National Library of Energy BETA

Sample records for test large-scale wind

  1. VP 100: New Facility in Boston to Test Large-Scale Wind Blades

    Broader source: Energy.gov [DOE]

    Thanks in part to funding from the Recovery Act, the Wind Technology Testing Center in Massachusetts will be first in the U.S. to test wind turbine blades up to 300 feet in length -- creating 300 construction jobs and 30 permanent design jobs in the process.

  2. POWER SYSTEMS STABILITY WITH LARGE-SCALE WIND POWER PENETRATION

    E-Print Network [OSTI]

    Bak-Jensen, Birgitte

    of offshore wind farms, wind power fluctuations may introduce several challenges to reliable power system behaviour due to natural wind fluctuations. The rapid power fluctuations from the large scale wind farms Generation Control (AGC) system which includes large- scale wind farms for long-term stability simulation

  3. Large-Scale Wind Training Program

    SciTech Connect (OSTI)

    Porter, Richard L. [Hudson Valley Community College

    2013-07-01

    Project objective is to develop a credit-bearing wind technician program and a non-credit safety training program, train faculty, and purchase/install large wind training equipment.

  4. Superconductivity for Large Scale Wind Turbines

    SciTech Connect (OSTI)

    R. Fair; W. Stautner; M. Douglass; R. Rajput-Ghoshal; M. Moscinski; P. Riley; D. Wagner; J. Kim; S. Hou; F. Lopez; K. Haran; J. Bray; T. Laskaris; J. Rochford; R. Duckworth

    2012-10-12

    A conceptual design has been completed for a 10MW superconducting direct drive wind turbine generator employing low temperature superconductors for the field winding. Key technology building blocks from the GE Wind and GE Healthcare businesses have been transferred across to the design of this concept machine. Wherever possible, conventional technology and production techniques have been used in order to support the case for commercialization of such a machine. Appendices A and B provide further details of the layout of the machine and the complete specification table for the concept design. Phase 1 of the program has allowed us to understand the trade-offs between the various sub-systems of such a generator and its integration with a wind turbine. A Failure Modes and Effects Analysis (FMEA) and a Technology Readiness Level (TRL) analysis have been completed resulting in the identification of high risk components within the design. The design has been analyzed from a commercial and economic point of view and Cost of Energy (COE) calculations have been carried out with the potential to reduce COE by up to 18% when compared with a permanent magnet direct drive 5MW baseline machine, resulting in a potential COE of 0.075 $/kWh. Finally, a top-level commercialization plan has been proposed to enable this technology to be transitioned to full volume production. The main body of this report will present the design processes employed and the main findings and conclusions.

  5. Aalborg Universitet Optimal Selection of AC Cables for Large Scale Offshore Wind Farms

    E-Print Network [OSTI]

    Hu, Weihao

    Aalborg Universitet Optimal Selection of AC Cables for Large Scale Offshore Wind Farms Hou, Peng Cables for Large Scale Offshore Wind Farms. In Proceedings of the 40th Annual Conference of IEEE of AC Cables for Large Scale Offshore Wind Farms Peng Hou, Weihao Hu, Zhe Chen Department of Energy

  6. The influence of large-scale wind power on global climate

    E-Print Network [OSTI]

    Barlaz, Morton A.

    The influence of large-scale wind power on global climate David W. Keith* , Joseph F. De, CA, September 19, 2004 (received for review April 16, 2004) Large-scale use of wind power can alter of wind power at regional to global scales by using two general circulation models and several

  7. Large-scale Offshore Wind Power in the United States. Assessment of Opportunities and Barriers

    SciTech Connect (OSTI)

    Musial, Walter; Ram, Bonnie

    2010-09-01

    This report describes the benefits of and barriers to large-scale deployment of offshore wind energy systems in U.S. waters.

  8. Potential Climatic Impacts and Reliability of Very Large-Scale Wind Farms

    E-Print Network [OSTI]

    Wang, Chien

    Meeting future world energy needs while addressing climate change requires large-scale deployment of low or zero greenhouse gas (GHG) emission technologies such as wind energy. The widespread availability of wind power has ...

  9. Large-scale structure of the fast solar wind

    E-Print Network [OSTI]

    Bisi, M. M.; Fallows, R. A.; Breen, A. R.; Habbal, S. Rifai; Jones, R. A.

    2007-01-01

    to detect small variations in the fast solar wind struc-small-scale (?100 km) density variations in the solar wind.small step in density seen in the Ulysses data indicated the presence of two modes of fast wind,

  10. Large-scale structure of the fast solar wind

    E-Print Network [OSTI]

    Bisi, M. M.; Fallows, R. A.; Breen, A. R.; Habbal, S. Rifai; Jones, R. A.

    2007-01-01

    measurements of Solar Wind velocity, in press, Journal of1992), The Ulysses solar wind plasma experiment, AstronomyA. Hewish (1967), The solar wind outside the plane of the

  11. Large-scale structure of the fast solar wind

    E-Print Network [OSTI]

    Bisi, M. M.; Fallows, R. A.; Breen, A. R.; Habbal, S. Rifai; Jones, R. A.

    2007-01-01

    Scintillation measurements of Solar Wind velocity, in press,K. Sakurai (1992), The Ulysses solar wind plasma experiment,Telescope for the SOHO Mission, Solar Physics, 162, 291–312.

  12. Effects of large-scale distribution of wind energy in and around Europe

    E-Print Network [OSTI]

    Effects of large-scale distribution of wind energy in and around Europe Gregor Giebel Niels Gylling Mortensen Risø National Laboratory Gregor Czisch ISET #12;Outline · How to achieve high penetrations of wind energy in Europe? · Distribution of wind energy all over Europe leads to smoothing of the wind power

  13. Aalborg Universitet Impact of Wind Shear and Tower Shadow Effects on Power System with Large Scale

    E-Print Network [OSTI]

    Hu, Weihao

    @et.aau.dk, csu@et.aau.dk, zch@et.aau.dk Abstract ­ Grid connected wind turbines are fluctuating power sources due and the power flow situation of the original power system especially when the integration of wind powerAalborg Universitet Impact of Wind Shear and Tower Shadow Effects on Power System with Large Scale

  14. Energy Policy 34 (2006) 395410 The economics of large-scale wind power in a carbon

    E-Print Network [OSTI]

    Barlaz, Morton A.

    2006-01-01

    Energy Policy 34 (2006) 395­410 The economics of large-scale wind power in a carbon constrained to supplement variable wind power output to meet a time-varying load. We find that, with somewhat optimistic cost of delivered wind power. Due to residual CO2 emissions, compressed air storage is surprisingly

  15. "Biomaterials for Use in Large Scale Wind Turbine Blades" Malia Charter

    E-Print Network [OSTI]

    Mountziaris, T. J.

    "Biomaterials for Use in Large Scale Wind Turbine Blades" Malia Charter Advising: Rachel Koh, Dr into the feasibility of using biocomposites for wind turbine blades. While bast fiber composites are also being Peggi Clouston Wind energy is growing rapidly to address concerns of non-renewable energy resources. One

  16. The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource

    E-Print Network [OSTI]

    The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource over on Wind Energy Resource over Europe and its Intermittency Pascal Kriesche* and Adam Schlosser* Abstract In times of increasing importance of wind power in the world's energy mix, this study focuses on a better

  17. The emergence of zonal ocean jets under large-scale stochastic wind forcing

    E-Print Network [OSTI]

    LaCasce, Joseph H.

    . But we will show how such forcing can in fact generate zonal jet-like structures. [5] Wind forcingThe emergence of zonal ocean jets under large-scale stochastic wind forcing Christopher H. O stochastic wind forcing is investigated. As found in many previous studies, long Rossby waves are excited

  18. Large Scale Wind and Solar Integration in Germany

    SciTech Connect (OSTI)

    Ernst, Bernhard; Schreirer, Uwe; Berster, Frank; Pease, John; Scholz, Cristian; Erbring, Hans-Peter; Schlunke, Stephan; Makarov, Yuri V.

    2010-02-28

    This report provides key information concerning the German experience with integrating of 25 gigawatts of wind and 7 gigawatts of solar power capacity and mitigating its impacts on the electric power system. The report has been prepared based on information provided by the Amprion GmbH and 50Hertz Transmission GmbH managers and engineers to the Bonneville Power Administration (BPA) and Pacific Northwest National Laboratory representatives during their visit to Germany in October 2009. The trip and this report have been sponsored by the BPA Technology Innovation office. Learning from the German experience could help the Bonneville Power Administration engineers to compare and evaluate potential new solutions for managing higher penetrations of wind energy resources in their control area. A broader dissemination of this experience will benefit wind and solar resource integration efforts in the United States.

  19. Prospects for large scale applications of wind energy

    E-Print Network [OSTI]

    generating wind turbine (1885) Historical development #12;20th century: first electricity generation USA development #12;After 1500: development of the horizontal axis mills La Cour, Askov (DK): First electricity: electricity generation DK: Gedser (1975) NL: De Traanroeier (1956) D: Hütter (1959) Historical development #12

  20. Large-Scale Spray Releases: Additional Aerosol Test Results

    SciTech Connect (OSTI)

    Daniel, Richard C.; Gauglitz, Phillip A.; Burns, Carolyn A.; Fountain, Matthew S.; Shimskey, Rick W.; Billing, Justin M.; Bontha, Jagannadha R.; Kurath, Dean E.; Jenks, Jeromy WJ; MacFarlan, Paul J.; Mahoney, Lenna A.

    2013-08-01

    One of the events postulated in the hazard analysis for the Waste Treatment and Immobilization Plant (WTP) and other U.S. Department of Energy (DOE) nuclear facilities is a breach in process piping that produces aerosols with droplet sizes in the respirable range. The current approach for predicting the size and concentration of aerosols produced in a spray leak event involves extrapolating from correlations reported in the literature. These correlations are based on results obtained from small engineered spray nozzles using pure liquids that behave as a Newtonian fluid. The narrow ranges of physical properties on which the correlations are based do not cover the wide range of slurries and viscous materials that will be processed in the WTP and in processing facilities across the DOE complex. To expand the data set upon which the WTP accident and safety analyses were based, an aerosol spray leak testing program was conducted by Pacific Northwest National Laboratory (PNNL). PNNL’s test program addressed two key technical areas to improve the WTP methodology (Larson and Allen 2010). The first technical area was to quantify the role of slurry particles in small breaches where slurry particles may plug the hole and prevent high-pressure sprays. The results from an effort to address this first technical area can be found in Mahoney et al. (2012a). The second technical area was to determine aerosol droplet size distribution and total droplet volume from prototypic breaches and fluids, including sprays from larger breaches and sprays of slurries for which literature data are mostly absent. To address the second technical area, the testing program collected aerosol generation data at two scales, commonly referred to as small-scale and large-scale testing. The small-scale testing and resultant data are described in Mahoney et al. (2012b), and the large-scale testing and resultant data are presented in Schonewill et al. (2012). In tests at both scales, simulants were used to mimic the relevant physical properties projected for actual WTP process streams.

  1. LARGE SCALE PERMEABILITY TEST OF THE GRANITE IN THE STRIPA MINE AND THERMAL CONDUCTIVITY TEST

    E-Print Network [OSTI]

    Lundstrom, L.

    2011-01-01

    No.2 LARGE SCALE PERMEABILITY TEST OF THE GRANITE' IN THEMINE AND, THERMAL CONDUCTIVITY TEST Lars Lundstrom and HakanSUMMARY REPORT Background TEST SITE Layout of test places

  2. Large-Scale Spray Releases: Initial Aerosol Test Results

    SciTech Connect (OSTI)

    Schonewill, Philip P.; Gauglitz, Phillip A.; Bontha, Jagannadha R.; Daniel, Richard C.; Kurath, Dean E.; Adkins, Harold E.; Billing, Justin M.; Burns, Carolyn A.; Davis, James M.; Enderlin, Carl W.; Fischer, Christopher M.; Jenks, Jeromy WJ; Lukins, Craig D.; MacFarlan, Paul J.; Shutthanandan, Janani I.; Smith, Dennese M.

    2012-12-01

    One of the events postulated in the hazard analysis at the Waste Treatment and Immobilization Plant (WTP) and other U.S. Department of Energy (DOE) nuclear facilities is a breach in process piping that produces aerosols with droplet sizes in the respirable range. The current approach for predicting the size and concentration of aerosols produced in a spray leak involves extrapolating from correlations reported in the literature. These correlations are based on results obtained from small engineered spray nozzles using pure liquids with Newtonian fluid behavior. The narrow ranges of physical properties on which the correlations are based do not cover the wide range of slurries and viscous materials that will be processed in the WTP and across processing facilities in the DOE complex. Two key technical areas were identified where testing results were needed to improve the technical basis by reducing the uncertainty due to extrapolating existing literature results. The first technical need was to quantify the role of slurry particles in small breaches where the slurry particles may plug and result in substantially reduced, or even negligible, respirable fraction formed by high-pressure sprays. The second technical need was to determine the aerosol droplet size distribution and volume from prototypic breaches and fluids, specifically including sprays from larger breaches with slurries where data from the literature are scarce. To address these technical areas, small- and large-scale test stands were constructed and operated with simulants to determine aerosol release fractions and generation rates from a range of breach sizes and geometries. The properties of the simulants represented the range of properties expected in the WTP process streams and included water, sodium salt solutions, slurries containing boehmite or gibbsite, and a hazardous chemical simulant. The effect of anti-foam agents was assessed with most of the simulants. Orifices included round holes and rectangular slots. The round holes ranged in size from 0.2 to 4.46 mm. The slots ranged from (width × length) 0.3 × 5 to 2.74 × 76.2 mm. Most slots were oriented longitudinally along the pipe, but some were oriented circumferentially. In addition, a limited number of multi-hole test pieces were tested in an attempt to assess the impact of a more complex breach. Much of the testing was conducted at pressures of 200 and 380 psi, but some tests were conducted at 100 psi. Testing the largest postulated breaches was deemed impractical because of the large size of some of the WTP equipment. The purpose of this report is to present the experimental results and analyses for the aerosol measurements obtained in the large-scale test stand. The report includes a description of the simulants used and their properties, equipment and operations, data analysis methodology, and test results. The results of tests investigating the role of slurry particles in plugging of small breaches are reported in Mahoney et al. 2012a. The results of the aerosol measurements in the small-scale test stand are reported in Mahoney et al. (2012b).

  3. Infrastructure for large-scale tests in marine autonomy

    E-Print Network [OSTI]

    Hummel, Robert A. (Robert Andrew)

    2012-01-01

    This thesis focuses on the development of infrastructure for research with large-scale autonomous marine vehicle fleets and the design of sampling trajectories for compressive sensing (CS). The newly developed infrastructure ...

  4. Fourth International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms,

    E-Print Network [OSTI]

    for Offshore Wind Farms, 20-21 October 2003, Billund, Denmark C. S. Nielsen, Hans F. Ravn, Camilla Schaumburg1 Fourth International Workshop on Large-Scale Integration of Wind Power and Transmission Networks of Denmark, B. 321, DK-2800 Lyngby, Denmark, csm@imm.dtu.dk Two wind power prognosis criteria and regulating

  5. PROPERTIES IMPORTANT TO MIXING FOR WTP LARGE SCALE INTEGRATED TESTING

    SciTech Connect (OSTI)

    Koopman, D.; Martino, C.; Poirier, M.

    2012-04-26

    Large Scale Integrated Testing (LSIT) is being planned by Bechtel National, Inc. to address uncertainties in the full scale mixing performance of the Hanford Waste Treatment and Immobilization Plant (WTP). Testing will use simulated waste rather than actual Hanford waste. Therefore, the use of suitable simulants is critical to achieving the goals of the test program. External review boards have raised questions regarding the overall representativeness of simulants used in previous mixing tests. Accordingly, WTP requested the Savannah River National Laboratory (SRNL) to assist with development of simulants for use in LSIT. Among the first tasks assigned to SRNL was to develop a list of waste properties that matter to pulse-jet mixer (PJM) mixing of WTP tanks. This report satisfies Commitment 5.2.3.1 of the Department of Energy Implementation Plan for Defense Nuclear Facilities Safety Board Recommendation 2010-2: physical properties important to mixing and scaling. In support of waste simulant development, the following two objectives are the focus of this report: (1) Assess physical and chemical properties important to the testing and development of mixing scaling relationships; (2) Identify the governing properties and associated ranges for LSIT to achieve the Newtonian and non-Newtonian test objectives. This includes the properties to support testing of sampling and heel management systems. The test objectives for LSIT relate to transfer and pump out of solid particles, prototypic integrated operations, sparger operation, PJM controllability, vessel level/density measurement accuracy, sampling, heel management, PJM restart, design and safety margin, Computational Fluid Dynamics (CFD) Verification and Validation (V and V) and comparison, performance testing and scaling, and high temperature operation. The slurry properties that are most important to Performance Testing and Scaling depend on the test objective and rheological classification of the slurry (i.e., Newtonian or non-Newtonian). The most important properties for testing with Newtonian slurries are the Archimedes number distribution and the particle concentration. For some test objectives, the shear strength is important. In the testing to collect data for CFD V and V and CFD comparison, the liquid density and liquid viscosity are important. In the high temperature testing, the liquid density and liquid viscosity are important. The Archimedes number distribution combines effects of particle size distribution, solid-liquid density difference, and kinematic viscosity. The most important properties for testing with non-Newtonian slurries are the slurry yield stress, the slurry consistency, and the shear strength. The solid-liquid density difference and the particle size are also important. It is also important to match multiple properties within the same simulant to achieve behavior representative of the waste. Other properties such as particle shape, concentration, surface charge, and size distribution breadth, as well as slurry cohesiveness and adhesiveness, liquid pH and ionic strength also influence the simulant properties either directly or through other physical properties such as yield stress.

  6. Evidence of Early Enrichment of the Galactic Disk by Large-Scale Winds

    E-Print Network [OSTI]

    Tsujimoto, T; Freeman, K C

    2010-01-01

    Large-scale homogeneous surveys of Galactic stars may indicate that the elemental abundance gradient evolves with cosmic time, a phenomenon that was not foreseen in existing models of Galactic chemical evolution (GCE). If the phenomenon is confirmed in future studies, we show that this effect, at least in part, is due to large-scale winds that once enriched the disk. These set up the steep abundance gradient in the inner disk (R <14 kpc). At the close of the wind phase, chemical enrichment through accretion of metal-poor material from the halo onto the disk gradually reduced the metallicity of the inner region, whereas a slow increase in the metallicity proceeded beyond the solar circle. Our "wind+infall" model accounts for flattening of the abundance gradient in the inner disk, in good agreement with observations. Accordingly, we propose that enrichment by large-scale winds is a crucial factor for chemical evolution in the disk. We anticipate that rapid flattening of the abundance gradient is the hallmark...

  7. The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource over Europe and its Intermittency

    E-Print Network [OSTI]

    Kriesche, Pascal

    In times of increasing importance of wind power in the world’s energy mix, this study focuses on a better understanding of the influences of large-scale climate variability on wind power resource over Europe. The impact ...

  8. Generation of large-scale gravity waves and neutral winds in the thermosphere from the dissipation of convectively

    E-Print Network [OSTI]

    Vadas, Sharon

    Generation of large-scale gravity waves and neutral winds in the thermosphere from the dissipation: Vadas, S. L., and H. Liu (2009), Generation of large-scale gravity waves and neutral winds of convectively generated gravity waves Sharon L. Vadas1 and Han-li Liu2 Received 29 January 2009; accepted 11

  9. Mars as a comet: Solar wind interaction on a large scale

    E-Print Network [OSTI]

    Holmstrom, Mats

    2015-01-01

    Looking at the Mars-solar wind interaction on a larger spatial scale than the near Mars region, the planet can be seen as an ion source interacting with the solar wind, in many ways like a comet, but with a smaller ion source region. Here we study the interaction between Mars and the solar wind using a hybrid model (particle ions and fluid electrons). We find that the solar wind is disturbed by Mars out to 100 Mars radii downstream of the planet, and beyond. On this large scale it is clear that the escaping ions can be classified into two different populations. A polar plume of ions picked-up by the solar wind, and a more fluid outflow of ions behind the planet. The outflow increases linear with the production up to levels of observed outflow rates, then the escape levels off for higher production rates.

  10. Large Scale Test of Sensor Fingerprint Camera Identification Miroslav Goljan, Jessica Fridrich, and Toms Filler

    E-Print Network [OSTI]

    Fridrich, Jessica

    Large Scale Test of Sensor Fingerprint Camera Identification Miroslav Goljan, Jessica Fridrich This paper presents a large scale test of camera identification from sensor fingerprints. To overcome-line image sharing site. In our experiment, we tested over one million images spanning 6896 individual

  11. Large scale risk-assessment of wind-farms on population viability of a globally endangered long-lived raptor

    E-Print Network [OSTI]

    Carrete, Martina

    Large scale risk-assessment of wind-farms on population viability of a globally endangered long percnopterus Wind-farm Long-lived species Population viability analysis a b s t r a c t Wind-farms receive, they can have adverse effects on wildlife, particularly through collision with turbines. Research on wind-farm

  12. Relative effects of wind stress curl, topography, and stratification on large-scale circulation in Lake Michigan

    E-Print Network [OSTI]

    Relative effects of wind stress curl, topography, and stratification on large-scale circulation, and stratification on large-scale circulation. The multiseason simulations provide a period long enough to encompass the full range of atmospheric and thermal conditions that can occur in the lake. The purpose of this paper

  13. Goethite Bench-scale and Large-scale Preparation Tests

    SciTech Connect (OSTI)

    Josephson, Gary B.; Westsik, Joseph H.

    2011-10-23

    The Hanford Waste Treatment and Immobilization Plant (WTP) is the keystone for cleanup of high-level radioactive waste from our nation's nuclear defense program. The WTP will process high-level waste from the Hanford tanks and produce immobilized high-level waste glass for disposal at a national repository, low activity waste (LAW) glass, and liquid effluent from the vitrification off-gas scrubbers. The liquid effluent will be stabilized into a secondary waste form (e.g. grout-like material) and disposed on the Hanford site in the Integrated Disposal Facility (IDF) along with the low-activity waste glass. The major long-term environmental impact at Hanford results from technetium that volatilizes from the WTP melters and finally resides in the secondary waste. Laboratory studies have indicated that pertechnetate ({sup 99}TcO{sub 4}{sup -}) can be reduced and captured into a solid solution of {alpha}-FeOOH, goethite (Um 2010). Goethite is a stable mineral and can significantly retard the release of technetium to the environment from the IDF. The laboratory studies were conducted using reaction times of many days, which is typical of environmental subsurface reactions that were the genesis of this new process. This study was the first step in considering adaptation of the slow laboratory steps to a larger-scale and faster process that could be conducted either within the WTP or within the effluent treatment facility (ETF). Two levels of scale-up tests were conducted (25x and 400x). The largest scale-up produced slurries of Fe-rich precipitates that contained rhenium as a nonradioactive surrogate for {sup 99}Tc. The slurries were used in melter tests at Vitreous State Laboratory (VSL) to determine whether captured rhenium was less volatile in the vitrification process than rhenium in an unmodified feed. A critical step in the technetium immobilization process is to chemically reduce Tc(VII) in the pertechnetate (TcO{sub 4}{sup -}) to Tc(Iv)by reaction with the ferrous ion, Fe{sup 2+}-Fe{sup 2+} is oxidized to Fe{sup 3+} - in the presence of goethite seed particles. Rhenium does not mimic that process; it is not a strong enough reducing agent to duplicate the TcO{sub 4}{sup -}/Fe{sup 2+} redox reactions. Laboratory tests conducted in parallel with these scaled tests identified modifications to the liquid chemistry necessary to reduce ReO{sub 4}{sup -} and capture rhenium in the solids at levels similar to those achieved by Um (2010) for inclusion of Tc into goethite. By implementing these changes, Re was incorporated into Fe-rich solids for testing at VSL. The changes also changed the phase of iron that was in the slurry product: rather than forming goethite ({alpha}-FeOOH), the process produced magnetite (Fe{sub 3}O{sub 4}). Magnetite was considered by Pacific Northwest National Laboratory (PNNL) and VSL to probably be a better product to improve Re retention in the melter because it decomposes at a higher temperature than goethite (1538 C vs. 136 C). The feasibility tests at VSL were conducted using Re-rich magnetite. The tests did not indicate an improved retention of Re in the glass during vitrification, but they did indicate an improved melting rate (+60%), which could have significant impact on HLW processing. It is still to be shown whether the Re is a solid solution in the magnetite as {sup 99}Tc was determined to be in goethite.

  14. Large-Scale Software Unit Testing on the Grid Yaohang Li, 2

    E-Print Network [OSTI]

    Li, Yaohang

    Large-Scale Software Unit Testing on the Grid 1 Yaohang Li, 2 Tao Dong, 3 Xinyu Zhang, 4 Yongduan-scale and cost-efficient computational grid resources as a software testing test bed to support automated software unit test in a complicated system. Within this test framework, a dynamic bag-of-tasks model

  15. ARRA-Multi-Level Energy Storage and Controls for Large-Scale Wind Energy Integration

    SciTech Connect (OSTI)

    David Wenzhong Gao

    2012-09-30

    The Project Objective is to design innovative energy storage architecture and associated controls for high wind penetration to increase reliability and market acceptance of wind power. The project goals are to facilitate wind energy integration at different levels by design and control of suitable energy storage systems. The three levels of wind power system are: Balancing Control Center level, Wind Power Plant level, and Wind Power Generator level. Our scopes are to smooth the wind power fluctuation and also ensure adequate battery life. In the new hybrid energy storage system (HESS) design for wind power generation application, the boundary levels of the state of charge of the battery and that of the supercapacitor are used in the control strategy. In the controller, some logic gates are also used to control the operating time durations of the battery. The sizing method is based on the average fluctuation of wind profiles of a specific wind station. The calculated battery size is dependent on the size of the supercapacitor, state of charge of the supercapacitor and battery wear. To accommodate the wind power fluctuation, a hybrid energy storage system (HESS) consisting of battery energy system (BESS) and super-capacitor is adopted in this project. A probability-based power capacity specification approach for the BESS and super-capacitors is proposed. Through this method the capacities of BESS and super-capacitor are properly designed to combine the characteristics of high energy density of BESS and the characteristics of high power density of super-capacitor. It turns out that the super-capacitor within HESS deals with the high power fluctuations, which contributes to the extension of BESS lifetime, and the super-capacitor can handle the peaks in wind power fluctuations without the severe penalty of round trip losses associated with a BESS. The proposed approach has been verified based on the real wind data from an existing wind power plant in Iowa. An intelligent controller that increases battery life within hybrid energy storage systems for wind application was developed. Comprehensive studies have been conducted and simulation results are analyzed. A permanent magnet synchronous generator, coupled with a variable speed wind turbine, is connected to a power grid (14-bus system). A rectifier, a DC-DC converter and an inverter are used to provide a complete model of the wind system. An Energy Storage System (ESS) is connected to a DC-link through a DC-DC converter. An intelligent controller is applied to the DC-DC converter to help the Voltage Source Inverter (VSI) to regulate output power and also to control the operation of the battery and supercapacitor. This ensures a longer life time for the batteries. The detailed model is simulated in PSCAD/EMTP. Additionally, economic analysis has been done for different methods that can reduce the wind power output fluctuation. These methods are, wind power curtailment, dumping loads, battery energy storage system and hybrid energy storage system. From the results, application of single advanced HESS can save more money for wind turbines owners. Generally the income would be the same for most of methods because the wind does not change and maximum power point tracking can be applied to most systems. On the other hand, the cost is the key point. For short term and small wind turbine, the BESS is the cheapest and applicable method while for large scale wind turbines and wind farms the application of advanced HESS would be the best method to reduce the power fluctuation. The key outcomes of this project include a new intelligent controller that can reduce energy exchanged between the battery and DC-link, reduce charging/discharging cycles, reduce depth of discharge and increase time interval between charge/discharge, and lower battery temperature. This improves the overall lifetime of battery energy storages. Additionally, a new design method based on probability help optimize the power capacity specification for BESS and super-capacitors. Recommendations include experimental imp

  16. Self-consistency tests of large-scale dynamics parameterizations for single-column modeling

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

    Edman, Jacob P.; Romps, David M.

    2015-03-18

    Large-scale dynamics parameterizations are tested numerically in cloud-resolving simulations, including a new version of the weak-pressure-gradient approximation (WPG) introduced by Edman and Romps (2014), the weak-temperature-gradient approximation (WTG), and a prior implementation of WPG. We perform a series of self-consistency tests with each large-scale dynamics parameterization, in which we compare the result of a cloud-resolving simulation coupled to WTG or WPG with an otherwise identical simulation with prescribed large-scale convergence. In self-consistency tests based on radiative-convective equilibrium (RCE; i.e., no large-scale convergence), we find that simulations either weakly coupled or strongly coupled to either WPG or WTG are self-consistent, butmore »WPG-coupled simulations exhibit a nonmonotonic behavior as the strength of the coupling to WPG is varied. We also perform self-consistency tests based on observed forcings from two observational campaigns: the Tropical Warm Pool International Cloud Experiment (TWP-ICE) and the ARM Southern Great Plains (SGP) Summer 1995 IOP. In these tests, we show that the new version of WPG improves upon prior versions of WPG by eliminating a potentially troublesome gravity-wave resonance.« less

  17. Techno-economic Modeling of the Integration of 20% Wind and Large-scale Energy Storage in ERCOT by 2030

    SciTech Connect (OSTI)

    Ross Baldick; Michael Webber; Carey King; Jared Garrison; Stuart Cohen; Duehee Lee

    2012-12-21

    This study�¢����s objective is to examine interrelated technical and economic avenues for the Electric Reliability Council of Texas (ERCOT) grid to incorporate up to and over 20% wind generation by 2030. Our specific interests are to look at the factors that will affect the implementation of both high level of wind power penetration (> 20% generation) and installation of large scale storage.

  18. Small Solar Wind Transients and Their Connection to the Large-Scale Coronal Structure

    E-Print Network [OSTI]

    2009-01-01

    AT SOLAR MINIMUM Small Solar Wind Transients and Theirinclude closed loops, Small Solar Wind Transients and Theirthe transient on Small Solar Wind Transients and Their

  19. Small Solar Wind Transients and Their Connection to the Large-Scale Coronal Structure

    E-Print Network [OSTI]

    2009-01-01

    I.G. : 2006, In situ solar wind and magnetic ?eld signaturesE. : 2008, The IMPACT Solar Wind Electron Analyzer (SWEA).Heliospheric images of the solar wind at Earth. Astrophys.

  20. Nonlinear Seismic Correlation Analysis of the JNES/NUPEC Large-Scale Piping System Tests.

    SciTech Connect (OSTI)

    Nie,J.; DeGrassi, G.; Hofmayer, C.; Ali, S.

    2008-06-01

    The Japan Nuclear Energy Safety Organization/Nuclear Power Engineering Corporation (JNES/NUPEC) large-scale piping test program has provided valuable new test data on high level seismic elasto-plastic behavior and failure modes for typical nuclear power plant piping systems. The component and piping system tests demonstrated the strain ratcheting behavior that is expected to occur when a pressurized pipe is subjected to cyclic seismic loading. Under a collaboration agreement between the US and Japan on seismic issues, the US Nuclear Regulatory Commission (NRC)/Brookhaven National Laboratory (BNL) performed a correlation analysis of the large-scale piping system tests using derailed state-of-the-art nonlinear finite element models. Techniques are introduced to develop material models that can closely match the test data. The shaking table motions are examined. The analytical results are assessed in terms of the overall system responses and the strain ratcheting behavior at an elbow. The paper concludes with the insights about the accuracy of the analytical methods for use in performance assessments of highly nonlinear piping systems under large seismic motions.

  1. Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile

    E-Print Network [OSTI]

    Rahn, David A.

    2012-10-16

    Along the central coast of Chile is typically equatorward, upwelling-favorable wind associated with the southeast Pacific anticyclone. A coastal low-level jet often develops, and its wind speed is mostly controlled by the meridional pressure...

  2. Large-Scale Offshore Wind Power in the United States: Executive Summary

    SciTech Connect (OSTI)

    Musial, W.; Ram, B.

    2010-09-01

    This document provides a summary of a 236-page NREL report that provides a broad understanding of today's offshore wind industry, the offshore wind resource, and the associated technology challenges, economics, permitting procedures, and potential risks and benefits.

  3. Aerodynamic force measurement on a large-scale model in a short duration test facility

    SciTech Connect (OSTI)

    Tanno, H.; Kodera, M.; Komuro, T.; Sato, K.; Takahasi, M.; Itoh, K.

    2005-03-01

    A force measurement technique has been developed for large-scale aerodynamic models with a short test time. The technique is based on direct acceleration measurements, with miniature accelerometers mounted on a test model suspended by wires. Measuring acceleration at two different locations, the technique can eliminate oscillations from natural vibration of the model. The technique was used for drag force measurements on a 3 m long supersonic combustor model in the HIEST free-piston driven shock tunnel. A time resolution of 350 {mu}s is guaranteed during measurements, whose resolution is enough for ms order test time in HIEST. To evaluate measurement reliability and accuracy, measured values were compared with results from a three-dimensional Navier-Stokes numerical simulation. The difference between measured values and numerical simulation values was less than 5%. We conclude that this measurement technique is sufficiently reliable for measuring aerodynamic force within test durations of 1 ms.

  4. Large-Scale Offshore Wind Power in the United States: Assessment of Opportunities and Barriers

    SciTech Connect (OSTI)

    Musial, W.; Ram, B.

    2010-09-01

    This paper assesses the potential for U.S. offshore wind to meet the energy needs of many coastal and Great Lakes states.

  5. Large scale steam valve test: Performance testing of large butterfly valves and full scale high flowrate steam testing

    SciTech Connect (OSTI)

    Meadows, J.B.; Robbins, G.E.; Roselius, D.G. [and others

    1995-05-01

    This report presents the results of the design testing of large (36-inch diameter) butterfly valves under high flow conditions. The two butterfly valves were pneumatically operated air-open, air-shut valves (termed valves 1 and 2). These butterfly valves were redesigned to improve their ability to function under high flow conditions. Concern was raised regarding the ability of the butterfly valves to function as required with high flow-induced torque imposed on the valve discs during high steam flow conditions. High flow testing was required to address the flow-induced torque concerns. The valve testing was done using a heavily instrumented piping system. This test program was called the Large Scale Steam Valve Test (LSSVT). The LSSVT program demonstrated that the redesigned valves operated satisfactorily under high flow conditions.

  6. Test of the CLAS12 RICH large scale prototype in the direct proximity focusing configuration

    E-Print Network [OSTI]

    N. Baltzell; L. Barion; F. Benmokhtar; W. Brooks; E. Cisbani; M. Contalbrigo; A. El Alaoui; K. Hafidi; M. Hoek; V. Kubarovsky; L. Lagamba; V. Lucherini; R. Malaguti; M. Mirazita; R. A. Montgomery; A. Movsisyan; P. Musico; A. Orlandi; D. Orecchini; L. L. Pappalardo; R. Perrino; J. Phillips; S. Pisano; P. Rossi; S. Squerzanti; S. Tomassini; M. Turisini; A. Viticchie

    2015-09-09

    A large area ring-imaging Cherenkov detector has been designed to provide clean hadron identification capability in the momentum range from 3 GeV/c up to 8 GeV/c for the CLAS12 experiments at the upgraded 12 GeV continuous electron beam accelerator facility of Jefferson Laboratory. The adopted solution foresees a novel hybrid optics design based on aerogel radiator, composite mirrors and high-packed and high-segmented photon detectors. Cherenkov light will either be imaged directly (forward tracks) or after two mirror reflections (large angle tracks). We report here the results of the tests of a large scale prototype of the RICH detector performed with the hadron beam of the CERN T9 experimental hall for the direct detection configuration. The tests demonstrated that the proposed design provides the required pion-to-kaon rejection factor of 1:500 in the whole momentum range.

  7. Test of the CLAS12 RICH large scale prototype in the direct proximity focusing configuration

    E-Print Network [OSTI]

    Baltzell, N; Benmokhtar, F; Brooks, W; Cisbani, E; Contalbrigo, M; Alaoui, A El; Hafidi, K; Hoek, M; Kubarovsky, V; Lagamba, L; Lucherini, V; Malaguti, R; Mirazita, M; Montgomery, R A; Movsisyan, A; Musico, P; Orlandi, A; Orecchini, D; Pappalardo, L L; Perrino, R; Phillips, J; Pisano, S; Rossi, P; Squerzanti, S; Tomassini, S; Turisini, M; Viticchie, A

    2015-01-01

    A large area ring-imaging Cherenkov detector has been designed to provide clean hadron identification capability in the momentum range from 3 GeV/c up to 8 GeV/c for the CLAS12 experiments at the upgraded 12 GeV continuous electron beam accelerator facility of Jefferson Laboratory. The adopted solution foresees a novel hybrid optics design based on aerogel radiator, composite mirrors and high-packed and high-segmented photon detectors. Cherenkov light will either be imaged directly (forward tracks) or after two mirror reflections (large angle tracks). We report here the results of the tests of a large scale prototype of the RICH detector performed with the hadron beam of the CERN T9 experimental hall for the direct detection configuration. The tests demonstrated that the proposed design provides the required pion-to-kaon rejection factor of 1:500 in the whole momentum range.

  8. The role of hydroelectric generation in electric power systems with large scale wind generation

    E-Print Network [OSTI]

    Hagerty, John Michael

    2012-01-01

    An increasing awareness of the operational challenges created by intermittent generation of electricity from policy-mandated renewable resources, such as wind and solar, has led to increased scrutiny of the public policies ...

  9. Potential Climatic Impacts and Reliability of Large-Scale Offshore Wind Farms

    E-Print Network [OSTI]

    Wang, Chien

    The vast availability of wind power has fueled substantial interest in this renewable energy source as a potential near-zero greenhouse gas emission technology for meeting future world energy needs while addressing the ...

  10. Large-Scale Wind Integration Studies in the United States: Preliminary Results; Preprint

    SciTech Connect (OSTI)

    Milligan, M.; Lew, D.; Corbus, D.; Piwko, R.; Miller, N.; Clark, K.; Jordan, G.; Freeman, L.; Zavadil, B.; Schuerger, M.

    2009-09-01

    The National Renewable Energy Laboratory is managing two large regional wind integration studies on behalf of the United States Department of Energy. These two studies are believed to be the largest ever undertaken in the United States.

  11. Aerosols released during large-scale integral MCCI tests in the ACE Program

    SciTech Connect (OSTI)

    Fink, J.K.; Thompson, D.H.; Spencer, B.W.; Sehgal, B.R.

    1992-04-01

    As part of the internationally sponsored Advanced Containment Experiments (ACE) program, seven large-scale experiments on molten core concrete interactions (MCCIs) have been performed at Argonne National Laboratory. One of the objectives of these experiments is to collect and characterize all the aerosols released from the MCCIs. Aerosols released from experiments using four types of concrete (siliceous, limestone/common sand, serpentine, and limestone/limestone) and a range of metal oxidation for both BWR and PWR reactor core material have been collected and characterized. Release fractions were determined for UO{sup 2}, Zr, the fission-products: BaO, SrO, La{sub 2}O{sub 3}, CeO{sub 2}, MoO{sub 2}, Te, Ru, and control materials: Ag, In, and B{sub 4}C. Release fractions of UO{sub 2} and the fission products other than Te were small in all tests. However, release of control materials was significant.

