Sample records for task lighting parabolic

  1. Nexant Parabolic Trough Solar Power Plant Systems Analysis; Task 3: Multiple Plants at a Common Location, 20 January 2005 - 31 December 2005

    SciTech Connect (OSTI)

    Kelly, B.

    2006-07-01T23:59:59.000Z

    Subcontract report by Nexant, Inc., regarding a system analysis of multiple solar parabolic trough plants at a common location.

  2. The Effect of Personal Lighting Controls on Energy use and Occuplant Weel-Being in Offices

    E-Print Network [OSTI]

    Veitch, J. A.; Newsham, G. R.; Mancini, S.; Arsenault, C.

    2013-01-01T23:59:59.000Z

    The effect of personal lighting controls on d t ll b i i ffi Jennifer A Veitch Guy R Newsham energy use an occupan we - e ng n o ces . , . , Sandra Mancini, Chantal Arsenault Building the Evidence ? Highly-controlled laboratory studies 15...?yrs m ? Quasi-realistic laboratory study a l i s m R e a ? Field study Prior NRC Research ? First laboratory experiment Direct parabolic (ceiling perimeter) Direct parabolic (ceiling centre) Task light (undershelf) Indirect...

  3. LED Surgical Task Lighting Scoping Study: A Hospital Energy Alliance Project

    SciTech Connect (OSTI)

    Tuenge, Jason R.

    2011-01-17T23:59:59.000Z

    Tungsten-halogen (halogen) lamps have traditionally been used to light surgical tasks in hospitals, even though they are in many respects ill-suited to the application due to the large percentage of radiant energy outside the visible spectrum and issues with color rendering/quality. Light-emitting diode (LED) technology offers potential for adjustable color and improved color rendition/quality, while simultaneously reducing side-effects from non-visible radiant energy. It also has the potential for significant energy savings, although this is a fairly narrow application in the larger commercial building energy use sector. Based on analysis of available products and Hospital Energy Alliance member interest, it is recommended that a product specification and field measurement procedure be developed for implementation in demonstration projects.

  4. Task lights, commonly used in offices, homes, and dormitories, often use

    E-Print Network [OSTI]

    and posing difficulties in focusing the light. Light-emitting diode (LED) lighting, a fairly new solid

  5. Session: Parabolic Troughs (Presentation)

    SciTech Connect (OSTI)

    Kutscher, C.

    2008-04-01T23:59:59.000Z

    The project description is R and D activities at NREL and Sandia aimed at lowering the delivered energy cost of parabolic trough collector systems and FOA awards to support industry in trought development. The primary objectives are: (1) support development of near-term parabolic trought technology for central station power generation; (2) support development of next-generation trought fields; and (3) support expansion of US trough industry. The major FY08 activities were: (1) improving reflector optics; (2) reducing receiver heat loss (including improved receiver coating and mitigating hydrogen accumulation); (3) measuring collector optical efficiency; (4) optimizing plant performance and reducing cost; (5) reducing plant water consumption; and (6) directly supporting industry needs, including FOA support.

  6. Federal technology alert. Parabolic-trough solar water heating

    SciTech Connect (OSTI)

    NONE

    1998-04-01T23:59:59.000Z

    Parabolic-trough solar water heating is a well-proven renewable energy technology with considerable potential for application at Federal facilities. For the US, parabolic-trough water-heating systems are most cost effective in the Southwest where direct solar radiation is high. Jails, hospitals, barracks, and other facilities that consistently use large volumes of hot water are particularly good candidates, as are facilities with central plants for district heating. As with any renewable energy or energy efficiency technology requiring significant initial capital investment, the primary condition that will make a parabolic-trough system economically viable is if it is replacing expensive conventional water heating. In combination with absorption cooling systems, parabolic-trough collectors can also be used for air-conditioning. Industrial Solar Technology (IST) of Golden, Colorado, is the sole current manufacturer of parabolic-trough solar water heating systems. IST has an Indefinite Delivery/Indefinite Quantity (IDIQ) contract with the Federal Energy Management Program (FEMP) of the US Department of Energy (DOE) to finance and install parabolic-trough solar water heating on an Energy Savings Performance Contract (ESPC) basis for any Federal facility that requests it and for which it proves viable. For an ESPC project, the facility does not pay for design, capital equipment, or installation. Instead, it pays only for guaranteed energy savings. Preparing and implementing delivery or task orders against the IDIQ is much simpler than the standard procurement process. This Federal Technology Alert (FTA) of the New Technology Demonstration Program is one of a series of guides to renewable energy and new energy-efficient technologies.

  7. Global Assessment of Hydrogen Technologies - Task 1 Report Technology Evaluation of Hydrogen Light Duty Vehicles

    SciTech Connect (OSTI)

    Fouad, Fouad H.; Peters, Robert W.; Sisiopiku, Virginia P.; Sullivan Andrew J.; Rousseau, Aymeric

    2007-12-01T23:59:59.000Z

    This task analyzes the candidate hydrogen-fueled vehicles for near-term use in the Southeastern U.S. The purpose of this work is to assess their potential in terms of efficiency and performance. This report compares conventional, hybrid electric vehicles (HEV) with gasoline and hydrogen-fueled internal combustion engines (ICEs) as well as fuel cell and fuel cell hybrids from a technology as well as fuel economy point of view. All the vehicles have been simulated using the Powertrain System Analysis Toolkit (PSAT). First, some background information is provided on recent American automotive market trends and consequences. Moreover, available options are presented for introducing cleaner and more economical vehicles in the market in the future. In this study, analysis of various candidate hydrogen-fueled vehicles is performed using PSAT and, thus, a brief description of PSAT features and capabilities are provided. Detailed information on the simulation analysis performed is also offered, including methodology assumptions, fuel economic results, and conclusions from the findings.

  8. PARABOLIC OBSTACLE PROBLEMS APPLIED TO FINANCE A ...

    E-Print Network [OSTI]

    2006-03-07T23:59:59.000Z

    1. Introduction. 1.1. Background. The parabolic obstacle problem refers to finding the smallest supper-solution (for a given parabolic ... H. Shahgholian is supported by Swedish Research Council. 1 ...... MR MR2052937 (2005d:35276). [BD97].

  9. Shenandoah parabolic dish solar collector

    SciTech Connect (OSTI)

    Kinoshita, G.S.

    1985-01-01T23:59:59.000Z

    The objectives of the Shenandoah, Georgia, Solar Total Energy System are to design, construct, test, and operate a solar energy system to obtain experience with large-scale hardware systems for future applications. This report describes the initial design and testing activities conducted to select and develop a collector that would serve the need of such a solar total energy system. The parabolic dish was selected as the collector most likely to maximize energy collection as required by this specific site. The fabrication, testing, and installation of the parabolic dish collector incorporating improvements identified during the development testing phase are described.

  10. Parabolic Trough | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2:Introduction toManagementOPAM5Parabolic Trough Parabolic Trough DOE funds solar research

  11. Plane and parabolic solar panels

    E-Print Network [OSTI]

    J. H. O. Sales; A. T. Suzuki

    2009-05-14T23:59:59.000Z

    We present a plane and parabolic collector that absorbs radiant energy and transforms it in heat. Therefore we have a panel to heat water. We study how to increment this capture of solar beams onto the panel in order to increase its efficiency in heating water.

  12. Plane and parabolic solar panels

    E-Print Network [OSTI]

    Sales, J H O

    2009-01-01T23:59:59.000Z

    We present a plane and parabolic collector that absorbs radiant energy and transforms it in heat. Therefore we have a panel to heat water. We study how to increment this capture of solar beams onto the panel in order to increase its efficiency in heating water.

  13. Power converters for parabolic dishes

    SciTech Connect (OSTI)

    Truscello, V.C.; Williams, A.N.

    1981-01-01T23:59:59.000Z

    The development status of receivers and power conversion units to be used with parabolic dish concentrators is presented. Applications are identified, and the key role played by the power converter element of the collector module is emphasized. The electrical output of the 11-meter-diameter dish modules which are being developed varies up to a maximum of about 25 kilowatts, depending on the thermodynamic cycle of the power converter. Three power conversion units are being developed: an organic Rankine, an air Brayton, and a Stirling. The development program for the receivers and the power conversion units is described in detail.

  14. Development of an Advanced, Low-Cost parabolic Trough Collector...

    Office of Environmental Management (EM)

    Development of an Advanced, Low-Cost parabolic Trough Collector for Baseload Operation Development of an Advanced, Low-Cost parabolic Trough Collector for Baseload Operation This...

  15. Coupled Parabolic Equations for Wave Propagation

    E-Print Network [OSTI]

    Zhao, Hongkai

    Coupled Parabolic Equations for Wave Propagation Kai Huang, Knut Solna and Hongkai Zhao #3; April simulation of wave propagation over long distances. The coupled parabolic equations are derived from a two algorithms are important in order to understand wave propagation in complex media. Resolving the wavelength

  16. Parabolic curves in Lie groups

    SciTech Connect (OSTI)

    Pauley, Michael [School of Mathematics and Statistics, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009 (Australia)

    2010-05-15T23:59:59.000Z

    To interpolate a sequence of points in Euclidean space, parabolic splines can be used. These are curves which are piecewise quadratic. To interpolate between points in a (semi-)Riemannian manifold, we could look for curves such that the second covariant derivative of the velocity is zero. We call such curves Jupp and Kent quadratics or JK-quadratics because they are a special case of the cubic curves advocated by Jupp and Kent. When the manifold is a Lie group with bi-invariant metric, we can relate JK-quadratics to null Lie quadratics which arise from another interpolation problem. We solve JK-quadratics in the Lie groups SO(3) and SO(1,2) and in the sphere and hyperbolic plane, by relating them to the differential equation for a quantum harmonic oscillator00.

  17. Sustainable Office Lighting Options

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Sustainable Office Lighting Options Task Lighting: Task lighting is a localized method of lighting a workspace so that additional, unnecessary lighting is eliminated, decreasing energy usage and costs. Illumination levels in the targeted work areas are higher with task lighting than with the ambient levels

  18. LIGHTING CONTROLS: SURVEY OF MARKET POTENTIAL

    E-Print Network [OSTI]

    Verderber, R.R.

    2010-01-01T23:59:59.000Z

    REFERENCES Task Report to Lighting Systems Research,Berkeley Laboratory, "Lighting Control System Market1980). Task Report to Lighting Systems Research, Lawrence

  19. A Linear Parabolic Trough Solar Collector Performance Model

    E-Print Network [OSTI]

    Qu, M.; Archer, D.; Masson, S.

    2006-01-01T23:59:59.000Z

    A performance model has been programmed for solar thermal collector based on a linear, tracking parabolic trough reflector focused on a surface-treated metallic pipe receiver enclosed in an evacuated transparent tube: a Parabolic Trough Solar...

  20. Parabolic trough solar collectors : design for increasing efficiency

    E-Print Network [OSTI]

    Figueredo, Stacy L. (Stacy Lee), 1981-

    2011-01-01T23:59:59.000Z

    Parabolic trough collectors are a low cost implementation of concentrated solar power technology that focuses incident sunlight onto a tube filled with a heat transfer fluid. The efficiency and cost of the parabolic trough ...

  1. Boundary approximate controllability of some linear parabolic April 5, 2013

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Boundary approximate controllability of some linear parabolic systems April 5, 2013 Guillaume Olive controllability of two classes of linear parabolic systems, namely a system of n heat equations coupled through are the only ones concerning the boundary controllability of linear parabolic systems of heat-type. For more

  2. A new parabolic trough solar collector P. Kohlenbach1

    E-Print Network [OSTI]

    A new parabolic trough solar collector P. Kohlenbach1 , S. McEvoy1 , W. Stein1 , A. Burton1 , K) power generation system. The parabolic trough collectors have been installed in the National Solar and power generation (CHP), CSIRO has built a solar thermal parabolic trough collector field which

  3. Task Cover

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

    NAME NO. OF PAGES(S) Sample Task Order 1 Site Support Services 14 Sample Task Order 2 Health Program Services 16 Sample Task Order 3 Janitorial Services (including Child 30...

  4. Optimal Heat Collection Element Shapes for Parabolic Trough Concentrators

    SciTech Connect (OSTI)

    Bennett, C

    2007-11-15T23:59:59.000Z

    For nearly 150 years, the cross section of the heat collection tubes used at the focus of parabolic trough solar concentrators has been circular. This type of tube is obviously simple and easily fabricated, but it is not optimal. It is shown in this article that the optimal shape, assuming a perfect parabolic figure for the concentrating mirror, is instead oblong, and is approximately given by a pair of facing parabolic segments.

  5. Advanced Low-Cost Recievers for Parabolic Troughs

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

    PROJECT OBJECTIVES KEY RESULTS AND OUTCOMES NEXT MILESTONES 1. Burkholder F, Kutscher C. Heat Loss Testing of Schott's 2008 PTR70 Parabolic Trough Receiver (NRELTP-550-45633):...

  6. Lighting

    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: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let us countLighting Sign In About | Careers |

  7. Alignment method for parabolic trough solar concentrators

    DOE Patents [OSTI]

    Diver, Richard B. (Albuquerque, NM)

    2010-02-23T23:59:59.000Z

    A Theoretical Overlay Photographic (TOP) alignment method uses the overlay of a theoretical projected image of a perfectly aligned concentrator on a photographic image of the concentrator to align the mirror facets of a parabolic trough solar concentrator. The alignment method is practical and straightforward, and inherently aligns the mirror facets to the receiver. When integrated with clinometer measurements for which gravity and mechanical drag effects have been accounted for and which are made in a manner and location consistent with the alignment method, all of the mirrors on a common drive can be aligned and optimized for any concentrator orientation.

  8. Nontracking parabolic solar energy collector apparatus

    SciTech Connect (OSTI)

    Gill, M. T.; Rogers, M. C.

    1985-12-31T23:59:59.000Z

    A mirror collector having a generally parabolic surface terminating near the vertex in a circular or cylindrical curve, an evacuated cylindrical heat entrapment tube compossed of a clear glass for energy admission and two pair of elongated heat collector tubes centrally located in the heat entrapment tube for passing an inner fluid to be heated. The two pair of heat collector tubes are constructed of copper with a selective absorption coating for receiving heat and positioned so that the mirror collector concentrates substantially all incoming energy upon the central heat collector tubes.

  9. Arnold Schwarzenegger LIGHTING RESEARCH PROGRAM

    E-Print Network [OSTI]

    Project Summaries ELEMENT 2: ADVANCE LIGHTING TECHNOLOGIES PROJECT 2.1 LIGHT EMITTING DIODE (LED light emitting diodes (LED) technology for general lighting applications by developing a task lamp

  10. Moments and Lyapunov exponents for the parabolic Anderson model

    E-Print Network [OSTI]

    Borodin, Alexei

    We study the parabolic Anderson model in (1+1) dimensions with nearest neighbor jumps and space–time white noise (discrete space/continuous time). We prove a contour integral formula for the second moment and compute the ...

  11. Project Profile: High-Concentration, Low-Cost Parabolic Trough...

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

    Profile: High-Concentration, Low-Cost Parabolic Trough System for Baseload CSP SkyFuel logo SkyFuel, under the Baseload CSP FOA, is developing an advanced, low-cost CSP collector...

  12. Modeling of a Parabolic Trough Solar Field for Acceptance Testing: A Case Study

    SciTech Connect (OSTI)

    Wagner, M. J.; Mehos, M. S.; Kearney, D. W.; McMahan, A. C.

    2011-01-01T23:59:59.000Z

    As deployment of parabolic trough concentrating solar power (CSP) systems ramps up, the need for reliable and robust performance acceptance test guidelines for the solar field is also amplified. Project owners and/or EPC contractors often require extensive solar field performance testing as part of the plant commissioning process in order to ensure that actual solar field performance satisfies both technical specifications and performance guaranties between the involved parties. Performance test code work is currently underway at the National Renewable Energy Laboratory (NREL) in collaboration with the SolarPACES Task-I activity, and within the ASME PTC-52 committee. One important aspect of acceptance testing is the selection of a robust technology performance model. NREL1 has developed a detailed parabolic trough performance model within the SAM software tool. This model is capable of predicting solar field, sub-system, and component performance. It has further been modified for this work to support calculation at subhourly time steps. This paper presents the methodology and results of a case study comparing actual performance data for a parabolic trough solar field to the predicted results using the modified SAM trough model. Due to data limitations, the methodology is applied to a single collector loop, though it applies to larger subfields and entire solar fields. Special consideration is provided for the model formulation, improvements to the model formulation based on comparison with the collected data, and uncertainty associated with the measured data. Additionally, this paper identifies modeling considerations that are of particular importance in the solar field acceptance testing process and uses the model to provide preliminary recommendations regarding acceptable steady-state testing conditions at the single-loop level.

  13. Integrated LED-based luminare for general lighting

    DOE Patents [OSTI]

    Dowling, Kevin J.; Lys, Ihor A.; Roberge, Brian; Williamson, Ryan C.; Roberts, Ron; Datta, Michael; Mollnow, Tomas; Morgan, Frederick M.

    2013-03-05T23:59:59.000Z

    Lighting apparatus and methods employing LED light sources are described. The LED light sources are integrated with other components in the form of a luminaire or other general purpose lighting structure. Some of the lighting structures are formed as Parabolic Aluminum Reflector (PAR) luminaires, allowing them to be inserted into conventional sockets. The lighting structures display beneficial operating characteristics, such as efficient operation, high thermal dissipation, high output, and good color mixing.

  14. Task Plans

    Office of Environmental Management (EM)

    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: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2Uranium Transferon the PassingRouting TECFinish LineTara Trujillo AboutTask

  15. Advanced Low-Cost Receivers for Parabolic Troughs

    Broader source: Energy.gov [DOE]

    This fact sheet describes an advanced, low-cost receiver project for parabolic troughs, awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D award program. Norwich Technologies is designing a novel receiver that addresses these issues for parabolic trough concentrating solar power systems. This technology represents significant operational and cost advances in the most trusted and broadly implemented form of CSP and provides a viable pathway to achieving SunShot’s $0.06/kWh goal for utility-scale CSP systems.

  16. Output Feedback Control of Parabolic PDE Systems with Input Constraints1

    E-Print Network [OSTI]

    Sontag, Eduardo

    the fast and slow eigenvalues of the spatial differential operator increases. Key words: Parabolic PDE by quasi-linear parabolic PDEs. Examples in- clude tubular reactors, packed-bed reactors, and chemical vapor deposition reactors. Parabolic PDE systems typi- cally involve spatial differential operators

  17. hal-00177601,version2-30Oct2007 A closed parabolic trough solar collector

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    hal-00177601,version2-30Oct2007 A closed parabolic trough solar collector Gang Xiao 30th October of closed-box parabolic trough concentrated solar collector. By accepting an optical loss of a few 2007 Parabolic trough[1] is the most mature technology for large scale exploitation of solar energy

  18. Global Assessment of Hydrogen Technologies - Task 2 Report Comparison of Performance and Emissions from Near-Term Hydrogen Fueled Light Duty Vehicles

    SciTech Connect (OSTI)

    Fouad, Fouad H.; Peters, Robert W.; Sisiopiku, Virginia P.; Sullivan Andrew J.; Ng, Henry K.; Waller, Thomas

    2007-12-01T23:59:59.000Z

    An investigation was conducted on the emissions and efficiency from hydrogen blended compressed natural gas (CNG) in light duty vehicles. The different blends used in this investigation were 0%, 15%, 30%, 50%, 80%, 95%, and ~100% hydrogen, the remainder being compressed natural gas. The blends were tested using a Ford F-150 and a Chevrolet Silverado truck supplied by Arizona Public Services. Tests on emissions were performed using four different driving condition tests. Previous investigation by Don Karner and James Frankfort on a similar Ford F-150 using a 30% hydrogen blend showed that there was substantial reduction when compared to gasoline in carbon monoxide (CO), nitrogen oxide (NOx), and carbon dioxide (CO2) emissions while the reduction in hydrocarbon (HC) emissions was minimal. This investigation was performed using different blends of CNG and hydrogen to evaluate the emissions reducing capabilities associated with the use of the different fuel blends. The results were then tested statistically to confirm or reject the hypotheses on the emission reduction capabilities. Statistically analysis was performed on the test results to determine whether hydrogen concentration in the HCNG had any effect on the emissions and the fuel efficiency. It was found that emissions from hydrogen blended compressed natural gas were a function of driving condition employed. Emissions were found to be dependent on the concentration of hydrogen in the compressed natural gas fuel blend.

  19. Large deviation theory and applications Application I: The parabolic Anderson

    E-Print Network [OSTI]

    of independent, identically distributed random variables. We denote by · the expectation with respect, it is believed that there is a small number of relevant island where the potential takes especially large values, the parabolic Anderson model is intermittent. Throughout, we will assume that the logarithmic moment generating

  20. Long-term average performance benefits of parabolic trough improvements

    SciTech Connect (OSTI)

    Gee, R.; Gaul, H.W.; Kearney, D.; Rabl, A.

    1980-03-01T23:59:59.000Z

    Improved parabolic trough concentrating collectors will result from better design, improved fabrication techniques, and the development and utilization of improved materials. The difficulty of achieving these improvements varies as does their potential for increasing parabolic trough performance. The purpose of this analysis is to quantify the relative merit of various technology advancements in improving the long-term average performance of parabolic trough concentrating collectors. The performance benefits of improvements are determined as a function of operating temperature for north-south, east-west, and polar mounted parabolic troughs. The results are presented graphically to allow a quick determination of the performance merits of particular improvements. Substantial annual energy gains are shown to be attainable. Of the improvements evaluated, the development of stable back-silvered glass reflective surfaces offers the largest performance gain for operating temperatures below 150/sup 0/C. Above 150/sup 0/C, the development of trough receivers that can maintain a vacuum is the most significant potential improvement. The reduction of concentrator slope errors also has a substantial performance benefit at high operating temperatures.

  1. Compound parabolic concentrator with cavity for tubular absorbers

    DOE Patents [OSTI]

    Winston, Roland (5217C S. University Ave., Chicago, IL 60615)

    1983-01-01T23:59:59.000Z

    A compond parabolic concentrator with a V-shaped cavity is provided in which an optical receiver is emplaced. The cavity redirects all energy entering between the receiver and the cavity structure onto the receiver, if the optical receiver is emplaced a distance from the cavity not greater than 0.27 r (where r is the radius of the receiver).

  2. Parabolic Trough Solar Power for Competitive U.S. Markets

    SciTech Connect (OSTI)

    Henry W. Price

    1998-11-01T23:59:59.000Z

    Nine parabolic trough power plants located in the California Mojave Desert represent the only commercial development of large-scale solar power plants to date. Although all nine plants continue to operate today, no new solar power plants have been completed since 1990. Over the last several years, the parabolic trough industry has focused much of its efforts on international market opportunities. Although the power market in developing countries appears to offer a number of opportunities for parabolic trough technologies due to high growth and the availability of special financial incentives for renewables, these markets are also plagued with many difficulties for developers. In recent years, there has been some renewed interest in the U.S. domestic power market as a result of an emerging green market and green pricing incentives. Unfortunately, many of these market opportunities and incentives focus on smaller, more modular technologies (such as photovoltaics or wind power), and as a result they tend to exclude or are of minimum long-term benefit to large-scale concentrating solar power technologies. This paper looks at what is necessary for large-scale parabolic trough solar power plants to compete with state-of-the-art fossil power technology in a competitive U.S. power market.

  3. Dynamical constants of structured photons with parabolic-cylindrical symmetry

    E-Print Network [OSTI]

    B. M. Rodriguez-Lara; R. Jauregui

    2009-05-20T23:59:59.000Z

    Electromagnetic modes with parabolic-cylindrical symmetry and their dynamical variables are studied both in the classical and quantum realm. As a result, a new dynamical constant for the electromagnetic field is identified and linked to the symmetry operator which supports it.

  4. How Do You Light Your Home Efficiently? | Department of Energy

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

    using task lighting, flipping the switch, and taking advantage of natural daylight can all help you save on your lighting costs. How do you light your home efficiently?...

  5. Performance contracting for parabolic trough solar thermal systems

    SciTech Connect (OSTI)

    Brown, H.; Hewett, R.; Walker, A. [National Renewable Energy Lab., Golden, CO (United States); Gee, R.; May, K. [Industrial Solar Technology, Golden, CO (United States)

    1997-12-31T23:59:59.000Z

    Several applications of solar energy have proven viable in the energy marketplace, due to competitive technology and economic performance. One example is the parabolic trough solar collectors, which use focused solar energy to maximize efficiency and reduce material use in construction. Technical improvements are complemented by new business practices to make parabolic trough solar thermal systems technically and economically viable in an ever widening range of applications. Technical developments in materials and fabrication techniques reduce production cost and expand applications from swimming pool heating and service hot water, to higher-temperature applications such as absorption cooling and process steam. Simultaneously, new financing mechanisms such as a recently awarded US Department of Energy (DOE) Federal Energy Management Program (FEMP) indefinite quantity Energy Savings Performance Contract (Super ESPC) facilitate and streamline implementation of the technology in federal facilities such as prisons and military bases.

  6. Method of manufacturing a glass parabolic-cylindrical solar collector

    SciTech Connect (OSTI)

    Deminet, C.

    1980-12-09T23:59:59.000Z

    The method includes the following steps: (1) a microsheet of glass is drawn from a glass melt; (2) a reflective layer, such as silver, is deposited on one surface of the microsheet; (3) a first flexible backing layer, such as fiberglass, is bonded to the reflective layer; (4) the combination of the microsheet with the reflective layer and the first backing layer is formed over a mandrel which is preferably in the form of a parabolic cylinder; and (5) a honeycombed layer, with a second fiberglass backing layer, is then bonded to the first backing layer. The product produced by the steps 1-5 is then cured so that it retains the desired configuration; i.e. parabolic-cylindrical, after it is removed from the mandrel.

  7. Absorber Alignment Measurement Tool for Solar Parabolic Trough Collectors: Preprint

    SciTech Connect (OSTI)

    Stynes, J. K.; Ihas, B.

    2012-04-01T23:59:59.000Z

    As we pursue efforts to lower the capital and installation costs of parabolic trough solar collectors, it is essential to maintain high optical performance. While there are many optical tools available to measure the reflector slope errors of parabolic trough solar collectors, there are few tools to measure the absorber alignment. A new method is presented here to measure the absorber alignment in two dimensions to within 0.5 cm. The absorber alignment is measured using a digital camera and four photogrammetric targets. Physical contact with the receiver absorber or glass is not necessary. The alignment of the absorber is measured along its full length so that sagging of the absorber can be quantified with this technique. The resulting absorber alignment measurement provides critical information required to accurately determine the intercept factor of a collector.

  8. Gas Turbine/Solar Parabolic Trough Hybrid Designs: Preprint

    SciTech Connect (OSTI)

    Turchi, C. S.; Ma, Z.; Erbes, M.

    2011-03-01T23:59:59.000Z

    A strength of parabolic trough concentrating solar power (CSP) plants is the ability to provide reliable power by incorporating either thermal energy storage or backup heat from fossil fuels. Yet these benefits have not been fully realized because thermal energy storage remains expensive at trough operating temperatures and gas usage in CSP plants is less efficient than in dedicated combined cycle plants. For example, while a modern combined cycle plant can achieve an overall efficiency in excess of 55%; auxiliary heaters in a parabolic trough plant convert gas to electricity at below 40%. Thus, one can argue the more effective use of natural gas is in a combined cycle plant, not as backup to a CSP plant. Integrated solar combined cycle (ISCC) systems avoid this pitfall by injecting solar steam into the fossil power cycle; however, these designs are limited to about 10% total solar enhancement. Without reliable, cost-effective energy storage or backup power, renewable sources will struggle to achieve a high penetration in the electric grid. This paper describes a novel gas turbine / parabolic trough hybrid design that combines solar contribution of 57% and higher with gas heat rates that rival that for combined cycle natural gas plants. The design integrates proven solar and fossil technologies, thereby offering high reliability and low financial risk while promoting deployment of solar thermal power.

  9. Turbo-Charged Lighting Design

    E-Print Network [OSTI]

    Clark, W. H. II

    TURBO-CHARGED LIGHTING DESIGN William H. Clark II Design Engineer O'Connell Robertson & Assoc Austin/ Texas ABSTRACT The task of the lighting designer has become very complex, involving thousands of choices for fixture types and hundreds...

  10. Parabolic Trough Solar System Piping Model: Final Report, 13 May 2002 ? 31 December 2004

    SciTech Connect (OSTI)

    Kelly, B.; Kearney, D.

    2006-07-01T23:59:59.000Z

    Subcontract report by Nexant, Inc., and Kearny and Associates regarding a study of a piping model for a solar parabolic trough system.

  11. alxga1-xas parabolic quantum: Topics by E-print Network

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

    Marko Znidaric 2001-03-01 37 Dynamical constants of structured photons with parabolic-cylindrical symmetry Quantum Physics (arXiv) Summary: Electromagnetic modes with...

  12. Deformation of a thin, elastic plate to a deep parabolic cylinder

    SciTech Connect (OSTI)

    Reuter, R.C. Jr.; Wilson, R.K.

    1982-02-01T23:59:59.000Z

    Equations governing the elastic deformation of thin plates through large displacements to deep parabolic cylinders are presented and solved. The solution consists of expressions for a spatially distributed surface pressure and uniform rim loads which, when applied to the plate, produce the specified, deep parabolic cylindrical shape. These forming loads are written in dimensionless form for parabolic cylinders of arbitrary focal length and arbitrary rim to rim aperture. Numerical results are presented and limiting values are discussed. The solution and results find immediate application to mechanical forming and adhesive retention of parabolic solar collector components.

  13. Efficient directional spontaneous emission from an InGaAs/InP heterostructure with an integral parabolic reflector

    SciTech Connect (OSTI)

    Gfroerer, T.H.; Cornell, E.A. [JILA, National Institute of Standards and Technology and University of Colorado, and Department of Physics, University of Colorado, Boulder, Colorado, 80309-0440 (United States)] [JILA, National Institute of Standards and Technology and University of Colorado, and Department of Physics, University of Colorado, Boulder, Colorado, 80309-0440 (United States); Wanlass, M.W. [National Renewable Energy Laboratory, Golden, Colorado, 80401 (United States)] [National Renewable Energy Laboratory, Golden, Colorado, 80401 (United States)

    1998-11-01T23:59:59.000Z

    In order to increase the radiative efficiency and directivity of spontaneous emission from a lattice-matched InGaAs/InP heterostructure, we have polished the substrate into a parabolic reflector. We combine optical and thermal measurements to obtain the absolute external efficiency over a wide range of carrier densities. Using a simple model, the measurement is used to determine interface, radiative, and Auger recombination rates in the active material. At the optimal density, the quantum efficiency exceeds 60{percent} at room temperature. The divergence of the emitted light is less than 20{degree}. In fact, the beam profile is dominated by a 6{degree} wide lobe that can be swept across the field of emission by changing the excitation position. This suggests a way to create an all-electronic scanned light beam. {copyright} {ital 1998 American Institute of Physics.}

  14. Analytical model and performance data for a cylindrical parabolic collector

    SciTech Connect (OSTI)

    Ford, F.M.; Stewart, W.E. Jr.

    1980-01-01T23:59:59.000Z

    Concentrating solar collectors provide higher fluid temperatures than flat-plate, an important advantage in many applications. The parabolic cylinder is one of the most popular types of concentrating collectors because of its relatively simple construction and tracking configuration. A mathematical model was developed for one such collector in order to predict thermal efficiency as a function of solar insolation. An experiment was then devised in an attempt to verify this model. Discrepancies between predicted and observed values are discussed, and suggestions are made for improving the model and the experimental procedure.

  15. Flux Distribution of a Single-Axis Tracking Parabolic Trough Array with Photovoltaic Receiver

    E-Print Network [OSTI]

    . With single-axis tracking the incident solar rays are not in general perpendicular to the trough. NonFlux Distribution of a Single-Axis Tracking Parabolic Trough Array with Photovoltaic Receiver G 0200 Australia E-mail: gregory.burgess@anu.edu.au Abstract Single-axis tracking parabolic troughs

  16. IMPACT OF NEW LIGHTING TECHNOLOGIES ON OFFICE ERGONOMICS

    E-Print Network [OSTI]

    Li, Linjie

    2013-12-31T23:59:59.000Z

    /16 participated in this experiment. Subjects performed typing tasks and color matching tasks under each one of four test conditions. Subjective evaluation of lighting quality and task satisfaction were collected using a questionnaire. High Dynamic Range (HDR...

  17. The Problem Conventional office lighting typically consists of bright fluo-

    E-Print Network [OSTI]

    by delamping--result in lower power consump- tion. The PLS, which features light-emitting diode (LED lighting is reduced and three light-emitting diode (LED) task lights (two desk lamps and one undercabinet

  18. The Advantage of Highly Controlled Lighting for Offices and Commercial Buildings

    E-Print Network [OSTI]

    Rubinstein, Francis

    2010-01-01T23:59:59.000Z

    of Highly Controlled Lighting for Offices and Commercialefficient, customized lighting for open-office cubicles.s “ambient” and “task” lighting components, 2) occupancy

  19. Toward Evaluating Lighting Design Interface Paradigms for Novice Users

    E-Print Network [OSTI]

    is a complex and fundamental task in computer cinematography, involving adjustment of light pa- rameters cinematography. We choose to focus on this sim- plified lighting task since our focus is on users with no prior

  20. PARABOLIC TROUGH POWER FOR THE CALIFORNIA COMPETITIVE MARKET

    E-Print Network [OSTI]

    California is about to complete its third year of a deregulated competitive wholesale power market. During the first two years of the competitive market, power prices averaged between 2 and 3¢/kWh. During 2000, electric supply to California was constrained a number of times causing maximum the price of power to peak over 100¢/kWh, and the average price of power to quadruple. The power output from solar plants tends to coincide with the high power demand periods in California. This fact had been demonstrated by the solar electric generating stations (SEGS) located in the California Mojave Desert, which operate under specific contracts signed in the 1980’s and early 1990’s with the local utility. This paper, on the other hand, examines how new parabolic trough solar plants would have faired on the wholesale competitive power market during 1999 and 2000.

