National Library of Energy BETA

Sample records for maximum achievable control

  1. Boiler Maximum Achievable Control Technology (MACT) Technical...

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

    Boiler Maximum Achievable Control Technology (MACT) Technical Assistance - Fact Sheet, April 2015 Boiler Maximum Achievable Control Technology (MACT) Technical Assistance - Fact...

  2. Boiler MACT 35000FT: Maximum Achievable Control Technology 

    E-Print Network [OSTI]

    Robinson, J.

    2013-01-01

    burning coal, oil, biomass, natural gas, other solid, liquid, gaseous non-waste materials ? Boilers or Process Heaters Not Affected ? Electric Utility Generating Unit (EGU) ?Waste Heat, hot water heaters, NESHAP control devices, R&D, Recovery Boilers...

  3. Maximum Achievable Control Technology for New Industrial Boilers (released in AEO2005)

    Reports and Publications (EIA)

    2005-01-01

    As part of Clean Air Act 90 (CAAA90, the EPA on February 26, 2004, issued a final rulethe National Emission Standards for Hazardous Air Pollutants (NESHAP) to reduce emissions of hazardous air pollutants (HAPs) from industrial, commercial, and institutional boilers and process heaters. The rule requires industrial boilers and process heaters to meet limits on HAP emissions to comply with a Maximum Achievable Control Technology (MACT) floor level of control that is the minimum level such sources must meet to comply with the rule. The major HAPs to be reduced are hydrochloric acid, hydrofluoric acid, arsenic, beryllium, cadmium, and nickel. The EPA predicts that the boiler MACT rule will reduce those HAP emissions from existing sources by about 59,000 tons per year in 2005.

  4. Boiler Maximum Achievable Control Technology (MACT) Technical Assistance -

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers AnnouncementandBlogFact Sheet, April 2015 |

  5. Maximum power tracking control scheme for wind generator systems 

    E-Print Network [OSTI]

    Mena Lopez, Hugo Eduardo

    2009-05-15

    The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

  6. Maximum power tracking control scheme for wind generator systems 

    E-Print Network [OSTI]

    Mena Lopez, Hugo Eduardo

    2008-10-10

    The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

  7. 3798 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 58, NO. 6, JUNE 2012 On the Maximum Achievable Sum-Rate With

    E-Print Network [OSTI]

    Zhao, Yue

    Symposium on Information Theory. Y. Zhao was with the Department of Electrical Engineering, University3798 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 58, NO. 6, JUNE 2012 On the Maximum Achievable of California, Los Angeles (UCLA), Los Angeles, CA 90095 USA. He is now with the Department of Electrical

  8. Centralized Routing Protocol for Wireless Sensor Networks with Ultra Low Duty Cycle to Achieve Maximum Lifetime

    E-Print Network [OSTI]

    Bahk, Saewoong

    Centralized Routing Protocol for Wireless Sensor Networks with Ultra Low Duty Cycle to Achieve performance because most of them are designed without considering a ultra low duty cycled environment to improve a network lifetime and a routing maintenance cost. We explain the issues of a ultra low duty

  9. Estimates of Savings Achievable from Irrigation Controller

    SciTech Connect (OSTI)

    Williams, Alison; Fuchs, Heidi; Whitehead, Camilla Dunham

    2014-03-28

    This paper performs a literature review and meta-analysis of water savings from several types of advanced irrigation controllers: rain sensors (RS), weather-based irrigation controllers (WBIC), and soil moisture sensors (SMS).The purpose of this work is to derive average water savings per controller type, based to the extent possible on all available data. After a preliminary data scrubbing, we utilized a series of analytical filters to develop our best estimate of average savings. We applied filters to remove data that might bias the sample such as data self-reported by manufacturers, data resulting from studies focusing on high-water users, or data presented in a non-comparable format such as based on total household water use instead of outdoor water use. Because the resulting number of studies was too small to be statistically significant when broken down by controller type, this paper represents a survey and synthesis of available data rather than a definitive statement regarding whether the estimated water savings are representative.

  10. Method of achieving the controlled release of thermonuclear energy

    DOE Patents [OSTI]

    Brueckner, Keith A. (Ann Arbor, MI)

    1986-01-01

    A method of achieving the controlled release of thermonuclear energy by illuminating a minute, solid density, hollow shell of a mixture of material such as deuterium and tritium with a high intensity, uniformly converging laser wave to effect an extremely rapid build-up of energy in inwardly traveling shock waves to implode the shell creating thermonuclear conditions causing a reaction of deuterons and tritons and a resultant high energy thermonuclear burn. Utilizing the resulting energy as a thermal source and to breed tritium or plutonium. The invention also contemplates a laser source wherein the flux level is increased with time to reduce the initial shock heating of fuel and provide maximum compression after implosion; and, in addition, computations and an equation are provided to enable the selection of a design having a high degree of stability and a dependable fusion performance by establishing a proper relationship between the laser energy input and the size and character of the selected material for the fusion capsule.

  11. On the Stochastic Maximum Principle in Optimal Control of Degenerate Diffusions with Lipschitz Coefficients

    SciTech Connect (OSTI)

    Bahlali, Khaled Djehiche, Boualem Mezerdi, Brahim

    2007-12-15

    We establish a stochastic maximum principle in optimal control of a general class of degenerate diffusion processes with global Lipschitz coefficients, generalizing the existing results on stochastic control of diffusion processes. We use distributional derivatives of the coefficients and the Bouleau Hirsh flow property, in order to define the adjoint process on an extension of the initial probability space.

  12. Adaptive control of input field to achieve desired output intensity profile in

    E-Print Network [OSTI]

    Kahn, Joseph M.

    Adaptive control of input field to achieve desired output intensity profile in multimode fiber fiber (MMF) with random mode coupling by controlling the input field distribution using a spatial light objective function. We present an adaptive sequential coordinate ascent (SCA) algorithm for controlling

  13. Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office

    SciTech Connect (OSTI)

    Rubinstein, Francis; Enscoe, Abby

    2010-04-19

    An installation in a Federal building tested the effectiveness of a highly-controlled, workstation-specific lighting retrofit. The study took place in an open-office area with 86 cubicles and low levels of daylight. Each cubicle was illuminated by a direct/indirectpendant luminaire with three 32 watt lamps, two dimmable DALI ballasts, and an occupancy sensor. A centralized control system programmed all three lamps to turn on and off according to occupancy on a workstation-by-workstation basis. Field measurements taken over the course of several monthsdemonstrated 40% lighting energy savings compared to a baseline without advanced controls that conforms to GSA's current retrofit standard. A photometric analysis found that the installation provided higher desktop light levels than the baseline, while an occupant survey found that occupants in general preferred the lighting system to thebaseline.Simple payback is fairly high; projects that can achieve lower installation costs and/or higher energy savings and those in which greenhouse gas reduction and occupant satisfaction are significant priorities provide the ideal setting for workstation-specific lighting retrofits.

  14. Effect of downstream feedback on the achievable performance of feedback control loops for serial processes

    E-Print Network [OSTI]

    Duffy, Ken

    -- Optimal control, multivariate control, serial processes, process control. I. INTRODUCTION The term serial-- This paper deals with feedback control of serial processes, that is, processes formed by the series control and feedforward action. The problem is addressed using an H2 optimal performance criterion

  15. Advanced, Integrated Control for Building Operations to Achieve 40% Energy Saving

    SciTech Connect (OSTI)

    Lu, Yan; Song, Zhen; Loftness, Vivian; Ji, Kun; Zheng, Sam; Lasternas, Bertrand; Marion, Flore; Yuebin, Yu

    2012-10-15

    We developed and demonstrated a software based integrated advanced building control platform called Smart Energy Box (SEB), which can coordinate building subsystem controls, integrate variety of energy optimization algorithms and provide proactive and collaborative energy management and control for building operations using weather and occupancy information. The integrated control system is a low cost solution and also features: Scalable component based architecture allows to build a solution for different building control system configurations with needed components; Open Architecture with a central data repository for data exchange among runtime components; Extendible to accommodate variety of communication protocols. Optimal building control for central loads, distributed loads and onsite energy resource; uses web server as a loosely coupled way to engage both building operators and building occupants in collaboration for energy conservation. Based on the open platform of SEB, we have investigated and evaluated a variety of operation and energy saving control strategies on Carnegie Mellon University Intelligent Work place which is equipped with alternative cooling/heating/ventilation/lighting methods, including radiant mullions, radiant cooling/heating ceiling panels, cool waves, dedicated ventilation unit, motorized window and blinds, and external louvers. Based on the validation results of these control strategies, they were integrated in SEB in a collaborative and dynamic way. This advanced control system was programmed and computer tested with a model of the Intelligent Workplace's northern section (IWn). The advanced control program was then installed in the IWn control system; the performance was measured and compared with that of the state of the art control system to verify the overall energy savings great than 40%. In addition advanced human machine interfaces (HMI's) were developed to communicate both with building occupants and the building operator. Lifecycle cost analyses of the advanced building control were performed, and a Building Control System Guide was prepared and published to inform owners, architects, and engineers dealing with new construction or renovation of buildings.

  16. Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office

    E-Print Network [OSTI]

    Rubinstein, Francis

    2010-01-01

    If you could change the lighting in your office, what wouldapply. Highly-Controlled Lighting 50 of 50 April 19, 2010Europa 2009, 11th European Lighting Conference, Istanbul,

  17. CCLEP Retrofit and Innovative Controls to Achieve 56% Energy Savings for a Luxury Shopping Mall 

    E-Print Network [OSTI]

    Wu, L.; Pang, X.; Liu, M.; Wang, J.; Lewis, T. G.

    2007-01-01

    dampers, replacing the boiler, installing VFD on fans and pumps, and installing a Fan Airflow Station (FAS) and Pump Waterflow Station (PWS). This paper presents both the existing and the optimal control schedules, which include static pressure reset...

  18. ELM Control at the L-H Transition Achieved by Pellet Pacing in the All-metal Wall Tokamaks ASDEX Upgrade and JET

    E-Print Network [OSTI]

    ELM Control at the L-H Transition Achieved by Pellet Pacing in the All-metal Wall Tokamaks ASDEX Upgrade and JET

  19. Identification of Energy Efficiency Opportunities through Building Data Analysis and Achieving Energy Savings through Improved Controls

    SciTech Connect (OSTI)

    Katipamula, Srinivas; Taasevigen, Danny J.; Koran, Bill

    2014-09-04

    This chapter will highlight analysis techniques to identify energy efficiency opportunities to improve operations and controls. A free tool, Energy Charting and Metrics (ECAM), will be used to assist in the analysis of whole-building, sub-metered, and/or data from the building automation system (BAS). Appendix A describes the features of ECAM in more depth, and also provide instructions for downloading ECAM and all resources pertaining to using ECAM.

  20. Exploring Maximum Humidity Control and Energy Conservation Opportunities with Single Duct Single Zone Air-Handling Units 

    E-Print Network [OSTI]

    Zhou, J.; Wei, G.; Turner, W. D.; Deng, S.; Claridge, D.

    2006-01-01

    the outside air. However, it also involves major ductwork changes. 2.3 Variable speed control of supply airflow A variable speed drive (VFD) saves fan power by slowing down the fan speed and delivering less supply air to the conditioned space during... by adjusting the supply fan speed. However, if the space cooling load drops below the point where the supply airflow reaches the minimum flow required for proper ventilation, the supply air temperature has to be raised to keep the space temperature from...

  1. Predictive Control with Parameter Adaptation to Achieve ?-Protection in the RECONFIGURE Benchmark in the Presence of Icing

    E-Print Network [OSTI]

    Hartley, E. N.

    2050-01-01

    and reconfigurable flight control. In Proc. IEEE Int. Symp. Intelligent Control, 222–227. Taipei, Taiwan. Keviczky, T. and Balas, G.J. (2006). Software-enabled receding horizon control for autonomous unmanned aerial vehicle guidance. J. Guidance, Control...

  2. Abstract--A scalable multi-agent paradigm is presented for control of distributed energy resources to achieve higher

    E-Print Network [OSTI]

    Tolbert, Leon M.

    1 Abstract-- A scalable multi-agent paradigm is presented for control of distributed energy these new distributed energy resources (DER) and providing new ancillary services that can improve or to reduce system operation costs. Power electronics have not only made grid connection of distributed energy

  3. Maximum-principle-satisfying second order discontinuous Galerkin ...

    E-Print Network [OSTI]

    2014-05-05

    Notice that the CFL conditions in Table 2.1 are sufficient but not necessary to achieve maximum principle. A more efficient implementation would be enforcing

  4. EERE Takes Important Steps to Ensure Maximum Impact of Technology...

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

    in wind, solar and other programs is essential to achieve maximum return for taxpayer investment. | Photos courtesy of the National Renewable Energy Laboratory Tracking...

  5. Achieving dust lead clearance standards after lead hazard control projects: An evaluation of the HUD-recommended cleaning procedure and an abbreviated alternative

    SciTech Connect (OSTI)

    Dixon, S. ); Tohn, E. ); Rupp, R. ); Clark, S. . Dept. of Environmental Health)

    1999-05-01

    The US Department of Housing and Urban Development's (HUD's) Guidelines for the Evaluation and Control of Lead-Based Paint Hazards in Housing strongly recommend that after lead hazard control interventions all walls, ceiling, floors, and other horizontal surfaces be cleaned using a three-step process to reduce lead-contaminated dust and debris. The three steps are: an initial vacuuming using a machine equipped with a high-efficiency particulate air (HEPA) filter (HEPA vacuum), wet wash with a lead cleaner, and a final HEPA vacuum. This study evaluated the effectiveness of two cleaning protocols: (1) the HUD-recommended three-step procedure, and (2) an abbreviated two-step cleaning procedure that omits the final HEPA vacuum. Cleaning procedures were evaluated in 27 dwelling units that had undergone significant lead hazard control interventions likely to produce lead dust. Dust lead samples were collected on floors and in window sills and troughs prior to the lead control hazard intervention, after the wet wash step of the cleaning procedure, and after completion of the second HEPA vacuuming. The results of the study demonstrate that dust lead surface loading on smooth and cleanable surfaces following the three-step and two-step cleaning procedures can achieve 1995 federal guidance dust clearance levels and levels substantially lower. Although the dust lead clearance rates before and after the second HEPA vacuum were the same, the time saved by omitting the second HEPA is small relative to the other elements of the cleaning process.

  6. Maximum-likelihood

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on dark matter By Sarah Schlieder *8MatthewMaximum-likelihood fitting

  7. Roadmap to Achieve Energy Delivery Systems Cybersecurity

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

    to Achieve Energy Delivery Systems Cybersecurity ii Acknowledgements The Energy Sector Control Systems Working Group (ESCSWG) developed this roadmap in support of the Electricity...

  8. Dilute Clean Diesel Combustion Achieves Low Emissions and High...

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

    Dilute Clean Diesel Combustion Achieves Low Emissions and High Efficiency While Avoiding Control Problems of HCCI Dilute Clean Diesel Combustion Achieves Low Emissions and High...

  9. Maximum output at minimum cost

    E-Print Network [OSTI]

    Firestone, Jeremy

    Gamesa G90-2.0 MW #12;Maximum output at minimum cost per kWh for low wind sites ®® Class IIIA mast and the electrical substation. This innovative modular design based on TCP/IP architecture has

  10. Maximum entropy analysis of cosmic ray composition

    E-Print Network [OSTI]

    Nosek, Dalibor; Vícha, Jakub; Trávní?ek, Petr; Nosková, Jana

    2016-01-01

    We focus on the primary composition of cosmic rays with the highest energies that cause extensive air showers in the Earth's atmosphere. A way of examining the two lowest order moments of the sample distribution of the depth of shower maximum is presented. The aim is to show that useful information about the composition of the primary beam can be inferred with limited knowledge we have about processes underlying these observations. In order to describe how the moments of the depth of shower maximum depend on the type of primary particles and their energies, we utilize a superposition model. Using the principle of maximum entropy, we are able to determine what trends in the primary composition are consistent with the input data, while relying on a limited amount of information from shower physics. Some capabilities and limitations of the proposed method are discussed. In order to achieve a realistic description of the primary mass composition, we pay special attention to the choice of the parameters of the sup...

  11. Achievement of Low Emissions by Engine Modification to Utilize Gas-to-Liquid Fuel and Advanced Emission Controls on a Class 8 Truck

    SciTech Connect (OSTI)

    Alleman, T. L.; Tennant, C. J.; Hayes, R. R.; Miyasato, M.; Oshinuga, A.; Barton, G.; Rumminger, M.; Duggal, V.; Nelson, C.; Ray, M.; Cherrillo, R. A.

    2005-11-01

    A 2002 Cummins ISM engine was modified to be optimized for operation on gas-to-liquid (GTL) fuel and advanced emission control devices. The engine modifications included increased exhaust gas recirculation (EGR), decreased compression ratio, and reshaped piston and bowl configuration.

  12. Maximum output at minimum cost

    E-Print Network [OSTI]

    Firestone, Jeremy

    working life of the turbine. Gamesa WindNet® The new generation SCADA System (a wind farm control system

  13. Sr. Achievement Awards - 4 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    the same period, production levels fluctuated between 7.3 and 22.4 million tons in the same region indicating how variable and uncertain maize production can be (Banziger et al., 2000). In the Southern Africa Development Community (SADC) region, over... of experiments ?????????????... 33 3b Summary of trials conducted, altitude, latitude, location, type of management and plot sizes ????????????????????????....... 35 4 Mean, minimum and maximum grain yields per trial for all environments and population...

  14. Achieving Sustainability Cindy Carlsson

    E-Print Network [OSTI]

    Minnesota, University of

    Achieving Sustainability Cindy Carlsson Mn/DOT Office of Policy Analysis, Research and Innovation April 21, 2011 #12;Sustainability Is Not New Mn/DOT has long been a leader in CSS and environmental excellence. . . . . . so we're well along on the path to sustainability! #12;Today Sustainability is More

  15. Achieving Sustainability Cindy Carlsson

    E-Print Network [OSTI]

    Minnesota, University of

    Achieving Sustainability at MnDOT Cindy Carlsson MnDOT Office of Policy Analysis, Research and Innovation 22nd Annual Transportation Research Conference May 24, 2011 #12;Sustainable practices respect Sustainability #12;Environmental Sustainability Sustainable practices · Are compatible with and may enhance

  16. Key Research Results Achievement

    E-Print Network [OSTI]

    ) evaluated several common figures of merit used to compare the electrical and optical performance of TCsKey Research Results Achievement NREL research significantly contributed to inadequate existing not yet at performance levels of TCOs, demonstrate a much better combination of transmission

  17. Objects of maximum electromagnetic chirality

    E-Print Network [OSTI]

    Fernandez-Corbaton, Ivan

    2015-01-01

    We introduce a definition of the electromagnetic chirality of an object and show that it has an upper bound. The upper bound is attained if and only if the object is transparent for fields of one handedness (helicity). Additionally, electromagnetic duality symmetry, i.e. helicity preservation upon scattering, turns out to be a necessary condition for reciprocal scatterers to attain the upper bound. We use these results to provide requirements for the design of such extremal scatterers. The requirements can be formulated as constraints on the polarizability tensors for dipolar scatterers or as material constitutive relations. We also outline two applications for objects of maximum electromagnetic chirality: A twofold resonantly enhanced and background free circular dichroism measurement setup, and angle independent helicity filtering glasses.

  18. Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine 

    E-Print Network [OSTI]

    Kroeger, Timothy H

    2013-09-19

    The brake torque of a direct-injection diesel engine is known to plateau over a range of injection timings. Injection timing affects the engine’s ignition delay and the fractions of fuel which burn in premixed and diffusion modes. Therefore...

  19. Achieving Minimum-Routing-Cost Maximum-Flows in Infrastructure Wireless Mesh Networks

    E-Print Network [OSTI]

    Szymanski, Ted

    of a collection of interconnected wireless mesh routers, represent a promising technology to deliver communication a wireless router and the end-users within a wireless cell is called end-user traffic. The delivery of traffic between the wireless routers in a multihop manner is called backhauling, and this traffic

  20. Maximum entanglement in squeezed boson and fermion states

    SciTech Connect (OSTI)

    Khanna, F. C. [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); TRIUMF, Vancouver, British Columbia V6T 2A3 (Canada); Malbouisson, J. M. C. [Instituto de Fisica, Universidade Federal da Bahia, 40210-340, Salvador, BA (Brazil); Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); Santana, A. E. [Instituto de Fisica, Universidade de Brasilia, 70910-900, Brasilia, DF (Brazil); Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); Santos, E. S. [Centro Federal de Educacao Tecnologica da Bahia, 40030-010, Salvador, BA (Brazil)

    2007-08-15

    A class of squeezed boson and fermion states is studied with particular emphasis on the nature of entanglement. We first investigate the case of bosons, considering two-mode squeezed states. Then we construct the fermion version to show that such states are maximum entangled, for both bosons and fermions. To achieve these results, we demonstrate some relations involving squeezed boson states. The generalization to the case of fermions is made by using Grassmann variables.

  1. The maximum multiflow problems with bounded fractionality

    E-Print Network [OSTI]

    Hirai, Hiroshi

    (Karzanov 98) frac(| ) = frac(K2 + Kn) = 4 (Lomonsov 04) frac( ) =? Hiroshi Hirai The maximum multiflow

  2. The maximum efficiency of nano heat engines depends on more than temperature

    E-Print Network [OSTI]

    Mischa P. Woods; Nelly Ng; Stephanie Wehner

    2015-06-07

    Sadi Carnot's theorem regarding the maximum efficiency of heat engines is considered to be of fundamental importance in the theory of heat engines and thermodynamics. Here, we show that at the nano and quantum scale, this law needs to be revised in the sense that more information about the bath other than its temperature is required to decide whether maximum efficiency can be achieved. In particular, we derive new fundamental limitations of the efficiency of heat engines at the nano and quantum scale that show that the Carnot efficiency can only be achieved under special circumstances, and we derive a new maximum efficiency for others.

  3. Maximum-Likelihood Stereo Correspondence using Field

    E-Print Network [OSTI]

    MacLean, W. James

    Maximum-Likelihood Stereo Correspondence using Field Programmable Gate Arrays Siraj Sabihuddin & W. James MacLean Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario be performed using a maximum- likelihood formulation. One such formulation has been presented by Cox [1], who

  4. MAXIMUM ENTROPY APPROACH TO OPTIMAL SENSOR PLACEMENT

    E-Print Network [OSTI]

    Kreinovich, Vladik

    MAXIMUM ENTROPY APPROACH TO OPTIMAL SENSOR PLACEMENT FOR AEROSPACE NON-DESTRUCTIVE TESTING R discussed for space struc- tures. Key words: Non-destructive testing, maximum entropy, aerospace structures not have a sufficient number of them, so additional sensors must be placed to test the structural integrity

  5. Dynamic Product Assembly and Inventory Control for Maximum Profit

    E-Print Network [OSTI]

    Neely, Michael J

    2010-01-01

    We consider a manufacturing plant that purchases raw materials for product assembly and then sells the final products to customers. There are M types of raw materials and K types of products, and each product uses a certain subset of raw materials for assembly. The plant operates in slotted time, and every slot it makes decisions about re-stocking materials and pricing the existing products in reaction to (possibly time-varying) material costs and consumer demands. We develop a dynamic purchasing and pricing policy that yields time average profit within epsilon of optimality, for any given epsilon>0, with a worst case storage buffer requirement that is O(1/epsilon). The policy can be implemented easily for large M, K, yields fast convergence times, and is robust to non-ergodic system dynamics.

  6. Cell development obeys maximum Fisher information

    E-Print Network [OSTI]

    B. R. Frieden; R. A. Gatenby

    2014-04-29

    Eukaryotic cell development has been optimized by natural selection to obey maximal intracellular flux of messenger proteins. This, in turn, implies maximum Fisher information on angular position about a target nuclear pore complex (NPR). The cell is simply modeled as spherical, with cell membrane (CM) diameter 10 micron and concentric nuclear membrane (NM) diameter 6 micron. The NM contains about 3000 nuclear pore complexes (NPCs). Development requires messenger ligands to travel from the CM-NPC-DNA target binding sites. Ligands acquire negative charge by phosphorylation, passing through the cytoplasm over Newtonian trajectories toward positively charged NPCs (utilizing positive nuclear localization sequences). The CM-NPC channel obeys maximized mean protein flux F and Fisher information I at the NPC, with first-order delta I = 0 and approximate 2nd-order delta I = 0 stability to environmental perturbations. Many of its predictions are confirmed, including the dominance of protein pathways of from 1-4 proteins, a 4nm size for the EGFR protein and the approximate flux value F =10^16 proteins/m2-s. After entering the nucleus, each protein ultimately delivers its ligand information to a DNA target site with maximum probability, i.e. maximum Kullback-Liebler entropy HKL. In a smoothness limit HKL approaches IDNA/2, so that the total CM-NPC-DNA channel obeys maximum Fisher I. Thus maximum information approaches non-equilibrium, one condition for life.

  7. Microcontroller Servomotor for Maximum Effective Power Point for Solar Cell System 

    E-Print Network [OSTI]

    Al-Khalidy, M.; Al-Rawi, O.; Noaman, N.

    2010-01-01

    In this paper a Maximum Power point (MPP) tracking algorithm is developed using dual-axis servomotor feedback tracking control system. An efficient and accurate servomotor system is used to increase the system efficiency ...

  8. Maximum total organic carbon limit for DWPF melter feed

    SciTech Connect (OSTI)

    Choi, A.S.

    1995-03-13

    DWPF recently decided to control the potential flammability of melter off-gas by limiting the total carbon content in the melter feed and maintaining adequate conditions for combustion in the melter plenum. With this new strategy, all the LFL analyzers and associated interlocks and alarms were removed from both the primary and backup melter off-gas systems. Subsequently, D. Iverson of DWPF- T{ampersand}E requested that SRTC determine the maximum allowable total organic carbon (TOC) content in the melter feed which can be implemented as part of the Process Requirements for melter feed preparation (PR-S04). The maximum TOC limit thus determined in this study was about 24,000 ppm on an aqueous slurry basis. At the TOC levels below this, the peak concentration of combustible components in the quenched off-gas will not exceed 60 percent of the LFL during off-gas surges of magnitudes up to three times nominal, provided that the melter plenum temperature and the air purge rate to the BUFC are monitored and controlled above 650 degrees C and 220 lb/hr, respectively. Appropriate interlocks should discontinue the feeding when one or both of these conditions are not met. Both the magnitude and duration of an off-gas surge have a major impact on the maximum TOC limit, since they directly affect the melter plenum temperature and combustion. Although the data obtained during recent DWPF melter startup tests showed that the peak magnitude of a surge can be greater than three times nominal, the observed duration was considerably shorter, on the order of several seconds. The long surge duration assumed in this study has a greater impact on the plenum temperature than the peak magnitude, thus making the maximum TOC estimate conservative. Two models were used to make the necessary calculations to determine the TOC limit.

  9. Bayesian and Maximum Likelihood Neural Networks

    E-Print Network [OSTI]

    Nielsen, Finn Årup

    Bayesian and Maximum Likelihood Neural Networks Finn A ffi rup Nielsen Section for Digital Signal, linear output, Gaussian distribution ] \\Gamma 1;+1[ ffl Binary (binary classification), tanh on output, bino­ mial distribution. ] \\Gamma 1; +1[ ffl Classification, softmax function on outputs [Bridle, 1990

  10. Partitioned algorithms for maximum likelihood and

    E-Print Network [OSTI]

    Smyth, Gordon K.

    Partitioned algorithms for maximum likelihood and other nonlinear estimation Gordon K. Smyth There are a variety of methods in the literature which seek to make iterative estimation algorithms more manageable by breaking the iterations into a greater number of simpler or faster steps. Those algorithms which deal

  11. On maximum matching width Jisu Jeong (KAIST)

    E-Print Network [OSTI]

    Kim, Yong Jung

    ;Graph width parameters · tree-width (Halin 1976, Robertson and Seymour 1984) · branch-width (Robertson and Seymour 1991) · carving-width (Seymour and Thomas 1994) · clique-width (Courcelle and Olariu 2000) · rank-width (Oum and Seymour 2006) · maximum matching-width (Vatshelle 2012) #12;a b c d e fg hi j A tree

  12. NOAA Technical Memorandum NMFS-SEFSC-570 ESTIMATION OF EFFORT, MAXIMUM SUSTAINABLE YIELD, AND MAXIMUM

    E-Print Network [OSTI]

    , AND MAXIMUM ECONOMIC YIELD IN THE SHRIMP FISHERY OF THE GULF OF MEXICO BY JAMES NANCE, WALTER KEITHLY, JR YIELD, AND MAXIMUM ECONOMIC YIELD IN THE SHRIMP FISHERY OF THE GULF OF MEXICO BY JAMES NANCE, WALTER in the shrimp fishery of the Gulf of Mexico. NOAA Technical Memorandum NMFS-SEFSC-570, 71P. Copies may

  13. Second laws under control restrictions

    E-Print Network [OSTI]

    H. Wilming; R. Gallego; J. Eisert

    2015-07-28

    The second law of thermodynamics, formulated as an ultimate bound on the maximum extractable work, has been rigorously derived in multiple scenarios. However, the unavoidable limitations that emerge due to the lack of control on small systems are often disregarded when deriving such bounds, which is specifically important in the context of quantum thermodynamics. Here, we study the maximum extractable work with limited control over the working system and its interaction with the heat bath. We derive a general second law when the set of accessible Hamiltonians of the working-system is arbitrarily restricted. We then apply our bound to particular scenarios that are important in realistic implementations: limitations on the maximum energy gap and local control over many-body systems. We hence demonstrate in what precise way the lack of control affects the second law. In particular, contrary to the unrestricted case, we show that the optimal work extraction is not achieved by simple thermal contacts. Our results do not only generalize the second law to scenarios of practical relevance, but also take first steps in the direction of local thermodynamics.

  14. NERSC Achievement Award Recipient Presentations

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework usesof Energy Moving ForwardAchievement Awards NERSC Achievement

  15. Zipf's law, power laws, and maximum entropy

    E-Print Network [OSTI]

    Visser, Matt

    2012-01-01

    Zipf's law, and power laws in general, have attracted and continue to attract considerable attention in a wide variety of disciplines - from astronomy to demographics to economics to linguistics to zoology, and even warfare. A recent model of random group formation [RGF] attempts a general explanation of such phenomena based on Jaynes' notion of maximum entropy applied to a particular choice of cost function. In the present article I argue that the cost function used in the RGF model is in fact unnecessarily complicated, and that power laws can be obtained in a much simpler way by applying maximum entropy ideas directly to the Shannon entropy subject only to a single constraint: that the average of the logarithm of the observable quantity is specified.

  16. Maximum Estrada Index of Bicyclic Graphs

    E-Print Network [OSTI]

    Wang, Long; Wang, Yi

    2012-01-01

    Let $G$ be a simple graph of order $n$, let $\\lambda_1(G),\\lambda_2(G),...,\\lambda_n(G)$ be the eigenvalues of the adjacency matrix of $G$. The Esrada index of $G$ is defined as $EE(G)=\\sum_{i=1}^{n}e^{\\lambda_i(G)}$. In this paper we determine the unique graph with maximum Estrada index among bicyclic graphs with fixed order.

  17. Maximum-Entropy Inference with a Programmable Annealer

    E-Print Network [OSTI]

    Nicholas Chancellor; Szilard Szoke; Walter Vinci; Gabriel Aeppli; Paul A. Warburton

    2015-06-26

    Optimisation problems in science and engineering typically involve finding the ground state (i.e. the minimum energy configuration) of a cost function with respect to many variables. If the variables are corrupted by noise then this approach maximises the likelihood that the solution found is correct. An alternative approach is to make use of prior statistical information about the noise in conjunction with Bayes's theorem. The maximum entropy solution to the problem then takes the form of a Boltzmann distribution over the ground and excited states of the cost function. Here we use a programmable Josephson junction array for the information decoding problem which we simulate as a random Ising model in a field. We show experimentally that maximum entropy decoding at finite temperature can in certain cases give competitive and even slightly better bit-error-rates than the maximum likelihood approach at zero temperature, confirming that useful information can be extracted from the excited states of the annealing device. Furthermore we introduce a microscopic bit-by-bit analytical method which is agnostic to the specific application and use it to show that the annealing device samples from a highly Boltzmann-like distribution. Machines of this kind are therefore candidates for use in a wide variety of machine learning applications which exploit maximum entropy inference, including natural language processing and image recognition. We further show that the limiting factor for performance in our experiments is likely to be control errors rather than failure to reach equilibrium. Our work also provides a method for determining if a system is in equilibrium which can be easily generalized. We discuss possible applications of this method to spin glasses and probing the performance of the quantum annealing algorithm.

  18. Industrial Scale Demonstration of Smart Manufacturing Achieving...

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

    of Smart Manufacturing Achieving Transformational Energy Productivity Gains Industrial Scale Demonstration of Smart Manufacturing Achieving Transformational Energy...

  19. Oxidation State Optimization for Maximum Efficiency of NOx Adsorber...

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

    State Optimization for Maximum Efficiency of NOx Adsorber Catalysts Oxidation State Optimization for Maximum Efficiency of NOx Adsorber Catalysts Presentation given at the 16th...

  20. Maximum Performance Group MPG | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to: navigation, searchScotland JumpPlantation Elec Co JumpIAEAOpenMaximum

  1. Using Data to Achieve Anticipated Savings

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

    Capabilities Build 9 Using Data to Achieve Anticipated Savings Way Ahead - Navy "SmartGrid" Enabling Capabilities 10 October 13, 2009 Using Data to Achieve Anticipated Savings...

  2. Cleanup Contractor Achieves 'Elite' Nuclear Material Accountability...

    Office of Environmental Management (EM)

    Cleanup Contractor Achieves 'Elite' Nuclear Material Accountability Status Cleanup Contractor Achieves 'Elite' Nuclear Material Accountability Status September 30, 2014 - 12:00pm...

  3. Integrated CMOS Energy Harvesting Converter with Digital Maximum Power Point Tracking for a Portable Thermophotovoltaic Power Generator

    E-Print Network [OSTI]

    Pilawa-Podgurski, Robert

    This paper presents an integrated maximum power point tracking system for use with a thermophotovoltaic (TPV) portable power generator. The design, implemented in 0.35 ?m CMOS technology, consists of a low-power control ...

  4. Statistical optimization for passive scalar transport: maximum entropy production vs maximum Kolmogorov-Sinay entropy

    E-Print Network [OSTI]

    Martin Mihelich; Berengere Dubrulle; Didier Paillard; Davide Faranda

    2015-05-26

    We derive rigorous results on the link between the principle of maximum entropy production and the principle of maximum Kolmogorov-Sinai entropy using a Markov model of the passive scalar diffusion called the Zero Range Process. We show analytically that both the entropy production and the Kolmogorov-Sinai entropy seen as functions of f admit a unique maximum denoted fmaxEP and fmaxKS. The behavior of these two maxima is explored as a function of the system disequilibrium and the system resolution N. The main result of this article is that fmaxEP and fmaxKS have the same Taylor expansion at _rst order in the deviation of equilibrium. We find that fmaxEP hardly depends on N whereas fmaxKS depends strongly on N. In particular, for a fixed difference of potential between the reservoirs, fmaxEP (N) tends towards a non-zero value, while fmaxKS (N) tends to 0 when N goes to infinity. For values of N typical of that adopted by Paltridge and climatologists we show that fmaxEP and fmaxKS coincide even far from equilibrium. Finally, we show that one can find an optimal resolution N_ such that fmaxEP and fmaxKS coincide, at least up to a second order parameter proportional to the non-equilibrium uxes imposed to the boundaries.

  5. Performance of Photovoltaic Maximum Power Point Tracking Algorithms in the Presence of Noise

    E-Print Network [OSTI]

    Odam, Kofi

    Performance of Photovoltaic Maximum Power Point Tracking Algorithms in the Presence of Noise tracking (MPPT) algorithms for photovoltaic systems, including how noise affects both tracking speed-performance photovoltaic sys- tems. An intelligent controller adjusts the voltage, current, or impedance seen by a solar

  6. Sufficient Stochastic Maximum Principle in a Regime-Switching Diffusion Model

    SciTech Connect (OSTI)

    Donnelly, Catherine, E-mail: C.Donnelly@hw.ac.uk [Heriot-Watt University, Department of Actuarial Mathematics and Statistics (United Kingdom)

    2011-10-15

    We prove a sufficient stochastic maximum principle for the optimal control of a regime-switching diffusion model. We show the connection to dynamic programming and we apply the result to a quadratic loss minimization problem, which can be used to solve a mean-variance portfolio selection problem.

  7. Achieving broad access to satellite control research with zero robotics

    E-Print Network [OSTI]

    Katz, Jacob G

    2013-01-01

    Since operations began in 2006, the SPHERES facility, including three satellites aboard the International Space Station (ISS), has demonstrated many future satellite technologies in a true microgravity environment and ...

  8. Achieving Better Building Performance and Savings Using Optimal Control Strategies 

    E-Print Network [OSTI]

    Chen, H.; Deng, S.; Bruner, H.