  12. Aerosols released during large-scale integral MCCI tests in the ACE Program

    SciTech Connect (OSTI)

    Fink, J.K.; Thompson, D.H.; Spencer, B.W. ); Sehgal, B.R. )

    1992-01-01

    As part of the internationally sponsored Advanced Containment Experiments (ACE) program, seven large-scale experiments on molten core concrete interactions (MCCIs) have been performed at Argonne National Laboratory. One of the objectives of these experiments is to collect and characterize all the aerosols released from the MCCIs. Aerosols released from experiments using four types of concrete (siliceous, limestone/common sand, serpentine, and limestone/limestone) and a range of metal oxidation for both BWR and PWR reactor core material have been collected and characterized. Release fractions were determined for UO{sup 2}, Zr, the fission-products: BaO, SrO, La{sub 2}O{sub 3}, CeO{sub 2}, MoO{sub 2}, Te, Ru, and control materials: Ag, In, and B{sub 4}C. Release fractions of UO{sub 2} and the fission products other than Te were small in all tests. However, release of control materials was significant.

  13. Impacts of Large-Scale Wind Generators Penetration on the Voltage Stability of Power Systems

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    on the operation of existing transmission network . The European Wind Energy Association (EWEA) projects 230 GW closer to their limits, using flexible AC transmission system devices (FACTS), and also due- rently interconnected into the existing transmission network of 220kV voltage level with higher installed

  14. Large Scale Wind Turbine Siting Map Report NJ Department of Environmental Protection

    E-Print Network [OSTI]

    Holberton, Rebecca L.

    , 2009 #12;Introduction This report documents the methodology and justification used to develop the New energy facilities located on land shall be sited such that no portion of the wind turbine(s), including and the Delaware Bayshore) were also identified on the Map. Along the Atlantic Coast corridor the rate of migrant

  15. Large-Scale Pumping Test Recommendations for the 200-ZP-1 Operable Unit

    SciTech Connect (OSTI)

    Spane, Frank A.

    2010-09-08

    CH2M Hill Plateau Remediation Company (CHPRC) is currently assessing aquifer characterization needs to optimize pump-and-treat remedial strategies (e.g., extraction well pumping rates, pumping schedule/design) in the 200-ZP-1 operable unit (OU), and in particular for the immediate area of the 241 TX-TY Tank Farm. Specifically, CHPRC is focusing on hydrologic characterization opportunities that may be available for newly constructed and planned ZP-1 extraction wells. These new extraction wells will be used to further refine the 3-dimensional subsurface contaminant distribution within this area and will be used in concert with other existing pump-and-treat wells to remediate the existing carbon tetrachloride contaminant plume. Currently, 14 extraction wells are actively used in the Interim Record of Decision ZP-1 pump-and-treat system for the purpose of remediating the existing carbon tetrachloride contamination in groundwater within this general area. As many as 20 new extraction wells and 17 injection wells may be installed to support final pump-and-treat operations within the OU area. It should be noted that although the report specifically refers to the 200-ZP-1 OU, the large-scale test recommendations are also applicable to the adjacent 200-UP-1 OU area. This is because of the similar hydrogeologic conditions exhibited within these two adjoining OU locations.

  16. Development of explosive event scale model testing capability at Sandia`s large scale centrifuge facility

    SciTech Connect (OSTI)

    Blanchat, T.K.; Davie, N.T.; Calderone, J.J.

    1998-02-01

    Geotechnical structures such as underground bunkers, tunnels, and building foundations are subjected to stress fields produced by the gravity load on the structure and/or any overlying strata. These stress fields may be reproduced on a scaled model of the structure by proportionally increasing the gravity field through the use of a centrifuge. This technology can then be used to assess the vulnerability of various geotechnical structures to explosive loading. Applications of this technology include assessing the effectiveness of earth penetrating weapons, evaluating the vulnerability of various structures, counter-terrorism, and model validation. This document describes the development of expertise in scale model explosive testing on geotechnical structures using Sandia`s large scale centrifuge facility. This study focused on buried structures such as hardened storage bunkers or tunnels. Data from this study was used to evaluate the predictive capabilities of existing hydrocodes and structural dynamics codes developed at Sandia National Laboratories (such as Pronto/SPH, Pronto/CTH, and ALEGRA). 7 refs., 50 figs., 8 tabs.

  17. 1. Large Scale Climate Simulator (Building 3144) The LSCS tests roof and/or attic assemblies weighing up to

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Envelope 1. Large Scale Climate Simulator (Building 3144) The LSCS tests roof and/or attic accommodates specimens of up to 606020 cm 24248 in.). 5. Roof Thermal Research Apparatus (Apparatus 3138) #12;RTRA measures effects of long-term natural weather exposure on small, low-slope roof specimens

  18. Coupled Dynamic Analysis of Large-Scale Mono-Column Offshore Wind Turbine with a Single Tether Hinged in Seabed 

    E-Print Network [OSTI]

    Chen, Jieyan

    2012-10-19

    The increased interest in the offshore wind resource in both industry and academic and the extension of the wind field where offshore wind turbine can be deployed has stimulated quite a number of offshore wind turbines concepts. This thesis presents...

  19. Large Scale Triaxial Testing of Mechanically Stabilized Earth Retaining Wall Backfill 

    E-Print Network [OSTI]

    Garton, Mackenzie

    2013-01-11

    of both strength and volumetric test data to define soil behavior parameters which include the following: modulus number (K), modulus exponent (n), initial tangent modulus (Ei), failure ratio (Rf ), initial Poisson’s Ratio (?i), and Poisson’s Ratio...

  20. Testing theoretical game theory results on a large scale : prisoner's dilemma on Facebook

    E-Print Network [OSTI]

    Long, Sunny (Sunny X.)

    2013-01-01

    In my research, I designed and implemented an online game accessable to a large diverse audience via the Facebook social network to test out game theoretic results and study social interactions. In this game, we designed ...

  1. ANEMOS: Development of a Next Generation Wind Power Forecasting System for the Large-Scale Integration of Onshore &

    E-Print Network [OSTI]

    Heinemann, Detlev

    -Scale Integration of Onshore & Offshore Wind Farms. G. Kariniotakis* , D. Mayer, J. Moussafir, R. Chevallaz-line operation at onshore and offshore wind farms for prediction at a local, regional and national scale, for onshore and offshore wind power forecasting, exploiting both statistical and physical modeling approaches

  2. Active and passive acoustic imaging inside a large-scale polyaxial hydraulic fracture test

    SciTech Connect (OSTI)

    Glaser, S.D.; Dudley, J.W. II; Shlyapobersky, J.

    1999-07-01

    An automated laboratory hydraulic fracture experiment has been assembled to determine what rock and treatment parameters are crucial to improving the efficiency and effectiveness of field hydraulic fractures. To this end a large (460 mm cubic sample) polyaxial cell, with servo-controlled X,Y,Z, pore pressure, crack-mouth-opening-displacement, and bottom hole pressure, was built. Active imaging with embedded seismic diffraction arrays images the geometry of the fracture. Preliminary tests indicate fracture extent can be imaged to within 5%. Unique embeddible high-fidelity particle velocity AE sensors were designed and calibrated to allow determination of fracture source kinematics.

  3. Impact of Distribution-Connected Large-Scale Wind Turbines on Transmission System Stability during Large Disturbances: Preprint

    SciTech Connect (OSTI)

    Zhang, Y.; Allen, A.; Hodge, B. M.

    2014-02-01

    This work examines the dynamic impacts of distributed utility-scale wind power during contingency events on both the distribution system and the transmission system. It is the first step toward investigating high penetrations of distribution-connected wind power's impact on both distribution and transmission stability.

  4. Abstract--As a common tendency, large-scale wind farms are increasingly connected to the transmission system of modern

    E-Print Network [OSTI]

    Chen, Zhe

    include [1, 2]: · Under normal conditions: Frequency and voltage ranges Active power regulation and frequency control Reactive power regulation and voltage control · Under disturbance conditions: Voltage ride regulation. For variable-speed wind turbines which are connected to the power system through power electronic

  5. Large-Scale Offshore Wind Power in the United States: Assessment of Opportunities and Barriers, NREL (National Renewable Energy Laboratory)

    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 mastheadLakeLanguage Offshore Wind Power

  6. Large-Scale Uncertainty and Error Analysis for Time-dependent Fluid/Structure Interactions in Wind Turbine Applications

    SciTech Connect (OSTI)

    Alonso, Juan J. [Stanford University; Iaccarino, Gianluca [Stanford University

    2013-08-25

    The following is the final report covering the entire period of this aforementioned grant, June 1, 2011 - May 31, 2013 for the portion of the effort corresponding to Stanford University (SU). SU has partnered with Sandia National Laboratories (PI: Mike S. Eldred) and Purdue University (PI: Dongbin Xiu) to complete this research project and this final report includes those contributions made by the members of the team at Stanford. Dr. Eldred is continuing his contributions to this project under a no-cost extension and his contributions to the overall effort will be detailed at a later time (once his effort has concluded) on a separate project submitted by Sandia National Laboratories. At Stanford, the team is made up of Profs. Alonso, Iaccarino, and Duraisamy, post-doctoral researcher Vinod Lakshminarayan, and graduate student Santiago Padron. At Sandia National Laboratories, the team includes Michael Eldred, Matt Barone, John Jakeman, and Stefan Domino, and at Purdue University, we have Prof. Dongbin Xiu as our main collaborator. The overall objective of this project was to develop a novel, comprehensive methodology for uncertainty quantification by combining stochastic expansions (nonintrusive polynomial chaos and stochastic collocation), the adjoint approach, and fusion with experimental data to account for aleatory and epistemic uncertainties from random variable, random field, and model form sources. The expected outcomes of this activity were detailed in the proposal and are repeated here to set the stage for the results that we have generated during the time period of execution of this project: 1. The rigorous determination of an error budget comprising numerical errors in physical space and statistical errors in stochastic space and its use for optimal allocation of resources; 2. A considerable increase in efficiency when performing uncertainty quantification with a large number of uncertain variables in complex non-linear multi-physics problems; 3. A solution to the long-time integration problem of spectral chaos approaches; 4. A rigorous methodology to account for aleatory and epistemic uncertainties, to emphasize the most important variables via dimension reduction and dimension-adaptive refinement, and to support fusion with experimental data using Bayesian inference; 5. The application of novel methodologies to time-dependent reliability studies in wind turbine applications including a number of efforts relating to the uncertainty quantification in vertical-axis wind turbine applications. In this report, we summarize all accomplishments in the project (during the time period specified) focusing on advances in UQ algorithms and deployment efforts to the wind turbine application area. Detailed publications in each of these areas have also been completed and are available from the respective conference proceedings and journals as detailed in a later section.

  7. South Carolina gearing up for wind boom

    Broader source: Energy.gov [DOE]

    Clemson University’s Restoration Institute will soon begin constructing a large-scale wind turbine testing facility.

  8. Running Large Scale Jobs

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

    try on their large scale applications on Hopper for better performance. Try different compilers and compiler options The available compilers on Hopper are PGI, Cray, Intel, GNU,...

  9. Large-scale environments of binary AGB stars probed by Herschel. II: Two companions interacting with the wind of pi1 Gruis

    E-Print Network [OSTI]

    Mayer, A; Paladini, C; Kerschbaum, F; Pourbaix, D; Siopis, C; Ottensamer, R; Me?ina, M; Cox, N L J; Groenewegen, M A T; Klotz, D; Sadowski, G; Spang, A; Cruzalèbes, P; Waelkens, C

    2014-01-01

    Context. The Mass loss of Evolved StarS (MESS) sample observed with PACS on board the Herschel Space Observatory revealed that several asymptotic giant branch (AGB) stars are surrounded by an asymmetric circumstellar envelope (CSE) whose morphology is most likely caused by the interaction with a stellar companion. The evolution of AGB stars in binary systems plays a crucial role in understanding the formation of asymmetries in planetary nebul{\\ae} (PNe), but at present, only a handful of cases are known where the interaction of a companion with the stellar AGB wind is observed. Aims. We probe the environment of the very evolved AGB star $\\pi^1$ Gruis on large and small scales to identify the triggers of the observed asymmetries. Methods. Observations made with Herschel/PACS at 70 $\\mu$m and 160 $\\mu$m picture the large-scale environment of $\\pi^1$ Gru. The close surroundings of the star are probed by interferometric observations from the VLTI/AMBER archive. An analysis of the proper motion data of Hipparcos a...

  10. Proceedings of the Joint IAEA/CSNI Specialists` Meeting on Fracture Mechanics Verification by Large-Scale Testing held at Pollard Auditorium, Oak Ridge, Tennessee

    SciTech Connect (OSTI)

    Pugh, C.E.; Bass, B.R.; Keeney, J.A.

    1993-10-01

    This report contains 40 papers that were presented at the Joint IAEA/CSNI Specialists` Meeting Fracture Mechanics Verification by Large-Scale Testing held at the Pollard Auditorium, Oak Ridge, Tennessee, during the week of October 26--29, 1992. The papers are printed in the order of their presentation in each session and describe recent large-scale fracture (brittle and/or ductile) experiments, analyses of these experiments, and comparisons between predictions and experimental results. The goal of the meeting was to allow international experts to examine the fracture behavior of various materials and structures under conditions relevant to nuclear reactor components and operating environments. The emphasis was on the ability of various fracture models and analysis methods to predict the wide range of experimental data now available. The individual papers have been cataloged separately.

  11. Data Analysis, Pre-Ignition Assessment, and Post-Ignition Modeling of the Large-Scale Annular Cookoff Tests

    SciTech Connect (OSTI)

    G. Terrones; F.J. Souto; R.F. Shea; M.W.Burkett; E.S. Idar

    2005-09-30

    In order to understand the implications that cookoff of plastic-bonded explosive-9501 could have on safety assessments, we analyzed the available data from the large-scale annular cookoff (LSAC) assembly series of experiments. In addition, we examined recent data regarding hypotheses about pre-ignition that may be relevant to post-ignition behavior. Based on the post-ignition data from Shot 6, which had the most complete set of data, we developed an approximate equation of state (EOS) for the gaseous products of deflagration. Implementation of this EOS into the multimaterial hydrodynamics computer program PAGOSA yielded good agreement with the inner-liner collapse sequence for Shot 6 and with other data, such as velocity interferometer system for any reflector and resistance wires. A metric to establish the degree of symmetry based on the concept of time of arrival to pin locations was used to compare numerical simulations with experimental data. Several simulations were performed to elucidate the mode of ignition in the LSAC and to determine the possible compression levels that the metal assembly could have been subjected to during post-ignition.

  12. Large-scale Structural Fire Testing - How did we get here, Where are we, and Where are we going? 

    E-Print Network [OSTI]

    Gales, John; Maluk, Cristian; Bisby, Luke

    2012-07-22

    Structural fire testing is experiencing a renaissance. Both the research and regulatory communities are currently confronting the inherent problems associated with using simplified, single element tests on isolated structural ...

  13. Hydraulic characterization of aquifers by thermal response testing: Validation by large-scale tank and field experiments

    E-Print Network [OSTI]

    Cirpka, Olaf Arie

    (TRTs) are a common field method in shallow geothermics to estimate thermal properties of the ground. During the test, a constantly heated fluid is circulated in closed tubes within a vertical borehole heat is mainly studied in the con- text of geothermal energy use of shallow aquifers [Parr et al., 1983; Palmer

  14. Results of Large-Scale Testing on Effects of Anti-Foam Agent on Gas Retention and Release

    SciTech Connect (OSTI)

    Stewart, Charles W.; Guzman-Leong, Consuelo E.; Arm, Stuart T.; Butcher, Mark G.; Golovich, Elizabeth C.; Jagoda, Lynette K.; Park, Walter R.; Slaugh, Ryan W.; Su, Yin-Fong; Wend, Christopher F.; Mahoney, Lenna A.; Alzheimer, James M.; Bailey, Jeffrey A.; Cooley, Scott K.; Hurley, David E.; Johnson, Christian D.; Reid, Larry D.; Smith, Harry D.; Wells, Beric E.; Yokuda, Satoru T.

    2008-01-03

    The U.S. Department of Energy (DOE) Office of River Protection’s Waste Treatment Plant (WTP) will process and treat radioactive waste that is stored in tanks at the Hanford Site. The waste treatment process in the pretreatment facility will mix both Newtonian and non-Newtonian slurries in large process tanks. Process vessels mixing non-Newtonian slurries will use pulse jet mixers (PJMs), air sparging, and recirculation pumps. An anti-foam agent (AFA) will be added to the process streams to prevent surface foaming, but may also increase gas holdup and retention within the slurry. The work described in this report addresses gas retention and release in simulants with AFA through testing and analytical studies. Gas holdup and release tests were conducted in a 1/4-scale replica of the lag storage vessel operated in the Pacific Northwest National Laboratory (PNNL) Applied Process Engineering Laboratory using a kaolin/bentonite clay and AZ-101 HLW chemical simulant with non-Newtonian rheological properties representative of actual waste slurries. Additional tests were performed in a small-scale mixing vessel in the PNNL Physical Sciences Building using liquids and slurries representing major components of typical WTP waste streams. Analytical studies were directed at discovering how the effect of AFA might depend on gas composition and predicting the effect of AFA on gas retention and release in the full-scale plant, including the effects of mass transfer to the sparge air. The work at PNNL was part of a larger program that included tests conducted at Savannah River National Laboratory (SRNL) that is being reported separately. SRNL conducted gas holdup tests in a small-scale mixing vessel using the AZ-101 high-level waste (HLW) chemical simulant to investigate the effects of different AFAs, their components, and of adding noble metals. Full-scale, single-sparger mass transfer tests were also conducted at SRNL in water and AZ-101 HLW simulant to provide data for PNNL’s WTP gas retention and release modeling.

  15. learn invent impact Design of Large Scale

    E-Print Network [OSTI]

    McCalley, James D.

    learn invent impact Design of Large Scale Permanent Magnet Synchronous Generators for Wind Turbines.iastate.edu Permanent Magnet Synchronous Generators (PMSGs) Source: http://www.digikey.com/en-US/articles/techzone/2012of% 20PM_Generator_RPI_Qu_v8.pdf Permanent Magnet Synchronous Generators Rotor PMDD Generator Full

  16. Large scale tracking algorithms.

    SciTech Connect (OSTI)

    Hansen, Ross L.; Love, Joshua Alan; Melgaard, David Kennett; Karelitz, David B.; Pitts, Todd Alan; Zollweg, Joshua David; Anderson, Dylan Z.; Nandy, Prabal; Whitlow, Gary L.; Bender, Daniel A.; Byrne, Raymond Harry

    2015-01-01

    Low signal-to-noise data processing algorithms for improved detection, tracking, discrimination and situational threat assessment are a key research challenge. As sensor technologies progress, the number of pixels will increase signi cantly. This will result in increased resolution, which could improve object discrimination, but unfortunately, will also result in a significant increase in the number of potential targets to track. Many tracking techniques, like multi-hypothesis trackers, suffer from a combinatorial explosion as the number of potential targets increase. As the resolution increases, the phenomenology applied towards detection algorithms also changes. For low resolution sensors, "blob" tracking is the norm. For higher resolution data, additional information may be employed in the detection and classfication steps. The most challenging scenarios are those where the targets cannot be fully resolved, yet must be tracked and distinguished for neighboring closely spaced objects. Tracking vehicles in an urban environment is an example of such a challenging scenario. This report evaluates several potential tracking algorithms for large-scale tracking in an urban environment.

  17. Large-Scale Testing of Effects of Anti-Foam Agent on Gas Holdup in Process Vessels in the Hanford Waste Treatment Plant - 8280

    SciTech Connect (OSTI)

    Mahoney, Lenna A.; Alzheimer, James M.; Arm, Stuart T.; Guzman-Leong, Consuelo E.; Jagoda, Lynette K.; Stewart, Charles W.; Wells, Beric E.; Yokuda, Satoru T.

    2008-06-03

    The Hanford Waste Treatment Plant (WTP) will vitrify the radioactive wastes stored in underground tanks. These wastes generate and retain hydrogen and other flammable gases that create safety concerns for the vitrification process tanks in the WTP. An anti-foam agent (AFA) will be added to the WTP process streams. Prior testing in a bubble column and a small-scale impeller-mixed vessel indicated that gas holdup in a high-level waste chemical simulant with AFA was up to 10 times that in clay simulant without AFA. This raised a concern that major modifications to the WTP design or qualification of an alternative AFA might be required to satisfy plant safety criteria. However, because the mixing and gas generation mechanisms in the small-scale tests differed from those expected in WTP process vessels, additional tests were performed in a large-scale prototypic mixing system with in situ gas generation. This paper presents the results of this test program. The tests were conducted at Pacific Northwest National Laboratory in a ¼-scale model of the lag storage process vessel using pulse jet mixers and air spargers. Holdup and release of gas bubbles generated by hydrogen peroxide decomposition were evaluated in waste simulants containing an AFA over a range of Bingham yield stresses and gas gen geration rates. Results from the ¼-scale test stand showed that, contrary to the small-scale impeller-mixed tests, gas holdup in clay without AFA is comparable to that in the chemical waste simulant with AFA. The test stand, simulants, scaling and data-analysis methods, and results are described in relation to previous tests and anticipated WTP operating conditions.

  18. Large-Scale Testing of Effects of Anti-Foam Agent on Gas Holdup in Process Vessels in the Hanford Waste Treatment Plant

    SciTech Connect (OSTI)

    Mahoney, L.A.; Alzheimer, J.M.; Arm, S.T.; Guzman-Leong, C.E.; Jagoda, L.K.; Stewart, C.W.; Wells, B.E.; Yokuda, S.T. [Pacific Northwest National Laboratory, Richland, WA (United States)

    2008-07-01

    The Hanford Waste Treatment and Immobilization Plant (WTP) will vitrify the radioactive wastes stored in underground tanks. These wastes generate and retain hydrogen and other flammable gases that create safety concerns for the vitrification process tanks in the WTP. An anti-foam agent (AFA) will be added to the WTP process streams. Previous testing in a bubble column and a small-scale impeller-mixed vessel indicated that gas holdup in a high-level waste chemical simulant with AFA was as much as 10 times higher than in clay simulant without AFA. This raised a concern that major modifications to the WTP design or qualification of an alternative AFA might be required to satisfy plant safety criteria. However, because the mixing and gas generation mechanisms in the small-scale tests differed from those expected in WTP process vessels, additional tests were performed in a large-scale prototypic mixing system with in situ gas generation. This paper presents the results of this test program. The tests were conducted at Pacific Northwest National Laboratory in a 1/4-scale model of the lag storage process vessel using pulse jet mixers and air spargers. Holdup and release of gas bubbles generated by hydrogen peroxide decomposition were evaluated in waste simulants containing an AFA over a range of Bingham yield stresses and gas generation rates. Results from the 1/4-scale test stand showed that, contrary to the small-scale impeller-mixed tests, holdup in the chemical waste simulant with AFA was not so greatly increased compared to gas holdup in clay without AFA. The test stand, simulants, scaling and data-analysis methods, and results are described in relation to previous tests and anticipated WTP operating conditions. (authors)

  19. NREL: Wind Research - Testing

    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 NewsInformationJessework usesofPublications The NREL wind research program

  20. Small Wind Independent Testing (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-09-01

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

  1. Wind Program Announces $2 Million to Develop and Field Test Wind...

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

    Wind Program Announces 2 Million to Develop and Field Test Wind Energy Bat Impact Minimization Technologies Wind Program Announces 2 Million to Develop and Field Test Wind Energy...

  2. Wind Technology Testing Center Acquires New Blade Fatigue Test...

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

    multimegawatt wind turbine blade flap fatigue test. Addthis Related Articles DOE's New Large Blade Test Facility in Massachusetts Completes First Commercial Blade Tests...

  3. Sparkr Blade Test Centre Static tests of wind turbine blades

    E-Print Network [OSTI]

    Sparkær Blade Test Centre Static tests of wind turbine blades Static blade tests are performed down- and up-wind direction, and in the rotor thrust direction and opposite to that, respectively-4000 Roskilde Denmark www.risoe.dk Wind Energy Department Sparkær Blade test Centre vea@risoe.dk Tel

  4. Room-temperature stationary sodium-ion batteries for large-scale electric energy storage

    E-Print Network [OSTI]

    Wang, Wei Hua

    Room-temperature stationary sodium-ion batteries for large-scale electric energy storage Huilin Pan attention particularly in large- scale electric energy storage applications for renewable energy and smart, such as the wind and the sun, large-scale electric energy storage systems are becoming extremely important

  5. The Great Plains Wind Power Test Facility

    SciTech Connect (OSTI)

    Schroeder, John

    2014-01-31

    This multi-year, multi-faceted project was focused on the continued development of a nationally-recognized facility for the testing, characterization, and improvement of grid-connected wind turbines, integrated wind-water desalination systems, and related educational and outreach topics. The project involved numerous faculty and graduate students from various engineering departments, as well as others from the departments of Geosciences (in particular the Atmospheric Science Group) and Economics. It was organized through the National Wind Institute (NWI), which serves as an intellectual hub for interdisciplinary and transdisciplinary research, commercialization and education related to wind science, wind energy, wind engineering and wind hazard mitigation at Texas Tech University (TTU). Largely executed by an academic based team, the project resulted in approximately 38 peer-reviewed publications, 99 conference presentations, the development/expansion of several experimental facilities, and two provisional patents.

  6. NREL Small Wind Turbine Test Project: Mariah Power's Windspire Wind Turbine Test Chronology

    SciTech Connect (OSTI)

    Huskey, A.; Forsyth, T.

    2009-06-01

    This report presents a chronology of tests conducted at NREL's National Wind Technology Center on Mariah Power's Windspire 1.2-kW wind turbine and a letter of response from Mariah Power.

  7. Combined Experiment Phase 1. [Horizontal axis wind turbines: wind tunnel testing versus field testing

    SciTech Connect (OSTI)

    Butterfield, C.P.; Musial, W.P.; Simms, D.A.

    1992-10-01

    How does wind tunnel airfoil data differ from the airfoil performance on an operating horizontal axis wind turbine (HAWT) The National Renewable Energy laboratory has been conducting a comprehensive test program focused on answering this question and understanding the basic fluid mechanics of rotating HAWT stall aerodynamics. The basic approach was to instrument a wind rotor, using an airfoil that was well documented by wind tunnel tests, and measure operating pressure distributions on the rotating blade. Based an the integrated values of the pressure data, airfoil performance coefficients were obtained, and comparisons were made between the rotating data and the wind tunnel data. Care was taken to the aerodynamic and geometric differences between the rotating and the wind tunnel models. This is the first of two reports describing the Combined Experiment Program and its results. This Phase I report covers background information such as test setup and instrumentation. It also includes wind tunnel test results and roughness testing.

  8. Channel Meander Migration in Large-Scale Physical Model Study 

    E-Print Network [OSTI]

    Yeh, Po Hung

    2010-10-12

    A set of large-scale laboratory experiments were conducted to study channel meander migration. Factors affecting the migration of banklines, including the ratio of curvature to channel width, bend angle, and the Froude number were tested...

  9. Advanced Control Design and Testing for Wind Turbines at the...

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

    Control Design and Testing for Wind Turbines at the National Renewable Energy Laboratory: Preprint Advanced Control Design and Testing for Wind Turbines at the National Renewable...

  10. NREL, Clemson University Collaborate on Wind Energy Testing Facilities...

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

    NREL, Clemson University Collaborate on Wind Energy Testing Facilities NREL, Clemson University Collaborate on Wind Energy Testing Facilities September 16, 2015 - 6:55pm Addthis A...

  11. A Robust Data Delivery Protocol for Large Scale Sensor Networks

    E-Print Network [OSTI]

    California at Los Angeles, University of

    by the sender. GRAB design harnesses the advantage of large scale and relies on the col- lective e#11;orts simulation exper- iments, GRAB can successfully deliver above 90% of data with relatively low energy cost the small, power-limited sensor nodes are prone to errors. Severe operational conditions (e.g. strong wind

  12. Building State-of-the-Art Wind Technology Testing Facilities (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-03-01

    The new Wind Technology Test Center is the only facility in the nation capable of testing wind turbine blades up to 90 meters in length. A critical factor to wind turbine design and development is the ability to test new designs, components, and materials. In addition, wind turbine blade manufacturers are required to test their blades as part of the turbine certification process. The National Renewable Energy Laboratory (NREL) partnered with the U.S. Department of Energy (DOE) Wind Program and the Massachusetts Clean Energy Center (MassCEC) to design, construct, and operate the Wind Technology Center (WTTC) in Boston, Massachusetts. The WTTC offers a full suite of certification tests for turbine blades up to 90 meters in length. NREL worked closely with MTS Systems Corporation to develop the novel large-scale test systems needed to conduct the static and fatigue tests required for certification. Static tests pull wind turbine blades horizontally and vertically to measure blade deflection and strains. Fatigue tests cycle the blades millions of times to simulate what a blade goes through in its lifetime on a wind turbine. For static testing, the WTTC is equipped with servo-hydraulic winches and cylinders that are connected to the blade through cables to apply up to an 84-mega Newton meter maximum static bending moment. For fatigue testing, MTS developed a commercial version of NREL's patented resonant excitation system with hydraulic cylinders that actuate linear moving masses on the blade at one or more locations. This system applies up to a 21-meter tip-to-tip fatigue test tip displacement to generate 20-plus years of cyclic field loads in a matter of months. NREL also developed and supplied the WTTC with an advanced data acquisition system capable of measuring and recording hundreds of data channels at very fast sampling rates while communicating with test control systems.

  13. Conundrum of the Large Scale Streaming

    E-Print Network [OSTI]

    T. M. Malm

    1999-09-12

    The etiology of the large scale peculiar velocity (large scale streaming motion) of clusters would increasingly seem more tenuous, within the context of the gravitational instability hypothesis. Are there any alternative testable models possibly accounting for such large scale streaming of clusters?

  14. Sensitivity analysis for joint inversion of ground-penetrating radar and thermal-hydrological data from a large-scale underground heater test

    E-Print Network [OSTI]

    Kowalsky, M.B.; Birkholzer, J.; Peterson, J.; Finsterle, S.; Mukhopadhya y, S.; Tsang, Y.T.

    2008-01-01

    investigations at Yucca Mountain, Nevada, the potentialin the Unsaturated Zone, Yucca Mountain, Nevada,” U.S. Geol.with the Drift Scale Test at Yucca Mountain, Nevada,” J. of

  15. RELAP5/MOD3 simulation of the loss of residual heat removal during midloop operation experiment conducted at the ROSA-IV/ Large Scale Test Facility 

    E-Print Network [OSTI]

    Banerjee, Sibashis Sanatkumar

    1994-01-01

    for 3040 seconds. The ROSA-1-V/]LsTF is one of the largest test facilities in the world and is located in Japan. It is a volumetrically scaled (1/48) full height, two loop model of a Westinghouse four loop pressurized water reactor (PWR). The facility...

  16. Large-Scale Information Systems

    SciTech Connect (OSTI)

    D. M. Nicol; H. R. Ammerlahn; M. E. Goldsby; M. M. Johnson; D. E. Rhodes; A. S. Yoshimura

    2000-12-01

    Large enterprises are ever more dependent on their Large-Scale Information Systems (LSLS), computer systems that are distinguished architecturally by distributed components--data sources, networks, computing engines, simulations, human-in-the-loop control and remote access stations. These systems provide such capabilities as workflow, data fusion and distributed database access. The Nuclear Weapons Complex (NWC) contains many examples of LSIS components, a fact that motivates this research. However, most LSIS in use grew up from collections of separate subsystems that were not designed to be components of an integrated system. For this reason, they are often difficult to analyze and control. The problem is made more difficult by the size of a typical system, its diversity of information sources, and the institutional complexities associated with its geographic distribution across the enterprise. Moreover, there is no integrated approach for analyzing or managing such systems. Indeed, integrated development of LSIS is an active area of academic research. This work developed such an approach by simulating the various components of the LSIS and allowing the simulated components to interact with real LSIS subsystems. This research demonstrated two benefits. First, applying it to a particular LSIS provided a thorough understanding of the interfaces between the system's components. Second, it demonstrated how more rapid and detailed answers could be obtained to questions significant to the enterprise by interacting with the relevant LSIS subsystems through simulated components designed with those questions in mind. In a final, added phase of the project, investigations were made on extending this research to wireless communication networks in support of telemetry applications.

  17. Riso-M-2546 g Wind Turbine Test

    E-Print Network [OSTI]

    Riso-M-2546 g Wind Turbine Test Wind Matic WM 17S Troels Friis Pedersen The Test Station for Windmills Riso National Laboratory, DK-4000 Roskilde Denmark April 1986 #12;#12;RIS0-M-2546 WIND TURBINE describes standard measurements performed on a Wind-Matic WM 17S, 75 kW wind turbine. The measurements

  18. Blade Testing at NREL's National Wind Technology Center (NWTC) (Presentation)

    SciTech Connect (OSTI)

    Hughes, S.

    2010-07-20

    Presentation of Blade Testing at NREL's National Wind Technology Center for the 2010 Sandia National Laboratories Blade Testing Workshop.

  19. Establishment of Small Wind Turbine Regional Test Centers (Presentation)

    SciTech Connect (OSTI)

    Sinclair, K.

    2011-09-16

    This presentation offers an overview of the Regional Test Centers project for Small Wind Turbine testing and certification.

  20. Establishment of Small Wind Regional Test Centers

    SciTech Connect (OSTI)

    Jimenez, T.; Forsyth, T.; Huskey, A.; Mendoza, I.; Sinclair, K.; Smith, J.

    2011-01-01

    The rapid growth of the small wind turbine (SWT) market is attracting numerous entrants. Small wind turbine purchasers now have many options, but often lack information (such as third-party certification) to select a quality turbine. Most SWTs do not have third-party certification due to the expense and difficulty of the certification process. Until recently, the only SWT certification bodies were in Europe. In North America, testing has been limited to a small number of U.S. Department of Energy (DOE) subsidized tests conducted at the National Renewable Energy Laboratory's (NREL) National Wind Technology Center (NWTC) under the ongoing Independent Testing Project. During the past few years, DOE, the National Renewable Energy Laboratory (NREL), and some states have worked with the North American SWT industry to create a SWT certification infrastructure. The goal is to increase the number of certified turbines and gain greater consumer confidence in SWT technology. The American Wind Energy Association (AWEA) released the AWEA Small Wind Turbine Performance and Safety Standard, AWEA Standard 9.1 - 2009, in December 2009. The Small Wind Certification Council (SWCC) and Intertek, North American SWT certification bodies, began accepting applications for certification to the AWEA standard in 2010. To reduce certification testing costs, DOE and NREL are providing financial and technical assistance for an initial round of tests at four SWT test sites, which were selected through a competitive solicitation. The four organizations selected are Windward Engineering (Utah), The Alternative Energy Institute at West Texas A and M (Texas), a consortium consisting of Kansas State University and Colby Community College (Kansas), and Intertek (New York). Each organization will test two small wind turbines as part of their respective subcontracts with DOE and NREL. The testing results will be made publically available. The goal is to establish a lower-cost U.S. small wind testing capability that will lead to increased SWT certification. Turbine installation is ongoing. Testing began in early 2011 and is scheduled to conclude in mid-late 2012.

  1. Investigation of CO2 plume behavior for a large-scale pilot test of geologic carbon storage in a saline formation

    SciTech Connect (OSTI)

    Doughty, C.

    2009-04-01

    The hydrodynamic behavior of carbon dioxide (CO{sub 2}) injected into a deep saline formation is investigated, focusing on trapping mechanisms that lead to CO{sub 2} plume stabilization. A numerical model of the subsurface at a proposed power plant with CO{sub 2} capture is developed to simulate a planned pilot test, in which 1,000,000 metric tons of CO{sub 2} is injected over a four-year period, and the subsequent evolution of the CO{sub 2} plume for hundreds of years. Key measures are plume migration distance and the time evolution of the partitioning of CO{sub 2} between dissolved, immobile free-phase, and mobile free-phase forms. Model results indicate that the injected CO{sub 2} plume is effectively immobilized at 25 years. At that time, 38% of the CO{sub 2} is in dissolved form, 59% is immobile free phase, and 3% is mobile free phase. The plume footprint is roughly elliptical, and extends much farther up-dip of the injection well than down-dip. The pressure increase extends far beyond the plume footprint, but the pressure response decreases rapidly with distance from the injection well, and decays rapidly in time once injection ceases. Sensitivity studies that were carried out to investigate the effect of poorly constrained model parameters permeability, permeability anisotropy, and residual CO{sub 2} saturation indicate that small changes in properties can have a large impact on plume evolution, causing significant trade-offs between different trapping mechanisms.

  2. Wind Turbine Generator System Acoustic Noise Test Report for the Gaia Wind 11-kW Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.

    2011-11-01

    This report details the acoustic noise test conducted on the Gaia-Wind 11-kW wind turbine at the National Wind Technology Center. The test turbine is a two- bladed, downwind wind turbine with a rated power of 11 kW. The test turbine was tested in accordance with the International Electrotechnical Commission standard, IEC 61400-11 Ed 2.1 2006-11 Wind Turbine Generator Systems -- Part 11 Acoustic Noise Measurement Techniques.

  3. High Performance Electronic Structure Engineering: Large Scale...

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

    High Performance Electronic Structure Engineering: Large Scale GW Calculations Event Sponsor: Argonne Leadership Computing Facility Seminar Start Date: Aug 7 2015 - 10:00am...

  4. 2D MHD MODELS OF THE LARGE SCALE SOLAR Eirik Endeve

    E-Print Network [OSTI]

    California at Berkeley, University of

    by the ideal gas law, P 2nkT. In order to study the acceleration of high- and low- speed solar wind one must2D MHD MODELS OF THE LARGE SCALE SOLAR CORONA Eirik Endeve£ , Thomas E. Holzer and Egil Leer to determine the structure of the large scale solar corona. When our numerical calculations are initiated

  5. Microfluidic Large-Scale Integration: The Evolution

    E-Print Network [OSTI]

    Quake, Stephen R.

    Microfluidic Large-Scale Integration: The Evolution of Design Rules for Biological Automation, polydimethylsiloxane Abstract Microfluidic large-scale integration (mLSI) refers to the develop- ment of microfluidic, are discussed. Several microfluidic components used as building blocks to create effective, complex, and highly

  6. Management of Large-Scale International

    E-Print Network [OSTI]

    Management of Large- Scale International Science Projects Dr. Benjamin J. Cross, P.E. Savannah of Government Commerce) #12;Extending Project Management to New, Complex Challenges · Emergence of large-scale-of-the-art R&D and technologies ­ Exceedingly high energies, temperatures, radiological conditions, special

  7. DLFM library tools for large scale dynamic applications.

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

    DLFM library tools for large scale dynamic applications DLFM library tools for large scale dynamic applications Large scale Python and other dynamic applications may spend huge...

