National Library of Energy BETA

Sample records for high yield tropical

  1. Olefins from High Yield Autothermal Reforming Process

    Energy Innovation Portal (Marketing Summaries) [EERE]

    2012-03-06

    The autothermal reforming method employs an improved dehydrogenation process for olefin production, utilizing platinum based dehydrogenation catalysts in the presence of oxygen. The autothermal process requires no external energy input following ignition and produces high conversions and yields from the gaseous hydrocarbon feeds. Autothermal reforming is an effective solution that meets the high demands of the chemical market industry by producing high yields...

  2. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    Laser Seeding Yields High-Power Coherent Terahertz Radiation Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Wednesday, 25 April 2007 00:00 Researchers at...

  3. Energy Design Guidelines for High Performance Schools: Tropical Island Climates

    SciTech Connect (OSTI)

    2004-11-01

    Design guidelines outline high performance principles for the new or retrofit design of K-12 schools in tropical island climates. By incorporating energy improvements into construction or renovation plans, schools can reduce energy consumption and costs.

  4. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Researchers at Berkeley Lab have been exploring the ways coherent synchrotron radiation (CSR) is generated in...

  5. Critical Review Microbial Electrolysis Cells for High Yield Hydrogen Gas

    E-Print Network [OSTI]

    Critical Review Microbial Electrolysis Cells for High Yield Hydrogen Gas Production from Organic A S S E , , § A N D R E N ´E A . R O Z E N D A L | Hydrogen Energy Center, and Department of Civil.2 V in practice) in specially designed microbial electrolysis cells (MECs), can result in a high yield

  6. Renewable Energy Executive Summary High-Yield Scenario

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

    Efficiency & Renewable Energy Executive Summary High-Yield Scenario Workshop Series Report INLEXT-10-18930 December 2009 The 2005 Billion-Ton Study a (BTS) esti- mates the amount...

  7. High yield fusion in a staged Z-pinch

    E-Print Network [OSTI]

    RAHMAN, H. U; WESSEL, F. J; ROSTOKER, N.; NEY, P. H

    2009-01-01

    z-pinch for controlled fusion. PHYSICS OF PLASMAS, 8:616,N. Rostoker. Thermonuclear fusion by a z-? pinch. In DenseHigh yield fusion in a Staged Z-pinch H. U. Rahman, F. J.

  8. Yield

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLos Alamos verifies largest single|Yejun Feng ArgonneYield scalings of

  9. Air Cushion Press for Excellent Uniformity, High Yield, and Fast

    E-Print Network [OSTI]

    Air Cushion Press for Excellent Uniformity, High Yield, and Fast Nanoimprint Across a 100 mm Field, air cushion press (ACP), in which the mold and substrate are pressed against each other by gas pressure rather than solid plates, and compared it with a common method, solid parallel-plate press (SPP

  10. Executive Summary High-Yield Scenario Workshop Series Report

    SciTech Connect (OSTI)

    Leslie Park Ovard; Thomas H. Ulrich; David J. Muth Jr.; J. Richard Hess; Steven Thomas; Bryce Stokes

    2009-12-01

    To get a collective sense of the impact of research and development (R&D) on biomass resource availability, and to determine the feasibility that yields higher than baseline assumptions used for past assessments could be achieved to support U.S. energy independence, an alternate “High-Yield Scenario” (HYS) concept was presented to industry experts at a series of workshops held in December 2009. The workshops explored future production of corn/agricultural crop residues, herbaceous energy crops (HECs), and woody energy crops (WECs). This executive summary reports the findings of that workshop.

  11. Very high resolution precipitation climatologies from the Tropical Rainfall Measuring Mission precipitation radar

    E-Print Network [OSTI]

    Nesbitt, Steve

    Very high resolution precipitation climatologies from the Tropical Rainfall Measuring Mission precipitation radar Stephen W. Nesbitt1 and Alison M. Anders2 Received 4 March 2009; revised 6 July 2009 of topography and precipitation, a tropics-wide (±36° latitude) high resolution (0.1°) ten year (1998

  12. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHigh energy neutronHigh-Pressure MOF Research YieldsHigh-Pressure

  13. Irrigated Sugarbeets: Yield Response and Profit Implications, Texas High Plains. 

    E-Print Network [OSTI]

    Lansford, Vernon D.; Winter S.R.; Harman, W.L.

    1990-01-01

    ; Haddock, 1959; Erie and French, 1968; Parashar and Dastane, 1973; Carter, 1980b; Barbieri, 1982; Winter, 1989). Research indicates that excessively high levels of nitrogen lowers sugar content. Nicholson et al. (1974), in Colorado, developed a mul..., using experimental data from Arizona, Colorado, and Texas, developed production functions reflecting the yield-water-nitrogen relationships for sugar beets. The ability to explain these relationships varied from site to site and year to year. A range...

  14. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHigh energy neutronHigh-Pressure MOF Research Yields Structural

  15. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHigh energy neutronHigh-Pressure MOF Research Yields

  16. Fusion neutron yield from high intensity laser-cluster interaction

    SciTech Connect (OSTI)

    Davis, J.; Petrov, G.M.; Velikovich, A.L. [Naval Research Laboratory, Plasma Physics Division, 4555 Overlook Avenue SW, Washington, DC 20375 (United States)

    2006-06-15

    The fusion neutron yield from a compact neutron source is studied. Laser-irradiated deuterium clusters serve as a precursor of high-energy deuterium ions, which react with the walls of a fusion reaction chamber and produce copious amounts of neutrons in fusion reactions. The explosion of deuterium clusters with initial radius of 50-200 A irradiated by a subpicosecond laser with intensity of 10{sup 16} W/cm{sup 2} is examined theoretically. We studied the conversion efficiency of laser energy to ion kinetic energy, the mean and maximum ion kinetic energy, and ion energy distribution function by a molecular dynamics model. A yield of {approx}10{sup 5}-10{sup 6} neutrons/J is obtainable for a peak laser intensity of 10{sup 16}-10{sup 17} W/cm{sup 2} and clusters with an initial radius of 200-400 A.

  17. A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator

    E-Print Network [OSTI]

    Waldmann, Ole

    2011-01-01

    a Compact High-Yield Neutron Generator O. Waldmann 1 , B.Compact High-Yield Neutron Generator ? O. Waldmann a and B.yield compact neutron generator for active interrogation

  18. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenry Bellamy, Ph.D. Title: ProfessorHigh-Pressure MOF Research Yields

  19. ZeaChem Pilot Project: High-Yield Hybrid Cellulosic Ethanol Process...

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

    ZeaChem Pilot Project: High-Yield Hybrid Cellulosic Ethanol Process Using High-Impact Feedstock for Commercialization ZeaChem Pilot Project: High-Yield Hybrid Cellulosic Ethanol...

  20. Film quantum yields of EUV& ultra-high PAG photoresists

    SciTech Connect (OSTI)

    Hassanein, Elsayed; Higgins, Craig; Naulleau, Patrick; Matyi, Richard; Gallatin, Greg; Denbeaux, Gregory; Antohe, Alin; Thackery, Jim; Spear, Kathleen; Szmanda, Charles; Anderson, Christopher N.; Niakoula, Dimitra; Malloy, Matthew; Khurshid, Anwar; Montgomery, Cecilia; Piscani, Emil C.; Rudack, Andrew; Byers, Jeff; Ma, Andy; Dean, Kim; Brainard, Robert

    2008-01-10

    Base titration methods are used to determine C-parameters for three industrial EUV photoresist platforms (EUV-2D, MET-2D, XP5496) and twenty academic EUV photoresist platforms. X-ray reflectometry is used to measure the density of these resists, and leads to the determination of absorbance and film quantum yields (FQY). Ultrahigh levels ofPAG show divergent mechanisms for production of photo acids beyond PAG concentrations of 0.35 moles/liter. The FQY of sulfonium PAGs level off, whereas resists prepared with iodonium PAG show FQY s that increase beyond PAG concentrations of 0.35 moles/liter, reaching record highs of 8-13 acids generatedlEUV photons absorbed.

  1. Towards Direct Simulation of Future Tropical Cyclone Statistics in a High-Resolution Global Atmospheric Model

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

    Wehner, Michael F.; Bala, G.; Duffy, Phillip; Mirin, Arthur A.; Romano, Raquel

    2010-01-01

    We present a set of high-resolution global atmospheric general circulation model (AGCM) simulations focusing on the model's ability to represent tropical storms and their statistics. We find that the model produces storms of hurricane strength with realistic dynamical features. We also find that tropical storm statistics are reasonable, both globally and in the north Atlantic, when compared to recent observations. The sensitivity of simulated tropical storm statistics to increases in sea surface temperature (SST) is also investigated, revealing that a credible late 21st century SST increase produced increases in simulated tropical storm numbers and intensities in all ocean basins. Whilemore »this paper supports previous high-resolution model and theoretical findings that the frequency of very intense storms will increase in a warmer climate, it differs notably from previous medium and high-resolution model studies that show a global reduction in total tropical storm frequency. However, we are quick to point out that this particular model finding remains speculative due to a lack of radiative forcing changes in our time-slice experiments as well as a focus on the Northern hemisphere tropical storm seasons.« less

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

    SciTech Connect (OSTI)

    Lackmann, Gary

    2013-06-10

    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.

  3. High-Yield Synthesis of Stoichiometric Boron Nitride Nanostructures

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

    Nocua, José E.; Piazza, Fabrice; Weiner, Brad R.; Morell, Gerardo

    2009-01-01

    Boron nitride (BN) nanostructures are structural analogues of carbon nanostructures but have completely different bonding character and structural defects. They are chemically inert, electrically insulating, and potentially important in mechanical applications that include the strengthening of light structural materials. These applications require the reliable production of bulk amounts of pure BN nanostructures in order to be able to reinforce large quantities of structural materials, hence the need for the development of high-yield synthesis methods of pure BN nanostructures. Using borazine ( B 3 N 3 H 6 ) asmore »chemical precursor and the hot-filament chemical vapor deposition (HFCVD) technique, pure BN nanostructures with cross-sectional sizes ranging between 20 and 50?nm were obtained, including nanoparticles and nanofibers. Their crystalline structure was characterized by (XRD), their morphology and nanostructure was examined by (SEM) and (TEM), while their chemical composition was studied by (EDS), (FTIR), (EELS), and (XPS). Taken altogether, the results indicate that all the material obtained is stoichiometric nanostructured BN with hexagonal and rhombohedral crystalline structure. « less

  4. A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator

    E-Print Network [OSTI]

    Waldmann, Ole

    2011-01-01

    permanent-magnet microwave ion source for the high-yield neutron generator.Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron GeneratorPermanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator ?

  5. High yield fusion in a staged Z-pinch

    E-Print Network [OSTI]

    RAHMAN, H. U; WESSEL, F. J; ROSTOKER, N.; NEY, P. H

    2009-01-01

    D calculations the predicted fusion-energy yield was 70 MJ,implosion parameters, net-fusion energy is produced. In then x 0.248, and scaled fusion energy, E f x 0.199. Near peak

  6. Co-solvent Pretreatment Reduces Costly Enzyme Requirements for High Sugar and Ethanol Yields from

    E-Print Network [OSTI]

    California at Riverside, University of

    Co-solvent Pretreatment Reduces Costly Enzyme Requirements for High Sugar and Ethanol Yields from limits potential sugar yields.[7] Thus, it is desirable We introduce a new pretreatment called co-solvent

  7. High Cloud Properties from Three Years of MODIS Terra and Aqua Collection-4 Data over the Tropics

    E-Print Network [OSTI]

    Baum, Bryan A.

    High Cloud Properties from Three Years of MODIS Terra and Aqua Collection-4 Data over the Tropics) ABSTRACT This study surveys the optical and microphysical properties of high (ice) clouds over the Tropics on the gridded level-3 cloud products derived from the measurements acquired by the Moderate Resolution Imaging

  8. Bio-Char Soil Management on Highly Weathered Soils in the Humid Tropics

    E-Print Network [OSTI]

    Lehmann, Johannes

    36 Bio-Char Soil Management on Highly Weathered Soils in the Humid Tropics Johannes Lehmann1), ColombiaQ1 CONTENTS 36.1 Bio-Char Management and Soil Nutrient Availability ............................................. 518 36.2 Microbial Cycling of Nutrients in Soils with Bio-Char

  9. Monitoring groundwater storage changes in the highly1 seasonal humid tropics: validation of GRACE measurements2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Monitoring groundwater storage changes in the highly1 seasonal humid tropics: validation of GRACE the seasonality and trend in groundwater storage associated with intensive groundwater19 abstraction for dry to 2007) groundwater storage changes21 (GWS) correlate well (r=0.77 to 0.93, p-value

  10. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResourcelogo and- Energy InnovationLaser Seeding Yields

  11. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHigh energy neutron ComputedHigh-PerformanceHigh-Pressure MOF

  12. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHigh energy neutron ComputedHigh-PerformanceHigh-Pressure

  13. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHigh energy neutron

  14. Clickstream data yields high-resolution maps of science

    SciTech Connect (OSTI)

    Bollen, Johan [Los Alamos National Laboratory; Van De Sompel, Herbert [Los Alamos National Laboratory; Hagberg, Aric [Los Alamos National Laboratory; Bettencourt, Luis [Los Alamos National Laboratory; Chute, Ryan [Los Alamos National Laboratory; Rodriguez, Marko A [Los Alamos National Laboratory; Balakireva, Lyudmila [Los Alamos National Laboratory

    2009-01-01

    Intricate maps of science have been created from citation data to visualize the structure of scientific activity. However, most scientific publications are now accessed online. Scholarly web portals record detailed log data at a scale that exceeds the number of all existing citations combined. Such log data is recorded immediately upon publication and keeps track of the sequences of user requests (clickstreams) that are issued by a variety of users across many different domains. Given these advantagees of log datasets over citation data, we investigate whether they can produce high-resolution, more current maps of science.

  15. High-Pressure MOF Research Yields Structural Insights

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenry Bellamy, Ph.D. Title: ProfessorHigh-Pressure MOF Research

  16. Inertial Confinement Fusion Ignition and High Yield The Inertial Confinement Fusion Ignition and High Yield (ICF) program supports the U.S. Department of Energy's (DOE)

    E-Print Network [OSTI]

    ) physics for the validation of codes and models necessary to maintain a safe, secure, and effective nuclear is essential to having confidence in them. More than 99 percent of the energy from a nuclear weapon Ignition and High Yield (ICF) program supports the U.S. Department of Energy's (DOE) national security

  17. A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator

    E-Print Network [OSTI]

    A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator O. Waldmanna-yield compact neutron generator for active interrogation applications. The sealed tube generator will be capable with an optimized magnetic field. Keywords: Neutron generator, Microwave ion source, Active interroga- tion PACS: 29

  18. High-Yield Solvothermal Synthesis of Magnetic Peapod Nanocomposites via the Capture of Preformed Nanoparticles in

    E-Print Network [OSTI]

    Spinu, Leonard

    , nanocomposite, solvothermal synthesis, nanoparticle encapsulation, layered inorganic nanostructuresHigh-Yield Solvothermal Synthesis of Magnetic Peapod Nanocomposites via the Capture of Preformed Spinu,,§ and John B. Wiley*,, Department of Chemistry, Advanced Materials Research Institute

  19. 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

    2012-06-01

    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 presented as powerful tools that distill complex datasets into concise statements on likely impact, and as highly effective communication devices. Capsule: "Combining dynamical modeling of high-impact weather using traditional regional climate models with statistical techniques allows for comprehensive sampling of the full distribution, uncertainty estimation, direct assessment of impacts, and increased confidence in future changes."

  20. 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

    2013-10-19

    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.

  1. Mass production of multi-wall carbon nanotubes by metal dusting process with high yield

    SciTech Connect (OSTI)

    Ghorbani, H. [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Narmak, Tehran (Iran, Islamic Republic of)] [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Narmak, Tehran (Iran, Islamic Republic of); Rashidi, A.M., E-mail: Rashidiam@ripi.ir [Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), West Blvd. Azadi Sport Complex, P.O. Box 14665-1998, Tehran (Iran, Islamic Republic of); Rastegari, S.; Mirdamadi, S. [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Narmak, Tehran (Iran, Islamic Republic of)] [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Narmak, Tehran (Iran, Islamic Republic of); Alaei, M. [Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), West Blvd. Azadi Sport Complex, P.O. Box 14665-1998, Tehran (Iran, Islamic Republic of)] [Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), West Blvd. Azadi Sport Complex, P.O. Box 14665-1998, Tehran (Iran, Islamic Republic of)

    2011-05-15

    Research highlights: {yields} Synthesis of carbon nanotubes over Fe-Ni nanoparticles supported alloy 304L. {yields} Production of carbon nanotubes with high yield (700-1000%) and low cost catalyst. {yields} Optimum growth condition is CO/H{sub 2} = 1/1, 100 cm{sup 3}/min, at 620 {sup o}C under long term repetitive thermal cycling. {yields} Possibility of the mass production by metal dusting process with low cost. -- Abstract: Carbon nanotube materials were synthesized over Fe-Ni nanoparticles generated during disintegration of the surface of alloy 304L under metal dusting environment. The metal dusting condition was simulated and optimized through exposing stainless steel samples during long term repetitive thermal cycling in CO/H{sub 2} = 1/1, total gas flow rate 100 cm{sup 3}/min, at 620 {sup o}C for 300 h. After reaction, surface morphology of the samples and also carbonaceous deposition which had grown on sample surfaces were examined by stereoscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results revealed that multi-wall carbon nanotubes could be formed over nanocatalyst generated on the alloy surface by exploiting metal dusting process. By optimization of reaction parameters the yields of carbon nanotube materials obtained were 700-1000%. Also it has been shown herein that the amount of carbon nanotube materials remarkably increases when the reaction time is extended up to 300 h, indicating a possibility of the mass production by this easy method.

  2. Analogy between glass rheology and crystal plasticity: yielding at high strain rate

    E-Print Network [OSTI]

    Yildiz, Bilge

    Analogy between glass rheology and crystal plasticity: yielding at high strain rate Yue Fan arising from avalanche dynamics.10 View from crystal plasticity The experimental evidence of up fluctuation to stress activated processes. For crystals this behavior has been recently explained using

  3. High Yield Silicon Photonic Crystal Microcavity Biosensors with 100fM Detection Limit

    E-Print Network [OSTI]

    Chen, Ray

    High Yield Silicon Photonic Crystal Microcavity Biosensors with 100fM Detection Limit Yi Zou a silicon photonic crystal (PC) microcavity biosensor with 50 femto-molar detection limit. Our devices have, photonic crystal microcavity, biosensor, sub-wavelength grating coupler. *yzou@utexas.edu, swapnajit

  4. Gram-scale, high-yield synthesis of a robust metalorganic framework for storing methane and

    E-Print Network [OSTI]

    with compressed natural gas tanks (CNG) used in vehicles today, when the latter are pressurized to 248 bar (3600% of the deliverable capacity of a CNG tank that starts at 248 bar. (For crystalline granules or powders, particle-pressure CNG.) This material was synthesized in high yield on a gram-scale in a single- batch synthesis

  5. Evaluation of catalysts and membranes for high yield biohydrogen production via electrohydrogenesis in

    E-Print Network [OSTI]

    Evaluation of catalysts and membranes for high yield biohydrogen production via electrohydrogenesis Park, PA 16802, USA E-mail: blogan@psu.edu Hydrogen gas can be produced from fermentation end products is improved for producing H2 gas in MECs using AEMs. Key words | BEAMR, biohydrogen, bioreactors, catalysts

  6. PoS(Nufact08)090 High Yield Production of 6

    E-Print Network [OSTI]

    McDonald, Kirk

    PoS(Nufact08)090 High Yield Production of 6 He and 8 Li RIB for Astrophysics and Neutrino Physics@soreq.gov.il Francois de Oliveira Ganil, Caen, France E-mail: oliveira@ganil.fr A production scheme by fast secondary neutrons from a 40 MeV deuteron beam impinging on a converter target provides efficient production

  7. Target design for high fusion yield with the double Z-pinch-driven hohlraum

    SciTech Connect (OSTI)

    Vesey, R. A.; Herrmann, M. C.; Lemke, R. W.; Desjarlais, M. P.; Cuneo, M. E.; Stygar, W. A.; Bennett, G. R.; Campbell, R. B.; Christenson, P. J.; Mehlhorn, T. A.; Porter, J. L.; Slutz, S. A. [Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186 (United States)

    2007-05-15

    A key demonstration on the path to inertial fusion energy is the achievement of high fusion yield (hundreds of MJ) and high target gain. Toward this goal, an indirect-drive high-yield inertial confinement fusion (ICF) target involving two Z-pinch x-ray sources heating a central secondary hohlraum is described by Hammer et al. [Phys. Plasmas 6, 2129 (1999)]. In subsequent research at Sandia National Laboratories, theoretical/computational models have been developed and an extensive series of validation experiments have been performed to study hohlraum energetics, capsule coupling, and capsule implosion symmetry for this system. These models have been used to design a high-yield Z-pinch-driven ICF target that incorporates the latest experience in capsule design, hohlraum symmetry control, and x-ray production by Z pinches. An x-ray energy output of 9 MJ per pinch, suitably pulse-shaped, is sufficient for this concept to drive 0.3-0.5 GJ capsules. For the first time, integrated two-dimensional (2D) hohlraum/capsule radiation-hydrodynamics simulations have demonstrated adequate hohlraum coupling, time-dependent radiation symmetry control, and the successful implosion, ignition, and burn of a high-yield capsule in the double Z-pinch hohlraum. An important new feature of this target design is mode-selective symmetry control: the use of burn-through shields offset from the capsule that selectively tune certain low-order asymmetry modes (P{sub 2},P{sub 4}) without significantly perturbing higher-order modes and without a significant energy penalty. This paper will describe the capsule and hohlraum design that have produced 0.4-0.5 GJ yields in 2D simulations, provide a preliminary estimate of the Z-pinch load and accelerator requirements necessary to drive the system, and suggest future directions for target design work.

  8. RADIATION CHEMISTRY OF HIGH ENERGY CARBON, NEON AND ARGON IONS: INTEGRAL YIELDS FROM FERROUS SULFATE SOLUTIONS

    E-Print Network [OSTI]

    Christman, E.A.

    2010-01-01

    NEON AND ARGON IONS: INTEGRAL YIELDS FROM FERROUS SULFATENEON AND ARGON IONS: INTEGRAL YIELDS FROM FERROUS SULFATE

  9. Thin scintillating tiles (with fiber readout and high light-yield) for the OPAL endcaps

    SciTech Connect (OSTI)

    Ball, Austin H.

    1998-11-09

    Scintillating tiles with embedded wavelength-shifting fiber readout have recently been installed in the OPAL endcaps to improve trigger performance, time resolution and hermeticity for experiments at LEP II. The design is constrained to provide hermetic coverage of the available area with high single particle efficiency, uniform response and good time resolution, notwithstanding the limited space for the detector and its long readout cables, and despite the strong endcap magnetic field. A high light yield per embedded fiber is required. This paper motivates and describes the design, and demonstrates that the performance meets the required targets. A light yield of 14 photoelectrons/MIP and a time resolution of 3ns have been obtained during 1997 LEP operation.

  10. Thin scintillating tiles (with fiber readout and high light-yield) for the OPAL endcaps

    SciTech Connect (OSTI)

    Ball, A.H.

    1998-11-01

    Scintillating tiles with embedded wavelength-shifting fiber readout have recently been installed in the OPAL endcaps to improve trigger performance, time resolution and hermeticity for experiments at LEP II. The design is constrained to provide hermetic coverage of the available area with high single particle efficiency, uniform response and good time resolution, notwithstanding the limited space for the detector and its long readout cables, and despite the strong endcap magnetic field. A high light yield per embedded fiber is required. This paper motivates and describes the design, and demonstrates that the performance meets the required targets. A light yield of 14 photoelectrons/MIP and a time resolution of 3ns have been obtained during 1997 LEP operation. {copyright} {ital 1998 American Institute of Physics.}

  11. High-Yield Hybrid Cellulosic Ethanol Process Using High-Impact Feedstock

    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 Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancingR Walls - Building America Topa High BindingVoltage||Andrewa

  12. OPERATIONAL CHALLENGES IN MIXING AND TRANSFER OF HIGH YIELD STRESS SLUDGE WASTE

    SciTech Connect (OSTI)

    Caldwell, T.; Bhatt, P.

    2009-12-07

    The ability to mobilize and transport non-Newtonian waste is essential to advance the closure of highly radioactive storage tanks. Recent waste removal operations from Tank 12H at the Savannah River Site (SRS) encountered sludge mixtures with a yield stress too high to pump. The waste removal equipment for Tank 12H was designed to mobilize and transport a diluted slurry mixture through an underground 550m long (1800 ft) 0.075m diameter (3 inch) pipeline. The transfer pump was positioned in a well casing submerged in the sludge slurry. The design allowed for mobilized sludge to enter the pump suction while keeping out larger tank debris. Data from a similar tank with known rheological properties were used to size the equipment. However, after installation and startup, field data from Tank 12H confirmed the yield stress of the slurry to exceed 40 Pa, whereas the system is designed for 10 Pa. A revision to the removal strategy was required, which involved metered dilution, blending, and mixing to ensure effective and safe transfer performance. The strategy resulted in the removal of over 255,000 kgs of insoluble solids with four discrete transfer evolutions for a total transfer volume of 2400 m{sup 3} (634,000 gallons) of sludge slurry.

  13. Reaching High-Yield Fusion with a Slow Plasma Liner Compressing a Magnetized Target

    SciTech Connect (OSTI)

    Ryutov, D D; Parks, P B

    2008-03-18

    Dynamics of the compression of a magnetized plasma target by a heavy liner made of partially ionized high high-Z material is discussed. A 'soft-landing' (shockless) mode of the liner deceleration is analyzed. Conclusion is drawn that such mode is possible for the liners whose thickness at the time of the first contact with the target is smaller than, roughly, 10% of the initial (un-compressed) target radius. A combination of the plasma liner with one or two glide cones allows for a direct access to the area near the center of the reactor chamber. One can then generate plasma target inside the plasma liner at the optimum time. The other advantage of the glide cones is that they can be used to deliver additional fuel to the center of the target near the point of a maximum compression and thereby increase the fusion yield.

  14. High liquid yield process for retorting various organic materials including oil shale

    DOE Patents [OSTI]

    Coburn, Thomas T. (Livermore, CA)

    1990-01-01

    This invention is a continuous retorting process for various high molecular weight organic materials, including oil shale, that yields an enhanced output of liquid product. The organic material, mineral matter, and an acidic catalyst, that appreciably adsorbs alkenes on surface sites at prescribed temperatures, are mixed and introduced into a pyrolyzer. A circulating stream of olefin enriched pyrolysis gas is continuously swept through the organic material and catalyst, whereupon, as the result of pyrolysis, the enhanced liquid product output is provided. Mixed spent organic material, mineral matter, and cool catalyst are continuously withdrawn from the pyrolyzer. Combustion of the spent organic material and mineral matter serves to reheat the catalyst. Olefin depleted pyrolysis gas, from the pyrolyzer, is enriched in olefins and recycled into the pyrolyzer. The reheated acidic catalyst is separated from the mineral matter and again mixed with fresh organic material, to maintain the continuously cyclic process.

  15. A high liquid yield process for retorting various organic materials including oil shale

    DOE Patents [OSTI]

    Coburn, T.T.

    1988-07-26

    This invention is a continuous retorting process for various high molecular weight organic materials, including oil shale, that yields an enhanced output of liquid product. The organic material, mineral matter, and an acidic catalyst, that appreciably adsorbs alkenes on surface sites at prescribed temperatures, are mixed and introduced into a pyrolyzer. A circulating stream of olefin enriched pyrolysis gas is continuously swept through the organic material and catalyst, whereupon, as the result of pyrolysis, the enhanced liquid product output is provided. Mixed spent organic material, mineral matter, and cool catalyst are continuously withdrawn from the pyrolyzer. Combustion of the spent organic material and mineral matter serves to reheat the catalyst. Olefin depleted pyrolysis gas, from the pyrolyzer, is enriched in olefins and recycled into the pyrolyzer. The reheated acidic catalyst is separated from the mineral matter and again mixed with fresh organic material, to maintain the continuously cyclic process. 2 figs.

  16. A nanoparticle bed micro-reactor with high syngas yield for moderate temperature micro-scale SOFC power plants

    E-Print Network [OSTI]

    Daraio, Chiara

    . c The micro-reactor is able to achieve higher syngas yield for n-butane and propane than state systems. It is shown that the presented micro-reactor is able to produce syngas (COþH2) efficiently from n-butane. The present micro-reactor is able to achieve syngas yield as high as 60% for n-butane and 50% for propane

  17. A Low-cost, High-yield Process for the Direct Productin of High Energy Density Liquid Fuel from Biomass

    SciTech Connect (OSTI)

    Agrawal, Rakesh

    2014-02-21

    The primary objective and outcome of this project was the development and validation of a novel, low-cost, high-pressure fast-hydropyrolysis/hydrodeoxygenation (HDO) process (H{sub 2}Bioil) using supplementary hydrogen (H{sub 2}) to produce liquid hydrocarbons from biomass. The research efforts under the various tasks of the project have culminated in the first experimental demonstration of the H2Bioil process, producing 100% deoxygenated >C4+ hydrocarbons containing 36-40% of the carbon in the feed of pyrolysis products from biomass. The demonstrated H{sub 2}Bioil process technology (i.e. reactor, catalyst, and downstream product recovery) is scalable to a commercial level and is estimated to be economically competitive for the cases when supplementary H{sub 2} is sourced from coal, natural gas, or nuclear. Additionally, energy systems modeling has revealed several process integration options based on the H{sub 2}Bioil process for energy and carbon efficient liquid fuel production. All project tasks and milestones were completed or exceeded. Novel, commercially-scalable, high-pressure reactors for both fast-hydropyrolysis and hydrodeoxygenation were constructed, completing Task A. These reactors were capable of operation under a wide-range of conditions; enabling process studies that lead to identification of optimum process conditions. Model compounds representing biomass pyrolysis products were studied, completing Task B. These studies were critical in identifying and developing HDO catalysts to target specific oxygen functional groups. These process and model compound catalyst studies enabled identification of catalysts that achieved 100% deoxygenation of the real biomass feedstock, sorghum, to form hydrocarbons in high yields as part of Task C. The work completed during this grant has identified and validated the novel and commercially scalable H2Bioil process for production of hydrocarbon fuels from biomass. Studies on model compounds as well as real biomass feedstocks were utilized to identify optimized process conditions and selective HDO catalyst for high yield production of hydrocarbons from biomass. In addition to these experimental efforts, in Tasks D and E, we have developed a mathematical optimization framework to identify carbon and energy efficient biomass-to-liquid fuel process designs that integrate the use of different primary energy sources along with biomass (e.g. solar, coal or natural gas) for liquid fuel production. Using this tool, we have identified augmented biomass-to-liquid fuel configurations based on the fast-hydropyrolysis/HDO pathway, which was experimentally studied in this project. The computational approach used for screening alternative process configurations represents a unique contribution to the field of biomass processing for liquid fuel production.

  18. MULTI-KEV X-RAY YIELDS FROM HIGH-Z GAS TARGETS FIELDED AT OMEGA

    SciTech Connect (OSTI)

    Kane, J O; Fournier, K B; May, M J; Colvin, J D; Thomas, C A; Marrs, R E; Compton, S M; Moody, J D; Bond, E J; Davis, J F

    2010-11-04

    The authors report on modeling of x-ray yield from gas-filled targets shot at the OMEGA laser facility. The OMEGA targets were 1.8 mm long, 1.95 mm in diameter Be cans filled with either a 50:50 Ar:Xe mixture, pure Ar, pure Kr or pure Xe at {approx} 1 atm. The OMEGA experiments heated the gas with 20 kJ of 3{omega} ({approx} 350 nm) laser energy delivered in a 1 ns square pulse. the emitted x-ray flux was monitored with the x-ray diode based DANTE instruments in the sub-keV range. Two-dimensional x-ray images (for energies 3-5 keV) of the targets were recorded with gated x-ray detectors. The x-ray spectra were recorded with the HENWAY crystal spectrometer at OMEGA. Predictions are 2D r-z cylindrical with DCA NLTE atomic physics. Models generally: (1) underpredict the Xe L-shell yields; (2) overpredict the Ar K-shell yields; (3) correctly predict the Xe thermal yields; and (4) greatly underpredict the Ar thermal yields. However, there are spreads within the data, e.g. the DMX Ar K-shell yields are correctly predicted. The predicted thermal yields show strong angular dependence.

  19. Advanced Detector Research - Fabrication and Testing of 3D Active-Edge Silicon Sensors: High Speed, High Yield

    SciTech Connect (OSTI)

    Parker, Sherwood I

    2008-09-01

    Development of 3D silicon radiation sensors employing electrodes fabricated perpendicular to the sensor surfaces to improve fabrication yields and increasing pulse speeds.

  20. A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator

    E-Print Network [OSTI]

    Waldmann, Ole

    2011-01-01

    densities, high atomic fractions, and high power e?cienciesa high atomic species fraction at signi?cantly lower power

  1. Characteristics of tropical cyclones in high-resolution models in the present climate

    SciTech Connect (OSTI)

    Shaevitz, Daniel A.; Camargo, Suzana J.; Sobel, Adam H.; Jonas, Jeffrey A.; Kim, Daehyun; Kumar, Arun; Lim, Young -Kwon; Reed, Kevin A.; Roberts, Malcolm J.; Scoccimarro, Enrico; Vidale, Pier Luigi; Wang, Hui; Zhao, Ming; Henderson, Naomi

    2014-12-05

    The global characteristics of tropical cyclones (TCs) simulated by several climate models are analyzed and compared with observations. The global climate models were forced by the same sea surface temperature (SST) fields in two types of experiments, using climatological SST and interannually varying SST. TC tracks and intensities are derived from each model's output fields by the group who ran that model, using their own preferred tracking scheme; the study considers the combination of model and tracking scheme as a single modeling system, and compares the properties derived from the different systems. Overall, the observed geographic distribution of global TC frequency was reasonably well reproduced. As expected, with the exception of one model, intensities of the simulated TC were lower than in observations, to a degree that varies considerably across models.

