 28 29...

  19. Polytypic Downwards Accumulations Jeremy Gibbons

    E-Print Network [OSTI]

    Gibbons, Jeremy

    Polytypic Downwards Accumulations Jeremy Gibbons School of Computing and Mathematical Sciences@brookes.ac.uk. Abstract. A downwards accumulation is a higher­order operation that distributes information downwards The notion of scans or accumulations on lists is well known, and has proved very fruitful for expressing

  20. Generic Downwards Accumulations Jeremy Gibbons

    E-Print Network [OSTI]

    Gibbons, Jeremy

    Generic Downwards Accumulations Jeremy Gibbons School of Computing and Mathematical Sciences@brookes.ac.uk. Abstract. A downwards accumulation is a higher-order operation that distributes information downwards; the resulting de#12;nition is co-inductive. 1 Introduction The notion of scans or accumulations on lists is well

  1. Temporal Specifications with Accumulative Values UDI BOKER, The Interdisciplinary Center, Herzliya, Israel

    E-Print Network [OSTI]

    Boker, Udi

    A Temporal Specifications with Accumulative Values UDI BOKER, The Interdisciplinary Center objectives lies the accumulation of values along a computation. It is often the accumulated sum, as with energy objectives, or the accumulated average, as with mean-payoff objectives. We investigate

  2. Optimizing the efficiency of cylindrical cyclone gas/liquid separators for field applications

    E-Print Network [OSTI]

    Adebare, Adedeji

    2006-10-30T23:59:59.000Z

    Problems associated with the use of compact cylindrical cyclone gas/liquid (CCGL) separators can be attributed to two physical phenomena: gas carry-under and liquid carryover (LCO). Inadequate understanding of the complex multiphase hydrodynamic...

  3. Global Ensemble Predictions of 2009's Tropical Cyclones Initialized with an Ensemble Kalman Filter

    E-Print Network [OSTI]

    Hamill, Tom

    Global Ensemble Predictions of 2009's Tropical Cyclones Initialized with an Ensemble Kalman Filter with the first 20 members of a 60-member ensemble Kalman filter (EnKF) using the T382L64 GFS. The GFS

  4. Global Ensemble Predictions of 2009's Tropical Cyclones Initialized with an Ensemble Kalman Filter

    E-Print Network [OSTI]

    Hamill, Tom

    1 Global Ensemble Predictions of 2009's Tropical Cyclones Initialized with an Ensemble Kalman models were initialized with the first 20 members of a 60member ensemble Kalman filter (EnKF) using

  5. Extreme rainfall intensities and long-term rainfall risk from tropical cyclones

    E-Print Network [OSTI]

    Langousis, Andreas, 1981-

    2009-01-01T23:59:59.000Z

    We develop a methodology for the frequency of extreme rainfall intensities caused by tropical cyclones (TCs) in coastal areas. The mean rainfall field associated with a TC with maximum tangential wind speed Vmax, radius ...

  6. Equilibrium Tropical Cyclone Size in an Idealized State of Axisymmetric RadiativeConvective Equilibrium*

    E-Print Network [OSTI]

    Chavas, Daniel R.

    Tropical cyclone size remains an unsolved problem in tropical meteorology, yet size plays a significant role in modulating damage. This work employs the Bryan cloud model (CM1) to systematically explore the sensitivity of ...

  7. Performance improvement of Gas-Liquid Cylindrical Cyclone separator using different design for tangential inlet

    E-Print Network [OSTI]

    Barbuceanu, Nicolae

    2001-01-01T23:59:59.000Z

    separators often rely on centrifugal forces to enhance the separation process and are therefore highly dependent on inlet geometry. This paper investigates expanding the operational envelope of a compact Gas-Liquid Cylindrical Cyclone separator through...

  8. Tropical cyclones within the sedimentary record : analyzing overwash deposition from event to millennial timescales

    E-Print Network [OSTI]

    Woodruff, Jonathan Dalrymple

    2009-01-01T23:59:59.000Z

    Tropical cyclone activity over the last 5000 years is investigated using overwash sediments from coastal lagoons on the islands of Vieques, Puerto Rico and Koshikijima, Japan. A simple sediment transport model can reproduce ...

  9. Does It Make Sense To Modify Tropical Cyclones? A Decision-Analytic Assessment

    E-Print Network [OSTI]

    Klima, Kelly

    Recent dramatic increases in damages caused by tropical cyclones (TCs) and improved understanding of TC physics have led DHS to fund research on intentional hurricane modification. We present a decision analytic assessment ...

  10. Cyclone analysis for the abatement of grain sorghum emmissions in granaries

    E-Print Network [OSTI]

    Avant, Robert V

    1976-01-01T23:59:59.000Z

    loading and one inlet velocity were tested to see if an optimal cyclone could be selected. Although the scope of this research was narrow and broader research testing different particle feed rates and entrance velocities was indicated, adequate... with the Texas Clean Air Act (1969) in some instances. Also, Shannon, et gl, (1975) found that cyclones equipped on a midwest granary emitted 26 pounds per hour of small particle dust while processing over 500, 000 pounds per hour of grain. These two...

  11. OCTOBER-NOVEMBER FORECAST FOR 2014 CARIBBEAN BASIN HURRICANE ACTIVITY

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    and hurricanes, but instead predicts both hurricane days and Accumulated Cyclone Energy (ACE). Typically, while) tropical cyclone (TC) activity. We have decided to issue this forecast, because Klotzbach (2011) has

  12. INTERNATIONAL JOURNAL OF CLIMATOLOGY Int. J. Climatol. 28: 727731 (2008)

    E-Print Network [OSTI]

    Wang, Bin

    1995 in terms of the accumulated cyclone energy (ACE) index. Defining the power dissipation index (PDI of tropical cyclones. The moderate increase in the annual accumulated PDI in the WNP basin was primarily due cyclone power dissipation index Liguang Wu,a,b* Bin Wangc and Scott A. Brauna a Laboratory for Atmospheres

  13. Accumulation Rate of Bound States of Dipoles in Graphene

    E-Print Network [OSTI]

    Simone Rademacher; Heinz Siedentop

    2015-07-08T23:59:59.000Z

    We prove that the bound state energies of the two-dimensional massive Dirac operator with dipole type potentials accumulate with exponentials rate at the band edge. In fact we prove a corresponding formula of De Martino et al (2014)

  14. Coal reburning for cyclone boiler NO sub x control demonstration

    SciTech Connect (OSTI)

    Not Available

    1992-01-01T23:59:59.000Z

    Babcock Wilcox engineering studies followed by pilot-scale testing has developed/confirmed the potential of utilizing gas, oil or coal reburning as a viable NO{sub x} reduction technology. To date, two US sponsored programs promote natural gas/oil as a reburning fuel because it was believed that gas/oil will provide significantly higher combustion efficiency than using coal at the reburn zone. Although B W has shown that gas/oil reburning will play a role in reducing NO{sub x} emissions from cyclone boilers, B W coal reburning research has also shown that coal as a reburning fuel performs nearly as well as gas/oil without deleterious effects on combustion efficiency. This means that boilers using reburning for NO, control can maintain 100% coal usage instead of switching to 20% gas/oil for reburning. As a result of the B W performed coal reburning research, the technology has advanced to the point which it is now ready for demonstration on a commercial scale.

  15. Le cyclone : un nouveau racteur chimique solaire gaz-solide Application la mise en oeuvre en continu de la pyrolyse flash de sciure de bois

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    separators, can be also used as gas-solid chemical reactors. Preli- minary experiments made on a cyclone535 Le cyclone : un nouveau racteur chimique solaire gaz-solide Application la mise en oeuvre en, rvis le 17 dcembre 1979, accept le 18 dcembre 1979) Rsum. 2014 Le cyclone, bien connu comme

  16. Impact of Secondary Eyewall Heating on Tropical Cyclone Intensity Change* XIAQIONG ZHOU, BIN WANG, XUYANG GE, AND TIM LI

    E-Print Network [OSTI]

    Wang, Bin

    Impact of Secondary Eyewall Heating on Tropical Cyclone Intensity Change* XIAQIONG ZHOU, BIN WANG is to explore the factors that might influence the intensity change of tropical cyclones (TCs) associated. Introduction Concentric eyewalls usually refer to two or more quasi-circular eyewalls separated by a convective

  17. HILDERBRAND, DOUGLAS CLARENCE. Risk assessment of North Carolina tropical cyclones (1925-2000). (Under the direction of Dr. Lian Xie)

    E-Print Network [OSTI]

    Liu, Paul

    conditions with 3.67 cubic miles of water. The next-highest value from previous tropical cyclones management decisions. #12;RISK ASSESSMENT OF NORTH CAROLINA TROPICAL CYCLONES (1925-2000) by DOUGLAS C. In 1995, he earned his Bachelor of Arts degree in geology and was accepted to

  18. Impact of Tropical Cyclones on the Heat Budget of the South Pacific Ocean S. JULLIEN,* C. E. MENKES,1

    E-Print Network [OSTI]

    Impact of Tropical Cyclones on the Heat Budget of the South Pacific Ocean S. JULLIEN,* C. E. MENKES cyclones (TCs) in the South Pacific convergence zone through a complete ocean heat budget. The TC impact, in final form 4 May 2012) ABSTRACT The present study investigates the integrated ocean response to tropical

  19. Anatomy and evolution of a cyclonic mesoscale eddy observed in the northeastern Pacific tropical-subtropical transition zone

    E-Print Network [OSTI]

    Anatomy and evolution of a cyclonic mesoscale eddy observed in the northeastern Pacific tropical and evolution of a cyclonic mesoscale eddy observed in the northeastern Pacific tropical-subtropical transition zone, J. Geophys. Res. Oceans, 118, doi:10.1002/ 2013JC009339. 1. Introduction [2] Mesoscale eddy

  20. Climate response to tropical cyclone-induced ocean mixing in an1 Earth system model of intermediate complexity2

    E-Print Network [OSTI]

    Climate response to tropical cyclone-induced ocean mixing in an1 Earth system model of intermediate system model of intermediate complexity. The parameterization is based on21 previously published global. Abstract19 We introduce a parameterization of ocean mixing by tropical cyclones (TCs) into20 an Earth

  1. Effects of tropical cyclones on large-scale circulation and ocean heat transport in the South China Sea

    E-Print Network [OSTI]

    transport. Secondly, TCs pump surface heat downward to the thermocline, increasing the heat injection from cyclone Á Heat transport Á Air-sea interaction 1 Introduction The South China Sea (SCS) is the largestEffects of tropical cyclones on large-scale circulation and ocean heat transport in the South China

  2. Tropical Cyclone Changes in the Western North Pacific in a Global Warming Scenario MARKUS STOWASSER, YUQING WANG, AND KEVIN HAMILTON

    E-Print Network [OSTI]

    Wang, Yuqing

    Tropical Cyclone Changes in the Western North Pacific in a Global Warming Scenario MARKUS STOWASSER The influence of global warming on the climatology of tropical cyclones in the western North Pacific basin Model version 2 (CCSM2) coupled global climate model. The regional model is first tested in 10 yr

  3. Objective analysis of tropical cyclone intensity, strength, and size using routine aircraft reconnaissance data

    E-Print Network [OSTI]

    Stanfield, Charles Baynard

    1986-01-01T23:59:59.000Z

    for the purpose of quant1fying tropical cyclone inten- sity, strength, and size 1s exam1ned. A computer program is developed which may be used 1n near real t1me or after the fact to evaluate local1zed pressure/wind relationships in the tropical cyclone env1ron... representative set of data is obtained over a 13 month per1od for the entire spectrum of storms from tropical de- pression to super typhoon. These data are used to try to establish empirical pressure/wind relationsh1ps and a means of determining effec- tive...

  4. activation analysis summary: Topics by E-print Network

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

    HURRICANE FORECASTS FOR 2011 activity. 3 12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACE) - A measure of a named storm 146 SUMMARY OF 2014 ATLANTIC TROPICAL...

  5. active length verification: Topics by E-print Network

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

    HURRICANE FORECASTS FOR 2011 activity. 3 12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACE) - A measure of a named storm 16 SUMMARY OF 2014 ATLANTIC TROPICAL...

  6. ace inhibitory activity: Topics by E-print Network

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

    HURRICANE FORECASTS FOR 2011 activity. 3 12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACE) - A measure of a named storm 234 The Geomagnetic Field Experiment...

  7. activity survey summary: Topics by E-print Network

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

    HURRICANE FORECASTS FOR 2011 activity. 3 12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACE) - A measure of a named storm 224 SUMMARY OF 2014 ATLANTIC TROPICAL...

  8. atlantic basin etude: Topics by E-print Network

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

    Rifian Corridor Utrecht, Universiteit 7 Prediction of Seasonal Atlantic Basin Accumulated Cyclone Energy from 1 July PHILIP J. KLOTZBACH Geosciences Websites Summary: Prediction of...

  9. activities summary book: Topics by E-print Network

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

    HURRICANE FORECASTS FOR 2011 activity. 3 12;DEFINITIONS AND ACRONYMS Accumulated Cyclone Energy (ACE) - A measure of a named storm 155 SUMMARY OF 2014 ATLANTIC TROPICAL...

  10. Capacity-Achieving Accumulate-Repeat-Accumulate Codes for the BEC with Bounded Complexity

    E-Print Network [OSTI]

    Sason, Igal

    Capacity-Achieving Accumulate-Repeat-Accumulate Codes for the BEC with Bounded Complexity Igal-Achieving Codes and Complexity 2 Accumulate-Repeat-Accumulate Codes 3 Simulations 4 Symmetry, Duality, and New Transmission Rates Cheaper Systems Why Accumulate-Repeat-Accumulate (ARA) Codes ? They can provide better

  11. Tes$ng of the GFS EnKF for 2010's tropical cyclones

    E-Print Network [OSTI]

    Hamill, Tom

    Tes$ng of the GFS EnKF for 2010's tropical cyclones Tom Hamill, Jeff$ng TCVitals minimum SLP separately as posi$on / intensity data, rather than trea as last year 13 have not made switch yet with this to separate posi

  12. An Interactive Parallel Coordinates Technique Applied to a Tropical Cyclone Climate

    E-Print Network [OSTI]

    Swan II, J. Edward

    An Interactive Parallel Coordinates Technique Applied to a Tropical Cyclone Climate Analysis Chad A Blvd., Naval Research Laboratory, Stennis Space Center, MS, USA, (voice) 228-688-4558, (fax) 228, Mississippi State University, Stennis Space Center, MS, USA dDepartment of Physics and Astronomy, Mississippi

  13. New view of Arctic cyclone activity from the Arctic system reanalysis

    E-Print Network [OSTI]

    Howat, Ian M.

    , this role may increase in the future climate due to the changing environmental conditions [Screen et al of Sciences, Moscow, Russia, 2 Natural Risks Assessment Laboratory, Moscow State University, Moscow, Russia, 3 for Environmental Prediction-Climate Forecast System Reanalysis), ASR shows a considerably higher number of cyclones

  14. The great 2012 Arctic Ocean summer cyclone enhanced biological productivity on the shelves

    E-Print Network [OSTI]

    Zhang, Jinlun

    The great 2012 Arctic Ocean summer cyclone enhanced biological productivity on the shelves Jinlun influences the marine planktonic ecosystem by enhancing productivity on the shelves of the Chukchi, East days, the simulated biological effects on the shelves last 1 month or longer. At some locations

  15. Have Increases in CO2 Contributed to the Recent

    E-Print Network [OSTI]

    Gray, William

    since 1979. Global Accumulated Cyclone Energy (ACE) shows significant year-to-year and decadal 233 5.1. US Landfall Observations 233 6. IPCC-IV'S Tropical Cyclone Mis-statements 236 7. Special to indicate increased hurricane frequency or intensity in any of the globe's other tropical cyclone basins

  16. INTERNATIONAL JOURNAL OF CLIMATOLOGY Int. J. Climatol. 27: 311325 (2007)

    E-Print Network [OSTI]

    Camargo, Suzana J.

    such as first positions, tracks, accumulated cyclone energy (ACE) and duration. While the RSM does not reproduce the higher number of TCs in 1994 than in 1998, other measures of TC activity (ACE, number of cyclone days for downscaling seasonal tropical cyclone activity using the NCEP regional spectral model Suzana J. Camargo

  17. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2013

    E-Print Network [OSTI]

    Hurricanes (MH) (2.0) 4 4 Major Hurricane Days (MHD) (3.9) 9 9 Accumulated Cyclone Energy (ACE) (92) 165 165 Net Tropical Cyclone Activity (NTC) (103%) 175 175 PROBABILITIES FOR AT LEAST ONE MAJOR (CATEGORY 3 percent of the long-period average. We expect Atlantic basin Net Tropical Cyclone (NTC) activity in 2013

  18. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2011

    E-Print Network [OSTI]

    Gray, William

    Hurricanes (MH) (2.3) 5 5 Major Hurricane Days (MHD) (5.0) 10 10 Accumulated Cyclone Energy (ACE) (96.1) 165 160 Net Tropical Cyclone Activity (NTC) (100%) 180 175 PROBABILITIES FOR AT LEAST ONE MAJOR (CATEGORY. We expect Atlantic basin Net Tropical Cyclone (NTC) activity in 2011 to be approximately 175 percent

  19. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 1 SEPTEMBER 14, 2010

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all are not developing any new tropical cyclones after Earl and Fiona. We expect Earl to generate large amounts of ACE This is the second year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting

  20. Demonstration of natural gas reburn for NO{sub x} emissions reduction at Ohio Edison Company`s cyclone-fired Niles Plant Unit Number 1

    SciTech Connect (OSTI)

    Borio, R.W.; Lewis, R.D.; Koucky, R.W. [ABB Power Plant Labs., Windsor, CT (United States)] [ABB Power Plant Labs., Windsor, CT (United States); Lookman, A.A. [Energy Systems Associates, Pittsburgh, PA (United States)] [Energy Systems Associates, Pittsburgh, PA (United States); Manos, M.G.; Corfman, D.W.; Waddingham, A.L. [Ohio Edison, Akron, OH (United States)] [Ohio Edison, Akron, OH (United States); Johnson, S.A. [Quinapoxet Engineering Solutions, Inc., Windham, NH (United States)] [Quinapoxet Engineering Solutions, Inc., Windham, NH (United States)

    1996-04-01T23:59:59.000Z

    Electric utility power plants account for about one-third of the NO{sub x} and two-thirds of the SO{sub 2} emissions in the US cyclone-fired boilers, while representing about 9% of the US coal-fired generating capacity, emit about 14% of the NO{sub x} produced by coal-fired utility boilers. Given this background, the Environmental Protection Agency, the Gas Research Institute, the Electric Power Research Institute, the Pittsburgh Energy Technology Center, and the Ohio Coal Development Office sponsored a program led by ABB Combustion Engineering, Inc. (ABB-CE) to demonstrate reburning on a cyclone-fired boiler. Ohio Edison provided Unit No. 1 at their Niles Station for the reburn demonstration along with financial assistance. The Niles Unit No. 1 reburn system was started up in September 1990. This reburn program was the first full-scale reburn system demonstration in the US. This report describes work performed during the program. The work included a review of reburn technology, aerodynamic flow model testing of reburn system design concepts, design and construction of the reburn system, parametric performance testing, long-term load dispatch testing, and boiler tube wall thickness monitoring. The report also contains a description of the Niles No. 1 host unit, a discussion of conclusions and recommendations derived from the program, tabulation of data from parametric and long-term tests, and appendices which contain additional tabulated test results.

  1. Evaluation, engineering and development of advanced cyclone processes. Final separating media evaluation and test report (FSMER). Appendices

    SciTech Connect (OSTI)

    NONE

    1996-05-01T23:59:59.000Z

    This report consists of appendices pertaining to the separating media evaluation (calcium nitrate solution) and testing for an advanced cyclone process. Appendices include: materials safety data, aqueous medium regeneration, pH control strategy, and other notes and data.

  2. Expanding the operational envelope of compact cylindrical cyclone gas/liquid separators using a variable inlet-slot configuration

    E-Print Network [OSTI]

    Uvwo, Ighofasan

    2006-04-12T23:59:59.000Z

    Despite the numerous advantages associated with using compact cylindrical cyclone gas/liquid separators, particularly for upstream production operations, the lack of a full understanding of the complex hydrodynamic process taking place in it and its...

  3. Response of tropical sea surface temperature, precipitation, and tropical cyclone-related variables to changes in global and local forcing

    E-Print Network [OSTI]

    Sobel, Adam

    A single-column model is used to estimate the equilibrium response of sea surface temperature (SST), precipitation, and several variables related to tropical cyclone (TC) activity to changes in both local and global forcing. ...

  4. Expanding the operational envelope of compact cylindrical cyclone gas/liquid separators using a variable inlet-slot configuration

    E-Print Network [OSTI]

    Uvwo, Ighofasan

    2006-04-12T23:59:59.000Z

    Despite the numerous advantages associated with using compact cylindrical cyclone gas/liquid separators, particularly for upstream production operations, the lack of a full understanding of the complex hydrodynamic process ...

  5. Capacity-Achieving Ensembles of Accumulate-Repeat-Accumulate Codes for the

    E-Print Network [OSTI]

    Sason, Igal

    Capacity-Achieving Ensembles of Accumulate-Repeat-Accumulate Codes for the Erasure Channel-- The paper introduces ensembles of accumulate- repeat-accumulate (ARA) codes which asymptotically achieve by the first capacity-achieving ensembles of irregular repeat- accumulate (IRA) codes with bounded complexity

  6. The development of a cyclonic combustor for high particulate, low caloric value gas produced by a fluidized bed

    E-Print Network [OSTI]

    Cardenas, Manuel Moises

    1985-01-01T23:59:59.000Z

    fuel heating value. Performance plots are presented with either the inlet Reynolds number or the equivalence ratio of the inlet mixture as the independent variable. The cyclone combustor produced self-sustaining stable combustion of the LCV gas... to occur due to the large concentrations of nitrogen species in the fuel. The initial delivery system of the cyclone combustor plugged up with solid particles, however, filters eliminated the problem. Based upon the results of this investigation...

  7. Cross-equatorial influences of a South American cold surge on the development of two eastern North Pacific tropical cyclones

    E-Print Network [OSTI]

    Millier, Vicki Anne

    1989-01-01T23:59:59.000Z

    CROSS-EQUATORIAL INFLUENCES OF A SOUTH AMERICAN COLD SURGE ON THE DEVELOPMENT OF TWO EASTERN NORTH PACIFIC TROPICAL CYCLONES A Thesis by VICKI ANNE MILLIER Submitted to the Oflice of Graduate Studies of' Texas ASM University in partial fu...1611ment of the requirements for the degree of MASTER OF SCIENCE December 1989 Major Subject: Meteorology CROSS-EQUATORIAL INFLUENCES OF A SOUTH AMERICAN COLD SURGE ON THE DEVELOPMENT OF TWO EASTERN NORTH PACIFIC TROPICAL CYCLONES A Thesis...

  8. Determination of the thermodynamic performance of a bottom outlet cyclone steam-water separator for geothermal use

    E-Print Network [OSTI]

    Chappell, Mark Andrew

    1979-01-01T23:59:59.000Z

    DETERMINATION OF THE THERMODYNAMIC PERFORMANCE OF A BOTTOM OUTLET CYCLONE STEAN-MATER SEPARATOR FOR GEOTHERMAL USE A Thesis by Mark Andrew Chappell Submitted to the Graduate College of Texas AEM University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE December 1979 Major Subject: Mechanical Engineering DETERMINATION OF THE THERMODYNAMIC PERFORMANCE OF A BOTTOM OUTLET CYCLONE STEAM-WATER SEPARATOR FOR GEOTHERMAL USE A Thesis by Mark Andrew Chappell...

  9. The 2011 North Atlantic Hurricane Season A Climate Perspective

    E-Print Network [OSTI]

    Low-activity Era NOAA's Accumulated Cyclone Energy (ACE) Index May August 2011NOAA Outlooks 2011 165 Fig. 2. NOAA'sAccumulated seasonalAccumu- latedCycloneEnergy(ACE)value(Bell et al. 2000) was 127.1 x 104 kt2 , which Fig. 1.Tracks of Cyclone Energy (ACE) index expressed as percent of the 1981-2010 median value. ACE is calculated

  10. Tropical Cyclone Intensification from Asymmetric Convection: Energetics and Efficiency

    E-Print Network [OSTI]

    Nolan, David S.

    and some new methods of analysis. The model equations have been changed to be more consistent and available potential energies are presented for both asymmetric and symmetric motions, and these are used to quantify the flow of energy from localized, asymmetric heat sources to kinetic energy of the wind field

  11. Low NO sub x /SO sub x Burner retrofit for utility cyclone boilers

    SciTech Connect (OSTI)

    Not Available

    1991-09-01T23:59:59.000Z

    This Public Design Report provides available nonproprietary design information on the Low NO{sub x}SO{sub x} Burner Retrofit of Utility Cyclone Boilers project. In addition to the design aspects, the history of the project, the organization of the project, and the role of the funding parties are discussed. An overview of the Low NO{sub x}SO{sub x} (LNS) Burner, the cyclone boiler and the Southern Illinois Power Cooperative host site is presented. A detailed nonproprietary description of the individual process steps, plant systems, and resulting performance then follows. Narrative process descriptions, simplified process flow diagrams, input/output stream data, operating conditions and requirements are given for each unit. The plant demonstration program and start up provisions, the environmental considerations and control, monitoring and safety factors that are considered are also addressed.

  12. Connection between aluminium exclusion and accumulation in the aluminium accumulator buckwheat (Fagopyrum esculentum Moench)

    E-Print Network [OSTI]

    Klug, Benjamin; Horst, Walter J.

    2009-01-01T23:59:59.000Z

    in the root apex of the Al accumulator, buckwheat Material &membrane flux of Al in the Al accumulator, buckwheat. Ma and

  13. Impact of Aerosols on Tropical Cyclones: An Investigation Using Convection-permitting Model Simulation

    SciTech Connect (OSTI)

    Hazra, Anupam; Mukhopadhyay, P.; Taraphdar, Sourav; Chen, J. P.; Cotton, William R.

    2013-07-16T23:59:59.000Z

    The role of aerosols effect on two tropical cyclones over Bay of Bengal are investigated using a convection permitting model with two-moment mixed-phase bulk cloud microphysics scheme. The simulation results show the role of aerosol on the microphysical and dynamical properties of cloud and bring out the change in efficiency of the clouds in producing precipitation. The tracks of the TCs are hardly affected by the changing aerosol types, but the intensity exhibits significant sensitivity due to the change in aerosol contribution. It is also clearly seen from the analyses that higher heating in the middle troposphere within the cyclone center is in response to latent heat release as a consequence of greater graupel formation. Greater heating in the middle level is particularly noticeable for the clean aerosol regime which causes enhanced divergence in the upper level which, in turn, forces the lower level convergence. As a result, the cleaner aerosol perturbation is more unstable within the cyclone core and produces a more intense cyclone as compared to other two perturbations of aerosol. All these studies show the robustness of the concept of TC weakening by storm ingestion of high concentrations of CCN. The consistency of these model results gives us confidence in stating there is a high probability that ingestion of high CCN concentrations in a TC will lead to weakening of the storm but has little impact on storm direction. Moreover, as pollution is increasing over the Indian sub-continent, this study suggests pollution may be weakening TCs over the Bay of Bengal.

  14. Low NO sub x /SO sub x Burner retrofit for utility cyclone boilers

    SciTech Connect (OSTI)

    Not Available

    1990-01-01T23:59:59.000Z

    Cyclone furnaces operate with high excess air and at high temperature. The heat release during combustion is very high and as a result the boiler volume is much smaller than would be found in a conventional pc-fired system. The Marion Unit 1 boiler, at the level of the cyclone entry, has a small cross-section; about 5-feet in depth and about 20-feet in width. A boiler schematic showing the LNS Burner and relative location of the superheater region and overfire air ports is shown in Figure 1. The LNS Burner's combustion process is fundamentally different from that of the cyclone, and the combustion products are also different. The LNS Burner products enter the boiler as hot, fuel-rich gases. Additional overfire air must be added to complete this combustion step with care taken to avoid the formation of thermal NO{sub x}. If done correctly, S0{sub 2} is controlled and significant NO{sub x} reductions are achieved. Because of the small boiler volume, flow modelling was found to be necessary to insure that adequate mixing of LNS Burner combustion products with air can be accomplished to achieve NO{sub x} emissions goals. Design requirements for the air injection system for the Marion boiler were developed using FLUENT, a commercially available computational fluid dynamics (CFD) code. A series of runs were made to obtain a design for final air injection that met the process design goals as closely as possible.