  8. Wind Turbine Test \\^ind Matic WM 15S

    E-Print Network [OSTI]

    00 ·2 V. v/ RisoM-2481 Wind Turbine Test \\^ind Matic WM 15S Troels Friis Pedersent The Test Station for Windmills Riso National Laboratory, DK-4000 Roskilde, Denmark July 1986 #12;#12;RIS0-M-2481 WIND TURBINE describes standard measurements performed on a Wind-Matic WM 15S, 55 kW wind turbine. The measurements

  9. Large scale quantum mechanical enzymology

    E-Print Network [OSTI]

    Lever, Greg

    2014-10-07

    the problems of another community. One such example is when the importance of structural Introduction 5 heterogeneity in proteins was first revealed through experiments on myoglobin [16], using the cryogenic tools available to condensed matter physicists... it in fact be best to work relative to the calculated freezing point ? Whichever field it is applied to and whatever science underlies it, the testing of a simulation method is a vital part of any investigation and is a central theme in this dissertation. 1...

  10. Advanced Wind Energy Projects Test Facility Moving to Texas Tech...

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

    Wind Energy Projects Test Facility Moving to Texas Tech University Advanced Wind Energy Projects Test Facility Moving to Texas Tech University December 19, 2011 - 1:32pm Addthis...

  11. Program Management for Large Scale Engineering Programs

    E-Print Network [OSTI]

    Oehmen, Josef

    The goal of this whitepaper is to summarize the LAI research that applies to program management. The context of most of the research discussed in this whitepaper are large-scale engineering programs, particularly in the ...

  12. New Wind Test Facilities Open in Colorado and South Carolina...

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

    largest state-of-the-art drivetrain test facilities are now open for business: the Wind Turbine Drivetrain Testing Facility at the Clemson University Restoration Institute in...

  13. Ris-R-1209(EN) European Wind Turbine Testing

    E-Print Network [OSTI]

    Risø-R-1209(EN) European Wind Turbine Testing Procedure Developments Task 1: Measurement Method to Verify Wind Turbine Performance Character- istics Raymond Hunter RES Task coordinator Troels Friis assessment and wind turbine power performance testing. A standards maintenance team is revising the current

  14. Duration Test Report for the Entegrity EW50 Wind Turbine

    SciTech Connect (OSTI)

    Smith, J.; Huskey, A.; Jager, D.; Hur, J.

    2012-12-01

    This report summarizes the results of a duration test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

  15. Wind Turbine Generator System Safety and Function Test Report for the Entegrity EW50 Wind Turbine

    SciTech Connect (OSTI)

    Smith, J.; Huskey, A.; Jager, D.; Hur, J.

    2012-11-01

    This report summarizes the results of a safety and function test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

  16. Wind Turbine Generator System Safety and Function Test Report for the Ventera VT10 Wind Turbine

    SciTech Connect (OSTI)

    Smith, J.; Huskey, A.; Jager, D.; Hur, J.

    2012-11-01

    This report summarizes the results of a safety and function test that NREL conducted on the Ventera VT10 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

  17. Wind Turbine Generator System Power Performance Test Report for the Entegrity EW50 Wind Turbine

    SciTech Connect (OSTI)

    Smith, J.; Huskey, A.; Jager, D.; Hur, J.

    2011-05-01

    Report on the results of the power performance test that the National Renewable Energy Laboratory (NREL) conducted on Entegrity Wind System Inc.'s EW50 small wind turbine.

  18. NREL Controllable Grid Interface for Testing MW-Scale Wind Turbine

    Office of Scientific and Technical Information (OSTI)

    Controllable Grid Interface for Testing MW-Scale Wind Turbine Generators (Poster) McDade, M.; Gevorgian, V.; Wallen, R.; Erdman, W. 17 WIND ENERGY WIND TURBINE TESTING;...

  19. Large-scale gyrokinetic particle simulation of

    E-Print Network [OSTI]

    Oliker, Leonid

    areas of research including plasma astrophysics and fusion energy science. Fusion is the power source that are still needed to make fusion energy a practical realization. Research in plasma science requiresLarge-scale gyrokinetic particle simulation of microturbulence in magnetically confined fusion

  20. Wind Turbine Safety and Function Test Report for the Mariah Windspire Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.; Bowen, A.; Jager, D.

    2010-07-01

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers to wind energy expansion by providing independent testing results for small wind turbines (SWT). In total, five turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests performed on the turbines, including power performance, duration, noise, and power-quality tests. NWTC testing results provide manufacturers with reports that may be used to meet part of small wind turbine certification requirements. The test equipment includes a Mariah Windspire wind turbine mounted on a monopole tower. L&E Machine manufactured the turbine in the United States. The inverter was manufactured separately by Technology Driven Products in the United States. The system was installed by the NWTC site operations group with guidance and assistance from Mariah Power.

  1. Wind Turbine Generator System Power Quality Test Report for the Gaia Wind 11-kW Wind Turbine

    SciTech Connect (OSTI)

    Curtis, A.; Gevorgian, V.

    2011-07-01

    This report details the power quality test on the Gaia Wind 11-kW Wind Turbine as part of the U.S. Department of Energy's Independent Testing Project. In total five turbines are being tested as part of the project. Power quality testing is one of up to five test that may be performed on the turbines including power performance, safety and function, noise, and duration tests. The results of the testing provide manufacturers with reports that may be used for small wind turbine certification.

  2. The Phoenix series large scale LNG pool fire experiments.

    SciTech Connect (OSTI)

    Simpson, Richard B.; Jensen, Richard Pearson; Demosthenous, Byron; Luketa, Anay Josephine; Ricks, Allen Joseph; Hightower, Marion Michael; Blanchat, Thomas K.; Helmick, Paul H.; Tieszen, Sheldon Robert; Deola, Regina Anne; Mercier, Jeffrey Alan; Suo-Anttila, Jill Marie; Miller, Timothy J.

    2010-12-01

    The increasing demand for natural gas could increase the number and frequency of Liquefied Natural Gas (LNG) tanker deliveries to ports across the United States. Because of the increasing number of shipments and the number of possible new facilities, concerns about the potential safety of the public and property from an accidental, and even more importantly intentional spills, have increased. While improvements have been made over the past decade in assessing hazards from LNG spills, the existing experimental data is much smaller in size and scale than many postulated large accidental and intentional spills. Since the physics and hazards from a fire change with fire size, there are concerns about the adequacy of current hazard prediction techniques for large LNG spills and fires. To address these concerns, Congress funded the Department of Energy (DOE) in 2008 to conduct a series of laboratory and large-scale LNG pool fire experiments at Sandia National Laboratories (Sandia) in Albuquerque, New Mexico. This report presents the test data and results of both sets of fire experiments. A series of five reduced-scale (gas burner) tests (yielding 27 sets of data) were conducted in 2007 and 2008 at Sandia's Thermal Test Complex (TTC) to assess flame height to fire diameter ratios as a function of nondimensional heat release rates for extrapolation to large-scale LNG fires. The large-scale LNG pool fire experiments were conducted in a 120 m diameter pond specially designed and constructed in Sandia's Area III large-scale test complex. Two fire tests of LNG spills of 21 and 81 m in diameter were conducted in 2009 to improve the understanding of flame height, smoke production, and burn rate and therefore the physics and hazards of large LNG spills and fires.

  3. South Carolina Opens Nation's Largest Wind Drivetrain Testing...

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

    also makes it ideal for American and international companies to testing larger offshore wind turbines. Supported by a 47 million Energy Department investment as well as about 60...

  4. South Carolina Opens Nation's Largest Wind Drivetrain Testing...

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

    the facility will help test and validate new turbines, particularly for offshore wind-helping to speed deployment of next generation energy technology, reduce costs for...

  5. South Carolina Opens Nation's Largest Wind Drivetrain Testing...

    Energy Savers [EERE]

    South Carolina. The facility will help test and validate new turbines, particularly for offshore wind- helping to speed deployment of next generation energy technology,...

  6. Power Performance Test Report for the SWIFT Wind Turbine

    SciTech Connect (OSTI)

    Mendoza, I.; Hur, J.

    2012-12-01

    This report summarizes the results of a power performance test that NREL conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 12: Power Performance Measurements of Electricity Producing Wind Turbines, IEC 61400-12-1 Ed.1.0, 2005-12. However, because the SWIFT is a small turbine as defined by IEC, NREL also followed Annex H that applies to small wind turbines. In these summary results, wind speed is normalized to sea-level air density.

  7. The Effective Field Theory of Cosmological Large Scale Structures...

    Office of Scientific and Technical Information (OSTI)

    The Effective Field Theory of Cosmological Large Scale Structures Citation Details In-Document Search Title: The Effective Field Theory of Cosmological Large Scale Structures...

  8. The Effective Field Theory of Cosmological Large Scale Structures...

    Office of Scientific and Technical Information (OSTI)

    The Effective Field Theory of Cosmological Large Scale Structures Citation Details In-Document Search Title: The Effective Field Theory of Cosmological Large Scale Structures ...

  9. ACCOLADES: A Scalable Workflow Framework for Large-Scale Simulation...

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

    ACCOLADES: A Scalable Workflow Framework for Large-Scale Simulation and Analyses of Automotive Engines Title ACCOLADES: A Scalable Workflow Framework for Large-Scale Simulation and...

  10. Large Scale Computing and Storage Requirements for Advanced Scientific...

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

    Large Scale Computing and Storage Requirements for Advanced Scientific Computing Research: Target 2014 ASCRFrontcover.png Large Scale Computing and Storage Requirements for...

  11. Overcoming the Barrier to Achieving Large-Scale Production -...

    Office of Environmental Management (EM)

    Overcoming the Barrier to Achieving Large-Scale Production - A Case Study Overcoming the Barrier to Achieving Large-Scale Production - A Case Study This presentation summarizes the...

  12. Wind Turbine Generator System Duration Test Report for the Mariah Power Windspire Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.; Bowen, A.; Jager, D.

    2010-05-01

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of the first round of this project. Duration testing is one of up to five tests that may be performed on the turbines. Other tests include power performance, safety and function, noise, and power quality tests. NWTC testing results provide manufacturers with reports that may be used to meet part of small wind turbine certification requirements. This duration test report focuses on the Mariah Power Windspire wind turbine.

  13. Dual-Axis Resonance Testing of Wind Turbine Blades

    Energy Innovation Portal (Marketing Summaries) [EERE]

    2014-07-28

    Wind turbine blades must undergo strength and fatigue testing in order to be rated and marketed appropriately. Presently, wind turbine blades are fatigue-tested in the flapwise direction and in the edgewise direction independently. This testing involves placing the blades through 1 to 10 million or more load or fatigue cycles, which may take 3 to 12 months or more to complete for each tested direction. There is a need for blade testing techniques that are less expensive to use and require...

  14. NREL: Wind Research - Small Wind Turbine Independent Testing

    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 lightGeospatialDevelopment of Marine andDrivetrainsNewSite WindSmall Wind

  15. Duration Test Report for the Ventera VT10 Wind Turbine

    SciTech Connect (OSTI)

    Smith, J.; Huskey, A.; Jager, D.; Hur, J.

    2013-06-01

    This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small wind turbines. Five turbines were tested at the National Wind Technology Center (NWTC) at the National Renewable Energy Laboratory (NREL) as a part of round one of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality. Test results will provide manufacturers with reports that can be used to fulfill part of the requirements for small wind turbine certification. The test equipment included a grid-connected Ventera Energy Corporation VT10 wind turbine mounted on an 18.3-m (60-ft) self-supporting lattice tower manufactured by Rohn.

  16. Safety and Function Test Report for the SWIFT Wind Turbine

    SciTech Connect (OSTI)

    Mendoza, I.; Hur, J.

    2013-01-01

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. Three turbines where selected for testing at the National Wind Technology Center (NWTC) as a part of round two of the Small Wind Turbine Independent Testing project. Safety and Function testing is one of up to 5 tests that may be performed on the turbines. Other tests include power performance, duration, noise, and power quality. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification.

  17. Duration Test Report for the SWIFT Wind Turbine

    SciTech Connect (OSTI)

    Mendoza, I.; Hur, J.

    2013-01-01

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. Three turbines where selected for testing at the National Wind Technology Center (NWTC) as a part of round two of the Small Wind Turbine Independent Testing project. Duration testing is one of up to 5 tests that may be performed on the turbines. Other tests include power performance, safety and function, noise, and power quality. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification.

  18. Duration Test Report for the Viryd CS8 Wind Turbine

    SciTech Connect (OSTI)

    Roadman, J.; Murphy, M.; van Dam, J.

    2013-06-01

    This report summarizes the results of a duration noise test that the National Renewable Energy Laboratory (NREL) conducted on the Viryd CS8 wind turbine. This test was conducted in accordance with Clause 9.4 of the International Electrotechnical Commission's (IEC) standard, Wind turbines - Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed. 2.0:2006-03. NREL researchers evaluated the turbine based on structural integrity and material degradation, quality of environmental protection, and dynamic behavior.

  19. Wind Turbine Safety and Function Test Report for the ARE 442 Wind Turbine

    SciTech Connect (OSTI)

    van Dam, J.; Baker, D.; Jager, D.

    2010-02-01

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, four turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests that were performed on the turbines, including power performance, duration, noise, and power quality tests. Test results provide manufacturers with reports that can be used for small wind turbine certification. The test equipment includes an ARE 442 wind turbine mounted on a 100-ft free-standing lattice tower. The system was installed by the NWTC Site Operations group with guidance and assistance from Abundant Renewable Energy.

  20. Wind Turbine Generator System Duration Test Report for the Gaia-Wind 11 kW Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.; Bowen, A.; Jager, D.

    2010-09-01

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Renewable Energy Laboratory's (NRELs) National Wind Technology Center (NWTC) as a part of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a Gaia-Wind 11 kW wind turbine mounted on an 18 m monopole tower. Gaia-Wind Ltd. manufactured the turbine in Denmark, although the company is based in Scotland. The system was installed by the NWTC Site Operations group with guidance and assistance from Gaia-Wind.

  1. Wind Turbine Generator System Acoustic Noise Test Report for the ARE 442 Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.; van Dam, J.

    2010-11-01

    This test was conducted on the ARE 442 as part of the U.S. Department of Energy's (DOE's) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of this project. Acoustic noise testing is one of up to five tests that may be performed on the turbines, including duration, safety and function, power performance, and power quality tests. The acoustic noise test was conducted to the IEC 61400-11 Edition 2.1.

  2. Large-Scale PV Integration Study

    SciTech Connect (OSTI)

    Lu, Shuai; Etingov, Pavel V.; Diao, Ruisheng; Ma, Jian; Samaan, Nader A.; Makarov, Yuri V.; Guo, Xinxin; Hafen, Ryan P.; Jin, Chunlian; Kirkham, Harold; Shlatz, Eugene; Frantzis, Lisa; McClive, Timothy; Karlson, Gregory; Acharya, Dhruv; Ellis, Abraham; Stein, Joshua; Hansen, Clifford; Chadliev, Vladimir; Smart, Michael; Salgo, Richard; Sorensen, Rahn; Allen, Barbara; Idelchik, Boris

    2011-07-29

    This research effort evaluates the impact of large-scale photovoltaic (PV) and distributed generation (DG) output on NV Energy’s electric grid system in southern Nevada. It analyzes the ability of NV Energy’s generation to accommodate increasing amounts of utility-scale PV and DG, and the resulting cost of integrating variable renewable resources. The study was jointly funded by the United States Department of Energy and NV Energy, and conducted by a project team comprised of industry experts and research scientists from Navigant Consulting Inc., Sandia National Laboratories, Pacific Northwest National Laboratory and NV Energy.

  3. 1 National Roadmap Committee for Large-Scale Research Facilities the netherlands' roadmap for large-scale research facilities

    E-Print Network [OSTI]

    Horn, David

    #12;1 National Roadmap Committee for Large-Scale Research Facilities the netherlands' roadmap for large-scale research facilities #12;2 National Roadmap Committee for Large-Scale Research Facilities1 by Roselinde Supheert) #12;3 National Roadmap Committee for Large-Scale Research Facilities The Netherlands

  4. National Wind Tecnology Center Provides Dual Axis Resonant Blade Testing

    ScienceCinema (OSTI)

    Felker, Fort

    2014-06-10

    NREL's Structural Testing Laboratory at the National Wind Technology Center (NWTC) provides experimental laboratories, computer facilities for analytical work, space for assembling components and turbines for atmospheric testing as well as office space for industry researchers. Fort Felker, center director at the NWTC, discusses NREL's state-of-the-art structural testing capabilities and shows a flapwise and edgewise blade test in progress.

  5. National Wind Tecnology Center Provides Dual Axis Resonant Blade Testing

    SciTech Connect (OSTI)

    Felker, Fort

    2013-11-13

    NREL's Structural Testing Laboratory at the National Wind Technology Center (NWTC) provides experimental laboratories, computer facilities for analytical work, space for assembling components and turbines for atmospheric testing as well as office space for industry researchers. Fort Felker, center director at the NWTC, discusses NREL's state-of-the-art structural testing capabilities and shows a flapwise and edgewise blade test in progress.

  6. WIND TURBINE DRIVETRAIN TEST FACILITY DATA ACQUISITION SYSTEM

    SciTech Connect (OSTI)

    Mcintosh, J.

    2012-01-03

    The Wind Turbine Drivetrain Test Facility (WTDTF) is a state-of-the-art industrial facility used for testing wind turbine drivetrains and generators. Large power output wind turbines are primarily installed for off-shore wind power generation. The facility includes two test bays: one to accommodate turbine nacelles up to 7.5 MW and one for nacelles up to 15 MW. For each test bay, an independent data acquisition system (DAS) records signals from various sensors required for turbine testing. These signals include resistance temperature devices, current and voltage sensors, bridge/strain gauge transducers, charge amplifiers, and accelerometers. Each WTDTF DAS also interfaces with the drivetrain load applicator control system, electrical grid monitoring system and vibration analysis system.

  7. Batteries for Large Scale Energy Storage

    SciTech Connect (OSTI)

    Soloveichik, Grigorii L.

    2011-07-15

    In recent years, with the deployment of renewable energy sources, advances in electrified transportation, and development in smart grids, the markets for large-scale stationary energy storage have grown rapidly. Electrochemical energy storage methods are strong candidate solutions due to their high energy density, flexibility, and scalability. This review provides an overview of mature and emerging technologies for secondary and redox flow batteries. New developments in the chemistry of secondary and flow batteries as well as regenerative fuel cells are also considered. Advantages and disadvantages of current and prospective electrochemical energy storage options are discussed. The most promising technologies in the short term are high-temperature sodium batteries with ?”-alumina electrolyte, lithium-ion batteries, and flow batteries. Regenerative fuel cells and lithium metal batteries with high energy density require further research to become practical.

  8. Robust Morphological Measures for Large-Scale Structure

    E-Print Network [OSTI]

    T. Buchert

    1994-12-17

    A complete family of statistical descriptors for the morphology of large--scale structure based on Minkowski--Functionals is presented. These robust and significant measures can be used to characterize the local and global morphology of spatial patterns formed by a coverage of point sets which represent galaxy samples. Basic properties of these measures are highlighted and their relation to the `genus statistics' is discussed. Test models like a Poissonian point process and samples generated from a Voronoi--model are put into perspective.

  9. Establishment of Small Wind Regional Test Centers: Preprint

    SciTech Connect (OSTI)

    Jimenez, T.; Forsyth, T.; Huskey, A.; Mendoza, I.; Sinclair, K.; Smith, J.

    2011-03-01

    The rapid growth of the small wind turbine (SWT) market is attracting numerous entrants. Small wind turbine purchasers now have many options but often lack information (such as third-party certification) to select a quality turbine. Most SWTs do not have third-party certification due to the expense and difficulty of the certification process. Until recently, the only SWT certification bodies were in Europe. In North America, testing has been limited to a small number of U.S. Department of Energy (DOE) subsidized tests conducted at the National Wind Technology Center (NWTC) under the ongoing Independent Testing Project. Within the past few years, the DOE, National Renewable Energy Lab (NREL), and some states have worked with the North American SWT industry to create a SWT certification infrastructure. The goal is to increase the number of certified turbines and gain greater consumer confidence in SWT technology. The American Wind Energy Association (AWEA) released the AWEA Small Wind Turbine Performance and Safety Standard (AWEA Standard 9.1 - 2009) in December 2009. The Small Wind Certification Council (SWCC), a North American certification body, began accepting applications for certification to the AWEA standard in February 2010. To reduce certification testing costs, DOE/NREL is providing financial and technical assistance for an initial round of tests at four SWT test sites which were selected via a competitive solicitation. The four organizations selected are Windward Engineering (Utah), The Alternative Energy Institute at West Texas A&M (Texas), a consortium consisting of Kansas State University and Colby Community College (Kansas), and Intertek (New York). Each organization will test two small wind turbines as part of their respective subcontract with DOE/NREL. The testing results will be made publically available. The goal is to establish a lower-cost U.S. small wind testing capability that will lead to increased SWT certification.

  10. SMART Wind Turbine Rotor: Design and Field Test

    SciTech Connect (OSTI)

    Berg, Jonathan C.; Resor, Brian R.; Paquette, Joshua A.; White, Jonathan R.

    2014-01-29

    This report documents the design, fabrication, and testing of the SMART Rotor. This work established hypothetical approaches for integrating active aerodynamic devices (AADs) into the wind turbine structure and controllers.

  11. IEEE TRANSACTIONS ON POWER SYSTEMS 1 Large-Scale Integration of Deferrable

    E-Print Network [OSTI]

    Oren, Shmuel S.

    . Index Terms--Load management, power generation scheduling, wind power generation. I. INTRODUCTION on power system operations it is necessary to represent the balancing oper- ations of the remaining gridIEEE TRANSACTIONS ON POWER SYSTEMS 1 Large-Scale Integration of Deferrable Demand and Renewable

  12. Large-scale Probabilistic Forecasting in Energy Systems using Sparse Gaussian Conditional Random Fields

    E-Print Network [OSTI]

    Kolter, J. Zico

    in a wide range of energy systems, including forecasting demand, renewable generation, and electricityLarge-scale Probabilistic Forecasting in Energy Systems using Sparse Gaussian Conditional Random demonstrated that in the context of electrical demand and wind power, probabilistic forecasts can offer

  13. Locations of Smart Grid Demonstration and Large-Scale Energy...

    Office of Environmental Management (EM)

    Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Map of the United States...

  14. FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy...

    Office of Environmental Management (EM)

    FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects August 21, 2013 - 12:00am...

  15. Energy Department Loan Guarantee Would Support Large-Scale Rooftop...

    Energy Savers [EERE]

    Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S....

  16. Theoretical Tools for Large Scale Structure

    E-Print Network [OSTI]

    J. R. Bond; L. Kofman; D. Pogosyan; J. Wadsley

    1998-10-06

    We review the main theoretical aspects of the structure formation paradigm which impinge upon wide angle surveys: the early universe generation of gravitational metric fluctuations from quantum noise in scalar inflaton fields; the well understood and computed linear regime of CMB anisotropy and large scale structure (LSS) generation; the weakly nonlinear regime, where higher order perturbation theory works well, and where the cosmic web picture operates, describing an interconnected LSS of clusters bridged by filaments, with membranes as the intrafilament webbing. Current CMB+LSS data favour the simplest inflation-based $\\Lambda$CDM models, with a primordial spectral index within about 5% of scale invariant and $\\Omega_\\Lambda \\approx 2/3$, similar to that inferred from SNIa observations, and with open CDM models strongly disfavoured. The attack on the nonlinear regime with a variety of N-body and gas codes is described, as are the excursion set and peak-patch semianalytic approaches to object collapse. The ingredients are mixed together in an illustrative gasdynamical simulation of dense supercluster formation.

  17. Sensitivity technologies for large scale simulation.

    SciTech Connect (OSTI)

    Collis, Samuel Scott; Bartlett, Roscoe Ainsworth; Smith, Thomas Michael; Heinkenschloss, Matthias; Wilcox, Lucas C.; Hill, Judith C.; Ghattas, Omar; Berggren, Martin Olof; Akcelik, Volkan; Ober, Curtis Curry; van Bloemen Waanders, Bart Gustaaf; Keiter, Eric Richard

    2005-01-01

    Sensitivity analysis is critically important to numerous analysis algorithms, including large scale optimization, uncertainty quantification,reduced order modeling, and error estimation. Our research focused on developing tools, algorithms and standard interfaces to facilitate the implementation of sensitivity type analysis into existing code and equally important, the work was focused on ways to increase the visibility of sensitivity analysis. We attempt to accomplish the first objective through the development of hybrid automatic differentiation tools, standard linear algebra interfaces for numerical algorithms, time domain decomposition algorithms and two level Newton methods. We attempt to accomplish the second goal by presenting the results of several case studies in which direct sensitivities and adjoint methods have been effectively applied, in addition to an investigation of h-p adaptivity using adjoint based a posteriori error estimation. A mathematical overview is provided of direct sensitivities and adjoint methods for both steady state and transient simulations. Two case studies are presented to demonstrate the utility of these methods. A direct sensitivity method is implemented to solve a source inversion problem for steady state internal flows subject to convection diffusion. Real time performance is achieved using novel decomposition into offline and online calculations. Adjoint methods are used to reconstruct initial conditions of a contamination event in an external flow. We demonstrate an adjoint based transient solution. In addition, we investigated time domain decomposition algorithms in an attempt to improve the efficiency of transient simulations. Because derivative calculations are at the root of sensitivity calculations, we have developed hybrid automatic differentiation methods and implemented this approach for shape optimization for gas dynamics using the Euler equations. The hybrid automatic differentiation method was applied to a first order approximation of the Euler equations and used as a preconditioner. In comparison to other methods, the AD preconditioner showed better convergence behavior. Our ultimate target is to perform shape optimization and hp adaptivity using adjoint formulations in the Premo compressible fluid flow simulator. A mathematical formulation for mixed-level simulation algorithms has been developed where different physics interact at potentially different spatial resolutions in a single domain. To minimize the implementation effort, explicit solution methods can be considered, however, implicit methods are preferred if computational efficiency is of high priority. We present the use of a partial elimination nonlinear solver technique to solve these mixed level problems and show how these formulation are closely coupled to intrusive optimization approaches and sensitivity analyses. Production codes are typically not designed for sensitivity analysis or large scale optimization. The implementation of our optimization libraries into multiple production simulation codes in which each code has their own linear algebra interface becomes an intractable problem. In an attempt to streamline this task, we have developed a standard interface between the numerical algorithm (such as optimization) and the underlying linear algebra. These interfaces (TSFCore and TSFCoreNonlin) have been adopted by the Trilinos framework and the goal is to promote the use of these interfaces especially with new developments. Finally, an adjoint based a posteriori error estimator has been developed for discontinuous Galerkin discretization of Poisson's equation. The goal is to investigate other ways to leverage the adjoint calculations and we show how the convergence of the forward problem can be improved by adapting the grid using adjoint-based error estimates. Error estimation is usually conducted with continuous adjoints but if discrete adjoints are available it may be possible to reuse the discrete version for error estimation. We investigate the advantages and disadvantages of continuous and discre

  18. SMART wind turbine rotor. Design and field test

    SciTech Connect (OSTI)

    Berg, Jonathan Charles; Resor, Brian Ray; Paquette, Joshua A.; White, Jonathan Randall

    2014-01-01

    The Wind Energy Technologies department at Sandia National Laboratories has developed and field tested a wind turbine rotor with integrated trailing-edge flaps designed for active control of rotor aerodynamics. The SMART Rotor project was funded by the Wind and Water Power Technologies Office of the U.S. Department of Energy (DOE) and was conducted to demonstrate active rotor control and evaluate simulation tools available for active control research. This report documents the design, fabrication, and testing of the SMART Rotor. This report begins with an overview of active control research at Sandia and the objectives of this project. The SMART blade, based on the DOE / SNL 9-meter CX-100 blade design, is then documented including all modifications necessary to integrate the trailing edge flaps, sensors incorporated into the system, and the fabrication processes that were utilized. Finally the test site and test campaign are described.

  19. NREL: Wind Research - Regional Test Centers

    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 lightGeospatialDevelopment of Marine andDrivetrainsNew WindDesign

  20. NREL: Wind Research - Structural Testing Laboratory

    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 lightGeospatialDevelopment of Marine andDrivetrainsNewSite WindSmall

  1. Wind Testing and Certification | Department of 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 AdministrationRobust,Field-effectWorking WithTelecentricNCubicthe FOIA?ResourceMeasurementWind Program

  2. Aerodynamic testing of a rotating wind turbine blade

    SciTech Connect (OSTI)

    Butterfield, C.P.; Nelsen, E.N.

    1990-01-01

    Aerodynamic, load, flow-visualization, and inflow measurements were taken on a downwind horizontal-axis wind turbine (HAWT). A video camera mounted on the rotor recorded video images of tufts attached to the low-pressure side of the blade. Strain gages, mounted every 10% of the blade's span, provided load and pressure measurements. Pressure taps at 32 chordwise positions recorded pressure distributions. Wind inflow was measured via a vertical-plane array of anemometers located 10 m upwind. The objectives of the test were to address whether airfoil pressure distributions measured on a rotating blade differed from those measured in the wind tunnel, if radial flow near or in the boundary layer of the airfoil affected pressure distributions, if dynamic stall could result in increased dynamic loads, and if the location of the separation boundary measured on the rotating blade agreed with that measured in two-dimensional flow in the wind tunnel. 6 refs., 9 figs., 1 tab.

  3. Performance Testing of a Small Vertical-Axis Wind Turbine , S. Tullis2

    E-Print Network [OSTI]

    Tullis, Stephen

    Performance Testing of a Small Vertical-Axis Wind Turbine R. Bravo1 , S. Tullis2 , S. Ziada3 of electric production [1]. Although most performance testing for small-scale wind turbines is conducted vertical-axis wind turbines (VAWT) in urban settings, full-scale wind tunnel testing of a prototype 3.5 k

  4. Optimizing Cluster Heads for Energy Efficiency in Large-Scale...

    Office of Scientific and Technical Information (OSTI)

    Optimizing Cluster Heads for Energy Efficiency in Large-Scale Heterogeneous Wireless Sensor Networks Gu, Yi; Wu, Qishi; Rao, Nageswara S. V. Hindawi Publishing Corporation None...

  5. Energy Department Applauds Nation's First Large-Scale Industrial...

    Office of Environmental Management (EM)

    Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction The 15,000 square-foot sustainably designed National Sequestration Education Center, located at Richland...

  6. Optimizing Cluster Heads for Energy Efficiency in Large-Scale...

    Office of Scientific and Technical Information (OSTI)

    clustering is generally considered as an efficient and scalable way to facilitate the management and operation of such large-scale networks and minimize the total energy...

  7. ORNL demonstrates first large-scale graphene fabrication | ornl...

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

    ORNL demonstrates first large-scale graphene composite fabrication ORNL's ultrastrong graphene features layers of graphene and polymers and is an effective conductor of...

  8. A Model for Turbulent Combustion Simulation of Large Scale Hydrogen...

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

    A Model for Turbulent Combustion Simulation of Large Scale Hydrogen Explosions Event Sponsor: Argonne Leadership Computing Facility Seminar Start Date: Oct 6 2015 - 10:00am...

  9. Energy Department Applauds Nation's First Large-Scale Industrial...

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

    today's groundbreaking for construction of the nation's first large-scale industrial carbon capture and storage (ICCS) facility in Decatur, Illinois. Supported by the 2009...

  10. Effects of Volcanism, Crustal Thickness, and Large Scale Faulting...

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

    Effects of Volcanism, Crustal Thickness, and Large Scale Faulting on the Development and Evolution of Geothermal Systems: Collaborative Project in Chile Effects of Volcanism,...

  11. Large Scale GSHP as Alternative Energy for American Farmers Geothermal...

    Open Energy Info (EERE)

    technologies, and remove the farming business risk associated with fluctuating fuel prices. PI Xu has many years experience in large scale GSHP for commercial and industrial...

  12. Optimization Online - A fictitious play approach to large-scale ...

    E-Print Network [OSTI]

    Theodore Lambert

    2004-08-01

    Aug 1, 2004 ... A fictitious play approach to large-scale optimization. Theodore Lambert (tlambert ***at*** tmcc.edu) Marina A. Epelman (mepelman ***at*** ...

  13. Advancing Cellulosic Ethanol for Large Scale Sustainable Transportation

    E-Print Network [OSTI]

    Wyman, C

    2007-01-01

    Advancing Cellulosic Ethanol for Large Scale SustainableHydrogen Batteries Nuclear By Lee Lynd, Dartmouth Ethanol •Ethanol, ethyl alcohol, fermentation ethanol, or just “

  14. Towards a Large-Scale Recording System: Demonstration of Polymer...

    Office of Scientific and Technical Information (OSTI)

    Towards a Large-Scale Recording System: Demonstration of Polymer-Based Penetrating Array for Chronic Neural Recording Citation Details In-Document Search Title: Towards a...

  15. 2011 Wind Technologies Market Report

    E-Print Network [OSTI]

    Bolinger, Mark

    2013-01-01

    AWEA’s Wind Energy Weekly, DOE/EPRI’s Turbine Verification10% Wind Energy Penetration New large-scale 8 wind turbines100 wind turbine installed at the National Renewable Energy

  16. Field Testing: Independent, Accredited Testing and Validation for the Wind Industry (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-11-01

    This fact sheet describes the field testing capabilities at the National Wind Technology Center (NWTC). NREL's specialized facilities and personnel at the NWTC provide the U.S. wind industry with scientific and engineering support that has proven critical to the development of wind energy for U.S. energy needs. The NWTC's specialized field-testing capabilities have evolved over 30 years of continuous support by the U.S. Department of Energy Wind and Hydropower Technologies Program and long standing industry partnerships. The NWTC provides wind industry manufacturers, developers, and operators with turbine and component testing all in one convenient location. Although industry utilizes sophisticated modeling tools to design and optimize turbine configurations, there are always limitations in modeling capabilities, and testing is a necessity to ensure performance and reliability. Designs require validation and testing is the only way to determine if there are flaws. Prototype testing is especially important in capturing manufacturing flaws that might require fleet-wide retrofits. The NWTC works with its industry partners to verify the performance and reliability of wind turbines that range in size from 400 Watts to 3 megawatts. Engineers conduct tests on components and full-scale turbines in laboratory environments and in the field. Test data produced from these tests can be used to validate turbine design codes and simulations that further advance turbine designs.

  17. Dual-axis resonance testing of wind turbine blades

    DOE Patents [OSTI]

    Hughes, Scott; Musial, Walter; White, Darris

    2014-01-07

    An apparatus (100) for fatigue testing test articles (104) including wind turbine blades. The apparatus (100) includes a test stand (110) that rigidly supports an end (106) of the test article (104). An actuator assembly (120) is attached to the test article (104) and is adapted for substantially concurrently imparting first and second forcing functions in first and second directions on the test article (104), with the first and second directions being perpendicular to a longitudinal axis. A controller (130) transmits first and second sets of displacement signals (160, 164) to the actuator assembly (120) at two resonant frequencies of the test system (104). The displacement signals (160, 164) initiate the actuator assembly (120) to impart the forcing loads to concurrently oscillate the test article (104) in the first and second directions. With turbine blades, the blades (104) are resonant tested concurrently for fatigue in the flapwise and edgewise directions.

  18. Wind Technology Testing Center Acquires New Blade Fatigue Test System |

    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:Financing ToolInternationalReport FY2014 -Energy Costs by IncreasingWholeWindAward |2Department of

  19. Language Requirements for Large-Scale Generic Libraries

    E-Print Network [OSTI]

    Lumsdaine, Andrew

    Language Requirements for Large-Scale Generic Libraries Jeremy Siek and Andrew Lumsdaine {jsiek-scale software libraries. The fundamental principle of generic pro- gramming is the realization of interfaces programming and large-scale libraries. In this paper, we present an overview of G and analyze

  20. Climate impacts of a large-scale biofuels expansion*

    E-Print Network [OSTI]

    Climate impacts of a large-scale biofuels expansion* Willow Hallgren, C. Adam Schlosser, Erwan impacts of a large-scale biofuels expansion Willow Hallgren,1 C. Adam Schlosser,1 Erwan Monier,1 David March 2013. [1] A global biofuels program will potentially lead to intense pressures on land supply

  1. Large-Scale Eucalyptus Energy Farms and Power Cogeneration1

    E-Print Network [OSTI]

    Large-Scale Eucalyptus Energy Farms and Power Cogeneration1 Robert C. Noronla2 The initiation of a large-scale cogeneration project, especially one that combines construction of the power generation supplemental fuel source must be sought if the cogeneration facility will consume more fuel than

  2. Detection and Classification of Ash Dieback on Large-Scale

    E-Print Network [OSTI]

    Detection and Classification of Ash Dieback on Large-Scale Color Aerial Photographs Ralph J of Agriculture 1966 #12;Croxton, Ralph J. 1966. Detection and classification of ash dieback on large- scale. Forest Serv. Res. Paper PSW-35) Aerial color photographs were taken at two scales over ash stands in New

  3. Markov Chain Analysis for Large-Scale Grid Systems

    E-Print Network [OSTI]

    Markov Chain Analysis for Large-Scale Grid Systems Christopher Dabrowski Fern Hunt NISTIR 7566 #12;2 #12;3 NISTIR 7566 Markov Chain Analysis for Large-Scale Grid Systems Christopher Dabrowski Software and Systems Division Information Technology Laboratory National Institute of Standards and Technology

  4. Wind turbine blade testing system using base excitation

    DOE Patents [OSTI]

    Cotrell, Jason; Thresher, Robert; Lambert, Scott; Hughes, Scott; Johnson, Jay

    2014-03-25

    An apparatus (500) for fatigue testing elongate test articles (404) including wind turbine blades through forced or resonant excitation of the base (406) of the test articles (404). The apparatus (500) includes a testing platform or foundation (402). A blade support (410) is provided for retaining or supporting a base (406) of an elongate test article (404), and the blade support (410) is pivotally mounted on the testing platform (402) with at least two degrees of freedom of motion relative to the testing platform (402). An excitation input assembly (540) is interconnected with the blade support (410) and includes first and second actuators (444, 446, 541) that act to concurrently apply forces or loads to the blade support (410). The actuator forces are cyclically applied in first and second transverse directions. The test article (404) responds to shaking of its base (406) by oscillating in two, transverse directions (505, 507).

  5. Development of an integrated in-situ remediation technology. Topical report for task No. 12 and 13 entitled: Large scale field test of the Lasagna{trademark} process, September 26, 1994--May 25, 1996

    SciTech Connect (OSTI)

    Athmer, C.J.; Ho, Sa V.; Hughes, B.M. [and others

    1997-04-01

    Contamination in low permeability soils poses a significant technical challenge to in-situ remediation efforts. Poor accessibility to the contaminants and difficulty in delivery of treatment reagents have rendered existing in-situ treatments such as bioremediation, vapor extraction, pump and treat rather ineffective when applied to low permeability soils present at many contaminated sites. This technology is an integrated in-situ treatment in which established geotechnical methods are used to instant degradation zones directly in the contaminated soil and electroosmosis is utilized to move the contaminants back and forth through those zones until the treatment is completed. This topical report summarizes the results of the field experiment conducted at the Paducah Gaseous Diffusion Plant in Paducah, KY. The test site covered 15 feet wide by 10 feet across and 15 feet deep with steel panels as electrodes and wickdrains containing granular activated carbon as treatment zone& The electrodes and treatment zones were installed utilizing innovative adaptation of existing emplacement technologies. The unit was operated for four months, flushing TCE by electroosmosis from the soil into the treatment zones where it was trapped by the activated carbon. The scale up from laboratory units to this field scale was very successful with respect to electrical parameters as weft as electroosmotic flow. Soil samples taken throughout the site before and after the test showed over 98% TCE removal, with most samples showing greater than 99% removal.

