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1

Climatology of Warm Boundary Layer Clouds at the ARM SGP Site and Their Comparison to Models  

Science Conference Proceedings (OSTI)

A 4-yr climatology (1997–2000) of warm boundary layer cloud properties is developed for the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Program Southern Great Plains (SGP) site. Parameters in the climatology include cloud ...

Manajit Sengupta; Eugene E. Clothiaux; Thomas P. Ackerman

2004-12-01T23:59:59.000Z

2

ARM - Visiting the SGP  

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PlainsVisiting the SGP PlainsVisiting the SGP SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts Visiting the SGP View a custom Google map with driving directions to the SGP Central Facility. View a custom Google map with driving directions to the SGP Central Facility. Safety First! Before visiting the SGP, you must submit a Site Access Request Form. When visiting the site, you must attend a safety orientation given by the Site Operations Manager. Environmental Safety and Health Documents The Environmental Safety and Health (ES&H) documents listed below are

3

ARM - SGP Operations  

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Operations Operations SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts SGP Operations Routine Operations SGP central facility offices. SGP central facility offices. The overwhelming majority of the measurements with the highest priority, on which the existing experimental designs are based, are regular routine observations, as specified in the ARM Program Plan, 1990 (U.S. Department of Energy 1990). Scientifically and logistically, routine operations also serve as the basis and background for all nonroutine operations, including

4

ARM - SGP Science  

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Science Science SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts SGP Science Overall Objectives The primary goal of the Southern Great Plains (SGP) site is to produce data adequate to support significant research addressing the objectives of the overall ARM Climate Research Facility. These overall objectives, as paraphrased from the ARM Program Plan (DOE 1990), are the following: to describe the radiative energy flux profile of the clear and cloudy atmosphere to understand the processes determining the flux profile

5

SGP Central Facility  

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Central Facility Central Facility SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts SGP Central Facility The ARM Climate Research Facility deploys specialized remote sensing instruments in a fixed location at the site to gather atmospheric data of unprecedented quality, consistency, and completeness. More than 30 instrument clusters have been placed around the site; the central facility; and the boundary, intermediate, and extended facilities. The locations for the instruments were chosen so that the measurements reflect conditions

6

ARM - SGP Central Facility  

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Central Facility Central Facility SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts SGP Central Facility The ARM Climate Research Facility deploys specialized remote sensing instruments in a fixed location at the site to gather atmospheric data of unprecedented quality, consistency, and completeness. More than 30 instrument clusters have been placed around the site; the central facility; and the boundary, intermediate, and extended facilities. The locations for the instruments were chosen so that the measurements reflect conditions

7

ARM - SGP Boundary Facility  

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facilities-located at Hillsboro, Kansas; Morris, Oklahoma; Purcelll, Oklahoma and Vici, Oklahoma (north, east, south and west, respectively)-marked the approximate midpoint of...

8

ARM - SGP Rural Driving Hazards  

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Rural Driving Hazards Rural Driving Hazards SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts SGP Rural Driving Hazards The rural location of the Southern Great Plains (SGP) site facilities requires that visitors travel on unpaved, dirt and gravel, roads. Visitors should be aware of the driving hazards this presents by taking the following precautions: Proceed cautiously: Many rural roads have unmarked and blind intersections. Slow down: Sanded and gravel raods can cause a vehicle to swerve. Maintain a safe following distance: During the dry season, vehicles

9

SGP Shipment Notification Form  

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PlainsShipment Notification Form PlainsShipment Notification Form SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts Shipment Notification Form Note: Red text indicates a required field. Your Notification Form has been submitted. Section 1 : Initiator Information Date Afilliation Name Phone Number Email Section 2 : Vendor Information Ship From Point of Contact Address Phone Section 3 : Carrier Information Shipping Company Tracking/AWB Number Number of Boxes Approximate Weight for EACH BOX Expected Ship Date Section 4 : Shipment List Description System/Instrument

10

ARM - SGP Geographic Information By Facility  

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Geographic Information By Facility Geographic Information By Facility SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts SGP Geographic Information By Facility Note: BF = Boundary Facility, EF = Extended Facility, and IF = Intermediate Facility Site Elevation (m) Lat./Long. Surface Type Anthony, Kansas: EF31 412 37.151 N -98.362W Pasture Ashton, Kansas: EF9 386 37.133 N 97.266 W Pasture Beaumont, Kansas: IF1 (Removed 4/12/2011) 478 37.626 N 96.538 W Rangeland Billings, OK (XSAPR Radar): IF4 330 36.579 N 97.364 W Cultivated Field Billings, OK (915 MHz RWP): IF9 291 36.476 N

11

AVESTAR® - Shale Gas Processing (SGP)  

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Shale Gas Processing (SGP) Shale Gas Processing (SGP) SPG The shale gas revolution is transforming America's energy landscape and economy. The shale gas boom, including the Marcellus play in Appalachia, is driving job creation and investment in the energy sector and is also helping to revive other struggling sectors of the economy like manufacturing. Continued growth in domestic shale gas processing requires that energy companies maximize the efficiency and profitability from their operations through excellent control and drive maximum business value from all their plant assets, all while reducing negative environmental impact and improving safety. Changing demographics and rapidly evolving plant automation and control technologies also necessitate training and empowering the next-generation of shale gas process engineering and

12

ARM - Field Campaign - SGP99 IOP  

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govCampaignsSGP99 IOP govCampaignsSGP99 IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : SGP99 IOP 1999.07.07 - 1999.07.22 Lead Scientist : Richard Cederwall Summary The Southern Great Plains 1997 Hydrology Experiment (SGP97) successfully demonstrated the ability to map and monitor soil moisture using low frequency microwave radiometers (L band, 1.4 GHz). Soil moisture retrieval algorithms developed using higher resolution data were proven to be extendible to coarser resolution (Jackson et al., 1999). Figure 1 shows one sequence of soil moisture observations obtained in SGP97. The resulting data set will be the focus of a wide variety of value added scientific research in hydrology, meteorology, and climate. SGP97 also developed a

13

Interpolation Uncertainties Across the ARM SGP Area  

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Interpolation Uncertainties Across the ARM SGP Area Interpolation Uncertainties Across the ARM SGP Area J. E. Christy, C. N. Long, and T. R. Shippert Pacific Northwest National Laboratory Richland, Washington Interpolation Grids Across the SGP Network Area The U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program operates a network of surface radiation measurement sites across north central Oklahoma and south central Kansas. This Southern Great Plains (SGP) network consists of 21 sites unevenly spaced from 95.5 to 99.5 degrees west longitude, and from 34.5 to 38.5 degrees north latitude. We use the technique outlined by Long and Ackerman (2000) and Long et al. (1999) to infer continuous estimates of clear-sky downwelling shortwave (SW) irradiance, SW cloud effect, and daylight fractional sky cover for each

14

Investigation of Unusual Albedos in the SGP Domain  

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Investigation of Unusual Albedos in the SGP Domain Investigation of Unusual Albedos in the SGP Domain Groff, David ARM SGP Duchon, Claude University Of Oklahoma Category: Atmospheric State and Surface We investigate the cause of unusually high albedos at an Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) extended facility near Morris, OK. In a previous study, daily albedos were calculated at several SGP extended facilities for 1998 and 1999 using broadband (.28 to 3 microns) pyranometers. The average daily albedo during this period was calculated to be at least about 5% higher at Morris than at any of the other SGP extended facilities. Surface based measurements of daily albedos at Morris and two nearby SGP extended facilities during 2004 and 2005 suggest the unusually high albedo measurements at Morris are real.

15

Category:Wichita, KS | Open Energy Information  

Open Energy Info (EERE)

KS KS Jump to: navigation, search Go Back to PV Economics By Location Media in category "Wichita, KS" The following 16 files are in this category, out of 16 total. SVFullServiceRestaurant Wichita KS Westar Energy Inc.png SVFullServiceRestauran... 60 KB SVHospital Wichita KS Westar Energy Inc.png SVHospital Wichita KS ... 64 KB SVLargeHotel Wichita KS Westar Energy Inc.png SVLargeHotel Wichita K... 59 KB SVLargeOffice Wichita KS Westar Energy Inc.png SVLargeOffice Wichita ... 64 KB SVMediumOffice Wichita KS Westar Energy Inc.png SVMediumOffice Wichita... 62 KB SVMidriseApartment Wichita KS Westar Energy Inc.png SVMidriseApartment Wic... 61 KB SVOutPatient Wichita KS Westar Energy Inc.png SVOutPatient Wichita K... 62 KB SVPrimarySchool Wichita KS Westar Energy Inc.png

16

Category:Goodland, KS | Open Energy Information  

Open Energy Info (EERE)

KS KS Jump to: navigation, search Go Back to PV Economics By Location Media in category "Goodland, KS" The following 16 files are in this category, out of 16 total. SVFullServiceRestaurant Goodland KS Westar Energy Inc.png SVFullServiceRestauran... 60 KB SVHospital Goodland KS Westar Energy Inc.png SVHospital Goodland KS... 63 KB SVLargeHotel Goodland KS Westar Energy Inc.png SVLargeHotel Goodland ... 59 KB SVLargeOffice Goodland KS Westar Energy Inc.png SVLargeOffice Goodland... 65 KB SVMediumOffice Goodland KS Westar Energy Inc.png SVMediumOffice Goodlan... 63 KB SVMidriseApartment Goodland KS Westar Energy Inc.png SVMidriseApartment Goo... 60 KB SVOutPatient Goodland KS Westar Energy Inc.png SVOutPatient Goodland ... 63 KB SVPrimarySchool Goodland KS Westar Energy Inc.png

17

New Surface Meteorological Measurements at SGP,  

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NM, March 22 - 26, 2004 NM, March 22 - 26, 2004 1 New Surface Meteorological Measurements at SGP, and Their Use for Assessing Radiosonde Measurement Accuracy L.M. Miloshevich National Center for Atmospheric Research Boulder, Colorado B.M. Lesht and M. Ritche Argonne National Laboratory Argonne, Illinois Introduction Several recent ARM investigations have been directed toward characterizing and improving the accuracy of ARM radiosonde water vapor measurements. Tobin et al. (2002) showed that calculating the downwelling and outgoing longwave fluxes with a target accuracy of 1 W m -2 requires knowing the total-column precipitable water vapor (PW) with 2% absolute accuracy and knowing the upper troposphere (UT) water vapor with 10% absolute accuracy. Turner et al. (2003) used an empirical

18

Microsoft Word - SGP CART Safety Orientation.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

4-002 4-002 SGP CART SAFETY ORIENTATION Page 1 of 1 SGP CART SAFETY ORIENTATION Revised 10/14/04 1 INTRODUCTION Welcome to the Atmospheric Radiation Measurement Program's Southern Great Plains (SGP) Climate Research Facility. Argonne National Laboratory (ANL) manages this U.S. Department of Energy (DOE) site. It is very important that all visitors comply with all DOE and ANL safety requirements, as well as those of the Occupational Safety and Health Administration (OSHA), the National Fire Protection Association, and the U.S. Environmental Protection Agency, and with other requirements as applicable. 2 VISITOR SIGN-IN AND SIGN-OUT All visitors to the SGP CART site are required to complete a Site Access Request (SAR) form before visiting the site.

19

ARM - PI Product - Aerosol Retrievals from ARM SGP MFRSR Data  

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ProductsAerosol Retrievals from ARM SGP MFRSR Data ProductsAerosol Retrievals from ARM SGP MFRSR Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Aerosol Retrievals from ARM SGP MFRSR Data 2000.01.01 - 2000.12.31 Site(s) SGP General Description The Multi-Filter Rotating Shadowband Radiometer (MFRSR) makes precise simultaneous measurements of the solar direct normal and diffuse horizontal irradiances at six wavelengths (nominally 415, 500, 615, 673, 870, and 940 nm) at short intervals (20 sec for ARM instruments) throughout the day. Time series of spectral optical depth are derived from these measurements. Besides water vapor at 940 nm, the other gaseous absorbers within the MFRSR channels are NO2 (at 415, 500, and 615 nm) and ozone (at 500, 615, and 670

20

* SGP Central Facility - surrounded by wheat felds, the  

NLE Websites -- All DOE Office Websites (Extended Search)

SGP Central Facility - surrounded by wheat felds, the SGP Central Facility - surrounded by wheat felds, the heavily instrumented Central Facility served as the primary source of information about cloud and carbon feedbacks. * Little Washita Watershed - located in a mix of pasture land and winter wheat, three carbon fux towers and associ ated instruments were added at this site. Two additional fux towers were located at Fort Cobb, in nearby croplands,

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Initial Evaluation of the Cumulus Potential Scheme at the ACRF SGP Site  

NLE Websites -- All DOE Office Websites (Extended Search)

Meeting, Meeting, 12 March 2008 Initial Evaluation of the Cumulus Potential Scheme at the ACRF SGP Site Larry K. Berg, William I. Gustafson Jr., and Evgueni I. Kassianov Pacific Northwest National Laboratory ARM Science Team Meeting, 12 March 2008 Where are We Going? Development Simulation Evaluation Observations ARM Science Team Meeting, 12 March 2008 Development: Coupling Clouds to the Convective Boundary Layer * Shallow cumuli are turbulently coupled to the planetary boundary layer 4 3 2 1 0 Height (km) 6 5 4 3 2 1 0 Distance (km) Simulation courtesy of M. Ovtchinnikov ARM Science Team Meeting, 12 March 2008 Development: Coupling Clouds to the Convective Boundary Layer * Parameterization should represent this coupling * The Cumulus Potential (CuP) scheme is one way - Accounts for sub-grid

22

Continental Liquid-phase Stratus Clouds at SGP: Meteorological Influences  

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Continental Liquid-phase Stratus Clouds at SGP: Meteorological Influences Continental Liquid-phase Stratus Clouds at SGP: Meteorological Influences and Relationship to Adiabacity Kim, Byung-Gon Kangnung National University Schwartz, Stephen Brookhaven National Laboratory Miller, Mark Brookhaven National Laboratory Min, Qilong State University of New York at Albany Category: Cloud Properties The microphysical properties of continental stratus clouds observed over SGP appear to be substantially influenced by micrometeorological conditions, such as static stability and updraft velocity. These influences may contribute to the observed weak correlation of aerosol light scattering coefficient with cloud-drop effective radius [Kim et al., JGR, 2003], although aerosol light scattering coefficient is not necessarily the most suitable surrogate aerosol property for number concentration of cloud

23

ARM Carbon Cycle Gases Flasks at SGP Site  

DOE Data Explorer (OSTI)

Data from flasks are sampled at the Atmospheric Radiation Measurement Program ARM, Southern Great Plains Site and analyzed by the National Oceanic and Atmospheric Administration NOAA, Earth System Research Laboratory ESRL. The SGP site is included in the NOAA Cooperative Global Air Sampling Network. The surface samples are collected from a 60 m tower at the ARM SGP Central Facility, usually once per week in the afternoon. The aircraft samples are collected approximately weekly from a chartered aircraft, and the collection flight path is centered over the tower where the surface samples are collected. The samples are collected by the ARM and LBNL Carbon Project.

Sebastien Biraud

24

Surface Spectral Albedo Intensive Operational Period at the ARM SGP Site in august 2002: Results, Analysis, and Future Plans  

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Spectral Albedo Intensive Operational Period Spectral Albedo Intensive Operational Period at the ARM SGP Site in August 2002: Results, Analysis, and Future Plans A. P. Trishchenko and Y. Luo Canada Centre for Remote Sensing Ottawa, Ontario, Canada M. C. Cribb and Z. Li University of Maryland College Park, Maryland K. Hamm University of Oklahoma Norman, Oklahoma Introduction A surface spectral albedo Intensive Operational Period (IOP) at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site was conducted during August 14-19, 2002, to meet the ARM Program need in a detailed knowledge of surface boundary conditions for atmospheric radiation studies. We measured surface spectral albedos/reflectances for several representative surface types and made a survey of landcover types over an area of approximately 10 km x 10 km centered

25

Characterizing the Vertical Distribution of Aerosols Over the ARM SGP Site  

Science Conference Proceedings (OSTI)

This project focused on: 1) evaluating the performance of the DOE ARM SGP Raman lidar system in measuring profiles of water vapor and aerosols, and 2) the use of the Raman lidar measurements of aerosol and water vapor profiles for assessing the vertical distribution of aerosols and water vapor simulated by global transport models and examining diurnal variability of aerosols and water vapor. The highest aerosol extinction was generally observed close to the surface during the nighttime just prior to sunrise. The high values of aerosol extinction are most likely associated with increased scattering by hygroscopic aerosols, since the corresponding average relative humidity values were above 70%. After sunrise, relative humidity and aerosol extinction below 500 m decreased with the growth in the daytime convective boundary layer. The largest aerosol extinction for altitudes above 1 km occurred during the early afternoon most likely as a result of the increase in relative humidity. The water vapor mixing ratio profiles generally showed smaller variations with altitude between day and night. We also compared simultaneous measurements of relative humidity, aerosol extinction, and aerosol optical thickness derived from the ARM SGP Raman lidar and in situ instruments on board a small aircraft flown routinely over the ARM SGP site. In contrast, the differences between the CARL and IAP aerosol extinction measurements are considerably larger. Aerosol extinction derived from the IAP measurements is, on average, about 30-40% less than values derived from the Raman lidar. The reasons for this difference are not clear, but may be related to the corrections for supermicron scattering and relative humidity that were applied to the IAP data. The investigators on this project helped to set up a major field mission (2003 Aerosol IOP) over the DOE ARM SGP site. One of the goals of the mission was to further evaluate the aerosol and water vapor retrievals from this lidar system. Analysis of the aerosol and water vapor data collected by the Raman lidar during the 2003 Aerosol IOP indicated that the sensitivity of the lidar was significantly lower than when the lidar was initially deployed. A detailed analysis after the IOP of the long-term dataset demonstrated that the lidar began degrading in early 2002, and that it lost approximately a factor of 4 in sensitivity between 2002 and 2004. We participated in the development of the remediation plan for the system to restore its initial performance. We conducted this refurbishment and upgrade from May- September 2004. This remediation lead to an increase in the signal-to-noise ratio of 10 and 30 for the Raman lidar's water vapor mixing ratio and aerosol backscatter coefficient data, respectively as compared to the signal strengths when the system was first deployed. The DOE ARM Aerosol Lidar Validation Experiment (ALIVE), which was conducted during September 2005, evaluated the impact of these modifications and upgrades on the SGP Raman lidar measurements of aerosol extinction and optical thickness. The CARL modifications significantly improved the accuracy and temporal resolution of the aerosol measurements. Aerosol extinction profiles measured by the Raman lidar were also used to evaluate aerosol extinction profiles and aerosol optical thickness (AOT) simulated by aerosol models as part of the Aerosol module inter-Comparison in global models (AEROCOM) (http://nansen.ipsl.jussieu.fr/AEROCOM/aerocomhome.html) project. There was a wide range in how the models represent the aerosol extinction profiles over the ARM SGP site, even though the average annual AOT represented by the various models and measured by CARL and the Sun photometer were in general agreement, at least within the standard deviations of the averages. There were considerable differences in the average vertical distributions among the models, even among models that had similar average aerosol optical thickness. Deviations between mean aerosol extinction profiles were generally small (~20-30%) for altitudes above 2 km, and grew consider

Richard Ferrare, Connor Flynn, David Turner

2009-05-05T23:59:59.000Z

26

New Eddy Correlation System for ARM SGP Site  

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New Eddy Correlation System for ARM SGP Site New Eddy Correlation System for ARM SGP Site M. S. Pekour Argonne National Laboratory Argonne, Illinois Background Eddy correlation (ECOR) systems are widely used for in situ measurement of the turbulent fluxes in the atmosphere. The ECOR technique is the most direct method for determining fluxes; vertical fluxes are obtained by correlating the vertical wind component with the horizontal wind component (momentum flux), temperature (sensible heat flux), water vapor density (latent heat flux), and a scalar admixture density (e.g., CO 2 flux). Typically, an ultrasonic anemometer-thermometer ("sonic anemometer") is used for rapid, high-precision, three-dimensional (3D) wind measurements, as well as for temperature fluctuation measurements. A fast-response humidity sensor, such as an infra-red gas analyzer (IRGA) is

27

Simultaneous Spectral Albedo Measurements Near the ARM SGP Central Facility  

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Simultaneous Spectral Albedo Measurements Simultaneous Spectral Albedo Measurements Near the ARM SGP Central Facility J. J. Michalsky and Q.-L. Min Atmospheric Sciences Research Center State University of New York Albany, New York J. C. Barnard and R. T. Marchand Pacific Northwest National Laboratory P. Pilewskie National Aeronautics and Space Administration Ames Research Center Moffett Field, California Introduction During ARM Enhanced Shortwave Experiment II (ARESE II) the Twin Otter aircraft made low-altitude (100-300-m) passes over the Central Facility (CF) at the Southern Great Plains (SGP) Clouds and Radiation Testbed (CART) site as part of the flight pattern design for the experiment. The National Aeronautics and Space Administration (NASA) Ames Research Center's Solar Spectral Flux

28

Direct Aerosol Forcing in the Infrared at the SGP Site?  

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Direct Aerosol Forcing in the Infrared at the SGP Site? Direct Aerosol Forcing in the Infrared at the SGP Site? D. D. Turner and C. N. Long Pacific Northwest National Laboratory Richland, Washington Introduction Low level haze is often observed during the night and early morning hours in many locations. This haze is typically formed during quiescent conditions by radiative cooling of the surface, which lowers the ambient temperature and consequently increases the near-surface relative humidity (RH). Many aerosols start to deliquesce around 75% relative humidity (RH) (depending on their chemical composition), and thus if the near surface RH increases above this level, haze will form. The Atmospheric Radiation Measurement (ARM) Program's ultimate goal, stated simply, is to improve the treatment of radiative transfer in global climate models. Global climate models typically do not

29

SGP Cloud and Land Surface Interaction Campaign (CLASIC): Measurement Platforms  

SciTech Connect

The Cloud and Land Surface Interaction Campaign (CLASIC) will be conducted from June 8 to June 30, 2007, at the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) Southern Great Plains (SGP) site. Data will be collected using eight aircraft equipped with a variety of specialized sensors, four specially instrumented surface sites, and two prototype surface radar systems. The architecture of CLASIC includes a high-altitude surveillance aircraft and enhanced vertical thermodynamic and wind profile measurements that will characterize the synoptic scale structure of the clouds and the land surface within the ACRF SGP site. Mesoscale and microscale structures will be sampled with a variety of aircraft, surface, and radar observations. An overview of the measurement platforms that will be used during the CLASIC are described in this report. The coordination of measurements, especially as it relates to aircraft flight plans, will be discussed in the CLASIC Implementation Plan.

MA Miller; R Avissar; LK Berg; SA Edgerton; ML Fischer; TJ Jackson; B. Kustas; PJ Lamb; G McFarquhar; Q Min; B Schmid; MS Torn; DD Tuner

2007-06-01T23:59:59.000Z

30

Heterogeneous surface fluxes and their effects on the SGP CART site  

SciTech Connect

The treatment of subgrid-scale variations of surface properties and the resultant spatial variations of sensible and latent heat fluxes has received increasing attention in recent years. Mesoscale numerical simulations of highly idealized conditions, in which strong flux contrasts exist between adjacent surfaces, have shown that under some circumstances the secondary circulations induced by land-use differences can significantly affect the properties of the planetary boundary layer (PBL) and the region of the atmosphere above the PBL. At the Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site, the fluxes from different land-surface types are not expected to differ as dramatically as those found in idealized simulations. Although the corresponding effects on the atmosphere should thus be less dramatic, they are still potentially important. From an ARM perspective, in tests of single column models (SCMs) it would be useful to understand the effects of the lower boundary conditions on model performance. We describe here our initial efforts to characterize the variable surface fluxes over the CART site and to assess their effects on the PBL that are important for the performance of SCMs.

Doran, J.C.; Hu, Q.; Hubbe, J.M.; Liljegren, J.C.; Shaw, W.J.; Zhong, S. [Pacific Northwest Lab., Richland, WA (United States); Collatz, G.J. [Goddard Space Flight Center/NASA, Greenbelt, MD (United States)

1995-03-01T23:59:59.000Z

31

ARM - PI Product - SGP and TWP (Manus) Ice Cloud Vertical Velocities  

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ProductsSGP and TWP (Manus) Ice Cloud Vertical ProductsSGP and TWP (Manus) Ice Cloud Vertical Velocities Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : SGP and TWP (Manus) Ice Cloud Vertical Velocities 1997.01.01 - 2010.12.31 Site(s) SGP TWP General Description Daily netcdf-files of ice-cloud dynamics observed at the ARM sites at SGP (Jan1997-Dec2010) and Manus (Jul1999-Dec2010). The files include variables at different time resolution (10s, 20min, 1hr). Profiles of radar reflectivity factor (dbz), Doppler velocity (vel) as well as retrieved vertical air motion (V_air) and reflectivity-weighted particle terminal fall velocity (V_ter) are given at 10s, 20min and 1hr resolution. Lower level clouds are removed, however a multi-layer flag is included.

32

CIMEL Measurements of Zenith Radiances at the ARM SGP Site  

NLE Websites -- All DOE Office Websites (Extended Search)

CIMEL Measurements of Zenith Radiances CIMEL Measurements of Zenith Radiances at the ARM SGP Site W. J. Wiscombe National Aeronautics and Space Administration Goddard Space Flight Center Climate and Radiation Branch Greenbelt, Maryland A. Marshak and K. Evans Joint Center for Earth Systems Technology University of Maryland Baltimore, Maryland Y. Knyazikhin Department of Geography Boston University Boston, Massachusetts H. W. Barker Environment Canada Downsview, Ontario, Canada C. F. Pavloski Department of Meteorology Pennsylvania State University University Park, Pennsylvania A. B. Davis Los Alamos National Laboratory Space and Remote Sensing Sciences Los Alamos, New Mexico M. Miller Brookhaven National Laboratory Upton, New York Introduction The objective of our study is to exploit the sharp spectral contrast in vegetated surface reflectance across

33

SGP Cloud and Land Surface Interaction Campaign (CLASIC)  

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3 3 SGP Cloud and Land Surface Interaction Campaign (CLASIC): Science and Implementation Plan June 2007 Mark A. Miller, Principal Investigator and The CLASIC Steering Committee: Roni Avissar, Larry Berg, Sylvia Edgerton, Marc Fischer, Tom Jackson, Bill Kustas, Pete Lamb, Greg McFarquhar, Qilong Min, Beat Schmid, Margaret Torn, and Dave Turner Work supported by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research M.R. Miller et al., DOE/SC-ARM-0703 Executive Summary The Cloud and Land Surface Interaction Campaign is a field experiment designed to collect a comprehensive data set that can be used to quantify the interactions that occur between the atmosphere, biosphere, land surface, and subsurface. A particular focus will be on how these

34

ARM - Field Campaign - Ground-based Cloud Tomography Experiment at SGP  

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govCampaignsGround-based Cloud Tomography Experiment at SGP govCampaignsGround-based Cloud Tomography Experiment at SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Ground-based Cloud Tomography Experiment at SGP 2009.05.26 - 2009.07.17 Lead Scientist : Dong Huang For data sets, see below. Description Knowledge of 3D cloud properties is pressingly needed in many research fields. One of the problems encountered when trying to represent 3D cloud fields in numerical models is that the existing techniques cannot provide necessary observations at the required spatial scale and resolution. We tested a new promising technique for measuring 3D cloud microphysical structure, called cloud microwave tomography, at the Southern Great Plains (SGP) site for one month in late April 2009. Five microwave scanning

35

Evaluation of Precipitation Simulated by Seven SCMs against the ARM Observations at the SGP Site  

Science Conference Proceedings (OSTI)

This study evaluates the performances of seven single-column models (SCMs) by comparing simulated surface precipitation with observations at the Atmospheric Radiation Measurement Program Southern Great Plains (SGP) site from January 1999 to ...

Hua Song; Wuyin Lin; Yanluan Lin; Audrey B. Wolf; Roel Neggers; Leo J. Donner; Anthony D. Del Genio; Yangang Liu

2013-08-01T23:59:59.000Z

36

Using a Microwave Emission Model to Estimate Soil Moisture from ESTAR Observations during SGP99  

Science Conference Proceedings (OSTI)

The 1999 Southern Great Plains Hydrology Experiment (SGP99) provides comprehensive datasets for evaluating microwave remote sensing of soil moisture algorithms that involve complex physical properties of soils and vegetation. The Land Surface ...

Huilin Gao; Eric F. Wood; Matthias Drusch; Wade Crow; Thomas J. Jackson

2004-02-01T23:59:59.000Z

37

Assessment of the ECMWF Model Cloudiness and Surface Radiation Fields at the ARM SGP Site  

Science Conference Proceedings (OSTI)

The cloud and radiation fields produced by the operational ECMWF forecasts are assessed using observations from the Atmospheric Radiation Measurement Program (ARM) Southern Great Plains (SGP) site over the April–May 1999 period. Over the first 36 ...

Jean-Jacques Morcrette

2002-02-01T23:59:59.000Z

38

Characterization of Surface Albedo Over the ARM SGP CART and the NSA  

NLE Websites -- All DOE Office Websites (Extended Search)

Characterization of Surface Albedo Characterization of Surface Albedo Over the ARM SGP CART and the NSA Z. Li and M. C. Cribb Earth System Science Interdisciplinary Center University of Maryland College Park, Maryland A. P. Trishchenko and Y. Luo Canada Centre for Remote Sensing Ottawa, Ontario, Canada Introduction Surface albedo is needed for satellite remote sensing of the surface radiation budget and for climate modelling. Determination of areal-mean surface albedo is challenging. Over the Southern Great Plains (SGP) site, a primary challenge lies in the inhomogeneity associated with different land cover types. Over the North Slope of Alaska (NSA) site, persistent cloud cover renders remote sensing of surface albedo difficult. We tackle both challenges following two different approaches. Over the SGP site, we

39

Improved ARM-SGP TOA OLR Fluxes from GOES-8 IR Radiances Based on CERES Data  

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ARM-SGP TOA OLR Fluxes from GOES-8 IR ARM-SGP TOA OLR Fluxes from GOES-8 IR Radiances Based on CERES Data D. R. Doelling and M. M. Khaiyer Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Langley Research Center Hampton, Virginia Introduction The radiation budget at the top of the atmosphere (TOA) is a quantity of fundamental importance to the Atmospheric Radiation Measurement (ARM) Program. Thus, it is necessary to measure the radiation budget components, broadband shortwave albedo and outgoing longwave radiation (OLR), as accurately as possible. Measurement of OLR over the ARM surface sites has only been possible since the advent of Clouds and the Earth's Radiant Energy System (CERES; Wielicki et al. 1998) in 1998. Prior to

40

Infrared Land Surface Emissivity in the Vicinity of the ARM SGP Central Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

Infrared Land Surface Emissivity in the Vicinity Infrared Land Surface Emissivity in the Vicinity of the ARM SGP Central Facility R. O. Knuteson, R. G. Dedecker, W. F. Feltz, B. J. Osbourne, H. E. Revercomb, and D. C. Tobin Space Science and Engineering Center University of Wisconsin-Madison Madison, Wisconsin Introduction The University of Wisconsin Space Science and Engineering Center (UW-SSEC) has developed, under National Aeronautics and Space Administration (NASA) funding, a model for the infrared land surface emissivity (LSE) in the vicinity of the U.S. Department of Energy's (DOE) Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) Central Facility (CF) in North Central Oklahoma. The UW-Madison LSE model is part of the ARM best

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets  

NLE Websites -- All DOE Office Websites (Extended Search)

Determination of Ice Water Path Over the ARM SGP Using Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets J. Huang, M. M. Khaiyer, and P. W. Heck Analytical Services & Materials, Inc. Hampton, Virginia P. Minnis and B. Lin Atmospheric Sciences National Aeronautics and Space Administration Langley Research Center Hampton, Virginia T.-F. Fan Science Applications International Corporation Hampton, Virginia Introduction Global information of cloud ice water path (IWP) is urgently needed for testing of global climate models (GCMs) and other applications. Accurate quantification of the IWP is essential for characterizing the hydrological and radiation budget. For example, the reflection of shortwave radiation by ice clouds reduces the solar energy reaching the earth's surface. Ice clouds can also trap the longwave radiation

42

Searching for Global Dimming Evidence at SGP and Update of ARM Submissions to BSRN  

NLE Websites -- All DOE Office Websites (Extended Search)

Searching for Global Dimming Evidence at SGP and Searching for Global Dimming Evidence at SGP and Update of ARM Submissions to BSRN G. Hodges Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder, Colorado Introduction Global dimming, usually defined as a reduction of incoming solar radiation (insolation) at the surface of the earth, is a topic being discussed with increasing frequency. A recent news article on global dimming in the web-based newspaper the Guardian Unlimited seems to have brought this issue to the forefront with scientists and laypeople alike. In fact, there is a special session devoted to global dimming at the upcoming May 17-21 American Geophysical Union (AGU) meeting in Montreal, Canada. The article quotes Atsumu Ohmura and references his findings on this subject.

43

Verification of Patch- and Regional-Scale Energy Balance Estimates Derived from Microwave and Optical Remote Sensing during SGP97  

Science Conference Proceedings (OSTI)

The 1997 Southern Great Plains Hydrology Experiment (SGP97) was designed and conducted to extend surface soil moisture retrieval algorithms based on passive microwave observations to coarser resolutions, larger regions with more diverse ...

William P. Kustas; Thomas J. Jackson; Andrew N. French; J. Ian MacPherson

2001-06-01T23:59:59.000Z

44

A Climatology of Midlatitude Continental Clouds from the ARM SGP Central Facility. Part II: Cloud Fraction and Surface Radiative Forcing  

Science Conference Proceedings (OSTI)

Data collected at the Department of Energy Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Central Facility (SCF) are analyzed to determine the monthly and hourly variations of cloud fraction and radiative forcing between ...