  2. Characteristics of tropical cyclones in high-resolution models in the present climate

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

    Shaevitz, Daniel A.; Camargo, Suzana J.; Sobel, Adam H.; Jonas, Jeffrey A.; Kim, Daehyun; Kumar, Arun; LaRow, Timothy E.; Lim, Young -Kwon; Murakami, Hiroyuki; Reed, Kevin A.; et al

    2014-12-05

    The global characteristics of tropical cyclones (TCs) simulated by several climate models are analyzed and compared with observations. The global climate models were forced by the same sea surface temperature (SST) fields in two types of experiments, using climatological SST and interannually varying SST. TC tracks and intensities are derived from each model's output fields by the group who ran that model, using their own preferred tracking scheme; the study considers the combination of model and tracking scheme as a single modeling system, and compares the properties derived from the different systems. Overall, the observed geographic distribution of global TCmore »frequency was reasonably well reproduced. As expected, with the exception of one model, intensities of the simulated TC were lower than in observations, to a degree that varies considerably across models.« less

  3. High-Yield Synthesis and Purification of an -Helical Transmembrane Domain

    E-Print Network [OSTI]

    by this small-scale 9-fluorenylme- thoxycarbonyl (Fmoc) strategy is comparable to that of the peptide. Combining these approaches readily yields 10 to 20 mg of pure transmembrane peptide from a small-scale Fmoc be studied. In addition, the necessary use of hydro- fluoric acid to cleave the peptides from the resin

  4. A High-Yield Synthesis of Chalcopyrite CuIn S 2 Nanoparticles with Exceptional Size Control

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

    Sun, Chivin; Gardner, Joseph S.; Shurdha, Endrit; Margulieux, Kelsey R.; Westover, Richard D.; Lau, Lisa; Long, Gary; Bajracharya, Cyril; Wang, Chongmin; Thurber, Aaron; et al

    2009-01-01

    We report high-yield and efficient size-controlled syntheses of Chalcopyrite CuIn S 2 nanoparticles by decomposing molecular single source precursors (SSPs) via microwave irradiation in the presence of 1,2-ethanedithiol at reaction temperatures as low as 100 ° C and times as short as 30?minutes. The nanoparticles sizes were 1.8?nm to 10.8?nm as reaction temperatures were varied from 100 ° C to 200 ° C with the bandgaps from 2.71?eV to 1.28?eV with good size control and high yields (64%–95%). The resulting nanoparticles were analyzed by XRD, UV-Vis, ICP-OES, XPS, SEM, EDS, and HRTEM. Titrationmore »studies by 1 H NMR using SSP 1 with 1,2-ethanedithiol and benzyl mercaptan were conducted to elucidate the formation of Chalcopyrite CuIn S 2 nanoparticles. « less

  5. A High-Yield Synthesis of Chalcopyrite CuInS2Nanoparticles with Exceptional Size Control

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

    Sun, Chivin; Gardner, Joseph S.; Shurdha, Endrit; Margulieux, Kelsey R.; Westover, Richard D.; Lau, Lisa; Long, Gary; Bajracharya, Cyril; Wang, Chongmin; Thurber, Aaron; et al

    2009-01-01

    We report high-yield and efficient size-controlled syntheses of Chalcopyrite CuInS2nanoparticles by decomposing molecular single source precursors (SSPs) via microwave irradiation in the presence of 1,2-ethanedithiol at reaction temperatures as low as 100°C and times as short as 30?minutes. The nanoparticles sizes were 1.8?nm to 10.8?nm as reaction temperatures were varied from 100°C to 200°C with the bandgaps from 2.71?eV to 1.28?eV with good size control and high yields (64%–95%). The resulting nanoparticles were analyzed by XRD, UV-Vis, ICP-OES, XPS, SEM, EDS, and HRTEM. Titration studies by1H NMR using SSP1with 1,2-ethanedithiol and benzyl mercaptan were conducted to elucidate the formation ofmore »Chalcopyrite CuInS2nanoparticles.« less

  6. A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator

    E-Print Network [OSTI]

    Waldmann, Ole

    2011-01-01

    A Permanent-Magnet Microwave Ion Source for a Compact High-A Permanent-Magnet Microwave Ion Source for a Compact High-on the development of a microwave ion source that will be

  7. Design of a High Intensity Neutron Source for Neutron-Induced Fission Yield Studies

    E-Print Network [OSTI]

    M. Lantz; D. Gorelov; A. Jokinen; V. S. Kolhinen; A. Mattera; H. Penttilä; S. Pomp; V. Rakopoulos; S. Rinta-Antila; A. Solders

    2013-04-09

    The upgraded IGISOL facility with JYFLTRAP, at the accelerator laboratory of the University of Jyv\\"askyl\\"a, has been supplied with a new cyclotron which will provide protons of the order of 100 {\\mu}A with up to 30 MeV energy, or deuterons with half the energy and intensity. This makes it an ideal place for measurements of neutron-induced fission products from various actinides, in view of proposed future nuclear fuel cycles. The groups at Uppsala University and University of Jyv\\"askyl\\"a are working on the design of a neutron converter that will be used as neutron source in fission yield studies. The design is based on simulations with Monte Carlo codes and a benchmark measurement that was recently performed at The Svedberg Laboratory in Uppsala. In order to obtain a competitive count rate the fission targets will be placed very close to the neutron converter. The goal is to have a flexible design that will enable the use of neutron fields with different energy distributions. In the present paper, some considerations for the design of the neutron converter will be discussed, together with different scenarios for which fission targets and neutron energies to focus on.

  8. High-Yielding Method for Converting Biomass to Fermentable Sugars for

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHigh energy neutronHigh-Pressure MOFElectricityBiofuel Production

  9. High-Yield Feedstock and Biomass Conversion Technology for Renewable Energy and Economic Development

    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 Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancingR Walls - Building America Topa High BindingVoltage||Andrew

  10. Strain-tunable entangled-light-emitting diodes with high yield and fast operation speed

    E-Print Network [OSTI]

    Jiaxiang Zhang; Johannes S. Wildmann; Fei Ding; Rinaldo Trotta; Yongheng Huo; Eugenio Zallo; Daniel Huber; Armando Rastelli; Oliver G. Schmidt

    2015-05-12

    Triggered sources of entangled photons play crucial roles in almost any existing protocol of quantum information science. The possibility to generate these non-classical states of light with high speed and using electrical pulses could revolutionize the field. Entangled-light-emitting-diodes (ELEDs) based on semiconductor quantum dots (QDs) are at present the only devices that can address this task 5. However, ELEDs are plagued by a source of randomness that hampers their practical exploitation in the foreseen applications: the very low probability (~10-2) of finding QDs with sufficiently small fine-structure-splitting for entangled-photon-generation. Here, we overcome this hurdle by introducing the first strain-tunable ELEDs (S-ELEDs) that exploit piezoelectric-induced strains to tune QDs for entangled-photon-generation. We demonstrate that up to 30% of the QDs in S-ELEDs emit polarization-entangled photon pairs with entanglement-fidelities as high as f+ = 0.83(5). Driven at the highest operation speed of 400 MHz ever reported so far, S-ELEDs emerge as unique devices for high-data rate entangled-photon applications.

  11. Gram-scale, high-yield synthesis of a robust metal-organic framework for storing methane and other gases

    SciTech Connect (OSTI)

    Wilmer, CE; Farha, OK; Yildirim, T; Eryazici, I; Krungleviciute, V; Sarjeant, AA; Snurr, RQ; Hupp, JT

    2013-04-01

    We have synthesized and characterized a new metal-organic framework (MOF) material, NU-125, that, in the single-crystal limit, achieves a methane storage density at 58 bar (840 psi) and 298 K corresponding to 86% of that obtained with compressed natural gas tanks (CNG) used in vehicles today, when the latter are pressurized to 248 bar (3600 psi). More importantly, the deliverable capacity (58 bar to 5.8 bar) for NU-125 is 67% of the deliverable capacity of a CNG tank that starts at 248 bar. (For crystalline granules or powders, particle packing inefficiencies will yield densities and deliverable capacities lower than 86% and 67% of high-pressure CNG.) This material was synthesized in high yield on a gram-scale in a single-batch synthesis. Methane adsorption isotherms were measured over a wide pressure range (0.1-58 bar) and repeated over twelve cycles on the same sample, which showed no detectable degradation. Adsorption of CO2 and H-2 over a broad range of pressures and temperatures are also reported and agree with our computational findings.

  12. Recent glaciation at high elevations on Arsia Mons, Mars: Implications for the formation and evolution of large tropical

    E-Print Network [OSTI]

    Marchant, David R.

    and evolution of large tropical mountain glaciers David E. Shean,1,2 James W. Head III,1 James L. Fastook,3 and David R. Marchant4 Received 31 May 2006; revised 24 August 2006; accepted 26 October 2006; published 21 et al., 2003a; Chuang and Crown, 2005], concentric crater fill [Squyres and Carr, 1986; Carr, 1996

  13. Peanut Profits and Irrigation Yield Response in the Northern Texas High Plains, A Non-Traditional Production Area. 

    E-Print Network [OSTI]

    Harman, Wyatte L.; Regier, C.; Petr, F.; Lansford, V.D.

    1990-01-01

    of irrigation. Knowledge of the most profitable timings of applica tions rela tive to physiologi cal development and yield response is important also for efficient use of water resources. Thus, the objectives of this research were to (1) assess peanut yield... development (Stansell and Pallas,. 1985; An, 1978; Reddi and Reddy, 1977). Furthermore, excessive late season irrigations or rain fall, especially on heavier soils, can decrease yields (Mantell and Goldin, 1964). Peg attachments may be weakened...

  14. Modeling Cotton and Winter Wheat Growth and Yield Responses to Irrigation Management in the Texas High Plains and Rolling Plains 

    E-Print Network [OSTI]

    Attia Mohamed, Ahmed

    2014-12-17

    were negatively correlated. A modeling study was performed using the cotton growth simulation model, Cotton2K, to investigate the lint yield, WUE, and economic return responses using 31 years weather records (1980 – 2010) from the Texas Rolling Plains...

  15. A High-Yield, Liquid-Phase Approach for the Partial Oxidation of Methane to Methanol using SO3 as the Oxidant

    E-Print Network [OSTI]

    Bell, Alexis T.

    A High-Yield, Liquid-Phase Approach for the Partial Oxidation of Methane to Methanol using SO3 approach for producing methanol from methane in a three-step, liquid phase process is reported is hydrolyzed in the presence of an organic solvent, to produce an organic phase con- taining methanol

  16. int. j. radiat. biol 2001, vol. 77, no. 2, 155 164 DNA strand break yields after post-high LET irradiation

    E-Print Network [OSTI]

    irradiation incubation with endonuclease-III and evidence for hydroxyl radical clustering J. R. MILLIGAN*, J (DSB) yields after post-high LET irradiation incuba- conditions (Nikjoo et al. 1999), the conclusion DNA in aerobic aqueous solution was irradiated with one of ve radiation types: 137 Cs c-rays (LET

  17. Advanced Coating Technologies and Processes --The development of low-cost high-yield coating technologies is one of the most important ingredients for

    E-Print Network [OSTI]

    Post, Wilfred M.

    #12;Advanced Coating Technologies and Processes -- The development of low-cost high-yield coating the reliability of batteries. ORNL's research on wet and dry coating technologies could reduce the time and energy techniques to fuse amorphous iron-based powders into ultrahard nanocomposite coatings many times harder than

  18. Mapping intra-field yield variation using high resolution satellite imagery to integrate bioenergy and environmental stewardship in an agricultural watershed

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

    Hamada, Yuki; Ssegane, Herbert; Negri, Maria Cristina

    2015-07-31

    Biofuels are important alternatives for meeting our future energy needs. Successful bioenergy crop production requires maintaining environmental sustainability and minimum impacts on current net annual food, feed, and fiber production. The objectives of this study were to: (1) determine under-productive areas within an agricultural field in a watershed using a single date; high resolution remote sensing and (2) examine impacts of growing bioenergy crops in the under-productive areas using hydrologic modeling in order to facilitate sustainable landscape design. Normalized difference indices (NDIs) were computed based on the ratio of all possible two-band combinations using the RapidEye and the National Agriculturalmore »Imagery Program images collected in summer 2011. A multiple regression analysis was performed using 10 NDIs and five RapidEye spectral bands. The regression analysis suggested that the red and near infrared bands and NDI using red-edge and near infrared that is known as the red-edge normalized difference vegetation index (RENDVI) had the highest correlation (R2 = 0.524) with the reference yield. Although predictive yield map showed striking similarity to the reference yield map, the model had modest correlation; thus, further research is needed to improve predictive capability for absolute yields. Forecasted impact using the Soil and Water Assessment Tool model of growing switchgrass (Panicum virgatum) on under-productive areas based on corn yield thresholds of 3.1, 4.7, and 6.3 Mg·ha-1 showed reduction of tile NO3-N and sediment exports by 15.9%–25.9% and 25%–39%, respectively. Corresponding reductions in water yields ranged from 0.9% to 2.5%. While further research is warranted, the study demonstrated the integration of remote sensing and hydrologic modeling to quantify the multifunctional value of projected future landscape patterns in a context of sustainable bioenergy crop production.« less

  19. Chemical composition of biomass from tall perennial tropical grasses

    SciTech Connect (OSTI)

    Prine, G.M.; Stricker, J.A.; Anderson, D.L.

    1995-11-01

    The tall perennial tropical grasses, elephantgrass (Pennisetum purpureum Schum.), sugarcane and energycane (Saccharum sp.) and erianthus (Erianthus arundenaceum (Retz) Jesw.) have given very high oven dry biomass yields in Florida and the warm Lower South USA. No good complete analyses of the chemical composition of these grasses for planning potential energy use was available. We sampled treatments of several tall grass demonstrations and experiments containing high-biomass yielding genotypes of the above tall grass crops at several locations in Florida over the two growing seasons, 1992 and 1993. These samples were analyzed for crude protein, NDF, ADF, cellulose, hemicellulose, lignin, and IVDMD or IVOMD. The analysis for the above constituents are reported, along with biomass yields where available, for the tall grass accessions in the various demonstrations and experiments. Particular attention is given to values obtained from the high-yielding tall grasses grown on phosphatic clays in Polk County, FL, the area targeted by a NREL grant to help commercialize bioenergy use from these crops.

  20. The Microwave Air Yield Beam Experiment (MAYBE): measurement of GHz radiation for Ultra-High Energy Cosmic Rays detection

    E-Print Network [OSTI]

    M. Monasor; M. Bohacova; C. Bonifazi; G. Cataldi; S. Chemerisov; J. R. T. De Mello Neto; P. Facal San Luis; B. Fox; P. W. Gorham; C. Hojvat; N. Hollon; R. Meyhandan; L. C. Reyes; B. Rouille D'Orfeuil; E. M. Santos; J. Pochez; P. Privitera; H. Spinka; V. Verzi; C. Williams; J. Zhou

    2011-08-31

    We present first measurements by MAYBE of microwave emission from an electron beam induced air plasma, performed at the electron Van de Graaff facility of the Argonne National Laboratory. Coherent radio Cherenkov, a major background in a previous beam experiment, is not produced by the 3 MeV beam, which simplifies the interpretation of the data. Radio emission is studied over a wide range of frequencies between 3 and 12 GHz. This measurement provides further insight on microwave emission from extensive air showers as a novel detection technique for Ultra-High Energy Cosmic Rays.

  1. CHARACTERIZATION OF CLOUDS IN TITAN'S TROPICAL ATMOSPHERE

    SciTech Connect (OSTI)

    Griffith, Caitlin A.; Penteado, Paulo; Rodriguez, Sebastien; Baines, Kevin H.; Buratti, Bonnie; Sotin, Christophe; Clark, Roger; Nicholson, Phil; Jaumann, Ralf

    2009-09-10

    Images of Titan's clouds, possible over the past 10 years, indicate primarily discrete convective methane clouds near the south and north poles and an immense stratiform cloud, likely composed of ethane, around the north pole. Here we present spectral images from Cassini's Visual Mapping Infrared Spectrometer that reveal the increasing presence of clouds in Titan's tropical atmosphere. Radiative transfer analyses indicate similarities between summer polar and tropical methane clouds. Like their southern counterparts, tropical clouds consist of particles exceeding 5 {mu}m. They display discrete structures suggestive of convective cumuli. They prevail at a specific latitude band between 8 deg. - 20 deg. S, indicative of a circulation origin and the beginning of a circulation turnover. Yet, unlike the high latitude clouds that often reach 45 km altitude, these discrete tropical clouds, so far, remain capped to altitudes below 26 km. Such low convective clouds are consistent with the highly stable atmospheric conditions measured at the Huygens landing site. Their characteristics suggest that Titan's tropical atmosphere has a dry climate unlike the south polar atmosphere, and despite the numerous washes that carve the tropical landscape.

  2. Climate and the Tropical Atlantic

    E-Print Network [OSTI]

    Climate and the Tropical Atlantic Presenter: Rick Lumpkin AOML Program Review 4-6 March 2014 What drives Tropical Atlantic climate changes and what are their impacts? #12;AOML Program Review2 Climate and the Tropical Atlantic Why this matters to NOAA and to society: Climate variability in the Tropical Atlantic

  3. Measurement of scintillation and ionization yield with high-pressure gaseous mixtures of Xe and TMA for improved neutrinoless double beta decay and dark matter searches

    E-Print Network [OSTI]

    Nakajima, Y; Matis, H S; Nygren, D; Oliveira, C; Renner, J

    2015-01-01

    Liquid Xe TPCs are among the most popular choices for double beta decay and WIMP dark matter searches. Gaseous Xe has intrinsic advantages when compared to Liquid Xe, specifically, tracking capability and better energy resolution for double beta decay searches. The performance of gaseous Xe can be further improved by molecular additives such as trimethylamine(TMA), which are expected to (1) cool down the ionization electrons, (2) convert Xe excitation energy to TMA ionizations through Penning transfer, and (3) produce scintillation and electroluminescence light in a more easily detectable wavelength (300 nm). These features may provide better tracking and energy resolution for double-beta decay searches. They are also expected to enhance columnar recombination for nuclear recoils, which can be used for searches for WIMP dark matter with directional sensitivity. We constructed a test ionization chamber and successfully measured scintillation and ionization yields at high precision with various Xe and TMA mixtu...

  4. CIGUATERA: TROPICAL FISH POISONING

    E-Print Network [OSTI]

    CIGUATERA: TROPICAL FISH POISONING Marine Biological I · ·' iw« L I B R >*· ** Y JUL 3 -1350 WOODS POISONING By William Arcisz, Bacteriologist, Formerly with the Fishery Research Laboratory Branch in which Fish Poisoning is Prevalento........... 3 Symptoms of Ciguatera ...... 00

  5. Commercial Building HVAC Energy Usage in Semi-Tropical Climates 

    E-Print Network [OSTI]

    Worbs, H. E.

    1987-01-01

    . Another consideration is the high ventilation loads due to cooling the moist air prevalent in semi-tropical climates. This paper describes a computer program which assesses all the pertinent variables which comprise the annual heating and cooling energy...

  6. Layer inflow into precipitating convection over the western tropical Pacific

    E-Print Network [OSTI]

    Mechem, David B.; Houze, Robert A. Jr.; Chen, Shuyi S.

    2002-07-01

    A conceptual model of tropical convection frequently used in convective parametrization schemes is that of a parcel process in which boundary-layer air, characterized by high equivalent potential temperature, ascends to ...

  7. Interval eigenproblem in tropical and fuzzy algebra Tolerance eigenproblem in tropical algebra

    E-Print Network [OSTI]

    Mitchener, Paul

    Interval eigenproblem in tropical and fuzzy algebra Tolerance eigenproblem in tropical algebra Tolerance eigenproblem in fuzzy algebra Tolerance interval eigenvectors in tropical and fuzzy algebra Martin Workshop Birmingham, May 16, 2013 #12;Interval eigenproblem in tropical and fuzzy algebra Tolerance

  8. Yield Improvement in Steel Casting (Yield II)

    SciTech Connect (OSTI)

    Richard A. Hardin; Christoph Beckermann; Tim Hays

    2002-02-18

    This report presents work conducted on the following main projects tasks undertaken in the Yield Improvement in Steel Casting research program: Improvement of Conventional Feeding and Risering Methods, Use of Unconventional Yield Improvement Techniques, and Case Studies in Yield Improvement. Casting trials were conducted and then simulated using the precise casting conditions as recorded by the participating SFSA foundries. These results present a statistically meaningful set of experimental data on soundness versus feeding length. Comparisons between these casting trials and casting trials performed more than forty years ago by Pellini and the SFSA are quite good and appear reasonable. Comparisons between the current SFSA feeding rules and feeding rules based on the minimum Niyama criterion reveal that the Niyama-based rules are generally less conservative. The niyama-based rules also agree better with both the trials presented here, and the casting trails performed by Pellini an d the SFSA years ago. Furthermore, the use of the Niyama criterion to predict centerline shrinkage for horizontally fed plate sections has a theoretical basis according to the casting literature reviewed here. These results strongly support the use of improved feeding rules for horizontal plate sections based on the Niyama criterion, which can be tailored to the casting conditions for a given alloy and to a desired level of soundness. The reliability and repeatability of ASTM shrinkage x-ray ratings was investigated in a statistical study performed on 128 x-rays, each of which were rated seven different times. A manual ''Feeding and Risering Guidelines for Steel Castings' is given in this final report. Results of casting trials performed to test unconventional techniques for improving casting yield are presented. These use a stacked arrangement of castings and riser pressurization to increase the casting yield. Riser pressurization was demonstrated to feed a casting up to four time s the distance of a non-pressurized riser, and can increase casting yield by decreasing the required number of risers. All case studies for this projects were completed and compiled into an SFSA Technical Report that is submitted part of this Final Report

  9. Geography 102, Spring 2007 Tropical Climatology

    E-Print Network [OSTI]

    Office: Bunche Hall 1176 Phone: 206-4590/825-1071, email:raphael@geog.ucla.edu Office Hours: M/W 10:30p the development of Tropical Cli- mates - the laws that govern the movement of air; solar radiation in the Tropics in the Tropics - the Hadley Cells, the Trade Winds, the InterTropical Convergence Zone, the Tropical ocean

  10. Acid soil infertility effects on peanut yields and yield components

    SciTech Connect (OSTI)

    Blamey, F.P.C.

    1983-01-01

    The interpretation of soil amelioration experiments with peanuts is made difficult by the unpredictibility of the crop and by the many factors altered when ameliorating acid soils. The present study was conducted to investigate the effects of lime and gypsum applications on peanut kernel yield via the three first order yield components, pods per ha, kernels per pod, and kernel mass. On an acid medium sandy loam soil (typic Plinthustult), liming resulted in a highly significant kernel yield increase of 117% whereas gypsum applications were of no significant benefit. As indicated by path coefficient analysis, an increase in the number of pods per ha was markedly more important in increasing yield than an increase in either the number of kernels per pod or kernel mass. Furthermore, exch. Al was found to be particularly detrimental to pod number. It was postulated that poor peanut yields resulting from acid soil infertility were mainly due to the depressive effect of exch. Al on pod number. Exch. Ca appeared to play a secondary role by ameliorating the adverse effects of exch. Al.

  11. The Air-Fluorescence Yield

    E-Print Network [OSTI]

    F. Arqueros; F. Blanco; D. Garcia-Pinto; M. Ortiz; J. Rosado

    2008-07-30

    Detection of the air-fluorescence radiation induced by the charged particles of extensive air showers is a well-established technique for the study of ultra-high energy cosmic rays. Fluorescence telescopes provide a nearly calorimetric measure of the primary energy. Presently the main source of systematic uncertainties comes from our limited accuracy in the fluorescence yield, that is, the number of fluorescence photons emitted per unit of energy deposited in the atmosphere by the shower particles. In this paper the current status of our knowledge on the fluorescence yield both experimental an theoretical will be discussed.

  12. The Role of Wave Energy Accumulation in Tropical Cyclogenesis over the Tropical North Atlantic

    E-Print Network [OSTI]

    Webster, Peter J.

    The Role of Wave Energy Accumulation in Tropical Cyclogenesis over the Tropical North Atlantic "wave energy"). Relative vorticity increases locally leading to an increase in the likelihood scales of interaction. The importance of wave energy accumulation for tropical cyclogenesis

  13. Tropical bases by regular projections

    E-Print Network [OSTI]

    Hept, Kerstin

    2007-01-01

    We consider the tropical variety $\\mathcal{T}(I)$ of a prime ideal $I$ generated by the polynomials $f_1, ..., f_r$ and revisit the regular projection technique introduced by Bieri and Groves from a computational point of view. In particular, we show that $I$ has a short tropical basis of cardinality at most $r + \\codim I + 1$ at the price of increased degrees, and we provide a computational description of these bases.

  14. United States and Caribbean tropical cyclone activity related to the solar cycle

    E-Print Network [OSTI]

    Elsner, James B.

    United States and Caribbean tropical cyclone activity related to the solar cycle J. B. Elsner1 related to solar activity. The relationship results from fewer intense tropical cyclones over the Caribbean and Gulf of Mexico when sunspot numbers are high. The finding is in accord with the heat- engine

  15. Significant Increase in Hydrogen Photoproduction Rates and Yields by Wild-Type Algae is Detected at High Photobioreactor Gas Phase Volume (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-07-01

    This NREL Hydrogen and Fuel Cell Technical Highlight describes how hydrogen photoproduction activity in algal cultures can be improved dramatically by increasing the gas-phase to liquid-phase volume ratio of the photobioreactor. NREL, in partnership with subcontractors from the Institute of Basic Biological Problems in Pushchino, Russia, demonstrated that the hydrogen photoproduction rate in algal cultures always decreases exponentially with increasing hydrogen partial pressure above the culture. The inhibitory effect of high hydrogen concentrations in the photobioreactor gas phase on hydrogen photoproduction by algae is significant and comparable to the effect observed with some anaerobic bacteria.

  16. POTENTIAL EFFECTS OF GLOBAL CLIMATIC CHANGE ON THE PHENOLOGY AND YIELD OF MAIZE IN VENEZUELA *

    E-Print Network [OSTI]

    Robock, Alan

    POTENTIAL EFFECTS OF GLOBAL CLIMATIC CHANGE ON THE PHENOLOGY AND YIELD OF MAIZE IN VENEZUELA de Ciencias, Universidad de Los Andes, Mdrida 5101, Venezuela 21nstitute of Applied Sciences, Venezuela 4Centro de Estudios Avanzados del Clima Tropical (CEACT), Ministerio deI Ambiente y de los

  17. Soft photon yield in nuclear interactions

    E-Print Network [OSTI]

    Kokoulina, E

    2015-01-01

    First results of study of a soft photon yield at Nuclotron (LHEP, JINR) in nucleus-nucleus collisions at 3.5 GeV per nucleon are presented. These photons are registered by an BGO electromagnetic calorimeter built by SVD-2 Collaboration. The obtained spectra confirm the excessive yield in the energy region less than 50 MeV in comparison with theoretical estimations and agree with previous experiments at high-energy interactions.

  18. 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 ...

  19. Climate Theme Global Tropical Moored Buoy Array

    E-Print Network [OSTI]

    Climate Theme Global Tropical Moored Buoy Array: Observing, Understanding Observing System for Climate #12;Performance 4 Global Tropical Moored Buoy Array: A coordinated multi-national effort to develop and sustain moored buoy observing systems for climate research

  20. The Dynamics and Predictability of Tropical Cyclones 

    E-Print Network [OSTI]

    Sippel, Jason A.

    2010-01-15

    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 ...

  1. The multiple vortex nature of tropical cyclogenesis 

    E-Print Network [OSTI]

    Sippel, Jason Allen

    2005-02-17

    This thesis contains an observational analysis of the genesis of Tropical Storm Allison (2001). Using a paradigm of tropical cyclone formation as the superposition of potential vorticity (PV) anomalies, the importance of different scales of PV...

  2. 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 ventilation—or the flux of ...

  3. Drilling ban yields verdict

    SciTech Connect (OSTI)

    Nation, L.M.

    1992-01-01

    This paper briefly reviews a lawsuit which is under appeal by the State of Michigan regarding a takings claim filed over a petroleum exploration site. The dispute arose as a result of a 1987 decision by the Michigan Department of Natural Resources forbidding the property owners from developing the mineral rights leased to Miller Brothers in the Huron/Manistee National Forest. This area is bisected by a trend of Silurian Niagaran reef complexes which has a known production history throughout the State. The dunes area of the national forest has been deemed a wilderness area. As a result of the State's decision, the courts have awarded a sum of 71 million dollars to the developer to cover damages and lost resources. The reserve estimates were taken from adjacent areas which showed that the Niagaran reefs are relatively consistent in their yield.

  4. 8, 42214266, 2008 Tropical forest fire

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ACPD 8, 4221­4266, 2008 Tropical forest fire emissions R. J. Yokelson et al. Title Page Abstract Chemistry and Physics Discussions The tropical forest and fire emissions experiment: laboratory fire Publications on behalf of the European Geosciences Union. 4221 #12;ACPD 8, 4221­4266, 2008 Tropical forest fire

  5. Geography 102, Spring 2006 Tropical Climatology

    E-Print Network [OSTI]

    Hours: Tu/Th 9:30p.m-10:30p.m., and by appointment Office: Bunche Hall 1176 Phone: 206 that underly the development of Tropical Cli- mates - the laws that govern the movement of air; solar radiation Circulation in the Tropics - the Hadley Cells, the Trade Winds, the InterTropical Convergence Zone

  6. Geography 102, Spring 2008 Tropical Climatology

    E-Print Network [OSTI]

    Hall 1176 Phone: 206-4590/825-1071, email:raphael@geog.ucla.edu Office Hours: M/W 10:00a.m-11:00a Cli- mates - the laws that govern the movement of air; solar radiation in the Tropics; temperature - the Hadley Cells, the Trade Winds, the InterTropical Convergence Zone, the Tropical ocean circulation

  7. Tropical forest soil microbial communities couple iron and carbon biogeochemistry

    SciTech Connect (OSTI)

    Dubinsky, E.A.; Silver, W.L.; Firestone, M.K.

    2009-10-15

    We report that iron-reducing bacteria are primary mediators of anaerobic carbon oxidation in upland tropical soils spanning a rainfall gradient (3500 - 5000 mm yr-1) in northeast Puerto Rico. The abundant rainfall and high net primary productivity of these tropical forests provide optimal soil habitat for iron-reducing and iron-oxidizing bacteria. Spatially and temporally dynamic redox conditions make iron-transforming microbial communities central to the belowground carbon cycle in these wet tropical forests. The exceedingly high abundance of iron-reducing bacteria (up to 1.2 x 10{sup 9} cells per gram soil) indicated that they possess extensive metabolic capacity to catalyze the reduction of iron minerals. In soils from the higher rainfall sites, measured rates of ferric iron reduction could account for up to 44 % of organic carbon oxidation. Iron reducers appeared to compete with methanogens when labile carbon availability was limited. We found large numbers of bacteria that oxidize reduced iron at sites with high rates of iron reduction and large numbers of iron-reducers. the coexistence of large populations of ironreducing and iron-oxidizing bacteria is evidence for rapid iron cycling between its reduced and oxidized states, and suggests that mutualistic interactions among these bacteria ultimately fuel organic carbon oxidation and inhibit CH4 production in these upland tropical forests.

  8. Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman

    E-Print Network [OSTI]

    1 Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman NOAA-Ocean Buoy Network) moored buoy array is designed to provide high quality data in real-time for improved

  9. The biogeochemistry of tropical lakes: A case study from Lake Matano, Indonesia

    E-Print Network [OSTI]

    Crowe, S. A.; O'Neill, A. H.; Katsev, S.; Hehanussa, P.; Haffner, G. Douglas; Sundby, Bjorn; Mucci, Alfonso; Fowle, David A.

    2008-01-16

    We examined the chemical composition of the water column of Lake Matano, Sulawesi Island, Indonesia, to document how the high abundances of Fe (hydr)oxides in tropical soils and minimal seasonal temperature variability affect biogeochemical cycling...

  10. Yield-stress drops 

    E-Print Network [OSTI]

    German, Guy

    2010-01-01

    The behaviour of viscoplastic drops during formation and detachment from a capillary nozzle, free-fall, impact on a solid substrate and subsequent spreading are investigated experimentally by high-speed imaging. Drop ...

  11. The Tropical Warm Pool International Cloud Experiment

    SciTech Connect (OSTI)

    May, Peter T.; Mather, James H.; Vaughan, Geraint; Jakob, Christian; McFarquhar, Greg; Bower, Keith; Mace, Gerald G.

    2008-05-01

    One of the most complete data sets describing tropical convection ever collected will result from the upcoming Tropical Warm Pool International Cloud Experiment (TWP-ICE) in the area around Darwin, Northern Australia in January and February 2006. The aims of the experiment, which will be operated in conjunction with the DOE Atmospheric Radiation Measurement (ARM) site in Darwin, will be to examine convective cloud systems from their initial stages through to the decay of the cirrus generated and to measure their impact on the environment. The experiment will include an unprecedented network of ground-based observations (soundings, active and passive remote sensors) combined with low, mid and high altitude aircraft for in-situ and remote sensing measurements. A crucial outcome of the experiment will be a data set suitable to provide the forcing and evaluation data required by cloud resolving and single column models as well as global climate models (GCMs) with the aim to contribute to parameterization development. This data set will provide the necessary link between the observed cloud properties and the models that are attempting to simulate them. The experiment is a large multi-agency experiment including substantial contributions from the United States DOE ARM program, ARM-UAV program, NASA, the Australian Bureau of Meteorology, CSIRO, EU programs and many universities.

  12. The tropical double description method

    E-Print Network [OSTI]

    Allamigeon, Xavier; Goubault, Eric

    2010-01-01

    We develop a tropical analogue of the classical double description method allowing one to compute an internal representation (in terms of vertices) of a polyhedron defined externally (by inequalities). The heart of the tropical algorithm is a characterization of the extreme points of a polyhedron in terms of a system of constraints which define it. We show that checking the extremality of a point reduces to checking whether there is only one minimal strongly connected component in an hypergraph. The latter problem can be solved in almost linear time, which allows us to eliminate quickly redundant generators. We report extensive tests (including benchmarks from an application to static analysis) showing that the method outperforms experimentally the previous ones by orders of magnitude. The present tools also lead to worst case bounds which improve the ones provided by previous methods.