  6. Advanced Control Design for Wind Turbines; Part I: Control Design, Implementation, and Initial Tests

    SciTech Connect (OSTI)

    Wright, A. D.; Fingersh, L. J.

    2008-03-01

    The purpose of this report is to give wind turbine engineers information and examples of the design, testing through simulation, field implementation, and field testing of advanced wind turbine controls.

  7. Stabilization of Large Scale Structure by Adhesive Gravitational Clustering

    E-Print Network [OSTI]

    Thomas Buchert

    1999-08-13

    The interplay between gravitational and dispersive forces in a multi-streamed medium leads to an effect which is exposed in the present note as the genuine driving force of stabilization of large-scale structure. The conception of `adhesive gravitational clustering' is advanced to interlock the fairly well-understood epoch of formation of large-scale structure and the onset of virialization into objects that are dynamically in equilibrium with their large-scale structure environment. The classical `adhesion model' is opposed to a class of more general models traced from the physical origin of adhesion in kinetic theory.

  8. Ris-R-Report Verification test for three WindCubeTM

    E-Print Network [OSTI]

    sensors mounted at a meteorological mast. Results are presented for three tested units ­ in detail the evaluation of measured mean wind speeds, wind directions and wind speed standard deviations. The data.6 Specifications of reference sensors 10 2.7 Time synchronization 10 3 Procedure of testing (verification test

  9. Testing Small Wind Turbine Generators: Design of a Driving Dynamometer Stephen Rehmeyer Pepe

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Testing Small Wind Turbine Generators: Design of a Driving Dynamometer by Stephen Rehmeyer Pepe Sc, Berkeley Spring 2007 #12;Testing Small Wind Turbine Generators: Design of a Driving Dynamometer Copyright c 2007 by Stephen Rehmeyer Pepe #12;Abstract Testing Small Wind Turbine Generators: Design of a Driving

  10. How Three Retail Buyers Source Large-Scale Solar Electricity

    Broader source: Energy.gov [DOE]

    Large-scale, non-utility solar power purchase agreements (PPAs) are still a rarity despite the growing popularity of PPAs across the country. In this webinar, participants will learn more about how...

  11. LARGE-SCALE CORONAL PROPAGATING FRONTS IN SOLAR ERUPTIONS AS...

    Office of Scientific and Technical Information (OSTI)

    LARGE-SCALE CORONAL PROPAGATING FRONTS IN SOLAR ERUPTIONS AS OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY-AN ENSEMBLE STUDY Re-direct...

  12. Surrogate modeling for large-scale black-box systems

    E-Print Network [OSTI]

    Liem, Rhea Patricia

    2007-01-01

    This research introduces a systematic method to reduce the complexity of large-scale blackbox systems for which the governing equations are unavailable. For such systems, surrogate models are critical for many applications, ...

  13. Exploration of large scale manufacturing of polydimethylsiloxane (PDMS) microfluidic devices

    E-Print Network [OSTI]

    Hum, Philip W. (Philip Wing-Jung)

    2006-01-01

    Discussion of the current manufacturing process of polydimethylsiloxane (PDMS) parts and the emergence of PDMS use in biomedical microfluidic devices addresses the need to develop large scale manufacturing processes for ...

  14. Large Scale Computing and Storage Requirements for High Energy Physics

    E-Print Network [OSTI]

    Gerber, Richard A.

    2011-01-01

    Journal of Computational Physics, Large Scale Computing andRequirements for High Energy Physics [3] A. S. Almgren, J.Journal of Computational Physics, 87:171–200, 1990. [7] G.

  15. Platforms and real options in large-scale engineering systems

    E-Print Network [OSTI]

    Kalligeros, Konstantinos C., 1976-

    2006-01-01

    This thesis introduces a framework and two methodologies that enable engineering management teams to assess the value of real options in programs of large-scale, partially standardized systems implemented a few times over ...

  16. The Promise Of Data Grouping In Large Scale Storage Systems

    E-Print Network [OSTI]

    Wildani, Avani

    2013-01-01

    Martin. Why traditional storage systems donâ??t help us saveB. Dufrasne et al. IBM XIV Storage System Gen3 Architecture,in large scale storage systems. In Proceedings of the 11th

  17. Interference management techniques in large-scale wireless networks 

    E-Print Network [OSTI]

    Luo, Yi

    2015-06-29

    In this thesis, advanced interference management techniques are designed and evaluated for large-scale wireless networks with realistic assumptions, such as signal propagation loss, random node distribution and ...

  18. Data mining techniques for large-scale gene expression analysis

    E-Print Network [OSTI]

    Palmer, Nathan Patrick

    2011-01-01

    Modern computational biology is awash in large-scale data mining problems. Several high-throughput technologies have been developed that enable us, with relative ease and little expense, to evaluate the coordinated expression ...

  19. Fast Solver for Large Scale Eddy Current Non-Destructive Evaluation Problems

    E-Print Network [OSTI]

    Fast Solver for Large Scale Eddy Current Non-Destructive Evaluation Problems Naiguang Lei Advisor: Lalita Udpa Thursday, July 31st, 2014 9:00-11:00am, EB2219 Abstract Eddy current testing plays a very, an alternating magnetic field source generates induced currents, called eddy currents, in an electrically

  20. 2009 ASME WIND ENERGY SYMPOSIUM Static and Fatigue Testing of Thick Adhesive Joints for

    E-Print Network [OSTI]

    1 2009 ASME WIND ENERGY SYMPOSIUM Static and Fatigue Testing of Thick Adhesive Joints for Wind as wind blade size has increased. Typical blade joints use paste adhesives several millimeters thick aircraft, which are also of relevance to wind blades in many instances. The strengths of lap-shear and many

  1. Testing coupled dark energy with large scale structure observation

    SciTech Connect (OSTI)

    Yang, Weiqiang; Xu, Lixin, E-mail: d11102004@mail.dlut.edu.cn, E-mail: lxxu@dlut.edu.cn [Institute of Theoretical Physics, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024 (China)

    2014-08-01

    The coupling between the dark components provides a new approach to mitigate the coincidence problem of cosmological standard model. In this paper, dark energy is treated as a fluid with a constant equation of state, whose coupling with dark matter is Q-bar =3H?{sub x}?-bar {sub x}. In the frame of dark energy, we derive the evolution equations for the density and velocity perturbations. According to the Markov Chain Monte Carlo method, we constrain the model by currently available cosmic observations which include cosmic microwave background radiation, baryon acoustic oscillation, type Ia supernovae, and f?{sub 8}(z) data points from redshift-space distortion. The results show the interaction rate in ? regions: ?{sub x} = 0.00328{sub -0.00328-0.00328-0.00328}{sup +0.000736+0.00549+0.00816}, which means that the recently cosmic observations favor a small interaction rate which is up to the order of 10{sup -2}, meanwhile, the measurement of redshift-space distortion could rule out the large interaction rate in the ? region.

  2. Large-Scale Industrial CCS Projects Selected for Continued Testing |

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties - WAPA PublicLED ADOPTION REPORTLand and Facility Use Policy2014)

  3. Expanding Small Wind Turbine Certification Testing - Establishment of Regional Test Centers (Poster)

    SciTech Connect (OSTI)

    Jimenez, A.; Bowen, A.; Forsyth, T.; Huskey, A.; Sinclair, K.; van Dam, J.; Smith, J.

    2010-05-01

    Presented at the WINDPOWER 2010 Conference & Exhibition, 23-26 May 2010, Dallas, Texas. The rapid growth of the small wind turbine (SWT) market is attracting numerous entrants. Small wind turbine purchasers now have many options but often lack information (such as third-party certification) to select a quality turbine. Most SWTs do not have third-party certification due to the expense and difficulty of the certification process. Until recently, the only SWT certification bodies were in Europe. In North America, testing has been limited to U.S. Department of Energy (DOE) subsidized tests conducted at the National Wind Technology Center (NWTC) under the ongoing Independent Testing Project. The goal is to increase the number of certified turbines and gain greater consumer confidence in SWT technology. To reduce certification testing costs, DOE/NREL is assisting in establishing a network of Regional Test Centers (RTCs) to conduct SWT third-party certification testing. To jump-start these RTCs, DOE/NREL is providing financial and technical assistance for an initial round of tests. The goal is to establish a lower-cost U.S. small wind testing capability that will lead to increased SWT certification. This poster describes the project, describes how it fits within broader SWT certification activities, and provides current status.

  4. ANALYSIS OF TURBULENT MIXING JETS IN LARGE SCALE TANK

    SciTech Connect (OSTI)

    Lee, S; Richard Dimenna, R; Robert Leishear, R; David Stefanko, D

    2007-03-28

    Flow evolution models were developed to evaluate the performance of the new advanced design mixer pump for sludge mixing and removal operations with high-velocity liquid jets in one of the large-scale Savannah River Site waste tanks, Tank 18. This paper describes the computational model, the flow measurements used to provide validation data in the region far from the jet nozzle, the extension of the computational results to real tank conditions through the use of existing sludge suspension data, and finally, the sludge removal results from actual Tank 18 operations. A computational fluid dynamics approach was used to simulate the sludge removal operations. The models employed a three-dimensional representation of the tank with a two-equation turbulence model. Both the computational approach and the models were validated with onsite test data reported here and literature data. The model was then extended to actual conditions in Tank 18 through a velocity criterion to predict the ability of the new pump design to suspend settled sludge. A qualitative comparison with sludge removal operations in Tank 18 showed a reasonably good comparison with final results subject to significant uncertainties in actual sludge properties.

  5. Development and testing of improved statistical wind power forecasting methods.

    SciTech Connect (OSTI)

    Mendes, J.; Bessa, R.J.; Keko, H.; Sumaili, J.; Miranda, V.; Ferreira, C.; Gama, J.; Botterud, A.; Zhou, Z.; Wang, J. (Decision and Information Sciences); (INESC Porto)

    2011-12-06

    Wind power forecasting (WPF) provides important inputs to power system operators and electricity market participants. It is therefore not surprising that WPF has attracted increasing interest within the electric power industry. In this report, we document our research on improving statistical WPF algorithms for point, uncertainty, and ramp forecasting. Below, we provide a brief introduction to the research presented in the following chapters. For a detailed overview of the state-of-the-art in wind power forecasting, we refer to [1]. Our related work on the application of WPF in operational decisions is documented in [2]. Point forecasts of wind power are highly dependent on the training criteria used in the statistical algorithms that are used to convert weather forecasts and observational data to a power forecast. In Chapter 2, we explore the application of information theoretic learning (ITL) as opposed to the classical minimum square error (MSE) criterion for point forecasting. In contrast to the MSE criterion, ITL criteria do not assume a Gaussian distribution of the forecasting errors. We investigate to what extent ITL criteria yield better results. In addition, we analyze time-adaptive training algorithms and how they enable WPF algorithms to cope with non-stationary data and, thus, to adapt to new situations without requiring additional offline training of the model. We test the new point forecasting algorithms on two wind farms located in the U.S. Midwest. Although there have been advancements in deterministic WPF, a single-valued forecast cannot provide information on the dispersion of observations around the predicted value. We argue that it is essential to generate, together with (or as an alternative to) point forecasts, a representation of the wind power uncertainty. Wind power uncertainty representation can take the form of probabilistic forecasts (e.g., probability density function, quantiles), risk indices (e.g., prediction risk index) or scenarios (with spatial and/or temporal dependence). Statistical approaches to uncertainty forecasting basically consist of estimating the uncertainty based on observed forecasting errors. Quantile regression (QR) is currently a commonly used approach in uncertainty forecasting. In Chapter 3, we propose new statistical approaches to the uncertainty estimation problem by employing kernel density forecast (KDF) methods. We use two estimators in both offline and time-adaptive modes, namely, the Nadaraya-Watson (NW) and Quantilecopula (QC) estimators. We conduct detailed tests of the new approaches using QR as a benchmark. One of the major issues in wind power generation are sudden and large changes of wind power output over a short period of time, namely ramping events. In Chapter 4, we perform a comparative study of existing definitions and methodologies for ramp forecasting. We also introduce a new probabilistic method for ramp event detection. The method starts with a stochastic algorithm that generates wind power scenarios, which are passed through a high-pass filter for ramp detection and estimation of the likelihood of ramp events to happen. The report is organized as follows: Chapter 2 presents the results of the application of ITL training criteria to deterministic WPF; Chapter 3 reports the study on probabilistic WPF, including new contributions to wind power uncertainty forecasting; Chapter 4 presents a new method to predict and visualize ramp events, comparing it with state-of-the-art methodologies; Chapter 5 briefly summarizes the main findings and contributions of this report.

  6. Test evaluation of a laminated wood wind turbine blade concept

    SciTech Connect (OSTI)

    Faddoul, J.R.

    1981-05-01

    Because of the high stiffness and fatigue strength of wood (as compared to density) along with the low cost manufacturing techniques available, a laminated wood wind turbine blade application has been studied. This report presents the results of the testing performed on elements of the wood blade-to-hub transition section which uses steel studs cast into a laminated wood spar with a filled epoxy. Individual stud samples were tested for both ultimate load carrying capability and fatigue strength. A one-time pull-out load of 78,000 lb was achieved for a 15 in. long stud with a diameter of 1 in. Tension-tension fatigue indicated that peak loads on the order of 40% of ultimate could be maintained as an endurance limit (mean load = 20,000 lb, cyclic load = +-15,000 lb). Following the individual stud testing, a full-scale inboard blade section (20 ft in length) was tested.

  7. 2009 Wind Technologies Market Report

    E-Print Network [OSTI]

    Wiser, Ryan

    2010-01-01

    al. 2010. Large-scale Offshore Wind for the United States:examined land-based and offshore wind energy in the Easternassistance with the offshore wind energy discussion; Donna

  8. 2009 Wind Technologies Market Report

    E-Print Network [OSTI]

    Wiser, Ryan

    2010-01-01

    al. 2010. Large-scale Offshore Wind for the United States:assistance with the offshore wind energy discussion; DonnaTechnologies Market Report Offshore Wind Power Project and

  9. 2009 Wind Technologies Market Report

    E-Print Network [OSTI]

    Wiser, Ryan

    2010-01-01

    AWEA). 2010b. AWEA Small Wind Turbine Global Market Survey,html David, A. 2009. Wind Turbines: Industry and Tradewhich new large-scale wind turbines were installed in 2009 (

  10. 2009 Wind Technologies Market Report

    E-Print Network [OSTI]

    Wiser, Ryan

    2010-01-01

    AWEA’s Wind Energy Weekly, DOE/EPRI’s Turbine Verification10% Wind Energy Penetration New large-scale 10 wind turbineswind energy became more challenging, orders for new turbines

  11. OPERATIONAL TEST OF SONIC WIND SENSORS AT KNMI Wiel M.F. Wauben

    E-Print Network [OSTI]

    Wauben, Wiel

    by 2D sonic wind sensors on account of cost reduction. As a first step of this implementation of sonic1 OPERATIONAL TEST OF SONIC WIND SENSORS AT KNMI Wiel M.F. Wauben 1 and Rob van Krimpen 2 1 R a laboratory en field test of three commercial 2D sonic wind sensors in 2003. Based on the results

  12. Wind Tunnel and Field Test of Three 2D Sonic Anemometers

    E-Print Network [OSTI]

    Wauben, Wiel

    Wind Tunnel and Field Test of Three 2D Sonic Anemometers Wiel Wauben R&D Information and Observation Technology, KNMI September 17, 2007 #12;#12;Wind Tunnel and Field Test of Three 2D Sonic.....................................................................................................1 2. Wind sensors

  13. EINSTEIN'S SIGNATURE IN COSMOLOGICAL LARGE-SCALE STRUCTURE

    SciTech Connect (OSTI)

    Bruni, Marco; Hidalgo, Juan Carlos; Wands, David

    2014-10-10

    We show how the nonlinearity of general relativity generates a characteristic nonGaussian signal in cosmological large-scale structure that we calculate at all perturbative orders in a large-scale limit. Newtonian gravity and general relativity provide complementary theoretical frameworks for modeling large-scale structure in ?CDM cosmology; a relativistic approach is essential to determine initial conditions, which can then be used in Newtonian simulations studying the nonlinear evolution of the matter density. Most inflationary models in the very early universe predict an almost Gaussian distribution for the primordial metric perturbation, ?. However, we argue that it is the Ricci curvature of comoving-orthogonal spatial hypersurfaces, R, that drives structure formation at large scales. We show how the nonlinear relation between the spatial curvature, R, and the metric perturbation, ?, translates into a specific nonGaussian contribution to the initial comoving matter density that we calculate for the simple case of an initially Gaussian ?. Our analysis shows the nonlinear signature of Einstein's gravity in large-scale structure.

  14. Quiz: Test Your Wind Energy IQ | Department of Energy

    Energy Savers [EERE]

    wind capacity in the U.S. is nearing 1 gigawatt. | Energy Department photo. 13. How many offshore wind farms are there in the U.S.? 5 2 12 0 The Energy Department's Wind Program...

  15. The new Wind Technology Test Center is the only facility in the nation capable of testing wind turbine blades up to

    E-Print Network [OSTI]

    turbine blades up to 90 meters in length. A critical factor to wind turbine design and development is the ability to test new designs, components, and materials. In addition, wind turbine blade manufacturers are required to test their blades as part of the turbine certification process. The National Renewable Energy

  16. Wind Tunnel Tests of Parabolic Trough Solar Collectors: March 2001--August 2003

    SciTech Connect (OSTI)

    Hosoya, N.; Peterka, J. A.; Gee, R. C.; Kearney, D.

    2008-05-01

    Conducted extensive wind-tunnel tests on parabolic trough solar collectors to determine practical wind loads applicable to structural design for stress and deformation, and local component design for concentrator reflectors.

  17. Testing Small Wind Turbines at the National Renewable Energy Laboratory (NREL) (Poster)

    SciTech Connect (OSTI)

    Sinclair, K.; Bowen, A.

    2008-06-01

    WindPower 2008 conference sponsored by AWEA held in Houston, Texas on June 1-4, 2008. This poster describes four small wind electric systems that were tested to IEC and AWEA standards at NREL's NWTC.

  18. FAST Code Verification of Scaling Laws for DeepCwind Floating Wind System Tests: Preprint

    SciTech Connect (OSTI)

    Jain, A.; Robertson, A. N.; Jonkman, J. M.; Goupee, A. J.; Kimball, R. W.; Swift, A. H. P.

    2012-04-01

    This paper investigates scaling laws that were adopted for the DeepCwind project for testing three different floating wind systems at 1/50 scale in a wave tank under combined wind and wave loading.

  19. 2014 WIND POWER PROGRAM PEER REVIEW-TEST FACILITIES

    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:Financing ToolInternationalReportOffice | Department ofDistributed Wind March 24-27,ResourceTest

  20. Line formation in the inner winds of classical T Tauri stars: testing the conical wind solution

    E-Print Network [OSTI]

    Kurosawa, Ryuichi

    2012-01-01

    We present the emission line profile models of hydrogen and helium based on the results from axisymmetric magnetohydrodynamics (MHD) simulations of the wind formed near the disk-magnetosphere boundary of classical T Tauri stars (CTTSs). We extend the previous outflow models of `the conical wind' by Romanova et al. to include a well defined magnetospheric accretion funnel flow which is essential for modelling the optical and near-infrared hydrogen and helium lines of CTTSs. Our MHD model shows outflows in conical shape with a half opening angle about 35 degrees. The flow properties such as the maximum outflow speed in the conical wind, maximum inflow speed in the accretion funnel, mass-accretion and mass-loss rates are comparable to those found in a typical CTTS. The density, velocity and temperature from the MHD simulations are used in a separate radiative transfer model to predict the line profiles and test the consistency of the MHD models with observations. The line profiles are computed with various combi...

  1. Upcoming Funding Opportunity to Develop and Field Test Wind Energy...

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

    and operating wind energy facilities in locations with sensitive bat species. As wind energy continues to grow as a renewable source of energy for communities throughout...

  2. Large Scale Cosmic Microwave Background Anisotropies and Dark Energy

    E-Print Network [OSTI]

    J. Weller; A. M. Lewis

    2003-08-29

    In this note we investigate the effects of perturbations in a dark energy component with a constant equation of state on large scale cosmic microwave background anisotropies. The inclusion of perturbations increases the large scale power. We investigate more speculative dark energy models with w<-1 and find the opposite behaviour. Overall the inclusion of perturbations in the dark energy component increases the degeneracies. We generalise the parameterization of the dark energy fluctuations to allow for an arbitrary const ant sound speeds and show how constraints from cosmic microwave background experiments change if this is included. Combining cosmic microwave background with large scale structure, Hubble parameter and Supernovae observations we obtain w=-1.02+-0.16 (1 sigma) as a constraint on the equation of state, which is almost independent of the sound speed chosen. With the presented analysis we find no significant constraint on the constant speed of sound of the dark energy component.

  3. Manufactured Home Testing in Simulated and Naturally Occurring High Winds

    SciTech Connect (OSTI)

    W. D. Richins; T. K. Larson

    2006-08-01

    A typical double-wide manufactured home was tested in simulated and naturally occurring high winds to understand structural behavior and improve performance during severe windstorms. Seven (7) lateral load tests were conducted on a double-wide manufactured home at a remote field test site in Wyoming. An extensive instrumentation package monitored the overall behavior of the home and collected data vital to validating computational software for the manufactured housing industry. The tests were designed to approach the design load of the home without causing structural damage, thus allowing the behavior of the home to be accessed when the home was later exposed to high winds (to 80-mph). The data generally show near-linear initial system response with significant non-linear behavior as the applied loads increase. Load transfer across the marriage line is primarily compression. Racking, while present, is very small. Interface slip and shear displacement along the marriage line are nearly insignificant. Horizontal global displacements reached 0.6 inch. These tests were designed primarily to collect data necessary to calibrate a desktop analysis and design software tool, MHTool, under development at the Idaho National Laboratory specifically for manufactured housing. Currently available analysis tools are, for the most part, based on methods developed for “stick built” structures and are inappropriate for manufactured homes. The special materials utilized in manufactured homes, such as rigid adhesives used in the connection of the sheathing materials to the studs, significantly alter the behavior of manufactured homes under lateral loads. Previous full scale tests of laterally loaded manufactured homes confirm the contention that conventional analysis methods are not applicable. System behavior dominates the structural action of manufactured homes and its prediction requires a three dimensional analysis of the complete unit, including tiedowns. This project was sponsored by the US Department of Energy, US Department of Housing and Urban Development, and the Manufactured Housing Institute. The results of this research can lead to savings in annual losses of life and property by providing validated information to enable the advancement of code requirements and by developing engineering software that can predict and optimize wind resistance.

  4. Aeroacoustic Testing of Wind Turbine Airfoils: February 20, 2004 - February 19, 2008

    SciTech Connect (OSTI)

    Devenport, W.; Burdisso, R. A.; Camargo, H.; Crede, E.; Remillieux, M.; Rasnick, M.; Van Seeters, P.

    2010-05-01

    The U.S. Department of Energy (DOE), working through its National Renewable Energy Laboratory (NREL), is engaged in a comprehensive research effort to improve the understanding of wind turbine aeroacoustics. The motivation for this effort is the desire to exploit the large expanse of low wind speed sites that tend to be close to U.S. load centers. Quiet wind turbines are an inducement to widespread deployment, so the goal of NREL's aeroacoustic research is to develop tools that the U.S. wind industry can use in developing and deploying highly efficient, quiet wind turbines at low wind speed sites. NREL's National Wind Technology Center (NWTC) is implementing a multifaceted approach that includes wind tunnel tests, field tests, and theoretical analyses in direct support of low wind speed turbine development by its industry partners. NWTC researchers are working hand in hand with engineers in industry to ensure that research findings are available to support ongoing design decisions.

  5. Harmonic influence in large-scale networks Daron Acemoglu

    E-Print Network [OSTI]

    Como, Giacomo

    Harmonic influence in large-scale networks Daron Acemoglu , Giacomo Como , Fabio Fagnani , and Asuman Ozdaglar§ 1. INTRODUCTION Harmonic influence has been recently introduced as a measure = 0 and xs1 = 1, respectively, the harmonic influence vector x measures the relative influence of s1

  6. A Reconfigurable Fabric for Accelerating Large-Scale Datacenter Services

    E-Print Network [OSTI]

    Hauck, Scott

    A Reconfigurable Fabric for Accelerating Large-Scale Datacenter Services Andrew Putnam, Adrian M, Doug Burger Abstract To advance datacenter capabilities beyond what commodity server designs can,632 servers and FPGAs in a production datacenter and successfully used to accelerate the ranking portion

  7. Materials Availability Expands the Opportunity for Large-Scale

    E-Print Network [OSTI]

    Kammen, Daniel M.

    , 2009. Accepted January 22, 2009. Solar photovoltaics have great promise for a low-carbon future­3). Solar photovoltaics (PV) are frequently cited as a promising but an economically unre- alistic largeMaterials Availability Expands the Opportunity for Large-Scale Photovoltaics Deployment C Y R U S W

  8. Evolving Large Scale UAV Communication System Adrian Agogino

    E-Print Network [OSTI]

    Tumer, Kagan

    Evolving Large Scale UAV Communication System Adrian Agogino UCSC at NASA Ames Mail Stop 269 Corvallis, OR 97331 Kagan.Tumer@ oregonstate.edu ABSTRACT Unmanned Aerial Vehicles (UAVs) have traditionally powered unmanned aerial vehicles (UAVs) to fly long term missions at high altitudes. This will revo

  9. Characterizing Google Hacking: A First Large-Scale Quantitative Study

    E-Print Network [OSTI]

    Gu, Guofei

    Characterizing Google Hacking: A First Large-Scale Quantitative Study Jialong Zhang, Jayant Notani.com Abstract. Google Hacking continues to be abused by attackers to find vulnerable websites on current the characteristics of vulnerabilities targeted by Google Hacking (e.g., what kind of vulnerabilities are typically

  10. Optimal Transmission Radius for Flooding in Large Scale Sensor Networks

    E-Print Network [OSTI]

    Krishnamachari, Bhaskar

    1 Optimal Transmission Radius for Flooding in Large Scale Sensor Networks Marco Z´u~niga Z and bandwidth resources, the flooded packet may keep the transmission medium within the network busy for too long, reducing overall network throughput. We analyze the impact of the transmission radius

  11. Optimal Transmission Radius for Flooding in Large Scale Sensor Networks

    E-Print Network [OSTI]

    Krishnamachari, Bhaskar

    1 Optimal Transmission Radius for Flooding in Large Scale Sensor Networks Marco Z´u~niga Z. If the transmission radius is not set optimally, the flooded packet may be holding the transmission medium for longer periods than are necessary, reducing overall network throughput. We analyze the impact of the transmission

  12. IFIP/IEEE International Conference on Very Large Scale Integration

    E-Print Network [OSTI]

    Pierre, Laurence

    -Signal IC Design · 3-D Integration · Physical Design · SoC Design for Variability, Reliability, Fault22nd IFIP/IEEE International Conference on Very Large Scale Integration VLSI-SoC 2014 October 6-8, 2014 Playa del Carmen, Mexico Iberostar Tucán and Quetzal Hotel General Chairs: Arturo Sarmiento Reyes

  13. PERSPECTIVE SPECIAL SERIES IN LARGE-SCALE BIOLOGY

    E-Print Network [OSTI]

    Gent, Universiteit

    PERSPECTIVE SPECIAL SERIES IN LARGE-SCALE BIOLOGY PLAZA: a comparative genomics resource to study gene and genome evolution in plants Sebastian Proost1,2+ , Michiel Van Bel1,2+ , Lieven Sterck1: comparative genomics, evolution, colinearity, gene family, plants Running title: Comparative genomics

  14. Feasibility Study of Large Scale Photosynthetic Biohydrogen Greg Burgess1

    E-Print Network [OSTI]

    Feasibility Study of Large Scale Photosynthetic Biohydrogen Production Greg Burgess1 , Joel Freeman.Burgess@anu.edu.au, Javier.Fernandez@rsbs.anu.edu.au, Keith.Lovegrove@anu.edu.au A method of industrial production, the same as in some non-biological systems of H2 production. In normal conditions in algae and all plants

  15. Modeling emergent large-scale structures of barchan dune fields

    E-Print Network [OSTI]

    Claudin, Philippe

    Modeling emergent large-scale structures of barchan dune fields S. Worman , A.B. Murray , R, barchan dunes typically exist as members of larger fields that display strik- ing, enigmatic structures that cannot be readily explained by examining the dynamics at the scale of single dunes, or by appealing

  16. Hi-LION: Hierarchical Large-Scale Interconnection Optical Network

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    Hi-LION: Hierarchical Large-Scale Interconnection Optical Network With AWGRs [Invited] Zheng Cao, Roberto Proietti, and S. J. B. Yoo Abstract--This paper proposes Hi-LION, a hierarchical large wavelength routing property of AWGRs together with electrical switching inside the processors, Hi-LION can

  17. Large Scale Energy Storage: From Nanomaterials to Large Systems

    E-Print Network [OSTI]

    Fisher, Frank

    Large Scale Energy Storage: From Nanomaterials to Large Systems Wednesday October 26, 2011, Babbio energy storage devices. Specifically, this talk discusses 1) the challenges for grid scale of emergent technologies with ultralow costs on new energy storage materials and mechanisms. Dr. Jun Liu

  18. Large-scale Scene Understanding Challenge: Eye Tracking Saliency Estimation

    E-Print Network [OSTI]

    Xiao, Jianxiong

    Large-scale Scene Understanding Challenge: Eye Tracking Saliency Estimation Yinda Zhang, Fisher Yu of eye tracking saliency challenge is to generate a saliency map (Fig. 1(c)), which can predict map and unzip them in to a same folder, e.g. Root. The raw images are collected from SUN database [2

  19. Supplementary Material: Large Scale Read Classification for Next Generation Sequencing

    E-Print Network [OSTI]

    Liang, Huizhi "Elly"

    genomics. 1 Introduction This document provides a list of sequences used in the study Large Scale Read.3 Bordetella bronchiseptica RB50 chromosome, complete genome 2 Negative NC_009495.1 Clostridium botulinum A str. ATCC 3502 chromosome, complete genome 2 Negative NC_022121.1 Chlamydia trachomatis strain J/31

  20. Lessons from Large-Scale Renewable Energy Integration Studies: Preprint

    SciTech Connect (OSTI)

    Bird, L.; Milligan, M.

    2012-06-01

    In general, large-scale integration studies in Europe and the United States find that high penetrations of renewable generation are technically feasible with operational changes and increased access to transmission. This paper describes other key findings such as the need for fast markets, large balancing areas, system flexibility, and the use of advanced forecasting.

  1. Large-Scale Streamwise Turbulent Structures in Hypersonic Boundary Layers 

    E-Print Network [OSTI]

    English, Benjamin L.

    2013-04-22

    Prior research in the field of boundary layer turbulence has identified streamwise-elongated large-scale turbulence structures in both low speed compressible and high speed (M=2.0) flow. No experimental work has been done in any flow of M> or =3...

  2. Testing Small Wind Turbines at the National Renewable Energy Laboratory (NREL) (Poster)

    SciTech Connect (OSTI)

    Bowen, A.; Huskey, A.; Hur, J.; Jager, D.; van Dam, J.; Smith, J.

    2010-05-01

    Poster presented at the AWEA 2010 conference illustrates NREL's testing of five small wind turbines in the first round of its independent testing project. Tests include power performance, noise, duration, safety and function, and power quality (where applicable).

  3. Developing a Practical Wind Tunnel Test Engineering Course for Undergraduate Aerospace Engineering Students 

    E-Print Network [OSTI]

    Recla, Benjamin Jeremiah

    2013-04-19

    This thesis describes the development and assessment of an undergraduate wind tunnel test engineering course utilizing the 7ft by 10ft Oran W. Nicks Low Speed Wind Tunnel (LSWT). Only 5 other universities in the United States have a wind tunnel...

  4. Testing, Manufacturing, and Component Development Projects for Utility-Scale and Distributed Wind Energy, Fiscal Years 2006–2014

    SciTech Connect (OSTI)

    2014-04-01

    This report covers the Wind and Water Power Technologies Office's Testing, Manufacturing, and Component Development Projects for Utility-Scale and Distributed Wind Energy from 2006 to 2014.

  5. Test Cases for Wind Power Plant Dynamic Models on Real-Time Digital Simulator: Preprint

    SciTech Connect (OSTI)

    Singh, M.; Muljadi, E.; Gevorgian, V.

    2012-06-01

    The objective of this paper is to present test cases for wind turbine generator and wind power plant models commonly used during commissioning of wind power plants to ensure grid integration compatibility. In this paper, different types of wind power plant models based on the Western Electricity Coordinating Council Wind Generator Modeling Group's standardization efforts are implemented on a real-time digital simulator, and different test cases are used to gauge their grid integration capability. The low-voltage ride through and reactive power support capability and limitations of wind turbine generators under different grid conditions are explored. Several types of transient events (e.g., symmetrical and unsymmetrical faults, frequency dips) are included in the test cases. The differences in responses from different types of wind turbine are discussed in detail.

  6. Stochastic Ordering of Interferences in Large-scale Wireless Networks

    E-Print Network [OSTI]

    Lee, Junghoon

    2012-01-01

    Stochastic orders are binary relations defined on probability distributions which capture intuitive notions like being larger or being more variable. This paper introduces stochastic ordering of interference distributions in large-scale networks modeled as point process. Interference is the main performance-limiting factor in most wireless networks, thus it is important to understand its statistics. Since closed-form results for the distribution of interference for such networks are only available in limited cases, interference of networks are compared using stochastic orders, even when closed form expressions for interferences are not tractable. We show that the interference from a large-scale network depends on the fading distributions with respect to the stochastic Laplace transform order. The condition for path-loss models is also established to have stochastic ordering between interferences. The stochastic ordering of interferences between different networks are also shown. Monte-Carlo simulations are us...

  7. Large-scale flow generation by inhomogeneous helicity

    E-Print Network [OSTI]

    Yokoi, Nobumitsu

    2015-01-01

    The effect of kinetic helicity (velocity--vorticity correlation) on turbulent momentum transport is investigated. The turbulent kinetic helicity (pseudoscalar) enters into the Reynolds stress (mirrorsymmetric tensor) expression in the form of a helicity gradient as the coupling coefficient for the mean vorticity and/or the angular velocity (axial vector), which suggests the possibility of mean-flow generation in the presence of inhomogeneous helicity. This inhomogeneous helicity effect, which was previously confirmed at the level of a turbulence- or closure-model simulation, is examined with the aid of direct numerical simulations of rotating turbulence with non-uniform helicity sustained by an external forcing. The numerical simulations show that the spatial distribution of the Reynolds stress is in agreement with the helicity-related term coupled with the angular velocity, and that a large-scale flow is generated in the direction of angular velocity. Such a large-scale flow is not induced in the case of hom...

  8. LARGE-SCALE MOTIONS IN THE PERSEUS GALAXY CLUSTER

    SciTech Connect (OSTI)

    Simionescu, A.; Werner, N.; Urban, O.; Allen, S. W.; Fabian, A. C.; Sanders, J. S.; Mantz, A.; Nulsen, P. E. J.; Takei, Y.

    2012-10-01

    By combining large-scale mosaics of ROSAT PSPC, XMM-Newton, and Suzaku X-ray observations, we present evidence for large-scale motions in the intracluster medium of the nearby, X-ray bright Perseus Cluster. These motions are suggested by several alternating and interleaved X-ray bright, low-temperature, low-entropy arcs located along the east-west axis, at radii ranging from {approx}10 kpc to over a Mpc. Thermodynamic features qualitatively similar to these have previously been observed in the centers of cool-core clusters, and were successfully modeled as a consequence of the gas sloshing/swirling motions induced by minor mergers. Our observations indicate that such sloshing/swirling can extend out to larger radii than previously thought, on scales approaching the virial radius.

  9. Simulating the Large-Scale Structure of HI Intensity Maps

    E-Print Network [OSTI]

    Seehars, Sebastian; Witzemann, Amadeus; Refregier, Alexandre; Amara, Adam; Akeret, Joel

    2015-01-01

    Intensity mapping of neutral hydrogen (HI) is a promising observational probe of cosmology and large-scale structure. We present wide field simulations of HI intensity maps based on N-body simulations, the halo model, and a phenomenological prescription for assigning HI mass to halos. The simulations span a redshift range of 0.35 HI. We apply and compare several estimators for the angular power spectrum and its covariance. We verify that they agree with analytic predictions on large scales and study the validity of approximations based on Gaussian random fields, particularly in the context of the covariance. We discuss how our results and the simulated maps can be useful for planning and interpreting future HI intensity mapping surveys.

  10. Clusters and Large-Scale Structure: the Synchrotron Keys

    E-Print Network [OSTI]

    Rudnick, L; Andernach, H; Battaglia, N; Brown, S; Brunetti, Gf; Burns, J; Clarke, T; Dolag, K; Farnsworth, D; Giovannini, G; Hallman, E; Johnston-Hollit, M; Jones, T W; Kang, H; Kassim, N; Kravtsov, A; Lazio, J; Lonsdale, C; McNamara, B; Myers, S; Owen, F; Pfrommer, C; Ryu, D; Sarazin, C; Subrahmanyan, R; Taylor, G; Taylor, R

    2009-01-01

    For over four decades, synchrotron-radiating sources have played a series of pathfinding roles in the study of galaxy clusters and large scale structure. Such sources are uniquely sensitive to the turbulence and shock structures of large-scale environments, and their cosmic rays and magnetic fields often play important dynamic and thermodynamic roles. They provide essential complements to studies at other wavebands. Over the next decade, they will fill essential gaps in both cluster astrophysics and the cosmological growth of structure in the universe, especially where the signatures of shocks and turbulence, or even the underlying thermal plasma itself, are otherwise undetectable. Simultaneously, synchrotron studies offer a unique tool for exploring the fundamental question of the origins of cosmic magnetic fields. This work will be based on the new generation of m/cm-wave radio telescopes now in construction, as well as major advances in the sophistication of 3-D MHD simulations.

  11. Performance Health Monitoring of Large-Scale Systems

    SciTech Connect (OSTI)

    Rajamony, Ram

    2014-11-20

    This report details the progress made on the ASCR funded project Performance Health Monitoring for Large Scale Systems. A large-­?scale application may not achieve its full performance potential due to degraded performance of even a single subsystem. Detecting performance faults, isolating them, and taking remedial action is critical for the scale of systems on the horizon. PHM aims to develop techniques and tools that can be used to identify and mitigate such performance problems. We accomplish this through two main aspects. The PHM framework encompasses diagnostics, system monitoring, fault isolation, and performance evaluation capabilities that indicates when a performance fault has been detected, either due to an anomaly present in the system itself or due to contention for shared resources between concurrently executing jobs. Software components called the PHM Control system then build upon the capabilities provided by the PHM framework to mitigate degradation caused by performance problems.