Xiquan Dong; Baike Xi; Patrick Minnis

2006-05-01T23:59:59.000Z

45

DOE - Office of Legacy Management -- Spencer Chemical Co - KS 0-01  

Office of Legacy Management (LM)

KS 0-01 KS 0-01 FUSRAP Considered Sites Site: SPENCER CHEMICAL CO. (KS.0-01 ) Eliminated from further consideration under FUSRAP - an AEC licensed operation Designated Name: Not Designated Alternate Name: Jayhawk Works KS.0-01-1 Location: Pittsburg , Kansas KS.0-01-1 Evaluation Year: 1985 KS.0-01-2 Site Operations: Processed enriched uranium (UF-6) and scrap to produce primarily uranium dioxide (UO-2) under AEC licenses. KS.0-01-3 KS.0-01-4 Site Disposition: Eliminated - No Authority - AEC licensed KS.0-01-2 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Normal and Enriched Uranium; Thorium KS.0-01-6 Radiological Survey(s): Yes KS.0-01-5 Site Status: Eliminated from further consideration under FUSRAP - an AEC licensed operation

46

ARM - Field Campaign - Boundary Layer CO2 Using CW Lidar  

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govCampaignsBoundary Layer CO2 Using CW Lidar govCampaignsBoundary Layer CO2 Using CW Lidar Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer CO2 Using CW Lidar 2005.05.21 - 2005.05.24 Lead Scientist : Michael Dobbs Description Overflights Underway at ACRF Southern Great Plains Site (M.Dobbs/J.Liljegren) Science collaborators at ITT Industries and the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) conducted flights over the Central Facility at ACRF's Southern Great Plains (SGP) site as part of the Climate Sources and Sink (CO2) Intensive Operational Period (IOP), using a CW lidar. The objective of the flights was to validate, by demonstration and comparison with SGP ground observations, the performance of the ITT system when used in conjunction with retrieval

47

Observed and Simulated Cirrus Cloud Properties at the SGP CART Site  

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and Simulated Cirrus Cloud Properties and Simulated Cirrus Cloud Properties at the SGP CART Site A. D. Del Genio and A. B. Wolf National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York G. G. Mace University of Utah Salt Lake City, Utah Introduction Despite their potential importance in a long-term climate change, less is known about cirrus clouds than most other cloud types, for a variety of reasons (Del Genio 2001) including: (1) the difficulty of remotely sensing ice water content (IWC), (2) uncertainty in the identities of ice nuclei and the relative importance of different nucleation processes, (3) significant variations in depth and optical thickness caused by formation and sedimentation of large particles, and (4) our relatively poor documentation of

48

Validation of Satellite-Derived Liquid Water Paths Using ARM SGP Microwave Radiometers  

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Satellite-Derived Liquid Water Paths Using Satellite-Derived Liquid Water Paths Using ARM SGP Microwave Radiometers M. M. Khaiyer and J. Huang Analytical Services & Materials, Inc. Hampton, Virginia P. Minnis, B. Lin, and W. L. Smith, Jr. National Aeronautics and Space Administration Langley Research Center Hampton, Virginia A. Fan Science Applications International Corporation Hampton, Virginia A. Rapp Colorado State University Fort Collins, Colorado Introduction Satellites are useful for monitoring climatological parameters over large domains. They are especially useful for measuring various cloud microphysical and radiative parameters where ground-based instruments are not available. The geostationary operational environmental satellite (GOES) has been used to retrieve cloud and radiative properties over an extended domain centered on the Atmospheric

49

Techniques and Methods Used to Determine the Best Estimate of Radiation Fluxes at SGP Central Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

Techniques and Methods Used to Determine the Techniques and Methods Used to Determine the Best Estimate of Radiation Fluxes at SGP Central Facility Y. Shi and C. N. Long Pacific Northwest National Laboratory Richland, Washington Algorithm and Methodology The Best Estimate Flux value-added product (VAP) processes data started on March 22, 1997, when data from the three central facility (CF) radiometer systems, Solar Infrared Station (SIRS) E13, C1, and baseline surface radiation network (BSRN) (sgpsirs1duttE13.c1, sgpsirs1duttC1.c1, and sgpbsrn1duttC1.c1), were all available. In 2001, the diffuse shortwave (SW) instruments were switched to shaded black and white instruments, and the name BSRN was switched to broadband radiometer station (BRS). Before that time, this VAP uses corrected diffuse SW from the DiffCorr1Dutt VAP as

50

ARM - Field Campaign - Lower Atmospheric Boundary Layer Experiment  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsLower Atmospheric Boundary Layer Experiment govCampaignsLower Atmospheric Boundary Layer Experiment Campaign Links LABLE Website Related Campaigns 2013 Lower Atmospheric Boundary Layer Experiment 2013.05.28, Turner, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Lower Atmospheric Boundary Layer Experiment 2012.09.17 - 2012.11.13 Lead Scientist : David Turner Description Boundary layer turbulence is an important process that is parameterized in most atmospheric numerical models. Turbulence redistributes energy and mass within the boundary layer. Many different characteristics can impact the character of turbulence in the boundary layer, including different surface types, horizontal wind speed and direction, and the vertical temperature structure of the atmosphere. However, there have been few studies that have

51

Towards Development of a Synthesized Database of Spatial and Temporal Surface Spectral Reflectivity Over the ARM SGP CART Area  

NLE Websites -- All DOE Office Websites (Extended Search)

Towards Development of a Synthesized Database of Towards Development of a Synthesized Database of Spatial and Temporal Surface Spectral Reflectivity Over the ARM SGP CART Area A. P. Trishchenko, Y. Luo, R. Latifovic, W. Park, J. Cihlar, and B. Hwang Canada Centre for Remote Sensing Ottawa, Ontario, Canada Z. Li and M. C. Cribb University of Maryland, College Park, Maryland Introduction Surface albedo is a key variable determining the disposition of solar radiation between the surface and the atmosphere. Reliable mapping of surface albedo and improved understanding of radiation interactions at the surface are required for advancing weather forecasting and climate studies. The ground-based observations are limited to a handful of locations sparsely distributed in the South Great Plains (SGP). Frequently, they represent only small-scale features of surface reflective properties and

52

Remotely Controlled, Continuous Observations of Infrared Radiance with the CSIRO/ARM Mark II Radiometer at the SGP CART Site  

NLE Websites -- All DOE Office Websites (Extended Search)

Remotely Controlled, Continuous Observations of Remotely Controlled, Continuous Observations of Infrared Radiance with the CSIRO/ARM Mark II Radiometer at the SGP CART Site C. M. R. Platt and R. T. Austin Department of Atmospheric Science Colorado State University Fort Collins, Colorado C. M. R. Platt and J. A. Bennett Commonwealth Scientific and Industrial Research Organization Atmospheric Research Aspendale, Victoria, Australia Abstract The Commonwealth Scientific and Industrial Research Organization/Atmospheric Radiation Measurement (CSIRO/ARM) Program Mark II infrared (IR) filter radiometer operated continuously at the Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site for a period of five weeks. Data of high quality were obtained by remote operation and data transfer with no evidence of spurious

53

Diurnal Cycle of Convection at the ARM SGP Site: Role of Large-Scale Forcing, Surface Fluxes, and Convective Inhibition  

NLE Websites -- All DOE Office Websites (Extended Search)

Diurnal Cycle of Convection at the ARM SGP Site: Diurnal Cycle of Convection at the ARM SGP Site: Role of Large-Scale Forcing, Surface Fluxes, and Convective Inhibition G. J. Zhang Center for Atmospheric Sciences Scripps Institution of Oceanography La Jolla, California Introduction Atmospheric convection undergoes strong diurnal variation over both land and oceans (Gray and Jacobson 1977; Dai 2001; Nesbitt and Zipser 2003). Because of the nature of the diurnal variation of solar radiation, the phasing of convection with solar radiation has a significant impact on the atmospheric radiation budget and cloud radiative forcing. A number of studies have investigated the possible mechanisms of the diurnal variation of convection (Gray and Jacobson 1977; Randall et al. 1991; Dai et al. 1999; Dai 2001). Yet, in regional and global climate models, the diurnal variation of

54

Cloud properties derived from two lidars over the ARM SGP site  

Science Conference Proceedings (OSTI)

[1] Active remote sensors such as lidars or radars can be used with other data to quantify the cloud properties at regional scale and at global scale (Dupont et al., 2009). Relative to radar, lidar remote sensing is sensitive to very thin and high clouds but has a significant limitation due to signal attenuation in the ability to precisely quantify the properties of clouds with a 20 cloud optical thickness larger than 3. In this study, 10-years of backscatter lidar signal data are analysed by a unique algorithm called STRucture of ATmosphere (STRAT, Morille et al., 2007). We apply the STRAT algorithm to data from both the collocated Micropulse lidar (MPL) and a Raman lidar (RL) at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site between 1998 and 2009. Raw backscatter lidar signal is processed and 25 corrections for detector deadtime, afterpulse, and overlap are applied. (Campbell et al.) The cloud properties for all levels of clouds are derived and distributions of cloud base height (CBH), top height (CTH), physical cloud thickness (CT), and optical thickness (COT) from local statistics are compared. The goal of this study is (1) to establish a climatology of macrophysical and optical properties for all levels of clouds observed over the ARM SGP site 30 and (2) to estimate the discrepancies induced by the two remote sensing systems (pulse energy, sampling, resolution, etc.). Our first results tend to show that the MPLs, which are the primary ARM lidars, have a distinctly limited range where all of these cloud properties are detectable, especially cloud top and cloud thickness, but even actual cloud base especially during summer daytime period. According to the comparisons between RL and MPL, almost 50% of situations show a signal to noise ratio too low (smaller than 3) for the MPL in order to detect clouds higher than 7km during daytime period in summer. Consequently, the MPLderived annual cycle of cirrus cloud base (top) altitude is biased low, especially for daylight periods, compared with those derived from the RL data, which detects 5 cloud base ranging from 7.5 km in winter to 9.5 km in summer (and tops ranging from 8.6 to 10.5 km). The optically thickest cirrus clouds (COT>0.3) reach 50% of the total population for the Raman lidar and only 20% for the Micropulse lidar due to the difference of pulse energy and the effect of solar irradiance contamination. A complementary study using the cloud fraction 10 derived from the Micropulse lidar for clouds below 5 km and from the Raman lidar for cloud above 5 km allows for better estimation of the total cloud fraction between the ground and the top of the atmosphere. This study presents the diurnal cycle of cloud fraction for each season in comparisons with the Long et al. (2006) cloud fraction calculation derived from radiative flux analysis.

Dupont, Jean-Charles; Haeffelin, Martial; Morille, Y.; Comstock, Jennifer M.; Flynn, Connor J.; Long, Charles N.; Sivaraman, Chitra; Newsom, Rob K.

2011-02-16T23:59:59.000Z

55

Surface Di-directional Reflectance Properties Over the ARM SGP Area from Satellite Multi-Platform Observations  

NLE Websites -- All DOE Office Websites (Extended Search)

Bi-Directional Reflectance Properties Bi-Directional Reflectance Properties Over the ARM SGP Area from Satellite Multi-Platform Observations Y. Luo, A. P. Trishchenko, and R. Latifovic Canada Centre for Remote Sensing Natural Resources Canada Ottawa, Ontario, Canada Z. Li Earth System Science Interdisciplinary Center University of Maryland College Park, Maryland Introduction Surface albedo is an important parameter in atmospheric radiation research. Good knowledge of surface bi-directional reflectance distribution function (BRDF) is essential in order to obtain the hemispheric reflectance (albedo) using data from satellite systems, which only view the ground at particular angles. Linear kernel-driven BRDF models have been commonly used for simple operational implementation of

56

A new limit on the CP violating decay KS -> 3pi0 with the KLOE experiment  

E-Print Network (OSTI)

We have carried out a new direct search for the CP violating decay KS -> 3pi0 with 1.7 fb^-1 of e+e- collisions collected by the KLOE detector at the phi-factory DAFNE. We have searched for this decay in a sample of about 5.9 x 10^8 KS KL events tagging the KS by means of the KL interaction in the calorimeter and requiring six prompt photons. With respect to our previous search, the analysis has been improved by increasing of a factor four the tagged sample and by a more effective background rejection of fake KS tags and spurious clusters. We find no candidates in data and simulated background samples, while we expect 0.12 standard model events. Normalizing to the number of KS -> 2pi0 events in the same sample, we set the upper limit on BR(KS -> 3pi0 < 2.6 x 10^-8 at 90% C.L., five times lower than the previous limit. We also set the upper limit on the eta_000 parameter, |eta_000 | < 0.0088 at 90% C.L., improving by a factor two the latest direct measurement.

Babusci, D; Balwierz-Pytko, I; Bencivenni, G; Bini, C; Bloise, C; Bossi, F; Branchini, P; Budano, A; Balkestahl, L Caldeira; Capon, G; Ceradini, F; Ciambrone, P; Curciarello, F; Czerwinski, E; Dane, E; De Leo, V; De Lucia, E; De Robertis, G; De Santis, A; Di Domenico, A; Di Donato, C; Di Salvo, R; Domenici, D; Erriquez, O; Fanizzi, G; Fantini, A; Felici, G; Fiore, S; Franzini, P; Gauzzi, P; Giardina, G; Giovannella, S; Gonnella, F; Graziani, E; Happacher, F; Heijkenskjold, L; Hoistad, B; Iafolla, L; Jacewicz, M; Johansson, T; Kacprzak, K; Kupsc, A; Lee-Franzini, J; Leverington, B; Loddo, F; Loffredo, S; Mandaglio, G; Martemianov, M; Martini, M; Mascolo, M; Messi, R; Miscetti, S; Morello, G; Moricciani, D; Moskal, P; Nguyen, F; Passeri, A; Patera, V; Longhi, I Prado; Ranieri, A; Redmer, C F; Santangelo, P; Sarra, I; Schioppa, M; Sciascia, B; Silarski, M; Taccini, C; Tortora, L; Venanzoni, G; Wislicki, W; Wolke, M; Zdebik, J

2013-01-01T23:59:59.000Z

57

Satellite and Surface Data Synergy for Developing a 3D Cloud Structure and Properties Characterization Over the ARM SGP. S...  

NLE Websites -- All DOE Office Websites (Extended Search)

Satellite and Surface Data Synergy for Developing Satellite and Surface Data Synergy for Developing a 3D Cloud Structure and Properties Characterization Over the ARM SGP Site Stage 1: Cloud Amounts, Optical Depths, and Cloud Heights Reconciliation I. Genkova and C. N. Long Pacific Northwest National Laboratory Richland, Washington P. W. Heck Analytical Services & Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Langley Research Center Hampton, Virginia Introduction One of the primary Atmospheric Radiation Measurement (ARM) Program objectives is to obtain measurements applicable to the development of models for better understanding of radiative processes in the atmosphere. We address this goal by building a three-dimensional (3D) characterization of the

58

Asymmetry in the Diurnal Cycle of Atmospheric Downwelling Radiation at the ARM SGP CF Site Over 1995-2001 Period  

NLE Websites -- All DOE Office Websites (Extended Search)

Asymmetry in the Diurnal Cycle of Atmospheric Asymmetry in the Diurnal Cycle of Atmospheric Downwelling Radiation at the ARM SGP CF Site Over 1995-2001 Period A. P. Trishchenko Canada Centre for Remote Sensing Ottawa, Ontario, Canada Introduction The shape of the diurnal cycle of atmospheric downwelling radiation is an important climatic feature of cloud-radiation interactions and atmospheric properties. Adequate characterization of this diurnal cycle is critical for accurate determination of monthly and seasonal radiation budgets from a limited data sampling. This is especially important for establishing the optimal sampling and temporal interpolation schemes employed in satellite radiation budget missions, such as Earth Radiation Budget Experiment (ERBE), Scanner for Radiation Budget (ScaRaB), and Clouds and Earth's Radiant Energy System

59

New Visible to Broadband Shortwave Conversions for Deriving Albedos from GOES-8 Over the ARM-SGP  

NLE Websites -- All DOE Office Websites (Extended Search)

New Visible to Broadband Shortwave Conversions for New Visible to Broadband Shortwave Conversions for Deriving Albedos from GOES-8 Over the ARM-SGP V. Chakrapani, D. R. Doelling, and M. M. Khaiyer Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Langley Research Center Hampton, Virginia Introduction The radiation budget at the top of the atmosphere (TOA) is a quantity of fundamental importance to the Atmospheric Radiation Measurement (ARM) Program. Thus, it is necessary to measure the radiation budget components, broadband shortwave (SW) albedo and outgoing longwave radiation, as accurately as possible. Measurement of TOA broadband albedos over the ARM surface sites has only been possible since the advent of Clouds and the Earth's Radiant Energy System (CERES; Wielicki et al.

60

Techniques and Methods Used to Determine the Aerosol Best Estimate Value-Added Product at SGP Central Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

Determine the Aerosol Best Estimate Value-Added Product at SGP Central Facility C. Sivaraman, D. D. Turner, and C. J. Flynn Pacific Northwest National Laboratory Richland, Washington Objective Profiles of aerosol optical properties are needed for radiative closure exercises such as the broadband heating rate profile (BBHRP) project (Mlawer et al. 2002) and the Shortwave Quality Measurement Experiment (QME). Retrieving cloud microphysical properties using radiation measurements in the shortwave, such as the spectral retrieval technique described in Daniel et al. (2002), also require the optical properties of the aerosols so that they can be accounted for in the retrieval process. The objective of the aerosol best estimate (ABE) value-added procedure (VAP) is to provide profiles of

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Month-Long 2D Cloud-Resolving Model Simulation and Resultant Statistics of Cloud Systems Over the ARM SGP  

NLE Websites -- All DOE Office Websites (Extended Search)

Month-Long 2D Cloud-Resolving Model Simulation Month-Long 2D Cloud-Resolving Model Simulation and Resultant Statistics of Cloud Systems Over the ARM SGP X. Wu Department of Geological and Atmospheric Sciences Iowa State University Ames, Iowa X.-Z. Liang Illinois State Water Survey University of Illinois Urbana-Champaign, Illinois Introduction The cloud-resolving model (CRM) has recently emerged as a useful tool to develop improved representations of convections, clouds, and cloud-radiation interactions in general circulation models (GCMs). In particular, the fine spatial resolution allows the CRM to more realistically represent the detailed structure of cloud systems, including cloud geometric and radiative properties. The CRM simulations thus provide unique and comprehensive datasets, based on which more realistic GCM

62

Comparison of improved Aura Tropospheric Emission Spectrometer (TES) CO{sub 2} with HIPPO and SGP aircraft profile measurements  

SciTech Connect

Comparisons are made between mid-tropospheric Tropospheric Emission Spectrometer (TES) carbon dioxide (CO{sub 2}) satellite measurements and ocean profiles from three Hiaper Pole-to-Pole Observations (HIPPO) campaigns and land aircraft profiles from the United States Southern Great Plains (SGP) Atmospheric Radiation Measurement (ARM) site over a 4-yr period. These comparisons are used to characterize the bias in the TES CO{sub 2} estimates and to assess whether calculated and actual uncertainties and sensitivities are consistent. The HIPPO dataset is one of the few datasets spanning the altitude range where TES CO{sub 2} estimates are sensitive, which is especially important for characterization of biases. We find that TES CO{sub 2} estimates capture the seasonal and latitudinal gradients observed by HIPPO CO{sub 2} measurements; actual errors range from 0.8–1.2 ppm, depending on the campaign, and are approximately 1.4 times larger than the predicted errors. The bias of TES versus HIPPO is within 0.85 ppm for each of the 3 campaigns; however several of the sub-tropical TES CO{sub 2} estimates are lower than expected based on the calculated errors. Comparisons of aircraft flask profiles, which are measured from the surface to 5 km, to TES CO{sub 2} at the SGP ARM site show good agreement with an overall bias of 0.1 ppm and rms of 1.0 ppm. We also find that the predicted sensitivity of the TES CO{sub 2} estimates is too high, which results from using a multi-step retrieval for CO{sub 2} and temperature. We find that the averaging kernel in the TES product corrected by a pressure-dependent factor accurately reflects the sensitivity of the TES CO{sub 2} product.

Kulawik, S. S.; Worden, J. R.; Wofsy, S. C.; Biraud, S. C.; Nassar, R.; Jones, D. B.A.; Olsen, E. T.; Osterman, G. B.

2012-02-01T23:59:59.000Z

63

Control of Well Ks-8 in the Kilauea Lower East Rift Zone | Open Energy  

Open Energy Info (EERE)

of Well Ks-8 in the Kilauea Lower East Rift Zone of Well Ks-8 in the Kilauea Lower East Rift Zone Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Control of Well Ks-8 in the Kilauea Lower East Rift Zone Abstract In June 1991, a well located in Hawaii kicked and unloaded at 3,476 ft (1,059 m). This well was estimatedto have a possible bottomhole temperature of 650°F (343°C)and a reservoir pressure approaching 2,300 psi 5,858 Immediate attempts to kill the well were unsuccessful, and the long processof well control was started. Besides the harsh geological and reservoir conditions encountered,the scarce availability of materials in a remote location and long distance transportation of necessary equipment figured heavily in to the time delay of the final kill procedure of the

64

File:USDA-CE-Production-GIFmaps-KS.pdf | Open Energy Information  

Open Energy Info (EERE)

KS.pdf KS.pdf Jump to: navigation, search File File history File usage Kansas Ethanol Plant Locations Size of this preview: 776 × 600 pixels. Full resolution ‎(1,650 × 1,275 pixels, file size: 317 KB, MIME type: application/pdf) Description Kansas Ethanol Plant Locations Sources United States Department of Agriculture Related Technologies Biomass, Biofuels, Ethanol Creation Date 2010-01-19 Extent State Countries United States UN Region Northern America States Kansas External links http://www.nass.usda.gov/Charts_and_Maps/Ethanol_Plants/ File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 16:14, 27 December 2010 Thumbnail for version as of 16:14, 27 December 2010 1,650 × 1,275 (317 KB) MapBot (Talk | contribs) Automated bot upload

65

Measurement and Modeling of Vertically Resolved Aerosol Optical Properties and Radiative Fluxes Over the ARM SGP Site During the May 2003 Aerosol IOP  

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Measurement and Modeling Measurement and Modeling of Vertically Resolved Aerosol Optical Properties and Radiative Fluxes Over the ARM SGP Site During the May 2003 Aerosol IOP B. Schmid and J. Redemann Bay Area Environmental Research Institute National Aeronautics and Space Administration Ames Research Center Moffett Field, California W. P. Arnott Desert Research Institute Reno, Nevada A. Bucholtz and J. Reid Naval Research Laboratory Monterey, California P. Colarco Earth System Science Interdisciplinary Center University of Maryland College Park, Maryland D. Covert and R. Elleman University of Washington Seattle, Washington J. Eilers, P. Pilewskie, and A. Strawa National Aeronautics and Space Administration Ames, Research Center Moffett Field, California R. A. Ferrare

66

Benchmarks for the New-Physics Search through CP Violation in B^0->pi^0 K_S  

E-Print Network (OSTI)

Using isospin relations, we predict the Standard-Model correlation between S_{pi^0 K_S}=(sin 2beta)_{pi^0 K_S} and A_{pi^0 K_S}, the mixing-induced and direct CP asymmetries of B^0-> pi^0 K_S. The calculation uses flavour SU(3) only to fix the isospin-3/2 amplitude through the B^\\pm->pi^\\pm pi^0 branching ratio, and thus has a small irreducible theoretical error. It can reach percent level precision thanks to expected future lattice-QCD progress for the calculation of the relevant SU(3)-breaking form-factor ratio, and serves as a benchmark for new-physics searches. We obtain an interesting picture in the A_{pi^0 K_S} - S_{pi^0 K_S} plane, where the current experimental data show a discrepancy with the Standard Model, and comment on the direct CP asymmetries of B^0->pi^-K^+ and B^+ -> pi^0 K^+. A modified electroweak penguin with a large new CP-violating phase can explain the discrepancy and allows us to accommodate also the corresponding data for other b->s penguin-dominated decays.

Robert Fleischer; Sebastian Jager; Dan Pirjol; Jure Zupan

2008-06-18T23:59:59.000Z

67

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Gasoline and Diesel Fuel Update (EIA)

176, "Annual Report of Natural and Supplemental Gas Supply and Disposition." NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA ME MI MA MD MN MS MT MO NE ND OH NV NM NY...

68

Using remotely sensed planetary boundary layer variables as estimates of areally averaged heat flux  

SciTech Connect

Homogeneity across the Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site is an issue of importance to all facets of the Atmospheric Radiation Measurements (ARM) program. The degree to which measurements at the central facility can be used to verify, improve, or develop relationships in radiative flux models that are subsequently used in Global Circulation Models (GCMs), for example, is tied directly to the representativeness of the local measurements at the central facility for the site as a whole. The relative variation of surface energy budget terms over a 350- km X 400km domain such as the SGP CART site can be extremely large. The Planetary Boundary Layer (PBL) develops as a result of energy inputs from widely varying surfaces. The lower atmosphere effectively integrates the local inputs; measurements of PBL structure can potentially be used for estimates of surface heat flux over scales on the order of tens of kilometers. This project is focusing on two PBL quantities that are intimately tied to the surface heat flux: (1) the height of the mixed layer, z, that grows during daytime due to sensible heat flux input from the surface; and (2) the convective velocity scale, normally a scaling parameter defined by the product of the sensible heat flux and z, but in this case defined by coherent structures that connect the surface layer and the capping inversion that defines z.

Coulter, R.L.; Martin, T.J.; Holdridge, D.J.

1995-06-01T23:59:59.000Z

69

RACORO Extended-Term Aircraft Observations of Boundary-Layer Clouds  

SciTech Connect

A first-of-a-kind, extended-term cloud aircraft campaign was conducted to obtain an in-situ statistical characterization of boundary-layer clouds needed to investigate cloud processes and refine retrieval algorithms. Coordinated by the Atmospheric Radiation Measurement (ARM) Aerial Facility (AAF), the Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations (RACORO) field campaign operated over the ARM Southern Great Plains (SGP) site from 22 January to 30 June 2009, collecting 260 h of data during 59 research flights. A comprehensive payload aboard the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) Twin Otter aircraft measured cloud microphysics, solar and thermal radiation, aerosol properties, and atmospheric state parameters. Proximity to the SGP's extensive complement of surface measurements provides ancillary data that supports modeling studies and enables evaluating a variety of surface retrieval algorithms. The five-month duration enabled sampling a range of conditions associated with the seasonal transition from winter to summer. Although about two-thirds of the cloud flights occurred in May and June, boundary-layer cloud fields were sampled under a variety of environmental and aerosol conditions, with about 75% of the flights occurring in cumulus and stratocumulus. Preliminary analyses show how these data are being used to analyze cloud-aerosol relationships, determine the aerosol sizes that are responsible for nucleating cloud drops, characterize the horizontal variability of the cloud radiative impacts, and evaluate air-borne and surface-based cloud property retrievals. We discuss how conducting an extended-term campaign requires a simplified operating paradigm that is different from that used for typical, short-term, intensive aircraft field programs.

Vogelmann, A. M.; McFarquhar, Greg; Ogren, John A.; Turner, David D.; Comstock, Jennifer M.; Feingold, G.; Long, Charles N.; Jonsson, Haf; Bucholtz, Anthony; Collins, Donald R.; Diskin, G. S.; Gerber, H.; Lawson, Paul; Woods, Roy; Andrews, Elizabeth; Yang, Hee-Jung; Chiu, Christine J.; Hartsock, Daniel; Hubbe, John M.; Lo, Chaomei; Marshak, A.; Monroe, Justin; McFarlane, Sally A.; Schmid, Beat; Tomlinson, Jason M.; Toto, Tami

2012-06-30T23:59:59.000Z

70

Inclusive production of $\\Lambda$, $K^0_s$ and exotic narrow resonances for systems $K_s^0 p$, $K_s^0 \\Lambda$, $\\Lambda p$ from p+propane interactions at 10 GeV/c  

E-Print Network (OSTI)

Experimental data from the 2m propane bubble chamber for production of $\\Lambda$, $K^0_s$ have been used to search of exotic baryon states, in the $K_s^0 p$, $K_s^0 \\Lambda$ and $\\Lambda p$ decay mode for the reaction p+propane at 10 GeV/c. The estimation of experimental inclusive cross sections for $\\Lambda$ and $K^0_s$ production in the p$^{12}C$ collision is equal to $\\sigma_{\\Lambda}$= 13.3$\\pm$1.7 mb and $\\sigma_{K^0_s}$= 3.8$\\pm$0.6 mb, respectively. The measured $\\Lambda /\\pi^+$ ratio from pC reaction is equal to (5.3$\\pm0.8)*10^{-2}$. The experimental $\\Lambda /\\pi^+$ ratio from the pC reaction is approximately two times larger than the $\\Lambda /\\pi^+$ ratio simulated by FRITIOF model from the pC reaction. The invariant mass spectrum $\\Lambda K^0_s$ registered narrow peaks in regions of 1750 and 1795 MeV/$c^2$. The statistical significance of these peaks has been estimated as 5.6 and 3.3 S.D., respectively. These would be candidates for the $N^0$ or the $\\Xi^0$ pentaquark states. The $pK^0_s$ invaria...

Aslanyan, P Z

2005-01-01T23:59:59.000Z

71

ARM - SGP Radiometric Calibration Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

pyrgeometers. The ARM Climate Research Facility requires accurate measurements of solar radiation from radiometers used in ground-based networks and airborne instrument...

72

Adiabatic Eastern Boundary Currents  

Science Conference Proceedings (OSTI)

The dynamics of the eastern boundary current of a high-resolution, idealized model of oceanic circulation are analyzed and interpreted in terms of residual mean theory. In this framework, it is clear that the eastern boundary current is adiabatic ...

Paola Cessi; Christopher L. Wolfe

2013-06-01T23:59:59.000Z

73

RELAP5/MOD3.2 Assessment Using CHF Data from the KS-1 and V-200 Experiment Facilities  

SciTech Connect

The RELAP/MOD3.2 computer code has been assessed using rod bundle critical heat flux data from the KS-1 and V-200 facilities. This work was performed as part of the U.S. Department of Energy’s International Nuclear Safety Program, and is part of the effort addressing the capability of the RELAP5/MOD3.2 code to model transients in Soviet-designed reactors. Designated VVER Standard Problem 7, these tests addressed one of the important phenomena related to VVER behavior that the code needs to simulate well, core heat transfer. The code was judged to be in minimal agreement with the experiment data, consistently overpredicting the measured critical heat flux. It is recommended that a model development effort be undertaken to develop a critical heat flux model for RELAP5 that better represents the behavior in VVER rod bundles.

Bayless, Paul David

2001-07-01T23:59:59.000Z

74

Membranes with a boundary  

E-Print Network (OSTI)

We investigate the recently developed theory of multiple membranes. In particular, we consider open membranes, i.e. the theory defined on a membrane world volume with a boundary. We first restrict our attention to the gauge sector of the theory. We obtain a boundary action from the Chern-Simons terms. Secondly, we consider the addition of certain boundary terms to various Chern-Simons theories coupled to matter. These terms ensure the full bulk plus boundary action has the correct amount of supersymmetry. For the ABJM model, this construction motivates the inclusion of a boundary quartic scalar potential. The boundary dynamics obtained from our modified theory produce Basu-Harvey type equations describing membranes ending on a fivebrane. The ultimate goal of this work is to throw light on the theory of fivebranes using the theory of open membranes.

David S Berman; Daniel C Thompson

2009-04-01T23:59:59.000Z

75

Grain Boundaries and Interfaces  

Science Conference Proceedings (OSTI)

Oct 8, 2012 ... Applying this algorithm to symmetric tilt grain boundaries offers direct links ... recognized role as an influential component of microstructure.

76

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Gasoline and Diesel Fuel Update (EIA)

0.00-1.99 0.00-1.99 2.00-2.99 3.00-3.99 4.00-4.99 5.00-5.99 6.00-6.99 7.00+ NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA ME MI MA MD MN MS MT MO NE ND OH NV NM NY NH NC OK OR PA RI SC SD TN TX UT VT WA WV WI AZ VA DC 0.00-1.99 2.00-2.99 3.00-3.99 4.00-4.99 5.00-5.99 6.00-6.99 7.00+ 18. Average Price of Natural Gas Delivered to U.S. Onsystem Industrial Consumers, 1996 (Dollars per Thousand Cubic Feet) Figure 19. Average Price of Natural Gas Delivered to U.S. Electric Utilities, 1996 (Dollars per Thousand Cubic Feet) Figure Sources: Federal Energy Regulatory Commission (FERC), Form FERC-423, "Monthly Report of Cost and Quality of Fuels for Electric Plants," and Energy Information Administration (EIA), Form EIA-176, "Annual Report of Natural and Supplemental Gas Supply and Disposition." Note: In 1996, consumption of natural gas for agricultural use

77

SLE boundary visits  

E-Print Network (OSTI)

We study the probabilities with which chordal Schramm-Loewner Evolutions (SLE) visit small neighborhoods of boundary points. We find explicit formulas for general chordal SLE boundary visiting probability amplitudes, also known as SLE boundary zig-zags or order refined SLE multi-point Green's functions on the boundary. Remarkably, an exact answer can be found to this important SLE question for an arbitrarily large number of marked points. The main technique employed is a spin chain - Coulomb gas correspondence between tensor product representations of a quantum group and functions given by Dotsenko-Fateev type integrals. We show how to express these integral formulas in terms of regularized real integrals, and we discuss their numerical evaluation. The results are universal in the sense that apart from an overall multiplicative constant the same formula gives the amplitude for many different formulations of the SLE boundary visit problem. The formula also applies to renormalized boundary visit probabilities for interfaces in critical lattice models of statistical mechanics: we compare the results with numerical simulations of percolation, loop-erased random walk, and Fortuin-Kasteleyn random cluster models at Q=2 and Q=3, and find good agreement.

Niko Jokela; Matti Järvinen; Kalle Kytölä

2013-11-10T23:59:59.000Z

78

Print http://us.mg4.mail.yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency  

E-Print Network (OSTI)

.yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency From: Michael Klemen (wind4energy;Print http://us.rng4.mail.yahoo.comlneo/launch?.rand=deOsgko4ks4 energy in the wind is proportional://www.ndsu.edu/ndsu/klemen/Perfect_Turbine.htm You can see that for an ideal real life wind turbine ("good turbine") the increase in energy

79

A Simulation Study of Shallow Moist Convection and Its Impact on the Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

By comparing regional model simulations with the observations collected at the southern Great Plains (SGP) site and the tropical western Pacific (TWP) Nauru site of the Atmospheric Radiation Measurement (ARM) project, this paper evaluates the ...

Ping Zhu; Christopher S. Bretherton

2004-10-01T23:59:59.000Z

80

Deformation and Transitions at Grain Boundaries  

Science Conference Proceedings (OSTI)

Formation of cell-wall structure during deformation • Intragranular boundaries: GNBs, IDBs, cell-block boundaries, etc. ... Hot Spots and Grain Boundaries.

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Stratigraphic Boundaries | Open Energy Information  

Open Energy Info (EERE)

Stratigraphic Boundaries Stratigraphic Boundaries Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Stratigraphic Boundaries Dictionary.png Stratigraphic Boundaries: No definition has been provided for this term. Add a Definition Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones Apex or Salient of Normal Fault Fault Intersection Accommodation Zone Displacement Transfer Zone Pull-Apart in Strike-Slip Fault Zone Intrusion Margins and Associated Fractures Stratigraphic Boundaries Fissure Swarms Caldera Rim Margins Lithologically Controlled Hydrothermal circulation may occur at the contacts between different lithologies. Examples

82

Boundary stabilization of transmission problems  

E-Print Network (OSTI)

We study the transmission problem in bounded domains with dissipative boundary conditions. Under some natural assumptions, we prove uniform bounds of the corresponding resolvents on the real axis at high frequency, and as a consequence, we obtain free of eigenvalues regions. As an application, we get exponential decay of the energy of the solutions of the correpsonding mixed boundary value problems.

Fernando Cardoso; Georgi Vodev

2009-10-20T23:59:59.000Z

83

SGP-TR-32 STANFORD GEOTHERMAL PROGRAM  

E-Print Network (OSTI)

to estimate the number of adsorption layers, the BET cell shown in Fig. 4 has already been used to determine \\ % SAMPLE HOLDER SAS CYLINDER FIGURE 4, BET CELL USED TO DETERMINE ROCK SURFACE AREA 6 #12;.-c 0- c? a =' m by hydraulic fracturing by LASL in the hot, dry rock experiment in New Mexico. The results of this first 75-day

Stanford University

84

An Evaluation of Boundary Conditions for Modeling Urban Boundary Layers  

DOE Green Energy (OSTI)

Numerical modeling of the urban boundary layer is complicated by the need to describe airflow patterns outside of the computational domain. These patterns have an impact on how successfully the simulation is able to model the turbulence associated with the urban boundary layer. This talk presents experiments with the model boundary conditions for simulations that were done to support two Department of Energy observational programs involving the Salt Lake City basin. The Chemical/Biological Non-proliferation Program (CBNP) is concerned with the effects of buildings on influencing dispersion patterns in urban environments. The Vertical Transport and Mixing Program (VTMX) investigating mixing mechanisms in the stable boundary layer and how they are influenced by the channeling caused by drainage flows or by obstacles such as building complexes. Both of these programs are investigating the turbulent mixing caused by building complexes and other urban obstacles.

Calhoun, R.J.; Chan, S.T.; Lee, R.L.

2000-05-18T23:59:59.000Z

85

Real-Time Cardiac Imaging at 3 Tesla K.S. NAYAK, C.H. CUNNINGHAM, J.M. SANTOS, J.M. PAULY, AND D.G. NISHIMURA  

E-Print Network (OSTI)

Real-Time Cardiac Imaging at 3 Tesla K.S. NAYAK, C.H. CUNNINGHAM, J.M. SANTOS, J.M. PAULY, AND D are shown in Figure 2. Conclusions We have demonstrated real-time cardiac imaging at 3 Tesla with high SNR

Nayak, Krishna

86

The Method of Boundary Perturbation,  

NLE Websites -- All DOE Office Websites (Extended Search)

Method of Boundary Perturbation, Method of Boundary Perturbation, and Its Application to Wakefield Calculationst Weiren Chou+ Advanced Photon Source Argonne National Laboratory 9700 S. Cass Ave. Argonne, IL 60439 USA Spring Meeting of The American Physical Society Division of Physics of Beams Washington, D.C. April 16-19, 1990 tWork supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract W-31-109-ENG-38. tPresent address: SSC Laboratory, Accelerator Division, MS-I046, 2550 Beckleymeade Ave., Dallas, TX 75237, USA. LS-/~ Boundary Perturbation, and Its Application to Wakefield Calculations ABSTRACT The boundary perturbation method, suggested by Zhang and, independently, by Chatard-Moulin, Cooper, and their colleagues, is employed to the wakefield cal-

87

Modeling the Benthic Boundary Layer  

Science Conference Proceedings (OSTI)

A second-order turbulence closure model is used to study the development of the benthic boundary layer. Results are presented on the effects of a time-dependent oscillatory forcing flow and an initially stably stratified density gradient. Using ...

K. J. Richards

1982-05-01T23:59:59.000Z

88

Grain-boundaries and Triple Junctions  

Science Conference Proceedings (OSTI)

Mar 14, 2012 ... For each tilt angle, the perfect boundary is created, as well as one containing a ... The stimulation of migration of general boundary by GBS is ...

89

Grain boundary segregation of carbon in iron  

Science Conference Proceedings (OSTI)

Excess carbon was present near grain boundaries in specimens equilibrated at ... the amount of carbon near the grain boundaries was found to decrease as the

90

Investigating Grain Boundary Structure-Kinetic Property ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Grain boundary energy landscapes contain all the information that is required to describe the kinetic behavior of grain boundaries (GBs).

91

Modeling open boundaries in dissipative MHD simulation  

Science Conference Proceedings (OSTI)

The truncation of large physical domains to concentrate computational resources is necessary or desirable in simulating many natural and man-made plasma phenomena. Three open boundary condition (BC) methods for such domain truncation of dissipative magnetohydrodynamics ... Keywords: Approximate Riemann, Artificial boundary, Calderon method, Dissipative, Lacuna, Lacunae, MHD, Magnetohydrodynamics, Non-reflecting boundary, Nonlinear, Open boundary, hyperbolic-parabolic

E. T. Meier; A. H. Glasser; V. S. Lukin; U. Shumlak

2012-04-01T23:59:59.000Z

92

FLARING SOLAR HALE SECTOR BOUNDARIES  

SciTech Connect

The sector structure that organizes the magnetic field of the solar wind into large-scale domains has a clear pattern in the photospheric magnetic field as well. The rotation rate, 27-28.5 days, implies an effectively rigid rotation originating deeper in the solar interior than the sunspots. The photospheric magnetic field is known to be concentrated near that portion (the Hale boundary) in each solar hemisphere, where the change in magnetic sector polarity matches that between the leading and following sunspot polarities in active regions in the respective hemispheres. We report here that flares and microflares also concentrate at the Hale boundaries, implying that flux emergence and the creation of free magnetic energy in the corona also have a direct cause in the deep interior.