  13. Airborne LiDAR Detects Selectively Logged Tropical Forest Even in an Advanced Stage of Recovery

    E-Print Network [OSTI]

    Kent, Rafi; Lindsell, Jeremy A.; Laurin, Gaia Vaglio; Valentini, Riccardo; Coomes, David A.

    2015-01-01

    logged tropical forests: the attained and the attainable. Conserv. Lett. 2012, 5, 296–303. 10. Silver, W. L.; Ostertag, R.; Lugo, a. E. The Potential for Carbon Sequestration Through Reforestation of Abandoned Tropical Agricultural and Pasture Lands... be of high conservation value [2,7–9] and act as globally-important carbon sinks [9–12]. However, there is much uncertainty regarding the changing extent of regenerating forests, their rate and stage of recovery, and the influence of recovery on further...

  14. The Role of the Tropics in Abrupt Climate Changes

    SciTech Connect (OSTI)

    Fedorov, Alexey

    2013-12-07

    Topics addressed include: abrupt climate changes and ocean circulation in the tropics; what controls the ocean thermal structure in the tropics; a permanent El Niño in paleoclimates; the energetics of the tropical ocean.

  15. Comparison of oilseed yields: a preliminary review

    SciTech Connect (OSTI)

    Duke, J.A.; Bagby, M.O.

    1982-01-01

    It was assumed that for most oilseed crops, 90% of the oil yield might be considered as profit. To compare oil seeds, pertinent portions of the yield and energy paragraphs from a summary published by Dr. Duke for DOE Grant No. 59-2246-1-6-054-0 with Dr. Bagby as ADODR were reproduced. The seed yields ranged from 200 to 14,000 kg/ha, the low one too low to consider and the high one suspiciously high. The yield of 14,000 kg oil per hectare is equivalent to more than 30 barrels of oil per hectare. The energy species included ambrette, tung-oil tree, cashew, wood-oil tree, mu-oil tree, peanut, mustard greens; rape, colza; black mustard, turnip, safflower, colocynth, coconut, crambe, African oil palm, soybean, cotton, sunflower, Eastern black walnut, Engligh walnut, meadow foam, flax, macadamia nuts, opium poppy, perilla, almond, castorbean, Chinese tallow tree, sesame, jojoba, yellow mustard, stokes' aster, and Zanzibar oilvine. 1 table. (DP)

  16. Benefits of Tropical Forest Management Under the New Climate...

    Open Energy Info (EERE)

    Benefits of Tropical Forest Management Under the New Climate Change Agreement-A Case Study in Cambodia Jump to: navigation, search Name Benefits of Tropical Forest Management Under...

  17. A tropical influence on global climate

    SciTech Connect (OSTI)

    Schneider, E.K.; Kirtman, B.P.; Lindzen, R.S.

    1997-05-15

    A potential influence of tropical sea surface temperature on the global climate response to a doubling of the CO{sub 2} concentration is tested using an atmospheric general circulation model coupled to a slab mixed layer ocean. The warming is significantly reduced when sea surface temperatures in the eastern equatorial Pacific cold tongue region between latitudes 2.25{degrees}N and 2.25{degrees}S are held at the control simulation values. Warming of the global mean temperature outside of the cold tongue region is reduced from 2.4{degrees}C in the unconstrained case to 1.9{degrees}C when the sea surface temperature constraint is applied. The decrease in the warming results from a positive net heat flux into the ocean cold tongue region and implicit heat storage in the subsurface ocean, induced by horizontal atmospheric heat fluxes. The reduced surface temperature warming outside of the cold tongue region is due to reduction in the downward longwave radiative flux at the surface, caused in turn by reduced atmospheric temperature and moisture. The global mean surface temperature responds to the heat storage in the ocean as if the global mean radiative forcing due to the doubled CO{sub 2} (approximately 4 W m{sup {minus}2}) was reduced by the value of the global mean heat flux into the ocean. This mechanism also provides a possible explanation for the observed high correlation on interannual timescales between the global mean tropospheric temperature and sea surface temperature in the eastern tropical Pacific. The results emphasize the importance of correctly modeling the dynamical processes in the ocean and atmosphere that help determine the sea surface temperature in the equatorial eastern Pacific, in addition to the thermodynamical processes, in projecting global warming. 23 refs., 8 figs.

  18. 7, 69036958, 2007 Tropical Forest fire

    E-Print Network [OSTI]

    Boyer, Edmond

    ACPD 7, 6903­6958, 2007 Tropical Forest fire emissions R. J. Yokelson et al. Title Page Abstract Discussions The Tropical Forest and fire emissions experiment: overview and airborne fire emission factor Forest Service, Fire Sciences Laboratory, Missoula, MT, USA Received: 4 May 2007 ­ Accepted: 10 May 2007

  19. Weather-based forecasts of California crop yields

    SciTech Connect (OSTI)

    Lobell, D B; Cahill, K N; Field, C B

    2005-09-26

    Crop yield forecasts provide useful information to a range of users. Yields for several crops in California are currently forecast based on field surveys and farmer interviews, while for many crops official forecasts do not exist. As broad-scale crop yields are largely dependent on weather, measurements from existing meteorological stations have the potential to provide a reliable, timely, and cost-effective means to anticipate crop yields. We developed weather-based models of state-wide yields for 12 major California crops (wine grapes, lettuce, almonds, strawberries, table grapes, hay, oranges, cotton, tomatoes, walnuts, avocados, and pistachios), and tested their accuracy using cross-validation over the 1980-2003 period. Many crops were forecast with high accuracy, as judged by the percent of yield variation explained by the forecast, the number of yields with correctly predicted direction of yield change, or the number of yields with correctly predicted extreme yields. The most successfully modeled crop was almonds, with 81% of yield variance captured by the forecast. Predictions for most crops relied on weather measurements well before harvest time, allowing for lead times that were longer than existing procedures in many cases.

  20. Effect of Organic Farming on Soil Fertility , Yield and Quality of Crops in the Tropics

    E-Print Network [OSTI]

    Bhaskaran, Usha Pankajam; Krishna, Devi

    2009-01-01

    manures by the farmers in Kerala, the most southern State ofvegetable crops grown in Kerala, cowpea occupies a prime

  1. Effect of Organic Farming on Soil Fertility , Yield and Quality of Crops in the Tropics

    E-Print Network [OSTI]

    Bhaskaran, Usha Pankajam; Krishna, Devi

    2009-01-01

    vegetable production. Vermi compost, which is produced byT 4 : Full recommended dose as Vermi compost; T 5 : Fullrecommended dose as Vermi compost + P solubilising micro

  2. Effect of row spacing on yield and yield components of winter wheat cultivars 

    E-Print Network [OSTI]

    Peters, Ross Jay

    1977-01-01

    was found at McGrego~ for this trait. Culms per m were increased by 2 decreased row width at all locations and in all cultivars except 'Coker 68-15' and 'TAM N-101' at McGregor. These cultivars decreased in culm number. Five hundred seed weight... width on cereals. He noted that reducing row width generally increased yields, particularly at high population levels. While culms per unit area behaved in a similar manner, data on other yield components were inconclusive or not mentioned. Holliday...

  3. Genome sequence of the Brown Norway rat yields insights into

    E-Print Network [OSTI]

    Payseur, Bret

    Genome sequence of the Brown Norway rat yields insights into mammalian evolution Rat Genome Norway (BN) rat strain. The sequence represents a high-quality `draft' covering over 90% of the genome

  4. UNCONVENTIONAL METHODS FOR YIELD IMPROVEMENT

    E-Print Network [OSTI]

    Beckermann, Christoph

    AND RENEWABLE ENERGY · U.S. DEPARTMENT OF ENERGY Listed in order of statistical significance in influencing CASTING THROUGH DIRECTIONAL SOLIDIFICATION OFFICE OF INDUSTRIAL TECHNOLOGIES ENERGY EFFICIENCY. Project Fact Sheet BENEFITS · Increase in casting yield on current practices by 10% · Develop techniques

  5. The Tropical Forest and Fire Emissions Experiment: overview and airborne fire emission factor measurements

    E-Print Network [OSTI]

    2007-01-01

    W. M. : The tropical forest and fire emissions experiment:Physics The Tropical Forest and Fire Emissions Experiment:A. : The tropical forest and fire emissions experiment:

  6. A Model Evaluation Data Set for the Tropical ARM Sites

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

    Jakob, Christian

    2008-01-15

    This data set has been derived from various ARM and external data sources with the main aim of providing modelers easy access to quality controlled data for model evaluation. The data set contains highly aggregated (in time) data from a number of sources at the tropical ARM sites at Manus and Nauru. It spans the years of 1999 and 2000. The data set contains information on downward surface radiation; surface meteorology, including precipitation; atmospheric water vapor and cloud liquid water content; hydrometeor cover as a function of height; and cloud cover, cloud optical thickness and cloud top pressure information provided by the International Satellite Cloud Climatology Project (ISCCP).

  7. A Model Evaluation Data Set for the Tropical ARM Sites

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

    Jakob, Christian

    This data set has been derived from various ARM and external data sources with the main aim of providing modelers easy access to quality controlled data for model evaluation. The data set contains highly aggregated (in time) data from a number of sources at the tropical ARM sites at Manus and Nauru. It spans the years of 1999 and 2000. The data set contains information on downward surface radiation; surface meteorology, including precipitation; atmospheric water vapor and cloud liquid water content; hydrometeor cover as a function of height; and cloud cover, cloud optical thickness and cloud top pressure information provided by the International Satellite Cloud Climatology Project (ISCCP).

  8. Tropical cyclone preparedness and response : opportunities for operations research

    E-Print Network [OSTI]

    Murphy, Maurice D

    2008-01-01

    This thesis explores how operations research methods can be applied in the emergency response community by looking at two recent tropical storm disasters; tropical cyclone Yemyin in Pakistan, June 2007 and super typhoon ...

  9. Diurnal analysis of intensity trends in Atlantic tropical cyclones

    E-Print Network [OSTI]

    Kowch, Roman S

    2013-01-01

    I postulate that a diurnal cycle may exist in observational variables related to tropical cyclone (TC) intensity. Prior studies document a significant diurnal signal in moist convection across tropical regions. Since ...

  10. Channel planform dynamics of an alluvial tropical river 

    E-Print Network [OSTI]

    Alvarez, Aldo

    2005-08-29

    apparently plays a relatively minor role as a formative event in shaping the overall humid tropical landscape. A third objective was to develop an empirical model for predicting bend migration rates in humid tropical rivers, resulting in empirical...

  11. The Precipitation Characteristics of ISCCP Tropical Weather States DONGMIN LEE

    E-Print Network [OSTI]

    Kang, In-Sik

    The Precipitation Characteristics of ISCCP Tropical Weather States DONGMIN LEE GESTAR, University The authors examine the daytime precipitation characteristics of the International Satellite Cloud Climatology precipitation dataset used is the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation

  12. Ocean dynamics and thermodynamics in the tropical Indo- Pacific region

    E-Print Network [OSTI]

    Drushka, Kyla

    2011-01-01

    Pacific Oceans . . . . . . . . . . . . . . . . . . . . . . . . . . . . .in the eastern tropical Pacific Ocean associated with thethe western equatorial Pacific Ocean. J. Geophys. Res. , 96,

  13. Thesis proposal CSF Brazil 2014 Dendrimers as new drugs against neglected tropical diseases

    E-Print Network [OSTI]

    Bordenave, Charles

    Thesis proposal CSF Brazil 2014 Title: Dendrimers as new drugs against neglected tropical diseases America, particularly in Brazil. The #12;disease is severe in people with weakened immune systems, finding new medications is of high interest both for France and Brazil. We propose to use dendrimers

  14. Solid precipitation on a tropical glacier in Bolivia measured with an ultrasonic depth gauge

    E-Print Network [OSTI]

    Berthier, Etienne

    Solid precipitation on a tropical glacier in Bolivia measured with an ultrasonic depth gauge Jean effect produces precipitation at midday in the Andean valleys and in the afternoon in the high mountains the main source of melting energy. INDEX TERMS: 3354 Meteorology and Atmospheric Dynamics: Precipitation

  15. Climate Science in the Tropics: Waves, Vortices, Boualem Khouider1

    E-Print Network [OSTI]

    Stechmann, Samuel N.

    Climate Science in the Tropics: Waves, Vortices, and PDEs Boualem Khouider1 , Andrew J Majda2 and climate on the entire globe, yet contemporary operational computer models are often deficient.10 Keywords: Climate science, Tropical meteorology, waves, vortices, convection, PDEs, MJO, GCMs, tropical

  16. Tropical cyclone energy dispersion under vertical shears Xuyang Ge,1

    E-Print Network [OSTI]

    Li, Tim

    Tropical cyclone energy dispersion under vertical shears Xuyang Ge,1 Tim Li,1,2 and Xiaqiong Zhou1] Tropical cyclone Rossby wave energy dispersion under easterly and westerly vertical shears is investigated, and X. Zhou (2007), Tropical cyclone energy dispersion under vertical shears, Geophys. Res. Lett., 34, L

  17. LOW LEVEL JETS IN THE TROPICAL AMERICAS Submitted by

    E-Print Network [OSTI]

    Schubert, Wayne H.

    THESIS LOW LEVEL JETS IN THE TROPICAL AMERICAS Submitted by GABRIELA MORA ROJAS Department LEVEL JETS IN THE TROP- ICAL AMERICAS BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS FOR THE DEGREE JETS IN THE TROPICAL AMERICAS The climatologies of five tropical low level jets are studied through

  18. What is a Hurricane? Tropical system with maximum sustained

    E-Print Network [OSTI]

    Meyers, Steven D.

    Hurricane 101 #12;What is a Hurricane? · Tropical system with maximum sustained surface wind of 74 mph or greater. A hurricane is the worst and the strongest of all tropical systems. · Also known as a tropical cyclone. #12;Hurricanes in Florida · 1851-2004 Florida's Hurricane Total: 110 Southwest Florida

  19. Hurricane Isaac, August 28, 2012/NOAA Tropical Cyclones

    E-Print Network [OSTI]

    Hurricane Isaac, August 28, 2012/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

  20. Alien plant invasions in tropical and sub-tropical savannas: patterns, processes and prospects

    E-Print Network [OSTI]

    Foxcroft, Llewellyn C.; Richardson, David M.; Rejmánek, Marcel; Pyšek, Petr

    2010-01-01

    Tanzania Species Family Alien plant invasions in savannasLo pez-Olmedo et al. 2007). Alien plant invasions in Africanspecies of naturalised alien plants for tropical savannas in

  1. Determination of thermal neutron capture gamma yields

    E-Print Network [OSTI]

    Harper, Thomas Lawrence

    1969-01-01

    A method of analysing Ge(Li) thermal neutron capture gamma spectra to obtain total gamma yields has been developed. Tie method determines both the yields from the well resolved gamma peaks in a spectrum as well as the gamma ...

  2. Determination of thermal neutron capture gamma yields.

    E-Print Network [OSTI]

    Harper, Thomas Lawrence

    1969-01-01

    A method of analysing Ge(Li) thermal neutron capture gamma spectra to obtain total gamma yields has been developed. Tie method determines both the yields from the well resolved gamma peaks in a spectrum as well as the gamma ...

  3. Climate Science: Tropical Expansion by Ocean Swing

    SciTech Connect (OSTI)

    Lu, Jian

    2014-04-01

    The tropical belt has become wider over the past decades, but climate models fall short of capturing the full rate of the expansion. The latest analysis of the climate simulations suggests that a long-term swing of the Pacific Decadal Oscillation is the main missing cause.

  4. Chapter 4587 TROPICAL CYCLOGENESIS IN WIND SHEAR

    E-Print Network [OSTI]

    Nolan, David S.

    , it is shown that small values of wind shear in the range of 1.25 to 5 ms -1 are the most favorable, and very and middle troposphere, and a relatively small value of vertical wind shear, which is the change with heightChapter 4587 TROPICAL CYCLOGENESIS IN WIND SHEAR: CLIMATOLOGICAL RELATIONSHIPS AND PHYSICAL

  5. Yield stress and elasticity influence on surface tension measurements

    E-Print Network [OSTI]

    Loren Jørgensen; Marie Le Merrer; Hélène Delanoë-Ayari; Catherine Barentin

    2015-06-04

    We have performed surface tension measurements on carbopol gels of different concentrations and yield stresses. Our setup, based on the force exerted by a capillary bridge on two parallel plates, allows to measure an effective surface tension of the complex fluid and to investigate the influence of flow history. More precisely the effective surface tension measured after stretching the bridge is always higher than after compressing it. The difference between the two values is due to the existence of a yield stress in the fluid. The experimental observations are successfully reproduced with a simple elasto-plastic model. The shape of successive stretching-compression cycles can be described by taking into account the yield stress and the elasticity of the gel. We show that the surface tension $\\gamma_{LV}$ of yield stress fluids is the mean of the effective surface tension values only if the elastic modulus is high compared to the yield stress. This work highlights that thermodynamical quantities measurements are challenged by the fluid out-of-equilibrium state implied by jamming, even at small scales where the shape of the bridge is driven by surface energy. Therefore setups allowing deformation in opposite directions are relevant for measurements on yield stress fluids.

  6. Experiment to Characterize Tropical Cloud Systems

    SciTech Connect (OSTI)

    May, Peter T.; Mather, Jim H.; Jakob, Christian

    2005-08-02

    A major experiment to study tropical convective cloud systems and their impacts will take place around Darwin, Northern Australia in early 2006. The Tropical Warm Pool International Cloud Experiment (TWP-ICE) is a collaboration including the DOE ARM (Atmospheric Radiation Measurement) and ARM-UAV programs, NASA centers, the Australian Bureau of Meteorology, CSIRO, and universities in the USA, Australia, Japan, the UK, and Canada. TWP-ICE will be preceded in November/December 2004 by a collaborating European aircraft campaign involving the EU SCOUT-O3 and UK NERC ACTIVE projects. Detailed atmospheric measurements will be made in the Darwin area through the whole Austral summer, giving unprecedented coverage through the pre-monsoon and monsoon periods.

  7. Yield criteria for quasibrittle and frictional materials

    E-Print Network [OSTI]

    Davide Bigoni; Andrea Piccolroaz

    2010-10-09

    A new yield/damage function is proposed for modelling the inelastic behaviour of a broad class of pressure-sensitive, frictional, ductile and brittle-cohesive materials. The yield function allows the possibility of describing a transition between the shape of a yield surface typical of a class of materials to that typical of another class of materals. This is a fundamental key to model the behaviour of materials which become cohesive during hardening (so that the shape of the yield surface evolves from that typical of a granular material to that typical of a dense material), or which decrease cohesion due to damage accumulation. The proposed yield function is shown to agree with a variety of experimental data relative to soil, concrete, rock, metallic and composite powders, metallic foams, porous metals, and polymers. The yield function represents a single, convex and smooth surface in stress space approaching as limit situations well-known criteria and the extreme limits of convexity in the deviatoric plane. The yield function is therefore a generalization of several criteria, including von Mises, Drucker-Prager, Tresca, modified Tresca, Coulomb-Mohr, modified Cam-clay, and --concerning the deviatoric section-- Rankine and Ottosen. Convexity of the function is proved by developing two general propositions relating convexity of the yield surface to convexity of the corresponding function. These propositions are general and therefore may be employed to generate other convex yield functions.

  8. Clarence Strait Tidal Energy Project, Tenax Energy Tropical Tidal...

    Open Energy Info (EERE)

    Page Edit History Clarence Strait Tidal Energy Project, Tenax Energy Tropical Tidal Test Centre, Jump to: navigation, search 1 Retrieved from "http:en.openei.orgw...

  9. Nitrogen deposition in tropical forests from savanna and deforestation fires

    E-Print Network [OSTI]

    Chen, Y; Randerson, JT; Van Der Werf, GR; Morton, DC; Mu, M; Kasibhatla, PS

    2010-01-01

    15, Atkinson R (2000) Atmospheric chemistry of VOCs and NOx.tropics – impact on atmospheric chemistry and biogeochemicalimpact of fires on atmospheric chemistry. N r can be emitted

  10. "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...

  11. 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.

    2012-09-04

    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.

  12. Yield Strength as a Thermodynamic Consequence of Information Erasure

    E-Print Network [OSTI]

    Katira, Parag

    2015-01-01

    We observe that the yield strength of a variety of materials, including highly structured and densely packed metals, alloys and semi-crystalline polymers is reasonably approximated by the thermal energy density of the material. This suggests that it is related to the entropic cost of the irreversible work done during plastic deformation rather than the enthalpic cost that depends on the elastic modulus of the material. Here we propose that the entropic cost of material rearrangement in crystalline solids arises from the difference in the uncertainty in building block positions before and after yielding and estimate it using Landauer's principle for information processing. The yield strength thus obtained in given by the thermal energy density of the material multiplied by ln(2) and provides a guidepost in estimating the strength of materials complementary to the "theoretical strength of solids".

  13. Tropical cyclone size in observations and in radiative-convective equilibrium

    E-Print Network [OSTI]

    Chavas, Daniel Robert

    2013-01-01

    Tropical cyclone size remains an unsolved problem in tropical meteorology, yet size plays a significant role in the damage caused by tropical cyclones due to wind, storm surge, and inland freshwater flooding. This work ...

  14. Performance-based assessment of daylight on tropical buildings- a case Study

    E-Print Network [OSTI]

    Szu Cheng, CHIEN

    2013-01-01

    Sustainability in the Tropics For the visual performance ofSustainability in the Tropics Table 3 Metrics conducted to assess dayliglzting performanceSustainability in the Tropics APPROACH Description of the case study model Daylight performance

  15. Carbon sequestration potential of tropical pasture compared with afforestation in Panama

    E-Print Network [OSTI]

    Potvin, Catherine

    Carbon sequestration potential of tropical pasture compared with afforestation in Panama S E B) to estimate the carbon sequestration potential of tropical pasture compared with afforestation; and (3 show the potential for considerable carbon sequestration of tropical afforestation and highlight

  16. Diurnal Precipitation Regimes in the Global Tropics* KAZUYOSHI KIKUCHI AND BIN WANG

    E-Print Network [OSTI]

    Wang, Bin

    Diurnal Precipitation Regimes in the Global Tropics* KAZUYOSHI KIKUCHI AND BIN WANG Department tropical precipitation are documented by using two complementary Tropical Rainfall Measuring Mission (TRMM, and phase propagation characteristics of the diurnal precipitation. The oceanic regime is characterized

  17. Characterization of Trapped Lignin-Degrading Microbes in Tropical Forest Soil

    E-Print Network [OSTI]

    DeAngelis, Kristen

    2012-01-01

    of Trapped Lignin-Degrading Microbes in Tropical Forest Soilof Trapped Lignin-Degrading Microbes in Journals Tropicalof Trapped Lignin-Degrading Microbes in Tropical Forest Soil

  18. The impact of vertical shear on the sensitivity of tropical cyclogenes...

    Office of Scientific and Technical Information (OSTI)

    The impact of vertical shear on the sensitivity of tropical cyclogenesis to environmental rotation and thermodynamic state: TROPICAL CYCLOGENESIS AND SHEAR Citation Details...

  19. Tropical Forest Trust | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company) Jump to: navigation,PowerNetworksEnergia LtdaTropical

  20. Air Cushion Press for Excellent Uniformity, High Yield, and Fast

    E-Print Network [OSTI]

    on the International Technology Roadmap for Semiconductors (ITRS) as next generation lithography (NGL) for semicon, air cushion press (ACP), in which the mold and substrate are pressed against each other by gas

  1. Film quantum yields of EUV & ultra-high PAG photoresists

    E-Print Network [OSTI]

    Hassanein, Elsayed

    2011-01-01

    tested their coating quality, outgassing, and unexposed filmas a function ofsulfonium PAG (TPS-PFBS). Outgassing Tests.Outgassing measurements for ultrahigh iodonium and

  2. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    x-ray pulses by femtoslicing (see "Tailored Terahertz Pulses from a Laser-Modulated Electron Beam"). In their most recent work, the researchers reported the first observation...

  3. High yield fusion in a staged Z-pinch

    E-Print Network [OSTI]

    RAHMAN, H. U; WESSEL, F. J; ROSTOKER, N.; NEY, P. H

    2009-01-01

    transport), pinch energy (kinetic and thermal), and systemconverted into plasma thermal energy. The ion energy beginsenergy, E k , ion-thermal energy, E i , scaled neutron

  4. High-Pressure MOF Research Yields Structural Insights

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

    This information will lead to a variety of beneficial applications including pressure switches, smart body armor, pressure sensors, or shock absorbing materials. A recent review...

  5. High-Yield D-T Neutron Generator

    E-Print Network [OSTI]

    Ludewigt, B.A.

    2008-01-01

    CRC Handbook of Fast Neutron Generators, ISBN 0-8493-2967-1,and can be pulsed. The generator is operated with a D/T gaslifetime target. Initial generator tests at reduce HV showed

  6. High yield fusion in a staged Z-pinch

    E-Print Network [OSTI]

    RAHMAN, H. U; WESSEL, F. J; ROSTOKER, N.; NEY, P. H

    2009-01-01

    and N. Rostoker. Thermonuclear fusion by a z-? pinch. Inof 3.0 × 10 19 and a thermonuclear energy of 84 MJ, that is,that the neutrons are thermonuclear [20]. The configuration

  7. Microbial Electrolysis Cells (MECs) for High Yield Hydrogen ...

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

    Hydrogen Production Workshop held September 24-25, 2013, at the National Renewable Energy Laboratory in Golden, Colorado. bioh2workshopren.pdf More Documents &...

  8. Polar-Molecule-Dominated Electrorheological Fluids Featuring High Yield Stresses

    E-Print Network [OSTI]

    Zexian, Cao

    , brakes and shock absorbers, and many novel uses such as in accurate polishing, robotics, haptic Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P

  9. Inertial Confinement Fusion Ignition and High Yield Campaign

    E-Print Network [OSTI]

    in producing cryogenic targets required for both x-ray and direct drive #12;7 A refurbishment of Z (ZR Project- refurbishment needed · $57M total estimated cost, 4-5 year schedule #12;8 OMEGA Extended Performance (EP

  10. BETO Seeks Stakeholder Input on Achieving High Yields from Algal...

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

    and other stakeholders regarding supply systems and services for the cultivation, logistics, and preprocessing of algal feedstocks. This RFI provides algae stakeholders with an...

  11. Film quantum yields of EUV & ultra-high PAG photoresists

    E-Print Network [OSTI]

    Hassanein, Elsayed

    2011-01-01

    T. H. , Pottebaum, I. , Cabral, A. , Roberts, 1. , "ChangesD. K. , Goodman, R. B. , Cabral, A. , "Contributions toT.H. , Astolfi, D. K. , Cabral, A. and Roberts, J. , "PAG

  12. Olefins from High Yield Autothermal Reforming Process - Energy Innovation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeeding access toOctober 1996 -Workers'OfficialSanFoot)Oklahoma99Portal

  13. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate studentScienceLaboratoryandBryanoutreach Laser

  14. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate studentScienceLaboratoryandBryanoutreach LaserLaser

  15. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResourcelogo and- Energy Innovation PortalImpactLaser

  16. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResourcelogo and- Energy Innovation

  17. Laser Seeding Yields High-Power Coherent Terahertz Radiation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResourcelogo and- Energy InnovationLaser Seeding

  18. Microbes Produce High Yields of Fatty Alcohols From Glucose - 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on dark matterEnergyPublicatonsSubstances | TheInnovation Portal

  19. Chapter Number1 Biomass Prediction in Tropical Forests:2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Chapter Number1 Biomass Prediction in Tropical Forests:2 The Canopy Grain Approach3 Christophe France9 1. Introduction10 The challenging task of biomass prediction in dense and heterogeneous tropical different forest structures may indeed present similar above ground biomass (AGB) values.13 This is probably

  20. Neural Network forecasts of the tropical Pacific sea surface temperatures

    E-Print Network [OSTI]

    Hsieh, William

    Neural Network forecasts of the tropical Pacific sea surface temperatures Aiming Wu, William W Tang Jet Propulsion Laboratory, Pasadena, CA, USA Neural Networks (in press) December 11, 2005 title: Forecast of sea surface temperature 1 #12;Neural Network forecasts of the tropical Pacific sea

  1. CURRENT SKIPJACK OCEANOGRAPHY CRUISES IN EASTERN TROPICAL PACIFIC OCEAN

    E-Print Network [OSTI]

    CURRENT SKIPJACK OCEANOGRAPHY CRUISES IN EASTERN TROPICAL PACIFIC OCEAN F. Williams A series of skipjack oceanography cruises is planned for two offshore areas in the eastern tropical Pacific Ocean October 23 and arrived in Honolulu November 29; and the David Starr Jordan (Fishery-Oceanography C en t e

  2. Biological Oceanography of the Eastern Tropical Pacific: Summary

    E-Print Network [OSTI]

    540 Biological Oceanography of the Eastern Tropical Pacific: Summary of Existing Information Tuna Oceanography Research Program of the Institute of Marine Resources of the University of California Oceanography of the Eastern Tropical Pacific: Summary of Existing Information By MAURICE BLACKBURN tribution

  3. Facts about ENSO: . Originates in the tropical Pacific

    E-Print Network [OSTI]

    : . Computer models show skill in forecasting tropical Pacific Ocean temperatures one to two years in advance for Pacific Ocean observations that are the foundation of skillful ENSO forecasts: Moored buoys Drifting buoysaaaaaa Facts about ENSO: . Originates in the tropical Pacific . Has a periodicity of 2­7 years

  4. Tropical Moored Buoy Implementation Panel Scottish Association for Marine Science

    E-Print Network [OSTI]

    Tropical Moored Buoy Implementation Panel Scottish Association for Marine Science Oban, Scotland 26 September 2010 8:30 am Welcome and logistics 8:40 The Global Tropical Moored Buoy Array M. J. McPhaden, NOAA/PMEL, Seattle, USA 9:00 Current status of TRITON and m-TRITON buoy array and its data system K. Ando and I. Ueki

  5. Hybrid coupled modeling of the tropical Pacific using neural networks

    E-Print Network [OSTI]

    Hsieh, William

    Hybrid coupled modeling of the tropical Pacific using neural networks Shuyong Li, William W. Hsieh To investigate the potential for improving hybrid coupled models (HCM) of the tropical Pacific by the use: dynamical coupled models, statistical models and hybrid coupled models [Barnston et al., 1994]. A hybrid

  6. Ecological consequences of early Late Pleistocene megadroughts in tropical Africa

    E-Print Network [OSTI]

    Reiners, Peter W.

    Ecological consequences of early Late Pleistocene megadroughts in tropical Africa Andrew S. Cohen conditions in tropical Africa occurred in several discrete episodes between 135 and 90 ka, as demonstrated]. This resulted in extraordinarily low lake levels, even in Africa's deepest lakes. On the basis of well dated

  7. Southern Hemisphere Additional Ozonesondes (SHADOZ) 19982000 tropical ozone climatology

    E-Print Network [OSTI]

    Thompson, Anne

    Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998­2000 tropical ozone climatology 2; published 31 January 2003. [1] The first view of stratospheric and tropospheric ozone variability in the Southern Hemisphere tropics is provided by a 3-year record of ozone soundings from the Southern Hemisphere

  8. Southern Hemisphere Additional Ozonesondes (SHADOZ) 19982004 tropical ozone climatology

    E-Print Network [OSTI]

    Thompson, Anne

    Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998­2004 tropical ozone climatology: 3 more than 3000 ozone profiles from 14 tropical and subtropical sites using balloon- borne technique might cause small station-to-station biases in the total ozone measurement. We present further

  9. Climate change and tropical biodiversity: a new focus

    E-Print Network [OSTI]

    Wisenden, Brian D.

    Climate change and tropical biodiversity: a new focus Jedediah Brodie1 , Eric Post2 and William F, Australia Considerable efforts are focused on the consequences of climate change for tropical rainforests climatic changes and human land use) remain understudied. Key concerns are that aridification could

  10. Root morphology and anchorage of six native tree species from a tropical montane forest and an elfin forest in Ecuador

    E-Print Network [OSTI]

    Lehmann, Johannes

    in tropical forests in Ecuador. Increasing altitude was accompanied by higher wind speeds and more shallow anchorage in soils with low bulk density and in environments with high wind speeds. Abbreviations: AR m. At 3000 m, 48% of the trees were inclined, lying or even partly uprooted. At this altitude, all

  11. NH Timber Yield Tax Overview (RSA 79)

    E-Print Network [OSTI]

    New Hampshire, University of

    land. The bond is usually equal to the amount of expected yield tax. When can you appeal: If a taxpayer denies the appeal then the taxpayer may appeal to the Department of Revenue within 180 days of the tax

  12. Correlation of grain sorghum yield to nitrogen as measured by various soil test methods 

    E-Print Network [OSTI]

    Idris, Md

    1963-01-01

    correlation coeffici- ent was obts. ined wilh the High Plain soils?while the Blackland Prairie soils gave a low and a non-signific; nt value. Harsem and Uan Schreven 26 (20) emphasized that fox a reliable interpretation of results, the incuba- tion... Nitrogen vs. Percent Relative Yield. . . 23 B. Humic Acid vs. Percent Relative Yield 26 C. Organic Matter vs. Percent Relative Yield D. Organic Matter vs. Nitrifiable Nitrogen E. Organic Matter vs. Hurnic Acid . 30 V. SUMMARY AND CONCLUSION VI...

  13. Are tropical forests near a high temperature threshold?

    E-Print Network [OSTI]

    Doughty, Christopher E.; Goulden, Michael L.