    2003-01-01

    The Continuous Commissioning (CCSM) process has become a very important energy conservation topic for new and existing commercial buildings. This process can yield substantial operating savings, improved indoor air quality, and enhanced occupant...

  9. Portsmouth Site Achieves Regulatory Milestone after Successful Controlled

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy Bills andOrder 422.1,anEnergy CompanyEnergy PortsmouthProjectBurn |

  10. Industrial Scale Demonstration of Smart Manufacturing Achieving...

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

    OFFICE Industrial Scale Demonstration of Smart Manufacturing Achieving Transformational Energy Productivity Gains Development of an Open Architecture, Widely Applicable Smart...

  11. The Australian National University Library 2014 Achievements

    E-Print Network [OSTI]

    The Australian National University Library 2014 Achievements anulib.anu.edu.au #12;Supporting of CSIRO Publishing, Andrew Stammer. The Australian National University Library -- 2014 Achievements 1 814% increase in e-resource downloads #12;The Australian National University Library -- 2014 Achievements 2

  12. Abstract--This paper presents an approach and associated circuitry for harvesting near maximum output from low power

    E-Print Network [OSTI]

    . Experimental results are presented for harvesting energy from miniature RF and wind power sources operating (PPT) and are commonly used in high power photovoltaic and wind power systems [4-5]. Existing that either inherently or by design achieve maximum output power over a wide power range when loaded

  13. Maximum entropy generation in open systems: the Fourth Law?

    E-Print Network [OSTI]

    Umberto Lucia

    2010-11-17

    This paper develops an analytical and rigorous formulation of the maximum entropy generation principle. The result is suggested as the Fourth Law of Thermodynamics.

  14. Achieving Water-Sustainable Bioenergy Production | Department...

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

    Production Breakout Session 3-A: Growing a Water-Smart Bioeconomy Achieving Water-Sustainable Bioenergy Production May Wu, Principal Environmental System Analyst in the...

  15. NERSC HPC Achievements Award Recipients for 2013

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

    Scientific Computing Center (NERSC) announced the winners of their inaugural High Performance Computing (HPC) Achievement Awards on Wednesday at the annual NERSC User Group meeting...

  16. ORISE: Beryllium laboratory achieves accreditation from College...

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

    Beryllium laboratory achieves accreditation from College of American Pathologists ORISE beryllium laboratory in Oak Ridge accredited for the third time since 2009 FOR IMMEDIATE...

  17. Predicting Customer Behavior using Naive Bayes and Maximum Entropy

    E-Print Network [OSTI]

    Keysers, Daniel

    of returned goods, we additionally generated two binary features for zero and missing values. The remaining Naive Bayes, Maximum Entropy, Neural Networks and Logistic Regression for classification of cus- tomer classifiers won the Data-Mining-Cup in 2004. Combining Logistic Regression, Neural Networks, and Maximum

  18. Maximum oxidative phosphorylation capacity of the mammalian heart

    E-Print Network [OSTI]

    Mootha, Vamsi K.

    Maximum oxidative phosphorylation capacity of the mammalian heart VAMSI K. MOOTHA, ANDREW E. ARAI, AND ROBERT S. BALABAN Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National. Maximum oxidative phosphorylation capacity of the mammalian heart. Am. J. Physiol. 272 (Heart Circ

  19. On Achieving Optimal Throughput with Network Coding

    E-Print Network [OSTI]

    Li, Baochun

    to the problem of optimizing end-to- end throughput in undirected data networks. We first illustrate the powerOn Achieving Optimal Throughput with Network Coding Zongpeng Li, Baochun Li, Dan Jiang, Lap Chi Lau Abstract-- With the constraints of network topologies and link capacities, achieving the optimal end

  20. NATIONAL PLAN TO ACHIEVE MARITIME DOMAIN AWARENESS

    E-Print Network [OSTI]

    Huang, Wei

    NATIONAL PLAN TO ACHIEVE MARITIME DOMAIN AWARENESS FOR THE NATIONAL STRATEGY FOR MARITIME SECURITY OCTOBER 2005 #12;National Strategy for Maritime Security: National Plan to Achieve Maritime Domain Awareness i FOREWORD By signing National Security Presidential Directive-41/Homeland Security Presidential

  1. Greenidge multi-pollutant project achieves emissions reduction goals

    SciTech Connect (OSTI)

    NONE

    2008-07-01

    Performance testing at the Greenridge Multi-Pollutant Project has met or exceeded project goals, indicating that deep emission reduciton sin small, difficult-to-retrofit power plants can be achieved. The technology fitted at the 107 MWe AES Greenridge Unit 4 includes a hybrid selective non-catalytic reduction/selective catalytic reduction system for NOx control (NOxOUT CASCADE) and a Turbosorp circulating fluidized bed dry scrubber system for SO{sub 2}, mercury, SO{sub 3} HC and Hf control. 2 figs.

  2. Maximum Instantaneous Power Estimation by Subgraph Coloring UCSD CSE Dept.

    E-Print Network [OSTI]

    Liu, Bao

    cycle helps in building a maximum envelope currents waveform for each net and providing a MIP upper process technology advancement integrates millions of gates on a single chip and introduces increasing

  3. Multi-Class Classification with Maximum Margin Multiple Kernel

    E-Print Network [OSTI]

    Mohri, Mehryar

    (named OBSCURE and UFO-MKL, respectively) are used to optimize primal versions of equivalent problems), the OBSCURE and UFO-MKL algorithms are compared against MCMKL #12;Multi-Class Classification with Maximum

  4. A magmatic trigger for the Paleocene-Eocene thermal maximum?

    E-Print Network [OSTI]

    Dubin, Andrea Rose

    2015-01-01

    Fifty-six million years ago Earth experienced rapid global warming (~6°C) that was caused by the release of large amounts of carbon into the ocean-atmosphere system. This Paleocene-Eocene Thermal Maximum (PETM) is often ...

  5. Maximum likelihood analysis of low energy CDMS II germanium data

    E-Print Network [OSTI]

    Agnese, R.

    We report on the results of a search for a Weakly Interacting Massive Particle (WIMP) signal in low-energy data of the Cryogenic Dark Matter Search experiment using a maximum likelihood analysis. A background model is ...

  6. Maximum containment : the most controversial labs in the world

    E-Print Network [OSTI]

    Bruzek, Alison K. (Allison Kim)

    2013-01-01

    In 2002, following the September 11th attacks and the anthrax letters, the United States allocated money to build two maximum containment biology labs. Called Biosafety Level 4 (BSL-4) facilities, these labs were built to ...

  7. Maximum Photovoltaic Penetration Levels on Typical Distribution Feeders: Preprint

    SciTech Connect (OSTI)

    Hoke, A.; Butler, R.; Hambrick, J.; Kroposki, B.

    2012-07-01

    This paper presents simulation results for a taxonomy of typical distribution feeders with various levels of photovoltaic (PV) penetration. For each of the 16 feeders simulated, the maximum PV penetration that did not result in steady-state voltage or current violation is presented for several PV location scenarios: clustered near the feeder source, clustered near the midpoint of the feeder, clustered near the end of the feeder, randomly located, and evenly distributed. In addition, the maximum level of PV is presented for single, large PV systems at each location. Maximum PV penetration was determined by requiring that feeder voltages stay within ANSI Range A and that feeder currents stay within the ranges determined by overcurrent protection devices. Simulations were run in GridLAB-D using hourly time steps over a year with randomized load profiles based on utility data and typical meteorological year weather data. For 86% of the cases simulated, maximum PV penetration was at least 30% of peak load.

  8. Filtering Additive Measurement Noise with Maximum Entropy in the Mean

    E-Print Network [OSTI]

    Henryk Gzyl; Enrique ter Horst

    2007-09-04

    The purpose of this note is to show how the method of maximum entropy in the mean (MEM) may be used to improve parametric estimation when the measurements are corrupted by large level of noise. The method is developed in the context on a concrete example: that of estimation of the parameter in an exponential distribution. We compare the performance of our method with the bayesian and maximum likelihood approaches.

  9. Achieving Net Zero: Climate Change & Sustainability

    E-Print Network [OSTI]

    Rose, Michael R.

    Achieving Net Zero: Climate Change & Sustainability University of California, Irvine #12 & Energy Services Coordinator, Facilities Management Tanya Harris - A/P Administrative Specialist in environmental stewardship for decades. Operational staff began implementing progressive programs for energy

  10. From Earth to Saturn: Los Alamos Achievements

    ScienceCinema (OSTI)

    McMillan, Charlie; Wilson, Cathy; Nekimkem, Howard; Martinez, Johnnie; Martz, Joe; Albright, Brian

    2014-08-13

    A compilation of some of the remarkable achievements of Los Alamos National Laboratory staff over the past 12 months. Originally aired in the June 26, 2008 Director's all-employee meeting.

  11. Low Voltage White Phosphorescent OLED Achievements

    Broader source: Energy.gov [DOE]

    Universal Display Corporation (UDC) and its research partners at Princeton University and the University of Southern California have succeeded in developing a white phosphorescent OLED (PHOLED™) that achieved a record efficiency of 20 lumens per watt. This achievement is the result of the team's collaborative efforts to increase the efficiency of PHOLED lighting by focusing on two critical factors: lowering the drive voltages and increasing the amount of light extracted.

  12. Achievable Transmission Capacity of Cognitive Mesh Networks With Different Media Access

    E-Print Network [OSTI]

    Cheng, Xiuzhen "Susan"

    Achievable Transmission Capacity of Cognitive Mesh Networks With Different Media Access Control Tao, Beijing Jiaotong University, China 2Computer Science, The George Washington University, DC, USA E broadband access. In this paper we investigate the achievable transmission capacity of a wireless backhaul

  13. Heat rate and maximum load capability improvements through cycle isolation

    SciTech Connect (OSTI)

    Coons, K. [Coronado Generating Station, Saint Johns, AZ (United States); Dimmick, J.G. [Leak Detection Services, Inc., Annapolis, MD (United States)

    1995-06-01

    Major improvements in maximum load capability and gross turbine heat rate were obtained at Salt River Project`s Coronado Unit 1, resulting from work done during the Spring 1993 overhaul. Corrected maximum load increased by 13.1 MW -- from 403.8 MW prior to the overhaul compared to 416.9 MW after the overhaul. Corrected gross turbine heat rate was reduced 270 BTU/kWH -- from 7,920 BTU/kWH before the overhaul to 7,650 BTU/kWH after the overhaul. Of the work done, the repair of leaking valves had the largest impact on cycle performance. The reduction of cycle leakage accounted for an increase of 9.9 MW in maximum load capability and a reduction to gross turbine heat rate of 190 BTU. Weekly maximum load tests, which started in August 1992 with the installation of an on-line monitoring system, show that maximum load had decreased approximately 4 MW during the six months prior to the overhaul. During this time there were no significant changes in HP or IP efficiencies, or any other directly-measured cycle parameters. Therefore, this degradation was attributed to cycle isolation valve leakage. Acoustic emission leak detection methods were used to identify leaking valves prior to the outage. Of the 138 valves tested for leakage, 31 valves had medium to very large leaks. Of these 31 leaking valves identified, 30 were repaired or replaced.

  14. Maximum-Entropy Inference with a Programmable Annealer

    E-Print Network [OSTI]

    Chancellor, Nicholas; Vinci, Walter; Aeppli, Gabriel; Warburton, Paul A

    2015-01-01

    Optimisation problems in science and engineering typically involve finding the ground state (i.e. the minimum energy configuration) of a cost function with respect to many variables. If the variables are corrupted by noise then this approach maximises the likelihood that the solution found is correct. An alternative approach is to make use of prior statistical information about the noise in conjunction with Bayes's theorem. The maximum entropy solution to the problem then takes the form of a Boltzmann distribution over the ground and excited states of the cost function. Here we use a programmable Josephson junction array for the information decoding problem which we simulate as a random Ising model in a field. We show experimentally that maximum entropy decoding at finite temperature can in certain cases give competitive and even slightly better bit-error-rates than the maximum likelihood approach at zero temperature, confirming that useful information can be extracted from the excited states of the annealing...

  15. NGC2613, 3198, 6503, 7184: Case studies against `maximum' disks

    E-Print Network [OSTI]

    B. Fuchs

    1998-12-02

    Decompositions of the rotation curves of NGC2613, 3198, 6505, and 7184 are analysed. For these galaxies the radial velocity dispersions of the stars have been measured and their morphology is clearly discernible. If the parameters of the decompositions are chosen according to the `maximum' disk hypothesis, the Toomre Q stability parameter is systematically less than one and the multiplicities of the spiral arms as expected from density wave theory are inconsitent with the observed morphologies of the galaxies. The apparent Q<1 instability, in particular, is a strong argument against the `maximum' disk hypothesis.

  16. Efficiency of autonomous soft nano-machines at maximum power

    E-Print Network [OSTI]

    Udo Seifert

    2010-11-11

    We consider nano-sized artificial or biological machines working in steady state enforced by imposing non-equilibrium concentrations of solutes or by applying external forces, torques or electric fields. For unicyclic and strongly coupled multicyclic machines, efficiency at maximum power is not bounded by the linear response value 1/2. For strong driving, it can even approach the thermodynamic limit 1. Quite generally, such machines fall in three different classes characterized, respectively, as "strong and efficient", "strong and inefficient", and "balanced". For weakly coupled multicyclic machines, efficiency at maximum power has lost any universality even in the linear response regime.

  17. Idaho Site Contractor Achieves Treatment Project Milestone

    Broader source: Energy.gov [DOE]

    IDAHO FALLS, Idaho – The Idaho site’s main cleanup contractor recently achieved a major performance milestone by successfully passing an operational readiness review for a first-of-a-kind facility that will treat the remaining 900,000 gallons of liquid radioactive waste generated by the site’s legacy cleanup mission.

  18. Celebrating Our Achievements... Building Our Future

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Celebrating Our Achievements... Building Our Future UC SANTA CRUZUC SANTA CRUZ University for the visual arts 9 A library for the future 10 Ali Akbar Khan honored 12 Protecting marine mammals 13 New­2000 and presents a wide range of opportunities to invest in the future of the campus. The campus has won national

  19. Software Analytics: Achievements and Challenges Dongmei Zhang

    E-Print Network [OSTI]

    Xie, Tao

    Software Analytics: Achievements and Challenges Dongmei Zhang Microsoft Research Asia Beijing, USA Email: xie@csc.ncsu.edu Abstract--A huge wealth of various data exist in the practice of software development. Further rich data are produced by modern software and services in operation, many of which tend

  20. Distributed Computation of Maximum Lifetime Spanning Subgraphs in Sensor Networks

    E-Print Network [OSTI]

    ­ Helsinki University of Technology, P.O. Box 5400, FI-02015 TKK, Finland Harri.Haanpaa@tkk.fi, Andre levels to the battery-operated nodes so that under a uniform traffic load the net- work remains connected for a maximum length of time [2]. We consider the case where the nodes are non-mobile and the power levels, once

  1. Tree-ring reconstruction of maximum and minimum temperatures

    E-Print Network [OSTI]

    -width (RW) and maximum density (MXD) series from treeline sites across Interior British Columbia. Multi- ple at these temperature-limited sites may be more closely related to Tmax than Tmean or Tmin; (3) recently reported in the relationships between ring-width (RW), maxi- mum latewood density (MXD) and May-August Tmean were observed

  2. Maximization of Recursive Utilities: A Dynamic Maximum Principle Approach

    E-Print Network [OSTI]

    Di Girolami, Cristina

    Maximization of Recursive Utilities: A Dynamic Maximum Principle Approach Wahid FAIDI LAMSIN, ENIT for a class of robust utility function introduced in Bordigoni, Matoussi et Schweizer (2005). Our method-investment strategy which is characterized as the unique solution of a forward-backward system. Key words : Utility

  3. The Evolution of Maximum Body Size of Terrestrial Mammals

    E-Print Network [OSTI]

    Brown, James H.

    The Evolution of Maximum Body Size of Terrestrial Mammals Felisa A. Smith,1 * Alison G. Boyer,2 the primary driver for the evolution of giant mammals was diversification to fill ecological niches extracted from the Paleobiology Database (12), using the range- through option for each interval of time. We

  4. Multiresolution Maximum Intensity Volume Rendering by Morphological Pyramids

    E-Print Network [OSTI]

    Roerdink, Jos B.T.M.

    to wavelet splatting, the main differences being that (i) linear summation of voxel values is replaced by maximum computation, and (ii) linear wavelet filters are replaced by (nonlinear) morphological filters. 1 on wavelets [4, 12, 18]. Recent methods for X-ray rendering include wavelet splatting [7, 8], which extends

  5. Multiresolution Maximum Intensity Volume Rendering by Morphological Adjunction Pyramids

    E-Print Network [OSTI]

    Roerdink, Jos B.T.M.

    to wavelet splatting, the main differences being that (i) linear summation of voxel values is replaced by maximum computation, and (ii) linear wavelet filters are replaced by (nonlinear) morphological filters wavelet splatting [11,12], which extends splatting [27] by using wavelets as reconstruction filters

  6. Maximum likelihood estimation of the equity Efstathios Avdis

    E-Print Network [OSTI]

    Kahana, Michael J.

    premium is usually estimated by taking the sample mean of stock returns and subtracting a measure the expected return on the aggregate stock market less the government bill rate, is of central importance an alternative esti- mator, based on maximum likelihood, that takes into account informa- tion contained

  7. "Maximum recycling of Material and Energy, Minimum of Landfilling"

    E-Print Network [OSTI]

    Columbia University

    lack of Waste-to-Energy capacity. #12;9 Austria As Germany, but Ban in force already in 2002. Landfill1 "Maximum recycling of Material and Energy, Minimum of Landfilling" "A Sustainable Solution" Håkan in "Recycling". "Waste-to-Energy" is now defined as Recycling, when energy efficiency is > 0,65 Prevention Reuse

  8. Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint

    E-Print Network [OSTI]

    Greenberg, Albert

    Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint Zhe Wang Electrical--In this paper, we develop efficient algorithm to obtain the optimal energy schedule for fading channel with energy harvesting. We assume that the side information of both the channel states and energy harvesting

  9. The Entropy of the Universe and the Maximum Entropy Production

    E-Print Network [OSTI]

    Lineweaver, Charles H.

    Chapter 22 The Entropy of the Universe and the Maximum Entropy Production Principle Charles H. Lineweaver Abstract If the universe had been born in a high entropy, equilibrium state, there would be no stars, no planets and no life. Thus, the initial low entropy of the universe is the fundamental reason

  10. What is a Hurricane? Tropical system with maximum sustained

    E-Print Network [OSTI]

    Meyers, Steven D.

    Hurricane 101 #12;What is a Hurricane? · Tropical system with maximum sustained surface wind of 74 mph or greater. A hurricane is the worst and the strongest of all tropical systems. · Also known as a tropical cyclone. #12;Hurricanes in Florida · 1851-2004 Florida's Hurricane Total: 110 Southwest Florida

  11. Secretary's 2013 Achievement Awards | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterestedReplacement-2-AA-1ResearchUniversityPreparedAwards Secretary's 2013 Achievement

  12. Secretary's 2014 Achievement Awards | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterestedReplacement-2-AA-1ResearchUniversityPreparedAwards Secretary's4 Achievement

  13. Secretary's Achievement Award | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterestedReplacement-2-AA-1ResearchUniversityPreparedAwardsAchievement Award Secretary's

  14. Secretary's Achievment Award | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterestedReplacement-2-AA-1ResearchUniversityPreparedAwardsAchievement Award

  15. Soybean Insect Control Suggestions. 

    E-Print Network [OSTI]

    Drees, B.M.

    1985-01-01

    Protecting Bees and Other Pollinators from Insecticides .............................. 10 Policy Statement for Making Chemical Control Recommendations ....................... 11 Soybean Insect Control Suggestions (chart) ... 12 Conversion Table... and maximum coverage. When making any insecticide applications, follow label directions. Refer to the ((Protecting Bees and other Pollinators from Insecticides" section of this bulletin to avoid bee losses. Biological Insecticides ':,.,.dcillus...

  16. Isuzu's new 12. 0L micro-computer controlled turbocharged diesel engine

    SciTech Connect (OSTI)

    Wakabayashi, M.; Sakata, S.; Hamanaka, K.

    1984-01-01

    Isuzu Motors Limited introduced in the Japanese market a new micro-computer controlled turbocharged 6RA1TC diesel engine which powers new Isuzu heavy-duty trucks in 1983. This engine has successfully achieved both fuel economy and vehicle performance. This was realized by the combination of the newly developed micro-computer controlled fuel injection system and turbocharged air-to-air intercooled four valve low friction diesel engine. The purpose of the computer control system is flexible and precise control of fuel flow rate and fuel injection timing. This provides maximum engine performance and driveability, best fuel economy combined with the gearing of the vehicle, and easy operation for drivers. Additionally, this engine offers the following features: Good cold startability; Constant speed Cruise Control; Automatic schedule idling speed during warm-up; Stable low speed idling; Light and quick throttle response; Monitoring display for best fuel economy operation; Monitor display for engine diagnosis.

  17. Maximum Entropy Principle and the Higgs Boson Mass

    E-Print Network [OSTI]

    Alves, Alexandre; da Silva, Roberto

    2014-01-01

    A successful connection between Higgs boson decays and the Maximum Entropy Principle is presented. Based on the information theory inference approach we determine the Higgs boson mass as $M_H= 125.04\\pm 0.25$ GeV, a value fully compatible to the LHC measurement. This is straightforwardly obtained by taking the Higgs boson branching ratios as the target probability distributions of the inference, without any extra assumptions beyond the Standard Model. Yet, the principle can be a powerful tool in the construction of any model affecting the Higgs sector. We give, as an example, the case where the Higgs boson has an extra invisible decay channel. Our findings suggest that a system of Higgs bosons undergoing a collective decay to Standard Model particles is among the most fundamental ones where the Maximum Entropy Principle applies.

  18. Maximum Entropy Principle and the Higgs Boson Mass

    E-Print Network [OSTI]

    Alexandre Alves; Alex G. Dias; Roberto da Silva

    2014-11-18

    A successful connection between Higgs boson decays and the Maximum Entropy Principle is presented. Based on the information theory inference approach we determine the Higgs boson mass as $M_H= 125.04\\pm 0.25$ GeV, a value fully compatible to the LHC measurement. This is straightforwardly obtained by taking the Higgs boson branching ratios as the target probability distributions of the inference, without any extra assumptions beyond the Standard Model. Yet, the principle can be a powerful tool in the construction of any model affecting the Higgs sector. We give, as an example, the case where the Higgs boson has an extra invisible decay channel. Our findings suggest that a system of Higgs bosons undergoing a collective decay to Standard Model particles is among the most fundamental ones where the Maximum Entropy Principle applies.

  19. The Prediction of the Maximum Modes of Decay of Mesons

    E-Print Network [OSTI]

    Ramanna, R

    1999-01-01

    In an earlier work, several properties of fundamental particles were brought together by a simple equation based on continuity and discreteness. It is shown here, that the maximum modes of decay of all fundamental particles can also be predicted without any arbitrary parameters. The method used is to break up the mean lifetimes of particles to obtain the maximum modes of decay. This is done by using a binary expansion of $\\hbar/MT$ where M is the mass of the particle and T is the mean lifetime. The agreements between that obtained from theory and experiment are remarkable. The ordering of the flavours plays an important part in understanding the reasons for this agreement. It is shown that the Zeno effect in Quantum mechanics is connected with use of the binary series.

  20. The Prediction of the Maximum Modes of Decay of Mesons

    E-Print Network [OSTI]

    Raja Ramanna

    1999-04-27

    In an earlier work, several properties of fundamental particles were brought together by a simple equation based on continuity and discreteness. It is shown here, that the maximum modes of decay of all fundamental particles can also be predicted without any arbitrary parameters. The method used is to break up the mean lifetimes of particles to obtain the maximum modes of decay. This is done by using a binary expansion of $\\hbar/MT$ where M is the mass of the particle and T is the mean lifetime. The agreements between that obtained from theory and experiment are remarkable. The ordering of the flavours plays an important part in understanding the reasons for this agreement. It is shown that the Zeno effect in Quantum mechanics is connected with use of the binary series.

  1. Optimal Control Theory for Continuous Variable Quantum Gates

    E-Print Network [OSTI]

    Rebing Wu; Raj Chakrabarti; Herschel Rabitz

    2007-08-16

    We apply the methodology of optimal control theory to the problem of implementing quantum gates in continuous variable systems with quadratic Hamiltonians. We demonstrate that it is possible to define a fidelity measure for continuous variable (CV) gate optimization that is devoid of traps, such that the search for optimal control fields using local algorithms will not be hindered. The optimal control of several quantum computing gates, as well as that of algorithms composed of these primitives, is investigated using several typical physical models and compared for discrete and continuous quantum systems. Numerical simulations indicate that the optimization of generic CV quantum gates is inherently more expensive than that of generic discrete variable quantum gates, and that the exact-time controllability of CV systems plays an important role in determining the maximum achievable gate fidelity. The resulting optimal control fields typically display more complicated Fourier spectra that suggest a richer variety of possible control mechanisms. Moreover, the ability to control interactions between qunits is important for delimiting the total control fluence. The comparative ability of current experimental protocols to implement such time-dependent controls may help determine which physical incarnations of CV quantum information processing will be the easiest to implement with optimal fidelity.

  2. Savannah River Site Achieves Waste Transfer First

    Broader source: Energy.gov [DOE]

    AIKEN, S.C. – The EM program and its liquid waste contractor at the Savannah River Site (SRS) made history recently by safely transferring radioactive liquid waste from F Tank Farm to H Tank Farm using a central control room.

  3. Maximum entropy method for reconstruction of the CMB images

    E-Print Network [OSTI]

    A. T. Bajkova

    2002-05-21

    We propose a new approach for the accurate reconstruction of cosmic microwave background distributions from observations containing in addition to the primary fluctuations the radiation from unresolved extragalactic point sources and pixel noise. The approach uses some effective realizations of the well-known maximum entropy method and principally takes into account {\\it a priori} information about finiteness and spherical symmetry of the power spectrum of the CMB satisfying the Gaussian statistics.

  4. Max '91: flare research at the next solar maximum

    SciTech Connect (OSTI)

    Dennis, B.; Canfield, R.; Bruner, M.; Emslie, G.; Hildner, E.; Hudson, H.; Hurford, G.; Lin, R.; Novick, R.; Tarbell, T.

    1988-01-01

    To address the central scientific questions surrounding solar flares, coordinated observations of electromagnetic radiation and energetic particles must be made from spacecraft, balloons, rockets, and ground-based observatories. A program to enhance capabilities in these areas in preparation for the next solar maximum in 1991 is recommended. The major scientific issues are described, and required observations and coordination of observations and analyses are detailed. A program plan and conceptual budgets are provided.

  5. Maximum Entry and Mandatory Separation Ages for Certain Security Employees

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2001-10-11

    The policy establishes the DOE policy on maximum entry and mandatory separation ages for primary or secondary positions covered under special statutory retirement provisions and for those employees whose primary duties are the protection of officials of the United States against threats to personal safety or the investigation, apprehension, and detention of individuals suspected or convicted of offenses against the criminal laws of the United States. Admin Chg 1, dated 12-1-11, supersedes DOE P 310.1.

  6. Maximum patch method for directional dark matter detection

    SciTech Connect (OSTI)

    Henderson, Shawn; Monroe, Jocelyn; Fisher, Peter [Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Laboratory for Nuclear Science, MIT Kavli Institute for Astrophysics and Space Research, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

    2008-07-01

    Present and planned dark matter detection experiments search for WIMP-induced nuclear recoils in poorly known background conditions. In this environment, the maximum gap statistical method provides a way of setting more sensitive cross section upper limits by incorporating known signal information. We give a recipe for the numerical calculation of upper limits for planned directional dark matter detection experiments, that will measure both recoil energy and angle, based on the gaps between events in two-dimensional phase space.

  7. PNNL: A Supervised Maximum Entropy Approach to Word Sense Disambiguation

    SciTech Connect (OSTI)

    Tratz, Stephen C.; Sanfilippo, Antonio P.; Gregory, Michelle L.; Chappell, Alan R.; Posse, Christian; Whitney, Paul D.

    2007-06-23

    In this paper, we described the PNNL Word Sense Disambiguation system as applied to the English All-Word task in Se-mEval 2007. We use a supervised learning approach, employing a large number of features and using Information Gain for dimension reduction. Our Maximum Entropy approach combined with a rich set of features produced results that are significantly better than baseline and are the highest F-score for the fined-grained English All-Words subtask.

  8. Maximum Power Transfer Tracking for a Photovoltaic-Supercapacitor Energy System

    E-Print Network [OSTI]

    Pedram, Massoud

    Maximum Power Transfer Tracking for a Photovoltaic-Supercapacitor Energy System Younghyun KimPconverter Ppv Pcharge Varying Pleak PV array Supercapacitor Figure 1: Photovoltaic-supercapacitor energy system Keywords Maximum power transfer tracking, Photovoltaic, Supercapacitor 1. INTRODUCTION Maximum energy

  9. Texas 4-H Member Achievement Plan 

    E-Print Network [OSTI]

    Lepley, Toby

    2000-08-07

    Achievement Plan (M.A.P.) will help 4-H members develop skills in record keeping and organization. Younger 4-H members are encouraged to record information directly on the form. Older 4-H members can use the M.A.P. as a reference for informa- tion that you... to hold on to your memories about each incredible year you have in 4-H. In a couple of years, you can look back on these journals and remem- ber what fun you had. Record keeping is also a great way to develop your skills in organizing your time, com...

  10. Roadmap to Achieve Energy Delivery Systems Cybersecurity

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMay 13, 2015 TheTechnologies-2015 Updateremoveto Achieve

  11. NERSC Announces Second Annual HPC Achievement Awards

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework usesof Energy Moving ForwardAchievement Awards

  12. WHY DO DIFFERENCES BETWEEN STATE-MEASURED ACHIEVEMENT GAPS AND NATIONALLY-MEASURED ACHIEVEMENT GAPS EXIST?

    E-Print Network [OSTI]

    Courtney, Christina Leigh

    2014-08-31

    of difference, the differential quotient, is determined. For the purposes of this dissertation, I calculated the reported achievement gaps between white and black fourth graders for the years 2005, 2007, and 2009 on the individual state reading and math...

  13. Evaluation of a photovoltaic energy mechatronics system with a built-in quadratic maximum power point tracking algorithm

    SciTech Connect (OSTI)

    Chao, R.M.; Ko, S.H.; Lin, I.H. [Department of Systems and Naval Mechatronics Engineering, National Cheng Kung University, Tainan, Taiwan 701 (China); Pai, F.S. [Department of Electronic Engineering, National University of Tainan (China); Chang, C.C. [Department of Environment and Energy, National University of Tainan (China)

    2009-12-15

    The historically high cost of crude oil price is stimulating research into solar (green) energy as an alternative energy source. In general, applications with large solar energy output require a maximum power point tracking (MPPT) algorithm to optimize the power generated by the photovoltaic effect. This work aims to provide a stand-alone solution for solar energy applications by integrating a DC/DC buck converter to a newly developed quadratic MPPT algorithm along with its appropriate software and hardware. The quadratic MPPT method utilizes three previously used duty cycles with their corresponding power outputs. It approaches the maximum value by using a second order polynomial formula, which converges faster than the existing MPPT algorithm. The hardware implementation takes advantage of the real-time controller system from National Instruments, USA. Experimental results have shown that the proposed solar mechatronics system can correctly and effectively track the maximum power point without any difficulties. (author)

  14. Design to Achieve Fault Tolerance and Resilience

    SciTech Connect (OSTI)

    Ted Quinn; Richard Bockhorst; Craig Peterson; Gregg Swindlehurst

    2012-09-01

    The purpose of this report is to provide initial scoping for follow on work designed to improve nuclear plant operation. The focus of this report is twofold. Selected trips over the last five years are examined to determine if there are potential opportunities to automate tasks that are currently performed manually. The second area is to evaluate the potential for avoiding reactor trips by reducing power in a controlled manner upon the loss of turbine generator load. Some candidate opportunities to reduce the frequency on reactor trips identified in this report are redundant feedwater controls, automated response to a feedwater or condensate pump trip reducing power vice a reactor trip, and elimination of air operators for the feedwater control valves or providing redundant air supplies.

  15. Robust Maximum Lifetime Routing and Energy Allocation in Wireless Sensor Networks

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

    Paschalidis, Ioannis Ch.; Wu, Ruomin

    2012-01-01

    We consider the maximum lifetime routing problem in wireless sensor networks in two settings: (a) when nodes’ initial energy is given and (b) when it is subject to optimization. The optimal solution and objective value provide optimal flows and the corresponding predicted lifetime, respectively. We stipulate that there is uncertainty in various network parameters (available energy and energy depletion rates). In setting (a) we show that for specific, yet typical, network topologies, the actual network lifetime will reach the predicted value with a probability that converges to zero as the number of nodes grows large. In setting (b) the samemore »result holds for all topologies. We develop a series of robust problem formulations, ranging from pessimistic to optimistic. A set of parameters enable the tuning of the conservatism of the formulation to obtain network flows with a desirably high probability that the corresponding lifetime prediction is achieved. We establish a number of properties for the robust network flows and energy allocations and provide numerical results to highlight the tradeoff between predicted lifetime and the probability achieved. Further, we analyze an interesting limiting regime of massively deployed sensor networks and essentially solve a continuous version of the problem.« less

  16. Achieving Sustainability inCalifornia’s CentralValley

    E-Print Network [OSTI]

    Lubell, Mark; Beheim, Bret; Hillis, Vicken; Handy, Susan L.

    2009-01-01

    of agricultural sustainability. ” Agriculture, Ecosystems &19, 2009. Achieving Sustainability in California’s Centralvariables. Achieving Sustainability in California’s Central

  17. Application of Synergistic Technologies to Achieve High Levels...

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

    Synergistic Technologies to Achieve High Levels of Gasoline Engine Downsizing Application of Synergistic Technologies to Achieve High Levels of Gasoline Engine Downsizing Discussed...

  18. Forest County Potawatomi Recognized for Renewable Energy Achievements...

    Energy Savers [EERE]

    Forest County Potawatomi Recognized for Renewable Energy Achievements Forest County Potawatomi Recognized for Renewable Energy Achievements May 28, 2014 - 5:53pm Addthis A...

  19. DOE Researchers Achieve Important Genetic Breakthroughs to Help...

    Energy Savers [EERE]

    DOE Researchers Achieve Important Genetic Breakthroughs to Help Develop Cheaper Biofuels DOE Researchers Achieve Important Genetic Breakthroughs to Help Develop Cheaper Biofuels...

  20. Roadmap to Achieve Energy Delivery Systems Cybersecurity - 2011...

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

    Roadmap to Achieve Energy Delivery Systems Cybersecurity - 2011 Roadmap to Achieve Energy Delivery Systems Cybersecurity - 2011 As part of the Obama Administration's goals to...

  1. Advanced Mixed Waste Treatment Project Achieves Impressive Safety...

    Office of Environmental Management (EM)

    Advanced Mixed Waste Treatment Project Achieves Impressive Safety and Production Marks Advanced Mixed Waste Treatment Project Achieves Impressive Safety and Production Marks June...

  2. 3 Ways Solar Energy Programs Are Helping Achieve President Obama...

    Energy Savers [EERE]

    3 Ways Solar Energy Programs Are Helping Achieve President Obama's Climate Goals 3 Ways Solar Energy Programs Are Helping Achieve President Obama's Climate Goals September 8, 2015...

  3. Los Angeles County's Green Idea House Achieves Efficient Goals...

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

    County's Green Idea House Achieves Efficient Goals Los Angeles County's Green Idea House Achieves Efficient Goals Photo of an energy-efficient home with modern architecture. The...

  4. Dynalene Fuel Cell Coolants Achieve Commercial Success | Department...

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

    Dynalene Fuel Cell Coolants Achieve Commercial Success Dynalene Fuel Cell Coolants Achieve Commercial Success August 26, 2014 - 12:34pm Addthis Dynalene Inc. of Whitehall,...

  5. Greensburg Implements High-Efficiency Building Codes to Achieve...

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

    Greensburg Implements High-Efficiency Building Codes to Achieve Long-Term Energy Savings Greensburg Implements High-Efficiency Building Codes to Achieve Long-Term Energy Savings...

  6. Overcoming the Barrier to Achieving Large-Scale Production -...

    Office of Environmental Management (EM)

    Overcoming the Barrier to Achieving Large-Scale Production - A Case Study Overcoming the Barrier to Achieving Large-Scale Production - A Case Study This presentation summarizes the...

  7. Marine Corps Base Quantico Achieves 85% Savings in Parking Lighting...

    Energy Savers [EERE]

    Marine Corps Base Quantico Achieves 85% Savings in Parking Lighting Marine Corps Base Quantico Achieves 85% Savings in Parking Lighting Marine Corps Base Quantico (MCBQ) in...

