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Note: This page contains sample records for the topic "longwave broadband downwelling" 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.


1

ARM - Measurement - Longwave broadband downwelling irradiance  

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

downwelling irradiance downwelling irradiance 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 : Longwave broadband downwelling irradiance The total diffuse and direct radiant energy, at wavelengths longer than approximately 4 {mu}m, that is being emitted downwards. Categories Radiometric 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 BSRN : Baseline Solar Radiation Network BRS : Broadband Radiometer Station CO2FLX : Carbon Dioxide Flux Measurement Systems

2

ARM - Measurement - Shortwave broadband total downwelling irradiance  

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

downwelling irradiance downwelling irradiance 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 : Shortwave broadband total downwelling irradiance The total diffuse and direct radiant energy that comes from some continuous range of directions, at wavelengths between 0.4 and 4 {mu}m, that is being emitted downwards. Categories Radiometric 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 AMC : Ameriflux Measurement Component BSRN : Baseline Solar Radiation Network

3

ARM - Measurement - Shortwave broadband diffuse downwelling irradiance  

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

diffuse downwelling irradiance diffuse downwelling irradiance 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 : Shortwave broadband diffuse downwelling irradiance All of the solar radiation, across the wavelength range of 0.4 and 4 {mu}m, coming directly from the sky except for solar radiation coming directly from the sun and the circumsolar irradiance within approximately three degrees of the sun. Categories Radiometric 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

4

A 20-Year Dataset of Downwelling Longwave Flux at the Arctic Surface from TOVS Satellite Data  

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

20-Year Dataset of Downwelling Longwave Flux 20-Year Dataset of Downwelling Longwave Flux at the Arctic Surface from TOVS Satellite Data J. Francis Rutgers University New Brunswick, New Jersey A. Schweiger Polar Science Center University of Washington Seattle, Washington J. Key National Oceanic and Atmospheric Administration National Environmental Satellite, Data, and Information Service Madison, Wisconsin Introduction This paper summarizes the progress of a study under way to generate a 20-year dataset of surface downwelling longwave flux (DLF) retrievals from satellite data over the Arctic Ocean. We will produce daily fields between late 1979 and late 1998 on a grid with a spatial resolution of 100 km x 100 km 2 north of 60°N. Surface measurements from the Surface Heat Budget of the Arctic (SHEBA) and the

5

Broadband Longwave Radiative Cooling Rates in Inhomogeneous Stratocumulus Clouds  

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

Broadband Longwave Radiative Cooling Rates in Broadband Longwave Radiative Cooling Rates in Inhomogeneous Stratocumulus Clouds M. Ovtchinnikov and T. P. Ackerman Pacific Northwest National Laboratory Richland, Washington D. B. Mechem and Y. L. Kogan Cooperative Institute for Mesoscale Meteorological Studies University of Oklahoma Norman, Oklahoma R. F. Cahalan National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland A. B. Davis Los Alamos National Laboratory Los Alamos, New Mexico R. G. Ellingson and E. E.Takara Florida State University Tallahassee, Florida K. F. Evans University of Colorado Boulder, Colorado Introduction We are concerned with three-dimensional (3D) effects of longwave (LW) radiative transfer (RT) through inhomogeneous clouds. In cloud models, LW RT is typically calculated under the independent

6

ARM - Measurement - Net broadband total irradiance  

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

govMeasurementsNet broadband total irradiance govMeasurementsNet broadband total irradiance 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 : Net broadband total irradiance The difference between upwelling and downwelling, covering longwave and shortwave radiation. Categories Radiometric 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 EBBR : Energy Balance Bowen Ratio Station SEBS : Surface Energy Balance System External Instruments ECMWF : European Centre for Medium Range Weather Forecasts Model

7

ARM - Measurement - Shortwave broadband direct downwelling irradiance  

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

Experimental) RADFLUXANAL : Radiative Flux Analysis SWFLUXANAL : Shortwave Flux Analysis UAV-ALTUS : UAV Altus UAV-EGRETT : UAV-Egrett UAV-GNAT : UAV-General Atomics GNAT...

8

Geoengineering Downwelling Ocean Currents: A Cost Assessment  

Science Journals Connector (OSTI)

Downwelling ocean currents carry carbon into the deep ocean (the solubility pump), and play a ... weakening of the NADW is modification of downwelling ocean currents, by an increase in carbon concentration or ......

S. Zhou; P. C. Flynn

2005-07-01T23:59:59.000Z

9

ARM - Measurement - Shortwave spectral total downwelling irradiance  

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

Shadowband Spectroradiometer SPEC-TOTDN : Shortwave Total Downwelling Spectrometer UAV-EGRETT : UAV-Egrett Value-Added Products VISST : Minnis Cloud Products Using Visst...

10

ARM - Measurement - Shortwave narrowband diffuse downwelling...  

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

: Shortwave narrowband diffuse downwelling irradiance The rate at which radiant energy in narrow bands of wavelengths shorter than approximately 4 mum, that has been...

11

ARM - Measurement - Longwave narrowband radiance  

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

Send Measurement : Longwave narrowband radiance The rate at which radiant energy in the longwave portion of the spectrum is emitted in narrow wavelength bands in a...

12

ARM - Measurement - Longwave broadband net irradiance  

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

Range Weather Forecasts Diagnostic Analyses ECMWF : European Centre for Medium Range Weather Forecasts Model Data GMS : Geostationary Meteorological Satellite GOES :...

13

ARM - Measurement - Longwave broadband upwelling irradiance  

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

Radiation IAP : In-situ Aerosol Profiles (Cessna Aerosol Flights) IRT : Infrared Thermometer MFRIRT : Multifilter Radiometer and Infrared Thermometer RAD : Radiation...

14

ARM - Measurement - Shortwave narrowband total downwelling irradiance  

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

downwelling irradiance downwelling irradiance 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 : Shortwave narrowband total downwelling irradiance The rate at which radiant energy, in narrow bands of wavelengths shorter than approximately 4 {mu}m, passes through a horizontal unit area in a downward direction. Categories Radiometric 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 MFRSR : Multifilter Rotating Shadowband Radiometer NFOV : Narrow Field of View Zenith Radiometer

15

ARM - Measurement - Shortwave narrowband direct downwelling irradiance  

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

downwelling irradiance downwelling irradiance 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 : Shortwave narrowband direct downwelling irradiance The direct unscattered radiant energy from the Sun, in a narrow band of wavelengths shorter than approximately 4 {mu}m, passing through a horizontal unit area in a downward direction. Categories Radiometric 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. Field Campaign Instruments SOAR : Shipboard Oceanographic and Atmospheric Radiation

16

ARM - Measurement - Shortwave spectral diffuse downwelling irradiance  

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

diffuse downwelling irradiance diffuse downwelling irradiance 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 : Shortwave spectral diffuse downwelling irradiance The rate at which spectrally resolved radiant energy at wavelengths shorter than approximately 4 {mu}m, that has been scattered in the atmosphere at least once, passes through a horizontal unit area in a downward direction. Categories Radiometric 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 RSS : Rotating Shadowband Spectroradiometer

17

A 22-Year Dataset of Surface Longwave Fluxes in the Arctic  

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

22-Year Dataset of Surface Longwave Fluxes 22-Year Dataset of Surface Longwave Fluxes in the Arctic J. Francis and J. Secora Institute of Marine and Coastal Sciences Rutgers University New Brunswick, New Jersey Abstract Downwelling longwave fluxes (DLFs) over the Arctic surface have been generated from 22.5 years of radiances and retrievals from the TIROS (television and infrared observation satellite) operational vertical sounder (TOVS). The flux retrieval algorithm has been validated and improved using surface- based radiation and cloud observations from the Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) site in Barrow, Alaska, and from the Surface Heat Balance of the Arctic (SHEBA) field program (1997-98) in the Beaufort Sea. The DLF product is presented on a 100 x

18

ARM - Measurement - Longwave spectral radiance  

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

spectral radiance spectral radiance 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 : Longwave spectral radiance The rate at which the spectrally resolved radiant energy in the longwave portion of the spectrum is emitted in a particular direction per unit area perpendicular to the direction of radiation. Categories Radiometric 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 AERI : Atmospheric Emitted Radiance Interferometer ASSIST : Atmospheric Sounder Spectrometer for Infrared Spectral

19

Long-Wave Infrared | Open Energy Information  

Open Energy Info (EERE)

Long-Wave Infrared Long-Wave Infrared Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Long-Wave Infrared Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: Passive Sensors Parent Exploration Technique: Passive Sensors Information Provided by Technique Lithology: Map characteristic minerals associated with hot springs/mineral deposits Stratigraphic/Structural: Hydrological: Thermal: Map surface temperatures Dictionary.png Long-Wave Infrared: Long Wave Infrared (LWIR) refers to multi- and hyperspectral data collected in the 8 to 15 µm wavelength range. LWIR surveys are sometimes referred to as "thermal imaging" and can be used to identify relatively warm features

20

Solar and Infrared Radiation Station (SIRS) Handbook  

SciTech Connect

The Solar Infrared Radiation Station (SIRS) provides continuous measurements of broadband shortwave (solar) and longwave (atmospheric or infrared) irradiances for downwelling and upwelling components. The following six irradiance measurements are collected from a network of stations to help determine the total radiative flux exchange within the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Climate Research Facility: Direct normal shortwave (solar beam) Diffuse horizontal shortwave (sky) Global horizontal shortwave (total hemispheric) Upwelling shortwave (reflected) Downwelling longwave (atmospheric infrared) Upwelling longwave (surface infrared)

Stoffel, T

2005-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

ARM - Datastreams - brs60s  

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

Datastreamsbrs60s Datastreamsbrs60s Documentation Data Quality Plots Citation DOI: 10.5439/1025162 [ What is this? ] Generate Citation 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 Datastream : BRS60S Broadband Radiometer Station (BRS): 60-second broadband shortwave and longwave radiation Active Dates 2001.03.05 - 2003.04.17 Measurement Categories Radiometric Originating Instrument Broadband Radiometer Station (BRS) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Longwave broadband downwelling irradiance down_long_hemisp_shaded Longwave broadband downwelling irradiance down_long_hemisp_shaded_max Longwave broadband downwelling irradiance

22

Posters Monte Carlo Simulation of Longwave Fluxes Through Broken...  

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

5 Posters Monte Carlo Simulation of Longwave Fluxes Through Broken Scattering Cloud Fields E. E. Takara and R. G. Ellingson University of Maryland College Park, Maryland To...

23

Clear Skies A Study of Longwave Radiation Codes for Climate Studies...  

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

the outcome of this approach will provide both a better longwave radiative forcing algorithm and a better understanding of how longwave radiative forcing influences the...

24

ARM - Measurement - Longwave narrowband brightness temperature  

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

narrowband brightness temperature narrowband brightness temperature 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 : Longwave narrowband brightness temperature A descriptive measure of radiation in terms of the temperature of a hypothetical black body emitting an identical amount of radiation in the same narrow band of wavelengths. Categories Radiometric 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 IRT : Infrared Thermometer Field Campaign Instruments RAD-AIR : Airborne Radiometers

25

ARM - Measurement - Longwave narrowband upwelling irradiance  

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

narrowband upwelling irradiance narrowband upwelling irradiance 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 : Longwave narrowband upwelling irradiance The total radiant energy, in a narrow band of wavelengths longer than approximately 4 {mu}m, passing through a horizontal unit area in an upward direction. Categories Radiometric 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. Field Campaign Instruments OTTER : Twin Otter UAV-EGRETT : UAV-Egrett Value-Added Products LBTM-MINNIS : Minnis Cloud Products Using LBTM Algorithm (Process)

26

A comparison of cloudiness measures derived from longwave measurements and  

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

A comparison of cloudiness measures derived from longwave measurements and A comparison of cloudiness measures derived from longwave measurements and shortwave sky imagers Takara, Ezra Florida State University Ellingson, Robert Florida State University Ma, Yingtao University of Maryland Category: Cloud Properties In the longwave, two measures of cloudiness for single layer clouds are the probability of clear line of sight (PCLoS) and the effective cloud fraction. As the name states, the PCLoS is the probability of a clear line of sight through a broken cloud field. The effectivecloud fraction is the fraction of the sky that is taken up by the clouds; this includes the portion blocked by the cloud sides as well as the fraction taken up by the cloud bases. The effective cloud fraction can be derived from measurements or from the PCLoS. Here the PCLoS obtained from the shortwave-based Total

27

The atmosphere absorbs part of the outgoing longwave energy  

E-Print Network (OSTI)

intersecting Earth is S0 R2 · The global surface area of Earth is 4R2 · Divide the total energy rate, where R is the radius of the Earth Solar Radiation · The total energy rate for solar radiation7/20/10 1 The atmosphere absorbs part of the outgoing longwave energy Incoming solar radiation

Russell, Lynn

28

Definition: Long-Wave Infrared | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Long-Wave Infrared Jump to: navigation, search Dictionary.png Long-Wave Infrared Long Wave Infrared (LWIR) refers to multi- and hyperspectral data collected in the 8 to 15 µm wavelength range. LWIR surveys are sometimes referred to as "thermal imaging" and can be used to identify relatively warm features such as hot springs, fumaroles, and snow melt. LWIR can also be used to map the distribution of certain minerals related to hydrothermal alterations.[2] View on Wikipedia Wikipedia Definition References ↑ Katherine Young,Timothy Reber,Kermit Witherbee. 2012. Hydrothermal Exploration Best Practices and Geothermal Knowledge Exchange on Openei. In: Proceedings of the Thirty-Seventh Workshop on Geothermal

29

Use of OCA and APOLLO in Heliosat-4 method for the assessment of surface downwelling solar irradiance  

E-Print Network (OSTI)

-based assessments of surface downwelling solar irradiance (SSI) are more and more used in the domain of solar energy studies will be performed in order to better understand the advantage and disadvantage of each product, diffuse and direct surface irradiance for use in various domains: solar energy, biomass, agriculture

Paris-Sud XI, Université de

30

Technical Sessions A Study of Longwave Radiation Codes for Climate Studies:  

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

A Study of Longwave Radiation A Study of Longwave Radiation Codes for Climate Studies: Validation with ARM Observations and Tests in General Circulation Models R. G. Ellingson F. Baer Department of Meteorology University of Maryland College Park, MD 20742 Introduction the radiation sensitivity problem. We anticipate that the outcome of this approach will provide both a better longwave radiative forcing algorithm and a better understanding of how longwave radiative forcing influences the equilibrium climate of the atmosphere. Nature of Longwave Problems Longwave radiation quantities-radiances, fluxes and heating rates-are usually calculated in GCM models as the cloud amount weighted average of the values for clear and homogeneous cloud conditions. For example, the downward flux at the surface, F, may be written as

31

E-Print Network 3.0 - atmospheric longwave radiation Sample Search...  

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

January 1995, Dallas, TX. (56.12) THE GREENHOUSEEFFECT VISUALIZER Summary: to greenhouse effect is provided by subtracting the top of the atmosphere longwave radiation flux...

32

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

33

Multi-dimensional Longwave Forcing of Boundary Layer Cloud Systems  

SciTech Connect

The importance of multi-dimensional (MD) longwave radiative effects on cloud dynamics is evaluated in a large eddy simulation (LES) framework employing multi-dimensional radiative transfer (Spherical Harmonics Discrete Ordinate Method SHDOM). Simulations are performed for a case of unbroken, marine boundary layer stratocumulus and a broken field of trade cumulus. Snapshot calculations of MD and IPA (independent pixel approximation 1D) radiative transfer applied to LES cloud fields show that the total radiative forcing changes only slightly, although the MD effects significantly modify the spatial structure of the radiative forcing. Simulations of each cloud type employing MD and IPA radiative transfer, however, differ little. For the solid cloud case, relative to using IPA, the MD simulation exhibits a slight reduction in entrainment rate and boundary layer TKE relative to the IPA simulation. This reduction is consistent with both the slight decrease in net radiative forcing and a negative correlation between local vertical velocity and radiative forcing, which implies a damping of boundary layer eddies. Snapshot calculations of the broken cloud case suggest a slight increase in radiative cooling, though few systematic differences are noted in the interactive simulations. We attribute this result to the fact that radiative cooling is a relatively minor contribution to the total energetics. For the cloud systems in this study, the use of IPA longwave radiative transfer is sufficiently accurate to capture the dynamical behavior of BL clouds. Further investigations are required in order to generalize this conclusion for other cloud types and longer time integrations. 1

Mechem, David B.; Kogan, Y. L.; Ovtchinnikov, Mikhail; Davis, Anthony B; Evans, K. F.; Ellingson, Robert G.

2008-12-20T23:59:59.000Z

34

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.

35

Longwave thermal infrared spectral variability in individual rocks  

SciTech Connect

A hyperspectral imaging spectrometer measuring in the longwave thermal infrared (7.6-11.6 {micro}m) with a spatial resolution less than 4 mm was used in the field to observe the variability of emissivity spectra within individual rocks. The rocks were obtained commercially, were on the order of 20 cm in size and were selected to have distinct spectral features: they include alabaster (gypsum), soapstone (steatite with talc), obsidian (volcanic glass), norite (plagioclase and orthopyroxene), and 'jasper' (silica with iron oxides). The advantages of using an imaging spectrometer to spectrally characterize these rocks are apparent. Large spectral variations were observed within individual rocks that may be attributed to roughness, surface geometry, and compositional variation. Non-imaging spectrometers would normally miss these variations as would small samples used in laboratory measurements, spatially averaged spectra can miss the optimum spectra for identification materials and spatially localized components of the rock can be obscured.

Balick, Lee K [Los Alamos National Laboratory; Gillespie, Alan [UN. WASHINGTON; French, Andrew [USDA-ARS; Danilina, Iryna [UN. WASHINGTON

2008-01-01T23:59:59.000Z

36

Long-Wave Infrared At Coso Geothermal Area (1968-1971) | Open Energy  

Open Energy Info (EERE)

Long-Wave Infrared At Coso Geothermal Area (1968-1971) Long-Wave Infrared At Coso Geothermal Area (1968-1971) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Long-Wave Infrared At Coso Geothermal Area (1968-1971) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Long-Wave Infrared Activity Date 1968 - 1971 Usefulness useful DOE-funding Unknown Exploration Basis Fumarolic and hot springs activity Notes 8- to 14-micrometer IR imagery has value in delineating the typical arcuate structural patterns References Koenig, J.B.; Gawarecki, S.J.; Austin, C.F. (1 February 1972) Remote sensing survey of the Coso geothermal area, Inyo county, California. Technical publication 1968--1971 Retrieved from "http://en.openei.org/w/index.php?title=Long-Wave_Infrared_At_Coso_Geothermal_Area_(1968-1971)&oldid=473747"

37

A Global Climatology of Outgoing Longwave Spectral Cloud Radiative Effect and Associated Effective Cloud Properties  

Science Journals Connector (OSTI)

Longwave (LW) spectral flux and cloud radiative effect (CRE) are important for understanding the earths radiation budget and cloudradiation interaction. Here, the authors extend their previous algorithms to collocated Atmospheric Infrared ...

Xianglei Huang; Xiuhong Chen; Gerald L. Potter; Lazaros Oreopoulos; Jason N. S. Cole; Dongmin Lee; Norman G. Loeb

2014-10-01T23:59:59.000Z

38

Graphene-based long-wave infrared TM surface plasmon modulator  

Science Journals Connector (OSTI)

We describe theoretically a new long-wave infrared optical modulator based on the characteristics of TM surface plasmons in graphene. Calculations made using a finite-? random-phase...

Andersen, David R

2010-01-01T23:59:59.000Z

39

Implementing the National Broadband  

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

Type text] Type text] Response to Request for Information from the Department of Energy: Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy [FR Doc. 2010-11127] July 12, 2010 EnerNOC Page 2 of 8 EnerNOC, Inc. ("EnerNOC") is pleased to provide these comments to the Department of Energy in response to the Request for Information "Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy." EnerNOC is a provider of demand response and energy efficiency solutions to utilities, Independent

40

PROJECT SUMMARY Longwave Radiation Processes and Surface Energy Budget on the Antarctic Plateau  

E-Print Network (OSTI)

A-1 PROJECT SUMMARY Longwave Radiation Processes and Surface Energy Budget on the Antarctic Plateau on several projects: near-surface atmospheric temperature profiles, radiosonde performance at low images, and improvement of calibration procedures for interferometers. In the proposed work, analyses

Walden, Von P.

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Comparison of Long-Wave Infrared Imaging and Visible/Near-Infrared Imaging of Vegetation for  

E-Print Network (OSTI)

Comparison of Long-Wave Infrared Imaging and Visible/Near-Infrared Imaging of Vegetation using spectral imaging. This has been accom- plished with both visible/near-infrared (Vis/NIR) sunlight-path laser absorption measurements [14]­[16], in-situ visible and near-infrared (Vis/NIR) spectral

Lawrence, Rick L.

42

ARM - Datastreams - rad  

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

Datastreamsrad Datastreamsrad Documentation Data Quality Plots 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 Datastream : RAD Radiation measurements at AMF/Niamey, Niger/S1 Active Dates 2006.01.13 - 2008.12.13 Measurement Categories Radiometric Originating Instrument Radiation Measurements at AMF (RAD) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Longwave broadband downwelling irradiance Downwelling Longwave Hemispheric Irradiance, Pyrgeometer W/m^2 down_long_hemisp ( time ) Downwelling Pyrgeometer Case Thermistor Resistance Kohms down_long_hemisp_case_resist ( time )

43

Implementing the National Broadband  

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

Before the Before the Department of Energy Washington, D.C. 20585 In the Matter of Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities To Inform Federal Smart Grid Policy NBP RFI: Communications Requirements COMMENTS OF BALTIMORE GAS & ELECTRIC COMPANY I. Introduction BGE is the nation's oldest and most experienced utility company. It has met the energy needs of central Maryland for nearly 200 years. Today, it serves more than 1.2 million business and residential electric customers, and approximately 650,000 gas customers in an economically diverse, 2,300-square-mile area encompassing Baltimore City and all or part of ten central Maryland counties.

44

Long-wave infrared imaging of vegetation for detecting leaking CO2 gas  

E-Print Network (OSTI)

Long-wave infrared imaging of vegetation for detecting leaking CO2 gas Jennifer E. Johnson Joseph A for detecting leaking CO2 gas Jennifer E. Johnson,a Joseph A. Shaw,a Rick Lawrence,b Paul W. Nugent,a Laura M of these calibrated imagers is imaging of vegetation for CO2 gas leak detection. During a four-week period

Shaw, Joseph A.

45

Hollow Core Fiber Optics for Mid-Wave and Long-Wave Infrared Spectroscopy  

SciTech Connect

The development and testing of hollow core glass waveguides (i.e., fiber optics) for use in Long-Wave Infrared (LWIR) spectroscopy systems is described. LWIR fiber optics are a key enabling technology needed to improve the utility and effectiveness of trace chemical detection systems based in the 8 to 12 micron region. This paper focuses on recent developments in hollow waveguide technology geared specifically for LWIR spectroscopy, including a reduction in both the length dependent loss and the bending loss while maintaining relatively high beam quality. Results will be presented from tests conducted with a Quantum Cascade Laser.

Kriesel, J.M.; Gat, N.; Bernacki, Bruce E.; Erikson, Rebecca L.; Cannon, Bret D.; Myers, Tanya L.; Bledt, Carlos M.; Harrington, J. A.

2011-06-01T23:59:59.000Z

46

Clough-SA  

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

Longwave Broadband QME Based on ARM Longwave Broadband QME Based on ARM Pyrgeometer and AERI Measurements S. A. Clough, A. D. Brown, C. Andronache, and E. J. Mlawer Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts T. R. Shippert and D. D. Turner Pacific Northwest National Laboratory Richland, Washington D. C. Tobin, H. E. Revercomb, and R. O. Knuteson University of Maryland College Park, Maryland Introduction Accurate modeling of the downwelling longwave flux at the surface is critical to our understanding of a number of important issues: the earth's energy balance; processes at the atmosphere's lower boundary including ice melt and ocean forcing; and evaluating our ability to model atmospheric fluxes for dynamical models including numerical weather prediction and climate models. Under the Atmospheric

47

Broad-band beam buncher  

DOE Patents (OSTI)

A broad-band beam buncher is disclosed, comprising an evacuated housing, an electron gun therein for producing an electron beam, a buncher cavity having entrance and exit openings through which the beam is directed, grids across such openings, a source providing a positive DC voltage between the cavity and the electron gun, a drift tube through which the electron beam travels in passing through such cavity, grids across the ends of such drift tube, gaps being provided between the drift tube grids and the entrance and exit grids, a modulator for supplying an ultrahigh frequency modulating signal to the drift tube for producing velocity modulation of the electrons in the beam, a drift space in the housing through which the velocity modulated electron beam travels and in which the beam is bunched, and a discharge opening from such drift tube and having a grid across such opening through which the bunched electron beam is discharged into an accelerator or the like. The buncher cavity and the drift tube may be arranged to constitute an extension of a coaxial transmission line which is employed to deliver the modulating signal from a signal source. The extended transmission line may be terminated in its characteristic impedance to afford a broad-band response and the device as a whole designed to effect broad-band beam coupling, so as to minimize variations of the output across the response band.

Goldberg, David A. (Walnut Creek, CA); Flood, William S. (Berkeley, CA); Arthur, Allan A. (Martinez, CA); Voelker, Ferdinand (Orinda, CA)

1986-01-01T23:59:59.000Z

48

Multi-Dimensional Effects in Longwave Radiative Forcing of PBL Clouds  

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

Multi-Dimensional Effects in Longwave Radiative Forcing of PBL Clouds D. B. Mechem and Y. L. Kogan Cooperative Institute for Mesoscale Meteorological Studies University of Oklahoma Norman, Oklahoma M. Ovtchinnikov Pacific Northwest National Laboratory Richland, Washington K. F. Evans University of Colorado Boulder, Colorado A. B. Davis Los Alamos National Laboratory Los Alamos, New Mexico R. F. Cahalan National Aeronautic and Space Administration Goddard Space Flight Center Greenbelt, Maryland E. E. Takara and R. G. Ellingson Florida State University Tallahassee, Florida 1. Introduction Numerical cloud models nearly universally employ one-dimensional (1D) treatments of radiative transfer (RT). Radiative transfer is typically implemented as a 2- or 4-stream approximation to the

49

A Study of Longwave Radiation Codes for Climate Studies: Validation with ARM Observations and Tests in General Circulation Models  

SciTech Connect

One specific goal of the Atmospheric Radiation Measurements (ARM) program is to improve the treatment of radiative transfer in General Circulation Models (GCMs) under clear-sky, general overcast and broken cloud conditions. Our project was geared to contribute to this goal by attacking major problems associated with one of the dominant radiation components of the problem --longwave radiation. The primary long-term project objectives were to: (1) develop an optimum longwave radiation model for use in GCMs that has been calibrated with state-of-the-art observations for clear and cloudy conditions, and (2) determine how the longwave radiative forcing with an improved algorithm contributes relatively in a GCM when compared to shortwave radiative forcing, sensible heating, thermal advection and convection. The approach has been to build upon existing models in an iterative, predictive fashion. We focused on comparing calculations from a set of models with operationally observed data for clear, overcast and broken cloud conditions. The differences found through the comparisons and physical insights have been used to develop new models, most of which have been tested with new data. Our initial GCM studies used existing GCMs to study the climate model-radiation sensitivity problem. Although this portion of our initial plans was curtailed midway through the project, we anticipate that the eventual outcome of this approach will provide both a better longwave radiative forcing algorithm and from our better understanding of how longwave radiative forcing influences the model equilibrium climate, how improvements in climate prediction using this algorithm can be achieved.

Robert G. Ellingson

2004-09-28T23:59:59.000Z

50

ARM - Campaign Instrument - smart-rad  

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

govInstrumentssmart-rad govInstrumentssmart-rad Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : Broadband Radiometers from NASA SMART Trailer (SMART-RAD) Instrument Categories Radiometric Campaigns Application of the ARM Mobile Facility (AMF) to Study the Aerosol Indirect Effects in China [ Download Data ] Shouxian, Anhui, China; Mobile Facility, 2008.05.15 - 2008.12.29 Primary Measurements Taken The following measurements are those considered scientifically relevant. Refer to the datastream (netcdf) file headers for the list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Longwave broadband downwelling irradiance Shortwave broadband total downwelling irradiance

51

Using Narrow and Wide Field of View Instruments to Evaluate Longwave Parameterizations for Fair Weather Cumulus Cloud Fields  

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

Using Narrow and Wide Field of View Instruments to Using Narrow and Wide Field of View Instruments to Evaluate Longwave Parameterizations for Fair Weather Cumulus Cloud Fields E. E. Takara and R. G. Ellingson Department of Meteorology Florida State University Tallahassee, Florida Introduction Full blown three-dimensional (3D) radiation calculations for broken cloud fields consume too much time and computing resources to be included in climate models. The 3D effects can be approximated by effective cloud fractions which reduce the three-dimensional calculation to an average of plane parallel solutions - a much easier problem. For broken cloud conditions, the longwave flux (F) can be written as the weighted average of clear and overcast fluxes: overcast e clear e F N )F N 1 ( F (1) F clear is the clear-sky flux; the flux that would occur if the broken cloud field was removed. F

52

"Develop enabling optoelectronic devices for broadband  

E-Print Network (OSTI)

"Develop enabling optoelectronic devices for broadband communications and photonic systems Group Our group focuses on optoelectronic devices and photonic integrated circuits to photodiodes with the highest linearity and output power to date. High-Speed Optoelectronic Devices Driven

Acton, Scott

53

Subsurface Glider Localization Using Broadband Acoustic Sources  

E-Print Network (OSTI)

Researcher, ORE Abstract Ocean gliders are low-power, buoyancy-driven, autonomous underwater vehicles inherent in broadband ocean acoustic tomography signals, this uncertainty can be reduced by 1-2 orders

Frandsen, Jannette B.

54

Broad-band beam buncher  

DOE Patents (OSTI)

A broad-band beam bunther is disclosed, comprising an evacuated housing, an electron gun therein for producing an electron beam, a buncher cavity having entrance and exit openings through which the beam is directed, grids across such openings, a source providing a positive DC voltage between the cavity and the electron gun, a drift tube through which the electron beam travels in passing through such cavity, grids across the ends of such drift tube, gaps being provided between the drift tube grids and the entrance and exit grids, a modulator for supplying an ultrahigh frequency modulating signal to the drift tube for producing velocity modulation of the electrons in the beam, a drift space in the housing through which the velocity modulated electron beam travels and in which the beam is bunched, and a discharge opening from such drift tube and having a grid across such opening through which the bunched electron beam is discharged into an accelerator or the like. The buncher cavity and the drift tube may be arranged to constitute an extension of a coaxial transmission line which is employed to deliver the modulating signal from a signal source. The extended transmission line may be terminated in its characteristic impedance to afford a broad-

Goldberg, D.A.; Flood, W.S.; Arthur, A.A.; Voelker, F.

1984-03-20T23:59:59.000Z

55

splitt(2)-99.PDF  

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

Improvement in the Assessment of SIRS Broadband Improvement in the Assessment of SIRS Broadband Longwave Radiation Data Quality M. E. Splitt University of Utah Salt Lake City, Utah C. P. Bahrmann Cooperative Institute for Meteorological Satellite Studies University of Oklahoma Norman, Oklahoma Introduction Validation of the performance of the Solar Infrared Station (SIRS) pyrgeometers is being conducted for the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP). Cloud and Radiation Testbed (CART) site extended facilities (EFs). Improvements to this effort include comparison of the downwelling longwave irradiance to estimates from several published algorithms based on surface meteorological conditions (including temperature, vapor pressure, and the clearness index). The algorithms provide estimates for clear skies, overcast skies, and all-sky conditions (during daylight

56

Municipal wireless mesh networks as a competitive broadband delivery platform  

E-Print Network (OSTI)

Recently there has been a growing interest in deploying Wireless Mesh Networks by municipalities. This interest stems from the desire to provide broadband connectivity to users lacking access to broadband alternatives. The ...

Hassan-Ali, Mudhafar

2007-01-01T23:59:59.000Z

57

The Political Economies of Broadband Development in Korea and Japan  

E-Print Network (OSTI)

of DSL), gave Japan the fastest household broadband networksJapan third in the number of total broadband subscribers, 10 and by the end of 2005 over 44% of households

Kushida, Kenji; Oh, Seung-Youn

2007-01-01T23:59:59.000Z

58

Ultra-Trace Chemical Sensing with Long-Wave Infrared Cavity-Enhanced Spectroscopic Sensors  

SciTech Connect

The infrared sensors task of Pacific Northwest National Laboratory's (PNNL's) Remote Spectroscopy Project (Task B of Project PL211) is focused on the science and technology of remote and in-situ spectroscopic chemical sensors for detecting proliferation and coun-tering terrorism. Missions to be addressed by remote chemical sensor development in-clude detecting proliferation of nuclear or chemical weapons, and providing warning of terrorist use of chemical weapons. Missions to be addressed by in-situ chemical sensor development include countering terrorism by screening luggage, personnel, and shipping containers for explosives, firearms, narcotics, chemical weapons, or chemical weapons residues, and mapping contaminated areas. The science and technology is also relevant to chemical weapons defense, air operations support, monitoring emissions from chemi-cal weapons destruction or industrial activities, law enforcement, medical diagnostics, and other applications. Sensors for most of these missions will require extreme chemical sensitivity and selectiv-ity because the signature chemicals of importance are expected to be present in low con-centrations or have low vapor pressures, and the ambient air is likely to contain pollutants or other chemicals with interfering spectra. Cavity-enhanced chemical sensors (CES) that draw air samples into optical cavities for laser-based interrogation of their chemical content promise real-time, in-situ chemical detection with extreme sensitivity to specified target molecules and superb immunity to spectral interference and other sources of noise. PNNL is developing CES based on quantum cascade (QC) lasers that operate in the mid-wave infrared (MWIR - 3 to 5 microns) and long-wave infrared (LWIR - 8 to 14 mi-crons), and CES based on telecommunications lasers operating in the short-wave infrared (SWIR - 1 to 2 microns). All three spectral regions are promising because smaller mo-lecular absorption cross sections in the SWIR are offset by the superior performance, ma-turity, and robustness of SWIR lasers, detectors, and other components, while the reverse is true for the MWIR and LWIR bands. PNNL's research activities include identification of signature chemicals and quantification of their spectroscopy, exploration of novel sensing techniques, and experimental sensor system construction and testing. In FY02, experimental QC laser systems developed with DARPA funding were used to explore continuous-wave (cw) CES in various forms culminating in the NICE-OHMS technique [1-3] discussed below. In FY02 PNNL also built an SWIR sensor to validate utility of the SWIR spectral region for chemical sensing, and explore the science and engineering of CES in field environments. The remainder of this report is devoted to PNNL's LWIR CES research. During FY02 PNNL explored the performance and limitations of several detection tech-niques in the LWIR including direct cavity-enhanced absorption, cavity-dithered phase-sensitive detection and resonant sideband cavity-enhanced detection. This latter tech-nique is also known as NICE-OHMS, which stands for Noise-Immune Cavity-Enhanced Optical Heterodyne Molecular Spectroscopy. This technique, pioneered in the near infra-red (NIR) by Dr J. Hall and coworkers at the University of Colorado, is one of the most sensitive spectroscopic techniques currently known. In this report, the first demonstra-tion of this technique in the LWIR is presented.

Taubman, Matthew S.; Myers, Tanya L.; Cannon, Bret D.; Williams, Richard M.; Schultz, John F.

2003-02-20T23:59:59.000Z

59

ARM - Publications: Science Team Meeting Documents  

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

Aircraft Measurements of Spectral and Broadband Shortwave Albedo from the Aircraft Measurements of Spectral and Broadband Shortwave Albedo from the NASA Langley OV-10 Smith, W.L., Jr.(a), Charlock, T.P.(a), Roback, V.E.(a), Rutledge, C.K.(b), and Zhang, T.P.(b), NASA Langley Research Center (a), Analytical Services and Materials, Inc. (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting In order to validate and improve surface radiative fluxes derived as part of the Clouds and the Earth's Radiant Energy System (CERES) program, The CERES Fixed-wing Airborne Radiometer (CFAR) was developed to make measurements of upwelling and downwelling shortwave (spectral and broadband) and longwave (broadband) radiative fluxes. The CFAR consists of an OV-10A Bronco twin-turboprop, originally developed for military applications but chosen by NASA for atmospheric radiation measurements

60

Broadband Wireless Cognitive Radio-I  

E-Print Network (OSTI)

spectrum usage! #12;CMPE 591 - Broadband Wireless Networks 6 Cognitive Radio "Cognitive Radio" is the key portions of the spectrum is available and detect the presence of licensed users when a user operates in a licensed band. (Spectrum Sensing) 2. Select the best available channel. (Spectrum Decision) 3. Coordinate

Tuðcu, Tuna

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Broadband, Higher Education and Rural New Mexico  

E-Print Network (OSTI)

Broadband, Higher Education and Rural New Mexico Gil Gonzales, Ph.D., Chief Information Officer University of New Mexico, Albuquerque, NM 87131 E mail: gonzgil@unm.edu Background UNM students enjoy the country do. New Mexico is also home to two national laboratories in Los Alamos (Los Alamos National

Maccabe, Barney

62

Title Slide "The broadband acoustic output of  

E-Print Network (OSTI)

Title Slide "The broadband acoustic output of marine seismic airgun sources" Les Hatton CISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . #12;Seismic sources ­ marine airguns Introduction Modelling Marine Life Impact Where next Overview #12 Normal speed surface movie of airgun firing Courtesy IO limited #12;Seismic sources ­ marine airguns

Hatton, Les

63

Broadband solar absorption enhancement via periodic  

E-Print Network (OSTI)

Broadband solar absorption enhancement via periodic nanostructuring of electrodes Michael M. Adachi Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario M5S 3G4, Canada, 2 Province, 230009, P. R. China. Solution processed colloidal quantum dot (CQD) solar cells have great

64

In the Matter of National Broadband Plan Request for Information:  

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

In the Matter of National Broadband Plan Request for Information: In the Matter of National Broadband Plan Request for Information: Communications Requirements In the Matter of National Broadband Plan Request for Information: Communications Requirements The American Public Power Association ("APPA") appreciates this opportunity to respond to the Department of Energy ("the Department" or "DOE") regarding its Request for Information ("RFI") on Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy. In the Matter of National Broadband Plan Request for Information: Communications Requirements More Documents & Publications Communications Requirements of Smart Grid Technologies RE: NBP RFI: Communications Requirements

65

Multi-Dimensional Broadband IR Radiative Forcing of Marine Stratocumulus in a Large Eddy Simulation Model  

SciTech Connect

In order to address the interactive and evolutionary nature of the cloud-radiation interaction, we have coupled to a Large Eddy Simulation (LES) model the sophisticated multi-dimensional radiative transfer (MDRT) scheme of Evans (Spherical Harmonics Discrete Ordinate Method; 1998). Because of computational expense, we are at this time only able to run 2D experiments. Preliminary runs consider only the broadband longwave component, in large part because IR cloud top cooling is the significant forcing mechanism for marine stratocumulus. Little difference is noted in the evolution of unbroken stratocumulus between three-hour runs using MDRT and independent pixel approximation (IPA) for 2D domains of 50 km in the horizontal and 1.5 km in the vertical. Local heating rates differ slightly near undulating regions of cloud top, and a slight bias in mean heating rate from 1 to 3 h is present, yet the differences are never strong enough to result in a pronounced evolutionary bias in typical boundary layer metrics (e.g. inversion height, vertical velocity variance, TKE). Longer integration times may eventually produce a physical response to the bias in radiative cooling rates. A low-CCN case, designed to produce significant drizzle and induce cloud breakup does show subtle differences between MDRT and IPA. Over the course of the 6 hour simulations, entrainment is slightly less in the MDRT case, and the transition to the surface-based trade cumulus regime is delayed. Mean cooling rates appear systematically weaker in the MDRT case, indicative of a less energetic PBL and reflected in profiles of vertical velocity variance and TKE.

Mechem, David B.; Ovtchinnikov, Mikhail; Kogan, Y. L.; Davis, Anthony B; Cahalan, Robert F.; Takara, Ezra E.; Ellingson, Robert G.

2002-06-03T23:59:59.000Z

66

Implementing the National Broadband Plan by Empowering Consumers...  

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

Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy- Request for Information Implementing the National...

67

Broadband Diffractive Optics for Enhancing the Efficiency of Solar Cells  

Science Journals Connector (OSTI)

We propose a broadband diffractive optics based spectrum splitting approach to enhance the efficiency of solar cells. Numerical simulations indicate ~27% and ~45% increase in output...

Menon, Rajesh; Wang, Peng; Mohammed, Nabil

68

DOE Request for Information - Implementing the National Broadband...  

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

Request for Information - Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy DOE Request for Information...

69

Dielectric nanostructures for broadband light trapping in organic solar cells  

Science Journals Connector (OSTI)

We investigate broadband light trapping using only dielectric components to improve organic solar cell efficiency. We show that substantial absorption and photocurrent enhancement is...

Raman, Aaswath; Yu, Zongfu; Fan, Shanhui

70

Re: Implementing the National Broadband Plan by Studying the...  

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

Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy Re: Implementing the National Broadband Plan by Studying the Communications...

71

Re: DOE Request for Information - Implementing the National Broadband...  

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

the National Broadband Plan by Studying the Communications Requirements of Electric Utilities To Inform Federal Smart Grid Policy The Edison Electric Institute ("EEI"), on behalf...

72

Re: DOE Request for Information - Implementing the National Broadband...  

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

the National Broadband Plan by Studying the Communications Requirements of Electric Utilities To Inform Federal Smart Grid Policy (Federal RegisterVol.75, No.90Tuesday May 11,...

73

Re: DOE Request for Information - Implementing the National Broadband...  

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

the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy, which was published at 75 Federal Register...

74

Gas Phase Photoacoustic Spectroscopy in the long-wave IR using Quartz Tuning Forks and Amplitude Modulated Quantum Cascade Lasers  

SciTech Connect

A paper to accompany a 20 minute talk about the progress of a DARPA funded project called LPAS. ABSTRACT: We demonstrate the performance of a novel long-wave infrared photoacoustic laser absorbance spectrometer for gas-phase species using an amplitude modulated (AM) quantum cascade (QC) laser and a quartz tuning fork microphone. Photoacoustic signal was generated by focusing the output of a Fabry-Perot QC laser operating at 8.41 micron between the legs of a quartz tuning fork which served as a transducer for the transient acoustic pressure wave. The QC laser was modulated at the resonant frequency of the tuning fork (32.8 kHz). This sensor was calibrated using the infrared absorber Freon-134a by performing a simultanious absorption measurement using a 35 cm absorption cell. The NEAS of this instrument was determined to be 2 x 10^-8 W cm^-1 /Hz^1/2 and the fundamental sensitivity of this technique is limited by the noise floor of the tuning fork itself.

Wojcik, Michael D.; Phillips, Mark C.; Cannon, Bret D.