    2008-01-01

    evaporative demand and Vapor Pressure Deficit (VPD) andslope of the saturation vapor pressure deficit curve (Pa Ka change in vapor pressure deficit or relative humidity

  14. Neutron source capability assessment for cumulative fission yields measurements

    SciTech Connect (OSTI)

    Descalle, M A; Dekin, W; Kenneally, J

    2011-04-06

    A recent analysis of high-quality cumulative fission yields data for Pu-239 published in the peer-reviewed literature showed that the quoted experimental uncertainties do not allow a clear statement on how the fission yields vary as a function of energy. [Prussin2009] To make such a statement requires a set of experiments with well 'controlled' and understood sources of experimental errors to reduce uncertainties as low as possible, ideally in the 1 to 2% range. The Inter Laboratory Working Group (ILWOG) determined that Directed Stockpile Work (DSW) would benefit from an experimental program with the stated goal to reduce the measurement uncertainties significantly in order to make a definitive statement of the relationship of energy dependence to the cumulative fission yields. Following recent discussions between Lawrence Livermore National Laboratory (LLNL) and Los Alamos National Laboratory (LANL), there is a renewed interest in developing a concerted experimental program to measure fission yields in a neutron energy range from thermal energy (0.025 eV) to 14 MeV with an emphasis on discrete energies from 0.5 to 4 MeV. Ideally, fission yields would be measured at single energies, however, in practice there are only 'quasi-monoenergetic' neutrons sources of finite width. This report outlines a capability assessment as of June 2011 of available neutron sources that could be used as part of a concerted experimental program to measure cumulative fission yields. In a framework of international collaborations, capabilities available in the United States, at the Atomic Weapons Establishment (AWE) in the United Kingdom and at the Commissariat Energie Atomique (CEA) in France are listed. There is a need to develop an experimental program that will reduce the measurement uncertainties significantly in order to make a definitive statement of the relationship of energy dependence to the cumulative fission yields. Fission and monoenergetic neutron sources are available that could support these fission yield experiments in the US, as well as at AWE and CEA. Considerations that will impact the final choice of experimental venues are: (1) Availability during the timeframe of interest; (2) Ability to accommodate special nuclear materials; (3) Cost; (4) Availability of counting facilities; and (5) Expected experimental uncertainties.

  15. Yield Stress Materials in Soft Condensed Matter

    E-Print Network [OSTI]

    Daniel Bonn; Jose Paredes; Morton M. Denn; Ludovic Berthier; Thibaut Divoux; Sébastien Manneville

    2015-02-18

    We present a comprehensive review of the physical behavior of yield stress materials in soft condensed matter, which encompasses a broad range of soft materials from colloidal assemblies and gels to emulsions and non-Brownian suspensions. All these disordered materials display a nonlinear response to an external mechanical forcing, which results from the existence of a finite force threshold for flow to occur, the yield stress. We discuss both the physical origin and the rheological consequences associated with this nonlinear behavior. We give an overview of the different experimental techniques developed to measure the yield stress. We discuss extensively the recent progress concerning a microscopic description of the flow dynamics of yield stress materials, emphasizing in particular the role played by relaxation timescales, the interplay between shear flow and aging behavior, the existence of inhomogeneous shear flows and shear bands, wall slip, and non-local effects in confined geometries. We finally review the status of modeling of the shear rheology of yield stress materials in the framework of continuum mechanics.

  16. Lacunarity as a texture measure for a tropical forest landscape

    SciTech Connect (OSTI)

    Su, Haiping; Krummel, J.

    1996-01-01

    Fragmentation and loss of tropical forest cover alters terrestrial plant and animal population dynamics, reduces biodiversity and carbon storage capacity, and, as a global phenomenon could affect regional and global climate patterns. Lacunarity as a texture measure can offer a simple solution to characterize the texture of tropical forest landscape and determine spatial patterns associated with ecological processes. Lacunarity quantifies the deviation from translational invariance by describing the distribution of gaps within a binary image at multiple scales. As lacunarity increases, the spatial arrangement of tropical forest gaps will also increase. In this study, we used the Spatial Modeler in Imagine as a graphic programming tool to calculate lacunarity indices for a tropical forest landscape in Southern Mexico and Northern Guatemala. Lacunarity indices were derived from classified Landsat MSS images acquired in 1974 and 1984. Random-generated binary images were also used to derive lacunarity indices and compared with the lacunarity of forest patterns derived from the classified MSS images. Tropical forest area declined about 17%, with most of the forest areas converted into pasture/grassland for grazing. During this period, lacunarity increased about 25%. Results of this study suggest that tropical forest fragmentation could be quantified with lacunarity measures. The study also demonstrated that the Spatial Modeler can be useful as a programming tool to quantify spatial patterns of tropical forest landscape by using remotely sensed data.

  17. Tropical Cloud Properties and Radiative Heating Profiles

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

    Mather, James

    2008-01-15

    We have generated a suite of products that includes merged soundings, cloud microphysics, and radiative fluxes and heating profiles. The cloud microphysics is strongly based on the ARM Microbase value added product (Miller et al., 2003). We have made a few changes to the microbase parameterizations to address issues we observed in our initial analysis of the tropical data. The merged sounding product is not directly related to the product developed by ARM but is similar in that it uses the microwave radiometer to scale the radiosonde column water vapor. The radiative fluxes also differ from the ARM BBHRP (Broadband Heating Rate Profile) product in terms of the radiative transfer model and the sampling interval.

  18. Tropical Cloud Properties and Radiative Heating Profiles

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

    Mather, James

    We have generated a suite of products that includes merged soundings, cloud microphysics, and radiative fluxes and heating profiles. The cloud microphysics is strongly based on the ARM Microbase value added product (Miller et al., 2003). We have made a few changes to the microbase parameterizations to address issues we observed in our initial analysis of the tropical data. The merged sounding product is not directly related to the product developed by ARM but is similar in that it uses the microwave radiometer to scale the radiosonde column water vapor. The radiative fluxes also differ from the ARM BBHRP (Broadband Heating Rate Profile) product in terms of the radiative transfer model and the sampling interval.

  19. External noise yields a What template?

    E-Print Network [OSTI]

    Klein, Stanley

    External noise yields a surprise: What template? Stanley Klein, Dennis Levi, Suko Toyofuku Vision Science University of California, Berkeley #12;Overview Detection of patterns in noise Why noise masking is a powerful technique The Lu-Dosher framework: useful black boxes Graham-Nachmias experiment in noise (detect

  20. Yielding and flow of foamed metakaolin pastes

    E-Print Network [OSTI]

    Lucie Ducloué; Olivier Pitois; Laurent Tocquer; Julie Goyon; Guillaume Ovarlez

    2015-10-01

    Metakaolin is a broadly used industrial raw material, with applications in the production of ceramics and geopolymers, and the partial replacement of Portland cement. The early stages of the manufacturing of some of these materials require the preparation and processing of a foamed metakaolin-based slurry. In this study, we propose to investigate the rheology of a foamed metakaolin-based fresh paste by performing well-controlled experiments. We work with a non-reactive metakaolin paste containing surfactant, in which we disperse bubbles of known radius at a chosen volume fraction. We perform rheometry measurements to characterize the minimum stress required for the foamed materials to flow (yield stress), and the dissipation occurring during flow. We show that the yield stress of the foamed samples is equal to the one of the metakaolin paste, and that dissipation during flow increases quadratically with the bubble volume fraction. Comparison with yielding and flow of model foamed yield stress fluids allows us to understand these results in terms of coupling between the bubbles' surface tension and the metakaolin paste's rheology.

  1. YIELD IMPROVEMENT CASE STUDY: STACKED SPRING CAPS

    E-Print Network [OSTI]

    Beckermann, Christoph

    % of the caps cast from this design required welding for shrinkage defects, and all caps had some reoxidation the findings of a yield improvement study performed for a 3" spring cap cast from WCB steel. The original mold inclusions. The casting simulation software package MAGMAsoft was utilized to simulate alternate mold

  2. Global crop yield losses from recent warming

    SciTech Connect (OSTI)

    Lobell, D; Field, C

    2006-06-02

    Global yields of the world-s six most widely grown crops--wheat, rice, maize, soybeans, barley, sorghum--have increased since 1961. Year-to-year variations in growing season minimum temperature, maximum temperature, and precipitation explain 30% or more of the variations in yield. Since 1991, climate trends have significantly decreased yield trends in all crops but rice, leading to foregone production since 1981 of about 12 million tons per year of wheat or maize, representing an annual economic loss of $1.2 to $1.7 billion. At the global scale, negative impacts of climate trends on crop yields are already apparent. Annual global temperatures have increased by {approx}0.4 C since 1980, with even larger changes observed in several regions (1). While many studies have considered the impacts of future climate changes on food production (2-5), the effects of these past changes on agriculture remain unclear. It is likely that warming has improved yields in some areas, reduced them in others, and had negligible impacts in still others; the relative balance of these effects at the global scale is unknown. An understanding of this balance would help to anticipate impacts of future climate changes, as well as to more accurately assess recent (and thereby project future) technologically driven yield progress. Separating the contribution of climate from concurrent changes in other factors--such as crop cultivars, management practices, soil quality, and atmospheric carbon dioxide (CO{sub 2}) levels--requires models that describe the response of yields to climate. Studies of future global impacts of climate change have typically relied on a bottom-up approach, whereby field scale, process-based models are applied to hundreds of representative sites and then averaged (e.g., ref 2). Such approaches require input data on soil and management conditions, which are often difficult to obtain. Limitations on data quality or quantity can thus limit the utility of this approach, especially at the local scale (6-8). At the global scale, however, many of the processes and impacts captured by field scale models will tend to cancel out, and therefore simpler empirical/statistical models with fewer input requirements may be as accurate (8, 9). Empirical/statistical models also allow the effects of poorly modeled processes (e.g., pest dynamics) to be captured and uncertainties to be readily quantified (10). Here we develop new, empirical/statistical models of global yield responses to climate using datasets on broad-scale yields, crop locations, and climate variability. We focus on global average yields for the six most widely grown crops in the world: wheat, rice, maize, soybeans, barley, and sorghum. Production of these crops accounts for over 40% of global cropland area (11). 55% of non-meat calories, and over 70% of animal feed (12).

  3. Persistent drying in the tropics linked to natural forcing

    E-Print Network [OSTI]

    Winter, Amos; Zanchettin, Davide; Miller, Thomas; Kushnir, Yochanan; Black, David; Lohmann, Gerrit; Burnett, Allison; Haug, Gerald H.; Estrella-Martínez, Juan; Breitenbach, Sebastian F. M.; Beaufort, Luc; Rubino, Angelo; Cheng, Hai

    2015-07-14

    Approximately half of the world’s population lives in the tropics, and future changes in the hydrological cycle will impact not just the freshwater supplies but also energy production in areas dependent upon hydroelectric power. It is vital...

  4. Eddy formation and propagation in the eastern tropical Pacific 

    E-Print Network [OSTI]

    Jhingran, Vikas Gopal

    1997-01-01

    Observations of eddies in the eastern tropical Pacific from TOPEX altimetry data show that there are seasonal and interannual variations in eddy activity. Comparisons between time of eddy formation and corresponding wind ...

  5. Reduction of tropical land region precipitation variability via transpiration

    E-Print Network [OSTI]

    Lee, Jung-Eun

    Tropical rainforests are known to exhibit low intraseasonal precipitation variability compared with oceanic areas with similar mean precipitation in observations and models. In the present study, the potential role of ...

  6. Hyperspectral Remote Sensing of Tropical Grass Quality and Quantity

    E-Print Network [OSTI]

    Hyperspectral Remote Sensing of Tropical Grass Quality and Quantity Onisimo Mutanga 7 April 2004, The Netherlands Prof. W. J. Bond University of Cape Town, South Africa #12;Hyperspectral Remote Sensing 1.2 Hyperspectral remote sensing

  7. Tropical cyclone precipitation risk in the Southern United States

    E-Print Network [OSTI]

    Shedd, Sandra Michael

    2015-01-01

    This thesis works to evaluate the new rainfall algorithm that is used to simulate longterm tropical cyclone precipitation (TCP) climatology throughout the southeastern United States. The TCP climatology is based on a fleet ...

  8. Future precipitation changes and their implications for tropical peatlands

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Future precipitation changes and their implications for tropical peatlands Wenhong Li,1 Robert E. Dickinson, R. Fu, G.-Y. Niu, Z.-L. Yang, and J. G. Canadell (2007), Future precipitation changes

  9. Precipitable water structure in tropical systems as estimated from TOVS 

    E-Print Network [OSTI]

    Hatfield, Eric

    1994-01-01

    The spatial and temporal structures of precipitable water (pW) in tropical systems are estimated using TIROS Operational Vertical Sounder (TOVS) radiances over ten cool seasons and two entire years. Statistical regression ...

  10. The Tropical Brown Alga Lobophora variegata (Lamouroux) Womersley: A Prospective Bioindicator for Ag Contamination in Tropical Coastal Waters

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The Tropical Brown Alga Lobophora variegata (Lamouroux) Womersley: A Prospective Bioindicator determined in the brown alga Lobophora variegata, using radiotracer techniques. Results indicate that this widely distributed alga could be a useful bioindicator species for surveying silver contamination

  11. 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. ...

  12. Tropical waves in a GCM with zonal symmetry

    SciTech Connect (OSTI)

    Yip, K.J.J.; North, G.R. (Texas A M Univ., College Station, TX (United States))

    1993-09-01

    Tropical wave phenomena have been examined in the last 520 days of two 15-year runs of a low-resolution general circulation model (CCMO). The model boundary conditions were simplified to all-land, perpetual equinox, and no topography. The two runs were for fixed soil moisture at 75% and 0%, the so-called [open quotes]wet[close quotes] and [open quotes]dry[close quotes] models. Both models develop well-defined ITCZs with low-level convergence erratically concentrated along the equator. Highly organized eastward-propagating waves are detectable in both models with different wave speeds depending on the presence of moisture. The wave amplitudes (in, e.g., vertical velocity) are many orders of magnitude stronger in the wet model. The waves have a definite transverse nature as precipitation (low-level convergence) patches tend to move systematically north and south across the equator. In the wet model the waves are distinctly nondispersive and the transit time for passage around the earth is about 50 days, consistent with the Madden-Julian frequency. The authors are also able to see most of the expected linear wave modes in spectral density plots in the frequency-wavenumber plane and compare them for the wet and dry cases. 28 refs., 16 figs.

  13. Fragment Yields Calculated in a Time-Dependent Microscopic Theory...

    Office of Scientific and Technical Information (OSTI)

    Fragment Yields Calculated in a Time-Dependent Microscopic Theory of Fission Citation Details In-Document Search Title: Fragment Yields Calculated in a Time-Dependent Microscopic...

  14. Innovative, Lower Cost Sensors and Controls Yield Better Energy...

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

    Yield Better Energy Efficiency Innovative, Lower Cost Sensors and Controls Yield Better Energy Efficiency March 23, 2015 - 1:05pm Addthis ORNL researchers are experimenting with...

  15. Tropical dry-forest mammals of Palo Verde: Ecology and conservation in a changing landscape

    E-Print Network [OSTI]

    Stoner, Kathryn E.; Timm, Robert M.

    2004-02-01

    More than 114 species of mammals originally were present in Costa Rica’s tropical dry forest, and perhaps 110 species are still found there today. Bats are the most diverse group, with more than 66 species, followed by 11 species of rodents, 7 species of marsupials, 6 species in the weasel family, 5 species of cats, 3 species in the raccoon family, 3 species of primates, 3 species of artiodactyls, 2 species of canids, 2 species of xenarthrans (edentates), 1 rabbit, and 1 tapir. Costa Rica has no endemic dry forest mammals. The species that have been extirpated from this region were either highly prized game species that have been eliminated by overhunting (white-lipped peccaries) or were specialists that either feed on specific foods or have very specific habitat requirements that have been eliminated by habitat destruction. In Costa Rica 10 of the 13 mammal species recognized as endangered and 7 of the 14 found in reduced populations are found within tropical dry forest habitat. Mammals that inhabit tropical dry forest areas must be capable of dealing with high temperatures, low precipitation in the dry season, and large fluctuations in the availability of food resources during the year. Most mammals of the dry forest can be characterized as resident generalists that shift their diets in order to utilize seasonally available food resources; as resident specialists that forage on insects, seeds, or fruit and nectar; or as migrants that occupy dry forests only seasonally and move to other habitats during periods of low food availability in their foraging area in search of food sources in other areas. Bats, some of which serve as pollinators and seed dispersers, are important components of the dry forest fauna. Some species of bats change habitats within the dry forest or migrate into and out of the dry forest seasonally. Hunting has been, and continues to be, an important threat to most large mammals in dry forest habitats. As early as 1880, large numbers of deer skins were exported from Costa Rica to Europe, the majority of which came from Guanacaste. Illegal poaching is still a serious problem in the protected areas of Guanacaste. Throughout Mesoamerica, deforestation to create pastures and, in recent years, for crop cultivation has negatively affected many populations of tropical dry forest mammals. Approximately 50% of the 250,000 ha area in the lower Tempisque Basin had been deforested by 1956 and by 1970 most of the dry forest had been converted into pastureland. The spread of introduced African grasses and seasonal fires have continued to eliminate mature dry forest in northern Costa Rica in the last decades. Contamination by pesticides from agricultural fields has become a serious threat to the mammalian fauna in the region. The use of cattle as a management tool also threatens the mammalian fauna in tropical dry forest due to their affect on the natural vegetation. Cattle were reintroduced into Parque Nacional Palo Verde in the 1980s in an attempt to control the rapidly expanding cattails in the marsh, which were eliminating habitat for aquatic birds. However, cattle have been ineffective at controlling cattails, and overgrazing of tree seedlings has hindered regeneration of the forest because cattle graze selectively on seedlings of native species. The mammals of the tropical dry forest are among the most poorly known of any of the bioclimatic life zones. Conservation measures for this endangered fauna should include expanded research, training and educational programs for park personnel, economic alternatives, and sustainable development. In addition, efforts should be made for the creation of additional protected areas with buffer zones and for the development of natural regeneration programs.... contaminación por pesticidas en los campos agrícolas se ha convertido en una seria amenaza para los mamíferos de la región. El uso de ganado como herramienta de manejo también es una amenaza para la fauna de mamíferos en el bosque tropical seco debido a su...

  16. Effect of inoculation and nitrogen addition on the yield and yield components of soybeans 

    E-Print Network [OSTI]

    Gambaudo, Sebastian Pedro

    1983-01-01

    this technique resulted in percentages of nitrogen fixed of 37, 27, and 13% for Coker 338, Cobb, and Dowling varieties. Estimates made using total nitrogen by difference were also variable due to variability in the yield data. Percentages of nitrogen fixed... were 20, 19, and 16% for Coker 338, Dowling, and Cobb using this method. A four variable regression model was developed which explained 68% of the variability in grain yield. These factors, in decreasing order of importance, were plant dry weight...

  17. Yield improvement and defect reduction in steel casting

    SciTech Connect (OSTI)

    Kent Carlson

    2004-03-16

    This research project investigated yield improvement and defect reduction techniques in steel casting. Research and technology development was performed in the following three specific areas: (1) Feeding rules for high alloy steel castings; (2) Unconventional yield improvement and defect reduction techniques--(a) Riser pressurization; and (b) Filling with a tilting mold; and (3) Modeling of reoxidation inclusions during filling of steel castings. During the preparation of the proposal for this project, these areas were identified by the High Alloy Committee and Carbon and Low Alloy Committee of the Steel Founders' Society of America (SFSA) as having the highest research priority to the steel foundry industry. The research in each of the areas involved a combination of foundry experiments, modeling and simulation. Numerous SFSA member steel foundries participated in the project through casting trials and meetings. The technology resulting from this project will result in decreased scrap and rework, casting yield improvement, and higher quality steel castings produced with less iteration. This will result in considerable business benefits to steel foundries, primarily due to reduced energy and labor costs, increased capacity and productivity, reduced lead-time, and wider use and application of steel castings. As estimated using energy data provided by the DOE, the technology produced as a result of this project will result in an energy savings of 2.6 x 10{sup 12} BTU/year. This excludes the savings that were anticipated from the mold tilting research. In addition to the energy savings, and corresponding financial savings this implies, there are substantial environmental benefits as well. The results from each of the research areas listed above are summarized.

  18. Can Naked Singularities Yield Gamma Ray Bursts?

    E-Print Network [OSTI]

    H. M. Antia

    1998-07-09

    Gamma-ray bursts are believed to be the most luminous objects in the Universe. There has been some suggestion that these arise from quantum processes around naked singularities. The main problem with this suggestion is that all known examples of naked singularities are massless and hence there is effectively no source of energy. It is argued that a globally naked singularity coupled with quantum processes operating within a distance of the order of Planck length of the singularity will probably yield energy burst of the order of M_pc^2\\approx2\\times 10^{16} ergs, where M_p is the Planck mass.

  19. The yield of Amorphous Solids Under Stress Control at Low Temperatures

    E-Print Network [OSTI]

    Valery Ilyin; Itamar Procaccia; Carmel Shor; Murari Singh

    2015-04-21

    The yield of amorphous solids like metallic glasses under external stress was discussed asserting that it is related to the glass transition by increasing temperature, or that it can be understood using statistical theories of various sorts. Here we study the approach to stress-controlled yield and argue that neither assertions can be supported, at least at low temperatures. The yield of amorphous solids at low temperatures is a highly structured phenomenon, characterized by a specific series of mechanical instabilities, and having no similarity at all to fluidization by increased temperature, real or fictive. The series of instabilities followed by stress controlled yield at low but finite temperature protocols can be predicted by analyzing athermal quasi-static strain controlled protocols, making the latter highly relevant for the deep understanding of the mechanical properties of amorphous solids.

  20. Tropical climate variability from the last glacial maximum to the present

    E-Print Network [OSTI]

    Dahl, Kristina Ariel

    2005-01-01

    This thesis evaluates the nature and magnitude of tropical climate variability from the Last Glacial Maximum to the present. The temporal variability of two specific tropical climate phenomena is examined. The first is the ...

  1. Equilibrium Tropical Cyclone Size in an Idealized State of Axisymmetric Radiative–Convective Equilibrium

    E-Print Network [OSTI]

    Chavas, Daniel Robert

    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 ...

  2. A climatology of tropical synoptic scale behavior from TOVS-estimated precipitable water 

    E-Print Network [OSTI]

    Mackey, Morgan Douglas

    1996-01-01

    Tropical synoptic scale behavior is examined using 3 to 8 day filtered precipitable water (PW) estimated from TOVS operational satellite observations for 24 three-month seasons. Zonally-oriented tropical convergence zones ...

  3. The role of piscivores in a species-rich tropical river 

    E-Print Network [OSTI]

    Layman, Craig Anthony

    2004-11-15

    Much of the world's species diversity is located in tropical and sub-tropical ecosystems, and a better understanding of the ecology of these systems is necessary to stem biodiversity loss and assess community- and ...

  4. 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 ...

  5. Tropical Pacific nutrient dynamics in the modern and pleistocene ocean : insights from the nitrogen isotope system

    E-Print Network [OSTI]

    Rafter, Patrick Anthony

    2009-01-01

    eastern equatorial Pacific Ocean during the past 3 M.Y. ,in the western tropical Pacific Ocean in the Holocene epoch,eastern tropical North Pacific Ocean, Mar. Chem. , 3, 271–

  6. Tropical cyclone motion and recurvature in TCM-90. Master's thesis

    SciTech Connect (OSTI)

    Fitzpatrick, M.E.

    1992-01-01

    Rawinsonde and satellite data collected during the Tropical Cyclone Motion (TCM90) experiment, which was conducted during the summer of 1990 in the Western North pacific, is used to examine tropical cyclone steering motion and recurvature. TCM-90 composite results are compared with those found in a composite study using twenty-one years (1957-77) of Western North Pacific rawinsonde data during the same August-September period and also for all months during this same 21-year period. Both data sets indicate that the composite deep-layer-mean (850-300 mb) winds 5-7 deg from the cyclone center provide an important component of the steering flow for tropical cyclones. However, despite the rawinsonde data enhancements of the TCM-90 experiment, data limitations prevented an accurate observation of steering flow conditions at individual time periods or for the average of only 5-10 time periods when composited together.

  7. Tropical forest responses to increasing atmospheric CO2: current knowledge and opportunities for future research

    E-Print Network [OSTI]

    Bermingham, Eldredge

    their representation in Earth system models. Tropical forests play a significant role in the global carbon cycle

  8. The divergent wind component in data sparse tropical wind fields 

    E-Print Network [OSTI]

    Snyder, Bruce Alan

    1985-01-01

    THE DIVERGENT WIND COMPONENT IN DATA SPARSE TROPICAL WIND FIELDS A Thesis by BRUCE ALAN SNYDER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December... 1985 Major Subject: Meteorology THE DIVERGENT WIND COMPONENT IN DATA SPARSE TROPICAL WIND FIELDS A Thesis by BRUCE ALAN SNYDER Approved as to style and content by: James P. McGuirk (Co-Chairman) Aylmer IL Thompson (Co-Chairman) W. Homer...

  9. 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

  10. An optimizing reduced order FDS for the tropical Pacific Ocean reduced gravity model

    E-Print Network [OSTI]

    Aluffi, Paolo

    An optimizing reduced order FDS for the tropical Pacific Ocean reduced gravity model Zhendong Luoa) for the tropical Pacific Ocean reduced gravity model. Ensembles of data are compiled from transient solutions computed from the discrete equation system derived by FDS for the tropical Pacific Ocean reduced gravity

  11. Reduced Order Modeling of the Upper Tropical Pacific Ocean Model Using Proper Orthogonal Decomposition

    E-Print Network [OSTI]

    Aluffi, Paolo

    Reduced Order Modeling of the Upper Tropical Pacific Ocean Model Using Proper Orthogonal of a large-scale upper ocean circulation in the tropic Pacific domain. We construct different POD models-scale seasonal variability of the tropic Pacific obtained by the original model is well captured by a low

  12. Multivariate Data Assimilation in the Tropics by Using Equatorial Waves NEDJELJKA ZAGAR

    E-Print Network [OSTI]

    Zagar, Nedjeljka

    Multivariate Data Assimilation in the Tropics by Using Equatorial Waves NEDJELJKA ZAGAR 1 multivariate assimila- tion methodology. This applies to both dry and moist idealized tropical systems as well as to a 4D-Var NWP assimilation system. Key words: Tropics, Data assimilation, 4D-Var, Multivariate

  13. Estimating recharge thresholds in tropical karst island aquifers: Barbados, Puerto Rico and Guam

    E-Print Network [OSTI]

    Banner, Jay L.

    Estimating recharge thresholds in tropical karst island aquifers: Barbados, Puerto Rico and Guam in tropical island aquifers, such as Barbados, Guam and Puerto Rico, are significantly influenced by tropical of rainfall. The karst aquifers on Barbados, Guam and Puerto Rico have similar rainwater and groundwater

  14. Primary production in the eastern tropical Pacific: A review J. Timothy Pennington a

    E-Print Network [OSTI]

    Pennington, J. Timothy

    , Peru Abstract The eastern tropical Pacific includes 28 million km2 of ocean between 23.5°N phytoplankton growth (and nitrogen fixation) over large portions of the open-ocean eastern tropical Pacific Pacific. Seasonal cycles are weak over much of the open-ocean eastern tropical Pacific, although several

  15. Eddy mean flow decomposition and eddy diffusivity estimates in the tropical Pacific Ocean

    E-Print Network [OSTI]

    Eddy mean flow decomposition and eddy diffusivity estimates in the tropical Pacific Ocean: 2] Eddy diffusivity of the surface velocity field in the tropical Pacific Ocean was estimated using diffusivity estimates in the tropical Pacific Ocean: 2. Results, J. Geophys. Res., 107(C10), 3154, doi:10

  16. Regional Patterns of Tropical Indo-Pacific Climate Change: Evidence of the Walker Circulation Weakening*

    E-Print Network [OSTI]

    Xie, Shang-Ping

    in the tropical eastern Pacific and western Indian Ocean than in the tropical western Pacific and eastern IndianRegional Patterns of Tropical Indo-Pacific Climate Change: Evidence of the Walker Circulation Weakening* HIROKI TOKINAGA, SHANG-PING XIE, AND AXEL TIMMERMANN International Pacific Research Center, SOEST

  17. Recent widening of the tropical belt from global tropopause statistics: Sensitivities

    E-Print Network [OSTI]

    Birner, Thomas

    Recent widening of the tropical belt from global tropopause statistics: Sensitivities Thomas Birner 2010. [1] Several recent studies have shown evidence for a widening of the tropical belt over the past of the resulting widening trend of the tropical belt to these thresholds is investigated using four different

  18. Uncertainty in Simulating Wheat Yields Under Climate Change

    SciTech Connect (OSTI)

    Asseng, S.; Ewert, F.; Rosenzweig, C.; Jones, J.W.; Hatfield, Jerry; Ruane, Alex; Boote, K. J.; Thorburn, Peter; Rotter, R.P.; Cammarano, D.; Brisson, N.; Basso, B.; Martre, P.; Aggarwal, P.K.; Angulo, C.; Bertuzzi, P.; Biernath, C.; Challinor, AJ; Doltra, J.; Gayler, S.; Goldberg, R.; Grant, Robert; Heng, L.; Hooker, J.; Hunt, L.A.; Ingwersen, J.; Izaurralde, Roberto C.; Kersebaum, K.C.; Mueller, C.; Naresh Kumar, S.; Nendel, C.; O'Leary, G.O.; Olesen, JE; Osborne, T.; Palosuo, T.; Priesack, E.; Ripoche, D.; Semenov, M.A.; Shcherbak, I.; Steduto, P.; Stockle, Claudio O.; Stratonovitch, P.; Streck, T.; Supit, I.; Tao, F.; Travasso, M.; Waha, K.; Wallach, D.; White, J.W.; Williams, J.R.; Wolf, J.

    2013-09-01

    Anticipating the impacts of climate change on crop yields is critical for assessing future food security. Process-based crop simulation models are the most commonly used tools in such assessments1,2. Analysis of uncertainties in future greenhouse gas emissions and their impacts on future climate change has been increasingly described in the literature3,4 while assessments of the uncertainty in crop responses to climate change are very rare. Systematic and objective comparisons across impact studies is difficult, and thus has not been fully realized5. Here we present the largest coordinated and standardized crop model intercomparison for climate change impacts on wheat production to date. We found that several individual crop models are able to reproduce measured grain yields under current diverse environments, particularly if sufficient details are provided to execute them. However, simulated climate change impacts can vary across models due to differences in model structures and algorithms. The crop-model component of uncertainty in climate change impact assessments was considerably larger than the climate-model component from Global Climate Models (GCMs). Model responses to high temperatures and temperature-by-CO2 interactions are identified as major sources of simulated impact uncertainties. Significant reductions in impact uncertainties through model improvements in these areas and improved quantification of uncertainty through multi-model ensembles are urgently needed for a more reliable translation of climate change scenarios into agricultural impacts in order to develop adaptation strategies and aid policymaking.

  19. PACIFIC HIGHLY MIGR ATORY PEL AGIC FISHERIES pacific highly migratory

    E-Print Network [OSTI]

    the Pacific Ocean, from the tropics to temperate latitudes. Many of these fishes routinely travel great highly migratory species throughout the Pacific Ocean. Some of the fleets are capable of operating across the Pacific as well as in other oceans during a single fishing season. These fleets use larger purse

  20. Framework for the determination of yield limits In pharmaceutical operations

    E-Print Network [OSTI]

    Liow, Yuh Han John

    2010-01-01

    The manufacturing production of active pharmaceutical ingredients often involve a series of processing stages in which yield limits are prescribed to ensure that the target yield has been achieved for a batch and that the ...

  1. Efficient vlsi yield prediction with consideration of partial correlations 

    E-Print Network [OSTI]

    Varadan, Sridhar

    2009-05-15

    of the yield prediction problem (thus making it less time complex) without affecting the accuracy in yield. The efficiency of these two approaches is measured by comparing with the results obtained from Monte Carlo simulations. Compared to previous work...

  2. Forest thinning may increase water yield from the Sierra Nevada

    E-Print Network [OSTI]

    Downing, Jim

    2015-01-01

    forests tend to yield more water. Further reading: Bales RC,et al. 2011. Forests and Water in the Sierra Nevada: SierraForest thinning may increase water yield from the Sierra

  3. Estimation of dibaryon (OO) yields at RHIC energies

    E-Print Network [OSTI]

    Zhong-Dao Lu

    2002-07-02

    The yields of dibaryon (Omega-Omega) in relativistic heavy ion collisions, especially at RHIC energies, are estimated by statistical model. The yields of hyperon Omega- and the ratio of dibaryon to Omega are also given.

  4. Systemsize dependence of associated yields in hadron-triggered jets

    E-Print Network [OSTI]

    Abelev, Betty

    2010-01-01

    in hadron-triggered jets B.I.Abelev (STARCollaboration)yields in hadron-triggered jets B. I. Abelev 8 , M. M.+Au collisions reveal similar jet-like correlation yields at

  5. Increasing carbon storage in intact African tropical forests

    E-Print Network [OSTI]

    Malhi, Yadvinder

    to predictions of future levels of atmospheric carbon dioxide1,2 . The role of tropical forests is critical dioxide concentrations, may be the cause of the increase in carbon stocks13 , as some theory14 and models2 with estimates of fossil fuel emissions, ocean carbon fluxes and carbon released from land-use change, indicate

  6. WMO/CAS/WWW SEVENTH INTERNATIONAL WORKSHOP ON TROPICAL CYCLONES

    E-Print Network [OSTI]

    Smith, Roger K.