  8. Maximum likelihood method for cross-correlations with astrophysical sources

    SciTech Connect (OSTI)

    Jansson, Ronnie; Farrar, Glennys R, E-mail: rj486@nyu.edu, E-mail: gf25@nyu.edu [Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY 10003 (United States)

    2008-06-15

    We generalize the maximum likelihood-type method used to study cross-correlations between a catalog of candidate astrophysical sources and ultrahigh energy cosmic rays (UHECRs), to allow for differing source luminosities. The new method is applicable to any sparse dataset such as UHE gamma rays or astrophysical neutrinos. Performance of the original and generalized techniques is evaluated in simulations of various scenarios. Applying the new technique to data, we find an excess correlation of about nine events between HiRes UHECRs and known BLLacs, with a 6 Multiplication-Sign 10{sup -5} probability of such a correlation arising by chance.

  9. Generalized Maximum Likelihood Method for Ultrahigh Energy Cosmic Rays

    E-Print Network [OSTI]

    Glennys R. Farrar

    2008-10-01

    The Maximum Likelihood Method is generalized to include effects important for UHECR applications. The new approach can incorporate source distance constraints implied by the observed CR energy and can allow for energy uncertainties, possible deflection in magnetic fields, multiple source types, and a spectrum of CR composition. It can be efficiently implemented and does not require the unphysical "isotropic" assumption for unidentified sources. The approach optimizes the utility of UHECR data to discriminate between source classes and can help constrain galactic and extragalactic magnetic fields. Aspects of the method are directly applicable in other contexts, such as TeV gamma ray astrophysics.

  10. Maximum Likelihood Method for Cross Correlations with Astrophysical Sources

    E-Print Network [OSTI]

    Ronnie Jansson; Glennys R. Farrar

    2008-06-18

    We generalize the Maximum Likelihood-type method used to study cross correlations between a catalog of candidate astrophysical sources and Ultrahigh Energy Cosmic Rays (UHECRs), to allow for differing source luminosities. The new method is applicable to any sparse data set such as UHE gamma rays or astrophysical neutrinos. Performance of the original and generalized techniques is evaluated in simulations of various scenarios. Applying the new technique to data, we find an excess correlation of about 9 events between HiRes UHECRs and known BLLacs, with a 6*10^-5 probability of such a correlation arising by chance.

  11. 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

    2009-01-01

    stream_source_info TR-341 Bacteria TMDL Task Force Report Draft Four 6.4.07.pdf.txt stream_content_type text/plain stream_size 344770 Content-Encoding ISO-8859-1 stream_name TR-341 Bacteria TMDL Task Force Report Draft Four 6....4.07.pdf.txt Content-Type text/plain; charset=ISO-8859-1 TR-341 2009 Bacteria Total Maximum Daily Load Task Force Final Report By C. Allan Jones and Kevin Wagner, Texas Water Resources...

  12. Maximum Tension: with and without a cosmological constant

    E-Print Network [OSTI]

    Barrow, John D.; Gibbons, G. W.

    2014-12-04

    and the absence of any speed limit for information transmission. This unusual Newtonian behaviour has no general relativistic counterpart: two particles of mass M whose centres approach closer than d = 4GM=c2 will ?nd themselves inside a black hole horizon... , Ann. d Physik 11, 69 (1900); English translation in M. Planck, 1959, The Theory of Heat Radiation, transl. M. Masius, Dover, New York (1959). 11 Schiller C., 1997-2004, Maximum force a simple principle encompassing general relativity in C. Schiller...

  13. Better Nonlinear Models from Noisy Data: Attractors with Maximum Likelihood

    E-Print Network [OSTI]

    Patrick E. McSharry; Leonard A. Smith

    1999-11-30

    A new approach to nonlinear modelling is presented which, by incorporating the global behaviour of the model, lifts shortcomings of both least squares and total least squares parameter estimates. Although ubiquitous in practice, a least squares approach is fundamentally flawed in that it assumes independent, normally distributed (IND) forecast errors: nonlinear models will not yield IND errors even if the noise is IND. A new cost function is obtained via the maximum likelihood principle; superior results are illustrated both for small data sets and infinitely long data streams.

  14. The Maximum Value Method. (Conference) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail. (Conference)FeedbackProperties ofThe Maximum Value Method. Citation Details

  15. Low-Power Maximum Power Point Tracker with Digital Control for Thermophotovoltaic Generators

    E-Print Network [OSTI]

    Pilawa, Robert

    This paper describes the design, optimization, and evaluation of the power electronics circuitry for a low-power portable thermophotovotaic (TPV) generator system. TPV system is based on a silicon micro-reactor design and ...

  16. A Dynamic Voltage Scaling Controller for Maximum Energy Saving Across Full Range of Load Conditions

    E-Print Network [OSTI]

    Ng, Wai Tung

    to an explosive increase in both power density and total power consumption in modem VLSI circuits. In order or low power mode, energy saving from dynamic voltage scaling (DVS) is limited due to very poor efficiency of the PWM DC/DC converter operating at light load conditions, resulting in shorter than expected

  17. Low-Power Maximum Power Point Tracker with Digital Control for Thermophotovoltaic Generators

    E-Print Network [OSTI]

    Perreault, Dave

    energy conversion process. photons with energies above the PV diode bandgap can generate electron at more than two orders of magnitude higher energy densities than solar PV (as shown in Figure 1-power portable thermophotovotaic (TPV) generator system. TPV system is based on a silicon micro-reactor design

  18. Thermodynamics of Maximum Transition Entropy for Quantum Assemblies

    E-Print Network [OSTI]

    David M. Rogers

    2015-03-27

    This work presents a general unifying theoretical framework for quantum non-equilibrium systems. It is based on a re-statement of the dynamical problem as one of inferring the distribution of collision events that move a system toward thermal equilibrium from an arbitrary starting distribution. Using a form based on maximum entropy for this transition distribution leads to a statistical description of open quantum systems with strong parallels to the conventional, maximum-entropy, equilibrium thermostatics. A precise form of the second law of thermodynamics can be stated for this dynamics at every time-point in a trajectory. Numerical results are presented for low-dimensional systems interacting with cavity fields. The dynamics and stationary state are compared to a reference model of a weakly coupled oscillator plus cavity supersystem thermostatted by periodic partial measurements. Despite the absence of an explicit cavity in the present model of open quantum dynamics, both the relaxation rates and stationary state properties closely match the reference. Additionally, the time-course of energy exchange and entropy increase is given throughout an entire measurement process for a single spin system. The results show the process to be capable of initially absorbing heat when starting from a superposition state, but not from an isotropic distribution. Based on these results, it is argued that logical inference in the presence of environmental noise is sufficient to resolve the paradox of wavefunction collapse.

  19. Estimate of Maximum Underground Working Gas Storage Capacity in the United States

    Reports and Publications (EIA)

    2006-01-01

    This report examines the aggregate maximum capacity for U.S. natural gas storage. Although the concept of maximum capacity seems quite straightforward, there are numerous issues that preclude the determination of a definitive maximum volume. The report presents three alternative estimates for maximum capacity, indicating appropriate caveats for each.

  20. Economic Plantwide Control of the Cumene Process Vivek Gera,

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Economic Plantwide Control of the Cumene Process Vivek Gera, Mehdi Panahi, Sigurd Skogestad Chemical Engineering, Norwegian University of Science and Technology, Trondheim, Norway ABSTRACT: Economic operation. For economic plantwide control, the best pairings for tight control of the maximum throughput

  1. Reduction in maximum time uncertainty of paired time signals

    DOE Patents [OSTI]

    Theodosiou, G.E.; Dawson, J.W.

    1981-02-11

    Reduction in the maximum time uncertainty (t/sub max/ - t/sub min/) of a series of paired time signals t/sub 1/ and t/sub 2/ varying between two input terminals and representative of a series of single events where t/sub 1/ less than or equal to t/sub 2/ and t/sub 1/ + t/sub 2/ equals a constant, is carried out with a circuit utilizing a combination of OR and AND gates as signal selecting means and one or more time delays to increase the minimum value (t/sub min/) of the first signal t/sub 1/ closer to t/sub max/ and thereby reduce the difference. The circuit may utilize a plurality of stages to reduce the uncertainty by factors of 20 to 800.

  2. Improved Maximum Entropy Analysis with an Extended Search Space

    E-Print Network [OSTI]

    Alexander Rothkopf

    2013-01-07

    The standard implementation of the Maximum Entropy Method (MEM) follows Bryan and deploys a Singular Value Decomposition (SVD) to limit the dimensionality of the underlying solution space apriori. Here we present arguments based on the shape of the SVD basis functions and numerical evidence from a mock data analysis, which show that the correct Bayesian solution is not in general recovered with this approach. As a remedy we propose to extend the search basis systematically, which will eventually recover the full solution space and the correct solution. In order to adequately approach problems where an exponentially damped kernel is used, we provide an open-source implementation, using the C/C++ language that utilizes high precision arithmetic adjustable at run-time. The LBFGS algorithm is included in the code in order to attack problems without the need to resort to a particular search space restriction.

  3. Efficiency at maximum power of a chemical engine

    E-Print Network [OSTI]

    Hooyberghs, Hans; Salazar, Alberto; Indekeu, Joseph O; Broeck, Christian Van den

    2013-01-01

    A cyclically operating chemical engine is considered that converts chemical energy into mechanical work. The working fluid is a gas of finite-sized spherical particles interacting through elastic hard collisions. For a generic transport law for particle uptake and release, the efficiency at maximum power $\\eta$ takes the form 1/2+c\\Delta \\mu + O(\\Delta \\mu^2), with 1/2 a universal constant and $\\Delta \\mu$ the chemical potential difference between the particle reservoirs. The linear coefficient c is zero for engines featuring a so-called left/right symmetry or particle fluxes that are antisymmetric in the applied chemical potential difference. Remarkably, the leading constant in $\\eta$ is non-universal with respect to an exceptional modification of the transport law. For a nonlinear transport model we obtain \\eta = 1/(\\theta +1), with \\theta >0 the power of $\\Delta \\mu$ in the transport equation

  4. Fracture Toughness and Maximum Stress in a Disordered Lattice System

    E-Print Network [OSTI]

    Chiyori Urabe; Shinji Takesue

    2008-12-29

    Fracture in a disordered lattice system is studied. In our system, particles are initially arranged on the triangular lattice and each nearest-neighbor pair is connected with a randomly chosen soft or hard Hookean spring. Every spring has the common threshold of stress at which it is cut. We make an initial crack and expand the system perpendicularly to the crack. We find that the maximum stress in the stress-strain curve is larger than those in the systems with soft or hard springs only (uniform systems). Energy required to advance fracture is also larger in some disordered systems, which indicates that the fracture toughness improves. The increase of the energy is caused by the following two factors. One is that the soft spring is able to hold larger energy than the hard one. The other is that the number of cut springs increases as the fracture surface becomes tortuous in disordered systems.

  5. Speech processing using conditional observable maximum likelihood continuity mapping

    DOE Patents [OSTI]

    Hogden, John; Nix, David

    2004-01-13

    A computer implemented method enables the recognition of speech and speech characteristics. Parameters are initialized of first probability density functions that map between the symbols in the vocabulary of one or more sequences of speech codes that represent speech sounds and a continuity map. Parameters are also initialized of second probability density functions that map between the elements in the vocabulary of one or more desired sequences of speech transcription symbols and the continuity map. The parameters of the probability density functions are then trained to maximize the probabilities of the desired sequences of speech-transcription symbols. A new sequence of speech codes is then input to the continuity map having the trained first and second probability function parameters. A smooth path is identified on the continuity map that has the maximum probability for the new sequence of speech codes. The probability of each speech transcription symbol for each input speech code can then be output.

  6. Real Power and Reactive Power Control of a Three-Phase Single-Stage-PV System and PV voltage Stability

    SciTech Connect (OSTI)

    Li, Huijuan; Xu, Yan; Adhikari, Sarina; Rizy, D Tom; Li, Fangxing; Irminger, Philip

    2012-01-01

    Grid-connected photovoltaic (PV) systems with power electronic interfaces can provide both real and reactive power to meet power system needs with appropriate control algorithms. This paper presents the control algorithm design for a three-phase single-stage grid-connected PV inverter to achieve either maximum power point tracking (MPPT) or a certain amount of real power injection, as well as the voltage/var control. The switching between MPPT control mode and a certain amount of real power control mode is automatic and seamless. Without the DC-to-DC booster stage, PV DC voltage stability is an important issue in the control design especially when the PV inverter is operating at maximum power point (MPP) with voltage/var control. The PV DC voltage collapse phenomenon and its reason are discussed. The method based on dynamic correction of the PV inverter output is proposed to ensure PV DC voltage stability. Simulation results of the single-stage PV system during system disturbances and fast solar irradiation changes confirm that the proposed control algorithm for single-stage PV inverters can provide appropriate real and reactive power services and ensure PV DC voltage stability during dynamic system operation and atmospheric conditions.

  7. Weakest solar wind of the space age and the current 'MINI' solar maximum

    SciTech Connect (OSTI)

    McComas, D. J.; Angold, N.; Elliott, H. A.; Livadiotis, G.; Schwadron, N. A.; Smith, C. W.; Skoug, R. M.

    2013-12-10

    The last solar minimum, which extended into 2009, was especially deep and prolonged. Since then, sunspot activity has gone through a very small peak while the heliospheric current sheet achieved large tilt angles similar to prior solar maxima. The solar wind fluid properties and interplanetary magnetic field (IMF) have declined through the prolonged solar minimum and continued to be low through the current mini solar maximum. Compared to values typically observed from the mid-1970s through the mid-1990s, the following proton parameters are lower on average from 2009 through day 79 of 2013: solar wind speed and beta (?11%), temperature (?40%), thermal pressure (?55%), mass flux (?34%), momentum flux or dynamic pressure (?41%), energy flux (?48%), IMF magnitude (?31%), and radial component of the IMF (?38%). These results have important implications for the solar wind's interaction with planetary magnetospheres and the heliosphere's interaction with the local interstellar medium, with the proton dynamic pressure remaining near the lowest values observed in the space age: ?1.4 nPa, compared to ?2.4 nPa typically observed from the mid-1970s through the mid-1990s. The combination of lower magnetic flux emergence from the Sun (carried out in the solar wind as the IMF) and associated low power in the solar wind points to the causal relationship between them. Our results indicate that the low solar wind output is driven by an internal trend in the Sun that is longer than the ?11 yr solar cycle, and they suggest that this current weak solar maximum is driven by the same trend.

  8. Variable Selection for Modeling the Absolute Magnitude at Maximum of Type Ia Supernovae

    E-Print Network [OSTI]

    Uemura, Makoto; Kawabata, S; Ikeda, Shiro; Maeda, Keiichi

    2015-01-01

    We discuss what is an appropriate set of explanatory variables in order to predict the absolute magnitude at the maximum of Type Ia supernovae. In order to have a good prediction, the error for future data, which is called the "generalization error," should be small. We use cross-validation in order to control the generalization error and LASSO-type estimator in order to choose the set of variables. This approach can be used even in the case that the number of samples is smaller than the number of candidate variables. We studied the Berkeley supernova database with our approach. Candidates of the explanatory variables include normalized spectral data, variables about lines, and previously proposed flux-ratios, as well as the color and light-curve widths. As a result, we confirmed the past understanding about Type Ia supernova: i) The absolute magnitude at maximum depends on the color and light-curve width. ii) The light-curve width depends on the strength of Si II. Recent studies have suggested to add more va...

  9. CONTROL OF HEXAPEDAL PRONKING THROUGH A DYNAMICALLY EMBEDDED SPRING LOADED INVERTED PENDULUM TEMPLATE

    E-Print Network [OSTI]

    to achieve stable and controllable pronking for a planar, underactuated hexapod model, based on the idea

  10. Bayesian and maximum entropy methods for fusion diagnostic measurements with compact neutron spectrometers

    SciTech Connect (OSTI)

    Reginatto, Marcel; Zimbal, Andreas [Physikalisch-Technische Bundesanstalt, 38116 Braunschweig (Germany)

    2008-02-15

    In applications of neutron spectrometry to fusion diagnostics, it is advantageous to use methods of data analysis which can extract information from the spectrum that is directly related to the parameters of interest that describe the plasma. We present here methods of data analysis which were developed with this goal in mind, and which were applied to spectrometric measurements made with an organic liquid scintillation detector (type NE213). In our approach, we combine Bayesian parameter estimation methods and unfolding methods based on the maximum entropy principle. This two-step method allows us to optimize the analysis of the data depending on the type of information that we want to extract from the measurements. To illustrate these methods, we analyze neutron measurements made at the PTB accelerator under controlled conditions, using accelerator-produced neutron beams. Although the methods have been chosen with a specific application in mind, they are general enough to be useful for many other types of measurements.

  11. Combustion Process in a Spark Ignition Engine: Analysis of Cyclic Maximum Pressure and Peak Pressure Angle

    E-Print Network [OSTI]

    G. Litak; T. Kaminski; J. Czarnigowski; A. K. Sen; M. Wendeker

    2006-11-29

    In this paper we analyze the cycle-to-cycle variations of maximum pressure $p_{max}$ and peak pressure angle $\\alpha_{pmax}$ in a four-cylinder spark ignition engine. We examine the experimental time series of $p_{max}$ and $\\alpha_{pmax}$ for three different spark advance angles. Using standard statistical techniques such as return maps and histograms we show that depending on the spark advance angle, there are significant differences in the fluctuations of $p_{max}$ and $\\alpha_{pmax}$. We also calculate the multiscale entropy of the various time series to estimate the effect of randomness in these fluctuations. Finally, we explain how the information on both $p_{max}$ and $\\alpha_{pmax}$ can be used to develop optimal strategies for controlling the combustion process and improving engine performance.

  12. The Digital discrimination of neutron and ? ray using organic scintillation detector based on wavelet transform modulus maximum

    E-Print Network [OSTI]

    Yang yun; Liu guofu; Yang jun; Luo xiaoliang

    2013-04-17

    A novel algorithm for the discrimination of neutron and {\\gamma}-ray with wavelet transform modulus maximum (WTMM) in an organic scintillation has been investigated. Voltage pulses arising from a BC501A organic liquid scintillation detector in a mixed radiation field have been recorded with a fast digital sampling oscilloscope. The performances of most pulse shape discrimination methods in scintillation detection systems using time-domain features of the pulses are affected intensively by noise. However, the WTMM method using frequency-domain features exhibits a strong insensitivity to noise and can be used to discriminate neutron and {\\gamma}-ray events based on their different asymptotic decay trend between the positive modulus maximum curve and the negative modulus maximum curve in the scale-space plane. This technique has been verified by the corresponding mixed-field data assessed by the time-of-flight (TOF) method and the frequency gradient analysis (FGA) method. It is shown that the characterization of neutron and gamma achieved by the discrimination method based on WTMM is consistent with that afforded by TOF and better than FGA. Moreover, because the WTMM method is it self presented to eliminate the noise, there is no need to make any pretreatment for the pulses.

  13. Equations of State and Maximum Mass of Neutron Stars in Light of PSR J1614-2230

    E-Print Network [OSTI]

    Carlos Daniel Xu

    2012-10-31

    We shall examine various types of equations of state for neutron stars, which determine the structure of neutron stars. In particular, the relation between mass and radius of neutron stars is of primary consideration. By combining an equation of state (EOS) with the Tolmann-Oppenheimer-Volkoff structure equations, we can determine the theoretical maximum mass of a neutron star for a given equation of state. One question we seek to answer is whether quark matter can exist in the core of a neutron star. In light of the discovery of pulsar PSR J1614-2230, the mass of which is observed to be 1.97 solar masses, a valid equation of state must achieve a maximum mass that is greater than 2 solar masses. To try to solve this problem, we experiment with different sets of parameters for the quark matter to try to meet the lower limit 2-solar-mass criterion. It is found that certain parameters contribute significantly to the maximum mass of a neutron star.

  14. Achieving Software Quality with Testing Coverage Measures: Metrics, Tools, and Applications

    E-Print Network [OSTI]

    Lyu, Michael R.

    Achieving Software Quality with Testing Coverage Measures: Metrics, Tools, and Applications J. R of data flow testing, describes a software testing and analysis tool called ATAC, which measures the effectiveness of testing data, and presents two case studies connecting software quality with the control

  15. Dynamic remodelling of disordered protein aggregates is an alternative pathway to achieve robust

    E-Print Network [OSTI]

    Spakowitz, Andrew J.

    Dynamic remodelling of disordered protein aggregates is an alternative pathway to achieve robust interactions control clathrin assembly at short time scales resulting in either disordered protein aggregates off to form spherical cages around lipid vesicles. The clathrin then disassembles and recycles back

  16. Achievable performance of multivariable systems with unstable zeros and poles K. HAVRE{{ and S. SKOGESTAD{*

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Achievable performance of multivariable systems with unstable zeros and poles K. HAVRE{{ and S) zeros and poles in multivariable feedback systems. We generalize previously known controller depend on the plant G. The bounds are tight for cases with only one RHP-zero or pole. For plants with RHP

  17. Maximum Entropy Analysis of the Spectral Functions in Lattice QCD

    E-Print Network [OSTI]

    M. Asakawa; T. Hatsuda; Y. Nakahara

    2001-02-26

    First principle calculation of the QCD spectral functions (SPFs) based on the lattice QCD simulations is reviewed. Special emphasis is placed on the Bayesian inference theory and the Maximum Entropy Method (MEM), which is a useful tool to extract SPFs from the imaginary-time correlation functions numerically obtained by the Monte Carlo method. Three important aspects of MEM are (i) it does not require a priori assumptions or parametrizations of SPFs, (ii) for given data, a unique solution is obtained if it exists, and (iii) the statistical significance of the solution can be quantitatively analyzed. The ability of MEM is explicitly demonstrated by using mock data as well as lattice QCD data. When applied to lattice data, MEM correctly reproduces the low-energy resonances and shows the existence of high-energy continuum in hadronic correlation functions. This opens up various possibilities for studying hadronic properties in QCD beyond the conventional way of analyzing the lattice data. Future problems to be studied by MEM in lattice QCD are also summarized.

  18. Improved Maximum Entropy Method with an Extended Search Space

    E-Print Network [OSTI]

    Alexander Rothkopf

    2012-08-25

    We report on an improvement to the implementation of the Maximum Entropy Method (MEM). It amounts to departing from the search space obtained through a singular value decomposition (SVD) of the Kernel. Based on the shape of the SVD basis functions we argue that the MEM spectrum for given $N_\\tau$ data-points $D(\\tau)$ and prior information $m(\\omega)$ does not in general lie in this $N_\\tau$ dimensional singular subspace. Systematically extending the search basis will eventually recover the full search space and the correct extremum. We illustrate this idea through a mock data analysis inspired by actual lattice spectra, to show where our improvement becomes essential for the success of the MEM. To remedy the shortcomings of Bryan's SVD prescription we propose to use the real Fourier basis, which consists of trigonometric functions. Not only does our approach lead to more stable numerical behavior, as the SVD is not required for the determination of the basis functions, but also the resolution of the MEM becomes independent from the position of the reconstructed peaks.

  19. The Multi-Mission Maximum Likelihood framework (3ML)

    E-Print Network [OSTI]

    Vianello, Giacomo; Younk, Patrick; Tibaldo, Luigi; Burgess, James M; Ayala, Hugo; Harding, Patrick; Hui, Michelle; Omodei, Nicola; Zhou, Hao

    2015-01-01

    Astrophysical sources are now observed by many different instruments at different wavelengths, from radio to high-energy gamma-rays, with an unprecedented quality. Putting all these data together to form a coherent view, however, is a very difficult task. Each instrument has its own data format, software and analysis procedure, which are difficult to combine. It is for example very challenging to perform a broadband fit of the energy spectrum of the source. The Multi-Mission Maximum Likelihood framework (3ML) aims to solve this issue, providing a common framework which allows for a coherent modeling of sources using all the available data, independent of their origin. At the same time, thanks to its architecture based on plug-ins, 3ML uses the existing official software of each instrument for the corresponding data in a way which is transparent to the user. 3ML is based on the likelihood formalism, in which a model summarizing our knowledge about a particular region of the sky is convolved with the instrument...

  20. Maximum gravitational-wave energy emissible in magnetar flares

    E-Print Network [OSTI]

    Alessandra Corsi; Benjamin J. Owen

    2011-02-16

    Recent searches of gravitational-wave (GW) data raise the question of what maximum GW energies could be emitted during gamma-ray flares of highly magnetized neutron stars (magnetars). The highest energies (\\sim 10^{49} erg) predicted so far come from a model [K. Ioka, Mon. Not. Roy. Astron. Soc. 327, 639 (2001)] in which the internal magnetic field of a magnetar experiences a global reconfiguration, changing the hydromagnetic equilibrium structure of the star and tapping the gravitational potential energy without changing the magnetic potential energy. The largest energies in this model assume very special conditions, including a large change in moment of inertia (which was observed in at most one flare), a very high internal magnetic field, and a very soft equation of state. Here we show that energies of 10^{48}-10^{49} erg are possible under more generic conditions by tapping the magnetic energy, and we note that similar energies may also be available through cracking of exotic solid cores. Current observational limits on gravitational waves from magnetar fundamental modes are just reaching these energies and will beat them in the era of advanced interferometers.

  1. Best available control technology (BACT) equivalent for the control of volatile organic emissions from paint dipping operations

    SciTech Connect (OSTI)

    Blankenship, W.R.; Pugh, C.W. Jr.

    1999-07-01

    This paper provides details of a study conducted to demonstrate an equivalent method of Best Available Control Technology (BACT) compliance for volatile organic emissions from dip coating of certain miscellaneous metal parts. The study was proposed to show that the total volatile organic compound (VOC) emissions from 3.8 lb of VOC/gallon coating formulations were no greater than the total VOC emissions from 3.5 lb/gallon formulations used under the same conditions for coating steel joists. The presumptive BACT standard enforced by the Virginia Department of Environmental Quality (DEQ) for dip coating of steel joists is 3.5 lb/gallon. The requirement of 3.5 lb/gallon was derived from the US Environmental Protection Agency Guideline Series Control of Volatile Organic Emissions from Existing Stationary Sources--Volume 6: Surface Coating of Miscellaneous Metal Parts and Products. On June 5, 1998 the source completed a 12 month, full scale comparison study under a consent order with the Virginia DEQ. During the study period, the source made daily measurements of product produced, paint used, and emissions from the control and test paint tanks, and reported data to EPA and the DEQ every two months. The study concluded that a 26 percent reduction in paint usage and a 20 percent reduction in emissions was achieved in the test tanks using a 3.8 lb/gal coating compared to the control tanks using a 3.5 lb/gal coating. This study enables the source to achieve greater emission reductions than the presumptive BACT level and at the same time reduce painting costs by 34%. This study provides positive results for the environment, the steel joist industry, and the construction industry. This study could impact EPA's current Maximum Achievable Control Technology (MACT) rule development for Miscellaneous Metal Parts and Products and national VOC rules for this source category under Section 183(e) of the Clean Air Act.

  2. Ranking the dermatology programs based on measurements of academic achievement

    E-Print Network [OSTI]

    Wu, Jashin J; Ramirez, Claudia C; Alonso, Carol A; Berman, Brian; Tyring, Stephen K

    2007-01-01

    reflective of scholarly achievement: publications in 2001 toand publications are generally regarded as standard measuring sticks of scholarly

  3. Achieving Real-time Mode Estimation through Offline Compilation

    E-Print Network [OSTI]

    Achieving Real-time Mode Estimation through Offline Compilation by John M. Van Eepoel B, Committee on Graduate Students #12;Achieving Real-time Mode Estimation through Offline Compilation2 This page intentionally left blank. #12;Achieving Real-time Mode Estimation through Offline Compilation 3

  4. Evaluation of Control Strategies to Effectively Meet 70-90% Mercury Reduction on an Eastern Bituminous Coal Cyclone Boiler with SCR

    SciTech Connect (OSTI)

    Tom Campbell

    2008-12-31

    This is the final site report for testing conducted at Public Service of New Hampshire's (PSNH) Merrimack Unit 2 (MK2). This project was funded through the DOE/NETL Innovations for Existing Plants program. It was a Phase III project with the goal to develop mercury control technologies that can achieve 50-70% mercury capture at costs 25-50% less than baseline estimates of $50,000-$70,000/lb of mercury removed. While results from testing at Merrimack indicate that the DOE goal was partially achieved, further improvements in the process are recommended. Merrimack burned a test blend of eastern bituminous and Venezuelan coals, for a target coal sulfur content of 1.2%, in its 335-MW Unit 2. The blend ratio is approximately a 50/50 split between the two coals. Various sorbent injection tests were conducted on the flue gas stream either in front of the air preheater (APH) or in between the two in-series ESPs. Initial mercury control evaluations indicated that, without SO3 control, the sorbent concentration required to achieve 50% control would not be feasible, either economically or within constraints specific to the maximum reasonable particle loading to the ESP. Subsequently, with SO{sub 3} control via trona injection upstream of the APH, economically feasible mercury removal rates could be achieved with PAC injection, excepting balance-of-plant concerns. The results are summarized along with the impacts of the dual injection process on the air heater, ESP operation, and particulate emissions.

  5. 2011-07 "Maximum Utilization of WIPP by Increasing MDA G TRU...

    Office of Environmental Management (EM)

    7 "Maximum Utilization of WIPP by Increasing MDA G TRU Shipments" 2011-07 "Maximum Utilization of WIPP by Increasing MDA G TRU Shipments" The intent of this recommendation is to...

  6. Examining the Academic Achievement of Black Youth: The Roles of Social Influence, Achievement Values and Behavioral Engagement 

    E-Print Network [OSTI]

    Darensbourg, Alicia Marie

    2011-10-21

    examines a more complete construct of achievement values, along with behavioral engagement and the impact of these constructs on Black adolescents' academic achievement. Additionally, this study assessed who, peers or parents, has influence on the academic...

  7. Laboratory-Based Maximum Slip Rates in Earthquake Rupture Zones and Radiated Energy

    E-Print Network [OSTI]

    New Hampshire, University of

    Laboratory-Based Maximum Slip Rates in Earthquake Rupture Zones and Radiated Energy by A. McGarr, J. B. Fletcher, M. Boettcher, N. Beeler, and J. Boatwright Abstract Laboratory stick-slip friction and the maximum slip rate. From laboratory results, the maximum slip rate for any crustal earthquake, as well

  8. Voltage/Pitch Control for Maximization and Regulation of Active/Reactive Powers in Wind Turbines with Uncertainties

    E-Print Network [OSTI]

    Guo, Yi; Jiang, John N; Tang, Choon Yik; Ramakumar, Rama G

    2010-01-01

    This paper addresses the problem of controlling a variable-speed wind turbine with a Doubly Fed Induction Generator (DFIG), modeled as an electromechanically-coupled nonlinear system with rotor voltages and blade pitch angle as its inputs, active and reactive powers as its outputs, and most of the aerodynamic and mechanical parameters as its uncertainties. Using a blend of linear and nonlinear control strategies (including feedback linearization, pole placement, uncertainty estimation, and gradient-based potential function minimization) as well as time-scale separation in the dynamics, we develop a controller that is capable of maximizing the active power in the Maximum Power Tracking (MPT) mode, regulating the active power in the Power Regulation (PR) mode, seamlessly switching between the two modes, and simultaneously adjusting the reactive power to achieve a desired power factor. The controller consists of four cascaded components, uses realistic feedback signals, and operates without knowledge of the C_p-...

  9. SPEC application for achieving inelastic X-ray scattering experiment in the SSRF

    E-Print Network [OSTI]

    Lan, Xuying; Liang, Dongxu; Yan, Shuai; Mao, Chengwen; Li, Aiguo; Wang, Jie

    2015-01-01

    In order to carry out inelastic X-ray scattering (IXS) experiment at BL15U1 beamline of Shanghai Synchrotron Radiation Facility (SSRF), the data acquisition and control system based on SPEC software has been developed. The IXS experimental method needs linkage control of monochromator, silicon drift detector (SDD) and ionization chamber on continuous segment-scan mode with variable step size, and gains the data of energy, spectrum and light intensity synchronously. A method is presented for achieving this function which was not realized only by using SSCAN of Experimental Physics and Industrial Control System (EPICS). This paper shows work details including control system description, SPEC configurations for EPICS devices, macro definitions and applications in the BL15U1. An IXS experiment was executed by using the SPEC control system, its results prove that the method is feasible to perform the experiment.

  10. A Stochastic Maximum Principle for a Stochastic Differential Game of a Mean-Field Type

    SciTech Connect (OSTI)

    Hosking, John Joseph Absalom, E-mail: j.j.a.hosking@cma.uio.no [University of Oslo, Centre of Mathematics for Applications (CMA) (Norway)

    2012-12-15

    We construct a stochastic maximum principle (SMP) which provides necessary conditions for the existence of Nash equilibria in a certain form of N-agent stochastic differential game (SDG) of a mean-field type. The information structure considered for the SDG is of a possible asymmetric and partial type. To prove our SMP we take an approach based on spike-variations and adjoint representation techniques, analogous to that of S. Peng (SIAM J. Control Optim. 28(4):966-979, 1990) in the optimal stochastic control context. In our proof we apply adjoint representation procedures at three points. The first-order adjoint processes are defined as solutions to certain mean-field backward stochastic differential equations, and second-order adjoint processes of a first type are defined as solutions to certain backward stochastic differential equations. Second-order adjoint processes of a second type are defined as solutions of certain backward stochastic equations of a type that we introduce in this paper, and which we term conditional mean-field backward stochastic differential equations. From the resulting representations, we show that the terms relating to these second-order adjoint processes of the second type are of an order such that they do not appear in our final SMP equations. A comparable situation exists in an article by R. Buckdahn, B. Djehiche, and J. Li (Appl. Math. Optim. 64(2):197-216, 2011) that constructs a SMP for a mean-field type optimal stochastic control problem; however, the approach we take of using these second-order adjoint processes of a second type to deal with the type of terms that we refer to as the second form of quadratic-type terms represents an alternative to a development, to our setting, of the approach used in their article for their analogous type of term.

  11. Multilevel Factor Analysis of Class and Student Achievement Components

    E-Print Network [OSTI]

    Bengt O. Muthén

    2011-01-01

    Multilevel Factor Analysis of Class and Student AchievementMultilevel Factor Analysis of Class and Student Achievementof students observed within classes, classes within schools,

  12. Largest Producer of Steel Products in the United States Achieves...

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

    large capital costs and demonstrated the value of similar measures. * By upgrading burners in a kiln serving an important process line, the Minntac plant achieved significant...

  13. Combined Heat and Power System Achieves Millions in Cost Savings...

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

    campus, which includes 750 buildings. Photo courtesy of Texas A&M University Combined Heat and Power System Achieves Millions in Cost Savings at Large University Recovery Act...

  14. NREL Staff Recognized by DOE for Outstanding Achievements | Awards...

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

    areas. This year, the Hydrogen and Fuel Cells Program honored four National Renewable Energy Laboratory (NREL) staff for their outstanding achievements. See the full list of...

  15. NERSC Announces 2nd Annual HPC Achievement Awards

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

    Computing Center (NERSC) announced the winners of its second annual High Performance Computing (HPC) Achievement Awards on Feb. 4, 2014, during the annual NERSC User Group...

  16. Microsoft PowerPoint - Chairs - Topics and Achievements (FINAL...

    Energy Savers [EERE]

    EM 2 Hanford Advisory Board Achievements : * With the decommissioning of the Plutonium Finishing Plant's "McCluskey Room," the Hanford Nuclear Reservation has added a...

  17. How is the balance between protein synthesis and degradation achieved?

    E-Print Network [OSTI]

    Rothman, Stephen

    2010-01-01

    as: Rothman, How is the balance between protein synthesisAccess Research How is the balance between protein synthesisstate concentrations. Balance between them is achieved

  18. New World Record Achieved in Solar Cell Technology | Department...

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

    a concentrator solar cell produced by Boeing-Spectrolab has recently achieved a world-record conversion efficiency of 40.7 percent, establishing a new milestone in...

  19. Intercropped silviculture systems, a key to achieving soil fungal...

    Office of Scientific and Technical Information (OSTI)

    Intercropped silviculture systems, a key to achieving soil fungal community management in eucalyptus plantations Citation Details In-Document Search Title: Intercropped...

  20. Volvo Trucks Achieves Lofty Energy and Carbon Goals

    SciTech Connect (OSTI)

    2011-03-31

    Case study - Volvo's New River Valley facility leveraged company and ITP resources to achieve plant-wide targets that surpass both corporate and Save Energy Now goals.

  1. Pantex Plant Achieves Key Safety Milestone Ahead of Schedule...

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

    Achieves Key Safety Milestone Ahead of Schedule | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing...

  2. Computer Control of Boiler Operation 

    E-Print Network [OSTI]

    Pareja, G. E.

    1981-01-01

    efficiency has increased over 11%. The control system includes; air flow, fuel flow, pressure and drum level control. Air flow control is achieved through modulation of the F.D. fan inlet vanes. Demand for airflow is produced from a high signal selection...