  15. Metapopulation extinction caused by mutation accumulation

    E-Print Network [OSTI]

    Lynch, Michael

    Metapopulation extinction caused by mutation accumulation Kevin Higgins* and Michael Lynch Ecology suggests that the risk of extinction by mutation accumulation can be comparable to that by environmental to greatly accelerate the accumulation of mildly deleterious mutations, lowering the ge- netic effective size

  16. Reducing Power Dissipation in Pipelined Accumulators

    E-Print Network [OSTI]

    Nannarelli, Alberto

    Reducing Power Dissipation in Pipelined Accumulators Gian Carlo Cardarilli(1), Alberto Nannarelli(2 Informatics, Technical University of Denmark, Kongens Lyngby, Denmark Abstract-- Fast accumulation is required). Accumulators nec- essary for DDFS are then deeply pipelined down to the bit-level with two main consequences

  17. Geometrical accumulations and computably enumerable real numbers

    E-Print Network [OSTI]

    Durand-Lose, Jérôme

    Geometrical accumulations and computably enumerable real numbers (extended abstract) J and space are continuous and accumulations can be devised to unlimitedly accelerate a computation with rational numbers for coordinates and speeds, the time of any accumulation is a c.e. (compu- tably

  18. NATIONAL HURRICANE CENTERNATIONAL HURRICANE CENTER Overview of the

    E-Print Network [OSTI]

    hours. · The "Accumulated Cyclone Energy" (ACE) for the season was 285% of median ­ the highest value hurricane - 882 mb. The central pressure of Wilma fell 88 mb in 12 hours. · The "Accumulated Cyclone Energy" (ACE) for the season was 285% of median ­ the highest value of record for an Atlantic hurricane season

  19. Advanced In-Furnace NOx Control for Wall and Cyclone-Fired Boilers

    SciTech Connect (OSTI)

    Hamid Sarv

    2009-02-28T23:59:59.000Z

    A NO{sub x} minimization strategy for coal-burning wall-fired and cyclone boilers was developed that included deep air staging, innovative oxygen use, reburning, and advanced combustion control enhancements. Computational fluid dynamics modeling was applied to refine and select the best arrangements. Pilot-scale tests were conducted by firing an eastern high-volatile bituminous Pittsburgh No.8 coal at 5 million Btu/hr in a facility that was set up with two-level overfire air (OFA) ports. In the wall-fired mode, pulverized coal was burned in a geometrically scaled down version of the B and W DRB-4Z{reg_sign} low-NO{sub x} burner. At a fixed overall excess air level of 17%, NO{sub x} emissions with single-level OFA ports were around 0.32 lb/million Btu at 0.80 burner stoichiometry. Two-level OFA operation lowered the NO{sub x} levels to 0.25 lb/million Btu. Oxygen enrichment in the staged burner reduced the NO{sub x} values to 0.21 lb/million Btu. Oxygen enrichment plus reburning and 2-level OFA operation further curbed the NO{sub x} emissions to 0.19 lb/million Btu or by 41% from conventional air-staged operation with single-level OFA ports. In the cyclone firing arrangement, oxygen enrichment of the cyclone combustor enabled high-temperature and deeply staged operation while maintaining good slag tapping. Firing the Pittsburgh No.8 coal in the optimum arrangement generated 112 ppmv NO{sub x} (0.15 lb/million Btu) and 59 ppmv CO. The optimum emissions results represent 88% NO{sub x} reduction from the uncontrolled operation. Levelized costs for additional NO{sub x} removal by various in-furnace control methods in reference wall-fired or cyclone-fired units already equipped with single-level OFA ports were estimated and compared with figures for SCR systems achieving 0.1 lb NO{sub x}/10{sup 6} Btu. Two-level OFA ports could offer the most economical approach for moderate NO{sub x} control, especially for smaller units. O{sub 2} enrichment in combination with 2-level OFA was not cost effective for wall-firing. For cyclone units, NO{sub x} removal by two-level OFA plus O{sub 2} enrichment but without coal reburning was economically attractive.

  20. Perception as evidence accumulation 1 Perception as evidence accumulation and Bayesian inference

    E-Print Network [OSTI]

    Norris, Dennis

    Perception as evidence accumulation 1 Perception as evidence accumulation and Bayesian inference.norris@mrc-cbu.cam.ac.uk #12;Perception as evidence accumulation 2 Abstract In this paper we argue that perception is Bayesian inference based on accumulation of noisy evidence and that, in masked priming, the perceptual system

  1. Deviations from Berry--Robnik Distribution Caused by Spectral Accumulation

    E-Print Network [OSTI]

    H. Makino; S. Tasaki

    2004-03-26T23:59:59.000Z

    By extending the Berry--Robnik approach for the nearly integrable quantum systems,\\cite{[1]} we propose one possible scenario of the energy level spacing distribution that deviates from the Berry--Robnik distribution. The result described in this paper implies that deviations from the Berry--Robnik distribution would arise when energy level components show strong accumulation, and otherwise, the level spacing distribution agrees with the Berry--Robnik distribution.

  2. Ship and satellite observations of chlorophyl stocks in interacting cyclone-anticyclone eddy pairs in the western Gulf of Mexico

    SciTech Connect (OSTI)

    Biggs, D.C. [Texas A& M Univ., College Station, TX (United States)] [Texas A& M Univ., College Station, TX (United States); Mueller-Karger, F.E. [Univ. of South Florida, St. Petersburg, FL (United States)] [Univ. of South Florida, St. Petersburg, FL (United States)

    1994-04-15T23:59:59.000Z

    When anticyclonic eddies shed by the Loop Current of the Gulf of Mexico reach the western margin of the gulf, they influence the surface circulation over the continental slope and rise. Of particular interest is the generation of cyclone (cold-core)- anticyclone (warm-core) pairs when aging Loop Current eddies interact with the continental margin. In this paper the authors describe the physical and biological characteristics of these cyclone-anticyclone pairs. Their objective was to determine how eddy pairs affect the distribution of phytoplankton in the region and how satellite ocean color measurements are applicable to tracing of the eddies. They present shipboard data collected between 1980 and 1982 on the hydrography, chlorophyll stocks, and nutrient concentrations of eddy pairs in the western Gulf of Mexico and compare these data with coastal zone color scanner (CZCS) images collected during the time frame of the cruises. Surface pigment concentrations followed a seasonal cycle, with low concentrations (0.05-0.1 mg m{sup {minus}3}) found within cyclones and anticyclones from April through early November and higher concentrations (>0.1 mg m{sup {minus}3}) found in the winter. CZCS pigment concentrations were locally high in the flow confluence of cyclone-anticyclone pairs. The CZCS imagery shows that some cyclone-anticyclone geometries transport high-chlorophyll shelf water seaward at least 100-200 km off-shelf. 46 figs., 9 figs., 3 tabs.

  3. DOE - Office of Legacy Management -- Carnegie-Mellon Institute Cyclone

    Office of Legacy Management (LM)

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTable ofArizonaBuffalo - NYBowen Lab -C-Bof Genetics -

  4. Cyclone Performance for Reducing Biochar Concentrations in Syngas

    E-Print Network [OSTI]

    Saucier, David Shane

    2013-05-28T23:59:59.000Z

    /kg (7000 Btu/lb.). CGT has the potential to serve as a renewable energy source. Gasification of biomasses such as CGT can offer processing facilities the opportunity to transform their waste biomass into electricity. The gasification of CGT yields 80...

  5. Convective-Scale Variations in the Inner-Core Rainbands of a Tropical Cyclone ANTHONY C. DIDLAKE JR. AND ROBERT A. HOUZE JR.

    E-Print Network [OSTI]

    Houze Jr., Robert A.

    Convective-Scale Variations in the Inner-Core Rainbands of a Tropical Cyclone ANTHONY C. DIDLAKE JR secondary eyewall forms at a certain radius, subsidence occurring along its inner edge separates it from the primary eyewall. 1. Introduction Improving intensity forecasts of tropical cyclones al- most certainly

  6. Convective-scale variations in the inner-core rainbands of a tropical cyclone Submitted for publication in Journal of the Atmospheric Sciences

    E-Print Network [OSTI]

    Houze Jr., Robert A.

    Convective-scale variations in the inner-core rainbands of a tropical cyclone Submitted inner edge separates it from the primary eyewall. #12;3 1. Introduction Improving intensity forecasts of tropical cyclones almost certainly requires a better understanding of the structure and dynamics

  7. Modulation of North Pacific Tropical Cyclone Activity by Three Phases of ENSO HYE-MI KIM, PETER J. WEBSTER, AND JUDITH A. CURRY

    E-Print Network [OSTI]

    Webster, Peter J.

    Modulation of North Pacific Tropical Cyclone Activity by Three Phases of ENSO HYE-MI KIM, PETER J Pacific Ocean warming has been separated into two modes based on the spatial distribution of the maximum impacts on tropical cyclone (TC) activity over the North Pacific by differential modulation of both local

  8. Quantum gravity and inventory accumulation

    E-Print Network [OSTI]

    Scott Sheffield

    2011-08-10T23:59:59.000Z

    We begin by studying inventory accumulation at a LIFO (last-in-first-out) retailer with two products. In the simplest version, the following occur with equal probability at each time step: first product ordered, first product produced, second product ordered, second product produced. The inventory thus evolves as a simple random walk on Z^2. In more interesting versions, a p fraction of customers orders the "freshest available" product regardless of type. We show that the corresponding random walks scale to Brownian motions with diffusion matrices depending on p. We then turn our attention to the critical Fortuin-Kastelyn random planar map model, which gives, for each q>0, a probability measure on random (discretized) two-dimensional surfaces decorated by loops, related to the q-state Potts model. A longstanding open problem is to show that as the discretization gets finer, the surfaces converge in law to a limiting (loop-decorated) random surface. The limit is expected to be a Liouville quantum gravity surface decorated by a conformal loop ensemble, with parameters depending on q. Thanks to a bijection between decorated planar maps and inventory trajectories (closely related to bijections of Bernardi and Mullin), our results about the latter imply convergence of the former in a particular topology. A phase transition occurs at p = 1/2, q=4.

  9. The Role of Moist Processes in the Intrinsic Predictability of Indian Ocean Cyclones

    SciTech Connect (OSTI)

    Taraphdar, Sourav; Mukhopadhyay, P.; Leung, Lai-Yung R.; Zhang, Fuqing; Abhilash, S.; Goswami, B. N.

    2014-07-16T23:59:59.000Z

    The role of moist processes and the possibility of error cascade from cloud scale processes affecting the intrinsic predictable time scale of a high resolution convection permitting model within the environment of tropical cyclones (TCs) over the Indian region are investigated. Consistent with past studies of extra-tropical cyclones, it is demonstrated that moist processes play a major role in forecast error growth which may ultimately limit the intrinsic predictability of the TCs. Small errors in the initial conditions may grow rapidly and cascades from smaller scales to the larger scales through strong diabatic heating and nonlinearities associated with moist convection. Results from a suite of twin perturbation experiments for four tropical cyclones suggest that the error growth is significantly higher in cloud permitting simulation at 3.3 km resolutions compared to simulations at 3.3 km and 10 km resolution with parameterized convection. Convective parameterizations with prescribed convective time scales typically longer than the model time step allows the effects of microphysical tendencies to average out so convection responds to a smoother dynamical forcing. Without convective parameterizations, the finer-scale instabilities resolved at 3.3 km resolution and stronger vertical motion that results from the cloud microphysical parameterizations removing super-saturation at each model time step can ultimately feed the error growth in convection permitting simulations. This implies that careful considerations and/or improvements in cloud parameterizations are needed if numerical predictions are to be improved through increased model resolution. Rapid upscale error growth from convective scales may ultimately limit the intrinsic mesoscale predictability of the TCs, which further supports the needs for probabilistic forecasts of these events, even at the mesoscales.

  10. Computing downwards accumulations on trees quickly Jeremy Gibbons

    E-Print Network [OSTI]

    Gibbons, Jeremy

    Computing downwards accumulations on trees quickly Jeremy Gibbons Abstract. Downwards accumulations the leaves. Under certain conditions, a downwards accumulation is both `efficient' (computable in fact yield a stronger conclusion: the accumulation can be computed in parallel time proportional

  11. Composition and chemistry of particulates from the Tidd Clean Coal Demonstration Plant pressurized fluidized bed combustor, cyclone, and filter vessel

    SciTech Connect (OSTI)

    Smith, D.H.; Grimm, U.; Haddad, G.

    1995-12-31T23:59:59.000Z

    In a Pressurized Fluidized Bed Combustion (PFBC)/cyclone/filter system ground coal and sorbent are injected as pastes into the PFBC bed; the hot gases and entrained fine particles of ash and calcined or reacted sorbent are passed through a cyclone (which removes the larger entrained particles); and the very-fine particles that remain are then filtered out, so that the cleaned hot gas can be sent through a non-ruggedized hot-gas turbine. The 70 MWe Tidd PFBC Demonstration Plant in Brilliant, Ohio was completed in late 1990. The initial design utilized seven strings of primary and secondary cyclones to remove 98% of the particulate matter. However, the Plant also included a pressurized filter vessel, placed between the primary and secondary cyclones of one of the seven strings. Coal and dolomitic limestone (i.e, SO{sub 2} sorbent) of various nominal sizes ranging from 12 to 18 mesh were injected into the combustor operating at about 10 atm pressure and 925{degree}C. The cyclone removed elutriated particles larger than about 0.025 mm, and particles larger than ca. 0.0005 mm were filtered at about 750{degree}C by ceramic candle filters. Thus, the chemical reaction times and temperatures, masses of material, particle-size distributions, and chemical compositions were substantially different for particulates removed from the bed drain, the cyclone drain, and the filter unit. Accordingly, we have measured the particle-size distributions and concentrations of calcium, magnesium, sulfur, silicon, and aluminum for material taken from the three units, and also determined the chemical formulas and predominant crystalline forms of the calcium and magnesium sulfate compounds formed. The latter information is particularly novel for the filter-cake material, from which we isolated the ``new`` compound Mg{sub 2}Ca(SO{sub 4}){sub 3}.

  12. Cyclone aerosol sampling and particle deposition in tubing elements following elbow bends

    E-Print Network [OSTI]

    Wente, William Baker

    1995-01-01T23:59:59.000Z

    . Nuclear Regulatory Commission under grant NRC-04-94-099 and by the U. S. Environmental Protection Agency. Dr. Steven McGuire is the project officer for NRC and Mr. Robert K. Stevens is the project officer for EPA. Partial funding for the interaction... appreciated. Their views on life and bow to live have hopefully influenced me to be a better person, for their lives could stand as a role model for everyone. ACKNOWLEDGMENTS Funding for the ambient cyclonic sampling projects was provided by the U. S...

  13. Low No sub x /SO sub x burner retrofit for utility cyclone boilers

    SciTech Connect (OSTI)

    Moore, K.; Martin, L.; Smith, J.

    1991-05-01T23:59:59.000Z

    The Low NO{sub x}/SO{sub x} (LNS) Burner Retrofit for Utility Cyclone Boilers program consists of the retrofit and subsequent demonstration of the technology at Southern Illinois Power Cooperative's (SIPC's) 33-MW unit 1 cyclone boiler located near Marion, Illinois. The LNS Burner employs a simple innovative combustion process burning high-sulfur Illinois coal to provide substantial SO{sub 2} and NO{sub x} control within the burner. A complete series of boiler performance and characterization tests, called the baseline tests, was conducted in October 1990 on unit 1 of SIPC's Marion Station. The primary objective of the baseline test was to collect data from the existing plant that could provide a comparison of performance after the LNS Burner retrofit. These data could confirm the LNS Burner's SO{sub x} and NO{sub x} emissions control and any effect on boiler operation. Further, these tests would provide to the project experience with the operating characteristics of the host unit as well as engineering design information to minimize technical uncertainties in the application of the LNS Burner technology.

  14. Modeling High-Impact Weather and Climate: Lessons From a Tropical Cyclone Perspective

    SciTech Connect (OSTI)

    Done, James; Holland, Greg; Bruyere, Cindy; Leung, Lai-Yung R.; Suzuki-Parker, Asuka

    2013-10-19T23:59:59.000Z

    Although the societal impact of a weather event increases with the rarity of the event, our current ability to assess extreme events and their impacts is limited by not only rarity but also by current model fidelity and a lack of understanding of the underlying physical processes. This challenge is driving fresh approaches to assess high-impact weather and climate. Recent lessons learned in modeling high-impact weather and climate are presented using the case of tropical cyclones as an illustrative example. Through examples using the Nested Regional Climate Model to dynamically downscale large-scale climate data the need to treat bias in the driving data is illustrated. Domain size, location, and resolution are also shown to be critical and should be guided by the need to: include relevant regional climate physical processes; resolve key impact parameters; and to accurately simulate the response to changes in external forcing. The notion of sufficient model resolution is introduced together with the added value in combining dynamical and statistical assessments to fill out the parent distribution of high-impact parameters. Finally, through the example of a tropical cyclone damage index, direct impact assessments are resented as powerful tools that distill complex datasets into concise statements on likely impact, and as highly effective communication devices.

  15. Finding Tropical Cyclones on a Cloud Computing Cluster: Using Parallel Virtualization for Large-Scale Climate Simulation Analysis

    SciTech Connect (OSTI)

    Hasenkamp, Daren; Sim, Alexander; Wehner, Michael; Wu, Kesheng

    2010-09-30T23:59:59.000Z

    Extensive computing power has been used to tackle issues such as climate changes, fusion energy, and other pressing scientific challenges. These computations produce a tremendous amount of data; however, many of the data analysis programs currently only run a single processor. In this work, we explore the possibility of using the emerging cloud computing platform to parallelize such sequential data analysis tasks. As a proof of concept, we wrap a program for analyzing trends of tropical cyclones in a set of virtual machines (VMs). This approach allows the user to keep their familiar data analysis environment in the VMs, while we provide the coordination and data transfer services to ensure the necessary input and output are directed to the desired locations. This work extensively exercises the networking capability of the cloud computing systems and has revealed a number of weaknesses in the current cloud system software. In our tests, we are able to scale the parallel data analysis job to a modest number of VMs and achieve a speedup that is comparable to running the same analysis task using MPI. However, compared to MPI based parallelization, the cloud-based approach has a number of advantages. The cloud-based approach is more flexible because the VMs can capture arbitrary software dependencies without requiring the user to rewrite their programs. The cloud-based approach is also more resilient to failure; as long as a single VM is running, it can make progress while as soon as one MPI node fails the whole analysis job fails. In short, this initial work demonstrates that a cloud computing system is a viable platform for distributed scientific data analyses traditionally conducted on dedicated supercomputing systems.

  16. PFB coal fired combined cycle development program. Advanced hot gas cleanup concept evaluation (Task 4. 3). Volume B. Developmental cyclone evaluation

    SciTech Connect (OSTI)

    Not Available

    1980-02-01T23:59:59.000Z

    This report summarizes the results of cold flow model testing of a conventional reverse-flow cyclone containing several developmental features designed to improve its separative performance. The four advanced features evaluated were: Outlet Scroll Skimming - to remove particles from the high dust concentration region at the periphery of the outlet dust; Base Purge - to reduce reentrainment of dust from the disengagement hopper; Increased Outlet Duct Engagement - to reduce short-circuiting of the inlet dust into the outlet; and Vortex Shield - to stabilize the point of vortex attachment at the cyclone base and thus reduce base pickup. A schematic of the advanced cyclone, showing the various developmental features, is provided. The results of the cold flow experiments showed that substantial improvement (approximately 30% reduction in exhaust emission) could be obtained from outlet skimming or from increased engagement of the exhaust dust. Furthermore, the effects of these features are additive so that about 60% overall reduction in emissions could be achieved by incorporating both of these elements. On the other hand, the vortex shield and the base purge had little effect on the separative performance. Almost all of the experimental results exhibited strong electrostatic influence. At high flowrates, the separative performance of the cyclone decreased as the flowrate was reduced, as expected from cyclone theory. Although the improvements obtained with the developmental cyclone are significant, further improvements appear possible with the Air Shield cyclone and the Electrocyclone. Consequently, subsequent efforts under the CFCC program were focused on these concepts.

  17. PFB coal fired combined cycle development program. Advanced hot gas cleanup concept evaluation (Task 4. 3). Volume A. Aerodyne cyclone evaluation

    SciTech Connect (OSTI)

    Not Available

    1980-11-01T23:59:59.000Z

    This report summarizes the results of testing of a rotary flow cyclone, manufactured by Aerodyne Development Corporation under license by Siemens Kraftwerk Union. This cyclone was selected for evaluation due to the unusually high separative efficiencies claimed by the manufacturer (based on developer data), and relative lack of open literature data. The most significant finding of this work was the observation that electrostatic forces could enhance or, in fact, dominate the separation process. Separative efficiencies, with electrostatic forces present, were found to be substantially independent of flow rate and, by inference, could be independent of unit size. This finding suggests that large cyclones with natural or augmented electrostatic forces employed in the hot gas cleanup train of the CFCC system may not suffer the performance degradation compared to small cyclones, as projected from conventional inertial theory. This is of special importance since the use of many small cyclones in parallel, or multicyclones, commonly suffers from fouling and this approach is not recommended in the CFCC application. The original objective of this investigation was to assess the relative merits of the Aerodyne cyclone separator. It was found from both the cold flow and the hot flow tests that its separative efficiencies are disappointingly poorer than expectations (in agreement with Westinghouse results), and even poorer than conventional cyclones.

  18. WINDSAT RETRIEVAL OF OCEAN SURFACE WIND SPEEDS IN TROPICAL CYCLONES Amanda Mims, Rachael Kroodsma, Christopher Ruf, Darren McKague

    E-Print Network [OSTI]

    Ruf, Christopher

    of emissivity on wind speed up to category 3 hurricane-force winds. 1. INTRODUCTION The microwave emissivity and horizontally polarized emissivity versus wind speed at hurricane force winds. 2. SATELLITE AND GROUNDBASEDWINDSAT RETRIEVAL OF OCEAN SURFACE WIND SPEEDS IN TROPICAL CYCLONES Amanda Mims, Rachael Kroodsma

  19. Sensitivity of Tropical Cyclone Intensity to Ventilation in an Axisymmetric Model National Center for Atmospheric Research,* Boulder, Colorado

    E-Print Network [OSTI]

    Tang, Brian

    into the boundary layer. The sensitivity of tropical cyclone intensity to ventilation can be viewed in the context mixing above the boundary layer. In the latter, ventilation weakens the eyewall entropy front, resulting, an oscillatory intensity regime materializes and is tied to transient convective bursts and strong downdrafts

  20. Mathematical and experimental pilot-scale study of coal reburning for NO sub x control in cyclone boilers

    SciTech Connect (OSTI)

    Farzan, H.; Wessel, R.A.

    1991-06-01T23:59:59.000Z

    The purpose of this pilot-scale study was to examine the effectiveness of reburning for NO{sub x} reduction and to assess the potential side effects. In addition, the potential of a high-sulfur Illinois coal for cyclone reburning application was evaluated. (VC)

  1. Cyclone-anticyclone asymmetry of large-scale wakes in the laboratory G. Perret, A. Stegner, and M. Farge

    E-Print Network [OSTI]

    Stegner Alexandre

    extreme cases, coherent cyclones do not emerge at all, and only an anticyclonic vortex street appears.6. Hence, we found that a large-scale wake could differ strongly from the classical Karman street when elongated. In the Earth's ocean, large-scale eddies such as submesoscale coherent vortex,5 meddies

  2. Low NO{sub x}/SO{sub x} Burner retrofit for utility cyclone boilers. Quarterly technical progress report, June--September 1990

    SciTech Connect (OSTI)

    Not Available

    1990-12-31T23:59:59.000Z

    The objective of this project is to demonstrate the LNS Burner as retrofitted to the host cyclone boiler for effective low-cost control of NO{sub x} and SO{sub x} emissions while firing a bituminous coal. The LNS Burner employs a simple, innovative combustion process to burn pulverized coal at high temperatures and provides effective, low-cost control of sulfur dioxide (SO{sub 2}) and nitrogen oxides (NO{sub x}) emissions. The coal ash contains sulfur and is removed in the form of molten slag and flyash. Cyclone-fired boiler units are typically older units firing high-sulfur bituminous coals at very high temperatures which results in very high NO{sub x} and SO{sub x} emissions. The addition of conventional emission control equipment, such as wet scrubbers, to these older cyclone units in order to meet current and future environmental regulations is generally not economic. Further, the units are generally not compatible with low sulfur coal switching for S0{sub 2} control or selective catalytic reduction technologies for NO{sub x} control. Because the LNS Burner operates at the same very high temperatures as a typical cyclone boiler and produces a similar slag product, it may offer a viable retrofit option for cyclone boiler emission control. This was confirmed by the Cyclone Boiler Retrofit Feasibility Study carried out by TransAlta and an Operating Committee formed of cyclone boiler owners in 1989. An existing utility cyclone boiler, was then selected for the evaluation of the cost and performance study. It was concluded that the LNS Burner retrofit would be a cost-effective option for control of cyclone boiler emissions. A full-scale demonstration of the LNS Burner retrofit was selected in October 1988 as part of the DOE`s Clean Coal Technology Program Round II.

  3. High-Resolution Modeling to Assess Tropical Cyclone Activity in Future Climate Regimes

    SciTech Connect (OSTI)

    Lackmann, Gary

    2013-06-10T23:59:59.000Z

    Applied research is proposed with the following objectives: (i) to determine the most likely level of tropical cyclone intensity and frequency in future climate regimes, (ii) to provide a quantitative measure of uncertainty in these predictions, and (iii) to improve understanding of the linkage between tropical cyclones and the planetary-scale circulation. Current mesoscale weather forecasting models, such as the Weather Research and Forecasting (WRF) model, are capable of simulating the full intensity of tropical cyclones (TC) with realistic structures. However, in order to accurately represent both the primary and secondary circulations in these systems, model simulations must be configured with sufficient resolution to explicitly represent convection (omitting the convective parameterization scheme). Most previous numerical studies of TC activity at seasonal and longer time scales have not utilized such explicit convection (EC) model runs. Here, we propose to employ the moving nest capability of WRF to optimally represent TC activity on a seasonal scale using a downscaling approach. The statistical results of a suite of these high-resolution TC simulations will yield a realistic representation of TC intensity on a seasonal basis, while at the same time allowing analysis of the feedback that TCs exert on the larger-scale climate system. Experiments will be driven with analyzed lateral boundary conditions for several recent Atlantic seasons, spanning a range of activity levels and TC track patterns. Results of the ensemble of WRF simulations will then be compared to analyzed TC data in order to determine the extent to which this modeling setup can reproduce recent levels of TC activity. Next, the boundary conditions (sea-surface temperature, tropopause height, and thermal/moisture profiles) from the recent seasons will be altered in a manner consistent with various future GCM/RCM scenarios, but that preserves the large-scale shear and incipient disturbance activity. This will allow (i) a direct comparison of future TC activity that could be expected for an active or inactive season in an altered climate regime, and (ii) a measure of the level of uncertainty and variability in TC activity resulting from different carbon emission scenarios.

  4. Public Health Benefits of End-Use Electrical Energy Efficiency in California: An Exploratory Study

    E-Print Network [OSTI]

    McKone, Thomas E.

