Sample records for minimum maximum cell

  1. Minimum Entangling Power is Close to Its Maximum

    E-Print Network [OSTI]

    Jianxin Chen; Zhengfeng Ji; David W Kribs; Bei Zeng

    2012-10-04T23:59:59.000Z

    Given a quantum gate $U$ acting on a bipartite quantum system, its maximum (average, minimum) entangling power is the maximum (average, minimum) entanglement generation with respect to certain entanglement measure when the inputs are restricted to be product states. In this paper, we mainly focus on the 'weakest' one, i.e., the minimum entangling power, among all these entangling powers. We show that, by choosing von Neumann entropy of reduced density operator or Schmidt rank as entanglement measure, even the 'weakest' entangling power is generically very close to its maximal possible entanglement generation. In other words, maximum, average and minimum entangling powers are generically close. We then study minimum entangling power with respect to other Lipschitiz-continuous entanglement measures and generalize our results to multipartite quantum systems. As a straightforward application, a random quantum gate will almost surely be an intrinsically fault-tolerant entangling device that will always transform every low-entangled state to near-maximally entangled state.

  2. 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

  3. Tree-ring reconstruction of maximum and minimum temperatures

    E-Print Network [OSTI]

    , minimum temperatures, diurnal temperature range, changing tree-ring/climate relationships, b; Vaganov et al. 1999; Bar- ber et al. 2000; Lloyd, Fastie 2002). Similar changes during investigations of tree- ring growth/climate relationships in interior British Columbia (BC

  4. On the minimum and maximum mass of neutron stars and the delayed collapse

    E-Print Network [OSTI]

    Strobel, K; Strobel, Klaus; Weigel, Manfred K.

    2001-01-01T23:59:59.000Z

    The minimum and maximum mass of protoneutron stars and neutron stars are investigated. The hot dense matter is described by relativistic (including hyperons) and non-relativistic equations of state. We show that the minimum mass ($\\sim$ 0.88 - 1.28 $M_{\\sun}$) of a neutron star is determined by the earliest stage of its evolution and is nearly unaffected by the presence of hyperons. The maximum mass of a neutron star is limited by the protoneutron star or hot neutron star stage. Further we find that the delayed collapse of a neutron star into a black hole during deleptonization is not only possible for equations of state with softening components, as for instance, hyperons, meson condensates etc., but also for neutron stars with a pure nucleonic-leptonic equation of state.

  5. On the minimum and maximum mass of neutron stars and the delayed collapse

    E-Print Network [OSTI]

    Klaus Strobel; Manfred K. Weigel

    2000-12-14T23:59:59.000Z

    The minimum and maximum mass of protoneutron stars and neutron stars are investigated. The hot dense matter is described by relativistic (including hyperons) and non-relativistic equations of state. We show that the minimum mass ($\\sim$ 0.88 - 1.28 $M_{\\sun}$) of a neutron star is determined by the earliest stage of its evolution and is nearly unaffected by the presence of hyperons. The maximum mass of a neutron star is limited by the protoneutron star or hot neutron star stage. Further we find that the delayed collapse of a neutron star into a black hole during deleptonization is not only possible for equations of state with softening components, as for instance, hyperons, meson condensates etc., but also for neutron stars with a pure nucleonic-leptonic equation of state.

  6. Cell development obeys maximum Fisher information

    E-Print Network [OSTI]

    B. R. Frieden; R. A. Gatenby

    2014-04-29T23:59:59.000Z

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

    SciTech Connect (OSTI)

    Thomas, L.C.

    1994-10-01T23:59:59.000Z

    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.

  8. OPTIMIZED FUEL INJECTOR DESIGN FOR MAXIMUM IN-FURNACE NOx REDUCTION AND MINIMUM UNBURNED CARBON

    SciTech Connect (OSTI)

    A.F. SAROFIM; BROWN UNIVERSITY. R.A. LISAUSKAS; D.B. RILEY, INC.; E.G. EDDINGS; J. BROUWER; J.P. KLEWICKI; K.A. DAVIS; M.J. BOCKELIE; M.P. HEAP; REACTION ENGINEERING INTERNATIONAL. D.W. PERSHING; UNIVERSITY OF UTAH. R.H. HURT

    1998-01-01T23:59:59.000Z

    Reaction Engineering International (REI) has established a project team of experts to develop a technology for combustion systems which will minimize NO x emissions and minimize carbon in the fly ash. This much need technology will allow users to meet environmental compliance and produce a saleable by-product. This study is concerned with the NO x control technology of choice for pulverized coal fired boilers, ?in-furnace NO x control,? which includes: staged low-NO x burners, reburning, selective non-catalytic reduction (SNCR) and hybrid approaches (e.g., reburning with SNCR). The program has two primary objectives: 1) To improve the performance of ?in-furnace? NO x control processes. 2) To devise new, or improve existing, approaches for maximum ?in-furnace? NO x control and minimum unburned carbon. The program involves: 1) fundamental studies at laboratory- and bench-scale to define NO reduction mechanisms in flames and reburning jets; 2) laboratory experiments and computer modeling to improve our two-phase mixing predictive capability; 3) evaluation of commercial low-NO x burner fuel injectors to develop improved designs, and 4) demonstration of coal injectors for reburning and low-NO x burners at commercial scale. The specific objectives of the two-phase program are to: 1 Conduct research to better understand the interaction of heterogeneous chemistry and two phase mixing on NO reduction processes in pulverized coal combustion. 2 Improve our ability to predict combusting coal jets by verifying two phase mixing models under conditions that simulate the near field of low-NO x burners. 3 Determine the limits on NO control by in-furnace NO x control technologies as a function of furnace design and coal type. 5 Develop and demonstrate improved coal injector designs for commercial low-NO x burners and coal reburning systems. 6 Modify the char burnout model in REI?s coal combustion code to take account of recently obtained fundamental data on char reactivity during the late stages of burnout. This will improve our ability to predict carbon burnout with low-NO x firing systems.

  9. Statistical Analysis and Time Series Models for Minimum/Maximum Temperatures

    E-Print Network [OSTI]

    Sidorov, Nikita

    temperatures, thereby reducing the adverse effect of global warming in the Antarctic Peninsula. Keywords that the observed increase in the minimum temperatures is a consequence of human activity rather than natural causes

  10. Maximum-rate, Minimum-Decoding-Complexity STBCs from Clifford Algebras

    E-Print Network [OSTI]

    Karmakar, Sanjay

    2007-01-01T23:59:59.000Z

    It is well known that Space-Time Block Codes (STBCs) from orthogonal designs (ODs) are single-symbol decodable/symbol-by-symbol decodable (SSD) and are obtainable from unitary matrix representations of Clifford algebras. However, SSD codes are obtainable from designs that are not orthogonal also. Recently, two such classes of SSD codes have been studied: (i) Coordinate Interleaved Orthogonal Designs (CIODs) and (ii) Minimum-Decoding-Complexity (MDC) STBCs from Quasi-ODs (QODs). Codes from ODs, CIODs and MDC-QODs are mutually non-intersecting classes of codes. The class of CIODs have {\\it non-unitary weight matrices} when written as a Linear Dispersion Code (LDC) proposed by Hassibi and Hochwald, whereas several known SSD codes including CODs have {\\it unitary weight matrices}. In this paper, we obtain SSD codes with unitary weight matrices (that are not CODs) called Clifford Unitary Weight SSDs (CUW-SSDs) from matrix representations of Clifford algebras. A main result of this paper is the derivation of an ach...

  11. 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

    2010-05-03T23:59:59.000Z

    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.

  12. We study the continuous extractive distillation of minimum and maximum boiling azeotropic mixtures A-B with a heavy or a light entrainer E, intending to assess its feasibility based on thermodynamic insights.

    E-Print Network [OSTI]

    Mailhes, Corinne

    #12;#12;Abstract We study the continuous extractive distillation of minimum and maximum boiling on operating parameters: distillate product purity and recovery, reflux ratio R and entrainer ­ feed flow rate. For the 1.0-2 class both A and B can be distillated. For one of them there exists a maximum entrainer - feed

  13. Maximum output at minimum cost

    E-Print Network [OSTI]

    Firestone, Jeremy

    University) + FFA-W3 Material Preimpregnated epoxy glass fiber + carbon fiber Total blade weight 5,800 kg.0 MW wind turbine generator uses the "total lightning protection" system, in accordance with standard working life of the turbine. Gamesa WindNet® The new generation SCADA System (a wind farm control system

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

    E-Print Network [OSTI]

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

    2010-01-01T23:59:59.000Z

    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 and reduces the solar cell...

  15. 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

    2010-08-30T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Vaudrey, A; Lanzetta, F; Glises, R

    2009-01-01T23:59:59.000Z

    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.

  17. Lesson 33 Maximum and minimum geometry problems

    E-Print Network [OSTI]

    2013-11-06T23:59:59.000Z

    Nov 6, 2013 ... There are four critical points: x = 0, ... are three critical points: x = 0,4,10. .... $0.20 per square inch and the material for the bottom costs $0.50 ...

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

    E-Print Network [OSTI]

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

    2010-01-01T23:59:59.000Z

    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 ...

  19. Design of high-ionic conductivity electrodes for direct methanol fuel cells

    E-Print Network [OSTI]

    Schrauth, Anthony J

    2011-01-01T23:59:59.000Z

    Carbon-supported porous electrodes are used in low-temperature fuel cells to provide maximum catalyst surface area, while taking up little volume and using minimum catalyst material. In Direct Methanol Fuel Cells (DMFCs), ...

  20. Maximum and minimum sensitizable timing analysis using data dependent delays

    E-Print Network [OSTI]

    Singh, Karandeep

    2007-09-17T23:59:59.000Z

    NAND gate that cause its output to switch Rising Transition # ab ! ab Delay(ps) 1 11 ! 00 30.5 2 11 ! 01 50.5 3 11 ! 10 53.0 Falling Transition # ab ! ab Delay(ps) 1 00 ! 11 55.3 2 01 ! 11 46.5 3 10 ! 11 42.7 Output FallingOutput Rising 30.5 42.7 46... effectively goes through the tran- sition 11 ! 01 ! 00 rather than 11 ! 00 directly. Note that the output of the NAND2 gate 13 10ps 35ps 60.5ps 30.5ps 50.5ps 55.3ps 42.7ps 10ps 35ps 77.7ps b) Rising Output a) Falling Output b a c b a c a b c Fig. II.3. Example...

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

    E-Print Network [OSTI]

    Columbia University

    Recycling (incl. composting) Waste-to Energy Landfi ll #12;16 Treatment of Municipal Solid Waste in the EU 27 in 2006 Source: EUROSTAT 41% of Municipal Solid Waste across the EU 27 is still landfilled Rylander, CEO SYSAV, South Scania Waste Company, Sweden #12;2 The Waste Problem can only be solved

  2. Table 10.1 Nonswitchable Minimum and Maximum Consumption, 2002

    U.S. Energy Information Administration (EIA) 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 onYou are nowTotal" (Percent) Type: Sulfur Content API Gravity Period: Monthly AnnualConnecticut"Montana"Oregon"UnitedWyoming" "megawatthours"

  3. THE MINIMUM FREE ENERGY FOR CONTINUOUS SPECTRUM MATERIALS

    E-Print Network [OSTI]

    Deseri, Luca

    THE MINIMUM FREE ENERGY FOR CONTINUOUS SPECTRUM MATERIALS L. DESERI AND J.M. GOLDEN Abstract. A general closed expression is given for the isothermal minimum free energy of a linear viscoelastic states [6] are uniquely related to histories and the work function is the maximum free energy

  4. The Minimum Price Contract

    E-Print Network [OSTI]

    Waller, Mark L.; Amosson, Stephen H.; Welch, Mark; Dhuyvetter, Kevin C.

    2008-10-17T23:59:59.000Z

    , he can Mark Waller, Steve Amosson, Mark Welch, and Kevin Dhuyvetter* 2 lock in a floor price and still have upside poten- tial if the market rallies. Options-based marketing strategies, such as the minimum price contract, work well in times...

  5. MELE: Maximum Entropy Leuven Estimators

    E-Print Network [OSTI]

    Paris, Quirino

    2001-01-01T23:59:59.000Z

    of the Generalized Maximum Entropy Estimator of the Generaland Douglas Miller, Maximum Entropy Econometrics, Wiley andCalifornia Davis MELE: Maximum Entropy Leuven Estimators by

  6. Maximum Parsimony and Maximum Likelihood Methods Comparisons and Bootstrap Tests

    E-Print Network [OSTI]

    Qiu, Weigang

    Maximum Parsimony and Maximum Likelihood Methods Comparisons and Bootstrap Tests Character Likelihood Methods Comparisons and Bootstrap Tests Character Reconstruction PHYLIP and T-REX Exercises Outline 1 Maximum Parsimony and Maximum Likelihood 2 Methods Comparisons and Bootstrap Tests 3 Character

  7. Maximum Entropy Correlated Equilibria

    E-Print Network [OSTI]

    Ortiz, Luis E.

    2006-03-20T23:59:59.000Z

    We study maximum entropy correlated equilibria in (multi-player)games and provide two gradient-based algorithms that are guaranteedto converge to such equilibria. Although we do not provideconvergence rates for these ...

  8. university-logo Maximum likelihood

    E-Print Network [OSTI]

    McCullagh, Peter

    university-logo Maximum likelihood Applications and examples REML and residual likelihood Peter McCullagh REML #12;university-logo Maximum likelihood Applications and examples JAN: Some personal remarks... IC #12;university-logo Maximum likelihood Applications and examples Outline 1 Maximum likelihood REML

  9. MINIMUM SECURITY REQUIREMENTS FOR FEDERAL

    E-Print Network [OSTI]

    March 2006 MINIMUM SECURITY REQUIREMENTS FOR FEDERAL INFORMATION AND INFORMATION SYSTEMS: FEDERAL INFORMATION PROCESSING STANDARD (FIPS) 200 APPROVED BY THE SECRETARY OF COMMERCE MINIMUM SECURITY REQUIREMENTS BY THE SECRETARY OF COMMERCE Shirley Radack, EditorShirley Radack, Editor Computer Security Division

  10. Minimum Stream Flow Standards (Connecticut)

    Broader source: Energy.gov [DOE]

    These regulations apply to all dams and structures which impound or divert waters on rivers or their tributaries, with some exceptions. The regulations set standards for minimum flow (listed in the...

  11. Minimum Gas Service Standards (Ohio)

    Broader source: Energy.gov [DOE]

    Natural gas companies in Ohio are required to follow the Minimum Gas Service Standards, which are set and enforced by the Public Utilities Commission of Ohio. These rules are found in chapter 4901...

  12. Tissue Radiation Response with Maximum Tsallis Entropy

    SciTech Connect (OSTI)

    Sotolongo-Grau, O.; Rodriguez-Perez, D.; Antoranz, J. C.; Sotolongo-Costa, Oscar [UNED, Departamento de Fisica Matematica y de Fluidos, 28040 Madrid (Spain); UNED, Departamento de Fisica Matematica y de Fluidos, 28040 Madrid (Spain) and University of Havana, Catedra de Sistemas Complejos Henri Poincare, Havana 10400 (Cuba); University of Havana, Catedra de Sistemas Complejos Henri Poincare, Havana 10400 (Cuba)

    2010-10-08T23:59:59.000Z

    The expression of survival factors for radiation damaged cells is currently based on probabilistic assumptions and experimentally fitted for each tumor, radiation, and conditions. Here, we show how the simplest of these radiobiological models can be derived from the maximum entropy principle of the classical Boltzmann-Gibbs expression. We extend this derivation using the Tsallis entropy and a cutoff hypothesis, motivated by clinical observations. The obtained expression shows a remarkable agreement with the experimental data found in the literature.

  13. Some interesting consequences of the maximum entropy production principle

    SciTech Connect (OSTI)

    Martyushev, L. M. [Russian Academy of Sciences, Institute of Industrial Ecology, Ural Division (Russian Federation)], E-mail: mlm@ecko.uran.ru

    2007-04-15T23:59:59.000Z

    Two nonequilibrium phase transitions (morphological and hydrodynamic) are analyzed by applying the maximum entropy production principle. Quantitative analysis is for the first time compared with experiment. Nonequilibrium crystallization of ice and laminar-turbulent flow transition in a circular pipe are examined as examples of morphological and hydrodynamic transitions, respectively. For the latter transition, a minimum critical Reynolds number of 1200 is predicted. A discussion of this important and interesting result is presented.

  14. Achieve maximum application availability and

    E-Print Network [OSTI]

    Bernstein, Phil

    Highlights Achieve maximum application availability and data protection using SQL Server AlwaysOn and other high availability features Reduce planned downtime significantly with SQL Server on Windows and management of high availability and disaster recovery using integrated tools Achieve maximum application

  15. "Table A52. Nonswitchable Minimum Requirements and Maximum Consumption"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. AppliancesTotal"1" " (Estimates5.6.8.1.2.

  16. Title 43 CFR 3206.12 What are the Minimum and Maximum Lease Sizes? | Open

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolarTharaldson EthanolTillson,OpenOpen|AmendmentThat Were Not SoldEnergy

  17. R Coronae Borealis Stars at Minimum Light -- UW Cen

    E-Print Network [OSTI]

    N. Kameswara Rao; B. E. Reddy; D. L. Lambert

    2004-09-09T23:59:59.000Z

    Two high-resolution optical spectra of the R Coronae Borealis star UW Cen in decline are discussed. A spectrum from mid-1992 when the star had faded by three magnitudes shows just a few differences with the spectrum at maximum light. The ubiquitous sharp emission lines seen in R CrB at a similar drop below maximum light are absent. In contrast, a spectrum from mid-2002 when the star was five magnitudes below maximum light shows an array of sharp emission lines and a collection of broad emission lines. Comparisons are made with spectra of R CrB obtained during the deep 1995-1996 minimum. The many common features are discussed in terms of a torus-jet geometry.

  18. GMTI radar minimum detectable velocity.

    SciTech Connect (OSTI)

    Richards, John Alfred

    2011-04-01T23:59:59.000Z

    Minimum detectable velocity (MDV) is a fundamental consideration for the design, implementation, and exploitation of ground moving-target indication (GMTI) radar imaging modes. All single-phase-center air-to-ground radars are characterized by an MDV, or a minimum radial velocity below which motion of a discrete nonstationary target is indistinguishable from the relative motion between the platform and the ground. Targets with radial velocities less than MDV are typically overwhelmed by endoclutter ground returns, and are thus not generally detectable. Targets with radial velocities greater than MDV typically produce distinct returns falling outside of the endoclutter ground returns, and are thus generally discernible using straightforward detection algorithms. This document provides a straightforward derivation of MDV for an air-to-ground single-phase-center GMTI radar operating in an arbitrary geometry.

  19. Original article Restricted maximum likelihood

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Original article Restricted maximum likelihood estimation of covariances in sparse linear models on the simplex algorithm of Nelder and Mead [40]. Kovac [29] made modifications that turned it into a stable

  20. On Cartesian trees and range minimum queries

    E-Print Network [OSTI]

    Demaine, Erik D.

    We present new results on Cartesian trees with applications in range minimum queries and bottleneck edge queries. We introduce a cache-oblivious Cartesian tree for solving the range minimum query problem, a Cartesian tree ...

  1. Multiple criteria minimum spanning trees Pedro Cardoso

    E-Print Network [OSTI]

    Coello, Carlos A. Coello

    Multiple criteria minimum spanning trees Pedro Cardoso M´ario Jesus ´Alberto M´arquez Abstract The NP multiple criteria minimum spanning tree as several applications into the network design problems criteria minimum spanning trees. There are several geometric network design and application problems

  2. Maximum likelihood estimation for cooperative sequential adsorption

    E-Print Network [OSTI]

    Burton, Geoffrey R.

    Maximum likelihood estimation for cooperative sequential adsorption Mathew D. Penrose and Vadim;Maximum likelihood estimation for cooperative sequential adsorption M.D. Penrose, Department of the region. Keywords: cooperative sequential adsorption, space-time point pro- cess, maximum likelihood

  3. Estimating a mixed strategy employing maximum entropy

    E-Print Network [OSTI]

    Golan, Amos; Karp, Larry; Perloff, Jeffrey M.

    1996-01-01T23:59:59.000Z

    MIXED STRATEGY EMPLOYING MAXIMUM ENTROPY by Amos Golan LarryMixed Strategy Employing Maximum Entropy Amos Golan Larry S.Abstract Generalized maximum entropy may be used to estimate

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

    Energy Savers [EERE]

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

  5. Hazardous Waste Minimum Distance Requirements (Connecticut)

    Broader source: Energy.gov [DOE]

    These regulations set minimum distance requirements between certain types of facilities that generate, process, store, and dispose of hazardous waste and other land uses. The regulations require an...

  6. Knots and Minimum Distance Energy Rosanna Speller

    E-Print Network [OSTI]

    Denne, Elizabeth

    Knots and Minimum Distance Energy Rosanna Speller (Dated: May 11, 2008) Professor Elizabeth Denne have least Minimum Distance Energy. I previously showed that the energy is minimized for convex polygons. We hope relating the energy to chords of polygons will be a helpful step towards showing

  7. Minimum Time/Minimum Fuel Control of an Axisymmetric Rigid Body

    E-Print Network [OSTI]

    Torres, Jonathan Farina

    2014-05-19T23:59:59.000Z

    Many times it is necessary to reorient an aerial vehicle during flight in a minimum time or minimum fuel fashion. This thesis will present a minimum time/fuel control solution to reorienting an axisymmetric rigid body using eigenaxis maneuvers. Any...

  8. HFIR Vessel Maximum Permissible Pressures for Operating Period 26 to 50 EFPY (100 MW)

    SciTech Connect (OSTI)

    Cheverton, R.D.; Inger, J.R.

    1999-01-01T23:59:59.000Z

    Extending the life of the HFIR pressure vessel from 26 to 50 EFPY (100 MW) requires an updated calculation of the maximum permissible pressure for a range in vessel operating temperatures (40-120 F). The maximum permissible pressure is calculated using the equal-potential method, which takes advantage of knowledge gained from periodic hydrostatic proof tests and uses the test conditions (pressure, temperature, and frequency) as input. The maximum permissible pressure decreases with increasing time between hydro tests but is increased each time a test is conducted. The minimum values that occur just prior to a test either increase or decrease with time, depending on the vessel temperature. The minimum value of these minimums is presently specified as the maximum permissible pressure. For three vessel temperatures of particular interest (80, 88, and 110 F) and a nominal time of 3.0 EFPY(100 MVV)between hydro tests, these pressures are 677, 753, and 850 psi. For the lowest temperature of interest (40 F), the maximum permissible pressure is 295 psi.

  9. IDW interpolation we set all boundary values to a minimum peat thickness of 50 cm. For the calculation we used cell size 100 m, nearest neighbour, power 2 and no barriers. For loss

    E-Print Network [OSTI]

    Dumberry, Mathieu

    . For the calculation we used cell size 100 m, nearest neighbour, power 2 and no barriers. For loss of peat thickness and Drought Final Report, Annex 1 and 2, Planning for Fire Prevention and Drought Management Project (Asian. & Radojevic, M.) 52­66 (Nova Science, New York, 2000). 12. Bompard, J. M. & Guizol, P. Land Management

  10. Minimum Energy Diagrams for Multieffect Distillation Arrangements

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Minimum Energy Diagrams for Multieffect Distillation Arrangements Hilde K. Engelien and Sigurd distillation arrangements for separating a ternary mixture have been considered. The focus is on a heat-integrated complex distillation configuration, called a multieffect prefractionator arrangement. The comparison

  11. Microbial oceanography of anoxic oxygen minimum zones

    E-Print Network [OSTI]

    Ulloa, Osvaldo

    Vast expanses of oxygen-deficient and nitrite-rich water define the major oxygen minimum zones (OMZs) of the global ocean. They support diverse microbial communities that influence the nitrogen economy of the oceans, ...

  12. Maximum entropy principal for transportation

    SciTech Connect (OSTI)

    Bilich, F. [University of Brasilia (Brazil); Da Silva, R. [National Research Council (Brazil)

    2008-11-06T23:59:59.000Z

    In this work we deal with modeling of the transportation phenomenon for use in the transportation planning process and policy-impact studies. The model developed is based on the dependence concept, i.e., the notion that the probability of a trip starting at origin i is dependent on the probability of a trip ending at destination j given that the factors (such as travel time, cost, etc.) which affect travel between origin i and destination j assume some specific values. The derivation of the solution of the model employs the maximum entropy principle combining a priori multinomial distribution with a trip utility concept. This model is utilized to forecast trip distributions under a variety of policy changes and scenarios. The dependence coefficients are obtained from a regression equation where the functional form is derived based on conditional probability and perception of factors from experimental psychology. The dependence coefficients encode all the information that was previously encoded in the form of constraints. In addition, the dependence coefficients encode information that cannot be expressed in the form of constraints for practical reasons, namely, computational tractability. The equivalence between the standard formulation (i.e., objective function with constraints) and the dependence formulation (i.e., without constraints) is demonstrated. The parameters of the dependence-based trip-distribution model are estimated, and the model is also validated using commercial air travel data in the U.S. In addition, policy impact analyses (such as allowance of supersonic flights inside the U.S. and user surcharge at noise-impacted airports) on air travel are performed.

  13. Maximum-likelihood density modification

    SciTech Connect (OSTI)

    Terwilliger, Thomas C., E-mail: terwilliger@lanl.gov [Structural Biology Group, Mail Stop M888, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2000-08-01T23:59:59.000Z

    A likelihood-based density modification approach is developed that can incorporate expected electron-density information from a wide variety of sources. A likelihood-based approach to density modification is developed that can be applied to a wide variety of cases where some information about the electron density at various points in the unit cell is available. The key to the approach consists of developing likelihood functions that represent the probability that a particular value of electron density is consistent with prior expectations for the electron density at that point in the unit cell. These likelihood functions are then combined with likelihood functions based on experimental observations and with others containing any prior knowledge about structure factors to form a combined likelihood function for each structure factor. A simple and general approach to maximizing the combined likelihood function is developed. It is found that this likelihood-based approach yields greater phase improvement in model and real test cases than either conventional solvent flattening and histogram matching or a recent reciprocal-space solvent-flattening procedure [Terwilliger (1999 ?), Acta Cryst. D55, 1863–1871].

  14. Reduction in maximum time uncertainty of paired time signals

    DOE Patents [OSTI]

    Theodosiou, George E. (West Chicago, IL); Dawson, John W. (Clarendon Hills, IL)

    1983-01-01T23:59:59.000Z

    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 .ltoreq.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 20-800.

  15. Reduction in maximum time uncertainty of paired time signals

    DOE Patents [OSTI]

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

    1983-10-04T23:59:59.000Z

    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][<=]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--800. 6 figs.

  16. Reduction in maximum time uncertainty of paired time signals

    DOE Patents [OSTI]

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

    1981-02-11T23:59:59.000Z

    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.

  17. ITP Steel: Theoretical Minimum Energies to Produce Steel for...

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

    Theoretical Minimum Energies to Produce Steel for Selected Conditions, March 2000 ITP Steel: Theoretical Minimum Energies to Produce Steel for Selected Conditions, March 2000...

  18. Optimization Online - Efficient Heuristic Algorithms for Maximum ...

    E-Print Network [OSTI]

    T. G. J. Myklebust

    2012-11-19T23:59:59.000Z

    Nov 19, 2012 ... Efficient Heuristic Algorithms for Maximum Utility Product Pricing Problems. T. G. J. Myklebust(tmyklebu ***at*** csclub.uwaterloo.ca)

  19. Minimum Energy Accumulative Routing in Wireless Networks

    E-Print Network [OSTI]

    Sundaram, Ravi

    Minimum Energy Accumulative Routing in Wireless Networks Jiangzhuo Chen, Lujun Jia, Xin Liu to address the energy efficient routing problem in multi-hop wireless networks with accumulative relay. In the accumulative relay model, partially overheard signals of previous transmis- sions for the same packet are used

  20. Maximum Theoretical Efficiency Limit of Photovoltaic Devices: Effect of Band Structure on Excited State Entropy

    E-Print Network [OSTI]

    Osterloh, Frank

    Maximum Theoretical Efficiency Limit of Photovoltaic Devices: Effect of Band Structure on Excited a theoretical limit for the maximum energy conversion efficiency of single junction photovoltaic cells for the efficiency variations observed for real photovoltaic devices today.4-6 Here, we show that the extractable

  1. Maximum-Power-Point Tracking Method of Photovoltaic Using Only Single Current Sensor

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    » «Solar cell systems» Abstract This paper describes a novel strategy of maximum-power-point tracking point using only a single current sensor, i.e., a Hall-effect CT. Output power of the photovoltaic can-climbing method is employed to seek the maximum power point, using the output power obtained from only the current

  2. Parametric and Kinetic Minimum Spanning Trees Pankaj K. Agarwal 1

    E-Print Network [OSTI]

    Eppstein, David

    Parametric and Kinetic Minimum Spanning Trees Pankaj K. Agarwal 1 David Eppstein 2 Leonidas J. Guibas 3 Monika R. Henzinger 4 Abstract We consider the parametric minimum spanning tree problem- pute the sequence of minimum spanning trees generated as varies. We also consider the kinetic minimum

  3. Relationships between the AE, ap and Dst indices near solar minimum (1974) and at solar maximum (1979)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1974-01-01T23:59:59.000Z

    during geomagnetic storms, when the in¯uence of the ring current is dominant. The correlation of ap ´ Dst of AL and AU is called AE. Introduced in 1964, the ring-current index Dst measures primarily the ring-current-hourly average values of the Dst, AE and ap geomagnetic activity indices have been studied for 1 year's duration

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

    E-Print Network [OSTI]

    Letschert, Virginie

    2010-01-01T23:59:59.000Z

    Administration, Annual Energy Outlook 2010 with Projectionsis taken from the annual energy outlook (AEO) 2010 (DOE/EIA-

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

    E-Print Network [OSTI]

    Letschert, Virginie

    2010-01-01T23:59:59.000Z

    central air conditioners, water heaters and furnaces) areair conditioners, water heaters and furnaces) UnregulatedM i l l o 10 i n s 2. Water Heaters DOE has issued a final

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

    E-Print Network [OSTI]

    Letschert, Virginie

    2010-01-01T23:59:59.000Z

    air conditioners, water heaters and furnaces) are modeledair conditioners, water heaters and furnaces) UnregulatedBAT option for electric water heater and condensing water

  7. TABLE 3.-Statistics of length-weight relations for all data used in study. Number Mean Minimum Maximum

    E-Print Network [OSTI]

    pelamis (Linnaeus), in North Carolina waters. Chesa- peake Sci. 13:237-244. BEARDSLEY, G. L., JR., AND W pelamis) from the Eastern Tropical Pacific Ocean. Bull. Inter-Am. Trop. Tuna Comm. 3:307- 352. PIENAAR, L

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

    E-Print Network [OSTI]

    Letschert, Virginie

    2010-01-01T23:59:59.000Z

    Energy Consumption Survey (RECS) 2005 (EIA, 2009), whichEIA-0383(2010)) Energy Information Administration, Residential Energy Consumption Survey:

  9. Minimum and terminal velocities in projectile motion

    E-Print Network [OSTI]

    E. N. Miranda; S. Nikolskaya; R. Riba

    2012-08-13T23:59:59.000Z

    The motion of a projectile with horizontal initial velocity V0, moving under the action of the gravitational field and a drag force is studied analytically. As it is well known, the projectile reaches a terminal velocity Vterm. There is a curious result concerning the minimum speed Vmin; it turns out that the minimum velocity is lower than the terminal one if V0 > Vterm and is lower than the initial one if V0 < Vterm. These results show that the velocity is not a monotonous function. If the initial speed is not horizontal, there is an angle range where the velocity shows the same behavior mentioned previously. Out of that range, the volocity is a monotonous function. These results come out from numerical simulations.

  10. Maximum entropy segmentation of broadcast news 

    E-Print Network [OSTI]

    Christensen, Heidi; Kolluru, BalaKrishna; Gotoh, Yoshihiko; Renals, Steve

    2005-01-01T23:59:59.000Z

    speech recognizer and subsequently segmenting the text into utterances and topics. A maximum entropy approach is used to build statistical models for both utterance and topic segmentation. The experimental work addresses the effect on performance...

  11. Fast singular value decomposition combined maximum entropy method for plasma tomography

    SciTech Connect (OSTI)

    Kim, Junghee; Choe, W. [Department of Physics, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701(Korea, Republic of)

    2006-02-15T23:59:59.000Z

    The maximum entropy method (MEM) is a widely used reconstruction algorithm in plasma physics. Drawbacks of the conventional MEM are its heavy time-consuming process and possible generation of noisy reconstruction results. In this article, a modified maximum entropy algorithm is described which speeds up the calculation and shows better noise handling capability. Similar to the rapid minimum Fisher information method, the modified maximum entropy algorithm uses simple matrix operations instead of treating a fully nonlinear problem. The preprocess for rapid tomographic calculation is based on the vector operations and the singular value decomposition (SVD). The initial guess of the sought-for emissivity is calculated by SVD and this helped reconstruction about ten times faster than the conventional MEM. Therefore, the developed fast MEM can be used for intershot tomographic analyses of fusion plasmas.

  12. PETM: Paleocene-Eocene Thermal Maximum

    E-Print Network [OSTI]

    Kammer, Thomas

    of 18O/16O, relative to a standard. Typically measured in CaCO3. Background ratio is 1:500. · 13C means carbon compound, including CaCO3. Background ratio is 1:99. #12;Stable Isotope Basics · 18O =billion metric tons Minimum released to dissolve CaCO3 in oceans Best estimate of CIE, -4.6%o The amount

  13. Approximating the Minimum Spanning Tree Weight in Sublinear Time

    E-Print Network [OSTI]

    Trevisan, Luca

    Approximating the Minimum Spanning Tree Weight in Sublinear Time Bernard Chazelle #3; Ronitt a parameter 0 minimum spanning tree- components algorithm picks O(1=#15; 2 ) vertices in the graph and then grows \\local spanning trees" whose

  14. Using Sparsification for Parametric Minimum Spanning Tree Problems

    E-Print Network [OSTI]

    Eppstein, David

    Using Sparsification for Parametric Minimum Spanning Tree Problems David Fern'andez­Baca 1? , Giora with a parameter. The second is an asymptotically optimal algorithm for the minimum ratio spanning tree problem, as well as other search problems, on dense graphs. 1 Introduction In the parametric minimum spanning tree

  15. Using Sparsification for Parametric Minimum Spanning Tree Problems

    E-Print Network [OSTI]

    Eppstein, David

    Using Sparsification for Parametric Minimum Spanning Tree Problems David Fern´andez-Baca Giora algorithm for the minimum ratio spanning tree problem, as well as other search prob- lems, on dense graphs. 1 Introduction In the parametric minimum spanning tree problem, one is given an n-node, m

  16. Stochastic Minimum Spanning Trees in Euclidean Spaces Pegah Kamousi #

    E-Print Network [OSTI]

    Chan, Timothy M.