  12. PERSPECTIVES This large-scale variation in base compo-

    E-Print Network [OSTI]

    Eyre-Walker, Adam

    ,000 kb kb 2,500 3,000 3,500 4,000 b Class II Class III Class I Figure 1 | Large-scale variation in G+C, according to its G+C content, by ultracentrifugation, and found that there was substantial variation in its mammals and birds, and that the G+C content of large (>300-kb) blocks of DNA varied from ~35 to 55

  13. Greening the Networks of Large-Scale Distributed Systems

    E-Print Network [OSTI]

    Lefèvre, Laurent

    -tier fat-tree architecture Energy savings of Green compared to No off : - 73% for a 20% workload - 68Greening the Networks of Large-Scale Distributed Systems ENS de Lyon ­ INRIA RESO ­ UCBL ­ LIP://perso.ens-lyon.fr/annececile.orgerie/networks.html HERMES : High-level Energy-awaRe Model for bandwidth reservation in End-to-end NetworkS · Unused network

  14. Primordial quantum nonequilibrium and large-scale cosmic anomalies

    E-Print Network [OSTI]

    Samuel Colin; Antony Valentini

    2015-06-12

    We study incomplete relaxation to quantum equilibrium at long wavelengths, during a pre-inflationary phase, as a possible explanation for the reported large-scale anomalies in the cosmic microwave background (CMB). Our scenario makes use of the de Broglie-Bohm pilot-wave formulation of quantum theory, in which the Born probability rule has a dynamical origin. The large-scale power deficit could arise from incomplete relaxation for the amplitudes of the primordial perturbations. We show, by numerical simulations for a spectator scalar field, that if the pre-inflationary era is radiation dominated then the deficit in the emerging power spectrum will have a characteristic shape (an inverse-tangent dependence on wavenumber k, with oscillations). It is found that our scenario is able to produce a power deficit in the observed region and of the observed (approximate) magnitude for an appropriate choice of cosmological parameters. We also discuss the large-scale anisotropy, which might arise from incomplete relaxation for the phases of the primordial perturbations. We present numerical simulations for phase relaxation, and we show how to define characteristic scales for amplitude and phase nonequilibrium. The extent to which the data might support our scenario is left as a question for future work. Our results suggest that we have a potentially viable model that might explain two apparently independent cosmic anomalies by means of a single mechanism.

  15. A Model of Plasma Heating by Large-Scale Flow

    E-Print Network [OSTI]

    Pongkitiwanichakul, P; Boldyrev, S; Mason, J; Perez, J C

    2015-01-01

    In this work we study the process of energy dissipation triggered by a slow large scale motion of a magnetized conducting fluid. Our consideration is motivated by the problem of heating the solar corona, which is believed to be governed by fast reconnection events set off by the slow motion of magnetic field lines anchored in the photospheric plasma. To elucidate the physics governing the disruption of the imposed laminar motion and the energy transfer to small scales, we propose a simplified model where the large-scale motion of magnetic field lines is prescribed not at the footpoints but rather imposed volumetrically. As a result, the problem can be treated numerically with an efficient, highly-accurate spectral method, allowing us to use a resolution and statistical ensemble exceeding those of the previous work. We find that, even though the large-scale deformations are slow, they eventually lead to reconnection events that drive a turbulent state at smaller scales. The small-scale turbulence displays many...

  16. Geospatial Optimization of Siting Large-Scale Solar Projects

    SciTech Connect (OSTI)

    Macknick, J.; Quinby, T.; Caulfield, E.; Gerritsen, M.; Diffendorfer, J.; Haines, S.

    2014-03-01

    Recent policy and economic conditions have encouraged a renewed interest in developing large-scale solar projects in the U.S. Southwest. However, siting large-scale solar projects is complex. In addition to the quality of the solar resource, solar developers must take into consideration many environmental, social, and economic factors when evaluating a potential site. This report describes a proof-of-concept, Web-based Geographical Information Systems (GIS) tool that evaluates multiple user-defined criteria in an optimization algorithm to inform discussions and decisions regarding the locations of utility-scale solar projects. Existing siting recommendations for large-scale solar projects from governmental and non-governmental organizations are not consistent with each other, are often not transparent in methods, and do not take into consideration the differing priorities of stakeholders. The siting assistance GIS tool we have developed improves upon the existing siting guidelines by being user-driven, transparent, interactive, capable of incorporating multiple criteria, and flexible. This work provides the foundation for a dynamic siting assistance tool that can greatly facilitate siting decisions among multiple stakeholders.

  17. Wind Turbinie Generator System Power Performance Test Report for the Mariah Windspire 1-kW Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.; Bowen, A.; Jager, D.

    2009-12-01

    This report summarizes the results of a power performance test that NREL conducted on the Mariah Windspire 1-kW wind turbine. During this test, two configurations were tested on the same turbine. In the first configuration, the turbine inverter was optimized for power production. In the second configuration, the turbine inverter was set for normal power production. In both configurations, the inverter experienced failures and the tests were not finished.

  18. First International Workshop on Grid Simulator Testing of Wind Turbine Drivetrains: Workshop Proceedings

    SciTech Connect (OSTI)

    Gevorgian, V.; Link, H.; McDade, M.; Mander, A.; Fox, J. C.; Rigas, N.

    2013-11-01

    This report summarizes the proceedings of the First International Workshop on Grid Simulator Testing of Wind Turbine Drivetrains, held from June 13 to 14, 2013, at the National Renewable Energy Laboratory's National Wind Technology Center, located south of Boulder, Colorado. The workshop was sponsored by the U.S. Department of Energy and cohosted by the National Renewable Energy Laboratory and Clemson University under ongoing collaboration via a cooperative research and development agreement. The purpose of the workshop was to provide a forum to discuss the research, testing needs, and state-of-the-art apparatuses involved in grid compliance testing of utility-scale wind turbine generators. This includes both dynamometer testing of wind turbine drivetrains ('ground testing') and field testing grid-connected wind turbines. Four sessions followed by discussions in which all attendees of the workshop were encouraged to participate comprised the workshop.

  19. Large scale structure and the generalised Chaplygin gas as dark energy

    E-Print Network [OSTI]

    T. Multamaki; M. Manera; E. Gaztanaga

    2003-10-31

    The growth of large scale structure is studied in a universe containing both cold dark matter (CDM) and generalized Chaplygin gas (GCg). GCg is assumed to contribute only to the background evolution of the universe while the CDM component collapses and forms structures. We present some new analytical as well as numerical results for linear and non-linear growth in such model. The model passes the standard cosmological distance test without the need of a cosmological constant (LCDM). But we find that the scenario is severely constrained by current observations of large scale structure. Any small deviations of the GCg parameters away from the standard Lambda dominated cosmology (LCDM) produces substantial suppression for the growth of structures.

  20. Wind Tunnel Aerodynamic Tests of Six Airfoils for Use on Small Wind Turbines; Period of Performance: October 31, 2002--January 31, 2003

    SciTech Connect (OSTI)

    Selig, M. S.; McGranahan, B. D.

    2004-10-01

    Wind Tunnel Aerodynamic Tests of Six Airfoils for Use on Small Wind Turbinesrepresents the fourth installment in a series of volumes documenting the ongoing work of th University of Illinois at Urbana-Champaign Low-Speed Airfoil Tests Program. This particular volume deals with airfoils that are candidates for use on small wind turbines, which operate at low Reynolds numbers.

  1. Wind Turbine Drivetrain Condition Monitoring During GRC Phase 1 and Phase 2 Testing

    SciTech Connect (OSTI)

    Sheng, S.; Link, H.; LaCava, W.; van Dam, J.; McNiff, B.; Veers, P.; Keller, J.; Butterfield, S.; Oyague, F.

    2011-10-01

    This report will present the wind turbine drivetrain condition monitoring (CM) research conducted under the phase 1 and phase 2 Gearbox Reliability Collaborative (GRC) tests. The rationale and approach for this drivetrain CM research, investigated CM systems, test configuration and results, and a discussion on challenges in wind turbine drivetrain CM and future research and development areas, will be presented.

  2. Kaman 40-kW wind system. Phase II. Fabrication and tests. Volume II. Technical report

    SciTech Connect (OSTI)

    Howes, H; Perley, R

    1981-01-01

    A program is underway to design, fabricate and test a horizontal axis Wind Turbine Generator (WTG) capable of producing 40 kW electrical output power in a 20 mph wind. Results are presented of the program effort covering fabrication and testing of the Wing Turbine Generator designed earlier. A minimum of difficulties were experienced during fabrication and, after successful completion of Contractor tests through 20 mph winds, the WTG was shipped to Rocky Flats, assembled and operated there. The 40 kW WTG is presently undergoing extended tests at Rockwell's Rocky Flats test facility.

  3. Wind Speed Forecasting for Power System Operation 

    E-Print Network [OSTI]

    Zhu, Xinxin

    2013-07-22

    In order to support large-scale integration of wind power into current electric energy system, accurate wind speed forecasting is essential, because the high variation and limited predictability of wind pose profound challenges to the power system...

  4. Small Wind Turbine Testing Results from the National Renewable Energy Lab

    SciTech Connect (OSTI)

    Bowen, A.; Huskey, A.; Link, H.; Sinclair, K.; Forsyth, T.; Jager, D.; van Dam, J.; Smith, J.

    2009-07-01

    The independent testing project was established at the National Renewable Energy Laboratory to help reduce the barriers of wind energy expansion. Among these barriers is a lack of independent testing results for small turbines.

  5. INTERAGENCY FIELD TEST & EVALUATION OF WIND TURBINE - RADAR INTERFEREN...

    Office of Environmental Management (EM)

    Results of IFT&E More Documents & Publications Final Report DE-EE0005380 - Assessment of Offshore Wind Farm Effects on Sea Surface, Subsurface and Airborne Electronic Systems...

  6. NREL Establishes a 1.5-MW Wind Turbine Test Platform for Research Partnerships (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-03-01

    Research turbine supports sustained technology development. For more than three decades, engineers at the National Renewable Energy Laboratory's (NREL) National Wind Technology Center (NWTC) have worked with the U.S. Department of Energy (DOE) Wind Program and industry partners to advance wind energy technology, improve wind turbine performance, and reduce the cost of energy. Although there have been dramatic increases in performance and drops in the cost of wind energy-from $0.80 per kilowatt-hour to between $0.06 and $0.08 per kilowatt-hour-the goal of the DOE Wind Program is to further increase performance and reduce the cost of energy for land-based systems so that wind energy can compete with natural gas by 2020. In support of the program's research and development (R and D) efforts, NREL has constructed state-of-the-art facilities at the NWTC where industry partners, universities, and other DOE laboratories can conduct tests and experiments to further advance wind technology. The latest facility to come online is the DOE-GE 1.5-MW wind turbine test platform. Working with DOE, NREL purchased and installed a GE 1.5-MW wind turbine at the NWTC in 2009. Since then, NREL engineers have extensively instrumented the machine, conducted power performance and full-system modal tests, and collected structural loads measurements to obtain baseline characterization of the turbine's power curve, vibration characteristics, and fatigue loads in the uniquely challenging NWTC inflow environment. By successfully completing a baseline for the turbine's performance and structural response, NREL engineers have established a test platform that can be used by industry, university, and DOE laboratory researchers to test wind turbine control systems and components. The new test platform will also enable researchers to acquire the measurements needed to develop and validate wind turbine models and improve design codes.

  7. Wind Program Announces $2 Million to Develop and Field Test Wind...

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

    today announced 2 million in funding to advance technologies that address wind development's potential impacts on wildlife. This funding will help address environmental siting and...

  8. Large scale obscuration and related climate effects open literature bibliography

    SciTech Connect (OSTI)

    Russell, N.A.; Geitgey, J.; Behl, Y.K.; Zak, B.D.

    1994-05-01

    Large scale obscuration and related climate effects of nuclear detonations first became a matter of concern in connection with the so-called ``Nuclear Winter Controversy`` in the early 1980`s. Since then, the world has changed. Nevertheless, concern remains about the atmospheric effects of nuclear detonations, but the source of concern has shifted. Now it focuses less on global, and more on regional effects and their resulting impacts on the performance of electro-optical and other defense-related systems. This bibliography reflects the modified interest.

  9. Large-Scale Anisotropy of EGRET Gamma Ray Sources

    E-Print Network [OSTI]

    Luis Anchordoqui; Thomas McCauley; Thomas Paul; Olaf Reimer; Diego F. Torres

    2005-06-24

    In the course of its operation, the EGRET experiment detected high-energy gamma ray sources at energies above 100 MeV over the whole sky. In this communication, we search for large-scale anisotropy patterns among the catalogued EGRET sources using an expansion in spherical harmonics, accounting for EGRET's highly non-uniform exposure. We find significant excess in the quadrupole and octopole moments. This is consistent with the hypothesis that, in addition to the galactic plane, a second mid-latitude (5^{\\circ} < |b| < 30^{\\circ}) population, perhaps associated with the Gould belt, contributes to the gamma ray flux above 100 MeV.

  10. Future large-scale water-Cherenkov detector

    E-Print Network [OSTI]

    L. Agostino; M. Buizza-Avanzini; M. Marafini; T. Patzak; A. Tonazzo; M. Dracos; N. Vassilopoulos; D. Duchesneau; M. Mezzetto; L. Mosca

    2013-06-28

    MEMPHYS (MEgaton Mass PHYSics) is a proposed large-scale water-Cherenkov experiment to be performed deep underground. It is dedicated to nucleon decay searches and the detection of neutrinos from supernovae, solar, and atmospheric neutrinos, as well as neutrinos from a future beam to measure the CP violating phase in the leptonic sector and the mass hierarchy. This paper provides an overview of the latest studies on the expected performance of MEMPHYS in view of detailed estimates of its physics reach, mainly concerning neutrino beams.

  11. Large-scale cosmic flows and moving dark energy

    E-Print Network [OSTI]

    Jose Beltran Jimenez; Antonio L. Maroto

    2009-02-24

    Large-scale matter bulk flows with respect to the cosmic microwave background have very recently been detected on scales 100 Mpc/h and 300 Mpc/h by using two different techniques showing an excellent agreement in the motion direction. However, the unexpectedly large measured amplitudes are difficult to understand within the context of standard LCDM cosmology. In this work we show that the existence of such a flow could be signaling the presence of moving dark energy at the time when photons decoupled from matter. We also comment on the relation between the direction of the CMB dipole and the preferred axis observed in the quadrupole in this scenario.

  12. Streamflow forecasting for large-scale hydrologic systems 

    E-Print Network [OSTI]

    Awwad, Haitham Munir

    1991-01-01

    Farland (Member) J esTR ao (Head of Department) May 1991 ABSTRACT Streamflow Forecasting for Large-Scale Hydrologic Systems. (May 1991) Haitham Munir Awwad, B. S. , University of Jordan Chair of Advisory Committee: Dr. Juan B. Valdes An on-line streamflow... thankful to Dr. Ralph A. Wurbs and Dr. Marshall J. McFarland for their assistance on my advisory committee. Support for this thesis by the Department of Civil Engineering through the Engineering Excellence Fund, and by the U, S. Army Corps of Engineers...

  13. Large Scale GSHP as Alternative Energy for American Farmers Geothermal

    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:QAsource History View NewTexas:Montezuma, Arizona: Energy ResourcesProject | Open Energy Information Large Scale

  14. Large Scale Renewable Energy Property Tax Abatement (Nevada State...

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

    renewable energy resources including solar, wind, biomass*, fuel cells, geothermal or hydro. Generation facilities must have a capacity of at least 10 megawatts (MW). Facilities...

  15. PATHWAYS OF LARGE-SCALE MAGNETIC COUPLINGS BETWEEN SOLAR CORONAL...

    Office of Scientific and Technical Information (OSTI)

    the connections from the solar surface into the heliosphere to properly model the solar wind, its perturbations, and the generation and propagation of solar energetic particles....

  16. Testing Active Power Control from Wind Power at the National Wind Technology Center (NWTC) (Presentation)

    SciTech Connect (OSTI)

    Ela, E.

    2011-05-01

    In order to keep the electricity grid stable and the lights on, the power system relies on certain responses from its generating fleet. This presentation evaluates the potential for wind turbines and wind power plants to provide these services and assist the grid during critical times.

  17. Large scale structure simulations of inhomogeneous LTB void models

    E-Print Network [OSTI]

    David Alonso; Juan Garcia-Bellido; Troels Haugboelle; Julian Vicente

    2011-01-11

    We perform numerical simulations of large scale structure evolution in an inhomogeneous Lemaitre-Tolman-Bondi (LTB) model of the Universe. We follow the gravitational collapse of a large underdense region (a void) in an otherwise flat matter-dominated Einstein-deSitter model. We observe how the (background) density contrast at the centre of the void grows to be of order one, and show that the density and velocity profiles follow the exact non-linear LTB solution to the full Einstein equations for all but the most extreme voids. This result seems to contradict previous claims that fully relativistic codes are needed to properly handle the non-linear evolution of large scale structures, and that local Newtonian dynamics with an explicit expansion term is not adequate. We also find that the (local) matter density contrast grows with the scale factor in a way analogous to that of an open universe with a value of the matter density OmegaM(r) corresponding to the appropriate location within the void.

  18. Large scale CMB anomalies from thawing cosmic strings

    E-Print Network [OSTI]

    Christophe Ringeval; Daisuke Yamauchi; Jun'ichi Yokoyama; Francois R. Bouchet

    2015-10-07

    Cosmic strings formed during inflation are expected to be either diluted over super-Hubble distances, i.e., invisible today, or to have crossed our past light cone very recently. We discuss the latter situation in which a few strings imprint their signature in the Cosmic Microwave Background (CMB) Anisotropies after recombination. Being almost frozen in the Hubble flow, these strings are quasi static and evade almost all of the previously derived constraints on their tension while being able to source large scale anisotropies in the CMB sky. Using a local variance estimator on thousand of numerically simulated Nambu-Goto all sky maps, we compute the expected signal and show that it can mimic a dipole modulation at large angular scales while being negligible at small angles. Interestingly, such a scenario generically produces one cold spot from the thawing of a cosmic string loop. Mixed with anisotropies of inflationary origin, we find that a few strings of tension GU = O(1) x 10^(-6) match the amplitude of the dipole modulation reported in the Planck satellite measurements and could be at the origin of other large scale anomalies.

  19. Wind-To-Hydrogen Project: Operational Experience, Performance Testing, and Systems Integration

    SciTech Connect (OSTI)

    Harrison, K. W.; Martin, G. D.; Ramsden, T. G.; Kramer, W. E.; Novachek, F. J.

    2009-03-01

    The Wind2H2 system is fully functional and continues to gather performance data. In this report, specifications of the Wind2H2 equipment (electrolyzers, compressor, hydrogen storage tanks, and the hydrogen fueled generator) are summarized. System operational experience and lessons learned are discussed. Valuable operational experience is shared through running, testing, daily operations, and troubleshooting the Wind2H2 system and equipment errors are being logged to help evaluate the reliability of the system.

  20. Safety and Function Test Report for the Viryd CS8 Wind Turbine

    SciTech Connect (OSTI)

    Roadman, J.; Murphy, M.; van Dam, J.

    2013-10-01

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. Several turbines were selected for testing at the National Wind Technology Center (NWTC) at the National Renewable Energy Laboratory (NREL) as a part of the Small Wind Turbine Independent Testing project. Safety and function testing is one of up to five tests that may be performed on the turbines. Other tests include duration, power performance, acoustic noise, and power quality. Viryd Technologies, Inc. of Austin, Texas, was the recipient of the DOE grant and provided the turbine for testing.

  1. Testing and Modeling of a 3-MW Wind Turbine Using Fully Coupled Simulation Codes (Poster)

    SciTech Connect (OSTI)

    LaCava, W.; Guo, Y.; Van Dam, J.; Bergua, R.; Casanovas, C.; Cugat, C.

    2012-06-01

    This poster describes the NREL/Alstom Wind testing and model verification of the Alstom 3-MW wind turbine located at NREL's National Wind Technology Center. NREL,in collaboration with ALSTOM Wind, is studying a 3-MW wind turbine installed at the National Wind Technology Center(NWTC). The project analyzes the turbine design using a state-of-the-art simulation code validated with detailed test data. This poster describes the testing and the model validation effort, and provides conclusions about the performance of the unique drive train configuration used in this wind turbine. The 3-MW machine has been operating at the NWTC since March 2011, and drive train measurements will be collected through the spring of 2012. The NWTC testing site has particularly turbulent wind patterns that allow for the measurement of large transient loads and the resulting turbine response. This poster describes the 3-MW turbine test project, the instrumentation installed, and the load cases captured. The design of a reliable wind turbine drive train increasingly relies on the use of advanced simulation to predict structural responses in a varying wind field. This poster presents a fully coupled, aero-elastic and dynamic model of the wind turbine. It also shows the methodology used to validate the model, including the use of measured tower modes, model-to-model comparisons of the power curve, and mainshaft bending predictions for various load cases. The drivetrain is designed to only transmit torque to the gearbox, eliminating non-torque moments that are known to cause gear misalignment. Preliminary results show that the drivetrain is able to divert bending loads in extreme loading cases, and that a significantly smaller bending moment is induced on the mainshaft compared to a three-point mounting design.

  2. The Origin of Large-scale HI structures in the Magellanic Bridge

    E-Print Network [OSTI]

    E. Muller; K. Bekki

    2007-06-27

    We investigate the formation of a number of key large-scale HI features in the ISM of the Magellanic Bridge using dissipationless numerical simulation techniques. This study comprises the first direct comparison between detailed HI maps of the Bridge and numerical simulations. We confirm that the SMC forms two tidal filaments: a near arm, which forms the connection between the SMC and LMC, and a counterarm. We show that the HI of the most dense part of the Bridge can become arranged into a bimodal configuration, and that the formation of a "loop" of HI, located off the North-Eastern edge of the SMC can be reproduced simply as a projection of the counter-arm, and without invoking localised energy-deposition processes such as SNe or stellar winds.

  3. Large-scale jets in the magnetosheath and plasma penetration across the magnetopause: THEMIS observations

    E-Print Network [OSTI]

    Dmitriev, A V

    2015-01-01

    THEMIS multi-point observation of the plasma and magnetic fields, conducted simultaneously in the dayside magnetosheath and magnetosphere, were used to collect 646 large-scale magnetosheath plasma jets interacting with the magnetopause. The jets were identified as dense and fast streams of the magnetosheath plasma whose energy density is higher than that of the upstream solar wind. The jet interaction with the magnetopause was revealed from sudden inward motion of the magnetopause and an enhancement in the geomagnetic field. The penetration was determined as appearance of the magnetosheath plasma against the background of the hot magnetospheric particle population. We found that almost 60% of the jets penetrated through the magnetopause. Vast majority of the penetrating jets was characterized by high velocities V > 220 km/s and kinetic bk > 1 that corresponded to a combination of finite Larmor radius effect with a mechanisms of impulsive penetration. The average plasma flux in the penetrating jets was found t...

  4. Grid Simulator for Testing a Wind Turbine on Offshore Floating Platform

    SciTech Connect (OSTI)

    Gevorgian, V.

    2012-02-01

    An important aspect of such offshore testing of a wind turbine floating platform is electrical loading of the wind turbine generator. An option of interconnecting the floating wind turbine with the onshore grid via submarine power cable is limited by many factors such as costs and associated environmental aspects (i.e., an expensive and lengthy sea floor study is needed for cable routing, burial, etc). It appears to be a more cost effective solution to implement a standalone grid simulator on a floating platform itself for electrical loading of the test wind turbine. Such a grid simulator must create a stable fault-resilient voltage and frequency bus (a micro grid) for continuous operation of the test wind turbine. In this report, several electrical topologies for an offshore grid simulator were analyzed and modeled.

  5. Power Performance Test Report for the Viryd CS8 Wind Turbine

    SciTech Connect (OSTI)

    Roadman, J.; Murphy, M.; van Dam, J.

    2012-12-01

    This report contains the results of the power performance test that was performed on a Viryd CS8 wind turbine as part of the DOE Independent Testing project. The test is an accredited test to the IEC 61400-12-1 power performance standard.

  6. Structural Testing of 9 m Carbon Fiber Wind Turbine Research Blades*

    E-Print Network [OSTI]

    Structural Testing of 9 m Carbon Fiber Wind Turbine Research Blades* Joshua Paquette Sandia Laboratory** , Golden, CO, 80401 Three 9 m carbon fiber wind turbine blades have been designed through Systems Consulting (GEC) , Dynamic Design Engineering , and MDZ Consulting§§ ; and seven blades from each

  7. WindTurbineGenerator Introduction of the Renewable Micro-Grid Test-Bed

    E-Print Network [OSTI]

    Johnson, Eric E.

    Introduction of the Renewable Micro-Grid Test-Bed Dr. Wenxin Liu Smart Micro-grid and Renewable Technology/AC Inverter Wind Turbine: Torque or Speed Control Wind Generator: PQ Control Cubicle #4: Energy Storage - ± 70A Renewable Microgrid Shipboard Power System ZEDSZEDS ZEDSZEDS ZEDS PDM PDM PMM PMM PDM PMM PMM PDM

  8. Nuclear-pumped lasers for large-scale applications

    SciTech Connect (OSTI)

    Anderson, R.E.; Leonard, E.M.; Shea, R.F.; Berggren, R.R.

    1989-05-01

    Efficient initiation of large-volume chemical lasers may be achieved by neutron induced reactions which produce charged particles in the final state. When a burst mode nuclear reactor is used as the neutron source, both a sufficiently intense neutron flux and a sufficiently short initiation pulse may be possible. Proof-of-principle experiments are planned to demonstrate lasing in a direct nuclear-pumped large-volume system; to study the effects of various neutron absorbing materials on laser performance; to study the effects of long initiation pulse lengths; to demonstrate the performance of large-scale optics and the beam quality that may be obtained; and to assess the performance of alternative designs of burst systems that increase the neutron output and burst repetition rate. 21 refs., 8 figs., 5 tabs.

  9. Nuclear-pumped lasers for large-scale applications

    SciTech Connect (OSTI)

    Anderson, R.E.; Leonard, E.M.; Shea, R.E.; Berggren, R.R.

    1988-01-01

    Efficient initiation of large-volume chemical lasers may be achieved by neutron induced reactions which produce charged particles in the final state. When a burst mode nuclear reactor is used as the neutron source, both a sufficiently intense neutron flux and a sufficient short initiation pulse may be possible. Proof-of-principle experiments are planned to demonstrate lasing in a direct nuclear-pumped large-volume system: to study the effects of various neutron absorbing materials on laser performance; to study the effects of long initiation pulse lengths; to determine the performance of large-scale optics and the beam quality that may bo obtained; and to assess the performance of alternative designs of burst systems that increase the neutron output and burst repetition rate. 21 refs., 7 figs., 5 tabs.

  10. The XMM/Megacam-VST/VIRMOS Large Scale Structure Survey

    E-Print Network [OSTI]

    M. Pierre

    2000-11-08

    The objective of the XMM-LSS Survey is to map the large scale structure of the universe, as highlighted by clusters and groups of galaxies, out to a redshift of about 1, over a single 8x8 sq.deg. area. For the first time, this will reveal the topology of the distribution of the deep potential wells and provide statistical measurements at truly cosmological distances. In addition, clusters identified via their X-ray properties will form the basis for the first uniformly-selected, multi-wavelength survey of the evolution of clusters and individual cluster galaxies as a function of redshift. The survey will also address the very important question of the QSO distribution within the cosmic web.

  11. Unfolding large-scale online collaborative human dynamics

    E-Print Network [OSTI]

    Zha, Yilong; Zhou, Changsong

    2015-01-01

    Large-scale interacting human activities underlie all social and economic phenomena, but quantitative understanding of regular patterns and mechanism is very challenging and still rare. Self-organized online collaborative activities with precise record of event timing provide unprecedented opportunity. Our empirical analysis of the history of millions of updates in Wikipedia shows a universal double power-law distribution of time intervals between consecutive updates of an article. We then propose a generic model to unfold collaborative human activities into three modules: (i) individual behavior characterized by Poissonian initiation of an action, (ii) human interaction captured by a cascading response to others with a power-law waiting time, and (iii) population growth due to increasing number of interacting individuals. This unfolding allows us to obtain analytical formula that is fully supported by the universal patterns in empirical data. Our modeling approaches reveal "simplicity" beyond complex interac...

  12. Planning under uncertainty solving large-scale stochastic linear programs

    SciTech Connect (OSTI)

    Infanger, G. . Dept. of Operations Research Technische Univ., Vienna . Inst. fuer Energiewirtschaft)

    1992-12-01

    For many practical problems, solutions obtained from deterministic models are unsatisfactory because they fail to hedge against certain contingencies that may occur in the future. Stochastic models address this shortcoming, but up to recently seemed to be intractable due to their size. Recent advances both in solution algorithms and in computer technology now allow us to solve important and general classes of practical stochastic problems. We show how large-scale stochastic linear programs can be efficiently solved by combining classical decomposition and Monte Carlo (importance) sampling techniques. We discuss the methodology for solving two-stage stochastic linear programs with recourse, present numerical results of large problems with numerous stochastic parameters, show how to efficiently implement the methodology on a parallel multi-computer and derive the theory for solving a general class of multi-stage problems with dependency of the stochastic parameters within a stage and between different stages.

  13. Recovery Act - Large Scale SWNT Purification and Solubilization

    SciTech Connect (OSTI)

    Michael Gemano; Dr. Linda B. McGown

    2010-10-07

    The goal of this Phase I project was to establish a quantitative foundation for development of binary G-gels for large-scale, commercial processing of SWNTs and to develop scientific insight into the underlying mechanisms of solubilization, selectivity and alignment. In order to accomplish this, we performed systematic studies to determine the effects of G-gel composition and experimental conditions that will enable us to achieve our goals that include (1) preparation of ultra-high purity SWNTs from low-quality, commercial SWNT starting materials, (2) separation of MWNTs from SWNTs, (3) bulk, non-destructive solubilization of individual SWNTs in aqueous solution at high concentrations (10-100 mg/mL) without sonication or centrifugation, (4) tunable enrichment of subpopulations of the SWNTs based on metallic vs. semiconductor properties, diameter, or chirality and (5) alignment of individual SWNTs.

  14. Training a Large Scale Classifier with the Quantum Adiabatic Algorithm

    E-Print Network [OSTI]

    Hartmut Neven; Vasil S. Denchev; Geordie Rose; William G. Macready

    2009-12-04

    In a previous publication we proposed discrete global optimization as a method to train a strong binary classifier constructed as a thresholded sum over weak classifiers. Our motivation was to cast the training of a classifier into a format amenable to solution by the quantum adiabatic algorithm. Applying adiabatic quantum computing (AQC) promises to yield solutions that are superior to those which can be achieved with classical heuristic solvers. Interestingly we found that by using heuristic solvers to obtain approximate solutions we could already gain an advantage over the standard method AdaBoost. In this communication we generalize the baseline method to large scale classifier training. By large scale we mean that either the cardinality of the dictionary of candidate weak classifiers or the number of weak learners used in the strong classifier exceed the number of variables that can be handled effectively in a single global optimization. For such situations we propose an iterative and piecewise approach in which a subset of weak classifiers is selected in each iteration via global optimization. The strong classifier is then constructed by concatenating the subsets of weak classifiers. We show in numerical studies that the generalized method again successfully competes with AdaBoost. We also provide theoretical arguments as to why the proposed optimization method, which does not only minimize the empirical loss but also adds L0-norm regularization, is superior to versions of boosting that only minimize the empirical loss. By conducting a Quantum Monte Carlo simulation we gather evidence that the quantum adiabatic algorithm is able to handle a generic training problem efficiently.

  15. Large-Scale Field Study of Landfill Covers at Sandia National Laboratories

    SciTech Connect (OSTI)

    Dwyer, S.F.

    1998-09-01

    A large-scale field demonstration comparing final landfill cover designs has been constructed and is currently being monitored at Sandia National Laboratories in Albuquerque, New Mexico. Two conventional designs (a RCRA Subtitle `D' Soil Cover and a RCRA Subtitle `C' Compacted Clay Cover) were constructed side-by-side with four alternative cover test plots designed for dry environments. The demonstration is intended to evaluate the various cover designs based on their respective water balance performance, ease and reliability of construction, and cost. This paper presents an overview of the ongoing demonstration.

  16. Sandia Energy - Computational Fluid Dynamics & Large-Scale Uncertainty...

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

    Simulation of a synthetic gust (inviscid Taylor Vortex) passing through a 3-bladed Vertical Axis Wind Turbine rotor. By cwdd|2015-04-20T14:47:52+00:00April 17th,...

  17. Design and Test of a Vertical-Axis Wind Turbine with Pitch Control J. J. Miau1,a

    E-Print Network [OSTI]

    Leu, Tzong-Shyng "Jeremy"

    Design and Test of a Vertical-Axis Wind Turbine with Pitch Control J. J. Miau1,a , S. Y. Liang2 , R, USA a jjmiau@mail.ncku.edu.tw Keywords: vertical-axis wind turbine, pitch control, wind of a small vertical-axis wind turbine. Benefits gained can be shown by the experimental and numerical results

  18. DAMAGE DETECTION METHODS ON WIND TURBINE BLADE TESTING WITH WIRED AND WIRELESS ACCELEROMETER SENSORS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    DAMAGE DETECTION METHODS ON WIND TURBINE BLADE TESTING WITH WIRED AND WIRELESS ACCELEROMETER degrees of damage. Excitation was performed in two ways: near the delamination zone to demonstrate their performance. We explore methods for determining damage. We first explore results

  19. An Updated Procedure for Tare and Interference Wind Tunnel Testing of Strut-Mounted Models 

    E-Print Network [OSTI]

    Kutz, Douglas M

    2014-05-02

    Despite advances in modern computing and simulation, wind tunnel testing remains the most trusted method for determining aerodynamic vehicle behavior. Corrections are applied to accurately obtain results representative of free-air performance due...

  20. Reducing Data Center Loads for a Large-Scale, Net Zero Office...

    Energy Savers [EERE]

    Reducing Data Center Loads for a Large-Scale, Net Zero Office Building Reducing Data Center Loads for a Large-Scale, Net Zero Office Building Document describes the design,...

  1. The IR-resummed Effective Field Theory of Large Scale Structures...

    Office of Scientific and Technical Information (OSTI)

    The IR-resummed Effective Field Theory of Large Scale Structures Citation Details In-Document Search Title: The IR-resummed Effective Field Theory of Large Scale Structures We...

  2. HyLights -- Tools to Prepare the Large-Scale European Demonstration...

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

    HyLights -- Tools to Prepare the Large-Scale European Demonstration Projects on Hydrogen for Transport HyLights -- Tools to Prepare the Large-Scale European Demonstration Projects...

  3. High-R Walls for New Construction Structural Performance: Wind Pressure Testing

    SciTech Connect (OSTI)

    DeRenzis, A.; Kochkin, V.

    2013-01-01

    This technical report is focused primarily on laboratory testing that evaluates wind pressure performance characteristics for wall systems constructed with exterior insulating sheathing. This research and test activity will help to facilitate the ongoing use of non-structural sheathing options and provide a more in-depth understanding of how wall system layers perform in response to high wind perturbations normal to the surface.

  4. High-R Walls for New Construction Structural Performance. Wind Pressure Testing

    SciTech Connect (OSTI)

    DeRenzis, A.; Kochkin, V.

    2013-01-01

    This technical report is focused primarily on laboratory testing that evaluates wind pressure performance characteristics for wall systems constructed with exterior insulating sheathing. This research and test activity will help to facilitate the ongoing use of non-structural sheathing options and provide a more in-depth understanding of how wall system layers perform in response to high wind perturbations normal to the surface.

  5. Acoustic Noise Test Report for the SWIFT Wind Turbine in Boulder, CO

    SciTech Connect (OSTI)

    Roadman, J.; Huskey, A.

    2013-04-01

    This report summarizes the results of an acoustic noise test that the National Renewable Energy Laboratory (NREL) conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 11: Acoustic Noise Measurement Techniques, IEC 61400-11 Ed.2.1, 2006-11. However, because the SWIFT is a small turbine, as defined by IEC, NREL used 10-second averages instead of 60-second averages and utilized binning by wind speed instead of regression analysis.

  6. Acoustic Noise Test Report for the Viryd CS8 Wind Turbine

    SciTech Connect (OSTI)

    Roadman, J.; Huskey, A.

    2013-07-01

    This report summarizes the results of an acoustic noise test that the National Renewable Energy Laboratory (NREL) conducted on the Viryd CS8 wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 11: Acoustic Noise Measurement Techniques, IEC 61400-11 Ed.2.1, 2006-11. However, because the Viryd CS8 is a small turbine, as defined by IEC, NREL used 10-second averages instead of 60-second averages and binning by wind speed instead of regression analysis.

  7. SMALL AND LARGE-SCALE MAGNETIC FIELDS INVOLVED WITH SOLAR FLARES

    E-Print Network [OSTI]

    ABSTRACT SMALL AND LARGE-SCALE MAGNETIC FIELDS INVOLVED WITH SOLAR FLARES by Chang Liu Solar flares of an EUV sigmoid. #12;SMALL AND LARGE-SCALE MAGNETIC FIELDS INVOLVED WITH SOLAR FLARES by Chang Liu RESERVED #12;APPROVAL PAGE SMALL AND LARGE-SCALE MAGNETIC FIELDS INVOLVED WITH SOLAR FLARES Chang Liu Dr

  8. Microwave Mapping As a Possible New Diagnostic Tool for LargeScale Solar Magnetic Fields

    E-Print Network [OSTI]

    Petrovay, Kristóf

    Microwave Mapping As a Possible New Diagnostic Tool for Large­Scale Solar Magnetic Fields M of microwave maps in the study of weak large­scale solar magnetic fields is discussed. Our knowledge of the large­scale solar background magnetic fields is limited by the circumstance that magnetograph

  9. UNIVERSITY OF SOUTHERN CALIFORNIA Large-Scale Active Middleware (LSAM) September 3, 1997 1 of 27

    E-Print Network [OSTI]

    Touch, Joe

    transport UNIVERSITY OF SOUTHERN CALIFORNIA Large-Scale Active Middleware (LSAM) September 3, 1997 8 of 27UNIVERSITY OF SOUTHERN CALIFORNIA Large-Scale Active Middleware (LSAM) September 3, 1997 1 of 27 Middleware Project USC/ISI Computer Networks Division UNIVERSITY OF SOUTHERN CALIFORNIA Large-Scale Active

  10. Development of a Large-Scale Ubiquitous Computing Interface We propose the development of a unique experimental facility for the exploration of large-scale ubiquitous computing

    E-Print Network [OSTI]

    Haro, Antonio

    Development of a Large-Scale Ubiquitous Computing Interface 1 Summary We propose the development of a unique experimental facility for the exploration of large-scale ubiquitous computing interfaces reveal how it will be used and the scientific issues raised. Current ubiquitous computing experiments

  11. Large Scale Obscuration and Related Climate Effects Workshop: Proceedings

    SciTech Connect (OSTI)

    Zak, B.D.; Russell, N.A.; Church, H.W.; Einfeld, W.; Yoon, D.; Behl, Y.K.