    2011-01-01T23:59:59.000Z

    either multiple cyclone, scrubber, ESP, or baghouse); Pc,either multiple cyclone, scrubber, ESP, or baghouses); PC,either multiple cyclone, scrubber, ESP, or baghouse) and PC,

  5. Increase in the Intensity of Postmonsoon Bay of Bengal Tropical Cyclones

    SciTech Connect (OSTI)

    Balaguru, Karthik; Taraphdar, Sourav; Leung, Lai-Yung R.; Foltz, Gregory R.

    2014-05-28T23:59:59.000Z

    The post-monsoon (October-November) tropical cyclone (TC) season in the Bay of Bengal has spawned many of the deadliest storms in recorded history. Here it is shown that the intensity of post-monsoon Bay of Bengal TCs, and the contribution of major TCs to total TC power, increased during 1981-2010. It is found that changes in environmental parameters are responsible for the observed increases in TC intensity. Increases in sea surface temperature and upper ocean heat content made the ocean more conducive to TC development, while enhanced convective instability made the atmosphere more favorable for the growth of TCs. The largest changes in the atmosphere and ocean occurred in the eastern Bay of Bengal, where nearly all major TCs form. These changes are part of positive linear trends, suggesting that the intensity of post-monsoon Bay of Bengal TCs may continue to increase in the future.

  6. Performance Analysis of Accumulator-based Revocation Mechanisms

    E-Print Network [OSTI]

    Boyer, Edmond

    Performance Analysis of Accumulator-based Revocation Mechanisms Jorn Lapon1, Markulf Kohlweiss3 issues is the efficient revocation of anonymous credentials. Currently, accumulator based re- vocation- cations. Keywords: Anonymous Credentials, Revocation, Accumulators 1 Introduction In an increasing

  7. Short communication Limits to deficit accumulation in elderly people

    E-Print Network [OSTI]

    Mitnitski, Arnold B.

    Short communication Limits to deficit accumulation in elderly people Kenneth Rockwood *, Arnold We evaluated limits to the accumulation of deficits (symptoms, diseases, disabilities) for 33 which, even in developed countries, further deficit accumulation is not sustainable. # 2006 Elsevier

  8. PFB Coal Fired Combined Cycle Development Program. Advanced hot gas cleanup concept evaluation (Task 4. 3). Volume A. Aerodyne cyclone evaluation

    SciTech Connect (OSTI)

    Not Available

    1980-02-01T23:59:59.000Z

    This report summarizes the results of testing of a rotary flow cyclone, manufactured by Aerodyne Development Corporation under license by Siemens Kraftwerk Union. This cyclone was selected for evaluation due to the unusually high separative efficiencies claimed by the manufacturer (based on developer data), and relative lack of open literature data. The most significant finding of this work was the observation that electrostatic forces could enhance or, in fact, dominate the separation process. Separative efficiencies, with electrostatic forces present, were found to be substantially independent of flow rate and, by inference, could be independent of unit size. Hence this finding offers a major hope that large cyclones employed in the hot gas cleanup train of the CFCC system may not suffer the performance degradation compared to small cyclones, as projected from conventional inertial theory. The separative efficiencies of the Aerodyne cyclone separator were found from both the cold flow and the hot flow tests to be disappointingly poorer than expectations (in agreement with Westinghouse results), and even poorer than conventional cyclones. (LTN)

  9. The 2004 North Atlantic Hurricane Season A Climate Perspective

    E-Print Network [OSTI]

    Administration's(NOAA's)AccumulatedCyclone Energy (ACE) index (Bell et al. 2004), which ac- counts Favorable AEJEnhanced Cyclonic Circulation Low Vertical Shear #12;2 calstorm(Bonnie)andfourashurri- canes for the combined strength and duration of tropical storms and hurricanes during a given sea- son. This wind energy

  10. Low NO{sub x}/SO{sub x} Burner retrofit for utility cyclone boilers. Public design report

    SciTech Connect (OSTI)

    Not Available

    1991-09-01T23:59:59.000Z

    This Public Design Report provides available nonproprietary design information on the Low NO{sub x}SO{sub x} Burner Retrofit of Utility Cyclone Boilers project. In addition to the design aspects, the history of the project, the organization of the project, and the role of the funding parties are discussed. An overview of the Low NO{sub x}SO{sub x} (LNS) Burner, the cyclone boiler and the Southern Illinois Power Cooperative host site is presented. A detailed nonproprietary description of the individual process steps, plant systems, and resulting performance then follows. Narrative process descriptions, simplified process flow diagrams, input/output stream data, operating conditions and requirements are given for each unit. The plant demonstration program and start up provisions, the environmental considerations and control, monitoring and safety factors that are considered are also addressed.

  11. Control of fine particulate emissions from coal-fired utility boilers: Spin filter collection device (rotary cyclone)

    SciTech Connect (OSTI)

    He, Bo X.

    1990-01-01T23:59:59.000Z

    A bench-scale test program has been performed to evaluate the concept of placing a porous cylindrical surface (such as a metal screen) at the core of a container and spinning the surface with an external motor for fine particulate/gas separation. The rotating surface enhances the centrifugal effects in the annular region and provides a smooth transition between the flow in the annular and core regions and acts like an enhanced cyclone. It is therefore called a rotary cyclone.'' The porous surface is self-cleaning and offers good steady-state pressure drop characteristics. Objectives of this project are: (1) to carry out theoretical and experimental investigations using the rotary cyclone concept to capture particulates in the 0.5 to 10 micron size range; and (2) to evaluate its economic feasibility based on an engineering scale-up and comparison with conventional fabric filter and electrostatic precipitator systems. It was demonstrated that the efficiency in separating fine particulates is governed by two major characteristics, i.e., the magnitude of the centrifugal force and the approach velocity or the gas-to-surface area ratio. Results from the bench-scale tests have shown a collection efficiency of well over 99% for a typical fly ash. A preliminary conceptual design for a 40 MW installation was developed based on the experimental work. 4 refs., 4 figs., 8 tabs.

  12. Efficient wavefunction propagation by minimizing accumulated action

    E-Print Network [OSTI]

    Zachary B. Walters

    2011-08-08T23:59:59.000Z

    This paper presents a new technique to calculate the evolution of a quantum wavefunction in a chosen spatial basis by minimizing the accumulated action. Introduction of a finite temporal basis reduces the problem to a set of linear equations, while an appropriate choice of temporal basis set offers improved convergence relative to methods based on matrix exponentiation for a class of physically relevant problems.

  13. Calibration of Accumulator and Debuncher Scrapers

    SciTech Connect (OSTI)

    Ellerbrock, A.; Werkema, S.; Wisner, B.; /Fermilab

    1992-03-30T23:59:59.000Z

    During the past week a careful calibration of the accumulator and debuncher scrapers was made. The procedure was to measure the actual scraper movement relative to some fixed external reference point with a caliper while observing the readback of the associated ACNET device on a VAX console. The results of this calibration are summarized.

  14. Dynamic Accumulators and Application to Efficient Revocation of Anonymous Credentials

    E-Print Network [OSTI]

    Lysyanskaya, Anna

    Dynamic Accumulators and Application to Efficient Revocation of Anonymous Credentials Abstract An accumulator scheme, as introduced by Benaloh and de Mare [BdM94] and further studied by Bari??c and Pfitzmann the accumulator, such that there is a (short) witness that a given input was incorporated into the accumulator

  15. Genetic Network Programming based Rule Accumulation for Agent Control

    E-Print Network [OSTI]

    Fernandez, Thomas

    1 Genetic Network Programming based Rule Accumulation for Agent Control Lutao WANG 2013, THEN Genetic Network Programming with Rule Accumulation(GNP-RA)GNP GNP-RA GNP GNP-RAGNP-RA GNP with Multi-Order Rule Accumulation(GNP-MRA), GNP with Rule Accumulation and Pruning(GNP-RAP), GNP

  16. Response times from ensembles of accumulators Bram Zandbelt1

    E-Print Network [OSTI]

    Palmeri, Thomas

    Response times from ensembles of accumulators Bram Zandbelt1 , Braden A. Purcell1 , Thomas J accumulator models and by neurophysiologists through the activity of neurons believed to instantiate be explained by a single model accumulator arise from numerous, redundant accumulator neurons, each of which

  17. Dynamic Accumulators and Application to Efficient Revocation of Anonymous Credentials

    E-Print Network [OSTI]

    Lysyanskaya, Anna

    Dynamic Accumulators and Application to Efficient Revocation of Anonymous Credentials Jan Camenisch An accumulator scheme, as introduced by Benaloh and de Mare [BdM94] and further studied by Bari´c and Pfitzmann the accumulator, such that there is a (short) witness that a given input was incorporated into the accumulator

  18. Selenium Accumulation in Brassicaceae Plant Species and its Biotransfer to Insect Pollinators

    E-Print Network [OSTI]

    Hladun, Kristen

    2012-01-01T23:59:59.000Z

    a cost to accumulating Se in secondary accumulator plants.In secondary accumulator plants, selenate can be reduced toelements found in non-accumulator plants (Brown and Shrift

  19. EXTENDED RANGE FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2010

    E-Print Network [OSTI]

    Gray, William

    Energy (ACE) (96.1) 100-162 150 Net Tropical Cyclone Activity (NTC) (100%) 108-172 160 PROBABILITIES-39 35 Major Hurricanes (MH) (2.3) 3-5 4 Major Hurricane Days (MHD) (5.0) 6-12 10 Accumulated Cyclone-to-year variability of any of the global tropical cyclone basins. People are curious to know how active the upcoming

  20. Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part I: Satellite Data Analyses*

    E-Print Network [OSTI]

    Li, Tim

    Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part with the Rossby wave energy dispersion of a preexisting TC. The wave trains are oriented in a northwest induced by tropical cyclone (TC) energy dispersion are revealed based on the Quick Scatterometer (Quik

  1. Coal Reburning for Cyclone Boiler NO[sub x] Control Demonstration

    SciTech Connect (OSTI)

    Not Available

    1992-12-18T23:59:59.000Z

    The Coal Reburning for Cyclone Boiler NO[sub x], Control Demonstration project progress for July, August, and September 1992 is identified in this tenth quarterly report and pertains to the on-going activities of Phase III Operation and Disposition. The project involves retrofitting/testing the reburning technology at Wisconsin Power Light's 100 MWe Nelson Dewey Unit [number sign]2 in Cassville, Wisconsin to determine the commercial applicability of this technology to reduce NO[sub x] emission levels. Phase III activities emphasized continuation of long-term testing. WP L is operating the reburn system in full automatic in a load following mode, using Lamar coal, which is an Indiana bituminous medium sulfur content fuel. Reductions in NO[sub x] emissions continue at the 50%+ level with no apparent significant adverse impacts to boiler operation. As of the end of September, a second set of performance tests were initiated to determine if any performance impacts as a result of long-term operation have occurred. Data evaluation continued in an effort to design a testing sequence to more precisely evaluate reburn impact on unburned carbon. These tests will be carried out during the second set of performance tests in early October. Performance and mathematical modeling are being carried out to understand the cause of the reduction in furnace exit gas temperature observed during reburn testing on Lamar coal and to predict whether the same phenomenon will occur on future units where reburn technology is being considered.

  2. Multiple anatomy optimization of accumulated dose

    SciTech Connect (OSTI)

    Watkins, W. Tyler, E-mail: watkinswt@virginia.edu; Siebers, Jeffrey V. [Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia 22908 and Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia 23298 (United States); Moore, Joseph A. [Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland 21231 and Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia 23298 (United States); Gordon, James [Henry Ford Health System, Detroit, Michigan 48202 and Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia 23298 (United States); Hugo, Geoffrey D. [Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia 23298 (United States)

    2014-11-01T23:59:59.000Z

    Purpose: To investigate the potential advantages of multiple anatomy optimization (MAO) for lung cancer radiation therapy compared to the internal target volume (ITV) approach. Methods: MAO aims to optimize a single fluence to be delivered under free-breathing conditions such that the accumulated dose meets the plan objectives, where accumulated dose is defined as the sum of deformably mapped doses computed on each phase of a single four dimensional computed tomography (4DCT) dataset. Phantom and patient simulation studies were carried out to investigate potential advantages of MAO compared to ITV planning. Through simulated delivery of the ITV- and MAO-plans, target dose variations were also investigated. Results: By optimizing the accumulated dose, MAO shows the potential to ensure dose to the moving target meets plan objectives while simultaneously reducing dose to organs at risk (OARs) compared with ITV planning. While consistently superior to the ITV approach, MAO resulted in equivalent OAR dosimetry at planning objective dose levels to within 2% volume in 14/30 plans and to within 3% volume in 19/30 plans for each lung V20, esophagus V25, and heart V30. Despite large variations in per-fraction respiratory phase weights in simulated deliveries at high dose rates (e.g., treating 4/10 phases during single fraction beams) the cumulative clinical target volume (CTV) dose after 30 fractions and per-fraction dose were constant independent of planning technique. In one case considered, however, per-phase CTV dose varied from 74% to 117% of prescription implying the level of ITV-dose heterogeneity may not be appropriate with conventional, free-breathing delivery. Conclusions: MAO incorporates 4DCT information in an optimized dose distribution and can achieve a superior plan in terms of accumulated dose to the moving target and OAR sparing compared to ITV-plans. An appropriate level of dose heterogeneity in MAO plans must be further investigated.

  3. FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2011

    E-Print Network [OSTI]

    Birner, Thomas

    (MHD) (5.0) 10 10 10 0 10 10 Accumulated Cyclone Energy (ACE) (96.1) 165 160 160 8 152 160 Net Tropical Cyclone Activity (NTC) (100%) 180 175 175 10 165 175 POST-31 JULY PROBABILITIES FOR AT LEAST ONE MAJOR

  4. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 15 SEPTEMBER 28, 2010

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the second year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  5. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 27 OCTOBER 10, 2013

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the fifth year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  6. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 16 AUGUST 29, 2013

    E-Print Network [OSTI]

    that we are trying to predict with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index This is the fifth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early for ACE using three categories as defined in Table 1. Table 1: ACE forecast definition. Parameter

  7. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 3 AUGUST 16, 2012

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the fourth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  8. Regional Typhoon Activity1 as Revealed by Track Patterns and

    E-Print Network [OSTI]

    Hawai'i at Manoa, University of

    , lifespan, inten- sity, and accumulated cyclone energy (ACE). Results indicate that the major cli- mate classify historical tropical cyclone (TC) tracks (1945-2007) over the western North Pacific into eight- rea. For ACE, the signal is mixed. To draw more definitive conclusions, a consis- tency check

  9. FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2014

    E-Print Network [OSTI]

    Major Hurricane Days (MHD) (3.9) 2 3 3 0 3 3 Accumulated Cyclone Energy (ACE) (92) 55 65 65 7 58 65 Net Tropical Cyclone Activity (NTC) (103%) 60 70 70 5 65 70 POST-31 JULY PROBABILITIES FOR AT LEAST ONE MAJOR

  10. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM OCTOBER 12 OCTOBER 25, 2012

    E-Print Network [OSTI]

    Gray, William

    to predict with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined This is the fourth year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting for individual event parameters such as named storms and hurricanes. We issue forecasts for ACE using three

  11. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 28 OCTOBER 11, 2012

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the fourth year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  12. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 13 SEPTEMBER 26, 2013

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the fifth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  13. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 18 AUGUST 31, 2010

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the second year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  14. FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2013

    E-Print Network [OSTI]

    Gray, William

    Hurricanes (MH) (2.0) 4 4 0 3 3 Major Hurricane Days (MHD) (3.9) 9 9 0 7 7 Accumulated Cyclone Energy (ACE) (92) 165 165 7 135 142 Net Tropical Cyclone Activity (NTC) (103%) 175 175 10 140 150 POST-31 JULY

  15. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM OCTOBER 11 OCTOBER 24, 2013

    E-Print Network [OSTI]

    Gray, William

    to predict with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined This is the fifth year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting for individual event parameters such as named storms and hurricanes. We issue forecasts for ACE using three

  16. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 28 OCTOBER 11, 2011

    E-Print Network [OSTI]

    Gray, William

    that we are trying to predict with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index of tropical cyclone (TC) activity starting in early August. We have decided to discontinue our individual for ACE using three categories as defined in Table 1. Table 1: ACE forecast definition. Parameter

  17. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 2 AUGUST 15, 2013

    E-Print Network [OSTI]

    Gray, William

    that we are trying to predict with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index This is the fifth year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting for ACE using three categories as defined in Table 1. Table 1: ACE forecast definition. Parameter

  18. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 31 SEPTEMBER 13, 2012

    E-Print Network [OSTI]

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the fourth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  19. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 14 SEPTEMBER 27, 2011

    E-Print Network [OSTI]

    that we are trying to predict with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index of tropical cyclone activity starting in early August. We have decided to discontinue our individual monthly for ACE using three categories as defined in Table 1. Table 1: ACE forecast definition. Parameter

  20. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 17 AUGUST 30, 2012

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the fourth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  1. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 4 AUGUST 17, 2010

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the second year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  2. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 29 OCTOBER 12, 2010

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the second year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  3. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 11 SEPTEMBER 24, 2014

    E-Print Network [OSTI]

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the sixth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  4. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 14 SEPTEMBER 27, 2012

    E-Print Network [OSTI]

    Gray, William

    that we are trying to predict with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index of tropical cyclone activity starting in early August. We have decided to discontinue our individual monthly for ACE using three categories as defined in Table 1. Table 1: ACE forecast definition. Parameter

  5. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 30 SEPTEMBER 12, 2013

    E-Print Network [OSTI]

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the fifth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  6. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 31 SEPTEMBER 13, 2011

    E-Print Network [OSTI]

    Birner, Thomas

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the third year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  7. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 28 SEPTEMBER 10, 2014

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the sixth year that we have issued shorter-term forecasts of tropical cyclone activity starting in early such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  8. COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM OCTOBER 13 OCTOBER 26, 2010

    E-Print Network [OSTI]

    Gray, William

    with these two-week forecasts is the Accumulated Cyclone Energy (ACE) index, which is defined to be all This is the second year that we have issued shorter-term forecasts of tropical cyclone (TC) activity starting such as named storms and hurricanes. We issue forecasts for ACE using three categories as defined in Table 1

  9. S162 july 2008| AcknowledgmentS. Over 300 individuals from

    E-Print Network [OSTI]

    Acquisition System AVHRR Advanced Very High Resolution Radiometer AVISO Archiving, Validating: Acronyms A Anticyclonic days ACC Antarctic Circumpolar Current ACE NOAA's Accumulated Cyclone Energy Index Multidecadal Mode AMO Atlantic Multidecadal Oscillation AMSR-E Advanced Microwave Scanning Radiometer for Earth

  10. The Relation Between Dry Vortex Merger and Tropical Cyclone Genesis over the Atlantic Ocean

    SciTech Connect (OSTI)

    Chen, Shu-Hua; Liu, Yi-Chin

    2014-10-27T23:59:59.000Z

    A strong, convective African tropical disturbance has a greater chance to develop into a Tropical 23 Depression (TD) if it merges with a shallow, dry vortex (D-vortex) from the north of the African 24 easterly jet (AEJ) after leaving the western coast. Using 11-year reanalysis data we found that the 25 western tip of a vortex strip at northwestern Africa can serve as dry vortices for the D-vortex 26 merger if it shifts southward. Another source of D-vortices is the westward propagating lows 27 along the southern edge of the Saharan air. The D-vortex merger process occurred for 63.5% of 28 tropical cyclones (TCs) or developing systems over the main development region of the Atlantic 29 Ocean, while it occurred for 54% of non-developing systems. TC genesis could be largely 30 controlled by the large-scale environment, but the differences in characteristics of vortices 31 associated with the D-vortex merger between developing and non-developing systems could 32 potentially help determine their destinies; in general, developing systems were dominated by a 33 more intense and moist south vortex, while non-developing systems were dominated by a north 34 vortex which was more intense, drier, and larger in size. Analysis also shows that 74% of intense 35 developing systems were involved with the D-vortex merger process. More attention needs to be 36 paid to the D-vortex merger and the characteristics of those vortices as they can play significant 37 roles or have a strong indication in Atlantic TC genesis.

  11. WORKING PAPER N 2009 -41 Migration and capital accumulation

    E-Print Network [OSTI]

    Boyer, Edmond

    , remittances, capital accumulation, rural poverty PARIS-JOURDAN SCIENCES ECONOMIQUES LABORATOIRE D. Key Words: Migration; Remittances; Capital Accumulation; Rural Poverty. Paris School of Economics (PSE) and Poverty Action Lab (J-PAL Europe), 48 Boulevard Jourdan, 75014 Paris, France. chiodi

  12. EXPERIMENTAL METHODS TO ESTIMATE ACCUMULATED SOLIDS IN NUCLEAR WASTE TANKS

    SciTech Connect (OSTI)

    Duignan, M.; Steeper, T.; Steimke, J.

    2012-12-10T23:59:59.000Z

    The Department of Energy has a large number of nuclear waste tanks. It is important to know if fissionable materials can concentrate when waste is transferred from staging tanks prior to feeding waste treatment plants. Specifically, there is a concern that large, dense particles, e.g., plutonium containing, could accumulate in poorly mixed regions of a blend tank heel for tanks that employ mixing jet pumps. At the request of the DOE Hanford Tank Operations Contractor, Washington River Protection Solutions, the Engineering Development Laboratory of the Savannah River National Laboratory performed a scouting study in a 1/22-scale model of a waste tank to investigate this concern and to develop measurement techniques that could be applied in a more extensive study at a larger scale. Simulated waste tank solids and supernatant were charged to the test tank and rotating liquid jets were used to remove most of the solids. Then the volume and shape of the residual solids and the spatial concentration profiles for the surrogate for plutonium were measured. This paper discusses the overall test results, which indicated heavy solids only accumulate during the first few transfer cycles, along with the techniques and equipment designed and employed in the test. Those techniques include: Magnetic particle separator to remove stainless steel solids, the plutonium surrogate from a flowing stream; Magnetic wand used to manually remove stainless steel solids from samples and the tank heel; Photographs were used to determine the volume and shape of the solids mounds by developing a composite of topographical areas; Laser rangefinders to determine the volume and shape of the solids mounds; Core sampler to determine the stainless steel solids distribution within the solids mounds; Computer driven positioner that placed the laser rangefinders and the core sampler over solids mounds that accumulated on the bottom of a scaled staging tank in locations where jet velocities were low. These devices and techniques were very effective to estimate the movement, location, and concentrations of the solids representing plutonium and are expected to perform well at a larger scale. The operation of the techniques and their measurement accuracies will be discussed as well as the overall results of the accumulated solids test.

  13. Test Plan - Solids Accumulation Scouting Studies

    SciTech Connect (OSTI)

    Duignan, M. R.; Steeper, T. J.; Steimke, J. L.; Fowley, M. D.

    2012-05-10T23:59:59.000Z

    This plan documents the highlights of the Solids Accumulations Scouting Studies test; a project, from Washington River Protection Solutions (WRPS), that began on February 1, 2012. During the last 12 weeks considerable progress has been made to design and plan methods that will be used to estimate the concentration and distribution of heavy fissile solids in accumulated solids in the Hanford double-shell tank (DST) 241-AW-105 (AW-105), which is the primary goal of this task. This DST will be one of the several waste feed delivery staging tanks designated to feed the Pretreatment Facility (PTF) of the Waste Treatment and Immobilization Plant (WTP). Note that over the length of the waste feed delivery mission AW-105 is currently identified as having the most fill empty cycles of any DST feed tanks, which is the reason for modeling this particular tank. At SRNL an existing test facility, the Mixing Demonstration Tank, which will be modified for the present work, will use stainless steel particles in a simulant that represents Hanford waste to perform mock staging tanks transfers that will allow solids to accumulate in the tank heel. The concentration and location of the mock fissile particles will be measured in these scoping studies to produce information that will be used to better plan larger scaled tests. Included in these studies is a secondary goal of developing measurement methods to accomplish the primary goal. These methods will be evaluated for use in the larger scale experiments. Included in this plan are the several pretest activities that will validate the measurement techniques that are currently in various phases of construction. Aspects of each technique, e.g., particle separations, volume determinations, topographical mapping, and core sampling, have been tested in bench-top trials, as discussed herein, but the actual equipment to be employed during the full test will need evaluation after fabrication and integration into the test facility.

  14. The development of a cyclonic combustor for high particulate, low caloric value gas produced by a fluidized bed

    E-Print Network [OSTI]

    Cardenas, Manuel Moises

    1985-01-01T23:59:59.000Z

    the combustion of a low caloric value (LCV) and high particulate gas. Performance tests were conducted to verify the cyclone combustor design flexibility by identifying satisfactory performance characteristics. The LCV gas was produced from the gasification... to Dr. Thomas R. Lalk for being my committee chairman and giving me this opportunity to work on this project and his guidance through my master's degree program. I would also like to thank Drs. W. A. LePori, J. A. Caton and J. C. Dutton for being...

  15. Abstract geometrical computation 7: Geometrical accumulations and computably

    E-Print Network [OSTI]

    Durand-Lose, Jérôme

    Abstract geometrical computation 7: Geometrical accumulations and computably enumerable real to accumulating drawings into a single point. Such points are characterized in the context of Abstract geometrical and space are con- tinuous and accumulations can happen. Constructions exist to un- boundedly accelerate

  16. Accelerating Pipelined Integer and Floating-Point Accumulations in Configurable

    E-Print Network [OSTI]

    Martonosi, Margaret

    Accelerating Pipelined Integer and Floating-Point Accumulations in Configurable Hardware addition until the end of a repeated calculation such as accumulation or dot- product; this effectively and floating- point designs that use our technique. Our pipelined integer multiply-accumulate (MAC) design

  17. On the Impossibility of Batch Update for Cryptographic Accumulators

    E-Print Network [OSTI]

    On the Impossibility of Batch Update for Cryptographic Accumulators Philippe Camacho Dept@dcc.uchile.cl December 15, 2009 Abstract A cryptographic accumulator is a scheme where a set of elements is represented into the set. In their survey on accumulators [FN02], Fazzio and Nicolisi noted that the Camenisch

  18. Sacrificing Reproductive Success for the Primitive Accumulation of Cattle

    E-Print Network [OSTI]

    White, Douglas R.

    Sacrificing Reproductive Success for the Primitive Accumulation of Cattle DURAN BELL and SHUNFENG accumulation processes of the Mukogodo, a low status group in northern Kenya. The Mukogodo appear the marrying out of daughters in order to accumulate cattle and parental neglect of sons, in order (we claim

  19. The Accumulated Experience Ant Colony for the Travelling Salesman Problem

    E-Print Network [OSTI]

    Montgomery, James

    The Accumulated Experience Ant Colony for the Travelling Salesman Problem Marcus Randall, James, as a consequence of this link, the rest of the path may be longer than if another link was chosen. The Accumulated city and the potential next city in conjunction with the distance. The accumulated experience ant

  20. Universal Accumulators with Efficient Nonmembership Jiangtao Li1

    E-Print Network [OSTI]

    Li, Ninghui

    Universal Accumulators with Efficient Nonmembership Proofs Jiangtao Li1 , Ninghui Li2 , and Rui Xue of Illinois at Urbana-Champaign rxue@uiuc.edu Abstract. Based on the notion of accumulators, we propose a new cryptographic scheme called universal accumulators. This scheme enables one to commit to a set of values using

  1. Supporting Non-membership Proofs with Bilinear-map Accumulators

    E-Print Network [OSTI]

    Supporting Non-membership Proofs with Bilinear-map Accumulators Ivan Damg°ard Nikos Triandopoulos an extension of Nguyen's bilinear-map based accumulator scheme [8] to support non-membership witnesses and corresponding non-membership proofs, i.e., cryptographic proofs that an element has not been accumulated

  2. Selective Degradation of Accumulated Secretory Proteins in the Endoplasmic Reticulum

    E-Print Network [OSTI]

    Mecham, Robert

    Selective Degradation of Accumulated Secretory Proteins in the Endoplasmic Reticulum A POSSIBLE was not se- creted, nor was there an intracellular accumulation of the protein. In contrast, fibronectin accumulated within the cells in the presence of BFA. Northern analysis of mRNA levels in FCL cells showed

  3. Data Clustering Using Evidence Accumulation Ana L.N. Fred

    E-Print Network [OSTI]

    Fred, Ana

    Data Clustering Using Evidence Accumulation Ana L.N. Fred Telecommunications Institute Instituto State University, USA jain@cse.msu.edu Abstract We explore the idea of evidence accumulation for com, ultimately imposing hyper-spherical clusters on the data. We explore the idea of evidence accumulation

  4. RESEARCH ARTICLE Open Access Mutation accumulation in Tetrahymena

    E-Print Network [OSTI]

    Gordo, Isabel

    RESEARCH ARTICLE Open Access Mutation accumulation in Tetrahymena Patrcia H Brito1* , Elsa are estimated in mutation accumulation experiments where replicate lines are propagated in conditions that allow mutations to randomly accumulate without the purging effect of natural selection. These experiments have

  5. On the Impossibility of Batch Update for Cryptographic Accumulators

    E-Print Network [OSTI]

    Hevia, Alejandro

    On the Impossibility of Batch Update for Cryptographic Accumulators Philippe Camacho and Alejandro. {pcamacho,ahevia}@dcc.uchile.cl Abstract. A cryptographic accumulator is a scheme where a set of elements membership into the set. If new values are added or existent values are deleted from the accumulator

  6. INTRODUCTION The accumulation of osmolytes, specifically `compatible' osmolytes,

    E-Print Network [OSTI]

    Hammock, Bruce D.