Svalgaard, L. [HEPL, Stanford University, Stanford, CA 94304 (United States); Hannah, I. G.; Hudson, H. S., E-mail: leif@leif.org [School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ (United Kingdom)

2011-05-20T23:59:59.000Z

93

Boundary determinations for trivariate solids  

Science Conference Proceedings (OSTI)

The trivariate tensor-product B-spline solid is a direct extension of the B-spline patch and has been shown to be useful in the creation and visualization of free-form geometric solids. Visualizing these solid objects requires the determination of the boundary surface of the solid, which is a combination of parametric and implicit surfaces. This paper presents a method that determines the implicit boundary surface by examination of the Jacobian determinant of the defining B-spline function. Using an approximation to this determinant, the domain space is adaptively subdivided until a mesh can be determined such that the boundary surface is close to linear in the cells of the mesh. A variation of the marching cubes algorithm is then used to draw the surface. Interval approximation techniques are used to approximate the Jacobian determinant and to approximate the Jacobian determinant gradient for use in the adaptive subdivision methods. This technique can be used to create free-form solid objects, useful in geometric modeling applications.

Duchaineau, M; Joy, K I

1999-05-14T23:59:59.000Z

94

Monsoon Trough Boundary Layer Experiment (MONTBLEX)  

Science Conference Proceedings (OSTI)

The Monsoon Trough Boundary Layer Experiment (MONTBLEX) is a multi-institutional, all-India coordinated program to study the atmospheric boundary-layer processes in the monsoon trough (MT) area of northern India. The experiment is being organized ...

Malti Goel; H. N. Srivastava

1990-11-01T23:59:59.000Z

95

Disturbances along the Arizona Monsoon Boundary  

Science Conference Proceedings (OSTI)

The possibility of disturbances along the boundary between two air masses in the southwestern United States and northwestern Mexico during the summer is examined. This boundary is an approximately north-south confluent zone resulting from the ...

Thomas J. Moore; Robert L. Gall; Thomas C. Adang

1989-05-01T23:59:59.000Z

96

Large-Eddy Boundary Layer Entrainment  

Science Conference Proceedings (OSTI)

A series of large-eddy simulations have been performed to explore boundary layer entrainment under conditions of a strongly capped inversion layer with the boundary layer dynamics driven dominantly by buoyant forcing. Different conditions ...

D. C. Lewellen; W. S. Lewellen

1998-08-01T23:59:59.000Z

97

Ocean Boundary Mixing during Ekman Layer Arrest  

Science Conference Proceedings (OSTI)

As a water parcel comes into contact with an ocean boundary, energy is dissipated within the boundary layer with some fraction directed into vertical mixing. In a stratified flow this increases the potential energy associated with the density ...

Scott A. Condie

1999-12-01T23:59:59.000Z

98

The properties of mixed reality boundaries  

Science Conference Proceedings (OSTI)

Mixed reality boundaries establish transparent windows between physical and virtual spaces. We introduce a set of properties that allow such boundaries to be configured to support different styles of co-operative activity. These properties are grouped ...

Boriana Koleva; Steve Benford; Chris Greenhalgh

1999-09-01T23:59:59.000Z

99

Beyond the no-slip boundary condition  

E-Print Network (OSTI)

This paper offers a simple macroscopic approach to the question of the slip boundary condition to be imposed upon the tangential component of the fluid velocity at a solid boundary. Plausible reasons are advanced for ...

Brenner, Howard

100

The GATE Boundary Layer Instrumentation System (BLIS)  

Science Conference Proceedings (OSTI)

A tethered sonde, the Boundary Layer Instrument System (BLIS), was designed for use from shipboard platforms in the GARP Atlantic Tropical Experiment (GATE). This system was able to monitor the thermal and kinematic properties of the boundary ...

Donald P. Wylie; Chester F. Ropelewski

1980-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

SLE($?,?$)and Boundary Coulomb Gas  

E-Print Network (OSTI)

We consider the coulomb gas model on the upper half plane with different boundary conditions, namely Drichlet, Neuman and mixed. We related this model to SLE($\\kappa,\\rho$) theories. We derive a set of conditions connecting the total charge of the coulomb gas, the boundary charges, the parameters $\\kappa$ and $\\rho$. Also we study a free fermion theory in presence of a boundary and show with the same methods that it would lead to logarithmic boundary changing operators.

S. Moghimi-Araghi; M. A. Rajabpour; S. Rouhani

2005-08-07T23:59:59.000Z

102

Positive solutions for a class of boundary-value problems with integral boundary conditions  

Science Conference Proceedings (OSTI)

This paper investigates the existence and multiplicity of positive solutions for a class of nonlinear boundary-value problems of fourth-order differential equations with integral boundary conditions. The arguments are based upon a specially constructed ... Keywords: Boundary-value problem, Existence, Fixed-point theorem, Integral boundary conditions, Positive solution

Xuemei Zhang; Weigao Ge

2009-07-01T23:59:59.000Z

103

Geometric Boundary Data for the Gravitational Field  

E-Print Network (OSTI)

An outstanding issue in the treatment of boundaries in general relativity is the lack of a local geometric interpretation of the necessary boundary data. For the Cauchy problem, the initial data is supplied by the 3-metric and extrinsic curvature of the initial Cauchy hypersurface.. This Cauchy data determines a solution to Einstein's equations which is unique up to a diffeomorphism. Here, we show how three pieces of boundary data, which are associated locally with the geometry of the boundary, likewise determine a solution of the initial-boundary value problem which is unique up to a diffeomorphism. One piece of this data, constructed from the extrinsic curvature of the boundary, determines the dynamical evolution of the boundary. The other two pieces constitute a conformal class of rank-2, positive definite metrics, which represent the two gravitational degrees of freedom.

H-O. Kreiss; J. Winicour

2013-02-04T23:59:59.000Z

104

Grain Boundary and Intragranular Deformations during High ...  

Science Conference Proceedings (OSTI)

boundary sliding (GBS) was quantified by measuring microgrid offsets at grain .... microgrids are respectively 5 m and 0.5 m so as to obtain several grid line ...

105

Modernizing the International Boundary and Water Commission  

E-Print Network (OSTI)

challenges are present in the Colorado River basin and inalong the Río Grande and Colorado rivers. While the 1944binational boundary along the Colorado and Río Grande. The

Kelly, Mary E.; Székely, Alberto

2004-01-01T23:59:59.000Z

106

The Influence of Grain Boundary Type upon Damage Evolution at Grain Boundary Interfaces  

Science Conference Proceedings (OSTI)

In a prior work, it was found that grain boundary structure strongly influences damage evolution at grain boundaries in copper samples subjected to either shock compression or incipient spall. Here, several grain boundaries with different grain boundary structures, including a {Sigma}3 (10-1) boundary, are interrogated via conventional transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) to investigate the effects of atomic-scale structural differences on grain boundary strength and mobility. Boundaries are studied both before and after shock compression at a peak shock stress of 10 GPa. Results of the TEM and HRTEM work are used in conjunction with MD modeling to propose a model for shock-induced damage evolution at grain boundary interfaces that is dependent upon coincidence.

Perez-Bergquist, Alejandro G [Los Alamos National Laboratory; Brandl, Christian [Los Alamos National Laboratory; Escobedo, Juan P [Los Alamos National Laboratory; Trujillo, Carl P [Los Alamos National Laboratory; Cerreta, Ellen K [Los Alamos National Laboratory; Gray III, George T [Los Alamos National Laboratory; Germann, Timothy C [Los Alamos National Laboratory

2012-07-09T23:59:59.000Z

107

Environmental boundaries to energy development  

SciTech Connect

Public concern about the environment, health and safety consequences of energy technology has been growing steadily for more than two decades in the United States. This concern forms an important boundary condition as the United States seeks to develop a new National Energy Strategy. Furthermore, the international aspects of the energy/environment interface such as acid rain global climate change and stratospheric ozone depletion are very prominent in US thinking. In fact, the energy systems of the world are becoming more closely coupled environmentally and otherwise. Now where is this coupling more important than that between the industrialized and developing world; the choices made by each will have profound effects on the other. The development of energy technologies compatible with both economic growth and improving and sustaining environmental quality represents a major R D challenge to the US and USSR. Decision about adoption of new technology and R D priorities can be improved by better measurements of how energy sources and uses are changing throughout the world and better methods to project the potential consequences of these decisions. Such projection require understanding relative risks of alternating existing and evolving technologies. All of these R D areas, technology improvement energy system monitoring and projection and comparative risk assessment are the topics of this seminar. Progress in each may be enhanced by collaboration and cooperation between our two countries. 7 refs., 27 figs., 5 tabs.

Trivelpiece, A.W.

1989-01-01T23:59:59.000Z

108

Radiating Instability of a Meridional Boundary Current  

Science Conference Proceedings (OSTI)

A linear stability analysis of a meridional boundary current on the beta plane is presented. The boundary current is idealized as a constant-speed meridional jet adjacent to a semi-infinite motionless far field. The far-field region can be ...

Hristina G. Hristova; Joseph Pedlosky; Michael A. Spall

2008-10-01T23:59:59.000Z

109

Imperfect Bose Gas with Attractive Boundary Conditions  

E-Print Network (OSTI)

The free Bose gas with attractive boundary conditions is an interesting toy model for the study of Bose-Einstein Condensation (BEC), because one has BEC already in one dimension. Here we study for the first time the imperfect Bose gas with these boundary conditions and prove rigorously the occurence of condensation.

Lieselot Vandevenne; Andre Verbeure

2005-03-29T23:59:59.000Z

110

Simultaneous Boundary Partitioning and Cameras Synchronization for  

E-Print Network (OSTI)

the boundary B and the periodicity T. A static variation (WDTs) of the WDT criterion in equa- tion (3) is defined in Alberton et al. (2012). In particular, WDTs(X) := max p0,t0 {t - t0 : p0 X(t), t t0}, (5 is an (open) boundary, a (periodic) cameras trajectory with minimum WDTs can be computed by optimally

Bullo, Francesco

111

Property:Building/Boundaries | Open Energy Information  

Open Energy Info (EERE)

Boundaries Boundaries Jump to: navigation, search This is a property of type String. Boundaries Pages using the property "Building/Boundaries" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + Several buildings + Sweden Building 05K0002 + Part of a building + Sweden Building 05K0003 + One building + Sweden Building 05K0004 + One building + Sweden Building 05K0005 + One building + Sweden Building 05K0006 + Several buildings + Sweden Building 05K0007 + One building + Sweden Building 05K0008 + One building + Sweden Building 05K0009 + One building + Sweden Building 05K0010 + One building + Sweden Building 05K0011 + One building + Sweden Building 05K0012 + One building + Sweden Building 05K0013 + One building + Sweden Building 05K0014 + One building +

112

Atomistic Simulation of Slow Grain Boundary Motion  

E-Print Network (OSTI)

Existing atomistic simulation techniques to study grain boundary motion are usually limited to either high velocities or temperatures and are difficult to compare to realistic experimental conditions. Here we introduce an ...

Deng, Chuang

113

Grain Boundary Energy Function for FCC Metals  

Science Conference Proceedings (OSTI)

Conference Tools for 2012 TMS Annual Meeting & Exhibition ... material-specific parameters that can be fit to energies measured or computed for just a handful of special boundaries. ... Cluster Expansion Methods - Progress and Outlook.

114

Boundary conditions for metric fluctuations in Lifshitz  

E-Print Network (OSTI)

We consider the quantisation of linearised fluctuations of the metric and matter fields about a Lifshitz background, exploring the possibility of alternative boundary conditions, allowing the slow fall-off modes to fluctuate. We find that for $z >2$, slow fall-off modes for some of the linearised fluctuations are normalizable, which opens up the possibility of considering alternative boundary conditions. Analysing stability, we find that alternative boundary conditions for the momentum density are allowed, but alternative boundary conditions for the energy density lead to an instability of the type we recently discovered in a similar analysis for scalar fields on a fixed Lifshitz background. Our investigation is in the context of the simple massive vector model, but we would expect the conclusions to be more general.

Andrade, Tomas

2013-01-01T23:59:59.000Z

115

Radiation Boundary Conditions in Numerical Modeling  

Science Conference Proceedings (OSTI)

A two-dimensional anelastic model is used to study the propagation of errors arising from the use of open lateral boundaries. Reference experiments were performed using very large horizontal domains. Other experiments were carried out in smaller ...

Mark Hedley; M. K. Yau

1988-09-01T23:59:59.000Z

116

Slope Control in Western Boundary Currents  

Science Conference Proceedings (OSTI)

An analytic solution is presented for the steady-state depth-averaged western boundary current flowing over the continental slope by combining three highly idealized models: the Stommel model, the Munk model, and the arrested topographic wave ...

Sang-Ki Lee; J. L. Pelegrí; John Kroll

2001-11-01T23:59:59.000Z

117

Subsidence in the Nocturnal Boundary Layer  

Science Conference Proceedings (OSTI)

Nights with clear skies and strong radiative cooling that favor the formation of statically stable nocturnal boundary layers (NBL) are also those nights most likely to have subsidence, because of the presence of synoptic high-pressure regions. ...

Merrilee A. Carlson; Roland B. Stull

1986-08-01T23:59:59.000Z

118

Propagation of Tracer Signals in Boundary Currents  

Science Conference Proceedings (OSTI)

The propagation of a range of tracer signals in a simple model of the deep western boundary current is examined. Analytical expressions are derived in certain limits for the transit-time distributions and the propagation times (tracer ages) of ...

Darryn W. Waugh; Timothy M. Hall

2005-09-01T23:59:59.000Z

119

Nonlinear boundary value problem of magnetic insulation  

E-Print Network (OSTI)

On the basis of generalization of upper and lower solution method to the singular two point boundary value problems, the existence theorem of solutions for the system, which models a process of magnetic insulation in plasma is proved.

A. V. Sinitsyn

2000-09-09T23:59:59.000Z

120

ARM - Measurement - Planetary boundary layer height  

NLE Websites -- All DOE Office Websites (Extended Search)

govMeasurementsPlanetary boundary layer height govMeasurementsPlanetary boundary layer height ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Planetary boundary layer height Top of the planetary boundary layer; also known as depth or height of the mixing layer. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments VCEIL : Vaisala Ceilometer External Instruments NCEPGFS : National Centers for Environment Prediction Global Forecast System Field Campaign Instruments

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
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121

Evaluating Formulations of Stable Boundary Layer Height  

Science Conference Proceedings (OSTI)

Stable boundary layer height h is determined from eddy correlation measurements of the vertical profiles of the buoyancy flux and turbulence energy from a tower over grassland in autumn, a tower over rangeland with variable snow cover during ...

D. Vickers; L. Mahrt

2004-11-01T23:59:59.000Z

122

Causal Viscosity in Accretion Disc Boundary Layers  

E-Print Network (OSTI)

The structure of the boundary layer region between the disc and a comparatively slowly rotating star is studied using a causal prescription for viscosity. The vertically integrated viscous stress relaxes towards its equilibrium value on a relaxation timescale $\\tau$, which naturally yields a finite speed of propagation for viscous information. For a standard alpha prescription with alpha in the range 0.1-0.01, and ratio of viscous speed to sound speed in the range 0.02-0.5, details in the boundary layer are strongly affected by the causality constraint. We study both steady state polytropic models and time dependent models, taking into account energy dissipation and transport. Steady state solutions are always subviscous with a variety of $\\Omega$ profiles which may exhibit near discontinuities. For alpha =0.01 and small viscous speeds, the boundary layer adjusted to a near steady state. A long wavelength oscillation generated by viscous overstability could be seen at times near the outer boundary. Being confined there, the boundary layer remained almost stationary. However, for alpha =0.1 and large viscous speeds, short wavelength disturbances were seen throughout which could significantly affect the power output in the boundary layer. This could be potentially important in producing time dependent behaviour in accreting systems such as CVs and protostars.

W. Kley; J. C. B. Papaloizou

1997-01-14T23:59:59.000Z

123

Crystallographic Boundary in a Magnetic Shape Memory Material  

NLE Websites -- All DOE Office Websites (Extended Search)

Home Science Highlights Science Briefs Crystallographic Boundary in a Magnetic Shape Memory Material Crystallographic Boundary in a Magnetic Shape Memory Material Print...

124

Tendency of Cooperative Grain Boundary Sliding in Nanocrystalline ...  

Science Conference Proceedings (OSTI)

Presentation Title, Tendency of Cooperative Grain Boundary Sliding in ... The objective of this research is to identify the tendency of cooperative grain boundary ...

125

Tangential residual as error estimator in the boundary element method  

Science Conference Proceedings (OSTI)

In this paper a new error estimator based on tangential derivative Boundary Integral Equation residuals for 2D Laplace and Helmholtz equations is shown. The direct problem for general mixed boundary conditions is solved using standard and hypersingular ... Keywords: Adaptivity, Boundary Integral Equation residual, Boundary element method, Error estimation, Mesh adaptation, Mesh refinement, Nodal sensitivity

Alejandro E. Martínez-Castro; Rafael Gallego

2005-04-01T23:59:59.000Z

126

An accurate moving boundary formulation in cut-cell methods  

Science Conference Proceedings (OSTI)

A cut-cell method for Cartesian meshes to simulate viscous compressible flows with moving boundaries is presented. We focus on eliminating unphysical oscillations occurring in Cartesian grid methods extended to moving-boundary problems. In these methods, ... Keywords: Compressible Navier-Stokes, Cut-cell method, Immersed boundary method, Moving boundary, Oscillating cylinder, Spurious force oscillations

Lennart Schneiders; Daniel Hartmann; Matthias Meinke; Wolfgang SchröDer

2013-02-01T23:59:59.000Z

127

ARM - Field Campaign - Boundary Layer Cloud IOP  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsBoundary Layer Cloud IOP govCampaignsBoundary Layer Cloud IOP Campaign Links Campaign Images Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer Cloud IOP 2005.07.11 - 2005.08.07 Lead Scientist : William Shaw For data sets, see below. Description Investigators from Pacific Northwest National Laboratory, in collaboration with scientists from a number of other institutions, carried out a month of intensive measurements at the ARM Climate Research Facility on the North Slope of Alaska in the summer of 2005. The purpose of these measurements was to determine how much the arctic land surface modifies the way low clouds reflect, absorb, and transmit solar and infrared radiation. This is an important problem because arctic clouds play a prominent role in

128

Boundary representations and pure completely positive maps  

E-Print Network (OSTI)

In 2006, Arveson resolved a long-standing problem by showing that for any element $x$ of a separable self-adjoint unital subspace $S\\subseteq B(H)$, $\\|x\\|=\\sup\\|\\pi(x)\\|$, where $\\pi$ runs over the boundary representations for $S$. Here we show that "sup" can be replaced by "max". This implies that the Choquet boundary for a separable operator system is a boundary in the classical sense; a similar result is obtained in terms of pure matrix states when $S$ is not assumed to be separable. For matrix convex sets associated to operator systems in matrix algebras, we apply the above results to improve the Webster-Winkler Krein-Milman theorem.

Kleski, Craig

2011-01-01T23:59:59.000Z

129

Wireless boundary monitor system and method  

DOE Patents (OSTI)

A wireless boundary monitor system used to monitor the integrity of a boundary surrounding an area uses at least two housings having at least one transmitting means for emitting ultrasonic pressure waves to a medium. Each of the housings has a plurality of receiving means for sensing the pressure waves in the medium. The transmitting means and the receiving means of each housing are aimable and communicably linked. At least one of the housings is equipped with a local alarm means for emitting a first alarm indication whereby, when the pressure waves propagating from a transmitting means to a receiving means are sufficiently blocked by an object a local alarm means or a remote alarm means or a combination thereof emit respective alarm indications. The system may be reset either manually or automatically. This wireless boundary monitor system has useful applications in both indoor and outdoor environments.

Haynes, Howard D. (Knoxville, TN); Ayers, Curtis W. (Kingston, TN)

1997-01-01T23:59:59.000Z

130

Wireless boundary monitor system and method  

DOE Patents (OSTI)

A wireless boundary monitor system used to monitor the integrity of a boundary surrounding an area uses at least two housings having at least one transmitting means for emitting ultrasonic pressure waves to a medium. Each of the housings has a plurality of receiving means for sensing the pressure waves in the medium. The transmitting means and the receiving means of each housing are aimable and communicably linked. At least one of the housings is equipped with a local alarm means for emitting a first alarm indication whereby, when the pressure waves propagating from a transmitting means to a receiving means are sufficiently blocked by an object a local alarm means or a remote alarm means or a combination thereof emit respective alarm indications. The system may be reset either manually or automatically. This wireless boundary monitor system has useful applications in both indoor and outdoor environments. 4 figs.

Haynes, H.D.; Ayers, C.W.

1997-12-09T23:59:59.000Z

131

ARM - Publications: Science Team Meeting Documents: The SGP Aerosol...  

NLE Websites -- All DOE Office Websites (Extended Search)

banner Cart Icon Cart | Home | People | Site Index Atmospheric Radiation Measurement Climate Research Facility US Department of Energy About Science Campaigns Sites Instruments...

132

Surface Albedo at ARM SGP from Helicopter Observations  

NLE Websites -- All DOE Office Websites (Extended Search)

model (Fu and Liou 1993), ARM profile information and aerosols, and albedo spectral shape from the CARE experiment. Surface albedo is then adjusted such that model fluxes...

133

Investigation of SGP Atmospheric Moisture Budget for CLASIC ?...  

NLE Websites -- All DOE Office Websites (Extended Search)

of a recently completed investigation of the moisture budget over the Midwestern Corn Belt (Zangvil et al. 2001, 2004) This study will be expanded with * Extended seasons...

134

sgp_stratus_poster_v1.0.ppt  

NLE Websites -- All DOE Office Websites (Extended Search)

overlaid on the LES profiles. *This stratus case was not accompanied by consistent subsidence and slowly varying advective forcings typical of a marine barotropic atmosphere....

135

An Improved Cloud Classification Algorithm Based on the SGP CART...  

NLE Websites -- All DOE Office Websites (Extended Search)

studies which need to group clouds according to cloud types, but also provides necessary information to implement different retrieval algorithms to generate integrated cloud...

136

Nonlinear Regimes of Baroclinic Boundary Currents  

Science Conference Proceedings (OSTI)

A process study is conducted on the evolution of boundary currents in a two-layer quasigeostrophic model on the f plane. These currents are composed of two strips of uniform potential vorticity (PV), one in each layer, and both hugging the coast. ...

Xavier J. Capet; Xavier J. Carton

2004-06-01T23:59:59.000Z

137

Boundary stability under nonequilibrium conditions. Final report  

Science Conference Proceedings (OSTI)

Summaries of research accomplished are given for the following areas: Morphological (Diffusional) Stability; A New Algorithm for Numerical Modeling of Non-equilibrium Materials Behavior; A Unified Treatment of Single and Microcrystalline Film Edge Instabilities; and Validation of the Structure Based Grain Boundary Diffusion/Migration Model.

Hackney, S.A.; Lee, J.K.; Plichta, M.R.

1999-08-01T23:59:59.000Z

138

The Western Boundary Undercurrent off the Bahamas  

Science Conference Proceedings (OSTI)

Two tritium sections through the deep western boundary current east of the Bahamas taken in late 1980 and early 1981 are presented. Tritium from the bomb tests in the late 1950s and early 1960s is used to identify recently formed deep waters in ...

Donald B. Olson; Gote H. Ostlund; Jorge Sarmiento

1986-02-01T23:59:59.000Z

139

Building boundaries and negotiating work at home  

Science Conference Proceedings (OSTI)

Millions of people are now working full-or part-time at home. Computer technology allows workers remote access to materials and facilitates communication with coworkers and supervisors. Companies are developing telecommuting programs to benefit both ... Keywords: boundaries, groups, home, telecommuting, telework, virtual environments, work

Christine Salazar

2001-09-01T23:59:59.000Z

140

TCRD Boundary 1) Pacific Northwest National Laboratory  

E-Print Network (OSTI)

TCRD Boundary 1) Pacific Northwest National Laboratory 2) Fluor Hanford 3) Thompson Mechanical-Tech, Inc. 28) YAHSGS 29) Washington Closure Hanford 30) KinderCare 31) A.M. Express 32) Energy Solutions 33 (Cougar Café) 74) Corporate Wellness Center 75) University Park Condominiums 76) CH2M Hill Hanford Group

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Parabolic systems with coupled boundary conditions  

E-Print Network (OSTI)

We consider elliptic operators with operator-valued coefficients and discuss the associated parabolic problems. The unknowns are functions with values in a Hilbert space $W$. The system is equipped with a general class of coupled boundary conditions of the form $f_{|\\partial\\Omega}\\in \\mathcal Y$ and $\\frac{\\partial f}{\\partial \

Stefano Cardanobile; Delio Mugnolo

2008-12-19T23:59:59.000Z

142

Boundary-Layer Damping of Baroclinic Instability  

Science Conference Proceedings (OSTI)

A shooting method is applied to a 100-level perturbation model with an explicit Ekman layer. Growth rates for a no-slip boundary condition are similar to those found previously. It is noted that the large cross-isobaric flow of the classic Ekman ...

D. O. Staley

1993-03-01T23:59:59.000Z

143

Spectral Scaling in a Tidal Boundary Layer  

Science Conference Proceedings (OSTI)

The simple scaling of a tidal bottom boundary layer by the shear velocity, u*, and the wall to the wall describes well the mean Bow field. To test the full extent of this scaling measurements were made of the turbulence spectra in a natural tidal ...

Thomas F. Gross; Arthur R. M. Nowell

1985-05-01T23:59:59.000Z

144

Spectral Domain Boundaries in Cellular Automata  

Science Conference Proceedings (OSTI)

Let A^{Z^D} be the Cantor space of Z^D-indexed configurations in a finite alphabet A, and let ? be the Z^D-action of shifts on A^{Z^D}. A cellular automaton is a continuous, ?-commuting self-map ? of A^{Z^D}, and a ?-invariant ... Keywords: Cellular automaton, defect, domain boundary, kink, subshift

Marcus Pivato

2007-11-01T23:59:59.000Z

145

Crystallographic Characteristics of Grain Boundaries in Dense Yttria-Stabilized Zirconia  

DOE Green Energy (OSTI)

and that the boundary plane distribution is inversely correlated to the boundary energy distribution.

Lam Helmick; Shen J. Dillon; Kirk Gerdes; Randall Gemmen; Gregory S. Rohrer; Sridhar Seetharaman; Paul A. Salvador

2010-04-01T23:59:59.000Z

146

Hierarchical Bayesian Approach to Boundary Value Problems with Stochastic Boundary Conditions  

Science Conference Proceedings (OSTI)

Boundary value problems are ubiquitous in the atmospheric and ocean sciences. Typical settings include bounded, partially bounded, global, and limited area domains, discretized for applications of numerical models of the relevant fluid equations. ...

Christopher K. Wikle; L. Mark Berliner; Ralph F. Milliff

2003-06-01T23:59:59.000Z

147

Microsoft Word - Gage-KS.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

Intercomparisons of Cloud Observations Intercomparisons of Cloud Observations from the AL S-band Profiler and the ETL K-band Millimeter-Wave Cloud Radar on the R/V Ronald H. Brown during Nauru99 K. S. Gage and D. A. Carter National Oceanic and Atmospheric Administration Aeronomy Laboratory Boulder, Colorado P. E. Johnston and C. R. Williams Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder, Colorado M. Ryan Science Technology Corporation Boulder, Colorado D. Hazen and B. W. Orr National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado Introduction Nauru99 took place in the western and central Pacific during June and July 1999. During Nauru99, a diverse suite of instruments was located on the research vessel (R/V) Ronald H. Brown to measure cloud

148

Abrupt grain boundary melting in ice  

E-Print Network (OSTI)

The effect of impurities on the grain boundary melting of ice is investigated through an extension of Derjaguin-Landau-Verwey-Overbeek theory, in which we include retarded potential effects in a calculation of the full frequency dependent van der Waals and Coulombic interactions within a grain boundary. At high dopant concentrations the classical solutal effect dominates the melting behavior. However, depending on the amount of impurity and the surface charge density, as temperature decreases, the attractive tail of the dispersion force interaction begins to compete effectively with the repulsive screened Coulomb interaction. This leads to a film-thickness/temperature curve that changes depending on the relative strengths of these interactions and exhibits a decrease in the film thickness with increasing impurity level. More striking is the fact that at very large film thicknesses, the repulsive Coulomb interaction can be effectively screened leading to an abrupt reduction to zero film thickness.

L. Benatov; J. S. Wettlaufer

2004-12-30T23:59:59.000Z

149

Boundary Plasma Turbulence Simulations for Tokamaks  

SciTech Connect

The boundary plasma turbulence code BOUT models tokamak boundary-plasma turbulence in a realistic divertor geometry using modified Braginskii equations for plasma vorticity, density (ni), electron and ion temperature (T{sub e}; T{sub i}) and parallel momenta. The BOUT code solves for the plasma fluid equations in a three dimensional (3D) toroidal segment (or a toroidal wedge), including the region somewhat inside the separatrix and extending into the scrape-off layer; the private flux region is also included. In this paper, a description is given of the sophisticated physical models, innovative numerical algorithms, and modern software design used to simulate edge-plasmas in magnetic fusion energy devices. The BOUT code's unique capabilities and functionality are exemplified via simulations of the impact of plasma density on tokamak edge turbulence and blob dynamics.

Xu, X; Umansky, M; Dudson, B; Snyder, P

2008-05-15T23:59:59.000Z

150

Nuclear Power Plant Containment Pressure Boundary Research  

SciTech Connect

Research to address aging of the containment pressure boundary in light-water reactor plants is summarized. This research is aimed at understanding the significant factors relating occurrence of corrosion, efficacy of inspection, and structural capacity reduction of steel containment and liners of concrete containment. This understanding will lead to improvements in risk-informed regulatory decision making. Containment pressure boundary components are described and potential aging factors identified. Quantitative tools for condition assessments of aging structures to maintain an acceptable level of reliability over the service life of the plant are discussed. Finally, the impact of aging (i.e., loss of shell thickness due to corrosion) on steel containment fragility for a pressurized water reactor ice-condenser plant is presented.

Cherry, J.L.; Chokshi, N.C.; Costello, J.F.; Ellingwood, B.R.; Naus, D.J.

1999-09-15T23:59:59.000Z

151

Ks-BAND DETECTION OF THERMAL EMISSION AND COLOR CONSTRAINTS TO CoRoT-1b: A LOW-ALBEDO PLANET WITH INEFFICIENT ATMOSPHERIC ENERGY REDISTRIBUTION AND A TEMPERATURE INVERSION  

SciTech Connect

We report the detection in Ks-band of the secondary eclipse of the hot Jupiter CoRoT-1b from time series photometry with the ARC 3.5 m telescope at Apache Point Observatory. The eclipse shows a depth of 0.336 +- 0.042% and is centered at phase 0.5022{sup +0.0023}{sub -0.0027}, consistent with a zero eccentricity orbit (e cos omega = 0.0035{sup +0.0036}{sub -0.0042}). We perform the first optical to near-infrared multi-band photometric analysis of an exoplanet's atmosphere and constrain the reflected and thermal emissions by combining our result with the recent 0.6, 0.71, and 2.09 mum secondary eclipse detections by Snellen et al., Gillon et al., and Alonso et al. Comparing the multi-wavelength detections to state-of-the-art radiative-convective chemical-equilibrium atmosphere models, we find the near-infrared fluxes difficult to reproduce. The closest blackbody-based and physical models provide the following atmosphere parameters: a temperature T = 2460{sup +80}{sub -160} K; a very low Bond albedo A{sub B} = 0.000{sup +0.081}{sub -0.000}; and an energy redistribution parameter P{sub n} = 0.1, indicating a small but nonzero amount of heat transfer from the day to nightside. The best physical model suggests a thermal inversion layer with an extra optical absorber of opacity kappa{sub e} = 0.05 cm{sup 2} g{sup -1}, placed near the 0.1 bar atmospheric pressure level. This inversion layer is located 10 times deeper in the atmosphere than the absorbers used in models to fit mid-infrared Spitzer detections of other irradiated hot Jupiters.

Rogers, Justin C. [Department of Physics and Astronomy, Johns Hopkins University, 366 Bloomberg Center, 3400 N. Charles Street, Baltimore, MD 21218 (United States); Apai, Daniel [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Lopez-Morales, Mercedes [Department of Terrestrial Magnetism, Carnegie Institution of Washngton, 5241 Broad Branch Rd. NW, Washington, DC 20015 (United States); Sing, David K. [UPMC Univ Paris 06, CNRS, Institut d'Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris (France); Burrows, Adam, E-mail: rogers@pha.jhu.ed [Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544 (United States)

2009-12-20T23:59:59.000Z

152

Surface and Grain Boundary Segregation in Oxides: Implications for ...  

Science Conference Proceedings (OSTI)

Abstract Scope, A comprehensive understanding of the segregation behavior ... We examine segregation to a series of grain boundaries as well as to free surfaces, ... Atomic-scale Observations of Grain Boundary Structure in Bismuth Telluride.

153

The Boundary Layer of Tropical Cyclone Kerry (1979)  

Science Conference Proceedings (OSTI)

The boundary layer structure of Tropical Cyclone Kerry (1979) is investigated using composite analysis of research aircraft, surface ship, and automatic weather station observations. The boundary layer was moist, convective, and strongly ...

Peter G. Black; Greg J. Holland

1995-07-01T23:59:59.000Z

154

Choosing a Boundary Layer Parameterization for Tropical Cyclone Modeling  

Science Conference Proceedings (OSTI)

The boundary layer in a tropical cyclone is in some respects unlike that elsewhere in the atmosphere. It is therefore necessary to evaluate boundary layer parameterizations for their suitability for use in tropical cyclone simulation. Previous ...

Jeffrey D. Kepert

2012-05-01T23:59:59.000Z

155

A Step toward Transparent Boundary Conditions for Meteorological Models  

Science Conference Proceedings (OSTI)

Transparent boundary conditions for the linearized shallow water equations are constructed by incorporating the boundary conditions into equations that describe unidirectional waves. The shallow water equations are then discretized using a semi-...

A. McDonald

2002-01-01T23:59:59.000Z

156

An Open Boundary Condition for Numerical Coastal Circulation Models  

Science Conference Proceedings (OSTI)

Open boundaries (OBs) are usually unavoidable in numerical coastal circulation simulations. At OBs, an appropriate open boundary condition (OBC) is required so that outgoing waves freely pass to the exterior without creating reflections back into ...

Peifeng Ma; Ole Secher Madsen

2011-12-01T23:59:59.000Z

157

Alternative Nonlocal Descriptions of Boundary-Layer Evolution  

Science Conference Proceedings (OSTI)

Two alternative parameterizations for nonlocal turbulence mixing are tested in a 1D boundary-layer model against a dataset from the 1983 Boundary-Layer Experiment (BLX83) in Oklahoma. One method, proposed previously by Stull and Driedonks, is ...

Qing Zhang; Roland Stull

1992-12-01T23:59:59.000Z

158

Evaluation of Boundary Layer Depth Estimates at Summit Station, Greenland  

Science Conference Proceedings (OSTI)

Boundary layer conditions in polar regions have been shown to have a significant impact on the levels of trace gases in the lower atmosphere. The ability to properly describe boundary layer characteristics (e.g., stability, depth, and variations ...

B. Van Dam; D. Helmig; W. Neff; L. Kramer

2013-10-01T23:59:59.000Z

159

Space-efficient boundary representation of volumetric objects  

Science Conference Proceedings (OSTI)

In this paper we present a compression technique for efficiently representing boundary objects from volumetric data-sets. Exploiting spatial coherency within object contours, we are able to reduce the size of the volumetric boundary down to the size ...

Lukas Mroz; Helwig Hauser

2001-05-01T23:59:59.000Z

160

Behavior of Turbulence Statistics in the Convective Boundary Layer  

Science Conference Proceedings (OSTI)

Velocity variances in the convective boundary layer are examined using data derived in PBL experiments over land (Minnesota) and ocean (the Coral Sea) supported by data from the Kansas study of the surface boundary layer. In the freely convective ...

B. B. Hicks

1985-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Single-Point Closures in a Neutrally Stratified Boundary Layer  

Science Conference Proceedings (OSTI)

Closure assumptions often employed in single-point closure models for boundary-layer applications are evaluated against a neutrally stratified planetary boundary-layer flow generated by large-eddy simulation. The contributions from slow and rapid ...

Anders Andrén; Chin-Hoh Moeng

1993-10-01T23:59:59.000Z

162

Toward More Accurate Wave-Permeable Boundary Conditions  

Science Conference Proceedings (OSTI)

This paper investigates several fundamental aspects of wave-permeable, or “radiation,” lateral boundary conditions. Orlanski (1976) proposed that approximate wave-permeable boundary conditions could be constructed by advecting disturbances out of ...

Dale R. Durran; Ming-Jen Yang; Donald N. Slinn; Randy G. Brown

1993-02-01T23:59:59.000Z

163

Boundary Conditions for Limited-Area Ensemble Kalman Filters  

Science Conference Proceedings (OSTI)

One aspect of implementing a limited-area ensemble Kalman filter (EnKF) involves the specification of a suitable ensemble of lateral boundary conditions. Two classes of methods to populate a boundary condition ensemble are proposed. In the first ...