    Stochastic Minimum Spanning Trees in Euclidean Spaces Pegah Kamousi # Computer Science University­1­4503­0682­9/11/06 ...$10.00. Keywords Algorithms, Theory General Terms Stochastic Minimum Spanning Trees, Geometric Data and arbitrary but known probability p i . We want to compute the expected length of the minimum spanning tree

  17. On Two-Stage Stochastic Minimum Spanning Kedar Dhamdhere1

    E-Print Network [OSTI]

    Ravi, R.

    On Two-Stage Stochastic Minimum Spanning Trees Kedar Dhamdhere1 , R. Ravi2 , and Mohit Singh2 1}@andrew.cmu.edu Abstract. We consider the undirected minimum spanning tree problem in a stochastic optimization setting algorithm. We then consider the Stochastic minimum spanning tree problem in a more general black-box model

  18. Minimum Cost Data Aggregation with Localized Processing for Statistical Inference

    E-Print Network [OSTI]

    Anandkumar, Animashree

    Minimum Cost Data Aggregation with Localized Processing for Statistical Inference Animashree--The problem of minimum cost in-network fusion of measurements, collected from distributed sensors via multihop, which implies that any Steiner- tree approximation can be employed for minimum cost fusion with the same

  19. Charge-Balanced Minimum-Power Controls for Spiking Neuron Oscillators

    E-Print Network [OSTI]

    Dasanayake, Isuru

    2011-01-01T23:59:59.000Z

    In this paper, we study the optimal control of phase models for spiking neuron oscillators. We focus on the design of minimum-power current stimuli that elicit spikes in neurons at desired times. We furthermore take the charge-balanced constraint into account because in practice undesirable side effects may occur due to the accumulation of electric charge resulting from external stimuli. Charge-balanced minimum-power controls are derived for a general phase model using the maximum principle, where the cases with unbounded and bounded control amplitude are examined. The latter is of practical importance since phase models are more accurate for weak forcing. The developed optimal control strategies are then applied to both mathematically ideal and experimentally observed phase models to demonstrate their applicability, including the phase model for the widely studied Hodgkin-Huxley equations.

  20. Communication: Minimum in the thermal conductivity of supercooled water: A computer simulation study

    SciTech Connect (OSTI)

    Bresme, F., E-mail: f.bresme@imperial.ac.uk [Chemical Physics Section, Department of Chemistry, Imperial College, London SW7 2AZ, United Kingdom and Department of Chemistry, Norwegian University of Science and Technology, Trondheim 7491 (Norway); Biddle, J. W.; Sengers, J. V.; Anisimov, M. A. [Institute for Physical Science and Technology, and Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742 (United States)] [Institute for Physical Science and Technology, and Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742 (United States)

    2014-04-28T23:59:59.000Z

    We report the results of a computer simulation study of the thermodynamic properties and the thermal conductivity of supercooled water as a function of pressure and temperature using the TIP4P-2005 water model. The thermodynamic properties can be represented by a two-structure equation of state consistent with the presence of a liquid-liquid critical point in the supercooled region. Our simulations confirm the presence of a minimum in the thermal conductivity, not only at atmospheric pressure, as previously found for the TIP5P water model, but also at elevated pressures. This anomalous behavior of the thermal conductivity of supercooled water appears to be related to the maximum of the isothermal compressibility or the minimum of the speed of sound. However, the magnitudes of the simulated thermal conductivities are sensitive to the water model adopted and appear to be significantly larger than the experimental thermal conductivities of real water at low temperatures.

  1. Maximum Likelihood Haplotyping for General Pedigrees

    E-Print Network [OSTI]

    Friedman, Nir

    networks. The use of Bayesian networks enables efficient maximum likelihood haplotyping for more complex for the variables of the Bayesian network. The presented optimization algorithm also improves likelihood Analysis, Pedigree, superlink. Abstract Haplotype data is valuable in mapping disease-susceptibility genes

  2. Weak Scale From the Maximum Entropy Principle

    E-Print Network [OSTI]

    Yuta Hamada; Hikaru Kawai; Kiyoharu Kawana

    2014-09-23T23:59:59.000Z

    The theory of multiverse and wormholes suggests that the parameters of the Standard Model are fixed in such a way that the radiation of the $S^{3}$ universe at the final stage $S_{rad}$ becomes maximum, which we call the maximum entropy principle. Although it is difficult to confirm this principle generally, for a few parameters of the Standard Model, we can check whether $S_{rad}$ actually becomes maximum at the observed values. In this paper, we regard $S_{rad}$ at the final stage as a function of the weak scale ( the Higgs expectation value ) $v_{h}$, and show that it becomes maximum around $v_{h}={\\cal{O}}(300\\text{GeV})$ when the dimensionless couplings in the Standard Model, that is, the Higgs self coupling, the gauge couplings, and the Yukawa couplings are fixed. Roughly speaking, we find that the weak scale is given by \\begin{equation} v_{h}\\sim\\frac{T_{BBN}^{2}}{M_{pl}y_{e}^{5}},\

  3. Weak Scale From the Maximum Entropy Principle

    E-Print Network [OSTI]

    Hamada, Yuta; Kawana, Kiyoharu

    2014-01-01T23:59:59.000Z

    The theory of multiverse and wormholes suggests that the parameters of the Standard Model are fixed in such a way that the radiation of the $S^{3}$ universe at the final stage $S_{rad}$ becomes maximum, which we call the maximum entropy principle. Although it is difficult to confirm this principle generally, for a few parameters of the Standard Model, we can check whether $S_{rad}$ actually becomes maximum at the observed values. In this paper, we regard $S_{rad}$ at the final stage as a function of the weak scale ( the Higgs expectation value ) $v_{h}$, and show that it becomes maximum around $v_{h}={\\cal{O}}(300\\text{GeV})$ when the dimensionless couplings in the Standard Model, that is, the Higgs self coupling, the gauge couplings, and the Yukawa couplings are fixed. Roughly speaking, we find that the weak scale is given by \\begin{equation} v_{h}\\sim\\frac{T_{BBN}^{2}}{M_{pl}y_{e}^{5}},\

  4. Integrating Correlated Bayesian Networks Using Maximum Entropy

    SciTech Connect (OSTI)

    Jarman, Kenneth D.; Whitney, Paul D.

    2011-08-30T23:59:59.000Z

    We consider the problem of generating a joint distribution for a pair of Bayesian networks that preserves the multivariate marginal distribution of each network and satisfies prescribed correlation between pairs of nodes taken from both networks. We derive the maximum entropy distribution for any pair of multivariate random vectors and prescribed correlations and demonstrate numerical results for an example integration of Bayesian networks.

  5. QCD Level Density from Maximum Entropy Method

    E-Print Network [OSTI]

    Shinji Ejiri; Tetsuo Hatsuda

    2005-09-24T23:59:59.000Z

    We propose a method to calculate the QCD level density directly from the thermodynamic quantities obtained by lattice QCD simulations with the use of the maximum entropy method (MEM). Understanding QCD thermodynamics from QCD spectral properties has its own importance. Also it has a close connection to phenomenological analyses of the lattice data as well as experimental data on the basis of hadronic resonances. Our feasibility study shows that the MEM can provide a useful tool to study QCD level density.

  6. A global maximum power point tracking DC-DC converter

    E-Print Network [OSTI]

    Duncan, Joseph, 1981-

    2005-01-01T23:59:59.000Z

    This thesis describes the design, and validation of a maximum power point tracking DC-DC converter capable of following the true global maximum power point in the presence of other local maximum. It does this without the ...

  7. articulatorily constrained maximum: Topics by E-print Network

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

    weight spanning forests. Amitabha Bagchi; Ankur Bhargava; Torsten Suel 2005-01-01 27 Maximum Entropy Correlated Equilibria MIT - DSpace Summary: We study maximum entropy...

  8. The Maximum Mass of a Neutron Star

    E-Print Network [OSTI]

    Vassiliki Kalogera; Gordon Baym

    1996-08-11T23:59:59.000Z

    Observational identification of black holes as members of binary systems requires the knowledge of the upper limit on the gravitational mass of a neutron star. We use modern equations of state for neutron star matter, fitted to experimental nucleon-nucleon scattering data and the properties of light nuclei, to calculate, within the framework of Rhoades & Ruffini (1974), the minimum upper limit on a neutron star mass. Regarding the equation of state as valid up to twice nuclear matter saturation density, rho_{nm}, we obtain a secure upper bound on the neutron star mass equal to 2.9 solar masses. We also find that in order to reach the lowest possible upper bound of 2.2 solar masses, we need understand the physical properties of neutron matter up to a density of about 4 times rho_{nm}.

  9. Flammability limits of dusts: Minimum inerting concentrations

    SciTech Connect (OSTI)

    Dastidar, A.G.; Amyotte, P.R. [Dalhousie Univ., Halifax, Nova Scotia (Canada). Dept. of Chemical Engineering] [Dalhousie Univ., Halifax, Nova Scotia (Canada). Dept. of Chemical Engineering; Going, J.; Chatrathi, K. [Fike Corp., Blue Springs, MO (United States)] [Fike Corp., Blue Springs, MO (United States)

    1999-05-01T23:59:59.000Z

    A new flammability limit parameter has been defined as the Minimum Inerting Concentration (MIC). This is the concentration of inertant required to prevent a dust explosion regardless of fuel concentration. Previous experimental work at Fike in a 1-m{sup 3} spherical chamber has shown this flammability limit to exist for pulverized coal dust and cornstarch. In the current work, inerting experiments with aluminum, anthraquinone and polyethylene dusts as fuels were performed, using monoammonium phosphate and sodium bicarbonate as inertants. The results show that an MIC exists only for anthraquinone inerted with sodium bicarbonate. The other combustible dust and inertant mixtures did not show a definitive MIC, although they did show a strong dependence between inerting level and suspended fuel concentration. As the fuel concentration increased, the amount of inertant required to prevent an explosion decreased. Even though a definitive MIC was not found for most of the dusts an effective MIC can be estimated from the data. The use of MIC data can aid in the design of explosion suppression schemes.

  10. An Efficient Algorithm for Computing Robust Minimum Capacity st Cuts

    E-Print Network [OSTI]

    Doug Altner

    2008-03-20T23:59:59.000Z

    Mar 20, 2008 ... In this paper, we present an efficient algorithm for computing minimum capacity s-t cuts under a polyhedral model of robustness. Our algorithm ...

  11. Microbial metatranscriptomics in a permanent marine oxygen minimum zone

    E-Print Network [OSTI]

    Stewart, Frank J.

    Simultaneous characterization of taxonomic composition, metabolic gene content and gene expression in marine oxygen minimum zones (OMZs) has potential to broaden perspectives on the microbial and biogeochemical dynamics ...

  12. anka karlsruhe minimum: Topics by E-print Network

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

    Descrip- tion Length (MDL) principle (Rissanen, 1978, 1987, 1996), and the Minimum Length (MML) principle. Based on this analysis, we present two revised versions of MML: a...

  13. Tungsten Cluster Migration on Nanoparticles: Minimum Energy Pathway...

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

    Pathway and Migration Mechanism. Tungsten Cluster Migration on Nanoparticles: Minimum Energy Pathway and Migration Mechanism. Abstract: Transition state searches have been...

  14. Optimization Online - Guaranteed Minimum-Rank Solutions of ...

    E-Print Network [OSTI]

    Benjamin Recht

    2007-06-28T23:59:59.000Z

    Jun 28, 2007 ... Guaranteed Minimum-Rank Solutions of Linear Matrix Equations via Nuclear Norm Minimization. Benjamin Recht(brecht ***at*** caltech.edu)

  15. Minimum Aberration Blocking Schemes for 128-Run Designs

    E-Print Network [OSTI]

    Xu, Hongquan; Mee, Robert W.

    2010-01-01T23:59:59.000Z

    Split-Plot Fractional Factorial Designs,” Journal of QualityAberration in Blocked Factorial Designs,” Technometrics, 39,Blocked Regular Fractional Factorial Designs With Minimum

  16. Minimum Aberration Blocking Schemes for 128-Run Designs

    E-Print Network [OSTI]

    Hongquan Xu; Robert W. Mee

    2011-01-01T23:59:59.000Z

    Split-Plot Fractional Factorial Designs,” Journal of QualityAberration in Blocked Factorial Designs,” Technometrics, 39,Blocked Regular Fractional Factorial Designs With Minimum

  17. Conductivity maximum in a charged colloidal suspension

    SciTech Connect (OSTI)

    Bastea, S

    2009-01-27T23:59:59.000Z

    Molecular dynamics simulations of a charged colloidal suspension in the salt-free regime show that the system exhibits an electrical conductivity maximum as a function of colloid charge. We attribute this behavior to two main competing effects: colloid effective charge saturation due to counterion 'condensation' and diffusion slowdown due to the relaxation effect. In agreement with previous observations, we also find that the effective transported charge is larger than the one determined by the Stern layer and suggest that it corresponds to the boundary fluid layer at the surface of the colloidal particles.

  18. LANDFILL OPERATION FOR CARBON SEQUESTRATION AND MAXIMUM METHANE EMISSION CONTROL

    SciTech Connect (OSTI)

    Don Augenstein

    2001-02-01T23:59:59.000Z

    The work described in this report, to demonstrate and advance this technology, has used two demonstration-scale cells of size (8000 metric tons [tonnes]), sufficient to replicate many heat and compaction characteristics of larger ''full-scale'' landfills. An enhanced demonstration cell has received moisture supplementation to field capacity. This is the maximum moisture waste can hold while still limiting liquid drainage rate to minimal and safely manageable levels. The enhanced landfill module was compared to a parallel control landfill module receiving no moisture additions. Gas recovery has continued for a period of over 4 years. It is quite encouraging that the enhanced cell methane recovery has been close to 10-fold that experienced with conventional landfills. This is the highest methane recovery rate per unit waste, and thus progress toward stabilization, documented anywhere for such a large waste mass. This high recovery rate is attributed to moisture, and elevated temperature attained inexpensively during startup. Economic analyses performed under Phase I of this NETL contract indicate ''greenhouse cost effectiveness'' to be excellent. Other benefits include substantial waste volume loss (over 30%) which translates to extended landfill life. Other environmental benefits include rapidly improved quality and stabilization (lowered pollutant levels) in liquid leachate which drains from the waste.

  19. Approximating the Minimum Spanning Tree Weight in Sublinear Time

    E-Print Network [OSTI]

    Goldwasser, Shafi

    Approximating the Minimum Spanning Tree Weight in Sublinear Time #3; Bernard Chazelle y Ronitt a parameter 0 minimum span- ning tree in the graph and then grows \\local spanning trees" whose sizes are speci#12;ed by a stochastic process. From

  20. Asymptotically minimum BER linear block precoders for MMSE equalisation

    E-Print Network [OSTI]

    Davidson, Tim

    ) [3]. For a general block transmission scheme, optimal detection requires a joint decisionAsymptotically minimum BER linear block precoders for MMSE equalisation S.S. Chan, T.N. Davidson and K.M. Wong Abstract: An asymptotically minimum bit error rate (BER) linear block precoder

  1. A Counterexample to Additivity of Minimum Output Entropy

    E-Print Network [OSTI]

    M. B. Hastings

    2009-12-30T23:59:59.000Z

    We present a random construction of a pair of channels which gives, with non-zero probability for sufficiently large dimensions, a counterexample to the minimum output entropy conjecture. As shown by Shor, this implies a violation of the additivity conjecture for the classical capacity of quantum channels. The violation of the minimum output entropy conjecture is relatively small.

  2. Maximum screening fields of superconducting multilayer structures

    E-Print Network [OSTI]

    Gurevich, Alex

    2015-01-01T23:59:59.000Z

    It is shown that a multilayer comprised of alternating thin superconducting and insulating layers on a thick substrate can fully screen the applied magnetic field exceeding the superheating fields $H_s$ of both the superconducting layers and the substrate, the maximum Meissner field is achieved at an optimum multilayer thickness. For instance, a dirty layer of thickness $\\sim 0.1\\; \\mu$m at the Nb surface could increase $H_s\\simeq 240$ mT of a clean Nb up to $H_s\\simeq 290$ mT. Optimized multilayers of Nb$_3$Sn, NbN, some of the iron pnictides, or alloyed Nb deposited onto the surface of the Nb resonator cavities could potentially double the rf breakdown field, pushing the peak accelerating electric fields above 100 MV/m while protecting the cavity from dendritic thermomagnetic avalanches caused by local penetration of vortices.

  3. Maximum Entropy Method Approach to $?$ Term

    E-Print Network [OSTI]

    Masahiro Imachi; Yasuhiko Shinno; Hiroshi Yoneyama

    2004-06-09T23:59:59.000Z

    In Monte Carlo simulations of lattice field theory with a $\\theta$ term, one confronts the complex weight problem, or the sign problem. This is circumvented by performing the Fourier transform of the topological charge distribution $P(Q)$. This procedure, however, causes flattening phenomenon of the free energy $f(\\theta)$, which makes study of the phase structure unfeasible. In order to treat this problem, we apply the maximum entropy method (MEM) to a Gaussian form of $P(Q)$, which serves as a good example to test whether the MEM can be applied effectively to the $\\theta$ term. We study the case with flattening as well as that without flattening. In the latter case, the results of the MEM agree with those obtained from the direct application of the Fourier transform. For the former, the MEM gives a smoother $f(\\theta)$ than that of the Fourier transform. Among various default models investigated, the images which yield the least error do not show flattening, although some others cannot be excluded given the uncertainty related to statistical error.

  4. Maximum Throughput Power Control in CDMA Wireless Networks

    E-Print Network [OSTI]

    Mellor-Crummey, John

    Maximum Throughput Power Control in CDMA Wireless Networks Anastasios Giannoulis Department introduce cross­layer, distributed power control algorithms that guarantee maximum possible data throughput performing dynamic routing and scheduling together with power control. The cross­layer interaction consists

  5. Two color laser fields for studying the Cooper minimum with phase-matched high-order harmonic generation

    SciTech Connect (OSTI)

    Ba Dinh, Khuong, E-mail: kdinh@swin.edu.au; Vu Le, Hoang; Hannaford, Peter; Van Dao, Lap [ARC Centre of Excellence for Coherent X-Ray Science and Centre for Quantum and Optical Science, Swinburne University of Technology, Melbourne, Vic 3122 (Australia)

    2014-05-28T23:59:59.000Z

    We experimentally study the observation of the Cooper minimum in a semi-infinite argon-filled gas cell using two-color laser fields at wavelengths of 1400?nm and 800?nm. The experimental results show that the additional 800?nm field can change the macroscopic phase-matching condition through change of the atomic dipole phase associated with the electron in the continuum state and that this approach can be used to control the appearance of the Cooper minimum in the high-order harmonic spectrum in order to study the electronic structure of atoms and molecules.

  6. GMM Estimation of a Maximum Entropy Distribution with Interval Data

    E-Print Network [OSTI]

    Perloff, Jeffrey M.

    GMM Estimation of a Maximum Entropy Distribution with Interval Data Ximing Wu* and Jeffrey M estimate it using a simple yet flexible maximum entropy density. Our Monte Carlo simulations show that the proposed maximum entropy density is able to approximate various distributions extremely well. The two

  7. Minimum Stream Flow and Water Sale Contracts (Indiana)

    Broader source: Energy.gov [DOE]

    The Indiana Natural Resources Commission may provide certain minimum quantities of stream flow or sell water on a unit pricing basis for water supply purposes from the water supply storage in...

  8. Theoretical Minimum Energy Use of a Building HVAC System 

    E-Print Network [OSTI]

    Tanskyi, O.

    2011-01-01T23:59:59.000Z

    This paper investigates the theoretical minimum energy use required by the HVAC system in a particular code compliant office building. This limit might be viewed as the "Carnot Efficiency" for HVAC system. It assumes that all ventilation and air...

  9. TOWARD THE MINIMUM INNER EDGE DISTANCE OF THE HABITABLE ZONE

    E-Print Network [OSTI]

    Zsom, Andras

    We explore the minimum distance from a host star where an exoplanet could potentially be habitable in order not to discard close-in rocky exoplanets for follow-up observations. We find that the inner edge of the Habitable ...

  10. Upper bounds on minimum distance of nonbinary quantum stabilizer codes

    E-Print Network [OSTI]

    Kumar, Santosh

    2005-11-01T23:59:59.000Z

    The most popular class of quantum error correcting codes is stabilizer codes. Binary quantum stabilizer codes have been well studied, and Calderbank, Rains, Shor and Sloane (July 1998) have constructed a table of upper bounds on the minimum distance...

  11. affecting minimum alveolar: Topics by E-print Network

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

    close to the observed minimum mass. The Hubble mass can also be predicted. It is suggested that assumption 1 above could be tested using a cyclotron to accelerate particles...

  12. Minimum Purchase Price Regulations (Prince Edward Island, Canada)

    Broader source: Energy.gov [DOE]

    The Minimum Purchase Price Regulations establish the price which utilities must pay for power produced by large-scale renewable energy generators – that is those capable of producing more than 100...

  13. Compressing Social Networks The Minimum Logarithmic Arrangement Problem

    E-Print Network [OSTI]

    Safro, Ilya

    Compressing Social Networks The Minimum Logarithmic Arrangement Problem Chad Waters School Orderings Heuristic Conclusion Motivation Determine the extent to which social networks can be compressed adjacency queries. Social networks are not random graphs. Exhibit distinctive local properties

  14. Theoretical Minimum Energy Use of a Building HVAC System

    E-Print Network [OSTI]

    Tanskyi, O.

    2011-01-01T23:59:59.000Z

    This paper investigates the theoretical minimum energy use required by the HVAC system in a particular code compliant office building. This limit might be viewed as the "Carnot Efficiency" for HVAC system. It assumes that all ventilation and air...

  15. The minimum information for a qualified BioBrick

    E-Print Network [OSTI]

    Zhou, Mubing

    2012-10-11T23:59:59.000Z

    Since the information of many existing BioBricks is incomplete, thus the usage of the BioBricks will be affected. It is necessary to standardize the minimum information required for a qualified BioBrick. Furthermore this ...

  16. Minimum Cost Layout Decomposition and Legalization for Triple ...

    E-Print Network [OSTI]

    2015-06-27T23:59:59.000Z

    problem as a minimum cost coloring problem, and it is relaxed to a nonlinear 0-1 ... ered as a promising technology for next-generation lithogra- phy. However ...

  17. Minimum patch size thresholds of reproductive success of songbirds

    E-Print Network [OSTI]

    Butcher, Jerrod Anthony

    2009-05-15T23:59:59.000Z

    1 MINIMUM PATCH SIZE THRESHOLDS OF REPRODUCTIVE SUCCESS OF SONGBIRDS A Dissertation by JERROD ANTHONY BUTCHER 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 May 2008 Major Subject: Wildlife and Fisheries Sciences 2 MINIMUM PATCH SIZE THRESHOLDS OF REPRODUCTIVE SUCCESS OF SONGBIRDS A Dissertation by JERROD ANTHONY BUTCHER Submitted to the Office...

  18. GALACTIC COSMIC-RAY ENERGY SPECTRA AND COMPOSITION DURING THE 2009-2010 SOLAR MINIMUM PERIOD

    SciTech Connect (OSTI)

    Lave, K. A.; Binns, W. R.; Israel, M. H. [Department of Physics and the McDonnell Center for the Space Sciences, Washington University, St. Louis, MO 63130 (United States); Wiedenbeck, M. E. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Christian, E. R.; De Nolfo, G. A.; Von Rosenvinge, T. T. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Cummings, A. C.; Davis, A. J.; Leske, R. A.; Mewaldt, R. A.; Stone, E. C. [California Institute of Technology, Pasadena, CA 91125 (United States)

    2013-06-20T23:59:59.000Z

    We report new measurements of the elemental energy spectra and composition of galactic cosmic rays during the 2009-2010 solar minimum period using observations from the Cosmic Ray Isotope Spectrometer (CRIS) onboard the Advanced Composition Explorer. This period of time exhibited record-setting cosmic-ray intensities and very low levels of solar activity. Results are given for particles with nuclear charge 5 {<=} Z {<=} 28 in the energy range {approx}50-550 MeV nucleon{sup -1}. Several recent improvements have been made to the earlier CRIS data analysis, and therefore updates of our previous observations for the 1997-1998 solar minimum and 2001-2003 solar maximum are also given here. For most species, the reported intensities changed by less than {approx}7%, and the relative abundances changed by less than {approx}4%. Compared with the 1997-1998 solar minimum relative abundances, the 2009-2010 abundances differ by less than 2{sigma}, with a trend of fewer secondary species observed in the more recent time period. The new 2009-2010 data are also compared with results of a simple ''leaky-box'' galactic transport model combined with a spherically symmetric solar modulation model. We demonstrate that this model is able to give reasonable fits to the energy spectra and the secondary-to-primary ratios B/C and (Sc+Ti+V)/Fe. These results are also shown to be comparable to a GALPROP numerical model that includes the effects of diffusive reacceleration in the interstellar medium.

  19. Minimum time control of a pair of two-level quantum systems with opposite drifts

    E-Print Network [OSTI]

    Raffaele Romano; Domenico D'Alessandro

    2015-04-27T23:59:59.000Z

    In this paper we solve two equivalent time optimal control problems. On one hand, we design the control field to implement in minimum time the SWAP (or equivalent) operator on a two-level system, assuming that it interacts with an additional, uncontrollable, two-level system. On the other hand, we synthesize the SWAP operator simultaneously, in minimum time, on a pair of two-level systems subject to opposite drifts. We assume that it is possible to perform three independent control actions, and that the total control strength is bounded. These controls either affect the dynamics of the target system, under the first perspective, or, simultaneously, the dynamics of both systems, in the second view. We obtain our results by using techniques of geometric control theory on Lie groups. In particular, we apply the Pontryagin Maximum Principle, and provide a complete characterization of singular and non-singular extremals. Our analysis shows that the problem can be formulated as the motion of a material point in a central force, a well known system in classical mechanics. Although we focus on obtaining the SWAP operator, many of the ideas and techniques developed in this work apply to the time optimal implementation of an arbitrary unitary operator.

  20. Minimum Time Optimal Synthesis for a Control System on SU(2)

    E-Print Network [OSTI]

    Francesca Albertini; Domenico D'Alessandro

    2014-07-28T23:59:59.000Z

    For the time optimal control on an invariant system on SU(2), with two independent controls and a bound on the norm of the control, the extremals of the maximum principle are explicit functions of time and the resulting differential equations can be explicitly integrated. We use this fact here to perform the optimal synthesis for these systems, i.e., find all optimal trajectories. As a consequence, we describe a simple method to find the minimum time control for every desired final condition. Although the Lie group SU(2) is three dimensional, optimal trajectories can be described in the unit disk of the complex plane. We find that a circular trajectory separates optimal trajectories that reach the boundary of the unit disk from the others. Inside this separatrix circle another trajectory (the critical trajectory) plays an important role in that all optimal trajectories end at an intersection with this curve. Our results are of interest to find the minimum time needed to achieve a given evolution of a two level quantum system.

  1. Pecularities of cosmic ray modulation in the solar minimum 23/24

    E-Print Network [OSTI]

    Alania, M V; Wawrzynczak, A

    2015-01-01T23:59:59.000Z

    We study changes of the galactic cosmic ray (GCR) intensity for the ending period of the solar cycle 23 and the beginning of the solar cycle 24 using neutron monitors experimental data. We show that an increase of the GCR intensity in 2009 is generally related with decrease of the solar wind velocity U, the strength B of the interplanetary magnetic field (IMF), and the drift in negative (Aneg) polarity epoch. We present that temporal changes of rigidity dependence of the GCR intensity variation before reaching maximum level in 2009 and after it, do not noticeably differ from each other. The rigidity spectrum of the GCR intensity variations calculated based on neutron monitors data (for rigidities greaten than 10 GV) is hard in the minimum and near minimum epoch. We do not recognize any non-ordinary changes in the physical mechanism of modulation of the GCR intensity in the rigidity range of GCR particles to which neutron monitors respond. We compose 2-D non stationary model of transport equation to describe v...

  2. Rapidly Solving an Online Sequence of Maximum Flow Problems

    E-Print Network [OSTI]

    2008-02-29T23:59:59.000Z

    For example, those in open-pit mining [21] and two-processor ..... A removed arc ei = (u, v) was contained in at least one minimum cut. The flow will decrease by ...

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

    Reports and Publications (EIA)

    2005-01-01T23:59:59.000Z

    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. Feasibility study for lowering the minimum gas pressure in solution-mined caverns based on geomechanical analyses of creep-induced damage and healing

    SciTech Connect (OSTI)

    Ratigan, J.L.; Nieland, J.D.; Devries, K.L.

    1998-12-31T23:59:59.000Z

    Geomechanical analyses were made to determine the minimum gas pressure allowable based on an existing stress-based criterion (Damage Potential) and an advanced constitutive model (MDCF model) capable of quantifying the level of damage and healing in rock salt. The MDCF model is a constitutive model developed for the WIPP to provide a continuum description of the dislocation and damage deformation of salt. The purpose of this study was to determine if the MDCF model is applicable for evaluating the minimum gas pressure of CNG storage caverns. Specifically, it was to be determined if this model would predict that the minimum gas pressure in the caverns could be lowered without compromising the stability of the cavern. Additionally, the healing behavior of the salt was analyzed to determine if complete healing of the damaged rock zone would occur during the period the cavern was at maximum gas pressure. Significant findings of this study are reported.

  5. LANDFILL OPERATION FOR CARBON SEQUESTRATION AND MAXIMUM METHANE EMISSION CONTROL

    SciTech Connect (OSTI)

    Don Augenstein; Ramin Yazdani; Rick Moore; Michelle Byars; Jeff Kieffer; Professor Morton Barlaz; Rinav Mehta

    2000-02-26T23:59:59.000Z

    Controlled landfilling is an approach to manage solid waste landfills, so as to rapidly complete methane generation, while maximizing gas capture and minimizing the usual emissions of methane to the atmosphere. With controlled landfilling, methane generation is accelerated to more rapid and earlier completion to full potential by improving conditions (principally moisture, but also temperature) to optimize biological processes occurring within the landfill. Gas is contained through use of surface membrane cover. Gas is captured via porous layers, under the cover, operated at slight vacuum. A field demonstration project has been ongoing under NETL sponsorship for the past several years near Davis, CA. Results have been extremely encouraging. Two major benefits of the technology are reduction of landfill methane emissions to minuscule levels, and the recovery of greater amounts of landfill methane energy in much shorter times, more predictably, than with conventional landfill practice. With the large amount of US landfill methane generated, and greenhouse potency of methane, better landfill methane control can play a substantial role both in reduction of US greenhouse gas emissions and in US renewable energy. The work described in this report, to demonstrate and advance this technology, has used two demonstration-scale cells of size (8000 metric tons [tonnes]), sufficient to replicate many heat and compaction characteristics of larger ''full-scale'' landfills. An enhanced demonstration cell has received moisture supplementation to field capacity. This is the maximum moisture waste can hold while still limiting liquid drainage rate to minimal and safely manageable levels. The enhanced landfill module was compared to a parallel control landfill module receiving no moisture additions. Gas recovery has continued for a period of over 4 years. It is quite encouraging that the enhanced cell methane recovery has been close to 10-fold that experienced with conventional landfills. This is the highest methane recovery rate per unit waste, and thus progress toward stabilization, documented anywhere for such a large waste mass. This high recovery rate is attributed to moisture, and elevated temperature attained inexpensively during startup. Economic analyses performed under Phase I of this NETL contract indicate ''greenhouse cost effectiveness'' to be excellent. Other benefits include substantial waste volume loss (over 30%) which translates to extended landfill life. Other environmental benefits include rapidly improved quality and stabilization (lowered pollutant levels) in liquid leachate which drains from the waste.

  6. A Near Maximum Likelihood Decoding Algorithm for MIMO Systems ...

    E-Print Network [OSTI]

    Amin Mobasher

    2005-10-03T23:59:59.000Z

    Oct 3, 2005 ... A Near Maximum Likelihood Decoding Algorithm for MIMO Systems Based ... models are also used for soft output decoding in MIMO systems.

  7. Computing the Maximum Volume Inscribed Ellipsoid of a Polytopic ...

    E-Print Network [OSTI]

    Jianzhe Zhen

    2015-01-23T23:59:59.000Z

    Jan 23, 2015 ... Abstract: This paper introduces a method for computing the maximum volume inscribed ellipsoid and k-ball of a projected polytope. It is known ...

  8. Solving Maximum-Entropy Sampling Problems Using Factored Masks

    E-Print Network [OSTI]

    Samuel Burer

    2005-03-02T23:59:59.000Z

    Mar 2, 2005 ... Abstract: We present a practical approach to Anstreicher and Lee's masked spectral bound for maximum-entropy sampling, and we describe ...

  9. A masked spectral bound for maximum-entropy sampling

    E-Print Network [OSTI]

    Kurt Anstreicher

    2003-09-16T23:59:59.000Z

    Sep 16, 2003 ... Abstract: We introduce a new masked spectral bound for the maximum-entropy sampling problem. This bound is a continuous generalization of ...

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

    E-Print Network [OSTI]

    Umberto Lucia

    2010-11-17T23:59:59.000Z

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

  11. annual maximum extent: Topics by E-print Network

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

    of the Sixteenth Annual Conference on Neural Information Processing Systems (NIPS2002) A Maximum Entropy Approach To Computer Technologies and Information Sciences Websites...

  12. analog fixed maximum: Topics by E-print Network

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

    state for given entanglement which can be viewed as an analogue of the Jaynes maximum entropy principle. Pawel Horodecki; Ryszard Horodecki; Michal Horodecki 1998-05-22...

  13. IBM Research Report Solving Maximum-Entropy Sampling ...

    E-Print Network [OSTI]

    2005-02-28T23:59:59.000Z

    Feb 28, 2005 ... Solving Maximum-Entropy Sampling Problems Using. Factored Masks. Samuel Burer. Department of Management Sciences. University of Iowa.

  14. A Requirement for Significant Reduction in the Maximum BTU Input...

    Energy Savers [EERE]

    A Requirement for Significant Reduction in the Maximum BTU Input Rate of Decorative Vented Gas Fireplaces Would Impose Substantial Burdens on Manufacturers A Requirement for...

  15. Minimum Risk Estimation and Decoding in Large Vocabulary Continuous

    E-Print Network [OSTI]

    Byrne, William

    refinements EP(W,A)L(W,(A)) W W ^W = argmin W W W W L(W,W )P(W |A) E(W) = W W L(W,W )P(W |A) #12;Minimum, specifically Word Error Rate ? Efficient Lattice MBR Computation E(W) = W W L(W,W )P(W |A) W W #12;Minimum path to a reference path W ? Word Error Rate Requires String-to-String Alignment W1,...,WN W1,...,WN L(W,W

  16. The minimum distance of classical and quantum turbo-codes

    E-Print Network [OSTI]

    Abbara, Mamdouh

    2011-01-01T23:59:59.000Z

    We present a theory of quantum stabilizer turbo-encoders with unbounded minimum distance. This theory is presented under a framework common to both classical and quantum turbo-encoding theory. The main conditions to have an unbounded minimum distance are that the inner seed encoder has to be recursive, and either systematic or with a totally recursive truncated decoder. This last condition has been introduced in order to obtain a theory viable in the quantum stabilizer case, since it was known that in this case the inner seed encoder could not be recursive and systematic in the same time.