  1. Gravitational wave energy spectrum of a parabolic encounter

    E-Print Network [OSTI]

    Christopher P. L. Berry; Jonathan R. Gair

    2010-11-18T23:59:59.000Z

    We derive an analytic expression for the energy spectrum of gravitational waves from a parabolic Keplerian binary by taking the limit of the Peters and Matthews spectrum for eccentric orbits. This demonstrates that the location of the peak of the energy spectrum depends primarily on the orbital periapse rather than the eccentricity. We compare this weak-field result to strong-field calculations and find it is reasonably accurate (~10%) provided that the azimuthal and radial orbital frequencies do not differ by more than ~10%. For equatorial orbits in the Kerr spacetime, this corresponds to periapse radii of rp > 20M. These results can be used to model radiation bursts from compact objects on highly eccentric orbits about massive black holes in the local Universe, which could be detected by LISA.

  2. Fifth parabolic dish solar thermal power program annual review: proceedings

    SciTech Connect (OSTI)

    None

    1984-03-01T23:59:59.000Z

    The primary objective of the Review was to present the results of activities within the Parabolic Dish Technology and Module/Systems Development element of the Department of Energy's Solar Thermal Energy Systems Program. The Review consisted of nine technical sessions covering overall Project and Program aspects, Stirling and Brayton module development, concentrator and engine/receiver development, and associated hardware and test results to date; distributed systems operating experience; international dish development activities; and non-DOE-sponsored domestic dish activities. A panel discussion concerning business views of solar electric generation was held. These Proceedings contain the texts of presentations made at the Review, as submitted by their authors at the beginning of the Review; therefore, they may vary slightly from the actual presentations in the technical sessions.

  3. Test results, Industrial Solar Technology parabolic trough solar collector

    SciTech Connect (OSTI)

    Dudley, V.E. [EG and G MSI, Albuquerque, NM (United States); Evans, L.R.; Matthews, C.W. [Sandia National Labs., Albuquerque, NM (United States)

    1995-11-01T23:59:59.000Z

    Sandia National Laboratories and Industrial Solar Technology are cost-sharing development of advanced parabolic trough technology. As part of this effort, several configurations of an IST solar collector were tested to determine the collector efficiency and thermal losses with black chrome and black nickel receiver selective coatings, combined with aluminized film and silver film reflectors, using standard Pyrex{reg_sign} and anti-reflective coated Pyrex{reg_sign} glass receiver envelopes. The development effort has been successful, producing an advanced collector with 77% optical efficiency, using silver-film reflectors, a black nickel receiver coating, and a solgel anti-reflective glass receiver envelope. For each receiver configuration, performance equations were empirically derived relating collector efficiency and thermal losses to the operating temperature. Finally, equations were derived showing collector performance as a function of input insolation value, incident angle, and operating temperature.

  4. Mechanical development of the actuation system of a parabolic solar trough

    E-Print Network [OSTI]

    O'Rourke, Conor R. (Conor Rakis)

    2011-01-01T23:59:59.000Z

    This thesis documents my personal contribution to the engineering and design of an actuation system with the purpose of rotating a parabolic solar trough to track the sun throughout the day. The primary focus of the design ...

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

    SciTech Connect (OSTI)

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

    2008-05-01T23:59:59.000Z

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

  6. Slope Error Measurement Tool for Solar Parabolic Trough Collectors: Preprint

    SciTech Connect (OSTI)

    Stynes, J. K.; Ihas, B.

    2012-04-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL) has developed an optical measurement tool for parabolic solar collectors that measures the combined errors due to absorber misalignment and reflector slope error. The combined absorber alignment and reflector slope errors are measured using a digital camera to photograph the reflected image of the absorber in the collector. Previous work using the image of the reflection of the absorber finds the reflector slope errors from the reflection of the absorber and an independent measurement of the absorber location. The accuracy of the reflector slope error measurement is thus dependent on the accuracy of the absorber location measurement. By measuring the combined reflector-absorber errors, the uncertainty in the absorber location measurement is eliminated. The related performance merit, the intercept factor, depends on the combined effects of the absorber alignment and reflector slope errors. Measuring the combined effect provides a simpler measurement and a more accurate input to the intercept factor estimate. The minimal equipment and setup required for this measurement technique make it ideal for field measurements.

  7. Solar-parabolic dish-Stirling-engine-system module. Task 1: Topical report, market assessment/conceptual design

    SciTech Connect (OSTI)

    Not Available

    1982-11-30T23:59:59.000Z

    The major activities reported are: a market study to identify an early market for a dish-Stirling module and assess its commercial potential; preparation of a conceptual system and subsystem design to address this market; and preparation of an early sales implementation plan. A study of the reliability of protection from the effects of walk-off, wherein the sun's image leaves the receiver if the dish is not tracking, is appended, along with an optical analysis and structural analysis. Also appended are the relationship between PURPA and solar thermal energy development and electric utility pricing rationale. (LEW)

  8. Wind load design methods for ground-based heliostats and parabolic dish collectors

    SciTech Connect (OSTI)

    Peterka, J A; Derickson, R G [Colorado State Univ., Fort Collins, CO (United States). Fluid Dynamics and Diffusion Lab.

    1992-09-01T23:59:59.000Z

    The purpose of this design method is to define wind loads on flat heliostat and parabolic dish collectors in a simplified form. Wind loads are defined for both mean and peak loads accounting for the protective influence of upwind collectors, wind protective fences, or other wind-blockage elements. The method used to define wind loads was to generalize wind load data obtained during tests on model collectors, heliostats or parabolic dishes, placed in a modeled atmospheric wind in a boundary-layer wind-tunnel at Colorado State University. For both heliostats and parabolic dishes, loads are reported for solitary collectors and for collectors as elements of a field. All collectors were solid with negligible porosity; thus the effects of porosity in the collectors is not addressed.

  9. Concentration of diuse light at the thermodynamic limit with an aplanatic curved diractive element

    E-Print Network [OSTI]

    Friesem, Asher A.

    has many appli- cations including solar energy concentration [1±6], light collection for optical for small a. Thus, their use is limited to either highly diuse beams (large a) or as a secondary stage- centrators, in particular those that use simple parabolic mirrors [5], are simpler and more com- pact than

  10. SAM sees the light Andrei Tokovinin, Roberto Tighe, Patricio Schurter, Rolando Cantarutti, Nicole van der Bliek,

    E-Print Network [OSTI]

    Tokovinin, Andrei A.

    on the SOAR Adaptive Module, SAM, including some results of tests of the Natural Guide Star mode: image of SAM has been described in Refs. 7,10. A pair of off-axis parabolic mirrors re-images the focal planeSAM sees the light Andrei Tokovinin, Roberto Tighe, Patricio Schurter, Rolando Cantarutti, Nicole

  11. High Resolution Sharp Computational Methods for Elliptic and Parabolic Problems in Complex Geometries

    E-Print Network [OSTI]

    Fedkiw, Ron

    High Resolution Sharp Computational Methods for Elliptic and Parabolic Problems in Complex Geometries Frédéric Gibou Chohong Min Ron Fedkiw November 2, 2012 In honor of Stan Osher's 70th birthday of chemical species (see [48] and the references therein); they are also core building blocks in fields

  12. On the inverse transform of Laplace transforms that contain (products of) the parabolic cylinder function

    E-Print Network [OSTI]

    Dirk Veestraeten

    2015-05-21T23:59:59.000Z

    The Laplace transforms of the transition probability density and distribution functions for the Ornstein-Uhlenbeck process contain the product of two parabolic cylinder functions, namely D_{v}(x)D_{v}(y) and D_{v}(x)D_{v-1}(y), respectively. The inverse transforms of these products have as yet not been documented. However, the transition density and distribution functions can be obtained by alternatively applying Doob's transform to the Kolmogorov equation and casting the problem in terms of Brownian motion. Linking the resulting transition density and distribution functions to their Laplace transforms then specifies the inverse transforms to the aforementioned products of parabolic cylinder functions. These two results, the recurrence relation of the parabolic cylinder function and the properties of the Laplace transform then enable the calculation of inverse transforms also for countless other combinations in the orders of the parabolic cylinder functions such as D_{v}(x)D_{v-2}(y), D_{v+1}(x)D_{v-1}(y) and D_{v}(x)D_{v-3}(y).

  13. Phenomenological study of parabolic and spherical indentation of elastic-ideally plastic material

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Phenomenological study of parabolic and spherical indentation of elastic-ideally plastic material O ideally plastic materials was carried out by using precise results of finite elements calculations behaviour is found. Two elastic-plastic regimes and two plastic regimes are observed for materials of very

  14. Nuclear spin dynamics in parabolic quantum wells Ionel Tifrea* and Michael E. Flatte

    E-Print Network [OSTI]

    Flatte, Michael E.

    Nuclear spin dynamics in parabolic quantum wells Ionel T¸ifrea* and Michael E. Flatte´ Department March 2004 We present a detailed analytical and numerical analysis of the nuclear spin dynamics of the electronic wave function in small electric fields. The nuclear spin relaxation via the hyperfine interaction

  15. Hybrid Control of Parabolic PDE Systems Nael H. El-Farra and Panagiotis D. Christofides

    E-Print Network [OSTI]

    Sontag, Eduardo

    - tinguishing feature of distributed control problems is that they involve the regulation of distributed on the synthesis of nonlinear low-order controllers on the basis of ODE models obtained through combinationHybrid Control of Parabolic PDE Systems Nael H. El-Farra and Panagiotis D. Christofides Department

  16. Numerical schemes for a pseudo-parabolic Burgers equation: discontinuous data and long-time behaviour

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    . Here u denotes the water saturation. Equation (1.6) follows by combining Darcy's law, the massNumerical schemes for a pseudo-parabolic Burgers equation: discontinuous data and long Burgers'­type equation that is extended with a third-order term containing mixed derivatives in space

  17. Parabolic equation solution of seismo-acoustics problems involving variations in bathymetry and sediment thickness

    E-Print Network [OSTI]

    , Troy, New York 12180 Finn B. Jensen and Mario Zampolli NATO Undersea Research Center, 19126 La Spezia solutions. We also apply the approach to a model problem based on a complex environment off the New Jersey to outgoing and incoming energy. These factors give rise to the parabolic wave equations7 r ur w = ± i L-1 M 1

  18. Two parabolic equations for propagation in layered poro-elastic media

    E-Print Network [OSTI]

    Rensselaer Polytechnic Institute, Troy, New York 12180 Michael D. Collins Naval Research Laboratory, Stennis and efficient for ocean acoustic propagation when outgoing energy domi- nates backscattered.1 In many shallow new parabolic equation formulations are derived for layered poro-elastic media. An earlier formulation

  19. Simulation of the Kelvin-Helmholtz instability of a supersonic slip surface with the Piecewise-Parabolic method (PPM)

    SciTech Connect (OSTI)

    Woodward, P.R.

    1984-03-19T23:59:59.000Z

    The Piecewise-Parabolic Method (PPM) has been used to study the nonlinear development of the Kelvin-Helmholtz instability of a Mach 2 slip surface in both a gamma-law gas and in an isothermal gas. A simplified version of PPM appropriate to this and other problems with only weak shocks is described. The instability calculations demonstrate the usefulness of discontinuity steepening in PPM and they illustrate the complexity in a flow problem which this method can treat accurately on Cray-I-class computers. The simulations also bring to light characteristic combinations of nonlinear waves which arise from finite-amplitude perturbations of the slip surface and which exhibit an approximately self-similar growth. After passing through a fairly chaotic phase of development, the mixing layer generated by the instability achieves a relatively ordered state which does not appear to depend greatly upon the nature of the initial perturbation, but which does depend upon the length scale over which strict periodicity is enforced in the simulation.

  20. PROJECT TASK STATEMENT

    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's Possible for RenewableSpeedingBiomassPPPO Website Directory PPPO WebsitePREP |Dan5,PROJECT TASK

  1. Sandia Energy - IEA PVPS Task 13 Activities

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

    IEA PVPS Task 13 Activities Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Modeling & Analysis IEA PVPS Task 13 Activities IEA PVPS Task 13...

  2. Some modifications to the design of a parabolic solar concentrator for construction in Lesotho and their effects on power production

    E-Print Network [OSTI]

    Ferreira, Toni (Toni Jolene)

    2005-01-01T23:59:59.000Z

    An experimental study was performed to test the effectiveness of design modifications terms of efficiency and power production in an existing parabolic solar concentrator. The proposed modifications included limiting the ...

  3. Light Duty Utility Arm System hot test

    SciTech Connect (OSTI)

    Howden, G.F.; Conrad, R.B.; Kiebel, G.R.

    1996-02-01T23:59:59.000Z

    This Engineering Task Plan describes the scope of work and cost for implementing a hot test of the Light Duty Utility Arm System in Tank T-106 in September 1996.

  4. Near-term improvements in parabolic troughs: an economic and performance assessment

    SciTech Connect (OSTI)

    Gee, R.; Murphy, L.M.

    1981-08-01T23:59:59.000Z

    Improved parabolic-trough concentrating collectors will result from better design, improved fabrication techniques, and the development and utilization of improved materials. This analysis qualifies the performance potential of various parabolic-trough component improvements from a systems viewpoint and uses these performance data to determine the worth of each improvement on an economic basis. The improvements considered are evacuated receivers, silvered-glass reflectors, improved receiver, selective coatings, higher optical accuracy concentrations, and higher transmittance receiver glazings. Upper-bound costs for each improvement are provided as well as estimates of the increased solar system rates of return that are made possible by these improvements. The performance and economic potential of some of these improvements are shown to be substantial, especially at higher collector operating temperatures.

  5. Gas Turbine/Solar Parabolic Trough Hybrid Design Using Molten Salt Heat Transfer Fluid: Preprint

    SciTech Connect (OSTI)

    Turchi, C. S.; Ma, Z.

    2011-08-01T23:59:59.000Z

    Parabolic trough power plants can provide reliable power by incorporating either thermal energy storage (TES) or backup heat from fossil fuels. This paper describes a gas turbine / parabolic trough hybrid design that combines a solar contribution greater than 50% with gas heat rates that rival those of natural gas combined-cycle plants. Previous work illustrated benefits of integrating gas turbines with conventional oil heat-transfer-fluid (HTF) troughs running at 390?C. This work extends that analysis to examine the integration of gas turbines with salt-HTF troughs running at 450 degrees C and including TES. Using gas turbine waste heat to supplement the TES system provides greater operating flexibility while enhancing the efficiency of gas utilization. The analysis indicates that the hybrid plant design produces solar-derived electricity and gas-derived electricity at lower cost than either system operating alone.

  6. Heat Transfer Analysis and Modeling of a Parabolic Trough Solar Receiver Implemented in Engineering Equation Solver

    SciTech Connect (OSTI)

    Forristall, R.

    2003-10-01T23:59:59.000Z

    This report describes the development, validation, and use of a heat transfer model implemented in Engineering Equation Solver. The model determines the performance of a parabolic trough solar collector's linear receiver, also called a heat collector element. All heat transfer and thermodynamic equations, optical properties, and parameters used in the model are discussed. The modeling assumptions and limitations are also discussed, along with recommendations for model improvement.

  7. Energetic protons from an ultraintense laser interacting with a symmetric parabolic concave target

    SciTech Connect (OSTI)

    Ali Bake, Muhammad; Xie Baisong [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Shan Zhang [Department of Mathematics and Physics, Shijiazhuang Tiedao University, Shijiazhuang 050043 (China); Wang Hongyu [Department of Physics, Anshan Normal University, Anshan 114005 (China); Shanghai Bright-Tech Information Technology Co. Ltd, Shanghai 200136 (China)

    2013-03-15T23:59:59.000Z

    A scheme of a symmetric parabolic concave target irradiated by an ultraintense laser for efficient proton acceleration is proposed and involved problem is studied by using two-dimensional particle-in-cell (PIC) simulations. Results indicate that on one hand, the laser field is focused by the front parabolic concave surface of target and, on the other hand, more energetic hot electrons will traverse to the rear surface of target due to concave shape. The space-charge-separation field, induced by those hot electrons escaping form parabolic concave rear surface of target, can accelerate protons to relatively high energy with narrow energy spread. The dependence of the efficiency of proton acceleration on the target parameters is examined, and the optimal target parameters are obtained. Particle-in-cell simulations show that the proton peak energy and energy spread are greatly enhanced when the target parameters are chosen optimal, for example, a proton bunch with the maximum energy {approx}27.5 MeV and energy spread {approx}7% can be generated. Some implications of our results to experiments and comparisons with the other works are also discussed briefly.

  8. Effects of gaps in adhesives that bond elastically deformed panels to parabolic, cylindrical substructures

    SciTech Connect (OSTI)

    Wilson, R.K.; Reuter, R.C. Jr.

    1982-03-01T23:59:59.000Z

    In previous studies of the mechanical behavior of line focusing solar collectors, the reflective surface panel was modeled as a thin, initially flat, elastic plate that underwent large displacements to attain the shape of a prescribed parabolic cylinder. Attention was focused upon the stresses that developed in an adhesive layer which bonded the deformed panel to a rigid, parabolic substructure. Among the myriad possible collector designs, some possess longitudinally oriented, hollow ribs or corrugations in the substructure which interrupt the transverse continuity of the bond line between the deformed panel and the substructure. Thus, finite gaps in the adhesive are present which create regions where the panel surface becomes intermittently supported. The presence of these gaps perturbs the otherwise smooth distribution of adhesive contact stresses and it is the analytical modeling of this behavior that is the subject of the present report. In particular, attention is devoted to gaps which overlap with the edge effect zone - a region near the rim or vertex of the deformed panel where, in the absence of uniform edge loads necessary to maintain a true parabolic shape, high stresses and associated deformations occur. Significant influences of the gap size and position in the edge effect zone are demonstrated and discussed.

  9. Smart lighting: New Roles for Light

    E-Print Network [OSTI]

    Salama, Khaled

    Smart lighting: New Roles for Light in the Solid State Lighting World Robert F. Karlicek, Jr. Director, Smart Lighting Engineering Research Center Professor, Electrical, Systems and Computer Lighting · What is Smart Lighting · Technology Barriers to Smart Lighting · Visible Light Communications

  10. DOCUMENTATION SPECIFIC TASK TRAINING PROGRAM

    E-Print Network [OSTI]

    Illinois at Urbana-Champaign, University of

    DOCUMENTATION APPENDIX SPECIFIC TASK TRAINING PROGRAM Conducted by the ILLINOIS CENTER ............................................................. Coordination of Contract Documents Art.105.05 Appendix Page 14

  11. Commercial Lighting

    Broader source: Energy.gov [DOE]

    Commercial lighting accounts for more than 20 percent of total commercial building energy use. The Energy Department works to reduce lighting energy use through research and deployment.

  12. Reactor Pressure Vessel Task of Light Water Reactor Sustainability Program:

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

    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: National5Sales for4,645 3,625 1,006 492 742EnergyOn April 23, 2014, an OHASeptember 2010In addition to 1National Broadband PlanDr. James

  13. Reactor Pressure Vessel Task of Light Water Reactor Sustainability Program:

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

    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: National5Sales for4,645 3,625 1,006 492 742EnergyOn April 23, 2014, an OHASeptember 2010In addition to 1National Broadband PlanDr.

  14. Reactor Pressure Vessel Task of Light Water Reactor Sustainability Program:

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

    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: National5Sales for4,645 3,625 1,006 492 742EnergyOn April 23, 2014, an OHASeptember 2010In addition to 1National Broadband PlanDr.Milestone

  15. Nuclear power plant control room operator control and monitoring tasks

    SciTech Connect (OSTI)

    Bovell, C.R.; Beck, M.G. [Concord Associates, Inc., Knoxville, TN (United States); Carter, R.J. [Oak Ridge National Labs., TN (United States)

    1998-07-01T23:59:59.000Z

    Oak Ridge National Laboratory is conducting a research project the purpose of which is to develop the technical bases for regulatory review criteria for use in evaluating the safety implications of human factors associated with the use of artificial intelligence and expert systems, and with advanced instrumentation and control (I and C) systems in nuclear power plants (NPP). This report documents the results from Task 8 of that project. The primary objectives of the task was to identify the scope and type of control and monitoring tasks now performed by control-room operators. Another purpose was to address the types of controls and safety systems needed to operate the nuclear plant. The final objective of Task 8 was to identify and categorize the type of information and displays/indicators required to monitor the performance of the control and safety systems. This report also discusses state-of-the-art controls and advanced display devices which will be available for use in control-room retrofits and in control room of future plants. The fundamental types of control and monitoring tasks currently conducted by operators can be divided into four classifications: function monitoring tasks, control manipulation tasks, fault diagnostic tasks, and administrative tasks. There are three general types of controls used in today`s NPPs, switches, pushbuttons, and analog controllers. Plant I and C systems include components to achieve a number of safety-related functions: measuring critical plant parameters, controlling critical plant parameters within safety limits, and automatically actuating protective devices if safe limits are exceeded. The types of information monitored by the control-room operators consist of the following parameters: pressure, fluid flow and level, neutron flux, temperature, component status, water chemistry, electrical, and process and area radiation. The basic types of monitoring devices common to nearly all NPP control rooms include: analog meters, graphic recorders, digital displays and counters, light indicators, visual and audio alarms, and cathode-ray tubes.

  16. An analytical model and performance data for a cylindrical parabolic collector

    SciTech Connect (OSTI)

    Ford, F.M.; Stewart, W.E.

    1980-12-01T23:59:59.000Z

    Concentrating solar collectors provide higher fluid temperatures than flat-plate, an important advantage in many applications. The parabolic cylinder is one of the most popular types of concentrating collectors because of its relatively simple construction and tracking configuration. A mathematical model was developed for one such collector in order to predict thermal efficiency as a function of solar insolation. An experiment was then devised in an attempt to verify this model. Discrepancies between predicted and observed values are discussed, and suggestions are made for improving the model and the experimental procedure.

  17. Omnium-G parabolic dish optical efficiency: a comparison of two independent measurement techniques

    SciTech Connect (OSTI)

    Bohn, M.; Gaul, H.

    1980-10-01T23:59:59.000Z

    Measurements made at SERI of the optical efficiency of the Omnium-G parabolic dish concentrator are described. Two independent techniques were used: the cold-water calorimeter method and the heat of fusion method. Results from both techniques agree quite well and indicate that the optical efficiency for a 10-cm receiver aperture is 25%. Optical efficiency measured in early 1979 was 37%, and in mid 1979 it had degraded to 21%. An optical alignment procedure is described that resulted in the increase in optical efficiency from 21% to the current value of 25%.

  18. Investigation of Q-tubes stability using the piecewise parabolic potential

    E-Print Network [OSTI]

    E. Nugaev; A. Shkerin

    2014-07-28T23:59:59.000Z

    We analyze the classical stability of Q-tubes --- charged extended objects in $(3+1)$-dimensional complex scalar field theory. Explicit solutions were found analytically in the piecewise parabolic potential. Our choice of potential allows us to construct a powerful method of stability investigation. We check that in the case of the zero winding number $n=0$, the previously known stability condition $\\partial^2E/\\partial Q^21$ becomes unstable towards the decay into the $n$ vortices with the single winding number.

  19. Security tasks are highly interdependent.

    E-Print Network [OSTI]

    Motivation Security tasks are highly interdependent. To improve security tools, we need to understand how security practitioners collaborate in their organizations. Security practitioners in context Exchange of Information Develop security tools that: · Integrate information from different communication

  20. Light Properties Light travels at the speed of light `c'

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    LIGHT!! #12;Light Properties Light travels at the speed of light `c' C = 3 x 108 m/s Or 190,000 miles/second!! Light could travel around the world about 8 times in one second #12;What is light?? Light is a "wave packet" A photon is a "light particle" #12;Electromagnetic Radiation and You Light is sometimes

  1. Task-space setpoint control of robots with dual task-space information

    E-Print Network [OSTI]

    Cheah, C. C.

    In conventional task-space control problem of robots, a single task-space information is used for the entire task. When the task-space control problem is formulated in image space, this implies that visual feedback is used ...

  2. Water Use in Parabolic Trough Power Plants: Summary Results from WorleyParsons' Analyses

    SciTech Connect (OSTI)

    Turchi, C. S.; Wagner, M. J.; Kutscher, C. F.

    2010-12-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL) contracted with WorleyParsons Group, Inc. to examine the effect of switching from evaporative cooling to alternative cooling systems on a nominal 100-MW parabolic trough concentrating solar power (CSP) plant. WorleyParsons analyzed 13 different cases spanning three different geographic locations (Daggett, California; Las Vegas, Nevada; and Alamosa, Colorado) to assess the performance, cost, and water use impacts of switching from wet to dry or hybrid cooling systems. NREL developed matching cases in its Solar Advisor Model (SAM) for each scenario to allow for hourly modeling and provide a comparison to the WorleyParsons results.Our findings indicate that switching from 100% wet to 100% dry cooling will result in levelized cost of electricity (LCOE) increases of approximately 3% to 8% for parabolic trough plants throughout most of the southwestern United States. In cooler, high-altitude areas like Colorado's San Luis Valley, WorleyParsons estimated the increase at only 2.5%, while SAM predicted a 4.4% difference. In all cases, the transition to dry cooling will reduce water consumption by over 90%. Utility time-of-delivery (TOD) schedules had similar impacts for wet- and dry-cooled plants, suggesting that TOD schedules have a relatively minor effect on the dry-cooling penalty.

  3. Wind loads on heliostats and parabolic dish collectors: Final subcontractor report

    SciTech Connect (OSTI)

    Peterka, J.A.; Tan, Z.; Bienkiewicz, B.; Cermak, J.E.

    1988-11-01T23:59:59.000Z

    A major intent of this study was to define wind load reduction factors for parabolic dish solar collectors within a field protected by upwind collectors, wind protective fences, or other blockages. This information will help researchers improve the economy of parabolic collector support structures and drive mechanisms. The method used in the study was to generalize wind load data obtained during tests on model collectors placed in a modeled atmospheric wind in a boundary-layer wind tunnel. A second objective of the study was to confirm and document a sensitivity in load to level of turbulence, or gustiness, in the approaching wind. A key finding was that wind-load reduction factors for forces (horizontal and vertical) were roughly similar to those for flat heliostats, with some forces significantly less than those for flat shapes. However, load reductions for moments showed a smaller load reduction, particularly for the azimuth moment. The lack of load reduction could be attributed to collector shape, but specific flow features responsible for and methods to induce a load reduction were not explored. 62 figs., 13 tabs.

  4. Large Parabolic Dish collectors with small gas-turbine, Stirling engine or photovoltaic power conversion systems

    SciTech Connect (OSTI)

    Gehlisch, K.; Heikal, H.; Mobarak, A.; Simon, M.

    1982-08-01T23:59:59.000Z

    A comparison for different solar thermal power plants is presented and demonstrates that the large parabolic dish in association with a gas turbine or a Sterling engine could be a competitive system design in the net power range of 50-1000KW. The important advantages of the Large Parabolic Dish concept compared to the Farm and Tower concept are discussed: concentration ratios up to 5000 and uniform heat flux distribution throughout the day which allow very high receiver temperatures and therefor high receiver efficiency to operate effectively Stirling motors or small gas turbines in the mentioned power range with an overall efficiency of 20 to 30%. The high focal plane concentration leads to the efficient use of ceramic materials for receivers of the next generation, applicable in temperature ranges up to 1,300 /sup 0/C for energy converters. Besides the production of electricity, the system can supply process heat in the temperature range of 100 to 400 /sup 0/C as waste heat from the gas turbo converter and heat at temperature levels from 500 to 900 /sup 0/C (1300 /sup 0/C) directly out of the receiver.

  5. Smart Lighting Controller!! Smart lighting!

    E-Print Network [OSTI]

    Anderson, Betty Lise

    1! Smart Lighting Controller!! #12;2! Smart lighting! No need to spend energy lighting the room if://blogs.stthomas.edu/realestate/2011/01/24/residential-real-estate-professionals-how-do-you- develop feedback! There is a connection between the output and the input! Therefore forces inputs to same voltage

  6. SCE Classroom Lighting Guidelines 38 September 2004 Design Description

    E-Print Network [OSTI]

    SCE Classroom Lighting Guidelines 38 September 2004 EXAMPLE 1 Design Description In this design, the ambient lighting system uses two, twenty foot of semi-indirect luminaires that are suspended in 2 rows electronic ballasts. The whiteboard task light is a linear wallwasher about 12 feet long that uses (3) Super

  7. EXAMINATION OF THE FEASIBILITY FOR DEMONSTRATION AND USE OF RADIOLUMINESCENT LIGHTS FOR ALASKAN REMOTE RUNWAY LIGHTING

    SciTech Connect (OSTI)

    Jensen, G.; Perrigo, L.; Leonard, L.; Hegdal, L

    1984-01-01T23:59:59.000Z

    This report examines the feasibility of radioluminescent light applications for rural Alaskan airports. The work presented in this report covers four tasks: State of the Art Evaluation of Radioluminescent Lights, Environmental, Radiological, and Regulatory Evaluations, Engineering Evaluations, and Demonstration Plan Development.

  8. Windows and lighting program

    SciTech Connect (OSTI)

    Not Available

    1990-06-01T23:59:59.000Z

    More than 30% of all energy use in buildings is attributable to two sources: windows and lighting. Together they account for annual consumer energy expenditures of more than $50 billion. Each affects not only energy use by other major building systems, but also comfort and productivity -- factors that influence building economics far more than does direct energy consumption alone. Windows play a unique role in the building envelope, physically separating the conditioned space from the world outside without sacrificing vital visual contact. Throughout the indoor environment, lighting systems facilitate a variety of tasks associated with a wide range of visual requirements while defining the luminous qualities of the indoor environment. Windows and lighting are thus essential components of any comprehensive building science program. Despite important achievements in reducing building energy consumption over the past decade, significant additional savings are still possible. These will come from two complementary strategies: (1) improve building designs so that they effectively apply existing technologies and extend the market penetration of these technologies; and (2) develop advanced technologies that increase the savings potential of each application. Both the Windows and Daylighting Group and the Lighting System Research Group have made substantial contributions in each of these areas, and continue to do so through the ongoing research summarized here. 23 refs., 16 figs.

  9. Cerenkov Light

    ScienceCinema (OSTI)

    Slifer, Karl

    2014-05-22T23:59:59.000Z

    The bright blue glow from nuclear reactors is Cerenkov light. Karl Slifer describes how nuclear physicists can use this phenomenon to study the nucleus of the atom.

  10. Cerenkov Light

    SciTech Connect (OSTI)

    Slifer, Karl

    2013-06-13T23:59:59.000Z

    The bright blue glow from nuclear reactors is Cerenkov light. Karl Slifer describes how nuclear physicists can use this phenomenon to study the nucleus of the atom.

  11. Lighting Renovations

    Broader source: Energy.gov [DOE]

    When undertaking a lighting renovation in a Federal building, daylighting is the primary renewable energy opportunity. Photovoltaics (PV) also present an excellent opportunity. While this guide...

  12. FAQS Job Task Analyses- Industrial Hygiene

    Broader source: Energy.gov [DOE]

    FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

  13. FAQS Job Task Analyses- General Technical Base

    Broader source: Energy.gov [DOE]

    FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

  14. FAQS Job Task Analyses- DOE Aviation Manager

    Broader source: Energy.gov [DOE]

    FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

  15. FAQS Job Task Analyses- Quality Assurance

    Broader source: Energy.gov [DOE]

    FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

  16. REACHING AGREEMENT A Fundamental Task--

    E-Print Network [OSTI]

    Schneider, Fred B.

    REACHING AGREEMENT A Fundamental Task-- Even in Distributed Computer Systems by Fred B. Schneider consists of a collection of computers interconnected by communication channels. The computers are usually that will achieve ByzantineAgreement: Agreement. All nontraitorous generals execute the same action. Validity

  17. Task Group 9 Update (Presentation)

    SciTech Connect (OSTI)

    Bosco, N.

    2014-04-01T23:59:59.000Z

    This presentation is a brief update of IEC TC82 QA Task Force, Group 9. Presented is an outline of the recently submitted New Work Item Proposal (NWIP) for a Comparative Thermal Cycling Test for CPV Modules to Differentiate Thermal Fatigue Durability.

  18. Parabolic Trough Reference Plant for Cost Modeling with the Solar Advisor Model (SAM)

    SciTech Connect (OSTI)

    Turchi, C.

    2010-07-01T23:59:59.000Z

    This report describes a component-based cost model developed for parabolic trough solar power plants. The cost model was developed by the National Renewable Energy Laboratory (NREL), assisted by WorleyParsons Group Inc., for use with NREL's Solar Advisor Model (SAM). This report includes an overview and explanation of the model, two summary contract reports from WorleyParsons, and an Excel spreadsheet for use with SAM. The cost study uses a reference plant with a 100-MWe capacity and six hours of thermal energy storage. Wet-cooling and dry-cooling configurations are considered. The spreadsheet includes capital and operating cost by component to allow users to estimate the impact of changes in component costs.

  19. Study of degenerate parabolic system modeling the hydrogen displacement in a nuclear waste repository

    E-Print Network [OSTI]

    Caro, Florian; Saad, Mazen

    2012-01-01T23:59:59.000Z

    Our goal is the mathematical analysis of a two phase (liquid and gas) two components (water and hydrogen) system modeling the hydrogen displacement in a storage site for radioactive waste. We suppose that the water is only in the liquid phase and is incompressible. The hydrogen in the gas phase is supposed compressible and could be dissolved into the water with the Henry's law. The flow is described by the conservation of the mass of each components. The model is treated without simplified assumptions on the gas density. This model is degenerated due to vanishing terms. We establish an existence result for the nonlinear degenerate parabolic system based on new energy estimate on pressures.