Ryan D. Torn; Gregory J. Hakim; Chris Snyder

2006-09-01T23:59:59.000Z

164

Autumnal Mixed-Phase Cloudy Boundary Layers in the Arctic  

Science Conference Proceedings (OSTI)

Two mixed-phase cloudy boundary layer events observed over the Arctic ice pack in autumn are extensively analyzed. The local dynamic and thermodynamic structure of the boundary layers is determined from aircraft measurements including analysis of ...

James O. Pinto

1998-06-01T23:59:59.000Z

165

The Role of Boundary Layer Processes in Limiting PV Homogenization  

Science Conference Proceedings (OSTI)

A ?-plane multilevel quasigeostrophic channel model with interactive static stability and a simplified parameterization of atmospheric boundary layer physics is used to study the role of different boundary layer processes in eddy equilibration ...

Yang Zhang; Peter H. Stone; Amy Solomon

2009-06-01T23:59:59.000Z

166

A Cloudiness Transition in a Marine Boundary Layer  

Science Conference Proceedings (OSTI)

In situ aircraft data and lidar data are used to analyze a transition in the boundary layer thermodynamic structure from a clear boundary layer through small cumulus and broken stratocumulus to a deck of solid stratocumulus. The data was ...

Alan K. Betts; Reinout Boers

1990-06-01T23:59:59.000Z

167

BLIPS: A System for Studying Benthic Boundary Layer Dynamics  

Science Conference Proceedings (OSTI)

A Boundary Layer Interaction Profiting System (BLIPS) has been developed to measure kinematic quantities necessary for verification of theoretical, two-phase boundary layer flow models. BLIPS sensors include electromagnetic current meters, ...

Charles E. Adams Jr.; Winfield Hill; Rodney Fredericks

1990-10-01T23:59:59.000Z

168

Realization of the D'B' boundary condition  

E-Print Network (OSTI)

In this paper we find a realization for the D'B'-boundary conditions, which imposes vanishing normal derivatives of the normal components of the D and B fields. The implementation of the DB boundary, requiring vanishing normal components of D and B, is known. It is shown that the realization of the D'B' boundary can be based on a layer of suitable metamaterial, called the wave-guiding quarter-wave transformer, which transforms the DB boundary to the D'B' boundary. In an appendix, the mixed-impedance boundary, which is a generalization of both DB and D'B' boundaries, is shown to transform to another mixed-impedance boundary through the same transformer.

I. V. Lindell; A. Sihvola; L. bergamin; A. Favaro

2011-03-21T23:59:59.000Z

169

High Throughput Quantification of Grain Boundary Segregation by ...  

Science Conference Proceedings (OSTI)

... by Correlative Transmission Electron Microscopy and Atom Probe Tomography ... Line Tension of Grain Boundary Triple Junctions in the Copper Tricrystals.

170

Modelling and Grain Boundary Engineering for High Performance ...  

Science Conference Proceedings (OSTI)

... useful information for future development of polysilicon sollar cell with high performance photovoltaic and electric properties by grain boundary engineering,

171

Optimal Control of Free Boundary Problems with Surface ...  

Science Conference Proceedings (OSTI)

... Up, Optimal Control of Free Boundary Problems with Surface Tension Effects. Harbir Antil Department of Mathematical Sciences ...

2013-11-18T23:59:59.000Z

172

Beyond Boundary Objects: Collaborative Reuse in Aircraft Technical Support  

Science Conference Proceedings (OSTI)

Boundary objects are a critical, but understudied, theoretical construct in CSCW. Through a field study of aircraft technical support, we examined the role of boundary objects in the practical achievement of safety by service engineers. Their resolution ... Keywords: boundary objects, collaborative work, high reliability organizations, hotlines, information reuse, organizational memory, safety, service engineering, technical support

Wayne G. Lutters; Mark S. Ackerman

2007-06-01T23:59:59.000Z

173

Free boundary regularity for a problem with right hand side  

E-Print Network (OSTI)

We consider a one-phase free boundary problem with variable coefficients and non-zero right hand side. We prove that flat free boundaries are $C^{1,\\alpha}$ using a different approach than the classical supconvolution method of Caffarelli. We use this result to obtain that Lipschitz free boundaries are $C^{1,\\alpha}$.

De Silva, Daniela

2009-01-01T23:59:59.000Z

174

Pressure boundary conditions for computing incompressible flows with SPH  

Science Conference Proceedings (OSTI)

In Smoothed Particle Hydrodynamics (SPH) methods for fluid flow, incompressibility may be imposed by a projection method with an artificial homogeneous Neumann boundary condition for the pressure Poisson equation. This is often inconsistent with physical ... Keywords: Boundary conditions, Flow around obstacle, Incompressibility, Open-boundary flows, Pressure Poisson equation, Projection scheme, Smoothed Particle Hydrodynamics

S. Majid Hosseini; James J. Feng

2011-08-01T23:59:59.000Z

175

Twin boundary cavitation in aged type 304 stainless steel  

SciTech Connect

A transition from grain to twin boundary cavitation was observed in aged- and-creep-tested type 304 stainless steel. Evidence of twin boundary cavitation has also been observed for unaged material under certain test conditions. This same behavior was also found in aged type 316 stainless steel. Several possible reasons have been suggested for the absence of frequently observed grain boundary cavitation. (auth)

Sikka, V.K.; Swindeman, R.W.; Brinkman, C.R.

1975-10-01T23:59:59.000Z

176

A System Level Boundary Scan Controller Board for VME Applications  

Science Conference Proceedings (OSTI)

In this article an application of boundary scan test at system level is analyzed. The objective is met through the description of the design and implementation options of a VME boundary scan controller board prototype and the corresponding software. ... Keywords: ATPG, IEEE 1149.1 boundary scan test, board level test and system level test

Nuno Cardoso; Carlos Beltrán Almeida; José Carlos Da Silva

2001-06-01T23:59:59.000Z

177

Study of the Lateral Boundary Condition Temporal Resolution Problem and a Proposed Solution by Means of Boundary Error Restarts  

Science Conference Proceedings (OSTI)

To properly utilize coupled limited-area models (LAMs), the time scales of the cross-boundary fluxes in the available lateral boundary data must be assessed. In current operational practice, the update frequencies of these data are usually ...

Piet Termonia; Alex Deckmyn; Rafiq Hamdi

2009-10-01T23:59:59.000Z

178

Seasonal Simulations of the Planetary Boundary Layer and Boundary-Layer Stratocumulus Clouds with a General Circulation Model  

Science Conference Proceedings (OSTI)

The UCLA general circulation model (GCM) has been used to simulate the seasonally varying planetary boundary layer (PBL), as well as boundary-layer stratus and stratocumulus clouds. The PBL depth is a prognostic variable of the GCM, incorporated ...

David A. Randall; James A. Abeles; Thomas G. Corsetti

1985-04-01T23:59:59.000Z

179

Invariance properties of boundary sets of open embeddings of manifolds and their application to the abstract boundary  

E-Print Network (OSTI)

The {\\em abstract boundary\\/} (or {\\em {\\em a\\/}-boundary\\/}) of Scott and Szekeres \\cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional, paracompact, connected, Hausdorff, $C^\\infty$-manifold (without a boundary in the usual sense). In general relativity one deals with a {\\em space-% time\\/} $(\\cM,g)$ (a 4-dimensional manifold $\\cM$ with a Lorentzian metric $g$), together with a chosen preferred class of curves in $\\cM$. In this case the {\\em a\\/}-boundary points may represent ``singularities'' or ``points at infinity''. Since the {\\em a\\/}-boundary itself, however, does not depend on the existence of further structure on the manifold such as a Lorentzian metric or connection, it is possible for it to be used in many contexts. In this paper we develop some purely topological properties of abstract boundary sets and abstract boundary points ({\\em a\\/}-boundary points). We prove, amongst other things, that compactness is invariant under boundary set equivalence, and introduce another invariant concept ({\\em isolation\\/}), which encapsulates the notion that a boundary set is ``separated'' from other boundary points of the same embedding. ....... [The abstract continues in paper proper - truncated to fit here.

Christopher J. Fama; Susan M. Scott

1994-06-16T23:59:59.000Z

180

Anti-de Sitter boundary in Poincare coordinates  

E-Print Network (OSTI)

We study the space-time boundary of a Poincare patch of Anti-de Sitter (AdS) space. We map the Poincare AdS boundary to the global coordinate chart and show why this boundary is not equivalent to the global AdS boundary. The Poincare AdS boundary is shown to contain points of the bulk of the entire AdS space. The Euclidean AdS space is also discussed. In this case one can define a semi-global chart that divides the AdS space in the same way as the corresponding Euclidean Poincare chart.

Bayona, C A; Bayona, Carlos Alfonso; Braga, Nelson R. F.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Supergravity at the boundary of AdS supergravity  

Science Conference Proceedings (OSTI)

We give a general analysis of AdS boundary conditions for spin-3/2 Rarita-Schwinger fields and investigate boundary conditions preserving supersymmetry for a graviton multiplet in AdS{sub 4}. Linear Rarita-Schwinger fields in AdS{sub d} are shown to admit mixed Dirichlet-Neumann boundary conditions when their mass is in the range 0{dictionary, Neumann boundary conditions in d=4 supergravity correspond to gauging the superconformal group of the three-dimensional CFT describing M2-branes, while N=1 supersymmetric mixed boundary conditions couple the CFT to N=1 superconformal topologically massive gravity.

Amsel, Aaron J.; Compere, Geoffrey [Department of Physics, University of California, Santa Barbara, California 93106 (United States)

2009-04-15T23:59:59.000Z

182

The minisodar and planetary boundary layer studies  

SciTech Connect

The minisodar, in addition to being smaller than conventional sodar, operates at higher frequencies, obtains usable signal returns closer to the surface, and can use smaller range gates. Because the max range is generally limited to the lower 200 m above the surface, the minisodar is not able to interrogate the entire daytime atmospheric Planetary Boundary Layer (PBL); however it can be a very useful tool for understanding the PBL. In concert with other instruments, the minisodar can add significant new insights to our understanding of the PBL. This paper gives examples of past and potential uses of minisodars in such situations.

Coulter, R.L.

1996-06-01T23:59:59.000Z

183

GRAIN BOUNDARY STRENGTHENING PROPERTIES OF TUNGSTEN ALLOYS  

SciTech Connect

Density functional theory was employed to investigate grain boundary (GB) properties of W alloys. A range of substitutional solutes across the Periodic Table was investigated to understand the behavior of different electronic orbitals in changing the GB cleavage energy in the ?27a[110]{525} GB. A number of transition metals were predicted to enhance the GB cohesion. This includes Ru, Re, Os, Ir, V, Cr, Mn, Fe, Co, Ti, Hf, Ta and Nb. While lanthanides, s and p elements were tended to cause GB embrittlement.

Setyawan, Wahyu; Kurtz, Richard J.

2012-10-10T23:59:59.000Z

184

Plasma waves reflection from a boundary with specular accommodative boundary conditions  

E-Print Network (OSTI)

In the present work the linearized problem of plasma wave reflection from a boundary of a half--space is solved analytically. Specular accommodative conditions of plasma wave reflection from plasma boundary are taken into consideration. Wave reflectance is found as function of the given parameters of the problem, and its dependence on the normal electron momentum accommodation coefficient is shown by the authors. The case of resonance when the frequency of self-consistent electric field oscillations is close to the proper (Langmuir) plasma oscillations frequency, namely, the case of long wave limit is analyzed. Refs. 17. Figs. 6.

N. V. Gritsienko; A. V. Latyshev; A. A. Yushkanov

2010-01-06T23:59:59.000Z

185

Grain boundary characterization in an X750 alloy  

SciTech Connect

Grain boundary chemistry in an X750 Ni alloy was analyzed by atom probe tomography in an effort to clarify the possible roles of elemental segregation and carbide presence on the stress corrosion cracking behavior of Ni alloys. Two types of cracks are observed: straight cracks along twin boundaries and wavy cracks at general boundaries. It was found that carbides (M23C6 and TiC) are present at both twin and general boundaries, with comparable B and P segregation for all types of grain boundaries. Twin boundaries intercept ?’ precipitates while the general boundaries wave around the ?’ and carbide precipitates. Near a crack tip, oxidation takes place on the periphery of carbide precipitate.

Kevin Fisher; Sebastien Teysseyre; Emmanuelle Marquis

2012-11-01T23:59:59.000Z

186

AC/AB Stacking Boundaries in Bilayer Graphene  

Science Conference Proceedings (OSTI)

Boundaries, including phase boundaries, grain boundaries, and domain boundaries, are known to have an important influence on material properties. Here, dark-field (DF) transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) imaging are combined to provide a full view of boundaries between AB and AC stacking domains in bilayer graphene across length scales from discrete atoms to the macroscopic continuum. Combining the images with results obtained by density functional theory (DFT) and classical molecular dynamics calculations, we demonstrate that the AB/AC stacking boundaries in bilayer graphene are nanometer-wide strained channels, mostly in the form of ripples, producing smooth low-energy transitions between the two different stackings. Our results provide a new understanding of the novel stacking boundaries in bilayer graphene, which may be applied to other layered two-dimensional materials as well.

Lin, Junhao [ORNL; Fang, Wenjing [Massachusetts Institute of Technology (MIT); Zhou, Wu [ORNL; Lupini, Andrew R [ORNL; Idrobo Tapia, Juan C [ORNL; Kong, Jing [Massachusetts Institute of Technology (MIT); Pennycook, Stephen J [ORNL; Pantelides, Sokrates T [ORNL

2013-01-01T23:59:59.000Z

187

Thermal field theories and shifted boundary conditions  

E-Print Network (OSTI)

The analytic continuation to an imaginary velocity of the canonical partition function of a thermal system expressed in a moving frame has a natural implementation in the Euclidean path-integral formulation in terms of shifted boundary conditions. The Poincare' invariance underlying a relativistic theory implies a dependence of the free-energy on the compact length L_0 and the shift xi only through the combination beta=L_0(1+xi^2)^(1/2). This in turn implies that the energy and the momentum distributions of the thermal theory are related, a fact which is encoded in a set of Ward identities among the correlators of the energy-momentum tensor. The latter have interesting applications in lattice field theory: they offer novel ways to compute thermodynamic potentials, and a set of identities to renormalize non-perturbatively the energy-momentum tensor. At fixed bare parameters the shifted boundary conditions also provide a simple method to vary the temperature in much smaller steps than with the standard procedure.

Leonardo Giusti; Harvey B. Meyer

2013-10-29T23:59:59.000Z

188

Dynamic Boundaries of Event Horizon Magnetospheres  

E-Print Network (OSTI)

This Letter analyzes 3-dimensional simulations of Kerr black hole magnetospheres that obey the general relativistic equations of perfect magnetohydrodynamics (MHD). Particular emphasis is on the event horizon magnetosphere (EHM) which is defined as the the large scale poloidal magnetic flux that threads the event horizon of a black hole (This is distinct from the poloidal magnetic flux that threads the equatorial plane of the ergosphere, which forms the ergospheric disk magnetosphere). Standard MHD theoretical treatments of Poynting jets in the EHM are predicated on the assumption that the plasma comprising the boundaries of the EHM plays no role in producing the Poynting flux. The energy flux is electrodynamic in origin and it is essentially conserved from the horizon to infinity, this is known as the Blandford-Znajek (B-Z) mechanism. To the contrary, within the 3-D simulations, the lateral boundaries are strong pistons for MHD waves and actually inject prodigious quantities of Poynting flux into the EHM. At high black hole spin rates, strong sources of Poynting flux adjacent to the EHM from the ergospheric disk will actually diffuse to higher latitudes and swamp any putative B-Z effects. This is in contrast to lower spin rates, which are characterized by much lower output powers and modest amounts of Poynting flux are injected into the EHM from the accretion disk corona.

Brian Punsly

2007-07-20T23:59:59.000Z

189

Thermal field theories and shifted boundary conditions  

E-Print Network (OSTI)

The analytic continuation to an imaginary velocity of the canonical partition function of a thermal system expressed in a moving frame has a natural implementation in the Euclidean path-integral formulation in terms of shifted boundary conditions. The Poincare' invariance underlying a relativistic theory implies a dependence of the free-energy on the compact length L_0 and the shift xi only through the combination beta=L_0(1+xi^2)^(1/2). This in turn implies that the energy and the momentum distributions of the thermal theory are related, a fact which is encoded in a set of Ward identities among the correlators of the energy-momentum tensor. The latter have interesting applications in lattice field theory: they offer novel ways to compute thermodynamic potentials, and a set of identities to renormalize non-perturbatively the energy-momentum tensor. At fixed bare parameters the shifted boundary conditions also provide a simple method to vary the temperature in much smaller steps than with the standard procedur...

Giusti, Leonardo

2013-01-01T23:59:59.000Z

190

Soot profiles in boundary-layer flames  

DOE Green Energy (OSTI)

Carbon particulate volume fractions and approximate particle size distributions are measured in a free laminar combusting boundary layer for liquid hydrocarbon fuels (n-heptane, iso-octane, cyclohexane, cyclohexene, toluene) and polymethylmethacrylate (PMMA). A multiwavelength laser transmission technique determines a most probable radius and the total particle concentration, which are two parameters in an assumed form for the size distribution. In the combusting boundary layer, a sooting region exists between the pyrolyzing fuel surface and the flame zone. The liquid fuel soot volume fractions, f/sub v/, range from f/sub v/ approx. 10/sup -7/ for n-heptane, a paraffin, to f/sub v approx. 10/sup -5/ for toluene, an aromatic. The PMMA volume fractions, f/sub v/ approx. 5 X 10/sup -7/, are approximately the same as the values previously reported for pool fires. The soot volume fractions increase with height; convection of carbon particles downstream widens the soot region with height. For all fuels tested, the most probable radius is between 20 nm and 50 nm, and it changes only slightly with height and distance from the fuel surface.

Beier, R.A.; Pagni, P.J.

1981-12-01T23:59:59.000Z

191

Boundary conditions for Einstein's field equations: Analytical and numerical analysis  

E-Print Network (OSTI)

Outer boundary conditions for strongly and symmetric hyperbolic formulations of 3D Einstein's field equations with a live gauge condition are discussed. The boundary conditions have the property that they ensure constraint propagation and control in a sense made precise in this article the physical degrees of freedom at the boundary. We use Fourier-Laplace transformation techniques to find necessary conditions for the well posedness of the resulting initial-boundary value problem and integrate the resulting three-dimensional nonlinear equations using a finite-differencing code. We obtain a set of constraint-preserving boundary conditions which pass a robust numerical stability test. We explicitly compare these new boundary conditions to standard, maximally dissipative ones through Brill wave evolutions. Our numerical results explicitly show that in the latter case the constraint variables, describing the violation of the constraints, do not converge to zero when resolution is increased while for the new boundary conditions, the constraint variables do decrease as resolution is increased. As an application, we inject pulses of ``gravitational radiation'' through the boundaries of an initially flat spacetime domain, with enough amplitude to generate strong fields and induce large curvature scalars, showing that our boundary conditions are robust enough to handle nonlinear dynamics. We expect our boundary conditions to be useful for improving the accuracy and stability of current binary black hole and binary neutron star simulations, for a successful implementation of characteristic or perturbative matching techniques, and other applications. We also discuss limitations of our approach and possible future directions.

Olivier Sarbach; Manuel Tiglio

2004-12-22T23:59:59.000Z

192

BOUNDARY EFFECTS IN ROTATING-PLASMA EXPERIMENTS  

SciTech Connect

The problem of current continuity and viscous drag at the boundaries in rotating-plasma experiments is discussed. A hypothetical model having a steady state with axial symmetry is emphasized; it is shown that the discharge impedance derived from this model does not agree with many observations. The Homopolar III'' experiment is described in which the flux surfaces were strongly convex and parallel to the toroidal-shaped electrodes. In this way friction at the insulators was reduced. But the structure of the discharge deviated drastically from axial symmetry near the outer surface. Several studies led to the conclusion that the flow pattern probably involved secondary flows. A detailed analysis of this structure was not possible. It was also found that the rotational speed could not be raised above a few cm/ mu sec because the insulators failed in spite of the special design of the experiment. 28 references. (auth)

Kunkel, W.B.; Baker, W.R.; Bratenahl, A.; Halbach, K.

1962-08-01T23:59:59.000Z

193

Notes on parafermionic QFT's with boundary interaction  

E-Print Network (OSTI)

The main result of these notes is an analytical expression for the partition function of the circular brane model for arbitrary values of the topological angle. The model has important applications in condensed matter physics. It is related to the dissipative rotator (Ambegaokar-Eckern-Schon) model and describes a ``weakly blocked'' quantum dot with an infinite number of tunneling channels under a finite gate voltage bias. A numerical check of the analytical solution by means of Monte Carlo simulations has been performed recently. To derive the main result we study the so-called boundary parafermionic sine-Gordon model. The latter is of certain interest to condensed matter applications, namely as a toy model for a point junction in the multichannel quantum wire.

S. L. Lukyanov

2006-06-16T23:59:59.000Z

194

Reflection and transmission at dimensional boundaries  

E-Print Network (OSTI)

An inhomogeneous Kaluza-Klein compactification of a higher dimensional spacetime may give rise to an effective 4d spacetime with distinct domains having different sizes of the extra dimensions. The domains are separated by domain walls generated by the extra dimensional scale factor. The scattering of electromagnetic and massive particle waves at such boundaries is examined here for models without warping or branes. We consider the limits corresponding to thin (thick) domain walls, i.e., limits where wavelengths are large (small) in comparison to wall thickness. We also obtain numerical solutions for a wall of arbitrary thickness and extract the reflection and transmission coefficients as functions of frequency. Results are obtained which qualitatively resemble those for electroweak domain walls and other "ordinary" domain walls for 4d theories.

Nelson De Leon; John Morris

2006-08-16T23:59:59.000Z

195

A Comprehensive Investigation of Low Angle Grain Boundary ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Grain boundary mobility plays influential role in controlling the ... A New Treatment for the Kinetics of Isothermal Oxidation of Zinc Powders.

196

Solidification Behavior at Fusion Boundary Region in Dissimilar ...  

Science Conference Proceedings (OSTI)

Different dilutions were performed in the button arc melting process in order to simulate the fusion boundary region and then analyzed using SSDTA® technique.

197

Atomic-scale Characterization of Grain Boundary Embrittlement in ...  

Science Conference Proceedings (OSTI)

The present study was performed determine the grain boundary chemistry in .... Creep of Service-Exposed SUS 316 HTB Superheater Tubes of Fossil Boilers.

198

The Current-voltage Characteristics of Grain Boundaries in Ionic ...  

Science Conference Proceedings (OSTI)

Presentation Title, The Current-voltage Characteristics of Grain Boundaries in Ionic ... A High-temperature Mössbauer Study of Iron-doped Ruddlesden-popper  ...

199

A class of moving boundary problems arising in drying processes  

Science Conference Proceedings (OSTI)

Keywords: drying processes, heat and mass transfer, moving boundary value problems, multiphase flows in porous media, quasilinear parabolic systems, wellposedness of solutions

M. Ilic

1992-10-01T23:59:59.000Z

200

Grain Boundary Characterization of Solid Oxide Fuel Cell Cathode ...  

Science Conference Proceedings (OSTI)

However, little is known about the crystallographic nature of grain boundaries and pore ... Computer Simulations of Realistic Multi-Phase Three-Dimensional ...

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Atlantic NAD83 Submerged Lands Act Boundary | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

NAD83 Submerged Lands Act Boundary Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Atlantic...

202

Atlantic NAD 83 Continental Shelf Boundary (CSB) | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Continental Shelf Boundary (CSB) Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Atlantic NAD 83...

203

A Rate Equation for the Nocturnal Boundary-Layer Height  

Science Conference Proceedings (OSTI)

A rate equation is derived which describes the development of the boundary-layer height under stable conditions as a function of time.

F. T. M. Nieuwstadt; H. Tennekes

1981-07-01T23:59:59.000Z

204

Statistics of Grain Boundary Crystallography in Surrogates for Oxide ...  

Science Conference Proceedings (OSTI)

Presentation Title, Statistics of Grain Boundary Crystallography in Surrogates for ... of TIG Welded and Laser-surface Melted SUS 304 for Nuclear Power Plants.

205

The Structure of Uranium Dioxide Grain Boundaries and its ...  

Science Conference Proceedings (OSTI)

The atomic structures of symmetric ?5 tilt, ?5 twist, and amorphous grain boundaries in uranium dioxide are explored in this work using empirical potentials and ...

206

Effects of Grain Boundary Precipitation on Creep Rupture Properties ...  

Science Conference Proceedings (OSTI)

gas turbine disks 'JU5). For Alloy 706, a stabilizing heat treatment is proposed to improve the creep rupture life, which is performed to produced grain boundary ...

207

The Quantification of Resistance of Grain Boundaries to Short ...  

Science Conference Proceedings (OSTI)

Presentation Title, The Quantification of Resistance of Grain Boundaries to Short Fatigue Crack Propagation in Three-Dimensions in High Strength Al Alloys.

208

Boundary Layer Flame Spread over PMMA within the Initial ...  

Science Conference Proceedings (OSTI)

... INTRODUCTION Boundary layer-type flames are prevalent in wall fires, ceiling fires, and wind-driven fires on flat surfaces such as floors and roofs. ...

2011-11-03T23:59:59.000Z

209

Regional Scale Surface CO2 Exchange Estimates Using a Boundary...  

NLE Websites -- All DOE Office Websites (Extended Search)

boundary layer height, and equated entrainment rate with large-scale subsidence velocities obtained from (1) NCEP reanalysis, (2) the Rapid Update Cycle (RUC)...

210

Computed Grain Boundary Energies: Trends among Elements and ...  

Science Conference Proceedings (OSTI)

The energies computed for boundaries in different elements but with the ... In-Situ TEM Investigation of Interfacial Processes in Aqueous and Environmental ...

211

Study of the Relationship between Twin Boundary Fraction and ...  

Science Conference Proceedings (OSTI)

The twin boundary fraction, given as multiples of random distribution (MRD), ... Strain Gradient and Degradation in Magnetic Properties: Focus Transformer Steel.

212

The Mobility of Interfaces and Grain Boundaries from Molecular ...  

Science Conference Proceedings (OSTI)

Presentation Title, The Mobility of Interfaces and Grain Boundaries from Molecular ... A Hybrid Phase-Field / Transmission Electron Microscopy Approach for ...

213

Calculation of Grain Boundary Mobility in Slow-Moving Nickel ...  

Science Conference Proceedings (OSTI)

Grain boundaries with a wide range of mobility are selected in this study. .... Grains: Molecular-Dynamics Simulations and In-Situ Electron Microscopy Studies of ...

214

The Mobility and Grain Boundaries Study of Austenite-Ferrite ...  

Science Conference Proceedings (OSTI)

Atomic-Scale Modeling of the Mobility of Boundaries of Deformation Twins in .... Molecular-Dynamics Simulations and In-Situ Electron Microscopy Studies of ...

215

South Dakota-Minnesota Boundary Waters Commission (South Dakota...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Field Sites Power Marketing Administration Other Agencies You are here Home Savings South Dakota-Minnesota Boundary Waters Commission (South Dakota) South Dakota-Minnesota...

216

Effects of Grain Boundary Morphology and Dislocation Substructure ...  

Science Conference Proceedings (OSTI)

South Dakota School of Mines & Technology, Rapid City, SD 57701, USA. Abstract. An extensive investigation of the effects of grain boundary morphology.

217

ARM - Facility News Article  

NLE Websites -- All DOE Office Websites (Extended Search)

Satellite Service Conserves Cash Satellite Service Conserves Cash Bookmark and Share In April, operations personnel completed a series of cost-saving data communication changes at the ARM Climate Research Facility Southern Great Plains (SGP) locale. The T-1 telephone lines at the four SGP boundary facilities were replaced with satellite dish technology. This change still allows large data sets to be transferred at acceptable bandwidth but at substantial savings. Inexpensive satellite services now meet data transmission needs at the SGP boundary facilities. Inexpensive satellite services now meet data transmission needs at the SGP boundary facilities. Huge amounts of data are collected daily by SGP site instruments. These data must be transmitted rapidly and reliably from remote measurement

218

Search for the decay B^+ \\to K_S^0 K_S^0 \\pi ^+  

SciTech Connect

The authors search for charmless decays of charged B mesons to the three-body final state K{sub S}{sup 0}K{sub S}{sup 0}{pi}{sup +}. Using a data sample of 423.7 fb{sup -1} collected at the {Upsilon}(4S) resonance with the BABAR detector, corresponding to (465.1 {+-} 5.1) x 10{sup 6} B{bar B} pairs, they find no significant signal and determine a 90% confidence level upper limit on the branching fraction of 5.1 x 10{sup -7}.

Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; Cahn, R.N.; Jacobsen, R.G.; /LBL, Berkeley /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /Bristol U. /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Karlsruhe U., EKP /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT, LNS /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /INFN, Naples /Naples U. /INFN, Naples /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /Rostock U. /Rutherford /DSM, DAPNIA, Saclay /South Carolina U. /SLAC /Stanford U., Phys. Dept. /SUNY, Albany /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

2009-02-23T23:59:59.000Z

219

Boundary integral methods for unsaturated flow  

Science Conference Proceedings (OSTI)

Many large simulations may be required to assess the performance of Yucca Mountain as a possible site for the nations first high level nuclear waste repository. A boundary integral equation method (BIEM) is described for numerical analysis of quasilinear steady unsaturated flow in homogeneous material. The applicability of the exponential model for the dependence of hydraulic conductivity on pressure head is discussed briefly. This constitutive assumption is at the heart of the quasilinear transformation. Materials which display a wide distribution in pore-size are described reasonably well by the exponential. For materials with a narrow range in pore-size, the exponential is suitable over more limited ranges in pressure head. The numerical implementation of the BIEM is used to investigate the infiltration from a strip source to a water table. The net infiltration of moisture into a finite-depth layer is well-described by results for a semi-infinite layer if {alpha}D > 4, where {alpha} is the sorptive number and D is the depth to the water table. the distribution of moisture exhibits a similar dependence on {alpha}D. 11 refs., 4 figs.,

Martinez, M.J.; McTigue, D.F.

1990-12-31T23:59:59.000Z

220

Enterprises as systems: Context, boundaries, and practical implications  

Science Conference Proceedings (OSTI)

The focus of this paper is to describe the domain of enterprise analysis. This is accomplished through an exploration of relevant definitions, a discussion on boundaries, and a summary of practical implications for researchers and practitioners. Specifically, ... Keywords: Enterprise boundaries, enterprise analysis, enterprise architecting, enterprise integration, enterprise transformation, lean

Ricardo Valerdi; Deborah Nightingale; Craig Blackburn

2008-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Model of Trace Gas Flux in Boundary Layer  

E-Print Network (OSTI)

Mathematical model of the turbulent flux in the three-layer boundary system is presented. Turbulence is described as a presence of the nonzero vorticity. Generalized advection-diffusion-reaction equation is derived for arbitrary number components in the flux. The fluxes in the layers are objects for matching requirements on the boundaries between the layers.

I. I. Vasenev; I. S. Nurgaliev

2013-03-04T23:59:59.000Z

222

A modified boundary integral evolution formulation for the wave equation  

Science Conference Proceedings (OSTI)

We apply a modified boundary integral formulation otherwise known as the Green element method (GEM) to the solution of the two-dimensional scalar wave equation. GEM essentially combines three techniques namely: (a) finite difference approximation of ... Keywords: Boundary element method, Green element method, Overhauser elements, Wave equation

Okey Oseloka Onyejekwe

2009-07-01T23:59:59.000Z

223

Visualization of the Operating Boundaries (VOB) 1.0  

Science Conference Proceedings (OSTI)

Visualization of the Operating Boundaries (VOB) 1.0 provides visualization of power system operating boundaries and margins.Benefits & ValueImprove situational awarenessOperator-friendly graphical user interface (GUI)Consolidate of multiple data sources for visualizationOperating SystemWindows XP/Vista/7Internet Explorer 8 or ...

2012-12-14T23:59:59.000Z

224

Evolution of a Marine Boundary-Layer Jet  

Science Conference Proceedings (OSTI)

High-resolution profiles of temperature and wind-speed measurements were made with a tethered baloon in and above the marine boundary layer at San Nicolas Island (SNI) during a period when the cloud-free boundary layer grew from near the sea ...

H. Gerber; Simon Chang; Teddy Holt

1989-05-01T23:59:59.000Z

225

An immersed boundary method for complex incompressible flows  

Science Conference Proceedings (OSTI)

An immersed boundary method for time-dependent, three-dimensional, incompressible flows is presented in this paper. The incompressible Navier-Stokes equations are discretized using a low-diffusion flux splitting method for the inviscid fluxes and second-order ... Keywords: High Reynolds number flows, Immersed boundary method, Incompressible Navier-Stokes equations

Jung-Il Choi; Roshan C. Oberoi; Jack R. Edwards; Jacky A. Rosati

2007-06-01T23:59:59.000Z

226

Linear and nonlinear degenerate boundary value problems in Besov spaces  

Science Conference Proceedings (OSTI)

The boundary value problems for linear and nonlinear degenerate differential-operator equations in Banach-valued Besov spaces are studied. Several conditions for the separability of linear elliptic problems are given. Moreover, the positivity and the ... Keywords: Banach-valued Besov spaces, Boundary value problems, Differential-operator equations, Interpolation of Banach spaces, Operator-valued multipliers

Veli B. Shakhmurov; Ravi P. Agarwal

2009-03-01T23:59:59.000Z

227

A major lithospheric boundary in eastern California defined by isotope  

Open Energy Info (EERE)

major lithospheric boundary in eastern California defined by isotope major lithospheric boundary in eastern California defined by isotope ratios in Cenozoic basalts from the Coso Range and surrounding areas Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: A major lithospheric boundary in eastern California defined by isotope ratios in Cenozoic basalts from the Coso Range and surrounding areas Details Activities (1) Areas (1) Regions (0) Abstract: Sr and Nd isotope ratios of Miocene-Recent basalts in eastern California, when screened for crustal contamination, vary dramatically and indicate the presence of a major lithospheric boundary that is not obvious from surface geology. Tectonic and geochemical interpretation of this boundary is difficult, however, because there are so many potential

228

Dusty boundary layer in a surface-burst explosion  

SciTech Connect

Dusty boundary layers are an inherent feature of explosions over ground surfaces. Detailed knowledge of dusty boundary layer characteristics is needed in explosion safety analysis (e.g., to calculate the drag loads on structures). Also, to predicct the amount of dust in the rising fireball of an explsion, one must know the dusty boundary layer swept up during the positive and negative phases of the blast wave and how much of this boundary layer dust is entrained into the stem of the dust cloud. This paper describes the results of numerical simulations of the dusty boundary layer created by a surface burst explosion. The evolution of the flow was calculated by a high-order Godunov code that solves the nonsteady conservation laws.

Kuhl, A.L. [Lawrence Livermore National Lab., El Segundo, CA (United States); Ferguson, R.E.; Chien, K.Y.; Collins, J.P. [Naval Surface Warfare Center, Silver Spring, MD (United States)

1993-08-01T23:59:59.000Z

229

South Dakota-Minnesota Boundary Waters Commission (Minnesota) | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Dakota-Minnesota Boundary Waters Commission (Minnesota) Dakota-Minnesota Boundary Waters Commission (Minnesota) South Dakota-Minnesota Boundary Waters Commission (Minnesota) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Minnesota Program Type Environmental Regulations This section establishes an interstate commission to set standards for

230

A Cartesian embedded boundary method for hyperbolic conservation laws  

SciTech Connect

The authors develop an embedded boundary finite difference technique for solving the compressible two- or three-dimensional Euler equations in complex geometries on a Cartesian grid. The method is second order accurate with an explicit time step determined by the grid size away from the boundary. Slope limiters are used on the embedded boundary to avoid non-physical oscillations near shock waves. They show computed examples of supersonic flow past a cylinder and compare with results computed on a body fitted grid. Furthermore, they discuss the implementation of the method for thin geometries, and show computed examples of transonic flow past an airfoil.

Sjogreen, B; Petersson, N A

2006-12-04T23:59:59.000Z

231

Boundary Waters Canoe Area (Minnesota) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Boundary Waters Canoe Area (Minnesota) Boundary Waters Canoe Area (Minnesota) Boundary Waters Canoe Area (Minnesota) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Minnesota Program Type Environmental Regulations The Boundary Waters Canoe Area occupies a large section of northern Minnesota, and is preserved as a primitive wilderness area. Construction

232

Convective Boundary Layers Driven by Nonstationary Surface Heat Fluxes  

Science Conference Proceedings (OSTI)

In this study the response of dry convective boundary layers to nonstationary surface heat fluxes is systematically investigated. This is relevant not only during sunset and sunrise but also, for example, when clouds modulate incoming solar ...

Robert van Driel; Harm J. J. Jonker

2011-04-01T23:59:59.000Z

233

Composite Structure of Plumes in Stratus-topped Boundary Layers  

Science Conference Proceedings (OSTI)

Knowledge of convective plumes within the clear convective boundary layer (CBL) is quite advanced owing to direct measurements, tank experiments, and large-eddy simulation studies. As a result, modeling of the CBL is relatively successful. ...