    .smith@lmu.de Working Group Members: Zhuo Wang (Univ. Illinois, USA), David Raymond (New Mexico Tech., New Mexico, USA (i.e. thunderstorm activity) and a definite cyclonic surface wind circulation (Holland 1993)." Notably, this definition does not invoke any wind threshold. The same glossary defines a tropical

  7. Reduction of tropical land region precipitation variability via transpiration

    E-Print Network [OSTI]

    Gentine, Pierre

    plants through open stomata: this process (transpiration) cools the plant and facilitates transportReduction of tropical land region precipitation variability via transpiration Jung-Eun Lee,1 in observations and models. In the present study, the potential role of transpiration for this difference

  8. In Situ Survival of Genetically Engineered Microorganisms in a Tropical

    E-Print Network [OSTI]

    Hazen, Terry

    . Alvarez, G. M. Yumet, and C. L. Santiago Department of Biology, P.O. Box 23360, University of Puerto Rico, Rio Piedras, Puerto Rico 00931-3360 T. C. Hazen Savannah River Laboratory, Environmental Sciences microorganisms (GEMs) and their interactions with the environmental microbiota of a tropical river

  9. MET 416: TROPICAL ANALYSIS AND FORECASTING Spring Semester 2013

    E-Print Network [OSTI]

    current (nowcasting) and expected weather, using all available real-time operational weather data Exam 4/9 Summer trade-wind weather based on HaRP 4/11-16 Large-scale influences, Diurnal cycle to the development of tropical storm systems and mesoscale weather. Lectures will include a forecasting perspective

  10. Hybrid coupled models of the tropical Pacific: I interannual variability

    E-Print Network [OSTI]

    Tang, Youmin

    Y. Tang Hybrid coupled models of the tropical Pacific: I interannual variability Received: 20 Two hybrid coupled models (HCMs), an intermediate complexity dynamical ocean model cou- pled to either), hybrid models (e.g., Barnett et al. 1993; Balmaseda et al. 1994,1995), and fully coupled general

  11. Tropical Pacific mid-latitude teleconnections in medieval times

    E-Print Network [OSTI]

    Cobb, Kim

    records from widely distributed regions around the planet, and in many cases is consistent with a cool centennial-scale drought, elevated incidence of wild fire, cool sea surface temperatures (SSTs) along). Proxy records from the tropical Pacific Ocean show contemporaneous changes indicating cool central

  12. The efficiency of diabatic heating and tropical cyclone intensification

    E-Print Network [OSTI]

    Smith, Roger K.

    The efficiency of diabatic heating and tropical cyclone intensification Roger K. Smitha and Michael cyclones to the increasing "efficiency" of diabatic heating in the cyclone's inner core region associated with deep convection. The efficiency, in essence the amount of temperature warming compared to the amount

  13. Tropical geometry of statistical models Lior Pachter and Bernd Sturmfels

    E-Print Network [OSTI]

    Marcolli, Matilde

    for graphical models in statistical learning theory (5), but it differs from other (more classical) notionsTropical geometry of statistical models Lior Pachter and Bernd Sturmfels Department of Mathematics, University of California, Berkeley, CA 94720 Communicated by Stephen E. Fienberg, Carnegie Mellon University

  14. Southern Hemisphere Additional Ozonesondes (SHADOZ) 19982000 tropical ozone climatology

    E-Print Network [OSTI]

    Thompson, Anne

    Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998­2000 tropical ozone climatology 1. Comparison with Total Ozone Mapping Spectrometer (TOMS) and ground-based measurements Anne M. Thompson,1 Additional Ozonesondes (SHADOZ) project and established from operational sites, provided over 1000 ozone

  15. Geochronology of Quaternary glaciations from the tropical Cordillera Huayhuash, Peru

    E-Print Network [OSTI]

    Mark, Bryan G.

    Geochronology of Quaternary glaciations from the tropical Cordillera Huayhuash, Peru Sarah R. Hall to peaks >4800 m a.s.l. Geomorphology and geochronology in the nearby Cordillera Blanca and Junin Plain et al., 2005a, b) and thus completes a north-south glacial geochronologic transect spanning w1

  16. AGCM Precipitation Biases in the Tropical Atlantic M. BIASUTTI

    E-Print Network [OSTI]

    Biasutti, Michela

    AGCM Precipitation Biases in the Tropical Atlantic M. BIASUTTI Lamont-Doherty Earth Observatory precipitation in the Southern Hemisphere in boreal spring and in the Caribbean region in boreal summer precipitation maximum does not occur there. This is the case even though these GCMs accurately place the maximum

  17. Method and apparatus for sampling low-yield wells

    DOE Patents [OSTI]

    Last, George V. (Richland, WA); Lanigan, David C. (Kennewick, WA)

    2003-04-15

    An apparatus and method for collecting a sample from a low-yield well or perched aquifer includes a pump and a controller responsive to water level sensors for filling a sample reservoir. The controller activates the pump to fill the reservoir when the water level in the well reaches a high level as indicated by the sensor. The controller deactivates the pump when the water level reaches a lower level as indicated by the sensors. The pump continuously activates and deactivates the pump until the sample reservoir is filled with a desired volume, as indicated by a reservoir sensor. At the beginning of each activation cycle, the controller optionally can select to purge an initial quantity of water prior to filling the sample reservoir. The reservoir can be substantially devoid of air and the pump is a low volumetric flow rate pump. Both the pump and the reservoir can be located either inside or outside the well.

  18. Possible linkages between Saharan dust and tropical cyclone rain band invigoration in the eastern Atlantic during NAMMA-06

    E-Print Network [OSTI]

    Rutledge, Steven

    for tropical cyclogenesis, it also provides an infusion of cloud condensation and ice nuclei which can

  19. To study of different level of nitrogen manure and density on yield and yield component of variety of K.S.C 704 in dry region of sistan

    SciTech Connect (OSTI)

    Dahmardeh, M.; Forghani, F.; Khammari, E. [Department of Agronomy, Plant breeding and genetic, Faculty of Agricutlure, Zabol University (Iran, Islamic Republic of)

    2008-01-30

    Out of three grain of the world, Corn is one of the best, About 7 to 10 thousand years ago in south of Mexico corn become domesticated. In the year 1995 culfivation of corn in the world was 130 mil/ha, and to Total production of the world of corn is 507 M/Tons. Average yield of corn in the year 1995 Among Producer countries was 7.78 To 7.60 t/ha in fance and united state was state was 2.36 To 2.20 t/ha, but in Brazil and Mexico Production of corn was different. With this regards, special manner has been arranged for the suitable cultivation or suitable density plants in one heactar on cultivation variety of K.S.C 704 corn. Also suitable level of Nitrogen manure, this Protect in climatic condition of Sistan region done, sith complete block design with 3 replication. Experiment has been selected as split plot, the main plot with 4 different concentration level such as (200-250-3500 and 350 Kg/ha) and sub plot density with 3 different level such as 111000,83000 and 66000 plan/ha respectively. From stage growth up to harvesting of corn in this reache having Data for each treat. ment, After harvesting Analysis of variance and companion of Average of each treatment has been done by DunKan method. Results has been shown, Measurment of characteristics (yield component) seed yield effected different density level of manure, with increasing of manure weight of one thousand seed yield and also in high density showed high significant differente amoung each other. These are with suitable climatic condition of sistan region if enough water will be available ed using Amount of 350 ks/ha Nitrogen manure and with density 111000 plants/ha we can product suitable seed yield Biological yield.

  20. Solvothermal-Assisted Exfoliation Process to Produce Graphene with High Yield and High Quality

    E-Print Network [OSTI]

    Gao, Hongjun

    Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing in previous syntheses to 10 wt% 12 wt%. By means of centrifugation at 2000 rpm for 90 min, monolayer

  1. Asymmetric Yield Function Based on the Stress Invariants for Pressure Sensitive Metals

    SciTech Connect (OSTI)

    Jeong Wahn Yoon; Yanshan Lou; Jong Hun Yoon; Michael V. Glazoff

    2014-05-01

    A general asymmetric yield function is proposed with dependence on the stress invariants for pressure sensitive metals. The pressure sensitivity of the proposed yield function is consistent with the experimental result of Spitzig and Richmond (1984) for steel and aluminum alloys while the asymmetry of the third invariant is preserved to model strength differential (SD) effect of pressure insensitive materials. The proposed yield function is transformed in the space of the stress triaxaility, the von Mises stress and the normalized invariant to theoretically investigate the possible reason of the SD effect. The proposed plasticity model is further extended to characterize the anisotropic behavior of metals both in tension and compression. The extension of the yield function is realized by introducing two distinct fourth-order linear transformation tensors of the stress tensor for the second and third invariants, respectively. The extended yield function reasonably models the evolution of yield surfaces for a zirconium clock-rolled plate during in-plane and through-thickness compression reported by Plunkett et al. (2007). The extended yield function is also applied to describe the orthotropic behavior of a face-centered cubic metal of AA 2008-T4 and two hexagonal close-packed metals of high-purity-titanium and AZ31 magnesium alloy. The orthotropic behavior predicted by the generalized model is compared with experimental results of these metals. The comparison validates that the proposed yield function provides sufficient predictability on SD effect and anisotropic behavior both in tension and compression. When it is necessary to consider r-value anisotropy, the proposed function is efficient to be used with nonassociated flow plasticity by introducing a separate plastic potential for the consideration of r-values as shown in Stoughton & Yoon (2004, 2009).

  2. Improved Yield and Diverse Finished Bacterial Genomes using Pacific Biosciences RS II SMRT Sequencing

    E-Print Network [OSTI]

    Weber, David J.

    Improved Yield and Diverse Finished Bacterial Genomes using Pacific Biosciences RS II SMRT-Cruz, Alvaro Godinez, Luke J. Tallon Institute for Genome Sciences, University of Maryland School of Medicine, effective, and highly accurate platform for generation of complete microbial genome sequences. As early

  3. Realization of Algae Potential Algae Biomass Yield Program

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

    Realization of Algae Potential Algae Biomass Yield Program March 25, 2015 Technology Area Review Peter Lammers, P.I. New Mexico State University -> Arizona State University This...

  4. Collaboration yields 'The Right Glasses' for observing mystery...

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

    Observing mystery behavior In electrons Collaboration yields 'The Right Glasses' for observing mystery behavior in electrons The research may lead to a better understanding of...

  5. VERIFI code optimization yields three-fold increase in engine...

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

    for parallel readwrite processes. (Click image to view larger.) VERIFI code optimization yields three-fold increase in engine simulation speed By Greg Cunningham * May 7,...

  6. Structures for Three Membrane Transport Proteins Yield Functional...

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

    Structures for Three Membrane Transport Proteins Yield Functional Insights Print Cells depend on contact with their outside environment in order to thrive. Two examples illustrate...

  7. Solar Decathlon house continues to yield data | ornl.gov

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

    Solar Decathlon house continues to yield data ORNL, University of Tennessee to continue lessons learned in DOE solar energy competition Courtesy of: UT College of Architecture and...

  8. Weather-based yield forecasts developed for 12 California crops

    E-Print Network [OSTI]

    Lobell, David; Cahill, Kimberly Nicholas; Field, Christopher

    2006-01-01

    RESEARCH ARTICLE Weather-based yield forecasts developed fordepend largely on the weather, measurements from existingpredictions. We developed weather-based models of statewide

  9. Increasing Sugar Yields with IL-final-sm

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

    Ionic Liquid Processing Increasing sugar yields from diverse biomass feedstock with ionic liquid processing and cultivation of renewable ionic liquids Liberating Sugars from...

  10. Calculated fission-fragment yield systematics in the region 74

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

    Möller, Peter; Randrup, Jørgen

    2015-04-01

    Background: In the seminal experiment by Schmidt et al. [Nucl. Phys. A 665, 221 (2000)] in which fission-fragment charge distributions were obtained for 70 nuclides, asymmetric distributions were seen above nucleon number A ? 226 and symmetric ones below. Because asymmetric fission had often loosely been explained as a preference for the nucleus to always exploit the extra binding of fragments near ¹³²Sn it was assumed that all systems below A ? 226 would fission symmetrically because available isotopes do not have a proton-to-neutron Z/N ratio that allows division into fragments near ¹³²Sn. But the finding by Andreyev et al.more »[Phys. Rev. Lett. 105, 252502 (2010)] did not conform to this expectation because the compound system ¹??Hg was shown to fission asymmetrically. It was suggested that this was a new type of asymmetric fission, because no strong shell effects occur for any possible fragment division. Purpose: We calculate a reference database for fission-fragment mass yields for a large region of the nuclear chart comprising 987 nuclides. A particular aim is to establish whether ¹??Hg is part of a contiguous region of asymmetric fission, and if so, its extent, or if not, in contrast to the actinides, there are scattered smaller groups of nuclei that fission asymmetrically in this area of the nuclear chart. Methods: We use the by now well benchmarked Brownian shape-motion method and perform random walks on the previously calculated five-dimensional potential-energy surfaces. The calculated shell corrections are damped out with energy according to a prescription developed earlier. Results: We have obtained a theoretical reference database of fission-fragment mass yields for 987 nuclides. These results show an extended region of asymmetric fission with approximate extension 74 ? Z ? 85 and 100 ? N ? 120. The calculated yields are highly variable. We show 20 representative plots of these variable features and summarize the main aspects of our results in terms of “nuclear-chart” plots showing calculated degrees of asymmetry versus N and Z. Conclusions: Experimental data in this region are rare: only ten or so yield distributions have been measured, some with very limited statistics. We agree with several measurements with higher statistics. Regions where there might be differences between our calculated results and measurements lie near the calculated transition line between symmetric and asymmetric fission. To draw more definite conclusions about the accuracy of the present implementation of the Brownian shape-motion approach in this region experimental data, with reliable statistics, for a fair number of suitably located additional nuclides are clearly needed. Because the nuclear potential-energy structure is so different in this region compared to the actinide region, additional experimental data together with fission theory studies that incorporate additional, dynamical aspects should provide much new insight.« less

  11. Influence of Cropping Systems On Cotton and Corn Yields on the Gulf Coast Prairie. 

    E-Print Network [OSTI]

    Jeter, B. E.; Smith, J. C.; Whiteley, E. L.

    1962-01-01

    and better stands of cotton were obtained. The main disadvantage of this system was that two planting operations a year were re- quired. Cropping systems containing Dallisgrass and White clover are more highly recommended than all other systems tested... clover can cause bloat in cattle; (3) 2 years are needed to obtain high forage yields and (4) it is difficult to obtain a good seedbed for corn or cotton when the land goes out of forage production. Dallisgrass and White clover produced higher...

  12. Conceptual design of a tropical cyclone UAV based on the AR-6 Endeavor aircraft

    E-Print Network [OSTI]

    Poh, Chung-Kiak; Yeh, Mei-Ling; Chou, Tien-Yin

    2014-01-01

    This paper reports on the preliminary simulation work for a 1-meter class tropical cyclone UAV (unmanned aerial vehicle) based on the Formula-One AR-6 Endeavor full-sized airplane. Variants with different wing span are evaluated using the popular RealFlight radio-control simulator. The 84 cm wing-span platform achieves a maximum cruising speed (Vh) of 407 kmh-1 and demonstrates responsive flight controls throughout its flight envelope even in sustained wind speed of 225 kmh-1. Being a small and agile UAV, it can be flown below the storm to measure surface wind directly and avoid possible uncertainty associated with the vertical wind profile adjustment. Chute-free vertical retardation technique is also proposed. The ultimate aim of the research is to develop cost effective UAVs that can be employed in a multi-agent setting to acquire high resolution data to enhance understanding of cyclogenesis and to make better predictions.

  13. Elaboration of global quality standards for natural and low energy cooling in French tropical island buildings

    E-Print Network [OSTI]

    Garde, F; Gatina, J C

    2012-01-01

    Electric load profiles of tropical islands in developed countries are characterised by morning, midday and evening peaks arising from all year round high power demand in the commercial and residential sectors, due mostly to air conditioning appliances and bad thermal conception of the building. The work presented in this paper has led to the conception of a global quality standards obtained through optimized bioclimatic urban planning and architectural design, the use of passive cooling architectural components, natural ventilation and energy efficient systems such as solar water heaters. We evaluated, with the aid of an airflow and thermal building simulation software (CODYRUN), the impact of each technical solution on thermal comfort within the building. These technical solutions have been implemented in 280 new pilot dwelling projects through the year 1996.

  14. The iron nutrition of tropical foliage plants 

    E-Print Network [OSTI]

    Lang, Harvey Joe

    1986-01-01

    concentrations than green leaves, but the chlorotic leaves also had highez P concentrations. DeKock and Strmecki (45), studying the growth- promoting effect of a lignite, noted the significance of P in comparison with Fe. They found that in mustard a high P/Fe.... This hypothesis was supported by work by DeKock et al. (46) in which a very significant linear relationship was found between the active Fe fraction and the ratio of total P to total Fe. These relationships give meaningful differences between chlorotic...

  15. Reduced impact logging minimally alters tropical rainforest carbon and energy exchange

    E-Print Network [OSTI]

    2011-01-01

    variations in energy and carbon exchange over forest andon tropical forest carbon, water, and energy exchange. Twothe role of forest in the water and energy cycles and

  16. Tropical Storm Frances Situation Report, September 6, 2004 (10:00 AM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-06

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  17. Tropical Storm Frances Situation Report, September 6, 2004 (10:00 PM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-06

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  18. Tropical Storm Frances Situation Report, September 6, 2004 (4:00 PM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-06

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  19. Tropical Storm Frances Situation Report, September 7, 2004 (10:00 AM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-07

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  20. Tropical Storm Frances Situation Report, September 7, 2004 (4:00 PM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-07

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  1. Characterization of trapped lignin-degrading microbes in tropical forest soil

    E-Print Network [OSTI]

    DeAngelis, K.M.

    2012-01-01

    of trapped lignin-degrading microbes in tropical forest soilunseen majority: soil microbes as drivers of plant diversitya challenge for soil microbes and biofuels engineers alike.

  2. Holocene hydrologic balance of tropical South America from oxygen isotopes of lake sediment opal, Venezuelan Andes

    E-Print Network [OSTI]

    Wolfe, Alexander P.

    Holocene hydrologic balance of tropical South America from oxygen isotopes of lake sediment opal.V. All rights reserved. Keywords: oxygen isotopes; biogenic opal; hydrologic balance; Holocene; Venezuela

  3. Testing actinide fission yield treatment in CINDER90 for use in MCNP6 burnup calculations

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

    Fensin, Michael Lorne; Umbel, Marissa

    2015-09-18

    Most of the development of the MCNPX/6 burnup capability focused on features that were applied to the Boltzman transport or used to prepare coefficients for use in CINDER90, with little change to CINDER90 or the CINDER90 data. Though a scheme exists for best solving the coupled Boltzman and Bateman equations, the most significant approximation is that the employed nuclear data are correct and complete. Thus, the CINDER90 library file contains 60 different actinide fission yields encompassing 36 fissionable actinides (thermal, fast, high energy and spontaneous fission). Fission reaction data exists for more than 60 actinides and as a result, fissionmore »yield data must be approximated for actinides that do not possess fission yield information. Several types of approximations are used for estimating fission yields for actinides which do not possess explicit fission yield data. The objective of this study is to test whether or not certain approximations of fission yield selection have any impact on predictability of major actinides and fission products. Further we assess which other fission products, available in MCNP6 Tier 3, result in the largest difference in production. Because the CINDER90 library file is in ASCII format and therefore easily amendable, we assess reasons for choosing, as well as compare actinide and major fission product prediction for the H. B. Robinson benchmark for, three separate fission yield selection methods: (1) the current CINDER90 library file method (Base); (2) the element method (Element); and (3) the isobar method (Isobar). Results show that the three methods tested result in similar prediction of major actinides, Tc-99 and Cs-137; however, certain fission products resulted in significantly different production depending on the method of choice.« less

  4. Testing actinide fission yield treatment in CINDER90 for use in MCNP6 burnup calculations

    SciTech Connect (OSTI)

    Fensin, Michael Lorne; Umbel, Marissa

    2015-09-18

    Most of the development of the MCNPX/6 burnup capability focused on features that were applied to the Boltzman transport or used to prepare coefficients for use in CINDER90, with little change to CINDER90 or the CINDER90 data. Though a scheme exists for best solving the coupled Boltzman and Bateman equations, the most significant approximation is that the employed nuclear data are correct and complete. Thus, the CINDER90 library file contains 60 different actinide fission yields encompassing 36 fissionable actinides (thermal, fast, high energy and spontaneous fission). Fission reaction data exists for more than 60 actinides and as a result, fission yield data must be approximated for actinides that do not possess fission yield information. Several types of approximations are used for estimating fission yields for actinides which do not possess explicit fission yield data. The objective of this study is to test whether or not certain approximations of fission yield selection have any impact on predictability of major actinides and fission products. Further we assess which other fission products, available in MCNP6 Tier 3, result in the largest difference in production. Because the CINDER90 library file is in ASCII format and therefore easily amendable, we assess reasons for choosing, as well as compare actinide and major fission product prediction for the H. B. Robinson benchmark for, three separate fission yield selection methods: (1) the current CINDER90 library file method (Base); (2) the element method (Element); and (3) the isobar method (Isobar). Results show that the three methods tested result in similar prediction of major actinides, Tc-99 and Cs-137; however, certain fission products resulted in significantly different production depending on the method of choice.

  5. Effect of neutron composition and excitation energy on the primary fragment yield distribution in multifragmentation reaction

    E-Print Network [OSTI]

    D. V. Shetty; A. S. Botvina; S. J. Yennello; G. A. Souliotis; E. Bell; A. Keksis

    2004-09-23

    The isotopic properties of the primary and secondary fragment yield distribution in the multifragmentation of $^{58}$Fe + $^{58}$Ni and $^{58}$Fe + $^{58}$Fe reactions are studied with respect to the $^{58}$Ni + $^{58}$Ni reaction at 30, 40 and 47 MeV/nucleon. The reduced neutron and proton densities from the observed fragment yield distribution show primary fragment yield distribution to undergo strongly secondary de-excitations. The effect is small at the lowest excitation energy and smallest neutron-to-proton ratio and becomes large at higher excitation energies and higher neutron-to-proton ratio. The symmetry energy of the primary fragments deduced from the reduced neutron density is significantly lower than that for the normal nuclei at saturation density, indicating that the fragments are highly excited and formed at a reduced density. Furthermore, the symmetry energy is also observed to decrease slowly with increasing excitation energy. The observed effect is explained using the statistical multifragmentation model.

  6. Measurements of barium photocathode quantum yields at four excimer laser wavelengths

    SciTech Connect (OSTI)

    Van Loy, M.D.; Young, A.T.; Leung, K.N. (Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States))

    1993-07-26

    The electron quantum yields from barium cathodes excited by excimer laser radiation at 193, 248, 308, and 351 nm have been determined. Experiments with different cathode surface preparation techniques reveal that deposition of barium film a few microns thick on a clean copper surface under moderate vacuum conditions achieves relatively high quantum efficiencies. Quantum yields measured from surfaces prepared in this manner are 2.3[times]10[sup [minus]3] at 193 nm, 7.6[times]10[sup [minus]4] at 248 nm, 6.1[times]10[sup [minus]4] at 308 nm, and 4.0[times]10[sup [minus]4] at 351 nm. Other preparation techniques, such as laser cleaning of a solid barium surface, produced quantum yields that were at least an order of magnitude lower than these values.

  7. CONVENIENCE YIELD MODEL WITH PARTIAL OBSERVATIONS AND EXPONENTIAL UTILITY

    E-Print Network [OSTI]

    Carmona, Rene

    CONVENIENCE YIELD MODEL WITH PARTIAL OBSERVATIONS AND EXPONENTIAL UTILITY REN´E CARMONA AND MICHAEL. We study the value function corresponding to utility pric- ing with exponential utility. Assuming of the full information case. convenience yield, filtering, partial observations, stochastic control, utility

  8. Magnetorheology in an aging, yield stress matrix fluid

    E-Print Network [OSTI]

    et al. 2001), precision polishing (Kordonski and Golini 1999), and drilling fluids (Zitha 2004). MR1 Magnetorheology in an aging, yield stress matrix fluid Jason P. Rich,a Patrick S. Doyle,a Gareth) suspensions in an aging, yield stress matrix fluid composed of an aqueous dispersion of Laponite® clay. Using

  9. TOWARDS STANDARDIZATION OF CSP YIELD ASSESSMENTS Richard Meyer

    E-Print Network [OSTI]

    Heinemann, Detlev

    TOWARDS STANDARDIZATION OF CSP YIELD ASSESSMENTS Richard Meyer 1 , Hans Georg Beyer 2 , Jörg. In the field of concentrating solar power (CSP) standardized procedures for the assessment of energy yields funding for CSP. Other technologies such as wind energy or photovoltaics have already implemented many

  10. The Start Of Ebullition In Quiescent, Yield-Stress Fluids

    SciTech Connect (OSTI)

    Reed, G. R.; Sherwood, David J.; Saez, A. Eduardo

    2012-08-30

    Non-Newtonian rheology is typical for the high-level radioactive waste (HLW) slurries processed in the Hanford Tank Waste Treatment and Immobilization Plant (WTP). Hydrogen and other flammable gases are generated in the aqueous phase by radiolytic and chemical reactions. HLW slurries have a capacity for retaining gas characterized by the shear strength holding the bubbles still. The sizes and degassing characteristics of flammable gas bubbles in the HLW slurries expected to be processed by the WTP are important considerations for designing equipment and operating procedures. Slurries become increasingly susceptible to degassing as the bubble concentration increases. This susceptibility and the process of ebullitive bubble enlargement are described here. When disturbed, the fluid undergoes localized flow around neighboring bubbles which are dragged together and coalesce, producing an enlarged bubble. For the conditions considered in this work, bubble size increase is enough to displace the weight required to overcome the fluid shear strength and yield the surroundings. The buoyant bubble ascends and accumulates others within a zone of influence, enlarging by a few orders of magnitude. This process describes how the first bubbles appear on the surface of a 7 Pa shear strength fluid a few seconds after being jarred.

  11. Improved InGaN epitaxy yield by precise temperature measurement :yearly report 1.

    SciTech Connect (OSTI)

    Koleske, Daniel David; Creighton, James Randall; Russell, Michael J.; Fischer, Arthur Joseph

    2006-08-01

    This Report summarizes the first year progress (October 1, 2004 to September 30, 2005) made under a NETL funded project entitled ''Improved InGaN Epitaxy Yield by Precise Temperature Measurement''. This Project addresses the production of efficient green LEDs, which are currently the least efficient of the primary colors. The Project Goals are to advance IR and UV-violet pyrometry to include real time corrections for surface emissivity on multiwafer MOCVD reactors. Increasing wafer yield would dramatically reduce high brightness LED costs and accelerate the commercial manufacture of inexpensive white light LEDs with very high color quality. This work draws upon and extends our previous research (funded by DOE) that developed emissivity correcting pyrometers (ECP) based on the high-temperature GaN opacity near 400 nm (the ultraviolet-violet range, or UVV), and the sapphire opacity in the mid-IR (MIR) near 7.5 microns.

  12. The yielding of concentrated cohesive suspensions can be deformation rate dependent

    E-Print Network [OSTI]

    Richard Buscall; Peter J. Scales; Anthony D. Stickland; Hui-En Teo; Tiara E. Kusuma; Sayuri Rubasingha; Daniel R. Lester

    2014-10-08

    The yielding of concentrated cohesive suspensions can be deformation-rate dependent. One consquence of this is that a single suspension can present in one several different ways, depending upon how it is tested, or more generally, how it is caused to flow. We have seen variously Herschel-Bulkley flow, highly non-monotonic flow curves and highly erratic or chaotic yield, all in one suspension. In controlled-rate testing one sees a systematic effect of deformation rate. In controlled stress testing, matters are more subtle. Whereas step-stress creep testing will elicit reproducible behaviour, any attempt to determine a flow curve by, e.g. stepping up or sweeping stress at an inappropriate rate can lead to highly irreproducible behaviour.

  13. Changes in diurnal temperature range and national cereal yields

    SciTech Connect (OSTI)

    Lobell, D

    2007-04-26

    Models of yield responses to temperature change have often considered only changes in average temperature (Tavg), with the implicit assumption that changes in the diurnal temperature range (DTR) can safely be ignored. The goal of this study was to evaluate this assumption using a combination of historical datasets and climate model projections. Data on national crop yields for 1961-2002 in the 10 leading producers of wheat, rice, and maize were combined with datasets on climate and crop locations to evaluate the empirical relationships between Tavg, DTR, and crop yields. In several rice and maize growing regions, including the two major nations for each crop, there was a clear negative response of yields to increased DTR. This finding reflects a nonlinear response of yields to temperature, which likely results from greater water and heat stress during hot days. In many other cases, the effects of DTR were not statistically significant, in part because correlations of DTR with other climate variables and the relatively short length of the time series resulted in wide confidence intervals for the estimates. To evaluate whether future changes in DTR are relevant to crop impact assessments, yield responses to projected changes in Tavg and DTR by 2046-2065 from 11 climate models were estimated. The mean climate model projections indicated an increase in DTR in most seasons and locations where wheat is grown, mixed projections for maize, and a general decrease in DTR for rice. These mean projections were associated with wide ranges that included zero in nearly all cases. The estimated impacts of DTR changes on yields were generally small (<5% change in yields) relative to the consistently negative impact of projected warming of Tavg. However, DTR changes did significantly affect yield responses in several cases, such as in reducing US maize yields and increasing India rice yields. Because DTR projections tend to be positively correlated with Tavg, estimates of yields under extreme warming scenarios were particularly affected by including DTR (up to 10%). Finally, based on the relatively poor performance of climate models in reproducing the magnitude of past DTR trends, it is possible that future DTR changes and associated yield responses will exceed the ranges considered here.

  14. Development of Yield and Tensile Strength Design Curves for Alloy 617

    SciTech Connect (OSTI)

    Nancy Lybeck; T. -L. Sham

    2013-10-01

    The U.S. Department of Energy Very High Temperature Reactor Program is acquiring data in preparation for developing an Alloy 617 Code Case for inclusion in the nuclear section of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (B&PV) Code. A draft code case was previously developed, but effort was suspended before acceptance by ASME. As part of the draft code case effort, a database was compiled of yield and tensile strength data from tests performed in air. Yield strength and tensile strength at temperature are used to set time independent allowable stress for construction materials in B&PV Code, Section III, Subsection NH. The yield and tensile strength data used for the draft code case has been augmented with additional data generated by Idaho National Laboratory and Oak Ridge National Laboratory in the U.S. and CEA in France. The standard ASME Section II procedure for generating yield and tensile strength at temperature is presented, along with alternate methods that accommodate the change in temperature trends seen at high temperatures, resulting in a more consistent design margin over the temperature range of interest.

  15. Tropical Africa: Land use, biomass, and carbon estimates for 1980

    SciTech Connect (OSTI)

    Brown, S.; Gaston, G.; Daniels, R.C.

    1996-06-01

    This document describes the contents of a digital database containing maximum potential aboveground biomass, land use, and estimated biomass and carbon data for 1980 and describes a methodology that may be used to extend this data set to 1990 and beyond based on population and land cover data. The biomass data and carbon estimates are for woody vegetation in Tropical Africa. These data were collected to reduce the uncertainty associated with the possible magnitude of historical releases of carbon from land use change. Tropical Africa is defined here as encompassing 22.7 x 10{sup 6} km{sup 2} of the earth`s land surface and includes those countries that for the most part are located in Tropical Africa. Countries bordering the Mediterranean Sea and in southern Africa (i.e., Egypt, Libya, Tunisia, Algeria, Morocco, South Africa, Lesotho, Swaziland, and Western Sahara) have maximum potential biomass and land cover information but do not have biomass or carbon estimate. The database was developed using the GRID module in the ARC/INFO{sup TM} geographic information system. Source data were obtained from the Food and Agriculture Organization (FAO), the U.S. National Geophysical Data Center, and a limited number of biomass-carbon density case studies. These data were used to derive the maximum potential and actual (ca. 1980) aboveground biomass-carbon values at regional and country levels. The land-use data provided were derived from a vegetation map originally produced for the FAO by the International Institute of Vegetation Mapping, Toulouse, France.

  16. Yield stress and shear-banding in granular suspensions

    E-Print Network [OSTI]

    Abdoulaye Fall; Francois Bertrand; Guillaume Ovarlez; Daniel Bonn

    2009-07-13

    We study the emergence of a yield stress in dense suspensions of non-Brownian particles, by combining local velocity and concentration measurements using Magnetic Resonance Imaging with macroscopic rheometric experiments. We show that the competition between gravity and viscous stresses is at the origin of the development of a yield stress in these systems at relatively low volume fractions. Moreover, it is accompanied by a shear banding phenomenon that is the signature of this competition. However, if the system is carefully density matched, no yield stress is encountered until a volume fraction of 62.7 0.3%.

  17. Differences Between Tropical and Trade-Wind Shallow Cumuli

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent BondingMeetingDifferences Between Tropical and Trade-Wind Shallow

  18. Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounding Unit: Application to Surface Wind Analysis

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounding Unit: Application to Surface Wind Analysis KOTARO BESSHO Japan Meteorological Agency/Meteorological Research Institute, Tsukuba City winds at 850 hPa from tropical cyclones retrieved using the nonlinear balance equation, where the mass

  19. Estimation of tropical forest structural characteristics using large-footprint lidar

    E-Print Network [OSTI]

    Weishampel, John F.

    Estimation of tropical forest structural characteristics using large-footprint lidar Jason B in identifying the amount of carbon in terrestrial vegetation pools and is central to global carbon cycle studies. Although current remote sensing techniques recover such tropical forest structure poorly, new large-footprint

  20. Geographical distribution and interseasonal variability of tropical deep convection: UARS MLS observations and analyses

    E-Print Network [OSTI]

    Wang, Bin

    of water vapor maxima near the bottom of TTL are located directly above the deep convection centersGeographical distribution and interseasonal variability of tropical deep convection: UARS MLS December 2003; published 13 February 2004. [1] Tropical deep convection and its dynamical effect

  1. Energy dynamics and modeled evapotranspiration from a wet tropical forest in Costa Rica

    E-Print Network [OSTI]

    Energy dynamics and modeled evapotranspiration from a wet tropical forest in Costa Rica H). #12;1. Introduction The energy balance of tropical forests is complex due to feedback mechanisms among.W. Loeschera, *, H.L. Gholza,b , J.M. Jacobsc , S.F. Oberbauerd,e a School of Forest Resources and Conservation

  2. 130 Florida Entomologist 93(1) March 2010 BIOLOGICAL CONTROL OF TROPICAL SODA APPLE

    E-Print Network [OSTI]

    Ma, Lena

    130 Florida Entomologist 93(1) March 2010 BIOLOGICAL CONTROL OF TROPICAL SODA APPLE (SOLANACEAE for natural ene- mies of the invasive plant tropical soda apple, Solanum viarum Dunal (Solanaceae) were con apple in Brazil and Paraguay (Medal et al. 1996). A biological control program was initiated

  3. A Climatology of Tropical Anvil and Its Relationship to the Large-Scale Circulation 

    E-Print Network [OSTI]

    Li, Wei

    2011-02-22

    of anvil formation, and to provide a more realistic assessment of the radiative impact of tropical anvil on the large-scale circulation. Based on 10 years (1998-2007) of observations, anvil observed by the Tropical Rainfall Measuring Mission (TRMM...

