Sample records for latitude tilt solar

  1. Solar: monthly latitude tilt GIS data at 40km resolution for...

    Open Energy Info (EERE)

    potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented due south...

  2. Tilt assembly for tracking solar collector assembly

    DOE Patents [OSTI]

    Almy, Charles; Peurach, John; Sandler, Reuben

    2012-01-24T23:59:59.000Z

    A tilt assembly is used with a solar collector assembly of the type comprising a frame, supporting a solar collector, for movement about a tilt axis by pivoting a drive element between first and second orientations. The tilt assembly comprises a drive element coupler connected to the drive element and a driver, the driver comprising a drive frame, a drive arm and a drive arm driver. The drive arm is mounted to the drive frame for pivotal movement about a drive arm axis. Movement on the drive arm mimics movement of the drive element. Drive element couplers can extend in opposite directions from the outer portion of the drive arm, whereby the assembly can be used between adjacent solar collector assemblies in a row of solar collector assemblies.

  3. Revisiting the question: Does high-latitude solar activity lead low-latitude solar activity in time phase?

    SciTech Connect (OSTI)

    Kong, D. F.; Qu, Z. N. [Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011 (China); Guo, Q. L., E-mail: kdf@ynao.ac.cn [College of Mathematics Physics and Information Engineering, Jiaxing University, Jiaxing 314001 (China)

    2014-05-01T23:59:59.000Z

    Cross-correlation analysis and wavelet transform methods are used to investigate whether high-latitude solar activity leads low-latitude solar activity in time phase or not, using the data of the Carte Synoptique solar filaments archive from 1919 March to 1989 December. From the cross-correlation analysis, high-latitude solar filaments have a time lead of 12 Carrington solar rotations with respect to low-latitude ones. Both the cross-wavelet transform and wavelet coherence indicate that high-latitude solar filaments lead low-latitude ones in time phase. Furthermore, low-latitude solar activity is better correlated with high-latitude solar activity of the previous cycle than with that of the following cycle, which is statistically significant. Thus, the present study confirms that high-latitude solar activity in the polar regions is indeed better correlated with the low-latitude solar activity of the following cycle than with that of the previous cycle, namely, leading in time phase.

  4. Solar Schools Assessment and Implementation Project: Financing...

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

    the annual solar resource data for different latitudes. 5 To maximize the annual energy production at a location of 40 north latitude, the optimal tilt varies from 30...

  5. Temporal variations of solar rotation rate at high latitudes

    E-Print Network [OSTI]

    H. M. Antia; Sarbani Basu

    2001-08-14T23:59:59.000Z

    Frequency splitting coefficients from Global Oscillation Network Group (GONG) and Michelson Doppler Imager (MDI) observations covering the period 1995--2001 are used to study temporal variations in the solar rotation rate at high latitudes. The torsional oscillation pattern in the Sun is known to penetrate to a depth of about $0.1R_\\odot$ with alternate bands of faster and slower rotating plasma. At lower latitudes the bands move towards equator with time. At higher latitudes, however, the bands appear to move towards the poles. This is similar to the observed pole-ward movement of large scale magnetic fields at high latitudes. This also supports theoretical results of pole-ward moving bands at high latitudes in some mean field dynamo models. The polar rotation rate is found to decrease between 1995 and 1999 after which it has started increasing.

  6. Role of latitude of source region in Solar Energetic Particle events

    E-Print Network [OSTI]

    Sanahuja, Blai

    PR1 2HE, UK Department of Physics, University of Helsinki, 00014 Helsinki, Finland Abstract. Solar up to near- relativistic energies. Some of these particles can escape the solar atmosphere and travelRole of latitude of source region in Solar Energetic Particle events S. Dalla and N. Agueda1

  7. SOLAR WIND HELIUM ABUNDANCE AS A FUNCTION OF SPEED AND HELIOGRAPHIC LATITUDE: VARIATION THROUGH A SOLAR CYCLE

    E-Print Network [OSTI]

    Richardson, John

    SOLAR WIND HELIUM ABUNDANCE AS A FUNCTION OF SPEED AND HELIOGRAPHIC LATITUDE: VARIATION THROUGH of the variation of the relative abundance of helium to hydrogen in the solar wind as a function of solar wind theoretical work in which enhancements of coronal helium lead to stagnation of the escaping proton flux

  8. LOOKING FOR VARIATIONS WITH LATITUDE OF THE BASE OF THE SOLAR CONVECTION ZONE

    E-Print Network [OSTI]

    Monteiro, Mário João

    819 LOOKING FOR VARIATIONS WITH LATITUDE OF THE BASE OF THE SOLAR CONVECTION ZONE M Astronomy Unit, School of Mathematical Sciences, Queen Mary & Westfield College, Mile End Road, London El 4 successfully in determining the basic characteristics of the base of the solar convec- tive region (e

  9. THE ROTATION PROFILE OF SOLAR MAGNETIC FIELDS BETWEEN {+-}60 Degree-Sign LATITUDES

    SciTech Connect (OSTI)

    Shi, X. J.; Xie, J. L., E-mail: shixiangjun@ynao.ac.cn [Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011 (China)

    2013-08-10T23:59:59.000Z

    Through a cross-correlation analysis of the Carrington synoptic maps of solar photospheric magnetic fields from Carrington Rotation Nos. 1625 to 2129 (from 1975 February to 2012 October), the sidereal rotation rates of solar magnetic fields between {+-}60 Degree-Sign latitudes are investigated. It seems that the temporal variation of rotation rates should be related to the solar cycle phase. The rotation profile of magnetic fields is obtained: the sidereal rotation rates decrease from the equator to mid-latitude and reach their minimum values of about 13.16 deg day{sup -1} (13.17 deg day{sup -1}) at 53 Degree-Sign (54 Degree-Sign ) latitude in the northern (southern) hemisphere, then increase toward higher latitudes. This rotation profile is different from the differential rotation law obtained by Snodgrass from a cross-correlation analysis of daily magnetograms, in which the rotation rates show a steep decrease from the equator to the poles. However, it is much closer to the quasi-rigid rotation law derived by Stenflo from an auto-correlation analysis of daily magnetograms. Some possible interpretations are discussed for the resulting rotation profile.

  10. Determination of the optimum inclination of a flat solar collector in function of latitude and local climatic data

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    569 Determination of the optimum inclination of a flat solar collector in function of latitude of a solar collector, it is necessary to reduce its size to a minimum for a given collected energy of equations described in this work were developed to determine the inclination angle of a . flat solar

  11. THE HIGH-LATITUDE BRANCH OF THE SOLAR TORSIONAL OSCILLATION IN THE RISING PHASE OF CYCLE 24

    SciTech Connect (OSTI)

    Howe, R. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Christensen-Dalsgaard, J. [Stellar Astrophysics Centre, Department of Physics and Astronomy, Ny Munkegade 120, Aarhus University, DK-8000 Aarhus C (Denmark); Hill, F.; Komm, R. [National Solar Observatory, P.O. Box 26732, Tucson, AZ 85726-6732 (United States); Larson, T. P.; Schou, J. [HEPL Solar Physics, 452 Lomita Mall, Stanford University, Stanford, CA 94305-4085 (United States); Rempel, M.; Thompson, M. J., E-mail: rhowe@nso.edu [High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 (United States)

    2013-04-10T23:59:59.000Z

    We use global heliseismic data from the Global Oscillation Network Group, the Michelson Doppler Imager on board the Solar and Heliospheric Observatory, and the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory, to examine the behavior, during the rising phase of Solar Cycle 24, of the migrating zonal flow pattern known as the torsional oscillation. Although the high-latitude part of the pattern appears to be absent in the new cycle when the flows are derived by subtracting a mean across a full solar cycle, it can be seen if we subtract the mean over a shorter period in the rising phase of each cycle, and these two mean rotation profiles differ significantly at high latitudes. This indicates that the underlying high-latitude rotation has changed; we speculate that this is in response to weaker polar fields, as suggested by a recent model.

  12. Dynamo Saturation in Rapidly Rotating Solar-Type Stars

    E-Print Network [OSTI]

    Kitchatinov, L L

    2015-01-01T23:59:59.000Z

    The magnetic activity of solar-type stars generally increases with stellar rotation rate. The increase, however, saturates for fast rotation. The Babcock-Leighton mechanism of stellar dynamos saturates as well when the mean tilt-angle of active regions approaches ninety degrees. Saturation of magnetic activity may be a consequence of this property of the Babcock-Leighton mechanism. Stellar dynamo models with a tilt-angle proportional to the rotation rate are constructed to probe this idea. Two versions of the model - treating the tilt-angles globally and using Joy's law for its latitude dependence - are considered. Both models show a saturation of dynamo-generated magnetic flux at high rotation rates. The model with latitude-dependent tilt-angles shows also a change in dynamo regime in the saturation region. The new regime combines a cyclic dynamo at low latitudes with an (almost) steady polar dynamo.

  13. Analyzing and simulating the variability of solar irradiance and solar PV powerplants

    E-Print Network [OSTI]

    Lave, Matthew S.

    2012-01-01T23:59:59.000Z

    Optimum tilt of a solar collector, Solar & Wind Technology,and orientation for solar collector in Brunei Darussalam,Optimum tilt angle for solar collectors. , Energy Sources,

  14. Optimum fixed orientations and benefits of tracking for capturing solar radiation in the continental United States

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan

    2011-01-01T23:59:59.000Z

    Optimum tilt of a solar collector, Solar & Wind Technology.and orientation for solar collector in Brunei Darussalam,Optimum tilt angle for solar collectors, Energy Sources.

  15. ON THE ORIGIN OF MID-LATITUDE FAST WIND: CHALLENGING THE TWO-STATE SOLAR WIND PARADIGM

    E-Print Network [OSTI]

    Stakhiv, Mark

    The bimodal paradigm of solar wind describes a slow solar wind situated near the heliospheric current sheet while a fast wind overexpands from the poles to fill in the remainder of the heliosphere. In this paper, we challenge ...

  16. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    for Reno, Nevada . . . . . (Q) Solar Data for China Lake/using Nominal Solar Profiles China Lake/Inyokern ANGLE OFStations - China Lake, Edwards Monthly Latitude: Jan SOLAR

  17. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    Data for San Vicente Reservoir (l) Solar Data for BarrettDiego Monthly Solar Data, Barrett Reservoir Latitude: Janmonth. (L) SOLAR DATA FOR BARRETT RESERVOIR Nearby Climate

  18. The Tilt Intonation Model

    E-Print Network [OSTI]

    Taylor, Paul

    The tilt intonation model facilitates automatic analysis and synthesis of intonation. The analysis algorithm detects intonational events in F0 contours and parameterises them in terms of the continuously varying parameters. ...

  19. Tilted-mirror semiconductor lasers

    SciTech Connect (OSTI)

    Salzman, J.; Lang, R.; Margalit, S.; Yariv, A.

    1985-07-01T23:59:59.000Z

    Broad-area GaAs heterostructure lasers with a tilted mirror were demonstrated for the first time, with the tilted mirror fabricated by etching. These lasers operate in a smooth and stable single lateral mode with a high degree of spatial coherence. The suppression of filamentation manifests itself in a high degree of reproducibility in the near-field pattern.

  20. Impact of 15 Jan 2010 annular solar eclipse on the equatorial and low latitude ionosphere over Indian region from Magnetometer, Ionosonde and GPS observations

    E-Print Network [OSTI]

    Panda, Sampad Kumar; Rajaram, Girija; Sripathi, Samireddipalle; Bhaskar, Ankush

    2015-01-01T23:59:59.000Z

    The annular eclipse of Jan 15, 2010 over southern India was studied with a network of multi-instrumental observations consisting magnetometer, ionosonde and GPS receivers. By selecting the day before and the normal EEJ days as the control days, it is intrinsically proved that the regular eastward electric field for the whole day at the equator was not just weakened but actually was flipped for several hours by the influence of tides related to the spectacular Sun-Moon-Earth alignment near the middle of the day. The effect of flipping the electric field was clearly seen in the equatorial ionosonde data and through the large array of GPS receivers that accomplished the TEC data. The main impact of the change in the electric field was the reduced EIA at all latitudes, with the anomaly crest that shifted towards the equator. The equatorial F-region density profile was also showing an enhanced F region peak in spite of a reduced VTEC. By comparison to the plasma density depletion associated with the temporary lack...

  1. High-latitude dayside energetic precipitation and IMF BZ rotations N. stgaard,1

    E-Print Network [OSTI]

    California at Berkeley, University of

    . Owing to the high latitudes it is unlikely that these electrons were energized on the nightside by the solar wind. The precipitation appears at $77­79° magnetic latitude and coincides with a northward Ionosphere: Auroral ionosphere (2704); 2784 Magnetospheric Physics: Solar wind/magnetosphere interactions

  2. Fluid observers and tilting cosmology

    E-Print Network [OSTI]

    A. A. Coley; S. Hervik; W. C. Lim

    2006-05-24T23:59:59.000Z

    We study perfect fluid cosmological models with a constant equation of state parameter $\\gamma$ in which there are two naturally defined time-like congruences, a geometrically defined geodesic congruence and a non-geodesic fluid congruence. We establish an appropriate set of boost formulae relating the physical variables, and consequently the observed quantities, in the two frames. We study expanding spatially homogeneous tilted perfect fluid models, with an emphasis on future evolution with extreme tilt. We show that for ultra-radiative equations of state (i.e., $\\gamma>4/3$), generically the tilt becomes extreme at late times and the fluid observers will reach infinite expansion within a finite proper time and experience a singularity similar to that of the big rip. In addition, we show that for sub-radiative equations of state (i.e., $\\gamma < 4/3$), the tilt can become extreme at late times and give rise to an effective quintessential equation of state. To establish the connection with phantom cosmology and quintessence, we calculate the effective equation of state in the models under consideration and we determine the future asymptotic behaviour of the tilting models in the fluid frame variables using the boost formulae. We also discuss spatially inhomogeneous models and tilting spatially homogeneous models with a cosmological constant.

  3. Soiling losses for solar photovoltaic systems in California

    E-Print Network [OSTI]

    Mejia, Felipe A; Kleissl, Jan

    2013-01-01T23:59:59.000Z

    accumulation of dust on solar panels that causes a decreasenecessity of cleaning solar panels in California. In Sectionand tilt angle of the solar panels. 2.2 Solar Conversion

  4. TILT STABILITY, UNIFORM QUADRATIC GROWTH, AND STRONG ...

    E-Print Network [OSTI]

    2012-05-08T23:59:59.000Z

    Tilt stability, variational analysis, subdifferentials, quadratic growth, strong metric .... Some convex analysis. ..... Example 3.5 (Failure of subdifferential continuity).

  5. BEAM TILTED CORRELATIONS Frank Vignola

    E-Print Network [OSTI]

    Oregon, University of

    from the modules, module temperature, ambient temperature, wind speed, incident solar radiation under standardized operation conditions (25 Celsius and 1000 watts/meter2 incident solar radiation and comprehensive solar radiation data. Specifically, these models were designed to use the National Solar Radiation

  6. Conjugate High Latitude Measurements along the 40 Magnetic Meridian

    E-Print Network [OSTI]

    Michigan, University of

    12 Volt system Six 40 Wae Solar Panels Sixteen 100 Ah AGM sealed leadConjugate High Latitude Measurements along the 40 Magnetic Meridian: Autonomous Adaptive Low-Power the 2014 season marked as red squares. #12;Autonomous Adaptive Low-Power Instrument

  7. Effects of solar photovoltaic panels on roof heat transfer

    E-Print Network [OSTI]

    Dominguez, Anthony; Kleissl, Jan; Luvall, Jeffrey C

    2011-01-01T23:59:59.000Z

    comesfromboththesolarpanelandtheskyweightedbytheundersideofthetiltedsolarpanelsandthesurfaceofofaroof underneathasolarpanelcomparedtothatofan

  8. Effects of solar photovoltaic panels on roof heat transfer

    E-Print Network [OSTI]

    Dominguez, Anthony; Kleissl, Jan; Luvall, Jeffrey C

    2011-01-01T23:59:59.000Z

    theundersideofthetiltedsolarpanelsandthesurfaceoftheroofunderthesolarpanel(Fig. 2). Anairtemperatureofthe solarpanelissimilartotheroof

  9. Notes 16. Analysis of tilting pad bearings

    E-Print Network [OSTI]

    San Andres, Luis

    2010-01-01T23:59:59.000Z

    NOTES 16. STATIC AND DYNAMIC FORCED PERFORMANCE OF TILTING PAD BEARINGS: ANALYSIS INCLUDING PIVOT STIFFNESS Dr. Luis San Andr?s Mast-Childs Professor August 2010 SUMMARY Work in progress ? still a lot of be done Introduction... Figure 1 shows a tilting pad journal bearing comprised of four pads. Each pad tilts about its pivot making a hydrodynamic film that generates a pressure reacting to the static load applied on the spinning journal. This type of bearing is typically...

  10. Large optics inspection, tilting, and washing stand

    DOE Patents [OSTI]

    Ayers, Marion Jay; Ayers, Shannon Lee

    2012-10-09T23:59:59.000Z

    A large optics stand provides a risk free means of safely tilting large optics with ease and a method of safely tilting large optics with ease. The optics are supported in the horizontal position by pads. In the vertical plane the optics are supported by saddles that evenly distribute the optics weight over a large area.

  11. Large optics inspection, tilting, and washing stand

    DOE Patents [OSTI]

    Ayers, Marion Jay (Brentwood, CA); Ayers, Shannon Lee (Brentwood, CA)

    2010-08-24T23:59:59.000Z

    A large optics stand provides a risk free means of safely tilting large optics with ease and a method of safely tilting large optics with ease. The optics are supported in the horizontal position by pads. In the vertical plane the optics are supported by saddles that evenly distribute the optics weight over a large area.

  12. Tilting mirror strips in a linear Fresnel reector Gang Xiao (University of Nice, France)

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Tilting mirror strips in a linear Fresnel reector Gang Xiao (University of Nice, France) February 29, 2012 Abstract When a linear Fresnel reector solar concentrator is installed in a site with high of the linear Fresnel reector. Technical restrictions and diculties of this method are also discussed

  13. Photovoltaic solar concentrator

    DOE Patents [OSTI]

    Nielson, Gregory N.; Okandan, Murat; Resnick, Paul J.; Cruz-Campa, Jose Luis

    2012-12-11T23:59:59.000Z

    A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

  14. Elliptical model of cutoff boundaries for the solar energetic particles measured by POES satellites in December 2006

    E-Print Network [OSTI]

    Dmitriev, A V; Tsai, L -C

    2013-01-01T23:59:59.000Z

    Experimental data from a constellation of five NOAA POES satellites were used for studying the penetration of solar energetic particles (SEP) to high latitudes during long-lasting SEP events on December 5 to 15, 2006. We determined cutoff latitudes for electrons with energies >100 keV and > 300 keV, and protons with energies from 240 keV to >140 MeV. The large number of satellites allowed us to derive snap shots of the cutoff boundaries with 1-hour time resolution. The boundaries were fitted well by ellipses. Based on the elliptical approach, we developed a model of cutoff latitudes for protons and electrons in the northern and southern hemispheres. The cutoff latitude is represented as a function of rigidity, R, of particles, MLT, geomagnetic indices: Dst, Kp, AE, and dipole tilt angle PS. The model predicts tailward and duskward shifting of the cutoff boundaries in relation to intensification of the cross-tail current, field-aligned currents, and symmetrical and asymmetrical parts of the ring current. The m...

  15. Use of Renewable Energy in Buildings: Experiences With Solar Thermal Utilization

    E-Print Network [OSTI]

    Wang, R.; Zhai, X.

    2006-01-01T23:59:59.000Z

    collectors on the south tilted roofs, south walls, balconies or awnings. Experiences on solar thermal utilization are mainly introduced in this paper, which include solar hot water systems with different design methods in residential buildings and solar-powered...

  16. 3, 10811107, 2003 Mid-latitude ozone

    E-Print Network [OSTI]

    Boyer, Edmond

    ACPD 3, 10811107, 2003 Mid-latitude ozone changes in a 3D CTM M. P. Chipperfield Title Page-dimensional model study of long-term mid-high latitude lower stratosphere ozone changes M. P. Chipperfield School1107, 2003 Mid-latitude ozone changes in a 3D CTM M. P. Chipperfield Title Page Abstract Introduction

  17. Project focus: Complete design of an interactive solar panel system to be situated on

    E-Print Network [OSTI]

    Project focus: · Complete design of an interactive solar panel system to be situated on top the effective area · Two types of solar cells: · 3 panel configurations: · Real-time power output data Si panels with 30.0o tilt c) 10 CdTe panels; 38.5o tilt · Solar insolation recorder, thermometer

  18. Combined Scanning Transmission Electron Microscopy Tilt- and Focal Series

    SciTech Connect (OSTI)

    Dahmen, Tim [German Research Center for Artificial Intelligence (DFKI), Germany] [German Research Center for Artificial Intelligence (DFKI), Germany; Baudoin, Jean-Pierre G [ORNL] [ORNL; Lupini, Andrew R [ORNL] [ORNL; Kubel, Christian [Karlsruhe Institute of Technology, Leopoldshafen, Germany] [Karlsruhe Institute of Technology, Leopoldshafen, Germany; Slusallek, Phillip [German Research Center for Artificial Intelligence (DFKI), Germany] [German Research Center for Artificial Intelligence (DFKI), Germany; De Jonge, Niels [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    In this study, a combined tilt- and focal series is proposed as a new recording scheme for high-angle annular dark-field scanning transmission electron microscopy (STEM) tomography. Three-dimensional (3D) data were acquired by mechanically tilting the specimen, and recording a through-focal series at each tilt direction. The sample was a whole-mount macrophage cell with embedded gold nanoparticles. The tilt focal algebraic reconstruction technique (TF-ART) is introduced as a new algorithm to reconstruct tomograms from such combined tilt- and focal series. The feasibility of TF-ART was demonstrated by 3D reconstruction of the experimental 3D data. The results were compared with a conventional STEM tilt series of a similar sample. The combined tilt- and focal series led to smaller missing wedge artifacts, and a higher axial resolution than obtained for the STEM tilt series, thus improving on one of the main issues of tilt series-based electron tomography.

  19. LANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS

    E-Print Network [OSTI]

    California at Berkeley, University of

    ). The top three panels correspond to the southern segment of the solar minimum orbit; repeated passesLANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS R. J at the electron plasma frequency) during the solar minimum and solar maximum orbits of Ulysses. At high latitudes

  20. Solar Energy Development Assistance for Fort Hunter Liggett

    SciTech Connect (OSTI)

    Russo, Bryan J.; Hoffman, Michael G.; Chvala, William D.

    2011-03-30T23:59:59.000Z

    Pacific Northwest National Laboratory provided assistance to Fort Hunter Liggett to determine the opportunities for solar energy development on the site. Increasing use of renewable energy is mandated by several executive orders and legislation. Fort Hunter Liggett has many attributes that enhance its suitability for renewable energy development. First, the site is located south of San Francisco in a remote portion of the costal foothills. Brush and forest fires are frequent and often result in power outages, which subsequently impacts the sites training mission. In addition, the sites blended electric rate during fiscal year (FY) 2010 was high at 12 /kWh. Lastly, the solar resource is moderately high; the site receives nearly 5.7 kWh/m2/day on a south facing, latitude-tilted surface. In light of these factors, the site is a clear candidate for a solar photovoltaic array. Prior to Pacific Northwest National Laboratorys (PNNL) involvement, the site secured funding for a 1 megawatt (MW) photovoltaic (PV) array that will also provide shading for site vehicles. To best implement this project, PNNL conducted a site visit and was tasked with providing the site technical guidance and support regarding module selection, array siting, and other ancillary issues.

  1. The cost of noise reduction in commercial tilt rotor aircraft

    E-Print Network [OSTI]

    Faulkner, Henry B.

    1974-01-01T23:59:59.000Z

    The relationship between direct operating cost and departure noise annoyance was developed for commercial tilt rotor aircraft. This was accomplished by generating a series of tilt rotor aircraft designs to meet various ...

  2. A Babcock-Leighton solar dynamo model with multi-cellular meridional circulation in advection- and diffusion-dominated regimes

    E-Print Network [OSTI]

    Belucz, Bernadett; Forgacs-Dajka, Emese

    2015-01-01T23:59:59.000Z

    Babcock-Leighton type solar dynamo models with single-celled meridional circulation are successful in reproducing many solar cycle features. Recent observations and theoretical models of meridional circulation do not indicate a single-celled flow pattern. We examine the role of complex multi-cellular circulation patterns in a Babcock-Leighton solar dynamo in advection- and diffusion-dominated regimes. We show from simulations that presence of a weak, second, high-latitude reverse cell speeds up the cycle and slightly enhances the poleward branch in butterfly diagram, whereas the presence of a second cell in depth reverses the tilt of butterfly wing to an anti-solar type. A butterfly diagram constructed from middle of convection zone yields a solar-like pattern, but this may be difficult to realize in the Sun because of magnetic buoyancy effects. Each of the above cases behaves similarly in higher and lower magnetic diffusivity regimes. However, our dynamo with a meridional circulation containing four cells in...

  3. A LEO-Based Solar-Shade System to Mitigate Global Warming

    E-Print Network [OSTI]

    Rahul Suresh; Andrew Meulenberg

    2015-04-20T23:59:59.000Z

    The development of a Low-Earth-Orbit (LEO) based solar-shade system, as part of a technically- and financially-viable multipurpose system to provide long-term solutions to global warming and the energy crisis is discussed. The proposed solar-shade and power system would be enabled by the development of a previously-proposed less-expensive, environment-friendly, space-elevator system to lift mass into space. The solar shades, even during their early deployment and growth in LEO, would provide benefits such as reduction of space-debris and depletion of the Van Allen radiation belts.The Terrestrial temperature profile has been approximated for each latitudinal zone with a one-dimensional model. A shade ring at an altitude of 2000-4000 km, consisting of thin-film mega panels totaling up to 4% of the earths surface area (to block ~1% of insolation), is proposed. The effects of such near-polar rings on the global temperature pattern has been examined using the simple model. Specific emphasis has been laid on this effect in the Polar Regions. One such proposed ring could reduce the peak summer temperature of the Polar Regions (80-90 degree latitude) by almost 3K. The tilting of the solar-shades, to reduce their cooling effect at the poles and to increase it in the near-polar regions, is recommended.

  4. Ram pressure stripping of tilted galaxies

    E-Print Network [OSTI]

    Jachym, P; Palous, J; Combes, F

    2009-01-01T23:59:59.000Z

    Ram pressure stripping of galaxies in clusters can yield gas deficient disks. Previous numerical simulations based on various approaches suggested that, except for near edge-on disk orientations, the amount of stripping depends very little on the inclination angle. Following our previous study of face-on stripping, we extend the set of parameters with the disk tilt angle and explore in detail the effects of the ram pressure on the interstellar content (ISM) of tilted galaxies that orbit in various environments of clusters, with compact or extended distributions of the intra-cluster medium (ICM). We further study how results of numerical simulations could be estimated analytically. A grid of numerical simulations with varying parameters is produced using the tree/SPH code GADGET with a modified method for calculating the ISM-ICM interaction. These SPH calculations extend the set of existing results obtained from different codes using various numerical techniques. The simulations confirm the general trend of le...

  5. Prediction of tilted capillary barrier performance

    SciTech Connect (OSTI)

    Webb, S.W.; McCord, J.T.; Dwyer, S.F.

    1997-04-01T23:59:59.000Z

    Capillary barriers, consisting of tilted fine-over-coarse layers under unsaturated conditions, have been suggested as landfill covers to divert water infiltration away from sensitive underground regions, especially for arid and semi-arid regions. The Hydrological Evaluation of Landfill Performance (HELP) computer code is an evaluation tool for landfill covers used by designers and regulators. HELP is a quasi-two-dimensional model that predicts moisture movement into and through the underground soil and waste layers. Processes modeled within HELP include precipitation, runoff, evapotranspiration, unsaturated vertical drainage, saturated lateral drainage, and leakage through liners. Unfortunately, multidimensional unsaturated flow phenomena that are necessary for evaluating tilted capillary barriers are not included in HELP. Differences between the predictions of the HELP and those from a multidimensional unsaturated flow code are presented to assess the two different approaches. Comparisons are presented for the landfill covers including capillary barrier configurations at the Alternative Landfill Cover Demonstration (ALCD) being conducted at Sandia.

  6. Stabilizing windings for tilting and shifting modes

    DOE Patents [OSTI]

    Jardin, Stephen C. (Princeton, NJ); Christensen, Uffe R. (Princeton, NJ)

    1984-01-01T23:59:59.000Z

    This invention relates to passive conducting loops for stabilizing a plasma ring against unstable tilting and/or shifting modes. To this end, for example, plasma ring in a spheromak is stabilized by a set of four figure-8 shaped loops having one pair on one side of the plasma and one pair on the other side with each pair comprising two loops whose axes are transverse to each other.

  7. The Solar Wind Energy Flux

    E-Print Network [OSTI]

    Chat, G Le; Meyer-Vernet, N

    2012-01-01T23:59:59.000Z

    The solar-wind energy flux measured near the ecliptic is known to be independent of the solar-wind speed. Using plasma data from Helios, Ulysses, and Wind covering a large range of latitudes and time, we show that the solar-wind energy flux is independent of the solar-wind speed and latitude within 10%, and that this quantity varies weakly over the solar cycle. In other words the energy flux appears as a global solar constant. We also show that the very high speed solar-wind (VSW > 700 km/s) has the same mean energy flux as the slower wind (VSW < 700 km/s), but with a different histogram. We use this result to deduce a relation between the solar-wind speed and density, which formalizes the anti-correlation between these quantities.

  8. MEASUREMENTS OF THE SUN'S HIGH-LATITUDE MERIDIONAL CIRCULATION

    SciTech Connect (OSTI)

    Rightmire-Upton, Lisa [Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899 (United States); Hathaway, David H. [NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Kosak, Katie, E-mail: lar0009@uah.edu, E-mail: david.hathaway@nasa.gov, E-mail: mkosak2011@my.fit.edu [Florida Institute of Technology, Melbourne, FL 32901 (United States)

    2012-12-10T23:59:59.000Z

    The meridional circulation at high latitudes is crucial to the buildup and reversal of the Sun's polar magnetic fields. Here, we characterize the axisymmetric flows by applying a magnetic feature cross-correlation procedure to high-resolution magnetograms obtained by the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory. We focus on Carrington rotations 2096-2107 (2010 April to 2011 March)-the overlap interval between HMI and the Michelson Doppler Imager (MDI). HMI magnetograms averaged over 720 s are first mapped into heliographic coordinates. Strips from these maps are then cross-correlated to determine the distances in latitude and longitude that the magnetic element pattern has moved, thus providing meridional flow and differential rotation velocities for each rotation of the Sun. Flow velocities were averaged for the overlap interval and compared to results obtained from MDI data. This comparison indicates that these HMI images are rotated counterclockwise by 0.{sup 0}075 with respect to the Sun's rotation axis. The profiles indicate that HMI data can be used to reliably measure these axisymmetric flow velocities to at least within 5 Degree-Sign of the poles. Unlike the noisier MDI measurements, no evidence of a meridional flow counter-cell is seen in either hemisphere with the HMI measurements: poleward flow continues all the way to the poles. Slight north-south asymmetries are observed in the meridional flow. These asymmetries should contribute to the observed asymmetries in the polar fields and the timing of their reversals.

  9. The Solar Dynamo I M.R.E.Proctor

    E-Print Network [OSTI]

    1 The Solar Dynamo I M.R.E.Proctor DAMTP, University of Cambridge Leeds, 6 September 2005 #12;2 Indicators of the Solar Cycle: Sunspots Cyclical behaviour of the Sun is shown by the evolution of sunspots magnetic field (~3000G) Axes of bipolar spots tilted by ~4 deg with respect to equator Part of the solar

  10. ULTRAVIOLET EXTINCTION AT HIGH GALACTIC LATITUDES

    SciTech Connect (OSTI)

    Peek, J. E. G.; Schiminovich, David, E-mail: jegpeek@gmail.com [Department of Astronomy, Columbia University, New York, NY (United States)

    2013-07-01T23:59:59.000Z

    In order to study the properties and effects of high Galactic latitude dust, we present an analysis of 373,303 galaxies selected from the Galaxy Evolution Explorer All-Sky Survey and Wide-field Infrared Explorer All-Sky Data Release. By examining the variation in aggregate ultraviolet colors and number density of these galaxies, we measure the extinction curve at high latitude. We additionally consider a population of spectroscopically selected galaxies from the Sloan Digital Sky Survey to measure extinction in the optical. We find that dust at high latitude is neither quantitatively nor qualitatively consistent with standard reddening laws. Extinction in the FUV and NUV is {approx}10% and {approx}35% higher than expected, with significant variation across the sky. We find that no single R{sub V} parameter fits both the optical and ultraviolet extinction at high latitude, and that while both show detectable variation across the sky, these variations are not related. We propose that the overall trends we detect likely stem from an increase in very small silicate grains in the interstellar medium.

  11. Summertime total ozone variations over middle and polar latitudes

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    Summertime total ozone variations over middle and polar latitudes 1234567 89A64BC7DEF72B4 467342 $7D425BE27B725CE9393BE647 #12;Summertime total ozone variations over middle and polar latitudes and summertime ozone over middle and polar latitudes is analyzed using zonally averaged total ozone data. Short

  12. Solar and Photovoltaic Data from the University of Oregon Solar Radiation Monitoring Laboratory (UO SRML)

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

    The UO SRML is a regional solar radiation data center whose goal is to provide sound solar resource data for planning, design, deployment, and operation of solar electric facilities in the Pacific Northwest. The laboratory has been in operation since 1975. Solar data includes solar resource maps, cumulative summary data, daily totals, monthly averages, single element profile data, parsed TMY2 data, and select multifilter radiometer data. A data plotting program and other software tools are also provided. Shade analysis information and contour plots showing the effect of tilt and orientation on annual solar electric system perfomance make up a large part of the photovoltaics data.(Specialized Interface)

  13. Analysis and synthesis of intonation using the tilt model

    E-Print Network [OSTI]

    Taylor, Paul

    This paper introduces the Tilt intonational model and describes how this model can be used to automatically analyze and synthesize intonation. In the model, intonation is represented as a linear sequence of events, which ...

