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1

Geothermal Exploration in Eastern California Using Aster Thermal...  

Open Energy Info (EERE)

A particular application is the use of satellite thermal infrared (TIR) imagery from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument aboard...

2

Asters  

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

Asters Asters Nature Bulletin No. 431-A October 30, 1971 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation ASTERS One of the charms of our American autumn is the profusion of asters that decorate the landscape from late August until the killing frosts of October or November. Some kinds, last wildflowers of the dying year, are still blooming when even the goldenrods are gone. Some are white; a few are pinkish; others range in color from pale blue to purple. They are very hardy but people who gather armloads of asters are disappointed to find that they close up and lose their beauty almost as soon as picked. The asters belong to that largest of all plant families, the Composites, which includes such common flowers as goldenrods, daisies, sunflowers, thistles and dandelions. The name aster, from the Latin and Greek word meaning "star", was given them because the flower head has a showy ring of rays or florets -- similar to those of a daisy, sunflower and chicory -- around a yellow center that turns reddish or purplish brown with age. Almost all are perennials. Each tiny seed has a short tuft of fuzz by which it is carried away in the wind.

3

Tir (Aster) Geothermal Anomalies | Open Energy Information  

Open Energy Info (EERE)

Tir (Aster) Geothermal Anomalies Tir (Aster) Geothermal Anomalies Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Tir (Aster) Geothermal Anomalies Details Activities (1) Areas (1) Regions (0) Abstract: The focus of this research is the detection of shallow thermal anomalies for geothermal exploration and field management. The objective of this paper is to outline the steps involved in applying thermal infrared imagery (TIR) for this task. This process is part of an ongoing project at the Energy & Geoscience Institute (EGI), where we are developing a methodology to use daytime and nighttime thermal infrared imagery produced by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) to map shallow thermal anomalies. Kinetic temperature images

4

Combined SWIR and LWIR Mineral Mapping Using MASTER/ASTER | Open Energy  

Open Energy Info (EERE)

SWIR and LWIR Mineral Mapping Using MASTER/ASTER SWIR and LWIR Mineral Mapping Using MASTER/ASTER Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Combined SWIR and LWIR Mineral Mapping Using MASTER/ASTER Details Activities (1) Areas (1) Regions (0) Abstract: This research uses multispectral short-waveinfrared (SWIR) and long-wave-infrared (LWIR) remote sensing to map mineralogy associated with hot springs and epithermal mineral deposits. Selected sites around the world covering a range of active/inactive hot springs and deposit types are being studied using the ODIS/ASTER airborne simulator (MASTER) and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). MASTER and ASTER data analysis contribute to mineral mapping in the VNIR/SWIR, however, their main contribution is improved mapping of

5

Geothermal Exploration in Eastern California Using Aster Thermal Infrared  

Open Energy Info (EERE)

in Eastern California Using Aster Thermal Infrared in Eastern California Using Aster Thermal Infrared Data Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geothermal Exploration in Eastern California Using Aster Thermal Infrared Data Abstract Remote sensing is a cost-effective tool that can be used to cover large areas for the purpose of geothermal exploration. A particular application is the use of satellite thermal infrared (TIR) imagery from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument aboard an orbiting satellite. It can be used to search remotely for elevated surface temperatures, which may be associated with geothermal resources. The study region is in the central part of eastern California, with emphasis on the Coso geothermal field. Nighttime scenes are most

6

Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery  

Open Energy Info (EERE)

Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery as a Geothermal Exploration Tool Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery as a Geothermal Exploration Tool Abstract In the Great Basin of the western United States, geothermal fluids are sometimes associated with surface crusts of borate evaporite minerals. These borates can therefore potentially serve as a geothermal exploration tool if they can be efficiently identified and mapped in the field. We demonstrate the effectiveness of using a field-portable ASD Fieldspec® spectroradiometer, and satellite-based Advanced Spaceborne Thermal and Emitted Reflectance Radiometer (ASTER) imagery for mapping borate minerals

7

E-Print Network 3.0 - aster yellows group Sample Search Results  

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

From Space: The Advanced Spaceborne Thermal Emission Summary: Radiometer (ASTER) Urban Environmental Monitoring Program Michael S. Ramsey INTRODUCTION As the global... )...

8

Analysis Of Hot Springs And Associated Deposits In Yellowstone...  

Open Energy Info (EERE)

Associated Deposits In Yellowstone National Park Using Aster And Aviris Remote Sensing Abstract The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and...

9

Microwave Radiometer (MWR) Handbook  

SciTech Connect (OSTI)

The Microwave Radiometer (MWR) provides time-series measurements of column-integrated amounts of water vapor and liquid water. The instrument itself is essentially a sensitive microwave receiver. That is, it is tuned to measure the microwave emissions of the vapor and liquid water molecules in the atmosphere at specific frequencies.

Morris, VR

2006-08-01T23:59:59.000Z

10

Lighting Research Group: Facilities: Spectro-Radiometer  

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

Spectro-Radiometer Spectro-Radiometer Spectro-Radiometer spectro-radiometer Gonio-photometer | Integrating sphere | Power analyzer | Spectro-radiometer The spectro-radiometer is used to measure the light output of a light source at each wavelength. The part that looks like a video camera (to the far right in the picture) can look at each wavelength separately. The spectro-radiometer can also be used as a standard light meter and measure all visible wavelengths at once to obtain the total light output of a source. The console portion of the spectro-radiometer is used to display the meter readings and also to adjust measurement settings like the sensitivity. The computer is interfaced with the spectro-radiometer and is used to send commands to the machine and receive, store, and analyze the data.

11

Remote Detection Of Quaternary Borate Deposits With Aster Satellite Imagery  

Open Energy Info (EERE)

Of Quaternary Borate Deposits With Aster Satellite Imagery Of Quaternary Borate Deposits With Aster Satellite Imagery As A Geothermal Exploration Tool Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Remote Detection Of Quaternary Borate Deposits With Aster Satellite Imagery As A Geothermal Exploration Tool Details Activities (2) Areas (2) Regions (0) Abstract: Unavailable Author(s): C. Kratt, M. Coolbaugh, Wendy Calvin Published: GRC, 2006 Document Number: Unavailable DOI: Unavailable Multispectral Imaging At Rhodes Marsh Area (Kratt, Et Al., 2006) Multispectral Imaging At Teels Marsh Area (Kratt, Et Al., 2006) Rhodes Marsh Geothermal Area Teels Marsh Geothermal Area Retrieved from "http://en.openei.org/w/index.php?title=Remote_Detection_Of_Quaternary_Borate_Deposits_With_Aster_Satellite_Imagery_As_A_Geothermal_Exploration_Tool&oldid=389959

12

Spectroscopy with Multichannel Correlation Radiometers  

E-Print Network [OSTI]

Correlation radiometers make true differential measurements in power with high accuracy and small systematic errors. This receiver architecture has been used in radio astronomy for measurements of continuum radiation for over 50 years; this article examines spectroscopy over broad bandwidths using correlation techniques. After general discussions of correlation and the choice of hybrid phase, experimental results from tests with a simple laboratory multi-channel correlation radiometer are shown. Analysis of the effect of the input hybrid's phase shows that a 90 degree hybrid is likely to be the best general choice for radio astronomy, depending on its amplitude match and phase flatness with frequency. The laboratory results verify that the combination of the correlation architecture and an analog lag correlator is an excellent method for spectroscopy over very wide bandwidths.

A. I. Harris

2005-04-20T23:59:59.000Z

13

Microwave Radiometer-High Frequency (MWRHF) Handbook  

SciTech Connect (OSTI)

The 90/150-GHz Vapor Radiometer provides time-series measurements of brightness temperatures from two channels centered at 90 and 150 GHz. These two channels are sensitive to the presence of liquid water and precipitable water vapor.

Caddedu, MP

2011-03-17T23:59:59.000Z

14

E-Print Network 3.0 - aster volcano archive Sample Search Results  

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

and mapping with data from NASA's Earth Observing System Summary: -temporal, multi-spatial data fusion capabilities of ASTER for Soufriere Hills Volcano, Montserrat. False...

15

Novel Cyclotron-Based Radiometal Production  

SciTech Connect (OSTI)

Accomplishments: (1) Construction of prototype solution target for radiometal production; (2) Testing of prototype target for production of following isotopes: a. Zr-89. Investigation of Zr-89 production from Y-89 nitrate solution. i. Defined problems of gas evolution and salt precipitation. ii. Solved problem of precipitation by addition of nitric acid. iii. Solved gas evolution problem with addition of backpressure regulator and constant degassing of target during irradiations. iv. Investigated effects of Y-89 nitrate concentration and beam current. v. Published abstracts at SNM and ISRS meetings; (3) Design of 2nd generation radiometal solution target. a. Included reflux chamber and smaller target volume to conserve precious target materials. b. Included aluminum for prototype and tantalum for working model. c. Included greater varicosities for improved heat transfer; and, (4) Construction of 2nd generation radiometal solution target started.

DeGrado, Timothy R. [Mayo Clinic] [Mayo Clinic (United States)

2013-10-31T23:59:59.000Z

16

Ground-Based Microwave Radiometer Measurements  

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

Ground-Based Microwave Radiometer Measurements Ground-Based Microwave Radiometer Measurements and Radiosonde Comparisons During the WVIOP2000 Field Experiment D. Cimini University of L'Aquila L'Aquil, Italy E. R. Westwater Cooperative Institute for Research in the Environmental Sciences University of Colorado National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado Y. Han Science System Applications National Aeronautics Space Administration Goddard Space Flight Center Greenbelt, Maryland S. Keihm Jet Propulsion Laboratory California Institute of Technology Pasadena, California Introduction During September to October 2000, a water vapor intensive operational period (WVIOP) was conducted at the Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains (SGP) Cloud and

17

Crookes's radiometers: a train of thought manifest  

Science Journals Connector (OSTI)

...radiant molecular energy of solar masses may at last be found...considered viscosity of the residual gas, and one of the Royal Society...He then described a little turbine radiometer not blacked at all...the warmer side, while the gas creeps around the edges from...

2010-01-01T23:59:59.000Z

18

183-GHz Radiometer Handbook - November 2006  

SciTech Connect (OSTI)

The G-Band Vapor Radiometer (GVR) provides time-series measurements of brightness temperatures from four double sideband channels centered at ± 1, ± 3, ± 7, and ± 14 GHz around the 183.31-GHz water vapor line. Atmospheric emission in this spectral region is primarily due to water vapor, with some influence from liquid water. The 183.31 ± 14-GHz channel is particularly sensitive to the presence of liquid water. The sensitivity to water vapor of the 183.31-GHz line is approximately 30 times higher than at the frequencies of the two-channel microwave radiometer (MWR) for a precipitable water vapor (PWV) amount of less than 2.5 mm. Measurements from this nstrument are therefore especially useful during low-humidity conditions (PWV < 5 mm).

MP Cadeddu

2006-11-30T23:59:59.000Z

19

Electrically calibrated absolute radiometer suitable for measurement automation  

Science Journals Connector (OSTI)

New electrically calibrated absolute radiometers (ESRs) were developed having fast response and high responsivity; these ESRs are specially useful for measurement automation. They are...

Boivin, Louis-Philippe; McNeely, Francis T

1986-01-01T23:59:59.000Z

20

The Rudb?r Mw 7.3 earthquake of 1990 June 20; seismotectonics, coseismic and geomorphic displacements, and historic earthquakes of the western 'High-Alborz', Iran  

Science Journals Connector (OSTI)

......digital topography and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER...Lam P.S., Hassanzadeh J., 2006. Thermal Histories from the central Alborz Mountains...Kikuchi M., Kanamori H., 1990. On the Sudan, Iran, and Philippines earthquakes of......

Manuel Berberian; Richard Walker

2010-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Four absolute cavity radiometer (pyrheliometer) intercomparisons at New River, Arizona: radiometer standards  

SciTech Connect (OSTI)

Four detailed intercomparisons were made for a number of models of cavity-type self-calibrating radiometers (pyrheliometers). Each intercomparison consisted of simultaneous readings of pyrheliometers at 30-second intervals in runs of 10 minutes, with at least 15 runs per intercomparison. Twenty-seven instruments were in at least one intercomparison, and five were in all four. Summarized results and all raw data are provided from the intercomparisons.

Estey, R.S.; Seaman, C.H.

1981-07-01T23:59:59.000Z

22

Validation of Geolocation of Measurements of the Clouds and the Earth’s Radiant Energy System (CERES) Scanning Radiometers aboard Three Spacecraft  

Science Journals Connector (OSTI)

The Clouds and the Earth’s Radiant Energy System (CERES) instrument is a scanning radiometer for measuring Earth-emitted and -reflected solar radiation to understand Earth’s energy balance. One CERES instrument was placed into orbit aboard the ...

G. Louis Smith; Kory J. Priestley; Phillip C. Hess; Chris Currey; Peter Spence

2009-11-01T23:59:59.000Z

23

Correlation of globe thermometer response and a YSI radiometer response  

E-Print Network [OSTI]

CORRELATION OF GLOBE THERMOMETER RESPONSE AND A YSI RADIOMETER RESPONSE A Thesis by ROBERT HOWARD FRANKNECHT Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1979 Major Subjects Industrial Hygiene CORRELATION OF GLOBE THERMOMETER RESPONSE AND A YSI RADIOMETER RESPONSE A Thesis by ROBERT HOMARD FRANKNECHT Approved as to sty1e and content by: C'6~& . ~ Chairman of Committee ead...

Franknecht, Robert Howard

1979-01-01T23:59:59.000Z

24

Calibrations of filter radiometers for determination of atmospheric optical depth  

Science Journals Connector (OSTI)

Atmospheric optical depths are determined by relating ground-based measurements of direct solar radiation to the extraterrestrial value, I0, that a filter radiometer would read outside the atmosphere. Usually I0 is determined by the Langley extrapolation technique from a high-altitude site, where clear and highly stable atmospheric conditions may be found. Alternatively, I0 can be measured in situ from a stratospheric balloon experiment. We have employed both methods and found agreement to better than 1 %. Filter radiometers tend to change over time, especially when used operationally outdoors. Absolute calibrations in the laboratory are used to monitor the radiometric stability of filter radiometers at the Physikalisch-Meteorologisches Observatorium Davos (PMOD/WRC, Switzerland). A spectral calibration facility based on a calibrated trap detector from the Physikalisch-Technische Bundesanstalt (PTB, Germany) is used to relate the filter radiometer to an accurate and long-term traceable standard. An FEL-lamp-based standard, previously used for several years, was compared with the new trap standard via a filter radiometer at four wavelengths between 368 nm and 862 nm and revealed a systematic difference of the order of 5 %. The link between radiometric and I0 calibration is the value of the extraterrestrial solar spectrum at the filter radiometer wavelengths which can be determined from these two calibrations and compared with published values.

Ch Wehrli

2000-01-01T23:59:59.000Z

25

Microwave Radiometer – 3 Channel (MWR3C) Handbook  

SciTech Connect (OSTI)

The microwave radiometer 3-channel (MWR3C) provides time-series measurements of brightness temperatures from three channels centered at 23.834, 30, and 89 GHz. These three channels are sensitive to the presence of liquid water and precipitable water vapor.

Cadeddu, MP

2012-05-04T23:59:59.000Z

26

Evaluation of Radiometers Deployed at the National Renewable Energy Laboratory's Solar Radiation Research Laboratory  

SciTech Connect (OSTI)

This study analyzes the performance of various commercially available radiometers used for measuring global horizontal irradiances and direct normal irradiances. These include pyranometers, pyrheliometers, rotating shadowband radiometers, and a pyranometer with fixed internal shading and are all deployed at the National Renewable Energy Laboratory's Solar Radiation Research Laboratory. Data from 32 global horizontal irradiance and 19 direct normal irradiance radiometers are presented. The radiometers in this study were deployed for one year (from April 1, 2011, through March 31, 2012) and compared to measurements from radiometers with the lowest values of estimated measurement uncertainties for producing reference global horizontal irradiances and direct normal irradiances.

Habte, A.; Wilcox, S.; Stoffel, T.

2014-02-01T23:59:59.000Z

27

Getting DEM from ASTER (~30m resolution) + importing it into ArcMap + georeferencing an image on top (e.g. satellite image, geological map)  

E-Print Network [OSTI]

in the "Search Term" bar: type "ASTER GDEM" and the "ASTER Global Digital Elevation Model V002" will appear in the "Select Datasets" window at the bottom. Then, select the zone of interest in the "Spatial Search" window click once on the bar next to "Bounding Box" and a window will appear in which you can enter

28

Differential Microwave Radiometer and the Cosmic Microwave Background |  

Office of Science (SC) Website

Differential Differential Microwave Radiometer and the Cosmic Microwave Background Laboratory Policy and Evaluation (LPE) LPE Home Staff M&O Contracts SC Laboratory Appraisal Process Laboratory Planning Process Work for Others in the Office of Science Laboratory Directed Research and Development (LDRD) DOE's Philosophy on LDRD Frequently Asked Questions Success Stories Brochures Additional Information LDRD Program Contacts Technology Transfer DOE National Laboratories Contact Information Laboratory Policy and Evaluation U.S. Department of Energy SC-32/Forrestal Building 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5447 F: (202) 586-3119 Success Stories Differential Microwave Radiometer and the Cosmic Microwave Background Print Text Size: A A A RSS Feeds FeedbackShare Page

29

Quantitative Analysis of Spectral Impacts on Silicon Photodiode Radiometers  

SciTech Connect (OSTI)

Inexpensive broadband pyranometers with silicon photodiode detectors have a non-uniform spectral response over the spectral range of 300-1100 nm. The response region includes only about 70% to 75% of the total energy in the terrestrial solar spectral distribution from 300 nm to 4000 nm. The solar spectrum constantly changes with solar position and atmospheric conditions. Relative spectral distributions of diffuse hemispherical irradiance sky radiation and total global hemispherical irradiance are drastically different. This analysis convolves a typical photodiode response with SMARTS 2.9.5 spectral model spectra for different sites and atmospheric conditions. Differences in solar component spectra lead to differences on the order of 2% in global hemispherical and 5% or more in diffuse hemispherical irradiances from silicon radiometers. The result is that errors of more than 7% can occur in the computation of direct normal irradiance from global hemispherical irradiance and diffuse hemispherical irradiance using these radiometers.

Myers, D. R.

2011-01-01T23:59:59.000Z

30

Quantitative Analysis of Spectral Impacts on Silicon Photodiode Radiometers: Preprint  

SciTech Connect (OSTI)

Inexpensive broadband pyranometers with silicon photodiode detectors have a non-uniform spectral response over the spectral range of 300-1100 nm. The response region includes only about 70% to 75% of the total energy in the terrestrial solar spectral distribution from 300 nm to 4000 nm. The solar spectrum constantly changes with solar position and atmospheric conditions. Relative spectral distributions of diffuse hemispherical irradiance sky radiation and total global hemispherical irradiance are drastically different. This analysis convolves a typical photodiode response with SMARTS 2.9.5 spectral model spectra for different sites and atmospheric conditions. Differences in solar component spectra lead to differences on the order of 2% in global hemispherical and 5% or more in diffuse hemispherical irradiances from silicon radiometers. The result is that errors of more than 7% can occur in the computation of direct normal irradiance from global hemispherical irradiance and diffuse hemispherical irradiance using these radiometers.

Myers, D. R.

2011-04-01T23:59:59.000Z

31

Narrow Field of View Zenith Radiometer (NFOV) Handbook  

SciTech Connect (OSTI)

The two-channel narrow field-of-view radiometer (NFOV2) is a ground-based radiometer that looks straight up and measures radiance directly above the instrument at wavelengths of 673 and 870 nm. The field-of-view of the instrument is 1.2 degrees, and the sampling time resolution is one second. Measurements of the NFOV2 have been used to retrieve optical properties for overhead clouds that range from patchy to overcast. With a one-second sampling rate of the NFOV2, faster than almost any other ARM Climate Research Facility (ACRF) instrument, we are able, for the first time, to capture changes in cloud optical properties at the natural time scale of cloud evolution.

Chiu, C; Marshak, A; Hodges, G; Barnard, JC; Schmelzer, J

2008-11-01T23:59:59.000Z

32

G-Band Vapor Radiometer Profiler (GVRP) Handbook  

SciTech Connect (OSTI)

The G-Band Vapor Radiometer Profiler (GVRP) provides time-series measurements of brightness temperatures from 15 channels between 170 and 183.310 GHz. Atmospheric emission in this spectral region is primarily due to water vapor, with some influence from liquid water. Channels between 170.0 and 176.0 GHz are particularly sensitive to the presence of liquid water. The sensitivity to water vapor of the 183.31-GHz line is approximately 30 times higher than at the frequencies of the two-channel microwave radiometer (MWR) for a precipitable water vapor (PWV) amount of less than 2.5 mm. Measurements from the GVRP instrument are therefore especially useful during low-humidity conditions (PWV < 5 mm). In addition to integrated water vapor and liquid water, the GVRP can provide low-resolution vertical profiles of water vapor in very dry conditions.

Caddeau, MP

2010-06-23T23:59:59.000Z

33

Neutron Reflectivity  

Science Journals Connector (OSTI)

Neutron Reflectivity ... This article is part of the Neutron Reflectivity special issue. ... The articles in this special issue on neutron reflectivity cover a broad range of the applications of this technique and the related X-ray and neutron scattering experiments of SAXS, SANS, GISAXS, and GISANS. ...

Jeffrey Penfold

2009-03-31T23:59:59.000Z

34

Design of a differential radiometer for atmospheric radiative flux measurements  

SciTech Connect (OSTI)

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

35

Ten channel background alpha radiometer for nondestructive analysis of low activity samples  

SciTech Connect (OSTI)

The description of a ten-channel alpha-radiometer based on large-area semiconductor detectors is presented in this paper. The radiometer is intended for determination of soil pollution by alpha-active radionuclides using thick samples. The analysis of isotopes is also provided. The concentrations of Pu and Am isotopes in soil samples are determined.

Pugatch, V.M.; Pavlenko, Y.N.; Vasiliev, Y.O.; Nenakhov, A.N.; Tkatch, N.M.; Barabash, L.I.; Berdnichenko, S.V.; Litovchenko, P.G.; Rosenfeld, A.B.; Zinets, O.S. (Inst. for Nuclear Research, Kiev (USSR))

1992-10-01T23:59:59.000Z

36

Calibration of a Solar Absolute Cavity Radiometer with Traceability to the World Radiometric Reference  

SciTech Connect (OSTI)

This report describes the present method of establishing traceability of absolute cavity radiometers to the World Radiometric Reference (WRR) through the process employed in the International Pyrheliometer Comparisons (IPC). This method derives the WRR reduction factor for each of the participating cavity radiometers. An alternative method is proposed, described, and evaluated as a way to reduce the uncertainty in the comparison process. The two methods are compared using a sample of data from the recent IPC-VIII conducted from September 25th to October 13th, 1995 at the World Radiation Center in Davos, Switzerland. A description of absolute cavity radiometers is also included, using a PMO-6 as an example of active cavity radiometers, and a HF as an example of passive cavity radiometers.

Reda, I.

1996-01-01T23:59:59.000Z

37

Working Group Reports A Short-Wave Radiometer Array Across  

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

9 9 Working Group Reports A Short-Wave Radiometer Array Across the Tropical Pacific Ocean as a Component of the TOGA-TAO Buoy Array R. M. Reynolds Brookhaven National Laboratory Upton, New York Introduction The purpose of this document is to bring together pertinent information concerning the NOAA TOGA-TAO buoy array so that a decision can be made for the following questions: 1. Are the scientific gains from an array of short-wave radiation sensors in the equatorial Pacific Ocean sufficiently impelling that DOE/ARM should provide financial and material support to NOAA/PMEL to install and operate this array? 2. What scientists and/or scientific studies would directly benefit from such a data set? 3. What should that array look like? That is, what sub-set of buoys should be so implemented given the per-buoy

38

Characterization and calibration of 8-channel E-band heterodyne radiometer system for SST-1 tokamak  

SciTech Connect (OSTI)

An 8-channel E-band heterodyne radiometer system (74–86 GHz) is designed, characterized, and calibrated to measure the radial electron temperature profile by measuring Electron Cyclotron Emission spectrum at SST-1 Tokamak. The developed radiometer has a noise equivalent temperature of 1 eV and sensitivity of 5 × 10{sup 9} V/W. In order to precisely measure the absolute value of electron temperature, a calibration measurement of the radiometer system is performed using hot-cold Dicke switch method, which confirms the system linearity.

Siju, Varsha; Kumar, Dharmendra; Shukla, Praveena; Pathak, S. K. [Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428 (India)] [Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428 (India)

2014-05-15T23:59:59.000Z

39

LAKESHORE AVON BR ANT-EDEN ALD EN-LANC ASTER AU BURN W SH ELDON  

U.S. Energy Information Administration (EIA) Indexed Site

81 81 § ¨ ¦ 81 LAKESHORE AVON BR ANT-EDEN ALD EN-LANC ASTER AU BURN W SH ELDON CALEDONIA HURON C REEK LEIC EST ER COL DEN ASH FORD INDIAN FALLS LAWTONS SAR DINIA RPD-037 -2 GLENWOOD PU LASKI PAVILION CON CORD COL LINS N ELM A ORC HARD PARK-H AMBU RG DANLEY CORNERS ST ILLWAT ER CHAFF EE-ARCAD E FAYETT E-WATERLOO LAKEVIEW JAVA SEN EC A W ELLER Y AU RORA E ZOAR BU FFALO TIOGA SILVER LAKE AKR ON ROM E RAT HBON E ALM A BET HANY WYOMING ULYSSES BR ANCH W SAN DY CREEK COL LINS BLOOMFIELD E LEBANON STATE LINE ALLEN CHUR CHVILLE BATH ATT ICA ELLI COT VILLE ROU LETT E BR ADFORD BU FFALO CREEK PEN N YAN N BEECH HILL-INDEPENDENC E GERRY-CH ARLOTTE STAGECOACH CHIPMUN K HEBRON VIN CENT BALD WI NSVILLE AKELEY OLEAN COWLESVILLE AN NIN SMET HPORT BR ADLEY BR OOK BU STI FIVE MILE BLOOMFIELD W SEN EC A FALLS NILE STAGECOACH LEWIS R UN BR ADFORD CAMDEN VAN ETT EN ROAN OKE SH ARON RICHBU RG FULTON N FINN EGAN H ILL TONAWANDA

40

Measurement of Boundary-Layer Temperature Profiles by a Scanning 5-MM Radiometer During the 1999 Winter NSA/AAO Radiometer Exp  

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

Boundary-Layer Temperature Profiles by Boundary-Layer Temperature Profiles by a Scanning 5-MM Radiometer During the 1999 Winter NSA/AAO Radiometer Experiment and WVIOP 2000 V. Y. Leuski and E. R. Westwater Cooperative Institute for Research in the Environmental Sciences National Oceanic and Atmospheric Administration Environmental Technology Laboratory University of Colorado Boulder, Colorado Introduction A scanning 5-mm-wavelength radiometer was deployed during two Intensive Operational Periods (IOPs) at the Atmospheric Radiation Measurement (ARM) Program's Cloud and Radiation Testbed (CART) facilities. The first was conducted at the North Slope of Alaska (NSA) and Adjacent arctic Ocean (AAO) site near Barrow, Alaska, during March 1999. One goal was to evaluate the ability of an

Note: This page contains sample records for the topic "reflection radiometer aster" 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

MEASUREMENTS AND RETRIEVALS FROM A NEW 183-GHz WATER VAPOR RADIOMETER IN  

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

MEASUREMENTS AND RETRIEVALS FROM A NEW 183-GHz WATER VAPOR RADIOMETER IN MEASUREMENTS AND RETRIEVALS FROM A NEW 183-GHz WATER VAPOR RADIOMETER IN THE ARCTIC Cadeddu, Maria Argonne National Laboratory Category: Instruments A new G-band (183 GHz) vapor radiometer (GVR), developed and built by Prosensing Inc. (http://www.prosensing.com), was deployed in Barrow, Alaska, in April 2005. The radiometer was deployed as part of the ongoing Atmospheric Radiation Measurement (ARM) program's effort to improve water vapor retrievals in the cold, dry Arctic environment. The instrument measures brightness temperatures from four double sideband channels centered at 1, 3, 7, and 14 GHz from the 183.31-GHz water vapor line. Atmospheric emission in this spectral region is primarily due to water vapor, with some influence from liquid water. The GVR will remain in Barrow

42

Ocean Aerosols: The Marine Fast-Rotating Shadow-Band Radiometer Network  

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

Ocean Aerosols: The Marine Fast-Rotating Ocean Aerosols: The Marine Fast-Rotating Shadow-Band Radiometer Network M. A. Miller, R. M. Reynolds, and J. J. Bartholomew Brookhaven National Laboratory Upton, New York Introduction A network of ship-mounted marine fast-rotating shadow-band radiometers (FRSRs) and broadband radiometers have been deployed over the fast four years on several backbone ships, funded jointly by Atmospheric Radiation Measurement (ARM) and National Aeronautic and Space Administration's (NASA's) Sensor Intercomparison and Merger for Biological and Interdisciplinary Studies (SIMBIOS). These radiometers operate continuously and automatically during daylight hours. There fundamental measurements made by the FRSRs in the network are the direct-normal irradiance

43

Evaluating Solar Resource Data Obtained from Multiple Radiometers Deployed at the National Renewable Energy Laboratory: Preprint  

SciTech Connect (OSTI)

Solar radiation resource measurements from radiometers are used to predict and evaluate the performance of photovoltaic and concentrating solar power systems, validate satellite-based models for estimating solar resources, and advance research in solar forecasting and climate change. This study analyzes the performance of various commercially available radiometers used for measuring global horizontal irradiances (GHI) and direct normal irradiances (DNI). These include pyranometers, pyrheliometers, rotating shadowband irradiometers, and a pyranometer with a shading ring deployed at the National Renewable Energy Laboratory's Solar Radiation Research Laboratory (SRRL). The radiometers in this study were deployed for one year (from April 1, 2011, through March 31, 2012) and compared to measurements from radiometers with the lowest values of estimated measurement uncertainties for producing reference GHI and DNI.

Habte, A.; Sengupta, M.; Andreas, A.; Wilcox, S.; Stoffel, T.

2014-09-01T23:59:59.000Z

44

A 16-channel heterodyne electron cyclotron emission radiometer on J-TEXT  

SciTech Connect (OSTI)

To study equilibrium temporal dynamics and the mechanisms of magnetohydrodynamic instabilities, a 16-channel heterodyne electron cyclotron emission (ECE) radiometer has been developed to view the J-TEXT tokamak from the low field side. The ECE radiometer detects second-harmonic extraordinary mode in the frequency band of 94-125 GHz which corresponds to resonances from 1.8 T to 2.2 T. This ECE system consists of an ECE transmission line, a radio frequency unit, and two 8-channel intermediate frequency units. An in situ blackbody calibration source is applied for system calibration by comparison of hot and cold sources in order to provide an absolute temperature measurement.

Yang, Z. J.; Zhuang, G.; Xiao, J. S.; Wang, Z. J. [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Key Laboratory of Fusion and Advanced Electromagnetic Technology Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Phillips, P. E.; Huang, H.; Rowan, W. L. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)

2012-10-15T23:59:59.000Z

45

Simultaneous Retreival of Surface Wind Speed and Rain Rate using Radar and Radiometer Measurements  

E-Print Network [OSTI]

to simultaneously retrieve the vertical profile of precipitation and the near-surface wind speed. ResultsSimultaneous Retreival of Surface Wind Speed and Rain Rate using Radar and Radiometer Measurements simultaneously estimates the over ocean near-surface wind speed and rain rate profile using data from a 10.7 GHz

Ruf, Christopher

46

Measurements of atmospheric water vapor above Mauna Kea using an infrared radiometer  

E-Print Network [OSTI]

Measurements of atmospheric water vapor above Mauna Kea using an infrared radiometer David A in atmospheric water vapor that distort the phase coherence of incoming celestial signals. The signal received water vapor, this paper presents results obtained with a second generation IRMA operating at the James

Naylor, David A.

47

G-Band Vapor Radiometer Precipitable Water Vapor (GVRPWV) Value-Added Product  

SciTech Connect (OSTI)

The G-Band Vapor Radiometer Precipitable Water Vapor (GVRPWV) value-added product (VAP) computes precipitable water vapor using neural network techniques from data measured by the GVR. The GVR reports time-series measurements of brightness temperatures for four channels located at 183.3 ± 1, 3, 7, and 14 GHz.

Koontz, A; Cadeddu, M

2012-12-05T23:59:59.000Z

48

Outgassing, Temperature Gradients and the Radiometer Effect in LISA: A Torsion Pendulum Investigation  

E-Print Network [OSTI]

Thermal modeling of the LISA gravitational reference sensor (GRS) includes such effects as outgassing from the proof mass and its housing and the radiometer effect. Experimental data in conditions emulating the LISA GRS are required to confidently predict the GRS performance. Outgassing and the radiometer effect are similar in characteristics and are difficult to decouple experimentally. The design of our torsion balance allows us to investigate differential radiation pressure, the radiometer effect, and outgassing on closely separated conducting surfaces with high sensitivity. A thermally controlled split copper plate is brought near a freely hanging plate-torsion pendulum.We have varied the temperature on each half of the copper plate and have measured the resulting forces on the pendulum. We have determined that to first order the current GRS model for the radiometer effect, outgassing, and radiation pressure are mostly consistent with our torsion balance measurements and therefore these thermal effects do not appear to be a large hindrance to the LISA noise budget. However, there remain discrepancies between the predicted dependence of these effects on the temperature of our apparatus.

Scott E Pollack; Stephan Schlamminger; Jens H Gundlach

2007-02-08T23:59:59.000Z

49

Relations between albedos and emissivities from MODIS and ASTER data over North African Desert  

E-Print Network [OSTI]

of incident solar energy reflected by the land surface in all directions. They determine the surface radiation map over the arid areas of Algeria, Libya, and Tunisia in North Africa at 30 second (about 1 km) and 2 in climate model deserts such as the Sahara. However, solar short- wave diffuse albedos vary by a factor

Zhou, Liming

50

GVR (G-Band Vapor Radiometer) M.P. Cadeddu and J.C. Liljegren Argonne Natl. Laboratory  

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

MWR status MWR status M.P. Cadeddu New radiometers New radiometers ECO-00664 (MWR procurement) open Specifications have been written and submitted Draft of specifications sent to vendors last month A few changes were incorporated after vendors feedback. Final specification document will be sent next week. ECO-00664 (MWR procurement) open Specifications have been written and submitted Draft of specifications sent to vendors last month A few changes were incorporated after vendors feedback. Final specification document will be sent next week. PWV-LWP: 12 2-channel MWR Temperature-humidity profile: 2 profilers operating Low LWP-PWV: 2 183-GHz radiometers Low LWP: 2 90/150-GHz radiometers PWV-LWP: 12 2-channel MWR Temperature-humidity profile: 2 profilers

51

Using a cold radiometer to measure heat loads and survey heat leaks  

SciTech Connect (OSTI)

We have developed an inexpensive cold radiometer for use in thermal/vacuum chambers to measure heat loads, characterize emissivity and specularity of surfaces and to survey areas to evaluate stray heat loads. We report here the results of two such tests for the James Webb Space Telescope to measure heat loads and effective emissivities of 2 major pieces of optical ground support equipment that will be used in upcoming thermal vacuum testing of the Telescope.

DiPirro, M.; Tuttle, J.; Hait, T.; Shirron, P. [Cryogenics and Fluids Branch, NASA/Goddard Space Flight Center, Greenbelt MD 20771 (United States)

2014-01-29T23:59:59.000Z

52

Neutron reflecting supermirror structure  

DOE Patents [OSTI]

An improved neutron reflecting supermirror structure comprising a plurality of stacked sets of bilayers of neutron reflecting materials. The improved neutron reflecting supermirror structure is adapted to provide extremely good performance at high incidence angles, i.e. up to four time the critical angle of standard neutron mirror structures. The reflection of neutrons striking the supermirror structure at a high critical angle provides enhanced neutron throughput, and hence more efficient and economical use of neutron sources. 2 figs.

Wood, J.L.

1992-12-01T23:59:59.000Z

53

Neutron reflecting supermirror structure  

DOE Patents [OSTI]

An improved neutron reflecting supermirror structure comprising a plurality of stacked sets of bilayers of neutron reflecting materials. The improved neutron reflecting supermirror structure is adapted to provide extremely good performance at high incidence angles, i.e. up to four time the critical angle of standard neutron mirror structures. The reflection of neutrons striking the supermirror structure at a high critical angle provides enhanced neutron throughput, and hence more efficient and economical use of neutron sources.

Wood, James L. (Drayton Plains, MI)

1992-01-01T23:59:59.000Z

54

Acronyms  

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

Acronyms Acronyms ADEOS Advanced Earth Observing Satellite (Japan) AERONET Aerosol Robotic Network AirMISR Airborne MISR ARM Atmospheric Radiation Measurement Program ASTER Advanced Spaceborne Thermal Emission and Reflection radiometer ATBD Algorithm Theoretical Basis Document AVHRR Advanced Very High Resolution Radiometer AVIRIS Airborne Visible/Infrared Imaging Spectrometer BRDF Bidirectional Reflectance Distribution Function CART Clouds and Radiation Testbed CERES Clouds and the Earth's Radiant Energy System DAAC Distributed Active Archive Center EOS Earth Observing System EOSDIS EOS Data and Information System GCIP GEWEX Continental-Scale International Project GEWEX Global Energy and Water Cycle Experiment GLI Global Imager GOES Geostationary Operational Environmental Satellite

55

Partial Discharge Location using Unsynchronized Radiometer Network for Condition Monitoring in HV Substations - A Proposed Approach  

Science Journals Connector (OSTI)

A location estimation system for online Partial Discharge (PD) detection is proposed as a low-cost approach to real-time condition monitoring, asset management and operation optimization in future smart grid. Some early progress in the development of subsystems (specifically the antenna, radiometer device, PD emulator and PD generator) for a proof-of-principle prototype system is described. The proposed PD Wireless Sensor Network (WSN) uses a novel approach to PD location which obviates the need for synchronization between sensors thereby improving scalability.

J M R de Souza Neto (IEEE member); E C T de Macedo; J S da Rocha Neto (IEEE senior member); E G da Costa; S A Bhatti; I A Glover

2012-01-01T23:59:59.000Z

56

Macrocyclic polyaminocarboxylates for stable radiometal antibody conjugates for therapy, SPECT and PET imaging  

DOE Patents [OSTI]

A simple method for the synthesis of 1,4,7, 10-tetraazacyclododecane N,N{prime}N{double_prime},N{prime}{double_prime}-tetraacetic acid and 1,4,8,11-tetraazacyclotetradecane N,N{prime},N{double_prime},N{prime}{double_prime}-tetraacetic acid involves cyanomethylating 1,4,7,10-tetraazacyclododecane or 1,4,8,11-tetraazacyclotetradecane to form a tetranitrile and hydrolyzing the tetranitrile. These macrocyclic compounds are functionalized through one of the carboxylates and then conjugated to various biological molecules including monoclonal antibodies. The resulting conjugated molecules are labeled with radiometals for SPECT and PET imaging and for radiotherapy. 4 figs.

Mease, R.C.; Mausner, L.F.; Srivastava, S.C.

1997-06-17T23:59:59.000Z

57

Multi Spectral Pushbroom Imaging Radiometer (MPIR) for remote sensing cloud studies  

SciTech Connect (OSTI)

A Multi Spectral Pushbroom Imaging Radiometer (MPIR) has been developed as are relatively inexpensive ({approximately}$IM/copy), well-calibrated,imaging radiometer for aircraft studies of cloud properties. The instrument is designed to fly on an Unmanned Aerospace Vehicle (UAV) platform at altitudes from the surface up to 20 km. MPIR is being developed to support the Unmanned Aerospace Vehicle portion of the Department of Energy`s Atmospheric Radiation Measurements program (ARM/UAV). Radiation-cloud interactions are the dominant uncertainty in the current General Circulation Models used for atmospheric climate studies. Reduction of this uncertainty is a top scientific priority of the US Global Change Research Program and the ARM program. While the DOE`s ARM program measures a num-ber of parameters from the ground-based Clouds and Radiation Testbed sites, it was recognized from the outset that other key parameters are best measured by sustained airborne data taking. These measurements are critical in our understanding of global change issues as well as for improved atmospheric and near space weather forecasting applications.

Phipps, G.S.; Grotbeck, C.L.

1995-10-01T23:59:59.000Z

58

Neutron reflecting supermirror structure  

DOE Patents [OSTI]

An improved neutron reflecting supermirror structure comprising a plurality of stacked sets of bilayers of neutron reflecting materials. The improved neutron reflecting supermirror structure is adapted to provide extremely good performance at high incidence angles, i.e. up to four time the critical angle of standard neutron mirror structures. The reflection of neutrons striking the supermirror structure at a high critical angle provides enhanced neutron throughput, and hence more efficient and economical use of neutron sources. One layer of each set of bilayers consist of titanium, and the second layer of each set of bilayers consist of an alloy of nickel with carbon interstitially present in the nickel alloy.

Wood, James L. (Drayton Plains, MI)

1992-01-01T23:59:59.000Z

59

Principles of neutron reflection  

SciTech Connect (OSTI)

Neutron reflection is perhaps the most developed branch of slow neutrons optics, which in itself is a direct consequence of the undulatory nature of the neutron. After reviewing the basic types of interactions (nuclear and magnetic) between neutrons and matter, the formalism is introduced to calculate the reflectivity from a sample composed of stacked flat layers and, inversely, to calculate the stacking from reflectivity measurements. Finally, a brief survey of the applications of neutron reflection is given, both in technology and in fundamental research. 32 refs., 6 figs.

Felcher, G.P.

1988-08-01T23:59:59.000Z

60

Integration of Global Positioning System and Scanning Water Vapor Radiometers for Precipitable Water Vapor and Cloud Liquid Path Estimates  

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

Integration of Global Positioning System and Scanning Integration of Global Positioning System and Scanning Water Vapor Radiometers for Precipitable Water Vapor and Cloud Liquid Path Estimates V. Mattioli and P. Basili Department of Electronic and Information Engineering University of Perugia Perugia, Italy E. R. Westwater Cooperative Institute for Research in Environmental Sciences University of Colorado National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado Introduction In recent years the Global Positioning System (GPS) has proved to be a reliable instrument for measuring precipitable water vapor (PWV) (Bevis et al. 1992), offering an independent source of information on water vapor when compared with microwave radiometers (MWRs), and/or radiosonde

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Retrieval of Optical And Size Parameters of Aerosols Utilizing a Multi-Filter Rotating Shadowband Radiometer and Inter-Comparison with CIMEL Sun Photometer and  

E-Print Network [OSTI]

Radiometer and Inter-Comparison with CIMEL Sun Photometer and MICROTOPS Sun Photometer Antonio Aguirre Radiometer (MFRSR) and comparing with data from a CIMEL Sun Photometer and a MICROTOPS Sun Photometer. Using the inverse cosine of the angle between the sun and the vertical. A Langley plot provides a linear regression

62

Use of Satellite Remote Sensing in Monitoring Saltcedar Control along the Lower Pecos River, USA  

E-Print Network [OSTI]

. In 1999 through 2004, herbicides were sprayed from helicopters along some sections of the river to reduce saltcedar infestation. Here we describe a simple methodology based on satellite remote sensing for monitoring the impact of the saltcedar control... measures. Data from the Landsat 7 Enhanced Thematic Mapper Plus (ETM+) and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) obtained in 1999 through 2004 over a section of the Pecos near Mentone, Texas were used for the present...

Nagihara, Seiichi; Hart, Charles R.

2007-07-23T23:59:59.000Z

63

Reflectivity of nonideal plasmas  

Science Journals Connector (OSTI)

New results on optical reflectance measurements of shock-compressed dense xenon plasma at wavelengths ? = 532 nm and ? = 694 nm are reported. The investigations have been performed for nonideal plasma (? = 0.87–2.0) at densities ? = 0.27–3.84 g cm?3 and pressures P = 1.6–17 GPa. The obtained high optical reflectance values are characteristic of a metallic fluid and are evidence for a conducting state in the shocked xenon. Reflectance measurements at different wavelengths provide information about the density profile of the shock wave front.

Yu Zaporoghets; V Mintsev; V Gryaznov; V Fortov; H Reinholz; T Raitza; G Röpke

2006-01-01T23:59:59.000Z

64

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

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

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

65

Modification of the collective Thomson scattering radiometer in the search for parametric decay on TEXTOR  

SciTech Connect (OSTI)

Strong scattering of high-power millimeter waves at 140 GHz has been shown to take place in heating and current-drive experiments at TEXTOR when a tearing mode is present in the plasma. The scattering signal is at present supposed to be generated by the parametric decay instability. Here we describe the heterodyne detection system used to characterize the newly discovered signal measured at TEXTOR, and we present spectral shapes in which the signal can appear under different conditions. The radiation is collected by the receiver through a quasi-optical transmission line that is independent of the electron cyclotron resonance heating transmission line, and so the scattering geometry is variable. The signal is detected with 42 frequency channels ranging from 136 to 142 GHz. We demonstrate that the large signal does not originate from gyrotron spurious radiation. The measured signal agrees well with independent backscattering radiometer data.