Chin-Hoh Moeng; Ulrich Schumann

1991-10-01T23:59:59.000Z

234

Countergradient vorticity Flux Generated in Continental Boundary Currents  

Science Conference Proceedings (OSTI)

It is suggested that the inshore shear of continental boundary flows like the Florida Current can be accounted for by a countergradient vorticity flux, rather than by lateral diffusion to the shore. Two simple barotropic models with cross-stream ...

Melvin E. Stern

1991-11-01T23:59:59.000Z

235

Grain boundary dynamics in stripe phases of non potential systems  

E-Print Network (OSTI)

We describe numerical solutions of two non potential models of pattern formation in nonequilibrium systems to address the motion and decay of grain boundaries separating domains of stripe configurations of different orientations. We first address wavenumber selection because of the boundary, and possible decay modes when the periodicity of the stripe phases is different from the selected wavenumber for a stationary boundary. We discuss several decay modes including long wavelength undulations of the moving boundary as well as the formation of localized defects and their subsequent motion. We find three different regimes as a function of the distance to the stripe phase threshold and initial wavenumber, and then correlate these findings with domain morphology during domain coarsening in a large aspect ratio configuration.

Zhi-Feng Huang; Jorge Vinals

2006-12-11T23:59:59.000Z

236

Measurements of Boundary Layer Profiles in an Urban Environment  

Science Conference Proceedings (OSTI)

Boundary layer profiles of mean temperature, velocity, and small-scale turbulence from in situ sensors, Doppler lidar, sodar, and rawinsondes are intercompared for an urban environment. A new Doppler lidar algorithm is presented to produce high-...

Rod Frehlich; Yannick Meillier; Michael L. Jensen; Ben Balsley; Robert Sharman

2006-06-01T23:59:59.000Z

237

Multiscale Large Eddy States in Weakly Stratified Planetary Boundary Layers  

Science Conference Proceedings (OSTI)

We first discuss observations of two classes of two-dimensional large eddy states in weakly stratified atmospheric boundary layers. One class is characterized by large eddies with a single horizontal scale. The other contains multiscale large ...

Pierre D. Mourad; Robert A. Brown

1990-02-01T23:59:59.000Z

238

Energy Dissipation and Upwelling in a Western Boundary Current  

Science Conference Proceedings (OSTI)

Energy dissipation in a western boundary current begins with the conversion of mean potential energy into kinetic energy of “primary” eddies. The rate of this energy conversion is taken to equal the total energy dissipation rate, in analogy with ...

G. T. Csanady

1989-04-01T23:59:59.000Z

239

Dispersion of Small Suspended Particles in a Wave Boundary Layer  

Science Conference Proceedings (OSTI)

The dispersion of heavy suspensions in a wave boundary layer over a nonerodible bed is examined theoretically. Focusing attention on the horizontal variation of the ambient wave pattern, an effective convection-diffusion equation is derived by ...

Chiang C. Mei; Chimin Chian

1994-12-01T23:59:59.000Z

240

Boundary-layer updrafts driven by airflow over heated terrain  

Science Conference Proceedings (OSTI)

This study presents linear and nonlinear scalings for boundary-layer ascent forced by airflow over heated terrain and compares them to results from corresponding high-resolution numerical simulations. Close agreement between theory and simulation ...

Daniel J. Kirshbaum; Chun-Chih Wang

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Toward Convective Boundary Layer Parameterization: A Scalar Transport Module  

Science Conference Proceedings (OSTI)

Recent results from large-eddy simulations indicate that the eddy diffusivity for scalar diffusion through the top of a convective boundary layer is different from that for diffusion through the bottom. From this, one can show that the eddy ...

John C. Wyngaard

1984-06-01T23:59:59.000Z

242

Boundary Layer Oscillations from Thunderstorms at Sydney Airport  

Science Conference Proceedings (OSTI)

Analyses of wind velocity and air pressure data, acquired by a set of low-level anemometers at Sydney Airport, Australia, indicate the passage of a set of three remarkably smooth atmospheric boundary layer oscillations that traveled ahead of a ...

Richard Manasseh; Jason H. Middleton

1995-04-01T23:59:59.000Z

243

The Influence of Preexisting Boundaries on Supercell Evolution  

Science Conference Proceedings (OSTI)

A three-dimensional nonhydrostatic cloud model is used to study the evolution of supercell thunderstorms, with emphasis on the low-level mesocyclone, interacting with preexisting boundaries. The impacts of low-level environmental shear, storm ...

Nolan T. Atkins; Morris L. Weisman; Louis J. Wicker

1999-12-01T23:59:59.000Z

244

The Surface Boundary Layer in Coastal Upwelling Regions  

Science Conference Proceedings (OSTI)

Observations from the Oregon, northwest Africa, Peru, and northern California shelves are used to examine the characteristics of the surface boundary layer in coastal regions during the upwelling season. The observations from these four regions ...

Steven J. Lentz

1992-12-01T23:59:59.000Z

245

Observed Diurnal Cycle Climatology of Planetary Boundary Layer Height  

Science Conference Proceedings (OSTI)

An observational climatology of the planetary boundary layer height (PBLH) diurnal cycle, specific to surface characteristics, is derived from 58 286 fine-resolution soundings collected in 14 major field campaigns around the world. An objective ...

Shuyan Liu; Xin-Zhong Liang

2010-11-01T23:59:59.000Z

246

A “Balanced” Approach to Stable Boundary Layer Dynamics  

Science Conference Proceedings (OSTI)

Semiempirical arguments from Roach and Nieuwstadt concerning Richardson numbers Ri, Rf in stably stratified shear layers and boundary layers appear to bypass uncertainties of turbulence closures. Here it is shown that these arguments can be ...

S. H. Derbyshire

1994-12-01T23:59:59.000Z

247

Gust Structure in the Neutral Surface Boundary Layer  

Science Conference Proceedings (OSTI)

Measured characteristics of gust amplitudes and times in the neutral surface boundary layer are presented. The probability of gust amplitudes exceeding a prescribed level is shown to decrease exponentially with amplitude, provided the amplitude ...

J. C. Doran; D. C. Powell

1982-01-01T23:59:59.000Z

248

A Study of Tornadic Thunderstorm Interactions with Thermal Boundaries  

Science Conference Proceedings (OSTI)

It has been frequently observed that thunderstorms which interact with a warm front, or an old thunder-storm outflow boundary, are likely to increase in severity and become tornadic. The physical mechanisms responsible for this observed ...

Robert A. Maddox; L. Ray Hoxit; Charles F. Chappell

1980-03-01T23:59:59.000Z

249

Analysis of Outflow Boundary Collisions in North-Central Alabama  

Science Conference Proceedings (OSTI)

Ninety-four outflow boundary (OB) collisions were documented in north-central Alabama over the summers of 2005–07 using the Advanced Radar for Meteorological and Operational Research (ARMOR) dual-polarimetric radar located at the Huntsville, ...

Stephen J. Harrison; John R. Mecikalski; Kevin R. Knupp

2009-12-01T23:59:59.000Z

250

Measurements of the Marine Boundary Layer from an Airship  

Science Conference Proceedings (OSTI)

In 1992 and 1993, the authors made measurements of the marine boundary layer off the coast of Oregon from an airship. In 1992, these measurements consisted of coherent microwave backscatter measurements at Ku band taken from the gondola of the ...

William J. Plant; William C. Keller; Vahid Hesany; Kenneth Hayes; Karl W. Hoppel; Theodore V. Blanc

1998-12-01T23:59:59.000Z

251

Some Turbulence Characteristics in Stable Atmospheric Boundary Layer Flow  

Science Conference Proceedings (OSTI)

Atmospheric boundary layer measurements during stable and near neutral condition from seven sites in different kinds of terrain have been analyzed in order to find relationships among turbulence parameters.

Ann-Sofi Smedman

1991-03-01T23:59:59.000Z

252

The Import Threat : Detroit's Boundary Objects During the 1980s  

E-Print Network (OSTI)

ler who sold the car to the consumer, the bank that provided financing to the consumer, the marketing agency that created the advertisements that enticed the consumer to buy the car, the group of individuals who assembled the car, the corporation that hired and trained those individuals, the corporation that provided the tyres, the corporation that provided the rubber for the tyres,... and finally, the government that established the trade policies that made the creation of that car possible and profitable. Coordinating activity and information amongst these various actors is not an easy task. They each have different motivations and goal and lack a common perspective or language. Inter-organizational communication requires a special animal: the Boundary Object. Boundary Objects Star and Griesemer (1989) introduced the Boundary Object to the field of Science Studies. Although they were studying how scientists collected samples for a museum nearly a century ago, Boundary Objects have b

George Goodall

2003-01-01T23:59:59.000Z

253

Dynamical Modeling of Flow in Cumulus-Filled Boundary Layers  

Science Conference Proceedings (OSTI)

A primitive equation planetary boundary layer (PBL) model is constructed and applied to simulate the downwind evolution of coupled dynamic, thermodynamic and cloud properties in the PBL over warmer mean. A multilayered approach is adopted to ...

Chiu-Wai Yuen

1985-01-01T23:59:59.000Z

254

Daytime Evolution of Relative Humidity at the Boundary Layer Top  

Science Conference Proceedings (OSTI)

Data from the Hydrological and Atmospheric Pilot Experiment-Modélisation du Bilan Hydrigue (HAPEX-MOBILHY) field program and results from a one-dimensional model of the soil and atmospheric boundary layer are analyzed to study the daytime ...

M. Ek; L. Mahrt

1994-12-01T23:59:59.000Z

255

The Eastern Boundary of the Subtropical North Atlantic  

Science Conference Proceedings (OSTI)

A quasi-meridional hydrographic section carried out between 60° and 20°N offshore from the European and African continental slopes is analyzed in terms of water masses and zonal transports in and out of the eastern boundary. Outstanding features ...

M. Arhan; A. Colin De Verdiére; L. Mémery

1994-06-01T23:59:59.000Z

256

Grain-Boundary Physics in Polycrystalline Photovoltaic Materials: Preprint  

DOE Green Energy (OSTI)

This paper describes a study of the atomic structure and electronic effects of grain boundaries in polycrystalline photovoltaic materials such as Si, CdTe, CuInSe2, and CuGaSe2.

Yan, Y.; Jiang, C. S.; Wu, X. Z.; Noufi, R.; Wei, S. H.; Al-Jassim, M. M.

2008-05-01T23:59:59.000Z

257

Surface Boundary Conditions for Mesoscale Regional Climate Models  

Science Conference Proceedings (OSTI)

This paper utilizes the best available quality data from multiple sources to develop consistent surface boundary conditions (SBCs) for mesoscale regional climate model (RCM) applications. The primary SBCs include 1) fields of soil characteristic (...

Xin-Zhong Liang; Hyun I. Choi; Kenneth E. Kunkel; Yongjiu Dai; Everette Joseph; Julian X. L. Wang; Praveen Kumar

2005-10-01T23:59:59.000Z

258

Federal Failures: The Ohio-Michigan Boundary Dispute.  

E-Print Network (OSTI)

??The Ohio-Michigan boundary dispute, that reached a climactic point in the mid 1830s, was the product of congressional neglect and oversight. Congress through the establishment… (more)

Badenhop, Stephen W.

2008-01-01T23:59:59.000Z

259

Social and Cultural Boundaries in Pre-Modern Poland.  

E-Print Network (OSTI)

??Boundaries—physical, political, social, religious, and cultural—were a key feature of life in medieval and early modern Poland, and this volume focuses on the ways in… (more)

Teter, Magda

2010-01-01T23:59:59.000Z

260

Changes in the Deep Western Boundary Current at 53°N  

Science Conference Proceedings (OSTI)

Southward transports in the deep western boundary current across 53°N, over 1949–99, are determined from a historical reconstruction. Long-term mean transports, for given water masses, for net southward transport (the southward component of the ...

Paul G. Myers; Nilgun Kulan

2012-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Boundary Layer Clouds and Vegetation–Atmosphere Feedbacks  

Science Conference Proceedings (OSTI)

An analysis of boundary layer cumulus clouds and their impact on land surface–atmosphere exchange is presented. Seasonal trends indicate that in response to increasing insolation and sensible heat flux, both the mixed-layer height (zi) and the ...

Jeffrey M. Freedman; David R. Fitzjarrald; Kathleen E. Moore; Ricardo K. Sakai

2001-01-01T23:59:59.000Z

262

Observations of Boundary Mixing over the Continental Slope  

Science Conference Proceedings (OSTI)

Observations of mixing over the continental slope using a towed body reveal a great lateral extent (several kilometers) of continuously turbulent fluid within a few hundred meters of the boundary at depth 1600 m. The largest turbulent dissipation ...

J. N. Moum; D. R. Caldwell; J. D. Nash; G. D. Gunderson

2002-07-01T23:59:59.000Z

263

Coastal Boundary Layer Characteristics during Summer Stratification in Lake Ontario  

Science Conference Proceedings (OSTI)

Simultaneous measurements of Eulerian and Lagrangian currents along the north shore of Lake Ontario are analyzed to provide the mean flow properties and horizontal turbulent exchange characteristics in the coastal boundary layer (CBL). The summer ...

Y. R. Rao; C. R. Murthy

2001-04-01T23:59:59.000Z

264

Analytical Parameterizations of Diffusion: The Convective Boundary Layer  

Science Conference Proceedings (OSTI)

A brief review is made of data bases which have been used for developing diffusion parameterizations for the convective boundary layer (CBL). A variety of parameterizations for lateral and vertical dispersion, ?y and ?z, are surveyed; some of ...

Gary A. Briggs

1985-11-01T23:59:59.000Z

265

Nonlocal Treatment of the Buoyancy-Shear-Driven Boundary Layer  

Science Conference Proceedings (OSTI)

A successful description of a convective boundary layer requires that the model employed takes into account the nonlocal nature of turbulent convection. In this paper new third-order moments (TOMs) are presented and tested. Numerical solutions ...

E. Ferrero; N. Colonna

2006-10-01T23:59:59.000Z

266

Observations of Vertical Wind Shear Heterogeneity in Convective Boundary Layers  

Science Conference Proceedings (OSTI)

Dual-Doppler wind syntheses from mobile radar observations obtained during the International H2O Project document some of the spatial variability of vertical wind profiles in convective boundary layers. Much of the variability of popular ...

Paul Markowski; Yvette Richardson

2007-03-01T23:59:59.000Z

267

A Second-Order Bulk Boundary-Layer Model  

Science Conference Proceedings (OSTI)

Bulk mass-flux models represent the large eddies that are primarily responsible for the turbulent fluxes in the planetary boundary layer as convective circulations, with an associated convective mass flux. In order for such models to be useful, ...

David A. Randall; Qingqiu Shao; Chin-Hoh Moeng

1992-10-01T23:59:59.000Z

268

Spectral Characteristics of the Convective Boundary Layer Over Uneven Terrain  

Science Conference Proceedings (OSTI)

The paper describes a convective boundary layer experiment conducted in April 1978 at the Boulder Atmospheric Observatory, and examines the spectral behavior of wind velocity and temperature from the Observatory's 300 m tower, from aircraft ...

J. C. Kaimal; R. A. Eversole; D. H. Lenschow; B. B. Stankov; P. H. Kahn; J. A. Businger

1982-05-01T23:59:59.000Z

269

Boundary Layer Characteristics over Areas of Inhomogeneous Surface Fluxes  

Science Conference Proceedings (OSTI)

This paper describes results from a June 1992 field program to study the response of the boundary layer over a site with well-defined extreme differences in sensible and latent heat fluxes over clearly separated areas, each with characteristic ...

J. C. Doran; W. J. Shaw; J. M. Hubbe

1995-02-01T23:59:59.000Z

270

Optimization Approach to the Treatment of Open Boundary Conditions  

Science Conference Proceedings (OSTI)

A solution to an optimization problem is developed that deals with minimizing a measure of difference between the values of observed and predicted variables at an open ocean boundary. Minimization is based on the change of the flux of energy ...

I. Shulman; James K. Lewis

1995-05-01T23:59:59.000Z

271

Sensitivity of Boundary-layer and Deep Convective Cloud Simulations...  

NLE Websites -- All DOE Office Websites (Extended Search)

convective clouds using a cloud resolving model (CRM). A CRM usually uses a vertical grid spacing less than 100 m to simulate boundary layer clouds such as shallow cumuli and...

272

Elastic Strain Energy Effects on Grain Boundary Segregation and ...  

Science Conference Proceedings (OSTI)

Symposium, Integrated Computational Materials Engineering: Modeling and Simulation Applied to Metals Processing. Presentation Title, Elastic Strain Energy Effects on Grain Boundary ... Diffusivity and Mobility Data: Building Blocks for ICME.

273

Estuarine Boundary Layer Mixing Processes: Insights from Dye Experiments  

Science Conference Proceedings (OSTI)

A series of dye releases in the Hudson River estuary elucidated diapycnal mixing rates and temporal variability over tidal and fortnightly time scales. Dye was injected in the bottom boundary layer for each of four releases during different ...

Robert J. Chant; Wayne R. Geyer; Robert Houghton; Elias Hunter; James Lerczak

2007-07-01T23:59:59.000Z

274

Low-Frequency Baroclinic Waves off Coastal Boundaries  

Science Conference Proceedings (OSTI)

The behavior of low-frequency baroclinic Rossby wave motion in the vicinity of coastal boundaries is investigated using linearized modulated wave theory in a stratified, constant-depth, equatorial ?-plane ocean. A primary objective is to obtain ...

R. Grimshaw; J. S. Allen

1988-08-01T23:59:59.000Z

275

Pseudospectral Technique for Calculation of Atmospheric Boundary Layer Flows  

Science Conference Proceedings (OSTI)

A pseudospectral method and its numerical solution algorithm for application to boundary layer problems in the atmosphere are presented. The method introduces the evaluation of a polynomial function when the solution is expressed as the sum of a ...

H. N. Lee; J. K. Shi

1986-11-01T23:59:59.000Z

276

Intermittent and Elliptical Inertial Oscillations in the Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

As a convective boundary layer over land decays in the late afternoon, the atmosphere responds to the release of turbulent stresses. For many years, this response has been presumed to take the form of an inertial oscillation, a horizontal ...

Julie K. Lundquist

2003-11-01T23:59:59.000Z

277

Pushing Boundaries on Performance & Design: the ClimateMaster...  

NLE Websites -- All DOE Office Websites (Extended Search)

Boundaries on Performance & Design: the ClimateMaster Trilogy 40 Q-Mode(tm) Geothermal Heat Pump August 01, 2013 The ClimateMaster Trilogy 40 Q-Mode(tm) Geothermal Heat...

278

Benthic Boundary-Layer Velocity Profiles: Dependence on Averaging Period  

Science Conference Proceedings (OSTI)

The relationship between benthic boundary-layer velocity profiles and current meter averaging time is investigated using detailed (0.61 Hz) current measurements recorded within 1 m of the bottom on the inner continental shelf. The percentage of ...

Barry M. Lesht

1980-06-01T23:59:59.000Z

279

Drizzle in Stratiform Boundary Layer Clouds. Part II: Microphysical Aspects  

Science Conference Proceedings (OSTI)

This is the second of two observational papers examining drizzle in stratiform boundary layer clouds. Part I details the vertical and horizontal structure of cloud and drizzle parameters, including some bulk microphysical variables. In this paper,...

R. Wood

2005-09-01T23:59:59.000Z

280

Marine Boundary Layer Cloud Observations in the Azores  

Science Conference Proceedings (OSTI)

The recent deployment of the Atmospheric Radiation Measurement Program (ARM) Mobile Facility at Graciosa Island, Azores, in the context of the Clouds, Aerosol and Precipitation in the Marine Boundary Layer (CAP-MBL) field campaign added the most ...

Jasmine Rémillard; Pavlos Kollias; Edward Luke; Robert Wood

2012-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

On Boundary Value Problems of the Ideal-Fluid Thermocline  

Science Conference Proceedings (OSTI)

Recent developments of ideal-fluid thermocline models are briefly reviewed. Using density coordinates, boundary value problems are formulated for the ideal-fluid thermocline with continuous stratification. Ekman pumping and surface density are ...

Rui Xin Huang

1988-04-01T23:59:59.000Z

282

One-Month Forecast Experiments—without Anomaly Boundary Forcings  

Science Conference Proceedings (OSTI)

A series of one-month forecasts were carried out for eight January cases, using a particular prediction model and prescribing climatological sea-surface temperature as the boundary condition. Each forecast is a stochastic prediction that consists ...

K. Miyakoda; J. Sirutis; J. Ploshay

1986-12-01T23:59:59.000Z

283

Radiative Cooling Effects within and above the Nocturnal Boundary Layer  

Science Conference Proceedings (OSTI)

For representative tropospheric profiles of water vapor, CO2 and temperature we have calculated in situ longwave radiative flux divergence for use in a simplified second-order closure model of nocturnal boundary-layer evolution. The time ...

J. R. Garratt; R. A. Brost

1981-12-01T23:59:59.000Z

284

Nonlinear Evolution of Linearly Unstable Barotropic Boundary Currents  

Science Conference Proceedings (OSTI)

The nonlinear evolution of linearly unstable barotropic boundary currents, consisting of three piecewise uniform vorticity regions, was investigated using the contour dynamics method. A physical interpretation of the nonlinear behavior of the ...

Koji Shimada; Atsushi Kubokawa

1997-07-01T23:59:59.000Z

285

Large-Eddy Simulation of the Convective Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

Large-eddy simulations of a free convective atmospheric boundary layer with an overlying capping inversion are considered. Attention is given to the dependence of the results upon the various factors influencing the simulation: the subgrid model, ...

P. J. Mason

1989-06-01T23:59:59.000Z

286

The Temporal Behavior of the Atmospheric Boundary Layer in Israel  

Science Conference Proceedings (OSTI)

Upper-air measurements collected for three consecutive years (1987–89) from the Israel Meteorological Service permanent sounding site, in Beit-Dagan, Israel, enabled the temporal behavior of the atmospheric boundary layer over Israel to be ...

Uri Dayan; Jacob Rodnizki

1999-06-01T23:59:59.000Z

287

Lidar Observation of the Atmospheric Boundary Layer in Jerusalem  

Science Conference Proceedings (OSTI)

The temporal variation of the atmospheric boundary layer (ABL) over Jerusalem is accurately measured by means of a lidar system. The findings are explained and discussed based on the specific synoptic situation of typical summer days in the ...

Ram Hashmonay; Ariel Cohen; Uri Dayan

1991-08-01T23:59:59.000Z

288

Evolution of Nitrogen Oxide Chemistry in the Nocturnal Boundary Layer  

Science Conference Proceedings (OSTI)

The nocturnal cycle of nitrogen oxides in the atmospheric boundary layer is studied by means of a one-dimensional model. The model solves the conservation equations of momentum, entropy, total water content, and of five chemical species. The ...

S. Galmarini; P. G. Duynkerke; J. Vilà-Guerau de Arellano

1997-07-01T23:59:59.000Z

289

The Nocturnal Boundary Layer: Model Calculations Compared with Observations  

Science Conference Proceedings (OSTI)

The structure and evolution of the nocturnal boundary layer (NBL) is simulated using a model which includes the transfer of energy by radiation and turbulence. The radiation scheme is an accurate narrow band model which simulates the absorption ...

Stephen A. Tjemkes; Peter G. Duynkergke

1989-03-01T23:59:59.000Z

290

Dynamics and Boundary Layer Processes in Two Asian Cyclones  

Science Conference Proceedings (OSTI)

An explosive and nonexplosive cyclone that developed during March 1986 along the coast of Japan are analyzed to illustrate the possible interaction of moist baroclinic dynamics, boundary layer structure and surface heat and moisture fluxes in ...

Wendell A. Nuss; Shun I. Kamikawa

1990-03-01T23:59:59.000Z

291

Racoro Extended-Term Aircraft Observations of Boundary Layer Clouds  

Science Conference Proceedings (OSTI)

A first-of-a-kind, extended-term cloud aircraft campaign was conducted to obtain an in situ statistical characterization of continental boundary layer clouds needed to investigate cloud processes and refine retrieval algorithms. Coordinated by the ...

Andrew M. Vogelmann; Greg M. McFarquhar; John A. Ogren; David D. Turner; Jennifer M. Comstock; Graham Feingold; Charles N. Long; Haflidi H. Jonsson; Anthony Bucholtz; Don R. Collins; Glenn S. Diskin; Hermann Gerber; R. Paul Lawson; Roy K. Woods; Elisabeth Andrews; Hee-Jung Yang; J. Christine Chiu; Daniel Hartsock; John M. Hubbe; Chaomei Lo; Alexander Marshak; Justin W. Monroe; Sally A. McFarlane; Beat Schmid; Jason M. Tomlinson; Tami Toto

2012-06-01T23:59:59.000Z

292

Boundary Layer Dynamics and Cross-Equatorial Hadley Circulation  

Science Conference Proceedings (OSTI)

The behavior of the Hadley circulation is analyzed in the context of an idealized axisymmetric atmosphere. It is argued that the cross-equatorial Hadley circulation exhibits two different regimes depending on the depth of the planetary boundary ...

Olivier Pauluis

2004-05-01T23:59:59.000Z

293

Physical Processes within the Nocturnal Stratus-topped Boundary Layer  

Science Conference Proceedings (OSTI)

Within the stratus-topped boundary layer many physical processes are involved: longwave radiation cooling, entrainment, latent heating, surface heating, solar heating, drizzling, etc. How all processes combine to maintain the turbulence within ...

Chin-Hoh Moeng; Shaohua Shen; David A. Randall

1992-12-01T23:59:59.000Z

294

Propagation of meridional circulation anomalies along western and eastern boundaries  

Science Conference Proceedings (OSTI)

Motivated by the adjustment of the meridional overturning circulation to localized forcing, solutions are presented from a reduced-gravity model for the propagation of waves along western and eastern boundaries. For wave periods exceeding a few ...

David P. Marshall; Helen L. Johnson

295

A Theory of Gravity Wave Absorption by a Boundary Layer  

Science Conference Proceedings (OSTI)

A one-layer model of the atmospheric boundary layer (BL) is proposed to explain the nature of lee-wave attenuation and gravity wave absorption seen in numerical simulations. Two complex coefficients are defined: the compliance coefficient and the ...

Ronald B. Smith; Qingfang Jiang; James D. Doyle

2006-02-01T23:59:59.000Z

296

Convectively Driven Mixing in the Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

Closely spaced vertical profiles through the bottom boundary layer over a sloping continental shelf during relaxation from coastal upwelling reveal structure that is consistent with convectively driven mixing. Parcels of fluid were observed ...

J. N. Moum; A. Perlin; J. M. Klymak; M. D. Levine; T. Boyd; P. M. Kosro

2004-10-01T23:59:59.000Z

297

Properties and Parameterization of the Stable Boundary Layer over Moderate Topography  

Science Conference Proceedings (OSTI)

Numerical simulations are used to investigate the impact on the stable boundary layer of moderate topography (with hill heights in some cases comparable to the undisturbed boundary layer depth). Area-averaged properties of the resulting boundary ...

A. R. Brown; N. Wood

2003-11-01T23:59:59.000Z

298

An Analysis of the Klemp and Durran Radiation Boundary Condition as Applied to Dissipative Internal Waves  

Science Conference Proceedings (OSTI)

Numerical simulations of the oceanic (atmospheric) boundary layer are complicated by the need to specify appropriate “outflow” or “radiation” boundary conditions at the artificial lower (upper) boundary of the computational domain. If the ...

Gregory P. Chini; Sidney Leibovich

2003-11-01T23:59:59.000Z

299

The Martin Boundary Of The Young-Fibonacci Lattice  

E-Print Network (OSTI)

In this paper we find the Martin boundary for the Young-Fibonacci lattice YF. Along with the lattice of Young diagrams, this is the most interesting example of a differential partially ordered set. The Martin boundary construction provides an explicit Poisson-type integral representation of non-negative harmonic functions on YF. The latter are in a canonical correspondence with a set of traces on Okada locally semisimple algebra.

Frederick M. Goodman; Sergei V. Kerov

1997-01-01T23:59:59.000Z

300

Mixing materials within zone boundaries using shape overlays  

SciTech Connect

Shape overlays provide a means of statically imposing a physical region containing specified material properties onto a zoned mesh. In the most general case, material interface boundaries are unrelated to mesh zone boundaries, causing zones to contain a mixture of materials, and the mesh itself is not uniform in physical space. We develop and apply an algorithm for shape overlays on nonorthogonal, nonuniform meshes in two dimensions. Examples of shape generation in a multiblock uid dynamics code are shown.

Grandy, J.

1997-04-22T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Metric deformation and boundary value problems in 3D  

E-Print Network (OSTI)

A novel perturbative method, proposed by Panda {\\it et al.} [1] to solve the Helmholtz equation in two dimensions, is extended to three dimensions for general boundary surfaces. Although a few numerical works are available in the literature for specific domains in three dimensions such a general analytical prescription is presented for the first time. An appropriate transformation is used to get rid of the asymmetries in the domain boundary by mapping the boundary into an equivalent sphere with a deformed interior metric. The deformed metric produces new source terms in the original homogeneous equation. A deformation parameter measuring the deviation of the boundary from a spherical one is introduced as a perturbative parameter. With the help of standard Rayleigh-Schr{\\"o}dinger perturbative technique the transformed equation is solved and the general solution is written down in a closed form at each order of perturbation. The solutions are boundary condition free and which make them widely applicable for various situations. Once the boundary conditions are applied to these general solutions the eigenvalues and the wavefunctions are obtained order by order. The efficacy of the method has been tested by comparing the analytic values against the numerical ones for three dimensional enclosures of various shapes. The method seems to work quite well for these shapes for both, Dirichlet as well as Neumann boundary conditions. The usage of spherical harmonics to express the asymmetries in the boundary surfaces helps us to consider a wide class of domains in three dimensions and also their fast convergence guarantees the convergence of the perturbative series for the energy. Direct applications of this method can be found in the field of quantum dots, nuclear physics, acoustical and electromagnetic cavities.

Subhasis Panda; S. Pratik Khastgir

2013-07-24T23:59:59.000Z

302

Boundary effects of electromagnetic vacuum fluctuations on charged particles  

E-Print Network (OSTI)

The effects of electromagnetic vacuum fluctuations with the boundary on charged particles is investigated. They may be observed via an electron interference experiment near the conducting plate, where boundary effects of vacuum fluctuations are found significant on coherence reduction of the electrons. The dynamics of the charge under the influence of quantized electromagnetic fields with a conducting plate is also studied. The corresponding stochastic equation of motion is derived in the semiclassical approximation, and the behavior of the charge's velocity fluctuations is discussed.

Tai-Hung Wu; Jen-Tsung Hsiang; Da-Shin Lee

2007-11-19T23:59:59.000Z

303

Boundary effects of electromagnetic vacuum fluctuations on charged particles  

E-Print Network (OSTI)

The effects of electromagnetic vacuum fluctuations with the boundary on charged particles is investigated. They may be observed via an electron interference experiment near the conducting plate, where boundary effects of vacuum fluctuations are found significant on coherence reduction of the electrons. The dynamics of the charge under the influence of quantized electromagnetic fields with a conducting plate is also studied. The corresponding stochastic equation of motion is derived in the semiclassical approximation, and the behavior of the charge's velocity fluctuations is discussed.

Wu, Tai-Hung; Lee, Da-Shin

2007-01-01T23:59:59.000Z

304

Boundary Conditions for Three-Body Scattering in Configuration Space  

E-Print Network (OSTI)

The asymptotic behavior of three-body scattering wave functions in configuration space is studied by considering a model equation that has the same asymptotic form as the Faddeev equations. Boundary conditions for the wave function are derived, and their validity is verified by numerical calculations. It is shown that these boundary conditions for the partial differential equation can be used to obtain accurate numerical solutions for the wave function.

G. L. Payne; W. Gloeckle; J. L. Friar

1999-08-18T23:59:59.000Z

305

Materials Handbook for Nuclear Plant Pressure Boundary Applications (2013)  

Science Conference Proceedings (OSTI)

Utility engineers require accurate structural materials properties and performance data to make decisions regarding the adequacy of materials for nuclear power applications. To meet this need, the Electric Power Research Institute (EPRI) publishes the Materials Handbook for Nuclear Plant Pressure Boundary Applications, which has been updated and revised since its initial publication in 1998. The primary focus of the handbook is on pressure boundary materials such as those used for piping ...

2013-03-28T23:59:59.000Z

306

Darboux transformation of boundary conditions of regular Dirac Sturm--Liouville problem  

E-Print Network (OSTI)

It is shown that boundary conditions of the Darboux transformed Dirac Sturm--Liouville problem are always zero-valued independently on boundary conditions of initial problem.

Ekaterina Pozdeeva; Alexander Tarasov

2007-11-11T23:59:59.000Z

307

Biofuel Boundaries: Estimating the Medium-Term Supply Potential of Domestic Biofuels  

E-Print Network (OSTI)

Biofuel Boundaries: Estimating the Medium-Term SupplyAugust 22, 2007 Biofuel Boundaries: Estimating the Medium-significant amount of liquid biofuel (equivalent to 30-100%

Jones, Andrew; O'Hare, Michael; Farrell, Alexander

2007-01-01T23:59:59.000Z

308

Boundary Layer Depth, Entrainment, and Decoupling in the Cloud-Capped Subtropical and Tropical Marine Boundary Layer  

Science Conference Proceedings (OSTI)

Estimates of marine boundary layer (MBL) depth and degree of decoupling for two regions of the subtropical and tropical east Pacific are presented using satellite observations from the Moderate Resolution Imaging Spectroradiometer (MODIS) and the ...

Robert Wood; Christopher S. Bretherton

2004-09-01T23:59:59.000Z

309

The influence of vortex pinning and grain boundary structure on critical currents across grain boundaries in YBa{sub 2}Cu{sub 3}O{sub x}.  

SciTech Connect

We have used studies of single grain boundaries in YBCO thin films and bulk bicrystals to study the influence of vortex pinning along a grain boundary on dissipation. The critical current density for transport across grain boundaries in thin films is typically more than an order of magnitude larger than that measured for transport across grain boundaries in bulk samples. For low disorientation angles, the difference in critical current density within the grains that form the boundary can contribute to the substantial differences in current density measured across the boundary. However, substantial differences exist in the critical current density across boundaries in thin film compared to bulk bicrystals even in the higher angle regime in which grain boundary dissipation dominates. The differences in critical current density in this regime can be understood on the basis of vortex pinning along the boundary.

Miller, D. J.

1998-10-27T23:59:59.000Z

310

Application of a Perturbation Recycling Method in the Large-Eddy Simulation of a Mesoscale Convective Internal Boundary Layer  

Science Conference Proceedings (OSTI)

An arrangement of boundary conditions is described and demonstrated that facilitates the large-eddy simulation (LES) of inhomogeneous boundary layers such as internal boundary layers. In addition to the domain where the internal boundary layer ...

Shane D. Mayor; Philippe R. Spalart; Gregory J. Tripoli

2002-08-01T23:59:59.000Z

311

Charge Transport Anisotropy Due to Grain Boundaries in Directionally  

NLE Websites -- All DOE Office Websites (Extended Search)

Charge Transport Anisotropy Due to Grain Charge Transport Anisotropy Due to Grain Boundaries in Directionally Crystallized Thin Films of Regio-Regular Poly(3-hexylthiophene) Semicrystalline polymers, such as polythiophenes, hold much promise as active layers in printable electronic devices such as photovoltaic cells, sensors, and thin film transistors. As organic semiconductors approach commercialization, there is a need to better understand the relationship between charge transport and microstructure, in particular, to identify the inherent bottlenecks to charge transport. In semicrystalline and polycrystalline materials, charge transport is most likely dominated by grain-boundary effects, although the exact mechanism is not well understood. Unfortunately, grain boundaries in semicrystalline thin films are difficult to characterize: the grains are too small to allow for measurements across individual grain boundaries (as is often done for polycrystalline films of small molecules) and bulk measurements are complicated by the unknown orientation of polymer chains within the grain. To better understand the effect of chain orientation on grain boundaries, we use anisotropic thin films of poly(3-hexylthiophene) (P3HT) - one of the most well-studied polymeric semiconductors, as a tool to study charge transport.