  14. Geometric Model of a Narrow Tilting CAR using Robotics formalism

    E-Print Network [OSTI]

    Boyer, Edmond

    of an Electrical narrow tilting car instead of a large gasoline car should dramatically decrease traffic congestion are the terminal links. Each body Cj is connected to its antecedent Ci (i=a (j)) with a joint that represents

  15. A Neural Network Model of Visual Tilt Aftereffects

    E-Print Network [OSTI]

    1997-01-01T23:59:59.000Z

    RF-LISSOM, a self-organizing model of laterally connected orientation maps in the primary visual cortex, was used to study the psychological phenomenon known as the tilt aftereffect. The same self-organizing processes that are responsible for the long-term development of the map and its lateral connections are shown to result in tilt aftereffects over short time scales in the adult. The model allows observing large numbers of neurons and connections simultaneously, making it possible to relate higher-level phenomenato low-level events, which is difficult to do experimentally. The results give computational support for the idea that direct tilt aftereffects arise from adaptive lateral interactions between feature detectors, as has long been surmised. They also suggest that indirect effects could result from the conservation of synaptic resourcesduring this process. The model thus provides a unified computational explanation of self-organization and both direct and indirect tilt aftereff...

  16. TILT POUR TRIALS AND ANALYSIS Bob Bryant1

    E-Print Network [OSTI]

    Beckermann, Christoph

    TILT POUR TRIALS AND ANALYSIS Bob Bryant1 , Kent D. Carlson2 , Shouzhu Ou2 , Christoph Beckermann2 reduce inclusion severity, compared to standard techniques. Bryant, R., Carlson, K.D., Ou, S

  17. FORECASTING SOLAR RADIATION PRELIMINARY EVALUATION OF AN APPROACH

    E-Print Network [OSTI]

    Perez, Richard R.

    FORECASTING SOLAR RADIATION -- PRELIMINARY EVALUATION OF AN APPROACH BASED UPON THE NATIONAL, and undertake a preliminary evaluation of, a simple solar radiation forecast model using sky cover predictions forecasts is 0.05o in latitude and longitude. Solar Radiation model: The model presented in this paper

  18. An analysis on the mid-latitude scintillation and coherence frequency bandwidth using transionospheric VHF signals

    SciTech Connect (OSTI)

    Juang, Zhen [Los Alamos National Laboratory; Roussel-dupre, Robert [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    An analysis was perfonned on the mid-latitude scintillation and coherence frequency bandwidth (Fcoh) using transionospheric VHF signal data. The data include 1062 events spanning from November 1997 to June 2002. Each event records FORTE satellite received VHF signals from LAPP located at Los Alamos, New Mexico. Fcohs were derived to study scintillation characteristics on diurnal and seasonal variations, as well as changes due to solar and geomagnetic activities. Comparisons to the VHFIUHF coherence frequency bandwidth studies previously reported at equatorial and mid-latitude regions are made using a 4th power frequency dependence relationship. Furthennore, a wideband ionospheric scintillation model, WBMOD, was used to estimate Fcohs and compared with our VHF Fcoh values. Our analysis indicates mid-latitude scintillation characteristics that are not previously revealed. At the VHF bottom frequency range (3035 MHz), distinguished smaller Fcohs are found in time period from sunset to midnight, in wann season from May to August, and in low solar activity years. The effects of geomagnetic storm activity on Fcoh are characterized by a sudden transition at a Kp index of 50-60. Comparisons with median Fcohs estimated from other studies validated our VHF Fcohs for daytime while an order of magnitude larger Fcohs are found for nighttime, implying a time-dependent issue in applying the 4th order power relationship. Furthermore, comparisons with WBMOD-estimated Fcohs indicated generally matched median scintillation level estimates while differences do exist for those events undergoing high geomagnetic stonn activity which may imply underestimates of scintillation level by the WBMOD in the mid-latitude regions.

  19. Laser Guide Star Adaptive Optics without Tip-tilt

    E-Print Network [OSTI]

    R. Davies; S. Rabien; C. Lidman; M. Le Louarn; M. Kasper; N. M. Forster Schreiber; V. Roccatagliata; N. Ageorges; P. Amico; C. Dumas; F. Mannucci

    2008-01-24T23:59:59.000Z

    Adaptive optics (AO) systems allow a telescope to reach its diffraction limit at near infrared wavelengths. But to achieve this, a bright natural guide star (NGS) is needed for the wavefront sensing, severely limiting the fraction of the sky over which AO can be used. To some extent this can be overcome with a laser guide star (LGS). While the laser can be pointed anywhere in the sky, one still needs to have a natural star, albeit fainter, reasonably close to correct the image motion (tip-tilt) to which laser guide stars are insensitive. There are in fact many astronomical targets without suitable tip-tilt stars, but for which the enhanced resolution obtained with the Laser Guide Star Facility (LGSF) would still be very beneficial. This article explores what adaptive optics performance one might expect if one dispenses with the tip-tilt star, and in what situations this mode of observing might be needed.

  20. Method to fabricate a tilted logpile photonic crystal

    DOE Patents [OSTI]

    Williams, John D. (Albuquerque, NM); Sweatt, William C. (Albuquerque, NM)

    2010-10-26T23:59:59.000Z

    A method to fabricate a tilted logpile photonic crystal requires only two lithographic exposures and does not require mask repositioning between exposures. The mask and photoresist-coated substrate are spaced a fixed and constant distance apart using a spacer and the stack is clamped together. The stack is then tilted at a crystallographic symmetry angle (e.g., 45 degrees) relative to the X-ray beam and rotated about the surface normal until the mask is aligned with the X-ray beam. The stack is then rotated in plane by a small stitching angle and exposed to the X-ray beam to pattern the first half of the structure. The stack is then rotated by 180.degree. about the normal and a second exposure patterns the remaining half of the structure. The method can use commercially available DXRL scanner technology and LIGA processes to fabricate large-area, high-quality tilted logpile photonic crystals.

  1. Tilted accretion discs in cataclysmic variables: tidal instabilities and superhumps

    E-Print Network [OSTI]

    J. R. Murray; P. J. Armitage

    1998-09-10T23:59:59.000Z

    We investigate the growth of tidal instabilities in accretion discs in a binary star potential, using three dimensional numerical simulations. As expected from analytic work, the disc is prone to an eccentric instability provided that it is large enough to extend to the 3:1 resonance. The eccentric disc leads to positive superhumps in the light curve. It has been proposed that negative superhumps might arise from a tilted disc, but we find no evidence that the companion gravitational tilt instability can grow fast enough in a fluid disc to create a measurable inclination. The origin of negative superhumps in the light curves of cataclysmic variables remains a puzzle.

  2. Rotordynamic and thermal analyses of compliant flexure pivot tilting pad gas bearings

    E-Print Network [OSTI]

    Sim, Kyu-Ho

    2009-05-15T23:59:59.000Z

    Rotordynamic and thermal analyses of compliant flexure pivot tilting pad gas bearings were performed. First, compliant flexure pivot tilting pad gas bearings with pad radial compliance (CFTPBs) were introduced and designed for high-speed oil...

  3. The cost of noise reduction for departure and arrival operations of commercial tilt rotor aircraft

    E-Print Network [OSTI]

    Faulkner, Henry B.

    1976-01-01T23:59:59.000Z

    The relationship between direct operating cost (DOC) and noise annoyance due to a departure and an arrival operation was developed for commercial tilt rotor aircraft. This was accomplished by generating a series of tilt ...

  4. A new southern high-latitude index P. Ballatore1

    E-Print Network [OSTI]

    Boyer, Edmond

    -aligned currents at the poleward auroral rim both inuence geomagnetic perturbations at polar latitudes and feed a new regional geomagnetic index AES-80, dened similarly to the classical auroral electrojet AE index, using data from ve Antarctic stations located at corrected geomagnetic latitudes about 80 S. Because

  5. On the first Hochschild cohomology group of a cluster-tilted algebra

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    On the first Hochschild cohomology group of a cluster-tilted algebra Ibrahim Assem, Maria Julia Redondo and Ralf Schiffler Abstract Given a cluster-tilted algebra B, we study its first Hochschild cohomol- ogy group HH1 (B) with coefficients in the B-B-bimodule B. If C is a tilted algebra such that B

  6. Solar mechanics thermal response capabilities.

    SciTech Connect (OSTI)

    Dobranich, Dean D.

    2009-07-01T23:59:59.000Z

    In many applications, the thermal response of structures exposed to solar heat loads is of interest. Solar mechanics governing equations were developed and integrated with the Calore thermal response code via user subroutines to provide this computational simulation capability. Solar heat loads are estimated based on the latitude and day of the year. Vector algebra is used to determine the solar loading on each face of a finite element model based on its orientation relative to the sun as the earth rotates. Atmospheric attenuation is accounted for as the optical path length varies from sunrise to sunset. Both direct and diffuse components of solar flux are calculated. In addition, shadowing of structures by other structures can be accounted for. User subroutines were also developed to provide convective and radiative boundary conditions for the diurnal variations in air temperature and effective sky temperature. These temperature boundary conditions are based on available local weather data and depend on latitude and day of the year, consistent with the solar mechanics formulation. These user subroutines, coupled with the Calore three-dimensional thermal response code, provide a complete package for addressing complex thermal problems involving solar heating. The governing equations are documented in sufficient detail to facilitate implementation into other heat transfer codes. Suggestions for improvements to the approach are offered.

  7. EIS-0039: Motor Gasoline Deregulation and the Gasoline Tilt

    Broader source: Energy.gov [DOE]

    The Economic Regulatory Administration developed this EIS to evaluate the environmental impacts, including social and economic impacts, that may result from either of two proposed regulatory changes: (1) the exemption of motor gasoline from the Department of Energy's Mandatory Petroleum Price and Allocation Regulations, and (2) the adoption of the gasoline tilt, a proposed regulation that would allow refiners to recover an additional amount of their total increased costs on gasoline.

  8. Splay and tilt energy of bipolar lipid membranes

    E-Print Network [OSTI]

    Timur R. Galimzyanov; Peter I. Kuzmin; Peter Pohl; Sergey A. Akimov

    2014-12-28T23:59:59.000Z

    Archaea organisms are able to survive in extremely aggressive environment. It is thought that such resistance, at least, in part is sustained by unique properties of archaea membrane. The membrane consists of so called bolalipids, which has two polar heads joined by two hydrocarbon chains. Thus bolalipids can exist in two conformations: i) polar heads are located at different sides of bolalipid layer, so called, O-shape; ii) polar heads are located at the same side of the layer, so called, U-shape. Both polar heads and chains are chemically different from those for conventional lipids. In the present study we develop basis for theory of elasticity of bolalipid membranes. Deformations of splay, tilt and Gaussian curvature are considered. We show that energetic contributions of tilt deformation from two surfaces of bolalipid layer are additive, as well as Gaussian curvature, while splay deformations yield a cross-term. The presence of U-shapes is taken into account in terms of the layer spontaneous curvature. Estimation of tilt modulus and possible experiments allowing to measure splay moduli are described.

  9. INTERNAL-CYCLE VARIATION OF SOLAR DIFFERENTIAL ROTATION

    SciTech Connect (OSTI)

    Li, K. J.; Xie, J. L.; Shi, X. J., E-mail: lkj@ynao.ac.cn [National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011 (China)

    2013-06-01T23:59:59.000Z

    The latitudinal distributions of the yearly mean rotation rates measured by Suzuki in 1998 and 2012 and Pulkkinen and Tuominen in 1998 are utilized to investigate internal-cycle variation of solar differential rotation. The rotation rate at the solar equator seems to have decreased since cycle 10 onward. The coefficient B of solar differential rotation, which represents the latitudinal gradient of rotation, is found to be smaller in the several years after the minimum of a solar cycle than in the several years after the maximum time of the cycle, and it peaks several years after the maximum time of the solar cycle. The internal-cycle variation of the solar rotation rates looks similar in profile to that of the coefficient B. A new explanation is proposed to address such a solar-cycle-related variation of the solar rotation rates. Weak magnetic fields may more effectively reflect differentiation at low latitudes with high rotation rates than at high latitudes with low rotation rates, and strong magnetic fields may more effectively repress differentiation at relatively low latitudes than at high latitudes. The internal-cycle variation is inferred as the result of both the latitudinal migration of the surface torsional pattern and the repression of strong magnetic activity in differentiation.

  10. The Solar Wind: Probing the Heliosphere with Multiple Spacecraft John D. Richardson

    E-Print Network [OSTI]

    Richardson, John

    1 The Solar Wind: Probing the Heliosphere with Multiple Spacecraft John D. Richardson Center of the Voyager spacecraft in the outer heliosphere, Ulysses at high latitudes, and multiple solar wind monitors near Earth provides a unique opportunity to study the global structure and evolution of the solar wind

  11. Solar cycle 24: Implications for energetic particles and longterm space climate change

    E-Print Network [OSTI]

    Lockwood, Mike

    magnetic field, B [Lockwood et al., 2009a, 2009b] and a significant reduction in the solar wind speed number (R), despite the average latitude of sunspots and the inclination of the heliospheric current

  12. Tilting the Primordial Power Spectrum with Bulk Viscosity

    E-Print Network [OSTI]

    James E. Lidsey

    1993-12-16T23:59:59.000Z

    Within the context of the cold dark matter model, current observations suggest that inflationary models which generate a tilted primordial power spectrum with negligible gravitational waves provide the most promising mechanism for explaining large scale clustering. The general form of the inflationary potential which produces such a spectrum is a hyperbolic function and is interpreted physically as a bulk viscous stress contribution to the energy-momentum of a perfect baryotropic fluid. This is equivalent to expanding the equation of state as a truncated Taylor series. Particle physics models which lead to such a potential are discussed.

  13. Abengoa Solar, Inc. (Mojave Solar) | Department of Energy

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

    Solar, Inc. (Mojave Solar) Abengoa Solar, Inc. (Mojave Solar) Abengoa Solar, Inc. (Mojave Solar) Abengoa Solar, Inc. (Mojave Solar) Abengoa Solar, Inc. (Mojave Solar) Abengoa...

  14. The effects of coronal mass ejection on galactic cosmic rays in the high latitude heliosphere: Observations from Ulysses` first orbit

    SciTech Connect (OSTI)

    Bothmer, V.; Heber, B.; Kunow, H.; Mueller-Mellin, R.; Wibberenz, G. [Univ. of Kiel (Germany). Institut fuer Kernphysik; Gosling, J.T. [Los Alamos National Lab., NM (United States); Balogh, A. [Imperial College, London (United Kingdom). Blackett Lab.; Raviart, A. [CEA, Gif-sur-Yvette (France). Service d`Astrophysique; Paizis, C. [Univ. di Milano (Italy). Istituto di Fisica Cosmica CNR

    1997-10-01T23:59:59.000Z

    During its first solar orbit the Ulysses spacecraft detected several coronal mass ejections (CMEs) at high heliographic latitudes. The authors present first observations on the effects of these high latitude CMEs on galactic cosmic rays (GCRs) using measurements from the Kiel Electron Telescope (KET) which is part of the Cosmic Ray and Solar Particle Investigation (COSPIN) experiment, the Los Alamos SWOOPS (Solar Wind Observations Over the Poles of the Sun) experiment and the magnetic field experiments. They find the passage of these CMEs over the spacecraft to be associated with short term decreases of GCR intensities The relatively weak shocks in these events, driven by the CMEs` over-expansion, had no strong influence on the GCRs. The intensity minimums of GCRs occurred on closed magnetic field lines inside the CMEs themselves as indicated by bidirectional fluxes of suprathermal electrons. Short episodes of intensity increases of GCRs inside CMEs at times when the bidirectional fluxes of suprathermal electrons disappeared, can be interpreted as evidence that GCRs can easily access the interior of those CMEs in which open magnetic field lines are embedded.

  15. The effects of gantry tilt on breast dose and image noise in cardiac CT

    SciTech Connect (OSTI)

    Hoppe, Michael E.; Gandhi, Diksha; Schmidt, Taly Gilat [Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin 53233 (United States)] [Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin 53233 (United States); Stevens, Grant M. [GE Healthcare, Waukesha, Wisconsin 53188 (United States)] [GE Healthcare, Waukesha, Wisconsin 53188 (United States); Foley, W. Dennis [Department of Radiology, Medical College of Wisconsin, Froedtert Memorial Lutheran Hospital, Milwaukee, Wisconsin 53226 (United States)] [Department of Radiology, Medical College of Wisconsin, Froedtert Memorial Lutheran Hospital, Milwaukee, Wisconsin 53226 (United States)

    2013-12-15T23:59:59.000Z

    Purpose: This study investigated the effects of tilted-gantry acquisition on image noise and glandular breast dose in females during cardiac computed tomography (CT) scans. Reducing the dose to glandular breast tissue is important due to its high radiosensitivity and limited diagnostic significance in cardiac CT scans.Methods: Tilted-gantry acquisition was investigated through computer simulations and experimental measurements. Upon IRB approval, eight voxelized phantoms were constructed from previously acquired cardiac CT datasets. Monte Carlo simulations quantified the dose deposited in glandular breast tissue over a range of tilt angles. The effects of tilted-gantry acquisition on breast dose were measured on a clinical CT scanner (CT750HD, GE Healthcare) using an anthropomorphic phantom with MOSFET dosimeters in the breast regions. In both simulations and experiments, scans were performed at gantry tilt angles of 030, in 5 increments. The percent change in breast dose was calculated relative to the nontilted scan for all tilt angles. The percent change in noise standard deviation due to gantry tilt was calculated in all reconstructed simulated and experimental images.Results: Tilting the gantry reduced the breast dose in all simulated and experimental phantoms, with generally greater dose reduction at increased gantry tilts. For example, at 30 gantry tilt, the dosimeters located in the superior, middle, and inferior breast regions measured dose reductions of 74%, 61%, and 9%, respectively. The simulations estimated 0%30% total breast dose reduction across the eight phantoms and range of tilt angles. However, tilted-gantry acquisition also increased the noise standard deviation in the simulated phantoms by 2%50% due to increased pathlength through the iodine-filled heart. The experimental phantom, which did not contain iodine in the blood, demonstrated decreased breast dose and decreased noise at all gantry tilt angles.Conclusions: Tilting the gantry reduced the dose to the breast, while also increasing noise standard deviation. Overall, the noise increase outweighed the dose reduction for the eight voxelized phantoms, suggesting that tilted gantry acquisition may not be beneficial for reducing breast dose while maintaining image quality.

  16. Solar Rights

    Broader source: Energy.gov [DOE]

    In June 2010, Louisiana enacted solar rights legislation (HB 751) that prohibits certain entities from unreasonably restricting a property owner from installing a solar collector. Solar collectors...

  17. Feasibility Study of Solar Photovoltaics on Landfills in Puerto Rico (Second Study)

    SciTech Connect (OSTI)

    Salasovich, J.; Mosey, G.

    2011-08-01T23:59:59.000Z

    This report presents the results of an assessment of the technical and economic feasibility of deploying a solar photovoltaics (PV) system on landfill sites in Puerto Rico. The purpose of this report is to assess the landfills with the highest potential for possible solar PV installation and estimate cost, performance, and site impacts of three different PV options: crystalline silicon (fixed tilt), crystalline silicon (single-axis tracking), and thin film (fixed tilt). The report outlines financing options that could assist in the implementation of a system. According to the site production calculations, the most cost-effective system in terms of return on investment is the thin-film fixed-tilt technology. The report recommends financing options that could assist in the implementation of such a system. The landfills and sites considered in this report were all determined feasible areas in which to implement solar PV systems.

  18. Evolution of the contact network during tilting cycles of a granular pile under gravity

    E-Print Network [OSTI]

    Staron, Lydie

    Evolution of the contact network during tilting cycles of a granular pile under gravity S. Deboeuf of a granular pile undergoing quasi-static tilting cycles in the gravity field. The volumic deformation of granular piles during continuous load in the gravity field (Staron, Vilotte, & Radjai 2002). Far before

  19. Escape configuration lattice near the nematic-isotropic transition: Tilt analogue of blue phases

    E-Print Network [OSTI]

    Buddhapriya Chakrabarti; Yashodhan Hatwalne; N. V. Madhusudana

    2006-04-28T23:59:59.000Z

    We predict the possible existence of a new phase of liquid crystals near the nematic-isotropic ($ NI $) transition. This phase is an achiral, tilt-analogue of the blue phase and is composed of a lattice of {\\em double-tilt}, escape-configuration cylinders. We discuss the structure and the stability of this phase and provide an estimate of the lattice parameter.

  20. Self-Optimization of Antenna Tilt and Pilot Power for Dedicated Channels

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Self-Optimization of Antenna Tilt and Pilot Power for Dedicated Channels Abstract-- In Radio Access Networks (RAN), fixed configurations result in poor network efficiency. This sub- optimal performance present a framework for a self-optimizing RAN, which adapts Antenna Tilt and Pilot Power according

  1. Reliable performance Do not compromise on performance. The Latitude 3000

    E-Print Network [OSTI]

    Fiebig, Peter

    (Emerging Market), all 64 Bit Windows 7 Home Premium, Windows 7 Professional, Windows 7 Home Basic (Emerging, the Latitude 3000 Series offers a smart choice for an easy to manage environment. Dell Data Protection l Market), 32 & 64 Bit Ubuntu 12.04 Long Term Support (LTS

  2. PERSPECTIVE www.rsc.org/pps | Photochemical & Photobiological Sciences Effects of solar UV radiation on aquatic ecosystems and interactions with

    E-Print Network [OSTI]

    Columbia University

    species and aquatic ecosystems (e.g., lakes, rivers, marshes, oceans). Solar UV radiation penetrates and high to mid latitudes have aroused concern about the effects of increased solar UV-B radiation of low temperatures.7 Exposure to solar UV radiation can reduce productivity, affect reproduction

  3. Inspired Design The slim, light Latitude 6430u is simply beautiful from every

    E-Print Network [OSTI]

    Fiebig, Peter

    laptops ever. All systems are BFR/PVC- free2 , EPEAT registered3 , ENERGY STAR 5.2 qualified and offer of Latitude E-family laptops, the Latitude 6430u is amongst the most environmentally- responsible Latitude. Available with a 14.0" HD or 14.0" HD+ display4 and HDMI and VGA ports, it enables versatile usage

  4. WIND-DRIVEN NEAR INERTIAL OCEAN RESPONSE AND MIXING AT THE CRITICAL LATITUDE

    E-Print Network [OSTI]

    Zhang, Xiaoqian

    2010-07-14T23:59:59.000Z

    ? latitude. Near 30? latitude, the maximum oceanic response to sea breeze moves offshore slowly because of the near-zero group speed of Poincare waves at this latitude. The lateral energy flux convergence plus the energy input from the wind is maximum near...

  5. Proton aurora dynamics in response to the IMF and solar wind variations

    E-Print Network [OSTI]

    California at Berkeley, University of

    Proton aurora dynamics in response to the IMF and solar wind variations S.-W. Chang,1,2 S. B. Mende; accepted 24 April 2002; published 13 July 2002. [1] On May 23, 2000, proton auroras observed by IMAGE FUV wind parameters. A proton aurora brightened at high latitude poleward from the dayside oval after solar

  6. Method for removing tilt control in adaptive optics systems

    DOE Patents [OSTI]

    Salmon, Joseph Thaddeus (Livermore, CA)

    1998-01-01T23:59:59.000Z

    A new adaptive optics system and method of operation, whereby the method removes tilt control, and includes the steps of using a steering mirror to steer a wavefront in the desired direction, for aiming an impinging aberrated light beam in the direction of a deformable mirror. The deformable mirror has its surface deformed selectively by means of a plurality of actuators, and compensates, at least partially, for existing aberrations in the light beam. The light beam is split into an output beam and a sample beam, and the sample beam is sampled using a wavefront sensor. The sampled signals are converted into corresponding electrical signals for driving a controller, which, in turn, drives the deformable mirror in a feedback loop in response to the sampled signals, for compensating for aberrations in the wavefront. To this purpose, a displacement error (gradient) of the wavefront is measured, and adjusted by a modified gain matrix, which satisfies the following equation: G'=(I-X(X.sup.T X).sup.-1 X.sup.T)G(I-A)

  7. Method for removing tilt control in adaptive optics systems

    DOE Patents [OSTI]

    Salmon, J.T.

    1998-04-28T23:59:59.000Z

    A new adaptive optics system and method of operation are disclosed, whereby the method removes tilt control, and includes the steps of using a steering mirror to steer a wavefront in the desired direction, for aiming an impinging aberrated light beam in the direction of a deformable mirror. The deformable mirror has its surface deformed selectively by means of a plurality of actuators, and compensates, at least partially, for existing aberrations in the light beam. The light beam is split into an output beam and a sample beam, and the sample beam is sampled using a wavefront sensor. The sampled signals are converted into corresponding electrical signals for driving a controller, which, in turn, drives the deformable mirror in a feedback loop in response to the sampled signals, for compensating for aberrations in the wavefront. To this purpose, a displacement error (gradient) of the wavefront is measured, and adjusted by a modified gain matrix, which satisfies the following equation: G{prime} = (I{minus}X(X{sup T} X){sup {minus}1}X{sup T})G(I{minus}A). 3 figs.

  8. 'Tilting' the Universe with the Landscape Multiverse: The 'Dark' Flow

    E-Print Network [OSTI]

    L. Mersini-Houghton; R. Holman

    2008-10-30T23:59:59.000Z

    The theory for the selection of the initial state of the universe from the landscape multiverse predicts superhorizon inhomogeneities induced by nonlocal entanglement of our Hubble volume with modes and domains beyond the horizon. Here we show these naturally give rise to a bulk flow with correlation length of order horizon size. The modification to the gravitational potential has a characteristic scale $L_{1} \\simeq 10^{3} H^{-1}$, and it originates from the preinflationary remnants of the landscape. The 'tilt' in the potential induces power to the lowest CMB multipoles, with the dominant contribution being the dipole and next, the quadrupole. The induced multipoles $l \\le 2$ are aligned with an axis normal to their alignment plane being oriented along the preferred frame determined by the dipole. The preferred direction is displayed by the velocity field of the bulk flow relative to the expansion frame of the universe. The parameters are tightly constrained thus the derived modifications lead to robust predictions for testing our theory. The 'dark' flow was recently discovered by Kashlinsky et al. to be about $700 km/s$ which seems in good agreement with our predictions for the induced dipole of order $3 \\mu K$. Placed in this context, the discovery of the bulk flow by Kashlinsky et al. becomes even more interesting as it may provide a probe of the preinflationary physics and a window onto the landscape multiverse.

  9. Phonon thermal transport through tilt grain boundaries in strontium titanate

    SciTech Connect (OSTI)

    Zheng, Zexi; Chen, Xiang; Yang, Shengfeng; Xiong, Liming; Chen, Youping [Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611 (United States); Deng, Bowen; Chernatynskiy, Aleksandr [Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611 (United States)

    2014-08-21T23:59:59.000Z

    In this work, we perform nonequilibrium molecular dynamics simulations to study phonon scattering at two tilt grain boundaries (GBs) in SrTiO{sub 3}. Mode-wise energy transmission coefficients are obtained based on phonon wave-packet dynamics simulations. The Kapitza conductance is then quantified using a lattice dynamics approach. The obtained results of the Kapitza conductance of both GBs compare well with those obtained by the direct method, except for the temperature dependence. Contrary to common belief, the results of this work show that the optical modes in SrTiO{sub 3} contribute significantly to phonon thermal transport, accounting for over 50% of the Kapitza conductance. To understand the effect of the GB structural disorder on phonon transport, we compare the local phonon density of states of the atoms in the GB region with that in the single crystalline grain region. Our results show that the excess vibrational modes introduced by the structural disorder do not have a significant effect on phonon scattering at the GBs, but the absence of certain modes in the GB region appears to be responsible for phonon reflections at GBs. This work has also demonstrated phonon mode conversion and simultaneous generation of new modes. Some of the new modes have the same frequency as the initial wave packet, while some have the same wave vector but lower frequencies.

  10. Tilted CDM versus WDM in the Subgalactic Scuffle

    E-Print Network [OSTI]

    James S. Bullock

    2001-10-31T23:59:59.000Z

    Although the currently favored cold dark matter plus cosmological constant model (LCDM) has proven to be remarkably successful on large scales, on subgalactic scales it faces some potentially fatal difficulties; these include over-producing dwarf satellite galaxies and predicting excessive central densities in dark halos. Among the most natural cosmological solutions to these problems is to replace cold dark matter with a warm species (LWDM). The warm component acts to reduce the small-scale power, resulting in fewer galactic subhalos and lower halo central densities. An alternative model with a mild ``tilt'' in the inflationary power spectrum (TLCDM; n =0.9) similarly reduces the central densities of dark halos, although the substructure abundance remains relatively high. Here I argue that because dwarf galaxy formation should be suppressed in the presence of a strong ionizing background, favored LWDM models will generally under-predict the observed abundance of dwarf galaxies. The satellite count for TLCDM fairs much better, as long as the photoionization effect is taken into account. TLCDM provides a more successful alternative to LWDM on subgalactic scales with the added attraction that it relies on only a minor, natural adjustment to the standard framework of CDM.

  11. NRG Solar (California Valley Solar Ranch) | Department of Energy

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

    Solar (California Valley Solar Ranch) NRG Solar (California Valley Solar Ranch) NRG Solar (California Valley Solar Ranch) NRG Solar (California Valley Solar Ranch) Location: San...

  12. Tilt-up concrete panels : an investigation of flexural stresses and punching shear during lifting

    E-Print Network [OSTI]

    Bono, Matthew P. (Matthew Paul)

    2011-01-01T23:59:59.000Z

    Tilt-up construction is becoming more popular in the United States due to its ease of construction, reliability, and relatively low construction and maintenance costs. In its most typical form, a concrete panel is cast on ...

  13. Analysis of flexure pivot tilting pad gas bearings with different damper configurations

    E-Print Network [OSTI]

    Rimpel, Aaron Michael

    2009-05-15T23:59:59.000Z

    Hydrodynamic flexure pivot tilting pad gas bearings (FPTPGBs) can enable successful operation of oil-free microturbomachinery. This work presents the experimental and analytical study of such bearings with different damper configurations. A test rig...

  14. A Novel Computational Model for Tilting Pad Journal Bearings with Soft Pivot Stiffnesses

    E-Print Network [OSTI]

    Tao, Yujiao 1988-

    2012-12-10T23:59:59.000Z

    A novel tilting pad journal bearing model including pivot flexibility as well as temporal fluid inertia effects on the thin film fluid flow aims to accurately predict the bearing forced performance. The predictive model also accounts for the thermal...

  15. Measurements of static loading characteristics of a Flexurepivot Tilt Pad Hydrodynamic Bearing

    E-Print Network [OSTI]

    Walton, Nicholas Van Edward

    1995-01-01T23:59:59.000Z

    An experimental investigation examining the static loading characteristics of a four-pad, KMC FLEXUREPIVOT Tilt Pad Hydrodynamic Bearing is presented. Tests are conducted on the TRACE Fluid Film Bearing Element Test Rig for journal speeds ranging...

  16. Design and characterization of a planar mechanism for passive tilt-compensation

    E-Print Network [OSTI]

    Lai, Justin Yi-Shen

    2007-01-01T23:59:59.000Z

    This work investigated the design and testing of a planar mechanism for passively compensating tilt between two flat surfaces brought into close proximity. The proposed design uses flexural components which eliminate ...

  17. K'-Theory of a Cohen-Macaulay Local Ring with n-Cluster Tilting Object

    E-Print Network [OSTI]

    Navkal, Viraj

    2013-01-01T23:59:59.000Z

    Categories and K-theory Definition 4.1. An exact category isLocalizations in K-Theory Definition 8.11. Let R be a ringdefinition of n-cluster tilting comes from invariant theory.

  18. Solar Easements

    Broader source: Energy.gov [DOE]

    Virginia's solar easement law is similar to those in effect in other states. The Virginia Solar Easements Act of 1978 allows property owners to create binding solar easements for the purpose of...

  19. The cause of the weak solar cycle 24

    E-Print Network [OSTI]

    Jiang, Jie; Schuessler, Manfred

    2015-01-01T23:59:59.000Z

    The ongoing 11-year cycle of solar activity is considerably less vigorous than the three cycles before. It was preceded by a very deep activity minimum with a low polar magnetic flux, the source of the toroidal field responsible for solar magnetic activity in the subsequent cycle. Simulation of the evolution of the solar surface field shows that the weak polar fields and thus the weakness of the present cycle 24 are mainly caused by a number of bigger bipolar regions emerging at low latitudes with a `wrong' (i.e., opposite to the majority for this cycle) orientation of their magnetic polarities in the North-South direction, which impaired the growth of the polar field. These regions had a particularly strong effect since they emerged within $\\pm10^\\circ$ latitude from the solar equator.

  20. Construction techniques and costs of tilt-up concrete farm structures

    E-Print Network [OSTI]

    Winsett, Ivan Lane

    1957-01-01T23:59:59.000Z

    ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 25 2S Ths warehouse with all Panels . 'honed and ths Pilaster Focal in Place Awaiting the Costing of ths Pilastars. . . . 29 14. Detail of Corner Pilaster~ Pilaster Fora, snd Footing Used in ths Concrete Tilt-Up w'arehouse . ~ . . ~ ~. . . . . 30... ~ ~ ~ ~ ~ ~ ~ 46 26. Detail of Zaproesd Corner Pilaster, Pilaster Rora, and Footing Used in the Concrete Tilt4p Anginal Shelter ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 48 27. The Antnal shelter heady for (hating the ConcNts Posts and PDa sts...

  1. Large-scale solar cycle features of solar photospheric magnetic field

    E-Print Network [OSTI]

    W. B. Song

    2007-05-14T23:59:59.000Z

    It is well accepted that the solar cycle originates from a magnetohydrodynamics dynamo deep inside the Sun. Many dynamo models have long been proposed based on a lot of observational constraints. In this paper, using 342 NSO/Kitt Peak solar synoptic charts we study the solar cycle phases in different solar latitudinal zones to set further constraints. Our results can be summarized as follows. (1) The variability of solar polar regions' area has a correlation with total unsigned magnetic flux in advance of 5 years. (2) The high-latitude region mainly appears unipolar in the whole solar cycle and its flux peak time lags sunspot cycle for 3 years. (3) For the activity belt, it is not surprised that its phase be the same as sunspot's. (4) The flux peak time of the low-latitude region shifts forward with an average gradient of 32.2 $day/deg$. These typical characteristics may provide some hints for constructing an actual solar dynamo.