2006-12-31T23:59:59.000Z

75

Energy consumption of subscriber devices in broadband network  

Science Journals Connector (OSTI)

The paper provides estimates how deployment of fast fixed broadband may affect consumption of energy by subscriber's electronic devices. New subscribers are expected to buy additional equipment: PCs, laptops, TV sets, game consoles, etc. and more intensively ... Keywords: Broadband Access Network, Energy Consumption, Home Electronics, Next-Generation Access, Power Networks

Krzysztof Borzycki

2012-10-01T23:59:59.000Z

76

Identifying best practices for supporting broadband growth: Methodology and analysis  

E-Print Network (OSTI)

penetration rates focus on the preservation and extension of these rates. The main focus of this paper is to summarize the lessons learned from countries worldwide that present high broadband penetration rate data concerning broadband penetration, access technologies, market, prices and services for OECD

Bouras, Christos

77

Broadband VLF measurements of lightning-induced ionospheric perturbations  

E-Print Network (OSTI)

by the strong lightning flash by analyzing the broadband VLF spectrum from lightning that occurred just beforeBroadband VLF measurements of lightning-induced ionospheric perturbations Zhenggang Cheng 2005. [1] Very low frequency (VLF) electromagnetic pulses radiated by lightning are an effective tool

Cummer, Steven A.

78

Generating coherent broadband continuum soft-x-ray radiation by  

E-Print Network (OSTI)

Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating Thomas as the driver for high-harmonic generation that has a cosine-like electric field stabilized with respect the generation of broadband and tunable attosecond pulses. Instead of fixing the carrier-envelope phase

Neumark, Daniel M.

79

BROADBAND IDENTIFICATION OF BATTERY ELECTRICAL IMPEDANCE FOR HEV  

E-Print Network (OSTI)

­ CEA LETI/LITEN; P. Granjon ­ GIPSA-Lab; Abstract -- In recent years, Li-ion batteries have been for the broadband monitoring of a battery. Keywords-- battery impedance, spectroscopy, broadband signals, Li-ion system of EV and HEV. Li-ion battery technology is believed to be the most attractive

Paris-Sud XI, Université de

80

Cascaded frequency doublers for broadband laser radiation  

SciTech Connect

A new scheme of a cascaded converter of the first harmonic of broadband cw laser radiation into the second harmonic (SH) with compensation for the group walk-off in cascades is proposed and investigated. The conditions under which high conversion coefficients of broadband ({approx}33 cm{sup -1}) single-mode fibre laser radiation with low peak power ({approx}300 W) into the SH are determined for frequency doublers based on the most promising LBO crystal. Conversion of cw radiation with an average power of 300 W and efficiency {eta} = 4.5 % into the SH is obtained in a single LBO crystal. Effect of coherent addition of SH radiation excited in different cascades is demonstrated for two- and three-stage schemes. The expected conversion efficiencies, calculated disregarding loss but taking into account real aberrations of elements, are 18 % and 38 %, respectively. The effect of pumping depletion begins to manifest itself in the third cascade of a three-stage converter; it may reduce the latter value to {approx}30 %. (nonlinear optical phenomena)

Andreev, N F; Vlasova, K V; Davydov, V S; Kulikov, S M; Makarov, A I; Sukharev, Stanislav A; Freidman, Gennadii I; Shubin, S V

2012-10-31T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

ARM - Measurement - Shortwave broadband direct normal irradiance  

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

normal irradiance normal irradiance 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 : Shortwave broadband direct normal irradiance The rate at which radiant energy in broad bands of wavelengths shorter than approximately 4{mu}m, that comes directly from the Sun without being scattered or absorbed in the atmosphere, passes through a unit area perpendicular to the direction from the Sun. Categories Radiometric 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

82

Broadband acoustic imaging of breaking waves  

Science Journals Connector (OSTI)

An acoustic array was deployed in the near?surface layer in Saanich Inlet BC to image breaking waves using only the naturally occurring acoustical radiation in the band (160 and 2000 Hz) from the breaking region. The 15?element array was configured as a horizontal cross with an 8?m aperture bottom?moored and positioned nominally 3 m beneath the surface. A novel broadband scheme combined information at six independent frequencies above about 400 Hz to yield unambiguous resolved images. A parametric image analysis shows that the images align closely with the wind and can be observed moving downwind with a speed roughly equal to the dominant phase speed of the wind waves. Absolute power levels are found to be consistent with previously published results. The data also provide inferences regarding the sound generation mechanism at collective oscillation frequencies below about 400 Hz. [Work supported by ONR.

Rex K. Andrew; David M. Farmer; R. Lynn Kirlin

1997-01-01T23:59:59.000Z

83

BroadBand Europe Geneva, Switzerland 11-14 December 2006  

E-Print Network (OSTI)

from countries worldwide that present high broadband penetration rate. The policies adopted broadband penetration rate (such as Greece) However, the high broadband penetration rate cannot alone stand for the emerging digital economy and competitiveness. The current situation concerning the broadband penetration

Bouras, Christos

84

Supporting Broadband Growth in an Interregional Level: The Case of Greece-Italy Partnership  

E-Print Network (OSTI)

to these data, EU27 average stands at 20.0%. Denmark and Finland led the European in broadband penetration rate broadband penetration at 9.1%) is far behind. Italy has a broadband penetration rate up to 17.1%, which lies just below the EU27average broadband penetration rate. It is important to mention that even though

Bouras, Christos

85

ARM - Evaluation Product - Broadband Heating Rate Profile Project (BBHRP)  

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

ProductsBroadband Heating Rate Profile Project ProductsBroadband Heating Rate Profile Project (BBHRP) Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Broadband Heating Rate Profile Project (BBHRP) 2000.03.01 - 2006.02.28 Site(s) SGP General Description The objective of the ARM Broadband Heating Rate Profile (BBHRP) Project is to provide a structure for the comprehensive assessment of our ability to model atmospheric radiative transfer for all conditions. Required inputs to BBHRP include surface albedo and profiles of atmospheric state (temperature, humidity), gas concentrations, aerosol properties, and cloud properties. In the past year, the Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to combine all of the input properties

86

Efficient Video-on-Demand Streaming for Broadband Access Networks  

Science Journals Connector (OSTI)

We introduce three important factors for efficient video-on-demand (VoD) streaming strategy in broadband access networks such as a passive optical network (PON): an efficient streaming...

Choi, Joonho; Yoo, Myungsik; Mukherjee, Biswanath

2010-01-01T23:59:59.000Z

87

Broadband Light Photon Echoes and Collisional Energy Transfers  

Science Journals Connector (OSTI)

Broadband (incoherent) light pulses can be characterized in the time domain by the pulse duration ? L and by the inverse of the spectral width i.e. the coherenc...

A. Dbarre; J.-C. Keller; J.-L. Le Gout; P. Tchnio

1987-01-01T23:59:59.000Z

88

National Broadband Plan Request for Information: Communications Requirements  

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

Before the Before the Department of Energy Washington, D.C. 20585 In the Matter of National Broadband Plan Request for Information: Communications Requirements To: The Office of General Counsel COMMENTS OF THE AMERICAN PUBLIC POWER ASSOCIATION The American Public Power Association ("APPA") appreciates this opportunity to respond to the Department of Energy ("the Department" or "DOE") regarding its Request for Information ("RFI") on Implementing the National Broadband Plan by Studying the

89

The Broadband Afterglow of GRB980329  

E-Print Network (OSTI)

We present radio observations of the afterglow of the bright gamma-ray burst GRB980329 made between one month and several years after the burst, a re-analysis of previously published submillimeter data, and late-time optical and near-infrared (NIR) observations of the host galaxy. From the absence of a spectral break in the optical/NIR colors of the host galaxy, we exclude the earlier suggestion that GRB980329 lies at a redshift of z >~5. We combine our data with the numerous multi-wavelength observations of the early afterglow, fit a comprehensive afterglow model to the entire broadband dataset, and derive fundamental physical parameters of the blast-wave and its host environment. Models for which the ejecta expand isotropically require both a high circumburst density and extreme radiative losses from the shock. No low density model (n << 10 cm^{-3}) fits the data. A burst with a total energy of ~ 10^{51} erg, with the ejecta narrowly collimated to an opening angle of a few degrees, driven into a surrounding medium with density ~ 20 cm^{-3}, provides a satisfactory fit to the lightcurves over a range of redshifts.

S. A. Yost; D. A. Frail; F. A. Harrison; R. Sari; D. Reichart; J. S. Bloom; S. R. Kulkarni; G. H. Moriarty-Schieven; S. G. Djorgovski; P. A. Price; R. W. Goodrich; J. E. Larkin; F. Walter; D. S. Shepherd; D. W. Fox; G. B. Taylor; E. Berger; T. J. Galama

2002-04-08T23:59:59.000Z

90

ARM - Datastreams - prprad  

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

Datastreamsprprad Datastreamsprprad Documentation Data Quality Plots 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 Datastream : PRPRAD Portable Radiation Package: Broadband Radiometers Active Dates 2012.11.02 - 2013.09.26 Measurement Categories Radiometric Originating Instrument Portable Radiation Package (PRP) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Battery voltage volt battery_voltage ( time ) Temperature of RAD circuit board degC circuit_board_temperature ( time ) Longwave broadband downwelling irradiance

91

System and method for detection of dispersed broadband signals  

DOE Patents (OSTI)

A system and method for detecting the presence of dispersed broadband signals in real time are disclosed. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos[l brace]2[phi](t)[r brace]. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase [phi](t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of [phi][prime](t). 10 figs.

Qian, S.; Dunham, M.E.

1999-06-08T23:59:59.000Z

92

System and method for detection of dispersed broadband signals  

DOE Patents (OSTI)

A system and method for detecting the presence of dispersed broadband signals in real time. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos{2.phi.(t)}. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase .phi.(t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of .phi.'(t).

Qian, Shie (Austin, TX); Dunham, Mark E. (Los Alamos, NM)

1999-06-08T23:59:59.000Z

93

Implementing the National Broadband Plan by Empowering Consumers and the  

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

Implementing the National Broadband Plan by Empowering Consumers Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy On May 11, 2010, the Department of Energy (DOE) published a Request for Information seeking comments and information from interested parties to assist DOE in understanding current and potential practices and policies for the states and other entities to empower consumers (and perhaps others) through access to detailed energy information in electronic form-including real-time information from smart meters, historical consumption data, and pricing and billing information. DOE will hold a public meeting as part of this request for information.

94

Re: National Broadband Plan (NBP) Request for Information: Data Access |  

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

National Broadband Plan (NBP) Request for Information: Data National Broadband Plan (NBP) Request for Information: Data Access Re: National Broadband Plan (NBP) Request for Information: Data Access Whirlpool Corporation is honored to have been chosen as a recipient of a U.S. Department of Energy's (DOE) Smart Grid Investment Grant program grant of $19.3 million over a two year period - which the company will match with its own investments. Whirlpool Corporation recently announced that in 2011 it would deliver one million U.S. manufactured smart dryers capable of reacting intelligently to signals from the smart grid by modifying their energy consumption to save consumers money on their home electric bills. In addition, the funds will complement the company's commitment that by 2015 all of the electronically controlled appliances it produces - everywhere in

95

Re: DOE Request for Information - Implementing the National Broadband  

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

DOE Request for Information - Implementing the National DOE Request for Information - Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities To Inform Federal Smart Grid Policy Re: DOE Request for Information - Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities To Inform Federal Smart Grid Policy The Edison Electric Institute ("EEI"), on behalf of its member companies, hereby submits the following comments in response to the Request for Information ("RFI") by the Department of Energy ("Department" or "DOE") regarding the current and future communications requirements of utilities, including, but not limited to, the requirements of the Smart Grid in an effort to implement certain recommendations of the National Broadband Plan.

96

A Broadband Tensorial Magnetotelluric Study In The Travale Geothermal Field  

Open Energy Info (EERE)

Broadband Tensorial Magnetotelluric Study In The Travale Geothermal Field Broadband Tensorial Magnetotelluric Study In The Travale Geothermal Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Broadband Tensorial Magnetotelluric Study In The Travale Geothermal Field Details Activities (0) Areas (0) Regions (0) Abstract: As a contribution to the EEC study of the potential contribution of electric and electromagnetic techniques to geothermal exploration, magnetotelluric studies have been undertaken with a sounding bandwidth ranging from 2 to 7 decades of period at more than 30 sites within the chosen test area of Travale. This area must be one of the most unfavourable for the application of electrical techniques on account both of the thickness (up to 2 km) of conducting (< 1 ohm / m in some locations) cover

97

Perfect and broadband acoustic absorption by critical coupling  

E-Print Network (OSTI)

We experimentally and analytically report broadband and narrowband perfect absorption in two different acoustic waveguide-resonator geometries by the mechanism of critical coupling. In the first geometry the resonator (a Helmholtz resonator) is side-loaded to the waveguide and it has a moderate quality factor. In the second geometry the resonator (a viscoelastic porous plate) is in-line loaded and it contains two resonant modes with low quality factor. The interplay between the energy leakage of the resonant modes into the waveguide and the inherent losses of the system reveals a perfect and a broadband nearly perfect absorption. The results shown in this work can motivate relevant research for the design of broadband perfect absorbers in other domains of wave physics.

Romero-Garca, V; Richoux, O; Merkel, A; Tournat, V; Pagneux, V

2015-01-01T23:59:59.000Z

98

Characteristics of broadband lightning emissions associated with terrestrial gamma ray flashes  

E-Print Network (OSTI)

Characteristics of broadband lightning emissions associated with terrestrial gamma ray flashes] To characterize lightning processes that produce terrestrial gamma ray flashes (TGFs), we have analyzed broadband (lightning magnetic fields for TGFs detected by the Reuven Ramaty High Energy Solar

Cummer, Steven A.

99

Re: Implementing the National Broadband Plan by Studying the Communications  

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

Studying the Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy Re: Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy Alcatel-Lucent ("ALU") appreciates the opportunity to contribute to the Department of Energy's ("Department") Request for Information ("RFI")1 to better understand the communications requirements of utilities, including the requirements of Smart Grid Technology. ALU sees smart grid as one of several solutions offered by the technological advances and widespread deployment of broadband networks. While in its comments ALU addresses the narrow issues raised specifically in the Department's RFI, these comments also convey broader policy

100

Status of the Broadband Heating Rate Profile (BBHRP) VAP  

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

Status of the Broadband Heating Rate Profile (BBHRP) VAP Status of the Broadband Heating Rate Profile (BBHRP) VAP Mlawer, Eli Atmospheric & Environmental Research, Inc. Clough, Shepard Atmospheric and Environmental Research Delamere, Jennifer Atmospheric and Environmental Research, Inc. Miller, Mark Brookhaven National Laboratory Johnson, Karen Brookhaven National Laboratory Troyan, David Brookhaven National Laboratory Jensen, Michael Brookhaven National Laboratory Shippert, Timothy Pacific Northwest National Laboratory Long, Chuck Pacific Northwest National Laboratory Flynn, Connor Pacific Northwest National Laboratory Sivaraman, Chitra Pacific Northwest National Laboratory Turner, David University of Wisconsin-Madison Heck, Patrick University of Wisconsin Rutan, David Analytical Services & Materials, Inc.

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

The Quest for Ultimate Broadband High Power Microwaves  

E-Print Network (OSTI)

Paper describes High Power Microwave research of combining GW peak power to achieve MV/m and GV/m radiated fields in 1 to 500 GHz band. To achieve such fields multiple independently triggered broadband GW sources, supplying power to multiple spatially distributed broadband radiators/antennas are used. Single TW array is used as an ultimate microwave weapon in 1 to 5 GHz range while multiple TW arrays provide GV/m radiating field at plasma frequencies in 300 GHz range leading to fusion power.

Podgorski, Andrew S

2014-01-01T23:59:59.000Z

102

Analysis of Elephant Users in Broadband Network Traffic  

E-Print Network (OSTI)

Analysis of Elephant Users in Broadband Network Traffic P´eter Megyesi and S´andor Moln´ar High,molnar}@tmit.bme.hu Abstract. Elephant and mice phenomena of network traffic flows have been an interesting research area is caused by a small percentage of large flows, called the elephants. In this paper, we investigate the same

Molnár, Sándor

103

Broadband Photodetector Based on Carbon Nanotube Fibers Simon Lee,1  

E-Print Network (OSTI)

UG-30 Broadband Photodetector Based on Carbon Nanotube Fibers Simon Lee,1 Xuan Wang absorption properties of the carbon nanotube fibers generate a thermal distribution across the length of applications of carbon nanotubes has been constantly expanding since its inception. From being a copper wire

104

Dielectric nanostructures for broadband light trapping in organic solar cells  

E-Print Network (OSTI)

Dielectric nanostructures for broadband light trapping in organic solar cells Aaswath Raman, Zongfu light trapping configuration for thin-film solar cells," Appl. Phys. Lett. 91, 243501 (2007). 8. M@stanford.edu Abstract: Organic bulk heterojunction solar cells are a promising candidate for low-cost next

Fan, Shanhui

105

New Frontiers in Solar Physics: Broadband Imaging Spectroscopy with the  

E-Print Network (OSTI)

, the solar panel of the AASC recommended an integrated suite of instrumentation designed to meetNew Frontiers in Solar Physics: Broadband Imaging Spectroscopy with the Frequency Agile Solar and other astrophysical objects and processes. Outstanding problems in solar physics include the magnetic

106

ARM - Publications: Science Team Meeting Documents: Comparison of broadband  

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

Comparison of broadband solar irradiances measured on fixed and stabilized Comparison of broadband solar irradiances measured on fixed and stabilized platforms Ellingson, Robert Florida State University Takara, Ezra Florida State University Tooman, Tim Sandia National Laboratories Fixed and stabilized platform CM-22 radiometer observations obtained on long, constant altitude flight legs during the 2002 UAV flight series have been compared to estimate the possible improvements to shortwave absorption estimates that might be realized from stabilized measurements on stacked aircraft. This poster will chronicle the methods necessary to correct fixed platform measurements for aircraft pitch, roll and heading and will highlight the magnitude of the irradiance uncertainties resulting from the standard corrections. The fixed platform uncertainties at one level,

107

Implementing the National Broadband Plan by Empowering Consumers and the  

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

Privacy Privacy Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy On May 11, 2010, the Department of Energy (DOE) published a Request for Information seeking comments and information from interested parties to assist DOE in understanding current and potential practices and policies for the states and other entities to empower consumers (and perhaps others) through access to detailed energy information in electronic form-including real-time information from smart meters, historical consumption data, and pricing and billing information. DOE will hold a public meeting as part of this request for information. Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy

108

ARM TR-008  

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

DD PSP 9.0 6.0% or 20 Wm -2 Downwelling Shortwave (global) DS PSP 9.0 6.0% or 10 Wm -2 Downwelling Longwave (atmospheric) DIR PIR 4.0 2.5% or 4 Wm -2 Upwelling Shortwave...

109

Conversion efficiency of broad-band rectennas for solar energy harvesting applications  

Science Journals Connector (OSTI)

Optical antennas have been proposed as an alternative option for solar energy harvesting. In this work the power conversion efficiency of broadband antennas, log-periodic,...

Briones, Edgar; Alda, Javier; Gonzlez, Francisco Javier

2013-01-01T23:59:59.000Z

110

An Ultra-Scalable Broadband Architecture for Municipal Hybrid Wireless Access Using Optical Grid Network  

Science Journals Connector (OSTI)

A novel broadband architecture suitable for municipal hybrid wireless access is proposed. This architecture, called GROW-Net, is ultra-scalable in bandwidth support and infrastructure...

Shaw, Wei-Tao; Wong, Shing-Wa; Yen, She-Hwa; Kazovsky, Leonid G

111

Medium Voltage Overhead Power-line Broadband Communications; Transmission Capacity and Electromagnetic Interference  

E-Print Network (OSTI)

and Electromagnetic Interference P. Amirshahi and M. Kavehrad (FIEEE) The Pennsylvania State University, Department distribution networks for broadband power-line communications applications. Electromagnetic interference

Kavehrad, Mohsen

112

Re: NBP RFI-Implementing the National Broadband Plan by Studying...  

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

Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy Re: NBP RFI-Implementing the National Broadband Plan by Studying the...

113

E-Print Network 3.0 - amiba broadband heterodyne Sample Search...  

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

detectors with receiver noise temperatures of the Summary: Abstract - Broadband tunable, hot electron bolometer (HEB) heterodyne detectors with receiver noise... in this...

114

ARM - Instrument - sirs  

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

govInstrumentssirs govInstrumentssirs Documentation SIRS : Handbook SIRS : Instrument Mentor Monthly Summary (IMMS) reports SIRS : Data Quality Assessment (DQA) reports 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 Instrument : Solar and Infrared Radiation Station (SIRS) Instrument Categories Radiometric Picture of the Solar Infrared Radiation Station (SIRS) Picture of the Solar Infrared Radiation Station (SIRS) General Overview The Solar Infrared Radiation Station (SIRS) provides continuous measurements of broadband shortwave (solar) and longwave (atmospheric or infrared) irradiances for downwelling and upwelling components. These 1-minute data are collected from a network of stations to help determine

115

Section 78  

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

u%m u%m 2 2 &m 2 Session Papers 343 (1) A Narrow Band Longwave Radiation Model Based on Parameters Fitted to Line-by-Line Radiative Transfer Models J.X. Warner and R.G. Ellingson University of Maryland College Park, Maryland Introduction The results from the Intercomparison of Radiation Codes Used in Climate Models (ICRCCM) (Ellingson et al. 1991) showed about ±5% differences in flux calculations between the Narrow Band Models (NBMs) and Line-By-Line (LBL) models. Narrowband and broadband model calculations of downwelling radiance showed similar discrepancies with observations from the SPECTral Radiation Experiment (SPECTRE) and Atmospheric Radiation Measurement (ARM) program (Ellingson et al. 1995). The Malkmus (1967) statistical band model is often used in narrowband models to calculate atmospheric fluxes and heat-

116

1  

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

Analyses from TWP-ICE Analyses from TWP-ICE C.N. Long and J.H. Mather Pacific Northwest National Laboratory Richland, Washington N. Tapper and J. Beringer Monash University Melbourne, Australia B. Atkinson Australian Bureau of Meteorology Darwin, Australia Introduction Surface data collected during Tropical Warm Pool-International Cloud Experiment (TWP-ICE) includes radiation and standard meteorological measurements at six remote sites, as well as those at the ARM Climate Research Facility (ACRF) Darwin site (Figure 1). Five of these remote sites include not only unshaded broadband hemispheric shortwave (SW) and longwave (LW) instruments, but also a multi- detector SW radiometer designed to simultaneously measure both the downwelling diffuse and total SW

117

Implementing the National Broadband Plan by Studying the Communications  

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

Studying the Studying the Communications Requirements of Electric Utilities To Inform Federal Smart Grid Policy Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities To Inform Federal Smart Grid Policy The Department of Energy (DOE) is seeking comments and information from interested parties to assist DOE in understanding the communications requirements of utilities, including, but not limited to, the requirements of the Smart Grid. This RFI also seeks to collect information about electricity infrastructure's current and projected communications requirements, as well as the types of networks and communications services that may be used for grid modernization. Specifically, DOE seeks information on what types of communications capabilities that the utilities

118

Feasibility study of broadband efficient ''water window'' source  

SciTech Connect

We demonstrate a table-top broadband emission water window source based on laser-produced high-Z plasmas. Resonance emission from multiply charged ions merges to produce intense unresolved transition arrays (UTAs) in the 2-4 nm region, extending below the carbon K edge (4.37 nm). Arrays resulting from n=4-n=4 transitions are overlaid with n=4-n=5 emission and shift to shorter wavelength with increasing atomic number. An outline of a microscope design for single-shot live cell imaging is proposed based on a bismuth plasma UTA source, coupled to multilayer mirror optics.

Higashiguchi, Takeshi; Yugami, Noboru [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), and Optical Technology Innovation Center (OpTIC), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan); Japan Science and Technology Agency, CREST, 4-1-8 Honcho, Kanagawa, Saitama 332-0012 (Japan); Otsuka, Takamitsu [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), and Optical Technology Innovation Center (OpTIC), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan); Jiang Weihua [Department of Electrical Engineering, Nagaoka University of Technology, Kami-tomiokamachi 1603-1, Nagaoka, Niigata 940-2188 (Japan); Endo, Akira [Research Institute for Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku, Tokyo 169-8555 (Japan); Li Bowen; Dunne, Padraig; O'Sullivan, Gerry [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland)

2012-01-02T23:59:59.000Z

119

Broadband laser diode emitting at 1. 28. mu. m wavelength  

SciTech Connect

This letter presents a broadband laser diode (LD) emitting at the 1.28 ..mu..m wavelength fabricated by introducing an absorption region (300 ..mu..m long) into a conventional 600-..mu..m-long InGaAsP laser diode. The LD operates by the pulsed modulation of a high peak current whose repetition rate and duty cycle are respectively 200 kHz and 5%. The typical output power and the spectral width of the LD are 3.8 mW and 58 A, and the measured coherence length is 210 ..mu..m.

Takada, K.; Noda, J.

1985-10-15T23:59:59.000Z

120

Efficient broadband energy transfer via momentum matching at hybrid junctions of guided-waves  

E-Print Network (OSTI)

Efficient broadband energy transfer via momentum matching at hybrid junctions of guided://apl.aip.org/about/rights_and_permissions #12;Efficient broadband energy transfer via momentum matching at hybrid junctions of guided, The American University in Cairo, New Cairo 11835, Egypt (Received 2 August 2012; accepted 5 September 2012

Note: This page contains sample records for the topic "longwave broadband downwelling" 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.


121

Broadband absorption spectroscopy in turbid media by combined frequency-domain and  

E-Print Network (OSTI)

Broadband absorption spectroscopy in turbid media by combined frequency-domain and steady. Tromberg A technique for measuring broadband near-infrared absorption spectra of turbid media that uses selected wavelengths. Coefficients of absorption a and reduced scattering s derived from the FD data

Berger, Andrew J.

122

Novel Feeding Topologies for 2nd Harmonic Suppression in Broadband Microstrip Patch Antennas  

E-Print Network (OSTI)

Novel Feeding Topologies for 2nd Harmonic Suppression in Broadband Microstrip Patch Antennas *Il harmonic suppression property, while allowing for a broadband operation of microstrip patch antennas as well as a good 2nd harmonic suppression property. I. Introduction Microstrip patch antennas are very

Tentzeris, Manos

123

The FAST Copper Project: Fundamental Research in Fiber/DSL Broadband Access  

E-Print Network (OSTI)

1 The FAST Copper Project: Fundamental Research in Fiber/DSL Broadband Access Yung Yi, Dahai Xu Abstract This is an overview of the ongoing FAST Copper project, which aims at at substantial improvements in rate, reach, reliability, and quality in copper-last-mile broadband access through fiber/DSL deployment

Yi, Yung

124

Broadband Heating Rate Profile Project (BBHRP) - SGP ripbe1mcfarlane  

SciTech Connect

The objective of the ARM Broadband Heating Rate Profile (BBHRP) Project is to provide a structure for the comprehensive assessment of our ability to model atmospheric radiative transfer for all conditions. Required inputs to BBHRP include surface albedo and profiles of atmospheric state (temperature, humidity), gas concentrations, aerosol properties, and cloud properties. In the past year, the Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to combine all of the input properties needed for BBHRP into a single gridded input file. Additionally, an interface between the RIPBE input file and the RRTM was developed using the new ARM integrated software development environment (ISDE) and effort was put into developing quality control (qc) flags and provenance information on the BBHRP output files so that analysis of the output would be more straightforward. This new version of BBHRP, sgp1bbhrpripbeC1.c1, uses the RIPBE files as input to RRTM, and calculates broadband SW and LW fluxes and heating rates at 1-min resolution using the independent column approximation. The vertical resolution is 45 m in the lower and middle troposphere to match the input cloud properties, but is at coarser resolution in the upper atmosphere. Unlike previous versions, the vertical grid is the same for both clear-sky and cloudy-sky calculations.

Riihimaki, Laura; Shippert, Timothy

2014-11-05T23:59:59.000Z

125

Broadband Heating Rate Profile Project (BBHRP) - SGP ripbe370mcfarlane  

SciTech Connect

The objective of the ARM Broadband Heating Rate Profile (BBHRP) Project is to provide a structure for the comprehensive assessment of our ability to model atmospheric radiative transfer for all conditions. Required inputs to BBHRP include surface albedo and profiles of atmospheric state (temperature, humidity), gas concentrations, aerosol properties, and cloud properties. In the past year, the Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to combine all of the input properties needed for BBHRP into a single gridded input file. Additionally, an interface between the RIPBE input file and the RRTM was developed using the new ARM integrated software development environment (ISDE) and effort was put into developing quality control (qc) flags and provenance information on the BBHRP output files so that analysis of the output would be more straightforward. This new version of BBHRP, sgp1bbhrpripbeC1.c1, uses the RIPBE files as input to RRTM, and calculates broadband SW and LW fluxes and heating rates at 1-min resolution using the independent column approximation. The vertical resolution is 45 m in the lower and middle troposphere to match the input cloud properties, but is at coarser resolution in the upper atmosphere. Unlike previous versions, the vertical grid is the same for both clear-sky and cloudy-sky calculations.

Riihimaki, Laura; Shippert, Timothy

2014-11-05T23:59:59.000Z

126

Broadband Heating Rate Profile Project (BBHRP) - SGP ripbe1mcfarlane  

DOE Data Explorer (OSTI)

The objective of the ARM Broadband Heating Rate Profile (BBHRP) Project is to provide a structure for the comprehensive assessment of our ability to model atmospheric radiative transfer for all conditions. Required inputs to BBHRP include surface albedo and profiles of atmospheric state (temperature, humidity), gas concentrations, aerosol properties, and cloud properties. In the past year, the Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to combine all of the input properties needed for BBHRP into a single gridded input file. Additionally, an interface between the RIPBE input file and the RRTM was developed using the new ARM integrated software development environment (ISDE) and effort was put into developing quality control (qc) flags and provenance information on the BBHRP output files so that analysis of the output would be more straightforward. This new version of BBHRP, sgp1bbhrpripbeC1.c1, uses the RIPBE files as input to RRTM, and calculates broadband SW and LW fluxes and heating rates at 1-min resolution using the independent column approximation. The vertical resolution is 45 m in the lower and middle troposphere to match the input cloud properties, but is at coarser resolution in the upper atmosphere. Unlike previous versions, the vertical grid is the same for both clear-sky and cloudy-sky calculations.

Riihimaki, Laura; Shippert, Timothy

127

Broadband Heating Rate Profile Project (BBHRP) - SGP ripbe370mcfarlane  

DOE Data Explorer (OSTI)

The objective of the ARM Broadband Heating Rate Profile (BBHRP) Project is to provide a structure for the comprehensive assessment of our ability to model atmospheric radiative transfer for all conditions. Required inputs to BBHRP include surface albedo and profiles of atmospheric state (temperature, humidity), gas concentrations, aerosol properties, and cloud properties. In the past year, the Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to combine all of the input properties needed for BBHRP into a single gridded input file. Additionally, an interface between the RIPBE input file and the RRTM was developed using the new ARM integrated software development environment (ISDE) and effort was put into developing quality control (qc) flags and provenance information on the BBHRP output files so that analysis of the output would be more straightforward. This new version of BBHRP, sgp1bbhrpripbeC1.c1, uses the RIPBE files as input to RRTM, and calculates broadband SW and LW fluxes and heating rates at 1-min resolution using the independent column approximation. The vertical resolution is 45 m in the lower and middle troposphere to match the input cloud properties, but is at coarser resolution in the upper atmosphere. Unlike previous versions, the vertical grid is the same for both clear-sky and cloudy-sky calculations.

Riihimaki, Laura; Shippert, Timothy

128

DOE Takes Steps to Implement the National Broadband Plan | Department of  

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

Takes Steps to Implement the National Broadband Plan Takes Steps to Implement the National Broadband Plan DOE Takes Steps to Implement the National Broadband Plan May 11, 2010 - 12:54pm Addthis The Department of Energy has announced that it is taking steps to implement energy-related recommendations included in the National Broadband Plan, released by the Federal Communications Commission (FCC) in March. The plan included recommendations on a wide range of topics from expanding internet access to modernizing health information to integrating broadband technologies with the Smart Grid. DOE is taking the lead in assessing best practices for providing consumers access to energy data, along with studying the communications requirements of electric utilities to help inform federal Smart Grid policy. As part of the process of implementing these recommendations, the

129

Microsoft Word - Broadband Over Power Lines_FINAL.06.01.10.doc  

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

Broadband over Powerlines Can Accelerate the Transmission Smart Grid Broadband over Powerlines Can Accelerate the Transmission Smart Grid May 25, 2010 DOE/NETL-2010/1418 Broadband Over Power Lines Could Accelerate the Transmission Smart Grid Broadband Over Power Lines Could Accelerate the Transmission Smart Grid 1 Prepared by: Booz Allen Hamilton (BAH) Bruce Renz Renz Consulting, LLC DOE Contract number: DE-FE000400 Broadband Over Power Lines Could Accelerate the Transmission Smart Grid 2 Acknowledgements This report was prepared by Booz Allen Hamilton, Inc. (BAH) for the United States Department of Energy's National Energy Technology Laboratory. This work was completed under DOE NETL Contract Number DE-FE000400, and performed under BAH Task 430.04. The authors wish to acknowledge the excellent guidance, contributions, and cooperation of the

130

High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report | Open  

Open Energy Info (EERE)

High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report Jump to: navigation, search Tool Summary LAUNCH TOOL Name: High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report Focus Area: Crosscutting Topics: Policy Impacts Website: www.netl.doe.gov/smartgrid/referenceshelf/reports/HV-BPL_Final_Report. Equivalent URI: cleanenergysolutions.org/content/high-voltage-broadband-over-powerline Language: English Policies: "Deployment Programs,Financial Incentives" is not in the list of possible values (Deployment Programs, Financial Incentives, Regulations) for this property. DeploymentPrograms: Technical Assistance This reports details findings from a pilot High Voltage Broadband over Power Line (HV-BPL) program, an effort to develop a disruptive technology

131

The U.S. Market For Broadband Over Powerline, 3. edition  

SciTech Connect

The report provides a study of the potential market for BPL technology in the U.S. including a look at the past, present, and future state of Broadband Over Powerline (BPL) in the U.S. The Scope of the report includes the following topics: a description of the history of powerline communications (PLC) and broadband over powerline (BPL) technology; an analysis of key drivers of BPL within the electric utility and internet access industries; an overview of BPL technology and architecture; a comparison of BPL with alternative broadband access methods; an analysis of technological, regulatory, and business barriers to BPL's success; identification of the key applications and markets for BPL; a description of business models for BPL; an analysis of key market trends in broadband internet access; a review of the market development of cable modem broadband access; profiles of major U.S. BPL market participants; and, profiles of major U.S. BPL projects.

NONE

2007-07-15T23:59:59.000Z

132

Re: Implementing the National Broadband Plan by Empowering Consumers and  

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

Empowering Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy Re: Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy Exelon Corporation (Exelon) hereby submits the following comments in response to the request by the Department of Energy ("DOE" or "Department") for information on state efforts to enact Smart Grid privacy and data collection policies; utility practices and policies regarding data access and collection; third party access to detailed energy information; the role of the consumer in balancing benefits of data access and privacy; and policies and practices that should guide policymakers in determining who can access consumer energy information and under what conditions.1 Exelon

133

Calculated secondary yields for proton broadband using DECAY TURTLE  

SciTech Connect

The calculations for the yields were done by Al Sondgeroth and Anthony Malensek. The authors used the DECAY deck called PBSEC{_}E.DAT from the CMS DECKS library. After obtaining the run modes and calibration modes from the liaison physicist, they made individual decay runs, using DECAY TURTLE from the CMS libraries and a production spectrum subroutine which was modified by Anthony, for each particle and decay mode for all particle types coming out of the target box. Results were weighted according to branching ratios for particles with more than one decay mode. The production spectra were produced assuming beryllium as the target. The optional deuterium target available to broadband will produce slightly higher yields. It should be noted that they did not include pion yields from klong decays because they could not simulate three body decays. Pions from klongs would add a very small fraction to the total yield.

Sondgeroth, A.

1995-02-01T23:59:59.000Z

134

Broadband Excitation and Active Control of Terahertz Plasmons in Graphene  

E-Print Network (OSTI)

A novel broadband technique to effectively launch plasmons along a single graphene layer at terahertz (THz) frequencies is proposed. To this end, the coupling of the electromagnetic wave from a readily available plasmonic waveguide established by a periodically corrugated metallic surface to the graphene sheet is proposed. As will be shown, this technique can significantly surmount the need for efficient excitation of plasmons in graphene. For this purpose, an analytical technique based on transmission line theory is employed to calculate the scattering parameters of the connection of the plasmonic waveguides. In this manner, the gating effects of the graphene waveguide on the input reflection and transmission of the junction are also investigated. For comparison, a full wave numerical simulator is employed.

Khorrami, Mohammad Ali

2014-01-01T23:59:59.000Z

135

BROADBAND SPECTRAL INVESTIGATIONS OF SGR J1550-5418 BURSTS  

SciTech Connect

We present the results of our broadband spectral analysis of 42 SGR J1550-5418 bursts simultaneously detected with the Swift/X-ray Telescope (XRT) and the Fermi/Gamma-ray Burst Monitor (GBM), during the 2009 January active episode of the source. The unique spectral and temporal capabilities of the XRT windowed timing mode have allowed us to extend the GBM spectral coverage for these events down to the X-ray domain (0.5-10 keV). Our earlier analysis of the GBM data found that the SGR J1550-5418 burst spectra were described equally well with either a Comptonized model or with two blackbody functions; the two models were statistically indistinguishable. Our new broadband (0.5-200 keV) spectral fits show that, on average, the burst spectra are better described with two blackbody functions than with the Comptonized model. Thus, our joint XRT-GBM analysis clearly shows for the first time that the SGR J1550-5418 burst spectra might naturally be expected to exhibit a more truly thermalized character, such as a two-blackbody or even a multi-blackbody signal. Using the Swift and RXTE timing ephemeris for SGR J1550-5418 we construct the distribution of the XRT burst counts with spin phase and find that it is not correlated with the persistent X-ray emission pulse phase from SGR J1550-5418. These results indicate that the burst emitting sites on the neutron star need not to be co-located with hot spots emitting the bulk of the persistent X-ray emission. Finally, we show that there is a significant pulse phase dependence of the XRT burst counts, likely demonstrating that the surface magnetic field of SGR J1550-5418 is not uniform over the emission zones, since it is anticipated that regions with stronger surface magnetic field could trigger bursts more efficiently.

Lin Lin; Goegues, Ersin; Kaneko, Yuki [Faculty of Engineering and Natural Sciences, Sabanc Latin-Small-Letter-Dotless-I University, Orhanl Latin-Small-Letter-Dotless-I Tuzla, Istanbul 34956 (Turkey); Baring, Matthew G. [Department of Physics and Astronomy, Rice University, MS-108, P.O. Box 1892, Houston, TX 77251 (United States); Granot, Jonathan [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel); Kouveliotou, Chryssa [Space Science Office, VP62, NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States); Van der Horst, Alexander; Watts, Anna L. [Astronomical Institute 'Anton Pannekoek', University of Amsterdam, Postbus 94249, 1090 GE Amsterdam (Netherlands); Gruber, David; Von Kienlin, Andreas [Max-Planck-Institut fuer extraterrestrische Physik, Postfach 1312, D-85748 Garching bei Mnchen (Germany); Younes, George [USRA, National Space Science and Technology Center, 320 Sparkman Drive, Huntsville, AL 35805 (United States); Gehrels, Neil, E-mail: linlin@sabanciuniv.edu [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2012-09-01T23:59:59.000Z

136

Re: NBP RFI-Implementing the National Broadband Plan by Studying the  

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

Re: NBP RFI-Implementing the National Broadband Plan by Studying Re: NBP RFI-Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy Re: NBP RFI-Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy The Telecommunications Industry Association (TIA) is pleased to provide comments on the communications requirements of electric utilities relevant to smart grid policy. TIA appreciates the proactive role the Department of Energy (DOE) is taking in executing the recommendations from the FCC in the National Broadband Plan. Electric utilities and the ICT industry share a long tradition of partnering to build and maintain the communications networks contributing to the security and reliability of the grid.

137

Re: NBP RFI-Implementing the National Broadband Plan by Studying the  

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

Re: NBP RFI-Implementing the National Broadband Plan by Studying Re: NBP RFI-Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy Re: NBP RFI-Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy The Telecommunications Industry Association (TIA) is pleased to provide comments on the communications requirements of electric utilities relevant to smart grid policy. TIA appreciates the proactive role the Department of Energy (DOE) is taking in executing the recommendations from the FCC in the National Broadband Plan. Electric utilities and the ICT industry share a long tradition of partnering to build and maintain the communications networks contributing to the security and reliability of the grid.

138

Re: NBP RFI-Implementing the National Broadband Plan by Empowering...  

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

Empowering Consumers and the Smart Grid: Data Access, Third Party Use and Privacy Re: NBP RFI-Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid:...

139

Broadband Femtosecond Sources for Greenhouse Gas Spectroscopy and Trace-Gas Sensing  

Science Journals Connector (OSTI)

We describe several approaches for producing broadband femtosecond sources in the mid-infrared for applications in atmospheric spectroscopy. Using a 3.3 m source, measurements of CH4...

Neely, Tyler W; Johnson, Todd; Nugent-Glandorf, Lora; Adler, Florian; Diddams, Scott

140

2010 Telecommunications Policy Research Conference The FCC Plan for a Public Safety Broadband Wireless Network  

E-Print Network (OSTI)

2010 Telecommunications Policy Research Conference 1 The FCC Plan for a Public Safety Broadband;2010 Telecommunications Policy Research Conference 2 In March 2010, the U.S. Federal Communications Commission (FCC

Peha, Jon M.

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Acoustic scattering of broadband echolocation signals from prey of Blainville's beaked whales : modeling and analysis  

E-Print Network (OSTI)

Blainville's beaked whales (Mesoplodon densirostris) use broadband, ultrasonic echolocation signals (27 to 57 kHz) to search for, localize, and approach prey that generally consist of mid-water and deep-water fishes and ...

Jones, Benjamin A. (Benjamin Aaron)

2006-01-01T23:59:59.000Z

142

Radiative Effects of Dust Aerosols, Natural Cirrus Clouds and Contrails: Broadband Optical Properties and Sensitivity Studies  

E-Print Network (OSTI)

This dissertation aims to study the broadband optical properties and radiative effects of dust aerosols and ice clouds. It covers three main topics: the uncertainty of dust optical properties and radiative effects from the dust particle shape...

Yi, Bingqi

2013-07-09T23:59:59.000Z

143

Theory and design of integrated optical isolators and broadband couplers using Fresnel zone plates  

E-Print Network (OSTI)

This thesis is divided into two main sections: the first containing the analysis of the broadband vertical coupler, and the second involving the theory and design of the integrated optical isolators. In the first part we ...