    4615 INTRODUCTION The accumulation of osmolytes, specifically `compatible' osmolytes, is a key and Ferraris, 2008). Various molecular pathways relating to osmolyte accumulation, including cotransporter activity and biosynthesis enzymes, have been shown to be induced in order to accumulate myo-inositol within

  7. Does imperfect competition foster capital accumulation in a developing economy ?

    E-Print Network [OSTI]

    Boyer, Edmond

    Does imperfect competition foster capital accumulation in a developing economy ? Pascal Belan competition and capital accumulation in a dual economy, with traditional and modern sectors and two types. Capitalists accumulate wealth in the modern sector. The economy is open to cap- ital flows, but capitalists

  8. Neurobiology of Disease Psychosine Accumulates in Membrane Microdomains in the

    E-Print Network [OSTI]

    Bongarzone, Ernesto R.

    Neurobiology of Disease Psychosine Accumulates in Membrane Microdomains in the Brain of Krabbe of GALC ( -galactosylceramidase) that leads to a progressive accumulation of some galactosyl-sphingolipids in the brain. We hypothesized that the accumulation of psychosine (galactosyl-sphingosine) in the TWI CNS may

  9. Neuromelanin biosynthesis is driven by excess cytosolic catecholamines not accumulated

    E-Print Network [OSTI]

    Sulzer, David

    Neuromelanin biosynthesis is driven by excess cytosolic catecholamines not accumulated by synaptic by increasing vesicular accumulation of neurotransmitter. The NM is in a stable complex with ferric iron, and NM synthesis thus results from excess cytosolic catecholamines not accumulated into synaptic vesicles

  10. The coordinates of isolated accumulations are exactly computable real numbers

    E-Print Network [OSTI]

    Durand-Lose, Jérôme

    The coordinates of isolated accumulations are exactly computable real numbers J´er^ome Durand and Smale. The key is that accumulations can be de- vised to accelerate the computation and provide an exact for coordinates and speeds, the collections of positions of accumulations in both space and time are exactly

  11. Gibberellins accumulate in the elongating endodermal cells of Arabidopsis root

    E-Print Network [OSTI]

    Tsien, Roger Y.

    Gibberellins accumulate in the elongating endodermal cells of Arabidopsis root Eilon Shania,1 , Roy. The labeled GAs specifically accumulated in the endo- dermal cells of the root elongation zone that GA accumulation is an active and highly regulated process. Our results strongly suggest the presence

  12. Self terminating, guided or accumulator models of visual search

    E-Print Network [OSTI]

    Oram, Mike

    1 Self terminating, guided or accumulator models of visual search: Evidence from stimulus inversion? Efficient search Blonde? #12;2 Accumulator models & visual search Information acquisition hypothesis E.g. Ratcliff 1978; McClelland 1979; Loftus 1983; Carpenter & Williams, 1995; Gold & Shadlen, 2001 Accumulator

  13. Compliance of Hazardous Waste Satellite Accumulation Areas (SAAs)

    E-Print Network [OSTI]

    Compliance of Hazardous Waste Satellite Accumulation Areas (SAAs) All Hazardous waste generated to be chemically hazardous and shall be kept in a Satellite Accumulation Area (SAA). The safety coordinator will keep a list of all SAA's in the division and must be notified before an accumulation area

  14. Greenland snow accumulation estimates from satellite radar scatterometer data

    E-Print Network [OSTI]

    Long, David G.

    Greenland snow accumulation estimates from satellite radar scatterometer data Mark R. Drinkwater accumulation on the Greenland ice sheet. Microwave radar backscatter images of Greenland are derived using (or decrease) in net snow accumulation on the polar ice caps. The net mass balance of the Greenland

  15. Soil microbe Bacillus subtilis (GB03) induces biomass accumulation and salt tolerance with lower sodium accumulation in wheat

    E-Print Network [OSTI]

    Par, Paul W.

    Soil microbe Bacillus subtilis (GB03) induces biomass accumulation and salt tolerance with lower sodium accumulation in wheat Jin-Lin ZhangA,B,E , Mina AzizB , Yan QiaoC , Qing-Qiang HanA , Jing Li to promote biomass accumulation and increase salt tolerance was investigated in wheat (Triticum aestivum

  16. Low No{sub x}/SO{sub x} burner retrofit for utility cyclone boilers. Baseline test report: Issue A

    SciTech Connect (OSTI)

    Moore, K.; Martin, L.; Smith, J.

    1991-05-01T23:59:59.000Z

    The Low NO{sub x}/SO{sub x} (LNS) Burner Retrofit for Utility Cyclone Boilers program consists of the retrofit and subsequent demonstration of the technology at Southern Illinois Power Cooperative`s (SIPC`s) 33-MW unit 1 cyclone boiler located near Marion, Illinois. The LNS Burner employs a simple innovative combustion process burning high-sulfur Illinois coal to provide substantial SO{sub 2} and NO{sub x} control within the burner. A complete series of boiler performance and characterization tests, called the baseline tests, was conducted in October 1990 on unit 1 of SIPC`s Marion Station. The primary objective of the baseline test was to collect data from the existing plant that could provide a comparison of performance after the LNS Burner retrofit. These data could confirm the LNS Burner`s SO{sub x} and NO{sub x} emissions control and any effect on boiler operation. Further, these tests would provide to the project experience with the operating characteristics of the host unit as well as engineering design information to minimize technical uncertainties in the application of the LNS Burner technology.

  17. Transient accumulation of elastic energy in proton translocating ATP synthase

    E-Print Network [OSTI]

    Steinhoff, Heinz-Jrgen

    on a central shaft, subunit Q, and linked by an eccentric stator [1^3]. The enzyme either synthesizes ATP is eventually extruded from its respec- tive binding site on FI. This process continues by advancing to the next

  18. The impact of an intense summer cyclone on 2012 Arctic sea ice retreat Jinlun Zhang, Ron Lindsay, Axel Schweiger, and Michael Steele

    E-Print Network [OSTI]

    Zhang, Jinlun

    Arctic ice volume had already declined ~40% from the 20072011 mean. The thin sea ice pack of the low-pressure system was well within the sea ice pack, with a minimum central pressure of 974.5 hThe impact of an intense summer cyclone on 2012 Arctic sea ice retreat Jinlun Zhang, Ron Lindsay

  19. The impact of tropical cyclones (TC) on global climate is still debated. They rapidly mix the water column beneath them, bringing cold water to the surface.

    E-Print Network [OSTI]

    Jones, Peter JS

    of Climate, 21, 638 Sriver & Huber, 2007, Observational evidence for an ocean heat pump induced by tropicalThe impact of tropical cyclones (TC) on global climate is still debated. They rapidly mix the water column beneath them, bringing cold water to the surface. One way to parameterise this process

  20. Possible Reasons Why Aluminum is a Beneficial Element for Melastoma malabathricum, an Aluminum Accumulator

    E-Print Network [OSTI]

    Watanabe, Toshihiro; Osaki, Mitsuru

    2009-01-01T23:59:59.000Z

    growth, especially in Al accumulators (Watanabe and Osaki,Melastomataceae) is an Al accumulator and dominant speciesL. (Myrtaceae, Al non-accumulator) are members of order

  1. Spatially tracking 13C labeled substrate (bicarbonate) accumulation...

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

    tracking 13C labeled substrate (bicarbonate) accumulation in microbial communities using laser ablation isotope ratio Spatially tracking 13C labeled substrate (bicarbonate)...

  2. Using Circular Programs to Deforest in Accumulating Parameters

    E-Print Network [OSTI]

    Eckmiller, Rolf

    Using Circular Programs to Deforest in Accumulating Parameters Janis Voigtl¨ander (voigt) deforestation, tree transducers CCS categories and subject descriptors: D.1.1 [Programming Techniques

  3. aps positron accumulator: Topics by E-print Network

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

    Emission and Accumulation of Antiprotons and Positrons from Supersymmetric Dark Matter HEP - Phenomenology (arXiv) Summary: We estimate the amount of antiprotons and...

  4. Co-combustion of refuse derived fuel and coal in a cyclone furnace at the Baltimore Gas and Electric Company, C. P. Crane Station

    SciTech Connect (OSTI)

    Not Available

    1982-03-01T23:59:59.000Z

    A co-combustion demonstration burn of coal and fluff refuse-derived fuel (RDF) was conducted by Teledyne National and Baltimore Gas and Electric Company. This utility has two B and W cyclone furnaces capable of generating 400 MW. The facility is under a prohibition order to convert from No. 6 oil to coal; as a result, it was desirable to demonstrate that RDF, which has a low sulfur content, can be burned in combination with coals containing up to 2% sulfur, thus reducing overall sulfur emissions without deleterious effects. Each furnace consists of four cyclones capable of generating 1,360,000 pounds per hour steam. The tertiary air inlet of one of the cyclones was modified with an adapter to permit fluff RDF to be pneumatically blown into the cyclone. At the same time, coal was fed into the cyclone furnace through the normal coal feeding duct, where it entered the burning chamber tangentially and mixed with the RDF during the burning process. Secondary shredded fluff RDF was prepared by the Baltimore County Resource Recovery Facility. The RDF was discharged into a receiving station consisting of a belt conveyor discharging into a lump breaker, which in turn, fed the RDF into a pneumatic line through an air-lock feeder. A total of 2316 tons were burned at an average rate of 5.6 tons per hour. The average heat replacement by RDF for the cyclone was 25%, based on Btu input for a period of forty days. The range of RDF burned was from 3 to 10 tons per hour, or 7 to 63% heat replacement. The average analysis of the RDF (39 samples) for moisture, ash, heat (HHV) and sulfur content were 18.9%, 13.4%, 6296 Btu/lb and 0.26% respectively. RDF used in the test was secondary shredded through 1-1/2 inch grates producing the particle size distribution of from 2 inches to .187 inches. Findings to date after inspection of the boiler and superheater indicate satisfactory results with no deleterious effects from the RDF.

  5. Self-Accumulation of Information in the Nature

    E-Print Network [OSTI]

    Keiichi Akama

    2014-08-24T23:59:59.000Z

    To understand why information accumulates despite the global entropy increase, we argue that existing composite entities, from atoms to galaxies, including lives, are information condensates, which accumulate information in a self-explanatory manner. In order to confirm and to illustrate this idea, we investigate the roles of information in survival of a hydrogen atom.

  6. RUPTURE BY DAMAGE ACCUMULATION IN ROCKS David Amitrano

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    RUPTURE BY DAMAGE ACCUMULATION IN ROCKS David Amitrano LIRIGM, Universit J. Fourier, Grenoble of rocks is associated with microcracks nucleation and propagation, i.e. damage. The accumulation of damage as strength and modulus. The damage process can be studied both statically by direct observation of thin

  7. ORIGINAL PAPER Accumulation of vitamin E in potato (Solanum tuberosum)

    E-Print Network [OSTI]

    Douches, David S.

    ORIGINAL PAPER Accumulation of vitamin E in potato (Solanum tuberosum) tubers Elizabeth F. Crowell of tocopherols can be accumulated in potato (Solanum tuberosum L.) tubers through metabolic engineering. Two transgenes were constitutively over-expressed in potato: Arabid- opsis thaliana p-hydroxyphenylpyruvate dioxy

  8. Dynamically accumulated dose and 4D accumulated dose for moving tumors

    SciTech Connect (OSTI)

    Li Heng; Li Yupeng; Zhang Xiaodong; Li Xiaoqiang; Liu Wei; Gillin, Michael T.; Zhu, X. Ronald [Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, Texas 77030 (United States)

    2012-12-15T23:59:59.000Z

    Purpose: The purpose of this work was to investigate the relationship between dynamically accumulated dose (dynamic dose) and 4D accumulated dose (4D dose) for irradiation of moving tumors, and to quantify the dose uncertainty induced by tumor motion. Methods: The authors established that regardless of treatment modality and delivery properties, the dynamic dose will converge to the 4D dose, instead of the 3D static dose, after multiple deliveries. The bounds of dynamic dose, or the maximum estimation error using 4D or static dose, were established for the 4D and static doses, respectively. Numerical simulations were performed (1) to prove the principle that for each phase, after multiple deliveries, the average number of deliveries for any given time converges to the total number of fractions (K) over the number of phases (N); (2) to investigate the dose difference between the 4D and dynamic doses as a function of the number of deliveries for deliveries of a 'pulsed beam'; and (3) to investigate the dose difference between 4D dose and dynamic doses as a function of delivery time for deliveries of a 'continuous beam.' A Poisson model was developed to estimate the mean dose error as a function of number of deliveries or delivered time for both pulsed beam and continuous beam. Results: The numerical simulations confirmed that the number of deliveries for each phase converges to K/N, assuming a random starting phase. Simulations for the pulsed beam and continuous beam also suggested that the dose error is a strong function of the number of deliveries and/or total deliver time and could be a function of the breathing cycle, depending on the mode of delivery. The Poisson model agrees well with the simulation. Conclusions: Dynamically accumulated dose will converge to the 4D accumulated dose after multiple deliveries, regardless of treatment modality. Bounds of the dynamic dose could be determined using quantities derived from 4D doses, and the mean dose difference between the dynamic dose and 4D dose as a function of number of deliveries and/or total deliver time was also established.

  9. Systems Level Regulation of Rhythmic Growth Rate and Biomass Accumulation in Grasses

    SciTech Connect (OSTI)

    Kay, Steve A. [University of California San Diego

    2013-05-02T23:59:59.000Z

    Several breakthroughs have been recently made in our understanding of plant growth and biomass accumulation. It was found that plant growth is rhythmically controlled throughout the day by the circadian clock through a complex interplay of light and phytohormone signaling pathways. While plants such as the C4 energy crop sorghum (Sorghum bicolor (L.) Moench) and possibly the C3 grass (Brachypodium distachyon) also exhibit daily rhythms in growth rate, the molecular details of its regulation remain to be explored. A better understanding of diurnally regulated growth behavior in grasses may lead to species-specific mechanisms highly relevant to future strategies to optimize energy crop biomass yield. Here we propose to devise a systems approach to identify, in parallel, regulatory hubs associated with rhythmic growth in C3 and C4 plants. We propose to use rhythmicity in daily growth patterns to drive the discovery of regulatory network modules controlling biomass accumulation.

  10. PBL FY2001 Audited Accumulated Net Revenues

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomass and BiofuelsOversightandCenterBusiness LineAugust

  11. Impaired lipid accumulation in the liver of Tsc2-heterozygous mice during liver regeneration

    SciTech Connect (OSTI)

    Obayashi, Yoko, E-mail: youko_oobayashi@ajinomoto.com [Department of Pathology, University of Washington School of Medicine, Seattle, WA (United States)] [Department of Pathology, University of Washington School of Medicine, Seattle, WA (United States); Campbell, Jean S.; Fausto, Nelson [Department of Pathology, University of Washington School of Medicine, Seattle, WA (United States)] [Department of Pathology, University of Washington School of Medicine, Seattle, WA (United States); Yeung, Raymond S. [Department of Surgery, University of Washington School of Medicine, Seattle, WA (United States)] [Department of Surgery, University of Washington School of Medicine, Seattle, WA (United States)

    2013-07-19T23:59:59.000Z

    Highlights: Tuberin phosphorylation correlated with mTOR activation in early liver regeneration. Liver regeneration in the Tsc2+/? mice was not enhanced. The Tsc2+/? livers failed to accumulate lipid bodies during liver regeneration. Mortality rate increased in Tsc2+/? mice after partial hepatectomy. Tuberin plays a critical role in hepatic lipid accumulation to support regeneration. -- Abstract: Tuberin is a negative regulator of mTOR pathway. To investigate the function of tuberin during liver regeneration, we performed 70% hepatectomy on wild-type and Tsc2+/? mice. We found the tuberin phosphorylation correlated with mTOR activation during early liver regeneration in wild-type mice. However, liver regeneration in the Tsc2+/? mice was not enhanced. Instead, the Tsc2+/? livers failed to accumulate lipid bodies, and this was accompanied by increased mortality. These findings suggest that tuberin plays a critical role in liver energy balance by regulating hepatocellular lipid accumulation during early liver regeneration. These effects may influence the role of mTORC1 on cell growth and proliferation.

  12. Magnetic Field Confinement in the Corona: The Role of Magnetic Helicity Accumulation

    E-Print Network [OSTI]

    Mei Zhang; Natasha Flyer; Boon Chye Low

    2006-03-01T23:59:59.000Z

    A loss of magnetic field confinement is believed to be the cause of coronal mass ejections (CMEs), a major form of solar activity in the corona. The mechanisms for magnetic energy storage are crucial in understanding how a field may possess enough free energy to overcome the Aly limit and open up. Previously, we have pointed out that the accumulation of magnetic helicity in the corona plays a significant role in storing magnetic energy. In this paper, we investigate another hydromagnetic consequence of magnetic-helicity accumulation. We propose a conjecture that there is an upper bound on the total magnetic helicity that a force-free field can contain. This is directly related to the hydromagnetic property that force-free fields in unbounded space have to be self-confining. Although a mathematical proof of this conjecture for any field configuration is formidable, its plausibility can be demonstrated with the properties of several families of power-law, axisymmetric force-free fields. We put forth mathematical evidence, as well as numerical, indicating that an upper bound on the magnetic helicity may exist for such fields. Thus, the accumulation of magnetic helicity in excess of this upper bound would initiate a non-equilibrium situation, resulting in a CME expulsion as a natural product of coronal evolution.

  13. Exploration of the meteorological characteristics leading to the rapid cessation of cloud-to-ground lightning in winter cyclones along the East Coast of the United States

    E-Print Network [OSTI]

    Demetriades, Nicholas William Snow

    1999-01-01T23:59:59.000Z

    Page DEDICATION. V ACKNOWLEDGEMENTS. Vl TABLE OF CONTENTS. Vl1 LIST OF FIGURES. . LIST OF TABLES. CHAPTER Xlv I HUTRODUCTION. II BACKGROUND. 1. Winter Thunderstorms. . 2. Cloud Electrification-Charging Mechanisms... for the northeast quadrant of all seven East Coast cyclones. 112 7 Same as Table 6, except for the NICG lightning sounding data. . 1 13 8 Same as Table 6, except for the southeast quadrant. . . 116 9 Same as Table 7, except for the southeast quadrant. . . . 10...

  14. Low NO{sub x}/SO{sub x} Burner retrofit for utility cyclone boilers. Quarterly technical progress report, October--December 1990

    SciTech Connect (OSTI)

    Not Available

    1990-12-31T23:59:59.000Z

    Cyclone furnaces operate with high excess air and at high temperature. The heat release during combustion is very high and as a result the boiler volume is much smaller than would be found in a conventional pc-fired system. The Marion Unit 1 boiler, at the level of the cyclone entry, has a small cross-section; about 5-feet in depth and about 20-feet in width. A boiler schematic showing the LNS Burner and relative location of the superheater region and overfire air ports is shown in Figure 1. The LNS Burner`s combustion process is fundamentally different from that of the cyclone, and the combustion products are also different. The LNS Burner products enter the boiler as hot, fuel-rich gases. Additional overfire air must be added to complete this combustion step with care taken to avoid the formation of thermal NO{sub x}. If done correctly, S0{sub 2} is controlled and significant NO{sub x} reductions are achieved. Because of the small boiler volume, flow modelling was found to be necessary to insure that adequate mixing of LNS Burner combustion products with air can be accomplished to achieve NO{sub x} emissions goals. Design requirements for the air injection system for the Marion boiler were developed using FLUENT, a commercially available computational fluid dynamics (CFD) code. A series of runs were made to obtain a design for final air injection that met the process design goals as closely as possible.

  15. The modeling of RF stacking of protons in the Accumulator

    SciTech Connect (OSTI)

    Yoon, Phil S.; /Fermilab /Rochester U.; McGinnis, David P.; Chou, Weiren; /Fermilab

    2005-06-01T23:59:59.000Z

    When the Run2 collider program is terminated in 2009, the present pbar source will be available for other usages. One possible application is to convert the Antiproton Accumulator to a proton accumulator so that the beam power from the Main Injector could be greatly enhanced [1]. The Accumulator has the unique feature of very large momentum acceptance. It is possible to stack 3-4 Booster batches in the longitudinal phase space before transferring them to the Main Injector or Recycler. This note shows the simulation of RF stacking using the code ESME [2].

  16. Accumulation of mercury in selected plant species grown in soils contaminated with different mercury compounds

    SciTech Connect (OSTI)

    Su, Yi; Han, Fengxiang; Shiyab, Safwan; Chen, Jian; Monts, David L. [Institute for Clean Energy Technology (ICET), Mississippi State University, 205 Research Blvd, Starkville, MS 39759 (United States)

    2007-07-01T23:59:59.000Z

    The objective of our research is to screen and search for suitable plant species for phyto-remediation of mercury-contaminated soil. Currently our effort is specifically focused on mercury removal from the U.S. Department of Energy (DOE) sites, where mercury contamination is a major concern. In order to cost effectively implement mercury remediation efforts, it is necessary now to obtain an improved understanding of biological means of removing mercury and mercury compounds.. Phyto-remediation is a technology that uses various plants to degrade, extract, contain, or immobilize contaminants from soil and water. In particular, phyto-extraction is the uptake of contaminants by plant roots and translocation within the plants to shoots or leaves. Contaminants are generally removed by harvesting the plants. We have investigated phyto-extraction of mercury from contaminated soil by using some of the known metal-accumulating plants since no natural plant species with mercury hyper-accumulating properties has yet been identified. Different natural plant species have been studied for mercury uptake, accumulation, toxicity and overall mercury removal efficiency. Various mercury compounds, such as HgS, HgCl{sub 2}, and Hg(NO{sub 3}){sub 2}, were used as contaminant sources. Different types of soil were examined and chosen for phyto-remediation experiments. We have applied microscopy and diffuse reflectance spectrometry as well as conventional analytical chemistry to monitor the phyto-remediation processes of mercury uptake, translocation and accumulation, and the physiological impact of mercury contaminants on selected plant species. Our results indicate that certain plant species, such as beard grass (Polypogon monospeliensis), accumulated a very limited amount of mercury in the shoots (<65 mg/kg), even though root mercury accumulation is significant (maximum 2298 mg/kg). Consequently, this plant species may not be suitable for mercury phyto-remediation. Other plant species, such as Indian mustard (Brassica juncea), a well-studied metal accumulator, exhibited severe chlorosis symptoms during some experiments. Among all the plant species studied, Chinese brake fern (Pteris vittata) accumulated significant amount of mercury in both roots and shoots and hence may be considered as a potential candidate for mercury phyto-extraction. During one experiment, Chinese brake ferns accumulated 540 mg/kg and 1469 mg/kg in shoots after 18 days of growing in soils treated with 500 parts-per-million (ppm) and 1000 ppm HgCl{sub 2} powder, respectively; no visual stress symptoms were observed. We also studied mercury phyto-remediation using aged soils that contained HgS, HgCl{sub 2}, or Hg(NO{sub 3}){sub 2}. We have found that up to hundreds of ppm mercury can be accumulated in the roots of Indian mustard plants grown with soil contaminated by mercury sulfide; HgS is assumed to be the most stable and also the predominant mercury form in flood plain soils. We have also started to investigate different mercury uptake mechanisms, such as root uptake of soil contaminant and foliar mercury accumulation from ambient air. We have observed mercury translocation from roots to shoot for Chinese fern and two Indian mustard varieties. (authors)

  17. Reexamining the Vertical Structure of Tangential Winds in Tropical Cyclones: Observations and Theory

    E-Print Network [OSTI]

    Nolan, David S.

    theory are governed by the dual constraints of thermal wind balance and slantwise moist neutrality- fluences their dynamics in several ways, notably by al- tering the efficiency with which unbalanced heat energy is converted to balanced mean kinetic energy (Hack and Schubert 1986; Nolan et al. 2007

  18. Time evolution of the intensity and size of tropical cyclones Kate D. Musgrave,1

    E-Print Network [OSTI]

    Schubert, Wayne H.

    evolution of the integrated kinetic energy K and the maximum tangential wind Vmax, which respectively kinetic energy inside radii of 100, 200, 500, and 1000 km. Note that, after the peak wind speed at 134 h 2012; accepted 9 May 2012; published 2 August 2012. [1] The purpose of this paper is to analyze

  19. Improving Ocean Model Initialization for Coupled Tropical Cyclone Forecast Models Using GODAE Nowcasts

    E-Print Network [OSTI]

    Shay, Lynn K. "Nick"

    in available thermal energy associated with energetic boundary currents and ocean eddies require their accurate temperature (SST) cooling. The potential for the ocean to support intensification depends on the thermal energy available to the storm, which in turn depends on both the temperature and thickness of the upper-ocean

  20. Period tripling accumulation point for complexified Henon map

    E-Print Network [OSTI]

    O. B. Isaeva; S. P. Kuznetsov

    2005-09-06T23:59:59.000Z

    Accumulation point of period-tripling bifurcations for complexified Henon map is found. Universal scaling properties of parameter space and Fourier spectrum intrinsic to this critical point is demonstrated.

  1. Proper Lagoon Management to Reduce Odor and Excessive Sludge Accumulation

    E-Print Network [OSTI]

    Mukhtar, Saqib

    1999-10-19T23:59:59.000Z

    Proper management techniques to reduce odor and excessive sludge accumulation include maintaining pH and salt levels, pumping regularly, maintaining adequate bacteria levels, and designing for efficiency. Definitions of key words are boxed for easy...

  2. Proper Lagoon Management to Reduce Odor and Excessive Sludge Accumulation

    E-Print Network [OSTI]

    Mukhtar, Saqib

    1999-10-19T23:59:59.000Z

    Proper management techniques to reduce odor and excessive sludge accumulation include maintaining pH and salt levels, pumping regularly, maintaining adequate bacteria levels, and designing for efficiency. Definitions of key words are boxed for easy...

  3. An investigation of damage accumulation in graphite/epoxy laminates

    E-Print Network [OSTI]

    Norvell, Robert Gerald

    1985-01-01T23:59:59.000Z

    AN INVESTIGATION OF DAMAGE ACCUMULATION IN GRAPHITE/EPOXY LAMINATES A Thesis by ROBERT GERALD NORVELL Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... August 1985 Major Subject: Aerospace Engineering AN INVESTIGATION OF DAMAGE ACCUMULATION IN GRAPHITE/EPOXY LAMINATES A Thesis by ROBERT GERALD NORVELL Approved as to style and content by: David H. Allen (Co-Chair of C mmitt. ) Richard A. Schap...