  17. The minimum distance of classical and quantum turbo-codes

    E-Print Network [OSTI]

    Mamdouh Abbara; Jean-Pierre Tillich

    2011-09-01T23:59:59.000Z

    We present a theory of quantum stabilizer turbo-encoders with unbounded minimum distance. This theory is presented under a framework common to both classical and quantum turbo-encoding theory. The main conditions to have an unbounded minimum distance are that the inner seed encoder has to be recursive, and either systematic or with a totally recursive truncated decoder. This last condition has been introduced in order to obtain a theory viable in the quantum stabilizer case, since it was known that in this case the inner seed encoder could not be recursive and systematic in the same time.

  18. Appendix 22 Draft Nutrient Management Plan and Total Maximum Daily

    E-Print Network [OSTI]

    Appendix 22 Draft Nutrient Management Plan and Total Maximum Daily Load for Flathead Lake, Montana. #12;11/01/01 DRAFT i October 30, 2001 Draft Nutrient Management Plan and Total Maximum Daily Load..............................................................................................................................2-11 SECTION 3.0 APPLICABLE WATER QUALITY STANDARDS

  19. FAST SPEAKER ADAPTION VIA MAXIMUM PENALIZED LIKELIHOOD KERNEL REGRESSION

    E-Print Network [OSTI]

    Tsang Wai Hung "Ivor"

    of MLLR using non- linear regression. Specifically, kernel regression is applied with appropriate of Science and Technology Clear Water Bay, Hong Kong ABSTRACT Maximum likelihood linear regression (MLLR) has], and transformation-based methods, most notably, maximum likelihood linear regression (MLLR) adap- tation [3]. However

  20. Digital tomosynthesis mammography using a parallel maximum likelihood reconstruction method

    E-Print Network [OSTI]

    Meleis, Waleed

    Digital tomosynthesis mammography using a parallel maximum likelihood reconstruction method Tao Wu , a Radiology Department, Massachusetts General Hospital, Boston, MA 02114 b Dept. of Electrical and Computer on an iterative maximum likelihood (ML) algorithm, is developed to provide fast reconstruction for digital

  1. BLIND DECONVOLUTION WITH MINIMUM RENYI'S ENTROPY Deniz Erdogmus1

    E-Print Network [OSTI]

    Slatton, Clint

    BLIND DECONVOLUTION WITH MINIMUM RENYI'S ENTROPY Deniz Erdogmus1 , Jose C. Principe1 , Luis Vielva2-mail: [deniz , principe]@cnel.ufl.edu, luis@dicom.unican.es ABSTRACT Blind techniques attract the attention, from communications to control systems. Blind deconvolution is a problem that has been investigated

  2. The Minimum Constraint Removal Problem with Three Robotics Applications

    E-Print Network [OSTI]

    Indiana University

    The Minimum Constraint Removal Problem with Three Robotics Applications Kris Hauser Abstract on three example applications: generating human-interpretable excuses for failure, motion planning under their failures. · In human-robot interaction, semantically meaningful explanations would help people diagnose

  3. The Minimum Constraint Removal Problem with Three Robotics Applications

    E-Print Network [OSTI]

    Indiana University

    The Minimum Constraint Removal Problem with Three Robotics Applications Kris Hauser September 13 strategies. It is demonstrated on three example applications: gener- ating human-interpretable excuses, then they provide no explanation for the failure. For several applications, it would be useful for planners

  4. Network Coding for Joint Storage and Transmission with Minimum Cost

    E-Print Network [OSTI]

    Jiang, Anxiao "Andrew"

    transmission and data storage in networks. Its power comes from the improved flexibility that codeword symbolsNetwork Coding for Joint Storage and Transmission with Minimum Cost Anxiao (Andrew) Jiang@cs.tamu.edu. Abstract-- Network coding provides elegant solutions to many data transmission problems. The usage

  5. arXiv:condmat/0310072 Minimum dissipation principle

    E-Print Network [OSTI]

    Gabrielli, Davide

    uctuation principle which generalizes the well known Boltzmann{Einstein formula for the probability have opposite transformation properties under time reversal, the non dissipative part being in this respect akin to a magnetic term. We emphasize that the minimum dissipation principle is of general

  6. Storage Begins with Purchasing purchase minimum needed for experiment

    E-Print Network [OSTI]

    Cohen, Robert E.

    Storage Begins with Purchasing · purchase minimum needed for experiment ­ do not "buy in bulk://www.ehs.washington.edu/forms/epo/peroxideguidelines.pdf #12;Chemical Storage Basics · https://web.mit.edu/environment/pdf/sop/sop_0023.pdf · http://www.lbl.gov/ehs/chsp/html/storage level · do not store chemicals in fume hoods · flammable storage refrigerator needed for flammable

  7. Interior Architecture Minor Tracking Sheet Total Minimum Credits: 26

    E-Print Network [OSTI]

    Interior Architecture Minor Tracking Sheet Total Minimum Credits: 26 Minor standing is prerequisite architecture studio course is required for architecture majors enrolled in the interior architecture minor (1 is required for Architecture majors): IARC 484 Interior Design Studio (6), IARC 486 Furniture

  8. Architecture Minor Tracking Sheet Total Minimum Credits: 26

    E-Print Network [OSTI]

    Architecture Minor Tracking Sheet Total Minimum Credits: 26 Minor standing is prerequisite Notes: Required courses in one's major will not count for the minor with one exception: 1 architecture studio course is required for interior architecture majors enrolled in the architecture minor, and this studio

  9. The Clique Partition Problem with Minimum Clique Size ...

    E-Print Network [OSTI]

    2005-05-05T23:59:59.000Z

    May 5, 2005 ... Page 1 ... We will explain later in section 2.1, what we mean by “x is the .... since we don't know a concrete description for R(G, S), we will start from. ¯ ..... Now consider CPPMIN: S is the minimum size for each cluster, so the ...

  10. Predicting Daily Net Radiation Using Minimum Climatological Data1

    E-Print Network [OSTI]

    Predicting Daily Net Radiation Using Minimum Climatological Data1 S. Irmak, M.ASCE2 ; A. Irmak3 ; J Abstract: Net radiation (Rn) is a key variable for computing reference evapotranspiration and is a driving for predicting daily Rn have been widely used. However, when the paucity of detailed climatological data

  11. A minimum problem with free boundary for a degenerate quasilinear ...

    E-Print Network [OSTI]

    2005-03-04T23:59:59.000Z

    Feb 8, 2005 ... By the strong minimum principle, w0 = 0 in B5/8, since w0 ? 0 and w0(0) ..... 4.7 in [2] and pp. 19–20 in [3]; see also our proof of Theorem 5.1.

  12. A stochastic minimum principle and an adaptive pathwise algorithm for

    E-Print Network [OSTI]

    Electric power systems a b s t r a c t We present a numerical method for finite-horizon stochastic optimal control models. We derive a stochastic minimum principle (SMP) and then develop a numerical method based-parametric interpolation methods. We present results from a standard linear quadratic control model, and a realistic case

  13. The"minimum information about an environmental sequence" (MIENS) specification

    SciTech Connect (OSTI)

    Yilmaz, P.; Kottmann, R.; Field, D.; Knight, R.; Cole, J.R.; Amaral-Zettler, L.; Gilbert, J.A.; Karsch-Mizrachi, I.; Johnston, A.; Cochrane, G.; Vaughan, R.; Hunter, C.; Park, J.; Morrison, N.; Rocca-Serra, P.; Sterk, P.; Arumugam, M.; Baumgartner, L.; Birren, B.W.; Blaser, M.J.; Bonazzi, V.; Bork, P.; Buttigieg, P. L.; Chain, P.; Costello, E.K.; Huot-Creasy, H.; Dawyndt, P.; DeSantis, T.; Fierer, N.; Fuhrman, J.; Gallery, R.E.; Gibbs, R.A.; Giglio, M.G.; Gil, I. San; Gonzalez, A.; Gordon, J.I.; Guralnick, R.; Hankeln, W.; Highlander, S.; Hugenholtz, P.; Jansson, J.; Kennedy, J.; Knights, D.; Koren, O.; Kuczynski, J.; Kyrpides, N.; Larsen, R.; Lauber, C.L.; Legg, T.; Ley, R.E.; Lozupone, C.A.; Ludwig, W.; Lyons, D.; Maguire, E.; Methe, B.A.; Meyer, F.; Nakieny, S.; Nelson, K.E.; Nemergut, D.; Neufeld, J.D.; Pace, N.R.; Palanisamy, G.; Peplies, J.; Peterson, J.; Petrosino, J.; Proctor, L.; Raes, J.; Ratnasingham, S.; Ravel, J.; Relman, D.A.; Assunta-Sansone, S.; Schriml, L.; Sodergren, E.; Spor, A.; Stombaugh, J.; Tiedje, J.M.; Ward, D.V.; Weinstock, G.M.; Wendel, D.; White, O.; Wikle, A.; Wortman, J.R.; Glockner, F.O.; Bushman, F.D.; Charlson, E.; Gevers, D.; Kelley, S.T.; Neubold, L.K.; Oliver, A.E.; Pruesse, E.; Quast, C.; Schloss, P.D.; Sinha, R.; Whitely, A.

    2010-10-15T23:59:59.000Z

    We present the Genomic Standards Consortium's (GSC) 'Minimum Information about an ENvironmental Sequence' (MIENS) standard for describing marker genes. Adoption of MIENS will enhance our ability to analyze natural genetic diversity across the Tree of Life as it is currently being documented by massive DNA sequencing efforts from myriad ecosystems in our ever-changing biosphere.

  14. Effect of mechanical parameters on dielectric elastomer minimum energy structures

    E-Print Network [OSTI]

    Floreano, Dario

    Effect of mechanical parameters on dielectric elastomer minimum energy structures Jun Shintake energy structures Jun Shintake*a,b , Samuel Rosseta , Dario Floreanob , Herbert R. Sheaa a Microsystems for Space Technologies Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), Neuchâtel, Switzerland b

  15. Optimal Allocation of Bandwidth for Minimum Battery Consumption

    E-Print Network [OSTI]

    Cosman, Pamela C.

    properties of the battery under bursty discharge conditions are exploited. In this paper, we exploitOptimal Allocation of Bandwidth for Minimum Battery Consumption Qinghua Zhao, Pamela C. Cosman, a power amplifier utilizes battery energy more efficiently with a higher transmission power. For a given

  16. Information Delivery in Large Wireless Networks with Minimum Energy Expense

    E-Print Network [OSTI]

    Wang, Wenye

    transmission paths [8], [9]. By spending the energy resources in a wireless network wisely, the existingInformation Delivery in Large Wireless Networks with Minimum Energy Expense Yi Xu and Wenye Wang in large-scale multihop wireless networks because of the limited energy supplies from batteries. We

  17. Jamming-Aware Minimum Energy Routing in Wireless Networks

    E-Print Network [OSTI]

    Goeckel, Dennis L.

    1 Jamming-Aware Minimum Energy Routing in Wireless Networks Azadeh Sheikholeslami, Majid Ghaderi; however, energy-aware routing in the presence of active adversary (jammers) has not been considered. We. There has been some study of energy-aware ad hoc routing protocols in the literature [13], [14], [15], [16

  18. An Efficient Algorithm for Computing Robust Minimum Capacity st Cuts

    E-Print Network [OSTI]

    2008-04-03T23:59:59.000Z

    Apr 3, 2008 ... under data uncertainty such as in open-pit mining or scheduling jobs on ..... maximum flow problem in that arcs e1,e2, ··· ,ei had their capacities ...

  19. Multiple Test Procedures for Identifying the Minimum Effective and Maximum Safe Doses of Author(s): Ajit C. Tamhane and Brent R. Logan

    E-Print Network [OSTI]

    Bustamante, Fabián E.

    Author(s): Ajit C. Tamhane and Brent R. Logan Source: Journal of the American Statistical Association, Vol. 97, No. 457 (Mar., 2002), pp. 293- 301 Published by: American Statistical Association Stable URL of scholarship. For more information about JSTOR, please contact support@jstor.org. American Statistical

  20. FOUNDATIONS IN ABSTRACT MATHEMATICS MARCH 19, 2012 1. Find a maximum matching and a minimum cover in the following bipartite graph: (A)

    E-Print Network [OSTI]

    Wagner, Stephan

    , and each man ranks all women from best to worst. Now each woman should marry one of the men (and vice versa such that increasing subsequences are chains and decreasing subsequences are antichains (or vice versa).] 5. A graph town, there is an equal number of men and women. Each woman ranks all (C) men from best to worst

  1. Method to improve reliability of a fuel cell system using low performance cell detection at low power operation

    DOE Patents [OSTI]

    Choi, Tayoung; Ganapathy, Sriram; Jung, Jaehak; Savage, David R.; Lakshmanan, Balasubramanian; Vecasey, Pamela M.

    2013-04-16T23:59:59.000Z

    A system and method for detecting a low performing cell in a fuel cell stack using measured cell voltages. The method includes determining that the fuel cell stack is running, the stack coolant temperature is above a certain temperature and the stack current density is within a relatively low power range. The method further includes calculating the average cell voltage, and determining whether the difference between the average cell voltage and the minimum cell voltage is greater than a predetermined threshold. If the difference between the average cell voltage and the minimum cell voltage is greater than the predetermined threshold and the minimum cell voltage is less than another predetermined threshold, then the method increments a low performing cell timer. A ratio of the low performing cell timer and a system run timer is calculated to identify a low performing cell.

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

    E-Print Network [OSTI]

    Liu, Jian

    2008-01-01T23:59:59.000Z

    1992). J. Skilling, in Maximum entropy and Bayesian methods,1989). S. F. Gull, in Maximum entropy and Bayesian methods,with the classical maximum entropy (CME) technique (MEAC-

  3. Improved constraints on transit time distributions from argon 39: A maximum entropy approach

    E-Print Network [OSTI]

    Holzer, Mark; Primeau, Francois W

    2010-01-01T23:59:59.000Z

    Gull (1991), Bayesian maximum entropy image reconstruction,Atlantic venti- lated? Maximum entropy inversions of bottlefrom argon 39: A maximum entropy approach Mark Holzer 1,2

  4. Quantum Statistics Basis, Thermodynamic Analogies and the Degree of Confidence for Maximum Entropy Restoration and Estimation

    E-Print Network [OSTI]

    Soffer, Bernard H; Kikuchi, Ryoichi

    1994-01-01T23:59:59.000Z

    of Confidence for Maximum Entropy Restoration and EstimationApril 3, 1992) The Maximum Entropy method, using physicalare discussed. Maximum Entropy (ME) estimation has been

  5. Performance of solid oxide fuel cells approaching the two-dimensional limit

    SciTech Connect (OSTI)

    Kerman, K., E-mail: kkerman@fas.harvard.edu; Ramanathan, S. [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)

    2014-05-07T23:59:59.000Z

    We model electrochemical kinetics and physical conduction mechanisms for carrier transport in electrolyte membranes to determine the limits of dimensionality reduction (down to 1?nm) on maximum power output of solid oxide fuel cells with symmetric Pt electrodes. Using Y-doped ZrO{sub 2}, we find a minimum thickness of ?6?nm to realize near ideal chemical potential in such fuel cells, which is limited by electronic breakdown when approaching the dielectric breakdown strength. For larger electrolyte thicknesses, the greatest source of electronic leakage influencing power loss is from Ohmic transport of minority carriers and emission of trapped carriers. For porous metallic electrodes, an ideal microstructure with the particle size comparable to particle spacing dimensions is found to accurately model experimental results. The role of electronic trap states in the electrolyte band gap on power density characteristics is highlighted.

  6. Optimization of Operating Parameters for Minimum Mechanical Specific Energy in Drilling

    SciTech Connect (OSTI)

    Hamrick, Todd

    2011-05-25T23:59:59.000Z

    Efficiency in drilling is measured by Mechanical Specific Energy (MSE). MSE is the measure of the amount of energy input required to remove a unit volume of rock, expressed in units of energy input divided by volume removed. It can be expressed mathematically in terms of controllable parameters; Weight on Bit, Torque, Rate of Penetration, and RPM. It is well documented that minimizing MSE by optimizing controllable factors results in maximum Rate of Penetration. Current methods for computing MSE make it possible to minimize MSE in the field only through a trial-and-error process. This work makes it possible to compute the optimum drilling parameters that result in minimum MSE. The parameters that have been traditionally used to compute MSE are interdependent. Mathematical relationships between the parameters were established, and the conventional MSE equation was rewritten in terms of a single parameter, Weight on Bit, establishing a form that can be minimized mathematically. Once the optimum Weight on Bit was determined, the interdependent relationship that Weight on Bit has with Torque and Penetration per Revolution was used to determine optimum values for those parameters for a given drilling situation. The improved method was validated through laboratory experimentation and analysis of published data. Two rock types were subjected to four treatments each, and drilled in a controlled laboratory environment. The method was applied in each case, and the optimum parameters for minimum MSE were computed. The method demonstrated an accurate means to determine optimum drilling parameters of Weight on Bit, Torque, and Penetration per Revolution. A unique application of micro-cracking is also presented, which demonstrates that rock failure ahead of the bit is related to axial force more than to rotation speed.

  7. Observation of the Density Minimum in Deeply Supercooled Confined Water

    E-Print Network [OSTI]

    Dazhi Liu; Yang Zhang; Chia-Cheng Chen; Chung-Yuan Mou; Peter H Poole; Sow-Hsin Chen

    2007-04-17T23:59:59.000Z

    Small angle neutron scattering (SANS) is used to measure the density of heavy water contained in 1-D cylindrical pores of mesoporous silica material MCM-41-S-15, with pores of diameter of 15+-1 A. In these pores the homogenous nucleation process of bulk water at 235 K does not occur and the liquid can be supercooled down to at least 160 K. The analysis of SANS data allows us to determine the absolute value of the density of D2O as a function of temperature. We observe a density minimum at 210+-5 K with a value of 1.041+-0.003 g/cm3. We show that the results are consistent with the predictions of molecular dynamics simulations of supercooled bulk water. This is the first experimental report of the existence of the density minimum in supercooled water.

  8. Multichannel Blind Identification: From Subspace to Maximum Likelihood Methods

    E-Print Network [OSTI]

    Tong, Lang

    Multichannel Blind Identification: From Subspace to Maximum Likelihood Methods LANG TONG, MEMBER, IEEE, AND SYLVIE PERREAU Invited Paper A review of recent blind channel estimation algorithms is pre-- Blind equalization, parameter estimation, system identification. I. INTRODUCTION A. What Is Blind

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

    E-Print Network [OSTI]

    Bruzek, Alison K. (Allison Kim)

    2013-01-01T23:59:59.000Z

    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 ...

  10. On the maximum pressure rise rate in boosted HCCI operation

    E-Print Network [OSTI]

    Wildman, Craig B.

    This paper explores the combined effects of boosting, intake air temperature, trapped residual gas fraction, and dilution on the Maximum Pressure Rise Rate (MPRR) in a boosted single cylinder gasoline HCCI engine with ...

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

    SciTech Connect (OSTI)

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

    2012-07-01T23:59:59.000Z

    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.

  12. Bacteria Total Maximum Daily Load Task Force Final Report 

    E-Print Network [OSTI]

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

    2009-01-01T23:59:59.000Z

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

  13. Maximum Likelihood Decoding of Reed Solomon Codes Madhu Sudan

    E-Print Network [OSTI]

    Sudan, Madhu

    Maximum Likelihood Decoding of Reed Solomon Codes Madhu Sudan Abstract We present a randomized and Welch [4] (see, for instance, Gem- mell and Sudan [9]). In this paper we present an algorithm which

  14. Multi-Class Classification with Maximum Margin Multiple Kernel

    E-Print Network [OSTI]

    Tomkins, Andrew

    (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

  15. Maximum entropy method and oscillations in the diffraction cone

    E-Print Network [OSTI]

    O. Dumbrajs; J. Kontros; A. Lengyel

    2000-07-15T23:59:59.000Z

    The maximum entropy method has been applied to investigate the oscillating structure in the pbarp- and pp-elastic scattering differential cross-section at high energy and small momentum transfer. Oscillations satisfying quite realistic reliability criteria have been found.

  16. Dangerous implications of a minimum length in quantum gravity

    E-Print Network [OSTI]

    Cosimo Bambi; Katherine Freese

    2008-07-17T23:59:59.000Z

    The existence of a minimum length and a generalization of the Heisenberg uncertainty principle seem to be two fundamental ingredients required in any consistent theory of quantum gravity. In this letter we show that they would predict dangerous processes which are phenomenologically unacceptable. For example, long--lived virtual super--Planck mass black holes may lead to rapid proton decay. Possible solutions of this puzzle are briefly discussed.

  17. Investigation of a minimum energy Earth-Mars trajectory

    E-Print Network [OSTI]

    Brown, Richard Emett

    1967-01-01T23:59:59.000Z

    INVESTIGATION OF A MINIMUM ENERGY EARTH-MARS TRAJECTORY A Thesis by Richard Emmett grown Submitted to the Graduate Co11ege of the Texas ASM University in partia1 fulfi11ment of the requirements for the degree of MASTER OF SCIENCE May 1967... Major Subject: Aerospace Engineering INVESTIGATION OF A MINIMIIM ENERGy EARTH MARS TRAJECTORy A Thesis by Richard Emmett Brown Approved as to style and content by; (Co-chairman of Committee) (Head of Department) (Member) May I967 TABLE...

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

    E-Print Network [OSTI]

    Henryk Gzyl; Enrique ter Horst

    2007-09-04T23:59:59.000Z

    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.

  19. The maximum entropy tecniques and the statistical description of systems

    E-Print Network [OSTI]

    B. Z. Belashev; M. K. Suleymanov

    2001-10-19T23:59:59.000Z

    The maximum entropy technique (MENT) is used to determine the distribution functions of physical values. MENT naturally combines required maximum entropy, the properties of a system and connection conditions in the form of restrictions imposed on the system. It can, therefore, be employed to statistically describe closed and open systems. Examples in which MENT is used to describe equilibrium and non-equilibrium states, as well as steady states that are far from being in thermodynamic equilibrium, are discussed.

  20. SOLAR ROTATION RATE DURING THE CYCLE 24 MINIMUM IN ACTIVITY

    SciTech Connect (OSTI)

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

    2010-09-01T23:59:59.000Z

    The minimum of solar cycle 24 is significantly different from most other minima in terms of its duration as well as its abnormally low levels of activity. Using available helioseismic data that cover epochs from the minimum of cycle 23 to now, we study the differences in the nature of the solar rotation between the minima of cycles 23 and 24. We find that there are significant differences between the rotation rates during the two minima. There are differences in the zonal-flow pattern too. We find that the band of fast rotating region close to the equator bifurcated around 2005 and recombined by 2008. This behavior is different from that during the cycle 23 minimum. By autocorrelating the zonal-flow pattern with a time shift, we find that in terms of solar dynamics, solar cycle 23 lasted for a period of 11.7 years, consistent with the result of Howe et al. (2009). The autocorrelation coefficient also confirms that the zonal-flow pattern penetrates through the convection zone.

  1. Maximum-Entropy Meshfree Method for Compressible and Near-Incompressible Elasticity

    SciTech Connect (OSTI)

    Ortiz, A; Puso, M A; Sukumar, N

    2009-09-04T23:59:59.000Z

    Numerical integration errors and volumetric locking in the near-incompressible limit are two outstanding issues in Galerkin-based meshfree computations. In this paper, we present a modified Gaussian integration scheme on background cells for meshfree methods that alleviates errors in numerical integration and ensures patch test satisfaction to machine precision. Secondly, a locking-free small-strain elasticity formulation for meshfree methods is proposed, which draws on developments in assumed strain methods and nodal integration techniques. In this study, maximum-entropy basis functions are used; however, the generality of our approach permits the use of any meshfree approximation. Various benchmark problems in two-dimensional compressible and near-incompressible small strain elasticity are presented to demonstrate the accuracy and optimal convergence in the energy norm of the maximum-entropy meshfree formulation.

  2. Fabrication and Characterization of Organic Solar Cells

    E-Print Network [OSTI]

    Yengel, Emre

    2010-01-01T23:59:59.000Z

    York: Wiley; 1998. Short circuit current of a solar cell [circuit voltage, short circuit current and maximum powerinterface. (ii) Short circuit current (I sc ); In the ideal

  3. Observation of the density minimum in deeply supercooled confined water

    E-Print Network [OSTI]

    Chen, Sow-Hsin

    of SANS data allows us to determine the absolute value of the density of D2O as a function of temperature remarkable physical properties of liquid water (1), the density maximum is probably the most well known is considered to be the most accurate model for reproducing experimental data when used with a simple spherical

  4. Fundamental properties of solar-like oscillating stars from frequencies of minimum $\\Delta \

    E-Print Network [OSTI]

    Y?ld?z, M; Kayhan, C

    2015-01-01T23:59:59.000Z

    The large separations between the oscillation frequencies of solar-like stars are measures of stellar mean density. The separations have been thought to be mostly constant in the observed range of frequencies. However, detailed investigation shows that they are not constant, and their variations are not random but have very strong diagnostic potential for our understanding of stellar structure and evolution. In this regard, frequencies of the minimum large separation are very useful tools. From these frequencies, in addition to the large separation and frequency of maximum amplitude, Y\\i ld\\i z et al. recently have developed new methods to find almost all the fundamental stellar properties. In the present study, we aim to find metallicity and helium abundances from the frequencies, and generalize the relations given by Y\\i ld\\i z et al. for a wider stellar mass range and arbitrary metallicity ($Z$) and helium abundance ($Y$). We show that the effect of metallicity is { significant} for most of the fundamental...

  5. Fermion Masses and Mixings from a Minimum Principle

    E-Print Network [OSTI]

    Rodrigo Alonso

    2014-05-22T23:59:59.000Z

    We analyze the structure of quark and lepton mass matrices under the hypothesis that they are determined from a minimum principle applied to a generic potential invariant under the $\\left[U(3)\\right]^5\\otimes {\\mathcal O}(3)$ flavor symmetry, acting on Standard Model fermions and right-handed neutrinos. Unlike the quark case, we show that hierarchical masses for charged leptons are naturally accompanied by degenerate Majorana neutrinos with one mixing angle close to maximal, a second potentially large, a third one necessarily small, and one maximal relative Majorana phase. The scheme presented here could be tested in the near future via neutrino-less double beta decay and cosmological measurements.

  6. Minimum pressure envelope cavitation analysis using two-dimensional panel method

    E-Print Network [OSTI]

    Peterson, Christopher J., S.M. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    An analysis tool for calculating minimum pressure envelopes was developed using XFOIL. This thesis presents MATLAB® executables that interface with a modified version of XFOIL for determining the minimum pressure of a foil ...

  7. The impact of minimum age of employment regulation on child labor and schooling

    E-Print Network [OSTI]

    Edmonds, Eric V

    Promoting minimum age of employment regulation has been a centerpiece in child labor policy for the last 15 years. If enforced, minimum age regulation would change the age profile of paid child employment. Using micro-data ...

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

    E-Print Network [OSTI]

    B. Fuchs

    1998-12-02T23:59:59.000Z

    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.

  9. When are microcircuits well-modeled by maximum entropy methods?

    E-Print Network [OSTI]

    2010-07-20T23:59:59.000Z

    POSTER PRESENTATION Open Access When are microcircuits well-modeled by maximum entropy methods? Andrea K Barreiro1*, Eric T Shea-Brown1, Fred M Rieke2,3, Julijana Gjorgjieva4 From Nineteenth Annual Computational Neuroscience Meeting: CNS*2010 San... Antonio, TX, USA. 24-30 July 2010 Recent experiments in retina and cortex have demon- strated that pairwise maximum entropy (PME) methods can approximate observed spiking patterns to a high degree of accuracy [1,2]. In this paper we examine...

  10. Valence quark distributions of the proton from maximum entropy approach

    E-Print Network [OSTI]

    Rong Wang; Xurong Chen

    2014-10-14T23:59:59.000Z

    We present an attempt of maximum entropy principle to determine valence quark distributions in the proton at very low resolution scale $Q_0^2$. The initial three valence quark distributions are obtained with limited dynamical information from quark model and QCD theory. Valence quark distributions from this method are compared to the lepton deep inelastic scattering data, and the widely used CT10 and MSTW08 data sets. The obtained valence quark distributions are consistent with experimental observations and the latest global fits of PDFs. Maximum entropy method is expected to be particularly useful in the case where relatively little information from QCD calculation is given.

  11. Valence quark distributions of the proton from maximum entropy approach

    E-Print Network [OSTI]

    Wang, Rong

    2014-01-01T23:59:59.000Z

    We present an attempt of maximum entropy principle to determine valence quark distributions in the proton at very low resolution scale $Q_0^2$. The initial three valence quark distributions are obtained with limited dynamical information from quark model and QCD theory. Valence quark distributions from this method are compared to the lepton deep inelastic scattering data, and the widely used CT10 and MSTW08 data sets. The obtained valence quark distributions are consistent with experimental observations and the latest global fits of PDFs. Maximum entropy method is expected to be particularly useful in the case where relatively little information from QCD calculation is given.

  12. Assessing complexity by means of maximum entropy models

    E-Print Network [OSTI]

    Chliamovitch, Gregor; Velasquez, Lino

    2014-01-01T23:59:59.000Z

    We discuss a characterization of complexity based on successive approximations of the probability density describing a system by means of maximum entropy methods, thereby quantifying the respective role played by different orders of interaction. This characterization is applied on simple cellular automata in order to put it in perspective with the usual notion of complexity for such systems based on Wolfram classes. The overlap is shown to be good, but not perfect. This suggests that complexity in the sense of Wolfram emerges as an intermediate regime of maximum entropy-based complexity, but also gives insights regarding the role of initial conditions in complexity-related issues.

  13. Minimum Energy Per Bit for Secret Key Acquisition Over Multipath Wireless Channels

    E-Print Network [OSTI]

    Sayeed, Akbar M.

    Minimum Energy Per Bit for Secret Key Acquisition Over Multipath Wireless Channels Tzu-Han Chou the secret key capacity. We analyze the low-SNR regime to quantify the minimum energy per secret key bit of conventional channel capacity, there is a non-zero SNR that achieves the minimum energy per key bit. A time

  14. Analysis of Minimum Cost in Shape-Optimized Litz-Wire Inductor Windings

    E-Print Network [OSTI]

    Analysis of Minimum Cost in Shape-Optimized Litz-Wire Inductor Windings C. R. Sullivan J. D. Mc the IEEE. #12;Analysis of Minimum Cost in Shape-Optimized Litz-Wire Inductor Windings Charles R. Sullivan://engineering.dartmouth.edu/inductor Abstract--Litz-wire windings for gapped inductors are optimized for minimum cost within a loss constraint

  15. An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network

    E-Print Network [OSTI]

    Brown, Timothy X.

    An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network Sheetalkumar Doshi the necessary features of an on-demand minimum energy routing protocol and suggests mechanisms the performance of an on-demand minimum energy routing protocol in terms of energy savings with an existing on

  16. An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network

    E-Print Network [OSTI]

    An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network Sheetalkumar Doshi of an on-demand minimum energy routing protocol and suggests mechanisms for their imple- mentation. We of an on-demand minimum energy routing protocol in terms of energy savings with an existing on-demand ad

  17. Does the current minimum validate (or invalidate) cycle prediction methods?

    E-Print Network [OSTI]

    Hathaway, David H

    2010-01-01T23:59:59.000Z

    This deep, extended solar minimum and the slow start to Cycle 24 strongly suggest that Cycle 24 will be a small cycle. A wide array of solar cycle prediction techniques have been applied to predicting the amplitude of Cycle 24 with widely different results. Current conditions and new observations indicate that some highly regarded techniques now appear to have doubtful utility. Geomagnetic precursors have been reliable in the past and can be tested with 12 cycles of data. Of the three primary geomagnetic precursors only one (the minimum level of geomagnetic activity) suggests a small cycle. The Sun's polar field strength has also been used to successfully predict the last three cycles. The current weak polar fields are indicative of a small cycle. For the first time, dynamo models have been used to predict the size of a solar cycle but with opposite predictions depending on the model and the data assimilation. However, new measurements of the surface meridional flow indicate that the flow was substantially fa...

  18. Theoretical Minimum Energies to Produce Steel for Selected Conditions

    SciTech Connect (OSTI)

    Fruehan, R.J.; Fortini, O.; Paxton, H.W.; Brindle, R.

    2000-05-01T23:59:59.000Z

    The energy used to produce liquid steel in today's integrated and electric arc furnace (EAF) facilities is significantly higher than the theoretical minimum energy requirements. This study presents the absolute minimum energy required to produce steel from ore and mixtures of scrap and scrap alternatives. Additional cases in which the assumptions are changed to more closely approximate actual operating conditions are also analyzed. The results, summarized in Table E-1, should give insight into the theoretical and practical potentials for reducing steelmaking energy requirements. The energy values have also been converted to carbon dioxide (CO{sub 2}) emissions in order to indicate the potential for reduction in emissions of this greenhouse gas (Table E-2). The study showed that increasing scrap melting has the largest impact on energy consumption. However, scrap should be viewed as having ''invested'' energy since at one time it was produced by reducing ore. Increasing scrap melting in the BOF mayor may not decrease energy if the ''invested'' energy in scrap is considered.

  19. Maximum stellar mass versus cluster membership number revisited

    E-Print Network [OSTI]

    Th. Maschberger; C. J. Clarke

    2008-09-05T23:59:59.000Z

    We have made a new compilation of observations of maximum stellar mass versus cluster membership number from the literature, which we analyse for consistency with the predictions of a simple random drawing hypothesis for stellar mass selection in clusters. Previously, Weidner and Kroupa have suggested that the maximum stellar mass is lower, in low mass clusters, than would be expected on the basis of random drawing, and have pointed out that this could have important implications for steepening the integrated initial mass function of the Galaxy (the IGIMF) at high masses. Our compilation demonstrates how the observed distribution in the plane of maximum stellar mass versus membership number is affected by the method of target selection; in particular, rather low n clusters with large maximum stellar masses are abundant in observational datasets that specifically seek clusters in the environs of high mass stars. Although we do not consider our compilation to be either complete or unbiased, we discuss the method by which such data should be statistically analysed. Our very provisional conclusion is that the data is not indicating any striking deviation from the expectations of random drawing.