Nielsen, S. K.; Salewski, M.; Korsholm, S. B.; Leipold, F.; Meo, F.; Michelsen, P.; Stejner, M. [Association EURATOM - DTU, Department of Physics, Technical University of Denmark, Risoe Campus, DK-4000 Roskilde (Denmark); Bongers, W.; Moseev, D.; Westerhof, E. [FOM Institute DIFFER, Dutch Institute for Fundamental Energy Research, Association EURATOM - FOM, Nieuwegein (Netherlands); Oosterbeek, J. W. [Department of Applied Physics, Science and Technology of Nuclear Fusion, Eindhoven University of Technology, NL-5600 MB Eindhoven (Netherlands)

2012-11-15T23:59:59.000Z

66

Informal Preliminary Report on Comparisons of Prototype SPN-1 Radiometer to PARSL Measurements  

SciTech Connect (OSTI)

The prototype SPN-1 has been taking measurements for several months collocated with our PNNL Atmospheric Remote Sensing Laboratory (PARSL) solar tracker mounted instruments at the Pacific Northwest National Laboratory (PNNL) located in Richland, Washington, USA. The PARSL radiometers used in the following comparisons consist of an Eppley Normal Incident Pyrheliometer (NIP) and a shaded Eppley model 8-48 “Black and White” pyrgeometer (B&W) to measure the direct and diffuse shortwave irradiance (SW), respectively. These instruments were calibrated in mid-September by comparison to an absolute cavity radiometer directly traceable to the world standard group in Davos, Switzerland. The NIP calibration was determined by direct comparison, while the B&W was calibrated using the shade/unshade technique. All PARSL data prior to mid-September have been reprocessed using the new calibration factors. The PARSL data are logged as 1-minute averages from 1-second samples. Data used in this report span the time period from June 22 through December 1, 2006. All data have been processed through the QCRad code (Long and Shi, 2006), which itself is a more elaborately developed methodology along the lines of that applied by the Baseline Surface Radiation Network (BSRN) Archive (Long and Dutton, 2004), for quality control. The SPN-1 data are the standard total and diffuse SW values obtained from the analog data port of the instrument. The comparisons use only times when both the PARSL and SPN-1 data passed all QC testing. The data were further processed and analyzed by application of the SW Flux Analysis methodology (Long and Ackerman, 2000; Long and Gaustad, 2004, Long et al., 2006) to detect periods of clear skies, calculate continuous estimates of clear-sky SW irradiance and the effect of clouds on the downwelling SW, and estimate fractional sky cover.

Long, Charles N.

2014-06-17T23:59:59.000Z

67

ASTER | Open Energy Information  

Open Energy Info (EERE)

Nationality United States Organization NASA Weblink http:asterweb.jpl.nasa.gov Sensor Data Number of Bands 14 Spatial Resolution PAN (m) 15 Spatial Resolution MULTI (m) 3090...

68

Analysis Of Hot Springs And Associated Deposits In Yellowstone National  

Open Energy Info (EERE)

Hot Springs And Associated Deposits In Yellowstone National Hot Springs And Associated Deposits In Yellowstone National Park Using Aster And Aviris Remote Sensing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Analysis Of Hot Springs And Associated Deposits In Yellowstone National Park Using Aster And Aviris Remote Sensing Details Activities (6) Areas (1) Regions (0) Abstract: The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and the Airborne Visible/IR Image Spectrometer (AVIRIS) data were used to characterize hot spring deposits in the Lower, Midway, and Upper Geyser Basins of Yellowstone National Park from the visible/near infrared (VNIR) to thermal infrared (TIR) wavelengths. Field observations of these basins provided the critical ground-truth for comparison with the

69

Introducing Fraunhofer Personal reflection  

E-Print Network [OSTI]

­ they are not part of the University. The Centres form an integral part of that country's innovation system while for Sustainable Energy Systems. The Fraunhofer model is certainly applicable to the UK (the Fraunhofer modelIntroducing Fraunhofer Personal reflection I have taken a keen interest in Fraunhofer Geselleschaft

Mottram, Nigel

70

The Reflecting Microscope  

Science Journals Connector (OSTI)

...INVESTIGATION OF CATADIOPTRIC SCHWARZSCHILD SYSTEMS, JOURNAL OF THE OPTICAL...PHYSIOLOGY 32 : 489 ( 1949 ). SCHWARZSCHILD, K, GESELLSCHAFT WISS MP...USE OF REFLECTING SYSTEMS of mirror-pairs in microscope objectives...0.65 with an aspheric mirror-pair of Schwarzsehild...

Robert C. Mellors

1950-10-06T23:59:59.000Z

71

On the challenges of tomography retrievals of a 2D water vapor field using ground-based microwave radiometers: An observation system simulation experiment  

Science Journals Connector (OSTI)

Two-dimensional water vapor fields were retrieved by simulated measurements from multiple ground-based microwave radiometers using a tomographic approach. The goal of this paper was to investigate how the various aspects of the instrument set-up (...

Véronique Meunier; David D. Turner; Pavlos Kollias

72

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

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

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

73

Comparison of Historical Satellite-Based Estimates of Solar Radiation Resources with Recent Rotating Shadowband Radiometer Measurements: Preprint  

SciTech Connect (OSTI)

The availability of rotating shadow band radiometer measurement data at several new stations provides an opportunity to compare historical satellite-based estimates of solar resources with measurements. We compare mean monthly daily total (MMDT) solar radiation data from eight years of NSRDB and 22 years of NASA hourly global horizontal and direct beam solar estimates with measured data from three stations, collected after the end of the available resource estimates.

Myers, D. R.

2009-03-01T23:59:59.000Z

74

A reactionless, bearingless linear shutter mechanism for the multispectral pushbroom imaging radiometer  

SciTech Connect (OSTI)

The Atmospheric Radiation Measurement Program is a multi-laboratory, interagency program as part of DOE`s principal entry into the US Global Change Research Program. Two issues addressed are the radiation budget and its spectral dependence, and radiative and other properties of clouds. Measures of solar flux divergence and energy exchanges between clouds, the earth, its oceans, and the atmosphere through various altitudes are sought. Additionally, the program seeks to provide measurements to calibrate satellite radiance products and validate their associated flux retrieval algorithms. Unmanned Aerospace Vehicles fly long, extended missions. MPIR is one of the primary instruments on the ARM-UAV campaigns. A shutter mechanism has been developed and flown as part of an airborne imaging radiometer having application to spacecraft or other applications requiring low vibration, high reliability, and long life. The device could be employed in other cases where a reciprocating platform is needed. Typical shutters and choppers utilize a spinning disc, or in very small instruments, a vibrating vane to continually interrupt incident light or radiation that enters the system. A spinning disk requires some sort of bearings that usually have limited life, and at a minimum introduce issues of reliability. Friction, lubrication and contamination always remain critical areas of concern, as well as the need for power to operate. Dual vibrating vanes may be dynamically well balanced as a set and are frictionless. However, these are limited by size in a practical sense. In addition, multiples of these devices are difficult to synchronize.

Krumel, L.J.

1996-12-31T23:59:59.000Z

75

Solar Reflectance Index Calculator  

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

Reflectance Index Calculator Reflectance Index Calculator ASTM Designation: E 1980-01 Enter A State: Select a state Alabama Alaska Arkansas Arizona California Colorado Connecticut Delaware Florida Georgia Hawaii Iowa Idaho Illinois Indiana Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana North Carolina North Dakota Nebraska Nevada New Hampshire New Jersey New Mexico New York Ohio Oklahoma Oregon Pennsylvania Pacific Islands Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington Wisconsin West Virginia Wyoming Canadian Cities Enter A City: Select a city Wind Speed (mph) Wind Speed (m/s) Please input both the SR and the TE and the convection coeficient and surface temperature will be calculated

76

Reflection of nanoparticles  

E-Print Network [OSTI]

This work is devoted to molecular dynamics modeling of collision of nanoparticle having a small number of degrees of freedom with a structureless plain. The new regularities are established that determine properties of such particles. Generalized collision law is obtained where particle properties are determined by two coefficient, on of which corresponds to restitution coefficient. The discovered regularity predicts the existence of anomalous mode of particle reflection from a massive plain. In this mode, velocity of nanoparticle after reflection from a plain can exceed the initial one. The criterion of realization of such mode is obtained. Anomalous collision mode was observed during numerical modeling. Physical mechanism are discussed of phenomena that are observed during numerical experiments.

M. A. Ratner; A. V. Tur; V. V. Yanovsky

2013-12-18T23:59:59.000Z

77

Microwave Properties of Ice-Phase Hydrometeors for Radar and Radiometers: Sensitivity to Model Assumptions  

Science Journals Connector (OSTI)

A simplified framework is presented for assessing the qualitative sensitivities of computed microwave properties, satellite brightness temperatures, and radar reflectivities to assumptions concerning the physical properties of ice-phase ...

Benjamin T. Johnson; Grant W. Petty; Gail Skofronick-Jackson

2012-12-01T23:59:59.000Z

78

The R/V Discoverer cruise to Manus Island. The BNL Portable Radiometer Package (PRP) evaluation  

SciTech Connect (OSTI)

Brookhaven National Laboratory installed and operated a Portable Radiation Package (PRP) on the NOAA ship R/V DISCOVERER as part of the Combined Sensor Program cruise in the Tropical Western Pacific Ocean. The DISCOVERER transported a collection of radiation and atmospheric instrumentation to positions offshore of manus Island to compare cloud and radiation fields to like instruments measured from a station on the island. The ship sailed NW from Pago Pago, American Samoa, on 14 March 1996 to a latitude of 1{degree}S then due West until it approached manus Island (2{degree}S and 148{degree}E) on approximately 7 April. The ship then turned SW and approached Manus Island in three steps. This route was reversed during the ship`s return to Hawaii. The PRP package is a compact low-power integration of simple sensors that measure long- and short-wave irradiance from moving platforms. A rapid rotating shadowband radiometer that is designed to provide good estimates of diffuse (sky) radiation even from moving buoys or ships was being evaluated. The PRP provided the only means of making diffuse (sky) radiation measurements from the ship. The CSP cruise provided an excellent opportunity to intercompare the PRP with other like instruments in the TWP locale. The unit was located on the starboard flying bridge which was fully exposed to direct sunlight during the ship`s westward transit. When the ship was at its closest approach to manus, the PRP was moved to the island where careful intercomparison with the Manus instrumentation was conducted.

Reynolds, R.M.; Smith, S.

1996-05-24T23:59:59.000Z

79

Results of First Outdoor Comparison Between Absolute Cavity Pyrgeometer (ACP) and Infrared Integrating Sphere (IRIS) Radiometer at PMOD (Presentation)  

SciTech Connect (OSTI)

The ACP and IRIS are developed to establish a world reference for calibrating pyrgeometers with traceability to SI units. The two radiometers are unwindowed with negligible spectral dependence, and traceable to SI units through the temperature scale (ITS-90). The first outdoor comparison between the two designs was held from January 28 to February 8, 2013 at the Physikalisch-Metorologisches Observatorium Davos (PMOD). The difference between the irradiance measured by ACP and that of IRIS was within 1 W/m2. A difference of 5 W/m2 was observed between the irradiance measured by ACP&IRIS and that of the interim World Infrared Standard Group (WISG).

Reda, I.; Grobner, J.; Wacker, S.; Stoffel, T.

2013-03-01T23:59:59.000Z

80

Synthesis of macrocyclic polyaminocarboxylates and their use for preparing stable radiometal antibody immunoconjugates for therapy, SPECT and PET imaging  

DOE Patents [OSTI]

A simple method for the synthesis of 1,4,7,10-tetraazacyclododecane N,N{prime}N{double_prime},N{prime}{double_prime}-tetraacetic acid and 1,4,8,11-tetraazacyclotetradecane N,N{prime},N{double_prime},N{prime}{double_prime}-tetraacetic acid involves cyanomethylating 1,4,7,10-tetraazacyclododecane or 1,4,8,11-tetraazacyclotetradecane to form a tetranitrile and hydrolyzing the tetranitrile. These macrocyclic compounds are functionalized through one of the carboxylates and then conjugated to various biological molecules including monoclonal antibodies. The resulting conjugated molecules are labeled with radiometals for SPECT and PET imaging and for radiotherapy. 4 figs.

Mease, R.C.; Mausner, L.F.; Srivastava, S.C.

1995-06-27T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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 - Midlatitude Continental Convective Clouds Microwave Radiometer Profiler (jensen-mwr)  

SciTech Connect (OSTI)

A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

Jensen, Mike

2012-02-01T23:59:59.000Z

82

Failure and Redemption of Multifilter Rotating Shadowband Radiometer (MFRSR)/Normal Incidence Multifilter Radiometer (NIMFR) Cloud Screening: Contrasting Algorithm Performance at Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) and Southern Great Plains (SGP) Sites  

SciTech Connect (OSTI)

Well-known cloud-screening algorithms, which are designed to remove cloud-contaminated aerosol optical depths (AOD) from AOD measurements, have shown great performance at many middle-to-low latitude sites around the world. However, they may occasionally fail under challenging observational conditions, such as when the sun is low (near the horizon) or when optically thin clouds with small spatial inhomogeneity occur. Such conditions have been observed quite frequently at the high-latitude Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) sites. A slightly modified cloud-screening version of the standard algorithm is proposed here with a focus on the ARM-supported Multifilter Rotating Shadowband Radiometer (MFRSR) and Normal Incidence Multifilter Radiometer (NIMFR) data. The modified version uses approximately the same techniques as the standard algorithm, but it additionally examines the magnitude of the slant-path line of sight transmittance and eliminates points when the observed magnitude is below a specified threshold. Substantial improvement of the multi-year (1999-2012) aerosol product (AOD and its Angstrom exponent) is shown for the NSA sites when the modified version is applied. Moreover, this version reproduces the AOD product at the ARM Southern Great Plains (SGP) site, which was originally generated by the standard cloud-screening algorithms. The proposed minor modification is easy to implement and its application to existing and future cloud-screening algorithms can be particularly beneficial for challenging observational conditions.

Kassianov, Evgueni I.; Flynn, Connor J.; Koontz, Annette S.; Sivaraman, Chitra; Barnard, James C.

2013-09-11T23:59:59.000Z

83

Variable area light reflecting assembly  

DOE Patents [OSTI]

Device is described for tracking daylight and projecting it into a building. The device tracks the sun and automatically adjusts both the orientation and area of the reflecting surface. The device may be mounted in either a wall or roof of a building. Additionally, multiple devices may be employed in a light shaft in a building, providing daylight to several different floors. The preferred embodiment employs a thin reflective film as the reflecting device. One edge of the reflective film is fixed, and the opposite end is attached to a spring-loaded take-up roller. As the sun moves across the sky, the take-up roller automatically adjusts the angle and surface area of the film. Additionally, louvers may be mounted at the light entrance to the device to reflect incoming daylight in an angle perpendicular to the device to provide maximum reflective capability when daylight enters the device at non-perpendicular angles. 9 figs.

Howard, T.C.

1986-12-23T23:59:59.000Z

84

GVR (G-Band Vapor Radiometer) M.P. Cadeddu and J.C. Liljegren Argonne Natl. Laboratory  

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

ARM 90/150 GHz data at ARM 90/150 GHz data at COPS M.P. Cadeddu, A. Vogelmann, D.D. Turner, S. Crewell, U. Lönhert MWRHF (90/150) data Data available at archives from 06/22 to 12/31 Challenges associated with instrument: New instrument - new technology We still need to learn about calibration Spectral region (WV continuum) still uncertain in models Data available at archives from 06/22 to 12/31 Challenges associated with instrument: New instrument - new technology We still need to learn about calibration Spectral region (WV continuum) still uncertain in models Weather conditions were not ideal for the initial testing of the instrument. The radiometer did not calibrate from 06/30 until 10/13 The few calibrations in June may have been affected by dew formation Calibration of summer data is

85

Retrieval of Aerosol Optical Depth in Vicinity of Broken Clouds from Reflectance Ratios: Case Study  

SciTech Connect (OSTI)

A recently developed reflectance ratio (RR) method for the retrieval of aerosol optical depth (AOD) is evaluated using extensive airborne and ground-based data sets collected during the Cloud and Land Surface Interaction Campaign (CLASIC) and the Cumulus Humilis Aerosol Processing Study (CHAPS), which took place in June 2007 over the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Southern Great Plains site. A detailed case study is performed for a field of single-layer shallow cumuli observed on June 12, 2007. The RR method is applied to retrieve the spectral values of AOD from the reflectance ratios measured by the MODIS Airborne Simulator (MAS) for two pairs of wavelengths (660 and 470 nm and 870 and 470 nm) collected at a spatial resolution of 0.05 km. The retrieval is compared with an independent AOD estimate from three ground-based Multi-filter Rotating Shadowband Radiometers (MFRSRs). The interpolation algorithm that is used to project MFRSR point measurements onto the aircraft flight tracks is tested using AOD derived from NASA Langley High Spectral Resolution Lidar (HSRL). The RR AOD estimates are in a good agreement (within 5%) with the MFRSR-derived AOD values for the 660-nm wavelength. The AODs obtained from MAS reflectance ratios overestimate those derived from MFRSR measurements by 15-30% for the 470-nm wavelength and underestimate the 870-nm AOD by the same amount.

Kassianov, Evgueni I.; Ovchinnikov, Mikhail; Berg, Larry K.; McFarlane, Sally A.; Flynn, Connor J.; Ferrare, Richard; Hostetler, Chris A.; Alexandrov, Mikhail

2010-10-06T23:59:59.000Z

86

An efficient strategy for the inversion of bidirectional reflectance models with satellite remote sensing data  

SciTech Connect (OSTI)

The angular distribution of radiation scattered by the earth surface contains information on the structural and optical properties of the surface. Potentially, this information may be retrieved through the inversion of surface bidirectional reflectance distribution function (BRDF) models. This report details the limitations and efficient application of BRDF model inversions using data from ground- and satellite-based sensors. A turbid medium BRDF model, based on the discrete ordinates solution to the transport equation, was used to quantify the sensitivity of top-of-canopy reflectance to vegetation and soil parameters. Results were used to define parameter sets for inversions. Using synthetic reflectance values, the invertibility of the model was investigated for different optimization algorithms, surface and sampling conditions. Inversions were also conducted with field data from a ground-based radiometer. First, a soil BRDF model was inverted for different soil and sampling conditions. A condition-invariant solution was determined and used as the lower boundary condition in canopy model inversions. Finally, a scheme was developed to improve the speed and accuracy of inversions.

Privette, J.L.

1994-12-31T23:59:59.000Z

87

Ultrasonic flowmetering with reflected pulses  

E-Print Network [OSTI]

A transit time type ultrasonic flowmeter was tested with two different reflected pulse trajectories in flowing air at ambient conditions against an orifice meter. The flowmeter was designed to be highly accurate, to require ...

Hoyle, David C.

1984-01-01T23:59:59.000Z

88

Low reflectance radio frequency load  

DOE Patents [OSTI]

A load for traveling microwave energy has an absorptive volume defined by cylindrical body enclosed by a first end cap and a second end cap. The first end cap has an aperture for the passage of an input waveguide with a rotating part that is coupled to a reflective mirror. The inner surfaces of the absorptive volume consist of a resistive material or are coated with a coating which absorbs a fraction of incident RF energy, and the remainder of the RF energy reflects. The angle of the reflector and end caps is selected such that reflected RF energy dissipates an increasing percentage of the remaining RF energy at each reflection, and the reflected RF energy which returns to the rotating mirror is directed to the back surface of the rotating reflector, and is not coupled to the input waveguide. Additionally, the reflector may have a surface which generates a more uniform power distribution function axially and laterally, to increase the power handling capability of the RF load. The input waveguide may be corrugated for HE11 mode input energy.

Ives, R. Lawrence; Mizuhara, Yosuke M

2014-04-01T23:59:59.000Z

89

Did 1998 Reflect Structural Change?  

Gasoline and Diesel Fuel Update (EIA)

Did 1998 Reflect Structural Change? Did 1998 Reflect Structural Change? 5/17/99 Click here to start Table of Contents PPT Slide Did 1998 Reflect Structural Change? Demand U.S. Propane Demand Sectors (1996) PPT Slide 1998 Propane Prices Fell with Crude Oil PPT Slide Warm Weather Behind Demand Decline 1998 Warm Weather Kept Demand Down Supply Propane Production Fell in 1998 1998 Propane Net Imports Increased Algeria Was Major Source of ‘98 Import Increase U.S. Chemical Use & Large Storage Attracts Excess Propane Petroleum & Propane Market Over Supply Average Stock Levels: Crude Market & Propane Futures Market Incentives to Build Petroleum Stocks New “Structure” or Cycle? Near-Term Future Large January Draw Did Not Remove Excess How Might Excess Stocks Decline? Near Term U.S. Propane Production

90

Acetylene Ester from Aster spinosus  

Science Journals Connector (OSTI)

...STUDIES RELATED TO NATURALLY-OCCURING ACETYLENE COMPOUNDS .6...knowl-edge of the structures of naturally-occurring acetylenes may...ultra-violet or other radiation, or heat was applied to the...conditions which might have arisen naturally can be approximated by thermodynamic...

Jeffrey C. Spitzer; Cornelius Steelink

1964-12-11T23:59:59.000Z

91

Reflection Survey | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Reflection Survey Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Reflection Survey Details Activities (35) Areas (22) Regions (2) NEPA(3) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Seismic Techniques Parent Exploration Technique: Active Seismic Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities. Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc. Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation. Thermal: High temperatures and pressure impact the compressional and shear wave velocities.

92

LBA-ECO Data Sets Released, January 2007  

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

announces the release of two data sets associated with the announces the release of two data sets associated with the LBA-ECO component of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA). The data set entitled "LBA-ECO TG-07 Forest Structure Measurements for GLAS Validation: Santarem 2004" provides the results of GLAS (the Geoscience Laser Altimer System) forest structure validation surveys conducted along transects at the Santarem and Sao Jorge forest sites. The data set entitled "LBA-ECO LC-23 ASTER and MODIS Fire Data Comparison for Brazil: 2003-2004" provides data associated with MODIS (Moderate Resolution Imaging Spectroradiometer) fire maps generated using two different algorithms and compared against fire maps produced by ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer). One

93

Monitoring of Precipitable Water Vapor and Cloud Liquid Path from Scanning Microwave Radiometers During the 2003 Cloudiness Inter-Comparison Experiment  

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

Monitoring of Precipitable Water Vapor and Cloud Liquid Monitoring of Precipitable Water Vapor and Cloud Liquid Path from Scanning Microwave Radiometers During the 2003 Cloudiness Inter-Comparison Experiment V. Mattioli Department of Electronic and Information Engineering University of Perugia Perugia, Italy E. R. Westwater Cooperative Institute for Research in Environmental Sciences University of Colorado National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado V. Morris Pacific Northwest National Laboratory Richland, Washington Introduction Ground-based microwave radiometers (MWR) are widely used to measure atmospheric precipitable water vapor (PWV) and cloud liquid path (CLP). Comparisons of PWV derived from MWRs with water vapor retrievals from instruments like radiosondes, Global Positioning System (GPS) and Raman

94

December2010 AboutReflections  

E-Print Network [OSTI]

1 December2010 AboutReflections On October 22nd , in the Canada Room, almost 50 of us gathered Survey. Asking the assembled company in the Canada Room`what bugs students?' quickly brought. We lead with an article by Professor Phil Race, Emeritus Professor at Leeds Metropolitan University

Müller, Jens-Dominik

95

Cumulus Clouds and Reflected Sunlight  

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

Cumulus Clouds and Reflected Sunlight Cumulus Clouds and Reflected Sunlight from Landsat ETM+ G. Wen and L. Oreopoulos National Aeronautics and Space Administration Goddard Space Flight Center University of Maryland Baltimore County Joint Center of Earth System Technology Greenbelt, Maryland R. F. Cahalan and S. C. Tsay National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland Introduction Cumulus clouds attenuate solar radiation casting shows on the ground. Cumulus clouds can also enhance solar radiation in the clear region nearby. The enhancement of down-welling solar radiation has been observed at the ground level in the clear region near cumulus clouds (Mims and Frederick 1994). The additional diffuse radiation source from cumulus clouds makes the clear gaps appear to be

96

Andreev reflection in bilayer graphene  

Science Journals Connector (OSTI)

We consider the differential conductance of a normal-superconductor junction in clean bilayer graphene in the framework of the Dirac–Bogoliubov–de Gennes equation. A remarkable suppression of the differential conductance at voltages just below the superconducting gap is found. This can be understood in terms of the spinor structures of the electron and hole excitations, in particular, the reflected valence-band hole being orthogonal to the incoming electron at normal incidence.

T. Ludwig

2007-05-18T23:59:59.000Z

97

Simulated impact of sensor field of view and distance on field measurements of bidirectional reflectance factors for row crops  

Science Journals Connector (OSTI)

Abstract It is well established that a natural surface exhibits anisotropic reflectance properties that depend on the characteristics of the surface. Spectral measurements of the bidirectional reflectance factor (BRF) at ground level provide us a method to capture the directional characteristics of the observed surface. Various spectro-radiometers with different field of views (FOVs) were used under different mounting conditions to measure crop reflectance. The impact and uncertainty of sensor FOV and distance from the target have rarely been considered. The issue can be compounded with the characteristic reflectance of heterogeneous row crops. Because of the difficulty of accurately obtaining field measurements of crop reflectance under natural environments, a method of computer simulation was proposed to study the impact of sensor FOV and distance on field measured BRFs. A Monte Carlo model was built to combine the photon spread method and the weight reduction concept to develop the weighted photon spread (WPS) model to simulate radiation transfer in architecturally realistic canopies. Comparisons of the Monte Carlo model with both field BRF measurements and the RAMI Online Model Checker (ROMC) showed good agreement. \\{BRFs\\} were then simulated for a range of sensor FOV and distance combinations and compared with the reference values (distance at infinity) for two typical row canopy scenes. Sensors with a finite FOV and distance from the target approximate the reflectance anisotropy and yield average values over FOV. Moreover, the perspective projection of the sensor causes a proportional distortion in the sensor FOV from the ideal directional observations. Though such factors inducing the measurement error exist, it was found that the BRF can be obtained with a tolerable bias on ground level with a proper combination of sensor FOV and distance, except for the hotspot direction and the directions around it. Recommendations for the choice of sensor FOV and distance are also made to reduce the bias from the real angular signatures in field BRF measurement for row crops.

Feng Zhao; Yuguang Li; Xu Dai; Wout Verhoef; Yiqing Guo; Hong Shang; Xingfa Gu; Yanbo Huang; Tao Yu; Jianxi Huang

2015-01-01T23:59:59.000Z

98

Intermediate frequency band digitized high dynamic range radiometer system for plasma diagnostics and real-time Tokamak control  

SciTech Connect (OSTI)

An intermediate frequency (IF) band digitizing radiometer system in the 100-200 GHz frequency range has been developed for Tokamak diagnostics and control, and other fields of research which require a high flexibility in frequency resolution combined with a large bandwidth and the retrieval of the full wave information of the mm-wave signals under investigation. The system is based on directly digitizing the IF band after down conversion. The enabling technology consists of a fast multi-giga sample analog to digital converter that has recently become available. Field programmable gate arrays (FPGA) are implemented to accomplish versatile real-time data analysis. A prototype system has been developed and tested and its performance has been compared with conventional electron cyclotron emission (ECE) spectrometer systems. On the TEXTOR Tokamak a proof of principle shows that ECE, together with high power injected and scattered radiation, becomes amenable to measurement by this device. In particular, its capability to measure the phase of coherent signals in the spectrum offers important advantages in diagnostics and control. One case developed in detail employs the FPGA in real-time fast Fourier transform (FFT) and additional signal processing. The major benefit of such a FFT-based system is the real-time trade-off that can be made between frequency and time resolution. For ECE diagnostics this corresponds to a flexible spatial resolution in the plasma, with potential application in smart sensing of plasma instabilities such as the neoclassical tearing mode (NTM) and sawtooth instabilities. The flexible resolution would allow for the measurement of the full mode content of plasma instabilities contained within the system bandwidth.

Bongers, W. A.; Beveren, V. van; Westerhof, E.; Goede, A. P. H.; Krijger, B.; Berg, M. A. van den; Graswinckel, M. F.; Schueller, F. C. [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein (Netherlands); Thoen, D. J. [Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft (Netherlands); Nuij, P. J. W. M. [Eindhoven University of Technology, Control Systems Technology Group, and Applied Physics Department, PO Box 513, NL-5600 MB Eindhoven (Netherlands); Baar, M. R. de; Donne, A. J. H.; Hennen, B. A. [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein (Netherlands); Eindhoven University of Technology, Control Systems Technology Group, and Applied Physics Department, PO Box 513, NL-5600 MB Eindhoven (Netherlands); Kantor, M. [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein (Netherlands); Forschungszentrum Juelich GMBH, Institute of Energy and Climate research, Plasma Physics, Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Juelich (Germany); Ioffe Institute, RAS, Saint-Petersburg, 195256 (Russian Federation)

2011-06-15T23:59:59.000Z

99

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS  

E-Print Network [OSTI]

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS University of Tokyo Noda, Chiba 278-8510, Japan Abstract. Green functions called symbols. Generali* *zing this, we define Green functions associated to complex reflection

Shoj, Toshiaki

100

Spatial Convergence of Bidirectional Reflectance Models  

Science Journals Connector (OSTI)

Analyses of bidirectional reflectance data are presented with implications regarding the spatial scales appropriate for inferring irradiances from radiances reflected by various surface–atmosphere scenes. Multiple-angle radiance data collected in ...

John M. Davis; Stephen K. Cox

1998-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Introduction Abstract reflection groups and abstract buildings  

E-Print Network [OSTI]

Introduction Abstract reflection groups and abstract buildings Their geometric realizations Compactly supported cohomology L2 -cohomology Cohomology of Coxeter groups and buildings Mike Davis (work groups and buildings #12;Introduction Abstract reflection groups and abstract buildings Their geometric

Vogtmann, Karen

102

Lensless X-Ray Imaging in Reflection  

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

Lensless X-Ray Imaging in Reflection Lensless X-Ray Imaging in Reflection Print Wednesday, 26 October 2011 00:00 The advent of x-ray free-electron laser (XFEL) light sources has...

103

Design of a Shadowband Spectral Radiometer for the Retrieval of Thin Cloud Optical Depth, Liquid Water Path, and the Effective Radius  

SciTech Connect (OSTI)

The design and operation of a Thin-Cloud Rotating Shadowband Radiometer (TCRSR) described here was used to measure the radiative intensity of the solar aureole and enable the simultaneous retrieval of cloud optical depth, drop effective radius, and liquid water path. The instrument consists of photodiode sensors positioned beneath two narrow metal bands that occult the sun by moving alternately from horizon to horizon. Measurements from the narrowband 415-nm channel were used to demonstrate a retrieval of the cloud properties of interest. With the proven operation of the relatively inexpensive TCRSR instrument, its usefulness for retrieving aerosol properties under cloud-free skies and for ship-based observations is discussed.

Bartholomew M. J.; Reynolds, R. M.; Vogelmann, A. M.; Min, Q.; Edwards, R.; Smith, S.

2011-11-01T23:59:59.000Z

104

Prototype Validation Exercise (PROVE) Project  

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

Validation > PROVE Validation > PROVE The Prototype Validation Exercise (PROVE) Project Overview The Prototype Validation Exercise (PROVE) was a mini field campaign conducted at the Jornada Experimental Range in the Chihuahuan Desert, near Las Cruces, New Mexico in May 1997. The goals of PROVE were to: Gain experience in the collection and use of field data for EOS product validation Develop protocols for coordination, measurement, and data archival Compile a synoptic land and atmospheric data set for testing algorithms The remote-sensing portion of PROVE involved investigators from three NASA Earth Observing System (EOS) instrument teams: MODIS (Moderate-Resolution Imaging Spectrometer) ASTER (Advanced Space-borne Thermal Emission and Reflectance Radiometer) MISR (Multi-Angle Imaging Spectro Radiometer)

105

Reflective ghost imaging through turbulence  

SciTech Connect (OSTI)

Recent work has indicated that ghost imaging may have applications in standoff sensing. However, most theoretical work has addressed transmission-based ghost imaging. To be a viable remote-sensing system, the ghost imager needs to image rough-surfaced targets in reflection through long, turbulent optical paths. We develop, within a Gaussian-state framework, expressions for the spatial resolution, image contrast, and signal-to-noise ratio of such a system. We consider rough-surfaced targets that create fully developed speckle in their returns and Kolmogorov-spectrum turbulence that is uniformly distributed along all propagation paths. We address both classical and nonclassical optical sources, as well as a computational ghost imager.

Hardy, Nicholas D.; Shapiro, Jeffrey H. [Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2011-12-15T23:59:59.000Z

106

Spectral Reflectance of Silicon Photodiodes  

E-Print Network [OSTI]

Introduction Silicon photodiodes are among the most popular photodetectors that combine high performance over a wide wavelength range with unparalleled ease of use. High-quality photodiodes, in the form of a trap detector, 1,2 have many significant applications in precision radiometry. Their predictable responsivity in visible and near-infrared ~NIR! wavelengths allows the realization of high-accuracy spectral responsivity scales. 3,4 The spectral responsivity scales can be utilized in, for example, realization of luminous intensity 5,6 and spectral irradiance scales. 7,8 The spectral responsivity of a silicon photodiode is determined by the reflectance of the diode surface r~l! and the internal quantum deficiency d~l!. The values of d~l! and r~l! can be extrapolated 4 by mathematical models. To extrapolate the val

Atte Haapalinna; Petri Kärhä; Erkki Ikonen

107

MWRRET (Microwave Radiometer Retrievals)  

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

Plus Plus Plus Andy Vogelmann, Dave Turner Andy Vogelmann, Dave Turner & Jennifer Comstock & Jennifer Comstock Min Min Susanne Crewell Susanne Crewell Ulrich L Ulrich L ö ö rnard rnard Jim Liljegren Jim Liljegren John Ogre John Ogre . Y. Matrosov . Y. Matrosov Sally McFarlane Sally McFarlane Warren Wiscombe, Christine Chiu, Sasha Marshak, Maria Warren Wiscombe, Christine Chiu, Sasha Marshak, Maria Cadeddu, Qilong Min, Susanne Crewell, Ulrich L Cadeddu, Qilong Min, Susanne Crewell, Ulrich L ö ö hnert, Mandy hnert, Mandy M. Khaiyer, Greg McFarquhar , Chuck Long, Bill O M. Khaiyer, Greg McFarquhar , Chuck Long, Bill O ' ' Hirok, Bin Hirok, Bin Lin, Connor Flynn, Eli Mlawer, Graham Feingold, Jim Barnard, Lin, Connor Flynn, Eli Mlawer, Graham Feingold, Jim Barnard,

108

Radiometer Calibration Trends  

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

Wilcox, T. L. Stoffel, and D. R. Myers National Renewable Energy Laboratory Golden, Colorado Abstract Calibrations of Atmospheric Radiation Measurement (ARM) broadband...

109

Inexpensive photovoltaic solar radiometer  

Science Journals Connector (OSTI)

Using a solar cell as a sensor a low?cost instrument can be constructed which measures both the instantaneous and integrated value of solar flux. The process of constructing and calibrating the instrument constitutes an excellent undergraduate experimental project affording the student an opportunity to examine a variety of aspects associated with solar energy measurements.

Fritz Kissner

1981-01-01T23:59:59.000Z

110

Reflection Survey (Nannini, 1986) | Open Energy Information  

Open Energy Info (EERE)

Reflection Survey (Nannini, 1986) Reflection Survey (Nannini, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey (Nannini, 1986) Exploration Activity Details Location Unspecified Exploration Technique Reflection Survey Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes "seismic analyses" - no indication of active/passive, reflection/refraction, etc. ---> "On the contrary, in areas with little or no volcanic activity, assumptions on the nature, size and characteristics of the source of the thermal anomaly are generally much more difficult and hypothetical. In these circumstances, some useful data can be obtained from accurate seismic analyses, together with a seismotectonic and geodynamic

111

Definition: Reflection Survey | Open Energy Information  

Open Energy Info (EERE)

Reflection Survey Reflection Survey Jump to: navigation, search Dictionary.png Reflection Survey Seismic reflection surveys image the structure of the subsurface through the measurement of the two way travel time of reflected artificially-generated elastic waves.[1] View on Wikipedia Wikipedia Definition Also Known As Seismic Reflection References ↑ http://www.amazon.com/Introduction-Geophysical-Prospecting-Milton-Dobrin/dp/0071004041 Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like. rieved from "http://en.openei.org/w/index.php?title=Definition:Reflection_Survey&oldid=598371" Category: Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

112

Multiple-band reflective polarization converter using U-shaped metamaterial  

SciTech Connect (OSTI)

A multiple-band metamaterial reflective polarization converter (RPC) is proposed, which is composed of the dielectric substrate sandwiched with U-shaped metallic patterns and continuous metal film. The proposed U-shaped metamaterial RPC (UMM-RPC) can convert a linearly polarized wave to its cross polarized wave at the three resonant frequencies, which also can convert the linearly polarized wave to circularly polarized wave at other three resonant frequencies. Furthermore, the proposed UMM-RPC can maintain the same conversional direction at the three resonant frequencies when incident on a circularly polarized wave. The simulated and measured results are in agreement in the entire frequency range, and the polarization conversion ratio is over 90% for both linear and circular polarizations. The surface current distributions of the UMM-RPC are discussed to look into the physical mechanism. The proposed UMM-RPC has simple geometry but more operating frequency bands compared to the previous designs and can be used in applications such as antenna radome, remote sensors, and radiometer.

Huang, Xiaojun [College of Physical Science and Technology, Central China Normal University, Wuhan 430079 (China); Department of Physics, Kashgar Teachers College, Kashgar 844000 (China); Yang, Dong [College of Physics and Electronics Science, Hubei Normal University, Huangshi 435002 (China); Yang, Helin, E-mail: emyang@mail.ccnu.edu.cn [College of Physical Science and Technology, Central China Normal University, Wuhan 430079 (China)

2014-03-14T23:59:59.000Z

113

Acoustic horn reflectance: Equations and measurements  

Science Journals Connector (OSTI)

Reflectance is the transfer function between forward and reflected components of pressure waves that propagate in wave guides such as acoustic horns. Exact solutions to Webster's Horn Equation are only known for a few specific shapes including parabolic conical and exponential. Explicit equations for reflectance in these three horn shapes were recently published for infinite-length horns. Measured reflectance in 3D-printed finite-length examples of these horn shapes show no similarity in the frequency-domain to exact reflectance for infinite-length horns. The similarity improves after adjustments to both the equations and the measurements. New equations were derived for exact reflectance of finite-length horns. Measured reflectance was smoothed by time-domain windowing. In contrast to frequency-domain reflectance comparisons of time-domain reflectance prior to the time sound reaches the end of the horn were not much affected by these adjustments. Because exact equations are known and 3D-printed examples are easy to obtain these three horn shapes may be useful as standards for comparing different reflectance-measurement systems.

2014-01-01T23:59:59.000Z

114

Thermonuclear Reflect AB-Reactor  

E-Print Network [OSTI]

The author offers a new kind of thermonuclear reflect reactor. The remarkable feature of this new reactor is a three net AB reflector, which confines the high temperature plasma. The plasma loses part of its energy when it contacts with the net but this loss can be compensated by an additional permanent plasma heating. When the plasma is rarefied (has a small density), the heat flow to the AB reflector is not large and the temperature in the triple reflector net is lower than 2000 - 3000 K. This offered AB-reactor has significantly less power then the currently contemplated power reactors with magnetic or inertial confinement (hundreds-thousands of kW, not millions of kW). But it is enough for many vehicles and ships and particularly valuable for tunnelers, subs and space apparatus, where air to burn chemical fuel is at a premium or simply not available. The author has made a number of innovations in this reactor, researched its theory, developed methods of computation, made a sample computation of typical project. The main point of preference for the offered reactor is its likely cheapness as a power source. Key words: Micro-thermonuclear reactor, Multi-reflex AB-thermonuclear reactor, Self-magnetic AB-thermonuclear reactor, aerospace thermonuclear engine.

Alexander Bolonkin

2008-03-26T23:59:59.000Z

115

Photovoltaic module with light reflecting backskin  

DOE Patents [OSTI]

A photovoltaic module comprises electrically interconnected and mutually spaced photovoltaic cells that are encapsulated by a light-transmitting encapsulant between a light-transparent front cover and a back cover, with the back cover sheet being an ionomer/nylon alloy embossed with V-shaped grooves running in at least two directions and coated with a light reflecting medium so as to provide light-reflecting facets that are aligned with the spaces between adjacent cells and oriented so as to reflect light falling in those spaces back toward said transparent front cover for further internal reflection onto the solar cells, whereby substantially all of the reflected light will be internally reflected from said cover sheet back to the photovoltaic cells, thereby increasing the current output of the module. The internal reflector improves power output by as much as 67%.

Gonsiorawski, Ronald C. (Danvers, MA)

2007-07-03T23:59:59.000Z

116

Reflection Spectra from Photoionized Accretion Discs  

E-Print Network [OSTI]

We review recent progress on the modeling and use of reflection spectra from irradiated and ionized accretion discs. On the computational side, calculations of reflection spectra from discs with non-uniform density structure have shown that thermal instabilities can effect the predictions. Ionized reflection spectra have been used effectively in fitting data of Narrow-Line Seyfert 1 galaxies, and have placed constraints on the strength and shape of soft X-ray emission lines.

D. R. Ballantyne; R. R. Ross; A. C. Fabian

2002-04-16T23:59:59.000Z

117

Reflectivity in shock wave fronts of xenon  

Science Journals Connector (OSTI)

New results for the reflection coefficient of shock-compressed dense xenon plasmas at pressures of 1.6–20 GPa and temperatures around 30?000 K are interpreted. Reflectivities typical of metallic systems are found at high densities. A consistent description of the measured reflectivities is achieved if a finite width of the shock wave front is considered. Several mechanisms to give a microscopic explanation for a finite extension of the shock front are discussed.

T Raitza; H Reinholz; G Röpke; V Mintsev; A Wierling

2006-01-01T23:59:59.000Z

118

Plasma Wave Reflection in Slowly Varying Media  

Science Journals Connector (OSTI)

Two mathematical formalisms are presented to describe wave reflection in a slowly varying spatially inhomogeneous thermal plasma described by the Vlasov equation. It is found that the transmitted wave which is the Wentzel?Kramer?Brillouin solution and the reflected wave can be expressed in terms of the local dielectric properties of the medium. In a numerical example it is shown that the intrinsic thermal properties of the plasma can supply reflection mechanisms that compete with the reflection coefficient predicted when the plasma is described by fluid equations.

H. L. Berk; C. W. Horton; M. N. Rosenbluth; R. N. Sudan

1967-01-01T23:59:59.000Z

119

Travel Notes and Reflections from the Netherlands  

E-Print Network [OSTI]

and Reflections from the Netherlands by Jennifer Lynne Mustopopulated, country of the Netherlands. The express purposeficking Work in the Netherlands. ” The project explores

Lynne Musto, Jennifer

2009-01-01T23:59:59.000Z

120

Phenomenological description of bidirectional surface reflection  

E-Print Network [OSTI]

Phenomenological description of bidirectional surface reflection Jan J. Koenderink and Andrea J satellites). In some cases one has (usually approximate, phenomenological) models, but in most cases one

O'Brien, James F.

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Identification coding schemes for modulated reflectance systems  

DOE Patents [OSTI]

An identifying coding apparatus employing modulated reflectance technology involving a base station emitting a RF signal, with a tag, located remotely from the base station, and containing at least one antenna and predetermined other passive circuit components, receiving the RF signal and reflecting back to the base station a modulated signal indicative of characteristics related to the tag.

Coates, Don M. (Santa Fe, NM); Briles, Scott D. (Los Alamos, NM); Neagley, Daniel L. (Albuquerque, NM); Platts, David (Santa Fe, NM); Clark, David D. (Santa Fe, NM)

2006-08-22T23:59:59.000Z

122

Linear efficient antialiased displacement and reflectance mapping  

Science Journals Connector (OSTI)

We present Linear Efficient Antialiased Displacement and Reflectance (LEADR) mapping, a reflectance filtering technique for displacement mapped surfaces. Similarly to LEAN mapping, it employs two mipmapped texture maps, which store the first two moments ... Keywords: BRDF, GPU, LEAN mapping, filtering, microfacet

Jonathan Dupuy; Eric Heitz; Jean-Claude Iehl; Pierre Poulin; Fabrice Neyret; Victor Ostromoukhov

2013-11-01T23:59:59.000Z

123

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS  

E-Print Network [OSTI]

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS TOSHIAKI SHOJI Department of Mathematics Science University of Tokyo Noda, Chiba 278­8510, Japan Abstract. Green functions of classical groups this, we define Green functions associated to complex reflection groups G(e, 1, n), and study

Shoj, Toshiaki

124

The BOOMERANG North America Instrument: A Balloon-borne Bolometric Radiometer Optimized for Measurements of Cosmic Background Radiation Anisotropies from 03 to 4°  

Science Journals Connector (OSTI)

We describe the BOOMERANG North America instrument, a balloon-borne bolometric radiometer designed to map the cosmic microwave background (CMB) radiation with 03 resolution over a significant portion of the sky. This receiver employs new technologies in bolometers, readout electronics, millimeter-wave optics and filters, cryogenics, scan, and attitude reconstruction. All these subsystems are described in detail in this paper. The system has been fully calibrated in flight using a variety of techniques, which are described and compared. Using this system, we have obtained a measurement of the first peak in the CMB angular power spectrum in a single, few hour long balloon flight. The instrument described here was a prototype of the BOOMERANG Long Duration Balloon experiment.