    1994-05-01

    A Workshop on Large Scale Obsurcation and Related Climate Effects was held 29--31 January, 1992, in Albuquerque, New Mexico. The objectives of the workshop were: to determine through the use of expert judgement the current state of understanding of regional and global obscuration and related climate effects associated with nuclear weapons detonations; to estimate how large the uncertainties are in the parameters associated with these phenomena (given specific scenarios); to evaluate the impact of these uncertainties on obscuration predictions; and to develop an approach for the prioritization of further work on newly-available data sets to reduce the uncertainties. The workshop consisted of formal presentations by the 35 participants, and subsequent topical working sessions on: the source term; aerosol optical properties; atmospheric processes; and electro-optical systems performance and climatic impacts. Summaries of the conclusions reached in the working sessions are presented in the body of the report. Copies of the transparencies shown as part of each formal presentation are contained in the appendices (microfiche).

  12. Large scale electromechanical transistor with application in mass sensing

    SciTech Connect (OSTI)

    Jin, Leisheng; Li, Lijie

    2014-12-07

    Nanomechanical transistor (NMT) has evolved from the single electron transistor, a device that operates by shuttling electrons with a self-excited central conductor. The unfavoured aspects of the NMT are the complexity of the fabrication process and its signal processing unit, which could potentially be overcome by designing much larger devices. This paper reports a new design of large scale electromechanical transistor (LSEMT), still taking advantage of the principle of shuttling electrons. However, because of the large size, nonlinear electrostatic forces induced by the transistor itself are not sufficient to drive the mechanical member into vibration—an external force has to be used. In this paper, a LSEMT device is modelled, and its new application in mass sensing is postulated using two coupled mechanical cantilevers, with one of them being embedded in the transistor. The sensor is capable of detecting added mass using the eigenstate shifts method by reading the change of electrical current from the transistor, which has much higher sensitivity than conventional eigenfrequency shift approach used in classical cantilever based mass sensors. Numerical simulations are conducted to investigate the performance of the mass sensor.

  13. Bias in the Effective Field Theory of Large Scale Structures

    E-Print Network [OSTI]

    Leonardo Senatore

    2014-11-05

    We study how to describe collapsed objects, such as galaxies, in the context of the Effective Field Theory of Large Scale Structures. The overdensity of galaxies at a given location and time is determined by the initial tidal tensor, velocity gradients and spatial derivatives of the regions of dark matter that, during the evolution of the universe, ended up at that given location. Similarly to what recently done for dark matter, we show how this Lagrangian space description can be recovered by upgrading simpler Eulerian calculations. We describe the Eulerian theory. We show that it is perturbatively local in space, but non-local in time, and we explain the observational consequences of this fact. We give an argument for why to a certain degree of accuracy the theory can be considered as quasi time-local and explain what the operator structure is in this case. We describe renormalization of the bias coefficients so that, after this and after upgrading the Eulerian calculation to a Lagrangian one, the perturbative series for galaxies correlation functions results in a manifestly convergent expansion in powers of $k/k_{\\rm NL}$ and $k/k_{\\rm M}$, where $k$ is the wavenumber of interest, $k_{\\rm NL}$ is the wavenumber associated to the non-linear scale, and $k_{\\rm M}$ is the comoving wavenumber enclosing the mass of a galaxy.

  14. Large-Scale Magnetic Fields, Dark Energy and QCD

    E-Print Network [OSTI]

    Federico R. Urban; Ariel R. Zhitnitsky

    2010-08-20

    Cosmological magnetic fields are being observed with ever increasing correlation lengths, possibly reaching the size of superclusters, therefore disfavouring the conventional picture of generation through primordial seeds later amplified by galaxy-bound dynamo mechanisms. In this paper we put forward a fundamentally different approach that links such large-scale magnetic fields to the cosmological vacuum energy. In our scenario the dark energy is due to the Veneziano ghost (which solves the $U(1)_A$ problem in QCD). The Veneziano ghost couples through the triangle anomaly to the electromagnetic field with a constant which is unambiguously fixed in the standard model. While this interaction does not produce any physical effects in Minkowski space, it triggers the generation of a magnetic field in an expanding universe at every epoch. The induced energy of the magnetic field is thus proportional to cosmological vacuum energy: $\\rho_{EM}\\simeq B^2 \\simeq (\\frac{\\alpha}{4\\pi})^2 \\rho_{DE}$, $\\rho_{DE}$ hence acting as a source for the magnetic energy $\\rho_{EM}$. The corresponding numerical estimate leads to a magnitude in the nG range. There are two unique and distinctive predictions of our proposal: an uninterrupted active generation of Hubble size correlated magnetic fields throughout the evolution of the universe; the presence of parity violation on the enormous scales $1/H$, which apparently has been already observed in CMB. These predictions are entirely rooted into the standard model of particle physics.

  15. Importance-Truncated Large-Scale Shell Model

    E-Print Network [OSTI]

    Stumpf, Christina; Roth, Robert

    2015-01-01

    We propose an importance-truncation scheme for the large-scale nuclear shell model that extends its range of applicability to larger valence spaces and mid-shell nuclei. It is based on a perturbative measure for the importance of individual basis states that acts as an additional truncation for the many-body model space in which the eigenvalue problem of the Hamiltonian is solved numerically. Through a posteriori extrapolations of all observables to vanishing importance threshold, the full shell-model results can be recovered. In addition to simple threshold extrapolations, we explore extrapolations based on the energy variance. We apply the importance-truncated shell model for the study of 56-Ni in the pf valence space and of 60-Zn and 64-Ge in the pfg9/2 space. We demonstrate the efficiency and accuracy of the approach, which pave the way for future shell-model calculations in larger valence spaces with valence-space interactions derived in ab initio approaches.

  16. Large scale structures in gas-liquid mixture flows

    SciTech Connect (OSTI)

    Davis, M.R.; Fungtamasan, B.

    1984-12-01

    Relatively slow variations in mixture void fraction in gas-liquid mixture flows are indicated by low pass filter averaging. The slow void fluctuations are found to have a regular characteristic frequency or scale in the churn flow regime or near the boundary with the dispersed bubble flow regime. These regular disturbances develop inherently in a vertical pipe flow in strength and in size and are not due to the method of flow mixing. There was no evidence of distinctive gas slugs in the flow, and the structures were identified as large clouds of bubbles which moved faster than the average velocity, growing in size and strength as they moved with the flow. The magnitude of the voidage fluctuations in the churn flow regime was on average 57% of the value for a slug flow. The large scale bubble clouds convect coherently over relatively long distances a up to 1.45 times the mean mixture flow velocity at a gas volume flow fraction of 0.4. In the bubbl flow regime, the slow voidage variations were more random in scale and were only approx. 10% of the slug flow (maximum possible) value. However, even in the bubble flow regime, the disturbances convected coherently over relatively long distances at a velocity of approx. 1.1 time the mean mixture velocity.

  17. Large scale CMB anomalies from thawing cosmic strings

    E-Print Network [OSTI]

    Ringeval, Christophe; Yokoyama, Jun'ichi; Bouchet, Francois R

    2015-01-01

    Cosmic strings formed during inflation are expected to be either diluted over super-Hubble distances, i.e., invisible today, or to have crossed our past light cone very recently. We discuss the latter situation in which a few strings imprint their signature in the Cosmic Microwave Background (CMB) Anisotropies after recombination. Being almost frozen in the Hubble flow, these strings are quasi static and evade almost all of the previously derived constraints on their tension while being able to source large scale anisotropies in the CMB sky. Using a local variance estimator on thousand of numerically simulated Nambu-Goto all sky maps, we compute the expected signal and show that it can mimic a dipole modulation at large angular scales while being negligible at small angles. Interestingly, such a scenario generically produces one cold spot from the thawing of a cosmic string loop. Mixed with anisotropies of inflationary origin, we find that a few strings of tension GU = O(1) x 10^(-6) match the amplitude of th...

  18. Model Reduction of Large-Scale Dynamical A. Antoulas1

    E-Print Network [OSTI]

    Van Dooren, Paul

    , and structural response of high-rise buildings to wind and earthquakes), electronic circuit simulation systems in which real- time prognostics and prediction are required, constraints on compute power, memory response characteristics. Two main themes can be identified among several methodologies: (a) balancing

  19. Model Abstraction Techniques for Large-Scale Power Systems

    E-Print Network [OSTI]

    that lend themselves to assessment of the impact of wind energy. The first part of the re- port summarizes of Energy Office of Electricity Delivery and Energy Reliability Under Cooperative Agreement No. DE-FC26-06NT42847 Hawai`i Distributed Energy Resource Technologies for Energy Security Subtask 10.3 Deliverable 2

  20. QUIZ: Test your Wind Energy IQ | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report Appendices |Project Management|Energy PumpedWind Energy IQ

  1. PATHWAYS OF LARGE-SCALE MAGNETIC COUPLINGS BETWEEN SOLAR CORONAL EVENTS

    SciTech Connect (OSTI)

    Schrijver, Carolus J.; Title, Alan M.; DeRosa, Marc L.; Yeates, Anthony R.

    2013-08-20

    The high-cadence, comprehensive view of the solar corona by SDO/AIA shows many events that are widely separated in space while occurring close together in time. In some cases, sets of coronal events are evidently causally related, while in many other instances indirect evidence can be found. We present case studies to highlight a variety of coupling processes involved in coronal events. We find that physical linkages between events do occur, but concur with earlier studies that these couplings appear to be crucial to understanding the initiation of major eruptive or explosive phenomena relatively infrequently. We note that the post-eruption reconfiguration timescale of the large-scale corona, estimated from the extreme-ultraviolet afterglow, is on average longer than the mean time between coronal mass ejections (CMEs), so that many CMEs originate from a corona that is still adjusting from a previous event. We argue that the coronal field is intrinsically global: current systems build up over days to months, the relaxation after eruptions continues over many hours, and evolving connections easily span much of a hemisphere. This needs to be reflected in our modeling of the connections from the solar surface into the heliosphere to properly model the solar wind, its perturbations, and the generation and propagation of solar energetic particles. However, the large-scale field cannot be constructed reliably by currently available observational resources. We assess the potential of high-quality observations from beyond Earth's perspective and advanced global modeling to understand the couplings between coronal events in the context of CMEs and solar energetic particle events.

  2. Wind Program Announces $2 Million to Develop and Field Test Wind Energy Bat

    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:Financing ToolInternationalReport FY2014 -Energy Costs by IncreasingWholeWindAward | Department

  3. Wind Power: How Much, How Soon, and At What Cost?

    E-Print Network [OSTI]

    Wiser, Ryan H

    2010-01-01

    Evaluation of Global Wind Power." Journal of Geophysical2008. "The Economics of Wind Power with Energy Storage."Economics of Large-Scale Wind Power in a Carbon Constrained

  4. Dynamic analysis of a 5 megawatt offshore floating wind turbine

    E-Print Network [OSTI]

    Harriger, Evan Michael

    2011-01-01

    TU Delft and Siemens Wind Power, 2009. 7. Crossett, KristenRan. Large-Scale Offshore Wind Power in the United States:In fact, each GW of clean wind power eliminates 1.8 million

  5. Fully coupled dynamic analysis of a floating wind turbine system

    E-Print Network [OSTI]

    Withee, Jon E

    2004-01-01

    The use of wind power is in a period of rapid growth worldwide and wind energy systems have emerged as a promising technology for utilizing offshore wind resources for the large scale generation of electricity. Drawing ...

  6. Large-Scale Sequencing: The Future of Genomic Sciences Colloquium

    SciTech Connect (OSTI)

    Margaret Riley; Merry Buckley

    2009-01-01

    Genetic sequencing and the various molecular techniques it has enabled have revolutionized the field of microbiology. Examining and comparing the genetic sequences borne by microbes - including bacteria, archaea, viruses, and microbial eukaryotes - provides researchers insights into the processes microbes carry out, their pathogenic traits, and new ways to use microorganisms in medicine and manufacturing. Until recently, sequencing entire microbial genomes has been laborious and expensive, and the decision to sequence the genome of an organism was made on a case-by-case basis by individual researchers and funding agencies. Now, thanks to new technologies, the cost and effort of sequencing is within reach for even the smallest facilities, and the ability to sequence the genomes of a significant fraction of microbial life may be possible. The availability of numerous microbial genomes will enable unprecedented insights into microbial evolution, function, and physiology. However, the current ad hoc approach to gathering sequence data has resulted in an unbalanced and highly biased sampling of microbial diversity. A well-coordinated, large-scale effort to target the breadth and depth of microbial diversity would result in the greatest impact. The American Academy of Microbiology convened a colloquium to discuss the scientific benefits of engaging in a large-scale, taxonomically-based sequencing project. A group of individuals with expertise in microbiology, genomics, informatics, ecology, and evolution deliberated on the issues inherent in such an effort and generated a set of specific recommendations for how best to proceed. The vast majority of microbes are presently uncultured and, thus, pose significant challenges to such a taxonomically-based approach to sampling genome diversity. However, we have yet to even scratch the surface of the genomic diversity among cultured microbes. A coordinated sequencing effort of cultured organisms is an appropriate place to begin, since not only are their genomes available, but they are also accompanied by data on environment and physiology that can be used to understand the resulting data. As single cell isolation methods improve, there should be a shift toward incorporating uncultured organisms and communities into this effort. Efforts to sequence cultivated isolates should target characterized isolates from culture collections for which biochemical data are available, as well as other cultures of lasting value from personal collections. The genomes of type strains should be among the first targets for sequencing, but creative culture methods, novel cell isolation, and sorting methods would all be helpful in obtaining organisms we have not yet been able to cultivate for sequencing. The data that should be provided for strains targeted for sequencing will depend on the phylogenetic context of the organism and the amount of information available about its nearest relatives. Annotation is an important part of transforming genome sequences into useful resources, but it represents the most significant bottleneck to the field of comparative genomics right now and must be addressed. Furthermore, there is a need for more consistency in both annotation and achieving annotation data. As new annotation tools become available over time, re-annotation of genomes should be implemented, taking advantage of advancements in annotation techniques in order to capitalize on the genome sequences and increase both the societal and scientific benefit of genomics work. Given the proper resources, the knowledge and ability exist to be able to select model systems, some simple, some less so, and dissect them so that we may understand the processes and interactions at work in them. Colloquium participants suggest a five-pronged, coordinated initiative to exhaustively describe six different microbial ecosystems, designed to describe all the gene diversity, across genomes. In this effort, sequencing should be complemented by other experimental data, particularly transcriptomics and metabolomics data, all of which

  7. Large-Scale Data Challenges in Future Power Grids

    SciTech Connect (OSTI)

    Yin, Jian; Sharma, Poorva; Gorton, Ian; Akyol, Bora A.

    2013-03-25

    This paper describes technical challenges in supporting large-scale real-time data analysis for future power grid systems and discusses various design options to address these challenges. Even though the existing U.S. power grid has served the nation remarkably well over the last 120 years, big changes are in the horizon. The widespread deployment of renewable generation, smart grid controls, energy storage, plug-in hybrids, and new conducting materials will require fundamental changes in the operational concepts and principal components. The whole system becomes highly dynamic and needs constant adjustments based on real time data. Even though millions of sensors such as phase measurement units (PMUs) and smart meters are being widely deployed, a data layer that can support this amount of data in real time is needed. Unlike the data fabric in cloud services, the data layer for smart grids must address some unique challenges. This layer must be scalable to support millions of sensors and a large number of diverse applications and still provide real time guarantees. Moreover, the system needs to be highly reliable and highly secure because the power grid is a critical piece of infrastructure. No existing systems can satisfy all the requirements at the same time. We examine various design options. In particular, we explore the special characteristics of power grid data to meet both scalability and quality of service requirements. Our initial prototype can improve performance by orders of magnitude over existing general-purpose systems. The prototype was demonstrated with several use cases from PNNL’s FPGI and was shown to be able to integrate huge amount of data from a large number of sensors and a diverse set of applications.

  8. Large Scale Computing and Storage Requirements for Nuclear Physics Research

    SciTech Connect (OSTI)

    Gerber, Richard A.; Wasserman, Harvey J.

    2012-03-02

    IThe National Energy Research Scientific Computing Center (NERSC) is the primary computing center for the DOE Office of Science, serving approximately 4,000 users and hosting some 550 projects that involve nearly 700 codes for a wide variety of scientific disciplines. In addition to large-scale computing resources NERSC provides critical staff support and expertise to help scientists make the most efficient use of these resources to advance the scientific mission of the Office of Science. In May 2011, NERSC, DOE’s Office of Advanced Scientific Computing Research (ASCR) and DOE’s Office of Nuclear Physics (NP) held a workshop to characterize HPC requirements for NP research over the next three to five years. The effort is part of NERSC’s continuing involvement in anticipating future user needs and deploying necessary resources to meet these demands. The workshop revealed several key requirements, in addition to achieving its goal of characterizing NP computing. The key requirements include: 1. Larger allocations of computational resources at NERSC; 2. Visualization and analytics support; and 3. Support at NERSC for the unique needs of experimental nuclear physicists. This report expands upon these key points and adds others. The results are based upon representative samples, called “case studies,” of the needs of science teams within NP. The case studies were prepared by NP workshop participants and contain a summary of science goals, methods of solution, current and future computing requirements, and special software and support needs. Participants were also asked to describe their strategy for computing in the highly parallel, “multi-core” environment that is expected to dominate HPC architectures over the next few years. The report also includes a section with NERSC responses to the workshop findings. NERSC has many initiatives already underway that address key workshop findings and all of the action items are aligned with NERSC strategic plans.

  9. Large Scale Deployment of Renewables for Electricity Generation

    E-Print Network [OSTI]

    Neuhoff, Karsten

    2006-03-14

    is the most difficult to predict, but still has capacity factors in the 30 – 40% range. Geothermal is typically available 95% of the time over the productive life of the reservoir, usually 20 – 30 years. Wind, solar and wave intermittency can... conventional uranium reserves and resources of only about 20 million tonnes (this includes estimated resources at extraction costs up to $260/kg). 10 Initially, the production of solar PV cells was rather energy intensive. However, by 1999, rooftop-installed...

  10. EA-1792-S1: University of Maine's Deepwater Offshore Floating Wind Turbine Testing and Demonstration Project – Castine Harbor Test Site

    Broader source: Energy.gov [DOE]

    This Supplemental EA evaluates the environmental impacts of the University of Maine proposal to use Congressionally directed federal funding, from DOE, to deploy, test and retrieve one 1/8-scale floating wind turbine (20kw) prototype in Castine Harbor, offshore of Castine Maine. This test would be conducted prior to testing at the site 2 miles from Monhegan Island (evaluated under DOE EA-1792).

  11. The cosmic ray muon tomography facility based on large scale MRPC detector

    E-Print Network [OSTI]

    Xuewu Wang; Ming Zeng; Zhi Zeng; Yi Wang; Ziran Zhao; Xiaoguang Yue; Zhifei Luo; Hengguan Yi; Baihui Yu; Jianping Cheng

    2015-04-18

    Cosmic ray muon tomography is a novel technology to detect high-Z material. A prototype of TUMUTY with 73.6 cm x 73.6 cm large scale position sensitive MRPC detectors has been developed and is introduced in this paper. Three test kits have been tested and image is reconstructed using MAP algorithm. The reconstruction results show that the prototype is working well and the objects with complex structure and small size (20 mm) can be imaged on it, while the high-Z material is distinguishable from the low-Z one. This prototype provides a good platform for our further studies of the physical characteristics and the performances of cosmic ray muon tomography.

  12. Distortive Effects of Initial-Based Name Disambiguation on Measurements of Large-Scale Coauthorship Networks

    E-Print Network [OSTI]

    Kim, Jinseok

    2015-01-01

    Scholars have often relied on name initials to resolve name ambiguities in large-scale coauthorship network research. This approach bears the risk of incorrectly merging or splitting author identities. The use of initial-based disambiguation has been justified by the assumption that such errors would not affect research findings too much. This paper tests this assumption by analyzing coauthorship networks from five academic fields - biology, computer science, nanoscience, neuroscience, and physics - and an interdisciplinary journal, PNAS. Name instances in datasets of this study were disambiguated based on heuristics gained from previous algorithmic disambiguation solutions. We use disambiguated data as a proxy of ground-truth to test the performance of three types of initial-based disambiguation. Our results show that initial-based disambiguation can misrepresent statistical properties of coauthorship networks: it deflates the number of unique authors, number of component, average shortest paths, clustering ...

  13. Liberty Turbine Test Wind Farm | 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 APPENDIXsource History ViewInformationWinds JumpOxiranchem Inc Jump

  14. Cosmological implications of the CMB large-scale structure

    SciTech Connect (OSTI)

    Melia, Fulvio

    2015-01-01

    The Wilkinson Microwave Anisotropy Probe (WMAP) and Planck may have uncovered several anomalies in the full cosmic microwave background (CMB) sky that could indicate possible new physics driving the growth of density fluctuations in the early universe. These include an unusually low power at the largest scales and an apparent alignment of the quadrupole and octopole moments. In a ?CDM model where the CMB is described by a Gaussian Random Field, the quadrupole and octopole moments should be statistically independent. The emergence of these low probability features may simply be due to posterior selections from many such possible effects, whose occurrence would therefore not be as unlikely as one might naively infer. If this is not the case, however, and if these features are not due to effects such as foreground contamination, their combined statistical significance would be equal to the product of their individual significances. In the absence of such extraneous factors, and ignoring the biasing due to posterior selection, the missing large-angle correlations would have a probability as low as ?0.1% and the low-l multipole alignment would be unlikely at the ?4.9% level; under the least favorable conditions, their simultaneous observation in the context of the standard model could then be likely at only the ?0.005% level. In this paper, we explore the possibility that these features are indeed anomalous, and show that the corresponding probability of CMB multipole alignment in the R{sub h}=ct universe would then be ?7–10%, depending on the number of large-scale Sachs–Wolfe induced fluctuations. Since the low power at the largest spatial scales is reproduced in this cosmology without the need to invoke cosmic variance, the overall likelihood of observing both of these features in the CMB is ?7%, much more likely than in ?CDM, if the anomalies are real. The key physical ingredient responsible for this difference is the existence in the former of a maximum fluctuation size at the time of recombination, which is absent in the latter because of inflation.

  15. Large Scale Computing and Storage Requirements for High Energy Physics

    SciTech Connect (OSTI)

    Gerber, Richard A.; Wasserman, Harvey

    2010-11-24

    The National Energy Research Scientific Computing Center (NERSC) is the leading scientific computing facility for the Department of Energy's Office of Science, providing high-performance computing (HPC) resources to more than 3,000 researchers working on about 400 projects. NERSC provides large-scale computing resources and, crucially, the support and expertise needed for scientists to make effective use of them. In November 2009, NERSC, DOE's Office of Advanced Scientific Computing Research (ASCR), and DOE's Office of High Energy Physics (HEP) held a workshop to characterize the HPC resources needed at NERSC to support HEP research through the next three to five years. The effort is part of NERSC's legacy of anticipating users needs and deploying resources to meet those demands. The workshop revealed several key points, in addition to achieving its goal of collecting and characterizing computing requirements. The chief findings: (1) Science teams need access to a significant increase in computational resources to meet their research goals; (2) Research teams need to be able to read, write, transfer, store online, archive, analyze, and share huge volumes of data; (3) Science teams need guidance and support to implement their codes on future architectures; and (4) Projects need predictable, rapid turnaround of their computational jobs to meet mission-critical time constraints. This report expands upon these key points and includes others. It also presents a number of case studies as representative of the research conducted within HEP. Workshop participants were asked to codify their requirements in this case study format, summarizing their science goals, methods of solution, current and three-to-five year computing requirements, and software and support needs. Participants were also asked to describe their strategy for computing in the highly parallel, multi-core environment that is expected to dominate HPC architectures over the next few years. The report includes a section that describes efforts already underway or planned at NERSC that address requirements collected at the workshop. NERSC has many initiatives in progress that address key workshop findings and are aligned with NERSC's strategic plans.

  16. Implementation of a Biaxial Resonant Fatigue Test Method on a Large Wind Turbine Blade

    SciTech Connect (OSTI)

    Snowberg, D.; Dana, S.; Hughes, S.; Berling, P.

    2014-09-01

    A biaxial resonant test method was utilized to simultaneously fatigue test a wind turbine blade in the flap and edge (lead-lag) direction. Biaxial resonant blade fatigue testing is an accelerated life test method utilizing oscillating masses on the blade; each mass is independently oscillated at the respective flap and edge blade resonant frequency. The flap and edge resonant frequency were not controlled, nor were they constant for this demonstrated test method. This biaxial resonant test method presented surmountable challenges in test setup simulation, control and data processing. Biaxial resonant testing has the potential to complete test projects faster than single-axis testing. The load modulation during a biaxial resonant test may necessitate periodic load application above targets or higher applied test cycles.

  17. Modal testing of a very flexible 110 m wind turbine structure

    SciTech Connect (OSTI)

    Carne, T.G.; Lauffer, J.P.; Gomez, A.J.; Benjannet, Hassine

    1988-01-01

    Modal Testing of immense and very flexible structures poses a number of problems. It requires innovative excitation techniques since the modal frequencies of these stuctures can be quite low. Also, substantial energy must be input to the structure to obtain reasonable levels of response. In this paper, results are presented from a modal test of the 110 m tall EOLE wind turbine which had four modal frequencies below 1.0 Hz. Step-relaxation and wind were used to excite the structure. 5 refs., 14 figs., 2 tabs.

  18. A review of large-scale LNG spills : experiment and modeling.

    SciTech Connect (OSTI)

    Luketa-Hanlin, Anay Josephine

    2005-04-01

    The prediction of the possible hazards associated with the storage and transportation of liquefied natural gas (LNG) by ship has motivated a substantial number of experimental and analytical studies. This paper reviews the experimental and analytical work performed to date on large-scale spills of LNG. Specifically, experiments on the dispersion of LNG, as well as experiments of LNG fires from spills on water and land are reviewed. Explosion, pool boiling, and rapid phase transition (RPT) explosion studies are described and discussed, as well as models used to predict dispersion and thermal hazard distances. Although there have been significant advances in understanding the behavior of LNG spills, technical knowledge gaps to improve hazard prediction are identified. Some of these gaps can be addressed with current modeling and testing capabilities. A discussion of the state of knowledge and recommendations to further improve the understanding of the behavior of LNG spills on water is provided.

  19. Large Scale Structure Formation in Eddington-inspired Born-Infeld Gravity

    E-Print Network [OSTI]

    Xiao-Long Du; Ke Yang; Xin-He Meng; Yu-Xiao Liu

    2014-08-18

    We study the large scale structure formation in Eddington-inspired Born-Infeld (EiBI) gravity. It is found that the linear growth of scalar perturbations in EiBI gravity deviates from that in general relativity for modes with large wave numbers ($k$), but the deviation is largely suppressed with the expansion of the Universe. We investigate the integrated Sachs-Wolfe effect in EiBI gravity, and find that its effect on the angular power spectrum of the anisotropy of the cosmic microwave background (CMB) is almost the same as that in the Lambda-cold dark matter ($\\Lambda$CDM) model. We further calculate the linear matter power spectrum in EiBI gravity and compare it with that in the $\\Lambda$CDM model. Deviation is found on small scales ($k\\gtrsim 0.1 h$ Mpc$^{-1}$), which can be tested in the future by observations from galaxy surveys.

  20. Small- and Large-scale Characterization and Mixing Properties in a Thermally Driven Thin Liquid Film

    E-Print Network [OSTI]

    Michael Winkler; Markus Abel

    2015-07-28

    Thin liquid films are nanoscopic elements of foams, emulsions and suspensions, and form a paradigm for nanochannel transport that eventually test the limits of hydrodynamic descriptions. Here we use classical dynamical systems characteristics to study the complex interplay of thermal convection, interface and gravitational forces which yields turbulent mixing and transport: Lyapunov exponents and entropies. We induce a stable two eddy convection in an extremely thin liquid film by applying a temperature gradient. Experimentally, we determine the small-scale dynamics using the motion and deformation of spots of equal size/equal color, we dubbed that technique "color imaging velocimetry". The large-scale dynamics is captured by encoding the left/right motion of the liquid directed to the left or right of the separatrix between the two rolls. This way, we characterize chaos of course mixing in this peculiar fluid geometry of a thin, free-standing liquid film.

  1. How CMB and large-scale structure constrain chameleon interacting dark energy

    E-Print Network [OSTI]

    Daniel Boriero; Subinoy Das; Yvonne Y. Y. Wong

    2015-05-12

    We explore a chameleon type of interacting dark matter-dark energy scenario in which a scalar field adiabatically traces the minimum of an effective potential sourced by the dark matter density. We discuss extensively the effect of this coupling on cosmological observables, especially the parameter degeneracies expected to arise between the model parameters and other cosmological parameters, and then test the model against observations of the cosmic microwave background (CMB) anisotropies and other cosmological probes. We find that the chameleon parameters $\\alpha$ and $\\beta$, which determine respectively the slope of the scalar field potential and the dark matter-dark energy coupling strength, can be constrained to $\\alpha radiation component, despite a passing similarity between the two scenarios in that they both delay the epoch of matter-radiation equality. Based on the derived parameter constraints, we discuss possible signatures of the model for ongoing and future large-scale structure surveys.

  2. Large Scale Computing and Storage Requirements for Nuclear Physics Research

    E-Print Network [OSTI]

    Gerber, Richard A.

    2012-01-01

    in the process of thermonuclear incineration of theircore-collapse and thermonuclear events to test predictionsprocesses. In contrast to thermonuclear supernova modeling,

  3. Large-Scale Production of Marine Microalgae for Fuel and Feeds

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

    Review Large-Scale Production of Marine Microalgae for Fuel and Feeds March 24, 2015 Algae Platform Review Mark Huntley Cornell Marine Algal Biofuels Consortium This...

  4. A Tractable Approach to Understanding the Results from Large-Scale 3D Transient

    E-Print Network [OSTI]

    Peraire, Jaime

    ) problems or NASA's HPCC (High Performance Computing & Communication) grand challenges, can easily. Introduction Large-scale simulations of physical phenomena on high performance computing systems (often on mas

  5. Asymmetry in In-Degree and Out-Degree Distributions of Large-Scale Industrial Networks

    E-Print Network [OSTI]

    Luo, Jianxi; Whitney, Daniel E.

    2015-01-01

    Network structures in industrial pricing: the effect ofrecession? ranking U.S. industrial sectors by the Power-of-distributions of large-scale industrial networks Jianxi Luo

  6. Best Practices and Tools for Large-scale Deployment of Renewable...

    Open Energy Info (EERE)

    Best Practices and Tools for Large-scale Deployment of Renewable Energy and Energy Efficiency Techniques Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Best Practices...

  7. A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion

    E-Print Network [OSTI]

    Bremer, Peer-Timo

    2010-01-01

    comparison of terascale combustion simulation data. Mathe-premixed hydrogen ?ames. Combustion and Flame, [7] J. L.of Large Scale Turbulent Combustion Peer-Timo Bremer 1 ,

  8. Parallel I/O Software Infrastructure for Large-Scale Systems

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

    Systems Parallel IO Software Infrastructure for Large-Scale Systems | Tags: Math & Computer Science Choudhary.png An illustration of how MPI---IO file domain alignment...

  9. In-situ sampling of a large-scale particle simulation for interactive...

    Office of Scientific and Technical Information (OSTI)

    random sampling of data from large scale particle simulations, such as the Roadrunner Universe MCsup 3 cosmological simulation, to be used for interactive post-analysis and...

  10. NESC-VII: Fracture Mechanics Analyses of WPS Experiments on Large-scale Cruciform Specimen

    SciTech Connect (OSTI)

    Yin, Shengjun [ORNL; Williams, Paul T [ORNL; Bass, Bennett Richard [ORNL

    2011-01-01

    This paper describes numerical analyses performed to simulate warm pre-stress (WPS) experiments conducted with large-scale cruciform specimens within the Network for Evaluation of Structural Components (NESC-VII) project. NESC-VII is a European cooperative action in support of WPS application in reactor pressure vessel (RPV) integrity assessment. The project aims in evaluation of the influence of WPS when assessing the structural integrity of RPVs. Advanced fracture mechanics models will be developed and performed to validate experiments concerning the effect of different WPS scenarios on RPV components. The Oak Ridge National Laboratory (ORNL), USA contributes to the Work Package-2 (Analyses of WPS experiments) within the NESCVII network. A series of WPS type experiments on large-scale cruciform specimens have been conducted at CEA Saclay, France, within the framework of NESC VII project. This paper first describes NESC-VII feasibility test analyses conducted at ORNL. Very good agreement was achieved between AREVA NP SAS and ORNL. Further analyses were conducted to evaluate the NESC-VII WPS tests conducted under Load-Cool-Transient- Fracture (LCTF) and Load-Cool-Fracture (LCF) conditions. This objective of this work is to provide a definitive quantification of WPS effects when assessing the structural integrity of reactor pressure vessels. This information will be utilized to further validate, refine, and improve the WPS models that are being used in probabilistic fracture mechanics computer codes now in use by the NRC staff in their effort to develop risk-informed updates to Title 10 of the U.S. Code of Federal Regulations (CFR), Part 50, Appendix G.

  11. New Superconducting Magnet Will Lead to Next Generation of Wind...

    Energy Savers [EERE]

    DOE funded AML's design for a superconducting generator for large-scale, high-efficiency offshore wind turbines. AML worked with its partners, Emerson Electric Corporation, Creare...

  12. Small Wind Turbine Testing Results from the National Renewable Energy Laboratory: Preprint

    SciTech Connect (OSTI)

    Bowen, A.; Huskey, A.; Link, H.; Sinclair, K.; Forsyth, T.; Jager, D.; van Dam, J.; Smith, J.

    2010-04-01

    In 2008, the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) began testing small wind turbines (SWTs) through the Independent Testing project. Using competitive solicitation, five SWTs were selected for testing at the National Wind Technology Center (NWTC). NREL's NWTC is accredited by the American Association of Laboratory Accreditation (A2LA) to conduct duration, power performance, safety and function, power quality, and noise tests to International Electrotechnical Commission (IEC) standards. Results of the tests conducted on each of the SWTs are or will be available to the public on the NREL website. The results could be used by their manufacturers in the certification of the turbines or state agencies to decide which turbines are eligible for state incentives.

  13. A framework for delay emulation of large-scale internetworks 

    E-Print Network [OSTI]

    Venkata, Shravan Rangaraju

    2001-01-01

    Several network applications require access to a large number of geographically distributed machines for testing and debugging purposes. Typically, it is the case that either access is not available for so many machines, ...

  14. Aalborg Universitet Methodologies for Wind Turbine and STATCOM Integration in Wind Power Plant

    E-Print Network [OSTI]

    Bak, Claus Leth

    Aalborg Universitet Methodologies for Wind Turbine and STATCOM Integration in Wind Power Plant Integration in Wind Power Plant Models for Harmonic Resonances Assessment. In Proceedings of the 14th Wind Integration Workshop: International Workshop on Large-Scale Integration of Wind Power into Power Systems

  15. 14th Annual international meeting of wind turbine test stations: Proceedings

    SciTech Connect (OSTI)

    Not Available

    1994-11-01

    These proceedings are of the 14th Annual International Meeting of Test Stations. As the original charter states these meetings are intended to be an international forum for sharing wind turbine testing experiences. By sharing their experiences they can improve testing skills and techniques. As with all new industries the quality of the products is marked by how well they learn from their experiences and incorporate this learning into the next generation of products. The test station`s role in this process is to provide accurate information to the companies they serve. This information is used by designers to conform and improve their designs. It is also used by certification agencies for confirming the quality of these designs. By sharing of experiences they are able to accomplished these goals, serve these customers better and ultimately improve the international wind energy industry.

  16. Harvesting Clean Energy How California Can Deploy Large-Scale Renewable

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Harvesting Clean Energy How California Can Deploy Large-Scale Renewable Energy Projects Harvesting Clean Energy: How California Can Deploy Large-Scale Renewable Energy Projects on Appropriate acres of impaired lands in the Westlands Water District in the Central Valley may soon have

  17. Large-Scale Trends in the Evolution of Gene Structures within 11 Animal Genomes

    E-Print Network [OSTI]

    Yandell, Mark

    Large-Scale Trends in the Evolution of Gene Structures within 11 Animal Genomes Mark Yandell1,2,3¤a-source software library called CGL (for ``Comparative Genomics Library''). Our results demonstrate that change. Citation: Yandell M, Mungall CJ, Smith C, Prochnik S, Kaminker J, et al (2006) Large-scale trends

  18. Scheduling of large scale crude oil blending Felipe Diaz-Alvarado1, Francisco Trespalacios2,

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    Scheduling of large scale crude oil blending Felipe D´iaz-Alvarado1, Francisco Trespalacios2, 30 (4): 614-634. D´iaz-Alvarado, Trespalacios, Grossmann Scheduling of large scale crude oil blending, P. A Novel Priority-Slot Based Continuous-Time Formulation for Crude-Oil Scheduling Problems

  19. Towards Automatic Incorporation of Search engines into a Large-Scale Metasearch Engine

    E-Print Network [OSTI]

    Meng, Weiyi

    Towards Automatic Incorporation of Search engines into a Large-Scale Metasearch Engine Zonghuan Wu. of Computer Science Univ. of Illinois at Chicago yu@cs.uic.edu Abstract A metasearch engine supports unified access to multiple component search engines. To build a very large-scale metasearch engine that can

  20. Reconfiguration-Assisted Charging in Large-Scale Lithium-ion Battery Systems

    E-Print Network [OSTI]

    Reconfiguration-Assisted Charging in Large-Scale Lithium-ion Battery Systems Liang He1 , Linghe, TX, USA ABSTRACT Large-scale Lithium-ion batteries are widely adopted in many systems and heterogeneous discharging con- ditions, cells in the battery system may have differ- ent statuses

  1. Electronic Properties of Large-scale Graphene Films Chemical Vapor Synthesized on Nickel and on Copper

    E-Print Network [OSTI]

    Chen, Yong P.

    transport properties of graphene films grown on Ni and Cu. Sample Preparation The synthesis of graphene film1 Electronic Properties of Large-scale Graphene Films Chemical Vapor Synthesized on Nickel of large scale graphene films grown by chemical vapor synthesis on Ni and Cu, and then transferred to SiO2

  2. U.S. Energy Infrastructure Investment: Large-Scale Integrated Smart Grid

    E-Print Network [OSTI]

    U.S. Energy Infrastructure Investment: Large-Scale Integrated Smart Grid Solutions with High: LargeScale Integrated Smart Grid Solutions with High Penetration of Renewable Resources, Dispersed- ing electricity grid. Much attention is being given to smart grid development in the U.S. and around

  3. Monte Carlo Adaptive Technique for Sensitivity Analysis of a Large-scale Air Pollution Model

    E-Print Network [OSTI]

    Dimov, Ivan

    Monte Carlo Adaptive Technique for Sensitivity Analysis of a Large-scale Air Pollution Model Ivan of input parameters contribution into output variability of a large- scale air pollution model]. This model simulates the transport of air pollutants and has been developed by Dr. Z. Zlatev and his

  4. QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web

    E-Print Network [OSTI]

    Liu, Ling

    1 QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web James data preparation technique for large scale data analysis of the Deep Web. To support QA the Deep Web. Two unique features of the Thor framework are (1) the novel page clustering for grouping

  5. QA-Pagelet: Data Preparation Techniques for Large-Scale Data Analysis of the Deep Web

    E-Print Network [OSTI]

    Caverlee, James

    QA-Pagelet: Data Preparation Techniques for Large-Scale Data Analysis of the Deep Web James the QA-Pagelet as a fundamental data preparation technique for large-scale data analysis of the Deep Web-Pagelets from the Deep Web. Two unique features of the Thor framework are 1) the novel page clustering

  6. Experimental Investigation on Rapid Filling of a Large-Scale Pipeline

    E-Print Network [OSTI]

    Tijsseling, A.S.