  20. Two-dimensional and three-dimensional Coulomb clusters in parabolic traps

    SciTech Connect (OSTI)

    D'yachkov, L. G., E-mail: dyachk@mail.ru; Myasnikov, M. I., E-mail: miasnikovmi@mail.ru [Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow 125412 (Russian Federation); Petrov, O. F. [Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow 125412 (Russian Federation); Moscow Institute of Physics and Technology (State University), Dolgoprudny 141700, Moscow Region (Russian Federation); Center for Astrophysics, Space Physics, and Engineering Research (CASPER), Baylor University, Waco, Texas 76798-7310 (United States); Hyde, T. W.; Kong, J.; Matthews, L. [Center for Astrophysics, Space Physics, and Engineering Research (CASPER), Baylor University, Waco, Texas 76798-7310 (United States)

    2014-09-15T23:59:59.000Z

    We consider the shell structure of Coulomb clusters in an axially symmetric parabolic trap exhibiting a confining potential U{sub c}(?,z)=(m?{sup 2}/2)(?{sup 2}+?z{sup 2}). Assuming an anisotropic parameter ??=?4 (corresponding to experiments employing a cusp magnetic trap under microgravity conditions), we have calculated cluster configurations for particle numbers N?=?3 to 30. We have shown that clusters with N???12 initially remain flat, transitioning to three-dimensional configurations as N increases. For N?=?8, we have calculated the configurations of minimal potential energy for all values of ? and found the points of configuration transitions. For N?=?13 and 23, we discuss the influence of both the shielding and anisotropic parameter on potential energy, cluster size, and shell structure.

  1. Utility-Scale Parabolic Trough Solar Systems: Performance Acceptance Test Guidelines, April 2009 - December 2010

    SciTech Connect (OSTI)

    Kearney, D.

    2011-05-01T23:59:59.000Z

    Prior to commercial operation, large solar systems in utility-size power plants need to pass a performance acceptance test conducted by the engineering, procurement, and construction (EPC) contractor or owners. In lieu of the present absence of ASME or other international test codes developed for this purpose, the National Renewable Energy Laboratory has undertaken the development of interim guidelines to provide recommendations for test procedures that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The Guidelines contained here are specifically written for parabolic trough collector systems with a heat-transport system using a high-temperature synthetic oil, but the basic principles are relevant to other CSP systems.

  2. Current and Future Costs for Parabolic Trough and Power Tower Systems in the US Market: Preprint

    SciTech Connect (OSTI)

    Turchi, C.; Mehos, M.; Ho, C. K.; Kolb, G. J.

    2010-10-01T23:59:59.000Z

    NREL's Solar Advisor Model (SAM) is employed to estimate the current and future costs for parabolic trough and molten salt power towers in the US market. Future troughs are assumed to achieve higher field temperatures via the successful deployment of low melting-point, molten-salt heat transfer fluids by 2015-2020. Similarly, it is assumed that molten salt power towers are successfully deployed at 100MW scale over the same time period, increasing to 200MW by 2025. The levelized cost of electricity for both technologies is predicted to drop below 11 cents/kWh (assuming a 10% investment tax credit and other financial inputs outlined in the paper), making the technologies competitive in the marketplace as benchmarked by the California MPR. Both technologies can be deployed with large amounts of thermal energy storage, yielding capacity factors as high as 65% while maintaining an optimum LCOE.

  3. Relating productivity to visibility and lighting

    SciTech Connect (OSTI)

    Clear, R.; Berman, S.

    1982-01-01T23:59:59.000Z

    The problem of determining the appropriate light levels for visual tasks is a cost-benefit problem. Existing light level recommendations seriously underweight the importance of economic factors. Furthermore, the relative importance of the visibility factors in determining the optimal light levels appears inconsistent with the importance of these factors in determining visibility and visual performance. It is shown that calculations based on acuities give a lower limit of 100 to 200 lux for cost-effective light levels for office tasks. Upper limits are calculated from correlations of task performance to visibility levels. Visibility levels become progressively insensitive to luminance as luminance increases. Average power densities above 100 watts/m/sup 2/ are cost-effective only when visibility is very low. However, there is a 3-to-10 times larger increase in benefits from improving contrast or contrast sensitivity than from using more than 10 watts/m/sup 2/. Contrast or contrast sensitivity can be improved by using forms with larger print, using xerographic copy instead of carbon or mimeo, making sure office workers have the right eyeglasses, or even by transferring workers with visual problems to less visually demanding tasks. Once these changes are made it is no longer cost-effective to use more than 10 watts/m/sup 2/. This conclusion raises serious questions about recommendations that lead to greater than about 10 watts/m/sup 2/ of installed lighting for general office work.

  4. Effects of motivational strategies on middle school mathematics students' on-task behavior

    E-Print Network [OSTI]

    Butler, Lori

    2002-01-01T23:59:59.000Z

    , such as by flickering lights or offering rewards instead of engaging students with the material (Newby, 1991). The research shows that teachers should be spending their time attaching relevance to the content and increasing students confidence as opposed to tasks... that are unrelated to the content (Newby, 1991). Instilling intrinsic motivation in students allows them to take ownership of their learning (Lumsden, 1994). Extrinsic motivation, on the other hand, is said to be unrelated to the task and, in time, will evoke a...

  5. Menstrual cycle effects on spatial location tasks

    E-Print Network [OSTI]

    Andrew, Sarah

    2013-02-22T23:59:59.000Z

    The relationship between menstrual cycle hormones and performance on gender-linked spatial tasks was examined in college women. Healthy women and men over the age of 18 and not taking hormonal preparations completed tasks that typically show a male...

  6. Fault-tolerant dynamic task graph scheduling

    SciTech Connect (OSTI)

    Kurt, Mehmet C.; Krishnamoorthy, Sriram; Agrawal, Kunal; Agrawal, Gagan

    2014-11-16T23:59:59.000Z

    In this paper, we present an approach to fault tolerant execution of dynamic task graphs scheduled using work stealing. In particular, we focus on selective and localized recovery of tasks in the presence of soft faults. We elicit from the user the basic task graph structure in terms of successor and predecessor relationships. The work stealing-based algorithm to schedule such a task graph is augmented to enable recovery when the data and meta-data associated with a task get corrupted. We use this redundancy, and the knowledge of the task graph structure, to selectively recover from faults with low space and time overheads. We show that the fault tolerant design retains the essential properties of the underlying work stealing-based task scheduling algorithm, and that the fault tolerant execution is asymptotically optimal when task re-execution is taken into account. Experimental evaluation demonstrates the low cost of recovery under various fault scenarios.

  7. Nuclear Radiological Threat Task Force Established | National...

    National Nuclear Security Administration (NNSA)

    Radiological Threat Task Force Established | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing...

  8. NREL Job Task Analysis: Crew Leader

    SciTech Connect (OSTI)

    Kurnik, C.; Woodley, C.

    2011-05-01T23:59:59.000Z

    A summary of job task analyses for the position of crew leader when conducting weatherization work on a residence.

  9. Task Performance is Prioritized Over Energy Reduction

    E-Print Network [OSTI]

    1 Task Performance is Prioritized Over Energy Reduction Ravi Balasubramanian*, Member, IEEE, Robert requirements were increased. These results indicated that task performance may be prioritized over energy main results: (1) More trials were required for a brief contact task to find a low-energy strategy when

  10. L{sup p} Theory for Super-Parabolic Backward Stochastic Partial Differential Equations in the Whole Space

    SciTech Connect (OSTI)

    Du Kai, E-mail: kdu@fudan.edu.cn; Qiu, Jinniao, E-mail: 071018032@fudan.edu.cn; Tang Shanjian, E-mail: sjtang@fudan.edu.cn [Fudan University, Department of Finance and Control Sciences, School of Mathematical Sciences, and Laboratory of Mathematics for Nonlinear Sciences (China)

    2012-04-15T23:59:59.000Z

    This paper is concerned with semi-linear backward stochastic partial differential equations (BSPDEs for short) of super-parabolic type. An L{sup p}-theory is given for the Cauchy problem of BSPDEs, separately for the case of p Element-Of (1,2] and for the case of p Element-Of (2,{infinity}). A comparison theorem is also addressed.

  11. WORKPLACE HAZARD ASSESSMENT Location: Task

    E-Print Network [OSTI]

    Rubloff, Gary W.

    /Eyes Hands Foot Body 7. THERMAL HAZARD DOES NOT EXIST DOES EXIST SOURCE OF HAZARD Welding Brazing Furnace/NON-IONIZING RADIATION HAZARD DOES NOT EXIST DOES EXIST SOURCE OF HAZARD Heat Treating Brazing Welding Oxygen Cutting Laser High Intensity Lighting Body Part Affected Head Face/Eyes Hands Foot Body #12;

  12. TASK 40: Sustainable International Bio Energy Trade: securing supply Overview of the task

    E-Print Network [OSTI]

    Page 1 TASK 40: Sustainable International Bio Energy Trade: securing supply and demand Overview of the task The objective of Task 40 is to investigate what is needed to create a "commodity market" for bio-energy's, the task will contribute to the development of sustainable bio-energy markets on short and on long term

  13. Wood Fuel Task Force Response 2 | Wood Fuel Task Force Response

    E-Print Network [OSTI]

    Wood Fuel Task Force Response #12;2 | Wood Fuel Task Force Response #12;Wood Fuel Task Force Response | 3 Wood Fuel Task Force Response Scottish Government response by Minister for Environment, Michael Russell I am pleased to present on behalf of the Scottish Government our response to the Wood Fuel

  14. Multiple systems or task complexity 1 Running head: Multiple systems or task complexity

    E-Print Network [OSTI]

    Stoiciu, Mihai

    Multiple systems or task complexity 1 Running head: Multiple systems or task complexity Procedural memory effects in categorization: evidence for multiple systems or task complexity? Safa R. Zaki and Dave College Williamstown, MA 10267 413-597-4594 Email: szaki@williams.edu #12;Multiple systems or task

  15. The Parabolic variance (PVAR), a wavelet variance based on least-square fit

    E-Print Network [OSTI]

    Vernotte, F; Bourgeois, P -Y; Rubiola, E

    2015-01-01T23:59:59.000Z

    The Allan variance (AVAR) is one option among the wavelet variances. However a milestone in the analysis of frequency fluctuations and in the long-term stability of clocks, and certainly the most widely used one, AVAR is not suitable when fast noise processes show up, chiefly because of the poor rejection of white phase noise. The modified Allan variance (MVAR) features high resolution in the presence of white PM noise, but it is poorer for slow phenomena because the wavelet spans over 50% longer time. This article introduces the Parabolic Variance (PVAR), a wavelet variance similar to the Allan variance, based on the Linear Regression (LR) of phase data. The PVAR relates to the Omega frequency counter, which is the topics of a companion article [the reference to the article, or to the ArXiv manuscript, will be provided later]. The PVAR wavelet spans over 2 tau, the same of the AVAR wavelet. After setting the theoretical framework, we analyze the degrees of freedom and the detection of weak noise processes in...

  16. Development of Performance Acceptance Test Guidelines for Large Commercial Parabolic Trough Solar Fields: Preprint

    SciTech Connect (OSTI)

    Kearney, D.; Mehos, M.

    2010-12-01T23:59:59.000Z

    Prior to commercial operation, large solar systems in utility-size power plants need to pass a performance acceptance test conducted by the EPC contractor or owners. In lieu of the present absence of engineering code developed for this purpose, NREL has undertaken the development of interim guidelines to provide recommendations for test procedures that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The fundamental differences between acceptance of a solar power plant and a conventional fossil-fired plant are the transient nature of the energy source and the necessity to utilize an analytical performance model in the acceptance process. These factors bring into play the need to establish methods to measure steady state performance, potential impacts of transient processes, comparison to performance model results, and the possible requirement to test, or model, multi-day performance within the scope of the acceptance test procedure. The power block and BOP are not within the boundaries of this guideline. The current guideline is restricted to the solar thermal performance of parabolic trough systems and has been critiqued by a broad range of stakeholders in CSP development and technology.

  17. Light Computing

    E-Print Network [OSTI]

    Gordon Chalmers

    2006-10-13T23:59:59.000Z

    A configuration of light pulses is generated, together with emitters and receptors, that allows computing. The computing is extraordinarily high in number of flops per second, exceeding the capability of a quantum computer for a given size and coherence region. The emitters and receptors are based on the quantum diode, which can emit and detect individual photons with high accuracy.

  18. Employee Job Task Analysis (EJTA) PIA, Richland Operations Office...

    Office of Environmental Management (EM)

    Job Task Analysis (EJTA) PIA, Richland Operations Office Employee Job Task Analysis (EJTA) PIA, Richland Operations Office Employee Job Task Analysis (EJTA) PIA, Richland...

  19. Residential Lighting

    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's PossibleRadiation Protection Technical squestionnairesquestionnaires AgreementLighting

  20. Spectrally Enhanced Lighting Program Implementation for Energy Savings: Field Evaluation

    SciTech Connect (OSTI)

    Gordon, Kelly L.; Sullivan, Gregory P.; Armstrong, Peter R.; Richman, Eric E.; Matzke, Brett D.

    2006-08-22T23:59:59.000Z

    This report provides results from an evaluation PNNL conducted of a spectrally enhanced lighting demonstration project. PNNL performed field measurements and occupant surveys at three office buildings in California before and after lighting retrofits were made in August and December 2005. PNNL measured the following Overhead lighting electricity demand and consumption, Light levels in the workspace, Task lighting use, and Occupant ratings of satisfaction with the lighting. Existing lighting, which varied in each building, was replaced with lamps with correlated color temperature (CCT) of 5000 Kelvin, color rendering index (CRI) of 85, of varying wattages, and lower ballast factor electronic ballasts. The demonstrations were designed to decrease lighting power loads in the three buildings by 22-50 percent, depending on the existing installed lamps and ballasts. The project designers hypothesized that this reduction in electrical loads could be achieved by the change to higher CCT lamps without decreasing occupant satisfaction with the lighting.

  1. Task Interaction in an HTN Planner

    E-Print Network [OSTI]

    Georgievski, Il?e; Aiello, Marco

    2011-01-01T23:59:59.000Z

    Hierarchical Task Network (HTN) planning uses task decomposition to plan for an executable sequence of actions as a solution to a problem. In order to reason effectively, an HTN planner needs expressive domain knowledge. For instance, a simplified HTN planning system such as JSHOP2 uses such expressivity and avoids some task interactions due to the increased complexity of the planning process. We address the possibility of simplifying the domain representation needed for an HTN planner to find good solutions, especially in real-world domains describing home and building automation environments. We extend the JSHOP2 planner to reason about task interaction that happens when task's effects are already achieved by other tasks. The planner then prunes some of the redundant searches that can occur due to the planning process's interleaving nature. We evaluate the original and our improved planner on two benchmark domains. We show that our planner behaves better by using simplified domain knowledge and outperforms ...

  2. Lighting Inventory Lighting Theatre and Drama

    E-Print Network [OSTI]

    Indiana University

    Lighting Inventory Lighting Theatre and Drama Description Totals R.Halls Wells- Metz Light ERS ETC SourceFour 25 25 50 degree ERS Strand Lighting 64 14 24 12 14 36 degree ERS ETC Source Four 15 15 36 degree ERS Strand Lighting 124 60 58 2 4 26 degree ERS ETC SourceFour 2 2 26 degree ERS Strand

  3. 3X compound parabolic concentrating (CPC) solar energy collector. Final technical report

    SciTech Connect (OSTI)

    Ballheim, R.W.

    1980-04-25T23:59:59.000Z

    Chamberlain engineers designed a 3X compound parabolic concentrating (CPC) collector for the subject contract. The collector is a completely housed, 105.75 x 44.75 x 10.23-inch, 240-pound unit with six each evacuated receiver assemblies, a center manifold and a one-piece glass cover. A truncated version of a CPC trough reflector system and the General Electric Company tubular evacuated receiver have been integrated with a mass producible collector design suitable for operation at 250 to 450/sup 0/F. The key criterion for optimization of the design was minimization of the cost per Btu collected annually at an operating temperature of 400/sup 0/F. The reflector is a 4.1X design truncated to a total height of 8.0 inches with a resulting actual concentration ratio of 2.6 to 1. The manifold is an insulated area housing the fluid lines which connect the six receivers in series with inlet and outlet tubes extending from one side of the collector at the center. The reflectors are polished, anodized aluminum which are shaped by the roll form process. The housing is painted, galvanized steel, and the cover glass is 3/16-inch thick tempered, low iron glass. The collector requires four slope adjustments per year for optimum effectiveness. Chamberlain produced ten 3X CPC collectors for the subject contract. Two collectors were used to evaluate assembly procedures, six were sent to the project officer in Albuquerque, New Mexico, one was sent to Argonne National Laboratory for performance testing and one remained with the Company. A manufacturing cost study was conducted to estimate limited mass production costs, explore cost reduction ideas and define tooling requirements. The final effort discussed shows the preliminary design for application of a 3X CPC solar collector system for use in the Iowa State Capitol complex.

  4. Joint Outreach Task Group Calendar: September 2013

    Broader source: Energy.gov [DOE]

    Joint Outreach Task Group (JOTG)has created a monthly calendar of community events to facilitate interagency and community involvement in these events. September 2013

  5. ESPC Task Order Face Page Template

    Broader source: Energy.gov [DOE]

    Document provides a face page template for a U.S. Department of Energy task order as part of an energy savings performance contract (ESPC).

  6. Interagency Energy Management Task Force Members

    Broader source: Energy.gov [DOE]

    The Interagency Energy Management Task Force is led by the Federal Energy Management Program director. Members include energy and sustainability managers from federal agencies.

  7. NREL Job Task Analysis: Energy Auditor

    SciTech Connect (OSTI)

    Kurnik, C.; Woodley, C.

    2011-05-01T23:59:59.000Z

    A summary of job task analyses for the position of energy auditor when evaluating a residence before and during weatherization work.

  8. NREL Job Task Analysis: Quality Control Inspector

    SciTech Connect (OSTI)

    Kurnik, C.; Woodley, C.

    2011-05-01T23:59:59.000Z

    A summary of job task analyses for the position of quality control inspector when evaluating weatherization work that has been done on a residence.

  9. Document prepared by APIC Bioterrorism Task Force

    E-Print Network [OSTI]

    Oliver, Douglas L.

    ATTACHMENT Document prepared by APIC Bioterrorism Task Force Judith F. English, Mae Y. Cundiff of civilian populations not recommended. 3. Infection Control Practices for Patient Management Symptomatic

  10. Energy Conservation in Industrial Lighting

    E-Print Network [OSTI]

    Meharg, E.

    1979-01-01T23:59:59.000Z

    color of the fluorescent is a further advantage indoors. I INCAllDESCEiH 120000 3000 I 2500 ! L1FECOS LIFECOS;-$j 100000 2)00 250 W. _IIERCURY 80000 1500 50000 HPS 1000 f ! 40000 500 VARIOUS LIGHT SOURCES 20000 OUTDOOR LTG. - 10 t... MACHINE SHOP O~-=-=-----::-::------:::----,-,------=----------- o ro w ~~~ w ro ~ ~~ ill 120 ILLUMINATION LEVEL - FOOTCANDLES (MAINTAINED) HPS AT 30 FT. MTG. HT. PLUS INCAIWESCENT TASK LTG. ROOM: 230 X 45 FT. FIGURE 4 A similar illustration is given...

  11. LED Lighting Basics

    Broader source: Energy.gov [DOE]

    Light-Emitting diodes (LEDs) efficiently produce light in a fundamentally different way than any legacy or traditional source of light.

  12. Light Source

    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: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let us count theLienertLift Forces in a Light

  13. Development of Molten-Salt Heat Transfer Fluid Technology for Parabolic Trough Solar Power Plants - Public Final Technical Report

    SciTech Connect (OSTI)

    Grogan, Dylan C. P.

    2013-08-15T23:59:59.000Z

    Executive Summary This Final Report for the "Development of Molten-Salt Heat Transfer Fluid (HTF) Technology for Parabolic Trough Solar Power Plants” describes the overall project accomplishments, results and conclusions. Phase 1 analyzed the feasibility, cost and performance of a parabolic trough solar power plant with a molten salt heat transfer fluid (HTF); researched and/or developed feasible component options, detailed cost estimates and workable operating procedures; and developed hourly performance models. As a result, a molten salt plant with 6 hours of storage was shown to reduce Thermal Energy Storage (TES) cost by 43.2%, solar field cost by 14.8%, and levelized cost of energy (LCOE) by 9.8% - 14.5% relative to a similar state-of-the-art baseline plant. The LCOE savings range met the project’s Go/No Go criteria of 10% LCOE reduction. Another primary focus of Phase 1 and 2 was risk mitigation. The large risk areas associated with a molten salt parabolic trough plant were addressed in both Phases, such as; HTF freeze prevention and recovery, collector components and piping connections, and complex component interactions. Phase 2 analyzed in more detail the technical and economic feasibility of a 140 MWe,gross molten-salt CSP plant with 6 hours of TES. Phase 2 accomplishments included developing technical solutions to the above mentioned risk areas, such as freeze protection/recovery, corrosion effects of applicable molten salts, collector design improvements for molten salt, and developing plant operating strategies for maximized plant performance and freeze risk mitigation. Phase 2 accomplishments also included developing and thoroughly analyzing a molten salt, Parabolic Trough power plant performance model, in order to achieve the project cost and performance targets. The plant performance model and an extensive basic Engineering, Procurement, and Construction (EPC) quote were used to calculate a real levelized cost of energy (LCOE) of 11.50¢/kWhe , which achieved the Phase 2 Go/No Go target of less than 0.12¢/kWhe. Abengoa Solar has high confidence that the primary risk areas have been addressed in the project and a commercial plant utilizing molten salt is economically and technically feasible. The strong results from the Phase 1 and 2 research, testing, and analyses, summarized in this report, led Abengoa Solar to recommend that the project proceed to Phase 3. However, a commercially viable collector interconnection was not fully validated by the end of Phase 2, combined with the uncertainty in the federal budget, forced the DOE and Abengoa Solar to close the project. Thus the resources required to construct and operate a molten salt pilot plant will be solely supplied by Abengoa Solar.

  14. Sustainability Initiative Task Force Final Report

    E-Print Network [OSTI]

    Sheridan, Jennifer

    UW­Madison Sustainability Initiative Task Force Final Report October 2010 #12;We are pleased to present the final report of the campus Sustainability Task Force. This report fulfills the charge we gave to sustainability for consideration by UW­Madison's leadership and campus community. There are many reasons why

  15. Water Conservation Task Force (2014 Charge)

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Water Conservation Task Force (2014 Charge) The Task Force will advise the Chancellor and Campus Provost/Executive Vice Chancellor (CP/EVC) on current and past water use and provide recommendations on implementation of policies for potable water use reductions in support of The Regents Policy on Sustainable

  16. Component Metadata for Software Engineering Tasks

    E-Print Network [OSTI]

    Harrold, Mary Jean

    functions. In particular, she has no source code, no reliability or safety information, no in- formationComponent Metadata for Software Engineering Tasks Alessandro Orso1 , Mary Jean Harrold1 , and David of an application developer who wants to perform two different software engineering tasks on her application: gen

  17. Exploiting Variable Stiffness in Explosive Movement Tasks

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    robots. The proposed methodology is applied to a ball- throwing task where we demonstrate that: (i, with the motivation of (i) improving safety of robots and humans (by providing an intrinsic compliance) [26], (iiExploiting Variable Stiffness in Explosive Movement Tasks David J. Braun, Matthew Howard and Sethu

  18. Muon Collider Task Force Report

    SciTech Connect (OSTI)

    Ankenbrandt, C.; Alexahin, Y.; Balbekov, V.; Barzi, E.; Bhat, C.; Broemmelsiek, D.; Bross, A.; Burov, A.; Drozhdin, A.; Finley, D.; Geer, S.; /Fermilab /Argonne /Brookhaven /Jefferson Lab /LBL, Berkeley /MUONS Inc., Batavia /UCLA /UC, Riverside /Mississippi U.

    2007-12-01T23:59:59.000Z

    Muon Colliders offer a possible long term path to lepton-lepton collisions at center-of-mass energies {radical}s {ge} 1 TeV. In October 2006 the Muon Collider Task Force (MCTF) proposed a program of advanced accelerator R&D aimed at developing the Muon Collider concept. The proposed R&D program was motivated by progress on Muon Collider design in general, and in particular, by new ideas that have emerged on muon cooling channel design. The scope of the proposed MCTF R&D program includes muon collider design studies, helical cooling channel design and simulation, high temperature superconducting solenoid studies, an experimental program using beams to test cooling channel RF cavities and a 6D cooling demonstration channel. The first year of MCTF activities are summarized in this report together with a brief description of the anticipated FY08 R&D activities. In its first year the MCTF has made progress on (1) Muon Collider ring studies, (2) 6D cooling channel design and simulation studies with an emphasis on the HCC scheme, (3) beam preparations for the first HPRF cavity beam test, (4) preparations for an HCC four-coil test, (5) further development of the MANX experiment ideas and studies of the muon beam possibilities at Fermilab, (6) studies of how to integrate RF into an HCC in preparation for a component development program, and (7) HTS conductor and magnet studies to prepare for an evaluation of the prospects for of an HTS high-field solenoid build for a muon cooling channel.

  19. Task mapping for non-contiguous allocations.

    SciTech Connect (OSTI)

    Leung, Vitus Joseph; Bunde, David P. [Knox College, Galesburg, IL; Ebbers, Johnathan [Knox College, Galesburg, IL; Price, Nicholas W. [Knox College, Galesburg, IL; Swank, Matthew [Knox College, Galesburg, IL; Feer, Stefan P. [3M Health Information Systems, Inc., Wallingford, CT; Rhodes, Zachary D. [Allstate Corporation, Northbrook, IL

    2013-02-01T23:59:59.000Z

    This paper examines task mapping algorithms for non-contiguously allocated parallel jobs. Several studies have shown that task placement affects job running time for both contiguously and non-contiguously allocated jobs. Traditionally, work on task mapping either uses a very general model where the job has an arbitrary communication pattern or assumes that jobs are allocated contiguously, making them completely isolated from each other. A middle ground between these two cases is the mapping problem for non-contiguous jobs having a specific communication pattern. We propose several task mapping algorithms for jobs with a stencil communication pattern and evaluate them using experiments and simulations. Our strategies improve the running time of a MiniApp by as much as 30% over a baseline strategy. Furthermore, this improvement increases markedly with the job size, demonstrating the importance of task mapping as systems grow toward exascale.

  20. Solid State Lighting Program

    SciTech Connect (OSTI)

    Theodore D. Moustakas

    2007-11-30T23:59:59.000Z

    The project had two main tasks: One addressed the materials and device development and it was carried out at Boston University. The second addressed the theory and simulation of materials and devices and it was carried out at Science Application International Corporation (SAIC). Each task had a number of sub-tasks which are described in the following table. Progress in these tasks is described in this section.

  1. Efficient tunable switch from slow light to fast light in quantum opto-electromechanical system

    E-Print Network [OSTI]

    M. Javed Akram; Khalid Naseer; Farhan Saif

    2015-03-05T23:59:59.000Z

    The control of slow and fast light propagation, in the probe transmission in a single experiment, is a challenging task. This type of control can only be achieved through highly nonlinear interactions and additional interfering pathway(s), which is therefore seldom reported. Here, we devise a scheme in which slow light, and a tunable switch from slow light to fast light can be achieved in the probe transmission based on a hybrid setup, which is composed of an optical cavity with two charged nano mechanical resonators (MRs). The two MRs are electrostatically coupled via tunable Coulomb coupling strength ($g_{c}$) making a quantum opto-electromechanical system (QOEMS). The parameter $g_{c}$ that couples the two MRs can be switched on and off by controlling the bias voltages on the MRs, and acts as a tunable switch that allows the propagation of transmitted probe field as slow light ($g_{c} \

  2. Monetary Interventions in Crowdsourcing Task Switching

    E-Print Network [OSTI]

    Chen, Yiling

    intervention treatments No Bonus Switch Bonus Repetition Bonus × 15 experimental ­ Accuracy ­ Innately compete with each other · Performance-contingent bonuses ­ Receive bonus in a task if the answer is correct and the reaction time

  3. Clinch River MRS Task Force Recommendations

    Broader source: Energy.gov [DOE]

    The Clinch River HRS Task Force was appointed in July 1985 by the Roane County Executive and the Oak Ridge City Council to evaluate the Monitored Retrievable Storage (MRS) facility proposed by the...

  4. Agencies Approve Bacteria TMDL Task Force Recommendations 

    E-Print Network [OSTI]

    Wythe, Kathy

    2007-01-01T23:59:59.000Z

    tx H2O | pg. 10 In June 2007 the Texas Commission onEnvironmental Quality (TCEQ) and the TexasState Soil and Water Conservation Board (TSSW- CB) approved the recommendations of the Bacteria Total Maximum Daily Load (TMDL) Task Force and asked... their agencies to update their TMDL guidance documents to reflect these recommendations. They also authorized establishing a multi-agency bacteria TMDL work group to examine the research and development needs identified in the task force report. Both TCEQ...

  5. Lighting Options for Homes.

    SciTech Connect (OSTI)

    Baker, W.S.

    1991-04-01T23:59:59.000Z

    This report covers many aspects of various lighting options for homes. Types of light sources described include natural light, artificial light, incandescent lamps, fluorescent lamps, and high intensity discharge lamps. A light source selection guide gives the physical characteristics of these, design considerations, and common applications. Color, strategies for efficient lighting, and types of lighting are discussed. There is one section giving tips for various situations in specific rooms. Rooms and types of fixtures are shown on a matrix with watts saved by using the recommended type lighting for that room and room location. A major emphasis of this report is saving energy by utilizing the most suitable, recommended lighting option. (BN)

  6. Mobile lighting apparatus

    DOE Patents [OSTI]

    Roe, George Michael; Klebanoff, Leonard Elliott; Rea, Gerald W; Drake, Robert A; Johnson, Terry A; Wingert, Steven John; Damberger, Thomas A; Skradski, Thomas J; Radley, Christopher James; Oros, James M; Schuttinger, Paul G; Grupp, David J; Prey, Stephen Carl

    2013-05-14T23:59:59.000Z

    A mobile lighting apparatus includes a portable frame such as a moveable trailer or skid having a light tower thereon. The light tower is moveable from a stowed position to a deployed position. A hydrogen-powered fuel cell is located on the portable frame to provide electrical power to an array of the energy efficient lights located on the light tower.

  7. Light disappears rapidly (exponentially)

    E-Print Network [OSTI]

    Kudela, Raphael M.

    #12;#12;#12;#12;Light disappears rapidly (exponentially) with depth At the same time, the color of the light shifts #12;#12;#12;#12;· Euphotic zone ­ plentiful light ­ 0-100 m (about) · Dysphotic zone ­ very, very little light ­ 100-1000 m (about) · Aphotic zone ­ no light ­ below 1000 m #12;Sunlight in Water

  8. Aging and the vulnerability of speech to dual task demands

    E-Print Network [OSTI]

    Kemper, Susan; Schmalzried, RaLynn Cheri; Hoffman, Lesa; Herman, Ruth

    2010-12-01T23:59:59.000Z

    Tracking a digital pursuit rotor task was used to measure dual task costs of language production by young and older adults. Tracking performance by both groups was affected by dual task demands: time on target declined and ...

  9. New Light Sources for Tomorrow's Lighting Designs

    E-Print Network [OSTI]

    Krailo, D. A.

    can ever be saved on that monthly energy bill. During the past several years, many new light sources have been developed and introduced. These product introductions have not been limited to anyone lamp type, but instead may be found in fila ment..., fluorescent and high intensity discharge lamp families. Man , ufacturers of light sources have two basic goals for new product development. These goals are high efficiency lighting and improved colo'r rendering properties. High efficiency lighting may take...

  10. EK101 Engineering Light Smart Lighting

    E-Print Network [OSTI]

    Bifano, Thomas

    EK101 Engineering Light Smart Lighting Homework for 9/10 1. Make an estimate (using if the patent is granted.) 3. What is a lumen? A lux? How are the two related? How would you use a lux meter, (Lux, Lumens/m2) Luminous Flux: Perceivable light power from a source, (Lumens) Use the lux meter

  11. Sandia National Laboratories: NM Renewable Energy Storage Task...

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

    Renewable Energy Storage Task Force New Mexico Renewable Energy Storage Task Force On January 28, 2014, in Energy, Energy Storage, Energy Storage Systems, Infrastructure Security,...

  12. USAMP/NonDestructive Evaluation Steering Committee (Task Team...

    Energy Savers [EERE]

    USAMPNonDestructive Evaluation Steering Committee (Task Team) USAMPNonDestructive Evaluation Steering Committee (Task Team) Presentation from the U.S. DOE Office of Vehicle...

  13. Descriptions of Task Order Schedules and Placement of Pricing...

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

    10112007 ATTACHMENT J-5 DESCRIPTIONS OF TASK ORDER SCHEDULES AND PLACEMENT OF PRICING INFORMATION J-5.1 DESCRIPTIONS OF TASK ORDER (TO) SCHEDULES (SCHEDULE TEMPLATES...

  14. Scheduling the Tasks of Two Agents with a Central Selection ...

    E-Print Network [OSTI]

    2014-06-16T23:59:59.000Z

    performance measure which only depends on its tasks completion times. Although ...... order as well and wins the following n?1 rounds with tasks a1 to an

  15. Federal Task Force Sends Recommendations to President on Fostering...

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

    Task Force Sends Recommendations to President on Fostering Clean Coal Technology Federal Task Force Sends Recommendations to President on Fostering Clean Coal Technology August 12,...

  16. area sheet task: Topics by E-print Network

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

    problem- dependent. For example, in the trash collection task Stone, Peter 5 A Multi-Robot System for Continuous Area Sweeping Tasks Computer Technologies and Information...

  17. Collaborative Utility Task Force Partners with DOE to Develop...

    Energy Savers [EERE]

    Collaborative Utility Task Force Partners with DOE to Develop Cyber Security Requirements for Advanced Metering Infrastructure Collaborative Utility Task Force Partners with DOE to...

  18. Electromagnetic modeling of the energy distribution of a metallic cylindrical parabolic reflector covered with a magnetized plasma layer

    SciTech Connect (OSTI)

    Niknam, A. R., E-mail: a-niknam@sbu.ac.ir; Khajehmirzaei, M. R. [Laser and Plasma Research Institute, Shahid Beheshti University, GC, Tehran (Iran, Islamic Republic of); Davoudi-Rahaghi, B.; Rahmani, Z.; Jazi, B.; Abdoli-Arani, A. [Department of Laser and Photonics, Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of)

    2014-07-15T23:59:59.000Z

    The energy distribution along the focal axis of a long metallic cylindrical parabolic reflector with a plasma layer on its surface in the presence of an external magnetic field is investigated. The effects of some physical parameters, such as the plasma frequency, the wave frequency and the thickness of plasma layer on the energy distribution and the reflected and transmitted electromagnetic fields, are simulated. These investigations for both S- and P-polarizations have been done separately. It is found that the maximum value of the reflected intensity increases by increasing the incident wave frequency and by decreasing the plasma layer thickness and the plasma frequency for both polarizations. Furthermore, the results show that the increase of the magnetic field strength can cause an increase in the reflected intensity for S-polarization and a slight decrease for P-polarization.