  2. NCSU Box 7401 Raleigh, NC 27695 (919) 515-3480 Toll Free 1-800-33-NC SUN SOLAR CENTER INFORMATION

    E-Print Network [OSTI]

    Solar Home #12;NorthCarolinaSolarCenter EnergyDivision,NCDepartmentofCommerce Box 7401, NCSU, Raleigh. At North Carolinas latitudes, this means that the area extending from 45o east of south to 45o westNCSU Box 7401 Raleigh, NC 27695 (919) 515-3480 Toll Free 1-800-33-NC SUN SOLAR CENTER

  3. ALSEP Thermal Performance at Off-Equator Latitudes

    E-Print Network [OSTI]

    Rathbun, Julie A.

    CONFIGURATION 33 THERMAL ANALYSIS 35 4. 1 SOLAR HEATING OF CENTRAL STATION ENCLOSURE AT LUNAR NOON 35 4.2 SOLAR HEATING OF CENTRAL STATION ENCLOSURE AT LUNAR SUNSET 35 DISCUSSION 40 5. 1 MODIFICATIONS TO CENTRAL.6 EFFECT OF OFF-EQUATOR DEPLOYMENT ON PDM PANEL 58 REFERENCES 59 #12;: : t ~ ALSEP Thermal Performance

  4. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Appendix C - Appendix 0 - Solar Radiation Glossary. ConversSolar Data a. Solar Radiation. , , . , . . , , , , . , . . .

  5. Community Shared Solar with Solarize

    Broader source: Energy.gov [DOE]

    An overview of the concept behind The Solarize Guidebook, which offers neighborhoods a plan for getting volume discounts when making group purchases of rooftop solar energy systems.

  6. A high galactic latitude survey of far ultraviolet excess objects

    SciTech Connect (OSTI)

    Bixler, J.V.

    1988-01-01T23:59:59.000Z

    Two closely related efforts in astrophysical instrumentation and observation are described with the objective of performing a high galactic latitude survey of faint objects in the far ultraviolet. The avenues of research possible with data obtained from space based ultraviolet surveys are discussed and a summary of past, present and planned instruments capable of such survey work presented. The Faust telescope, an eight degree field of view imaging instrument with peak sensitivity at 1700A, designed for survey work is described. An imaging, active readout detector and associated ground support equipment were designed, constructed, and calibrated to replace the original photographic detector. The present state of observational data relevant to determining the atmospheric parameters of subdwarf B and O stars, and their mid-Galactic plane density and scale height was reviewed. Theoretical explanations of their evolutionary status were proposed. The optical observations and spectral reductions performed on objects included in a catalog of far ultraviolet bright, high galactic latitude objects are described. These observations provide a sample of subdwarf O and B stars free of brightness and temperature selection effects. A model atmospheres analysis was performed on the subdwarf sample to determine the temperature, gravity and helium to hydrogen ratio of the individual objects. The results show a smooth distribution of objects on the gravity versus temperature diagram near the theoretical location of the extended horizontal branch.

  7. Philadelphia, Pennsylvania: Solar in Action (Brochure), Solar...

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

    Philadelphia, Pennsylvania: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Philadelphia, Pennsylvania: Solar in Action (Brochure),...

  8. High Latitude, Translucent Molecular Clouds as Probes of Local Cosmic Rays

    E-Print Network [OSTI]

    Abrahams, R D

    2015-01-01T23:59:59.000Z

    We analyze the gamma-ray emission from 9 high latitude, translucent molecular clouds taken with the Fermi Large Area Telescope (LAT) between 250 MeV and 10 GeV. Observations of gamma-rays allow us to probe the density and spectrum of cosmic rays in the solar neighborhood. The clouds studied lie within $\\sim\\!$270 pc from the Sun and are selected from the Planck all-sky CO map. Gamma-rays in this energy range mostly result from cosmic ray interactions with the interstellar medium, which is traced with three components: HI, CO, and dark gas. Every cloud is detected and shows significant, extended gamma-ray emission from molecular gas. The gamma-ray emission is dominated by the CO-emitting gas in some clouds, but by the CO-dark gas in others. The average emissivity and gamma-ray power law index from HI above 1 GeV shows no evidence of a systematic variation. The CO-to-H$_2$ conversion factor shows no variation between clouds over this small spatial range, but shows significant variations within each cloud. The a...

  9. Boston, Massachusetts: Solar in Action (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2011-10-01T23:59:59.000Z

    This brochure provides an overview of the challenges and successes of Boston, MA, a 2007 Solar America City awardee, on the path toward becoming a solar-powered community. Accomplishments, case studies, key lessons learned, and local resource information are given. The City of Boston and its Solar America Cities program, Solar Boston, are helping to debunk the myth that solar energy is only feasible in the southern latitudes. Boston has some of the highest energy prices in the country and will likely be one of the first locations where solar power achieves grid parity with conventional energy technologies. Solar Boston is facilitating the rapid development of solar energy projects and infrastructure in the short-term, and is preparing for the rapid market growth that is expected with the imminent arrival of grid parity over the long-term. Solar Boston developed the strategy for achieving Mayor Menino's goal of installing 25 MW of solar energy throughout Boston by 2015. Through Solar Boston, the city has developed a strategy for the installation of solar technology throughout Boston, including mapping feasible locations, preparing a permitting guide, and planning the citywide bulk purchase, financing, and installation of solar technology. The city has also worked with local organizations to maximize Boston's participation in state incentive programs and innovative financing initiatives. The resulting accomplishments include the following: (1) Created an online map of current local renewable energy projects with a tool to allow building owners to calculate their rooftop solar potential. The map is currently live at http://gis.cityofboston.gov/solarboston/. (2) Supported the city's Green Affordable Housing Program (GAHP), in partnership with the Department of Neighborhood Development (DND). Under GAHP, the city is installing more than 150 kW of PV on 200 units of affordable housing. DND requires that all new city-funded affordable housing be LEED silver certified and built solar-ready. (3) Defined solar's role in emergency preparedness with the Boston Mayor's Office of Emergency Preparedness. (4) Worked with local organizations to maximize Boston's participation in state incentive programs and innovative financing mechanisms. Solar Boston partners include DOE, MTC, local utilities and unions, an anonymous foundation, and a broad range of local, regional, and national clean-energy stakeholders. Solar Boston kicked off its partner program on January 10, 2008, sponsoring a workshop on 'Thinking BIG about Boston's Solar Energy Future,' to discuss how state, utility, and municipal programs can work together. Presentations were given by Solar Boston, Keyspan/National Grid, NSTAR, and MTC.

  10. Journal of Atmospheric and Solar-Terrestrial Physics 69 (2007) 191211 The magnetosphereionosphere system from the perspective of

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    Journal of Atmospheric and Solar-Terrestrial Physics 69 (2007) 191211 The magnetosphere is considered as it circulates from the mid- to high-latitude ionosphere. Energization and diversion. The impacts of an O+ -enriched plasma on solar windmagnetosphereionosphere coupling are considered at both

  11. Solar-cycle variation of the sound-speed asphericity from GONG and MDI data 1995-2000

    E-Print Network [OSTI]

    H. M. Antia; S. Basu; F. Hill; R. Howe; R. W. Komm; J. Schou

    2001-09-19T23:59:59.000Z

    We study the variation of the frequency splitting coefficients describing the solar asphericity in both GONG and MDI data, and use these data to investigate temporal sound-speed variations as a function of both depth and latitude during the period from 1995-2000 and a little beyond. The temporal variations in even splitting coefficients are found to be correlated to the corresponding component of magnetic flux at the solar surface. We confirm that the sound-speed variations associated with the surface magnetic field are superficial. Temporally averaged results show a significant excess in sound speed around 0.92 solar radii and latitude of 60 degrees.

  12. Blue-tilted Tensor Spectrum and Thermal History of the Universe

    E-Print Network [OSTI]

    Sachiko Kuroyanagi; Tomo Takahashi; Shuichiro Yokoyama

    2014-07-17T23:59:59.000Z

    We investigate constraints on the spectral index of primordial gravitational waves (GWs), paying particular attention to a blue-tilted spectrum. Such constraints can be used to test a certain class of models of the early Universe. We investigate observational bounds from LIGO+Virgo, pulsar timing and big bang nucleosynthesis, taking into account the suppression of the amplitude at high frequencies due to reheating after inflation and also late-time entropy production. Constraints on the spectral index are presented by changing values of parameters such as reheating temperatures and the amount of entropy produced at late time. We also consider constraints under the general modeling approach which can approximately describe various scenarios of the early Universe. We show that the constraints on the blue spectral tilt strongly depend on the underlying assumption and, in some cases, a highly blue-tilted spectrum can still be allowed.

  13. No evidence for the blue-tilted power spectrum of relic gravitational waves

    E-Print Network [OSTI]

    Huang, Qing-Guo

    2015-01-01T23:59:59.000Z

    In this paper, we constrain the tilt of the power spectrum of relic gravitational waves by combining the data from BICEP2/Keck array and Planck (BKP) and the Laser Interferometer Gravitational-Waves Observatory (LIGO). From the data of BKP B-modes, the constraint on the tensor tilt is $n_t=0.66^{+1.83}_{-1.44}$ at the $68%$ confidence level. By further adding the LIGO upper limit on the energy density of gravitational waves, the constraint becomes $n_t=-0.76^{+1.37}_{-0.52}$ at the $68%$ confidence level. We conclude that there is no evidence for a blue-tilted power spectrum of relic gravitational waves and either sign of the index of tensor power spectrum is compatible with the data.

  14. No evidence for the blue-tilted power spectrum of relic gravitational waves

    E-Print Network [OSTI]

    Qing-Guo Huang; Sai Wang

    2015-02-09T23:59:59.000Z

    In this paper, we constrain the tilt of the power spectrum of relic gravitational waves by combining the data from BICEP2/Keck array and Planck (BKP) and the Laser Interferometer Gravitational-Waves Observatory (LIGO). From the data of BKP B-modes, the constraint on the tensor tilt is $n_t=0.66^{+1.83}_{-1.44}$ at the $68%$ confidence level. By further adding the LIGO upper limit on the energy density of gravitational waves, the constraint becomes $n_t=-0.76^{+1.37}_{-0.52}$ at the $68%$ confidence level. We conclude that there is no evidence for a blue-tilted power spectrum of relic gravitational waves and either sign of the index of tensor power spectrum is compatible with the data.

  15. Design and initial characterization of a compact, ultra high vacuum compatible, low frequency, tilt accelerometer

    SciTech Connect (OSTI)

    OToole, A., E-mail: amandajotoole@gmail.com, E-mail: riccardo.desalvo@gmail.com [Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, 405 Hilgard Ave, Los Angeles, California 90095 (United States); Pea Arellano, F. E. [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Rodionov, A. V.; Kim, C. [California Institute of Technology, Pasadena, California 91125 (United States); Shaner, M.; Asadoor, M. [Mayfield Senior School, 500 Bellefontaine Street Pasadena, California 91105 (United States); Sobacchi, E. [Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy); Dergachev, V.; DeSalvo, R., E-mail: amandajotoole@gmail.com, E-mail: riccardo.desalvo@gmail.com [LIGO Laboratory, California Institute of Technology, MS 100-36, Pasadena, California 91125 (United States); Bhawal, A. [Arcadia High School, 180 Campus Drive, Arcadia, California 91007 (United States); Gong, P. [Department of Precision Instrument, Tsinghua University, Beijing 100084 (China); Lottarini, A. [Department of Computer Science, University of Pisa, Largo B. Pontecorvo 3, 56127 Pisa (Italy); Minenkov, Y. [Sezione INFN Tor Vergata, via della Ricerca Scientfica 1, 00133 Roma (Italy); Murphy, C. [School of Physics, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, Western Australia 6009 (Australia)

    2014-07-15T23:59:59.000Z

    A compact tilt accelerometer with high sensitivity at low frequency was designed to provide low frequency corrections for the feedback signal of the Advanced Laser Interferometer Gravitational Wave Observatory active seismic attenuation system. It has been developed using a Tungsten Carbide ceramic knife-edge hinge designed to avoid the mechanical 1/f noise believed to be intrinsic in polycrystalline metallic flexures. Design and construction details are presented; prototype data acquisition and control limitations are discussed. The instrument's characterization reported here shows that the hinge is compatible with being metal-hysteresis-free, and therefore also free of the 1/f noise generated by the dislocation Self-Organized Criticality in the metal. A tiltmeter of this kind will be effective to separate the ground tilt component from the signal of horizontal low frequency seismometers, and to correct the ill effects of microseismic tilt in advanced seismic attenuation systems.

  16. New dynamo pattern revealed by solar helical magnetic fields

    E-Print Network [OSTI]

    Zhang, Hongqi; Pevtsov, A; Gao, Yu; Xu, Haiqing; Sokoloff, D D; Kuzanyan, K

    2009-01-01T23:59:59.000Z

    Previously unobservable mirror asymmetry of the solar magnetic field -- a key ingredient of the dynamo mechanism which is believed to drive the 11-year activity cycle -- has now been measured. This was achieved through systematic monitoring of solar active regions carried out for more than 20 years at observatories in Mees, Huairou, and Mitaka. In this paper we report on detailed analysis of vector magnetic field data, obtained at Huairou Solar Observing Station in China. Electric current helicity (the product of current and magnetic field component in the same direction) was estimated from the data and a latitude-time plot of solar helicity during the last two solar cycles has been produced. We find that like sunspots helicity patterns propagate equatorwards but unlike sunspot polarity helicity in each solar hemisphere does not change sign from cycle to cycle - confirming the theory. There are, however, two significant time-latitudinal domains in each cycle when the sign does briefly invert. Our findings she...

  17. Numerical relativity simulations of thick accretion disks around tilted Kerr black holes

    E-Print Network [OSTI]

    Vassilios Mewes; Jos A. Font; Filippo Galeazzi; Pedro J. Montero; Nikolaos Stergioulas

    2015-06-12T23:59:59.000Z

    In this work we present 3D numerical relativity simulations of thick accretion disks around {\\it tilted} Kerr black holes. We investigate the evolution of three different initial disk models with a range of initial black hole spin magnitudes and tilt angles. For all the disk-to-black hole mass ratios considered ($0.044-0.16$) we observe significant black hole precession and nutation during the evolution. This indicates that for such mass ratios, neglecting the self-gravity of the disks by evolving them in a fixed background black hole spacetime is not justified. We find that the two more massive models are unstable against the Papaloizou-Pringle (PP) instability and that those PP-unstable models remain unstable for all initial spins and tilt angles considered, showing that the development of the instability is a very robust feature of such PP-unstable disks. The tilt between the black hole spin and the disk is strongly modulated during the growth of the PP instability, causing a partial global realignment of black hole spin and disk angular momentum in the most massive model with constant specific angular momentum $l$. For the model with non-constant $l$-profile we observe a long-lived $m=1$ non-axisymmetric structure which shows strong oscillations of the tilt angle in the inner regions of the disk. We attribute this effect to the development of Kozai-Lidov oscillations. Our simulations also confirm earlier findings that the development of the PP instability causes the long-term emission of large amplitude gravitational waves, predominantly for the $l=m=2$ multipole mode. The imprint of the BH precession on the gravitational waves from tilted BH-torus systems remains an interesting open issue that would require significantly longer simulations than those presented in this work.

  18. Solar cycle variations of large scale flows in the Sun

    E-Print Network [OSTI]

    Sarbani Basu; H. M. Antia

    2000-01-17T23:59:59.000Z

    Using data from the Michelson Doppler Imager (MDI) instrument on board the Solar and Heliospheric Observatory (SOHO), we study the large-scale velocity fields in the outer part of the solar convection zone using the ring diagram technique. We use observations from four different times to study possible temporal variations in flow velocity. We find definite changes in both the zonal and meridional components of the flows. The amplitude of the zonal flow appears to increase with solar activity and the flow pattern also shifts towards lower latitude with time.

  19. Regional Per Capita Solar Electric Footprint for the United States

    SciTech Connect (OSTI)

    Denholm, P.; Margolis, R.

    2007-12-01T23:59:59.000Z

    In this report, we quantify the state-by-state per-capita 'solar electric footprint' for the United States. We use state-level data on population, electricity consumption, economic activity and solar insolation, along with solar photovoltaic (PV) array packing density data to develop a range of estimates of the solar electric footprint. We find that the solar electric footprint, defined as the land area required to supply all end-use electricity from solar photovoltaics, is about 181 m2 per person in the United States. Two key factors that influence the magnitude of the state-level solar electric footprint include how industrial energy is allocated (based on location of use vs. where goods are consumed) and the assumed distribution of PV configurations (flat rooftop vs. fixed tilt vs. tracking). The solar electric footprint is about 0.6% of the total land area of the United States with state-level estimates ranging from less than 0.1% for Wyoming to about 9% for New Jersey. We also compare the solar electric footprint to a number of other land uses. For example, we find that the solar electric footprint is equal to less than 2% of the land dedicated to cropland and grazing in the United States.

  20. Solar Rights

    Broader source: Energy.gov [DOE]

    Cities and counties in North Carolina generally may not adopt ordinances prohibiting the installation of "a solar collector that gathers solar radiation as a substitute for traditional energy for...

  1. CHARACTERISTICS OF SOLAR MERIDIONAL FLOWS DURING SOLAR CYCLE 23

    SciTech Connect (OSTI)

    Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Antia, H. M., E-mail: sarbani.basu@yale.ed, E-mail: antia@tifr.res.i [Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India)

    2010-07-01T23:59:59.000Z

    We have analyzed available full-disk data from the Michelson Doppler Imager on board SOHO using the 'ring diagram' technique to determine the behavior of solar meridional flows over solar cycle 23 in the outer 2% of the solar radius. We find that the dominant component of meridional flows during solar maximum was much lower than that during the minima at the beginning of cycles 23 and 24. There were differences in the flow velocities even between the two minima. The meridional flows show a migrating pattern with higher-velocity flows migrating toward the equator as activity increases. Additionally, we find that the migrating pattern of the meridional flow matches those of sunspot butterfly diagram and the zonal flows in the shallow layers. A high-latitude band in meridional flow appears around 2004, well before the current activity minimum. A Legendre polynomial decomposition of the meridional flows shows that the latitudinal pattern of the flow was also different during the maximum as compared to that during the two minima. The different components of the flow have different time dependences, and the dependence is different at different depths.

  2. The Structure of the Homunculus: I. Shape and Latitude Dependence from H2 and [Fe II] Velocity Maps of Eta Carinae

    E-Print Network [OSTI]

    Nathan Smith

    2006-02-21T23:59:59.000Z

    High resolution long-slit spectra obtained with the Phoenix spectrograph on Gemini South provide our most accurate probe of the three dimensional structure of the Homunculus around eta Car. The new near-infrared spectra dramatically confirm the double-shell structure inferred previously from thermal dust emission, resolving the nebula into a very thin outer shell seen in H2 21218, and a warmer, thicker inner layer seen in [Fe II] 16435. The thin H2 skin hints that the most important mass loss during the 19th century eruption had a very short duration of less than 5 yr. H2 emission traces the majority of the mass in the nebula, and has an average density of order 10^6.5 cm-3. This emission, in turn, yields our first definitive picture of the exact shape of the nebula, plus a distance of 2350pm50 pc and an inclination angle of 41deg (the polar axis is tilted 49deg from the plane of the sky). The distribution of the H2 emission provides the first measure of the latitude dependence of the speed, mass loss, and kinetic energy associated with eta Car's 19th century explosion. Almost 75 percent of the total mass and more than 90 percent of the kinetic energy in the ejecta were released at high latitudes. This rules out a model for the bipolar shape wherein an otherwise spherical explosion was pinched at the waist by a circumstellar torus. Also, the ejecta could not have been deflected toward polar trajectories by a companion star, since the kinetic energy of the polar ejecta is greater than the binding energy of the putative binary system. Instead, most of the mass appears to have been directed poleward by the explosion itself. [abridged

  3. Volume 177, number 2 CHEMICAL PHYSICS LETTERS 15 February 1991 Cu titration of tilted CO on a MO( 110) surface

    E-Print Network [OSTI]

    Goodman, Wayne

    to the surface normal. Upon subsequent deposition of = 0.9 ML Cu at 95 Kfollowed by heating, infrared, in a weakening of the C-O bond [ l-41. The tilted CO can either dissociate into atomic C and 0 upon heating to z) surface. In this Letter, we present the results of studies on tilted CO on MO( 110) using infrared

  4. PS-wave moveout inversion for tilted TI media: A physical-modeling study Pawan Dewangan1

    E-Print Network [OSTI]

    PS-wave moveout inversion for tilted TI media: A physical-modeling study Pawan Dewangan1 , Ilya Tsvankin2 , Mike Batzle3 , Kasper van Wijk4 , and Matthew Haney5 ABSTRACT Mode-converted PS-waves can- and PS- waves can be inverted for the parameters of a horizontal TI layer with a tilted symmetry axis

  5. Tilted Micro Air Jet for Flow Control Julien Malapert*, Rda Yahiaoui, Rabah Zeggari and Jean-Franois Manceau

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Tilted Micro Air Jet for Flow Control Julien Malapert*, Réda Yahiaoui°, Rabah Zeggari and Jean: In this paper, we present an interesting method to microfabricate a tilted micro air jet generator. We used a double side etching. For aircraft and cars, micro air jets will take an important place for fluid control

  6. First Flight Tests for a Quadrotor UAV with Tilting Propellers Markus Ryll, Heinrich H. Bulthoff, and Paolo Robuffo Giordano

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ]. For these latter platforms, only the Cartesian position and yaw angle of their body frame w.r.t. an inertial frame directions. As quadrotor UAVs are being more and more exploited as autonomous flying service robots [3], [4: ducted-fan designs [5], tilt-wing mechanisms [6], [7], or tilt-rotor actuations [8], [9]. Along similar

  7. Properties of localized, high latitude, dayside aurora H. U. Frey,1

    E-Print Network [OSTI]

    California at Berkeley, University of

    Properties of localized, high latitude, dayside aurora H. U. Frey,1 T. J. Immel,1 G. Lu,2 J different type of high latitude aurora, which does not show any signature of precipitating protons. It also causes the aurora. We interpret this aurora as the optical signature of electron precipitation

  8. Very low latitude (L = 1.08) whistlers Rajesh Singh,1

    E-Print Network [OSTI]

    currents of whistler-producing lightning, which demonstrate a cutoff at 30 kA. Citation: Singh, R., M. B is much larger in a duct propagation than in non-ducted. At low latitudes (geomagnetic latitude the transmission cone. On the other hand, earlier studies utilized direction finding measurements to investigate

  9. Seasonal persistence of northern low-and middle-latitude anomalies of ozone and

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    Seasonal persistence of northern low- and middle-latitude anomalies of ozone and other trace gases #12;Seasonal persistence of northern low- and middle-latitude anomalies of ozone and other trace gases 10 July 2008; accepted 23 July 2008; published 11 November 2008. [1] Analysis of observed ozone

  10. Beta diversity and latitude in North American mammals: testing the hypothesis of covariation

    E-Print Network [OSTI]

    Nacional Autónoma de México, Universidad

    Beta diversity and latitude in North American mammals: testing the hypothesis of covariation Pilar Rodri´guez and He´ctor T. Arita Rodri´guez, P. and Arita, H. T. 2004. Beta diversity and latitude of the pattern remain insufficiently explored, including the effect of scales and the role of beta diversity

  11. Extended scaling factors for in situ cosmogenic nuclides: New measurements at low latitude

    E-Print Network [OSTI]

    Zreda, Marek

    Extended scaling factors for in situ cosmogenic nuclides: New measurements at low latitude Darin by the intensity of energetic cosmic-ray nucleons, which changes rapidly with elevation. An incomplete knowledge, and that there has been an incomplete mapping of nucleon fluxes at high RC (low geomagnetic latitude). We report new

  12. METR 4133, Atmospheric Dynamics III: Mid-Latitude Synoptic-Scale Dynamics

    E-Print Network [OSTI]

    Droegemeier, Kelvin K.

    METR 4133, Atmospheric Dynamics III: Mid-Latitude Synoptic- Scale Dynamics Fall 2012 Instructor Dr and Thurs, 11:30 am 12:45 pm Required Texts Bluestein, H., 1992: Synoptic-Dynamic Meteorology in Mid-Latitudes, Volume I: Principles of Kinematics and Dynamics. Oxford Univ. Press, 431pp. Bluestein, H., 1993: Synoptic-Dynamic

  13. The Solar Corona During the Total Solar Eclipse on March 29, 2006: Shape and Structure

    E-Print Network [OSTI]

    I. V. Sadovenko; M. I. Pishkalo

    Abstract. Shape and structure of the solar corona during the total solar eclipse on March 29, 2006 were studied. Solar corona on March 29, 2006 was classified as the intermediate pre-minimal type corona. The solar corona flattening at different distances was determined. The flattening index ? = a+b was found to be 0.176. Main coronal structural features were found to be northern and southern polar ray systems over polar coronal holes and six streamers of different brightness, located in middle and low heliographic latitudes. Detailed coronal structure was analyzed. Synoptic chart of chromospheric features around the date of the eclipse was drawn. It was found that all of coronal structural features had their counterparts on photosphere-chromosphere level at the limb or near it.

  14. Friction in (im-)miscible polymer brush systems and the role of transverse polymer-tilting

    E-Print Network [OSTI]

    Mueser, Martin

    Friction in (im-)miscible polymer brush systems and the role of transverse polymer-tilting Sissi de preferred solvent, leading to low friction and low wear rates. Here, we demonstrate, using molecular systems also show smaller friction than miscible systems, although the friction reduction is less than

  15. TILTED LAYER-BASED MODELING FOR ENHANCED LIGHT-FIELD PROCESSING AND IMAGE BASED RENDERING

    E-Print Network [OSTI]

    Dragotti, Pier Luigi

    TILTED LAYER-BASED MODELING FOR ENHANCED LIGHT-FIELD PROCESSING AND IMAGE BASED RENDERING James, UK {j.pearson09, marcovs, mike.brookes, p.dragotti}@imperial.ac.uk ABSTRACT Image based rendering- torealistic results. However for successful rendering, geometric pri- ors about the structure of the scene

  16. Atomistic simulations of structures and mechanical properties of polycrystalline diamond: Symmetrical S001< tilt grain boundaries

    E-Print Network [OSTI]

    Brenner, Donald W.

    Atomistic simulations of structures and mechanical properties of polycrystalline diamond for diamond to deposit as a polycrystalline film with a high density of grain boundaries and related defects structures and energies of symmetrical 001 tilt grain boundaries GB's in diamond have been calculated over

  17. Tilt Aftereffects in a Self-Organizing Model of the Primary Visual Cortex

    E-Print Network [OSTI]

    2000-01-01T23:59:59.000Z

    RF-LISSOM, a self-organizing model of laterally connected orientation maps in the primary visual cortex, was used to study the psychological phenomenon known as the tilt aftereffect. The same self-organizing processes that are responsible for the long-term development of the map are shown to result in tilt aftereffects over short time scales in the adult. The model permits simultaneous observation of large numbers of neurons and connections, making it possible to relate high-level phenomena to low-level events, which is difficult to do experimentally. The results give detailed computational support for the long-standing conjecture that the direct tilt aftereffect arises from adaptive lateral interactions between feature detectors. They also make a new prediction that the indirect effect results from the normalization of synaptic efficacies during this process. The model thus provides a unified computational explanation of self-organization and both the direct and indirect tilt aftereffect in the primary visual cortex.

  18. Evidence of a tilted columnar structure for mesomorphic phases of benzene-hexa-n-alkanoates

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    1285 Evidence of a tilted columnar structure for mesomorphic phases of benzene-hexa-n-alkanoates F. 2014 Optical observations on the mesomorphs of benzene-hexa-n-alkanoates, and their admixtures with benzene, show that the planes of these discotic molecules are not perpendicular to the columns in which

  19. SOLAR MERIDIONAL CIRCULATION FROM DOPPLER SHIFTS OF THE Fe I LINE AT 5250 A AS MEASURED BY THE 150-FOOT SOLAR TOWER TELESCOPE AT THE MT. WILSON OBSERVATORY

    SciTech Connect (OSTI)

    Ulrich, Roger K. [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1562 (United States)

    2010-12-10T23:59:59.000Z

    Doppler shifts of the Fe I spectral line at 5250 A from the full solar disk obtained over the period 1986 to 2009 are analyzed to determine the circulation velocity of the solar surface along meridional planes. Simultaneous measurements of the Zeeman splitting of this line are used to obtain measurements of the solar magnetic field that are used to select low field points and impose corrections for the magnetically induced Doppler shift. The data utilized is from a new reduction that preserves the full spatial resolution of the original observations so that the circulation flow can be followed to latitudes of 80{sup 0} N/S. The deduced meridional flow is shown to differ from the circulation velocities derived from magnetic pattern movements. A reversed circulation pattern is seen in polar regions for three successive solar minima. A surge in circulation velocity at low latitudes is seen during the rising phases of cycles 22 and 23.

  20. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    and forecasting of solar radiation data: a review,forecasting of solar- radiation data, Solar Energy, vol.sequences of global solar radiation data for isolated sites:

  1. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Weather Data . . . . . , . , . . . . . . . . . .Solar DataB. l'he Solar Constant. . . . . . C. Solar Time and Standard

  2. Sandia National Laboratories: solar

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

    Test Facility NSTTF Nuclear Energy photovoltaic Photovoltaics PV Renewable Energy solar Solar Energy solar power Solar Research Solid-State Lighting SSLS Connect Contact Us RSS...

  3. Sandia National Laboratories: solar

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

    NSTTF Nuclear Energy photovoltaic Photovoltaics PV Renewable Energy solar Solar Energy solar power Solar Research Solid-State Lighting SSLS Connect Contact Us RSS Google+...

  4. Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain

    SciTech Connect (OSTI)

    Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

    2010-05-14T23:59:59.000Z

    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 U.S. latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {le} 5:12 [23{sup o}]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} 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%. We define clear-sky air mass one global horizontal ('AM1GH') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer.

  5. Measuring solar reflectance - Part I: Defining a metric that accurately predicts solar heat gain

    SciTech Connect (OSTI)

    Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul [Heat Island Group, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States)

    2010-09-15T23:59:59.000Z

    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 R{sub E891BN} 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{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} 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%. We define clear sky air mass one global horizontal (''AM1GH'') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer. (author)

  6. Solar Car

    SciTech Connect (OSTI)

    None

    2010-01-01T23:59:59.000Z

    Des Moines Central Academy Middle School students compete in the Solar Car Challenge at the National Science Bowl, May 2 in Washington D.C.

  7. Solar Rights

    Broader source: Energy.gov [DOE]

    Maine law requires that any municipal ordinance, bylaw, or regulation adopted after September 30, 2009 regulating solar energy devices on residential property follow certain requirements. The rules...

  8. Diffuse Galactic Light in the Field of the Translucent High Galactic Latitude Cloud MBM32

    E-Print Network [OSTI]

    Ienaka, N; Matsuoka, Y; Sameshima, H; Oyabu, S; Tsujimoto, T; Peterson, B A

    2013-01-01T23:59:59.000Z

    We have conducted B, g, V, and R-band imaging in a 45x40 arcmin^2 field containing part of the high Galactic latitude translucent cloud MBM32, and correlated the intensity of diffuse optical light S_\

  9. Alfven field line resonances at low latitudes (L = 1.5)

    SciTech Connect (OSTI)

    Green, A.W.; Worthington, E.W. [Geological Survey, Denver, CO (United States); Baransky, L.N.; Fedorov, E.N.; Kurneva, N.A.; Pilipenko, V.A.; Shvetzov, D.N. [Institute of the Physics of the Earth, Moscow (Russian Federation); Bektemirov, A.A.; Philipov, G.V. [Institute of Seismology of Kyrgyzian Academy of Science, Bishkek (Kyrgyzstan)

    1993-09-01T23:59:59.000Z

    Here the authors present preliminary analysis of measurements of the spatial structure of ULF waves in the low latitude ionosphere. They used a gradient analysis method to demonstrate that Pc3 Alfven field line resonances do exist at L=1.5. The authors recorded resonance frequencies, resonance widths, and radial gradients of Alfven frequencies. The widths are found to increase with decreasing latitude, which is attributed to increased ionospheric damping.

  10. Constraints on planet X/Nemesis from Solar System's inner dynamics

    E-Print Network [OSTI]

    Lorenzo Iorio

    2009-07-29T23:59:59.000Z

    We put full 3D constraints on a putative planet X by using the dynamics of the inner planets of the solar system. In particular, we compute the mimium distance of X as a function of its heliocentric latitude and longitude for different values of its mass.

  11. ELEG620: Solar Electric Systems University of Delaware Spring 2008 1 University of Delaware

    E-Print Network [OSTI]

    Honsberg, Christiana

    Department of Electrical and Computer Engineering ELEG620: Solar Electric Systems Photovoltaic System Design-alone photovoltaic system. Working in groups, you will: · Decide on a load and design goal for your system; · Write system is to determine the type and size of the system. You are given substantial latitude in choosing

  12. An experimental investigation of a tilt rotor aircraft wake in ground effect

    E-Print Network [OSTI]

    Frey, Michael Louis

    1982-01-01T23:59:59.000Z

    were taken at several disk loadings and various model to ground plane distances. The data collected was used to evaluate the horizontal wake component's effect on people by re- lating the experimental velocity profiles to an equivalent uniform... Flow Measurement Equipment. Wake Velocity Versus Distance from Tilt Rotor Wake Velocity Versus Disk Loading Tuft Flow Visualization ? H=3D, 3, 000 RPM Tuft Flow Visualization ? H=2D, 9, 000 RPM Flow Direction Measurement Results ? H=1D 14 20 22...