  4. The Effects of Roof Membrane Color on Moisture Accumulation in Low-slope Commercial Roof Systems

    SciTech Connect (OSTI)

    Kehrer, Manfred [ORNL

    2011-01-01T23:59:59.000Z

    The use of highly reflective roof membrane systems is being promoted and in some cases required in energy codes and green building codes and standards. Highly reflective membranes, which typically are light in color, have demonstrated reduced overall energy consumption in cooling dominated climate. These membranes also are theorized to reduce the heat island effect. Concern has been expressed about using highly reflective roof membrane systems in cool to cold climate zones because they potentially increase moisture accumulation in roof systems. Roof membranes are vapor retarders. The theory is that highly reflective membranes reflect the heat that could enter the roof assembly, potentially providing a condensing surface on the cold side of the roof assembly during winter months. The other concern is that roof systems using highly reflective membranes will not get hot enough during the summer months to dry out moisture that may have condensed or otherwise entered the roof assembly. This study focuses on mechanically attached, highly reflective, single-ply roof systems installed on low-slope (less than 2:12) structures in cool to cold climate zones. Three sources of data are considered when determining the moisture accumulation potential of these systems. 1.Test roof cuts taken during the winter months 2.Modeling data from a building envelope model specifically designed to evaluate moisture accumulation 3.Data from previous studies to determine the effects of roof membrane color on the drying rate of low-slope roof assemblies

  5. DYNAMICAL SENSITIVITY ANALYSIS OF TROPICAL CYCLONE STEERING AND GENESIS USING AN ADJOINT MODEL

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    the capability to grow through barotropic conversion of energy from a persistent low-level zonal jet sensitivity analysis. Physical interpretation of sensitivity gradients is complicated by several factors

  6. The 2009 North Atlantic Hurricane Season A Climate Perspective

    E-Print Network [OSTI]

    Atlantichur- ricanes began in 1995 (Goldenberg et al.2001).Asaresult,theAccumulated Cyclone Energy (ACE) index (Bell et Cyclone Energy (ACE) Index 2009 High-activity Era Averages 10 NS, 6.5H 3.3MH, ACE=131% Averages 8.5 NS, 5.shtml)calledfor9-14 named storms, 4-7 hurricanes, 1-3 major hurricanes, and anACE range of 65%-130% of the median

  7. Coal Reburning for Cyclone Boiler NO{sub x} Control Demonstration. Quarterly report No. 10, July--September 1992

    SciTech Connect (OSTI)

    Not Available

    1992-12-18T23:59:59.000Z

    The Coal Reburning for Cyclone Boiler NO{sub x}, Control Demonstration project progress for July, August, and September 1992 is identified in this tenth quarterly report and pertains to the on-going activities of Phase III Operation and Disposition. The project involves retrofitting/testing the reburning technology at Wisconsin Power & Light`s 100 MWe Nelson Dewey Unit {number_sign}2 in Cassville, Wisconsin to determine the commercial applicability of this technology to reduce NO{sub x} emission levels. Phase III activities emphasized continuation of long-term testing. WP&L is operating the reburn system in full automatic in a load following mode, using Lamar coal, which is an Indiana bituminous medium sulfur content fuel. Reductions in NO{sub x} emissions continue at the 50%+ level with no apparent significant adverse impacts to boiler operation. As of the end of September, a second set of performance tests were initiated to determine if any performance impacts as a result of long-term operation have occurred. Data evaluation continued in an effort to design a testing sequence to more precisely evaluate reburn impact on unburned carbon. These tests will be carried out during the second set of performance tests in early October. Performance and mathematical modeling are being carried out to understand the cause of the reduction in furnace exit gas temperature observed during reburn testing on Lamar coal and to predict whether the same phenomenon will occur on future units where reburn technology is being considered.

  8. Coal reburning for cyclone boiler NO{sub x} control demonstration. Quarterly report No. 8, January, February, and March 1992

    SciTech Connect (OSTI)

    Not Available

    1992-09-01T23:59:59.000Z

    Babcock & Wilcox engineering studies followed by pilot-scale testing has developed/confirmed the potential of utilizing gas, oil or coal reburning as a viable NO{sub x} reduction technology. To date, two US sponsored programs promote natural gas/oil as a reburning fuel because it was believed that gas/oil will provide significantly higher combustion efficiency than using coal at the reburn zone. Although B&W has shown that gas/oil reburning will play a role in reducing NO{sub x} emissions from cyclone boilers, B&W coal reburning research has also shown that coal as a reburning fuel performs nearly as well as gas/oil without deleterious effects on combustion efficiency. This means that boilers using reburning for NO, control can maintain 100% coal usage instead of switching to 20% gas/oil for reburning. As a result of the B&W performed coal reburning research, the technology has advanced to the point which it is now ready for demonstration on a commercial scale.

  9. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2010-01-01T23:59:59.000Z

    separator. Material falls down and is transferred to another cyclone,separators for raw mill High Efficiency roller mill for raw materials grinding Low pressure drop cyclones

  10. Assessing and Analyzing Near-Surface Radar Snow Accumulation Layers at Summit, Greenland

    E-Print Network [OSTI]

    Overly, Thomas Buckmaster

    2010-04-28T23:59:59.000Z

    depth are compared to physical properties, age-depth relationships, and accumulation rates from ice cores near Summit. Having established the radar horizons as annual accumulation markers, a 350-year record of accumulation rate is derived and analyzed...

  11. "A New Paradigm for Secondary Eyewall Formation in Tropical Cyclones",

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch >Internship ProgramBiomass andTriangleNameAND THE NEBRASKA

  12. Optimization of running strategies based on anaerobic energy and ...

    E-Print Network [OSTI]

    Amandine Aftalion

    2013-08-13T23:59:59.000Z

    Aug 13, 2013 ... We extend this analysis, based on the equation of motion and aerobic energy, to include a balance of anaerobic energy (or accumulated...

  13. Tropical cyclone genesis efficiency: mid-level versus bottom vortex Xuyang Ge and Tim Li

    E-Print Network [OSTI]

    Li, Tim

    . Email: timli@hawaii.edu #12;2 Abstract Cloud resolving Weather Research and Forecasting (WRF) model). Three low-level precursor types have been identified in the WNP. They are: TC energy dispersion induced genesis example. Typhoon Usagi formed in the South China Sea on 9 August 2001. Three days prior

  14. Warm ocean anomaly, air sea fluxes, and the rapid intensification of tropical cyclone Nargis (2008)

    E-Print Network [OSTI]

    Texas at Austin. University of

    's coasts great danger. As ocean is the energy source for intensification [Emanuel, 1999; Shay et al., 2000; Lin et al., 2005, 2008; Wu et al., 2007; I.-I. Lin et al., Upper ocean thermal structure to Monthly Weather Review, 2008], in this work we investigate the role of upper ocean thermal structure (UOTS

  15. Atomic-Level Computer Simulation of SiC: Defect Accumulation...

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

    Atomic-Level Computer Simulation of SiC: Defect Accumulation, Mechanical Properties and Defect Recovery. Atomic-Level Computer Simulation of SiC: Defect Accumulation, Mechanical...

  16. Mineral transformation and biomass accumulation associated with uranium bioremediation at Rifle, Colorado

    E-Print Network [OSTI]

    Li, L.

    2009-01-01T23:59:59.000Z

    iron(III) oxyhydroxides: effects of mineral solubility andMineral Transformation and Biomass Accumulation Associatedthe accumulation of new mineral phases and biomass. Word

  17. A major gene for leaf cadmium accumulation in maize (Zea mays L.)

    E-Print Network [OSTI]

    Soric, Roberta; Loncaric, Zdenko; Kovacevic, Vlado; Brkic, Ivan; Simic, Domagoj

    2009-01-01T23:59:59.000Z

    programs to select low Cd accumulators in maize. This can beselection for high Cd (hyper)accumulators in maize can be of

  18. PISCES FY11 Research Highlight Tritium accumulation within the ITER vessel is expected to be dominated

    E-Print Network [OSTI]

    PISCES FY11 Research Highlight Tritium accumulation within the ITER vessel is expected vessel. Another possible technique to mitigate tritium accumulation in these codeposited surfaces

  19. Coulomb stress accumulation along the San Andreas Fault system Bridget Smith and David Sandwell

    E-Print Network [OSTI]

    Smith-Konter, Bridget

    Coulomb stress accumulation along the San Andreas Fault system Bridget Smith and David Sandwell deformation, SCEC velocities, crustal stress Citation: Smith, B., and D. Sandwell, Coulomb stress accumulation

  20. Changes in optically stimulated luminescent dosimeter (OSLD) dosimetric characteristics with accumulated dose

    SciTech Connect (OSTI)

    Jursinic, Paul A. [West Michigan Cancer Center, 200 North Park St., Kalamazoo, Michigan 49007 (United States)

    2010-01-15T23:59:59.000Z

    Purpose: A new type of in vivo dosimeter, an optically stimulated luminescent dosimeter (OSLD), has now become commercially available for clinical use. The OSLD is a plastic disk infused with aluminum oxide doped with carbon (Al{sub 2}O{sub 3}:C). Crystals of Al{sub 2}O{sub 3}:C, when exposed to ionizing radiation, store energy that is released as luminescence (420 nm) when the OSLD is illuminated with stimulation light (540 nm). The intensity of the luminescence depends on the dose absorbed by the OSLD and the intensity of the stimulation light. The effects of accumulated dose on OSLD response were investigated. Methods: The OSLDs used in this work were nanodot dosimeters, which were read with a MicroStar reader (Landauer, Inc., Glenwood, IL). Dose to the OSLDs was delivered by 6 MV x rays and gamma rays from Co-60 and Ir-192. The signal on the OSLDs after irradiation is removed by optical annealing with a 150 W tungsten-halogen lamp or a 14 W compact fluorescent lamp was investigated. Results: It was found that OSLD response to dose was supralinear and this response was altered with the amount of accumulated dose to the OSLD. The OSLD response can be modeled by a quadratic and an exponential equation. For accumulated doses up to 60 Gy, the OSLD sensitivity (counts/dose) decreases and the extent of supralinear increases. Above 60 Gy of accumulated dose the sensitivity increases and the extent of supralinearity decreases or reaches a plateau, depending on how the OSLDs were optically annealed. With preirradiation of OSLDs with greater than 1 kGy, it is found that the sensitivity reaches a plateau 2.5 folds greater than that of an OSLD with no accumulated dose and the supralinearity disappears. A regeneration of the luminescence signal in the dark after full optical annealing occurs with a half time of about two days. The extent of this regeneration signal depends on the amount of accumulated dose. Conclusions: For in vivo dosimetric measurements, a precision of {+-}0.5% can be achieved if the sensitivity and extent of supralinearity is established for each OSLD and use. Methods are presented for accomplishing this task.

  1. Accumulation of entanglement in a continuous variable memory

    E-Print Network [OSTI]

    M. Paternostro; M. S. Kim; G. M. Palma

    2006-12-06T23:59:59.000Z

    We study the accumulation of entanglement in a memory device built out of two continuous variable (CV) systems. We address the case of a qubit mediating an indirect joint interaction between the CV systems. We show that, in striking contrast with respect to registers built out of bidimensional Hilbert spaces, entanglement superior to a single ebit can be efficiently accumulated in the memory, even though no entangled resource is used. We study the protocol in an immediately implementable setup, assessing the effects of the main imperfections.

  2. Cyclones Linked to Pliocene Warming: More Storms in Ancient Past May Have

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would likeConstitution4Customer-Comments Sign In About |CyberloImplications

  3. The deep water gas charged accumulator and its possible replacements

    E-Print Network [OSTI]

    Mir Rajabi, Mehdi

    2006-04-12T23:59:59.000Z

    . The problem may arise when the wellhead is at water depth of more than 3500 ft. In deep water drilling, the accumulators should be placed on the subsea blowout preventer stack to reduce hydraulic response times and provide a hydraulic power supply in case...

  4. Is Net Ecosystem Production Equal to Ecosystem Carbon Accumulation?

    E-Print Network [OSTI]

    Pace, Michael L.

    COMMENTARY Is Net Ecosystem Production Equal to Ecosystem Carbon Accumulation? Gary M. Lovett,* Jonathan J. Cole, and Michael L. Pace Institute of Ecosystem Studies, Millbrook, New York 12545, USA ABSTRACT Net ecosystem production (NEP), defined as the difference between gross primary production

  5. Holocene Carbon Accumulation of Fen Peatlands in Boreal Western

    E-Print Network [OSTI]

    Yu, Zicheng

    by tephra deposition. Peat accumulation rates vary by more than an or- der of magnitude and decline from 5500 to 1300 cal BP, resulting in a convex depth­age curve, which contrasts with the carbon is a function of the balance be- tween the primary production of living plants and the decomposition of all

  6. BWeb Notes for Chapter 4: Accumulating the Flows

    E-Print Network [OSTI]

    Ford, Andrew

    take the time to perform the accumulation carefully will can arrive at these answers with long delays in the adjustment of the stock variables. Further information on the implications "monthly counters" and "conveyor stocks" to simulate systems with "schooling behavior" in which major

  7. Using Circular Programs to Deforest in Accumulating Parameters

    E-Print Network [OSTI]

    Eckmiller, Rolf

    Using Circular Programs to Deforest in Accumulating Parameters Janis Voigtl ? ander # Department classical deforestation techniques fail. In order to avoid multiple traversals of the input data structure, deforestation, intermediate data structures, lazy composition, lazy evalu­ ation, multiple traversals, program

  8. Absorption cross-section 139 Accumulation mode, of aerosol 146

    E-Print Network [OSTI]

    Jacob, Daniel J.

    133, 151 residence times 153 size distributions 144 Air composition 2 molecular weight 4, 6 Albedo 122 dioxide Coagulation (aerosol) 146 Column model 32 Conditional unstability 56 Continuity equation 75261 INDEX A Absorption cross-section 139 Accumulation mode, of aerosol 146 Acetaldehyde (CH3CHO

  9. Bias adjustment of radar-based 3-hour precipitation accumulations

    E-Print Network [OSTI]

    Stoffelen, Ad

    projection of KNMI radar images 55 4 #12;Chapter 1 Introduction Since June 2003 a daily gauge is generated at 1400 UTC when the majority of the manual gauge observations have been reported. The radar-gaugeBias adjustment of radar-based 3-hour precipitation accumulations Iwan Holleman Technical Report

  10. Signal machines : localization of isolated accumulation Signal machines : localization of isolated

    E-Print Network [OSTI]

    Durand-Lose, Jérôme

    Signal machines : localization of isolated accumulation Signal machines : localization of isolated accumulation Jérôme Durand-Lose Laboratoire d'Informatique Fondamentale d'Orléans, Université d of isolated accumulation 1 Signal machines and isolated accumulations 2 Necessary conditions

  11. Autophagy induced by Alexander disease-mutant GFAP accumulation is regulated by p38/MAPK

    E-Print Network [OSTI]

    Sulzer, David

    Autophagy induced by Alexander disease-mutant GFAP accumulation is regulated by p38/MAPK and m protein accumulation as well as astrocyte function. In this study, we found that GFAP accumulation induces is negatively regulated by mammalian target of rapamycin (mTOR). The activation of p38 MAPK by GFAP accumulation

  12. Behavioural Processes 71 (2006) 2940 Effects of temporal clumping and payoff accumulation

    E-Print Network [OSTI]

    Stevens, Jeffrey

    2006-01-01T23:59:59.000Z

    Behavioural Processes 71 (2006) 2940 Effects of temporal clumping and payoff accumulation accumulation and temporal clumping on impulsiveness and cooperation. Payoff accumulation refers to a situation where the benefits gained from each choice trial accumulate from one trial to the next, and only become

  13. A numerical study of frictional entrainment in a cyclonic gulf stream ring

    E-Print Network [OSTI]

    Farrar, Paul Denton

    1977-01-01T23:59:59.000Z

    is in km r Bz Br and z in m. 1~8 Bs Scaled contours of ? ? ; r is in km r Br Bz and z in m. 8 E Scaled contours of C ~a , ' r is in km az and z in m. 35 36 37 38 15. Contours of kinetic energy density in joules/m r is in km and z in m. 43 Contours... further condition which is required by axisymmetry is that the meridional-plane velocities be non ? divergent, allowing representa- tion. by a streamf'unction (g). 10 2nr Bz (la) 2rr Br (lb) where u and w re the r and z velocity components, with z...

  14. Design of Wind Turbines in an Area with Tropical Cyclones Niels-Erik Clausen, niels-erik.clausen@risoe.dk, Sren Ott, Niels-Jacob Tarp-Johansen, Per Nrgrd and

    E-Print Network [OSTI]

    Design of Wind Turbines in an Area with Tropical Cyclones Niels-Erik Clausen, niels and cost of wind turbines is influenced by a combination of fatigue and extreme loads and the applied design codes. In general wind turbines are designed for 20 years of operation using design standards

  15. Directly observing entropy accumulate on the horizon and holography

    E-Print Network [OSTI]

    Ariel Edery; Hugues Beauchesne

    2012-05-15T23:59:59.000Z

    Recent numerical simulations of gravitational collapse show that there exists a special foliation of the spacetime where matter and entropy accumulate directly on the inside of the horizon surface. In this foliation, the time coincides with the proper time of the asymptotic static observer (ASO) and for spherical symmetry, this corresponds to isotropic coordinates. In this gauge, the three-volume in the interior shrinks to zero and only the horizon area remains at the end of collapse. In a different foliation, matter and entropy accumulate in the volume. The entropy is however independent of the foliation. Black hole holography is therefore a mapping from an arbitrary foliation, where information resides in the volume, to the special ASO frame, where it resides directly on the horizon surface.

  16. Surface accumulation of spermatozoa: a fluid dynamic phenomenon

    E-Print Network [OSTI]

    David J. Smith; John R. Blake

    2010-07-13T23:59:59.000Z

    Recent mathematical fluid dynamics models have shed light into an outstanding problem in reproductive biology: why do spermatozoa cells show a 'preference' for swimming near to surfaces? In this paper we review quantitative approaches to the problem, originating with the classic paper of Lord Rothschild in 1963. A recent 'boundary integral/slender body theory' mathematical model for the fluid dynamics is described, and we discuss how it gives insight into the mechanisms that may be responsible for the surface accumulation behaviour. We use the simulation model to explore these mechanisms in more detail, and discuss whether simplified models can capture the behaviour of sperm cells. The far-field decay of the fluid flow around the cell is calculated, and compared with a stresslet model. Finally we present some new findings showing how, despite having a relatively small hydrodynamic drag, the sperm cell 'head' has very significant effects on surface accumulation and trajectory.

  17. Accumulating Particles at the Boundaries of a Laminar Flow

    E-Print Network [OSTI]

    Michael Schindler; Peter Talkner; Marcin Kostur; Peter Hanggi

    2007-06-25T23:59:59.000Z

    The accumulation of small particles is analyzed in stationary flows through channels of variable width at small Reynolds number. The combined influence of pressure, viscous drag and thermal fluctuations is described by means of a Fokker-Planck equation for the particle density. It is shown that in the limit of vanishing particle size a uniform particle distribution is always approached in the long time limit. For extended spherical particles, conditions are specified that lead to inhomogeneous densities and consequently to particle accumulation and depletion. Hereby the boundary conditions for the particle density play a decisive role: The centers of spherical particles must keep the minimal distance of their radius from the fluid boundaries. The normal components of the forces acting on the sphere then may assume finite values which are diffusively transported into the bulk of the fluid.

  18. Probabilistic growth of large entangled states with low error accumulation

    E-Print Network [OSTI]

    Yuichiro Matsuzaki; Simon C Benjamin; Joseph Fitzsimons

    2009-08-03T23:59:59.000Z

    The creation of complex entangled states, resources that enable quantum computation, can be achieved via simple 'probabilistic' operations which are individually likely to fail. However, typical proposals exploiting this idea carry a severe overhead in terms of the accumulation of errors. Here we describe an method that can rapidly generate large entangled states with an error accumulation that depends only logarithmically on the failure probability. We find that the approach may be practical for success rates in the sub-10% range, while ultimately becoming unfeasible at lower rates. The assumptions that we make, including parallelism and high connectivity, are appropriate for real systems including measurement-induced entanglement. This result therefore shows the feasibility for real devices based on such an approach.

  19. A matrix damage accumulation model for laminated composites

    E-Print Network [OSTI]

    Lo, David Chi Shing

    1990-01-01T23:59:59.000Z

    . , Texas A8-M University Co-Chairs of Advisory Committee: Dr. D. H. Allen Dr. C. E. Harris A damage evolutionary relationship was developed to model the accuntulation of' intraply matrix cracks in laminated composites. This relationship was formulated... (Member) 'le=-~8 ~ W. E. Haisler (Head of Department) C. E. Harris & (Co-Clrair of Committee) / g. C. La, ' M. . Lu (Member) Itfay 1990 ABSTRACT A Matrix Damage Accumulation Model for Laminated Composites . (May 1990) David Chi Shing Lo, B, S...

  20. Renewable Energy in Alaska

    SciTech Connect (OSTI)

    Not Available

    2013-03-01T23:59:59.000Z

    This report examines the opportunities, challenges, and costs associated with renewable energy implementation in Alaska and provides strategies that position Alaska's accumulating knowledge in renewable energy development for export to the rapidly growing energy/electric markets of the developing world.

  1. Analysis of Hanle-effect signals observed in Si-channel spin accumulation devices

    SciTech Connect (OSTI)

    Takamura, Yota, E-mail: takamura@spin.pe.titech.ac.jp [Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503 (Japan); Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552 (Japan); Akushichi, Taiju; Sadano, Adiyudha; Okishio, Takao; Shuto, Yusuke; Sugahara, Satoshi, E-mail: sugahara@isl.titech.ac.jp [Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503 (Japan)

    2014-05-07T23:59:59.000Z

    We reexamined curve-fitting analysis for spin-accumulation signals observed in Si-channel spin-accumulation devices, employing widely-used Lorentz functions and a new formula developed from the spin diffusion equation. A Si-channel spin-accumulation device with a high quality ferromagnetic spin injector was fabricated, and its observed spin-accumulation signals were verified. Experimentally obtained Hanle-effect signals for spin accumulation were not able to be fitted by a single Lorentz function and were reproduced by the newly developed formula. Our developed formula can represent spin-accumulation signals and thus analyze Hanle-effect signals.

  2. Energy

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContractElectron-StateEnergy /newsroom/_assets/images/energy-icon.png Energy

  3. Distinct Cyclin D Genes Show Mitotic Accumulation or Constant Levels of Transcripts in Tobacco

    E-Print Network [OSTI]

    Murray, J.A.H.

    Distinct Cyclin D Genes Show Mitotic Accumulation or Constant Levels of Transcripts in Tobacco-type cyclins accumulate peri- odically during the S, G2, and early M phases (A types) or G2 and early M phases

  4. SPATIAL AND TEMPORAL VARIABILITY OF NET ACCUMULATION FROM SHALLOW CORES FROM

    E-Print Network [OSTI]

    Moore, John

    SPATIAL AND TEMPORAL VARIABILITY OF NET ACCUMULATION FROM SHALLOW CORES FROM VESTFONNA ICE CAP variability of net accumulation from shallow cores from Vestfonna ice cap (Nordaustlandet, Svalbard. We analyse ice cores from Vestfonna ice cap (Nordaustlandet, Svalbard). Oxygen isoto- pic

  5. The Use of Horizontal Wells in Gas Production from Hydrate Accumulations

    SciTech Connect (OSTI)

    Reagan, Matthew; Moridis, George J.; Reagan, Matthew T.; Zhang, Keni

    2008-04-15T23:59:59.000Z

    The amounts of hydrocarbon gases trapped in natural hydrate accumulations are enormous, leading to a recent interest in the evaluation of their potential as an energy source. Earlier studies have demonstrated that large volumes of gas can be readily produced at high rates for long times from gas hydrate accumulations by means of depressurization-induced dissociation, using conventional technology and vertical wells. The results of this numerical study indicate that the use of horizontal wells does not confer any practical advantages to gas production from Class 1 deposits. This is because of the large disparity in permeabilities between the hydrate layer (HL) and the underlying free gas zone, leading to a hydrate dissociation that proceeds in a horizontally dominant direction and is uniform along the length of the reservoir. When horizontal wells are placed near the base of the HL in Class 2 deposits, the delay in the evolution of a significant gas production rate outweighs their advantages, which include higher rates and the prevention of flow obstruction problems that often hamper the performance of vertical wells. Conversely, placement of a horizontal well near to top of the HL can lead to dramatic increases in gas production from Class 2 and Class 3 deposits over the corresponding production from vertical wells.

  6. Experimental Methods to Estimate Accumulated Solids in Nuclear Waste Tanks - 13313

    SciTech Connect (OSTI)

    Duignan, Mark R.; Steeper, Timothy J.; Steimke, John L. [Savannah River Nuclear Solutions, Savannah River National Laboratory, Aiken, SC 29808 (United States)] [Savannah River Nuclear Solutions, Savannah River National Laboratory, Aiken, SC 29808 (United States)

    2013-07-01T23:59:59.000Z

    The Department of Energy has a large number of nuclear waste tanks. It is important to know if fissionable materials can concentrate when waste is transferred from staging tanks prior to feeding waste treatment plants. Specifically, there is a concern that large, dense particles, e.g., plutonium containing, could accumulate in poorly mixed regions of a blend tank heel for tanks that employ mixing jet pumps. At the request of the DOE Hanford Tank Operations Contractor, Washington River Protection Solutions, the Engineering Development Laboratory of the Savannah River National Laboratory performed a scouting study in a 1/22-scale model of a waste tank to investigate this concern and to develop measurement techniques that could be applied in a more extensive study at a larger scale. Simulated waste tank solids and supernatant were charged to the test tank and rotating liquid jets were used to remove most of the solids. Then the volume and shape of the residual solids and the spatial concentration profiles for the surrogate for plutonium were measured. This paper discusses the overall test results, which indicated heavy solids only accumulate during the first few transfer cycles, along with the techniques and equipment designed and employed in the test. Those techniques include: - Magnetic particle separator to remove stainless steel solids, the plutonium surrogate from a flowing stream. - Magnetic wand used to manually remove stainless steel solids from samples and the tank heel. - Photographs were used to determine the volume and shape of the solids mounds by developing a composite of topographical areas. - Laser range finders to determine the volume and shape of the solids mounds. - Core sampler to determine the stainless steel solids distribution within the solids mounds. - Computer driven positioner that placed the laser range finders and the core sampler over solids mounds that accumulated on the bottom of a scaled staging tank in locations where jet velocities were low. These devices and techniques were very effective to estimate the movement, location, and concentrations of the solids representing plutonium and are expected to perform well at a larger scale. The operation of the techniques and their measurement accuracies will be discussed as well as the overall results of the accumulated solids test. (authors)

  7. Energy

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasRelease Date:researchEmerging ThreatsEmployment Openings

  8. A Vacuum Accumulation Solution to the Strong CP Problem

    E-Print Network [OSTI]

    Gia Dvali

    2005-10-06T23:59:59.000Z

    We suggest a solution to the strong CP problem in which there are no axions involved. The superselection rule of the \\theta-vacua is dynamically lifted in such a way that an infinite number of vacua are accumulated within the phenomenologically acceptable range of \\theta < 10^{-9}, whereas only a measure-zero set of vacua remains outside of this interval. The general prediction is the existence of membranes to which the standard model gauge fields are coupled. These branes may be light enough for being produced at the particle accelerators in form of the resonances with a characteristic membrane spectrum.

  9. Entanglement accumulation, retrieval, and concentration in cavity QED

    E-Print Network [OSTI]

    Daniel Ballester

    2009-06-02T23:59:59.000Z

    The ability to accumulate and retrieve entanglement in the fields of two remote cavities with pairs of two-level atoms is discussed. It is shown that this transfer and retrieval can be indeed ideal with a resonant interaction. The case of initial non-maximally entangled atomic pairs is also considered. This leads to the possibility of concentrating entanglement into a single pair at the retrieval stage. A teleportation protocol based on the same setup is presented. This makes possible teleportation with built-in entanglement concentration.