Cordova, Brad Gilbert

2013-01-01T23:59:59.000Z

144

Widely-tunable femtosecond operation of Cr:LiSAF lasers using broadband saturable bragg reflectors  

E-Print Network (OSTI)

We describe a low-cost diode-pumped Cr:LiSAF laser, mode-locked using a broadband saturable Bragg reflector. The laser produces continuously tunable sub-200-fs pulses from 800 nm to 905 nm.

Demirbas, Umit

145

Optimization of Two-photon Excited Fluorescence Enhancement between Tunable and Broadband Femtosecond Laser Pulse Excitations  

E-Print Network (OSTI)

This project explores optimization of two-photon excited fluorescence (TPEF) enhancement between tunable narrowband and un-tuned broadband femtosecond (fs) laser pulse excitations for two-photon microscopy (TPM). The research is conducted...

Wang, Chao

2012-02-14T23:59:59.000Z

146

Fractal quantum well heterostructures for broadband light emitters  

SciTech Connect

We examine carrier relaxation and radiative recombination in AlGaAs based near IR and AlGaInP based visible fractal quantum well heterostructures. Through temperature dependent photoluminescence, we demonstrate that enhanced population of higher lying energy levels can be achieved by varying the thickness of the layers in the fractal heterostructurd. This distribution of carriers results in room temperature emission over a relatively broad range of wavelengths: approximately 700--855 nm for AlGaAs structures and 575--650 nm for AlGaInP structures. Spectra are compared to theoretical calculations to evaluate the non-equilibrium nature of the carrier distributions. Time resolved photoluminescence measurements demonstrate an approximately linear relationship between the radiative decay time and the layer thickness of the structure. Correspondingly, integrated luminescence measurements at room temperature reveal a factor of four increase in the light output efficiency of the structure as the fractal layer thickness is increased from 50 {angstrom} to 400 {angstrom}. The applicability of these heterostructures to broadband LEDs is discussed.

Crawford, M.H.; Gourley, P.L.; Meissner, K.E.; Sinclair, M.B.; Jones, E.D.; Chow, W.W.; Schneider, R.P. Jr.

1994-12-31T23:59:59.000Z

147

Broadband Model Performance for an Updated National Solar Radiation Database in the United States of America: Preprint  

SciTech Connect

Updated review of broadband model performance in a project being done to update the existing United States National Solar Radiation Database (NSRDB).

Myers, D. R.; Wilcox, S.; Marion, W.; George, R.; Anderberg, M.

2005-09-01T23:59:59.000Z

148

Broadband and Monochromatic X-ray Irradiation of Platinum: Monte Carlo Simulations for Dose Enhancement Factors and Resonant Theranostics  

Science Journals Connector (OSTI)

Introduction:...X-ray irradiation of heavy-element (high-Z) nanomaterials as radiosensitizing agents should be extremely efficient for therapy and diagnostics (theranostics). However, broadband rad...

S. Lim; M. Montenegro; A. K. Pradhan

2013-01-01T23:59:59.000Z

149

Broadband omnidirectional antireflection coatings for metal-backed solar cells optimized using simulated annealing algorithm incorporated with solar spectrum  

Science Journals Connector (OSTI)

Broadband omnidirectional antireflection (AR) coatings for solar cells optimized using simulated annealing (SA) algorithm incorporated with the solar (irradiance) spectrum at Earths...

Chang, Yin-Jung; Chen, Yu-Ting

2011-01-01T23:59:59.000Z

150

Effects of aerosol and horizontal inhomogeneity on the broadband albedo of marine stratus: Numerical simulations  

SciTech Connect

Recent estimates of the effect of increasing of anthropogenic sulfate aerosol on the radiative forcing of the atmosphere have indicated that its impact may be comparable in magnitude to the effect from increases in CO{sub 2}. Much of this impact is expected from the effects of the aerosol on cloud microphysics and the subsequent impact on cloud albedo. A solar broadband version of a 2D radiative transfer model was used to quantify the impact of enhanced aerosol concentrations and horizontal inhomogeneity on the solar broadband albedo of marine stratus. The results of the radiative transfer calculations indicated that in unbroken marine stratus clouds the net horizontal transport of photons over a domain of a few kilometers was nearly zero, and the domain-average broadband albedo computed in a 2D cross section was nearly identical to the domain average calculated from a series of independent pixel approximation (IPA) calculations of the same cross section. However, the horizontal inhomogeneity does affect the cloud albedo compared to plane-parallel approximation (PPA) computations due to the nonlinear relationship between albedo and optical depth. The reduction in cloud albedo could be related to the variability of the distribution of log (cloud optical depth). These results extend the finding of Cahalan et al. to broadband solar albedos in a more realistic cloud model and suggest that accurate computation of domain-averaged broadband albedos in unbroken (or nearly unbroken) marine stratus can be made using IPA calculations with 1D radiative transfer models. Computations of the mean albedo over portions of the 3D RAMS domain show the relative increase in cloud albedo due to a 67% increase in the boundary-layer average CCN concentration was between 6% and 9%. The effects of cloud inhomogeneity on the broadband albedo as measured from the PPA bias ranged from 3% to 5%. 25 refs., 8 figs., 4 tabs.

Duda, D.P.; Stephens, G.L.; Stevens, B.; Cotton, W.R. [Colorado State Univ., Fort Collins, CO (United States)] [Colorado State Univ., Fort Collins, CO (United States)

1996-12-15T23:59:59.000Z

151

Method and means of transmitting and receiving broad-band unipolar, ultrasonic pulses for ultrasonic inspection  

DOE Patents (OSTI)

The invention includes a means and method for transmitting and receiving broadband, unipolar, ultrasonic pulses for ultrasonic inspection. The method comprises generating a generally unipolar ultrasonic stress pulse from a low impedance voltage pulse transmitter along a low impedance electrical pathway to an ultrasonic transducer, and receiving the reflected echo of the pulse by the transducer, converting it to a voltage signal, and passing it through a high impedance electrical pathway to an output. The means utilizes electrical components according to the method. The means and method allow a single transducer to be used in a pulse/echo mode, and facilitates alternatingly transmitting and receiving the broadband, unipolar, ultrasonic pulses. 25 figures.

Thompson, D.O.; Hsu, D.K.

1993-12-14T23:59:59.000Z

152

Broadband squeezing of quantum noise in a Michelson interferometer with Twin-Signal-Recycling  

E-Print Network (OSTI)

Twin-Signal-Recycling (TSR) builds on the resonance doublet of two optically coupled cavities and efficiently enhances the sensitivity of an interferometer at a dedicated signal frequency. We report on the first experimental realization of a Twin-Signal-Recycling Michelson interferometer and also its broadband enhancement by squeezed light injection. The complete setup was stably locked and a broadband quantum noise reduction of the interferometers shot noise by a factor of up to 4\\,dB was demonstrated. The system was characterized by measuring its quantum noise spectra for several tunings of the TSR cavities. We found good agreement between the experimental results and numerical simulations.

Andr Thring; Christian Grf; Henning Vahlbruch; Moritz Mehmet; Karsten Danzmann; Roman Schnabel

2010-05-25T23:59:59.000Z

153

Buoyancy-Forced Downwelling in Boundary Currents MICHAEL A. SPALL  

E-Print Network (OSTI)

, such as the Greenland­Iceland­ Norwegian (GIN) Seas, Labrador Sea, Mediterranean Sea, Adriatic Sea, and Persian Gulf

154

Solar Energy, 2006, 80, 3, 361-367 SIMULATING METEOSAT-7 BROADBAND RADIANCES USING TWO  

E-Print Network (OSTI)

Solar Energy, 2006, 80, 3, 361-367 SIMULATING METEOSAT-7 BROADBAND RADIANCES USING TWO VISIBLE-00361360,version1-13Feb2009 Author manuscript, published in "Solar Energy 80, 3 (2006) 361-367" DOI : 10.1016/j.solener.2005.01.012 #12;Solar Energy, 2006, 80, 3, 361-367 · Imet-7 the maximum irradiance

Paris-Sud XI, Université de

155

An Autonomous, Broadband, Multi-channel Neural Recording System for Freely Behaving Primates  

E-Print Network (OSTI)

. features, 2) their battery life or storage capacity is limited to a few hours or less for broadband behaving primates. In this paper we present a dual- channel, battery powered, neural recording system of advances, particularly in the field of neural prosthetics. However, current state of the art experimental

Shenoy, Krishna V.

156

Telecommunications Policy 28 (2004) 559578 Can broadband over powerline carrier (PLC) compete?  

E-Print Network (OSTI)

Telecommunications Policy 28 (2004) 559­578 Can broadband over powerline carrier (PLC) compete Abstract Powerline carrier (PLC) communications have been heralded by the FCC as the ``3rd wire'' to every on the United States). Results indicate that PLC does not appear to represent a major disruptive technology

157

Broadband precision wavelength meter based on a stepping FabryProt interferometer  

E-Print Network (OSTI)

Broadband precision wavelength meter based on a stepping Fabry­Pérot interferometer T. J. Scholl. INTRODUCTION Wavelength meters based on Michelson or Fizeau inter- ferometers have long been the standard a more general laser wavelength meter in which the FP ring pattern was employed to compare

Rehse, Steven J.

158

Author's personal copy Broadband flow-induced sound control using plasma actuators  

E-Print Network (OSTI)

ionization the plasma actuators generate weakly ionized atmospheric plasma that consists of charged particlesAuthor's personal copy Broadband flow-induced sound control using plasma actuators Xun Huang a Editor: L.G. Tham Available online 9 February 2010 a b s t r a c t Plasma actuators were used

Huang, Xun

159

Broadband Cable Access Networks: The HFC Plant, 3rd Ed edition  

Science Journals Connector (OSTI)

This book focuses on broadband distribution and systems architecture and concentrates on practical concepts that will allow the reader to do their own design, improvement, and troubleshooting work. The objective is to enhance the skill sets of a large ... Keywords: Data Transmission Systems, Networking

David Large; James Farmer

2008-10-01T23:59:59.000Z

160

Incorporation of nanovoids into metallic gratings for broadband plasmonic organic solar  

E-Print Network (OSTI)

Incorporation of nanovoids into metallic gratings for broadband plasmonic organic solar cells investigation and optimization of a newly proposed plasmonic organic solar cell geometry based. Kietzke, "Recent advances in organic solar cells," Adv. Optoelectron. 2007, 40285 (2007). 2. P. E. Shaw, A

Park, Namkyoo

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Multicore Surprises: Lessons Learned from Optimizing Sweep3D on the Cell Broadband Engine  

E-Print Network (OSTI)

Watson Research Center Yorktown Heights, NY 10598, USA mpp@us.ibm.com Abstract The Cell Broadband Engine, such as thread-level parallelism using several Synergistic Processing Elements, data streaming parallelism and Development Program for the Data Intensive Com- puting Initiative at Pacific Northwest National Laboratory

Kuzmanov, Georgi

162

IEEE COMMUNICATIONS MAGAZINE, SPECIAL ISSUE MULTIACCESS FOR BROADBAND WIRELESS 100 Wireless Bandwidth in the Making  

E-Print Network (OSTI)

IEEE COMMUNICATIONS MAGAZINE, SPECIAL ISSUE MULTIACCESS FOR BROADBAND WIRELESS 100 Wireless to approaching the information theoretic limits of wireless multiple­access channels. This article offers a brief review of those technologies and their promise to meet future demand for wireless data rate. Keywords

Verdú, Sergio

163

Advanced Design of Broadband Distributed Amplifier using a SiGe BiCMOS Technology  

E-Print Network (OSTI)

Advanced Design of Broadband Distributed Amplifier using a SiGe BiCMOS Technology Gye-An Lee distributed amplifier for optical communication applications using SiGe BiCMOS technology. The design of some techniques are needed at such high frequencies. Main obstacles in the design of a silicon- based distributed

De Flaviis, Franco

164

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources for  

E-Print Network (OSTI)

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources) microchannel waveguides with liquid cores containing fluorescent dyes, excited by incident light from an external halogen bulb. Simultaneous use of multiple fluorophores in a common solution, in a single L2 light

Prentiss, Mara

165

Ultrathin, high-efficiency, broad-band, omni-acceptance, organic solar cells enhanced by  

E-Print Network (OSTI)

: Three of central challenges in solar cells are high light coupling into solar cell, high light trappingUltrathin, high-efficiency, broad-band, omni- acceptance, organic solar cells enhanced by plasmonic and demonstration of a new ultra-thin high- efficiency organic solar cell (SC), termed "plasmonic cavity

166

Broadband CMOS-Compatible Silicon Photonic Electro-Optic Switch for Photonic Networks-on-Chip  

E-Print Network (OSTI)

-on-chip (NoCs) offer an attractive solution for bandwidth scalability with reduced power consumption reconfiguration [1]. Electro-optic control of these broadband switches enables a more scalable and energy signal between the through port and the drop port is accomplished with the detuning of the right cavity

Bergman, Keren

167

Graded index and randomly oriented core-shell silicon nanowires with broadband and wide angle antireflection for photovoltaic cell applications  

E-Print Network (OSTI)

Antireflection with broadband and wide angle properties is important for a wide range of applications on photovoltaic cells and display. The SiOx shell layer provides a natural antireflection from air to the Si core absorption layer. In this work, we have demonstrated the random core-shell silicon nanowires with both broadband (from 400nm to 900nm) and wide angle (from normal incidence to 60\\degree) antireflection characteristics within AM1.5 solar spectrum. The graded index structure from the randomly oriented core-shell (Air/SiOx/Si) nanowires may provide a potential avenue to realize a broadband and wide angle antireflection layer.

Pignalosa, P; Qiao, L; Tseng, M; Yi, Yasha

2011-01-01T23:59:59.000Z

168

Investigation of broadband over power line channel capacity of shipboard power system cables for ship communications networks  

E-Print Network (OSTI)

Broadband over Power Line (BPL) technology has garnered significant attention lately due to recent advancements in solid state technologies and channel coding schemes. The successful application of BPL technology for in-home automation...

Akinnikawe, Ayorinde

2009-05-15T23:59:59.000Z

169

Extending broadband past the urban fringe with wireless mesh : a strategic analysis with policy implications for Kenya's Universal Service Fund  

E-Print Network (OSTI)

As the competitive wholesale cost of bandwidth continues to plummet in Kenya, last-mile networks have become a bottleneck in the extension of affordable broadband outside major cities. In this work we explore the business ...

Berkoben, Keith A. (Keith Alexander)

2011-01-01T23:59:59.000Z

170

Optimization of nonbinary slanted surface-relief gratings as high-efficiency broadband couplers for light guides  

Science Journals Connector (OSTI)

We propose and investigate the use of slanted surface-relief gratings with nonbinary profiles as high-efficiency broadband couplers for light guides. First, a Chandezon-method-based...

Bai, Benfeng; Laukkanen, Janne; Kuittinen, Markku; Siitonen, Samuli

2010-01-01T23:59:59.000Z

171

Broadband extreme ultraviolet multilayer mirror for supercontinuum light at a photon energy of 35-65 eV  

Science Journals Connector (OSTI)

We have developed a broadband multilayer mirror for photon energies between 35 and 65 eV. This extreme ultraviolet (EUV) mirror has an almost flat reflectivity profile at normal...

Hatayama, Masatoshi; Takenaka, Hisataka; Gullikson, Eric M; Suda, Akira; Midorikawa, Katsumi

2009-01-01T23:59:59.000Z

172

Prospects of coherent control in turbid media: Bounds on focusing broadband laser pulses  

SciTech Connect

We study the prospects of controlling transmission of broadband and bichromatic laser pulses through turbid samples. The ability to focus transmitted broadband light is limited via both the scattering properties of the medium and the technical characteristics of the experimental setup. There are two time scales given by pulse stretching in the near- and far-field regions which define the maximum bandwidth of a pulse amenable to focusing. In the geometric-optics regime of wave propagation in the medium, a single setup can be optimal for focusing light at frequencies {omega} and n{omega} simultaneously, providing the basis for the 1+n coherent quantum control. Beyond the regime of geometric optics, we discuss a simple solution for the shaping, which provides the figure of merit for one's ability to simultaneously focus several transmission modes.

Shapiro, Evgeny A.; Drane, Thomas M. [Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1 (Canada); Milner, Valery [Department of Physics, The University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1 (Canada)

2011-11-15T23:59:59.000Z

173

Room temperature broadband terahertz gains in graphene heterostructures based on inter-layer radiative transitions  

SciTech Connect

We exploit inter-layer radiative transitions to provide gains to amplify terahertz waves in graphene heterostructures. This is achieved by properly doping graphene sheets and aligning their energy bands so that the processes of stimulated emissions can overwhelm absorptions. We derive an expression for the gain estimation and show the gain is insensitive to temperature variation. Moreover, the gain is broadband and can be strong enough to compensate the free carrier loss, indicating graphene based room temperature terahertz lasers are feasible.

Tang, Linlong [Key Laboratory of High Energy Density Physics and Technology, College of Physics and Technology, Sichuan University, Chengdu, 610064 (China); Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122 (China); Du, Jinglei, E-mail: dujl@scu.edu.cn [Key Laboratory of High Energy Density Physics and Technology, College of Physics and Technology, Sichuan University, Chengdu, 610064 (China); Shi, Haofei, E-mail: shi@cigit.ac.cn; Wei, Dongshan; Du, Chunlei, E-mail: cldu@cigit.ac.cn [Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122 (China)

2014-10-15T23:59:59.000Z

174

Efficiency Enhancement InGaP/GaAs Dual-junction Solar Cell by Broad-band and Omnidirectional Antireflection Nanorod Arrays  

Science Journals Connector (OSTI)

10% efficiency enhancement of the solar cell by Broad-band and Omnidirectional Antireflection Nanorod Arrays was demonstrated. The enhanced efficiency attributed to increased light...

Tsai, Min-An; Tseng, P C; Yu, Peichen; Chiu, C H; Kuo, Hao-Chung

175

BIASES AND UNCERTAINTIES IN PHYSICAL PARAMETER ESTIMATES OF LYMAN BREAK GALAXIES FROM BROADBAND PHOTOMETRY  

SciTech Connect

We investigate the biases and uncertainties in estimates of physical parameters of high-redshift Lyman break galaxies (LBGs), such as stellar mass, mean stellar population age, and star formation rate (SFR), obtained from broadband photometry. These biases arise from the simplifying assumptions often used in fitting the spectral energy distributions (SEDs). By combining {lambda}CDM hierarchical structure formation theory, semianalytic treatments of baryonic physics, and stellar population synthesis models, we construct model galaxy catalogs from which we select LBGs at redshifts z {approx} 3.4, 4.0, and 5.0. The broadband photometric SEDs of these model LBGs are then analyzed by fitting galaxy template SEDs derived from stellar population synthesis models with smoothly declining SFRs. We compare the statistical properties of LBGs' physical parameters-such as stellar mass, SFR, and stellar population age-as derived from the best-fit galaxy templates with the intrinsic values from the semianalytic model. We find some trends in these distributions: first, when the redshift is known, SED-fitting methods reproduce the input distributions of LBGs' stellar masses relatively well, with a minor tendency to underestimate the masses overall, but with substantial scatter. Second, there are large systematic biases in the distributions of best-fit SFRs and mean ages, in the sense that single-component SED-fitting methods underestimate SFRs and overestimate ages. We attribute these trends to the different star formation histories predicted by the semianalytic models and assumed in the galaxy templates used in SED-fitting procedure, and to the fact that light from the current generation of star formation can hide older generations of stars. These biases, which arise from the SED-fitting procedure, can significantly affect inferences about galaxy evolution from broadband photometry.

Lee, Seong-Kook; Idzi, Rafal [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686 (United States); Ferguson, Henry C.; Somerville, Rachel S.; Wiklind, Tommy [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Giavalisco, Mauro [Astronomy Department, University of Massachusetts, Amherst, MA 01003 (United States)], E-mail: joshua@pha.jhu.edu

2009-09-01T23:59:59.000Z

176

Broadband light absorption enhancement in polymer photovoltaics using metal nanowall gratings as transparent electrodes  

SciTech Connect

The authors investigate light absorption in organic solar cells in which indium tin oxide (ITO) is replaced by a new metallic architecture (grating) as a transparent electrode. Different from typical metal nanowire gratings, our gratings consist of metal nanowalls with nanoscale footprint and (sub)microscale height [Adv. Mater. 23, 2469 (2011)], thus ensuring high optical transmittance and electrical conductivity. Simulations reveal that a broadband and polarization-insensitive light absorption enhancement is achieved via two mechanisms, when such silver nanowall gratings are employed in P3HT:PCBM based solar cells. Overall absorption enhanced by ~23% compared to a reference cell with ITO electrode.

Ye, Zhuo; Chaudhary, Sumit; Kuang, Ping; Ho, Kai-Ming

2012-05-15T23:59:59.000Z

177

All-dielectric three-dimensional broadband Eaton lens with large refractive index range  

SciTech Connect

We proposed a method to realize three-dimensional (3D) gradient index (GRIN) devices requiring large refractive index (RI) range with broadband performance. By combining non-resonant GRIN woodpile photonic crystals structure in the metamaterial regime with a compound liquid medium, a wide RI range (16.32) was fulfilled flexibly. As a proof-of-principle for the low-loss and non-dispersive method, a 3D Eaton lens was designed and fabricated based on 3D printing process. Full-wave simulation and experiment validated its omnidirectional wave bending effects in a broad bandwidth covering Ku band (12?GHz18?GHz)

Yin, Ming; Yong Tian, Xiao, E-mail: leoxyt@mail.xjtu.edu.cn; Ling Wu, Ling; Chen Li, Di [State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049 (China)

2014-03-03T23:59:59.000Z

178

Tobin-DC  

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

Calculated Downwelling Longwave Calculated Downwelling Longwave Spectral Radiances at the SHEBA Ice Station: Prelude to an Arctic AERI/LBLRTM QME D. C. Tobin, R. O. Knuteson, and H. E. Revercomb Cooperative Institute for Meteorological Satellite Studies Space, Science, and Engineering Center University of Wisconsin Madison, Wisconsin Introduction We present comparisons of clear-sky observed and calculated downwelling radiances from the year-long Surface Heat Budget of the Arctic Ocean (SHEBA) experiment. These and expected similar compari- sons from the Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) site in Barrow, Alaska, are useful for assessing the accuracy of clear-sky forward model issues, particularly the far-infrared air-broadened water vapor continuum and the temperature dependence of the 8 µm to 12 µm

179

FAST Copper For Broadband Access Mung Chiang1, Jianwei Huang1, Dahai Xu1, Yung Yi1, Chee Wei Tan1, Raphael Cendrillon2  

E-Print Network (OSTI)

FAST Copper For Broadband Access Mung Chiang1, Jianwei Huang1, Dahai Xu1, Yung Yi1, Chee Wei Tan1 Abstract-- This is an overview of the ongoing FAST Copper project, which is aimed at substantial improvements in rate, reach, reliability, and quality in copper-last-mile broadband access through fiber

Yi, Yung

180

FERMI-LAT OBSERVATIONS AND A BROADBAND STUDY OF SUPERNOVA REMNANT CTB 109  

SciTech Connect

CTB 109 (G109.1-1.0) is a Galactic supernova remnant (SNR) with a hemispherical shell morphology in X-rays and in the radio band. In this work, we report the detection of {gamma}-ray emission coincident with CTB 109, using 37 months of data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. We study the broadband characteristics of the remnant using a model that includes hydrodynamics, efficient cosmic-ray (CR) acceleration, nonthermal emission, and a self-consistent calculation of the X-ray thermal emission. We find that the observations can be successfully fit with two distinct parameter sets, one where the {gamma}-ray emission is produced primarily by leptons accelerated at the SNR forward shock and the other where {gamma}-rays produced by forward shock accelerated CR ions dominate the high-energy emission. Consideration of thermal X-ray emission introduces a novel element to the broadband fitting process, and while it does not rule out either the leptonic or the hadronic scenarios, it constrains the parameter sets required by the model to fit the observations. Moreover, the model that best fits the thermal and nonthermal emission observations is an intermediate case, where both radiation from accelerated electrons and hadrons contribute almost equally to the {gamma}-ray flux observed.

Castro, Daniel [MIT-Kavli Center for Astrophysics and Space Research, 77 Massachusetts Avenue, Cambridge, MA 02139 (United States); Slane, Patrick; Patnaude, Daniel J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Ellison, Donald C. [Physics Department, North Carolina State University, Box 8202, Raleigh, NC 27695 (United States)

2012-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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181

BRIGHT BROADBAND AFTERGLOWS OF GRAVITATIONAL WAVE BURSTS FROM MERGERS OF BINARY NEUTRON STARS  

SciTech Connect

If double neutron star mergers leave behind a massive magnetar rather than a black hole, then a bright early afterglow can follow the gravitational wave burst (GWB) even if there is no short gamma-ray burst (SGRB)-GWB association or if there is an association but the SGRB does not beam toward Earth. Besides directly dissipating the proto-magnetar wind, as suggested by Zhang, here we suggest that the magnetar wind could push the ejecta launched during the merger process and, under certain conditions, would reach a relativistic speed. Such a magnetar-powered ejecta, when interacting with the ambient medium, would develop a bright broadband afterglow due to synchrotron radiation. We study this physical scenario in detail and present the predicted X-ray, optical, and radio light curves for a range of magnetar and ejecta parameters. We show that the X-ray and optical light curves usually peak around the magnetar spin-down timescale ({approx}10{sup 3}-10{sup 5} s), reaching brightnesses readily detectable by wide-field X-ray and optical telescopes, and remain detectable for an extended period. The radio afterglow peaks later, but is much brighter than the case without a magnetar energy injection. Therefore, such bright broadband afterglows, if detected and combined with GWBs in the future, would be a probe of massive millisecond magnetars and stiff equations of state for nuclear matter.

Gao He; Ding Xuan; Wu Xuefeng [Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China); Zhang Bing [Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154 (United States); Dai Zigao, E-mail: xfwu@pmo.ac.cn, E-mail: zhang@physics.unlv.edu, E-mail: dzg@nju.edu.cn [School of Astronomy and Space Science, Nanjing University, Nanjing 210093 (China)

2013-07-10T23:59:59.000Z

182

Investigating Broadband Variability of the TeV Blazar 1ES 1959+650  

E-Print Network (OSTI)

We summarize broadband observations of the TeV-emitting blazar 1ES 1959+650, including optical R-band observations by the robotic telescopes Super-LOTIS and iTelescope, UV observations by Swift UVOT, X-ray observations by the Swift X-ray Telescope (XRT), high-energy gamma-ray observations with the Fermi Large Area Telescope (LAT) and very-high-energy (VHE) gamma-ray observations by VERITAS above 315 GeV, all taken between 17 April 2012 and 1 June 2012 (MJD 56034 and 56079). The contemporaneous variability of the broadband spectral energy distribution is explored in the context of a simple synchrotron self Compton (SSC) model. In the SSC emission scenario, we find that the parameters required to represent the high state are significantly different than those in the low state. Motivated by possible evidence of gas in the vicinity of the blazar, we also investigate a reflected-emission model to describe the observed variability pattern. This model assumes that the non-thermal emission from the jet is reflected b...

Aliu, E; Arlen, T; Aune, T; Barnacka, A; Beilicke, M; Benbow, W; Berger, K; Bird, R; Bouvier, A; Buckley, J H; Bugaev, V; Cerruti, M; Chen, X; Ciupik, L; Collins-Hughes, E; Connolly, M P; Cui, W; Dumm, J; Eisch, J D; Falcone, A; Federici, S; Feng, Q; Finley, J P; Fleischhack, H; Fortin, P; Fortson, L; Furniss, A; Galante, N; Gillanders, G H; Griffin, S; Griffiths, S T; Grube, J; Gyuk, G; Hakansson, N; Hanna, D; Holder, J; Hughes, G; Humensky, T B; Johnson, C A; Kaaret, P; Kar, P; Kertzman, M; Khassen, Y; Kieda, D; Krawczynski, H; Krennrich, F; Lang, M J; Madhavan, A S; Majumdar, P; McArthur, S; McCann, A; Meagher, K; Millis, J; Moriarty, P; Mukherjee, R; Nelson, T; Nieto, D; de Bhroithe, A O'Faolain; Ong, R A; Otte, A N; Park, N; Perkins, J S; Pohl, M; Popkow, A; Prokoph, H; Quinn, J; Ragan, K; Rajotte, J; Reyes, L C; Reynolds, P T; Richards, G T; Roache, E; Sadun, A; Santander, M; Sembroski, G H; Shahinyan, K; Sheidaei, F; Smith, A W; Staszak, D; Telezhinsky, I; Theiling, M; Tyler, J; Varlotta, A; Vassiliev, V V; Vincent, S; Wakely, S P; Weekes, T C; Weinstein, A; Welsing, R; Wilhelm, A; Williams, D A; Zitzer, B; Bttcher, M; Fumagalli, M

2014-01-01T23:59:59.000Z

183

Bright broad-band afterglows of gravitational wave bursts from mergers of binary neutron stars  

E-Print Network (OSTI)

If double neutron star mergers leave behind a massive magnetar rather than a black hole, a bright early afterglow can follow the gravitational wave burst (GWB) even if there is no short gamma-ray burst (SGRB) - GWB association or there is an association but the SGRB does not beam towards earth. Besides directly dissipating the proto-magnetar wind as suggested by Zhang, we here suggest that the magnetar wind could push the ejecta launched during the merger process, and under certain conditions, would reach a relativistic speed. Such a magnetar-powered ejecta, when interacting with the ambient medium, would develop a bright broad-band afterglow due to synchrotron radiation. We study this physical scenario in detail, and present the predicted X-ray, optical and radio light curves for a range of magnetar and ejecta parameters. We show that the X-ray and optical lightcurves usually peak around the magnetar spindown time scale (10^3-10^5s), reaching brightness readily detectable by wide-field X-ray and optical telescopes, and remain detectable for an extended period. The radio afterglow peaks later, but is much brighter than the case without a magnetar energy injection. Therefore, such bright broad-band afterglows, if detected and combined with GWBs in the future, would be a probe of massive millisecond magnetars and stiff equation-of-state for nuclear matter.

He Gao; Xuan Ding; Xue-Feng Wu; Bing Zhang; Zi-Gao Dai

2013-01-03T23:59:59.000Z

184

Broadband Heating Rate Profile Project (BBHRP) - SGP 1bbhrpripbe1mcfarlane  

SciTech Connect

The objective of the ARM Broadband Heating Rate Profile (BBHRP) Project is to provide a structure for the comprehensive assessment of our ability to model atmospheric radiative transfer for all conditions. Required inputs to BBHRP include surface albedo and profiles of atmospheric state (temperature, humidity), gas concentrations, aerosol properties, and cloud properties. In the past year, the Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to combine all of the input properties needed for BBHRP into a single gridded input file. Additionally, an interface between the RIPBE input file and the RRTM was developed using the new ARM integrated software development environment (ISDE) and effort was put into developing quality control (qc) flags and provenance information on the BBHRP output files so that analysis of the output would be more straightforward. This new version of BBHRP, sgp1bbhrpripbeC1.c1, uses the RIPBE files as input to RRTM, and calculates broadband SW and LW fluxes and heating rates at 1-min resolution using the independent column approximation. The vertical resolution is 45 m in the lower and middle troposphere to match the input cloud properties, but is at coarser resolution in the upper atmosphere. Unlike previous versions, the vertical grid is the same for both clear-sky and cloudy-sky calculations.

Riihimaki, Laura; Shippert, Timothy

2014-11-05T23:59:59.000Z

185

Graphene based tunable fractal Hilbert curve array broadband radar absorbing screen for radar cross section reduction  

SciTech Connect

This paper proposes a new type of graphene based tunable radar absorbing screen. The absorbing screen consists of Hilbert curve metal strip array and chemical vapour deposition (CVD) graphene sheet. The graphene based screen is not only tunable when the chemical potential of the graphene changes, but also has broadband effective absorption. The absorption bandwidth is from 8.9GHz to 18.1GHz, ie., relative bandwidth of more than 68%, at chemical potential of 0eV, which is significantly wider than that if the graphene sheet had not been employed. As the chemical potential varies from 0 to 0.4eV, the central frequency of the screen can be tuned from 13.5GHz to 19.0GHz. In the proposed structure, Hilbert curve metal strip array was designed to provide multiple narrow band resonances, whereas the graphene sheet directly underneath the metal strip array provides tunability and averagely required surface resistance so to significantly extend the screen operation bandwidth by providing broadband impedance matching and absorption. In addition, the thickness of the screen has been optimized to achieve nearly the minimum thickness limitation for a nonmagnetic absorber. The working principle of this absorbing screen is studied in details, and performance under various incident angles is presented. This work extends applications of graphene into tunable microwave radar cross section (RCS) reduction applications.

Huang, Xianjun, E-mail: xianjun.huang@manchester.ac.uk [School of Electrical and Electronic Engineering, University of Manchester, Manchester M13 9PL (United Kingdom); College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China); Hu, Zhirun [School of Electrical and Electronic Engineering, University of Manchester, Manchester M13 9PL (United Kingdom); Liu, Peiguo [College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2014-11-15T23:59:59.000Z

186

Broadband Heating Rate Profile Project (BBHRP) - SGP 1bbhrpripbe1mcfarlane  

DOE Data Explorer (OSTI)

The objective of the ARM Broadband Heating Rate Profile (BBHRP) Project is to provide a structure for the comprehensive assessment of our ability to model atmospheric radiative transfer for all conditions. Required inputs to BBHRP include surface albedo and profiles of atmospheric state (temperature, humidity), gas concentrations, aerosol properties, and cloud properties. In the past year, the Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to combine all of the input properties needed for BBHRP into a single gridded input file. Additionally, an interface between the RIPBE input file and the RRTM was developed using the new ARM integrated software development environment (ISDE) and effort was put into developing quality control (qc) flags and provenance information on the BBHRP output files so that analysis of the output would be more straightforward. This new version of BBHRP, sgp1bbhrpripbeC1.c1, uses the RIPBE files as input to RRTM, and calculates broadband SW and LW fluxes and heating rates at 1-min resolution using the independent column approximation. The vertical resolution is 45 m in the lower and middle troposphere to match the input cloud properties, but is at coarser resolution in the upper atmosphere. Unlike previous versions, the vertical grid is the same for both clear-sky and cloudy-sky calculations.

Riihimaki, Laura; Shippert, Timothy

187

1  

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

the Estimation of Clear-Sky Upwelling the Estimation of Clear-Sky Upwelling Shortwave and Longwave C.N. Long Pacific Northwest National Laboratory Richland, Washington Introduction Previous work (Long and Ackerman 2000; Long 2004) has concentrated on estimating the downwelling clear-sky irradiances and calculating the effect of clouds on the downwelling radiative energy budget. However, cloud forcing is defined for the difference between clear- and cloudy-sky net radiation, which includes the upwelling components. Thus, if we are to estimate the surface radiative cloud forcing, the means must be developed to estimate what the upwelling shortwave and longwave irradiance would be if the clouds were not present. Estimating the upwelling longwave (LW) is particularly troublesome in

188

IEEE Wireless Communications August 200916 1536-1284/09/$25.00 2009 IEEE SERVICE-ORIENTED BROADBAND  

E-Print Network (OSTI)

SERVICE-ORIENTED BROADBAND WIRELESS NETWORK ARCHITECTURE INTRODUCTION With the advancement of wireless of vehic- ular networks service-oriented, and they are expected to provide clear customer benefits databases and provide correspond- ing services to customers. In service-oriented vehicular networks

Shen, Xuemin "Sherman"

189

Real-time imaging of the spatial distribution of rf-heating in NMR samples during broadband decoupling  

E-Print Network (OSTI)

by the temperature control system. Moreover, as the heating is spatially inhomogeneous, higher temperature increases of the numerical simulations. Since electric fields manifest themselves by rf-heating, the E-field distributionReal-time imaging of the spatial distribution of rf-heating in NMR samples during broadband

Wider, Gerhard

190

Modal analysis of the range evolution of broadband wavefields in the North Pacific Ocean: Low mode numbers  

E-Print Network (OSTI)

Modal analysis of the range evolution of broadband wavefields in the North Pacific Ocean: Low mode North Pacific Ocean are reported here. Transient wavefields in the 50­90 Hz band that were recorded numbers Ilya A. Udovydchenkova) Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic

Frandsen, Jannette B.

191

Recent Developments on the Broadband Heating Rate Profile Value-Added Product  

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

Recent Developments on the Recent Developments on the Broadband Heating Rate Profile Value-Added Product E. J. Mlawer, J. S. Delamere, and S. A. Clough Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts M. A. Miller and K. L. Johnson Brookhaven National Laboratory Upton, New York T. R. Shippert and C. N. Long Pacific Northwest National Laboratory Richland, Washington R. G. Ellingson Florida State University Tallahassee, Florida M. H. Zhang State University of New York - Stony Brook Albany, New York R. A. Ferrare National Aeronautics and Space Administration Langley Research Center Hampton, Virginia R. T. Cederwall and S. C. Xie Los Alamos National Laboratory Los Alamos, New Mexico J. A. Ogren National Oceanic and Atmospheric Administration

192

A Simple Empirical Equation to Calculate Cloud Optical Thickness from Shortwave Broadband Measurements  

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

Simple Empirical Equation to Calculate Cloud Optical Simple Empirical Equation to Calculate Cloud Optical Thickness from Shortwave Broadband Measurements J. C. Barnard and C. N. Long Pacific Northwest National Laboratory Richland, Washington Introduction Observational studies of shortwave cloud optical thickness, c , play an important role in determining how clouds affect climate. Accordingly, considerable effort has been, and continues to be expended to characterize the spatial and temporal distribution of c over the globe. This effort involves satellite and ground-based measurements that infer c from measurements of the reflection or transmission of solar radiation. Transmitted solar radiation forms the basis of several important algorithms designed to calculate c ; these algorithms use either spectral irradiances (Min and Harrison 1996; henceforth referred

193

Broad-band Spectral Properties of Accreting X-ray Binary Pulsars  

E-Print Network (OSTI)

Broad-band spectra of accreting X-ray binary pulsars can be fit by a phenomenological model composed by a power law with a high energy rollover above 10 keV, plus a blackbody component with a temperature of few hundred eV. While, at least qualitatively, the hard tail can be explained in terms of (inverse) Compton scattering, the origin of the soft component cannot find a unique explanation. Recently a qualitative picture able to explain the overall broad band-spectrum of luminous X-ray pulsars was carried out by taking into account the effect of bulk Comptonization in the accretion column. After a review on these recent theoretical developments, I will present a case study of how different modelization of the continuum affect broad features, in particular the cyclotron resonance features in Vela X-1.

Mauro Orlandini

2005-10-10T23:59:59.000Z

194

Cascading metallic gratings for broadband absorption enhancement in ultrathin plasmonic solar cells  

SciTech Connect

The incorporation of plasmonic nanostructures in the thin-film solar cells (TFSCs) is a promising route to harvest light into the nanoscale active layer. However, the light trapping scheme based on the plasmonic effects intrinsically presents narrow-band resonant enhancement of light absorption. Here we demonstrate that by cascading metal nanogratings with different sizes atop the TFSCs, broadband absorption enhancement can be realized by simultaneously exciting multiple localized surface plasmon resonances and inducing strong coupling between the plasmonic modes and photonic modes. As a proof of concept, we demonstrate of 66.5% in the photocurrent in an ultrathin amorphous silicon TFSC with two-dimensional cascaded gratings over the reference cell without gratings.

Wen, Long; Sun, Fuhe [Key Laboratory of Nanodevices and Applications-CAS and Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123 (China); Chen, Qin, E-mail: qchen2012@sinano.ac.cn [Key Laboratory of Nanodevices and Applications-CAS and Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123 (China); Peking University Shenzhen SOC Key Laboratory, PKU-HKUST Shenzhen-Hong Kong Institute, Hi-Tech Industrial Park South, Shenzhen 518057 (China)

2014-04-14T23:59:59.000Z

195

In situ broadband cryogenic calibration for two-port superconducting microwave resonators  

SciTech Connect

We introduce an improved microwave calibration method for use in a cryogenic environment, based on a traditional three-standard calibration, the Thru-Reflect-Line (TRL) calibration. The modified calibration method takes advantage of additional information from multiple measurements of an ensemble of realizations of a superconducting resonator, as a new pseudo-Open standard, to correct errors in the TRL calibration. We also demonstrate an experimental realization of this in situ broadband cryogenic calibration system utilizing cryogenic switches. All calibration measurements are done in the same thermal cycle as the measurement of the resonator (requiring only an additional 20 min), thus avoiding 4 additional thermal cycles for traditional TRL calibration (which would require an additional 12 days). The experimental measurements on a wave-chaotic microwave billiard verify that the new method significantly improves the measured scattering matrix of a high-quality-factor superconducting resonator.

Yeh, Jen-Hao; Anlage, Steven M. [Electrical and Computer Engineering Department, University of Maryland, College Park, Maryland 20742-3285 (United States); CNAM, Physics Department, University of Maryland, College Park, Maryland 20742-4111 (United States)

2013-03-15T23:59:59.000Z

196

Design of a High Power Continuous Source of Broadband Down-Converted Light  

E-Print Network (OSTI)

We present the design and experimental proof of principle of a low threshold optical parametric oscillator (OPO) that continuously oscillates over a large bandwidth allowed by phase matching. The large oscillation bandwidth is achieved with a selective two-photon loss that suppresses the inherent mode competition, which tends to narrow the bandwidth in conventional OPOs. Our design performs pairwise mode-locking of many frequency pairs, in direct equivalence to passive mode-locking of ultrashort pulsed lasers. The ability to obtain high powers of continuous \\textit{and} broadband down-converted light enables the optimal exploitation of the correlations within the down-converted spectrum, thereby strongly affecting two-photon interactions even at classically high power levels, and opening new venues for applications such as two-photon spectroscopy and microscopy and optical spread spectrum communication.

Avi Pe'er; Yaron Silberberg; Barak Dayan; Asher A. Friesem

2006-08-29T23:59:59.000Z

197

Broadband, stable and highly coherent supercontinuum generation at telecommunication wavelengths in an hydrogenated amorphous silicon waveguide  

E-Print Network (OSTI)

Hydrogenated amorphous silicon (a:Si-H) has recently been recognized as a highly nonlinear CMOS compatible photonic platform. We experimentally demonstrate the generation of a supercontinuum (SC) spanning over 500 nm in a-Si:H photonic wire waveguide at telecommunication wavelengths using femtosecond input pulse with energy lower than 5 pJ. Numerical modeling of pulse propagation in the waveguide, based on the experimentally characterized dispersion profile, shows that the supercontinuum is the result of soliton fission and dispersive wave generation. It is demonstrated that the SC is highly coherent and that the waveguides do not suffer from material degradation under femtosecond pulse illumination. Finally, a direct comparison of SC generation in c-Si and a-Si:H waveguides confirms the higher performances of a-Si:H over c-Si for broadband low power SC generation at telecommunication wavelengths.