  13. Measurement of rotordynamic coefficients for a high-speed flexure pivot tilting-pad bearing(load between pad) configuration

    E-Print Network [OSTI]

    Al-Ghasem, Adnan Mahmoud

    2005-08-29T23:59:59.000Z

    This thesis presents the dynamic and static forced performance of a flexure-pivot tilting-pad bearing load between pad (LBP) configuration for different rotor speeds and bearing unit loadings. The bearing has the following design parameters: 4 pads...

  14. Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing

    E-Print Network [OSTI]

    Wilkes, Jason Christopher

    2012-02-14T23:59:59.000Z

    Many researchers have compared predicted stiffness and damping coefficients for tilting-pad journal bearings (TPJBs) to measurements. Most have found that direct damping is consistently overpredicted. The thrust of this research is to explain...

  15. Effects of head-up tilt on mean arterial pressure, heart rate, and regional cardiac output distribution in aging rats

    E-Print Network [OSTI]

    Ramsey, Michael Wiechmann

    2006-04-12T23:59:59.000Z

    Many senescent individuals demonstrate an inability to regulate mean arterial pressure (MAP) in response to standing or head-up tilt; however, whether this aging effect is the result of depressed cardiac function or an ...

  16. Red and blue tilted tensor spectrum from Gibbons-Hawking temperature

    E-Print Network [OSTI]

    Subhendra Mohanty; Akhilesh Nautiyal

    2015-01-09T23:59:59.000Z

    The scale invariant scalar and tensor perturbations, which are predicted from inflation, are eigenmodes in the conformal coordinates. The 'out' observer in the de Sitter space observes a thermal spectrum with a Gibbons-Hawking temperature $H/2\\pi$ of these 'Bunch-Davies' particles. The tensor power spectrum observed in experiments can have an imprint of the Gibbons-Hawking thermal distribution due to the mode mixing between 'in' state conformal coordinates and the coordinate frame of the observer. We find that the the Bunch-Davies modes appear as thermal modes to the asymptotic Minkowski observer in the future and the power spectrum of the gravitational waves is blue-tilted with a spectral index $n_T \\sim 1$ even in the standard slow-roll inflation. On the other hand if the coordinate frame of the observer is taken to be static coordinates, the tensor spectrum is red-tilted with $n_T\\sim -1$. A likelihood analysis shows and find the best fit values of the slow-roll parameters for both cases. We find that the blue-tilted tensor gives a better fit and reconciles the PLANCK upper bound on the tensor-to-scalar ratio, $r <0.11$ with BICEP2 measurement of $r=0.2$. This supports the idea of particle production due to the mode mixing between the initial Bunch-Davies vacuum modes and the asymptotic Minkowski vacuum of the post-inflation universe.

  17. Hybrid monitor for both beam position and tilt of pulsed high-current beams

    SciTech Connect (OSTI)

    Pang, J., E-mail: jpang-caep@foxmail.com; He, X.; Ma, C.; Zhao, L.; Li, Q.; Dai, Z. [Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, P.O. Box 919-106, Mianyang 621900 (China)

    2014-09-15T23:59:59.000Z

    A Hybrid beam monitor, integrated with both azimuthal and axial B-dot probes, was designed for simultaneous measurement of both beam position and beam angle for pulsed high-current beams at the same location in beam pipe. The output signals of axial B-dot probes were found to be mixed with signals caused by transverse position deviation. In order to eliminate the unwanted signals, an elimination method was developed and its feasibility tested on a 50-? coaxial line test stand. By this method, a waveform, shape-like to that of input current and proportional to the tilt angle, was simulated and processed by following integration step to achieve the tilt angle. The tests showed that the measurement error of displacement and tilt angle less than 0.3 mm and 1.5 mrad, respectively. The latter error could be reduced with improved probes by reducing the inductance of the axial B-dot probe, but the improvement reached a limit due to some unknown systemic mechanism.

  18. An Analysis of Source Tilting and Sub-cell Opacity Sampling for IMC

    SciTech Connect (OSTI)

    Wollaeger, Ryan T. [Los Alamos National Laboratory; Urbatsch, Todd J. [Los Alamos National Laboratory; Wollaber, Allan B. [Los Alamos National Laboratory; Densmore, Jeffery D. [Los Alamos National Laboratory

    2012-08-02T23:59:59.000Z

    Implicit Monte Carlo (IMC) is a stochastic method for solving the radiative transfer equations for multiphysics application with the material in local thermodynamic equilibrium. The IMC method employs a fictitious scattering term that is computed from an implicit discretization of the material temperature equation. Unfortunately, the original histogram representation of the temperature and opacity with respect to the spatial domain leads to nonphysically fast propagation of radiation waves through optically thick material. In the past, heuristic source tilting schemes have been used to mitigate the numerical teleportation error of the radiation particles in IMC that cause this overly rapid radiation wave propagation. While improving the material temperature profile throughout the time duration, these tilting schemes alone do not generally alleviate the teleportation error to suitable levels. Another means of potentially reducing teleportation error in IMC is implementing continuous sub-cell opacities based on sub-cell temperature profiles. We present here an analysis of source tilting and continuous sub-cell opacity sampling applied to various discretizations of the temperature equation. Through this analysis, we demonstrate that applying both heuristics does not necessarily yield more accurate results if the discretization of the material equation is inconsistent with the Monte Carlo sub-cell transport.

  19. Compressive turbulent cascade and heating in the solar wind

    SciTech Connect (OSTI)

    Marino, R. [Dipartimento di Fisica, Universita della Calabria, Ponte Bucci 31C, I-87036 Rende (Italy); University of Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France); Sorriso-Valvo, L. [Liquid Crystal Laboratory, INFM/CNR, Ponte Bucci 33B, I-87036 Rende (Italy); Carbone, V. [Dipartimento di Fisica, Universita della Calabria, Ponte Bucci 31C, I-87036 Rende (Italy); Noullez, A. [University of Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France); Bruno, R. [INAF-Istituto Fisica Spazio Interplanetario, Rome (Italy)

    2010-03-25T23:59:59.000Z

    A turbulent energy cascade has been recently identified in high-latitude solar wind data samples by using a Yaglom-like relation. However, analogous scaling law, suitably modified to take into account compressible fluctuations, has been observed in a much more extended fraction of the same data set recorded by the Ulysses spacecraft. Thus, it seems that large scale density fluctuations, despite their low amplitude, play a major role in the basic scaling properties of turbulence. The compressive turbulent cascade, moreover, seems to be able to supply the energy needed to account for the local heating of the non-adiabatic solar wind.

  20. Improved Methodology to Measure Normal Incident Solar Radiation with a Multi-Pyranometer Array

    E-Print Network [OSTI]

    Baltazar, J.C.; Sun, Y.; Haberl, J.

    2013-01-01T23:59:59.000Z

    at different tilt and azimuth angles, and that can be used to estimate the normal incident component without the tracking devices that require more detailed installation and maintenance.. The arrays sensors are of the photovoltaic type, which require both... for photovoltaic-type solar sensor, and using similar approach, a number of solutions for switching schemes was presented by Miloslaw [7]. However, those methods still cannot provide high accuracy for the whole estimation period and the methods still present...

  1. Solar Rights

    Broader source: Energy.gov [DOE]

    According to state law, effective July 1, 2008, community associations in Virginia generally may not prohibit a homeowner from installing or using a solar energy collection device on their property...

  2. Tilting at Modern: Elizabeth Gordon's "The Threat to the Next America"

    E-Print Network [OSTI]

    Corbett, Kathleen LaMoine

    2010-01-01T23:59:59.000Z

    an example of a house that used passive solar heating, andbest houses of the future,? primary among them passive solarHouse I Would Like to Live In After the War,? 31. encouraged passive

  3. Solar heating and hot water system installed at St. Louis, Missouri. Final report

    SciTech Connect (OSTI)

    Not Available

    1980-04-01T23:59:59.000Z

    Information is provided on the solar heating and hot water system installed at the William Tao and Associates, Inc., office building in St. Louis, Missouri. The information consists of description, photos, maintenance and construction problems, final drawing, system requirements and manufacturer's component data. The solar system was designed to provide 50% of the hot water requirements and 45% of the space heating needs for a 900 square foot office space and drafting room. The solar facility has 252 square foot of glass tube concentrator collectors and a 1000 gallon steel storage tank buried below a concrete slab floor. Freeze protection is provided by a propylene glycol/water mixture in the collector loop. The collectors are roof mounted on a variable tilt array which is adjusted seasonally and is connected to the solar thermal storage tank by a tube-in-shell heat exchanger. Incoming city water is preheated through the solar energy thermal storage tank.

  4. Solar Thermal Powered Evaporators

    E-Print Network [OSTI]

    Moe, Christian Robert

    2015-01-01T23:59:59.000Z

    and C. Y. Zhao, "A review of solar collectors and thermalenergy storage in solar thermal applications," Appliedon photovoltaic/thermal hybrid solar technology," Applied

  5. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    Figure 6.3: Birds-eye view of solar array deployment siteBirds-eye 7. Birds-eye view of of solar solar array array

  6. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    2008, uses concentrated solar power to split water. Figurethe main reason the potential for solar power is boundless.a clean energy source, solar power is inexhaustible, fairly

  7. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    for Daily Solar Radiation Data. Proceedings of the 1977from total horizontal radiation data, they both suffer froma. SOLAR RADIATION Solar radiation data provide a measure of

  8. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    2.1.2 European Solar Radiation Atlas (ESRA)for supplementing solar radiation network data, FinalEstimating incident solar radiation at the surface from geo-

  9. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    2.1.2 European Solar Radiation Atlas (ESRA)2.4 Evaluation of Solar Forecasting . . . . . . . . .2.4.1 Solar Variability . . . . . . . . . . . . .

  10. Residential Solar Valuation Rates

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

    Residential Solar Valuation Rates Karl R. Rbago Rbago Energy LLC 1 The Ideal Residential Solar Tariff Fair to the utility and non-solar customers Fair compensation to...

  11. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    Solar Energy Laboratory 1303 Engineering Research Building UniversitySolar Energy Laboratory 1303 Engineering Research laboratory UniversitySolar Energy Group, Energy and Lawrence Berkeley Laboratory University

  12. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01T23:59:59.000Z

    Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensionalinorganic nanocrystal solar cells 5.1 Introduction In recentoperation of organic based solar cells and distinguish them

  13. Sandia National Laboratories: solar

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

    solar Molten Salt Test Loop Commissioning On October 10, 2012, in Concentrating Solar Power, EC, Energy, News, News & Events, Renewable Energy, Solar The Molten Salt Test Loop...

  14. Climatology of Mid-latitude Ionospheric Disturbances from the Very Large Array Low-frequency Sky Survey

    E-Print Network [OSTI]

    Helmboldt, J F; Cotton, W D

    2012-01-01T23:59:59.000Z

    The results of a climatological study of ionospheric disturbances derived from observations of cosmic sources from the Very Large Array (VLA) Low-frequency Sky Survey (VLSS) are presented. We have used the ionospheric corrections applied to the 74 MHz interferometric data within the VLSS imaging process to obtain fluctuation spectra for the total electron content (TEC) gradient on spatial scales from a few to hundreds of kilometers and temporal scales from less than one minute to nearly an hour. The observations sample nearly all times of day and all seasons. They also span latitudes and longitudes from 28 deg. N to 40 deg. N and 95 deg. W to 114 deg. W, respectively. We have binned and averaged the fluctuation spectra according to time of day, season, and geomagnetic (Kp index) and solar (F10.7) activity. These spectra provide a detailed, multi-scale account of seasonal and intraday variations in ionospheric activity with wavelike structures detected at wavelengths between about 35 and 250 km. In some cases,...

  15. PASSOLAR: a program library for estimating the annual performance of passive solar buildings with programmable calculators

    SciTech Connect (OSTI)

    Graeff, R.W.

    1980-01-01T23:59:59.000Z

    The Passive Solar Design Handbook, Volume 2, by J. Douglas Balcomb et al. describes in detail a method by which the performance of passive solar buildings can be estimated with the help of handheld calculators and a great number of tables and charts. PASSOLAR consists of a number of programs in the form of magnetic cards, which contain this method together with all the charts and tables. This reduces the necessary time to estimate the annual performance of direct gain, Trombe wall or water wall systems from hours to minutes. PASSOLAR allows the use of additional algorithms for the calculating of the insolation on the tilted surface and of shading effects.

  16. Ferroelectric and octahedral tilt twin disorder and the lead-free piezoelectric, sodium potassium niobate system

    SciTech Connect (OSTI)

    Schiemer, Jason [Research School of Chemistry, The Australian National University, Canberra, ACT 0200 (Australia)] [Research School of Chemistry, The Australian National University, Canberra, ACT 0200 (Australia); Withers, Ray L., E-mail: withers@rsc.anu.edu.au [Research School of Chemistry, The Australian National University, Canberra, ACT 0200 (Australia); Liu, Yun; Yi, Zhiguo [Research School of Chemistry, The Australian National University, Canberra, ACT 0200 (Australia)] [Research School of Chemistry, The Australian National University, Canberra, ACT 0200 (Australia)

    2012-11-15T23:59:59.000Z

    Using electron diffraction, trends in the local structural behaviour of the K{sub x}Na{sub 1-x}NbO{sub 3} (KNN x) 'solid solution' system are investigated and interpreted using an order/disorder based theoretical framework. At room temperature, electron diffraction shows a single plane of transverse polarised, diffuse intensity perpendicular to [0 1 0]{sub p} Low-Asterisk (p for parent sub-structure) across the entire phase diagram, indicative of ferroelectric disorder along the [0 1 0]{sub p} direction co-existing with long range ferroelectric order along the orthogonal [1 0 0]{sub p} and [0 0 1]{sub p} directions. An additional characteristic pattern of diffuse scattering is also observed, involving rods of diffuse intensity running along the [1 0 0]{sub p}* and [0 0 1]{sub p}* directions of the perovskite sub-structure and indicative of octahedral tilt disorder about the [1 0 0]{sub p} and [0 0 1]{sub p} axes co-existing with long range ordered octahedral tilting around the [0 1 0]{sub p} direction. A possible crystal chemical explanation for the existence of this latter octahedral tilt disorder is explored through bond valence sum calculations. The possible influence of both types of disorder on the previously refined, room temperature space group/s and average crystal structure/s is examined. - Graphical abstract: [-3,0.-1]p zone axis EDP of K{sub 0.46}Na{sub 0.54}NbO{sub 3} indexed according to both the relevant Pcm21 space groups (no subscripts) and the parent perovskite subcell (denoted by a subscript p). Highlights: Black-Right-Pointing-Pointer Characterises ferroelectric and octahedral tilt disorder in the KNN solid solution. Black-Right-Pointing-Pointer Discusses the possible driving forces for this disorder. Black-Right-Pointing-Pointer Discusses the implications of this disorder for physical properties. Black-Right-Pointing-Pointer Discusses the effects of this disorder on powder diffraction data.

  17. Dual-frequency terahertz emission from splitting filaments induced by lens tilting in air

    SciTech Connect (OSTI)

    Zhang, Zhelin; Chen, Yanping, E-mail: yanping.chen@sjtu.edu.cn; Yang, Liu; Yuan, Xiaohui; Liu, Feng; Chen, Min; Xu, Jianqiu; Zhang, Jie [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Sheng, Zhengming [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom)

    2014-09-08T23:59:59.000Z

    Dual-frequency terahertz radiation from air-plasma filaments produced with two-color lasers in air has been demonstrated experimentally. When a focusing lens is tilted for a few degrees, it is shown that the laser filament evolves from a single one to two sub-filaments. Two independent terahertz sources emitted from the sub-filaments with different frequencies and polarizations are identified, where the frequency of terahertz waves from the trailing sub-filament is higher than that from the leading sub-filament.

  18. California Solar Initiative- Solar Thermal Program

    Broader source: Energy.gov [DOE]

    Originally restricted to just solar water heaters, the prorgam was expanded byCPUC Decision 13-02-018in February 2013 to include other solar thermal technologies, including solar process heatin...

  19. Accurate measurement of relative tilt and azimuth angles in electron tomography: A comparison of fiducial marker method with electron diffraction

    SciTech Connect (OSTI)

    Hayashida, Misa [National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565 (Japan); Malac, Marek; Egerton, Ray F. [National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton T6G 2M9 (Canada); Department of Physics, University of Alberta, Edmonton T6H 2E1 (Canada); Bergen, Michael; Li, Peng [National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton T6G 2M9 (Canada)

    2014-08-15T23:59:59.000Z

    Electron tomography is a method whereby a three-dimensional reconstruction of a nanoscale object is obtained from a series of projected images measured in a transmission electron microscope. We developed an electron-diffraction method to measure the tilt and azimuth angles, with Kikuchi lines used to align a series of diffraction patterns obtained with each image of the tilt series. Since it is based on electron diffraction, the method is not affected by sample drift and is not sensitive to sample thickness, whereas tilt angle measurement and alignment using fiducial-marker methods are affected by both sample drift and thickness. The accuracy of the diffraction method benefits reconstructions with a large number of voxels, where both high spatial resolution and a large field of view are desired. The diffraction method allows both the tilt and azimuth angle to be measured, while fiducial marker methods typically treat the tilt and azimuth angle as an unknown parameter. The diffraction method can be also used to estimate the accuracy of the fiducial marker method, and the sample-stage accuracy. A nano-dot fiducial marker measurement differs from a diffraction measurement by no more than 1.

  20. Solar Decathlon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretary ofSmallConfidential,2 Solar Background Document 2Solar

  1. Concentrating Solar Power

    SciTech Connect (OSTI)

    Not Available

    2008-09-01T23:59:59.000Z

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its concentrating solar power subprogram.

  2. Solar Easements & Local Option Solar Rights Laws

    Broader source: Energy.gov [DOE]

    Utah's solar easement provisions are similar to easement provisions in many other states. Parties may voluntarily enter into written solar easement contracts that are enforceable by law. An...

  3. CUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership

    E-Print Network [OSTI]

    CUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership Rooftop Solar Challenge 1 Sunshot #12;WASHINGTON PV CONTEXTWASHINGTON PV CONTEXT 285 cities, 39 Installations happen where process is easier #12;EVERGREEN STATE SOLAR PARTNERSHIP Commerce NWSEEDEdmonds

  4. Early structure formation from primordial density fluctuations with a blue-tilted power spectrum

    E-Print Network [OSTI]

    Hirano, Shingo; Yoshida, Naoki; Spergel, David; Yorke, Harold W

    2015-01-01T23:59:59.000Z

    While observations of large-scale structure and the cosmic microwave background (CMB) provide strong constraints on the amplitude of the primordial power spectrum (PPS) on scales larger than 10 Mpc, the amplitude of the power spectrum on sub-galactic length scales is much more poorly constrained. We study early structure formation in a cosmological model with a blue-tilted PPS. We assume that the standard scale-invariant PPS is modified at small length scales as $P(k) \\sim k^{m_{\\rm s}}$ with $m_{\\rm s} > 1$. We run a series of cosmological hydrodynamic simulations to examine the dependence of the formation epoch and the characteristic mass of primordial stars on the tilt of the PPS. In models with $m_{\\rm s} > 1$, star-forming gas clouds are formed at $z > 100$, when formation of hydrogen molecules is inefficient because the intense CMB radiation destroys chemical intermediates. Without efficient coolant, the gas clouds gravitationally contract while keeping a high temperature. The protostars formed in such ...

  5. The Tilt of the Fundamental Plane: Three-quarters Structural Nonhomology, One-quarter Stellar Population

    E-Print Network [OSTI]

    I. Trujillo; A. Burkert; Eric. F. Bell

    2004-01-09T23:59:59.000Z

    The variation of the mass-to-light ratios M/L of early type galaxies as function of their luminosities L is investigated. It is shown that the tilt beta=0.27 (in the B--band) of the fundamental plane relation M/L ~ L^{beta} can be understood as a combination of two effects: about one-quarter (i.e. dbeta =0.07) is a result of systematic variations of the stellar population properties with increasing luminosity. The remaining three-quarters (i.e. dbeta =0.2) can be completely attributed to nonhomology effects that lead to a systematic change of the surface brightness profiles with increasing luminosity. Consequently, the observed tilt in the K-band (beta=0.17) where stellar population effects are negligible, is explained by nonhomology effects alone. After correcting for nonhomology, the mean value of the mass-to-light ratio of elliptical galaxies (M/L_B) is 7.1+-2.8 (1 sigma scatter).

  6. UMORE PARK -INTEGRATING SOLAR Overview, Solar Optimization & Technologies, & Recommendations

    E-Print Network [OSTI]

    Netoff, Theoden

    : Introduction 3 UMore Park Overview 4 Solar Optimization 7 Passive Solar 8 Solar Technologies 10 District Solar research and development of renewable resource technologies. Integrating passive design techniques as wellUMORE PARK - INTEGRATING SOLAR Overview, Solar Optimization & Technologies, & Recommendations

  7. Mechanical and charge transport properties of alkanethiol self-assembled monolayers on Au (111) surface: The Role of Molecular Tilt

    SciTech Connect (OSTI)

    Mulleregan, Alice; Qi, Yabing; Ratera, Imma; Park, Jeong Y.; Ashby, Paul D.; Quek, Su Ying; Neaton, J. B.; Salmeron, Miquel

    2007-11-12T23:59:59.000Z

    The relationship between charge transport and mechanical properties of alkanethiol self-assembled monolayers (SAM) on Au(111) films has been investigated using an atomic force microscope with a conductive tip. Molecular tilts induced by the pressure applied by the tip cause stepwise increases in film conductivity. A decay constant {beta} = 0.57 {+-} 0.03 {angstrom}{sup -1} was found for the current passing through the film as a function of tip-substrate separation due to this molecular tilt. This is significantly smaller than the value of {approx} 1 {angstrom}{sup -1} found when the separation is changed by changing the length of the alkanethiol molecules. Calculations indicate that for isolated dithiol molecules S-bonded to hollow sites, the junction conductance does not vary significantly as a function of molecular tilt. The impact of S-Au bonding on SAM conductance is discussed.

  8. LOCATION AND MAGNETOSPHERIC MAPPING OF SATURN'S MID-LATITUDE INFRARED AURORAL OVAL

    SciTech Connect (OSTI)

    Stallard, Tom; Melin, Henrik; Cowley, Stanley W. H. [Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom); Miller, Steve [Department of Physics and Astronomy, University College London, London WC1E 6BT (United Kingdom); Lystrup, Makenzie B., E-mail: tss@ion.le.ac.u [Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, CO 80303-7814 (United States)

    2010-10-10T23:59:59.000Z

    Previous observations of Saturn's infrared aurorae have shown that a mid-latitude aurora exists significantly equatorward of the main auroral oval. Here, we present new results using data from four separate observing runs in 1998, 2003, 2008, and 2010. When combined, these provide a view of the mid-latitude aurora under a considerable range of viewing conditions, allowing the first calculation of the latitudinal position of this aurora to be made. This has shown that the mid-latitude aurora is located at the magnetic footprint of the region within the magnetosphere where the initial breakdown in corotation occurs, between 3 R {sub S} and the orbit of Enceladus ({approx}3.95 R {sub S}). We also confirm that this aurora is a continuous stable feature over a period of more than a decade and that an oval morphology is likely. When combined, these results indicate that the mid-latitude auroral oval is formed by currents driven by the breakdown process within the magnetosphere, in turn caused by mass loading from the torus of Enceladus, analogous with the volcanic moon Io's dominant role in the formation of Jupiter's main auroral oval.

  9. Eastward propagation of transient field-aligned currents and Pi 2 pulsations at auroral latitudes

    SciTech Connect (OSTI)

    Webster, D.J.; Samson, J.C.; Rostoker, G. (Univ. of Alberta, Edmonton (Canada))

    1989-04-01T23:59:59.000Z

    Transient field-aligned currents associated with the substorm expansive phase produce the damped, quasisinusoidal, geomagnetic pulsations called Pi 2's. Mid-latitude and auroral latitude measurements of the fields of these pulsations have indicated that they are produced, for the most part, by westward propagating field-aligned currents at auroral latitudes, although some studies have shown hints of eastward propagation, particularly far to the east of the longitude of the onset of the expansive phase. This study uses data from the University of Alberta magnetometer array to identify the characteristics of the eastward propagating mode at high latitudes by measuring polarizations and apparent group and phase velocities in regions far to the east of the expansive phase. The results show that eastward propagating Pi 2's have very high phase velocities (typically 40 km/s) which are comparable with those of the westward propagating mode. The polarizations and field configurations are compatible with a field-aligned and ionospheric current model which is very similar to that for the westward propagating component. These current models suggest that Pi 2's may be caused by shear Alfven waves produced by an azimuthally expanding, fast mode wave. The shear Alfven waves are reflected from the auroral ionosphere to produce the latitudinally localized field-aligned and ionospheric currents in the eastward (and westward) propagating modes.

  10. High latitude geomagnetically induced current events observed on very low frequency radio wave receiver systems

    E-Print Network [OSTI]

    Otago, University of

    High latitude geomagnetically induced current events observed on very low frequency radio wave induced current (GIC) in the Scottish power system in southern Scotland, during a storm event, and exhibit significantly different amplitude characteristics. Finally, we compared in detail the geomagnetic

  11. Friction in Mid-latitude Bob Plant, Stephen Belcher, Bob Beare, Andy Brown

    E-Print Network [OSTI]

    Plant, Robert

    Friction in Mid-latitude Cyclones Ian Boutle Bob Plant, Stephen Belcher, Bob Beare, Andy Brown #12;Motivation Many studies have shown the significance of friction in formation and dissipation of cyclones Dt = + . F . Diabatic Term: Surface heat fluxes Latent heat fluxes Frictional Term

  12. On the paucity of Fast Radio Bursts at low Galactic latitudes

    E-Print Network [OSTI]

    Macquart, Jean-Pierre

    2015-01-01T23:59:59.000Z

    We examine the effect of Galactic diffractive interstellar scintillation as a means of explaining the reported deficit of Fast Radio Burst (FRB) detections at low Galactic latitude. We model the unknown underlying FRB flux density distribution as a power law with a rate scaling as $S_\

  13. Discovery of Eight Recycled Pulsars - The Swinburne Intermediate Latitude Pulsar Survey

    E-Print Network [OSTI]

    R. T. Edwards

    1999-11-19T23:59:59.000Z

    We have conducted a pulsar survey of intermediate Galactic latitudes (15deg 0.57 Mo and > 1.2 Mo), while anotherhas a low mass (~0.2 Mo) companion in a 23.3-d orbit, residing the well-known orbital period ``gap''.

  14. A LARGE-AREA SURVEY FOR RADIO PULSARS AT HIGH GALACTIC LATITUDES

    SciTech Connect (OSTI)

    Jacoby, B. A.; Kulkarni, S. R. [Department of Astronomy, California Institute of Technology, MS 249-17, Pasadena, CA 91125 (United States); Bailes, M.; Ord, S. M. [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 31122 (Australia); Edwards, R. T. [Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, NSW 1710 (Australia)], E-mail: baj@astro.caltech.edu, E-mail: srk@astro.caltech.edu, E-mail: mbailes@swin.edu.au, E-mail: ord@physics.usyd.edu.au, E-mail: Russell.Edwards@csiro.au

    2009-07-10T23:59:59.000Z

    We have completed a survey for pulsars at high Galactic latitudes with the 64 m Parkes radio telescope. Observing with the 13 beam multibeam receiver at a frequency of 1374 MHz, we covered {approx}4150 square degrees in the region -100 deg. {<=} l {<=} 50 deg., 15 deg. {<=} |b| {<=} 30 deg. with 7232 pointings of 265 s each, thus extending the Swinburne Intermediate Latitude Pulsar Survey a further 15 deg. on either side of the Galactic plane. The signal from each beam was processed by a 96 channel x 3 MHz x 2 polarization filterbank, with the detected power in the two polarizations of each frequency channel summed and digitized with 1 bit sampling every 125 {mu}s, giving good sensitivity to millisecond pulsars with low or moderate dispersion measure. The resulting 2.4 TB data set was processed using standard pulsar search techniques with the workstation cluster at the Swinburne Centre for Astrophysics and Supercomputing. This survey resulted in the discovery of 26 new pulsars including seven binary and/or millisecond pulsars, and redetected 36 previously known pulsars. We describe the survey methodology and results, and present timing solutions for the 19 newly discovered slow pulsars, as well as for nine slow pulsars discovered the Swinburne Intermediate Latitude Pulsar Survey that had no previous timing solutions. Even with a small sampling interval, 1374 MHz center frequency, and a large mid-latitude survey volume we failed to detect any very rapidly spinning pulsars. Evidently, such 'submillisecond' pulsars are rare.

  15. High-power, low-lateral divergence broad area quantum cascade lasers with a tilted front facet

    SciTech Connect (OSTI)

    Ahn, Sangil, E-mail: sangil.ahn@tuwien.ac.at; Schwarzer, Clemens; Zederbauer, Tobias; MacFarland, Donald C.; Detz, Hermann; Andrews, Aaron M.; Schrenk, Werner; Strasser, Gottfried [Institute for Solid State Electronics, Vienna University of Technology, 1040 Vienna (Austria)

    2014-02-03T23:59:59.000Z

    We introduce a simple technique to improve the beam quality of broad area quantum cascade lasers. Moderately tilted front facets of the laser provide suppression of higher order lateral waveguide modes. A device with a width of 60??m and a front facet angle of 17 shows a nearly diffraction limited beam profile. In addition, the peak output power and the slope efficiency of the device are increased since most of the light inside the cavity is emitted through the tilted front facet by an asymmetric light intensity distribution along the cavity.

  16. Solar Impulse's Solar-Powered Plane

    SciTech Connect (OSTI)

    Moniz, Ernest; Piccard, Bertrand; Reicher, Dan

    2013-07-08T23:59:59.000Z

    Solar Impulse lands in Washington, DC at Washington Dulles International Airport as part of its journey across the United States. Secretary Ernest Moniz speaks about how advancements like those at the Department of Energy are leading the way for innovations like the solar-powered plane. Footage of the solar-powered plane courtesy of Solar Impulse.

  17. Solar Impulse's Solar-Powered Plane

    ScienceCinema (OSTI)

    Moniz, Ernest; Piccard, Bertrand; Reicher, Dan

    2014-01-07T23:59:59.000Z

    Solar Impulse lands in Washington, DC at Washington Dulles International Airport as part of its journey across the United States. Secretary Ernest Moniz speaks about how advancements like those at the Department of Energy are leading the way for innovations like the solar-powered plane. Footage of the solar-powered plane courtesy of Solar Impulse.

  18. EA-1798: Abengoa Solar's Mojave Solar Project near Barstow, CA...

    Office of Environmental Management (EM)

    Abengoa Solar's Mojave Solar Project near Barstow, CA July 1, 2011 EA-1798: Final Environmental Assessment Loan Guarantee to Mojave Solar, LLC for the Abengoa Mojave Solar...

  19. Portland, Oregon: Solar in Action (Brochure), Solar America Cities...

    Energy Savers [EERE]

    Portland, Oregon: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Portland, Oregon: Solar in Action (Brochure), Solar America Cities,...

  20. SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment

    E-Print Network [OSTI]

    Brownstone, Rob

    SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment of Dalhousie University..................................................................................................................... 1 2 Solar Resource Assessment ........................................................................................... 2 2.1 Solar Radiation

  1. China Glass Solar aka CG Solar formerly Weihai Bluestar Terra...

    Open Energy Info (EERE)

    China Glass Solar aka CG Solar formerly Weihai Bluestar Terra Photovoltaic Co Ltd Jump to: navigation, search Name: China Glass Solar (aka CG Solar, formerly Weihai Bluestar Terra...

  2. Ann Arbor, Michigan: Solar in Action (Brochure), Solar America...

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

    Ann Arbor, Michigan: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Ann Arbor, Michigan: Solar in Action (Brochure), Solar America...

  3. Berkeley, California: Solar in Action (Brochure), Solar America...

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

    Berkeley, California: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Berkeley, California: Solar in Action (Brochure), Solar America...

  4. Austin, Texas: Solar in Action (Brochure), Solar America Cities...

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

    Austin, Texas: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Austin, Texas: Solar in Action (Brochure), Solar America Cities, Energy...

  5. Knoxville, Tennessee: Solar in Action (Brochure), Solar America...

    Energy Savers [EERE]

    Knoxville, Tennessee: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Knoxville, Tennessee: Solar in Action (Brochure), Solar America...

  6. Seattle, Washington: Solar in Action (Brochure), Solar America...

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

    Seattle, Washington: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Seattle, Washington: Solar in Action (Brochure), Solar America...

  7. Seasonal dependence of localized, high-latitude dayside aurora H. U. Frey, N. stgaard, and T. J. Immel

    E-Print Network [OSTI]

    California at Berkeley, University of

    Seasonal dependence of localized, high-latitude dayside aurora (HiLDA) H. U. Frey, N. stgaard frequently observes intense ultraviolet (UV) emissions from a localized High Latitude Dayside Aurora (HiLDA) poleward of the general auroral oval location [Frey et al., 2003a]. It has been shown that this aurora

  8. REVISITING THE SOLAR TACHOCLINE: AVERAGE PROPERTIES AND TEMPORAL VARIATIONS

    SciTech Connect (OSTI)

    Antia, H. M. [Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India); Basu, Sarbani, E-mail: antia@tifr.res.in, E-mail: sarbani.basu@yale.edu [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States)

    2011-07-10T23:59:59.000Z

    The tachocline is believed to be the region where the solar dynamo operates. With over a solar cycle's worth of data available from the Michelson Doppler Imager and Global Oscillation Network Group instruments, we are in a position to investigate not merely the average structure of the solar tachocline, but also its time variations. We determine the properties of the tachocline as a function of time by fitting a two-dimensional model that takes latitudinal variations of the tachocline properties into account. We confirm that if we consider the central position of the tachocline, it is prolate. Our results show that the tachocline is thicker at latitudes higher than the equator, making the overall shape of the tachocline more complex. Of the tachocline properties examined, the transition of the rotation rate across the tachocline, and to some extent the position of the tachocline, show some temporal variations.