  10. An investigation of damage accumulation in graphite/epoxy laminates

    E-Print Network [OSTI]

    Norvell, Robert Gerald

    1985-01-01T23:59:59.000Z

    in Specimen A-4, [0/90?] , 98$ Ft s tu Crack Angle and Length Distribution in Specimen 8-5, [0/90, ] , 94$ s tu Crack Angle and Length Distribution in Specimen C-S, [0/90, ] , 91$ Ft . . ~ Crack Angle and Length Distribution in Specimen E-9, tO /90... August 1985 Major Subject: Aerospace Engineering AN INVESTIGATION OF DAMAGE ACCUMULATION IN GRAPHITE/EPOXY LAMINATES A Thesis by ROBERT GERALD NORVELL Approved as to style and content by: David H. Allen (Co-Chair of C mmitt. ) Richard A. Schap...

  11. Fast transverse instability in the NSNS Accumulator Ring

    SciTech Connect (OSTI)

    Ruggiero, A.G.; Blaskiewicz, M.

    1997-08-01T23:59:59.000Z

    This paper reports on the results of investigation of possible fast transverse instabilities in the NSNS Accumulator Ring. The instability may be caused by the presence of stripline devices like kicker magnets, the active damper system, and by the RF cavities, and the sharp steps of the vacuum pipe. The instability can be overcome by adopting aluminum as the material of the vacuum pipe.Still the growth time of the instability remains short especially for the mode in proximity of the betatron tune.

  12. Front-End Board with Cyclone V as a Test High-Resolution Platform for the Auger-Beyond-2015 Front End Electronics

    E-Print Network [OSTI]

    Zbigniew Szadkowski

    2014-06-07T23:59:59.000Z

    The surface detector (SD) array of the Pierre Auger Observatory containing at present 1680 water Cherenkov detectors spread over an area of 3000 km^2 started to operate since 2004. The currently used Front-End Boards are equipped with no-more produced ACEX and obsolete Cyclone FPGA (40 MSps/15-bit of dynamic range). Huge progress in electronics and new challenges from physics impose a significant upgrade of the SD electronics either to improve a quality of measurements (much higher sampling and much wider dynamic range) or pick-up from a background extremely rare events (new FPGA algorithms based on sophisticated approaches like e.g. spectral triggers or neural networks). Much higher SD sensitivity is necessary to confirm or reject hypotheses critical for a modern astrophysics. The paper presents the Front-End Board (FEB) with the biggest Cyclone V E FPGA 5CEFA9F31I7N, supporting 8 channels sampled with max. 250 MSps @ 14-bit resolution. Considered sampling for the SD is 120 MSps, however, the FEB has been developed with external anti-aliasing filters to keep a maximal flexibility. Six channels are targeted to the SD, two the rest for other experiments like: Auger Engineering Radio Array and additional muon counters. The FEB is an intermediate design pluged-in the actually used Unified Board communicating with micro-controller at 40 MHz, however providing even 250 MSPs sampling with 20-bit dynamic range, equipped in a virtual NIOS processor and supporting 256 MB of SDRAM as well as with an implemented spectral trigger based on the Discrete Cosine Transform for a detection of very inclined "old" showers. The FEB can also support a neural network developing for a detection of "young" showers, potentially generated by neutrinos.

  13. CIS 1068: Practice Problems 11 Some practice with basic loop algorithms: step-by-step loops, sentinel loops, accumulation

    E-Print Network [OSTI]

    Yates, Alexander

    , sentinel loops, accumulation loops, and nested loops. 1. Basic Step-by-Step Loops A basic step-by-step loop. Accumulation loops Accumulation loops keep track of and update information each time through the loop. Usually an accumulation loop. Accumulation loops are add-ons to either step-by-step or sentinel loops. You need to start

  14. Dimensionnement et gestion d'un systme de stockage thermique par hydro-accumulation : application la

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Dimensionnement et gestion d'un système de stockage thermique par hydro-accumulation : application de stockage thermique de type hydro-accumulation destiné à une chaufferie collective multi, mix-énergétique, stockage thermique, hydro-accumulation, dimensionnement optimal, gestion, graphe d

  15. Trying to make the connection: soil Ni speciation and plant accumulation. (S02-mcnearjr.415428-oral)

    E-Print Network [OSTI]

    Sparks, Donald L.

    Trying to make the connection: soil Ni speciation and plant accumulation. (S02-mcnearjr.415428-oral. To ascertain the effect of soil speciation on plant accumulation, a combination of micro-XRF, micro accumulation will help when making decisions as to how to remediate a site enriched with heavy metals. Speaker

  16. On Limits on the Computational Power of Data-Accumulating Stefan D. Bruda

    E-Print Network [OSTI]

    Bruda, Stefan D.

    On Limits on the Computational Power of Data-Accumulating Algorithms Stefan D. Bruda Department@cs.queensu.ca August 10, 2005 Abstract In the data-accumulating paradigm, inputs arrive continuously in real time not depend on the form of the arrival law. Keywords: computational complexity, data-accumulating algorithms

  17. TOWARDS IMPROVING NETWORK FLOW WATERMARKS USING THE REPEAT-ACCUMULATE CODES

    E-Print Network [OSTI]

    Borisov, Nikita

    TOWARDS IMPROVING NETWORK FLOW WATERMARKS USING THE REPEAT-ACCUMULATE CODES Amir Houmansadr the efficiency of network flow watermarks. In particular, we use the Repeat-Accumulate codes, a class of low simulation and discuss design tradeoffs. Index Terms-- Repeat-Accumulate codes, network flow watermarking

  18. Optical induction of plasticity at single synapses reveals input-specific accumulation of CaMKII

    E-Print Network [OSTI]

    Oertner, Thomas

    Optical induction of plasticity at single synapses reveals input-specific accumulation of Ca spines on the same dendrite, providing evidence that CaMKII accumulation at postsynaptic sites induces CaMKII accumulation in spines (810) have created much interest because CaMKII activation is both

  19. Accumulation-based Congestion Control Yong Xia, David Harrison, Shivkumar Kalyanaraman,

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    1 Accumulation-based Congestion Control Yong Xia, David Harrison, Shivkumar Kalyanaraman, Kishore mechanism and uses accumulation, buffered packets of a flow inside the network routers, as a conges- tion accumulation- based congestion control (ACC), which fits into the nonlin- ear optimization framework proposed

  20. Dynamic Universal Accumulators for DDH Groups and Their Application to Attribute-Based Anonymous

    E-Print Network [OSTI]

    Dynamic Universal Accumulators for DDH Groups and Their Application to Attribute-Based Anonymous Report TR2009-643 April 19, 2009 Abstract We present the first dynamic universal accumulator that allows -- or has not -- been accumulated, where g generates G, to efficiently prove her knowledge of such x in zero

  1. Neural mechanisms of saccade target selection: gated accumulator model of the visualmotor cascade

    E-Print Network [OSTI]

    Schall, Jeffrey D.

    Neural mechanisms of saccade target selection: gated accumulator model of the visualmotor cascade, Vanderbilt University, PMB 407817, 2301 Vanderbilt Place, Nashville, TN 37240-7817, USA Keywords: accumulator neurons in the frontal eye field as evidence for stimulus salience that is accumulated in a network

  2. Behavioral/Systems/Cognitive Evidence Accumulation and the Moment of Recognition

    E-Print Network [OSTI]

    Wagner, Anthony

    Behavioral/Systems/Cognitive Evidence Accumulation and the Moment of Recognition: Dissociating as the culmination of an integrative process in which evidence supporting different response options accumulates with TR suggested that these regions participated in the accumulation of evidence supporting object

  3. Rutgers-Camden Researchers Identify a Key Protein for Yield and Biomass Accumulation in Plants.

    E-Print Network [OSTI]

    Liu, Alice Y.C.

    Rutgers-Camden Researchers Identify a Key Protein for Yield and Biomass Accumulation in Plants. Growth, cell patterning, yield, and biomass accumulation in plants are controlled by multi and biomass accumulation. A particular protein, GIGANTUS1 (GTS1), named for its role in regulating a GIANT

  4. Do Damaged Proteins Accumulate in Caenorhabditis elegans L-Isoaspartate Methyltransferase (pcm-1)

    E-Print Network [OSTI]

    Clarke, Steven

    Do Damaged Proteins Accumulate in Caenorhabditis elegans L-Isoaspartate Methyltransferase (pcm-1 for helping to limit the accumulation of damaged proteins in aging or- ganisms. In this study, the effect Caenorhabditis elegans. It was found that damaged proteins recognized by this enzyme accumulated to significant

  5. Simple I/O-efficient flow accumulation on grid terrains Herman Haverkort

    E-Print Network [OSTI]

    Haverkort, Herman

    Simple I/O-efficient flow accumulation on grid terrains Herman Haverkort TU Eindhoven Jeffrey #12;Drainage network analysis 1 2­5 6­12 13­50 flooding flow routing flow accumulation compute network analysis flow routingwatershed labelling flow accumulation #12;Analysing I/O-efficiency main

  6. Strong Accumulators from Collision-Resistant Hashing Philippe Camacho Alejandro Hevia Marcos Kiwi Roberto Opazo

    E-Print Network [OSTI]

    Hevia, Alejandro

    Strong Accumulators from Collision-Resistant Hashing Philippe Camacho Alejandro Hevia Marcos Kiwi§ Roberto Opazo¶ September 3, 2012 Abstract Accumulator schemes were introduced in order to repre- sent- bership proofs, i.e. short witnesses that a certain value belongs to the set. In universal accumulator

  7. ACM SIGGRAPH 2002, San Antonio, TX Modeling the Accumulation of Wind-Driven Snow

    E-Print Network [OSTI]

    O'Brien, James F.

    ACM SIGGRAPH 2002, San Antonio, TX Modeling the Accumulation of Wind-Driven Snow Technical Sketch of snow drifts formed by the accumulation of wind-blown snow near buildings and other obstacles. Our method combines previous work on snow accumulation [Fearing] with techniques for incompressible fluid

  8. A Floating-point Accumulator for FPGA-based High Performance Computing Applications

    E-Print Network [OSTI]

    Zambreno, Joseph A.

    A Floating-point Accumulator for FPGA-based High Performance Computing Applications Song Sun Joseph,zambreno}@iastate.edu Abstract--A floating-point accumulator for FPGA-based high performance computing applications is proposed and evaluated. Compared to previous work, our accumulator uses a fixed size circuit, and can reduce an arbitrary

  9. Efficient parallel algorithms for tree accumulations Jeremy Gibbons, Wentong Cai and David B. Skillicorn

    E-Print Network [OSTI]

    Gibbons, Jeremy

    Efficient parallel algorithms for tree accumulations Jeremy Gibbons, Wentong Cai and David B. Skillicorn Abstract. Accumulations are higher­order operations on structured objects; they leave the shape of an object unchanged, but replace elements of that object with accumulated information about other elements

  10. Measurement of Liquid Water Accumulation in a PEMFC with Dead-Ended Anode

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    Measurement of Liquid Water Accumulation in a PEMFC with Dead-Ended Anode Jason B. Siegel,a, *,z, Maryland 20899, USA The operation and accumulation of liquid water within the cell structure of a polymer, accumulation of liquid water in the anode gas distribution channels was observed in most tested conditions

  11. Slow Cortical Dynamics and the Accumulation of Information over Long Timescales

    E-Print Network [OSTI]

    Hasson, Uri

    Neuron Article Slow Cortical Dynamics and the Accumulation of Information over Long Timescales to identify brain regions that accumulate information over short and long timescales and to characterize movie, indicating that these regions accumulate information over relatively long time periods (several

  12. Association of postfire peat accumulation and microtopography in boreal bogs1

    E-Print Network [OSTI]

    Benscoter, Brian W.

    Association of postfire peat accumulation and microtopography in boreal bogs1 Brian W. Benscoter, Dale H. Vitt, and R. Kelman Wieder Abstract: Peatlands accumulate organic matter as peat because of disproportionate rates of production and decomposi- tion. However, peat accumulation heterogeneity has not been

  13. AXIAL-FIELD SYNCHRONOUS MACHINE WITH HOMOPOLAR FLUX IN THE AIRGAP FOR A FLYWHEEL ACCUMULATOR

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    AXIAL-FIELD SYNCHRONOUS MACHINE WITH HOMOPOLAR FLUX IN THE AIRGAP FOR A FLYWHEEL ACCUMULATOR@bretagne.ens-cachan.fr Abstract: A new axial-field synchronous machine designed for a flywheel accumulator is presented herein with experimental results. Keywords: flywheel accumulator, axial-field synchronous machine, double-face printed

  14. Carpathian Journal of Earth and Environmental Sciences, September 2011, Vol. 6, No. 2, p. 85 -100 ACCUMULATION OF HEAVY METALS IN NATIVE PLANTS GROWING

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    and Technologies of Energy, Technopark of Borj Cdria University of Carthage - 2050 Hammam-Lif, Tunisia; Hassen ACCUMULATION OF HEAVY METALS IN NATIVE PLANTS GROWING NEAR THE PHOSPHATE TREATMENT INDUSTRY, TUNISIA Ins for phytostabilization of contaminated sites with Cd (BCF=23.51). Our study showed that native plant species growing

  15. Ultracold neutron accumulation in a superfluid-helium converter with magnetic multipole reflector

    E-Print Network [OSTI]

    O. Zimmer; R. Golub

    2015-03-04T23:59:59.000Z

    We analyze accumulation of ultracold neutrons (UCN) in a superfluid-helium converter vessel surrounded by a magnetic multipole reflector. We solved the spin-dependent rate equation, employing formulas valid for adiabatic spin transport of trapped UCN in mechanical equilibrium. Results for saturation UCN densities are obtained in dependence of order and strength of the multipolar field. The addition of magnetic storage to neutron optical potentials can increase the density and energy of the low field seeking UCN produced and serves to mitigate the effects of wall losses on the source performance. It also can provide a highly polarized sample of UCN without need to polarize the neutron beam incident on the converter. This work was performed in preparation of the UCN source project SuperSUN at the ILL.

  16. Recent Results on Lead-Ion Accumulation in LEAR for the LHC

    E-Print Network [OSTI]

    Baird, S A; Broere, J; Carli, Christian; Chanel, M; Hill, C; Ley, R; Lombardi, A M; MacCaferri, R; Maury, S; Mhl, D; Molinari, G; Mulder, H; Tanke, E; Tranquille, G; Varenne, F; Vretenar, Maurizio; Meshkov, I N; Syresin, E M

    1997-01-01T23:59:59.000Z

    To prepare dense bunches of lead ions for the LHC it has been proposed to accumulate the 4.2 MeV/u linac beam in a storage ring with electron cooling. A series of experiments is being performed in the low-energy ring LEAR to test this technique. First results were already reported at the Beam Crystallisation Workshop in Erice in November 1995. Two more recent runs to complement these investigations were concerned with: further study of the beam lifetime; the dependence of the cooling time on optical settings of the storage ring and on neutralization of the electron beam; tests in view of multiturn injection. New results obtained in these two runs in December 1995 and in April 1996 will be discussed in this contribution.

  17. Quantum-mechanical calculation of carrier distribution in MOS accumulation and strong inversion layers

    SciTech Connect (OSTI)

    Lee, Chien-Wei; Hwu, Jenn-Gwo [Graduate Institute of Electronics Engineering/ Department of Electrical Engineering, National Taiwan University, Taipei, 10617, Taiwan (China)] [Graduate Institute of Electronics Engineering/ Department of Electrical Engineering, National Taiwan University, Taipei, 10617, Taiwan (China)

    2013-10-15T23:59:59.000Z

    We derive a statistical physics model of two-dimensional electron gas (2DEG) and propose an accurate approximation method for calculating the quantum-mechanical effects of metal-oxide-semiconductor (MOS) structure in accumulation and strong inversion regions. We use an exponential surface potential approximation in solving the quantization energy levels and derive the function of density of states in 2D to 3D transition region by applying uncertainty principle and Schrdinger equation in k-space. The simulation results show that our approximation method and theory of density of states solve the two major problems of previous researches: the non-negligible error caused by the linear potential approximation and the inconsistency of density of states and carrier distribution in 2D to 3D transition region.

  18. Energy Spectrum of Quasi-Geostrophic Turbulence Peter Constantin

    E-Print Network [OSTI]

    Constantin, Peter

    that are smaller than a wave number associated to the forcing injection scale. This upper bound separates of the ow in quasi-two dimensional strata. Cyclonic and anti-cyclonic vortical motion ensues in these layers

  19. Energy Spectrum of Quasi-Geostrophic Turbulence Peter Constantin

    E-Print Network [OSTI]

    Constantin, Peter

    that are smaller than a wave number associated to the forcing injection scale.5This upper bound separates of the flow in quasi-two dimensional strata. Cyclonic and anti-cyclonic vortical motion ensues

  20. Energy Spectrum of Quasi-Geostrophic Turbulence Peter Constantin

    E-Print Network [OSTI]

    Constantin, Peter

    that are smaller than a wave number associated to the forcing injection scale. This upper bound separates of the flow in quasi-two dimensional strata. Cyclonic and anti-cyclonic vortical motion ensues in these layers

  1. Energy

    Office of Legacy Management (LM)

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling CorpNew 1325.8.Enaineer;/:4,4 (; ...) "..

  2. Zinc distribution and speciation in Arabidopsis halleri x Arabidops is lyrata progenies presenting various zinc accumulation capacities

    E-Print Network [OSTI]

    Sarret, Geraldine

    2010-01-01T23:59:59.000Z

    tigated in the leaves of an accumulator progeny (F2-8)and four non accumulator ones (F 1-1 , F 2-3 , F 2-4 and Fthe veins in the stronger accumulators are attributed to a

  3. The 2002 North Atlantic Hurricane Season Gerald D. Bell1

    E-Print Network [OSTI]

    . 2000). One measure of this seasonal activity is the Accumulated Cyclone Energy (ACE) index (Fig. 1), which is essentially a wind energy index calculated by summing the squares of the estimated 6-hourly storm or hurricane. For the 2002 season the total ACE index was 62.5 x 105 kt2 (Fig. 1), or 73

  4. Hydraulic accumulator-compressor for geopressured enhanced oil recovery

    DOE Patents [OSTI]

    Goldsberry, Fred L. (Spring, TX)

    1988-01-01T23:59:59.000Z

    A hydraulic accumulator-compressor vessel using geothermal brine under pressure as a piston to compress waste (CO.sub.2 rich) gas is used in a system having a plurality of gas separators in tandem to recover pipeline quality gas from geothermal brine. A first high pressure separator feeds gas to a membrance separator which separates low pressure waste gas from high pressure quality gas. A second separator produces low pressure waste gas. Waste gas from both separators is combined and fed into the vessel through a port at the top as the vessel is drained for another compression cycle. High pressure brine is then admitted into the vessel through a port at the bottom of the vessel. Check valves control the flow of low pressure waste gas into the vessel and high pressure waste gas out of the vessel.

  5. Ion accumulation in an electron plasma confined on magnetic surfaces

    SciTech Connect (OSTI)

    Berkery, John W.; Marksteiner, Quinn R.; Pedersen, Thomas Sunn; Kremer, Jason P. [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)

    2007-08-15T23:59:59.000Z

    Accumulation of ions can alter and may destabilize the equilibrium of an electron plasma confined on magnetic surfaces. An analysis of ion sources and ion content in the Columbia Non-neutral Torus (CNT) [T.S. Pedersen, J.P. Kremer, R.G. Lefrancois, Q. Marksteiner, N. Pomphrey, W. Reiersen, F. Dahlgreen, and X. Sarasola, Fusion Sci. Technol. 50, 372 (2006)] is presented. In CNT ions are created preferentially at locations of high electron temperature, near the outer magnetic surfaces. A volumetric integral of n{sub e}{nu}{sub iz} gives an ion creation rate of 2.8x10{sup 11} ions/s. This rate of accumulation would cause neutralization of a plasma with 10{sup 11} electrons in about half a second. This is not observed experimentally, however, because currently in CNT ions are lost through recombination on insulated rods. From a steady-state balance between the calculated ion creation and loss rates, the equilibrium ion density in a 2x10{sup -8} Torr neutral pressure, 7.5x10{sup 11} m{sup -3} electron density plasma in CNT is calculated to be n{sub i}=6.2x10{sup 9} m{sup -3}, or 0.8%. The ion density is experimentally measured through the measurement of the ion saturation current on a large area probe to be about 6.0x10{sup 9} m{sup -3} for these plasmas, which is in good agreement with the predicted value.

  6. The demonstration of an advanced cyclone coal combustor, with internal sulfur, nitrogen, and ash control for the conversion of a 23 MMBTU/hour oil fired boiler to pulverized coal

    SciTech Connect (OSTI)

    Zauderer, B.; Fleming, E.S.

    1991-08-30T23:59:59.000Z

    This work contains to the final report of the demonstration of an advanced cyclone coal combustor. Titles include: Chronological Description of the Clean Coal Project Tests,'' Statistical Analysis of Operating Data for the Coal Tech Combustor,'' Photographic History of the Project,'' Results of Slag Analysis by PA DER Module 1 Procedure,'' Properties of the Coals Limestone Used in the Test Effort,'' Results of the Solid Waste Sampling Performed on the Coal Tech Combustor by an Independent Contractor During the February 1990 Tests.'' (VC)

  7. Selenium Accumulation, Distribution, and Speciation in Spineless Prickly Pear Cactus: A Drought- and Salt-Tolerant, Selenium-Enriched Nutraceutical Fruit Crop for Biofortified Foods

    E-Print Network [OSTI]

    Banuelos, Gary S.

    2012-01-01T23:59:59.000Z

    plants, in secondary accumulator plants, and in traceto that of secondary Se-accumulator plant species. Hence,found in second- ary accumulator Brassicaceae species grown

  8. ENERGY

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

    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 DataDepartment of Energy Your Density Isn't Your Destiny:RevisedAdvisory Board Contributions EMEM RecoveryManagement'sJuneAprilEMS U.S.

  9. Energy

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEAWater UseCElizabethTwoJaniceEnerG2Energetics of Hydrogen .M

  10. Influence of upper-ocean stratification on tropical cyclone-induced surface cooling in the Bay of Bengal

    E-Print Network [OSTI]

    in oceanic stratification rather than to differences in TC wind energy input. During the postmonsoon season, a deeper thermal stratification combined with a considerable upper-ocean freshening strongly inhibits that TCs primarily draw their energy from evaporation at the ocean surface [Riehl, 1950]. TCs generally

  11. The effect of reservoir heterogeneity on gas production from hydrate accumulations in the permafrost

    SciTech Connect (OSTI)

    Reagan, M. T.; Kowalsky, M B.; Moridis, G. J.; Silpngarmlert, S.

    2010-05-01T23:59:59.000Z

    The quantity of hydrocarbon gases trapped in natural hydrate accumulations is enormous, leading to significant interest in the evaluation of their potential as an energy source. Large volumes of gas can be readily produced at high rates for long times from methane hydrate accumulations in the permafrost by means of depressurization-induced dissociation combined with conventional technologies and horizontal or vertical well configurations. Initial studies on the possibility of natural gas production from permafrost hydrates assumed homogeneity in intrinsic reservoir properties and in the initial condition of the hydrate-bearing layers (either due to the coarseness of the model or due to simplifications in the definition of the system). These results showed great promise for gas recovery from Class 1, 2, and 3 systems in the permafrost. This work examines the consequences of inevitable heterogeneity in intrinsic properties, such as in the porosity of the hydrate-bearing formation, or heterogeneity in the initial state of hydrate saturation. Heterogeneous configurations are generated through multiple methods: (1) through defining heterogeneous layers via existing well-log data, (2) through randomized initialization of reservoir properties and initial conditions, and (3) through the use of geostatistical methods to create heterogeneous fields that extrapolate from the limited data available from cores and well-log data. These extrapolations use available information and established geophysical methods to capture a range of deposit properties and hydrate configurations. The results show that some forms of heterogeneity, such as horizontal stratification, can assist in production of hydrate-derived gas. However, more heterogeneous structures can lead to complex physical behavior within the deposit and near the wellbore that may obstruct the flow of fluids to the well, necessitating revised production strategies. The need for fine discretization is crucial in all cases to capture dynamic behavior during production.

  12. Constant communication complexity protocols for multiparty accumulative boolean functions

    E-Print Network [OSTI]

    Sudebkumar Prasant Pal; Sima Das; Somesh Kumar

    2006-06-13T23:59:59.000Z

    Generalizing a boolean function from Cleve and Buhrman \\cite{cb:sqec}, we consider the class of {\\it accumulative boolean functions} of the form $f_B(X_1,X_2,..., X_m)=\\bigoplus_{i=1}^n t_B(x_i^1x_i^2... x_i^m)$, where $X_j=(x^j_1,x^j_2,..., x^j_n), 1\\leq j\\leq m$ and $t_B(x_i^1x_i^2... x_i^m)=1$ for input $m$-tuples $x_i^1x_i^2...x_i^m\\in B\\subseteq A\\subseteq \\{0,1\\}^n$, and 0, if $x_i^1x_i^2...x_i^m\\in A\\setminus B$. Here the set $A$ is the input {\\it promise} set for function $f_B$. The input vectors $X_j, 1\\leq j\\leq m$ are given to the $m\\geq 3$ parties respectively, who communicate cbits in a distributed environment so that one of them (say Alice) comes up with the value of the function. We algebraically characterize entanglement assisted LOCC protocols requiring only $m-1$ cbits of communication for such multipartite boolean functions $f_B$, for certain sets $B\\subseteq \\{0,1\\}^n$, for $m\\geq 3$ parties under appropriate uniform parity promise restrictions on input $m$-tuples $x_i^1x_i^2...x_i^m, 1\\leq i\\leq n$. We also show that these functions can be computed using $2m-3$ cbits in a purely classical deterministic setup. In contrast, for certain $m$-party accumulative boolean functions ($m\\geq 2$), we characterize promise sets of mixed parity for input $m$-tuples so that $m-1$ cbits of communication suffice in computing the functions in the absence of any a priori quantum entanglement. We compactly represent all these protocols and the corresponding input promise restrictions using uniform group theoretic and hamming distance characterizations.

  13. accumulate high concentrations: Topics by E-print Network

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

    high pressure chemical vapor deposition have been studied by high-resolution electron energy loss spectroscopy HREELS and room temperature infrared reflection measurements. HREEL...

  14. Strategies for gas production from oceanic Class 3 hydrate accumulations

    E-Print Network [OSTI]

    Moridis, George J.; Reagan, Matthew T.

    2007-01-01T23:59:59.000Z

    coexistence of aqueous, gas and hydrate phases, indicatingIntrinsic Rate of Methane Gas Hydrate Decomposition, Chem.Makogon, Y.F. , Gas hydrates: frozen energy, Recherche

  15. Bitumen accumulation in Grosmont platform complex, Upper Devonian, Alberta, Canada

    SciTech Connect (OSTI)

    Hoffmann, C.F.; Strausz, O.P.

    1986-09-01T23:59:59.000Z

    The Upper Devonian Grosmont Formation, a broad carbonate platform complex in Alberta, Canada, contains an estimated 300 billion bbl of bitumen. It has been suggested that these vast reserves are related to Lower Cretaceous Athabasca oil sands. Detailed gas chromatographic-mass spectrometric studies of a wide range of biologic marker compounds confirm this suggestion. The Grosmont Formation contains bitumen of similar maturity and source to the Athabasca deposit, but it has been subjected to a greater degree of biodegradation and water washing, possibly as a result of its reservoir rock characteristics. The difference in the degree of biodegradation is manifested by the absence of bicyclic terpanes and by the reduced concentrations of the C/sub 30/ and the 22R epimers of the extended hopanes in the Grosmont bitumen. Also, the greater degree of water washing of the Grosmont bitumen is inferred from the observed distribution of the bicyclic, tricyclic, and tetracyclic terpenoid sulfides, which shows a characteristic loss of the lower molecular weight members in the carbonate bitumen. The correlation established here between the two deposits suggests that if the precursor oil has indeed undergone long-distance migration, the Paleozoic carbonates could have acted as a path for migration. Finally, the observed distribution of steranes in the Grosmont bitumen corresponds to the suggestion that the Mannville Group shales were not the major source rocks of the oil-sand and carbonate bitumen accumulations of northern Alberta. 11 figures, 6 tables.