  4. Stem respiration in tropical forests along an elevation gradient in the Amazon and Andes

    E-Print Network [OSTI]

    Malhi, Yadvinder

    Stem respiration in tropical forests along an elevation gradient in the Amazon and Andes A M A N D metabolism, resulting in the release of carbon dioxide as a by-product. Little is known of how autotrophic respiration components vary across environmental gradients, particularly in tropical ecosystems. Here, we

  5. Effects of ozone cooling in the tropical lower stratosphere and upper troposphere

    E-Print Network [OSTI]

    Effects of ozone cooling in the tropical lower stratosphere and upper troposphere Piers M. Forster lower stratosphere and upper troposphere and elucidate the key role of ozone changes in driving of tropical ozone decreases at 70 hPa and lower pressures can lead to significant cooling not only

  6. Intermediate Zonal Jets in the Tropical Pacific Ocean Observed by Argo Floats* SOPHIE CRAVATTE

    E-Print Network [OSTI]

    Boyer, Edmond

    Intermediate Zonal Jets in the Tropical Pacific Ocean Observed by Argo Floats* SOPHIE CRAVATTE´veloppement, LEGOS, Toulouse, France WILLIAM S. KESSLER National Oceanic and Atmospheric Administration/Pacific Argo float data in the tropical Pacific Ocean during January 2003­August 2011 are analyzed to obtain

  7. Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman

    E-Print Network [OSTI]

    Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman NOAA Michael McPhaden, chairman of the Tropical Moored Buoy Implementation Panel (TIP), briefed the panel on three topics: 1) the current successes of the TAO/TRITON partnership in maintaining the moored buoy

  8. U.S Markets for Certified and Non-Certified Hardwood Tropical Forest Products

    E-Print Network [OSTI]

    in the fact that tropical forests have a longer growing period, hence encouraging the paper industry to use tropical hardwood pulp for paper production (U.S. and International Institutions 1983). In 2000, the United Agricultural Center Baton Rouge, Louisiana Louisiana Forest Products Development Center Working Paper #76

  9. Auritella foveata, a new species of Inocybaceae (Agaricales) from tropical India

    E-Print Network [OSTI]

    Matheny, P. Brandon

    Auritella foveata, a new species of Inocybaceae (Agaricales) from tropical India P. Brandon Matheny & Matheny is described as new from mixed evergreen forests in tropical India. The species is distinctive due, systematics. Introduction India is exceedingly rich in fungal diversity (Manoharachary et al. 2005). Indeed

  10. THE EXTENT AND CAUSES OF ILLEGAL LOGGING: AN ANALYSIS OF A MAJOR CAUSE OF TROPICAL

    E-Print Network [OSTI]

    THE EXTENT AND CAUSES OF ILLEGAL LOGGING: AN ANALYSIS OF A MAJOR CAUSE OF TROPICAL DEFORESTATION;2 THE EXTENT AND CAUSES OF ILLEGAL LOGGING: AN ANALYSIS OF A MAJOR CAUSE OF TROPICAL DEFORESTATION IN INDONESIA (CIFOR). ISSN 0967-8875 #12;3 Abstract: This paper considers the scale and underlying causes of recent

  11. Cloud properties and associated radiative heating rates in the tropical western Pacific

    E-Print Network [OSTI]

    Cloud properties and associated radiative heating rates in the tropical western Pacific James H radiative fluxes and heating rates. Maxima in cloud occurrence are found in the boundary layer and the upper radiative heating rates in the tropical western Pacific, J. Geophys. Res., 112, D05201, doi:10.1029/2006JD

  12. Tropical ozone as an indicator of deep convection Ian Folkins and Christopher Braun

    E-Print Network [OSTI]

    Folkins, Ian

    Tropical ozone as an indicator of deep convection Ian Folkins and Christopher Braun Department] The climatological ozone profile in the tropics is shaped like an ``S,'' with a minimum at the surface, a maximum. These features can be reproduced by a very simple model whose only free parameter is the mean ozone mixing ratio

  13. Tropical timber import export Africa Asia volume Congo India Nigeria Papua New Guinea & the Solomon Islands

    E-Print Network [OSTI]

    Tropical timber import export Africa Asia volume Congo India Nigeria Papua New Guinea & the Solomon/14/2008 12:55:54 PM] #12;Tropical timber import export Africa Asia volume Congo India Nigeria Volume ('000 m3 import export Africa Asia volume Congo India Nigeria Papua New Guinea Reports (commissioned

  14. An overview of coupled GCM biases in the tropics Ingo Richter1,2

    E-Print Network [OSTI]

    tropical South America and un- derpredict it over tropical Africa. Despite cold SST biases over much), excessive shortwave solar radiation due to insufficient low- level cloud, and weak oceanic stratification biases affect seasonal forecasts and climate change projections, in order to maximize their utility

  15. Shipboard Measurements and Estimations of AirSea Fluxes in the Western Tropical Pacific Ocean

    E-Print Network [OSTI]

    California at Irvine, University of

    Ship­board Measurements and Estimations of Air­Sea Fluxes in the Western Tropical Pacific Ocean E dur­ ing the Tropical Ocean Global Atmosphere (TOGA) Coupled Ocean and Atmospheric Response of the surface­layer turbulence properties are compared with those from previous land and ocean results. Momentum

  16. Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part II: Numerical Simulations*

    E-Print Network [OSTI]

    Wang, Bin

    Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part (1987) and Fiorino and Els- berry (1989) showed that a cyclonic vortex experiences Rossby wave energy) ABSTRACT The cyclogenesis events associated with the tropical cyclone (TC) energy dispersion are simulated

  17. 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

  18. 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

  19. This may come as a surprise, but bigger yields

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

    may come as a surprise, but bigger yields are not always better. Nuclear weapons were generally designed not to be as powerful as possible-but to be as precise as possible. For...

  20. Future Yield Growth: What Evidence from Historical Data?

    E-Print Network [OSTI]

    Gitiaux, Xavier

    The potential future role of biofuels has become an important topic in energy legislation as it is seen as a potential low carbon alternative to conventional fuels. Hence, future yield growth is an important topic from ...

  1. Hierarchy of scales in B{yields}PS decays

    SciTech Connect (OSTI)

    Delepine, D.; Lucio M, J. L.; Mendoza S, J. A.; Ramirez, Carlos A.

    2008-08-31

    We show that the naive factorization approach can accommodate the existence of the observed hierarchy of branching ratios for the B{yields}PS decays (P stands for pseudoscalar and S for scalar mesons respectively.

  2. Yield Enhancement of Reconfigurable Microfluidics-Based Biochips Using

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    Yield Enhancement of Reconfigurable Microfluidics-Based Biochips Using Interstitial Redundancy FEI SU and KRISHNENDU CHAKRABARTY Duke University Microfluidics-based biochips for biochemical analysis cumbersome equipment with minia- turized and integrated systems. As these microfluidics-based microsystems

  3. Plant-Wide Energy Conservation Program Yields Impressive Results 

    E-Print Network [OSTI]

    Adlkes, R. P.; Zupko, A. J.; Adams, J. W.

    1980-01-01

    to heating system and process changes by Installing improved boiler control systems and Initiating operator training programs. ? When rebuilding heat treating equipment, ceramic fiber insulation was used, yielding reduced heat losses and faster...

  4. Proper orthogonal decomposition approach and error estimation of mixed finite element methods for the tropical Pacific Ocean

    E-Print Network [OSTI]

    Navon, Michael

    for the tropical Pacific Ocean reduced gravity model Zhendong Luo a , Jiang Zhu b , Ruiwen Wang b , I.M. Navon c Available online 8 May 2007 Abstract In this paper, the tropical Pacific Ocean reduced gravity model and the insufficient knowledge of air­sea exchange processes. The tropical Pacific Ocean reduced gravity model

  5. Utilization of geothermal heat in tropical fruit-drying process

    SciTech Connect (OSTI)

    Chen, B.H.; Lopez, L.P.; King, R.; Fujii, J.; Tanaka, M.

    1982-10-01

    The power plant utilizes only the steam portion of the HGP-A well production. There are approximately 50,000 pounds per hour of 360/sup 0/F water produced (approximately 10 million Btu per hour) and the water is currently not used and is considered a waste. This tremendous resource could very well be used in applications such as food processing, food dehydration and other industrial processing that requires low-grade heat. One of the applications is examined, namely the drying of tropical fruits particularly the papaya. The papaya was chosen for the obvious reason that it is the biggest crop of all fruits produced on the Big Island. A conceptual design of a pilot plant facility capable of processing 1000 pounds of raw papaya per day is included. This facility is designed to provide a geothermally heated dryer to dehydrate papayas or other tropical fruits available on an experimental basis to obtain data such as drying time, optimum drying temperature, etc.

  6. Inertial Confinement Fusion Ignition and High Yield Campaign The Inertial Confinement Fusion Ignition and High Yield (ICF) Campaign supports the U.S. Department of Energy's (DOE)

    E-Print Network [OSTI]

    , and effective nuclear weapons stockpile without underground testing. It supports stockpile assessment and information are directly applicable to assessing the health of our nuclear weapons and making decisions (SSP) has been developing advanced simulation capabilities to model nuclear weapons with sufficient

  7. Cotton Response to 1-Methylcyclopropene Under Different Light Regimes and Growth Stages: Lint Yield and Yield Components 

    E-Print Network [OSTI]

    Carden, Charles Warren

    2010-10-12

    imposed at four developmental stages of growth: pinhead square (PHS), first flower (FF), peak flower (PF), and boll development (BD). Data pooled over both years indicated that there were no significant differences in yield for 1-MCP treatments; however...

  8. Global climate change and maize production in Spain: Risk assessment and impacts of weather on yields

    SciTech Connect (OSTI)

    Feijoo, M.L.; Mestre, F.; Iglesias, A.; Rosenzweig, C.

    1996-12-31

    The study evaluates the potential effect of climate change on maize production in Spain, combining climate models, a crop productivity model, a decision support system and a yield-response model. The study was carried out for two agricultural regions that include the largest areas of Spain where maize is grown as a high input crop. The paper combines the output from a crop model with different techniques of analysis. The scenarios used in this study were generated from the output of two General Circulation Models (GCMs): the Goddard Institute for Space Studies model (GISS) and the Canadian Climate Change Model (CCCM). The study also includes a preliminary evaluation of the potential changes in monetary returns taking into account the possible variability of grain yields and prices, using mean-Gini stochastic dominance (MGSD). A yield response model was estimated using simulated data from the crop model. Weather variables are included. Typically, temperature and precipitation are the only weather variables included in these models. However, solar radiation is another important climate factor for plant growth and development and were included in the yield response model.

  9. A comparison of silage and grain yields of four corn hybrids at three locations in Texas 

    E-Print Network [OSTI]

    Martelino, Rafael Agcaoili

    1954-01-01

    TABLES Page 20 31 Analysis of variance of silage yields at Temple Analysis of variance of grain yields at Temple . Analysis of varianoe of lodging percentage at Temple. . . ~ 12 o ~ 12 ~ i 13 4, 5 ~ 6, 70 Silage yield, grain yield... and lodging percentage of four oorn bybrids and three spaoings, Temple . Analysis of variance of silage yields at Tyler . Analysis of varianoe of grain yields at Tyler Analysis of variance oi' lodging peroemtage at Tyler 13 16 16 ~ 0 17 Silage yield...

  10. Measurement of neutron yield by 62 MeV proton beam on a thick Beryllium target

    E-Print Network [OSTI]

    R. Alba; M. Barbagallo; P. Boccaccio; A. Celentano; N. Colonna; G. Cosentino; A. Del Zoppo; A. Di Pietro; J. Esposito; P. Figuera; P. Finocchiaro; A. Kostyukov; C. Maiolino; M. Osipenko; G. Ricco; M. Ripani; C. M. Viberti; D. Santonocito; M. Schillaci

    2012-08-08

    In the framework of research on IVth generation reactors and high intensity neutron sources a low-power prototype neutron amplifier was recently proposed by INFN. It is based on a low-energy, high current proton cyclotron, whose beam, impinging on a thick Beryllium converter, produces a fast neutron spectrum. The world database on the neutron yield from thick Beryllium target in the 70 MeV proton energy domain is rather scarce. The new measurement was performed at LNS, covering a wide angular range from 0 to 150 degrees and an almost complete neutron energy interval. In this contribution the preliminary data are discussed together with the proposed ADS facility.

  11. A method for relating impacts with yielding and unyielding targets

    SciTech Connect (OSTI)

    Ammerman, D.J.

    1991-01-01

    The public has questioned the severity of the regulatory 9 meter drop onto an unyielding target required for Type B radioactive material shipping packages since this drop height results in an impact velocity of only 13.3 m/s (30 MPH). It is the unyielding nature of the regulatory target which makes the 9 meter drop so severe. In this paper a method for relating higher velocity impacts with yielding targets to impacts onto an unyielding target is developed. The severity of impacts with yielding targets is decreased by the amount of the impact energy absorbed in damaging the target. There have been previous attempts to correlate impacts with yielding targets to lower velocity impacts onto an unyielding target, and this work is an expansion of those efforts.

  12. A method for relating impacts with yielding and unyielding targets

    SciTech Connect (OSTI)

    Ammerman, D.J.

    1991-12-31

    The public has questioned the severity of the regulatory 9 meter drop onto an unyielding target required for Type B radioactive material shipping packages since this drop height results in an impact velocity of only 13.3 m/s (30 MPH). It is the unyielding nature of the regulatory target which makes the 9 meter drop so severe. In this paper a method for relating higher velocity impacts with yielding targets to impacts onto an unyielding target is developed. The severity of impacts with yielding targets is decreased by the amount of the impact energy absorbed in damaging the target. There have been previous attempts to correlate impacts with yielding targets to lower velocity impacts onto an unyielding target, and this work is an expansion of those efforts.

  13. Management of Philippine tropical forests: Implications to global warming

    SciTech Connect (OSTI)

    Lasco, R.D.

    1997-12-31

    The first part of the paper presents the massive changes in tropical land management in the Philippines as a result of a {open_quotes}paradigm shift{close_quotes} in forestry. The second part of the paper analyzes the impacts of the above management strategies on global warming, in general, preserved forests are neither sinks not sources of greenhouse gasses (GHG). Reforestation activities are primarily net sinks of carbon specially the use of fast growing reforestation species. Estimates are given for the carbon-sequestering ability of some commonly used species. The last part of the paper policy recommendations and possible courses of action by the government to maximize the role of forest lands in the mitigation of global warming. Private sector initiatives are also explored.

  14. Can the vertical motions in the eyewall of tropical cyclones support persistent UAV flight?

    E-Print Network [OSTI]

    Poh, Chung-Kiak

    2014-01-01

    Powered flights in the form of manned or unmanned aerial vehicles (UAVs) have been flying into tropical cyclones to obtain vital atmospheric measurements with flight duration typically lasting between 12 and 36 hours. Convective vertical motion properties of tropical cyclones have previously been studied. This work investigates the possibility to achieve persistent flight by harnessing the generally pervasive updrafts in the eyewall of tropical cyclones. A sailplane UAV capable of vertical take-off and landing (VTOL) is proposed and its flight characteristics simulated. Results suggest that the concept of persistent flight within the eyewall is promising and may be extendable to the rainband regions.

  15. Estimation of neutron-induced spallation yields of krypton isotopes

    SciTech Connect (OSTI)

    Karol, P.J.; Tobin, M.J.; Shibata, S.

    1983-10-01

    A procedure is outlined for estimating cross sections for neutron-induced spallation products relative to those for proton-induced reactions. When combined with known proton spallation systematics, it is demonstrated that cumulative yields for cosmogenically-important stable /sup 84/Kr and /sup 86/Kr isotopes are approx.1.4 and approx.2.8 times greater, respectively, for incident neutrons compared to protons at 0.2< or =E< or =3.0 GeV for nearby medium mass targets. Yields for lighter kryptons are relatively insensitive to the identity of the incident nucleon.

  16. Light propagation and fluorescence quantum yields in liquid scintillators

    E-Print Network [OSTI]

    Buck, C; Wagner, S

    2015-01-01

    For the simulation of the scintillation and Cherenkov light propagation in large liquid scintillator detectors a detailed knowledge about the absorption and emission spectra of the scintillator molecules is mandatory. Furthermore reemission probabilities and quantum yields of the scintillator components influence the light propagation inside the liquid. Absorption and emission properties are presented for liquid scintillators using 2,5-Diphenyloxazole (PPO) and 4-bis-(2-Methylstyryl)benzene (bis-MSB) as primary and secondary wavelength shifter. New measurements of the quantum yields for various aromatic molecules are shown.

  17. An order parameter equation for the dynamic yield stress in dense colloidal suspensions

    E-Print Network [OSTI]

    Michio Otsuki; Shin-ichi Sasa

    2006-08-02

    We study the dynamic yield stress in dense colloidal suspensions by analyzing the time evolution of the pair distribution function for colloidal particles interacting through a Lennard-Jones potential. We find that the equilibrium pair distribution function is unstable with respect to a certain anisotropic perturbation in the regime of low temperature and high density. By applying a bifurcation analysis to a system near the critical state at which the stability changes, we derive an amplitude equation for the critical mode. This equation is analogous to order parameter equations used to describe phase transitions. It is found that this amplitude equation describes the appearance of the dynamic yield stress, and it gives a value of 2/3 for the shear thinning exponent. This value is related to the mean field value of the critical exponent $\\delta$ in the Ising model.

  18. Using Legumes to Enhance Sustainability of Sorghum Cropping Systems in the East Texas Pineywoods Ecoregion: Impacts on Soil Nitrogen, Soil Carbon, and Crop Yields 

    E-Print Network [OSTI]

    Neely, Clark B

    2013-05-03

    bicolor (L.) Moench], high-biomass sorghum [Sorghum bicolor (L.) Moench], and annual forage cropping systems. These studies quantified legume soil moisture usage and C and N contributions to the soil and subsequent crop yields in East Texas. Primary...

  19. Defect Tolerance in VLSI Circuits: Techniques and Yield Analysis

    E-Print Network [OSTI]

    Koren, Israel

    severity grows proportionally with the size and density of the chip. Consequently, the development and use as the proportion of operational circuits to the total number of fabricated circuits. A yield of 100% is unlikely, due to various manufacturing defects that exist even under mature manufacturing conditions. Continuous

  20. Computational Fluid Dynamics (CFD) Modelling on Soot Yield for Fire

    E-Print Network [OSTI]

    Computational Fluid Dynamics (CFD) Modelling on Soot Yield for Fire Engineering Assessment Yong S (CFD) Modelling is now widely used by fire safety engineers throughout the world as a tool of the smoke control design as part of the performance based fire safety design in the current industry

  1. Spot Convenience Yield Models for Energy Michael Ludkovski

    E-Print Network [OSTI]

    Ludkovski, Mike

    is more appropriate for energy commodities. Because a commodity can be consumed its price is a combinationSpot Convenience Yield Models for Energy Assets Michael Ludkovski and Ren´e Carmona August 2003 1 Introduction As the energy markets continue to evolve, valuation of energy-linked assets has been one

  2. Consistent scenario for B{yields}PS decays

    SciTech Connect (OSTI)

    Delepine, D.; Lucio M, J. L.; Mendoza S, J. A.; Ramirez, Carlos A.

    2008-12-01

    We consider B{yields}PS decays where P stands for pseudoscalar and S for a heavy (1500 MeV) scalar meson. We achieve agreement with available experimental data, which includes two orders of magnitude hierarchy, assuming the scalars mesons are two quark states. The contribution of the dipolar penguin operator O{sub 11} is quantified.

  3. Sediment Yield Response to Sediment Reduction Strategies Implemented for 10

    E-Print Network [OSTI]

    195 Sediment Yield Response to Sediment Reduction Strategies Implemented for 10 Years in Watersheds impact practices designed to reduce sediment delivery according to voluntary agreements and regulatory of sediment processes within the past 50 years when information is most reliable have created watershed

  4. Carbon Nanotube Correlation: Promising Opportunity for CNFET Circuit Yield Enhancement

    E-Print Network [OSTI]

    De Micheli, Giovanni

    Carbon Nanotube Correlation: Promising Opportunity for CNFET Circuit Yield Enhancement Jie Zhang1 Mitra1 1 Stanford University, Stanford, CA, U.S.A 2 LSI-EPFL, Lausanne, Switzerland Abstract Carbon are very difficult to control. As a result, "small-width" Carbon Nanotube Field-Effect Transistors (CNFETs

  5. Emulating maize yields from global gridded crop models using

    E-Print Network [OSTI]

    Emulating maize yields from global gridded crop models using statistical estimates Elodie Blanc and Benjamin Sultan Report No. 279 March 2015 #12;The MIT Joint Program on the Science and Policy of Global from two established MIT research centers: the Center for Global Change Science (CGCS) and the Center

  6. Z{yields}bb and chiral currents in Higgsless models

    SciTech Connect (OSTI)

    Abe, Tomohiro; Tanabashi, Masaharu; Chivukula, R. Sekhar; Christensen, Neil D.; Hsieh, Ken; Simmons, Elizabeth H.; Matsuzaki, Shinya

    2009-04-01

    In this paper we compute the flavor-dependent chiral-logarithmic corrections to the decay Z{yields}bb in the three-site Higgsless model. We compute these corrections diagrammatically in the gaugeless limit in which the electroweak couplings vanish. We also compute the chiral-logarithmic corrections to the decay Z{yields}bb using a renormalization group equation analysis in effective field theory, and show that the results agree. In the process of this computation, we compute the form of the chiral current in the gaugeless limit of the three-site model, and consider the generalization to the N-site case. We elucidate the Ward-Takahashi identities which underlie the gaugeless limit calculation in the three-site model, and describe how the result for the Z{yields}bb amplitude is obtained in unitary gauge in the full theory. We find that the phenomenological constraints on the three-site Higgsless model arising from measurements of Z{yields}bb are relatively mild, requiring only that the heavy Dirac fermion be heavier than 1 TeV or so, and are satisfied automatically in the range of parameters allowed by other precision electroweak data.

  7. Bird Communities and Biomass Yields in Potential Bioenergy Grasslands

    E-Print Network [OSTI]

    Turner, Monica G.

    richness and the density of total birds and SGCNs, suggesting that grassland bioenergy fields may be moreBird Communities and Biomass Yields in Potential Bioenergy Grasslands Peter J. Blank1 *, David W, Wisconsin, United States of America Abstract Demand for bioenergy is increasing, but the ecological

  8. Detailed analysis of the energy yield of systems with covered sheet-and-tube PVT collectors

    SciTech Connect (OSTI)

    Santbergen, R.; Rindt, C.C.M.; van Zolingen, R.J.Ch.; Zondag, H.A.

    2010-05-15

    Solar cells have a typical efficiency in the range of 5-20%, implying that 80% or more of the incident solar energy can be harvested in the form of heat and applied for low-temperature heating. In a PVT collector one tries to collect this heat. In this work, the electrical and thermal yield of solar domestic hot water systems with one-cover sheet-and-tube PVT collectors were considered. Objectives of the work were to understand the mechanisms determining these yields, to investigate measures to improve these yields and to investigate the yield consequences if various solar cell technologies are being used. The work was carried out using numerical simulations. A detailed quantitative understanding of all loss mechanisms was obtained, especially of those being inherent to the use of PVT collectors instead of PV modules and conventional thermal collectors. The annual electrical efficiencies of the PVT systems investigated were up to 14% (relative) lower compared to pure PV systems and the annual thermal efficiencies up to 19% (relative) lower compared to pure thermal collector systems. The loss of electrical efficiency is mainly caused by the relatively high fluid temperature. The loss of thermal efficiency is caused both by the high emissivity of the absorber and the withdrawal of electrical energy. However, both the loss of electrical and thermal efficiency can be reduced further by the application of anti-reflective coatings. The thermal efficiency can be improved by the application of a low-emissivity coating on the absorber, however at the cost of a reduced electrical efficiency. (author)

  9. Tropical Pacific response to 20th century Atlantic warming F. Kucharski,1

    E-Print Network [OSTI]

    Kang, In-Sik

    and L. Feudale1 Received 16 November 2010; accepted 13 December 2010; published 1 February 2011. [1. Feudale (2011), Tropical Pacific response to 20th century Atlantic warming, Geophys. Res. Lett., 38, L

  10. The tropical cyclone-induced flux of carbon between the ocean and the atmosphere

    E-Print Network [OSTI]

    Zimmerman, Neil L

    2012-01-01

    Tropical cyclones are known to cause phytoplankton blooms in regions of the ocean that would otherwise support very little life; it is also known that these storms entrain carbon-rich deep water, which can cause ...

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

    E-Print Network [OSTI]

    Woodruff, Jonathan Dalrymple

    2009-01-01

    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 ...

  12. Do Gravity Waves Transport Angular Momentum away from Tropical Cyclones? YUMIN MOON AND DAVID S. NOLAN

    E-Print Network [OSTI]

    Nolan, David S.

    Do Gravity Waves Transport Angular Momentum away from Tropical Cyclones? YUMIN MOON AND DAVID S be represented solely as vorticity perturbations. For this reason, these studies (e.g., Carr and Williams 1989

  13. Population Dynamics and Tropical Deforestation: State of the Debate and Conceptual Challenges

    E-Print Network [OSTI]

    Lopez-Carr, David

    ); population. Please address correspondence to David L. Carr, University of California, Santa Barbara, CA, USAPopulation Dynamics and Tropical Deforestation: State of the Debate and Conceptual Challenges David L. Carr Laurel Suter University of California Alisson Barbieri Carolina Population Center What

  14. Tropical Storm Frances Situation Report, September 8, 2004 (10:00 PM EDT)

    SciTech Connect (OSTI)

    None

    2004-09-08

    The report provides highlights related to impacts of Tropical Storm Frances n the Florida area. Sections on electric information, oil and gas information, and county outage data are provided.

  15. Assessing impact of the sulfate aerosol first indirect effect on tropical cyclone activity

    E-Print Network [OSTI]

    Chang, Hao-yu Derek

    2015-01-01

    Tropical cyclones (TCs) are among the most expensive and lethal geophysical hazards. Studies suggest that the intensity of TCs will increase due to the thermodynamic effects of anthropogenic greenhouse gas input. In contrast, ...

  16. Connections between deep tropical clouds and the Earth's ionosphere M. E. Hagan,1

    E-Print Network [OSTI]

    California at Berkeley, University of

    Connections between deep tropical clouds and the Earth's ionosphere M. E. Hagan,1 A. Maute,1 R. G troposphere. Citation: Hagan, M. E., A. Maute, R. G. Roble, A. D. Richmond, T. J. Immel, and S. L. England

  17. 13. Tropical Cyclone Landfall Experiment Principal Investigators: John Kaplan Peter Dodge

    E-Print Network [OSTI]

    97! 13. Tropical Cyclone Landfall Experiment ! Principal Investigators: John Kaplan Peter Dodge operational statistical models (such as the Kaplan/DeMaria decay model) and numerical models like the HWRF

  18. Organic farming practices for rice under diversified cropping systems in humid tropics.

    E-Print Network [OSTI]

    Varughese, Kuruvilla Dr; Rani, B Dr; Abraham, Suja; John, Jacob Dr; M, Vijayan Dr

    2009-01-01

    HTM (accessed on 15-1- KAU (Kerala Agricultural University).Crops. (2002) 12 th edition, Kerala Agricultural University,humid tropical regions of Kerala there is a reduction in

  19. On the role of wind driven ocean dynamics in tropical Atlantic variability 

    E-Print Network [OSTI]

    Da Silva, Meyre Pereira

    2006-08-16

    The response of the tropical Atlantic Ocean to wind stress forcing on seasonal and interannual time scales is examined using an ocean data assimilation product from the Geophysical Fluid Dynamics Laboratory (GFDL), and an ocean general circulation...

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

    E-Print Network [OSTI]

    Langousis, Andreas, 1981-

    2009-01-01

    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 ...

  1. Downscaling CMIP5 climate models shows increased tropical cyclone activity over the 21st century

    E-Print Network [OSTI]

    Emanuel, Kerry Andrew

    A recently developed technique for simulating large [O(10[superscript 4])] numbers of tropical cyclones in climate states described by global gridded data is applied to simulations of historical and future climate states ...

  2. Tropical Storm Frances Situation Report, September 8, 2004 (10:00 AM EDT)

    SciTech Connect (OSTI)

    2004-09-08

    The report provides highlights related to impacts of Tropical Storm Frances in the Florida area. Sections on electric information, oil and gas information, and county outage data are provided.

  3. Tropical Storm Frances Situation Report, September 7, 2004 (10:00 PM EDT)

    SciTech Connect (OSTI)

    2004-09-07

    The report provides highlights related to impacts of Tropical Storm Frances in the Florida area. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  4. Leaf traits and foliar CO2 exchange in a Peruvian tropical montane cloud forest 

    E-Print Network [OSTI]

    Van de Weg, Marjan

    2011-06-28

    Tropical montane cloud forests (TMCF) are one of the most fascinating, but least understood ecosystems in the world, and the interest in the carbon (C) cycle of TMCFs with regard to carbon sequestration and storage ...

  5. 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 ...

  6. Alkyl nitrate (C 1 -C 3 ) depth profiles in the tropical Pacific Ocean

    E-Print Network [OSTI]

    Dahl, E. E; Yvon-Lewis, S. A; Saltzman, E. S

    2007-01-01

    Experiment (WOCE), vol. 2, Pacific Ocean DRAFT, edited by M.over the equatorial Pacific Ocean during SAGA 3, J. Geophys.the troposphere over the Pacific Ocean during PEM- Tropics A

  7. Reduced impact logging minimally alters tropical rainforest carbon and energy exchange

    E-Print Network [OSTI]

    2011-01-01

    Brazil | Amazon | land use | micrometeorology D eforestation in the tropics affects the land–atmosphere ex- change of trace gases and energyand energy (W·m ?2 ) ?uxes, calculated as (? = logged ? unlogged), in Tapajos National Forest, Para, Brazil.

  8. Diatom-based Late Quaternary precipitation record for lowland tropical South America 

    E-Print Network [OSTI]

    Fitzpatrick, Katharine Anne

    2012-06-25

    The late Quaternary palaeoclimatic history of the lowland Southern Hemisphere Tropics of South America (SHTSA) has been little studied and analysis of key climatic events, such as the Last Glacial Maximum (centred ~ ...

  9. Energy and Cost Associated with Ventilating Office Buildings in a Tropical Climate

    E-Print Network [OSTI]

    Rim, Donghyun; Schiavon, Stefano; Nazaroff, William W

    2015-01-01

    Building Ventilation and Energy Use in Tropical Climatesbuildings. Florida Solar Energy Center. USDOE (2011) ReportReview. U.S. Department of Energy. Pérez-Lombard L, Ortiz J,

  10. The effect of subsurface temperature variability on the predictability of SST in the tropical Atlantic Ocean 

    E-Print Network [OSTI]

    Bates, Susan Carr

    1999-01-01

    The role of thermocouple variability and its effects on tropical Atlantic SST is investigated through the generation of SST predictions using a linear inverse modeling technique developed by Penland (1989). In order to ...

  11. Analysis of TRMM Precipitation Radar Algorithms and Rain over the Tropics and Southeast Texas 

    E-Print Network [OSTI]

    Funk, Aaron

    2013-12-10

    The Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) 2A23 algorithm classifies rain echo as stratiform or convective while the 2A25 algorithm corrects vertical profiles of radar reflectivity for attenuation ...

  12. Statistical Relationships of the Tropical Rainfall Measurement Mission (TRMM) Precipitation and Large-scale Flow 

    E-Print Network [OSTI]

    Borg, Kyle

    2010-07-14

    The relationship between precipitation and large-flow is important to understand and characterize in the climate system. We examine statistical relationships between the Tropical Rainfall Measurement Mission (TRMM) 3B42 ...

  13. The frequency of tropical precipitating clouds as observed by the TRMM PR and ICESat/GLAS 

    E-Print Network [OSTI]

    Casey, Sean Patrick

    2009-06-02

    Convective clouds in the tropics can be grouped into three categories: shallow clouds with cloud-top heights near 2 km above the surface, mid-level congestus clouds with tops near the 0°C level, and deep convective clouds ...

  14. Photo: Bruno Marty / IRD Observed and expected changes to the tropical

    E-Print Network [OSTI]

    Qiu, Bo

    simulations 104 3.2 Features of the tropical Pacific Ocean 105 3.2.1 Large-scale currents 105 3.2.2 Ocean.3 Observed and projected changes in the tropical Pacific Ocean 141 3.3.1 Large-scale currents 141 3.3.2 Ocean, dissolved oxygen concentration and pH affect biological activity; and oceanic currents, waves and sea level

  15. Interactions of tropical synoptic-scale features as viewed from satellite 

    E-Print Network [OSTI]

    Winton, Susan Elizabeth

    1991-01-01

    INTERACTIONS OF TROPICAL SYNOPTIC-SCALE FEATURES AS VIEWED FROM SATELLITE Thesis by SUSAN ELIZABETH WINTON Submitted to tbe Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1991 Major Subject: Meteorology INTERACTIONS QF TROPICAL SYNOPTIC-SCALE FEATURES AS VIEWED FROM SATELLITE A Thesis by SUSAN ELIZABETH WINTON Approved as to style and content by: James P. McGuirk (Chair of Committee...