Leo, F; Kuyken, B; Roelkens, G; Gorza, S -P

2014-01-01T23:59:59.000Z

198

AARP Reply Comments to: DEPARTMENT OF ENERGY Implementing the National Broadband  

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

AARP Reply Comments to: AARP Reply Comments to: DEPARTMENT OF ENERGY Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy David Certner Legislative Counsel and Legislative Policy Director AARP Government Relations and Advocacy August 6, 2010 2 AARP submits the following comments on consumers and smart grid issues in reply to initial comments of a number of entities to the Request for Information (Request or RFI) on access to data in the smart grid space, published by the Department of Energy (DOE) on May 11, 2010. About AARP Founded in 1958, AARP is a nonprofit, nonpartisan membership organization that helps people age 50 and over improve the quality of their lives. AARP has offices in all 50 states, the District

199

BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal  

E-Print Network (OSTI)

The redshifted 21cm line of neutral hydrogen (HI), potentially observable at low radio frequencies (~50-200 MHz), should be a powerful probe of the physical conditions of the inter-galactic medium during Cosmic Dawn and the Epoch of Reionisation (EoR). The sky-averaged HI signal is expected to be extremely weak (~100 mK) in comparison to the foreground of up to 10000 K at the lowest frequencies of interest. The detection of such a weak signal requires an extremely stable, well characterised system and a good understanding of the foregrounds. Development of a nearly perfectly (~mK accuracy) calibrated total power radiometer system is essential for this type of experiment. We present the BIGHORNS (Broadband Instrument for Global HydrOgen ReioNisation Signal) experiment which was designed and built to detect the sky-averaged HI signal from the EoR at low radio frequencies. The BIGHORNS system is a mobile total power radiometer, which can be deployed in any remote location in order to collect radio-interference (...

Sokolowski, M; Wayth, R B; Tingay, S J; Clarke, N; Roberts, P; Waterson, M; Ekers, R D; Hall, P; Lewis, M; Mossammaparast, M; Padhi, S; Schlagenhaufer, F; Sutinjo, A; Tickner, J

2015-01-01T23:59:59.000Z

200

A broadband microwave Corbino spectrometer at $^3$He temperatures and high magnetic fields  

E-Print Network (OSTI)

We present the technical details of a broadband microwave spectrometer for measuring the complex conductance of thin films covering the range from 50 MHz up to 16 GHz in the temperature range 300 mK to 6 K and at applied magnetic fields up to 8 Tesla. We measure the complex reflection from a sample terminating a coaxial transmission line and calibrate the signals with three standards with known reflection coefficients. Thermal isolation of the heat load from the inner conductor is accomplished by including a section of NbTi superconducting cable (transition temperature around 8 $-$ 9 K) and hermetic seal glass bead adapters. This enables us to stabilize the base temperature of the sample stage at 300 mK. However, the inclusion of this superconducting cable complicates the calibration procedure. We document the effects of the superconducting cable on our calibration procedure and the effects of applied magnetic fields and how we control the temperature with great repeatability for each measurement. We have suc...

Liu, Wei; Armitage, N P

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Near-resonance enhanced O2 detection for dual-broadband pure rotational coherent anti-Stokes Raman scattering with an ultraviolet-visible setup at 266 nm  

SciTech Connect

Broadband and dual-broadband coherent anti-Stokes Raman scattering (CARS) are widely established tools for nonintrusive gas diagnostics. Up to now the investigations have been mainly performed for electronic nonresonant conditions of the gas species of interest. We report on the enhancement of the O2-N2 detection limit of dual-broadband pure rotational CARS by shifting the wavelength of the narrowband pump laser from the commonly used 532-266 nm. This enhancement is caused when the Schumann-Runge absorption band is approached near 176 nm. The principal concept of this experiment, i.e., covering the Raman resonance with a single- or dual-broadband combination of lasers in the visible range and moving only the narrowband probe laser near or directly into electronic resonant conditions in the UV range, should also be applicable to broadband CARS experiments to directly exploit electronic resonance effects for the purpose of single-shot concentration measurements of minority species. To quantify the enhancement in O2 sensitivity, comparative measurements at both a 266 and a 532 nm narrowband pump laser wavelength are presented, employing a 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyram (DCM) dye laser as a broadband laser source at 635 nm. An increase of approximately 13% in the ratio of the rotational CARS cross sections of O2 and N2 was obtained. The broad spectral width of the CARS excitation profile was approximately equal for both setups. Further enhancement should be achievable by shifting the narrowband pump laser closer toward 176 nm, for example, with a frequency-doubled optical parametric oscillator or an excimer laser. The principal concept of this experiment should also be applicable to broadband CARS experiments to directly exploit electronic resonance effects of the narrowband pump laser with electronic transitions of minority species for the purpose of single-shot concentration measurements of those species.

Schenk, Martin; Seeger, Thomas; Leipertz, Alfred

2005-07-01T23:59:59.000Z

202

THE BARYON ACOUSTIC OSCILLATION BROADBAND AND BROAD-BEAM ARRAY: DESIGN OVERVIEW AND SENSITIVITY FORECASTS  

SciTech Connect

This work describes a new instrument optimized for a detection of the neutral hydrogen 21 cm power spectrum between redshifts of 0.5 and 1.5: the Baryon Acoustic Oscillation Broadband and Broad-beam (BAOBAB) array. BAOBAB will build on the efforts of a first generation of 21 cm experiments that are targeting a detection of the signal from the Epoch of Reionization at z {approx} 10. At z {approx} 1, the emission from neutral hydrogen in self-shielded overdense halos also presents an accessible signal, since the dominant, synchrotron foreground emission is considerably fainter than at redshift 10. The principle science driver for these observations are baryon acoustic oscillations in the matter power spectrum which have the potential to act as a standard ruler and constrain the nature of dark energy. BAOBAB will fully correlate dual-polarization antenna tiles over the 600-900 MHz band with a frequency resolution of 300 kHz and a system temperature of 50 K. The number of antennas will grow in staged deployments, and reconfigurations of the array will allow for both traditional imaging and high power spectrum sensitivity operations. We present calculations of the power spectrum sensitivity for various array sizes, with a 35 element array measuring the cosmic neutral hydrogen fraction as a function of redshift, and a 132 element system detecting the BAO features in the power spectrum, yielding a 1.8% error on the z {approx} 1 distance scale, and, in turn, significant improvements to constraints on the dark energy equation of state over an unprecedented range of redshifts from {approx}0.5 to 1.5.

Pober, Jonathan C.; Parsons, Aaron R.; McQuinn, Matthew; Ali, Zaki [Astronomy Department, University of California, Berkeley, CA (United States); DeBoer, David R. [Radio Astronomy Laboratory, University of California, Berkeley, CA (United States); McDonald, Patrick [Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA (United States); Aguirre, James E. [Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA (United States); Bradley, Richard F. [Astronomy Department and Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA (United States); Chang, Tzu-Ching [Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan (China); Morales, Miguel F. [Department of Physics, University of Washington, Seattle, WA (United States)

2013-03-15T23:59:59.000Z

203

Broadband three-photon near-infrared quantum cutting in Tm{sup 3+} singly doped YVO{sub 4}  

SciTech Connect

An efficient three-photon near-infrared (NIR) quantum cutting (QC) is reported in Tm{sup 3+} singly doped YVO{sub 4} polycrystalline phosphors, where an optimized content of Tm{sup 3+} is determined to be 1.0?mol. %. Upon the absorption of a visible photon around 473?nm, three NIR photons emitting at 1180, 1479, and 1800?nm can be obtained efficiently by the sequential three-step radiative transitions of Tm{sup 3+}. The underlying mechanisms are analyzed in terms of the steady and dynamic fluorescence spectra measurements. Internal quantum yield is calculated to be 161.8% as a theoretical value when luminescence quenching due to defect species can be overcome. In addition, the broadband ultraviolet (UV)-excited [VO{sub 4}]{sup 3?} can strongly sensitize the {sup 1}G{sub 4} level of Tm{sup 3+} in the wavelength range likely from 250 to 360?nm, greatly increasing the UV photo-response and NIR fluorescent intensity of Tm{sup 3+}. The further development of this broadband three-photon NIR QC material would explore the new route to improve the photo-response of novel photoelectronic devices, particularly in 250360?nm.

Wang, Y. Z.; Yu, D. C.; Lin, H. H.; Ye, S.; Peng, M. Y.; Zhang, Q. Y., E-mail: qyzhang@scut.edu.cn [State Key Laboratory of Luminescence Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641 (China)

2013-11-28T23:59:59.000Z

204

Research Highlight  

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

ARM Program Research Improves Longwave Radiative Transfer Models ARM Program Research Improves Longwave Radiative Transfer Models Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Radiative Processes Journal Reference: The QME AERI LBLRTM: A closure experiment for downwelling high spectral resolution infrared radiance. D.D. Turner, D.C. Tobin, S.A. Clough, P.D. Brown, R.G. Ellingson, E.J. Mlawer, R.O. Knuteson, H.E. Revercomb, T.R. Shippert, and W.L. Smith. 2004. Journal of Atmospheric Science, 61, 2657-2675. Top panels: Examples of downwelling infrared radiance observed by the AERI for two different clear sky cases with different amounts of water vapor. Bottom panels: Differences between the AERI observations and calculations

205

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 27, NO. 2, FEBRUARY 2009 117 Capacity and Delay of Hybrid Wireless Broadband  

E-Print Network (OSTI)

to the infrastructure mode traffics. We then investigate the delay in hybrid wireless networks. We find that the average and Delay of Hybrid Wireless Broadband Access Networks Pan Li, Chi Zhang, Student Member, IEEE, and Yuguang goes large. In this paper, we propose a hybrid wireless network, which is an integrated wireless

Latchman, Haniph A.

206

Post-seismic relaxation following the 2009 April 6, l'Aquila (Italy), earthquake revealed by the mass position of a broad-band seismometer  

Science Journals Connector (OSTI)

......would be if no restoring force were exerted by the feedback...3 Block diagram of a force-balance broad-band...6 Conclusions Most force-balance broad-band...actual final dislocation-fundamental for evidencing possibly...Seismometry, inInternational Handbook of Earthquake and Engineering......

Nicola Alessandro Pino

2012-06-01T23:59:59.000Z

207

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

208

High-performance broadband optical coatings on InGaN/GaN solar cells for multijunction device integration  

SciTech Connect

We demonstrate InGaN/GaN multiple quantum well solar cells grown by metalorganic chemical vapor deposition on a bulk (0001) substrate with high-performance broadband optical coatings to improve light absorption. A front-side anti-reflective coating and a back-side dichroic mirror were designed to minimize front surface reflections across a broad spectral range and maximize rear surface reflections only in the spectral range absorbed by the InGaN, making the cells suitable for multijunction solar cell integration. Application of optical coatings increased the peak external quantum efficiency by 56% (relative) and conversion efficiency by 37.5% (relative) under 1 sun AM0 equivalent illumination.

Young, N. G., E-mail: ngyoung@engineering.ucsb.edu; Farrell, R. M.; Iza, M.; Speck, J. S. [Materials Department, University of California, Santa Barbara, California 93106 (United States); Perl, E. E.; Keller, S. [Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106 (United States); Bowers, J. E.; Nakamura, S.; DenBaars, S. P. [Materials Department, University of California, Santa Barbara, California 93106 (United States); Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106 (United States)

2014-04-21T23:59:59.000Z

209

Comparison of M46 broad-band visible data with ELF data from the Sprites `96 campaign  

SciTech Connect

Lightning data, recorded with satellite optical sensors, are compared with extremely low frequency (ELF) and Schumann resonance (SR) data from the Sprites `96 Campaign. The satellite data are broad-band visible events recorded by the M46 satellite payload. Full width at half maximum and optical tail durations from the satellite data are compared with ELF slow tail features and Schumann resonance spectral color. In addition, continuing current estimates were computed for several positive cloud-to-ground (PCG) strokes. These estimates were derived using relative optical intensities from the satellite data and a peak current measurement from National Lightning Detection Network (NLDN) data. This assessment of M46 lightning data supports correlations between visible and ELF signatures. More data must be studied for compelling proof.

Mitchell, E.A.

1997-10-01T23:59:59.000Z

210

Black Silicon Solar Thin-film Microcells Integrating Top Nanocone Structures for Broadband and Omnidirectional Light-Trapping  

E-Print Network (OSTI)

Recently developed classes of monocrystalline silicon solar microcells (u-cell) can be assembled into modules with characteristics (i.e., mechanically flexible forms, compact concentrator designs, and high-voltage outputs) that would be impossible to achieve using conventional, wafer-based approaches. In this paper, we describe a highly dense, uniform and non-periodic nanocone forest structure of black silicon (bSi) created on optically-thin (30 um) u-cells for broadband and omnidirectional light-trapping with a lithography-free and high-throughput plasma texturizing process. With optimized plasma etching conditions and a silicon nitride passivation layer, black silicon u-cells, when embedded in a polymer waveguiding layer, display dramatic increases of as much as 65.7% in short circuit current, as compared to a bare silicon device. The conversion efficiency increases from 8% to 11.5% with a small drop in open circuit voltage and fill factor.

Xu, Zhida; Brueckner, Eric P; Li, Lanfang; Jiang, Jing; Nuzzo, Ralph G; Liu, Gang L

2014-01-01T23:59:59.000Z

211

Efficient Cherenkov emission of broadband terahertz radiation from an ultrashort laser pulse in a sandwich structure with nonlinear core  

SciTech Connect

A scheme for efficient generation of broadband terahertz radiation by a femtosecond laser pulse propagating in a planar sandwichlike structure is proposed. The structure consists of a thin nonlinear core cladded with prisms made of a material with low terahertz absorption. The focused into a line laser pulse propagates in the core as a leaky or waveguide mode and emits Cherenkov wedge of terahertz waves in the cladding. We developed a theory that describes terahertz generation in such a structure and calculated spatial distribution of the generated terahertz field, its energy spectrum and optical-to-terahertz conversion efficiency. The developed theory predicts the conversion efficiency of up to several percent in a 1 cm long and 1 cm wide Si-LiNbO{sub 3}-Si sandwich structure with a 20 {mu}m thick nonlinear layer pumped by 8.5 {mu}J Ti:sapphire laser with pulse duration of 100 fs.

Bodrov, S. B. [Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950 (Russian Federation); University of Nizhny Novgorod, Nizhny Novgorod 603950 (Russian Federation); Bakunov, M. I. [University of Nizhny Novgorod, Nizhny Novgorod 603950 (Russian Federation); Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950 (Russian Federation); Hangyo, M. [Laser Terahertz Division, Institute of Laser Engineering, Osaka University, Osaka (Japan)

2008-11-01T23:59:59.000Z

212

Quantitative broadband absorption and scattering spectroscopy in turbid media by combined frequency-domain and steady state methodologies  

DOE Patents (OSTI)

A technique for measuring broadband near-infrared absorption spectra of turbid media that uses a combination of frequency-domain and steady-state reflectance methods. Most of the wavelength coverage is provided by a white-light steady-state measurement, whereas the frequency-domain data are acquired at a few selected wavelengths. Coefficients of absorption and reduced scattering derived from the frequency-domain data are used to calibrate the intensity of the steady-state measurements and to determine the reduced scattering coefficient at all wavelengths in the spectral window of interest. The absorption coefficient spectrum is determined by comparing the steady-state reflectance values with the predictions of diffusion theory, wavelength by wavelength. Absorption spectra of a turbid phantom and of human breast tissue in vivo, derived with the combined frequency-domain and steady-state technique, agree well with expected reference values.

Tromberg, Bruce J. (Irvine, CA); Berger, Andrew J. (Rochester, NY); Cerussi, Albert E. (Lake Forest, CA); Bevilacqua, Frederic (Costa Mesa, CA); Jakubowski, Dorota (Irvine, CA)

2008-09-23T23:59:59.000Z

213

Molecular-like Ag clusters sensitized near-infrared down-conversion luminescence in oxyfluoride glasses for broadband spectral modification  

SciTech Connect

Molecular-like Ag clusters sized at 14 nm have been stabilized in Pb/Cd-free oxyfluoride glasses, showing broadband excitation/emission characteristics and unique wavelength-dependent luminescent performance with a maximal quantum yield of 26.9%. It was experimentally demonstrated that an energy transfer route of Ag clusters ? Tb{sup 3+} ? Yb{sup 3+} occurs in Ag{sup +}/Tb{sup 3+}/Yb{sup 3+} tri-doped sample, wherein Ag clusters act as sensitizers for near-infrared down-conversion spectral modification. Hopefully, the proposed strategy that noble metal clusters being applied for harvesting solar radiation may potentially solve the sticky problems of the narrow excitation bandwidth and the low excitation efficiency in rare earth ions doped down-conversion materials.

Lin, Hang; Chen, Daqin; Yu, Yunlong; Zhang, Rui; Wang, Yuansheng [State Key Lab of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)] [State Key Lab of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)

2013-08-26T23:59:59.000Z

214

THE ESTIMATION OF STAR FORMATION RATES AND STELLAR POPULATION AGES OF HIGH-REDSHIFT GALAXIES FROM BROADBAND PHOTOMETRY  

SciTech Connect

We explore methods to improve the estimates of star formation rates and mean stellar population ages from broadband photometry of high-redshift star-forming galaxies. We use synthetic spectral templates with a variety of simple parametric star formation histories to fit broadband spectral energy distributions. These parametric models are used to infer ages, star formation rates, and stellar masses for a mock data set drawn from a hierarchical semi-analytic model of galaxy evolution. Traditional parametric models generally assume an exponentially declining rate of star formation after an initial instantaneous rise. Our results show that star formation histories with a much more gradual rise in the star formation rate are likely to be better templates, and are likely to give better overall estimates of the age distribution and star formation rate distribution of Lyman break galaxies (LBGs). For B- and V-dropouts, we find the best simple parametric model to be one where the star formation rate increases linearly with time. The exponentially declining model overpredicts the age by 100% and 120% for B- and V-dropouts, on average, while for a linearly increasing model, the age is overpredicted by 9% and 16%, respectively. Similarly, the exponential model underpredicts star formation rates by 56% and 60%, while the linearly increasing model underpredicts by 15% and 22%, respectively. For U-dropouts, the models where the star formation rate has a peak (near z {approx} 3) provide the best match for age-overprediction is reduced from 110% to 26%-and star formation rate-underprediction is reduced from 58% to 22%. We classify different types of star formation histories in the semi-analytic models and show how the biases behave for the different classes. We also provide two-band calibration formulae for stellar mass and star formation rate estimations.

Lee, Seong-Kook [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686 (United States); Ferguson, Henry C.; Somerville, Rachel S.; Wiklind, Tommy [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Giavalisco, Mauro, E-mail: joshua@pha.jhu.ed [Astronomy Department, University of Massachusetts, Amherst, MA 01003 (United States)

2010-12-20T23:59:59.000Z

215

Ground motion modeling of Hayward fault scenario earthquakes II:Simulation of long-period and broadband ground motions  

SciTech Connect

We simulate long-period (T > 1.0-2.0 s) and broadband (T > 0.1 s) ground motions for 39 scenarios earthquakes (Mw 6.7-7.2) involving the Hayward, Calaveras, and Rodgers Creek faults. For rupture on the Hayward fault we consider the effects of creep on coseismic slip using two different approaches, both of which reduce the ground motions compared with neglecting the influence of creep. Nevertheless, the scenario earthquakes generate strong shaking throughout the San Francisco Bay area with about 50% of the urban area experiencing MMI VII or greater for the magnitude 7.0 scenario events. Long-period simulations of the 2007 Mw 4.18 Oakland and 2007 Mw 4.5 Alum Rock earthquakes show that the USGS Bay Area Velocity Model version 08.3.0 permits simulation of the amplitude and duration of shaking throughout the San Francisco Bay area, with the greatest accuracy in the Santa Clara Valley (San Jose area). The ground motions exhibit a strong sensitivity to the rupture length (or magnitude), hypocenter (or rupture directivity), and slip distribution. The ground motions display a much weaker sensitivity to the rise time and rupture speed. Peak velocities, peak accelerations, and spectral accelerations from the synthetic broadband ground motions are, on average, slightly higher than the Next Generation Attenuation (NGA) ground-motion prediction equations. We attribute at least some of this difference to the relatively narrow width of the Hayward fault ruptures. The simulations suggest that the Spudich and Chiou (2008) directivity corrections to the NGA relations could be improved by including a dependence on the rupture speed and increasing the areal extent of rupture directivity with period. The simulations also indicate that the NGA relations may under-predict amplification in shallow sedimentary basins.

Aagaard, B T; Graves, R W; Rodgers, A; Brocher, T M; Simpson, R W; Dreger, D; Petersson, N A; Larsen, S C; Ma, S; Jachens, R C

2009-11-04T23:59:59.000Z

216

CONTAMINATION OF BROADBAND PHOTOMETRY BY NEBULAR EMISSION IN HIGH-REDSHIFT GALAXIES: INVESTIGATIONS WITH KECK'S MOSFIRE NEAR-INFRARED SPECTROGRAPH  

SciTech Connect

Earlier work has raised the potential importance of nebular emission in the derivation of the physical characteristics of high-redshift Lyman break galaxies. Within certain redshift ranges, and especially at z ? 6-7, such lines may be strong enough to reduce estimates of the stellar masses and ages of galaxies compared with those derived assuming the broadband photometry represents stellar light alone. To test this hypothesis at the highest redshifts where such lines can be probed with ground-based facilities, we examine the near-infrared spectra of a representative sample of 28 3.0 < z < 3.8 Lyman break galaxies using the newly commissioned MOSFIRE near-infrared spectrograph at the Keck I telescope. We use these data to derive the rest-frame equivalent widths (EWs) of [O III] emission and show that these are comparable with estimates derived using the spectral energy distribution (SED) fitting technique introduced for sources of known redshift by Stark et al. Although our current sample is modest, its [O III] EW distribution is consistent with that inferred for H? based on SED fitting of Stark et al.'s larger sample of 3.8 < z < 5 galaxies. For a subset of survey galaxies, we use the combination of optical and near-infrared spectroscopy to quantify kinematics of outflows in z ? 3.5 star-forming galaxies and discuss the implications for reionization measurements. The trends we uncover underline the dangers of relying purely on broadband photometry to estimate the physical properties of high-redshift galaxies and emphasize the important role of diagnostic spectroscopy.

Schenker, Matthew A; Ellis, Richard S; Konidaris, Nick P [Department of Astrophysics, California Institute of Technology, MC 249-17, Pasadena, CA 91125 (United States); Stark, Daniel P, E-mail: schenker@astro.caltech.edu [Department of Astronomy and Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States)

2013-11-01T23:59:59.000Z

217

ARM08_khaiyer_final.ppt  

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

Improvement of Broadband Shortwave and Longwave Fluxes over ARM Domains Improvement of Broadband Shortwave and Longwave Fluxes over ARM Domains M. M. Khaiyer, M.L. Nordeen, R. Palikonda, Y. Yi Science Systems and Applications Inc, Hampton, VA D. R. Doelling, P. Minnis NASA Langley Research Center, Hampton, VA 1.Introduction * As part of a cloud and radiation product dataset, the NASA Langley Cloud Group provides broadband (BB) shortwave (SW) and longwave (LW) fluxes derived from geostationary operational environmental satellite (GOES) narrowband (NB) radiances - Available from May 1998 to August 2005 * Narrow-to-broadband (NB-BB) conversion technique based on regressing coincident co-located 1° averaged CERES BB and GOES NB fluxes. Regression coefficients unique for each domain (SGP, MASRAD, etc). Currently for GOES8 (Apr00-Mar03), there is only a single NB-BB fit

218

ARM - Publications: Science Team Meeting Documents: Using ARM data to  

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

Using ARM data to evaluate the dependence of surface downward longwave Using ARM data to evaluate the dependence of surface downward longwave radiation on near-surface temperature and water vapour path, in both ARM observations and the Met Office NWP model. Henderson, Peter Environmental Systems Science Centre Slingo, Anthony Environmental Systems Science Centre In this work, we continue our comparisons between ARM data and simulations from the UK Met Office Numerical Weather Prediction (NWP) model. The present analysis focuses on the variables that control the downwelling longwave radiation at the surface, in particular the column water vapour and near-surface temperature. Water vapour is both a source and a sink of latent heat, is an active modulator of atmospheric radiative transfer and therefore influences both the general circulation and the global energy

219

ARM - Publications: Science Team Meeting Documents: Determination of the  

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

Determination of the Arctic Indirect Aerosol Effect from AERI and Determination of the Arctic Indirect Aerosol Effect from AERI and Multispectral Radiometer Data Lubin, Dan University of California, San Diego Vogelmann, Andrew Brookhaven National Laboratory We have detected and quantified the aerosol indirect radiative effect in the longwave by identifying the spectral signatures of liquid water clouds having smaller droplet effective droplet radius using AERI. Statistically significant differences in the longwave emission spectra appear between low CN and high CN cases as measured in NOAA CMDL aerosol number concentration data at Barrow, Alaska. An independent verification of this indirect effect detection is provided by downwelling longwave flux measurements from the NSA pyrgeometers, which show consistently larger fluxes in the high CN

220

Research Highlight  

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

Continuous Clear-Sky Longwave from Surface Measurements Continuous Clear-Sky Longwave from Surface Measurements Download a printable PDF Submitter: Long, C. N., Pacific Northwest National Laboratory Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Long, CN, and DD Turner. 2008. "A method for continuous estimation of clear-sky downwelling longwave radiative flux developed using ARM surface measurements." Journal of Geophysical Research 113, D18206, doi:10.1029/2008JD009936. Comparison of clear-sky RT model calculations (black) and our estimates (gray) with detected LW effective clear-sky measurements from the ACRF SGP site from 1 March through 31 May 2003, showing that our LW estimates do as well as detailed model calculations in comparison with actual LW

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221

Broadband carbon monoxide laser system operating in the wavelength range of 2.5 - 8.3 {mu}m  

SciTech Connect

A two-cascade frequency conversion of CO-laser radiation is demonstrated in a single sample of a nonlinear ZnGeP{sub 2} crystal. The crystal is pumped by a repetitively pulsed cryogenic lowpressure CO laser operating on {approx}150 vibration - rotational transitions in the wavelength range 5.0 - 7.5 {mu}m, which corresponds to the frequency range of a half octave. In the first conversion cascade, generation of second harmonic and sum frequencies of various pairs of CO-laser radiation give {approx}350 emission lines in the wavelength range 2.5 - 3.7 {mu}m. In the second cascade, by mixing the radiation converted in the first cascade with the residual radiation of the CO laser we have obtained {approx}90 lines in the range 4.3 - 5.0 {mu}m and more than 80 lines in the range 7.5 - 8.3 {mu}m. Thus, using a single sample of the nonlinear ZnGeP{sub 2} crystal pumped by the radiation of a single CO laser we have produced a source of broadband (more than one and a half octaves) laser radiation, simultaneously operating at {approx}670 lines in the wavelength range 2.5 - 8.3 {mu}m. (lasers)

Andreev, Yu M; Ionin, Andrei A; Kinyaevsky, I O; Klimachev, Yu M; Kozlov, A Yu; Kotkov, A A; Lanskii, G V; Shaiduko, A V

2013-02-28T23:59:59.000Z

222

Anatomy of the AGN in NGC 5548: I. A global model for the broadband spectral energy distribution  

E-Print Network (OSTI)

An extensive multi-satellite campaign on NGC 5548 has revealed this archetypal Seyfert-1 galaxy to be in an exceptional state of persistent heavy absorption. Our observations taken in 2013-2014 with XMM-Newton, Swift, NuSTAR, INTEGRAL, Chandra, HST and two ground-based observatories have together enabled us to establish that this unexpected phenomenon is caused by an outflowing stream of weakly ionised gas (called the obscurer), extending from the vicinity of the accretion disk to the broad-line region. In this work we present the details of our campaign and the data obtained by all the observatories. We determine the spectral energy distribution of NGC 5548 from near-infrared to hard X-rays by establishing the contribution of various emission and absorption processes taking place along our line of sight towards the central engine. We thus uncover the intrinsic emission and produce a broadband continuum model for both obscured (average summer 2013 data) and unobscured ($<$ 2011) epochs of NGC 5548. Our res...

Mehdipour, M; Kriss, G A; Cappi, M; Petrucci, P -O; Steenbrugge, K C; Arav, N; Behar, E; Bianchi, S; Boissay, R; Branduardi-Raymont, G; Costantini, E; Ebrero, J; Di Gesu, L; Harrison, F A; Kaspi, S; De Marco, B; Matt, G; Paltani, S; Peterson, B M; Ponti, G; Nuez, F Pozo; De Rosa, A; Ursini, F; de Vries, C P; Walton, D J; Whewell, M

2015-01-01T23:59:59.000Z

223

Broadband spectroscopy of the eclipsing high mass X-ray binary 4U 1700-37 with Suzaku  

E-Print Network (OSTI)

We present the results obtained from broadband spectroscopy of the high mass X-ray binary 4U 1700-37 using data from a Suzaku observation in 2006 September 13-14 covering 0.29-0.72 orbital phase range. The light curves showed significant and rapid variation in source flux during entire observation. We did not find any signature of pulsations in the light curves. However, a quasi-periodic oscillation at ~20 mHz was detected in the power density spectrum of the source. The 1-70 keV spectrum was fitted with various continuum models. However, we found that the partially absorbed high energy cutoff power-law and Negative and Positive power-law with Exponential cutoff (NPEX) models described the source spectrum well. Iron emission lines at 6.4 keV and 7.1 keV were detected in the source spectrum. An absorption like feature at ~39 keV was detected in the residuals while fitting the data with NPEX model. Considering the feature as cyclotron absorption line, the surface magnetic field of the neutron star was estimated...

Jaisawal, Gaurava K

2015-01-01T23:59:59.000Z

224

BROADBAND ESO/VISIR-SPITZER INFRARED SPECTROSCOPY OF THE OBSCURED SUPERGIANT X-RAY BINARY IGR J16318-4848  

SciTech Connect

A new class of X-ray binaries has recently been discovered by the high-energy observatory INTEGRAL. It is composed of intrinsically obscured supergiant high-mass X-ray binaries, unveiled by means of multi-wavelength X-ray, optical, near- and mid-infrared observations, in particular, photometric and spectroscopic observations using ESO facilities. However, the fundamental questions about these intriguing sources, namely, their formation, evolution, and the nature of their environment, are still unsolved. Among them, IGR J16318-4848, a compact object orbiting around a supergiant B[e] star, seems to be one of the most extraordinary celestial sources of our Galaxy. We present here new ESO/Very Large Telescope (VLT) VISIR mid-infrared (MIR) spectroscopic observations of this source. First, line diagnostics allow us to confirm the presence of absorbing material (dust and cold gas) enshrouding the whole binary system, and to characterize the nature of this material. Second, by fitting broadband near- to mid-infrared spectral energy distribution, including ESO NTT/SofI, VLT/VISIR, and Spitzer data, with a phenomenological model for sgB[e] stars, we show that the star is surrounded by an irradiated rim heated to a temperature of {approx}3800-5500 K, along with a viscous disk component at an inner temperature of {approx}750 K. VISIR data allow us to exclude the spherical geometry for the dust component. This detailed study will allow us in the future to get better constraints on the formation and evolution of such rare and short-living high-mass X-ray binary systems in our Galaxy.

Chaty, S.; Rahoui, F., E-mail: sylvain.chaty@cea.fr, E-mail: frahoui@cfa.harvard.edu [AIM (UMR-E 9005 CEA/DSM-CNRS-Universite Paris Diderot) Irfu/Service d'Astrophysique, Centre de Saclay, FR-91191 Gif-sur-Yvette Cedex (France)

2012-06-01T23:59:59.000Z

225

MAPPING THE SPATIAL DISTRIBUTION OF DUST EXTINCTION IN NGC 959 USING BROADBAND VISIBLE AND MID-INFRARED FILTERS  

SciTech Connect

We present a method to estimate and map the two-dimensional distribution of dust extinction in the late-type spiral galaxy NGC 959 from the theoretical and observed flux ratio of optical V and mid-IR (MIR) 3.6 {mu}m images. Our method is applicable to both young and old stellar populations for a range of metallicities, and is not restricted to lines of sight toward star-formation (SF) regions. We explore this method using a pixel-based analysis on images of NGC 959 obtained in the V band at the Vatican Advanced Technology Telescope and at 3.6 {mu}m (L band) with Spitzer/Infrared Array Camera. We present the original and extinction corrected Galaxy Evolution Explorer (GALEX) far-UV (FUV) and near-UV (NUV) images, as well as optical UBVR images of NGC 959. While the dust lanes are not clearly evident at GALEX resolution, our dust map clearly traces the dust that can be seen silhouetted against the galaxy's disk in the high-resolution Hubble Space Telescope (HST) images of NGC 959. The advantages of our method are (1) it only depends on two relatively common broadband images in the optical V band and in the MIR at 3.6 {mu}m (but adding a near-UV band improves its fidelity); and (2) it is able to map the two-dimensional spatial distribution of dust within a galaxy. This powerful tool could be used to measure the detailed distribution of dust extinction within higher redshift galaxies to be observed with, e.g., the Hubble Space Telescope (HST)/WFC3 (optical near-IR) and James Webb Space Telescope (mid-IR), and to distinguish properties of dust within galaxy bulges, spiral arms, and inter-arm regions.

Tamura, K.; Jansen, R. A.; Windhorst, R. A. [Department of Physics, Arizona State University, Tempe, AZ 85287-1504 (United States)], E-mail: ktamura@asu.edu, E-mail: rolf.jansen@asu.edu, E-mail: rogier.windhorst@asu.edu

2009-12-15T23:59:59.000Z

226

Broadband modelling of short gamma-ray bursts with energy injection from magnetar spin-down and its implications for radio detectability  

E-Print Network (OSTI)

The magnetar model has been proposed to explain the apparent energy injection in the X-ray light curves of short gamma-ray bursts (SGRBs), but its implications across the full broadband spectrum are not well explored. We investigate the broadband modelling of four SGRBs with evidence for energy injection in their X-ray light curves, applying a physically motivated model in which a newly-formed magnetar injects energy into a forward shock as it loses angular momentum along open field lines. By performing an order of magnitude search for the underlying physical parameters in the blast wave, we constrain the characteristic break frequencies of the synchrotron spectrum against their manifestations in the available multi-wavelength observations for each burst. The application of the magnetar energy injection profile restricts the succesful matches to a limited family of models that are self-consistent within the magnetic dipole spin-down framework. Because of this, we are able to produce synthetic light curves tha...

Gompertz, B P; O'Brien, P T; Wynn, G A; Wiersema, K

2014-01-01T23:59:59.000Z

227

The effect of broad-band Alfven-cyclotron waves spectra on the preferential heating and differential acceleration of He{sup ++} ions in the solar wind  

SciTech Connect

In anticipation of results from inner heliospheric missions such as the Solar Orbiter and the Solar Probe we present the results from 1.5D hybrid simulations to study the role of magnetic fluctuations for the heating and differential acceleration of He{sup ++} ions in the solar wind. We consider the effects of nonlinear Alfven-cyclotron waves at different frequency regimes. Monochromatic nonlinear Alfven-alpha-cyclotron waves are known to preferentially heat and accelerate He{sup ++} ions in collisionless low beta plasma. In this study we demonstrate that these effects are preserved when higherfrequency monochromatic and broad-band spectra of Alfven-proton-cyclotron waves are considered. Comparison between several nonlinear monochromatic waves shows that the ion temperatures, anisotropies and relative drift are quantitatively affected by the shift in frequency. Including a broad-band wave-spectrum results in a significant reduction of both the parallel and the perpendicular temperature components for the He{sup ++} ions, whereas the proton heating is barely influenced, with the parallel proton temperature only slightly enhanced. The differential streaming is strongly affected by the available wave power in the resonant daughter ion-acoustic waves. Therefore for the same initial wave energy, the relative drift is significantly reduced in the case of initial wave-spectra in comparison to the simulations with monochromatic waves.

Maneva, Y. G. [Department of Physics, Catholic University of America, Washington DC, 20064 (United States) and Heliophysics Science Devision, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Ofman, L. [Department of Physics, Catholic University of America, Washington, DC 20064 (United States) and Heliophysics Science Devision, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Vinas, A. F. [Heliophysics Science Devision, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2013-06-13T23:59:59.000Z

228

Implementing the National Broadband  

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

SPACE DATA CORPORATION SPACE DATA CORPORATION Space Data is the leader in high altitude balloon borne communications platforms where between 65-100,000 feet we have flown over 20,000 commercial SkySite® flights totaling over 250,000 flight hours as well as supply the military with our StarFighter® platform which extends 2 way radio communications from under 10 miles to over 400 miles. We were founded in 1999 and to develop our technology we decided that the ReFlex paging protocol was appropriate and that FCC licensed spectrum was available. Hence we participated in FCC Auctions 40, 41 and 50 and through secondary market transactions accumulated almost 2 of the 3 MHz allocated to Narrowband PCS (NPCS) in the 901/930/940 MHz bands. Through the auctions and continued subsequent transactions we have been able to

229

Implementing the National Broadband  

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

GREAT RIVER ENERGY GREAT RIVER ENERGY I. Introduction a. Identification/description of our company Great River Energy (GRE) is a not-for-profit generation and transmission cooperative which provides wholesale electricity to more than 1.7 million people through 28 member distribution cooperatives in Minnesota and Wisconsin. Great River Energy is the second largest utility in the state, based on generating capacity, and the sixth largest generation and transmission (G&T) cooperative in the United States. Great River Energy's member cooperatives range from those in the outer-ring suburbs of the Twin Cities to the Arrowhead region of Minnesota to the farmland of southwestern Minnesota. Great River Energy's largest

230

Implementing the National Broadband  

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

TACOMA PUBLIC UTILITIES TACOMA PUBLIC UTILITIES 3628 S. 35 TH ST. TACOMA WASHINGTON 98419 I. Introduction a. Identification/description of your company. Tacoma Public Utilities (TPU) is owned by the City of Tacoma. TPU management reports to a separate Public Utility Board that is accountable to the Tacoma City Council. The Utility comprises three main operating divisions: Water, Power and Rail. b. Overview of communications networks i. Tacoma Public Utilities (TPU), operates several Private radio networks. Tacoma Power (TPWR), uses an extensive private Microwave system, a private wide-area VHF land mobile radio system at all Hydro facilities with VHF paging, and a private trunked-900 MHz voice radio system. Tacoma Rail operates a wide-area VHF radio system on licensed Rail frequencies. Tacoma

231

Implementing the National Broadband  

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

Consumer and the Consumer and the Smart Grid: Data Access, Third Party Use and Privacy NBP RFI: Data Access, Third Party Use and Privacy COMMENTS OF BALTIMORE GAS & ELECTRIC COMPANY I. Introduction BGE is the nation's oldest and most experienced utility company. It has met the energy needs of Central Maryland for nearly 200 years. Today, it serves more than 1.2 million business and residential electric customers and approximately 650,000 gas customers in an economically diverse, 2,300-square-mile area encompassing Baltimore City and all or part of ten central Maryland counties. BGE already has many systems that it considers to be "smart." For example:

232

Implementing the National Broadband  

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

CROW WING POWER CROW WING POWER I. Introduction a. Identification/description of our company Crow Wing Power is a not-for-profit electric distribution cooperative which provides retail electricity to over 41,500 consumers in central Minnesota. Crow Wing Power owns and operates approximately 2,500 miles of overhead distribution lines and 2,700 miles of underground distribution lines. Our service territory cover approximately 4000 sq. miles and consists of flat farm fields in the south and to the north there are rolling hills, many lakes and heavy tree cover. Our main power supplier is Great River Energy. We also buy power from Basin Electric. b. Overview of communications networks 1. User of Great River Energy 700 MHz system. 2. Fiber 3. VHF Land Mobile Radios

233

Implementing the National Broadband  

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

EAST CENTRAL ENERGY-MINNESOTA EAST CENTRAL ENERGY-MINNESOTA I. Introduction a. Identification/description of your company. East Central Energy is a non-profit electric cooperative serving 57,000 customers and is located in east central Minnesota and northwestern Wisconsin. The cooperative serves an area of approximately 4,300 square miles. The geography varies from flat to large rolling hills with many lakes and wooded areas. For the most part the area is relatively sparsely populated. The average consumer density is about 7 consumers per mile. All power purchases are from our cooperative power supplier Great River Energy (GRE). II. Executive Summary Because of the lack of ubiquitous coverage by major carriers or operating telephone companies, East Central Energy has contracted with our G&T, Great River Energy

234

Implementing the National Broadband  

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

THE LOWER COLORADO RIVER AUTHORITY (LCRA) THE LOWER COLORADO RIVER AUTHORITY (LCRA) I. Introduction a. Identification/description of your company. LCRA is a conservation and reclamation district created by the Texas Legislature in 1934. It has no taxing authority and operates solely on utility revenues and fees generated from supplying energy, water and community services. LCRA supplies low-cost electricity for Central Texas, manages water supplies and floods in the lower Colorado River basin, develops water and wastewater utilities, provides public parks, and supports community and economic development in 58 Texas counties. LCRA is not an electric distribution utility but it sells wholesale electricity to more than 40 retail utilities, including cities and electric cooperatives

235

Implementing the National Broadband  

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

STEELE-WASECA COOPERATIVE ELECTRIC STEELE-WASECA COOPERATIVE ELECTRIC I. Introduction a. Identification/description of your company. Steele-Waseca Cooperative Electric is a distribution cooperative that mainly serves the rural area of the three counties of Rice, Steele, and Waseca in southwestern Minnesota. Some of Steele-Waseca Cooperative Electric's service territory also exists in the surrounding counties of Blue Earth, Dodge, Faribault, Freeborn and Le Sueur. With headquarters in Owatonna, MN, Steele-Waseca Cooperative Electric serves 9,583 members. The majority of the members served are in rural, agricultural areas though there are residential areas in Steele-Waseca Cooperative Electric territory in the bedroom communities of Medford and Lonsdale. Industrial and commercial

236

Implementing the National Broadband  

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

AVISTA CORPORATION AVISTA CORPORATION I. Introduction Founded in 1889, Avista engages in energy production, transmission and distribution, as well as other energy-related activities. An investor-owned utility (New York Stock Exchange ticker symbol: AVA) with annual revenues of more than $1.5 billion, Avista provides electric service to 356,000 customers and natural gas to 316,000 customers in a service territory of more than 30,000 square miles. We serve those customers with a mix of hydro, natural gas, coal, biomass, wind and other generation delivered over 2,600 miles of transmission line, 17,800 miles of distribution lines and 7,600 miles of natural gas distribution mains. Avista is headquartered in Spokane, Washington, and our nearly 1,600 employees work in

237

Implementing the National Broadband  

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

DAKOTA ELECTRIC ASSOCIATION DAKOTA ELECTRIC ASSOCIATION I. Introduction a. Identification/description of our company Dakota Electric Association (DEA) is an Incorporated Cooperative Association which distributes electricity to more than 100,000 members in Dakota County and surrounding areas. DEA is the second largest electric cooperative in the state of Minnesota, and is a member cooperative of Great River Energy (GRE). II. Executive Summary DEA has deployed a fully integrated IP network to 26 substation sites. An IP based network transports data information for Supervisory Control and Data Acquisition (SCADA) and Load Management systems. A private Wide Area Network (WAN) was implemented by DEA in 2001 due to lack of comprehensive coverage by major carriers. In addition to the WAN, DEA relies on commercial services to communicate with load

238

Implementing the National Broadband  

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

MEEKER COOPERATIVE LIGHT AND POWER-MINNESOTA MEEKER COOPERATIVE LIGHT AND POWER-MINNESOTA I. Introduction a. Identification/description of your company. Meeker Cooperative Light and Power (MCLP) is a non-profit electric cooperative serving 9120 consumers and is located in central Minnesota. The cooperative serves an area of approximately 1410 square miles. The geography varies from flat to moderate rolling hills with many lakes and wooded areas. For the most part the area is relatively sparsely populated. The average consumer density is less than five consumers per mile. All power purchases are from our cooperative power suppliers of Basin Electric Power COOP and Great River Energy (GRE). Overview of communications networks 1. 220 MHz radio point to point 2. 900 MHz MAS radio

239

Bulletin of the Seismological Society of America, Vol. 95, No. 3, pp. 12021208, June 2005, doi: 10.1785/0120040098 Broadband Seismic Noise Analysis of the Himalayan Nepal Tibet  

E-Print Network (OSTI)

, doi: 10.1785/0120040098 Broadband Seismic Noise Analysis of the Himalayan Nepal Tibet Seismic at sites to stabilize after deployment noise as part of the Himalayan Nepal Tibet Seismic Experiment (HIMNT seismometer deployed in Nepal and Tibet and then compared them with the high-noise model and low-noise Model

Sheehan, Anne F.