  16. ERS 14.1 Satellite Accumulation Ares (RCRA Compliance), 4/30/13

    Broader source: Energy.gov [DOE]

    The objective of this surveillance is to evaluate the effectiveness of the contractor's management of hazardous and mixed wastes in satellite accumulation areas. The Facility Representative...

  17. Accumulation and Recovery of Disorder in Au2+-Irradiated Cd2Nb2O7...

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

    of the disorder has been observed below room temperature. Citation: Jiang W, WJ Weber, and LA Boatner.2005."Accumulation and Recovery of Disorder in Au2+-Irradiated...

  18. urricane activity in the Atlantic basin increased

    E-Print Network [OSTI]

    with levels in the 1970s and 1980s. For example, the accumulated cyclone energy (ACE) index in the Atlantic of disturbances. Bottom: annual number (AugOct) of North Atlantic basin hurricanes (19802005). See figures 2, is a crucial question for the future outlook of hurricane activity in the basin. It is difficult to distinguish

  19. Atlantic Oceanographic and Meteorological LaboratoryMay-June 2010 Volume 14, Number 3 AOML is an environmental research laboratory of NOAA's Office of Oceanic and Atmospheric

    E-Print Network [OSTI]

    indicator that 2010 will be an active year is NOAA's accumulated cycle energy (ACE) index, which measures factors that favor tropical cyclone activity. This probability is one of the highest ever issued by NOAA total seasonal activity based on the strength and duration of named storms and hurricanes. The ACE range

  20. S175august 2009statE OFtHE CLIMatE IN 2008 | Acknowledgments. We would like to acknowl-

    E-Print Network [OSTI]

    and Reflection Radiometer ATLAS Autonomous Temperature Line Acquisition System AVHRR Advanced Very High AAO Atlantic Oscillation ACC Antarctic Circumpolar Current ACE NOAA's Accumulated Cyclone Energy Index Oscillation AMSR-E Advanced Microwave Scanning Radiometer for Earth Observing System AMSU Advanced Microwave

  1. Microfluidic System for Facilitated Quantification of Nanoparticle Accumulation to Cells Under Laminar Flow

    E-Print Network [OSTI]

    Simon, Scott I.

    Microfluidic System for Facilitated Quantification of Nanoparticle Accumulation to Cells Under to endothelial receptors has led to the rapid devel- opment of targeted nanoparticles for drug, gene and imaging nanoparticle accumulation under phys- iologically-relevant laminar flow. We designed reversibly vacuum

  2. Large Spin Accumulation in a Permalloy-Silver Lateral Spin Valve T. Kimura and Y. Otani

    E-Print Network [OSTI]

    Otani, Yoshichika

    Large Spin Accumulation in a Permalloy-Silver Lateral Spin Valve T. Kimura and Y. Otani Institute accumulation due to the electrical spin injection has been observed in Permalloy-silver lateral spin-valve structures. The observed resistance change is the largest among the reported metallic lateral spin valves

  3. Origins and accumulation of organic matter in expanded Albian to Santonian black shale sequences on the

    E-Print Network [OSTI]

    Gilli, Adrian

    Origins and accumulation of organic matter in expanded Albian to Santonian black shale sequences laminated, Cenoma- nianSantonian black shale sequences contain between 2% and 15% organic carbon about the depositional conditions leading to the black shale accumulations. The low d13 Corg values

  4. Net accumulation of the Greenland ice sheet: High resolution modeling of climate changes

    E-Print Network [OSTI]

    Born, Andreas

    : Kiilsholm, S., J. H. Christensen, K. Dethloff, and A. Rinke, Net accumulation of the Greenland ice sheetNet accumulation of the Greenland ice sheet: High resolution modeling of climate changes Sissi, Denmark Klaus Dethloff and Annette Rinke Alfred Wegener Institute for Polar and Marine Research

  5. ORIGINAL PAPER Linking multiple-level tree traits with biomass accumulation

    E-Print Network [OSTI]

    Bermingham, Eldredge

    ORIGINAL PAPER Linking multiple-level tree traits with biomass accumulation in native tree species, at the individual scale, links between biomass accumulation and multiple-level tree traits: biomass parti- tioning and Mohren 1995; Kraenzel et al. 2003). However, in some cases, poor adaptation of exotic species to climate

  6. agronomie: agriculture and environment Dry matter accumulation and seed yield in faba bean

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    agronomie: agriculture and environment Dry matter accumulation and seed yield in faba bean ( Vicia; Fifteen genotypes of spring faba bean, differing in flowering earliness, in growth habit (one determinate = faba bean / genetic variability / dry matter accumulation / yield / yield components / early indicator

  7. Evidence from threedimensional seismic tomography for a substantial accumulation of gas hydrate in a fluidescape

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Evidence from threedimensional seismic tomography for a substantial accumulation of gas hydrate to be associated with the emplacement of hydrate, accompanying the invasion of the gas hydrate stability zone accumulation of gas hydrate in a fluidescape chimney in the Nyegga pockmark field, offshore Norway, J. Geophys

  8. ALARA Review of the Spallation Neutron Source Accumulator Ring and Transfer Lines

    SciTech Connect (OSTI)

    Haire, M.J.

    2003-06-30T23:59:59.000Z

    The Spallation Neutron Source (SNS) is designed to meet the growing need for new tools that will deepen our understanding in materials science, life science, chemistry, fundamental and nuclear physics, earth and environmental sciences, and engineering sciences. The SNS is an accelerator-based neutron-scattering facility that when operational will produce an average beam power of 2 MW at a repetition rate of 60 Hz. The accelerator complex consists of the front-end systems, which will include an ion source; a 1-GeV full-energy linear accelerator; a single accumulator ring and its transfer lines; and a liquid mercury target. This report documents an as-low-as-reasonably-achievable (ALARA) review of the accumulator ring and transfer lines at their early design stage. An ALARA working group was formed and conducted a review of the SNS ring and transfer lines at the {approx}25% complete design stage to help ensure that ALARA principles are being incorporated into the design. The radiological aspects of the SNS design criteria were reviewed against regulatory requirements and ALARA principles. Proposed features and measures were then reviewed against the SNS design criteria. As part of the overall review, the working group reviewed the design manual; design drawings and process and instrumentation diagrams; the environment, safety, and health manual; and other related reports and literature. The group also talked with SNS design engineers to obtain explanations of pertinent subject matter. The ALARA group found that ALARA principles are indeed being incorporated into the early design stage. Radiation fields have been characterized, and shielding calculations have been performed. Radiological issues are being adequately addressed with regard to equipment selection, access control, confinement structure and ventilation, and contamination control. Radiation monitoring instrumentation for worker and environment protection are also being considered--a good practice at this early design stage. The ring and transfer lines are being designed for hands-on maintenance. The SNS beam loss criteria, which determine radiation dose design, are a factor of {approx}30 lower than the lowest that has been achieved at any existing proton synchrotron and accumulator rings. This demonstrates that ALARA considerations are an important part of SNS design. A noteworthy example of the ALARA principal being incorporated into the SNS is the hybrid ring lattice design recently approved by the SNS change control process. The new lattice design increases calculated acceptance by about 50% and improves the expected collimator efficiency from 80 to 95%. As a result, the expected calculated beam loss rate, and resulting radiation dose rates, are significantly improved. Another major design change with ALARA implications was the change from an alpha to an omega configuration for the high-energy beam transport (HEBT) system, ring, and ring-to-target beam transport (RTBT) system. Because of this change, the ring and transfer lines will have crane coverage, eliminating the need for personnel to be near activated equipment for repair and removal. By using the crane, extensive shielding can be placed around highly radioactive equipment (e.g., collimators), and the equipment can be moved by remote control. As part of the change from an alpha to omega configuration, the tunnel width was increased by 2 ft. This increased width will allow easier access to failed equipment, reducing radiation exposure time to workers during maintenance and repair. In addition, a personnel entrance was added to the ring between the HEBT and RTBT so that personnel will not have to enter this area directly through the HEBT or RTBT. This addition will shorten the travel distance, and therefore the time, that personnel performing maintenance work on radioactive equipment will need to be in the area, reducing potential dose. In the RTBT beam line, a hatchway will be placed above the collimators and quad doublet magnets near the target to facilitate their removal. This design was chosen in lieu

  9. airborne arctic stratospheric: Topics by E-print Network

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

    the Arctic System Reanalysis Natalia Tilinina1 , Sergey, Vienna MOTIVATION Key role of cyclone activity in the Arctic energy and hydrological cycles Cyclones impact on sea ice...

  10. arctic cloudy boundary: Topics by E-print Network

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

    the Arctic System Reanalysis Natalia Tilinina1 , Sergey, Vienna MOTIVATION Key role of cyclone activity in the Arctic energy and hydrological cycles Cyclones impact on sea ice...

  11. arctic ground squirrel: Topics by E-print Network

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

    the Arctic System Reanalysis Natalia Tilinina1 , Sergey, Vienna MOTIVATION Key role of cyclone activity in the Arctic energy and hydrological cycles Cyclones impact on sea ice...

  12. alesund arctic base: Topics by E-print Network

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

    the Arctic System Reanalysis Natalia Tilinina1 , Sergey, Vienna MOTIVATION Key role of cyclone activity in the Arctic energy and hydrological cycles Cyclones impact on sea ice...

  13. arctic stratospheric expedition: Topics by E-print Network

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

    the Arctic System Reanalysis Natalia Tilinina1 , Sergey, Vienna MOTIVATION Key role of cyclone activity in the Arctic energy and hydrological cycles Cyclones impact on sea ice...

  14. arctic ground squirrels: Topics by E-print Network

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

    the Arctic System Reanalysis Natalia Tilinina1 , Sergey, Vienna MOTIVATION Key role of cyclone activity in the Arctic energy and hydrological cycles Cyclones impact on sea ice...

  15. ORNL/TM-2008/141 Unlimited Damage Accumulation in

    E-Print Network [OSTI]

    Pennycook, Steve

    , are generally available free via the U.S. Department of Energy (DOE) Information Bridge. Web site http source. National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone 703) representatives, and International Nuclear Information System (INIS) representatives from the following source

  16. Solar power-propulsion plant using heat accumulators of solar energy

    SciTech Connect (OSTI)

    Popov, E.B.; Salnikov, V.A.; Fedik, I.I. [Scientific Production Association ``Lutch``, Podolsk, Moscow Region (Russia)

    1996-03-01T23:59:59.000Z

    This work covers the concept of a power-propulsion plant (PPP) for spacecraft. The PPP is intended: (a) to transport a spacecraft from one orbit to another to perform the spacecraft tasks; (b) to provide the spacecraft with electric power. {copyright} {ital 1996 American Institute of Physics.}

  17. Crystal-Tolerant Glass Approach For Mitigation Of Crystal Accumulation In Continuous Melters Processing Radioactive Waste

    SciTech Connect (OSTI)

    Kruger, Albert A. [Department of Energy, Office of River Protection, Richland, Washington (United States); Rodriguez, Carmen P. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Lang, Jesse B. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Huckleberry, Adam R. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Matyas, Josef [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Owen, Antoinette T. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

    2012-08-28T23:59:59.000Z

    High-level radioactive waste melters are projected to operate in an inefficient manner as they are subjected to artificial constraints, such as minimum liquidus temperature (T{sub L}) or maximum equilibrium fraction of crystallinity at a given temperature. These constraints substantially limit waste loading, but were imposed to prevent clogging of the melter with spinel crystals [(Fe, Ni, Mn, Zn)(Fe, Cr){sub 2}O{sub 4}]. In the melter, the glass discharge riser is the most likely location for crystal accumulation during idling because of low glass temperatures, stagnant melts, and small diameter. To address this problem, a series of lab-scale crucible tests were performed with specially formulated glasses to simulate accumulation of spinel in the riser. Thicknesses of accumulated layers were incorporated into empirical model of spinel settling. In addition, T{sub L} of glasses was measured and impact of particle agglomeration on accumulation rate was evaluated. Empirical model predicted well the accumulation of single crystals and/or smallscale agglomerates, but, excessive agglomeration observed in high-Ni-Fe glass resulted in an under-prediction of accumulated layers, which gradually worsen over time as an increased number of agglomerates formed. Accumulation rate of ~14.9 +- 1 nm/s determined for this glass will result in ~26 mm thick layer in 20 days of melter idling.

  18. Vanishing viscosity and the accumulation of vorticity on the boundary

    E-Print Network [OSTI]

    James P. Kelliher

    2008-05-15T23:59:59.000Z

    We say that the vanishing viscosity limit holds in the classical sense if the velocity for a solution to the Navier-Stokes equations converges in the energy norm uniformly in time to the velocity for a solution to the Euler equations. We prove, for a bounded domain in dimension 2 or higher, that the vanishing viscosity limit holds in the classical sense if and only if a vortex sheet forms on the boundary.

  19. Localizing Organomercury Uptake and Accumulation in Zebrafish Larvae at the

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let usNucleartearing modeTissue and Cellular

  20. FY 2002 Generation Audited Accumulated Net Revenues, February 10, 2003

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist. Category UC-lFederalFY 2008 FOIA - Request1 02/10/03 February

  1. Development of Artificial Ash Accelerated Accumulation Test | Department of

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

    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 DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197E T A * S H I ETechnology |Department

  2. Increased Lipid Accumulation and Carbohydrate Synthesis in Strains of

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn Other News Community Connections:HAZARD ANALYSES OF

  3. www.rsc.org/loc Volume 9 | 2009 | High Speed Nanofluidic Protein Accumulator

    E-Print Network [OSTI]

    Steckl, Andrew J.

    with 10 nm polycarbonate nanopore membranes were utilized as high-speed protein accumulators. Double is electrically driven and operates based on differences in buffer concentration, conductance or p

  4. ACCUMULATION OF RADIOCESIUM BY MUSHROOMS IN THE ENVIRONMENT: A LITERATURE REVIEW

    SciTech Connect (OSTI)

    Duff, M

    2007-05-28T23:59:59.000Z

    During the last 50 years, a large amount of information on radionuclide accumulators or ''sentinel-type'' organisms in the environment has been published. Much of this work focused on the risks of food-chain transfer of radionuclides to higher organisms such as reindeer and man. However, until the 1980's and 1990's, there has been little published data on the radiocesium ({sup 134}Cs and {sup 137}Cs) accumulation by mushrooms. This presentation will consist of a review of the published data for {sup 134,137}Cs accumulation by mushrooms in nature. This review will discuss the aspects that promote {sup 134,137}Cs uptake by mushrooms and focus on mushrooms that demonstrate a large propensity for use in the environmental biomonitoring of radiocesium contamination. It will also provide descriptions of habitats for many of these mushrooms and discuss on how growth media and other conditions relate to Cs accumulation.

  5. Non-linear Damage Accumulation in Au-irradiated SrTiO3. | EMSL

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

    leads to non-linear increase of the width of the damage profile. Citation: Zhang Y, WJ Weber, V Shutthanandan, and S Thevuthasan.2006."Non-linear Damage Accumulation in...

  6. Synoptic Scale Weather Patterns Associated with Annual Snow Accumulation Variability in North-Central Greenland

    E-Print Network [OSTI]

    CHEN, SHU

    2013-08-31T23:59:59.000Z

    Abstract Previous studies on the synoptic forcing of high elevation areas of central Greenland have mostly relied on ice cores, snow pits, mesoscale models, and climate models. In this study, a radar-measured 118-year annual snow accumulation record...

  7. Dark Matter Accumulation near the Earth for the Long Range Forces case

    E-Print Network [OSTI]

    M. S. Onegin; A. P. Serebrov; O. M. Zherebtsov

    2011-09-15T23:59:59.000Z

    The accumulation of dark matter near the Earth is considered. We analyze the case of long range interaction forces. Additional density of the dark matter at the Earth's surface is calculated. We show that this density exceeds the mean density of the dark matter in our galaxy by more then $10^5$ times for some values of dark matter particle mass. Accumulation of WIMP's near the Earth by the same mechanism is also analyzed.

  8. Platelet accumulation on artificial surfaces in vivo: effect of intravascular hemolysis

    E-Print Network [OSTI]

    McCord, Fiona Gardiner

    1986-01-01T23:59:59.000Z

    PLATELET ACCUMULATION ON ARTIFICIAL SURFACES IN VIVO: EFFECl' OF INTRAVASCULAR HEMOLYSIS A 'Ihesis by FIONA GARDINER MCCORD Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 1986 Major Subject: Veterinary Physiology PLATELET ACCUMULATION ON ARTIFICIAL SURFACES IN VIVO: EFFECT OF INTRAVASCULAR HEMOLYSIS A Thesis by FIONA GARDINER MCCORD Approved as to style and content by: David R. Gross...

  9. From salience to saccades: Multiple-alternative gated stochastic accumulator model of visual Braden A. Purcell1,2,3

    E-Print Network [OSTI]

    Palmeri, Thomas

    1 From salience to saccades: Multiple-alternative gated stochastic accumulator model of visual: (615) 343-7900 fax: (615) 343-8449 We describe a stochastic accumulator model demonstrating that visual competing accumulators. The model quantitatively accounts for behavior and predicts neural dynamics

  10. An Accumulation-based Congestion Control Model Yong Xia, David Harrison, Shivkumar Kalyanaraman, Kishore Ramachandran, Arvind Venkatesan

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    An Accumulation-based Congestion Control Model Yong Xia, David Harrison, Shivkumar Kalyanaraman and proposes a model to use accumulation, buffered packets of a flow inside network routers, as a congestion measure on which a family of congestion control schemes can be derived. We call this model accumulation

  11. Temporal expectation may affect the onset, not the rate, of evidence accumulation Sander Nieuwenhuis*, Marieke Jepma & Eric-Jan Wagenmakers

    E-Print Network [OSTI]

    Nieuwenhuis, Sander

    Temporal expectation may affect the onset, not the rate, of evidence accumulation Sander process), enhancing the rate of evidence accumulation, or (less likely given the observed data) a change that the improved performance could be accounted for by an increased evidence-accumulation rate

  12. Parameterization of GDL Liquid Water Front Propagation and Channel Accumulation for Anode Purge Scheduling in Fuel Cells

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    Parameterization of GDL Liquid Water Front Propagation and Channel Accumulation for Anode Purge, and (2) accumulation and transport of liquid water in the Gas Diffusion Layer (GDL) originally presented experimentally iden- tified parameter to match the rate of liquid water accumulation in the anode channel

  13. 978-1-4244-2794-9/09/$25.00 2009 IEEE SMC 2009 Open and Scalable Accumulation and Reuse of

    E-Print Network [OSTI]

    Hsu, Cheng

    978-1-4244-2794-9/09/$25.00 ©2009 IEEE SMC 2009 Open and Scalable Accumulation and Reuse of Common-intensive systems. A new method, called Modelbase, accumulates reusable models (e.g., information, mathematical resources. Every significant company can be assumed to have accumulated a vast amount of slides (charts

  14. Test Response Compaction by an Accumulator Behaving as a Multiple Input Non-Linear Feedback Shift Register

    E-Print Network [OSTI]

    Kavousianos, Xrysovalantis

    Test Response Compaction by an Accumulator Behaving as a Multiple Input Non-Linear Feedback Shift that an accumulator can be modified to behave as a Non-Linear Feedback Shft Register suitable for test response by the proposed scheme is higher than that of the already known accumulator based compaction schemes and in most

  15. Impact Of Particle Agglomeration On Accumulation Rates In The Glass Discharge Riser Of HLW Melter

    SciTech Connect (OSTI)

    Kruger, A. A. [Department of Energy, Office of River Protection, Richland, WA (United States); Rodriguez, C. A. [Pacific Northwest National Laboratory, Richland, WA (United States); Matyas, J. [Pacific Northwest National Laboratory, Richland, WA (United States); Owen, A. T. [Pacific Northwest National Laboratory, Richland, WA (United States); Jansik, D. P. [Pacific Northwest National Laboratory, Richland, WA (United States); Lang, J. B. [Pacific Northwest National Laboratory, Richland, WA (United States)

    2012-11-12T23:59:59.000Z

    The major factor limiting waste loading in continuous high-level radioactive waste (HLW) melters is an accumulation of particles in the glass discharge riser during a frequent and periodic idling of more than 20 days. An excessive accumulation can produce robust layers a few centimeters thick, which may clog the riser, preventing molten glass from being poured into canisters. Since the accumulation rate is driven by the size of particles we investigated with x-ray microtomography, scanning electron microscopy, and image analysis the impact of spinel forming components, noble metals, and alumina on the size, concentration, and spatial distribution of particles, and on the accumulation rate. Increased concentrations of Fe and Ni in the baseline glass resulted in the formation of large agglomerates that grew over the time to an average size of ~185+-155 {mu}m, and produced >3 mm thick layer after 120 h at 850 deg C. The noble metals decreased the particle size, and therefore significantly slowed down the accumulation rate. Addition of alumina resulted in the formation of a network of spinel dendrites which prevented accumulation of particles into compact layers.

  16. Energy spectra and dissipation Mikel Indurain, Equipe Planto

    E-Print Network [OSTI]

    Madeleine, Jean-Baptiste

    Energy spectra and dissipation Mikel Indurain, Equipe Planéto LMD LMDZ.EARTH LMDZ.GENERIC LMDZ.MARS #12;Dissipation : introduction Energy transfer from large scales to small scales. Problem : energy : introduction Energy transfer from large scales to small scales. Problem : energy accumulation if dissipative

  17. Near Isothermal Compressed Air Energy Storage Approach For Off-Shore Wind Energy using an Open Accumulator

    E-Print Network [OSTI]

    Li, Perry Y.

    turbines are under-utilized: typical capacity factor compression/expansion Efficient operation Hybrid hydraulic-pneumatic operation Rapidly rample, capable Sea/ocean as heat sink/source Hydraulic transformer: Efficient, power dense

  18. Cyclone-cyclone Interactions through the Ocean Pathway

    SciTech Connect (OSTI)

    Balaguru, Karthik; Taraphdar, Sourav; Leung, Lai-Yung R.; Foltz, Gregory R.; Knaff, John A.

    2014-10-16T23:59:59.000Z

    The intense SST (Sea Surface Temperature) cooling caused by hurricane-induced mixing is restored at timescales on the order of weeks(1) and thus may persist long enough to influence a later hurricane passing over it. Though many studies have evaluated the effects of SST cool-ing induced by a hurricane on its own intensification(2, 3), none has looked at its effect on later storms. Using an analysis of observations and numerical model simulations, we demonstrate that hurricanes may influence the intensity of later hurricanes that pass over their linger-ing wakes. On average, when hurricanes encounter cold wakes, they experience SSTs that are ~0.4oC lower than when they do not encounter wakes and consequently decay(intensify) at a rate that is nearly three times faster(slower). In the region of warm SSTs (* 26.5oC) where the most intense and damaging hurricanes tend to occur, the percentage of hurricanes that encounter lingering cold wakes increases with hurricane frequency and was found to be as high as 40%. Furthermore, we estimate that the cumulative power dissipated(4) by the most energetic hurricanes has been reduced by as much as ~7% in a season through this effect. As the debate on changes in Atlantic hurricane activity associated with global warming(5) continues, the negative feedback between hurricane frequency and intensity resulting from hurricane-hurricane interactions through the ocean pathway deserves attention.

  19. Demontration of Integrated Optimization Software at the Baldwin Energy Complex

    SciTech Connect (OSTI)

    Rob James; John McDermott; Sanjay Patnaik; Steve Piche`

    2009-01-07T23:59:59.000Z

    This project encompassed the design, development, and demonstration of integrated online optimization systems at Dynegy Midwest Generation's Baldwin Energy Complex (BEC) located in Baldwin, Illinois. The overall project objective was to improve coal-based generation's emission profile, efficiency, maintenance requirements and plant asset life in order to enhance the long-term viability of the United States abundant coal resources. Five separate but integrated optimization products were developed, addressing combustion, sootblowing, SCR operations, overall unit thermal performance, and plant-wide availability optimization. Optimization results are inherently unit-specific and cannot be known for a particular generating unit in advance. However, NeuCo believed that the following were reasonable targets for the completed, integrated set of products: Furnace NOx reduction improvement by 5%, Heat rate improvement by 1.5%, Increase of annual Available MWh by 1.5%, Commensurate reductions in greenhouse gases, mercury, and particulates; and Commensurate increases in profitability from lower costs, improved reliability, and greater commercial availability. The goal during Phase I was to establish each system and demonstrate their integration in unified plant optimization. Efforts during Phase I focused on: (1) developing, deploying, integrating, and testing prototypes for each of the five products; (2) identifying and addressing issues required for the products to integrate with plant operations; and (3) systematically collecting and assimilating feedback to improve subsequent product releases. As described in the Phase II continuation application NeuCo successfully achieved the goal for Phase I. The goal of Phase II was to improve upon the products installed and tested in Phase I and to quantify the benefits of the integrated system. As this report documents, NeuCo has also successfully achieved the goal for Phase II. The overall results of the project, compared with the project goals, are: (1) NOx Reduction: The 5% target for NOx reduction was exceeded with average CEMS and SCR Inlet (furnace) NOx reduction of between 12% and 14%. (2) Heat Rate Improvement: The optimization systems delivered an average heat rate improvement of between 0.67% and 0.7%. This falls short of the 1.5% heat rate improvement target largely because Cyclone Stability (availability) and CEMS and SCR Inlet NOx were prioritized over heat rate in the event they needed to be traded-off with one another. A different prioritization of objectives could have driven a different balance, thereby meeting the target of 1.5% improvement. There were also several factors that could have been masking greater heat rate improvements such as the decrease in fuel density over the course of the project and the impact of actions taken as a result of advice provided by the optimizers that are difficult to quantify. (3) Increased Annual Available MWh: Although difficult to measure precisely, the target of increasing available MWh's by 1.5% was met by providing prioritized alerts and knowledge-based diagnostics for a wide array of plant equipment and process anomalies; helping the plant to move from high sulfur, high Btu Illinois coal to PRB and run that fuel at low stoichiometries without derates; and improved management of cyclone flame quality as well as improved vigilance with respect to cyclone conditions which avoided some degree of temporary de-rate due to cyclone slag build up. (4) Commensurate Reductions in Greenhouse Gases, Mercury, and Particulates: Reductions in all three of these indices can be associated directly with the optimization leverage observed in the heat rate and NOx reductions. (5) Commensurate Increases in Profitability from Lower Costs, Improved Reliability, and Greater Commercial Availability: Commensurate improvements in costs, reliability and availability resulted from the previously described benefits. Also playing a role were the sustained operation of the cyclones while using more available, less expensive but off-design fuel; more effective catal

  20. Design and Prototyping of an Ionization Profile Monitor for the SNS Accumulator Ring

    SciTech Connect (OSTI)

    Bartkoski, Dirk A [ORNL; Deibele, Craig E [ORNL; Polsky, Yarom [ORNL

    2014-12-01T23:59:59.000Z

    An ionization profile monitor (IPM) has been designed for the Spallation Neutron Source (SNS) accumulator ring. Utilizing ionized electrons produced by beam-gas ionization, the SNS IPM uses a 120 kV bias potential to overcome beam space charge and accelerate electrons towards a movable particle detector. A 300 G magnetic field is used to confine the transverse electron motion, resulting in profile errors at the estimated 7% level. With a system bandwidth of 17.5 MHz. The SNS IPM is capable of measuring turn-by-turn beam profiles for a fully accumulated beam. This paper presents a description of the system and design.

  1. Tropical Cyclone Report Hurricane Katrina

    E-Print Network [OSTI]

    northwestward, passing north of Hispaniola and then consolidating just east of the Turks and Caicos during

  2. Tropical Cyclone Report Hurricane Irene

    E-Print Network [OSTI]

    and did not affect the island. The hurricane moved very close to the north coast of Hispaniola on 23's circulation with the high terrain of Hispaniola likely delayed additional intensification. As it moved away from Hispaniola early on 24 August, however, Irene began to strengthen. It became a category 3

  3. Theoretical study of cyclone design

    E-Print Network [OSTI]

    Wang, Lingjuan

    2005-08-29T23:59:59.000Z

    differential equation. Barth??s "static particle" theory, particle (with diameter of d50) collection probability is 50% when the forces acting on it are balanced, combined with the force balance equation was applied in the theoretical analyses for the models...