  9. Solar Neutrinos

    E-Print Network [OSTI]

    R. G. H. Robertson

    2006-02-05T23:59:59.000Z

    Experimental work with solar neutrinos has illuminated the properties of neutrinos and tested models of how the sun produces its energy. Three experiments continue to take data, and at least seven are in various stages of planning or construction. In this review, the current experimental status is summarized, and future directions explored with a focus on the effects of a non-zero theta-13 and the interesting possibility of directly testing the luminosity constraint. Such a confrontation at the few-percent level would provide a prediction of the solar irradiance tens of thousands of years in the future for comparison with the present-day irradiance. A model-independent analysis of existing low-energy data shows good agreement between the neutrino and electromagnetic luminosities at the +/- 20 % level.

  10. Sandia National Laboratories: Solar Energy

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

    Test Facility NSTTF Nuclear Energy photovoltaic Photovoltaics PV Renewable Energy solar Solar Energy solar power Solar Research Solid-State Lighting SSLS Connect Contact Us RSS...

  11. Solar collector

    SciTech Connect (OSTI)

    Dostrovsky, I.

    1981-02-10T23:59:59.000Z

    A solar collector unit comprises a body of rigid thermally insulating material having a surface in the shape of about half a cylindrical parabola, the parabolic surface being provided with a reflective surface, a conduit being positioned with its long axis in the median plane of the parabola, said conduit serving as conduit for the heat-exchange medium, the surface of said conduit facing the parabolic surface being a selective surface, a transparent cover being provided on top of the device.

  12. A new method to estimate annual solar wind parameters and contributions of different solar wind structures to geomagnetic activity

    E-Print Network [OSTI]

    Holappa, Lauri; Asikainen, Timo

    2015-01-01T23:59:59.000Z

    In this paper, we study two sets of local geomagnetic indices from 26 stations using the principal component (PC) and the independent component (IC) analysis methods. We demonstrate that the annually averaged indices can be accurately represented as linear combinations of two first components with weights systematically depending on latitude. We show that the annual contributions of coronal mass ejections (CMEs) and high speed streams (HSSs) to geomagnetic activity are highly correlated with the first and second IC. The first and second ICs are also found to be very highly correlated with the strength of the interplanetary magnetic field (IMF) and the solar wind speed, respectively, because solar wind speed is the most important parameter driving geomagnetic activity during HSSs while IMF strength dominates during CMEs. These results help in better understanding the long-term driving of geomagnetic activity and in gaining information about the long-term evolution of solar wind parameters and the different sol...

  13. Effects of solar wind magnetosphere coupling recorded at different geomagnetic latitudes: Separation of directly-driven and storage/

    E-Print Network [OSTI]

    Lockwood, Mike

    to isolate the responsible geomagnetic current systems. Citation: Finch, I. D., M. L. Lockwood, and A. PGL035399. 1. Introduction [2] A large number of different geomagnetic indices are currently in use are concerned with measuring general geomagnetic activity rather than any single magnetospheric phenomenon

  14. Polarization-resolved sensing with tilted fiber Bragg gratings: theory and limits of detection

    E-Print Network [OSTI]

    Bialiayeu, Aliaksandr; Albert, Jacques

    2015-01-01T23:59:59.000Z

    Polarization based sensing with tilted fiber Bragg grating (TFBG) sensors is analysed theoretically by two alternative approaches. The first method is based on tracking the grating transmission for two orthogonal states of linear polarized light that are extracted from the measured Jones matrix or Stokes vectors of the TFBG transmission spectra. The second method is based on the measurements along the system principle axes and polarization dependent loss (PDL) parameter, also calculated from measured data. It is shown that the frequent crossing of the Jones matrix eigenvalues as a function of wavelength leads to a non-physical interchange of the calculated principal axes; a method to remove this unwanted mathematical artefact and to restore the order of the system eigenvalues and the corresponding principal axes is provided. A comparison of the two approaches reveals that the PDL method provides a smaller standard deviation and therefore lower limit of detection in refractometric sensing. Furthermore, the pol...

  15. Three-dimensional microelectromechanical tilting platform operated by gear-driven racks

    DOE Patents [OSTI]

    Klody, Kelly A.; Habbit Jr., Robert D.

    2005-11-01T23:59:59.000Z

    A microelectromechanical (MEM) tiltable-platform apparatus is disclosed which utilizes a light-reflective platform (i.e. a micromirror) which is supported above a substrate by flexures which can be bent upwards to tilt the platform in any direction over an angle of generally .+-.10 degrees using a gear-driven rack attached to each flexure. Each rack is driven by a rotary microengine (i.e. a micromotor); and an optional thermal actuator can be used in combination with each microengine for initially an initial uplifting of the platform away from the substrate. The MEM apparatus has applications for optical switching (e.g. between a pair of optical fibers) or for optical beam scanning.

  16. Design, Fabrication, and Test of a Superconducting Dipole Magnet Based on Tilted Solenoids

    SciTech Connect (OSTI)

    Caspi, S.; Dietderich, D. R.; Ferracin, P.; Finney, N. R.; Fuery, M. J.; Gourlay, S. A.; Hafalia, A. R.

    2007-06-01T23:59:59.000Z

    It can be shown that, by superposing two solenoid-like thin windings that are oppositely skewed (tilted) with respect to the bore axis, the combined current density on the surface is 'cos-theta' like and the resulting magnetic field in the bore is a pure dipole. As a proof of principle, such a magnet was designed, built and tested as part of a summer undergraduate intern project. The measured field in the 25mm bore, 4 single strand layers using NbTi superconductor, exceeded 1 T. The simplicity of this high field quality design, void of typical wedges end-spacers and coil assembly, is especially suitable for insert-coils using High Temperature Superconducting wire as well as for low cost superconducting accelerator magnets for High Energy Physics. Details of the design, construction and test are reported.

  17. Tilt and running of cosmological observables in generalized single-field inflation

    SciTech Connect (OSTI)

    Bartolo, Nicola; Matarrese, Sabino [Dipartimento di Fisica ''G. Galilei'', Universit degli Studi di Padova, via Marzolo 8, I-35131 Padova (Italy); Fasiello, Matteo [Dipartimento di Fisica ''G. Occhialini'', Universit degli Studi di Milano Bicocca and INFN, Sezione di Milano Bicocca, Piazza della Scienza 3, I-20126 Milano (Italy); Riotto, Antonio, E-mail: nicola.bartolo@pd.infn.it, E-mail: matteo.fasiello@mib.infn.it, E-mail: sabino.matarrese@pd.infn.it, E-mail: riotto@mail.cern.ch [INFN, Sezione di Padova, via Marzolo 8, I-35131 Padova (Italy)

    2010-12-01T23:59:59.000Z

    Employing an effective field theory approach to inflationary perturbations, we analyze in detail the effect of curvature-generated Lagrangian operators on various observables, focusing on their running with scales. At quadratic order, we solve the equation of motion at next-to-leading leading order in a generalized slow-roll approximation for a very general theory of single-field inflation. We derive the resulting power spectrum, its tilt and running. We then focus on the contribution to the primordial non-Gaussianity amplitude f{sub NL} sourced by a specific interaction term. We show that the running of f{sub NL} can be substantially larger than what dictated by the slow-roll parameters.

  18. Solar Innovator | Alta Devices

    ScienceCinema (OSTI)

    Mattos, Laila; Le, Minh

    2013-05-29T23:59:59.000Z

    Selected to participate in the Energy Department's SunShot Initiative, Alta Devices produces solar cells that convert sunlight into electricity at world record-breaking levels of efficiency. Through its innovative solar technology Alta is helping bring down the cost of solar. Learn more about the Energy Department's efforts to advance solar technology at energy.gov/solar .

  19. Examining the Impact of Pad Flexibility on the Rotordynamic Coefficients of Rocker-Pivot-Pad Tilting-Pad Journal Bearings

    E-Print Network [OSTI]

    Gaines, Jennifer Elizabeth

    2014-12-03T23:59:59.000Z

    Measured and predicted static and dynamic load characteristics are provided for a three-pad, rocker-pivot, tilting-pad journal bearing in the load-between-pad orientation. The bearing has the following characteristics: 3 pads, .50 pad pivot offset...

  20. Rotordynamic coefficients for a load-between-pad, flexible-pivot tilting pad bearing at high loads

    E-Print Network [OSTI]

    Hensley, John Eric

    2006-10-30T23:59:59.000Z

    The dynamic and static performance of a flexure-pivot tilting pad bearing is presented at a load between pad configuration for various load and speed combinations. A similar work performed on the same bearing at lower loads ranging from 0-1 MPa (0...

  1. Dynamic and Static Characteristics of a Rocker-Pivot, Tilting-Pad Bearing with 50% and 60% Offsets.

    E-Print Network [OSTI]

    Kulhanek, Chris David

    2012-02-14T23:59:59.000Z

    Static performance and rotordynamic coefficients are provided for a rocker-pivot, tilting-pad journal bearing with 50 and 60 percent offset pads in a load-between-pad configuration. The bearing uses leading-edge-groove lubrication and has...

  2. Tilted Brownian Ratchet for DNA Analysis Lotien Richard Huang, Edward C. Cox, Robert H. Austin,*, and James C. Sturm

    E-Print Network [OSTI]

    Tilted Brownian Ratchet for DNA Analysis Lotien Richard Huang, Edward C. Cox, Robert H. Austin of fractionation of 100-kb DNA molecules in Brownian ratchet arrays. In our device, the electrophoretic flow a higher fraction of the diffusing molecules is "ratcheted" at each step in the array. Molecules of lengths

  3. Influence of a longitudinal and tilted vibration on stability and dewetting of a liquid film S. Shklyaev,1

    E-Print Network [OSTI]

    Khenner, Mikhail

    that the viscosity is important only in a thin boundary layer near the rigid wall 5,6 . This approximation works well or a tilted vibration. Using a multiscale technique we split the film motion into the oscillatory essential for the oscillatory motion. Applying the lubrication approximation for the averaged motion we

  4. Solar neutrinos and the solar composition problem

    E-Print Network [OSTI]

    Carlos Pena-Garay; Aldo Serenelli

    2008-11-16T23:59:59.000Z

    Standard solar models (SSM) are facing nowadays a new puzzle: the solar composition problem. New determinations of solar metal abundances lead SSM calculations to conflict with helioseismological measurements, showing discrepancies that extend from the convection zone to the solar core and can not be easily assigned to deficiencies in the modelling of the solar convection zone. We present updated solar neutrino fluxes and uncertainties for two SSM with high (old) and low (new) solar metallicity determinations. The uncertainties in iron and carbon abundances are the largest contribution to the uncertainties of the solar neutrino fluxes. The uncertainty on the ^14N+p -> ^15O+g rate is the largest of the non-composition uncertainties to the CNO neutrino fluxes. We propose an independent method to help identify which SSM is the correct one. Present neutrino data can not distinguish the solar neutrino predictions of both models but ongoing measurements can help to solve the puzzle.

  5. Solar Power

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz9MorganYou areInnovationPriorityImpulseSolarThermal

  6. Solar Blog

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative JC3 RSS September 9,AwardGradsSites Pending Transfer toSocial MediaSoilSolar Access

  7. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01T23:59:59.000Z

    of organic based solar cells and distinguish them from theirof nanocrystal-based solar cells. No one approach orNov, 2005). Chapter 4 Hybrid solar cells with 3-dimensional

  8. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01T23:59:59.000Z

    Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensional5 All-inorganic nanocrystal solar cells 5.1 Introduction Inoperation of organic based solar cells and distinguish them

  9. Solar Energy Entrepreneurs

    E-Print Network [OSTI]

    Rubloff, Gary W.

    Solar Energy Entrepreneurs Meeting MD, DC, DE, VA Region May 31, 2012 #12;Solar Energy Entrepreneurs Meeting MD, DC, DE, VA Region Meeting Objectives growth Make our region an increasingly stronger hub for solar power You

  10. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    are many solar photovoltaic power plants internationally andUSA, Blythe, CA Solar electric power plant, Blythe USA, SanTX Blue Wing solar electric power plant USA, Jacksonville,

  11. Solar | Department of Energy

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

    Department of Energy Using Passive Solar Design to Save Money and Energy You can harness solar energy to heat and cool your home through passive solar design. October 10, 2014...

  12. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    and William A. Beckman, Solar Energy Thermal Processes (JohnWiley, Inc" New York. Solar Energy Thermal Processes. John1977): SOLCOST, Solar Energy Design Program for Non-Thermal

  13. JEA- Solar Incentive Program

    Broader source: Energy.gov [DOE]

    The JEA Solar Incentive Program provides rebates to JEA's residential customers who install new and retrofit solar hot water heaters on their homes. The rebate is worth $800 for new solar thermal...

  14. A study of mid-latitude tropopause characteristics over eastern North America

    E-Print Network [OSTI]

    Houston, Ben Howard

    1962-01-01T23:59:59.000Z

    50 40 30 20 10 MO BUP PLT GSO 60 55 50 45 40 35 30 25 Latitude (degrees north) Figure l. Occurrence of multiple tropopauses during summer 120 IJ III 0 0 0 E 0 0 '0 N 4J 0 A N 0 100 80 60 40 20 E I CI CI -20 60 55 50 45... 40 35 30 25 Latitude (degrees north) Figure 2. Profile of mean zonal wind during summer 21 70 C 4I 0 o e e o, o o IU O N lJ o e W m 0 o 4J 4J C m Ol v 6 u Ol CI 60 50 40 30 20 10 PH NO BUF 0 SO P T 60 55 50 45 40 35...

  15. Multi-Year Lags between Forest Browning and Soil Respiration at High Northern Latitudes

    SciTech Connect (OSTI)

    Bond-Lamberty, Benjamin; Bunn, Andrew G.; Thomson, Allison M.

    2012-11-26T23:59:59.000Z

    High-latitude northern ecosystems are experiencing rapid climate changes, and represent a large potential climate feedback because of their high soil carbon densities and shifting disturbance regimes. A significant carbon flow from these ecosystems is soil respiration (RS, the flow of carbon dioxide, generated by plant roots and soil fauna, from the soil surface to atmosphere), and any change in the high-latitude carbon cycle might thus be reflected in RS observed in the field. This study used two variants of a machine-learning algorithm and least squares regression to examine how remotely-sensed canopy greenness (NDVI), climate, and other variables are coupled to annual RS based on 105 observations from 64 circumpolar sites in a global database. The addition of NDVI roughly doubled model performance, with the best-performing models explaining ~62% of observed RS variability

  16. Meridional Flow in the Solar Convection Zone II: Helioseismic Inversions of GONG Data

    E-Print Network [OSTI]

    Jackiewicz, J; Kholikov, S

    2015-01-01T23:59:59.000Z

    Meridional flow is thought to play a very important role in the dynamics of the solar convection zone; however, because of its relatively small amplitude, precisely measuring it poses a significant challenge. Here we present a complete time-distance helioseismic analysis of about two years of ground-based GONG Doppler data to retrieve the meridional circulation profile for modest latitudes, in an attempt to corroborate results from other studies. We use an empirical correction to the travel times due to an unknown center-to-limb systematic effect. The helioseismic inversion procedure is first tested and reasonably validated on artificial data from a large-scale numerical simulation, followed by a test to broadly recover the solar differential rotation found from global seismology. From GONG data, we measure poleward photospheric flows at all latitudes with properties that are comparable with earlier studies, and a shallow equatorward flow about $65$\\,Mm beneath the surface, in agreement with recent findings f...

  17. Comparative Analysis of GALLEX-GNO Solar Neutrino Data and SOHO/MDI Helioseismology Data; Further Evidence for Rotational Modulation of the Solar Neutrino Flux

    E-Print Network [OSTI]

    Peter A. Sturrock; Mark A. Weber

    2001-03-10T23:59:59.000Z

    We carry out a comparative analysis of the GALLEX-GNO solar neutrino data and estimates of the solar internal rotation rate derived from the MDI helioseismology experiment on the SOHO spacecraft. We introduce a statistic, which we evaluate as a function of radius and latitude, that is a measure of the degree of "resonance" of oscillations in the neutrino flux and the synodic solar rotation rate at that radius and latitude. A map of this statistic indicates that the probable location is deep in the convection zone near the equator. We also examine the integral of this statistic over the equatorial section of the convection zone. This provides a measure of the likelihood that the variability of the solar neutrino flux, as measured by the GALLEX-GNO data, has its origin in the equatorial section of the convection zone. We apply the shuffle test, randomly reassigning measurements among runs, to estimate the significance of the value of the statistic computed from the actual data. This test implies that the result is significant at the 0.2% level. When, for comparison, we repeat this analysis for the radiative zone, we find that the integral resonance statistic is not significant. These results support earlier evidence for rotational modulation of the solar neutrino flux.

  18. SOLAR-BLIND PYROMETRIC TEMPERATURE MEASUREMENT UNDER CONCENTRATED SOLAR

    E-Print Network [OSTI]

    SOLAR-BLIND PYROMETRIC TEMPERATURE MEASUREMENT UNDER CONCENTRATED SOLAR IRRADIATION Markus Pfnder1 temperature, pyrometric temperature measurement, solar-blind ------------------------------------ 1 #12-called solar-blind spectral measurement ranges, where the contribution of reflected solar radiation

  19. Connectable solar air collectors Solar Energy Centre Denmark

    E-Print Network [OSTI]

    Connectable solar air collectors Solar Energy Centre Denmark Danish Technological Institute SEC-R-22 #12;Connectable solar air collectors Sren stergaard Jensen Miroslav Bosanac Solar Energy Centre within the project "Connectable solar air collector/PVT collector" (Sammenkoblelig luftsolfanger

  20. Solar Industry At Work: Streamlining Home Solar Installation...

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

    Solar Industry At Work: Streamlining Home Solar Installation Solar Industry At Work: Streamlining Home Solar Installation June 12, 2012 - 11:59am Addthis Sunrun is a home solar...

  1. Relationship Between Solar Wind Speed and Coronal Magnetic Field Properties

    E-Print Network [OSTI]

    Fujiki, Ken'ichi; Iju, Tomoya; Hakamada, Kazuyuki; Kojima, Masayoshi

    2015-01-01T23:59:59.000Z

    We have studied the relationship between the solar-wind speed $[V]$ and the coronal magnetic-field properties (a flux expansion factor [$f$] and photospheric magnetic-field strength [$B_{\\mathrm{S}}$]) at all latitudes using data of interplanetary scintillation and solar magnetic field obtained for 24 years from 1986 to 2009. Using a cross-correlation analyses, we verified that $V$ is inversely proportional to $f$ and found that $V$ tends to increase with $B_{\\mathrm{S}}$ if $f$ is the same. As a consequence, we find that $V$ has extremely good linear correlation with $B_{\\mathrm{S}}/f$. However, this linear relation of $V$ and $B_{\\mathrm{S}}/f$ cannot be used for predicting the solar-wind velocity without information on the solar-wind mass flux. We discuss why the inverse relation between $V$ and $f$ has been successfully used for solar-wind velocity prediction, even though it does not explicitly include the mass flux and magnetic-field strength, which are important physical parameters for solar-wind accele...

  2. Impact of rising greenhouse gases on mid-latitude storm tracks and associated hydroclimate variability and change

    SciTech Connect (OSTI)

    Seager, Richard

    2014-12-08T23:59:59.000Z

    Project Summary This project aimed to advance physical understanding of how and why the mid-latitude jet streams and storm tracks shift in intensity and latitude in response to changes in radiative forcing with an especial focus on rising greenhouse gases. The motivation, and much of the work, stemmed from the importance that these mean and transient atmospheric circulation systems have for hydroclimate. In particular drying and expansion of the subtropical dry zones has been related to a poleward shift of the mid-latitude jets and storm tracks. The work involved integrated assessment of observation and model projections as well as targeted model simulations.

  3. Solar skylight

    DOE Patents [OSTI]

    Adamson, James C. (Osprey La., Rumson, NJ 07760)

    1984-01-01T23:59:59.000Z

    A reflective shutter rotates within a skylight housing in such a fashion as to control solar energy thereby providing a combination of heating, lighting, and ventilation. The skylight housing has three faces: a glazed southern face, a glazed northern face, and an open downwardly oriented face to the interior of the structure. Counter-weighted pivot arms support the shutter at either end causing the center of rotation to pass through the center of gravity. The shutter has three basic positions: In the first position, during the winter day, the shutter closes off the northern face, allowing solar energy to enter directly into the supporting structure providing heat gain and daylighting. In the second position, during the winter night, the shutter closes off the open face to the interior, providing insulation between the structure and the skylight housing. In the third position, during the non-heating season, the shutter closes off the southern face blocking unwanted heat gain but allowing diffuse northern light to penetrate for daylighting. In this last position, a means is provided for ventilating by natural convection. The apparatus can be operated either manually or by motor.

  4. Solar collector

    DOE Patents [OSTI]

    Wilhelm, William G. (Cutchogue, NY)

    1982-01-01T23:59:59.000Z

    The field of this invention is solar collectors, and more particularly, the invention pertains to a flat plate collector that employs high performance thin films. The solar collector of this invention overcomes several problems in this field, such as excessive hardware, cost and reliability, and other prior art drawbacks outlined in the specification. In the preferred form, the apparatus features a substantially rigid planar frame (14). A thin film window (42) is bonded to one planar side of the frame. An absorber (24) of laminate construction is comprised of two thin film layers (24a, 24b) that are sealed perimetrically. The layers (24a, 24b) define a fluid-tight planar envelope (24c) of large surface area to volume through which a heat transfer fluid flows. Absorber (24) is bonded to the other planar side of the frame. The thin film construction of the absorber assures substantially full envelope wetting and thus good efficiency. The window and absorber films stress the frame adding to the overall strength of the collector.

  5. Your Solar Home

    Broader source: Energy.gov [DOE]

    Solar Schoolhouse Education supplement for the Sacramento Bee to introduce solar to elementary school children and introduce the design and AD contest for local students.

  6. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    direct solar radiation onto the PEC cell and tracking isTracking Concentration.39 Figure 1.20: PV-RO System..42 Figure 1.21: Solar

  7. Scattering Solar Thermal Concentrators

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

    eere.energy.gov * energy.govsunshot DOEGO-102012-3669 * September 2012 MOTIVATION All thermal concentrating solar power (CSP) systems use solar tracking, which involves moving...

  8. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    modeling of solar steam- generators, solar water heating systems, Heating Ventilating and Air Conditioning (HVAC) systems, wind speed predictions, control in power generation systems,

  9. Solar Thermoelectric Energy Conversion

    Broader source: Energy.gov [DOE]

    Efficiencies of different types of solar thermoelectric generators were predicted using theoretical modeling and validated with measurements using constructed prototypes under different solar intensities

  10. Solar Energy Technologies Office

    Broader source: Energy.gov [DOE]

    In 2011, the Energy Department's Solar Energy Technologies Office (SETO) became the SunShot Initiative, a collaborative national effort that aggressively drives innovation to make solar energy...

  11. Sandia National Laboratories: Solar

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

    On April 1, 2014, in Energy, News, News & Events, Partnership, Photovoltaic, Renewable Energy, Solar, Solar Newsletter, Systems Analysis Geoff Klise (in Sandia's Earth Systems...

  12. Sandia National Laboratories: Solar

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

    Grid Integration, Infrastructure Security, News, News & Events, Photovoltaic, Renewable Energy, Solar, Solar Newsletter, Systems Engineering Matthew Reno, a Sandian and an...

  13. Sandia National Laboratories: solar

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

    Beam Profiling On November 2, 2012, in Concentrating Solar Power, News, Renewable Energy, Solar On Thursday, June 7, we began beam profiling the NSTTF field heliostat beam....

  14. Solar | Department of Energy

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

    February 14, 2014 The Ivanpah Solar Energy Generating System was dedicated on Thursday, February 13, 2014. | Photo courtesy of MingassonGetty Images for Bechtel. Making Solar...

  15. Department of Energy - Solar

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

    307 en Using Passive Solar Design to Save Money and Energy http:energy.govenergysaverarticlesusing-passive-solar-design-save-money-and-energy

  16. Sandia National Laboratories: Solar

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

    Testing Center (PV RTC), Photovoltaic Systems Evaluation Laboratory (PSEL), Renewable Energy, Solar, Solar Newsletter, SunShot, Systems Analysis A research team that included...

  17. Solar radiation resource assessment

    SciTech Connect (OSTI)

    Not Available

    1990-11-01T23:59:59.000Z

    The bulletin discusses the following: introduction; Why is solar radiation resource assessment important Understanding the basics; the solar radiation resource assessment project; and future activities.

  18. Concentrated Solar Thermoelectric Power

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

    CONCENTRATING SOLAR POWER PROGRAM REVIEW 2013 Concentrated Solar Thermoelectric Power Principal Investigator: Prof. Gang Chen Massachusetts Institute of Technology Cambridge, MA...

  19. PV Solar Ready

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

    Boudra: This report presents guidelines for designing and building new houses that are Solar Ready. Following Solar Ready guidelines will streamline the process of equipping these...

  20. Sandia National Laboratories: solar

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

    Gas Sectors in the United States View all EC Publications Related Topics Concentrating Solar Power CRF CSP EFRC Energy Energy Efficiency Energy Security National Solar Thermal...

  1. Residential Solar Rights

    Broader source: Energy.gov [DOE]

    In 2007, New Jersey enacted legislation preventing homeowners associations from prohibiting the installation of solar collectors on certain types of residential properties. The term "solar...

  2. Solar in Cold, Cloudy Climates

    Broader source: Energy.gov [DOE]

    Presentation delivered by Chuck Marken during the 2009 Northeastern Solar Cities Conference Solar Survey session.

  3. Solar Easements & Local Option Solar Rights Laws

    Broader source: Energy.gov [DOE]

    The New York General City, Town, and Village codes also allow local zoning districts to make regulations regarding solar access that provide for "the accommodation of solar energy systems and...

  4. Philadelphia, Pennsylvania: Solar in Action (Brochure), Solar...

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

    October 2011 Solar in Action Philadelphia was designated by the U.S. Department of Energy (DOE) on March 28, 2008, as Solar America City. At that time, the city presented a...

  5. NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL

    E-Print Network [OSTI]

    Phuyal, Dibya

    2012-01-01T23:59:59.000Z

    Solar Energy Materials and Solar Cells 93(10): 1728-1723,Solar Energy Materials and Solar Cells 92(8) 39. Sima, C.Y. , Warta, W. , Dunlop, E.D. Solar Cell efficiency tables (

  6. Low-latitude Western North Atlantic climate variability during the past millennium : insights from proxies and models

    E-Print Network [OSTI]

    Saenger, Casey Pearce

    2009-01-01T23:59:59.000Z

    Estimates of natural climate variability during the past millennium provide a frame of reference in which to assess the significance of recent changes. This thesis investigates new methods of reconstructing low-latitude ...

  7. Uncertainty analysis of vegetation distribution in the northern high latitudes during the 21st century with a dynamic vegetation model

    E-Print Network [OSTI]

    Jiang, Yueyang

    This study aims to assess how high-latitude vegetation may respond under various climate scenarios during the 21st century with a focus on analyzing model parameters induced uncertainty and how this uncertainty compares ...

  8. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01T23:59:59.000Z

    improving efficiencies of solar photovoltaic technologies.quantum efficiency (EQE) of the associated photovoltaic

  9. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    solar photovoltaics (PV) in electric power systems utilizingphotovoltaics (PV) in traditional electric power systems,

  10. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    USA, Jacksonville, FL Jacksonville Solar Energy Generation Facility Constructed Systems that produce electricity

  11. SOLAR ENERGY Andrew Blakers

    E-Print Network [OSTI]

    SOLAR ENERGY Andrew Blakers Director, Centre for Sustainable Energy Systems Australian National Solar energy is special. It is vast, ubiquitous and indefinitely sustainable. The solar resource utilised by photovoltaics and solar heat is hundreds of times larger than all other energy resources

  12. ENERGIA SOLAR Introduccio

    E-Print Network [OSTI]

    Batiste, Oriol

    ENERGIA SOLAR · Introducci´o · Usos t`ermics. Baixa temperatura · Sistemes de conversi´o t) Cuines Solars http://www.solarcooking.org #12;DESSALADORS SOLARS #12;APLICACIONS T`ERMIQUES BAIXA TEMPERATURA Col.lectors solars plans per a ACS #12;CONVERSI´O DIRECTA EN ELECTRICITAT C`el.lules i panells

  13. INTRODUCTIONTOTHE SOLAR ATMOSPHERE

    E-Print Network [OSTI]

    ? #12;WHAT ISTHE SOLAR ATMOSPHERE? #12;#12;1-D MODEL ATMOSPHERE Averaged over space and time GoodINTRODUCTIONTOTHE SOLAR ATMOSPHERE D. Shaun Bloomfield Trinity College Dublin #12;OUTLINE What is the solar atmosphere? How is the solar atmosphere observed? What structures exist and how do they evolve

  14. Solar Policy Environment: Houston

    Broader source: Energy.gov [DOE]

    The City of Houston is committed to achieving a sustainable solar infrastructure through strategic partnerships that address market barriers for solar energy through the Houston Solar Initiative. The initiative is dedicated to this long-term goal while focusing on near- and mid-term results that go beyond demonstration solar projects.

  15. Solar Policy Environment: Sacramento

    Broader source: Energy.gov [DOE]

    The City of Sacramento and the greater Sacramento region is the home of a long standing history of commitment to solar. Sacramento Solar Access seeks to further widespread adoption of solar energy by addressing current market barriers and preparing, through design guidelines and education, the infrastructure that will optimize solar production in the future.

  16. National Aeronautics and Space Administration On clear, dark nights at high northern latitudes,

    E-Print Network [OSTI]

    Waliser, Duane E.

    scientists want to learn when, where, and why solar wind energy stored within the Earth's magneto- sphere, and energized particles that accompany the release of energy that occurs during substorms. In particular protecting us from the fatal effects of the Solar wind." When the five identical probes align over the North

  17. Solar Policy Environment: Pittsburgh

    Broader source: Energy.gov [DOE]

    In this project, Pittsburgh plans to build on its reputation as a national leader in green practices. Its Solar America Cities project will develop a distributed approach to adoption of solar energy technologies. Pittsburghs partnership includes universities, non-profit organizations, and business, labor and foundation communities. The city plans to transform the solar energy market and stimulate early adoption of solar technology, to show that solar technology works in a northern city.

  18. Experimental frequency-dependent rotordynamic coefficients for a load-on-pad, high-speed, flexible-pivot tilting-pad bearing

    E-Print Network [OSTI]

    Rodriguez Colmenares, Luis Emigdio

    2004-09-30T23:59:59.000Z

    This thesis provides experimental frequency dependent stiffness and damping coefficient results for a high-speed, lightly loaded, flexible-pivot tilting-pad bearing, with a load-on-pad configuration. Test conditions include four shaft speeds (6000...

  19. Static characteristics and rotordynamic coefficients of a four-pad tilting-pad journal bearing with ball-in-socket pivots in load-between-pad configuration

    E-Print Network [OSTI]

    Harris, Joel Mark

    2009-05-15T23:59:59.000Z

    Static characteristics and rotordynamic coefficients were experimentally determined for a four-pad tilting-pad journal bearing with ball-in-socket pivots in loadbetween- pad configuration. A frequency-independent [M]-[C]-[K] model fit...

  20. vy physical work). Some white-collar jobs may share these characteris-tics, but these factors overwhelmingly tilt toward blue-collar occupations.

    E-Print Network [OSTI]

    Holsinger, Kent

    overwhelmingly tilt toward blue-collar occupations. Often blue-collar jobs tend to be dirty, dangerous, and of a confiscated driver's license. Loaning money and covering for behav- ioral problems are also not uncommon. Some

  1. Boston Massachusetts: Solar in Action (Brochure), Solar America...

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

    Boston, Massachusetts Includes case studies on: * Incorporating Solar into Emergency Preparedness Planning * Developing the Boston Solar Map October 2011 Solar in Action Boston was...

  2. Salt Lake City, Utah: Solar in Action (Brochure), Solar America...

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

    a lack of understanding about solar contributed to preventing the widespread adoption of solar energy in all markets. Salt Lake City's prior solar successes with support from...

  3. SciTech Connect: Solar Energy Education. Solar solutions: Reader...

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

    Solar solutions: Reader, Part III Citation Details In-Document Search Title: Solar Energy Education. Solar solutions: Reader, Part III You are accessing a document from the...

  4. Unique determination of the -CN group tilt angle in Langmuir monolayers using sum-frequency polarization null angle and phase

    SciTech Connect (OSTI)

    Velarde Ruiz Esparza, Luis A.; Wang, Hongfei

    2013-10-14T23:59:59.000Z

    The relative phase and amplitude ratio between the ssp and ppp polarization combinations of the vibrational sum-frequency generation (SFG) response can be uniquely and accurately determined by the polarization null angle (PNA) method. In this report we show that PNA measurements of the -CN vibration in the 4-n pentyl-4'-cyanoterphenyl (5CT) Langmuir monolayer at the air/water interface yields ssp and ppp response of the same phase, while those in the 4-n-octyl-4'cyanobiphenyl (8CB) Langmuir monolayer have the opposite phase. Accordingly, the -CN group in the 5CT monolayer is tilted around 25+/-2 from the interface normal, while that in the 8CB is tilted around 57+/-2, consistent with the significant differences in the phase diagrams and hydrogen bonding SFG spectra of the two Langmuir monolayers as reported in the literature. These results also demonstrate that in SFG studies the relative phase information of the different polarization combinations, especially for the ssp and ppp, is important in the unique determination of the tilt angle and conformation of a molecular group at the interface.

  5. Global helioseismic evidence for a deeply penetrating Solar meridional flow consisting of multiple flow cells

    E-Print Network [OSTI]

    Schad, A; Roth, M

    2013-01-01T23:59:59.000Z

    We use a novel global helioseismic analysis method to infer the meridional flow in the deep Solar interior. The method is based on the perturbation of eigenfunctions of Solar p modes due to meridional flow. We apply this method to time series obtained from Dopplergrams measured by the Michelson Doppler Imager aboard the Solar and Heliospheric Observatory (SOHO) covering the observation period 2004-2010. Our results show evidence that the meridional flow reaches down to the base of the convection zone. The flow profile has a complex spatial structure consisting of multiple flow cells distributed in depth and latitude. Toward the Solar surface, our results are in good agreement with flow measurements from local helioseismology.