    ; Unsteady flow; Two-phase flow; Air­water interface; Flow-regime transition. Introduction Rapid pipe filling experiments of the two-phase pressurized flow behavior during the rapid filling of a large-scale pipelineExperimental Investigation on Rapid Filling of a Large-Scale Pipeline Qingzhi Hou1 ; Arris S

  7. LETTER doi:10.1038/nature11727 Large-scale nanophotonic phased array

    E-Print Network [OSTI]

    Reif, Rafael

    and astronomy1 . The ability to generate arbi- trary radiation patterns with large-scale phased arrays has long been pursued. Although it is extremely expensive and cumbersome to deploy large-scale radiofrequency of the nanoantennas pre- cisely balanced in power and aligned in phase to generate a designed, sophisticated radiation

  8. Parallel domain decomposition for simulation of large-scale power grids

    E-Print Network [OSTI]

    Mohanram, Kartik

    of large-scale linear circuits such as power grids. DD techniques that use non-overlapping and overlap that with the proposed parallel DD framework, existing linear circuit simulators can be extended to handle large- scale can be solved independently in parallel using standard techniques for linear system analysis

  9. Passive scalar in a large-scale velocity field I. Kolokolov

    E-Print Network [OSTI]

    Lebedev, Vladimir

    Passive scalar in a large-scale velocity field I. Kolokolov Budker Institute of Nuclear Physics advection of a passive scalar (t,r) by an incompressible large-scale turbulent flow. In the framework of and for the passive scalar difference (r1) (r2) for separations r1 r2 lying in the convective interval are found

  10. An Occupied Subspace Optimization for Linear Scaling in LargeScale Ab Initio Electronic

    E-Print Network [OSTI]

    Raczkowski, David

    1 CONTENTS An Occupied Subspace Optimization for Linear Scaling in Large­Scale Ab Initio Electronic 2000 Physics An Occupied Subspace Optimization for Linear Scaling in Large Scale Ab Initio Electronic Structure Calculations Abstract We present an approach to electronic structure calcu­ lations that replaces

  11. Linear Algebraic Calculation of Green's function for Large-Scale Electronic Structure Theory

    E-Print Network [OSTI]

    Hoshi, Takeo

    Linear Algebraic Calculation of Green's function for Large-Scale Electronic Structure Theory R (Dated: March 2, 2006) A linear algebraic method named the shifted conjugate-orthogonal-conjugate-gradient method is introduced for large-scale electronic structure calculation. The method gives an iterative

  12. Type-Preserving Compilation for Large-Scale Optimizing Object-Oriented Compilers

    E-Print Network [OSTI]

    California at Berkeley, University of

    Type-Preserving Compilation for Large-Scale Optimizing Object-Oriented Compilers Juan Chen Chris polyvios@cs.umd.edu Abstract Type-preserving compilers translate well-typed source code, such as Java or C- mentation of type-preserving compilation in a complex, large-scale optimizing compiler. Compared to prior

  13. Platforms and Real Options in Large-Scale Engineering Konstantinos Kalligeros

    E-Print Network [OSTI]

    de Weck, Olivier L.

    Platforms and Real Options in Large-Scale Engineering Systems by Konstantinos Kalligeros Dipl teams to assess the value of real options in programs of large-scale, partially stan- dardized systems. A novel valuation process is introduced to value the developer's real options to choose among

  14. AMP: An Affinity-based Metadata Prefetching Scheme in Large-Scale Distributed Storage Systems

    E-Print Network [OSTI]

    Zhu, Yifeng

    1 AMP: An Affinity-based Metadata Prefetching Scheme in Large-Scale Distributed Storage Systems Lin significantly reduce access latency for I/O systems. In distributed storage systems, prefetching for metadata Prefetching (AMP) scheme is proposed for metadata servers in large-scale distributed storage systems

  15. Role of large-scale soil structure in organic carbon turnover: Evidence from California grassland soils

    E-Print Network [OSTI]

    Role of large-scale soil structure in organic carbon turnover: Evidence from California grassland soils Stephanie A. Ewing,1 Jonathan Sanderman,1 W. Troy Baisden,2 Yang Wang,3 and Ronald Amundson1 characterized the effect of large-scale (>20 mm) soil physical structure on the age and recalcitrance of soil

  16. An Energy-Efficient Framework for Large-Scale Parallel Storage Systems

    E-Print Network [OSTI]

    Qin, Xiao

    An Energy-Efficient Framework for Large-Scale Parallel Storage Systems Ziliang Zong, Matt Briggs-scale and energy-efficient parallel storage systems. To validate the efficiency of the proposed framework, a buffer that this new framework can significantly improves the energy efficiency of large-scale parallel storage systems

  17. Phoenix Rebirth: Scalable MapReduce on a Large-Scale Shared-Memory System

    E-Print Network [OSTI]

    Kozyrakis, Christos

    Phoenix Rebirth: Scalable MapReduce on a Large-Scale Shared-Memory System Richard M. Yoo, Anthony for large-scale, shared-memory systems can be challenging. This work optimizes Phoenix, a MapReduce runtime for clusters and CMP systems [5]­[8]. This work focuses on Phoenix [5], a MapReduce imple- mentation for shared

  18. Disentangling the Multiple Sources of Large-Scale Variability in Australian Wintertime Precipitation

    E-Print Network [OSTI]

    Sherwood, Steven

    Precipitation PENELOPE MAHER AND STEVEN C. SHERWOOD Climate Change Research Centre and ARC Centre of Excellence received 25 October 2013, in final form 4 March 2014) ABSTRACT Precipitation is influenced by multiple large-scale natural processes. Many of these large-scale precipitation ``drivers'' are not independent

  19. Hurricane Activity and the Large-Scale Pattern of Spread of an Invasive Plant Species

    E-Print Network [OSTI]

    Cronin, James T.

    Hurricane Activity and the Large-Scale Pattern of Spread of an Invasive Plant Species Ganesh P of invasive species. However, the effects of large-scale disturbances, such as hurricanes and tropical storms. australis stands expanded in size by 6­35% per year. Based on tropical storm and hurricane activity over

  20. LARGE SCALE PERMEABILITY TEST OF THE GRANITE IN THE STRIPA MINE AND THERMAL CONDUCTIVITY TEST

    E-Print Network [OSTI]

    Lundstrom, L.

    2011-01-01

    KBS (Swedish Nuclear Fuel Safety Program) -"~ __- L_ _ _ ~-.KBS (SWe:1ish Nuclear Fuel Safety Program) Reprinte:1 by

  1. A Large Scale Double Beta and Dark Matter Experiment: GENIUS

    E-Print Network [OSTI]

    J. Hellmig; H. V. Klapdor-Kleingrothaus

    1998-01-21

    The recent results from the HEIDELBERG-MOSCOW experiment have demonstrated the large potential of double beta decay to search for new physics beyond the Standard Model. To increase by a major step the present sensitivity for double beta decay and dark matter search much bigger source strengths and much lower backgrounds are needed than used in experiments under operation at present or under construction. We present here a study of a project proposed recently, which would operate one ton of 'naked' enriched GErmanium-detectors in liquid NItrogen as shielding in an Underground Setup (GENIUS). It improves the sensitivity to neutrino masses to 0.01 eV. A ten ton version would probe neutrino masses even down to 10^-3 eV. The first version would allow to test the atmospheric neutrino problem, the second at least part of the solar neutrino problem. Both versions would allow in addition significant contributions to testing several classes of GUT models. These are especially tests of R-parity breaking supersymmetry models, leptoquark masses and mechanism and right-handed W-boson masses comparable to LHC. The second issue of the experiment is the search for dark matter in the universe. The entire MSSM parameter space for prediction of neutralinos as dark matter particles could be covered already in a first step of the full experiment - with the same purity requirements but using only 100 kg of 76Ge or even of natural Ge - making the experiment competitive to LHC in the search for supersymmetry. The layout of the proposed experiment is discussed and the shielding and purity requirements are studied using GEANT Monte Carlo simulations. As a demonstration of the feasibility of the experiment first results of operating a 'naked' Ge detector in liquid nitrogen are presented.

  2. Large-Scale Hybrid Dynamic Simulation Employing Field Measurements

    SciTech Connect (OSTI)

    Huang, Zhenyu; Guttromson, Ross T.; Hauer, John F.

    2004-06-30

    Simulation and measurements are two primary ways for power engineers to gain understanding of system behaviors and thus accomplish tasks in system planning and operation. Many well-developed simulation tools are available in today's market. On the other hand, large amount of measured data can be obtained from traditional SCADA systems and currently fast growing phasor networks. However, simulation and measurement are still two separate worlds. There is a need to combine the advantages of simulation and measurements. In view of this, this paper proposes the concept of hybrid dynamic simulation which opens up traditional simulation by providing entries for measurements. A method is presented to implement hybrid simulation with PSLF/PSDS. Test studies show the validity of the proposed hybrid simulation method. Applications of such hybrid simulation include system event playback, model validation, and software validation.

  3. Large-scale seismic signal analysis with Hadoop

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

    Addair, T. G.; Dodge, D. A.; Walter, W. R.; Ruppert, S. D.

    2014-05-01

    In seismology, waveform cross correlation has been used for years to produce high-precision hypocenter locations and for sensitive detectors. Because correlated seismograms generally are found only at small hypocenter separation distances, correlation detectors have historically been reserved for spotlight purposes. However, many regions have been found to produce large numbers of correlated seismograms, and there is growing interest in building next-generation pipelines that employ correlation as a core part of their operation. In an effort to better understand the distribution and behavior of correlated seismic events, we have cross correlated a global dataset consisting of over 300 million seismograms. Thismore »was done using a conventional distributed cluster, and required 42 days. In anticipation of processing much larger datasets, we have re-architected the system to run as a series of MapReduce jobs on a Hadoop cluster. In doing so we achieved a factor of 19 performance increase on a test dataset. We found that fundamental algorithmic transformations were required to achieve the maximum performance increase. Whereas in the original IO-bound implementation, we went to great lengths to minimize IO, in the Hadoop implementation where IO is cheap, we were able to greatly increase the parallelism of our algorithms by performing a tiered series of very fine-grained (highly parallelizable) transformations on the data. Each of these MapReduce jobs required reading and writing large amounts of data.« less

  4. Design advanced for large-scale, economic, floating LNG plant

    SciTech Connect (OSTI)

    Naklie, M.M.

    1997-06-30

    A floating LNG plant design has been developed which is technically feasible, economical, safe, and reliable. This technology will allow monetization of small marginal fields and improve the economics of large fields. Mobil`s world-scale plant design has a capacity of 6 million tons/year of LNG and up to 55,000 b/d condensate produced from 1 bcfd of feed gas. The plant would be located on a large, secure, concrete barge with a central moonpool. LNG storage is provided for 250,000 cu m and condensate storage for 650,000 bbl. And both products are off-loaded from the barge. Model tests have verified the stability of the barge structure: barge motions are low enough to permit the plant to continue operation in a 100-year storm in the Pacific Rim. Moreover, the barge is spread-moored, eliminating the need for a turret and swivel. Because the design is generic, the plant can process a wide variety of feed gases and operate in different environments, should the plant be relocated. This capability potentially gives the plant investment a much longer project life because its use is not limited to the life of only one producing area.

  5. Optimal pump selection for large-scale irrigation systems

    SciTech Connect (OSTI)

    Buchleiter, G.W.

    1986-01-01

    A general computer program was developed to provide recommendations for improving the water and energy management on a branched irrigation distribution pipeline network with a single source and multiple pump stations. The program has three main parts: (1) irrigation scheduling, (2) hydraulic model for the determination of head and flow requirements for any desired irrigation schedule, and (3) optimal pump selection that supplies the head and flow requirements. Irrigation scheduling provides recommendations for irrigating each field served by the distribution network. The hydraulic model calculates the flow and head required at each pump station to satisfy any irrigation schedule desired by the user. The pump-selection algorithm recommends the pump combination at each pump station, which gives the lowest total energy cost for the farm. The program was field tested on a 4850 ha. farm in north central Oregon for two irrigation seasons. Preliminary estimates indicate that energy costs can be reduced by at least 20% by operating the most economical pump combinations. Additional savings are possible by applying only the water required by the crop, by rearranging irrigation schedules to reduce peak electrical demands, and taking advantage of lower electrical-demand charges during off-peak time periods.

  6. Uncertainty quantification for large-scale ocean circulation predictions.

    SciTech Connect (OSTI)

    Safta, Cosmin; Debusschere, Bert J.; Najm, Habib N.; Sargsyan, Khachik

    2010-09-01

    Uncertainty quantificatio in climate models is challenged by the sparsity of the available climate data due to the high computational cost of the model runs. Another feature that prevents classical uncertainty analyses from being easily applicable is the bifurcative behavior in the climate data with respect to certain parameters. A typical example is the Meridional Overturning Circulation in the Atlantic Ocean. The maximum overturning stream function exhibits discontinuity across a curve in the space of two uncertain parameters, namely climate sensitivity and CO{sub 2} forcing. We develop a methodology that performs uncertainty quantificatio in the presence of limited data that have discontinuous character. Our approach is two-fold. First we detect the discontinuity location with a Bayesian inference, thus obtaining a probabilistic representation of the discontinuity curve location in presence of arbitrarily distributed input parameter values. Furthermore, we developed a spectral approach that relies on Polynomial Chaos (PC) expansions on each sides of the discontinuity curve leading to an averaged-PC representation of the forward model that allows efficient uncertainty quantification and propagation. The methodology is tested on synthetic examples of discontinuous data with adjustable sharpness and structure.

  7. IFT&E Industry Report Wind Turbine-Radar Interference Test Summary.

    SciTech Connect (OSTI)

    Karlson, Benjamin; LeBlanc, Bruce Philip; Minster, David G; Estill, Milford; Miller, Bryan Edward; Busse, Franz; Keck, Chris; Sullivan, Jonathan; Brigada, David; Parker, Lorri; Younger, Richard; Biddle, Jason

    2014-10-01

    Wind turbines have grown in size and capacity with today's average turbine having a power capacity of around 1.9 MW, reaching to heights of over 495 feet from ground to blade tip, and operating with speeds at the tip of the blade up to 200 knots. When these machines are installed within the line-of-sight of a radar system, they can cause significant clutter and interference, detrimentally impacting the primary surveillance radar (PSR) performance. The Massachusetts Institute of Technology's Lincoln Laboratory (MIT LL) and Sandia National Laboratories (SNL) were co-funded to conduct field tests and evaluations over two years in order to: I. Characterize the impact of wind turbines on existing Program-of-Record (POR) air surveillance radars; II. Assess near-term technologies proposed by industry that have the potential to mitigate the interference from wind turbines on radar systems; and III. Collect data and increase technical understanding of interference issues to advance development of long-term mitigation strategies. MIT LL and SNL managed the tests and evaluated resulting data from three flight campaigns to test eight mitigation technologies on terminal (short) and long-range (60 nmi and 250 nmi) radar systems. Combined across the three flight campaigns, more than 460 of hours of flight time were logged. This paper summarizes the Interagency Field Test & Evaluation (IFT&E) program and publicly- available results from the tests. It will also discuss the current wind turbine-radar interference evaluation process within the government and a proposed process to deploy mitigation technologies.

  8. Multilevel method for modeling large-scale networks.

    SciTech Connect (OSTI)

    Safro, I. M. (Mathematics and Computer Science)

    2012-02-24

    Understanding the behavior of real complex networks is of great theoretical and practical significance. It includes developing accurate artificial models whose topological properties are similar to the real networks, generating the artificial networks at different scales under special conditions, investigating a network dynamics, reconstructing missing data, predicting network response, detecting anomalies and other tasks. Network generation, reconstruction, and prediction of its future topology are central issues of this field. In this project, we address the questions related to the understanding of the network modeling, investigating its structure and properties, and generating artificial networks. Most of the modern network generation methods are based either on various random graph models (reinforced by a set of properties such as power law distribution of node degrees, graph diameter, and number of triangles) or on the principle of replicating an existing model with elements of randomization such as R-MAT generator and Kronecker product modeling. Hierarchical models operate at different levels of network hierarchy but with the same finest elements of the network. However, in many cases the methods that include randomization and replication elements on the finest relationships between network nodes and modeling that addresses the problem of preserving a set of simplified properties do not fit accurately enough the real networks. Among the unsatisfactory features are numerically inadequate results, non-stability of algorithms on real (artificial) data, that have been tested on artificial (real) data, and incorrect behavior at different scales. One reason is that randomization and replication of existing structures can create conflicts between fine and coarse scales of the real network geometry. Moreover, the randomization and satisfying of some attribute at the same time can abolish those topological attributes that have been undefined or hidden from researchers. We propose to develop multilevel methods to model complex networks. The key point of the proposed strategy is that it will help to preserve part of the unknown structural attributes by guaranteeing the similar behavior of the real and artificial model on different scales.

  9. Aquifer sensitivity assessment modeling at a large scale

    SciTech Connect (OSTI)

    Berg, R.C.; Abert, C.C. (Illinois State Geological Survey, Champaign, IL (United States))

    1994-03-01

    A 480 square-mile region within Will County, northeastern Illinois was used as a test region for an evaluation of the sensitivity of aquifers to contamination. An aquifer sensitivity model was developed using a Geographic Information System (GIS) with ARC/INFO software to overlay and combine several data layers. Many of the input data layers were developed using 2-dimensional surface modeling (Interactive Surface Modeling (ISM)) and 3-dimensional volume modeling (Geologic Modeling Program (GMP)) computer software. Most of the input data layers (drift thickness, thickness of sand and gravel, depth to first aquifer) were derived from interpolation of descriptive logs for water wells and engineering borings from their study area. A total of 2,984 logs were used to produce these maps. The components used for the authors' model are (1) depth to sand and gravel or bedrock, (2) thickness of the uppermost sand and gravel aquifer, (3) drift thickness, and (4) absence or presence of uppermost bedrock aquifer. The model is an improvement over many aquifer sensitivity models because it combines specific information on depth to the uppermost sand and gravel aquifer with information on the thickness of the uppermost sand and gravel aquifer. The manipulation of the source maps according to rules-based assumptions results in a colored aquifer sensitivity map for the Will County study area. This colored map differentiates 42 aquifer sensitivity map areas by using line patterns within colors. The county-scale model results in an aquifer sensitivity map that can be a useful tool for making land-use planning decisions regarding aquifer protection and management of groundwater resources.

  10. Field Test Results of Using a Nacelle-Mounted Lidar for Improving Wind Energy Capture by Reducing Yaw Misalignment (Presentation)

    SciTech Connect (OSTI)

    Fleming, P.; Scholbrock, A.; Wright, A.

    2014-11-01

    Presented at the Nordic Wind Power Conference on November 5, 2014. This presentation describes field-test campaigns performed at the National Wind Technology Center in which lidar technology was used to improve the yaw alignment of the Controls Advanced Research Turbine (CART) 2 and CART3 wind turbines. The campaigns demonstrated that whether by learning a correction function to the nacelle vane, or by controlling yaw directly with the lidar signal, a significant improvement in power capture was demonstrated.

  11. Analyzing the interaction between state tax incentives and the federal production tax credit for wind power

    E-Print Network [OSTI]

    Wiser, Ryan; Bolinger, Mark; Gagliano, Troy

    2002-01-01

    Production Tax Credit for Wind Power Ryan Wiser and MarkState Policies Foster a Wind Power Resurgence The ImportancePTC) for large-scale wind power projects. While the federal

  12. The Cost of Transmission for Wind Energy: A Review of Transmission Planning Studies

    E-Print Network [OSTI]

    Mills, Andrew D.

    2009-01-01

    pdf/0554(2008).pdf European Wind Energy Association (EWEA).Large Scale Integration of Wind Energy in the European PowerPrepared by the European Wind Energy Association. http://

  13. Surpassing Expectations: State of the U.S. Wind Power Market

    E-Print Network [OSTI]

    Bolinger, Mark A

    2009-01-01

    States, new large-scale wind turbines were installed in 18The average size of wind turbines installed in the Uniteddominant manufacturer of wind turbines supplying the U.S.

  14. Advanced Control Design and Field Testing for Wind Turbines at the National Renewable Energy Laboratory: Preprint

    SciTech Connect (OSTI)

    Hand, M. M.; Johnson, K. E.; Fingersh, L. J.; Wright, A. D.

    2004-05-01

    Utility-scale wind turbines require active control systems to operate at variable rotational speeds. As turbines become larger and more flexible, advanced control algorithms become necessary to meet multiple objectives such as speed regulation, blade load mitigation, and mode stabilization. At the same time, they must maximize energy capture. The National Renewable Energy Laboratory has developed control design and testing capabilities to meet these growing challenges.

  15. Fixed Low-Order Controller Design and H Optimization for Large-Scale

    E-Print Network [OSTI]

    Overton, Michael L.

    fuel cell system (Wang and Fixed Low-Order Controller Design and H Optimization for Large-Scale Dynamical Systems Tim Mitchell maximizer of the associated transfer function. Our controller design code uses nonsmooth optimization

  16. Metal Catalyzed sp2 Bonded Carbon - Large-scale Graphene Synthesis...

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

    Metal Catalyzed sp2 Bonded Carbon - Large-scale Graphene Synthesis and Beyond December 1, 2009 at 3pm36-428 Peter Sutter Center for Functional Nanomaterials sutter abstract:...

  17. Modeling and Analysis of Large-Scale On-Chip Interconnects 

    E-Print Network [OSTI]

    Feng, Zhuo

    2010-07-14

    dimensional process-voltage-temperature (PVT) variations demand much more modeling and analysis efforts than ever before, while the analysis of large scale on-chip interconnects that requires solving tens of millions of unknowns imposes great challenges...

  18. Partition-of-unity finite-element method for large scale quantum...

    Office of Scientific and Technical Information (OSTI)

    can be investigated by such accurate, quantum mechanical means. The current state of the art for large-scale quantum simulations is the planewave (PW) method, as implemented in now...

  19. Programmable window : a large-scale transparent electronic display using SPD film

    E-Print Network [OSTI]

    Ramos, Martin (Ramos Rizo-Patron)

    2004-01-01

    This research demonstrates that Suspended Particle Device (SPD) film is a viable option for the development of large-scale transparent display systems. The thesis analyzes the SPD film from an architectural display application ...

  20. Large-Scale CAD Model Visualization on a Scalable Shared-Memory Architecture

    E-Print Network [OSTI]

    Wald, Ingo

    Boeing 777 air- liner. 1 Introduction Computer Aided Design (CAD) has practically be- come ubiquitous in large-scale manufacturing are potential overlaps of assembly parts, as well as the difficulty in prop

  1. Large-Scale Simulation of Neural Networks with Biophysically Accurate Models on Graphics Processors 

    E-Print Network [OSTI]

    Wang, Mingchao

    2012-07-16

    Efficient simulation of large-scale mammalian brain models provides a crucial computational means for understanding complex brain functions and neuronal dynamics. However, such tasks are hindered by significant computational complexities...

  2. Statistical and Directable Methods for Large-Scale Rigid Body Simulation 

    E-Print Network [OSTI]

    Hsu, Shu-Wei

    2013-05-07

    This dissertation describes several techniques to improve performance and controllability of large-scale rigid body simulations. We first describe a statistical simulation method that replaces certain stages of rigid body simulation with a...

  3. Model-constrained optimization methods for reduction of parameterized large-scale systems

    E-Print Network [OSTI]

    Bui-Thanh, Tan

    2007-01-01

    Most model reduction techniques employ a projection framework that utilizes a reduced-space basis. The basis is usually formed as the span of a set of solutions of the large-scale system, which are computed for selected ...

  4. Model-Constrained Optimization Methods for Reduction of Parameterized Large-Scale Systems

    E-Print Network [OSTI]

    Tan, Bui-Thanh

    Most model reduction techniques employ a projection framework that utilizes a reduced-space basis. The basis is usually formed as the span of a set of solutions of the large-scale system, which are computed for selected ...

  5. Nonlinear modulation of the HI power spectrum on ultra-large scales. I

    E-Print Network [OSTI]

    Umeh, Obinna; Santos, Mario

    2015-01-01

    Intensity mapping of the neutral hydrogen brightness temperature promises to provide a three-dimensional view of the universe on very large scales. Nonlinear effects are typically thought to alter only the small-scale power, but we show how they can bias the extraction of cosmological information contained in the power spectrum on ultra-large scales. For linear perturbations to remain valid on large scales, we need to renormalize perturbations at higher order. In the case of intensity mapping, the second-order contribution to clustering from weak lensing dominates nonlinear contribution at high redshift. Renormalization modifies the mean brightness temperature and therefore the evolution bias. It also introduces a term that mimics white noise. These effects can influence forecasting analysis on ultra-large scales.

  6. Membraneless hydrogen bromine laminar flow battery for large-scale energy storage

    E-Print Network [OSTI]

    Braff, William Allan

    2014-01-01

    Electrochemical energy storage systems have been considered for a range of potential large-scale energy storage applications. These applications vary widely, both in the order of magnitude of energy storage that is required ...

  7. Large Scale Performance Measurement of Content-Based Automated Image-Orientation Detection

    E-Print Network [OSTI]

    Tomkins, Andrew

    Large Scale Performance Measurement of Content-Based Automated Image-Orientation Detection Abstract (sepia toned), contains reflections in water, and contains few markers. Row 4: If deeper information

  8. Fast kernel spectral clustering based on incomplete Cholesky factorization for large scale data analysis

    E-Print Network [OSTI]

    Arenberg 10, B-3001 Leuven, Belgium Abstract A fast spectral clustering algorithm, suitable for large scale´ak) #12;1. Introduction1 Clustering algorithms comprise unsupervised, explanatory data mining tech-2

  9. LARGE-SCALE UNSTEADINESS IN A TWO-DIMENSIONAL DIFFUSER: NUMERICAL STUDY TOWARD ACTIVE SEPARATION CONTROL

    E-Print Network [OSTI]

    Colonius, Tim

    of Technology, Pasadena, California 91125 ABSTRACT We develop a reduced order model for large-scale unsteadiness mass injection can pinch off vortices with a smaller size; accordingly, their convective velocity

  10. Comparison of the effects in the rock mass of large-scale chemical...

    Office of Scientific and Technical Information (OSTI)

    Comparison of the effects in the rock mass of large-scale chemical and nuclear explosions. Final technical report, June 9, 1994--October 9, 1994 Citation Details In-Document Search...

  11. Extended tension leg platform design for offshore wind turbine systems

    E-Print Network [OSTI]

    Parker, Nicholas W. (Nicholas William)

    2007-01-01

    The rise of reliable wind energy application has become a primary alternative to conventional fossil fuel power plants in the United States and around the world. The feasibility of building large scale wind farms has become ...

  12. Wind Projects Providing Hope for Penn. Workers | Department of...

    Office of Environmental Management (EM)

    Projects Providing Hope for Penn. Workers Wind Projects Providing Hope for Penn. Workers March 8, 2010 - 11:28am Addthis Joshua DeLung The Recovery Act made three large-scale wind...

  13. Wind-electric icemaking project: Analysis and dynamometer testing. Volume 1

    SciTech Connect (OSTI)

    Holz, R.; Gervorgian, V.; Drouilhet, S.; Muljadi, E.

    1998-07-01

    The wind/hybrid systems group at the National Renewable Energy Laboratory has been researching the most practical and cost-effective methods for producing ice from off-grid wind-electric power systems. The first phase of the project, conducted in 1993--1994, included full-scale dynamometer and field testing of two different electric ice makers directly connected to a permanent magnet alternator. The results of that phase were encouraging and the second phase of the project was launched in which steady-state and dynamic numerical models of these systems were developed and experimentally validated. The third phase of the project was the dynamometer testing of the North Star ice maker, which is powered by a 12-kilowatt Bergey Windpower Company, Inc., alternator. This report describes both the second and third project phases. Also included are detailed economic analyses and a discussion of the future prospects of wind-electric ice-making systems. The main report is contained in Volume 1. Volume 2 consists of the report appendices, which include the actual computer programs used in the analysis and the detailed test results.

  14. The role of large-scale, extratropical dynamics in climate change

    SciTech Connect (OSTI)

    Shepherd, T.G. [ed.

    1994-02-01

    The climate modeling community has focused recently on improving our understanding of certain processes, such as cloud feedbacks and ocean circulation, that are deemed critical to climate-change prediction. Although attention to such processes is warranted, emphasis on these areas has diminished a general appreciation of the role played by the large-scale dynamics of the extratropical atmosphere. Lack of interest in extratropical dynamics may reflect the assumption that these dynamical processes are a non-problem as far as climate modeling is concerned, since general circulation models (GCMs) calculate motions on this scale from first principles. Nevertheless, serious shortcomings in our ability to understand and simulate large-scale dynamics exist. Partly due to a paucity of standard GCM diagnostic calculations of large-scale motions and their transports of heat, momentum, potential vorticity, and moisture, a comprehensive understanding of the role of large-scale dynamics in GCM climate simulations has not been developed. Uncertainties remain in our understanding and simulation of large-scale extratropical dynamics and their interaction with other climatic processes, such as cloud feedbacks, large-scale ocean circulation, moist convection, air-sea interaction and land-surface processes. To address some of these issues, the 17th Stanstead Seminar was convened at Bishop`s University in Lennoxville, Quebec. The purpose of the Seminar was to promote discussion of the role of large-scale extratropical dynamics in global climate change. Abstracts of the talks are included in this volume. On the basis of these talks, several key issues emerged concerning large-scale extratropical dynamics and their climatic role. Individual records are indexed separately for the database.

  15. Efficient Nonlinear Optimization with Rigorous Models for Large Scale Industrial Chemical Processes 

    E-Print Network [OSTI]

    Zhu, Yu

    2011-08-08

    of Department, Michael Pishko May 2011 Major Subject: Chemical Engineering iii ABSTRACT Efficient Nonlinear Optimization with Rigorous Models for Large Scale Industrial Chemical Processes. (May 2011) Yu Zhu, B.S., Zhejiang University; M.S., Zhejiang... . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. Nonlinear Optimization with Rigorous Large Scale Models 1 B. Chemical Applications of Nonlinear Optimization . . . . . 2 1. Design under Uncertainty . . . . . . . . . . . . . . . . 3 2. Optimal Operations with Steady State Models . . . . 4...

  16. 1. CONTRIBUTOR'S NAME: Mary Bricker 2. NAME OF INQUIRY: Plants on the move-testing wind-dispersed seeds

    E-Print Network [OSTI]

    Brewer, Carol

    1. CONTRIBUTOR'S NAME: Mary Bricker 2. NAME OF INQUIRY: Plants on the move-testing wind on the wind? b. How do plants move to new places? b. Ecological Theme(s): a. Diversity of life for our class, when previously we had focused mainly on making observations and generating questions.) d

  17. Large-Scale Urban Decontamination; Developments, Historical Examples and Lessons Learned

    SciTech Connect (OSTI)

    Rick Demmer

    2007-02-01

    Recent terrorist threats and actual events have lead to a renewed interest in the technical field of large scale, urban environment decontamination. One of the driving forces for this interest is the real potential for the cleanup and removal of radioactive dispersal device (RDD or “dirty bomb”) residues. In response the U. S. Government has spent many millions of dollars investigating RDD contamination and novel decontamination methodologies. Interest in chemical and biological (CB) cleanup has also peaked with the threat of terrorist action like the anthrax attack at the Hart Senate Office Building and with catastrophic natural events such as Hurricane Katrina. The efficiency of cleanup response will be improved with these new developments and a better understanding of the “old reliable” methodologies. Perhaps the most interesting area of investigation for large area decontamination is that of the RDD. While primarily an economic and psychological weapon, the need to cleanup and return valuable or culturally significant resources to the public is nonetheless valid. Several private companies, universities and National Laboratories are currently developing novel RDD cleanup technologies. Because of its longstanding association with radioactive facilities, the U. S. Department of Energy National Laboratories are at the forefront in developing and testing new RDD decontamination methods. However, such cleanup technologies are likely to be fairly task specific; while many different contamination mechanisms, substrate and environmental conditions will make actual application more complicated. Some major efforts have also been made to model potential contamination, to evaluate both old and new decontamination techniques and to assess their readiness for use. Non-radioactive, CB threats each have unique decontamination challenges and recent events have provided some examples. The U. S. Environmental Protection Agency (EPA), as lead agency for these emergency cleanup responses, has a sound approach for decontamination decision-making that has been applied several times. The anthrax contamination at the U. S. Hart Senate Office Building and numerous U. S. Post Office facilities are examples of employing novel technical responses. Decontamination of the Hart Office building required development of a new approach for high level decontamination of biological contamination as well as techniques for evaluating the technology effectiveness. The World Trade Center destruction also demonstrated the need for, and successful implementation of, appropriate cleanup methodologies. There are a number of significant lessons that can be gained from a look at previous large scale cleanup projects. Too often we are quick to apply a costly “package and dispose” method when sound technological cleaning approaches are available. Understanding historical perspectives, advanced planning and constant technology improvement are essential to successful decontamination.

  18. Error propagation equations for estimating the uncertainty in high-speed wind tunnel test results

    SciTech Connect (OSTI)

    Clark, E.L.

    1994-07-01

    Error propagation equations, based on the Taylor series model, are derived for the nondimensional ratios and coefficients most often encountered in high-speed wind tunnel testing. These include pressure ratio and coefficient, static force and moment coefficients, dynamic stability coefficients, and calibration Mach number. The error equations contain partial derivatives, denoted as sensitivity coefficients, which define the influence of free-steam Mach number, M{infinity}, on various aerodynamic ratios. To facilitate use of the error equations, sensitivity coefficients are derived and evaluated for five fundamental aerodynamic ratios which relate free-steam test conditions to a reference condition.

  19. Thermal Performance Evaluation of Attic Radiant Barrier Systems Using the Large Scale Climate Simulator (LSCS)

    SciTech Connect (OSTI)

    Shrestha, Som S [ORNL] [ORNL; Miller, William A [ORNL] [ORNL; Desjarlais, Andre Omer [ORNL] [ORNL

    2013-01-01

    Application of radiant barriers and low-emittance surface coatings in residential building attics can significantly reduce conditioning loads from heat flow through attic floors. The roofing industry has been developing and using various radiant barrier systems and low-emittance surface coatings to increase energy efficiency in buildings; however, minimal data are available that quantifies the effectiveness of these technologies. This study evaluates performance of various attic radiant barrier systems under simulated summer daytime conditions and nighttime or low solar gain daytime winter conditions using the large scale climate simulator (LSCS). The four attic configurations that were evaluated are 1) no radiant barrier (control), 2) perforated low-e foil laminated oriented strand board (OSB) deck, 3) low-e foil stapled on rafters, and 4) liquid applied low-emittance coating on roof deck and rafters. All test attics used nominal RUS 13 h-ft2- F/Btu (RSI 2.29 m2-K/W) fiberglass batt insulation on attic floor. Results indicate that the three systems with radiant barriers had heat flows through the attic floor during summer daytime condition that were 33%, 50%, and 19% lower than the control, respectively.

  20. Wind Technology Testing Center Earns A2LA Accreditation for Blade Testing |

    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:Financing ToolInternationalReport FY2014 -Energy Costs by IncreasingWholeWindAward |2Department

  1. Wind integration studies: optimization vs. Simulation

    SciTech Connect (OSTI)

    Kahn, Edward

    2010-11-15

    A variety of circumstances have focused attention in the electricity industry on the large-scale development of renewable energy generation. The motivations for this attention include concerns about the environmental effects of fossil fuel generation as well as the dependence of electricity production on fossil fuels. For all practical purposes these concerns mean the large-scale deployment of wind energy. (author)

  2. Preface: The Dalmarnock Fire Tests 

    E-Print Network [OSTI]

    Torero, Jose L; Carvel, Ricky O

    2007-11-14

    Given the current state of the art, the vibrancy of the profession and existing data from numerous large scale tests, why are new large scale experiments like the Dalmarnock Tests important or, indeed, even necessary?

  3. Application and Mode Establishment of Asset-backed Securitization in Existing Large-scale Public Building Retrofit Financing in China 

    E-Print Network [OSTI]

    Sun, J.; Wu, Y.; Dai, Z.; Hao, Y.

    2006-01-01

    to reconstruct existing large-scale public buildings for large-scale public buildings having the characteristics of high-energy consumption and low-energy efficiency. Existing building retrofit is a system engineering involving technology, policy and management...

  4. Large-Scale Renewable Energy Guide: Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities

    Broader source: Energy.gov [DOE]

    The Large-Scale Renewable Energy Guide: Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities provides best practices and other helpful guidance for federal agencies developing large-scale renewable energy projects.

  5. A Systematic Approach to the Design of a Large Scale Detritiation System for Controlled Thermonuclear Fusion Experiments

    E-Print Network [OSTI]

    A Systematic Approach to the Design of a Large Scale Detritiation System for Controlled Thermonuclear Fusion Experiments

  6. A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage

    E-Print Network [OSTI]

    Cui, Yi

    A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage Yuan Yang,a Guangyuan Zhengb and Yi Cui*ac Large-scale energy storage represents a key challenge for renewable energy develop a new lithium/ polysulfide (Li/PS) semi-liquid battery for large-scale energy storage

  7. Large-scale eddies and their role in entrainment in turbulent jets and wakes Jimmy Philip and Ivan Marusic

    E-Print Network [OSTI]

    Marusic, Ivan

    Large-scale eddies and their role in entrainment in turbulent jets and wakes Jimmy Philip and Ivan. Fluids 24, 086101 (2012) The influence of large-scale structures on entrainment in a decelerating://pof.aip.org/about/rights_and_permissions #12;PHYSICS OF FLUIDS 24, 055108 (2012) Large-scale eddies and their role in entrainment in turbulent

  8. Necessity and Requirements of a Collaborative Effort to Develop a Large Wind Turbine Blade Test Facility in North America

    SciTech Connect (OSTI)

    Cotrell, J.; Musial, W.; Hughes, S.

    2006-05-01

    The wind power industry in North America has an immediate need for larger blade test facilities to ensure the survival of the industry. Blade testing is necessary to meet certification and investor requirements and is critical to achieving the reliability and blade life needed for the wind turbine industry to succeed. The U.S. Department of Energy's (DOE's) Wind Program is exploring options for collaborating with government, private, or academic entities in a partnership to build larger blade test facilities in North America capable of testing blades up to at least 70 m in length. The National Renewable Energy Laboratory (NREL) prepared this report for DOE to describe the immediate need to pursue larger blade test facilities in North America, categorize the numerous prospective partners for a North American collaboration, and document the requirements for a North American test facility.