  16. Fig 1. First rotation biomass yield [Mg (oven dry) ha-1 ] of top 5 clones with biomass crop yield trials

    E-Print Network [OSTI]

    Minnesota, University of

    Fig 1. First rotation biomass yield [Mg (oven dry) ha-1 yr-1 ] of top 5 clones with biomass crop about growing SRWCs for bioenergy is that SRWCs may not produce sufficient biomass as a feasible (Fig 1) is well below the required amount of biomass necessary to sustain feasibility of bioenergy

  17. 1484 J. Phys. Chem. 1991,95, 1484-1488 molecules. At w, = 5 the photoionization yield is increased because

    E-Print Network [OSTI]

    Suslick, Kenneth S.

    1484 J. Phys. Chem. 1991,95, 1484-1488 molecules. At w, = 5 the photoionization yield is increased Energy Sciences, Office of Energy Research, U S . Department of Energy. P.B. thanks the National Council of metal ions with high-energy radicals formed directly in the cavitation event. The large line width

  18. Engineered ketol-acid reductoisomerase and alcohol dehydrogenase enable anaerobic 2-methylpropan-1-ol production at theoretical yield in

    E-Print Network [OSTI]

    Snow, Christopher

    be as efficient as bioethanol production, which reaches commercial viability through anaerobic, high-ol production at theoretical yield in Escherichia coli Sabine Bastian a , Xiang Liu a,1 , Joseph T are required for an economically competitive process, only aerobic isobutanol production has been feasible due

  19. A comparison of silage and grain yields of four corn hybrids at three locations in Texas 

    E-Print Network [OSTI]

    Spears, Ben Riley

    1953-01-01

    A))'I H. '" C I'I OH ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 40 AILNHIX o ~ ~ ~ ~ ~ ~ ~ ~ ~ o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ o oo IT 42 1, Ccsibined silage yields grain yield and lodging percentage of the four hybrids for all locations? 2...? Ceabined silage yields grain yield and lodging percentage of the three plant spacdngs for all locations, TABLES Analysis of variance of silage yields at College Station. Analysis of vsr1mme of grain yields at GoUege Statics& 30 4. Analysis...

  20. Lidar Investigation of Tropical Nocturnal Boundary Layer Aerosols and Cloud Macrophysics

    SciTech Connect (OSTI)

    Manoj, M. G.; Devara, PC S.; Taraphdar, Sourav

    2013-10-01

    Observational evidence of two-way association between nocturnal boundary layer aerosols and cloud macrophysical properties under different meteorological conditions is reported in this paper. The study has been conducted during 2008-09 employing a high space-time resolution polarimetric micro-pulse lidar over a tropical urban station in India. Firstly, the study highlights the crucial role of boundary layer aerosols and background meteorology on the formation and structure of low-level stratiform clouds in the backdrop of different atmospheric stability conditions. Turbulent mixing induced by the wind shear at the station, which is associated with a complex terrain, is found to play a pivotal role in the formation and structural evolution of nocturnal boundary layer clouds. Secondly, it is shown that the trapping of energy in the form of outgoing terrestrial radiation by the overlying low-level clouds can enhance the aerosol mixing height associated with the nocturnal boundary layer. To substantiate this, the long-wave heating associated with cloud capping has been quantitatively estimated in an indirect way by employing an Advanced Research Weather Research and Forecasting (WRF-ARW) model version 2.2 developed by National Center for Atmospheric Research (NCAR), Colorado, USA, and supplementary data sets; and differentiated against other heating mechanisms. The present investigation as well establishes the potential of lidar remote-sensing technique in exploring some of the intriguing aspects of the cloud-environment relationship.

  1. Environment and the Lifetime of Tropical Deep Convection in a Cloud-Permitting Regional Model Simulation

    SciTech Connect (OSTI)

    Hagos, Samson M.; Feng, Zhe; McFarlane, Sally A.; Leung, Lai-Yung R.

    2013-08-01

    By applying a cloud tracking algorithm to tropical convective systems simulated by a regional high resolution model, the study documents environmental conditions before and after convective systems are initiated over ocean and land by following them during their lifetime. The comparative roles of various environmental fields in affecting the lifetime of convection are also quantified. The statistics of lifetime, maximum area, propagation speed and direction of the simulated deep convection agrees well with geostationary satellite observations. Over ocean, convective systems enhance surface fluxes through the associated wind gusts as well as cooling and drying of the boundary layer. A significant relationship is found between the mean surface fluxes during their lifetime and the longevity of the systems which in turn is related to the initial intensity of the moist updraft and to a lesser extent upper level shear. Over land, on the other hand, convective activity suppresses surface fluxes through cloud cover and the lifetime of convection is related to the upper level shear during their lifetime and strength of the heat fluxes several hours before the initiation of convection. For systems of equal lifetime, those over land are significantly more intense than those over ocean especially during early stages of their lifetime.

  2. Runaway electrons as a source of impurity and reduced fusion yield in the dense plasma focus

    SciTech Connect (OSTI)

    Lerner, Eric J.; Yousefi, Hamid R.

    2014-10-15

    Impurities produced by the vaporization of metals in the electrodes may be a major cause of reduced fusion yields in high-current dense plasma focus devices. We propose here that a major, but hitherto-overlooked, cause of such impurities is vaporization by runaway electrons during the breakdown process at the beginning of the current pulse. This process is sufficient to account for the large amount of erosion observed in many dense plasma focus devices on the anode very near to the insulator. The erosion is expected to become worse with lower pressures, typical of machines with large electrode radii, and would explain the plateauing of fusion yield observed in such machines at higher peak currents. Such runaway electron vaporization can be eliminated by the proper choice of electrode material, by reducing electrode radii and thus increasing fill gas pressure, or by using pre-ionization to eliminate the large fields that create runaway electrons. If these steps are combined with monolithic electrodes to eliminate arcing erosion, large reductions in impurities and large increases in fusion yield may be obtained, as the I{sup 4} scaling is extended to higher currents.

  3. Comparison of Fission Product Yields and Their Impact

    SciTech Connect (OSTI)

    S. Harrison

    2006-02-01

    This memorandum describes the Naval Reactors Prime Contractor Team (NRPCT) Space Nuclear Power Program (SNPP) interest in determining the expected fission product yields from a Prometheus-type reactor and assessing the impact of these species on materials found in the fuel element and balance of plant. Theoretical yield calculations using ORIGEN-S and RACER computer models are included in graphical and tabular form in Attachment, with focus on the desired fast neutron spectrum data. The known fission product interaction concerns are the corrosive attack of iron- and nickel-based alloys by volatile fission products, such as cesium, tellurium, and iodine, and the radiological transmutation of krypton-85 in the coolant to rubidium-85, a potentially corrosive agent to the coolant system metal piping.

  4. Direct measurement of yield stress of discrete materials

    E-Print Network [OSTI]

    S. H. Ebrahimnazhad Rahbari; J. Vollmer; S. Herminghaus; M. Brinkmann

    2012-06-09

    We present a novel computational method for direct measurement of yield stress of discrete materials. The method is well-suited for the measurement of jamming phase diagram of a wide range of discrete particle systems such as granular materials, foams, and colloids. We further successfully apply the method to evaluate the jamming phase diagram of wet granular material in order to demonstrates the applicability of the model.

  5. Bushland Management For Water Yield: Prospects for Texas. 

    E-Print Network [OSTI]

    McCarl, Bruce A.; Griffin, Ronald C.; Kaiser, Ronald A.; Freeman, Lansingh S.; Blackburn, Wilbert H.; Jordan, Wayne R.

    1987-01-01

    [Blank Page in Original Bulletin] BRUSHLAND MANAGEMENT FOR WATER YIELD: PROSPECTS FOR TEXAS Bruce A. McCarl Professor- Agricultural Economics Ronald C. Griffin Associate Professor- Agricultural Economics Ronald A. Kaiser Assistant Professor... management. The main categories of these actions are a) continue current policy-no new initiatives; b) subsidize brush management through low-interest loans; c) cost share with those managing brush; d) refine property rights to resultant water so...

  6. Do yield and quality of big bluestem and switchgrass feedstock decline over winter?

    SciTech Connect (OSTI)

    Jane M.F. Johnson; Garold L. Gresham

    2014-03-01

    Switchgrass (Panicum virgatum L.) and big bluestem (Andropogon gerdardii Vitman) are potential perennial bioenergy feedstocks. Feedstock storage limitations, labor constraints for harvest, and environmental benefits provided by perennials are rationales for developing localized perennial feedstock as an alternative or in conjunction with annual feedstocks (i.e., crop residues). Little information is available on yield, mineral, and thermochemical properties of native species as related to harvest time. The study’s objectives were to compare the feedstock quantity and quality between grasses harvested in the fall or the following spring. It was hypothesized that biomass yield may decline, but translocation and/or leaching of minerals from the feedstock would improve feedstock quality. Feedstock yield did not differ by crop, harvest time, or their interactions. Both grasses averaged 6.0 Mg ha-1 (fall) and 5.4 Mg ha-1 (spring) with similar high heating value (17.7 MJ kg-1). The K/(Ca + Mg) ratio, used as a quality indicator declined to below a 0.5 threshold, but energy yield (Megajoule per kilogram) decreased 13% by delaying harvest until spring. Only once during the four study-years were conditions ideal for early spring harvest, in contrast during another spring, very muddy conditions resulted in excessive soil contamination. Early spring harvest may be hampered by late snow, lodging, and muddy conditions that may delay or prevent harvest, and result in soil contamination of the feedstock. However, reducing slagging/fouling potential and the mass of mineral nutrients removed from the field without a dramatic loss in biomass or caloric content are reasons to delay harvest until spring.

  7. World Bank to raise $250M for avoided deforestation in tropics World Bank to raise $250M for avoided deforestation in tropics

    E-Print Network [OSTI]

    Street Journal. The $250 million fund will reward Indonesia, Brazil, Congo and other tropical forest argue that the Reducing Emissions from Deforestation (RED) initiative, launched in 2005 by the United their forests to offset greenhouse gas emissionsm. Meanwhile, last month Brazil -- which has the world's largest

  8. Patterns of water and heat flux across a biome gradient from tropical forest to savanna in Brazil

    E-Print Network [OSTI]

    2009-01-01

    variations in energy and carbon exchange over forest andexample, the energy stored in tropical forest biomass variedforest (JRU) and that illustrates the control that available energy

  9. Tropical biomass burning smoke plume size, shape, reflectance, and age based on 2001â??2009 MISR imagery of Borneo

    E-Print Network [OSTI]

    Zender, C. S.; Krolewski, A. G.; Tosca, M. G.; Randerson, J. T.

    2012-01-01

    C. S. Zender et al. : Tropical biomass burning smoke plumeslaboratory measurements of biomass-burning emis- sions: 1.aerosol optical depth biomass burning events: a comparison

  10. Tropical biomass burning smoke plume size, shape, reflectance, and age based on 2001-2009 MISR imagery of Borneo

    E-Print Network [OSTI]

    Zender, CS; Krolewski, AG; Tosca, MG; Randerson, JT

    2012-01-01

    C. S. Zender et al. : Tropical biomass burning smoke plumeslaboratory measurements of biomass-burning emis- sions: 1.aerosol optical depth biomass burning events: a comparison

  11. EXPERIMENT 5101 STANDARD NAVY YIELD TRIAL PLANTING DATE 06/01/05 ENTRY NAMES NO. YIELD CWT 100 SEED DAYS TO DAYS TO LODGING HEIGHT DES.

    E-Print Network [OSTI]

    EXPERIMENT 5101 STANDARD NAVY YIELD TRIAL PLANTING DATE 06/01/05 ENTRY NAMES NO. YIELD CWT 100 SEED-242 NAVY GENTEC, VISTA 23 31.6 19.9 44.0 96.2 3.0 48.1 4.0 N00762 VISTA/MACKINAC//N94080 3 31.5 18.6 43;EXPERIMENT 5101 STANDARD NAVY YIELD TRIAL PLANTING DATE 06/01/05 ENTRY NAMES NO. YIELD CWT 100 SEED DAYS

  12. Clickstream Data Yields High-Resolution Maps of Science Johan Bollen1

    E-Print Network [OSTI]

    Hagberg, Aric

    Digital Library Research and Prototyping Team, Research Library, Los Alamos National Laboratory, Los Group, and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico, United

  13. Dilute Acid Hydrolysis of Oligomers in Hydrothermal Pretreatment Hydrolyzate into Monomers with High Yields

    E-Print Network [OSTI]

    Tsai, Yueh-Du

    2012-01-01

    Renewable Energy Laboratory, September Chapter 6 Conclusions and Recommendations 6.1 Summary of thesis objectives The main motivation

  14. Dilute Acid Hydrolysis of Oligomers in Hydrothermal Pretreatment Hydrolyzate into Monomers with High Yields

    E-Print Network [OSTI]

    Tsai, Yueh-Du

    2012-01-01

    578. Hsu T. 1996. Bioethanol: Production and Utilization.design and costing of bioethanol technology: a tool for9 Bioethanol

  15. Dilute Acid Hydrolysis of Oligomers in Hydrothermal Pretreatment Hydrolyzate into Monomers with High Yields

    E-Print Network [OSTI]

    Tsai, Yueh-Du

    2012-01-01

    Industrial and Engineering Chemistry 37: 43-52. Saha B.production. Industrial & Engineering Chemistry Research 48:Industrial and Engineering Chemistry 37: 43-52. Saulnier L,

  16. Dilute Acid Hydrolysis of Oligomers in Hydrothermal Pretreatment Hydrolyzate into Monomers with High Yields

    E-Print Network [OSTI]

    Tsai, Yueh-Du

    2012-01-01

    1998. Biomass for renewable energy, fuels, and chemicals.Elsevier. The National Renewable Energy Laboratory.2003,Golden, CO: National Renewable Energy Laboratory, 2007.

  17. Switchgrass is a promising, high-yielding crop for California biofuel

    E-Print Network [OSTI]

    2011-01-01

    2001. Biomass productions of ‘Alamo’ switchgrass variety intwo released varieties (Alamo and Kanlow) and four experi-

  18. Dilute Acid Hydrolysis of Oligomers in Hydrothermal Pretreatment Hydrolyzate into Monomers with High Yields

    E-Print Network [OSTI]

    Tsai, Yueh-Du

    2012-01-01

    Klass DL. 1998. Biomass for renewable energy, fuels, andNational Renewable Energy Laboratory.2003, Biomass feedstockKlass DL. 1998. Biomass for Renewable Energy, Fuels and

  19. High-yield decomposition of surface EMG signals S. Hamid Nawab b,c,d

    E-Print Network [OSTI]

    De Luca, Carlo J.

    electromyographic (sEMG) signals into their constituent motor unit action potential trains (MUAPTs). Methods approach of LeFever and De Luca (1982), decomposes the surface electromyographic (sEMG) signal

  20. Dilute Acid Hydrolysis of Oligomers in Hydrothermal Pretreatment Hydrolyzate into Monomers with High Yields

    E-Print Network [OSTI]

    Tsai, Yueh-Du

    2012-01-01

    578. Hsu T. 1996. Bioethanol: Production and Utilization.as a feedstock for bioethanol production for many years. Thebioethanol commercially in the U.S. Unlike sugar, production

  1. Dilute Acid Hydrolysis of Oligomers in Hydrothermal Pretreatment Hydrolyzate into Monomers with High Yields

    E-Print Network [OSTI]

    Tsai, Yueh-Du

    2012-01-01

    for corn stover. Report No. NREL/TP-510-32438. Golden, CO:of corn stover report No. NREL/TP- 5100-47764. Golden, CO:future scenarios. Report No. NREL/TP-580-26157. Golden, CO:

  2. NNSA Defense Programs Inertial Confinement Fusion Ignition and High Yield Campaign

    E-Print Network [OSTI]

    to provide advanced assessment capabilities for stockpile stewardship ·Support stockpile refurbishment

  3. CWB, 6/25/00 High-Yield Neutron Activation System for the

    E-Print Network [OSTI]

    Barnes, Cris W.

    to that used on TFTR and designed for ITER5 will be described as well as the requirements for the irradiation ohmic to 1.5 GW plasmas ­ NIF: 1010 n/shot (physics tests) to 10 MJ ignition >8 orders of magnitude l at vacuum vessel ­ 1010 neutrons/shot (hydro studies) 3x105 n/cm2 @ 50 cm (~minimum distance* and fluence

  4. A simple, high-yield, apparatus for NEG coating of vacuum beamline elements

    E-Print Network [OSTI]

    Ron, Guy

    2011-01-01

    magnet arrange- ment. 4.1 Coating Thin Tubes Thin tubesyield, apparatus for NEG coating of vacuum beamline elementscost apparatus, which allows coating of very small diameter

  5. Switchgrass is a promising, high-yielding crop for California biofuel

    E-Print Network [OSTI]

    2011-01-01

    both as forage and as a biofuel crop, switchgrass may bepanic grass grown as a biofuel in southern England. Bioresfor switchgrass for biofuel systems. Biomass Bioenergy 30:

  6. Microbial Electrolysis Cells (MECs) for High Yield Hydrogen (H2) Production

    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 Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICESpecial ReportProposal toDepartment ofEnergy Michigan3 BALLARDfrom

  7. BETO Seeks Stakeholder Input on Achieving High Yields from Algal Feedstocks

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p uBUS SERVICE SUBSIDIES ATj. Indirect

  8. Mapping Intra-Field Yield Variation Using High Resolution Satellite Imagery

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousandReport)PriceHistoricEnergy Efficiency »5 Condon

  9. IEEE Transactions on Electronics Packaging Manufacturing, 2001 On the Use of Yielded Cost in Modeling Electronic

    E-Print Network [OSTI]

    Sandborn, Peter

    that is independent of step order between steps that scrap defective product. Index Terms ­ cost, yield, yielded costIEEE Transactions on Electronics Packaging Manufacturing, 2001 1 On the Use of Yielded Cost and Systems Center University of Maryland College Park, MD 20742 Abstract ­ Yielded cost is defined as cost

  10. Emulating maize yields from global gridded crop models using statistical estimates

    E-Print Network [OSTI]

    Blanc, E.

    This study estimates statistical models emulating maize yield responses to changes in temperature and

  11. Measurement of the Fractional Thermonuclear Neutron Yield during Deuterium Neutral-Beam Injection into Deuterium Plasmas

    E-Print Network [OSTI]

    Measurement of the Fractional Thermonuclear Neutron Yield during Deuterium Neutral-Beam Injection into Deuterium Plasmas

  12. Yield enhancement of VLSI/WSI array systems 

    E-Print Network [OSTI]

    Koo, Peter Yunemo

    1989-01-01

    Xs X7 F1g. 12 Detection nf br1ciging faults between two output 11nes. Table V. Statistics of the proposed approach for 5-3-3 fault patter&i PLA input product output PCD, PD, PCD?PD, 3 F, adr4 lines lines lines 92. 13 0. 33 96 04 1 Or (%) 94... single wafer, tllils avoiding lugli manufacturing costs. In this research, vield enhancement of two typical VLSI/IVSI array systems, PLAs aud Pipeline 4rrays, is considered Yield enhancement of PLAs tluough reconfiguration is an important issue...

  13. Simulations Yield Clues to How Cells Interact With Surroundings

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque|Sensitive Species3 Outlook forSimulations Yield Clues to How

  14. TECHNICAL REPORTS Nutrient leaching in highly weathered tropical soils often poses

    E-Print Network [OSTI]

    Lehmann, Johannes

    for crop production. We investigated the effects of applying 20 t ha-1 biochar (BC) to a Colombian savanna additions were about one order of magnitude lower than at other depths, except for P. Biochar applications. Nutrient Leaching in a Colombian Savanna Oxisol Amended with Biochar Julie Major, Marco Rondon, Diego

  15. EFFECTIVENESS OF QUIKSCAT'S ULTRA-HIGH RESOLUTION IMAGES IN DETERMINING TROPICAL CYCLONE EYE LOCATION

    E-Print Network [OSTI]

    Long, David G.

    459 Clyde Building, Provo, UT 84602, USA ABSTRACT The 25km resolution standard wind products (L2B) are available op- erationally in near-real time from SeaWinds on QuikSCAT. This rel- atively low resolution can, for a given year and basin, mean error distance as small as 15km with a 9km standard deviation. The use

  16. Land cover change and remote sensing: Examples of quantifying spatiotemporal dynamics in tropical forests

    SciTech Connect (OSTI)

    Krummel, J.R.; Su, Haiping; Fox, J.; Yarnasan, S.; Ekasingh, M.

    1995-06-01

    Research on human impacts or natural processes that operate over broad geographic areas must explicitly address issues of scale and spatial heterogeneity. While the tropical forests of Southeast Asia and Mexico have been occupied and used to meet human needs for thousands of years, traditional forest management systems are currently being transformed by rapid and far-reaching demographic, political, economic, and environmental changes. The dynamics of population growth, migration into the remaining frontiers, and responses to national and international market forces result in a demand for land to produce food and fiber. These results illustrate some of the mechanisms that drive current land use changes, especially in the tropical forest frontiers. By linking the outcome of individual land use decisions and measures of landscape fragmentation and change, the aggregated results shows the hierarchy of temporal and spatial events that in summation result in global changes to the most complex and sensitive biome -- tropical forests. By quantifying the spatial and temporal patterns of tropical forest change, researchers can assist policy makers by showing how landscape systems in these tropical forests are controlled by physical, biological, social, and economic parameters.

  17. Measurement of air and nitrogen fluorescence light yields induced by electron beam for UHECR experiments

    E-Print Network [OSTI]

    P. Colin; A. Chukanov; V. Grebenyuk; D. Naumov; P. Nedelec; Y. Nefedov; A. Onofre; S. Porokhovoi; B. Sabirov; L. Tkatchev

    2006-12-04

    Most of the Ultra High Energy Cosmic Ray (UHECR) experiments and projects (HiRes, AUGER, TA, EUSO, TUS,...) use air fluorescence to detect and measure extensive air showers (EAS). The precise knowledge of the Fluorescence Light Yield (FLY) is of paramount importance for the reconstruction of UHECR. The MACFLY - Measurement of Air Cherenkov and Fluorescence Light Yield - experiment has been designed to perform such FLY measurements. In this paper we will present the results of FLY in the 290-440 nm wavelength range for dry air and pure nitrogen, both excited by electrons with energy of 1.5 MeV, 20 GeV and 50 GeV. The experiment uses a 90Sr radioactive source for low energy measurement and a CERN SPS electron beam for high energy. We find that the FLY is proportional to the deposited energy (E_d) in the gas and we show that the air fluorescence properties remain constant independently of the electron energy. At the reference point: atmospheric dry air at 1013 hPa and 23C, the ratio FLY/E_d=17.6 photon/MeV with a systematic error of 13.2%.

  18. Tropical Ocean Climate Study (TOCS) and Japan-United States Tropical Ocean Study (JUSTOS) on the R/V KAIYO, 25 Jan to 2 March 1997, to the Tropical Western Pacific Ocean BNL component

    SciTech Connect (OSTI)

    Reynolds, R.M.; Smith, S.

    1997-04-11

    The Japanese U.S. Tropical Ocean Study (JUSTOS) cruise on the R/V KAIYO in the Tropical Western Pacific Ocean was a collaborative effort with participants from the Japanese Marine Science and Technology Center (JAMSTEC), the National Center for Atmospheric Research (NCAR), and Brookhaven National Laboratory BNL. This report is a summary of the instruments, measurements, and initial analysis of the BNL portion of the cruise only. It includes a brief description of the instrument system, calibration procedures, problems and resolutions, data collection, processing and data file descriptions. This is a working document, which is meant to provide both a good description of the work and as much information as possible in one place for future analysis.

  19. Nonproportionality in the scintillation light yield of bismuth germanate

    E-Print Network [OSTI]

    Gentile, T R; Breuer, H; Chupp, T E; Coakley, K J; Cooper, R L; Nico, J S; O'Neill, B

    2015-01-01

    We present measurements of nonproportionality in the scintillation light yield of bismuth germanate (BGO) for gamma-rays with energies between 6 keV and 662 keV. The scintillation light was read out by avalanche photodiodes (APDs) with both the BGO crystals and APDs operated at a temperature of approximately 90 K. Data were obtained using radioisotope sources to illuminate both a single BGO crystal in a small test cryostat and a 12-element detector in a neutron radiative beta-decay experiment. In addition one datum was obtained in a 4.6 T magnetic field based on the bismuth K x-ray escape peak produced by a continuum of background gamma rays in this apparatus. These measurements and comparison to prior results were motivated by an experiment to study the radiative decay mode of the free neutron. The combination of data taken under different conditions yields a reasonably consistent picture for BGO nonproportionality that should be useful for researchers employing BGO detectors at low gamma ray energies.

  20. Nonproportionality in the scintillation light yield of bismuth germanate

    E-Print Network [OSTI]

    T. R. Gentile; M. J. Bales; H. Breuer; T. E. Chupp; K. J. Coakley; R. L. Cooper; J. S. Nico; B. O'Neill

    2015-05-01

    We present measurements of nonproportionality in the scintillation light yield of bismuth germanate (BGO) for gamma-rays with energies between 6 keV and 662 keV. The scintillation light was read out by avalanche photodiodes (APDs) with both the BGO crystals and APDs operated at a temperature of approximately 90 K. Data were obtained using radioisotope sources to illuminate both a single BGO crystal in a small test cryostat and a 12-element detector in a neutron radiative beta-decay experiment. In addition one datum was obtained in a 4.6 T magnetic field based on the bismuth K x-ray escape peak produced by a continuum of background gamma rays in this apparatus. These measurements and comparison to prior results were motivated by an experiment to study the radiative decay mode of the free neutron. The combination of data taken under different conditions yields a reasonably consistent picture for BGO nonproportionality that should be useful for researchers employing BGO detectors at low gamma ray energies.

  1. Knoop Hardness - Apparent Yield Stress Relationship in Ceramics

    SciTech Connect (OSTI)

    Swab, Jeffrey J; LaSalvia, Jerry; Wereszczak, Andrew A; Strong, Kevin T; Danna, Dominic; Ragan, Meredith E; Ritt, Patrick J

    2012-01-01

    In Tabor's classical studies of the deformation of metals, the yield stress (Y) and hardness (H) were shown to be related according to H/Y {approx} 3 for complete or fully plastic deformation. Since then it has been anecdotally shown for ceramics that this ratio is <3. Interest exists to explore this further so Hertzian indentation was used to measure the apparent yield stress of numerous ceramics and metals and their results were compared with each material's load-dependent Knoop hardness. The evaluated ceramics included standard reference materials for hardness (silicon nitride and tungsten carbide), silicon carbide, alumina, and glass. Several steel compositions were also tested for comparison. Knoop hardness measurements at 19.6 N (i.e., toward 'complete or fully plastic deformation'), showed that 2 < H/Y < 3 for the metals and 0.8 < H/Y < 1.8 for the glasses and ceramics. Being that H/Y {ne} 3 for the ceramics indicates that Tabor's analysis is either not applicable to ceramics or that full plastic deformation is not achieved with a Knoop indentation or both.

  2. MEASUREMENT OF THE SECONDARY EMISSION YIELD OF A THIN DIAMOND WINDOW IN TRANSMISSION MODE.

    SciTech Connect (OSTI)

    CHANG, X.; RAO, T.; SMEDLEY, J.; ET AL.

    2005-05-16

    The secondary emission enhanced photoinjector (SEEP) is a promising new approach to the generation of high-current, high-brightness electron beams. A low current primary electron beam with energy of a few thousand electron-volts strikes a specially prepared diamond window which emits secondary electrons with a current two orders of magnitude higher. The secondary electrons are created at the back side of the diamond and drift through the window under the influence of a strong electrical field. A hydrogen termination at the exit surface of the window creates a negative electron affinity (NEA) which allows the electrons to leave the diamond. An experiment was performed to measure the secondary electron yield and other properties. The results are discussed in this paper.

  3. 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

  4. Mixed-phase clouds, thin cirrus clouds, and OLR over the tropics: observations, retrievals, and radiative impacts 

    E-Print Network [OSTI]

    Lee, Joonsuk

    2009-06-02

    The tropics is a very important region in terms of earth’s radiation budget because the net radiative heating is largest in the tropics and that surplus energy is redistributed by the circulations of oceans and atmospheres. Moreover, a large number...

  5. 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

  6. 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

  7. Analysis and prediction of hazard risks caused by tropical cyclones in Southern China with fuzzy mathematical and grey models

    E-Print Network [OSTI]

    Zhang, Da-Lin

    Analysis and prediction of hazard risks caused by tropical cyclones in Southern China with fuzzy 2011 Keywords: Combined weights Fuzzy mathematical models Hazard risk analysis Exceeded probability Tropical cyclones Grey prediction model a b s t r a c t A hazard-risk assessment model and a grey hazard

  8. 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

  9. October 1986 R. H. Johnson 721 Lower-Tropospheric Warming and Drying in Tropical Mesoscale Convective Systems

    E-Print Network [OSTI]

    Johnson, Richard H.

    October 1986 R. H. Johnson 721 Lower-Tropospheric Warming and Drying in Tropical Mesoscale components of tropical mesoscale convective systems. It is found that while the apparent heat source Q1 of mesoscale downdrafts within the mesoscale convective systems. The warming and drying at low levels

  10. Predictability of a Mediterranean Tropical-Like Storm Downstream of the Extratropical Transition of Hurricane Helene (2006)

    E-Print Network [OSTI]

    Chaboureau, Jean-Pierre

    2006-01-01

    northeastward by an upstream trough during ET and contributed to the building of a downstream ridge. A troughPredictability of a Mediterranean Tropical-Like Storm Downstream of the Extratropical Transition downstream. The present study focuses on the predictability of a Mediterranean tropical-like storm (Medicane

  11. Hydrogeologic and climatic influences on spatial and interannual variation of recharge to a tropical karst island aquifer

    E-Print Network [OSTI]

    Banner, Jay L.

    of groundwater in tropical island aquifers, such as on Barbados, are significantly influenced by tropical of rainfall. This study shows that estimates of average annual recharge to the limestone aquifer on Barbados, island aquifers, Barbados, ENSO Citation: Jones, I. C., and J. L. Banner, Hydrogeologic and climatic

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

    E-Print Network [OSTI]

    suggests that effects of TC can penetrate deeper into the ocean. This deep effect may result from the nearEffects of tropical cyclones on large-scale circulation and ocean heat transport in the South China the influence of tropical cyclones (TCs) on large-scale circulation and ocean heat transport in the South China

  13. Internal variability of the tropical Pacific ocean Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

    E-Print Network [OSTI]

    Jochum, Markus

    Internal variability of the tropical Pacific ocean M. Jochum Earth, Atmospheric and Planetary model of the tropical Pacific ocean is analyzed to quantify the interannual variability caused by internal variability of ocean dynamics. It is found that along the Pacific cold tongue internal variability

  14. 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

  15. ZeaChem Pilot Project: High-Yield Hybrid Cellulosic Ethanol Process Using High-Impact Feedstock for Commercialization

    Broader source: Energy.gov [DOE]

    This pilot-scale integrated biorefinery will produce 250,000 gallons per year of cellulosic ethanol when running at full operational status.

  16. Cirrus cloud-temperature interactions over a tropical station, Gadanki from lidar and satellite observations

    SciTech Connect (OSTI)

    S, Motty G, E-mail: mottygs@gmail.com; Satyanarayana, M., E-mail: mottygs@gmail.com; Krishnakumar, V., E-mail: mottygs@gmail.com; Dhaman, Reji k., E-mail: mottygs@gmail.com [Department of Optoelectronics, University of Kerala, Kariavattom, Trivandrum-695 581, Kerala (India)

    2014-10-15

    The cirrus clouds play an important role in the radiation budget of the earth's atmospheric system and are important to characterize their vertical structure and optical properties. LIDAR measurements are obtained from the tropical station Gadanki (13.5{sup 0} N, 79.2{sup 0} E), India, and meteorological indicators derived from Radiosonde data. Most of the cirrus clouds are observed near to the tropopause, which substantiates the strength of the tropical convective processes. The height and temperature dependencies of cloud height, optical depth, and depolarization ratio were investigated. Cirrus observations made using CALIPSO satellite are compared with lidar data for systematic statistical study of cirrus climatology.

  17. Tropical Medicine and International Health voLUME 2 NO rr SUPPLEMENT PP Ar-A54 NOVEMBER 1997 Human behaviour and cultural context in disease control

    E-Print Network [OSTI]

    Tropical Medicine and International Health voLUME 2 NO rr SUPPLEMENT PP Ar-A54 NOVEMBER 1997 Human, Department of Tropical Medicine, Twlane School of Public Health and Tropical Medicine, N ew Orleans, USA medicine and medical anthropology researchers contributed to a successful community- based cost recovery

  18. Timescales in creep and yielding of attractive gels

    E-Print Network [OSTI]

    Vincent Grenard; Thibaut Divoux; Nicolas Taberlet; Sébastien Manneville

    2013-11-27

    The stress-induced yielding scenario of colloidal gels is investigated under rough boundary conditions by means of rheometry coupled to local velocity measurements. Under an applied shear stress, the fluidization of gels made of attractive carbon black particles suspended in a mineral oil is shown to involve a previously unreported shear rate response $\\dot \\gamma (t)$ characterized by two well-defined and separated timescales $\\tau_c$ and $\\tau_f$. First $\\dot \\gamma(t)$ decreases as a weak power law strongly reminiscent of the primary creep observed in numerous crystalline and amorphous solids, coined the "Andrade creep." We show that the bulk deformation remains homogeneous at the micron scale, which demonstrates that if plastic events take place or if any shear transformation zone exists, such phenomena occur at a smaller scale. As a key result of this paper, the duration $\\tau_c$ of this creep regime decreases as a power law of the viscous stress, defined as the difference between the applied stress and the yield stress with an exponent ranging between 2 and 3 depending on the gel concentration. The end of this first regime is marked by a jump of the shear rate by several orders of magnitude, while the gel slowly slides as a solid block experiencing strong wall slip at both walls, despite rough boundary conditions. Finally, a second sudden increase of the shear rate is concomitant to the full fluidization of the material which ends up being homogeneously sheared. The corresponding fluidization time $\\tau_f$ robustly follows an exponential decay with the applied shear stress as already reported for smooth boundary conditions. Finally, we highlight a few features that are common to attractive colloidal gels and to solid materials by discussing our results in the framework of theoretical approaches of solid rupture (kinetic, fiber bundle, and transient network models).