  19. Efficient proton acceleration and focusing by an ultraintense laser interacting with a parabolic double concave target with an extended rear

    SciTech Connect (OSTI)

    Bake, Muhammad Ali; Xie, Bai-Song; Aimidula, Aimierding [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China)] [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Wang, Hong-Yu [Department of Physics, Anshan Normal University, Anshan 114005 (China) [Department of Physics, Anshan Normal University, Anshan 114005 (China); Shanghai Bright-Tech Information Technology Co. Ltd., Shanghai 200136 (China)

    2013-07-15T23:59:59.000Z

    A new scheme for acceleration and focusing of protons via an improved parabolic double concave target irradiated by an ultraintense laser pulse is proposed. When an intense laser pulse illuminates a concave target, the hot electrons are concentrated on the focal region of the rear cavity and they form a strong space-charge-separation field, which accelerates the protons. For a simple concave target, the proton energy spectrum becomes very broad outside the rear cavity because of transverse divergence of the electromagnetic fields. However, particle-in-cell simulations show that, when the concave target has an extended rear, the hot electrons along the wall surface induce a transverse focusing sheath field, resulting in a clear enhancement of proton focusing, which makes the lower proton energy spread, while, leads to a little reduction of the proton bunch peak energy.

  20. Specific light in sculpture

    E-Print Network [OSTI]

    Powell, John William

    1989-01-01T23:59:59.000Z

    Specific light is defined as light from artificial or altered natural sources. The use and manipulation of light in three dimensional sculptural work is discussed in an historic and contemporary context. The author's work ...

  1. Variation of the Light and Period of the Magnetic Cataclysmic Variable Am Her

    E-Print Network [OSTI]

    Belinda Kalomeni; Kadri Yakut

    2008-11-04T23:59:59.000Z

    Ground-based long-term optic variability of AM Her, covering the period between 2003-2008, has been conducted to study the features seen in both low and high states of the system. Low-state analysis shows the presence of short-term, low-amplitude light variations of about 0.02-0.03 mag with a mean power time between 16 s and 226 s. Brightness variations on the order of 0.7--2 mag, which could be due to the stellar activity of the component in the system, are also detected. A total of 30 years times of minimum light given in the literature are combined with nine times of minima obtained in this study. We represented the (observed--calculated) diagram by a parabolic curve and also by two broken lines. Under the assumption of a parabolic variation, we estimate an increase in period, dP/dt=7.5(1.2)x10^{-9} days yr^{-1}, with a mass transfer rate of dM/dt = 8(2)x10^{-9} M_{\\odot} yr^{-1}, in agreement with the previous findings by a different method.

  2. Light Duty Combustion Research: Advanced Light-Duty Combustion...

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

    Light Duty Combustion Research: Advanced Light-Duty Combustion Experiments Light Duty Combustion Research: Advanced Light-Duty Combustion Experiments 2009 DOE Hydrogen Program and...

  3. Exciting White Lighting

    Broader source: Energy.gov [DOE]

    Windows that emit light and are more energy efficient? Universal Display’s PHOLED technology enables windows that have transparent light-emitting diodes in them.

  4. Simulating Billion-Task Parallel Programs

    SciTech Connect (OSTI)

    Perumalla, Kalyan S [ORNL] [ORNL; Park, Alfred J [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    In simulating large parallel systems, bottom-up approaches exercise detailed hardware models with effects from simplified software models or traces, whereas top-down approaches evaluate the timing and functionality of detailed software models over coarse hardware models. Here, we focus on the top-down approach and significantly advance the scale of the simulated parallel programs. Via the direct execution technique combined with parallel discrete event simulation, we stretch the limits of the top-down approach by simulating message passing interface (MPI) programs with millions of tasks. Using a timing-validated benchmark application, a proof-of-concept scaling level is achieved to over 0.22 billion virtual MPI processes on 216,000 cores of a Cray XT5 supercomputer, representing one of the largest direct execution simulations to date, combined with a multiplexing ratio of 1024 simulated tasks per real task.

  5. PFP Emergency Lighting Study

    SciTech Connect (OSTI)

    BUSCH, M.S.

    2000-02-02T23:59:59.000Z

    NFPA 101, section 5-9 mandates that, where required by building classification, all designated emergency egress routes be provided with adequate emergency lighting in the event of a normal lighting outage. Emergency lighting is to be arranged so that egress routes are illuminated to an average of 1.0 footcandle with a minimum at any point of 0.1 footcandle, as measured at floor level. These levels are permitted to drop to 60% of their original value over the required 90 minute emergency lighting duration after a power outage. The Plutonium Finishing Plant (PFP) has two designations for battery powered egress lights ''Emergency Lights'' are those battery powered lights required by NFPA 101 to provide lighting along officially designated egress routes in those buildings meeting the correct occupancy requirements. Emergency Lights are maintained on a monthly basis by procedure ZSR-12N-001. ''Backup Lights'' are battery powered lights not required by NFPA, but installed in areas where additional light may be needed. The Backup Light locations were identified by PFP Safety and Engineering based on several factors. (1) General occupancy and type of work in the area. Areas occupied briefly during a shiftly surveillance do not require backup lighting while a room occupied fairly frequently or for significant lengths of time will need one or two Backup lights to provide general illumination of the egress points. (2) Complexity of the egress routes. Office spaces with a standard hallway/room configuration will not require Backup Lights while a large room with several subdivisions or irregularly placed rooms, doors, and equipment will require Backup Lights to make egress safer. (3) Reasonable balance between the safety benefits of additional lighting and the man-hours/exposure required for periodic light maintenance. In some plant areas such as building 236-Z, the additional maintenance time and risk of contamination do not warrant having Backup Lights installed in all rooms. Sufficient light for egress is provided by existing lights located in the hallways.

  6. FAQS Job Task Analyses- DOE Aviation Safety Officer

    Broader source: Energy.gov [DOE]

    FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

  7. FAQS Job Task Analyses- Confinement Ventilation and Process Gas Treatment

    Broader source: Energy.gov [DOE]

    FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

  8. FAQS Job Task Analyses- Nuclear Explosive Safety Study

    Broader source: Energy.gov [DOE]

    FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

  9. Columbia University Network Integration Task Force

    E-Print Network [OSTI]

    Yang, Junfeng

    Columbia University Network Integration Task Force Final Report II 30 January 1992 #12;1 TOWARDS A COMMON ADMINISTRATIVE AND ACADEMIC NETWORK AT COLUMBIA UNIVERSITY Columbia University's Administrative or terminal. 1.2. Executive Summary This report examines Columbia University's current academic

  10. Hierarchical Task Analysis of Intrusion Detection Systems

    E-Print Network [OSTI]

    Blustein, J.

    .......................... 4 3. Hierarchical Task Analysis ............................ 6 3.1 Network Security Administrator .................... 7 3.2 Functions of Network Security Administrator ....... 7 4. Diagrams on a single or group of persons called Network Security Administrators. They use a wide variety of tools

  11. Academic Integrity Task Force Report Executive Summary

    E-Print Network [OSTI]

    Roy, Subrata

    . For a more comprehensive report of the findings as well as faculty suggestions for maintaining integrity1 Academic Integrity Task Force Report Executive Summary 11/22/11 INTRODUCTION CHARGE: To determine whether there is an issue with academic integrity at UF and, if so, to determine how widespread

  12. Dean's Task Force on Engineering Leadership

    E-Print Network [OSTI]

    Dean's Task Force on Engineering Leadership Education Final Report May 5, 2010 Doug Reeve (Chair, Membership 1. There is an Urgent Need for Engineering Le 2. Leadership Education ...8 Engineering Leaders. Capability and Compe Engineering Leadership 5 Curriculum Concepts Co-curricular Concepts Extra

  13. ANINTEGERPROGRAMMINGMODELFORASSIGNING UNMANNED AIR VEHICLES TO TASKS

    E-Print Network [OSTI]

    Nygard, Kendall E.

    the mission. An integer linear program is posed for assembling the vehicles into sub-teams. The model as a generalization of a linear network model presented in [Nygard et. al.], which is limited to the assignment is allowed. #12;An Integer Programming Model for Assigning Unmanned Air Vehicles to Tasks 3 The model

  14. Open Access Task Force Open Access to

    E-Print Network [OSTI]

    Jiang, Huiqiang

    Libraries Initiative launched by National Science Foundation; Social Sciences Research Network (SSRN Library System rgmiller@pitt.edu #12;Open Access Task Force Open Access is... · A family of copyright · The only constraint on reproduction and distribution, and the only role for copyright in this domain

  15. Lighting and Daylight Harvesting

    E-Print Network [OSTI]

    Bos, J.

    2011-01-01T23:59:59.000Z

    exposing us to the latest products and technologies. Daylight Harvesting A system of controlling the direction and the quantity of light both natural and artificial within a given space. This implies: Control of fenestration in terms of size..., transmission and direction. Control of reflected light within a space. Control of electric light in terms of delivery and amount Daylight harvesting systems are typically designed to maintain a minimum recommended light level. This light level...

  16. EK101 Engineering Light Project: Evaluate Residential Lighting

    E-Print Network [OSTI]

    Bifano, Thomas

    EK101 Engineering Light Project: Evaluate Residential Lighting Compare technical and economic characteristics of three sources of residential light. Two teams of four complete the same project Engineering Light Project: Evaluate Residential Lighting Project Assignment: Evaluate current options

  17. Deficiencies of Lighting Codes and Ordinances in Controlling Light Pollution from Parking Lot Lighting Installations

    E-Print Network [OSTI]

    Royal, Emily

    2012-05-31T23:59:59.000Z

    The purpose of this research was to identify the main causes of light pollution from parking lot electric lighting installations and highlight the deficiencies of lighting ordinances in preventing light pollution. Using an industry-accepted lighting...

  18. Energy Efficiency Through Lighting Upgrades

    SciTech Connect (OSTI)

    Kara Berst; Maria Howeth

    2010-06-01T23:59:59.000Z

    Lighting upgrades including neon to LED, incandescent to CFL's and T-12 to T-8 and T-5's were completed through this grant. A total of 16 Chickasaw nation facilities decreased their carbon footprint because of these grant funds. Calculations used were based on comparing the energy usage from the previous year�¢����s average and the current energy usage. For facilities without a full year's set of energy bills, the month after installation was compared to the same month from the previous year. Overall, the effect the lighting change-outs had for the gaming centers and casinos far exceeded expectations. For the Madill Gaming Center; both an interior and exterior upgrade was performed which resulted in a 31% decrease in energy consumption. This same reduction was seen in every facility that participated in the grant. Just by simply changing out light bulbs to newer energy efficient equivalents, a decrease in energy usage can be achieved and this was validated by the return on investment seen at Chickasaw Nation facilities. Along with the technical project tasks were awareness sessions presented at Chickasaw Head Starts. The positive message of environmental stewardship was passed down to head start students and passed along to Chickasaw employees. Excitement was created in those that learned what they could do to help reduce their energy bills and many followed through and took the idea home. For a fairy low cost, the general public can also use this technique to lower their energy consumption both at home and at work. Although the idea behind the project was somewhat simple, true benefits have been gained through environmental awareness and reductions of energy costs.

  19. OpenGL Lighting 13. OpenGL Lighting

    E-Print Network [OSTI]

    McDowell, Perry

    OpenGL Lighting 13. OpenGL Lighting · Overview of Lighting in OpenGL In order for lighting to have an effect in OpenGL, two things are required: A light An object to be lit Lights can be set to any color determine how they reflect the light which hits them. The color(s) of an object is determined

  20. Life Cycle Assessment of a Parabolic Trough Concentrating Solar Power Plant and Impacts of Key Design Alternatives: Preprint

    SciTech Connect (OSTI)

    Heath, G. A.; Burkhardt, J. J.; Turchi, C. S.

    2011-09-01T23:59:59.000Z

    Climate change and water scarcity are important issues for today's power sector. To inform capacity expansion decisions, hybrid life cycle assessment is used to evaluate a reference design of a parabolic trough concentrating solar power (CSP) facility located in Daggett, California, along four sustainability metrics: life cycle greenhouse gas (GHG) emissions, water consumption, cumulative energy demand (CED), and energy payback time (EPBT). This wet-cooled, 103 MW plant utilizes mined nitrate salts in its two-tank, thermal energy storage (TES) system. Design alternatives of dry-cooling, a thermocline TES, and synthetically-derived nitrate salt are evaluated. During its life cycle, the reference CSP plant is estimated to emit 26 g CO2eq per kWh, consume 4.7 L/kWh of water, and demand 0.40 MJeq/kWh of energy, resulting in an EPBT of approximately 1 year. The dry-cooled alternative is estimated to reduce life cycle water consumption by 77% but increase life cycle GHG emissions and CED by 8%. Synthetic nitrate salts may increase life cycle GHG emissions by 52% compared to mined. Switching from two-tank to thermocline TES configuration reduces life cycle GHG emissions, most significantly for plants using synthetically-derived nitrate salts. CSP can significantly reduce GHG emissions compared to fossil-fueled generation; however, dry-cooling may be required in many locations to minimize water consumption.

  1. Test of the adequacy of using smoothly joined parabolic segments to parametrize the multihumped fission barriers in actinides

    SciTech Connect (OSTI)

    Bhandari, B.S. (Department of Physics, Faculty of Science, University of Garyounis, Benghazi (Libya))

    1990-10-01T23:59:59.000Z

    The adequacy of using smoothly joined parabolic segments to parametrize the multihumped fission barriers has been tested by examining its simultaneous consistency with the three relevant fission observables, namely, the near-barrier fission cross sections, isomeric half-lives, and the ground-state spontaneous fission half-lives of a wide variety of a total of 25 actinide nuclides. The penetrabilities through such multihumped fission barriers have been calculated in the Wentzel-Kramers-Brillouin approximation, and the various fission half-lives have been determined using the formalism given earlier by Nix and Walker. The results of our systematic analysis of these actinide nuclides suggest that such a parametrization is quite adequate at least for the even-even nuclei, as it reproduces satisfactorily their various observed fission characteristics. Major difficulties remain, however, for the odd mass and for the doubly odd nuclei where the calculated ground-state spontaneous fission half-lives are found to be several orders of magnitude larger than those measured. Possible reasons for such discrepancies are discussed. Fission branching ratios of the decay of the shape isomers in various actinide nuclides have also been calculated and are compared with their measured values.

  2. Thermal Properties of a Particle Confined to a Parabolic Quantum Well in 2D Space with Conical Disclination

    E-Print Network [OSTI]

    Tridev Mishra; Tapomoy Guha Sarkar; Jayendra N. Bandyopadhyay

    2014-03-20T23:59:59.000Z

    The thermal properties of a system, comprising of a spinless non-interacting charged particle in the presence of a constant external magnetic field and confined in a parabolic quantum well are studied. The focus has been on the effects of a topological defect, of the form of conical disclination, with regard to the thermodynamic properties of the system. We have obtained the modifications to the traditional Landau-Fock-Darwin spectrum in the presence of conical disclination. The effect of the conical kink on the degeneracy structure of the energy levels is investigated. The canonical formalism is used to compute various thermodynamic variables. The study shows an interplay between magnetic field, temperature and the degree of conicity by setting two scales for temperature corresponding to the frequency of the confining potential and the cyclotron frequency of external magnetic field. The kink parameter is found to affect the quantitative behaviour of the thermodynamic quantities. It plays a crucial role in the competition between the external magnetic field and temperature in fixing the values of the thermal response functions. This study provides an important motivation for studying similar systems, however with non trivial interactions in the presence of topological defects.

  3. Adaptive Street Lighting Controls

    Broader source: Energy.gov [DOE]

    This two-part DOE Municipal Solid-State Street Lighting Consortium webinar focused on LED street lighting equipped with adaptive control components. In Part I, presenters Amy Olay of the City of...

  4. Sandia National Laboratories: Lighting

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

    Lighting Solid-State Lighting Science EFRC On November 11, 2010, in Welcome History of Incandescence History of LEDs Grand Challenges Our EFRC SSLS-EFRC Contacts News Publications...

  5. Light emitting device comprising phosphorescent materials for white light generation

    DOE Patents [OSTI]

    Thompson, Mark E.; Dapkus, P. Daniel

    2014-07-22T23:59:59.000Z

    The present invention relates to phosphors for energy downconversion of high energy light to generate a broadband light spectrum, which emit light of different emission wavelengths.

  6. Integration of Sensors with Embedded Data Acquisition for Automation of Lighting Analysis

    E-Print Network [OSTI]

    Terrill, T. J.; Bay, C. J.; Rasmussen, B. P.

    2014-01-01T23:59:59.000Z

    of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Overview -Overview of Energy Assessments -Autonomous Energy Audits -Lighting Assessment Identify and Analyze Lighting Lighting Simulation ESL-IE-14-05-41 Proceedings... Simple, Time- consuming Tasks Initial Capital Cost ESL-IE-14-05-41 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Autonomous Energy Auditors Ground and aerial vehicles autonomously navigate...

  7. Advanced Demand Responsive Lighting

    E-Print Network [OSTI]

    Advanced Demand Responsive Lighting Host: Francis Rubinstein Demand Response Research Center demand responsive lighting systems ­ Importance of dimming ­ New wireless controls technologies · Advanced Demand Responsive Lighting (commenced March 2007) #12;Objectives · Provide up-to-date information

  8. Light Rail Transit Strengthening

    E-Print Network [OSTI]

    Minnesota, University of

    Light Rail Transit Improving mobility Easing congestion Strengthening our communities Central Corridor Communicating to the Public During Major Construction May 25, 2011 #12;2 Light Rail Transit;Light Rail Transit Central Corridor Route and Stations 3 · 18 new stations · 9.8 miles of new double

  9. Efficient Light Extraction from Organic Light-Emitting Diodes Using Plasmonic Scattering Layers

    SciTech Connect (OSTI)

    Rothberg, Lewis

    2012-11-30T23:59:59.000Z

    Our project addressed the DOE MYPP 2020 goal to improve light extraction from organic light-emitting diodes (OLEDs) to 75% (Core task 6.3). As noted in the 2010 MYPP, “the greatest opportunity for improvement is in the extraction of light from [OLED] panels”. There are many approaches to avoiding waveguiding limitations intrinsic to the planar OLED structure including use of textured substrates, microcavity designs and incorporating scattering layers into the device structure. We have chosen to pursue scattering layers since it addresses the largest source of loss which is waveguiding in the OLED itself. Scattering layers also have the potential to be relatively robust to color, polarization and angular distributions. We note that this can be combined with textured or microlens decorated substrates to achieve additional enhancement.

  10. June 11, 2009, HSS/Union Task Meeting on 2009 HSS/Union Task Progress - Task Leads Schedule

    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't YourTransport(FactDepartment ofLetter Report: I11IG002RTC3 |Julian Wong21 st09/0905-09 TASK

  11. aapm task group: Topics by E-print Network

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

    High North 2000-01-01 4 Submission to the Prime Minister's Task Group on Emissions Trading in response to the Task Group's Issues Paper of February 2007 Environmental...

  12. DOE Awards Research and Systems Engineering Task Order | Department...

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

    Research and Systems Engineering Task Order DOE Awards Research and Systems Engineering Task Order March 28, 2013 - 12:00pm Addthis Media Contact Bill Taylor, 803-952-8564...

  13. REPORT OF THE TASK FORCE ON NUCLEAR NONPROLIFERATION

    Broader source: Energy.gov [DOE]

    The Secretary of Energy on December 20, 2013 established the Secretary of Energy Advisory Board (SEAB) Task Force on Nuclear Nonproliferation and charged the Task Force to advise the DOE on future areas of emphasis for its nuclear nonproliferation activities

  14. Transmission Services WIST Task Force Dynamic Transfer Capability...

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

    WIST Task Force Dynamic Transfer Capability Report - Phase I BPA is an active participant in the Wind Integration Study Team (WIST), especially the Task Force looking at DTC study...

  15. Integrated Robot Task and Motion Planning in the Now

    E-Print Network [OSTI]

    Kaelbling, Leslie Pack

    2012-06-29T23:59:59.000Z

    This paper provides an approach to integrating geometric motion planning with logical task planning for long-horizon tasks in domains with many objects. We propose a tight integration between the logical and geometric ...

  16. apha energy task: Topics by E-print Network

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

    15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 REPORT OF THE DARK ENERGY TASK FORCE Physics Websites Summary: REPORT OF THE DARK ENERGY TASK FORCE (DETF) Dark...

  17. Environmental research on a modified in situ oil shale task process. Progress report

    SciTech Connect (OSTI)

    Not Available

    1980-05-01T23:59:59.000Z

    This report summarizes the progress of the US Department of Energy's Oil Shale Task Force in its research program at the Occidental Oil Shale, Inc. facility at Logan Wash, Colorado. More specifically, the Task Force obtained samples from Retort 3E and Retort 6 and submitted these samples to a variety of analyses. The samples collected included: crude oil (Retort 6); light oil (Retort 6); product water (Retort 6); boiler blowdown (Retort 6); makeup water (Retort 6); mine sump water; groundwater; water from Retorts 1 through 5; retort gas (Retort 6); mine air; mine dust; and spent shale core (Retort 3E). The locations of the sampling points and methods used for collection and storage are discussed in Chapter 2 (Characterization). These samples were then distributed to the various laboratories and universities participating in the Task Force. For convenience in organizing the data, it is useful to group the work into three categories: Characterization, Leaching, and Health Effects. While many samples still have not been analyzed and much of the data remains to be interpreted, there are some preliminary conclusions the Task Force feels will be helpful in defining future needs and establishing priorities. It is important to note that drilling agents other than water were used in the recovery of the core from Retort 3E. These agents have been analyzed (see Table 12 in Chapter 2) for several constituents of interest. As a result some of the analyses of this core sample and leachates must be considered tentative.

  18. NREL Job Task Analysis: Retrofit Installer Technician (Revised)

    SciTech Connect (OSTI)

    Kurnik, C.; Woodley, C.

    2012-04-01T23:59:59.000Z

    A summary of job task analyses for the position of retrofit installer technician when conducting weatherization work on a residence.

  19. Light extraction from organic light-emitting diodes for lighting applications by sand-blasting

    E-Print Network [OSTI]

    Light extraction from organic light-emitting diodes for lighting applications by sand@ust.hk Abstract: Light extraction from organic light-emitting diodes (OLEDs) by scattering the light is one of the effective methods for large-area lighting applications. In this paper, we present a very simple and cost

  20. Photonic crystal light source

    DOE Patents [OSTI]

    Fleming, James G. (Albuquerque, NM); Lin, Shawn-Yu (Albuquerque, NM); Bur, James A. (Corrales, NM)

    2004-07-27T23:59:59.000Z

    A light source is provided by a photonic crystal having an enhanced photonic density-of-states over a band of frequencies and wherein at least one of the dielectric materials of the photonic crystal has a complex dielectric constant, thereby producing enhanced light emission at the band of frequencies when the photonic crystal is heated. The dielectric material can be a metal, such as tungsten. The spectral properties of the light source can be easily tuned by modification of the photonic crystal structure and materials. The photonic crystal light source can be heated electrically or other heating means. The light source can further include additional photonic crystals that exhibit enhanced light emission at a different band of frequencies to provide for color mixing. The photonic crystal light source may have applications in optical telecommunications, information displays, energy conversion, sensors, and other optical applications.

  1. ERROR VISUALIZATION FOR TANDEM ACOUSTIC MODELING ON THE AURORA TASK

    E-Print Network [OSTI]

    Ellis, Dan

    ERROR VISUALIZATION FOR TANDEM ACOUSTIC MODELING ON THE AURORA TASK Manuel J. Reyes. This structure reduces the error rate on the Aurora 2 noisy English digits task by more than 50% compared development of tandem systems showed an improvement in the performance on the Aurora task [2] of these systems

  2. Human versus Machine in the Topic Distillation Task Mingfang Wu

    E-Print Network [OSTI]

    Wu, Mingfang

    Human versus Machine in the Topic Distillation Task Mingfang Wu 1 , Gheorghe Muresan2 , Alistair Mc. The focus is on comparing humans and machine algorithms in terms of performance in a topic distillation task demonstrated that machines can perform nearly as well as people on the topic distillation task. Given a system

  3. Collaborative Construction of Task Activity: Coordinating Multiple Resources in a

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Collaborative Construction of Task Activity: Coordinating Multiple Resources in a High School of the moment-to- moment construction of task, this study draws attention to complex yet taken-for- granted connections, knowing how to collaboratively construct a task. This article documents the collaborative

  4. TASK PLAN: Tribal Issues Topic Group

    Office of Environmental Management (EM)

    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: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2Uranium Transferon the Passing ofDepartmentRenewableArbitrary Code46:updateTask

  5. Foundations and Light Compass Foundations and Light Compass

    E-Print Network [OSTI]

    Wong, Jennifer L.

    Foundations and Light Compass Case Study Foundations and Light Compass Case Study Jennifer L. WongQuantitative Sensor--centric Designcentric Design Light CompassLight Compass ­­ Models and Abstractions Contaminant Transport Marine Microorganisms Ecosystems, Biocomplexity What is a Light Compass?What is a Light

  6. Lighting and Surfaces 11.1 Introduction to Lighting

    E-Print Network [OSTI]

    Boyd, John P.

    Chapter 11 Lighting and Surfaces 11.1 Introduction to Lighting Three-dimensional surfaces can react to light, and how computer graphics simulates this. There are three species of light (or "illumination models"): 1. Intrinsic (self-emitting) 2. Ambient light (sometimes called "diffuse light") 3

  7. Measurement of coherence length and incoherent source size of hard x-ray undulator beamline at Pohang Light Source-II

    SciTech Connect (OSTI)

    Park, So Yeong; Hong, Chung Ki [Department of Physics, POSTECH, Pohang 790-784 (Korea, Republic of)] [Department of Physics, POSTECH, Pohang 790-784 (Korea, Republic of); Lim, Jun, E-mail: limjun@postech.ac.kr [Pohang Accelerator Laboratory, POSTECH, Pohang 790-784 (Korea, Republic of)] [Pohang Accelerator Laboratory, POSTECH, Pohang 790-784 (Korea, Republic of)

    2014-04-15T23:59:59.000Z

    We measured the spatial coherence length and incoherent source size of a hard x-ray undulator beamline at Pohang Light Source-II, the stored electron energy of which has been increased from 2.5 GeV to 3 GeV. The coherence length was determined by single-slit measurement of the visibility of the Fresnel diffraction pattern. The correlated incoherent source size was cross-checked for three different optics: the single slit, beryllium parabolic compound refractive lenses, and the Fresnel zone plate. We concluded that the undulator beamline has an effective incoherent source size (FWHM) of 540 ?m (horizontal) × 50 ?m (vertical)

  8. Backward Inhibition as a Means of Sequential Task-Set Control: Evidence for Reduction of Task Competition

    E-Print Network [OSTI]

    Schubart, Christoph

    is not free from behavioral costs. In the extreme, people consistently fall short in implement- ing a new taskBackward Inhibition as a Means of Sequential Task-Set Control: Evidence for Reduction of Task Haider Universita¨t zu Ko¨ln Rainer H. Kluwe Universita¨t der Bundeswehr Hamburg Endogenously initiated

  9. High efficiency incandescent lighting

    DOE Patents [OSTI]

    Bermel, Peter; Ilic, Ognjen; Chan, Walker R.; Musabeyoglu, Ahmet; Cukierman, Aviv Ruben; Harradon, Michael Robert; Celanovic, Ivan; Soljacic, Marin

    2014-09-02T23:59:59.000Z

    Incandescent lighting structure. The structure includes a thermal emitter that can, but does not have to, include a first photonic crystal on its surface to tailor thermal emission coupled to, in a high-view-factor geometry, a second photonic filter selected to reflect infrared radiation back to the emitter while passing visible light. This structure is highly efficient as compared to standard incandescent light bulbs.

  10. National Synchrotron Light Source

    ScienceCinema (OSTI)

    BNL

    2009-09-01T23:59:59.000Z

    A tour of Brookhaven's National Synchrotron Light Source (NSLS), hosted by Associate Laboratory Director for Light Sources, Stephen Dierker. The NSLS is one of the world's most widely used scientific research facilities, hosting more than 2,500 guest researchers each year. The NSLS provides intense beams of infrared, ultraviolet, and x-ray light for basic and applied research in physics, chemistry, medicine, geophysics, environmental, and materials sciences.

  11. LED Lighting Retrofit

    E-Print Network [OSTI]

    Shaw-Meadow, N.

    2011-01-01T23:59:59.000Z

    ? Municipal Street Lighting Consortium ? American Public Power Association (APPA) ? Demonstration in Energy Efficiency Development (DEED) ? Source of funding and database of completed LED roadway projects 6 Rules of the Road ESL-KT-11-11-57 CATEE 2011..., 2011 ? 9 Solar-Assisted LED Case Study LaQuinta Hotel, Cedar Park, Texas ? Utilizes 18 - ActiveLED Solar-Assisted Parking Lot Lights ? Utilizes ?power management? to extend battery life while handling light output ? Reduces load which reduces PV...

  12. Edmund G. Brown Jr. LIGHTING CALIFORNIA'S FUTURE

    E-Print Network [OSTI]

    Edmund G. Brown Jr. Governor LIGHTING CALIFORNIA'S FUTURE: SMART LIGHT-EMITTING DIODE LIGHTING's Future: Smart LightEmitting Diode Lighting in Residential Fans. California Energy Commission, PIER

  13. Comparing Light Bulbs

    Broader source: Energy.gov [DOE]

    In this exercise, students will use a light to demonstrate the difference between being energy-efficient and energy-wasteful, and learn what energy efficiency means.

  14. Total Light Management

    Broader source: Energy.gov [DOE]

    Presentation covers total light management, and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

  15. Lighting Technology Panel

    Broader source: Energy.gov [DOE]

    Presentation covers the Lighting Technology Panel for the Federal Utility Partnership Working Group (FUPWG) meeting, held on November 18-19, 2009. 

  16. 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.

  17. Solid-State Lighting

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

    into the market. On the market side, DOE works closely with drivers, heat sinks, and optics. LEDs must be carefully energy efficiency program partners, lighting professionals,...

  18. Ventilation efficiencies of a desk-edge-mounted task ventilation system

    E-Print Network [OSTI]

    Faulkner, David; Fisk, William J.; Sullivan, Douglas P.; Lee, Seung Min

    2002-01-01T23:59:59.000Z

    DESK-EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner * , WJthe effectiveness of a task ventilation system with an airthe desk. The task ventilation system provided outside air,

  19. Energy and task management in energy harvesting wireless sensor networks for structural health monitoring

    E-Print Network [OSTI]

    Steck, Jamie Bradley

    2009-01-01T23:59:59.000Z

    Chapter 4. System Energy and Task Management . . 1. System2. Energy and Task Management Algorithms A. Energy3. Energy and Task Management Algorithms A. Energy

  20. Task force reduces stuck-pipe costs

    SciTech Connect (OSTI)

    Bradley, W.B. (BP Research, Houston, TX (US)); Jarman, D. (BP Exploration Operation Co., Aberdeen (GB)); Auflick, R.A.; Plott, R.S. (BP Exploration Operating Co., Houston, TX (US)); Wood, R.D. (BP Exploration Operating Co., London (GB)); Schofield, T.R. (BP Exploration Operating Co., Beijing (CN)); Cocking, D. (BP Exploration Operating Co., Ho Chi Minh City (CN))

    1991-05-27T23:59:59.000Z

    A task-force approach to stuck pipe has produced more than a 70% reduction in BP Exploration Operating Co.'s worldwide stuck-pipe costs during 1989 and 1990. We believe that these results have been primarily due to focusing our attention on improving personnel performance rather than to the introduction of new technology. Key elements in this paper of the efforts involved: Recognizing the importance of the drilling contractor and the service company staff's role in helping control stuck pipe; Promoting a rig-team approach to tackling the problem; Providing training on rig-team, stuck-pipe problem solving; and raising awareness of stuck pipe through a coordinated worldwide communications program among BP, contractors, and service companies.

  1. Task 8.9 - Advanced ceramic materials

    SciTech Connect (OSTI)

    NONE

    1997-06-30T23:59:59.000Z

    Advanced ceramic materials such as Continuous Fiber Reinforced Ceramic Matrix Composites (CFCCs) have had promising results on the companion program entitled ``Ceramic Stationary Gas Turbine`` (CSGT). In particular, CFCCs have outperformed monolithic tiles in structural integrity as a combustor liner. Also, CFCCs have provided the higher temperature operation and improved emissions performance that is required for the ATS combustor. The demonstrated advantages on CSGT justified work to explore the use of advanced ceramic composite materials in other gas turbine components. Sub-tasks include development of a practical, cost effective component fabrication process, development of finite element stress analysis to assure 30,000 hours of component life, and fabrication of a demonstration article.

  2. Highly efficient light management for perovskite solar cells

    E-Print Network [OSTI]

    Wang, Dong-Lin; Hou, Guo-Jiao; Zhu, Zhen-Gang; Yan, Qing-Bo; Su, Gang

    2015-01-01T23:59:59.000Z

    Organic-inorganic halide perovskite solar cells have enormous potential to impact the existing photovoltaic industry. As realizing a higher conversion efficiency of the solar cell is still the most crucial task, a great number of schemes were proposed to minimize the carrier loss by optimizing the electrical properties of the perovskite solar cells. Here, we focus on another significant aspect that is to minimize the light loss by optimizing the light management to gain a high efficiency for perovskite solar cells. In our scheme, the slotted and inverted prism structured SiO2 layers are adopted to trap more light into the solar cells, and a better transparent conducting oxide layer is employed to reduce the parasitic absorption. For such an implementation, the efficiency and the serviceable angle of the perovskite solar cell can be promoted impressively. This proposal would shed new light on developing the high-performance perovskite solar cells.

  3. TRU drum corrosion task team report

    SciTech Connect (OSTI)

    Kooda, K.E.; Lavery, C.A.; Zeek, D.P.