  9. On the self-sustained nature of large-scale motions in turbulent Couette flow

    E-Print Network [OSTI]

    Rawat, Subhandu; Hwang, Yongyun; Rincon, François

    2015-01-01

    Large-scale motions in wall-bounded turbulent flows are frequently interpreted as resulting from an aggregation process of smaller-scale structures. Here, we explore the alternative possibility that such large-scale motions are themselves self-sustained and do not draw their energy from smaller-scale turbulent motions activated in buffer layers. To this end, it is first shown that large-scale motions in turbulent Couette flow at Re=2150 self-sustain even when active processes at smaller scales are artificially quenched by increasing the Smagorinsky constant Cs in large eddy simulations. These results are in agreement with earlier results on pressure driven turbulent channels. We further investigate the nature of the large-scale coherent motions by computing upper and lower-branch nonlinear steady solutions of the filtered (LES) equations with a Newton-Krylov solver,and find that they are connected by a saddle-node bifurcation at large values of Cs. Upper branch solutions for the filtered large scale motions a...

  10. Organization of Energetic Particles by the Solar Wind Structure During the Declining to Minimum Phase of Solar Cycle 23

    E-Print Network [OSTI]

    2010-01-01

    Feldman, W.C. : 1978, Solar wind stream interfaces. J.of large-scale solar wind structures. Ph.D. dissertation,R.M. : 2008, Weaker solar wind from the polar coronal holes

  11. The application of non-destructive techniques to the testing of a wind turbine blade

    SciTech Connect (OSTI)

    Sutherland, H.; Beattie, A.; Hansche, B.; Musial, W.; Allread, J.; Johnson, J.; Summers, M.

    1994-06-01

    NonDestructive Testing (NDT), also called NonDestructive Evaluation (NDE), is commonly used to monitor structures before, during, and after testing. This paper reports on the use of two NDT techniques to monitor the behavior of a typical wind turbine blade during a quasi-static test-to-failure. The two NDT techniques used were acoustic emission and coherent optical. The former monitors the acoustic energy produced by the blade as it is loaded. The latter uses electron shearography to measure the differences in surface displacements between two load states. Typical results are presented to demonstrate the ability of these two techniques to locate and monitor both high damage regions and flaws in the blade structure. Furthermore, this experiment highlights the limitations in the techniques that must be addressed before one or both can be transferred, with a high probability of success, to the inspection and monitoring of turbine blades during the manufacturing process and under normal operating conditions.

  12. Constraining ultra large-scale cosmology with multiple tracers in optical and radio surveys

    E-Print Network [OSTI]

    Alonso, David

    2015-01-01

    Multiple tracers of the cosmic density field, with different bias, number and luminosity evolution, can be used to measure the large-scale properties of the Universe. We show how an optimal combination of tracers can be used to detect general-relativistic effects in the observed density of sources. We forecast for the detectability of these effects, as well as measurements of primordial non-Gaussianity and large-scale lensing magnification with current and upcoming large-scale structure experiments. In particular we quantify the significance of these detections in the short term with experiments such as the Dark Energy Survey (DES), and in the long term with the Large Synoptic Survey Telescope (LSST) and the Square Kilometre Array (SKA). We review the main observational challenges that must be overcome to carry out these measurements.

  13. Magnetic Fields and Large Scale Structure in a hot Universe. I. General Equations

    E-Print Network [OSTI]

    E. Battaner; E. Florido; J. Jimenez-Vicente

    1997-10-06

    We consider that no mean magnetic field exists during this epoch, but that there is a mean magnetic energy associated with large-scale magnetic inhomogeneities. We study the evolution of these inhomogeneities and their influence on the large scale density structure, by introducing linear perturbations in Maxwell equations, the conservation of momentum-energy equation, and in Einstein field equations. The primordial magnetic field structure is time independent in the linear approximation, only being diluted by the general expansion, so that $\\vec{B}R^2$ is conserved in comoving coordinates. Magnetic fields have a strong influence on the formation of large-scale structure. Firstly, relatively low fields are able to generate density structures even if they were inexistent at earlier times. Second, magnetic fields act anisotropically more recently, modifying the evolution of individual density clouds. Magnetic flux tubes have a tendency to concentrate photons in filamentary patterns.

  14. A Minimal Model for Large-scale Epitaxial Growth Kinetics of Graphene

    E-Print Network [OSTI]

    Jiang, Huijun

    2015-01-01

    Epitaxial growth via chemical vapor deposition is considered to be the most promising way towards synthesizing large area graphene with high quality. However, it remains a big theoretical challenge to reveal growth kinetics with atomically energetic and large-scale spatial information included. Here, we propose a minimal kinetic Monte Carlo model to address such an issue on an active catalyst surface with graphene/substrate lattice mismatch, which facilitates us to perform large scale simulations of the growth kinetics over two dimensional surface with growth fronts of complex shapes. A geometry-determined large-scale growth mechanism is revealed, where the rate-dominating event is found to be $C_{1}$-attachment for concave growth front segments and $C_{5}$-attachment for others. This growth mechanism leads to an interesting time-resolved growth behavior which is well consistent with that observed in a recent scanning tunneling microscopy experiment.

  15. What Will the Neighbors Think? Building Large-Scale Science Projects Around the World

    ScienceCinema (OSTI)

    Jones, Craig; Mrotzek, Christian; Toge, Nobu; Sarno, Doug

    2010-01-08

    Public participation is an essential ingredient for turning the International Linear Collider into a reality. Wherever the proposed particle accelerator is sited in the world, its neighbors -- in any country -- will have something to say about hosting a 35-kilometer-long collider in their backyards. When it comes to building large-scale physics projects, almost every laboratory has a story to tell. Three case studies from Japan, Germany and the US will be presented to examine how community relations are handled in different parts of the world. How do particle physics laboratories interact with their local communities? How do neighbors react to building large-scale projects in each region? How can the lessons learned from past experiences help in building the next big project? These and other questions will be discussed to engage the audience in an active dialogue about how a large-scale project like the ILC can be a good neighbor.

  16. Copy of Using Emulation and Simulation to Understand the Large-Scale Behavior of the Internet.

    SciTech Connect (OSTI)

    Adalsteinsson, Helgi; Armstrong, Robert C.; Chiang, Ken; Gentile, Ann C.; Lloyd, Levi; Minnich, Ronald G.; Vanderveen, Keith; Van Randwyk, Jamie A; Rudish, Don W.

    2008-10-01

    We report on the work done in the late-start LDRDUsing Emulation and Simulation toUnderstand the Large-Scale Behavior of the Internet. We describe the creation of a researchplatform that emulates many thousands of machines to be used for the study of large-scale inter-net behavior. We describe a proof-of-concept simple attack we performed in this environment.We describe the successful capture of a Storm bot and, from the study of the bot and furtherliterature search, establish large-scale aspects we seek to understand via emulation of Storm onour research platform in possible follow-on work. Finally, we discuss possible future work.3

  17. Measurement of Truck Cab Flow in Support of Wind Turbine Testing

    SciTech Connect (OSTI)

    Larwood, S. M. (National Renewable Energy Laboratory); Acker, B.; Sencenbaugh, J. (Windlite Corporation)

    1998-12-17

    This report describes an experiment to measure the airflow over a truck cab that can be used to conduct steady-state tests on an 8-kW wind turbine. The cab airflow measurements were made to document the turbine inflow for analytical models. The airflow measurements were made with an array of anemometers positioned to represent the turbine rotor disk. The data showed that the influence of the truck cab was primarily in the lower sector of the rotor disk. The influence was negligible in the rest of the rotor disk.

  18. Large scale magnetic field of the Milky Way from WMAP3 data

    E-Print Network [OSTI]

    Ronnie Jansson; Glennys R. Farrar; Andre Waelkens; Torsten A. Ensslin

    2007-08-20

    We report on initial results from a project to constrain the large-scale and turbulent magnetic fields of the Milky Way galaxy, which eventually will incorporate all of the relevant observational data. In this paper we fit popular large scale magnetic field models to WMAP3 polarization maps. We find that the polarization data can constrain certain model parameters but does not uniquely determine the best-fit parameters. We also find that the polarization data alone cannot distinguish between model symmetries, e.g., the existence of field reversals. We show how future UHECR data can break this degeneracy.

  19. Large scale magnetic fields and coherent structures in nonuniform unmagnetized plasma

    SciTech Connect (OSTI)

    Jucker, Martin; Andrushchenko, Zhanna N.; Pavlenko, Vladimir P.

    2006-07-15

    The properties of streamers and zonal magnetic structures in magnetic electron drift mode turbulence are investigated. The stability of such large scale structures is investigated in the kinetic and the hydrodynamic regime, for which an instability criterion similar to the Lighthill criterion for modulational instability is found. Furthermore, these large scale flows can undergo further nonlinear evolution after initial linear growth, which can lead to the formation of long-lived coherent structures consisting of self-bound wave packets between the surfaces of two different flow velocities with an expected modification of the anomalous electron transport properties.

  20. Coverage and large scale anisotropies estimation methods for the Pierre Auger Observatory

    SciTech Connect (OSTI)

    Hamilton, Jean-Christophe; /Paris, IN2P3

    2005-07-01

    When searching for anisotropies in the arrival directions of Ultra High Energy Cosmic Rays, one must estimate the number of events expected in each direction of the sky in the case of a perfect isotropy. We present in this article a new method, developed for the Auger Observatory, based on a smooth estimate of the zenith angle distribution obtained from the data itself (which is essentially unchanged in the case of the presence of a large scale anisotropy pattern). We also study the sensitivity of several methods to detect large-scale anisotropies in the cosmic ray arrival direction distribution : Rayleigh analysis, dipole fitting and angular power spectrum estimation.

  1. Manufactured Home Testing in Simulated and Naturally Occurring High Winds for WCTE Conference

    SciTech Connect (OSTI)

    William D. Richins; Thomas K. Larson; Jeffrey M. Lacy; Ryan G. Kobbe

    2006-08-01

    A typical double-wide manufactured home was tested in simulated and naturally occurring high winds to understand structural behavior and improve performance during severe windstorms. Seven (7) lateral load tests were conducted on a double-wide manufactured home at a remote field test site in Wyoming. An extensive instrumentation package monitored the overall behavior of the home and collected data vital to validating computational software for the manufactured housing industry. The tests were designed to approach the design load of the home without causing structural damage, thus allowing the behavior of the home to be accessed when the home was later exposed to high winds (to 80-mph). The data generally show near-linear initial system response with significant non-linear behavior as the applied loads increase. Load transfer across the marriage line is primarily compression. Racking, while present, is very small. Interface slip and shear displacement along the marriage line are nearly insignificant. Horizontal global displacements reached 0.6 inch. These tests were designed primarily to collect data necessary to calibrate a desktop analysis and design software tool, MHTool, under development at the Idaho National Laboratory specifically for manufactured housing. Currently available analysis tools are, for the most part, based on methods developed for "stick built" structures and are inappropriate for manufactured homes. The special materials utilized in manufactured homes, such as rigid adhesives used in the connection of the sheathing materials to the studs, significantly alter the behavior of manufactured homes under lateral loads. Previous full scale tests of laterally loaded manufactured homes confirm the contention that conventional analysis methods are not applicable. System behavior dominates the structural action of manufactured homes and its prediction requires a three dimensional analysis of the complete unit, including tie-downs. This project was sponsored by the US Department of Energy, US Department of Housing and Urban Development, and the Manufactured Housing Institute. The results of this research can lead to savings in annual losses of life and property by providing validated information to enable the advancement of code requirements and by developing engineering software that can predict and optimize wind resistance.

  2. Proceedings of the fourth biennial conference and workshop on wind energy conversion systems

    SciTech Connect (OSTI)

    Kottler, R.J. Jr.

    1980-06-01

    Separate abstracts are included for papers presented concerning research and development requirements and utility interface and institutional issues for small-scale systems; design requirements and research and development requirements for large-scale systems; economic and operational requirements of large-scale wind systems; wind characteristics and wind energy siting; international activities; wind energy applications in agriculture; federal commercialization and decentralization plans; and wind energy innovative systems.

  3. Base excitation testing system using spring elements to pivotally mount wind turbine blades

    DOE Patents [OSTI]

    Cotrell, Jason; Hughes, Scott; Butterfield, Sandy; Lambert, Scott

    2013-12-10

    A system (1100) for fatigue testing wind turbine blades (1102) through forced or resonant excitation of the base (1104) of a blade (1102). The system (1100) includes a test stand (1112) and a restoring spring assembly (1120) mounted on the test stand (1112). The restoring spring assembly (1120) includes a primary spring element (1124) that extends outward from the test stand (1112) to a blade mounting plate (1130) configured to receive a base (1104) of blade (1102). During fatigue testing, a supported base (1104) of a blad (1102) may be pivotally mounted to the test stand (1112) via the restoring spring assembly (1120). The system (1100) may include an excitation input assembly (1140) that is interconnected with the blade mouting plate (1130) to selectively apply flapwise, edgewise, and/or pitch excitation forces. The restoring spring assemply (1120) may include at least one tuning spring member (1127) positioned adjacent to the primary spring element (1124) used to tune the spring constant or stiffness of the primary spring element (1124) in one of the excitation directions.

  4. Stability Design for the Crane Columns of the Wind Technology Testing Center E. M. Hines1

    E-Print Network [OSTI]

    Hines, Eric

    generation of wind turbine blades for off-shore wind farm development. Whereas the largest blades for land- based wind farms in the United States are currently on the order of 50 m long, and generate 2-3 MW of power per turbine, offshore wind turbines are expected to reach power outputs as high as 10 MW

  5. Collaborative Visualization for Large-Scale Accelerator Electromagnetic Modeling (Final Report)

    SciTech Connect (OSTI)

    William J. Schroeder

    2011-11-13

    This report contains the comprehensive summary of the work performed on the SBIR Phase II, Collaborative Visualization for Large-Scale Accelerator Electromagnetic Modeling at Kitware Inc. in collaboration with Stanford Linear Accelerator Center (SLAC). The goal of the work was to develop collaborative visualization tools for large-scale data as illustrated in the figure below. The solutions we proposed address the typical problems faced by geographicallyand organizationally-separated research and engineering teams, who produce large data (either through simulation or experimental measurement) and wish to work together to analyze and understand their data. Because the data is large, we expect that it cannot be easily transported to each team member's work site, and that the visualization server must reside near the data. Further, we also expect that each work site has heterogeneous resources: some with large computing clients, tiled (or large) displays and high bandwidth; others sites as simple as a team member on a laptop computer. Our solution is based on the open-source, widely used ParaView large-data visualization application. We extended this tool to support multiple collaborative clients who may locally visualize data, and then periodically rejoin and synchronize with the group to discuss their findings. Options for managing session control, adding annotation, and defining the visualization pipeline, among others, were incorporated. We also developed and deployed a Web visualization framework based on ParaView that enables the Web browser to act as a participating client in a collaborative session. The ParaView Web Visualization framework leverages various Web technologies including WebGL, JavaScript, Java and Flash to enable interactive 3D visualization over the web using ParaView as the visualization server. We steered the development of this technology by teaming with the SLAC National Accelerator Laboratory. SLAC has a computationally-intensive problem important to the nations scientific progress as described shortly. Further, SLAC researchers routinely generate massive amounts of data, and frequently collaborate with other researchers located around the world. Thus SLAC is an ideal teammate through which to develop, test and deploy this technology. The nature of the datasets generated by simulations performed at SLAC presented unique visualization challenges especially when dealing with higher-order elements that were addressed during this Phase II. During this Phase II, we have developed a strong platform for collaborative visualization based on ParaView. We have developed and deployed a ParaView Web Visualization framework that can be used for effective collaboration over the Web. Collaborating and visualizing over the Web presents the community with unique opportunities for sharing and accessing visualization and HPC resources that hitherto with either inaccessible or difficult to use. The technology we developed in here will alleviate both these issues as it becomes widely deployed and adopted.

  6. Page Digest for Large-Scale Web Services Daniel Rocco, David Buttler, Ling Liu

    E-Print Network [OSTI]

    Liu, Ling

    Page Digest for Large-Scale Web Services Daniel Rocco, David Buttler, Ling Liu Georgia Institute, 2003 Abstract The rapid growth of the World Wide Web and the Internet has fueled interest in Web services and the Semantic Web, which are quickly becoming important parts of modern electronic commerce

  7. A fast, large-scale learning method for protein sequence classification

    E-Print Network [OSTI]

    Pavlovic, Vladimir

    A fast, large-scale learning method for protein sequence classification Pavel Kuksa, Pai-Hsi Huang spatial sample kernels (SSSK). The approach offers state-of-the-art accuracy for sequence classification]: Applications; I.5.2. [Pattern Recognition]: De- corresponding author Permission to make digital or hard copies

  8. YouTubeEvent: on Large-Scale Video Event Classification Bingbing Ni

    E-Print Network [OSTI]

    Cortes, Corinna

    YouTubeEvent: on Large-Scale Video Event Classification Bingbing Ni Advanced Digital Sciences the problem of general event classification from uncontrolled YouTube videos. It is a challenging task due from YouTube to represent these categories. To improve classification per- formance, video content

  9. Day-Ahead and Real-Time Models for Large-Scale Energy Storage

    E-Print Network [OSTI]

    Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System #12;DayDay-Ahead and Real-Time Models for Large-Scale Energy Storage Final Project Report Power Systems of Electrical, Computer, and Energy Engineering P.O. BOX 875706 Tempe, AZ 85287-5706 Phone: 480 965-1276 Fax

  10. Analysis of Large-Scale Social Surveys1 Elaine Zanutto2

    E-Print Network [OSTI]

    Gelman, Andrew

    Large-scale social surveys are an important source of information for a wide range of topics an inexpensive and easily accessible source of information on a wide range of topics including education, health, economics, demography, politics, and criminal justice. These surveys may serve as a primary data source

  11. A steady-state L-mode tokamak fusion reactor : large scale and minimum scale

    E-Print Network [OSTI]

    Reed, Mark W. (Mark Wilbert)

    2010-01-01

    We perform extensive analysis on the physics of L-mode tokamak fusion reactors to identify (1) a favorable parameter space for a large scale steady-state reactor and (2) an operating point for a minimum scale steady-state ...

  12. Funding for Large-Scale Sustainable Energy Projects Combining Expert Opinions to Support Decisions

    E-Print Network [OSTI]

    Mountziaris, T. J.

    Funding for Large-Scale Sustainable Energy Projects Combining Expert Opinions to Support Decisions technologies: solar, carbon capture, nuclear, biofuels, and electricity from biomass. The challenge a probability distribution over outcomes dependent on R&D funding amounts. This probability distribution

  13. Architecture for a large-scale ion-trap quantum computer

    E-Print Network [OSTI]

    Monroe, Christopher

    Architecture for a large-scale ion-trap quantum computer D. Kielpinski*, C. Monroe & D. J. Wineland ........................................................................................................................................................................................................................... Among the numerous types of architecture being explored for quantum computers are systems utilizing ion proposed a `quantum charge-coupled device' (QCCD) architecture consisting of a large number

  14. A Large-scale Study on Predicting and Contextualizing Building Energy Usage J. Zico Kolter

    E-Print Network [OSTI]

    Kolter, J. Zico

    Joseph Ferreira Jr. Department of Urban Studies and Planning Massachusetts Institute of TechnologyA Large-scale Study on Predicting and Contextualizing Building Energy Usage J. Zico Kolter Computer Cambridge, MA 02139 Abstract In this paper we present a data-driven approach to mod- eling end user energy

  15. Large-Scale Fabrication, 3D Tomography, and Lithium-Ion Battery Application of Porous Silicon

    E-Print Network [OSTI]

    Zhou, Chongwu

    Large-Scale Fabrication, 3D Tomography, and Lithium-Ion Battery Application of Porous Silicon, United States *S Supporting Information ABSTRACT: Recently, silicon-based lithium-ion battery anodes have for the next-generation lithium-ion batteries with enhanced capacity and energy density. KEYWORDS: Cost

  16. Solving Large Scale Binary Quadratic Problems: Spectral Methods vs. Semidefinite Programming

    E-Print Network [OSTI]

    Lunds Universitet

    with good performance. 1 1. Introduction Spectral relaxation methods can be applied to a wide variety]. In partic- ular, large scale problems that can be formulated with a binary quadratic objective function. The two methods are based on a sub- gradient optimization scheme. We show good performance on a number

  17. Simulation-based optimization of communication protocols for large-scale wireless sensor networks1

    E-Print Network [OSTI]

    Maróti, Miklós

    everyday life more comfortable, e.g. Intelligent Spaces [3]. These sensor networks often use distributed of the wireless sensors may vary greatly, but invariably each of the intelligent sensors is a compact device1 Simulation-based optimization of communication protocols for large-scale wireless sensor networks

  18. Distinct large-scale turbulent-laminar states in transitional pipe flow

    E-Print Network [OSTI]

    Barkley, Dwight

    ) When fluid flows through a channel, pipe, or duct, there are two basic forms of motion: smooth laminarDistinct large-scale turbulent-laminar states in transitional pipe flow David Moxey1 and Dwight alternat- ing turbulent-laminar flow states on long length scales in subcri- tical shear flows (12

  19. Large-scale simulations of fluctuating biological membranes Andrea Pasqua,1,a

    E-Print Network [OSTI]

    Oster, George

    in their computational demands, these approaches are still limited in the scope of fluctuations and response they can's response to a prodding nanorod. © 2010 American Institute of Physics. doi:10.1063/1.3382349 I. INTRODUCTION feasibly capture. Extending computer simulations to examine large scale behaviors such as aggregation

  20. 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...

  1. A COMBINED VARIABLE METRIC -CONJUGATE GRADIENT ALGORITHM FOR A CLASS OF LARGE SCALE UNCONSTRAINED MINIMIZATION

    E-Print Network [OSTI]

    Oren, Shmuel S.

    A COMBINED VARIABLE METRIC - CONJUGATE GRADIENT ALGORITHM FOR A CLASS OF LARGE SCALE UNCONSTRAINED, California Abstract An algorithm is being presented for a special class of unconstrained minimization that is updated by the Rank One update, using gradients obtained in the preceeding steps. Two classes of problems

  2. Assessing the Economic Impacts of Large Scale Environmental Regulations in California

    E-Print Network [OSTI]

    Berck, Peter

    Assessing the Economic Impacts of Large Scale Environmental Regulations in California By Peter Berck and H. Peter Hess Abstract California is a leader in the use of environmental regulation environmental) costs and benefits. The method of analysis is to use a computable general equilibrium model

  3. A Scalable Mark-Sweep Garbage Collector on Large-Scale Shared-Memory Machines

    E-Print Network [OSTI]

    A Scalable Mark-Sweep Garbage Collector on Large-Scale Shared-Memory Machines Toshio ENDO Kenjiro (Ultra SPARC compare&swap R10000 load- linked, store-conditional) 4 Sun Ultra Enterprise 10000 64 Ultra- erational garbage collector for a multithreaded imple- mentation of ML. In Proceedings of ACM SIGPLAN

  4. LARGE SCALE GRAZING SYSTEMS IN THE NORDIC REGION: THEIR HISTORY, CHARACTERISTICS AND STABILITY

    E-Print Network [OSTI]

    Oksanen, Lauri

    , the increased meat price and demand for furs lead to overhunting of wild reindeer, which in turn allowed-based sheep and cattle husbandry or large-scale reindeer nomadism, which now extended even to the marine populations of reindeer, sheep and cattle, and the use of wood as fuel by herdsmen, vast expanses of mountain

  5. Performance Enhancement with Speculative Execution Based Parallelism for Processing Large-scale XML-based

    E-Print Network [OSTI]

    Govindaraju, Madhusudhan

    @cs.binghamton.edu Grid Computing Research Laboratory Computer Science Department Binghamton University Binghamton, NY format for many distributed/grid ap- plications, with the size of these documents ranging from tens processing library for large-scale XML datasets. The parallelization approach is to build a DFA-based parser

  6. Linear Scaling 3D Fragment Method for Large-scale Electronic Structure Calculations

    E-Print Network [OSTI]

    Linear Scaling 3D Fragment Method for Large-scale Electronic Structure Calculations Lin-Wang Wang devices or optical devices like solar cells. Understanding the electronic structures of such systems structure, the charge density, the total energy and the atomic forces of a material system

  7. Environmental impacts of large-scale grid-connected ground-mounted PV installations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Environmental impacts of large-scale grid-connected ground-mounted PV installations Antoine Beylota-scale ground-mounted PV installations by considering a life-cycle approach. The methodology is based. Mobile PV installations with dual-axis trackers show the largest impact potential on ecosystem quality

  8. Linguistically Motivated Large-Scale NLP with C&C and Boxer James R. Curran

    E-Print Network [OSTI]

    Curran, James R.

    Linguistically Motivated Large-Scale NLP with C&C and Boxer James R. Curran School of Information- binatory Categorial Grammar (CCG) parser (Clark and Curran, 2004b). The parser not only recovers the local lexical categories with high accuracy and low ambiguity (Curran et al., 2006). The combination of finite

  9. Linguistically Motivated LargeScale NLP with C&C and Boxer James R. Curran

    E-Print Network [OSTI]

    Curran, James R.

    Linguistically Motivated Large­Scale NLP with C&C and Boxer James R. Curran School of Information­ binatory Categorial Grammar (CCG) parser (Clark and Curran, 2004b). The parser not only recovers the local lexical categories with high accuracy and low ambiguity (Curran et al., 2006). The combination of finite

  10. LARGE-SCALE LINKED DATA PROCESSING: CLOUD COMPUTING TO THE RESCUE?

    E-Print Network [OSTI]

    Grossman, Robert

    LARGE-SCALE LINKED DATA PROCESSING: CLOUD COMPUTING TO THE RESCUE? Michael Hausenblas1 , Robert. Cloud computing offerings such as SimpleDB or BigQuery, and cloud-enabled NoSQL systems including- specific requirements and review existing cloud computing offerings as well as NoSQL systems that may

  11. SPECTRAL BASED METHODS THAT STREAMLINE THE SEARCH FOR FAILURE SCENARIOS IN LARGE-SCALE DISTRIBUTED SYSTEMS

    E-Print Network [OSTI]

    the detection of failure sce- narios in distributed grid computing, cloud computing and other large scale performance deteriorates and fails. KEY WORDS grid computing, cloud computing, failure, spectral expan- sion systems such as computing grids and commercial cloud systems has made mass computing services available

  12. Copyright 2014 IEEE. Reprinted, with permission from: CERTS Microgrid Demonstration With Large-Scale Energy

    E-Print Network [OSTI]

    Copyright © 2014 IEEE. Reprinted, with permission from: CERTS Microgrid Demonstration With Large GRID, VOL. 5, NO. 2, MARCH 2014 937 CERTS Microgrid Demonstration With Large-Scale Energy Storage (CERTS) Microgrid concept captures the emerging po- tential of Distributed Energy Resource (DER) using

  13. Large-Scale Flow Response to the Breaking of Mountain Gravity Waves

    E-Print Network [OSTI]

    Lott, Francois

    Large-Scale Flow Response to the Breaking of Mountain Gravity Waves François Lott, LMD, Ecole and synoptic impacts of mountain gravity waves breaking observations Some diagnostics tools Parameterization in weather prediction and climate models 3) Interaction between a front and an idealised mountain massive

  14. Harnessing the Cloud for Securely Outsourcing Large-scale Systems of Linear Equations

    E-Print Network [OSTI]

    Wang, Jia

    1 Harnessing the Cloud for Securely Outsourcing Large-scale Systems of Linear Equations Cong Wang and cloud are not necessarily in the same trusted domain brings many security concerns and chal- lenges the quality of the computed results. Thus, we argue that the cloud is intrinsically not secure from

  15. Large-Scale Oceanographic Constraints on the Distribution of Melting and Freezing under Ice Shelves

    E-Print Network [OSTI]

    Gnanadesikan, Anand

    Large-Scale Oceanographic Constraints on the Distribution of Melting and Freezing under Ice Shelves experience asymmetric melting and freezing. Topography may constrain oceanic circulation (and thus basal melt­freeze patterns) through its influence on the potential vorticity (PV) field. However, melting and freezing induce

  16. Development of Large Scale High Performance Applications with a Parallelizing Compiler

    E-Print Network [OSTI]

    Vlad, Gregorio

    Development of Large Scale High Performance Applications with a Parallelizing Compiler B. DI parallel computations, and lack of robustness of parallelizing HPF compilers in handling large sized codes directives, into explicitly parallel code, by means of parallelizing compilers. This method is not only

  17. Parallel Implementation of a Large-Scale 3-D Air Pollution Model

    E-Print Network [OSTI]

    Ostromsky, Tzvetan

    Parallel Implementation of a Large-Scale 3-D Air Pollution Model Tzvetan Ostromsky1 and Zahari-4000 Roskilde, Denmark, zz@dmu.dk; http://www.dmu.dk/AtmosphericEnvironment Abstract. Air pollution component of the environment, where the pollutants can be transported over very long distances. Therefore

  18. Parameter identification in large-scale models for oil and gas production

    E-Print Network [OSTI]

    Van den Hof, Paul

    Parameter identification in large-scale models for oil and gas production Jorn F.M. Van Doren: Models used for model-based (long-term) operations as monitoring, control and optimization of oil and gas information to the identification problem. These options are illustrated with examples taken from oil and gas

  19. Combining Multiple, Large-Scale Resources in a Reusable Lexicon for Natural Language Generation

    E-Print Network [OSTI]

    Combining Multiple, Large-Scale Resources in a Reusable Lexicon for Natural Language Generation for different generation applications. In this paper, we describe our work to build such a lexicon by combining transforma- tion and integration of resources is required to reuse them for generation. We also applied

  20. Combining Multiple, LargeScale Resources in a Reusable Lexicon for Natural Language Generation

    E-Print Network [OSTI]

    Schiffman, Barry

    Combining Multiple, Large­Scale Resources in a Reusable Lexicon for Natural Language Generation#erent generation applications. In this paper, we describe our work to build such a lexicon by combining multiple and integration of resources is required to reuse them for generation. We also applied the lexicon to the lexical

  1. Energy Efficiency for Large-Scale MapReduce Workloads with Significant Interactive Analysis

    E-Print Network [OSTI]

    California at Irvine, University of

    Energy Efficiency for Large-Scale MapReduce Workloads with Significant Interactive Analysis Yanpei make energy efficiency a critical concern. Prior works on MapReduce energy efficiency have not yet con to achieve for MIA workloads. These concerns lead us to develop BEEMR (Berkeley Energy Efficient Map

  2. Control and data channels allocation for Large-Scale UWB-based WSNs

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    - nications (GSM) [3]. In GSM networks, channel allocation is a function of network sizing (taking in accountControl and data channels allocation for Large-Scale UWB-based WSNs Jamila Ben Slimane, Ye: jamilabs07@yahoo.fr, Song@loria.fr, akoubaa@dei.isep.ipp.pt Abstract--Resource allocation is a critical

  3. An Efficient Method for Large-Scale Slack Allocation Siddharth Joshi Stephen Boyd

    E-Print Network [OSTI]

    ]. For slack allocation problems with other utility objective functions, see [SKT97, YCS02]. A timing graph canAn Efficient Method for Large-Scale Slack Allocation Siddharth Joshi Stephen Boyd May 20, 2008; to choose one we maximize a separable concave utility function, such as the sum of the logarithms

  4. PARAFAC algorithms for large-scale problems Anh Huy Phan a,, Andrzej Cichocki b

    E-Print Network [OSTI]

    Cichocki, Andrzej

    PARAFAC algorithms for large-scale problems Anh Huy Phan a,Ã, Andrzej Cichocki b a Lab for Advanced a multidimensional data. Most of the existing algorithms for the PARAFAC, especially the alternating least squares (ALS) algorithm need to compute Khatri­Rao products of tall factors and multiplication of large

  5. Identification of Market Power in Large-Scale Electric Energy Markets Bernard C. Lesieutre

    E-Print Network [OSTI]

    Identification of Market Power in Large-Scale Electric Energy Markets Bernard C. Lesieutre Hyung and competitive operation of centrally- dispatched electricity markets. Traditional measures for market power demand and reserve requirements, a centrally-dispatched electricity market provides a transparent

  6. Microfluidic very large scale integration (mVLSI) with integrated micromechanical valves{

    E-Print Network [OSTI]

    Quake, Stephen R.

    Microfluidic very large scale integration (mVLSI) with integrated micromechanical valves{ Ismail40258k Microfluidic chips with a high density of control elements are required to improve device and accessible high-density microfluidic chips, we have fabricated a monolithic PDMS valve architecture

  7. Large-Scale Patent Classification with Min-Max Modular Support Vector Machines

    E-Print Network [OSTI]

    Lu, Bao-Liang

    Large-Scale Patent Classification with Min-Max Modular Support Vector Machines Xiao-Lei Chu, Chao Ma, Jing Li, Bao-Liang Lu Senior Member, IEEE, Masao Utiyama, and Hitoshi Isahara Abstract-- Patent-world patent classification typically exceeds one million, and this number increases every year. An effective

  8. Comparative Analysis of Balanced Winnow and SVM in Large Scale Patent Categorization

    E-Print Network [OSTI]

    Steels, Luc

    Comparative Analysis of Balanced Winnow and SVM in Large Scale Patent Categorization Katrien Beuls techniques, a collection of 1.2 million patent applications is used to build a classifier that is able). Contrary to SVM, Balanced Winnow is frequently applied in today's patent categorization systems. Results

  9. The SAL Interpreter for Large-Scale Optimization in Distributed Control Systems

    E-Print Network [OSTI]

    Bailey-Kellogg, Chris

    The SAL Interpreter for Large-Scale Optimization in Distributed Control Systems Christopher Bailey sensor-rich control systems interact with spa- tially distributed physical environments. This paper interpretation and control tasks for distributed physical systems. SAL provides a set of powerful, abstract com

  10. Small-scale thin film experiments provide models for large-scale engineering applications

    E-Print Network [OSTI]

    Reis, Pedro Miguel

    Small-scale thin film experiments provide models for large-scale engineering applicationsMIT's Department of Civil and Environmental Engineering · http://cee.mit.edu Delamination occurs in a thin film blisters occur in a predictable manner. Photo / Donna Coveney, MIT PROBLEM Thin films are omnipresent

  11. Investigating Quality in Large-Scale Open Source Software Uzma Raja, Evelyn Barry

    E-Print Network [OSTI]

    Scacchi, Walt

    43 Investigating Quality in Large-Scale Open Source Software Uzma Raja, Evelyn Barry Texas A and understand these projects. Software quality is an important characteristic effecting overall system lifecycle cost, performance and useful life. The existing models for software quality are based on empirical

  12. A Large-scale Benchmark Study of Existing Algorithms for Taxonomy-Independent

    E-Print Network [OSTI]

    Slatton, Clint

    A Large-scale Benchmark Study of Existing Algorithms for Taxonomy-Independent Microbial Community sequencing technology have created new op- portunities to probe the hidden world of microbes. Taxonomy: pyrosequencing, 16S rRNA, taxonomy independent analysis, massive data, clustering, microbial diversity estimation

  13. Imprinted large-scale high density polymer nanopillars for organic solar cells

    E-Print Network [OSTI]

    Gao, Jinming

    Imprinted large-scale high density polymer nanopillars for organic solar cells Mukti Aryal used to make bulk heterojunction solar cells by depositing PCBM on top of the pillars. Imprinting provides a way to precisely control the interdigitized heterojunction morphology, leading to improved solar

  14. Computational Strategies for Large-Scale MILP Transshipment Models for Heat Exchanger Network Synthesis

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    1 Computational Strategies for Large-Scale MILP Transshipment Models for Heat Exchanger Network Determining the minimum number of units is an important step in heat exchanger network synthesis (HENS Words heat exchanger network synthesis (HENS), transshipment model, mixed-integer linear programming

  15. Deep-Sea Research II 52 (2005) 26982714 Mechanisms regulating large-scale seasonal fluctuations in

    E-Print Network [OSTI]

    McGillicuddy Jr., Dennis J.

    2005-01-01

    Deep-Sea Research II 52 (2005) 2698­2714 Mechanisms regulating large-scale seasonal fluctuations Hole, MA 02543, USA b Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA c School by ocean currents. Third, the organism is capable of directed motion through the water by virtue of its

  16. MAP-Inference on Large Scale Higher-Order Discrete Graphical Models by Fusion Moves

    E-Print Network [OSTI]

    Schnörr, Christoph

    MAP-Inference on Large Scale Higher-Order Discrete Graphical Models by Fusion Moves J¨org Hendrik reconsider the work of Lempitsky et al. 2010 on fusion moves and apply it to general discrete graphical models. We propose two alternatives for calculating fusion moves that outperform the standard in several

  17. Analytics over Large-Scale Multidimensional Data: The Big Data Revolution!

    E-Print Network [OSTI]

    Song, Il-Yeol

    Analytics over Large-Scale Multidimensional Data: The Big Data Revolution! Alfredo Cuzzocrea ICAR in the field of analytics over big data, and we extend the discussion to analytics over big multidimensional, Management, Performance, Theory Keywords Analytics over Big Data, Analytics over Big Multidimensional Data

  18. 1. INTRODUCTION The large-scale production of single-walled nanotubes

    E-Print Network [OSTI]

    Resasco, Daniel

    is a synthesis method that could be amenable to the development of continuous processes under relatively mild1. INTRODUCTION The large-scale production of single-walled nanotubes (SWNTs) at low cost is a goal operating conditions and therefore lower costs than those of the current production methods.1 However

  19. A Unique Large-Scale, Multidirectional Basin for Collaborative Tsunami and Coastal Research

    E-Print Network [OSTI]

    Pancake, Cherri M.

    -wave runup behavior is critical if we are to develop appropriate warning systems and evacuation strategiesA Unique Large-Scale, Multidirectional Basin for Collaborative Tsunami and Coastal Research Solomon a unique laboratory for the tsunami and coastal engineering communities. Under the Network for Earthquake

  20. An Empirical Relation Between The Large-Scale Magnetic Field And The Dynamical Mass In Galaxies

    E-Print Network [OSTI]

    Tabatabaei, F S; Knapen, J H; Beckman, J E; Koribalski, B; Elmegreen, B G

    2015-01-01

    The origin and evolution of cosmic magnetic fields as well as the influence of the magnetic fields on the evolution of galaxies are unknown. Though not without challenges, the dynamo theory can explain the large-scale coherent magnetic fields which govern galaxies, but observational evidence for the theory is so far very scarce. Putting together the available data of non-interacting, non-cluster galaxies with known large-scale magnetic fields, we find a tight correlation between the integrated polarized flux density and the rotation speed, v(rot), of galaxies. This leads to an almost linear correlation between the large-scale magnetic field B and v(rot), assuming that the number of cosmic ray electrons is proportional to the star formation rate. This correlation cannot be attributed to an active linear dynamo processes, as no correlation holds with shear or angular speed. It indicates instead a coupling between the large-scale magnetic field and the dynamical mass of the galaxies, B~M(dyn)^{0.2-0.3}. Hence, f...