312

MLPG method for two-dimensional diffusion equation with Neumann's and non-classical boundary conditions  

Science Conference Proceedings (OSTI)

In this paper, a meshless local Petrov-Galerkin (MLPG) method is presented to treat parabolic partial differential equations with Neumann's and non-classical boundary conditions. A difficulty in implementing the MLPG method is imposing boundary conditions. ... Keywords: Finite differences, Heat equation, MLPG method, Neumann's boundary conditions, Non-classical integral boundary condition, Parabolic partial differential equations

S. Abbasbandy; A. Shirzadi

2011-02-01T23:59:59.000Z

313

Microsoft Word - Bell-BoundaryFiber_CX_2013  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Amanda Williams Amanda Williams Project Manager - TEP-TPP-3 Proposed Action: Bell-Boundary Fiber Project Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.7 - Fiber optic cable Location: Spokane and Pend Orielle counties, WA Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to install new fiber optic line along 90 miles of existing BPA transmission lines in Spokane and Pend Orielle counties in Washington (see Figure 1). It would extend from Bell Substation in Spokane, WA to Boundary Substation 8 miles north of Metaline Falls, WA. The fiber would be strung on the Bell-Boundary No. 1 transmission line and run through Sacheen and Cusick substations along the route. BPA would install overhead fiber optic cable on existing towers or on fiber optic wood poles where

314

A dual mass flux framework for boundary layer convection  

NLE Websites -- All DOE Office Websites (Extended Search)

A dual mass flux framework for boundary layer convection A dual mass flux framework for boundary layer convection Neggers, Roel European Centre for Medium-range Weather Forecasts (ECMWF) Category: Modeling A new convective boundary layer scheme is presented that is currently being developed for the Integrated Forecasting System (IFS) of the European Centre for Medium-range Weather Forecasts (ECMWF). Part of the total turbulent flux is modeled through advective mass flux by multiple updrafts, initialized at the surface. Two groups of updrafts are explicitly represented; i) updrafts that never reach their lifting condensation level, and ii) updrafts that condensate and become cloudy. Key new ingredient is the flexibility of the associated updraft area fractions, as a function of model state. As a result, an extra degree of freedom is introduced in the

315

Mineral Deformation at Earth's Core-Mantle Boundary  

NLE Websites -- All DOE Office Websites (Extended Search)

Mineral Deformation at Earth's Core-Mantle Boundary Print Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly solid (except for its liquid-iron outer core), this convection causes deformation of solid rocks by plastic flow. At the core-mantle boundary (CMB), 2900 km deep, seismologists have discovered that seismic waves travel faster in certain directions. This seismic anisotropy appears to be related to the deformation of the constituent minerals. To understand the deformation mechanisms of mineral phases at this depth, researchers from Yale and UC Berkeley re-created the ultrahigh pressures of the deep Earth at ALS Beamline 12.2.2 while conducting in situ x-ray diffraction experiments to probe changes in crystal orientations.

316

Mineral Deformation at Earth's Core-Mantle Boundary  

NLE Websites -- All DOE Office Websites (Extended Search)

Mineral Deformation at Earth's Core-Mantle Boundary Print Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly solid (except for its liquid-iron outer core), this convection causes deformation of solid rocks by plastic flow. At the core-mantle boundary (CMB), 2900 km deep, seismologists have discovered that seismic waves travel faster in certain directions. This seismic anisotropy appears to be related to the deformation of the constituent minerals. To understand the deformation mechanisms of mineral phases at this depth, researchers from Yale and UC Berkeley re-created the ultrahigh pressures of the deep Earth at ALS Beamline 12.2.2 while conducting in situ x-ray diffraction experiments to probe changes in crystal orientations.

317

Wind on the boundary for the Abelian sandpile model  

E-Print Network (OSTI)

We continue our investigation of the two-dimensional Abelian sandpile model in terms of a logarithmic conformal field theory with central charge c=-2, by introducing two new boundary conditions. These have two unusual features: they carry an intrinsic orientation, and, more strangely, they cannot be imposed uniformly on a whole boundary (like the edge of a cylinder). They lead to seven new boundary condition changing fields, some of them being in highest weight representations (weights -1/8, 0 and 3/8), some others belonging to indecomposable representations with rank 2 Jordan cells (lowest weights 0 and 1). Their fusion algebra appears to be in full agreement with the fusion rules conjectured by Gaberdiel and Kausch.

Philippe Ruelle

2007-07-25T23:59:59.000Z

318

Effects of mesoscale surface inhomogeneities on atmospheric boundary layer transfer  

SciTech Connect

Defining the nature of turbulent transfer over horizontally inhomogeneous surfaces remains one of the challenges in meteorology. Because the transfer of energy and momentum through the atmospheric boundary layer forms part of the lower boundary condition for global climate models (GCMs), the problem is important. Over the last two decades, advances in sensor and computer technology wave made good point measurements of turbulent fluxes fairly routine. A fundamental question with respect to climate models, however, is how such point measurements are related to average fluxes over the area of a GCM grid box. In this paper we will use data from the field program to depict the evolution of the boundary layer over adjacent, sharply contrasting surface types on two separate occasions. We will then use simple scaling based on the observations to argue that sub-gridscale motions would often be likely to significantly alter the estimates and resulting parameterizations of GCM-scale surface fluxes in the region.

Shaw, W.J.; Doran, J.C.; Hubbe, J.M.

1992-09-01T23:59:59.000Z

319

Boundary conditions on internal three-body wave functions  

SciTech Connect

For a three-body system, a quantum wave function {Psi}{sub m}{sup {ell}} with definite {ell} and m quantum numbers may be expressed in terms of an internal wave function {chi}{sub k}{sup {ell}} which is a function of three internal coordinates. This article provides necessary and sufficient constraints on {chi}{sub k}{sup {ell}} to ensure that the external wave function {Psi}{sub k}{sup {ell}} is analytic. These constraints effectively amount to boundary conditions on {chi}{sub k}{sup {ell}} and its derivatives at the boundary of the internal space. Such conditions find similarities in the (planar) two-body problem where the wave function (to lowest order) has the form r{sup |m|} at the origin. We expect the boundary conditions to prove useful for constructing singularity free three-body basis sets for the case of nonvanishing angular momentum.

Mitchell, Kevin A.; Littlejohn, Robert G.

1999-10-01T23:59:59.000Z

320

Optimal Control of a Parabolic Equation with Dynamic Boundary Condition  

SciTech Connect

We investigate a control problem for the heat equation. The goal is to find an optimal heat transfer coefficient in the dynamic boundary condition such that a desired temperature distribution at the boundary is adhered. To this end we consider a function space setting in which the heat flux across the boundary is forced to be an L{sup p} function with respect to the surface measure, which in turn implies higher regularity for the time derivative of temperature. We show that the corresponding elliptic operator generates a strongly continuous semigroup of contractions and apply the concept of maximal parabolic regularity. This allows to show the existence of an optimal control and the derivation of necessary and sufficient optimality conditions.

Hoemberg, D., E-mail: hoemberg@wias-berlin.de; Krumbiegel, K., E-mail: krumbieg@wias-berlin.de [Weierstrass Institute for Applied Mathematics and Stochastics, Nonlinear Optimization and Inverse Problems (Germany); Rehberg, J., E-mail: rehberg@wias-berlin.de [Weierstrass Institute for Applied Mathematics and Stochastics, Partial Differential Equations (Germany)

2013-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Mineral Deformation at Earth's Core-Mantle Boundary  

NLE Websites -- All DOE Office Websites (Extended Search)

Mineral Deformation at Earth's Core-Mantle Boundary Print Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly solid (except for its liquid-iron outer core), this convection causes deformation of solid rocks by plastic flow. At the core-mantle boundary (CMB), 2900 km deep, seismologists have discovered that seismic waves travel faster in certain directions. This seismic anisotropy appears to be related to the deformation of the constituent minerals. To understand the deformation mechanisms of mineral phases at this depth, researchers from Yale and UC Berkeley re-created the ultrahigh pressures of the deep Earth at ALS Beamline 12.2.2 while conducting in situ x-ray diffraction experiments to probe changes in crystal orientations.

322

Boundary Analysis for H2 Production by Fermentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Boundary Analysis for Boundary Analysis for H2 Production by Fermentation Submitted To: National Renewable Energy Laboratory by Tim Eggeman, Ph.D., P.E. Neoterics International March 12, 2004 Bioprocess * Energy * Chemicals * Polymers NEOTERICS INTERNATIONAL Using Technology to Create Business Innovation 303-358-6390 2319 S. Ellis Ct. time@frii.com Lakewood, CO 80228 March 12, 2004 Margaret Mann National Renewable Energy Laboratory 1617 Cole Boulevard, MS 1613 Golden, CO 80401 Dear Maggie: Enclosed is a conceptual design and order-of-magnitude economic analysis for the production of hydrogen by fermentation of carbohydrates under the following design basis:

323

Gradient zone boundary control in salt gradient solar ponds  

SciTech Connect

A method and apparatus for suppressing zone boundary migration in a salt gradient solar pond includes extending perforated membranes across the pond at the boundaries, between the convective and non-convective zones, the perforations being small enough in size to prevent individual turbulence disturbances from penetrating the hole, but being large enough to allow easy molecular diffusion of salt thereby preventing the formation of convective zones in the gradient layer. The total area of the perforations is a sizable fraction of the membrane area to allow sufficient salt diffusion while preventing turbulent entrainment into the gradient zone.

Hull, John R. (Downers Grove, IL)

1984-01-01T23:59:59.000Z

324

Contaminant Boundary at the Faultless Underground Nuclear Test  

SciTech Connect

The U.S. Department of Energy (DOE) and the Nevada Division of Environmental Protection (NDEP) have reached agreement on a corrective action strategy applicable to address the extent and potential impact of radionuclide contamination of groundwater at underground nuclear test locations. This strategy is described in detail in the Federal Facility Agreement and Consent Order (FFACO, 2000). As part of the corrective action strategy, the nuclear detonations that occurred underground were identified as geographically distinct corrective action units (CAUs). The strategic objective for each CAU is to estimate over a 1,000-yr time period, with uncertainty quantified, the three-dimensional extent of groundwater contamination that would be considered unsafe for domestic and municipal use. Two types of boundaries (contaminant and compliance) are discussed in the FFACO that will map the three-dimensional extent of radionuclide contamination. The contaminant boundary will identify the region wi th 95 percent certainty that contaminants do not exist above a threshold value. It will be prepared by the DOE and presented to NDEP. The compliance boundary will be produced as a result of negotiation between the DOE and NDEP, and can be coincident with, or differ from, the contaminant boundary. Two different thresholds are considered for the contaminant boundary. One is based on the enforceable National Primary Drinking Water Regulations for radionuclides, which were developed as a requirement of the Safe Drinking Water Act. The other is a risk-based threshold considering applicable lifetime excess cancer-risk-based criteria The contaminant boundary for the Faultless underground nuclear test at the Central Nevada Test Area (CNTA) is calculated using a newly developed groundwater flow and radionuclide transport model that incorporates aspects of both the original three-dimensional model (Pohlmann et al., 1999) and the two-dimensional model developed for the Faultless data decision analysis (DDA) (Pohll and Mihevc, 2000). This new model includes the uncertainty in the three-dimensional spatial distribution of lithology and hydraulic conductivity from the 1999 model as well as the uncertainty in the other flow and transport parameters from the 2000 DDA model. Additionally, the new model focuses on a much smaller region than was included in the earlier models, that is, the subsurface within the UC-1 land withdrawal area where the 1999 model predicted radionuclide transport will occur over the next 1,000 years. The purpose of this unclassified document is to present the modifications to the CNTA groundwater flow and transport model, to present the methodology used to calculate contaminant boundaries, and to present the Safe Drinking Water Act and risk-derived contaminant boundaries for the Faultless underground nuclear test CAU.

Greg Pohll; Karl Pohlmann; Jeff Daniels; Ahmed Hassan; Jenny Chapman

2003-04-01T23:59:59.000Z

325

Improvements on open and traction boundary conditions for Navier-Stokes time-splitting methods  

Science Conference Proceedings (OSTI)

We present in this paper a numerical scheme for incompressible Navier-Stokes equations with open and traction boundary conditions, in the framework of pressure-correction methods. A new way to enforce this type of boundary condition is proposed and provides ... Keywords: Bifurcated tube, Fractional step methods, Navier-Stokes equations, Open boundary condition, Pressure boundary condition, Pressure-correction methods, Projection methods, Square cylinder, Traction boundary condition

A. Poux; S. Glockner; M. Azaïez

2011-05-01T23:59:59.000Z

326

Incoherent twin boundary migration induced by ion irradiation in Cu  

Science Conference Proceedings (OSTI)

Grain boundaries can act as sinks for radiation-induced point defects. The sink capability is dependent on the atomic structures and varies with the type of point defects. Using high-resolution transmission electron microscopy, we observed that {Sigma}3{l_brace}112{r_brace} incoherent twin boundary (ITB) in Cu films migrates under Cu{sup 3+} ion irradiation. Using atomistic modeling, we found that {Sigma}3{l_brace}112{r_brace} ITB has the preferred sites for adsorbing interstitials and the preferential diffusion channels along the Shockley partial dislocations. Coupling with the high mobility of grain boundary Shockley dislocations within {Sigma}3{l_brace}112{r_brace} ITB, we infer that {Sigma}3{l_brace}112{r_brace} ITB migrates through the collective glide of grain boundary Shockley dislocations, driven by a concurrent reduction in the density of radiation-induced defects, which is demonstrated by the distribution of nearby radiation-induced defects.

Li, N.; Misra, A. [Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Wang, J.; Wang, Y. Q. [Materials Science and Technology Division, MST-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Serruys, Y. [CEA, DEN, Service de Recherches de Metallurgie Physique, Laboratoire JANNUS, F-91191 Gif-sur-Yvette (France); Nastasi, M. [Nebraska Center for Energy Sciences Research, University of Nebraska, Lincoln, Nebraska 68588 (United States)

2013-01-14T23:59:59.000Z

327

Crystallographic Boundary in a Magnetic Shape Memory Material  

NLE Websites -- All DOE Office Websites (Extended Search)

Crystallographic Boundary in a Crystallographic Boundary in a Magnetic Shape Memory Material Crystallographic Boundary in a Magnetic Shape Memory Material Print Wednesday, 18 April 2012 11:37 A research team has shown the existence of a special structural boundary in an intermetallic compound by combining the unique measurement facilities at the ALS, the single-crystal production capabilities of Tohoku University (Japan), and the materials science expertise of Johannes-Gutenberg-University (Germany). Conventional shape memory materials, such as the commercially available Nitinol (an alloy of nickel and titanium used in microsensing, actuation, and medical devices), undergo a phase transformation with cooling or heating when large areas of a sample distort along a single axis, and where the atomic-unit cell "stretching" from a cube to a rectangular prism occurs. In contrast, magnetic shape memory (MSM) materials are much more rare but have an advantage: The axis of magnetic anisotropy is coupled to the direction of stretching, so a perfect MSM crystal can be made to flex and bend reversibly by applying an external magnetic field.

328

Boundary geometric control of a counter-current heat exchanger  

E-Print Network (OSTI)

Boundary geometric control of a counter-current heat exchanger Ahmed MAIDIa , Moussa DIAFb , Jean control of a counter-current heat exchanger whose control is designed considering a model based on two. The objective consists in controlling the internal fluid temperature, at the heat exchanger outlet

329

Hysteresis of a Western Boundary Current Leaping across a Gap  

Science Conference Proceedings (OSTI)

An idealized problem of a western boundary current of Munk thickness LM flowing across a gap in a ridge is considered using a single-layer depth-averaged approach. When the gap (of width 2a) is narrow, a 3.12LM, viscous forces alone restrict ...

Vitalii A. Sheremet

2001-05-01T23:59:59.000Z

330

Absorption of Internal Waves by the Benthic Boundary Layer  

Science Conference Proceedings (OSTI)

The interaction of near-inertial velocities with the benthic boundary layer above a flat bottom is investigated using a diagnostic model and a 3-month time series of velocity from a fixed array of current meters. The observed near-inertial ...

Eric D'Asaro

1982-04-01T23:59:59.000Z

331

An Unstable Elliptic Free Boundary Problem arising in Solid Combustion  

E-Print Network (OSTI)

An Unstable Elliptic Free Boundary Problem arising in Solid Combustion R. Monneau Ecole Nationale in solid combustion. The maximal solution and every local minimizer of the energy are regular, that is, {u combustion, singularity, unstable problem, Aleksandrov reflection, unique blow-up limit, second variation

Monneau, Régis

332

Thermally Indirect Motions in the Convective Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

The energetics of the dry convective boundary layer is studied by partitioning the turbulent heat flux into thermally indirect (w???thermally direct (w???>0) components as a function of z/Zi. It is found that except for the inversion ...

J. M. Wilczak; Joost A. Businger

1983-02-01T23:59:59.000Z

333

PROVISIONAL AGENDA Forum on Modeling the Atmospheric Boundary Layer  

E-Print Network (OSTI)

turbulence, surface layer turbulence, surface heat and moisture representations, heterogenous sub-grid scale-0915 Coordinate System ­ Roger Pielke, Sr., Chair (generalized vertical coordinate, horizontal spatial grid (on your own) 1400-1545 Sub-Grid Scale Fluxes ­ Jon Mercurio, Chair (planetary boundary layer

334

Time Scales of the Trade Wind Boundary Layer Adjustment  

Science Conference Proceedings (OSTI)

The adjustment of the trade wind atmospheric boundary layer to an abrupt sea surface warming is investigated using a large-eddy simulation (LES) and two simple bulk models: a mixed-layer model (MLM), and a model based on the mixing-line hypothesis ...

Gilles Bellon; Bjorn Stevens

2013-04-01T23:59:59.000Z

335

Numerical Simulation of Boundary Layer Variables Using ??? Closure Scheme  

Science Conference Proceedings (OSTI)

In this study, a one-and-a-half-order ??? closure scheme is used to study the planetary boundary layer development over a full diurnal cycle using Wangara 33d-day observations as initial conditions. The simulated results are compared with a first-...

N. Ramanathan; K. Srinivasan; B. V. Seshasayee

1995-02-01T23:59:59.000Z

336

Ceilometer Retrieval of the Boundary Layer Vertical Aerosol Extinction Structure  

Science Conference Proceedings (OSTI)

The CT25K ceilometer is a general-purpose cloud height sensor employing lidar technology for detection of clouds. In this paper it is shown that it can also be used to retrieve aerosol optical properties in the boundary layer. The authors present ...

K. M. Markowicz; P. J. Flatau; A. E. Kardas; J. Remiszewska; K. Stelmaszczyk; L. Woeste

2008-06-01T23:59:59.000Z

337

Kinematic Observations of Misocyclones along Boundaries during IHOP  

Science Conference Proceedings (OSTI)

During the International H2O Project, mobile radars collected high-resolution data of several 0.5–2-km-wide vertically oriented vortices (or misocyclones) along at least five mesoscale airmass boundaries. This study analyzes the properties of the ...

James N. Marquis; Yvette P. Richardson; Joshua M. Wurman

2007-05-01T23:59:59.000Z

338

Consumer sovereignty: New boundaries for telecommunications and broadband access  

Science Conference Proceedings (OSTI)

Antitrust and consumer protection laws share a common purpose to facilitate the exercise of effective consumer choice. This article uses this concept of consumer sovereignty to frame analysis of the shifting boundaries between the industry-specific and ... Keywords: Antitrust, Broadband, Consumer protection, Deregulation, Regulatory policy

Barbara A. Cherry

2010-02-01T23:59:59.000Z

339

Boundary Layer Parameterization for a Non-Gaussian Puff Model  

Science Conference Proceedings (OSTI)

The paper presents two boundary layer parameterizations for a model based on a general technique for solving the K equation using the truncated Gram–Charlier expansion (type A) of the concentration field and a finite set of equations for the ...

T. Tirabassi; U. Rizza

1997-08-01T23:59:59.000Z

340

Dynamics of Transport under Random Fluxes on the Boundary  

E-Print Network (OSTI)

the anomalies as added scalar terms in the heat and transport equations. In most studies, Wiener white noise (non-homogenous Neumann) and with a stochastic term added to the boundary, viz: Wiener white: Wiener white, Wiener colored, L´evy white, and L´evy colored noise. L´evy processes form a more general

Duan, Jinqiao

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Von Kármán's Constant in Atmospheric Boundary Layer Flow: Reevaluated  

Science Conference Proceedings (OSTI)

A field experiment has been carried out with the specific objective in mind to determine the value of von Kármán's constant in atmospheric boundary layer flow, and also to investigate its possible dependence on the surface Rossby number Ro0. Data ...

Ulf Högström

1985-02-01T23:59:59.000Z

342

Investigation of SCC Susceptibility in the Grain Boundary Controlled ...  

Science Conference Proceedings (OSTI)

Crack Growth Rates of Irradiated Commercial Stainless Steels in BWR and PWR ... Detailed Root Cause Analysis of SG Tube ODSCC Indications within the Tube Sheets of NPP Biblis Unit A .... Radiation Damage in Fe-C-Met Model Alloys ... Stress Corrosion Cracking Behavior near the Fusion Boundary of Dissimilar Weld

343

INITIAL BOUNDARY VALUE PROBLEMS FOR A QUASILINEAR PARABOLIC SYSTEM  

E-Print Network (OSTI)

INITIAL BOUNDARY VALUE PROBLEMS FOR A QUASILINEAR PARABOLIC SYSTEM IN THREE-PHASE CAPILLARY FLOW problems for a quasi- linear parabolic system motivated by three-phase ow in porous medium in the presence quasilinear parabolic sys- tems of the form (1.1) u t + f(u) x = (B(u)u x ) x ; 0

344

Coupled Motion of Interstitial-loaded Grain Boundaries in Bcc ...  

Science Conference Proceedings (OSTI)

... Radiation Damage Healing Mechanism under Fusion Reactor Conditions ... Atomic-Scale Modeling of the Mobility of Boundaries of Deformation Twins in Alpha-Iron ... Characterization of Reaction Layers in Mn1.5Co1.5O4 Coated Fuel Cell ...

345

Chaos and “Bursting” in the Planetary Boundary Layer  

Science Conference Proceedings (OSTI)

A theoretical study of the intermittent breakdowns of the planetary boundary layer (PBL) has been carried out using a one-dimensional, “flat” terrain, PBL model of the type originally developed by A.K. Blackadar. It was found that the turbulent ...

Douglas O. ReVelle

1993-07-01T23:59:59.000Z

346

Nonhomogeneos Boundary-Value Problem for Semilinear Hyperbolic Equation. Stability  

Science Conference Proceedings (OSTI)

We discuss the solvability of the nonhomogeneous boundary-value problem for the semilinear equation of the vibrating string x tt (t, ... Keywords: 35L20, Primary 35L05, Secondary 58J45, Wave equations, nonconvex duality, variational method, weak solutions

Andrzej Nowakowski

2008-10-01T23:59:59.000Z

347

Extending boundaries with meta-design and cultures of participation  

Science Conference Proceedings (OSTI)

Human-computer interaction (HCI) has refocused many research efforts within computer science from a technology-centered view to a human-centered view. The developments so far, however, have seen humans mostly as users and consumers rather than as active ... Keywords: boundaries, control, cultures of participation, distances, meta-design, motivation, socio-technical environments, systemic problems

Gerhard Fischer

2010-10-01T23:59:59.000Z

348

A Vertically Averaged Circulation Model Using Boundary-Fitted Coordinates  

Science Conference Proceedings (OSTI)

A two-dimensional vertically averaged circulation model using boundary-fitted coordinates has been developed for predicting sea level and currants in estuarine and shelf waters. The basic idea of the approach is to use a set of coupled quasi-...

Malcolm L. Spaulding

1984-05-01T23:59:59.000Z

349

Velocity and Stress in the Deep-Ocean Boundary Layer  

Science Conference Proceedings (OSTI)

In order to predict the response of deep ocean sediments to the near-bottom currents, accurate estimates of the near-bottom velocity and the boundary shear stress are necessary. Because of the unsteady nature of deep ocean currents, dynamic ...

S. R. McLean; J. Yean

1987-09-01T23:59:59.000Z

350

Influence of Soil Moisture on Boundary Layer Cloud Development  

Science Conference Proceedings (OSTI)

The daytime interaction of the land surface with the atmospheric boundary layer (ABL) is studied using a coupled one-dimensional (column) land surface–ABL model. This is an extension of earlier work that focused on modeling the ABL for 31 May ...

M. B. Ek; A. A. M. Holtslag

2004-02-01T23:59:59.000Z

351

Renewal series and square-root boundaries for Bessel processes  

E-Print Network (OSTI)

We show how a description of Brownian exponential functionals as a renewal series gives access to the law of the hitting time of a square-root boundary by a Bessel process. This extends classical results by Breiman and Shepp, concerning Brownian motion, and recovers by different means, extensions for Bessel processes, obtained independently by Delong and Yor.

Enriquez, Nathanael; Yor, Marc

2008-01-01T23:59:59.000Z

352

Influences on the Height of the Stable Boundary Layer as seen in Large-Eddy Simulations  

DOE Green Energy (OSTI)

Numerical weather prediction (NWP) models and atmospheric dispersion models rely on parameterizations of planetary boundary layer height. In the case of a stable boundary layer, errors in boundary layer height estimation can result in gross errors in boundary-layer evolution and in prediction of turbulent mixing within the boundary layer. We use large-eddy simulations (LES) of moderately stable boundary layers to characterize the effects of various physical processes on stable boundary layers. The stable boundary layer height is assumed to be a function of surface friction velocity, geostrophic wind, Monin-Obukhov length, and the strength of the temperature inversion atop the stable boundary layer. This temperature inversion induces gravity waves with a frequency determined by the strength of the temperature inversion.

Kosovic, B; Lundquist, J K

2004-03-29T23:59:59.000Z

353

Final Report - Plasma Transport at the Magnetospheric Flank Boundary  

SciTech Connect

Progress is highlighted in these areas: 1. Model of magnetic reconnection induced by three-dimensional Kelvin Helmholtz (KH) modes at the magnetospheric flank boundary. 2. Quantitative evaluation of mass transport from the magnetosheath onto closed geomagnetic field for northward IMF. 3. Comparison of mass transfer by cusp reconnection and Flank Kelvin Helmholtz modes. 4. Entropy constraint and plasma transport in the magnetotail - a new mechanism for current sheet thinning. 5. Test particle model for mass transport onto closed geomagnetic field for northward IMF . 6. Influence of density asymmetry and magnetic shear on (a) the linear and nonlinear growth of 3D Kelvin Helmholtz (KH) modes, and (b) three-dimensional KH mediated mass transport. 7. Examination of entropy and plasma transport in the magnetotail. 8. Entropy change and plasma transport by KH mediated reconnection - mixing and heating of plasma. 9. Entropy and plasma transport in the magnetotail - tail reconnection. 10. Wave coupling at the magnetospheric boundary and generation of kinetic Alfven waves.

Otto, Antonius

2012-04-23T23:59:59.000Z

354

Boundary County, Idaho: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Boundary County, Idaho: Energy Resources Boundary County, Idaho: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 48.7987617°, -116.5627065° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":48.7987617,"lon":-116.5627065,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

355

Technoeconomic Boundary Analysis of Biological Pathways to Hydrogen Production  

NLE Websites -- All DOE Office Websites (Extended Search)

60-46674 60-46674 September 2009 Technoeconomic Boundary Analysis of Biological Pathways to Hydrogen Production March 27, 2008 - August 31, 2009 B.D. James, G.N. Baum, J. Perez, and K.N. Baum Directed Technologies, Inc. Arlington, Virginia National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC Contract No. DE-AC36-08-GO28308 Subcontract Report NREL/SR-560-46674 September 2009 Technoeconomic Boundary Analysis of Biological Pathways to Hydrogen Production March 27, 2008 - August 31, 2009 B.D. James, G.N. Baum, J. Perez, and K.N. Baum

356

Warm Bias and Parameterization of Boundary Upwelling in Ocean Models  

SciTech Connect

It has been demonstrated that Eastern Boundary Currents (EBC) are a baroclinic intensification of the interior circulation of the ocean due to the emergence of mesoscale eddies in response to the sharp buoyancy gradients driven by the wind-stress and the thermal surface forcing. The eddies accomplish the heat and salt transport necessary to insure that the subsurface flow is adiabatic, compensating for the heat and salt transport effected by the mean currents. The EBC thus generated occurs on a cross-shore scale of order 20-100 km, and thus this scale needs to be resolved in climate models in order to capture the meridional transport by the EBC. Our result indicate that changes in the near shore currents on the oceanic eastern boundaries are linked not just to local forcing, such as coastal changes in the winds, but depend on the basin-wide circulation as well.

Cessi, Paola; Wolfe, Christopher

2012-11-06T23:59:59.000Z

357

Compressibility Consideration in the Boundary of a Strongly Collapsing Bubble  

E-Print Network (OSTI)

Equations of radial motion of a gas bubble in a compressible viscous liquid have been modified to account for compressibility at the bubble boundary. It has been done by deriving a new bubble boundary equation. This equation has a new term due to liquid compressibility. The influence of this term in the bubble dynamics has been numerically investigated using isothermal-adiabatic model for the gas bubble evolution. The results clearly indicate that at the end of the collapse the new term has very significant role and its consideration dramatically changes the bubble characteristics. The effect of this term is more prominent for the more intense collapses, so that its consideration scales up the maximum values of gas pressure and gas temperature. We have also reasoned that the new bubble behavior will be established even when the effects of mass (water vapor) exchange, chemical reactions, and gas dynamics inside the bubble are taken into account in the model.

Moshaii, A; Taeibi-Rahni, M; Moshaii, Ahmad; Sadighi-Bonabi, Rasool; Taeibi-Rahni, Mohammad

2003-01-01T23:59:59.000Z

358

Modeling biofilm processes using the immersed boundary method  

SciTech Connect

Biofilm processes are of interest to researchers in a variety of fields including bioremediation, oil recovery, waste water treatment, medicine, and dentistry. In this paper we describe how this complex, dynamic, fluid-structure interaction can be modeled successfully using the immersed boundary method. The model presented here includes the coupling of hydrodynamics; substrate reaction, diffusion, and convection; as well as the chemotactic response of swimming microbes. Cell-cell aggregation and cell-substratum adhesion are modeled by generating appropriate binding forces between discrete representations of organisms that may hold them together, or if fluid stresses are large, may yield and release the organisms. In this paper, we show two-dimensional numerical simulations to demonstrate several different types of scenarios that may be modeled using immersed boundary methods. These simulations indicate the variety of different phenomena one might expect in biofilm processes. 24 refs., 8 figs., 2 tabs.

Dillon, R.; Fauci, L. [Tulane Univ., New Orleans, LA (United States); Fogelson, A. [Univ. of Utah, Salt Lake City, UT (United States)] [and others

1996-11-01T23:59:59.000Z

359

On the Boundary Condition Between Two Multiplying Media  

DOE R&D Accomplishments (OSTI)

The transition region between two parts of a pile which have different compositions is investigated. In the case where the moderator is the same in both parts of the pile, it is found that the diffusion constant times thermal neutron density plus diffusion constant times fast neutron density satisfies the usual pile equations everywhere, right to the boundary. More complicated formulae apply in a more general case.

Friedman, F. L.; Wigner, E. P.

1944-04-19T23:59:59.000Z

360

Boundary-Spokane/Colville Valley Support Project : Environmental Assessment.  

SciTech Connect

Systems studies conducted by Bonneville Power Administration indicate a need to reinforce the existing transmission system in the Colville Valley area of Washington. Analysis of several options concluded that the optimal solution for reliability and transmission loss concerns, to serve load growth, and to integrate new power generation projects was to increase transmission voltage capacity between Half Moon Substation and Boundary Substation. The Boundary-Spokane/Colville Valley Support Project is a plan to accomplish this. The project involves rebuilding an existing 91-mile single-circuit 115-kV line between Half Moon Substation and Metaline Falls to double-circuit 230-kV configuration, and adding a single-circuit 230-kV line between Metaline Falls and Boundary Substation, a distance of 9 miles. A route option and a tower design option are being evaluated for selected sections of the proposed route. The proposed action, including route and tower design options, is evaluated in this document. This evaluation includes assessments of the level of environmental impacts and impact ratings, and a comparison of options. In addition, the advantages and disadvantages of the delay/no-action and conservation alternatives are evaluated and compared to the consequences of the proposed action. Alternatives to the proposed action are described. 6 figs., 10 tabs.

United States. Bonneville Power Administration.

1983-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

PERCOLATION ON GRAIN BOUNDARY NETWORKS: APPLICATION TO FISSION GAS RELEASE IN NUCLEAR FUELS  

Science Conference Proceedings (OSTI)

The percolation behavior of grain boundary networks is characterized in two- and three-dimensional lattices with circular macroscale cross-sections that correspond to nuclear fuel elements. The percolation of gas bubbles on grain boundaries, and the subsequent percolation of grain boundary networks is the primary mechanism of fission gas release from nuclear fuels. Both radial cracks and radial gradients in grain boundary property distributions are correlated with the fraction of grain boundaries vented to the free surfaces. Our results show that cracks surprisingly do not significantly increase the percolation of uniform grain boundary networks. However, for networks with radial gradients in boundary properties, the cracks can considerably raise the vented grain boundary content.

Paul C. Millett

2012-02-01T23:59:59.000Z

362

Diffusive-to-ballistic transition in grain boundary motion studied by atomistic simulations  

E-Print Network (OSTI)

An adapted simulation method is used to systematically study grain boundary motion at velocities and driving forces across more than five orders of magnitude. This analysis reveals that grain boundary migration can occur ...

Deng, Chuang

363

Boundary Layer under Near-Inertial Internal Waves over a Critically Sloping Bottom  

Science Conference Proceedings (OSTI)

Internal waves reflecting off sloping bottoms have been shown to have boundary-layer scales proportional to ?½ (? is viscosity). As the characteristic slope of the wave approaches the slope of the bottom, the boundary-layer scale increases ...

R. Lee Gordon

1980-07-01T23:59:59.000Z

364

Determining the Strength of the Deep Western Boundary Current Using the Chlorofluoromethane Ratio  

Science Conference Proceedings (OSTI)

The dilution of a passive tracer during deep water formation and the subsequent advection/mixing in a deep boundary current is modeled with application to chlorofluoromethanes (CFMs) in the North Atlantic. Two different types of boundary currents ...

Robert S. Pickart; Nelson G. Hogg; William M. Smethie Jr.

1989-07-01T23:59:59.000Z

365

Aircraft Observations of Boundary Layer Rolls off the Coast of California  

Science Conference Proceedings (OSTI)

Large-scale horizontal rolls can have a significant influence on turbulent transport across the atmospheric boundary layer. The formation and maintenance of such rolls is dependent on the thermal and dynamic stability of the boundary layer (BL). ...

Ian M. Brooks; David P. Rogers

1997-07-01T23:59:59.000Z

366

On the Mellor–Yamada Turbulence Closure Scheme: The Surface Boundary Condition for q2  

Science Conference Proceedings (OSTI)

A numerical model that uses a level-2½ turbulence closure scheme is used to compare two boundary conditions for the turbulent energy at the air–sea interface. One boundary condition, the most commonly used, sets the turbulent kinetic energy ...

Michael W. Stacey; Stephen Pond

1997-10-01T23:59:59.000Z

367

Boundary conditions, effective action, and Virasoro algebra for AdS?  

E-Print Network (OSTI)

We construct an effective action of General Relativity for small excitations from asymptotic transformations and use it to study conformal symmetry in the boundary of AdS3. By requiring finiteness of the boundary effective ...

Porfyriadis, Achilleas P

2010-01-01T23:59:59.000Z

368

Turbulent Fluxes in the Hurricane Boundary Layer. Part II: Latent Heat Flux  

Science Conference Proceedings (OSTI)

As part of the recent ONR-sponsored Coupled Boundary Layer Air–Sea Transfer (CBLAST) Departmental Research Initiative, an aircraft was instrumented to carry out direct turbulent flux measurements in the high wind boundary layer of a hurricane. ...

William M. Drennan; Jun A. Zhang; Jeffrey R. French; Cyril McCormick; Peter G. Black

2007-04-01T23:59:59.000Z

369

Marine Downscaling of a Future Climate Scenario for Australian Boundary Currents  

Science Conference Proceedings (OSTI)

Ocean boundary currents are poorly represented in existing coupled climate models, partly because of their insufficient resolution to resolve narrow jets. Therefore, there is limited confidence in the simulated response of boundary currents to ...

Chaojiao Sun; Ming Feng; Richard J. Matear; Matthew A. Chamberlain; Peter Craig; Ken R. Ridgway; Andreas Schiller

2012-04-01T23:59:59.000Z

370

An Equatorial Diffusive Boundary Layer and the Equatorial Stacked Jets in Thermally Driven OGCMs  

Science Conference Proceedings (OSTI)

New equatorial boundary layer solutions are found in a reduced-gravity model with large horizontal diffusivity. Analytical and semianalytical solutions are obtained and the structure of the boundary layer is discussed. The equatorial “stacked ...

Ryo Furue

2001-09-01T23:59:59.000Z

371

A cartesian grid embedded boundary method for the heat equation and poisson's equation in three dimensions  

E-Print Network (OSTI)

A Cartesian grid embedded boundary method for the heatA Cartesian Grid Embedded Boundary Method for the HeatError Grid Size Fig. 17. Solution error for heat equation on

Schwartz, Peter; Barad, Michael; Colella, Phillip; Ligocki, Terry

2004-01-01T23:59:59.000Z

372

Observed Boundary Layer Wind Structure and Balance in the Hurricane Core. Part I: Hurricane Georges  

Science Conference Proceedings (OSTI)

The GPS dropsonde allows observations at unprecedentedly high horizontal and vertical resolution, and of very high accuracy, within the tropical cyclone boundary layer. These data are used to document the boundary layer wind field of the core of ...

Jeffrey D. Kepert

2006-09-01T23:59:59.000Z

373

A Parameter Study of Interactions Between Convective Clouds, the Convective Boundary Layer, and a Forested Surface  

Science Conference Proceedings (OSTI)

A numerical model was developed which included cloud parameterizations, a convective boundary layer, solar and longwave radiation, a soil layer and a parameterized forest layer. The model simulated the growth of the convective boundary layer and ...

Alfred J. Garrett

1982-08-01T23:59:59.000Z

374

Potential Vorticity Dynamics of Boundary Currents in a Quasi-geostrophic Ocean  

Science Conference Proceedings (OSTI)

Boundary layer potential vorticity dynamics for a quasi-geostrophic, eddy-resolving general circulation ocean model are studied using both Lagrangian and Eulerian analyses. Active western boundary layers are found not only in the upper wind-...