  20. 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

  1. STATE OF CALIFORNIA MAXIMUM RATED TOTAL COOLING CAPACITY

    E-Print Network [OSTI]

    /09) CALIFORNIA ENERGY COMMISSION INSTALLATION CERTIFICATE CF-6R-MECH-27-HERS Maximum Rated Total Cooling Capacity of the installed system (Btu/hr) 3b Sum of the ARI Rated Total Cooling Capacities of multiple systems installed Cooling Capacities of the installed cooling systems must be calculated and entered in row 3b. 4a MRTCC

  2. Maximum power tracking control scheme for wind generator systems

    E-Print Network [OSTI]

    Mena Lopez, Hugo Eduardo

    2008-10-10T23:59:59.000Z

    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...

  3. Maximum power tracking control scheme for wind generator systems

    E-Print Network [OSTI]

    Mena, Hugo Eduardo

    2009-05-15T23:59:59.000Z

    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...

  4. annual maximum water: Topics by E-print Network

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

    annual maximum water First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 ORIGINAL PAPER The distribution of...

  5. BRANCH-CUT-AND-PROPAGATE FOR THE MAXIMUM k ...

    E-Print Network [OSTI]

    2011-03-16T23:59:59.000Z

    maximum k-colorable subgraph problem consists of selecting a k-color- able induced subgraph of ..... a symmetric subgroup Sp of Aut(G) acts on Vp for all p ? [s]. Let Vp = {vp. 1,...,vp qp. } ...... [9] J. Crawford, M. Ginsberg, E. Luks, and A. Roy.

  6. 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

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

    E-Print Network [OSTI]

    Meyers, Steven D.

    Andrew-Category 4· Category 4 Hurricane - Winds 131-155 mph. Wall failures in homes and complete roofHurricane 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

  8. Individual Module Maximum Power Point Tracking for Thermoelectric Generator Systems

    E-Print Network [OSTI]

    Schaltz, Erik

    of Thermo Electric Generator (TEG) systems a power converter is often inserted between the TEG system that the TEG system produces the maximum power. However, if the conditions, e.g. temperature, health, age, etc find the best compromise of all modules. In order to increase the power production of the TEG system

  9. Efficiency Improvement of an IPMSM using Maximum Efficiency Operating Strategy

    E-Print Network [OSTI]

    Paderborn, Universität

    Efficiency Improvement of an IPMSM using Maximum Efficiency Operating Strategy Daniel Pohlenz. These are characterized by high efficiency and high torque as well as power density. The generation of reference currents that the MTPC method deviates considerably from the best efficiency under certain boundary conditions. The use

  10. Maximum power tracking control scheme for wind generator systems 

    E-Print Network [OSTI]

    Mena, Hugo Eduardo

    2009-05-15T23:59:59.000Z

    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...

  11. Maximum power tracking control scheme for wind generator systems 

    E-Print Network [OSTI]

    Mena Lopez, Hugo Eduardo

    2008-10-10T23:59:59.000Z

    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...

  12. MARTIN'S MAXIMUM AND TOWER FORCING SEAN COX AND MATTEO VIALE

    E-Print Network [OSTI]

    Viale, Matteo

    MARTIN'S MAXIMUM AND TOWER FORCING SEAN COX AND MATTEO VIALE Abstract. There are several examples, the Reflection Princi- ple (RP) implies that if I is a tower of ideals which concentrates on the class GIC1 of 1 [16], shows that if PFA+ or MM holds and there is an inaccessible cardinal, then there is a tower

  13. Retrocommissioning Case Study - Applying Building Selection Criteria for Maximum Results

    E-Print Network [OSTI]

    Luskay, L.; Haasl, T.; Irvine, L.; Frey, D.

    2002-01-01T23:59:59.000Z

    RETROCOMMISSIONING CASE STUDY ?Applying Building Selection Criteria for Maximum Results? Larry Luskay, Tudi Haasl, Linda Irvine Portland Energy Conservation, Inc. Portland, Oregon Donald Frey Architectural Energy Corporation Boulder.... The building was retrocommissioned by Portland Energy Conservation, Inc. (PECI), in conjunction with Architectural Energy Corporation (AEC). The building-specific goals were: 1) Obtain cost-effective energy savings from optimizing operation...

  14. Reflections on a record minimum The numbers are in 2012 broke the record for minimum sea ice extent and is still heading down (see

    E-Print Network [OSTI]

    in climate models. The approach was to freeze an icebreaker into the pack ice and drift for a year makingReflections on a record minimum The numbers are in ­ 2012 broke the record for minimum sea ice extent and is still heading down (see Figure 1). The sea ice extent data tell an unequivocal story of ice

  15. Neutrino Mixing and Masses from a Minimum Principle

    E-Print Network [OSTI]

    Alonso, R; Isidori, G; Maiani, L

    2013-01-01T23:59:59.000Z

    We analyze the structure of quark and lepton mass matrices under the hypothesis that they are determined from a minimum principle applied to a generic potential invariant under the $[SU(3)]^5\\otimes {\\mathcal O}(3)$ flavor symmetry, acting on Standard Model fermions and right-handed neutrinos. Unlike the quark case, we show that hierarchical masses for charged leptons are naturally accompanied by degenerate Majorana neutrinos with one angle close to maximal, a second potentially large, a third one necessarily small, and precise values for the two Majorana phases. Adding small perturbations the predicted structure for the neutrino mass matrix is in excellent agreement with present observations and could be tested in the near future via neutrino-less double beta decay. The generalization of these results to arbitrary sew-saw models is also discussed.

  16. On Hastings' counterexamples to the minimum output entropy additivity conjecture

    E-Print Network [OSTI]

    Fernando G. S. L. Brandao; Michal Horodecki

    2009-07-19T23:59:59.000Z

    Hastings recently reported a randomized construction of channels violating the minimum output entropy additivity conjecture. Here we revisit his argument, presenting a simplified proof. In particular, we do not resort to the exact probability distribution of the Schmidt coefficients of a random bipartite pure state, as in the original proof, but rather derive the necessary large deviation bounds by a concentration of measure argument. Furthermore, we prove non-additivity for the overwhelming majority of channels consisting of a Haar random isometry followed by partial trace over the environment, for an environment dimension much bigger than the output dimension. This makes Hastings' original reasoning clearer and extends the class of channels for which additivity can be shown to be violated.

  17. Observed Minimum Illuminance Threshold for Night Market Vendors in Kenya who use LED Lamps

    SciTech Connect (OSTI)

    Johnstone, Peter; Jacobson, Arne; Mills, Evan; Radecsky, Kristen

    2009-03-21T23:59:59.000Z

    Creation of light for work, socializing, and general illumination is a fundamental application of technology around the world. For those who lack access to electricity, an emerging and diverse range of LED based lighting products hold promise for replacing and/or augmenting their current fuel-based lighting sources that are costly and dirty. Along with analysis of environmental factors, economic models for total cost-ofownership of LED lighting products are an important tool for studying the impacts of these products as they emerge in markets of developing countries. One important metric in those models is the minimum illuminance demanded by end-users for a given task before recharging the lamp or replacing batteries. It impacts the lighting service cost per unit time if charging is done with purchased electricity, batteries, or charging services. The concept is illustrated in figure 1: LED lighting products are generally brightest immediately after the battery is charged or replaced and the illuminance degrades as the battery is discharged. When a minimum threshold level of illuminance is reached, the operational time for the battery charge cycle is over. The cost to recharge depends on the method utilized; these include charging at a shop at a fixed price per charge, charging on personal grid connections, using solar chargers, and purchasing dry cell batteries. This Research Note reports on the observed"charge-triggering" illuminance level threshold for night market vendors who use LED lighting products to provide general and task oriented illumination. All the study participants charged with AC power, either at a fixed-price charge shop or with electricity at their home.

  18. Maximum Entropy Principle and the Higgs Boson Mass

    E-Print Network [OSTI]

    Alves, Alexandre; da Silva, Roberto

    2014-01-01T23:59:59.000Z

    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. Maximum Entropy Principle and the Higgs Boson Mass

    E-Print Network [OSTI]

    Alexandre Alves; Alex G. Dias; Roberto da Silva

    2014-11-18T23:59:59.000Z

    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.

  20. 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.

    1988-01-01T23:59:59.000Z

    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.

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

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

    2001-10-11T23:59:59.000Z

    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, cancels DOE P 310.1.

  2. Maximum entropy method for reconstruction of the CMB images

    E-Print Network [OSTI]

    A. T. Bajkova

    2002-05-21T23:59:59.000Z

    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.

  3. Maximum total organic carbon limit for DWPF melter feed

    SciTech Connect (OSTI)

    Choi, A.S.

    1995-03-13T23:59:59.000Z

    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.

  4. Occam's Razor Cuts Away the Maximum Entropy Principle

    E-Print Network [OSTI]

    Rudnicki, ?ukasz

    2014-01-01T23:59:59.000Z

    I show that the maximum entropy principle can be replaced by a more natural assumption, that there exists a phenomenological function of entropy consistent with the microscopic model. The requirement of existence provides then a unique construction of the related probability density. I conclude the letter with an axiomatic formulation of the notion of entropy, which is suitable for exploration of the non-equilibrium phenomena.

  5. 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.

    2007-06-23T23:59:59.000Z

    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.

  6. Beyond Boltzmann-Gibbs statistics: Maximum entropy hyperensembles out-of-equilibrium

    E-Print Network [OSTI]

    Crooks, Gavin E.

    2006-01-01T23:59:59.000Z

    1957). J. Skilling, in Maximum Entropy and Bayesian Methods,45–52. J. Skilling, in Maximum Entropy and Bayesian Methods,e C. C. Rodriguez, in Maximum Entropy and Bayesian Methods,

  7. Deriving the continuity of maximum-entropy basis functions via variational analysis

    E-Print Network [OSTI]

    Sukumar, N.; Wets, R. J. -B.

    2007-01-01T23:59:59.000Z

    and V. J. DellaPietra, A maximum entropy approach to naturalJ. and R. K. Bryan, Maximum entropy image reconstruction:Heidelberg, Continuity of maximum-entropy basis functions p

  8. PARTITIONING OF GADOLINIUM IN THE CHEMICAL PROCESSING CELL

    SciTech Connect (OSTI)

    Reboul, S.; Best, D.; Stone, M.; Click, D.

    2011-04-27T23:59:59.000Z

    A combination of short-term beaker tests and longer-duration Sludge Receipt and Adjustment Tank (SRAT) simulations were performed to investigate the relative partitioning behaviors of gadolinium and iron under conditions applicable to the Chemical Processing Cell (CPC). The testing was performed utilizing non-radioactive simple Fe-Gd slurries, non-radioactive Sludge Batch 6 simulant slurries, and a radioactive real-waste slurry representative of Sludge Batch 7 material. The testing focused on the following range of conditions: (a) Fe:Gd ratios of 25-100; (b) pH values of 2-6; (c) acidification via addition of nitric, formic, and glycolic acids; (d) temperatures of {approx}93 C and {approx}22 C; and (e) oxalate concentrations of <100 mg/kg and {approx}10,000 mg/kg. The purpose of the testing was to provide data for assessing the potential use of gadolinium as a supplemental neutron poison when dispositioning excess plutonium. Understanding of the partitioning behavior of gadolinium in the CPC was the first step in assessing gadolinium's potential applicability. Significant fractions of gadolinium partitioned to the liquid-phase at pH values of 4.0 and below, regardless of the Fe:Gd ratio. In SRAT simulations targeting nitric and formic acid additions of 150% acid stoichiometry, the pH dropped to a minimum of 3.5-4.0, and the maximum fractions of gadolinium and iron partitioning to solution were both {approx}20%. In contrast, in a SRAT simulation utilizing a nitric and formic acid addition under atypical conditions (due to an anomalously low insoluble solids content), the pH dropped to a minimum of 3.7, and the maximum fractions of gadolinium and iron partitioning to solution were {approx}60% and {approx}70%, respectively. When glycolic acid was used in combination with nitric and formic acids at 100% acid stoichiometry, the pH dropped to a minimum of 3.6-4.0, and the maximum fractions of gadolinium and iron partitioning to solution were 60-80% and 3-5%, respectively. Thus, the presence of glycolic acid increased dissolution of gadolinium, but decreased dissolution of iron. In beaker tests, the fractions of gadolinium partitioning to solution were all less than the minimum detection limits at pH 6, on the order of a few percent at pH 4, and ranging from 70-90% at pH 2. In contrast, the fractions of iron partitioning to solution were all less than the minimum detection limits at pH 6, {le} 0.04% at pH 4, and {le} 0.9% at pH 2. A possible explanation for the small magnitude of these fractions (as compared to the fractions observed in the SRAT simulations) was incomplete equilibrium, due to the short duration (30 minutes) of the beaker tests. As demonstrated by the SRAT simulations, the typical partitioning equilibration time was on the order of hours. The Fe:Gd ratio appeared to impact the extent of liquid-phase conditions under certain conditions, although the exact relationship was not clear. Temperature impacts on the liquid-phase gadolinium concentrations were modest, with liquid phase concentrations typically increasing about 25% as temperatures rose from {approx}22 C to {approx}93 C. The presence of high concentrations of oxalate did not appear to change the liquid-phase gadolinium concentrations - however, it did increase the liquid-phase iron concentrations (from being undetectable to being detectable but still minor). Additional gadolinium partitioning testing is recommended. Of greatest usefulness will be SRAT simulations focusing on a wider range of acid addition scenarios and alternate sludge compositions, particularly those specific to future sludge batches where addition of excess plutonium is being considered.

  9. General Properties on Applying the Principle of Minimum Sensitivity to High-order Perturbative QCD Predictions

    E-Print Network [OSTI]

    Yang Ma; Xing-Gang Wu; Hong-Hao Ma; Hua-Yong Han

    2015-03-17T23:59:59.000Z

    As one of the key components of perturbative QCD theory, it is helpful to find a systematic and reliable way to set the renormalization scale for a high-energy process. The conventional treatment is to take a typical momentum as the renormalization scale, which assigns an arbitrary range and an arbitrary systematic error to pQCD predictions, leading to the well-known renormalization scheme and scale ambiguities. As a practical solution for such scale setting problem, the "Principle of Minimum Sensitivity" (PMS), has been proposed in the literature. The PMS suggests to determine an optimal scale for the pQCD approximant of an observable by requiring its slope over the scheme and scale changes to vanish. In the paper, we present a detailed discussion on general properties of PMS by utilizing three quantities $R_{e^+e^-}$, $R_\\tau$ and $\\Gamma(H\\rightarrow b\\bar{b})$ up to four-loop QCD corrections. After applying the PMS, the accuracy of pQCD prediction, the pQCD convergence, the pQCD predictive power and etc., have been discussed. Furthermore, we compare PMS with another fundamental scale setting approach, i.e. the Principle of Maximum Conformality (PMC)... Our results show that PMS does provide a practical way to set the effective scale for high-energy process, and the PMS prediction agrees with the PMC one by including enough high-order QCD corrections, both of which shall be more accurate than the prediction under the conventional scale setting. However, the PMS pQCD convergence is an accidental, which usually fails to achieve a correct prediction of unknown high-order contributions with next-to-leading order QCD correction only, i.e. it is always far from the "true" values predicted by including more high-order contributions.

  10. Minimum-Bias and Early QCD Physics in ALICE

    E-Print Network [OSTI]

    Jan Fiete Grosse-Oetringhaus; for the ALICE collaboration

    2010-10-12T23:59:59.000Z

    A Large Ion Collider Experiment (ALICE) is the dedicated heavy-ion experiment at the Large Hadron Collider (LHC). In addition to its heavy-ion physics program, it also has a rich proton-proton physics program benefiting from a detector with a low momentum cut-off (pT about 50 MeV/c) and a small material budget (about 11% of a radiation length until the outer wall of the main tracking detector, the Time-Projection Chamber). ALICE has excellent means of particle identification (PID) with methods ranging from specific energy loss and time of flight to transition and Cherenkov radiation. The good primary and secondary vertex resolution allows for measurements of strangeness and heavy flavor with low backgrounds. ALICE has taken proton-proton collision data at 0.9, 2.36, and 7 TeV. In this article results of the first minimum-bias and soft-QCD measurements are presented. Inclusive pseudorapidity, multiplicity, and transverse momentum distributions are discussed as well as distributions of identified particles including strange particles. Further, results on two-pion Bose-Einstein correlations and the antiproton-to-proton ratio in collisions at the LHC are shown.

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

    E-Print Network [OSTI]

    Patrick E. McSharry; Leonard A. Smith

    1999-11-30T23:59:59.000Z

    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.

  12. Application of Maximum Entropy Method to Dynamical Fermions

    E-Print Network [OSTI]

    Jonathan Clowser; Costas Strouthos

    2001-10-16T23:59:59.000Z

    The Maximum Entropy Method is applied to dynamical fermion simulations of the (2+1)-dimensional Nambu-Jona-Lasinio model. This model is particularly interesting because at T=0 it has a broken phase with a rich spectrum of mesonic bound states and a symmetric phase where there are resonances, and hence the simple pole assumption of traditional fitting procedures breaks down. We present results extracted from simulations on large lattices for the spectral functions of the elementary fermion, the pion, the sigma, the massive pseudoscalar meson and the symmetric phase resonances.

  13. Improving predictability of time series using maximum entropy methods

    E-Print Network [OSTI]

    Gregor Chliamovitch; Alexandre Dupuis; Bastien Chopard; Anton Golub

    2014-11-28T23:59:59.000Z

    We discuss how maximum entropy methods may be applied to the reconstruction of Markov processes underlying empirical time series and compare this approach to usual frequency sampling. It is shown that, at least in low dimension, there exists a subset of the space of stochastic matrices for which the MaxEnt method is more efficient than sampling, in the sense that shorter historical samples have to be considered to reach the same accuracy. Considering short samples is of particular interest when modelling smoothly non-stationary processes, for then it provides, under some conditions, a powerful forecasting tool. The method is illustrated for a discretized empirical series of exchange rates.

  14. Reducing Degeneracy in Maximum Entropy Models of Networks

    E-Print Network [OSTI]

    Horvát, Szabolcs; Toroczkai, Zoltán

    2014-01-01T23:59:59.000Z

    Based on Jaynes's maximum entropy principle, exponential random graphs provide a family of principled models that allow the prediction of network properties as constrained by empirical data. However, their use is often hindered by the degeneracy problem characterized by spontaneous symmetry-breaking, where predictions simply fail. Here we show that degeneracy appears when the corresponding density of states function is not log-concave. We propose a solution to the degeneracy problem for a large class of models by exploiting the nonlinear relationships between the constrained measures to convexify the domain of the density of states. We demonstrate the effectiveness of the method on examples, including on Zachary's karate club network data.

  15. Improving predictability of time series using maximum entropy methods

    E-Print Network [OSTI]

    Chliamovitch, Gregor; Chopard, Bastien; Golub, Anton

    2014-01-01T23:59:59.000Z

    We discuss how maximum entropy methods may be applied to the reconstruction of Markov processes underlying empirical time series and compare this approach to usual frequency sampling. It is shown that, at least in low dimension, there exists a subset of the space of stochastic matrices for which the MaxEnt method is more efficient than sampling, in the sense that shorter historical samples have to be considered to reach the same accuracy. Considering short samples is of particular interest when modelling smoothly non-stationary processes, for then it provides, under some conditions, a powerful forecasting tool. The method is illustrated for a discretized empirical series of exchange rates.

  16. Excited nucleon spectrum from lattice QCD with maximum entropy method

    E-Print Network [OSTI]

    K. Sasaki; S. Sasaki; T. Hatsuda; M. Asakawa

    2003-09-29T23:59:59.000Z

    We study excited states of the nucleon in quenched lattice QCD with the spectral analysis using the maximum entropy method. Our simulations are performed on three lattice sizes $16^3\\times 32$, $24^3\\times 32$ and $32^3\\times 32$, at $\\beta=6.0$ to address the finite volume issue. We find a significant finite volume effect on the mass of the Roper resonance for light quark masses. After removing this systematic error, its mass becomes considerably reduced toward the direction to solve the level order puzzle between the Roper resonance $N'(1440)$ and the negative-parity nucleon $N^*(1535)$.

  17. Determination of the minimum reflux for conventional columns 

    E-Print Network [OSTI]

    Anthony, Rayford G

    1962-01-01T23:59:59.000Z

    in functional nota- tion to give c P (y) = T Bi i=1 I - 'l(K -I) si (27) where, X = (b )co/B. y=V /B. s The graph of this function is similar to that shown for P (y). r The maximum value of 'f is given by 1 max. K (28) It is necessary...- I r (30a) (3 Ob) Vf = Lf + D Vf ~ Lf I -B (30c) (30d) V ~L -B f+I & I & s+I (note: L ~L ) s-1 s (30e) Intercoolers (or heaters) were placed on a plate j if the value of L calculated on the basis of adiabatic operation of plate j differed...

  18. Campus Outdoor Lighting Standards The following standards provide for minimum safe lighting standards for outdoor area of

    E-Print Network [OSTI]

    de Lijser, Peter

    Campus Outdoor Lighting Standards The following standards provide for minimum safe lighting with a minimum of 3 foot candles. This lighting level is for daytime and at night. Public Streets Streets must have a minimum of one foot candles average with a minimum of .6 foot candles. Augmented lighting should

  19. Job Postings The question was raised about the minimum time a position should remain posted before it

    E-Print Network [OSTI]

    Martinez, Tony R.

    Job Postings 121610 The question was raised about the minimum time a position should remain: EXTERNAL JOB POSTINGS1, 2 · Staff ­ one week minimum · Administrative ­ two weeks minimum · Faculty ­ two weeks minimum 1 The recruitment process for EXTERNAL job postings may be opened to: all

  20. Probable maximum flood control; Yucca Mountain Site Characterization Project

    SciTech Connect (OSTI)

    DeGabriele, C.E.; Wu, C.L. [Bechtel National, Inc., San Francisco, CA (United States)

    1991-11-01T23:59:59.000Z

    This study proposes preliminary design concepts to protect the waste-handling facilities and all shaft and ramp entries to the underground from the probable maximum flood (PMF) in the current design configuration for the proposed Nevada Nuclear Waste Storage Investigation (NNWSI) repository protection provisions were furnished by the United States Bureau of Reclamation (USSR) or developed from USSR data. Proposed flood protection provisions include site grading, drainage channels, and diversion dikes. Figures are provided to show these proposed flood protection provisions at each area investigated. These areas are the central surface facilities (including the waste-handling building and waste treatment building), tuff ramp portal, waste ramp portal, men-and-materials shaft, emplacement exhaust shaft, and exploratory shafts facility.

  1. Maximum Margin Clustering for State Decomposition of Metastable Systems

    E-Print Network [OSTI]

    Wu, Hao

    2015-01-01T23:59:59.000Z

    When studying a metastable dynamical system, a prime concern is how to decompose the phase space into a set of metastable states. Unfortunately, the metastable state decomposition based on simulation or experimental data is still a challenge. The most popular and simplest approach is geometric clustering which is developed based on the classical clustering technique. However, the prerequisites of this approach are: (1) data are obtained from simulations or experiments which are in global equilibrium and (2) the coordinate system is appropriately selected. Recently, the kinetic clustering approach based on phase space discretization and transition probability estimation has drawn much attention due to its applicability to more general cases, but the choice of discretization policy is a difficult task. In this paper, a new decomposition method designated as maximum margin metastable clustering is proposed, which converts the problem of metastable state decomposition to a semi-supervised learning problem so that...

  2. Efficiency at maximum power of a chemical engine

    E-Print Network [OSTI]

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

    2013-01-01T23:59:59.000Z

    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

  3. Improved Maximum Entropy Analysis with an Extended Search Space

    E-Print Network [OSTI]

    Alexander Rothkopf

    2013-01-07T23:59:59.000Z

    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.

  4. Quantum maximum entropy principle for a system of identical particles

    SciTech Connect (OSTI)

    Trovato, M. [Dipartimento di Matematica, Universita di Catania, Viale A. Doria, 95125 Catania (Italy); Reggiani, L. [Dipartimento di Ingegneria dell' Innovazione and CNISM, Universita del Salento, Via Arnesano s/n, 73100 Lecce (Italy)

    2010-02-15T23:59:59.000Z

    By introducing a functional of the reduced density matrix, we generalize the definition of a quantum entropy which incorporates the indistinguishability principle of a system of identical particles. With the present definition, the principle of quantum maximum entropy permits us to solve the closure problem for a quantum hydrodynamic set of balance equations corresponding to an arbitrary number of moments in the framework of extended thermodynamics. The determination of the reduced Wigner function for equilibrium and nonequilibrium conditions is found to become possible only by assuming that the Lagrange multipliers can be expanded in powers of (Planck constant/2pi){sup 2}. Quantum contributions are expressed in powers of (Planck constant/2pi){sup 2} while classical results are recovered in the limit (Planck constant/2pi)->0.

  5. Constructing Minimum-Energy Broadcast Trees In Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Liang, Weifa

    algorithm, power awareness, ad hoc networks, energy consumption optimization, broad- cast and multicastConstructing Minimum-Energy Broadcast Trees In Wireless Ad Hoc Networks Weifa Liang Department related to power consump- tion in this kind of network. One is the minimum-energy broadcast tree problem

  6. Multichannel Blind Deconvolution of Non-minimum Phase Systems Using Information

    E-Print Network [OSTI]

    Vialatte, François

    1 Multichannel Blind Deconvolution of Non-minimum Phase Systems Using Information Backpropagation L;210 Multichannel Blind Deconvolution of Non-minimum Phase Systems Using Information Backpropagation L.-Q. Zhang, A- composition approach, for multichannel blind de- convolution of non-minimumphase systems. In 20] we has

  7. On the random 2-stage minimum spanning tree Abraham D. Flaxman

    E-Print Network [OSTI]

    Krivelevich, Michael

    On the random 2-stage minimum spanning tree Abraham D. Flaxman Department of Mathematical Sciences random variables, uniformly distributed between 0 and 1, then the expected cost of the minimum spanning tree is asymptotically equal to #16;(3) = P 1 i=1 i 3 . Here we consider the following stochastic two

  8. A simple model for evolution of proteins towards the global minimum of free energy

    E-Print Network [OSTI]

    Unger, Ron

    in a simple model of protein folding. Results: Three possible evolutionary processes are explored. First can be achieved. The assumption that proteins fold to a conformation which is in the global minimum sequences that can find the global minimum [5]. In computer science terms this means that `protein folding

  9. Changes in the Ventilation of the Oxygen Minimum Zone of the Tropical North Atlantic

    E-Print Network [OSTI]

    Changes in the Ventilation of the Oxygen Minimum Zone of the Tropical North Atlantic PETER BRANDT) ABSTRACT Changes in the ventilation of the oxygen minimum zone (OMZ) of the tropical North Atlantic centimeters per second in the depth range of the OMZ contribute to the ventilation of the OMZ. A conceptual

  10. Cooperative Repair with Minimum-Storage Regenerating Codes for Distributed Storage

    E-Print Network [OSTI]

    Li, Baochun

    Cooperative Repair with Minimum-Storage Regenerating Codes for Distributed Storage Jun Li, Baochun--Distributed storage systems store redundant data to tolerate failures of storage nodes and lost data should be repaired when storage nodes fail. A class of MDS codes, called minimum- storage regenerating (MSR) codes

  11. Guidelines for Minimum Information for Publication of Quantitative Digital PCR Experiments

    E-Print Network [OSTI]

    Magee, Joseph W.

    this process we present the Minimum Information for Publication of Quantitative Digital PCR ExperimentsGuidelines for Minimum Information for Publication of Quantitative Digital PCR Experiments Jim F Vandesompele,6 Carl T. Wittwer,12 and Stephen A. Bustin13 There is growing interest in digital PCR (dPCR) be

  12. Towards a deployable satellite gripper based on multisegment dielectric elastomer minimum energy

    E-Print Network [OSTI]

    Floreano, Dario

    Towards a deployable satellite gripper based on multisegment dielectric elastomer minimum energy dielectric elastomer minimum energy structures O. A. Araromi*a , I. Gavrilovichb , J. Shintakea , S. Rosseta , H. R. Sheaa a Microsystems For Space Technologies Laboratory, �cole Polytechnique Fédérale de

  13. Non-Additivity of Minimum Output p-$\\mathbf{R\\acute{e}nyi}$ Entropy

    E-Print Network [OSTI]

    Nengkun Yu; Mingsheng Ying

    2012-12-24T23:59:59.000Z

    Hastings disproved additivity conjecture for minimum output entropy by using random unitary channels. In this note, we employ his approach to show that minimum output $p-$R\\'{e}nyi entropy is non-additive for $p\\in(0,p_0)\\cup(1-p_0,1)$ where $p_0\\approx 0.2855$.

  14. Minimum-Energy Broadcast Using Practical Directional Antennas in All-Wireless Networks

    E-Print Network [OSTI]

    Hu, Y. Charlie

    Minimum-Energy Broadcast Using Practical Directional Antennas in All-Wireless Networks Sabyasachi ad hoc networks. Previously, minimum-energy broadcast that exploits the broadcast nature of radio not be within direct transmis- sion range of each other. Such decentralized networks can enable flexible

  15. Minimum-Energy Broadcast Using Practical Directional Antennas in All-Wireless Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    Minimum-Energy Broadcast Using Practical Directional Antennas in All-Wireless Networks Sabyasachi-- Energy-efficient broadcast communication is an important problem in wireless ad hoc networks. Previously, minimum-energy broadcast that exploits the broadcast nature of radio transmission has been studied

  16. Minimum-Energy Topology Control Algorithms in Ad Hoc Joseph Y. Halpern Li (Erran) Li

    E-Print Network [OSTI]

    Halpern, Joseph Y.

    for an extended period of time. In order to accomplish this without a renewable energy source, energy conservationMinimum-Energy Topology Control Algorithms in Ad Hoc Networks1 Joseph Y. Halpern Li (Erran) Li Dept Holmdel, NJ 07733 halpern@cs.cornell.edu erranlli@dnrc.bell-labs.com August 7, 2004 1 Based on "Minimum-Energy

  17. The Minimum Distance of Turbo-Like Codes Louay Bazzi, Mohammad Mahdian, Daniel A. Spielman

    E-Print Network [OSTI]

    Spielman, Daniel A.

    1 The Minimum Distance of Turbo-Like Codes Louay Bazzi, Mohammad Mahdian, Daniel A. Spielman Abstract--Worst-case upper bounds are derived on the minimum distance of parallel concatenated Turbo codes that parallel-concatenated Turbo codes and repeat-convolute codes with sub-linear memory are asymptotically bad

  18. Determining the minimum mass and cost of a magnetic refrigerator

    E-Print Network [OSTI]

    Bjørk, R; Bahl, C R H; Pryds, N

    2014-01-01T23:59:59.000Z

    An expression is determined for the mass of the magnet and magnetocaloric material needed for a magnetic refrigerator and these are determined using numerical modeling for both parallel plate and packed sphere bed regenerators as function of temperature span and cooling power. As magnetocaloric material Gd or a model material with a constant adiabatic temperature change, representing a infinitely linearly graded refrigeration device, is used. For the magnet a maximum figure of merit magnet or a Halbach cylinder is used. For a cost of \\$40 and \\$20 per kg for the magnet and magnetocaloric material, respectively, the cheapest 100 W parallel plate refrigerator with a temperature span of 20 K using Gd and a Halbach magnet has 0.8 kg of magnet, 0.3 kg of Gd and a cost of \\$35. Using the constant material reduces this cost to \\$25. A packed sphere bed refrigerator with the constant material costs \\$7. It is also shown that increasing the operation frequency reduces the cost. Finally, the lowest cost is also found a...

  19. Tax advantages of a deferred minimum annual royalty provision in oil and gas leases

    SciTech Connect (OSTI)

    Martin, R.B. Jr.

    1981-12-01T23:59:59.000Z

    This article describes how a deferred minimum annual royalty provision can serve to meet conflicting economic demands without adverse tax consequences. A deferred minimum annual royalty provision is an economic hybrid of a production royalty and a lease bonus. To a lessor, it has the advantage of guaranteeing a minimum return without regard to production. It should also encourage prompt development of the lease since a lessee will desire to void incurring subsequent minimum annual royalties on unproductive acreage. To an accrual-basis lessee, it has greater tax advantages than a lease bonus because it is deductible in the year paid or incurred. Although it exposes the lessee to more economic risk, this risk can be reduced through proper planning. In appropriate circumstances, a deferred minimum annual-royalty provision may therefore be worthy of consideration by either or both parties in an oil- and gas-leasing transaction. 44 references.

  20. Boiler MACT 35000FT: Maximum Achievable Control Technology

    E-Print Network [OSTI]

    Robinson, J.

    2013-01-01T23:59:59.000Z

    .2800 2.00E-03 0.022 5.70E-06 770 520 c Existing-Biomass Fuel Cells 0.0200 5.80E-03 0.022 5.70E-06 1,100 ND Existing-Biomass Hybrid Suspension Grate 0.4400 4.50E-04 0.022 5.70E-06 2...,400 2,000 c New-Biomass Dutch Ovens/Pile Burners 0.0032 3.90E-05 0.022 8.00E-07 330 520 c New-Biomass Fuel Cells 0.0200 2.90E-05 0.022 8.00E-07 910 ND New...

  1. Savannah River Site radioiodine atmospheric releases and offsite maximum doses

    SciTech Connect (OSTI)

    Marter, W.L.

    1990-11-01T23:59:59.000Z

    Radioisotopes of iodine have been released to the atmosphere from the Savannah River Site since 1955. The releases, mostly from the 200-F and 200-H Chemical Separations areas, consist of the isotopes, I-129 and 1-131. Small amounts of 1-131 and 1-133 have also been released from reactor facilities and the Savannah River Laboratory. This reference memorandum was issued to summarize our current knowledge of releases of radioiodines and resultant maximum offsite doses. This memorandum supplements the reference memorandum by providing more detailed supporting technical information. Doses reported in this memorandum from consumption of the milk containing the highest I-131 concentration following the 1961 1-131 release incident are about 1% higher than reported in the reference memorandum. This is the result of using unrounded 1-131 concentrations of I-131 in milk in this memo. It is emphasized here that this technical report does not constitute a dose reconstruction in the same sense as the dose reconstruction effort currently underway at Hanford. This report uses existing published data for radioiodine releases and existing transport and dosimetry models.

  2. Maximum gravitational-wave energy emissible in magnetar flares

    E-Print Network [OSTI]

    Alessandra Corsi; Benjamin J. Owen

    2011-02-16T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    M. Asakawa; T. Hatsuda; Y. Nakahara

    2001-02-26T23:59:59.000Z

    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.

  4. Improved Maximum Entropy Method with an Extended Search Space

    E-Print Network [OSTI]

    Alexander Rothkopf

    2012-08-25T23:59:59.000Z

    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.