    1996-05-01T23:59:59.000Z

    During routine inspections in March 1996, transuranic (TRU) waste drums stored at the Radioactive Waste Management Complex (RWMC) were found with pinholes and leaking fluid. These drums were overpacked, and further inspection discovered over 200 drums with similar corrosion. A task team was assigned to investigate the problem with four specific objectives: to identify any other drums in RWMC TRU storage with pinhole corrosion; to evaluate the adequacy of the RWMC inspection process; to determine the precise mechanism(s) generating the pinhole drum corrosion; and to assess the implications of this event for WIPP certifiability of waste drums. The task team investigations analyzed the source of the pinholes to be Hcl-induced localized pitting corrosion. Hcl formation is directly related to the polychlorinated hydrocarbon volatile organic compounds (VOCs) in the waste. Most of the drums showing pinhole corrosion are from Content Code-003 (CC-003) because they contain the highest amounts of polychlorinated VOCs as determined by headspace gas analysis. CC-001 drums represent the only other content code with a significant number of pinhole corrosion drums because their headspace gas VOC content, although significantly less than CC-003, is far greater than that of the other content codes. The exact mechanisms of Hcl formation could not be determined, but radiolytic and reductive dechlorination and direct reduction of halocarbons were analyzed as the likely operable reactions. The team considered the entire range of feasible options, ranked and prioritized the alternatives, and recommended the optimal solution that maximizes protection of worker and public safety while minimizing impacts on RWMC and TRU program operations.

  4. Sustainable LED Fluorescent Light Replacement Technology

    SciTech Connect (OSTI)

    None

    2011-06-30T23:59:59.000Z

    Ilumisys and the National Center for Manufacturing Sciences (NCMS) partnered on a three-year project awarded by the United States (U.S.) Department of Energy (DOE), to quantify the impacts of LED lamps, incandescent lamps and fluorescent benchmark lamps over a product lifecycle – i.e. to develop a sustainable design and manufacturing strategy that addresses product manufacturing, use, recycling and disposal scenarios for LED-based lighting. Based on the knowledge gained from extensive product tear-down studies of fluorescent and screw-in lighting products, lifecycle assessment tools, and accelerated lifecycle testing protocols, an interactive Sustainable LED Design Guide has been developed to aid architectural and lighting designers and engineers in making design decisions that consider three important environmental impacts (greenhouse gas emissions, energy use and mercury emission) across all phases of the life of an LED lighting product. Critical information developed for the lifecycle analysis and product feature comparisons is the useful life of the lighting product as well as its performance. The Design Guide is available at www.ncms.org, and was developed based on operational and durability testing of a variety of lighting products including power consumption, light output, and useful life of a lamp in order to allow a more realistic comparison of lamp designs. This report describes the main project tasks, results and innovative features of the lifecycle assessment (LCA)-based design tools, and the key considerations driving the sustainable design of LED lighting systems. The Design Guide incorporates the following three novel features for efficiently evaluating LED lighting features in value-chains: • Bill-of-Materials (BOM) Builder – Designers may import process data for each component and supply functional data for the product, including power, consumption, lumen output and expected useful life. • Environmental Impact Review – Designs are comparable across lifecycle phases, subsystems, and environmental impact category, and can be normalized to a userdefined functional unit. • Drill-down Review – These provide an indepth look at individual lamp designs with the ability to review across subsystem or lifecycle phase.

  5. Reducing home lighting expenses

    SciTech Connect (OSTI)

    Aimone, M.A.

    1981-02-01T23:59:59.000Z

    Ways to reduce lighting expenses are summarized. These include: turning off lights when not in use; keeping fixtures and lamps clean; replacing lamps with more efficient types; using three-way bulbs; use of daylighting; buying fewer lamps and reducing lamp wattage; consider repainting rooms; replacing recessed fixtures with tracklighting; and using efficient lamps for outdoor use. (MCW)

  6. Explosively pumped laser light

    DOE Patents [OSTI]

    Piltch, Martin S. (Los Alamos, NM); Michelotti, Roy A. (Los Alamos, NM)

    1991-01-01T23:59:59.000Z

    A single shot laser pumped by detonation of an explosive in a shell casing. The shock wave from detonation of the explosive causes a rare gas to luminesce. The high intensity light from the gas enters a lasing medium, which thereafter outputs a pulse of laser light to disable optical sensors and personnel.

  7. Light intensity compressor

    DOE Patents [OSTI]

    Rushford, Michael C. (Livermore, CA)

    1990-01-01T23:59:59.000Z

    In a system for recording images having vastly differing light intensities over the face of the image, a light intensity compressor is provided that utilizes the properties of twisted nematic liquid crystals to compress the image intensity. A photoconductor or photodiode material that is responsive to the wavelength of radiation being recorded is placed adjacent a layer of twisted nematic liquid crystal material. An electric potential applied to a pair of electrodes that are disposed outside of the liquid crystal/photoconductor arrangement to provide an electric field in the vicinity of the liquid crystal material. The electrodes are substantially transparent to the form of radiation being recorded. A pair of crossed polarizers are provided on opposite sides of the liquid crystal. The front polarizer linearly polarizes the light, while the back polarizer cooperates with the front polarizer and the liquid crystal material to compress the intensity of a viewed scene. Light incident upon the intensity compressor activates the photoconductor in proportion to the intensity of the light, thereby varying the field applied to the liquid crystal. The increased field causes the liquid crystal to have less of a twisting effect on the incident linearly polarized light, which will cause an increased percentage of the light to be absorbed by the back polarizer. The intensity of an image may be compressed by forming an image on the light intensity compressor.

  8. Evaluation of Alternative Field Buses for Lighting ControlApplications

    SciTech Connect (OSTI)

    Koch, Ed; Rubinstein, Francis

    2005-03-21T23:59:59.000Z

    The Subcontract Statement of Work consists of two major tasks. This report is the Final Report in fulfillment of the contract deliverable for Task 1. The purpose of Task 1 was to evaluate existing and emerging protocols and standards for interfacing sensors and controllers for communicating with integrated lighting control systems in commercial buildings. The detailed task description follows: Task 1. Evaluate alternative sensor/field buses. The objective of this task is to evaluate existing and emerging standards for interfacing sensors and controllers for communicating with integrated lighting control systems in commercial buildings. The protocols to be evaluated will include at least: (1) 1-Wire Net, (2) DALI, (3) MODBUS (or appropriate substitute such as EIB) and (4) ZigBee. The evaluation will include a comparative matrix for comparing the technical performance features of the different alternative systems. The performance features to be considered include: (1) directionality and network speed, (2) error control, (3) latency times, (4) allowable cable voltage drop, (5) topology, and (6) polarization. Specifically, Subcontractor will: (1) Analyze the proposed network architecture and identify potential problems that may require further research and specification. (2) Help identify and specify additional software and hardware components that may be required for the communications network to operate properly. (3) Identify areas of the architecture that can benefit from existing standards and technology and enumerate those standards and technologies. (4) Identify existing companies that may have relevant technology that can be applied to this research. (5) Help determine if new standards or technologies need to be developed.

  9. Improving the performance of photo-electrically controlled lighting systems

    SciTech Connect (OSTI)

    Rubinstein, F.; Ward, G.; Verderber, R.

    1988-08-01T23:59:59.000Z

    The ability of a photo-electrically controlled lighting system to maintain a constant total light level on a task surface by responding to changing daylight levels is affected by the control algorithm used to relate the photosensor signal to the supplied electric light level and by the placement and geometry of the photosensor. We describe the major components of a typical control system, discuss the operation of three different control algorithms, and derive expressions for each algorithm that express the total illuminance at the task as a function of the control photosensor signal. Using a specially-designed scale model, we measured the relationship between the signal generated by various ceiling-mounted control photosensors and workplane illuminance for two room geometries under real sky conditions. The measured data were used to determine the performance of systems obeying the three control algorithms under varying daylight conditions. Control systems employing the commonly-used integral reset algorithm supplied less electric light than required, failing to satisfy the control objective regardless of the control photosensor used. Systems employing an alternative, closed-loop proportional control algorithm achieved the control objective under virtually all tested conditions when operated by a ceiling-mounted photosensor shielded from direct window light.

  10. Lighting affects appearance LightSource emits photons

    E-Print Network [OSTI]

    Jacobs, David

    1 Lighting affects appearance #12;2 LightSource emits photons Photons travel in a straight line). And then some reach the eye/camera. #12;3 Reflectance Model how objects reflect light. Model light sources Algorithms for computing Shading: computing intensities within polygons Determine what light strikes what

  11. VIRTUAL LIGHT: DIGITALLY-GENERATED LIGHTING FOR VIDEO CONFERENCING APPLICATIONS

    E-Print Network [OSTI]

    Fisher, Kathleen

    VIRTUAL LIGHT: DIGITALLY-GENERATED LIGHTING FOR VIDEO CONFERENCING APPLICATIONS Andrea Basso method to improve the lighting conditions of a real scene or video sequence. In particular we concentrate on modifying real light sources intensities and inserting virtual lights into a real scene viewed from a fixed

  12. DOE Awards Small Business Task Order for Technical Support to...

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

    nuclear energy research. Addthis Related Articles DOE Awards Support Service Contract DOE Awards Small Business Task Order for Technical Support to the Office of...

  13. DOE Awards Small Business Task Order for Technical Support to...

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

    Contract Awarded to Small Business for Support Services DOE Awards Support Service Contract DOE Awards Small Business Task Order for Technical Support to the Office of...

  14. Design issues in the semantics and scheduling of asynchronous tasks.

    SciTech Connect (OSTI)

    Olivier, Stephen L.

    2013-07-01T23:59:59.000Z

    The asynchronous task model serves as a useful vehicle for shared memory parallel programming, particularly on multicore and manycore processors. As adoption of model among programmers has increased, support has emerged for the integration of task parallel language constructs into mainstream programming languages, e.g., C and C++. This paper examines some of the design decisions in Cilk and OpenMP concerning semantics and scheduling of asynchronous tasks with the aim of informing the efforts of committees considering language integration, as well as developers of new task parallel languages and libraries.

  15. Task Order Price Evaluation Worksheet for SUPER ESPC | Department...

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

    Document provides a worksheet for evaluating price for a task order as part of a Super Energy Savings Performance Contract (ESPC). priceevalworksheet.doc More Documents &...

  16. ESPC Task Order Schedules and Placement of Pricing Information...

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

    provides task order (TO) schedule descriptions and information on the placement of pricing for energy savings performance contracts (ESPCs). 54descriptionoftoschedulesj5....

  17. agency iea task: Topics by E-print Network

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

    be needed Dispatchable power plants Oak Ridge National Laboratory 24 IEA HPP Annex 41 Cold Climate Heat Energy Storage, Conversion and Utilization Websites Summary: .) - Task...

  18. Impedance Control of a Pneumatic Actuator for Contact Tasks

    E-Print Network [OSTI]

    Barth, Eric J.

    , pressure tracking, proportional spool valve. I. INTRODUCTION Industrial robots are good at tasks like force than motion. Typical industrial robot actuators (hydraulic and motor/gearhead systems

  19. On synchronous robotic networks - Part I: Models, tasks, and complexity

    E-Print Network [OSTI]

    Frazzoli, Emilio; Bullo, Francesco; Cortes, Jorge; Martinez, Sonia

    2007-01-01T23:59:59.000Z

    E. Frazzoli, “On synchronous robotic networks Part II: Timeto control design for mobile robotic networks. Application2007 On Synchronous Robotic Networks—Part I: Models, Tasks,

  20. association task force: Topics by E-print Network

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

    Directions for Information Technology at Binghamton for Research Bahgat Sammakia to lead the Task Force on Information Technology (IT). The president's original Suzuki,...

  1. aespoe task force: Topics by E-print Network

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

    Directions for Information Technology at Binghamton for Research Bahgat Sammakia to lead the Task Force on Information Technology (IT). The president's original Suzuki,...

  2. assessment task force: Topics by E-print Network

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

    Directions for Information Technology at Binghamton for Research Bahgat Sammakia to lead the Task Force on Information Technology (IT). The president's original Suzuki,...

  3. ESPC Sample Deliverables for Task Orders (IDIQ Attachment. J-4)

    Broader source: Energy.gov [DOE]

    Document features a sample of part 1 of pre-award task order deliverables for an energy savings performance contract (ESPC).

  4. FAQS Job Task Analyses - Safeguards and Security General Technical...

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

    Base More Documents & Publications FAQS Qualification Card - Safeguards and Security General Technical Base FAQS Job Task Analyses - General Technical Base FAQS Qualification Card...

  5. Task Order Awarded for Environmental Technical Services | Department...

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

    Project Office Audit Task Order Awarded for Technical and Safety Support Services DOE Issues Request for Quotations for Depleted Uranium Hexafluoride Conversion Technical Services...

  6. Scheduling of Two Agents Task Chains with a Central Selection ...

    E-Print Network [OSTI]

    2014-06-13T23:59:59.000Z

    each task belongs to one agent, and each agent is only interested in optimizing his/her own performance index. Although these problems can be viewed as a ...

  7. Lakeview Light and Power- Commercial Lighting Rebate Program

    Broader source: Energy.gov [DOE]

    Lakeview Light and Power offers a commercial lighting rebate program. Rebates apply to the installation of energy efficient lighting retrofits in non-residential buildings. The rebate program is...

  8. Green Light Pulse Oximeter

    DOE Patents [OSTI]

    Scharf, John Edward (Oldsmar, FL)

    1998-11-03T23:59:59.000Z

    A reflectance pulse oximeter that determines oxygen saturation of hemoglobin using two sources of electromagnetic radiation in the green optical region, which provides the maximum reflectance pulsation spectrum. The use of green light allows placement of an oximetry probe at central body sites (e.g., wrist, thigh, abdomen, forehead, scalp, and back). Preferably, the two green light sources alternately emit light at 560 nm and 577 nm, respectively, which gives the biggest difference in hemoglobin extinction coefficients between deoxyhemoglobin, RHb, and oxyhemoglobin, HbO.sub.2.

  9. White light velocity interferometer

    DOE Patents [OSTI]

    Erskine, D.J.

    1999-06-08T23:59:59.000Z

    The invention is a technique that allows the use of broadband and incoherent illumination. Although denoted white light velocimetry, this principle can be applied to any wave phenomenon. For the first time, powerful, compact or inexpensive sources can be used for remote target velocimetry. These include flash and arc lamps, light from detonations, pulsed lasers, chirped frequency lasers, and lasers operating simultaneously in several wavelengths. The technique is demonstrated with white light from an incandescent source to measure a target moving at 16 m/s. 41 figs.

  10. Parabolic Signorini Problem

    E-Print Network [OSTI]

    Arshak Petrosyan

    2011-11-16T23:59:59.000Z

    Page 41 ..... N(r,u) = iu(?r ) hu(?r ). For our generalization, however, iu and hu are too irregular and we have to average them to regain missing regularity: Hu(r) =.

  11. Optical Design of a Broadband Infrared Spectrometer for Bunch Length Measurement at the Linac Coherent Light Source

    SciTech Connect (OSTI)

    Williams, Kiel; /SLAC

    2012-09-07T23:59:59.000Z

    The electron pulses generated by the Linac Coherent Light Source at the SLAC National Accelerator Laboratory occur on the order of tens of femtoseconds and cannot be directly measured by conventional means. The length of the pulses can instead be reconstructed by measuring the spectrum of optical transition radiation emitted by the electrons as they move toward a conducting foil. Because the emitted radiation occurs in the mid-infrared from 0.6 to 30 microns a novel optical layout is required. Using a helium-neon laser with wavelength 633 nm, a series of gold-coated off-axis parabolic mirrors were positioned to direct a beam through a zinc selenide prism and to a focus at a CCD camera for imaging. Constructing this layout revealed a number of novel techniques for reducing the aberrations introduced into the system by the off-axis parabolic mirrors. The beam had a recorded radius of less than a millimeter at its final focus on the CCD imager. This preliminary setup serves as a model for the spectrometer that will ultimately measure the LCLS electron pulse duration.

  12. Sandia Energy - (Lighting and) Solid-State Lighting: Science...

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

    on the third and upcoming revolution (illumination). Topics cover the basics of light-emitting diode (LED) operation; a 200-year history of lighting technology; the importance of...

  13. Sandia National Laboratories: (Lighting and) Solid-State Lighting...

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

    on the third and upcoming revolution (illumination). Topics cover the basics of light-emitting diode (LED) operation; a 200-year history of lighting technology; the importance of...

  14. Columbia Water and Light- HVAC and Lighting Efficiency Rebates

    Broader source: Energy.gov [DOE]

    Columbia Water and Light (CWL) offers rebates to its commercial and industrial customers for the purchase of high efficiency HVAC installations and efficient lighting. Incentives for certain...

  15. Reading Municipal Light Department- Business Lighting Rebate Program

    Broader source: Energy.gov [DOE]

    Reading Municipal Light Department (RMLD) offers incentives for non-residential customers to install energy efficient lights and sensors in existing facilities. In addition to rebates for the...

  16. Peninsula Light Company- Commercial Efficient Lighting Rebate Program

    Broader source: Energy.gov [DOE]

    Peninsula Light Company (PLC) offers a rebate program for commercial customers who wish to upgrade to energy efficient lighting. Participating customers must be served by PLC commercial service....

  17. Light Duty Combustion Research: Advanced Light-Duty Combustion...

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

    duty Diesel Combustion Research Advanced Light-Duty Combustion Experiments Paul Miles Sandia National Laboratories Light-Duty Combustion Modeling Rolf Reitz University of Wisconsin...

  18. Efficient Light Sources Today

    E-Print Network [OSTI]

    Hart, A. L.

    1982-01-01T23:59:59.000Z

    This paper reviews new lamp and lighting technology in terms of application and economic impact. Included are the latest advances in High Intensity Discharge systems, energy saving fluorescent lamps and ballasts, and the new state of the art high...

  19. Natural lighting and skylights

    E-Print Network [OSTI]

    Evans, Benjamin Hampton

    1961-01-01T23:59:59.000Z

    outlined herein, the feasibility of using scale models for studying skylights is also an established fact. The method of analysis by models can be a valuable tool to any designer who is concerned about day-lighting....

  20. National Synchrotron Light Source

    ScienceCinema (OSTI)

    None

    2010-01-08T23:59:59.000Z

    A tour of Brookhaven's National Synchrotron Light Source (NSLS). The NSLS is one of the world's most widely used scientific research facilities, hosting more than 2,500 guest researchers each year. The NSLS provides intense beams of infrared, ultraviole

  1. Light Vector Mesons

    E-Print Network [OSTI]

    Alexander Milov

    2008-12-21T23:59:59.000Z

    This article reviews the current status of experimental results obtained in the measurement of light vector mesons produced in proton-proton and heavy ion collisions at different energies. The review is focused on two phenomena related to the light vector mesons; the modification of the spectral shape in search of Chiral symmetry restoration and suppression of the meson production in heavy ion collisions. The experimental results show that the spectral shape of light vector mesons are modified compared to the parameters measured in vacuum. The nature and the magnitude of the modification depends on the energy density of the media in which they are produced. The suppression patterns of light vector mesons are different from the measurements of other mesons and baryons. The mechanisms responsible for the suppression of the mesons are not yet understood. Systematic comparison of existing experimental results points to the missing data which may help to resolve the problem.

  2. Light and Plants Plants use light to photosynthesize. Name two places that light can come from

    E-Print Network [OSTI]

    Koptur, Suzanne

    Light and Plants Plants use light to photosynthesize. Name two places that light can come from: 1 (CO2, a gas) from the air and turn it into SUGARS (food). This process is powered by energy from light plants) for energy. Photosynthetically Active Radiation (PAR) is a combination of red light and blue

  3. Light and Energy -Daylight measurements

    E-Print Network [OSTI]

    Light and Energy - Daylight measurements #12;Light and Energy - Daylight measurements Authors: Jens;3 Title Light and Energy Subtitle Daylight measurements Authors Jens Christoffersen, Ásta Logadóttir ........................................................................................................ 5 Daylight quantity

  4. Light as a Healing Mechanism

    E-Print Network [OSTI]

    Lingampalli, Nithya

    2013-01-01T23:59:59.000Z

    S. (1991). Meridians conduct light. Moskow: Raum and Zeit.the bod’ys absorption of light. Explore, 9(2), doi: https://01). The healing use of light and color. Health Care Design

  5. Solid state lighting component

    DOE Patents [OSTI]

    Yuan, Thomas; Keller, Bernd; Ibbetson, James; Tarsa, Eric; Negley, Gerald

    2010-10-26T23:59:59.000Z

    An LED component comprising an array of LED chips mounted on a planar surface of a submount with the LED chips capable of emitting light in response to an electrical signal. The LED chips comprise respective groups emitting at different colors of light, with each of the groups interconnected in a series circuit. A lens is included over the LED chips. Other embodiments can comprise thermal spreading structures included integral to the submount and arranged to dissipate heat from the LED chips.

  6. Solid state lighting component

    DOE Patents [OSTI]

    Keller, Bernd; Ibbetson, James; Tarsa, Eric; Negley, Gerald; Yuan, Thomas

    2012-07-10T23:59:59.000Z

    An LED component comprising an array of LED chips mounted on a planar surface of a submount with the LED chips capable of emitting light in response to an electrical signal. The LED chips comprise respective groups emitting at different colors of light, with each of the groups interconnected in a series circuit. A lens is included over the LED chips. Other embodiments can comprise thermal spreading structures included integral to the submount and arranged to dissipate heat from the LED chips.

  7. July 18, 2012 Using QECBs for Street Lighting Upgrades

    E-Print Network [OSTI]

    lighting technologies (e.g. light-emitting diodes, induction lighting) can reduce street light energy

  8. COST FUNCTIONS FOR SCHEDULING TASKS IN CYBER-PHYSICAL SYSTEMS

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    COST FUNCTIONS FOR SCHEDULING TASKS IN CYBER-PHYSICAL SYSTEMS Abhinna Jain, C.M. Krishna, Israel, cost functions, controlled plant dynamics Abstract: In Cyber Physical Systems (CPS), computational response times are different. In this paper, we consider using cost functions of task response time

  9. Task analysis: a detailed example of stepping up from JSA

    SciTech Connect (OSTI)

    Banks, W.W.; Paramore, B.A.; Buys, J.R.

    1984-10-01T23:59:59.000Z

    This paper discusses a pilot task analysis of operations in a proposed facility for the cutting and packaging of radioactively contaminated gloveboxes, for long-term storage or burial. The objective was to demonstrate how task analysis may be used as a tool for planning and risk management. Two specific products were generated - preliminary operating procedures and training requirements. The task data base, procedures list and training requirements developed were intended as first order categorizations. The analysis was limited to tasks that will be performed within the boundaries of the operational facility and the associated load-out area. The analysis documents tasks to be performed by D and D (Decontamination and Decommissioning) Workers. However, the analysis included all tasks identified as an integral part of glovebox processing within the facility. Thus tasks involving Radiation Protection Technicians (RPTs) are included. Based on hazard assessments, it is planned that at least two RPTs will be assigned full-time to the facility, so they may be considered part of its crew. Similarly, supervisory/administrative tasks are included where they were determined to be directly part of process sequences, such as obtaining appropriate certification. 11 tables.

  10. OOC Web Conferencing Team Report Web Conferencing Task Team

    E-Print Network [OSTI]

    OOC Web Conferencing Team Report Web Conferencing Task Team Final Report ­ 1/24/2014 #12;OOC Web Conferencing Team Report 2 | P a g e Web Conferencing Task Team Final Report ­ 1/24/2014 Contents Executive.........................................................................................................................................................3 Team Charge

  11. MODELING AND CONTROLLING PARALLEL TASKS IN DROPLET-BASED MICROFLUIDIC

    E-Print Network [OSTI]

    Chapter 12 MODELING AND CONTROLLING PARALLEL TASKS IN DROPLET-BASED MICROFLUIDIC SYSTEMS Karl F-independent models and algorithms to automate the operation of droplet-based microfluidic systems. In these systems mapping of a biochemical analysis task onto a droplet-based microfluidic system is investigated. Achieving

  12. UW SCHOOL OF PHARMACY EDUCATIONAL INNOVATION TASK FORCE

    E-Print Network [OSTI]

    Sheridan, Jennifer

    UW SCHOOL OF PHARMACY EDUCATIONAL INNOVATION TASK FORCE 2012-2013 Barry Gidal (chair) Ron Burnette of the Task Force and how those activities fulfilled the charges and support the School's mission and strategic priorities. These documents will be posted, as appropriate, on the SOP Committee webpage (http://pharmacy.wisc.edu/about-school

  13. Task Assignment in a Server Farm with Switching Delays and

    E-Print Network [OSTI]

    Hyytiä, Esa

    Task Assignment in a Server Farm with Switching Delays and General Energy-Aware Cost Structure Esa Servers Customers Basic problem E[T] k parallel queues Tasks arrive at rate (Poisson process) Objective;Switching Delays and Energy Model for Server Farm k parallel servers Size-aware setting Dispatcher Servers

  14. Age-Related Changes in Task Related Functional Network Connectivity

    E-Print Network [OSTI]

    the information load [2,3,4], retention interval [5,6] and response time duration [7,8]. Results from fMRI studies-serving these processes have been elucidated with experimental manipulations that vary task demands by altering with these alterations in task demands [9]. Advancing age is associated with decreased performance on verbal working

  15. Task 8 -- Design and test of critical components

    SciTech Connect (OSTI)

    Chance, T.F.

    1996-11-01T23:59:59.000Z

    This report covers tasks 8.1, 8.1.1, and 8.2. The primary objective of Task 8.1, Particulates Flow Deposition, is to characterize the particulate generated in an operating gas turbine combined cycle (GTCC) power plant whose configuration approximates that proposed for an ATS power plant. In addition, the task is to evaluate the use of full-flow filtering to reduce the steam particulate loads. Before the start of this task, GE had already negotiated an agreement with the candidate power plant, piping and a filter unit had already been installed at the power plant site, and major elements of the data acquisition system had been purchased. The objective of Task 8.1.1, Coolant Purity, is to expose typical ATS gas turbine airfoil cooling channel geometries to real steam flow to determine whether there are any unexpected deposit formations. The task is a static analog of the centrifugal deposition rig trials of Task 8.2, in which a bucket channel return bend is exposed to steam flow. Two cooling channel geometries are of primary interest in this static exposure. The primary objective of Task 8.2, Particle Centrifugal Sedimentation, is to determine the settling characteristics of particles in a cooling stream from an operating gas turbine combined cycle (GTCC) power plant when that stream is ducted through a passage experiencing the G-loads expected in a simulated bucket channel specimen representative of designs proposed for an ATS gas turbine.

  16. Academic Science Program Task Force Tuesday, September 13, 2011

    E-Print Network [OSTI]

    Academic Science Program Task Force Tuesday, September 13, 2011 3:00 p.m. Nelson Hall, Room 3220 on the Academic Science Program Task Force to Council of Deans on Thursday, September 22, 2011 · Margery has been, September 28, 2011 in Witherspoon Cinema from 3-4 p.m. and topics will include budget, strategic plan

  17. h"p://pegasus.isi.edu Balanced Task Clustering in

    E-Print Network [OSTI]

    Deelman, Ewa

    h"p://pegasus.isi.edu Balanced Task Clustering in Scientific Workflows Weiwei Chen*, Rafael of Manchester, School of Computer Science, Manchester, U.K. Oct 24, 2013, CNCC, Beijing 1 h"p://pegasus.isi.edu #12;h"p://pegasus.isi.edu Outline · Introduction ­ Workflow Model ­ Execution Environment · Task

  18. Gasification Studies Task 4 Topical Report

    SciTech Connect (OSTI)

    Whitty, Kevin; Fletcher, Thomas; Pugmire, Ronald; Smith, Philip; Sutherland, James; Thornock, Jeremy; Boshayeshi, Babak; Hunsacker, Isaac; Lewis, Aaron; Waind, Travis; Kelly, Kerry

    2014-02-01T23:59:59.000Z

    A key objective of the Task 4 activities has been to develop simulation tools to support development, troubleshooting and optimization of pressurized entrained-flow coal gasifiers. The overall gasifier models (Subtask 4.1) combine submodels for fluid flow (Subtask 4.2) and heat transfer (Subtask 4.3) with fundamental understanding of the chemical processes (Subtask 4.4) processes that take place as coal particles are converted to synthesis gas and slag. However, it is important to be able to compare predictions from the models against data obtained from actual operating coal gasifiers, and Subtask 4.6 aims to provide an accessible, non-proprietary system, which can be operated over a wide range of conditions to provide well-characterized data for model validation. Highlights of this work include: • Verification and validation activities performed with the Arches coal gasification simulation tool on experimental data from the CANMET gasifier (Subtask 4.1). • The simulation of multiphase reacting flows with coal particles including detailed gas-phase chemistry calculations using an extension of the one-dimensional turbulence model’s capability (Subtask 4.2). • The demonstration and implementation of the Reverse Monte Carlo ray tracing (RMCRT) radiation algorithm in the ARCHES code (Subtask 4.3). • Determination of steam and CO{sub 2} gasification kinetics of bituminous coal chars at high temperature and elevated pressure under entrained-flow conditions (Subtask 4.4). In addition, attempts were made to gain insight into the chemical structure differences between young and mature coal soot, but both NMR and TEM characterization efforts were hampered by the highly reacted nature of the soot. • The development, operation, and demonstration of in-situ gas phase measurements from the University of Utah’s pilot-scale entrained-flow coal gasifier (EFG) (Subtask 4.6). This subtask aimed at acquiring predictable, consistent performance and characterizing the environment within the gasifier.

  19. Sandia National Laboratories: White Light Creation Architectures

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

    Light Creation Architectures White Light Creation Architectures Overview of SSL White Light Creation Architectures The entire spectral range of visible light can be...

  20. Sandia National Laboratories: Lighting Developments to 2030

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

    ClimateLighting Developments to 2030 Lighting Developments to 2030 videobanner Lighting Technologies, Costs, and Energy Demand: Global Developments to 2030 V iew Slides: Lighting...

  1. Interior Light Level Measurements Appendix F -Interior Light Level Measurements

    E-Print Network [OSTI]

    Appendix F ­ Interior Light Level Measurements #12;F.1 Appendix F - Interior Light Level. A potential concern is that a lower VT glazing may increase electric lighting use to compensate for lost qualify and quantify a representative loss of daylighting, and therefore electric lighting use

  2. Quasi light fields: extending the light field to coherent radiation

    E-Print Network [OSTI]

    Wornell, Gregory W.

    Quasi light fields: extending the light field to coherent radiation Anthony Accardi1,2 and Gregory light field, and for coherent radiation using electromagnetic field theory. We present a model of coherent image formation that strikes a balance between the utility of the light field

  3. Lighting affects appearance LightSource emits photons

    E-Print Network [OSTI]

    Jacobs, David

    1 Lighting affects appearance #12;2 LightSource emits photons Photons travel in a straight line). And then some reach the eye/camera. #12;3 Basic fact: Light is linear Double intensity of sources, double photons reaching eye. Turn on two lights, and photons reaching eye are same as sum of number when each

  4. Smart Lighting: A Second Wave in Solid State Lighting?

    E-Print Network [OSTI]

    Salama, Khaled

    Smart Lighting: A Second Wave in Solid State Lighting? OIDA Conference on Green Photonics Bob Karlicek Director, Smart Lighting Engineering Research Center Rensselaer Polytechnic Institute June 2010 #12;2 Outline · The First Wave of Solid State Lighting · Complex Dynamics in the Supply Chain · What

  5. The coupling between eye movements and cognition varies with the task at hand. In tasks like reading, the eyes

    E-Print Network [OSTI]

    Logan, Gordon D.

    The coupling between eye movements and cognition varies with the task at hand. In tasks like reading, the eyes are "the window to the soul," moving with each step of the underlying process, the coupling is looser. People tend to look at certain locations, but the sequence of eye movements

  6. Thermoacoustic engine simulations with lattice Boltzmann CFD. Tasks 3, 4 and 5 progress report

    SciTech Connect (OSTI)

    NONE

    1995-02-06T23:59:59.000Z

    Advanced Projects Research Incorporated has completed tasks number 3, 4 and 5 of the specified tasks in the LANL subcontract. Task 3 required measurement of the acoustic attenuation for various thermoacoustic conditions and Task 4 involved the analysis of the energy transfer mechanisms for the geometries of Task 3. Finally, Task 5 specified that simulations of thermoacoustic engine configurations used at LANL were to be performed. Discussion of all 3 task results is presented.

  7. Sneaky light stop

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

    Eifert, Till; Nachman, Benjamin

    2015-04-01T23:59:59.000Z

    A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the standard model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this ‘stealth stop’ scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. Duemore »to the different initial states, the size of the bias is slightly different between the LHC and the Tevatron. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.« less

  8. Pupillary efficient lighting system

    DOE Patents [OSTI]

    Berman, Samuel M. (San Francisco, CA); Jewett, Don L. (Mill Valley, CA)

    1991-01-01T23:59:59.000Z

    A lighting system having at least two independent lighting subsystems each with a different ratio of scotopic illumination to photopic illumination. The radiant energy in the visible region of the spectrum of the lighting subsystems can be adjusted relative to each other so that the total scotopic illumination of the combined system and the total photopic illumination of the combined system can be varied independently. The dilation or contraction of the pupil of an eye is controlled by the level of scotopic illumination and because the scotopic and photopic illumination can be separately controlled, the system allows the pupil size to be varied independently of the level of photopic illumination. Hence, the vision process can be improved for a given level of photopic illumination.

  9. Light emitting ceramic device

    DOE Patents [OSTI]

    Valentine, Paul; Edwards, Doreen D.; Walker, Jr., William John; Slack, Lyle H.; Brown, Wayne Douglas; Osborne, Cathy; Norton, Michael; Begley, Richard

    2010-05-18T23:59:59.000Z

    A light-emitting ceramic based panel, hereafter termed "electroceramescent" panel, is herein claimed. The electroceramescent panel is formed on a substrate providing mechanical support as well as serving as the base electrode for the device. One or more semiconductive ceramic layers directly overlay the substrate, and electrical conductivity and ionic diffusion are controlled. Light emitting regions overlay the semiconductive ceramic layers, and said regions consist sequentially of a layer of a ceramic insulation layer and an electroluminescent layer, comprised of doped phosphors or the equivalent. One or more conductive top electrode layers having optically transmissive areas overlay the light emitting regions, and a multi-layered top barrier cover comprising one or more optically transmissive non-combustible insulation layers overlay said top electrode regions.