  6. Hole-mask colloidal nanolithography combined with tilted-angle-rotation evaporation: A versatile method

    E-Print Network [OSTI]

    Braun, Paul

    ]. In hybrid solar cells and organic light emitting diodes, plasmonic nanostructures enhanced the efficiency, University of Illinois at Urbana Champaign, 312E MSEB, MC-246, 1304 W. Green Street, Urbana, Illinois 61801 to concentrate light on subwavelength scales has led to a plethora of fundamental investigations. Initially

  7. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    collaborating on a Solar Programmatic Environmental ImpactEconomic, and Environmental Benefits of the Solar AmericaEnergy and Environmental Benefits of Concentrating Solar

  8. Sandia National Laboratories: Solar Newsletter

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

    Energy, Solar, Solar Newsletter A team from Sandia National Laboratories' (SNL) National Solar Thermal Test Facility (NSTTF) recently won a first place Excellence Award in the...

  9. Bright Ideas in Solar Energy

    E-Print Network [OSTI]

    Melville, Jo

    2014-01-01T23:59:59.000Z

    Molten Nitrate Salt for Solar Energy Storage. Retrieved frommore-efficiently Solar Energy Industries Association (2012-year-review Solar Energy Industries Association (

  10. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    96 4.3.2 Customer Solar Leaseagreement financing, customer solar lease financing,eligible Minimum solar or customer-sited requirement Extra

  11. Utah Solar Outlook March 2010

    Broader source: Energy.gov [DOE]

    This presentation provides an overview of Utah's solar market, policy initiatives, and progress to date on the Solar America Cities Project: Solar Salt Lake.

  12. Solar Impulsive Energetic Electron Events

    E-Print Network [OSTI]

    Wang, Linghua

    2009-01-01T23:59:59.000Z

    coronal mass ejections and solar energetic proton events, J.Voyager observations of solar wind proton temperature:1- 10Howard (2004), Variability of solar eruptions during cycle

  13. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    10MW Thin Film Solar Power Plant for Sempra Generation. 2009). Concentrating solar power plants of the southwest1.11. Concentrating solar power plants of the southwest

  14. Sandia National Laboratories: Solar Energy

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

    in Concentrating Solar Power, Customers & Partners, Energy, News, Partnership, Renewable Energy, Solar Areva Solar is collaborating with Sandia National Laboratories on a new...

  15. Sandia National Laboratories: Solar Newsletter

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

    for Download On March 13, 2014, in Energy, News, News & Events, Photovoltaic, Renewable Energy, Solar, Solar Newsletter Sandia developed the Solar Glare Hazard Analysis Tool...

  16. Sandia National Laboratories: Solar Energy

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

    heat can also be efficiently and cheaply stored to produce electricity when the sun ... Solar Energy On February 3, 2011, in Solar Programs Photovoltaics Concentrating Solar...

  17. Sandia National Laboratories: Solar Energy

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

    Air Force Research Laboratory Testing On August 17, 2012, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, Renewable Energy, Solar...

  18. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    the shipments of two companies, BP Solar and Mitsubishiaddition, funding to solar companies increased dramaticallyand expansions of solar companies. Greater debt financing is

  19. Sandia National Laboratories: Solar Research

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

    Solar Research Pratt Whitney Rocketdyne Testing On December 19, 2012, in Concentrating Solar Power, EC, Energy, Facilities, National Solar Thermal Test Facility, News, News &...

  20. First Solar Corporate Template 2013

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

    2 Copyright 2013, First Solar, Inc. Why Are We Backtracking? 3 Copyright 2013, First Solar, Inc. Shading Response * First Solar modules are laid-out in landscape...

  1. Sandia National Laboratories: Solar Mirrors

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

    Solar Mirrors Concentrating Solar Power (CSP) On April 13, 2011, in CSP R&D at Sandia Testing Facilities Software & Tools Resources Contacts News Concentrating Solar Power...

  2. Solar Easements and Rights Laws

    Broader source: Energy.gov [DOE]

    Solar access provisions in the General Laws of Massachusetts allow for the creation of voluntary solar easements to protect solar exposure and authorizes zoning rules that prohibit unreasonable...

  3. Solar Design Workbook

    SciTech Connect (OSTI)

    Franta, G.; Baylin, F.; Crowther, R.; Dubin, F.; Grace, A., Griffith, J.W.; Holtz, M.; Kutscher, C.; Nordham, D.; Selkowitz, S.; Villecco, M.

    1981-06-01T23:59:59.000Z

    This Solar Design Workbook presents solar building design applications for commercial buildir^s. The book is divided into four sections. The first section describes the variety of solar applications in buildings including conservation aspects, solar fundamentals, passive systems, active systems, daylighting, and other solar options. Solar system design evaluation techniques including considerations for building energy requirements, passive systems, active systems, and economics are presented in Section II. The third section attempts to assist the designer in the building design process for energy conservation and solar applications including options and considerations for pre-design, design, and post-design phases. The information required for the solar design proee^ has not been fully developed at this time. Therefore, Section III is incomplete, but an overview of the considerations with some of the design proces elements is presented. Section IV illustrates ease studies that utilize solar applications in the building design.

  4. Solar dynamo models with alpha-effect and turbulent pumping from local 3D convection calculations

    E-Print Network [OSTI]

    P. J. Kpyl; M. J. Korpi; I. Tuominen

    2006-06-05T23:59:59.000Z

    (abridged) Results from kinematic solar dynamo models employing alpha-effect and turbulent pumping from local convection calculations are presented. We estimate the magnitude of these effects to be around 2-3 m/s. The rotation profile of the Sun as obtained from helioseismology is applied. We obtain an estimate of the ratio of the two induction effects, C_alpha/C_Omega \\approx 10^-3, which we keep fixed in all models. We also include a one-cell meridional circulation pattern having a magnitude of 10-20 m/s near the surface and 1-2 m/s at the bottom of the convection zone. The model essentially represents a distributed turbulent dynamo, as the alpha-effect is nonzero throughout the convection zone, although it concentrates near the bottom of the convection zone obtaining a maximum around 30 degrees of latitude. Turbulent pumping of the mean fields is predominantly down- and equatorward. We find that, when all these effects are included in the model, it is possible to correctly reproduce many features of the solar activity cycle, namely the correct equatorward migration at low latitudes and the polar branch at high latitudes, and the observed negative sign of B_r B_phi. Although the activity clearly shifts towards the equator in comparison to previous models due to the combined action of the alpha-effect peaking at midlatitudes, meridional circulation and latitudinal pumping, most of the activity still occurs at too high latitudes (between 5-60 degrees). Other problems include the relatively narrow parameter space within which the preferred solution is dipolar (A0), and the somewhat too short cycle lengths of the solar-type solutions. The role of the surface shear layer is found to be important only in the case where the alpha-effect has an appreciable magnitude near the surface.

  5. Homebuyer Solar Option and Solar Offset Program

    Broader source: Energy.gov [DOE]

    Senate Bill 1 of 2006, which established the statewide California Solar Initiative, also required the California Energy Commission (CEC) to implement regulations that require sellers of production...

  6. Solar buildings. Overview: The Solar Buildings Program

    SciTech Connect (OSTI)

    Not Available

    1998-04-01T23:59:59.000Z

    Buildings account for more than one third of the energy used in the United States each year, consuming vast amounts of electricity, natural gas, and fuel oil. Given this level of consumption, the buildings sector is rife with opportunity for alternative energy technologies. The US Department of Energy`s Solar Buildings Program was established to take advantage of this opportunity. The Solar Buildings Program is engaged in research, development, and deployment on solar thermal technologies, which use solar energy to produce heat. The Program focuses on technologies that have the potential to produce economically competitive energy for the buildings sector.

  7. Simulations of dislocation pile-ups at assymetric tilt boundaries in aluminum

    SciTech Connect (OSTI)

    Valone, Steven [Los Alamos National Laboratory; Wang, Jian M [Los Alamos National Laboratory; Hoagland, Richard C [Los Alamos National Laboratory; Germann, Timothy C [Los Alamos National Laboratory

    2011-01-21T23:59:59.000Z

    Materials deformation processes are increasingly approachable through the both conventional and accelerated molecular dynamics. In one deformation process, dislocation pile-up at a grain boundary, a greater understanding is required as to how dislocations transmit through grain boundaries, causing plastic deformation, or reflect and reconstruct the grain boundary, but with no macroscopic deformation. Here dislocation pile-ups in an alwninum bicrystal with an asymmetric tilt grain boundary are simulated atomistically, introducing effects of dislocation interactions beyond linear elastic ones. The observed responses as functions of the number of explicitly modeled dislocations and the magnitude of the applied stress are discussed. Typical conditions for the simulations consist of thermal relaxation room temperature, five active dislocations inserted within a 6.5-million-atom cell, and an additional fourteen dislocations represented within the atomistic simulation by their elastic strain fields. The dislocations are initially distributed according to linear elastic estimates of their positions in a double-ended pile-up from a chosen far-field stress. The whole cell is allowed to relax according to a procedure to be described. In the ensuing simulations, the system is propagated for some substantial period of time (lOs of ps), followed by small increments of strain. After a number of such increments, we observe all of the anticipated events. Usually several of the closest dislocations are absorbed into the grain boundary, resulting in varying amounts of reconstruction. Reflections from the boundary are common and show a strong dependence on sample thickness. Transmission events are seen on both slip systems in the other grain. The particulars of these events will be described as well.

  8. Birkeland currents and charged particles in the high-latitude prenoon region: A new interpretation

    SciTech Connect (OSTI)

    Bythrow, P.F.; Potemra, T.A.; Erlandson, R.E.; Zanetti, L.J.; Klumpar, D.M.

    1988-09-01T23:59:59.000Z

    Simultaneous, conjugate measurements of magnetic fields and charged particles at low altitude in the high-latitude prenoon sector and the magnetosheath were made with the DMSP F7, HILAT, and Active Magnetospheric Particle Tracer Explorers (AMPTE) CCE satellites on November 1, 1984. These data show that the low-latitude portion of the traditional ''cusp'' particle signature is coincident with the prenoon region 1 current system in both hemispheres and for both northward and southward interplanetary magnetic fields (IMF). The traditional ''cusp'' Birkeland currents are associated with the dispersion region of cusp ions when the IMF is directed southward and with electron fluxes that are slightly enhanced over polar rain intensities. Finally, electron spectra measured by AMPTE CCE in the magnetosheath near 1000 MLT are similar in shape and energy to those acquired at low altitude by both DMSP F7 and HILAT. These observations indicate that for both northward and southward IMF, the traditional ''cusp particle'' signature is coincident with the region 1 Birkeland current system and maps to low altitude along field lines that thread the dayside boundary layer. The traditional ''cusp'' Birkeland current system flows along field lines that lie poleward of the region of cusp particles and the region 1 current system. These field lines thread the plasma mantle. Thus, we suggest that the traditional ''cusp'' current system might be appropriately renamed the ''mantle'' Birkeland current system. copyright American Geophysical Union 1988

  9. U.S. Solar Resource Maps and Tools from the National Renewable Energy Laboratory (NREL)

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

    Solar maps provide monthly average daily total solar resource information on grid cells. The insolation values represent the resource available to a flat plate collector, such as a photovoltaic panel, oriented due south at an angle from horizontal to equal to the latitude of the collector location. [Copied from http://www.nrel.gov/gis/solar.html] Several types of solar maps are made available. The U.S. Solar resource maps show the resource potential for energy from photovoltaics and from concentrating solar power (CSP). Both sets of maps are available in low or high resolution. A dynamic map based on version 2 of PVWATTS calculates electrical energy performance estimates for a grid-connected photovoltaic system. The map of U.S. Solar Measurement Station Locations is also dynamic, showing the spatial distribution of measurement stations across the U.S. that are monitored by programs and agencies such as DOE's Atmospheric Radiation Measurement (ARM) Program or NREL's Cooperative Network for Renewable Resource Measurements (CONFRRM). Clicking on a station location will take the user to the website of that station. Finally, static map images providing solar resource information averaged by month are also available.

  10. Plasmonic conversion of solar energy

    E-Print Network [OSTI]

    Clavero, Cesar

    2014-01-01T23:59:59.000Z

    Basic Research Needs for Solar Energy Utilization, BasicS. Pillai and M. A. Green, Solar Energy Materials and SolarPlasmonic conversion of solar energy Csar Clavero Plasma

  11. Thermal Management of Solar Cells

    E-Print Network [OSTI]

    Saadah, Mohammed Ahmed

    2013-01-01T23:59:59.000Z

    heat exchangers, and solar cells," Sci-Tech News, vol. 65,Solar Energy Materials and Solar Cells, vol. 86, pp. 451-Nanostructured Silicon- Based Solar Cells, 2013. X. C. Tong,

  12. Pacific Northwest Solar Radiation Data

    E-Print Network [OSTI]

    Oregon, University of

    Pacific Northwest Solar Radiation Data UO SOLAR MONITORING LAB Physics Department -- Solar Energy Center 1274 University of Oregon Eugene, Oregon 97403-1274 April 1, 1999 #12;Hourly solar radiation data

  13. Sandia National Laboratories: solar power

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

    solar power Recent Solar Highlights On October 31, 2012, in View all Solar Energy News Molten Salt Test Loop Commissioning On October 10, 2012, in Concentrating Solar Power, EC,...

  14. BIG BEAR SOLAR OBSERVATORY CENTER FOR SOLAR-TERRESTRIAL RESEARCH

    E-Print Network [OSTI]

    BIG BEAR SOLAR OBSERVATORY CENTER FOR SOLAR-TERRESTRIAL RESEARCH Faculty Position in Solar Physics, New Jersey Institute of Technology A tenure track faculty position in solar physics is available of NJIT's program in solar physics, visit http://solar.njit.edu. Applicants are required to have a Ph

  15. Rooftop Solar Potential Distributed Solar Power in NW

    E-Print Network [OSTI]

    1 Rooftop Solar Potential Distributed Solar Power in NW Massoud Jourabchi June 2013 1 Renewables;3 Regional Growth In Solar Energy Consumption Solar consumption both Thermal and PV h b t d i i lhas been on steady increase since early 1990s. From 2000-2010 Solar PV grow at annual rate of 13% and solar thermal

  16. The Dependence of the Strength and Thickness of Field-Aligned Currents on Solar Wind and Ionospheric Parameters

    SciTech Connect (OSTI)

    Johnson, Jay R. [PPPL; Wing, Simon [Johns Hopkins University

    2014-08-01T23:59:59.000Z

    Sheared plasma flows at the low-latitude boundary layer correlate well with early afternoon auroral arcs and #12;eld-aligned currents [Sonnerup, 1980; Lundin and Evans, 1985]. We present a simple analytic model that relates solar wind and ionospheric parameters to the strength and thickness of field-aligned currents in a region of sheared velocity, such as the low latitude boundary layer. We compare the predictions of the model with DMSP observations and #12;nd remarkably good scaling of the currents with solar wind and ionospheric parameters. The sheared boundary layer thickness is inferred to be around 3000km consistent with observational studies. The analytic model provides a simple way to organize data and to infer boundary layer structures from ionospheric data.

  17. Power Challenges of Large Scale Research Infrastructures: the Square Kilometer Array and Solar Energy Integration; Towards a zero-carbon footprint next generation telescope

    E-Print Network [OSTI]

    Barbosa, Domingos; Ruiz, Valeriano; Silva, Manuel; Verdes-Montenegro, Lourdes; Santander-Vela, Juande; Maia, Dalmiro; Antn, Sonia; van Ardenne, Arnold; Vetter, Matthias; Kramer, Michael; Keller, Reinhard; Pereira, Nuno; Silva, Vitor

    2012-01-01T23:59:59.000Z

    The Square Kilometer Array (SKA) will be the largest Global science project of the next two decades. It will encompass a sensor network dedicated to radioastronomy, covering two continents. It will be constructed in remote areas of South Africa and Australia, spreading over 3000Km, in high solar irradiance latitudes. Solar Power supply is therefore an option to power supply the SKA and contribute to a zero carbon footprint next generation telescope. Here we outline the major characteristics of the SKA and some innovation approaches on thermal solar energy Integration with SKA prototypes.

  18. Residential Solar Investment Program

    Broader source: Energy.gov [DOE]

    In March 2012, the CT Green Bank* unveiled its solar photovoltaic residential investment program with the ultimate goal to support 30 megawatts of residential solar photovoltaics (PV). HB 6838...

  19. Junior Solar Sprint

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

    Junior Solar Sprint Overview The Junior Solar Sprint (JSS) Car Competition is a classroom-based, hands-on educational program for 6th, 7th, and 8th grade students. Student teams...

  20. Solar Thermoelectric Energy Conversion

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

    SOLID-STATE SOLAR-THERMAL ENERGY CONVERSION CENTER NanoEngineering Group Solar Thermoelectric Energy Conversion Gang Chen, 1 Daniel Kraemer, 1 Bed Poudel, 2 Hsien-Ping Feng, 1 J....

  1. Solar Construction Permitting Standards

    Broader source: Energy.gov [DOE]

    Owners of solar photovoltaic (PV) systems and solar water heating systems in Colorado are required to obtain a building permit before their systems may be installed. Permits are handled at the l...

  2. Solar Resource Assessment

    SciTech Connect (OSTI)

    Renne, D.; George, R.; Wilcox, S.; Stoffel, T.; Myers, D.; Heimiller, D.

    2008-02-01T23:59:59.000Z

    This report covers the solar resource assessment aspects of the Renewable Systems Interconnection study. The status of solar resource assessment in the United States is described, and summaries of the availability of modeled data sets are provided.

  3. Solar America Initiative

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

    Capacity (MW) 0.1494 20 Baseline (2006) 0.3181 1 0.069 150 2009-2010 2014-2015 BP Solar International Inc. Reaching Grid Parity Using BP Solar Crystalline Silicon Technology...

  4. CT Solar Loan

    Broader source: Energy.gov [DOE]

    The Clean Energy Finance and Investment Authority is offering a pilot loan program, CT Solar Loan, to provide homeowners with 15-year loans for solar PV equipment. The loans are administered...

  5. Solar Sales Tax Exemption

    Broader source: Energy.gov [DOE]

    For both residential and non-residential systems, the exemption applies to solar-energy systems that utilize solar radiation to produce energy designed to provide heating, cooling, hot water and/or...

  6. Solar Property Tax Exemption

    Broader source: Energy.gov [DOE]

    In Missouri, solar energy systems not held for resale are exempt from state, local, and county property taxes. As enacted in July 2013, the law does not define solar energy systems.

  7. Solar Construction Permitting Standards

    Broader source: Energy.gov [DOE]

    Owners of solar photovoltaic (PV) systems and solar water heating systems in Arizona are required to obtain a building permit before their systems may be installed. Permits are handled at the...

  8. Sandia National Laboratories: solar

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

    SunShot Initiative to decrease total cost of solar energy systems by 75% by 2020 and make solar energy cost-competitive with ... Page 3 of 1612345...10...Last Last...

  9. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    of the electrical power output to the solar power input), aSolar Energy Calculator using Google Maps 23 Table 1.24: PV System Power Production Average Daily Irradiance (kWh/m2) Instillation Efficiency Labeled Efficiency Output

  10. GLOBAL DYNAMICS OF SUBSURFACE SOLAR ACTIVE REGIONS

    SciTech Connect (OSTI)

    Jouve, L. [UPS-OMP, Institut de Recherche en Astrophysique et Planetologie, Universite de Toulouse CNRS, 14 Avenue Edouard Belin, F-31400 Toulouse (France)] [UPS-OMP, Institut de Recherche en Astrophysique et Planetologie, Universite de Toulouse CNRS, 14 Avenue Edouard Belin, F-31400 Toulouse (France); Brun, A. S. [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, IRFU/SAp, F-91191 Gif sur Yvette (France)] [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, IRFU/SAp, F-91191 Gif sur Yvette (France); Aulanier, G., E-mail: ljouve@irap.omp.eu [LESIA, Observatoire de Paris, CNRS, UPMC, Universite Paris-Diderot, 5 Place Jules Janssen, F-92190 Meudon Cedex (France)

    2013-01-01T23:59:59.000Z

    We present three-dimensional numerical simulations of a magnetic loop evolving in either a convectively stable or unstable rotating shell. The magnetic loop is introduced into the shell in such a way that it is buoyant only in a certain portion in longitude, thus creating an {Omega}-loop. Due to the action of magnetic buoyancy, the loop rises and develops asymmetries between its leading and following legs, creating emerging bipolar regions whose characteristics are similar to those of observed spots at the solar surface. In particular, we self-consistently reproduce the creation of tongues around the spot polarities, which can be strongly affected by convection. We further emphasize the presence of ring-shaped magnetic structures around our simulated emerging regions, which we call 'magnetic necklace' and which were seen in a number of observations without being reported as of today. We show that those necklaces are markers of vorticity generation at the periphery and below the rising magnetic loop. We also find that the asymmetry between the two legs of the loop is crucially dependent on the initial magnetic field strength. The tilt angle of the emerging regions is also studied in the stable and unstable cases and seems to be affected both by the convective motions and the presence of a differential rotation in the convective cases.

  11. SOLAR ENERGY POTENTIALS

    E-Print Network [OSTI]

    Loreta N. Gashi; Sabedin A. Meha; Besnik A. Duriqi; Fatos S. Haxhimusa

    In recent years solar energy has experienced phenomenal growth due to the technological improvements resulting in cost reductions and also governments policies supportive of renewable energy development and utilization. In this paper we will present possibilities for development and deployment of solar energy. We will use Kosovo to compare the existing power production potential and future possible potential by using solar energy.

  12. 7Name ________________________________ Solar Electricity.

    E-Print Network [OSTI]

    be attached directly to the outer surface of a satellite, or can be found on `solar panels' that the satellite. If the satellite is not big enough, additional solar panels may be needed to supply the electricity) The solar cells produce 0.03 watts per square cm, so the power available is 39819 x 0.03 = 1194 watts

  13. Cool Earth Solar

    ScienceCinema (OSTI)

    Lamkin, Rob; McIlroy, Andy; Swalwell, Eric; Rajan, Kish

    2014-02-26T23:59:59.000Z

    In a public-private partnership that takes full advantage of the Livermore Valley Open Campus (LVOC) for the first time, Sandia National Laboratories and Cool Earth Solar have signed an agreement that could make solar energy more affordable and accessible. In this piece, representatives from Sandia, Cool Earth Solar, and leaders in California government all discuss the unique partnership and its expected impact.

  14. Your Community With Solar

    E-Print Network [OSTI]

    Powering Your Community With Solar: Overcoming Market and Implementation Barriers Lessons from successful Solarize campaigns help communities seize volume discounts through collective purchasing The first Solarize program began in Portland, Oregon, as a grassroots campaign for collective SunShot will work

  15. Matter & Energy Solar Energy

    E-Print Network [OSTI]

    Rogers, John A.

    See Also: Matter & Energy Solar Energy· Electronics· Materials Science· Earth & Climate Energy at the University of Illinois, the future of solar energy just got brighter. Although silicon is the industry Electronics Over 1.2 Million Electronics Parts, Components and Equipment. www.AlliedElec.com solar energy

  16. Cool Earth Solar

    SciTech Connect (OSTI)

    Lamkin, Rob; McIlroy, Andy; Swalwell, Eric; Rajan, Kish

    2013-04-22T23:59:59.000Z

    In a public-private partnership that takes full advantage of the Livermore Valley Open Campus (LVOC) for the first time, Sandia National Laboratories and Cool Earth Solar have signed an agreement that could make solar energy more affordable and accessible. In this piece, representatives from Sandia, Cool Earth Solar, and leaders in California government all discuss the unique partnership and its expected impact.

  17. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    Quantifying PV power output variability, Solar Energy, vol.each solar sen at node i, P(t) the total power output of theSolar Forecasting Historically, traditional power generation technologies such as fossil and nu- clear power which were designed to run in stable output

  18. Solar Policy Environment: Milwaukee

    Broader source: Energy.gov [DOE]

    The City of Milwaukees SAC Initiative, Milwaukee Shines, works to reduce informational, economic and procedural barriers to the widespread adoption of solar energy systems. While the City of Milwaukee and its partners have demonstrated commitment and experience in implementing solar technologies, Milwaukee Shines aims to enhance these efforts and make solar a viable alternative throughout the region.

  19. Solar Policy Environment: Tucson

    Broader source: Energy.gov [DOE]

    The Tucson Solar Initiative seeks to institutionalize the value of nine years of solar energy development experience, secure the promise of renewable energy investment funds, facilitate the installation of a significant volume of installations in the community and establish a mechanism for sustainable solar integration for the future.

  20. Conservation and solar guidelines

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01T23:59:59.000Z

    Guidelines are given for selecting R-values and infiltration levels, and determining the size of the solar collection area for passive solar buildings. The guidelines are based on balancing the incremental cost/benefit of conservation and passive solar strategies. Tables are given for 90 cities in the US and the results are also displayed on maps. An example is included.

  1. Uranium vacancy mobility at the sigma 5 symmetric tilt grain boundary in UO2

    SciTech Connect (OSTI)

    Uberuaga, Blas P. [Los Alamos National Laboratory

    2012-05-02T23:59:59.000Z

    An important consequence of the fissioning process occurring during burnup is the formation of fission products. These fission products alter the thermo-mechanical properties of the fuel. They also lead to macroscopic changes in the fuel structure, including the formation of bubbles that are connected to swelling of the fuel. Subsequent release of fission gases increase the pressure in the plenum and can cause changes in the properties of the fuel pin itself. It is thus imperative to understand how fission products, and fission gases in particular, behave within the fuel in order to predict the performance of the fuel under operating conditions. Fission gas redistribution within the fuel is governed by mass transport and the presence of sinks such as impurities, dislocations, and grain boundaries. Thus, to understand how the distribution of fission gases evolves in the fuel, we must understand the underlying transport mechanisms, tied to the concentrations and mobilities of defects within the material, and how these gases interact with microstructural features that might act as sinks. Both of these issues have been addressed in previous work under NEAMS. However, once a fission product has reached a sink, such as a grain boundary, its mobility may be different there than in the grain interior and predicting how, for example, bubbles nucleate within grain boundaries necessitates an understanding of how fission gases diffuse within boundaries. That is the goal of the present work. In this report, we describe atomic level simulations of uranium vacancy diffusion in the pressence of a {Sigma}5 symmetric tilt boundary in urania (UO{sub 2}). This boundary was chosen as it is the simplest of the boundaries we considered in previous work on segregation and serves as a starting point for understanding defect mobility at boundaries. We use a combination of molecular statics calculations and kinetic Monte Carlo (kMC) to determine how the mobility of uranium vacancies is altered at this particular grain boundary. Given that the diffusion of fission gases such as Xe are tied to the mobility of uranium vacancies, these results given insight into how fission gas mobility differs at grain boundaries compared to bulk urania.

  2. Petrology of a dredged cumulate-textured gabboric complex from the mid-Atlantic ridge, latitude 26?N

    E-Print Network [OSTI]

    Tiezzi, Lawrence James

    1977-01-01T23:59:59.000Z

    PETROLOGY OF A DREDGED CUNULATE- '"EXTURED GABI3ROIC COMPLEX FROM THE MID-ATLANTIC RIDGE, LATITUDE 26 N 0 A Thesis LAWRENCE JAMES Ti'ZZI Submitted to the Graduate Ccilec;e of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE May 1977 Majo- Subject: Geology PETROLOGY OF A DREDGED CUNULATE- TEXTURED GABBROIC CONPLEX FROM o THE NID-ATLANTIC RIDGE, LATITUDE 26 N A Thesis by LAWRENCE JAMES TIEZZI Approved as to style and content by...

  3. Petrovay: Solar physics Solar wind and heliosphere THE SOLAR WIND AND THE HELIOSPHERE

    E-Print Network [OSTI]

    Petrovay, Kristóf

    with high first ionization potential are underrepresented in solar wind. Probable cause: ambipolar diffusion: Solar physics Solar wind and heliosphere Potential explanation: belt due to higher pressurePetrovay: Solar physics Solar wind and heliosphere THE SOLAR WIND AND THE HELIOSPHERE 1951: First

  4. Atick-Witten Hagedorn Conjecture, near scale-invariant matter and blue-tilted gravity power spectrum

    E-Print Network [OSTI]

    Tirthabir Biswas; Tomi Koivisto; Anupam Mazumdar

    2014-05-03T23:59:59.000Z

    We will provide an interesting new mechanism to generate almost scale invariant seed density perturbations with a red spectrum, while keeping the gravitational wave spectrum blue-tilted in a stringy thermal contracting phase at temperatures beyond the Hagedorn temperature. This phase is often referred to as the Hagedorn phase where the free energy has been conjectured by Atick and Witten to grow more slowly than ordinary radiation. The primordial fluctuations are created by the statistical thermal fluctuations determined by the partition function, rather than quantum vacuum driven fluid dynamical fluctuations. In order for our mechanism to work we require a non-singular bouncing cosmology.

  5. GHIGLS: HI mapping at intermediate Galactic latitude using the Green Bank Telescope

    E-Print Network [OSTI]

    Martin, P G; Goncalves, D Pinheiro; Lockman, Felix J; Boothroyd, A I; Miville-Deschenes, M -A; Joncas, G; Stephan, G

    2015-01-01T23:59:59.000Z

    This paper introduces the data cubes from GHIGLS, our deep Green Bank Telescope surveys of the 21-cm line emission of HI in targeted fields at intermediate Galactic latitude. The GHIGLS fields together cover over 800 square degrees at 9.55' spatial resolution. The HI spectra have an effective velocity resolution about 1.0 km/s and cover at least -450 power spectra of maps of the column density, NHI. For our featured representative field, centered on the North Ecliptic Pole, the scaling exponents in power-law representations of the power spectra of NHI maps for low, intermediate, and high velocity gas components (LVC, IVC, and HVC) are -2.90 +/- 0.03, -2.55 +/- 0.04, and -2.66 +/- 0.06, respectively. After Gaussian decomposition of the line profiles, NHI maps were also made corresponding to the broad and narrow line components in the LVC...

  6. The Mid-latitude Continental Convective Clouds (MC3E) Experiment Final Campaign Report

    SciTech Connect (OSTI)

    Jensen, Michael [Brookhaven National Laboratory; Kollias, Pavlos [McGill University; Giangrande, Scott

    2014-04-01T23:59:59.000Z

    The Mid-latitude Continental Convective Clouds Experiment (MC3E) took place from April 22 through June 6, 2011, centered at the ARM Southern Great Plains site (http://www.arm.gov/sites/sgp) in northcentral Oklahoma. MC3E was a collaborative effort between the ARM Climate Research Facility and the National Aeronautics and Space Administrations (NASAs) Global Precipitation Measurement (GPM) mission Ground Validation (GV) program. The campaign leveraged the largest ground-based observing infrastructure available in the central United States, including recent upgrades through the American Recovery and Reinvestment Act of 2009, combined with an extensive sounding array, remote sensing and in situ aircraft observations, and additional radar and in situ precipitation instrumentation. The overarching goal of the campaign was to provide a three-dimensional characterization of convective clouds and precipitation for the purpose of improving the representation of convective lifecycle in atmospheric models and the reliability of satellite-based retrievals of precipitation.

  7. Feasibility Study of Economics and Performance of Solar Photovoltaics at Johnson County Landfill

    SciTech Connect (OSTI)

    Salasovich, J.; Mosey, G.

    2012-01-01T23:59:59.000Z

    The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the Johnson County Landfill in Shawnee, Kansas, for a feasibility study of renewable energy production. Citizens of Shawnee, city planners, and site managers are interested in redevelopment uses for landfills in Kansas that are particularly well suited for grid-tied solar photovoltaic (PV) installation. This report assesses the Johnson County Landfill for possible grid-tied PV installations and estimates the cost, performance, and site impacts of three different PV options: crystalline silicon (fixed tilt), crystalline silicon (single-axis tracking), and thin film (fixed tilt). Each option represents a standalone system that can be sized to use an entire available site area. In addition, the report outlines financing options that could assist in the implementation of a system. The feasibility of PV systems installed on landfills is highly impacted by the available area for an array, solar resource, operating status, landfill cap status, distance to transmission lines, and distance to major roads. The report findings are applicable to other landfills in the surrounding area.

  8. California Solar Initiative- Solar Thermal Program

    Broader source: Energy.gov [DOE]

    '''''Note: This program was modified by AB 2249, signed in September 2012. The bill allows for non-residential solar pool heating to qualify for incentives, and requires program administrators to...

  9. Solar Energy International Solar PV 101 Training

    Office of Energy Efficiency and Renewable Energy (EERE)

    Solar Energy International is offering a five-day training that provides an overview of the three basic PV system applications, primarily focusing on grid-direct systems. The goal of the course is...

  10. What is this MCMS? MCMS stands for the MAP Climatology of Mid-latitude Storminess dataset (see

    E-Print Network [OSTI]

    arguments. Cyclone tracking is treated as a separate process and product (not shown here for brevity) depression around a mid-latitude baroclinic cyclone (or just cyclone). MCMS rests on two operations: 1) finding and tracking cyclones and 2) objectively delineating the area under each cyclones influence

  11. Latitude, seed predation and seed mass A. T. Moles* and M. Westoby Department of Biological Sciences, Macquarie University,

    E-Print Network [OSTI]

    Moles, Angela

    of species from around the world. We also aimed to quantify the slope and predictive power expected that herbivory and predation might be more sustained threats there. Considerable evidence supports winter browsing intensity and latitude across six species of woody plants (Swihart & Bryant, 2001

  12. Operational taxonomy and (paleo-)autecology of round, brown, spiny dinoflagellate cysts from the Quaternary of high northern latitudes

    E-Print Network [OSTI]

    Pedersen, Tom

    Operational taxonomy and (paleo-)autecology of round, brown, spiny dinoflagellate cysts from determination key taxonomy paleoecology Round brown spiny dinoflagellate cysts from high latitudes a synthesis of descriptions with remarks on the mor- phology, taxonomy, nomenclature and ecology of cysts from

  13. Putting plant resistance traits on the map: a test of the idea that plants are better defended at lower latitudes

    E-Print Network [OSTI]

    at lower latitudes Angela T. Moles1,2,3,4 , Ian R. Wallis3 , William J. Foley3 , David I. Warton5 , James C Biology, James Cook University, PO Box 6811,Cairns, Australia; 12 NationalEnvironmental Research InstituteSciences, University of Zambia, PO Box 32379, Lusaka 10101, Zambia;18 School of Marine and Tropical Biology, James Cook

  14. A jet streak circulation associated with a low-latitude jet in the Southern Hemisphere over Africa.

    E-Print Network [OSTI]

    Nicholson, Sharon E.