M. Susan Lozier; Stephen C. Riser

1989-09-01T23:59:59.000Z

375

The Shallow and Deep Western Boundary Circulation of the South Atlantic at 5°–11°S  

Science Conference Proceedings (OSTI)

Repeated shipboard observation sections across the boundary flow off northeastern Brazil as well as acoustic Doppler current profiler (ADCP) and current-meter records from a moored boundary array deployed during 2000–04 near 11°S are analyzed ...

Friedrich A. Schott; Marcus Dengler; Rainer Zantopp; Lothar Stramma; Jürgen Fischer; Peter Brandt

2005-11-01T23:59:59.000Z

376

Convection Initiation along Soil Moisture Boundaries in the Southern Great Plains  

Science Conference Proceedings (OSTI)

Boundaries between two dissimilar air masses have been shown to be the focus region for convection initiation. One feature that has been shown to create these boundaries, as well as mesoscale circulation patterns conducive for convection, is soil ...

John D. Frye; Thomas L. Mote

2010-04-01T23:59:59.000Z

377

DISCRETE TRANSPARENT BOUNDARY CONDITIONS FOR WIDE ANGLE PARABOLIC EQUATIONS IN UNDERWATER  

E-Print Network (OSTI)

DISCRETE TRANSPARENT BOUNDARY CONDITIONS FOR WIDE ANGLE PARABOLIC EQUATIONS IN UNDERWATER ACOUSTICS "parabolic" equations (WAPEs) in underwater acoustics (assuming cylindrical symmetry). Existing the discretization of transparent bottom boundary conditions. In oceanography one wants to calculate the underwater

Ehrhardt, Matthias

378

Comparisons between Model Forecast and Observed Boundary Layer Profiles and Related Comments on Cloud Prediction  

Science Conference Proceedings (OSTI)

In this study comparisons are made between Met Office mesoscale model boundary layer profiles, and radiosonde data collected in the central United Kingdom during three intensive boundary layer cloud experiments. Significant differences between ...

J. D. Price; M. R. Bush

2004-12-01T23:59:59.000Z

379

Eddy-Driven Buoyancy Gradients on Eastern Boundaries and Their Role in the Thermocline  

Science Conference Proceedings (OSTI)

It is demonstrated that eddy fluxes of buoyancy at the eastern and western boundaries maintain alongshore buoyancy gradients along the coast. Eddy fluxes arise near the eastern and western boundaries because on both coasts buoyancy gradients ...

Paola Cessi; Christopher L. Wolfe

2009-07-01T23:59:59.000Z

380

Mesoscale Boundary Layer Evolution over Complex Terrain. Part I. Numerical Simulation of the Diurnal Cycle  

Science Conference Proceedings (OSTI)

The continuous development of a meso-?-scale boundary layer over sloping terrain upwind of a high mountain barrier was simulated through a complete diurnal cycle using a nonhydrostatic boundary-layer model. The simulation detailed the evolution ...

David C. Bader; Thomas B. McKee; Gregory J. Tripoli

1987-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Circulation and Transport in the Western Boundary Currents at Cape Farewell, Greenland  

Science Conference Proceedings (OSTI)

The circulation and volume transports in the western boundary currents around Cape Farewell, Greenland, are derived from full-depth hydrographic and velocity measurements from August–September 2005. The western boundary currents from surface to ...

N. P. Holliday; S. Bacon; J. Allen; E. L. McDonagh

2009-08-01T23:59:59.000Z

382

Quasi-Steady Symmetric Regimes of a Rotating Annulus Differentially Heated on the Horizontal Boundaries  

Science Conference Proceedings (OSTI)

The symmetric flows in a rotating annulus with its horizontal boundaries maintained at temperatures as linear functions of radial distance r and with its vertical boundaries thermally insulated are studied analytically and numerically for ...

Charles Quon

1980-11-01T23:59:59.000Z

383

The Structure of Turbulence in the Near-neutral Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

In this paper, the idea of local similarity, previously used to study turbulence in the stably stratified boundary layer, is used to investigate the structure of turbulence in the neutral atmospheric boundary layer and to relate this structure to ...

A. L. M. Grant

1992-02-01T23:59:59.000Z

384

Modeling the Effects of the Spatially Varying Sea Surface Temperature on the Marine Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

A two-dimensional marine planetary boundary layer model is developed and applied to simulate the evolution of coupled dynamic, thermodynamic and cloud properties of the marine boundary layer over a zonally varying sea surface temperature field. ...

Mickey Man-Kui Wai

1988-01-01T23:59:59.000Z

385

Boundary-Layer Transition across a Stratocumulus Cloud Edge in a Coastal Zone  

Science Conference Proceedings (OSTI)

We examine the lateral transition from a stratocumulus-covered boundary layer to a clear-sky convective boundary layer during onshore flow in a coastal environment, using both mobile sodar observations and a numerical model. During four ...

C. E. Skupniewicz; J. W. Glendening; R. F. Kamada

1991-10-01T23:59:59.000Z

386

Convective Boundary Layer Height Measurement with Wind Profilers and Comparison to Cloud Base  

Science Conference Proceedings (OSTI)

The depth of the atmospheric boundary layer is of interest in several different areas, such as chemistry, pollutant studies, and global modeling. In this research the authors describe and compare several different measurements of boundary layer ...

Alison W. Grimsdell; Wayne M. Angevine

1998-12-01T23:59:59.000Z

387

A Method for Coupling a Parameterization of the Planetary Boundary Layer with a Hydrologic Model  

Science Conference Proceedings (OSTI)

Deardorff's parameterization of the planetary boundary layer is adapted to drive a hydrologic model. The method converts the atmospheric conditions measured at the anemometer height at one site to the mean values in the planetary boundary layer ...

J. D. Lin; Shu Fen Sun

1986-12-01T23:59:59.000Z

388

Simulation of Atmospheric Boundary Layer Processes Using Local- and Nonlocal-Closure Schemes  

Science Conference Proceedings (OSTI)

A soil–vegetation–atmospheric boundary layer model was developed to study the performance of two local-closure and two nonlocal-closure boundary layer mixing schemes for use in meteorological and air quality simulation models. Full interaction ...

Kiran Alapaty; Jonathan E. Pleim; Sethu Raman; Devdutta S. Niyogi; Daewon W. Byun

1997-03-01T23:59:59.000Z

389

Spatial Variability of Atmospheric Boundary Layer Structure over the Eastern Equatorial Pacific  

Science Conference Proceedings (OSTI)

Variations in the atmospheric boundary layer structure over the eastern equatorial Pacific are analyzed using 916 soundings collected during the First Global Atmospheric Research Program Global Experiment. Unstable boundary layer structures are ...

Bingfan Yin; Bruce A. Albrecht

2000-05-01T23:59:59.000Z

390

Large-Eddy Simulation of a Stratus-Topped Boundary Layer. Part I: Structure and Budgets  

Science Conference Proceedings (OSTI)

The structure of a stratus-topped boundary layer is observed through large-eddy simulation which includes the interaction of longwave radiation and turbulence processes. This simulated boundary layer has a relatively warm and dry overlying ...

Chin-Hoh Moeng

1986-12-01T23:59:59.000Z

391

Use of Synthetic Data to Test Flight Patterns for a Boundary Layer Field Experiment  

Science Conference Proceedings (OSTI)

A virtual research aircraft was flown through a synthetic atmospheric boundary layer to help design a real flight plan that would allow robust turbulence statistics to be obtained in a heterogeneous, evolving, convective boundary layer. The ...

Edi Santoso; Roland Stull

1999-09-01T23:59:59.000Z

392

Turbulence Structure of the Hurricane Boundary Layer between the Outer Rainbands  

Science Conference Proceedings (OSTI)

As part of the Coupled Boundary Layers Air–Sea Transfer (CBLAST)-Hurricane program, flights were conducted to directly measure turbulent fluxes and turbulence properties in the high-wind boundary layer of hurricanes between the outer rainbands. ...

Jun A. Zhang; William M. Drennan; Peter G. Black; Jeffrey R. French

2009-08-01T23:59:59.000Z

393

Derivation of Turbulent Kinetic Energy from a First-Order Nonlocal Planetary Boundary Layer Parameterization  

Science Conference Proceedings (OSTI)

Turbulent kinetic energy (TKE) is derived from a first-order planetary boundary layer (PBL) parameterization for convective boundary layers: the nonlocal K-profile Yonsei University (YSU) PBL. A parameterization for the TKE equation is developed ...

Hyeyum Hailey Shin; Song-You Hong; Yign Noh; Jimy Dudhia

2013-06-01T23:59:59.000Z

394

A Case Study of the Morning Evolution of the Convective Boundary Layer Depth  

Science Conference Proceedings (OSTI)

Because of the importance of the convective boundary layer depth (CBLD) in determining pollutant concentrations near the surface, a study of the morning evolution of the convective boundary layer was carried out at the Central Nuclear de Almaraz, ...

José A. Garc; Mar L. Cancillo; José L. Cano

2002-10-01T23:59:59.000Z

395

A Simple Model for Deep Equatorial Zonal Currents Forced at Lateral Boundaries  

Science Conference Proceedings (OSTI)

Deep lateral boundary processes (e.g., western boundary currents) are hypothesized as an alternative energy source exciting the equatorial wave guide at long time scales. A linear, continuously stratified model is used to study the equatorial ...

Rui M. Ponte

1989-12-01T23:59:59.000Z

396

An evaluation of grain boundary engineering technology and processing scale-up  

E-Print Network (OSTI)

Grain boundary engineering is the manipulation of low stacking-fault energy, face- centered cubic material microstructures to break the connectivity of the general grain boundary network through the addition of special ...

Zelinski, Jeffrey A

2005-01-01T23:59:59.000Z

397

Conserved Variable Analysis of the Convective Boundary Layer Thermodynamic Structure over the Tropical Oceans  

Science Conference Proceedings (OSTI)

An analysis of FGGE dropwindsonde data using conserved thermodynamic variables shows mixing line structures for the convective boundary layer over the equatorial Pacific. Deeper boundary layers show a double structure. Reversals of the gradients ...

Alan K. Betts; Bruce A. Albrecht

1987-01-01T23:59:59.000Z

398

Boundary Ring: a way to construct approximate NG solutions with polygon boundary conditions: I. Z_n-symmetric configurations  

E-Print Network (OSTI)

We describe an algebro-geometric construction of polygon-bounded minimal surfaces in ADS_5, based on consideration of what we call the "boundary ring" of polynomials. The first non-trivial example of the Nambu-Goto (NG) solutions for Z_6-symmetric hexagon is considered in some detail. Solutions are represented as power series, of which only the first terms are evaluated. The NG equations leave a number of free parameters (a free function). Boundary conditions, which fix the free parameters, are imposed on truncated series. It is still unclear if explicit analytic formulas can be found in this way, but even approximate solutions, obtained by truncation of power series, can be sufficient to investigate the Alday-Maldacena -- BDS/BHT version of the string/gauge duality.

H. Itoyama; A. Mironov; A. Morozov

2007-12-02T23:59:59.000Z

399

Achieving safety: a field study of boundary objects in aircraft technical support  

Science Conference Proceedings (OSTI)

Boundary objects are a critical, but understudied, theoretical construct in CSCW. Through a field study of aircraft technical support, we examined the role of boundary objects in the "achievement of safety" by service engineers. The resolution process ... Keywords: boundary objects, collaborative work, high reliability organizations, hotlines, information reuse, organizational memory, safety, service engineering, technical support

Wayne G. Lutters; Mark S. Ackerman

2002-11-01T23:59:59.000Z

400

Fictitious boundary and moving mesh methods for the numerical simulation of rigid particulate flows  

Science Conference Proceedings (OSTI)

In this paper, we investigate the numerical simulation of particulate flows using a new moving mesh method combined with the multigrid fictitious boundary method (FBM) [S. Turek, D.C. Wan, L.S. Rivkind, The fictitious boundary method for the implicit ... Keywords: ALE, FEM, Fictitious boundary, Moving mesh, Multigrid, Particulate flows

Decheng Wan; Stefan Turek

2007-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Dielectric Boundary Force in Molecular Solvation with the PoissonBoltzmann Free Energy: A Shape  

E-Print Network (OSTI)

Dielectric Boundary Force in Molecular Solvation with the Poisson­Boltzmann Free Energy: A Shape boundary force acting on such a boundary is the negative first variation of the elec- trostatic free energy [17,18,35,43,44]. Such a predefined interface is used to compute the solvation free energy as the sum

Li, Bo

402

Relative grain boundary area and energy distributions in nickel Jia Li, Shen J. Dillon 1  

E-Print Network (OSTI)

Relative grain boundary area and energy distributions in nickel Jia Li, Shen J. Dillon 1 , Gregory crystallographic parameters, a quantity that will be referred to as the grain boundary energy distribution (GBED­20]. The first comprehensive measurement of the grain boundary energy distribution was carried out for Mg

Rohrer, Gregory S.

403

Grain boundary structure and solute segregation in titanium-doped sapphire bicrystals  

SciTech Connect

Solute segregation to ceramic grain boundaries governs material processing and microstructure evolution, and can strongly influence material properties critical to engineering performance. Understanding the evolution and implications of grain boundary chemistry is a vital component in the greater effort to engineer ceramics with controlled microstructures. This study examines solute segregation to engineered grain boundaries in titanium-doped sapphire (Al2O3) bicrystals, and explores relationships between grain boundary structure and chemistry at the nanometer scale using spectroscopic and imaging techniques in the transmission electron microscope (TEM). Results demonstrate dramatic changes in solute segregation stemming from small fluctuations in grain boundary plane and structure. Titanium and silicon solute species exhibit strong tendencies to segregate to non-basal and basal grain boundary planes, respectively. Evidence suggests that grain boundary faceting occurs in low-angle twis t boundaries to accommodate nonequilibrium solute segregation related to slow specimen cooling rates, while faceting of tilt grain boundaries often occurs to expose special planes of the coincidence site lattice (CSL). Moreover, quantitative analysis of grain boundary chemistry indicates preferential segregation of charged defects to grain boundary dislocations. These results offer direct proof that static dislocations in ionic materials can assume a net charge, and emphasize the importance of interactions between charged point, line, and planar defects in ionic materials. Efforts to understand grain boundary chemistry in terms of space charge theory, elastic misfit and nonequilibrium segregation are discussed for the Al2O3 system.

Taylor, Seth T.

2002-05-17T23:59:59.000Z

404

Control of the ocean circulation by boundaries and topography P.B. Rhines  

E-Print Network (OSTI)

generation is usually by viscosity and turbulence at a fluid boundary. In this way, fine-scale dynamics can. Kinetic energy generates enstrophy at a western ocean boundary and destroys it at an eastern boundary enstrophy is small-scale energy its generation represents a cascade of energy toward small scale, counter

405

Free Boundary, High Beta Equilibrium in a Large Aspect Ratio Tokamak with Nearly  

E-Print Network (OSTI)

Free Boundary, High Beta Equilibrium in a Large Aspect Ratio Tokamak with Nearly Circular Plasma Boundary H. Qin A. Reiman September 25, 1996 Abstract An analytic solution is obtained for free. In the absence of surface currents at the plasma-vacuum in- terface, the free-boundary equilibrium solution

406

Free Boundary, High Beta Equilibrium in a Large Aspect Ratio Tokamak with Nearly  

E-Print Network (OSTI)

Free Boundary, High Beta Equilibrium in a Large Aspect Ratio Tokamak with Nearly Circular Plasma Boundary H. Qin A. Reiman September 25, 1996 Abstract An analytic solution is obtained for free. In the absence of surface currents at the plasma­vacuum in­ terface, the free­boundary equilibrium solution

407

Preprint of the paper "A Boundary Element Formulation for the Substation Grounding Design"  

E-Print Network (OSTI)

Preprint of the paper "A Boundary Element Formulation for the Substation Grounding Design" I://caminos.udc.es/gmni #12;A BOUNDARY ELEMENT FORMULATION FOR THE SUBSTATION GROUNDING DESIGN I. Colominas, F. Navarrina A Boundary Element approach for the numerical computation of substation grounding systems is pre- sented

Colominas, Ignasi

408

feltz-99.PDF  

NLE Websites -- All DOE Office Websites (Extended Search)

+ GOES Retrievals at the SGP ARM Site: SCM Data + GOES Retrievals at the SGP ARM Site: SCM Data Assimilation and Convective Forecasting Utility W. F. Feltz, R. O. Knuteson, H. E. Revercomb, and H. B. Howell University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies Madison, Wisconsin Introduction Four additional Atmospheric Emitted Radiance Interferometer (AERI) systems have been deployed at the U.S. Department of Energy's (DOE's) Atmospheric Radiation Measurement (ARM) Southern Great Plains Cloud And Radiation Testbed (SGP CART) site boundary facilities. The AERI + GOES (Geostationary Operational Environmental Satellite) temperature and water vapor retrieval product is now operational at Pacific Northwest National Laboratory (PNNL) allowing continuous monitoring of

409

Essential Boundary Conditions with Straight C1 Finite Elements in Curved Domains  

SciTech Connect

The implementation of essential boundary conditions in C1 finite element analysis requires proper treatment of both the boundary conditions on second-order differentials of the solution and the curvature of the domain boundary. A method for the imposition of essential boundary conditions using straight elements (where the elements are not deformed to approximate a curved domain) is described. It is shown that pre-multiplication of the matrix equation by the local rotation matrix at each boundary node is not the optimal transformation. The uniquely optimal transformation is found, which does not take the form of a similarity transformation due to the non-orthogonality of the transformation to curved coordinates.

N.M. Ferraro, S.C. Jardin, X. Luo

2010-02-19T23:59:59.000Z

410

Orion Mark Graf University of Kansas, Lawrence, KS 2010-Present  

E-Print Network (OSTI)

Distributions, Origins, and their Association with Y-chromosome Markers in the Aleutian Archipelago Advisor) "Surname Distributions and their Association with Y-chromosome Markers in the Aleutian Islands" Human in the Aleutian Archipelago: Evidence from Y- chromosome markers and historical accounts" Poster presentation

Peterson, Blake R.

411

Fractional extensions of some boundary value problems in oil strata  

E-Print Network (OSTI)

In the present paper, we solve three boundary value problems related to the temperature field in oil strata -- the fractional extensions of the incomplete lumped formulation and lumped formulation in the linear case and the fractional generalization of the incomplete lumped formulation in the radial case. By using the Caputo differintegral operator and the Laplace transform, the solutions are obtained in integral forms where the integrand is expressed in terms of the convolution of some auxiliary functions of Wright function type. A generalization of the Laplace transform convolution theorem, known as Efros' theorem is widely used.

Garg, Mridula

2007-01-01T23:59:59.000Z

412

Spin connection and boundary states in a topological insulator  

E-Print Network (OSTI)

We study the surface resistivity of a three-dimensional topological insulator when the boundaries exhibit a non trivial curvature. We obtain an analytical solution for a spherical topological insulator, and we show that a non trivial quantum spin connection emerges from the three dimensional band structure. We analyze the effect of the spin connection on the scattering by a bump on a flat surface. Quantum effects induced by the geometry lead to resonances when the electron wavelength is comparable to the size of the bump.

V. Parente; P. Lucignano; P. Vitale; A. Tagliacozzo; F. Guinea

2010-11-02T23:59:59.000Z

413

Low Cost Geothermal Separators BLISS Boundary Layer Inline Separator Scrubber  

DOE Green Energy (OSTI)

A new compact, low cost, and high performance separator is being developed to help reduce the installed and O and M cost of geothermal power generation. This device has been given the acronym ''BLISS'' that stands for ''Boundary Layer Inline Separator Scrubber''. The device is the first of a series of separators, and in the case of injectates, scrubbers to address the cost-reduction needs of the industry. The BLISS is a multi-positional centrifugal separator primarily designed to be simply installed between pipe supports, in a horizontal position. This lower profile reduces the height safety concern for workers, and significantly reduces the total installation cost. The vessel can demand as little as one-quarter (25%) the amount of steel traditionally required to fabricate many large vertical separators. The compact nature and high separating efficiency of this device are directly attributable to a high centrifugal force coupled with boundary layer control. The pseudo isokinetic flow design imparts a self-cleaning and scale resistant feature. This polishing separator is designed to remove moderate amounts of liquid and entrained solids.

Jung, Douglas; Wai, King

2000-05-26T23:59:59.000Z

414

Boundary conditions for NLTE polarized radiative transfer with incident radiation  

E-Print Network (OSTI)

Polarized NLTE radiative transfer in the presence of scattering in spectral lines and/or in continua may be cast in a so-called reduced form for six reduced components of the radiation field. In this formalism the six components of the reduced source function are angle-independent quantities. It thus reduces drastically the storage requirement of numerical codes. This approach encounters a fundamental problem when the medium is illuminated by a polarized incident radiation, because there is a priori no way of relating the known (and measurable) Stokes parameters of the incident radiation to boundary conditions for the reduced equations. The origin of this problem is that there is no unique way of deriving the radiation reduced components from its Stokes parameters (only the inverse operation is clearly defined). The method proposed here aims at enabling to work with arbitrary incident radiation field (polarized or unpolarized). In previous works an ad-hoc treatment of the boundary conditions, applying to case...

Faurobert, Marianne; Atanackovic, Olga

2013-01-01T23:59:59.000Z

415

Boundary layer structure over areas of heterogeneous heat fluxes  

SciTech Connect

In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations within the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moveover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discuses some initial findings from those campaigns.

Doran, J.C. (Pacific Northwest Lab., Richland, WA (United States)); Barnes, F.J. (Los Alamos National Lab., NM (United States)); Coulter, R.L. (Argonne National Lab., IL (United States)); Crawford, T.L. (National Oceanic and Atmospheric Administration, Oak Ridge, TN (United States). Air Resources Lab. Atmospheric Turbulence and Diffusion Div.)

1993-01-01T23:59:59.000Z

416

Boundary layer structure over areas of heterogeneous heat fluxes  

SciTech Connect

In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moreover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations? To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discusses some initial findings from those campaigns.

Doran, J.C. [Pacific Northwest Lab., Richland, WA (United States); Barnes, F.J. [Los Alamos National Lab., NM (United States); Coulter, R.L. [Argonne National Lab., IL (United States); Crawford, T.L. [National Oceanic and Atmospheric Administration, Oak Ridge, TN (United States). Air Resources Lab. Atmospheric Turbulence and Diffusion Div.

1993-01-01T23:59:59.000Z

417

Boundary layer structure over areas of heterogeneous heat fluxes  

SciTech Connect

In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations within the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moveover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations? To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discuses some initial findings from those campaigns.

Doran, J.C. [Pacific Northwest Lab., Richland, WA (United States); Barnes, F.J. [Los Alamos National Lab., NM (United States); Coulter, R.L. [Argonne National Lab., IL (United States); Crawford, T.L. [National Oceanic and Atmospheric Administration, Oak Ridge, TN (United States). Air Resources Lab. Atmospheric Turbulence and Diffusion Div.

1993-04-01T23:59:59.000Z

418

Boundary layer structure over areas of heterogeneous heat fluxes  

SciTech Connect

In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moreover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discusses some initial findings from those campaigns.

Doran, J.C. (Pacific Northwest Lab., Richland, WA (United States)); Barnes, F.J. (Los Alamos National Lab., NM (United States)); Coulter, R.L. (Argonne National Lab., IL (United States)); Crawford, T.L. (National Oceanic and Atmospheric Administration, Oak Ridge, TN (United States). Air Resources Lab. Atmospheric Turbulence and Diffusion Div.)

1993-01-01T23:59:59.000Z

419

Fluorescence photon migration by the boundary element method  

Science Conference Proceedings (OSTI)

The use of the boundary element method (BEM) is explored as an alternative to the finite element method (FEM) solution methodology for the elliptic equations used to model the generation and transport of fluorescent light in highly scattering media, without the need for an internal volume mesh. The method is appropriate for domains where it is reasonable to assume the fluorescent properties are regionally homogeneous, such as when using highly specific molecularly targeted fluorescent contrast agents in biological tissues. In comparison to analytical results on a homogeneous sphere, BEM predictions of complex emission fluence are shown to be more accurate and stable than those of the FEM. Emission fluence predictions made with the BEM using a 708-node mesh, with roughly double the inter-node spacing of boundary nodes as in a 6956-node FEM mesh, match experimental frequency-domain fluorescence emission measurements acquired on a 1087 cm{sup 3} breast-mimicking phantom at least as well as those of the FEM, but require only 1/8 to 1/2 the computation time.

Fedele, Francesco [Department of Civil and Environmental Engineering, University of Vermont, Burlington, VT 05405 (United States); Eppstein, Margaret J. [Department of Computer Science, University of Vermont, Burlington, VT 05405 (United States)]. E-mail: maggie.eppstein@uvm.edu; Laible, Jeffrey P. [Department of Civil and Environmental Engineering, University of Vermont, Burlington, VT 05405 (United States); Godavarty, Anuradha [Photon Migration Laboratories, Department of Chemistry, Texas A and M University, College Station, TX 77842-3012 (United States); Sevick-Muraca, Eva M. [Photon Migration Laboratories, Department of Chemistry, Texas A and M University, College Station, TX 77842-3012 (United States)

2005-11-20T23:59:59.000Z

420

Optimized boundary driven flows for dynamos in a sphere  

SciTech Connect

We perform numerical optimization of the axisymmetric flows in a sphere to minimize the critical magnetic Reynolds number Rm{sub cr} required for dynamo onset. The optimization is done for the class of laminar incompressible flows of von Karman type satisfying the steady-state Navier-Stokes equation. Such flows are determined by equatorially antisymmetric profiles of driving azimuthal (toroidal) velocity specified at the spherical boundary. The model is relevant to the Madison plasma dynamo experiment, whose spherical boundary is capable of differential driving of plasma in the azimuthal direction. We show that the dynamo onset in this system depends strongly on details of the driving velocity profile and the fluid Reynolds number Re. It is found that the overall lowest Rm{sub cr} Almost-Equal-To 200 is achieved at Re Almost-Equal-To 240 for the flow, which is hydrodynamically marginally stable. We also show that the optimized flows can sustain dynamos only in the range Rm{sub cr}

Khalzov, I. V.; Brown, B. P.; Cooper, C. M.; Weisberg, D. B.; Forest, C. B. [Center for Magnetic Self Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706 (United States)

2012-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Evaluation of the NCEP Global Forecast System at the ARM SGP Site  

Science Conference Proceedings (OSTI)

This study evaluates the performance of the National Centers for Environmental Prediction Global Forecast System (GFS) against observations made by the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Program at the southern ...

Fanglin Yang; Hua-Lu Pan; Steven K. Krueger; Shrinivas Moorthi; Stephen J. Lord

2006-12-01T23:59:59.000Z

422

LandUse/Land Cover Map of the CF of ARM in the SGP Site Using...  

NLE Websites -- All DOE Office Websites (Extended Search)

the effects and interactions of sunlight, radiant energy, and clouds on temperatures, weather, and climate. (http:www.arm.govdocsabout.html) This energy balance is affected by...

423

Spatiotemporal Variations in Soil Water: First Results from the ARM SGP CART Network  

Science Conference Proceedings (OSTI)

A network of automated soil water and temperature systems, installed at 21 locations in Oklahoma and Kansas in 1996 and 1997, is providing hourly profiles of soil temperature and water at eight depths, from 0.05 to 1.75 m below the surface, in ...

J. M. Schneider; D. K. Fisher; R. L. Elliott; G. O. Brown; C. P. Bahrmann

2003-02-01T23:59:59.000Z

424

Atmospheric Radiation Measurement (ARM) Data from the Southern Great Plains (SGP) Site  

DOE Data Explorer (OSTI)

The Office of Biological and Environmental Research in DOE's Office of Science is responsible for the ARM Program. The ARM Archive physically resides at the Oak Ridge National Laboratory. (Specialized Interface) (Registration Required)

425

A Comparison of MERRA and NARR Reanalyses with the DOE ARM SGP Data  

Science Conference Proceedings (OSTI)

Atmospheric states from the Modern-Era Retrospective analysis for Research and Applications (MERRA) and the North American Regional Reanalysis (NARR) are compared with data from the Atmospheric Radiation Measurement Program (ARM) Southern Great ...

Aaron D. Kennedy; Xiquan Dong; Baike Xi; Shaocheng Xie; Yunyan Zhang; Junye Chen

2011-09-01T23:59:59.000Z

426

Temporal Variability of Fair-Weather Cumulus Statistics at the ACRF SGP Site  

Science Conference Proceedings (OSTI)

Continental fair-weather cumuli exhibit significant diurnal, day-to-day, and year-to-year variability. This study describes the climatology of cloud macroscale properties, over the U.S. Department of Energy’s Atmospheric Radiation Measurement (...

Larry K. Berg; Evgueni I. Kassianov

2008-07-01T23:59:59.000Z

427

Evaluating Mesoscale Model Predictions of Clouds and Radiation with SGP ARM Data over a Seasonal Timescale  

Science Conference Proceedings (OSTI)

This study evaluates the predictions of radiative and cloud-related processes of the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5). It is based on extensive comparison of ...

Françoise Guichard; David B. Parsons; Jimy Dudhia; James Bresch

2003-05-01T23:59:59.000Z

428

Preliminary Analysis of ARM SGP Area Sky Cover and Downwelling SW Irradiance  

NLE Websites -- All DOE Office Websites (Extended Search)

Clarifying and Implementing a Stricter DOD Definition Across Datastreams Clarifying and Implementing a Stricter DOD Definition Across Datastreams C. Sivaraman, B. Ermold, M. Macduff Pacific Northwest National Laboratory Definition of DOD: All dimension, attribute and variable types and names are considered part of a DOD. A change in any part of the DOD is considered a version change. Outcomes: ACRF enforces greater consistency in data Downstream users benefit (DQ, VAPs, scientists) Identify inconsistencies across datastreams Datastream development is more efficient BODS interface, updated libraries Improved data analysis tools for ACRF and ARM Visual Datastream history tool (below) Issues with current DOD history: The DOD History page: http://science.arm.gov/tool/dod/showdod.php * Tracks both content and structure. * Needs Custom Configuration

429

ARM: ARSCL: cloud boundaries from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR  

DOE Data Explorer (OSTI)

ARSCL: cloud boundaries from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR

Richard Coulter; Kevin Widener; Nitin Bharadwaj; Karen Johnson; Timothy Martin

430

An Embedded Boundary Method for the Modelling of Unsteady . . .  

E-Print Network (OSTI)

A new methodology for the modeling of unsteady, nonpremixed, axisymmetric reacting flow in industrial furnaces is presented. The method is an extension of previous work by the authors to complex geometries, multistep kinetics mechanisms, and realistic properties, especially thermochemical data. The walls of the furnace are represented as an embedded boundary in a uniform, rectangular grid. The grid then consists of uniform rectangular cells except at the furnace wall where irregular (mixed) cells may be present. We use finite volume differencing techniques for the convective, viscous, and radiative heat transport terms in the mixed cells, while a finite element-based technique is used to solve the elliptic equation arising from the low-Mach number formulation. Results from the simulation of an experimental natural gas-fired furnace are shown.

Richard B. Pember; Ann S. Almgren; William Y. Crutchfield; Louis H. Howell; John B. Bell; Phillip Colella; Vincent E. Beckner

1995-01-01T23:59:59.000Z

431

Knowledge Recombination across Technological Boundaries: Scientists versus Engineers  

E-Print Network (OSTI)

Building on the seminal work of Allen (1977), we contribute to the emerging micro-level theory of knowledge recombination by examining how individual-level characteristics of inventors affect the breadth of their technological recombinations. Our data set combines information from 30,550 European patents with matched survey data obtained from 1,880 inventors. The analysis supports the view that inventors with a scientific education are more likely to generate patents that span technological boundaries (in our case, 30 broad, top-level technological domains) than inventors with an engineering degree. A doctoral degree is associated with increased recombination breadth for all groups of inventors. The breadth of an inventor’s technological recombinations diminishes with increasing temporal distance to his education, but the differences between scientists and engineers persist over time. Our findings provide several new insights for research on inventors, the literature on organizational learning and innovation, and for strategy research.

Marc Gruber; Dietmar Harhoff; Karin Hoisl

2012-01-01T23:59:59.000Z

432

Case study of Frontal Boundary Study Mission 03  

SciTech Connect

The Frontal Boundary Study was conducted by the Pacific Northwest Laboratory (PNL) for the US Department of Energy in October and November 1989 in central Ohio. This report, which was prepared for the US Environmental Protection Agency, presents the results of the aircraft and surface observations made for one precipitation event during the study, on October 10, 1989. This particular event was selected because of its relatively simple meteorological setting. PNL`s Gulfstream (G-1) aircraft was used to sample trace gas concentrations aloft in the inflow region of the precipitation system. Precipitation chemistry and rainfall rate data are presented for the October 10, 1989, event from the network of surface precipitation samplers. Trace gas concentrations and other meteorological variables measured with the G-1 during flight 03 on this date are included. Meteorological observations obtained with radiosondes and radar are also presented. These data sets can be used to evaluate air quality and wet deposition models.

Barchet, W.R.; Dana, M.T.; Thorp, J.M.

1992-09-01T23:59:59.000Z

433

Case study of Frontal Boundary Study Mission 03  

Science Conference Proceedings (OSTI)

The Frontal Boundary Study was conducted by the Pacific Northwest Laboratory (PNL) for the US Department of Energy in October and November 1989 in central Ohio. This report, which was prepared for the US Environmental Protection Agency, presents the results of the aircraft and surface observations made for one precipitation event during the study, on October 10, 1989. This particular event was selected because of its relatively simple meteorological setting. PNL's Gulfstream (G-1) aircraft was used to sample trace gas concentrations aloft in the inflow region of the precipitation system. Precipitation chemistry and rainfall rate data are presented for the October 10, 1989, event from the network of surface precipitation samplers. Trace gas concentrations and other meteorological variables measured with the G-1 during flight 03 on this date are included. Meteorological observations obtained with radiosondes and radar are also presented. These data sets can be used to evaluate air quality and wet deposition models.

Barchet, W.R.; Dana, M.T.; Thorp, J.M.

1992-09-01T23:59:59.000Z

434

AB INITIO STUDY OF GRAIN BOUNDARY PROPERTIES OF TUNGSTEN ALLOYS  

SciTech Connect

Density functional theory was employed to investigate the grain boundary (GB) property of W-TM alloys (TM: fifth and sixth row transition metals). GB strengthening was found for Hf, Ta, Nb, Ru, Re, Os and Ir for 27{l_brace}525{r_brace} and to a lesser degree for 11{l_brace}323{r_brace}. Lower valence solutes strengthen the GB at certain substitutional sites, while higher valence elements enforce it at other positions. For 3{l_brace}112{r_brace}, the alloys exhibit reduced cleavage energies. Hence, allowing with TMs increases the GB cohesion more effectively for large-angle GBs whose cleavage energy is, in general, inherently lower than the low-angle ones. Electron density analysis elucidates the mechanism of charge addition or depletion of the GB bonding region upon TM substitution at various positions leading to stronger or weaker intergranular cohesion, respectively.

Setyawan, Wahyu; Kurtz, Richard J.

2012-04-17T23:59:59.000Z

435

Boundary layer eddies at the Goodnoe Hills site  

DOE Green Energy (OSTI)

Data from nine instrumented meteorological towers at the MOD-2 wind turbine site at Goodnoe Hills in Washington State were analyzed to evaluate high-frequency perturbations, which were observed in the lower boundary-layer flow. Horizontal winds and temperature measurements for a period of 8 min, undisturbed by turbine operation, were available for this study. The data are in 1-s values from June 27, 1985. Throughout the study, departures from the mean for the period and for each sensor were used on area maps and on line-time and tower-time cross sections. Conventional streamline and isotach analyses were employed; they show highly organized flow fields with embedded perturbations traversing the site. Most of the flow fields have a well-developed vortical structure that reaches from the surface through the top level of the highest tower. These structures consist of a system of clockwise and counter-clockwise circulations. The wave length is about 500 to 600 m. Their wave speed is slightly greater than the mean wind speed and their movement is in the general direction of the mean flow. The results of the study show two main reasons why wind conditions and turbine power output in a wind farm may vary in a remarkable and abrupt fashion in space and time under certain circumstances: (1) The boundary-layer flow contains highly organized coherent perturbations with a typical size of 300 {times} 300 M{sup 2}. (2) The transition zones between the perturbations moving through a wind farm are associated with very definitive changes in the wind field that are on the order of meters and seconds. 2 refs., 11 figs.

Aspliden, C.I.; Wendell, L.L.; Clem, K.S.; Gower, G.L.

1991-05-01T23:59:59.000Z

436

On the parallelization of the acoustic wave equation with absorbing boundary conditions  

SciTech Connect

Many practical problems involve wave propagation through atmosphere, oceans, or terrestrial crust. Modeling and analysis of these problems is usually done in (semi)infinite domains, but numerical calculations obviously impose restriction to finite domains. To mimic the actual behavior in the (semi)infinite medium, artificial absorbing boundary conditions are imposed at the boundaries, whereby waves can only exit, but not enter the finite computational domain. Efficient absorbing boundary conditions are difficult to analyze and costly to run. In particular, it is of interest to assess whether the wave equation with (approximate or exact) absorbing boundary conditions admits a suitable diagonalization. This would open the possibility for parallelizing many important numerical codes used in applications. In this paper the authors propose a set of stable, local, absorbing boundary conditions for the discrete acoustic wave equation. They show that the acoustic wave equation with absorbing boundary conditions cannot be exactly diagonalized.