F. Piacentini; P. A. R. Ade; R. S. Bhatia; J. J. Bock; A. Boscaleri; P. Cardoni; B. P. Crill; P. de Bernardis; H. Del Castillo; G. De Troia; P. Farese; M. Giacometti; E. F. Hivon; V. V. Hristov; A. Iacoangeli; A. E. Lange; S. Masi; P. D. Mauskopf; L. Miglio; C. B. Netterfield; P. Palangio; E. Pascale; A. Raccanelli; S. Rao; G. Romeo; J. Ruhl; F. Scaramuzzi

2002-01-01T23:59:59.000Z

125

E-Print Network 3.0 - aqua modis reflectance Sample Search Results  

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

board both Terra and Aqua, MISR on Terra, POLDER on ADEOS, OMI on Aura, GLAS carried on Ice... SpectroRadiometer) on board Terra launched in 1999, and MODIS aboard Aqua launched...

126

Photovoltaic converter having apertured reflective enclosure  

SciTech Connect (OSTI)

This patent describes a photovoltaic converter. It comprises: a photovoltaic cell having an incident face upon which light is directed to cause photogeneration; an enclosure over the incident face, the wall of the enclosure having a reflective inner surface spaced apart from the incident face to permit light reflected from the incident face to be re-reflected by the inner surface and back to the photovoltaic cell; and an aperture through the wall of the enclosure to permit light to fall directly upon the voltaic cell. The ratio of the area of the aperture to the are of the incident face of the photovoltaic cell is less than about 0.2.

Sinton, R.A.; Swanson, R.M.

1990-10-02T23:59:59.000Z

127

MACDONALD FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS  

E-Print Network [OSTI]

MACDONALD FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS. A generalization of Macdonald o* *perators is also constructed, and we characterize such functions by making use of * *Macdonald operators, assuming a certain conjecture

Shoj, Toshiaki

128

MACDONALD FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS  

E-Print Network [OSTI]

MACDONALD FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS TOSHIAKI SHOJI Department version of the above Hall-Littlewood functions, as a generalization of Macdonald functions associated to symmetric groups. A generalization of Macdonald operators is also constructed, and we characterize

Shoj, Toshiaki

129

New dean reflects on Gator Engineering  

E-Print Network [OSTI]

UF Voices New dean reflects on Gator Engineering No engineer is an island. The most suc- cessful questions facing society. It's an exciting time to be a new dean of engineering -- especially Gator

Pilyugin, Sergei S.

130

Lensless X-Ray Imaging in Reflection  

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

X-Ray Imaging in Reflection Print The advent of x-ray free-electron laser (XFEL) light sources has led to an outburst of research activities in the field of lensless imaging. XFELs...

131

Lensless X-Ray Imaging in Reflection  

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

X-Ray Imaging in Reflection Print Wednesday, 26 October 2011 00:00 The advent of x-ray free-electron laser (XFEL) light sources has led to an outburst of research activities...

132

Frustrated total internal reflection acoustic field sensor  

DOE Patents [OSTI]

A frustrated total internal reflection acoustic field sensor which allows the acquisition of the acoustic field over an entire plane, all at once. The sensor finds use in acoustic holography and acoustic diffraction tomography. For example, the sensor may be produced by a transparent plate with transparent support members tall enough to support one or more flexible membranes at an appropriate height for frustrated total internal reflection to occur. An acoustic wave causes the membrane to deflect away from its quiescent position and thus changes the amount of light that tunnels through the gap formed by the support members and into the membrane, and so changes the amount of light reflected by the membrane. The sensor(s) is illuminated by a uniform tight field, and the reflection from the sensor yields acoustic wave amplitude and phase information which can be picked up electronically or otherwise.

Kallman, Jeffrey S. (Pleasanton, CA)

2000-01-01T23:59:59.000Z

133

Reflective masks for extreme ultraviolet lithography  

SciTech Connect (OSTI)

Extreme ultraviolet lithographic masks are made by patterning multilayer reflective coatings with high normal incidence reflectivity. Masks can be patterned by depositing a patterned absorber layer above the coating or by etching the pattern directly into the coating itself. Electromagnetic simulations showed that absorber-overlayer masks have superior imaging characteristics over etched masks (less sensitive to incident angles and pattern profiles). In an EUVL absorber overlayer mask, defects can occur in the mask substrate, reflective coating, and absorber pattern. Electromagnetic simulations showed that substrate defects cause the most severe image degradation. A printability study of substrate defects for absorber overlayer masks showed that printability of 25 nm high substrate defects are comparable to defects in optical lithography. Simulations also indicated that the manner in which the defects are covered by multilayer reflective coatings can affect printability. Coverage profiles that result in large lateral spreading of defect geometries amplify the printability of the defects by increasing their effective sizes. Coverage profiles of Mo/Si coatings deposited above defects were studied by atomic force microscopy and TEM. Results showed that lateral spread of defect geometry is proportional to height. Undercut at defect also increases the lateral spread. Reductions in defect heights were observed for 0.15 {mu}m wide defect lines. A long-term study of Mo/Si coating reflectivity revealed that Mo/Si coatings with Mo as the top layer suffer significant reductions in reflectivity over time due to oxidation.

Nguyen, Khanh Bao

1994-05-01T23:59:59.000Z

134

Reflection Survey (Majer, 2003) | Open Energy Information  

Open Energy Info (EERE)

Reflection Survey (Majer, 2003) Reflection Survey (Majer, 2003) Exploration Activity Details Location Unspecified Exploration Technique Reflection Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes The goal of this work is to evaluate the most promising methods and approaches that may be used for improved geothermal exploration and reservoir assessment. It is not a comprehensive review of all seismic methods used to date in geothermal environments. This work was motivated by a need to assess current and developing seismic technology that if applied in geothermal cases may greatly improve the chances for locating new geothermal resources and/or improve assessment of current ones. References E. L. Majer (2003) 3-D Seismic Methods For Geothermal Reservoir Exploration And Assessment-Summary

135

X-ray induced optical reflectivity  

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

The change in optical reflectivity induced by intense x-ray pulses can now be used to study ultrafast many body responses in solids in the femtosecond time domain. X-ray absorption creates photoelectrons and core level holes subsequently filled by Auger or fluorescence processes, and these excitations ultimately add conduction and valence band carriers that perturb optical reflectivity.Optical absorption associated with band filling and band gap narrowing is shown to explain the basic features found in recent measurements on an insulator (silicon nitride, Si3N4), a semiconductor(gallium arsenide,GaAs), and a metal (gold,Au), obtained with ?100 fs x-ray pulses at 500-2000 eV and probed with 800 nm laser pulses. In particular GaAs exhibits an abrupt drop in reflectivity, persisting only for a time comparable to the x-ray excitation pulse duration, consistent with prompt band gap narrowing.

Durbin, Stephen M.

2012-01-01T23:59:59.000Z

136

Pigments which reflect infrared radiation from fire  

DOE Patents [OSTI]

Conventional paints transmit or absorb most of the intense infrared (IR) radiation emitted by fire, causing them to contribute to the spread of fire. The present invention comprises a fire retardant paint additive that reflects the thermal IR radiation emitted by fire in the 1 to 20 micrometer (.mu.m) wavelength range. The important spectral ranges for fire control are typically about 1 to about 8 .mu.m or, for cool smoky fires, about 2 .mu.m to about 16 .mu.m. The improved inventive coatings reflect adverse electromagnetic energy and slow the spread of fire. Specific IR reflective pigments include titanium dioxide (rutile) and red iron oxide pigments with diameters of about 1 .mu.m to about 2 .mu.m and thin leafing aluminum flake pigments.

Berdahl, Paul H. (Oakland, CA)

1998-01-01T23:59:59.000Z

137

Method of making reflecting film reflector  

DOE Patents [OSTI]

A reflector of the reflecting film type is disclosed and which may be used in a heliostatic system for concentrating solar energy and comprising a reflecting film bonded to an appropriate rigid substrate in such a way that specularity of a very high order is achieved. A method of bonding the reflecting film to the substrate is also disclosed and comprises the steps of initially adhering the film to a smooth, clean flat rigid surface with a non-bonding liquid between the rigid surface and film, and then bonding the substrate and film. The non-bonding liquid has a molecular adhesion greater than any stresses due to handling or curing of the bonding agent which is applied between the film and the opposing surface of the rigid substrate.

Cottingham, James G. (Center Moriches, NY)

1980-01-01T23:59:59.000Z

138

Pigments which reflect infrared radiation from fire  

DOE Patents [OSTI]

Conventional paints transmit or absorb most of the intense infrared (IR) radiation emitted by fire, causing them to contribute to the spread of fire. The present invention comprises a fire retardant paint additive that reflects the thermal IR radiation emitted by fire in the 1 to 20 micrometer ({micro}m) wavelength range. The important spectral ranges for fire control are typically about 1 to about 8 {micro}m or, for cool smoky fires, about 2 {micro}m to about 16 {micro}m. The improved inventive coatings reflect adverse electromagnetic energy and slow the spread of fire. Specific IR reflective pigments include titanium dioxide (rutile) and red iron oxide pigments with diameters of about 1 {micro}m to about 2 {micro}m and thin leafing aluminum flake pigments. 4 figs.

Berdahl, P.H.

1998-09-22T23:59:59.000Z

139

Reflection Survey (Laney, 2005) | Open Energy Information  

Open Energy Info (EERE)

Laney, 2005) Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey (Laney, 2005) Exploration Activity Details Location Unspecified Exploration Technique Reflection Survey Activity Date Usefulness useful DOE-funding Unknown Notes Seismic Imaging, Majer, Gritto and Daley. The project objective includes the development and application of active seismic methods for improved understanding of the subsurface structure, faults, fractures lithology, and fluid paths in geothermal reservoirs. While the objective of the work previous to FY2003 was concerned with the detection and location of faults and fractures based on an existing 3-D seismic data set collected at the Rye Patch geothermal reservoir, the current work was aimed at investigating

140

Emergence of exponentially small reflected waves  

E-Print Network [OSTI]

We study the time-dependent scattering of a quantum mechanical wave packet at a barrier for energies larger than the barrier height, in the semi-classical regime. More precisely, we are interested in the leading order of the exponentially small scattered part of the wave packet in the semiclassical parameter when the energy density of the incident wave is sharply peaked around some value. We prove that this reflected part has, to leading order, a Gaussian shape centered on the classical trajectory for all times soon after its birth time. We give explicit formulas and rigorous error bounds for the reflected wave for all of these times.

Volker Betz; Alain Joye; Stefan Teufel

2008-04-23T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Reflections on layers of the ionosphere, reflections on ionised meteorite trails,  

E-Print Network [OSTI]

. 1.0 Theoretical point of view 1.1 Is a flash of lightning able to reflect radio waves? Any ionised a reflection of VHF or UHF radio waves. A lightning flash ionised channel can be several kilometres long [6 from a flash of lightning? A CC or a CG lightning flash is com- posed of several phases

Boyer, Edmond

142

Electrochromic window with high reflectivity modulation  

DOE Patents [OSTI]

A multi-layered, active, thin film, solid-state electrochromic device having a high reflectivity in the near infrared in a colored state, a high reflectivity and transmissivity modulation when switching between colored and bleached states, a low absorptivity in the near infrared, and fast switching times, and methods for its manufacture and switching are provided. In one embodiment, a multi-layered device comprising a first indium tin oxide transparent electronic conductor, a transparent ion blocking layer, a tungsten oxide electrochromic anode, a lithium ion conducting-electrically resistive electrolyte, a complimentary lithium mixed metal oxide electrochromic cathode, a transparent ohmic contact layer, a second indium oxide transparent electronic conductor, and a silicon nitride encapsulant is provided. Through elimination of optional intermediate layers, simplified device designs are provided as alternative embodiments. Typical colored-state reflectivity of the multi-layered device is greater than 50% in the near infrared, bleached-state reflectivity is less than 40% in the visible, bleached-state transmissivity is greater than 60% in the near infrared and greater than 40% in the visible, and spectral absorbance is less than 50% in the range from 0.65-2.5 .mu.m.

Goldner, Ronald B. (Lexington, MA); Gerouki, Alexandra (Medford, MA); Liu, Te-Yang (Arlington, MA); Goldner, Mark A. (Cambridge, MA); Haas, Terry E. (Southborough, MA)

2000-01-01T23:59:59.000Z

143

Land Surface Reflectance: A Possible Earth Science  

E-Print Network [OSTI]

are in magenta, water bodies are outlined in white. MODIS Surface Reflectance South Africa From: E. Vermote, UMD information ­ Viewing geometry (view and solar zenith and azimuth angles) ­ Geolocation (lat 15, 2005 - Wolfe - San Diego 5 Target Communities · Land earth science community ­ Energy Balance

144

Catheter based mid-infrared reflectance and reflectance generated absorption spectroscopy  

DOE Patents [OSTI]

A method of characterizing conditions in a tissue, by (a) providing a catheter that has a light source that emits light in selected wavenumbers within the range of mid-IR spectrum; (b) directing the light from the catheter to an area of tissue at a location inside a blood vessel of a subject; (c) collecting light reflected from the location and generating a reflectance spectra; and (d) comparing the reflectance spectra to a reference spectra of normal tissue, whereby a location having an increased number of absorbance peaks at said selected wavenumbers indicates a tissue inside the blood vessel containing a physiological marker for atherosclerosis.

Holman, Hoi-Ying N

2013-10-29T23:59:59.000Z

145

Amartya Sen: Reflections on Theory in the Social Sciences  

E-Print Network [OSTI]

Amartya Sen: Reflections on Theory in the Social Scienceswelcomes Nobel Laureate Amartya Sen, Lamont University

Kreisler, Harry

2005-01-01T23:59:59.000Z

146

V-022: Attachmate Reflection Products Java Multiple Vulnerabilities |  

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

2: Attachmate Reflection Products Java Multiple Vulnerabilities 2: Attachmate Reflection Products Java Multiple Vulnerabilities V-022: Attachmate Reflection Products Java Multiple Vulnerabilities November 13, 2012 - 1:00am Addthis PROBLEM: Attachmate Reflection Products Java Multiple Vulnerabilities PLATFORM: Reflection X 2011 Reflection Suite for X 2011 Reflection for Secure IT Server for Windows Reflection for Secure IT Client and Server for UNIX ABSTRACT: Security issues related to Reflection PKI Services Manager REFERENCE LINKS: PKI Services Manager Technical Note 2560 Secunia Advisory SA51256 CVE-2012-0551 CVE-2012-1711 CVE-2012-1713 CVE-2012-1716 CVE-2012-1717 CVE-2012-1718 CVE-2012-1719 CVE-2012-1720 CVE-2012-1721 CVE-2012-1722 CVE-2012-1723 CVE-2012-1724 CVE-2012-1725 CVE-2012-1726 IMPACT ASSESSMENT: High DISCUSSION: Attachmate has acknowledged multiple vulnerabilities in some Reflection

147

U.S. Reflects World Market  

Gasoline and Diesel Fuel Update (EIA)

4 4 Notes: U.S. crude oil inventories reflect the world situation. U.S. inventories were drawn down in 1999 as world demand exceeded world supply of crude oil as OPEC cut back on production. Low crude oil inventories go hand in hand with low product inventories. Product inventories were also drawn down to help meet demand, as was seen with gasoline this Spring. The rise in crude oil inventories earlier this year, while indicating an improvement in the market balance, appears to be short-lived, just as we had predicted a few months ago. Looking at U.S. crude stock levels in April and May can be misleading, since increases then were more reflective of the surge in WTI and U.S. product prices in the 1st quarter. With U.S. crude oil stocks drawn down by more than 20 million barrels from

148

Reflection of Anatolian Culture in Poster Design  

Science Journals Connector (OSTI)

Abstract ‘Visual’ in ‘visual culture’ can be defined as “everything that is visual, functional, communicational and/or having aesthetic purpose produced, interpreted or formed by people” (Barnard, 2002; 34). Accordingly poster is not only a tool that transmits a message, information or that introduces or advertises a product but also a visual cultural element. Just like other visual cultural elements, poster as well is in interaction with the society. In this two way interaction while society's culture, political and social perceptions, level of education, aesthetic tastes influence the production process of the poster, the posters too influence and transform the society. Poster artists and designers are producing studies sometimes affected by the society that they are within, and also sometimes intentionally reflecting the culture of the society that they are addressing. In this context in this study, reflections of the Anatolian culture in poster designs will be examined with visual examples.

Banu ?nanç Uyan Dur

2014-01-01T23:59:59.000Z

149

Global cooling updates: Reflective roofs and pavements  

Science Journals Connector (OSTI)

With increasing the solar reflectance of urban surfaces, the outflow of short-wave solar radiation increases, less solar heat energy is absorbed leading to lower surface temperatures and reduced outflow of thermal radiation into the atmosphere. This process of “negative radiative forcing” effectively counters global warming. Cool roofs also reduce cooling-energy use in air conditioned buildings and increase comfort in unconditioned buildings; and cool roofs and cool pavements mitigate summer urban heat islands, improving outdoor air quality and comfort. Installing cool roofs and cool pavements in cities worldwide is a compelling win–win–win activity that can be undertaken immediately, outside of international negotiations to cap CO2 emissions. We review the status of cool roof and cool pavements technologies, policies, and programs in the U.S., Europe, and Asia. We propose an international campaign to use solar reflective materials when roofs and pavements are built or resurfaced in temperate and tropical regions.

Hashem Akbari; H. Damon Matthews

2012-01-01T23:59:59.000Z

150

Fr219, a transitional reflection asymmetric nucleus  

Science Journals Connector (OSTI)

Mass-separated sources of Ac223 (separated as AcF2+) were used to study the level structure of Fr219 following alpha decay. The levels in Fr219 are interpreted in terms of K=1/2±, 3/2±, and 5/2± parity doublet bands which have a natural theoretical explanation in terms of reflection asymmetric models. The 9/2- ground-state member of the K=1/2- band in Fr219 can be understood in terms of both reflection asymmetry and the collapse of the quadrupole-octupole Nilsson orbitals towards the h9/2 orbitals of spherical symmetry. Comparison of the K=1/2- ground-state bands in Fr219 and Fr221 reveals the details of this transformation. Theoretical analysis of the microscopic structure of several of the positive-parity bands indicates the presence of important Nilsson configurations arising from the shell below.

C. F. Liang; P. Paris; J. Kvasil; R. K. Sheline

1991-08-01T23:59:59.000Z

151

Reflections on Cambridge: Reflections on Isaac Newton, discovery and Cambridge - with apple tree  

E-Print Network [OSTI]

Reflections about the life and effects of Isaac Newton in Cambridge, filmed outside Trinity College, with the descendant of his apple tree behind (and the rooms where he lived and worked). Filmed by Xu Bei in 2009....

Macfarlane, Alan

152

Compact reflective imaging spectrometer utilizing immersed gratings  

DOE Patents [OSTI]

A compact imaging spectrometer comprising an entrance slit for directing light, a first mirror that receives said light and reflects said light, an immersive diffraction grating that diffracts said light, a second mirror that focuses said light, and a detector array that receives said focused light. The compact imaging spectrometer can be utilized for remote sensing imaging spectrometers where size and weight are of primary importance.

Chrisp, Michael P. (Danville, CA)

2006-05-09T23:59:59.000Z

153

Lensless X-Ray Imaging in Reflection  

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

Lensless X-Ray Imaging in Lensless X-Ray Imaging in Reflection Lensless X-Ray Imaging in Reflection Print Wednesday, 26 October 2011 00:00 The advent of x-ray free-electron laser (XFEL) light sources has led to an outburst of research activities in the field of lensless imaging. XFELs combine the advantages of sychrotron light sources (high brightness and x-ray wavelengths relevant to atomic and molecular phenomena) with the advantages of visible-light lasers (highly coherent beams). All of these characteristics are important for coherent x-ray diffraction imaging-lensless imaging techniques that are proving to be integral to single-shot, high-resolution imaging of both complex materials and biological samples. Existing techniques are typically designed for transmission geometry, however, and use isolated objects, requiring special sample fabrication and restricting the type of samples under investigation. Recently, researchers from the ALS and the University of Oregon have shown at ALS Beamline 12.0.2 that it is possible to form x-ray holograms in reflection geometry by using the light scattered from a sample, opening the door to lensless imaging of a wealth of new material samples.

154

Lensless X-Ray Imaging in Reflection  

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

X-Ray Imaging in Reflection Print X-Ray Imaging in Reflection Print The advent of x-ray free-electron laser (XFEL) light sources has led to an outburst of research activities in the field of lensless imaging. XFELs combine the advantages of sychrotron light sources (high brightness and x-ray wavelengths relevant to atomic and molecular phenomena) with the advantages of visible-light lasers (highly coherent beams). All of these characteristics are important for coherent x-ray diffraction imaging-lensless imaging techniques that are proving to be integral to single-shot, high-resolution imaging of both complex materials and biological samples. Existing techniques are typically designed for transmission geometry, however, and use isolated objects, requiring special sample fabrication and restricting the type of samples under investigation. Recently, researchers from the ALS and the University of Oregon have shown at ALS Beamline 12.0.2 that it is possible to form x-ray holograms in reflection geometry by using the light scattered from a sample, opening the door to lensless imaging of a wealth of new material samples.

155

Lensless X-Ray Imaging in Reflection  

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

X-Ray Imaging in Reflection Print X-Ray Imaging in Reflection Print The advent of x-ray free-electron laser (XFEL) light sources has led to an outburst of research activities in the field of lensless imaging. XFELs combine the advantages of sychrotron light sources (high brightness and x-ray wavelengths relevant to atomic and molecular phenomena) with the advantages of visible-light lasers (highly coherent beams). All of these characteristics are important for coherent x-ray diffraction imaging-lensless imaging techniques that are proving to be integral to single-shot, high-resolution imaging of both complex materials and biological samples. Existing techniques are typically designed for transmission geometry, however, and use isolated objects, requiring special sample fabrication and restricting the type of samples under investigation. Recently, researchers from the ALS and the University of Oregon have shown at ALS Beamline 12.0.2 that it is possible to form x-ray holograms in reflection geometry by using the light scattered from a sample, opening the door to lensless imaging of a wealth of new material samples.

156

Lensless X-Ray Imaging in Reflection  

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

Lensless X-Ray Imaging in Reflection Print Lensless X-Ray Imaging in Reflection Print The advent of x-ray free-electron laser (XFEL) light sources has led to an outburst of research activities in the field of lensless imaging. XFELs combine the advantages of sychrotron light sources (high brightness and x-ray wavelengths relevant to atomic and molecular phenomena) with the advantages of visible-light lasers (highly coherent beams). All of these characteristics are important for coherent x-ray diffraction imaging-lensless imaging techniques that are proving to be integral to single-shot, high-resolution imaging of both complex materials and biological samples. Existing techniques are typically designed for transmission geometry, however, and use isolated objects, requiring special sample fabrication and restricting the type of samples under investigation. Recently, researchers from the ALS and the University of Oregon have shown at ALS Beamline 12.0.2 that it is possible to form x-ray holograms in reflection geometry by using the light scattered from a sample, opening the door to lensless imaging of a wealth of new material samples.

157

Lensless X-Ray Imaging in Reflection  

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

Lensless X-Ray Imaging in Reflection Print Lensless X-Ray Imaging in Reflection Print The advent of x-ray free-electron laser (XFEL) light sources has led to an outburst of research activities in the field of lensless imaging. XFELs combine the advantages of sychrotron light sources (high brightness and x-ray wavelengths relevant to atomic and molecular phenomena) with the advantages of visible-light lasers (highly coherent beams). All of these characteristics are important for coherent x-ray diffraction imaging-lensless imaging techniques that are proving to be integral to single-shot, high-resolution imaging of both complex materials and biological samples. Existing techniques are typically designed for transmission geometry, however, and use isolated objects, requiring special sample fabrication and restricting the type of samples under investigation. Recently, researchers from the ALS and the University of Oregon have shown at ALS Beamline 12.0.2 that it is possible to form x-ray holograms in reflection geometry by using the light scattered from a sample, opening the door to lensless imaging of a wealth of new material samples.

158

Photodetachment of H$^{-}$ near a partial reflecting surface  

E-Print Network [OSTI]

Theoretical and interpretative study on the subject of photodetachment of H$^{-}$ near a partial reflecting surface is presented, and the absorption effect of the surface is investigated on the total and differential cross sections using a theoretical imaging method. To understand the absorption effect, a reflection parameter $K$ is introduced as a multiplicative factor to the outgoing detached-electron wave of H$^-$ propagating toward the wall. The reflection parameter measures, how much electron wave would reflect from the surface; K=0 corresponds to no reflection and K=1 corresponds to the total reflection.

A. Afaq

2007-05-10T23:59:59.000Z

159

Meta-Sociology: Doings and Reflections  

E-Print Network [OSTI]

and to participate. '. "Lik I have called my remarks "Meta-Sociology: Doings and ReflectIo~s. LI e many of you, I am not quite sure what "meta" means, but, kn?Wlng t~at George Ritzer was going to address ~ relate~ theme, I was depending o~ him to give you the in... undergraduate degree ~~ . How can I make you understand what the first few days and weeks 10 Lawrence meant to me? It was my first time living apart from my family; it was my first museum; my first art. gallery. It was my. first e?'P0sure.to .live classical...

Scott, W. Richard

1991-04-01T23:59:59.000Z

160

Reflective echo tomographic imaging using acoustic beams  

DOE Patents [OSTI]

An inspection system includes a plurality of acoustic beamformers, where each of the plurality of acoustic beamformers including a plurality of acoustic transmitter elements. The system also includes at least one controller configured for causing each of the plurality of acoustic beamformers to generate an acoustic beam directed to a point in a volume of interest during a first time. Based on a reflected wave intensity detected at a plurality of acoustic receiver elements, an image of the volume of interest can be generated.

Kisner, Roger; Santos-Villalobos, Hector J

2014-11-25T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Reflectivity of Shock Compressed Xenon Plasma  

E-Print Network [OSTI]

Experimental results for the reflection coefficient of shock-compressed dense Xenon plasmas at pressures of 1.6 - 17 GPa and temperatures around 30 000 K using a laser beam with \\lambda = 1.06 10^-6 m are compared with calculations based on different theoretical approaches to the dynamical collision frequency. It is found that a reasonable description can be given assuming a spatial electron density profile corresponding to a finite width of the shock wave front of about $2 10^-6 m.

Reinholz, H; Wierling, A; Mintsev, V; Gryaznov, V

2002-01-01T23:59:59.000Z

162

A replaceable reflective film for solar concentrators  

SciTech Connect (OSTI)

The 3M Company manufactures a silvered acrylic film called ECP-305 that is regarded as the preferred reflective film for use on stretched-membrane heliostats. However, ECP-305 will degrade in time, due to both corrosion of the silver layer and delamination at the film's silver-to-acrylic interface, and will eventually need to be replaced. 3M uses a very aggressive adhesive on this film, and once it is laminated, replacement is very difficult. The purpose of this investigation was the development of a replaceable reflector, a reflective film that can be easily removed and replaced. A replaceable reflector was successfully configured by laminating ECP-305 to the top surface of a smooth, dimensionally stable polymer film, with a removable adhesive applied to the underside of the polymer film. Several stages of screening and testing led to the selection of a 0.010-inch thick polycarbonate (GE 8030) as the best polymer film and a medium tack tape (3M Y-9425) was selected as the best removable adhesive. To demonstrate the feasibility of the replaceable reflector concept and to provide a real-time field test, the chosen construction was successfully applied to the 50-m{sup 2} SKI heliostat at the Central Receiver Test Facility at Sandia National Laboratories in Albuquerque. 4 refs., 13 figs., 7 tabs.

Not Available

1991-09-01T23:59:59.000Z

163

Computational 3D and reflectivity imaging with high photon efficiency  

E-Print Network [OSTI]

Imaging the 3D structure and reflectivity of a scene can be done using photon-counting detectors. Traditional imagers of this type typically require hundreds of detected photons per pixel for accurate 3D and reflectivity ...

Shin, Dongeek

2014-01-01T23:59:59.000Z

164

The effect of rock density in synthesizing seismic reflection records  

E-Print Network [OSTI]

was gained on the relative significance of rock densities in determining the reflection coefficient. The error which would be expected in the reflection coefficient at an interface when computed from the velocity inforsmtion only can be estimated from... was gained on the relative significance of rock densities in determining the reflection coefficient. The error which would be expected in the reflection coefficient at an interface when computed from the velocity inforsmtion only can be estimated from...

Morris, Gerald Brooks

2012-06-07T23:59:59.000Z

165

Camera-based reflectivity measurement for solar thermal applications  

E-Print Network [OSTI]

Tubular receivers for solar thermal power plants, specifically tower plants, are in common use, in plantsCamera-based reflectivity measurement for solar thermal applications John D. Pye1 , Clifford K. Ho2 of the solar-weighted reflectivity of the receiver component in CSP systems. Such reflectivity measurement

166

Multispectral Imaging At Teels Marsh Area (Shevenell, Et Al., 2008) | Open  

Open Energy Info (EERE)

Teels Marsh Area (Shevenell, Et Al., 2008) Teels Marsh Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Multispectral Imaging At Teels Marsh Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Teels Marsh Area Exploration Technique Multispectral Imaging Activity Date Usefulness useful DOE-funding Unknown Notes Kratt et al. (2006) demonstrate the effectiveness of using a field-portable ASD Fieldspec spectroradiometer and satellite-based Advanced Spaceborne Thermal and emitted Reflectance Radiometer (ASTER) imagery for mapping borate minerals in the field. Borate crusts that were partially mined during the 1800s were identified and mapped at Rhodes, Teels, and Columbus Marshes (playas), all in western Nevada (Figure 1).

167

Multispectral Imaging At Columbus Salt Marsh Area (Shevenell, Et Al., 2008)  

Open Energy Info (EERE)

Marsh Area (Shevenell, Et Al., 2008) Marsh Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Multispectral Imaging At Columbus Salt Marsh Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Columbus Salt Marsh Area Exploration Technique Multispectral Imaging Activity Date Usefulness useful DOE-funding Unknown Notes Kratt et al. (2006) demonstrate the effectiveness of using a field-portable ASD Fieldspec spectroradiometer and satellite-based Advanced Spaceborne Thermal and emitted Reflectance Radiometer (ASTER) imagery for mapping borate minerals in the field. Borate crusts that were partially mined during the 1800s were identified and mapped at Rhodes, Teels, and Columbus Marshes (playas), all in western Nevada (Figure 1).

168

Multispectral Imaging At Rhodes Marsh Area (Shevenell, Et Al., 2008) | Open  

Open Energy Info (EERE)

Rhodes Marsh Area (Shevenell, Et Al., 2008) Rhodes Marsh Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Multispectral Imaging At Rhodes Marsh Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Rhodes Marsh Area Exploration Technique Multispectral Imaging Activity Date Usefulness useful DOE-funding Unknown Notes Kratt et al. (2006) demonstrate the effectiveness of using a field-portable ASD Fieldspec spectroradiometer and satellite-based Advanced Spaceborne Thermal and emitted Reflectance Radiometer (ASTER) imagery for mapping borate minerals in the field. Borate crusts that were partially mined during the 1800s were identified and mapped at Rhodes, Teels, and Columbus Marshes (playas), all in western Nevada (Figure 1).

169

Internal Reflection Sensor for the Cone Penetrometer  

SciTech Connect (OSTI)

The objectives of this project are to design, assemble, test, and demonstrate a prototype Internal Reflection Sensor (IRS) for the cone penetrometer. The sensor will ultimately be deployed during site characterization with the goal of providing real-time, in situ detection of NonAqueous Phase Liquids (NAPLs) in the subsurface. In the first phase of this program, we have designed and assembled an IRS module that interfaces directly to a standard cone penetrometer system. Laboratory tests demonstrated that the sensor responds in real-time to a wide variety of free phase NAPLs without interference from natural materials such as water and soil of various types or dissolved contaminants. In a preliminary field test, the sensor was able to locate NAPLs at thin, discrete depths in a soil test pit when deployed with a cone penetrometer. Ruggedness of the device was tested with a series of penetrometer pushes to the depth of refusal at a clean location. There was no visible damage to the sensor and its performance did not change in the course of these experiments. Based on the successes of the Phase I program, it is recommended that the project proceed to full-scale demonstration in Phase II.

Job Bello

1998-05-29T23:59:59.000Z

170

LED structure with enhanced mirror reflectivity  

DOE Patents [OSTI]

Embodiments of the present invention are generally related to LED chips having improved overall emission by reducing the light-absorbing effects of barrier layers adjacent mirror contacts. In one embodiment, a LED chip comprises one or more LEDs, with each LED having an active region, a first contact under the active region having a highly reflective mirror, and a barrier layer adjacent the mirror. The barrier layer is smaller than the mirror such that it does not extend beyond the periphery of the mirror. In another possible embodiment, an insulator is further provided, with the insulator adjacent the barrier layer and adjacent portions of the mirror not contacted by the active region or by the barrier layer. In yet another embodiment, a second contact is provided on the active region. In a further embodiment, the barrier layer is smaller than the mirror such that the periphery of the mirror is at least 40% free of the barrier layer, and the second contact is below the first contact and accessible from the bottom of the chip.

Bergmann, Michael; Donofrio, Matthew; Heikman, Sten; Schneider, Kevin S; Haberern, Kevin W; Edmond, John A

2014-04-01T23:59:59.000Z

171

OPEC 1991 results reflect hard times  

SciTech Connect (OSTI)

This paper reports that low crude oil prices and economic tough times in industrial countries cause a lean 1991 for members of the Organization of Petroleum Exporting Countries. OPEC's 1991 annual report the member countries reported an overall loss of $12 billion in 1991 on oil revenues that fell 16.2%. Iraq and Kuwait were not included because of their unusual circumstances in the wake of the Persian Gulf war. Reduced oil revenues reflected a slide to $18.66/bbl in 1991 from $22.26/bbl in 1990 for the average price of OPEC basket crudes. As of last June 5 OPEC's basket crude price has averaged only $17.42/bbl this year, OPEC News Agency (Opecna) reported. First quarter 1992 prices averaged $16.77/bbl, compared wit $19.31/bbl in fourth quarter 1991. The average price jumped 52 cent/bbl the first week in June this year to $19.93/bbl, bouyed by Saudi Arabia's move at the end of May to shift its policy from price moderation to one in favor of higher prices, Opecna the. OPEC members increased production 1% in 1991 to an average 23.28 million b/d in spite of negligible production from Iraq and Kuwait and reduced production from Qatar.

Not Available

1992-07-20T23:59:59.000Z

172

Phenology, nutrient composition, digestibility and utilization of heath aster (Aster ericoides L.  

E-Print Network [OSTI]

and then appeared to remain relatively constant for the remainder of tne study. The in vitro coefficients of digestion (COD) varied from Sl%%d to 73%%d in leaves, and 60% to 25% in stems. Percentages of ash ranged from 8. 7% to 13. 5%%d in leaves and 2. 4% to ll...

Kallah, Muhammad Sani

1973-01-01T23:59:59.000Z

173

Pure nuclear reflections in case of nuclear level crossing  

Science Journals Connector (OSTI)

Measurements of the time-differential decay of the collective nuclear excitation in yttrium iron garnet have been performed to observe the (002) pure nuclear reflection versus the splitting within two d sites. Even when the energy levels of the two sites are identical, the reflectivity amplitude does not vanish. This is a new realization of a pure nuclear reflection. It arises in case of nuclear level crossing of two d sites because their eigenvectors are not identical.

R. Rüffer; E. Gerdau; H. D. Rüter; W. Sturhahn; R. Hollatz; A. Schneider

1989-12-11T23:59:59.000Z

174

Reflection and transmission coefficients of a fracture in transversely ...  

E-Print Network [OSTI]

The reflection-transmission problem in isotropic media has been solved by ...... material or abrupt changes in COF (Smith, 1996; Anandakrishnan, 1996; Horgan

2011-11-28T23:59:59.000Z

175

Fabrication and performance of polymer-nanocomposite anti-reflective...  

Office of Scientific and Technical Information (OSTI)

News, VA (United States) Design of polymer anti-reflective (AR) optical coatings for plastic substrates is challenging because polymers exhibit a relatively narrow range of...

176

Reflection Survey At Under Steamboat Springs Area (Warpinski...  

Open Energy Info (EERE)

Under Steamboat Springs Area (Warpinski, Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Under Steamboat...

177

Reflection Survey At Blue Mountain Geothermal Area (Melosh, Et...  

Open Energy Info (EERE)

Melosh, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Blue Mountain Geothermal Area (Melosh, Et Al., 2010)...

178

The important effect of electron reflection on thermionic converter performance  

SciTech Connect (OSTI)

Although only a few percent of high energy electrons are reflected from bare metal surfaces, 20--60% of low energy incident electrons are reflected from thermionic converter electrodes with adsorbed cesium and oxygen. The TECMDL computer model indicates that electron reflection in cesium vapor thermionic converters increases the arc potential drop, offsetting the gain in performance obtainable by lowering the collector work function via the coadsorbed Cs/O layer. The possible suppression of electron reflection by using electrodes with sub-micron surface structure is hypothesized and supported by experimental data obtained by employing a new method for testing in cesium-oxygen vapor.

Rasor, N.S.

1998-07-01T23:59:59.000Z

179

Abstract--In electrically substituted radiometers, the ultra low noise control of the temperature is required. In this framework, we present results dedicated to the temperature regulation of copper plates, 3 cm diameter and 1 mm thick, using YBa2Cu3O7-d  

E-Print Network [OSTI]

Abstract--In electrically substituted radiometers, the ultra low noise control of the temperature wide band absolute thermometers, with mK accuracy, also needs very efficient but convenient control of the sample holder. A temperature resolution well below the mK has to be reached in that case. We present here

Paris-Sud XI, Université de

180

Reflections on Money and Lean Construction Proceedings IGLC-7 253  

E-Print Network [OSTI]

Reflections on Money and Lean Construction Proceedings IGLC-7 253 REFLECTIONS ON MONEY AND LEAN CONSTRUCTION Federico Orrechia1 and Gregory A. Howell2 ABSTRACT Money is a particularly tricky resource to minimize risk of schedule overrun. Here again the role of money is to help clarify value for the client

Tommelein, Iris D.

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


181

Interactive Refractions with Total Internal Reflection Scott T Davis  

E-Print Network [OSTI]

more e-mail: scott-davis-1@uiowa.edu e-mail:cwyman@cs.uiowa.edu efficient such as is the caseInteractive Refractions with Total Internal Reflection Scott T Davis University of Iowa Chris Wyman and improve upon approaches that avoid to- tal internal reflection. CR Categories: I.3.7 [Computer Graphics

Wyman, Chris

182

Reflection soft X-ray microscope and method  

DOE Patents [OSTI]

A reflection soft X-ray microscope is provided by generating soft X-ray beams, condensing the X-ray beams to strike a surface of an object at a predetermined angle, and focusing the X-ray beams reflected from the surface onto a detector, for recording an image of the surface or near surface features of the object under observation.

Suckewer, Szymon (Princeton, NJ); Skinner, Charles H. (Lawrenceville, NJ); Rosser, Roy (Princeton, NJ)

1993-01-01T23:59:59.000Z

183

Laser beam reflection from shock waves in xenon and silicon  

Science Journals Connector (OSTI)

The experimental results of the laser beam (?=1 06 ?m) reflection from shock waves in xenon at P=1 6+17 GPa and in silicon at an insulator?metal transition region at P=10+46 GPa are presented. Reflection characteristics and possibility of the estimation of the electron properties of the substance under high pressures are discussed.

V. B. Mintsev; Yu. B. Zaporoghets; V. E. Fortov

1990-01-01T23:59:59.000Z

184

High-calcium, high-reflectance limestone resources of Illinois  

Science Journals Connector (OSTI)

...measurements were made using a Photovolt Corporat ion reflectance spectrophotometer complying with ASTM Standard E-97 and TAPPI tentative stan- d a r d T 6 4 6 M - 5 4 . E a c h s a m p l e f o r reflectance measurement was pressed into a briquet, using...

185

Reflection Survey At Coso Geothermal Area (2008) | Open Energy Information  

Open Energy Info (EERE)

At Coso Geothermal Area (2008) At Coso Geothermal Area (2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Coso Geothermal Area (2008) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Reflection Survey Activity Date 2008 Usefulness not indicated DOE-funding Unknown Exploration Basis A reflection survey was done to analyze the brittle upper plate structure revealed by reflection seismic data Notes The relationships between upper crustal faults, the brittle-ductile transition zone, and underlying magmatic features imaged by multifold seismic reflection data are consistent with the hypothesis that the Coso geothermal field, which lies within an extensional step-over between dextral faults, is a young, actively developing metamorphic core complex.

186

Seismic Reflection Data and Conceptual Models for Geothermal Development in  

Open Energy Info (EERE)

Seismic Reflection Data and Conceptual Models for Geothermal Development in Seismic Reflection Data and Conceptual Models for Geothermal Development in Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Seismic Reflection Data and Conceptual Models for Geothermal Development in Nevada Abstract Seismic reflection data were collected in two geothermalareas in Nevada to support geologic structural models andgeothermal well targeting. The data were integrated withsurface mapping, well results, and other geophysical data inconceptual geologic models in both areas. Faults wereinterpreted from reflection data based on reflector offsetsand apparent fault surface reflectors dipping away from therange front. Interpreted faults at Blue Mt., where severalwells have been drilled, correlated with well entries.Subsequent well targeting based on the conceptualstructural model

187

Reflection Survey At Coso Geothermal Area (1989) | Open Energy Information  

Open Energy Info (EERE)

Reflection Survey At Coso Geothermal Area (1989) Reflection Survey At Coso Geothermal Area (1989) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Coso Geothermal Area (1989) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Reflection Survey Activity Date 1989 Usefulness useful DOE-funding Unknown Exploration Basis Determine the crustul structure of the Coso geothermal system Notes In mid-1989 the authors designed and collected four seismic reflection/refraction profiles that addressed the crustal structure of the Coso geothermal field. The two main east-west and north-south profiles crossed at the southeastern most base of Sugar Loaf Mountain. Both in-line and cross-line Vibroseis and explosion data were recorded on each of these

188

Metal reflectivity under high?intensity optical radiation  

Science Journals Connector (OSTI)

Single high?intensity (106?109 W/cm2) pulses of 1.06?? radiation emitted from a Q?switched Nd : YAG laser have been used to study reflectivity behavior of single?crystal copper and tantalum samples. Metalreflectivity during irradiation undergoes a significant drop to values much lower than can be attributed to high?temperature effects. This reflectivity drop under high radiation intensity has two characteristic features. First if vaporization is avoided then during the rising portion of the laser pulse the reflectivity drops continuously until it reaches a constant low value. For copper this occurs at an intensity of 3×108 W/cm2 and has a reflectivity value of ?0.64. The corresponding values for tantalum are I?2.5×107 W/cm2 and R?0.41. For still higher intensities a further drop in reflectivity beyond the plateau region is observed. This drop in reflectivity is always accompanied by heavy melting and followed by some vaporization. As suggested by Prokhorov e t a l. this further drop in reflectivity could be associated with dielectriclike behavior of the molten zone.

T. E. Zavecz; M. A. Saifi; M. Notis

1975-01-01T23:59:59.000Z

189

Reflective optical imaging system for extreme ultraviolet wavelengths  

SciTech Connect (OSTI)

This invention is comprised of a projection reflection optical system having two mirrors in a coaxial, four reflection configuration to reproduce the image of an object. The mirrors have aspherical reflection surfaces to provide a very high resolution of object feature wavelengths less than 200 {mu}m, and preferably less than 100 {mu}m. An image resolution of features less than 0.05--0.1 {mu}m, is obtained over a large area field; i.e., 25.4 mm {times} 25.4 mm, with a distortion less than 0.1 of the resolution over the image field.

Viswanathan, V.K.; Newnam, B.E.

1991-12-31T23:59:59.000Z

190

High-frequency nonreciprocal reflection from magnetic films with overlayers  

SciTech Connect (OSTI)

We perform a theoretical study of the nonreciprocal reflection of high-frequency microwave radiation from ferromagnetic films with thin overlayers. Reflection from metallic ferromagnetic films is always near unity and shows no nonreciprocity. In contrast, reflection from a structure which has a dielectric overlayer on top of a film composed of insulated ferromagnetic nanoparticles or nanostructures can show significant nonreciprocity in the 75–80?GHz frequency range, a very high value. This can be important for devices such as isolators or circulators.