240

Raciometry W. J:. Shaw and C. D. Whiteman Pacific Northwest Laboratory(a)  

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

W. J:. Shaw and C. D. Whiteman W. J:. Shaw and C. D. Whiteman Pacific Northwest Laboratory(a) Richland, WA 99352 Field measurements to evaluate the parameterizations used in this model were carried out in May 1992 under clear skies using short- and long-wave radiometers mounted on a computer-driven platform. The platform repeatedly stepped through 360 degrees of azimuth and 20 degrees of elevation about the horizontal over a 24-h period. Radiosondes were released to account for the dependence of downwelling long-wave radiance on atmospheric water vapor. These observations compare satisfactorily with model integrations. Using the parameterized radiances and Gaussian tipping in one dimension, we have shown tnat the balloon-borne radiometer platform will work satisfactorily if oscillations about level are on the order of a degree or

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

INTEGRAL discovery of unusually long broad-band X-ray activity from the Supergiant Fast X-ray Transient IGR J18483-0311  

E-Print Network (OSTI)

We report on a broad-band X-ray study (0.5-250 keV) of the Supergiant Fast X-ray Transient IGR J18483-0311 using archival INTEGRAL data and a new targeted XMM-Newton observation. Our INTEGRAL investigation discovered for the first time an unusually long X-ray activity (3-60 keV) which continuously lasted for at least 11 days, i.e. a significant fraction (about 60%) of the entire orbital period, and spanned orbital phases corresponding to both periastron and apastron passages. This prolongated X-ray activity is at odds with the much shorter durations marking outbursts from classical SFXTs especially above 20 keV, as such it represents a departure from their nominal behavior and it adds a further extreme characteristic to the already extreme SFXT IGR J18483-0311. Our IBIS/ISGRI high energy investigation (100-250 keV) of archival outbursts activity from the source showed that the recently reported hint of a possible hard X-ray tail is not real and it is likely due to noisy background. The new XMM-Newton targeted...

Sguera, V; Bird, A J; Bazzano, A

2015-01-01T23:59:59.000Z

242

ARM - Instrument - spn  

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

govInstrumentsspn govInstrumentsspn Documentation SPN : Instrument Mentor Monthly Summary (IMMS) reports SPN : Data Quality Assessment (DQA) reports 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 Instrument : Sunshine Pyranometer (SPN) Instrument Categories Radiometric The Sunshine Pyranometer (SPN) measures total and diffuse short wave solar irradiance with an array of seven thermopile detectors arranged beneath a permanent shading pattern. The instrument is able to measure both total and diffuse irradiance with no moving parts. Primary Measurements The following measurements are those considered scientifically relevant. Shortwave broadband diffuse downwelling irradiance Shortwave broadband total downwelling irradiance

243

PowerPoint Presentation  

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

STM BBHRP STM BBHRP NASA Langley Research Center / Atmospheric Sciences ARM March 10-14, 2008 Improvements in Broadband Shortwave and Longwave Fluxes over ARM Domains M.M. Khaiyer, D.R.Doelling, M.L. Nordeen, R. Palikonda, Y. Yi Science Systems and Applications, Inc. P. Minnis National Aeronautics and Space Administration Langley Research Center Climate Science Branch ARM STM BBHRP NASA Langley Research Center / Atmospheric Sciences ARM March 10-14, 2008 Introduction * NASA Langley Cloud Group provides broadband (BB) shortwave (SW) and longwave (LW) fluxes derived from GOES narrowband (NB) radiances (Available from May 1998 to August 2005) * Narrow-to-broadband (NB-BB) conversion technique based on regressing coincident co-located 1° averaged CERES BB and GOES NB fluxes.

244

Broadband Confocal and Multiphoton Microscope  

E-Print Network (OSTI)

biology, neurosciences, medical research. Today, it is a major challenge to penetrate deeper into samples with pulsed infrared lasers. Thanks to reduced absorption and scattering of the excitation light, two, Medical Faculty, University Heidelberg, Germany Top right: plathyneris spec. Courtesy of Dr. Leonid Nezlin

Adams, Mark

245

Broadband Ground-Plane Cloak  

Science Journals Connector (OSTI)

...automated design process. The ground-plane...Maxwell's equations implies that...number of simulations of the metamaterial...cloak-design process and makes...Jacobian matrix {lambda...Jacobian matrix). In our...retrieval process, modified...numerical simulation. A regression...a single Matlab program...Adobe Acrobat PDF format...

R. Liu; C. Ji; J. J. Mock; J. Y. Chin; T. J. Cui; D. R. Smith

2009-01-16T23:59:59.000Z

246

A Highly Linear Broadband LNA  

E-Print Network (OSTI)

results including PVT variation and the Monte Carlo simulation are presented. We obtained -10dB S11, 9.77dB S21, and 4.63dB Noise Figure with IIP3 of 19.18dBm for the designed LNA....

Park, Joung Won

2010-10-12T23:59:59.000Z

247

CISCO MULTISERVICE BROADBAND CABLE GUIDE  

E-Print Network (OSTI)

..............................................................................................................2-19 Optica

Westall, James M.

248

Broadband Seismic Station Installation Guidelines  

Science Journals Connector (OSTI)

...serviced, the top of the foam box is cut on a bevel...convection of air through the foam insulating box, and it...not apply stress to the cable and thus induce noise...seismometer with a 4 inch thick foam box will result in a thermal...dissipation, it can be heavily insulated without an excessive rise...

Robert A. Uhrhammer; William Karavas; Barbara Romanowicz

249

ARM - Measurement - Shortwave broadband radiance  

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

0.4 and 4 mu, emitted by a radiator in a given direction, expressed in units of energy per unit time per unit solid angle. Categories Radiometric Instruments The above...

250

Microsoft PowerPoint - SurfSpecAlb_cnl4.ppt  

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

28 March 2007 28 March 2007 Process for Estimating Broadband and Spectral Albedo 'Diffuse' Albedo - refers to albedo when direct/total SW < 15% * broadband and spectral albedo for a given day are nearly constant, and nearly equal to the albedo of clear sky conditions for a period shortly before and following solar noon. 'Direct' Albedo Slope and Offset - refers to albedo when direct/total SW >= 15% * broadband and spectral broadband albedo are relatively linear with respect to the cosine solar zenith angle. Albedo Estimation * Albedos characterized as either 'diffuse' or 'direct' based on whether the ratio of best estimate direct to best estimate total downwelling irradiance is above or below 15% * Missing albedos estimated using either the albedo noon value for 'diffuse'

251

sheaffer-99.PDF  

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

Diurnal Variations of Outgoing Longwave Diurnal Variations of Outgoing Longwave Radiation Over the Tropical Oceans J. D. Sheaffer and W. M. Gray Department of Atmospheric Science Colorado State University Fort Collins, Colorado Introduction Several current problems in atmospheric radiation over the tropical oceans may have at least partial solutions as effects of diurnal variations of outgoing longwave radiation (OLR). At issue are explanations for the following: a) excessively large amplitudes (in relation to theory) of the diurnal thermal tides over the tropical oceans (Braswell and Lindzen 1998); b) reported observations of excessively large direct atmospheric absorption of incident broadband solar radiation, which conflict with prior work and concurrent, collocated narrowband measurements centered in the visible spectrum

252

Request for Information (RFI) from the Department of Energy for Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy  

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

NBP RFI: Data Access NBP RFI: Data Access Honeywell Responses To Request for Information (RFI) from the Department of Energy on Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy 1. Who owns energy consumption data? The utility needs access to "raw" billing data, i.e., meter readings that take place every time the price changes and allow the utility to calculate the consumption during a particular time period and rate the consumption according to the price in effect during that period. Based on the FIPP principle of data minimization, it is expected that these meter readings would occur just a few times per day (e.g., every time a new price period begins

253

570 BIOCHIMICA ET BIOPHYSICA ACTA A LONG-WAVE ABSORBING FORM OF CHLOROPHYLL a RESPONSIBLE  

E-Print Network (OSTI)

Chlorella cells are ruptured at pH 4.6 by sonication in air, its absorption spectrum can be best explained Chlorella cells at 77 °K, may be due to increased fluorescence efficiency of Chl a 693 at low temperature to perform light reactions I and II. In the present work, we ruptured Chlorella cells by sonication

Govindjee

254

Under consideration for publication in J. Fluid Mech. 1 Long-wave Dynamics of an Inextensible  

E-Print Network (OSTI)

, is essential to a wide range of cellular functions partly because the membrane regulates the transport of par 2013) electric fields. Negative membrane tension and the ion currents in the diffuse layers near by the ion currents near the membrane (Lacoste et al. 2007, 2009; Ziebert et al. 2010; Ziebert & Lacoste 2010

Young, Yuan N.

255

On the Contribution of Longwave Radiation to Global Climate Model Biases in Arctic Lower Tropospheric Stability  

Science Journals Connector (OSTI)

Previous research has found that global climate models (GCMs) usually simulate greater lower tropospheric stabilities compared to reanalysis data. To understand the origins of this bias, the authors examine hindcast simulations initialized with ...

Neil P. Barton; Stephen A. Klein; James S. Boyle

2014-10-01T23:59:59.000Z

256

Shortwave and longwave radiative contributions to global warming under increasing CO2  

Science Journals Connector (OSTI)

...Atmospheric and Planetary Sciences, Massachusetts Institute of Technology...Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge...enhancement of net absorbed solar radiation (ASR). A simple...balances the net absorbed solar radiation (ASR). In this...

Aaron Donohoe; Kyle C. Armour; Angeline G. Pendergrass; David S. Battisti

2014-01-01T23:59:59.000Z

257

Longwave plasmonics on doped silicon and Richard Soref, Robert E. Peale, and Walter Buchwald  

E-Print Network (OSTI)

and silicided guides, the SPP mode field extends much more into the air above the stripe than it does plasmon oscillations and their applications," in Physics of Thin Films, G. Hass, M. Francombe, and R. W. Hoffman, eds., (Academic Press, NY, 1977). 9. E. D. Palik, ed., Handbook of Optical Constants of Solids

Peale, Robert E.

258

Shortwave and longwave radiative contributions to global warming under increasing CO2  

E-Print Network (OSTI)

global warm- ing, with the world ocean as the primary reservoir for energy accumulation (1). In turn posi- tive, OLR recovers within merely several decades, and any subse- quent global energy accumulation warming is likely caused by enhanced ASR. global warming | climate feedbacks | energy accumulation Global

Battisti, David

259

Variability in Long-Wave Runup as a Function of Nearshore Bathymetric Features  

E-Print Network (OSTI)

and can be highly variable. The dynamic environment along the coast requires the thorough analysis of offshore features (Plant and Holman, 1997; Wang and Davis, 1998) which can be obtained through Light Detection and Ranging (lidar) (Brock et al., 2002... the movement of the sandbar to growth ratio. The results show that the sandbars moved onshore when the significant wave height was less than 1 m and offshore for wave heights greater than 1 m (Plant and Holman, 1997). The magnitude of the sandbar response...

Dunkin, Lauren M.

2011-08-08T23:59:59.000Z

260

Can desert dust explain the outgoing longwave radiation anomaly over the Sahara during July 2003?  

E-Print Network (OSTI)

of the Met Office Unified Model. A significant difference is found over desert regions of northern Africa:10.1029/2004JD005232. 1. Introduction [2] The top of the atmosphere radiative energy balance between net incoming solar radiation and outgoing long- wave radiation (OLR) is crucial in determining

Allan, Richard P.

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

hagan-98.pdf  

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

Aerobot-based Measurements of the Profile of Aerobot-based Measurements of the Profile of Downwelling Shortwave Irradiance D. Hagan, J.-F. Blavier, and D. Crisp Jet Propulsion Laboratory California Institute of Technology Pasadena, California L. Di Girolamo University of Chicago Chicago, Illinois T. P. Ackerman The Pennsylvania State University College Park, Pennsylvania Summary Using a helium plus reversible fluid balloon system as the observing platform, multiple profiles of shortwave irradi- ance between 4 km and 10 km were recently obtained over the Los Angeles basin. Measurements of downwelling hemispheric broadband irradiance were made over a period of 6 hours in conditions that could be characterized by a mid-latitude, summer model atmosphere. These data are described and compared to model computations using a

262

Section 42  

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

A Rotating Shadow Arm for Broadband Hemispheric A Rotating Shadow Arm for Broadband Hemispheric Radiometers: Instrument Design and Concept Verification Using Atmospheric Radiation Measurement Southern Great Plains Radiometer Measurements C.N. Long, C.F. Pavloski, and T.P. Ackerman Department of Meteorology Pennsylvania State University University Park, Pennsylvania Measurement of the components of downwelling broadband The total and diffuse irradiance measurements are output shortwave (SW) irradiance at the surface can be difficult to every minute. These values include 30 seconds of measure- accomplish. Because the diffuse irradiance under clear (i.e., ments for the total irradiance average and 17 seconds for the cloudless) skies is typically only about 10% of the magnitude diffuse. Information on whether the shading arm was

263

ARM - Datastreams - prpfrsr  

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

Datastreamsprpfrsr Datastreamsprpfrsr Documentation Data Quality Plots 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 Datastream : PRPFRSR Portable Radiation Package: Fast Rotating Shadowband Radiometer Active Dates 2012.11.02 - 2013.09.26 Measurement Categories Radiometric Originating Instrument Portable Radiation Package (PRP) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Bin numbers for sweep measurements unitless bin ( bin ) Shortwave broadband total downwelling irradiance Shadow record, mean hemispheric irradiance at end of sweep, broadband channel mV end_sweep_hemisp_broadband ( time )

264

Section 11  

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

Implications for Atmospheric State Specification from the Implications for Atmospheric State Specification from the AERI/LBLRTM Quality Measurement Experiment and the MWR/LBLRTM Quality Measurement Experiment S.A. Clough and P.D. Brown Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts J.C. Liljegren, T.R. Shippert, and D.D. Turner Pacific Northwest National Laboratory Richland, Washington R.O. Knuteson, H.E. Revercomb, and W.L. Smith University of Wisconsin Madison, Wisconsin Introduction The ongoing Atmospheric Emitted Radiance Interferometer (AERI)/Line By Line Radiative Transfer Model (LBLRTM) Quality Measurement Experiment (QME), in which the spectral residuals between the downwelling longwave radiance measured by the University of Wisconsin AERI at the Central Facility of the Southern Great Plains (SGP) site and

265

ARM - Publications: Science Team Meeting Documents  

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

3 Science Team Meeting 3 Science Team Meeting 2003 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-2003, April 2003 Broomsfield, Colorado For proper viewing, extended abstracts should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A 20-year Data Set of Downwelling Longwave Flux at the Arctic Surface from TOVS Satellite Data Francis, J.A., Schweiger, A., and Key, J. A Comparison of Aerosol Scattering Parameters Obtained by Ground-Based Remote Sensing and In-situ Profile Flights*

266

1  

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

Analysis of the AERI/LBLRTM QME Analysis of the AERI/LBLRTM QME D. C. Tobin, D. D. Turner, H. E. Revercomb, and R. O. Knuteson University of Wisconsin-Madison Madison Wisconsin S. A. Clough, and K. Cady-Pereira Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts Introduction A Quality Measurement Experiment (QME) comparing clear-sky downwelling longwave radiance at the surface from observations and model calculations has been performed by the Atmospheric Radiation Measurement (ARM) Program for many years (e.g., Brown et al. 1995; Clough et al. 1996). This QME has been used to (1) validate and improve absorption models and spectral line parameters used within the Line-by-Line Radiative Transfer Model (LBLRTM), (2) assess the ability to define the atmospheric

267

nab-ARM_land2_v5.ppt  

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

corresponding result can be seen in the corresponding result can be seen in the top-of-atmosphere long-wave flux. Figure 3 shows the modelled OLR and that measured by the ARG product. The difference is postulated to be because the AMF ground measurements are not representative of the area within the ARG pixel. Figure 4 shows the SEVIRI 10.8μm-derived skin temperatures: over the region, the temperature variations can account for an upwelling flux variation of 70 Wm -2 . At the AMF, Niamey airport site itself, the November-averaged skin temperature is ~319K. Figure 2: 0.6μm SEVIRI radiances. Mean of all times during November 2006 without cloud-cover. The dark band is the Niger river. Figure 1: TOA SW fluxes via two products from satellite measurements: ARG and HR. Figure 5: Daily-averaged down-welling LW flux, from AMF

268

X:\ARM_19~1\PGS29-47.WPD  

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

cm cm 1 Session Papers 29 Initial Analyses of Surface Spectral Radiance Between Observations and Line-by-Line Calculations P. D. Brown and S. A. Clough N. E. Miller, T. R. Shippert, and D. D. Turner Atmospheric and Environmental Research, Inc. Pacific Northwest National Laboratory Cambridge, Massachusetts Richland, Washington R. O. Knuteson, H. E. Revercomb, and W. L. Smith University of Wisconsin Madison, Wisconsin Introduction The evaluation and improvement of radiative transfer cal- culations are essential to attain improved performance of general circulation models (GCMs) for climate change applications. A Quality Measurement Experiment (QME) is being conducted to analyze the spectral residuals between the downwelling longwave radiance measured by the University of Wisconsin Atmospheric Emitted

269

New Surface Meteorological Measurements at SGP,  

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

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

270

hagan-99.PDF  

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

Compact Spectral Radiometer for In Situ Solar Flux Compact Spectral Radiometer for In Situ Solar Flux Measurements D. E. Hagan, M. Foote, J.-F. Blavier, L. Wild, and E. Jones Jet Propulsion Laboratory California Institute of Technology Pasadena, California Introduction We describe here the breadboard version of a lightweight, compact radiometer, which uses microthermopile detectors for hemispheric measurements of broadband and spectral downwelling solar irradiance. The instrument has undergone initial operability tests, and some limited field characterization has been performed against an Eppley Precision Spectral Pyranometer (PSP). The radiometer has a unique combination of characteristics that allow it to provide scientific data not easily available with any other technique. These characteristics include:

271

An Analysis of the Broadband (22-3900 MHz) Radio Spectrum of HB3 (G132.7+1.3): The Detection of Thermal Radio Emission from an Evolved Supernova Remnant?  

E-Print Network (OSTI)

We present an analysis of the broadband radio spectrum (from 22 to 3900 MHz) of the Galactic supernova remnant (SNR) HB3 (G132.7+1.3). Published observations have revealed that a curvature is present in the radio spectrum of this SNR, indicating that a single synchrotron component appears is insufficient to adequately fit the spectrum. We present here a fit to this spectrum using a combination of a synchrotron component and a thermal bremsstrahlung component. We discuss properties of this latter component and estimate the ambient density implied by the presence of this component to be n \\~ 10 cm^-3. We have also analyzed extracted X-ray spectra from archived {\\it ASCA} GIS observations of different regions of HB3 to obtain independent estimates of the density of the surrounding interstellar medium (ISM). From this analysis, we have derived electron densities of 0.1-0.4 f^-1/2 cm^-3 for the ISM for the three different regions of the SNR, where f is the volume filling factor. By comparing these density estimates with the estimate derived from the thermal bremsstrahlung component, we argue that the radio thermal bremsstrahlung emission is emitted from a thin shell enclosing HB3. The presence of this thermal bremsstrahlung component in the radio spectrum of HB3 suggests that this SNR is in fact interacting with an adjacent molecular cloud associated with the HII region W3. By extension, we argue that the presence of thermal emission at radio wavelengths may be a useful tool for identifying interactions between SNRs and molecular clouds, and for estimating the ambient density near SNRs using radio continuum data.

D. Urosevic; T. Pannuti; D. Leahy

2006-12-22T23:59:59.000Z

272

A Climatology of Surface Cloud Radiative Effects at the ARM Tropical Western Pacific Sites  

SciTech Connect

Cloud radiative effects on surface downwelling fluxes are investigated using long-term datasets from the three Atmospheric Radiation Measurement (ARM) sites in the Tropical Western Pacific (TWP) region. The Nauru and Darwin sites show significant variability in sky cover, downwelling radiative fluxes, and surface cloud radiative effect (CRE) due to El Nio and the Australian monsoon, respectively, while the Manus site shows little intra-seasonal or interannual variability. Cloud radar measurement of cloud base and top heights are used to define cloud types so that the effect of cloud type on the surface CRE can be examined. Clouds with low bases contribute 71-75% of the surface shortwave (SW) CRE and 66-74% of the surface longwave (LW) CRE at the three TWP sites, while clouds with mid-level bases contribute 8-9% of the SW CRE and 12-14% of the LW CRE, and clouds with high bases contribute 16-19% of the SW CRE and 15-21% of the LW CRE.

McFarlane, Sally A.; Long, Charles N.; Flaherty, Julia E.

2013-04-01T23:59:59.000Z

273

Graphene as Gain Medium for Broadband Lasers  

E-Print Network (OSTI)

In contrast to conventional structures, efficient non-radiative carrier recombination counteracts the appearance of optical gain in graphene. Based on a microscopic and fully quantum-mechanical study of the coupled carrier, phonon, and photon dynamics in graphene, we present a strategy to obtain a long-lived gain: Integrating graphene into a photonic crystal nanocavity and applying a high-dielectric substrate gives rise to pronounced coherent light emission suggesting the design of graphene-based laser devices covering a broad spectral range.

Jago, Roland; Knorr, Andreas; Malic, Ermin

2014-01-01T23:59:59.000Z

274

The Broadband Spectrum of Galaxy Clusters  

E-Print Network (OSTI)

We examine whether nonthermal protons energized during a cluster merger are simultaneously responsible for the Coma cluster's diffuse radio flux (via secondary decay) and the departure of its intra-cluster medium (ICM) from a thermal profile via Coulomb collisions between the quasithermal electrons and the hadrons. Rather than approximating the influence of nonthermal proton/thermal electron collisions as extremely rare events which cause an injection of nonthermal, power-law electrons (the `knock-on' approximation), we self-consistently solve (to our knowledge, for the first time) the covariant kinetic equations for the two populations. The electron population resulting from these collisions is out of equilibrium, yet not a power law, and importantly displays a higher bremsstrahlung radiative efficiency than a pure power law. Observations with GLAST will test this model directly.

Brandon Wolfe; Fulvio Melia

2007-12-02T23:59:59.000Z

275

Optical Broadband Angular Selectivity Yichen Shen,1  

E-Print Network (OSTI)

,2 John D Joannopoulos,1 and Marin Soljaci´c1 1 Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 2 Department of Mathematics, Massachusetts Institute in many applications, such as high efficiency solar energy conversion (9,10), privacy protection (11

Soljaèiæ, Marin

276

The Broadband Heating Rate Profile (BBHRP) VAP  

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

brown-97.pdf Clothiaux, E. E., T. P. Ackerman, G. G. Mace, K. P. Moran, R. T. Marchand, M. Miller, and B. E. Martner, 2000: Objective determination of cloud heights and...

277

ARM - Measurement - Shortwave broadband total net irradiance  

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

Range Weather Forecasts Diagnostic Analyses ECMWF : European Centre for Medium Range Weather Forecasts Model Data Value-Added Products ARMBE : ARM Best Estimate Data Products...

278

Broadband microwave burst produced by electron beams  

E-Print Network (OSTI)

Theoretical and experimental study of fast electron beams attracts a lot of attention in the astrophysics and laboratory. In the case of solar flares the problem of reliable beam detection and diagnostics is of exceptional importance. This paper explores the fact that the electron beams moving oblique to the magnetic field or along the field with some angular scatter around the beam propagation direction can generate microwave continuum bursts via gyrosynchrotron mechanism. The characteristics of the microwave bursts produced by beams differ from those in case of isotropic or loss-cone distributions, which suggests a new tool for quantitative diagnostics of the beams in the solar corona. To demonstrate the potentiality of this tool, we analyze here a radio burst occurred during an impulsive flare 1B/M6.7 on 10 March 2001 (AR 9368, N27W42). Based on detailed analysis of the spectral, temporal, and spatial relationships, we obtained firm evidence that the microwave continuum burst is produced by electron beams. For the first time we developed and applied a new forward fitting algorithm based on exact gyrosynchrotron formulae and employing both the total power and polarization measurements to solve the inverse problem of the beam diagnostics. We found that the burst is generated by a oblique beam in a region of reasonably strong magnetic field ($\\sim 200-300$ G) and the burst is observed at a quasi-transverse viewing angle. We found that the life time of the emitting electrons in the radio source is relatively short, $\\tau_l \\approx 0.5$ s, consistent with a single reflection of the electrons from a magnetic mirror at the foot point with the stronger magnetic field. We discuss the implications of these findings for the electron acceleration in flares and for beam diagnostics.

A. T. Altyntsev; G. D. Fleishman; G. -L. Huang; V. F. Melnikov

2007-12-16T23:59:59.000Z

279

Nanogap Transducer for Broadband Gravitational Wave Detection  

E-Print Network (OSTI)

By changing from a resonant multimode paradigm to a free mass paradigm for transducers in resonant mass gravitational wave detection, an array of six spheres can achieve a sensitivity response curve competitive with interferometers, being as sensitive as GEO600 and TAMA300 in the 3 to 6 kHz band and more sensitive than LIGO for 50 percent of the 6 to 10 kHz band. We study how to assemble a klystron resonant cavity that has a 1 nm gap by understanding the stability of the forces applied at it (Casimir force, elastic force, weight). This approach has additional benefits. First, due to the relatively inexpensive nature of this technology (around US$ 1 million), it is accessible to a broader part of the world scientific community. Additionally, spherical resonant mass detectors have the ability to discern both the direction and polarization resolutions.

Guilherme L. Pimentel; Odylio D. Aguiar; Michael E. Tobar; Joaquim J. Barroso; Rubens de M. Marinho

2009-10-06T23:59:59.000Z

280

ARM - Measurement - Shortwave broadband total upwelling irradiance  

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

Flights) MFR : Multifilter Radiometer MFRIRT : Multifilter Radiometer and Infrared Thermometer RAD : Radiation Measurements at AMF SIRS : Solar and Infrared Radiation Station...

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Michalsky-JJ  

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

Accuracy of Broadband Shortwave Irradiance Accuracy of Broadband Shortwave Irradiance Measurements Using the Open Silicon Channel of the MFRSR J. J. Michalsky State University of New York Albany, New York Introduction The best routine Atmospheric Radiation Measurement (ARM) Program measurement of downwelling irradiance in the total shortwave band is a sum of diffuse horizontal irradiance and the direct normal irradiance component that is incident horizontally (diffuse horizontal). The latter is obtained by multiplying the direct normal irradiance by the cosine of the solar zenith angle. Ideally, these measurements are made with a near-zero-offset, shaded, thermopile pyranometer and a thermopile pyrheliometer, respectively. At each central and extended facility within the ARM Program, the shaded

282

CPU/GPU computing for long-wave radiation physics on large GPU clusters Fengshun Lu n  

E-Print Network (OSTI)

within the Tianhe-1A supercomputer. Experimental results demonstrate that the hybrid version can expensive that it is often performed with coarser grid resolutions and longer time steps in operational heavily on HPC platforms. Owing to the continuous evolution of the computational infrastructure

Bridges, Patrick

283

ARM - Datastreams - allruc20hybr  

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

hybr hybr Documentation XDC documentation Data Quality Plots 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 Datastream : ALLRUC20HYBR Rapid Update Cycle (RUC) model: hybrid analysis data, 20-km resolution Active Dates 2002.05.15 - 2002.10.16 Measurement Categories Atmospheric State, Cloud Properties, Radiometric, Surface Properties Originating Instrument Rapid Update Cycle Model Data (RUC) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Convection cape Convection cinhib Latent heat flux fluxlatentsrf Longwave broadband net irradiance fluxlwnetsrf Sensible heat flux fluxsensiblesrf Shortwave broadband total net irradiance

284

ARM - Datastreams - mfrirt25m  

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

Datastreamsmfrirt25m Datastreamsmfrirt25m Documentation Data Quality Plots 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 Datastream : MFRIRT25M Infrared Thermometer (MFRIRT): upwelling radiance, instantaneous 20-sec at 25-meter height Active Dates 2001.04.01 - 2001.09.26 Measurement Categories Radiometric, Surface Properties Originating Instrument Multifilter Radiometer and Infrared Thermometer (MFRIRT) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Surface skin temperature sfc_ir_temp Longwave broadband upwelling irradiance up_long_hemisp Shortwave broadband total upwelling irradiance up_short_hemisp Locations Southern Great Plains

285

ARM - Datastreams - allruc40hybr  

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

hybr hybr Documentation XDC documentation Data Quality Plots 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 Datastream : ALLRUC40HYBR Rapid Update Cycle (RUC) model: hybrid analyisis data, 40 km resolution Active Dates 1998.12.05 - 2002.04.16 Measurement Categories Atmospheric State, Cloud Properties, Radiometric, Surface Properties Originating Instrument Rapid Update Cycle Model Data (RUC) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Convection cape Convection cinhib Latent heat flux fluxlatentsrf Longwave broadband net irradiance fluxlwnetsrf Sensible heat flux fluxsensiblesrf Shortwave broadband total net irradiance

286

Reconciling Ground-Based and Space-Based Estimates of the Frequency of Occurrence and Radiative Effect of Clouds around Darwin, Australia  

SciTech Connect

The objective of this paper is to investigate whether estimates of the cloud frequency of occurrence and associated cloud radiative forcing as derived from ground-based and satellite active remote sensing and radiative transfer calculations can be reconciled over a well instrumented active remote sensing site located in Darwin, Australia, despite the very different viewing geometry and instrument characteristics. It is found that the ground-based radar-lidar combination at Darwin does not detect most of the cirrus clouds above 10 km (due to limited lidar detection capability and signal obscuration by low-level clouds) and that the CloudSat radar - Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) combination underreports the hydrometeor frequency of occurrence below 2 km height, due to instrument limitations at these heights. The radiative impact associated with these differences in cloud frequency of occurrence is large on the surface downwelling shortwave fluxes (ground and satellite) and the top-of atmosphere upwelling shortwave and longwave fluxes (ground). Good agreement is found for other radiative fluxes. Large differences in radiative heating rate as derived from ground and satellite radar-lidar instruments and RT calculations are also found above 10 km (up to 0.35 Kday-1 for the shortwave and 0.8 Kday-1 for the longwave). Given that the ground-based and satellite estimates of cloud frequency of occurrence and radiative impact cannot be fully reconciled over Darwin, caution should be exercised when evaluating the representation of clouds and cloud-radiation interactions in large-scale models and limitations of each set of instrumentation should be considered when interpreting model-observations differences.

Protat, Alain; Young, Stuart; McFarlane, Sally A.; L'Ecuyer, Tristan; Mace, Gerald G.; Comstock, Jennifer M.; Long, Charles N.; Berry, Elizabeth; Delanoe, Julien

2014-02-01T23:59:59.000Z

287

Microsoft Word - long-cn.doc  

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

Next Generation Flux Analysis: Adding Clear-Sky LW Next Generation Flux Analysis: Adding Clear-Sky LW and LW Cloud Effects, Cloud Optical Depths, and Improved Sky Cover Estimates C. N. Long Pacific Northwest National Laboratory Richland, Washington Introduction The original Shortwave Flux Analysis (SWFA), based on Long and Ackerman (2000) and Long et al. (1999), deals only with daylight shortwave (SW) data. The SWFA algorithm produces continuous estimates of clear-sky downwelling diffuse, direct, and total SW; estimated fractional sky cover; and identification of when the sky was cloudless. This algorithm package is being produced as an Atmospheric Radiation Measurement (ARM) value-added product (VAP), as described in Long and Gaustad (2001). Subsequent efforts for analysis of surface broadband radiation and meteorological measurements now

288

Microsoft Word - shi_y.doc  

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

Measurement Data Quality Assessment Measurement Data Quality Assessment at the Atmospheric Radiation Measurement Program Tropical Western Pacific and North Slope of Alaska Sites Y. Shi and C.N. Long Pacific Northwest National Laboratory Richland, Washington Introduction The QCRad VAP is being developed to assess the data quality for surface broadband radiation data collected at all Atmospheric Radiation Measurement (ARM) Program facilities, and provide continuity where possible for missing or "bad" shortwave (SW) irradiance from collocated instruments. In previous ARM Science Team Meetings we have presented analyses of data quality assessment for the Southern Gret Plains (SGP) Extended Facilities (Shi and Long 2003), and the techniques and methods used to derive the best estimate of total downwelling shortwave radiation (Shi and Long 2004). We

289

ARM - Campaign Instrument - pyran-delta-spn1  

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

delta-spn1 delta-spn1 Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : Delta-T Sunshine Pyranometer- SPN1 (PYRAN-DELTA-SPN1) Instrument Categories Radiometric Campaigns Diffuse Shortwave IOP [ Download Data ] Southern Great Plains, 2001.09.24 - 2001.10.22 Surface Observation in Support of in-situ Observations within the Arctic Boundary Layer [ Download Data ] North Slope Alaska, 2008.04.01 - 2008.05.31 Primary Measurements Taken The following measurements are those considered scientifically relevant. Refer to the datastream (netcdf) file headers for the list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Shortwave broadband total downwelling irradiance

290

1  

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

Evaluation of Cloud Cover, Cloud Effect, and Surface Evaluation of Cloud Cover, Cloud Effect, and Surface Radiation Budgets at the SGP and TWP ARM Sites K. L. Gaustad and C. N. Long Pacific Northwest National Laboratory Richland, Washington Introduction The U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program has established networks of broadband shortwave (SW) radiometers at each of its field research sites. The shortwave flux analysis value-added product (SWFuxAnal VAP) applies a clear-sky detection and fitting technique to data collected from these sensors to identify clear-sky conditions, produce a continuous estimate of clear-sky SW irradiance, and assess the effect of cloudiness on downwelling SW measurements. The clear-sky detection algorithm has been expanded to allow its use in not only

291

Thunderhead Radiation Measurements and Radiative Flux Analysis in Support of STORMVEX  

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

Thunderhead Radiation Thunderhead Radiation Measurements and Radiative Flux Analysis in Support of STORMVEX Chuck Long Jay Mace Intent * Provide downwelling broadband radiation measurements at Thunderhead * Physically small footprint portable system * Designed to provide inputs necessary for Radiative Flux Analysis Basic RFA System COPS Hornisgrinde Deployment 1200m elevation System Components * Eppley ventilated PSP * Eppley ventilated PIR * Delta-T SPN-1 * Vaisala HMP-50 T/RH probe * Campbell CR23X datalogger SPN-1 Radiometer * Uses 7 thermopile detectors and a patented shading pattern * Measures Total and Diffuse SW with no moving parts * Includes internal heaters Relative accuracy StDev = 13.6 Winter Mountain Deployment Frost/Snow Mitigation * NSA Heated Ventilator Evaluation IOP - Testing various configurations and

292

Geophysical Fluid Dynamics Laboratory Portal | Data.gov  

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

Geophysical Fluid Dynamics Laboratory Portal Geophysical Fluid Dynamics Laboratory Portal Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data Geophysical Fluid Dynamics Laboratory Portal Dataset Summary Description Output and documentation from a set of multi-century experiments performed using NOAA/GFDL's climate models. Users can download files, display data file attributes, and graphically display the data. Data sets include those from CM2.X experiments associated with the Intergovernmental Panel on Climate Change Assessment Report (IPCC) and the US Climate Change Science Program (US CCSP). Tags {climate,IPCC,CCSP,pressure,SLP," sea ice","upper-level winds",ozone,"meridional winds","zonal winds",u-wind,v-wind," carbon dioxide"," volcanic",aerosol,grids,"soil moisture"," IPCC",flux,"radiation flux",thickness,radiation,emissivity,longwave,sensible,"latent heat",downwelling,upwelling,temperature,convective,runoff,"water vapor",humidity,cloudiness,transport,"geopotential height",assimilation,salinity,evaporation,freshwater}

293

The frequency of tropopause-level thick and thin cirrus clouds as observed by CALIPSO and the relationship to relative humidity and outgoing longwave radiation  

E-Print Network (OSTI)

Thick cloud frequencies, in percent, for SON............................................ 52 15 DJF thin cirrus frequencies in colored contours at a) 121-hPa, b) 100-hPa, and c) 82-hPa with OLR values of 230 W-m-2 in black... contours......................................................................................... 53 16 MAM thin cirrus frequencies in colored contours at a) 121-hPa, b) 100-hPa, and c) 82-hPa with OLR values of 230 W-m-2...

Cardona, Allison Leanne

2008-10-10T23:59:59.000Z

294

Category:Long-Wave Infrared | Open Energy Information  

Open Energy Info (EERE)

Long-Wave Infrared page? For detailed information on Long-Wave Infrared as exploration techniques, click here. Category:Long-Wave Infrared Add.png Add a new Long-Wave Infrared...

295

TWEET: an envelope detection based broadband ultrasonic ranging system  

Science Journals Connector (OSTI)

Fine-grained location information at long range can benefit many applications of embedded sensor networks and robotics. In this paper, we focus on range estimation - an important prerequisite for fine-grained localization - in the ultrasonic domain for ... Keywords: envelope detection, linear chirp, ultrasonic ranging

Prasant Kumar Misra; Diethelm Ostry; Navinda Kottege; Sanjay Jha

2011-10-01T23:59:59.000Z

296

Broadband Wireless: Promise and Reality Andrew J. Viterbi  

E-Print Network (OSTI)

.S. only second. Of course, population sizes matter with penetration of the U.S. population at about 70 America leads in penetration with 68 % of its population so claiming, whereas Asian penetration is barely 9%, though already exceeding our continent's user numbers and growing at nearly double its rate

Southern California, University of

297

ANZA Real-time Seismic Network The ANZA Broadband and  

E-Print Network (OSTI)

SCI2 HWB FSEFLV MTRP USA Mexico USA Mexico Figure 1. The ANZA seismic as AC power, telephone or computer communications. Each station can operate using solar power and all

Vernon, Frank

298

Software-related Energy Footprint of a Wireless Broadband Module  

E-Print Network (OSTI)

on the power consumption. This opens up for potential energy savings by creating better ap- plications Keywords 3G, Energy footprint, Power consumption, Wireless broad- band 1. INTRODUCTION The battery lifetime on performance with limited battery power, we need to employ every possible power saving mea- sure, including

299

VIMOS total transmission profiles for broad-band filters  

E-Print Network (OSTI)

VIMOS is a wide-field imager and spectrograph mounted on UT3 at the VLT, whose FOV consists of four 7'x8' quadrants. Here we present the measurements of total transmission profiles -- i.e. the throughput of telescope + instrument -- for the broad band filters U, B, V, R, I, and z for each of its four quadrants. Those measurements can also be downloaded from the public VIMOS web-page. The transmission profiles are compared with previous estimates from the VIMOS consortium.

S. Mieske; M. Rejkuba; S. Bagnulo; C. Izzo; G. Marconi

2007-04-13T23:59:59.000Z

300

Time Series Modeling using Mobile Devices and Broadband Internet  

Science Journals Connector (OSTI)

In this paper we present one application included in the Project @DAN, an AdvANced and high secure mobile platform to support the digital economy, that started on November 2001, and is financed by the EUIST-2001-...

Albert Prat; Ignasi Sol; David Remondo; Daniel Martinez; Josep M. Catot

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Spectrally broadband channeled imaging polarimeter using polarization gratings  

E-Print Network (OSTI)

polarimeters (CIP) [1]. Here, we focus on developing the technique of CIP [3-6]. In CIP, the 2-dimensional an instrumentation improvement for CIP, described in our previous publications. For further theoretical derivations version of our white-light CIP, originally based on a modified Sagnac interferometer [8, 9

Dereniak, Eustace L.

302

Dielectric nanostructures for broadband light trapping in organic solar cells  

Science Journals Connector (OSTI)

Organic bulk heterojunction solar cells are a promising candidate for low-cost next-generation photovoltaic systems. However, carrier extraction limitations necessitate thin active...

Raman, Aaswath; Yu, Zongfu; Fan, Shanhui

2011-01-01T23:59:59.000Z

303

Broadband UHF RFID/Sensor Modules for Pervasive Cognition Applications  

E-Print Network (OSTI)

printing, can be used instead of metal etching techniques. In addition, paper is compatible with circuit additional modules like sensors and batteries to be mounted on or embedded in. A fast process like inkjet constant r (~3) is close to air's which means electromagnetic power can penetrate easily even if the RFID

Tentzeris, Manos

304

First test on Photonic Crystal Fiber potential for broadband interferometry  

E-Print Network (OSTI)

-air photonic crystal acting as a cladding. This cladding typically consists of thin cylindrical air holes index difference between core and cladding due to air holes of the photonic crystal. Since astronomical bands. The setup is fed by one of the four sources (Fabry-Perot laser diode under or beyond

Boyer, Edmond

305

Panama City 2003 Broadband Shallow?water Acoustic Coherence Experiments  

Science Journals Connector (OSTI)

In June 2003 a series of acoustic propagation experiments were conducted off the coast of Panama City Florida. The experiments were designed to measure and provide an understand of signal phase and amplitude fluctuations and signal spatial and temporal coherence over several large horizontal and vertical arrays. The propagation measurements were conducted in a water depth of 8.8m and at ranges of 70 m and 150 m. The acoustic measurements cover frequencies from 1 to 140 kHz. The propagation measurements were supported by data obtained by wave rider buoys CTDs thermister chains and current meters. Bottom penetration data was also obtained using a buried hydrophone array. The experiments will be outlined and the data sets described.