  3. Potential Impact of Adopting Maximum Technologies as Minimum Efficiency Performance Standards in the U.S. Residential Sector

    SciTech Connect (OSTI)

    Letschert, Virginie; Desroches, Louis-Benoit; McNeil, Michael; Saheb, Yamina

    2010-05-03

    The US Department of Energy (US DOE) has placed lighting and appliance standards at a very high priority of the U.S. energy policy. However, the maximum energy savings and CO2 emissions reduction achievable via minimum efficiency performance standards (MEPS) has not yet been fully characterized. The Bottom Up Energy Analysis System (BUENAS), first developed in 2007, is a global, generic, and modular tool designed to provide policy makers with estimates of potential impacts resulting from MEPS for a variety of products, at the international and/or regional level. Using the BUENAS framework, we estimated potential national energy savings and CO2 emissions mitigation in the US residential sector that would result from the most aggressive policy foreseeable: standards effective in 2014 set at the current maximum technology (Max Tech) available on the market. This represents the most likely characterization of what can be maximally achieved through MEPS in the US. The authors rely on the latest Technical Support Documents and Analytical Tools published by the U.S. Department of Energy as a source to determine appliance stock turnover and projected efficiency scenarios of what would occur in the absence of policy. In our analysis, national impacts are determined for the following end uses: lighting, television, refrigerator-freezers, central air conditioning, room air conditioning, residential furnaces, and water heating. The analyzed end uses cover approximately 65percent of site energy consumption in the residential sector (50percent of the electricity consumption and 80percent of the natural gas and LPG consumption). This paper uses this BUENAS methodology to calculate that energy savings from Max Tech for the U.S. residential sector products covered in this paper will reach an 18percent reduction in electricity demand compared to the base case and 11percent in Natural Gas and LPG consumption by 2030 The methodology results in reductions in CO2 emissions of a similar magnitude.

  4. Application of asymptotic expansions for maximum likelihood estimators errors to gravitational waves from binary mergers: The single interferometer case

    SciTech Connect (OSTI)

    Zanolin, M.; Vitale, S.; Makris, N.

    2010-06-15

    In this paper we apply to gravitational waves (GW) from the inspiral phase of binary systems a recently derived frequentist methodology to calculate analytically the error for a maximum likelihood estimate of physical parameters. We use expansions of the covariance and the bias of a maximum likelihood estimate in terms of inverse powers of the signal-to-noise ration (SNR)s where the square root of the first order in the covariance expansion is the Cramer Rao lower bound (CRLB). We evaluate the expansions, for the first time, for GW signals in noises of GW interferometers. The examples are limited to a single, optimally oriented, interferometer. We also compare the error estimates using the first two orders of the expansions with existing numerical Monte Carlo simulations. The first two orders of the covariance allow us to get error predictions closer to what is observed in numerical simulations than the CRLB. The methodology also predicts a necessary SNR to approximate the error with the CRLB and provides new insight on the relationship between waveform properties, SNR, dimension of the parameter space and estimation errors. For example the timing match filtering can achieve the CRLB only if the SNR is larger than the Kurtosis of the gravitational wave spectrum and the necessary SNR is much larger if other physical parameters are also unknown.

  5. Achievable safety of driverless ground vehicles Rodrigo Benenson

    E-Print Network [OSTI]

    Boyer, Edmond

    , France michel.parent@inria.fr Abstract--Safety is an important issue of driverless car. Yet, most currentAchievable safety of driverless ground vehicles Rodrigo Benenson INRIA Rocquencourt / Mines Paris guarantees can be given and how to achieve them. I. INTRODUCTION Driverless cars are an interesting robotics

  6. A Statistical Approach for Achievable Dose Querying in IMRT Planning

    E-Print Network [OSTI]

    Kazhdan, Michael

    Introduction We explore a data-driven approach for achievable dose querying in intensity- modulated radiation specifies too low a target dose to the OAR, the treatment plan may not be realiz- able and the treatmentA Statistical Approach for Achievable Dose Querying in IMRT Planning Patricio Simari1 , Binbin Wu2

  7. Speed Control in Industrial Refrigeration: Theory, Application & Case Studies 

    E-Print Network [OSTI]

    Wilcox, M. H.

    1995-01-01

    -pressure regulators (BPRs) or liquid solenoids, and condensers cycle fans. Unfortunately, these control methods do not provide the maximum attainable reduction in brake horsepower (BHP) as refrigeration capacity is reduced. This paper will discuss... theory and case study, speed control of these components provides maximum flexibility, control and energy efficiency. SPEED CONTROL BACKGROUND In standard system design, electric motors are intended to operate at a fixed speed. This speed...

  8. Maximum allowable hydraulic ram force for heel jet removal Tank 241-C-106

    SciTech Connect (OSTI)

    PAULSEN, S.S.

    2003-01-10

    This document contains an evaluation of the maximum force that can be used to actuate the hydraulic ram assembly without causing permanent damage to the riser or pit.

  9. Automotive Power Generation and Control

    E-Print Network [OSTI]

    Caliskan, Vahe

    This paper describes some new developments in the application of power electronics to automotive power generation and control. A new load-matching technique is introduced that uses a simple switched-mode rectifier to achieve ...

  10. Controls for Solid-State Lighting

    SciTech Connect (OSTI)

    Rubinstein, Francis

    2007-06-22

    This study predicts new hybrid lighting applications for LEDs. In hybrid lighting, LEDs provide a low-energy 'standby' light level while another, more powerful, efficient light source provides light for occupied periods. Lighting controls will allow the two light sources to work together through an appropriate control strategy, typically motion-sensing. There are no technical barriers preventing the use of low through high CRI LEDs for standby lighting in many interior and exterior applications today. The total luminous efficacy of LED systems could be raised by increasing the electrical efficiency of LED drivers to the maximum practically achievable level (94%). This would increase system luminous efficacy by 20-25%. The expected market volumes for many types of LEDs should justify the evolution of new LED drivers that use highly efficient ICs and reduce parts count by means of ASICs. Reducing their electronics parts count by offloading discrete components onto integrated circuits (IC) will allow manufacturers to reduce the cost of LED driver electronics. LED luminaire manufacturers will increasingly integrate the LED driver and thermal management directly in the LED fixture. LED luminaires of the future will likely have no need for separable lamp and ballast because the equipment life of all the LED luminaire components will all be about the same (50,000 hours). The controls and communications techniques used for communicating with conventional light sources, such as dimmable fluorescent lighting, are appropriate for LED illumination for energy management purposes. DALI has been used to control LED systems in new applications and the emerging ZigBee protocol could be used for LEDs as well. Major lighting companies are already moving in this direction. The most significant finding is that there is a significant opportunity to use LEDs today for standby lighting purposes. Conventional lighting systems can be made more efficient still by using LEDs to provide a low-energy standby state when lower light levels are acceptable.

  11. Quantum Optimal Control Theory

    E-Print Network [OSTI]

    J. Werschnik; E. K. U. Gross

    2007-07-12

    The control of quantum dynamics via specially tailored laser pulses is a long-standing goal in physics and chemistry. Partly, this dream has come true, as sophisticated pulse shaping experiments allow to coherently control product ratios of chemical reactions. The theoretical design of the laser pulse to transfer an initial state to a given final state can be achieved with the help of quantum optimal control theory (QOCT). This tutorial provides an introduction to QOCT. It shows how the control equations defining such an optimal pulse follow from the variation of a properly defined functional. We explain the most successful schemes to solve these control equations and show how to incorporate additional constraints in the pulse design. The algorithms are then applied to simple quantum systems and the obtained pulses are analyzed. Besides the traditional final-time control methods, the tutorial also presents an algorithm and an example to handle time-dependent control targets.

  12. Tsallis distribution as a standard maximum entropy solution with `tail' constraint

    E-Print Network [OSTI]

    Bercher, Jean-François

    Tsallis distribution as a standard maximum entropy solution with `tail' constraint J.-F. Bercher 1 that Tsallis' distributions can be derived from the standard (Shannon) maximum entropy setting, by incorporating a con- straint on the divergence between the distribution and another distribution imagined as its

  13. MAXIMUM POWER ESTIMATION OF LITHIUM-ION BATTERIES ACCOUNTING FOR THERMAL AND ELECTRICAL CONSTRAINTS

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    MAXIMUM POWER ESTIMATION OF LITHIUM-ION BATTERIES ACCOUNTING FOR THERMAL AND ELECTRICAL CONSTRAINTS on the maximum deliverable power is essential to protect lithium-ion batteries from over- charge Terminal voltage Voc Open circuit voltage of a battery 1 INTRODUCTION Lithium-ion batteries have been used

  14. Maximum Power Transfer Tracking in a Solar USB Charger for Smartphones

    E-Print Network [OSTI]

    Pedram, Massoud

    Maximum Power Transfer Tracking in a Solar USB Charger for Smartphones Abstract--Battery life of commercial chargers using solar power have been developed. They focus on correct functionality, but system chargers do not perform the maximum power point tracking [2], [3] of the solar panel. We exclude

  15. Maximum Weight Matching Dispatching Scheme in Buffered Clos-Network Packet Switches

    E-Print Network [OSTI]

    Chao, Jonathan

    Maximum Weight Matching Dispatching Scheme in Buffered Clos-Network Packet Switches Roberto Rojas of Clos-network switches make them an alternative to single-stages switches for implementing large- size packet switches. This paper introduces a cell dispatching scheme, called maximum weight matching

  16. Analysis and Optimization of Maximum Power Point Tracking Algorithms in the Presence of

    E-Print Network [OSTI]

    Odam, Kofi

    characteristic. This perturbation reduces the power obtained from the solar panel because the panel is no longerAnalysis and Optimization of Maximum Power Point Tracking Algorithms in the Presence of Noise maximum power point tracking (MPPT) algorithms for photovoltaic systems. Noise is an essential

  17. GEOMAGNETIC EFFECTS OF INTERPLANETARY SHOCK WAVES DURING SOLAR MINIMUM (1995-1996) AND SOLAR MAXIMUM (2000)

    E-Print Network [OSTI]

    2000-01-01

    GEOMAGNETIC EFFECTS OF INTERPLANETARY SHOCK WAVES DURING SOLAR MINIMUM (1995-1996) AND SOLAR during solar minimum (1995-1996) and solar maximum (2000) periods are obtained. It is observed that solar significant correlations during both solar maximum and solar minimum. The dynamic pressure variation, however

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

    E-Print Network [OSTI]

    California at Berkeley, University of

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

  19. Carbon monoxide (CO) maximum over the Zagros mountains in the Middle East: Signature of mountain venting?

    E-Print Network [OSTI]

    Jones, Dylan

    Carbon monoxide (CO) maximum over the Zagros mountains in the Middle East: Signature of mountain- posphere (MOPITT) satellite instrument. Enhanced CO is observed over the Zagros mountains of Iran), Carbon monoxide (CO) maximum over the Zagros mountains in the Middle East: Signature of mountain venting

  20. Achieving Deeper Energy Savings in Federal Energy Performance Contracts

    SciTech Connect (OSTI)

    Shonder, John A

    2015-01-01

    Legislation requires each agency of the US federal government to reduce the aggregate energy use index of its buildings by 30% by 2015, with respect to a 2003 baseline. The declining availability of appropriated funding means that energy performance contracting will be key to achieving this goal. Historically however, energy performance contracts have been able to reduce energy use by only about 20% over baseline. Achieving 30% energy reductions using performance contracting will require new approaches and a specific focus on achieving higher energy savings, both by ESCOs and by agencies. This paper describes some of the ways federal agencies are meeting this challenge, and presents results from the efforts of one agency the US General Services Administration -- to achieve deeper energy savings in conventional energy savings performance contracts.

  1. Jefferson Lab News - Jefferson Lab Achieves Critical Milestone...

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

    Achieves Critical Milestone Toward Construction of 310-Million Upgrade Project Pion This architectural rendering shows the Hall D complex to be built as part of the CEBAF 12 GeV...

  2. Savannah River Site Contractor Achieves Tank Waste Milestone

    Broader source: Energy.gov [DOE]

    AIKEN, S.C. – The Savannah River Site’s liquid waste contractor recently achieved a contract milestone by processing 500,000 gallons of salt waste in underground tanks for disposition since October last year.

  3. Microsoft Word - Barriers to Achieving the Modern Grid_Final...

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

    our 21 st Century Economy V1.0 Barriers to Achieving the Modern Grid A declining infusion of new thought is occurring. The technical experience base of utilities is graying....

  4. Scientific Achievement Networks of highly photoresponsive crystalline GaSe

    E-Print Network [OSTI]

    Geohegan, David B.

    Scientific Achievement Networks of highly photoresponsive crystalline GaSe nanosheets a crystalline GaSe target was adjusted to directly grow networks of interconnected triangular GaSe crystalline nanosheets of ~ 200 nm size (inset shows atomic

  5. The effect of teacher certification on student achievement 

    E-Print Network [OSTI]

    Sparks, Karin

    2005-08-29

    The purpose of this study was to review the empirical research evidence on the effect of teacher certification on student achievement. An exploratory meta-analysis was conducted on studies that examined the effect of fully certified and less...

  6. Achieving Superior Plant Energy Performance Utilizing Real-time Data 

    E-Print Network [OSTI]

    Subramanya, S.

    2010-01-01

    . With the right Best Practices, however, using new methodologies and technologies unavailable only a few years ago, enterprises can achieve dramatic energy reductions and their resulting cost savings. These Best Practices are founded on 1) application of a...

  7. Analyticity, Convergence and Convergence Rate of Recursive Maximum Likelihood Estimation in Hidden Markov Models

    E-Print Network [OSTI]

    Tadi?, Vladislav B

    2009-01-01

    This paper considers the asymptotic properties of the recursive maximum likelihood estimation in hidden Markov models. The paper is focused on the asymptotic behavior of the log-likelihood function and on the point-convergence and convergence rate of the recursive maximum likelihood estimator. Using the principle of analytical continuation, the analyticity of the asymptotic log-likelihood function is shown for analytically parameterized hidden Markov models. Relying on this fact and some results from differential geometry (Lojasiewicz inequality), the almost sure point-convergence of the recursive maximum likelihood algorithm is demonstrated, and relatively tight bounds on the convergence rate are derived. As opposed to the existing result on the asymptotic behavior of maximum likelihood estimation in hidden Markov models, the results of this paper are obtained without assuming that the log-likelihood function has an isolated maximum at which the Hessian is strictly negative definite.

  8. Achieving Robustness to Uncertainty for Financial Decision-making

    SciTech Connect (OSTI)

    Barnum, George M.; Van Buren, Kendra L.; Hemez, Francois M.; Song, Peter

    2014-01-10

    This report investigates the concept of robustness analysis to support financial decision-making. Financial models, that forecast future stock returns or market conditions, depend on assumptions that might be unwarranted and variables that might exhibit large fluctuations from their last-known values. The analysis of robustness explores these sources of uncertainty, and recommends model settings such that the forecasts used for decision-making are as insensitive as possible to the uncertainty. A proof-of-concept is presented with the Capital Asset Pricing Model. The robustness of model predictions is assessed using info-gap decision theory. Info-gaps are models of uncertainty that express the “distance,” or gap of information, between what is known and what needs to be known in order to support the decision. The analysis yields a description of worst-case stock returns as a function of increasing gaps in our knowledge. The analyst can then decide on the best course of action by trading-off worst-case performance with “risk”, which is how much uncertainty they think needs to be accommodated in the future. The report also discusses the Graphical User Interface, developed using the MATLAB® programming environment, such that the user can control the analysis through an easy-to-navigate interface. Three directions of future work are identified to enhance the present software. First, the code should be re-written using the Python scientific programming software. This change will achieve greater cross-platform compatibility, better portability, allow for a more professional appearance, and render it independent from a commercial license, which MATLAB® requires. Second, a capability should be developed to allow users to quickly implement and analyze their own models. This will facilitate application of the software to the evaluation of proprietary financial models. The third enhancement proposed is to add the ability to evaluate multiple models simultaneously. When two models reflect past data with similar accuracy, the more robust of the two is preferable for decision-making because its predictions are, by definition, less sensitive to the uncertainty.

  9. Optimization of Signal Processing Software for Control System Implementation

    E-Print Network [OSTI]

    Bhattacharyya, Shuvra S.

    Optimization of Signal Processing Software for Control System Implementation Shuvra S for design and optimization of signal processing software are important in achieving efficient controller that techniques developed for optimizing DSP software apply equally well to controller software. However

  10. Helping people 2 Johnson Controls September 18, 2013

    E-Print Network [OSTI]

    Subramanian, Venkat

    Building Automation & Controls Fire & Security Portfolio Management Technology Integration Energy Retrofits, refrigeration and controls products and services Building Management Systems Service, Repair & MaintenanceBuilding Efficiency Helping people achieve #12;2 Johnson Controls September 18, 2013 Building

  11. Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office

    E-Print Network [OSTI]

    Rubinstein, Francis

    2010-01-01

    continuous rows, a lighting power density (LPD) of 0.83W/ftThis results in a lighting power density (LPD)of 0.83 wattsfixture (ft 2 ) Lighting power density (W/ft 2 ) Hours per

  12. Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office

    E-Print Network [OSTI]

    Rubinstein, Francis

    2010-01-01

    Daily energy density in watt-hours per square foot per daya daily energy use of 13.25 watt-hours per square foot perenergy use is approximately 0.15 watt-hours per square foot

  13. Achieving atomic resolution magnetic dichroism by controlling the phase symmetry of an electron probe

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

    Rusz, Jan; Idrobo, Juan -Carlos; Bhowmick, Somnath

    2014-09-30

    The calculations presented here reveal that an electron probe carrying orbital angular momentum is just a particular case of a wider class of electron beams that can be used to measure electron magnetic circular dichroism (EMCD) with atomic resolution. It is possible to obtain an EMCD signal with atomic resolution by simply breaking the symmetry of the electron probe phase front using the aberration-corrected optics of an scanning transmission electron microscope. The phase distribution of the probe depends on the magnetic symmetry and crystal structure of the sample. The calculations indicate that EMCD signals utilizing the phase of the electronmore »probe are as strong as those obtained by nanodiffraction methods.« less

  14. Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office

    E-Print Network [OSTI]

    Rubinstein, Francis

    2010-01-01

    save energy and create a positive luminous environment insave energy and create a positive luminous environment interms of energy efficiency and providing luminous conditions

  15. Achieving Record Efficiency for Blue OLEDs by Controlling the Charge Balance

    Broader source: Energy.gov [DOE]

    Researchers at the University of Florida (UF) have demonstrated a blue phosphorescent organic light-emitting diode (OLED) with a peak power efficiency of 50 lm/W and an external quantum efficiency exceeding 20 percent at a luminance of 1,000 cd/m2, using no external light extraction techniques. This accomplishment is believed to be the world record in blue OLED efficiency.

  16. ALLIANCE: An Architecture for Fault Tolerant, Cooperative Control of Heterogeneous Mobile Robots

    E-Print Network [OSTI]

    Parker, Lynne E.

    ALLIANCE: An Architecture for Fault Tolerant, Cooperative Control of Heterogeneous Mobile Robots ALLIANCE, that utilizes adaptive action selection to achieve fault toler- ant cooperative control in robot demonstration. These experiments illustrate the ability of ALLIANCE to achieve adaptive, fault

  17. Spatial and Quantitative Approach to Incorporating Stakeholder Values into Total Maximum Daily Loads: Dominguez Channel Case Study

    SciTech Connect (OSTI)

    Stewart, J S; Baginski, T A; Greene, K G; Smith, A; Sicherman, A

    2006-06-23

    The Federal Clean Water Act (CWA) Section 303(d)(1)(A) requires each state to identify those waters that are not achieving water quality standards. The result of this assessment is called the 303(d) list. The CWA also requires states to develop and implement Total Maximum Daily Loads (TMDLs) for these waters on the 303(d) list. A TMDL specifies the maximum amount of a pollutant that a water body can receive and still meet water quality standards, and allocates the pollutant loadings to point and non-point sources. Nationwide, over 34,900 segments of waterways have been listed as impaired by the Environmental Protection Agency (EPA 2006). The EPA enlists state agencies and local communities to submit TMDL plans to reduce discharges by specified dates or have them developed by the EPA. The Department of Energy requested Lawrence Livermore National Laboratory (LLNL) to develop appropriate tools to assist in improving the TMDL process. An investigation of this process by LLNL found that plans to reduce discharges were being developed based on a wide range of site investigation methods. Our investigation found that given the resources available to the interested and responsible parties, developing a quantitative stakeholder input process and using visualization tools to display quantitative information could improve the acceptability of TMDL plans. We developed a stakeholder allocation model (SAM) which uses multi-attribute utility theory to quantitatively structure the preferences of the major stakeholder groups. We then applied GIS to display allocation options in maps representing economic activity, community groups, and city agencies. This allows allocation options and stakeholder concerns to be represented in both space and time. The primary goal of this tool is to provide a quantitative and visual display of stakeholder concerns over possible TMDL options.

  18. What is Security? A perspective on achieving security

    SciTech Connect (OSTI)

    Atencio, Julian J.

    2014-05-05

    This presentation provides a perspective on achieving security in an organization. It touches upon security as a mindset, ability to adhere to rules, cultivating awareness of the reason for a security mindset, the quality of a security program, willingness to admit fault or acknowledge failure, peer review in security, science as a model that can be applied to the security profession, the security vision, security partnering, staleness in the security program, security responsibilities, and achievement of success over time despite the impossibility of perfection.

  19. MA 222 - Exam 3 Statistics (scores are out of 100 points maximum ...

    E-Print Network [OSTI]

    2012-12-04

    Statistics (scores are out of 100 points maximum): Section. 031. 061. # Entered. 30. 29. Average. 64.46 60.55. Max. 94. 91. Min. 39. 21. Standard Deviation 15.3.

  20. MA 222 - Exam 1 Statistics (scores are out of 100 points maximum ...

    E-Print Network [OSTI]

    2012-09-26

    Statistics (scores are out of 100 points maximum): Section. 031. 061. # Entered. 30. 34. Average. 64.47 66.74. Max. 99. 94. Min. 18. 14. Standard Deviation 19.65

  1. Tropical climate variability from the last glacial maximum to the present

    E-Print Network [OSTI]

    Dahl, Kristina Ariel

    2005-01-01

    This thesis evaluates the nature and magnitude of tropical climate variability from the Last Glacial Maximum to the present. The temporal variability of two specific tropical climate phenomena is examined. The first is the ...

  2. Computation of the maximum loadability of a power system using nonlinear optimization 

    E-Print Network [OSTI]

    Khabirov, Abdufarrukh

    2001-01-01

    In recent years, power systems have undergone radical changes by becoming deregulated. Many electric companies have met new requirements and found ways to keep up with the changes in power systems. Issues of transfer capability and maximum...

  3. Submodule Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

    E-Print Network [OSTI]

    Pilawa-Podgurski, Robert C. N.

    This paper explores the benefits of distributed power electronics in solar photovoltaic applications through the use of submodule integrated maximum power point trackers (MPPT). We propose a system architecture that provides ...

  4. Atlantic Ocean circulation at the last glacial maximum : inferences from data and models

    E-Print Network [OSTI]

    Dail, Holly Janine

    2012-01-01

    This thesis focuses on ocean circulation and atmospheric forcing in the Atlantic Ocean at the Last Glacial Maximum (LGM, 18-21 thousand years before present). Relative to the pre-industrial climate, LGM atmospheric CO? ...

  5. Maximum a Posteriori Models for Cortical Modeling: Feature Detectors, Topography and Modularity

    E-Print Network [OSTI]

    Weber, Cornelius

    Maximum a Posteriori Models for Cortical Modeling: Feature Detectors, Topography and Modularity Modeling: Feature Detectors, Topography and Modularity PhD Thesis by Cornelius Weber, Berlin, July 31, 2000

  6. Models for estimating saturation flow and maximum demand at closely spaced intersections 

    E-Print Network [OSTI]

    Nanduri, Sreelata

    1995-01-01

    This thesis describes models for saturation flow and maximum demand at closely spaced intersections. The effects of queue interaction between these two intersections are taken into account in both models. The saturation flow model is based...

  7. Author's personal copy Unified behaviour of maximum soot yields of methane, ethane and propane

    E-Print Network [OSTI]

    Gülder, Ömer L.

    Author's personal copy Unified behaviour of maximum soot yields of methane, ethane and propane the current study and the previous measurements in similar flames with methane, ethane, and propane flames

  8. What if CLIQUE were fast? Maximum Cliques in Information Networks and Strong Components in Temporal Networks

    E-Print Network [OSTI]

    Rossi, Ryan A; Gebremedhin, Assefaw H; Patwary, Md Mostofa Ali

    2012-01-01

    Exact maximum clique finders have progressed to the point where we can investigate cliques in million-node social and information networks, as well as find strongly connected components in temporal networks. We use one such finder to study a large collection of modern networks emanating from biological, social, and technological domains. We show inter-relationships between maximum cliques and several other common network properties, including network density, maximum core, and number of triangles. In temporal networks, we find that the largest temporal strong components have around 20-30% of the vertices of the entire network. These components represent groups of highly communicative individuals. In addition, we discuss and improve the performance and utility of the maximum clique finder itself.

  9. Maximum Likelihood Estimation for the Proportional Odds Model with Random Effects

    E-Print Network [OSTI]

    Zeng, Donglin

    Maximum Likelihood Estimation for the Proportional Odds Model with Random Effects DONGLIN ZENG, D. Y. LIN, and GUOSHENG YIN In this article, we study the semiparametric proportional odds model; Frailty model; Linear transformation model; Proportional hazards; Semiparametric efficiency; Survival data

  10. A Maximum Likelihood Method with Penalty to Estimate Link Travel Time Based on Trip Itinerary Data 

    E-Print Network [OSTI]

    Zhong, Chujun

    2014-12-15

    Travel time is an important network performance measure. It is a challenging subject due to the fluctuations in traffic characteristics, such as traffic flow. This study proposes a maximum likelihood method with penalty ...

  11. A real-time laser feedback control method for the three-wave laser source used in the polarimeter-interferometer diagnostic on Joint-TEXT tokamak

    SciTech Connect (OSTI)

    Xiong, C. Y.; Chen, J. Li, Q.; Liu, Y.; Gao, L.

    2014-12-15

    A three-wave laser polarimeter-interferometer, equipped with three independent far-infrared laser sources, has been developed on Joint-TEXT (J-TEXT) tokamak. The diagnostic system is capable of high-resolution temporal and phase measurement of the Faraday angle and line-integrated density. However, for long-term operation (>10 min), the free-running lasers can lead to large drifts of the intermediate frequencies (?100–?500 kHz/10 min) and decay of laser power (?10%–?20%/10 min), which act to degrade diagnostic performance. In addition, these effects lead to increased maintenance cost and limit measurement applicability to long pulse/steady state experiments. To solve this problem, a real-time feedback control method of the laser source is proposed. By accurately controlling the length of each laser cavity, both the intermediate frequencies and laser power can be simultaneously controlled: the intermediate frequencies are controlled according to the pre-set values, while the laser powers are maintained at an optimal level. Based on this approach, a real-time feedback control system has been developed and applied on J-TEXT polarimeter-interferometer. Long-term (theoretically no time limit) feedback of intermediate frequencies (maximum change less than ±12 kHz) and laser powers (maximum relative power change less than ±7%) has been successfully achieved.

  12. Measure Guideline: Condensing Boilers - Control Strategies for Optimizing Performance and Comfort in Residential Applications

    SciTech Connect (OSTI)

    Arena, L.

    2013-05-01

    The combination of a gas-fired condensing boiler with baseboard convectors and an indirect water heater has become a common option for high-efficiency residential space heating in cold climates. While there are many condensing boilers available on the market with rated efficiencies in the low to mid 90% efficient range, it is imperative to understand that if the control systems are not properly configured, these heaters will perform no better than their non-condensing counterparts. Based on previous research efforts, it is apparent that these types of systems are typically not designed and installed to achieve maximum efficiency (Arena 2010). It was found that there is a significant lack of information for contractors on how to configure the control systems to optimize overall efficiency. For example, there is little advice on selecting the best settings for the boiler reset curve or how to measure and set flow rates in the system to ensure that the return temperatures are low enough to promote condensing. It has also been observed that recovery from setback can be extremely slow and, at times, not achieved. Recovery can be affected by the outdoor reset control, the differential setting on the boiler and over-sizing of the boiler itself. This guide is intended for designers and installers of hydronic heating systems interested in maximizing the overall system efficiency of condensing boilers when coupled with baseboard convectors. It is applicable to new and retrofit applications.

  13. Optimal filter design approaches to statistical process control for autocorrelated processes 

    E-Print Network [OSTI]

    Chin, Chang-Ho

    2005-11-01

    Statistical Process Control (SPC), and in particular control charting, is widely used to achieve and maintain control of various processes in manufacturing. A control chart is a graphical display that plots quality characteristics versus the sample...

  14. Achievements and Outlook 2012 SA Water Centre for Water

    E-Print Network [OSTI]

    Mayer, Wolfgang

    Achievements and Outlook 2012 SA Water Centre for Water Management and Reuse #12;Contents Our Breaking News 35 SA Water Centre for Water Management and Reuse University of South Australia Mawson Lakes Campus Mawson Lakes SA 5095 Telephone: +61 (08) 8302 3338 Fax: +61 (08) 8302 3386 Web: unisa.edu.au/water

  15. Achieving 70% Clean Energy by 2030 in Hawai'i

    Office of Energy Efficiency and Renewable Energy (EERE)

    In 2008, the state of Hawai’i, in partnership with the U.S. Department of Energy (DOE), launched the Hawai’i Clean Energy Initiative (HCEI) to reduce its dependence on imported fossil fuels, HCEI brings together business leaders, policymakers, and citizens to meet its goal of achieving 70% clean energy by 2030 through renewable energy and energy efficiency.

  16. Colorado State University Center for Advising & Student Achievement

    E-Print Network [OSTI]

    at CASA are first and second year learning communities serving a highly diverse student population Academic Culture, Communication, and Sports is a first-year Learning Community focused on the integration1 Colorado State University Center for Advising & Student Achievement Position Description Key Plus

  17. Does Beamforming achieve Outage Capacity with Direction Feedback?

    E-Print Network [OSTI]

    Jafar, Syed A.

    Does Beamforming achieve Outage Capacity with Direction Feedback? Sudhir Srinivasa and Syed Ali: syed@ece.uci.edu, sudhirs@uci.edu Email: sriram@ece.utexas.edu Abstract We explore the outage capacity of outage capacity for a quantized channel direction feedback system. The technique is used to establish

  18. Achievable Transmission Capacity of Cognitive Radio Networks with Cooperative Relaying

    E-Print Network [OSTI]

    Cheng, Xiuzhen "Susan"

    Achievable Transmission Capacity of Cognitive Radio Networks with Cooperative Relaying Xiuying Chen, Washington DC, USA 3VTT - Technical Research Centre of Finland, Kaitov¨ayl¨a 1, Oulu, Finland {10120069,tjing that secondary users can only work under a low transmission power condition in an underlay spectrum sharing model

  19. Achieving Differential Privacy of Data Disclosure in the Smart Grid

    E-Print Network [OSTI]

    Li, Xiang-Yang

    Achieving Differential Privacy of Data Disclosure in the Smart Grid Jing Zhao Taeho Jung Yu Wang-- The smart grid introduces new privacy implications to individuals and their family due to the fine of the proposed method over existing BLH methods. Index Terms--Smart Grid, Smart Meter, Privacy, Differential

  20. Achieving excellence in engineering education: the ingredients of

    E-Print Network [OSTI]

    1 Achieving excellence in engineering education: the ingredients of successful change #12;2 4.1 Case study 1: Department of Civil, Environmental & Geomatic Engineering, Faculty of Engineering Geomatic Engineering and other departments in the School, the Vice Dean (Education) for the School

  1. Database Research: Achievements and Opportunities Into the 21st Century

    E-Print Network [OSTI]

    Ullman, Jeffrey D.

    Database Research: Achievements and Opportunities Into the 21st Century Avi Silberschatz, Mike Stonebraker, Jeff Ullman, editors Report of an NSF Workshop on the Future of Database Systems Research, May 26--27, 1995 1 1 Introduction In February of 1990, a group of database researchers met to examine the prospects

  2. Target Feasibility Achievement in Enterprise-Driven Hierarchical Multidisciplinary Design

    E-Print Network [OSTI]

    Chen, Wei

    problem where decisions on product design and market strategies are made simultaneously. In practicalTarget Feasibility Achievement in Enterprise-Driven Hierarchical Multidisciplinary Design Harrison is used to set the right targets for the engineering design process that maximize utility

  3. Biofuels' Time of Transition Achieving high performance in a world

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Biofuels' Time of Transition Achieving high performance in a world of increasing fuel diversity #12;2 Table of contents #12;3 Introduction Up close: Highlights of Accenture's first biofuels study An evolving biofuels industry 1 Consumer influence Guest commentary on land-use change In focus: The food

  4. Work Structuring to Achieve Integrated ProductProcess Design

    E-Print Network [OSTI]

    Tommelein, Iris D.

    Work Structuring to Achieve Integrated Product­Process Design Cynthia C. Y. Tsao, A.M.ASCE1 ; Iris presents "work structuring," a term used to describe the effort of integrating product and process design product and process design. We propose shifting the focus of work structuring from maximizing local trade

  5. Characterization of Contour Shapes Achievable with a MEMS Deformable Mirror

    E-Print Network [OSTI]

    Bifano, Thomas

    Characterization of Contour Shapes Achievable with a MEMS Deformable Mirror Yaopeng Zhou and Thomas for a particular AO application can be determined. In this paper, we characterize one MEMS DM that was recently electrostatic actuation in an architecture that has been described previously. We incorporated the MEMS mirror

  6. Energy Savings Achievable in Connection Preserving Energy Saving Algorithms

    E-Print Network [OSTI]

    Mao, Guoqiang

    Energy Savings Achievable in Connection Preserving Energy Saving Algorithms Seh Chun Ng School ICT Australia Limited Canberra, Australia Email: brian.anderson@nicta.com.au Abstract--Energy saving is an important design consideration in wireless sensor networks. In this paper, we analyze the energy savings

  7. Spectrum of Controlling and Observing Complex Networks

    E-Print Network [OSTI]

    Yan, Gang; Barzel, Baruch; Slotine, Jean-Jacques; Liu, Yang-Yu; Barabasi, Albert-Laszlo

    2015-01-01

    Observing and controlling complex networks are of paramount interest for understanding complex physical, biological and technological systems. Recent studies have made important advances in identifying sensor or driver nodes, through which we can observe or control a complex system. Yet, the observation uncertainty induced by measurement noise and the energy cost required for control continue to be significant challenges in practical applications. Here we show that the control energy cost and the observation uncertainty vary widely in different directions of the state space. In particular, we find that if all nodes are directly driven, control is energetically feasible, as the maximum energy cost increases sublinearly with the system size. If, however, we aim to control a system by driving only a single node, control in some directions is energetically prohibitive, increasing exponentially with the system size. For the cases in between, the maximum energy decays exponentially if we increase the number of driv...

  8. Using LGI experiments to achieve better understanding of pedestal-edge coupling in NSTX-U

    SciTech Connect (OSTI)

    Wang, Zhehui

    2015-02-23

    PowerPoint presentation. Latest advances in granule or dust injection technologies, fast and high-resolution imaging, together with micro-/nano-structured material fabrication, provide new opportunities to examine plasma-material interaction (PMI) in magnetic fusion environment. Some of our previous work in these areas is summarized. The upcoming LGI experiments in NSTX-U will shed new light on granular matter transport in the pedestal-edge region. In addition to particle control, these results can also be used for code validation and achieving better understanding of pedestal-edge coupling in fusion plasmas in both NSTX-U and others.

  9. On the "viscosity maximum" during the uniaxial extension of a low density polyethylene

    E-Print Network [OSTI]

    Teodor I. Burghelea; Zdenek Stary; Helmut Muenstedt

    2010-01-13

    An experimental investigation of the viscosity overshoot phenomenon observed during uniaxial extension of a low density polyethylene is pre- sented. For this purpose, traditional integral viscosity measurements on a Muenstedt type extensional rheometer are combined with local mea- surements based on the in-situ visualization of the sample under exten- sion. For elongational experiments at constant strain rates within a wide range of Weissenberg numbers (Wi), three distinct deformation regimes are identified. Corresponding to low values of Wi (regime I), the tensile stress displays a broad maximum. This maximum can be explained by simple mathematical arguments as a result of low deformation rates and it should not be confused with the viscosity overshoot phenomenon. Corre- sponding to intermediate values of Wi (regime II), a local maximum of the integral extensional viscosity is systematically observed. However, within this regime, the local viscosity measurements reveal no maximum, but a plateau. Careful inspection of the images of samples within this regime shows that, corresponding to the maximum of the integral viscosity, sec- ondary necks develop along the sample. The emergence of a maximum of the integral elongational viscosity is thus related to the distinct in- homogeneity of deformation states and is not related to the rheological properties of the material. In the fast stretching limit (high Wi, regime III), the overall geometric uniformity of the sample is well preserved, no secondary necks are observed and both the integral and the local transient elongational viscosity show no maximum. A detailed comparison of the experimental findings with results from literature is presented.

  10. In order to achieve higher gas turbine efficiency, the main gas temperature at turbine inlet has been steadily increased from approximately 900C to about 1500C over the last few decades.