Wang, Ying; Nie, Yan; Camley, R. E. [Center for Magnetism and Magnetic Nanostructures, University of Colorado at Colorado Springs, Colorado Springs, Colorado 80918 (United States)

2013-11-14T23:59:59.000Z

191

Reduction of Glass Surface Reflectance by Ion Beam Surface Modification  

SciTech Connect (OSTI)

This is the final report for DOE contract DE-EE0000590. The purpose of this work was to determine the feasibility of the reduction of the reflection from the front of solar photovoltaic modules. Reflection accounts for a power loss of approximately 4%. A solar module having an area of one square meter with an energy conversion efficiency of 18% generates approximately 180 watts. If reflection loss can be eliminated, the power output can be increased to 187 watts. Since conventional thin-film anti-reflection coatings do not have sufficient environmental stability, we investigated the feasibility of ion beam modification of the glass surface to obtain reduction of reflectance. Our findings are generally applicable to all solar modules that use glass encapsulation, as well as commercial float glass used in windows and other applications. Ion implantation of argon, fluorine, and xenon into commercial low-iron soda lime float glass, standard float glass, and borosilicate glass was studied by implantation, annealing, and measurement of reflectance. The three ions all affected reflectance. The most significant change was obtained by argon implantation into both low-iron and standard soda-lime glass. In this way samples were formed with reflectance lower than can be obtained with a single-layer coatings of magnesium fluoride. Integrated reflectance was reduced from 4% to 1% in low-iron soda lime glass typical of the glass used in solar modules. The reduction of reflectance of borosilicate glass was not as large; however borosilicate glass is not typically used in flat plate solar modules. Unlike conventional semiconductor ion implantation doping, glass reflectance reduction was found to be tolerant to large variations in implant dose, meaning that the process does not require high dopant uniformity. Additionally, glass implantation does not require mass analysis. Simple, high current ion implantation equipment can be developed for this process; however, before the process can be employed on full scale solar modules, equipment must be developed for ion implanting large sheets of glass. A cost analysis shows that the process can be economical. Our finding is that the reduction of reflectance by ion beam surface modification is technically and economically feasible. The public will benefit directly from this work by the improvement of photovoltaic module efficiency, and indirectly by the greater understanding of the modification of glass surfaces by ion beams.

Mark Spitzer

2011-03-11T23:59:59.000Z

192

Design of reflective phase compensator filters for telecommunications  

Science Journals Connector (OSTI)

Reflective phase compensator (RPC) filters provide a solution to the phase-dispersion problem of narrow bandpass (NBP) filters when the data rate is 40 Gbits/s or greater. By use of an...

Noe, Tony D

2002-01-01T23:59:59.000Z

193

Stuttering as Reflected in Adults’ Self-Figure Drawings  

Science Journals Connector (OSTI)

This pilot study aimed to detect indicators within self-figure drawings that reflect stuttering in adults. A sample of 20 adults who stutter from childhood were given a blank sheet...n...= 20). Indicators include...

Rachel Lev-Wiesel; Ayala Shabat; Ayala Tsur

2005-03-01T23:59:59.000Z

194

EUV mask reflectivity measurements with micro-scale spatial resolution  

SciTech Connect (OSTI)

The effort to produce defect-free mask blanks for EUV lithography relies on increasing the detection sensitivity of advanced mask inspection tools, operating at several wavelengths. They describe the unique measurement capabilities of a prototype actinic (EUV) wavelength microscope that is capable of detecting small defects and reflectivity changes that occur on the scale of microns to nanometers. The defects present in EUV masks can appear in many well-known forms: as particles that cause amplitude or phase variations in the reflected field; as surface contamination that reduces reflectivity and contrast; and as damage from inspection and use that reduces the reflectivity of the multilayer coating. This paper presents an overview of several topics where scanning actinic inspection makes a unique contribution to EUVL research. They describe the role of actinic scanning inspection in defect repair studies, observations of laser damage, actinic inspection following scanning electron microscopy, and the detection of both native and programmed defects.

Goldberg, Kenneth A.; Rekawa, Senajith B.; Kemp, Charles D.; Barty, Anton; Anderson, Erik; Kearney, Patrick; Han, Hakseung

2008-02-01T23:59:59.000Z

195

Reflective Interfaces : assisting teens with stressful situations online  

E-Print Network [OSTI]

This thesis presents the concept of Reflective Interfaces, a novel approach to user experience design that promotes positive behavioral norms. Traditional interface design methodologies such as User Centered Design are ...

Jones, Birago (Birago Korayga)

2012-01-01T23:59:59.000Z

196

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS, II  

E-Print Network [OSTI]

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS, II University of Tokyo Noda, Chiba 278-8510, Japan Abstract. Green functions and Hall-Littlewoo* *d functions associated to W are introduced, and Green functions are described

Shoj, Toshiaki

197

Anti-reflective nanoporous silicon for efficient hydrogen production  

DOE Patents [OSTI]

Exemplary embodiments are disclosed of anti-reflective nanoporous silicon for efficient hydrogen production by photoelectrolysis of water. A nanoporous black Si is disclosed as an efficient photocathode for H.sub.2 production from water splitting half-reaction.

Oh, Jihun; Branz, Howard M

2014-05-20T23:59:59.000Z

198

Amplified total internal reflection: theory, analysis, and demonstration of  

E-Print Network [OSTI]

and links 1. C. J. Koester, "Laser action by enhanced total internal reflection," IEEE J. Quantum Electron optical waveguide with lossless core and gainy cladding will experience growth [1]. Consider instead

Hagness, Susan C.

199

Quantum field theoretical description for the reflectivity of graphene  

E-Print Network [OSTI]

We derive the polarization tensor of graphene at nonzero temperature in (2+1)-dimensional space-time. The obtained tensor coincides with the previously known one at all Matsubara frequencies, but, in contrast to it, admits analytic continuation to the real frequency axis satisfying all physical requirements. Using the obtained representation for the polarization tensor, we develope quantum field theoretical description for the reflectivity of graphene. The analytic asymptotic expressions for the reflection coefficients and reflectivities at low and high frequencies are derived for both independent polarizations of the electromagnetic field. The dependencies of reflectivities on the frequency and angle of incidence are investigated. Numerical computations using the exact expressions for the polarization tensor are performed and application regions for the analytic asymptotic results are determined.

Bordag, M; Mostepanenko, V M; Petrov, V M

2015-01-01T23:59:59.000Z

200

Reflective cracking of shear keys in multi-beam bridges  

E-Print Network [OSTI]

strength to resist cracking from vehicular loads, but uneven temperature changes and shrinkage strains cause high tensile stresses in the shear key regions and lead to reflective cracking. The analyses showed the highest stresses were often times near...

Sharpe, Graeme Peter

2009-06-02T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Universal signal processing method for multimode reflective sensors  

E-Print Network [OSTI]

sensitivity, but the sensor configuration is complicated and requires the use of expensive lasers and single mode fibers. Amplitude modulation trades sensitivity for low cost and ease of configuration by using light emitting diodes and multimode fibers. A... method for reflective sensors using optical fibers as the data transmission media. The proposed transmitter - receiver unit was based on the amplitude modulation of reflected optical signals. This involves the use of an light emitting diode (LED...

Larson, Robert Eugene

2012-06-07T23:59:59.000Z

202

Multilayer reflective coatings for extreme-ultraviolet lithography  

SciTech Connect (OSTI)

Multilayer mirror coatings which reflect extreme ultraviolet (EUV) radiation are a key enabling technology for EUV lithography. Mo/Si multilayers with reflectances of 67.5% at 13.4 nm are now routinely achieved and reflectances of 70 2% at 11.4 nm were obtained with MO/Be multilayers. High reflectance is achieved with careful control of substrate quality, layer thicknesses, multilayer materials, interface quality, and surface termination. Reflectance and film stress were found to be stable relative to the requirements for application to EUV lithography. The run-to-run reproducibility of the reflectance peak position was characterized to be better than 0.2%, providing the required wavelength matching among the seven multilayer-coated mirrors used in the present lithography system design. Uniformity of coating was improved to better than 0.5% across 150 mm diameter substrates. These improvements in EUV multilayer mirror technology will enable us to meet the stringent specifications for coating the large optical substrates for our next-generation EUV lithography system.

Montcalm, C., LLNL

1998-03-10T23:59:59.000Z

203

Boosting the performance of the ASTRI SST-2M prototype: reflective and anti-reflective coatings  

E-Print Network [OSTI]

ASTRI is a Flagship Project of the Italian Ministry of Education, University and Research, led by the Italian National Institute of Astrophysics, INAF. One of the main aims of the ASTRI Project is the design, construction and verification on-field of a dual mirror (2M) end-to-end prototype for the Small Size Telescope (SST) envisaged to become part of the Cherenkov Telescope Array. The ASTRI SST-2M prototype adopts the Schwarzschild-Couder design, and a camera based on SiPM (Silicon Photo Multiplier); it will be assembled at the INAF astronomical site of Serra La Nave on mount Etna (Catania, Italy) within mid 2014, and will start scientific validation phase soon after. The peculiarities of the optical design and of the SiPM bandpass pushed towards specifically optimized choices in terms of reflective coatings for both the primary and the secondary mirror. In particular, multi-layer dielectric coatings, capable of filtering out the large Night Sky Background contamination at wavelengths $\\lambda \\gtrsim 700$ n...

Perri, Luca

2013-01-01T23:59:59.000Z

204

MTI Ground Truth Collection Ivanpah Dry Lake Bed, California, May, July, and August 2002  

SciTech Connect (OSTI)

A multi-agency collaboration successfully completed a series of ground truth measurements at the Ivanpah Dry Lake bed during FY 2002. Four collection attempts were made: two in May, one in July, and one in August. The objective was to collect ground-based measurements and airborne data during Multispectral Thermal Imager satellite overpasses. The measurements were to aid in the calibration of the satellite data and in algorithm validation. The Remote Sensing Laboratory, Las Vegas, Nevada; the National Aeronautics and Space Administration; Los Alamos National Laboratory; and the University of Arizona participated in the effort. Field instrumentation included a sun photometer on loan from the University of Arizona and the Remote Sensing Laboratory's radiosonde weather balloon, weather station, thermal infrared radiometers, and spectral radiometer. In addition, three reflectance panels were deployed; certain tests used water baths set at two different temperatures. Local weather data as well as sky photography were collected. May presented several excellent days; however, it was later learned that tasking for the satellite was not available. A combination of cloud cover, wind, and dusty conditions limited useful data collections to two days, August 28 and 29. Despite less-than- ideal weather conditions, the data for the Multispectral Thermal Imager calibration were obtained. A unique set of circumstances also allowed data collection during overpasses of the LANDSAT7 and ASTER satellites.

David L. Hawley

2002-10-01T23:59:59.000Z

205

X-ray Reflection By Photoionized Accretion Discs  

E-Print Network [OSTI]

We present the results of reflection calculations that treat the relevant physics with a minimum of assumptions. The temperature and ionization structure of the top five Thomson depths of an illuminated disc are calculated while also demanding that the atmosphere is in hydrostatic equilibrium. In agreement with Nayakshin, Kazanas & Kallman, we find that there is a rapid transition from hot to cold material in the illuminated layer. However, the transition is usually not sharp so that often we find a small but finite region in Thomson depth where there is a stable temperature zone at T \\sim 2 x 10^{6} K due to photoelectric heating from recombining ions. As a result, the reflection spectra often exhibit strong features from partially-ionized material, including helium-like Fe K lines and edges. We find that due to the highly ionized features in the spectra these models have difficulty correctly parameterizing the new reflection spectra. There is evidence for a spurious $R-\\Gamma$ correlation in the ASCA energy range, where $R$ is the reflection fraction for a power-law continuum of index $\\Gamma$, confirming the suggestion of Done & Nayakshin that at least part of the R-Gamma correlation reported by Zdziarski, Lubinski & Smith for Seyfert galaxies and X-ray binaries might be due to ionization effects. Although many of the reflection spectra show strong ionized features, these are not typically observed in most Seyfert and quasar X-ray spectra.

D. R. Ballantyne; R. R. Ross; A. C. Fabian

2001-02-02T23:59:59.000Z

206

Computer assisted design reflection : a web application to improve early stage product in startup companies  

E-Print Network [OSTI]

This thesis investigates the concept of computer-assisted design reflection. The work details the development of a prototype framework and reflection engine. Reflection is a critical process in design. It allows a designer ...

Gimenez, Clayton C. (Clayton Christopher)

2014-01-01T23:59:59.000Z

207

Reflection Survey At Yellowstone Region (Morgan, Et Al., 2003) | Open  

Open Energy Info (EERE)

Yellowstone Region (Morgan, Et Al., 2003) Yellowstone Region (Morgan, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Yellowstone Region (Morgan, Et Al., 2003) Exploration Activity Details Location Yellowstone Caldera Geothermal Region Exploration Technique Reflection Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes Simultan eously, we surveyed over 2500 linear km with high-resolution seismic reflection profling that penetrated the upper ~25 m of the lake bottom. References L. A. Morgan, W. C. Shanks, D. A. Lovalvo, S. Y. Johnson, W. J. Stephenson, K. L. Pierce, S. S. Harlan, C. A. Finn, G. Lee, M. Webring, B. Schulze, J. Duhn, R. Sweeney, L. Balistrieri (2003) Exploration And Discovery In Yellowstone Lake- Results From High-Resolution Sonar Imaging,

208

Reflection Survey At Blue Mountain Area (Fairbank Engineering, 2007) | Open  

Open Energy Info (EERE)

Blue Mountain Area (Fairbank Engineering, 2007) Blue Mountain Area (Fairbank Engineering, 2007) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Blue Mountain Area (Fairbank Engineering, 2007) Exploration Activity Details Location Blue Mountain Area Exploration Technique Reflection Survey Activity Date Usefulness useful DOE-funding Unknown Notes A high-resolution seismic reflection survey was conducted by Utah Geophysical, Inc. (1990) along four widely spaced survey lines normal to range front fault sets. The survey was designed primarily to detect silicified zones or zones of argillic alteration, and faulting, to depths of about 300 meters (1000 feet), as part of the precious metals exploration program. One interpretation of the data showed discrete, high-angle faults

209

Simulation of the Reflected Blast Wave froma C-4 Charge  

SciTech Connect (OSTI)

The reflection of a blast wave from a C4 charge detonated above a planar surface is simulated with our ALE3D code. We used a finely-resolved, fixed Eulerian 2-D mesh (167 {micro}m per cell) to capture the detonation of the charge, the blast wave propagation in nitrogen, and its reflection from the surface. The thermodynamic properties of the detonation products and nitrogen were specified by the Cheetah code. A programmed-burn model was used to detonate the charge at a rate based on measured detonation velocities. Computed pressure histories are compared with pressures measured by Kistler 603B piezoelectric gauges at 8 ranges (GR = 0, 2, 4, 8, 10, and 12 inches) along the reflecting surface. Computed and measured waveforms and positive-phase impulses were similar, except at close-in ranges (GR < 2 inches), which were dominated by jetting effects.

Howard, W M; Kuhl, A L; Tringe, J W

2011-08-01T23:59:59.000Z

210

EUV mask reflectivity measurements with micron-scale spatial resolution  

SciTech Connect (OSTI)

The effort to produce defect-free mask blanks for EUV lithography relies on increasing the detection sensitivity of advanced mask inspection tools, operating at several wavelengths. We describe the unique measurement capabilities of a prototype actinic (EUV wavelength) microscope that is capable of detecting small defects and reflectivity changes that occur on the scale of microns to nanometers. Types of defects: (a) Buried Substrate Defects: particles & pits (causes amplitude and/or phase variations); (b) Surface Contamination (reduces reflectivity and (possibly) contrast); (c) Damage from Inspection and Use (reduces the reflectivity of the multilayer coating). This paper presents an overview of several topics where scanning actinic inspection makes a unique contribution to EUVL research. We describe the role of actinic scanning inspection in four cases: defect repair studies; observations of laser damage; after scanning electron microscopy; and native and programmed defects.

Goldberg, Kenneth A.; Rekawa, S.B.; Kemp, C.D.; Barty, A.; Anderson, E.H.; Kearney, Patrick; Han, Hakseung

2008-05-26T23:59:59.000Z

211

Improved Spatial Resolution for Reflection Mode Infrared Microscopy  

SciTech Connect (OSTI)

Standard commercial infrared microscopes operating in reflection mode use a mirror to direct the reflected light from the sample to the detector. This mirror blocks about half of the incident light, however, and thus degrades the spatial resolution by reducing the umerical aperture of the objective. Here, we replace the mirror with a 50% beamsplitter to allow full illumination of the objective and retain a way to direct the reflected light to the detector. The improved spatial resolution is demonstrated using two different microscopes apable of diffraction-limited resolution: the first microscope is coupled to a synchrotron source and utilizes a single point detector, whereas the second microscope has a standard blackbody source and uses a focal planetarray (FPA) detector.

Bechtel, Hans A.; Martin, Michael C.; May, T.E.; Lerch, Philippe

2009-10-09T23:59:59.000Z

212

Multiple X-ray reflection from ionized slabs  

E-Print Network [OSTI]

Multiple reflection of X-rays may be important when an accretion disc and its hot corona have a complicated geometry, or if returning radiation due to gravitational light bending is important, or in emission from a funnel such as proposed in some gamma-ray burst models. We simulate the effects of multiple reflection by modifying the boundary condition for an X-ray illuminated slab. Multiple reflection makes the soft X-ray spectrum steeper (softer) and strengthens broad emission and absorption features, especially the K-shell features of iron. This may be important in explaining the spectra of sources such as the Narrow-Line Seyfert 1 galaxy 1H0707-495.

R. R. Ross; A. C. Fabian; D. R. Ballantyne

2002-06-11T23:59:59.000Z

213

A comprehensive range of X-ray ionized reflection models  

E-Print Network [OSTI]

X-ray ionized reflection occurs when a surface is irradiated with X-rays so intense that its ionization state is determined by the ionization parameter xi propto F/n, where F is the incident flux and n the gas density. It occurs in accretion, onto compact objects including black holes in both active galaxies and stellar-mass binaries, and possibly in gamma-ray bursts. Computation of model reflection spectra is often time-consuming. Here we present the results from a comprehensive grid of models computed with our code, which has now been extended to include what we consider to be all energetically-important ionization states and transitions. This grid is being made available as an ionized-reflection model, REFLION, for XSPEC.

R. R. Ross; A. C. Fabian

2005-01-07T23:59:59.000Z

214

Reflectivity of cholesteric liquid crystals with spatially varying pitch  

E-Print Network [OSTI]

Solids with spatially varying photonic structure offer gaps to light of a wider range of frequencies than do simple photonic systems. We solve numerically the field distribution in a solid cholesteric with a linearly varying inverse pitch (helical wavevector) using equations we derive for the general case. The simple idea that the position where the Bragg condition is locally satisfied is where reflection takes place is only true in part. Here, reflection is due to a region where the waves are forced to become evanescent, and the rate of variation of structure determines over which distance the waves decay and therefore how complete reflection is. The approximate local Bragg-de Vries schemes are shown to break down in detail at the edges of the gap, and an analytical estimate is given for the transmission coefficient.

S. Kutter; M. Warner

2003-04-30T23:59:59.000Z

215

Research Needs: Glass Solar Reflectance and Vinyl Siding  

SciTech Connect (OSTI)

The subject of glass solar reflectance and its contribution to permanent vinyl siding distortion has not been extensively studied, and some phenomena are not yet well understood. This white paper presents what is known regarding the issue and identifies where more research is needed. Three primary topics are discussed: environmental factors that control the transfer of heat to and from the siding surface; vinyl siding properties that may affect heat build-up and permanent distortion; and factors that determine the properties of reflected solar radiation from glass surfaces, including insulating window glass. Further research is needed to fully characterize the conditions associated with siding distortion, the scope of the problem, physical properties of vinyl siding, insulating window glass reflection characteristics, and possible mitigation or prevention strategies.

Hart, Robert; Curcija, Charlie; Arasteh, Dariush; Goudey, Howdy; Kohler, Christian; Selkowitz, Stephen

2011-07-07T23:59:59.000Z

216

Reflection Survey (Deangelo, Et Al., 1999) | Open Energy Information  

Open Energy Info (EERE)

Deangelo, Et Al., 1999) Deangelo, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey (Deangelo, Et Al., 1999) Exploration Activity Details Location Unspecified Exploration Technique Reflection Survey Activity Date Usefulness useful DOE-funding Unknown Notes We believe we have demonstrated two sources that can generate S-waves that are appropriate for evaluating geothermal prospects. The first, a vector-explosive package, has never been available to the seismic industry, and the demonstration of its source pe References M. DeAngelo, B.A. Hardage, J. L. Simmons Jr. (1999) Development Of Active Seismic Vector-Wavefield Imaging Technology For Geothermal Applications Retrieved from "http://en.openei.org/w/index.php?title=Reflection_Survey_(Deangelo,_Et_Al.,_1999)&oldid=388218

217

Measurements of the hard-x-ray reflectivity of iridium  

SciTech Connect (OSTI)

In connection with the design of a hard-x-ray telescope for the Constellation X-Ray Observatory we measured the reflectivity of an iridium-coated zerodur substrate as a function of angle at 55, 60, 70, and 80 keV at the National Synchrotron Light Source of Brookhaven National Laboratory. The optical constants were derived from the reflectivity data. The real component of the index of refraction is in excellent agreement with theoretical values at all four energies. However, the imaginary component, which is related to the mass attenuation coefficient, is 50% to 70% larger at 55, 60, and 70 keV than theoretical values.

Romaine, S.; Bruni, R.; Gorenstein, P.; Zhong, Z

2007-01-10T23:59:59.000Z

218

Ionized Iron Lines in X-ray Reflection Spectra  

E-Print Network [OSTI]

We present results from new calculations of the X-ray reflection spectrum from ionized accretion discs. These computations improve on our previous models by including the condition of hydrostatic balance in the vertical direction, following the work of Nayakshin, Kazanas & Kallman. We find that an ionized Fe K$\\alpha$ line is prominent in the reflection spectra for a wide variety of physical conditions. The results hold for both gas and radiation pressure dominated discs and when the metal abundances have been varied.

D. R. Ballantyne; R. R. Ross; A. C. Fabian

2001-02-15T23:59:59.000Z

219

Folded reflective tandem polymer solar cell doubles efficiency  

Science Journals Connector (OSTI)

Conjugated polymers are promising materials for the production of inexpensive and flexible photovoltaic cells. Organic materials display tunable optical absorption within a large spectral range. This enables the construction of organic tandem photovoltaic cells. The authors here demonstrate a reflective tandem cell where single cells are reflecting the nonabsorbed light upon another adjacent cell. By folding two planar but spectrally different cells toward each other spectral broadening and light trapping are combined to give an enhancement of power conversion efficiency of a factor of 1.8 ± 0.3 .

Kristofer Tvingstedt; Viktor Andersson; Fengling Zhang; Olle Inganäs

2007-01-01T23:59:59.000Z

220

Frequency-dependent reflectivity of shock-compressed xenon plasmas  

Science Journals Connector (OSTI)

Results for the reflection coefficient of shock-compressed dense xenon plasmas at pressures of 1.6–20 GPa and temperatures around 30 000 K using laser beams of wavelengths 1.06 ?m and 0.694 ?m are presented, which indicate metallic behavior at high densities. For the theoretical description of the experiments, a quantum statistical approach to the dielectric function is used. The comparison with molecular dynamics simulations is discussed. We conclude that reflectivity measurements at different wavelengths can provide information about the density profile of the shock wave front.

H. Reinholz, Yu. Zaporoghets, V. Mintsev, V. Fortov, I. Morozov, and G. Röpke

2003-09-26T23:59:59.000Z

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


221

Effect of window reflections on photonic Doppler velocimetry measurements  

SciTech Connect (OSTI)

Photonic Doppler velocimetry (PDV) has rapidly become a standard diagnostic for measuring velocities in dynamic compression research. While free surface velocity measurements are fairly straightforward, complications occur when PDV is used to measure a dynamically loaded sample through a window. Fresnel reflections can severely affect the velocity and time resolution of PDV measurements, especially for low-velocity transients. Shock experiments of quartz compressed between two sapphire plates demonstrate how optical window reflections cause ringing in the extracted PDV velocity profile. Velocity ringing is significantly reduced by using either a wedge window or an antireflective coating.

Ao, T.; Dolan, D. H. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

2011-02-15T23:59:59.000Z

222

Reflection Survey At Rye Patch Area (DOE GTP, 2011) | Open Energy...  

Open Energy Info (EERE)

Reflection Survey At Rye Patch Area (DOE GTP, 2011) Exploration Activity Details Location Rye Patch Area Exploration Technique Reflection Survey Activity Date Usefulness not...

223

Skin cancer detection by oblique-incidence diffuse reflectance spectroscopy  

E-Print Network [OSTI]

Skin cancer is the most common form of cancer and it is on the rise. If skin cancer is diagnosed early enough, the survival rate is close to 90%. Oblique-incidence diffuse reflectance (OIR) spectroscopy offers a technology that may be used...

Smith, Elizabeth Brooks

2009-05-15T23:59:59.000Z

224

Shear-wave crosswell reflection imaging in west Texas  

SciTech Connect (OSTI)

Crosswell reflection imaging was recently introduced as a method for high-resolution (of the order of a few feet) imaging of reservoirs. P-wave imaging was successfully tested on short and intermediate-offset crosswell profiles. Although shear-wave imaging was demonstrated with a short-offset (187 feet) data set, it was generally believed that high-frequency shear imaging at larger interwell distances might not be feasible, because the high-frequency shear waves will suffer large attenuation losses, resulting in poor signal-to-noise ratios for the shear-wave reflections. In this paper the authors present a real-data study, illustrating that shear-wave imaging was feasible at a west Texas carbonate reservoir for an interwell distance of 586 feet. Although the shear direct arrival and reflections are not always evident in the raw gathers processing and stacking enhances them enough to allow imaging of the interwell area for the whole depth range covered by the survey. The results clearly indicate that further work on shear-wave crosswell reflection imaging is warranted.

Lazaratos, S.K.; Marion, B.P. [TomoSeis Inc., Houston, TX (United States); Langan, R. [Chevron Petroleum Technology, La Habra, CA (United States); Harris, J.M. [Stanford Univ., CA (United States)

1994-12-31T23:59:59.000Z

225

Fiber optic hydrophone sensor arrays using low reflectance internal mirrors  

E-Print Network [OSTI]

A new design of fiber optic hydrophone sensor arrays phics. using low reflectance internal mirrors in optical fibers is investigated. The mirrors are produced by fusion arc splicing of two fibers, one of which has a thin film of TiO2 on the end. A...

Lee, Jong-Seo

2012-06-07T23:59:59.000Z

226

Green functions and Macdonald functions associated to complex reflection groups  

E-Print Network [OSTI]

Green functions and Macdonald functions associated to complex reflection groups Toshiaki Shoji Department of Mathematics Science University of Tokyo Noda, Chiba 278­8510, Japan 1. Introduction 1.1. Green functions are introduced by J.A. Green [G] in 1955, in connection with the representation theory of general

Shoj, Toshiaki

227

ON GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS  

E-Print Network [OSTI]

ON GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS TOSHIAKI SHOJI Department of Mathematics Science University of Tokyo Noda, Chiba 278­8510, Japan §1. What are the Green functions Green functions are introduced by J.A. Green[G] in 1955, in connection with the representation theory of general linear groups GL

Shoj, Toshiaki

228

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS, II  

E-Print Network [OSTI]

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS, II TOSHIAKI SHOJI Department of Mathematics Science University of Tokyo Noda, Chiba 278­8510, Japan Abstract. Green functions associated­Littlewood functions associated to W are introduced, and Green functions are described as the transition matrix between

Shoj, Toshiaki

229

ON GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS  

E-Print Network [OSTI]

ON GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS University of Tokyo Noda, Chiba 278-8510, Japan x1. What are the Green functions Green functions are introduced by J.A. Green[G] in 1955, in connection with * *the

Shoj, Toshiaki

230

Seismic reflection analysis of the Manson Impact Structure, Iowa  

E-Print Network [OSTI]

trough diameter of around 21 km, a shallow floor (0.6–0.7 km), and a central uplift that has a minimum diameter of 7.5 km. The two reflection lines are coincidentally located along an east-west radial transect and are constrained by shallow drill...

Keiswetter, Dean; Black, Ross A.; Steeples, Don W.

1996-03-10T23:59:59.000Z

231

Reflecting Back, or What Can the French Tell  

E-Print Network [OSTI]

' or `relief' theories.3 The French word humour is used occasionally in this broad sense (particularly92 Reflecting Back, or What Can the French Tell The English About Humour? WILL NOONAN L-mère. (English humour highlights with bitterness and despair the absurdity of the world. French humour makes fun

Paris-Sud XI, Université de

232

Beilstein-Institut Reflections on Energy Conversion in  

E-Print Network [OSTI]

Beilstein-Institut Reflections on Energy Conversion in Biological and Biomimetic Systems Athel by conversion of the heat into work, chemical energy or electrical power, and the inevitable energy losses 2011 Abstract In principle any form of energy (light, electrical, potential, chemical, kinetic energy

233

Toward Infusing Modular and Reflective Design Learning throughout the Curriculum  

E-Print Network [OSTI]

Toward Infusing Modular and Reflective Design Learning throughout the Curriculum John C. Georgas intervention that cen- ters on the widespread infusion of design learning throughout the curriculum using: An emphasis on broadly infusing design learning through the curriculum using modular design challenges

Georgas, John

234

A 16-ELEMENT REFLECTION GRID AMPLIFIER Frederic Lecuyer1  

E-Print Network [OSTI]

, which can double as a large metal heat sink. Otherwise, the operation of reflection grid amplifiers to improve common- Mirror/Heat Sink Active GridInput Polarizer Active Grid Output Polarizer E Output Beam E Input Beam E Output Beam Differential Transistor Pair E Input Beam Mirror/Heat Sink Active Grid

235

The Reflection pattern in the immune system Junichi Suzuki  

E-Print Network [OSTI]

, Graduate School of Science and Technology, Keio University Yokohama, 223­8522, Japan +81­45­563­3925 suzuki University Yokohama, 223­8522, Japan +81­45­563­3925 yama@cs.keio.ac.jp Abstract Reflection is a design and household example and an example in the immune system. We believe our work helps understand the intent

Suzuki, Jun

236

Comment on the question of reflection asymmetry in Pa229  

Science Journals Connector (OSTI)

The alpha decay hindrance factors from the Pa229 5/2+ ground state to the 5/2± parity doublet bands in Ac225 suggest strong reflection asymmetry in Pa229 and the expectation that a 5/2± parity doublet will be found in this nucleus.

Raymond K. Sheline

1993-09-01T23:59:59.000Z

237

A New Method for Simultaneous Measurement of the Integrated Reflectivity of Crystals at Multiple Orders of Reflection and Comparison with New Theoretical Calculations  

SciTech Connect (OSTI)

This paper describes a new method for the simultaneous measurement of the integrated reflectivity of a crystal for multiple orders of reflection at a predefined Bragg angle. The technique is demonstrated with a mica crystal for Bragg angles of 43{sup o}, 47{sup o}, and 50{sup o}. The measured integrated reflectivity for Bragg reflections up to the 24th order is compared with new theoretical predictions, which are also presented in this paper.

S.G. Lee; J.G. Bak; Y.S. Jung; M. Bitter; K.W. Hill; G. Hoelzer; O. Wehrhan; E. Foerster

2003-04-09T23:59:59.000Z

238

The reflective lens : the effects of video analysis on preservice teacher development  

E-Print Network [OSTI]

reflections. Wisconsin. Danielewicz, J. , & NetLibrary2002; Clark, 2001; Danielewicz & NetLibrary Inc. , 2001;

Halter, Christopher P.

2006-01-01T23:59:59.000Z

239

U-043: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote  

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

3: Attachmate Reflection Buffer Overflow in FTP Client Lets 3: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote Servers Execute Arbitrary Code U-043: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote Servers Execute Arbitrary Code November 22, 2011 - 8:00am Addthis PROBLEM: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote Servers Execute Arbitrary Code. PLATFORM: 14.1.1173 and prior versions The following product versions are affected: Reflection for HP version 14.x Reflection for UNIX and OpenVMS version 14.x Reflection for ReGIS Graphics version 14.x Reflection for IBM version 14.x Reflection X version 14.x ABSTRACT: A remote server can execute arbitrary code on the connected target system. reference LINKS: Security Updates and Reflection Attachmate Support Lifecycle Attachmate Downloads

240

U-043: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote  

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

3: Attachmate Reflection Buffer Overflow in FTP Client Lets 3: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote Servers Execute Arbitrary Code U-043: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote Servers Execute Arbitrary Code November 22, 2011 - 8:00am Addthis PROBLEM: Attachmate Reflection Buffer Overflow in FTP Client Lets Remote Servers Execute Arbitrary Code. PLATFORM: 14.1.1173 and prior versions The following product versions are affected: Reflection for HP version 14.x Reflection for UNIX and OpenVMS version 14.x Reflection for ReGIS Graphics version 14.x Reflection for IBM version 14.x Reflection X version 14.x ABSTRACT: A remote server can execute arbitrary code on the connected target system. reference LINKS: Security Updates and Reflection Attachmate Support Lifecycle Attachmate Downloads

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Time Correlations in Backscattering Radar Reflectivity Measurements from Cirrus Clouds  

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

Time Correlations in Backscattering Radar Reflectivity Time Correlations in Backscattering Radar Reflectivity Measurements from Cirrus Clouds K. Ivanova, H. N. Shirer, and E. E. Clothiaux Pennsylvania State University University Park, Pennsylvania T. P. Ackerman Pacific Northwest National Laboratory Richland, Washington Introduction The state variables of the atmosphere exhibit correlations at various spatial and temporal scales. These correlations are crucial for understanding short- and long-term trends in climate. Cirrus clouds are important phenomena in the troposphere affecting climate. To improve future parameterization of cirrus clouds in climate models, we must understand the cloud properties and how they change within the cloud. We consider fluctuations of cloud radar signals obtained at isodepths within cirrus clouds

242

Sustainable Transport: from Bullock Carts to Bugatis: Reflections on Major  

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

Sustainable Transport: from Bullock Carts to Bugatis: Reflections on Major Sustainable Transport: from Bullock Carts to Bugatis: Reflections on Major Transport Issues North and South Speaker(s): Lee Schipper Date: August 16, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Marcia Beck This talk reviews quantitative and qualitative trends in urban transportation and environment, focusing on developing countries. Reviewing recent efforts to look at transportation, the talk adopts a definition of "sustainable transportation" that includes economic and environmental sustainability as well as equity as key criteria. It is argued that governance sustainability is also important if policies and technologies are to reduce the main externalities from urban transport. An important identity is introduced to relate emissions to traffic, modal share, fuel

243

Subcritical Noise Measurements with a Nickel-Reflected Plutonium Sphere  

SciTech Connect (OSTI)

Subcritical measurements were conducted with an a-phase plutonium sphere reflected by nickel hemishells using the 252Cf Source-Driven Noise Analysis (CSDNA) method to provide criticality safety benchmark data. Measured configurations included a bare plutonium sphere as well as the plutonium sphere reflected by the following nickel thicknesses: 1.27, 2.54, 3.81, 5.08, and 7.62 cm. A certain ratio of spectral quantities was measured for each configuration which varies linearly with the keff of the system. In addition, two types of Monte Carlo calculations were employed: a modified version of MCNP to calculate the ratio of spectral quantities and a KCODE calculation. From the measured and computed quantities the multiplication of each configuration can be approximated. A comprehensive uncertainty analysis was then performed that includes uncertainties in the geometry and materials present in the system in addition to the uncertainties in the method and nuclear data.

Jesson D. Hutchinson; John D. Bess

2009-11-01T23:59:59.000Z

244

Method and apparatus for inspecting reflection masks for defects  

DOE Patents [OSTI]

An at-wavelength system for extreme ultraviolet lithography mask blank defect detection is provided. When a focused beam of wavelength 13 nm is incident on a defective region of a mask blank, three possible phenomena can occur. The defect will induce an intensity reduction in the specularly reflected beam, scatter incoming photons into an off-specular direction, and change the amplitude and phase of the electric field at the surface which can be monitored through the change in the photoemission current. The magnitude of these changes will depend on the incident beam size, and the nature, extent and size of the defect. Inspection of the mask blank is performed by scanning the mask blank with 13 nm light focused to a spot a few .mu.m in diameter, while measuring the reflected beam intensity (bright field detection), the scattered beam intensity (dark-field detection) and/or the change in the photoemission current.

Bokor, Jeffrey (Oakland, CA); Lin, Yun (Berkeley, CA)

2003-04-29T23:59:59.000Z

245

Reflection Survey At Coso Geothermal Area (2001) | Open Energy Information  

Open Energy Info (EERE)

Exploration Activity: Reflection Survey At Coso Geothermal Area (2001) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Reflection Survey Activity Date 2001 Usefulness not indicated DOE-funding Unknown Exploration Basis Look for features that are characteristic of the geothermal producing region not originally seen by imaging the Coso Field using seismic Notes During December of 1999, approximately 32 miles of seismic data were acquired as part of a detailed seismic investigation undertaken by the US Navy Geothermal Program Office. Data acquisition was designed to make effective use of advanced data processing methods, which include Optim's proprietary nonlinear velocity optimization technique and pre-stack Kirchhoff migration. The velocity models from the 2-D lines were combined

246

An asymptotic model of seismic reflection from a permeable layer  

SciTech Connect (OSTI)

Analysis of compression wave propagation in a poroelastic medium predicts a peak of reflection from a high-permeability layer in the low-frequency end of the spectrum. An explicit formula expresses the resonant frequency through the elastic moduli of the solid skeleton, the permeability of the reservoir rock, the fluid viscosity and compressibility, and the reservoir thickness. This result is obtained through a low-frequency asymptotic analysis of Biot's model of poroelasticity. A review of the derivation of the main equations from the Hooke's law, momentum and mass balance equations, and Darcy's law suggests an alternative new physical interpretation of some coefficients of the classical poroelasticity. The velocity of wave propagation, the attenuation factor, and the wave number, are expressed in the form of power series with respect to a small dimensionless parameter. The absolute value of this parameter is equal to the product of the kinematic reservoir fluid mobility and the wave frequency. Retaining only the leading terms of the series leads to explicit and relatively simple expressions for the reflection and transmission coefficients for a planar wave crossing an interface between two permeable media, as well as wave reflection from a thin highly-permeable layer (a lens). Practical applications of the obtained asymptotic formulae are seismic modeling, inversion, and at-tribute analysis.

Silin, D.; Goloshubin, G.

2009-10-15T23:59:59.000Z

247

Benchmarking of Graphite Reflected Critical Assemblies of UO2  

SciTech Connect (OSTI)

A series of experiments were carried out in 1963 at the Oak Ridge National Laboratory Critical Experiments Facility (ORCEF) for use in space reactor research programs. A core containing 93.2% enriched UO2 fuel rods was used in these experiments. The first part of the experimental series consisted of 253 tightly-packed fuel rods (1.27 cm triangular pitch) with graphite reflectors [1], the second part used 253 graphite-reflected fuel rods organized in a 1.506 cm triangular pitch [2], and the final part of the experimental series consisted of 253 beryllium-reflected fuel rods with a 1.506 cm triangular pitch. [3] Fission rate distribution and cadmium ratio measurements were taken for all three parts of the experimental series. Reactivity coefficient measurements were taken for various materials placed in the beryllium reflected core. The first part of this experimental series has been evaluated for inclusion in the International Reactor Physics Experiment Evaluation Project (IRPhEP) [4] and the International Criticality Safety Benchmark Evaluation Project (ICSBEP) Handbooks, [5] and is discussed below. These experiments are of interest as benchmarks because they support the validation of compact reactor designs with similar characteristics to the design parameters for a space nuclear fission surface power systems. [6

Margaret A. Marshall; John D. Bess

2011-11-01T23:59:59.000Z

248

X-RAY REFLECTED SPECTRA FROM ACCRETION DISK MODELS. III. A COMPLETE GRID OF IONIZED REFLECTION CALCULATIONS  

SciTech Connect (OSTI)

We present a new and complete library of synthetic spectra for modeling the component of emission that is reflected from an illuminated accretion disk. The spectra were computed using an updated version of our code XILLVER that incorporates new routines and a richer atomic database. We offer in the form of a table model an extensive grid of reflection models that cover a wide range of parameters. Each individual model is characterized by the photon index {Gamma} of the illuminating radiation, the ionization parameter {xi} at the surface of the disk (i.e., the ratio of the X-ray flux to the gas density), and the iron abundance A{sub Fe} relative to the solar value. The ranges of the parameters covered are 1.2 {<=} {Gamma} {<=} 3.4, 1 {<=} {xi} {<=} 10{sup 4}, and 0.5 {<=} A{sub Fe} {<=} 10. These ranges capture the physical conditions typically inferred from observations of active galactic nuclei, and also stellar-mass black holes in the hard state. This library is intended for use when the thermal disk flux is faint compared to the incident power-law flux. The models are expected to provide an accurate description of the Fe K emission line, which is the crucial spectral feature used to measure black hole spin. A total of 720 reflection spectra are provided in a single FITS file (http://hea-www.cfa.harvard.edu/{approx}javier/xillver/) suitable for the analysis of X-ray observations via the atable model in XSPEC. Detailed comparisons with previous reflection models illustrate the improvements incorporated in this version of XILLVER.

Garcia, J.; McClintock, J. E. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Dauser, T.; Wilms, J.; Eikmann, W. [Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Sternwartstr. 7, D-96049 Bamberg (Germany); Reynolds, C. S. [Department of Astronomy, University of Maryland, College Park, MD (United States); Kallman, T. R., E-mail: javier@head.cfa.harvard.edu, E-mail: jem@cfa.harvard.edu, E-mail: chris@astro.umd.edu, E-mail: thomas.dauser@sternwarte.uni-erlangen.de, E-mail: joern.wilms@sternwarte.uni-erlangen.de, E-mail: wiebke.eikmann@sternwarte.uni-erlangen.de, E-mail: timothy.r.kallman@nasa.gov [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2013-05-10T23:59:59.000Z

249

Aster Watches The World'S Volcanoes- A New Paradigm For Volcanological...  

Open Energy Info (EERE)

backward-looking visible channel telescope for stereo-photogrammetric observations. The spatial resolutions are 15 mpixel in the visible, 30 mpixel in the near-IR, and 90 m...

250

ASTERS Teacher Training will not be offered during  

E-Print Network [OSTI]

, endurance tests, and creative tasks. P. O. Box 8039 Statesboro, GA 30460 912-871-1149 912-871-1777 (fax form, visit www.georgiasouthern.edu/garden/ For more information, contact Kathy Tucker at 912-871

Hutcheon, James M.

251

Control of Willow Baccharis and Spiny Aster With Pelleted Herbicides.  

E-Print Network [OSTI]

Feral hogs Sus scrofa Whitstailed deer Odocoileus virginianus 7. . i ACKNOWLEDGMENTS The authors thank J. Wright, Agua Dulce; Tom O'Connor, Jr., Victoria; and H. M. Fagan, Refugio, for providing assistance and land use for this re- search project... Feral hogs Sus scrofa Whitstailed deer Odocoileus virginianus 7. . i ACKNOWLEDGMENTS The authors thank J. Wright, Agua Dulce; Tom O'Connor, Jr., Victoria; and H. M. Fagan, Refugio, for providing assistance and land use for this re- search project...

Mutz, J.L.; Scifres, C.J.; Mohr, W.C.; Drawe, D.L.

1979-01-01T23:59:59.000Z

252

Generalized approximations of reflection coefficients in orthorhombic media  

Science Journals Connector (OSTI)

Reflection coefficients of qP- (quasi-P) and qS- (quasi-S) incident waves in orthorhombic media can be explicitly expressed by means of impedance matrices. In this paper, we extend previous studies and derive the generalized and linearized equations of reflectivity for all four types of waves in the symmetry-axis plane. These approximations have sufficient accuracy over a wide range of angles, therefore they are suitable for characterizing the seismic amplitude responses of unconventional resources. For example, they can be applied to represent the amplitude variation with offset for shale gas or coalbed methane reservoirs with strong anisotropy and complicated symmetry. Reduced equations are then derived in a transverse isotropic medium with a vertical symmetry axis (VTI) or a horizontal axis (HTI) for the anisotropic amplitude inversion. They retain higher accuracy than the corresponding previously published expressions at a strongly anisotropic interface, because they include the second-order terms of anisotropic parameters contrast. Numerical analyses on the inverse problem using different linearized expressions show the practical value of the new derived expressions in the joint inversion of the qPqP- and qPqS-waves for elastic parameters and anisotropic parameters.