    A jet streak circulation associated with a low-latitude jet in the Southern Hemisphere over Africa 2007 #12;2 Abstract In the Southern Hemisphere over Africa a mid-tropospheric easterly jet stream exists during some months that is analogous to the African Easterly Jet over West Africa. In this note

  15. ANALYSIS OF THE CALIFORNIA SOLAR RESOURCE

    E-Print Network [OSTI]

    Berdahl, P.

    2011-01-01T23:59:59.000Z

    NEEDS FOR SOLAR RADIATION DATA SUMMARY AND DESCRIPTION OFSOURCES OF SOLAR RADIATION DATA CALI FORN IA SOLAR DATA MANNEED FOR SOLAR RADIATION DATA - Made direct contacts with

  16. ECOLOGICAL CONSIDERATIONS OF THE SOLAR ALTERNATIVE

    E-Print Network [OSTI]

    Davidson, M.

    2010-01-01T23:59:59.000Z

    et al. , April 1975. 4. Solar Thermal Conversion Missionof.Several Central Reveiver Solar Thermal Power Plant Designterm solar energy are: Included solar thermal conversion to

  17. Sandia National Laboratories: Jawaharlal Nehru Solar National...

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

    Jawaharlal Nehru Solar National Solar Energy Mission Solar Energy Research Institute for India and the United States Kick-Off On November 27, 2012, in Concentrating Solar Power,...

  18. Sandia National Laboratories: SolarReserve Inc.

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

    & Events, Partnership, Renewable Energy, Solar, Solar Newsletter SolarReserve is testing engineering units at the National Solar Thermal Test Facility (NSTTF) operated by Sandia....

  19. SELECTIVE ABSORBER COATED FOILS FOR SOLAR COLLECTORS

    E-Print Network [OSTI]

    Lampert, Carl M.

    2013-01-01T23:59:59.000Z

    fabrication of solar collector panels. adhesives and bondingdirectly to solar collector panels. the solar selectivefabrication of solar collector panels. However, the finish

  20. Sandia National Laboratories: Concentrating Solar Power

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

    Concentrating Solar Power National Solar Thermal Testing Facility Beam Profiling On November 2, 2012, in Concentrating Solar Power, News, Renewable Energy, Solar On Thursday, June...

  1. Sandia National Laboratories: multiscale concentrated solar power

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

    concentrated solar power Solar Energy Research Institute for India and the United States Kick-Off On November 27, 2012, in Concentrating Solar Power, Energy, National Solar Thermal...

  2. Helioseismology and Solar Abundances

    E-Print Network [OSTI]

    Sarbani Basu; H. M. Antia

    2007-11-28T23:59:59.000Z

    Helioseismology has allowed us to study the structure of the Sun in unprecedented detail. One of the triumphs of the theory of stellar evolution was that helioseismic studies had shown that the structure of solar models is very similar to that of the Sun. However, this agreement has been spoiled by recent revisions of the solar heavy-element abundances. Heavy element abundances determine the opacity of the stellar material and hence, are an important input to stellar model calculations. The models with the new, low abundances do not satisfy helioseismic constraints. We review here how heavy-element abundances affect solar models, how these models are tested with helioseismology, and the impact of the new abundances on standard solar models. We also discuss the attempts made to improve the agreement of the low-abundance models with the Sun and discuss how helioseismology is being used to determine the solar heavy-element abundance. A review of current literature shows that attempts to improve agreement between solar models with low heavy-element abundances and seismic inference have been unsuccessful so far. The low-metallicity models that have the least disagreement with seismic data require changing all input physics to stellar models beyond their acceptable ranges. Seismic determinations of the solar heavy-element abundance yield results that are consistent with the older, higher values of the solar abundance, and hence, no major changes to the inputs to solar models are required to make higher-metallicity solar models consistent with helioseismic data.

  3. Connectable solar air collectors Solar Energy Centre Denmark

    E-Print Network [OSTI]

    Connectable solar air collectors Solar Energy Centre Denmark Danish Technological Institute SEC-R-22 #12;Connectable solar air collectors Sren stergaard Jensen Miroslav Bosanac Solar Energy Centre Package 91 #12;92 #12;93 #12;Appendix B Working drawings for the connectable solar air collectors 94 #12

  4. Rooftop Solar Potential Distributed Solar Power in NW

    E-Print Network [OSTI]

    6/19/2013 1 Rooftop Solar Potential Distributed Solar Power in NW Massoud Jourabchi June 2013 1 in 2012 4 #12;6/19/2013 3 Regional Growth In Solar Energy Consumption Solar consumption both Thermal and PV h b t d i i lhas been on steady increase since early 1990s. From 2000-2010 Solar PV grow

  5. Petrovay: Solar physics The solar cycle ACTIVE REGIONS

    E-Print Network [OSTI]

    Petrovay, Kristf

    Petrovay: Solar physics The solar cycle ACTIVE REGIONS Large scale (up to 100 Mm) anomalies in the structure and radiation of the solar atmosphere. Photosphere : AR = cluster of strong magnetic flux tubes of facular points. Filamentary structure due to supergranulation. #12;Petrovay: Solar physics The solar cycle

  6. Reconciliation of local and long range tilt correlations in underdoped La??xBaxCuO? (0 ? x ? 0.155)

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

    Bozin, Emil S. [Brookhaven National Lab. (BNL), Upton, NY (United States); Zhong, Ruidan [Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States); Knox, Kevin R. [Brookhaven National Lab. (BNL), Upton, NY (United States); Gu, Genda [Brookhaven National Lab. (BNL), Upton, NY (United States); Hill, John P. [Brookhaven National Lab. (BNL), Upton, NY (United States); Tranquada, John M. [Brookhaven National Lab. (BNL), Upton, NY (United States); Billinge, Simon J. L. [Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)

    2015-02-01T23:59:59.000Z

    A long standing puzzle regarding the disparity of local and long range CuO? octahedral tilt correlations in the underdoped regime of La??xBaxCuO? is addressed by utilizing complementary neutron powder diffraction and inelastic neutron scattering (INS) approaches. Long-range and static CuO? tilt order with orthogonally inequivalent Cu-O bonds in the CuO? planes in the low temperature tetragonal (LTT) phase is succeeded on warming through the low-temperature transition by one with orthogonally equivalent bonds in the low temperature orthorhombic (LTO) phase. In contrast, the signatures of LTT-type tilts in the instantaneous local atomic structure persist on heating throughout the LTO crystallographic phase on the nanoscale, although becoming weaker as temperature increases. Analysis of the INS spectra for the x = 1/8 composition reveals the dynamic nature of the LTT-like tilt fluctuations within the LTO phase and their 3D character. The doping dependence of relevant structural parameters indicates that the magnitude of the Cu-O bond anisotropy has a maximum at x = 1/8 doping where bulk superconductivity is most strongly suppressed, suggesting that the structural anisotropy might be influenced by electron-phonon coupling and the particular stability of the stripe-ordered phase at this composition. The bond-length modulation that pins stripe order is found to be remarkably subtle, with no anomalous bond length disorder at low temperature, placing an upper limit on any in-plane Cu-O bondlength anisotropy. The results further reveal that although appreciable octahedral tilts persist through the high-temperature transition and into the high temperature tetragonal (HTT) phase, there is no significant preference between different tilt directions in the HTT regime. This study also exemplifies the importance of a systematic approach using complementary techniques when investigating systems exhibiting a large degree of complexity and subtle structural responses.

  7. Reconciliation of local and long range tilt correlations in underdoped La??xBaxCuO? (0 ? x ? 0.155)

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

    Bozin, Emil S.; Zhong, Ruidan; Knox, Kevin R.; Gu, Genda; Hill, John P.; Tranquada, John M.; Billinge, Simon J. L.

    2015-02-01T23:59:59.000Z

    A long standing puzzle regarding the disparity of local and long range CuO? octahedral tilt correlations in the underdoped regime of La??xBaxCuO? is addressed by utilizing complementary neutron powder diffraction and inelastic neutron scattering (INS) approaches. Long-range and static CuO? tilt order with orthogonally inequivalent Cu-O bonds in the CuO? planes in the low temperature tetragonal (LTT) phase is succeeded on warming through the low-temperature transition by one with orthogonally equivalent bonds in the low temperature orthorhombic (LTO) phase. In contrast, the signatures of LTT-type tilts in the instantaneous local atomic structure persist on heating throughout the LTO crystallographic phasemoreon the nanoscale, although becoming weaker as temperature increases. Analysis of the INS spectra for the x = 1/8 composition reveals the dynamic nature of the LTT-like tilt fluctuations within the LTO phase and their 3D character. The doping dependence of relevant structural parameters indicates that the magnitude of the Cu-O bond anisotropy has a maximum at x = 1/8 doping where bulk superconductivity is most strongly suppressed, suggesting that the structural anisotropy might be influenced by electron-phonon coupling and the particular stability of the stripe-ordered phase at this composition. The bond-length modulation that pins stripe order is found to be remarkably subtle, with no anomalous bond length disorder at low temperature, placing an upper limit on any in-plane Cu-O bondlength anisotropy. The results further reveal that although appreciable octahedral tilts persist through the high-temperature transition and into the high temperature tetragonal (HTT) phase, there is no significant preference between different tilt directions in the HTT regime. This study also exemplifies the importance of a systematic approach using complementary techniques when investigating systems exhibiting a large degree of complexity and subtle structural responses.less

  8. Evidence linking Arctic amplification to extreme weather in mid-latitudes

    E-Print Network [OSTI]

    Francis, Jennifer

    freeze- up begins, the extra solar energy absorbed during summer in these vast new expanses of open water probability of extreme weather events that result from prolonged conditions, such as drought, flooding, cold circulation will be affected, but how? While global climate models project that the frequency and intensity

  9. Inner plasma structure of the low-latitude reconnection layer Q.-H. Zhang,1

    E-Print Network [OSTI]

    Lockwood, Mike

    and Astronautical Science, JAXA, Sagamihara, Japan. 8 School of Earth and Space Sciences, Peking University, Beijing magnetosheath magnetic field is believed to control the transport of plasma and energy from the solar wind, France. 6 Mullard Space Science Laboratory, University College London, Dorking, UK. 7 Institute of Space

  10. Symmetries of migration related segments of all [001] coincidence site lattice tilt boundaries in (001) projections for all holohedral cubic materials

    SciTech Connect (OSTI)

    Moeck, Peter; York, Bryant W.; Browning, Nigel D.

    2014-09-11T23:59:59.000Z

    Utilizing bicrystallography in two dimensions (2D), the symmetries of migration related segments of Coincidence Site Lattice (CSL) boundaries are derived for projections along their [001] tilt axis in grain boundaries of crystalline materials that possess the holohedral point symmetry of the cubic system (i.e. m3m). These kinds of edge-on projections are typical for atomic resolution imaging of such tilt boundaries with Transmission Electron Microscopes (TEM). This fact facilitates the visual confirmation of our predictions by recently published Zcontrast scanning TEM investigations [H. Yang et al., Phil. Mag. 93 (2013) 1219] and many other TEM studies.

  11. Solar Chemical Peculiarities?

    E-Print Network [OSTI]

    Carlos Allende Prieto

    2006-12-08T23:59:59.000Z

    Several investigations of FGK stars in the solar neighborhood have suggested that thin-disk stars with an iron abundance similar to the Sun appear to show higher abundances of other elements, such as silicon, titanium, or nickel. Offsets could arise if the samples contain stars with ages, mean galactocentric distances, or kinematics, that differ on average from the solar values. They could also arise due to systematic errors in the abundance determinations, if the samples contain stars that are different from the Sun regarding their atmospheric parameters. We re-examine this issue by studying a sample of 80 nearby stars with solar-like colors and luminosities. Among these solar "analogs", the objects with solar iron abundances exhibit solar abundances of carbon, silicon, calcium, titanium and nickel.

  12. The Solar Argon Abundance

    E-Print Network [OSTI]

    Katharina Lodders

    2007-10-24T23:59:59.000Z

    The solar argon abundance cannot be directly derived by spectroscopic observations of the solar photosphere. The solar Ar abundance is evaluated from solar wind measurements, nucleosynthetic arguments, observations of B stars, HII regions, planetary nebulae, and noble gas abundances measured in Jupiter's atmosphere. These data lead to a recommended argon abundance of N(Ar) = 91,200(+/-)23,700 (on a scale where Si = 10^6 atoms). The recommended abundance for the solar photosphere (on a scale where log N(H) = 12) is A(Ar)photo = 6.50(+/-)0.10, and taking element settling into account, the solar system (protosolar) abundance is A(Ar)solsys = 6.57(+/-)0.10.

  13. Solar Policy Environment: Philadelphia

    Broader source: Energy.gov [DOE]

    The project will identify promising locations for photovoltaic installations and create a roadmap for commercial and residential system developers. The roadmap, published as the Solar Developers Guide to Philadelphia, will be used to promote and attract solar energy investment. Philadelphias long-term goal for solar energy is to fully utilize the potential of solar energy to safely, reliably, and cost-effectively displace the use of energy generated by fossil fuels. To achieve its solar energy goals, the City of Philadelphia must add large commercial scale (> 500 kW) solar installations to its ongoing efforts on the smaller scale (we note that a new 1 MW PV installation will be installed at the Philadelphia Navy Yard by the end of 2008).

  14. Solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L. (Livermore, CA)

    2007-09-18T23:59:59.000Z

    A solar thermal powered aircraft powered by heat energy from the sun. A heat engine, such as a Stirling engine, is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller. The heat engine has a thermal battery in thermal contact with it so that heat is supplied from the thermal battery. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  15. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2004-08-31T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  16. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2003-10-14T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  17. for doubling solar panel

    E-Print Network [OSTI]

    An outline for doubling solar panel efficiency C o l o ra do S c ho o l of M i ne s Ma g a z i ne Take a look at a solar panel on a sunny Colorado day and, if you're like most people, you won't see physics professor and solar energy researcher, who admits to checking out his panels and their energy

  18. Solar radiation intensity calculations

    E-Print Network [OSTI]

    Levine, Randolph Steven

    1978-01-01T23:59:59.000Z

    SOLAR RADIATION INTENSITY CALCULATIONS A Thesis by RANDOLPH STEVEN LEVINE Submitted to the Graduate College of Texas A&M University in partia'l fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1978 Major Subject...: Physics SOLAR RADIATION INTENSITY CALCULATIONS A Thesis by RANDOLPH STEVEN LEVINE Approved as to style and content by: (Chairman of Committee) (Member) (Member) ( member) (Head of Department) December 1978 f219 037 ABSTRACT Solar Radiation...

  19. Heterojunction solar cell

    DOE Patents [OSTI]

    Olson, J.M.

    1994-08-30T23:59:59.000Z

    A high-efficiency single heterojunction solar cell is described wherein a thin emitter layer (preferably Ga[sub 0.52]In[sub 0.48]P) forms a heterojunction with a GaAs absorber layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the emitter layer. 1 fig.

  20. Ashland, Orgen's solar strategy

    SciTech Connect (OSTI)

    Fegonese, J.A.

    1981-01-01T23:59:59.000Z

    The conceptualization, implementation, and experiences of a small southern Oregon community in attempting to increase the energy efficiency of new residential developments is outlined. The two main ordinances used are (1) a city-wide solar access ordinance, which establishes a special solar setback in the city, and (2) a new development code for housing, which provides for powerful incentives for passive solar housing. Successes and insights gained from the experience are discussed.

  1. Heterojunction solar cell

    DOE Patents [OSTI]

    Olson, Jerry M. (Lakewood, CO)

    1994-01-01T23:59:59.000Z

    A high-efficiency single heterojunction solar cell wherein a thin emitter layer (preferably Ga.sub.0.52 In.sub.0.48 P) forms a heterojunction with a GaAs absorber layer. The conversion effiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the emitter layer.

  2. Solar Policy Environment: Seattle

    Broader source: Energy.gov [DOE]

    The objective of the Emerald City Solar Initiative is to overcome the barriers to widespread deployment of solar energy technology, dramatically increasing residential, commercial, City-owned, and community-scale solar energy use. The City has assembled a strong team of partners that have proven track records in the fields of public planning, renewable energy resource mapping, financial analysis, site analysis, education and outreach, policy analysis and advocacy, community organizing and renewable energy project development.

  3. Conservation and solar guidelines

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1986-01-01T23:59:59.000Z

    Guidelines are given for selecting R-values and infiltration levels, and determining the size of the solar collection area for passive solar buildings. The guidelines are based on balancing the incremental cost/benefit of conservation and passive solar strategies. Tables are given for 90 cities in the United States and the results are also displayed on maps. The procedures are developed in an appendix, which gives the cost assumptions used and explains how to develop different guidelines for different costs.

  4. Community Solar Scenario Tool: Planning for a Fruitful Solar Garden

    Office of Energy Efficiency and Renewable Energy (EERE)

    As part of a Do-It-Yourself Solar Market Analysis summer series, NREL's Solar Technical Assistance Team (STAT) is presenting a live webinar titled, "Community Solar Scenario Tool: Planning for a...

  5. Seattle, Washington: Solar in Action (Brochure), Solar America...

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

    October 2011 Solar in Action The City of Seattle was designated by the U.S. Department of Energy (DOE) on March 28, 2008, as a Solar America City. Seattle began its Solar America...

  6. Passive solar technology

    SciTech Connect (OSTI)

    Watson, D

    1981-04-01T23:59:59.000Z

    The present status of passive solar technology is summarized, including passive solar heating, cooling and daylighting. The key roles of the passive solar system designer and of innovation in the building industry are described. After definitions of passive design and a summary of passive design principles are given, performance and costs of passive solar technology are discussed. Passive energy design concepts or methods are then considered in the context of the overall process by which building decisions are made to achieve the integration of new techniques into conventional design. (LEW).

  7. Hybrid Solar Lighting

    SciTech Connect (OSTI)

    Maxey, L Curt [ORNL

    2008-01-01T23:59:59.000Z

    Hybrid solar lighting systems focus highly concentrated sunlight into a fiber optic bundle to provide sunlight in rooms without windows or conventional skylights.

  8. Long Island Solar Farm

    SciTech Connect (OSTI)

    Anders, R.

    2013-05-01T23:59:59.000Z

    The Long Island Solar Farm (LISF) is a remarkable success story, whereby very different interest groups found a way to capitalize on unusual circumstances to develop a mutually beneficial source of renewable energy. The uniqueness of the circumstances that were necessary to develop the Long Island Solar Farm make it very difficult to replicate. The project is, however, an unparalleled resource for solar energy research, which will greatly inform large-scale PV solar development in the East. Lastly, the LISF is a superb model for the process by which the project developed and the innovation and leadership shown by the different players.

  9. Solar and Wind Rights

    Broader source: Energy.gov [DOE]

    Illinois law prohibits homeowners' associations, common interest community associations and condominium unit owners' associations from preventing homeowners from using or installing solar energy...

  10. Deed Restrictions for Solar

    Broader source: Energy.gov [DOE]

    This report summarizes the efforts made to address Task 3 - Examples of Residential Deed Restrictions Allowing Solar. The focus of the study is on communities surrounding Houston, Texas.

  11. Electromechanical solar tracking apparatus

    DOE Patents [OSTI]

    Stromberg, Robert P. (Albuquerque, NM)

    1981-01-01T23:59:59.000Z

    The invention relates to an electromechanical solar tracking device which tracks the position of the sun using paired, partially-shaded bimetallic elements.

  12. Flexible Assembly Solar Technology

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

    Energy, Inc. All rights reserved. 3 About BrightSource Energy We develop and build solar thermal projects using our own central tower technology Headquartered in...

  13. Solar energt focusing means

    SciTech Connect (OSTI)

    Tsubota, J.

    1981-11-10T23:59:59.000Z

    A highly efficient solar focusing means being hollow and in semi-cylindrical or arcuate shape, the surface has such fine menisci as to act like convex lenses to focus solar rays towards the center of the focusing body, irrespective of the position of the sun, where a solar energy conversion device is located and further acts to disperse light reflected thereonto from the solar energy conversion device. The focusing body can assume several shapes and thus can be used for roofing of a building, such as a house, or the like, and still be aesthetically pleasing.

  14. Concentrated Solar Thermoelectric Power

    Broader source: Energy.gov [DOE]

    This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 2325, 2013 near Phoenix, Arizona.

  15. Washington County- Solar Ordinance

    Broader source: Energy.gov [DOE]

    Provides for zoning restrictions on solar energy systems, including (1) six foot setbacks; (2) 20 foot height limitations on freestanding systems; (3) limitations on square feet of freestanding...

  16. Sandia National Laboratories: solar

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

    Interactive Tour Operated by Sandia National Laboratories for the U.S. Department of Energy (DOE), the National Solar Thermal Test Facility (NSTTF) is the only test facility...

  17. The Solar Chimney

    E-Print Network [OSTI]

    scul

    2002-11-27T23:59:59.000Z

    Hot air for the solar chimney is produced by the greenhouse effect in a simple air collec- tor consisting only of a glass or plastic film covering stretched...

  18. Flexible Assembly Solar Technology

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

    field and secured on steel pylons. PROJECT DESCRIPTION The research team is applying automation processes to the design of a Flexible Assembly Solar Technology (FAST). FAST is an...

  19. Solar | Department of Energy

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

    Research Award Program work on. | Photo by Dennis Schroeder, National Renewable Energy Laboratory Shining Stars of Solar: Meet Three SunShot Postdoctoral Award Recipients...

  20. Solar | Department of Energy

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

    Soft costs now account for more than 60% of the total price of installing residential solar energy systems.

  1. Solar | Department of Energy

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

    collected and discuss what has happened in their stills. June 20, 2014 Photovoltaics and Solar Energy (2 Activities) This module addresses issues dealing with the energy from the...

  2. Solar | Department of Energy

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

    Hands-on explorations to teach intermediate students the scientific concepts of solar energy. July 16, 2014 The Sun and Its Energy (11 activities) Hands-on investigations...

  3. Sandia National Laboratories: Solar

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

    Photovoltaic (PV) Regional Test Center (RTC) Website Goes Live On February 26, 2013, in Energy, National Solar Thermal Test Facility, News, News & Events, Partnership,...

  4. Sandia National Laboratories: solar

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

    Workshop On September 10, 2012, in Energy, News, Partnership, Photovoltaic, Renewable Energy, Solar Achieving High Penetrations of PV: Streamlining Interconnection and Managing...

  5. Sandia National Laboratories: Solar

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

    Mesa del Sol, Microgrid, News, News & Events, Partnership, Photovoltaic, Renewable Energy, SMART Grid, Solar, Systems Analysis, Systems Engineering The Mesa del Sol...

  6. Sandia National Laboratories: Solar

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

    Security, News, News & Events, Nuclear Energy, Photovoltaic, Renewable Energy, Solar, Transportation Energy, Wind Energy Sandia has more than a dozen scientists and...

  7. Sandia National Laboratories: Solar

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

    recent successes with metal-organic framework (MOF) materials by combining them with dye-sensitized solar cells (DSSCs). ... Page 2 of 1712345...10...Last Last Updated:...

  8. Sandia National Laboratories: solar

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

    solar Storing Hydrogen Underground Could Boost Transportation, Energy Security On February 26, 2015, in Capabilities, Center for Infrastructure Research and Innovation (CIRI),...

  9. Sandia National Laboratories: solar

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

    2011 issue of Innovation Magazine. Glitter-Sized Photovoltaic Cells in Utility-Scale Solar Power Systems On October 17, 2011, in Energy, News, Photovoltaic, Renewable Energy,...

  10. Prison Solar Project

    Broader source: Energy.gov [DOE]

    Presentation covers the Prison Solar Project for the Federal Utility Partnership Working Group (FUPWG) meeting, held on November 18-19, 2009.

  11. The Sundyne Solar Cooker

    SciTech Connect (OSTI)

    Long, J.B.

    1992-11-23T23:59:59.000Z

    Problems involved in obtaining the results from a program for user testing of 150 solar cookers in Haitian villages since the coup are detailed.

  12. Passive solar space heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1980-01-01T23:59:59.000Z

    An overview of passive solar space heating is presented indicating trends in design, new developments, performance measures, analytical design aids, and monitored building results.

  13. Passive solar design handbook

    SciTech Connect (OSTI)

    Jones, R.W.

    1981-01-01T23:59:59.000Z

    The Passive Solar Design Handbook, Volume Three updates Volume Two by presenting extensive new data on the optimum mix of conservation and solar direct gain, sunspaces, thermal storage walls, and solar radiation. The direct gain, thermal storage wall, and solar radiation data are greatly expanded relative to the Volume 2 coverage. The needed flexibility to analyze a variety of system designs is accommodated by the large number of reference designs to be encompassed - 94 in contrast to 6 in Volume two - and the large amount of sensitivity data for direct gain and sunspace systems - approximately 1100 separate curves.

  14. Solar Energy Materials & Solar Cells 91 (2007) 13881391 Bifacial configurations for CdTe solar cells

    E-Print Network [OSTI]

    Romeo, Alessandro

    2007-01-01T23:59:59.000Z

    Solar Energy Materials & Solar Cells 91 (2007) 13881391 Bifacial configurations for CdTe solar We present a different back contact for CdTe solar cell by the application of only a transparent that acts as a free-Cu stable back contact and at the same time allows to realize bifacial CdTe solar cells

  15. Concentrating Solar Power: Solar Energy Technologies Program (SETP) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-10-01T23:59:59.000Z

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its concentrating solar power subprogram.

  16. EIS-0454: Tonopah Solar Energy Crescent Dunes Solar Energy Project...

    Office of Environmental Management (EM)

    in Nye County, NV Documents Available for Download February 11, 2011 EIS-0454: Final Environmental Impact Statement Tonopah Solar Energy Crescent Dunes Solar Energy Project...

  17. EA-1683: Abengoa Solar's Solana Concentrating Solar Power Facility...

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

    Solana Concentrating Solar Power Facility, Gila Bend, AZ May 3, 2010 EA-1683: Final Environmental Assessment Loan Guarantee to Abengoa Solar Inc. for the Solana Thermal...

  18. Passive Solar Building Design and Solar Thermal Space Heating Webinar

    Broader source: Energy.gov [DOE]

    Webinar of National Renewable Energy Laboratory (NREL) Senior Engineer Andy Walker's presentation about passive solar building design and solar thermal space heating technologies and applications.

  19. Berkeley, California: Solar in Action (Brochure), Solar America...

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

    Berkeley, California Includes case studies on: * Smart Solar Independent Client Advising Service * BerkeleyFIRST-A Property Assessed Clean Energy Financing Program * Berkeley Solar...

  20. Madison, Wisconsin: Solar in Action (Brochure), Solar America...

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

    Madison, Wisconsin Includes case studies on: * Allowing Solar Energy Systems in Historic Districts * Helping Prospective Solar Owners Make Purchase Decisions * Developing Online...

  1. Solar Easements and Local Option Solar Rights Laws

    Broader source: Energy.gov [DOE]

    Utah's solar easement provisions are similar to easement provisions in many other states. Parties may voluntarily enter into written solar easement contracts that are enforceable by law. An...

  2. Fermi Large Area Telescope Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes

    SciTech Connect (OSTI)

    Abdo, A.A.; /Naval Research Lab, Wash., D.C.; Ackermann, M.; Ajello, M.; /SLAC; Anderson, B.; Atwood, W.B.; /UC, Santa Cruz; Axelsson, M.; /Stockholm U. /Stockholm U., OKC; Baldini, L.; /INFN, Pisa; Ballet, J.; /DAPNIA, Saclay; Barbiellini, G.; /INFN, Trieste /Trieste U.; Bastieri, D.; /INFN, Padua /Padua U.; Baughman, B.M.; /Taiwan, Natl. Taiwan U. /Ohio State U.; Bechtol, K.; /SLAC; Bellazzini, R.; /INFN, Pisa; Berenji, B.; Blandford, R.D.; Bloom, E.D.; /SLAC; Bonamente, E.; /INFN, Perugia /Perugia U.; Borgland, A.W.; /SLAC; Bregeon, J.; Brez, A.; /INFN, Pisa; Brigida, M.; /Bari U. /INFN, Bari /Ecole Polytechnique /Washington U., Seattle /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /IASF, Milan /DAPNIA, Saclay /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Naval Research Lab, Wash., D.C. /George Mason U. /NASA, Goddard /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Montpellier U. /Stockholm U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm /Padua U. /Naval Research Lab, Wash., D.C. /Udine U. /INFN, Trieste /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /INFN, Pisa /UC, Santa Cruz /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /CENBG, Gradignan /CENBG, Gradignan /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Montpellier U. /Bari U. /INFN, Bari /Ecole Polytechnique /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Udine U. /INFN, Trieste /Hiroshima U. /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Bari U. /INFN, Bari /INFN, Pisa /INFN, Bari /NASA, Goddard /Maryland U.; /more authors..

    2012-04-11T23:59:59.000Z

    The diffuse galactic {gamma}-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experiment Telescope (EGRET) instrument on the Compton Gamma-Ray Observatory indicated excess {gamma}-ray emission {ge}1 GeV relative to diffuse galactic {gamma}-ray emission models consistent with directly measured CR spectra (the so-called 'EGRET GeV excess'). The Large Area Telescope (LAT) instrument on the Fermi Gamma-Ray Space Telescope has measured the diffuse {gamma}-ray emission with improved sensitivity and resolution compared to EGRET. We report on LAT measurements for energies 100 MeV to 10 GeV and galactic latitudes 10{sup o} {le} |b| {le} 20{sup o}. The LAT spectrum for this region of the sky is well reproduced by a diffuse galactic {gamma}-ray emission model that is consistent with local CR spectra and inconsistent with the EGRET GeV excess.

  3. Is the northern high latitude land-based CO2 sink weakening?

    SciTech Connect (OSTI)

    Mcguire, David [University of Alaska; Kicklighter, David W. [Ecosystem Center, The; Gurney, Kevin R [Arizona State University; Burnside, Todd [University of Alaska, Fairbanks; Melillo, Jerry [Marine Biological Laboratory

    2011-01-01T23:59:59.000Z

    Studies indicate that, historically, terrestrial ecosystems of the northern high latitude region may have been responsible for up to 60% of the global net land-based sink for atmospheric CO2. However, these regions have recently experienced remarkable modification of the major driving forces of the carbon cycle, including surface air temperature warming that is significantly greater than the global average and associated increases in the frequency and severity of disturbances. Whether arctic tundra and boreal forest ecosystems will continue to sequester atmospheric CO2 in the face of these dramatic changes is unknown. Here we show the results of model simulations that estimate a 41 Tg C yr-1 sink in the boreal land regions from 1997 to 2006, which represents a 73% reduction in the strength of the sink estimated for previous decades in the late 20th Century. Our results suggest that CO2 uptake by the region in previous decades may not be as strong as previously estimated. The recent decline in sink strength is the combined result of 1) weakening sinks due to warming-induced increases in soil organic matter decomposition and 2) strengthening sources from pyrogenic CO2 emissions as a result of the substantial area of boreal forest burned in wildfires across the region in recent years. Such changes create positive feedbacks to the climate system that accelerate global warming, putting further pressure on emission reductions to achieve atmospheric stabilization targets.

  4. NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL

    E-Print Network [OSTI]

    Phuyal, Dibya

    2012-01-01T23:59:59.000Z

    551, 2005. 2. Graztel, M. Solar Energy Conversion by Dye-Y. , Warta, W. , Dunlop, E.D. Solar Cell efficiency tables (efficiency in dye-sensitized solar cells based on Tio2

  5. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    Looking backsizing the 2008 solar market. pp. 8893.Iberdrola launches its first solar thermal power plant. Analysis of a future solar market, management summary. Bonn,

  6. NEW SOLAR HOMES PARTNERSHIP FINALGUIDEBOOK

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION NEW SOLAR HOMES PARTNERSHIP FINALGUIDEBOOK DECEMBER 2006 CEC-300 Executive Director Payam Narvand Program Lead NEW SOLAR HOMES PARTNERSHIP Bill Blackburn Supervisor EMERGING RENEWABLES PROGRAM & NEW SOLAR HOMES PARTNERSHIP Drake Johnson Office Manager RENEWABLE ENERGY PROGRAM

  7. Alternative Energy Technologies Solar Power

    E-Print Network [OSTI]

    Scott, Christopher

    #12;Alternative Energy Technologies Solar Power Photovoltaics Concentrating Solar Power (CSP) Power;Concentrating Solar Power (CSP) Reflector material is Aluminum or Silver Tube material ..... Several possible ............... Mexico, Canada, Peru Alumina ............Guinea, Brazil, Australia, Jamaica Manganese ....... S. Africa

  8. Bright Ideas in Solar Energy

    E-Print Network [OSTI]

    Melville, Jo

    2014-01-01T23:59:59.000Z

    Molten Nitrate Salt for Solar Energy Storage. Retrieved fromNew Ways to Store Solar Energy. Retrieved from http://new-ways-to-store-solar-energy-16407404 Lenert, Andrej,

  9. MAGNETOHYDRODYNAMICS OF THE SOLAR TACHOCLINE

    E-Print Network [OSTI]

    ACEVEDO-ARREGUIN, LUIS ANTONIO

    2012-01-01T23:59:59.000Z

    in the solar surface (right lower panel). The magnetic ?eldin the solar surface (right lower panel). The magnetic ?eldlower panel), and the ratio of angular velocity in the solar

  10. Bright Ideas in Solar Energy

    E-Print Network [OSTI]

    Melville, Jo

    2014-01-01T23:59:59.000Z

    www.popularmechanics.com/science/energy/solar-wind/3-clever-Molten Nitrate Salt for Solar Energy Storage. Retrieved fromKrisch, J. (2014). 3 Clever New Ways to Store Solar Energy.

  11. Solar News | Department of Energy

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

    Solar News Solar News RSS March 11, 2014 U.S. and Colombia to Collaborate on First Solar Decathlon in Latin America U.S. Deputy Secretary of Energy Daniel Poneman, Colombia's...