Steve Stanic; Edgar Kennedy; Dexter Malley; Bob Brown; Roger Meredith; Robert Fisher; Howard Chandler; Richard Ray; Ralph Goodman

2004-01-01T23:59:59.000Z

306

Re: DOE Request for Information - Implementing the National Broadband...  

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

or "DOE") regarding the current and future communications requirements of utilities, including, but not limited to, the requirements of the Smart Grid, in an effort to...

307

Re: DOE Request for Information - Implementing the National Broadband...  

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

or "DOE") regarding the current and future communications requirements of utilities, including, but not limited to, the requirements of the Smart Grid in an effort to...

308

Broadband dye-sensitized upconversion of near-infrared light  

E-Print Network (OSTI)

of the fundamental factors limiting the energy conversion efficiency of a single-junction solar cell to the Shockley by the dye-sensitized nanoparticles is dramatically enhanced (by a factor of 3,300) as a result of increased­ Queisser limit of 32% is the inability to absorb photons with energy less than the bandgap of the active

309

A Broadband Tensorial Magnetotelluric Study In The Travale Geothermal...  

Open Energy Info (EERE)

to 2 km) of conducting (< 1 ohm m in some locations) cover formations and of the intensity of the artificial disturbances from local power stations and distribution lines....

310

Discrimination of UXO in Soil Using Broadband Polarimetric GPR Backscatter  

E-Print Network (OSTI)

. INTRODUCTION Buried unexploded ordnance currently poses an enormous problem worldwide. It requires innovative surveying, classification, risk assessment, and remediation approaches [1]. It has been estimated for remediation, and at the present time some 70% of costs are consumed by careful excavation of "dry holes

Shubitidze, Fridon

311

An innovative tri-directional broadband piezoelectric energy harvester  

SciTech Connect

This paper presents a tri-directional piezoelectric energy harvester that is able to harvest vibration energy over a wide bandwidth from three orthogonal directions. The harvester consists of a main beam, an auxiliary beam, and a spring-mass system, with magnets integrated to introduce nonlinear force and couple the three sub-systems. Theoretical analysis and experiments were performed at constant acceleration under frequency sweeps to acquire frequency responses. The experimental results show that the voltage can achieve more than 2?V over more than 5?Hz of bandwidth with 1 M? load in the three orthogonal directions.

Su, Wei-Jiun, E-mail: weijiun@mie.utoronto.ca; Zu, Jean [Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8 (Canada)] [Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8 (Canada)

2013-11-11T23:59:59.000Z

312

Broadband chaos generated by an opto-electronic oscillator  

E-Print Network (OSTI)

We study an opto-electronic time-delay oscillator that displays high-speed chaotic behavior with a flat, broad power spectrum. The chaotic state coexists with a linearly-stable fixed point, which, when subjected to a finite-amplitude perturbation, loses stability initially via a periodic train of ultrafast pulses. We derive an approximate map that does an excellent job of capturing the observed instability. The oscillator provides a simple device for fundamental studies of time-delay dynamical systems and can be used as a building block for ultra-wide-band sensor networks.

Kristine E. Callan; Lucas Illing; Zheng Gao; Daniel J. Gauthier; Eckehard Schll

2009-01-26T23:59:59.000Z

313

Leica TCS SP5 The Only Broadband Confocal  

E-Print Network (OSTI)

: maximal transmissive and spectrally adaptive · Illumination regimes switchable in microseconds: for fast dynamic measurements · Beam splitting for new dyes or laser lines instantly: comfortable and cost Routing for Multiphoton Laser G Multiphoton Laser 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1a 1b 16 2 15 2 3

Adams, Mark

314

The Political Economies of Broadband Development in Korea and Japan  

E-Print Network (OSTI)

the game is nothing new to Japan and Korea. Both saw rapid17,000 to 1.6 million. 7 Japan followed suit in the earlyDSL was ?rst introduced, Japan was among the most expensive

Kushida, Kenji; Oh, Seung-Youn

2007-01-01T23:59:59.000Z

315

Descent of the ancient Farallon slab drives localized mantle flow below the New Madrid seismic zone  

E-Print Network (OSTI)

the possibility of future damaging earth- quakes. [5] In this letter we argue that downwelling mantle flow

Long, Bernard

316

Procedure for Generating Data Quality Reports for SIRS Radiometric Measurements  

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

Procedure for Generating Data Quality Reports Procedure for Generating Data Quality Reports for SIRS Radiometric Measurements M. H. L. Anderberg, F. P. Rael, and T. L. Stoffell National Renewable Energy Laboratory Golden, Colorado Introduction The Atmospheric Radiation Measurement (ARM) Program needs high-quality broadband shortwave (SW) (solar) and longwave (LW) irradiance information for the development and validation of atmospheric circulation and climate models. To this end, the National Renewable Energy Laboratory (NREL) performs a quality assessment of the data from 22 Solar Infrared Stations (SIRS) in the Southern Great Plains (SGP). Data quality reports (DQRs) are instrumental in passing the resultant information to the scientific community. The value of these reports depends on clear and consistent

317

Section 117  

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

Validation of GOES-7 to a Radiation Budget for April and Validation of GOES-7 to a Radiation Budget for April and July 1994 ARM/IOP Using ScaRaB/Meteor-3/7 Data A. Trishchenko and Z. Li Canada Centre for Remote Sensing Ottawa, Ontario, Canada Abstract Data from the ScaRaB radiometer flown on board the Meteor- 3/7 satellite were employed for validating a TOA Earth radiation budget product generated from GOES-7 for the Atmospheric Radiation Measurement (ARM) Program. Com- parisons were made between coincident and collocated short- wave and long-wave radiative quantities derived from ScaRaB and GOES sensors over the Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site in Oklahoma, U.S.A., during April and July 1994. Calibrations for both visible and infrared window channels appear to be adequate, but narrow- to broad-band conversion of short-wave measure-

318

ARM STM Plenary: CS Report  

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

8 8 ARM Science Team Meeting 2008 Warren Wiscombe ARM Chief Scientist Brookhaven National Lab Mar 2008 ARM Plenary 2 ARM Chief Scientist Team ARM Chief Scientist Team Ric Cederwall Andy Vogelmann Sharon Zuhoski Yangang Liu Pavlos Kollias Mar 2008 ARM Plenary 3 Submit your... Submit your... science highlights (www.arm.gov) poster PDFs (esp if you win CS Design Award) feedback in text boxes on ARM web pages Also... vote for People's Choice Poster talk to our Thu morning speakers Mar 2008 ARM Plenary 4 Mar 2008 ARM Plenary 5 Existing Existing * CLOWD (Clouds with Low Optical Depth) * BBHRP (BroadBand Heating Rate Profile) * Radar Focus Groups Focus Groups New New * Vertical Velocity for Climate Modelers * Longwave/Microwave * Surface Fluxes Mar 2008 ARM Plenary 6 ARM ARM ' ' s s two fundamental science questions

319

ARM - Datastreams - ruc20hybr  

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

hybr hybr Documentation XDC documentation Data Quality Plots 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 Datastream : RUC20HYBR Rapid Update Cycle (RUC) model: daily hybrid analysis data, 20 km resolution Active Dates 2002.04.18 - 2012.05.01 Measurement Categories Atmospheric State, Cloud Properties, Radiometric, Surface Properties Originating Instrument Rapid Update Cycle Model Data (RUC) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Convection cape Convection cape255 Convection cinhib Convection cinhib255 Latent heat flux fluxlatentsrf Longwave broadband net irradiance fluxlwnetsrf Sensible heat flux fluxsensiblesrf

320

ARM - Publications: Science Team Meeting Documents  

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

Cloud Radiative Forcing of the Arctic Surface: The Influence of Cloud Cloud Radiative Forcing of the Arctic Surface: The Influence of Cloud Properties, Surface Albedo, and Solar Zenith Angle Shupe, M.D. and Intrieri, J.M., NOAA - Environmental Technology Laboratory Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting An annual cycle of cloud and radiation measurements made as part of the Surface Heat Budget of the Arctic program are utilized to determine which properties of Arctic clouds control the surface radiation balance. Surface cloud radiative forcing (CF), defined as the difference between the all-sky net surface radiative flux and the clear sky net surface flux, was calculated from measurements of broadband fluxes and results from a clear sky model. Longwave cloud forcing (CFLW) is shown to be a function of cloud

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

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

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

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

322

ARM - Facility News Article  

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

May 15, 2008 [Data Announcements, Facility News] May 15, 2008 [Data Announcements, Facility News] Announcing the Release of the Radiative Flux Analysis PI Product Bookmark and Share Developed by Dr. Chuck Long, Radiative Flux Analysis PI Product data are now available from the ARM Climate Research Facility Archive. The current release includes data for all of the ARM fixed sites (except Darwin, which requires manual processing because of the monsoon season) plus data for the AMF deployments at Pt. Reyes and the COPS Black Forest site. Future releases will include data for Darwin, the COPS Hornisgrinde and Rhine Valley sites, and the AMF Niamey deployment. The Radiative Flux Analysis is a technique for using surface shortwave (SW) and longwave (LW) broadband radiation measurements for detecting periods of

323

Contribution to the development of DOE ARM Climate Modeling Best Estimate Data (CMBE) products: Satellite data over the ARM permanent and AMF sites: Final Report  

SciTech Connect

To support the LLNL ARM infrastructure team Climate Modeling Best Estimate (CMBE) data development, the University of North Dakota (UND)'s group will provide the LLNL team the NASA CERES and ISCCP satellite retrieved cloud and radiative properties for the periods when they are available over the ARM permanent research sites. The current available datasets, to date, are as follows: the CERES/TERRA during 200003-200812; the CERES/AQUA during 200207-200712; and the ISCCP during 199601-200806. The detailed parameters list below: (1) CERES Shortwave radiative fluxes (net and downwelling); (2) CERES Longwave radiative fluxes (upwelling) - (items 1 & 2 include both all-sky and clear-sky fluxes); (3) CERES Layered clouds (total, high, middle, and low); (4) CERES Cloud thickness; (5) CERES Effective cloud height; (6) CERES cloud microphysical/optical properties; (7) ISCCP optical depth cloud top pressure matrix; (8) ISCCP derived cloud types (r.g., cirrus, stratus, etc.); and (9) ISCCP infrared derived cloud top pressures. (10) The UND group shall apply necessary quality checks to the original CERES and ISCCP data to remove suspicious data points. The temporal resolution for CERES data should be all available satellite overpasses over the ARM sites; for ISCCP data, it should be 3-hourly. The spatial resolution is the closest satellite field of view observations to the ARM surface sites. All the provided satellite data should be in a format that is consistent with the current ARM CMBE dataset so that the satellite data can be easily merged into the CMBE dataset.

Xie, B; Dong, X; Xie, S

2012-05-18T23:59:59.000Z

324

Evaluating Radiative Closure in the Middle-to-Upper Troposhere  

SciTech Connect

This project had two general objectives. The first is the characterization and improvement of the radiative transfer parameterization in strongly absorbing water vapor bands, as these strongly absorbing bands dictate the clear sky radiative heating rate. The second is the characterization and improvement of the radiative transfer in cirrus clouds, with emphasis on ensuring that the parameterization of the radiative transfer is consistent and accurate across the spectrum. Both of these objectives are important for understanding the radiative processes in the mid-to-upper troposphere. The research on this project primarily involved analysis of data from the First and Second Radiative Heating in Underexplored Bands Campaigns, RHUBC-I and II. This included a climate model sensitivity study using results from RHUBC-I. The RHUBC experiments are ARM-funded activities that directly address the objectives of this research project. A secondary effort was also conducted that investigated the trends in the long-term (~14 year) dataset collected by the Atmospheric Emitted Radiance Interferometer (AERI) at the ARM Southern Great Plains site. This work, which was primarily done by a post-doc at the University of Wisconsin ???????¢???????????????? Madison under Dr. Turner???????¢????????????????s direction, uses the only NIST-traceable instrument at the ARM site that has a well-documented calibration and uncertainty performance to investigate long-term trends in the downwelling longwave radiance above this site.

Tobin, David C; Turner, David D; Knuteson, Robert O

2013-01-02T23:59:59.000Z

325

ARM - Datastreams - usdauvmfrsr  

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

Datastreamsusdauvmfrsr Datastreamsusdauvmfrsr Documentation XDC documentation Data Quality Plots 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 Datastream : USDAUVMFRSR UV MFRSR data from USDA Active Dates 1999.02.17 - 2014.01.07 Measurement Categories Radiometric Originating Instrument US Department of Agriculture (USDA) Radiation Monitoring Data (USDARAD) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Shortwave narrowband diffuse downwelling irradiance difhorrad300 Shortwave narrowband diffuse downwelling irradiance difhorrad305 Shortwave narrowband diffuse downwelling irradiance difhorrad311 Shortwave narrowband diffuse downwelling irradiance

326

ARM - Datastreams - usdarad  

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

Datastreamsusdarad Datastreamsusdarad Documentation XDC documentation Data Quality Plots 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 Datastream : USDARAD Visible MFRSR data from USDA Active Dates 1999.02.17 - 2014.01.07 Measurement Categories Radiometric Originating Instrument US Department of Agriculture (USDA) Radiation Monitoring Data (USDARAD) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Shortwave narrowband diffuse downwelling irradiance difhorizrad415 Shortwave narrowband diffuse downwelling irradiance difhorizrad500 Shortwave narrowband diffuse downwelling irradiance difhorizrad610 Shortwave narrowband diffuse downwelling irradiance

327

Research Highlight  

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

Turner DD and PJ Gero. 2011. "Downwelling infrared radiance temperature climatology for the Atmospheric Radiation Measurement Southern Great Plains site." Journal of...

328

uav_scie  

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

Valero - the radiometers were the four combinations of upwelling and downwelling, solar and thermal. Valero, Gore, and Giver, 1982; Valero, Ackerman, and Gore, 1989; and...

329

Testing Climate Models Using Thermal Infrared Spectra  

Science Journals Connector (OSTI)

An approach to test climate models with observations is presented. In this approach, it is possible to directly observe the longwave feedbacks of the climate system in time series of annual average outgoing longwave spectra. Tropospheric ...

Stephen Leroy; James Anderson; John Dykema; Richard Goody

2008-05-01T23:59:59.000Z

330

MULTISCALE THERMAL-INFRARED MEASUREMENTS OF THE MAUNA LOA CALDERA, HAWAII  

SciTech Connect

Until recently, most thermal infrared measurements of natural scenes have been made at disparate scales, typically 10{sup {minus}3}-10{sup {minus}2} m (spectra) and 10{sup 2}-10{sup 3} m (satellite images), with occasional airborne images (10{sup 1} m) filling the gap. Temperature and emissivity fields are spatially heterogeneous over a similar range of scales, depending on scene composition. A common problem for the land surface, therefore, has been relating field spectral and temperature measurements to satellite data, yet in many cases this is necessary if satellite data are to be interpreted to yield meaningful information about the land surface. Recently, three new satellites with thermal imaging capability at the 10{sup 1}-10{sup 2} m scale have been launched: MTI, TERRA, and Landsat 7. MTI acquires multispectral images in the mid-infrared (3-5{micro}m) and longwave infrared (8-10{micro}m) with 20m resolution. ASTER and MODIS aboard TERRA acquire multispectral longwave images at 90m and 500-1000m, respectively, and MODIS also acquires multispectral mid-infrared images. Landsat 7 acquires broadband longwave images at 60m. As part of an experiment to validate the temperature and thermal emissivity values calculated from MTI and ASTER images, we have targeted the summit region of Mauna Loa for field characterization and near-simultaneous satellite imaging, both on daytime and nighttime overpasses, and compare the results to previously acquired 10{sup {minus}1} m airborne images, ground-level multispectral FLIR images, and the field spectra. Mauna Loa was chosen in large part because the 4x6km summit caldera, flooded with fresh basalt in 1984, appears to be spectrally homogeneous at scales between 10{sup {minus}1} and 10{sup 2} m, facilitating the comparison of sensed temperature. The validation results suggest that, with careful atmospheric compensation, it is possible to match ground measurements with measurements from space, and to use the Mauna Loa validation site for cross-comparison of thermal infrared sensors and temperature/emissivity extraction algorithms.

L. BALICK; A. GILLESPIE; ET AL

2001-03-01T23:59:59.000Z

331

E-Print Network 3.0 - atmospheric greenhouse gases Sample Search...  

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

to longwave radiation 12;Greenhouse Gases Polyatomic molecules... the greenhouse effect ... Source: Frierson, Dargan - Department of Atmospheric Sciences, University of...

332

Broadband calibrated scattering parameters characterization of a superconducting quantum interference device amplifier  

SciTech Connect

In this work, we characterize the 2-port scattering parameters of a superconducting quantum interference device amplifier at {approx}20 mK over several gigahertz of bandwidth. The measurement reference plane is positioned on a 6.25 {Omega} microstrip line situated directly at the input and output of the device by means of a thru-reflect-line cryogenic calibration procedure. From the scattering parameters, we derive the device available power gain, isolation, and input impedance over the 2-8 GHz range. This measurement methodology provides a path towards designing wide-band matching circuits for low impedance superconducting amplifiers operating at dilution refrigerator temperatures.

Ranzani, Leonardo [National Institute of Standards and Technology, Boulder, Colorado 80305 (United States); University of Colorado at Boulder, Boulder, Colorado 80309 (United States); Spietz, Lafe; Aumentado, Jose [National Institute of Standards and Technology, Boulder, Colorado 80305 (United States)

2013-07-08T23:59:59.000Z

333

LPTV-Aware Bit Loading and Channel Estimation in Broadband PLC for Smart Grid  

E-Print Network (OSTI)

Power line communication (PLC) has received steady interest over recent decades because of its economic use of existing power lines, and is one of the communication technologies envisaged for Smart Grid (SG) infrastructure. However, power lines...

Tunc, Muharrem Ali

2014-05-31T23:59:59.000Z

334

Broadband and omnidirectional anti-reflection layer for III/V multi-junction solar cells  

E-Print Network (OSTI)

We report a novel graded refractive index antireflection coating for III/V quadruple solar cells based on bottom-up grown tapered GaP nanowires. We have calculated the photocurrent density of an InGaP-GaAs-InGaAsP-InGaAs solar cell with a MgF2/ZnS double layer antireflection coating and with a graded refractive index coating. The photocurrent density can be increased by 5.9 % when the solar cell is coated with a graded refractive index layer with a thickness of 1\\mu m. We propose to realize such a graded refractive index layer by growing tapered GaP nanowires on III/V solar cells. For a first demonstration of the feasibility of the growth of tapered nanowires on III/V solar cells, we have grown tapered GaP nanowires on AlInP/GaAs substrates. We show experimentally that the reflection from the nanowire coated substrate is reduced and that the transmission into the substrate is increased for a broad spectral and angular range.

Diedenhofen, Silke L; Haverkamp, Erik; Bauhuis, Gerard; Schermer, John; Rivas, Jaime Gmez; 10.1016/j.solmat.2012.02.022

2012-01-01T23:59:59.000Z

335

Broadband optical coupling between microstructured fibers and photonic band gap circuits: Two-dimensional paradigms  

E-Print Network (OSTI)

simple two-dimensional design models. We demonstrate an effective large- bandwidth small-footprint beam platform for integrated optics. Unlike conventional paradigms such as silicon on insulator SOI waveguides that guide light on a chip by total internal reflection index guiding , PBG-based microcircuits can guide

John, Sajeev

336

The broad-band fractal nature of heterogeneity in the upper crust from petrophysical logs  

Science Journals Connector (OSTI)

......order of kilometres and anisotropic, being over four times...measurements of standstones, shales and carbonates, J...order of kilometres and anisotropic, being over four times...and ACKNOWLEDGMENTS anisotropic. Exact values are difficult...measurements of standstones, shales and carbonates, J......

Sean S. Dolan; Christopher J. Bean; Bruno Riollet

1998-03-01T23:59:59.000Z

337

Accelerating the Execution of Matrix Languages on the Cell Broadband Engine Architecture  

E-Print Network (OSTI)

Matrix languages, including MATLAB and Octave, are established standards for applications in science and engineering. They provide interactive programming environments that are easy to use due to their script languages with matrix data types. Current implementations of matrix languages do not fully utilize high-performance, special-purpose chip architectures such as the IBM PowerXCell processor (Cell), which is currently used in the fastest computer in the world. We present a new framework that extends Octave to harvest the computational power of the Cell. With this framework the programmer is alleviated of the burden of introducing explicit notions of parallelism. Instead the programmer uses a new matrix data-type to execute matrix operations in parallel on the synergistic processing elements (SPEs) of the Cell. We employ lazy evaluation semantics for our new matrix data-type to obtain execution traces of matrix operations. Traces are converted to data dependence graphs; operations in the data dependence gra...

Khoury, Raymes; Scholz, Bernhard

2009-01-01T23:59:59.000Z

338

3-D Model of Broadband Emission from Supernova Remnants Undergoing Non-linear Diffusive Shock Acceleration  

SciTech Connect

We present a 3-dimensional model of supernova remnants (SNRs) where the hydrodynamical evolution of the remnant is modeled consistently with nonlinear diffusive shock acceleration occurring at the outer blast wave. The model includes particle escape and diffusion outside of the forward shock, and particle interactions with arbitrary distributions of external ambient material, such as molecular clouds. We include synchrotron emission and cooling, bremsstrahlung radiation, neutral pion production, inverse-Compton (IC), and Coulomb energy-loss. Boardband spectra have been calculated for typical parameters including dense regions of gas external to a 1000 year old SNR. In this paper, we describe the details of our model but do not attempt a detailed fit to any specific remnant. We also do not include magnetic field amplification (MFA), even though this effect may be important in some young remnants. In this first presentation of the model we don't attempt a detailed fit to any specific remnant. Our aim is to develop a flexible platform, which can be generalized to include effects such as MFA, and which can be easily adapted to various SNR environments, including Type Ia SNRs, which explode in a constant density medium, and Type II SNRs, which explode in a pre-supernova wind. When applied to a specific SNR, our model will predict cosmic-ray spectra and multi-wavelength morphology in projected images for instruments with varying spatial and spectral resolutions. We show examples of these spectra and images and emphasize the importance of measurements in the hard X-ray, GeV, and TeV gamma-ray bands for investigating key ingredients in the acceleration mechanism, and for deducing whether or not TeV emission is produced by IC from electrons or pion-decay from protons.

Lee, Shiu-Hang; Kamae, Tuneyoshi; Ellison, Donald C.

2008-07-02T23:59:59.000Z

339

Toward a Broadband Astro-comb: Effects of Nonlinear Spectral Broadening in Optical Fibers  

E-Print Network (OSTI)

on an Yb-fiber source comb (with 1 GHz repetition rate) that is filtered by double-passing through a low for Astrophysics, Harvard University, 60 Garden St. Cambridge MA 02138 3 Department of Physics, Harvard University by using a filtering cavity configured for double-pass. As an explicit example, we present a design based

Walsworth, Ronald L.

340

Beam manipulation and compression using broadband rf systems in the Fermilab Main Injector and Recycler  

SciTech Connect

A novel method for beam manipulation, compression, and stacking using a broad band RF system in circular accelerators is described. The method uses a series of linear voltage ramps in combination with moving barrier pulses to azimuthally compress, expand, or cog the beam. Beam manipulations can be accomplished rapidly and, in principle, without emittance growth. The general principle of the method is discussed using beam dynamics simulations. Beam experiments in the Fermilab Recycler Ring convincingly validate the concept. Preliminary experiments in the Fermilab Main Injector to investigate its potential for merging two ''booster batches'' to produce high intensity proton beams for neutrino and antiproton production are described.

G William Foster et al.

2004-07-09T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

The Anza array: A high-dynamic-range, broadband, digitally radiotelemetered seismic array  

Science Journals Connector (OSTI)

...interrupts that occur for each data word received. With 10 three-component stations, these interrupts occur on average every 133 usec, but on occasion as often as every 83 ~sec. Secondarily, the TIU is assigned the task of attaching a clock time to the data...

Jon Berger; L. M. Baker; J. N. Brune; J. B. Fletcher; T. C. Hanks; F. L. Vernon III

342

Digital Signal Processing using Stream High Performance Computing: A 512-input Broadband Correlator for Radio Astronomy  

E-Print Network (OSTI)

A "large-N" correlator that makes use of Field Programmable Gate Arrays and Graphics Processing Units has been deployed as the digital signal processing system for the Long Wavelength Array station at Owens Valley Radio Observatory (LWA-OV), to enable the Large Aperture Experiment to Detect the Dark Ages (LEDA). The system samples a ~100MHz baseband and processes signals from 512 antennas (256 dual polarization) over a ~58MHz instantaneous sub-band, achieving 16.8Tops/s and 0.236 Tbit/s throughput in a 9kW envelope and single rack footprint. The output data rate is 260MB/s for 9 second time averaging of cross-power and 1 second averaging of total-power data. At deployment, the LWA-OV correlator was the largest in production in terms of N and is the third largest in terms of complex multiply accumulations, after the Very Large Array and Atacama Large Millimeter Array. The correlator's comparatively fast development time and low cost establish a practical foundation for the scalability of a modular, heterogeneo...

Kocz, J; Barsdell, B R; Price, D; Bernardi, G; Bourke, S; Clark, M A; Craig, J; Dexter, M; Dowell, J; Eftekhari, T; Ellingson, S; Hallinan, G; Hartman, J; Jameson, A; MacMahon, D; Taylor, G; Schinzel, F; Werthimer, D

2014-01-01T23:59:59.000Z

343

QUASI-PERIODIC OSCILLATIONS AND BROADBAND VARIABILITY IN SHORT MAGNETAR BURSTS  

SciTech Connect

The discovery of quasi-periodic oscillations (QPOs) in magnetar giant flares has opened up prospects for neutron star asteroseismology. However, with only three giant flares ever recorded, and only two with data of sufficient quality to search for QPOs, such analysis is seriously data limited. We set out a procedure for doing QPO searches in the far more numerous, short, less energetic magnetar bursts. The short, transient nature of these bursts requires the implementation of sophisticated statistical techniques to make reliable inferences. Using Bayesian statistics, we model the periodogram as a combination of red noise at low frequencies and white noise at high frequencies, which we show is a conservative approach to the problem. We use empirical models to make inferences about the potential signature of periodic and QPOs at these frequencies. We compare our method with previously used techniques and find that although it is on the whole more conservative, it is also more reliable in ruling out false positives. We illustrate our Bayesian method by applying it to a sample of 27 bursts from the magnetar SGR J0501+4516 observed by the Fermi Gamma-ray Burst Monitor, and we find no evidence for the presence of QPOs in any of the bursts in the unbinned spectra, but do find a candidate detection in the binned spectra of one burst. However, whether this signal is due to a genuine quasi-periodic process, or can be attributed to unmodeled effects in the noise is at this point a matter of interpretation.

Huppenkothen, Daniela; Watts, Anna L.; Uttley, Phil; Van der Horst, Alexander J.; Van der Klis, Michiel [Astronomical Institute ''Anton Pannekoek'', University of Amsterdam, Postbus 94249, 1090-GE Amsterdam (Netherlands); Kouveliotou, Chryssa [Office of Science and Technology, ZP12, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Goegues, Ersin [Sabanc Latin-Small-Letter-Dotless-I University, Orhanl Latin-Small-Letter-Dotless-I -Tuzla, Istanbul 34956 (Turkey); Granot, Jonathan [The Open University of Israel, 1 University Road, P.O. Box 808, Ra'anana 43537 (Israel); Vaughan, Simon [X-Ray and Observational Astronomy Group, University of Leicester, Leicester LE1 7RH (United Kingdom); Finger, Mark H., E-mail: D.Huppenkothen@uva.nl [Universities Space Research Association, Huntsville, AL 35805 (United States)

2013-05-01T23:59:59.000Z

344

Broadband and statistical characterization of echoes from random scatterers : application to acoustic scattering by marine organisms  

E-Print Network (OSTI)

The interpretation of echoes collected by active remote-sensing systems, such as sonar and radar, is often ambiguous due to the complexities in the scattering processes involving the scatterers, the environment, and the ...

Lee, Wu-Jung

2013-01-01T23:59:59.000Z

345

Deep Broadband Observations of the Distant Gamma-ray Blazar PKS 1424+240  

E-Print Network (OSTI)

We present deep VERITAS observations of the blazar PKS 1424+240, along with contemporaneous Fermi Large Area Telescope, Swift X-ray Telescope and Swift UV Optical Telescope data between 2009 February 19 and 2013 June 8. This blazar resides at a redshift of $z\\ge0.6035$, displaying a significantly attenuated gamma-ray flux above 100 GeV due to photon absorption via pair-production with the extragalactic background light. We present more than 100 hours of VERITAS observations from three years, a multiwavelength light curve and the contemporaneous spectral energy distributions. The source shows a higher flux of (2.1$\\pm0.3$)$\\times10^{-7}$ ph m$^{-2}$s$^{-1}$ above 120 GeV in 2009 and 2011 as compared to the flux measured in 2013, corresponding to (1.02$\\pm0.08$)$\\times10^{-7}$ ph m$^{-2}$s$^{-1}$ above 120 GeV. The measured differential very high energy (VHE; $E\\ge100$ GeV) spectral indices are $\\Gamma=$3.8$\\pm$0.3, 4.3$\\pm$0.6 and 4.5$\\pm$0.2 in 2009, 2011 and 2013, respectively. No significant spectral change...

Archambault, S; Behera, B; Beilicke, M; Benbow, W; Berger, K; Bird, R; Biteau, J; Bugaev, V; Byrum, K; Cardenzana, J V; Cerruti, M; Chen, X; Ciupik, L; Connolly, M P; Cui, W; Dumm, J; Errando, M; Falcone, A; Federici, S; Feng, Q; Finley, J P; Fleischhack, H; Fortson, L; Furniss, A; Galante, N; Gillanders, G H; Griffin, S; Griffiths, S T; Grube, J; Gyuk, G; Hanna, D; Holder, J; Hughes, G; Humensky, T B; Johnson, C A; Kaaret, P; Kertzman, M; Khassen, Y; Kieda, D; Krawczynski, H; Krennrich, F; Kumar, S; Lang, M J; Madhavan, A S; Maier, G; McCann, A; Meagher, K; Moriarty, P; Mukherjee, R; Nieto, D; de Bhroithe, A O'Faolain; Ong, R A; Otte, A N; Park, N; Pohl, M; Popkow, A; Prokoph, H; Quinn, J; Ragan, K; Rajotte, J; Reyes, L C; Reynolds, P T; Richards, G T; Roache, E; Sembroski, G H; Shahinyan, K; Staszak, D; Telezhinsky, I; Tucci, J V; Tyler, J; Varlotta, A; Vassiliev, V V; Vincent, S; Wakely, S P; Weinstein, A; Welsing, R; Wilhelm, A; Williams, D A; Ackermann, M; Ajello, M; Albert, A; Baldini, L; Bastieri, D; Bellazzini, R; Bissaldi, E; Bregeon, J; Buehler, R; Buson, S; Caliandro, G A; Cameron, R A; Caraveo, P A; Cavazzuti, E; Charles, E; Chiang, J; Ciprini, S; Claus, R; Cutini, S; D'Ammando, F; de Angelis, A; de Palma, F; Dermer, C D; Digel, S W; Di Venere, L; Drell, P S; Favuzzi, C; Franckowiak, A; Fusco, P; Gargano, F; Gasparrini, D; Giglietto, N; Giordano, F; Giroletti, M; Grenier, I A; Guiriec, S; Jogler, T; Kuss, M; Larsson, S; Latronico, L; Longo, F; Loparco, F; Lubrano, P; Madejski, G M; Mayer, M; Mazziotta, M N; Michelson, P F; Mizuno, T; Monzani, M E; Morselli, A; Murgia, S; Nuss, E; Ohsugi, T; Ormes, J F; Perkins, J S; Piron, F; Pivato, G; Raino, S; Razzano, M; Reimer, A; Reimer, O; Ritz, S; Schaal, M; Sgro, C; Siskind, E J; Spinelli, P; Takahashi, H; Tibaldo, L; Tinivella, M; Troja, E; Vianello, G; Werner, M; Wood, M

2014-01-01T23:59:59.000Z

346

Broadband Single-Shot Electron Spectrometer for GeV-Class Laser Plasma Based Accelerators  

E-Print Network (OSTI)

of the 2007 Particle Accelerator Conference, p. 2978,Class Laser Plasma Based Accelerators K. Nakamura, ? W. Wan,Laser-plasma-based accelerators can provide electrons over a

Nakamura, K.

2008-01-01T23:59:59.000Z

347

Thermal Modeling and Experimental Validation of Human Hair and Skin Heated by Broadband Light  

E-Print Network (OSTI)

distribution within the hair follicle is highly non-uniform: the minimum temperature occurs at the follicle Sun, PhD,1 Alex Chaney,1 Robert Anderson, PhD,2 and Guillermo Aguilar, PhD 1 * 1 Department:(a)determinetheoveralleffectofPPxonskinhumidi- tyandassociatedskinopticalproperties,and;(b)developaPT numerical model to study the spatial and temporal hair and skin temperature

Aguilar, Guillermo

348

Analog Baseband Filters and Mixed Signal Circuits for Broadband Receiver Systems  

E-Print Network (OSTI)

to design of multi-million transistor system-on-chip (SoC) solutions with remarkable digital signal processing and memory capabilities. Low power mobile handheld devices featuring instant access to voice, video and Internet are one example of a... of a modern wireless device. The first part of this work (Sections 2, 3 and 4) addresses some of the research challenges for low power wireless communication devices. Section 2 provides an in- troduction to modern digital and analog communication...

Kulkarni, Raghavendra Laxman

2012-02-14T23:59:59.000Z

349

A compact broadband multilayer patch antenna and its applications for phased arrays  

E-Print Network (OSTI)

coupled II-shaped feed with a U-slotted patch antenna. The simulated H-plane cross polarization was too low to show on Figure 25 to Figure 27. cccup15dlv. sp cccup20dhv sp ? ? cccup25div. sp 150 100 50 4 -10 hn -12 14 18 20 8. 5 9 9. 5 10 10 5...

Kidder, Charles Crandall

2012-06-07T23:59:59.000Z

350

Enhanced broadband excited upconversion luminescence in Ho-doped glasses by codoping with bismuth  

Science Journals Connector (OSTI)

We report enhanced green and red upconversion (UC) luminescence in Ho3+-doped oxyfluoride germanate glass by introducing bismuth near-infrared active centers as sensitizers....

Xu, Beibei; Bai, Gongxun; Wang, Juechen; Guo, Qiangbing; Tan, Dezhi; Chen, Weibo; Liu, Xiaofeng; Zhou, Shifeng; Hao, Jianhua; Qiu, Jianrong

2014-01-01T23:59:59.000Z

351

A low power, high dynamic-range, broadband variable gain amplifier for an ultra wideband receiver  

E-Print Network (OSTI)

A fully differential Complementary Metal-Oxide Semiconductor (CMOS) Variable Gain Amplifier (VGA) consisting of complementary differential pairs with source degeneration, a current gain stage with programmable current mirror, and resistor loads...

Chen, Lin

2007-09-17T23:59:59.000Z

352

Dynamically polarized hydrogen target as a broadband, wavelength-independent thermal neutron spin polarizer  

SciTech Connect

A hydrogen-rich sample with dynamically polarized hydrogen nuclei was tested as a wavelength-independent neutron transmission spin polarizer. The experiment used a modified setup of the dynamic nuclear polarization target station at the GKSS research center. The standard solvent sample at the GKSS DNP station was used. It is 2.8 mm thick and consists of 43.4 wt% water, 54.6 wt% glycerol, and 2 wt% of EHBA-Cr(v) complex. The wavelength of the incident neutrons for the transmission experiment was {lambda} = 8.1 {angstrom} with {Delta}{lambda}/{lambda} = 10%. The polarization of neutron beam after the target sample was analyzed with a supermirror analyzer. A neutron polarization of -52% was achieved at the hydrogen polarization of -69%. Further experiments will test the feasibility of other hydrogen-rich materials, such as methane, as the polarizer. A theoretical calculation shows that a polarized methane target would allow over 95% neutron polarizations with more than 30% transmission.

Zhao, Jinkui [ORNL; Garamus, VM [GKSS Research Center, Germany; Mueller, W [GKSS Research Center, Germany; Willumeit, R [GKSS Research Center, Germany

2005-01-01T23:59:59.000Z

353

ASTRO-H White Paper - Broad-band Spectroscopy and Polarimetry  

E-Print Network (OSTI)

The broad energy range spanned by ASTRO-H instruments, from ~0.3 to 600 keV, with its high spectral resolution calorimeter and sensitive hard X-ray imaging, offers unique opportunities to study black holes and their environments. The ability to measure polarization is particularly novel, with potential sources including blazars, Galactic pulsars and X-ray binaries. In this White Paper, we present an overview of the synergistic instrumental capabilities and the improvements over prior missions. We also show how ASTRO-H fits into the multi-wavelength landscape. We present in more detail examples and simulations of key science ASTRO-H can achieve in a typical 100 ksec observation when data from all four instruments are combined. Specifically, we consider observations of black-hole source (Cyg X-1 and GRS 1915+105), blazars (Mrk 421 and Mrk 501), a quasar (3C 273), radio galaxies (Centaurus A and 3C 120), and active galaxies with a strong starburst (Circinus and NGC 4945). We will also address possible new discov...

Coppi, P; Done, C; Fukazawa, Y; Gandhi, P; Hagino, K; LaMassa, S; Laurent, P; Madejski, G; Mizuno, T; Mukai, K; Odaka, H; Tajima, H; Tanaka, Y; Tombesi, F; Urry, M

2014-01-01T23:59:59.000Z

354

Ultra-broadband polarisers based on metastable free-standing aligned carbon nanotube membranes  

E-Print Network (OSTI)

by the plasma edge (?p) which was empirically evaluated to be around 4.6 eV [35]. In the practical limit, as the pitch tends toward zero, the upper polarisation of the apparent dense wire grid tends towards that of bulk structured graphites (2.0-7.0 e... acetone bath and rinsed with IPA, DI water and dried with ultra-high purity N2. 101 nm Al2Ox (99.99%) was deposited in a custom-built magnetron sputterer and natively oxidised upon exposure to ambient atmosphere. A 1.00.1 nm Fe (99.95%) catalyst...

Cole, Matthew T.; Doherty, Matthew; Parmee, Richard; Dawson, Paul; Milne, William I.

2014-07-24T23:59:59.000Z

355

A broadband vibrational energy harvester Louis Van Blarigan, Per Danzl, and Jeff Moehlisa)  

E-Print Network (OSTI)

vibrational energy harvesters are com- posed of a mass-spring system with a transducer,1 where vibrations in the surrounding environment act as inputs and cause the spring-mass system to oscillate. The oscillations of buckling, as measured by d. The mount is attached to a voice-coil shaker and shaken vertically

Bigelow, Stephen

356

BROADBAND SPECTROSCOPY USING TWO SUZAKU OBSERVATIONS OF THE HMXB GX 301-2  

SciTech Connect

We present the analysis of two Suzaku observations of GX 301-2 at two orbital phases after the periastron passage. Variations in the column density of the line-of-sight absorber are observed, consistent with accretion from a clumpy wind. In addition to a cyclotron resonance scattering feature (CRSF), multiple fluorescence emission lines were detected in both observations. The variations in the pulse profiles and the CRSF throughout the pulse phase have a signature of a magnetic dipole field. Using a simple dipole model we calculated the expected magnetic field values for different pulse phases and were able to extract a set of geometrical angles, loosely constraining the dipole geometry in the neutron star. From the variation of the CRSF width and energy, we found a geometrical solution for the dipole, making the inclination consistent with previously published values.

Suchy, Slawomir; Markowitz, Alex; Rothschild, Richard E. [Center for Astrophysics and Space Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0424 (United States); Fuerst, Felix; Kreykenbohm, Ingo; Wilms, Joern [Dr. Karl Remeis Sternwarte and Erlangen Center for Astroparticle Physics, Sternwartstr. 7, 96049 Bamberg (Germany); Pottschmidt, Katja [Center for Space Science and Technology, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250 (United States); Caballero, Isabel, E-mail: ssuchy@ucsd.edu [CEA Saclay, DSM/IRFU/SAp-UMR AIM (7158), CNRS/CEA, University Paris 7, Diderot, Gif sur Yvette (France)

2012-02-01T23:59:59.000Z

357

Broadband calibration for magnetic probes for use in the Maryland spheromak  

Science Journals Connector (OSTI)

Magnetic probes are commonly used in plasma experiments to measure the magnetic and plasma properties of the configuration. Probes consisting of coils of copper wire encased in one or more layers of stainless?steel tubing are used both inside and outside the plasma to measure the magnetic field in the Maryland spheromak. A technique has been developed to calibrate the probes over a large frequency bandwidth using digital computer signal processing. The frequency?dependent effects of the stainless?steel tubing and the self?inductance of the coils on the recorded signal are taken into account over the entire bandwidth. This technique may also be used to take into account the eddy currents present in the metal vessel walls.

R. S. Shaw; J. H. Booske; M. J. McCarrick

1987-01-01T23:59:59.000Z

358

Reducing magnetic field induced noise in broad-band seismic recordings  

Science Journals Connector (OSTI)

......horizontal components are significantly disturbed by tilts due to cars passing above, the vertical component's signal can easily...Streckeisen kindly provided a replacement coil to set the formerly defective STS-1V SN 1828 up for the experiment. Gabi Laske, Luis......

Thomas Forbriger

2007-04-01T23:59:59.000Z

359

Multilayer-weighted transmittance functions for use in broadband irradiance and turbidity calculations  

SciTech Connect

A physically-modelled method is presented to obtain an accurate transmittance and optical depth for various extinction processes (Rayleigh scattering, aerosol extinction, and absorption by ozone, nitrogen dioxide, uniformly mixed gases, and water vapor) affecting the transfer of shortwave radiation in a cloudless atmosphere. The integration over the shortwave solar spectrum is performed with a more realistic weighting function than the conventional one. The calculation and properties of the aerosol optical depth are discussed in detail, as well as its proper use in atmospheric turbidity studies.

Gueymard, C. [Florida Solar Energy Center, Cocoa, FL (United States)

1996-11-01T23:59:59.000Z

360

Advances in Broadband RF Sensing for Real-time Control of Plasma-Based Semiconductor Processing  

E-Print Network (OSTI)

to standard RF metrology. The system uses an antenna in the glow discharge to excite the bulk plasma identification of process conditions for standard RF sensing, and 99:5 correct identification of process

Grizzle, Jessy W.