Feng Zhang; Xiangyang Li

2013-01-01T23:59:59.000Z

253

Benchmark Evaluation of Plutonium Hemispheres Reflected by Steel and Oil  

SciTech Connect (OSTI)

During the period from June 1967 through September 1969 a series of critical experiments was performed at the Rocky Flats Critical Mass Laboratory with spherical and hemispherical plutonium assemblies as nested hemishells as part of a Nuclear Safety Facility Experimental Program to evaluate operational safety margins for the Rocky Flats Plant. These assemblies were both bare and fully or partially oil-reflected. Many of these experiments were subcritical with an extrapolation to critical configurations or critical at a particular oil height. Existing records reveal that 167 experiments were performed over the course of 28 months. Unfortunately, much of the data was not recorded. A reevaluation of the experiments had been summarized in a report for future experimental and computational analyses. This report examines only fifteen partially oil-reflected hemispherical assemblies. Fourteen of these assemblies also had close-fitting stainless-steel hemishell reflectors, used to determine the effective critical reflector height of oil with varying steel-reflector thickness. The experiments and their uncertainty in keff values were evaluated to determine their potential as valid criticality benchmark experiments of plutonium.

John Darrell Bess

2008-06-01T23:59:59.000Z

254

$\\mu$-$\\tau$ reflection symmetry and radiative corrections  

E-Print Network [OSTI]

The $\\mu$-$\\tau$ reflection symmetry is compatible with current neutrino oscillation data and easily realized under family symmetries. We prove that this symmetry preserves $\\theta_{23}=45^\\circ$, $\\delta=\\pm90^\\circ$, $\\rho,\\sigma=0,90^\\circ$, and can be embedded into the seesaw mechanism. The $\\mu$-$\\tau$ reflection symmetry preserved at a high energy scale $\\Lambda_\\text{FS}$ will be broken by radiative corrections and result in deviations of $\\theta_{23}$ from $45^\\circ$ and $\\delta$ from $\\pm90^\\circ$ at the electroweak scale. We develop an analytical method to derive the corrections to all the mixing parameters. We perform a numerical analysis in the MSSM for $\\delta=-90^\\circ$ at $\\Lambda_\\text{FS}$, and observe that $\\theta_{23}>45^\\circ$ in the normal mass ordering, $\\theta_{23}<45^\\circ$ in the inverted mass ordering, and the sizable correction to $\\delta$ prefers a negative sign. These deviations have definite directions and can be tested in the future neutrino oscillation experiments.

Zhou, Ye-Ling

2014-01-01T23:59:59.000Z

255

Neutron Reflection Method for the Fast Estimation of the Neutron Removal Cross Section in Complex Materials  

Science Journals Connector (OSTI)

The present paper is devoted to expand the use of neutron reflection method for the fast estimation of ... dependence of the removal cross section from the neutron reflection coefficient was found. The sensitivit...

L. Desdin; L. M. García

2000-11-01T23:59:59.000Z

256

V-142: Oracle Java Reflection API Flaw Lets Remote Users Execute...  

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

2: Oracle Java Reflection API Flaw Lets Remote Users Execute Arbitrary Code V-142: Oracle Java Reflection API Flaw Lets Remote Users Execute Arbitrary Code April 25, 2013 - 12:14am...

257

Reflecting the Revised PM 2.5 National Ambient Air Quality Standard...  

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

Reflecting the Revised PM 2.5 National Ambient Air Quality Standard in NEPA Evaluations Reflecting the Revised PM 2.5 National Ambient Air Quality Standard in NEPA Evaluations This...

258

Non-linear multiparameter inversion using a hybrid global search algorithm: applications in reflection seismology  

Science Journals Connector (OSTI)

......global search algorithm: applications in reflection seismology Pengcheng Liu 1 Stephen Hartzell 2 William Stephenson 2 1 Institute...global search algorithm: applications in reflection seismology Pengcheng Liu,' Stephen Hartzel12and William Stephenson2 'lnstiture......

Pengcheng Liu; Stephen Hartzell; William Stephenson

1995-12-01T23:59:59.000Z

259

Reduction in Vehicle Temperatures and Fuel Use from Cabin Ventilation, Solar-Reflective Paint, and a New Solar-Reflective Glazing  

SciTech Connect (OSTI)

An analysis to determine the impact of reducing the thermal load on a vehicle using solar-reflective paint and glazing.

Rugh, J.; Chaney, L.; Meyer, J.; Rustagi, M.; Olson, K.; Kogler, R.

2007-05-01T23:59:59.000Z

260

X-ray reflectivity measurements of liquid/solid interfaces under high hydrostatic pressure conditions  

Science Journals Connector (OSTI)

A high hydrostatic pressure cell for X-ray reflectivity measurements at the solid/liquid interface is presented.

Wirkert, F.J.

2013-11-02T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Quantum reflection and interference of matter waves from periodically doped surfaces  

E-Print Network [OSTI]

We show that periodically doped, flat surfaces can act as reflective diffraction gratings for atomic and molecular matter waves. The diffraction element is realized by exploiting that charged dopants locally suppress quantum reflection from the Casimir-Polder potential. We present a general quantum scattering theory for reflection off periodically charged surfaces and discuss the requirements for the observation of multiple diffraction peaks.

Benjamin A. Stickler; Uzi Even; Klaus Hornberger

2015-01-15T23:59:59.000Z

262

Shaping of Thin Grazing-Incidence Reflection Grating Substrates via Magnetorheological Finishing  

E-Print Network [OSTI]

for sub-arcsecond reflection optics. Keywords: x-ray optics, Constellation-X, reflection gratings, thin, such as Constellation-X,1 rely on grazing-incidence reflection gratings to provide the necessary high diffraction efficiency and dispersion for soft x-ray photons in the energy range of approximately 0.25 - 2.0 keV (0.6 - 5

263

Linearity and CNR Improvement Technologies against Optical Reflection inFiber-Oriented Wireless Access Systems  

Science Journals Connector (OSTI)

It is important to consider optical reflection conditions when designing fiber-oriented wireless access systems around subcarrier optical transmission since the noise characteristic can be significantly degraded by optical reflection, especially ... Keywords: intensity noise, optical reflection, predistorter, subcarrier optical transmission, superimposed subcarrier modulation, superluminescent diode

Yuji Aburakawa; Hiroyuki Ohtsuka

2000-11-01T23:59:59.000Z

264

Statistical Analysis of Spatial Point Patterns on Deep Seismic Reflection Data: A Preliminary Test  

E-Print Network [OSTI]

Statistical Analysis of Spatial Point Patterns on Deep Seismic Reflection Data: A Preliminary Test analysis may provide a new tool for analysing spatial variations in reflection data. Key Words: Deep The purpose of this paper is to present spatial point pattern analyses of seismic reflection data in an effort

Schmidt, Volker

265

Measurements of submillimeter polarization induced by oblique reflection from aluminum alloy  

E-Print Network [OSTI]

Measurements of submillimeter polarization induced by oblique reflection from aluminum alloy Tom of submillimeter radiation when it is obliquely reflected by a flat mirror made of aluminum alloy. For angles by oblique reflection from aluminum alloy at a wavelength of 1 cm agrees with the prediction of the ordinary

Novak, Giles

266

VLF/LF reflectivity of the polar ionosphere. Report for 2 September-22 December 1979  

SciTech Connect (OSTI)

This report provides a summary of high latitude ionospheric reflectivity as observed by the USAF high resolution VLF/LF ionosounder operating in northern Greenland. Ionospheric reflectivity parameters, including reflection heights and coefficients, are presented as a function of time of day. Riometer and magnetometer measurements of the polar propagation environment are presented as supplementary data.

Pagliarulo, R.P.; Turtle, J.P.; Rasmussen, J.E.; Klemetti, W.I.

1980-06-01T23:59:59.000Z

267

Model for reflectance anisotropy spectra of molecular layered systems  

Science Journals Connector (OSTI)

We present a theoretical study based on the local field interaction for the reflectance anisotropy spectra of organic molecular layers. Each layer is formed by an ordered two-dimensional array of polarizable organic molecules that respond to the local electric field like point-like harmonic oscillators. We concentrate on the morphological characteristics of the layers and its effect on the spectra, showing that the reorientation of the molecules from layer to layer, as the system is assembled, gives rise to a line shape of the spectra that goes from peak-like to derivative-like. Our spectra shows good qualitative agreement with experimental results of a layered system of metalloporphyrin octaesters molecules deposited onto an isotropic gold substrate by the Langmuir-Schaefer technique.

Bernardo S. Mendoza and R. A. Vázquez-Nava

2005-07-05T23:59:59.000Z

268

Aberration-free, all-reflective laser pulse stretcher  

DOE Patents [OSTI]

An all-reflective pulse stretcher for laser systems employing chirped-pulse amplification enables on-axis use of the focusing mirror which results in ease of use, significantly decreased sensitivity to alignment and near aberration-free performance. By using a new type of diffraction grating which contains a mirror incorporated into the grating, the stretcher contains only three elements: 1) the grating, 2) a spherical or parabolic focusing mirror, and 3) a flat mirror. Addition of a fourth component, a retro-reflector, enables multiple passes of the same stretcher resulting in stretching ratios beyond the current state of the art in a simple and compact design. The pulse stretcher has been used to stretch pulses from 20 fsec to over 600 psec (a stretching ratio in excess of 30,000).

Perry, Michael D. (Livermore, CA); Banks, Paul S. (Livermore, CA); Stuart, Brent C. (Fremont, CA); Fochs, Scott N. (Livermore, CA)

1999-09-28T23:59:59.000Z

269

Noise Estimate of Pendular Fabry-Perot through Reflectivity Change  

E-Print Network [OSTI]

A key issue in developing pendular Fabry-Perot interferometers as very accurate displacement measurement devices, is the noise level. The Fabry-Perot pendulums are the most promising device to detect gravitational waves, and therefore the background and the internal noise should be accurately measured and reduced. In fact terminal masses generates additional internal noise mainly due to thermal fluctuations and vibrations. We propose to exploit the reflectivity change, that occurs in some special points, to monitor the pendulums free oscillations and possibly estimate the noise level. We find that in spite of long transients, it is an effective method for noise estimate. We also prove that to only retain the sequence of escapes, rather than the whole time dependent dynamics, entails the main characteristics of the phenomenon. Escape times could also be relevant for future gravitational wave detector developments.

Addesso, Paolo; Filatrella, Giovanni

2014-01-01T23:59:59.000Z

270

Copper-assisted, anti-reflection etching of silicon surfaces  

DOE Patents [OSTI]

A method (300) for etching a silicon surface (116) to reduce reflectivity. The method (300) includes electroless deposition of copper nanoparticles about 20 nanometers in size on the silicon surface (116), with a particle-to-particle spacing of 3 to 8 nanometers. The method (300) includes positioning (310) the substrate (112) with a silicon surface (116) into a vessel (122). The vessel (122) is filled (340) with a volume of an etching solution (124) so as to cover the silicon surface (116). The etching solution (124) includes an oxidant-etchant solution (146), e.g., an aqueous solution of hydrofluoric acid and hydrogen peroxide. The silicon surface (116) is etched (350) by agitating the etching solution (124) with, for example, ultrasonic agitation, and the etching may include heating (360) the etching solution (124) and directing light (365) onto the silicon surface (116). During the etching, copper nanoparticles enhance or drive the etching process.

Toor, Fatima; Branz, Howard

2014-08-26T23:59:59.000Z

271

The Effect of Non-Lambertian Surface Reflectance on Aerosol Radiative Forcing  

SciTech Connect (OSTI)

Surface reflectance is an important factor in determining the strength of aerosol radiative forcing. Previous studies of radiative forcing assumed that the reflected surface radiance is isotropic and does not depend on incident illumination angle. This Lambertian reflection model is not a very good descriptor of reflectance from real land and ocean surfaces. In this study we present computational results for the seasonal average of short and long wave aerosol radiative forcing at the top of the atmosphere and at the surface. The effect of the Lambertian assumption is found through comparison with calculations using a more detailed bi-direction reflectance distribution function (BRDF).

Ricchiazzi, P.; O'Hirok, W.; Gautier, C.

2005-03-18T23:59:59.000Z

272

DESIGN AND CONSTRUCTION OF A FORCE-REFLECTING TELEOPERATION SYSTEM  

SciTech Connect (OSTI)

For certain applications, such as space servicing, undersea operations, and hazardous material handling tasks in nuclear reactors, the environments can be uncertain, complex, and hazardous. Lives may be in danger if humans were to work under these conditions. As a result, a man-machine system--a teleoperator system--has been developed to work in these types of environments. In a typical teleoperator system, the actual system operates at a remote site; the operator located away from this system usually receives visual information from a video image and/or graphical animation on the computer screen. Additional feedback, such as aural and force information, can significantly enhance performance of the system. Force reflection is a type of feedback in which forces experienced by the remote manipulator are fed back to the manual controller. Various control methods have been proposed for implementation on a teleoperator system. In order to examine different control schemes, a one Degree-Of-Freedom (DOF) Force-Reflecting Manual Controller (FRMC) is constructed and integrated into a PC. The system parameters are identified and constructed as a mathematical model. The Proportional-Integral-Derivative (PID) and fuzzy logic controllers are developed and tested experimentally. Numerical simulation results obtained from the mathematical model are compared with those of experimental data for both types of controllers. In addition, the concept of a telesensation system is introduced. A telesensation system is an advanced teleoperator system that attempts to provide the operator with sensory feedback. In this context, a telesensation system integrates the use of a Virtual Reality (VR) unit, FRMC, and Graphical User Interface (GUI). The VR unit is used to provide the operator with a 3-D visual effect. Various commercial VR units are reviewed and features compared for use in a telesensation system. As for the FRMC, the conceptual design of a 3-DOF FRMC is developed in an effort to make the system portable, compact, and lightweight. A variety of design alternatives are presented and evaluated. Finally, a GUI software package is developed to interface with several teleoperation unit components. These components include an industrial robot, electric motor, encoder, force/torque sensor, and CCD camera. The software includes features such as position scaling, force scaling, and rereferencing and is intended to provide a sound basis for the development of a multi-DOF FRMC system in the future.

M.A. Ebadian, Ph.D.

1999-01-01T23:59:59.000Z

273

Criticality Benchmark Analysis of Water-Reflected Uranium Oxyfluoride Slabs  

SciTech Connect (OSTI)

A series of twelve experiments were conducted in the mid 1950's at the Oak Ridge National Laboratory Critical Experiments Facility to determine the critical conditions of a semi-infinite water-reflected slab of aqueous uranium oxyfluoride (UO2F2). A different slab thickness was used for each experiment. Results from the twelve experiment recorded in the laboratory notebook were published in Reference 1. Seven of the twelve experiments were determined to be acceptable benchmark experiments for the inclusion in the International Handbook of Evaluated Criticality Safety Benchmark Experiments. This evaluation will not only be available to handbook users for the validation of computer codes and integral cross-section data, but also for the reevaluation of experimental data used in the ANSI/ANS-8.1 standard. This evaluation is important as part of the technical basis of the subcritical slab limits in ANSI/ANS-8.1. The original publication of the experimental results was used for the determination of bias and bias uncertainties for subcritical slab limits, as documented by Hugh Clark's paper 'Subcritical Limits for Uranium-235 Systems'.

Margaret A. Marshall; John D. Bess

2009-11-01T23:59:59.000Z

274

Space-fractional advection-diffusion and reflective boundary condition  

Science Journals Connector (OSTI)

Anomalous diffusive transport arises in a large diversity of disordered media. Stochastic formulations in terms of continuous time random walks (CTRWs) with transition probability densities showing space- and/or time-diverging moments were developed to account for anomalous behaviors. A broad class of CTRWs was shown to correspond, on the macroscopic scale, to advection-diffusion equations involving derivatives of noninteger order. In particular, CTRWs with Lévy distribution of jumps and finite mean waiting time lead to a space-fractional equation that accounts for superdiffusion and involves a nonlocal integral-differential operator. Within this framework, we analyze the evolution of particles performing symmetric Lévy flights with respect to a fluid moving at uniform speed v. The particles are restricted to a semi-infinite domain limited by a reflective barrier. We show that the introduction of the boundary condition induces a modification in the kernel of the nonlocal operator. Thus, the macroscopic space-fractional advection-diffusion equation obtained is different from that in an infinite medium.

Natalia Krepysheva; Liliana Di Pietro; Marie-Christine Néel

2006-02-22T23:59:59.000Z

275

Three-dimensional light trap for reflective particles  

DOE Patents [OSTI]

A system for containing either a reflective particle or a particle having an index of refraction lower than that of the surrounding media in a three-dimensional light cage. A light beam from a single source illuminates an optics system and generates a set of at least three discrete focussed beams that emanate from a single exit aperture and focus on to a focal plane located close to the particle. The set of focal spots defines a ring that surrounds the particle. The set of focussed beams creates a "light cage" and circumscribes a zone of no light within which the particle lies. The surrounding beams apply constraining forces (created by radiation pressure) to the particle, thereby containing it in a three-dimensional force field trap. A diffractive element, such as an aperture multiplexed lens, or either a Dammann grating or phase element in combination with a focusing lens, may be used to generate the beams. A zoom lens may be used to adjust the size of the light cage, permitting particles of various sizes to be captured and contained.

Neal, Daniel R. (Tijeras, NM)

1999-01-01T23:59:59.000Z

276

Water-Moderated and -Reflected Slabs of Uranium Oxyfluoride  

SciTech Connect (OSTI)

A series of ten experiments were conducted at the Oak Ridge National Laboratory Critical Experiment Facility in December 1955, and January 1956, in an attempt to determine critical conditions for a slab of aqueous uranium oxyfluoride (UO2F2). These experiments were recorded in an Oak Ridge Critical Experiments Logbook and results were published in a journal of the American Nuclear Society, Nuclear Science and Engineering, by J. K. Fox, L. W. Gilley, and J. H. Marable (Reference 1). The purpose of these experiments was to obtain the minimum critical thickness of an effectively infinite slab of UO2F2 solution by extrapolation of experimental data. To do this the slab thickness was varied and critical solution and water-reflector heights were measured using two different fuel solutions. Of the ten conducted experiments eight of the experiments reached critical conditions but the results of only six of the experiments were published in Reference 1. All ten experiments were evaluated from which five critical configurations were judged as acceptable criticality safety benchmarks. The total uncertainty in the acceptable benchmarks is between 0.25 and 0.33 % ?k/keff. UO2F2 fuel is also evaluated in HEU-SOL-THERM-043, HEU-SOL-THERM-011, and HEU-SOL-THERM-012, but these those evaluation reports are for large reflected and unreflected spheres. Aluminum cylinders of UO2F2 are evaluated in HEU-SOL-THERM-050.

Margaret A. Marshall; John D. Bess; J. Blair Briggs; Clinton Gross

2010-09-01T23:59:59.000Z

277

Double and Negative Reflection of Cold Atoms in Non-Abelian Gauge Potentials  

SciTech Connect (OSTI)

Atom reflection is studied in the presence of a non-Abelian vector potential proportional to a spin-1/2 operator. The potential is produced by a relatively simple laser configuration for atoms with a tripod level scheme. We show that the atomic motion is described by two different dispersion branches with positive or negative chirality. As a consequence, atom reflection shows unusual features, since an incident wave may split into two reflected ones at a barrier, an ordinary specular reflection, and an additional nonspecular one. Remarkably, the latter wave can exhibit negative reflection and may become evanescent if the angle of incidence exceeds a critical value. These reflection properties are crucial for future designs in non-Abelian atom optics.

Juzeliunas, Gediminas [Institute of Theoretical Physics and Astronomy of Vilnius University, A. Gostauto 12, Vilnius 01108 (Lithuania); Department of Physics and Technology, Vilnius Pedagogical University, Studentu 39, Vilnius 08106 (Lithuania); Ruseckas, Julius [Institute of Theoretical Physics and Astronomy of Vilnius University, A. Gostauto 12, Vilnius 01108 (Lithuania); Jacob, Andreas; Santos, Luis [Institut fuer Theoretische Physik, Leibniz Universitaet, Hannover D30167 (Germany); Oehberg, Patrik [SUPA, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom)

2008-05-23T23:59:59.000Z

278

Soiling of building envelope surfaces and its effect on solar reflectance - Part II: Development of an accelerate aging method for roofing materials  

E-Print Network [OSTI]

values of solar reflectance and thermal emittance attainedreport values of solar reflectance and thermal emittance ofaverage aged solar reflectance and thermal emittance values

, Mohamad Sleiman

2014-01-01T23:59:59.000Z

279

Some effects of range upon AN/CPS-9 radar reflectivities in thunderstorms  

E-Print Network [OSTI]

of Department) January 1961 Echo height and radar reflectivity measurements are obtained for central and southeast Texas thunderstorms. Storms are classified into five categories according to the severity of surface weather reported by cooper- ative... observers ~ U. S. Weather Bureau severe storm summaries, and news- paper clippings. Median profiles of the reflectivities are constructed, and comparisons are made between reflectivities measured at various ranges. Regression curves are obtained which...

Sanford, Tom E

2012-06-07T23:59:59.000Z

280

Evaluation of Advanced Heliostat Reflective Facets on Cost and Performance  

Science Journals Connector (OSTI)

Abstract Heliostat reflective facets have traditionally been constructed with glass/silver and metal back support, which may be near reaching its minimum cost point. During the past year, Sandia National Laboratories evaluated alternative low-cost materials and manufacturing methods to construct facets with the goal of reducing current facet cost by at least 25% while maintaining surface slope errors of 1 milli-radians RMS or below. Several companies developed prototype facet samples, which were optically evaluated at Sandia and compared to baseline facet samples using a proposed cost-to-performance metric. A cost-performance metric for comparing facets was developed by modeling and optimizing the hypothetical SunShot 200 \\{MWe\\} power tower plant scenario in DELSOL, a computer code for system-level modeling of power tower systems. We varied the slope error on the facets and adjusted the cost on the facets to maintain a constant plant levelized cost of energy (LCOE). The result of these models provided a chart of the facet optical performance and the allowable facet cost for a constant plant LCOE. The size of the prototype facet samples ranged from 1.4 to 3 m2. The measured optical slope errors were between 1 and 2 milli- radians RMS when compared to a flat mirror design shape. Despite slope errors greater than 1 milli-radians RMS, some of the prototype samples met the cost goals for this project using the cost-performance metric. Next steps are to work with the companies to improve the manufacturing processes and further reduce the cost and improve on the optical performance to reach Department of Energy SunShot goal of $75/m2 for heliostats.

J. Yellowhair; C.E. Andraka

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Home, Home (Video) on the Range: Reflections on Small-Town Video Stores in 2010  

E-Print Network [OSTI]

Home,Home (Video) on the Range Reflections on Small-Town VideoFields Journal no. 1 (2010) Home, Home (Video) on the Range

Herbert, Daniel

2010-01-01T23:59:59.000Z

282

Synthesis of Multipole Acoustic Logging Measurements Using the Generalized Reflection/Transmission Matrices Method  

E-Print Network [OSTI]

Synthesis of Multipole Acoustic Logging Measurements Using the Generalized Reflection analytical method that has been used in multipole waveform synthesis for radially multilayered formations

Torres-Verdín, Carlos

283

Reflection Survey At Fish Lake Valley Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

(1 January 2011) GTP ARRA Spreadsheet Additional References Retrieved from "http:en.openei.orgwindex.php?titleReflectionSurveyAtFishLakeValleyArea(DOEGTP)&oldid402617...

284

E-Print Network 3.0 - attenuated total reflectance-fourier Sample...  

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

(AA) monomerswas visualized and analyzed using attenuated total reflection-Fourier transform Source: Freger, Viatcheslav "Slava" - Zuckerberg Institute for Water Research,...

285

E-Print Network 3.0 - attenuated total reflection-fourier Sample...  

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

(AA) monomerswas visualized and analyzed using attenuated total reflection-Fourier transform Source: Freger, Viatcheslav "Slava" - Zuckerberg Institute for Water Research,...

286

Characterization of Diffuse Reflectance FT-IR Spectrometry for Heterogeneous Catalyst Studies  

Science Journals Connector (OSTI)

The characteristics of diffuse reflectance (DR) infrared spectrometry for the study of adsorbed species were investigated. DR spectra of adsorbed CO on supported catalysts with a...

Van Every, Kenneth W; Griffiths, Peter R

1991-01-01T23:59:59.000Z

287

E-Print Network 3.0 - albedo reflectance Sample Search Results  

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

Implications for the surface energy budget Summary: albedo to the extrapolation algorithm andor to the Bidirectional Reflectance Distribution Function (BRDF... ;hemispheric...

288

E-Print Network 3.0 - atrophy rate reflecting Sample Search Results  

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

search results for: atrophy rate reflecting Page: << < 1 2 3 4 5 > >> 1 Evaluation of Brain Atrophy Estimation Algorithms using Simulated Ground-Truth Data Summary: diseases....

289

Anisotropic dynamic model of forbidden reflections in x-ray diffraction  

Science Journals Connector (OSTI)

A dynamic model of anisotropic x-ray diffraction is developed using two-wave approximation. A dispersion surface equation is derived for the screw-axis and glide-plane forbidden reflections. Propagation and polarization phenomena of waves are discussed. The deductions show that all these forbidden reflections may be excited except the 00l (l=2n+1) reflections for a 63 screw axis and the 00l (l=6n+3) reflections for 61 and 65 screw axes. The general methods are illustrated by their application to the rutile structure.

Yong Li, Yi Ding, X. R. Huang, X. S. Wu, W. J. Liu, and S. S. Jiang

1999-09-01T23:59:59.000Z

290

Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection  

Science Journals Connector (OSTI)

We propose a switchable achromatic reflector using a long-pitch cholesteric liquid crystal (CLC) whose Bragg reflection wavelength is chosen to be infrared by controlling the pitch...

Kim, Ki-Han; Jin, Hye-Jung; Park, Kyoung-Ho; Lee, Joun-Ho; Kim, Jae Chang; Yoon, Tae-Hoon

2010-01-01T23:59:59.000Z

291

Reflection Survey At Oceanic-Marine Systems (Singh, Et Al., 1999...  

Open Energy Info (EERE)

Oceanic-Marine Systems (Singh, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Oceanic-Marine Systems (Singh,...

292

Optical and Thermal Characterization of High Reflective Surface with Applications in Thermal-Solar Technology  

Science Journals Connector (OSTI)

Selective solar absorbing coating consists of a high thermal reflectance layer and high solar absorbance layer deposited over a substrate. In this work optical and thermal properties...

Macias, Juan Daniel; Ramirez Rincon, Jorge Andres; Lizama Tzec, Francisco Ivan; Ares Muzio, Oscar Eduardo; Oskam, Gerko; De Coss Gomez, Romeo; Alvarado Gil, Juan José

293

Optical and Thermal Characterization of High Reflection Surfaces with Applcations in Thermal-Solar Technology  

Science Journals Connector (OSTI)

Selective solar absorbing coating consists of a high thermal reflectance layer and a high solar absorbance layer deposited over a substrate. In this work optical and thermal properties...

Macias, Juan Daniel; Ramirez Rincon, Jorge Andres; Lizama Tzec, Francisco Ivan; Ares Muzio, Oscar Eduardo; Oskam, Gerko; De Coss Gomez, Romeo; Alvarado Gil, Juan José

294

Anatomy-Based Algorithms for Detecting Oral Cancer Using Reflectance and Fluorescence Spectroscopy  

E-Print Network [OSTI]

OBJECTIVES: We used reflectance and fluorescence spectroscopy to noninvasively and quantitatively distinguish benign from dysplastic/malignant oral lesions. We designed diagnostic algorithms to account for differences in ...

McGee, Sasha

295

Planetary Wave Breaking and Nonlinear Reflection: Seasonal Cycle and Interannual Variability  

E-Print Network [OSTI]

On the effects of the Hadley circu- lation and westerly2002: Effect of the Hadley circulation on the reflection ofdue to the strong wintertime Hadley circulation. The Hadley

Abatzoglou, John T; Magnusdottir, Gudrun

2006-01-01T23:59:59.000Z

296

E-Print Network 3.0 - architecture reflects pluripotency Sample...  

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

Search Powered by Explorit Topic List Advanced Search Sample search results for: architecture reflects pluripotency Page: << < 1 2 3 4 5 > >> 1 Leading Edge Chromatin...

297

CONCRETE REFLECTED ARRAYS OF U(93.2) METAL  

SciTech Connect (OSTI)

During the period from 1963 – 1973, experiments involving highly enriched uranium units were performed at the Oak Ridge National Laboratory Critical Experiments Facility to determine various critical configurations of three-dimensional arrays. The experiments formed a four-part series, and were reported by several different experimenters; the results of interest for this evaluation are those reported for the fourth experimentation, Critical Three-Dimensional Arrays of Neutron Interacting Units: Part IV, published and performed by D.W.Magnuson (Ref 1). Information is also available in the logbook . This set of experiments utilized subcritical metal units on a split table apparatus to determine critical configurations for 2×2×2 arrangements of highly enriched uranium reflected by concrete. Magnuson manipulated the configuration of several uranium cylinders and blocks within a concrete reflector. The different permutations utilized uranium cylinders of two different heights in various positions in the three dimensional array; certain cases also placed thin uranium blocks on top of the cylinders. The thickness of the surrounding concrete, as well as the inner dimensions of the concrete reflector was also varied in certain cases. The variations resulted in fourteen different experimental permutations or configurations. All fourteen configurations were judged to be unacceptable for use as criticality safety benchmarks. All experiments were initially evaluated; however only three configurations were evaluated in detail. Configurations 2, 4, 6 and 12 were not evaluated in detail because they are subcritical and configurations 5, 7, 8, 9, and 10 were also were not evaluated in detail because they were supercritical by more than beta effective (~0.007), or prompt critical. The experiments evaluated in detail for this benchmark were configurations 1, 3, and 11. The experimental report also contains the information for HEU-MET-FAST-056. Closely related work has been recorded in HEU-MET-FAST-053, which is a benchmark evaluation of a different series of three dimensional array experiments with four different moderator materials. HEU-MET-FAST-023 and HEU-MET-FAST-026 are also related because they utilize the same metal cylinders as these experiments.

Mackenzie Gorham; John D. Bess; J. Blair Briggs; Virginia Dean; Davis Reed

2010-09-01T23:59:59.000Z

298

Doubles counting of highly multiplying items in reflective surroundings  

SciTech Connect (OSTI)

When a neutrons are counted from a spontaneously fissile multiplying item in a reflecting environment the temporal behavior of the correlated signal following neutron birth is complex. At early times the signal is dominated by prompt fission events coming from spontaneous fission bursts and also from prompt fast-neutron induced fission events. At later times neutrons 'returning' from the surroundings induce fission and give rise to an additional chain of correlated events. The prompt and returning components probe the fissile and fertile constituents of the item in different ways and it is potentially beneficial to exploit this fact. In this work we look at how the two components can be represented using a linear combination of two simple functions. Fitting of the composite function to the capture time distribution represents one way of quantifying the proportion of each contribution. Another approach however is to use a dual shift register analysis where after each triggering event two coincidence gates are opened, one close to the trigger that responds preferentially to the prompt dynamics and one later in time which is more sensitive to the returning neutron induced events. To decide on the best gate positions and gate widths and also to estimate the counting precision we can use the analytical fit to work out the necessary gate utilization factors which are required in both these calculations. In this work, we develop the approach. Illustrative examples are given using spent Low Enriched Uranium (LEU) Pressurized light Water Reactor (LWR) fuel assemblies submersed in borated water and counted in a ring of {sup 3}He gas-filled proportional counters. In this case the prompt component is dominated by {sup 244}Cm spontaneous fission and induced fast neutron fission in for example {sup 238}U while the returning low energy neutrons induce fission mainly in the fissile nuclides such as {sup 239}Pu, {sup 241}Pu and {sup 235}U. One requirement is to calculate the Random Triggered Interrogation Gate Utilization Factor needed to make a priori precision estimates but not available from Monte Carlo simulation code MCNPX.

Croft, Stephen [Los Alamos National Laboratory; Evans, Louise G [Los Alamos National Laboratory; Schear, Melissa A [Los Alamos National Laboratory; Tobin, Stephen J [Los Alamos National Laboratory

2010-11-18T23:59:59.000Z

299

A Vervaat-like path transformation for the reflected Brownian bridge  

E-Print Network [OSTI]

A Vervaat-like path transformation for the reflected Brownian bridge conditioned on its local time for the reflected Brownian bridge conditioned on its local time at 0: up to random shifts, this process equals the two processes constructed from a Brownian bridge and a Brownian excursion by adding a drift

Chassaing, Philippe - Institut de Mathématiques �lie Cartan, Université Henri Poincaré

300

Seismic reflection imaging of the Mount Rose fault zone, Reno, Nevada  

E-Print Network [OSTI]

Seismic reflection imaging of the Mount Rose fault zone, Reno, Nevada Project Award Number: # G09AP expressed or implied, of the U.S. Government. #12;2 Abstract Five new high-resolution seismic reflection00071 Submission date: November 30, 2010 CGISS Technical Report 10-01 Lee M. Liberty Center

Barrash, Warren

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Measurement of reflective liquid crystal displays S. T. Tang and H. S. Kwoka)  

E-Print Network [OSTI]

and reflective LCDs. © 2002 American Institute of Physics. DOI: 10.1063/1.1473698 I. INTRODUCTION Reflective to obvious visual defects and coloration. For the case of LCoS microdisplays, the need for accu- rate cell for transmissive cells.6­13 These methods require the incident light to pass through the test cell

302

Solar Reflectance Index (SRI) Calculation Worksheet SRI-WS Computer Generated Form  

E-Print Network [OSTI]

Zone: Building Type: Residential Nonresidential Project Name: Project Address: Roofing Products (Cool Roof) Roofing products with high solar reflectance and thermal emittance are referred to as "Cool Roof required to provide air conditioning. The benefit of a high reflectance surface is obvious: while dark

303

A near-infrared reflectance sensor for soil surface moisture measurement  

Science Journals Connector (OSTI)

Soil moisture is an important soil property that has important functions in various studies and applications, such as agricultural practices, hydrological processes and ecological issues. A near-infrared (NIR) reflectance sensor designed for moisture ... Keywords: Light-emitting diode, Near-infrared reflectance, Relative absorption depth, Soil moisture

Zhe Yin; Tingwu Lei; Qinghong Yan; Zhanpeng Chen; Yuequn Dong

2013-11-01T23:59:59.000Z

304

Modeling the diffuse reflectance due to a narrow beam incident on a turbid medium  

E-Print Network [OSTI]

of an asymptotic analysis of the radiative transport equation for strong scattering, weak absorption, and a narrow of the radiative transport equation, we show that this diffuse reflectance model gives results that are accurate for the diffuse reflectance from the solution of the radiative transport equation. However, using the solution

Kim, Arnold D.

305

Transparent Cockpit: Visual Assistance System for Vehicle Using Retro-reflective Projection Technology  

E-Print Network [OSTI]

Transparent Cockpit: Visual Assistance System for Vehicle Using Retro-reflective Projection is displayed on the inner wall of the vehicle using a retro-reflective projection technology. In this system, such as the traffic sign detection system[l, 2], blind spot monitor[5, 11], night view system[13], and using a retro

Tachi, Susumu

306

On the design of the ECMAScript Reflection API TOM VAN CUTSEM, Vrije Universiteit Brussel  

E-Print Network [OSTI]

A On the design of the ECMAScript Reflection API TOM VAN CUTSEM, Vrije Universiteit Brussel MARK S. MILLER, Google Research We describe in detail the new reflection API of the upcoming Javascript standard. The most prominent feature of this new API is its support for creating proxies: virtual objects that behave

Steels, Luc

307

Reflections in computer modeling of rooms: Current approaches and possible extensions  

Science Journals Connector (OSTI)

Computer modeling of rooms is most commonly done by some calculation technique that is based on decomposing the sound field into separate reflection components. In a first step a list of possible reflection paths is found and in a second step an impulse response is constructed from the list of reflections. Alternatively the list of reflections is used for generating a simpler echogram the energy decay as function of time. A number of geometrical acoustics?based methods can handle specular reflections diffuse reflections edge diffraction curved surfaces and locally/non?locally reacting surfaces to various degrees. This presentation gives an overview of how reflections are handled in the image source method and variants of the ray?tracing methods which are dominating today in commercial software as well as in the radiosity method and edge diffraction methods. The use of the recently standardized scattering and diffusion coefficients of surfaces is discussed. Possibilities for combining edge diffraction surface scattering and impedance boundaries are demonstrated for an example surface. Finally the number of reflection paths becomes prohibitively high when all such combinations are included as demonstrated for a simple concert hall model. [Work supported by the Acoustic Research Centre through NFR Norway.

2005-01-01T23:59:59.000Z

308

Autonomous buoy for seismic reflection data acquisition in the inaccessible parts of the Arctic Ocean  

E-Print Network [OSTI]

Autonomous buoy for seismic reflection data acquisition in the inaccessible parts of the Arctic Instrumentation, Bergen, Norway An autonomous buoy which collects seismic reflection data and transmits to shore of the seismic buoy (thick red, green and black lines). - we have successfully developed an autonomous buoy

Kristoffersen, Yngve

309

Uranium Oxide as a Highly Reflective Coating from 150-350 eV  

E-Print Network [OSTI]

of depleted uranium metal (less than 0.2% U-235). After sputtering, the uranium was allowed to oxidize1 Uranium Oxide as a Highly Reflective Coating from 150-350 eV Richard L. Sandberg, David D. Allred.byu.edu ABSTRACT We present the measured reflectances (beamline 6.3.2, ALS at LBNL) of naturally oxidized uranium

Hart, Gus

310

Improved spatial resolution for reflection mode infrared microscopy Hans A. Bechtel,1  

E-Print Network [OSTI]

illumination of the secondary mirror, as is the case with transmission mode. The PSF of a Schwarzschild December 2009 Standard commercial infrared microscopes operating in reflection mode use a mirror to direct the reflected light from the sample to the detector. This mirror blocks about half of the incident light

Martin, Michael C.

311

Doppler Effect Associated with the Reflection of Light on a Moving Mirror  

E-Print Network [OSTI]

The Doppler Effect associated with the reflection on a moving mirror is reduced to two Doppler Effect experiments involving the incoming incident ray and the outgoing reflected ray or vice-versa. The dependence of the corresponding Doppler factors on the incidence angle on the stationary mirror.

Bernhard Rothenstein; Ioan Damian

2005-08-18T23:59:59.000Z

312

Near-Infrared Reflectance Spectroscopy is a Rapid, Cost-Effective Predictor  

E-Print Network [OSTI]

Near-Infrared Reflectance Spectroscopy is a Rapid, Cost-Effective Predictor of Seagrass Nutrients + Business Media, Inc. 2006 Abstract Near-infrared reflectance spectroscopy was used to analyze nutrient com to the laboratory, and separated into leaf and root/rhizome fractions. They were dried, ground, and near-infrared

Marsh, Helene

313

V-142: Oracle Java Reflection API Flaw Lets Remote Users Execute Arbitrary  

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

2: Oracle Java Reflection API Flaw Lets Remote Users Execute 2: Oracle Java Reflection API Flaw Lets Remote Users Execute Arbitrary Code V-142: Oracle Java Reflection API Flaw Lets Remote Users Execute Arbitrary Code April 25, 2013 - 12:14am Addthis PROBLEM: Oracle Java Reflection API Flaw Lets Remote Users Execute Arbitrary Code PLATFORM: Version(s): 7 Update 21; possibly other versions (1.7.0_21-b11) Java Server JRE is also affected. ABSTRACT: A vulnerability was reported in Oracle Java. REFERENCE LINKS: SecurityTracker Alert ID: 1028466 Oracle IMPACT ASSESSMENT: Medium DISCUSSION: A remote user can create a specially crafted Java application that, when loaded and approved by the target user, will trigger a flaw in the Reflection API to bypass the security sandbox. IMPACT: A remote user can create a Java file that, when loaded by the target user,

314

Influence of ionization on reflection of solitary waves in a magnetized plasma  

SciTech Connect (OSTI)

The reflection of nonlinear solitary waves is studied in a nonuniform, magnetized plasma diffusing from an ionization source along the magnetic field lines. Contribution of the ionization term is included in the continuity equation. The behavior of solitary waves is governed by modified form of Korteweg–de Vries equation (called mKdV equation). In order to investigate the reflection of solitary waves, the mKdV equations for the right and left going waves are derived, and solved by finding new transformations coupled at the point of reflection, for obtaining the expression of reflection coefficient. Contrary to the case of usual inhomogeneous plasma, the present analysis shows that a combination of usual sech{sup 2} structure and tanh structure (called the tail of soliton) arises due to the influence of ionization term. Interestingly, this tailing structure disappears after the reflection of the soliton and hence, the soliton is downshifted prominently.

Jyoti,; Malik, Hitendra K. [Plasma Waves and Particle Acceleration Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016 (India)] [Plasma Waves and Particle Acceleration Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016 (India); Kumar, Ravinder [Department of Physics, Janta Vedic College Baraut, Uttar Pradesh 265 001 (India)] [Department of Physics, Janta Vedic College Baraut, Uttar Pradesh 265 001 (India); Dahiya, Raj P. [Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi 110 016 (India)] [Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi 110 016 (India)

2013-09-15T23:59:59.000Z

315

X-ray reflection in accreting stellar-mass black hole systems  

E-Print Network [OSTI]

The X-ray spectra of accreting stellar-mass black hole systems exhibit spectral features due to reflection, especially broad iron K alpha emission lines. We investigate the reflection by the accretion disc that can be expected in the high/soft state of such a system. First, we perform a self-consistent calculation of the reflection that results from illumination of a hot, inner portion of the disc with its atmosphere in hydrostatic equilibrium. Then we present reflection spectra for a range of illumination strengths and disc temperatures under the assumption of a constant-density atmosphere. Reflection by a hot accretion disc differs in important ways from that of a much cooler disc, such as that expected in an active galactic nucleus.

R. R. Ross; A. C. Fabian

2007-09-03T23:59:59.000Z

316

Polyethylene-reflected plutonium metal sphere : subcritical neutron and gamma measurements.  

SciTech Connect (OSTI)

Numerous benchmark measurements have been performed to enable developers of neutron transport models and codes to evaluate the accuracy of their calculations. In particular, for criticality safety applications, the International Criticality Safety Benchmark Experiment Program (ICSBEP) annually publishes a handbook of critical and subcritical benchmarks. Relatively fewer benchmark measurements have been performed to validate photon transport models and codes, and unlike the ICSBEP, there is no program dedicated to the evaluation and publication of photon benchmarks. Even fewer coupled neutron-photon benchmarks have been performed. This report documents a coupled neutron-photon benchmark for plutonium metal reflected by polyethylene. A 4.5-kg sphere of ?-phase, weapons-grade plutonium metal was measured in six reflected configurations: (1) Bare; (2) Reflected by 0.5 inch of high density polyethylene (HDPE); (3) Reflected by 1.0 inch of HDPE; (4) Reflected by 1.5 inches of HDPE; (5) Reflected by 3.0 inches of HDPE; and (6) Reflected by 6.0 inches of HDPE. Neutron and photon emissions from the plutonium sphere were measured using three instruments: (1) A gross neutron counter; (2) A neutron multiplicity counter; and (3) A high-resolution gamma spectrometer. This report documents the experimental conditions and results in detail sufficient to permit developers of radiation transport models and codes to construct models of the experiments and to compare their calculations to the measurements. All of the data acquired during this series of experiments are available upon request.

Mattingly, John K.

2009-11-01T23:59:59.000Z

317

Durable silver mirror with ultra-violet thru far infra-red reflection  

DOE Patents [OSTI]

A durable highly reflective silver mirror characterized by high reflectance in a broad spectral range of about 300 nm in the UV to the far infrared (.about.10000 nm), as well as exceptional environmental durability. A high absorptivity metal underlayer is used which prevents the formation of a galvanic cell with a silver layer while increasing the reflectance of the silver layer. Environmentally durable overcoat layers are provided to enhance mechanical and chemical durability and protect the silver layer from corrosion and tarnishing, for use in a wide variety of surroundings or climates, including harsh or extreme environments.