  12. The Texas Solar D House

    E-Print Network [OSTI]

    Garrison, M.

    2004-01-01T23:59:59.000Z

    The Solar Decathlon provided a national forum for competition among fourteen university student teams, each of which designed, built, and operated a totally solar-powered home with a home office and their transportation needs using a solar...

  13. NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL

    E-Print Network [OSTI]

    Phuyal, Dibya

    2012-01-01T23:59:59.000Z

    Y. , Warta, W. , Dunlop, E.D. Solar Cell efficiency tables (in dye-sensitized solar cells based on Tio2 nanocrystal/R. J. ; Nozik, A. J. Schottky Solar Cells Based on Colloidal

  14. Thermal Management of Solar Cells

    E-Print Network [OSTI]

    Saadah, Mohammed Ahmed

    2013-01-01T23:59:59.000Z

    Nanostructured Silicon- Based Solar Cells, 2013. X. C. Tong,heat exchangers, and solar cells," Sci-Tech News, vol. 65,in crystalline silicon solar cells," Renewable Energy, vol.

  15. Thermal Management of Solar Cells

    E-Print Network [OSTI]

    Saadah, Mohammed Ahmed

    2013-01-01T23:59:59.000Z

    output electricity. Solar cells panels that employ opticalsurfaces such as the solar cell back panel and a heat panelbe shaped as a flat panel below a solar cells array with fin

  16. Solar Easements and Rights Laws

    Broader source: Energy.gov [DOE]

    New Mexico's Solar Rights and Solar Recordation Acts (both contained in NMSA 47-3) allow property owners to create solar easements for the purpose of protecting and maintaining proper access to...

  17. Solar light bulb

    SciTech Connect (OSTI)

    Smith, D.A.

    1983-07-26T23:59:59.000Z

    A system for generating light directly using solar energy is provided herein. It includes a concentrator and accumulator for the sun's rays to generate a concentrated beam of visible solar radiation. A distributor shaft is provided for distributing the beam of visible solar radiation. A fork is provided in the distributor shaft to define a plurality of branch lines, each provided with a mirror at the intersection to direct the beam down the respective branch line to permit parallel fractions of the beam to be reflected off the respective mirrors and to pass down the respective branch line. A solar bulb is provided including a double walled upper bulbous portion including the inlet from the branch line and a pair of heat outlet tubes, and a double walled lower bulbous portion, the upper portion thereof being divergently reflective, with the lower portion having walls which are either transparent or translucent to provide greater light diffusion, and the space between the two walls being maintained under vacuum to provide heat insulation values. A structure is provided within the solar bulb for the absorption and radiation of the concentrated beam of visible solar radiation. Preferably structure is provided connected to the solar bulb to draw in outside air in the summer to direct it past the solar bulb and to air vent hot air produced at the solar bulb to the outside, thereby providing light with minimal heat in the summer. The same structure is operated in the winter to draw in household air to direct it past the solar bulb and to recirculate such heated air produced at the solar bulb to the house, thereby providing light and heat in the winter.

  18. Study of the interaction of solutes with ?5 (013) tilt grain boundaries in iron using density-functional theory

    SciTech Connect (OSTI)

    Jin, Hao; Militzer, Matthias [Centre for Metallurgical Process Engineering, The University of British Columbia, Vancouver, British Columbia V6T 1Z4 (Canada); Elfimov, Ilya [Quantum Matter Institute, The University of British Columbia, Vancouver, British Columbia V6T 1Z4 (Canada)

    2014-03-07T23:59:59.000Z

    Substitutional alloying elements significantly affect the recrystallization and austenite-ferrite phase transformation rates in steels. The atomistic mechanisms of their interaction with the interfaces are still largely unexplored. Using density functional theory, we determine the segregation energies between commonly used alloying elements and the ?5 (013) tilt grain boundary in bcc iron. We find a strong solute-grain boundary interaction for Nb, Mo, and Ti that is consistent with experimental observations of the effects of these alloying elements on delaying recrystallization and the austenite-to-ferrite transformation in low-carbon steels. In addition, we compute the solute-solute interactions as a function of solute pair distance in the grain boundary, which suggest co-segregation for these large solutes at intermediate distances in striking contrast to the bulk.

  19. The sensitivity enhancement of tilted fibre Bragg grating sensors with polarization dependent resonant nano-scale coatings

    E-Print Network [OSTI]

    Bialiayeu, Aliaksandr

    2015-01-01T23:59:59.000Z

    Fibre Bragg grating sensors have emerged as a simple, inexpensive, accurate, sensitive and reliable platform, a viable alternative to the traditional bulkier optical sensor platforms. In this work we present an extensive theoretical analysis of the tilted fibre Bragg grating sensor (TFBG) with a particular focus on its polarization-dependent properties. We have developed a highly efficient computer model capable of providing the full characterization of the TFBG device in less then $3$~minutes for a given state of incident light polarization. As a result, the polarization-dependent spectral response, the field distribution at the sensor surface as well as the fine structure of particular resonances have become accessible for theoretical analysis. As a part of this computer model we have developed a blazingly fast full-vector complex mode solver, capable of handling cylindrical waveguides of an arbitrary complex refractive index profile. Along with the theoretical study we have investigated optical properties ...

  20. Yearly average performance of the principal solar collector types

    SciTech Connect (OSTI)

    Rabl, A.

    1981-01-01T23:59:59.000Z

    The results of hour-by-hour simulations for 26 meteorological stations are used to derive universal correlations for the yearly total energy that can be delivered by the principal solar collector types: flat plate, evacuated tubes, CPC, single- and dual-axis tracking collectors, and central receiver. The correlations are first- and second-order polynomials in yearly average insolation, latitude, and threshold (= heat loss/optical efficiency). With these correlations, the yearly collectible energy can be found by multiplying the coordinates of a single graph by the collector parameters, which reproduces the results of hour-by-hour simulations with an accuracy (rms error) of 2% for flat plates and 2% to 4% for concentrators. This method can be applied to collectors that operate year-around in such a way that no collected energy is discarded, including photovoltaic systems, solar-augmented industrial process heat systems, and solar thermal power systems. The method is also recommended for rating collectors of different type or manufacturer by yearly average performance, evaluating the effects of collector degradation, the benefits of collector cleaning, and the gains from collector improvements (due to enhanced optical efficiency or decreased heat loss per absorber surface). For most of these applications, the method is accurate enough to replace a system simulation.

  1. Solar Energy Fundamentals

    E-Print Network [OSTI]

    Harlan H. Bengtson; Harlan H. Bengtson

    Solar energy travels from the sun to the earth in the form of electromagnetic radiation. In this course properties of electromagnetic radiation will be discussed and basic calculations for electromagnetic radiation will be described. Several solar position parameters will be discussed along with means of calculating

  2. and solar activity

    E-Print Network [OSTI]

    Memorie Della; K. Georgieva; C. Bianchi; B. Kirov

    Abstract. Solar activity, together with human activity, is considered a possible factor for the global warming observed in the last century. However, in the last decades solar activity has remained more or less constant while surface air temperature has continued to increase, which is interpreted as an evidence that in this period human activity is the main factor for global warming. We show that the index commonly used for quantifying long-term changes in solar activity, the sunspot number, accounts for only one part of solar activity and using this index leads to the underestimation of the role of solar activity in the global warming in the recent decades. A more suitable index is the geomagnetic activity which reflects all solar activity, and it is highly correlated to global temperature variations in the whole period for which we have data. Key words. Solar activity, Global warming 1. Sunspot number and global temperature The most popular index of solar activity is the International sunspot number (R). A reconstruction

  3. Solar Policy Environment: Berkeley

    Broader source: Energy.gov [DOE]

    The goals of this project are to (1) accelerate the adoption of solar technology at the local level by engaging the City, service providers, end users and regulators; (2) provide a model for other cities; and (3) promote solar technology among residents and local businesses.

  4. Solar Radiation Research Laboratory (Poster)

    SciTech Connect (OSTI)

    Stoffel, T.; Andreas, A.; Reda, I.; Dooraghi, M.; Habte, A.; Kutchenreiter, M.; Wilcox, S.

    2012-07-01T23:59:59.000Z

    SunShot Initiative awardee posters describing the different technologies within the four subprograms of the DOE Solar Program (Photovoltaics, Concentrating Solar Power, Soft Costs, and Systems Integration).

  5. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    transportation costs. China's CSG Solar Glass Co. built theSolar Suntech Power, a Chinese crystalline silicon company with production in China,

  6. Thermal Management of Solar Cells

    E-Print Network [OSTI]

    Saadah, Mohammed Ahmed

    2013-01-01T23:59:59.000Z

    ratio of the solar cell output power to the incident lightpower to operate the fan. Natural cooling is preferred for solar

  7. RidgenoseSolarInterconnectionProject

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

    to a request from Longview Solar, LLC, to interconnect their proposed Cliffrose Solar Energy Plant, located south of Kingman, Mohave County, Arizona to Westerns...

  8. Sandia National Laboratories: Solar Newsletter

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

    Photovoltaic Regional Test Center (RTC). The RTC will enable research on integrating solar panels into the statewide smart grid and help reduce the cost of solar power. The...

  9. Sandia National Laboratories: Solar Glitter

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

    cells in utility-scale solar power systems, which eventually could cut the costs of solar panels in half and nearly double their efficiency. Sandia's work with industry,...

  10. Sandia National Laboratories: solar power

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

    Photovoltaic Regional Test Center (RTC). The RTC will enable research on integrating solar panels into the statewide smart grid and help reduce the cost of solar power. The...

  11. Foundational Solar Resource Research (Poster)

    SciTech Connect (OSTI)

    Orwig, K.; Wilcox, S.; Sengupta, M.; Habte, A.; Anderberg, M.; Stoffel, T.

    2012-07-01T23:59:59.000Z

    SunShot Initiative awardee posters describing the different technologies within the four subprograms of the DOE Solar Program (Photovoltaics, Concentrating Solar Power, Soft Costs, and Systems Integration).

  12. Sandia National Laboratories: Solar Newsletter

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

    Testing Center (PV RTC), Photovoltaic Systems Evaluation Laboratory (PSEL), Renewable Energy, Solar, Solar Newsletter, SunShot, Systems Analysis A research team that included...

  13. Sandia National Laboratories: Solar Tower

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

    top ... Thermal Pulses for Boeing Test Article On September 6, 2012, in Concentrating Solar Power, EC, Energy, National Solar Thermal Test Facility, News, Partnership,...

  14. Sandia National Laboratories: Solar Newsletter

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

    News & Events, Photovoltaic, Photovoltaic Systems Evaluation Laboratory (PSEL), Renewable Energy, Solar, Solar Newsletter, SunShot Sandia's Kenneth Armijo (in the Photovoltaic &...

  15. Sandia National Laboratories: Solar Newsletter

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

    Sandia Wins Three R&D100 Awards On July 24, 2013, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, News & Events, Photovoltaic,...

  16. Sandia National Laboratories: solar power

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

    Strategic Partnership Projects On April 14, 2011, in National Solar Thermal Test Facility (NSTTF) The Tower at the National Solar Thermal Test Facility (NSTTF) offers a complete...

  17. Sandia National Laboratories: Solar Newsletter

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

    Earth Solar (CES) have signed a five-year cooperative research & development agreement (CRADA) that could make solar energy more affordable and accessible. The CRADA calls for...

  18. 2007 Solar America Cities Awards

    SciTech Connect (OSTI)

    Not Available

    2007-06-01T23:59:59.000Z

    This factsheet gives an overview of the Solar America Cities Awards and the Solar America Initiative (SAI). A map of all SAI projects is also made available.

  19. Sandia National Laboratories: Solar Two

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

    Workers Received Entrepreneurial Spirit Awards On April 3, 2013, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, News & Events,...

  20. Sandia National Laboratories: Areva Solar

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

    Labs Join Forces for CLFR Molten-Salt Storage On September 17, 2012, in Concentrating Solar Power, Customers & Partners, Energy, News, Partnership, Renewable Energy, Solar...

  1. Solar Policy Environment: Ann Arbor

    Broader source: Energy.gov [DOE]

    The goal for Ann Arbors Solar America Cities program is to utilize a wide range of community partners and resources to remove market barriers to the adoption of solar energy while simultaneously increasing consumer awareness and demand, and helping solar energy manufacturers and contractors to succeed. Expected outcomes include a Solar Plan for Ann Arbor, one or more large-scale photovoltaic demonstration projects, more small-scale solar hot water and photovoltaic demonstration projects, greater consumer awareness of solar options, a simpler permitting process for solar projects, and proof that solar energy works even in cloudy cities.

  2. SELECTIVE ABSORBER COATED FOILS FOR SOLAR COLLECTORS

    E-Print Network [OSTI]

    Lampert, Carl M.

    2013-01-01T23:59:59.000Z

    of the solar foil market, other companies are becomingor company. ILLUSTRATIVE EXAMPLES OF COMMERCIAL SOLAR FOILS

  3. Crystallographically tilted and partially strain relaxed GaN grown on inclined (111) facets etched on Si(100) substrate

    SciTech Connect (OSTI)

    Ansah Antwi, K. K. [Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore); Institute of Materials Research and Engineering, 3 Research Link, 117602 Singapore (Singapore); Soh, C. B. [Singapore Institute of Technology, 10 Dover Drive, Singapore 138683 (Singapore); Wee, Q. [Singapore-MIT Alliance, National University of Singapore, Singapore 117576 (Singapore); Tan, Rayson J. N.; Tan, H. R. [Institute of Materials Research and Engineering, 3 Research Link, 117602 Singapore (Singapore); Yang, P. [Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, 117603 Singapore (Singapore); Sun, L. F.; Shen, Z. X. [School of Physical and Mathematical Sciences, Nanyang Technological University, SPMS-03-01, 21 Nanyang Link (Singapore); Chua, S. J., E-mail: elecsj@nus.edu.sg [Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore); Institute of Materials Research and Engineering, 3 Research Link, 117602 Singapore (Singapore); Singapore-MIT Alliance, National University of Singapore, Singapore 117576 (Singapore)

    2013-12-28T23:59:59.000Z

    High resolution X-ray diffractometry (HR-XRD), Photoluminescence, Raman spectroscopy, and Transmission electron microscope measurements are reported for GaN deposited on a conventional Si(111) substrate and on the (111) facets etched on a Si(100) substrate. HR-XRD reciprocal space mappings showed that the GaN(0002) plane is tilted by about 0.63??0.02 away from the exposed Si(111) growth surface for GaN deposited on the patterned Si(100) substrate, while no observable tilt existed between the GaN(0002) and Si(111) planes for GaN deposited on the conventional Si(111) substrate. The ratio of integrated intensities of the yellow to near band edge (NBE) luminescence (I{sub YL}/I{sub NBE}) was determined to be about one order of magnitude lower in the case of GaN deposited on the patterned Si(100) substrate compared with GaN deposited on the conventional Si(111) substrate. The Raman E{sub 2}(high) optical phonon mode at 565.224??0.001?cm{sup ?1} with a narrow full width at half maximum of 1.526??0.002?cm{sup ?1} was measured, for GaN deposited on the patterned Si(100) indicating high material quality. GaN deposition within the trench etched on the Si(100) substrate occurred via diffusion and mass-transport limited mechanism. This resulted in a differential GaN layer thickness from the top (i.e., 1.8??m) of the trench to the bottom (i.e., 0.3??m) of the trench. Mixed-type dislocation constituted about 80% of the total dislocations in the GaN grown on the inclined Si(111) surface etched on Si(100)

  4. Cluster characters II: A multiplication formula Let C be a Hom-finite triangulated 2-CalabiYau category with a cluster tilting object. Under

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cluster characters II: A multiplication formula Yann Palu Abstract Let C be a Hom categories of modules over a preprojective algebra of Dynkin type, we prove a multiplication formula for the cluster character associated with any cluster tilting object. This formula generalizes those obtained

  5. PS-wave moveout inversion for tilted TI media: A physical-modeling study Pawan Dewangan and Ilya Tsvankin , Center for Wave Phenomena, Colorado School of Mines (CSM),

    E-Print Network [OSTI]

    PS-wave moveout inversion for tilted TI media: A physical-modeling study Pawan Dewangan and Ilya Tsvankin , Center for Wave Phenomena, Colorado School of Mines (CSM), Mike Batzle, Center for Rock Abuse, CSM, Kasper van Wijk, Physical Acoustics Laboratory, CSM, and Matt Haney, Center for Wave Phenomena

  6. Measurements Versus Predictions for the Static and Dynamic Characteristics of a Four-pad Rocker-pivot, Tilting-pad Journal Bearing

    E-Print Network [OSTI]

    Tschoepe, David 1987-

    2012-08-16T23:59:59.000Z

    Measured and predicted static and dynamic characteristics are provided for a four-pad, rocker-pivot, tilting-pad journal bearing in the load-on-pad and load-between-pad orientations. The bearing has the following characteristics: 4 pads, .57 pad...

  7. Measured and predicted rotordynamic coefficients and static performance of a rocker-pivot, tilt pad bearing in load-on-pad and load-between-pad configurations

    E-Print Network [OSTI]

    Carter, Clint Ryan

    2009-06-02T23:59:59.000Z

    This thesis presents the static and dynamic performance data for a 5 pad tilting pad bearing in both the load-on-pad (LOP) and the load-between-pad (LBP) configurations over a variety of different loads and speeds. The bearing tested was an Orion...

  8. Spectroscopy of Solar Neutrinos

    E-Print Network [OSTI]

    Michael Wurm; Franz von Feilitzsch; Marianne Goeger-Neff; Tobias Lachenmaier; Timo Lewke; Quirin Meindl; Randoplh Moellenberg; Lothar Oberauer; Walter Potzel; Marc Tippmann; Christoph Traunsteiner; Juergen Winter

    2010-04-06T23:59:59.000Z

    In the last years, liquid-scintillator detectors have opened a new window for the observation of low-energetic astrophysical neutrino sources. In 2007, the solar neutrino experiment Borexino began its data-taking in the Gran Sasso underground laboratory. High energy resolution and excellent radioactive background conditions in the detector allow the first-time spectroscopic measurement of solar neutrinos in the sub-MeV energy regime. The experimental results of the Beryllium-7 neutrino flux measurements as well as the prospects for the detection of solar Boron-8, pep and CNO neutrinos are presented in the context of the currently discussed ambiguities in solar metallicity. In addition, the potential of the future SNO+ and LENA experiments for high-precision solar neutrino spectroscopy will be outlined.

  9. Fabrication and Characterization of Organic Solar Cells

    E-Print Network [OSTI]

    Yengel, Emre

    2010-01-01T23:59:59.000Z

    Solar Energy Materials and Solar Cells. 2005;86(2):197-205.in LEDs [18-20] and solar cells [ 20, 21]. What makes thesesolar cells, hybrid solar cells and dye-sensitized solar

  10. Sandia National Laboratories: National Solar Thermal Test Facility

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

    Solar Power, Energy, Facilities, Materials Science, National Solar Thermal Test Facility, News, News & Events, Renewable Energy, Solar, Solar Newsletter, Systems...

  11. Vertical profiles of radar reflectivity of convective cells in tropical and mid-latitude mesoscale convective systems

    E-Print Network [OSTI]

    Lutz, Kurt Reed

    1992-01-01T23:59:59.000Z

    meteorological phenomenon of particular interest to forecasters is the mesoscale convective system (MCS). Chappell (1986) defines an MCS as "any multicellular storm or group of interacting storms that suggests some organization in its forcing". An MCS...VERTICAL PROFILES OF RADAR REFLECTIVITY OF CONVECTIVE CELLS IN TROPICAL AND MID-LATITUDE MESOSCALE CONVECTIVE SYSTEMS A Thesis by KURT REED LUTZ Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  12. An analysis of modified convective available potential energy and Richardson number in mid-latitude squall line environments

    E-Print Network [OSTI]

    Stricherz, James Nicholas

    1989-01-01T23:59:59.000Z

    modified convective available potential energy (MCAPE) and Richardson number (MRI) were computed for each upper air sounding in a synoptic ? scale data network. The resulting fields were contoured and compared to the development, growth and decay of mid... ? latitude squall lines in several cases studies. The results indicate that, though the squall lines remained in the vicinity of MCAPE maxima and MRI minima there was no quantitative association. The squall lines also appeared to avoid these regions...

  13. Realistic analytic model for the prompt and high latitude emission in GRBs

    E-Print Network [OSTI]

    F. Genet; J. Granot

    2009-07-15T23:59:59.000Z

    Most gamma-ray bursts (GRBs) observed by the Swift satellite show an early rapid decay phase (RDP) in their X-ray lightcurve, which is usually a smooth continuation of the prompt gamma-ray emission, strongly suggesting that it is its tail. However, the mechanism behind it is still not clear. The most popular model for this RDP is High Latitude Emission (HLE). While HLE is expected in many models for the prompt GRB emission, such as the popular internal shocks model, there are models in which it is not expected, such as sporadic magnetic reconnection events. Therefore, testing whether the RDP is consistent with HLE can help distinguish between different prompt emission models. We address this question by modeling the prompt emission as the sum of its individual pulses with their HLE tails. Analytic expressions for the observed flux density are obtained for power-law and Band function emission spectra. For internal shocks the observed instantaneous spectrum is very close to the emitted one, and should be well described by a Band function also during the RDP. Our model naturally produces, the observed spectral softening and steepening of the flux decay. The observed flux during the RDP is initially dominated by the tail of the last pulse, but the tails of one or more earlier pulses can become dominant later on. Moreover, modeling several overlapping pulses as a single wider pulse would over-predict the emission tail. Thus, one should be very careful when testing the predictions of HLE and do a combined temporal and spectral fit of the prompt GRB emission and the RDP.

  14. Petrovay: Solar physics Chromosphere and corona THE SOLAR CHROMOSPHERE

    E-Print Network [OSTI]

    Petrovay, Kristf

    Petrovay: Solar physics Chromosphere and corona THE SOLAR CHROMOSPHERE Visible in eclipses as red brightness temperature at 10.7 cm: Tb 10 000 K. #12;Petrovay: Solar physics Chromosphere and corona Mean temperature profile: VAL model atmosphere, based on lines #12;Petrovay: Solar physics Chromosphere and corona

  15. SOLAR PHYSICS AND TERRESTRIAL EFFECTS Solar-Terrestrial Interactions

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    SOLAR PHYSICS AND TERRESTRIAL EFFECTS Chapter 4 Chapter 4 Solar-Terrestrial Interactions from the charged particles that reach the planet steadily as part of the solar wind and the much it will be deflected into a circular or spiral path by the Lorentz Force. Most charged particles in the solar wind

  16. Solar Energy Materials & Solar Cells 90 (2006) 664677 Invited article

    E-Print Network [OSTI]

    Romeo, Alessandro

    2006-01-01T23:59:59.000Z

    Solar Energy Materials & Solar Cells 90 (2006) 664677 Invited article Recent developments in evaporated CdTe solar cells G. Khrypunova , A. Romeob , F. Kurdesauc , D.L. Ba tznerd , H. Zogge , A Abstract Recent developments in the technology of high vacuum evaporated CdTe solar cells are reviewed

  17. Solar energy at Forest Research Solar Power at Alice Holt

    E-Print Network [OSTI]

    Solar energy at Forest Research Solar Power at Alice Holt research station provides a renewable to install a solar photovoltaic system to meet some of the research station's energy needs. #12;In January dioxide emissions, when compared with traditional forms of energy generation. · The solar installation

  18. SOLAR IRRADIANCE FORECASTING FOR THE MANAGEMENT OF SOLAR ENERGY SYSTEMS

    E-Print Network [OSTI]

    Heinemann, Detlev

    SOLAR IRRADIANCE FORECASTING FOR THE MANAGEMENT OF SOLAR ENERGY SYSTEMS Detlev Heinemann Oldenburg.girodo@uni-oldenburg.de ABSTRACT Solar energy is expected to contribute major shares of the future global energy supply. Due to its and solar energy conversion processes has to account for this behaviour in respective operating strategies

  19. Solar Works! In Seattle: Introduction to Solar Electric (PV)

    Broader source: Energy.gov [DOE]

    Presentation slides from residential PV workshop. Also covers general solar resource assessment, siting and financial incentives.

  20. Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller

    E-Print Network [OSTI]

    Poiry, Heather Marie

    2011-01-01T23:59:59.000Z

    Based Performance Analysis of a Solar Absorption Cooling andExperimental Investigation of a Solar Adsorption ChillerKreith, Jan F. Kreider. "Solar Cooling." Principles of Solar

  1. Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical...

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

    Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Print Wednesday,...

  2. Ozark Mountain solar home

    SciTech Connect (OSTI)

    Miller, B.

    1998-03-01T23:59:59.000Z

    If seeing is believing, Kyle and Christine Sarratt are believers. The couple has been living in their passive solar custom home for almost two years, long enough to see a steady stream of eye-opening utility bills and to experience the quality and comfort of energy-efficient design. Skeptical of solar homes at first, the Sarratts found an energy-conscious designer that showed them how they could realize their home-building dreams and live in greater comfort while spending less money. As Kyle says, {open_quotes}We knew almost nothing about solar design and weren`t looking for it, but when we realized we could get everything we wanted in a home and more, we were sold.{close_quotes} Now the couple is enjoying the great feeling of solar and wood heat in the winter, natural cooling in the summer and heating/cooling bills that average less than $20/month. The Sarratts` home overlooks a large lake near the town of Rogers, tucked up in the northwest corner of Arkansas. It is one of three completed homes out of 29 planned for the South Sun Estates subdivision, where homes are required by covenant to incorporate passive solar design principles. Orlo Stitt, owner of Stitt Energy Systems and developer of the subdivision, has been designing passive solar, energy-efficient homes for twenty years. His passive solar custom home development is the first in Arkansas.

  3. NREL Solar Radiation Research Laboratory (SRRL): Baseline Measurement System (BMS); Golden, Colorado (Data)

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

    Stoffel, T.; Andreas, A.

    The SRRL was established at the Solar Energy Research Institute (now NREL) in 1981 to provide continuous measurements of the solar resources, outdoor calibrations of pyranometers and pyrheliometers, and to characterize commercially available instrumentation. The SRRL is an outdoor laboratory located on South Table Mountain, a mesa providing excellent solar access throughout the year, overlooking Denver. Beginning with the basic measurements of global horizontal irradiance, direct normal irradiance and diffuse horizontal irradiance at 5-minute intervals, the SRRL Baseline Measurement System now produces more than 130 data elements at 1-min intervals that are available from the Measurement & Instrumentation Data Center Web site. Data sources include global horizontal, direct normal, diffuse horizontal (from shadowband and tracking disk), global on tilted surfaces, reflected solar irradiance, ultraviolet, infrared (upwelling and downwelling), photometric and spectral radiometers, sky imagery, and surface meteorological conditions (temperature, relative humidity, barometric pressure, precipitation, snow cover, wind speed and direction at multiple levels). Data quality control and assessment include daily instrument maintenance (M-F) with automated data quality control based on real-time examinations of redundant instrumentation and internal consistency checks using NREL's SERI-QC methodology. Operators are notified of equipment problems by automatic e-mail messages generated by the data acquisition and processing system. Radiometers are recalibrated at least annually with reference instruments traceable to the World Radiometric Reference (WRR).

  4. Solar Power in the Desert: Are the current large-scale solar developments really improving Californias environment?

    E-Print Network [OSTI]

    Allen, Michael F.; McHughen, Alan

    2011-01-01T23:59:59.000Z

    expectancy of a thermal solar energy development? A commontowards solar energy: Photovoltaic vs Solar Thermal. In:

  5. Solar Thermal Conversion

    SciTech Connect (OSTI)

    Kreith, F.; Meyer, R. T.

    1982-11-01T23:59:59.000Z

    The thermal conversion process of solar energy is based on well-known phenomena of heat transfer (Kreith 1976). In all thermal conversion processes, solar radiation is absorbed at the surface of a receiver, which contains or is in contact with flow passages through which a working fluid passes. As the receiver heats up, heat is transferred to the working fluid which may be air, water, oil, or a molten salt. The upper temperature that can be achieved in solar thermal conversion depends on the insolation, the degree to which the sunlight is concentrated, and the measures taken to reduce heat losses from the working fluid.

  6. Scattering Solar Thermal Concentrators

    Broader source: Energy.gov [DOE]

    "This fact sheet describes a scattering solar thermal concentrators project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D award program. The team, led by the Pennsylvania State University, is working to demonstrate a new, scattering-based approach to concentrating sunlight that aims to improve the overall performance and reliability of the collector field. The research team aims to show that scattering solar thermal collectors are capable of achieving optical performance equal to state-of-the-art parabolic trough systems, but with the added benefits of immunity to wind-load tracking error, more efficient land use, and utilization of stationary receivers."

  7. Solar Policy Environment: Madison

    Broader source: Energy.gov [DOE]

    The City of Madisons Solar America Cities project, MadiSUN, will coordinate and galvanize substantial local and state resources to showcase how a U.S. Midwest city can dramatically increase the use of solar energy. Madisons approach includes a comprehensive review of zoning and land use planning, streamlining the permitting processes, development of the local workforce, and assessment of city-owned buildings for solar PV and thermal applications. The City of Madison objective is to make Madison a green capital city and a national leader in energy efficiency and renewable energy.

  8. Thermal Management of Solar Cells

    E-Print Network [OSTI]

    Saadah, Mohammed Ahmed

    2013-01-01T23:59:59.000Z

    cells by cooling and concentration techniques," inheat. Different techniques of cooling solar cells have been

  9. Solar for Mining Hugh Rudnick

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Catlica de Chile)

    Solar for Mining Hugh Rudnick Professor Pontificia Universidad Catlica de Chile #12;Solar Energy in Mining Solar energy is becoming affordable Attractive potential use for mining purposes Must solve the storage requirement to increase its participation worldwide #12;Solar Energy in Mining Electrical Energy

  10. Solar Flares and particle acceleration

    E-Print Network [OSTI]

    of Glasgow, UK STFC Summer School, Armagh, 2012 #12;Solar flares: basics X-raysradiowavesParticles1AU Figure energy ~2 1032 ergs #12;"Standard" model of a solar flare/CME Solar corona T ~ 106 K => 0.1 keV per MeV Proton energies >100 MeV Large solar flare releases about 1032 ergs (about half energy

  11. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    solar facilities. Development of these facilities requires the long-term procurement of the power output.

  12. See-through amorphous silicon solar cells with selectively transparent and conducting photonic crystal back reflectors for building integrated photovoltaics

    SciTech Connect (OSTI)

    Yang, Yang [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada)] [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada); OBrien, Paul G. [Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada) [Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada); Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada); Ozin, Geoffrey A., E-mail: gozin@chem.utoronto.ca, E-mail: kherani@ecf.utoronto.ca [Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada); Kherani, Nazir P., E-mail: gozin@chem.utoronto.ca, E-mail: kherani@ecf.utoronto.ca [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada); Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada)

    2013-11-25T23:59:59.000Z

    Thin semi-transparent hydrogenated amorphous silicon (a-Si:H) solar cells with selectively transparent and conducting photonic crystal (STCPC) back-reflectors are demonstrated. Short circuit current density of a 135?nm thick a-Si:H cell with a given STCPC back-reflector is enhanced by as much as 23% in comparison to a reference cell with an ITO film functioning as its rear contact. Concurrently, solar irradiance of 295?W/m{sup 2} and illuminance of 3480 lux are transmitted through the cell with a given STCPC back reflector under AM1.5 Global tilt illumination, indicating its utility as a source of space heating and lighting, respectively, in building integrated photovoltaic applications.

  13. Solar Installation Labor Market Analysis

    SciTech Connect (OSTI)

    Friedman, B.; Jordan, P.; Carrese, J.

    2011-12-01T23:59:59.000Z

    The potential economic benefits of the growing renewable energy sector have led to increased federal, state, and local investments in solar industries, including federal grants for expanded workforce training for U.S. solar installers. However, there remain gaps in the data required to understand the size and composition of the workforce needed to meet the demand for solar power. Through primary research on the U.S. solar installation employer base, this report seeks to address that gap, improving policymakers and other solar stakeholders understanding of both the evolving needs of these employers and the economic opportunity associated with solar market development. Included are labor market data covering current U.S. employment, expected industry growth, and employer skill preferences for solar installation-related occupations. This study offers an in-depth look at the solar installation sectors. A study published by the Solar Foundation in October 2011 provides a census of labor data across the entire solar value chain.

  14. Methane Fluxes Between Terrestrial Ecosystems and the Atmosphere at Northern High Latitudes During the Past Century: A retrospective analysis with a process-based biogeochemistry model

    E-Print Network [OSTI]

    Zhuang, Qianlai.

    We develop and use a new version of the Terrestrial Ecosystem Model (TEM) to study how rates of methane (CH4) emissions and consumption in high-latitude soils of the Northern Hemisphere have changed over the past century ...

  15. Sandia National Laboratories: solar

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

    reducing ... Solar Tower On September 26, 2012, in The tower is a 61 m (200 ft) high concrete structure with three test locations on the north side and the top of the tower....

  16. Energy 101: Solar PV

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses.

  17. LADWP- Solar Incentive Program

    Broader source: Energy.gov [DOE]

    '''''Note: LADWP reached its budget limit for non-residential solar incentive applications in Augugst 2012. Applicants who have not received a confirmation as of August 22, 2012, have had their...

  18. Solar Thermal Incentive Program

    Broader source: Energy.gov [DOE]

    The New York State Energy Research and Development Authority (NYSERDA) offers incentives for the installation of solar water heating systems to residential and non-residential customers of the...

  19. Argonne tackles solar energy

    ScienceCinema (OSTI)

    George Crabtree

    2010-09-01T23:59:59.000Z

    At Argonne National Laboratory, scientists and engineers are working to improve the solar cell to allow us to capture more of the sun's energy. Read more: http://www.anl.gov/Media_Center/News/...

  20. Atrium House solar revitalization

    E-Print Network [OSTI]

    Malamuceanu, Dan Roland

    1984-01-01T23:59:59.000Z

    The idea behind the Atrium House Solar Revitalization project, may be briefly presented as: energy conserving, low rise, high density, related- to- the-sky residences. The proposed system consists of a reticulate grid - ...