  10. Light harvesting arrays

    DOE Patents [OSTI]

    Lindsey, Jonathan S. (Raleigh, NC)

    2002-01-01T23:59:59.000Z

    A light harvesting array useful for the manufacture of devices such as solar cells comprises: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to the first electrode, each of the light harvesting rods comprising a polymer of Formula I: X.sup.1.paren open-st.X.sup.m+1).sub.m (I) wherein m is at least 1, and may be from two, three or four to 20 or more; X.sup.1 is a charge separation group (and preferably a porphyrinic macrocycle, which may be one ligand of a double-decker sandwich compound) having an excited-state of energy equal to or lower than that of X.sup.2, and X.sup.2 through X.sup.m+1 are chromophores (and again are preferably porphyrinic macrocycles).

  11. Stability of critical bubble in stretched fluid of square-gradient density-functional model with triple-parabolic free energy

    E-Print Network [OSTI]

    Masao Iwamatsu; Yutaka Okabe

    2010-06-11T23:59:59.000Z

    The square-gradient density-functional model with triple-parabolic free energy, that was used previously to study the homogeneous bubble nucleation [J. Chem. Phys. 129, 104508 (2008)], is used to study the stability of the critical bubble nucleated within the bulk under-saturated stretched fluid. The stability of the bubble is studied by solving the Schr\\"odinger equation for the fluctuation. The negative eigenvalue corresponds to the unstable growing mode of the fluctuation. Our results show that there is only one negative eigenvalue whose eigenfunction represents the fluctuation that corresponds to the isotropically growing or shrinking nucleus. In particular, this negative eigenvalue survives up to the spinodal point. Therefore the critical bubble is not fractal or ramified near the spinodal.

  12. The CAESAR project: Experimental and modeling investigations of methane reforming in a CAtalytically Enhanced Solar Absorption Receiver on a parabolic dish

    SciTech Connect (OSTI)

    Muir, J.F.; Hogan, R.E. Jr.; Skocypec, R.D. [Sandia National Labs., Albuquerque, NM (US); Buck, R. [Deutsche Forschungsanstalt fuer Luft- und Raumfahrt, Stuttgart (DE). Inst. of Technical Thermodynamics

    1993-07-01T23:59:59.000Z

    A joint US/Federal Republic of Germany (FRG) project has successfully tested a unique solar-driven chemical reactor in the CAtalytically Enhanced Solar Absorption Receiver (CAESAR) experiment. The CAESAR test was a {open_quotes}proof-of-concept{close_quotes} demonstration of carbon-dioxide reforming of methane in a commercial-scale, solar, volumetric receiver/reactor on a parabolic dish concentrator. The CAESAR design; test facility and instrumentation; thermal and chemical tests; and analysis of test results are presented in detail. Numerical models for the absorber and the receiver are developed and predicted performance is compared with test data. Post test analyses to assess the structural condition of the absorber and the effectiveness of the rhodium catalyst are presented. Unresolved technical issues are identified and future development efforts are recommended.

  13. Research Note on a Parabolic Heat-Balance Integral Method with Unspecified Exponent: An Entropy Generation Approach in Optimal Profile Determination

    E-Print Network [OSTI]

    Jordan Hristov

    2010-12-12T23:59:59.000Z

    The heat-balance integral method of Goodman is studied with two simple 1-D heat conduction problems with prescribed temperature and flux boundary conditions. These classical problems with well known exact solutions enable to demonstrate the heat-balance integral method performance by a parabolic profile and the entropy generation minimization concept in definition of the appropriate profile exponent. The basic assumption generating the additional constraints needed to perform the solution is based on the requirement to minimize the difference in the local thermal entropy generation rates calculated by the approximate and the exact profile, respectively. This concept is easily applicable since the general concept has simple implementation of the condition requiring the thermal entropy generations calculated through both profiles to be the same at the boundary. The entropy minimization generation approach automatically generates the additional requirement which is deficient in the set of conditions defined by the heat-balance integral method concept.

  14. MANDATORY MEASURES INDOOR LIGHTING CONTROLS

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES INDOOR LIGHTING CONTROLS (Reference: Sub-Chapter 4, Section 130.1) #12;SECTION 4 MANDATORY LIGHTING CONTROLS 1. 130.1 (a) Area Controls: Manual controls that control lighting in each area separately 2. 130.1 (b) Multi-level Controls: Allow occupants to choose the appropriate light level for each

  15. MANDATORY MEASURES INDOOR LIGHTING CONTROLS

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES INDOOR LIGHTING CONTROLS (Reference: Sub-Chapter 4, Section 130.1) #12;SECTION 3 MANDATORY LIGHTING CONTROLS 1. 130.1 (a) Area Controls: Manual controls that control lighting in each area separately 2. 130.1 (b) Multi-level Controls: "Dimmability." Allow occupants to choose the appropriate light

  16. MANDATORY MEASURES INDOOR LIGHTING CONTROLS

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES INDOOR LIGHTING CONTROLS (Reference: Sub-Chapter 4, Section 130.1) #12;SECTION 5 MANDATORY LIGHTING CONTROLS 1. Area Controls: Manual controls that control lighting in each area separately 2. Multi-level Controls: Allow occupants to choose the appropriate light level for each area 3. Shut

  17. LIGHTING 101 1. Common terminology

    E-Print Network [OSTI]

    California at Davis, University of

    SECTION 3 LIGHTING 101 1. Common terminology 2. Sources & luminaires 3. Controls #12;SECTION 3SECTION 3 DISCUSSION: COMMON LIGHTING TERMINOLOGY 1. What are the definitions of the following lighting terms? 2. Do you use these terms in professional practice? 3. What other lighting terminology do you use

  18. LIGHTING 101 1. Common terminology

    E-Print Network [OSTI]

    California at Davis, University of

    LIGHTING 101 1. Common terminology 2. Sources and luminaires 3. Controls #12;SECTION 2 DISCUSSION: COMMON LIGHTING TERMINOLOGY 1. What are the definitions of the following lighting terms? 2. Do you use these terms in professional practice? 3. What other lighting terminology do you use on the job? SLIDE 14

  19. Radioluminescent lighting technology

    SciTech Connect (OSTI)

    Not Available

    1990-01-01T23:59:59.000Z

    The glow-in-the-dark stereotype that characterizes the popular image of nuclear materials is not accidental. When the French scientist, Henri Becquerel, first discovered radioactivity in 1896, he was interested in luminescence. Radioluminescence, the production of light from a mixture of energetic and passive materials, is probably the oldest practical application of the unstable nucleus. Tritium-based radioluminescent lighting, in spite of the biologically favorable character of the gaseous tritium isotope, was included in the general tightening of environmental and safety regulations. Tritium light manufacturers would have to meet two fundamental conditions: (1) The benefit clearly outweighed the risk, to the extent that even the perceived risk of a skeptical public would be overcome. (2) The need was significant enough that the customer/user would be willing and able to afford the cost of regulation that was imposed both in the manufacture, use and eventual disposal of nuclear materials. In 1981, researchers at Oak Ridge National Laboratory were investigating larger radioluminescent applications using byproduct nuclear material such as krypton-85, as well as tritium. By 1982, it appeared that large source, (100 Curies or more) tritium gas tube, lights might be useful for marking runways and drop zones for military operations and perhaps even special civilian aviation applications. The successful development of this idea depended on making the light bright enough and demonstrating that large gas tube sources could be used and maintained safely in the environment. This successful DOE program is now in the process of being completed and closed-out. Working closely with the tritium light industry, State governments and other Federal agencies, the basic program goals have been achieved. This is a detailed report of what they have learned, proven, and discovered. 91 refs., 29 figs., 5 tabs. (JF)

  20. Sequential tasks performed by catalytic pumps for colloidal crystallization

    E-Print Network [OSTI]

    Ali Afshar Farniya; Maria J. Esplandiu; Adrian Bachtold

    2014-10-20T23:59:59.000Z

    Gold-platinum catalytic pumps immersed in a chemical fuel are used to manipulate silica colloids. The manipulation relies on the electric field and the fluid flow generated by the pump. Catalytic pumps perform various tasks, such as the repulsion of colloids, the attraction of colloids, and the guided crystallization of colloids. We demonstrate that catalytic pumps can execute these tasks sequentially over time. Switching from one task to the next is related to the local change of the proton concentration, which modifies the colloid zeta potential and consequently the electric force acting on the colloids.

  1. AIRPORT LIGHTING Session Highlights

    E-Print Network [OSTI]

    Minnesota, University of

    Administration advisory circulars, available online at www.faa.gov or by mail at the following address: Federal Aviation Administration, Airports 800 Independence Ave. S.W. Washington, D.C. 20591 To qualify for federal AND NAVIGATIONAL AIDS A complete list of federal regulations for airfield lighting is located in Federal Aviation

  2. Tokyo Street Lights

    E-Print Network [OSTI]

    Hacker, Randi; Tsutsui, William

    2008-03-12T23:59:59.000Z

    that you have only 17, no 16, no 15 seconds left to get to the other side before the light changes and the impatient American drivers put the pedal to the metal and it's road kill time. Talk about stress! In Tokyo, crossing the street is a leisurely...

  3. Sweetness and light 

    E-Print Network [OSTI]

    Craig, Katie

    2014-07-03T23:59:59.000Z

    1. Sweetness and Light. A novel. Judi lives in a nice, clean house with her seventeen year old stepson, who won’t talk to her in anything but monosyllables. His father, Nelson, and she are struggling to relate to each ...

  4. Running head: IDENTIFYINFG SOCIAL TMX AND TASK TMX PROCESSES 1 An Identification and Illustration of the Social TMX and Task TMX Processes

    E-Print Network [OSTI]

    Vellekoop, Michel

    of the Social TMX and Task TMX Processes Samantha Esmeralda Korenhof University of Twente #12;IDENTIFYINFG

  5. On Task Assignment in Data Intensive Scalable Computing

    E-Print Network [OSTI]

    Feitelson, Dror

    , a crucial task in surviving the "Data Deluge". Recent works have shown that maintaining data locality- crease of data available for analytical processing­the so-called "Data Deluge" [7]. The cloud computing

  6. Energy Department Awards First Major Task Order Under Streamlined...

    Office of Environmental Management (EM)

    Task Order Under Streamlined Contracting System October 17, 2005 - 11:59am Addthis New Mexico Firm Contracted for Ashtabula Clean-up WASHINGTON, DC - The Department of Energy...

  7. The Task of the Referee Alan Jay Smith

    E-Print Network [OSTI]

    Torr, Philip H. S.

    The Task of the Referee * Alan Jay Smith Computer Science Division EECS Department University professional. Typically, referees learn to ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ * Prof. Smith's research

  8. Task Order Awarded for Audit and Review Services | Department...

    Office of Environmental Management (EM)

    Media Contact Bill Taylor bill.taylor@srs.gov 803-952-8564 Cincinnati - The Department of Energy today awarded a Task Order to KPMG, LLP of McLean, VA for auditreview services...

  9. Hierarchical Task and Motion Planning in the Now

    E-Print Network [OSTI]

    Kaelbling, Leslie Pack

    2010-05-07T23:59:59.000Z

    In this paper we outline an approach to the integration of task planning and motion planning that has the following key properties: It is aggressively hierarchical. It makes choices and commits to them in a top-down fashion ...

  10. Robust execution of bipedal walking tasks from biomechanical principles

    E-Print Network [OSTI]

    Hofmann, Andreas G. (Andreas Gunther)

    2006-01-01T23:59:59.000Z

    Effective use of robots in unstructured environments requires that they have sufficient autonomy and agility to execute task-level commands successfully. A challenging example of such a robot is a bipedal walking machine. ...

  11. Robust Execution of Bipedal Walking Tasks From Biomechanical Principles

    E-Print Network [OSTI]

    Hofmann, Andreas

    2006-04-28T23:59:59.000Z

    Effective use of robots in unstructured environments requires that they have sufficient autonomy and agility to execute task-level commands successfully. A challenging example of such a robot is a bipedal walking machine. ...

  12. Vision-based handling tasks for an autonomous outdoor forklift

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    (HMCs) perform the task of transporting molten aluminium from the smelter (where the aluminium is made the smelter (where the aluminium is made) to the casting house where it is turned into block products

  13. ARI Task Force, ECA Work to Stimulate Regional Economies

    Broader source: Energy.gov [DOE]

    WASHINGTON, D.C. – DOE’s Asset Revitalization Initiative (ARI) Task Force met with the Energy Communities Alliance (ECA) this week to advance the Department’s processes for transferring excess land...

  14. Bacteria Total Maximum Daily Load Task Force Final Report 

    E-Print Network [OSTI]

    Jones, C. Allan; Wagner, Kevin; Di Giovanni, George; Hauck, Larry; Mott, Joanna; Rifai, Hanadi; Srinivasan, Raghavan; Ward, George; Wythe, Kathy

    2009-01-01T23:59:59.000Z

    In September 2006, the Texas Commission on Environmental Quality (TCEQ) and Texas State Soil and Water Conservation Board (TSSWCB) charged a seven-person Bacteria Total Maximum Daily Load (TMDL) Task Force with: * examining approaches...

  15. Autonomous Environment and Task Adaptation for Robotic Agents

    E-Print Network [OSTI]

    Cremers, Daniel

    Autonomous Environment and Task Adaptation for Robotic Agents Michael Beetz and Thorsten Belker of Bonn, Dept. of Computer Science III, Roemerstr. 164, D- 53117 Bonn, Germany, email: ¢ beetz,belker£ @cs

  16. Multi-Task Learning and Matrix Regularization Andreas Argyriou

    E-Print Network [OSTI]

    Stephens, Matthew

    (contd.) · Marketing databases, collaborative filtering, recommendation systems (e.g. Netflix); task functions ft(x) = wt, x t = 1, . . . , n (we ignore nonlinearities for the moment) · Want to impose common

  17. Differences in intergender communication within task-oriented dyads

    E-Print Network [OSTI]

    McAfee, Joanna Lynn

    1999-01-01T23:59:59.000Z

    and least when being interrupted within that topic. Simkins-Bullock and Wildman (1991) investigated how sex composition of dyads affected the kind of language used within the dyad. The researchers asked each dyad to discuss suggestions that might... participants arrived they found instruction packets on clipboards and laid one on each chair. This task was modeled after that used by Simkins-Bullock and Wildman (1991), although I designed the instructions. This is a gender-neutral task, one...

  18. Robot task planning in a non-ideal blocks world

    E-Print Network [OSTI]

    Rangadass, Vasudev

    1988-01-01T23:59:59.000Z

    ROBOT TASK PLANNING IN A NON-IDEAL BLOCKS WORLD A Thesis by VASUDEV RANGADASS Submitted to the Graduate College Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1988 Major Subject...: Computer Science ROBOT TASK PLANNING IN A NON-IDEAL BLOCKS WORLD A Thesis by VASUDEV RANGADASS Approved as to style and content by: Amitabha Mu ee (Chairman of Committee) Glen Williams (Member) Arun Sen (Member) Glen Williams (Head...

  19. Superposed Coherent and Squeezed Light

    E-Print Network [OSTI]

    Fesseha Kassahun

    2012-01-18T23:59:59.000Z

    We first calculate the mean photon number and quadrature variance of superposed coherent and squeezed light, following a procedure of analysis based on combining the Hamiltonians and using the usual definition for the quadrature variance of superposed light beams. This procedure of analysis leads to physically unjustifiable mean photon number of the coherent light and quadrature variance of the superposed light. We then determine both of these properties employing a procedure of analysis based on superposing the Q functions and applying a slightly modified definition for the quadrature variance of a pair of superposed light beams. We find the expected mean photon number of the coherent light and the quadrature variance of the superposed light. Moreover, the quadrature squeezing of the superposed output light turns out to be equal to that of the superposed cavity light.

  20. ASPEN PLUS modeling of the SRC-I Demonstration Plant. Task 2: SRC unit detailed model report

    SciTech Connect (OSTI)

    Kalb, C.E.; Guro, D.E.; Bixler, A.D.; Vakil, T.D.

    1984-09-28T23:59:59.000Z

    A detailed model of the SRC process areas of the SRC-I Demonstration Plant was developed using the ASPEN PLUS process simulator. The model permits, for the first time, steady-state flowsheet convergence for the entire SRC process area in a single computer run. Simulation results are presented based on new thermodynamic correlations derived from experimental data on coal liquids. The correlations predict separations in certain key vessels which are rather different from those in the current SRC-I Baseline Design, which was based on conventional petroleum thermophysical properties. The differences are discussed in-light of their effects on equipment configuration and size. Distillation column parameters were adjusted to maintain the purity specifications of the major product streams. Split fractions based on the coal-liquids results are presented which can be used in the Task 1 SRC area summary model. Notes: Task 2, Appendices 2 is DOE/OR/21486--T8. 5 references, 32 tables.

  1. Transformations in Lighting: The Ninth Annual Solid-State Lighting...

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

    in DOE's "Transformations in Lighting" Solid-State Lighting (SSL) R&D Workshop. DOE SSL Portfolio Manager James Brodrick kicked off Day 1 by observing that although LED...

  2. Lighting energy efficiency opportunities at Cheyenne Mountain Air Station

    SciTech Connect (OSTI)

    Molburg, J.C.; Rozo, A.J.; Sarles, J.K.; Haffenden, R.A.; Thimmapuram, P.R.; Cavallo, J.D.

    1996-06-01T23:59:59.000Z

    CMAS is an intensive user of electricity for lighting because of its size, lack of daylight, and 24-hour operating schedule. Argonne National Laboratory recently conducted a lighting energy conservation evaluation at CMAS. The evaluation included inspection and characterization of existing lighting systems, analysis of energy-efficient retrofit options, and investigation of the environmental effects that these lighting system retrofits could have when they are ready to be disposed of as waste. Argonne devised three retrofit options for the existing lighting systems at various buildings: (1) minimal retrofit--limited fixture replacement; (2) moderate retrofit--more extensive fixture replacement and limited application of motion detectors; and (3) advanced retrofit--fixture replacement, reduction in the number of lamps, expansion of task lighting, and more extensive application of motion detectors. Argonne used data on electricity consumption to analyze the economic and energy effects of these three retrofit options. It performed a cost analysis for each retrofit option in terms of payback. The analysis showed that lighting retrofits result in savings because they reduce electricity consumption, cooling load, and maintenance costs. The payback period for all retrofit options was found to be less than 2 years, with the payback period decreasing for more aggressive retrofits. These short payback periods derived largely from the intensive (24-hours-per-day) use of electric lighting at the facility. Maintenance savings accounted for more than half of the annual energy-related savings under the minimal and moderate retrofit options and slightly less than half of these savings under the advanced retrofit option. Even if maintenance savings were excluded, the payback periods would still be impressive: about 4.4 years for the minimal retrofit option and 2 years for the advanced option. The local and regional environmental impacts of the three retrofit options were minimal.

  3. Operator Performance in Long Duration Control Operations: Switching from Low to High Task Load

    E-Print Network [OSTI]

    Thornburg, K. M.

    Long duration, low task load environments are typical for nuclear power plant control rooms, where operators, after hours of operating under a low task load situation, may have to shift to a high task load situation. The ...

  4. Ventilation efficiencies and thermal comfort results of a desk-edge-mounted task ventilation system

    E-Print Network [OSTI]

    Faulkner, D.; Fisk, W.J.; Sullivan, D.P.; Lee, S.M.

    2003-01-01T23:59:59.000Z

    EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner, WJ Fisk, DPDESK-EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner * , WJcomfort of a task ventilation system with an air supply

  5. Does Age Effect Dual-tasking Ability? Data from Healthy Participants using a new Experimental Paradigm. 

    E-Print Network [OSTI]

    Ghazali, Zayba

    2011-06-29T23:59:59.000Z

    OBJECTIVES: This study aimed to explore age-related differences in dual-tasking. Previous studies report no age-effects in dual-tasking among healthy individuals in comparison to severe dual-tasking impairment in Alzheimer’s ...

  6. The effects of ego-involvement with the task upon the self-esteem/task performance relationship

    E-Print Network [OSTI]

    Nilles, Carol Anne

    1983-01-01T23:59:59.000Z

    study by Cottrell (1965). Not all of the research results involving task-speci- fic self-esteem have supported Korman's consistency theo- ry, however, As previously mentioned, several studies have yielded only partial support. Cohen and Lefkowitz... are motivated to maintain consistency between their self-esteem and their task performance (Korman, 1970). The research evidence re- garding this contention has generally been mixed. While numerous studies have provided support for Korman's con- sistency...

  7. Light cone matrix product

    SciTech Connect (OSTI)

    Hastings, Matthew B [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    We show how to combine the light-cone and matrix product algorithms to simulate quantum systems far from equilibrium for long times. For the case of the XXZ spin chain at {Delta} = 0.5, we simulate to a time of {approx} 22.5. While part of the long simulation time is due to the use of the light-cone method, we also describe a modification of the infinite time-evolving bond decimation algorithm with improved numerical stability, and we describe how to incorporate symmetry into this algorithm. While statistical sampling error means that we are not yet able to make a definite statement, the behavior of the simulation at long times indicates the appearance of either 'revivals' in the order parameter as predicted by Hastings and Levitov (e-print arXiv:0806.4283) or of a distinct shoulder in the decay of the order parameter.

  8. Nonequilibrium lighting plasmas

    SciTech Connect (OSTI)

    Dakin, J.T. (GE Lighting, Nela Park, Cleveland, OH (US))

    1991-12-01T23:59:59.000Z

    In this paper the science of a variety of devices employing nonequilibrium lighting plasmas is reviewed. The devices include the fluorescent lamp, the low-pressure sodium lamp, the neon sign, ultraviolet lamps, glow indicators, and a variety of devices used by spectroscopists, such as the hollow cathode light source. The plasma conditions in representative commercial devices are described. Recent research on the electron gas, the role of heavy particles, spatial and temporal inhomogeneities, and new electrodeless excitation schemes is reviewed. Areas of future activity are expected to be in new applications of high-frequency electronics to commercial devices, new laser-based diagnostics of plasma conditions, and more sophisticated models requiring more reliable and extensive rate coefficient data.

  9. The Advanced Light Source

    SciTech Connect (OSTI)

    Jackson, A.

    1991-05-01T23:59:59.000Z

    The Advanced Light Source (ALS), a national user facility currently under construction at the Lawrence Berkeley Laboratory (LBL), is a third-generation synchrotron light source designed to produce extremely bright beams of synchrotron radiation in the energy range from a few eV to 10 keV. The design is based on a 1--1.9-GeV electron storage ring (optimized at 1.5 GeV), and utilizes special magnets, known as undulators and wigglers (collectively referred to as insertion devices), to generate the radiation. The facility is scheduled to begin operating in April 1993. In this paper we describe the progress in the design, construction, and commissioning of the accelerator systems, insertion devices, and beamlines. Companion presentations at this conference give more detail of specific components in the ALS, and describe the activities towards establishing an exciting user program. 3 figs., 2 tabs.

  10. Scattering Of Light Nuclei

    SciTech Connect (OSTI)

    Quaglioni, S; Navratil, P; Roth, R

    2009-12-15T23:59:59.000Z

    The exact treatment of nuclei starting from the constituent nucleons and the fundamental interactions among them has been a long-standing goal in nuclear physics. Above all nuclear scattering and reactions, which require the solution of the many-body quantum-mechanical problem in the continuum, represent an extraordinary theoretical as well as computational challenge for ab initio approaches.We present a new ab initio many-body approach which derives from the combination of the ab initio no-core shell model with the resonating-group method [4]. By complementing a microscopic cluster technique with the use of realistic interactions, and a microscopic and consistent description of the nucleon clusters, this approach is capable of describing simultaneously both bound and scattering states in light nuclei. We will discuss applications to neutron and proton scattering on sand light p-shell nuclei using realistic nucleon-nucleon potentials, and outline the progress toward the treatment of more complex reactions.

  11. Fusion pumped light source

    DOE Patents [OSTI]

    Pappas, Daniel S. (Los Alamos, NM)

    1989-01-01T23:59:59.000Z

    Apparatus is provided for generating energy in the form of light radiation. A fusion reactor is provided for generating a long, or continuous, pulse of high-energy neutrons. The neutron flux is coupled directly with the lasing medium. The lasing medium includes a first component selected from Group O of the periodic table of the elements and having a high inelastic scattering cross section. Gamma radiation from the inelastic scattering reactions interacts with the first component to excite the first component, which decays by photon emission at a first output wavelength. The first output wavelength may be shifted to a second output wavelength using a second liquid component responsive to the first output wavelength. The light outputs may be converted to a coherent laser output by incorporating conventional optics adjacent the laser medium.

  12. 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.

  13. U.S. - Canada Power System Outage Task Force: Final Report on...

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

    Connecticut and New Jersey, and the Canadian province of Ontario. U.S. - Canada Power System Outage Task Force: Final Report on the Implementation of Task Force...

  14. Webinar: Fuel Cell Mobile Lighting

    Broader source: Energy.gov [DOE]

    Video recording of the Fuel Cell Technologies Office webinar, Fuel Cell Mobile Lighting, originally presented on November 13, 2012.

  15. Faster than Light Quantum Communication

    E-Print Network [OSTI]

    A. Y. Shiekh

    2008-04-05T23:59:59.000Z

    Faster than light communication might be possible using the collapse of the quantum wave-function without any accompanying paradoxes.

  16. MANDATORY MEASURES OUTDOOR LIGHTING CONTROLS

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES OUTDOOR LIGHTING CONTROLS (Reference: Sub-Chapter 4, Section 130.2) #12;SECTION level of each multi-tier garage. · General lighting must have occupant sensing controls with at least one control step between 20% and 50% of design lighting power · No more than 500 watts of rated

  17. MANDATORY MEASURES OUTDOOR LIGHTING CONTROLS

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES OUTDOOR LIGHTING CONTROLS (Reference: Sub-Chapter 4, Section 130.2) #12;SECTION 5 Additions and Alterations Any alteration that increases the connected lighting load must meet all No measures required OUTDOOR LIGHTING11/20/2014 #12;SECTION 5 BACKLIGHT, UPLIGHT, AND GLARE (BUG) RATINGS

  18. STATE OF CALIFORNIA RESIDENTIAL LIGHTING

    E-Print Network [OSTI]

    STATE OF CALIFORNIA RESIDENTIAL LIGHTING CEC-CF-6R-LTG-01 (Revised 08/09) CALIFORNIA ENERGY COMMISSION INSTALLATION CERTIFICATE CF-6R-LTG-01 Residential Lighting (Page 1 of 6) Site Address: Enforcement Agency: Permit Number: 2008 Residential Compliance Forms August 2009 1. Kitchen Lighting Does project

  19. Arnold Schwarzenegger, LIGHTING RESEARCH PROGRAM

    E-Print Network [OSTI]

    ;#12;Prepared By: Lighting Research Center Andrew Bierman, Project Lead Troy, New York 12180 Managed ByArnold Schwarzenegger, Governor LIGHTING RESEARCH PROGRAM PROJECT 3.2 ENERGY EFFICIENT LOAD- SHEDDING LIGHTING TECHNOLOGY Prepared For: California Energy Commission Public Interest Energy Research

  20. Slow-light solitons revisited

    E-Print Network [OSTI]

    A. V. Rybin; I. P. Vadeiko; A. R. Bishop

    2006-08-16T23:59:59.000Z

    We investigate propagation of slow-light solitons in atomic media described by the nonlinear $\\Lambda$-model. Under a physical assumption, appropriate to the slow light propagation, we reduce the $\\Lambda$-scheme to a simplified nonlinear model, which is also relevant to 2D dilatonic gravity. Exact solutions describing various regimes of stopping slow-light solitons can then be readily derived.

  1. First interim report of the Federal Fleet Conversion Task Force

    SciTech Connect (OSTI)

    Not Available

    1993-08-01T23:59:59.000Z

    The Federal Fleet Conversion Task Force was created by Executive Order 12844, signed by President Clinton on April 21, 1993. In the Order, the President directed that purchases of alternative fueled vehicles by the Federal Government be substantially increased beyond the levels required by current law. The President charged the Task Force with developing recommendations for carrying out the Executive Order, with special emphasis on setting a course that will lead to the widespread use of alternative fueled vehicles by Federal, State, and local government fleets, by private fleets and, ultimately, by individuals. The chief recommendation of the Task Force is the establishment of a Presidential Clean Cities Initiative. To support creation of the Presidential Initiative, the Task Force identified 38 cities and regions, prioritized into three tiers, for concentrating the Initiative`s efforts in Fiscal Years 1994 through 1996. This concentration of effort is key to the effectiveness of the Initiative. The 38 cities and regions would receive priority funding for Federal vehicle purchases and for infrastructure development. In addition, the Task Force has made specific recommendations for overcoming numerous regulatory, economic, and technical barriers that have slowed the introduction of alternative fueled vehicles into general use.

  2. A comparative critical analysis of modern task-parallel runtimes.

    SciTech Connect (OSTI)

    Wheeler, Kyle Bruce; Stark, Dylan; Murphy, Richard C. [Micron Technology, Inc., Boise, ID

    2012-12-01T23:59:59.000Z

    The rise in node-level parallelism has increased interest in task-based parallel runtimes for a wide array of application areas. Applications have a wide variety of task spawning patterns which frequently change during the course of application execution, based on the algorithm or solver kernel in use. Task scheduling and load balance regimes, however, are often highly optimized for specific patterns. This paper uses four basic task spawning patterns to quantify the impact of specific scheduling policy decisions on execution time. We compare the behavior of six publicly available tasking runtimes: Intel Cilk, Intel Threading Building Blocks (TBB), Intel OpenMP, GCC OpenMP, Qthreads, and High Performance ParalleX (HPX). With the exception of Qthreads, the runtimes prove to have schedulers that are highly sensitive to application structure. No runtime is able to provide the best performance in all cases, and those that do provide the best performance in some cases, unfortunately, provide extremely poor performance when application structure does not match the scheduler's assumptions.

  3. USAMP/NonDestructive Evaluation Steering Committee (Task Team...

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

    for Nondestructive Evaluation * NDE for light-weighting Development in the North American Automotive Industry * NDE for manufacturing * Emerging challenges Hurdles to greater...

  4. Sandia National Laboratories: efficient LED lighting

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

    Partnership, Research & Capabilities, Solid-State Lighting Solid state lighting (SSL), which uses light-emitting diodes (LEDs), has the potential to be 10 times more energy...

  5. Sandia National Laboratories: Light Creation Materials

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

    TechnologiesLight Creation Materials Light Creation Materials Overview of SSL Light Creation Materials Different families of inorganic semiconductor materials can...

  6. Ecological Consequences of Artificial Night Lighting

    E-Print Network [OSTI]

    Piselli, Kathy

    2006-01-01T23:59:59.000Z

    of Artificial Night Lighting Catherine Rich and Travisof artificial night lighting. This book provides editedage of modern urban lighting was ushered in. Coincidentally,

  7. Sandia National Laboratories: Solid-State Lighting

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

    Lighting Developments to 2030 On July 30, 2012, in Lighting Technologies, Costs, and Energy Demand: Global Developments to 2030 View Slides: Lighting Technologies, Costs, and...

  8. Demand Responsive Lighting: A Scoping Study

    E-Print Network [OSTI]

    Rubinstein, Francis; Kiliccote, Sila

    2007-01-01T23:59:59.000Z

    3 3.0 Previous Experience with Demand Responsive Lighting11 4.3. Prevalence of Lighting13 4.4. Impact of Title 24 on Lighting

  9. Municipal Consortium LED Street Lighting Workshop Presentations...

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

    A Rational View of LM-79 Reports, IES Files, and Product Variation Gary Steinberg, GE Lighting Solutions Solid-State Street Lighting: Calculating Light Loss Factors Dana Beckwith,...

  10. Municipal Consortium LED Street Lighting Workshop Presentations...

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

    National Association of Energy Services Companies Calculating Light Loss Factors for Solid-State Lighting Systems Chad Stalker, Philips Lumileds Lighting Intro to MSSLC's...

  11. Light propagation and Imaging in Indefinite Metamaterials

    E-Print Network [OSTI]

    Yao, Jie

    2010-01-01T23:59:59.000Z

    photolithography by polarized light,” Applied PhysicsZhang, “Imaging visible light using anisotropic metamaterialcross-sectional review of the light propagation of TE mode (

  12. Advances in Lighting

    E-Print Network [OSTI]

    Tumber, A. J.

    1981-01-01T23:59:59.000Z

    colour rendition. The quartz-halogen incandescent lam s operate at higher temperatures, and have a somewhat higher efficacy, but they are rarely used except for special applicati ns. 3-2 High Intensity Discharge Lamps. Mercury is the grandfather... of the H.I.D. lamps. Its blue-green light, has been used almost exclusively for streetlighti and, often with colour-improving phospho it is still being used in industrial and commercial applications. Reactor-type ballasted mercury lamps can now...

  13. Pedestrian Friendly Outdoor Lighting

    SciTech Connect (OSTI)

    Miller, Naomi J.; Koltai, Rita; McGowan, Terry

    2013-12-31T23:59:59.000Z

    This GATEWAY report discusses the problems of pedestrian lighting that occur with all technologies with a focus on the unique optical options and opportunities offered by LEDs through the findings from two pedestrian-focused projects, one at Stanford University in California, and one at the Chautauqua Institution in upstate New York. Incorporating user feedback this report reviews the tradeoffs that must be weighed among visual comfort, color, visibility, efficacy and other factors to stimulate discussion among specifiers, users, energy specialists, and in industry in hopes that new approaches, metrics, and standards can be developed to support pedestrian-focused communities, while reducing energy use.

  14. Lighting Test Facilities

    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: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let us countLighting Sign In About

  15. Lighting | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |Jilin ZhongdiantouLichuan City Yujiang River ValleyLighting

  16. Job Task Analysis: Building Commissioning Professional; November 2013 - December 2014

    SciTech Connect (OSTI)

    Woodley, C.; DePascale, C.