    E-Print Network [OSTI]

    In order to achieve higher gas turbine efficiency, the main gas temperature at turbine inlet has. This temperature is higher than the maximum acceptable temperature for turbine internals. The hot main gas may get the purge air is typically bled off the compressor discharge, this reducing the overall gas turbine

  11. Demonstrations of Integrated Advanced Rooftop Unit Controls and...

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

    confirmed that advanced RTU controllers can achieve heating, ventilation, and air conditioning (HVAC) energy and cost savings of more than 40% over the typical packaged air...

  12. White LED Benchmark of 65 Lumens Per Watt Achieved

    Broader source: Energy.gov [DOE]

    Novel chip design and the balance of multiple interrelated design parameters have enabled Cree, Inc.'s Santa Barbara Technology Center to demonstrate white LEDs with efficacies greater than 65 lumens per watt at 350 mA. The results are particularly significant because they were achieved with a pre-production prototype chip using the same package used in Cree's commercially available XLamp® 7090 high power LED, rather than a laboratory device.

  13. Upside-Down Solar Cell Achieves Record Efficiencies (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-12-01

    The inverted metamorphic multijunction (IMM) solar cell is an exercise in efficient innovation - literally, as the technology boasted the highest demonstrated efficiency for converting sunlight into electrical energy at its debut in 2005. Scientists at the National Renewable Energy Laboratory (NREL) inverted the conventional photovoltaic (PV) structure to revolutionary effect, achieving solar conversion efficiencies of 33.8% and 40.8% under one-sun and concentrated conditions, respectively.

  14. Industrial Energy Efficiency Achieving Success in a Difficult Environment 

    E-Print Network [OSTI]

    Castellow, C.

    2011-01-01

    EFFICIENCY ACHIEVING SUCCESS IN A DIFFICULT ENVIRONMENT CARL CASTELLOW DIRECTOR, INDUSTRIAL ENERGY EFFICIENCY SCHNEIDER ELECTRIC RALEIGH, NC ABSRACT Energy use and the resulting environmental impacts are major points of concern... threat would lead to consequences that would dwarf the economic woes already in place, he outlined fundamental principles of his new energy plan. Among his points: ? ?Conservation is the quickest, cheapest, most practical source of energy.? ? ?We...

  15. New Efficiency Record Achieved for White OLED Device

    Broader source: Energy.gov [DOE]

    Osram Opto-Semiconductors, Inc. has successfully demonstrated a white organic light emitting diode (OLED) with a record efficiency of 25 lumens per watt, the highest known efficiency achieved to date for a polymer-based white OLED. The 25 LPW cool-white-emitting device was produced by applying a standard external inorganic phosphor to Osram's record-breaking blue-emitting phosphorescent polymer device with a peak luminous efficacy of 14 LPW.

  16. The New York Times headquarters daylighting mockup: Monitoredperformance of the daylighting control system

    SciTech Connect (OSTI)

    Lee, Eleanor S.; Selkowitz, Stephen E.

    2006-02-24

    A nine-month monitored field study of the performance of automated roller shades and daylighting controls was conducted in a 401 m{sup 2} unoccupied, furnished daylighting mockup. The mockup mimicked the southwest corner of a new 110 km{sub 2} commercial building in New York, New York, where The New York Times will be the major tenant. This paper focuses on evaluating the performance of two daylighting control systems installed in separate areas of an open plan office with 1.2-m high workstation partitions: (1) Area A had 0-10 V dimmable ballasts with an open-loop proportional control system and an automated shade controlled to reduce window glare and increase daylight, and (2) Area B had digital addressable lighting interface (DALI) ballasts with a closed-loop integral reset control system and an automated shade controlled to block direct sun. Daylighting control system performance and lighting energy use were monitored. The daylighting control systems demonstrated very reliable performance after they were commissioned properly. Work plane illuminance levels were maintained above 90% of the maximum fluorescent illuminance level for 99.9{+-}0.5% and 97.9{+-}6.1% of the day on average over the monitored period, respectively, in Areas A and B. Daily lighting energy use savings were significant in both Areas over the equinox-to-equinox period compared to a non-daylit reference case. At 3.35 m from the window, 30% average savings were achieved with a sidelit west-facing condition in Area A while 50-60% were achieved with a bilateral daylit south-facing condition in Area B. At 4.57-9.14 m from the window, 5-10% and 25-40% savings were achieved in Areas A and B, respectively. Average savings for the 7-m deep dimming zone were 20-23% and 52-59% for Areas A and B, respectively, depending on the lighting schedule. The large savings and good reliability can be attributed to the automatic management of the interior shades. The DALI-based system exhibited faulty behavior that remains unexplained, but operational errors are expected to be resolved as DALI products reach full maturity. The building owner received very competitive bids ($30-75 US/DALI ballast) and was able to justify use of the daylighting control system based on operational cost savings and increased amenity. Additional energy savings due to reduced solar and lighting heat gains were not quantified but will add to the total operational cost savings.

  17. Control system design guide

    SciTech Connect (OSTI)

    Sellers, David; Friedman, Hannah; Haasl, Tudi; Bourassa, Norman; Piette, Mary Ann

    2003-05-01

    The ''Control System Design Guide'' (Design Guide) provides methods and recommendations for the control system design process and control point selection and installation. Control systems are often the most problematic system in a building. A good design process that takes into account maintenance, operation, and commissioning can lead to a smoothly operating and efficient building. To this end, the Design Guide provides a toolbox of templates for improving control system design and specification. HVAC designers are the primary audience for the Design Guide. The control design process it presents will help produce well-designed control systems that achieve efficient and robust operation. The spreadsheet examples for control valve schedules, damper schedules, and points lists can streamline the use of the control system design concepts set forth in the Design Guide by providing convenient starting points from which designers can build. Although each reader brings their own unique questions to the text, the Design Guide contains information that designers, commissioning providers, operators, and owners will find useful.

  18. Spectral Modeling of SNe Ia Near Maximum Light: Probing the Characteristics of Hydro Models

    E-Print Network [OSTI]

    E. Baron; S. Bongard; David Branch; Peter H. Hauschildt

    2006-03-03

    We have performed detailed NLTE spectral synthesis modeling of 2 types of 1-D hydro models: the very highly parameterized deflagration model W7, and two delayed detonation models. We find that overall both models do about equally well at fitting well observed SNe Ia near to maximum light. However, the Si II 6150 feature of W7 is systematically too fast, whereas for the delayed detonation models it is also somewhat too fast, but significantly better than that of W7. We find that a parameterized mixed model does the best job of reproducing the Si II 6150 line near maximum light and we study the differences in the models that lead to better fits to normal SNe Ia. We discuss what is required of a hydro model to fit the spectra of observed SNe Ia near maximum light.

  19. Estimating the maximum potential revenue for grid connected electricity storage : arbitrage and regulation.

    SciTech Connect (OSTI)

    Byrne, Raymond Harry; Silva Monroy, Cesar Augusto.

    2012-12-01

    The valuation of an electricity storage device is based on the expected future cash ow generated by the device. Two potential sources of income for an electricity storage system are energy arbitrage and participation in the frequency regulation market. Energy arbitrage refers to purchasing (stor- ing) energy when electricity prices are low, and selling (discharging) energy when electricity prices are high. Frequency regulation is an ancillary service geared towards maintaining system frequency, and is typically procured by the independent system operator in some type of market. This paper outlines the calculations required to estimate the maximum potential revenue from participating in these two activities. First, a mathematical model is presented for the state of charge as a function of the storage device parameters and the quantities of electricity purchased/sold as well as the quantities o ered into the regulation market. Using this mathematical model, we present a linear programming optimization approach to calculating the maximum potential revenue from an elec- tricity storage device. The calculation of the maximum potential revenue is critical in developing an upper bound on the value of storage, as a benchmark for evaluating potential trading strate- gies, and a tool for capital nance risk assessment. Then, we use historical California Independent System Operator (CAISO) data from 2010-2011 to evaluate the maximum potential revenue from the Tehachapi wind energy storage project, an American Recovery and Reinvestment Act of 2009 (ARRA) energy storage demonstration project. We investigate the maximum potential revenue from two di erent scenarios: arbitrage only and arbitrage combined with the regulation market. Our analysis shows that participation in the regulation market produces four times the revenue compared to arbitrage in the CAISO market using 2010 and 2011 data. Then we evaluate several trading strategies to illustrate how they compare to the maximum potential revenue benchmark. We conclude with a sensitivity analysis with respect to key parameters.

  20. Dream controller

    DOE Patents [OSTI]

    Cheng, George Shu-Xing; Mulkey, Steven L; Wang, Qiang; Chow, Andrew J

    2013-11-26

    A method and apparatus for intelligently controlling continuous process variables. A Dream Controller comprises an Intelligent Engine mechanism and a number of Model-Free Adaptive (MFA) controllers, each of which is suitable to control a process with specific behaviors. The Intelligent Engine can automatically select the appropriate MFA controller and its parameters so that the Dream Controller can be easily used by people with limited control experience and those who do not have the time to commission, tune, and maintain automatic controllers.

  1. Sparse Control of Quantum Systems

    E-Print Network [OSTI]

    Gero Friesecke; Felix Henneke; Karl Kunisch

    2015-07-02

    A new class of cost functionals for optimal control of quantum systems which produces controls which are sparse in frequency and smooth in time is proposed. This is achieved by penalizing a suitable time-frequency representation of the control field, rather than the control field itself, and by employing norms which are of $L^1$ or measure form with respect to frequency but smooth with respect to time. A mathematical framework is developed which yields existence of optimal controls and necessary optimality conditions of the resulting nonsmooth, nonconvex optimization problem. The framework covers the important systems of physical interest, including (infinite-dimensional) Schr\\"odinger dynamics on multiple potential energy surfaces as arising in laser control of chemical reactions. Numerical simulations demonstrate that the optimal controls, unlike those obtained with the usual $L^2$ or $H^1$ costs, concentrate on just a few frequencies, even in the infinite-dimensional case of laser-controlled chemical reactions.

  2. Design, construction and analysis of an LED strobe controller

    E-Print Network [OSTI]

    Villalva, Nicholas E

    2012-01-01

    In this thesis, I describe an LED strobe controller that I designed and built. With the advent of much brighter LEDs, it is possible to create stroboscopes with both high intensity output and high maximum flash rates. ...

  3. Gas Turbine Fired Heater Integration: Achieve Significant Energy Savings 

    E-Print Network [OSTI]

    Iaquaniello, G.; Pietrogrande, P.

    1985-01-01

    stream_source_info ESL-IE-85-05-23.pdf.txt stream_content_type text/plain stream_size 22051 Content-Encoding ISO-8859-1 stream_name ESL-IE-85-05-23.pdf.txt Content-Type text/plain; charset=ISO-8859-1 GAS TURBINE FIRED... HEATER INTEGRATION: ACHIEVE SIGNIFICANT ENERGY SAVINGS G. Iaquaniello**, P. Pietrogrande* *KTI Corp., Research and Development Division, Monrovia, California **KTI SpA, Rome, Italy ABSTRAer Faster payout will result if gas turbine exhaust is used...

  4. Achieving improved cycle efficiency via pressure gain combustors

    SciTech Connect (OSTI)

    Gemmen, R.S.; Janus, M.C.; Richards, G.A.; Norton, T.S. [USDOE Morgantown Energy Technology Center, WV (United States); Rogers, W.A. [EG& G Technical Services of West Virginia, Morgantown, WV (United States)

    1995-04-01

    As part of the Department of Energy`s Advanced Gas Turbine Systems Program, an investigation is being performed to evaluate ``pressure gain`` combustion systems for gas turbine applications. This paper presents experimental pressure gain and pollutant emission data from such combustion systems. Numerical predictions for certain combustor geometries are also presented. It is reported that for suitable aerovalved pulse combustor geometries studied experimentally, an overall combustor pressure gain of nearly 1 percent can be achieved. It is also shown that for one combustion system operating under typical gas turbine conditions, NO{sub x} and CO emmissions, are about 30 ppmv and 8 ppmv, respectively.

  5. Achievements of structural genomics (Technical Report) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report: Achievements of structural genomics Citation Details In-Document Search

  6. Achievements of structural genomics (Conference) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnicalInformation4563Abuse Tolerance Improvements CitationConference: Achievements of

  7. Achievements of structural genomics (Journal Article) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnicalInformation4563Abuse Tolerance Improvements CitationConference: Achievements

  8. Achievements of structural genomics (Technical Report) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnicalInformation4563Abuse Tolerance Improvements CitationConference:Achievements of

  9. Achievements of structural genomics (Technical Report) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnicalInformation4563Abuse Tolerance Improvements CitationConference:Achievements

  10. Workgroup 1: Model or Achieving Programmatic Savings Name Affiliation

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking WithTelecentricNCubictheThepresented in1: Model or Achieving

  11. Achieving 30% Renewable Electricity Use by 2025 | Department of Energy

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment| DepartmentAL/FAL 99-01 More5,Achieving 30% Renewable Electricity Use by

  12. NERSC Announces Winners of Inaugural HPC Achievement Awards

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework usesof Energy Moving ForwardAchievement AwardsAnnounces Winners of

  13. Achieving Water-Sustainable Bioenergy Production | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3AUDIT REPORT:Federal Employee Fatality atRenewableAchieving

  14. Real Time Flux Control in PM Motors

    SciTech Connect (OSTI)

    Otaduy, P.J.

    2005-09-27

    Significant research at the Oak Ridge National Laboratory (ORNL) Power Electronics and Electric Machinery Research Center (PEEMRC) is being conducted to develop ways to increase (1) torque, (2) speed range, and (3) efficiency of traction electric motors for hybrid electric vehicles (HEV) within existing current and voltage bounds. Current is limited by the inverter semiconductor devices' capability and voltage is limited by the stator wire insulation's ability to withstand the maximum back-electromotive force (emf), which occurs at the upper end of the speed range. One research track has been to explore ways to control the path and magnitude of magnetic flux while the motor is operating. The phrase, real time flux control (RTFC), refers to this mode of operation in which system parameters are changed while the motor is operating to improve its performance and speed range. RTFC has potential to meet an increased torque demand by introducing additional flux through the main air gap from an external source. It can augment the speed range by diverting flux away from the main air gap to reduce back-emf at high speeds. Conventional RTFC technology is known as vector control [1]. Vector control decomposes the stator current into two components; one that produces torque and a second that opposes (weakens) the magnetic field generated by the rotor, thereby requiring more overall stator current and reducing the efficiency. Efficiency can be improved by selecting a RTFC method that reduces the back-emf without increasing the average current. This favors methods that use pulse currents or very low currents to achieve field weakening. Foremost in ORNL's effort to develop flux control is the work of J. S. Hsu. Early research [2,3] introduced direct control of air-gap flux in permanent magnet (PM) machines and demonstrated it with a flux-controlled generator. The configuration eliminates the problem of demagnetization because it diverts all the flux from the magnets instead of trying to oppose it. It is robust and could be particularly useful for PM generators and electric vehicle drives. Recent efforts have introduced a brushless machine that transfers a magneto-motive force (MMF) generated by a stationary excitation coil to the rotor [4]. Although a conventional PM machine may be field weakened using vector control, the air-gap flux density cannot be effectively enhanced. In Hsu's new machine, the magnetic field generated by the rotor's PM may be augmented by the field from the stationery excitation coil and channeled with flux guides to its desired destination to enhance the air-gap flux that produces torque. The magnetic field can also be weakened by reversing the current in the stationary excitation winding. A patent for advanced technology in this area is pending. Several additional RTFC methods have been discussed in open literature. These include methods of changing the number of poles by magnetizing and demagnetizing the magnets poles with pulses of current corresponding to direct-axis (d-axis) current of vector control [5,6], changing the number of stator coils [7], and controlling the air gap [8]. Test experience has shown that the magnet strengths may vary and weaken naturally as rotor temperature increases suggesting that careful control of the rotor temperature, which is no easy task, could yield another method of RTFC. The purpose of this report is to (1) examine the interaction of rotor and stator flux with regard to RTFC, (2) review and summarize the status of RTFC technology, and (3) compare and evaluate methods for RTFC with respect to maturity, advantages and limitations, deployment difficulty and relative complexity.

  15. Basic Theory in Construction of Boolean Functions with Maximum Possible Annihilator Immunity

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Basic Theory in Construction of Boolean Functions with Maximum Possible Annihilator Immunity #3. In this paper we present a construction keeping in mind the basic theory of annihilator immunity the basic theory. Most importantly, the cryptographic properties of our constructions, such as nonlinearity

  16. Basic Theory in Construction of Boolean Functions with Maximum Possible Annihilator Immunity

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Basic Theory in Construction of Boolean Functions with Maximum Possible Annihilator Immunity Deepak present a construction keeping in mind the basic theory of annihilator immunity. This construction immunity that comes from the basic theory. Most importantly, the cryptographic properties of our

  17. Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone

    E-Print Network [OSTI]

    Wang, Yuqing

    0 Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated is eventually dissipated due to surface friction. Since the energy production rate is a linear function while intensifies. When the dissipation rate eventually reaches the production rate, the TC has no excess energy

  18. Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone*

    E-Print Network [OSTI]

    Wang, Yuqing

    Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated is eventually dissipated due to surface friction. Since the energy production rate is a linear function while intensifies. When the dissipation rate eventually reaches the production rate, the TC has no excess energy

  19. Linearized semiclassical initial value time correlation functions with maximum entropy analytic continuation

    E-Print Network [OSTI]

    Miller, William H.

    Linearized semiclassical initial value time correlation functions with maximum entropy analytic procedure to be a very significant enhancement of the LSC-IVR for correlation functions of both linear method is used to extend the range of accuracy of the linearized semiclassical initial value

  20. Regression Model for Daily Maximum Stream Temperature David W. Neumann1

    E-Print Network [OSTI]

    Balaji, Rajagopalan

    Regression Model for Daily Maximum Stream Temperature David W. Neumann1 ; Balaji Rajagopalan2 for the summer period. The model is created using a stepwise linear regression procedure to select significant-9372 2003 129:7 667 CE Database subject headings: Decision support systems; Regression models; California

  1. Sub-Module Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

    E-Print Network [OSTI]

    Perreault, Dave

    Sub-Module Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications explores the benefits of distributed power electronics in solar photovoltaic applications through the use, interest in renewable energy sources has in- creased. Among these, solar photovoltaic (PV) energy has seen

  2. Sub-Module Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

    E-Print Network [OSTI]

    Perreault, Dave

    Sub-Module Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications 2012. Abstract--This paper explores the benefits of distributed power electronics in solar photovoltaic, interest in renewable energy sources has in- creased. Among these, solar photovoltaic (PV) energy has seen

  3. Power and Sample Size Determination for a Stepwise Test Procedure for Finding the Maximum Safe Dose

    E-Print Network [OSTI]

    Tamhane, Ajit C.

    Power and Sample Size Determination for a Stepwise Test Procedure for Finding the Maximum Safe Dose This paper addresses the problem of power and sample size calculation for a stepwise multiple test procedure of a compound. A general expression for the power of this procedure is derived. It is used to find the minimum

  4. Maximum CME speed as an indicator of solar and geomagnetic activities , V.B. Yurchyshyn1

    E-Print Network [OSTI]

    relationships with one another. Although the relationship between the solar and geomagnetic activity indices hasMaximum CME speed as an indicator of solar and geomagnetic activities A. Kilcik1 , V.B. Yurchyshyn1 , V. Abramenko1 , P.R. Goode1 , N. Gopalswamy2 , A. Ozguc3 , J.P. Rozelot4 1 Big Bear Solar

  5. Extraction of Spectral Functions from Dyson-Schwinger Studies via the Maximum Entropy Method

    E-Print Network [OSTI]

    Dominik Nickel

    2006-07-20

    It is shown how to apply the Maximum Entropy Method (MEM) to numerical Dyson-Schwinger studies for the extraction of spectral functions of correlators from their corresponding Euclidean propagators. Differences to the application in lattice QCD are emphasized and, as an example, the spectral functions of massless quarks in cold and dense matter are presented.

  6. Design of wind farm layout for maximum wind energy capture Andrew Kusiak*, Zhe Song

    E-Print Network [OSTI]

    Kusiak, Andrew

    of reducing the cost of producing wind power: for example, the site selection, site layout design, predictiveDesign of wind farm layout for maximum wind energy capture Andrew Kusiak*, Zhe Song Intelligent Accepted 24 August 2009 Available online 22 September 2009 Keywords: Wind farm Wind turbine Layout design

  7. Experimental evaluation of algorithmic solutions for the maximum generalised network ow problem

    E-Print Network [OSTI]

    Radzik, Tomasz

    ; Tomasz Radzik y King's College London Shengxiang Yang z University of Leicester Department of Computer Science, King's College London Technical Report TR-01-09 December 2001 Abstract The maximum generalised problem models some optimisation problems arising in manufacturing, transportation and #12;nancial

  8. Low-energy particle response to CMEs during the Ulysses solar maximum northern polar passage

    E-Print Network [OSTI]

    Sanahuja, Blai

    Low-energy particle response to CMEs during the Ulysses solar maximum northern polar passage D, New Mexico, USA T. R. Sanderson Research and Scientific Support Department of European Space Agency 2001), Ulysses remained immersed in polar coronal hole solar wind flow and observed five intense solar

  9. Recursive maximum likelihood estimation for structural health monitoring: Kalman and particle filter implementations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Recursive maximum likelihood estimation for structural health monitoring: Kalman and particle by a likelihood approach. In a first part the structural health monitoring problem is written in term of recursive al [6] in a more simple framework. Particle approximation for health monitoring was already proposed

  10. Operations Research Letters 21 (1997) 211217 An algorithm for nding a maximum clique in a graph

    E-Print Network [OSTI]

    Wood, David R.

    1997-01-01

    . We denote the set of vertices adjacent to vV by NG(v) and the subgraph of G induced by S V by G a vertex vS with maximum degree in G, and set Q := Q {v} and S := S NG(v). We now turn our attention

  11. An Analysis of the Maximum Drawdown Risk Malik Magdon-Ismail

    E-Print Network [OSTI]

    Magdon-Ismail, Malik

    Engineering Cairo University Giza, Egypt. amir@alumni.caltech.edu Introduction. The maximum cumulative loss to the Calmar ratio is the Sterling ratio, Sterling(T) = Return over [0,T ] MDD over [0,T ]-10% , and our discussion applies equally well to the Sterling ratio. 1 #12;primarily due to a lack of an analytical

  12. An Analysis of the Maximum Drawdown Risk Malik MagdonIsmail

    E-Print Network [OSTI]

    Magdon-Ismail, Malik

    Engineering Cairo University Giza, Egypt. amir@alumni.caltech.edu Introduction. The maximum cumulative loss is not prevalent 1 Similar to the Calmar ratio is the Sterling ratio, Sterling(T ) = Return over [0,T ] MDD over [0,T ]-10% , and our discussion applies equally well to the Sterling ratio. 1 #12; primarily due

  13. Mathematical Geology, Vol. 30, No. 3, 1998 A Bootstrap Test Using Maximum Likelihood Ratio

    E-Print Network [OSTI]

    Chatterjee, Snigdhansu

    Mathematical Geology, Vol. 30, No. 3, 1998 A Bootstrap Test Using Maximum Likelihood Ratio 24 January 1997; revised 10 May 1997. 2Geological Studies Unit, Indian Statistical Institute, 203 B-8121/98/0400-0275$15.00/1 © 1998 International Association for Mathematical Geology KEY WORDS: polar coordinates, joint frequency

  14. Maximum size of drops levitated by an air cushion Jacco H. Snoeijer,1,2

    E-Print Network [OSTI]

    Eggers, Jens

    , kept aloft by a stream of water vapor. We investigate the limit of small flow rates, for which the size for the manipulation of corrosive sub- stances 10 or the frictionless displacement of drops 6 . Of particular interest is the maximum drop size that can be sus- tained, and the limit of very small flow rates. The drop con- tinues

  15. Hydraulic limits on maximum plant transpiration and the emergence of the safetyefficiency trade-off

    E-Print Network [OSTI]

    Jackson, Robert B.

    Hydraulic limits on maximum plant transpiration and the emergence of the safety­efficiency trade.12126 Key words: hydraulic limitation, safety­ efficiency trade-off, soil­plant­atmosphere model, trait hydraulics constrain ecosystem productivity by setting physical limits to water transport and hence carbon

  16. MAximum Multicore POwer (MAMPO) -An Automatic Multithreaded Synthetic Power Virus Generation

    E-Print Network [OSTI]

    John, Lizy Kurian

    and cooling issues along with a world-wide initiative towards green computing, power consump- tion is a firstMAximum Multicore POwer (MAMPO) - An Automatic Multithreaded Synthetic Power Virus Generation worst case power consumption for a com- puter system is a significant design parameter and it is a very

  17. STRAY-LIGHT CORRECTION IN MAGNETOGRAPH OBSERVATIONS USING THE MAXIMUM ENTROPY METHOD

    E-Print Network [OSTI]

    STRAY-LIGHT CORRECTION IN MAGNETOGRAPH OBSERVATIONS USING THE MAXIMUM ENTROPY METHOD JONGCHUL CHAE1 June 1998; accepted 17 July 1998) Abstract. We have developed a method of stray-light correction which is applicable to filter-based magnetograph observations. Stray-light-corrected Stokes images are obtained

  18. NOAA Technical Memorandum NWS HYDRO 39 PROBABLE MAXIMUM PRECIPITATION FOR THE UPPER

    E-Print Network [OSTI]

    NOAA Technical Memorandum NWS HYDRO 39 PROBABLE MAXIMUM PRECIPITATION FOR THE UPPER DEERFIELD RIVER The Office of Hydrology (HYDRO) of the National Weather Service (NWS) develops procedures for making river agencies, and conducts pertinent research and development. NOAA Technical Memorandums in the NWS HYDRO

  19. Relating maximum airway dilation and subsequent reconstriction to reactivity in human lungs

    E-Print Network [OSTI]

    Lutchen, Kenneth

    Relating maximum airway dilation and subsequent reconstriction to reactivity in human lungs Lauren in human lungs. J Appl Physiol 96: 1808­1814, 2004. First published February 6, 2004; 10.1152/japplphysiol reactivity in healthy lungs by prohibiting DI for an extended period. The present study had two goals. First

  20. Study of Different Implementation Approaches for a Maximum Power Point Florent Boico Brad Lehman

    E-Print Network [OSTI]

    Lehman, Brad

    of solar panels has limited their use. As the efficiency is limited, harvesting the maximum amount no other source is available. However, these solar panels have lower efficiency than average solar cells in suddenly changing illumination conditions. Solar Panels have been used for decades to generate electricity

  1. Aalborg Universitet Individual Module Maximum Power Point Tracking for a Thermoelectric Generator

    E-Print Network [OSTI]

    Schaltz, Erik

    Aalborg Universitet Individual Module Maximum Power Point Tracking for a Thermoelectric Generator Tracking for a Thermoelectric Generator Systems. Poster session presented at The 31st International & 10th Generator Systems Casper Vadstrup (cvdst08@student.aau.dk), Min Chen (mch@et.aau.dk), Erik Schaltz (esc

  2. The probable value of the Lovasz-Schrijver relaxations for maximum independent set

    E-Print Network [OSTI]

    Krauthgamer, Robert

    Introduction Let G(V, E) be a graph on n vertices. An independent set (a.k.a. stable set) in G is a subset an independent set of maximum size in an input graph G. The independence number (a.k.a. stability number) of G

  3. The probable value of the LovaszSchrijver relaxations for maximum independent set #

    E-Print Network [OSTI]

    Krauthgamer, Robert

    Introduction Let G(V, E) be a graph on n vertices. An independent set (a.k.a. stable set) in G is a subset an independent set of maximum size in an input graph G. The independence number (a.k.a. stability number) of G

  4. On Finding the Maximum Number of Disjoint Cuts in Seymour Graphs ?

    E-Print Network [OSTI]

    Ageev, Alexandr

    On Finding the Maximum Number of Disjoint Cuts in Seymour Graphs ? Alexander A. Ageev Sobolev. In this paper we prove that the problem is polynomially solvable on Seymour graphs which include both all bipar is polynomially solvable when restricted to the family of Seymour graphs. To present a rigorous definition

  5. PHYSICAL REVIEW E 86, 041144 (2012) Efficiency at maximum power for classical particle transport

    E-Print Network [OSTI]

    Lindenberg, Katja

    2012-01-01

    PHYSICAL REVIEW E 86, 041144 (2012) Efficiency at maximum power for classical particle transport transport. DOI: 10.1103/PhysRevE.86.041144 PACS number(s): 05.70.Ln, 05.40.-a, 05.20.-y I. INTRODUCTION Over, operating between a hot and cold bath at temperatures T (1) and T (2) , respectively, possesses universal

  6. Radiative Impacts on the Growth of Drops within Simulated Marine Stratocumulus. Part I: Maximum Solar Heating

    E-Print Network [OSTI]

    Harrington, Jerry Y.

    Radiative Impacts on the Growth of Drops within Simulated Marine Stratocumulus. Part I: Maximum Solar Heating CHRISTOPHER M. HARTMAN AND JERRY Y. HARRINGTON Department of Meteorology, The Pennsylvania November 2004) ABSTRACT The effects of solar heating and infrared cooling on the vapor depositional growth

  7. Optimal control of wireless networks with finite buffers

    E-Print Network [OSTI]

    Le, Long Bao

    This paper considers network control for wireless networks with finite buffers. We investigate the performance of joint flow control, routing, and scheduling algorithms which achieve high network utility and deterministically ...

  8. Resonance Entrainment of Tensegrity Structures via CPG Control

    E-Print Network [OSTI]

    Bart-Smith, Hilary

    Resonance Entrainment of Tensegrity Structures via CPG Control Thomas K. Bliss a , Tetsuya Iwasaki of resonance entrainment. Tensegrities are novel, nonlinear dynamic structures featuring high strength to achieve entrainment to a prescribed resonance mode. Key words: Neural control, Oscillation, Resonance

  9. Determination of a cost-effective air pollution control technology for the control of VOC and HAP emissions from a steroids processing plant

    SciTech Connect (OSTI)

    Hamel, T.M.

    1997-12-31

    A steroids processing plant located in northeastern Puerto Rico emits a combined average of 342 lb/hr of hazardous air pollutants (HAPs) and volatile organic compounds (VOCs) from various process operations. The approach that this facility used to implement maximum achievable control technology (MACT) may assist others who must contend with MACT for pharmaceutical or related manufacturing facilities. Federal air regulations define MACT standards for stationary sources emitting any of 189 HAPs. The MACT standards detailed in the NESHAPs are characterized by industry and type of emission control system or technology. It is anticipated that the standard will require HAP reductions of approximately 95%. The steroid plant`s emissions include the following pollutant loadings: VOC/HAP Emission Rate (lb/hr): Methanol 92.0; Acetone 35.0; Methylene chloride 126.0; Chloroform 25.0; Ethyl acetate 56.0; Tetrahydrofuran 5.00; and 1,4-Dioxane 3.00. The facility`s existing carbon adsorption control system was nearing the end of its useful life, and the operators sought to install an air pollution control system capable of meeting MACT requirements for the pharmaceutical industry. Several stand-alone and hybrid control technologies were considered for replacement of the carbon adsorption system at the facility. This paper examines the following technologies: carbon adsorption, membrane separation, thermal oxidation, membrane separation-carbon adsorption, and condensation-carbon adsorption. Each control technology is described; the advantages and disadvantages of utilizing each technology for the steroid processing plant are examined; and capital and operating costs associated with the implementation of each technology are presented. The rationale for the technology ultimately chosen to control VOC and HAP emissions is presented.

  10. The effects of early home literacy environments on fourth-grade literacy achievement: an international comparison

    E-Print Network [OSTI]

    Arya, DJ; McClung, NA; Maul, A; Cunningham, AE

    2014-01-01

    of Educational Achievement (IEA), Publisher: TIMSS & PIRLSfor the Evaluation of Educational Achievement (IEA),IEA Secretariat, Amsterdam, the Netherlands. Reese, L. and

  11. Adiabatic feedback control of Hamiltonian systems

    E-Print Network [OSTI]

    A. E. Allahverdyan; K. G. Petrosyan; D. B. Saakian

    2006-07-09

    We study feedback control of classical Hamiltonian systems with the controlling parameter varying slowly in time. The control aims to change system's energy. We show that the control problems can be solved with help of an adiabatic invariant that generalizes the conservation of the phase-space volume to control situations. New mechanisms of control for achieving heating, cooling, entropy reduction and particle trapping are found. The feedback control of a many-body system via one of its coordinates is discussed. The results are illustrated by two basic models of non-linear physics.

  12. Electric vehicle climate control

    SciTech Connect (OSTI)

    Dauvergne, J.

    1994-04-01

    EVs have insufficient energy sources for a climatic comfort system. The heat rejection of the drivetrain is dispersed in the vehicle (electric motor, batteries, electronic unit for power control). Its level is generally low (no more than 2-kW peaks) and variable according to the trip profile, with no heat rejection at rest and a maximum during regenerative braking. Nevertheless, it must be used for heating. It is not realistic to have the A/C compressor driven by the electric traction motor: the motor does not operate when the vehicle is at rest, precisely when maximum cooling power is required. The same is true for hybrid vehicles during electric operation. It is necessary to develop solutions that use stored onboard energy either from the traction batteries or specific storage source. In either case, it is necessary to design the climate control system to use the energy efficiently to maximize range and save weight. Heat loss through passenger compartment seals and the walls of the passenger compartment must be limited. Plastic body panes help to reduce heat transfer, and heat gain is minimized with insulating glazing. This article describes technical solutions to solve the problem of passenger thermal comfort. However, the heating and A/C systems of electrically operated vehicles may have marginal performance at extreme outside temperatures.

  13. Past Achievements and Future Challenges in 3D Photonic Metamaterials

    E-Print Network [OSTI]

    Soukoulis, Costas M

    2011-01-01

    Photonic metamaterials are man-made structures composed of tailored micro- or nanostructured metallo-dielectric sub-wavelength building blocks that are densely packed into an effective material. This deceptively simple, yet powerful, truly revolutionary concept allows for achieving novel, unusual, and sometimes even unheard-of optical properties, such as magnetism at optical frequencies, negative refractive indices, large positive refractive indices, zero reflection via impedance matching, perfect absorption, giant circular dichroism, or enhanced nonlinear optical properties. Possible applications of metamaterials comprise ultrahigh-resolution imaging systems, compact polarization optics, and cloaking devices. This review describes the experimental progress recently made fabricating three-dimensional metamaterial structures and discusses some remaining future challenges.

  14. Progress on achieving the ICF conditions needed for high gain

    SciTech Connect (OSTI)

    Lindl, J.D.

    1988-12-23

    Progress during the past two years has moved us much closer to demonstrating the scientific and technological requirements for high gain ICF in the laboratory. This progress has been made possible by operating at the third harmonic of 1..mu..m light which dramatically reduces concern about hot electrons and by advances in diagnostics such as 100 ps x-ray framing cameras which greatly increase the data available from each experiment. Making use of many of these new capabilities, major improvements in confinement conditions have been achieved for ICF implosions. In particular, in an optimized hohlraum on Nova, radiation driven implosions with convergence ratio in excess of 30 (volume compression /approximately/3 /times/ 10/sup 4/) have performed essentially as predicted by spherical implosion calculations. This paper presents these results as well as examples of advances in several other areas and discusses the implications for the future of ICF with lasers and heavy ion beam drivers. 8 refs., 10 figs.

  15. Modelling and control of satellite formations 

    E-Print Network [OSTI]

    Vaddi, Veera Venkata Sesha Sai

    2004-09-30

    ®erent satellites in a formation. To achieve the various mission objectives it is necessary for a formation to recon¯gure itself periodically. An analytical impulsive control scheme has been developed for this purpose. This control scheme has the distinct advantage... . . . . . . . . . . . . . . . . . . 15 1.4.2 Impulsive Control . . . . . . . . . . . . . . . . . . . 16 1.5 Goals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.6 Nonlinearity and Eccentricity Perturbations . . . . . . . . 18 1.7 Linear and Nonlinear Controllers...

  16. Superheat Control: A Hybrid Approach 

    E-Print Network [OSTI]

    Elliot, M.S.; Rasmussen, B.P.; Walton, Z.; Bolding, B.

    2009-01-01

    , poorly tuned EEVs can still exhibit undesirable behavior, and frequent valve adjustments raise concerns about device longevity. In this work, we propose a cascaded control approach, which regulates evapo- rator pressure and superheat and is achieved... with a feedback control device that uses a hybrid of mechanical and electronic feedback. Analysis of the fundamental dynamic behavior of evapo- rator superheat motivates this approach, while experimental evaluation of two separate systems demonstrates...