  5. Maximum entropy detection of planets around active stars

    E-Print Network [OSTI]

    Petit, P; Hébrard, E; Morin, J; Folsom, C P; Böhm, T; Boisse, I; Borgniet, S; Bouvier, J; Delfosse, X; Hussain, G; Jeffers, S V; Marsden, S C; Barnes, J R

    2015-01-01T23:59:59.000Z

    (shortened for arXiv) We aim to progress towards more efficient exoplanet detection around active stars by optimizing the use of Doppler Imaging in radial velocity measurements. We propose a simple method to simultaneously extract a brightness map and a set of orbital parameters through a tomographic inversion technique derived from classical Doppler mapping. Based on the maximum entropy principle, the underlying idea is to determine the set of orbital parameters that minimizes the information content of the resulting Doppler map. We carry out a set of numerical simulations to perform a preliminary assessment of the robustness of our method, using an actual Doppler map of the very active star HR 1099 to produce a realistic synthetic data set for various sets of orbital parameters of a single planet in a circular orbit. Using a simulated time-series of 50 line profiles affected by a peak-to-peak activity jitter of 2.5 km/s, we are able in most cases to recover the radial velocity amplitude, orbital phase and o...

  6. Compatibility and toxicity of polymer-coated magnetic nanoparticles on mammalian cell systems

    E-Print Network [OSTI]

    Kral, Kelly M., 1979-

    2005-01-01T23:59:59.000Z

    (cont.) produced normal growth curves in the presence of particles. However, the particles do still exhibit some toxicity towards the cells, as the maximum cell density of cells cultured with particles does not reach that ...

  7. Maximum Power Point Tracking Control for Photovoltaic System Using Adaptive Neuro-Fuzzy

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Maximum Power Point Tracking Control for Photovoltaic System Using Adaptive Neuro- Fuzzy "ANFIS energy demand. The mathematical modeling and simulation of the photovoltaic system is implemented) like ANFIS. This paper presents Maximum Power Point Tracking Control for Photovoltaic System Using

  8. A Maximum Entropy Algorithm for Rhythmic Analysis of Genome-Wide Expression Patterns

    E-Print Network [OSTI]

    Richardson, David

    A Maximum Entropy Algorithm for Rhythmic Analysis of Genome-Wide Expression Patterns Christopher James Langmead C. Robertson McClung Bruce Randall Donald ,,,§,¶ Abstract We introduce a maximum entropy-based spectral analysis, maximum entropy spectral reconstruction is well suited to signals of the type generated

  9. 1 A MAXIMUM ENTROPY METHOD FOR SUBNETWORK ORIGIN-DESTINATION 2 TRIP MATRIX ESTIMATION

    E-Print Network [OSTI]

    Kockelman, Kara M.

    1 A MAXIMUM ENTROPY METHOD FOR SUBNETWORK ORIGIN-DESTINATION 2 TRIP MATRIX ESTIMATION 3 4 Chi Xie 5, maximum entropy, linearization 36 algorithm, column generation 37 #12;C. Xie, K.M. Kockelman and S is the trip matrix of the simplified network. This paper discusses a5 maximum entropy method

  10. Maximum entropy and Bayesian approaches to the ratio problem Edward Z. Shen*

    E-Print Network [OSTI]

    Perloff, Jeffrey M.

    Maximum entropy and Bayesian approaches to the ratio problem Edward Z. Shen* Jeffrey M. Perloff** January 2001 Abstract Maximum entropy and Bayesian approaches provide superior estimates of a ratio extra information in the supports for the underlying parameters for generalized maximum entropy (GME

  11. Comparison of Maximum Entropy and Higher-Order Entropy Estimators Amos Golan* and Jeffrey M. Perloff**

    E-Print Network [OSTI]

    Perloff, Jeffrey M.

    Comparison of Maximum Entropy and Higher-Order Entropy Estimators Amos Golan* and Jeffrey M. Perloff** ABSTRACT We show that the generalized maximum entropy (GME) is the only estimation method- classes of estimators may outperform the GME estimation rule. Keywords: generalized entropy, maximum

  12. A maximum entropy-least squares estimator for elastic origin-destination trip matrix estimation

    E-Print Network [OSTI]

    Kockelman, Kara M.

    A maximum entropy-least squares estimator for elastic origin- destination trip matrix estimation propose a combined maximum entropy-least squares (ME-LS) estimator, by which O- D flows are distributed-destination trip table; elastic demand; maximum entropy; least squares; subnetwork analysis; convex combination

  13. IDAPA 37.03.03 - Rules and Minimum Standards for the Construction...

    Open Energy Info (EERE)

    3.03 - Rules and Minimum Standards for the Construction and Use of Injection Wells Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document-...

  14. Minimum Energy Consumption in Multicomponent Distillation. 2. Three-Product Petlyuk Arrangements

    E-Print Network [OSTI]

    Skogestad, Sigurd

    of Science and Technology, N-7491 Trondheim, Norway We show that the minimum energy requirement algebraic procedure, via expressions for pinch zone compositions at the connection points as functions

  15. Online Supplement to "Bounding Distributions for the Weight of a Minimum Spanning Tree in Stochastic

    E-Print Network [OSTI]

    Shier, Douglas R.

    Online Supplement to "Bounding Distributions for the Weight of a Minimum Spanning Tree in Stochastic Networks" Kevin R. Hutson · Douglas R. Shier Department of Mathematics & Computer Science, Denison

  16. MINIMUM REJECTION SCHEDULING IN ALL-PHOTONIC NETWORKS Nahid Saberi and Mark J. Coates

    E-Print Network [OSTI]

    MINIMUM REJECTION SCHEDULING IN ALL-PHOTONIC NETWORKS Nahid Saberi and Mark J. Coates Department of Electrical and Computer Engineering McGill University Montreal, QC, Canada E-mail: nahid.saberi

  17. Energy-Efficient Distributed Constructions of Minimum Spanning Tree for Wireless Ad-hoc

    E-Print Network [OSTI]

    Khan, Maleq

    1 Energy-Efficient Distributed Constructions of Minimum Spanning Tree for Wireless Ad-hoc Networks of a class of simple and local algorithms called Nearest Neighbor Tree (NNT) algorithms for energy-efficient

  18. From Fjords to Open Seas: Ecological Genomics of Expanding Oxygen Minimum Zones (2010 JGI User Meeting)

    ScienceCinema (OSTI)

    Hallam, Steven

    2011-04-26T23:59:59.000Z

    Steven Hallam of the University of British Columbia talks "From Fjords to Open Seas: Ecological Genomics of Expanding Oxygen Minimum Zones" on March 24, 2010 at the 5th Annual DOE JGI User Meeting

  19. Introducing Minimum Fisher Regularisation Tomography to Bolometric and Soft X-ray Diagnostic Systems of the COMPASS Tokamak

    E-Print Network [OSTI]

    Introducing Minimum Fisher Regularisation Tomography to Bolometric and Soft X-ray Diagnostic Systems of the COMPASS Tokamak

  20. 322 / JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING / SEPTEMBER/OCTOBER 2000 COMPREHENSIVE DESIGN OF MINIMUM COST IRRIGATION

    E-Print Network [OSTI]

    Chahar, B. R.

    OF MINIMUM COST IRRIGATION CANAL SECTIONS By Prabhata K. Swamee,1 Govinda C. Mishra,2 and Bhagu R. Chahar3

  1. Double active shielded magnetic field gradient design with minimum inductance method

    E-Print Network [OSTI]

    Wang, Xu

    1992-01-01T23:59:59.000Z

    DOUBLE ACTIVE SHIELDED MAGNETIC FIELD GRADIENT DESIGN WITH MINIMUM INDUCTANCE METHOD A Thesis by XU WANG Submitted to the Oflice of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1992 Major Subject: Physics DOUBLE ACTIVE SHIELDED MAGNETIC FIELD GRADIENT DESIGN WITH MINIMUM INDUCTANCE METHOD A Thesis by XU WANG Approved as to style and content by: F. R. Huson (Chair of Committee) Steve Wry (Member) Edward...

  2. On-the-fly string method for minimum free energy paths calculation Luca Maragliano *, Eric Vanden-Eijnden 1

    E-Print Network [OSTI]

    Van Den Eijnden, Eric

    On-the-fly string method for minimum free energy paths calculation Luca Maragliano *, Eric Vanden and simplified version of the string method in collective variables for computing minimum free energy paths) the minimum free energy path (MFEP) plays an important role. Given a set of collective variables to describe

  3. Maximum velocity of self-propulsion for an active segment

    E-Print Network [OSTI]

    Recho, Pierre

    2015-01-01T23:59:59.000Z

    The motor part of a crawling eukaryotic cell can be represented schematically as an active continuum layer. The main active processes in this layer are protrusion, originating from non-equilibrium polymerization of actin fibers, contraction, induced by myosin molecular motors and attachment due to active bonding of trans-membrane proteins to a substrate. All three active mechanisms are regulated by complex signaling pathways involving chemical and mechanical feedback loops whose microscopic functioning is still poorly understood. In this situation, it is instructive to take a reverse engineering approach and study a problem of finding the spatial organization of standard active elements inside a crawling layer ensuring an optimal cost-performance trade-off. In this paper we assume that (in the range of interest) the energetic cost of self-propulsion is velocity independent and adopt, as an optimality criterion, the maximization of the overall velocity. We then choose a prototypical setting, formulate the corr...

  4. Photoelectrochemical cell

    DOE Patents [OSTI]

    Rauh, R. David (Newton, MA); Boudreau, Robert A. (Norton, MA)

    1983-06-14T23:59:59.000Z

    A photoelectrochemical cell comprising a sealed container having a light-transmitting window for admitting light into the container across a light-admitting plane, an electrolyte in the container, a photoelectrode in the container having a light-absorbing surface arranged to receive light from the window and in contact with the electrolyte, the surface having a plurality of spaced portions oblique to the plane, each portion having dimensions at least an order of magnitude larger than the maximum wavelength of incident sunlight, the total surface area of the surface being larger than the area of the plane bounded by the container, and a counter electrode in the container in contact with the electrolyte.

  5. On the critical flame radius and minimum ignition energy for spherical flame initiation

    SciTech Connect (OSTI)

    Chen, Zheng; Burke, M. P.; Ju, Yiguang

    2011-01-01T23:59:59.000Z

    Spherical flame initiation from an ignition kernel is studied theoretically and numerically using different fuel/oxygen/helium/argon mixtures (fuel: hydrogen, methane, and propane). The emphasis is placed on investigating the critical flame radius controlling spherical flame initiation and its correlation with the minimum ignition energy. It is found that the critical flame radius is different from the flame thickness and the flame ball radius and that their relationship depends strongly on the Lewis number. Three different flame regimes in terms of the Lewis number are observed and a new criterion for the critical flame radius is introduced. For mixtures with Lewis number larger than a critical Lewis number above unity, the critical flame radius is smaller than the flame ball radius but larger than the flame thickness. As a result, the minimum ignition energy can be substantially over-predicted (under-predicted) based on the flame ball radius (the flame thickness). The results also show that the minimum ignition energy for successful spherical flame initiation is proportional to the cube of the critical flame radius. Furthermore, preferential diffusion of heat and mass (i.e. the Lewis number effect) is found to play an important role in both spherical flame initiation and flame kernel evolution after ignition. It is shown that the critical flame radius and the minimum ignition energy increase significantly with the Lewis number. Therefore, for transportation fuels with large Lewis numbers, blending of small molecule fuels or thermal and catalytic cracking will significantly reduce the minimum ignition energy.

  6. Counterexamples to additivity of minimum output p-Renyi entropy for p close to 0

    E-Print Network [OSTI]

    Toby Cubitt; Aram W. Harrow; Debbie Leung; Ashley Montanaro; Andreas Winter

    2008-02-14T23:59:59.000Z

    Complementing recent progress on the additivity conjecture of quantum information theory, showing that the minimum output p-Renyi entropies of channels are not generally additive for p>1, we demonstrate here by a careful random selection argument that also at p=0, and consequently for sufficiently small p, there exist counterexamples. An explicit construction of two channels from 4 to 3 dimensions is given, which have non-multiplicative minimum output rank; for this pair of channels, numerics strongly suggest that the p-Renyi entropy is non-additive for all p additivity exist for all p<1.

  7. Cell reorientation under cyclic stretching

    E-Print Network [OSTI]

    Ariel Livne; Eran Bouchbinder; Benjamin Geiger

    2014-12-01T23:59:59.000Z

    Mechanical cues from the extracellular microenvironment play a central role in regulating the structure, function and fate of living cells. Nevertheless, the precise nature of the mechanisms and processes underlying this crucial cellular mechanosensitivity remains a fundamental open problem. Here we provide a novel framework for addressing cellular sensitivity and response to external forces by experimentally and theoretically studying one of its most striking manifestations -- cell reorientation to a uniform angle in response to cyclic stretching of the underlying substrate. We first show that existing approaches are incompatible with our extensive measurements of cell reorientation. We then propose a fundamentally new theory that shows that dissipative relaxation of the cell's passively-stored, two-dimensional, elastic energy to its minimum actively drives the reorientation process. Our theory is in excellent quantitative agreement with the complete temporal reorientation dynamics of individual cells, measured over a wide range of experimental conditions, thus elucidating a basic aspect of mechanosensitivity.

  8. The number e^{(1/2)} is the ratio between the time of maximum value and the time of maximum growth rate for restricted growth phenomena?

    E-Print Network [OSTI]

    Zi-Niu Wu

    2013-10-02T23:59:59.000Z

    For many natural process of growth, with the growth rate independent of size due to Gibrat law and with the growth process following a log-normal distribution, the ratio between the time (D) for maximum value and the time (L) for maximum growth rate (inflexion point) is then equal to the square root of the base of the natural logarithm (e^{1/2}). On the logarithm scale this ratio becomes one half ((1/2)). It remains an open question, due to lack of complete data for various cases with restricted growth, whether this e^{1/2} ratio can be stated as e^{1/2}-Law. Two established examples already published, one for an epidemic spreading and one for droplet production, support however this ratio. Another example appears to be the height of humain body. For boys the maximum height occurs near 23 years old while the maximum growth rate is at the age near 14, and there ratio is close to e^{1/2}. The main theoretical base to obtain this conclusion is problem independent, provided the growth process is restricted, such as public intervention to control the spreading of communicable epidemics, so that an entropy is associated with the process and the role of dissipation, representing the mechanism of intervention, is maximized. Under this formulation the principle of maximum rate of entropy production is used to make the production process problem independent.

  9. Use of Two Distillation Columns in Systems with Maximum Temperature Limitations

    E-Print Network [OSTI]

    Gilchrist, James F.

    Use of Two Distillation Columns in Systems with Maximum Temperature Limitations Rebecca H. Masel, Pennsylvania 18015, United States ABSTRACT: Maximum temperature limitations are encountered in distillation of the bottoms product fixes the column base pressure and, hence, the condenser pressure. The distillate

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

    E-Print Network [OSTI]

    Pedram, Massoud

    chargers do not perform the maximum power point tracking [2], [3] of the solar panel. We excludeMaximum Power Transfer Tracking in a Solar USB Charger for Smartphones Abstract--Battery life poor capacity utilization during solar energy harvesting. In this paper, we propose and demonstrate

  11. 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 frictional dissipation rate balances the energy production rate near the radius of maximum wind (RMW

  12. 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 frictional dissipation rate balances the energy production rate near the radius of maximum wind (RMW

  13. Efficiency at maximum power of low dissipation Carnot engines Massimiliano Esposito

    E-Print Network [OSTI]

    Kawai, Ryoichi

    Efficiency at maximum power of low dissipation Carnot engines Massimiliano Esposito Center the efficiency at maximum power, , of engines performing finite-time Carnot cycles between a hot and a cold reservoir at temperatures Th and Tc, respectively. For engines reaching Carnot efficiency C = 1 - Tc

  14. An Improved Maximum Likelihood Formulation for Accurate Genome Assembly Aditya Varma, Abhiram Ranade and Srinivas Aluru

    E-Print Network [OSTI]

    Ranade, Abhiram G.

    An Improved Maximum Likelihood Formulation for Accurate Genome Assembly Aditya Varma, Abhiram maximum likelihood method for genome assembly. We formulate the problem as one of direct convex estimate of the length of the genome or the need to use further expectation minimization to predict

  15. How Is the Maximum Entropy of a Quantized Surface Related to Its Area?

    E-Print Network [OSTI]

    I. B. Khriplovich; R. V. Korkin

    2001-12-27T23:59:59.000Z

    The maximum entropy of a quantized surface is demonstrated to be proportional to the surface area in the classical limit. The result is valid in loop quantum gravity, and in a somewhat more general class of approaches to surface quantization. The maximum entropy is calculated explicitly for some specific cases.

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

    E-Print Network [OSTI]

    Tadi?, Vladislav B

    2009-01-01T23:59:59.000Z

    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.

  17. Unification of Field Theory and Maximum Entropy Methods for Learning Probability Densities

    E-Print Network [OSTI]

    Kinney, Justin B

    2014-01-01T23:59:59.000Z

    Bayesian field theory and maximum entropy are two methods for learning smooth probability distributions (a.k.a. probability densities) from finite sampled data. Both methods were inspired by statistical physics, but the relationship between them has remained unclear. Here I show that Bayesian field theory subsumes maximum entropy density estimation. In particular, the most common maximum entropy methods are shown to be limiting cases of Bayesian inference using field theory priors that impose no boundary conditions on candidate densities. This unification provides a natural way to test the validity of the maximum entropy assumption on one's data. It also provides a better-fitting nonparametric density estimate when the maximum entropy assumption is rejected.

  18. A Laser Range Scanner Designed for Minimum Calibration Complexity James Davis, Xing Chen

    E-Print Network [OSTI]

    Stanford University

    A Laser Range Scanner Designed for Minimum Calibration Complexity James Davis, Xing Chen Computer are a popular method for acquiring three-dimensional geometry due to their accuracy and robustness. Maximizing a two camera range scanner design, specifically chosen to minimize calibration complexity and cost

  19. Finding the Energy Efficient Curve: Gate Sizing for Minimum Power under Delay Constraints

    E-Print Network [OSTI]

    Kolodny, Avinoam

    Finding the Energy Efficient Curve: Gate Sizing for Minimum Power under Delay Constraints Yoni in a fast circuit by the same factor does not yield an energy-efficient design, and we characterize efficient. A design implementation is considered to be energy efficient when it has the highest performance

  20. The Blob Code is Competitive with EdgeSets in Genetic Algorithms for the Minimum

    E-Print Network [OSTI]

    Julstrom, Bryant A.

    with those of, a GA that encodes spanning trees as edge-sets on Euclidean instances of the minimum rout- ing Spanning Tree Problem Bryant A. Julstrom Department of Computer Science St. Cloud State University St. Cloud, MN, 56301 USA julstrom@stcloudstate.edu ABSTRACT Among the many codings of spanning trees

  1. Integrated Column Designs for Minimum Energy and Entropy Requirements in Multicomponent Distillation

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Distillation Ivar J. Halvorsen1 and Sigurd Skogestad Norwegian University of Science and Technology, Department at the Topical conference on Separations Technology, Session 23 - Distillation Modeling and Processes II. 2001 Column Designs for Minimum Energy and Entropy Requirements in Multicomponent Distillation Ivar J

  2. Graphical Visualisation of Minimum Energy Requirements for Multi-Effect Distillation Arrangements

    E-Print Network [OSTI]

    Skogestad, Sigurd

    1 Graphical Visualisation of Minimum Energy Requirements for Multi-Effect Distillation Arrangements-integrated multi-effect and three non-integrated distillation arrangements for separating a ternary mixture have been considered. The focus of the paper is on a heat-integrated complex distillation configuration

  3. eVADER: A Perceptual Approach to Finding Minimum Warning Sound Requirements for Quiet Cars.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , such as hybrid and electric vehicles, to pedestrians has become an important issue for public policy [1], car a localization paradigm to test the detectability of hybrid and internal combustion cars by measuring listenereVADER: A Perceptual Approach to Finding Minimum Warning Sound Requirements for Quiet Cars. Ryan

  4. Analysis on Achieving a Minimum Bunch Length in LCLS Bunch Compressor One

    SciTech Connect (OSTI)

    Sun, Yipeng; Huang, Zhirong; Ding, Yuantao; Wu, Juhao; /SLAC; ,

    2011-08-19T23:59:59.000Z

    An ultra-short bunch is required by different applications in many aspects. In this paper, the condition to achieve a minimum bunch length at the Linac Coherent Light Source (LCLS) [1] bunch compressor one (BC1) is analyzed analytically and evaluated by simulation. The space charge, wake field and coherent synchrotron radiation (CSR) effects are not discussed here.

  5. LOWER BOUNDS ON THE GLOBAL MINIMUM OF A M. GHASEMI, J.B. LASSERRE, M. MARSHALL

    E-Print Network [OSTI]

    Marshall, Murray

    LOWER BOUNDS ON THE GLOBAL MINIMUM OF A POLYNOMIAL M. GHASEMI, J.B. LASSERRE, M. MARSHALL Abstract. We extend the method of Ghasemi and Marshall [SIAM. J. Opt. 22(2) (2012), pp 460-473], to obtain compare this bound with the (global) lower bound fgp ob- tained by Ghasemi and Marshall, and also

  6. Minimum Bit Error Probability of Large Randomly Spread MCCDMA Systems in

    E-Print Network [OSTI]

    Müller, Ralf R.

    Minimum Bit Error Probability of Large Randomly Spread MC­CDMA Systems in Multipath Rayleigh Fading, to calculate the bit error proba­ bility in the large system limit for randomly assigned spreading sequences detec­ tion with is accurate if the number of users and the spreading factor are large. His calculations

  7. Minimum Bit Error Probability of Large Randomly Spread MC-CDMA Systems in

    E-Print Network [OSTI]

    Müller, Ralf R.

    Minimum Bit Error Probability of Large Randomly Spread MC-CDMA Systems in Multipath Rayleigh Fading, to calculate the bit error proba- bility in the large system limit for randomly assigned spreading sequences detec- tion with is accurate if the number of users and the spreading factor are large. His calculations

  8. A steady-state L-mode tokamak fusion reactor : large scale and minimum scale

    E-Print Network [OSTI]

    Reed, Mark W. (Mark Wilbert)

    2010-01-01T23:59:59.000Z

    We perform extensive analysis on the physics of L-mode tokamak fusion reactors to identify (1) a favorable parameter space for a large scale steady-state reactor and (2) an operating point for a minimum scale steady-state ...

  9. Minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems

    SciTech Connect (OSTI)

    Jordan, W.C.; Turner, J.C.

    1992-12-01T23:59:59.000Z

    A parametric calculational analysis has been performed in order to estimate the minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems. The analysis was performed using a version of the SCALE-4.0 code system and the 27-group ENDF/B-IV cross-section library. Water-moderated uranyl fluoride (UO[sub 2]F[sub 2] and H[sub 2]O) and hydrofluoric-acid-moderated uranium hexaflouride (UF[sub 6] and HF) systems were considered in the analysis over enrichments of 1.4 to 5 wt % [sup 235]U. Estimates of the minimum critical volume, minimum critical mass of uranium, and the minimum mass of moderator required for criticality are presented. There was significant disagreement between the values generated in this study when compared with a similar undocumented study performed in 1983 using ANISN and the Knight-modified Hansen-Roach cross sections. An investigation into the cause of the disagreement was made, and the results are presented.

  10. Minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems

    SciTech Connect (OSTI)

    Jordan, W.C.; Turner, J.C.

    1992-12-01T23:59:59.000Z

    A parametric calculational analysis has been performed in order to estimate the minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems. The analysis was performed using a version of the SCALE-4.0 code system and the 27-group ENDF/B-IV cross-section library. Water-moderated uranyl fluoride (UO{sub 2}F{sub 2} and H{sub 2}O) and hydrofluoric-acid-moderated uranium hexaflouride (UF{sub 6} and HF) systems were considered in the analysis over enrichments of 1.4 to 5 wt % {sup 235}U. Estimates of the minimum critical volume, minimum critical mass of uranium, and the minimum mass of moderator required for criticality are presented. There was significant disagreement between the values generated in this study when compared with a similar undocumented study performed in 1983 using ANISN and the Knight-modified Hansen-Roach cross sections. An investigation into the cause of the disagreement was made, and the results are presented.

  11. Minimum Energy Consumption in Multicomponent Distillation. 3. More Than Three Products and Generalized Petlyuk Arrangements

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Minimum Energy Consumption in Multicomponent Distillation. 3. More Than Three Products products (where normally M e N). We derive the expressions for a generalized extended Pet- lyuk arrangement for the generalized Pet- lyuk column with more than three products. The Vmin diagram was presented in part 1

  12. Speech enhancement using a minimum mean-square error short-time spectral modulation magnitude estimator

    E-Print Network [OSTI]

    Speech enhancement using a minimum mean-square error short-time spectral modulation magnitude In this paper we investigate the enhancement of speech by applying MMSE short-time spectral magnitude estimation on the quality of enhanced speech, and find that this method works better with speech uncertainty. Finally we

  13. A design solution to the problem of adaptive output regulation for nonlinear minimum-phase systems

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in the spirit of the internal model principle, the control law needed to fulfill the regulation objective. In [3 regulation and solved by using an "hybrid" control strategy. In that paper it was emphasized how persistenceA design solution to the problem of adaptive output regulation for nonlinear minimum-phase systems

  14. Bachelor of Science with Major in Geology (Minimum of 120 credits required)

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Bachelor of Science with Major in Geology (Minimum of 120 credits required) The Bachelor of Science (B.S.) degree is designed for students planning professional careers in geology, hydrogeology work in geology, geosciences and environmental science. Prerequisite Coursework for Transfer Students

  15. Bachelor of Arts with Major in Geology: Earth and Space Science (Minimum of 120 credits required)

    E-Print Network [OSTI]

    Belogay, Eugene A.

    Bachelor of Arts with Major in Geology: Earth and Space Science (Minimum of 120 credits required) The Bachelor of Arts (B.A.) degree in Geology (Earth Science) is designed for students planning professional 2053 & 2048L 5 College Algebra MAC 1105 3 Introductory Statistics STA 2023 3 Total 19 Geology (Earth

  16. Jet Interaction and the Influence of a Minimum Phase Speed Bound on the Propagation of Eddies

    E-Print Network [OSTI]

    Vallis, Geoff

    Jet Interaction and the Influence of a Minimum Phase Speed Bound on the Propagation of Eddies and analogs of the midlatitude eddy-driven jet and the subtropical jet is investigated in a barotropic b-plane model. In the model the subtropical jet is generated by a relaxation process and the eddy-driven jet

  17. Boundaries of the Peruvian Oxygen Minimum Zone shaped by coherent mesoscale dynamics

    E-Print Network [OSTI]

    Bettencourt, João H; García, Emilio Hernández; Montes, Ivonne; Sudre, Joël; Dewitte, Boris; Paulmier, Aurélien; Garçon, Véronique

    2015-01-01T23:59:59.000Z

    Dissolved oxygen in sea water is a major factor affecting marine habitats and biogeochemical cycles. Oceanic zones with oxygen deficits represent significant portions of the area and volume of the oceans and are thought to be expanding. The Peruvian oxygen minimum zone is one of the most pronounced and lies in a region of strong mesoscale activity in the form of vortices and frontal regions, whose effect in the dynamics of the oxygen minimum zone is largely unknown. Here, we study this issue from a modeling approach and a Lagrangian point of view, using a coupled physical-biogeochemical simulation of the Peruvian oxygen minimum zone and finite-size Lyapunov exponent fields to understand the link between mesoscale dynamics and oxygen variations. Our results show that, at depths between 380 and 600 meters, mesoscale structures have a relevant dual role. First, their mean positions and paths delimit and maintain the oxygen minimum zone boundaries. Second, their high frequency fluctuations entrain oxygen across t...

  18. Minimum Interference Channel Assignment in Multi-Radio Wireless Mesh Networks

    E-Print Network [OSTI]

    Gupta, Himanshu

    program and a linear program formulation of our optimization problem to obtain lower bounds on overall Mesh Networks, Channel Assignment, Graph Coloring, Interference, Mathe- matical Programming. I1 Minimum Interference Channel Assignment in Multi-Radio Wireless Mesh Networks Anand Prabhu

  19. A minimum-reaction-flux solution to master-equation models of protein folding

    E-Print Network [OSTI]

    Weston, Ken

    A minimum-reaction-flux solution to master-equation models of protein folding Huan-Xiang Zhoua; published online 20 May 2008 Master equations are widely used for modeling protein folding. Here- ceptual and quantitative models for protein folding.1­15 In such models, the conformational space

  20. String method in collective variables: Minimum free energy paths and isocommittor surfaces

    E-Print Network [OSTI]

    Van Den Eijnden, Eric

    York University, New York, New York 10012 Giovanni Ciccottid INFM and Dipartimento di Fisica in the free energy. Provided that the number of collective variables is large enough, the new techniqueString method in collective variables: Minimum free energy paths and isocommittor surfaces Luca

  1. The stackelberg minimum spanning tree game on planar and bounded-treewidth graphs

    E-Print Network [OSTI]

    Cardinal, Jean

    The Stackelberg Minimum Spanning Tree Game is a two-level combinatorial pricing problem introduced at WADS’07. The game is played on a graph, whose edges are colored either red or blue, and where the red edges have a given ...

  2. Rules Establishing Minimum Standards Relating to Location, Design, Construction, and Maintenance of Onsite Wastewater Treatment Systems (Rhode Island)

    Broader source: Energy.gov [DOE]

    The purpose of these rules is to protect public health and the environment by establishing minimum standards for the proper location, design, construction and maintenance of onsite wastewater...

  3. These special appetizers are assembled on site for maximum freshness and require that an attendant be on site at your event. Minimum order is 2 dozen for each item.

    E-Print Network [OSTI]

    Schladow, S. Geoffrey

    Rolls, But- ter, a Spring Dessert, Coffee, Decaf, Hot Tea and Iced Water with Lemon. Jalapeño Marinated Artisan Rolls, Parmesan Crisps, Butter and Coffee, Decaf, Hot Tea and Iced Water with Lemon. Creamy Potato of Grilled Tri-Tip Steak on a bed of Romaine with a Black Bean & Corn Relish and Grape Tomatoes with a South

  4. Estimate of Technical Potential for Minimum Efficiency Performance Standards in 13 Major World Economies

    E-Print Network [OSTI]

    Letschert, Virginie

    2013-01-01T23:59:59.000Z

    is the case for gas water heaters and furnaces, the maximum-traditional storage tank water heaters and heat-pump or16 Table 6. Electric Storage Water Heater

  5. The Bachelor of Management degree in International Management is a minimum of 40 courses in length. Admission to the Faculty may occur at the end of Year One. Students are required to have completed the following courses, with a minimum

    E-Print Network [OSTI]

    Seldin, Jonathan P.

    *Management 4640 - Cross-Cultural Work Study Four courses at the 3000/4000 level from any faculty A minimumThe Bachelor of Management degree in International Management is a minimum of 40 courses in length) and Statistics 1770. Admission to Management programs is competitive and is based on academic achievement prior

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

    E-Print Network [OSTI]

    Tamhane, Ajit C.

    by a linear response function. It is shown that the two minima are attained under step and linear response from below by a linear response function. It is shown that the two minima are attained under step overall power and minimum power under the constraint that the dose response function is bounded from below

  7. International Minor in Engineering: Japanese Studies Language: maximum of 12 semester hours # of sem hours

    E-Print Network [OSTI]

    Lee, Tonghun

    to Classical Japanese 3 409 Social Science Reading in Japanese 3 (H) 440/441 Fourth Year Japanese I/II 3 Other: minimum of 9 semester hours including one 300- or 400-level course and one Political Science (same as EALC 402) 3 MACS 466 Japanese Cinema (same as EALC 466) 3 EALC 250 Introduction to Japanese

  8. Design Considerations for an On-Demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network

    E-Print Network [OSTI]

    Brown, Timothy X.

    1 Design Considerations for an On-Demand Minimum Energy Routing Protocol for a Wireless Ad Hoc- demand minimum energy routing protocol and suggests mechanisms for their implementation. We highlight of an 'energy aware' link cache for storing this information. We also compare the performance of an on-demand

  9. Optimal design and allocation of electrified vehicles and dedicated charging infrastructure for minimum life cycle greenhouse gas emissions and cost

    E-Print Network [OSTI]

    Michalek, Jeremy J.

    for minimum life cycle greenhouse gas emissions and cost Elizabeth Traut a,n , Chris Hendrickson b,1 , Erica and dedicated workplace charging infrastructure in the fleet for minimum life cycle cost or GHG emissions over vehicle and battery costs are the major drivers for PHEVs and BEVs to enter and dominate the cost

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

    E-Print Network [OSTI]

    Dail, Holly Janine

    2012-01-01T23:59:59.000Z

    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? ...

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

    E-Print Network [OSTI]

    Dahl, Kristina Ariel

    2005-01-01T23:59:59.000Z

    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 ...

  12. Investigating the angle or response and maximum stability of a cohesive granular pile

    E-Print Network [OSTI]

    Nowak, Sara Alice, 1982-

    2004-01-01T23:59:59.000Z

    In this thesis, I investigate the static and dynamic properties of a granular heap made cohesive by an interstitial fluid. I present the results of experimental work measuring the maximum angle of stability and the angle ...

  13. Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic

    E-Print Network [OSTI]

    Wunsch, Carl

    Proxies indicate that the Last Glacial Maximum (LGM) Atlantic Ocean was marked by increased meridional and zonal near sea surface temperature gradients relative to today. Using a least squares fit of a full general circulation ...

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

    E-Print Network [OSTI]

    Kroeger, Timothy H

    2013-09-19T23:59:59.000Z

    , revealing the premixed and diffusion burn fractions as well as important engine and exhaust design criteria such as maximum in-cylinder pressure and exhaust composition. These results are significant in diesel engine design because cheaper, lighter engines...

  15. 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 ...

  16. 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

  17. Maximum Network Lifetime in Wireless Sensor Networks with Adjustable Sensing Ranges

    E-Print Network [OSTI]

    Wu, Jie

    1 Maximum Network Lifetime in Wireless Sensor Networks with Adjustable Sensing Ranges Mihaela problem in wireless sensor networks with adjustable sensing range. Communication and sensing consume Wireless sensor networks (WSNs) constitute the foundation of a broad range of applications related

  18. Parameterization of Maximum Wave Heights Forced by Hurricanes: Application to Corpus Christi, Texas

    E-Print Network [OSTI]

    Taylor, Sym 1978-

    2012-12-07T23:59:59.000Z

    sensitivity based on the investigation of several hurricane parameters. Also presented is the development of parameterized maximum significant wave height models. These are determined by incorporating three forms of an equivalent fetch into (1) dimensionless...

  19. A more efficient formulation for computation of the maximum loading points in electric power systems

    SciTech Connect (OSTI)

    Chiang, H.D. [Cornell Univ., Ithaca, NY (United States). School of Electrical Engineering; Jean-Jumeau, R. [Electricite d`Haita, Port-au-Prince (Haiti)

    1995-05-01T23:59:59.000Z

    This paper presents a more efficient formulation for computation of the maximum loading points. A distinguishing feature of the new formulation is that it is of dimension (n + 1), instead of the existing formulation of dimension (2n + 1), for n-dimensional load flow equations. This feature makes computation of the maximum loading points very inexpensive in comparison with those required in the existing formulation. A theoretical basis for the new formulation is provided. The new problem formulation is derived by using a simple reparameterization scheme and exploiting the special properties of the power flow model. Moreover, the proposed test function is shown to be monotonic in the vicinity of a maximum loading point. Therefore, it allows one to monitor the approach to maximum loading points during the solution search process. Simulation results on a 234-bus system are presented.