    2015-01-01T23:59:59.000Z

    This report describes the process for and results of a comprehensive job task analysis of Building Commissioning Professionals. This study was performed by Professional Testing on behalf of the National Renewable Energy Laboratory (NREL). The competency (domains, tasks and associated knowledge) list, which defines the work performed by practitioners, was initially developed by a representative panel of practitioners during a meeting held on February 19?21, 2014 in Orlando Florida. Following the identification of the job tasks and associated knowledge and skills, a validation survey was conducted of the finding of the JTA and the results of the validation study were reviewed by a representative panel of practitioners during a conference call held on June 6, 2014. The committee finalized the JTA and examination blueprints for the Building Commissioning credential scheme based on the survey results.

  17. Algorithms for Temperature-Aware Task Scheduling in Microprocessor Systems

    E-Print Network [OSTI]

    Chrobak, Marek; Hurand, Mathilde; Robert, Julien

    2008-01-01T23:59:59.000Z

    We study scheduling problems motivated by recently developed techniques for microprocessor thermal management at the operating systems level. The general scenario can be described as follows. The microprocessor's temperature is controlled by the hardware thermal management system that continuously monitors the chip temperature and automatically reduces the processor's speed as soon as the thermal threshold is exceeded. Some tasks are more CPU-intensive than other and thus generate more heat during execution. The cooling system operates non-stop, reducing (at an exponential rate) the deviation of the processor's temperature from the ambient temperature. As a result, the processor's temperature, and thus the performance as well, depends on the order of the task execution. Given a variety of possible underlying architectures, models for cooling and for hardware thermal management, as well as types of tasks, this scenario gives rise to a plethora of interesting and never studied scheduling problems. We focus on s...

  18. Job Task Analysis: Energy Manager; November 2013 - December 2014

    SciTech Connect (OSTI)

    Woodley, C. D.

    2015-01-01T23:59:59.000Z

    This report describes the process for and results of a comprehensive job task analysis of Energy Managers. This study was performed by Professional Testing on behalf of the National Renewable Energy Laboratory (NREL). The competency (domains, tasks and associated knowledge) list, which defines the work performed by practitioners, was initially developed by a representative panel of practitioners during a meeting held on January 22?24, 2014 in Orlando Florida. Following the identification of the job tasks and associated knowledge and skills, a validation survey was conducted of the finding of the JTA and the results of the validation study were reviewed by a representative panel of practitioners during a conference call held on June 2, 2014. The committee finalized the JTA and examination blueprints for the Energy Manager credential scheme based on the survey results.

  19. Job Task Analysis: Building Energy Auditor; November 2013 - December 2014

    SciTech Connect (OSTI)

    Woodley, C. D.

    2015-01-01T23:59:59.000Z

    This report describes the process for and results of a comprehensive job task analysis of Energy Auditors. This study was performed by Professional Testing on behalf of the National Renewable Energy Laboratory (NREL). The competency (domains, tasks and associated knowledge) list, which defines the work performed by practitioners, was initially developed by a representative panel of practitioners during a meeting held on February 3?5, 2014 in Orlando Florida. Following the identification of the job tasks and associated knowledge and skills, a validation survey was conducted of the finding of the JTA and the results of the validation study were reviewed by a representative panel of practitioners during a conference call held on May 29, 2014. The committee finalized the JTA and examination blueprints for the Energy Auditor credential scheme based on the survey results.

  20. Energy-Aware Task Partitioning on Heterogeneous Multiprocessor Platforms

    E-Print Network [OSTI]

    Saad, Elsayed; Shalan, Mohamed; Elewi, Abdullah

    2012-01-01T23:59:59.000Z

    Efficient task partitioning plays a crucial role in achieving high performance at multiprocessor plat forms. This paper addresses the problem of energy-aware static partitioning of periodic real-time tasks on heterogeneous multiprocessor platforms. A Particle Swarm Optimization variant based on Min-min technique for task partitioning is proposed. The proposed approach aims to minimize the overall energy consumption, meanwhile avoid deadline violations. An energy-aware cost function is proposed to be considered in the proposed approach. Extensive simulations and comparisons are conducted in order to validate the effectiveness of the proposed technique. The achieved results demonstrate that the proposed partitioning scheme significantly surpasses previous approaches in terms of both number of iterations and energy savings.

  1. Job Task Analysis: Building Operations Professional; February - December 2014

    SciTech Connect (OSTI)

    Woodley, C. D.

    2015-01-01T23:59:59.000Z

    This report describes the process for and results of a comprehensive job task analysis of Building Operations Professionals. This study was performed by Professional Testing on behalf of the National Renewable Energy Laboratory (NREL). The competency (domains, tasks and associated knowledge) list, which defines the work performed by practitioners, was initially developed by a representative panel of practitioners during a meeting held on February 10-12, 2014 in Orlando Florida. Following the identification of the job tasks and associated knowledge and skills, a validation survey was conducted of the finding of the JTA and the results of the validation study were reviewed by a representative panel of practitioners during a conference call held on May 30, 2014. The committee finalized the JTA and examination blueprints for the Building Operations Professional credential scheme based on the survey results.

  2. Motor-output variability in a ballistic task

    E-Print Network [OSTI]

    Weeks, Douglas Lane

    1981-01-01T23:59:59.000Z

    MOTOR-OUTPUT VARIABILIT'f IN A BALLISTIC TASK A Thesis by DOUGLAS LANE WEEKS Submitted to the Graduate College of Texas ASM University in partsal fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1981 Major Subject...: Physical Education MOTOR-OUTPUT VARIABILITY IN A BALLISTIC TASK A Thesis by DOUGLAS LANE WEEKS Approved as to style and content by: Chairman of Committee , ember C ee. yc ace Member )g p~ Head of Department August 1981 ADS!RACT !Notor...

  3. JV Task 120 - Coal Ash Resources Research Consortium Research

    SciTech Connect (OSTI)

    Debra Pflughoeft-Hassett; Loreal Heebink; David Hassett; Bruce Dockter; Kurt Eylands; Tera Buckley; Erick Zacher

    2009-03-28T23:59:59.000Z

    The Coal Ash Resources Research Consortium{reg_sign} (CARRC{reg_sign}, pronounced 'cars') is the core coal combustion product (CCP) research group at the Energy & Environmental Research Center (EERC). CARRC focuses on performing fundamental and applied scientific and engineering research emphasizing the environmentally safe, economical use of CCPs. CARRC member organizations, which include utilities and marketers, are key to developing industry-driven research in the area of CCP utilization and ensuring its successful application. The U.S. Department of Energy is a partner in CARRC through the EERC Jointly Sponsored Research Program, which provides matching funds for industrial member contributions and facilitates an increased level of effort in CARRC. CARRC tasks were designed to provide information on CCP performance, including environmental performance, engineering performance, favorable economics, and improved life cycle of products and projects. CARRC technical research tasks are developed based on member input and prioritization. CARRC special projects are developed with members and nonmembers to provide similar information and to support activities, including the assembly and interpretation of data, support for standards development and technology transfer, and facilitating product development and testing. CARRC activities from 2007 to 2009 included a range of research tasks, with primary work performed in laboratory tasks developed to answer specific questions or evaluate important fundamental properties of CCPs. The tasks were included in four categories: (1) Environmental Evaluations of CCPs; (2) Evaluation of Impacts on CCPs from Emission Controls; (3) Construction and Product-Related Activities; and (4) Technology Transfer and Maintenance Tasks. All tasks are designed to work toward achieving the CARRC overall goal and supporting objectives. The various tasks are coordinated in order to provide broad and useful technical data for CARRC members. Special projects provide an opportunity for non-CARRC members to sponsor specific research or technology transfer consistent with CARRC goals. This report covers CARRC activities from January 2007 through March 2009. These activities have been reported in CARRC Annual Reports and in member meetings over the past 2 years. CARRC continues to work with industry and various government agencies with its research, development, demonstration, and promotional activities nearing completion at the time of submission of this report. CARRC expects to continue its service to the coal ash industry in 2009 and beyond to work toward the common goal of advancing coal ash utilization by solving CCP-related technical issues and promoting the environmentally safe, technically sound, and economically viable management of these complex and changing materials.

  4. Using Multiple Unmanned Systems for a Site Security Task

    SciTech Connect (OSTI)

    Matthew O. Anderson; Curtis W. Nielsen; Mark D. McKay; Derek C. Wadsworth; Ryan C. Hruska; John A. Koudelka

    2009-04-01T23:59:59.000Z

    Unmanned systems are often used to augment the ability of humans to perform challenging tasks. While the value of individual unmanned vehicles have been proven for a variety of tasks, it is less understood how multiple unmanned systems should be used together to accomplish larger missions such as site security. The purpose of this paper is to discuss efforts by researchers at the Idaho National Laboratory (INL) to explore the utility and practicality of operating multiple unmanned systems for a site security mission. This paper reviews the technology developed for a multi-agent mission and summarizes the lessons-learned from a technology demonstration.

  5. LCA (Life Cycle Assessment) of Parabolic Trough CSP: Materials Inventory and Embodied GHG Emissions from Two-Tank Indirect and Thermocline Thermal Storage (Presentation)

    SciTech Connect (OSTI)

    Heath, G.; Burkhardt, J.; Turchi, C.; Decker, T.; Kutscher, C.

    2009-07-20T23:59:59.000Z

    In the United States, concentrating solar power (CSP) is one of the most promising renewable energy (RE) technologies for reduction of electric sector greenhouse gas (GHG) emissions and for rapid capacity expansion. It is also one of the most price-competitive RE technologies, thanks in large measure to decades of field experience and consistent improvements in design. One of the key design features that makes CSP more attractive than many other RE technologies, like solar photovoltaics and wind, is the potential for including relatively low-cost and efficient thermal energy storage (TES), which can smooth the daily fluctuation of electricity production and extend its duration into the evening peak hours or longer. Because operational environmental burdens are typically small for RE technologies, life cycle assessment (LCA) is recognized as the most appropriate analytical approach for determining their environmental impacts of these technologies, including CSP. An LCA accounts for impacts from all stages in the development, operation, and decommissioning of a CSP plant, including such upstream stages as the extraction of raw materials used in system components, manufacturing of those components, and construction of the plant. The National Renewable Energy Laboratory (NREL) is undertaking an LCA of modern CSP plants, starting with those of parabolic trough design.

  6. Critical cavity in the stretched fluid studied using square-gradient density-functional model with triple-parabolic free energy

    E-Print Network [OSTI]

    Masao Iwamatsu

    2009-04-04T23:59:59.000Z

    The generic square-gradient density-functional model with triple-parabolic free energy is used to study the stability of a cavity introduced into the stretched liquid. The various properties of the critical cavity, which is the largest stable cavity within the liquid, are compared with those of the critical bubble of the homogeneous bubble nucleation. It is found that the size of the critical cavity is always smaller than that of the critical bubble, while the work of formation of the former is always higher than the latter in accordance with the conjectures made by Punnathanam and Corti [J. Chem. Phys. {\\bf 119}, 10224 (2003)] deduced from the Lennard-Jones fluids. Therefore their conjectures about the critical cavity size and the work of formation would be more general and valid even for other types of liquid such as metallic liquid or amorphous. However, the scaling relations they found for the critical cavity in the Lennard-Jones fluid are marginally satisfied only near the spinodal.

  7. Table lamp with dynamically controlled lighting distribution and uniformly illuminated luminous shade

    DOE Patents [OSTI]

    Siminovitch, Michael J. (Pinole, CA); Page, Erik R. (Berkeley, CA)

    2002-01-01T23:59:59.000Z

    A double lamp table or floor lamp lighting system has a pair of compact fluorescent lamps (CFLs) or other lamps arranged vertically, i.e. one lamp above the other, with a reflective septum in between. By selectively turning on one or both of the CFLs, down lighting, up lighting, or both up and down lighting is produced. The control system can also vary the light intensity from each CFL. The reflective septum ensures that almost all the light produced by each lamp will be directed into the desired light distribution pattern which is selected and easily changed by the user. In a particular configuration, the reflective septum is bowl shaped, with the upper CFL sitting in the bowl, and a luminous shade hanging down from the bowl. The lower CFL provides both task lighting and uniform shade luminance. Planar compact fluorescent lamps, e.g. circular CFLs, particularly oriented horizontally, are preferable. CFLs provide energy efficiency. However, other types of lamps, including incandescent, halogen, and LEDs can also be used in the fixture. The lighting system may be designed for the home, hospitality, office or other environments.

  8. Combined Scheduling of Hard and Soft Real-Time Tasks in Multiprocessor Systems

    E-Print Network [OSTI]

    Manimaran, Govindarasu

    Combined Scheduling of Hard and Soft Real-Time Tasks in Multiprocessor Systems B. Duwairi and G to support combined scheduling of hard and soft real-time tasks in such systems, in which multiprocessors with periodic soft tasks. Scheduling any of these task combinations in multiprocessor systems is a #12

  9. Verification of the Equilibrium and MHD Stability Codes within the Integrated Tokamak Modeling Task Force

    E-Print Network [OSTI]

    Verification of the Equilibrium and MHD Stability Codes within the Integrated Tokamak Modeling Task Force

  10. TTL inter-task communication implementation on a shared-memory multiprocessor platform

    E-Print Network [OSTI]

    Kuzmanov, Georgi

    for implementing streaming applica- tions on multi-processor architectures. Inter-task communi- cation (ITC- mentation of inter-task communication (ITC) among soft- ware tasks only. The definition of the TTL ITC can the channel. Tasks connect to the channel through ports. A token is a variable holding a value that is com

  11. Posters | Posters --721 Exploring lighting cultures

    E-Print Network [OSTI]

    Boyer, Edmond

    Posters | Posters -- 721 Exploring lighting cultures Beyond light and emotions Vincent LAGANIER 1 , Jasmine van der POL 2 1. Lighting Applications Services (LiAS), Philips Lighting, France vincent.laganier@philips.com 2

  12. LIGHTING CONTROLS: SURVEY OF MARKET POTENTIAL

    E-Print Network [OSTI]

    Verderber, R.R.

    2010-01-01T23:59:59.000Z

    Floors Floor Area Lighting Power Density Light Output Lampenergy den- sity and power density for lighting to 3.5 kWh/Lighting Level (Lumens/Watt) (Footcandles) Power Density (

  13. Low-Pressure Sodium Lighting Basics

    Broader source: Energy.gov [DOE]

    Low-pressure sodium lighting provides more energy-efficient outdoor lighting than high-intensity discharge lighting, but it has very poor color rendition. Typical applications include highway and security lighting, where color is not important.

  14. Radioluminescent lighting for Alaskan runway lighting and marking

    SciTech Connect (OSTI)

    Jensen, G.A.; Leonard, L.E.

    1985-03-01T23:59:59.000Z

    Alaska and other far northern areas have special logistical, environmental, and economic problems that make radioluminescent (RL) lighting applications, especially in the area of airport lighting, an attractive alternative to electrical systems and flare pots. Tests and demonstrations of prototype systems conducted in Alaska over the past two years have proved the basic technological worth of RL airport lighting systems for civilian and military use. If regulatory issues and other factors identified during these tests can be favorably resolved and if the system and its components can be refined through production engineering, attractive applications for RL airfield lighting systems in Alaska and other remote locations could result.

  15. Energy Savings Estimates of Light Emitting Diodes in Niche Lighting...

    Office of Environmental Management (EM)

    in Niche Lighting Applications Prepared for: Building Technologies Program Office of Energy Efficiency and Renewable Energy U.S. Department of Energy Prepared by: Navigant...

  16. Auction Equilibrium Strategies for Task Allocation in Uncertain Environments

    E-Print Network [OSTI]

    Kraus, Sarit

    concerning coopera- tive agents aiming for a joint goal are not applicable in such environ- ments, since self, a company, etc., operating in a dynamic environment and lacking the required re- sources to performAuction Equilibrium Strategies for Task Allocation in Uncertain Environments David Sarne1 , Meirav

  17. Urban Consortium Energy Task Force - Year 21 Final Report

    SciTech Connect (OSTI)

    NONE

    2003-04-01T23:59:59.000Z

    The Urban Consortium Energy Task Force (UCETF), comprised of representatives of large cities and counties in the United States, is a subgroup of the Urban Consortium, an organization of the nation's largest cities and counties joined together to identify, develop and deploy innovative approaches and technological solutions to pressing urban issues.

  18. Bimanual coordination as task-dependent linear control policies

    E-Print Network [OSTI]

    Diedrichsen, Jörn

    Bimanual coordination as task-dependent linear control policies Jörn Diedrichsen *, Noreen Dowling Feedback control Modelling Bimanual a b s t r a c t When we perform actions with two hands in everyday life have previously shown that feedback control, the struc- ture of noise, and adaptation change between

  19. Communication tasks with infinite quantum-classical separation

    E-Print Network [OSTI]

    Christopher Perry; Rahul Jain; Jonathan Oppenheim

    2015-03-03T23:59:59.000Z

    Quantum resources can be more powerful than classical resources - a quantum computer can solve certain problems exponentially faster than a classical computer, and computing a function of two people's inputs can be done with exponentially less communication with quantum messages than with classical ones. Here we consider a task between two players, Alice and Bob where quantum resources are infinitely more powerful than classical ones. Alice is given a string of length n, and Bob's task is to exclude certain combinations of bits that Alice might have. If Alice must send classical messages, then she must reveal nearly n bits of information to Bob, but if she is allowed to send quantum bits, the amount of information she must reveal goes to zero with increasing n. Next, we consider a version of the task where the parties can only send classical messages but may have access to entanglement. When assisted by entanglement, Alice only needs to send a constant number of bits, while without entanglement, the number of bits Alice must send grows linearly with n. The task is related to the PBR theorem which arises in the context of the foundations of quantum theory.

  20. Cooperative Task Assignment of Unmanned Aerial Vehicles in Adversarial Environments

    E-Print Network [OSTI]

    How, Jonathan P.

    stochastic formulation of the UAV task assignment problem. This formulation ex- plicitly accounts to maximize the mission value as an expectation, this stochastic formulation designs coordinated plans are not constant and change with time due to the removal of SAM sites by other UAVs. This allocation recovers

  1. Recognition, Prediction, and Planning for Assisted Teleoperation of Freeform Tasks

    E-Print Network [OSTI]

    Indiana University

    --This paper presents a system for improving the intuitiveness and responsiveness of assisted robot of assistance [1, 11, 16, 17, 19]. In this approach, the robot estimates the operator's intent using the rawRecognition, Prediction, and Planning for Assisted Teleoperation of Freeform Tasks Kris Hauser

  2. On the Effect of Compliance in Robotic Contact Tasks Problem

    E-Print Network [OSTI]

    1 1995 ACC On the Effect of Compliance in Robotic Contact Tasks Problem Shahram Payandeh, Assistant Professor Experimental Robotics Laboratory (ERL) School of Engineering Science Simon Fraser University control of the robotic manipulator during its phase transition from free to constrained motions. One

  3. CCB Inventory Guide To Frequent Tasks (rev. 7/2011)

    E-Print Network [OSTI]

    Heller, Eric

    CCB Inventory Guide To Frequent Tasks (rev. 7/2011) To enter the CCB-Cambridgesoft Chemical Inventory system 1. Launch Internet Explorer 7 or later (important barcodes in the location, and will compare that with the inventory data 4. System

  4. Report on Solar Combisystems Modelled in Task 26 Appendix 1

    E-Print Network [OSTI]

    combisystem 1.1 Main features This system is derived from a standard solar domestic-hot-water system-heating heat exchanger. In summer an immersed electric heater can supply additional heat to the hot water higher #12;IEA SHC ­ Task 26 ­ Solar Combisystems 6 than the set-point temperature). When the domestic-hot-water

  5. Final Research Report Contract T1805, Task 22

    E-Print Network [OSTI]

    STATEMENT cellular automata, traffic modeling, dynamic simulation, prediction, control, ramp meteringFinal Research Report Contract T1805, Task 22 Cellular Automata A Cellular Automata Model for Use. RECIPIENT'S CATALOG NO. WA-RD 537.1 4. TITLE AND SUBTITLE 5. REPORT DATE A CELLULAR AUTOMATA MODEL FOR USE

  6. Analysis of Dynamic Task Allocation in Multi-Robot Systems

    E-Print Network [OSTI]

    Lerman, Kristina

    coordination algorithms difficult to design. In this paper we present a mathematical model of a general dynamic) has greatly benefited from the formalisms provided by control theory ­ the design of MRS is in need task to choose based on these observations. We model the robots and observa- tions as stochastic

  7. An Availability-Aware Task Scheduling Strategy for Heterogeneous Systems

    E-Print Network [OSTI]

    Xie, Tao

    An Availability-Aware Task Scheduling Strategy for Heterogeneous Systems Xiao Qin, Member, IEEE, and Tao Xie, Member, IEEE Abstract--High availability is a key requirement in the design and development of heterogeneous systems where processors operate at different speeds and are not continuously available

  8. Report of the Task Force on Faculty Diversity and Inclusiveness

    E-Print Network [OSTI]

    Mahon, Bradford Z.

    faculty search committees or to inform search committees themselves on best practices for increasing care demands affect tenure track faculty in unique ways; and many of our peer institutions a more diverse and inclusive institution. In response, the Task Force proposes 31 recommendations

  9. A Multi Faceted Recommendation Approach for Explorative Video Retrieval Tasks

    E-Print Network [OSTI]

    (D). The users enter a text based query in the search panel to begin their search. The result panel's task. Author Keywords: Video, collaborative, recommendation, exploratory, search. ACM Classification Keywords: H.5.1 Multimedia Infor- mation Systems, H.5.3 Group and Organization Interfaces General Terms

  10. The Tradeoff between Spatial Jitter and Latency in Pointing Tasks

    E-Print Network [OSTI]

    Stürzlinger, Wolfgang

    The Tradeoff between Spatial Jitter and Latency in Pointing Tasks Andriy Pavlovych Wolfgang and investigate the effects of input device latency and spatial jitter on 2D pointing speed and accuracy. First, we characterize the latency and jitter of several common input devices. Then we present an experiment

  11. TASK ALLOCATION METHODOLOGIES FOR MULTI-ROBOT SYSTEMS

    E-Print Network [OSTI]

    Kansas, University of

    . In addition, groups of robots provide a level of robustness, fault tolerance, and flexibility, as the failure and fault tolerance is required. In addition, the study of multi-robot systems can help in better of the type of cooperation, the goal of the team must be transformed into tasks to be allocated

  12. Task Allocation onto a Hypercube by Recursive Mincut Bipartitioning

    E-Print Network [OSTI]

    Ramanujam, J. "Ram"

    ­SBIR program through Universal Energy Systems, Inc. (S­776­000­001) and by the State of Ohio through the Thomas uppercase delta T Italic letter (capital) ``tee'' ff Greek lowercase alpha fi Greek lowercase beta fi l Greek lowercase beta superscript ``ell'' fi u Greek lowercase beta superscript ``you'' #12; Task

  13. Grid Computing Workloads: Bags of Tasks, Workflows, Pilots, and Others

    E-Print Network [OSTI]

    Iosup, Alexandru

    1 Grid Computing Workloads: Bags of Tasks, Workflows, Pilots, and Others Alexandru Iosup and Dick, the Netherlands Contact info: A.Iosup@tudelft.nl, D.H.J.Epema@tudelft.nl Abstract--In the mid 1990s, the grid computing com- munity promised the "compute power grid," a utility com- puting infrastructure for scientists

  14. Toward Optimal Allocation of Location Dependent Tasks in Crowdsensing

    E-Print Network [OSTI]

    Reisslein, Martin

    , Junshan Zhang, Jiming Chen School of Electrical, Computer, and Energy Engineering, Arizona State and market demand (i.e., the number of mobile users who intend to perform the task). Extensive simulation the movement, and are uploaded to a backend cloud. They are then fused and visualized. Common Sense provides

  15. Suggested drilling research tasks for the Federal Government

    SciTech Connect (OSTI)

    Carson, C.C.

    1984-04-01T23:59:59.000Z

    A brief summary discussion of drilling, drilling research and the role of the government in drilling research is presented. Specific research and development areas recommended for federal consideration are listed. The technical nature of the identified tasks is emphasized. The Appendices present the factual basis for the discussion and recommendations. Numerous references are noted in the Appendices.

  16. Negotiating Task Interruptions with Virtual Agents for Health Behavior Change

    E-Print Network [OSTI]

    Bickmore, Timothy

    and chronic disease in the United States [18]. In addition, adherence to prescribed treatments, such as lack of physical activity and unhealthy dietary habits, are among the leading causes of death rate. However, as many recent studies in task interruption have shown, responsiveness

  17. 32 TaskSpaces: A Software Framework for Parallel

    E-Print Network [OSTI]

    De Sterck, Hans

    and Computational Biology, A. Zomaya, editor, John Wiley and Sons, 2005. i #12;Contents 32 Parallel Bioinformatics32 TaskSpaces: A Software Framework for Parallel Bioinformatics on Computational Grids HANS DE, there is a natural drive towards applying parallel and distributed computing to bioinformatics problems. Grid

  18. Business Association Joint Task Force Position on Higher Education December 2010 Business Association Joint Task Force Position on Higher Education December 2010 1

    E-Print Network [OSTI]

    Escher, Christine

    Business Association Joint Task Force Position on Higher Education ­ December 2010 Business Association Joint Task Force Position on Higher Education ­ December 2010 1 Joint Business Association Task Force on Higher Education Summary The four business associations, Associated Oregon Industries, Oregon

  19. Purging the Task Pump on the 800 Cold Probe Occasionally the task pump in the 800 cryobay will not pull a sufficient

    E-Print Network [OSTI]

    Oliver, Douglas L.

    Purging the Task Pump on the 800 Cold Probe Occasionally the task pump in the 800 cryobay will not pull a sufficient vacuum to start the cold probe. When this happens the pump may need to have a N2 panels off the cryobay and place somewhere safe · Make sure the task pump is off. If it is still running

  20. Embodied Energy and Off-Grid Lighting

    E-Print Network [OSTI]

    Alstone, Peter

    2012-01-01T23:59:59.000Z

    as a point of comparison with LED lighting product embodieda fairer comparison between off- grid LED lighting and other

  1. Northeast Energy Efficiency Partnerships: Advanced Lighting Controls...

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

    Northeast Energy Efficiency Partnerships: Advanced Lighting Controls - 2015 Peer Review Northeast Energy Efficiency Partnerships: Advanced Lighting Controls - 2015 Peer Review...

  2. Overcoming Common Pitfalls: Energy Efficient Lighting Projects...

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

    Overcoming Common Pitfalls: Energy Efficient Lighting Projects Overcoming Common Pitfalls: Energy Efficient Lighting Projects Transcript Presentation More Documents & Publications...

  3. Light Meson Distribution Amplitudes

    E-Print Network [OSTI]

    R. Arthur; P. A. Boyle; D. Brömmel; M. A. Donnellan; J. M. Flynn; A. Jüttner; H. Pedroso de Lima; T. D. Rae; C. T. Sachrajda; B. Samways

    2010-11-12T23:59:59.000Z

    We calculated the first two moments of the light-cone distribution amplitudes for the pseudoscalar mesons ($\\pi$ and $K$) and the longitudinally polarised vector mesons ($\\rho$, $K^*$ and $\\phi$) as part of the UKQCD and RBC collaborations' $N_f=2+1$ domain-wall fermion phenomenology programme. These quantities were obtained with a good precision and, in particular, the expected effects of $SU(3)$-flavour symmetry breaking were observed. Operators were renormalised non-perturbatively and extrapolations to the physical point were made, guided by leading order chiral perturbation theory. The main results presented are for two volumes, $16^3\\times 32$ and $24^3\\times 64$, with a common lattice spacing. Preliminary results for a lattice with a finer lattice spacing, $32^3\\times64$, are discussed and a first look is taken at the use of twisted boundary conditions to extract distribution amplitudes.

  4. Light modulating device

    DOE Patents [OSTI]

    Rauh, R.D.; Goldner, R.B.

    1989-12-26T23:59:59.000Z

    In a device for transmitting light, means for controlling the transmissivity of the device, including a ceramic, reversibly electrochromic, crystalline element having a highly reflective state when injected with electrons and charge compensating ions and a highly transmissive state when the electrons and ions are removed, the crystalline element being characterized as having a reflectivity of at least 50% in the reflective state and not greater than 10% in the transmissive state, and means for modulating the crystalline element between the reflective and transmissive states by injecting ions into the crystalline element in response to an applied electrical current of a first polarity and removing the ions in response to an applied electrical current of a second polarity are disclosed. 1 fig.

  5. Energy and lighting

    SciTech Connect (OSTI)

    Berman, S.

    1985-01-01T23:59:59.000Z

    Advances in research for new types of lighting with increased efficacies (lumens/watt) are discussed in the following areas: (1) high-frequency, solid-state ballasts, (2) isotopic enhancement of mercury isotopes, (3) magnetic augmentation, (4) electrodeless, ultra-high frequency, (5) tuned phosphors, (6) two-photon phosphors, (7) heat mirrors, and (3) advanced control circuits to take advantage of daylight and occupancy. As of 1985, improvements in efficacy have been accomplished on an economic basis to save energy for (1) high-frequency ballasts (25%), (2) isotopic enhancement (5%), and (8) advanced control circuits (up to 50%). Most of these advances depend on a deeper understanding of the weakly ionized plasma as a radiating and diffusing medium. 3 figures, 4 tables.

  6. Light modulating device

    DOE Patents [OSTI]

    Rauh, R. David (Newton, MA); Goldner, Ronald B. (Lexington, MA)

    1989-01-01T23:59:59.000Z

    In a device for transmitting light, means for controlling the transmissivity of the device, including a ceramic, reversibly electrochromic, crystalline element having a highly reflective state when injected with electrons and charge compensating ions and a highly transmissive state when the electrons and ions are removed, the crystalline element being characterized as having a reflectivity of at least 50% in the reflective state and not greater than 10% in the transmissive state, and means for modulating the crystalline element between the reflective and transmissive states by injecting ions into the crystalline element in response to an applied electrical current of a first polarity and removing the ions in response to an applied electrical current of a second polarity.

  7. Ultrafast Magnetic Light

    E-Print Network [OSTI]

    Makarov, Sergey V; Krasnok, Alexander E; Belov, Pavel A

    2015-01-01T23:59:59.000Z

    We propose a novel concept for efficient dynamic tuning of optical properties of a high refractive index subwavelength nanoparticle with a magnetic Mie-type resonance by means of femtosecond laser radiation. This concept is based on ultrafast generation of electron-hole plasma within such nanoparticle, drastically changing its transient dielectric permittivity. This allows to manipulate by both electric and magnetic nanoparticle responses, resulting in dramatic changes of its extinction cross section and scattering diagram. Specifically, we demonstrate the effect of ultrafast switching-on a Huygens source in the vicinity of the magnetic dipole resonance. This approach enables to design ultrafast and compact optical switchers and modulators based on the "ultrafast magnetic light" concept.

  8. Automatic Mechetronic Wheel Light Device

    DOE Patents [OSTI]

    Khan, Mohammed John Fitzgerald (Silver Spring, MD)

    2004-09-14T23:59:59.000Z

    A wheel lighting device for illuminating a wheel of a vehicle to increase safety and enhance aesthetics. The device produces the appearance of a "ring of light" on a vehicle's wheels as the vehicle moves. The "ring of light" can automatically change in color and/or brightness according to a vehicle's speed, acceleration, jerk, selection of transmission gears, and/or engine speed. The device provides auxiliary indicator lights by producing light in conjunction with a vehicle's turn signals, hazard lights, alarm systems, and etc. The device comprises a combination of mechanical and electronic components and can be placed on the outer or inner surface of a wheel or made integral to a wheel or wheel cover. The device can be configured for all vehicle types, and is electrically powered by a vehicle's electrical system and/or battery.

  9. anticorrelation light yield: Topics by E-print Network

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

    for Light Engineering Websites Summary: Smart lighting: New Roles for Light in the Solid State Lighting World Robert F. Karlicek, Jr as the largest supplier of LED Lighting...

  10. LED Lighting Off the Grid

    Energy Savers [EERE]

    D. & Kammen, D. M. Decentralized energy systems for clean electricity access. Nature Climate Change accepted, in press, (2015). Off-Grid Status Quo : Fuel Based Lighting...

  11. Pedestrian-Friendly Nighttime Lighting

    Broader source: Energy.gov [DOE]

    This November 19, 2013 webinar presented issues and considerations related to pedestrian-friendly nighttime lighting, such as color rendering, safety, and adaptation. When it comes to outdoor...

  12. Linac Coherent Light Source Overview

    Broader source: Energy.gov [DOE]

    Take an animated tour of the Linac Coherent Light Source (LCLS). Follow the laser pulse from the injector gun all the way through to the Far Experimental Hall.

  13. Linac Coherent Light Source Overview

    SciTech Connect (OSTI)

    None

    2010-01-01T23:59:59.000Z

    Take an animated tour of the Linac Coherent Light Source (LCLS). Follow the laser pulse from the injector gun all the way through to the Far Experimental Hall.

  14. Utility lighting summit proves illuminating

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

    Utility-lighting-summit-proves-illuminating Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects...

  15. Linac Coherent Light Source Overview

    ScienceCinema (OSTI)

    None

    2013-05-29T23:59:59.000Z

    Take an animated tour of the Linac Coherent Light Source (LCLS). Follow the laser pulse from the injector gun all the way through to the Far Experimental Hall.

  16. Lighting with Paint FABIO PELLACINI

    E-Print Network [OSTI]

    Pellacini, Fabio

    Lighting with Paint FABIO PELLACINI Dartmouth College and FRANK BATTAGLIA, R. KEITH MORLEY, animation, rendering, optimization, painting ACM Reference Format: Pellacini, F., Battaglia, F., Morley, R

  17. Arnold Schwarzenegger LIGHTING RESEARCH PROGRAM

    E-Print Network [OSTI]

    Institute; David Shiller, Environmental Protection Agency. Program Advisory Committee: Ron Lewis Corporation; Don Aumann, California Lighting Technology Center; Holly Larsen, Larsen Communications

  18. Light-by-Light Scattering Effect in Light-Cone Supergraphs

    E-Print Network [OSTI]

    Renata Kallosh; Pierre Ramond

    2010-06-24T23:59:59.000Z

    We give a relatively simple explanation of the light-cone supergraph prediction for the UV properties of the maximally supersymmetric theories. It is based on the existence of a dynamical supersymmetry which is not manifest in the light-cone supergraphs. It suggests that N=4 supersymmetric Yang-Mills theory is UV finite and N=8 supergravity is UV finite at least until 7 loops whereas the $n$-point amplitudes have no UV divergences at least until $L=n+3$. Here we show that this prediction can be deduced from the properties of light-cone supergraphs analogous to the light-by-light scattering effect in QED. A technical aspect of the argument relies on the observation that the dynamical supersymmetry action is, in fact, a compensating field-dependent gauge transformation required for the retaining the light-cone gauge condition $A_+=0$.