  4. The economic potential of producing energy from agricultural biomass

    E-Print Network [OSTI]

    Jerko, Christine

    1996-01-01T23:59:59.000Z

    Agricultural biomass is a substitute for fossil fuels, which could provide a sustained energy feedstock and possibly reduce further accumulations of greenhouse gases. However, these feedstocks currently face a market dominated by low cost fossil...

  5. Past Accumulation Rates of the Western Antarctic Ice Sheet Near an Ice Divide

    E-Print Network [OSTI]

    Child, Sarah

    2009-08-12T23:59:59.000Z

    The study of accumulation rates of ice is a direct link to the evolution of ice sheet. It is believed by scientists that ice sheet evolution will aid in the mystery of climate change and may lead to predictions about climates in the future...

  6. Random sequential adsorption model of damage and crack accumulation: Exact one-dimensional results

    E-Print Network [OSTI]

    O. Gromenko; V. Privman; M. L. Glasser

    2008-04-29T23:59:59.000Z

    The random sequential adsorption (RSA) model is modified to describe damage and crack accumulation. The exclusion for object deposition (for damaged region formation) is not for the whole object, as in the standard RSA, but only for the initial point (or higher-dimensional defect) from which the damaged region or crack initiates. The one-dimensional variant of the model is solved exactly.

  7. Exchangeable sodium accumulation and replacement in Southeast Texas soils under turfgrass

    E-Print Network [OSTI]

    Najjar, Namir Fouad

    1995-01-01T23:59:59.000Z

    accumulation but exchangeable Na also increased as a function of years of irrigation. The multiple regression equation: SARE =-5.16 + 0.53 SARiw + 4.04 In (yr) (R2 = 0.86) best predicted SARE to a depth of 30 cm. This study also compared gypsum, a common...

  8. Enhancement of nonlocal spin-valve signal using spin accumulation in local spin-valve configuration

    E-Print Network [OSTI]

    Otani, Yoshichika

    Enhancement of nonlocal spin-valve signal using spin accumulation in local spin-valve configuration) We propose a nonlocal spin-valve measurement combined with a local spin-valve structure to enlarge spin signal. The probe configuration consists of a lateral spin valve with three NiFe wires bridged

  9. Reaction of the accumulation zone portions of glaciers to climatic change

    SciTech Connect (OSTI)

    Whillans, I.M.

    1981-05-20T23:59:59.000Z

    The response of the accumulation regions of glaciers to changes in accumulation rate and in surface temperature is calculated by considering perturbations to the ice flow. The analysis is limited to glaciers in whch flow is dominated by internal shear and not by bottom sliding and for which flowliners are geographically paralled. In general, glaciers begin to alter thickness immediately after a change in accumulation rate, but the effect of a change in surface temperature is delayed by the time for this temperature change to penetrate to depth in the glacier. A warming leads to glacial thinning. The amount and timing of the response is very different for different glaciers. Characteristic times are on the order of tens of years for mountain glaciers and ten of thousands of years for the east antarctic ice sheet. As an example, the theory is applied to the ice sheet near Byrd Station, Antarctica. For hypothetical changes in surface accumulation rate and temperature, rates and amounts of thickness change are calculated, and it is found that the measured thinning is probably too fast to have been caused by climatic variation alone. The effects of hypothetical climatic variations on the depth-age and depth-temperature relationships through the ice sheet are also calculated. It is hoped that the theory will prove valuable in the interpreation of future drill hole results.

  10. Obesity is defined as an excess accumulation of adipose tissue. It occurs in mammalian

    E-Print Network [OSTI]

    Cai, Long

    Obesity is defined as an excess accumulation of adipose tissue. It occurs in mammalian species when, obesity is now at epidemic proportions in the developed world1 , as well as in many developing countries2 . The links between obesity, type 2 diabetes and cardiovascular diseases have long been appreciated. However

  11. Salt Accumulation in the Loessial Sequence in the Be'er Sheva Basin, Israel

    E-Print Network [OSTI]

    Gvirtzman, Haim

    Salt Accumulation in the Loessial Sequence in the Be'er Sheva Basin, Israel MORDECKAIMAGARr / Evidence of climatic changes is recorded in the salt content of the surface sediments in arid zones, In wetter periods airborne salts are removed downward by leaching to the groundwater, whereas in drier

  12. Impact of DNA Twist Accumulation on Progressive Helical Wrapping of Torsionally Constrained DNA

    E-Print Network [OSTI]

    Wang, Wei Hua

    Impact of DNA Twist Accumulation on Progressive Helical Wrapping of Torsionally Constrained DNA Wei (Received 17 July 2012; published 20 November 2012) DNA wrapping is an important mechanism for chromosomal DNA packaging in cells and viruses. Previous studies of DNA wrapping have been performed mostly

  13. Outline Layout Ion Sources Acceleration Accumulation Collision Detectors References Brief Overview of Particle

    E-Print Network [OSTI]

    Budker, Dmitry

    of Particle Accelerators Eugene S. Evans1 February 17, 2010 1 University of California, Berkeley Eugene S. Evans Brief Overview of Particle Accelerators #12;Outline Layout Ion Sources Acceleration Accumulation Collider at CERN Eugene S. Evans Brief Overview of Particle Accelerators #12;Outline Layout Ion Sources

  14. Effects of compost and phosphate on plant arsenic accumulation from soils near pressure-treated wood

    E-Print Network [OSTI]

    Ma, Lena

    Effects of compost and phosphate on plant arsenic accumulation from soils near pressure, USA Received 5 September 2003; accepted 21 May 2004 ``Capsule'': Compost amendment can reduce L.) were grown for ten weeks in the soil with or without compost and phosphate amendments

  15. Edge-spin accumulation in semiconductor two-dimensional hole gases RID E-5081-2010

    E-Print Network [OSTI]

    Nomura, K.; Wunderlich, J.; Sinova, Jairo; Kaestner, B.; MacDonald, AH; Jungwirth, T.

    2005-01-01T23:59:59.000Z

    to detect spin accumulation #1;a#2;: 2DHG channel bordered by an n-type region which forms light-emitting diode #1;LED#2;. Driv- ing a current ILED through the LED results in electroluminescence indicated by the yellow line. Driving a current Ip along...

  16. Mineral transformation and biomass accumulation associated with uranium bioremediation at Rifle, Colorado

    SciTech Connect (OSTI)

    Li, L.; Steefel, C.I.; Williams, K.H.; Wilkins, M.J.; Hubbard, S.S.

    2009-04-20T23:59:59.000Z

    Injection of organic carbon into the subsurface as an electron donor for bioremediation of redox-sensitive contaminants like uranium often leads to mineral transformation and biomass accumulation, both of which can alter the flow field and potentially bioremediation efficacy. This work combines reactive transport modeling with a column experiment and field measurements to understand the biogeochemical processes and to quantify the biomass and mineral transformation/accumulation during a bioremediation experiment at a uranium contaminated site near Rifle, Colorado. We use the reactive transport model CrunchFlow to explicitly simulate microbial community dynamics of iron and sulfate reducers, and their impacts on reaction rates. The column experiment shows clear evidence of mineral precipitation, primarily in the form of calcite and iron monosulfide. At the field scale, reactive transport simulations suggest that the biogeochemical reactions occur mostly close to the injection wells where acetate concentrations are highest, with mineral precipitate and biomass accumulation reaching as high as 1.5% of the pore space. This work shows that reactive transport modeling coupled with field data can be an effective tool for quantitative estimation of mineral transformation and biomass accumulation, thus improving the design of bioremediation strategies.

  17. Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation

    E-Print Network [OSTI]

    Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat change. In this study, peat cores up to 2 m in depth from four moss banks on Signy Island were used included radiocarbon dating (to determine peat accumulation rates) and stable carbon isotope composition

  18. DIVISION S-10--WETLAND SOILS Carbon Accumulation and Storage in Mineral Subsoil beneath Peat

    E-Print Network [OSTI]

    Moore, Tim

    DIVISION S-10--WETLAND SOILS Carbon Accumulation and Storage in Mineral Subsoil beneath Peat Tim R subsoil (Turunen and Moore, 2003). TheyWe showed that sandy subsoils beneath peat near Ramsey Lake conditions beneath the peat. soils beneath the forest, those beneath the peat contained similar In this paper

  19. Selenium Accumulation, Distribution, and Speciation in Spineless Prickly Pear Cactus: A Drought-and

    E-Print Network [OSTI]

    Selenium Accumulation, Distribution, and Speciation in Spineless Prickly Pear Cactus: A Drought.H. Pilon-Smits, and John L. Freeman2 Agricultural Research Service, United States Department of Agriculture published report of these detrimental effects, which have also occurred in other Se-rich areas (Ohlendorf et

  20. Syntectonic hydrocarbon migration and accumulation in Miley Reservoir, Rincon field, Ventura County, California

    SciTech Connect (OSTI)

    Nelson, D.E.; Harrison, R.A.

    1987-05-01T23:59:59.000Z

    The Miley reservoir of the Rincon field is located in the Central Transverse Ranges of southern California on a structural high that borders the Santa Barbara Channel. The east-west-trending Rincon and Ventura anticlines are part of a major oil-productive trend containing the Rincon, San Miguelito, and Ventura Avenue fields, which have estimated ultimate recovery of 1.7 billion BOE. Hydrocarbon accumulations in the multiple and stacked reservoirs within these three fields are controlled by the complex interplay of late Pleistocene folding and reverse fault development. The detailed interpretation reported here combines reservoir performance data with subsurface structural geology and sequential tectonic development to provide a new understanding of the relationship of migration barriers to oil accumulation and production. The Miley reservoir is an axial- and fault-controlled accumulation on the eastern terminus of the Rincon anticline. It is located in a structural saddle formed by the doubly plunging Rincon and Ventura anticlinal trend. Three operative trapping mechanisms confine oil pools: (1) axial accumulations associated with reverse fault closures; (2) traps on the hanging wall of dip-slip reverse faults; and (3) a permeability barrier developed in response to flexural slip folding. Oil trapped within the Rincon-Miley reservoir was primarily generated beneath the Santa Barbara Channel and migrated up the south flank of the anticlinal trend. Four stages of structural development and hydrocarbon migration, encompassing the last 700,000 years, have implications for the enhanced development of reservoirs on this anticlinal trend.

  1. ESTIMATION OF SNOW ACCUMULATION IN ANTARCTICA USING AUTOMATED ACOUSTIC DEPTH GAUGE MEASUREMENTS

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    ESTIMATION OF SNOW ACCUMULATION IN ANTARCTICA USING AUTOMATED ACOUSTIC DEPTH GAUGE MEASUREMENTS microwave sounders, snow gauges, or radar are not feasible or not available in Antarctica at the present precipitation, remains largely unknown. Acoustic depth gauges (ADG) provide the only concrete real

  2. Accumulated destructive effect of nanosecond repetitive voltage pulses on the insulated coatings of Fe-based nanocrystalline ribbon

    SciTech Connect (OSTI)

    Zhang, Yu; Liu, Jinliang [College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)] [College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

    2013-03-11T23:59:59.000Z

    Fe-based nanocrystalline ribbon is widely employed in pulsed power devices and accelerators. A temperature accumulation model is put forward to explain the accumulated destructive effect of discharge plasma bombardment on the TiO{sub 2} coatings of nanocrystalline ribbon under 50 Hz/100 ns voltage pulses. Experimental results revealed that the plasma channel expansion caused by air breakdown in the coating crack heated the coating repetitively, and the coating temperature was increased and accumulated around the crack. The fact that repetitive voltage pulses were more destructive than a single pulse with the same amplitude was caused by the intensified coating ablation under the temperature accumulation effect.

  3. Experimental Neutron-Induced Fission Fragment Mass Yields of 232Th and 238U at Energies from 10 to 33 MeV

    E-Print Network [OSTI]

    V. D. Simutkin; S. Pomp; J. Blomgren; M. sterlund; R. Bevilacqua; I. V. Ryzhov; G. A. Tutin; S. G. Yavshits; L. A. Vaishnene; M. S. Onegin; J. P. Meulders; R. Prieels

    2013-04-08T23:59:59.000Z

    Development of nuclear energy applications requires data for neutron-induced reactions for actinides in a wide neutron energy range. Here we describe measurements of pre-neutron emission fission fragment mass yields of 232Th and 238U at incident neutron energies from 10 to 33 MeV. The measurements were done at the quasi-monoenergetic neutron beam of the Louvain-la-Neuve cyclotron facility CYCLONE; a multi-section twin Frisch-gridded ionization chamber was used to detect fission fragments. For the peak neutron energies at 33, 45 and 60 MeV, the details of the data analysis and the experimental results have been published before and in this work we present data analysis in the low-energy tail of the neutron energy spectra. The preliminary measurement results are compared with available experimental data and theoretical predictions.

  4. Universality of electron accumulation at wurtzite c-and a-plane and zinc-blende InN surfaces

    E-Print Network [OSTI]

    As, Donat Josef

    Universality of electron accumulation at wurtzite c- and a-plane and zinc- blende InN surfaces P. D 27 August 2007 Electron accumulation is found to occur at the surface of wurtzite 112¯0 , 0001.6 Experimental studies to date have focused on wurtzite c-plane surfaces,1­3,7 although pre- vious

  5. Regression-based estimates of the rate of accumulation of anthropogenic CO2 in the ocean: A fresh look

    E-Print Network [OSTI]

    and guidelines for improvement are presented. Following these guidelines leads to a local two- regression method to quantify the rate of accumulation. While a formal measure of the accumulation rate's uncertainty profiling floats capable of the same sorts of measurements as obtained by the hydrographic surveys were

  6. 1640 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 26, NO. 12, JUNE 15, 2008 Jitter and Amplitude Noise Accumulations in

    E-Print Network [OSTI]

    Kolner, Brian H.

    1640 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 26, NO. 12, JUNE 15, 2008 Jitter and Amplitude Noise investigate jitter accumulations in cas- caded all-optical 2R regenerators. The simulation results indicate that when the pattern dependence from the memory effect is min- imized, the jitter accumulation depends

  7. High-field penning-malmberg trap: confinement properties and use in positron accumulation

    SciTech Connect (OSTI)

    Hartley, J.H.

    1997-09-01T23:59:59.000Z

    This dissertation reports on the development of the 60 kG cryogenic positron trap at Lawrence Livermore National Laboratory, and compares the trap`s confinement properties with other nonneutral plasma devices. The device is designed for the accumulation of up to 2{times}10{sup 9} positrons from a linear-accelerator source. This positron plasma could then be used in Bhabha scattering experiments. Initial efforts at time-of-flight accumulation of positrons from the accelerator show rapid ({approximately}100 ms) deconfinement, inconsistent with the long electron lifetimes. Several possible deconfinement mechanisms have been explored, including annihilation on residual gas, injection heating, rf noise from the accelerator, magnet field curvature, and stray fields. Detailed studies of electron confinement demonstrate that the empirical scaling law used to design the trap cannot be extrapolated into the parameter regime of this device. Several possible methods for overcoming these limitations are presented.

  8. The giant low-density lipoproteins (LDL) accumulation in the multi-layer artery wall model

    E-Print Network [OSTI]

    Katarzyna Jesionek; Marcin Kostur

    2014-09-02T23:59:59.000Z

    The mathematical, four-layer model of the LDL transport across the arterial wall including the sensitivity of the transport coefficients to the wall shear stress (WSS) is studied. In that model the advection-diffusion equations in porous media are used to determine the LDL concentration profiles in each layer of the arterial wall. We demonstrate the effect of the giant accumulation of the LDL in the intima layer. This property turns out to be an interplay between the layered structure of the arterial wall and WSS sensitivity of the endothelium. Interestingly, we also show that the single-layer models with the same WSS sensitivity mechanism and corresponding parameters, obscure the accumulation phenomenon, which predicts the one order of magnitude larger LDL concentration.

  9. Accumulation and extraction of ultracold neutrons from a superfluid helium converter coated with fluorinated grease

    E-Print Network [OSTI]

    O. Zimmer; P. Schmidt-Wellenburg; M. Assmann; M. Fertl; J. Klenke; S. Mironov; H. -F. Wirth; B. van den Brandt

    2008-01-31T23:59:59.000Z

    We report experiments on the production of ultracold neutrons (UCN) in a converter of superfluid helium coated with fluorinated grease. We employed our technique of window-free extraction of accumulated UCN from the helium, in which they were produced by downscattering neutrons of a cold beam from the Munich research reactor. The time constant for UCN passage through the same extraction aperture as in a previous experiment was a factor two shorter, despite a lower mean velocity of the accumulated UCN in the present experiments. A time-of-flight measurement of the cold neutron spectrum incident on the converter allowed us to estimate the multi-phonon contribution to the UCN production. The UCN production rate inferred from two methods agrees with the theoretical expectation.

  10. Exponential Decay of Eigenfunctions and Accumulation of Eigenvalues on Manifolds with Axial Analytic Asymptotically Cylindrical Ends

    E-Print Network [OSTI]

    Victor Kalvin

    2010-07-25T23:59:59.000Z

    In this paper we continue our study of the Laplacian on manifolds with axial analytic asymptotically cylindrical ends initiated in~arXiv:1003.2538. By using the complex scaling method and the Phragm\\'{e}n-Lindel\\"{o}f principle we prove exponential decay of the eigenfunctions corresponding to the non-threshold eigenvalues of the Laplacian on functions. In the case of a manifold with (non-compact) boundary it is either the Dirichlet Laplacian or the Neumann Laplacian. We show that the rate of exponential decay of an eigenfunction is prescribed by the distance from the corresponding eigenvalue to the next threshold. Under our assumptions on the behaviour of the metric at infinity accumulation of isolated and embedded eigenvalues occur. The results on decay of eigenfunctions combined with the compactness argument due to Perry imply that the eigenvalues can accumulate only at thresholds and only from below. The eigenvalues are of finite multiplicity.

  11. Liquid over-feeding refrigeration system and method with integrated accumulator-expander-heat exchanger

    DOE Patents [OSTI]

    Mei, Viung C. (Oak Ridge, TN); Chen, Fang C. (Knoxville, TN)

    1997-01-01T23:59:59.000Z

    A refrigeration system having a vapor compression cycle utilizing a liquid over-feeding operation with an integrated accumulator-expander-heat exchanger. Hot, high-pressure liquid refrigerant from the condenser passes through one or more lengths of capillary tubing substantially immersed in a pool liquid refrigerant in the accumulator-expander-heat exchanger for simultaneously sub-cooling and expanding the liquid refrigerant while vaporizing liquid refrigerant from the pool for the return thereof to the compressor as saturated vapor. The sub-cooling of the expanded liquid provides for the flow of liquid refrigerant into the evaporator for liquid over-feeding the evaporator and thereby increasing the efficiency of the evaporation cycle.

  12. Liquid over-feeding refrigeration system and method with integrated accumulator-expander-heat exchanger

    DOE Patents [OSTI]

    Mei, V.C.; Chen, F.C.

    1997-04-22T23:59:59.000Z

    A refrigeration system is described having a vapor compression cycle utilizing a liquid over-feeding operation with an integrated accumulator-expander-heat exchanger. Hot, high-pressure liquid refrigerant from the condenser passes through one or more lengths of capillary tubing substantially immersed in a pool liquid refrigerant in the accumulator-expander-heat exchanger for simultaneously sub-cooling and expanding the liquid refrigerant while vaporizing liquid refrigerant from the pool for the return thereof to the compressor as saturated vapor. The sub-cooling of the expanded liquid provides for the flow of liquid refrigerant into the evaporator for liquid over-feeding the evaporator and thereby increasing the efficiency of the evaporation cycle. 4 figs.

  13. Infrared Imaging of the Nanometer-Thick Accumulation Layer in Organic Field-Effect Transistors

    E-Print Network [OSTI]

    Z. Q. Li; G. M. Wang; N. Sai; D. Moses; M. C. Martin; M. Di Ventra; A. J. Heeger; D. N. Basov

    2006-02-09T23:59:59.000Z

    We report on infrared (IR) spectro-microscopy of the electronic excitations in nanometer-thick accumulation layers in FET devices based on poly(3-hexylthiophene). IR data allows us to explore the charge injection landscape and uncovers the critical role of the gate insulator in defining relevant length scales. This work demonstrates the unique potential of IR spectroscopy for the investigation of physical phenomena at the nanoscale occurring at the semiconductor-insulator interface in FET devices.

  14. Two Approaches to Evaluate Drought Tolerance in Maize: Seedling Stress Response and Epicuticular Wax Accumulation

    E-Print Network [OSTI]

    Meeks, Meghyn

    2010-12-02T23:59:59.000Z

    Drought Tolerance in Maize: Seedling Stress Response and Epicuticular Wax Accumulation. (December 2010) Meghyn Brianne Meeks, B.S., Tarleton State University Co-Chairs of Advisory Committee: Dr. Seth Murray We wanted to develop rapid and cost... Texas the epicenter of drought in the US (National Climatic Data Center, 2010). National losses in 2008 were an estimated $2.0 billion and more than $5.0 billion in 2009 (National Climatic Data Center, 2010b). Since national agriculture production...

  15. Stringency without guanosine-3'-diphosphate-5'-diphosphate accumulation during amino acid starvation in Rhodopseudomonas sphaeroides

    E-Print Network [OSTI]

    Martinez de Acosta, Maria Ruth Guadalupe

    1985-01-01T23:59:59.000Z

    STRINGENCY WITHOUT GUANOSINE-3'-DIPHOSPHATE-5'-DIPHOSPHATE ACCUMULATION DURING AMINO ACID STARVATION IN RHODOPSEUDOMONAS SPHAEROIDES A Thesis by MARIA RUTH GUADALUPE MARTINEZ DE ACOSTA Submitted to the Graduate College of Texas ARM... IN RHODOPSEUDOMONAS SPHAEROIDES A Thesis by MARIA RUTH GUADALUPE MARTINEZ DE ACOSTA Approved as to style and content by: on a . u tng (Chairman of Committee) ayne . tc o (Member) tmot y a (Head of Department) ona . ttgrew (Member) December 1985 ABSTRACT...

  16. Optical absorption in silicon layers in the presence of charge inversion/accumulation or ion implantation

    SciTech Connect (OSTI)

    Alloatti, L.; Lauermann, M.; Koos, C.; Freude, W. [Institutes IPQ and IMT, Karlsruhe Institute of Technology (KIT), Karlsruhe 76131 (Germany)] [Institutes IPQ and IMT, Karlsruhe Institute of Technology (KIT), Karlsruhe 76131 (Germany); Srgers, C. [Physikalisches Institut and DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology, P. O. Box 6980, Karlsruhe 76049 (Germany)] [Physikalisches Institut and DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology, P. O. Box 6980, Karlsruhe 76049 (Germany); Leuthold, J. [Institutes IPQ and IMT, Karlsruhe Institute of Technology (KIT), Karlsruhe 76131 (Germany) [Institutes IPQ and IMT, Karlsruhe Institute of Technology (KIT), Karlsruhe 76131 (Germany); Institute of Electromagnetic Fields (IFH), ETH Zurich, Zurich (Switzerland)

    2013-07-29T23:59:59.000Z

    We determine the optical losses in gate-induced charge accumulation/inversion layers at a Si/SiO{sub 2} interface. Comparison between gate-induced charge layers and ion-implanted thin silicon films having an identical sheet resistance shows that optical losses can be significantly lower for gate-induced layers. For a given sheet resistance, holes produce higher optical loss than electrons. Measurements have been performed at ? = 1550 nm.

  17. Stringency without guanosine-3'-diphosphate-5'-diphosphate accumulation during amino acid starvation in Rhodopseudomonas sphaeroides

    E-Print Network [OSTI]

    Martinez de Acosta, Maria Ruth Guadalupe

    1985-01-01T23:59:59.000Z

    STRINGENCY WITHOUT GUANOSINE-3'-DIPHOSPHATE-5'-DIPHOSPHATE ACCUMULATION DURING AMINO ACID STARVATION IN RHODOPSEUDOMONAS SPHAEROIDES A Thesis by MARIA RUTH GUADALUPE MARTINEZ DE ACOSTA Submitted to the Graduate College of Texas ARM... IN RHODOPSEUDOMONAS SPHAEROIDES A Thesis by MARIA RUTH GUADALUPE MARTINEZ DE ACOSTA Approved as to style and content by: on a . u tng (Chairman of Committee) ayne . tc o (Member) tmot y a (Head of Department) ona . ttgrew (Member) December 1985 ABSTRACT...

  18. Free carrier accumulation at cubic AlGaN/GaN heterojunctions Q. Y. Wei,1

    E-Print Network [OSTI]

    As, Donat Josef

    ) substrate,7 with GaN and AlGaN layer thickness of 600 nm and 30 nm, respectively. The layer thicknessFree carrier accumulation at cubic AlGaN/GaN heterojunctions Q. Y. Wei,1 T. Li,1 J. Y. Huang,1 F. A (Received 24 February 2012; accepted 19 March 2012; published online 3 April 2012) Cubic Al0.3Ga0.7N/GaN

  19. Export is the default pathway for soluble unfolded polypeptides that accumulate during expression in Escherichia coli

    SciTech Connect (OSTI)

    Scotto-Lavino, E.; Freimuth, P.; Bai, M.; Zhang, Y.-B.

    2011-09-01T23:59:59.000Z

    Several E. coli endogenous, cytoplasmic proteins that are known clients of the chaperonin GroEL were overexpressed to examine the fate of accumulated unfolded polypeptides. Substantial fractions of about half of the proteins formed insoluble aggregates, consistent with the hypothesis that these proteins were produced at rates or in amounts that exceeded the protein-folding capacity of GroEL. In addition, large fractions of three overexpressed GroEL client proteins were localized in an extra-cytoplasmic, osmotically-sensitive compartment, suggesting they had initially accumulated in the cytoplasm as soluble unfolded polypeptides and thus were able to access a protein export pathway. Consistent with this model, an intrinsically unfoldable, hydrophilic, non-secretory polypeptide was quantitatively exported from the E. coli cytoplasm into an osmotically-sensitive compartment. Our results support the conclusion that a soluble, unfolded conformation alone may be sufficient to direct non-secretory polypeptides into a protein export pathway for signal peptide-independent translocation across the inner membrane, and that export rather than degradation by cytoplasmic proteases is the preferred fate for newly-synthesized, soluble, unfolded polypeptides that accumulate in the cytoplasm. The stable folded conformation of exported GroEL client proteins further suggests that the requirement for GroEL may be conditional on protein folding in the molecularly-crowded environment of the cytoplasm.

  20. The accumulation effect of positrons in the stack of foils, detected by measurements of the positron implantation profile

    SciTech Connect (OSTI)

    Dryzek, Jerzy [Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342 Krakw (Poland); Institute of Physics, Opole University, ul. Oleska 48, 45-052 Opole (Poland); Siemek, Krzysztof [Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342 Krakw (Poland)

    2013-12-14T23:59:59.000Z

    The profiles of positrons implanted from the radioactive source {sup 22}Na into a stack of foils and plates are the subject of our experimental and theoretical studies. The measurements were performed using the depth scanning of positron implantation profile method, and the theoretical calculations using the phenomenological multi-scattering model (MSM). Several stacks consisting of silver, gold and aluminum foils, and titanium and germanium plates were investigated. We notice that the MSM describes well the experimental profiles; however when the stack consisting of silver and gold foils, the backscattering and linear absorption coefficients differ significantly from those reported in the literature. We suggest the energy dependency of the backscattering coefficient for silver and gold. In the stacks which comprise titanium and germanium plates, there were observed the features, which indicate the presence of the accumulation effect in the experimental implantation profile. This effect was previously detected in implantation profiles in Monte Carlo simulations using the GEANT4 tool kit, and it consists in higher localization of positrons close the interface. We suppose that this effect can be essential for positron annihilation in any heterogeneous materials.