  20. Acoustic Space Dimensionality Selection and Combination using the Maximum Entropy Principle 

    E-Print Network [OSTI]

    Abdel-Haleem, Yasser H; Renals, Steve; Lawrence, Neil D

    2004-01-01T23:59:59.000Z

    In this paper we propose a discriminative approach to acoustic space dimensionality selection based on maximum entropy modelling. We form a set of constraints by composing the acoustic space with the space of phone classes, and use a continuous...

  1. An Analysis of Maximum Residential Energy Efficiency in Hot and Humid Climates 

    E-Print Network [OSTI]

    Malhotra, M.; Haberl, J. S.

    2006-01-01T23:59:59.000Z

    Systems in Hot and Humid Climates, Orlando, Florida, July 24-26, 2006 Methodology 1. Development of the Basecase Simulation Model 2. Analysis of Energy Saving Measures 3. Development of the Maximum Energy-Efficient House 4. Economic Analysis DOE-2 Input...AN ANALYSIS OF MAXIMUM RESIDENTIAL ENERGY EFFICIENCY IN HOT AND HUMID CLIMATES Mini Malhotra Graduate Research Assistant Jeff Haberl, Ph.D., P.E. Professor/Associate Director Energy Systems Laboratory, Texas A&M University College...

  2. ON THE PROBLEM OF UNIQUENESS FOR THE MAXIMUM STIRLING NUMBER(S) OF THE SECOND KIND

    E-Print Network [OSTI]

    Pomerance, Carl

    ON THE PROBLEM OF UNIQUENESS FOR THE MAXIMUM STIRLING NUMBER(S) OF THE SECOND KIND E. Rodney Say that an integer n is exceptional if the maximum Stirling number of the second kind S(n, k) occurs or equal to x is O(x3/5+ ), for any > 0. 1. Introduction Let S(n, k) be the Stirling number of the second

  3. A stochastic model for sediment yield using the Principle of Maximum Entropy

    E-Print Network [OSTI]

    Singh, V. P.; Krstanovic, P. F.

    WATER RESOURCES RESEARCH, VOL. 23, NO. 5, PAGES 781-793, MAY 1987 A Stochastic Model for Sediment Yield Using the Principle of Maximum Entropy V. P. SINGH AND P. F. KRSTANOVIC Department of Civil Engineering, Louisiana State University, Baton... Rouge The principle of maximum entropy was applied to derive a stochastic model for sediment yield from upland watersheds. By maximizing the conditional entropy subject to certain constraints, a probability distribution of sediment yield conditioned...

  4. Heterogeneity-corrected vs -uncorrected critical structure maximum point doses in breast balloon brachytherapy

    SciTech Connect (OSTI)

    Kim, Leonard, E-mail: kimlh@umdnj.edu [Department of Radiation Oncology, Cancer Institute of New Jersey, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, New Brunswick, NJ (United States); Narra, Venkat; Yue, Ning [Department of Radiation Oncology, Cancer Institute of New Jersey, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, New Brunswick, NJ (United States)

    2013-07-01T23:59:59.000Z

    Recent studies have reported potentially clinically meaningful dose differences when heterogeneity correction is used in breast balloon brachytherapy. In this study, we report on the relationship between heterogeneity-corrected and -uncorrected doses for 2 commonly used plan evaluation metrics: maximum point dose to skin surface and maximum point dose to ribs. Maximum point doses to skin surface and ribs were calculated using TG-43 and Varian Acuros for 20 patients treated with breast balloon brachytherapy. The results were plotted against each other and fit with a zero-intercept line. Max skin dose (Acuros) = max skin dose (TG-43) ? 0.930 (R{sup 2} = 0.995). The average magnitude of difference from this relationship was 1.1% (max 2.8%). Max rib dose (Acuros) = max rib dose (TG-43) ? 0.955 (R{sup 2} = 0.9995). The average magnitude of difference from this relationship was 0.7% (max 1.6%). Heterogeneity-corrected maximum point doses to the skin surface and ribs were proportional to TG-43-calculated doses. The average deviation from proportionality was 1%. The proportional relationship suggests that a different metric other than maximum point dose may be needed to obtain a clinical advantage from heterogeneity correction. Alternatively, if maximum point dose continues to be used in recommended limits while incorporating heterogeneity correction, institutions without this capability may be able to accurately estimate these doses by use of a scaling factor.

  5. A minimum hypothesis explanation for an IMF with a lognormal body and power law tail

    E-Print Network [OSTI]

    Shantanu Basu; C. E. Jones

    2004-11-15T23:59:59.000Z

    We present a minimum hypothesis model for an IMF that resembles a lognormal distribution at low masses but has a distinct power-law tail. Even if the central limit theorem ensures a lognormal distribution of condensation masses at birth, a power-law tail in the distribution arises due to accretion from the ambient cloud, coupled with a non-uniform (exponential) distribution of accretion times.

  6. LIGHT SUBGRAPHS IN PLANAR GRAPHS OF MINIMUM DEGREE 4 AND EDGE-DEGREE 9

    E-Print Network [OSTI]

    Mohar, Bojan

    LIGHT SUBGRAPHS IN PLANAR GRAPHS OF MINIMUM DEGREE 4 AND EDGE-DEGREE 9 B. MOHAR , R. SKREKOVSKI vertices of degree 4 are adjacent. A graph H is light in G if there is a constant w such that every graph is w. Then we also write w(H) w. It is proved that the cycle Cs is light if and only if 3 s 6, where

  7. THINNING OF THE SUN'S MAGNETIC LAYER: THE PECULIAR SOLAR MINIMUM COULD HAVE BEEN PREDICTED

    SciTech Connect (OSTI)

    Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Broomhall, Anne-Marie; Chaplin, William J.; Elsworth, Yvonne, E-mail: sarbani.basu@yale.edu [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom)

    2012-10-10T23:59:59.000Z

    The solar magnetic activity cycle causes changes in the Sun on timescales that are equivalent to human lifetimes. The minimum solar activity that preceded the current solar cycle (cycle 24) was deeper and quieter than any other recent minimum. Using data from the Birmingham Solar Oscillations Network (BiSON), we show that the structure of the solar sub-surface layers during the descending phase of the preceding cycle (cycle 23) was very different from that during cycle 22. This leads us to believe that a detailed examination of the data would have led to the prediction that the cycle 24 minimum would be out of the ordinary. The behavior of the oscillation frequencies allows us to infer that changes in the Sun that affected the oscillation frequencies in cycle 23 were localized mainly to layers above about 0.996 R{sub Sun }, depths shallower than about 3000 km. In cycle 22, on the other hand, the changes must have also occurred in the deeper-lying layers.

  8. Free Magnetic Energy in Solar Active Regions above the Minimum-Energy Relaxed State

    E-Print Network [OSTI]

    S. Regnier; E. R. Priest

    2008-05-12T23:59:59.000Z

    To understand the physics of solar flares, including the local reorganisation of the magnetic field and the acceleration of energetic particles, we have first to estimate the free magnetic energy available for such phenomena, which can be converted into kinetic and thermal energy. The free magnetic energy is the excess energy of a magnetic configuration compared to the minimum-energy state, which is a linear force-free field if the magnetic helicity of the configuration is conserved. We investigate the values of the free magnetic energy estimated from either the excess energy in extrapolated fields or the magnetic virial theorem. For four different active regions, we have reconstructed the nonlinear force-free field and the linear force-free field corresponding to the minimum-energy state. The free magnetic energies are then computed. From the energy budget and the observed magnetic activity in the active region, we conclude that the free energy above the minimum-energy state gives a better estimate and more insights into the flare process than the free energy above the potential field state.

  9. Impact of sub-cell internal luminescence yields on energy conversion efficiencies of tandem solar cells: A design principle

    SciTech Connect (OSTI)

    Zhu, Lin, E-mail: zhulin@issp.u-tokyo.ac.jp; Kim, Changsu; Yoshita, Masahiro; Chen, Shaoqiang; Sato, Shintaroh; Mochizuki, Toshimitsu; Akiyama, Hidefumi, E-mail: golgo@issp.u-tokyo.ac.jp [Institute for Solid State Physics, University of Tokyo and JST-CREST, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan); Kanemitsu, Yoshihiko [Institute for Chemical Research, Kyoto University and JST-CREST, Uji, Kyoto 611-0011 (Japan)

    2014-01-20T23:59:59.000Z

    To develop a realistic design principle, we calculated the maximum conversion efficiency ?{sub sc} and optimized sub-cell band-gap energies E{sub g} in double-junction tandem solar cells via a detailed-balance theory, paying particular attention to their dependence on internal luminescence quantum yields y{sub int} of the top and bottom sub-cell materials. A strong drop in the maximum ?{sub sc} occurs when y{sub int} slightly drops from 1 to 0.9, where the drop in y{sub int} of the bottom cell causes a stronger effect than that of the top cell. For low values of y{sub int}, the maximum ?{sub sc} has a simple logarithmic dependence on the geometric mean of the two sub-cells'y{sub int}.

  10. Period-luminosity and period-luminosity-colour relations for Mira variables at maximum light

    E-Print Network [OSTI]

    S. M. Kanbur; M. A. Hendry; D. Clarke

    1997-04-14T23:59:59.000Z

    In this paper we confirm the existence of period-luminosity (PL) and period-luminosity-colour (PLC) relations at maximum light for O and C Mira variables in the LMC. We demonstrate that in the J and H bands the maximum light PL relations have a significantly smaller dispersion than their counterparts at mean light, while the K band and bolometric PL relations have a dispersion comparable to that at mean light. In the J, H and K bands the fitted PL relations for the O Miras are found to have smaller dispersion than those for the C Miras, at both mean and maximum light, while the converse is true for the relations based on bolometric magnitudes. The inclusion of a non-zero log period term is found to be highly significant in all cases except that of the C Miras in the J band, for which the data are found to be consistent with having constant absolute magnitude. This suggests the possibility of employing C Miras as standard candles. We suggest both a theoretical justification for the existence of Mira PL relations at maximum light and a possible explanation of why these relations should have a smaller dispersion than at mean light. The existence of such maximum light relations offers the possibility of extending the range and improving the accuracy of the Mira distance scale to Galactic globular clusters and to other galaxies.

  11. On the maximum value of the cosmic abundance of oxygen and the oxygen yield

    E-Print Network [OSTI]

    L. S. Pilyugin; T. X. Thuan; J. M. Vilchez

    2007-01-11T23:59:59.000Z

    We search for the maximum oxygen abundance in spiral galaxies. Because this maximum value is expected to occur in the centers of the most luminous galaxies, we have constructed the luminosity - central metallicity diagram for spiral galaxies, based on a large compilation of existing data on oxygen abundances of HII regions in spiral galaxies. We found that this diagram shows a plateau at high luminosities (-22.3 oxygen abundance 12+log(O/H) ~ 8.87. This provides strong evidence that the oxygen abundance in the centers of the most luminous metal-rich galaxies reaches the maximum attainable value of oxygen abundance. Since some fraction of the oxygen (about 0.08 dex) is expected to be locked into dust grains, the maximum value of the true gas+dust oxygen abundance in spiral galaxies is 12+log(O/H) ~ 8.95. This value is a factor of ~ 2 higher than the recently estimated solar value. Based on the derived maximum oxygen abundance in galaxies, we found the oxygen yield to be about 0.0035, depending on the fraction of oxygen incorporated into dust grains.

  12. Nighttime solar cell

    SciTech Connect (OSTI)

    Parise, R.J.

    1998-07-01T23:59:59.000Z

    Currently photovoltaic (PV) cells convert solar energy into electrical energy at an efficiency of about 18%, with the maximum conversion rate taking place around noon on a cloudless day. In many applications, the PV cells are utilized to recharge a stand-by battery pack that provides electrical energy at night or on cloudy days. Increasing the utilization of the panel array area by producing electrical power at night will reduce the amount of required electrical energy storage for a given array size and increase system reliability. Thermoelectric generators (TEG) are solid state devices that convert thermal energy into electrical energy. Using the nighttime sky, or deep space, with an effective temperature of 3.5 K as a cold sink, the TEG presented here can produce electrical power at night. The hot junction is supplied energy by the ambient air temperature or some other warm temperature source. The cold junction of the TEG is insulated from the surroundings by a vacuum cell, improving its overall effectiveness. Combining the TEG with the PV cell, a unique solid state device is developed that converts electromagnetic radiant energy into usable electrical energy. The thermoelectric-photovoltaic (TEPV) cell, or the Nighttime Solar Cell, is a direct energy conversion device that produces electrical energy both at night and during the day.

  13. LOW-TEMPERATURE, ANODE-SUPPORTED HIGH POWER DENSITY SOLID OXIDE FUEL CELLS WITH NANOSTRUCTURED ELECTRODES

    SciTech Connect (OSTI)

    Anil V. Virkar

    2002-03-26T23:59:59.000Z

    Anode-supported cells comprising Ni + yttria-stabilized zirconia (YSZ) anode, thin ({approx}10 {micro}m) YSZ electrolyte, and composite cathodes containing a mixture of La{sub 0.8}Sr{sub 0.2}MnO{sub (3-{delta})} (LSM) and La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub (3-{lambda})} (LSGM) were fabricated. The relative proportions of LSGM and LSM were varied between 30 wt.% LSGM + 70 wt.% LSM and 70 wt.% LSGM + 30 wt.% LSM, while the firing temperature was varied between 1000 and 1200 C. The cathode interlayer composition had a profound effect on cathode performance at 800 C with overpotentials ranging between 60 and 425 mV at 1.0 A/cm{sup 2} and exhibiting a minimum for 50 wt.% LSGM + 50 wt.% LSM. The cathodic overpotential decreased with increasing firing temperature of the composite interlayer in the range 1000 {le} T {le} 1150 C, and then increased dramatically for the interlayer fired at 1200 C. The cell with the optimized cathode interlayer of 50 wt.% LSM + 50 wt.% LSGM fired at 1150 C exhibited an area specific cell resistance of 0.18 {Omega}cm{sup 2} and a maximum power density of 1.4 W/cm{sup 2} at 800 C. Chemical analysis revealed that LSGM reacts with YSZ above 1000 C to form the pyrochlore phase, La{sub 2}Zr{sub 2}O{sub 7}. The formation of the pyrochlore phase at the interface between the LSGM/LSM composite cathode and the YSZ electrolyte limits the firing time and temperature of the cathode interlayer.

  14. 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

    2006-03-03T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Byrne, Raymond Harry; Silva Monroy, Cesar Augusto.

    2012-12-01T23:59:59.000Z

    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.

  16. What is the maximum rate at which entropy of a string can increase?

    SciTech Connect (OSTI)

    Ropotenko, Kostyantyn [State Administration of Communications, Ministry of Transport and Communications of Ukraine 22, Khreschatyk, 01001, Kyiv (Ukraine)

    2009-03-15T23:59:59.000Z

    According to Susskind, a string falling toward a black hole spreads exponentially over the stretched horizon due to repulsive interactions of the string bits. In this paper such a string is modeled as a self-avoiding walk and the string entropy is found. It is shown that the rate at which information/entropy contained in the string spreads is the maximum rate allowed by quantum theory. The maximum rate at which the black hole entropy can increase when a string falls into a black hole is also discussed.

  17. Hydrodynamic Relaxation of an Electron Plasma to a Near-Maximum Entropy State

    SciTech Connect (OSTI)

    Rodgers, D. J.; Servidio, S.; Matthaeus, W. H.; Mitchell, T. B.; Aziz, T. [Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States); Montgomery, D. C. [Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755 (United States)

    2009-06-19T23:59:59.000Z

    Dynamical relaxation of a pure electron plasma in a Malmberg-Penning trap is studied, comparing experiments, numerical simulations and statistical theories of weakly dissipative two-dimensional (2D) turbulence. Simulations confirm that the dynamics are approximated well by a 2D hydrodynamic model. Statistical analysis favors a theoretical picture of relaxation to a near-maximum entropy state with constrained energy, circulation, and angular momentum. This provides evidence that 2D electron fluid relaxation in a turbulent regime is governed by principles of maximum entropy.

  18. Maximum-Entropy Closures for Kinetic Theories of Neuronal Network Dynamics

    SciTech Connect (OSTI)

    Rangan, Aaditya V.; Cai, David [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States)

    2006-05-05T23:59:59.000Z

    We analyze (1+1)D kinetic equations for neuronal network dynamics, which are derived via an intuitive closure from a Boltzmann-like equation governing the evolution of a one-particle (i.e., one-neuron) probability density function. We demonstrate that this intuitive closure is a generalization of moment closures based on the maximum-entropy principle. By invoking maximum-entropy closures, we show how to systematically extend this kinetic theory to obtain higher-order (1+1)D kinetic equations and to include coupled networks of both excitatory and inhibitory neurons.

  19. Maximum Entropy Models of Shortest Path and Outbreak Distributions in Networks

    E-Print Network [OSTI]

    Bauckhage, Christian; Hadiji, Fabian

    2015-01-01T23:59:59.000Z

    Properties of networks are often characterized in terms of features such as node degree distributions, average path lengths, diameters, or clustering coefficients. Here, we study shortest path length distributions. On the one hand, average as well as maximum distances can be determined therefrom; on the other hand, they are closely related to the dynamics of network spreading processes. Because of the combinatorial nature of networks, we apply maximum entropy arguments to derive a general, physically plausible model. In particular, we establish the generalized Gamma distribution as a continuous characterization of shortest path length histograms of networks or arbitrary topology. Experimental evaluations corroborate our theoretical results.

  20. Solar coronal loops as non force-free minimum energy relaxed states

    SciTech Connect (OSTI)

    Kumar, Dinesh; Bhattacharyya, R. [Udaipur Solar Observatory, Physical Research Laboratory, Dewali, Bari Road, Udaipur 313 001 (India)

    2011-08-15T23:59:59.000Z

    In this work, the well established two-fluid relaxation model based on the minimum energy principle is extended to include open systems like the solar corona. The Euler-Lagrange equations obtained are of double curl in nature and support non-zero plasma-{beta} along with mass flow of the magnetofluid. These equations are solved in Cartesian coordinates utilizing a geometry relevant to the solar atmosphere, and a basic comparative study of the non force-free, force-free, and potential magnetic field obtained as solutions of the same Euler-Lagrange equations is presented.

  1. The secondary minimum in YY Her: Evidence for a tidally distorted giant

    E-Print Network [OSTI]

    J. Mikolajewska; E. A. Kolotilov; S. Yu. Shugarov; B. F. Yudin

    2002-06-23T23:59:59.000Z

    We present and analyze quiescent UBVRI light curves of the classical symbiotic binary YY Her. We show that the secondary minimum, which is clearly visible only in the quiescent VRI light curves, is due to ellipsoidal variability of the red giant component. Our simple light curve analysis, by fitting of the Fourier cosine series, resulted in a self-consistent phenomenological model of YY Her, in which the periodic changes can be described by a combination of the ellipsoidal changes and a sinusoidal changes of the nebular continuum and line emission.

  2. A Mandated Minimum Competency Testing Program and Its Impact on Learning Disabled Students: Curricular Validity and Comparative Performances

    E-Print Network [OSTI]

    Meyen, Edward L.; Alley, Gordon R.; Scannell, Dale P.; Harnden, G. Mack; Miller, Kelly F.

    1982-06-01T23:59:59.000Z

    In this study, LD specialists, regular class teachers, and parents of LD students judged that the objectives of the Kansas Minimum Competency Specifications prescribed for nonhandicapped students were applicable to LD ...

  3. Determining Reserves in Low Permeability and Layered Reservoirs Using the Minimum Terminal Decline Rate Method: How Good are the Predictions? 

    E-Print Network [OSTI]

    McMillan, Marcia Donna

    2011-08-08T23:59:59.000Z

    Shale completions of the type which have been widely utilized since 2004. There is insufficient production history from real wells to determine an appropriate minimum terminal decline rate. In the absence of suitable analogs for the determination...

  4. The effect of sand grain size distribution on the minimum oil saturation necessary to support in-situ combustion

    E-Print Network [OSTI]

    Daniel, William Marvin

    1973-01-01T23:59:59.000Z

    THE EFFECT OF SAND GRAIN SIZE DISTRIBUTION ON THE MINIMUM OIL SATURATION NECESSARY TO SUPPORT IN-SITU COMBUSTION A Thesis by WILLIAM MARVIN DANIEL Submitted to the Graduate College of Texas ARM University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE May 1973 Major Subject: Petroleum. Engineering THE EFFECT OF SAND GRAIN SIZE DISTRIBUTION ON THE MINIMUM OIL SATURATION NECESSARY TO SUPPORT IN-SITU COMBUSTION A Thesis by WILLIAM MARVIN DANIEL Approved...

  5. Minimum separation distances for natural gas pipeline and boilers in the 300 area, Hanford Site

    SciTech Connect (OSTI)

    Daling, P.M.; Graham, T.M.

    1997-08-01T23:59:59.000Z

    The U.S. Department of Energy (DOE) is proposing actions to reduce energy expenditures and improve energy system reliability at the 300 Area of the Hanford Site. These actions include replacing the centralized heating system with heating units for individual buildings or groups of buildings, constructing a new natural gas distribution system to provide a fuel source for many of these units, and constructing a central control building to operate and maintain the system. The individual heating units will include steam boilers that are to be housed in individual annex buildings located at some distance away from nearby 300 Area nuclear facilities. This analysis develops the basis for siting the package boilers and natural gas distribution systems to be used to supply steam to 300 Area nuclear facilities. The effects of four potential fire and explosion scenarios involving the boiler and natural gas pipeline were quantified to determine minimum separation distances that would reduce the risks to nearby nuclear facilities. The resulting minimum separation distances are shown in Table ES.1.

  6. Apparatus and method for closed-loop control of reactor power in minimum time

    DOE Patents [OSTI]

    Bernard, Jr., John A. (72 Paul Revere Rd., Needham Heights, MA 02194)

    1988-11-01T23:59:59.000Z

    Closed-loop control law for altering the power level of nuclear reactors in a safe manner and without overshoot and in minimum time. Apparatus is provided for moving a fast-acting control element such as a control rod or a control drum for altering the nuclear reactor power level. A computer computes at short time intervals either the function: .rho.=(.beta.-.rho.).omega.-.lambda..sub.e '.rho.-.SIGMA..beta..sub.i (.lambda..sub.i -.lambda..sub.e ')+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e '.omega.] or the function: .rho.=(.beta.-.rho.).omega.-.lambda..sub.e .rho.-(.lambda..sub.e /.lambda..sub.e)(.beta.-.rho.)+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e .omega.-(.lambda..sub.e /.lambda..sub.e).omega.] These functions each specify the rate of change of reactivity that is necessary to achieve a specified rate of change of reactor power. The direction and speed of motion of the control element is altered so as to provide the rate of reactivity change calculated using either or both of these functions thereby resulting in the attainment of a new power level without overshoot and in minimum time. These functions are computed at intervals of approximately 0.01-1.0 seconds depending on the specific application.

  7. 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

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

    E-Print Network [OSTI]

    Odam, Kofi

    , Charles R. Sullivan, Senior Member, IEEE Abstract--This paper analyzes the effect of noise on sev- eral maximum power point tracking (MPPT) algorithms for photovoltaic systems. Noise is an essential of the signals, mitigating the noise. The effect of noise and other parameters on tracking performance

  9. Maximum Output Amplitude of Linear Systems for certain Input Constraints1

    E-Print Network [OSTI]

    Sontag, Eduardo

    of this input and calculates the maximum amplitude of the output. The solution of this problem is a necessary, Linear Sys- tems. 1 Introduction and Motivation Most practical control problems are dominated by hard bounds. Valves can only be operated between fully open and fully closed, pumps and compressors have

  10. Blind Equalization via Approximate Maximum Likelihood Source Seungjin CHOI x1 and Andrzej CICHOCKI y

    E-Print Network [OSTI]

    Choi, Seungjin

    Blind Equalization via Approximate Maximum Likelihood Source Separation Seungjin CHOI x1, RIKEN 2-1 Hirosawa, Wako-shi Saitama 351-0198, JAPAN Abstract Blind equalization of single input multiple output (SIMO) FIR channels can be refor- mulated as the problem of blind source separation

  11. Photothermoacoustic imaging of biological tissues: maximum depth characterization comparison of time and

    E-Print Network [OSTI]

    Mandelis, Andreas

    Photothermoacoustic imaging of biological tissues: maximum depth characterization comparison for Advanced Diffusion-Wave Technologies Department of Mechanical and Industrial Engineering 5 King's College induced in light-absorbing materials can be observed either as a transient signal in time domain

  12. 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

  13. Maximum principle and bang-bang property of time optimal controls for Schrodinger type systems

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Maximum principle and bang-bang property of time optimal controls for Schr¨odinger type systems J conditions for the bang- bang property of optimal controls. The results are then applied to some systems-Bang property, Schr¨odinger equation 1 Introduction Time optimal control is a classical problem for linear

  14. 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

  15. Maximum-Power-Point Tracking Method of Photovoltaic Power System Using Single Transducer

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    Maximum-Power-Point Tracking Method of Photovoltaic Power System Using Single Transducer Toshihiko) method of a photovoltaic power system with less transducer count. A unique feature of this method concern on an environmental issue since 1990's. Above all, a photovoltaic power generation system is one

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

    E-Print Network [OSTI]

    Kusiak, Andrew

    Design 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 Optimization Evolutionary algorithms Operations research a b s t r a c t Wind is one of the most promising

  17. Electrical Estimation of Conditional Probability for Maximum-likelihood Based PMD Mitigation

    E-Print Network [OSTI]

    Zweck, John

    Xi, T¨ulay Adali, and John Zweck Department of Computer Science and Electrical Engineering UniversityElectrical Estimation of Conditional Probability for Maximum-likelihood Based PMD Mitigation Wenze probability density functions in the presence of both all-order PMD and ASE noise are estimated electronically

  18. Brayton Cycles: From the ...rst law, the maximum transfers for component SSSF control volumes are

    E-Print Network [OSTI]

    . For the simple reversible Brayton cycle of given pressure ratio rp $ (p2=p1) = (p3=p4) [compare Example 9.4, pp is higher than 1 r (2=7) . For the ideal regenerator, the thermal e¢ ciency approaches the Carnot-cycle eBrayton Cycles: From the ...rst law, the maximum transfers for component SSSF control volumes are w

  19. Maximum Likelihood Estimation of Mixture Densities for Binned and Truncated Multivariate

    E-Print Network [OSTI]

    Smyth, Padhraic

    Maximum Likelihood Estimation of Mixture Densities for Binned and Truncated Multivariate Data in data analysis and machine learning. This paper addresses the problem of fitting mixture densities to multivariate binned and truncated data. The EM approach proposed by McLachlan and Jones (1988

  20. EXTENSION OF THE MAXIMUM POWER REGION OF DOUBLY-SALIENT VARIABLE RELUCTANCE MOTORS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -Salient Variable Reluctance Motors (DSVRM) has been investigated and developed for variable-speed drives during, variable-frequency generators, wind wheels, machine tools, etc.). In these applications, it is generally necessary to operate in a regime of a high speed ux-weakening (zone of maximum constant power), for a better

  1. Hydrogen Molecules inside Fullerene C70: Quantum Dynamics, Energetics, Maximum Occupancy, And Comparison with C60

    E-Print Network [OSTI]

    Turro, Nicholas J.

    Hydrogen Molecules inside Fullerene C70: Quantum Dynamics, Energetics, Maximum Occupancy of Chemistry, New York UniVersity, New York, New York 10003, Department of Chemistry, Brown UniVersity, ProVidence, Rhode Island 02912, and Department of Chemistry, Columbia UniVersity, New York, New York 10027 Received

  2. Vision Research 40 (2000) 11571165 Local luminance factors that determine the maximum disparity for

    E-Print Network [OSTI]

    Kingdom, Frederick A. A.

    2000-01-01T23:59:59.000Z

    Vision Research 40 (2000) 1157­1165 Local luminance factors that determine the maximum disparity dense arrays of micropatterns, whose luminance characteristics were manipulated. In Experiment 1, we with luminance spatial frequency and with Gabor size, but was constant for a constant bandwidth (frequency times

  3. Exact Maximum Likelihood estimator for the BL-GARCH model under elliptical distributed

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Exact Maximum Likelihood estimator for the BL-GARCH model under elliptical distributed innovations, Brisbane QLD 4001, Australia Abstract We are interested in the parametric class of Bilinear GARCH (BL-GARCH examine, in this paper, the BL-GARCH model in a general setting under some non-normal distributions. We

  4. Learning with MaximumEntropy Distributions \\Lambda Yishay Mansour Mariano Schain

    E-Print Network [OSTI]

    Mansour, Yishay

    Learning with Maximum­Entropy Distributions \\Lambda Yishay Mansour Mariano Schain Computer Science Dept. Tel­Aviv University fmansour,marianog@math.tau.ac.il Abstract We are interested in distributions which are de­ rived as a maximumentropy distribution given a set of constraints. More specifically, we

  5. A Global Maximum Power Point Tracking Method for PV Module Integrated Converters

    E-Print Network [OSTI]

    Liberzon, Daniel

    with large arrays of series-connected PV mod- ules connected to a central inverter. Figure 1(a) depicts, it is conceivable that these systems do not extract the maximum possible power from the PV array when individual PV to partial shading. In such systems, power electronics circuits are integrated directly with PV modules

  6. Department of Mechanical Engineering Spring 2013 Maximum Allowable Gasket Seating Surface Degradation

    E-Print Network [OSTI]

    Demirel, Melik C.

    Degradation Overview Westinghouse applies a conservative approach when evaluating degradation on a gasket evaluation. The team was tasked with collecting this data to determine when degradation endangers the pressure seal. Objectives The team's objectives were to determine the maximum degradation which the gasket

  7. Benefits of the International Residential Code's Maximum Solar heat Gain Coefficient Requirement for Windows

    E-Print Network [OSTI]

    Stone, G. A.; DeVito, E. M.; Nease, N. H.

    2002-01-01T23:59:59.000Z

    Texas adopted in its residential building energy code a maximum 0.40 solar heat gain coefficient (SHGC) for fenestration (e.g., windows, glazed doors and skylights)-a critical driver of cooling energy use, comfort and peak demand. An analysis...

  8. Bayesian Data and Channel Joint Maximum-Likelihood Based Error Correction in Wireless Sensor Networks

    E-Print Network [OSTI]

    Jagannatham, Aditya K.

    in wireless sensor networks (WSN). The proposed algo- rithm employs the temporal correlation of the narrowband Wireless Sensor Network (WSN), Likelihood, Sphere De- coder 1. INTRODUCTION Wireless Sensor Networks (WSNBayesian Data and Channel Joint Maximum-Likelihood Based Error Correction in Wireless Sensor

  9. Maximum-Lifetime Multi-Channel Routing in Wireless Sensor Networks

    E-Print Network [OSTI]

    Nasipuri, Asis

    Maximum-Lifetime Multi-Channel Routing in Wireless Sensor Networks Amitangshu Pal and Asis Nasipuri and routing problem in multi-channel wireless sensor networks for maximizing the worst case network lifetime solution for the problem. Keywords: Wireless sensor networks, multi-channel rout- ing, distributed

  10. The chronology of the Last Glacial Maximum and deglacial events in central Argentine Patagonia

    E-Print Network [OSTI]

    The chronology of the Last Glacial Maximum and deglacial events in central Argentine Patagonia and deglaciation in the Lago Pueyrredo´n valley of central Patagonia, 47.5 S, Argentina. The valley was a major and the onset of deglaciation occurred broadly synchronously throughout Patagonia. Deglaciation resulted

  11. Single-machine scheduling with periodic and exible periodic maintenance to minimize maximum tardiness

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    periods often appear in industry due to a machine breakdown (stochastic) or preventive maintenance of machine unavailability. However, in some cases (e.g. preventive maintenance), the maintenance of a machineSingle-machine scheduling with periodic and exible periodic maintenance to minimize maximum

  12. THE SECOND LAW OF THERMODYNAMICS AND THE GLOBAL CLIMATE SYSTEM: A REVIEW OF THE MAXIMUM

    E-Print Network [OSTI]

    Lorenz, Ralph D.

    to absorption of solar radiation in the climate system is found to be irrelevant to the maximized prop- erties from hot to cold places, thereby producing the kinetic energy of the fluid itself. His generalTHE SECOND LAW OF THERMODYNAMICS AND THE GLOBAL CLIMATE SYSTEM: A REVIEW OF THE MAXIMUM ENTROPY

  13. 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

  14. 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

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

    E-Print Network [OSTI]

    Lindenberg, Katja

    2012-01-01T23:59:59.000Z

    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

  16. Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture

    E-Print Network [OSTI]

    Katul, Gabriel

    Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture Stefano Accepted 26 September 2013 Available online 9 October 2013 Keywords: Optimization Photosynthesis Soil moisture Stomatal conductance Transpiration a b s t r a c t Optimization theories explain a variety

  17. A Distributed Approach to Maximum Power Point Tracking for Photovoltaic Sub-Module Differential

    E-Print Network [OSTI]

    Liberzon, Daniel

    of the proposed distributed algorithm. I. INTRODUCTION IN photovoltaic (PV) energy systems, PV modules are often of the system, small size and low power ratings of the power electronics circuit components. Due1 A Distributed Approach to Maximum Power Point Tracking for Photovoltaic Sub-Module Differential

  18. 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

  19. 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

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

    E-Print Network [OSTI]

    Dominik Nickel

    2006-07-20T23:59:59.000Z

    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.

  1. Parameters estimation for spatio-temporal maximum entropy distributions: application to neural spike trains

    E-Print Network [OSTI]

    Nasser, Hassan

    2014-01-01T23:59:59.000Z

    We propose a numerical method to learn Maximum Entropy (MaxEnt) distributions with spatio-temporal constraints from experimental spike trains. This is an extension of two papers [10] and [4] who proposed the estimation of parameters where only spatial constraints were taken into account. The extension we propose allows to properly handle memory effects in spike statistics, for large sized neural networks.

  2. Beyond Boltzmann-Gibbs statistics: Maximum entropy hyperensembles out of equilibrium Gavin E. Crooks*

    E-Print Network [OSTI]

    Beyond Boltzmann-Gibbs statistics: Maximum entropy hyperensembles out of equilibrium Gavin E at equilibrium? Here, we argue the most appropriate additional parameter is the nonequilibrium entropy of ways that the same system can be out of equilibrium. That the equilibrium entropy is maximized given

  3. Extraction of spectral functions from Dyson-Schwinger studies via the maximum entropy method

    SciTech Connect (OSTI)

    Nickel, Dominik [Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)]. E-mail: dominik.nickel@physik.tu-darmstadt.de

    2007-08-15T23:59:59.000Z

    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.