Wolfe, Jesse D. (Discovery Bay, CA)

2010-11-23T23:59:59.000Z

318

Advances in Measuring Solar Reflectance-or, Why That Roof isn't as Cool  

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

Advances in Measuring Solar Reflectance-or, Why That Roof isn't as Cool Advances in Measuring Solar Reflectance-or, Why That Roof isn't as Cool as You Thought it Was Speaker(s): Ronnen Levinson Date: June 30, 2009 - 12:00pm Location: LBNL Bldg. 66 Auditorium Solar reflectance is often used to estimate the solar heat gain and rate the "coolness" of roofs and pavements. A solar reflectance property measured by two popular ASTM standard test methods (E903, C1549) can underestimate the peak solar heat gain of a spectrally selective "cool colored" surface by nearly 100 W m-2 because it assumes that sunlight contains an unrealistically high fraction of near-infrared (invisible) energy. Its use in building energy simulations can overestimate cool-roof annual energy savings by more than 20%. I define a new and simple solar

319

Coincident P and Sh reflections from basement rocks at Coso geothermal  

Open Energy Info (EERE)

Coincident P and Sh reflections from basement rocks at Coso geothermal Coincident P and Sh reflections from basement rocks at Coso geothermal field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Coincident P and Sh reflections from basement rocks at Coso geothermal field Details Activities (2) Areas (1) Regions (0) Abstract: In mid-1989 the authors designed and collected four seismic reflection/refraction profiles that addressed the crustal structure of the Coso geothermal field. The two main east-west and north-south profiles crossed at the southeasternmost base of Sugar Loaf Mountain. Both in-line and cross-line Vibroseis and explosion data were recorded on each of these approximately 12-mi lines. This was accomplished with the simultaneous operation of two 1024-channel sign bit recording systems while four

320

Reflection Survey At Lightning Dock Area (Cunniff & Bowers, 2005) | Open  

Open Energy Info (EERE)

Reflection Survey At Lightning Dock Area (Cunniff & Reflection Survey At Lightning Dock Area (Cunniff & Bowers, 2005) Exploration Activity Details Location Lightning Dock Area Exploration Technique Reflection Survey Activity Date Usefulness useful DOE-funding Unknown Notes After reviewing bids from six firms, LDG contracted with Bird Geophysical Services ("Bird") to conduct a test to determine if relatively small, spring-assisted, drop weights could be used to successfully acquire deep reflections. This test showed that the contractor could produce usable data to depths of more than 1,500 ms two-way travel time. (For a given velocity model, this two-way travel time is equivalent to several kilometers of depth penetration.) Subsequently, LDG used Bird's services to acquire new traverses totaling about 27.6 km (17.2 mi.) along roads leading through the

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Reflection Survey At Dixie Valley Geothermal Field Area (Blackwell, Et Al.,  

Open Energy Info (EERE)

9) 9) Exploration Activity Details Location Dixie Valley Geothermal Field Area Exploration Technique Reflection Survey Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes "The seismic reflection profiles of the range front structures are difficult to interpret because of he steep dips and 3-d fault zone geometry, in the-classical paper by Okaya and Thompson (1985) the range-bounding fault is not imaged as they proposed. The reflection seismic studies are the most useful of the geophysical techniques also the most expensive. The reflection data are two-dimensional making structural interpretation complicated for the three-dimensional geometry of the basin so that the other structural studied have been critical in correctly interpreting the seismic profiles. There are many

322

Reflection Survey At Hot Sulphur Springs Area (Laney, 2005) | Open Energy  

Open Energy Info (EERE)

Reflection Survey At Hot Sulphur Springs Area (Laney, 2005) Reflection Survey At Hot Sulphur Springs Area (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Hot Sulphur Springs Area (Laney, 2005) Exploration Activity Details Location Hot Sulphur Springs Area Exploration Technique Reflection Survey Activity Date Usefulness useful DOE-funding Unknown Notes Seismic Imaging, Majer, Gritto and Daley. The project objective includes the development and application of active seismic methods for improved understanding of the subsurface structure, faults, fractures lithology, and fluid paths in geothermal reservoirs. While the objective of the work previous to FY2003 was concerned with the detection and location of faults and fractures based on an existing 3-D seismic data set collected at the

323

Reflecting the Revised PM 2.5 National Ambient Air Quality Standard in NEPA Evaluations  

Broader source: Energy.gov [DOE]

This letter, from the Director of the Environmental Protection Agency's Office of Federal Activities, outlines EPA's position as to how the revised National Air Quality Standard should be reflected in NEPA evaluations of proposed actions.

324

Observed Southern Ocean Cloud Properties and Shortwave Reflection. Part II: Phase Changes and Low Cloud Feedback  

Science Journals Connector (OSTI)

Climate models produce an increase in cloud optical depth in midlatitudes associated with climate warming, but the magnitude of this increase and its impact on reflected solar radiation vary from model to model. Transition from ice to liquid in ...

Daniel T. McCoy; Dennis L. Hartmann; Daniel P. Grosvenor

2014-12-01T23:59:59.000Z

325

Mathematical modelling: a path to political reflection in the mathematics class  

Science Journals Connector (OSTI)

......the models constructed, . political reflection on the results...the teacher opts for this political view in applying modelling...comfort zone', and go into a risk zone, marked by the need to take a political stand, by questioning and......

Otávio Roberto Jacobini; Maria Lúcia L. Wodewotzki

2006-03-01T23:59:59.000Z

326

Neutron Reflection Method for the Fast Estimation of Neutron Removal Cross Section in Hydrogenous Materials  

Science Journals Connector (OSTI)

Neutron reflection method was used for the fast estimation of the neutron removal cross section in hydrogenous materials of ... to hydrogenous materials with a low concentration of neutron absorbing elements.

L. Desdin; C. Ceballos

2000-03-01T23:59:59.000Z

327

Simulation Studies of Hydrogen Ion reflection from Tungsten for the Surface Production of Negative Hydrogen Ions  

SciTech Connect (OSTI)

The production efficiency of negative ions at tungsten surface by particle reflection has been investigated. Angular distributions and energy spectra of reflected hydrogen ions from tungsten surface are calculated with a Monte Carlo simulation code ACAT. The results obtained with ACAT have indicated that angular distributions of reflected hydrogen ions show narrow distributions for low-energy incidence such as 50 eV, and energy spectra of reflected ions show sharp peaks around 90% of incident energy. These narrow angular distributions and sharp peaks are favorable for the efficient extraction of negative ions from an ion source equipped with tungsten surface as negative ionization converter. The retained hydrogen atoms in tungsten lead to the reduction in extraction efficiency due to boarded angular distributions.

Kenmotsu, Takahiro; Wada, Motoi [Doshisha University, Kyotanabe, Kyoto 610-0394 (Japan)

2011-09-26T23:59:59.000Z

328

Technique for measuring the reflectance of irregular, submillimeter-sized samples  

Science Journals Connector (OSTI)

Details are given of a technique for measuring the reflectance at near-normal incidence of small, irregular, submillimeter-sized samples from the far IR (40 cm?1) to the...

Homes, Christopher C; Reedyk, M; Cradles, D A; Timusk, T

1993-01-01T23:59:59.000Z

329

Impacts of a recurrent resuspension event and variable phytoplankton community composition on remote sensing reflectance  

E-Print Network [OSTI]

Impacts of a recurrent resuspension event and variable phytoplankton community composition resuspension event and variable phytoplankton community composition on remote sensing reflectance, J. Geophys shoreline erosion, and high river runoff. These forces lead to significant resuspension of particles, which

330

Pearls of Wisdom : technology for intentional reflection and learning in constructionist cooperatives  

E-Print Network [OSTI]

At the core of the constructionist learning paradigm is the idea that people learn through design experiences. However, in most settings, learners rarely revisit their work to reflect on design and learning processes. The ...

Chapman, Robbin Nicole, 1958-

2006-01-01T23:59:59.000Z

331

Simple radiative transfer model for relationships between canopy biomass and reflectance  

Science Journals Connector (OSTI)

A modified Kubelka-Munk model has been utilized to derive useful equations for the analysis of apparent canopy reflectance. Based on the solution to the model simple working equations...

Park, J K; Deering, D W

1982-01-01T23:59:59.000Z

332

Ultra-Shallow Imaging Using 2D & 3D Seismic Reflection Methods  

E-Print Network [OSTI]

Dome in Brazoria County, Texas, in late 1926 (Weatherby, 1948). A successful discovery well that was drilled based on this information helped the reflection seismograph to gain acceptance. At the time, recording trucks had only one channel...

Sloan, Steven D.

2008-01-01T23:59:59.000Z

333

Increasing Reflection Coherency Through Improved Statics Corrections: An Iterative Tomographic Approach  

E-Print Network [OSTI]

Computation and application of statics corrections have always been problematic on CMP reflection data, especially in highly weathered and structurally altered environments. Tomographic estimation of the velocity field within the weathered layer...

Mayer, Lindsay Michelle

2009-06-09T23:59:59.000Z

334

Multispectral detection of organic residues on poultry processing plant equipment based on hyperspectral reflectance imaging technique  

Science Journals Connector (OSTI)

Diluted organic residues, such as feces, ingesta and other biological substances on poultry processing plant equipment surfaces, not easily discernible by human eye, are potential contamination sources for poultry carcasses. Development of sensitive ... Keywords: Fecal contamination, Hyperspectral, Multispectral, Reflectance image

Byoung-Kwan Cho; Yud-Ren Chen; Moon S. Kim

2007-07-01T23:59:59.000Z

335

The Impact of a Metacognitive Reflection Component in a Problem-Based Learning Unit  

E-Print Network [OSTI]

This mixed methods dissertation explores the impact of metacognitive support (reflective journal entries and a think-aloud exercise) in a PBL (problem-based learning) unit. While students are developing a solution for a PBL unit they may become...

Seifert, Kathryn A.

2010-01-16T23:59:59.000Z

336

Surface Studies by Low-Energy Electron Diffraction and Reflection High-Energy-Electron Diffraction  

Science Journals Connector (OSTI)

In this chapter, we present the basic concepts of the low-energy electron diffraction (LEED) and reflection high-energy electron diffraction (RHEED) experiments. The main goal is to provide an overview of the ...

P. Laukkanen; J. Sadowski; M. Guina

2012-01-01T23:59:59.000Z

337

A 3D-3C Reflection Seismic Survey and Data Integration to Identify...  

Office of Environmental Management (EM)

to Identify the Seismic Response of Fractures and Permeable Zones Over a Known Geothermal Resource at Soda Lake, Churchhill Co., NV A 3D-3C Reflection Seismic Survey and Data...

338

The parametric Doppler effect upon reflection of light from a moving smooth inhomogeneity of a medium  

Science Journals Connector (OSTI)

The reflection of probe radiation from a smooth inhomogeneity of characteristics of a medium that propagates with a relativistic velocity is analyzed. Equations that describe the propagation of forward and bac...

N. N. Rosanov

2012-11-01T23:59:59.000Z

339

Using Visible and Near Infrared Diffuse Reflectance Spectroscopy to Characterize and Classify Soil Profiles  

E-Print Network [OSTI]

solum thicknesses, along with many associated soil properties, an ECa map can be used to employ stratified random sampling to select soil or crop sampling locations (Corwin and Lesch 2005; Johnson et al., 2005). VisNIR Diffuse Reflectance Spectroscopy...

Wilke, Katrina Margarette

2011-10-21T23:59:59.000Z

340

Neutron Diffraction Performance Based on Multiple Reflection Monochromator for High-Resolution Neutron Radiography  

Science Journals Connector (OSTI)

The effects of multiple Bragg reflections in single crystal can be observed when more than one set of planes are simultaneously operative for a given wavelength i.e. when more than two reciprocal lattice point...

Pavel Mikula; Miroslav Vrana

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Super-Resolution ROM Disc Using GeAl Reflective Absorption Layer  

Science Journals Connector (OSTI)

We have developed a super-resolution ROM disc using a newly designed GeAl reflective absorption layer. The optical resolution limit in high readout power expanded more than 1.5 times...

Aoki, Kazuhiko; Tanabe, Hideki; Ohkubo, Shuichi; Kariyada, Eiji; Katayama, Ryuichi; Yamanaka, Yutaka

342

X-ray multilayer characterization using reflectivity beamline at Indus-1  

SciTech Connect (OSTI)

Poor knowledge of optical constants of various materials in the soft x-ray region requires to test the soft x-ray optical devices at actual wavelengths. For such purposes a soft x-ray/vacuum ultraviolet reflectivity beamline has been setup on Indus-1 synchrotron.X-ray multilayer structures are also being developed at RRCAT. Silicon based different multilayer optics fabricated in house for 100-200A ring wavelength region show a very high reflectivity performance. A new multilayer combination comprised of NbC/Si is proposed for achieving good thermal stability high reflectivity in the Si L-edge region. A high reflectivity of 63% in near normal incidence region is obtained with a sputter deposited Mo/Si combination. Results prospects of growing NbC/Si multilayer are presented.

Modi, Mohammed H.; Prasad, T. T.; Nayak, M.; Pothana, N.; Jaiswal, A.; Rai, S. K.; Lodha, G. S. [X-ray Optics Section Raja Ramanna Centre for Advanced Technology (RRCAT) Indore 452013 (India)

2010-06-23T23:59:59.000Z

343

From the Netherlands to PPPL: Student reflects on his study of...  

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

From the Netherlands to PPPL: Student reflects on his study of light August 12, 2013 Tweet Widget Google Plus One Share on Facebook Jasper van Rens (Photo by Elle Starkman PPPL...

344

Design consistency and driver error as reflected by driver workload and accident rates  

E-Print Network [OSTI]

DESIGN CONSISTENCY AND DRIVER ERROR AS REFLECTED BY DRIVER WORKLOAD AND ACCIDENT RATES A Thesis by MARK DOUGLAS WOOLDRIDGE Approved as to style and content by: Daniel B. Fambro (Chair of Committee) Raymond A. Krammes (Member) Olga J.... Pendleton (Member) James T. P. Yao (Head of Department) May 1992 ABSTRACT Design Consistency and Driver Error as Reflected by Driver Workload and Accident Rates (May 1992) Mark Douglas Wooldridge, B. S. , Texas A&M University Chair of Advisory...

Wooldridge, Mark Douglas

2012-06-07T23:59:59.000Z

345

Measurement of multilayer mirror reflectivity and stimulated emission in the XUV spectral region  

SciTech Connect (OSTI)

We present measurements of multilayer mirror reflectivity and stimulated emission in the XUV spectral region. A molybdenum-silicon multilayer mirror with 12% measured reflectivity at 182 A was found to produce a 120% enhancement of the C VI 182 A line (3 ..-->.. 2 transition) in a strongly recombining plasma. No such enhancement of the CV 186.7 A line was seen, demonstrating amplification of stimulated emission at 182 A.

Keane, C.; Nam, C.H.; Meixler, L.; Milchberg, H.; Skinner, C.H.; Suckewer, S.; Voorhees, D.; Barbee, T.

1986-03-01T23:59:59.000Z

346

The estimation of geotechnical properties of marine sediments from their acoustic reflectivity  

E-Print Network [OSTI]

THE ESTIMATION OF GEOTECHNICAL PROPERTIES OF MARINE SEDIMENTS FROM THEIR ACOUSTIC REFLECTIVITY A Thesis by MARTIN EBEL Submitted to the Office of Graduate Studies of Texas AkM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1993 Major Subject: Oceanography THE ESTIMATION OF GEOTECHNICAL PROPERTIES OF MARINE SEDIMENTS FROM THEIR ACOUSTIC REFLECTIVITY A thesis by MARTIN EBEL Submitted to Texas ARM University in partial...

Ebel, Martin

2012-06-07T23:59:59.000Z

347

Comparison between arc drops in ignited thermionic converters with and without ion reflections at the emitter  

SciTech Connect (OSTI)

The output performance of two thermionic energy converters is compared. One converter has a normal emitter, working with zero field at the emitter which is close to the optimum working point, and the other has a low work function emitter and ion reflection at the emitter. A simple model of the plasma and the sheaths shows that a converter working with a low work function emitter and ion reflections gives a worse performance than a similar converter with a normal emitter.

Lundgren, L.

1985-07-01T23:59:59.000Z

348

The effects of experiential learning with an emphasis on reflective writing on deep-level processing of agricultural leadership students  

E-Print Network [OSTI]

are instrumental in the development of students. Experiential learning, and, more importantly, reflective writing are important components of college instructors? repertoires. Learning is not complete without proper reflection. The purpose of this study...

Moore, Copie D.

2010-01-16T23:59:59.000Z

349

Characterization and origins of high-amplitude reflection packets, HARPs, along the Gulf of Mexico depositional profile  

E-Print Network [OSTI]

High amplitude reflection packets (HARPs) refer to sheet-like sand deposits, showing high-amplitude seismic-reflection character, which are thought to be associated with constructional channel systems. Based on observations of Quaternary deposits...

Rains, David Brian

2012-06-07T23:59:59.000Z

350

Room acoustic prediction based on a unified treatment of diffuse and specular reflection  

Science Journals Connector (OSTI)

A new general algorithm for room acoustic prediction is presented. The algorithm based on approximate cone tracing handles diffuse reflection by a splitup of cones incident on diffusing surfaces. The splitup of cones treats the interaction between specular and diffuse reflection in a physically sensible manner. A ‘‘brute?force’’ implementation of such an algorithm inevitably creates an exponential dependence of the calculation time on the number of reflection combinations between diffusely reflecting surfaces and therefore results in extremely long processing times. By exploiting the properties of diffuse reflection the described algorithm displays an essentially linear dependence resulting in processing times short enough also for personal computers. The algorithm adapts its behavior to the properties of each specific environment relies on very few nonverifiable assumptions and is designed to meet the specific requirements of auralization. The splitup of cones creates a myriad of weak diffuse reflections resulting in a very smooth late decay. The algorithm is described in detail and sample predictions are shown.

Bengt?Inge L. Dalenbäck

1996-01-01T23:59:59.000Z

351

Optical Reflection Spectroscopy of Thick Corrosion Layers on 304 Stainless Steel  

SciTech Connect (OSTI)

Corrosion resistant structural materials of both iron and nickel based alloys are used in the electric power industry for the construction of the coolant loops of both conventional and nuclear power generating stations. These materials, in the presence of high temperature (e.g. 287 C), high pH (e.g. 10.0 {at} 20 C) water with dissolved hydrogen will oxidize and form corrosion films that are double metal oxides (or spinels) of the form AB{sub 2}O{sub 4}. This work describes optical reflectivity techniques that have been developed to study the growth of these films in situ. The optical technique uses a dual-beam specular reflection spectrometer to measure the spectrum of reflected light in small angle (i.e. < 15{sup o}) scatter. The reflection spectra are then calibrated using a set of corrosion coupons with corrosion films that are well known. Results are compared with models based on multilayer reflection and Mie scattering from a particle size distribution. Surface roughness is found to be the dominant cause of reduced reflection as the films grow.

R Castelli; P Persans; W Strohmayer; V Parkinson

2006-03-23T23:59:59.000Z

352

Study of Reflected Shock Wave Perturbations at the Central Axis of Dense Plasma Column in a Plasma Focus  

Science Journals Connector (OSTI)

When the shock front (SF) hits the central axis of plasma focus device, a reflected shock moves radially outwards...

Morteza Habibi

2011-12-01T23:59:59.000Z

353

Measuring solar reflectance-Part I: Defining a metric that accurately  

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

solar reflectance-Part I: Defining a metric that accurately solar reflectance-Part I: Defining a metric that accurately predicts solar heat gain Title Measuring solar reflectance-Part I: Defining a metric that accurately predicts solar heat gain Publication Type Journal Article Year of Publication 2010 Authors Levinson, Ronnen M., Hashem Akbari, and Paul Berdahl Journal Solar Energy Volume 84 Pagination 1717-1744 Keywords Heat Island, Methods & Protocols Abstract Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective "cool colored" surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland US latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope 5:12 [23°]) by as much as 89 W m-2, and underestimate its peak surface temperature by up to 5 K. Using RE891BN to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool roof net energy savings by as much as 23%.

354

Release Path Temperatures of Shock-Compressed Tin from Dynamic Reflectance and Radiance Measurements  

SciTech Connect (OSTI)

Dynamic reflectance and radiance measurements were conducted for tin samples shock compressed to 35 GPa and released to 15 GPa using high explosives. We determined the reflectance of the tin samples glued to lithium fluoride windows using an integrating sphere with an internal xenon flashlamp as an illumination source. The dynamic reflectance (R) was determined at near normal incidence in four spectral bands with coverage in visible and near-infrared spectra. Uncertainties in R/R0 are < 2%, and uncertainties in absolute reflectance are < 5%. In complementary experiments, thermal radiance from the tin/glue/lithium fluoride interface was recorded with similar shock stress and spectral coverage as the reflectance measurements. The two sets of experiments were combined to obtain the temperature history of the tin surface with an uncertainty of < 2%. The stress at the interface was determined from photonic Doppler velocimetry and combined with the temperatures to obtain temperature-stress release paths for tin. We discuss the relationship between the experimental release paths and release isentropes that begin on the principal shock Hugoniot.

La Lone, B. M. [NSTec; Stevens, G. D. [NSTec; Turley, W. D. [NSTec; Holtkamp, D. B. [LANL; Iverson, A. J. [NSTec; Hixson, R. S. [NSTec; Veeser, L. R. [NSTec

2013-08-01T23:59:59.000Z

355

A boundary element solution for a mode conversion study on the edge reflection of Lamb waves  

Science Journals Connector (OSTI)

The boundary element method well known for bulk wave scattering is extended to study the mode conversion phenomena of Lamb waves from a free edge. The elastodynamic interior boundary value problem is formulated as a hybrid boundary integralequation in conjunction with the normal mode expansion technique based on the Lamb wave dispersion equation. The present approach has the potential of easily handling the geometrical complexity of general guided wave scattering with improved computational efficiency due to the advantage of the boundary?type integral method. To check the accuracy of the boundary element program vertical shear wave diffraction due to a circular hole is solved and compared with previous analytical solutions. Edge reflection factors for the multibackscattered modes in a steel plate are satisfied quite well with the principle of energy conservation. In the cases of A0 A1 and S0 incidence the variations of the multireflection factors show similar tendencies to the existing results for glass. It is observed that the reflection of an incident wave becomes close to zero over a certain frequency range seen through energy interaction with other reflected modes and increases again beyond this minimum point due to reverse mode conversion. The reflections of the higher symmetric incident modes S1 and S2 are also investigated. It turns out that S1 mode is an unusual mode which is nearly unaffected by the mode conversion in the Lamb wave edge reflection.

Younho Cho; Joseph L. Rose

1996-01-01T23:59:59.000Z

356

Reflection Survey At Rye Patch Area (Deangelo, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Deangelo, Et Al., 1999) Deangelo, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Rye Patch Area (Deangelo, Et Al., 1999) Exploration Activity Details Location Rye Patch Area Exploration Technique Reflection Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes A 3-D seismic survey was recorded over Rye Patch geothermal field in northwest Nevada by Subsurface Exploration Company (SECO) of Pasadena, California, in 1998 (Fig. 27). This 3-D seismic data acquisition was done under the auspices of a research effort d References M. DeAngelo, B.A. Hardage, J. L. Simmons Jr. (1999) Development Of Active Seismic Vector-Wavefield Imaging Technology For Geothermal Applications Retrieved from "http://en.openei.org/w/index.php?title=Reflection_Survey_At_Rye_Patch_Area_(Deangelo,_Et_Al.,_1999)&oldid=388047"

357

Working Toward a Tech Sector that Reflects America | Department of Energy  

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

Working Toward a Tech Sector that Reflects America Working Toward a Tech Sector that Reflects America Working Toward a Tech Sector that Reflects America February 1, 2013 - 1:51pm Addthis Tech-ies mingled during a networking session after the White House Tech Inclusion Summit on January 31, 2013. (Photo credit: John Werner) Tech-ies mingled during a networking session after the White House Tech Inclusion Summit on January 31, 2013. (Photo credit: John Werner) Valerie Jarrett Senior Advisor to President Barack Obama Editor's Note: This blog was orginially published on whitehouse.gov Yesterday, I had the pleasure of speaking at the Technology Inclusion Summit, hosted by Chief Technology Officer Todd Park, the Office of Science and Technology Policy, and the Level Playing Field Institute. It was an amazing gathering of private and public partners who are united in their

358

Reflection Survey At Rye Patch Area (Laney, 2005) | Open Energy Information  

Open Energy Info (EERE)

Reflection Survey At Rye Patch Area (Laney, 2005) Reflection Survey At Rye Patch Area (Laney, 2005) Exploration Activity Details Location Rye Patch Area Exploration Technique Reflection Survey Activity Date Usefulness useful DOE-funding Unknown Notes Seismic Imaging, Majer, Gritto and Daley. The project objective includes the development and application of active seismic methods for improved understanding of the subsurface structure, faults, fractures lithology, and fluid paths in geothermal reservoirs. While the objective of the work previous to FY2003 was concerned with the detection and location of faults and fractures based on an existing 3-D seismic data set collected at the Rye Patch geothermal reservoir, the current work was aimed at investigating how the presence of discrete models of fault and fracture zones can be

359

Reflection Survey At Rye Patch Area (Feighner, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Feighner, Et Al., 1999) Feighner, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Rye Patch Area (Feighner, Et Al., 1999) Exploration Activity Details Location Rye Patch Area Exploration Technique Reflection Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes Because the results of the VSP indicated apparent reflections, TGI proceeded with the collection of 3.0 square miles of 3-D surface seismic data over the Rye Patch reservoir. The data acquisition (which included the use of LBNL's three-component high temperature borehole geophone in well 44-28) was accomplished in August 1998. Initial processed results provided by the subcontractor Subsurface Exploration Co. (SECO) were delivered to TGI in December 1998. After the initial analysis of SECO's results, it was

360

Oak Ridge Reflects on 30 Years of Cleanup | Department of Energy  

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

Reflects on 30 Years of Cleanup Reflects on 30 Years of Cleanup Oak Ridge Reflects on 30 Years of Cleanup May 30, 2013 - 12:00pm Addthis Oak Ridge Office (ORO) of EM Deputy Manager Sue Cange, left to right, former ORO Manager Jim Hall, former ORO Manager Joe LaGrone, former ORO Manager Gerald Boyd, EM Senior Advisor Dave Huizenga and ORO EM Manager Mark Whitney take the stage after the showing of “30 Years in 30 Minutes.” Oak Ridge Office (ORO) of EM Deputy Manager Sue Cange, left to right, former ORO Manager Jim Hall, former ORO Manager Joe LaGrone, former ORO Manager Gerald Boyd, EM Senior Advisor Dave Huizenga and ORO EM Manager Mark Whitney take the stage after the showing of "30 Years in 30 Minutes." Displays at the event provide timelines and accomplishments of Oak Ridge’s EM program.

Note: This page contains sample records for the topic "reflection radiometer aster" 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

GAO Report Reflects Success Story for EM Sites | Department of Energy  

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

GAO Report Reflects Success Story for EM Sites GAO Report Reflects Success Story for EM Sites GAO Report Reflects Success Story for EM Sites March 28, 2013 - 12:00pm Addthis Scrapers excavate the Crescent Junction disposal cell 25 feet below ground surface. Scrapers excavate the Crescent Junction disposal cell 25 feet below ground surface. In a report released earlier this year, the U.S. Government Accountability Office (GAO) said it recognized progress on EM projects of $750 million or less and was shifting the focus of EM's high-risk designation more to major contracts and projects greater than $750 million. This progress is evident at several EM sites. In 2009, workers completed significant infrastructure construction at EM's Moab site at a cost of about $39.3 million, under the estimated budget of $40.7 million, and within schedule.

362

Observed Surface Reflectance Distributions in the Southern Great Plains During ALIVE  

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

Surface Reflectance Distributions Surface Reflectance Distributions in the Southern Great Plains During ALIVE Kirk Knobelspiesse 1 , Brian Cairns 1 , Andrew Lacis 2 , Mikhail Alexandrov 2 , Barbara Carlson 2 and Beat Schmid 3 1 Department of Applied Physics and Applied Mathematics, Columbia University 2 NASA Goddard Institute for Space Studies 3 Pacific Northwest National Laboratory * Surface albedo can be measured from the ground with broadband instruments. * Albedo can be measured from space if the atmospheric effect is removed and many view geometries are available. The measured Bidirectional Reflectance Distribution Function (BRDF) is angularly integrated to compute the albedo. * Studies of the former (Yang, 2006) and the latter (Liang et al. 2005; Wang et al. 2006) do not always agree.

363

An effective medium study of surface plasmon polaritons in nanostructured gratings using attenuated total reflection  

SciTech Connect (OSTI)

Recent work studied surface plasmon resonances in structured materials by the method of attenuated total reflection using a prism on top of a metallic grating. That calculation considered Transverse Magnetic polarized radiation, involved an expansion in 121 Fourier modes, and found a number of interesting features. Many of these features were attributed to localized plasmons or other factors, which arise from a discrete structure. We use a simple effective medium theory to address the same problem, and find many of the same reflection features observed in the more complex calculation, indicating that localization is not an important factor. We also evaluate the possibility of using some of the new features in the reflection spectrum for bio-sensing and find that the sensitivity of the system to small changes in relative permittivity is increased compared to some standard methods.

Tyboroski, M. H.; Anderson, N. R.; Camley, R. E. [UCCS BioFrontiers Center, University of Colorado at Colorado Springs, Colorado Springs, Colorado 80918 (United States)

2014-01-07T23:59:59.000Z

364

Photothermal and thermo-refractive effects in high reflectivity mirrors at room and cryogenic temperature  

E-Print Network [OSTI]

Increasing requirements in the sensitivity of interferometric measurements is a common feature of several research fields, from gravitational wave detection to quantum optics. This motivates refined studies of high reflectivity mirrors and of noise sources that are tightly related to their structure. In this work we present an experimental characterization of photothermal and thermo-refractive effects in high reflectivity mirrors, i.e., of the variations in the position of their effective reflection plane due to weak residual power absorption. The measurements are performed by modulating the impinging power in the range 10 Hz $\\div$ 100 kHz. The experimental results are compared with an expressly derived theoretical model in order to fully understand the phenomena and exploit them to extract useful effective thermo-mechanical parameters of the coating. The measurements are extended at cryogenic temperature, where most high sensitivity experiments are performed (or planned in future versions) and where characterizations of dielectric film coatings are still poor.

Alessandro Farsi; Mario Siciliani de Cumis; Francesco Marino; Francesco Marin

2011-09-21T23:59:59.000Z

365

Chemical selective microstructural analysis of thin film using resonant x-ray reflectivity  

SciTech Connect (OSTI)

Strong modulations of the reflected x-ray intensities near the respective absorption edges of the constituent materials promise to determine layer composition of thin film structures along with spectroscopic like information. Near the absorption edge, the orders of magnitude more contrast beyond the pure electron density distributions of materials find an approach to overcome the low density difficulty of the conventional x-ray reflectivity technique. These aspects are explained by experimental studies on partially decomposed boron nitride thin films. Chemical composition profile is determined from free surface to the embedded buried layer with depth resolution in nanometer scale. The results of resonant reflectivity for chemical analysis are correlated with depth dependent x-ray photo electron spectroscopy.

Nayak, Maheswar; Lodha, G. S. [X-ray Optics Section, Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh (India)

2013-07-14T23:59:59.000Z

366

Simulations of reflected radio signals from cosmic ray induced air showers  

E-Print Network [OSTI]

We present the calculation of coherent radio pulses emitted by extensive air showers induced by ultra-high energy cosmic rays accounting for reflection on the Earth's surface. Results have been obtained with a simulation program that calculates the contributions from shower particles after reflection at a surface plane. The properties of the radiation are discussed in detail emphasizing the effects of reflection. The shape of the frequency spectrum is shown to be closely related to the angle of the observer with respect to shower axis, becoming hardest in the Cherenkov direction. The intensity of the flux at a fixed observation angle is shown to scale with the square of the primary particle energy to very good accuracy indicating the coherent aspect of the emission. The simulation methods of this paper provide the foundations for energy reconstruction of experiments looking at the Earth from balloons and satellites. They can also be used in dedicated studies of existing and future experimental proposals.

Alvarez-Muñiz, Jaime; García-Fernández, Daniel; Schoorlemmer, Harm; Zas, Enrique

2015-01-01T23:59:59.000Z

367

Reflection of electromagnetic waves from mixtures of plane gravitational and scalar waves  

E-Print Network [OSTI]

We consider colliding wave packets consisting of hybrid mixtures of electromagnetic, gravitational and scalar waves. Irrespective of the scalar field, the electromagnetic wave still reflects from the gravitational wave. Some reflection processes are given for different choice of packets in which the Coulomb-like component $\\Psi_2$ vanishes. Exact solution for multiple reflection of an electromagnetic wave from successive impulsive gravitational waves is obtained in a closed form. It is shown that a succesive sign flip in the Maxwell spinor arises as a result of encountering with an impulsive train (i.e. the Dirac's comb curvature) of gravitational waves. Such an observable effect may be helpful in the detection of gravitational wave bursts.

Ozay Gurtug; Mustafa Halilsoy; Ozlem Unver

2006-08-22T23:59:59.000Z

368

Enhancement of phase-conjugate reflectivity using Zeeman coherence in highly degenerate molecular systems  

SciTech Connect (OSTI)

A comprehensive theoretical analysis is developed for the vectorial phase conjugation using resonant four-wave mixing (FWM) in a highly degenerate rotational vibrational molecular system. The dynamic Stark shifts, saturation, and Doppler broadening are included for a realistic analysis. It is shown that the electromagnetically induced multilevel coherence controls the nonlinear wave mixing yielding interesting results for the phase conjugate (PC) reflectivity. It turns out that the efficiency of the PC reflectivity is decided by the relative phase of the Zeeman coherence and the population grating. When these two contributions are aligned in phase by a small detuning of the pump frequency, a large PC reflectivity (approx20%) is obtained with moderate pump intensity (approx500 mW/cm{sup 2}).

Mukherjee, Nandini [Department of Physics and Astronomy, University of California, Los Angeles, California 90095 (United States)

2010-01-15T23:59:59.000Z

369

Reflection resonances in surface-disordered waveguides: strong higher-order effects of the disorder  

E-Print Network [OSTI]

We study coherent wave scattering through waveguides with a step-like surface disorder and find distinct enhancements in the reflection coefficients at well-defined resonance values. Based on detailed numerical and analytical calculations, we can unambiguously identify the origin of these reflection resonances to be higher-order correlations in the surface disorder profile which are typically neglected in similar studies of the same system. A remarkable feature of this new effect is that it relies on the longitudinal correlations in the step profile, although individual step heights are random and thus completely uncorrelated. The corresponding resonances are very pronounced and robust with respect to ensemble averaging, and lead to an enhancement of wave reflection by more than one order of magnitude.

J. Doppler; J. A. Méndez-Bermúdez; J. Feist; O. Dietz; D. O. Krimer; N. M. Makarov; F. M. Izrailev; S. Rotter

2013-12-28T23:59:59.000Z

370

Molecular orientation in soft matter thin films studied by resonant soft X-ray reflectivity  

SciTech Connect (OSTI)

We present a technique to study depth profiles of molecular orientation in soft matter thin films with nanometer resolution. The method is based on dichroism in resonant soft X-ray reflectivity using linear s- and p-polarization. It combines the chemical sensitivity of Near-Edge X-ray Absorption Fine Structure spectroscopy to specific molecular bonds and their orientation relative to the polarization of the incident beam with the precise depth profiling capability of X-ray reflectivity. We demonstrate these capabilities on side chain liquid crystalline polymer thin films with soft X-ray reflectivity data at the carbon K edge. Optical constants of the anisotropic refractive index ellipsoid were obtained from a quantitative analysis using the Berreman formalism. For films up to 50 nm thickness we find that the degree of orientation of the long axis exhibits no depth variation and isindependent of the film thickness.

Mezger, Markus; Jerome, Blandine; Kortright, Jeffrey B.; Valvidares, Manuel; Gullikson, Eric; Giglia, Angelo; Mahne, Nicola; Nannarone, Stefano

2011-01-12T23:59:59.000Z

371

Working Toward a Tech Sector that Reflects America | Department of Energy  

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

Working Toward a Tech Sector that Reflects America Working Toward a Tech Sector that Reflects America Working Toward a Tech Sector that Reflects America February 1, 2013 - 1:51pm Addthis Tech-ies mingled during a networking session after the White House Tech Inclusion Summit on January 31, 2013. (Photo credit: John Werner) Tech-ies mingled during a networking session after the White House Tech Inclusion Summit on January 31, 2013. (Photo credit: John Werner) Valerie Jarrett Senior Advisor to President Barack Obama Editor's Note: This blog was orginially published on whitehouse.gov Yesterday, I had the pleasure of speaking at the Technology Inclusion Summit, hosted by Chief Technology Officer Todd Park, the Office of Science and Technology Policy, and the Level Playing Field Institute. It was an amazing gathering of private and public partners who are united in their

372

Reflecting Microscopes  

Science Journals Connector (OSTI)

... at the Physical Society's Exhibition in 1939. I used non-spherical mirror-pairs, Schwarzschild aplanats2,3, for a reason which may prove important if it is desired to ... above 0*2, and should preferably be lower.

C. R. BURCH

1943-12-25T23:59:59.000Z

373

Passivating overcoat bilayer for multilayer reflective coatings for extreme ultraviolet lithography  

DOE Patents [OSTI]

A passivating overcoat bilayer is used for multilayer reflective coatings for extreme ultraviolet (EUV) or soft x-ray applications to prevent oxidation and corrosion of the multilayer coating, thereby improving the EUV optical performance. The overcoat bilayer comprises a layer of silicon or beryllium underneath at least one top layer of an elemental or a compound material that resists oxidation and corrosion. Materials for the top layer include carbon, palladium, carbides, borides, nitrides, and oxides. The thicknesses of the two layers that make up the overcoat bilayer are optimized to produce the highest reflectance at the wavelength range of operation. Protective overcoat systems comprising three or more layers are also possible.

Montcalm, Claude (Livermore, CA); Stearns, Daniel G. (Los Altos, CA); Vernon, Stephen P. (Pleasanton, CA)

1999-01-01T23:59:59.000Z

374

Standoff reflection–absorption spectra of surface adsorbed explosives measured with pulsed quantum cascade lasers  

Science Journals Connector (OSTI)

Abstract We demonstrate a standoff detection scheme of surface adsorbed explosives based on the broadband quantum cascade laser (QCL) infrared reflection–absorption spectroscopy and ultraviolet laser photodecomposition. We utilized a sub-second rapid-scan data acquisition scheme to record continuously scanned spectra which revealed the broad-band absorption features of surface adsorbed explosive molecules such as cyclotrimethylene trinitramine (RDX) and trinitrotoluene with a surface concentration of 1 ?g/cm2. The standoff QCL spectra perfectly reproduce the reflectance spectra obtained with a conventional Fourier transform infrared spectroscopy instrument. The conformation conversion of RDX molecules is also observed and studied.

Xunchen Liu; Charles W. Van Neste; Manisha Gupta; Ying Y. Tsui; Seonghwan Kim; Thomas Thundat

2014-01-01T23:59:59.000Z

375

Applications of beamforming and acoustic holography in an anechoic tank with surface reflections  

Science Journals Connector (OSTI)

Recently our institute KRISO/KORDI constructed a small anechoic tank which has an anechoic lining at the four walls and bottom. Because surface reflections still occur special care must be taken for acoustic measurements and array signal processing for example source localization and acoustic holography. In this paper the effects of the surface reflections to the array signal processing methods are investigated. First estimated errors by both methods are analyzed for various measurement parameters. Beamforming experiments with vertical line arrays are performed. Holographic reconstruction of simple and complex acoustic sources is also performed to compare the true and estimated results.

2004-01-01T23:59:59.000Z

376

Detecting voids in a 0.6 m coal seam, 7 m deep, using seismic reflection  

E-Print Network [OSTI]

Surface collapse over abandoned subsurface coal mines is a problem in many parts of the world. High-resolution P-wave reflection seismology was successfully used to evaluate the risk of an active sinkhole to a main north-south ...

Miller, Richard D.; Steeples, Don W.

1991-01-01T23:59:59.000Z

377

Traveltime approximation for a reflected wave in a homogeneous anisotropic elastic layer  

Science Journals Connector (OSTI)

......reflected wave in a homogeneous anisotropic elastic layer M. Zillmer...A review of wave motion in anisotropic and cracked elastic-media...1995. Seismic anisotropy of shales, J. geophys. Res., 100...body waves in arbitrarily anisotropic media, in, Propagation of......

M. Zillmer; B. M. Kashtan

2002-10-01T23:59:59.000Z

378

Anisotropic geometrical-spreading correction for wide-azimuth P-wave reflections  

E-Print Network [OSTI]

Anisotropic geometrical-spreading correction for wide-azimuth P-wave reflections Xiaoxia Xu1 spreading in stratified azi- muthally anisotropic media. The P-wave geometrical-spreading factor systems, nonhydrostatic stresses, or dipping trans- versely isotropic layers e.g., shales . The inversion

Tsvankin, Ilya

379

Fluorescence of coral larvae predicts their settlement response to crustose coralline algae and reflects stress  

Science Journals Connector (OSTI)

...1797, Australia Multi-coloured homologues...prominence in reef-building corals and widespread...of the larval family emerged as a predictor...of the reef-building corals. IV...reflects stress. | Multi-coloured homologues...prominence in reef-building corals and widespread...of the larval family emerged as a predictor...

2011-01-01T23:59:59.000Z

380

Roughening of a smooth cold Ag surface by Ag overlayers studied by differential reflectivity  

E-Print Network [OSTI]

L- 99 Roughening of a smooth cold Ag surface by Ag overlayers studied by differential reflectivity. The modifications of the optical properties due to the roughening of the surface are analysed, the annealing of the optical properties due to the early roughening of thesurface, we investigate the annealing

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "reflection radiometer aster" 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

MDE and Mobile agents: another reflection on the agent migration Tahar GHERBI  

E-Print Network [OSTI]

MDE and Mobile agents: another reflection on the agent migration Tahar GHERBI Computer science code. Mobile agents are a very interesting technology to develop applications for mobile and distributed environments. A mobile agent is essentially a computer program that acts autonomously on behalf

Paris-Sud XI, Université de

382

Philosophy enables us to reflect on questions of who we are and  

E-Print Network [OSTI]

Philosophy Philosophy enables us to reflect on questions of who we are and how we should live. It is crucial to intelligent decision making in all spheres of life. Students of philosophy have made important contributions to life across the spectrum of occupations. www.uwindsor.ca/philosophy Studying philosophy

383

Reflection high-energy electron diffraction from carbon nanotubes Jason T. Drotar,1  

E-Print Network [OSTI]

Reflection high-energy electron diffraction from carbon nanotubes Jason T. Drotar,1 B. Q. Wei,2 Y of the nanotubes was determined, from the energy-loss spectrum, to be 52 12 nm. DOI: 10.1103/PhysRevB.64-walled carbon nanotubes using reflec- tion high-energy electron diffraction RHEED .9 However, it should

Wang, Gwo-Ching

384

Characterization of material degradation in ceramic matrix composites using infrared reflectance spectroscopy  

SciTech Connect (OSTI)

Ceramic matrix composite materials for thermal protection systems are required to maintain operational performance in extreme thermal and mechanical environments. In-service inspection of materials capable of assessing the degree and extent of damage and degradation will be required to ensure the safety and readiness of future air vehicles. Infrared reflectance spectroscopy is an established material characterization technique capable of extracting information regarding the chemical composition of substances. The viability of this technique as a potentially powerful nondestructive evaluation method capable of monitoring degradation in thermal protection system materials subjected to extreme mechanical and thermal environments is analyzed. Several oxide-based and non-oxide-based ceramic matrix composite materials were stressed to failure in a high temperature environment and subsequently measured using infrared reflectance spectroscopy. Spectral signatures at locations along the length of the samples were compared resulting in distinct and monotonic reflectance peak changes while approaching the fracture point. The chemical significance of the observed signatures and the feasibility of infrared reflectance nondestructive evaluation techniques are discussed.

Cooney, Adam T.; Flattum-Riemers, Richard Y. [Air Force Research Laboratory, Materials and Manufacturing Directorate, NonDestructive Evaluation Branch, Wright-Patterson AFB, OH (United States); Scott, Benjamin J. [Universal Technology Corporation, Dayton, OH (United States)

2011-06-23T23:59:59.000Z

385

Cryogenic Yb:YAG Total-Reflection Active-Mirror Lasers  

Science Journals Connector (OSTI)

A regenerative amplifier with a cryogenic Yb:YAG total-reflection active-mirror shows 3.5mJ at 100Hz with M2<1.1. A high energy fluence of 2.6J/cm2 energy fluence is achieved for...

Kawanaka, Junji; Furuse, Hiroaki; Albach, Daniel; Takeuchi, Yasuki; Yoshida, Akira; Kawashima, Toshiyuki; Kan, Hirofumi

386

Neutron Reflectivity Study of Lipid Membranes Assembled on Ordered Nanocomposite and Nanoporous Silica Thin  

E-Print Network [OSTI]

moleculestrappedwithinthenanocompositethinfilmmay be used to detect trans-membrane transport (e.g., ion channel function). Furthermore, the ability in facilitating molecular transport across the membrane plane. In this regard, the use of ultrathin polymericNeutron Reflectivity Study of Lipid Membranes Assembled on Ordered Nanocomposite and Nanoporous

Parikh, Atul N.

387

Extraction of the seabed reflectivity function using ice cracking noise as a signal source  

Science Journals Connector (OSTI)

A technique is described for measuring the reflection coefficient of the Arctic seabed with a single vertical array of hydrophones. Naturally occurring icecrackingnoises were used as the acoustic sources. This method circumvents the difficulties and expense of introducing artificial sound sources through the thick Arctic pack ice. The measurements were made in April 1988 with a 22?element array suspended from the ice in 420 m of water. The range of the source is first determined using the direct arrival and multiple reflections from the seabed and underice surface. Then the source directivity is parametrized using the direct arrival path only and extrapolated to reflected path angles. A plot of the reflection coefficient versus grazing angle clearly indicates the value of the critical angle. The sound speed of the sea bottom corresponding to this critical angle agrees well with that measured from a bottom grab sample taken during the field trip. Finally an interesting phenomenon was an anomalous increase of the received pressure level around a grazing angle of 60°. This is associated with a leaky plate wave radiating at the ice–water interface.