White, C.T. [California Inst. of Tech., Pasadena, CA (United States). Dept. of Mathematics; Protopopescu, V.A.; Barhen, J. [Oak Ridge National Lab., TN (United States). Center for Engineering Systems Advanced Research

1998-07-01T23:59:59.000Z

437

Tilt grain boundaries in YBa sub 2 Cu sub 3 O sub 7-x thin films  

Science Conference Proceedings (OSTI)

Grain boundaries in YBa{sub 2}Cu{sub 3}O{sub 7-x} superconductor thin films grown on (001) MgO by metal-organic chemical vapor deposition (MOCVD) have been characterized using transmission electron microscopy (TEM) and high-resolution electron microscopy (HREM). It was found that the YBa{sub 2}Cu{sub 3}O{sub 7-x} thin films were highly textured with the c axes, or (001) orientation, nearly parallel between grains and perpendicular to the MgO substrate. A majority of the grain boundaries are low-angle boundaries with a tilt angle, {theta}, less than 15{degree}. The low-angle boundaries appear to be strongly faceted on an atomic scale in such a way that the boundary planes tend to be parallel to the (100), (010), or (110) lattice planes in one of the adjacent grains. Almost all of the lattice planes, except for a number of distorted regions along the boundaries, are continuous across the boundaries from one grain to another, accommodating the misorientation with a slight bending of the lattice planes. The small-angle boundaries are shown to consist of arrays of dislocations. A domain structure, formed by the interchange of a and b axes has been observed in large grains. The domain boundaries are strongly faceted with the (100) and (010) lattice planes parallel to the boundaries. These observations on the atomic structure of boundaries, are used to discuss the effect of grain boundaries on superconductor properties in YBa{sub 2}Cu{sub 3}O{sub 7-x} thin films. 15 refs., 9 figs.

Gao, Y.; Bai, G.; Chang, H.L.M.; Merkle, K.L.; Lam, D.J.

1990-07-01T23:59:59.000Z

438

Nonconforming cell boundary element methods for elliptic problems on triangular mesh  

Science Conference Proceedings (OSTI)

The nonconforming cell boundary element (CBE) methods are proposed. The methods are designed in such a way that they enjoy the mass conservation at the element level and the normal component of fluxes at inter-element boundaries are continuous for unstructured ... Keywords: Multiscale method, 65N12, 65N30, Cell boundary element method, Finite volume, Flux conservation, Mixed finite element, Nonconforming finite element

Youngmok Jeon; Eun-Jae Park

2008-06-01T23:59:59.000Z

439

Stratificational and antipodean properties of boundary states for N x N density matrices  

E-Print Network (OSTI)

We investigate the space of N x N dimensional density matrices. We show that there exist strata such that boundary states \\rho_{p} with p zero eigenvalues lie on or outside the spheres with radii r_{p}=\\sqrt{p/N(N-p)}. Moreover, we show that if in a certain direction there is a boundary state with q=N-p equal eigenvalues, then in the opposite (antipodean) direction exists a boundary state with p=N-q equal eigenvalues.

S Kryszewski; M Zachcia?; ? Szparaga

2007-07-20T23:59:59.000Z

440

The boundary S-matrix and the AdS to CFT dictionary  

E-Print Network (OSTI)

An S-matrix analog is defined for anti-de Sitter space by constructing ``in'' and ``out'' states that asymptote to the timelike boundary. A derivation parallel to that of the LSZ formula shows that this ``boundary S-matrix'' is given directly by correlation functions in the boundary conformal theory. This provides a key entry in the AdS to CFT dictionary.

Steven B. Giddings

1999-03-04T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Large eddy simultations of the atmospheric boundary layer east of the Colorado Rockies  

SciTech Connect

Large eddy simulation, LES, has often been carried out for the idealized situation of a simple convective boundary layer. Studies of dual Doppler radar and aircraft data from the Phoenix II experiment indicate that the boundary layer of the Colorado High Plains is not a purely convective boundary layer and it is influenced by the mountains to the west. The purpose of this study is to investigate the atmospheric boundary layer on one particular day on the Colorado High Plains. This research applies a LES nested within larger grids, which contain realistic topography and can simulate the larger-scale circulations initiated by the presence of the mountain barrier. How and to what extent the atmospheric boundary layer of the Colorado High Plains is influenced by larger scale circulations and other phenomena associated with the mountain barrier to the west is investigated. The nested grid LES reproduces the characteristics of the atmosphere for the case study day reasonably well. The mountains influence the atmospheric boundary layer over the plains to the east in several ways. The mountains contribute to the vertical shear of the horizontal winds through the thermally-induced mountain-plains circulation. As a consequence of the wind shear, the boundary layer that develops over the mountains is advected eastward over the top of the plains boundary layer, which is developing separately. This layer is marked by a mixture of gravity waves and turbulence and is atypical of a purely convective boundary layer. Just below this layer, the capping inversion of the plains boundary layer is weak and poorly defined compared to the inversions capping purely convective boundary layers. Gravity waves, triggered by the obstacle of the Rocky Mountains and by convection in the mountain boundary layer, also influence the atmosphere above the Colorado High Plains. These influences are found to have significant effects on the turbulence statistics and the energy spectra.

Costigan, K.R.; Cotton, W.R.

1992-10-22T23:59:59.000Z

442

Grain Boundary Percolation Modeling of Fission Gas Release in Oxide Fuels  

Science Conference Proceedings (OSTI)

We present a new approach to fission gas release modeling in oxide fuels based on grain boundary network percolation. The method accounts for variability in the bubble growth and coalescence rates on individual grain boundaries, and the resulting effect on macroscopic fission gas release. Two-dimensional representa- tions of fuel pellet microstructures are considered, and the resulting gas release rates are compared with traditional two-stage Booth models, which do not account for long-range percolation on grain boundary net- works. The results show that the requirement of percolation of saturated grain boundaries can considerably reduce the total gas release rates, particularly when gas resolution is considered.

Paul C. Millett; Michael R. Tonks; S. B. Biner

2012-05-01T23:59:59.000Z

443

Analysis of the Fusion Boundary Region in Dissimilar Metal Welds at ...  

Science Conference Proceedings (OSTI)

On-Site Speaker (Planned), Ivan Mendoza-Bravo. Abstract Scope, The fusion boundary region (FBR) in Dissimilar Metal Welds (DMW) is where base and weld

444

The Glass Transition and Liquid-Gas Spinodal Boundaries of Metastable Liquids  

E-Print Network (OSTI)

A liquid can exist under conditions of thermodynamic stability or metastability within boundaries defined by the liquid-gas spinodal and the glass transition line. The relationship between these boundaries has been investigated previously using computer simulations, the energy landscape formalism, and simplified model calculations. We calculate these stability boundaries semi-analytically for a model glass forming liquid, employing accurate liquid state theory and a first-principles approach to the glass transition. These boundaries intersect at a finite temperature, consistent with previous simulation-based studies.

S. S. Ashwin; Gautam I. Menon; Srikanth Sastry

2005-12-30T23:59:59.000Z

445

Alaska NAD 83 Submerged Lands Act (SLA) Boundary | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Submerged Lands Act (SLA) Boundary Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Alaska NAD 83...

446

Influence of boundary conditions on the hydraulic-mechanical behaviour of an unsaturated swelling soil.  

E-Print Network (OSTI)

??The hydraulic-mechanical behaviour of swelling clay is examined in this thesis. The study includes laboratory testing and numerical modeling which considers the influence of boundary… (more)

Siemens, Gregory Allen

2006-01-01T23:59:59.000Z

447

Effect of magnetic boundary conditions on the dynamo threshold of von Karman swirling flows  

E-Print Network (OSTI)

We study the effect of different boundary conditions on the kinematic dynamo threshold of von Karman type swirling flows in a cylindrical geometry. Using an analytical test flow, we model different boundary conditions: insulating walls all over the flow, effect of sodium at rest on the cylinder side boundary, effect of sodium behind the impellers, effect of impellers or side wall made of a high-magnetic-permeability material. We find that using high-magnetic-permeability boundary conditions decreases the dynamo threshold, the minimum being achieved when they are implemented all over the flow.

Christophe Gissinger; Alexei Iskakov; Stephan Fauve; Emmanuel Dormy

2008-04-11T23:59:59.000Z

448

Where is the boundary for state and federal offshore oil and gas ...  

U.S. Energy Information Administration (EIA)

Wind › Geothermal › ... Where is the boundary for state and federal offshore oil and gas production? For most coastal states, the state jurisdiction extends about ...

449

Shear Response of an Al S5 Asymmetrical Tilt Grain Boundary ...  

Science Conference Proceedings (OSTI)

... grain boundaries is obviously smaller than that of the symmetrical ones. ... Phase Field Crystal Modeling of Microstructure in Multi-component Alloys.

450

Study of atmospheric boundary layer over Hong Kong using mobile micro-pulse lidar.  

E-Print Network (OSTI)

??Study of the boundary layer height, also known as the mixed layer height or mixing height, is of most importance to air pollution research and… (more)

Chan, Chiu Shing (???)

2005-01-01T23:59:59.000Z

451

A New Parameterization for Shallow Cumulus Convection and Its Application to Marine Subtropical Cloud-Topped Boundary Layers. Part II: Regional Simulations of Marine Boundary Layer Clouds  

Science Conference Proceedings (OSTI)

The impact of physical parameterizations on simulations of cloud-topped marine boundary layers is investigated using the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5). Three-month MM5 simulations of the northeast and ...

James R. McCaa; Christopher S. Bretherton

2004-04-01T23:59:59.000Z

452

Grain boundary dissipation in high-{Tc} superconductors  

SciTech Connect

Thin-film and bulk [001] tilt bicrystal grain boundaries (GBs) in YBa{sub 2}Cu{sub 3}O{sub 7} exhibit a strong dependence of critical current density, J{sub c} on misorientation angle. What was initially difficult to understand was the 30x smaller J{sub c} in bulk GBs which are microscopically more perfect. The authors review an explanation of this zero-field data, which is based on the pinning of Josephson vortices by the meandering found in thin-film GBs. In addition, there is evidence that J{sub c} of GBs does not drop as quickly with applied magnetic field as expected by simple Josephson junction models. The long-wavelength pinning potential due to meandering is less effective at high fields, but Gurevich and Cooley (GC) proposed a new mechanism for an enhanced GB J{sub c} arising from pinned Abrikosov vortices in the banks of a GB which present a static, quasiperiodic pinning potential to pin GB vortices. They find a peak in J{sub c} and an unusual hysteresis which give considerable support to the GC concept. In low fields, the GBs exhibit a larger J{sub c} for field cooling, which is opposite to the usual hysteresis but agrees with GC due to the larger Abrikosov vortex density in the banks. Magnetization data on the same sample are consistent including the identification of the irreversibility field.

Gray, K. E.; Miller, D. J.; Field, M. B.; Kim, D. H.; Berghuis, P.

2000-04-03T23:59:59.000Z

453

Boundary diffraction wave integrals for diffraction modeling of external occulters  

E-Print Network (OSTI)

An occulter is a large diffracting screen which may be flown in conjunction with a telescope to image extrasolar planets. The edge is shaped to minimize the diffracted light in a region beyond the occulter, and a telescope may be placed in this dark shadow to view an extrasolar system with the starlight removed. Errors in position, orientation, and shape of the occulter will diffract additional light into this region, and a challenge of modeling an occulter system is to accurately and quickly model these effects. We present a fast method for the calculation of electric fields following an occulter, based on the concept of the boundary diffraction wave: the 2D structure of the occulter is reduced to a 1D edge integral which directly incorporates the occulter shape, and which can be easily adjusted to include changes in occulter position and shape, as well as the effects of sources---such as exoplanets---which arrive off-axis to the occulter. The structure of a typical implementation of the algorithm is include...

Cady, E

2012-01-01T23:59:59.000Z

454

At the Boundary between Superconducting and Magnetic Oxides  

NLE Websites -- All DOE Office Websites (Extended Search)

At the Boundary between Superconducting and Magnetic Oxides The transistor, which shaped so much of our modern technology and economics, grew out of scientists' desire to gain a greater understanding of the interfaces between different materials. In the same way, today's materials scientists seek to expand our understanding of complex oxides by creating new states at the interface of two materials. Novel growth of complex oxides provides the ability to combine different materials with different and often antagonistic order parameters to create novel, strongly correlated states at the interface. As shown in the article, " Magnetism at the interface between ferromagnetic and superconducting oxides " in the April 2006 issue of Nature Physics, element-resolved x-ray probes and neutrons can be used to construct the first microscopic picture of interactions in a La[subscript 0.7]Ca[subscript 0.3]MnO[subscript 3]/YBa[subscript 2]Cu[subscript 3]O[subscript 7-x] superlattice.

455

Matched interface and boundary (MIB) method for elliptic problems with sharp-edged interfaces  

Science Conference Proceedings (OSTI)

Elliptic problems with sharp-edged interfaces, thin-layered interfaces and interfaces that intersect with geometric boundary, are notoriously challenging to existing numerical methods, particularly when the solution is highly oscillatory. This work generalizes ... Keywords: Elliptic equations, Ghost fluid method, Immersed boundary method, Immersed interface method, Sharp-edged interfaces

Sining Yu; Yongcheng Zhou; G. W. Wei

2007-06-01T23:59:59.000Z

456

Choice of governance mechanisms to promote information sharing via boundary objects in the disaster recovery process  

Science Conference Proceedings (OSTI)

Given the difficulties and criticality of information sharing in a multi-agency setting, this paper looks at the IT governance mechanisms used to promote information sharing via shared boundary objects in the disaster response and recovery process. A ... Keywords: Disaster response and recovery, IT governance, Information sharing, Multi-agency governance, Shared boundary objects

Barry A. Cumbie; Chetan S. Sankar

2012-12-01T23:59:59.000Z

457

Reproducing kernels of Sobolev spaces via a green kernel approach with differential operators and boundary operators  

Science Conference Proceedings (OSTI)

We introduce a vector differential operator P and a vector boundary operator B to derive a reproducing kernel along with its associated Hilbert space which is shown to be embedded in a ... Keywords: 41A30, 65D05, Boundary operator, Differential operator, Eigenfunction, Eigenvalue, Green kernel, Reproducing kernel

Gregory E. Fasshauer; Qi Ye

2013-05-01T23:59:59.000Z

458

A new wall-shear stress model for atmospheric boundary layer simulations  

Science Conference Proceedings (OSTI)

A new wall-shear stress model to be used as wall-boundary condition for Large Eddy Simulations of the Atmospheric Boundary Layer is proposed. The new model computes the wall shear stress and the vertical derivatives of the streamwise velocity ...

Marcus Hultmark; Marc Calaf; Marc B. Parlange

459

The use of direct boundary element method for gaining insight into complex seismic site response  

Science Conference Proceedings (OSTI)

The boundary element method is specially well suited for the analysis of the seismic response of valleys of complicated topography and stratigraphy. In this paper the method's capabilities are illustrated using as an example an irregularity stratified ... Keywords: Boundary element method, Euroseistest, Local conditions, Numerical modelling, Site effects

Sonia Álvarez-Rubio; Juan José Benito; Francisco José Sánchez-Sesma; Enrique Alarcón

2005-04-01T23:59:59.000Z

460

Baroclinic Eady Wave and Fronts. Part I: Viscous Semigeostrophy and the Impact of Boundary Condition  

Science Conference Proceedings (OSTI)

A two-dimensional viscous semigeostrophic model is developed to study the evolution of the baroclinic Eady wave and fronts with two types (free-slip and nonslip) of boundary conditions. With the free-slip boundary condition, the solution is very ...

Qin Xu; Wei Gu; Jidong Gao

1998-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "ks boundary sgp" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

POTTY ET AL. Simulation of Boundary Layer Structure over the Indian Summer Monsoon Trough  

E-Print Network (OSTI)

POTTY ET AL. Simulation of Boundary Layer Structure over the Indian Summer Monsoon Trough during The planetary boundary layer (PBL) structure over the Indian summer monsoon trough region has been simulated using a regional numerical model during the passage of a monsoon depression along the monsoon trough

Raman, Sethu

462

Two-Point Boundary Value Problems for Curves: The Case of Minimum Free Energy Paths  

E-Print Network (OSTI)

Two-Point Boundary Value Problems for Curves: The Case of Minimum Free Energy Paths corrected.S.A. Abstract The calculation of a minimum free energy path can be considered as a two-point boundary value box solvers. The second paragraph of Section 1 is corrected. Because free energy is defined in terms

Skeel, Robert

463

Ekman Pumping for Stratified Planetary Boundary Layers Adjacent to a Free Surface or Topography  

Science Conference Proceedings (OSTI)

In this paper, the classic Ekman pumping formulas for the vertical flow out of a boundary layer are generalized for both the layer above a rigid surface of variable slope and also for the boundary layer underneath a moving free surface. The ...

Benkui Tan

2000-10-01T23:59:59.000Z

464

Brief paper: Controlling the motion of charged particles in a vacuum electromagnetic field from the boundary  

Science Conference Proceedings (OSTI)

We consider the problem of driving two non-relativistic charged particles in a bounded vacuum electromagnetic field to the same location by applying electromagnetic forces through the boundary of the domain. The dynamics of the particles is modeled by ... Keywords: Boundary feedback, Charged particle, Maxwell-Lorentz system, Nuclear fusion, Perturbed energy

Luis R. Suazo; Weijiu Liu

2009-04-01T23:59:59.000Z

465

Fronts Formed by Obliquely Reflecting Internal Waves at a Sloping Boundary  

Science Conference Proceedings (OSTI)

A characteristic of internal waves reflecting from sloping boundaries is that they form fronts that travel with the component of the phase speed of the waves up the boundary. The strength of the fronts is assessed by estimating the magnitude of ...

S. A. Thorpe

1999-09-01T23:59:59.000Z

466

A box-type scheme for fractional sub-diffusion equation with Neumann boundary conditions  

Science Conference Proceedings (OSTI)

Combining order reduction approach and L1 discretization, a box-type scheme is presented for solving a class of fractional sub-diffusion equation with Neumann boundary conditions. A new inner product and corresponding norm with a Sobolev embedding inequality ... Keywords: Box-type scheme, Convergence, Energy method, Neumann boundary conditions, Stability, Sub-diffusion equation

Xuan Zhao; Zhi-zhong Sun

2011-07-01T23:59:59.000Z

467

Three-dimensional simulation of elastic capsules in shear flow by the penalty immersed boundary method  

Science Conference Proceedings (OSTI)

An improved penalty immersed boundary method (pIBM) has been proposed for simulation of flow-induced deformation of three-dimensional (3D) elastic capsules. The motion of the capsule membrane is described in the Lagrangian coordinates. The membrane deformation ... Keywords: Elastic capsule, Fluid-structure interaction, Penalty immersed boundary method, Red blood cell, Subdivision surface

Wei-Xi Huang; Cheong Bong Chang; Hyung Jin Sung

2012-04-01T23:59:59.000Z

468

A Cartesian grid embedded boundary method for the heat equation and Poissons equation in three dimensions  

E-Print Network (OSTI)

A Cartesian grid embedded boundary method for the heat equation and Poisson�s equation in three­85] and extends work of McCorquodale, Colella and Johansen [A Cartesian grid embedded boundary method for the heat and time for the heat equation. Cartesian grid methods for elliptic PDE have a long history beginning with the no

469

A Cartesian grid embedded boundary method for the heat equation on irregular domains  

E-Print Network (OSTI)

A Cartesian Grid Embedded Boundary Method for the Heatheat equation on irregular time-dependent domains. It is based on the Cartesian gridHEAT EQUATION FOR FIXED BOUNDARIES Spatial discretization The underlying discretization of space is given by rectangular control volumes on a Cartesian grid:

McCorquodale, Peter; Colella, Phillip; Johansen, Hans

2001-01-01T23:59:59.000Z

470

A fast direct method for solving the two-dimensional Helmholtz equation, with Robbins boundary conditions  

Science Conference Proceedings (OSTI)

We present a fast direct method for solving the two-dimensional Helmholtz equation: ?2?/?x2+?2?/?y2+?? = f(x,y), on a rectangular grid [0,a1] ... Keywords: Helmholtz, Neumann boundary conditions, Robbins boundary conditions, displacement rank

Jef Hendrickx; Raf Vandebril; Marc Van Barel

2001-08-01T23:59:59.000Z

471

Turbulent Fluxes in the Hurricane Boundary Layer. Part I: Momentum Flux  

Science Conference Proceedings (OSTI)

An important outcome from the ONR-sponsored Coupled Boundary Layer Air–Sea Transfer (CBLAST) Hurricane Program is the first-ever direct measurements of momentum flux from within hurricane boundary layers. In 2003, a specially instrumented NOAA P3 ...

Jeffrey R. French; William M. Drennan; Jun A. Zhang; Peter G. Black

2007-04-01T23:59:59.000Z

472

A Schur complement formulation for solving free-boundary, Stefan problems of phase change  

Science Conference Proceedings (OSTI)

A Schur complement formulation that utilizes a linear iterative solver is derived to solve a free-boundary, Stefan problem describing steady-state phase change via the Isotherm-Newton approach, which employs Newton's method to simultaneously and efficiently ... Keywords: Crystal growth, Free-boundary, GMRES, Schur complement, Solidification, Stefan problem

Lisa Lun; Andrew Yeckel; Jeffrey J. Derby

2010-10-01T23:59:59.000Z

473

Long-Term Observations of the Dynamics of the Continental Planetary Boundary Layer  

Science Conference Proceedings (OSTI)

Time series of mixed layer depth, zi, and stable boundary layer height from March through October of 1998 are derived from a 915-MHz boundary layer profiling radar and CO2 mixing ratio measured from a 447-m tower in northern Wisconsin. Mixed ...

Chuixiang Yi; Kenneth J. Davis; Bradford W. Berger; Peter S. Bakwin

2001-05-01T23:59:59.000Z

474

Boundary Layer and Mesoscale Structure over Lake Michigan during a Wintertime Cold Air Outbreak  

Science Conference Proceedings (OSTI)

An investigation of a cloud-topped boundary layer during a wintertime cold air outbreak over Lake Michigan has been conducted based on research aircraft 1 and 20 Hz data for five vertically-stacked levels within the boundary layer. Mean east-west ...

Ernest M. Agee; Mary L. Hart

1990-10-01T23:59:59.000Z

475

Automatic detection of lithologic boundaries using the Walsh transform: A case study from the KTB borehole  

Science Conference Proceedings (OSTI)

An automatic method of lithologic boundary detection based on Walsh transform theory is developed and applied to the German Continental Deep Drilling Project (KTB) borehole well log data. Walsh functions are natural choices for describing binary waveforms; ... Keywords: Borehole geophysics, KTB, Low-pass filtering, Rock boundary detection, Walsh transforms

Saumen Maiti; R. K. Tiwari

2005-10-01T23:59:59.000Z

476

Numerical simulation of the shock wave / boundary layer interaction in a shock tube by  

E-Print Network (OSTI)

Numerical simulation of the shock wave / boundary layer interaction in a shock tube by using a high in a shock tube after the shock wave has reflected at the end wall. When the fluid is viscous, a complex unsteady interaction takes place between the reflected shock wave and the incident boundary layer

477

Determination of a time-dependent heat transfer coefficient from non-standard boundary measurements  

Science Conference Proceedings (OSTI)

In this paper the determination of the time-dependent heat transfer coefficient in one-dimensional transient heat conduction from a non-standard boundary measurement is investigated. For this inverse nonlinear ill-posed problem the uniqueness of the ... Keywords: Boundary element method, Heat conduction, Heat transfer coefficient, Inverse problem

T. T. M. Onyango; D. B. Ingham; D. Lesnic; M. Slodi?ka

2009-01-01T23:59:59.000Z

478

Boundary Conditions for Semi-Lagrangian Schemes: Testing Some Alternatives in One-Dimensional Models  

Science Conference Proceedings (OSTI)

The one-dimensional advection equation and the one-dimensional advection adjustment equation with rotation are used as test beds for the design of well-posed boundary conditions for the initial-boundary-value problem using semi-Lagrangian ...

A. McDonald

2000-12-01T23:59:59.000Z

479

Formation and Development of Nocturnal Boundary Layer Clouds over the Southern Great Plains  

Science Conference Proceedings (OSTI)

The formation and evolution of nocturnal boundary layer clouds over land are studied using a simple well-mixed boundary layer theory. By analyzing the deepening rate of the mixed layer depth based on the turbulent kinetic energy budget of the ...

Ping Zhu; Bruce Albrecht; Jon Gottschalck

2001-06-01T23:59:59.000Z

480

Shock-unsteadiness model applied to oblique shock wave/turbulent boundary-layer interaction  

Science Conference Proceedings (OSTI)

Reynolds-averaged Navier-Stokes prediction of shock wave/turbulent boundary layer interactions can yield significant error in terms of the size of the separation bubble. In many applications, this can alter the shock structure and the resulting surface ... Keywords: high-speed flows, separation bubble, shock-unsteadiness, turbulence modelling, turbulent boundary layer

Amjad Ali Pasha; Krishnendu Sinha

2008-09-01T23:59:59.000Z

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481

Free Vibration Analysis of Kirchoff Plates with Damaged Boundaries by the Chebyshev Collocation Method  

E-Print Network (OSTI)

Free Vibration Analysis of Kirchoff Plates with Damaged Boundaries by the Chebyshev Collocation for the free vibration analysis of slender Kirchoff plates with both mixed and damaged boundaries an important role in applications of mechanical, aerospace and civil engineering. Studying the free vibration

Butcher, Eric A.

482

Preprint of the paper "A Validation of the Boundary Element Method for Grounding Grid Design and  

E-Print Network (OSTI)

- cades for substation grounding analysis, such as the Average Potential Method (APM), have been recentlyPreprint of the paper "A Validation of the Boundary Element Method for Grounding Grid Design://caminos.udc.es/gmni #12;A VALIDATION OF THE BOUNDARY ELEMENT METHOD FOR GROUNDING GRID DESIGN AND COMPUTATION I. Colominas

Colominas, Ignasi

483

Preprint of the paper "A Boundary Element Numerical Approach for Earthing Grid Computation"  

E-Print Network (OSTI)

in the margin of error [4]. A Boundary Element approach for the numerical computation of substation grounding-90. http://caminos.udc.es/gmni #12;A Boundary Element Numerical Approach for Grounding Grid Computation I~na, SPAIN Abstract Analysis and design of substation earthing involves computing the equivalent re- sistance

Colominas, Ignasi

484

Preprint of the paper "A Boundary Element Numerical Approach for Substation Grounding in a Two  

E-Print Network (OSTI)

Preprint of the paper "A Boundary Element Numerical Approach for Substation Grounding in a Two://caminos.udc.es/gmni #12;A BOUNDARY ELEMENT NUMERICAL APPROACH FOR SUBSTATION GROUNDING IN A TWO LAYER EARTH STRUCTURE3~na, SPAIN SUMMARY Analysis and design of substation grounding requires computing the distribution

Colominas, Ignasi

485

Where is the North ChinaSouth China block boundary in eastern China?  

E-Print Network (OSTI)

Where is the North China­South China block boundary in eastern China? Michel Faure, Wei Lin of the North China and South China blocks. The eastern extension of the belt (the Sulu area) consists and the lack of ocean-basin rock shows that the boundary between the North China block and South China block

Paris-Sud XI, Université de

486

A Boundary-Layer Model for Mars: Comparison with Viking Lander and Entry Data  

Science Conference Proceedings (OSTI)

A one-dimensional boundary-layer model for Mars is described, and its results are compared with Viking data. The model equations are similar to Earth boundary-layer models in that they include contributions from Coriolis, pressure gradient, and ...

Robert M. Haberle; Howard C. Houben; Rolf Hertenstein; Tomas Herdtle

1993-06-01T23:59:59.000Z

487

Role of Amorphous Boundary Layer in Enhancing Ionic Conductivity of Lithium–lanthanum–titanate Electrolyte  

DOE Green Energy (OSTI)

The low ionic conductivity is a bottleneck of the inorganic solid state electrolyte used for lithium ion battery. In ceramic electrolytes, grain boundary usually dominates the total conductivity. In order to improve the grain boundary effect, an amorphous silica layer is introduced into grain boundary of ceramic electrolytes based on lithium-lanthanum-titanate, as evidenced by electron microscopy. The results showed that the total ionic conductivity could be to be enhanced over 1 x 10{sup -4} S/cm at room temperature. The reasons can be attributed to removing the anisotropy of outer-shell of grains, supplement of lithium ions in various sites in grain boundary and close bindings among grains by the amorphous boundary layer among grains.

Mei, A.; Wang, X.; Lana, J.-L.; Fenga, Y.-C.; Genga, H.-X.; Lina, Y.-H.; Nana, C.-W.

2010-03-01T23:59:59.000Z

488

Radiation interaction with tilt grain boundaries in {beta}-SiC  

SciTech Connect

Interaction between grain boundaries and radiation is studied in 3C-SiC by conducting molecular dynamics cascade simulations on bicrystal samples with different misorientation angles. The damage in the in-grain regions was found to be unaffected by the grain boundary type and is comparable to damage in single crystal SiC. Radiation-induced chemical disorder in the grain boundary regions is quantified using the homonuclear to heteronuclear bond ratio ({chi}). We found that {chi} increases nearly monotonically with the misorientation angle, which behavior has been attributed to the decreasing distance between the grain boundary dislocation cores with an increasing misorientation angle. The change in the chemical disorder due to irradiation was found to be independent of the type of the grain boundary.

Swaminathan, Narasimhan [Materials Science and Engineering Department, University of Wisconsin - Madison, Madison, Wisconsin 53706-1595 (United States); Wojdyr, Marcin [Institute of High Pressure Physics UNIPRESS, ul. Sokolowska 29/37, 01-142 Warsaw (Poland); Morgan, Dane D.; Szlufarska, Izabela [Materials Science and Engineering Department, University of Wisconsin - Madison, Madison, Wisconsin 53706-1595 (United States); Materials Science Program, University of Wisconsin-Madison, Madison, Wisconsin 53706-1595 (United States)

2012-03-01T23:59:59.000Z

489

Double-Trace Deformations, Mixed Boundary Conditions and Functional Determinants in AdS/CFT  

E-Print Network (OSTI)

According to the AdS/CFT dictionary, perturbing the large N boundary theory by a relevant double-trace deformation of the form f O^2 corresponds in the bulk to imposing ``mixed'' boundary conditions for the field dual to O. In this note we address various aspects of this correspondence. The change c_{UV} - c_{IR} of the central charge between the UV ad IR fixed points is known from explicit calculations (hep-th/0210093, hep-th/0212138) to be exactly the same in the bulk and in the boundary theories. By comparing the appropriate bulk and boundary functional determinants, we give a simple ``kinematic'' explanation for this universal agreement. We also clarify the prescription for computing AdS/CFT correlators with Delta_- boundary conditions.

Hartman, T; Hartman, Thomas; Rastelli, Leonardo

2008-01-01T23:59:59.000Z

490

Double-Trace Deformations, Mixed Boundary Conditions and Functional Determinants in AdS/CFT  

E-Print Network (OSTI)

According to the AdS/CFT dictionary, perturbing the large N boundary theory by a relevant double-trace deformation of the form f O^2 corresponds in the bulk to imposing ``mixed'' boundary conditions for the field dual to O. In this note we address various aspects of this correspondence. The change c_{UV} - c_{IR} of the central charge between the UV ad IR fixed points is known from explicit calculations (hep-th/0210093, hep-th/0212138) to be exactly the same in the bulk and in the boundary theories. By comparing the appropriate bulk and boundary functional determinants, we give a simple ``kinematic'' explanation for this universal agreement. We also clarify the prescription for computing AdS/CFT correlators with Delta_- boundary conditions.

Thomas Hartman; Leonardo Rastelli

2006-02-10T23:59:59.000Z

491

DISCUSSIONS ON A TYPE OF RESERVOIR CELL BOUNDARY IN THE GEYSERS STEAM FIELD  

DOE Green Energy (OSTI)

The boundaries of reservoir fluid convection cells are discreet and intricate zones, commonly sealed or reduced in permeabilities, which are often quite readily identifiable in many hydrothermal systems. Cell boundaries in the Geysers Steam Field are more vague; however, they are gradually being revealed by cumulative and extensive wellbore data. A profound example of a type of boundary has been revealed by drilling in one area of the steam field. A proposed model utilizes a sericitic alteration scheme to establish cell self-sealing. Mineralogical, permeability, and temperature properties all coincide so as to allow formation of a boundary model. This reinforces previously held views that the reservoir cell rock and hydrothermal system are greatly out of equilibrium. Such similar phenomena are suggested from drilling experiences in other parts of the steam field. Considerably, more work is required to better define and comprehend the nature and location of reservoir cell boundaries within the Geysers Steam Field.

Hebein, J.L.

1985-01-22T23:59:59.000Z

492

Southern Great Plains  

NLE Websites -- All DOE Office Websites (Extended Search)

govSitesSouthern Great Plains govSitesSouthern Great Plains SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts Southern Great Plains SGP Central Facility, Lamont, OK 36° 36' 18.0" N, 97° 29' 6.0" W Altitude: 320 meters The Southern Great Plains (SGP) site was the first field measurement site established by DOE's Atmospheric Radiation Measurement (ARM) Program. Scientists are using the information obtained from the SGP to improve cloud and radiative models and parameterizations and, thereby, the performance of atmospheric general circulation models used for climate research.

493

Parameterization of Joint Frequency Distributions of Potential Temperature and Water Vapor Mixing Ratio in the Daytime Convective Boundary Layer  

Science Conference Proceedings (OSTI)

Joint frequency distributions (JFDs) of potential temperature (?) versus water vapor mixing ratio (r) within the convective boundary layer were measured during a new field experiment named Boundary Layer Experiment 1996 (BLX96). These JFDs were ...

Larry K. Berg; Roland B. Stull

2004-04-01T23:59:59.000Z

494

The Role of Meltwater Advection in the Formulation of Conservative Boundary Conditions at an Ice–Ocean Interface  

Science Conference Proceedings (OSTI)

Upper boundary conditions for numerical models of the ocean are conventionally formulated under the premise that the boundary is a material surface. In the presence of an ice cover, such an assumption can lead to nonconservative equations for ...

Adrian Jenkins; Hartmut H. Hellmer; David M. Holland

2001-01-01T23:59:59.000Z

495

A Cartesian grid embedded boundary method for solving the Poisson and heat equations with discontinuous coefficients in three dimensions  

E-Print Network (OSTI)

A composite grid solver for conjugate heat transfer in ?uid-A Cartesian grid embedded boundary method for the heatA cartesian grid embedded boundary method for the heat

Crockett, Robert

2010-01-01T23:59:59.000Z

496

PDF Parameterization of Boundary Layer Clouds in Models with Horizontal Grid Spacings from 2 to 16 km  

Science Conference Proceedings (OSTI)

Many present-day numerical weather prediction (NWP) models are run at resolutions that permit deep convection. In these models, however, the boundary layer turbulence and boundary layer cloud features are still grossly underresolved. ...

Vincent E. Larson; David P. Schanen; Minghuai Wang; Mikhail Ovchinnikov; Steven Ghan

2012-01-01T23:59:59.000Z

497

A Climatological Study of Internal Gravity Waves in the Atmospheric Boundary Layer Overlying the Brunt Ice Shelf, Antarctica  

Science Conference Proceedings (OSTI)

Internal gravity waves are frequently observed in stably stratified regions of the atmospheric boundary layer. In order to determine the statistical influence of such waves on the dynamics of the boundary layer it is necessary to compile ...

J. M. Rees; J. C. W. Denholm-Price; J. C. King; P. S. Anderson

2000-02-01T23:59:59.000Z

498

Real Freshwater Flux as a Natural Boundary Condition for the Salinity Balance and Thermohaline Circulation Forced by Evaporation and Precipitation  

Science Conference Proceedings (OSTI)

Freshwater flux used as a natural boundary condition for the salinity balance is applied to a primitive equation model of the oceanic general circulation. Instead of the relaxation condition or the virtual salt flux boundary conditions used in ...

Rui Xin Huang

1993-11-01T23:59:59.000Z

499

A Moist PBL Parameterization for Large-Scale Models and Its Application to Subtropical Cloud-Topped Marine Boundary Layers  

Science Conference Proceedings (OSTI)

A new general purpose boundary layer parameterization that permits realistic treatment of stratocumulus-capped boundary layers (SCBLs) with coarse vertical resolution is described. It combines a 1.5-order turbulent closure model with an ...

Hervé Grenier; Christopher S. Bretherton

2001-03-01T23:59:59.000Z

500

Impact of Surface Flux Formulations and Geostrophic Forcing on Large-Eddy Simulations of Diurnal Atmospheric Boundary Layer Flow  

Science Conference Proceedings (OSTI)

The impact of surface flux boundary conditions and geostrophic forcing on multiday evolution of flow in the atmospheric boundary layer (ABL) was assessed using large-eddy simulations (LES). The LES investigations included several combinations of ...

Vijayant Kumar; Gunilla Svensson; A. A. M. Holtslag; Charles Meneveau; Marc B. Parlange

2010-07-01T23:59:59.000Z