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Broadband Energy Harvesting Using a Metamaterial Resonator Embedded With Non-Foster Impedance Circuitry  

E-Print Network (OSTI)

Radio Frequency Identification (RFID) and implantable biomedical devices need efficient power and data transfer with very low profile antennas. We propose a low profile electrically small antenna for near-field wireless power and data telemetry employing a metamaterial Split Ring Resonator (SRR) antenna. SRRs can be designed for operation over wide frequencies from RF to visible. However, they are inherently narrowband making them sensitive to component mismatch with respect to external transmit antenna. Here we propose an embedding of a non-foster impedance circuitry into the metamaterial SRR structure that imparts conjugate negative complex impedance to this resonator antenna thereby increasing the effective bandwidth and thus overcoming the fundamental limit for efficient signal coupling. We demonstrate the concept through extensive numerical simulations and a prototype system at the board level using discrete off-the-shelf components and printed circuit SRR antenna at 500 MHz. We show that the power trans...

Fu, Guoqing

2014-01-01T23:59:59.000Z

362

Incorporation of nanovoids into metallic gratings for broadband plasmonic organic solar cells  

Science Journals Connector (OSTI)

We present investigation and optimization of a newly proposed plasmonic organic solar cell geometry based on the incorporation of nanovoids into conventional rectangular backplane...

Lee, Sangjun; In, SungJun; Mason, Daniel R; Park, Namkyoo

2013-01-01T23:59:59.000Z

363

EXPOSURE ESTIMATES BASED ON BROADBAND ELF MAGNETIC FIELD MEASUREMENTS VERSUS THE ICNIRP MULTIPLE FREQUENCY RULE  

Science Journals Connector (OSTI)

......absorption of energy during exposure...extremely low-frequency (ELF) magnetic...data logging and storage and performs FFT...responding to a sum of frequencies by a sum of independent responses to each individual frequency(23). This......

Jess M. Paniagua; Montaa Rufo; Antonio Jimnez; Fernando T. Pachn; Julin Carrero

2014-05-01T23:59:59.000Z

364

2010 Asia-Pacific International Symposium on Aerospace Technology Rotor-stator interaction broadband noise  

E-Print Network (OSTI)

2010 Asia-Pacific International Symposium on Aerospace Technology Rotor-stator interaction-dimensional annular cascade to the impinging harmonic distortions. Each upstream har- monic mode is defined by its and Horan[2] . The #12;· 2 · Igor Vinogradov/ Chinese Journal of Aeronatics typical energy distribution over

Huang, Xun

365

Status of SuperSpec: A Broadband, On-Chip Millimeter-Wave Spectrometer  

E-Print Network (OSTI)

SuperSpec is a novel on-chip spectrometer we are developing for multi-object, moderate resolution (R = 100 - 500), large bandwidth (~1.65:1) submillimeter and millimeter survey spectroscopy of high-redshift galaxies. The spectrometer employs a filter bank architecture, and consists of a series of half-wave resonators formed by lithographically-patterned superconducting transmission lines. The signal power admitted by each resonator is detected by a lumped element titanium nitride (TiN) kinetic inductance detector (KID) operating at 100-200 MHz. We have tested a new prototype device that is more sensitive than previous devices, and easier to fabricate. We present a characterization of a representative R=282 channel at f = 236 GHz, including measurements of the spectrometer detection efficiency, the detector responsivity over a large range of optical loading, and the full system optical efficiency. We outline future improvements to the current system that we expect will enable construction of a photon-noise-lim...

Hailey-Dunsheath, S; Barry, P S; Bradford, C M; Chattopadhyay, G; Day, P; Doyle, S; Hollister, M; Kovacs, A; LeDuc, H G; Mauskopf, P; McKenney, C M; Monroe, R; O'Brient, R; Padin, S; Reck, T; Swenson, L; Tucker, C E; Zmuidzinas, J

2015-01-01T23:59:59.000Z

366

Silicon nanowire phototransistor : designing, fabricating and characterizing a high responsibility, broadband photodetector  

E-Print Network (OSTI)

of structure simulated in Silvaco. The device consists of acore-shell structures in Silvaco. Figure 5.2: Gain plots ofof structure simulated in Silvaco. The device consists of a

Zhang, Arthur Yasheng

2010-01-01T23:59:59.000Z

367

Single Antenna Target Detection Using Broadband Frequency Selection Time Reversal Method  

E-Print Network (OSTI)

transmitter to probe the environment. In the absence of target, the background channel response is given by Hw/o(f) in Figure 2(b). When target comes into this environment, channel response changes to Hw/(f). The difference as shown in Figure 2(c). The target response is time-reversed and re-broadcasted into the environment

Moura, José

368

Spectroscopic detection of hazardous substances using broadband-tunable Quantum Cascade Lasers  

Science Journals Connector (OSTI)

External-Cavity-Quantum Cascade Lasers are attractive sources for mid-infrared spectroscopy. We demonstrate the possibilities offered by EC-QCLs by two examples: Standoff detection of...

Hugger, Stefan; Fuchs, Frank; Jarvis, Jan; Yang, Quankui; Driad, Rachid; Bronner, Wolfgang; Aidam, Rolf; Ostendorf, Ralf; Wagner, Joachim

369

Broadband Distributed Feedback Quantum Cascade Laser Array Using a Heterogeneous Cascade  

Science Journals Connector (OSTI)

We demonstrated an array of distributed feedback quantum cascade lasers covering a spectral range of 220cm-1. The variability in threshold current and slope efficiency is explained in...

Diehl, Laurent; Lee, Benjamin G; Zhang, Haifei A; Pflgl, Christian; Belkin, Mikhail; Fisher, Milan; Wittman, Andreas; Faist, Jerome; Capasso, Federico

370

Broadband 100 GHz Substrate-Integrated Waveguide Couplers with Irregularly Shaped Via Holes for  

E-Print Network (OSTI)

, the compromise is often between accurate and expensive CNC or EDM machining of waveguide technology on one hand

Bornemann, Jens

371

Room temperature broadband coherent terahertz emission induced by dynamical photon drag in graphene  

E-Print Network (OSTI)

Nonlinear couplings between photons and electrons in new materials give rise to a wealth of interesting nonlinear phenomena. This includes frequency mixing, optical rectification or nonlinear current generation, which are of particular interest for generating radiation in spectral regions that are difficult to access, such as the terahertz gap. Owing to its specific linear dispersion and high electron mobility at room temperature, graphene is particularly attractive for realizing strong nonlinear effects. However, since graphene is a centrosymmetric material, second-order nonlinearities a priori cancel, which imposes to rely on less attractive third-order nonlinearities. It was nevertheless recently demonstrated that dc-second-order nonlinear currents as well as ultrafast ac-currents can be generated in graphene under optical excitation. The asymmetry is introduced by the excitation at oblique incidence, resulting in the transfer of photon momentum to the electron system, known as the photon drag effect. Here...

Maysonnave, J; Wang, F; Maero, S; Berger, C; de Heer, W; Norris, T B; De Vaulchier, L A; Dhillon, S; Tignon, J; Ferreira, R; Mangeney, J

2015-01-01T23:59:59.000Z

372

The broad-band fractal nature of heterogeneity in the upper crust from petrophysical logs  

Science Journals Connector (OSTI)

......1991. Deep borehole log evidence for...heterogeneity and large-scale velocity...Continental Deep-Drilling (KTB) Holes...results, for the borehole data, show broad-band...spectral scaling in borehole logs, Geophys...23, 31193122. large-scale velocity......

Sean S. Dolan; Christopher J. Bean; Bruno Riollet

1998-03-01T23:59:59.000Z

373

FR.OGAG.HHN T240 Observatoire de Grenoble broadband seismic network modernization and improvement  

E-Print Network (OSTI)

French Alps. : 33 RAP : 44 SismalpRLBP (SP & BB) : 15 GPSRENAG : 6 OMIV The Interreg/Alcotra RISE sites is based on : High performance 6 channels digitizers (Kephren_BB Agecodagis) Broad and barometric insulation for the BB (improvement at long period >10s) electrical and lightning protection

374

Broadband low?frequency sound radiator with high?frequency pump resonator.  

Science Journals Connector (OSTI)

A new type of underwater low?frequency radiator is described. Operation of the radiator is based on the nonlinear conversion of high?frequency acoustic pump energy to low?frequency sound pulsation of the water volume of the open acoustic pump resonator. High?intensity pump waves in the resonator produce cavitation. Water containing bubbles is highly nonlinear (hundreds and even thousands of times more than pure water) and dispersive. Both of these factors and also the use of the pump resonator promote much stronger conversion of pump energy to low?frequency sound in comparison with a parametric radiator. The calculation of the acoustical characteristics is presented.

Dimitri M. Donskoy

1992-01-01T23:59:59.000Z

375

LOCAL ACTORS BUILD BROADBAND INFRASTRUCTURE Ingjerd Skogseid, Western Norway Research Institute, Postboks 163, 6851 Sogndal, Norway,  

E-Print Network (OSTI)

of market liberalisation of the telecom sector, the Norwegian government chose a demand driven strategy- liberalisation in 1998 very few organisations had access to high-speed communication; the cost was too high

Hanseth, Ole

376

Integrated Ultra-Low-Loss 4-Bit Tunable Delay for Broadband Phased Array Antenna Applications  

E-Print Network (OSTI)

to state while the thermo-electric cooler (TEC) tries toisolation, a thermo-electric cooler was used to maintain the

2013-01-01T23:59:59.000Z

377

HeterogeneousComputing Unstructured Mesh Physics on the Cell Broadband Engine  

E-Print Network (OSTI)

. For optimal CBE performance, a problem must be divided into many small, independent chunks that can fit on core, such as GPU and many-core. . For example, in the FLAG rad-hydro code, most computation is done, a problem must be divided into many small, independent chunks that can fit into SPU local memory

378

Broad-band optical polarimetric studies towards the Galactic young star cluster Berkeley 59  

Science Journals Connector (OSTI)

......All-Sky Point Source Catalog, NASA/IPAC Infrared Science Archive ( http://irsa.ipac.caltech.edu/applications/Gator/ ). Davis L. Jr , Greenstein J. L., 1951, ApJ, 114, 206. Eswaraiah C. , Pandey A. K., Maheswar G., Medhi B......

C. Eswaraiah; A. K. Pandey; G. Maheswar; W. P. Chen; D. K. Ojha; H. C. Chandola

2012-01-21T23:59:59.000Z

379

Experimental verification of broadband invisibility using a cloak based on inductor-capacitor networks  

Science Journals Connector (OSTI)

We demonstrate the experimental realization of an invisibility cloak based on inductor-capacitor (L-C) transmission line (TL) networks. The anisotropic medium parameters of a cloak in the cylindrical basis are controlled independently by three branches of the L-C unit cell which leads to a full-parameter realization of the cloak. A cylindrical cloak working in very-high-frequency band has been designed and fabricated with its performance measured. The nonresonant property of the TL structure results in a relatively broad bandwidth (from 24 to 40 MHz) of the realized cloak which is clearly observed in our experiment.

Xiu Liu; Chao Li; Kan Yao; Xiankun Meng; Wei Feng; Bingheng Wu; Fang Li

2009-01-01T23:59:59.000Z

380

Estimation and tracking of rapidly time-varying broadband acoustic communication channels  

E-Print Network (OSTI)

This thesis develops methods for estimating wideband shallow-water acoustic communication channels. The very shallow water wideband channel has three distinct features: large dimension caused by extensive delay spread; ...

Li, Weichang, 1972-

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Broadband PIFA Rectenna Design for a Multi-Source Energy Harvesting Device.  

E-Print Network (OSTI)

??Combining different energy harvesting devices to optimize output power is crucial to the achievement of sustainable energy. This thesis focuses on the design, simulation and (more)

Erickson, Jillian

2014-01-01T23:59:59.000Z

382

Broadband coherent light generation in Raman-active crystals driven by femtosecond laser fields  

E-Print Network (OSTI)

be used to synthesize optical pulses as short as a fraction of a femtosecond (fs). Unlike generation using gases, there is no need for a cumbersome vacuum system when working with room temperature crystals. Our method, therefore, shows promise for a...

Zhi, Miaochan

2009-05-15T23:59:59.000Z

383

Viewstation applications: intelligent video processing over a broadband local area network  

Science Journals Connector (OSTI)

This paper describes applications built on the ViewStation, a distributed multimedia system based on Unix workstations and a gigabit per second local area network. A key tenet of the ViewStation project is the delivery of media data not just to the desktop ...

Christopher J. Lindblad; David J. Wetherall; William F. Stasior; Joel F. Adam; Henry H. Houh; Mike Ismert; David R. Bacher; Brent M. Phillips; David L. Tennenhouse

1994-08-01T23:59:59.000Z

384

A two-dimensional broadband vibration energy harvester using magnetoelectric transducer  

SciTech Connect

In this study, a magnetoelectric vibration energy harvester was demonstrated, which aims at addressing the limitations of the existing approaches in single dimensional operation with narrow working bandwidth. A circular cross-section cantilever rod, not a conventional thin cantilever beam, was adopted to extract vibration energy in arbitrary in-plane motion directions. The magnetic interaction not only resulted in a nonlinear motion of the rod with increased frequency bandwidth, but also contributed to a multi-mode motion to exhibit double power peaks. In energy harvesting with in-plane directions, it showed a maximum bandwidth of 4.4?Hz and power of 0.59?mW, with acceleration of 0.6?g (with g?=?9.8?m?s{sup ?2})

Yang, Jin, E-mail: yangjin@cqu.edu.cn; Wen, Yumei; Li, Ping; Yue, Xihai; Yu, Qiangmo; Bai, Xiaoling [Department of Optoelectronic Engineering, Research Center of Sensors and Instruments, Chongqing University, Chongqing 400044 (China)] [Department of Optoelectronic Engineering, Research Center of Sensors and Instruments, Chongqing University, Chongqing 400044 (China)

2013-12-09T23:59:59.000Z

385

E-Print Network 3.0 - average clear-sky broadband Sample Search...  

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

which used data from the 15-yr... the oceans and showed that the clear-sky greenhouse effect was an ... Source: Allan, Richard P. - Department of Meteorology, University of...

386

Tailoring broadband light trapping of GaAs and Si substrates by self-organised nanopatterning  

SciTech Connect

We report on the formation of high aspect ratio anisotropic nanopatterns on crystalline GaAs (100) and Si (100) substrates exploiting defocused Ion Beam Sputtering assisted by a sacrificial self-organised Au stencil mask. The tailored optical properties of the substrates are characterised in terms of total reflectivity and haze by means of integrating sphere measurements as a function of the morphological modification at increasing ion fluence. Refractive index grading from sub-wavelength surface features induces polarisation dependent anti-reflection behaviour in the visible-near infrared (VIS-NIR) range, while light scattering at off-specular angles from larger structures leads to very high values of the haze functions in reflection. The results, obtained for an important class of technologically relevant materials, are appealing in view of photovoltaic and photonic applications aiming at photon harvesting in ultrathin crystalline solar cells.

Martella, C.; Chiappe, D.; Mennucci, C.; Buatier de Mongeot, F. [Dipartimento di Fisica, Universit di Genova, via Dodecaneso 33, I-16146 Genova (Italy)

2014-05-21T23:59:59.000Z

387

Wireless Mesh Networks for Interconnection of Remote Sites to Fixed Broadband Networks  

E-Print Network (OSTI)

signal quality, bandwidth, and delay for a single long distance hop (Fig. 1(a)). Afterwards, relaying-ES) and our industry partners (SwissMeteo, SWITCH, and PCEngines). #12;(a) Preliminary, distance and relay will also be identified. We performed a preliminary latency test over 11.4 km. We investigate whether

Braun, Torsten

388

Direct and quantitative broadband absorptance micro/nano spectroscopy using FTIR and bilayer cantilever probes  

E-Print Network (OSTI)

Optical properties of micro/nano materials are important for many applications in biology, optoelectronics, and energy. In this thesis, a method is described to directly measure the quantitative absorptance spectra of ...

Hsu, Wei-Chun

2012-01-01T23:59:59.000Z

389

A biological sub-micron thickness optical broadband reflector characterized using both light and microwaves  

Science Journals Connector (OSTI)

...had been patterned with a reference two-dimensional micro-grid using scanning electron microscopy (SEM) (FEI Nova...coater (208 HR). Using substrates with the reference micro-grid described in 2.2, SEM images were taken of the same...

2009-01-01T23:59:59.000Z

390

Harvesting Broadband Kinetic Impact Energy from Mechanical Triggering/Vibration and Water Waves  

Science Journals Connector (OSTI)

(13) Although efforts in utilizing ocean wave energy could be dated back to 1890,(13) there has not been any commercial wave power farms up to now. ... This demonstrates that in addition to water wave energy harvesting our TENG also has the potential for hydrological analysis, which is a very important function for a wave energy farming system. ... Last but not least, the major component for ocean wave harvesting is the offshore wind power. ...

Xiaonan Wen; Weiqing Yang; Qingshen Jing; Zhong Lin Wang

2014-06-25T23:59:59.000Z

391

Assessment of Heliosat-4 surface solar irradiance derived on the basis of SEVIRI-APOLLO cloud products  

E-Print Network (OSTI)

surface downwelling solar irradiance (SSI). This method is composed by two parts: a clear-sky moduleAssessment of Heliosat-4 surface solar irradiance derived on the basis of SEVIRI-APOLLO cloud Aerospace Center (DLR), aims at estimating surface downwelling solar irradiance (SSI). It benefits from

Boyer, Edmond

392

Critical Mechanisms for the Formation of Extreme Arctic Sea-Ice Extent in the Summers of 2007 and 1996  

SciTech Connect

A warming Arctic climate is undergoing significant e 21 nvironmental change, most evidenced by the reduction of Arctic sea-ice extent during the summer. In this study, we examine two extreme anomalies of September sea-ice extent in 2007 and 1996, and investigate the impacts of cloud fraction (CF), atmospheric precipitable water vapor (PWV), downwelling longwave flux (DLF), surface air temperature (SAT), pressure and winds on the sea-ice variation in 2007 and 1996 using both satellite-derived sea-ice products and MERRA reanalysis. The area of the Laptev, East Siberian and West Chukchi seas (70-90oN, 90-180oE) has experienced the largest variation in sea-ice extent from year-to-year and defined here as the Area Of Focus (AOF). The record low September sea-ice extent in 2007 was associated with positive anomalies 30 of CF, PWV, DLF, and SAT over the AOF. Persistent anti-cyclone positioned over the Beaufort Sea coupled with low pressure over Eurasia induced easterly zonal and southerly meridional winds. In contrast, negative CF, PWV, DLF and SAT anomalies, as well as opposite wind patterns to those in 2007, characterized the 1996 high September sea-ice extent. Through this study, we hypothesize the following positive feedbacks of clouds, water vapor, radiation and atmospheric variables on the sea-ice retreat during the summer 2007. The record low sea-ice extent during the summer 2007 is initially triggered by the atmospheric circulation anomaly. The southerly winds across the Chukchi and East Siberian seas transport warm, moist air from the north Pacific, which is not only enhancing sea-ice melt across the AOF, but also increasing clouds. The positive cloud feedback results in higher SAT and more sea-ice melt. Therefore, 40 more water vapor could be evaporated from open seas and higher SAT to form more clouds, which will enhance positive cloud feedback. This enhanced positive cloud feedback will then further increase SAT and accelerate the sea-ice retreat during the summer 2007.

Dong, Xiquan; Zib, Benjamin J.; Xi, Baike; Stanfield, Ryan; Deng, Yi; Zhang, Xiangdong; Lin, B.; Long, Charles N.

2014-07-29T23:59:59.000Z

393

Assessing regional scale predictions of aerosols, marine stratocumulus, and their interactions during VOCALS-REx using WRF-Chem  

SciTech Connect

This study assesses the ability of the recent chemistry version (v3.3) of the Weather Research and Forecasting (WRF-Chem) model to simulate boundary layer structure, aerosols, stratocumulus clouds, and energy fluxes over the Southeast Pacific Ocean. Measurements from the VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) and satellite retrievals (i.e., products from the MODerate resolution Imaging Spectroradiometer (MODIS), Clouds and Earth's Radiant Energy System (CERES), and GOES-10) are used for this assessment. The Morrison double-moment microphysics scheme is newly coupled with interactive aerosols in the model. The 31-day (15 October-16 November 2008) WRF-Chem simulation with aerosol-cloud interactions (AERO hereafter) is also compared to a simulation (MET hereafter) with fixed cloud droplet number concentrations in the microphysics scheme and simplified cloud and aerosol treatments in the radiation scheme. The well-simulated aerosol quantities (aerosol number, mass composition and optical properties), and the inclusion of full aerosol-cloud couplings lead to significant improvements in many features of the simulated stratocumulus clouds: cloud optical properties and microphysical properties such as cloud top effective radius, cloud water path, and cloud optical thickness. In addition to accounting for the aerosol direct and semi-direct effects, these improvements feed back to the simulation of boundary-layer characteristics and energy budgets. Particularly, inclusion of interactive aerosols in AERO strengthens the temperature and humidity gradients within the capping inversion layer and lowers the marine boundary layer (MBL) depth by 130 m from that of the MET simulation. These differences are associated with weaker entrainment and stronger mean subsidence at the top of the MBL in AERO. Mean top-of-atmosphere outgoing shortwave fluxes, surface latent heat, and surface downwelling longwave fluxes are in better agreement with observations in AERO, compared to the MET simulation. Nevertheless, biases in some of the simulated meteorological quantities (e.g., MBL temperature and humidity) and aerosol quantities (e.g., underestimations of accumulation mode aerosol number) might affect simulated stratocumulus and energy fluxes over the Southeastern Pacific, and require further investigation. The well-simulated timing and outflow patterns of polluted and clean episodes demonstrate the model's ability to capture daily/synoptic scale variations of aerosol and cloud properties, and suggest that the model is suitable for studying atmospheric processes associated with pollution outflow over the ocean. The overall performance of the regional model in simulating mesoscale clouds and boundary layer properties is encouraging and suggests that reproducing gradients of aerosol and cloud droplet concentrations and coupling cloud-aerosol-radiation processes are important when simulating marine stratocumulus over the Southeast Pacific.

Yang Q.; Lee Y.; GustafsonJr., W. I.; Fast, J. D.; Wang, H.; Easter, R. C.; Morrison, H.; Chapman, E. G.; Spak, S. N.; Mena-Carrasco, M. A.

2011-12-02T23:59:59.000Z

394

Assessing regional scale predictions of aerosols, marine stratocumulus, and their interactions during VOCALS-REx using WRF-Chem  

SciTech Connect

In the recent chemistry version (v3.3) of the Weather Research and Forecasting (WRF-Chem) model, we have coupled the Morrison double-moment microphysics scheme with interactive aerosols so that full two-way aerosol-cloud interactions are included in simulations. We have used this new WRF-Chem functionality in a study focused on assessing predictions of aerosols, marine stratocumulus clouds, and their interactions over the Southeast Pacific using measurements from the VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) and satellite retrievals. This study also serves as a detailed analysis of our WRF-Chem simulations contributed to the VOCALS model Assessment (VOCA) project. The WRF-Chem 31-day (October 15-November 16, 2008) simulation with aerosol-cloud interactions (AERO hereafter) is also compared to a simulation (MET hereafter) with fixed cloud droplet number concentrations assumed by the default in Morrison microphysics scheme with no interactive aerosols. The well-predicted aerosol properties such as number, mass composition, and optical depth lead to significant improvements in many features of the predicted stratocumulus clouds: cloud optical properties and microphysical properties such as cloud top effective radius, cloud water path, and cloud optical thickness, and cloud macrostructure such as cloud depth and cloud base height. These improvements in addition to the aerosol direct and semi-direct effects, in turn, feed back to the prediction of boundary-layer characteristics and energy budgets. Particularly, inclusion of interactive aerosols in AERO strengths temperature and humidity gradients within capping inversion layer and lowers the MBL depth by 150 m from that of the MET simulation. Mean top-of-the-atmosphere outgoing shortwave fluxes, surface latent heat, and surface downwelling longwave fluxes are in better agreement with observations in AERO, compared to the MET simulation. Nevertheless, biases in some of the simulated meteorological quantities (e.g., MBL temperature and humidity over the remote ocean) and aerosol quantities (e.g., overestimations of supermicron sea salt mass) might affect simulated stratocumulus and energy fluxes over the SEP, and require further investigations. Although not perfect, the overall performance of the regional model in simulating mesoscale aerosol-cloud interactions is encouraging and suggests that the inclusion of spatially varying aerosol characteristics is important when simulating marine stratocumulus over the southeastern Pacific.

Yang, Qing; Gustafson, William I.; Fast, Jerome D.; Wang, Hailong; Easter, Richard C.; Morrison, H.; Lee, Y.- N.; Chapman, Elaine G.; Spak, S. N.; Mena-Carrasco, M. A.

2011-12-02T23:59:59.000Z

395

E-Print Network 3.0 - aerial transmission lines Sample Search...  

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

Overhead Power-line Broadband Communications; Transmission Capacity and Electromagnetic Interference Summary: Medium Voltage Overhead Power-line Broadband Communications;...

396

Broad-band and Ha surface photometry of the central regions of nearby active galaxies I. Observations  

E-Print Network (OSTI)

Electro?nica, Tonantzintla, Puebla, Mexico Accepted 1999 September 2. Received 1999 July 12; in original is the requirement of substantial amounts of gas in the galaxy centre. This gas has to be transported from reservoirs of galaxies hosting emission-line nuclei, in the sense that galaxies with AGN- like nuclei tend to have Hubble

Aretxaga, Itziar

397

Finite?Fault Simulation of Broadband Strong Ground Motion from the 2010 Mw7.0 Haiti Earthquake  

Science Journals Connector (OSTI)

...Prentice et-al. (2010), based on satellite imagery, aerial photography, light detection and ranging, and field investigations...Seismol. Soc. Am. 89 , 1484-1504. Hashimoto, M. , Y. Fukushima, and Y. Fukahata (2010). Fan-delta uplift and mountain...

George P. Mavroeidis; Christopher M. Scotti

398

Broadband RF Front-End Design for Multi-Standard Receiver with High-Linearity and Low-Noise Techniques  

E-Print Network (OSTI)

. gm,CS and Vov,bias scaling at RCG = 200, RCS = 200/n, and ? = 43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 35 NF vs. AV,CS at ? = 43 and Vov,bias Vov,CG = 1. . . . . . . . . . . . . . . . . . 59 36 Balun...-LNA. . . . . . . . . . . . . . . . . . . . 64 39 Simulated S11 and S21. . . . . . . . . . . . . . . . . . . . . . . . . . . 65 40 Simulated power gain (S21) and voltage gain (AV ) of Balun-LNA core. 65 41 Simulated NF and NF of balun-LNA core versus frequency. . . . . . 66 42 Simulated IIP...

Kim, Ju Sung

2012-02-14T23:59:59.000Z

399

Broadband antireflection and absorption enhancement of ultrathin silicon solar microcells enabled with density-graded surface nanostructures  

SciTech Connect

Density-graded surface nanostructures are implemented on ultrathin silicon solar microcells by silver-nanoparticle-catalyzed wet chemical etching to enable near-zero surface reflection over a broad wavelength range of incident solar spectrum as well as non-zeroth order diffraction and light trapping for longer wavelength photons, thereby achieving augmented photon absorption for ultrathin silicon microcells in a simple, cost-effective manner. The increase of absorbed photon flux through the black silicon (b-Si) surface translates directly into the corresponding enhancement of photovoltaic performance, where 5.7-?m b-Si microcells with the rational design of device configuration exhibit improved energy conversion efficiency by 148% and 50% with and without a diffuse backside reflector, respectively, compared to devices from the bare silicon without b-Si implementation. Systematic studies on nanostructured morphology, optical and electrical properties of b-Si microcells, together with semi-empirical numerical modeling of photon absorption, provide key aspects of underlying materials science and physics.

Chan, Lesley; Kang, Dongseok; Lee, Sung-Min; Li, Weigu; Hunter, Hajirah [Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089 (United States); Yoon, Jongseung, E-mail: js.yoon@usc.edu [Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089 (United States); Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089 (United States)

2014-06-02T23:59:59.000Z

400

BROADBAND JET EMISSION IN YOUNG AND POWERFUL RADIO SOURCES: THE CASE OF THE COMPACT STEEP SPECTRUM QUASAR 3C 186  

SciTech Connect

We present the X-ray analysis of a deep ({approx}200 ks) Chandra observation of the compact steep spectrum radio-loud quasar 3C 186 (z = 1.06) and investigate the contribution of the unresolved radio jet to the total X-ray emission. The spectral analysis is not conclusive on the origin of the bulk of the X-ray emission. In order to examine the jet contribution to the X-ray flux, we model the quasar spectral energy distribution, adopting several scenarios for the jet emission. For the values of the main physical parameters favored by the observables, a dominant role of the jet emission in the X-ray band is ruled out when a single-zone (leptonic) scenario is adopted, even including the contribution of the external photon fields as seed photons for inverse Compton emission. We then consider a structured jet, with the blazar component that-although not directly visible in the X-ray band-provides an intense field of seed synchrotron photons Compton-scattered by electrons in a mildly relativistic knot. In this case, the whole X-ray emission can be accounted for if we assume a blazar luminosity within the range observed from flat spectrum radio quasars. The X-ray radiative efficiency of such a (structured) jet is intimately related to the presence of a complex velocity structure. The jet emission can provide a significant contribution in X-rays if it decelerates within the host galaxy on kiloparsec scales. We discuss the implications of this model in terms of jet dynamics and interaction with the ambient medium.

Migliori, Giulia; Siemiginowska, Aneta [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Celotti, Annalisa, E-mail: migliori@cfa.harvard.edu [SISSA, Via Bonomea 265, I-34136 Trieste (Italy)

2012-04-20T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

On the Usage of Spectral and Broadband Satellite Instrument Measurements to Differentiate Climate Models with Different Cloud Feedback Strengths  

Science Journals Connector (OSTI)

Top-of-atmosphere radiometric signals associated with different high- and low-cloudradiative feedbacks have been examined through the use of an observing system simulation experiment (OSSE). The OSSE simulates variations in the spectrally ...

Daniel R. Feldman; Daniel M. Coleman; William D. Collins

2013-09-01T23:59:59.000Z

402

Broadband Wireless Internet Access in Public Transportation1 Andreas Roos, University of Applied Sciences Leipzig, 04277 Leipzig, Germany  

E-Print Network (OSTI)

Sciences Leipzig, 04277 Leipzig, Germany Nico Bayer, University of Applied Sciences Friedberg, 61169 Friedberg, Germany Dmitry Sivchenko, University of Applied Sciences Friedberg, 61169 Friedberg, Germany Michael Flegl, University of Applied Sciences Leipzig, 04277 Leipzig, Germany Profn. Dr. Sabine Wieland

Rakocevic, Veselin

403

Crustal deformation in the south-central Andes backarc terranes as viewed from regional broad-band seismic waveform modelling  

Science Journals Connector (OSTI)

......Caucete earthquake of western Argentina, PhD thesis , Cornell University...November 23, 1977, Caucete, Argentina, earthquake sequence, J...1974. Seismic moment and energy of earthquakes and seismic...Ramos V.A., Mendoza, Argentina. 54 Kraemer P.E. , Escayola......

Patricia Alvarado; Susan Beck; George Zandt; Mario Araujo; Enrique Triep

2005-11-01T23:59:59.000Z

404

Broadband lightcurve characteristics of GRBs 980425 and 060218 and comparison with long-lag, wide-pulse GRBs  

E-Print Network (OSTI)

It has been recently argued that low-luminosity gamma-ray bursts (LL-GRBs) are likely a unique GRB population. Here, we present systematic analysis of the lightcurve characteristics from X-ray to gamma-ray energy bands for the two prototypical LL-GRBs 980425 and 060218. It is found that both the pulse width ($w$) and the ratio of the rising width to the decaying width ($r/d$) of theses two bursts are energy-dependent over a broad energy band. There exists a significant trend that the pulses tend to be narrower and more symmetry with respect to the higher energy bands for the two events. Both the X-rays and the gamma-rays follow the same $w - E$ and $r/d - E$ relations. These facts may indicate that the X-ray emission tracks the gamma-ray emission and both are likely to be originated from the same physical mechanism. Their light curves show significant spectral lags. We calculate the three types of lags with the pulse peaking time ($t_{peak}$), the pulse centroid time ($t_{cen}$), and the cross-correlation function (CCF). The derived $t_{peak}$ and $t_{cen}$ are a power-law function of energy. The lag calculated by CCF is strongly correlated with that derived from $t_{peak}$. But the lag derived from $t_{cen}$ is less correlated with that derived from $t_{peak}$ and CCF. The energy dependence of the lags is shallower at higher energy bands. These characteristics are well consistent with that observed in typical long-lag, wide-pulse GRBs, suggesting that GRBs 980425 and 060218 may share the similar radiation physics with them.

Fu-Wen Zhang

2008-06-07T23:59:59.000Z

405

Surface Microseismic Monitoring of Hydraulic Fracturing of a Shale?Gas Reservoir Using Short?Period and Broadband Seismic Sensors  

Science Journals Connector (OSTI)

...compressive stress direction, fracking-induced events would generally...are not directly induced by fracking, but instead most likely by...pressure perturbation from fracking, which also provide a conduit...by injection into subsurface aquifers triggers earthquake swarm in...

Xiangfang Zeng; Haijiang Zhang; Xin Zhang; Hua Wang; Yingsheng Zhang; Qiang Liu

406

Research Statement Prasun Sinha With over 60% of the world's population using cellphones, the need for ubiquitous and broadband wire-  

E-Print Network (OSTI)

and the time-varying nature of resources such as network capacity and battery capacity pose significant- vices. Due to low recharging rates and the dynamics of renewable energy such as solar

Xuan, Dong

407

Development and characterization of an observatory-class, broadband, non-fedback, leaf-spring interferometric seismometer  

E-Print Network (OSTI)

of the cylinders is 7. Foam insulation for the northwestfoam (General Plastics, P/N: FR-6710). The new insulation

Otero, Jos D.

2009-01-01T23:59:59.000Z

408

Broad-band calibration of marine seismic sources used by R/V Polarstern for academic research in polar regions  

Science Journals Connector (OSTI)

......at least a far-field signature, its...density), and its cumulative energy flux, calculated...Backcalculated (a) far-field signature, (b...energy spectrum and cumulative energy flux of the...construction sounds at an oil production island, J. acoust......

Monika Breitzke; Olaf Boebel; Saad El Naggar; Wilfried Jokat; Berthold Werner

2008-08-01T23:59:59.000Z

409

Broadband colored-crescent generation in a single {beta}-barium-borate crystal by intense femtosecond pulses  

SciTech Connect

A visible colored crescent with a bandwidth broader than 220 nm is observed experimentally by loosely focused femtosecond pulses in a bulk quadratic nonlinear crystal ({beta}-BBO crystal) at certain incident angles. Through the analysis based on a simple collinear phase-matching model, we suggest that the colored crescent might be the coexistence of spontaneous parametric down-conversions (SPDCs) in the infrared range and the corresponding efficient second-order harmonic generations (SHGs) that occur in a wide spectrum. We further provide a possible mechanism for the SHG process in which the phase-mismatching angles of the frequency doubling of SPDCs in {beta}-BBO crystal are assumed to be compensated by the strong diffraction effect during the self-focusing process of the generated intense SPDC signals.

Wang, L.; Fan, Y. X.; Zhu, H.; Yan, Z. D.; Zhu, S. N.; Wang, Z. L. [Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, 210093 Nanjing (China); Zeng, H. [State Key Laboratory of Precision Spectroscopy, East China Normal University, 200062 Shanghai (China); Wang, H.-T. [Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, 210093 Nanjing (China); School of Physics, Nankai University, 300071 Tianjin (China)

2011-12-15T23:59:59.000Z

410

Broadband and Monochromatic X-ray Irradiation of Platinum: Monte Carlo Simulations for Dose Enhancement Factors and Resonant Theranostics  

E-Print Network (OSTI)

Enhancement Factors and Resonant Theranostics S. Lim1 , M.Montenegro2 , A.K. Pradhan1, 3 , S.N. Nahar3 , E-Z) nanomaterials as radiosensitizing agents should be extremely efficient for therapy and diagnostics (theranostics-rays such as obtained from B2M conversion should be most effective for theranostics, provided they can be tuned

Nahar, Sultana Nurun

411

Interstitial BiO molecule as a broadband IR luminescence centre in bismuth-doped silica glass  

SciTech Connect

Experimental data on absorption and luminescence in optical fibres with a Bi : SiO{sub 2} glass core are compared to experimentally determined and calculated spectroscopic properties of the BiO molecule. The results suggest that the IR luminescence of Bi : SiO{sub 2} glass is due to interstitial BiO molecules. This assumption is supported by quantum-chemical simulation results for a BiO molecule in a ring interstice of the silica glass network.

Sokolov, V O; Plotnichenko, V G; Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)

2011-12-31T23:59:59.000Z

412

IEEE SIGNAL PROCESSING LETTERS, VOL. 19, NO. 12, DECEMBER 2012 793 A Method for Broadband Full-Duplex MIMO Radio  

E-Print Network (OSTI)

. A hardware based test of the TDTB method shows a 50 dB SIC over a bandwidth of 30 MHz. Index Terms-duplex radios include wireless base stations, wireless relays and personal-area wireless devices. A fundamental and the receive (Rx) antennas on the same radio unit. This can be done by increasing the distances between the Tx

Hua, Yingbo

413

Transparent high-data-rate optical transmission through broadband hitless bypass switches for chip-scale optical  

E-Print Network (OSTI)

of silicon photonics are its large bandwidth, low energy consumption, and small footprint components switches, with open eye-diagrams and error-free operation (BERs less than 10-12 ). Both through- and drop-ports was demonstrated [5], with switching from one input to various output ports. Here we demonstrate a hitless switch

Bergman, Keren

414

Annual International Symposium on Smart Structures and Materials, 2003 1 Analysis of hybrid PMN/Terfenol broadband transducers in  

E-Print Network (OSTI)

SPIE 10th Annual International Symposium on Smart Structures and Materials, 2003 1 Analysis, electroacoustic theory, and linearized constitutive relationships for each class of smart material for low transducers employ a single smart material element, usually a piezoelectric stack, but recent U.S. Navy

415

Delay of Light in an Optical Bottle Resonator with Nanoscale Radius Variation: Dispersionless, Broadband, and Low Loss  

Science Journals Connector (OSTI)

It is shown theoretically that an optical bottle resonator with a nanoscale radius variation can perform a multinanosecond long dispersionless delay of light in a nanometer-order bandwidth with minimal losses. Experimentally, a 3mm long resonator with a 2.8nm deep semiparabolic radius variation is fabricated from a 19???m radius silica fiber with a subangstrom precision. In excellent agreement with theory, the resonator exhibits the impedance-matched 2.58ns (3 bytes) delay of 100ps pulses with 0.44??dB/ns intrinsic loss. This is a miniature slow light delay line with the record large delay time, record small transmission loss, dispersion, and effective speed of light.

M. Sumetsky

2013-10-17T23:59:59.000Z

416

The Development of Instrumentation and Methods for Measurement of Air-Sea Interaction and Coastal Processes from Manned and Unmanned Aircraft /  

E-Print Network (OSTI)

NovAtel SPAN circuitry FLIR long-wave IR camera (A325)payload also includes a FLIR (Willsonville, Oregon) A325

Reineman, Benjamin D.

2013-01-01T23:59:59.000Z

417

On breaking waves and turbulence at the air-sea interface /  

E-Print Network (OSTI)

instrumentation was a pair of FLIR SC6000 Long-Wave in-instantaneous Stereo LWIR cameras FLIR SC6000 640x512 pixels

Sutherland, Peter Jesse

2013-01-01T23:59:59.000Z

418

Large Eddy Simulation of PBL Stratocumulus: Comparison of Multi...  

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

Large-Eddy Simulation of PBL Stratocumulus: Comparison of Multi-Dimensional and IPA Longwave Radiative Forcing D. B. Mechem and Y. L. Kogan Cooperative Institute for Mesoscale...

419

The physics of the warming of Lake Tanganyika by climate change  

Science Journals Connector (OSTI)

... increased the density stratification and stability of Lake Tanganyika, a deep rift valley lake. ... Lakes warm through increased incoming long-wave radiation.

420

E-Print Network 3.0 - airs-derived olr temperature Sample Search...  

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

temperature (SST), and outgoing longwave radiation (OLR) in the northeastern tropical Pacific Ocean during... temperature Figure 5 shows LMCA analysis applied to the relation...

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

ARM - AMF Data Plots  

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

Wind Profiler (915RWP) Surface Energy Flux Eddy Correlation Systems (ECOR) Infrared Thermometer (IRT), part of the GNDRAD datastream Longwave Spectral Radiation Atmospheric...

422

1  

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

between upwelling longwave hemispheric directly measured and derived from infrared thermometer is failing the MAX difference of 15 Wm 2 . Data Quality Analysis On a weekly...

423

Research Highlight  

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

A Downwelling Infrared Radiance Climatology for the ARM Southern Great A Downwelling Infrared Radiance Climatology for the ARM Southern Great Plains Site Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Gero, J., University of Wisconsin Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Turner DD and PJ Gero. 2011. "Downwelling infrared radiance temperature climatology for the Atmospheric Radiation Measurement Southern Great Plains site." Journal of Geophysical Research - Atmospheres, 116, D08212, doi:10.1029/2010JD015135. The distribution of downwelling 10-micron infrared radiance observed at the SGP site by the AERI from June 1996 to May 2010, separated into all-sky (all samples) and the three distinct sky classifications.

424

Methodology for Calculating Spectral Surface Albedo Using ARM MFSR and MFR  

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

Methodology for Calculating Spectral Surface Albedo Using ARM MFSR and MFR Methodology for Calculating Spectral Surface Albedo Using ARM MFSR and MFR Data Gaustad, Krista Pacific Northwest National Laboratory Long, Chuck Pacific Northwest National Laboratory Category: Radiation This poster will describe a methodology for identifying the best estimate downwelling and upwelling irradiance measurements for use in calculating a global and spectral albedo for the area located near the SGP ARM's central facility 10m tower. The best estimate MFRSR downwelling global measurement is identified through comparisons between mfrsrE13, mfrsrC1, sirsE13, and sirsC1 downwelling global measurements. The poster will examine whether the best estimate of the individual six downwelling spectral measurements that correspond to the mfr operating wavelengths can

425

Evolutionary ecology during the rise of dioxygen in the Earth's atmosphere  

Science Journals Connector (OSTI)

...in downwelling seawater to quantitatively...that sequesters material for geological...drive natural selection, and functional...concentration in seawater. Hydrothermal...vented sulphide to seawater. Most of this material precipitated...

2008-01-01T23:59:59.000Z

426

Upper Ocean Heat Variability and its Impact on H i I t it d St t D d l PHurricane Intensity and Structure: Decadal Progress  

E-Print Network (OSTI)

/intensity of Katrina with HRD WCR LC Katrina with HRD wind fields (Powell and Houston 1996). FC #12;IntroductionC (cold wake) and mixing within the strongly forced regime; and · Downwelling to 100 m several Rmax from

Kuligowski, Bob

427

Download  

Science Journals Connector (OSTI)

watt. 1. In this equation, C is a constant, H(X) is the downwelling incident spectral ir- radiance on the photodetector, and Y(X) is the response spectrum; that is,...