  19. SU-E-T-602: Beryllium Seeds Implant for Photo-Neutron Yield Using External Beam Therapy

    SciTech Connect (OSTI)

    Koren, S; Veltchev, I; Furhang, E

    2014-06-01

    Purpose: To evaluate the Neutron yield obtained during prostate external beam irradiation. Methods: Neutrons, that are commonly a radiation safety concern for photon beams with energy above 10 MV, are induced inside a PTV from Beryllium implemented seeds. A high megavoltage photon beam delivered to a prostate will yield neutrons via the reaction Be-9(?,n)2?. Beryllium was chosen for its low gamma,n reaction cross-section threshold (1.67 MeV) to be combined with a high feasible 25 MV photon beam. This beam spectra has a most probable photon energy of 2.5 to 3.0 MeV and an average photon energy of about 5.8 MeV. For this feasibility study we simulated a Beryllium-made common seed dimension (0.1 cm diameter and 0.5 cm height) without taking into account encapsulation. We created a 0.5 cm grid loading pattern excluding the Urethra, using Variseed (Varian inc.) A total of 156 seeds were exported to a 4cm diameter prostate sphere, created in Fluka, a particle transport Monte Carlo Code. Two opposed 25 MV beams were simulated. The evaluation of the neutron dose was done by adjusting the simulated photon dose to a common prostate delivery (e.g. 7560 cGy in 42 fractions) and finding the corresponding neutron dose yield from the simulation. A variance reduction technique was conducted for the neutrons yield and transported. Results: An effective dose of 3.65 cGy due to neutrons was found in the prostate volume. The dose to central areas of the prostate was found to be about 10 cGy. Conclusion: The neutron dose yielded does not justify a clinical implant of Beryllium seeds. Nevertheless, one should investigate the Neutron dose obtained when a larger Beryllium loading is combined with commercially available 40 MeV Linacs.

  20. Maximizing the ExoEarth candidate yield from a future direct imaging mission

    SciTech Connect (OSTI)

    Stark, Christopher C.; Roberge, Aki; Mandell, Avi; Robinson, Tyler D.

    2014-11-10

    ExoEarth yield is a critical science metric for future exoplanet imaging missions. Here we estimate exoEarth candidate yield using single visit completeness for a variety of mission design and astrophysical parameters. We review the methods used in previous yield calculations and show that the method choice can significantly impact yield estimates as well as how the yield responds to mission parameters. We introduce a method, called Altruistic Yield Optimization, that optimizes the target list and exposure times to maximize mission yield, adapts maximally to changes in mission parameters, and increases exoEarth candidate yield by up to 100% compared to previous methods. We use Altruistic Yield Optimization to estimate exoEarth candidate yield for a large suite of mission and astrophysical parameters using single visit completeness. We find that exoEarth candidate yield is most sensitive to telescope diameter, followed by coronagraph inner working angle, followed by coronagraph contrast, and finally coronagraph contrast noise floor. We find a surprisingly weak dependence of exoEarth candidate yield on exozodi level. Additionally, we provide a quantitative approach to defining a yield goal for future exoEarth-imaging missions.

  1. EXPERIMENT 6101 STANDARD NAVY YIELD TEST DATE 06/06/06 ENTRY NAMES NO. YIELD CWT 100 SEED DAYS TO DAYS TO LODGING HEIGHT DES.

    E-Print Network [OSTI]

    EXPERIMENT 6101 STANDARD NAVY YIELD TEST DATE 06/06/06 ENTRY NAMES NO. YIELD CWT 100 SEED DAYS.9 50.0 4.1 #12;EXPERIMENT 6101 STANDARD NAVY YIELD TEST DATE 06/06/06 ENTRY NAMES NO. YIELD CWT 100*6/CN49-242 NAVY GENTEC, VISTA 3 25.8 17.9 42.7 88.8 2.0 50.0 3.9 N05305 N00838/B98304//N00792 44 25

  2. Analytical estimation of neutron yield in a micro gas-puff X pinch

    SciTech Connect (OSTI)

    Derzon, M. S.; Galambos, P. C. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States); Hagen, E. C. [NSTec, North Las Vegas, Nevada 89031 (United States)

    2012-12-01

    In this paper, we present the basic concepts for developing a micro x pinch as a small-scale neutron source. For compact sources, these concepts offer repetitive function at higher yields and pulsing rates than competing methods. The uniqueness of these concepts arises from the use of microelectronic technology to reduce the size of the target plasma and to efficiently heat the target gas. The use of repetitive microelectromechanical systems (MEMs) gas puff technology, as compared to cryogenic wires or solid targets (for the beam-target alternatives), has the potential to be robust and have a long lifetime because the plasma is not created from solid surfaces. The modeling suggests that a 50 J at the wall plug pulse could provide >10{sup 5} tritium (DT) neutrons and 10{sup 3} deuterium (DD) neutrons at temperatures of a few keV. At 1 kHz, this would be >10{sup 8} and 10{sup 6} neutrons per second, DT and DD, respectively, with a 250 {mu}m anode-cathode gap. DT gas puff devices may provide >10{sup 12} neutrons/s operating at 1 kHz and requiring 100 kW. The MEMs approach offers potentially high pulse rates and yields.

  3. Research on the secondary electron yield of tizrv-pd thin film coatings

    E-Print Network [OSTI]

    Wang, Jie; Zhang, Bo; Wang, Yong; Wei, Wei

    2015-01-01

    In particle accelerators, the build-up of electron cloud may have important influence on beam quality. Especially for the positron and proton accelerators, massive electrons lead to electron cloud, which affects the stability, energy, emittance and beam life adversely. A secondary electron emission (SEE) measurement system has been designed and used to study the SEE of palladium (Pd), TiZrV and TiZrV-Pd with an independently adjustable energy from 50 eV to 5 keV. Here, we obtained the characteristics of the SEE from Pd, TiZrV and TiZrV-Pd film coatings with different thickness under ultrahigh-vacuum (UHV) conditions. Moreover, the maximum secondary electron yield (SEY), {\\delta}max, of the Pd, TiZrV and TiZrV-Pd film coatings under different primary electron doses were obtained, respectively. Finally, the variation of the secondary electron yield with the incident electron energy will be discussed for Pd, TiZrV and TiZrV-Pd thin film coatings. Low SEY is a new advantage of TiZrV-Pd films, besides high H2 abso...

  4. X-ray power and yield measurements at the refurbished Z machine

    SciTech Connect (OSTI)

    Jones, M. C., E-mail: micjone@sandia.gov; Ampleford, D. J.; Cuneo, M. E.; Hohlfelder, R.; Jennings, C. A.; Johnson, D. W.; Jones, B.; Lopez, M. R.; MacArthur, J.; Mills, J. A.; Preston, T.; Rochau, G. A.; Savage, M.; Spencer, D.; Sinars, D. B.; Porter, J. L. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

    2014-08-15

    Advancements have been made in the diagnostic techniques to measure accurately the total radiated x-ray yield and power from z-pinch implosion experiments at the Z machine with high accuracy. The Z machine is capable of outputting 2 MJ and 330 TW of x-ray yield and power, and accurately measuring these quantities is imperative. We will describe work over the past several years which include the development of new diagnostics, improvements to existing diagnostics, and implementation of automated data analysis routines. A set of experiments on the Z machine were conducted in which the load and machine configuration were held constant. During this shot series, it was observed that the total z-pinch x-ray emission power determined from the two common techniques for inferring the x-ray power, a Kimfol filtered x-ray diode diagnostic and the total power and energy diagnostic, gave 449 TW and 323 TW, respectively. Our analysis shows the latter to be the more accurate interpretation. More broadly, the comparison demonstrates the necessity to consider spectral response and field of view when inferring x-ray powers from z-pinch sources.

  5. Comprehensive Measurement of Neutron Yield Produced by 62 MeV Protons on Beryllium Target

    E-Print Network [OSTI]

    M. Osipenko; M. Ripani; R. Alba; G. Ricco; M. Schillaci; M. Barbagallo; P. Boccaccio; A. Celentano; N. Colonna; L. Cosentino; A. Del Zoppo; A. Di Pietro; J. Esposito; P. Figuera; P. Finocchiaro; A. Kostyukov; C. Maiolino; D. Santonocito; V. Scuderi; C. M. Viberti

    2013-06-28

    A low-power prototype of neutron amplifier, based on a 70 MeV, high current proton cyclotron being installed at LNL for the SPES RIB facility, was recently proposed within INFN-E project. This prototype uses a thick Beryllium converter to produce a fast neutron spectrum feeding a sub-critical reactor core. To complete the design of such facility the new measurement of neutron yield from a thick Beryllium target was performed at LNS. This measurement used liquid scintillator detectors to identify produced neutrons by Pulse Shape Discrimination and Time of Flight technique to measure neutron energy in the range 0.5-62 MeV. To extend the covered neutron energy range He3 detector was used to measure neutrons below 0.5 MeV. The obtained yields were normalized to the charge deposited by the proton beam on the metallic Beryllium target. These techniques allowed to achieve a wide angular coverage from 0 to 150 degrees and to explore almost complete neutron energy interval.

  6. Comprehensive Measurement of Neutron Yield Produced by 62 MeV Protons on Beryllium Target

    E-Print Network [OSTI]

    Osipenko, M; Alba, R; Ricco, G; Schillaci, M; Barbagallo, M; Boccaccio, P; Celentano, A; Colonna, N; Cosentino, L; Del Zoppo, A; Di Pietro, A; Esposito, J; Figuera, P; Finocchiaro, P; Kostyukov, A; Maiolino, C; Santonocito, D; Scuderi, V; Viberti, C M

    2013-01-01

    A low-power prototype of neutron amplifier, based on a 70 MeV, high current proton cyclotron being installed at LNL for the SPES RIB facility, was recently proposed within INFN-E project. This prototype uses a thick Beryllium converter to produce a fast neutron spectrum feeding a sub-critical reactor core. To complete the design of such facility the new measurement of neutron yield from a thick Beryllium target was performed at LNS. This measurement used liquid scintillator detectors to identify produced neutrons by Pulse Shape Discrimination and Time of Flight technique to measure neutron energy in the range 0.5-62 MeV. To extend the covered neutron energy range He3 detector was used to measure neutrons below 0.5 MeV. The obtained yields were normalized to the charge deposited by the proton beam on the metallic Beryllium target. These techniques allowed to achieve a wide angular coverage from 0 to 150 degrees and to explore almost complete neutron energy interval.

  7. Hydropower Upgrades to Yield Added Generation at Average Costs...

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

    selections announced today will deploy innovative technologies such as high-efficiency, fish-friendly turbines, improved water intakes, and advanced control systems in order to...

  8. Combining Low-Temperature Combustion with Lean-NOx Trap Yields...

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

    Low-Temperature Combustion with Lean-NOx Trap Yields Progress Toward Targets of Efficient NOx Control for Diesels Combining Low-Temperature Combustion with Lean-NOx Trap Yields...

  9. Mechanisms for Tropical Tropospheric Circulation Change in Response to Global Warming*

    E-Print Network [OSTI]

    Xie, Shang-Ping

    Mechanisms for Tropical Tropospheric Circulation Change in Response to Global Warming* JIAN MA change in global warming is studied by comparing the response of an atmospheric general circulation model globally in response to SST warming. A diagnostic framework is developed based on a linear baroclinic model

  10. Early Cretaceous benthic associations (foraminifera and calcareous algae) of a shallow tropical-water platform

    E-Print Network [OSTI]

    Husinec, Antun

    Early Cretaceous benthic associations (foraminifera and calcareous algae) of a shallow tropical of benthic foraminifera and calcareous algae in order to establish a precise, combined benthic biozonation species of calcareous algae, distributed among 11 genera, were recovered from the Lower Cretaceous shallow

  11. The Response of Quasigeostrophic Oceanic Vortices to Tropical Cyclone Forcing BENJAMIN JAIMES AND LYNN K. SHAY

    E-Print Network [OSTI]

    Miami, University of

    . Idealized oceanic currents and wind fields derived from observational data acquired during Hurricane Katrina of wind-driven acceleration of oceanic mixed layer (OML) currents rather than a function of the windThe Response of Quasigeostrophic Oceanic Vortices to Tropical Cyclone Forcing BENJAMIN JAIMES

  12. Momentum Flux Budget across the AirSea Interface under Uniform and Tropical Cyclone Winds

    E-Print Network [OSTI]

    Rhode Island, University of

    into ocean currents is equal to the flux from air (wind stress). However, when the surface wave field grows into currents under TCs. 1. Introduction The passage of a tropical cyclone (TC) over a warm ocean represents one is mainly due to the vertical turbulent mixing induced by the strong momentum flux into ocean currents

  13. On the interaction of Tropical Cyclone Flossie and emissions from Hawaii's Kilauea volcano

    E-Print Network [OSTI]

    Businger, Steven

    On the interaction of Tropical Cyclone Flossie and emissions from Hawaii's Kilauea volcano Andre Pattantyus1 and Steven Businger1 1 Department of Meteorology, University of Hawai`i at Mnoa, Honolulu, Hawaii et al. [2013]. Given the persistent northeast trade winds in Hawai`i, the emissions cause frequent

  14. Passive microwave observations of mesoscale convective systems over the tropical Pacific Ocean 

    E-Print Network [OSTI]

    McGaughey, Gary Rae

    1994-01-01

    the Advanced Microwave Precipitation Radiometer (AMPR) aboard the NASA ER2 during the Tropical Ocean and Global Atmosphere Coupled-Ocean Atmosphere Response Experiment (TOGA-COARE). The AMPR measures linearly polarized radiation at 10.7, 19.35, 37. 1, and 85...

  15. 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 Vænge 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

  16. The QBO's influence on lightning production and deep convection in the tropics 

    E-Print Network [OSTI]

    Hernandez, Celina Anne

    2009-05-15

    . THE QBO?S INFLUENCE ON LIGHTING PRODUCTION IN THE TROPICS ................................................................................................................ 10 3.1 Africa... lightning flash densities observed over land (Fig.8). Therefore, this analysis focuses on four land regions: Africa, India, Maritime continent/Australia, and South America. 3.1 Africa West minus east flash density anomalies for DJF (Fig. 9a) show...

  17. Impact of tropical cyclones on the ocean heat budget in the Bay of Bengal during 1999

    E-Print Network [OSTI]

    Han, Weiqing

    ­November in 1999 on the Bay of Bengal (BoB) heat budget are examined using the Hybrid Coordinate Ocean Model estimates using previously published methods based on surface observations. The relatively weak heat pumping pumping (DOHP) by tropical cyclones (TCs), which mea- sures the amount of heat that is pumped down from

  18. The relationship between wood density and mortality in a global tropical forest data set

    E-Print Network [OSTI]

    Kraft, Nathan

    The relationship between wood density and mortality in a global tropical forest data set Nathan J-offs, long-term ecological research, phylogenetic independent contrasts, trait conservatism. Summary · Wood in mortality rates with wood density, drawing on data for 765 500 trees from 1639 species at 10 sites located

  19. Available online at www.sciencedirect.com The carbon balance of tropical forest regions, 19902005

    E-Print Network [OSTI]

    Malhi, Yadvinder

    the biosphere to the atmosphere, through the combustion and decomposition of vegetation biomass. The exact of knowledge of the carbon balance of the tropical bio- sphere, looking at both CO2 emissions from land use, principally because they contain the more substantial biomass carbon stocks, but also because so few data

  20. Low energy architecture in the tropics: from design to building construction

    E-Print Network [OSTI]

    Harry Boyer; Frédéric Miranville; François Payet

    2012-12-23

    This paper presents a realization of passive construction in Reunion, French Department in the Indian Ocean (southern hemisphere) submitted to a wet tropical climate. Aspects of passive construction were integrated at the design stage and this house does not present additional costs towards classical ones. This project was awarded a prize for architecture climate.

  1. Using Objective Analyses (H*Wind) in Tropical Cyclone Wind Vector Verification Christopher C. Hennon

    E-Print Network [OSTI]

    Hennon, Christopher C.

    of the wind field from Hurricane Katrina (2005) while in the Gulf of Mexico. Figure 4 is a plot of the dataUsing Objective Analyses (H*Wind) in Tropical Cyclone Wind Vector Verification Christopher C Florida to verify a new QuikSCAT wind retrieval algorithm ("Q-wind"). We are performing point to point

  2. Tropical Moored Buoy Implementation Panel (TIP) Report M. J. McPhaden, NOAA/PMEL

    E-Print Network [OSTI]

    Tropical Moored Buoy Implementation Panel (TIP) Report M. J. McPhaden, NOAA/PMEL Prepared of physical, chemical and biological parameters made on repeat routine buoy serving cruises. These cruises a convenient platform for buoy, drifter and weather balloon launches and other measurement activities

  3. FORECASTING OF ATLANTIC TROPICAL CYCLONES USING A KILO-MEMBER ENSEMBLE

    E-Print Network [OSTI]

    Schubert, Wayne H.

    system using an efficient multigrid barotropic vorticity equation model (MBAR). Five perturbation classes Advisor Department Head ii #12;ABSTRACT OF THESIS FORECASTING OF ATLANTIC TROPICAL CYCLONES USING A KILO forecasts. These increases have been largely driven by improved numerical weather prediction models

  4. Hybrid coupled models of the tropical Paci c | II ENSO prediction

    E-Print Network [OSTI]

    Hsieh, William

    Hybrid coupled models of the tropical Paci#12;c | II ENSO prediction by Youmin Tang 1 , William W: ytang@cims.nyu.edu #12; Abstract Two hybrid coupled models (HCMs), a dynamical ocean model coupled Introduction Models for ENSO prediction can be categorized into purely statistical models, hybrid coupled

  5. ECOLOGICAL AND ECONOMIC SUSTAINABILITY OF TROPICAL REEF SYSTEMS: ESTABLISHING SUSTAINABLE TOURISM IN THE EXUMA CAYS, BAHAMAS

    E-Print Network [OSTI]

    Sealey, Kathleen Sullivan

    ECOLOGICAL AND ECONOMIC SUSTAINABILITY OF TROPICAL REEF SYSTEMS: ESTABLISHING SUSTAINABLE TOURISM destination in the wider Carib- bean and entertains two tourism markets: 1) cruise ship and resort (overnight to that which will sustain rather than destroy the environment, the very product marketed and sought. In order

  6. Optimizing turbine withdrawal from a tropical reservoir for improved water quality in downstream wetlands

    E-Print Network [OSTI]

    Wehrli, Bernhard

    Optimizing turbine withdrawal from a tropical reservoir for improved water quality in downstream using Itezhi-Tezhi Reservoir (Zambia) as a model system aims at defining optimized turbine withdrawal. The water depth of turbine withdrawals was varied in a set of simulations to optimize outflow water quality

  7. Characterization of Throughfall Heterogeneity in a Tropical Pre-Montane Could Forest in Costa Rica 

    E-Print Network [OSTI]

    Berger, Amelie Cecile

    2013-09-26

    of this study, rain gauge networks were deployed in a 2.2-hectare watershed within a tropical pre-montane transitional cloud forest in Costa Rica. Throughfall data were collected daily for a total of 39 events from 28 June–17 July 2012 and 12 June–16 July 2013...

  8. Pelagic and coastal sources of P wave microseisms: Generation under tropical cyclones

    E-Print Network [OSTI]

    Gerstoft, Peter

    Pelagic and coastal sources of P wave microseisms: Generation under tropical cyclones Jian Zhang,1 2010; published 6 August 2010. [1] Nonlinear wave wave interactions generate double frequency (DF it is unclear whether DF surface waves generated in deep oceans are observed on land, we show that beamforming

  9. South temperate birds have higher apparent adult survival than tropical birds in Africa

    E-Print Network [OSTI]

    Martin, Thomas E.

    493 South temperate birds have higher apparent adult survival than tropical birds in Africa PennPatrick Inst., DST/NRF Centre of Excellence, Univ. of Cape Town, P/Bag X3, Rondebosch, 7701, South Africa African National Biodiversity Inst., P/Bag X7, Claremont 7735, South Africa, and School of Statistics

  10. Presentation 2.6: Wood waste for energy: lessons learnt from tropical regions Paul Vantomme

    E-Print Network [OSTI]

    the production chain MalaysiaResearch and development in energy alternative from biomass through briquetting and forest industries GhanaDevelopment of energy alternatives for the efficient utilization of woodPresentation 2.6: Wood waste for energy: lessons learnt from tropical regions Paul Vantomme

  11. Influence of compost on soil organic matter quality under tropical conditions

    E-Print Network [OSTI]

    Ma, Lena

    Influence of compost on soil organic matter quality under tropical conditions Carmen Riveroa , T was conducted in Puerto Rico to evaluate the impact of compost on soil quality and crop production in an ultisol. In particular, the effect of compost on the quality of soil organic mater (SOM) was investigated. Compost

  12. Regional climate responses to geoengineering with tropical and Arctic SO2 injections

    E-Print Network [OSTI]

    Robock, Alan

    insolation and cool Earth, has been suggested as an emergency response to geoengineer the planet in response aerosols cooling the planet, the volcano analog actually argues against geoengineering because of ozone2 into the lower stratosphere, it would produce global cooling. Tropical SO2 injection would produce

  13. ORIGINAL PAPER Soil aggregates in a tropical deciduous forest: effects on C

    E-Print Network [OSTI]

    Forney, Larry J.

    within soil micro- and macro-aggregates in a tropical deciduous forest in Me´xico. We measured, for three nutrients dynamics. Keywords Macro-aggregates Á Micro-aggregates Á Mexico Á Soil bacteria Á t, Instituto de Ecologi´a, Universidad Nacional Auto´noma de Me´xico, Me´xico, D.F., Me´xico L. J. Forney

  14. Validation of Atmospheric Infrared Sounder temperature and moisture profiles over tropical oceans and their impact

    E-Print Network [OSTI]

    Pu, Zhaoxia

    ] Tropical cyclones are one of the costliest and deadliest natural disasters in the United States and other the potential for economic damage and deaths. However, due to the lack of the conventional observations over/I satellite rainfall rates results in improvements in hurricane track forecasts in the GEOS global model [Hou

  15. Nitrogen management is essential to prevent tropical oil palm plantations from causing ground-level

    E-Print Network [OSTI]

    on the assumption that palm oil is an ``environmentally friendly'' fuel feedstock. Here we show, using measurementsNitrogen management is essential to prevent tropical oil palm plantations from causing ground the Industrial Revolution. Among the most widespread trop- ical crops is oil palm (Elaeis guineensis): global

  16. Increased sensitivity of tropical cyclogenesis to wind shear in higher SST environments

    E-Print Network [OSTI]

    Nolan, David S.

    Increased sensitivity of tropical cyclogenesis to wind shear in higher SST environments David S in environments of radiative- convective equilibrium (RCE) generated by the same model. This method is extended to allow for the incorporation of mean wind shear into the RCE states, thus providing much more realistic

  17. Wintertime observations of SubTropical Mode Water formation within the Gulf Stream

    E-Print Network [OSTI]

    Joyce, Terrence M.

    Wintertime observations of SubTropical Mode Water formation within the Gulf Stream Terrence M) within the eastward-flowing Gulf Stream as it forms during strong winter cooling. Shipboard observations that the deepest wintertime mixed layers (MLs) of EDW were found immediately south of the GS, and the distribution

  18. Tropical cyclones and permanent El Nino in the early Pliocene epoch

    E-Print Network [OSTI]

    Fedorov, Alexey V.

    Tropical cyclones (also known as hurricanes and typhoons) are now believed to be an important component of the Earth’s climate system1, 2, 3. In particular, by vigorously mixing the upper ocean, they can affect the ocean’s ...

  19. A coupled model study of the remote influence of enso on tropical Atlantic sst variability 

    E-Print Network [OSTI]

    Fang, Yue

    2006-08-16

    To investigate the tropical Atlantic response to the remote El Nino-Southern Oscillation (ENSO) forcing, a Reduced Physics Â? Coupled Global Circulation Model (RP-CGCM) is developed, and four experiments are carried out. The results show that the RP...

  20. Tropical Cyclone Energy Dispersion in a Three-Dimensional Primitive Equation Model: Upper-Tropospheric Influence*

    E-Print Network [OSTI]

    Wang, Yuqing

    The three-dimensional (3D) Rossby wave energy dispersion of a tropical cyclone (TC) is studied using of the beta effect. A synoptic-scale wave train forms in its wake a few days later. The energy energy. Because of the vertical differential inertial stability, the upper-level wave train develops

  1. Reproducibility by Climate Models of Cloud Radiative Forcing Associated with Tropical Convection

    E-Print Network [OSTI]

    Masunaga, Hirohiko

    for monthly mean data from twentieth-century simulations of 18 climate models participating in phase 3 perturbation is thus fundamental for our understanding of climate change, but shows no consistency in eitherReproducibility by Climate Models of Cloud Radiative Forcing Associated with Tropical Convection

  2. Radiative Energy Balance in the Tropical Tropopause Layer: An Investigation with ARM Data

    SciTech Connect (OSTI)

    Fu, Qiang

    2013-10-22

    The overall objective of this project is to use the ARM observational data to improve our understanding of cloud-radiation effects in the tropical tropopause layer (TTL), which is crucial for improving the simulation and prediction of climate and climate change. In last four and half years, we have been concentrating on (i) performing the comparison of the ice cloud properties from the ground-based lidar observations with those from the satellite CALIPSO lidar observations at the ARM TWP sites; (ii) analyzing TTL cirrus and its relation to the tropical planetary waves; (iii) calculating the radiative heating rates using retrieved cloud microphysical properties by combining the ground-based lidar and radar observations at the ARM TWP sites and comparing the results with those using cloud properties retrieved from CloudSat and CALIPSO observations; (iv) comparing macrophysical properties of tropical cirrus clouds from the CALIPSO satellite and from ground-based micropulse and Raman lidar observations; (v) improving the parameterization of optical properties of cirrus clouds with small effective ice particle sizes; and (vi) evaluating the enhanced maximum warming in the tropical upper troposphere simulated by the GCMs. The main results of our research efforts are reported in the 12 referred journal publications that acknowledge the DOE Grant No. DE-FG02-09ER64769.

  3. Limited sampling hampers "big data" estimation of species richness in a tropical biodiversity hotspot

    E-Print Network [OSTI]

    Schierup, Mikkel Heide

    and future of the world's biodiversity in the face of human-induced climate and land-use change has focussedLimited sampling hampers "big data" estimation of species richness in a tropical biodiversity by the National Center for Ecological Analysis and Synthesis, a center funded by the National Science Foundation

  4. Diurnal cycle of liquid water path over the subtropical and tropical oceans

    E-Print Network [OSTI]

    Hartmann, Dennis

    (Tropical Rainfall Measuring Mission Microwave Imager) satellite microwave radiometer data. Diurnal, consistent with a diurnal cycle driven largely by cloud solar absorption. In deep convective regions [1995] examined a two-point sampling of the LWP diurnal cycle of using the special sensor microwave

  5. Diurnal cycle of liquid water path over the subtropical and tropical oceans

    E-Print Network [OSTI]

    Wood, Robert

    (Tropical Rainfall Measuring Mission Microwave Imager) satellite microwave radiometer data. Diurnal, consistent with a diurnal cycle driven largely by cloud solar absorption. In deep convective regions], using a 17 day period of near-continuous ground based microwave radio- meter data around the time

  6. The depth of the tropical Pacific Ocean's warm surface layer shrank during the last three

    E-Print Network [OSTI]

    Yanik, Mehmet Fatih

    The depth of the tropical Pacific Ocean's warm surface layer shrank during the last three decades Pacific Ocean, off an island in Palau. They analysed the ratio of nitrogen and carbon isotopes.1029/2010GL044867 (2010) OceanOgraphy Cold water rising in the Pacific DrUg DeVeLOpMenT Worm surgery on a chip

  7. Organisation of the soil mantle in tropical southeastern Brazil (Serra do Mar)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Organisation of the soil mantle in tropical southeastern Brazil (Serra do Mar) in relation-900 Sao Paulo ­ SP, Brazil And INRA-ENSA. Laboratoire des sciences du sol 65 rue de St Brieuc 35042 RennesORSTOM - Instituto de geociencias - DGG ­ USP C.P. 11 348 Cep: 05 422-970 Sao Paulo ­ SP, Brazil Correspondence

  8. Predicting species diversity in tropical forests Joshua B. Plotkina,b

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    of Malaysia, Kepong, Malaysia 52109; kSarawak Forestry Department, Kuching, Sarawak, Malaysia SW 93750; and l to the size of the area raised to some exponent. The exponent often turns out to be roughly 1 4. This power, individually identified trees from five tropical forests on three continents. Although the power law

  9. Effect of Convective Entrainment/Detrainment on the Simulation of the Tropical Precipitation Diurnal Cycle*

    E-Print Network [OSTI]

    Wang, Yuqing

    Effect of Convective Entrainment/Detrainment on the Simulation of the Tropical Precipitation the effect of assumed fractional convective entrainment/detrainment rates in the Tiedtke mass flux convective measurements. In a control experiment with the default fractional convective entrainment/detrainment rates

  10. Using lightweight unmanned aerial vehicles to monitor tropical forest Rakan A. Zahawi a,

    E-Print Network [OSTI]

    Ellis, Erle C.

    Using lightweight unmanned aerial vehicles to monitor tropical forest recovery Rakan A. Zahawi a from lightweight unmanned aerial vehicles (UAV) are a cost-effective substitute for tradi- tional field Rica. Ecosynth methods combine aerial images from consumer-grade digital cameras with com- puter vision

  11. Low energy architecture in the tropics: from design to building construction

    E-Print Network [OSTI]

    Boyer, Harry; Payet, François

    2012-01-01

    This paper presents a realization of passive construction in Reunion, French Department in the Indian Ocean (southern hemisphere) submitted to a wet tropical climate. Aspects of passive construction were integrated at the design stage and this house does not present additional costs towards classical ones. This project was awarded a prize for architecture climate.

  12. Mesoscale eddies in the northeastern Pacific tropical-subtropical transition zone: Statistical characterization from satellite altimetry

    E-Print Network [OSTI]

    Mesoscale eddies in the northeastern Pacific tropical-subtropical transition zone: Statistical February 2012; revised 24 August 2012; accepted 6 September 2012; published 24 October 2012. [1] Mesoscale cycle. Although mesoscale eddies in these areas have been previously reported, this study provides

  13. Intervention Analysis of Hurricane Effects on Snail Abundance in a Tropical Forest Using

    E-Print Network [OSTI]

    Willig, Michael

    Intervention Analysis of Hurricane Effects on Snail Abundance in a Tropical Forest Using Long disturbances, such as hurricanes, have profound effects on pop- ulations, either directly by causing mortality of resources. In the last 20 years, two major disturbances, Hurricane Hugo in 1989 and Hurricane Georges

  14. NEANDC specialists meeting on yields and decay data of fission product nuclides

    SciTech Connect (OSTI)

    Chrien, R.E.; Burrows, T.W. (eds.)

    1983-01-01

    Separate abstracts were prepared for the 29 papers presented. Workshop reports on decay heat, fission yields, beta- and gamma-ray spectroscopy, and delayed neutrons are included. An appendix contains a survey of the most recent compilations and evaluations containing fission product yield, fission product decay data, and delayed neutron yield information. (WHK)

  15. The Current State of Casting Yield: Results from the 1997 Steel Founders'

    E-Print Network [OSTI]

    Beckermann, Christoph

    The Current State of Casting Yield: Results from the 1997 Steel Founders' Society of America Casting Yield Survey Richard A. Hardin - Research Engineer Christoph Beckermann - Professor Solidification The results of a casting yield survey of steel foundries taken in the first quarter of 1997 are presented

  16. What Is Well Yield? Private wells are frequently drilled in rural areas to

    E-Print Network [OSTI]

    Danforth, Bryan Nicholas

    1 What Is Well Yield? Private wells are frequently drilled in rural areas to supply water lowering the water level in the borehole below the pump intake is called the well yield. Low-yielding wells are generally considered wells that cannot meet the peak water demand for the home or farm. This fact sheet

  17. Yield Enhancement of Digital Microfluidics-Based Biochips Using Space Redundancy and Local Reconfiguration*

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    Yield Enhancement of Digital Microfluidics-Based Biochips Using Space Redundancy and Local to avoid faulty elements. Digital microfluidics- based biochips are also amenable to redundancy-based yield. As microfluidics-based biochips become more complex, manufacturing yield will have significant influence

  18. NOAA Technical Memorandum NMFS-SEFSC-570 ESTIMATION OF EFFORT, MAXIMUM SUSTAINABLE YIELD, AND MAXIMUM

    E-Print Network [OSTI]

    , AND MAXIMUM ECONOMIC YIELD IN THE SHRIMP FISHERY OF THE GULF OF MEXICO BY JAMES NANCE, WALTER KEITHLY, JR YIELD, AND MAXIMUM ECONOMIC YIELD IN THE SHRIMP FISHERY OF THE GULF OF MEXICO BY JAMES NANCE, WALTER in the shrimp fishery of the Gulf of Mexico. NOAA Technical Memorandum NMFS-SEFSC-570, 71P. Copies may

  19. Spatial stochastic processes for yield and reliability management with applications to nano electronics 

    E-Print Network [OSTI]

    Hwang, Jung Yoon

    2005-02-17

    . . . . . . . . . . . . . . . . . . . . . . . . . 30 IV YIELD MODELING OF INTEGRATED CIRCUITS BASED ON SPATIAL NONHOMOGENEOUS POISSON PRO- CESS : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 31 IV.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 31 IV.2. Yield model... and gamma distribution(? = 2) : : : : : : : : : : : : : 18 5 Yield models : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 19 6 Bathtub-shaped failure rate curve : : : : : : : : : : : : : : : : : : : : 26 7 Simulated defects...

  20. Plastic yield inception of an indented coated flat and comparison with a flattened coated sphere

    E-Print Network [OSTI]

    Siegel, Paul H.

    . Introduction In many engineering applications, such as cutting tools, hard disk drives and electrical circuitsPlastic yield inception of an indented coated flat and comparison with a flattened coated sphere Keywords: Spherical indentation Hard coating Yield inception a b s t r a c t The yield inception