Pierre Zakarauskas; Ronald I. Verrall; Michael V. Greening

1993-01-01T23:59:59.000Z

388

Former Assistant Secretary Reflects on Career High Point Leading EM: 'Well Worth the Effort'  

Broader source: Energy.gov [DOE]

WASHINGTON, D.C. – In an occasional EM Update series, we feature interviews with former EM Assistant Secretaries to reflect on their achievements and challenges in the world’s largest nuclear cleanup and to discuss endeavors in life after EM.

389

X-ray reflection in the NLS1 1H 0707-495  

E-Print Network [OSTI]

We apply a reflection-dominated model to the second XMM-Newton observation of the Narrow Line Seyfert 1 galaxy 1H 0707-495. As in the first XMM-Newton observation a sharp spectral drop is detected with energy that has shifted from 7 keV to 7.5 keV in two years. The drop is interpreted in terms of relativistically blurred ionised reflection from the accretion disc, while the energy shift can be accounted for by changes in the ionisation state and, more importantly, emissivity profile on the disc. A flatter emissivity profile during the second higher flux observation reduces gravitational redshift effects, therefore shifting the edge to higher energy. Remarkably, ionised disc reflection and the associated power law continuum provide a reasonable description of the broadband spectrum, including the soft excess. Considering both observations, the spectral variability in 1H 0707-495 appears to be due to the interplay between these two spectral components. The reflection component in the second observation is significantly less variable than the power law. Changes of the emissivity profile, spectral shape and variability properties (such as the rms spectrum) within the two observations are all consistent with a recently proposed model in which relativistic effects in the very inner regions of the nucleus play a major role.

A. C. Fabian; G. Miniutti; L. Gallo; Th. Boller; Y. Tanaka; S. Vaughan; R. R. Ross

2004-05-07T23:59:59.000Z

390

Measured Energy Savings from the Application of Reflective Roofs in 3 AT&T Regeneration Buildings  

E-Print Network [OSTI]

) under IAG No. DW89938442-01-2, and by the Assistant Secretary for Energy Efficiency and Renew- ableLBNL-47075 Measured Energy Savings from the Application of Reflective Roofs in 3 AT&T Regeneration Buildings Hashem Akbari and Leo Rainer Heat Island Group Lawrence Berkeley National Laboratory Berkeley, CA

391

Diffraction and external reflection by dielectric faceted particles Lei Bi a,, Ping Yang b  

E-Print Network [OSTI]

approximate methods; the surface-integral method (SIM), the volume-integral method (VIM), and the diffraction matrix in the SIM and the VIM are presented in an explicit form. Of interest is that diffraction and external reflection are separable in the SIM, whereas they are combined in the VIM. A feature of zero

Baum, Bryan A.

392

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS G(e, 1, n)  

E-Print Network [OSTI]

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS G(e, 1, n.Introduction Green polynomials Q~~(q) of GLn(Fq), where ~, ~ are partitions of n, were fi* *rst introduced by J.A.Green [G] in 1955 in a combinatorial framework of symmetric f* *unc- tions

Shoj, Toshiaki

393

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS G(e, 1, n)  

E-Print Network [OSTI]

GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS G(e, 1, n) TOSHIAKI SHOJI Department of Mathematics Science University of Tokyo Noda, Chiba 278­8510, Japan 0. Introduction Green polynomials Q µ # (q) of GL n (F q ), where #, µ are partitions of n, were first introduced by J.A.Green [G] in 1955

Shoj, Toshiaki

394

Green's function retrieval from reflection data, in absence of a receiver at the virtual source position  

E-Print Network [OSTI]

Green's function retrieval from reflection data, in absence of a receiver at the virtual source; accepted 6 March 2014) The methodology of Green's function retrieval by cross-correlation has led to many, a virtual source is created at the position of a receiver. Here a method is discussed for Green's function

Snieder, Roel

395

Sequence variations in the public human genome data reflect a bottlenecked population history  

E-Print Network [OSTI]

. Redundant coverage in overlaps of large-insert genomic clones, sequenced as part of the Human Genome ProjectSequence variations in the public human genome data reflect a bottlenecked population history Gabor-nucleotide polymorphisms (SNPs) constitute the great ma- jority of variations in the human genome, and as heritable

Hahn, Mark E.

396

Infrared reflectance and transmission spectra in II-VI alloys and superlattices  

E-Print Network [OSTI]

Room temperature measurements of the far-infrared (FIR) reflectance spectra are reported for the polar optical phonons in a series of bulk Cd[subscript x]Zn[subscript 1?x]Te (0 ? x ? 1) and CdSe[subscript x]Te[subscript ...

Talwar, Devki N.

397

Vitrinite recycling: diagnostic criteria and reflectance changes during weathering and reburial  

E-Print Network [OSTI]

Vitrinite recycling: diagnostic criteria and reflectance changes during weathering and reburial P CNRS, Université d'Orléans, Bâtiment de Géosciences, 45067 Orléans cedex 2, France Keywords: Recycled to distinguish recycled and autochthonous vitrinite particles and, second, to examine and try to explain

Boyer, Edmond

398

Determining the Density Profile of Confined Polymer Brushes with Neutron Reflectivity  

E-Print Network [OSTI]

, University of South Florida, Florida 33620 3 Manuel Lujan Jr. Neutron Scattering Center, LANSCE-12, MS H805Determining the Density Profile of Confined Polymer Brushes with Neutron Reflectivity W. A. HAMILTON,1 G. S. SMITH,1 N. A. ALCANTAR,2 J. MAJEWSKI,3 R. G. TOOMEY,4 T. L. KUHL5 1 Center for Neutron

Kuhl, Tonya L.

399

First-order design of off-axis reflective ophthalmic adaptive optics systems using afocal  

E-Print Network [OSTI]

First-order design of off-axis reflective ophthalmic adaptive optics systems using afocal for designing laser cavities, spectrographs and adaptive optics retinal imaging systems. The use, range respectively. This is discussed using examples from adaptive optics retinal imaging systems. The performance

400

Ultra-low reflection porous silicon nanowires for solar cell applications  

E-Print Network [OSTI]

Ultra-low reflection porous silicon nanowires for solar cell applications A. Najar,1, * J. Charrier aligned Porous Silicon NanoWires (PSiNWs) were fabricated on silicon substrate using metal assisted a great potential to be utilized in radial or coaxial p-n heterojunction solar cells that could provide

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Transmission, attenuation and reflection of shear waves in the human brain  

Science Journals Connector (OSTI)

...reflection of shear waves in the human brain Erik H. Clayton 1 * Guy M. Genin 1 Philip...1185, St Louis, MO 63130, USA Traumatic brain injuries (TBIs) are caused by acceleration...methods to measure the motion of the human brain in vivo as the skull was exposed to harmonic...

2012-01-01T23:59:59.000Z

402

EFFECT OF THE HADLEY CIRCULATION ON THE REFLECTION OF PLANETARY WAVES IN THREE-DIMENSIONAL  

E-Print Network [OSTI]

EFFECT OF THE HADLEY CIRCULATION ON THE REFLECTION OF PLANETARY WAVES IN THREE-equation model that includes a representation of the Hadley circulation. The Hadley circulation is forced symmetric component of the ow. To quantify the e#11;ect of the Hadley circulation on wave propagation

Magnusdottir, Gudrun

403

FDM Helmholtz modeling of finite grating and waveguide width effects on resonant subwavelength grating reflectivity.  

SciTech Connect (OSTI)

Resonant subwavelength gratings (RSGs) may be used as narrow-band wavelength and angular reflectors. Rigorous coupled wave analysis (RCWA) predicts 100% reflectivity at the resonant frequency of an incident plane wave from an RSG of infinite extent. For devices of finite extent or for devices illuminated with a finite beam, the peak reflectivity drops, coupled with a broadening of the peak. More complex numerical methods are required to model these finite effects. We have modeled finite devices and finite beams with a two-dimensional finite difference Helmholtz equation. The effect of finite grating aperture and finite beam size are investigated. Specific cases considered include Gaussian beam illumination of an infinite grating, Gaussian illumination of a finite grating, and plane wave illumination of an apertured grating. For a wide grating with a finite Gaussian beam, it is found that the reflectivity is an exponential function of the grating width. Likewise, for an apertured grating the reflectivity shows an exponential decay with narrowing aperture size. Results are compared to other methods, including plane wave decomposition of Gaussian beams using RCWA for the case of a finite input beam, and a semi-analytical techniques for the case of the apertured grating.

Kemme, Shanalyn A.; Peters, David William; Hadley, G. Ronald

2003-07-01T23:59:59.000Z

404

Reflection of Nonlinear Acoustic Waves from the Mechanically Free Surface of an Unconsolidated Granular Medium  

E-Print Network [OSTI]

1 Reflection of Nonlinear Acoustic Waves from the Mechanically Free Surface of an Unconsolidated a mechanically free surface of an unconsolidated granular layer under gravity is solved analytically using of the acoustic experiments directed to the investigation of fundamental mechanical properties of unconsolidated

Paris-Sud XI, Université de

405

Assessment of crustal velocity models using seismic refraction and reflection tomography  

Science Journals Connector (OSTI)

......on the method of Hole Zelt (1995). A flat starting model is used and, as with the...over 80 km distance centred beneath the Rocky Mountain Trench in the Foreland Belt...American Cordillera reflection refraction Rocky Mountain Trench seismic methods South America......

Colin A. Zelt; Kalachand Sain; Julia V. Naumenko; Dale S. Sawyer

2003-06-01T23:59:59.000Z

406

V-band Transmission and Reflection Grid Amplifier Packaged in Waveguide  

E-Print Network [OSTI]

for thermal management by allowing the heat sink to be mounted on one side of the grid array. It also reduces and cooling fan were used to remove heat from the chip. The temperature distribution across the grid aperture1 V-band Transmission and Reflection Grid Amplifier Packaged in Waveguide Chun-Tung Cheung1 , Roger

407

Movement of oxygen vacancies in oxide film during annealing observed by an optical reflectivity difference technique  

E-Print Network [OSTI]

Movement of oxygen vacancies in oxide film during annealing observed by an optical reflectivity. The growth and annealing of the film in vacuum and in oxygen ambient are monitored in real time by an oblique tell whether the oxygen vacancies are moving into or moving out of the film during the annealing

Zhu, Xiangdong

408

Using sheep preference, near infrared reflectance and laboratory tests for predicting voluntary intake  

E-Print Network [OSTI]

Using sheep preference, near infrared reflectance and laboratory tests for predicting voluntary for grinding ; N, NDF, ADF ; in vitro DMD ; and 4 promising second derivatives of the near infrared spectrum in VDMI, gas production methods lose their predictive ability in favour of in sacco methods. Near Infrared

Boyer, Edmond

409

The Analysis and Interpretation of Neutron and X-ray Specular Reflection  

Science Journals Connector (OSTI)

The analysis of neutron and X-ray reflectivity in terms of partial structure factors is described in detail. The method is shown to be an effective means of overcoming problems associated with phase and composition ambiguity. It also offers a means of enhancing the resolution of the experiment.

Lu, J.R.

1996-01-01T23:59:59.000Z

410

Campus Sustainability Plan "UCSC's commitment to sustainability reflects one of our most closely held campus values  

E-Print Network [OSTI]

1 Campus Sustainability Plan "UCSC's commitment to sustainability reflects one of our most closely, which inspired faculty and staff to join in. Today, sustainability is a campuswide commitment, and our, Chancellor 2013­16 #12;2 1 From the Chancellor-- UC Santa Cruz is serious about sustainability, and our

California at Santa Cruz, University of

411

Monitoring of Landfill Leachate Dispersion Using Reflectance Spectroscopy and Ground-Penetrating Radar  

Science Journals Connector (OSTI)

Monitoring of Landfill Leachate Dispersion Using Reflectance Spectroscopy and Ground-Penetrating Radar ... The generation and dispersion of leachate from landfills are slow, unsteady, nonuniform, and sometimes discontinuous depending on the degree of compaction of the fill, seasonal changes in the water supply to the system, and changes in the capping and contaminant walls (2). ...

T. Splajt; G. Ferrier; L. E. Frostick

2003-08-12T23:59:59.000Z

412

Microelectronics Journal 38 (2007) 235244 Design of quantum filters with pre-determined reflection and  

E-Print Network [OSTI]

. For example, in neutron reflectometry, promising procedures were proposed [17­19], but to our knowledge the experi- mental implementation has been limited to one rather specific setup in neutron reflectometry [20 scale such as in the so-called frustrated total reflection of cold neutrons in which the incident

Lagaris, Isaac

413

Surface bidirectional reflectance and albedo properties derived using a land coverbased approach with Moderate Resolution  

E-Print Network [OSTI]

, Canada Alexander P. Trishchenko and Rasim Latifovic Canada Centre for Remote Sensing, Earth Sciences Sector, Natural Resources Canada, Ottawa, Ontario, Canada Zhanqing Li Department of Meteorology and Earth is defined as the ratio of the total (hemispheric) reflected solar radiation flux to the incident flux upon

Li, Zhanqing

414

A 3D-3C Reflection Seismic Survey and Data Integration to Identify the  

Open Energy Info (EERE)

D-3C Reflection Seismic Survey and Data Integration to Identify the D-3C Reflection Seismic Survey and Data Integration to Identify the Seismic Response of Fractures and Permeable Zones Over a Known Geothermal Resource at Soda Lake, Churchill Co., NV Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title A 3D-3C Reflection Seismic Survey and Data Integration to Identify the Seismic Response of Fractures and Permeable Zones Over a Known Geothermal Resource at Soda Lake, Churchill Co., NV Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description The Soda Lake geothermal field is an ideal setting to test the applicability of the 3D-3C reflection seismic method because: it is a producing field with a great deal of geologic and drilling data already available; it is in an alluvial valley where the subsurface structures that carry the geothermal fluids have no surface manifestations; and, there are downhole geophysical logs of fractures and permeable zones that can be used to ground-truth the new data.

415

High Mercury Concentrations Reflect Trophic Ecology of Three Deep-Water Chondrichthyans  

E-Print Network [OSTI]

High Mercury Concentrations Reflect Trophic Ecology of Three Deep-Water Chondrichthyans Michael C concentrations were explored for three deep-water chondrichthyans (Etmopterus princeps, Cen- troscymnus position in the trophic web (as indicated by differences in d15 N). Mercury is a major contaminant

Newman, Michael C.

416

Can we measure terrestrial photosynthesis from space directly, using spectral reflectance and fluorescence?  

E-Print Network [OSTI]

Can we measure terrestrial photosynthesis from space directly, using spectral reflectance the changes in the xanthophyll cycle, which is closely coupled to photosynthesis. Several studies have shown of fluorescence, which is a directly related to the efficiency of photosynthesis. We discuss the state of the art

Jones, Peter JS

417

Beta-diversity on deep-sea wood falls reflects gradients in energy availability  

Science Journals Connector (OSTI)

...deep-sea wood falls reflects gradients in energy availability Craig McClain 1 James Barry...floor represent a significant source of energy into the food-limited deep sea. Unique...equated with considerable differences in energy usage and availability. Our findings...

2014-01-01T23:59:59.000Z

418

Deep seismic reflection study of a passive margin, southeatern Gulf of Guinea  

SciTech Connect (OSTI)

A large grid of deep-imaging, marine seismic reflection data has been acquired in the Gulf of Guinea. The data show that the architecture of old Atlantic igneous crust and upper mantle is highly variable, particularly if reflection Moho is taken to be the base of the crust. Most abrupt changes in oceanic basement thickness and depth to Moho can be correlated with fracture-zone crossings, but significant variations can occur between fracture zones and along flow lines, especially near the ocean-continent transition. Reflection Moho is usually continuous from ocean to continent and does not display any systematic changes in character, continuity, or reflection time even beneath the innermost shelf areas. There are several varieties of intracrustal reflectors, including those that mark different levels within the oceanic gabbroic complex and events that diagonally link the top of oceanic seismic layer 2 and Moho. Different types of sub-Moho dipping reflections also are observed. Some are associated with fracture zones, some originate within continental crust and dip toward the ocean, dissecting Moho without offsetting it, and still others originate at the oceanic Moho and dip toward the continent. The transition from oceanic to continental crust is generally quite sharp north of lat 1{degree}S, but the exact nature of the transition ranges from rift-block geology to abrupt juxtapositions of oceanic and continental crustal rocks. South of about lat 1{degree}S, the transition to continental crust is more gradual, involving a progressive thickening of oceanic crust toward land. This difference may relate to the occurrence of much more oblique initial rifting north of 1{degree}S.

Rosendahl, B.R.; Groschel-Becker, H.; Meyers, J.; Kaczmarick, K. (Univ. of Miami, Florida (USA))

1991-04-01T23:59:59.000Z

419

Quantum tunneling and reflection of a molecule with a single bound state  

SciTech Connect (OSTI)

In this article, we present the results of studies on the quantum mechanical tunneling and reflection of a diatomic, homonuclear molecule with a single bound state incident upon a potential barrier. In the first study, we investigate the tunneling of a molecule using a time-dependent formulation. The molecular wave function is modeled as a Gaussian wave packet, and its propagation is calculated numerically using Crank-Nicholson integration. It is found that a molecule may transition between the bound state and an unbound state numerous times during the process of reflection from or transmission past the barrier. It is also found that, in addition to reflecting and transmitting, the molecule may also temporarily straddle the potential barrier in an unbound state. In the second study, we consider the case of a molecule incident in the bound state upon a step potential with energy less than the step. We show that in the limit where the binding energy e{sub 0} approaches zero and the step potential V{sub 0} goes to infinity, the molecule cannot remain in a bound state if the center of mass gets closer to the step than an arbitrarily large distance x{sub 0} which increases as the magnitude of e{sub 0} decreases, as V{sub 0} increases, or both. We also show that, for e{sub 0{yields}}0{sup -} and V{sub 0{yields}{infinity}}, if the molecule is incident in the bound state, it is reflected in the bound state with probability equal to unity, when the center of mass reaches the reflection distance x{sub 0}. We verify that the unbound states exhibit the expected physical behavior. We discuss some surprising results. Connections between our results and investigations done in cold atoms, excitons, Cooper pairs, and Rydberg atoms are discussed.

Kavka, Jeremy J.; Kerbrat, Danielle; Shegelski, Mark R. A. [Department of Physics, University of Northern British Columbia, Prince George, British Columbia V2N 4Z9 (Canada)

2010-02-15T23:59:59.000Z

420

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

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

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

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Reflective and Automatic Processes in Health Care Professional Behaviour: a Dual Process Model Tested Across Multiple Behaviours  

Science Journals Connector (OSTI)

Clinicians’ behaviours require deliberate decision-making in complex contexts and may involve both impulsive (automatic) and reflective (motivational and volitional) processes.

Justin Presseau Ph.D.; Marie Johnston PhD…

2014-12-01T23:59:59.000Z

422

On characterization and measurement of average solar field mirror reflectance in utility-scale concentrating solar power plants  

Science Journals Connector (OSTI)

Abstract Due to the emerging need for the development of acceptance test codes for commercial concentrating solar power (CSP) plants, an effort is made here to develop a mirror reflectance model suitable for CSP applications as well as a general procedure to measure the average mirror reflectance of a solar field. Typically, a utility-scale solar field includes hundreds of thousands of mirror panels (if not more), and their reflectance is subject to many factors, such as weather and planned washing schedule. The newly developed mirror reflectance model can be used to characterize different types of mirror materials and can be directly used to perform optical performance evaluation of solar collectors. The newly proposed procedure for average solar field reflectance measurements includes a baseline comprehensive measurement and an individual factor measurement: the former allows a comprehensive survey of mirror reflectance across the whole solar field, and the latter can provide correcting factors for selected individual factors to further improve the accuracy of the baseline measurements. A detailed test case implementing the general procedure is applied to a state-of-the-art commercial parabolic trough plant and validates the proposed mirror reflectance model and average reflectance measurement procedure. In the test case, the plant-wide reflectance measurements at a commercial utility-scale solar plant were conducted and can shed light on relevant analysis of CSP applications. The work can also be naturally applied to other types of solar plants, such as power towers and linear Fresnel plants.

Guangdong Zhu; David Kearney; Mark Mehos

2014-01-01T23:59:59.000Z

423

Reflectance variation of human blood under a magnetic field at the Ar-ion laser line: feasibility for clinical diagnosis  

Science Journals Connector (OSTI)

Measuring the reflectance variation ?R under dc magnetic field at Ar+ 0.5017-?m laser line for both corpuscle and plasma human blood samples and applying statistical...

Sato, Heihachi; Hayashi, Hidenori; Sugiyama, Mitsugu; Tsuchiya, Shuji

1981-01-01T23:59:59.000Z

424

Effect of directional dependency of wall reflectivity and incident concentrated solar flux on the efficiency of a cavity solar receiver  

Science Journals Connector (OSTI)

Abstract Managing the optical properties of a cavity solar receiver to create spectral and directional selectivities is a solution to improve receiver efficiencies. A reduction in the incident solar power lost by reflection and by emission in a solar receiver allows the absorption of the solar flux to be maximized. This report investigates the influence of the cavity walls directional reflectivity on the thermal radiative efficiency of a cubic cavity solar receiver. A Monte Carlo ray-tracing method is used to calculate the power lost by reflections and by emission with respect to the incident radiation angular distribution and the bidirectional reflectance distribution function of the cavity walls. To study the influence of the directional dependency of the incident flux on the radiative efficiency, four patterns are considered: collimated, diffuse, focused, and Themis incidences. The directional-hemispherical reflectivity for the bottom wall (face to aperture) and lateral walls are distinguished. For diffuse walls, the absorption efficiency is primarily affected by the lateral walls reflectivity because of the back reflection losses. For specular walls, the driving parameter is the bottom wall reflectivity. In addition, the radiative efficiency with thermal emission was studied for the Themis configuration and a slightly weakest dependency of the efficiency on the lateral walls reflectivity was found.

Florent Larrouturou; Cyril Caliot; Gilles Flamant

2014-01-01T23:59:59.000Z

425

Measuring near-field nanoparticle concentration profiles by correlating surface plasmon resonance reflectance with effective refractive index of nanofluids  

Science Journals Connector (OSTI)

Time-dependent and near-field nanoparticle concentrations are determined by correlating the surface plasmon resonance (SPR) reflectance intensities with the effective refractive...

Kim, Iltai; Kihm, Kenneth D

2010-01-01T23:59:59.000Z

426

Effect of microwave reflection from the region of electron cyclotron resonance heating in the L-2M stellarator  

SciTech Connect (OSTI)

In experiments on electron cyclotron resonance (ECR) heating of plasma at the second harmonic of the electron gyrofrequency in the L-2M stellarator, the effect of partial reflection of high-power gyrotron radiation from the ECR heating region located in the center of the plasma column was revealed. The reflection coefficient is found to be on the order of 10{sup ?3}. The coefficient of reflection of an extraordinary wave from the second-harmonic ECR region is calculated in the one-dimensional full-wave model. The calculated and measured values of the reflection coefficient are found to coincide in order of magnitude.

Batanov, G. M.; Borzosekov, V. D.; Kolik, L. V.; Konchekov, E. M.; Malakhov, D. V.; Petrov, A. E.; Sarksyan, K. A.; Sakharov, A. S., E-mail: sakh@fpl.gpi.ru; Skvortsova, N. N.; Stepakhin, V. D.; Kharchev, N. K. [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)] [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)

2013-11-15T23:59:59.000Z

427

Effect of reflection on H emissions in Alcator C-MOD C. F. F. Karney, D. P. Stotler, and C. H. Skinner  

E-Print Network [OSTI]

the Doppler shift, Zeeman effect, and Stark broadening; and in- clude the effect of wall reflections. DEGAS 2Effect of reflection on H emissions in Alcator C-MOD C. F. F. Karney, D. P. Stotler, and C. H the effects of wall reflection. By assuming that the first wall has different reflection coefficients

Karney, Charles

428

Gafchromic EBT2 film dosimetry in reflection mode with a novel plan-based calibration method  

SciTech Connect (OSTI)

Purpose:A dosimetric system formed by Gafchromic EBT2 radiochromic film and Epson Expression 10000XL flatbed scanner was commissioned for dosimetry. In this paper, several open questions concerning the commissioning of radiochromic films for dosimetry were addressed: (a) is it possible to employ this dosimetric system in reflection mode; (b) if so, can the methods used in transmission mode also be used in reflection mode; (c) is it possible to obtain accurate absolute dose measurements with Gafchromic EBT2 films; (d) which calibration method should be followed; (e) which calibration models should be used; and (f) does three-color channel dosimetry offer a significant improvement over single channel dosimetry. The purpose of this paper is to help clarify these questions. Methods: In this study, films were scanned in reflection mode, the effect of surrounding film was evaluated and the feasibility of EBT2 film dosimetry in reflection mode was studied. EBT2's response homogeneity has been reported to lead to excessive dose uncertainties. To overcome this problem, a new plan-based calibration method was implemented. Plan-based calibration can use every pixel and each of the three color channels of the scanned film to obtain the parameters of the calibration model. A model selection analysis was conducted to select lateral correction and sensitometric curve models. The commonly used calibration with fragments was compared with red-channel plan-based calibration and with three-channel plan-based calibration. Results: No effect of surrounding film was found in this study. The film response inhomogeneity in EBT2 films was found to be important not only due to differences in the fog but also due to differences in sensitivity. The best results for lateral corrections were obtained using absolute corrections independent of the dose. With respect to the sensitometric curves, an empirical polynomial fit of order 4 was found to obtain results equivalent to a gamma-distributed single hit model based on physical assumptions. Three-channel dosimetry was found to be substantially superior to red-channel dosimetry. Conclusions: Reflection mode with Gafchromic EBT2 radiochromic film was found to be a viable alternative to transmission mode. The same methods that are used in transmission mode can be followed in reflection mode. A novel plan-based method was developed for calibration and multichannel dosimetry. This novel method offers increased robustness against film response inhomogeneities and reduces considerably the time required for calibration.

Mendez, I.; Hartman, V.; Hudej, R.; Strojnik, A.; Casar, B. [Department of Medical Physics, Institute of Oncology Ljubljana, Zaloska cesta 2, Ljubljana 1000 (Slovenia)

2013-01-15T23:59:59.000Z

429

Reflection Survey At Dixie Valley Geothermal Field Area (Blackwell, Et Al.,  

Open Energy Info (EERE)

3) 3) Exploration Activity Details Location Dixie Valley Geothermal Field Area Exploration Technique Reflection Survey Activity Date Usefulness useful DOE-funding Unknown Notes The seismic reflection data are very useful and can be site specific when a profile is in the right place, but are sparse, very difficult to interpret correctly, and expensive to collect. The velocity values used are uncertain even though there are several sonic logs for the wells. A VSP, Vertical Seismic Profile, survey would significantly improve the precision of the interpretation References D. D. Blackwell, K. W. Wisian, M. C. Richards, Mark Leidig, Richard Smith, Jason McKenna (2003) Geothermal Resource Analysis And Structure Of Basin And Range Systems, Especially Dixie Valley Geothermal Field, Nevada

430

NREL: Technology Transfer - NREL and SkyFuel Partnership Reflects Bright  

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

NREL and SkyFuel Partnership Reflects Bright Future for Solar Energy NREL and SkyFuel Partnership Reflects Bright Future for Solar Energy In this video, NREL Principal Scientist Gary Jorgensen and SkyFuel Chief Technology Officer Randy Gee talk about their partnership to develop a thin film to substitute for bulkier glass mirrors on solar-collecting parabolic troughs. Get the Adobe Flash Player to see this video. Credit: Fireside Production More Information For more information about NREL's partnership with SkyFuel, read Award-Winning Reflector to Cut Solar Cost and New Solar Technology Concentrates on Cost, Efficiency. Learn more about NREL's Concentrating Solar Power Research. Printable Version Technology Transfer Home About Technology Transfer Technology Partnership Agreements Licensing Agreements Nondisclosure Agreements Research Facilities

431

Cloud Properties Derived from Visible and Near-infrared Reflectance in the  

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

Cloud Properties Derived from Visible and Near-infrared Reflectance in the Cloud Properties Derived from Visible and Near-infrared Reflectance in the Presence of Aerosols Hofmann, Odele University of Colorado at Boulder Pilewskie, Peter University of Colorado Gore, Warren NASA Ames Research Center Russell, Phil NASA Ames Research Center Livingston, John SRI International Redemann, Jens BAERI/NASA Ames Research Center Bergstrom, Robert Bay Area Environmental Research Institute Platnick, Steven NASA-GSFC Daniel, John NOAA Aeronomy Laboratory Category: Cloud Properties The New England Air Quality Study - Intercontinental Transport and Chemical Transformation (NEAQS-ITCT) experiment conducted in July-August 2004 included objectives on the effects of urban-industrial pollution aerosols on cloud radiative properties, the so-called indirect effect. Measurements

432

CLASS DEVIATION TO REFLECT CHANGES TO THE COOPERA TNE AUDIT STRATEGY  

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

TO REFLECT CHANGES TO THE TO REFLECT CHANGES TO THE COOPERA TNE AUDIT STRATEGY BACKGROUND DOE's Office of Inspector General (IG) is statutorily responsible for the audit of DOE's management and operating contracts (M&Os). Those contracts have two significant financial characteristics in common: (1) the use of special bank accounts for payment of contract costs and (2) the annual reconciliation of contract costs through the use of a Statement of Costs Incurred and Claimed. These two characteristics operate in tandem, replacing a system of vouchers to reimburse incurred costs normally used on government cost type contracts. M&O contracts incur costs of several hundreds of millions of dollars to more than $1 billion. The IG has designed a Cooperative Audit Strategy to fulfill its M&O audit responsibilities. That

433

Obama's Call for Public-Private Cyber Security Collaboration Reflected in  

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

Obama's Call for Public-Private Cyber Security Collaboration Obama's Call for Public-Private Cyber Security Collaboration Reflected in DOE's Priorities Obama's Call for Public-Private Cyber Security Collaboration Reflected in DOE's Priorities May 29, 2009 - 4:08pm Addthis In releasing the results of his Administration's 60-day cyber security review, President Barack Obama today emphasized that partnering with the private sector will be paramount for agencies working to secure the power grid and other critical infrastructures from cyber attack. Securing the computer-based systems that monitor and control the nation's electric grid and oil and gas pipelines remains a shared challenge for the Department of Energy. As the industry quickly works to develop and demonstrate Smart Grid technologies to build a more reliable and resilient

434

Octupole deformation and Ra puzzle in reflection asymmetric covariant density functional theory  

E-Print Network [OSTI]

Reflection asymmetric covariant density functional theory(CDFT) based on the point-coupling interaction is established on a two-center harmonic-oscillator basis and applied to investigate the Ra puzzle, i.e., the anomalous enhancement of the residual proton-neutron interactions for Ra isotopes around N=135. The octupole deformation and shape evolution in the Ra and Rn isotopes are examined in the potential energy surfaces in(beta2, beta3) plane by the constrained reflection asymmetric calculations. The residual proton-neutron interactions extracted from the double difference of the binding energies for Ra isotopes are compared with the data as well as the axial and the triaxial calculations. It is found that the octupole deformation is responsible for the Ra puzzle in the microscopic CDFT.

L. F. Yu; P. W. Zhao; S. Q. Zhang; J. Meng

2012-11-03T23:59:59.000Z

435

Effect of crystal anisotropy on the infrared reflectivity of 6H-SiC  

Science Journals Connector (OSTI)

Polarized infrared reflectivity spectra of 6H-SiC single crystals under different angles of incidence are reported. A new sharp line in the reststrahl band was observed in the extraordinary ray, whose line shape is dependent on the angle of incidence. It was possible to show that crystal anisotropy of 6H-SiC is the reason for the new line in the reflectivity spectrum. A numerical calculation using a Lorentz oscillator model confirmed this result. Two weak one-phonon absorption lines in the reststrahl-band region for E?c were observed. Furthermore, we found a line at 859 cm-1 in the extraordinary ray and an unusual structure near ?TO in the reststrahl band of parallel c-cut 6H-SiC samples, which could not be explained in terms of the classical Lorentz oscillator model.

F. Engelbrecht and R. Helbig

1993-12-01T23:59:59.000Z

436

Electro-optics of graphene: Field-modulated reflection and birefringence  

Science Journals Connector (OSTI)

The electro-optical response of graphene due to heating and drift of carriers is studied theoretically. Real and imaginary parts of the dynamic conductivity tensor are calculated for the case of effective momentum relaxation, when anisotropic contributions are small. We use the quasiequilibrium distribution of electrons and holes, characterized by the effective temperature of carriers and by concentrations, which are controlled by gate voltage and in-plane electric field. The geometry of normal propagation of probe radiation is considered; spectral and field dependences of the reflection coefficient and the relative absorption are analyzed. The ellipticity degree of the reflected and transmitted radiations due to small birefringence of a graphene sheet with current has also been determined.

M. V. Strikha and F. T. Vasko

2010-03-09T23:59:59.000Z

437

Analyses of Greek Research Reactor with mixed HEU-LEU Be reflected core  

SciTech Connect (OSTI)

The fuel-cycle analyses presented in this paper provide specific steps to be taken in the transition from a 36-element water-reflected HEU core to a 33-element LEU equilibrium core with a Be reflector on two faces. The first step will be to install the Be reflector and remove the highest burnup HEU fuel. The smaller Be-reflected core will be refueled with LEU fuel. All analyses were performed using a planar 5-group REBUS3 model benchmarked to VIM Monte Carlo. In addition to fuel cycle results, the control rod worth, reactivity response to increased fuel and water temperature and decreased water density were compared for the transition core and the reference HEU core.

Deen, J.R.; Snelgrove, J.L. [Argonne National Lab., IL (United States); Papastergiou, K. [National Center for Scientific Research, Athens (Greece)

1993-12-31T23:59:59.000Z

438

Intra-Cavity Total Reflection For High Sensitivity Measurement Of Optical Properties  

DOE Patents [OSTI]

An optical cavity resonator device is provided for conducting sensitive murement of optical absorption by matter in any state with diffraction-limited spatial resolution through utilization of total internal reflection within a high-Q (high quality, low loss) optical cavity. Intracavity total reflection generates an evanescent wave that decays exponentially in space at a point external to the cavity, thereby providing a localized region where absorbing materials can be sensitively probed through alteration of the Q-factor of the otherwise isolated cavity. When a laser pulse is injected into the cavity and passes through the evanescent state, an amplitude loss resulting from absorption is incurred that reduces the lifetime of the pulse in the cavity. By monitoring the decay of the injected pulse, the absorption coefficient of manner within the evanescent wave region is accurately obtained from the decay time measurement.

Pipino, Andrew C. R. (Gaithersburg, MD); Hudgens, Jeffrey W. (Rockville, MD)

1999-08-24T23:59:59.000Z

439

Intra-Cavity Total Reflection For High Sensitivity Measurement Of Optical Properties  

DOE Patents [OSTI]

An optical cavity resonator device is provided for conducting sensitive murement of optical absorption by matter in any state with diffraction-limited spatial resolution through utilization of total internal reflection within a high-Q (high quality, low loss) optical cavity. Intracavity total reflection generates an evanescent wave that decays exponentially in space at a point external to the cavity, thereby providing a localized region where absorbing materials can be sensitively probed through alteration of the Q-factor of the otherwise isolated cavity. When a laser pulse is injected into the cavity and passes through the evanescent state, an amplitude loss resulting from absorption is incurred that reduces the lifetime of the pulse in the cavity. By monitoring the decay of the injected pulse, the absorption coefficient of manner within the evanescent wave region is accurately obtained from the decay time measurement.

Pipino, Andrew Charles Rule (Gaithersburg, MD)

1999-11-16T23:59:59.000Z

440

A simple scanning spectrometer based on a stretchable elastomeric reflective grating  

SciTech Connect (OSTI)

We report a scanning optical spectrometer based on the use of a stretchable elastomeric reflective grating. The grating is obtained by supersonic cluster beam implantation of silver nanoparticles on polydimethylsiloxane previously grooved by molding to create a replica of a commercial digital versatile disk grating. The use of a stretchable grating allows the spectrometer spanning the whole optical wavelength range by solely extending the diffraction element by more than 100% of its original dimensions. The stretchable reflective optical grating shows excellent performances and stability upon thousands of stretching cycles. The use of this elastomeric element makes the optical layout and the mechanics of the spectrometer extremely simple and advantageous for those applications where spectral resolution is not a major requirement. As a proof of principle, we present the absorption spectrum of Rhodamine B in solution obtained by our spectrometer and compared to commercial instruments.

Ghisleri, C.; Milani, P., E-mail: paolo.milani@mi.infn.it [CIMAINA and Dipartimento di Fisica, Università di Milano, via Celoria 16, 20133 Milano (Italy); WISE srl, Piazza Duse 2, 20122 Milano (Italy); Potenza, M. A. C.; Bellacicca, A. [CIMAINA and Dipartimento di Fisica, Università di Milano, via Celoria 16, 20133 Milano (Italy); Ravagnan, L. [WISE srl, Piazza Duse 2, 20122 Milano (Italy)

2014-02-10T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

The search for Nanobubbles by using specular and off-specular Neutron Reflectivity  

E-Print Network [OSTI]

In this work we show an example where specular and off-specular neutron reflectivity can give insight into the structure of solid/liquid interfaces. The presence of nanobubbles and/or a depletion layer at the interface has been long discussed and generated a plethora of controversial scientific results. By means of time of flight neutron reflectometry (NR) and grazing incidence small angle scattering (GISANS), we studied the interface between hydrophobized silicon and heavy water in normal and nigrogen gas enriched state. Our results from the specular reflectivities can be explained without an assumption of a depletion layer and the off-specular measurements show no change with nitrogen super saturated water, which is consistent with the assumption that no nanobubbles are present. We discuss the experiments, in terms of the maximum surface coverage of nanobubbles that could be present on the hydrophobic surface compatible with the limit of sensitivity of NR and GISANS.

Philipp Gutfreund; Marco Maccarini; Andrew Dennison; Max Wolff

2013-04-17T23:59:59.000Z

442

Reflection Survey At Cove Fort Area - Liquid (Toksoz, Et Al, 2010) | Open  

Open Energy Info (EERE)

(Toksoz, Et Al, 2010) (Toksoz, Et Al, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Cove Fort Area (Toksoz, Et Al, 2010) Exploration Activity Details Location Cove Fort Geothermal Area Exploration Technique Reflection Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes We have collected various geophysical data around the geothermal field, including heat flow, gravity, MT, seismic surface wave phase and group velocity maps, seismic body wave travel time data and full seismic waveforms. All of these geophysical data sets have different strengths on characterizing subsurface structures and properties. Combining these data through a coordinated analysis and, when possible, by joint inversion provides a detailed model of the Cove Fort geothermal region.

443

Reflection Survey At Under Steamboat Springs Area (Warpinski, Et Al., 2002)  

Open Energy Info (EERE)

2) 2) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Under Steamboat Springs Area (Warpinski, Et Al., 2002) Exploration Activity Details Location Under Steamboat Springs Area Exploration Technique Reflection Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes This project consisted of (1) a 3-D surface seismic survey conducted in the fall of 2000, (2) a micro-seismic survey run from November 2000 to April 200 1, and (3) a gravity survey conducted in April and May 2001. The 3-D surface seismic data are still being processed at this time, but initial results indicate that there are two major lineations of high velocity running orthogonal to each other which are presumably related to the fault

444

Reflection type of terahertz imaging system using a high-T{sub c} superconducting oscillator  

SciTech Connect (OSTI)

A reflection type of imaging system is shown at sub-terahertz frequencies generated from high-T{sub c} superconducting intrinsic Josephson junction mesa structures fabricated by single crystalline Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+?} to demonstrate how the sub-terahertz imaging technique using monochromatic radiation is powerful and unique for the variety of practical applications. Several examples are discussed in detail and are compared to other terahertz imaging systems.

Kashiwagi, T.; Minami, H.; Kadowaki, K. [Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8571 (Japan); Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573 (Japan); Nakade, K.; Saiwai, Y.; Kitamura, T.; Watanabe, C.; Ishida, K.; Sekimoto, S.; Asanuma, K.; Yasui, T.; Shibano, Y. [Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8571 (Japan); Markovi?, B.; Mirkovi?, J. [Faculty of Sciences, University of Montenegro, George Washington Str., 81000 Podgorica (Montenegro); Tsujimoto, M. [Department of Electronic Science and Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510 (Japan); Yamamoto, T. [National Institute for Materials Science, Wide Bandgap Materials Group, Optical and Electronic Materials Unit, Environment and Energy Materials Division, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

2014-01-13T23:59:59.000Z

445

Specular neutron reflection at the mica/water interface - irreversible adsorption of a cationic dichain surfactant  

Science Journals Connector (OSTI)

A novel experimental method to exploit specular neutron reflection from the surface of mica at the solid/liquid interface is reported. The approach involves supporting a thin mica crystal on a silicon substrate. The applicability of this technique for mica is demonstrated by adsorption of a dichain surfactant to form a complete unhydrated bilayer at this interface and its partial removal by washing and ion exchange.

Browning, K.L.

2014-09-20T23:59:59.000Z

446

Thin film transistors on plastic substrates with reflective coatings for radiation protection  

DOE Patents [OSTI]

Fabrication of silicon thin film transistors (TFT) on low-temperature plastic substrates using a reflective coating so that inexpensive plastic substrates may be used in place of standard glass, quartz, and silicon wafer-based substrates. The TFT can be used in large area low cost electronics, such as flat panel displays and portable electronics such as video cameras, personal digital assistants, and cell phones.

Wolfe, Jesse D. (Fairfield, CA); Theiss, Steven D. (Woodbury, MN); Carey, Paul G. (Mountain View, CA); Smith, Patrick M. (San Ramon, CA); Wickbold, Paul (Walnut Creek, CA)

2006-09-26T23:59:59.000Z

447

Whole House Thermal Performance of Asphalt Shingles Exploiting Special Infrared Reflective Pigments  

E-Print Network [OSTI]

are single-family detached houses (State of California 2000). In California, residential air-conditioning loads represent almost 14% of the summer peak demand, the equivalent of over 7,000 MW of peak capacity during a hot California summer day... surface temperatures reduce the cooling- energy demand of the building and could increase the life of the roof product. However, determining the effects of climate and solar exposure on reflectance and color variability over time is of paramount...

Hahn, L.; Miller, W.; Desjarlais, A.; Jacobs, J.; Youngquist, A.

2006-01-01T23:59:59.000Z

448

Chirality-induced `forbidden' reflections in X-ray resonant scattering  

Science Journals Connector (OSTI)

It is shown that additional Bragg reflections can appear in resonant near-edge X-ray diffraction exclusively owing to the local chirality associated with the left-right asymmetric environment of scattering atoms. This effect occurs even in centrosymmetric crystals, which are not gyrotropic in optics, and some realistic examples are considered in detail (-Fe2O3, LiNbO3 etc.).

Dmitrienko, V.E.

2001-10-26T23:59:59.000Z

449

Development of the Channel Cut Monochromator with Curved Reflecting Surfaces at NSRL  

SciTech Connect (OSTI)

To simplify the complicated mechanism of the traditional double crystal monochromator for synchrotron radiation, a kind of channel cut monochromator with curved reflecting surfaces to fix the exit beam position was successfully developed at NSRL. The performance of this monochromator, which includes the relative efficiency, diffraction bandwidth and deviation of the beam spot, was calculated and measured. The analysis of these results are presented in this paper.

Kang Le; Li Zhongliang; Feng Liangjie; Dong Xiaohao; Lu Lei; Zhao Feiyun; Xu Chaoyin [National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, Anhui (China)

2010-06-23T23:59:59.000Z

450

Reflective 'cool' roofs under aerosol-burdened skies: radiative benefits across selected Indian cities  

Science Journals Connector (OSTI)

The use of reflective surfaces offers one low-cost solution for reducing solar loading to urban environments and the Earth that should be considered as part of sustainable urban design. Here, we characterize the radiative benefits, i.e. the additional shortwave radiation leaving the atmosphere, from the installation of highly reflective 'cool' roofs in urban areas in India that face relatively large local aerosol burdens. We use a previously tested column radiative transfer model to estimate the energy per unit area reflected to space from increasing the surface albedo at six cities within India. The model is used to characterize radiative transfer each day over five years (2008–2012) based on mid-day satellite retrievals of MODIS aerosol depth, cloud water path, and average surface albedo and MERRA atmospheric profiles of temperature and composition. Compared against ten months of field observations in two cities, the model derived incoming surface shortwave radiation estimates relative to observations show small biases (0.5% and ?2.6%, at Pantnagar and Nainital, respectively). Despite the high levels of local aerosols we found cool roofs provided significant radiative benefits at all locations. Averaged over the five year period we found that increasing the albedo of 1 m2 of roof area by 0.5 would reflect to space 0.9–1.2 kWh daily from 08:30–15:30 LST, depending on location. This is equivalent to a constant forcing of 37–50 W m?2 (equivalent to reducing CO2 emissions by 74 to 101 kg CO2 m?2 roof area). Last, we identify a co-benefit of improving air quality, in that removing aerosols from the atmosphere could increase the radiative benefits from cool roofs by 23–74%, with the largest potential increase found at Delhi and the smallest change found at Nainital.