  4. Lattice Field Theory with the Sign Problem and the Maximum Entropy Method

    E-Print Network [OSTI]

    Masahiro Imachi; Yasuhiko Shinno; Hiroshi Yoneyama

    2007-02-09T23:59:59.000Z

    Although numerical simulation in lattice field theory is one of the most effective tools to study non-perturbative properties of field theories, it faces serious obstacles coming from the sign problem in some theories such as finite density QCD and lattice field theory with the $\\theta$ term. We reconsider this problem from the point of view of the maximum entropy method.

  5. 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

  6. SALTSTONE DISPOSAL FACILITY: DETERMINATION OF THE PROBABLE MAXIMUM WATER TABLE ELEVATION

    SciTech Connect (OSTI)

    Hiergesell, R

    2005-04-01T23:59:59.000Z

    A coverage depicting the configuration of the probable maximum water table elevation in the vicinity of the Saltstone Disposal Facility (SDF) was developed to support the Saltstone program. This coverage is needed to support the construction of saltstone vaults to assure that they remain above the maximum elevation of the water table during the Performance Assessment (PA) period of compliance. A previous investigation to calculate the historical high water table beneath the SDF (Cook, 1983) was built upon to incorporate new data that has since become available to refine that estimate and develop a coverage that could be extended to the perennial streams adjacent to the SDF. This investigation incorporated the method used in the Cook, 1983 report to develop an estimate of the probable maximum water table for a group of wells that either existed at one time at or near the SDF or which currently exist. Estimates of the probable maximum water table at these wells were used to construct 2D contour lines depicting this surface beneath the SDF and extend them to the nearby hydrologic boundaries at the perennial streams adjacent to the SDF. Although certain measures were implemented to assure that the contour lines depict a surface above which the water table will not rise, the exact elevation of this surface cannot be known with complete certainty. It is therefore recommended that the construction of saltstone vaults incorporate a vertical buffer of at least 5-feet between the base of the vaults and the depicted probable maximum water table elevation. This should provide assurance that the water table under the wet extreme climatic condition will never rise to intercept the base of a vault.

  7. Analysis of Minimum Efficiency Performance Standards for Residential General Service Lighting in Chile

    SciTech Connect (OSTI)

    Letschert, Virginie E.; McNeil, Michael A.; Leiva Ibanez, Francisco Humberto; Ruiz, Ana Maria; Pavon, Mariana; Hall, Stephen

    2011-06-01T23:59:59.000Z

    Minimum Efficiency Performance Standards (MEPS) have been chosen as part of Chile's national energy efficiency action plan. As a first MEPS, the Ministry of Energy has decided to focus on a regulation for lighting that would ban the sale of inefficient bulbs, effectively phasing out the use of incandescent lamps. Following major economies such as the US (EISA, 2007) , the EU (Ecodesign, 2009) and Australia (AS/NZS, 2008) who planned a phase out based on minimum efficacy requirements, the Ministry of Energy has undertaken the impact analysis of a MEPS on the residential lighting sector. Fundacion Chile (FC) and Lawrence Berkeley National Laboratory (LBNL) collaborated with the Ministry of Energy and the National Energy Efficiency Program (Programa Pais de Eficiencia Energetica, or PPEE) in order to produce a techno-economic analysis of this future policy measure. LBNL has developed for CLASP (CLASP, 2007) a spreadsheet tool called the Policy Analysis Modeling System (PAMS) that allows for evaluation of costs and benefits at the consumer level but also a wide range of impacts at the national level, such as energy savings, net present value of savings, greenhouse gas (CO2) emission reductions and avoided capacity generation due to a specific policy. Because historically Chile has followed European schemes in energy efficiency programs (test procedures, labelling program definitions), we take the Ecodesign commission regulation No 244/2009 as a starting point when defining our phase out program, which means a tiered phase out based on minimum efficacy per lumen category. The following data were collected in order to perform the techno-economic analysis: (1) Retail prices, efficiency and wattage category in the current market, (2) Usage data (hours of lamp use per day), and (3) Stock data, penetration of efficient lamps in the market. Using these data, PAMS calculates the costs and benefits of efficiency standards from two distinct but related perspectives: (1) The Life-Cycle Cost (LCC) calculation examines costs and benefits from the perspective of the individual household; and (2) The National Perspective projects the total national costs and benefits including both financial benefits, and energy savings and environmental benefits. The national perspective calculations are called the National Energy Savings (NES) and the Net Present Value (NPV) calculations. PAMS also calculate total emission mitigation and avoided generation capacity. This paper describes the data and methodology used in PAMS and presents the results of the proposed phase out of incandescent bulbs in Chile.

  8. On Minimum-Collisions Assignment in Heterogeneous Self-Organizing Networks

    E-Print Network [OSTI]

    Boyer, Edmond

    , is the distribution of a finite resource set, such that the number of neighbor cells which receive common elements among cells and scheduling time slots of a finite duration frame over a set of collocated links that the algorithm converges to a optimal pure strategy Nash equilibrium in finite time and it is robust to node

  9. Three-Electrode Metal Oxide Reduction Cell

    DOE Patents [OSTI]

    Dees, Dennis W. (Downers Grove, IL); Ackerman, John P. (Downers Grove, IL)

    2005-06-28T23:59:59.000Z

    A method of electrochemically reducing a metal oxide to the metal in an electrochemical cell is disclosed along with the cell. Each of the anode and cathode operate at their respective maximum reaction rates. An electrolyte and an anode at which oxygen can be evolved, and a cathode including a metal oxide to be reduced are included as is a third electrode with independent power supplies connecting the anode and the third electrode and the cathode and the third electrode.

  10. Three-electrode metal oxide reduction cell

    DOE Patents [OSTI]

    Dees, Dennis W. (Downers Groves, IL); Ackerman, John P. (Downers Grove, IL)

    2008-08-12T23:59:59.000Z

    A method of electrochemically reducing a metal oxide to the metal in an electrochemical cell is disclosed along with the cell. Each of the anode and cathode operate at their respective maximum reaction rates. An electrolyte and an anode at which oxygen can be evolved, and a cathode including a metal oxide to be reduced are included as is a third electrode with independent power supplies connecting the anode and the third electrode and the cathode and the third electrode.

  11. The effects of R/X ratios on power system minimum loss

    E-Print Network [OSTI]

    Denison, John Scott

    1949-01-01T23:59:59.000Z

    . 8 ]0 19 ' B+]40?5 Approx. 1/2 X17 Angle (degrees) I R TOTAL I X I Z I R IX IZ PZR CZ, NT LOSS ' 2?5 5 ' 0 -7 ' 5 -10 -15 2. 88 5 43 2 ' 09 2. 00 2. 54 3 ' 43 6. 69 0 ' 91 2 ~ 51 O. o3 0. 97 1. 96 3 ' 17 7 ?14 2 ~ 98 5. 99... 2. 18 2?22 3 ' 20 4. 67 9. 76 148. 0 278. 0 107. 1 103. 0 130 5 176. 0 343 ' o 144?4 139. 0 398 ' 0 278. 5 700, 5 101. 3 154 ' 0 103 ' 2 311 ~ 5 14. 9 ~ 0 504?0 216?5 1033. 0 455. 0 kt minimum point, ths system I R loss is 7. 3...

  12. On the minimum dark matter mass testable by neutrinos from the Sun

    SciTech Connect (OSTI)

    Busoni, Giorgio; Simone, Andrea De; Huang, Wei-Chih, E-mail: giorgio.busoni@sissa.it, E-mail: andrea.desimone@sissa.it, E-mail: wei-chih.huang@sissa.it [SISSA and INFN, Sezione di Trieste, via Bonomea 265, I-34136 Trieste (Italy)

    2013-07-01T23:59:59.000Z

    We discuss a limitation on extracting bounds on the scattering cross section of dark matter with nucleons, using neutrinos from the Sun. If the dark matter particle is sufficiently light (less than about 4 GeV), the effect of evaporation is not negligible and the capture process goes in equilibrium with the evaporation. In this regime, the flux of solar neutrinos of dark matter origin becomes independent of the scattering cross section and therefore no constraint can be placed on it. We find the minimum values of dark matter masses for which the scattering cross section on nucleons can be probed using neutrinos from the Sun. We also provide simple and accurate fitting functions for all the relevant processes of GeV-scale dark matter in the Sun.

  13. Possible Observation of Nuclear Reactor Neutrinos Near the Oscillation Absolute Minimum

    E-Print Network [OSTI]

    C. Bouchiat

    2003-04-27T23:59:59.000Z

    After a summary of the basic three neutrino oscillation formalism we review briefly our present empirical knowledge of the oscillation parameters and conclude that the 2-neutrinos model is adequate to describe the survival probability of the electronic neutrino P(nue->nue). Then we proceed to the evaluation of P(nue->nue) relative to the antineutrinos emitted by the nuclear power stations presently in operation along the the Rhone valley. We assume that a detector has been installed in a existing cavity located under the Mont Ventoux at a depth equivalent to 1500 m of water. We show that such an experiment would provide the opportunity to observe neutrinos near the oscillation absolute minimum. We end by a rough estimate of the counting rate.

  14. Three dimensional winds: A maximum cross-correlation application to elastic lidar data

    SciTech Connect (OSTI)

    Buttler, W.T.

    1996-05-01T23:59:59.000Z

    Maximum cross-correlation techniques have been used with satellite data to estimate winds and sea surface velocities for several years. Los Alamos National Laboratory (LANL) is currently using a variation of the basic maximum cross-correlation technique, coupled with a deterministic application of a vector median filter, to measure transverse winds as a function of range and altitude from incoherent elastic backscatter lidar (light detection and ranging) data taken throughout large volumes within the atmospheric boundary layer. Hourly representations of three-dimensional wind fields, derived from elastic lidar data taken during an air-quality study performed in a region of complex terrain near Sunland Park, New Mexico, are presented and compared with results from an Environmental Protection Agency (EPA) approved laser doppler velocimeter. The wind fields showed persistent large scale eddies as well as general terrain-following winds in the Rio Grande valley.

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

    SciTech Connect (OSTI)

    Sullivan, Terry [Brookhaven National Lab. (BNL), Upton, NY (United States). Biological, Environmental, and Climate Sciences Dept.

    2014-12-02T23:59:59.000Z

    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.

  16. How multiplicity determines entropy and the derivation of the maximum entropy principle for complex systems

    E-Print Network [OSTI]

    Hanel, Rudolf; Gell-Mann, Murray

    2014-01-01T23:59:59.000Z

    The maximum entropy principle (MEP) is a method for obtaining the most likely distribution functions of observables from statistical systems, by maximizing entropy under constraints. The MEP has found hundreds of applications in ergodic and Markovian systems in statistical mechanics, information theory, and statistics. For several decades there exists an ongoing controversy whether the notion of the maximum entropy principle can be extended in a meaningful way to non-extensive, non-ergodic, and complex statistical systems and processes. In this paper we start by reviewing how Boltzmann-Gibbs-Shannon entropy is related to multiplicities of independent random processes. We then show how the relaxation of independence naturally leads to the most general entropies that are compatible with the first three Shannon-Khinchin axioms, the (c,d)-entropies. We demonstrate that the MEP is a perfectly consistent concept for non-ergodic and complex statistical systems if their relative entropy can be factored into a general...

  17. Exact computation of the Maximum Entropy Potential of spiking neural networks models

    E-Print Network [OSTI]

    Cofre, Rodrigo

    2014-01-01T23:59:59.000Z

    Understanding how stimuli and synaptic connectivity in uence the statistics of spike patterns in neural networks is a central question in computational neuroscience. Maximum Entropy approach has been successfully used to characterize the statistical response of simultaneously recorded spiking neurons responding to stimuli. But, in spite of good performance in terms of prediction, the ?tting parameters do not explain the underlying mechanistic causes of the observed correlations. On the other hand, mathematical models of spiking neurons (neuro-mimetic models) provide a probabilistic mapping between stimulus, network architecture and spike patterns in terms of conditional proba- bilities. In this paper we build an exact analytical mapping between neuro-mimetic and Maximum Entropy models.

  18. Maximum-entropy principle for static and dynamic high-field transport in semiconductors

    SciTech Connect (OSTI)

    Trovato, M. [Dipartimento di Matematica, Universita di Catania, Viale A. Doria, 95125 Catania (Italy); Reggiani, L. [Dipartimento di Ingegneria dell' Innovazione e Nanotechnology National Laboratory of CNR-INFM, Universita di Lecce, Via Arnesano s/n, 73100 Lecce (Italy)

    2006-06-15T23:59:59.000Z

    Within the maximum entropy principle we present a general theory able to provide, in a dynamical context, the macroscopic relevant variables for carrier transport under electric fields of arbitrary strength. For the macroscopic variables the linearized maximum entropy approach is developed including full-band effects within a total energy scheme. Under spatially homogeneous conditions, we construct a closed set of hydrodynamic equations for the small-signal (dynamic) response of the macroscopic variables. The coupling between the driving field and the energy dissipation is analyzed quantitatively by using an arbitrary number of moments of the distribution function. The theoretical approach is applied to n-Si at 300 K and is validated by comparing numerical calculations with ensemble Monte Carlo simulations and with experimental data.

  19. Fuel Cells

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

    Fuel Cells Converting chemical energy of hydrogenated fuels into electricity Project Description Invented in 1839, fuels cells powered the Gemini and Apollo space missions, as well...

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

    SciTech Connect (OSTI)

    Barletti, Luigi, E-mail: luigi.barletti@unifi.it [Dipartimento di Matematica e Informatica “Ulisse Dini”, Università degli Studi di Firenze, Viale Morgagni 67/A, 50134 Firenze (Italy)

    2014-08-15T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    UMEDA, T.; MATSUFURU, H.

    2005-07-25T23:59:59.000Z

    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.

  2. Towards the application of the Maximum Entropy Method to finite temperature Upsilon Spectroscopy

    E-Print Network [OSTI]

    M. Oevers; C. Davies; J. Shigemitsu

    2000-09-22T23:59:59.000Z

    According to the Narnhofer Thirring Theorem interacting systems at finite temperature cannot be described by particles with a sharp dispersion law. It is therefore mandatory to develop new methods to extract particle masses at finite temperature. The Maximum Entropy method offers a path to obtain the spectral function of a particle correlation function directly. We have implemented the method and tested it with zero temperature Upsilon correlation functions obtained from an NRQCD simulation. Results for different smearing functions are discussed.

  3. Maximum entropy deconvolution of resonant inelastic x-ray scattering spectra

    E-Print Network [OSTI]

    J. Laverock; A. R. H. Preston; D. Newby Jr; K. E. Smith; S. B. Dugdale

    2012-02-10T23:59:59.000Z

    Resonant inelastic x-ray scattering (RIXS) has become a powerful tool in the study of the electronic structure of condensed matter. Although the linewidths of many RIXS features are narrow, the experimental broadening can often hamper the identification of spectral features. Here, we show that the Maximum Entropy technique can successfully be applied in the deconvolution of RIXS spectra, improving the interpretation of the loss features without a severe increase in the noise ratio.

  4. Remarks on the Maximum Entropy Method applied to finite temperature lattice QCD

    E-Print Network [OSTI]

    Takashi Umeda; Hideo Matsufuru

    2005-10-05T23:59:59.000Z

    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.

  5. Where and how long ago was water in the western North Atlantic ventilated? Maximum entropy inversions of bottle data from WOCE line A20

    E-Print Network [OSTI]

    Holzer, Mark; Primeau, Francois W; Smethie, William M; Khatiwala, Samar

    2010-01-01T23:59:59.000Z

    Gull (1991), Bayesian maximum entropy image reconstruction,F. Primeau (2006), A maximum entropy approach to water massSouth- ern Ocean? A maximum entropy approach to global water

  6. Maximum Neutral Buoyancy Depth of Juvenile Chinook Salmon: Implications for Survival during Hydroturbine Passage

    SciTech Connect (OSTI)

    Pflugrath, Brett D.; Brown, Richard S.; Carlson, Thomas J.

    2012-03-01T23:59:59.000Z

    This study investigated the maximum depth at which juvenile Chinook salmon Oncorhynchus tshawytscha can acclimate by attaining neutral buoyancy. Depth of neutral buoyancy is dependent upon the volume of gas within the swim bladder, which greatly influences the occurrence of injuries to fish passing through hydroturbines. We used two methods to obtain maximum swim bladder volumes that were transformed into depth estimations - the increased excess mass test (IEMT) and the swim bladder rupture test (SBRT). In the IEMT, weights were surgically added to the fishes exterior, requiring the fish to increase swim bladder volume in order to remain neutrally buoyant. SBRT entailed removing and artificially increasing swim bladder volume through decompression. From these tests, we estimate the maximum acclimation depth for juvenile Chinook salmon is a median of 6.7m (range = 4.6-11.6 m). These findings have important implications to survival estimates, studies using tags, hydropower operations, and survival of juvenile salmon that pass through large Kaplan turbines typical of those found within the Columbia and Snake River hydropower system.

  7. Cell Stem Cell Clinical Progress

    E-Print Network [OSTI]

    Zandstra, Peter W.

    Cell Stem Cell Clinical Progress Rapid Expansion of Human Hematopoietic Stem Cells by Automated of Toronto, Toronto, ON M5G 1L7, Canada 6McEwen Centre for Regenerative Medicine, University Health Network

  8. Vaidya Solution in General Covariant Ho?ava-Lifshitz Gravity with the Minimum Coupling and without Projectability: Infrared Limit

    E-Print Network [OSTI]

    O. Goldoni; M. F. A. da Silva; R. Chan; G. Pinheiro

    2014-12-16T23:59:59.000Z

    In this paper, we have studied nonstationary radiative spherically symmetric spacetime, in general covariant theory ($U(1)$ extension) of {the} Ho\\v{r}ava-Lifshitz gravity with the minimum coupling, in the post-newtonian approximation (PPN), without the projectability condition and in the infrared limit. The Newtonian prepotential $\\varphi$ was assumed null. We have shown that there is not the analogue of the Vaidya's solution in the Ho\\v{r}ava-Lifshitz Theory (HLT) with the minimum coupling, as we know in the General Relativity Theory (GRT).

  9. Increased performance of single-chamber microbial fuel cells using an improved cathode structure

    E-Print Network [OSTI]

    Increased performance of single-chamber microbial fuel cells using an improved cathode structure Maximum power densities by air-driven microbial fuel cells (MFCs) are considerably influenced by cathode reserved. Keywords: Microbial fuel cell; Air cathode; Diffusion layer; PTFE coating; Coulombic efficiency 1

  10. The Bachelor of Management degree in International Management is a minimum of 40 courses in length. Admission to the Faculty may occur at the end of Year One. Students are required to have completed the following courses, with a minimum

    E-Print Network [OSTI]

    Seldin, Jonathan P.

    - Canadian and International Environmental Management Management 4640 - Cross-Cultural Work Study FourThe Bachelor of Management degree in International Management is a minimum of 40 courses in length in Year One. Admission to Management programs is competitive and is based on academic achievement prior

  11. Blind Joint Maximum Likelihood Channel Estimation and Data Detection for Single-Input Multiple-Output Systems

    E-Print Network [OSTI]

    Chen, Sheng

    Blind Joint Maximum Likelihood Channel Estimation and Data Detection for Single-Input Multiple of Southampton, Southampton SO17 1BJ, U.K. Abstract--A blind adaptive scheme is proposed for joint maximum. A simulation example is used to demon- strate the effectiveness of this joint ML optimization scheme for blind

  12. On Maximum Available Feedback and PID Control -1 IEEE SMC UK&RI Applied Cybernetics Dr Richard Mitchell 2005

    E-Print Network [OSTI]

    Mitchell, Richard

    On Maximum Available Feedback and PID Control - 1 IEEE SMC UK&RI Applied Cybernetics © Dr Richard Mitchell 2005 ON MAXIMUM AVAILABLE FEEDBACK AND PID CONTROL Dr Richard Mitchell, Cybernetics, University frequencies A recent IEEE SMC Paper describes a robust PID controller whose phase is flat at key frequencies

  13. Abstract--The many different techniques for maximum power point tracking of photovoltaic arrays are discussed. The

    E-Print Network [OSTI]

    Chapman, Patrick

    Abstract--The many different techniques for maximum power point tracking of photovoltaic arrays on implementation. This manuscript should serve as a convenient reference for future work in photovoltaic power generation. Index Terms--maximum power point tracking, MPPT, photovoltaic, PV. I. INTRODUCTION RACKING

  14. 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)

    2014-12-01T23:59:59.000Z

    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.

  15. 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,

    2014-09-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    2012-02-18T23:59:59.000Z

    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.

  17. On Weyl channels being covariant with respect to the maximum commutative group of unitaries

    E-Print Network [OSTI]

    G. G. Amosov

    2006-08-10T23:59:59.000Z

    We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the "two-Pauli" channel as well. Then, we show that our estimation of the output entropy for a tensor product of the phase damping channel and the identity channel based upon the decreasing property of the relative entropy allows to prove the additivity conjecture for the minimal output entropy for the quantum depolarizing channel in any prime dimesnsion and for the "two Pauli" channel in the qubit case.

  18. A reliable, fast and low cost maximum power point tracker for photovoltaic applications

    SciTech Connect (OSTI)

    Enrique, J.M.; Andujar, J.M.; Bohorquez, M.A. [Departamento de Ingenieria Electronica, de Sistemas Informaticos y Automatica, Universidad de Huelva (Spain)

    2010-01-15T23:59:59.000Z

    This work presents a new maximum power point tracker system for photovoltaic applications. The developed system is an analog version of the ''P and O-oriented'' algorithm. It maintains its main advantages: simplicity, reliability and easy practical implementation, and avoids its main disadvantages: inaccurateness and relatively slow response. Additionally, the developed system can be implemented in a practical way at a low cost, which means an added value. The system also shows an excellent behavior for very fast variables in incident radiation levels. (author)

  19. Study on Two Optimization Problems: Line Cover and Maximum Genus Embedding

    E-Print Network [OSTI]

    Cao, Cheng

    2012-07-16T23:59:59.000Z

    programming duality. We de ne a new problem called Non-collinear Packing Problem (NPP) as the following: De nition B.1. Non-collinear Packing Problem Given a set P of n points on the Euclidean plane R2, nd a maximum subset S P of non-collinear points, i....e. any three points are not collinear. Before proving the duality between NPP and LCP, we need to show how to formulate both problems to linear programming. To formulate the form of linear pro- gramming for instances of LCP and NNP, we use a few...

  20. Application of Maximum Entropy Method to Lattice Field Theory with a Topological Term

    E-Print Network [OSTI]

    M. Imachi; Y. Shinno; H. Yoneyama

    2003-09-22T23:59:59.000Z

    In Monte Carlo simulation, lattice field theory with a $\\theta$ term suffers from the sign problem. This problem can be circumvented by Fourier-transforming the topological charge distribution $P(Q)$. Although this strategy works well for small lattice volume, effect of errors of $P(Q)$ becomes serious with increasing volume and prevents one from studying the phase structure. This is called flattening. As an alternative approach, we apply the maximum entropy method (MEM) to the Gaussian $P(Q)$. It is found that the flattening could be much improved by use of the MEM.

  1. Conditional maximum-entropy method for selecting prior distributions in Bayesian statistics

    E-Print Network [OSTI]

    Abe, Sumiyoshi

    2014-01-01T23:59:59.000Z

    The conditional maximum-entropy method (abbreviated here as C-MaxEnt) is formulated for selecting prior probability distributions in Bayesian statistics for parameter estimation. This method is inspired by a statistical-mechanical approach to systems governed by dynamics with largely-separated time scales and is based on three key concepts: conjugate pairs of variables, dimensionless integration measures with coarse-graining factors and partial maximization of the joint entropy. The method enables one to calculate a prior purely from a likelihood in a simple way. It is shown in particular how it not only yields Jeffreys's rules but also reveals new structures hidden behind them.

  2. Charmonium spectra at finite temperature from QCD sum rules with the maximum entropy method

    E-Print Network [OSTI]

    Philipp Gubler; Kenji Morita; Makoto Oka

    2011-08-30T23:59:59.000Z

    Charmonia spectral functions at finite temperature are studied using QCD sum rules in combination with the maximum entropy method. This approach enables us to directly obtain the spectral function from the sum rules, without having to introduce any specific assumption about its functional form. As a result, it is found that while J/psi and eta_c manifest themselves as significant peaks in the spectral function below the deconfinement temperature T_c, they quickly dissolve into the continuum and almost completely disappear at temperatures between 1.0 T_c and 1.1 T_c.

  3. Spectral density analysis of time correlation functions in lattice QCD using the maximum entropy method

    E-Print Network [OSTI]

    H. Rudolf Fiebig

    2002-10-31T23:59:59.000Z

    We study various aspects of extracting spectral information from time correlation functions of lattice QCD by means of Bayesian inference with an entropic prior, the maximum entropy method (MEM). Correlator functions of a heavy-light meson-meson system serve as a repository for lattice data with diverse statistical quality. Attention is given to spectral mass density functions, inferred from the data, and their dependence on the parameters of the MEM. We propose to employ simulated annealing, or cooling, to solve the Bayesian inference problem, and discuss practical issues of the approach.

  4. Maximum Entropy and the Stress Distribution in Soft Disk Packings Above Jamming

    E-Print Network [OSTI]

    Yegang Wu; S. Teitel

    2014-10-17T23:59:59.000Z

    We show that the maximum entropy hypothesis can successfully explain the distribution of stresses on compact clusters of particles within disordered mechanically stable packings of soft, isotropically stressed, frictionless disks above the jamming transition. We show that, in our two dimensional case, it becomes necessary to consider not only the stress but also the Maxwell-Cremona force-tile area, as a constraining variable that determines the stress distribution. The importance of the force-tile area was suggested by earlier computations on an idealized force-network ensemble.

  5. Spectral Functions, Maximum Entropy Method and Unconventional Methods in Lattice Field Theory

    E-Print Network [OSTI]

    Chris Allton; Danielle Blythe; Jonathan Clowser

    2002-04-26T23:59:59.000Z

    We present two unconventional methods of extracting information from hadronic 2-point functions produced by Monte Carlo simulations. The first is an extension of earlier work by Leinweber which combines a QCD Sum Rule approach with lattice data. The second uses the Maximum Entropy Method to invert the 2-point data to obtain estimates of the spectral function. The first approach is applied to QCD data, and the second method is applied to the Nambu--Jona-Lasinio model in (2+1)D. Both methods promise to augment the current approach where physical quantities are extracted by fitting to pure exponentials.

  6. On Weyl channels being covariant with respect to the maximum commutative group of unitaries

    SciTech Connect (OSTI)

    Amosov, Grigori G. [Department of Higher Mathematics, Moscow Institute of Physics and Technology, Dolgoprudny 141700 (Russian Federation)

    2007-01-15T23:59:59.000Z

    We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the 'two-Pauli' channel as well. Then, we show that our estimation of the output entropy for a tensor product of the phase damping channel and the identity channel based upon the decreasing property of the relative entropy allows to prove the additivity conjecture for the minimal output entropy for the quantum depolarizing channel in any prime dimension and for the two-Pauli channel in the qubit case.

  7. Maximum entropy analysis of hadron spectral functions and excited states in quenched lattice QCD

    E-Print Network [OSTI]

    CP-PACS Collaboration; :; S. Aoki; R. Burkhalter; M. Fukugita; S. Hashimoto; N. Ishizuka; Y. Iwasaki; K. Kanaya; T. Kaneko; Y. Kuramashi; M. Okawa; Y. Taniguchi; A. Ukawa; T. Yamazaki; T. Yoshié

    2001-10-16T23:59:59.000Z

    Employing the maximum entropy method we extract the spectral functions from meson correlators at four lattice spacings in quenched QCD with the Wilson quark action. We confirm that the masses and decay constants, obtained from the position and the area of peaks, agree well with the results from the conventional exponential fit. For the first excited state, we obtain $m_{\\pi_1} = 660(590)$ MeV, $m_{\\rho_1} = 1540(570)$ MeV, and $f_{\\rho_1} = 0.085(36)$ in the continuum limit.

  8. The effect of longitudinal spacer ribs on the minimum pressure drop in a heated annulus

    SciTech Connect (OSTI)

    Johnston, B.S.; Neff, J.M.

    1990-01-01T23:59:59.000Z

    When evaluating a heated flow passage for vulnerability to static flow excursions, special note should be taken of flow restrictions which might allow premature vapor generation. In this study, measurements of steady state pressure drop were made for the downward flow of water in a vertical annulus. The outer wall was uniformly heated to allow subcooled boiling. Minima in the pressure drop characteristics were compared for test sections with and without longitudinal spacer ribs. For a given power and inlet temperature, the minimum occurred at a higher flow rate in the ribbed test section. This is attributed to vapor generation at the ribs. The work cited in this document show how a restriction in a heated channel can produce vapor which would not be observed in the absence of the restriction. In the present study, the effect of a flow restriction on the tendency to flow excursion is explored by finding demand curves for a heated annulus in subcooled boiling flow. The annulus is heated from the outside, and alternately equipped with and without longitudinal spacer ribs. These ribs separate the heated and unheated walls; in pressing against the heated wall they provide a means for premature vapor production.

  9. Metaproteomics reveals differential modes of metabolic coupling among ubiquitous oxygen minimum zone microbes

    SciTech Connect (OSTI)

    Hawley, Alyse K.; Brewer, Heather M.; Norbeck, Angela D.; Pasa-Tolic, Ljiljana; Hallam, Steven J.

    2014-08-05T23:59:59.000Z

    Oxygen minimum zones (OMZs) are intrinsic water column features arising from respiratory oxygen demand during organic matter degradation in stratified marine waters. Currently OMZs are expanding due to global climate change. This expansion alters marine ecosystem function and the productivity of fisheries due to habitat compression and changes in biogeochemical cycling leading to fixed nitrogen loss and greenhouse gas production. Here we use metaproteomics to chart spatial and temporal patterns of gene expression along defined redox gradients in a seasonally anoxic fjord, Saanich Inlet to better understand microbial community responses to OMZ expansion. The expression of metabolic pathway components for nitrification, anaerobic ammonium oxidation (anammox), denitrification and inorganic carbon fixation predominantly co-varied with abundance and distribution patterns of Thaumarchaeota, Nitrospira, Planctomycetes and SUP05/ARCTIC96BD-19 Gammaproteobacteria. Within these groups, pathways mediating inorganic carbon fixation and nitrogen and sulfur transformations were differentially expressed across the redoxcline. Nitrification and inorganic carbon fixation pathways affiliated with Thaumarchaeota dominated dysoxic waters and denitrification, sulfur-oxidation and inorganic carbon fixation pathways affiliated with SUP05 dominated suboxic and anoxic waters. Nitrite-oxidation and anammox pathways affiliated with Nitrospina and Planctomycetes respectively, also exhibited redox partitioning between dysoxic and suboxic waters. The differential expression of these pathways under changing water column redox conditions has quantitative implications for coupled biogeochemical cycling linking different modes of inorganic carbon fixation with distributed nitrogen and sulfur-based energy metabolism extensible to coastal and open ocean OMZs.

  10. Minimum Bias Trigger Scintillators for ATLAS: Commissioning and Run 2 Initial Operation

    E-Print Network [OSTI]

    Dano Hoffmann, Maria; The ATLAS collaboration

    2015-01-01T23:59:59.000Z

    The Minimum Bias Trigger Scintillators (MBTS) delivered the primary trigger for selecting events from low luminosity proton-proton, lead-lead and lead-proton collisions with the smallest possible bias during LHC Run 1 (2009-2013). Similarly, the MBTS will select events for the first Run 2 physics measurements, for instance charge multiplicity, proton-proton cross section, rapidity gap measurements, etc. at the unprecedented 13 TeV center of mass energy of proton-proton collisions. We will review the upgrades to the MBTS detector that have been implemented during the 2013-2014 shutdown. New scintillators have been installed to replace the radiation damaged ones, a modified optical readout scheme have been adopted to increase the light yield and an improved data acquisition chain has been used to cope with the few issues observed during Run 1 operations. Since late 2014, MBTS have been commissioned during cosmic data taking, first LHC beam splashes and single beam LHC fills. The goal is to have a fully commissi...

  11. On the 27-day Variations of Cosmic Ray Intensity in Recent Solar Minimum 23/24

    E-Print Network [OSTI]

    Modzelewska, R

    2015-01-01T23:59:59.000Z

    We have studied the 27-day variations and their harmonics of the galactic cosmic ray (GCR) intensity, solar wind velocity, and interplanetary magnetic field (IMF) components in the recent prolonged solar minimum 23 24. The time evolution of the quasi-periodicity in these parameters connected with the Suns rotation reveals that their synodic period is stable and is aprox 26-27 days. This means that the changes in the solar wind speed and IMF are related to the Suns near equatorial regions in considering the differential rotation of the Sun. However, the solar wind parameters observed near the Earths orbit provide only the conditions in the limited local vicinity of the equatorial region in the heliosphere (within in latitude). We also demonstrate that the observed period of the GCR intensity connected with the Suns rotation increased up to aprox 33-36 days in 2009. This means that the process driving the 27-day variations of the GCR intensity takes place not only in the limited local surroundings of the equato...

  12. Approaching the Minimum Thermal Conductivity in Rhenium-Substituted Higher Manganese Silicides

    SciTech Connect (OSTI)

    Chen, Xi [University of Texas at Austin] [University of Texas at Austin; Girard, S. N. [University of Wisconsin, Madison] [University of Wisconsin, Madison; Meng, F. [University of Wisconsin, Madison] [University of Wisconsin, Madison; Lara-Curzio, Edgar [ORNL] [ORNL; Jin, S [University of Wisconsin, Madison] [University of Wisconsin, Madison; Goodenough, J. B. [University of Texas at Austin] [University of Texas at Austin; Zhou, J. S. [University of Texas at Austin] [University of Texas at Austin; Shi, L [University of Texas at Austin] [University of Texas at Austin

    2014-01-01T23:59:59.000Z

    Higher manganese silicides (HMS) made of earth-abundant and non-toxic elements are regarded as promising p-type thermoelectric materials because their complex crystal structure results in low lattice thermal conductivity. It is shown here that the already low thermal conductivity of HMS can be reduced further to approach the minimum thermal conductivity via partial substitu- tion of Mn with heavier rhenium (Re) to increase point defect scattering. The solubility limit of Re in the obtained RexMn1 xSi1.8 is determined to be about x = 0.18. Elemental inhomogeneity and the formation of ReSi1.75 inclusions with 50 200 nm size are found within the HMS matrix. It is found that the power factor does not change markedly at low Re content of x 0.04 before it drops considerably at higher Re contents. Compared to pure HMS, the reduced lattice thermal conductivity in RexMn1 xSi1.8 results in a 25% increase of the peak figure of merit ZT to reach 0.57 0.08 at 800 K for x = 0.04. The suppressed thermal conductivity in the pure RexMn1 xSi1.8 can enable further investigations of the ZT limit of this system by exploring different impurity doping strategies to optimize the carrier concentration and power factor.