  17. Evaluation of Maximum Radionuclide Groundwater Concentrations for Basement Fill Model. Zion Station Restoration Project

    SciTech Connect (OSTI)

    Sullivan, Terry

    2014-12-02

    ZionSolutions is in the process of decommissioning the Zion Nuclear Power Plant in order to establish a new water treatment plant. There is some residual radioactive particles from the plant which need to be brought down to levels so an individual who receives water from the new treatment plant does not receive a radioactive dose in excess of 25 mrem/y?¹. The objectives of this report are: (a) To present a simplified conceptual model for release from the buildings with residual subsurface structures that can be used to provide an upper bound on contaminant concentrations in the fill material; (b) Provide maximum water concentrations and the corresponding amount of mass sorbed to the solid fill material that could occur in each building for use in dose assessment calculations; (c) Estimate the maximum concentration in a well located outside of the fill material; and (d) Perform a sensitivity analysis of key parameters.

  18. Algorithms for optimized maximum entropy and diagnostic tools for analytic continuation

    E-Print Network [OSTI]

    Bergeron, Dominic

    2015-01-01

    Analytic continuation of numerical data obtained in imaginary time or frequency has become an essential part of many branches of quantum computational physics. The maximum-entropy approach is the most widely used method whenever the data contains some numerical uncertainties, especially in Monte-Carlo based calculations. Here we present a highly optimized approach to maximum-entropy implemented in a freely available software that is both fast and accurate and offers quality-of-fit diagnostic tools. It can handle fermionic and bosonic input Green functions, self-energies, or correlation functions, both in Matsubara frequency or imaginary time, and with arbitrary covariance. All aspects of the implementation critical for accuracy and speed are optimized using specific numerical methods. A new way of choosing the optimal value of the entropy weight $\\alpha$ is also introduced. It is based on the identification of three different regimes in the value of $\\chi^2$ as a function of $\\alpha$: Large values of $\\alpha$...

  19. Hydrodynamic equations for electrons in graphene obtained from the maximum entropy principle

    SciTech Connect (OSTI)

    Barletti, Luigi

    2014-08-15

    The maximum entropy principle is applied to the formal derivation of isothermal, Euler-like equations for semiclassical fermions (electrons and holes) in graphene. After proving general mathematical properties of the equations so obtained, their asymptotic form corresponding to significant physical regimes is investigated. In particular, the diffusive regime, the Maxwell-Boltzmann regime (high temperature), the collimation regime and the degenerate gas limit (vanishing temperature) are considered.

  20. REMARKS ON THE MAXIMUM ENTROPY METHOD APPLIED TO FINITE TEMPERATURE LATTICE QCD.

    SciTech Connect (OSTI)

    UMEDA, T.; MATSUFURU, H.

    2005-07-25

    We make remarks on the Maximum Entropy Method (MEM) for studies of the spectral function of hadronic correlators in finite temperature lattice QCD. We discuss the virtues and subtlety of MEM in the cases that one does not have enough number of data points such as at finite temperature. Taking these points into account, we suggest several tests which one should examine to keep the reliability for the results, and also apply them using mock and lattice QCD data.

  1. Direct tests of micro channel plates as the active element of a new shower maximum detector

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

    Ronzhin, A.; Los, S.; Ramberg, E.; Apresyan, A.; Xie, S.; Spiropulu, M.; Kim, H.

    2015-05-22

    We continue the study of micro channel plates (MCP) as the active element of a shower maximum (SM) detector. We present below test beam results obtained with MCPs detecting directly secondary particles of an electromagnetic shower. The MCP efficiency to shower particles is close to 100%. In conclusion, the time resolution obtained for this new type of the SM detector is at the level of 40 ps.

  2. Global convergence of diluted iterations in maximum-likelihood quantum tomography

    E-Print Network [OSTI]

    D. S. Gonçalves; M. A. Gomes-Ruggiero; C. Lavor

    2013-06-13

    In this paper we present an inexact stepsize selection for the Diluted R\\rho R algorithm, used to obtain the maximum likelihood estimate to the density matrix in quantum state tomography. We give a new interpretation for the diluted R\\rho R iterations that allows us to prove the global convergence under weaker assumptions. Thus, we propose a new algorithm which is globally convergent and suitable for practical implementation.

  3. Evaluation of Hot Water Wash Parameters to Achieve Maximum Effectiveness in Reducing Levels of Salmonella Typhimurium, Escherichia coli O157:H7 and coliforms/Escherichia coli on Beef Carcass Surfaces 

    E-Print Network [OSTI]

    Davidson, Melissa A.

    2010-07-14

    This study measured and compared different temperatures and dwell times of hot water treatment on the reduction of Escherichia coli O157:H7 and Salmonella Typhimurium on beef carcass surfaces. Two different types of beef ...

  4. Financing Vogtle: A Major Achievement for the Loan Programs Office |

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematics And StatisticsProgramof-SA-02:InnovativeEnergyControl TableEnergy

  5. An effective ALARA (As Low As Reasonably Achievable) Awareness Program

    SciTech Connect (OSTI)

    Aldridge, T.L.; Hammond, D.A.

    1990-10-01

    Following the January 1, 1989 issue of the US Department of Energy (DOE) revised Order 5480.1, Chapter XI (DOE 1985), the Westinghouse Hanford Company (Westinghouse Hanford) As Low As Reasonably Achievable (ALARA) Program Office (APO) began an aggressive ALARA Awareness Campaign. The revised DOE Order 5480.11 (DOE 1988) required the documentation and tracking of ALARA practices and principles. This major challenge for compliance to the new requirements necessitated an enhanced awareness of the goals and objectives of the APO. The Westinghouse Hanford APO began the expansion of the ALARA Program. The classic concept'' of radiological exposure minimization, which began in the early 1940's, increased in scope to include the new concept of exposure minimization for all hazardous materials and conditions commensurate with sound economics and operating practices. This expansion could only be implemented by bringing about a cultural change. Therefore, the attempt to introduce this change in thinking created a second major challenge for the Westinghouse Hanford APO. The direct result of the identification of these two major goals was the creation of an effective ALARA Awareness for Westinghouse Hanford. This paper describes this program. 3 refs.

  6. Composite Multilinearity, Epistemic Uncertainty and Risk Achievement Worth

    SciTech Connect (OSTI)

    E. Borgonovo; C. L. Smith

    2012-10-01

    Risk Achievement Worth is one of the most widely utilized importance measures. RAW is defined as the ratio of the risk metric value attained when a component has failed over the base case value of the risk metric. Traditionally, both the numerator and denominator are point estimates. Relevant literature has shown that inclusion of epistemic uncertainty i) induces notable variability in the point estimate ranking and ii) causes the expected value of the risk metric to differ from its nominal value. We obtain the conditions under which the equality holds between the nominal and expected values of a reliability risk metric. Among these conditions, separability and state-of-knowledge independence emerge. We then study how the presence of epistemic uncertainty aspects RAW and the associated ranking. We propose an extension of RAW (called ERAW) which allows one to obtain a ranking robust to epistemic uncertainty. We discuss the properties of ERAW and the conditions under which it coincides with RAW. We apply our findings to a probabilistic risk assessment model developed for the safety analysis of NASA lunar space missions.

  7. Multiphase Nano-Composite Coatings for Achieving Energy Optimization

    SciTech Connect (OSTI)

    Dr. Jose Nainaparampil

    2012-03-26

    UES Inc. and ANL teamed in this work to develop novel coating systems for the protection of surfaces from thermal degradation mainly in two applications; Machining and Die casting. These coatings were specifically designed for the purpose by incorporating required material phases and the overall architecture, which led to reduce the energy usage and increase efficiency of the operations. Following the UES/ANL'Â?s feasibility work, the coatings were developed utilizing High power impulse magnetron sputtering (HiPMS) and Large area filtered arc deposition (LAFAD) techniques. Toughness, hardness and oxidation resistance: contrasting qualities have been mixed in the right proportion to attain the suitable material characteristic for the cause. Hafnium diboride (HfB2) based materials provided such a system and its properties were tamed to attain the right combination of toughness and hardness by working on the microstructure and architecture of coatings. An effective interfacing material (graded concentrations of topcoat) was also achieved in this work to provide the required adhesion between the substrate and the coating. Combination of an appropriate bond coat and a functional top coat provided the present thermal degradation resistant coating for cutting tools and die-casting applications. Laboratory level performance tests and industrial level application tests by partner companies (Beta Site Testing) were used for the development of these coatings.

  8. Digitally controlled distributed phase shifter

    DOE Patents [OSTI]

    Hietala, V.M.; Kravitz, S.H.; Vawter, G.A.

    1993-08-17

    A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one or two discrete bias voltages. The application of the discrete bias voltages changes the modal index of a portion of the waveguide that corresponds to a length of the electrode to which the bias voltage is applied, thereby causing the phase to change through the underlying portion of the waveguide. The digitally controlled distributed phase shift network has a total phase shift comprised of the sum of the individual phase shifters.

  9. Achieving Transformational Materials Performance in a New Era of Science

    ScienceCinema (OSTI)

    John Sarrao

    2010-01-08

    The inability of current materials to meet performance requirements is a key stumbling block for addressing grand challenges in energy and national security. Fortunately, materials research is on the brink of a new era - a transition from observation and validation of materials properties to prediction and control of materials performance. In this talk, I describe the nature of the current challenge, the prospects for success, and a specific facility concept, MaRIE, that will provide the needed capabilities to meet these challenges, especially for materials in extreme environments. MaRIE, for Matter-Radiation Interactions in Extremes, is Los Alamos' concept to realize this vision of 21st century materials research. This vision will be realized through enhancements to the current LANSCE accelerator, development of a fourth-generation x-ray light source co-located with the proton accelerator, and a comprehensive synthesis and characterization facility focused on controlling complex materials and the defect/structure link to materials performance.

  10. ON OPTIMAL PEER-TO-PEER TOPOLOGY CONSTRUCTION WITH MAXIMUM PEER BANDWIDTH CONTRIBUTIONS

    E-Print Network [OSTI]

    Li, Baochun

    to high "churn" (depar- ture) rates of peers. Maintenance algorithms for these topolo- gies that the optimization is achieved in a high-churn peer-to-peer network with realistic peer uplink capacities and link the objective of scalability. Furthermore, the op- timized topology is resilient to churn with arbitrary

  11. Vehicles and E85 Stations Needed to Achieve Ethanol Goals

    SciTech Connect (OSTI)

    Greene, David L [ORNL

    2008-01-01

    This paper presents an analysis of the numbers of stations and vehicles necessary to achieve future goals for sales of ethanol fuel (E85). The paper does not analyze issues related to the supply of ethanol which may turn out to be of even greater concern. A model of consumers decisions to purchase E85 versus gasoline based on prices, availability, and refueling frequency is derived and preliminary results for 2010, 2017 and 2030 consistent with the President s 2007 biofuels program goals are presented (1). A limited sensitivity analysis is carried out to indicate key uncertainties in the trade-off between the number of stations and fuels. The analysis indicates that to meet a 2017 goal of 26 billion gallons of E85 sold, on the order of 30% to 80% of all stations may need to offer E85, and that 125 to 200 million flexible fuel vehicles (FFVs) may need to be on the road, even if oil prices remain high. These conclusions are tentative for three reasons: (1) there is considerable uncertainty about key parameter values, such as the price elasticity of choice between E85 and gasoline, (2) the future prices of E85 and gasoline are uncertain; and (3) the method of analysis used is highly aggregated; it does not consider the potential benefits of regional strategies nor the possible existence of market segments predisposed to purchase E85. Nonetheless, the preliminary results indicate that the 2017 biofuels program goals are ambitious and will require a massive effort to produce FFVs and insure widespread availability of E85.

  12. Free kick instead of cross-validation in maximum-likelihood refinement of macromolecular crystal structures

    SciTech Connect (OSTI)

    Pražnikar, Jure [Institute Jožef Stefan, Jamova 39, 1000 Ljubljana (Slovenia); University of Primorska, (Slovenia); Turk, Dušan, E-mail: dusan.turk@ijs.si [Institute Jožef Stefan, Jamova 39, 1000 Ljubljana (Slovenia); Center of Excellence for Integrated Approaches in Chemistry and Biology of Proteins, (Slovenia)

    2014-12-01

    The maximum-likelihood free-kick target, which calculates model error estimates from the work set and a randomly displaced model, proved superior in the accuracy and consistency of refinement of crystal structures compared with the maximum-likelihood cross-validation target, which calculates error estimates from the test set and the unperturbed model. The refinement of a molecular model is a computational procedure by which the atomic model is fitted to the diffraction data. The commonly used target in the refinement of macromolecular structures is the maximum-likelihood (ML) function, which relies on the assessment of model errors. The current ML functions rely on cross-validation. They utilize phase-error estimates that are calculated from a small fraction of diffraction data, called the test set, that are not used to fit the model. An approach has been developed that uses the work set to calculate the phase-error estimates in the ML refinement from simulating the model errors via the random displacement of atomic coordinates. It is called ML free-kick refinement as it uses the ML formulation of the target function and is based on the idea of freeing the model from the model bias imposed by the chemical energy restraints used in refinement. This approach for the calculation of error estimates is superior to the cross-validation approach: it reduces the phase error and increases the accuracy of molecular models, is more robust, provides clearer maps and may use a smaller portion of data for the test set for the calculation of R{sub free} or may leave it out completely.

  13. Dynamics of multi-modes maximum entangled coherent state over amplitude damping channel

    E-Print Network [OSTI]

    A. El Allati; Y. Hassouni; N. Metwally

    2012-02-18

    The dynamics of maximum entangled coherent state travels through an amplitude damping channel is investigated. For small values of the transmissivity rate the travelling state is very fragile to this noise channel, where it suffers from the phase flip error with high probability. The entanglement decays smoothly for larger values of the transmissivity rate and speedily for smaller values of this rate. As the number of modes increases, the travelling state over this noise channel loses its entanglement hastily. The odd and even states vanish at the same value of the field intensity.

  14. Maximum Likelihood method for ultrahigh energy cosmic ray cross correlations with astrophysical sources

    E-Print Network [OSTI]

    Ronnie Jansson; Glennys R. Farrar

    2007-08-20

    We extend the Maximum Likelihood method used by HiRes to study cross correlations between a catalog of candidate astrophysical sources and Ultrahigh Energy Cosmic Rays (UHECRs), to allow for differing source luminosities. Our approach permits individual sources to be ranked according to their likelihood of having emitted the correlated UHECRs. We test both old and new method by simulations for various scenarios. We conclude that there are 9 true correlation between HiRes UHECRs and known BLLacs, with a 6*10^-5 probability of such a correlation arising by chance.

  15. Discrimination of two mixed quantum states with maximum confidence and minimum probability of inconclusive results

    E-Print Network [OSTI]

    Ulrike Herzog

    2009-02-28

    We study an optimized measurement that discriminates two mixed quantum states with maximum confidence for each conclusive result, thereby keeping the overall probability of inconclusive results as small as possible. When the rank of the detection operators associated with the two different conclusive outcomes does not exceed unity we obtain a general solution. As an application, we consider the discrimination of two mixed qubit states. Moreover, for the case of higher-rank detection operators we give a solution for particular states. The relation of the optimized measurement to other discrimination schemes is also discussed.

  16. On the geometrical place formed by the maximum heights of projectile motion with air resistance

    E-Print Network [OSTI]

    Hernández-Saldaña, H

    2010-01-01

    We present an analysis on the geometrical place formed by the set of maxima of the orbits of a projectile launched in a media with linear drag. Such a place is written in term of the Lambert W function in polar coordinates, confirming the special role played by this function in the problem. In order to characterize it, a study of the curvature is presented in two parameterizations, in terms of the launching angle and in the polar one. The angles of maximum curvature are compared with other important angles in the projectile problem.

  17. A New Maximum-Likelihood Change Estimator for Two-Pass SAR Coherent Change Detection.

    SciTech Connect (OSTI)

    Wahl, Daniel E.; Yocky, David A.; Jakowatz, Charles V,

    2014-09-01

    In this paper, we derive a new optimal change metric to be used in synthetic aperture RADAR (SAR) coherent change detection (CCD). Previous CCD methods tend to produce false alarm states (showing change when there is none) in areas of the image that have a low clutter-to-noise power ratio (CNR). The new estimator does not suffer from this shortcoming. It is a surprisingly simple expression, easy to implement, and is optimal in the maximum-likelihood (ML) sense. The estimator produces very impressive results on the CCD collects that we have tested.

  18. U.S. Maximum Number of Active Crews Engaged in Seismic Surveying (Number of

    Gasoline and Diesel Fuel Update (EIA)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet)DecadeYear Jan3 November18.5 385.5DryMay-15Decade Year-0Elements) Maximum

  19. OFF-GAS MERCURY CONTROL USING SULFUR-IMPREGNATED ACTIVATED CARBON – TEST RESULTS

    SciTech Connect (OSTI)

    Nick Soelberg

    2007-05-01

    Several laboratory and pilot-scale tests since the year 2000 have included demonstrations of off-gas mercury control using fixed bed, sulfur-impregnated activated carbon. These demonstrations have included operation of carbon beds with gas streams containing a wide range of mercury and other gas species concentrations representing off-gas from several U.S. Department of Energy (DOE) mixed waste treatment processes including electrical resistance heated (joule-heated) glass melters, fluidized bed calciners, and fluidized bed steam reformers. Surrogates of various DOE mixed waste streams (or surrogates of offgas from DOE mixed waste streams) including INL “sodium bearing waste” (SBW), liquid “low activity waste” (LAW) from the Pacific Northwest National Laboratory, and liquid waste from Savannah River National Laboratory (“Tank 48H waste”) have been tested. Test results demonstrate mercury control efficiencies up to 99.999%, high enough to comply with the Hazardous Waste (HWC) Combustor Maximum Achievable Control Technology (MACT) standards even when the uncontrolled off-gas mercury concentrations exceed 400,000 ug/dscm (at 7% O2), and confirm carbon bed design parameters for such high efficiencies. Results of several different pilot-scale and engineering-scale test programs performed over several years are presented and compared.

  20. 12.4.7 Parental Notification and Alcohol and Drug Violations 1. Achieving autonomy and acceptance of one's personal responsibility are student development goals

    E-Print Network [OSTI]

    Kunkle, Tom

    12.4.7 Parental Notification and Alcohol and Drug Violations 1. Achieving autonomy and acceptance's violation of any federal, state, or local law, or an institutional disciplinary policy relating to the use or local law or College policy governing the use or possession of alcohol or a controlled substance. #12;

  1. 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)

    1998-07-01

    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.

  2. Bounds and phase diagram of efficiency at maximum power for tight-coupling molecular motors

    E-Print Network [OSTI]

    Z. C. Tu

    2013-02-08

    The efficiency at maximum power (EMP) for tight-coupling molecular motors is investigated within the framework of irreversible thermodynamics. It is found that the EMP depends merely on the constitutive relation between the thermodynamic current and force. The motors are classified into four generic types (linear, superlinear, sublinear, and mixed types) according to the characteristics of the constitutive relation, and then the corresponding ranges of the EMP for these four types of molecular motors are obtained. The exact bounds of the EMP are derived and expressed as the explicit functions of the free energy released by the fuel in each motor step. A phase diagram is constructed which clearly shows how the region where the parameters (the load distribution factor and the free energy released by the fuel in each motor step) are located can determine whether the value of the EMP is larger or smaller than 1/2. This phase diagram reveals that motors using ATP as fuel under physiological conditions can work at maximum power with higher efficiency ($>1/2$) for a small load distribution factor ($<0.1$).

  3. A Fast Parallel Maximum Clique Algorithm for Large Sparse Graphs and Temporal Strong Components

    E-Print Network [OSTI]

    Rossi, Ryan A; Gebremedhin, Assefaw H; Patwary, Md Mostofa Ali

    2013-01-01

    We propose a fast, parallel, maximum clique algorithm for large, sparse graphs that is designed to exploit characteristics of social and information networks. We observe roughly linear runtime scaling over graphs between 1000 vertices and 100M vertices. In a test with a 1.8 billion-edge social network, the algorithm finds the largest clique in about 20 minutes. For social networks, in particular, we found that using the core number of a vertex in combination with a good heuristic clique finder efficiently removes the vast majority of the search space. In addition, we parallelize the exploration of the search tree. In the algorithm, processes immediately communicate changes to upper and lower bounds on the size of maximum clique, which occasionally results in a super-linear speedup because vertices with especially large search spaces can be pruned by other processes. We use this clique finder to investigate the size of the largest temporal strong components in dynamic networks, which requires finding the large...

  4. Analysis to determine the maximum dimensions of flexible apertures in sensored security netting products.

    SciTech Connect (OSTI)

    Murton, Mark; Bouchier, Francis A.; vanDongen, Dale T.; Mack, Thomas Kimball; Cutler, Robert Paul; Ross, Michael P.

    2013-08-01

    Although technological advances provide new capabilities to increase the robustness of security systems, they also potentially introduce new vulnerabilities. New capability sometimes requires new performance requirements. This paper outlines an approach to establishing a key performance requirement for an emerging intrusion detection sensor: the sensored net. Throughout the security industry, the commonly adopted standard for maximum opening size through barriers is a requirement based on square inches-typically 96 square inches. Unlike standard rigid opening, the dimensions of a flexible aperture are not fixed, but variable and conformable. It is demonstrably simple for a human intruder to move through a 96-square-inch opening that is conformable to the human body. The longstanding 96-square-inch requirement itself, though firmly embedded in policy and best practice, lacks a documented empirical basis. This analysis concluded that the traditional 96-square-inch standard for openings is insufficient for flexible openings that are conformable to the human body. Instead, a circumference standard is recommended for these newer types of sensored barriers. The recommended maximum circumference for a flexible opening should be no more than 26 inches, as measured on the inside of the netting material.

  5. Development of a Testbed for Robotic Neuromuscular Controllers

    E-Print Network [OSTI]

    Geyer, Hartmut

    corresponding to 87% of the maximum performance limit of human muscle. The experiments also reveal limitations. Central control is not available to robotic assistive devices that integrate with humans, and matching and low level, velocity-based torque control. Additionally, we present experiments that test the leg

  6. Hybrid optimal control Notes for CIRA course, Bertinoro 2003.

    E-Print Network [OSTI]

    Piccoli, Benedetto

    Hybrid optimal control Notes for CIRA course, Bertinoro 2003. Benedetto Piccoli # Abstract. These notes are devoted to the use of some analytical tools for hybrid optimal control. After introducing basic notations for a quite general class of hybrid systems, we state both the Hybrid Maximum Principle

  7. The role of opacity and transparency in achieving strategic stability in South Asia.

    SciTech Connect (OSTI)

    Rajain, Arpit (New Delhi, India); Ashraf, Tariq Mahmud (Islamabad, Pakistan)

    2005-08-01

    According to international relations theory, deterrence can be used as a tool to achieve stability between potentially hostile nations. India and Pakistan's long history of periodic crises raises the question of how they can achieve deterrence stability. 'Transparency' describes the flow of information between parties and plays a key role in establishing a deterrence relationship. This paper studies the balance needed between opacity and transparency in nuclear topics for the maintenance of deterrence stability between India and Pakistan. States with nuclear weapons are postulated to implement transparency in four categories: potential, capability, intent, and resolve. The study applies these categories to the nuclear components of the ongoing India-Pakistan Composite Dialogue Working Group for Peace and Security including CBMs. To focus our efforts, we defined four scenarios to characterize representative strategic/military/political conditions. The scenarios are combinations of these two sets of opposite poles: competition - cooperation; extremism - moderation (to be understood primarily in a religious/nationalistic sense). We describe each scenario in terms of select focal areas (nuclear doctrine, nuclear command and control, nuclear stockpile, nuclear delivery/defensive systems, and conventional force posture). The scenarios help frame the realm of possibilities, and have been described in terms of expected conditions for the focal areas. We then use the conditions in each scenario to prescribe a range of information-sharing actions that the two countries could take to increase stability. We also highlight the information that should not be shared. These actions can be political (e.g., declarations), procedural (e.g., advance notice of certain military activities), or technologically based (e.g., seismic monitoring of the nuclear test moratorium).

  8. Project Controls

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-03-28

    Project controls are systems used to plan, schedule, budget, and measure the performance of a project/program. The cost estimation package is one of the documents that is used to establish the baseline for project controls. This chapter gives a brief description of project controls and the role the cost estimation package plays.

  9. First-ever ieRoadmap Workshop Reviews Progress in Achieving Roadmap...

    Energy Savers [EERE]

    First-ever ieRoadmap Workshop Reviews Progress in Achieving Roadmap Goals First-ever ieRoadmap Workshop Reviews Progress in Achieving Roadmap Goals On May 28-29, 2008, the first...

  10. Achieving high-precision ground-based photometry for transiting exoplanets

    E-Print Network [OSTI]

    Guyon, Olivier

    Achieving high-precision ground-based photometry for transiting exoplanets Olivier Guyona, USA ABSTRACT Detection of transiting exoplanets requires high precision photometry, at the percent an ideally stable - but costly - environment for high precision photometry. Achieving high precision

  11. The Relationship Between the Leadership Responsibilities of Title I School Principals and Student Achievement 

    E-Print Network [OSTI]

    Sheldon, George H.

    2010-07-14

    achievement. The overall indication is that a substantial relationship exists between the 21 Leadership responsibilities and combination reading and math averages. Fourteen leadership responsibilities were positively correlated to the overall achievement...

  12. Policy Flash 2014-39 Initiatives to Achieve Strategic Plan 2014...

    Energy Savers [EERE]

    to Achieve Strategic Plan 2014-2018 Performance Goal Focused on Cost Savings Policy Flash 2014-39 Initiatives to Achieve Strategic Plan 2014-2018 Performance Goal Focused...

  13. Achievement and Opportunity Gaps in Mathematics Education in Turkey Compared to European Union Countries 

    E-Print Network [OSTI]

    Yetkiner, Zeynep 1978-

    2010-12-08

    in the present study as more equitable in terms of student achievement than Turkey. The current study also shows Turkish policy-makers importance of the equitable distribution of qualified mathematics teachers in closing the mathematics achievement gap in middle...

  14. Hybrid powertrain controller

    DOE Patents [OSTI]

    Jankovic, Miroslava (Birmingham, MI); Powell, Barry Kay (Belleville, MI)

    2000-12-26

    A hybrid powertrain for a vehicle comprising a diesel engine and an electric motor in a parallel arrangement with a multiple ratio transmission located on the torque output side of the diesel engine, final drive gearing connecting drivably the output shaft of transmission to traction wheels of the vehicle, and an electric motor drivably coupled to the final drive gearing. A powertrain controller schedules fuel delivered to the diesel engine and effects a split of the total power available, a portion of the power being delivered by the diesel and the balance of the power being delivered by the motor. A shifting schedule for the multiple ratio transmission makes it possible for establishing a proportional relationship between accelerator pedal movement and torque desired at the wheels. The control strategy for the powertrain maintains drivability of the vehicle that resembles drivability of a conventional spark ignition vehicle engine powertrain while achieving improved fuel efficiency and low exhaust gas emissions.

  15. The Role of Mediators in the Development of Longitudinal Mathematics Achievement Associations

    E-Print Network [OSTI]

    2015-01-01

    mis) alignment between mathematics instructional content andof high school mathematics achievement. Psychologicalis where you start? Early mathematics knowledge and later

  16. Achieving gender equality in learning outcomes: Evidence from a non-formal education program in Bangladesh

    E-Print Network [OSTI]

    Gee, Kevin A

    2015-01-01

    education on girls’ achievement and only one examines gender differences in the context of Yemen’s early childhood

  17. Robustness of Controlled Quantum Dynamics

    E-Print Network [OSTI]

    Andy Koswara; Raj Chakrabarti

    2014-09-29

    Control of multi-level quantum systems is sensitive to implementation errors in the control field and uncertainties associated with system Hamiltonian parameters. A small variation in the control field spectrum or the system Hamiltonian can cause an otherwise optimal field to deviate from controlling desired quantum state transitions and reaching a particular objective. An accurate analysis of robustness is thus essential in understanding and achieving model-based quantum control, such as in control of chemical reactions based on ab initio or experimental estimates of the molecular Hamiltonian. In this paper, theoretical foundations for quantum control robustness analysis are presented from both a distributional perspective - in terms of moments of the transition amplitude, interferences, and transition probability - and a worst-case perspective. Based on this theory, analytical expressions and a computationally efficient method for determining the robustness of coherently controlled quantum dynamics are derived. The robustness analysis reveals that there generally exists a set of control pathways that are more resistant to destructive interferences in the presence of control field and system parameter uncertainty. These robust pathways interfere and combine to yield a relatively accurate transition amplitude and high transition probability when uncertainty is present.

  18. Contactless heat flux control with photonic devices

    E-Print Network [OSTI]

    Ben-Abdallah, Philippe

    2015-01-01

    The ability to control electric currents in solids using diodes and transistors is undoubtedly at the origin of the main developments in modern electronics which have revolutionized the daily life in the second half of 20th century. Surprisingly, until the year 2000 no thermal counterpart for such a control had been proposed. Since then, based on pioneering works on the control of phononic heat currents new devices were proposed which allow for the control of heat fluxes carried by photons rather than phonons or electrons. The goal of the present paper is to summarize the main advances achieved recently in the field of thermal energy control with photons.

  19. A 3D approximate maximum likelihood solver for localization of fish implanted with acoustic transmitters

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

    Li, Xinya; Deng, Z. Daniel; USA, Richland Washington; Sun, Yannan; USA, Richland Washington; Martinez, Jayson J.; USA, Richland Washington; Fu, Tao; USA, Richland Washington; McMichael, Geoffrey A.; et al

    2014-11-27

    Better understanding of fish behavior is vital for recovery of many endangered species including salmon. The Juvenile Salmon Acoustic Telemetry System (JSATS) was developed to observe the out-migratory behavior of juvenile salmonids tagged by surgical implantation of acoustic micro-transmitters and to estimate the survival when passing through dams on the Snake and Columbia Rivers. A robust three-dimensional solver was needed to accurately and efficiently estimate the time sequence of locations of fish tagged with JSATS acoustic transmitters, to describe in sufficient detail the information needed to assess the function of dam-passage design alternatives. An approximate maximum likelihood solver was developedmore »using measurements of time difference of arrival from all hydrophones in receiving arrays on which a transmission was detected. Field experiments demonstrated that the developed solver performed significantly better in tracking efficiency and accuracy than other solvers described in the literature.« less

  20. Lyapunov exponent and natural invariant density determination of chaotic maps: An iterative maximum entropy ansatz

    E-Print Network [OSTI]

    Parthapratim Biswas; H. Shimoyama; L. R. Mead

    2009-10-23

    We apply the maximum entropy principle to construct the natural invariant density and Lyapunov exponent of one-dimensional chaotic maps. Using a novel function reconstruction technique that is based on the solution of Hausdorff moment problem via maximizing Shannon entropy, we estimate the invariant density and the Lyapunov exponent of nonlinear maps in one-dimension from a knowledge of finite number of moments. The accuracy and the stability of the algorithm are illustrated by comparing our results to a number of nonlinear maps for which the exact analytical results are available. Furthermore, we also consider a very complex example for which no exact analytical result for invariant density is available. A comparison of our results to those available in the literature is also discussed.

  1. Detailed analysis of an endoreversible fuel cell : Maximum power and optimal operating temperature determination

    E-Print Network [OSTI]

    A. Vaudrey; P. Baucour; F. Lanzetta; R. Glises

    2010-08-30

    Producing useful electrical work in consuming chemical energy, the fuel cell have to reject heat to its surrounding. However, as it occurs for any other type of engine, this thermal energy cannot be exchanged in an isothermal way in finite time through finite areas. As it was already done for various types of systems, we study the fuel cell within the finite time thermodynamics framework and define an endoreversible fuel cell. Considering different types of heat transfer laws, we obtain an optimal value of the operating temperature, corresponding to a maximum produced power. This analysis is a first step of a thermodynamical approach of design of thermal management devices, taking into account performances of the whole system.

  2. Detailed analysis of an endoreversible fuel cell : Maximum power and optimal operating temperature determination

    E-Print Network [OSTI]

    Vaudrey, A; Lanzetta, F; Glises, R

    2009-01-01

    Producing useful electrical work in consuming chemical energy, the fuel cell have to reject heat to its surrounding. However, as it occurs for any other type of engine, this thermal energy cannot be exchanged in an isothermal way in finite time through finite areas. As it was already done for various types of systems, we study the fuel cell within the finite time thermodynamics framework and define an endoreversible fuel cell. Considering different types of heat transfer laws, we obtain an optimal value of the operating temperature, corresponding to a maximum produced power. This analysis is a first step of a thermodynamical approach of design of thermal management devices, taking into account performances of the whole system.

  3. A 3D approximate maximum likelihood solver for localization of fish implanted with acoustic transmitters

    SciTech Connect (OSTI)

    Li, Xinya; Deng, Z. Daniel; USA, Richland Washington; Sun, Yannan; USA, Richland Washington; Martinez, Jayson J.; USA, Richland Washington; Fu, Tao; USA, Richland Washington; McMichael, Geoffrey A.; USA, Richland Washington; Carlson, Thomas J.; USA, Richland Washington

    2014-11-27

    Better understanding of fish behavior is vital for recovery of many endangered species including salmon. The Juvenile Salmon Acoustic Telemetry System (JSATS) was developed to observe the out-migratory behavior of juvenile salmonids tagged by surgical implantation of acoustic micro-transmitters and to estimate the survival when passing through dams on the Snake and Columbia Rivers. A robust three-dimensional solver was needed to accurately and efficiently estimate the time sequence of locations of fish tagged with JSATS acoustic transmitters, to describe in sufficient detail the information needed to assess the function of dam-passage design alternatives. An approximate maximum likelihood solver was developed using measurements of time difference of arrival from all hydrophones in receiving arrays on which a transmission was detected. Field experiments demonstrated that the developed solver performed significantly better in tracking efficiency and accuracy than other solvers described in the literature.

  4. Predicting Whole Forest Structure, Primary Productivity, and Biomass Density From Maximum Tree Size and Resource Limitations

    E-Print Network [OSTI]

    Kempes, Christopher P; Dooris, William; West, Geoffrey B

    2015-01-01

    In the face of uncertain biological response to climate change and the many critiques concerning model complexity it is increasingly important to develop predictive mechanistic frameworks that capture the dominant features of ecological communities and their dependencies on environmental factors. This is particularly important for critical global processes such as biomass changes, carbon export, and biogenic climate feedback. Past efforts have successfully understood a broad spectrum of plant and community traits across a range of biological diversity and body size, including tree size distributions and maximum tree height, from mechanical, hydrodynamic, and resource constraints. Recently it was shown that global scaling relationships for net primary productivity are correlated with local meteorology and the overall biomass density within a forest. Along with previous efforts, this highlights the connection between widely observed allometric relationships and predictive ecology. An emerging goal of ecological...

  5. Thirty-Year Solid Waste Generation Maximum and Minimum Forecast for SRS

    SciTech Connect (OSTI)

    Thomas, L.C.

    1994-10-01

    This report is the third phase (Phase III) of the Thirty-Year Solid Waste Generation Forecast for Facilities at the Savannah River Site (SRS). Phase I of the forecast, Thirty-Year Solid Waste Generation Forecast for Facilities at SRS, forecasts the yearly quantities of low-level waste (LLW), hazardous waste, mixed waste, and transuranic (TRU) wastes generated over the next 30 years by operations, decontamination and decommissioning and environmental restoration (ER) activities at the Savannah River Site. The Phase II report, Thirty-Year Solid Waste Generation Forecast by Treatability Group (U), provides a 30-year forecast by waste treatability group for operations, decontamination and decommissioning, and ER activities. In addition, a 30-year forecast by waste stream has been provided for operations in Appendix A of the Phase II report. The solid wastes stored or generated at SRS must be treated and disposed of in accordance with federal, state, and local laws and regulations. To evaluate, select, and justify the use of promising treatment technologies and to evaluate the potential impact to the environment, the generic waste categories described in the Phase I report were divided into smaller classifications with similar physical, chemical, and radiological characteristics. These smaller classifications, defined within the Phase II report as treatability groups, can then be used in the Waste Management Environmental Impact Statement process to evaluate treatment options. The waste generation forecasts in the Phase II report includes existing waste inventories. Existing waste inventories, which include waste streams from continuing operations and stored wastes from discontinued operations, were not included in the Phase I report. Maximum and minimum forecasts serve as upper and lower boundaries for waste generation. This report provides the maximum and minimum forecast by waste treatability group for operation, decontamination and decommissioning, and ER activities.

  6. Compensated gain control circuit for buck regulator command charge circuit

    DOE Patents [OSTI]

    Barrett, David M. (Albuquerque, NM)

    1996-01-01

    A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit.

  7. Compensated gain control circuit for buck regulator command charge circuit

    DOE Patents [OSTI]

    Barrett, D.M.

    1996-11-05

    A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit. 5 figs.

  8. Physically constrained maximum likelihood (PCML) mode filtering and its application as a pre-processing method for underwater acoustic communication

    E-Print Network [OSTI]

    Papp, Joseph C

    2009-01-01

    Mode filtering is most commonly implemented using the sampled mode shape or pseudoinverse algorithms. Buck et al [1] placed these techniques in the context of a broader maximum a posteriori (MAP) framework. However, the ...