D E Millstein; M L Fischer

2014-01-01T23:59:59.000Z

451

Optimization of experimental conditions in IR reflectance determination of BPSG properties  

SciTech Connect (OSTI)

Experiments were performed to examine sensitivity of thin-film property determinations to several experimental variables when applying multivariate calibration methods to infrared reflection spectroscopic data. Results indicate that low angles of incidence are best for robust quantitative determination of boron, phosphorus, and film thickness in borophosphosilicate glass (BPSG) dielectric films. However, the polarization state of the incidence beam does not affect the quantitative prediction ability.

Zhang, L.; Franke, J.E.; Niemczyk, T.M. [New Mexico Univ., Albuquerque, NM (United States). Dept. of Chemistry; Haaland, D.M. [Sandia National Labs., Albuquerque, NM (United States)

1993-11-01T23:59:59.000Z

452

Compact Reflection-Type Phaser Using Quarter-Wavelength Transmission Line Resonators  

E-Print Network [OSTI]

A compact reflection-type phaser composed of quarter-wavelength transmission line resonators interconnected by alternating K- and J-inverters is proposed. A design method is also presented. To validate this method, a 4th-order example is designed and fabricated. The proposed phaser is shown to exhibit the benefits of smaller size, easier fabrication and suppressed even-order harmonics compared with previously reported half-wavelength phasers.

Liao, Weiwei; Chen, Yifan; Caloz, Christophe

2014-01-01T23:59:59.000Z

453

Integrated X-Ray Reflectivity Measurements for Elliptically Curved PET Crystals  

SciTech Connect (OSTI)

Spectroscopy provides valuable information about the temperature and density of a compressed pellet in a plasma. Elliptically curved pentaerythritol (PET) crystals are used as components for spectrometers. Their elliptical geometry gives several advantages related to spectral energy range, source focus, and spectral image compression.[1] The crystal curvature increases the spectrometer throughput but at the cost of a loss in resolution. Four different crystals are used in a spectrometer at the National Ignition Facility (NIF) target chamber at Lawrence Livermore National Laboratory (LLNL). Figure 1 shows the arrangement of the elliptical PET crystals in the snout of a NIF target diagnostic shown in Figure 2. The spectrum from the crystals is captured by four image plates located behind the crystals. A typical mandrel, the darkened section, upon which the PET crystal is glued, is shown in Figure 3, which also shows the complete ellipse. There are four elliptical segment types, each having the same major axis but a different minor axis. The crystals are 150 mm long in the diffraction direction and 25.4 mm high. Two crystals of each type were calibrated. The throughput for each spectrometer is determined by the integrated reflectivity of the PET crystal.[1] The goal of this effort was to measure the reflectivity curve of the PET curved crystal at several energies and determine the integrated reflectivity and the curve width as a function of the X-ray spectral energy and location on the ellipse where the beam strikes.

Haugh, M J; Ross, P W; Regan, P W; Magoon, J; Shoup, M J; Barrios, M A; Emig, J A

2012-04-26T23:59:59.000Z

454

Vacuum ultraviolet reflectivities of LiF, NaF, and KF  

Science Journals Connector (OSTI)

High-resolution normal-incidence (9°) reflectivities of lithium-fluoride, sodium-fluoride, and potassium-fluoride single crystals were investigated between 6 and 35 eV at room temperature, 100 and 30 K using a minicomputer-controlled vacuum ultraviolet reflectometer at the Winconsin Synchrotron Radiation Facility. Data were taken on surfaces cleaved and maintained in high vacuum. Reflectivity data were Kramers-Kronig analyzed to yield the dielectric functions of the materials and various energy and temperature derivatives were calculated as an aid to interpretation. In all materials, considerable new structure is reported with broad, general agreement with earlier work on LiF and KF. We report the first reflectivity data between 12 and 35 eV for NaF. Computed values of -Im(1?) were in good agreement with electron-energy-loss experiments of Creuzburg. It is only possible to provide detailed interpretation of optical features in special cases, but a general discussion is provided in the conventional framework.

K. Kameswara Rao; T. J. Moravec; J. C. Rife; R. N. Dexter

1975-12-15T23:59:59.000Z

455

A low-frequency asymptotic model of seismic reflection from a high-permeability layer  

SciTech Connect (OSTI)

Analysis of compression wave propagation through a high-permeability layer in a homogeneous poroelastic medium predicts a peak of reflection in the low-frequency end of the spectrum. An explicit formula expresses the resonant frequency through the elastic moduli of the solid skeleton, the permeability of the reservoir rock, the fluid viscosity and compressibility, and the reservoir thickness. This result is obtained through a low-frequency asymptotic analysis of the Biot's model of poroelasticity. A new physical interpretation of some coefficients of the classical poroelasticity is a result of the derivation of the main equations from the Hooke's law, momentum and mass balance equations, and the Darcy's law. The velocity of wave propagation, the attenuation factor, and the wave number, are expressed in the form of power series with respect to a small dimensionless parameter. The latter is equal to the product of the kinematic reservoir fluid mobility, an imaginary unit, and the frequency of the signal. Retaining only the leading terms of the series leads to explicit and relatively simple expressions for the reflection and transmission coefficients for a planar wave crossing an interface between two permeable media, as well as wave reflection from a thin highly-permeable layer (a lens). The practical implications of the theory developed here are seismic modeling, inversion, and attribute analysis.

Silin, Dmitriy; Goloshubin, Gennady

2009-03-01T23:59:59.000Z

456

Retrieval of Aerosol Optical Depth in Vicinity of Broken Clouds from Reflectance Ratios: Sensitivity Study  

SciTech Connect (OSTI)

We conducted a sensitivity study to better understand the potential of a new method for retrieving aerosol optical depth (AOD) under partly cloudy conditions. This method exploits reflectance ratios in the visible spectral range and provides an effective way to avoid three-dimensional (3D) cloud effects. The sensitivity study is performed for different observational conditions and random errors in input data. The results of the sensitivity study suggest that this ratio method has the ability to detect clear pixels even in close proximity to clouds. Such detection does not require a statistical analysis of the two-dimensional (2D) horizontal distribution of reflected solar radiation, and thus it could be customized for operational retrievals. In comparison with previously suggested approaches, the ratio method has the capability to increase the "harvest" of clear pixels. Similar to the traditional Independent Pixel Approximation (IPA), the ratio method has a low computational cost for retrieving AOD. In contrast to the IPA method, the ratio method provides much more accurate estimations of the AOD values under broken cloud conditions: pixel-based and domain-averaged estimations of errors in AOD are about 25% and 10%, respectively. Finally, both the ratio-based cloud screening and the accuracy of domain-averaged ratio-based AOD values do not suffer greatly when 5% random errors are introduced in the reflectances.

Kassianov, Evgueni I.; Ovtchinnikov, Mikhail; Berg, Larry K.; McFarlane, Sally A.; Flynn, Connor J.

2009-09-01T23:59:59.000Z

457

The puzzle of the soft X-ray excess in AGN: absorption or reflection?  

E-Print Network [OSTI]

The 2-10 keV continuum of AGN is generally well represented by a single power law. However, at smaller energies the continuum displays an excess with respect to the extrapolation of this power law, called the ''soft X-ray excess''. Until now this soft X-ray excess was attributed, either to reflection of the hard X-ray source by the accretion disk, or to the presence of an additional comptonizing medium, giving a steep spectrum. An alternative solution proposed by Gierlinski and Done (2004) is that a single power law well represents both the soft and the hard X-ray emission and the impression of the soft X-ray excess is due to absorption of a primary power law by a relativistic wind. We examine the advantages and drawbacks of reflection versus absorption models, and we conclude that the observed spectra can be well modeled, either by absorption (for a strong excess), or by reflection (for a weak excess). However the physical conditions required by the absorption models do not seem very realistic: we would pref...

Chevallier, Loïc; Dumont, A M; Czerny, B; Mouchet, M; Gonçalves, A C; Goosmann, R W

2006-01-01T23:59:59.000Z

458

The puzzle of the soft X-ray excess in AGN: absorption or reflection?  

E-Print Network [OSTI]

The 2-10 keV continuum of AGN is generally well represented by a single power law. However, at smaller energies the continuum displays an excess with respect to the extrapolation of this power law, called the ''soft X-ray excess''. Until now this soft X-ray excess was attributed, either to reflection of the hard X-ray source by the accretion disk, or to the presence of an additional comptonizing medium, giving a steep spectrum. An alternative solution proposed by Gierlinski and Done (2004) is that a single power law well represents both the soft and the hard X-ray emission and the impression of the soft X-ray excess is due to absorption of a primary power law by a relativistic wind. We examine the advantages and drawbacks of reflection versus absorption models, and we conclude that the observed spectra can be well modeled, either by absorption (for a strong excess), or by reflection (for a weak excess). However the physical conditions required by the absorption models do not seem very realistic: we would prefer an ''hybrid model''.

L. Chevallier; S. Collin; A. -M. Dumont; B. Czerny; M. Mouchet; A. C. Goncalves; R. W. Goosmann

2006-01-19T23:59:59.000Z

459

Evaluation of Plutonium Hemisphere Critical Experiments Partially Reflected by Steel and Oil  

SciTech Connect (OSTI)

A series of 15 critical experiments performed at the Rocky Flats Critical Mass Laboratory in the late 1960s were evaluated and then determined to represent acceptable benchmark experiments for the validation of calculational methods. This series of experiments was part of a larger set of experiments performed to evaluate operational safety margins at the Rocky Flats Plant. The experiments consisted of bare plutonium metal hemishells reflected by steel hemishells of increasing thickness and motor oil. The hemishell assembly was suspended within dual aluminum tanks. Criticality was achieved by pumping oil into the tanks such that effectively infinite reflection was achieved in all directions except directly above the assembly; then the critical oil height was recorded. The results of these experiments had been initially ignored because early computational methods had been inadequate to analyze partially-reflected configurations. The dominant uncertainties include the uncertainty in the average plutonium density and the composition of materials in the gaps between the plutonium hemishells. Simple and detailed benchmark models were developed. Eigenvalue calculations using MCNP5 and ENDF/B-VII.0 were within 2s of the benchmark values. This benchmark evaluation has been added to the ICSBEP Handbook.

John D. Bess

2012-01-01T23:59:59.000Z

460

Reflectance and Mössbauer spectroscopy of ferrihydrite-montmorillonite assemblages as Mars soil analog materials  

Science Journals Connector (OSTI)

Spectroscopic analyses show that Fe3+-doped smectites prepared in the laboratory exhibit important similarities to the soils on Mars. Ferrihydrite has been identified as the interlayer ferric component in Fe3+-doped smectites by a low quadrupole splitting and magnetic field strength of ~ 48 tesla in Mössbauer spectra measured at 4.2 K, as well as a crystal field transition at 0.92 ?m. Ferrihydrite in these smectites explains features in the visible-near infrared region that resemble the energies and band strengths of features in reflectance spectra observed for several bright regions on Mars. Clay silicates have met resistance in the past as Mars soil analogs because terrestrial clay silicates exhibit prominent hydrous spectral features at 1.4, 1.9, and 2.2 ?m; and these are observed weakly, if at all, in reflectance spectra of Mars. However, several mechanisms can weaken or compress these features, including desiccation under low-humidity conditions. The hydration properties of the interlayer cations also effect band strengths, such that a ferrihydrite-bearing smectite in the Martian environment would exhibit a 1.9 ?m H2O absorption that is even weaker than the 2.2 ?m structural OH absorption. Mixing experiments demonstrate that infrared spectral features of clays can be significantly suppressed and that the reflectance can be significantly darkened by mixing with only a few percent of a strongly absorbing opaque material. Therefore, the absolute reflectance of a soil on Mars may be disproportionately sensitive to a minor component. For this reason, the shape and position of spectral features and the chemical composition of potential analogs are of utmost importance in assessing the composition of the soil on Mars. Given the remarkable similarity between visible-infrared reflectance spectra of soils in bright regions on Mars and Fe3+-doped montmorillonites, coupled with recent observations of smectites in SNC meteorites and a weak 2.2 ?m absorption in some Mars soils, ferrihydrite-bearing smectites warrant serious consideration as a Mars soil analog.

Janice L. Bishop; CarléM. Pieters; Roger G. Burns

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflection radiometer aster" 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

Scanning multichannel microwave radiometer snow water equivalent assimilation  

E-Print Network [OSTI]

(AMSR-E) observing system. Many investi- gators have carefully evaluated the accuracy of remotely sensed

Walker, Jeff

462

Posters Radar/Radiometer Retrievals of Cloud Liquid Water and  

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

Environmental Technology Laboratory Boulder, Colorado B. Stevens and W. R. Cotton Colorado State University Fort Collins, Colorado Introduction Marine stratocumulus...

463

USE OF A THERMOPILE RADIOMETER FOR MEASURING THE ...  

Science Journals Connector (OSTI)

“deck” unit, placed in gimbals or used separately to measure the energy output of various laboratory light sources employed in the rearing of algae. The deck ...

1999-12-23T23:59:59.000Z

464

Design evaluation of a ground based radiometer system  

E-Print Network [OSTI]

, maximum Mixer Double balanced; utilizing low-noise, high reliability Schottky diodes. Conversion. Loss about 7. 6 dB. Matched to the preamplifier. IF Pream lifier Frequency Range 1. 4 ? 1. 6 GHz 36 dB Ripple Noise Figure USWR 0. 3 dB, maximum 4.... . . . . . . . . . . . . . . . . . 110 New Mixer Theoretical Noise Improvement . . . . . 110 Measured X-Band. Sensitivity . . . . . . . . . . . 113 Error Due to the Temperature-Limited Diode Noise Source. . . . . . . . . . . . . . . . 116 VI. CONCLUSIONS AND RECOMMENDATIONS...

McClellan, Wallace Roy

2012-06-07T23:59:59.000Z

465

Design and Demonstration of an Interference Suppressing Microwave Radiometer  

E-Print Network [OSTI]

spectrum. For L-band systems, 27 MHz is protected from 1400-1427 MHz, but bandwidths on the order of 100 Kinnear Rd., Columbus, OH 43212 hampson.8, johnson.1374 @osu.edu *Department of Electrical and Computer MHz of spectrum and applies real-time RFI mitigation tech- niques using FPGAs. A field test

Ellingson, Steven W.

466

Tri-material multilayer coatings with high reflectivity and wide bandwidth for 25 to 50 nm extreme ultraviolet light  

SciTech Connect (OSTI)

Magnesium/silicon carbide (Mg/SiC) multilayers have been fabricated with normal incidence reflectivity in the vicinity of 40% to 50% for wavelengths in the 25 to 50 nm wavelength range. However many applications, for example solar telescopes and ultrafast studies using high harmonic generation sources, desire larger bandwidths than provided by high reflectivity Mg/SiC multilayers. We investigate introducing a third material, Scandium, to create a tri-material Mg/Sc/SiC multilayer allowing an increase the bandwidth while maintaining high reflectivity.

Aquila, Andrew; Salmassi, Farhad; Liu, Yanwei; Gullikson, Eric M.

2009-09-09T23:59:59.000Z

467

Seismic reflection imaging of a geothermal aquifer in an urban setting  

SciTech Connect (OSTI)

A seismic reflection survey that was conducted in downtown Boise, Idaho, to help city planners site a new well for injection of spent geothermal water illustrates some methods to safely and successfully employ a seismic reflection survey in an urban setting. The objective of the seismic survey was to estimate the depth and continuity of a basalt and rhyolite volcanic sequence. Well siting was based on geothermal aquifer depth, location of interpreted faults, projected thermal impact of injection on existing wells, surface pipe extension costs, and public land availability. Seismic acquisition tests and careful processing were used to ensure high-quality data while minimizing the potential for damage along city streets. A video camera placed in a sewer and a blast vibration monitor were used to confirm that energy from the seismic source (a 75-in{sup 3} land air gun) did not damage nearby buildings, street surfaces, or buried utilities along the survey lines. Walkaway seismic tests were also used to compare signal quality of the air-gun source to an explosive source for imaging targets up to 800 m depth. These tests show less signal bandwidth from the air-gun source compared to the buried explosive source, but the air-gun signal quality was adequate to meet imaging objectives. Seismic reflection results show that the top of this rhyolite/basalt sequence dips ({approximately}8--1{degree}) southwest away from the Boise foothills at depths of 200 to 800 m. Seismic methods enabled interpretation of aquifer depths along the profiles and located fault zones where injected water may encounter fracture permeability and optimally benefit the existing producing system. The acquisition and processing techniques used to locate the Boise injection well may succeed for other hydrogeologic and environmental studies in urban settings.

Liberty, L. [Boise State Univ., ID (United States). Center for Geophysical Investigation of the Shallow Subsurface] [Boise State Univ., ID (United States). Center for Geophysical Investigation of the Shallow Subsurface

1998-07-01T23:59:59.000Z

468

Reflection seismic profiling in Wabash Valley fault system in southwestern Indiana  

SciTech Connect (OSTI)

During the summer of 1988 common-depth-point (CDP) reflection seismic profiling was initiated by ARPEX in southwestern Indiana in the Wabash Valley fault system. A 2.2-im (1.4-mi) east-west profile was shot across the Mt. Vernon graben in Posey County. Minihole shooting in 21-m (68.9-ft) patterns using 3.4 kg (7.5 lb) of seismic explosives distributed in five 3-m (10-ft) holes provided the energy source. Most shotholes were made with a reversible air-driven penetrating tool that was effective in dense clays. The 12-geophone array length was 43 m (141 ft), and the nominal far-trace offset was 2.1 km (7,000 ft). A 48-channel recording yielded 24-CDP coverage at 11-m (36-ft) intervals. Data were enhanced by gapped deconvolution, bandpass filtering, and CDP stack. The strongest and most continuous reflections at 0.75 and 1.6 sec are associated with the New Albany Shale (Devonian-Mississippian) and Eau Claire Formation (Cambrian), respectively. Within the Mt. Vernon graben and east of the Spenser Consolidated oil field, the depth to Eau Claire Formation apparently increases by approximately 60 m (197 ft) over a horizontal distance of 1.4 km (0.9 mi). Minor faulting east of the Spencer Consolidated field appears to be synthetic to the Hovey lake fault, which bounds the eastern side of the Mt. Vernon graben. Tentative interpretations of faulting and weak reflections from depths greater than 4.5 km (15,000 ft) may be clarified by additional data processing and by additional seismic profiling planned by ARPEX.

Rene, R.M.; Hester, N.C.; Stanonis, F.L. (Indiana Univ., Bloomington (USA))

1989-08-01T23:59:59.000Z

469

Performance of "Moth Eye" Anti-Reflective Coatings for Solar Cell Applications  

SciTech Connect (OSTI)

An inexpensive, effective anti-reflective coating (ARC) has been developed at the University of Florida to significantly enhance the absorption of light by silicon in solar cells. This coating has nano-scale features, and its microstructure mimics that of various night active insects (e.g. a moth's eye). It is a square array of pillars, each about 700 nm high and having a diameter of about 300 nm. Samples of silicon having this coating were exposed either to various combinations of either elevated temperature and humidity or to gamma irradiation ({sup 60}Co) at the Savannah River National Laboratory, or to a broad spectrum ultraviolet light and to a 532 nm laser light at the University of Florida. The anti-reflective properties of the coatings were unaffected by any of these environmental stresses, and the microstructure of the coating was also unaffected. In fact, the reflectivity of the gamma irradiated ARC became lower (advantageous for solar cell applications) at wavelengths between 400 and 1000 nm. These results show that this coating is robust and should be tested in actual systems exposed to either weather or a space environment. Structural details of the ARCs were studied to optimize their performance. Square arrays performed better than hexagonal arrays - the natural moth-eye coating is indeed a square array. The optimal depth of the templated nanopillars in the ARC was investigated. A wet etching technology for ARC formation was developed that would be less expensive and much faster than dry etching. Theoretical modeling revealed that dimple arrays should perform better than nipple arrays. A method of fabricating both dimple and nipple arrays having the same length was developed, and the dimple arrays performed better than the nipple arrays, in agreement with the modeling. The commercial viability of the technology is quite feasible, since the technology is scalable and inexpensive. This technology is also compatible with current industrial fabrication of solar cells.

Clark, E.; Kane, M.; Jiang, P.

2011-03-14T23:59:59.000Z

470

Slow and remanent electric polarization of adsorbed BSA layer evidenced by neutron reflection  

E-Print Network [OSTI]

Using neutron reflectivity together with an appropriate electrochemical cell, we have studied the effects of transverse electric field on the Bovine Serum Albumin (BSA) monolayer initially adsorbed at the interface of the aqueous solution and a conductive doped-silicon wafer. Depending on the sign of the initial potential, a second layer is adsorbed on top of the first whereas a subsequent reversal of potential has no effect. We show that this behavior reveals the slow and remanent electric polarization of the first BSA layer and suggest an analogy with spin glasses based on the dipolar structure of this protein.

A. Koutsioubas; D. Lairez; G. Zalczer; F. Cousin

2011-05-27T23:59:59.000Z

471

Reflection of Waterborne acoustic waves from a viscoelastic layer on a rigid hacking with perforations  

Science Journals Connector (OSTI)

The reflection coefficient is calculated for a plane acoustic wave normally incident on a viscoelasticrubber cover layer submerged in water. The rubber layer is mounted on a rigid backing with air?filled cylindrical perforations. Acoustical losses are attributed to motion of the layer over the perforations. This motion is calculated by treating the layer above each perforation as a vibrating circular viscoelastic plate. Different boundary conditions are assumed and in each case the soundreflection coefficient is calculated. The results are compared with the experimental data of R. Lane [Ultrason. 19 28–30 (1981)].

J. Jarzynski

1982-01-01T23:59:59.000Z

472

Study of photomodulated reflectance in 6H-SiC single crystals  

SciTech Connect (OSTI)

The effect of ultraviolet irradiation of the surface of silicon-carbide (6H-SiC) single crystals on their optical reflectivity in the visible and violet spectral regions is studied. It is shown that the photoreflection-signal intensity is maximal, if the light beam is incident at the Brewster angle and polarized parallel to the plane of incidence. The relative change induced in the refractive index of the surface layers of a crystal (10{sup -3}) upon exposure to nitrogen laser radiation, caused by the generation of nonequilibrium free charge carriers in the conduction band of the material, is established.

Gruzintsev, A. N., E-mail: gran@iptm.ru [Russian Academy of Sciences, Institute of Microelectronics Technology and Ultra-High-Purity Materials (Russian Federation)

2013-04-15T23:59:59.000Z

473

Disruption of reflecting Bose-Einstein condensates due to interatomic interactions and quantum noise  

SciTech Connect (OSTI)

We perform fully three-dimensional simulations, using the truncated Wigner method, to investigate the reflection of Bose-Einstein condensates from abrupt potential barriers. We show that the interatomic interactions can disrupt the internal structure of a cigar-shaped cloud with a high atom density at low approach velocities, damping the center-of-mass motion and generating vortices. Furthermore, by incorporating quantum noise we show that scattering halos form at high approach velocities, causing an associated condensate depletion. We compare our results to recent experimental observations.

Scott, R. G.; Hutchinson, D. A. W.; Gardiner, C. W. [The Jack Dodd Centre for Photonics and Ultra-Cold Atoms, Department of Physics, University of Otago, P.O. Box 56, Dunedin (New Zealand)

2006-11-15T23:59:59.000Z

474

Seismic-like scaling regime in impulse reflection from underwater sediment  

Science Journals Connector (OSTI)

A universal scaling law is known empirically to characterize the high-frequency decay of bandpassed seismic coda. An explanation advanced for this universality based on multiple-Rayleigh scatter of nonuniform strength is generic enough to suggest that similar scaling may apply to decay of the impulse response in other random media. A submerged sand layer is probed experimentally as a candidate for such a medium and its incoherent acoustic impulse reflection is found to have an exponential decay regime similar to that in seismology.

Eric Smith

2000-01-01T23:59:59.000Z

475

Neutron reflectivity and small angle neutron scattering: An introduction and perspective on recent progress  

Science Journals Connector (OSTI)

Abstract In recent years both neutron reflectivity, NR, and small angle neutron scattering, SANS, have been applied to the study of increasingly complex surface and interfacial properties. The methodology and advantages of using these neutron scattering techniques to probe surfaces and interfaces will be briefly outlined. Some recent examples of surfactant, polymer and polymer–surfactant adsorption at the air–water, liquid–solid, and liquid–liquid planar interfaces are highlighted. These are contrasted by some examples of the nature of adsorption on colloidal sol particles and emulsion droplets.

Jeffrey Penfold; Robert K. Thomas

2014-01-01T23:59:59.000Z

476

Lapped substrate for enhanced backsurface reflectivity in a thermophotovoltaic energy conversion system  

DOE Patents [OSTI]

A method for fabricating a thermophotovoltaic energy conversion cell including a thin semiconductor wafer substrate (10) having a thickness (.beta.) calculated to decrease the free carrier absorption on a heavily doped substrate; wherein the top surface of the semiconductor wafer substrate is provided with a thermophotovoltaic device (11), a metallized grid (12) and optionally an antireflective (AR) overcoating; and, the bottom surface (10') of the semiconductor wafer substrate (10) is provided with a highly reflecting coating which may comprise a metal coating (14) or a combined dielectric/metal coating (17).

Baldasaro, Paul F (Clifton Park, NY); Brown, Edward J (Clifton Park, NY); Charache, Greg W (Clifton Park, NY); DePoy, David M (Clifton Park, NY)

2000-01-01T23:59:59.000Z

477

THE REFLECTION EFFECT IN INTERACTING BINARIES OR IN PLANET-STAR SYSTEMS  

SciTech Connect (OSTI)

There are many similarities between interacting binary stars and stars with a close-in giant extrasolar planet. The reflection effect is a well-known example. Although the generally accepted treatment of this effect in interacting binaries is successful in fitting light curves of eclipsing binaries, it is not very suitable for studying cold objects irradiated by hot objects or extrasolar planets. The aim of this paper is to develop a model of the reflection effect which could be easily incorporated into the present codes for modeling of interacting binaries so that these can be used to study the aforementioned objects. Our model of the reflection effect takes into account the reflection (scattering), heating, and heat redistribution over the surface of the irradiated object. The shape of the object is described by the non-spherical Roche potential expected for close objects. Limb and gravity darkening are included in the calculations of the light output from the system. The model also accounts for the orbital revolution and rotation of the exoplanet with appropriate Doppler shifts for the scattered and thermal radiation. Subsequently, light curves and/or spectra of several exoplanets have been modeled and the effects of the heat redistribution, limb darkening/brightening, (non-)gray albedo, and non-spherical shape have been studied. Recent observations of planet-to-star flux ratio of HD189733b, WASP12b, and WASP-19b at various phases were reproduced with very good accuracy. It was found that HD189733b has a low Bond albedo and intense heat redistribution, while WASP-19b has a low Bond albedo and low heat redistribution. The exact Roche geometries and temperature distributions over the surface of all 78 transiting extrasolar planets have been determined. Departures from the spherical shape may vary considerably but departures of about 1% in the radius are common within the sample. In some cases, these departures can reach 8%, 12%, or 14%, for WASP-33b, WASP-19b, and WASP-12b, respectively. The mean temperatures of these planets also vary considerably from 300 K to 2600 K. The extreme cases are WASP-18b, WASP-12b, and WASP-33b, with mean temperatures of 2330 K, 2430 K, and 2600 K, respectively.

Budaj, J., E-mail: budaj@ta3.sk [Astronomical Institute, Slovak Academy of Sciences, Tatranska Lomnica 05960 (Slovakia)

2011-02-15T23:59:59.000Z

478

Seismic reflection images of a near-axis melt sill within the lower crust at the Juan de Fuca ridge  

Science Journals Connector (OSTI)

... -axis seamounts with chemistry distinct from the axial lavas (Fig. 4a). Observations by submersible vehicles have also reported the presence of low-temperature hydrothermal venting ?3.3?km ... ratio is 0.25. Reflection coefficients

J. Pablo Canales; Mladen R. Nedimovi?; Graham M. Kent; Suzanne M. Carbotte; Robert S. Detrick

2009-07-02T23:59:59.000Z

479

LANDSTREAMER/GIMBALED GEOPHONE ACQUISITION OF HIGH RESOLUTION SEISMIC REFLECTION DATA NORTH OF THE 200 AREAS HANFORD SITE  

SciTech Connect (OSTI)

Landstreamer Seismic Reflection Vender Report by Confederated Tribes of the Umatilla Indian Reservation and Montana Tech of the University of Montana, collected in FY2009 under CHPRC Contract 35789.

REPASKY TE; HYDE ER; LINK CA; SPEECE MA

2009-11-18T23:59:59.000Z

480

Observed Southern Ocean Cloud Properties and Shortwave Reflection. Part I: Calculation of SW Flux from Observed Cloud Properties  

Science Journals Connector (OSTI)

The sensitivity of the reflection of shortwave radiation over the Southern Ocean to the cloud properties there is estimated using observations from a suite of passive and active satellite instruments in combination with radiative transfer ...

Daniel T. McCoy; Dennis L. Hartmann; Daniel P. Grosvenor

Note: This page contains sample records for the topic "reflection radiometer aster" from the National Library of EnergyBeta (NLEBeta).
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481

Estimation of Ground-Level Reflectivity Factor in Operational Weather Radar Networks Using VPR-Based Correction Ensembles  

Science Journals Connector (OSTI)

An operational method is presented that corrects the bias of radar-based quantitative precipitation estimations (QPE) in radar networks that is due to the vertical profile of reflectivity (VPR) factor. It is used in both rain and snowfall. ...

Jarmo Koistinen; Heikki Pohjola

2014-10-01T23:59:59.000Z

482

On the influence of low initial pressure and detonation stochastic nature on Mach reflection of gaseous detonation waves  

Science Journals Connector (OSTI)

The two-dimensional, time-dependent and reactive Navier–Stokes equations were solved to obtain an insight into Mach reflection of gaseous detonation in a stoichiometric hydrogen-oxygen mixture diluted ... argon. ...

C. J. Wang; C. M. Guo

2014-09-01T23:59:59.000Z

483

Far-UV reflectance of UHV-prepared Al films and its degradation after exposure to O2  

Science Journals Connector (OSTI)

The far-ultraviolet reflectance of aluminum films prepared and maintained under ultrahigh-vacuum conditions was measured for wavelengths ranging from 82.6 to 120.0 nm. The degradation...

Larruquert, J I; Méndez, J A; Aznárez, J A

1994-01-01T23:59:59.000Z

484

Investigation of active faulting at the Emigrant Peak fault in Nevada using shallow seismic reflection and ground penetrating radar  

E-Print Network [OSTI]

The objective of this study was to assess fault displacement, off-fault deformation, and alluvial fan stratigraphy at the Emigrant Peak fault zone (EPFZ) in Fish Lake Valley, Nevada utilizing shallow seismic reflection (SSR) and ground penetrating...

Christie, Michael Wayne

2007-12-18T23:59:59.000Z

485

Student Preparedness Checklist K I have completed the emergency contact information in my Banner Pipeline and it accurately reflects  

E-Print Network [OSTI]

Pipeline and it accurately reflects how I want to be notified in case of an emergency. (www.pipeline. (Sign into your account at www.pipeline.wayne.edu and follow the link for Broadcast Messaging.) K My

Finley Jr., Russell L.

486

High-resolution shear-wave reflection profiling to image offset in unconsolidated near-surface sediments.  

E-Print Network [OSTI]

??S-wave reflection profiling has many theoretical advantages, when compared to P-wave profiling, such as high-resolution potential, greater sensitivities to lithologic changes and insensitivity to the… (more)

Bailey, Bevin

2014-01-01T23:59:59.000Z

487

Relation between Group Delay, Energy Storage and Absorbed/Scattered Power in Highly Reflective Dispersive Dielectric Mirror Coatings  

Science Journals Connector (OSTI)

We show that the reflection group delay as well as the absorption/scattering loss of a dielectric multilayer mirror is proportional to the energy stored in such 1-D photonic bandgap...

Szipocs, Róbert; Antal, Peter

488

Seismic reflection evidence for two phase development of Tertiary basins from east-central Nevada  

SciTech Connect (OSTI)

Two east-west seismic reflection profiles crossing Antelope Valley, Smokey Valley, Railroad Valley and Big Sand Springs Valley demonstrate the evolution of Tertiary extension from broad sags to narrow, fault-bounded basins. Seismic reflection data was acquired for the Anschutz Corporation by the Digicon Corporation during the winter of 1988/1989. Reprocessing of a 480 channel, 60 fold, dynamite source experiment enabled good imaging of the basin stratigraphy. These data suggest two distinct phases of basin development occurred, separated by a regional unconformity. The early phase is characterized by development of a broad basin riddled with many small offset normal faults. The later phase shows a narrowing of the basin and subsidence along one dominant structure, an apparent planar normal fault. The unconformity separating the two phases of extension marks a transition from broad subsidence to local asymmetric tilting that took place over a short period of time relative to sedimentation rates. Antelope Valley and Railroad Valley clearly show strong evidence for two phase development, whereas Smokey Valley represents mostly the early phase and Big Sand Springs Valley represents only the later phase of extension. The absence of dating within the basins precludes the authors from determining if the abrupt tectonic transition within the basins resulted from differences in local strain rates or amounts, or was due to changes in regional stress fields.

Liberty, L.M.; Heller, P.L.; Smithson, S.B. (Univ. of Wyoming, Laramie, WY (United States). Dept. of Geology and Geophysics)

1993-04-01T23:59:59.000Z

489

Propagating and reflecting of spin wave in permalloy nanostrip with 360° domain wall  

SciTech Connect (OSTI)

By micromagnetic simulation, we investigated the interaction between propagating spin wave (or magnonic) and a 360° domain wall in a nanostrip. It is found that propagating spin wave can drive a 360° domain wall motion, and the velocity and direction are closely related to the transmission coefficient of the spin wave of the domain wall. When the spin wave passes through the domain wall completely, the 360° domain wall moves toward the spin wave source. When the spin wave is reflected by the domain wall, the 360° domain wall moves along the spin wave propagation direction. Moreover, when the frequency of the spin wave is coincident with that of the 360° domain wall normal mode, the 360° domain wall velocity will be resonantly enhanced no matter which direction the 360 DW moves along. On the other hand, when the spin wave is reflected from the moving 360° domain wall, we observed the Doppler effect clearly. After passing through a 360° domain wall, the phase of the spin wave is changed, and the phase shift is related to the frequency. Nevertheless, phase shift could be manipulated by the number of 360° domain walls that spin wave passing through.

Zhang, Senfu; Mu, Congpu; Zhu, Qiyuan; Zheng, Qi; Liu, Xianyin; Wang, Jianbo; Liu, Qingfang, E-mail: liuqf@lzu.edu.cn [Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000 (China)

2014-01-07T23:59:59.000Z

490

A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN  

SciTech Connect (OSTI)

Cassini/VIMS T85 observations of a solar specular reflection off of Kivu Lacus (87.°4N 241.°1E) provide an empirical transmission spectrum of Titan's atmosphere. Because this observation was acquired from short range (33,000 km), its intensity makes it visible within the 2.0, 2.7, and 2.8 ?m atmospheric windows in addition to the 5 ?m window where all previous specular reflections have been seen. The resulting measurement of the total one-way normal atmospheric optical depth (corresponding to haze scattering plus haze and gas absorption) provides strong empirical constraints on radiative transfer models. Using those models, we find that the total haze column abundance in our observation is 20% higher than the Huygens equatorial value. Ours is the first measurement in the 2-5 ?m wavelength range that probes all the way to the surface in Titan's arctic, where the vast majority of surface liquids are located. The specular technique complements other probes of atmospheric properties such as solar occultations and the direct measurements from Huygens. In breaking the degeneracy between surface and atmospheric absorptions, our measured optical depths will help to drive future calculations of deconvolved surface albedo spectra.

Barnes, Jason W. [Department of Physics, University of Idaho, Moscow, ID 83844-0903 (United States); Clark, Roger N. [United States Geological Survey, Denver, CO 80225 (United States); Sotin, Christophe; Buratti, Bonnie J. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 (United States); Ádámkovics, Máté [Department of Astronomy, University of California Berkeley, Berkeley, CA 94720-3411 (United States); Appéré, Thomas; Rodriguez, Sebastien [Laboratoire AIM, Université Paris Diderot, Paris 7/CNRS/CEA-Saclay, DSM-IRFU/SAp, F-91191 Gif sur Yvette (France); Soderblom, Jason M. [Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139-4307 (United States); Brown, Robert H. [Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721 (United States); Baines, Kevin H. [Space Science and Engineering Center, University of Wisconsin-Madison, Madison, WI, 53706 (United States); Le Mouélic, Stéphane [Laboratoire de Planétologie et Géodynamique, Université de Nantes, F-44322 Nantes (France); Nicholson, Philip D., E-mail: jwbarnes@uidaho.edu [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States)

2013-11-10T23:59:59.000Z

491

A REFLECTION MODEL FOR THE CYCLOTRON LINES IN THE SPECTRA OF X-RAY PULSARS  

SciTech Connect (OSTI)

Cyclotron resonance scattering features observed in the spectra of some X-ray pulsars show significant changes of the line energy with the pulsar luminosity. At high luminosities, these variations are often associated with the onset and growth of the accretion column, which is believed to be the origin of the observed emission and of the cyclotron lines. However, this scenario inevitably implies a large gradient of the magnetic field strength within the line-forming region, which makes the formation of the observed line-like features problematic. Moreover, the observed variation of the cyclotron line energy is much smaller than could be anticipated for the corresponding luminosity changes. We argue here that a more physically realistic situation is that the cyclotron line forms when the radiation emitted by the accretion column is reflected from the neutron star surface, where the gradient of the magnetic field strength is significantly smaller. Here we develop a reflection model and apply it to explain the observed variations of the cyclotron line energy in a bright X-ray pulsar V 0332+53 over a wide range of luminosities.

Poutanen, Juri; Mushtukov, Alexander A.; Tsygankov, Sergey S.; Nagirner, Dmitrij I. [Astronomy Division, Department of Physics, P.O. Box 3000, FI-90014 University of Oulu (Finland); Suleimanov, Valery F.; Doroshenko, Victor [Institut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Universität Tübingen, Sand 1, D-72076 Tübingen (Germany); Lutovinov, Alexander A., E-mail: juri.poutanen@oulu.fi [Space Research Institute of the Russian Academy of Sciences, Profsoyuznaya Str. 84/32, Moscow 117997 (Russian Federation)

2013-11-10T23:59:59.000Z

492

A value sensitive action-reflection model: evolving a co-design space with stakeholder and designer prompts  

Science Journals Connector (OSTI)

We introduce a design method for evolving a co-design space to support stakeholders untrained in design. Specifically, the purpose of the method is to expand and shape a co-design space so that stakeholders, acting as designers, focus not only on the ... Keywords: co-design, creativity, design method, envisioning cards, homeless young people, mobile technologies, prototyping, reflection-on-action, safety, security, value scenarios, value sensitive action-reflection model, value sensitive design

Daisy Yoo; Alina Huldtgren; Jill Palzkill Woelfer; David G. Hendry; Batya Friedman

2013-04-01T23:59:59.000Z

493

Subluminal and superluminal parametric doppler effects in the case of light reflection from a moving smooth medium inhomogeneity  

SciTech Connect (OSTI)

The reflection of test radiation from a smooth inhomogeneity of medium characteristics propagating with a subluminal or superluminal velocity is analyzed. The equations describing the propagation of the forward- and counter-propagating waves in such an inhomogeneous medium are derived. Quasi-phase conjugation is demonstrated in the case of superluminal inhomogeneities. The Bragg resonance conditions are formulated and the conditions for increasing the reflection coefficient of radiation from an inhomogeneity are discussed.

Rozanov, N. N., E-mail: nrosanov@yahoo.com [Vavilov State Optical Institute (Russian Federation)

2012-12-15T23:59:59.000Z

494

High-resolution shear-wave reflection profiling to image offset in unconsolidated near-surface sediments  

E-Print Network [OSTI]

High-resolution shear-wave reflection profiling to image offset in unconsolidated near-surface sediments By Copyright 2014 Bevin L. Bailey Submitted to the Department of Geology and the Graduate Faculty of the University of Kansas... offset in unconsolidated near-surface sediments ________________________________ Chairperson Richard D. Miller Date approved: April 4th, 2014 iii Abstract S-wave reflection profiling has many theoretical...

Bailey, Bevin

2014-05-31T23:59:59.000Z

495

Comparing local vs. global visible and near-infrared (VisNIR) diffuse reflectance spectroscopy (DRS) calibrations for the prediction of soil clay, organic C  

E-Print Network [OSTI]

Comparing local vs. global visible and near-infrared (VisNIR) diffuse reflectance spectroscopy (DRS Elsevier B.V. All rights reserved. 1. Introduction Visible and near-infrared (VisNIR) diffuse reflectance

Lawrence, Rick L.

496

LONG-TERM GOAL The long-term goal of this research project is to determine if energy reflectance measurements can  

E-Print Network [OSTI]

of newborn hearing screening and when middle-ear fluid is suspected. Energy reflectance measures provide al. 2008). Here, we present measurements of energy reflectance on normal-hearing, healthy newborn with permission from Navid Shahnaz.) Keefe et al. (2000) reported energy reflectance (ER) measurements from

Voss, Susan E.

497

Effect of reflection on H emissions in Alcator C-Mod C. F. F. Karney, D. P. Stotler, C. H. Skinner  

E-Print Network [OSTI]

the Doppler shift, Zeeman effect, and Stark broadening; include the effect of wall reflections. Degas 2Effect of reflection on H emissions in Alcator C-Mod C. F. F. Karney, D. P. Stotler, C. H. Skinner modeled with the Degas 2 code including the effects of wall reflection. By assuming that the first wall

Karney, Charles

498

Residential Prices Do Not Reflect the Volatility Seen in Wellhead Prices  

Gasoline and Diesel Fuel Update (EIA)

5 5 Notes: A key concern about the level of current wellhead prices is the impact on consumers, especially residential and small-volume commercial customers Using monthly average prices for residential customers and daily Henry Hub spot prices for the past 4 winters: significant price fluctuations are apparent at the Henry Hub, but residential prices respond relatively less. The major reasons for the lesser response in residential prices are: Gas supplies to residential customers generally are arranged prior to delivery, and agreed price terms, while flexible, generally do not fully reflect contemporaneous wellhead price shifts Gas commodity charges are a fraction of the delivery price for small customers-averaging about 33 percent during the heating season. Costs of

499

Real-time reflectance-difference spectroscopy of GaAs molecular beam epitaxy homoepitaxial growth  

SciTech Connect (OSTI)

We report on real time-resolved Reflectance-difference (RD) spectroscopy of GaAs(001) grown by molecular beam epitaxy, with a time-resolution of 500 ms per spectrum within the 2.3–4.0 eV photon energy range. Through the analysis of transient RD spectra we demonstrated that RD line shapes are comprised of two components with different physical origins and determined their evolution during growth. Such components were ascribed to the subsurface strain induced by surface reconstruction and to surface stoichiometry. Results reported in this paper render RD spectroscopy as a powerful tool for the study of fundamental processes during the epitaxial growth of zincblende semiconductors.

Lastras-Martínez, A., E-mail: alm@cactus.iico.uaslp.mx, E-mail: alastras@gmail.com; Ortega-Gallegos, J.; Guevara-Macías, L. E.; Nuñez-Olvera, O.; Balderas-Navarro, R. E.; Lastras-Martínez, L. F. [Instituto de Investigación en Comunicación Optica, Universidad Autónoma de San Luis Potosí, Alvaro Obregón 64, San Luis Potosí, SLP 78000 (Mexico); Lastras-Montaño, L. A. [IBM T. J. Watson Research Center, Yorktown Heights, New York 10598 (United States); Lastras-Montaño, M. A. [Department of Electrical and Computer Engineering, University of California, Santa Barbara, Santa Barbara, California 93106 (United States)

2014-03-01T23:59:59.000Z

500

Real Estate market, energy rating and cost. Reflections about an Italian case study  

Science Journals Connector (OSTI)

The Directive EPBD introduced Energy Performance Certificate (EPC) an energy policy tool. The aim of EPC is to inform building buyer about energy performance (and energy cost) of buildings. They represent a specific energy policy tool to orientate building sector and retail market toward higher energy efficiency building. The Real Estate market was built in different periods, and in each of these periods the building envelope or the heating plant had different kinds of energy performance. Therefore, in real estate, each building-period has a determinate incidence respect total existing buildings, and they have different energy consumption incidence respect total energy national consumption. The EPBD recast highlight the relation between building elements or technical building system, energy rating and cost-optimal levels of minimum energy performance requirements. In present paper a discussion about Directive's news, Italian EPC and real estate market prospective is presented. Furthermore we proposed a reflection about link between energy cost, energy rating and building property value.

Kristian Fabbri; Lamberto Tronchin; Valerio Tarabusi

2011-01-01T23:59:59.000Z