  13. The Effect of Proton Temperature Anisotropy on the Solar Minimum Corona and Wind

    E-Print Network [OSTI]

    Alberto M. Vasquez; Adriaan A. van Ballegooijen; John C. Raymond

    2003-10-29T23:59:59.000Z

    A semi-empirical, axisymmetric model of the solar minimum corona is developed by solving the equations for conservation of mass and momentum with prescribed anisotropic temperature distributions. In the high-latitude regions, the proton temperature anisotropy is strong and the associated mirror force plays an important role in driving the fast solar wind; the critical point where the outflow velocity equals the parallel sound speed is reached already at 1.5 Rsun from Sun center. The slow wind arises from a region with open field lines and weak anisotropy surrounding the equatorial streamer belt. The model parameters were chosen to reproduce the observed latitudinal extent of the equatorial streamer in the corona and at large distance from the Sun. We find that the magnetic cusp of the closed-field streamer core lies at about 1.95 Rsun. The transition from fast to slow wind is due to a decrease in temperature anisotropy combined with the non-monotonic behavior of the non-radial expansion factor in flow tubes that pass near the streamer cusp. In the slow wind, the plasma beta is of order unity and the critical point lies at about 5 Rsun, well beyond the magnetic cusp. The predicted outflow velocities are consistent with OVI Doppler dimming measurements from UVCS/SOHO. We also find good agreement with polarized brightness (pB) measurements from LASCO/SOHO and HI Ly-alpha images from UVCS/SOHO.

  14. Solar wind turbulence at 0.72 AU and solar minimum

    E-Print Network [OSTI]

    Teodorescu, Eliza; Munteanu, Costel; Zhang, Tielong; Bruno, Roberto; Kovacs, Peter

    2015-01-01T23:59:59.000Z

    We investigate Venus Express (VEX) observations of magnetic field fluctuations performed systematically in the solar wind at 0.72 Astronomical Units (AU), between 2007 and 2009, during the deep minimum of the solar cycle 24. The Power Spectral Densities (PSD) of the magnetic field components have been computed for the time intervals that satisfy data integrity criteria and have been grouped according to the type of wind, fast and slow defined for speeds larger and respectively smaller than 450 km/s. The PSDs show higher levels of power for the fast than for the slow wind. The spectral slopes estimated for all PSDs in the frequency range 0.005-0.1 Hz exhibit a normal distribution. The average value of the trace of the spectral matrix is -1.60 for fast solar wind and -1.65 for slow wind. Compared to the corresponding average slopes at 1 AU, the PSDs are shallower at 0.72 AU for slow wind conditions suggesting a steepening of the solar wind spectra between Venus and Earth. No significant time variation trend is ...

  15. Minimum 186 Basin levels required for operation of ECS and CWS pumps

    SciTech Connect (OSTI)

    Reeves, K.K.; Barbour, K.L.

    1992-10-01T23:59:59.000Z

    Operation of K Reactor with a cooling tower requires that 186 Basin loss of inventory transients be considered during Design Basis Accident analyses requiring ECS injection, such as the LOCA and LOPA. Since the cooling tower systems are not considered safety systems, credit is not taken for their continued operation during a LOPA or LOCA even though they would likely continue to operate as designed. Without the continued circulation of cooling water to the 186 Basin by the cooling tower pumps, the 186 Basin will lose inventory until additional make-up can be obtained from the river water supply system. Increasing the make-up to the 186 Basin from the river water system may require the opening of manually operated valves, the starting of additional river water pumps, and adjustments of the flow to L Area. In the time required for these actions a loss of basin inventory could occur. The ECS and CWS pumps are supplied by the 186 Basin. A reduction in the basin level will result in decreased pump suction head. This reduction in suction head will result in decreased output from the pumps and, if severe enough, could lead to pump cavitation for some configurations. The subject of this report is the minimum 186 Basin level required to prevent ECS and CWS pump cavitation. The reduction in ECS flow due to a reduced 186 Basin level without cavitation is part of a separate study.

  16. Determine Minimum Silver Flake Addition to GCM for Iodine Loaded AgZ

    SciTech Connect (OSTI)

    Garino, Terry J.; Nenoff, Tina M.; Rodriguez, Mark A.

    2014-04-01T23:59:59.000Z

    The minimum amount of silver flake required to prevent loss of I{sub 2} during sintering in air for a SNL Glass Composite Material (GCM) Waste Form containing AgI-MOR (ORNL, 8.7 wt%) was determined to be 1.1 wt% Ag. The final GCM composition prior to sintering was 20 wt% AgI-MOR, 1.1 wt% Ag, and 80 wt% Bi-Si oxide glass. The amount of silver flake needed to suppress iodine loss was determined using thermo gravimetric analysis with mass spectroscopic off-gas analysis. These studies found that the ratio of silver to AgI-MOR required is lower in the presence of the glass than without it. Therefore an additional benefit of the GCM is that it serves to inhibit some iodine loss during processing. Alternatively, heating the AgI-MOR in inert atmosphere instead of air allowed for densified GCM formation without I{sub 2} loss, and no necessity for the addition of Ag. The cause of this behavior is found to be related to the oxidation of the metallic Ag to Ag{sup +} when heated to above ~300{degrees}C in air. Heating rate, iodine loading levels and atmosphere are the important variables that determine AgI migration and results suggest that AgI may be completely incorporated into the mordenite structure by the 550{degrees}C sintering temperature.

  17. Maximum cooling temperature and uniform efficiency criterion for inhomogeneous thermoelectric materials

    E-Print Network [OSTI]

    Wang, Hongyun

    electronic circuits, and microscale low power freezers for biological single cell storage. Since 1990s, nano materials due to the distributed Peltier cooling compensating for the internal Joule heating.7,8 Essentially

  18. An exploratory design of a 65 nm CMOS buck converter for maximum efficiency

    E-Print Network [OSTI]

    Lin, Doris, M. Eng. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    Portable battery-operated consumer devices, such as mp3 players, cell phones, and digital cameras, are becoming ever more prevalent and so the need for long battery life is increasingly important. These small devices contain ...

  19. OPTIMAL DESIGN OF HYBRID FUEL CELL VEHICLES

    E-Print Network [OSTI]

    Jeongwoo Han; Michael Kokkolaras; Panos Papalambros

    Fuel cells are being considered increasingly as a viable alternative energy source for automobiles because of their clean and efficient power generation. Numerous technological concepts have been developed and compared in terms of safety, robust operation, fuel economy, and vehicle performance. However, several issues still exist and must be addressed to improve the viability of this emerging technology. Despite the relatively large number of models and prototypes, a model-based vehicle design capability with sufficient fidelity and efficiency is not yet available in the literature. In this article we present an analysis and design optimization model for fuel cell vehicles that can be applied to both hybrid and non-hybrid vehicles by integrating a fuel cell vehicle simulator with a physics-based fuel cell model. The integration is achieved via quasi-steady fuel cell performance maps, and provides the ability to modify the characteristics of fuel cell systems with sufficient accuracy (less than 5 % error) and efficiency (98 % computational time reduction on average). Thus, a vehicle can be optimized subject to constraints that include various performance metrics and design specifications so that the overall efficiency of the hybrid fuel cell vehicle can be improved by 14 % without violating any constraints. The obtained optimal fuel cell system is also compared to other, not vehicle-related, fuel cell systems optimized for maximum power density or maximum efficiency. A tradeoff between power density and efficiency can be observed depending on the size of compressors. Typically, a larger compressor results in higher fuel cell power density at the cost of fuel cell efficiency because it operates in a wider current region. When optimizing the fuel cell

  20. Electric Power Network Security Analysis via Minimum Cut Relaxation Kin Cheong Sou, Henrik Sandberg and Karl Henrik Johansson

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    ) and ma directed arcs (i.e., transmission lines) on which power flows. The flow can The authorsElectric Power Network Security Analysis via Minimum Cut Relaxation Kin Cheong Sou, Henrik Sandberg the security of power transmission networks is presented. In order to strategically allocate protection devices

  1. Speech Enhancement of Spectral Magnitude Bin Trajectories using Gaussian Mixture-Model based Minimum Mean-Square Error Estimators

    E-Print Network [OSTI]

    Speech Enhancement of Spectral Magnitude Bin Trajectories using Gaussian Mixture-Model based mean-square error es- timators have been applied to speech enhancement in the tem- poral, transform (e estimator for 8 kHz telephone-quality speech. Index Terms: Speech enhancement, minimum mean-square er- ror

  2. Distributed multichannel speech enhancement with minimum mean-square error short-time spectral amplitude, log-spectral

    E-Print Network [OSTI]

    Johnson, Michael T.

    Distributed multichannel speech enhancement with minimum mean-square error short-time spectral Keywords: Acoustic arrays Speech enhancement Amplitude estimation Phase estimation Parameter estimation a b on the development and implementation of speech enhancement algorithms. Whereas the current state-of-the-art methods

  3. A Minimum Free Energy Reaction Path for the E2 Reaction between Fluoro Ethane and a Fluoride Ion

    E-Print Network [OSTI]

    Nielsen, Steven O.

    A Minimum Free Energy Reaction Path for the E2 Reaction between Fluoro Ethane and a Fluoride Ion, such as the mechanism and the free-energy profile, remains an important challenge not only for enzyme catalysis1 of the reaction free-energy profile is very cumbersome with constrained molecular dynamics (MD) and umbrella

  4. Energy management of power-split plug-in hybrid electric vehicles based on simulated annealing and Pontryagin's minimum principle

    E-Print Network [OSTI]

    Mi, Chunting "Chris"

    Energy management of power-split plug-in hybrid electric vehicles based on simulated annealing Accepted 14 August 2014 Available online 27 August 2014 Keywords: Plug-in hybrid electric vehicles Fuel-rate Pontryagin's minimum principle Simulated annealing State of health a b s t r a c t In this paper, an energy

  5. Map of Erosion Risk (C2)3 Vegetation Indices and Map of Minimum Forested Area4 5&

    E-Print Network [OSTI]

    are required forest areas for Vietnam Erosion Risk Map Cover types C1 Natural Forests >1.7 Plantation forest.2 (ESRI, 2008), to generate a map of required protective forest area for Vietnam. (3) (4) (5Results Map of Erosion Risk (C2)3 Vegetation Indices and Map of Minimum Forested Area4 5& · Map

  6. A dual model-free control of non-minimum phase systems for generation of stable limit cycles

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A dual model-free control of non-minimum phase systems for generation of stable limit cycles S parameters tuning. It is therefore easy to build a controller for an unknown system. Model-free control has of flow. In [14], model-free control methodology is applied to a power converter, where stable regulation

  7. Oxygen and organic matter thresholds for benthic faunal activity on the Pakistan margin oxygen minimum zone (7001100 m)

    E-Print Network [OSTI]

    Levin, Lisa

    Oxygen and organic matter thresholds for benthic faunal activity on the Pakistan margin oxygen increased animal activity associated with increasing bottom-water oxygen concentration. We examined faunal community responses to oxygen and organic matter gradients across the lower oxygen minimum zone (OMZ

  8. JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING / SEPTEMBER/OCTOBER 2001 / 287 DESIGN OF MINIMUM SEEPAGE LOSS CANAL SECTIONS WITH

    E-Print Network [OSTI]

    Chahar, B. R.

    conveyance systems for deliv- ering water for irrigation. The seepage loss from irrigation canals constitutesJOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING / SEPTEMBER/OCTOBER 2001 / 287 DESIGN OF MINIMUM other factors [International Commission on Irrigation and Drainage (ICID) (1967)]. Analytical solutions

  9. 28 / JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING / JANUARY/FEBRUARY 2000 DESIGN OF MINIMUM SEEPAGE LOSS CANAL SECTIONS

    E-Print Network [OSTI]

    Chahar, B. R.

    . INTRODUCTION Canals continue to be major conveyance systems for deliv- ering water for irrigation28 / JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING / JANUARY/FEBRUARY 2000 DESIGN OF MINIMUM in the alluvial plains of India. But the seepage loss from irrigation canals constitutes a substantial percentage

  10. An Association of Independent Blue Cross and Blue Shield Plans This health plan meets Minimum Creditable Coverage Standards for

    E-Print Network [OSTI]

    Aalberts, Daniel P.

    An Association of Independent Blue Cross and Blue Shield Plans This health plan meets Minimum, as part of the Massachusetts Health Care Reform Law. HMO Blue New EnglandSM Summary of Benefits Williams College #12;Your Care Your Primary Care Provider. When you enroll in HMO Blue New England, you must choose

  11. Non Intrusive Measures for Determining the Minimum Field of View for User Search Task in 3D Virtual Environments

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Non Intrusive Measures for Determining the Minimum Field of View for User Search Task in 3D Virtual on the use of several novel non- intrusive temporal and quantitative measures of visual attention, such as engines. The use of this virtual camera can show interesting results for non-invasive study

  12. Synthesis of controllers for non-minimum phase and unstable systems using non-sequential MIMO quantitative feedback theory

    E-Print Network [OSTI]

    Lan, Chenyang

    2005-08-29T23:59:59.000Z

    Considered in this thesis is multi-input multi-output (MIMO) systems with non-minimum phase (NMP) zeros and unstable poles where some of the unstable poles are located to the right of the NMP zeros. In the single-input single-output (SISO) case...

  13. Miniature fuel-cell system complete with on-demand fuel and oxidant supply

    E-Print Network [OSTI]

    Hur, JI; Kim, C-J

    2015-01-01T23:59:59.000Z

    cell system. The maximum power density of 18.8 mW/cm 2 wascell [23]. Not only the power density slightly improved butcorresponds to the power density axis. The measurements

  14. The ACT{sup 2} project: Demonstration of maximum energy efficiency in real buildings

    SciTech Connect (OSTI)

    Crawley, D.B. [Pacific Northwest Lab., Richland, WA (United States); Krieg, B.L. [Pacific Gas and Electric Co., San Ramon, CA (United States)

    1991-11-01T23:59:59.000Z

    A large US utility recently began a project to determine whether the use of new energy-efficient end-use technologies and systems would economically achieve substantial energy savings (perhaps as high as 75% over current practice). Using a field-based demonstration approach, the Advanced Customer Technology Test (ACT{sup 2}) for Maximum Energy Efficiency is providing information on the maximum energy savings possible when integrated packages of new high-efficiency end-use technologies are incorporated into commercial and residential buildings and industrial and agricultural processes. This paper details the underlying rationale, approach, results to date, and future plans for ACT{sup 2}. The ultimate goal is energy efficiency (doing more with less energy) rather than energy conservation (freezing in the dark). In this paper, we first explain why a major United States utility is committed to pursuing demand-side management so aggressively. Next, we discuss the approach the utility chose for conducting the ACT{sup 2} project. We then review results obtained to date from the project`s pilot demonstration site. Last, we describe other related demonstration projects being proposed by the utility.

  15. The ACT sup 2 project: Demonstration of maximum energy efficiency in real buildings

    SciTech Connect (OSTI)

    Crawley, D.B. (Pacific Northwest Lab., Richland, WA (United States)); Krieg, B.L. (Pacific Gas and Electric Co., San Ramon, CA (United States))

    1991-11-01T23:59:59.000Z

    A large US utility recently began a project to determine whether the use of new energy-efficient end-use technologies and systems would economically achieve substantial energy savings (perhaps as high as 75% over current practice). Using a field-based demonstration approach, the Advanced Customer Technology Test (ACT{sup 2}) for Maximum Energy Efficiency is providing information on the maximum energy savings possible when integrated packages of new high-efficiency end-use technologies are incorporated into commercial and residential buildings and industrial and agricultural processes. This paper details the underlying rationale, approach, results to date, and future plans for ACT{sup 2}. The ultimate goal is energy efficiency (doing more with less energy) rather than energy conservation (freezing in the dark). In this paper, we first explain why a major United States utility is committed to pursuing demand-side management so aggressively. Next, we discuss the approach the utility chose for conducting the ACT{sup 2} project. We then review results obtained to date from the project's pilot demonstration site. Last, we describe other related demonstration projects being proposed by the utility.

  16. 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

    2015-01-01T23:59:59.000Z

    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...

  17. Quantifying extrinsic noise in gene expression using the maximum entropy framework

    E-Print Network [OSTI]

    Purushottam D. Dixit

    2013-04-04T23:59:59.000Z

    We present a maximum entropy framework to separate intrinsic and extrinsic contributions to noisy gene expression solely from the profile of expression. We express the experimentally accessible probability distribution of the copy number of the gene product (mRNA or protein) by accounting for possible variations in extrinsic factors. The distribution of extrinsic factors is estimated using the maximum entropy principle. Our results show that extrinsic factors qualitatively and quantitatively affect the probability distribution of the gene product. We work out, in detail, the transcription of mRNA from a constitutively expressed promoter in {\\it E. coli}. We suggest that the variation in extrinsic factors may account for the observed {\\it wider than Poisson} distribution of mRNA copy numbers. We successfully test our framework on a numerical simulation of a simple gene expression scheme that accounts for the variation in extrinsic factors. We also make falsifiable predictions, some of which are tested on previous experiments in {\\it E. coli} while others need verification. Application of the current framework to more complex situations is also discussed.

  18. Quantum maximum-entropy principle for closed quantum hydrodynamic transport within a Wigner function formalism

    SciTech Connect (OSTI)

    Trovato, M. [Dipartimento di Matematica, Universita di Catania, Viale A. Doria, I-95125 Catania (Italy); Reggiani, L. [Dipartimento di Ingegneria dell' Innovazione and CNISM, Universita del Salento, Via Arnesano s/n, I-73100 Lecce (Italy)

    2011-12-15T23:59:59.000Z

    By introducing a quantum entropy functional of the reduced density matrix, the principle of quantum maximum entropy is asserted as fundamental principle of quantum statistical mechanics. Accordingly, we develop a comprehensive theoretical formalism to construct rigorously a closed quantum hydrodynamic transport within a Wigner function approach. The theoretical formalism is formulated in both thermodynamic equilibrium and nonequilibrium conditions, and the quantum contributions are obtained by only assuming that the Lagrange multipliers can be expanded in powers of ({h_bar}/2{pi}){sup 2}. In particular, by using an arbitrary number of moments, we prove that (1) on a macroscopic scale all nonlocal effects, compatible with the uncertainty principle, are imputable to high-order spatial derivatives, both of the numerical density n and of the effective temperature T; (2) the results available from the literature in the framework of both a quantum Boltzmann gas and a degenerate quantum Fermi gas are recovered as a particular case; (3) the statistics for the quantum Fermi and Bose gases at different levels of degeneracy are explicitly incorporated; (4) a set of relevant applications admitting exact analytical equations are explicitly given and discussed; (5) the quantum maximum entropy principle keeps full validity in the classical limit, when ({h_bar}/2{pi}){yields}0.

  19. 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.

    2013-08-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Z. C. Tu

    2013-02-08T23:59:59.000Z

    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 ($<0.1$).

  1. Fabrication and transmission measurements of liquid crystal cells

    E-Print Network [OSTI]

    Yoon, Dae Won

    1984-01-01T23:59:59.000Z

    LC-cells. 67 to the twisted nematic LC-cells show low TC values (& 10X) up to 500 nm followed by rapid increase. TC maxima occur in 550 to 650 nm wavelength. TC maximum becomes sharper with decreasing cell thickness. For d = 6 pm, TC = 40X, max... d = 9 pm, TC - =35X and for 12 pm, TC =- 25X. max max For wavelengths longer than 700 nm, contrary to twisted nematic LC-cells, TC decreases with increasing wavelength. Gust-host LC-cells with Nx twist show higher TC than those with Npx/2 twist...

  2. Application of a MHD hybrid solar wind model with latitudinal dependences to Ulysses data at minimum

    E-Print Network [OSTI]

    A. Aibeo; J. Lima; C. Sauty

    2007-01-04T23:59:59.000Z

    In a previous work, Ulysses data was analyzed to build a complete axisymmetric MHD solution for the solar wind at minimum including rotation and the initial flaring of the solar wind in the low corona. This model has some problems in reproducing the values of magnetic field at 1 AU despite the correct values of the velocity. Here, we intend to extend the previous analysis to another type of solutions and to improve our modelling of the wind from the solar surface to 1 AU. We compare the previous results to those obtained with a fully helicoidal model and construct a hybrid model combining both previous solutions, keeping the flexibility of the parent models in the appropriate domain. From the solar surface to the Alfven, point, a three component solution for velocity and magnetic field is used, reproducing the complex wind geometry and the well-known flaring of the field lines observed in coronal holes. From the Alfven radius to 1 AU and further, the hybrid model keeps the latitudinal dependences as flexible as possible, in order to deal with the sharp variations near the equator and we use the helicoidal solution, turning the poloidal streamlines into radial ones. Despite the absence of the initial flaring, the helicoidal model and the first hybrid solution suffer from the same low values of the magnetic field at 1 AU. However, by adjusting the parameters with a second hybrid solution, we are able to reproduce both the velocity and magnetic profiles observed by Ulysses and a reasonable description of the low corona, provided that a certain amount of energy deposit exists along the flow. The present paper shows that analytical axisymmetric solutions can be constructed to reproduce the solar structure and dynamics from 1 solar radius up to 1 AU.

  3. Determination of the minimum masses of heavy elements in the envelopes of Jupiter and Saturn

    E-Print Network [OSTI]

    Olivier Mousis; Ulysse Marboeuf; Jonathan I. Lunine; Yann Alibert; Leigh N. Fletcher; Glenn S. Orton; Francoise Pauzat; Yves Ellinger

    2008-12-12T23:59:59.000Z

    We calculate the minimum mass of heavy elements required in the envelopes of Jupiter and Saturn to match the observed oversolar abundances of volatiles. Because the clathration efficiency remains unknown in the solar nebula, we have considered a set of sequences of ice formation in which the fraction of water available for clathration is varied between 0 and 100 %. In all the cases considered, we assume that the water abundance remains homogeneous whatever the heliocentric distance in the nebula and directly derives from a gas phase of solar composition. Planetesimals then form in the feeding zones of Jupiter and Saturn from the agglomeration of clathrates and pure condensates in proportions fixed by the clathration efficiency. A fraction of Kr and Xe may have been sequestrated by the H3+ ion in the form of stable XeH3+ and KrH3+ complexes in the solar nebula gas phase, thus implying the formation of at least partly Xe- and Kr-impoverished planetesimals in the feeding zones of Jupiter and Saturn. These planetesimals were subsequently accreted and vaporized into the hydrogen envelopes of Jupiter and Saturn, thus engendering volatiles enrichments in their atmospheres, with respect to hydrogen. Taking into account both refractory and volatile components, and assuming plausible molecular mixing ratios in the gas phase of the outer solar nebula, we show that it is possible to match the observed enrichments in Jupiter and Saturn, whatever the clathration efficiency. Our calculations predict that the O/H enrichment decreases from 6.7 to 5.6 times solar (O/H) in the envelope of Jupiter and from 18.1 to 15.4 times solar (O/H) in the envelope of Saturn with the growing clathration efficiency in the solar nebula.

  4. Engineering Spectral Control Using Front Surface Filters for Maximum TPV Energy Conversion System Performance

    SciTech Connect (OSTI)

    TD Rahmlaw, Jr; JE Lazo-Wasem; EJ Gratrix; JJ Azarkevich; EJ Brown; DM DePoy; DR Eno; PM Fourspring; JR Parrington; RG Mahorter; B Wernsman

    2004-08-04T23:59:59.000Z

    Energy conversion efficiencies of better than 23% have been demonstrated for small scale tests of a few thermophotovoltaic (TPV) cells using front surface, tandem filters [1,2]. The engineering challenge is to build this level of efficiency into arrays of cells that provide useful levels of energy. Variations in cell and filter performance will degrade TPV array performance. Repeated fabrication runs of several filters each provide an initial quantification of the fabrication variation for front surface, tandem filters for TPV spectral control. For three performance statistics, within-run variation was measured to be 0.7-1.4 percent, and run-to-run variation was measured to be 0.5-3.2 percent. Fabrication runs using a mask have been shown to reduce variation across interference filters from as high 8-10 percent to less than 1.5 percent. Finally, several system design and assembly approaches are described to further reduce variation.

  5. Engineering Spectral Control Using Front Surface Filters for Maximum TPV Energy Conversion System Performance

    SciTech Connect (OSTI)

    T Rahmlow, Jr; J Lazo-Wasem, E Gratrix; J Azarkevich; E Brown; D DePoy; D Eno; P Fourspring; J Parrington; R Mahorter; B Wernsman

    2004-10-14T23:59:59.000Z

    Energy conversion efficiencies of better than 23% have been demonstrated for small scale tests of a few thermophotovoltaic (TPV) cells using front surface, tandem filters [1, 2]. The engineering challenge is to build this level of efficiency into arrays of cells that provide useful levels of energy. Variations in cell and filter performance will degrade TPV array performance. Repeated fabrication runs of several filters each provide an initial quantification of the fabrication variation for front surface, tandem filters for TPV spectral control. For three performance statistics, within-run variation was measured to be 0.7-1.4 percent, and run-to-run variation was measured to be 0.5-3.2 percent. Fabrication runs using a mask have been shown to reduce variation across interference filters from as high as 8-10 percent to less than 1.5 percent. Finally, several system design and assembly approaches are described to further reduce variation.

  6. 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

    2006-11-29T23:59:59.000Z

    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.

  7. 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

    2015-01-01T23:59:59.000Z

    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...

  8. Role of ocean-atmosphere interactions in tropical cooling during the last glacial maximum

    SciTech Connect (OSTI)

    Bush, A.B.G. [Univ. of Alberta, Edmonton (Canada)] [Univ. of Alberta, Edmonton (Canada); Philander, S.G.H. [Princeton Univ., NJ (United States)] [Princeton Univ., NJ (United States)

    1998-02-27T23:59:59.000Z

    A simulation with a coupled atmosphere-ocean general circulation model configured for the Last Glacial Maximum delivered a tropical climate that is much cooler than that produced by atmosphere-only models. The main reason is a decrease in tropical sea surface temperatures, up to 6{degree}C in the western tropical Pacific, which occurs because of two processes. The trade winds induce equatorial upwelling and zonal advection of cold water that further intensify the trade winds, and an exchange of water occurs between the tropical and extratropical Pacific in which the poleward surface flow is balanced by equatorward flow of cold water in the thermocline. Simulated tropical temperature depressions are of the same magnitude as those that have been proposed from recent proxy data. 25 refs., 4 figs.

  9. From Physics to Economics: An Econometric Example Using Maximum Relative Entropy

    E-Print Network [OSTI]

    Giffin, Adom

    2009-01-01T23:59:59.000Z

    Econophysics, is based on the premise that some ideas and methods from physics can be applied to economic situations. We intend to show in this paper how a physics concept such as entropy can be applied to an economic problem. In so doing, we demonstrate how information in the form of observable data and moment constraints are introduced into the method of Maximum relative Entropy (MrE). A general example of updating with data and moments is shown. Two specific econometric examples are solved in detail which can then be used as templates for real world problems. A numerical example is compared to a large deviation solution which illustrates some of the advantages of the MrE method.

  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)

    2008-02-15T23:59:59.000Z

    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. Online Robot Dead Reckoning Localization Using Maximum Relative Entropy Optimization With Model Constraints

    SciTech Connect (OSTI)

    Urniezius, Renaldas [Kaunas University of Technology, Kaunas (Lithuania)

    2011-03-14T23:59:59.000Z

    The principle of Maximum relative Entropy optimization was analyzed for dead reckoning localization of a rigid body when observation data of two attached accelerometers was collected. Model constraints were derived from the relationships between the sensors. The experiment's results confirmed that accelerometers each axis' noise can be successfully filtered utilizing dependency between channels and the dependency between time series data. Dependency between channels was used for a priori calculation, and a posteriori distribution was derived utilizing dependency between time series data. There was revisited data of autocalibration experiment by removing the initial assumption that instantaneous rotation axis of a rigid body was known. Performance results confirmed that such an approach could be used for online dead reckoning localization.

  12. Azimuthal Anisotropy in Heavy Ion Collisions from the Maximum Entropy Method

    E-Print Network [OSTI]

    Pirner, Hans J

    2014-01-01T23:59:59.000Z

    We investigate the azimuthal anisotropy v2 of particle production in nucleus-nucleus collisions in the maximum entropy approach. This necessitates two new parameters delta and lambda2. The parameter delta describes the deformation of transverse configuration space and is related to the anisotropy of the overlap zone of the two nuclei. The parameter lambda2 defines the anisotropy of the particle distribution in momentum space. Assuming deformed flux tubes at the early stage of the collision we relate the momentum to the space asymmetry i.e. lambda2 to delta with the uncertainty relation. We compute the anisotropy v2 as a function of centrality, transverse momentum and rapidity using gluon-hadron duality. The general features of LHC data are reproduced.

  13. Source Function Determined from HBT Correlations by the Maximum Entropy Principle

    E-Print Network [OSTI]

    Wu Yuanfang; Ulrich Heinz

    1996-07-18T23:59:59.000Z

    We study the reconstruction of the source function in space-time directly from the measured HBT correlation function using the Maximum Entropy Principle. We find that the problem is ill-defined without at least one additional theoretical constraint as input. Using the requirement of a finite source lifetime for the latter we find a new Gaussian parametrization of the source function directly in terms of the measured HBT radius parameters and its lifetime, where the latter is a free parameter which is not directly measurable by HBT. We discuss the implications of our results for the remaining freedom in building source models consistent with a given set of measured HBT radius parameters.

  14. Spectral Analysis of Excited Nucleons in Lattice QCD with Maximum Entropy Method

    E-Print Network [OSTI]

    Kiyoshi Sasaki; Shoichi Sasaki; Tetsuo Hatsuda

    2005-07-12T23:59:59.000Z

    We study the mass spectra of excited baryons with the use of the lattice QCD simulations. We focus our attention on the problem of the level ordering between the positive-parity excited state N'(1440) (the Roper resonance) and the negative-parity excited state N^*(1535). Nearly perfect parity projection is accomplished by combining the quark propagators with periodic and anti-periodic boundary conditions in the temporal direction. Then we extract the spectral functions from the lattice data by utilizing the maximum entropy method. We observe that the masses of the N' and N^* states are close for wide range of the quark masses (M_pi=0.61-1.22 GeV), which is in contrast to the phenomenological prediction of the quark models. The role of the Wilson doublers in the baryonic spectral functions is also studied.

  15. A maximum-entropy approach to the adiabatic freezing of a supercooled liquid

    E-Print Network [OSTI]

    Santi Prestipino

    2013-04-29T23:59:59.000Z

    I employ the van der Waals theory of Baus and coworkers to analyze the fast, adiabatic decay of a supercooled liquid in a closed vessel with which the solidification process usually starts. By imposing a further constraint on either the system volume or pressure, I use the maximum-entropy method to quantify the fraction of liquid that is transformed into solid as a function of undercooling and of the amount of a foreign gas that could possibly be also present in the test tube. Upon looking at the implications of thermal and mechanical insulation for the energy cost of forming a solid droplet within the liquid, I identify one situation where the onset of solidification inevitably occurs near the wall in contact with the bath.

  16. 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

    2009-10-23T23:59:59.000Z

    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.

  17. Spectral function and excited states in lattice QCD with maximum entropy method

    E-Print Network [OSTI]

    CP-PACS Collaboration; :; T. Yamazaki; S. Aoki; R. Burkhalter; M. Fukugita; S. Hashimoto; N. Ishizuka; Y. Iwasaki; K. Kanaya; T. Kaneko; Y. Kuramashi; M. Okawa; Y. Taniguchi; A. Ukawa; T. Yoshié

    2001-05-29T23:59:59.000Z

    We apply the maximum entropy method to extract the spectral functions for pseudoscalar and vector mesons from hadron correlators previously calculated at four different lattice spacings in quenched QCD with the Wilson quark action. We determine masses and decay constants for the ground and excited states of the pseudoscalar and vector channels from position and area of peaks in the spectral functions. We obtain the results, $m_{\\pi_1} = 660(590)$ MeV and $m_{\\rho_1} = 1540(570)$ MeV for the masses of the first excited state masses, in the continuum limit of quenched QCD. We also find unphysical states which have infinite mass in the continuum limit, and argue that they are bound states of two doublers of the Wilson quark action. If the interpretation is correct, this is the first time that the state of doublers is identified in lattice QCD numerical simulations.

  18. Application of the Maximum Entropy Method to the (2+1)d Four-Fermion Model

    E-Print Network [OSTI]

    C. R. Allton; J. E. Clowser; S. J. Hands; J. B. Kogut; C. G. Strouthos

    2002-08-19T23:59:59.000Z

    We investigate spectral functions extracted using the Maximum Entropy Method from correlators measured in lattice simulations of the (2+1)-dimensional four-fermion model. This model is particularly interesting because it has both a chirally broken phase with a rich spectrum of mesonic bound states and a symmetric phase where there are only resonances. In the broken phase we study the elementary fermion, pion, sigma and massive pseudoscalar meson; our results confirm the Goldstone nature of the pi and permit an estimate of the meson binding energy. We have, however, seen no signal of sigma -> pi pi decay as the chiral limit is approached. In the symmetric phase we observe a resonance of non-zero width in qualitative agreement with analytic expectations; in addition the ultra-violet behaviour of the spectral functions is consistent with the large non-perturbative anomalous dimension for fermion composite operators expected in this model.

  19. Azimuthal Anisotropy in Heavy Ion Collisions from the Maximum Entropy Method

    E-Print Network [OSTI]

    Hans J. Pirner

    2014-05-09T23:59:59.000Z

    We investigate the azimuthal anisotropy v2 of particle production in nucleus-nucleus collisions in the maximum entropy approach. This necessitates two new parameters delta and lambda2. The parameter delta describes the deformation of transverse configuration space and is related to the anisotropy of the overlap zone of the two nuclei. The parameter lambda2 defines the anisotropy of the particle distribution in momentum space. Assuming deformed flux tubes at the early stage of the collision we relate the momentum to the space asymmetry i.e. lambda2 to delta with the uncertainty relation. We compute the anisotropy v2 as a function of centrality, transverse momentum and rapidity using gluon-hadron duality. The general features of LHC data are reproduced.

  20. CP$^{N-1}$ model with the theta term and maximum entropy method

    E-Print Network [OSTI]

    Masahiro Imachi; Yasuhiko Shinno; Hiroshi Yoneyama

    2004-09-25T23:59:59.000Z

    A $\\theta$ term in lattice field theory causes the sign problem in Monte Carlo simulations. This problem can be circumvented by Fourier-transforming the topological charge distribution $P(Q)$. This strategy, however, has a limitation, because errors of $P(Q)$ prevent one from calculating the partition function ${\\cal Z}(\\theta)$ properly for large volumes. This is called flattening. As an alternative approach to the Fourier method, we utilize the maximum entropy method (MEM) to calculate ${\\cal Z}(\\theta)$. We apply the MEM to Monte Carlo data of the CP$^3$ model. It is found that in the non-flattening case, the result of the MEM agrees with that of the Fourier transform, while in the flattening case, the MEM gives smooth ${\\cal Z}(\\theta)$.