  9. ESTIMATE OF SOLAR MAXIMUM USING THE 1-8 Å GEOSTATIONARY OPERATIONAL ENVIRONMENTAL SATELLITES X-RAY MEASUREMENTS

    SciTech Connect (OSTI)

    Winter, L. M.; Balasubramaniam, K. S.

    2014-10-01

    We present an alternate method of determining the progression of the solar cycle through an analysis of the solar X-ray background. Our results are based on the NOAA Geostationary Operational Environmental Satellites (GOES) X-ray data in the 1-8 Å band from 1986 to the present, covering solar cycles 22, 23, and 24. The X-ray background level tracks the progression of the solar cycle through its maximum and minimum. Using the X-ray data, we can therefore make estimates of the solar cycle progression and the date of solar maximum. Based upon our analysis, we conclude that the Sun reached its hemisphere-averaged maximum in solar cycle 24 in late 2013. This is within six months of the NOAA prediction of a maximum in spring 2013.

  10. Estimate of Solar Maximum using the 1-8 \\AA$\\,$Geostationary Operational Environmental Satellites X-ray Measurements

    E-Print Network [OSTI]

    Winter, L M

    2014-01-01

    We present an alternate method of determining the progression of the solar cycle through an analysis of the solar X-ray background. Our results are based on the NOAA Geostationary Operational Environmental Satellites (GOES) X-ray data in the 1-8 \\AA$\\,$band from 1986 - present, covering solar cycles 22, 23, and 24. The X-ray background level tracks the progression of the solar cycle through its maximum and minimum. Using the X-ray data, we can therefore make estimates of the solar cycle progression and date of solar maximum. Based upon our analysis, we conclude that the Sun reached its hemisphere-averaged maximum in Solar Cycle 24 in late 2013. This is within six months of the NOAA prediction of a maximum in Spring 2013.

  11. Flea Control 

    E-Print Network [OSTI]

    Merchant, Michael E.

    2002-08-23

    This publication will help you identify fleas and learn their behaviors and potential dangers to pets and humans. Included are methods for controlling fleas indoors and out....

  12. Tick Control 

    E-Print Network [OSTI]

    Merchant, Michael E.

    2002-08-23

    This publication will help you identify ticks and learn their behaviors and potential dangers. Included are methods for avoiding, controlling and removing ticks....

  13. Mercury control in 2009

    SciTech Connect (OSTI)

    Sjostrom, S.; Durham, M.; Bustard, J.; Martin, C.

    2009-07-15

    Although activated carbon injection (ACI) has been proven to be effective for many configurations and is a preferred option at many plants sufficient quantities of powdered activated coking (PAC) must be available to meet future needs. The authors estimate that upcoming federal and state regulations will result in tripling the annual US demand for activated carbon to nearly 1.5 billion lb from approximately 450 million lb. Rapid expansion of US production capacity is required. Many PAC manufacturers are discussing expansion of their existing production capabilities. One company, ADA Carbon Solutions, is in the process of constructing the largest activated carbon facility in North America to meet the future demand for PAC as a sorbent for mercury control. Emission control technology development and commercialization is driven by regulation and legislation. Although ACI will not achieve > 90% mercury control at every plant, the expected required MACT legislation level, it offers promise as a low-cost primary mercury control technology option for many configurations and an important trim technology for others. ACI has emerged as the clear mercury-specific control option of choice, representing over 98% of the commercial mercury control system orders to date. As state regulations are implemented and the potential for a federal rule becomes more imminent, suppliers are continuing to develop technologies to improve the cost effectiveness and limit the balance of plant impacts associated with ACI and are developing additional PAC production capabilities to ensure that the industry's needs are met. The commercialisation of ACI is a clear example of industry, through the dedication of many individuals and companies with support from the DOE and EPRI, meeting the challenge of developing cost-effectively reducing emissions from coal-fired power plants. 7 refs., 1 fig.

  14. China's Pathways to Achieving 40% ~ 45% Reduction in CO{sub 2} Emissions per Unit of GDP in 2020: Sectoral Outlook and Assessment of Savings Potential

    SciTech Connect (OSTI)

    Zheng, Nina; Fridley, David; Zhou, Nan; Levine, Mark; Price, Lynn; Ke, Jing

    2011-09-30

    Achieving China’s goal of reducing its carbon intensity (CO{sub 2} per unit of GDP) by 40% to 45% percent below 2005 levels by 2020 will require the strengthening and expansion of energy efficiency policies across the buildings, industries and transport sectors. This study uses a bottom-up, end-use model and two scenarios -- an enhanced energy efficiency (E3) scenario and an alternative maximum technically feasible energy efficiency improvement (Max Tech) scenario – to evaluate what policies and technical improvements are needed to achieve the 2020 carbon intensity reduction target. The findings from this study show that a determined approach by China can lead to the achievement of its 2020 goal. In particular, with full success in deepening its energy efficiency policies and programs but following the same general approach used during the 11th Five Year Plan, it is possible to achieve 49% reduction in CO{sub 2} emissions per unit of GDP (CO{sub 2} emissions intensity) in 2020 from 2005 levels (E3 case). Under the more optimistic but feasible assumptions of development and penetration of advanced energy efficiency technology (Max Tech case), China could achieve a 56% reduction in CO{sub 2} emissions intensity in 2020 relative to 2005 with cumulative reduction of energy use by 2700 Mtce and of CO{sub 2} emissions of 8107 Mt CO{sub 2} between 2010 and 2020. Energy savings and CO{sub 2} mitigation potential varies by sector but most of the energy savings potential is found in energy-intensive industry. At the same time, electricity savings and the associated emissions reduction are magnified by increasing renewable generation and improving coal generation efficiency, underscoring the dual importance of end-use efficiency improvements and power sector decarbonization.

  15. Feasibility of Achieving a Zero-Net-Energy, Zero-Net-Cost Homes

    E-Print Network [OSTI]

    Al-Beaini, S.

    2010-01-01

    of  houses built to current standards.   Passive House: Passive houses typically require a maximum of 10 W/m2 of were provided with passive house frames and have triple 

  16. Mirror with thermally controlled radius of curvature

    DOE Patents [OSTI]

    Neil, George R.; Shinn, Michelle D.

    2010-06-22

    A radius of curvature controlled mirror for controlling precisely the focal point of a laser beam or other light beam. The radius of curvature controlled mirror provides nearly spherical distortion of the mirror in response to differential expansion between the front and rear surfaces of the mirror. The radius of curvature controlled mirror compensates for changes in other optical components due to heating or other physical changes. The radius of curvature controlled mirror includes an arrangement for adjusting the temperature of the front surface and separately adjusting the temperature of the rear surface to control the radius of curvature. The temperature adjustment arrangements can include cooling channels within the mirror body or convection of a gas upon the surface of the mirror. A control system controls the differential expansion between the front and rear surfaces to achieve the desired radius of curvature.

  17. The extraction of a mono-energetic neutron beam of maximum intensity from a nuclear reactor 

    E-Print Network [OSTI]

    Snow, Edward Clark

    1965-01-01

    of the tube at which the 40 cut was made. This plate was later to be welded into place to seal this end of the tube. A 3/4" aluminum flange to fit on the end of the beam-port was constructed from specifications supplied by the Nuclear Science Center... framework support. 19 20 10. Servo control system. 25 12. Servo control system for two rotations. Servo amplifier 26 27 LIST OF PICTURES PAGE Collimator in shielding plug. Extension tube. 7" silicon crystal in aluminum holder. Crystal, support...

  18. A class of unambiguous state discrimination problems achievable by separable measurements but impossible by local operations and classical communication

    E-Print Network [OSTI]

    Scott M. Cohen

    2014-12-03

    We consider an infinite class of unambiguous quantum state discrimination problems on multipartite systems, described by Hilbert space $\\cal{H}$, of any number of parties. Restricting consideration to measurements that act only on $\\cal{H}$, we find the optimal global measurement for each element of this class, achieving the maximum possible success probability of $1/2$ in all cases. This measurement turns out to be both separable and unique, and by our recently discovered necessary condition for local quantum operations and classical communication (LOCC), it is easily shown to be impossible by any finite-round LOCC protocol. We also show that, quite generally, if the input state is restricted to lie in $\\cal{H}$, then any LOCC measurement on an enlarged Hilbert space is effectively identical to an LOCC measurement on $\\cal{H}$. Therefore, our necessary condition for LOCC demonstrates directly that a higher success probability is attainable for each of these problems using general separable measurements as compared to that which is possible with any finite-round LOCC protocol.

  19. Water/Icy Super-Earths: Giant Impacts and Maximum Water Content

    E-Print Network [OSTI]

    Marcus, Robert A; Stewart, Sarah T; Hernquist, Lars

    2010-01-01

    Water-rich super-Earth exoplanets are expected to be common. We explore the effect of late giant impacts on the final bulk abundance of water in such planets. We present the results from smoothed particle hydrodynamics simulations of impacts between differentiated water(ice)-rock planets with masses between 0.5 and 5 M_Earth and projectile to target mass ratios from 1:1 to 1:4. We find that giant impacts between bodies of similar composition never decrease the bulk density of the target planet. If the commonly assumed maximum water fraction of 75wt% for bodies forming beyond the snow line is correct, giant impacts between similar composition bodies cannot serve as a mechanism for increasing the water fraction. Target planets either accrete materials in the same proportion, leaving the water fraction unchanged, or lose material from the water mantle, decreasing the water fraction. The criteria for catastrophic disruption of water-rock planets are similar to those found in previous work on super-Earths of terre...

  20. Large deviations of the maximum of independent and identically distributed random variables

    E-Print Network [OSTI]

    Pierpaolo Vivo

    2015-07-20

    A pedagogical account of some aspects of Extreme Value Statistics (EVS) is presented from the somewhat non-standard viewpoint of Large Deviation Theory. We address the following problem: given a set of $N$ i.i.d. random variables $\\{X_1,\\ldots,X_N\\}$ drawn from a parent probability density function (pdf) $p(x)$, what is the probability that the maximum value of the set $X_{\\mathrm{max}}=\\max_i X_i$ is "atypically larger" than expected? The cases of exponential and Gaussian distributed variables are worked out in detail, and the right rate function for a general pdf in the Gumbel basin of attraction is derived. The Gaussian case convincingly demonstrates that the full rate function cannot be determined from the knowledge of the limiting distribution (Gumbel) alone, thus implying that it indeed carries additional information. Given the simplicity and richness of the result and its derivation, its absence from textbooks, tutorials and lecture notes on EVS for physicists appears inexplicable.

  1. Parametric study on maximum transportable distance and cost for thermal energy transportation using various coolants

    SciTech Connect (OSTI)

    Su-Jong Yoon; Piyush Sabharwall

    2014-07-01

    The operation temperature of advanced nuclear reactors is generally higher than commercial light water reactors and thermal energy from advanced nuclear reactor can be used for various purposes such as district heating, desalination, hydrogen production and other process heat applications, etc. The process heat industry/facilities will be located outside the nuclear island due to safety measures. This thermal energy from the reactor has to be transported a fair distance. In this study, analytical analysis was conducted to identify the maximum distance that thermal energy could be transported using various coolants such as molten-salts, helium and water by varying the pipe diameter and mass flow rate. The cost required to transport each coolant was also analyzed. The coolants analyzed are molten salts (such as: KClMgCl2, LiF-NaF-KF (FLiNaK) and KF-ZrF4), helium and water. Fluoride salts are superior because of better heat transport characteristics but chloride salts are most economical for higher temperature transportation purposes. For lower temperature water is a possible alternative when compared with He, because low pressure He requires higher pumping power which makes the process very inefficient and economically not viable for both low and high temperature application.

  2. Nonlinear oscillations of compact stars in the vicinity of the maximum mass configuration

    E-Print Network [OSTI]

    Alessandro Brillante; Igor Mishustin

    2015-07-17

    We solve the dynamical GR equations for the spherically symmetric evolution of compact stars in the vicinity of the maximum mass, for which instability sets in according to linear perturbation theory. The calculations are done with the analytical Zeldovich-like EOS P=a(rho-rho_0) and with the TM1 parametrisation of the RMF model. The initial configurations for the dynamical calculations are represented by spherical stars with equilibrium density profile, which are perturbed by either (i) an artificially added inward velocity field proportional to the radial coordinate, or (ii) a rarefaction corresponding to a static and expanded star. These configurations are evolved using a one-dimensional GR hydro code for ideal and barotropic fluids. Depending on the initial conditions we obtain either stable oscillations or the collapse to a black hole. The minimal amplitude of the perturbation, needed to trigger gravitational collapse is evaluated. The approximate independence of this energy on the type of perturbation is pointed out. At the threshold we find type I critical behaviour for all stellar models considered and discuss the dependence of the time scaling exponent on the baryon mass and EOS.

  3. FIELD CRITERIA FOR SURVIVAL OF ANCHOVY LARVAE: THE RELATION BETWEEN INSHORE CHLOROPHYLL MAXIMUM

    E-Print Network [OSTI]

    along the California coast. First-feeding larval anchovies, whose development was controlled and effectively destroyed this feeding ground of the larval anchovy. Probably the major problem confounding failure (Gulland 1973) despite the vast amount of laboratory and field work on food chain analysis leading

  4. Development and analysis of a small satellite attitude determination and control system testbed

    E-Print Network [OSTI]

    Crowell, Corey Whitcomb

    2011-01-01

    Attitude Determination and Control Systems (ADCS) are critical to the operation of satellites that require attitude knowledge and/or attitude control to achieve mission success. Furthermore, ADCS systems only operate as ...

  5. High load limits of the controlled autoignition engine

    E-Print Network [OSTI]

    Wildman, Craig B. E. (Craig Bradley Edward), 1987-

    2009-01-01

    The controlled autoignition (CAI) engine is an engine concept that features very low soot and NOx emissions while achieving diesel-like efficiency. The CAI combustion process is characterized by a fast, volumetric burn of ...

  6. Practical Application of Distillation Column Energy Control Systems 

    E-Print Network [OSTI]

    Matthews, S. A.

    1980-01-01

    Closed loop computer control of an ethylene column has been shown to save $350/day in improved ethylene recovery and $150/day in reduced energy consumption. These savings are achieved through material balance optimization and energy balance...

  7. An indirect sensing technique for diesel fuel quantity control. Technical progress report, October 1--December 31, 1998

    SciTech Connect (OSTI)

    MacCarley, C.A.

    1999-01-26

    Work has proceeded intensely with the objective of completing the commercial prototype system prior to the end of the contract period. At the time of this report, testing and refinement of the commercial version of the system has not been completed. During this reporting period, several major milestones were reached and many significant lessons were learned. These are described. The experimental retrofit system has achieved all performance objectives in engine dynamometer tests. The prototype commercial version of the system will begin demonstration service on the first of several Santa Maria Area Transit (SMAT) transit buses on February 1, 1999. The commercial system has been redesignated the Electronic Diesel Smoke Reduction System (EDSRS) replacing the original internal pseudonym ADSC. The focus has been narrowed to a retrofit product suitable for installation on existing mechanically-governed diesel engines. Included in this potential market are almost all diesel-powered passenger cars and light trucks manufactured prior to the introduction of the most recent clean diesel engines equipped with particulate traps and electronic controls. Also included are heavy-duty trucks, transit vehicles, school buses, and agricultural equipment. This system is intended to prevent existing diesel engines from overfueling to the point of visible particulate emissions (smoke), while allowing maximum smoke-limited torque under all operating conditions. The system employs a microcontroller and a specialized exhaust particulate emission sensor to regulate the maximum allowable fuel quantity via an adaptive throttle-limit map. This map specifies a maximum allowable throttle position as a function of engine speed, turbocharger boost pressure and engine coolant temperature. The throttle position limit is mechanized via a servo actuator inserted in the throttle cable leading to the injection pump.

  8. Beating the Odds: Encouraging High-Achieving Minority Students in Science and Engineering

    ScienceCinema (OSTI)

    Freeman A. Hrabowski, III

    2010-09-01

    Freeman A. Hrabowski, III, President of the University of Maryland, Baltimore County, focuses on encouraging high-achieving minority students in science and engineering.

  9. Energy Efficiency as a Low-Cost Resource for Achieving Carbon Emissions Reductions

    SciTech Connect (OSTI)

    none,

    2009-09-01

    Summarizes the scale and economic value of energy efficiency for reducing carbon emissions and discusses barriers to achieving the potential for cost-effective energy efficiency.

  10. The role of lean manufacturing principles and strategic alternatives in achieving business goals

    E-Print Network [OSTI]

    Ramaswamy, Dhananjay

    2006-01-01

    Lean Manufacturing is widely accepted as a proven method to achieve operational excellence. Many manufacturers undertake lean manufacturing implementations as a strategy to improve competitiveness and realize business ...

  11. Carrots and Sticks: A Comprehensive Business Model for the Successful Achievement of Energy Efficiency Resource Standards

    E-Print Network [OSTI]

    Satchwell, Andrew

    2013-01-01

    Achievement of Energy Efficiency Resource Standards AndrewEfficiency; EERS=Energy Efficiency Resource Standard; EES=different energy efficiency and demand response resource

  12. Controlling Fleas 

    E-Print Network [OSTI]

    Merchant, Michael E.; Robinson, James V.

    2006-12-18

    . For this reason, avoid close contact with wild rodents such as squirrels, rats and prairie dogs. Their fleas can bite you and may transmit disease. Cat fleas, however, do not carry plague. Control An integrated flea control program includes good sanitation... and treatment of the pet and environment. You can eliminate fleas from your home with proper treatment, but it may take time, especially if the infes- tation is heavy. Sanitation. Change pet bedding regularly and vacuum thoroughly. Vacuuming removes up to 30...

  13. Using the Comoving Maximum of the Galaxy Power Spectrum to Measure Cosmological Curvature

    E-Print Network [OSTI]

    Tom Broadhurst; Andrew H. Jaffe

    1999-04-26

    The large-scale maximum at k~0.05 identified in the power-spectrum of galaxy fluctuations provides a co-moving scale for measuring cosmological curvature. In shallow 3D surveys the peak is broad, but appears to be well resolved in 1D, at ~130 Mpc (k=0.048), comprising evenly spaced peaks and troughs. Surprisingly similar behaviour is evident at z=3 in the distribution of Lyman-break galaxies, for which we find a 5 sigma excess of pairs separated by Delta z=0.22pm0.02, equivalent to 85Mpc for Omega=1, increasing to 170 Mpc for Omega=0, with a number density contrast of 30% averaged over 5 independent fields. The combination, 3.2\\Omega_m -\\Omega_{\\Lambda}=0.7, matches the local scale of 130 Mpc, i.e. Omega=0.2\\pm0.1 or Omega_{m}=0.4\\pm0.1 for the matter-dominated and flat models respectively, with an uncertainty given by the width of the excess correlation. The consistency here of the flat model with SNIa based claims is encouraging, but overshadowed by the high degree of coherence observed in 1D compared with conventional Gaussian models of structure formation. The appearance of this scale at high redshift and its local prominence in the distribution of Abell clusters lends support to claims that the high-z `spikes' represent young clusters. Finally we show that a spike in the primordial power spectrum of delta\\rho/\\rho=0.3 at k=0.05 has little effect on the CMB, except to exaggerate the first Doppler peak in flat matter-dominated models, consistent with recent observations. \\\\effect on the CMB, except to exaggerate the first Doppler peak in flat matter-dominated models, consistent with recent observations.

  14. Leveraging Limited Scope for Maximum Benefit in Occupied Renovation of Uninsulated Cold Climate Multifamily Housing

    SciTech Connect (OSTI)

    Neuhauser, K.; Bergey, D.; Osser, R.

    2012-03-01

    This project examines a large-scale renovation project within a 500 unit, 1960's era subsidized urban housing community. This research focuses on the airflow control and window replacement measures implemented as part of the renovations to the low-rise apartment buildings. The window replacement reduced the nominal conductive loss of the apartment enclosure by approximately 15%; air sealing measures reduced measured air leakage by approximately 40% on average.

  15. Achieving synchrony

    SciTech Connect (OSTI)

    Feldman, R.D. (McDermott, Will Emery, Washington, DC (United States))

    1993-09-01

    Independent power developers, investors, and lenders have the chance to make a difference in how capital markets are structured. These opportunities are complicated by the Energy Policy Act's effects on project rating criteria. To get from today's reality to broader markets for independent power requires clear recognition of the capital markets evolution in process and consideration of how the Energy Policy Act may affect them. A strategy to remove obstructions to capital market development can then be identified.

  16. Awards, Achievements

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits & Inspections Audits &drivers to seeAwardsAwards |Awards

  17. Scientific Achievement

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of Science (SC)Science-DrivenPhysics

  18. Scientific Achievement

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of Science

  19. Scientific Achievement

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of ScienceDiscovered the 'reactive Leidenfrost'

  20. Scientific Achievement

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of ScienceDiscovered the 'reactive

  1. Scientific Achievement

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of ScienceDiscovered the 'reactiveintroduced the

  2. Scientific Achievement

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of ScienceDiscovered the 'reactiveintroduced

  3. Scientific Achievement

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of ScienceDiscovered the

  4. The Digital discrimination of neutron and {\\gamma} ray using organic scintillation detector based on wavelet transform modulus maximum

    E-Print Network [OSTI]

    yun, Yang; jun, Yang; xiaoliang, Luo

    2013-01-01

    A novel algorithm for the discrimination of neutron and {\\gamma}-ray with wavelet transform modulus maximum (WTMM) in an organic scintillation has been investigated. Voltage pulses arising from a BC501A organic liquid scintillation detector in a mixed radiation field have been recorded with a fast digital sampling oscilloscope. The performances of most pulse shape discrimination methods in scintillation detection systems using time-domain features of the pulses are affected intensively by noise. However, the WTMM method using frequency-domain features exhibits a strong insensitivity to noise and can be used to discriminate neutron and {\\gamma}-ray events based on their different asymptotic decay trend between the positive modulus maximum curve and the negative modulus maximum curve in the scale-space plane. This technique has been verified by the corresponding mixed-field data assessed by the time-of-flight (TOF) method and the frequency gradient analysis (FGA) method. It is shown that the characterization of...

  5. Feasibility of Achieving Net-Zero-Energy Net-Zero-Cost

    E-Print Network [OSTI]

    1 Feasibility of Achieving Net- Zero-Energy Net-Zero-Cost Homes I.S. Walker, Al-Beaini, SSimjanovic,JohnStanley,BretStrogen,IainWalker FeasibilityofAchieving ZeroNetEnergy,Zero NetCostHomes #12;4 ACKNOWLEDGEMENTS. Environmental Energy Technologies Division September 2009 This work was supported by the Assistant Secretary

  6. Home / News / Remanufacturing And Design: A Promising Solution For Achieving Green, Profitable Businesses CURRENT NEWS

    E-Print Network [OSTI]

    Kim, Harrison

    Home / News / Remanufacturing And Design: A Promising Solution For Achieving Green, Profitable CALENDAR Make a Gift Now Harrison Kim Remanufacturing and design: a promising solution for achieving green of operating both green and profitable businesses," explained Harrison Kim, an associate professor

  7. NEWS REPORT William L. Ogren was honored with a Lifetime Achievement

    E-Print Network [OSTI]

    Govindjee

    is a brief description of the 2010 Lifetime Achievement Award received by William (Bill) L. Ogren from; William Lucas, University of California at Davis; Harald Paulsen, Johannes Gutenberg University MainzNEWS REPORT William L. Ogren was honored with a Lifetime Achievement Award by the Rebeiz Foundation

  8. Achieving Canada's climate targets and the impacts on Alberta's oil sands industry

    E-Print Network [OSTI]

    Achieving Canada's climate targets and the impacts on Alberta's oil sands industry by Maximilian Management 608 Title of Project: Achieving Canada's climate targets and the impacts on Alberta's oil sands of domestic and international climate efforts on Alberta's oil sands industry. The modelling results predict

  9. Achieving Water Use Efficiency in Irrigation Districts Ronald C. Griffin1

    E-Print Network [OSTI]

    Griffin, Ronald

    Achieving Water Use Efficiency in Irrigation Districts Ronald C. Griffin1 Abstract: Irrigation districts are challenging places to achieve efficient water use when the ultimate water users do not individually own the units of water they use. The consequence is that irrigators have difficulty seeing value

  10. Pathways to Technology Transfer and Adoption: Achievements and Challenges (Mini-Tutorial)

    E-Print Network [OSTI]

    Xie, Tao

    Pathways to Technology Transfer and Adoption: Achievements and Challenges (Mini-Tutorial) Dongmei. There are some common challenges faced when pursuing technology transfer and adoption while particular challenges transfer and adoption. This mini-tutorial presents achievements and challenges of technology transfer

  11. Achievable Push-Manipulation for Complex Passive Mobile Objects using Past Experience

    E-Print Network [OSTI]

    Veloso, Manuela M.

    Achievable Push-Manipulation for Complex Passive Mobile Objects using Past Experience Tekin Meriçli and object trajecto- ries as building blocks to generate achievable and collision- free push plans.ifaamas.org). All rights reserved. Figure 1: Realistically simulated passive mobile ob- jects on freely

  12. REQUEST FOR REVIEW OF DECISION / REQUEST FOR READMISSION TERMINATION FROM COURSE NOT ACHIEVING SATISFACTORY COURSE PROGRESS

    E-Print Network [OSTI]

    Mucina, Ladislav

    REQUEST FOR REVIEW OF DECISION / REQUEST FOR READMISSION TERMINATION FROM COURSE NOT ACHIEVING is obliged to report student visa holders who have been Terminated for not achieving satisfactory course of the appeals process. COURSE DETAILS COURSE FROM WHICH I HAVE BEEN TERMINATED Course code Course name STUDY

  13. Energy-Efficient Scheduling for Best-Effort Interactive Services to Achieve High Response Quality

    E-Print Network [OSTI]

    Bader, David A.

    Energy-Efficient Scheduling for Best-Effort Interactive Services to Achieve High Response Quality. In this paper, we study the quality-energy tradeoff for such services by using a composite performance metric the concave quality function of best-effort applications to achieve high service quality with low energy

  14. On the Achievable Bit Rates of DSL Vectoring Techniques in the Presence of Alien Crosstalkers

    E-Print Network [OSTI]

    On the Achievable Bit Rates of DSL Vectoring Techniques in the Presence of Alien Crosstalkers Amir simulations, the achievable bit rates are investigated in the presence of alien crosstalkers, assuming a beta that when there are no alien crosstalkers, the low-complexity ZFE allows reaching crosstalk-free rates in US

  15. Control of Hamiltonian chaos as a possible tool to control anomalous transport in fusion plasmas

    E-Print Network [OSTI]

    G. Ciraolo; F. Briolle; C. Chandre; E. Floriani; R. Lima; M. Vittot; M. Pettini; C. Figarella; P. Ghendrih

    2003-12-17

    It is shown that a relevant control of Hamiltonian chaos is possible through suitable small perturbations whose form can be explicitly computed. In particular, it is possible to control (reduce) the chaotic diffusion in the phase space of a Hamiltonian system with 1.5 degrees of freedom which models the diffusion of charged test particles in a turbulent electric field across the confining magnetic field in controlled thermonuclear fusion devices. Though still far from practical applications, this result suggests that some strategy to control turbulent transport in magnetized plasmas, in particular tokamaks, is conceivable. The robustness of the control is investigated in terms of a departure from the optimum magnitude, of a varying cut-off at large wave vectors, and of random errors on the phases of the modes. In all three cases, there is a significant region of maximum efficiency in the vicinity of the optimum control term.

  16. Autonomous Control of Nuclear Power Plants

    SciTech Connect (OSTI)

    Basher, H.

    2003-10-20

    A nuclear reactor is a complex system that requires highly sophisticated controllers to ensure that desired performance and safety can be achieved and maintained during its operations. Higher-demanding operational requirements such as reliability, lower environmental impacts, and improved performance under adverse conditions in nuclear power plants, coupled with the complexity and uncertainty of the models, necessitate the use of an increased level of autonomy in the control methods. In the opinion of many researchers, the tasks involved during nuclear reactor design and operation (e.g., design optimization, transient diagnosis, and core reload optimization) involve important human cognition and decisions that may be more easily achieved with intelligent methods such as expert systems, fuzzy logic, neural networks, and genetic algorithms. Many experts in the field of control systems share the idea that a higher degree of autonomy in control of complex systems such as nuclear plants is more easily achievable through the integration of conventional control systems and the intelligent components. Researchers have investigated the feasibility of the integration of fuzzy logic, neural networks, genetic algorithms, and expert systems with the conventional control methods to achieve higher degrees of autonomy in different aspects of reactor operations such as reactor startup, shutdown in emergency situations, fault detection and diagnosis, nuclear reactor alarm processing and diagnosis, and reactor load-following operations, to name a few. With the advancement of new technologies and computing power, it is feasible to automate most of the nuclear reactor control and operation, which will result in increased safety and economical benefits. This study surveys current status, practices, and recent advances made towards developing autonomous control systems for nuclear reactors.

  17. The Role of Lithium Conditioning in Achieving High Performance, Long Pulse H-mode Discharges in the NSTX and EAST Devices

    SciTech Connect (OSTI)

    Maingi, Rajesh; Mansfield, D. K.; Gong, X. Z.; Sun, Z.; Bell, M. G.

    2014-10-01

    In this paper, the role of lithium wall conditioning on the achievement of high performance, long pulse discharges in the National Spherical Torus Experiment (NSTX) and the Experimental Advanced Superconducting Tokamak (EAST) is documented. Common observations include recycling reduction and elimination of ELMs. In NSTX, lithium conditioning typically resulted in ELM-free operation with impurity accumulation, which was ameliorated e.g. with pulsed 3D fields to trigger controlled ELMs. Active lithium conditioning in EAST discharges has overcome this problem, producing an ELM-free Hmode with controlled density and impurities.

  18. HTGR Resilient Control System Strategy

    SciTech Connect (OSTI)

    Lynne M. Stevens

    2010-09-01

    A preeminent objective for corporate and government organizations is the protection of major investments, which is attained by achieving state awareness, a comprehensive understanding of security and safety, for critical infrastructures. Given the dependence of critical infrastructure on control systems for automation, the integrity of these systems and their ability to provide owner/operators a high degree of state awareness is essential in attaining a high degree of investment protection and public acceptance. Operators as well as government are therefore burdened to ensure they have a timely understanding of the status of their plant or all plants, respectively, to ensure efficient operations and investment and public protection. “This characterization is a significant objective that must consider many aspects of instrumentation, control, and intelligent systems in order to achieve the required result. These aspects include sensory, communication, analysis, decision, and human system interfaces necessary to achieve fusion of data and presentation of results that will provide an understanding of what issues are important and why.

  19. The desire to achieve both high power density and high power conversion efficiency leads to several required features of a first wall and blanket concept. Achieving high

    E-Print Network [OSTI]

    California at Los Angeles, University of

    required features of a first wall and blanket concept. Achieving high power density means that the coolant wall and blanket design, tritium breeding, activation and waste, power conversion, first wall thermo First wall heat flux 2 MW/m2 Neutron wall load 10 MW/m2 Tritium Breeding Ratio (local 2D) 1.37 Power

  20. IEICE TRANS. FUNDAMENTALS, VOL.E85 {A, NO.12 DECEMBER 2002 Approximate Maximum Likelihood Source Separation

    E-Print Network [OSTI]

    Choi, Seungjin

    IEICE TRANS. FUNDAMENTALS, VOL.E85 {A, NO.12 DECEMBER 2002 1 PAPER Approximate Maximum Likelihood (t)] T is generated by x(t) = As(t) + v(t); (1) where A 2 IR m#2;n (m #21; n) is called the mixing ma of Education of Korea for its #12;nancial support toward the Electrical and Computer Engineering Division

  1. Development of a branch and price approach involving vertex cloning to solve the maximum weighted independent set problem 

    E-Print Network [OSTI]

    Sachdeva, Sandeep

    2006-04-12

    We propose a novel branch-and-price (B&P) approach to solve the maximum weighted independent set problem (MWISP). Our approach uses clones of vertices to create edge-disjoint partitions from vertex-disjoint partitions. We solve the MWISP on sub...

  2. Factors Determining the Location of the Chlorophyll Maximum and the Fate of Algal Production within the Tidal

    E-Print Network [OSTI]

    Bukaveckas, Paul A.

    that cause the formation of a chlorophyll maximum within the tidal freshwater James River. Phyto- plankton in their dominant mode of hydrodynamics, tidal freshwaters share a number of features in common with rivers of the saline estuary. Their hydrodynamics are dominated by bi- directional flow but are subject to considerable

  3. CORRELATED STUDIES AT ACTIVITY MAXIMUM: THE SUN AND THE SOLAR WIND H. S. Hudson 1 and A. B. Galvin 2

    E-Print Network [OSTI]

    California at Berkeley, University of

    , University of Maryland, College Park, MD 20742, USA ABSTRACT The breadth and power of the set of solar1 CORRELATED STUDIES AT ACTIVITY MAXIMUM: THE SUN AND THE SOLAR WIND H. S. Hudson 1 and A. B at solar minimum or in the declining phase of the past maxi­ mum, but we anticipate that most

  4. Maximum extent of the Eurasian ice sheets in the Barents and Kara Sea region during the Weichselian

    E-Print Network [OSTI]

    Möller, Per

    . ISSN 0300-9483. Based on field investigations in northern Russia and interpretation of offshore seismic that the Barents and Kara ice sheets attained their maximum Weichselian positions in northern Russia prior to 50), to more localized ice caps over the Urals a

  5. Asymmetric response of maximum and minimum temperatures to soil emissivity change over the Northern African Sahel in a GCM

    E-Print Network [OSTI]

    Zhou, Liming

    Asymmetric response of maximum and minimum temperatures to soil emissivity change over the Northern in the Sahel could lead to reduced land surface emissivity and thus might have an asymmetric impact on daytime balance to changes in soil emissivity over the Sahel using the recently developed Community Land Model

  6. The maximum potential to generate wind power in the contiguous United States is more than three times

    E-Print Network [OSTI]

    , the potential for 100-meter hubs operating in windy regions with at least 30% capacity is 12,125 GW of wind, the installed U.S. wind power capacity is now about 35 GW. While most of the wind potential comes from the windyThe maximum potential to generate wind power in the contiguous United States is more than three

  7. 2 Ocean circulation at the Last Glacial Maximum: 3 A combined modeling and magnetic proxy-based study

    E-Print Network [OSTI]

    40 greater influence and penetration of deep water formed in 41 the Southern Ocean [e.g., Oppo2 Ocean circulation at the Last Glacial Maximum: 3 A combined modeling and magnetic proxy (NADW) is an important component of the ocean thermohaline 7 circulation, but debate exists over

  8. MILLISECOND PULSAR AGES: IMPLICATIONS OF BINARY EVOLUTION AND A MAXIMUM SPIN LIMIT

    SciTech Connect (OSTI)

    Kiziltan, Buelent; Thorsett, Stephen E., E-mail: bulent@astro.ucsc.ed [Department of Astronomy and Astrophysics, University of California and UCO/Lick Observatory, Santa Cruz, CA 95064 (United States)

    2010-05-20

    In the absence of constraints from the binary companion or supernova remnant, the standard method for estimating pulsar ages is to infer an age from the rate of spin-down. While the generic spin-down age may give realistic estimates for normal pulsars, it can fail for pulsars with very short periods. Details of the spin-up process during the low-mass X-ray binary (LMXB) phase pose additional constraints on the period (P) and spin-down rates ( P-dot ) that may consequently affect the age estimate. Here, we propose a new recipe to estimate millisecond pulsar (MSP) ages that parametrically incorporates constraints arising from binary evolution and limiting physics. We show that the standard method can be improved by this approach to achieve age estimates closer to the true age while the standard spin-down age may overestimate or underestimate the age of the pulsar by more than a factor of {approx}10 in the millisecond regime. We use this approach to analyze the population on a broader scale. For instance, in order to understand the dominant energy loss mechanism after the onset of radio emission, we test for a range of plausible braking indices. We find that a braking index of n = 3 is consistent with the observed MSP population. We demonstrate the existence and quantify the potential contributions of two main sources of age corruption: the previously known 'age bias' due to secular acceleration and 'age contamination' driven by sub-Eddington progenitor accretion rates. We explicitly show that descendants of LMXBs that have accreted at very low rates ( m-dot << M-dot{sub Edd}) will exhibit ages that appear older than the age of the Galaxy. We further elaborate on this technique, the implications and potential solutions it offers regarding MSP evolution, the underlying age distribution, and the post-accretion energy loss mechanism.

  9. Maximum population transfer in a periodically driven two-level system

    E-Print Network [OSTI]

    P. M. Poggi; F. J. Arranz; R. M. Benito; F. Borondo; D. A. Wisniacki

    2014-12-03

    We study the dynamics of a two-level quantum system under the influence of sinusoidal driving in the intermediate frequency regime. Analyzing the Floquet quasienergy spectrum, we find combinations of the field parameters for which population transfer is optimal and takes place through a series of well defined steps of fixed duration. We also show how the corresponding evolution operator can be approximated at all times by a very simple analytical expression. We propose this model as being specially suitable for treating periodic driving at avoided crossings found in complex multi-level systems, and thus show a relevant application of our results to designing a control protocol in a realistic molecular model

  10. VARIABLE FIRING RATE OIL BURNER USING PULSE FUEL FLOW CONTROL.

    SciTech Connect (OSTI)

    KRISHNA,C.R.; BUTCHER,T.A.; KAMATH,B.R.