  19. Light Trapping for High Efficiency Heterojunction Crystalline Si Solar Cells: Preprint

    SciTech Connect (OSTI)

    Wang, Q.; Xu, Y.; Iwaniczko, E.; Page, M.

    2011-04-01T23:59:59.000Z

    Light trapping plays an important role to achieve high short circuit current density (Jsc) and high efficiency for amorphous/crystalline Si heterojunction solar cells. Si heterojunction uses hydrogenated amorphous Si for emitter and back contact. This structure of solar cell posses highest open circuit voltage of 0.747 V at one sun for c-Si based solar cells. It also suggests that over 25% record-high efficiency is possible with further improvement of Jsc. Light trapping has two important tasks. The first one is to reduce the surface reflectance of light to zero for the solar spectrum that Si has a response. The second one is to increase the effective absorption length to capture all the photon. For Si heterojunction solar cell, surface texturing, anti-reflectance indium tin oxides (ITO) layer at the front and back are the key area to improve the light trapping.

  20. System and method for seamless task-directed autonomy for robots

    DOE Patents [OSTI]

    Nielsen, Curtis; Bruemmer, David; Few, Douglas; Walton, Miles

    2012-09-18T23:59:59.000Z

    Systems, methods, and user interfaces are used for controlling a robot. An environment map and a robot designator are presented to a user. The user may place, move, and modify task designators on the environment map. The task designators indicate a position in the environment map and indicate a task for the robot to achieve. A control intermediary links task designators with robot instructions issued to the robot. The control intermediary analyzes a relative position between the task designators and the robot. The control intermediary uses the analysis to determine a task-oriented autonomy level for the robot and communicates target achievement information to the robot. The target achievement information may include instructions for directly guiding the robot if the task-oriented autonomy level indicates low robot initiative and may include instructions for directing the robot to determine a robot plan for achieving the task if the task-oriented autonomy level indicates high robot initiative.

  1. Fiscal Year 2005 Solar Radiometry and Metrology Task Accomplishments

    SciTech Connect (OSTI)

    Myers, D.; Andreas, A.; Reda, I.; Gotseff, P.; Wilcox, S.; Stoffel, T.; Anderberg, M.; Kay, B.; Bowen, A.

    2005-11-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL) Solar Radiometry and Metrology task provides traceable optical radiometric calibrations and measurements to photovoltaic (PV) researchers and the PV industry. Traceability of NREL solar radiometer calibrations to the World Radiometric Reference (WRR) was accomplished during Pyrheliometer Comparison at NREL in October 2004. Ten spectral and more than 200 broadband radiometers for solar measurements were calibrated this year. We measured detailed spectral distributions of the NREL and PV industry Pulsed Solar Simulators and are analyzing the influence of environmental variables on radiometer uncertainty. New systems for indoor and outdoor solar radiometer calibrations and ultraviolet (UV) spectral measurements and UV radiometer calibrations were purchased and tested. Optical metrology functions support the NREL Measurement and Characterization Task effort for ISO 17025 accreditation of NREL Solar Reference Cell Calibrations and have been integrated into the NREL quality system and audited for ISO17025 compliance.

  2. Task and instruction scheduling in parallel multithreaded processors

    E-Print Network [OSTI]

    Mishra, Amitabh

    1996-01-01T23:59:59.000Z

    . A Conceptual Model II A PARALLEL MULTITHREADING PROCESSOR ARCHI- TECTURE. . A. Hardware Organization B. Simulation Methodology III TASK AND INSTRUCTION SCHEDULING . A. Existing Thread and Instruction Scheduling Policies . 1. Round Robin Thread... Decomposition of a 5 X 5 Submatrix . . 29 10 LUD: Comparison of Round Robin Fetch Policies 33 LUD: Comparison of Critical Path Based Prioritized Fetch Policies . 34 12 LUD: Comparison of Fetch Policies 35 13 LUD: Comparison of Instruction Issuing Policies...

  3. Lifting task design associate: a knowledge-based system

    E-Print Network [OSTI]

    Brooks, Susan Elaine

    1993-01-01T23:59:59.000Z

    sophisticated systems to aid in radar operations (Newquist, 1991). The first successful system is considered to be MYCIN This system was developed in the early 1970's to assist medical professionals in the diagnosis of hepatitis and meningitis (Hochron, 1990...LIFTING TASK DESIGN ASSOCIATE: A KNOWLEDGE-BASED SYSTEM A Thesis by Susan Elaine Brooks Submitted to the Oflice of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE...

  4. Use of partner agents in training systems for complex tasks

    E-Print Network [OSTI]

    Sims, Joseph Michael

    2002-01-01T23:59:59.000Z

    Fortress. Space Fortress Controllers. 17 20 Test Game Instruction. 23 MEC Velocity Instruction. 24 Top-Level State Machine Diagram. Flight State Machine Diagram. Fortress State Machine Diagram. 32 32 Mine State Machine Diagram Bonus State..., performance may suffer in situations that are not entirely covered by the part-task training, or where many attention shifts are required. [8, 9, 6]. Multiple Emphasis on Components (MEC) is partially an attempt to counter the isolation found in part...

  5. Task technical plan: DWPF air permit/dispersion modeling

    SciTech Connect (OSTI)

    Lambert, D.P.

    1993-11-08T23:59:59.000Z

    This Task Technical Plan summarizes work required to project the benzene emissions from the Late Wash Facility (LWF) as well as update the benzene, mercury, and NO{sub x} emissions from the remainder of the Defense Waste Processing Facility (DWPF). These calculations will reflect (1) the addition of the LWF and (2) the replacement of formic acid with nitric acid in the melter preparation process. The completed calculations will be used to assist DWPF in applying for the LWF Air Quality Permit.

  6. Upgrading of raw oil into advanced fuel. Task 5

    SciTech Connect (OSTI)

    Not Available

    1991-10-01T23:59:59.000Z

    The overall objective of the research effort is the determination of the minimum processing requirements to produce high energy density fuels (HEDF) having acceptable fuel specifications. The program encompasses assessing current technology capability; selecting acceptable processing and refining schemes; and generating samples of advanced test fuels. The Phase I Baseline Program is intended to explore the processing alternatives for producing advanced HEDF from two raw synfuel feedstocks, one from Mild Coal Gasification as exemplified by the COALITE process and one from Colorado shale oil. Eight key tasks have been identified as follows: (1) Planning and Environmental Permitting; (2) Transporting and Storage of Raw Fuel Sources and Products; (3) Screening of Processing and Upgrading Schemes; (4) Proposed Upgrading Schemes for Advanced Fuel; (5) Upgrading of Raw Oil into Advanced Fuel (6) Packaging and Shipment of Advanced Fuels; (7) Updated Technical and Economic Assessment; and, (8) Final Report of Phase I Efforts. This topical report summarizes the operations and results of the Phase I Task 5 sample preparation program. The specific objectives of Task 5 were to: Perform laboratory characterization tests on the raw COALITE feed, the intermediate liquids to the required hydroprocessing units and final advanced fuels and byproducts; and produce a minimum of 25-gal of Category I test fuel for evaluation by DOE and its contractors.

  7. Sandia-Power Surety Task Force Hawaii foam analysis.

    SciTech Connect (OSTI)

    McIntyre, Annie

    2010-11-01T23:59:59.000Z

    The Office of Secretary of Defense (OSD) Power Surety Task Force was officially created in early 2008, after nearly two years of work in demand reduction and renewable energy technologies to support the Warfighter in Theater. The OSD Power Surety Task Force is tasked with identifying efficient energy solutions that support mission requirements. Spray foam insulation demonstrations were recently expanded beyond field structures to include military housing at Ft. Belvoir. Initial results to using the foam in both applications are favorable. This project will address the remaining key questions: (1) Can this technology help to reduce utility costs for the Installation Commander? (2) Is the foam cost effective? (3) What application differences in housing affect those key metrics? The critical need for energy solutions in Hawaii and the existing relationships among Sandia, the Department of Defense (DOD), the Department of Energy (DOE), and Forest City, make this location a logical choice for a foam demonstration. This project includes application and analysis of foam to a residential duplex at the Waikulu military community on Oahu, Hawaii, as well as reference to spray foam applied to a PACOM facility and additional foamed units on Maui, conducted during this project phase. This report concludes the analysis and describes the utilization of foam insulation at military housing in Hawaii and the subsequent data gathering and analysis.

  8. Task team approach to safeguards and security designs

    SciTech Connect (OSTI)

    Zack, N.R. (Los Alamos National Lab., NM (United States)); Wilkey, D.D. (USDOE Idaho Operations Office, Idaho Falls, ID (United States))

    1991-01-01T23:59:59.000Z

    In 1987, a US Department of Energy (DOE) supported task team was organized at the request of the DOE Idaho Field Office (DOE-ID) to provide support for safeguards and security (S S) designs of the Special Isotope Separation (SIS) facility. Prior to deferral of the project, the SIS facility was to be constructed at the Idaho National Engineering Laboratory (INEL) to produce weapons grade plutonium from DOE owned fuel grade plutonium. The task team was assembled to provide the resources necessary to assure that safeguards and security considerations were included as an integral part of the design of the facility, and that SIS designs would take advantage of available technology in the areas of physical security, measurements, accountability, and material and personnel tracking. The task team included personnel from DOE/Office of Safeguards and Security (DOE-OSS), DOE-ID, DOE contractors, and the national laboratories providing a wide range of expertise and experience. The team reviewed proposed designs and provided recommendations for safeguards and security features in each stage of the design process. The value of this approach to safeguards and security designs will be discussed with respect to benefits, lessons learned, and recommendations for future applications. 5 refs.

  9. OLED lighting devices having multi element light extraction and luminescence conversion layer

    DOE Patents [OSTI]

    Krummacher, Benjamin Claus (Regensburg, DE); Antoniadis, Homer (Mountain View, CA)

    2010-11-16T23:59:59.000Z

    An apparatus such as a light source has a multi element light extraction and luminescence conversion layer disposed over a transparent layer of the light source and on the exterior of said light source. The multi-element light extraction and luminescence conversion layer includes a plurality of light extraction elements and a plurality of luminescence conversion elements. The light extraction elements diffuses the light from the light source while luminescence conversion elements absorbs a first spectrum of light from said light source and emits a second spectrum of light.

  10. Device structure for OLED light device having multi element light extraction and luminescence conversion layer

    DOE Patents [OSTI]

    Antoniadis; Homer (Mountain View, CA), Krummacher; Benjamin Claus (Regensburg, DE)

    2008-01-22T23:59:59.000Z

    An apparatus such as a light source has a multi-element light extraction and luminescence conversion layer disposed over a transparent layer of the light source and on the exterior of said light source. The multi-element light extraction and luminescence conversion layer includes a plurality of light extraction elements and a plurality of luminescence conversion elements. The light extraction elements diffuses the light from the light source while luminescence conversion elements absorbs a first spectrum of light from said light source and emits a second spectrum of light.

  11. JV Task 6 - Coal Ash Resources Research Consortium Research

    SciTech Connect (OSTI)

    Debra Pflughoeft-Hassett; Tera Buckley; Bruce Dockter; Kurt Eylands; David Hassett; Loreal Heebink; Erick Zacher

    2008-04-01T23:59:59.000Z

    The Coal Ash Resources Research Consortium{reg_sign} (CARRC{reg_sign}, pronounced 'cars') focuses on performing fundamental and applied scientific and engineering research emphasizing the environmentally safe, economical use of coal combustion by-products (CCBs). CARRC member organizations, which include utilities and marketers, are key to developing industry-driven research in the area of CCB utilization and ensuring its successful application. The U.S. Department of Energy is a partner in CARRC through the EERC Jointly Sponsored Research Program (JSRP), which provides matching funds for industrial member contributions and facilitates an increased level of effort in CARRC. CARRC tasks were designed to provide information on CCB performance, including environmental performance, engineering performance, favorable economics, and improved life cycle of products and projects. CARRC technical research tasks are developed based on member input and prioritization. CARRC special projects are developed with members and nonmembers to provide similar information and to support activities, including the assembly and interpretation of data, support for standards development and technology transfer, and facilitating product development and testing. CARRC activities from 1998 to 2007 included a range of research tasks, with primary work performed in laboratory tasks developed to answer specific questions or evaluate important fundamental properties of CCBs. CARRC topical reports were prepared on several completed tasks. Specific CARRC 1998B2007 accomplishments included: (1) Development of several ASTM International Standard Guides for CCB utilization applications. (2) Organization and presentation of training courses for CCB professionals and teachers. (3) Development of online resources including the Coal Ash Resource Center, Ash from Biomass in Coal (ABC) of cocombustion ash characteristics, and the Buyer's Guide to Coal-Ash Containing Products. In addition, development of expanded information on the environmental performance of CCBs in utilization settings included the following: (1) Development of information on physical properties and engineering performance for concrete, soil-ash blends, and other products. (2) Training of students through participation in CARRC research projects. (3) Participation in a variety of local, national, and international technical meetings, symposia, and conferences by presenting and publishing CCB-related papers.

  12. Induction Lighting: An Old Lighting Technology Made New Again...

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

    25 years if operated 10 hours a day. The technology, however, is far from new. Nikola Tesla demonstrated induction lighting in the late 1890s around the same time that his rival,...

  13. Using QECBs for Street Lighting Upgrades: Lighting the Way to...

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

    Summarizes how the City of San Diego leveraged 13.1 million in qualified energy conservation bonds to increase the size of a street lighting upgrade project. Author: Lawrence...

  14. Quasi light fields: Extending the light field to coherent radiation

    E-Print Network [OSTI]

    Accardi, Anthony J.

    Imaging technologies such as dynamic viewpoint generation are engineered for incoherent radiation using the traditional light field, and for coherent radiation using electromagnetic field theory. We present a model of ...

  15. 46th Street Pilot Street Lighting Project

    E-Print Network [OSTI]

    Minnesota, University of

    Street to 48th Street) as standard high-pressure sodium (HPS) lighting comparison corridor #12;The over time #12;Initial Lighting Comparison #12;Lighting Project Location #12;Street Light Layout 3046th Street Pilot Street Lighting Project A Joint Venture: Hennepin County & City of Minneapolis

  16. Projection screen having reduced ambient light scattering

    DOE Patents [OSTI]

    Sweatt, William C. (Albuquerque, NM)

    2010-05-11T23:59:59.000Z

    An apparatus and method for improving the contrast between incident projected light and ambient light reflected from a projection screen are described. The efficiency of the projection screen for reflection of the projected light remains high, while permitting the projection screen to be utilized in a brightly lighted room. Light power requirements from the projection system utilized may be reduced.

  17. Identifying Lights with their Switches Jayadev Misra

    E-Print Network [OSTI]

    Misra, Jayadev

    Identifying Lights with their Switches Jayadev Misra 09/07/2012 Problem Description Given are N switches and N lights where each switch controls exactly one light and each light is controlled by exactly of selecting some number of switches and turning them on, and, presumably, noting the lights that come

  18. Inorganic volumetric light source excited by ultraviolet light

    DOE Patents [OSTI]

    Reed, S.; Walko, R.J.; Ashley, C.S.; Brinker, C.J.

    1994-04-26T23:59:59.000Z

    The invention relates to a composition for the volumetric generation of radiation. The composition comprises a porous substrate loaded with a component capable of emitting radiation upon interaction with an exciting radiation. Preferably, the composition is an aerogel substrate loaded with a component, e.g., a phosphor, capable of interacting with exciting radiation of a first energy, e.g., ultraviolet light, to produce radiation of a second energy, e.g., visible light. 4 figures.

  19. Saturable absorption and 'slow light'

    E-Print Network [OSTI]

    Adrian C Selden

    2006-03-25T23:59:59.000Z

    Quantitative evaluation of some recent 'slow light' experiments based on coherent population oscillations (CPO) shows that they can be more simply interpreted as saturable absorption phenomena. Therefore they do not provide an unambiguous demonstration of 'slow light'. Indeed a limiting condition on the spectral bandwidth is not generally satisfied, such that the requirements for burning a narrow spectral hole in the homogeneously broadened absorption line are not met. Some definitive tests of 'slow light' phenomena are suggested, derived from analysis of phase shift and pulse delay for a saturable absorber

  20. COCATS 4 task force 7: Training in cardiovascular computed tomographic imaging

    E-Print Network [OSTI]

    2015-01-01T23:59:59.000Z

    COCATS 4 Task Force 7:Training in Cardiovascular ComputedCOCATS 4 Task Force 7:Training in Cardiovascular ComputedA fellow with Level II training should demonstrate a clear

  1. WP2 IEA Wind Task 26:The Past and Future Cost of Wind Energy

    E-Print Network [OSTI]

    Lantz, Eric

    2014-01-01T23:59:59.000Z

    Presentation submitted to IEA Task 26. Wiser, R. ; Yang,AEE) contribution to IEA Task 26. Chupka, M.W. ; Basheda,International Energy Agency (IEA). (2008). Energy Technology

  2. Can Children Notice Ambiguity in a Referential Communication Task: Differences Between Monolingual and Bilingual Children 

    E-Print Network [OSTI]

    Catto, Kerry

    2014-07-01T23:59:59.000Z

    Previous work shows that children are able to perform referential communication tasks successfully but those under 7 years old tend to perform poorer (Bishop & Adams, 1991). On the other hand, adults are very good at referential tasks and especially...

  3. Engineering task plan for rotary mode core sample truck calibration procedure support engineering

    SciTech Connect (OSTI)

    BOGER, R.M.

    1999-06-04T23:59:59.000Z

    This Engineering Task Plan defines the tasks associated with providing an overview, with respect to the Authorization Basis and PHMC procedures, as applicable, of the calibration documentation for operational equipment for which Characterization Engineering has calibration responsibility.

  4. Blackout 2003: U.S. - Canada Task Force Presents Final Report...

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

    U.S. - Canada Task Force Presents Final Report onBlackout of August 2003 Blackout 2003: U.S. - Canada Task Force Presents Final Report onBlackout of August 2003 August 14, 2003,...

  5. Supernumerary Robotic Limbs : task planning, execution, and prediction-based coordination with the human wearer

    E-Print Network [OSTI]

    Llorens-Bonilla, Baldin Adolfo

    2013-01-01T23:59:59.000Z

    Full automation of repetitive and/or specialized tasks has become a preferred means to meet the needs of manufacturing industries. However, some tasks cannot be fully automated due to their complexity or the nature of the ...

  6. Engineering Task Plan for Water Supply for Spray Washers on the Support Trucks

    SciTech Connect (OSTI)

    BOGER, R.M.

    2000-02-03T23:59:59.000Z

    This Engineering Task Plan (ETP) defines the task and deliverables associated with the design, fabrication and testing of an improved spray wash system for the Rotary Mode Core Sampling (RMCS) System Support Trucks.

  7. An Exploration of Age Effects on a Memory plus Visuomotor Dual Task Paradigm 

    E-Print Network [OSTI]

    Gemmell, Alison

    2010-11-24T23:59:59.000Z

    suitability for clinical use, 24 healthy elderly and 25 healthy young participants were assessed on two conditions using the dual task apparatus and several tests of executive function and memory. In contrast to previous dual task studies, a significant...

  8. Human-automation task allocation in lunar landing: simulation and experiments

    E-Print Network [OSTI]

    Wen, Hui Ying

    2011-01-01T23:59:59.000Z

    Task allocation, or how tasks are assigned to the human operator(s) versus to automation, is an important aspect of designing a complex vehicle or system for use in human space exploration. The performance implications of ...

  9. The effects of aging and dual task performance on language production

    E-Print Network [OSTI]

    Kemper, Susan; Schmalzried, RaLynn Cheri; Herman, Ruth; Leedahl, Skye N.; Mohankumar, Deepthi

    2009-05-01T23:59:59.000Z

    A digital pursuit rotor task was used to measure dual task costs of language production by young and older adults. After training on the pursuit rotor, participants were asked to track the moving target while providing a ...

  10. Simulating the operation of photosensor-based lighting controls

    SciTech Connect (OSTI)

    Ehrlich, Charles; Papamichael, Konstantinos; Lai, Judy; Revzan, Kenneth

    2001-02-15T23:59:59.000Z

    Energy savings from the use of daylighting in commercial buildings are realized through implementation of photoelectric lighting controls that dim electric lights when sufficient daylight is available to provide adequate workplane illumination. The dimming level of electric lighting is based on the signal of a photosensor. Current simulation approaches for such systems are based on the questionable assumption that the signal of the photosensor is proportional to the task illuminance. This paper presents a method that simulates the performance of photosensor controls considering the acceptance angle, angular sensitivity, placement of the photosensor within a space, and color correction filter. The method is based on the multiplication of two fisheye images: one generated from the angular sensitivity of the photosensor and the other from a 180- or 360-degree fisheye image of the space as ''seen'' by the photosensor. The paper includes a detailed description of the method and its implementation, example applications, and validation results based on comparison with measurements in an actual office space.

  11. Next Generation Light Source Workshops

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

    Next Generation Light Source Workshops A series of workshops will be held in late August with the goal of refining the scientific drivers for the facility and translating the...

  12. Columbia Water & Light- Solar Rebates

    Broader source: Energy.gov [DOE]

    Columbia Water & Light electric customers are eligible for a $400 rebate for the purchase of a new solar water heater. To apply for this rebate, a customer submits a pre-approval application to...

  13. Arnold Schwarzenegger LIGHTING RESEARCH PROGRAM

    E-Print Network [OSTI]

    ; James Bryan, Arden Realty; Peter Ngai, Peerless; David Malman, Architectural Lighting Design; Ron Lewis) ; Terry McGowan, ALA; Adriana Valencia (CPUC alternate). Program Advisory Committee: Ron Lewis; Holly Larsen, Larsen Communications. Please cite this repor

  14. Arnold Schwarzenegger LIGHTING RESEARCH PROGRAM

    E-Print Network [OSTI]

    Design Group; Bill Daiber, WFD Associates. Program Advisory Committee: Ron Lewis, Department of Energy Buchan, Sacramento Municipal Utility District. Editorial assistance: Holly Larsen, Larsen Communications Lighting Technology Center; Holly Larsen, Larsen Communications. Please cite

  15. Arnold Schwarzenegger LIGHTING RESEARCH PROGRAM

    E-Print Network [OSTI]

    the contribution of the below individuals: Program Advisory Committee: Ron Lewis, Department of Energy; Jerry Mills Lighting Technology Center; Holly Larsen, Larsen Communications. Please cite this report as follows

  16. Light Duty Vehicle CNG Tanks

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

    Light Duty Vehicle CNG Tanks Dane A. Boysen, PhD Program Director Advanced Research Projects Agency-Energy, US DOE dane.boysen@doe.gov Fiber Reinforced Polymer Composite...

  17. The Advantage of Highly Controlled Lighting for Offices and Commercial Buildings

    SciTech Connect (OSTI)

    Rubinstein, Francis; Bolotov, Dmitriy; Levi, Mark; Powell, Kevin; Schwartz, Peter

    2008-08-17T23:59:59.000Z

    The paper presents results from pilot studies of new 'workstation-specific' luminaires that are designed to provide highly, efficient, customized lighting for open-office cubicles. Workstation specific luminaires have the following characteristics: (1) they provide separate, dimming control of the cubicle's 'ambient' and 'task' lighting components, (2) occupancy sensors and control photosensors are integrated into the fixture's design and operation, (3) luminaires can be networked using physical cabling, microcontrollers and a PC running control software. The energy savings, demand response capabilities and quality of light from the two WS luminaires were evaluated and compared to the performance of a static, low-ambient lighting system that is uncontrolled. Initial results from weeks of operation provide strong indication that WS luminaires can largely eliminate the unnecessary lighting of unoccupied cubicles while providing IESNA-required light levels when the cubicles are occupied. Because each cubicle's lighting is under occupant sensor control, the WS luminaires can capitalize on the fact cubicles are often unoccupied during normal working hours and reduce their energy use accordingly.

  18. Novel phosphors for solid state lighting

    E-Print Network [OSTI]

    Furman, Joshua D

    2010-11-16T23:59:59.000Z

    Solid state white light emitting diode lighting devices outperform conventional light sources in terms of lifetime, durability, and lumens per watt. However, the capital contribution is still to high to encourage widespread adoption. Furthermore...

  19. Toward ZnO Light Emitting Diode

    E-Print Network [OSTI]

    Liu, Jianlin

    2008-01-01T23:59:59.000Z

    applications such as light emitting diodes (LEDs) and laser009 "Toward ZnO Light Emitting Diode" Jianlin Liu July 2008Title: “Toward ZnO Light Emitting Diode” Sponsor: UC Energy

  20. CAMPUS INFRASTRUCTURE & SERVICES CIS-Standard-Lighting

    E-Print Network [OSTI]

    Viglas, Anastasios

    ...........................................................................................................5 5.6 Light fittings and lux performance requirements for various University space types.....5 5...........................................................................12 5.8 EXTERIOR LIGHTING.......................................................................................................12 5.8.2 Exterior Light Poles, Fixings and Wiring

  1. EECBG Success Story: Lighting Retrofit Improving Visibility,...

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

    New LED lighting fixtures (right) emit a whiter light than existing high-pressure sodium cobra head streetlights (left) and don't spill light onto nearby houses. | Photos courtesy...

  2. Embodied Energy and Off-Grid Lighting

    E-Print Network [OSTI]

    Alstone, Peter

    2012-01-01T23:59:59.000Z

    Self-reported Impacts of LED Lighting Technology Comparedto Fuel-based Lighting on Night Market Business Prosperity28, no. 4, pp. 533-546. Lighting Africa (prepared by Dalberg

  3. LIGHT SCATTERING STUDIES OF SILICA AEROGELS

    E-Print Network [OSTI]

    Hunt, A.J.

    2010-01-01T23:59:59.000Z

    van de Hulst, H.C. , Light Scattering by Small Particles,A New Polarization-Modulated Light Scattering Instrument,"and interpretation of light scattering effects in aerogels.

  4. Advanced Light Source Activity Report 2005

    E-Print Network [OSTI]

    Tamura Ed., Lori S.

    2010-01-01T23:59:59.000Z

    upgrade on the Advanced Light Source," Nucl. Instrum. Meth.n photoemission at the Advanced Light Source," Radiât. Phys.high-pressure studies at the Advanced Light Source w i t h a

  5. Beyond the Replacement Paradigm: Smart Lighting

    E-Print Network [OSTI]

    Salama, Khaled

    Switches · Smart Building & Grid Interfaces · Efficient full spectrum LEDs without droop · Versatile, low - Visible Light Communications Integration of smart fixtures, networked sensors and control systemsBeyond the Replacement Paradigm: Smart Lighting Robert F. Karlicek, Jr. Director, Smart Lighting

  6. Lumental : web-based tunable lighting control

    E-Print Network [OSTI]

    Hall, Harrison King

    2012-01-01T23:59:59.000Z

    Dynamically adjusting the light spectrum of spectrum-tunable light fixtures promises significant energy savings over binary or incremental dimming control. To enable this level of controllability, lighting must evolve from ...

  7. A Cognitively Bounded Rational Analysis Model of Dual-Task Performance Trade-Offs

    E-Print Network [OSTI]

    Saunders, Mark

    A Cognitively Bounded Rational Analysis Model of Dual-Task Performance Trade-Offs Christian P of interleaving two tasks can be described as making trade-offs between performance on each of the tasks. This can. An objective payoff function was used to describe how participants should trade-off performance between

  8. TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING 1 Automated Guiding Task of a Flexible Micropart

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING 1 Automated Guiding Task of a Flexible Micropart Lutz, Member, IEEE Abstract--This paper studies automated tasks based on hybrid force/position control of automated guiding task are presented. Note to Practitioners -- This article's motivation is the need of very

  9. Know-Center at TREC 2009 Blog Distillation Task: A Notebook Paper

    E-Print Network [OSTI]

    Hammerton, James

    Know-Center at TREC 2009 Blog Distillation Task: A Notebook Paper Elisabeth Lex, Michael Granitzer,mgrani,ajuffinger}@know-center.at Abstract. This paper outlines our experiments carried out at TREC 2009 Blog Distillation Task. Our system, specifically the blog distillation task, exactly this problem is addressed. The goal of the track is to rank

  10. International Energy Agency (IEA) PVPS Task 12: Environment, Health and Safety

    E-Print Network [OSTI]

    Name #12;Task 12 OrganisationTask 12 Organisation Sub-task 1: Recycling of manufacturing waste and spentFthenakis EPIABelgiumEleniDespotou Utrecht UniversityThe NetherlandsErikAlsema Company/ Organization CountryFirst Name. Crystal Clear project ­ Sustainability and recycling (2004-2008); · crystalline silicon technology

  11. A Task Taxonomy of Network Evolution Analysis Jae-wook Ahn, Catherine Plaisant, and Ben Shneiderman

    E-Print Network [OSTI]

    Golbeck, Jennifer

    A Task Taxonomy of Network Evolution Analysis Jae-wook Ahn, Catherine Plaisant, and Ben Shneiderman provides a taxonomy of the temporal network visualization tasks. We identify (1) the entities, (2 existing temporal network visualization systems. By building and examining the task taxonomy, we report

  12. Chapter 13 Employee Health and Safety 13.05 Abnormally Hazardous Tasks

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Chapter 13 Employee Health and Safety 13.05 Abnormally Hazardous Tasks · Form The Abnormally Hazardous Task Report Form http://oser.state.wi.us/docview.asp?docid=1116 is available to an employee who the "Abnormally Hazardous Task Report" shall review the situation with the employee and attempt to resolve

  13. Using a Randomized Path Planner to Generate 3D Task Demonstrations of Robot Operations

    E-Print Network [OSTI]

    Kabanza, Froduald

    Using a Randomized Path Planner to Generate 3D Task Demonstrations of Robot Operations Khaled for generating 3D tasks demonstrations involving a teleoperated robot arm on the International Space Station (ISS 3D animations that show how to perform a given task with the SSRMS. The current ATDG prototype

  14. TOP-C: Task-Oriented Parallel C for Distributed and Shared Memory

    E-Print Network [OSTI]

    Cooperman, Gene

    TOP-C: Task-Oriented Parallel C for Distributed and Shared Memory Gene Cooperman parallel hardware. TOP-C (Task-Orien* *ted Parallel C) attempts such a model by presenting a task the TOP-C model and then presents ongoing research on combining the advantages of both models in a single

  15. An Evaluation of Graphical Context When the Graphics are Outside of the Task Area

    E-Print Network [OSTI]

    An Evaluation of Graphical Context When the Graphics are Outside of the Task Area Cindy M of an augmentation. This paper describes the results of an experiment to evaluate the effects of graphical context in a Lego block placement task when the graphics are located outside of the task area. Four conditions were

  16. Labor Dynamics in a Mobile Micro-Task Market Mohamed Musthag, Deepak Ganesan

    E-Print Network [OSTI]

    Ganesan, Deepak

    , and time of use, as well as simi- larities in super agent behavior. We conclude with a discus- sion of how than other agents to chain tasks and they pick fewer lower priced tasks than other agents. We compare 2013 ACM 978-1-4503-1899-0/13/04...$15.00. Platform Tasks Field Agent [2] Price checks, Service Assess

  17. Scheduling tree-shaped task graphs to minimize memory and makespan

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Scheduling tree-shaped task graphs to minimize memory and makespan Loris Marchal CNRS experimental evaluation using realistic trees. Keywords-scheduling; makespan-memory tradeoff; tree- shaped task.vivien@inria.fr Abstract--This paper investigates the execution of tree- shaped task graphs using multiple processors. Each

  18. An analysis of muscle fatigue due to complex tasks and its relation to the strain index

    E-Print Network [OSTI]

    Stephens, John-Paul

    2009-06-02T23:59:59.000Z

    The Strain Index was originally designed to analyze mono-task jobs. An experiment using a grip dynamometer was used to simulate six multiple task jobs to study the effect of complex tasks on localized muscle fatigue and to evaluate six different...

  19. Multi-objective Robust Static Mapping of Independent Tasks on Grids

    E-Print Network [OSTI]

    Maciejewski, Anthony A.

    Multi-objective Robust Static Mapping of Independent Tasks on Grids Bernab´e Dorronsoro, Pascal have been proposed in the lit- erature for the problem of mapping tasks on computational Grids (e of a Grid system. Typically, it is assumed that the estimated time to compute each task on every machine

  20. Air exchange effectiveness of conventional and task ventilation for offices

    SciTech Connect (OSTI)

    Fisk, W.J.; Faulkner, D.; Prill, R.J.

    1991-12-01T23:59:59.000Z

    Air quality and comfort complaints within large buildings are often attributed to air distribution problems. We define three air exchange effectiveness parameters related to air distribution. The first two indicate the indoor air flow pattern (i.e., the extent of short circuiting, mixing, or displacement flow) for an entire building or region. The third parameter is most useful for assessments of the spatial variability of ventilation. We also define the air diffusion effectiveness which indicates the air flow pattern within specific rooms or sections of buildings. The results of measurements of these parameters in US office buildings by the authors and other researchers are reviewed. Almost all measurements indicate very limited short circuiting or displacement flow between locations of air supply and removal. However, a moderate degree of short circuiting is evident from a few measurements in rooms with heated supply air. The results of laboratory-based measurements by the authors are consistent with the field data. Our measurements in office buildings do indicate that ventilation rates can vary substantially between indoor locations, probably due to variation in air supply rates between locations rather than variation in the indoor air flow patterns. One possible method of improving air distribution is to employ task ventilation with air supplied closer to the occupant`s breathing zone. We have evaluated two task ventilation systems in a laboratory setting. During most operating conditions, these systems did not provide a region of substantially increased ventilation where occupants breath. However, both systems are capable of providing substantially enhanced ventilation at the breathing zone under some operating conditions. Therefore, task ventilation is a potential option for using ventilation air more effectively.