Orcas

428

ARM - Publications: Science Team Meeting Documents  

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

participate in the ARM Mixed-Phase Arctic Cloud Experiment in the Fall of 2004. From the UAV platform, the S-HIS measures the up and downwelling infrared radiance at high spectral...

429

SURFRADA National Surface Radiation Budget Network for Atmospheric Research  

Science Journals Connector (OSTI)

A surface radiation budget observing network (SURFRAD) has been established for the United States to support satellite retrieval validation, modeling, and climate, hydrology, and weather research. The primary measurements are the downwelling ...

John A. Augustine; John J. DeLuisi; Charles N. Long

2000-10-01T23:59:59.000Z

430

Download  

Science Journals Connector (OSTI)

where Eod(z) is the downwelling scalar ir- radiance at depth z. The subscript 0 on. Do indicates that it applies to the same il- lumination condition as the ocean...

2000-03-18T23:59:59.000Z

431

The Atacama Surface Solar Maximum  

Science Journals Connector (OSTI)

Solar radiation reaching the earth's surface is one of the major drivers of climate dynamics. By setting the surface energy balance, downwelling solar radiation indirectly heats the atmosphere and controls the hydrological cycle. Besides its critical ...

Roberto Rondanelli; Alejandra Molina; Mark Falvey

432

Three-Dimensional Structure of Tropical Cells in the Central Equatorial Pacific Ocean  

Science Journals Connector (OSTI)

The shallow tropical cells (TCs) in the central equatorial Pacific Ocean are characterized by strong equatorial upwelling, near-surface wind-driven poleward flow, downwelling near the cold tongue boundaries, and equatorward flow below the surface ...

Renellys C. Perez; William S. Kessler

2009-01-01T23:59:59.000Z

433

Interaction between the BrewerDobson Circulation and the Hadley Circulation  

Science Journals Connector (OSTI)

Interannual changes of the stratospheric circulation are studied in relation to coherent changes of the tropospheric circulation. Emerging over the winter pole is a clear signature of adiabatic warming and anomalous downwelling. Reflecting an ...

Murry L. Salby; Patrick F. Callaghan

2005-10-01T23:59:59.000Z

434

mather-98.pdf  

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

the integrated column water is less than 2 cm. LW WVC * 10.18 + 365.7 Figure 1 (bottom panel) demonstrates the correlation between downwelling surface solar radiation and water...

435

Groundwater and Terrestrial Water Storage,  

E-Print Network (OSTI)

area experienced hot winds and extreme fire hazards. ForestPDO downwelling-favorable winds. Extremes were consistentlyextremes. The Southern An- nular Mode (SAM), which affects the westerly wind

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

2011-01-01T23:59:59.000Z

436

Stephen E. Schwartz Brookhaven National Laboratory Upton NY 11973  

E-Print Network (OSTI)

@bnl.govhttp://www.ecd.bnl.gov/steve DEFINING AND QUANTIFYING FEEDBACKS IN EARTH'S CLIMATE SYSTEM American Geophysical Union, Fall Meeting, 2008 of shortwave and longwave feedbacks. #12;CLIMATE SENSITIVITY ESTIMATES THROUGH THE AGES Estimates of central power: Q J= 1 4 S JS is solar constant is planetary coalbedo Longwave emitted power: E T= s 4 = 0

Schwartz, Stephen E.

437

Application of Improved Radiation Modeling to General Circulation Models  

SciTech Connect

This research has accomplished its primary objectives of developing accurate and efficient radiation codes, validating them with measurements and higher resolution models, and providing these advancements to the global modeling community to enhance the treatment of cloud and radiative processes in weather and climate prediction models. A critical component of this research has been the development of the longwave and shortwave broadband radiative transfer code for general circulation model (GCM) applications, RRTMG, which is based on the single-column reference code, RRTM, also developed at AER. RRTMG is a rigorously tested radiation model that retains a considerable level of accuracy relative to higher resolution models and measurements despite the performance enhancements that have made it possible to apply this radiation code successfully to global dynamical models. This model includes the radiative effects of all significant atmospheric gases, and it treats the absorption and scattering from liquid and ice clouds and aerosols. RRTMG also includes a statistical technique for representing small-scale cloud variability, such as cloud fraction and the vertical overlap of clouds, which has been shown to improve cloud radiative forcing in global models. This development approach has provided a direct link from observations to the enhanced radiative transfer provided by RRTMG for application to GCMs. Recent comparison of existing climate model radiation codes with high resolution models has documented the improved radiative forcing capability provided by RRTMG, especially at the surface, relative to other GCM radiation models. Due to its high accuracy, its connection to observations, and its computational efficiency, RRTMG has been implemented operationally in many national and international dynamical models to provide validated radiative transfer for improving weather forecasts and enhancing the prediction of global climate change.

Michael J Iacono

2011-04-07T23:59:59.000Z

438

Takara_ARM2007  

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

The longwave effective cloud fraction derived from The longwave effective cloud fraction derived from measurements with a comparison to shortwave cloud amounts for single layer clouds Ezra E. Takara and Robert G. Ellingson Dept. of Meteorology, Florida State University, Tallahassee, FL 32306 Known clear Derived clear Known overcast Derived overcast Flux Time Introduction This poster describes a comparison of the longwave effective cloud fraction (N e ) to shortwave cloud amounts: the cosine weighted cloud fraction from the Total Sky Imager (TSI), the cloud fraction from the shortwave flux analysis (swfan), and the Whole Sky Imager (WSI). These daytime comparisons are for single low cloud layers in 2000 and 2001 at the ARM SGP Central Facility as described in Ma and Ellingson (2005). Longwave N e The average longwave surface over a large area can be

439

ARM - Publications: Science Team Meeting Documents  

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

Importance and Parameterization of Longwave Radiative Scattering by Mineral Importance and Parameterization of Longwave Radiative Scattering by Mineral Aerosols Gautier, C., Dufresne, J.-L., and Ricchiazzi, P.J., University of California Santa Barbara Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The effect of scattering is not always included in longwave models of radiative forcing due to mineral aerosols. In this presentation, we quantify and highlight the importance of scattering in the longwave domain for a wide range of conditions commonly encountered during dust events. We show that the neglect of scattering may lead to an underestimate of longwave aerosol forcing. This underestimate may reach 50% of the forcing at the top of atmosphere and 15% at the surface for aerosol effective radius greater than a few tenths of a micron. In contrast, the heating rate

440

Low-cost gigabit PCF transceivers using commercially available logic ICs for short-range optical networks  

Science Journals Connector (OSTI)

We propose low-cost gigabit optical transceivers for broadband and short-range communication networks using plastic clad optical fiber. The transceivers can be used for broadband...

Fujimoto, Nobuhiro; Ishizuka, Atsuo; Moriya, Masayoshi; Goto, Masami

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

PowerPoint Presentation  

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

). * *Eppley Eppley and and Kipp Kipp & & Zonen Zonen broadband sensors on a broadband sensors on a Kipp Kipp & & Zonen Zonen solar tracker: down total, diffuse & direct SW...

442

USDA Rural Development Washington State Workshop  

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

The U.S. Department of Agriculture is hosting a Washington Rural Development Workshop. Speakers will cover local and regional broadband initiatives program and broadband success stories,...

443

Broadband Correlations Provide Evidence for Synchrotron Self-Compton X-rays from the Black Hole Binary GX 339-4  

SciTech Connect

GX 339-4 has been one of the key sources for unravelling the accretion ejection coupling in accreting stellar mass black holes. After a long period of quiescence between 1999 and 2002, GX 339-4 underwent a series of 4 outbursts that have been intensively observed by many ground based observatories (radio/infrared/optical) and satellites (X-rays). Here, we present some specific results of these broad band observational campaigns, focusing on the optical-infrared/X-ray flux correlations over the four outbursts. Thanks to our extensive data-set, we found a strong OIR/X-ray correlation over four decades with the presence of a break in the correlation index. These results seem to favour a synchrotron self-Compton origin for the X-ray emission in GX 339-4 during the hard state and could also provide an indirect detection of the break frequency in the synchrotron spectrum of the compact jets.

Coriat, M.; Corbel, S. [Universite Paris Diderot and Service d'Astrophysique, UMR AIM, CEA Saclay, F-91191 Gif-sur-Yvette (France); Buxton, M. M.; Baylin, C. D. [Astronomy Department, Yale University P.O. Box 208101, New Haven, CT 06520-8101 (United States)

2009-05-11T23:59:59.000Z

444

A technology strategy analysis for the deployment of broadband connectivity for economic development in emerging economies : studying the case of Kenya using the CLIOS process  

E-Print Network (OSTI)

The role of Information Communication Technology (ICT) in economic development is increasingly moving to the core of national competitiveness strategies around the world thanks to its revolutionary power as a critical ...

Omwenga, Brian Gichana

2009-01-01T23:59:59.000Z

445

Er{sup 3+}-doped strontium lithium bismuth borate glasses for broadband 1.5 {mu}m emission - optical properties  

SciTech Connect

Strontium lithium bismuth borate glasses (SLBiB) doped with various concentrations of Er{sup 3+} were prepared using conventional melt quench technique and investigated their optical properties. The amorphous nature of the prepared glass samples was confirmed by X-ray diffraction and SEM analysis. Optical properties were studied by measuring the optical absorption and near infrared luminescence spectra at room temperature. Judd-Ofelt (J-O) theory has been applied for the f.f transitions of Er{sup 3+} ions to evaluate J-O intensity parameters, {Omega}{lambda} ({lambda} = 2, 4 and 6). Using the J-O intensity parameters, radiative properties such as transition probabilities (A{sub R}), branching ratios ({beta}) and radiative lifetimes ({tau}) are estimated for certain transitions. From the emission spectra, peak emission-cross sections ({sigma}{sub p}) and products of stimulated emission cross-section and full width at half maximum ({sigma}{sub p} Multiplication-Sign FWHM) were calculated for the observed emission transition, {sup 4}I{sub 13/2}{yields}{sup 4}I{sub 15/2}.

Rajesh, D.; Balakrishna, A.; Ratnakaram, Y. C. [Department of Physics, Sri Venkateswara University, Tirupati-517502 (India)

2013-02-05T23:59:59.000Z

446

The first broad-band persistent X-ray spectrum of the dipping low mass X-ray binary EXO 0748-676  

E-Print Network (OSTI)

We report on the results of a BeppoSAX observation of the dipping LMXRB EXO 0748-676 performed in 2000 November. This is the first simultaneous observation of this source over the 0.1-100 keV energy range. The persistent spectrum is complex and shows a soft excess, which requires the inclusion of an ionized absorber (with a sub-solar abundance of iron). A cutoff power-law is a good fit to the high energy part of the spectrum, with a photon index of 1.3 and a cutoff around 50 keV. The 0.1-100 keV luminosity is 8.2E36 erg/s.

L. Sidoli; A. N. Parmar; T. Oosterbroek

2004-04-02T23:59:59.000Z

447

Tunable Localized Surface Plasmon-Enabled Broadband Light-Harvesting Enhancement for High-Efficiency Panchromatic Dye-Sensitized Solar Cells  

E-Print Network (OSTI)

In photovoltaic devices, light harvesting (LH) and carrier collection have opposite relations with the thickness of the photoactive layer, which imposes a fundamental compromise for the power conversion efficiency (PCE). ...

Dang, Xiangnan

448

The effect of continuous, broad-band random noise, both alone and in combination with a food odor on the lemon shark, Negaprion brevirostris  

E-Print Network (OSTI)

parentheses) of that period in hours. 1878 (11) NFR FU SS8 (3) N NF FU 724 (12) NFs NF 490 (12) NF NF Fi C-1 FO C-2 RN8 FO 689 (30) NFg NF 2368 (28) NFq FU 2393 (12) N NF2 FU C-3 NF I RN NF, C-4 FIG. 6. Experiment ll2. Circular..." of the hourly response (see text). + = significance at n * = significance at o ; f = significance at a 400 1&IFOII CR QQN&FOHI ? C4~~RN ? I~C2? W 250 9 200 |50 Z 50 40 50 50 0 80 90 100 1 0 HOURS 37 exception (exp. 112, RN&FO). It should be noted...

Jones, Keith Anthony

2012-06-07T23:59:59.000Z

449

Abarbanel, H., Brown, R., & Kadtke, J., 1989. Prediction and System Iden tification in Chaotic Time Series with Broadband Fourier Spectra. Phys.  

E-Print Network (OSTI)

Preprint Series LSE­MPS­67, Dept. of Mathematics, London School of Economics, Houghton St., London WC2A 2AE experiments on identification of transmembrane domains. In Proceedings of the 25th Hawaii International

Schuurmans, Dale

450

Experimental investigation of bright spots in broadband, gated x-ray images of ignition-scale implosions on the National Ignition Facility  

SciTech Connect

Bright spots in the hot spot intensity profile of gated x-ray images of ignition-scale implosions at the National Ignition Facility [G. H. Miller et al., Opt. Eng. 443, (2004)] are observed. X-ray images of cryogenically layered deuterium-tritium (DT) and tritium-hydrogen-deuterium (THD) ice capsules, and gas filled plastic shell capsules (Symcap) were recorded along the hohlraum symmetry axis. Heterogeneous mixing of ablator material and fuel into the hot spot (i.e., hot-spot mix) by hydrodynamic instabilities causes the bright spots. Hot-spot mix increases the radiative cooling of the hot spot. Fourier analysis of the x-ray images is used to quantify the evolution of bright spots in both x- and k-space. Bright spot images were azimuthally binned to characterize bright spot location relative to known isolated defects on the capsule surface. A strong correlation is observed between bright spot location and the fill tube for both Symcap and cryogenically layered DT and THD ice targets, indicating the fill tube is a significant seed for the ablation front instability causing hot-spot mix. The fill tube is the predominant seed for Symcaps, while other capsule non-uniformities are dominant seeds for the cryogenically layered DT and THD ice targets. A comparison of the bright spot power observed for Si- and Ge-doped ablator targets shows heterogeneous mix in Symcap targets is mostly material from the doped ablator layer.

Barrios, M. A.; Suter, L. J.; Glenn, S.; Benedetti, L. R.; Bradley, D. K.; Collins, G. W.; Hammel, B. A.; Izumi, N.; Ma, T.; Scott, H.; Smalyuk, V. A. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)] [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Regan, S. P.; Epstein, R. [Laboratory for Laser Energetics, University of Rochester 250 East River Road, Rochester, New York 14623-199 (United States)] [Laboratory for Laser Energetics, University of Rochester 250 East River Road, Rochester, New York 14623-199 (United States); Kyrala, G. A. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2013-07-15T23:59:59.000Z

451

Distortion of ethyne on coordination to silver acetylide, C{sub 2}H{sub 2}???AgCCH, characterised by broadband rotational spectroscopy and ab initio calculations  

SciTech Connect

The rotational spectra of six isotopologues of a complex of ethyne and silver acetylide, C{sub 2}H{sub 2}???AgCCH, are measured by both chirped-pulse and Fabry-Perot cavity versions of Fourier-transform microwave spectroscopy. The complex is generated through laser ablation of a silver target in the presence of a gas sample containing 1% C{sub 2}H{sub 2}, 1% SF{sub 6}, and 98% Ar undergoing supersonic expansion. Rotational, A{sub 0}, B{sub 0}, C{sub 0}, and centrifugal distortion ?{sub J} and ?{sub JK} constants are determined for all isotopologues of C{sub 2}H{sub 2}???AgCCH studied. The geometry is planar, C{sub 2v} and T-shaped in which the C{sub 2}H{sub 2} sub-unit comprises the bar of the T and binds to the metal atom through its ? electrons. In the r{sub 0} geometry, the distance of the Ag atom from the centre of the triple bond in C{sub 2}H{sub 2} is 2.2104(10) . The r(HC?CH) parameter representing the bond distance separating the two carbon atoms and the angle, ?(CCH), each defined within the C{sub 2}H{sub 2} sub-unit, are determined to be 1.2200(24) and 186.0(5), respectively. This distortion of the linear geometry of C{sub 2}H{sub 2} involves the hydrogen atoms moving away from the silver atom within the complex. The results thus reveal that the geometry of C{sub 2}H{sub 2} changes measurably on coordination to AgCCH. A value of 59(4) N?m{sup ?1} is determined for the intermolecular force constant, k{sub ?}, confirming that the complex is significantly more strongly bound than hydrogen and halogen-bonded analogues. Ab initio calculations of the r{sub e} geometry at the CCSD(T)(F12{sup *})/ACVTZ level of theory are consistent with the experimental results. The spectra of the {sup 107}Ag{sup 13}C{sup 13}CH and {sup 109}Ag{sup 13}C{sup 13}CH isotopologues of free silver acetylide are also measured for the first time allowing the geometry of the AgCCH monomer to be examined in greater detail than previously.

Stephens, Susanna L.; Zaleski, Daniel P.; Walker, Nicholas R., E-mail: nick.walker@newcastle.ac.uk, E-mail: a.c.legon@bristol.ac.uk [School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU (United Kingdom); Mizukami, Wataru; Tew, David P.; Legon, Anthony C., E-mail: nick.walker@newcastle.ac.uk, E-mail: a.c.legon@bristol.ac.uk [School of Chemistry, University of Bristol, Bristol BS8 1TS (United Kingdom)

2014-03-28T23:59:59.000Z

452

Research Highlight  

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

Cloud-Radiation Effects on Sea Ice Loss Cloud-Radiation Effects on Sea Ice Loss Download a printable PDF Submitter: Stephens, G. L., Colorado State University Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Kay, JE, T L'Ecuyer, A Gettelman, G Stephens, and C O'Dell. "The contribution of cloud and radiation anomalies to the 2007 Arctic sea ice extent minimum." To appear in Geophysical Research Letters. Clouds and downwelling radiation 2007-2006 differences (June 15-Sept 15). a. Total cloud fraction differences based on radar and lidar data. b. Downwelling SW radiative flux difference. c. Downwelling LW radiative flux difference. The Western Arctic Ocean is outlined in brown. ARM ground-based radiation observations at Barrow, Alaska.

453

Nauru Island Effect Detection Data Set  

DOE Data Explorer (OSTI)

During Nauru99 it was noted that the island was producing small clouds that advected over the ARM site. The Nauru Island Effect Study was run for 1.5 years and the methodology developed to detect the occurrence. Nauru ACRF downwelling SW, wind direction, and air temperature data are used, along with downwelling SW data from Licor radiometers located on the southern end of the island near the airport landing strip. A statistical analysis and comparison of data from the two locations is used to detect the likely occurrence of an island influence on the Nauru ACRF site data

Long, Chuck

454

Category:Passive Sensors | Open Energy Information  

Open Energy Info (EERE)

The following 12 pages are in this category, out of 12 total. A Aerial Photography F FLIR G Geodetic Survey H Hyperspectral Imaging L Long-Wave Infrared M Macrophotography...

455

Background-subtraction using contour-based fusion of thermal and visible imagery  

E-Print Network (OSTI)

rights reserved. Keywords: Background-subtraction; Fusion; Thermal imagery; Infrared; FLIR; Contour of the electromagnetic spectrum, long-wave infrared (thermal) and visible light. Thermal (FLIR) and color video cameras

Davis, James W.

456

A Comparison of OLR and Circulation-Based Indices for Tracking the MJO  

Science Journals Connector (OSTI)

Two univariate indices of the MaddenJulian oscillation (MJO) based on outgoing longwave radiation (OLR) are developed to track the convective component of the MJO while taking into account the seasonal cycle. These are compared with the all-...

George N. Kiladis; Juliana Dias; Katherine H. Straub; Matthew C. Wheeler; Stefan N. Tulich; Kazuyoshi Kikuchi; Klaus M. Weickmann; Michael J. Ventrice

2014-05-01T23:59:59.000Z

457

The Effect of Diurnal Sea Surface Temperature Warming on Climatological AirSea Fluxes  

E-Print Network (OSTI)

Diurnal sea surface warming affects the fluxes of latent heat, sensible heat, and upwelling longwave radiation. Diurnal warming most typically reaches maximum values of 3C, although very localized events may reach 78C. ...

Clayson, Carol Anne

458

COSMIC GPS Radio Occultation Temperature Profiles in Clouds  

Science Journals Connector (OSTI)

Thermodynamic states in clouds are closely related to physical processes such as phase changes of water and longwave and shortwave radiation. Global Positioning System (GPS) radio occultation (RO) data are not affected by clouds and have high ...

L. Lin; X. Zou; R. Anthes; Y-H. Kuo

2010-04-01T23:59:59.000Z

459

A satellite view of the radiative impact of clouds on surface downward fluxes in the Tibetan Plateau  

Science Journals Connector (OSTI)

Using thirteen years of satellite observations for the Tibetan Plateau, we investigate and quantify the sensitivities (or partial derivatives) of daytime surface downward shortwave and longwave fluxes with respect to changes in cloud cover and ...

C. M. Naud; I. Rangwala; M. Xu; J. R. Miller

460

Net radiation balance for two forested slopes on opposite sides of a valley  

Science Journals Connector (OSTI)

...Measurements of the net radiation balance of two forested sites on the opposite slopes of a valley in south-western Germany, made over 3 ... -slope than on the NE-slope. For long-wave radiation only small diff...

T. Holst; J. Rost; H. Mayer

2005-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "longwave broadband downwelling" 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

Section 69  

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

few tenths of a degree cooler than the temperature a few millimeters below it because of heat loss by sensible and latent heat fluxes as well as outgoing longwave radiative fluxes...

462

MRF Technical Note # 49 Can desert dust explain the anomalous greenhouse  

E-Print Network (OSTI)

radiative energy balance between net incoming solar radiation and outgoing longwave radiation (OLR of northern Africa where the model emits too much OLR by up to 40 Wm-2 in the monthly mean. By cloud

Allan, Richard P.

463

Interpretation of the propagation of surface altimetric observations in terms of planetary waves and geostrophic turbulence  

E-Print Network (OSTI)

The interpretation of surface altimetric signals in terms of Rossby waves is revisited. Rather than make the long-wave approximation, the horizontal scale of the waves is adjusted to optimally fit the phase speed predicted ...

Tulloch, Ross

464

The MJO and Air-Sea Interaction in TOGA COARE and DYNAMO  

Science Journals Connector (OSTI)

DYNAMO and TOGA-COARE observations and reanalysis-based surface flux products are used to test theories of atmosphere-ocean interaction that explain the Madden-Julian Oscillation (MJO). Negative intraseasonal outgoing longwave radiation, ...

Simon P. de Szoeke; James B. Edson; June R. Marion; Christopher W. Fairall; Ludovic Bariteau

465

Research Highlight  

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

Intercomparison of Longwave Radiative Heating Algorithms Intercomparison of Longwave Radiative Heating Algorithms Submitter: Baer, F., University of Maryland Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Baer, F., N. Arsky, J. J. Charney, and R. G. Ellingson. 1996. "Intercomparison of Heating Rates Generated by Global Climate Model Longwave Radiation Codes." J. Geoph. Res., 101, D21, 26589-26603. 30 levels of longwave heating rates for all algorithms tested at the five locations for the high cloud Same as Figure 1 but with the clouds removed (clear sky assumption). Same as Figure 1 but a different view. Averaged heating rates and heating rates of averaged. Same as Figure 3 but with the clouds removed (clear sky assumption).

466

Study of the possible benefits of cloud products of EUMETSAT in solar energy  

E-Print Network (OSTI)

Study of the possible benefits of cloud products of EUMETSAT in solar energy Zhipeng Qu, Philippe plane (SSI) are more and more used by engineering companies in solar energy. Performances are judged-derived assessments of surface downwelling solar irradiance are more and more used by engineering companies in solar

Paris-Sud XI, Université de

467

On the Penetration of the 660 km Phase Change by Mantle Downflows  

E-Print Network (OSTI)

in an upward force which resists the passage of the downwelling through the phase change. Cold material piles up and spreads lat- erally on the phase-change boundary. Eventu- ally, enough cold materialOn the Penetration of the 660 km Phase Change by Mantle Downflows David Bercovici Department

468

Download  

Science Journals Connector (OSTI)

Apr 9, 1984 ... downwelling irradiance (solar + sky) at the sea surface. Since the ... MEXICO. 36. 25. 35e. 25ON. 340. CHARLOTTE l l 27 l. 330. c3Lu. @&s&o d l. FLOFI'D ...... radiant energy that is absorbed by a' phy- toplankton cell (Ley...

2000-02-16T23:59:59.000Z

469

Marine Conservation Resource overexploitation  

E-Print Network (OSTI)

Conservation Marine vs, terrestrial? ), Ocean habitat spatially labile · Upwelling# downwelling · Currents % Bluefin tunas# Southern Ocean · )!& million hooks in peak year )1*& · Wandering albatrosses declined Marine conservation laws: fisheries Open ocean fisheries: · 4Tragedy of the Commons5 % Individuals

470

SPIE International Conference, Denver CO, July 1999 1 Relevance Of The Modified Model For The Microwave Brightness Temperature To The  

E-Print Network (OSTI)

of low wind conditions. The radiosonde profiles are used to compute the upwelling and downwelling numerous advantages over ship and buoy data. Some of these advantages include the vast coverage of global seas, including locations where radiosonde or buoys cannot be afforded, relatively low power

Cruz-Pol, Sandra L.

471

Infrared Thermometer (IRT) Handbook  

SciTech Connect

The Infrared Thermometer (IRT) is a ground-based radiation pyrometer that provides measurements of the equivalent blackbody brightness temperature of the scene in its field of view. The downwelling version has a narrow field of view for measuring sky temperature and for detecting clouds. The upwelling version has a wide field of view for measuring the narrowband radiating temperature of the ground surface.

VR Morris

2006-10-30T23:59:59.000Z

472

Impact of surface inhomogeneity on solar radiative transfer under overcast conditions  

E-Print Network (OSTI)

Impact of surface inhomogeneity on solar radiative transfer under overcast conditions Zhanqing Li1. Trishchenko Canada Centre for Remote Sensing, Ottawa, Ontario, Canada Received 20 June 2001; revised 26 to a method of estimating surface spectral areal-mean albedo from downwelling solar transmittance measurements

Li, Zhanqing

473

Research Highlight  

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Downward Longwave Irradiance Uncertainty Under Arctic Atmospheres: Downward Longwave Irradiance Uncertainty Under Arctic Atmospheres: Measurements and Modeling Submitter: Marty, C., Swiss Federal Institute of Snow and Avalanche Research Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Marty, C., R. Philipona, J. Delamere, E.G. Dutton, J. Michalsky, K. Stamnes, R. Storvold, T. Stoffel, S.A. Clough, and E.J. Mlawr, Downward longwave irradiance uncertainty under arctic atmospheres: Measurements and modeling, J. Geophys. Res., 108(D12), 4358, doi:10.1029/2002JD002937, 2003. IPASRC-II instruments deployed at ARM's Barrow Station. Members of 11 international institutions converged at the Atmospheric Radiation Measurement (ARM) Program's North Slope of Alaska (NSA) site in Barrow, Alaska, to conduct the Second International Pyrgeometer and

474

baer-98.pdf  

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Regional (Subgrid) Scale Variability and Sensitivity Regional (Subgrid) Scale Variability and Sensitivity of Longwave Radiative Heating (a) F. Baer, J. Zhao, and R. G. Ellingson Department of Meteorology University of Maryland, College Park College Park, Maryland Introduction Following on the work of Ellingson et al. (1991), we noted (Baer et al. 1996) a strong impact on the thermal field in the global scales of climate prediction due to longwave radiation. This observation was based on sensitivity studies with longwave radiation column models (LWRM) currently used in atmospheric global climate models (AGCMs). Because these effects may also occur at the regional scale, we have investigated this over the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site, which corresponds

475

Research Highlight  

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Improving Water Vapor Continuum Absorption and Its Impact on a GCM Improving Water Vapor Continuum Absorption and Its Impact on a GCM Simulation Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Mlawer, E. J., Atmospheric & Environmental Research, Inc. Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Turner DD, A Merrelli, D Vimont, and EJ Mlawer. 2012. "Impact of modifying the longwave water vapor continuum absorption model on community Earth system model simulations." Journal of Geophysical Research, 117, D04106, doi:10.1029/2011JD016440. The mean difference profiles (experiment minus control) for clear-sky longwave radiative heating (QRLC); shortwave clear-sky radiative heating (QRSC); the longwave cloud radiative forcing (QRLCF); the precipitation

476

Welcome to the Efficient Windows Collaborative  

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Low-E Coatings Low-E Coatings Low-E Center-of-glass values of double pane units with and without low-E coatings. When heat or light energy is absorbed by glass, it is either convected away by moving air or reradiated by the glass surface. The ability of a material to radiate energy is called its emissivity. All materials, including windows, emit (or radiate) heat in the form of long-wave, far-infrared energy depending on their temperature. This emission of radiant heat is one of the important components of heat transfer for a window. Thus reducing the window's emittance can greatly improve its insulating properties. Standard clear glass has an emittance of 0.84 over the long-wave portion of the spectrum, meaning that it emits 84% of the energy possible for an object at its temperature. It also means that 84% of the long-wave

477

ARM - Datastreams - avhrr12  

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2 2 Documentation XDC documentation Data Quality Plots 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 Datastream : AVHRR12 AVHRR: albedo and brightness temp., NOAA-12 Satellite Active Dates 1994.07.22 - 2007.08.09 Measurement Categories Radiometric Originating Instrument Advanced Very High Resolution Radiometer (AVHRR) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Shortwave narrowband radiance avhrr_ch1 Shortwave narrowband radiance avhrr_ch2 Longwave narrowband radiance avhrr_ch3 Longwave narrowband radiance avhrr_ch4 Longwave narrowband radiance avhrr_ch5 Locations North Slope Alaska NSA X1 Browse Data External Data (satellites and others)

478

ARM - Datastreams - avhrr10  

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Documentation XDC documentation Data Quality Plots 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 Datastream : AVHRR10 AVHRR: albedo and brightness temp., NOAA-10 Satellite Active Dates 1994.09.15 - 1999.10.09 Measurement Categories Radiometric Originating Instrument Advanced Very High Resolution Radiometer (AVHRR) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Shortwave narrowband radiance avhrr_ch1 Shortwave narrowband radiance avhrr_ch2 Longwave narrowband radiance avhrr_ch3 Longwave narrowband radiance avhrr_ch4 Longwave narrowband radiance avhrr_ch5 Locations North Slope Alaska NSA X1 Browse Data External Data (satellites and others)

479

Research Highlight  

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

Performance of Longwave Radiative Transfer Models for 3D Cloud Fields Performance of Longwave Radiative Transfer Models for 3D Cloud Fields Download a printable PDF Submitter: Kablick III, G. P., University of Maryland Ellingson, R. G., Florida State University Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Kablick III GP, RG Ellingson, EE Takara, and J Gu. 2011. "Longwave 3D benchmarks for inhomogeneous clouds and comparisons with approximate methods." Journal of Climate, 24, doi:10.1175/2010JCLI3752.1. The respective flux and heating rate errors (model-3DMC) for (a),(b) ATEX and (c),(d) GATE A. The error profiles in (a) and (c) are to be interpreted as ICA, solid lines; MRO, dashed lines; RO, dotted lines. (b) and (d) also show the differences between MRO and RO. The horizontal lines are the

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Parameterization Framework for Boundary-Layer Parameterization Framework for Boundary-Layer Cumuli L.K. Berg Pacific Northwest National Laboratory Richland, Washington R.B. Stull Atmospheric Science Programme Department of Earth and Ocean Sciences The University of British Columbia Vancouver, British Columbia, Canada Introduction Clouds have an important influence on the earth's climate and can contribute to either a net warming or a net cooling of the atmosphere through their effects on the short and longwave energy budgets. On one hand, clouds tend to cool the atmosphere by reflecting sunlight away from the earth, thus reducing the amount of solar radiation that reaches the earth's surface. On the other hand, clouds emit less longwave radiation to space then the earth's surface, leading to a warming of the atmosphere. This longwave

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481

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Impact of an Improved Longwave Radiative Transfer Model Impact of an Improved Longwave Radiative Transfer Model on the NCAR Community Climate Model M. J. Iacono, E. J. Mlawer, and S. A. Clough Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts Introduction The effect of introducing a new longwave (LW) radiation parameterization, rapid radiative transfer model (RRTM), on the energy budget and thermodynamic properties of the National Center for Atmospheric Research (NCAR) Community Climate Model (CCM3) is described. RRTM is a rapid and accurate, correlated-k, radiative transfer model (Mlawer et al. 1997) developed for the Atmospheric Radiation Measurement (ARM) Program to address the ARM objective of improving radiation models in global climate models. Among the important features of RRTM are its connection to radiation

482

Section 71  

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9 9 ' 12 µm * 8 µm F 89 8 d 8 ' 6 ' i ' 1 F 89 i *8 PCLoS (2) ' (1 & N) exp (&b tan 2); b ' & 2$ ln (1 & N) B (Z i , Z j , 2) Z i Z j (Z i , Z j , 2). Session Papers 309 (1) (3) Window-Region Longwave Fluxes: Accounting for Cloud Scattering E.E. Takara and R.G. Ellingson Department of Meteorology University of Maryland College Park, Maryland Introduction The longwave radiative transfer models used in many general circulation models (GCMs) assume that broken cloud fields consist of flat black plates. This neglects individual cloud geometry and cloud optical properties (i.e., single scattering albedo). The error due to neglecting cloud geometry has been well documented (Ellingson 1982; Harshvardhan and Weinman 1982; Killen and Ellingson 1994). Recently, Takara and Ellingson (1996) showed that cloud longwave

483

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Results from the Longwave Effective Cloud Fraction Results from the Longwave Effective Cloud Fraction in the Cloudiness Intercomparison E.E. Takara and R.G. Ellingson Department of Meteorology Florida State University Tallahassee, Florida Introduction While it may seem to be a simple quantity, cloud amount is somewhat elusive. Different types of instruments placed next to each other can give different cloud amounts because they use different parts of the spectrum, have different fields of view, sampling rates, etc. Another consideration is that cloud amount depends on the physical scale under consideration. The cloud amount appropriate for comparison to a single pyrgeometer is not likely to be useful for a grid square with 100-km sides. In terms of N e , the average longwave surface flux F, over an area that is compared to individual clouds,

484

Microsoft PowerPoint - ARM_Stoffel.ppt  

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DOE/SC-ARM/P-05-011 DOE/SC-ARM/P-05-011 2 Outline * Why the need for longwave data restriction? - Important Considerations and the 12 Wm -2 longwave results problem * What ARM data are effected? - List of station-dates * Can the data be adjusted? - Using available 20-sec data samples * How is ARM addressing pyrgeometer calibration? - In Search of a Measurement Reference * References * Acronyms * Appendix - Fundamentals of pyrgeometer operation and calibration 3 Why a Data Access Restriction? The ARM Program's data quality control measures discovered an unexpected shift in the time series of longwave irradiance data following a change in pyrgeometer calibration procedures for field instruments deployed at all SIRS, SKYRAD, and GNDRAD installations beginning in August 2002 and completed in March 2004.

485

Microsoft PowerPoint - ARM_pyrgeometer.ppt  

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

ARM-05-111 ARM-05-111 2 Outline * Why the need for longwave data restriction? - Important Considerations and the 12 Wm -2 longwave results problem * What ARM data are effected? - List of station-dates * Can the data be adjusted? - Using available 20-sec data samples * How is ARM addressing pyrgeometer calibration? - In search of a measurement reference * References * Acronyms * Appendix - Fundamentals of pyrgeometer operation and calibration 3 Why a Data Access Restriction? The ARM Program's data quality control measures discovered an unexpected shift in the time series of longwave irradiance data. This followed a change in pyrgeometer calibration procedures for field instruments deployed at all SIRS, SKYRAD, and GNDRAD installations beginning in August 2002 and completed in March 2004.

486

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

Longwave Radiation in the Longwave Radiation in the ECMWF Forecast System J.-J. Morcrette European Centre for Medium-Range Weather Forecasts Shinfield Park, Reading Berkshire, United Kingdom Abstract The surface downward longwave radiation (LWR) was computed by the European Centre for Medium- Range Weather Forecasts (ECMWF) forecast system used for the 40-year reanalysis. The LWR is compared with surface radiation measurements for the April to May 1999 period, available as part of the Baseline Surface Radiation Network (BSRN), Surface Radiation Budget Network (SURFRAD), and Atmospheric Radiation Measurement (ARM) Programs. Comparisons on a one-hour basis are emphasized. This allows discrepancies to be more easily linked to differences between model description and observations of temperature, humidity, and clouds. It also allows the model and

487

ARM - Publications: Science Team Meeting Documents  

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Impact of an Improved Longwave Radiation Model, RRTM, on the Energy Budget Impact of an Improved Longwave Radiation Model, RRTM, on the Energy Budget and Thermodynamic Properties of the NCAR Climate Model, CCM3 Iacono, M.J., Mlawer, E.J., and Clough, S.A., Atmospheric and Environmental Research, Inc. Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The effect of introducing a new longwave radiation parameterization, Rapid Radiative Transfer Model (RRTM), on the energy budget and thermodynamic properties of Version 3 of the National Center for Atmospheric Research (NCAR) Community Climate Model (CCM3) will be presented. RRTM is a rapid and accurate k-distribution radiative transfer model that has been developed for the Atmospheric Radiation Measurement (ARM) Program. Among the important features of the RRTM are its connection to radiation

488

E-Print Network 3.0 - accreting x-ray binaries Sample Search...  

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Collection: Physics 27 Broad-band spectral properties of accreting X-ray binary pulsars Mauro Orlandini * Summary: Broad-band spectral properties of accreting X-ray binary pulsars...

489

Networking technology adoption : system dynamics modeling of fiber-to-the-home  

E-Print Network (OSTI)

A system dynamics model is developed and run to study the adoption of fiber-to-the-home as a residential broadband technology. Communities that currently do not have broadband in the United States are modeled. This case ...

Kelic, Andjelka, 1972-

2005-01-01T23:59:59.000Z

490

E-Print Network 3.0 - arquitectura bioclimatica para Sample Search...  

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Universitat - Departament d'Arquitectura de Computadors, Broadband Communications Research Group Collection: Computer Technologies and Information Sciences 11 Arquitecturas...

491

Bias-Dependent Tunable Response of Normal Incidence Long Wave Infrared Quantum Dot Detectors  

E-Print Network (OSTI)

(FLIR) applications, a broadband response is desirable. However, for multispectral imaging" sensors can be operated in the FLIR mode (possibl

Hayat, Majeed M.

492

ARM - Publications: Science Team Meeting Documents  

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Rotating Shadow Arm for Broadband Hemispheric Radiometers: Instrument Design and Concept Verification Using Atmospheric Radiation Measurement Southern Great Plains Radiometer...

493

The impact of economic and social environment on the diffusion of Information and Communications  

E-Print Network (OSTI)

, based on the status of penetration rate of corresponding countries. In addition, it is especially participating in the analysis. Through a non- parametric analysis between broadband penetration and socio of broadband penetration. Furthermore, a causal analysis between the economic status and the level of broadband

Kouroupetroglou, Georgios

494

Design of a differential radiometer for atmospheric radiative flux measurements  

SciTech Connect

The Hemispherical Optimized NEt Radiometer (HONER) is an instrument under development at the Los Alamos National Laboratory for deployment on an unmanned aerospace vehicle as part of the Atmospheric Radiation Measurements (ARM/UAV) program. HONER is a differential radiometer which will measure the difference between the total upwelling and downwelling fluxes and is intended to provide a means of measuring the atmospheric radiative flux divergence. Unlike existing instruments which measure the upwelling and downwelling fluxes separately, HONER will achieve an optical difference by chopping the two fluxes alternately onto a common pyroelectric detector. HONER will provide data resolved into two spectral bands; one covering the solar dominated region from less than 0.4 micrometer to approximately 4.5 micrometers and the other covering the region from approximately 4.5 micrometers to greater than 50 micrometers, dominated by thermal radiation. The means of separating the spectral regions guarantees seamless summation to calculate the total flux. The fields-of-view are near-hemispherical, upward and downward. The instrument can be converted, in flight, from the differential mode to absolute mode, measuring the upwelling and downwelling fluxes separately and simultaneously. The instrument also features continuous calibration from on-board sources. We will describe the design and operation of the sensor head and the on-board reference sources as well as the means of deployment.

LaDelfe, P.C.; Weber, P.G.; Rodriguez, C.W.

1994-11-01T23:59:59.000Z

495

A PHYSICALLY-BASED SCHEME FOR THE URBAN ENERGY BUDGET IN ATMOSPHERIC MODELS  

E-Print Network (OSTI)

with calm winds is satisfactory, considering both the longwave budget and the surface temperatures. Secondly, Terjung and O'Rourke (1980), or wind channeling), but because of computational cost, applications have been developed using the canyon geometry (Johnson et al., 1991; Mills, 1993; Arnfield et al., 1998

Ribes, Aurélien

496

Enhancement of cloud formation by droplet charging  

Science Journals Connector (OSTI)

...and downwards long-wave radiation. Wind speed and direction measurements are...using a Chubb Instruments JCI131 field mill, standardized to the PG at 1m above...horizontal (u) and vertical (w) wind speeds and temperature (T) measured...

2008-01-01T23:59:59.000Z

497

General Macro-and Microphysical Properties of Deep Convective Clouds as Observed by MODIS  

E-Print Network (OSTI)

(Ramanathan et al. 1989; Harrison et al. 1990; Hartmann et al. 1992) using satellite data have shown that net radiative forcing for DCC systems on large scale is close to zero with large negative shortwave (SW) forcing canceling out large positive longwave (LW) forcing. Kiehl (1994) used a simple calculation to explain

Li, Zhanqing

498

Chapter 15. BIOLOGICALPHYSICAL INTERACTIONS AND GLOBAL CLIMATE CHANGE  

E-Print Network (OSTI)

605 Chapter 15. BIOLOGICAL­PHYSICAL INTERACTIONS AND GLOBAL CLIMATE CHANGE: SOME LESSONS FROM EARTH, absorb- ing long-wave radiation emitted from the planet surface and warming Earth's surface temperature combined. The idea that burning a relatively small amount of coal, oil, and gas can affect such a large

Schrag, Daniel

499

Large-Eddy Simulation of a Residual Layer: Low-Level Jet, Convective Rolls, and KelvinHelmholtz Instability  

Science Journals Connector (OSTI)

Diurnal variations of an atmospheric boundary layer from 0900 LST on day 33 to 0600 LST on day 34 of the Wangara experiment are studied using a large-eddy simulation (LES) model that includes longwave radiation and baroclinicity. The present study ...

Mikio Nakanishi; Ryosuke Shibuya; Junshi Ito; Hiroshi Niino

2014-12-01T23:59:59.000Z

500

What are greenhouse gases? Many chemical compounds in the atmosphere act as  

E-Print Network (OSTI)

back into space. However, greenhouse gases will not let all the infrared light pass throughWhat are greenhouse gases? Many chemical compounds in the atmosphere act as greenhouse gases the land and oceans. The warmed Earth releases this heat in the form of infrared light (longwave radiation