    2004-10-01

    The residential oil burner market is currently dominated by the pressure-atomized retention head burner, which has an excellent reputation for reliability and efficiency. In this burner, oil is delivered to a fuel nozzle at pressures from 100 to 150 psi. In addition, to atomizing the fuel, the small, carefully controlled size of the nozzle exit orifice serves to control the burner firing rate. Burners of this type are currently available at firing rates of more than 0.5 gallons-per-hour (70,000 Btu/hr). Nozzles have been made for lower firing rates, but experience has shown that such nozzles suffer rapid fouling of the necessarily small passages, leading to bad spray patterns and poor combustion performance. Also, traditionally burners and the nozzles are oversized to exceed the maximum demand. Typically, this is figured as follows. The heating load of the house on the coldest day for the location is considered to define the maximum heat load. The contractor or installer adds to this to provide a safety margin and for future expansion of the house. If the unit is a boiler that provides domestic hot water through the use of a tankless heating coil, the burner capacity is further increased. On the contrary, for a majority of the time, the heating system is satisfying a much smaller load, as only rarely do all these demands add up. Consequently, the average output of the heating system has to be much less than the design capacity and this is accomplished by start and stop cycling operation of the system so that the time-averaged output equals the demand. However, this has been demonstrated to lead to overall efficiencies lower than the steady-state efficiency. Therefore, the two main reasons for the current practice of using oil burners much larger than necessary for space heating are the unavailability of reliable low firing rate oil burners and the desire to assure adequate input rate for short duration, high draw domestic hot water loads. One approach to solve this problem is to develop a burner, which can operate at two firing rates, with the lower rate being significantly lower than 0.5 gallons per hour. This paper describes the initial results of adopting this approach through a pulsed flow nozzle. It has been shown that the concept of flow modulation with a small solenoid valve is feasible. Especially in the second configuration tested, where the Lee valve was integrated with the nozzle, reasonable modulation in flow of the order of 1.7 could be achieved. For this first prototype, the combustion performance is still not quite satisfactory. Improvements in operation, for example by providing a sharp and positive shut-off so that there is no flow under low pressures with consequent poor atomization could lead to better combustion performance. This could be achieved by using nozzles that have shut off or check valves for example. It is recommended that more work in cooperation with the valve manufacturer could produce a technically viable system. Marketability is of course a far more complex problem to be addressed once a technically viable product is available.

  11. Self-Tuning PI TCP Flow Controller for AQM Routers With Interval Gain and Phase Margin Assignment

    E-Print Network [OSTI]

    Huang, Changcheng

    -tuning proportional-integral (PI) controller for Active Queue Management (AQM) in the Internet. Classical control to achieve good AQM performance while adapting the AQM control system to great traffic load changes very well Queue Management, PI Control, Gain Margin, Phase Margin, Self-Tune 1. INTRODUCTION Congestion control

  12. Stormwater Control Structures

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

    Stormwater Control Structures Stormwater Control Structures Stormwater control structures are engineered to control run-on and runoff water from suspected contaminated sites....

  13. Centralized and Decentralized Control for Demand Response

    SciTech Connect (OSTI)

    Lu, Shuai; Samaan, Nader A.; Diao, Ruisheng; Elizondo, Marcelo A.; Jin, Chunlian; Mayhorn, Ebony T.; Zhang, Yu; Kirkham, Harold

    2011-04-29

    Demand response has been recognized as an essential element of the smart grid. Frequency response, regulation and contingency reserve functions performed traditionally by generation resources are now starting to involve demand side resources. Additional benefits from demand response include peak reduction and load shifting, which will defer new infrastructure investment and improve generator operation efficiency. Technical approaches designed to realize these functionalities can be categorized into centralized control and decentralized control, depending on where the response decision is made. This paper discusses these two control philosophies and compares their relative advantages and disadvantages in terms of delay time, predictability, complexity, and reliability. A distribution system model with detailed household loads and controls is built to demonstrate the characteristics of the two approaches. The conclusion is that the promptness and reliability of decentralized control should be combined with the predictability and simplicity of centralized control to achieve the best performance of the smart grid.

  14. Using Energy Management Control Systems for HVAC Operational Diagnostics 

    E-Print Network [OSTI]

    Stum, K.

    1998-01-01

    unit (TU). If this is greater than 10% of the maximum box CFM rating, there may be a flow sensor or control loop malfunction. The moving average space temperature deviation is also hacked and can immediately detect when there is a problem...

  15. A Typology of Foredune Textures: Sand Patches and Climate Controls 

    E-Print Network [OSTI]

    Ryu, Wansang

    2012-12-10

    much (R^2 is 0.04 at maximum). This suggests that dune activity or stabilization in coastal dune systems is mainly controlled by vegetation cover, which is in turn affected by precipitation. Foredune textures can be a useful tool to predict foredune...

  16. Perform, Achieve and Trade (PAT): An Innovative Mechanism for Enhancing Energy Efficiency in India's Industrial Sector 

    E-Print Network [OSTI]

    Garnik, S. P.; Martin, M.

    2014-01-01

    consumption (SEC) reduction targets for 478 DCs in eight industrial sectors like Cement, Pulp & Paper, Aluminium, Textile, Chlor-Alkali, Iron &Steel, Fertilizer and Thermal Power Plant. Different targets have been assigned to different DCs and to be achieved...

  17. Predicting Academic Achievement: The Role Of Parenting, Nonverbal Intelligence, and Goal Orientation in Turkish Children 

    E-Print Network [OSTI]

    Korkmaz, Ummugulsum

    2014-07-25

    The purpose of this research is to examine parenting, child goal orientation, and child nonverbal intelligence as predictors of academic achievement among fifth grade Turkish children. The influence of intelligence, parenting ...

  18. An investigation of a professional development program using industry partnerships and student achievement 

    E-Print Network [OSTI]

    Sullivan, Helen Grace

    2008-10-10

    This investigation examined the impact on student achievement of teachers who participated in a professional development program using industry partnerships. One treatment and one non-treatment school in a large urban school district served...

  19. VOTED BALTIMORE'S BEST 100 WELLNESS GOALS WILL BE ACHIEVED THIS MONTH AT THE MAC.

    E-Print Network [OSTI]

    VOTED BALTIMORE'S BEST 100 WELLNESS GOALS WILL BE ACHIEVED THIS MONTH AT THE MAC. MAKE YOURS ONE. | Baltimore, MD 21202 | 410.625.5000 ExpRESS 11212 McCormick Rd. | Hunt Valley, MD 21031 | 410

  20. A Waterfall Model to Achieve Energy Efficient Tasks Mapping for Large

    E-Print Network [OSTI]

    Bader, David A.

    reduce the energy consumption and achieve a better load balance for GPU clusters. A task generator based to significantly reduce space, power, and cooling demands. Nvidia's commercial "Tesla" GPU with four high

  1. How America Can Look Within to Achieve Energy Security and Reduce...

    Office of Scientific and Technical Information (OSTI)

    to Achieve Energy Security and Reduce Global Warming Making major gains in energy efficiency is one of the most economical and effective ways our nation can wean itself off its...

  2. 11th Grade Students' English Reading Motivation, Language Problems and Reading Achievement in Taiwan 

    E-Print Network [OSTI]

    Su, Jung-Hsuan

    2012-07-16

    ’ English reading motivation and its relationship with perceived language problems and reading achievement. 302 11th grade students from an urban district in southern Taiwan participated in the study. Measures included an English reading comprehension...

  3. The Relationships among Motivation, Self-Regulated Learning, and Academic Achievement 

    E-Print Network [OSTI]

    Bae, Yunhee

    2014-08-29

    This dissertation consists of two articles investigating the relationships among motivation, self-regulated learning (SRL), and academic achievement for adolescents: (a) a meta-analytic review of the literature, and (b) tests of a theoretical model...

  4. Effect of Special Education Proportion on School-Level Achievement in Texas Elementary Schools 

    E-Print Network [OSTI]

    Grande, Robert John

    2014-12-03

    For almost thirty years researchers have attempted to measure the impact that educating special education students with their regular education peers has on academic achievement. A review of the research literature addressing this broad question...

  5. Children's achievement goals, attitudes, and disruptive behaviors in an after-school physical activity program 

    E-Print Network [OSTI]

    Agbuga, Bulent

    2007-09-17

    CHILDREN’S ACHIEVEMENT GOALS, ATTITUDES, AND DISRUPTIVE BEHAVIORS IN AN AFTER­SCHOOL PHYSICAL ACTIVITY PROGRAM A Dissertation by BULENT AGBUGA Submitted... to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY May207 Major Subject: Kinesiology CHILDREN’S ACHIEVEMENT GOALS, ATTITUDES, AND DISRUPTIVE BEHAVIORS IN AN AFTER­SCHOOL PHYSICAL ACTIVITY PROGRAM A Dissertation by BULENT AGBUGA Submitted...

  6. Colliding Laser Pulses for Laser-Plasma Accelerator Injection Control

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    Colliding Laser Pulses for Laser-Plasma Accelerator Injection Control G. R. Plateau, , C. G. R acceleration is a key challenge to achieve compact, reliable, tunable laser-plasma accelerators (LPA) [1, 2]. In colliding pulse injection the beat between multiple laser pulses can be used to control energy, energy

  7. Towards Integrated Design of a Robust Feedback Controller and Topography

    E-Print Network [OSTI]

    Van den Hof, Paul

    Towards Integrated Design of a Robust Feedback Controller and Topography Estimator for Atomic Force of the sample topography. Dynamical uncertainties of the system pose a strong limitation on the achievable control bandwidth, and on the accuracy of the estimated topography. This contribution discusses

  8. Environment Monitoring and Control of a Polyhouse Farm through Internet

    E-Print Network [OSTI]

    Khandekar, Sameer

    1 Environment Monitoring and Control of a Polyhouse Farm through Internet Yogesh R. Sonawane is the objective of the work presented in this paper. The objective is achieved through the use of internet based. Keywords: Monitoring and Control through internet, Polyhouse farm environment management. I. INTRODUCTION

  9. Project: Driver and controller for a thermoelectric cooler

    E-Print Network [OSTI]

    Project: Driver and controller for a thermoelectric cooler Supervisor: Prof. Sam Ben-Yaakov Year solutions. Based on one of the three thermoelectric phenomena ­ the Peltier effect ­ bi-directional control is achieved. The TEC (which is a Thermoelectric Cooler) uses this effect. The direction of the current through

  10. Extracting maximum petrophysical and geological information from a limited reservoir database

    SciTech Connect (OSTI)

    Ali, M.; Chawathe, A.; Ouenes, A.

    1997-08-01

    The characterization of old fields lacking sufficient core and log data is a challenging task. This paper describes a methodology that uses new and conventional tools to build a reliable reservoir model for the Sulimar Queen field. At the fine scale, permeability measured on a fine grid with a minipermeameter was used in conjunction with the petrographic data collected on multiple thin sections. The use of regression analysis and a newly developed fuzzy logic algorithm led to the identification of key petrographic elements which control permeability. At the log scale, old gamma ray logs were first rescaled/calibrated throughout the entire field for consistency and reliability using only four modem logs. Using data from one cored well and the rescaled gamma ray logs, correlations between core porosity, permeability, total water content and gamma ray were developed to complete the small scale characterization. At the reservoir scale, outcrop data and the rescaled gamma logs were used to define the reservoir structure over an area of ten square miles where only 36 wells were available. Given the structure, the rescaled gamma ray logs were used to build the reservoir volume by identifying the flow units and their continuity. Finally, history-matching results constrained to the primary production were used to estimate the dynamic reservoir properties such as relative permeabilities to complete the characterization. The obtained reservoir model was tested by forecasting the waterflood performance and which was in good agreement with the actual performance.

  11. Room at the Mountain: Estimated Maximum Amounts of Commercial Spent Nuclear Fuel Capable of Disposal in a Yucca Mountain Repository

    SciTech Connect (OSTI)

    Kessler, John H. [Electric Power Research Institute - EPRI, 3420 Hillview Avenue, Palo Alto, California 94304 (United States); Kemeny, John [University of Arizona, Tucson AZ 85721 (United States); King, Fraser [Integrity Corrosion Consulting, Ltd., 6732 Silverview Drive NW, Calgary, Alberta (Canada); Ross, Alan M. [Alan M. Ross and Associates, 1061 Gray Fox Circle Pleasanton, CA 94566 (Canada); Ross, Benjamen [Disposal Safety, Inc., Bethesda, MD 20814 (United States)

    2006-07-01

    The purpose of this paper is to present an initial analysis of the maximum amount of commercial spent nuclear fuel (CSNF) that could be emplaced into a geological repository at Yucca Mountain. This analysis identifies and uses programmatic, material, and geological constraints and factors that affect this estimation of maximum amount of CSNF for disposal. The conclusion of this initial analysis is that the current legislative limit on Yucca Mountain disposal capacity, 63,000 MTHM of CSNF, is a small fraction of the available physical capacity of the Yucca Mountain system assuming the current high-temperature operating mode (HTOM) design. EPRI is confident that at least four times the legislative limit for CSNF ({approx}260,000 MTHM) can be emplaced in the Yucca Mountain system. It is possible that with additional site characterization, upwards of nine times the legislative limit ({approx}570,000 MTHM) could be emplaced. (authors)

  12. Two experiments for the price of one? -- The role of the second oscillation maximum in long baseline neutrino experiments

    E-Print Network [OSTI]

    Patrick Huber; Joachim Kopp

    2011-05-09

    We investigate the quantitative impact that data from the second oscillation maximum has on the performance of wide band beam neutrino oscillation experiments. We present results for the physics sensitivities to standard three flavor oscillation, as well as results for the sensitivity to non-standard interactions. The quantitative study is performed using an experimental setup similar to the Fermilab to DUSEL Long Baseline Neutrino Experiment (LBNE). We find that, with the single exception of sensitivity to the mass hierarchy, the second maximum plays only a marginal role due to the experimental difficulties to obtain a statistically significant and sufficiently background-free event sample at low energies. This conclusion is valid for both water Cherenkov and liquid argon detectors. Moreover, we confirm that non-standard neutrino interactions are very hard to distinguish experimentally from standard three-flavor effects and can lead to a considerable loss of sensitivity to \\theta_{13}, the mass hierarchy and CP violation.

  13. Savannah River Site dose control

    SciTech Connect (OSTI)

    Smith, L.S.

    1992-06-01

    Health physicists from the Brookhaven National Laboratory (BNL) visited the Savannah River Site (SRS) as one of 12 facilities operated by the Department of Energy (DOE) contractors with annual collective dose equivalents greater than 100 person-rem (100 person-cSv). Their charter was to review, evaluate and summarize as low as reasonably achievable (ALARA) techniques, methods and practices as implemented. This presentation gives an overview of the two selected ALARA practices implemented at the SRS: Administrative Exposure Limits and Goal Setting. These dose control methods are used to assure that individual and collective occupational doses are ALARA and within regulatory limits.

  14. DOE standard: Radiological control

    SciTech Connect (OSTI)

    Not Available

    1999-07-01

    The Department of Energy (DOE) has developed this Standard to assist line managers in meeting their responsibilities for implementing occupational radiological control programs. DOE has established regulatory requirements for occupational radiation protection in Title 10 of the Code of Federal Regulations, Part 835 (10 CFR 835), ``Occupational Radiation Protection``. Failure to comply with these requirements may lead to appropriate enforcement actions as authorized under the Price Anderson Act Amendments (PAAA). While this Standard does not establish requirements, it does restate, paraphrase, or cite many (but not all) of the requirements of 10 CFR 835 and related documents (e.g., occupational safety and health, hazardous materials transportation, and environmental protection standards). Because of the wide range of activities undertaken by DOE and the varying requirements affecting these activities, DOE does not believe that it would be practical or useful to identify and reproduce the entire range of health and safety requirements in this Standard and therefore has not done so. In all cases, DOE cautions the user to review any underlying regulatory and contractual requirements and the primary guidance documents in their original context to ensure that the site program is adequate to ensure continuing compliance with the applicable requirements. To assist its operating entities in achieving and maintaining compliance with the requirements of 10 CFR 835, DOE has established its primary regulatory guidance in the DOE G 441.1 series of Guides. This Standard supplements the DOE G 441.1 series of Guides and serves as a secondary source of guidance for achieving compliance with 10 CFR 835.

  15. Study of Cosmic-Ray Modulation during the Recent Unusual Minimum and Mini Maximum of Solar Cycle 24

    E-Print Network [OSTI]

    Aslam, O P M

    2015-01-01

    After a prolonged and deep solar minimum at the end of Cycle 23, the current Solar Cycle 24 is one of the lowest cycles. These two periods of deep minimum and mini maximum are separated by a period of increasing solar activity. We study the cosmic-ray intensity variation in relation with the solar activity, heliospheric plasma and field parameters, including the heliospheric current sheet, during these three periods (phases) of different activity level and nature: (a) a deep minimum, (b) an increasing activity period and (c) a mini maximum. We use neutron monitor data from stations located around the globe to study the rigidity dependence on modulation during the two extremes, i.e., minimum and maximum. We also study the time lag between the cosmic-ray intensity and various solar and interplanetary parameters separately during the three activity phases. We also analyze the role of various parameters, including the current sheet tilt, in modulating the cosmic-ray intensity during the three different phases. Th...

  16. The Silicon and Calcium High-Velocity Features in Type Ia Supernovae from Early to Maximum Phases

    E-Print Network [OSTI]

    Zhao, Xulin; Maeda, Keiichi; Sai, Hanna; Zhang, Tianmeng; Zhang, Jujia; Huang, Fang; Rui, Liming; Zhou, Qi; Mo, Jun

    2015-01-01

    The high-velocity features (HVFs) in optical spectra of type Ia supernovae (SNe Ia) are examined with a large sample including very early-time spectra (e.g., t < -7 days). Multiple Gaussian fits are applied to examine the HVFs and their evolutions, using constraints on expansion velocities for the same species (i.e., SiII 5972 and SiII 6355). We find that strong HVFs tend to appear in SNe Ia with smaller decline rates (e.g., dm15(B)<1.4 mag), clarifying that the finding by Childress et al. (2014) for the Ca-HVFs in near-maximum-light spectra applies both to the Si-HVFs and Ca-HVFs in the earlier phase. The Si-HVFs seem to be more common in fast-expanding SNe Ia, which is different from the earlier result that the Ca-HVFs are associated with SNe Ia having slower SiII 6355 velocities at maximum light (i.e., Vsi). This difference can be due to that the HVFs in fast-expanding SNe Ia usually disappear more rapidly and are easily blended with the photospheric components when approaching the maximum light. Mor...

  17. Finance & Administration Controller's Office

    E-Print Network [OSTI]

    Weston, Ken

    Finance & Administration Controller's Office April 2014 Michael Williams Controller Controller ICOFA 61318 Revised: 4/4/2014 #12;Finance & Administration Controller's Office Accounting & Asset Coordinator Property Surplus Sales 81269 Revised: 4/4/2014 #12;Finance & Administration Controller's Office

  18. Universal adaptive torque control for PM motors for field-weakening region operation

    DOE Patents [OSTI]

    Royak, Semyon (Beachwood, OH); Harbaugh, Mark M. (Richfield, OH); Breitzmann, Robert J. (South Russel, OH); Nondahl, Thomas A. (Wauwatosa, WI); Schmidt, Peter B. (Franklin, WI); Liu, Jingbo (Milwaukee, WI)

    2011-03-29

    The invention includes a motor controller and method for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by, among other things, receiving a torque command, determining a normalized torque command by normalizing the torque command to a characteristic current of the motor, determining a normalized maximum available voltage, determining an inductance ratio of the motor, and determining a direct-axis current based upon the normalized torque command, the normalized maximum available voltage, and the inductance ratio of the motor.

  19. Closed-loop Real-time Control of a Novel Linear Magnetostrictive Actuator 

    E-Print Network [OSTI]

    Chen, Chien-Fan

    2010-10-12

    . By changing the duty ratio of the PWM signal, the current in the coils can be changed from zero to its maximum value. With a current controller using an integrator with a gain of 10, the current can be controlled with high response time and an error of /- 0...

  20. IEEE TRANSACTIONS ON POWER ELECTRONICS 1 A Hybrid Power Control Concept for PV Inverters with Reduced

    E-Print Network [OSTI]

    Kerekes, Tamas

    IEEE TRANSACTIONS ON POWER ELECTRONICS 1 Letters A Hybrid Power Control Concept for PV Inverters- cept for grid-connected Photovoltaic (PV) inverters. The control strategy is based on either a Maximum on the instantaneous available power from the PV panels. The essence of the proposed concept lies in the selection

  1. Proceedingsof the American Control Conference San Diego, California June I999

    E-Print Network [OSTI]

    problem in axial flow compressors has been studied in several recent papers [1]-[3], and others controller is applied to the three-state, one-mode Moore-Greitzer Compres- sor model. A benchmark is first. The control mo- tivation being that at the maximum efficiency op- erating condition, the compressor

  2. Tuning for Smooth PID Control with Acceptable Disturbance Rejection Sigurd Skogestad*

    E-Print Network [OSTI]

    Skogestad, Sigurd

    ", commonly used in the pulp and paper industry, normally gives a much larger value for c; one recommendation robustness. This gives a maximum limit on the controller gain. In industrial practice, however, the objective rejection. This paper provides the corresponding minimum limit on the controller gain. In terms

  3. Recommendations for Improving Fecal Coliform Pollution Control in Gwinnett County, Georgia

    E-Print Network [OSTI]

    Radcliffe, David

    Recommendations for Improving Fecal Coliform Pollution Control in Gwinnett County, Georgia Upper for Improving Fecal Coliform Pollution Control 2 1.0 BACKGROUND and INTRODUCTION The 1972 Amendments to the Federal Clean Water Act require the creation of a Total Maximum Daily Load (TMDL) for a body of water

  4. Method for controlling powertrain pumps

    DOE Patents [OSTI]

    Sime, Karl Andrew; Spohn, Brian L; Demirovic, Besim; Martini, Ryan D; Miller, Jean Marie

    2013-10-22

    A method of controlling a pump supplying a fluid to a transmission includes sensing a requested power and an excess power for a powertrain. The requested power substantially meets the needs of the powertrain, while the excess power is not part of the requested power. The method includes sensing a triggering condition in response to the ability to convert the excess power into heat in the transmission, and determining that an operating temperature of the transmission is below a maximum. The method also includes determining a calibrated baseline and a dissipation command for the pump. The calibrated baseline command is configured to supply the fluid based upon the requested power, and the dissipation command is configured to supply additional fluid and consume the excess power with the pump. The method operates the pump at a combined command, which is equal to the calibrated baseline command plus the dissipation command.

  5. control and Dynamic Systems Decentralized Control

    E-Print Network [OSTI]

    Moore, John Barratt

    control and Dynamic Systems BR Departn Decentralized Control Using Time-Varying Feedback AN D. O controller one connects to the system, so long as the controller has available to it the system inputs of the closed-loop system. If the controller CopyrightO 1985 by Academic Pres, inc. 85 Allrightsofreproductjon

  6. Achieving gender equality in learning outcomes: Evidence from a non-formal education program in Bangladesh

    E-Print Network [OSTI]

    Gee, Kevin A

    2015-01-01

    controlled trial in education. Evaluation and Programproduction function Education, income, and human capital (children with quality education in rural Bangladesh:

  7. FINAL REPORT ON CONTROL ALGORITHM TO IMPROVE THE PARTIAL-LOAD EFFICIENCY OFSURFACE PM MACHINES WITH FRACTIONAL-SLOT CONCENTRATED WINDINGS

    SciTech Connect (OSTI)

    Reddy, P.B.; Jahns, T.M.

    2007-04-30

    Surface permanent magnet (SPM) synchronous machines using fractional-slot concentrated windings are being investigated as candidates for high-performance traction machines for automotive electric propulsion systems. It has been shown analytically and experimentally that such designs can achieve very wide constant-power speed ratios (CPSR) [1,2]. This work has shown that machines of this type are capable of achieving very low cogging torque amplitudes as well as significantly increasing the machine power density [3-5] compared to SPM machines using conventional distributed windings. High efficiency can be achieved in this class of SPM machine by making special efforts to suppress the eddy-current losses in the magnets [6-8], accompanied by efforts to minimize the iron losses in the rotor and stator cores. Considerable attention has traditionally been devoted to maximizing the full-load efficiency of traction machines at their rated operating points and along their maximum-power vs. speed envelopes for higher speeds [9,10]. For example, on-line control approaches have been presented for maximizing the full-load efficiency of PM synchronous machines, including the use of negative d-axis stator current to reduce the core losses [11,12]. However, another important performance specification for electric traction applications is the machine's efficiency at partial loads. Partial-load efficiency is particularly important if the target traction application requires long periods of cruising operation at light loads that are significantly lower than the maximum drive capabilities. While the design of the machine itself is clearly important, investigation has shown that this is a case where the choice of the control algorithm plays a critical role in determining the maximum partial-load efficiency that the machine actually achieves in the traction drive system. There is no evidence that this important topic has been addressed for this type of SPM machine by any other authors. This topic takes on even greater significance for fractional-slot concentrated-winding SPM machine designs. In particular, maximizing the torque/power density of this class of SPM machines typically leads to machine designs with high numbers of poles. The resulting high electrical frequencies can easily result in high stator core losses unless special care is taken during the machine design process. The purpose of this report is to discuss a modified vector control algorithm for a fractional-slot concentrated winding SPM machine that has been developed to maximize the machine's partial-load efficiency over a wide range of operating conditions. For purposes of this discussion, a 55 kW (peak) SPM machine designed to meet requirements established in the US FreedomCar program [13] is used as the basis for demonstrating the proposed technique. A combination of closed-form analysis [14] and finite element analysis (FEA) is used during this investigation.

  8. Final Report on Control Algorithm to Improve the Partial-Load Efficiency of Surface PM Machines with Fractional-Slot Concentrated Windings

    SciTech Connect (OSTI)

    McKeever, John W; Reddy, Patel; Jahns, Thomas M

    2007-05-01

    Surface permanent magnet (SPM) synchronous machines using fractional-slot concentrated windings are being investigated as candidates for high-performance traction machines for automotive electric propulsion systems. It has been shown analytically and experimentally that such designs can achieve very wide constant-power speed ratios (CPSR) [1,2]. This work has shown that machines of this type are capable of achieving very low cogging torque amplitudes as well as significantly increasing the machine power density [3-5] compared to SPM machines using conventional distributed windings. High efficiency can be achieved in this class of SPM machine by making special efforts to suppress the eddy-current losses in the magnets [6-8], accompanied by efforts to minimize the iron losses in the rotor and stator cores. Considerable attention has traditionally been devoted to maximizing the full-load efficiency of traction machines at their rated operating points and along their maximum-power vs. speed envelopes for higher speeds [9,10]. For example, on-line control approaches have been presented for maximizing the full-load efficiency of PM synchronous machines, including the use of negative d-axis stator current to reduce the core losses [11,12]. However, another important performance specification for electric traction applications is the machine's efficiency at partial loads. Partial-load efficiency is particularly important if the target traction application requires long periods of cruising operation at light loads that are significantly lower than the maximum drive capabilities. While the design of the machine itself is clearly important, investigation has shown that this is a case where the choice of the control algorithm plays a critical role in determining the maximum partial-load efficiency that the machine actually achieves in the traction drive system. There is no evidence that this important topic has been addressed for this type of SPM machine by any other authors. This topic takes on even greater significance for fractional-slot concentrated-winding SPM machine designs. In particular, maximizing the torque/power density of this class of SPM machines typically leads to machine designs with high numbers of poles. The resulting high electrical frequencies can easily result in high stator core losses unless special care is taken during the machine design process. The purpose of this report is to discuss a modified vector control algorithm for a fractional-slot concentrated winding SPM machine that has been developed to maximize the machine's partial-load efficiency over a wide range of operating conditions. For purposes of this discussion, a 55 kW (peak) SPM machine designed to meet requirements established in the US FreedomCar program [13] is used as the basis for demonstrating the proposed technique. A combination of closed-form analysis [14] and finite element analysis (FEA) is used during this investigation.

  9. Engine combustion control via fuel reactivity stratification

    DOE Patents [OSTI]

    Reitz, Rolf Deneys; Hanson, Reed M.; Splitter, Derek A.; Kokjohn, Sage L.

    2015-07-14

    A compression ignition engine uses two or more fuel charges having two or more reactivities to control the timing and duration of combustion. In a preferred implementation, a lower-reactivity fuel charge is injected or otherwise introduced into the combustion chamber, preferably sufficiently early that it becomes at least substantially homogeneously dispersed within the chamber before a subsequent injection is made. One or more subsequent injections of higher-reactivity fuel charges are then made, and these preferably distribute the higher-reactivity matter within the lower-reactivity chamber space such that combustion begins in the higher-reactivity regions, and with the lower-reactivity regions following thereafter. By appropriately choosing the reactivities of the charges, their relative amounts, and their timing, combustion can be tailored to achieve optimal power output (and thus fuel efficiency), at controlled temperatures (and thus controlled NOx), and with controlled equivalence ratios (and thus controlled soot).

  10. Engine combustion control via fuel reactivity stratification

    DOE Patents [OSTI]

    Reitz, Rolf Deneys; Hanson, Reed M; Splitter, Derek A; Kokjohn, Sage L

    2013-12-31

    A compression ignition engine uses two or more fuel charges having two or more reactivities to control the timing and duration of combustion. In a preferred implementation, a lower-reactivity fuel charge is injected or otherwise introduced into the combustion chamber, preferably sufficiently early that it becomes at least substantially homogeneously dispersed within the chamber before a subsequent injection is made. One or more subsequent injections of higher-reactivity fuel charges are then made, and these preferably distribute the higher-reactivity matter within the lower-reactivity chamber space such that combustion begins in the higher-reactivity regions, and with the lower-reactivity regions following thereafter. By appropriately choose the reactivities of the charges, their relative amounts, and their timing, combustion can be tailored to achieve optimal power output (and thus fuel efficiency), at controlled temperatures (and thus controlled NOx), and with controlled equivalence ratios (and thus controlled soot).

  11. Quantum optical interface for gate-controlled spintronic devices

    E-Print Network [OSTI]

    Hans-Andreas Engel; Jacob M. Taylor; Mikhail D. Lukin; Atac Imamoglu

    2006-12-29

    We describe an opto-electronic structure in which charge and spin degrees of freedom in electrical gate-defined quantum dots can be coherently coupled to light. This is achieved via electron-electron interaction or via electron tunneling into a proximal self-assembled quantum dot. We illustrate potential applications of this approach by considering several quantum control techniques, including optical read-out of gate-controlled semiconductor quantum bits and controlled generation of entangled photon-spin pairs.

  12. Predict-prevent control method for perturbed excitable systems

    E-Print Network [OSTI]

    Marzena Ciszak; Claudio R. Mirasso; Raul Toral; Oscar Calvo

    2008-07-15

    We present a control method based on two steps: prediction and prevention. For prediction we use the anticipated synchronization scheme, considering unidirectional coupling between excitable systems in a master-slave configuration. The master is the perturbed system to be controlled, meanwhile the slave is an auxiliary system which is used to predict the master's behavior. We demonstrate theoretically and experimentally that an efficient control may be achieved.

  13. Expert system to control a fusion energy experiment

    SciTech Connect (OSTI)

    Johnson, R.R.; Canales, T.; Lager, D.

    1986-01-01

    This paper describes a system that automates neutral beam source conditioning. The system achieves this with artificial intelligence techniques by encoding the behavior of several experts as a set of if-then rules in an expert system. One of the functions of the expert system is to control an adaptive controller that, in turn, controls the neutral beam source. The architecture of the system is presented followed by a description of its performance.

  14. ACHIEVING DEXTEROUS MANIPULATION FOR MINIMALLY INVASIVE SURGICAL ROBOTS THROUGH THE USE OF HYDRAULICS

    E-Print Network [OSTI]

    Li, Perry Y.

    the control valve. Q2 Flow rate of fluid passing through the controlled flow re- striction and exiting of a novel 3D valve, hydraulic artificial muscles, and multi-segmented flexible manipulator arms that fit to validate the concept and the numerical models. NOMENCLATURE A0 The orifice area of the control valve inlet

  15. Refurbishment program of HANARO control computer system

    SciTech Connect (OSTI)

    Kim, H. K.; Choe, Y. S.; Lee, M. W.; Doo, S. K.; Jung, H. S. [Korea Atomic Energy Research Inst., 989-111 Daedeok-daero, Yuseong, Daejeon, 305-353 (Korea, Republic of)

    2012-07-01

    HANARO, an open-tank-in-pool type research reactor with 30 MW thermal power, achieved its first criticality in 1995. The programmable controller system MLC (Multi Loop Controller) manufactured by MOORE has been used to control and regulate HANARO since 1995. We made a plan to replace the control computer because the system supplier no longer provided technical support and thus no spare parts were available. Aged and obsolete equipment and the shortage of spare parts supply could have caused great problems. The first consideration for a replacement of the control computer dates back to 2007. The supplier did not produce the components of MLC so that this system would no longer be guaranteed. We established the upgrade and refurbishment program in 2009 so as to keep HANARO up to date in terms of safety. We designed the new control computer system that would replace MLC. The new computer system is HCCS (HANARO Control Computer System). The refurbishing activity is in progress and will finish in 2013. The goal of the refurbishment program is a functional replacement of the reactor control system in consideration of suitable interfaces, compliance with no special outage for installation and commissioning, and no change of the well-proved operation philosophy. HCCS is a DCS (Discrete Control System) using PLC manufactured by RTP. To enhance the reliability, we adapt a triple processor system, double I/O system and hot swapping function. This paper describes the refurbishment program of the HANARO control system including the design requirements of HCCS. (authors)

  16. Gary No. 13 blast furnace achieves 400 lbs/THM coal injection in 9 months

    SciTech Connect (OSTI)

    Sherman, G.J.; Schuett, K.J.; White, D.G.; O`Donnell, E.M. [U.S. Steel Group, Gary, IN (United States)

    1995-12-01

    Number 13 Blast Furnace at Gary began injecting Pulverized Coal in March 1993. The injection level was increased over the next nine months until a level off 409 lbs/THM was achieved for the month of December 1993. Several major areas were critical in achieving this high level of Pulverized coal injection (PCI) including furnace conditions, lance position, tuyere blockage, operating philosophy, and outages. The paper discusses the modifications made to achieve this level of injection. This injection level decreased charged dry coke rate from 750 lbs/THM to about 625 lbs/THM, while eliminating 150 lbs/THM of oil and 20 lbs/THM of natural gas. Assuming a 1.3 replacement ratio for an oil/natural gas mixture, overall coke replacement for the coal is about 0.87 lbs coke/lbs coal. Gary Works anticipates levels of 500 lbs/THM are conceivable.

  17. An investigation of factors affecting intersection control by volume density actuated equipment 

    E-Print Network [OSTI]

    Radke, Milton L

    1966-01-01

    to the extendible portion when there are cars waiting on the opposite phase. The maximum green timing is initiated by a single vehicle call on the opposing phase. The maximum circuit also operates as a safety circuit to prevent the controller from hanging up... Actuation Passage Time Maximum Green Extension. Clearance Interval Time Waiting Against the Red Number of Cars Waiting Against the Red Platoon Carryover Density 7 8 8 9 9 9 10 11 STUDY PROCEDURE A. Non-Gap Associated Features Minimum Green...

  18. Challenges and Opportunities To Achieve 50% Energy Savings in Homes. National Laboratory White Papers

    SciTech Connect (OSTI)

    Bianchi, Marcus V.A.

    2011-07-01

    This report summarizes the key opportunities, gaps, and barriers identified by researchers from four national laboratories (Lawrence Berkeley National Laboratory, National Renewable Energy Laboratory, Oak Ridge National Laboratory, and Pacific Northwest National Laboratory) that must be addressed to achieve the longer term 50% saving goal for Building America to ensure coordination with the Building America industry teams who are focusing their research on systems to achieve the near-term 30% savings goal. Although new construction was included, the focus of the effort was on deep energy retrofits of existing homes.

  19. Skinner-Rusk Unified Formalism for Optimal Control Systems and Applications

    E-Print Network [OSTI]

    M. Barbero-Liñan; A. Echeverria-Enriquez; D. Martin de Diego; M. C. Muñoz-Lecanda; N. Roman-Roy

    2007-10-18

    A geometric approach to time-dependent optimal control problems is proposed. This formulation is based on the Skinner and Rusk formalism for Lagrangian and Hamiltonian systems. The corresponding unified formalism developed for optimal control systems allows us to formulate geometrically the necessary conditions given by Pontryagin's Maximum Principle, provided that the differentiability with respect to controls is assumed and the space of controls is open. Furthermore, our method is also valid for implicit optimal control systems and, in particular, for the so-called descriptor systems (optimal control problems including both differential and algebraic equations).

  20. Thermal Control & System Integration

    Broader source: Energy.gov [DOE]

    The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies....