Sample records for time horizon concerns

  1. Horizons in Robinson-Trautman space-times

    E-Print Network [OSTI]

    W. Natorf; J. Tafel

    2008-07-18T23:59:59.000Z

    The past quasi-local horizons in vacuum Robinson-Trautman spacetimes are described. The case of a null (non-expanding) horizon is discussed. It is shown that the only Robinson-Trautman space-time admitting such a horizon with sections diffeomorphic to S_2 is the Schwarzschild space-time. Weakening this condition leads to the horizons of the C-metric. Properties of the hypersurface r=2m for finite retarded time u are examined.

  2. Trade-Offs Between Precision and Computation Horizon in Real-Time Optimal Control of Switched Systems

    E-Print Network [OSTI]

    Egerstedt, Magnus

    Trade-Offs Between Precision and Computation Horizon in Real-Time Optimal Control of Switched computational resources available in many real-time applications, questions concerning trade-offs between the computation horizon and the precision of the solution arise naturally. These trade-offs constitute the main

  3. Effect of time horizon on incremental cost-effectiveness ratios

    E-Print Network [OSTI]

    Sondhi, Manu

    2005-01-01T23:59:59.000Z

    Background: Estimation of cost-effectiveness of a therapy as compared with another, in healthcare, is often based on a single perspective and a single time horizon. In this thesis, I explored methods of extrapolating the ...

  4. Time Horizons of Environmental vs. Non-Environmental Costs

    E-Print Network [OSTI]

    Tovey, Craig A.

    1 1 #12;Time Horizons of Environmental vs. Non-Environmental Costs: Evidence from U.S. Tort Fellowship #12;Abstract One explanation for a positive correlation between environmental and financial differences between environmental and other investment opportunities. One of these systematic differences

  5. Dynamic Pricing Strategies under a Finite Time Horizon Joan Morris DiMicco

    E-Print Network [OSTI]

    to scalpers. Cost has been perhaps the greatest factor precluding the widespread use of dynamic pricing goods, but in digital markets, the costs associated with making frequent, instantaneous price changesDynamic Pricing Strategies under a Finite Time Horizon Joan Morris DiMicco MIT Media Laboratory 20

  6. The stability of Killing-Cauchy horizons in colliding plane wave space-times

    E-Print Network [OSTI]

    J. B. Griffiths

    2005-01-05T23:59:59.000Z

    It is confirmed rigorously that the Killing-Cauchy horizons, which sometimes occur in space-times representing the collision and subsequent interaction of plane gravitational waves in a Minkowski background, are unstable with respect to bounded perturbations of the initial waves, at least for the case in which the initial waves have constant aligned polarizations.

  7. Modeling exchange rate dependence dynamics at different time horizons

    E-Print Network [OSTI]

    Embrechts, Paul

    , Copula-GARCH, Conditional dependence, Dynamic copula Corresponding author. Tel.: +44(0) 247 657 4297. Financial time-series are often modeled with GARCH type models. In the multivariate GARCH literature there exist several models, like CCC- GARCH, DVEC, matrix-diagonal GARCH, BEKK and principal components GARCH

  8. Multi-horizon solar radiation forecasting for Mediterranean locations using time series models

    E-Print Network [OSTI]

    Voyant, Cyril; Muselli, Marc; Nivet, Marie Laure

    2013-01-01T23:59:59.000Z

    Considering the grid manager's point of view, needs in terms of prediction of intermittent energy like the photovoltaic resource can be distinguished according to the considered horizon: following days (d+1, d+2 and d+3), next day by hourly step (h+24), next hour (h+1) and next few minutes (m+5 e.g.). Through this work, we have identified methodologies using time series models for the prediction horizon of global radiation and photovoltaic power. What we present here is a comparison of different predictors developed and tested to propose a hierarchy. For horizons d+1 and h+1, without advanced ad hoc time series pre-processing (stationarity) we find it is not easy to differentiate between autoregressive moving average (ARMA) and multilayer perceptron (MLP). However we observed that using exogenous variables improves significantly the results for MLP . We have shown that the MLP were more adapted for horizons h+24 and m+5. In summary, our results are complementary and improve the existing prediction techniques ...

  9. HORIZON SENSING

    SciTech Connect (OSTI)

    Larry G. Stolarczyk

    2003-03-18T23:59:59.000Z

    With the aid of a DOE grant (No. DE-FC26-01NT41050), Stolar Research Corporation (Stolar) developed the Horizon Sensor (HS) to distinguish between the different layers of a coal seam. Mounted on mining machine cutter drums, HS units can detect or sense the horizon between the coal seam and the roof and floor rock, providing the opportunity to accurately mine the section of the seam most desired. HS also enables accurate cutting of minimum height if that is the operator's objective. Often when cutting is done out-of-seam, the head-positioning function facilitates a fixed mining height to minimize dilution. With this technology, miners can still be at a remote location, yet cut only the clean coal, resulting in a much more efficient overall process. The objectives of this project were to demonstrate the feasibility of horizon sensing on mining machines and demonstrate that Horizon Sensing can allow coal to be cut cleaner and more efficiently. Stolar's primary goal was to develop the Horizon Sensor (HS) into an enabling technology for full or partial automation or ''agile mining''. This technical innovation (R&D 100 Award Winner) is quickly demonstrating improvements in productivity and miner safety at several prominent coal mines in the United States. In addition, the HS system can enable the cutting of cleaner coal. Stolar has driven the HS program on the philosophy that cutting cleaner coal means burning cleaner coal. The sensor, located inches from the cutting bits, is based upon the physics principles of a Resonant Microstrip Patch Antenna (RMPA). When it is in proximity of the rock-coal interface, the RMPA impedance varies depending on the thickness of uncut coal. The impedance is measured by the computer-controlled electronics and then sent by radio waves to the mining machine. The worker at the machine can read the data via a Graphical User Interface, displaying a color-coded image of the coal being cut, and direct the machine appropriately. The Horizon Sensor program began development in 1998 and experienced three major design phases. The final version, termed HS-3, was commissioned in 2000 with the assistance of the DOE-Mining Industry of the Future program, commercialized in 2002, and has been used 14 times in 12 different mines within the United States. The Horizon Sensor has applications in both underground and surface mining operations. This technology is primarily used in the coal industry, but is also used to mine trona and potash. All horizon sensor components have Mine Safety and Health Administration (MSHA) (United States) and IEC (International) certification. Horizon Sensing saves energy by maximizing cutting efficiency, cutting only desired material. This desired material is cleaner fuel, therefore reducing pollutants to the atmosphere when burned and burning more efficiently. Extracting only desired material increases productivity by reducing or eliminating the cleaning step after extraction. Additionally, this technology allows for deeper mining, resulting in more material gained from one location. The remote sensing tool allows workers to operate the machinery away from the hazards of cutting coal, including noise, breathing dust and gases, and coal and rock splintering and outbursts. The HS program has primarily revolved around the development of the technology. However, the end goal of the program has always been the commercialization of the technology and only within the last 2 years of the program has this goal been realized. Real-time horizon sensing on mining machines is becoming an industry tool. Detailed monitoring of system function, user experience, and mining benefits is ongoing.

  10. Analysis of Unconstrained Nonlinear MPC Schemes with Time Varying Control Horizon

    E-Print Network [OSTI]

    Knobloch,Jürgen

    ) has become a well-established method for optimal control of linear and nonlinear systems, see, e state, a finite horizon optimal control problem is solved and the first element (or sometimes also more) of the resulting optimal control sequence is used as input for the next sampling interval(s). This procedure

  11. Mechanics of Isolated Horizons

    E-Print Network [OSTI]

    Abhay Ashtekar; Christopher Beetle; Stephen Fairhurst

    1999-11-04T23:59:59.000Z

    A set of boundary conditions defining an undistorted, non-rotating isolated horizon are specified in general relativity. A space-time representing a black hole which is itself in equilibrium but whose exterior contains radiation admits such a horizon. However, the definition is applicable in a more general context, such as cosmological horizons. Physically motivated, (quasi-)local definitions of the mass and surface gravity of an isolated horizon are introduced and their properties analyzed. Although their definitions do not refer to infinity, these quantities assume their standard values in the static black hole solutions. Finally, using these definitions, the zeroth and first laws of black hole mechanics are established for isolated horizons.

  12. Time Machines with Non-compactly Generated Cauchy Horizons and ``Handy Singularities"

    E-Print Network [OSTI]

    S. V. Krasnikov

    1997-11-12T23:59:59.000Z

    The use of "handy singularities" (i.e. singularities similar to those arising in the Deutch-Politzer space) enables one to avoid (almost) all known difficulties inherent usually to creation of time machines. A simple method is discussed for constructing a variety of such singularities. A few 3-dimensional examples are cited.

  13. Mechanics of Rotating Isolated Horizons

    E-Print Network [OSTI]

    Abhay Ashtekar; Christopher Beetle; Jerzy Lewandowski

    2001-04-11T23:59:59.000Z

    Black hole mechanics was recently extended by replacing the more commonly used event horizons in stationary space-times with isolated horizons in more general space-times (which may admit radiation arbitrarily close to black holes). However, so far the detailed analysis has been restricted to non-rotating black holes (although it incorporated arbitrary distortion, as well as electromagnetic, Yang-Mills and dilatonic charges). We now fill this gap by first introducing the notion of isolated horizon angular momentum and then extending the first law to the rotating case.

  14. Acoustic horizons in nuclear fluids

    E-Print Network [OSTI]

    Niladri Sarkar; Abhik Basu; Jayanta K. Bhattacharjee; Arnab K. Ray

    2014-04-13T23:59:59.000Z

    We consider a hydrodynamic description of the spherically symmetric outward flow of nuclear matter, accommodating dispersion in it as a very weak effect. About the resulting stationary conditions in the flow, we apply an Eulerian scheme to derive a fully nonlinear equation of a time-dependent radial perturbation. In its linearized limit, with no dispersion, this equation implies the static acoustic horizon of an analogue gravity model. We, however, show that time-dependent nonlinear effects destabilize the static horizon. We also model the perturbation as a high-frequency travelling wave, and perform a {\\it WKB} analysis, in which the effect of weak dispersion is studied iteratively. We show that even arbitrarily small values of dispersion make the horizon fully opaque to any acoustic disturbance propagating against the bulk flow, with the amplitude and the energy flux of the radial perturbation undergoing a discontinuity at the horizon, and decaying exponentially just outside it.

  15. Horizon dynamics of distorted rotating black holes

    E-Print Network [OSTI]

    Tony Chu; Harald P. Pfeiffer; Michael I. Cohen

    2011-04-28T23:59:59.000Z

    We present numerical simulations of a Kerr black hole perturbed by a pulse of ingoing gravitational radiation. For strong perturbations we find up to five concentric marginally outer trapped surfaces. These trapped surfaces appear and disappear in pairs, so that the total number of such surfaces at any given time is odd. The world tubes traced out by the marginally outer trapped surfaces are found to be spacelike during the highly dynamical regime, approaching a null hypersurface at early and late times. We analyze the structure of these marginally trapped tubes in the context of the dynamical horizon formalism, computing the expansion of outgoing and incoming null geodesics, as well as evaluating the dynamical horizon flux law and the angular momentum flux law. Finally, we compute the event horizon. The event horizon is well-behaved and approaches the apparent horizon before and after the highly dynamical regime. No new generators enter the event horizon during the simulation.

  16. Scanning the Conservation Horizon

    E-Print Network [OSTI]

    Scanning the Conservation Horizon A Guide to Climate Change Vulnerability Assessment #12;Scanning.A. Stein, and N.A. Edelson, editors. 2011. Scanning the Conservation Horizon: A Guide to Climate Change.S. Geological Survey Fundamental Science Practices. Scanning the Conservation Horizon is available online at

  17. Horizon Health EAP Services

    E-Print Network [OSTI]

    Yates, Andrew

    /09) HorizonCareLinkSM ­ All the help you need online Horizon Health EAP also provides services through counselors- Child care or elder care services- Pet care and veterinarians- Adoption resources- Health clubsHorizon Health EAP Services Employee Assistance Program with Telephone and 3 Face

  18. Deepwater Horizon Situation Report #5

    SciTech Connect (OSTI)

    none,

    2010-06-10T23:59:59.000Z

    At approximately 11:00 pm EDT April 20, 2010 an explosion occurred aboard the Deepwater Horizon mobile offshore drilling unit (MODU) located 52 miles Southeast of Venice, LA and 130 miles southeast of New Orleans, LA. The MODU was drilling an exploratory well and was not producing oil at the time of the incident. The Deepwater Horizon MODU sank 1,500 feet northwest of the well site. Detailed information on response and recovery operations can be found at: http://www.deepwaterhorizonresponse.com/go/site/2931/

  19. The New Horizons Spacecraft

    E-Print Network [OSTI]

    Fountain, Glen H; Hersman, Christopher B; Herder, Timothy S; Coughlin, Thomas B; Gibson, William C; Clancy, Deborah A; DeBoy, Christopher C; Hill, T Adrian; Kinnison, James D; Mehoke, Douglas S; Ottman, Geffrey K; Rogers, Gabe D; Stern, S Alan; Stratton, James M; Vernon, Steven R; Williams, Stephen P

    2007-01-01T23:59:59.000Z

    The New Horizons spacecraft was launched on 19 January 2006. The spacecraft was designed to provide a platform for seven instruments that will collect and return data from Pluto in 2015. The design drew on heritage from previous missions developed at The Johns Hopkins University Applied Physics Laboratory (APL) and other missions such as Ulysses. The trajectory design imposed constraints on mass and structural strength to meet the high launch acceleration needed to reach the Pluto system prior to the year 2020. The spacecraft subsystems were designed to meet tight mass and power allocations, yet provide the necessary control and data handling finesse to support data collection and return when the one-way light time during the Pluto flyby is 4.5 hours. Missions to the outer solar system require a radioisotope thermoelectric generator (RTG) to supply electrical power, and a single RTG is used by New Horizons. To accommodate this constraint, the spacecraft electronics were designed to operate on less than 200 W....

  20. The New Horizons Spacecraft

    E-Print Network [OSTI]

    Glen H. Fountain; David Y. Kusnierkiewicz; Christopher B. Hersman; Timothy S. Herder; Thomas B. Coughlin; William C. Gibson; Deborah A. Clancy; Christopher C. DeBoy; T. Adrian Hill; James D. Kinnison; Douglas S. Mehoke; Geffrey K. Ottman; Gabe D. Rogers; S. Alan Stern; James M. Stratton; Steven R. Vernon; Stephen P. Williams

    2007-09-26T23:59:59.000Z

    The New Horizons spacecraft was launched on 19 January 2006. The spacecraft was designed to provide a platform for seven instruments that will collect and return data from Pluto in 2015. The design drew on heritage from previous missions developed at The Johns Hopkins University Applied Physics Laboratory (APL) and other missions such as Ulysses. The trajectory design imposed constraints on mass and structural strength to meet the high launch acceleration needed to reach the Pluto system prior to the year 2020. The spacecraft subsystems were designed to meet tight mass and power allocations, yet provide the necessary control and data handling finesse to support data collection and return when the one-way light time during the Pluto flyby is 4.5 hours. Missions to the outer solar system require a radioisotope thermoelectric generator (RTG) to supply electrical power, and a single RTG is used by New Horizons. To accommodate this constraint, the spacecraft electronics were designed to operate on less than 200 W. The spacecraft system architecture provides sufficient redundancy to provide a probability of mission success of greater than 0.85, even with a mission duration of over 10 years. The spacecraft is now on its way to Pluto, with an arrival date of 14 July 2015. Initial inflight tests have verified that the spacecraft will meet the design requirements.

  1. Apparent Horizons in Vacuum Robinson-Trautman Spacetimes

    E-Print Network [OSTI]

    E. W. M. Chow; A. W. -C. Lun

    1995-04-01T23:59:59.000Z

    Vacuum asymptotically flat Robinson-Trautman spacetimes are a well known class of spacetimes exhibiting outgoing gravitational radiation. In this paper we describe a method of locating the past apparent horizon in these spacetimes, and discuss the properties of the horizon. We show that the past apparent horizon is non-timelike, and that its surface area is a decreasing function of the retarded time. A numerical simulation of the apparent horizon is also discussed.

  2. Black Hole Initial Data with a Horizon of Prescribed Geometry

    E-Print Network [OSTI]

    Brian Smith

    2007-10-04T23:59:59.000Z

    The purpose of this work is to construct asymptotically flat, time symmetric initial data with an apparent horizon of prescribed intrinsic geometry. To do this, we use the parabolic partial differential equation for prescribing scalar curvature. In this equation the horizon geometry is contained within the freely specifiable part of the metric. This contrasts with the conformal method in which the geometry of the horizon can only be specified up to a conformal factor.

  3. Online Horizon Selection in Receding Horizon Temporal Logic Planning

    E-Print Network [OSTI]

    Murray, Richard M.

    - ative, short horizon solutions, using the currently observed state to compute a control strategy synthesis for temporal logic, but have thus far been limited by pursuing a single sequence of short horizon problems to the current goal. We propose a receding horizon algorithm for reactive synthesis that au

  4. Investors' horizon and stock prices

    E-Print Network [OSTI]

    Parsa, Sahar

    2011-01-01T23:59:59.000Z

    This dissertation consists of three essays on the relation between investors' trading horizon and stock prices. The first chapter explores the theoretical relation between the horizon of traders and the negative externality ...

  5. Isolated Horizons: A Generalization of Black Hole Mechanics

    E-Print Network [OSTI]

    Abhay Ashtekar; Christopher Beetle; Stephen Fairhurst

    1998-12-18T23:59:59.000Z

    A set of boundary conditions defining a non-rotating isolated horizon are given in Einstein-Maxwell theory. A space-time representing a black hole which itself is in equilibrium but whose exterior contains radiation admits such a horizon . Physically motivated, (quasi-)local definitions of the mass and surface gravity of an isolated horizon are introduced. Although these definitions do not refer to infinity, the quantities assume their standard values in Reissner-Nordstrom solutions. Finally, using these definitions, the zeroth and first laws of black hole mechanics are established for isolated horizons.

  6. Spacetimes containing slowly evolving horizons

    E-Print Network [OSTI]

    W. Kavanagh; I. Booth

    2006-08-29T23:59:59.000Z

    Slowly evolving horizons are trapping horizons that are "almost" isolated horizons. This paper reviews their definition and discusses several spacetimes containing such structures. These include certain Vaidya and Tolman-Bondi solutions as well as (perturbatively) tidally distorted black holes. Taking into account the associated mass scales, they also suggest that slowly evolving horizons are the norm rather than the exception in astrophysical processes that involve stellar-scale black holes.

  7. Incidents of Security Concern

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

    2004-03-17T23:59:59.000Z

    Sets forth requirements for the DOE Incidents of Security Concern Program, including timely identification and notification of, response to, inquiry into, reporting of, and closure actions for incidents of security concern. Cancels Chapter VII of DOE O 470.1; DOE N 471.3; and Chapter IV of DOE M 471.2-1B (Note: Paragraphs 1 and 2 of Chapter III remain in effect.) Canceled by DOE O 470.4.

  8. Can an evolving Universe host a static event horizon?

    E-Print Network [OSTI]

    Aharon Davidson; Shimon Rubin; Yosef Verbin

    2012-11-09T23:59:59.000Z

    We prove the existence of general relativistic perfect fluid black hole solutions, and demonstrate the phenomenon for the $P=w\\rho$ class of equations of state. While admitting a local time-like Killing vector on the event horizon itself, the various black hole configurations are necessarily time dependent (thereby avoiding a well known no-go theorem) away from the horizon. Consistently, Hawking's imaginary time periodicity is globally manifest on the entire spacetime manifold.

  9. Entropy of Isolated Horizons revisited

    E-Print Network [OSTI]

    Rudranil Basu; Romesh K. Kaul; Parthasarathi Majumdar

    2009-07-29T23:59:59.000Z

    The decade-old formulation of the isolated horizon classically and within loop quantum gravity, and the extraction of the microcanonical entropy of such a horizon from this formulation, is reviewed, in view of recent renewed interest. There are two main approaches to this problem: one employs an SU(2) Chern-Simons theory describing the isolated horizon degrees of freedom, while the other uses a reduced U(1) Chern-Simons theory obtained from the SU(2) theory, with appropriate constraints imposed on the spectrum of boundary states `living' on the horizon. It is shown that both these ways lead to the same infinite series asymptotic in horizon area for the microcanonical entropy of an isolated horizon. The leading area term is followed by an unambiguous correction term logarithmic in area with a coefficient $-\\frac32$, with subleading corrections dropping off as inverse powers of the area.

  10. Entropy of isolated horizons revisited

    SciTech Connect (OSTI)

    Basu, Rudranil; Kaul, Romesh K.; Majumdar, Parthasarathi [SN Bose National Centre for Basic Sciences, Kolkata 700 098 (India); Institute of Mathematical Sciences, Chennai 600 113 (India); Saha Institute of Nuclear Physics, Kolkata 700 064 (India)

    2010-07-15T23:59:59.000Z

    The decade-old formulation of the isolated horizon classically and within loop quantum gravity, and the extraction of the microcanonical entropy of such a horizon from this formulation, is reviewed, in view of recent renewed interest. There are two main approaches to this problem: one employs an SU(2) Chern-Simons theory describing the isolated horizon degrees of freedom, while the other uses a reduced U(1) Chern-Simons theory obtained from the SU(2) theory, with appropriate constraints imposed on the spectrum of boundary states ''living'' on the horizon. It is shown that both these ways lead to the same infinite series asymptotic in the horizon area for the microcanonical entropy of an isolated horizon. The leading area term is followed by an unambiguous correction term logarithmic in area with a coefficient -(3/2), with subleading corrections dropping off as inverse powers of the area.

  11. Optical geometry across the horizon

    E-Print Network [OSTI]

    Rickard Jonsson

    2007-08-19T23:59:59.000Z

    In a companion paper (Jonsson and Westman, Class. Quantum Grav. 23 (2006) 61), a generalization of optical geometry, assuming a non-shearing reference congruence, is discussed. Here we illustrate that this formalism can be applied to a finite four-volume of any spherically symmetric spacetime. In particular we apply the formalism, using a non-static reference congruence, to do optical geometry across the horizon of a static black hole. While the resulting geometry in principle is time dependent, we can choose the reference congruence in such a manner that an embedding of the geometry always looks the same. Relative to the embedded geometry the reference points are then moving. We discuss the motion of photons, inertial forces and gyroscope precession in this framework.

  12. Thermodynamics of apparent horizon and modified Friedman equations

    E-Print Network [OSTI]

    Ahmad Sheykhi

    2010-12-02T23:59:59.000Z

    Starting from the first law of thermodynamics, $dE=T_hdS_h+WdV$, at apparent horizon of a FRW universe, and assuming that the associated entropy with apparent horizon has a quantum corrected relation, $S=\\frac{A}{4G}-\\alpha \\ln \\frac{A}{4G}+\\beta \\frac{4G}{A}$, we derive modified Friedmann equations describing the dynamics of the universe with any spatial curvature. We also examine the time evolution of the total entropy including the quantum corrected entropy associated with the apparent horizon together with the matter field entropy inside the apparent horizon. Our study shows that, with the local equilibrium assumption, the generalized second law of thermodynamics is fulfilled in a region enclosed by the apparent horizon.

  13. Near Horizon Structure of Extremal Vanishing Horizon Black Holes

    E-Print Network [OSTI]

    Sadeghian, S; Vahidinia, M H; Yavartanoo, H

    2015-01-01T23:59:59.000Z

    We study the near horizon structure of Extremal Vanishing Horizon (EVH) black holes, extremal black holes with vanishing horizon area with a vanishing one-cycle on the horizon. We construct the most general near horizon EVH and near-EVH ansatz for the metric and other fields, like dilaton and gauge fields which may be present in the theory. We prove that (1) the near horizon EVH geometry for generic gravity theory in generic dimension has a three dimensional maximally symmetric subspace; (2) if the matter fields of the theory satisfy strong energy condition either this 3d part is AdS$_3$, or the solution is a direct product of a locally 3d flat space and a $d-3$ dimensional part; (3) these results extend to the near horizon geometry of near-EVH black holes, for which the AdS$_3$ part is replaced with BTZ geometry. We present some specific near horizon EVH geometries in 3, 4 and 5 dimensions for which there is a classification. We also briefly discuss implications of these generic results for generic (gauged) ...

  14. Offset-free Receding Horizon Control of Constrained Linear Systems subject to

    E-Print Network [OSTI]

    Cambridge, University of

    Offset-free Receding Horizon Control of Constrained Linear Systems subject to Time/F-INFENG/TR.468 November 4, 2003 #12;Offset-free Receding Horizon Control of Constrained Linear Systems subject and offset-free control of con- strained, linear time-invariant systems in the presence of time

  15. Falling through the black hole horizon

    E-Print Network [OSTI]

    Brustein, Ram

    2015-01-01T23:59:59.000Z

    We consider the fate of a small classical object, a "stick", as it falls through the horizon of a large black hole (BH). Classically, the equivalence principle dictates that the stick is affected by small tidal forces, and Hawking's quantum-mechanical model of BH evaporation makes essentially the same prediction. If, on the other hand, the BH horizon is surrounded by a "firewall", the stick will be consumed as it falls through. We have recently extended Hawking's model by taking into account the quantum fluctuations of the geometry and the classical back-reaction of the emitted particles. Here, we calculate the strain exerted on the falling stick for our model. The strain depends on the near-horizon state of the Hawking pairs. We find that, after the Page time when the state of the pairs deviates significantly from maximal entanglement (as required by unitarity), the induced strain in our semiclassical model is still parametrically small. This is because the number of the disentangled pairs is parametrically ...

  16. Dual-Sampling-Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation and

    E-Print Network [OSTI]

    Dual-Sampling-Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation horizon control scheme for a class of linear, continuous-time plants with strict input saturation horizon control, robust, fast sampling, stability, linear sys- tems, input constraints 1 Introduction

  17. Iteratively extending time horizon reinforcement learning

    E-Print Network [OSTI]

    Wehenkel, Louis

    - Belgium y Research Fellow FNRS, #3; Postdoctoral Researcher FNRS Abstract. Reinforcement learning aims

  18. Generic isolated horizons in loop quantum gravity

    E-Print Network [OSTI]

    Christopher Beetle; Jonathan Engle

    2010-07-16T23:59:59.000Z

    Isolated horizons model equilibrium states of classical black holes. A detailed quantization, starting from a classical phase space restricted to spherically symmetric horizons, exists in the literature and has since been extended to axisymmetry. This paper extends the quantum theory to horizons of arbitrary shape. Surprisingly, the Hilbert space obtained by quantizing the full phase space of \\textit{all} generic horizons with a fixed area is identical to that originally found in spherical symmetry. The entropy of a large horizon remains one quarter its area, with the Barbero-Immirzi parameter retaining its value from symmetric analyses. These results suggest a reinterpretation of the intrinsic quantum geometry of the horizon surface.

  19. Black hole initial data with a horizon of prescribed intrinsic and extrinsic geometry

    E-Print Network [OSTI]

    Brian Smith

    2010-06-14T23:59:59.000Z

    The purpose of this work is to construct asymptotically flat, time symmetric initial data with an apparent horizon of prescribed intrinsic and extrinsic geometry. To do this, we use the parabolic partial differential equation for prescribing scalar curvature. In this equation the horizon geometry is contained within the freely specifiable part of the metric. This contrasts with the conformal method in which the geometry of the horizon can only be specified up to a conformal factor.

  20. Inflationary Axion Cosmology Beyond Our Horizon

    E-Print Network [OSTI]

    David B. Kaplan; Ann E. Nelson

    2008-09-07T23:59:59.000Z

    In theories of axion dark matter with large axion decay constant, temperature variations in the CMB are extremely sensitive to perturbations in the initial axion field, allowing one to place a lower bound on the total amount of inflation. The most stringent bound comes from axion strings, which for axion decay constant f=10^17 GeV would currently be observable at a distance of 6 x 10^16 light-years, nearly ten million times as far away as our horizon.

  1. NIF featured on BBC "Horizon"

    ScienceCinema (OSTI)

    Brian Cox

    2010-09-01T23:59:59.000Z

    The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

  2. Directly observing entropy accumulate on the horizon and holography

    E-Print Network [OSTI]

    Ariel Edery; Hugues Beauchesne

    2012-05-15T23:59:59.000Z

    Recent numerical simulations of gravitational collapse show that there exists a special foliation of the spacetime where matter and entropy accumulate directly on the inside of the horizon surface. In this foliation, the time coincides with the proper time of the asymptotic static observer (ASO) and for spherical symmetry, this corresponds to isotropic coordinates. In this gauge, the three-volume in the interior shrinks to zero and only the horizon area remains at the end of collapse. In a different foliation, matter and entropy accumulate in the volume. The entropy is however independent of the foliation. Black hole holography is therefore a mapping from an arbitrary foliation, where information resides in the volume, to the special ASO frame, where it resides directly on the horizon surface.

  3. Local symmetries of non-expanding horizons

    E-Print Network [OSTI]

    Rudranil Basu; Ayan Chatterjee; Amit Ghosh

    2010-04-21T23:59:59.000Z

    Local symmetries of a non-expanding horizon has been investigated in the 1st order formulation of gravity. When applied to a spherically symmetric isolated horizon only a U(1) subgroup of the Lorentz group survives as residual local symmetry that one can make use of in constructing an effective theory on the horizon.

  4. Spacetime Foam Model of the Schwarzschild Horizon

    E-Print Network [OSTI]

    Jarmo Makela; Ari Peltola

    2004-03-19T23:59:59.000Z

    We consider a spacetime foam model of the Schwarzschild horizon, where the horizon consists of Planck size black holes. According to our model the entropy of the Schwarzschild black hole is proportional to the area of its event horizon. It is possible to express geometrical arguments to the effect that the constant of proportionality is, in natural units, equal to one quarter.

  5. Deepwater Horizon Disaster Professor Satish Nagarajaiah

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    Systems Research @ Rice Source: MMS and BP #12;April 20, 2010 At approximately 10 pm Horizon Rig disaster;Collapse / Oil Spill Offshore and Marine Systems Research @ Rice Source: NYT/AP/flickr #12;Horizon BeforeDeepwater Horizon Disaster Professor Satish Nagarajaiah Dept. of Civil & Env. Eng. , Dept

  6. Horizons cannot save the Landscape

    E-Print Network [OSTI]

    Iosif Bena; Alex Buchel; Oscar J. C. Dias

    2012-12-20T23:59:59.000Z

    Solutions with anti-D3 branes in a Klebanov-Strassler geometry with positive charge dissolved in fluxes have a certain singularity corresponding to a diverging energy density of the RR and NS-NS three-form fluxes. There are many hopes and arguments for and against this singularity, and we attempt to settle the issue by examining whether this singularity can be cloaked by a regular event horizon. This is equivalent to the existence of asymptotically Klebanov-Tseytlin or Klebanov-Strassler black holes whose charge measured at the horizon has the opposite sign to the asymptotic charge. We find that no such KT solution exists. Furthermore, for a large class of KS black holes we considered, the charge at the horizon must also have the same sign as the asymptotic charge, and is completely determined by the temperature, the number of fractional branes and the gaugino masses of the dual gauge theory. Our result suggests that antibrane singularities in backgrounds with charge in the fluxes are unphysical, which in turn raises the question as to whether antibranes can be used to uplift AdS vacua to deSitter ones. Our results also point out to a possible instability mechanism for the antibranes.

  7. Spacetime near isolated and dynamical trapping horizons

    E-Print Network [OSTI]

    Ivan Booth

    2014-06-02T23:59:59.000Z

    We study the near-horizon spacetime for isolated and dynamical trapping horizons (equivalently marginally outer trapped tubes). The metric is expanded relative to an ingoing Gaussian null coordinate and the terms of that expansion are explicitly calculated to second order. For the spacelike case, knowledge of the intrinsic and extrinsic geometry of the (dynamical) horizon is sufficient to determine the near-horizon spacetime, while for the null case (an isolated horizon) more information is needed. In both cases spacetime is allowed to be of arbitrary dimension and the formalism accomodates both general relativity as well as more general field equations. The formalism is demonstrated for two applications. First, spacetime is considered near an isolated horizon and the construction is both checked against the Kerr-Newman solution and compared to the well-known near-horizon limit for stationary extremal black hole spacetimes. Second, spacetime is examined in the vicinity of a slowly evolving horizon and it is demonstrated that there is always an event horizon candidate in this region. The geometry and other properties of this null surface match those of the slowly evolving horizon to leading order and in this approximation the candidate evolves in a locally determined way. This generalizes known results for Vaidya as well as certain spacetimes known from studies of the fluid-gravity correspondence.

  8. Variable horizon in a peridynamic medium.

    SciTech Connect (OSTI)

    Silling, Stewart A.; Littlewood, David John; Seleson, Pablo

    2014-10-01T23:59:59.000Z

    A notion of material homogeneity is proposed for peridynamic bodies with vari- able horizon but constant bulk properties. A relation is derived that scales the force state according to the position-dependent horizon while keeping the bulk properties un- changed. Using this scaling relation, if the horizon depends on position, artifacts called ghost forces may arise in a body under homogeneous deformation. These artifacts de- pend on the second derivative of horizon and can be reduced by use of a modified equilibrium equation using a new quantity called the partial stress . Bodies with piece- wise constant horizon can be modeled without ghost forces by using a technique called a splice between the regions. As a limiting case of zero horizon, both partial stress and splice techniques can be used to achieve local-nonlocal coupling. Computational examples, including dynamic fracture in a one-dimensional model with local-nonlocal coupling, illustrate the methods.

  9. Apparent horizon in fluid-gravity duality

    SciTech Connect (OSTI)

    Booth, Ivan; Heller, Michal P.; Plewa, Grzegorz; Spalinski, Michal [Department of Mathematics and Statistics, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, A1C 5S7 (Canada); Instituut voor Theoretische Fysica, Universiteit van Amsterdam, Science Park 904, 1090 GL Amsterdam (Netherlands); Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw (Poland); Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw (Poland) and Physics Department, University of Bialystok, 15-424 Bialystok (Poland)

    2011-05-15T23:59:59.000Z

    This article develops a computational framework for determining the location of boundary-covariant apparent horizons in the geometry of conformal fluid-gravity duality in arbitrary dimensions. In particular, it is shown up to second order and conjectured to hold to all orders in the gradient expansion that there is a unique apparent horizon which is covariantly expressible in terms of fluid velocity, temperature, and boundary metric. This leads to the first explicit example of an entropy current defined by an apparent horizon and opens the possibility that in the near-equilibrium regime there is preferred foliation of apparent horizons for black holes in asymptotically anti-de Sitter spacetimes.

  10. A concrete anti-de Sitter black hole with dynamical horizon having toroidal cross-sections and its characteristics

    E-Print Network [OSTI]

    Pouria Dadras; J. T. Firouzjaee; Reza Mansouri

    2012-11-12T23:59:59.000Z

    We propose a special solution of Einstein equations in the general Vaidya form representing a dynamical black hole having horizon cross-sections with toroidal topology. The concrete model enables us to study for the first time dynamical horizons with toroidal topology, its area law, and the question of matter flux inside the horizon, without using a cut-and-paste technology to construct the solution.

  11. Two physical characteristics of numerical apparent horizons

    E-Print Network [OSTI]

    Ivan Booth

    2007-12-20T23:59:59.000Z

    This article translates some recent results on quasilocal horizons into the language of $(3+1)$ general relativity so as to make them more useful to numerical relativists. In particular quantities are described which characterize how quickly an apparent horizon is evolving and how close it is to either equilibrium or extremality.

  12. Microsoft PowerPoint - Deepwater Horizon Containment - 30 JUN...

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

    Deepwater Horizon Containment - 30 JUN.ppt Microsoft PowerPoint - Deepwater Horizon Containment - 30 JUN.ppt Microsoft PowerPoint - Deepwater Horizon Containment - 30 JUN.ppt More...

  13. Deepwater Horizon Oil Spill; Draft Programmatic and Phase III Early

    E-Print Network [OSTI]

    Deepwater Horizon Oil Spill; Draft Programmatic and Phase III Early Restoration Plan of the Deepwater Horizon oil spill. The restoration alternatives are comprised of early restoration project types Addressing Injuries Resulting from the Deepwater Horizon Oil Spill (Framework Agreement). Criteria

  14. A study of different horizons in inhomogeneous LTB cosmological model

    E-Print Network [OSTI]

    Subenoy Chakraborty; Subhajit Saha

    2015-03-04T23:59:59.000Z

    This work deals with a detailed study of the dynamics of the apparent, event and particle horizons in the background of the inhomogeneous LTB spacetime. The comparative study among these horizons shows a distinct character for apparent horizon compared to the other horizons. The apparent horizon will be a trapping horizon if its acceleration is positive. The Kodama vector is also defined and its causal character is found to be similar to that in the FRW model.

  15. Green Investment Horizons: Effects of Policy on the Market for...

    Open Energy Info (EERE)

    Horizons: Effects of Policy on the Market for Building Energy Efficiency Technologies Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Green Investment Horizons: Effects...

  16. New Horizons Mission Powered by Space Radioisotope Power Systems...

    Energy Savers [EERE]

    New Horizons Mission Powered by Space Radioisotope Power Systems New Horizons Mission Powered by Space Radioisotope Power Systems January 30, 2008 - 6:47pm Addthis Artist's concept...

  17. DualSamplingRate Moving Horizon Control of a Class of Linear Systems with Input Saturation and Plant Uncertainty --

    E-Print Network [OSTI]

    Dual­Sampling­Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation­sampling­rate moving horizon control scheme for a class of linear, continuous­time plants with strict input saturation, it is not computed by a simple linear feedback law, but as a solution of an optimal control problem. As a result

  18. Incidents of Security Concern

    SciTech Connect (OSTI)

    Atencio, Julian J.

    2014-05-01T23:59:59.000Z

    This presentation addresses incidents of security concern and an incident program for addressing them. It addresses the phases of an inquiry, and it divides incidents into categories based on severity and interest types based on whether security, management, or procedural interests are involved. A few scenarios are then analyzed according to these breakdowns.

  19. Locating Boosted Kerr and Schwarzschild Apparent Horizons

    E-Print Network [OSTI]

    Mijan F. Huq; Matthew W. Choptuik; Richard A. Matzner

    2000-02-22T23:59:59.000Z

    We describe a finite-difference method for locating apparent horizons and illustrate its capabilities on boosted Kerr and Schwarzschild black holes. Our model spacetime is given by the Kerr-Schild metric. We apply a Lorentz boost to this spacetime metric and then carry out a 3+1 decomposition. The result is a slicing of Kerr/Schwarzschild in which the black hole is propagated and Lorentz contracted. We show that our method can locate distorted apparent horizons efficiently and accurately.

  20. Multi-horizon stochastic programming

    E-Print Network [OSTI]

    2013-08-26T23:59:59.000Z

    Aug 26, 2013 ... different time scales: while planning and building the infrastructure involves strate

  1. Vacuum non-expanding horizons and shear-free null geodesic congruences

    E-Print Network [OSTI]

    T. M. Adamo; E. T. Newman

    2009-08-05T23:59:59.000Z

    We investigate the geometry of a particular class of null surfaces in space-time called vacuum Non-Expanding Horizons (NEHs). Using the spin-coefficient equation, we provide a complete description of the horizon geometry, as well as fixing a canonical choice of null tetrad and coordinates on a NEH. By looking for particular classes of null geodesic congruences which live exterior to NEHs but have the special property that their shear vanishes at the intersection with the horizon, a good cut formalism for NEHs is developed which closely mirrors asymptotic theory. In particular, we show that such null geodesic congruences are generated by arbitrary choice of a complex world-line in a complex four dimensional space, each such choice induces a CR structure on the horizon, and a particular world-line (and hence CR structure) may be chosen by transforming to a privileged tetrad frame.

  2. Tunneling into black hole, escape from black hole, reflection from horizon and pair creation

    E-Print Network [OSTI]

    V. V. Flambaum

    2004-08-05T23:59:59.000Z

    Within classical general relativity, a particle cannot reach the horizon of a black hole during a finite time, in the reference frame of an external observer; a particle inside cannot escape from a black hole; and the horizon does not produce any reflection. We argue that these processes may possibly be allowed in the quantum world. It is known that quantum mechanics allows pair creation at the horizon (one particle inside, another particle outside) and Hawking radiation. One can extend this idea to propose other processes. Tunneling of an external particle inside black hole may be produced by the creation of a pair at the horizon, followed by the annihilation of one created particle with the initial particle outside, with the other created particle appearing inside. Escape of a particle from a black hole may result from the creation of a pair, followed by the annihilation of one created particle with the particle inside, with the other created particle appearing outside. The escape may allow the transfer of information to the outside.Finally, the reflection of an external particle from the horizon may be modelled by a combination of the two processes presented above. The relationship between these "pair creation-annihilation'' mechanisms and the "horizon tunneling" calculations [1-5] is discussed.

  3. Submesoscale dispersion in the vicinity of the Deepwater Horizon spill

    E-Print Network [OSTI]

    Poje, Andrew C; Lipphardt,, Bruce; Haus, Brian K; Ryan, Edward H; Haza, Angelique C; Reniers, A J H M; Olascoaga, Josefina; Novelli, Guillaume; Beron-Vera, Francisco J; Chen, Shuyi; Mariano, Arthur J; Jacobs, Gregg; Hogan, Pat; Coelho, Emanuel; Kirwan,, A D; Huntley, Helga; Griffa, Annalisa

    2014-01-01T23:59:59.000Z

    Reliable forecasts for the dispersion of oceanic contamination are important for coastal ecosystems, society and the economy as evidenced by the Deepwater Horizon oil spill in the Gulf of Mexico in 2010 and the Fukushima nuclear plant incident in the Pacific Ocean in 2011. Accurate prediction of pollutant pathways and concentrations at the ocean surface requires understanding ocean dynamics over a broad range of spatial scales. Fundamental questions concerning the structure of the velocity field at the submesoscales (100 meters to tens of kilometers, hours to days) remain unresolved due to a lack of synoptic measurements at these scales. \\textcolor{black} {Using high-frequency position data provided by the near-simultaneous release of hundreds of accurately tracked surface drifters, we study the structure of submesoscale surface velocity fluctuations in the Northern Gulf Mexico. Observed two-point statistics confirm the validity of classic turbulence scaling laws at 200m$-$50km scales and clearly indicate tha...

  4. Revisiting Gribov's Copies Inside The Horizon

    E-Print Network [OSTI]

    R. R. Landim; V. E. R. Lemes; O. S. Ventura; L. C. Q. Vilar

    2014-12-08T23:59:59.000Z

    In this work, we recover the problem of legitimate topologically trivial Gribov copies inside the Gribov horizon. We avoid the reducibility problem which hampered the standard construction of van Baal, and then we are able to build a valid example with spherical symmetry. We also apply the same technique in the presence of a background of a Polyakov instanton in a Euclidian 3D spacetime, in order to study the effect of a non trivial environment in the generation of multiple copies inside the horizon.

  5. Horizon Wind Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to:Pennsylvania: EnergyHopkinsville, Kentucky:HorizonHorizon

  6. Optimal investment on finite horizon with random discrete order flow in illiquid markets

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    both on trading and observation of the assets. For example, in power markets, trading occurs through at any time but trading occurs more frequently near a terminal horizon. The investor can observe and trade the risky asset only at exogenous random times corresponding to the order flow given

  7. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    .S. Department of Energy SunShot Initiative calls for an aggressive reduction in the overall systems costs by 75 year for solar with the U.S. surpassing the 10 GW milestone. While the initial cost reductionswww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Towards Ubiquitous Cost- competitive Solar Power

  8. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    ) but will largely ignore the false alarms about genetically modified foods ("frankenfoods"), thimerosal in vaccineswww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Nanotechnology and Food Safety "Pigs oink, dogsYoung, is likely very prescient when it comes to the subject of nanotechnology and the food supply. Although FDA

  9. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    ,weareseeinganincreasinginvestmentinrenew- able energies, like wind and solar. The development of new technologies leading to a clean energyKellerwasappointedtotheroleofAssociateLaboratoryDirectoratOakRidgeNationalLaboratory(ORNL), on July 1, 2009. On November 1, 2010, a new directorate was formed, Energy and Environmental Scienceswww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES From Environmental Science to Next Generation

  10. Cauchy horizon singularity without mass inflation

    E-Print Network [OSTI]

    P. R. Brady; D. Nunez; S. Sinha

    1992-11-20T23:59:59.000Z

    A perturbed Reissner-Nordstr\\"om-de Sitter solution is used to emphasize the nature of the singularity along the Cauchy horizon of a charged spherically symmetric black hole. For these solutions, conditions may prevail under which the mass function is bounded and yet the curvature scalar $R_{\\alpha\\beta\\gamma\\delta} R^{\\alpha\\beta\\gamma\\delta}$ diverges.

  11. Fiber-optical analogue of the event horizon: Appendices

    E-Print Network [OSTI]

    Thomas G. Philbin; Chris Kuklewicz; Scott Robertson; Stephen Hill; Friedrich Konig; Ulf Leonhardt

    2007-12-13T23:59:59.000Z

    We explain the theory behind our fiber-optical analogue of the event horizon and present the experiment in detail.

  12. Joint Information CenterJoint Information Center Deepwater Horizon Response

    E-Print Network [OSTI]

    when they see the birds that have been impacted by the Deepwa- ter Horizon/BP oil spill. While and it is determined to be within the Deepwater Horizon Oil Spill Re- sponse area, a wildlife response team is notifiedJoint Information CenterJoint Information Center Deepwater Horizon Response Incident Command Post

  13. Fiber-optical analogue of the event horizon

    E-Print Network [OSTI]

    Thomas G. Philbin; Chris Kuklewicz; Scott Robertson; Stephen Hill; Friedrich Konig; Ulf Leonhardt

    2008-02-13T23:59:59.000Z

    The physics at the event horizon resembles the behavior of waves in moving media. Horizons are formed where the local speed of the medium exceeds the wave velocity. We use ultrashort pulses in microstructured optical fibers to demonstrate the formation of an artificial event horizon in optics. We observed a classical optical effect, the blue-shifting of light at a white-hole horizon. We also show by theoretical calculations that such a system is capable of probing the quantum effects of horizons, in particular Hawking radiation.

  14. Overview of the New Horizons Science Payload

    E-Print Network [OSTI]

    H. A. Weaver; W. C. Gibson; M. B. Tapley; L. A. Young; S. A. Stern

    2007-09-26T23:59:59.000Z

    The New Horizons mission was launched on 2006 January 19, and the spacecraft is heading for a flyby encounter with the Pluto system in the summer of 2015. The challenges associated with sending a spacecraft to Pluto in less than 10 years and performing an ambitious suite of scientific investigations at such large heliocentric distances (> 32 AU) are formidable and required the development of lightweight, low power, and highly sensitive instruments. This paper provides an overview of the New Horizons science payload, which is comprised of seven instruments. Alice provides spatially resolved ultraviolet spectroscopy. The Ralph instrument has two components: the Multicolor Visible Imaging Camera (MVIC), which performs panchromatic and color imaging, and the Linear Etalon Imaging Spectral Array (LEISA), which provides near-infrared spectroscopic mapping capabilities. The Radio Experiment (REX) is a component of the New Horizons telecommunications system that provides both occultation and radiometry capabilities. The Long Range Reconnaissance Imager (LORRI) provides high sensitivity, high spatial resolution optical imaging capabilities. The Solar Wind at Pluto (SWAP) instrument measures the density and speed of solar wind particles. The Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) measures energetic protons and CNO ions. The Venetia Burney Student Dust Counter (VB-SDC) is used to record dust particle impacts during the cruise phases of the mission.

  15. The Event Horizon of M87

    E-Print Network [OSTI]

    Avery E. Broderick; Ramesh Narayan; John Kormendy; Eric S. Perlman; Marcia J. Rieke; Sheperd S. Doeleman

    2015-03-12T23:59:59.000Z

    The 6 billion solar mass supermassive black hole at the center of the giant elliptical galaxy M87 powers a relativistic jet. Observations at millimeter wavelengths with the Event Horizon Telescope have localized the emission from the base of this jet to angular scales comparable to the putative black hole horizon. The jet might be powered directly by an accretion disk or by electromagnetic extraction of the rotational energy of the black hole. However, even the latter mechanism requires a confining thick accretion disk to maintain the required magnetic flux near the black hole. Therefore, regardless of the jet mechanism, the observed jet power in M87 implies a certain minimum mass accretion rate. If the central compact object in M87 were not a black hole but had a surface, this accretion would result in considerable thermal near-infrared and optical emission from the surface. Current flux limits on the nucleus of M87 strongly constrain any such surface emission. This rules out the presence of a surface and thereby provides indirect evidence for an event horizon.

  16. The Event Horizon of M87

    E-Print Network [OSTI]

    Avery E. Broderick; Ramesh Narayan; John Kormendy; Eric S. Perlman; Marcia J. Rieke; Sheperd S. Doeleman

    2015-04-05T23:59:59.000Z

    The 6 billion solar mass supermassive black hole at the center of the giant elliptical galaxy M87 powers a relativistic jet. Observations at millimeter wavelengths with the Event Horizon Telescope have localized the emission from the base of this jet to angular scales comparable to the putative black hole horizon. The jet might be powered directly by an accretion disk or by electromagnetic extraction of the rotational energy of the black hole. However, even the latter mechanism requires a confining thick accretion disk to maintain the required magnetic flux near the black hole. Therefore, regardless of the jet mechanism, the observed jet power in M87 implies a certain minimum mass accretion rate. If the central compact object in M87 were not a black hole but had a surface, this accretion would result in considerable thermal near-infrared and optical emission from the surface. Current flux limits on the nucleus of M87 strongly constrain any such surface emission. This rules out the presence of a surface and thereby provides indirect evidence for an event horizon.

  17. Condensation of an ideal gas with intermediate statistics on the horizon

    E-Print Network [OSTI]

    Somayeh Zare; Zahra Raissi; Hosein Mohammadzadeh; Behrouz Mirza

    2012-09-22T23:59:59.000Z

    We consider a boson gas on the stretched horizon of the Schwartzschild and Kerr black holes. It is shown that the gas is in a Bose-Einstein condensed state with the Hawking temperature $T_c=T_H$ if the particle number of the system be equal to the number of quantum bits of space-time $ N \\simeq {A}/{{\\l_{p}}^{2}}$. Entropy of the gas is proportional to the area of the horizon $(A)$ by construction. For a more realistic model of quantum degrees of freedom on the horizon, we should presumably consider interacting bosons (gravitons). An ideal gas with intermediate statistics could be considered as an effective theory for interacting bosons. This analysis shows that we may obtain a correct entropy just by a suitable choice of parameter in the intermediate statistics.

  18. Offset-free Receding Horizon Control of Constrained Linear Gabriele Pannocchia1 Eric C. Kerrigan2

    E-Print Network [OSTI]

    Cambridge, University of

    Offset-free Receding Horizon Control of Constrained Linear Systems Gabriele Pannocchia1 Eric C stability and offset-free control of constrained linear systems in the presence of time-varying setpoints-free controller and computing an appropriate domain of attraction for this controller. The linear (unconstrained

  19. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2015-06-04T23:59:59.000Z

    We consider a general class of black hole solutions of Einstein-Maxwell theory which are holographically dual to CFTs with spatially dependent sources. We show that an averaged DC thermoelectric conductivity matrix can be obtained by solving the forced, linearised, time-independent Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  20. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Donos, Aristomenis

    2015-01-01T23:59:59.000Z

    We consider a general class of black hole solutions of Einstein-Maxwell theory which are holographically dual to CFTs with spatially dependent sources. We show that an averaged DC thermoelectric conductivity matrix can be obtained by solving the forced, linearised, time-independent Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  1. Concerns

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would like submitCollector/Receiver Characterization We use a variety !March

  2. Concerns-

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would like submitCollector/Receiver Characterization We use a variety

  3. Thermoelectric DC conductivities from black hole horizons

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2014-10-14T23:59:59.000Z

    An analytic expression for the DC electrical conductivity in terms of black hole horizon data was recently obtained for a class of holographic black holes exhibiting momentum dissipation. We generalise this result to obtain analogous expressions for the DC thermoelectric and thermal conductivities. We illustrate our results using some holographic Q-lattice black holes as well as for some black holes with linear massless axions, in both $D=4$ and $D=5$ bulk spacetime dimensions, which include both spatially isotropic and anisotropic examples. We show that some recently constructed ground states of holographic Q-lattices, which can be either electrically insulating or metallic, are all thermal insulators.

  4. Turnpike sets in stochastic manufacturing systems with nite time horizon

    E-Print Network [OSTI]

    manu- facturing systems. The main objective is to minimize an expected discounted cost of inventories a given #12;xed demand rate at the minimum cost of inventories and backlogs? A new car model example will increase. The objective is again to determine the production plans so as to minimize the total inventory

  5. Rolling-Horizon Algorithm for Scheduling under Time-Dependent

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    of electricity · When and where to produce a certain grade? · How much to keep in storage? ­ Meet product demands · Electricity pricing & availability · Due dates · Location of event points ­ At demand points ­ At some energy, USA #12;Introduction · Process operations are often subject to energy constraints ­ Heating

  6. ARM: W-Band Scanning ARM Cloud Radar (W-SACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

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

    Widener, Kevin; Nelson, Dan; Bharadwaj, Nitin; Lindenmaier, Iosif [Andrei; Johnson, Karen

    W-Band Scanning ARM Cloud Radar (W-SACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

  7. ARM: X-Band Scanning ARM Cloud Radar (XSACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

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

    Widener, Kevin; Nelson, Dan; Bharadwaj, Nitin; Lindenmaier, Iosif [Andrei; Johnson, Karen

    X-Band Scanning ARM Cloud Radar (XSACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

  8. ARM: Ka-Band Scanning ARM Cloud Radar (KASACR) Hemispherical Sky RHI Scan (6 horizon-to-horizon scans at 30-degree azimuth intervals)

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

    Bharadwaj, Nitin; Widener, Kevin

    Ka-Band Scanning ARM Cloud Radar (KASACR) Hemispherical Sky RHI Scan (6 horizon-to-horizon scans at 30-degree azimuth intervals)

  9. Physical process first law and caustic avoidance for Rindler horizon

    E-Print Network [OSTI]

    Srijit Bhattacharjee; Sudipta Sarkar

    2014-12-03T23:59:59.000Z

    We study the perturbation induced by a slowly rotating massive object as it passes through a Rindler horizon. It is shown that the passage of this object can be approximately modeled as Delta\\,function type tidal distortions hitting the horizon. Further, following the analysis presented by Amsel, Marolf and Virmani related to the issue of the validity of physical process first law, we establish a condition on the size of the object so that this law holds for the Rindler horizon.

  10. Review of “Deepwater Horizon Release Estimate of Rate by PIV”

    SciTech Connect (OSTI)

    Onishi, Yasuo

    2010-06-01T23:59:59.000Z

    The Plume Calculation Team (PCT) conducted high quality work within a very short period of time, in spite of needing to use less than ideal quality videos provided by British Petroleum (BP), especially those made before the cutoff of the riser above the Blow Out Preventer (BOP) on June 3, 2010. There are at least two valid approaches for estimating the oil discharge coming out from the Deepwater Horizon broken pipeline and its riser, using BP videotapes. One method is to estimate the exit velocity directly with the use of the Particle Image Velocimetry (PIV). The second method is to use a buoyant plume analysis to determine the exit velocity. The PCT used both of these methods.

  11. Gribov's horizon and the ghost dressing function

    E-Print Network [OSTI]

    Boucaud, Ph; Yaouanc, A Le; Micheli, J; Pène, O; Rodríguez-Quintero, J

    2009-01-01T23:59:59.000Z

    We study a relation recently derived by K. Kondo at zero momentum between the Zwanziger's horizon function, the ghost dressing function and Kugo's functions $u$ and $w$. We agree with this result as far as bare quantities are considered. However, assuming the validity of the horizon gap equation, we argue that the solution $w(0)=0$ is not acceptable since it would lead to a vanishing renormalised ghost dressing function. On the contrary, when the cut-off goes to infinity, $u(0) \\to \\infty$, $w(0) \\to -\\infty$ such that $u(0)+w(0) \\to -1$. Furthermore $w$ and $u$ are not multiplicatively renormalisable. Relaxing the gap equation allows $w(0)=0$ with $u(0) \\to -1$. In both cases the bare ghost dressing function, $F(0,\\Lambda)$, goes logarithmically to infinity at infinite cut-off. We show that, although the lattice results provide bare results not so different from the $F(0,\\Lambda)=3$ solution, this is an accident due to the fact that the lattice cut-offs lie in the range 1-3 GeV$^{-1}$. We show that the renor...

  12. The Event Horizon of M87

    E-Print Network [OSTI]

    Narayan, Ramesh; Perlman, Eric S; Rieke, Marcia J; Doeleman, Sheperd S

    2015-01-01T23:59:59.000Z

    The 6 billion solar mass supermassive black hole at the center of the giant elliptical galaxy M87 powers a relativistic jet. Observations at millimeter wavelengths with the Event Horizon Telescope have localized the emission from the base of this jet to angular scales comparable to the putative black hole horizon. The jet might be powered directly by an accretion disk or by electromagnetic extraction of the rotational energy of the black hole. However, even the latter mechanism requires a confining thick accretion disk to maintain the required magnetic flux near the black hole. Therefore, regardless of the jet mechanism, the observed jet power in M87 implies a certain minimum mass accretion rate. If the central compact object in M87 were not a black hole but had a surface, this accretion would result in considerable thermal near-infrared and optical emission from the surface. Current flux limits on the nucleus of M87 strongly constrain any such surface emission. This rules out the presence of a surface and th...

  13. Air-Shower Spectroscopy at horizons

    E-Print Network [OSTI]

    D. Fargion

    2005-11-20T23:59:59.000Z

    Horizontal and Upward air-showers are suppressed by deep atmosphere opacity and by the Earth shadows. In such noise-free horizontal and upward directions rare Ultra High Cosmic rays and rarer neutrino induced air-showers may shine, mostly mediated by resonant PeVs interactions in air or by higher energy Tau Air-showers originated by neutrino tau skimming the Earth. At high altitude (mountains, planes, balloons) the air density is so rarefied that nearly all common air-showers might be observed at their maximal growth at a tuned altitude and directions. The arrival angle samples different distances and the corresponding most probable primary cosmic ray energy. The larger and larger distances (between observer and C.R. interaction) make wider and wider the shower area and it enlarge the probability to be observed (up to three order of magnitude more than vertical showers); the observation of a maximal electromagnetic shower development may amplify the signal by two-three order of magnitude (respect suppressed shower at sea level); the peculiar altitude-angle range may disentangle at best the primary cosmic ray energy and composition. Even from existing mountain observatory the up-going air-showers may trace, above the horizons, PeV-EeV high energy cosmic rays and, below the horizons, PeV-EeV neutrino astronomy: their early signals may be captured in already existing gamma telescopes as Magic at Canarie, while facing the Earth edges during (useless) cloudy nights.

  14. Cool horizons lead to information loss

    E-Print Network [OSTI]

    Borun D. Chowdhury

    2013-07-29T23:59:59.000Z

    There are two evidences for information loss during black hole evaporation: (i) a pure state evolves to a mixed state and (ii) the map from the initial state to final state is non-invertible. Any proposed resolution of the information paradox must address both these issues. The firewall argument focuses only on the first and this leads to order one deviations from the Unruh vacuum for maximally entangled black holes. The nature of the argument does not extend to black holes in pure states. It was shown by Avery, Puhm and the author that requiring the initial state to final state map to be invertible mandates structure at the horizon even for pure states. The proof works if black holes can be formed in generic states and in this paper we show that this is indeed the case. We also demonstrate how models proposed by Susskind, Papadodimas et al. and Maldacena et al. end up making the initial to final state map non-invertible and thus make the horizon "cool" at the cost of unitarity.

  15. The Deepwater Horizon Disaster: What Happened and Why

    SciTech Connect (OSTI)

    Horne, Roland N. (Stanford University) [Stanford University

    2011-01-05T23:59:59.000Z

    The Deepwater Horizon disaster was the largest oil spill in US history, and the second largest spill in the world. 11 men lost their lives in the explosion and fire. Although the impacts of the spill were evident to large numbers of people, its causes were harder to see. This lecture will focus on the technical aspects of the events that led to the spill itself: what happened on the rig before, during and after the event, up to the time the rig sank. As with many engineering disasters, the accident was due to a sequence of failures, including both technical systems and procedural issues. Although the causes were complex and interacting, the lecture will focus on four main problems: (1) the failure of the cement and casing seal, (2) the failure to recognize and respond to hydrocarbon flow into the riser, (3) the ignition of hydrocarbons on the rig, and (4) the failure of the blow-out preventer (BOP) to seal the well. The lecture will conclude with some suggestions as to how events such as the Deepwater Horizon disaster can be avoided in the future. (Roland N. Horne is the Thomas Davies Barrow Professor of Earth Sciences at Stanford University, and was the Chairman of Petroleum Engineering from 1995 to 2006. He holds BE, PhD and DSc degrees from the University of Auckland, New Zealand, all in Engineering Science. Horne is a member of the U.S. National Academy of Engineering and is also an Honorary Member of the Society of Petroleum Engineers.)

  16. Controller Synthesis for Constrained Flight Systems via Receding Horizon Optimization

    E-Print Network [OSTI]

    Murray, Richard M.

    Controller Synthesis for Constrained Flight Systems via Receding Horizon Optimization Richard M stabilize flight systems us- ing receding horizon, optimal control.1,8 This pa- per advocates the use functions at the inner and outer loop levels and significantly enhances the ability of the control system

  17. Organic Aerosol Formation Downwind from the Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    Toohey, Darin W.

    Organic Aerosol Formation Downwind from the Deepwater Horizon Oil Spill Nicole ONeill - ATOC 3500 and aerosol composition of air over the Deepwater Horizon oil spill in the Gulf of Mexico. · The lightest chemicals in the oil evaporated within hours, as scientists expected them to do. What they didn't expect

  18. Finite-Horizon Optimal Transmission Policies for Energy Harvesting Sensors

    E-Print Network [OSTI]

    Jagannathan, Krishna

    Finite-Horizon Optimal Transmission Policies for Energy Harvesting Sensors Rahul Vaze School: krishnaj@ee.iitm.ac.in Abstract--In this paper, we derive optimal transmission poli- cies for energy harvesting sensors to maximize the utility obtained over a finite horizon. First, we consider a single energy

  19. Airships: A New Horizon for Science

    E-Print Network [OSTI]

    Miller, Sarah H; Hillenbrand, Lynne; Rhodes, Jason; Baird, Gil; Blake, Geoffrey; Booth, Jeff; Carlile, David E; Duren, Riley; Edworthy, Frederick G; Freeze, Brent; Friedl, Randall R; Goldsmith, Paul F; Hall, Jeffery L; Hoffman, Scott E; Hovarter, Scott E; Jensen-Clem, Rebecca M; Jones, Ross M; Kauffmann, Jens; Kiessling, Alina; King, Oliver G; Konidaris, Nick; Lachenmeier, Timothy L; Lord, Steven D; Neu, Jessica; Quetin, Gregory R; Ram, Alan; Sander, Stanley; Simard, Marc; Smith, Mike; Smith, Steve; Smoot, Sara; Susca, Sara; Swann, Abigail; Young, Eliot F; Zambrano, Thomas

    2014-01-01T23:59:59.000Z

    The "Airships: A New Horizon for Science" study at the Keck Institute for Space Studies investigated the potential of a variety of airships currently operable or under development to serve as observatories and science instrumentation platforms for a range of space, atmospheric, and Earth science. The participants represent a diverse cross-section of the aerospace sector, NASA, and academia. Over the last two decades, there has been wide interest in developing a high altitude, stratospheric lighter-than-air (LTA) airship that could maneuver and remain in a desired geographic position (i.e., "station-keeping") for weeks, months or even years. Our study found considerable scientific value in both low altitude ( 60 kft) airships across a wide spectrum of space, atmospheric, and Earth science programs. Over the course of the study period, we identified stratospheric tethered aerostats as a viable alternative to airships where station-keeping was valued over maneuverability. By opening up the sky and Earth's strato...

  20. Reporting Incidents Of Security Concern

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

    2001-04-03T23:59:59.000Z

    To enhance the Department of Energy (DOE) Incidents of Security Concern Reporting Program through more consistent reporting, better information tracking, and interactive coordination. DOE N 251.54, dated 07/08/03, extends this directive until 07/08/04. Cancels Deputy Secretary Glauthier memorandum, subject: Reporting Security Incidents, dated 9-7-99.

  1. Horizon news function and quasi-local energy-momentum flux near black hole

    E-Print Network [OSTI]

    Yu-Huei Wu

    2007-03-27T23:59:59.000Z

    From the 'quasi-local' definition of horizons, e.g. isolated horizon and dynamical horizon, the consequence quasi-local energy-momentum near horizons can be observed by using the idea of frame alignment. In particular, we find the horizon news function from the asymptotic expansion near horizons and use this to describe the gravitational flux and change of mass of a black hole.

  2. SunLine Expands Horizons with Fuel Cell Bus Demo. Hydrogen, Fuel...

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

    Expands Horizons with Fuel Cell Bus Demo. Hydrogen, Fuel Cells & Infrastructure Technologies Program, Fuel Cell Bus Demonstration Projects (Fact Sheet). SunLine Expands Horizons...

  3. Perturbative String Thermodynamics near Black Hole Horizons

    E-Print Network [OSTI]

    Thomas G. Mertens; Henri Verschelde; Valentin I. Zakharov

    2014-10-29T23:59:59.000Z

    We provide further computations and ideas to the problem of near-Hagedorn string thermodynamics near (uncharged) black hole horizons, building upon our earlier work JHEP 1403 (2014) 086. The relevance of long strings to one-loop black hole thermodynamics is emphasized. We then provide an argument in favor of the absence of $\\alpha'$-corrections for the (quadratic) heterotic thermal scalar action in Rindler space. We also compute the large $k$ limit of the cigar orbifold partition functions (for both bosonic and type II superstrings) which allows a better comparison between the flat cones and the cigar cones. A discussion is made on the general McClain-Roth-O'Brien-Tan theorem and on the fact that different torus embeddings lead to different aspects of string thermodynamics. The black hole/string correspondence principle for the 2d black hole is discussed in terms of the thermal scalar. Finally, we present an argument to deal with arbitrary higher genus partition functions, suggesting the breakdown of string perturbation theory (in $g_s$) to compute thermodynamical quantities in black hole spacetimes.

  4. Recommendations to Address Power Reliability Concerns Raised...

    Energy Savers [EERE]

    Reliability Concerns Raised as a Result of Pending Environmental Regulations for Electric Generation Stations Recommendations to Address Power Reliability Concerns Raised as a...

  5. Addendum to Environmental Review Documents Concerning Exports...

    Energy Savers [EERE]

    Addendum to Environmental Review Documents Concerning Exports of Natural Gas From the US Addendum to Environmental Review Documents Concerning Exports of Natural Gas From the US...

  6. A note on electrical and thermodynamic properties of Isolated Horizon

    E-Print Network [OSTI]

    Gerui Chen; Xiaoning Wu; Sijie Gao

    2014-10-29T23:59:59.000Z

    The electrical laws and Carnot cycle of Isolated Horizon (IH) are investigated in this paper. We establish the Ohm's law and Joule's law of an Isolated Horizon, and find that the conceptual picture of black holes (Membrane Paradigm) can also apply to this kind of quasi-local black holes. We also investigate the geometrical properties near a non-rotating IH, and find that under the first-order approximation of r, there exist a Killing vector and a Hamiltonian conjugate to it, so this vector is a physical observer. We calculate the energy as measured at infinity of a particle at rest outside a non-rotating IH, and use this result to construct a reversible Carnot cycle with the Isolated Horizon as a cold reservoir, which confirms the thermodynamic nature of Isolated Horizon.

  7. A note on electrical and thermodynamic properties of Isolated Horizon

    E-Print Network [OSTI]

    Chen, Gerui; Gao, Sijie

    2014-01-01T23:59:59.000Z

    The electrical laws and Carnot cycle of Isolated Horizon (IH) are investigated in this paper. We establish the Ohm's law and Joule's law of an Isolated Horizon, and find that the conceptual picture of black holes (Membrane Paradigm) can also apply to this kind of quasi-local black holes. We also investigate the geometrical properties near a non-rotating IH, and find that under the first-order approximation of r, there exist a Killing vector and a Hamiltonian conjugate to it, so this vector is a physical observer. We calculate the energy as measured at infinity of a particle at rest outside a non-rotating IH, and use this result to construct a reversible Carnot cycle with the Isolated Horizon as a cold reservoir, which confirms the thermodynamic nature of Isolated Horizon.

  8. Green functions and Euclidean fields near the bifurcate Killing horizon

    E-Print Network [OSTI]

    Z. Haba

    2007-08-13T23:59:59.000Z

    We approximate a Euclidean version of a D+1 dimensional manifold with a bifurcate Killing horizon by a product of a two-dimensional Rindler space and a D-1 dimensional manifold M. We obtain approximate formulas for the Green functions. We study the behaviour of Green functions near the horizon and their dimensional reduction. We show that if M is compact then the massless minimally coupled quantum field contains a zero mode which is a conformal invariant free field on R^2. Then, the Green function near the horizon can be approximated by the Green function of the two-dimensional quantum field theory. The correction term is exponentially small away from the horizon. If the volume of a geodesic ball is growing to infinity with its radius then the Green function cannot be approximated by a two-dimensional one.

  9. Acoustic measurement of the Deepwater Horizon Macondo well flow rate

    E-Print Network [OSTI]

    Camilli, Richard

    On May 31, 2010, a direct acoustic measurement method was used to quantify fluid leakage rate from the Deepwater Horizon Macondo well prior to removal of its broken riser. This method utilized an acoustic imaging sonar and ...

  10. Predictive energy management for hybrid electric vehicles -Prediction horizon and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Predictive energy management for hybrid electric vehicles - Prediction horizon and battery capacity of a combined hybrid electric vehicle. Keywords: Hybrid vehicles, Energy Management, Predictive control, Optimal predictive energy management realistic. This energy management strategy uses a dynamic programming algorithm

  11. Approximate Dynamic Programming for a Class of Long-Horizon ...

    E-Print Network [OSTI]

    2014-04-06T23:59:59.000Z

    require hours to produce good solutions even when the planning horizon is 90 ... Surveys of general IRPs for all modes of transportation are given in [1] and [9]. .... Dynamic fleet management problems are a special case in this problem class.

  12. String-theoretic breakdown of effective field theory near black hole horizons

    E-Print Network [OSTI]

    Dodelson, Matthew

    2015-01-01T23:59:59.000Z

    We investigate the validity of the equivalence principle near horizons in string theory, analyzing the breakdown of effective field theory caused by longitudinal string spreading effects. An experiment is set up where a detector is thrown into a black hole a long time after an early infalling string. Light cone gauge calculations, taken at face value, indicate a detectable level of root-mean-square longitudinal spreading of the initial string as measured by the late infaller. This results from the large relative boost between the string and detector in the near horizon region, which develops automatically despite their modest initial energies outside the black hole and the weak curvature in the geometry. We subject this scenario to basic consistency checks, using these to obtain a relatively conservative criterion for its detectability. In a companion paper, we exhibit longitudinal nonlocality in well-defined gauge-invariant S-matrix calculations, obtaining results consistent with the predicted spreading albe...

  13. String-theoretic breakdown of effective field theory near black hole horizons

    E-Print Network [OSTI]

    Matthew Dodelson; Eva Silverstein

    2015-04-21T23:59:59.000Z

    We investigate the validity of the equivalence principle near horizons in string theory, analyzing the breakdown of effective field theory caused by longitudinal string spreading effects. An experiment is set up where a detector is thrown into a black hole a long time after an early infalling string. Light cone gauge calculations, taken at face value, indicate a detectable level of root-mean-square longitudinal spreading of the initial string as measured by the late infaller. This results from the large relative boost between the string and detector in the near horizon region, which develops automatically despite their modest initial energies outside the black hole and the weak curvature in the geometry. We subject this scenario to basic consistency checks, using these to obtain a relatively conservative criterion for its detectability. In a companion paper, we exhibit longitudinal nonlocality in well-defined gauge-invariant S-matrix calculations, obtaining results consistent with the predicted spreading albeit not in a direct analogue of the black hole process. We discuss applications of this effect to the firewall paradox, and estimate the time and distance scales it predicts for new physics near black hole and cosmological horizons.

  14. Universal thermodynamics in different gravity theories: Modified entropy on the horizons

    E-Print Network [OSTI]

    Saugata Mitra; Subhajit Saha; Subenoy Chakraborty

    2015-03-10T23:59:59.000Z

    The paper deals with universal thermodynamics for FRW model of the universe bounded by apparent (or event) horizon. Assuming Hawking temperature on the horizon, the unified first law is examined on the horizon for different gravity theories. The results show that equilibrium configuration is preserved with a modification to Bekenstein entropy on the horizon.

  15. Hagedorn String Thermodynamics in Curved Spacetimes and near Black Hole Horizons

    E-Print Network [OSTI]

    Thomas G. Mertens

    2015-06-25T23:59:59.000Z

    This thesis concerns the study of high-temperature string theory on curved backgrounds, generalizing the notions of Hagedorn temperature and thermal scalar to general backgrounds. Chapter 2 contains a review on string thermodynamics in flat space, setting the stage. Chapters 3 and 4 contain the detailed study of the random walk picture in a general curved background. Chapters 5 and 6 then apply this to Rindler space, the near-horizon approximation of a generic (uncharged) black hole. Chapters 7 and 8 contain a study of the AdS3 and BTZ WZW models where we study the thermal spectrum and the resulting random walk picture that emerges. Chapters 9 and 10 attempt to draw general conclusions from the study of the two specific examples earlier: we draw lessons on string thermodynamics in general and on (perturbative) string thermodynamics around black hole horizons. For the latter, we point out a possible link to the firewall paradox. Finally, chapter 11 contains a detailed discussion on the near-Hagedorn (and high-energy) stress tensor in a generic spacetime, the results of which are applied to provide a description of the Bekenstein-Hawking entropy in terms of long string equilibration.

  16. Acceleration of particles near the inner black hole horizon

    E-Print Network [OSTI]

    O. B. Zaslavskii

    2011-12-16T23:59:59.000Z

    We study the possibility of obtaining unbound energy E_{c.m.} in the centre of mass frame when two particles collide near the inner black hole horizon. We consider two different cases - when both particles move (i) in the same direction or (ii) in the opposite ones. We also discuss two different versions of the effect - whether an infinite energy can be released in the collision (strong version) or the energy E_{c.m.} is finite but can be made as large as one likes (weak version). We demonstrate that the strong version of the effect is impossible in both cases (i) and (ii). In case (i) this is due to the fact that in the situation when E_{c.m.} formally diverges on the horizon, one of particles passes through the bifurcation point where two horizons meet while the second particle does not, so collision does not occur. In case (ii), both particles hit different branches of the horizon. The weak version is possible in both cases, provided at least one of particles starts its motion inside the horizon along the direction of spatial symmetry from infinity.

  17. Nearly extremal apparent horizons in simulations of merging black holes

    E-Print Network [OSTI]

    Geoffrey Lovelace; Mark A. Scheel; Robert Owen; Matthew Giesler; Reza Katebi; Bela Szilagyi; Tony Chu; Nicholas Demos; Daniel A. Hemberger; Lawrence E. Kidder; Harald P. Pfeiffer; Nousha Afshari

    2015-02-27T23:59:59.000Z

    The spin angular momentum $S$ of an isolated Kerr black hole is bounded by the surface area $A$ of its apparent horizon: $8\\pi S \\le A$, with equality for extremal black holes. In this paper, we explore the extremality of individual and common apparent horizons for merging, rapidly spinning binary black holes. We consider simulations of merging black holes with equal masses $M$ and initial spin angular momenta aligned with the orbital angular momentum, including new simulations with spin magnitudes up to $S/M^2 = 0.994$. We measure the area and (using approximate Killing vectors) the spin on the individual and common apparent horizons, finding that the inequality $8\\pi S A$ and for which our lower bound on their Booth-Fairhurst extremality exceeds unity. These superextremal surfaces are always surrounded by marginally outer trapped surfaces (i.e., by apparent horizons) with $8\\pi Shorizon is always less than unity but can exceed the value for an extremal Kerr black hole. (Abstract abbreviated.)

  18. Thermodynamics of Black Hole Horizons and Kerr/CFT Correspondence

    E-Print Network [OSTI]

    Bin Chen; Shen-xiu Liu; Jia-ju Zhang

    2012-11-02T23:59:59.000Z

    In this paper we investigate the thermodynamics of the inner horizon and its implication on the holographic description of the black hole. We focus on the black holes with two physical horizons. Under reasonable assumption, we prove that the first law of thermodynamics of the outer horizon always indicates that of the inner horizon. As a result, the fact that the area product being mass-independent is equivalent to the relation $T_+S_+=T_-S_-$, with $T_\\pm$ and $S_\\pm$ being the Hawking temperatures and the entropies of the outer and inner horizon respectively. We find that the mass-independence of area product breaks down in general Myers-Perry black holes with spacetime dimension $d\\geq6$ and Kerr-AdS black holes with $d\\geq4$. Moreover we discuss the implication of the first laws of the outer and inner horizons on the thermodynamics of the right- and left-moving sectors of dual CFT in Kerr/CFT correspondence. We show that once the relation $T_+S_+=T_-S_-$ is satisfied, the central charges of two sectors must be same. Furthermore from the thermodynamics relations, we read the dimensionless temperatures of microscopic CFT, which are in exact agreement with the ones obtained from hidden conformal symmetry in the low frequency scattering off the black holes, and then determine the central charges. This method works well in well-known cases in Kerr/CFT correspondence, and reproduce successfully the holographic pictures for 4D Kerr-Newman and 5D Kerr black holes. We go on to predict the central charges and temperatures of a possible holographic CFT description dual to 5D doubly rotating black ring.

  19. Department of Energy Employee Concerns Program

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

    2014-12-02T23:59:59.000Z

    The purpose of this Order is to maintain an Employee Concerns Program at DOE, including NNSA, that encourages the free and open expression of employee concerns and provides DOE federal, contractor, and subcontractor employees with an independent avenue to raise any concern related, but not limited, to the environment, safety, health, security, quality, and management, as well as harassment, intimidation, retaliation, and discrimination.

  20. Department of Energy Employee Concerns Program

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

    1999-02-01T23:59:59.000Z

    Establishes a Department of Energy Employee Concerns Program (ECP) that ensures employee concerns related to such issues such as the environment, safety, health, and management of DOE programs and facilities are properly addressed. Cancels DOE O 5480.29, Employee Concerns Management System, dated 1/15/93.

  1. Spectral properties of acoustic black hole radiation: Broadening the horizon

    SciTech Connect (OSTI)

    Finazzi, Stefano; Parentani, Renaud [SISSA, via Bonomea 265, Trieste 34151 (Italy) and INFN sezione di Trieste, Via Valerio 2, Trieste 34127 (Italy); Laboratoire de Physique Theorique, CNRS UMR 8627, Batiment 210, Universite Paris-Sud 11, 91405 Orsay Cedex (France)

    2011-04-15T23:59:59.000Z

    The sensitivity of the black hole spectrum when introducing short distance dispersion is studied in the context of atomic Bose condensates. By considering flows characterized by several length scales, we show that, while the spectrum remains remarkably Planckian, the temperature is no longer fixed by the surface gravity. Rather it is determined by the average of the flow gradient across the horizon over an interval fixed by the healing length and the surface gravity, as if the horizon were broadened. This remains valid as long as the flow does not induce nonadiabatic effects that produce oscillations or some parametric amplification of the flux.

  2. Thermodynamics on the apparent horizon in generalized gravity theories

    E-Print Network [OSTI]

    Shao-Feng Wu; Bin Wang; Guo-Hong Yang

    2008-01-17T23:59:59.000Z

    We present a general procedure to construct the first law of thermodynamics on the apparent horizon and illustrate its validity by examining it in some extended gravity theories. Applying this procedure, we can describe the thermodynamics on the apparent horizon in Randall-Sundrum braneworld imbedded in a nontrivial bulk. We discuss the mass-like function which was used to link Friedmann equation to the first law of thermodynamics and obtain its special case which gives the generalized Misner-Sharp mass in Lovelock gravity.

  3. Horizons and Tunneling in the Euclidean False Vacuum

    E-Print Network [OSTI]

    Kate Marvel; Neil Turok

    2007-12-17T23:59:59.000Z

    In the thin-wall approximation, the decay of a gravitating false vacuum to a lower-energy state is affected by the cosmological horizon structure in both spaces. The nucleation radius of a bubble of true vacuum depends on the surface tension of its boundary and equals the false vacuum cosmological horizon at a critical tension. We argue that there is no tunneling instanton solution beyond the critical tension and argue that there is therefore a bound on allowed membrane tension in theories which rely on semiclassical tunneling to relax the cosmological constant.

  4. Dynamics of the Cosmological Apparent Horizon: Surface Gravity & Temperature

    E-Print Network [OSTI]

    Alexis Helou

    2015-02-14T23:59:59.000Z

    In the context of thermodynamics applied to our cosmological apparent horizon, we explicit in greater details our previous work which established the Friedmann Equations from projection of Hayward's Unified First Law. In particular, we show that the dynamical Hayward-Kodama surface gravity is perfectly well-defined and is suitable for this derivation. We then relate this surface gravity to a physical notion of temperature, and show this has constant, positive sign for any kind of past-inner trapping horizons. Hopefully this will clarify the choice of temperature in a dynamical Friedmann-Lema\\^itre-Roberston-Walker spacetime.

  5. On the construction of Hartle-Hawking-Israel states across a static bifurcate Killing horizon

    E-Print Network [OSTI]

    Ko Sanders

    2015-01-29T23:59:59.000Z

    We consider a linear scalar quantum field propagating in a space-time with a static bifurcate Killing horizon and a wedge reflection. We prove the existence of a Hadamard state which is pure, quasi-free, invariant under the Killing flow and which restricts to a double KMS state at the inverse Hawking temperature on the union of the exterior wedge regions. The existence of such a state was first conjectured by Hartle and Hawking (1976) and Israel (1976) for stationary black hole space times. Our result complements a uniqueness result of Kay and Wald (1991), who considered a general bifurcate Killing horizon and proved that a certain (large) subalgebra of the free field algebra admits at most one Hadamard state which is invariant under the Killing flow. In the presence of a wedge reflection this state reduces to a pure, quasi-free KMS state on the smaller subalgebra associated to one of the exterior wedge regions. Our result establishes the existence of such a state on the full algebra in the static case. Our proof follows the arguments of Sewell (1982) and Jacobson (1994), exploiting a Wick rotation in the Killing time coordinate to construct a corresponding Euclidean theory. Because the Killing time coordinate is ill-defined on the bifurcation surface we systematically replace it by a Gaussian normal coordinate. A crucial part of our proof is to establish that the Euclidean ground state satisfies the necessary analogs of analyticity and reflection positivity with respect to this coordinate.

  6. Mateas, M. 2005. Procedural Literacy: Educating the New Media Practitioner. On The Horizon. Special Issue. Future of Games, Simulations and Interactive Media in Learning Contexts, v13, n1 2005.

    E-Print Network [OSTI]

    Mateas, Michael

    Mateas, M. 2005. Procedural Literacy: Educating the New Media Practitioner. On The Horizon. Special Literacy: Educating the New Media Practitioner Michael Mateas Abstract For humanities scholars, artists on the theoretical and aesthetic concerns of new media. New media scholars and practitioners, including game

  7. Pedagogical notes on black holes, de Sitter space, and bifurcated horizons

    E-Print Network [OSTI]

    Tom Banks

    2010-07-22T23:59:59.000Z

    I discuss black hole evaporation in two different coordinate systems and argue that the results of the two are compatible once one takes the holographic principle into account. de Sitter space is then discussed along similar lines. Finally I make some remarks about smooth initial conditions in GR, which evolve to space-times with bifurcate horizons, and emphasize the care one must take in identifying spaces of solutions of General Relativity which belong to the same quantum theory of gravity. No really new material is presented, but the point of view I take on all 3 subjects is not widely appreciated.

  8. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    Resource Damage Assessment: Description and Results for Marine Sediment QA10SED01 Michele M. Schantz resource damage assessment (NRDA) in response to the Deepwater Horizon (DWH) oil spill in the Gulf are conducting a natural resource damage assessment (NRDA) to determine what resources have been injured and what

  9. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    Resource Damage Assessment: Description and Results for Mussel Tissue QA10TIS01 Michele M. Schantz and John resource damage assessment (NRDA) in response to the Deepwater Horizon (DWH) oil spill in the Gulf and state agencies are conducting a natural resource damage assessment (NRDA) to determine what resources

  10. Shear Waves, Sound Waves On A Shimmering Horizon

    E-Print Network [OSTI]

    Omid Saremi

    2007-03-19T23:59:59.000Z

    In the context of the so called ``membrane paradigm'' of black holes/branes, it has been known for sometime that the dynamics of small fluctuations on the stretched horizon can be viewed as corresponding to diffusion of a conserved charge in simple fluids. To study shear waves in this context properly, one must define a conserved stress tensor living on the stretched horizon. Then one is required to show that such a stress tensor satisfies the corresponding constitutive relations. These steps are missing in a previous treatment of the shear perturbations by Kovtun, Starinets and Son. In this note, we fill the gap by prescribing the stress tensor on the stretched horizon to be the Brown and York (or Balasubramanian-Kraus (BK) in the AdS/CFT context) holographic stress tensor. We are then able to show that such a conserved stress tensor satisfies the required constitutive relation on the stretched horizon using Einstein equations. We read off the shear viscosity from the constitutive relations in two different channels, shear and sound. We find an expression for the shear viscosity in both channels which are equal, as expected. Our expression is in agreement with a previous membrane paradigm formula reported by Kovtun, Starinets and Son.

  11. Adaptive Receding Horizon Control of a Distributed Collector Solar Field

    E-Print Network [OSTI]

    Sontag, Eduardo

    for a distributed collector solar field which ex- plicitly explores its distributed parameter character. The plant, distributed collector solar fields are repre- sentative of an important class of distributed parameter plantsAdaptive Receding Horizon Control of a Distributed Collector Solar Field J.M. Igreja, J. M. Lemos

  12. SC-RISE LECTURE SERIES BRIGHT HORIZONS IN SOLAR ENERGY

    E-Print Network [OSTI]

    SC-RISE LECTURE SERIES BRIGHT HORIZONS IN SOLAR ENERGY Sustainable Energy Opportunities, Options are being developed including biomass, geothermal, hydropower, ocean thermal energy conversion, solar electric, solar thermal, and wind. However, such aspects as low energy density, siting, and temporal

  13. Soil Horizons Some Noteworthy Soil Science in Wisconsin

    E-Print Network [OSTI]

    Mladenoff, David

    Soil Horizons Some Noteworthy Soil Science in Wisconsin Alfred E. Hartemink The impact and benefits of soil science have only partly been documented. Here I highlight four noteworthy soil science achievements from the state of Wisconsin that took place between 1870 and the early 1980s: (i) the first soil

  14. Deepwater Horizon Study Group 3 Environmental Report January 2011

    E-Print Network [OSTI]

    Silver, Whendee

    to 53,000 barrels a day as the reservoir gradually depleted itself. 4.9 million barrels (205.8 million The Deepwater Horizon oil rig exploded 5,000 feet below the surface of the Gulf of Mexico on April 20, 2010. The Flow Rate Technical Group estimates the leak initially produced 62,000 barrels of oil a day and eased

  15. Seismic Volume Visualization for Horizon Extraction Daniel Patel

    E-Print Network [OSTI]

    present a novel system for rapidly interpret- ing and visualizing seismic volumetric data. First we to seismic data interpretation. Keywords: Seismic interpretation, Seismic horizons, Volume ren- dering hydrocarbons are trapped. In this paper we present a system for rapid interpretation of seismic reflection

  16. Spherical collapse with heat flow and without horizon

    E-Print Network [OSTI]

    A. Banerjee; S. Chatterjee; N. Dadhich

    2002-09-10T23:59:59.000Z

    We present a class of solutions for a heat conducting fluid sphere, which radiates energy during collapse without the appearance of horizon at the boundary at any stage of the collapse. A simple model shows that there is no accumulation of energy due to collapse since it radiates out at the same rate as it is being generated.

  17. Evolution of the horizons for dark energy universe

    E-Print Network [OSTI]

    Ritabrata Biswas; Nairwita Mazumder; Subenoy Chakraborty

    2011-06-12T23:59:59.000Z

    Recent observational evidences of accelerating phase of the universe strongly demand that the dominating matter in the universe is in the form of dark energy. In this work, we study the evolution of the apparent and event horizons for various dark energy models and examine their behavior across phantom barrier line.

  18. Causal temperature profiles in horizon-free collapse

    E-Print Network [OSTI]

    N F Naidu; M Govender

    2005-10-04T23:59:59.000Z

    We investigate the causal temperature profiles in a recent model of a radiating star undergoing dissipative gravitational collapse without the formation of an horizon. It is shown that this simple exact model provides a physically reasonable behaviour for the temperature profile within the framework of extended irreversible thermodynamics.

  19. Horizon Dynamics of Evaporating Black Holes in a Higher Dimensional Inflationary Universe

    E-Print Network [OSTI]

    Manasse Mbonye

    1999-08-19T23:59:59.000Z

    Spherically symmetric Black Holes of the Vaidya type are examined in an asymptotically de Sitter, higher dimensional spacetime. The various horizons are located. The structure and dynamics of such horizons are studied.

  20. Microbial gene functions enriched in the Deepwater Horizon deep-sea oil plume

    E-Print Network [OSTI]

    Lu, Z.

    2012-01-01T23:59:59.000Z

    Horizon oil spill in the Gulf of Mexico is the deepest andof Gulf of Mexico from other historic offshore oil spillsDeepwater Horizon oil spill in the Gulf of Mexico was one of

  1. Liouville theory beyond the cosmological horizon

    E-Print Network [OSTI]

    Geoffrey Compère; Laura Donnay; Pierre-Henry Lambert; Waldemar Schulgin

    2015-04-29T23:59:59.000Z

    The dS/CFT correspondence postulates the existence of a Euclidean CFT dual to a suitable gravity theory with Dirichlet boundary conditions asymptotic to de Sitter spacetime. A semi-classical model of such a correspondence consists of Einstein gravity with positive cosmological constant and without matter which is dual to Euclidean Liouville theory defined at the future conformal boundary. Here we show that Euclidean Liouville theory is also dual to Einstein gravity with Dirichlet boundary conditions on a fixed timelike slice in the static patch. Intriguingly, the spacetime interpretation of Euclidean Liouville time is the physical time of the static observer. As a prerequisite of this correspondence, we show that the asymptotic symmetry algebra which consists of two copies of the Virasoro algebra extends everywhere into the bulk.

  2. Is thermodynamics of the universe bounded by the event horizon a Bekenstein system?

    E-Print Network [OSTI]

    Subenoy Chakraborty

    2012-11-12T23:59:59.000Z

    In this brief communication, we have studied the validity of the first law of thermodynamics for the universe bounded by event horizon with two examples. The key point is the appropriate choice of the temperature on the event horizon. Finally, we have concluded that universe bounded by the event horizon may be a Bekenstein system and the Einstein's equations and the first law of thermodynamics on the event horizons are equivalent.

  3. Social Networks and Online Privacy Concerns Survey The Social Networks and Online Privacy Concerns Survey

    E-Print Network [OSTI]

    Kaiser, Gail E.

    Social Networks and Online Privacy Concerns Survey The Social Networks and Online Privacy Concerns Survey The Social Networks and Online Privacy Concerns Survey is part of a research project survey #12;0% 100% Yes Unsure No Yes Unsure No Social Networks and Online Privacy Concerns Survey

  4. LE BULLETIN DE L'EPI N 43 LOGICIELS DIDACT, HORIZON, ROSEAU PROPOS DES LOGICIELS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    141 LE BULLETIN DE L'EPI N° 43 LOGICIELS DIDACT, HORIZON, ROSEAU � PROPOS DES LOGICIELS DIDACT supprimer sur une disquette en unité FL0 les fichiers utilisateurs créés par Didact, Horizon ou Roseau CP BULLETIN DE L'EPI LOGICIELS DIDACT, HORIZON, ROSEAU d) le travail se fait. Noter que pour une deuxième

  5. Deepwater Horizon Study Finds Crude Oil Harmful to Bluefin, Yellowfin Tuna

    E-Print Network [OSTI]

    Grosell, Martin

    , as a large plume of smoke rises from fires on BP's Deepwater Horizon offshore oil rig. Image: Gerald Herbert Deepwater Horizon oil spill caused malformations in developing hearts of yellowfin and bluefin tuna the Deepwater Horizon spill. An Atlantic bluefin tuna. Image: Wikimedia Commons #12;They found a variety

  6. Atmospheric emissions from the Deepwater Horizon spill constrain airwater partitioning, hydrocarbon fate, and leak rate

    E-Print Network [OSTI]

    Toohey, Darin W.

    Atmospheric emissions from the Deepwater Horizon spill constrain airwater partitioning, hydrocarbon amounts (258,000 kg/day) of hydrocarbons evaporating promptly from the Deepwater Horizon spill; these data. Citation: Ryerson, T. B., et al. (2011), Atmo- spheric emissions from the Deepwater Horizon spill constrain

  7. EPA - Guidance for Incorporating Environmental Justice Concerns...

    Open Energy Info (EERE)

    Environmental Justice Concerns in EPA's NEPA Compliance Analyses Jump to: navigation, search OpenEI Reference LibraryAdd to library PermittingRegulatory Guidance - GuideHandbook:...

  8. Disclosure of Permitted Communication Concerning Fossil Fuel...

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

    DOE 433 ex parte memo.pdf More Documents & Publications Disclosure of Permitted Communication Concerning Regional Standards Enforcement Framework Document -- Docket No....

  9. Disclosure of Permitted Communication Concerning Regional Standards...

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

    furnacestdwaiverpolicy.pdf More Documents & Publications Disclosure of Permitted Communication Concerning Fossil Fuel Energy Consumption Reduction for New Construction and Major...

  10. Violation of Laws, Losses, and Incidents of Security Concerns

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

    1992-09-15T23:59:59.000Z

    To set forth Department of Energy (DOE) procedures to assure timely and effective action relating to violations of criminal, laws, loses, and incidents of security concern to DOE. Cancels DOE O 5631.5. Canceled by DOE O 470.1 of 9-28-1995.

  11. WAVELET TRANSFORMS FOR SYSTEM IDENTIFICATION AND ASSOCIATED PROCESSING CONCERNS

    E-Print Network [OSTI]

    Kareem, Ahsan

    WAVELET TRANSFORMS FOR SYSTEM IDENTIFICATION AND ASSOCIATED PROCESSING CONCERNS Tracy L. Kijewski1 , Student Member ASCE and Ahsan Kareem2 , Member ASCE ABSTRACT The time-frequency character of wavelet-domain transform, particularly for the popular Morlet wavelet. Unfortunately, in prior applications of wavelet

  12. British Petroleum's Deepwater Horizon Accident and the Thinking, Engaged Workforce - 13265

    SciTech Connect (OSTI)

    Rigot, William L. [Fluor Corporation, Technical Support Services (United States)] [Fluor Corporation, Technical Support Services (United States)

    2013-07-01T23:59:59.000Z

    On April 20, 2010, hydrocarbons escaped from the Macondo well into Transocean's Deepwater Horizon, resulting in fire and multiple explosions. 11 people on the rig died. The billion dollar Deepwater Horizon sank. 4.9 M gallons of product flowed from the well for 87 days creating an environmental nightmare for communities bordering on the Gulf of Mexico. BP established a $20 B reserve to pay for damages. Investigations and legal culpability continue to this day. In September 2010, the Institute for Nuclear Power Operators (INPO) issued Significant Operating Experience Report (SOER) 10-2, Engaged, Thinking Organizations. The industry had experienced 11 events, 9 in US commercial nuclear utilities, and 2 international, that had disturbing trends. The underlying causes highlighted by INPO were inadequate recognition of risk, weaknesses in application of significant operating experience, tolerance of equipment and personnel problems, and a significant drift in standards. While the noted INPO problems and the Deepwater Horizon event appear to have nothing in common, they do exhibit similarities in a drift away from expected behavior on the part of front line workers and their supervisors. At the same time, hidden hazards are accumulating in the environment leading to error intolerant conditions. Without a good understanding of this concept, many organizations tend to focus on the person who 'touched it last', while missing the deeper organizational factors that led that individual to think that what they were doing was correct. An understanding of this failure model is important in reconstruction of events and crafting effective corrective actions. It is much more important, however, for leaders in high hazard industries to recognize when they are approaching error intolerant conditions and take steps immediately to add safety margin. (authors)

  13. Day of Concern Collection / Ture Erickson (collector)

    E-Print Network [OSTI]

    Handy, Todd C.

    Day of Concern Collection / Ture Erickson (collector) Last revised October 2011 University;Collection Description Day of Concern collection / Ture Erickson (collector). ­ 1984. 6.5 cm of textual records. Collector's Biographical Sketch Born in New Westminster, Ture Erickson became Head of Sedgewick

  14. Department of Energy Employee Concerns Program

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

    2001-06-06T23:59:59.000Z

    The order establishes a DOE Employee Concerns Program (ECP) to ensure that employee concerns related the environment, safety, health, and management of DOE and NNSA programs and facilities are addressed. Cancels DOE O 442.1 and DOE 5480.29

  15. Connecting horizon pixels and interior voxels of a black hole

    E-Print Network [OSTI]

    Piero Nicolini; Douglas Singleton

    2014-10-03T23:59:59.000Z

    In this paper we discuss to what extent one can infer details of the interior structure of a black hole based on its horizon. Recalling that black hole thermal properties are connected to the non-classical nature of gravity, we circumvent the restrictions of the no hair theorem by postulating that the black hole interior is singularity free due to violations of the usual energy conditions. Further these conditions allow one to establish a one-to-one, holographic projection between Planckian areal "bits" on the horizon and "voxels", representing the gravitational degrees of freedom in the black hole interior. We illustrate the repercussions of this idea by discussing an example of the black hole interior consisting of a de Sitter core postulated to arise from the local graviton quantum vacuum energy. It is shown that the black hole entropy can emerge as the statistical entropy of a gas of voxels.

  16. A time and frequency domain analysis of contrarian trading strategies/

    E-Print Network [OSTI]

    Chaudhuri, Shomesh E

    2014-01-01T23:59:59.000Z

    This thesis applies time and frequency domain analyses to a high-frequency market making strategy to study the profitability of liquidity provision over multiple time horizons from 1964 to 2013. Using daily returns and ...

  17. Optimization of time-based rates in forward energy markets

    E-Print Network [OSTI]

    Wang, J.

    This paper presents a new two-step design approach of Time-Based Rate (TBR) programs for markets with a high penetration of variable energy sources such as wind power. First, an optimal market time horizon must be determined ...

  18. Horizon effects with surface waves on moving water

    E-Print Network [OSTI]

    Germain Rousseaux; Philippe Maissa; Christian Mathis; Pierre Coullet; Thomas G. Philbin; Ulf Leonhardt

    2010-10-01T23:59:59.000Z

    Surface waves on a stationary flow of water are considered, in a linear model that includes the surface tension of the fluid. The resulting gravity-capillary waves experience a rich array of horizon effects when propagating against the flow. In some cases three horizons (points where the group velocity of the wave reverses) exist for waves with a single laboratory frequency. Some of these effects are familiar in fluid mechanics under the name of wave blocking, but other aspects, in particular waves with negative co-moving frequency and the Hawking effect, were overlooked until surface waves were investigated as examples of analogue gravity [Sch\\"utzhold R and Unruh W G 2002 Phys. Rev. D 66 044019]. A comprehensive presentation of the various horizon effects for gravity-capillary waves is given, with emphasis on the deep water/short wavelength case kh>>1 where many analytical results can be derived. A similarity of the state space of the waves to that of a thermodynamic system is pointed out.

  19. Iridium abundance measurements across bio-event horizons in the fossil record

    SciTech Connect (OSTI)

    Orth, C.J.; Attrep, M. Jr.; Quintana, L.R. (Los Alamos National Lab., NM (USA))

    1989-01-01T23:59:59.000Z

    Geochemical measurements have been performed on thousands of rock samples collected across bio-event horizons using Instrumental Neutron Activation Analysis (INAA) for about 40 common and trace elements and radiochemical isolation procedures for Ir. On selected samples, Os, Pt and Au were also radiochemically determined. These studies have encompassed the time interval from the Precambrian-Cambrian transition to the Late Eocene impact (microspherule) horizons. Our early work strengthened the Alvarez impact hypothesis by finding the Ir (PGE) anomaly at the K-T boundary in continental sedimentary sequences. In collaborations with paleontologists, weak to moderately string Ir anomalies have been discovered at the Frasnian-Famennian boundary in Australia, in the Early Mississippian of Oklahoma, at the Mississipian-Pennsylvanian boundary of Oklahoma and Texas, and in the Late Cenomanian throughout the western interior of North America and on the south coast of England to date. We have found no compelling evidence for an impact related cause for these anomalies although PGE impact signatures in the two Late Cenomanian anomalies could be masked by the strong terrestrial mafic to ultramafic overprint. Thus far, our evidence for extinction events older than the terminal Cretaceous does not support recent hypotheses which suggest that impacts from cyclic swarms of comets in the inner Solar system were responsible for the periodic mass extinctions. 50 refs., 7 figs., 3 tabs.

  20. Gödel black hole, closed timelike horizon, and the study of particle emissions

    E-Print Network [OSTI]

    Sourav Bhattacharya; Anirban Saha

    2010-07-22T23:59:59.000Z

    We show that a particle, with positive orbital angular momentum, following an outgoing null/timelike geodesic, shall never reach the closed timelike horizon (CTH) present in the $(4+1)$-dimensional rotating G\\"{o}del black hole space-time. Therefore a large part of this space-time remains inaccessible to a large class of geodesic observers, depending on the conserved quantities associated with them. We discuss how this fact and the existence of the closed timelike curves present in the asymptotic region make the quantum field theoretic study of the Hawking radiation, where the asymptotic observer states are a pre-requisite, unclear. However, the semiclassical approach provides an alternative to verify the Smarr formula derived recently for the rotating G\\"{o}del black hole. We present a systematic analysis of particle emissions, specifically for scalars, charged Dirac spinors and vectors, from this black hole via the semiclassical complex path method.

  1. Message Authentication message authentication is concerned with

    E-Print Network [OSTI]

    Message Authentication · message authentication is concerned with: ­protecting the integrity of a message ­validating identity of originator ­non-repudiation of origin (dispute resolution) · will consider the security requirements · then three alternative functions used: ­message encryption ­message authentication

  2. Employee Concerns Reporting Form | National Nuclear Security...

    National Nuclear Security Administration (NNSA)

    25 26 27 28 29 30 31 Year 2014 2015 2016 *Name or Code Word**: Phone number: Use format xxx-xxx-xxxx *Correspondence Address: Submit Form Your concerns will be sent to the DOE...

  3. DYER ISLAND CONSERVATION TRUST LETTER OF CONCERN

    E-Print Network [OSTI]

    de Villiers, Marienne

    ..........................................................................................................................8 4 GENERAL POTENTIAL IMPACTS OF THE NPS ON THE MARINE ENVIRONMENTDYER ISLAND CONSERVATION TRUST LETTER OF CONCERN ASSOCIATED WITH THE ESTABLISHMENT OF A NUCLEAR....................................................................................................................................6 3 THE MARINE ENVIRONMENT SURROUNDING BANTAMSKLIP

  4. Critical Areas of State Concern (Maryland)

    Broader source: Energy.gov [DOE]

    This legislation designates the Chesapeake Bay, other Atlantic Coastal Bays, and their tributaries and adjacent lands as critical areas of state concern. It is state policy to protect these areas...

  5. DOE Headquarters Contact Information: Employee Concerns Program...

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

    Site Office Employee Concerns Program 900 Commerce Road East New Orleans, LA 70123 UPF Project Management Office Karen Ott 865-574-1626 karen.ott@upo.doe.gov West Valley...

  6. Information Concerning Reliability Impacts under Various System...

    Energy Savers [EERE]

    of the Mirant Potomac River Plant Docket No. EO-05-01: PJM Interconnection, L.L.C. and PEPCO Holdings, Inc. is hereby providing you with additional information concerning...

  7. Department of Energy Employee Concerns Program Guide

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

    1999-02-01T23:59:59.000Z

    The Department of Energy (DOE) recognizes that free and open expression of DOE Federal and contractor and subcontractor employee concerns is essential to safe and efficient accomplishment of DOE's missions. DOE employees and any contractor or subcontractor fulfilling DOE's mission have the right and responsbility to report concerns relating to the environment, safety, health, or management of Department operations. The guide provides methods of implementing requirements of DOE O 442.1.

  8. A quantum peek inside the black hole event horizon

    E-Print Network [OSTI]

    Sumanta Chakraborty; Suprit Singh; T. Padmanabhan

    2015-03-14T23:59:59.000Z

    We solve the Klein-Gordon equation for a scalar field, in the background geometry of a dust cloud collapsing to form a black hole, everywhere in the (1+1) spacetime: that is, both inside and outside the event horizon and arbitrarily close to the curvature singularity. This allows us to determine the regularized stress tensor expectation value, everywhere in the appropriate quantum state (viz., the Unruh vacuum) of the field. We use this to study the behaviour of energy density and the flux measured in local inertial frames for the radially freely falling observer at any given event. Outside the black hole, energy density and flux lead to the standard results expected from the Hawking radiation emanating from the black hole, as the collapse proceeds. Inside the collapsing dust ball, the energy densities of both matter and scalar field diverge near the singularity in both (1+1) and (1+3) spacetime dimensions; but the energy density of the field dominates over that of classical matter. In the (1+3) dimensions, the total energy (of both scalar field and classical matter) inside a small spatial volume around the singularity is finite (and goes to zero as the size of the region goes to zero) but the total energy of the quantum field still dominates over that of the classical matter. Inside the event horizon, but \\textit{outside} the collapsing matter, freely falling observers find that the energy density and the flux diverge close to the singularity. In this region, even the integrated energy inside a small spatial volume enclosing the singularity diverges. This result holds in both (1+1) and (1+3) spacetime dimensions with a \\emph{milder} divergence for the total energy inside a small region in (1+3) dimensions. These results suggest that the back-reaction effects are significant even in the region \\emph{outside the matter but inside the event horizon}, close to the singularity.

  9. Complete single-horizon quantum corrected black hole spacetime

    SciTech Connect (OSTI)

    Peltola, Ari; Kunstatter, Gabor [Department of Physics and Winnipeg Institute for Theoretical Physics, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, R3B 2E9 (Canada)

    2009-03-15T23:59:59.000Z

    We show that a semiclassical polymerization of the interior of Schwarzschild black holes gives rise to a tantalizing candidate for a nonsingular, single-horizon black hole spacetime. The exterior has nonzero quantum stress energy but closely approximates the classical spacetime for macroscopic black holes. The interior exhibits a bounce at a microscopic scale and then expands indefinitely to a Kantowski-Sachs spacetime. Polymerization therefore removes the singularity and produces a scenario reminiscent of past proposals for universe creation via quantum effects inside a black hole.

  10. DOE's Portal to Deepwater Horizon Oil Spill Data

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

    On April 20, 2010, the Deepwater Horizon platform in the Gulf of Mexico exploded. The explosion and fire killed and injured workers on the oil rig, and caused major releases of oil and gas into the Gulf for several months. The Department of Energy, in keeping with the Obama Administrations ongoing commitment to transparency, provided online access to data and information related to the response to the BP oil spill. Included are schematics, pressure tests, diagnostic results, video clips, and other data. There are also links to the Restore the Gulf website, to the trajectory forecasts from NOAA, and oil spill information from the Environmental Protection Agency.

  11. Horizon City, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to:Pennsylvania: EnergyHopkinsville, Kentucky:Horizon City,

  12. Horizon Wind Energy formerly Zilkha Renewable Energy | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to:Pennsylvania: EnergyHopkinsville, Kentucky:Horizon

  13. Horizon Fuel Cell Technologies Pte Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup | Open EnergyInformationHorizon Fuel Cell Technologies Pte Ltd Jump

  14. Extremal Rotating Black Holes in the Near-Horizon Limit: Phase Space and Symmetry Algebra

    E-Print Network [OSTI]

    Compère, G; Seraj, A; Sheikh-Jabbari, M M

    2015-01-01T23:59:59.000Z

    We construct the NHEG phase space, the classical phase space of Near-Horizon Extremal Geometries with fixed angular momenta and entropy, and with the largest symmetry algebra. We focus on vacuum solutions to $d$ dimensional Einstein gravity. Each element in the phase space is a geometry with $SL(2,R)\\times U(1)^{d-3}$ Killing isometries which has vanishing $SL(2,R)$ and constant $U(1)$ charges. We construct an on-shell vanishing symplectic structure, which leads to an infinite set of symplectic symmetries. In four spacetime dimensions, the phase space is unique and the symmetry algebra consists of the familiar Virasoro algebra, while in $d > 4$ dimensions the symmetry algebra, the NHEG algebra, contains infinitely many Virasoro subalgebras. The nontrivial central term of the algebra is proportional to the black hole entropy. This phase space and in particular its symmetries might serve as a basis for a semiclassical description of extremal rotating black hole microstates.

  15. Black Hole spin dependence of general relativistic multi-transonic accretion close to the horizon

    E-Print Network [OSTI]

    Tapas K. Das; Sankhasubhra Nag; Swathi Hegde; Sourav Bhattacharya; Ishita Maity; Bozena Czerny; Paramita Barai; Paul J. Wiita; Vladimir Karas; Tapan Naskar

    2014-12-31T23:59:59.000Z

    We introduce a novel formalism to investigate the role of the spin angular momentum of astrophysical black holes in influencing the behaviour of low angular momentum general relativistic accretion. We propose a metric independent analysis of axisymmetric general relativistic flow, and consequently formulate the space and time dependent equations describing the general relativistic hydrodynamic accretion flow in the Kerr metric. The associated stationary critical solutions for such flow equations are provided and the stability of the stationary transonic configuration is examined using an elegant linear perturbation technique. We examine the properties of infalling material for both prograde and retrograde accretion as a function of the Kerr parameter at extremely close proximity to the event horizon. Our formalism can be used to identify a new spectral signature of black hole spin, and has the potential of performing the black hole shadow imaging corresponding to the low angular momentum accretion flow.

  16. Implementing an apparent-horizon finder in three dimensions

    E-Print Network [OSTI]

    Thomas W. Baumgarte; Gregory B. Cook; Mark A. Scheel; Stuart L. Shapiro; Saul A. Teukolsky

    1996-06-06T23:59:59.000Z

    Locating apparent horizons is not only important for a complete understanding of numerically generated spacetimes, but it may also be a crucial component of the technique for evolving black-hole spacetimes accurately. A scheme proposed by Libson et al., based on expanding the location of the apparent horizon in terms of symmetric trace-free tensors, seems very promising for use with three-dimensional numerical data sets. In this paper, we generalize this scheme and perform a number of code tests to fully calibrate its behavior in black-hole spacetimes similar to those we expect to encounter in solving the binary black-hole coalescence problem. An important aspect of the generalization is that we can compute the symmetric trace-free tensor expansion to any order. This enables us to determine how far we must carry the expansion to achieve results of a desired accuracy. To accomplish this generalization, we describe a new and very convenient set of recurrence relations which apply to symmetric trace-free tensors.

  17. Residence Coordinator Agreement Concerning University Provided Housing

    E-Print Network [OSTI]

    Howitt, Ivan

    Residence Coordinator Agreement Concerning University Provided Housing I understand-campus apartments and provides such housing. My acceptance of employment also constitutes my agreement to the following terms related to housing provided to me by the University: 1. I agree to make no substantial

  18. Emerging National Concerns for Higher Education

    E-Print Network [OSTI]

    Emerging National Concerns for Higher Education (and Welcome Back) 2014 Annual Faculty Conference old news The STEM tide has been kind to us The Energy boom plays to our strengths #12;7 Public debt capacity for campuses July 2014, Moody's "negative outlook for US Higher Education What

  19. Modeling Contextual Concerns in Enterprise Architecture

    E-Print Network [OSTI]

    Modeling Contextual Concerns in Enterprise Architecture Gonc¸alo Antunes, Jos´e Barateiro Vienna University of Technology, Vienna, Austria Abstract--Enterprise Architecture approaches are used in an architecture. Thus, an effective Enterprise Architecture ap- proach assists in the management of relations

  20. INDUSTRIAL ENGINEERING Industrial engineering is concerned

    E-Print Network [OSTI]

    INDUSTRIAL ENGINEERING Industrial engineering is concerned with looking at the "big picture" of systems that allow organizations and individuals to perform at their best. Industrial engineers bridge should be used and how they should be used. The focus of industrial engineering is on process improvement

  1. INDUSTRIAL ENGINEERING Industrial engineering is concerned

    E-Print Network [OSTI]

    INDUSTRIAL ENGINEERING Industrial engineering is concerned with looking at the "big picture" of systems that allow organizations and individuals to perform at their best. Industrial engineers bridge should be used and how they should be used. Industrial engineers design and run the factories and systems

  2. FLORIDA STATE UNIVERSITY STATEMENT CONCERNING OUTSIDE EMPLOYMENT

    E-Print Network [OSTI]

    Weston, Ken

    FLORIDA STATE UNIVERSITY STATEMENT CONCERNING OUTSIDE EMPLOYMENT A&P/USPS/OPS · It is understood that this employment will not interfere with my regular work and is consistent with the laws and regulations required to disclose to Florida State University any other employment information for which I am being paid

  3. Storm Water Quality Please report any concerns,

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Storm Water Quality Hotline: Please report any concerns, illegal dumping into storm drains, or suspicious activities that may cause environmental harm to the Storm Water Quality Hotline: (831) 4592553) 4594520 http://cleanwater.ucsc.edu Volunteer and intern with the Storm Water Management Program

  4. Cloud Security: Issues and Concerns Pierangela Samarati*

    E-Print Network [OSTI]

    Samarati, Pierangela

    1 Cloud Security: Issues and Concerns Authors Pierangela Samarati* Università degli Studi di Milano, Italy sabrina.decapitani@unimi.it Keywords cloud security confidentiality integrity availability secure data storage and processing Summary The cloud has emerged as a successful computing paradigm

  5. Time Domain Partitioning of Electricity Production Cost Simulations

    SciTech Connect (OSTI)

    Barrows, C.; Hummon, M.; Jones, W.; Hale, E.

    2014-01-01T23:59:59.000Z

    Production cost models are often used for planning by simulating power system operations over long time horizons. The simulation of a day-ahead energy market can take several weeks to compute. Tractability improvements are often made through model simplifications, such as: reductions in transmission modeling detail, relaxation of commitment variable integrality, reductions in cost modeling detail, etc. One common simplification is to partition the simulation horizon so that weekly or monthly horizons can be simulated in parallel. However, horizon partitions are often executed with overlap periods of arbitrary and sometimes zero length. We calculate the time domain persistence of historical unit commitment decisions to inform time domain partitioning of production cost models. The results are implemented using PLEXOS production cost modeling software in an HPC environment to improve the computation time of simulations while maintaining solution integrity.

  6. Delivery Cost Approximations for Inventory Routing Problems in a Rolling Horizon Framework

    E-Print Network [OSTI]

    Jaillet, Patrick

    Paris cedex 07, France. Supported in part by ONR, Discrete Mathematics Division, grant N00014 is concerned with the repeated distribution of a commodity, such as heating oil, over a long period of time inventory of the commodity. Their consumption varies daily and cannot be predicted deterministically

  7. Did the northeastern Gulf of Mexico become greener after the Deepwater Horizon oil spill?

    E-Print Network [OSTI]

    Meyers, Steven D.

    #12;Did the northeastern Gulf of Mexico become greener after the Deepwater Horizon oil spill; published 3 May 2011. [1] Assessment of direct and indirect impacts of oil and dispersants on the marine ecosystem in the northeastern Gulf of Mexico (NEGOM) from the Deepwater Horizon oil spill (April ­ July 2010

  8. Pressure Solution: Possible Mechanism for Silicate Grain Dissolution in a Petrocalcic Horizon

    E-Print Network [OSTI]

    Ahmad, Sajjad

    Pressure Solution: Possible Mechanism for Silicate Grain Dissolution in a Petrocalcic Horizon H in southern New Mexico, up to 58% of the silicate grains have dissolution fea- tures, such as embayed-solution mechanism in the petrocaIcic horizon: (i) silicate grains are smooth where they contact pores, but serrated

  9. Managerial Incentive Horizons and the Quality of Firms' Information Environments Jianxin (Daniel) Chi

    E-Print Network [OSTI]

    in the short-term speculative component of the stock price. Current shareholders benefit from the option` information environments. When a firm`s managerial incentive horizon is short, it is more likely to report are consistent with the hypothesis that short incentive horizons induce managers to adopt strategies that reduce

  10. Genomic and physiological footprint of the Deepwater Horizon oil spill on resident marsh fishes

    E-Print Network [OSTI]

    Whitehead, Andrew

    ­9, 2010), during the peak of oil landfall (June 28­30, 2010), and after much of the surface oilGenomic and physiological footprint of the Deepwater Horizon oil spill on resident marsh fishes June 13, 2011) The biological consequences of the Deepwater Horizon oil spill are unknown, especially

  11. Deepwater Horizon oil left tuna, other species with heart defects likely to prove fatal

    E-Print Network [OSTI]

    Grosell, Martin

    shows that the 2010 BP oil spill spawned deformities in bluefin tuna thereby impeding their ability Horizon oil spill struck at the very heart of fish, a new study says. Exposed to millions of gallons anniversary of the Exxon Valdez oil spill in Alaska's Prince William Sound. Oil from Deepwater Horizon spill

  12. Office of Response and Restoration Emergency Response Division Deepwater Horizon BP Oil Spill

    E-Print Network [OSTI]

    Office of Response and Restoration · Emergency Response Division Deepwater Horizon BP Oil Spill result if oil spilling from the Deepwater Horizon site continues until a relief well successfully stops based on a scenario that assumes a significant continuing spill. Some of these impacts may be weeks

  13. Chemical fingerprinting of petroleum biomarkers in Deepwater Horizon oil spill samples collected from Alabama shoreline

    E-Print Network [OSTI]

    Clement, Prabhakar

    Chemical fingerprinting of petroleum biomarkers in Deepwater Horizon oil spill samples collected of Civil Engineering, Auburn University, Auburn, AL 36849, USA a r t i c l e i n f o Keywords: BP oil spill Deepwater Horizon oil spill Hopane analysis Fingerprinting Tar balls a b s t r a c t We compare

  14. Statistics of black hole radiance and the horizon area spectrum

    E-Print Network [OSTI]

    Bekenstein, Jacob D

    2015-01-01T23:59:59.000Z

    The statistical response of a Kerr black hole to incoming quantum radiation has heretofore been studied by the methods of maximum entropy or quantum field theory in curved spacetime. Neither approach pretends to take into account the quantum structure of the black hole itself. To address this last issue we calculate here the conditional probability distribution associated with the hole's response by assuming that the horizon area has a discrete quantum spectrum, and that its quantum evolution corresponds to jumps between adjacent area eigenvalues, possibly occurring in series, with consequent emission or absorption of quanta, possibly in the same mode. This "atomic" model of the black hole is implemented in two different ways and recovers the previously calculated radiation statistics in both cases. The corresponding conditional probably distribution is here expressed in closed form in terms of an hypergeometric function.

  15. Lithophysal Rock Mass Mechanical Properties of the Repository Host Horizon

    SciTech Connect (OSTI)

    D. Rigby

    2004-11-10T23:59:59.000Z

    The purpose of this calculation is to develop estimates of key mechanical properties for the lithophysal rock masses of the Topopah Spring Tuff (Tpt) within the repository host horizon, including their uncertainties and spatial variability. The mechanical properties to be characterized include an elastic parameter, Young's modulus, and a strength parameter, uniaxial compressive strength. Since lithophysal porosity is used as a surrogate property to develop the distributions of the mechanical properties, an estimate of the distribution of lithophysal porosity is also developed. The resulting characterizations of rock parameters are important for supporting the subsurface design, developing the preclosure safety analysis, and assessing the postclosure performance of the repository (e.g., drift degradation and modeling of rockfall impacts on engineered barrier system components).

  16. Thermodynamics of Evolving Lorentzian Wormhole at Apparent and Event Horizons

    E-Print Network [OSTI]

    Ujjal Debnath; Mubasher Jamil; R. Myrzakulov; M. Akbar

    2012-04-06T23:59:59.000Z

    We have investigated the non-static Lorentzian Wormhole model in presence of anisotropic pressure. We have presented some exact solutions of Einstein equations for anisotropic pressure case. Introducing two EoS parameters we have shown that these solutions give very rich dynamics of the universe yielding to the different expansion history of it in the $r$ - direction and in the $T$ - direction. The corresponding explicit forms of the shape function $b(r)$ is presented.We have shown that the Einstein's field equations and unified first law are equivalent for the dynamical wormhole model. The first law of thermodynamics has been derived by using the Unified first law. The physical quantities including surface gravity and the temperature are derived for the wormhole. Here we have obtained all the results without any choice of the shape function. The validity of generalized second law (GSL) of thermodynamics has been examined at apparent and event horizons for the evolving Lorentzian wormhole.

  17. Gaseous analytes of concern at Hanford Tank Farms. Topical report

    SciTech Connect (OSTI)

    NONE

    1996-03-01T23:59:59.000Z

    Large amounts of toxic and radioactive waste materials are stored in underground tanks at DOE sites. When the vapors in the tank headspaces vent to the open atmosphere a potentially dangerous situation can occur for personnel in the area. An open-path atmospheric pollution monitor is being developed for DOE to monitor the open air space above these tanks. In developing this monitor it is important to know what hazardous gases are most likely to be found in dangerous concentrations. These gases are called the Analytes of Concern. At the present time, measurements in eight tanks have detected thirty-one analytes in at least two tanks and fifteen analytes in only one tank. In addition to these gases, Carbon tetrachloride is considered to be an Analyte of Concern because it permeates the ground around the tanks. These Analytes are described and ranked according to a Hazard Index which combines their vapor pressure, density, and approximate danger level. The top sixteen ranked analytes which have been detected in at least two tanks comprise an {open_quotes}Analytes of Concern Test List{close_quotes} for determining the system performance of the atmospheric pollution monitor under development. A preliminary examination of the infrared spectra, barring atmospheric interferences, indicates that: The pollution monitor will detect all forty-seven Analytes!

  18. Letter from Commonwealth to Mirant Potomac River Concerning Serious...

    Energy Savers [EERE]

    to Mirant Potomac River Concerning Serious Violations of the National Ambient Air Quality Standards for Sulfur Dioxide Letter from Commonwealth to Mirant Potomac River Concerning...

  19. Meeting Concerning Potential Test Procedures and Energy Conservation...

    Energy Savers [EERE]

    Meeting Concerning Potential Test Procedures and Energy Conservation Standards for Set-Top Boxes and Network Equipment Meeting Concerning Potential Test Procedures and Energy...

  20. Draft Addendum to Environmental Review Documents Concerning Exports...

    Energy Savers [EERE]

    Draft Addendum to Environmental Review Documents Concerning Exports of Natural Gas from the United States Draft Addendum to Environmental Review Documents Concerning Exports of...

  1. Forty Most Asked Questions Concerning CEQ's National Environmental...

    Energy Savers [EERE]

    Forty Most Asked Questions Concerning CEQ's National Environmental Policy Act Regulations Forty Most Asked Questions Concerning CEQ's National Environmental Policy Act Regulations...

  2. Native American Concerns | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRoseConcerns Jump to: navigation, search Retrieved from

  3. hal-00144535,version1-3May2007 Cosmological energy in a thermo-horizon and the

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the first law and the definition of the total energy contained inside the horizon. This contradiction, 8] and the definition of the energy contained inside the horizon, independently of the choice from the first law and the definition of the energy inside the horizon. We then show

  4. HANFORD CHEMICAL VAPORS WORKER CONCERNS & EXPOSURE EVALUATION

    SciTech Connect (OSTI)

    ANDERSON, T.J.

    2006-12-20T23:59:59.000Z

    Chemical vapor emissions from underground hazardous waste storage tanks on the Hanford site in eastern Washington State are a potential concern because workers enter the tank farms on a regular basis for waste retrievals, equipment maintenance, and surveillance. Tank farm contractors are in the process of retrieving all remaining waste from aging single-shell tanks, some of which date to World War II, and transferring it to newer double-shell tanks. During the waste retrieval process, tank farm workers are potentially exposed to fugitive chemical vapors that can escape from tank headspaces and other emission points. The tanks are known to hold more than 1,500 different species of chemicals, in addition to radionuclides. Exposure assessments have fully characterized the hazards from chemical vapors in half of the tank farms. Extensive sampling and analysis has been done to characterize the chemical properties of hazardous waste and to evaluate potential health hazards of vapors at the ground surface, where workers perform maintenance and waste transfer activities. Worker concerns. risk communication, and exposure assessment are discussed, including evaluation of the potential hazards of complex mixtures of chemical vapors. Concentrations of vapors above occupational exposure limits-(OEL) were detected only at exhaust stacks and passive breather filter outlets. Beyond five feet from the sources, vapors disperse rapidly. No vapors have been measured above 50% of their OELs more than five feet from the source. Vapor controls are focused on limited hazard zones around sources. Further evaluations of vapors include analysis of routes of exposure and thorough analysis of nuisance odors.

  5. New Horizons for Hydrogen: Producing Hydrogen from Renewable Resources

    SciTech Connect (OSTI)

    Not Available

    2011-02-01T23:59:59.000Z

    Recent events have reminded us of the critical need to transition from crude oil, coal, and natural gas toward sustainable and domestic sources of energy. One reason is we need to strengthen our economy. In 2008 we saw the price of oil reach a record $93 per barrel. With higher oil prices, growing demand for gasoline, and increasing oil imports, an average of $235 billion per year, has left the United States economy to pay for foreign oil since 2005, or $1.2 trillion between 2005 and 2009. From a consumer perspective, this trend is seen with an average gasoline price of $2.50 per gallon since 2005, compared to an average of $1.60 between 1990 and 2004 (after adjusting for inflation). In addition to economic impacts, continued reliance on fossil fuels increases greenhouse gas emissions that may cause climate change, health impacts from air pollution, and the risk of disasters such as the Deepwater Horizon oil spill. Energy efficiency in the form of more efficient vehicles and buildings can help to reduce some of these impacts. However, over the long term we must shift from fossil resources to sustainable and renewable energy sources.

  6. Dynamic Vehicle Routing for Translating Demands: Stability Analysis and Receding-Horizon Policies

    E-Print Network [OSTI]

    Bopardikar, Shaunak D.

    We introduce a problem in which demands arrive stochastically on a line segment, and upon arrival, move with a fixed velocity perpendicular to the segment. We design a receding horizon service policy for a vehicle with ...

  7. Expanding Research Horizons: USDA Forest Service Initiative for Developing Recycled Paper Technology

    E-Print Network [OSTI]

    Abubakr, Said

    Forest Service research on recycling is being led by scientists at the Forest Products Laboratory (FPLExpanding Research Horizons: USDA Forest Service Initiative for Developing Recycled Paper Technology Theodore L. Laufenberg, Program Manager Forest Products Conservation and Recycling Said Abubakr

  8. Concerns in Marine Renewable Energy Projects

    SciTech Connect (OSTI)

    Sharon Kramer, Mirko Previsic, Peter Nelson, Sheri Woo

    2010-06-17T23:59:59.000Z

    To accelerate the adoption of these emerging marine hydrokinetic technologies, navigational and environmental issues and concerns must be identified and addressed. As hydrokinetic projects move forward, various stakeholders will need to be engaged; one of the key issues that project proponents face as they engage stakeholders is that many conflicting uses and environmental issues are not well-understood. Much of this lack of understanding comes from a limited understanding of the technologies themselves. To address this issue, in September 2008, RE Vision consulting, LLC, was selected by the Department of Energy, under their market acceleration program, to apply a scenario-based assessment approach to the emerging hydrokinetic technology sector. The goal was to improve understanding of potential environmental and navigation impacts of these technologies and focus stakeholders on the critical issues. To meet this goal, the study established baseline scenarios for wave and tidal power conversion at potential future deployment sites. The scenarios captured variations in technical approaches and deployment scales and thus grounded the analysis in realistic constraints. The work conducted under this award provides an important foundation to other market acceleration activities carried out by the DoE and other stakeholders in this sector. The scenarios were then evaluated using a framework developed by H.T. Harvey & Associates to identify and characterize key environmental concerns and uncertainties. In collaboration with PCCI and the U.S. Coast Guard, navigation issues were assessed and guidelines developed to assure the safe operation of these systems. Finally, the work highlights “next steps” to take to continue development and adoption of marine hydrokinetic energy. Throughout the project, close collaboration with device developers, project developers and regulatory stakeholders was pursued to ensure that assumptions and constraints are realistic. Results concur with most of the permitting hurdles experienced by on-going projects in the U.S., and specific recommendations are provided for identifying and addressing them. While many areas of further research were identified, the study did not identify any major “show-stopper,” largely because these technologies have a relatively low environmental risk-profile if compared to other activities routinely permitted in the marine environment. The frameworks and representative scenarios developed provide an objective and transparent tool for stakeholders, regulators and developers to assist in the decision-making process for siting wave and tidal energy plants, and meet our goal of improving understanding between all stakeholders. The final product consists of three reports: Report 1 - Wave Energy Scenarios This report includes: - A technology characterization of four different wave energy technologies, including major technical specifications, device performance, and technical siting considerations - A site characterization of two potential deployment sites located in Hawaii and California - Outlines of device installation, O&M and decommissioning activities - Navigational demarcation requirements - Deployment Scenarios, identifying all the major life-cycle-related impacts Report 2 - Tidal Energy Scenarios This report includes: - A technology characterization of three tidal energy technologies, including major technical specifications, device performance, and technical siting considerations. - A site characterization of one potential deployment location in the Puget Sound, Washington - Outlines of device installation, O&M and decommissioning activities - Navigational demarcation requirements - Deployment Scenarios, identifying all the major life-cycle-related impacts Report 3 - Framework for Identifying Key Environmental Concerns This report describes frameworks for identifying key environmental effects and applies them to the wave and tidal energy deployment scenarios described in the first two reports. It highlights critical issues and recommendations for future research

  9. EFT Beyond the Horizon: Stochastic Inflation and How Primordial Quantum Fluctuations Go Classical

    E-Print Network [OSTI]

    C. P. Burgess; R. Holman; G. Tasinato; M. Williams

    2014-11-04T23:59:59.000Z

    We identify the effective theory describing inflationary super-Hubble scales and show it to be a special case of effective field theories appropriate to open systems. Open systems allow information to be exchanged between the degrees of freedom of interest and those that are integrated out, such as for particles moving through a fluid. Strictly speaking they cannot in general be described by an effective lagrangian; rather the appropriate `low-energy' limit is instead a Lindblad equation describing the evolution of the density matrix of the slow degrees of freedom. We derive the equation relevant to super-Hubble modes of quantum fields in near-de Sitter spacetimes and derive two implications. We show the evolution of the diagonal density-matrix elements quickly approaches the Fokker-Planck equation of Starobinsky's stochastic inflationary picture. This provides an alternative first-principles derivation of this picture's stochastic noise and drift, as well as its leading corrections. (An application computes the noise for systems with a sub-luminal sound speed.) We argue that the presence of interactions drives the off-diagonal density-matrix elements to zero in the field basis. This shows why the field basis is the `pointer basis' for the decoherence of primordial quantum fluctuations while they are outside the horizon, thus allowing them to re-enter as classical fluctuations, as assumed when analyzing CMB data. The decoherence process is efficient, occurring after several Hubble times even for interactions as weak as gravitational-strength. Crucially, the details of the interactions largely control only the decoherence time and not the nature of the final late-time stochastic state, much as interactions can control the equilibration time for thermal systems but are largely irrelevant to the properties of the resulting equilibrium state.

  10. Horizon Mechanics and Asymptotic Symmetries with a Immirzi-like Parameter in 2+1 Dimensions

    E-Print Network [OSTI]

    Rudranil Basu; Ayan Chatterjee

    2011-04-06T23:59:59.000Z

    Starting with a generalized theory of 2+1 gravity containing an Immirzi like parameter, we derive the modified laws of black hole mechanics using the formalism of weak isolated horizons. Definitions of horizon mass and angular momentum emerge naturally in this framework. We further go on to analyze the asymptotic symmetries, as first discussed by Brown and Henneaux, and analyze their implications in a completely covariant phase space framework.

  11. Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty

    E-Print Network [OSTI]

    Marquez, Ricardo

    2012-01-01T23:59:59.000Z

    photovoltaics for integeration with the electric power systems.photovoltaic systems. Progress In Photovoltaics, 16(3):241–

  12. Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty

    E-Print Network [OSTI]

    Marquez, Ricardo

    2012-01-01T23:59:59.000Z

    Solar irradiance data . . . . . . . . . . . . .Accuracy . . . . . . . . . . . . . . . . . Solar Resourcev Uncertainty In Solar Resource: Forecasting

  13. Turnpike sets in stochastic manufacturing systems with finite time horizon \\Lambda

    E-Print Network [OSTI]

    manu­ facturing systems. The main objective is to minimize an expected discounted cost of inventories the production plans be to meet a given fixed demand rate at the minimum cost of inventories and backlogs? A new the total inventory and backlog costs. In these two production planing problems, by taking the difference

  14. Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty

    E-Print Network [OSTI]

    Marquez, Ricardo

    2012-01-01T23:59:59.000Z

    Solar Irradiance And Power Output Variability In November 2009, UC Merced deployed a SunPower PV system provided with single axis tracking

  15. Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty

    E-Print Network [OSTI]

    Marquez, Ricardo

    2012-01-01T23:59:59.000Z

    119 Battery Storage System Applied To Mitigate Large Pvis performed for a battery storage system to mitigate the PVenergy customers. Battery Storage System Applied To Mitigate

  16. Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty

    E-Print Network [OSTI]

    Marquez, Ricardo

    2012-01-01T23:59:59.000Z

    in bulk, which is why many solar companies and utilities aresolar farms. Today it is widely acknowledged by power producers, utility companies and

  17. Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty

    E-Print Network [OSTI]

    Marquez, Ricardo

    2012-01-01T23:59:59.000Z

    119 Battery Storage System Applied To Mitigate Large Pvgenerated and battery power and actual PV power output for agenerated and battery power and actual PV power output for a

  18. Valuing modular nuclear power plants in finite time decision horizon Shashi Jain a,b,

    E-Print Network [OSTI]

    Oosterlee, Cornelis W. "Kees"

    into account the value of flexibility arising due to modular construction, which traditional valuation methods

  19. Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty

    E-Print Network [OSTI]

    Marquez, Ricardo

    2012-01-01T23:59:59.000Z

    114 Solar Irradiance And Power Output Variabilitytechniques for solar power output with no exogenous inputs.and their effect on solar power output. For large scale

  20. Thermal Conductivity of the Potential Repository Horizon Model Report

    SciTech Connect (OSTI)

    J. Ramsey

    2002-08-29T23:59:59.000Z

    The purpose of this report is to assess the spatial variability and uncertainty of thermal conductivity in the host horizon for the proposed repository at Yucca Mountain. More specifically, the lithostratigraphic units studied are located within the Topopah Spring Tuff (Tpt) and consist of the upper lithophysal zone (Tptpul), the middle nonlithophysal zone (Tptpmn), the lower lithophysal zone (Tptpll), and the lower nonlithophysal zone (Tptpln). The Tptpul is the layer directly above the repository host layers, which consist of the Tptpmn, Tptpll, and the Tptpln. Current design plans indicate that the largest portion of the repository will be excavated in the Tptpll (Board et al. 2002 [157756]). The main distinguishing characteristic among the lithophysal and nonlithophysal units is the percentage of large scale (cm-m) voids within the rock. The Tptpul and Tptpll, as their names suggest, have a higher percentage of lithophysae than the Tptpmn and the Tptpln. Understanding the influence of the lithophysae is of great importance to understanding bulk thermal conductivity and perhaps repository system performance as well. To assess the spatial variability and uncertainty of thermal conductivity, a model is proposed that is functionally dependent on the volume fraction of lithophysae and the thermal conductivity of the matrix portion of the rock. In this model, void space characterized as lithophysae is assumed to be air-saturated under all conditions, while void space characterized as matrix may be either water- or air-saturated. Lithophysae are assumed to be air-saturated under all conditions since the units being studied are all located above the water table in the region of interest, and the relatively strong capillary forces of the matrix will, under most conditions, preferentially retain any moisture present in the rock.

  1. Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre

    E-Print Network [OSTI]

    Sheperd Doeleman; Jonathan Weintroub; Alan E. E. Rogers; Richard Plambeck; Robert Freund; Remo P. J. Tilanus; Per Friberg; Lucy M. Ziurys; James M. Moran; Brian Corey; Ken H. Young; Daniel L. Smythe; Michael Titus; Daniel P. Marrone; Roger J. Cappallo; Douglas C. J. Bock; Geoffrey C. Bower; Richard Chamberlin; Gary R. Davis; Thomas P. Krichbaum; James Lamb; Holly Maness; Arthur E. Niell; Alan Roy; Peter Strittmatter; Daniel Werthimer; Alan R. Whitney; David Woody

    2008-09-15T23:59:59.000Z

    The cores of most galaxies are thought to harbour supermassive black holes, which power galactic nuclei by converting the gravitational energy of accreting matter into radiation (ref 1). Sagittarius A*, the compact source of radio, infrared and X-ray emission at the centre of the Milky Way, is the closest example of this phenomenon, with an estimated black hole mass that is 4 million times that of the Sun (refs. 2,3). A long-standing astronomical goal is to resolve structures in the innermost accretion flow surrounding Sgr A* where strong gravitational fields will distort the appearance of radiation emitted near the black hole. Radio observations at wavelengths of 3.5 mm and 7 mm have detected intrinsic structure in Sgr A*, but the spatial resolution of observations at these wavelengths is limited by interstellar scattering (refs. 4-7). Here we report observations at a wavelength of 1.3 mm that set a size of 37 (+16, -10; 3-sigma) microarcseconds on the intrinsic diameter of Sgr A*. This is less than the expected apparent size of the event horizon of the presumed black hole, suggesting that the bulk of SgrA* emission may not be not centred on the black hole, but arises in the surrounding accretion flow.

  2. Nuisance Odors: Is there a Concern - 12340

    SciTech Connect (OSTI)

    Brounstein, Robert A. [TerranearPMC, Los Alamos New Mexico 87544 (United States)

    2012-07-01T23:59:59.000Z

    Nuisance odors are generally thought of as just being annoying or unpleasant and not causing any physiological harm to our internal organs or other biologic systems. Yet during an excavation of buried animal remains, field workers experienced a multitude of symptoms that are associated with exposures to toxic materials. An examination of the decomposition process revealed that there is a potential off-gassing of a number of common, yet harmful chemicals including ammonia, mercaptans, hydrogen sulfide, butyric acid and phenol. In addition, other compounds, that have limited information such as established health data and occupational exposure limits, were also potential contaminants-of-concern. While a variety of monitoring and sampling techniques were used to assess worker exposures, all results indicated non-detectable airborne concentrations. Nevertheless, workers were experiencing such symptoms as nausea and headaches. As such, protective measures were necessary for field personnel to continue work while having confidence that the project was instituting sincere steps to ensure their health and safety. Researching the possible reasons for the causes of workers exhibiting adverse health effects from nuisance odors revealed that such exposures initiate electrochemical pathways, starting from the olfactory bulb to the brain, followed by a transfer of information to such biologic systems as the hypothalamus and pituitary gland. These systems, in turn, secrete hormones that cause a number of involuntary reactions; many of which are observed as typical adverse health effects, when in fact, they are merely reactions caused by the brain's memory; most likely created from previous experiences to unpleasant odors. The concern then focuses of how the Occupational Safety and Health community shall respond to such workplace exposures. Future work in this area may need to focus on the viability of current occupational exposure limits and the possibility of revising these standards. Another area of consideration would be whether nuisance odors will need separate and distinct criteria with regards to hazard identification and control. While evidence suggests that odorants do not cause direct toxicological effects to the various biologic systems, they can be influential by initiating symptoms that are associated with known toxins. The difference between the classic toxic systemic reactions and those initiated by nuisance odors can be summarized as one causing a dysfunction of a target organ or system as opposed to triggering a message to the brain which causes a physical reaction. While strong odors may exist at HAZWOPER work sites, their particular risk of pathogenic disease has yet to be established. This leaves many unanswered questions; the most obvious being, 'can an odorous chemical that can result in headaches, nausea, changes in blood pressure, body temperature, etc., be considered a toxin even if biological systems remain unaffected and sampling/monitoring protocol negative stimuli, thereby causing symptomatic experiences; will such disciplines as psychology need to be considered as part of the expertise within the field a environmental and occupational health? In the classic text, 'The Fundamentals of Industrial Hygiene' industrial hygiene has been defined as 'that science and art devoted to the anticipation, recognition, evaluation, and control of those environmental factors or stressors arising in or from the workplace that may cause sickness, impaired health and well-being, or significant discomfort among workers or among the citizens of the community'. Based on this definition, it is indeed the responsibility of the occupational health professional to move forward and to provide an effective program to 'anticipate, recognize, evaluate, and control' such airborne contaminants that may not be adequately controlled based on current knowledge and technology. The question is, 'Is the industrial hygiene community equipped to carry out this responsibility?' 'Are new assessment methods and tools necessary? Are alternate exposure

  3. Research and Development Concerning Coalbed Natural Gas

    SciTech Connect (OSTI)

    William Ruckelshaus

    2008-09-30T23:59:59.000Z

    The Powder River Basin in northeastern Wyoming is one of the most active areas of coalbed natural gas (CBNG) development in the western United States. This resource provides clean energy but raises environmental concerns. Primary among these is the disposal of water that is co-produced with the gas during depressurization of the coal seam. Beginning with a few producing wells in Wyoming's Powder River Basin (PRB) in 1987, CBNG well numbers in this area increased to over 13,600 in 2004, with projected growth to 20,900 producing wells in the PRB by 2010. CBNG development is continuing apace since 2004, and CBNG is now being produced or evaluated in four other Wyoming coal basins in addition to the PRB, with roughly 3500-4000 new CBNG wells permitted statewide each year since 2004. This is clearly a very valuable source of clean fuel for the nation, and for Wyoming the economic benefits are substantial. For instance, in 2003 alone the total value of Wyoming CBNG production was about $1.5 billion, with tax and royalty income of about $90 million to counties, $140 million to the state, and $27 million to the federal government. In Wyoming, cumulative CBNG water production from 1987 through December 2004 was just over 380,000 acre-feet (2.9 billion barrels), while producing almost 1.5 trillion cubic feet (tcf) of CBNG gas statewide. Annual Wyoming CBNG water production in 2003 was 74,457 acre-feet (577 million barrels). Total production of CBNG water across all Wyoming coal fields could total roughly 7 million acre-feet (55.5 billion barrels), if all of the recoverable CBNG in the projected reserves of 31.7 tcf were produced over the coming decades. Pumping water from coals to produce CBNG has been designated a beneficial water use by the Wyoming State Engineer's Office (SEO), though recently the SEO has limited this beneficial use designation by requiring a certain gas/water production ratio. In the eastern part of the PRB where CBNG water is generally of good quality, most of it is discharged to surface drainages or to soil (for irrigation). CBNG water quality generally declines when moving from the Cheyenne River drainage northwestward to the Belle Fourche, Little Powder, and Powder River drainages and in the central and western part of the PRB, most CBNG water goes to evaporation-infiltration ponds or is discharged directly to surface drainages. Concerns center on the salinity of the water, usually measured as total dissolved solids (TDS), or electrical conductivity (EC) and sodium adsorption ratio (SAR). Other management options currently in use include injection, managed irrigation (with additives to mitigate the effects of high salinity), atomization, and treatment by reverse osmosis or ion exchange. A key water quality issue is the cumulative effect of numerous CBNG water discharges on the overall water quality of basin streams. This leads to one of the most contentious issues in CBNG development in Wyoming's PRB: Montana's concern about the potential downstream effects of water quality degradation on rivers flowing north into Montana. Many of the benefits and costs associated with CBNG development have been debated, but dealing with CBNG water quantity and quality arguably has been the most difficult of all the issues. Given the importance of these issues for continued development of CBNG resources in Wyoming and elsewhere, the DOE-NETL funded project presented here focuses on CBNG co-produced water management. The research was organized around nine separate, but interrelated, technical project tasks and one administrative task (Task 1). The nine technical project tasks were pursued by separate research teams at the University of Wyoming, but all nine tasks were coordinated to the extent possible in order to maximize information gained about CBNG co-produced waters. In addition to project management in Task 1, the key research tasks included: (2) estimating groundwater recharge rates in the PRB; (3) groundwater contamination of trace elements from CBNG disposal ponds; (4) use of environmental tracers in assessing wate

  4. A Fast Moving Horizon Estimation Algorithm Based on Nonlinear ...

    E-Print Network [OSTI]

    2008-02-19T23:59:59.000Z

    dynamic system with long time delays due to the recycle loops and multiple compression stages. The only available ... hyper-compressor. The objective is to

  5. Anyonic statistics and large horizon diffeomorphisms for Loop Quantum Gravity Black Holes

    E-Print Network [OSTI]

    Andreas G. A. Pithis; Hans-Christian Ruiz Euler

    2015-03-24T23:59:59.000Z

    We investigate the role played by large diffeomorphisms of quantum Isolated Horizons for the statistics of LQG Black Holes by means of their relation to the braid group. To this aim the symmetries of Chern-Simons theory are recapitulated with particular regard to the aforementioned type of diffeomorphisms. For the punctured spherical horizon, these are elements of the mapping class group of $S^2$, which is almost isomorphic to a corresponding braid group on this particular manifold. The mutual exchange of quantum entities in two dimensions is achieved by the braid group, rendering the statistics anyonic. With this we argue that the quantum Isolated Horizon model of LQG based on $SU(2)_k$-Chern-Simons theory explicitly exhibits non-abelian anyonic statistics. In this way a connection to the theory behind the fractional quantum Hall effect and that of topological quantum computation is established, where non-abelian anyons play a significant role.

  6. Wave Properties of Plasma Surrounding the Event Horizon of a Non-Rotating Black Hole

    E-Print Network [OSTI]

    M. Sharif; G. Mustafa

    2008-09-09T23:59:59.000Z

    We have studied the wave properties of the cold and isothermal plasma in the vicinity of the Schwarzschild black hole event horizon. The Fourier analyzed perturbed 3+1 GRMHD equations are taken on the basis of which the complex dispersion relations are obtained for non-rotating, rotating non-magnetized and rotating magnetized backgrounds. The propagation and attenuation vectors along with the refractive index are obtained (shown in graphs) to study the dispersive properties of the medium near the event horizon. The results show that no information can be obtained from the Schwarzschild magnetosphere. Further, the pressure ceases the existence of normal dispersion of waves.

  7. Shenanigans at the black hole horizon: pair creation or Boulware accretion?

    E-Print Network [OSTI]

    Israel, Werner

    2015-01-01T23:59:59.000Z

    The current scenario of black hole evaporation holds that the Hawking energy flux $F$ is powered by pair creation at the horizon. However, pair creation produces entanglements, some of which must necessarily be broken before the black hole evaporates completely. That leads to loss of information and violation of unitarity. In this paper, an alternative scenario is suggested that reproduces the essential features of Hawking evaporation, but does not invoke pair creation with its attendant problems. In this "accreting Boulware" scenario, a positive flux $F$ is still an outflux at infinity, but near the horizon it becomes an influx of negative energy. This negative energy flux (marginally) satisfies the Flanagan energy inequality.

  8. New Horizons Science Photos from NASA's Pluto-Kuiper Belt Mission

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

    DOE provided the power supply for NASA's New Horizons Mission, a mission to the Pluto and Charon, a double-planet system, and the Kuiper Belt. There are 61 science photos posted on the New Horizons website, along with mission photos, spacecraft images, launch photos, posters and renderings that are both scientific and artistic. Dates range from June of 2006 to February of 2008. The images can be searched by keywords, by date, or by subject topic. They can also be browsed as an entire list. Each image has a detailed description.

  9. Thermodynamics of Evolving Lorentzian Wormholes at Apparent Horizon in $f(R)$ Theory of Gravity

    E-Print Network [OSTI]

    H. Saiedi

    2014-09-08T23:59:59.000Z

    In the context of modified $f(R)$ gravity, we attempt to study the thermodynamic properties of the evolving Lorentzian wormholes at the apparent horizon. It is shown that the wormhole can be derived from a particular $f(R)$ model in the radiation background. Moreover, it has been shown that the field equations can be cast to a similar form $dE = TdS + WdV + Td\\bar{S}$ at the apparent horizon for the evolving Lorentzian wormhole. Compared to the case of Einstein's general relativity, an additional term $Td\\bar{S}$ appears here.

  10. Mitigating Pollution Concerns through Process Integration Technology Steps

    E-Print Network [OSTI]

    Tripathi, P.; Shukla, D.; Smith, S.

    MITIGATING POLLUTION CONCERNS THROUGH PROCESS INTEGRATION TECHNOLOGY STEPS Paul Tripathi, D.Shukla TENSA Services, Houston, Tx and Steve Smith Duke Power, Charlotte, NC Abstract: With increasing concern to reduce the emission of SOx... of the studies to illustrate succesahow sful partnership can work. 1.0 Introduction: Over the past decade, there is an increasing concern for reducing environmental pollution. Some of the issues being addressed related to this topic...

  11. Hydraulic "Fracking": Are Surface Water Impacts An Ecological Concern?

    E-Print Network [OSTI]

    Hydraulic "Fracking": Are Surface Water Impacts An Ecological Concern? G. Allen Burton Jr; Fracking; Water-quality stressor; Ecological risk assessment Introduction The world's energy marketplace

  12. Session 6 - Environmentally Concerned Public Sector Panel Discussion...

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

    "The Light-Duty Diesel In America?" Session 6 - Environmentally Concerned Public Sector Panel Discussion "The Light-Duty Diesel In America?" 2003 DEER Conference...

  13. appraisal recurring concerns: Topics by E-print Network

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

    you accept there Terms and Conditions Krishnamoorthy, Kalimuthu 215 Hydraulic "Fracking": Are Surface Water Impacts An Ecological Concern? Geosciences Websites Summary:...

  14. assess perception concern: Topics by E-print Network

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

    you accept there Terms and Conditions Krishnamoorthy, Kalimuthu 400 Hydraulic "Fracking": Are Surface Water Impacts An Ecological Concern? Geosciences Websites Summary:...

  15. Summer 1986 Water Quality Leads List of Concerns at Water Workshop

    E-Print Network [OSTI]

    Nebraska-Lincoln, University of

    priority Water Quality - Residual retention times for toxic substances in the soil and water are unkn ownSummer 1986 Water Quality Leads List of Concerns at Water Workshop A lack of information concerni the synergistic and long-term effec ts of dimin - ished water qua lity. led a list of the top water prob lems

  16. Gravitational wave signatures of the absence of an event horizon: Nonradial oscillations of a thin-shell gravastar

    SciTech Connect (OSTI)

    Pani, Paolo [Dipartimento di Fisica, Universita di Cagliari, and INFN sezione di Cagliari, Cittadella Universitaria 09042 Monserrato (Italy); Berti, Emanuele [Department of Physics and Astronomy, The University of Mississippi, University, Mississippi 38677-1848 (United States); Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States); Cardoso, Vitor [Department of Physics and Astronomy, The University of Mississippi, University, Mississippi 38677-1848 (United States); Centro Multidisciplinar de Astrofisica - CENTRA, Departamento de Fisica, Instituto Superior Tecnico, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal); Chen Yanbei; Norte, Richard [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)

    2009-12-15T23:59:59.000Z

    Gravitational waves from compact objects provide information about their structure, probing deep into strong-gravity regions. Here we illustrate how the presence or absence of an event horizon can produce qualitative differences in the gravitational waves emitted by ultracompact objects. In order to set up a straw-man ultracompact object with no event horizon, but which is otherwise almost identical to a black hole, we consider a nonrotating thin-shell model inspired by Mazur and Mottola's gravastar, which has a Schwarzschild exterior, a de Sitter interior and an infinitely thin shell with finite tension separating the two regions. As viewed from the external space-time, the shell can be located arbitrarily close to the Schwarzschild radius, so a gravastar might seem indistinguishable from a black hole when tests are only performed on its external metric. We study the linearized dynamics of the system, and, in particular, the junction conditions connecting internal and external gravitational perturbations. As a first application of the formalism we compute polar and axial oscillation modes of a thin-shell gravastar. We show that the quasinormal mode spectrum is completely different from that of a black hole, even in the limit when the surface redshift becomes infinite. Polar quasinormal modes depend on the equation of state of matter on the shell and can be used to distinguish between different gravastar models. Our calculations suggest that low-compactness gravastars could be unstable when the sound speed on the shell v{sub s}/c > or approx. 0.92.

  17. Draft Horizon 2020 Work Programme 2014-2015 in the area of health, demographic change and wellbeing

    E-Print Network [OSTI]

    Greifswald, Ernst-Moritz-Arndt-Universität

    and wellbeing PART 8 - Page 2 of 96 Personalising health and care19 11 2013 Draft Horizon 2020 Work Programme 2014-2015 in the area of health, demographic change of the content of this document. #12;HORIZON 2020 ­ WORK PROGRAMME 2014-2015 Health, demographic change

  18. The 2010 Deepwater Horizon (DH) oil spill in the Gulf of Mexico was unprecedented in both its magnitude --nearly 5

    E-Print Network [OSTI]

    Entekhabi, Dara

    PROBLEM The 2010 Deepwater Horizon (DH) oil spill in the Gulf of Mexico was unprecedented in both of Mexico during the Deepwater Horizon oil spill. This satellite image shows the oil slick off its magnitude -- nearly 5 million barrels of oil spilled over nearly three months -- and its location

  19. National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling THE AMOUNT AND FATE OF THE OIL

    E-Print Network [OSTI]

    Meyers, Steven D.

    - 1 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling THE AMOUNT AND FATE OF THE OIL ---Draft--- Staff Working Paper No. 3 Staff Working Papers are written by the staff of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling for the use of members

  20. Study: Exposure to crude oil from the Deepwater Horizon disaster causes swimming deficiencies in juvenile mahi mahi

    E-Print Network [OSTI]

    Grosell, Martin

    , the 2010 Deepwater Horizon oil spill also had profound impacts on the open ocean and deep sea environmentStudy: Exposure to crude oil from the Deepwater Horizon disaster causes swimming deficiencies in juvenile mahi mahi Posted on June 12, 2014 by Bob Berwyn Evidence is mounting that BP's oil harmed millions

  1. Identification of radionuclides of concern in Hanford Site environmental cleanup

    SciTech Connect (OSTI)

    Perkins, R.W.; Jenquin, U.P.

    1994-08-01T23:59:59.000Z

    The purpose of this document is to consider which radionuclides should be included in conducting environmental surveys relative to site remediation at Hanford. During the operation of the Hanford site, the fission product radionuclides and a large number of activation products including the transuranic radionuclides were formed. The reactor operations and subsequent chemical processing and metallurgical operations resulted in the environmental release of gaseous and liquid effluents containing some radionuclides; however, the majority of the radionuclides were stored in waste tanks or disposed to trenches and cribs. Since some contamination of both soils and subsurface waters occurred, one must decide which radionuclides still remain in sufficient amounts to be of concern at the time when site remediation is to be complete. Many of the radionuclides which have constituted the principal hazard during site operation have half-lives on the order of a year or less; therefore, they will have decayed to insignificant amounts by the year 2030, a possible date for completion of the remediation process.

  2. Reserving and Scheduling Transmission over the Time Change -...

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

    Pacific Prevailing Time, BPA Transmission Services will set all clocks to Pacific Daylight Saving Time (Advanced Standard Time). For more information concerning how to submit...

  3. DATA CONCERN AWARE QUERYING FOR THE INTEGRATION OF DATA SERVICES

    E-Print Network [OSTI]

    Dustdar, Schahram

    DATA CONCERN AWARE QUERYING FOR THE INTEGRATION OF DATA SERVICES Muhammad Intizar Ali, Reinhard,dustdar}@infosys.tuwien.ac.at Keywords: Data Services, Database as a Service, Data Services Integration, Data Concerns, XQuery. Abstract: There is an increasing trend for organizations to publish data over the web using data services. The published data

  4. Giannini Foundation of Agricultural Economics New Horizons for Rural Reform in China

    E-Print Network [OSTI]

    Kammen, Daniel M.

    11 Giannini Foundation of Agricultural Economics New Horizons for Rural Reform in China: Resources a reform agenda to alleviate rural poverty and improve environmental sustainability in China. It focuses on labor reform, suggesting reductions in the work week and providing incentives aimed at encouraging exit

  5. Receding-horizon Supervisory Control of Green Buildings Truong X. Nghiem, George J. Pappas

    E-Print Network [OSTI]

    Pappas, George J.

    .S. Department of Energy. Consequently, there has been a growing interest in green buildings, i.e., energy]). For this reason, green buildings (i.e., energy-efficient buildings) have been of strong interest not onlyReceding-horizon Supervisory Control of Green Buildings Truong X. Nghiem, George J. Pappas

  6. Renormalized Vacuum Polarization on the Horizon of a Schwarzschild Black Hole Threaded by a Cosmic String

    E-Print Network [OSTI]

    Adrian Ottewill; Peter Taylor

    2010-06-30T23:59:59.000Z

    We obtain an analytic expression for the vacuum polarization on the horizon of the Schwarzschild black hole threaded by an infinite cosmic string. This calculation relies on a generalized Heine identity for Legendre functions which we derive without using specific properties of the Legendre functions themselves.

  7. Dark Clouds on the Horizon: Using Cloud Storage as Attack Vector and Online Slack Space

    E-Print Network [OSTI]

    Dark Clouds on the Horizon: Using Cloud Storage as Attack Vector and Online Slack Space Martin this as online slack space. We conclude by discussing security improvements for mod- ern online storage services protocol. With the advent of cloud computing and the shared usage of resources, these centralized storage

  8. An Experimental Study of Stabilizing Receding Horizon Control of Visual Feedback System with Planar Manipulators

    E-Print Network [OSTI]

    manipulator with a camera. The behavior of receding horizon control is almost same as inverse optimal control proposed a Lyapunov based visual feedback control with a planar manipulator [6]. Recently, the inverse cost are given by the control Lyapunov function. The inverse optimal control for the planar manipulator

  9. Disturbance and Recovery of Salt Marsh Arthropod Communities following BP Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    Pennings, Steven C.

    Disturbance and Recovery of Salt Marsh Arthropod Communities following BP Deepwater Horizon Oil of Houston, Houston, Texas, United States of America Abstract Oil spills represent a major environmental.S. Gulf of Mexico is a hub of oil and gas exploration activities that historically have impacted

  10. A problem of hypothetical emerging of matter objects on horizon in the standard model of universe

    E-Print Network [OSTI]

    V. Skalsky

    2000-09-25T23:59:59.000Z

    In the standard model of universe the increase in mass of our observed expansive Universe is explained by the assumption of emerging the matter objects on the horizon (of the most remote visibility). However, the physical analysis of the influence of this assumption on the velocity of matter objects shows unambiguously that this hypothetical assumption contradicts the theory of gravity.

  11. WHEN GLACIERS BREAK THE ICE BETWEEN SEVERAL SCIENTIFIC HORIZONS T. Landes, P. Grussenmeyer, M. Koehl

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    WHEN GLACIERS BREAK THE ICE BETWEEN SEVERAL SCIENTIFIC HORIZONS T. Landes, P. Grussenmeyer, M temperate glacier activity. For this ambitious purpose, it was necessary to reassemble specialists coming glaciers was a unique opportunity for the MAP-PAGE team, specialized in geodetic surveying and imaging

  12. Proof of linear instability of the Reissner-Nordström Cauchy horizon under scalar perturbations

    E-Print Network [OSTI]

    Jonathan Luk; Sung-Jin Oh

    2015-01-19T23:59:59.000Z

    It has long been suggested that solutions to linear scalar wave equation $$\\Box_g\\phi=0$$ on a fixed subextremal Reissner-Nordstr\\"om spacetime with non-vanishing charge are generically singular at the Cauchy horizon. We prove that generic smooth and compactly supported initial data on a Cauchy hypersurface indeed give rise to solutions with infinite nondegenerate energy near the Cauchy horizon in the interior of the black hole. In particular, the solution generically does not belong to $W^{1,2}_{loc}$. This instability is related to the celebrated blue shift effect in the interior of the black hole. The problem is motivated by the strong cosmic censorship conjecture and it is expected that for the full nonlinear Einstein-Maxwell system, this instability leads to a singular Cauchy horizon for generic small perturbations of Reissner-Nordstr\\"om spacetime. Moreover, in addition to the instability result, we also show as a consequence of the proof that Price's law decay is generically sharp along the event horizon.

  13. Soil animal communities in holm oak forests: influence of horizon, altitude and year

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Soil animal communities in holm oak forests: influence of horizon, altitude and year Nassima-francois.ponge@wanadoo.fr Running title: Soil animals in holm oak forests hal-00498459,version1-7Jul2010 Author manuscript, published in "European Journal of Soil Biology 39, 4 (2003) 197-207" DOI : 10.1016/j.ejsobi.2003.06.001 #12

  14. New insights into microbial responses to oil spills from the Deepwater Horizon incident

    SciTech Connect (OSTI)

    Mason, O.U.; Hazen, T.C.

    2011-06-15T23:59:59.000Z

    On April 20, 2010, a catastrophic eruption of methane caused the Deepwater Horizon exploratory drill rig drilling the Macondo Well in Mississippi Canyon Block 252 (MC252) to explode. The Deepwater Horizon oil spill was unprecendeted for several reasons: the volume of oil released; the spill duration; the well depth; the distance from the shore-line (77 km or about 50 miles); the type of oil (light crude); and the injection of dispersant directly at the wellhead. This study clearly demonstrated that there was a profound and significant response by certain members of the in situ microbial community in the deep-sea in the Gulf of Mexico. In particular putative hydrocarbon degrading Bacteria appeared to bloom in response to the Deepwater Horizon oil spill, even though the temperature at these depths is never >5 C. As the plume aged the shifts in the microbial community on a temporal scale suggested that different, yet metabolically important members of the community were able to respond to a myriad of plume constituents, e.g. shifting from propane/ethane to alkanes and finally to methane. Thus, the biodegradation of hydrocarbons in the plume by Bacteria was a highly significant process in the natural attenuation of many compounds released during the Deepwater Horizon oil spill.

  15. Decay of correlations for flows with unbounded roof function, including the infinite horizon planar

    E-Print Network [OSTI]

    Decay of correlations for flows with unbounded roof function, including the infinite horizon planar for studying nonuniformly hyperbolic flows with unbounded roof functions. In particular, we establish the decay of other classes of flows with unbounded roof functions. For geometric Lorenz attractors (in- cluding

  16. Decay of correlations for flows with unbounded roof function, including the infinite horizon planar

    E-Print Network [OSTI]

    Decay of correlations for flows with unbounded roof function, including the infinite horizon planar for studying nonuniformly hyperbolic flows with unbounded roof functions. In particular, we establish the decay of other classes of flows with unbounded roof functions. For geometric Lorenz attractors (in­ cluding

  17. Many Task Computing for Modeling the Fate of Oil Discharged from the Deep Water Horizon Well

    E-Print Network [OSTI]

    tons of crude oil into the Gulf of Mexico. In order to understand the fate and impact of the discharged, causing the riser pipe to rupture and crude oil to flow into the Gulf of Mexico from an approximate depthMany Task Computing for Modeling the Fate of Oil Discharged from the Deep Water Horizon Well

  18. Characterization of Doppler Effects in the Context of Over-the-Horizon Radar

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Characterization of Doppler Effects in the Context of Over-the-Horizon Radar Cornel Ioana Grenoble addresses the problem of the characterization of Doppler effect of maneuvering targets in the context reveals the Doppler effects characterizing the target's trajectory. Analysis of such signals

  19. Estimating Surface Oil Extent from the Deepwater Horizon Oil Spill using ASCAT Backscatter

    E-Print Network [OSTI]

    Long, David G.

    Estimating Surface Oil Extent from the Deepwater Horizon Oil Spill using ASCAT Backscatter Richard Provo, UT 84602 Abstract--The damping effects of oil on capillary ocean waves alter the backscattered backscatter from the ocean surface uncontaminated by surface oil. Large differences between expected

  20. Level and Degradation of Deepwater Horizon Spilled Oil in Coastal Marsh Sediments and Pore-Water

    E-Print Network [OSTI]

    Wang, Yang

    Level and Degradation of Deepwater Horizon Spilled Oil in Coastal Marsh Sediments and Pore the 2010 BP Macondo-1 well oil spill. Very high levels (10-28%) of organic carbon within the heavily oiled chromatograph spectra are in a remarkable narrow range among spilled oils and initial BP crude. At oiled sites

  1. Introduction Zonation, the clustering of organisms into distinct horizon-

    E-Print Network [OSTI]

    Gilman, Sarah

    of climate change. Harley and Helmuth (Limnol. Oceanogr. 48:1498-1508, 2003) described a method for measuring in ecological studies as indicators of com- parable environmental conditions across locations or over time (e.g., Johannesson et al. 1995, Gilman 2005). Zonation is thought to reflect changes in patterns of emersion

  2. New Horizons in Earth Reinforcement Otani, Miyata & Mukunoki (eds) 2008 Taylor & Francis Group, London, ISBN 978-0-415-45775-0

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    , London, ISBN 978-0-415-45775-0 New horizons in reinforced soil technology J.G. Zornberg The University

  3. Radiolysis Concerns for Water Shielding in Fission Surface Power Applications

    SciTech Connect (OSTI)

    Schoenfeld, Michael P. [NASA Marshall Space Flight Center, ER24, MSFC, AL 35812 (United States); Anghaie, Samim [Innovative Space Power and Propulsion Institute, 800 SW Archer Rd. Bldg.554, P.O. Box 116502, University of Florida, Gainesville, FL 32611-6502 (United States)

    2008-01-21T23:59:59.000Z

    This paper presents an overview of radiolysis concerns with regard to water shields for fission surface power. A review of the radiolysis process is presented and key parameters and trends are identified. From this understanding of the radiolytic decomposition of water, shield pressurization and corrosion are identified as the primary concerns. Existing experimental and modeling data addressing concerns are summarized. It was found that radiolysis of pure water in a closed volume results in minimal, if any net decomposition, and therefore reduces the potential for shield pressurization and corrosion.

  4. Addressing employee concerns about welding in a nuclear power plant

    SciTech Connect (OSTI)

    Danko, J.C.; Hansen, D.D.; O'Leary, P.D.

    1988-03-01T23:59:59.000Z

    A leading utility contracted with EG and G Idaho to perform a comprehensive, independent evaluation of the utility's welding program with respect to the safety-related welds made at one of its nuclear power plants. The purpose of this paper is to review a number of the employee concerns and the technical basis for the disposition of these concerns. In addition, recommendations are presented that may help to prevent the recurrence of employee concerns in future nuclear power plant construction, and thereby costly delays may be avoided and welding productivity and quality improved.

  5. 230 GHz VLBI observations of M87: event-horizon-scale structure at the enhanced very-high-energy $\\rm \\gamma$-ray state in 2012

    E-Print Network [OSTI]

    Akiyama, Kazunori; Fish, Vincent L; Doeleman, Sheperd S; Broderick, Avery E; Dexter, Jason; Hada, Kazuhiro; Kino, Motoki; Nagai, Hiroshi; Honma, Mareki; Johnson, Michael D; Algaba, Juan C; Asada, Keiichi; Brinkerink, Christiaan; Blundell, Ray; Bower, Geoffrey C; Cappallo, Roger; Crew, Geoffrey B; Dexter, Matt; Dzib, Sergio A; Freund, Robert; Friberg, Per; Gurwell, Mark; Ho, Paul T P; Inoue, Makoto; Krichbaum, Thomas P; Loinard, Laurent; MacMahon, David; Marrone, Daniel P; Moran, James M; Nakamura, Masanori; Nagar, Neil M; Ortiz-Leon, Gisela; Plambeck, Richard; Pradel, Nicolas; Primiani, Rurik A; Rogers, Alan E E; Roy, Alan L; SooHoo, Jason; Tavares, Jonathan-Leon; Tilanus, Remo P J; Titus, Michael; Wagner, Jan; Weintroub, Jonathan; Yamaguchi, Paul; Young, Ken H; Zensus, Anton; Ziurys, Lucy M

    2015-01-01T23:59:59.000Z

    We report on 230 GHz (1.3 mm) VLBI observations of M87 with the Event Horizon Telescope using antennas on Mauna Kea in Hawaii, Mt. Graham in Arizona and Cedar Flat in California. For the first time, we have acquired 230 GHz VLBI interferometric phase information on M87 through measurement of closure phase on the triangle of long baselines. Most of the measured closure phases are consistent with 0$^{\\circ}$ as expected by physically-motivated models for 230 GHz structure such as jet models and accretion disk models. The brightness temperature of the event-horizon-scale structure is $\\sim 1 \\times 10^{10}$ K derived from the compact flux density of $\\sim 1$ Jy and the angular size of $\\sim 40 $ $\\rm \\mu$as $\\sim$ 5.5 $R_{{\\rm s}}$, which is broadly consistent with the peak brightness of the radio cores at 1-86 GHz located within $\\sim 10^2$ $R_{{\\rm s}}$. Our observations occurred in the middle of an enhancement in very-high-energy (VHE) $\\rm \\gamma$-ray flux, presumably originating in the vicinity of the centr...

  6. Recommendations concerning energy information model documentation, public access, and evaluation

    E-Print Network [OSTI]

    Wood, David O.

    1979-01-01T23:59:59.000Z

    In this study we provide an analysis of the factors underlying Congressional concern regarding model documentation, policies for public access, and evaluation procedures of the Energy Information Administration (EIA) and ...

  7. Waste to Energy: Escalating Energy Concerns to Push Global Market...

    Open Energy Info (EERE)

    Energy Concerns to Push Global Market to Grow at 8.1% CAGR from 2013 to 2019 Oil Shale Market is Estimated to Reach USD 7,400.70 Million by 2022 more Group members (32)...

  8. Endangered, Threatened, and Species of Special Concern (Connecticut)

    Broader source: Energy.gov [DOE]

    This document lists endangered, threatened, and species of special concern in Connecticut, along with procedures for petitioning to add or remove a species from these lists and to add or remove an...

  9. Experiments concerning the dynamic filtration of drilling mud

    E-Print Network [OSTI]

    Eller, John Gary

    1989-01-01T23:59:59.000Z

    EXPERIMENTS CONCERNING THE DYNAMIC FILTRATION OF DRILLING MUD A Thesis by JOHN GARY ELLER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1989 Major Subject: Petroleum Engineering EXPERIMENTS CONCERNING THE DYNAMIC FILTRATION OF DRILLING MUD A Thesis by JOHN GARY ELLER Approved as to style and content by: Hans C. Ju am-Wold (Chair of Committee) tephen A. Holditch (Member) Ted...

  10. Study of Yang–Mills–Chern–Simons theory in presence of the Gribov horizon

    SciTech Connect (OSTI)

    Canfora, Fabrizio, E-mail: canfora@cecs.cl [Centro de Estudios Cientificos (CECs), Valdivia (Chile); Universidad Andres Bello, Av. Republica 440, Santiago (Chile); Gomez, Arturo, E-mail: arturo.gomez@proyectos.uai.cl [Departamento de Ciencias, Facultad de Artes Liberales y Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Viña del Mar. (Chile); Sorella, Silvio Paolo, E-mail: sorella@uerj.br [UERJ, Universidade do Estado do Rio de Janeiro (UERJ), Instituto de Física Teórica, Rua São Francisco Xavier 524, 20550-013, Maracaná, Rio de Janeiro (Brazil); Vercauteren, David, E-mail: vercauteren.uerj@gmail.com [UERJ, Universidade do Estado do Rio de Janeiro (UERJ), Instituto de Física Teórica, Rua São Francisco Xavier 524, 20550-013, Maracaná, Rio de Janeiro (Brazil)

    2014-06-15T23:59:59.000Z

    The two-point gauge correlation function in Yang–Mills–Chern–Simons theory in three dimensional Euclidean space is analysed by taking into account the non-perturbative effects of the Gribov horizon. In this way, we are able to describe the confinement and de-confinement regimes, which naturally depend on the topological mass and on the gauge coupling constant of the theory. -- Highlights: •We implement the Gribov quantization to the Topologically massive Yang–Mills theory. •We find a modified propagator at strong coupling by the Gribov horizon. •The gauge propagator depends on the topological mass and the coupling constant. •By studying the gauge propagator we describe the confined–deconfined regimes.

  11. Spherical collapse of a heat conducting fluid in higher dimensions without horizon

    E-Print Network [OSTI]

    A. banerjee; S. Chatterjee

    2004-06-08T23:59:59.000Z

    We consider a scenario where the interior spacetime,described by a heat conducting fluid sphere is matched to a Vaidya metric in higher dimensions.Interestingly we get a class of solutions, where following heat radiation the boundary surface collapses without the appearance of an event horizon at any stage and this happens with reasonable properties of matter field.The non-occurrence of a horizon is due to the fact that the rate of mass loss exactly counterbalanced by the fall of boundary radius.Evidently this poses a counter example to the so-called cosmic censorship hypothesis.Two explicit examples of this class of solutions are also given and it is observed that the rate of collapse is delayed with the introduction of extra dimensions.The work extends to higher dimensions our previous investigation in 4D.

  12. On the Smoothness of the Horizons of Multi-Black Hole Solutions

    E-Print Network [OSTI]

    Dean L. Welch

    1995-02-24T23:59:59.000Z

    In a recent paper it was suggested that some multi-black hole solutions in five or more dimensions have horizons that are not smooth. These black hole configurations are solutions to $d$-dimensional Einstein gravity (with no dilaton) and are extremally charged with a magnetic type $(d-2)$-form. In this work these solutions will be investigated further. It will be shown that although the curvature is bounded as the horizon of one of the black holes is approached, some derivatives of the curvature are not. This shows that the metric is not $C^{\\infty },$ but rather it is only $C^k$ with $k$ finite. These solutions are static so their lack of smoothness cannot be attributed to the presence of radiation.

  13. Vibration Testing of the Pluto/New Horizons Radioisotope Thermoelectric Generator

    SciTech Connect (OSTI)

    Charles D. Griffin

    2006-06-01T23:59:59.000Z

    The Radioisotopic Thermal Generator (RTG) for the Pluto/New Horizons spacecraft was subjected to a flight dynamic acceptance test to demonstrate that it would perform successfully following launch. Seven RTGs of this type had been assembled and tested at Mound, Ohio from 1984 to 1997. This paper chronicles major events in establishing a new vibration test laboratory at the Idaho National Laboratory and the nineteen days of dynamic testing.

  14. Horizon structure of rotating Einstein-Born-Infeld black holes and shadow

    E-Print Network [OSTI]

    Atamurotov, Farruh; Ahmedov, Bobomurat

    2015-01-01T23:59:59.000Z

    We investigate the horizon structure of the rotating Einstein-Born-Infeld solution which goes over to the Einstein-Maxwell's Kerr-Newman solution as the Born-Infeld parameter goes to infinity ($\\beta \\rightarrow \\infty$). We find that for a given $\\beta$, mass $M$ and charge $Q$, there exist critical spinning parameter $a_{E}$ and $r_{H}^{E}$, which corresponds to an extremal Einstein-Born-Infeld black hole with degenerate horizons, and $a_{E}$ decreases and $r_{H}^{E}$ increases with increase in the Born-Infeld parameter $\\beta$. While $aEinstein-Born-Infeld black hole with outer and inner horizons. Similarly, the effect of $\\beta$ on infinite redshift surface and in turn on ergoregion is also included. It is well known that a black hole can cast a shadow as an optical appearance due to its strong gravitational field. We also investigate the shadow cast by the non-rotating ($a=0$) Einstein-Born-Infeld black hole and demonstrate that the null geodesic equations can be integr...

  15. Hawking radiation and the boomerang behavior of massive modes near a horizon

    SciTech Connect (OSTI)

    Jannes, G. [Universite de Nice Sophia Antipolis, Laboratoire J.-A. Dieudonne, UMR CNRS-UNS 6621, Parc Valrose, 06108 Nice Cedex 02 (France); Low Temperature Laboratory, Aalto University School of Science, PO Box 15100, 00076 Aalto (Finland); Maiessa, P.; Rousseaux, G. [Universite de Nice Sophia Antipolis, Laboratoire J.-A. Dieudonne, UMR CNRS-UNS 6621, Parc Valrose, 06108 Nice Cedex 02 (France); Philbin, T. G. [School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, Scotland (United Kingdom)

    2011-05-15T23:59:59.000Z

    We discuss the behavior of massive modes near a horizon based on a study of the dispersion relation and wave packet simulations of the Klein-Gordon equation. We point out an apparent paradox between two (in principle equivalent) pictures of black-hole evaporation through Hawking radiation. In the picture in which the evaporation is due to the emission of positive-energy modes, one immediately obtains a threshold for the emission of massive particles. In the picture in which the evaporation is due to the absorption of negative-energy modes, such a threshold apparently does not exist. We resolve this paradox by tracing the evolution of the positive-energy massive modes with an energy below the threshold. These are seen to be emitted and move away from the black-hole horizon, but they bounce back at a 'red horizon' and are reabsorbed by the black hole, thus compensating exactly for the difference between the two pictures. For astrophysical black holes, the consequences are curious but do not affect the terrestrial constraints on observing Hawking radiation. For analogue-gravity systems with massive modes, however, the consequences are crucial and rather surprising.

  16. Coordinating Inventory Control and Pricing Strategies with Random Demand and Fixed Ordering Cost: the Infinite Horizon Case

    E-Print Network [OSTI]

    Chen, Xin

    We analyze an infinite horizon, single product, periodic review model in which pricing and production/inventory decisions are made simultaneously. Demands in different periods are identically distributed random variables ...

  17. Deepwater Horizon Oil Spill Principal Investigator (PI) Conference Sponsored by the NSTC SOST, hosted by the University of South Florida

    E-Print Network [OSTI]

    Meyers, Steven D.

    Deepwater Horizon Oil Spill Principal Investigator (PI) Conference Sponsored Ballroom · Oil/dispersant - extent and fate Tom Ryerson, National Oceanic and Atmospheric Administration · Oil/dispersant - impacts and mitigation in coastal

  18. Holographic Space-time and Black Holes: Mirages As Alternate Reality

    E-Print Network [OSTI]

    Tom Banks; Willy Fischler; Sandipan Kundu; Juan F. Pedraza

    2014-01-30T23:59:59.000Z

    We revisit our investigation of the claim of [1] that old black holes contain a firewall, i.e. an in-falling observer encounters highly excited states at a time much shorter than the light crossing time of the Schwarzschild radius. We used the formalism of Holographic Space-time (HST) where there is no dramatic change in particle physics inside the horizon until a time of order the Schwarzschild radius. We correct our description of the interior of the black hole . HST provides a complete description of the quantum mechanics along any time-like trajectory, even those which fall through the black hole horizon. The latter are described as alternative factorizations of the description of an external observer, turning the mirage of the interior provided by that observer's membrane paradigm on the stretched horizon, into reality.

  19. Non-commutative Einstein-Proca Space-time

    E-Print Network [OSTI]

    Blanca Gónzales; Román Linares; Marco Maceda; Oscar Sánchez-Santos

    2014-09-12T23:59:59.000Z

    In this work we present a deformed model of Einstein-Proca space-time based on the replacement of point-like sources by non-commutative smeared distributions. We discuss the solutions to the set of non-commutative Einstein-Proca equations thus obtained, with emphasis on the issue of singularities and horizons.

  20. 5/10/10 7:22 AMTerry Hazen, Berkeley Lab: Deepwater Horizon Spill Detergents Could Make Bad Situation Worse Page 1 of 3http://www.outlookseries.com/N7/Science/3910_Terry_Hazen_Berkeley_La...water_Horizon_Spill_Detergents_Could_Situation_Worse_Terry_Hazen.

    E-Print Network [OSTI]

    Hazen, Terry

    5/10/10 7:22 AMTerry Hazen, Berkeley Lab: Deepwater Horizon Spill Detergents Could Make Bad Situation Worse Page 1 of 3http://www.outlookseries.com/N7/Science/3910_Terry_Hazen_Berkeley_La...water_Horizon_Spill Terry Hazen, Berkeley Lab: Deepwater Horizon Spill Detergents Could Make Bad Situation Worse May 6, 2010

  1. espite concern about the state of the world

    E-Print Network [OSTI]

    Wu, Dapeng Oliver

    #12;office of research D espite concern about the state of the world economy, the contin- ued the envy of the world. Far from stagnating, the science and engineering occurring today at our universities's recovery from World War II, U.S. university research has been at the heart of the nation's economic

  2. Industrial hygiene concerns associated with oil shale development

    SciTech Connect (OSTI)

    Ettinger, H.J.

    1980-01-01T23:59:59.000Z

    Health protection concerns (including industrial hygiene, safety, and occupational medicine) must be evaluated to insure that development of the oil shale industry proceeds without significant risk to the health of the workers involved. These concerns need to be identified in the early stages of developing this industry. To provide a basis for discussing potential health protection concerns related to oil shale, it is necessary to briefly discuss the magnitude and characteristics of this resource; the alternate proposed technologies; and the unit operations which make up the operating system. This subject has been detailed in many publications, among them reports prepared for the Environmental Protection Agency. This discussion will be limited to providing sufficient background to put industrial hygiene and other health protection concerns in perspective, and will include a brief description of typical technologies under consideration. It will not provide a detailed description of these technologies, or attempt to cover all the alternate technologies which may be applied to the development of oil shale. However, a basis for considering potential health protection problems associated with development of this industry will be established.

  3. Ris Energy Report 2 Three growing concerns sustainability (particularly in

    E-Print Network [OSTI]

    1 Risø Energy Report 2 Three growing concerns ­ sustainability (particularly in the transport sector), security of energy supply and cli- mate change ­ have combined to increase interest in bioenergy and significant changes in energy markets. We even have a new term, "modern bioenergy", to cover those areas

  4. Identification of 300 Area Contaminants of Potential Concern for Soil

    SciTech Connect (OSTI)

    R.W. Ovink

    2010-04-05T23:59:59.000Z

    This report documents the process used to identify source area contaminants of potential concern (COPCs) in support of the 300 Area remedial investigation/feasibility study (RI/FS) work plan. This report also establishes the exclusion criteria applicable for 300 Area use and the analytical methods needed to analyze the COPCs.

  5. University of Aberdeen RECOMMENDATIONS CONCERNING STUDENTS WITH DYSLEXIA

    E-Print Network [OSTI]

    Levi, Ran

    University of Aberdeen RECOMMENDATIONS CONCERNING STUDENTS WITH DYSLEXIA Dyslexia and the Law students and staff. This includes students with dyslexia or other Specific Learning Difference (SpLD). Characteristics of Dyslexia Dyslexia Scotland and the Cross Party Group on Dyslexia at the Scottish Parliament

  6. Poor Nutrition and Health Concerns in Low Income Population

    E-Print Network [OSTI]

    and foodborne illness, reduced indigent health care costs and improved quality of life. Contact: Dean McPoor Nutrition and Health Concerns in Low Income Population An estimated one out of every six in 1995 as a cooperative endeavor among the Texas A&M AgriLife Extension Service, Texas Health and Human

  7. Navigating Computer Science Research Through Waves of Privacy Concerns

    E-Print Network [OSTI]

    Navigating Computer Science Research Through Waves of Privacy Concerns: Discussions among Computer as Institute for Software Research International Technical Report CMU-ISRI-03-102 School of Computer Science Carnegie Mellon University Pittsburgh, PA 15213-3890 Abstract Computer Science research and practice

  8. Navigating Computer Science Research Through Waves of Privacy Concerns

    E-Print Network [OSTI]

    1 Navigating Computer Science Research Through Waves of Privacy Concerns: Discussions among appears as Computer Science Technical Report CMU­CS­03­165 School of Computer Science Carnegie Mellon University Pittsburgh, PA 15213­3890 Abstract Computer Science research and practice are raising growing

  9. Navigating Computer Science Research Through Waves of Privacy Concerns

    E-Print Network [OSTI]

    Navigating Computer Science Research Through Waves of Privacy Concerns: Discussions among Computer as Computer Science Technical Report CMU-CS-03-165 School of Computer Science Carnegie Mellon University Pittsburgh, PA 15213-3890 Abstract Computer Science research and practice are raising growing privacy

  10. Architectural Concerns in Distributed and Mobile Collaborative Systems

    E-Print Network [OSTI]

    Dustdar, Schahram

    Architectural Concerns in Distributed and Mobile Collaborative Systems Schahram Dustdar Harald Gall Distributed Systems Group, Vienna University of Technology Argentinierstrasse 8/184-1 A-1040 Wien, Austria to integrate Workflow Management Systems (WfMS), Groupware Systems, and Busi- ness Process Modeling Systems

  11. Introduction Groundwater is a subject of rising social concern,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Introduction Groundwater is a subject of rising social concern, especially in coastal zones where most big cities are located. Due to growing demographic pressure in coastal areas, groundwater the overall challenge of changing groundwater poli- cy to address the emerging problems (Livingston & Gar

  12. Compressed air energy storage (CAES) environmental control concerns and program plan

    SciTech Connect (OSTI)

    Beckwith, M.A.; Boehm, D.W.

    1980-06-01T23:59:59.000Z

    This report assesses the required environmental research and recommends a program plan to assist DOD's Environmental Control Technology Division (ECT) in performing its mission of ensuring that the procedures, processes, systems, and strategies necessary to minimize any adverse environmental impacts of compressed air energy storage (CAES) are developed in a timely manner so as not to delay implementation of the technology. To do so, CAES technology and the expected major environmental concerns of the technology are described. Second, ongoing or planned research in related programs and the applicability of results from these programs to CAES environmental research are discussed. Third, the additional research and development required to provide the necessary environmental data base and resolve concerns in CAES are outlined. Finally, a program plan to carry out this research and development effort is presented.

  13. On quantum effects in the vicinity of would-be horizons

    E-Print Network [OSTI]

    P. Marecki

    2006-12-28T23:59:59.000Z

    We present a method based on the so-called Quantum Energy Inequalities, which allows to compare, and bound, the expectation values of energy-densities of ground states of quantum fields in spacetimes possessing isometric regions. The method supports the conclusion, that the Boulware energy density is universal both: at modest (and far) distances from compact spherical objects, and close to the would-be horizons of the gravastar/QBHO spacetimes. It also provides a natural consistency check for concrete (approximate, numerical) calculations of the expectation values of the energy-momentum tensors.

  14. Microsoft Word - Horizon Wind Energy Comments.docx | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently Asked Questions forCheneyNovember S.Fluor-B&W OE-781R DOE RFI on Smart GridHorizon

  15. Apparent horizon and gravitational thermodynamics of the Universe: The temperature confusion, first and second laws, and extensions to modified gravity

    E-Print Network [OSTI]

    Tian, David Wenjie

    2014-01-01T23:59:59.000Z

    The thermodynamics of the Universe is re-studied by requiring its compatibility with the holographic-style gravitational equations which govern the dynamics of both the cosmological apparent horizon and the entire Universe. We start from the Lambda Cold Dark Matter ($\\Lambda$CDM) cosmology of general relativity (GR) to establish a framework for the gravitational thermodynamics. The Clausius equation $T_AdS_A=-A_A \\psi_t$ for the isochoric process of an instantaneous apparent horizon indicates that, the Universe and its horizon entropies encode the Positive Out thermodynamic sign convention, which encourage us to adjust the traditional positive-heat-in Gibbs equation into the positive-heat-out version $dE_m=-T_mdS_m-P_mdV$. It turns out that the standard and the generalized second laws (GSLs) of nondecreasing entropies are always respected by the event-horizon system as long as the expanding Universe is dominated by nonexotic matter $-1\\leq w_m\\leq 1$, while for the apparent-horizon simple open system the two ...

  16. Assembly and Testing of a Radioisotope Power System for the New Horizons Spacecraft

    SciTech Connect (OSTI)

    Kenneth E. Rosenberg; Stephen G. Johnson

    2006-06-01T23:59:59.000Z

    The Idaho National Laboratory (INL) recently fueled and assembled a radioisotope power system (RPS) that was used upon the New Horizons spacecraft which was launched in January 2006. New Horizons is the first mission to the last planet - the initial reconnaissance of Pluto-Charon and the Kuiper Belt, exploring the mysterious worlds at the edge of our solar system. The RPS otherwise known as a "space battery" converts thermal heat into electrical energy. The thermal heat source contains plutonium dioxide in the form of ceramic pellets encapsulated in iridium metal. The space battery was assembled in a new facility at the Idaho National Laboratory site near Idaho Falls, Idaho. The new facility has all the fueling and testing capabilities including the following: the ability to handle all the shipping containers currently certified to ship Pu-238, the ability to fuel a variety of RPS designs, the ability to perform vibrational testing to simulate transportation and launch environments, welding systems, a center of mass determination device, and various other support systems.

  17. Stringy Stability of Charged Dilaton Black Holes with Flat Event Horizon

    E-Print Network [OSTI]

    Yen Chin Ong; Pisin Chen

    2014-12-29T23:59:59.000Z

    Electrically charged black holes with flat event horizon in anti-de Sitter space have received much attention due to various applications in Anti-de Sitter/Conformal Field Theory (AdS/CFT) correspondence, from modeling the behavior of quark-gluon plasma to superconductor. Crucial to the physics on the dual field theory is the fact that when embedded in string theory, black holes in the bulk may become vulnerable to instability caused by brane pair-production. Since dilaton arises naturally in the context of string theory, we study the effect of coupling dilaton to Maxwell field on the stability of flat charged AdS black holes. In particular, we study the stability of Gao-Zhang black holes, which are locally asymptotically anti-de Sitter. We find that for dilaton coupling parameter $\\alpha$ > 1, flat black holes are stable against brane pair production, however for 0 electrical charges is increased. Such instability however, behaves somewhat differently from that of flat Reissner-Nordstr\\"om black holes. In addition, we prove that the Seiberg-Witten action of charged dilaton AdS black hole of Gao-Zhang type with flat event horizon (at least in 5-dimension) is always logarithmically divergent at infinity for finite values of $\\alpha$, and is finite and positive in the case $\\alpha$ tends to infinity . We also comment on the robustness of our result for other charged dilaton black holes that are not of Gao-Zhang type.

  18. Scheduling in an Energy Cost Aware Environment The energy cost aware scheduling problem (ECASP) is concerned with variable electricity tariffs, where the price of

    E-Print Network [OSTI]

    Scheduling in an Energy Cost Aware Environment The energy cost aware scheduling problem (ECASP) is concerned with variable electricity tariffs, where the price of electricity changes over time depending because a schedule without considering variable energy charges might significantly increase

  19. Abstract--This paper proposes a multi-hour thermal load dispatch model (24-hour time horizon) controlling NOx emission

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    pioneered the Clean Air Act (CAA) in 1963 which established a criteria pollutants list considered dangerous and the Netherlands are among the most advanced countries in relation to environmental pollution control. USA in 1970 to set the uniform national standards for air quality, to create the Environmental Protection

  20. Real-Time Adaptive Management of Soil Salinity Using a Receding Horizon Control Algorithm: A Pilot-Scale Demonstration

    E-Print Network [OSTI]

    Park, Yeonjeong; Harmon, Thomas C

    2009-01-01T23:59:59.000Z

    water content, residual water content, an empirical moistureand rinsed with deionized water to remove residual salts.residual salt concentrations were found to be negligible compared to the salt loading in the irrigation water,

  1. Other utilities, not IPPs key concern for electric executives

    SciTech Connect (OSTI)

    O'Driscoll, M.

    1994-01-12T23:59:59.000Z

    The evolving competitive electric utility world is making executives more cautious and focused on their core businesses at the expense of high-profile issues like international investment, global warming, demand side management and electric and magnetic fields, a new survey shows. The 1994 Electric Utility Outlook, conducted by the Washington International Energy Group, also shows growing concern about utility-on-utility competition and a decline of the independent power producer threat, a growing but grudging acknowledgement of retail wheeling and increasing discomfort with nuclear power.

  2. Department of Energy Idaho - Common Concerns About the INL

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGas SeparationsRelevantDOEDelegations Current ByCommon Concerns

  3. Environment/Health/Safety (EHS): Safety Concerns Form

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8, 2000ConsumptionInnovationEnvironment, SafetySafety CommitteeConcerns

  4. Upper bound for entropy in asymptotically de Sitter space-time

    E-Print Network [OSTI]

    Kengo Maeda; Tatsuhiko Koike; Makoto Narita; Akihiro Ishibashi

    1997-12-05T23:59:59.000Z

    We investigate nature of asymptotically de Sitter space-times containing a black hole. We show that if the matter fields satisfy the dominant energy condition and the cosmic censorship holds in the considering space-time, the area of the cosmological event horizon for an observer approaching a future timelike infinity does not decrease, i.e. the second law is satisfied. We also show under the same conditions that the total area of the black hole and the cosmological event horizon, a quarter of which is the total Bekenstein-Hawking entropy, is less than $12\\pi/\\Lambda$, where $\\Lambda$ is a cosmological constant. Physical implications are also discussed.

  5. Overview of the environmental concerns of coal transportation

    SciTech Connect (OSTI)

    Bertram, K.; Dauzvardis, P.; Fradkin, L.; Surles, T.

    1980-02-01T23:59:59.000Z

    More than 30 environmental concerns were analyzed for the transportation of coal by rail, roads (trucks), high voltage transmission lines (that is, from mine-mouth generating plants to distribution networks), coal slurry pipelines, and barges. The following criteria were used to identify these problems: (1) real physical environmetal impacts for which control technologies must be developed, or regulation made effective where control technologies presently exist; (2) the level of impact is uncertain, although the potential impact may be moderate to high; (3) the concerns identified by the first two criteria are specific to or exacerbated by coal transportation. Generic transportation problems are not included. The significant environmental problems identified as a result of this study are: (1) rail transport - community traffic disruption and human health, safety, and habitat destruction; (2) coal haul roads - road degradation, traffic congestion and safety, air quality, and noise; (3) high voltage transmission lines - changed land use without local benefits, biological health and safety effects, and disruption of world weather patterns; (4) slurry pipelines - water availability, water quality, and possible spills from non-water slurry pipelines; and (5) barge transport - impacts common to all barge traffic. (DMC)

  6. Legal and social concerns to the development of bioremediation technologies

    SciTech Connect (OSTI)

    Bilyard, G.R.; McCabe, G.H.; White, K.A.; Gajewski, S.W.; Hendrickson, P.L.; Jaksch, J.A.; Kirwan-Taylor, H.A.; McKinney, M.D.

    1996-09-01T23:59:59.000Z

    The social and legal framework within which bioremediation technologies must be researched, developed, and deployed in the US are discussed in this report. Discussions focus on policies, laws and regulations, intellectual property, technology transfer, and stakeholder concerns. These discussions are intended to help program managers, scientists and engineers understand the social and legal framework within which they work, and be cognizant of relevant issues that must be navigated during bioremediation technology research, development, and deployment activities. While this report focuses on the legal and social environment within which the DOE operates, the laws, regulations and social processes could apply to DoD and other sites nationwide. This report identifies specific issues related to bioremediation technologies, including those involving the use of plants; native, naturally occurring microbes; non-native, naturally occurring microbes; genetically engineered organisms; and microbial products (e.g., enzymes, surfactants, chelating compounds). It considers issues that fall within the following general categories: US biotechnology policy and the regulation of field releases of organisms; US environmental laws and waste cleanup regulations; intellectual property and patenting issues; technology transfer procedures for commercializing technology developed through government-funded research; stakeholder concerns about bioremediation proposals; and methods for assuring public involvement in technology development and deployment.

  7. Microbial gene functions enriched in the Deepwater Horizon deep-sea oil plume

    SciTech Connect (OSTI)

    Lu, Z.; Deng, Y.; Nostrand, J.D. Van; He, Z.; Voordeckers, J.; Zhou, A.; Lee, Y.-J.; Mason, O.U.; Dubinsky, E.; Chavarria, K.; Tom, L.; Fortney, J.; Lamendella, R.; Jansson, J.K.; D?haeseleer, P.; Hazen, T.C.; Zhou, J.

    2011-06-15T23:59:59.000Z

    The Deepwater Horizon oil spill in the Gulf of Mexico is the deepest and largest offshore spill in U.S. history and its impacts on marine ecosystems are largely unknown. Here, we showed that the microbial community functional composition and structure were dramatically altered in a deep-sea oil plume resulting from the spill. A variety of metabolic genes involved in both aerobic and anaerobic hydrocarbon degradation were highly enriched in the plume compared to outside the plume, indicating a great potential for intrinsic bioremediation or natural attenuation in the deep-sea. Various other microbial functional genes relevant to carbon, nitrogen, phosphorus, sulfur and iron cycling, metal resistance, and bacteriophage replication were also enriched in the plume. Together, these results suggest that the indigenous marine microbial communities could play a significant role in biodegradation of oil spills in deep-sea environments.

  8. Lyapunov exponents and anomalous diffusion of a Lorentz gas with infinite horizon using approximate zeta functions

    SciTech Connect (OSTI)

    Dahlqvist, P. [Royal Inst. of Technology, Stockholm (Sweden)

    1996-08-01T23:59:59.000Z

    We compute the Lyapunov exponent, the generalized Lyapunov exponents, and the diffusion constant for a Lorentz gas on a square lattice, thus having infinite horizon. Approximate zeta functions, written in terms of probabilities rather than periodic orbits, are used in order to avoid the convergence problems of cycle expansions. The emphasis is on the relaxation between the analytic structure of the zeta function, where a branch cut plays an important role, and the asymptotic dynamics of the system. The Lyapunov exponent for the corresponding map agrees with the conjectured limit {lambda}{sub map}=-2 log(R) + C + O(R) and we derive an approximate value for the constant C in good agreement with numerical simulations. We also find a diverging diffusion constant D(t){approx}log t and a phase transition for the generalized Lyapunov exponents.

  9. Status Report and Proposal Concerning the Supply of Depleted Uranium Metal Bands for a Particle Detector

    E-Print Network [OSTI]

    1980-01-01T23:59:59.000Z

    Status Report and Proposal Concerning the Supply of Depleted Uranium Metal Bands for a Particle Detector

  10. Draft Horizon 2020 Work Programme 2014-2015 in the area of Food security, sustainable agriculture and forestry,

    E-Print Network [OSTI]

    Greifswald, Ernst-Moritz-Arndt-Universität

    agriculture and forestry, marine and maritime and inland water research and the bioeconomy Important notice of this document. #12;HORIZON 2020 ­ WORK PROGRAMME 2014-2015 Food security, sustainable agriculture and forestry ..................... 14 SFS-7-2014/2015: Genetic resources and agricultural diversity for food security, productivity

  11. Renormalized Vacuum Polarization and Stress Tensor on the Horizon of a Schwarzschild Black Hole Threaded by a Cosmic String

    E-Print Network [OSTI]

    Adrian C. Ottewill; Peter Taylor

    2010-10-19T23:59:59.000Z

    We calculate the renormalized vacuum polarization and stress tensor for a massless, arbitrarily coupled scalar field in the Hartle-Hawking vacuum state on the horizon of a Schwarzschild black hole threaded by an infinte straight cosmic string. This calculation relies on a generalized Heine identity for non-integer Legendre functions which we derive without using specific properties of the Legendre functions themselves.

  12. Adaptive Receding Horizon Control of Tubular Bioreactors J.M. Igreja, J. M. Lemos and R. N. Silva

    E-Print Network [OSTI]

    Sontag, Eduardo

    Adaptive Receding Horizon Control of Tubular Bioreactors J.M. Igreja, J. M. Lemos and R. N. Silva algorithm to tubular bioreactors. According to the control strategy proposed, the system of PDEs describing bioreactors. The approach followed consists in approximating the hyperbolic PDE describing the plant

  13. A knowledge-based approach of seismic interpretation : horizon and dip-fault detection by means of cognitive vision.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A knowledge-based approach of seismic interpretation : horizon and dip-fault detection by means presents preliminary results obtained through a new seismic interpretation methodology based on cognitive building process. The efforts currently made to improve seismic interpretation are mainly focused

  14. Load Reduction of Wind Turbines Using Receding Horizon Control Mohsen Soltani, Rafael Wisniewski, Per Brath, and Stephen Boyd

    E-Print Network [OSTI]

    Load Reduction of Wind Turbines Using Receding Horizon Control Mohsen Soltani, Rafael Wisniewski, Per Brath, and Stephen Boyd Abstract-- Large scale wind turbines are lightly damped mechanical% respectively, when compared to a conventional controller. I. INTRODUCTION The size of wind turbine structures

  15. From the sea: Chemical and biological concerns. Final report

    SciTech Connect (OSTI)

    Murphy, J.M.

    1994-02-08T23:59:59.000Z

    With the collapse of the Soviet Union the U.S. Navy devised a new strategy, ... FROM THE SEA. This strategy is designed to prepare the Navy for regional challenges. Proliferation of weapons of mass destruction is a major concern of U.S. national defense. This paper uses some historical examples and technological data to postulate conceivable effects from chemical and biological weapons on FROM THE SEA. The focus of this paper is on the operational level of war. The paper addresses what the Navy and the Unified Commander in Chiefs should do to prepare for operations in a contaminated environment. Chemical warfare, Chemical defense, From the sea, Joint Operations, Joint Maritime Operations, Chemical weapons, Biological weapons.

  16. Asymptotic behavior of the finite-time expected time-integrated negative part of some risk processes and optimal reserve allocation

    E-Print Network [OSTI]

    Boyer, Edmond

    heavy-tailed and light-tailed claim amount distributions are investigated. The time horizon may theory, heavy-tailed and light-tailed claim size distribution, risk measure, optimal reserve allocation. 1. Introduction The current change of regulation leads the insurance industry to address new

  17. Apparent horizon and gravitational thermodynamics of the Universe: Solutions to the temperature and entropy confusions, and extensions to modified gravity

    E-Print Network [OSTI]

    David Wenjie Tian; Ivan Booth

    2015-01-22T23:59:59.000Z

    Thermodynamics of the Universe is restudied by requiring its compatibility with the holographic-style gravitational equations which govern the dynamics of both the cosmological apparent horizon and the entire Universe. We start from the Lambda Cold Dark Matter ($\\Lambda$CDM) cosmology of general relativity (GR) to establish a framework for the gravitational thermodynamics. The Cai-Kim Clausius equation $T_{\\text{A}}dS_{\\text{A}}=-dE_{\\text{A}}=-A_{\\text{A}} \\psi_t$ for the isochoric process of an instantaneous apparent horizon indicates that, the Universe and its horizon entropies encode the Positive Out thermodynamic sign convention, which encourage us to adjust the traditional positive-heat-in Gibbs equation into the positive-heat-out version $dE_m=-T_mdS_m-P_mdV$. It turns out that the standard and the generalized second laws (GSLs) of nondecreasing entropies are always respected by the event-horizon system as long as the expanding Universe is dominated by nonexotic matter $-1\\leq w_m\\leq 1$, while for the apparent-horizon simple open system the two second laws hold if $-1\\leq w_martificial local equilibrium assumption is abandoned in the GSL. All constraints regarding entropy evolution are expressed by the equation of state parameters, which show that from a thermodynamic perspective the phantom dark energy is less favored than the cosmological constant and the quintessence. Finally, the whole framework is extended from GR and $\\Lambda$CDM to modified gravities with field equations $R_{\\mu\

  18. Further Findings Concerning Electrical Energy Monitoring in an Industrial Plant 

    E-Print Network [OSTI]

    Lewis, D. R.; Dorhofer, F. J.; Heffington, W. M.

    1995-01-01T23:59:59.000Z

    The Energy Systems Laboratory (ESL) at Texas A&M University has monitored the real-time electrical energy consumption, demand, and power factor of a large metal fabrication plant in Houston, Texas for twelve months. Monthly reports that present...

  19. Further Findings Concerning Electrical Energy Monitoring in an Industrial Plant

    E-Print Network [OSTI]

    Lewis, D. R.; Dorhofer, F. J.; Heffington, W. M.

    The Energy Systems Laboratory (ESL) at Texas A&M University has monitored the real-time electrical energy consumption, demand, and power factor of a large metal fabrication plant in Houston, Texas for twelve months. Monthly reports that present...

  20. On the Quantum Stability of the Time Machine

    E-Print Network [OSTI]

    S. V. Krasnikov

    1995-08-16T23:59:59.000Z

    In a number of papers it has been claimed that the time machine are quantum unstable, which manifests itself in the divergence of the vacuum expectation value of the stress-energy tensor $\\langle{\\bf T}\\rangle$ near the Cauchy horizon. The expression for $\\langle{\\bf T}\\rangle$ was found in these papers on the basis of some specific approach \\cite{Fro,KimT}.\\par We show that this approach is untenable in that the above expression firstly is not derived from some more fundamental and undeniable premises, as it is claimed, but rather postulated and secondly contains undefined terms, so that one can neither use nor check it. As a counterexample we cite a few cases of (two-dimensional) spacetimes containing time machines with $\\langle{\\bf T}\\rangle$ bounded near the Cauchy horizon.

  1. Identification of contaminants of concern Columbia River Comprehensive Impact Assessment

    SciTech Connect (OSTI)

    Napier, B.A.; Batishko, N.C.; Heise-Craff, D.A.; Jarvis, M.F.; Snyder, S.F.

    1995-01-01T23:59:59.000Z

    The Columbia River Comprehensive Impact Assessment (CRCIA) Project at the Pacific Northwest Laboratory (PNL) is evaluating the current human and ecological risks from contaminants in the Columbia River. The risks to be studied are those attributable to past and present activities on the Hanford Site. The Hanford Site is located in southcentral Washington State near the town of Richland. Human risk from exposure to radioactive and hazardous materials will be addressed for a range of river use options. Ecological risk will be evaluated relative to the health of the current river ecosystem. The overall purpose of the project is to determine if enough contamination exists in the Columbia River to warrant cleanup actions under applicable environmental regulations. This report documents an initial review, from a risk perspective, of the wealth of historical data concerning current or potential contamination in the Columbia River. Sampling data were examined for over 600 contaminants. A screening analysis was performed to identify those substances present in such quantities that they may pose a significant human or ecological risk. These substances will require a more detailed analysis to assess their impact on humans or the river ecosystem.

  2. Base closure: Environmental concerns for transfer of a ``GOCO`` facility

    SciTech Connect (OSTI)

    Henderson, M.R.; Dent, M.J.; McLaurin, E.S.

    1994-12-31T23:59:59.000Z

    Faced with funding restrictions, cutbacks and fiscal restraints, the United States Department of Defense (DOD), over the next few years will be required to downsize its military personnel and equipment and divest or transfer some of its facilities. A program of procedures used to assess the environmental conditions of a government facility for transfer to non-federal ownership is required. An environmental site assessment or an Environmental Baseline Survey (EBS) is a program that can be used to evaluate the environmental conditions at a facility and whether it is in compliance with existing environmental regulations. An EBS will be required at both the large military bases and the smaller Government Owned Contractor Operated (GOCO) facilities. This presentation focuses on a case study of an EBS conducted at a GOCO facility in the upper midwest. The unique challenge offered at this site, as opposed to other military bases, is that the property consisted primarily of manufacturing areas. The use of hazardous substances and petroleum products by several defense contractors over the years resulted in environmental concerns that may have affected soil and ground water. Since this site is one of the first divestitures of a GOCO facility, the data collection process, environmental findings, recommendations and unique problems associated with a GOCO facility can serve as a model for future GOCO divestitures.

  3. Criticality safety concerns of uranium deposits in cascade equipment

    SciTech Connect (OSTI)

    Plaster, M.J. [Lockheed Martin Utility Services, Inc., Piketon, OH (United States)

    1996-12-31T23:59:59.000Z

    The Paducah and Portsmouth Gaseous Diffusion Plants enrich uranium in the {sup 235}U isotope by diffusing gaseous uranium hexafluoride (UF{sub 6}) through a porous barrier. The UF{sub 6} gaseous diffusion cascade utilized several thousand {open_quotes}stages{close_quotes} of barrier to produce highly enriched uranium (HEU). Historically, Portsmouth has enriched the Paducah Gaseous Diffusion Plant`s product (typically 1.8 wt% {sup 235}U) as well as natural enrichment feed stock up to 97 wt%. Due to the chemical reactivity of UF{sub 6}, particularly with water, the formation of solid uranium deposits occur at a gaseous diffusion plant. Much of the equipment operates below atmospheric pressure, and deposits are formed when atmospheric air enters the cascade. Deposits may also be formed from UF{sub 6} reactions with oil, UF{sub 6} reactions with the metallic surfaces of equipment, and desublimation of UF{sub 6}. The major deposits form as a result of moist air in leakage due to failure of compressor casing flanges, blow-off plates, seals, expansion joint convolutions, and instrument lines. This report describes criticality concerns and deposit disposition.

  4. Scientists detect methane levels three times larger than expected...

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

    methane that actually preceded recent concerns about potential emissions from fracking," Dubey said. Scientists detect methane levels three times larger than expected over...

  5. Time lapse seismic signal analysis for Cranfield, MS, EOR and CCS site Ditkof, J.1

    E-Print Network [OSTI]

    Texas at Austin, University of

    -delay along a horizon below the reservoir. Keywords: time lapse, 4D seismic, CO2 sequestration, EOR, seismic under continuous CO2 injection by Denbury Onshore LLC since 2008. To date, more than 3 million tons of CO2 remain in the subsurface. In 2007 and 2010, 3D seismic surveys were shot and an initial 4D

  6. Shortfall risk minimization in discrete time financial market models Noufel Frikha

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . In a Markovian framework, we propose and analyze several algorithms based on Monte Carlo simulations to estimate by using a self-financing strategy on finite horizon time. The unique cost of replication is the expected which requires a large amount of initial capital. However, this approach is known to take into account

  7. Guidelines and Information Concerning Sensitive and Restricted Data

    E-Print Network [OSTI]

    Kelly Beranger

    2013-03-08T23:59:59.000Z

    Jan 5, 2012 ... Enter grade related data only while being logged on banach or hardy. ... (the first time) read the terms to use FileLocker and, if you agree, ... a new small pop-up window will open; towards the right is a message "search for ...

  8. DETECTION OF THE COSMIC {gamma}-RAY HORIZON FROM MULTIWAVELENGTH OBSERVATIONS OF BLAZARS

    SciTech Connect (OSTI)

    Dominguez, A.; Siana, B. [Department of Physics and Astronomy, University of California, Riverside, CA 92521 (United States); Finke, J. D. [U.S. Naval Research Laboratory, Space Science Division, Code 7653, 4555 Overlook Avenue SW, Washington, DC 20375 (United States); Prada, F. [Campus of International Excellence UAM-CSIC, Cantoblanco, E-28049 Madrid (Spain); Primack, J. R. [Department of Physics, University of California, Santa Cruz, CA 95064 (United States); Kitaura, F. S. [Leibniz-Institut fuer Astrophysik (AIP), An der Sternwarte 16, D-14482 Potsdam (Germany); Paneque, D., E-mail: albertod@ucr.edu [Kavli Institute for Particle Astrophysics and Cosmology, SLAC, Stanford University, Stanford, CA 94305 (United States)

    2013-06-10T23:59:59.000Z

    The first statistically significant detection of the cosmic {gamma}-ray horizon (CGRH) that is independent of any extragalactic background light (EBL) model is presented. The CGRH is a fundamental quantity in cosmology. It gives an estimate of the opacity of the universe to very high energy (VHE) {gamma}-ray photons due to photon-photon pair production with the EBL. The only estimations of the CGRH to date are predictions from EBL models and lower limits from {gamma}-ray observations of cosmological blazars and {gamma}-ray bursts. Here, we present homogeneous synchrotron/synchrotron self-Compton (SSC) models of the spectral energy distributions of 15 blazars based on (almost) simultaneous observations from radio up to the highest energy {gamma}-rays taken with the Fermi satellite. These synchrotron/SSC models predict the unattenuated VHE fluxes, which are compared with the observations by imaging atmospheric Cherenkov telescopes. This comparison provides an estimate of the optical depth of the EBL, which allows us a derivation of the CGRH through a maximum likelihood analysis that is EBL-model independent. We find that the observed CGRH is compatible with the current knowledge of the EBL.

  9. Detection of the Cosmic ?-Ray Horizon From Multiwavelength Observations of Blazars

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

    Dominguez, A.; Finke, J. D.; Prada, F.; Primack, J. R.; Kitaura, F. S.; Siana, B.; Paneque, D.

    2013-05-24T23:59:59.000Z

    The first statistically significant detection of the cosmic ?-ray horizon (CGRH) that is independent of any extragalactic background light (EBL) model is presented. The CGRH is a fundamental quantity in cosmology. It gives an estimate of the opacity of the Universe to very high energy (VHE) ?-ray photons due to photon-photon pair production with the EBL. The only estimations of the CGRH to date are predictions from EBL models and lower limits from ?-ray observations of cosmological blazars and ?-ray bursts. Here, we present homogeneous synchrotron/synchrotron self-Compton (SSC) models of the spectral energy distributions of 15 blazars based on (almost) simultaneous observations from radio up to the highest energy ?-rays taken with the Fermi satellite. These synchrotron/SSC models predict the unattenuated VHE fluxes, which are compared with the observations by imaging atmospheric Cherenkov telescopes. This comparison provides an estimate of the optical depth of the EBL, which allows a derivation of the CGRH through a maximum likelihood analysis that is EBL-model independent. We find that the observed CGRH is compatible with the current knowledge of the EBL.

  10. X-RAY TRANSIENTS IN THE ADVANCED LIGO/VIRGO HORIZON

    SciTech Connect (OSTI)

    Kanner, Jonah [LIGO-California Institute of Technology, Pasadena, CA 91125 (United States); Baker, John; Blackburn, Lindy; Camp, Jordan [NASA Goddard Space Flight Center, Mail Code 663, Greenbelt, MD 20771 (United States); Mooley, Kunal [California Institute of Technology, Astronomy Department, Mail Code 249-17, Pasadena, CA 91125 (United States); Mushotzky, Richard; Ptak, Andy, E-mail: jonah.kanner@ligo.org [NASA Goddard Space Flight Center, Mail Code 661, Greenbelt, MD 20771 (United States)

    2013-09-01T23:59:59.000Z

    Advanced LIGO and Advanced Virgo will be all-sky monitors for merging compact objects within a few hundred megaparsecs. Finding the electromagnetic counterparts to these events will require an understanding of the transient sky at low redshift (z < 0.1). We performed a systematic search for extragalactic, low redshift, transient events in the XMM-Newton Slew Survey. In a flux limited sample, we found that highly variable objects comprised 10% of the sample, and that of these, 10% were spatially coincident with cataloged optical galaxies. This led to 4 Multiplication-Sign 10{sup -4} transients per square degree above a flux threshold of 3 Multiplication-Sign 10{sup -12} erg cm{sup -2} s{sup -1} (0.2-2 keV) which might be confused with LIGO/Virgo counterparts. This represents the first extragalactic measurement of the soft X-ray transient rate within the Advanced LIGO/Virgo horizon. Our search revealed six objects that were spatially coincident with previously cataloged galaxies, lacked evidence for optical active galactic nuclei, displayed high luminosities {approx}10{sup 43} erg s{sup -1}, and varied in flux by more than a factor of 10 when compared with the ROSAT All-Sky Survey. At least four of these displayed properties consistent with previously observed tidal disruption events.

  11. Clustering of quintessence on horizon scales and its imprint on HI intensity mapping

    SciTech Connect (OSTI)

    Duniya, Didam G.A.; Bertacca, Daniele; Maartens, Roy, E-mail: adamsgwazah@gmail.com, E-mail: daniele.bertacca@gmail.com, E-mail: roy.maartens@gmail.com [Physics Department, University of the Western Cape, Cape Town 7535 (South Africa)

    2013-10-01T23:59:59.000Z

    Quintessence can cluster only on horizon scales. What is the effect on the observed matter distribution? To answer this, we need a relativistic approach that goes beyond the standard Newtonian calculation and deals properly with large scales. Such an approach has recently been developed for the case when dark energy is vacuum energy, which does not cluster at all. We extend this relativistic analysis to deal with dynamical dark energy. Using three quintessence potentials as examples, we compute the angular power spectrum for the case of an HI intensity map survey. Compared to the concordance model with the same small-scale power at z = 0, quintessence boosts the angular power by up to ? 15% at high redshifts, while power in the two models converges at low redshifts. The difference is mainly due to the background evolution, driven mostly by the normalization of the power spectrum today. The dark energy perturbations make only a small contribution on the largest scales, and a negligible contribution on smaller scales. Ironically, the dark energy perturbations remove the false boost of large-scale power that arises if we impose the (unphysical) assumption that the dark energy is smooth.

  12. Generalized second law of thermodynamics on the apparent horizon in modified Gauss-Bonnet gravity

    E-Print Network [OSTI]

    Abdolmaleki, A

    2015-01-01T23:59:59.000Z

    Modified gravity and generalized second law (GSL) of thermodynamics are interesting topics in the modern cosmology. In this regard, we investigate the GSL of gravitational thermodynamics in the framework of modified Gauss-Bonnet gravity or f(G)-gravity. We consider a spatially FRW universe filled with the matter and radiation enclosed by the dynamical apparent horizon with the Hawking temperature. For two viable f(G) models, we first numerically solve the set of differential equations governing the dynamics of f(G)-gravity. Then, we obtain the evolutions of the Hubble parameter, the Gauss-Bonnet curvature invariant term, the density and equation of state parameters as well as the deceleration parameter. In addition, we check the energy conditions for both models and finally examine the validity of the GSL. For the selected f(G) models, we conclude that both models have a stable de Sitter attractor. The equation of state parameters behave quite similar to those of the LCDM model in the radiation/matter dominat...

  13. Energy Conclave 2010 The global energy concerns of depleting fossil fuels and climate change have put

    E-Print Network [OSTI]

    Srivastava, Kumar Vaibhav

    at the rapidly increasing energy demand, the limited supply of fossil fuels and the increased concern over globalEnergy Conclave 2010 8th - 15th The global energy concerns of depleting fossil fuels and climate

  14. Question of the Week: What are Your Greatest Energy Concerns as We Approach Winter?

    Broader source: Energy.gov [DOE]

    We asked, you answered: What are your greatest energy concerns as we approach the winter heating season?

  15. A problem of hypothetical emerging of cosmic background radiation photons on horizon in the standard model of universe

    E-Print Network [OSTI]

    V. Skalsky

    2000-09-25T23:59:59.000Z

    The present temperature of cosmic background radiation and the present number density of photons of cosmic background radiation in the observed expansive and isotropic relativistic Universe is in the standard model of universe explained by the assumption of emergence of the photons of cosmic background radiation on the horizon (of the most remote visibility). However, the physical analysis shows unambiguously that this assumption contradicts the special theory of relativity and the quantum mechanics.

  16. Flexural unfolding of horizons using paleomagnetic vectors M.J. Ramn a,b,*, Emilio L. Pueyo a

    E-Print Network [OSTI]

    Zaragoza, Universidad de

    Flexural unfolding of horizons using paleomagnetic vectors M.J. Ramón a,b,*, Emilio L. Pueyo a , José Luis Briz c,d , Andrés Pocoví b , José Carlos Ciria c a Instituto Geológico y Minero de España (IGME), Unidad de Zaragoza, Zaragoza, Spain b Departamento de Ciencias de la Tierra, University

  17. Monitoring and Reporting Services for the Toronto Library, Final Report, TESCOR Energy Services, through Energy Systems Associates and New Horizons Technology

    E-Print Network [OSTI]

    Haberl, J. S.; Athar, A.; Claridge, D. E.

    1998-01-01T23:59:59.000Z

    This report summarizes the work performed for TESCOR Energy Services through Energy Systems Associates and New Horizons Technology. This work includes the monitoring and analysis of data from the data logger that was installed in the Toronto Library...

  18. Deep-Diving Cetaceans of the Gulf of Mexico : : Acoustic Ecology and Response to Natural and Anthropogenic Forces Including the Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    Merkens, Karlina Paul

    2013-01-01T23:59:59.000Z

    2.4.1 Seasonal and Oil-spill related trends . . 2.4.2 Diel1.4 The Deepwater Horizon Oil Spill . . . . 1.5 DataOil Figure Figure Figure Figure Figure Figure Figure Figure

  19. Stress-energy tensor in colliding plane wave space-times: An approximation procedure

    E-Print Network [OSTI]

    Miquel Dorca

    1997-11-07T23:59:59.000Z

    In a recent work on the quantization of a massless scalar field in a particular colliding plane wave space-time, we computed the vacuum expectation value of the stress-energy tensor on the physical state which corresponds to the Minkowski vacuum before the collision of the waves. We did such a calculation in a region close to both the Killing-Cauchy horizon and the folding singularities that such a space-time contains. In the present paper, we give a suitable approximation procedure to compute this expectation value, in the conformal coupling case, throughout the causal past of the center of the collision. This will allow us to approximately study the evolution of such an expectation value from the beginning of the collision until the formation of the Killing-Cauchy horizon. We start with a null expectation value before the arrival of the waves, which then acquires nonzero values at the beginning of the collision and grows unbounded towards the Killing-Cauchy horizon. The value near the horizon is compatible with our previous result, which means that such an approximation may be applied to other colliding plane wave space-times. Even with this approximation, the initial modes propagated into the interaction region contain a function which cannot be calculated exactly and to ensure the correct regularization of the stress-energy tensor with the point-splitting technique, this function must be given up to adiabatic order four of approximation.

  20. Studies and research concerning BNFP: cask handling equipment standardization

    SciTech Connect (OSTI)

    McCreery, Paul N.

    1980-10-01T23:59:59.000Z

    This report covers the activities of one of the sub-tasks within the Spent LWR Fuel Transportation Receiving, Handling, and Storage program. The sub-task is identified as Cask Handling Equipment Standardization. The objective of the sub-task specifies: investigate and identify opportunities for standardization of cask interface equipment. This study will examine the potential benefits of standardized yokes, decontamination barriers and special tools, and, to the extent feasible, standardized methods and software for handling the variety of casks presently available in the US fleet. The result of the investigations is a compilation of reports that are related by their common goal of reducing cask turnaround time.

  1. Summary of Tiger Team Assessment and Technical Safety Appraisal recurring concerns in the Maintenance Area

    SciTech Connect (OSTI)

    Not Available

    1993-01-01T23:59:59.000Z

    Tiger Team Assessments and Technical Safety Appraisals (TSA) were reviewed and evaluated for concerns in the Maintenance Area (MA). Two hundred and thirty one (231) maintenance concerns were identified by the Tiger Team Assessments and TSA reports. These recurring concerns appear below. A summary of the Noteworthy Practices that were identified and a compilation of the maintenance concerns for each performance objective that were not considered as recurring are also included. Where the Tiger Team Assessment and TSA identified the operating contractor or facility by name, the concern has been modified to remove the name while retaining the intent of the comment.

  2. Horizon-absorption effects in coalescing black-hole binaries: An effective-one-body study of the non-spinning case

    E-Print Network [OSTI]

    Sebastiano Bernuzzi; Alessandro Nagar; Anil Zenginoglu

    2012-12-19T23:59:59.000Z

    We study the horizon absorption of gravitational waves in coalescing, circularized, nonspinning black hole binaries. The horizon absorbed fluxes of a binary with a large mass ratio (q=1000) obtained by numerical perturbative simulations are compared with an analytical, effective-one-body (EOB) resummed expression recently proposed. The perturbative method employs an analytical, linear in the mass ratio, effective-one-body (EOB) resummed radiation reaction, and the Regge-Wheeler-Zerilli (RWZ) formalism for wave extraction. Hyperboloidal (transmitting) layers are employed for the numerical solution of the RWZ equations to accurately compute horizon fluxes up to the late plunge phase. The horizon fluxes from perturbative simulations and the EOB-resummed expression agree at the level of a few percent down to the late plunge. An upgrade of the EOB model for nonspinning binaries that includes horizon absorption of angular momentum as an additional term in the resummed radiation reaction is then discussed. The effect of this term on the waveform phasing for binaries with mass ratios spanning 1 to 1000 is investigated. We confirm that for comparable and intermediate-mass-ratio binaries horizon absorbtion is practically negligible for detection with advanced LIGO and the Einstein Telescope (faithfulness greater than or equal to 0.997).

  3. Modelling signal interactions with application to financial time series

    E-Print Network [OSTI]

    Jain, Bonny

    2014-01-01T23:59:59.000Z

    In this thesis, we concern ourselves with the problem of reasoning over a set of objects evolving over time that are coupled through interaction structures that are themselves changing over time. We focus on inferring ...

  4. Validity of conventional assumptions concerning flexible response. Research report

    SciTech Connect (OSTI)

    Gutierrez, M.J.

    1989-01-01T23:59:59.000Z

    The North Atlantic Treaty Organization is an alliance for collective defense. Made up of 16 countries, NATO has been a successful alliance because there has been no war in Europe since 1945. In 1967, NATO adopted the strategy of flexible response, a strategy dependent upon conventional, tactical nuclear, and strategic nuclear weapons to provide deterrence from a Warsaw Pact attack. Although successful, NATO is suffering from an erosion in conventional strength. NATO continues to make assumptions about its conventional capabilities to successfully meet the requirements of the flexible response strategy. In the present day world of NATO, there is limited funding, a fact that is not likely to change any time in the foreseeable future. Limited funding makes it impossible to buy all the conventional force structure needed to ideally support the current strategy, also a fact that is unlikely to change. This paper shows limitations in some of the ways NATO assumes it can conventionally perform its mission. It is the author's position that NATO should modernize its conventional thinking to make it more in line with the realities of the situation NATO finds itself in today.

  5. Valuation of environmental quality and eco-cultural attributes in Northwestern Idaho: Native Americans are more concerned than Caucasians

    SciTech Connect (OSTI)

    Burger, Joanna, E-mail: burger@biology.rutgers.edu [Division of Life Sciences, Nelson Biological Laboratory, Consortium for Risk Evaluation with Stakeholder Participation, Piscataway, NJ 08854-8082 (United States) [Division of Life Sciences, Nelson Biological Laboratory, Consortium for Risk Evaluation with Stakeholder Participation, Piscataway, NJ 08854-8082 (United States); Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854-8082 (United States)

    2011-01-15T23:59:59.000Z

    Valuation of features of habitats and ecosystems usually encompasses the goods and services that ecosystems provide, but rarely also examine how people value ecological resources in terms of eco-cultural and sacred activities. The social, sacred, and cultural aspects of ecosystems are particularly important to Native Americans, but western science has rarely examined the importance of eco-cultural attributes quantitatively. In this paper I explore differences in ecosystem evaluations, and compare the perceptions and evaluations of places people go for consumptive and non-consumptive resource use with evaluations of the same qualities for religious and sacred places. Qualities of ecosystems included goods (abundant fish and crabs, butterflies and flowers, clean water), services (complexity of nature, lack of radionuclides that present a health risk), and eco-cultural attributes (appears unspoiled, scenic horizons, noise-free). Native Americans and Caucasians were interviewed at a Pow Wow at Post Falls, Idaho, which is in the region with the Department of Energy's Hanford Site, known for its storage of radioactive wastes and contamination. A higher percentage of Native American subjects engaged in consumptive and religious activities than did Caucasians. Native Americans engaged in higher rates of many activities than did Caucasians, including commune with nature, pray or meditate, fish or hunt, collect herbs, and conduct vision quests or other ceremonies. For nearly all attributes, there was no difference in the relative ratings given by Native Americans for characteristics of sites used for consumption/non-consumptive activities compared to religious/sacred places. However, Caucasians rated nearly all attributes lower for religious/sacred places than they did for places where they engaged in consumptive or non-consumptive activities. Native Americans were less concerned with distance from home for consumptive/non-consumptive activities, compared to religious activities. - Research Highlights: {yields} A higher percentage of Native Americans engaged in consumptive and religious activities than did Caucasians interviewed. {yields} Caucasians rated environmental attributes as more important for consumptive and non-consumptive activities than they did for places where they engaged in religious/cultural ones. {yields} Native Americans rated environmental attributes as equally important regardless of the activities performed. {yields} Eco-cultural attributes (such as 'appears unspoiled') were rated as high as ecosystem services (e.g. unpolluted water).

  6. DRAFT- DOE O 442.1B, Department of Energy Employee Concerns Program

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

    The purpose of this Order is to maintain an Employee Concerns Program (ECP) at the Department of Energy (DOE), including the National Nuclear Security Administration (NNSA) that encourages the free and open expression of employee concerns and provides DOE federal, contractor, and sub contractor employees with an independent avenue to raise any concern related, but not limited, to the environment, safety, health, security, quality, and management, as well as harassment, intimidation, retaliation, and discrimination (HIRD).

  7. Low-income consumers, though less aware of genetically modified foods, are concerned and want labels

    E-Print Network [OSTI]

    King, Nicelma J.

    2003-01-01T23:59:59.000Z

    sentiment about genetically modified food. Pew Initia- tiveless aware of genetically modified foods, are concerned andattitudes about genetically modified foods have been

  8. Reporting and Investigating Animal Welfare Concerns Policy Approved by UGA IACUC October 1997

    E-Print Network [OSTI]

    Arnold, Jonathan

    Reporting and Investigating Animal Welfare Concerns Policy Approved by UGA IACUC October 1997 IACUC October 1997 Revised August 2014 next level of responsibility within your department or college

  9. TransPlanckian Particles and the Quantization of Time

    E-Print Network [OSTI]

    G. 't Hooft

    1998-05-20T23:59:59.000Z

    Trans-Planckian particles are elementary particles accelerated such that their energies surpass the Planck value. There are several reasons to believe that trans-Planckian particles do not represent independent degrees of freedom in Hilbert space, but they are controlled by the cis-Planckian particles. A way to learn more about the mechanisms at work here, is to study black hole horizons, starting from the scattering matrix Ansatz. By compactifying one of the three physical spacial dimensions, the scattering matrix Ansatz can be exploited more efficiently than before. The algebra of operators on a black hole horizon allows for a few distinct representations. It is found that this horizon can be seen as being built up from string bits with unit lengths, each of which being described by a representation of the SO(2,1) Lorentz group. We then demonstrate how the holographic principle works for this case, by constructing the operators corresponding to a field in space-time. The parameter t turns out to be quantized in Planckian units, divided by the period R of the compactified dimension.

  10. Real Time Search User Behavior Real time search is an increasingly important area of

    E-Print Network [OSTI]

    Jansen, James

    . The most frequently used terms accounted for only 0.03% of the total terms. Concerning search topics Web search. Searchers of real time content often repeat queries overtime, perhaps indicating long term content increasingly enters the main stream. Keywords Real time search, real time content, Collecta

  11. WIPP Sampling and Analysis Plan for Solid Waste Management Units and Areas of Concern.

    SciTech Connect (OSTI)

    Washington TRU Solutions LLC

    2000-05-23T23:59:59.000Z

    This Sampling and Analysis Plan (SAP) has been prepared to fulfill requirements of Module VII, Section VII.M.2 and Table VII.1, requirement 4 of the Waste Isolation Pilot Plant (WIPP) Hazardous Waste Permit, NM4890139088-TSDF (the Permit); (NMED [New Mexico Environment Department], 1999a). This SAP describes the approach for investigation of the Solid Waste Management Units (SWMU) and Areas of Concern (AOC) specified in the Permit. This SAP addresses the current Permit requirements for a RCRA Facility Investigation(RFI) investigation of SWMUs and AOCs. It uses the results of previous investigations performed at WIPP and expands the investigations as required by the Permit. As an alternative to the RFI specified in Module VII of the Permit, current NMED guidance identifies an Accelerated Corrective Action Approach (ACAA) that may be used for any SWMU or AOC (NMED, 1998). This accelerated approach is used to replace the standard RFI work plan and report sequence with a more flexible decision-making approach. The ACAA process allows a facility to exit the schedule of compliance contained in the facility's Hazardous and Solid Waste Amendments (HSWA) permit module and proceed on an accelerated time frame. Thus, the ACAA process can beentered either before or after a RFI work plan. According to NMED's guidance, a facility can prepare a RFI work plan or SAP for any SWMU or AOC (NMED, 1998).

  12. WORKING PAPER N 2012 33 Social-and Self-Image Concerns in Fair-Trade

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    WORKING PAPER N° 2012 ­ 33 Social- and Self-Image Concerns in Fair-Trade Consumption: Evidence from01 Keywords: Fair-trade ; Image Motivations ; Willingness-to-pay ; Experiment ; Chocolate PARIS AGRONOMIQUE halshs-00722592,version1-2Aug2012 #12;1 Social- and Self-Image Concerns in Fair-Trade Consumption

  13. LED Lighting Flicker and Potential Health Concerns: IEEE Standard PAR1789 Update

    E-Print Network [OSTI]

    Lehman, Brad

    LED Lighting Flicker and Potential Health Concerns: IEEE Standard PAR1789 Update Arnold Wilkins for mitigating health risks to viewers" has been formed to advise the lighting industry, ANSI/NEMA, IEC, EnergyStar and other standards groups about the emerging concern of flicker in LED lighting. This paper introduces

  14. Who do you trust? Information Sharing, Privacy Concerns and Trust in an online Social Network

    E-Print Network [OSTI]

    Islam, M. Saif

    Who do you trust? Information Sharing, Privacy Concerns and Trust in an online Social Network of a popular social network site, Facebook, which measured perceptions of trust, privacy concerns, differences between online and offline social networking and between usage of the site by gender. We find

  15. THE VALUE OF ROLLING-HORIZON POLICIES FOR RISK-AVERSE ...

    E-Print Network [OSTI]

    2011-09-17T23:59:59.000Z

    The problem of measuring hydraulic risk for the OOP was first explored in Brignol ..... time step; a nonnegative control variable ut, the turbine outflow; and ?t, the ...

  16. Entropic Time

    SciTech Connect (OSTI)

    Caticha, Ariel [Department of Physics, University at Albany-SUNY, Albany, NY 12222 (United States)

    2011-03-14T23:59:59.000Z

    The formulation of quantum mechanics within the framework of entropic dynamics includes several new elements. In this paper we concentrate on one of them: the implications for the theory of time. Entropic time is introduced as a book-keeping device to keep track of the accumulation of changes. One new feature is that, unlike other concepts of time appearing in the so-called fundamental laws of physics, entropic time incorporates a natural distinction between past and future.

  17. The holographic mapping of the Standard Model onto the black hole horizon, Part I: Abelian vector field, scalar field and BEH Mechanism

    E-Print Network [OSTI]

    G. 't Hooft

    2005-04-25T23:59:59.000Z

    Interactions between outgoing Hawking particles and ingoing matter are determined by gravitational forces and Standard Model interactions. In particular the gravitational interactions are responsible for the unitarity of the scattering against the horizon, as dictated by the holographic principle, but the Standard Model interactions also contribute, and understanding their effects is an important first step towards a complete understanding of the horizon's dynamics. The relation between in- and outgoing states is described in terms of an operator algebra. In this paper, the first of a series, we describe the algebra induced on the horizon by U(1) vector fields and scalar fields, including the case of an Englert-Brout-Higgs mechanism, and a more careful consideration of the transverse vector field components.

  18. Environmental disaster or just a drop in the bucket: Texas scientists on the real effects of the Deewater Horizon oil spill 

    E-Print Network [OSTI]

    Lee, Leslie

    2011-01-01T23:59:59.000Z

    Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline pumped into cars, seafood eaten at restaurants... but forgo#27;en as the wreckage of the Deepwater Horizon MC#31;#30;#31; drilling platform sank into its waters. A crude awakening Like any large oil spill, this one took its toll in many ways. Eleven BP employees on the rig died in the explosion...

  19. Environmental disaster or just a drop in the bucket?: Texas scientists on the real effects of the Deepwater Horizon oil spill 

    E-Print Network [OSTI]

    Lee, Leslie

    2011-01-01T23:59:59.000Z

    Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline pumped into cars, seafood eaten at restaurants... but forgo#27;en as the wreckage of the Deepwater Horizon MC#31;#30;#31; drilling platform sank into its waters. A crude awakening Like any large oil spill, this one took its toll in many ways. Eleven BP employees on the rig died in the explosion...

  20. The use of real-time off-site observations as a methodology for increasing forecast skill in prediction of large wind power ramps one or more hours ahead of their impact on a wind plant.

    SciTech Connect (OSTI)

    Martin Wilde, Principal Investigator

    2012-12-31T23:59:59.000Z

    ABSTRACT Application of Real-Time Offsite Measurements in Improved Short-Term Wind Ramp Prediction Skill Improved forecasting performance immediately preceding wind ramp events is of preeminent concern to most wind energy companies, system operators, and balancing authorities. The value of near real-time hub height-level wind data and more general meteorological measurements to short-term wind power forecasting is well understood. For some sites, access to onsite measured wind data - even historical - can reduce forecast error in the short-range to medium-range horizons by as much as 50%. Unfortunately, valuable free-stream wind measurements at tall tower are not typically available at most wind plants, thereby forcing wind forecasters to rely upon wind measurements below hub height and/or turbine nacelle anemometry. Free-stream measurements can be appropriately scaled to hub-height levels, using existing empirically-derived relationships that account for surface roughness and turbulence. But there is large uncertainty in these relationships for a given time of day and state of the boundary layer. Alternatively, forecasts can rely entirely on turbine anemometry measurements, though such measurements are themselves subject to wake effects that are not stationary. The void in free-stream hub-height level measurements of wind can be filled by remote sensing (e.g., sodar, lidar, and radar). However, the expense of such equipment may not be sustainable. There is a growing market for traditional anemometry on tall tower networks, maintained by third parties to the forecasting process (i.e., independent of forecasters and the forecast users). This study examines the value of offsite tall-tower data from the WINDataNOW Technology network for short-horizon wind power predictions at a wind farm in northern Montana. The presentation shall describe successful physical and statistical techniques for its application and the practicality of its application in an operational setting. It shall be demonstrated that when used properly, the real-time offsite measurements materially improve wind ramp capture and prediction statistics, when compared to traditional wind forecasting techniques and to a simple persistence model.

  1. HESSD '98 17 Safety concerns at Ontario Hydro: The need for safety

    E-Print Network [OSTI]

    Lee, John D.

    HESSD '98 17 Safety concerns at Ontario Hydro: The need for safety management through incident of complex socio-technical systems Ontario Hydro -- one of the largest electrical utilities in North America

  2. Tackling Community Concerns about Commercialisation and Genetic Research: A Modest Interdisciplinary Proposal 

    E-Print Network [OSTI]

    Laurie, Graeme; Hunter, Kathryn; Cunningham-Burley, Sarah; Haddow, Gill

    2007-01-01T23:59:59.000Z

    In recent years, there has been a rise in the creation of DNA databases promising a range of health benefits to individuals and populations. This development has been accompanied by an interest in, and concern for the ...

  3. will help to address these questions. A more practical concern is what happens

    E-Print Network [OSTI]

    Lee, Cin-Ty Aeolus

    will help to address these questions. A more practical concern is what happens next. Eutrophication, in the most polluted lakes. This finding is consistent with the hypothesis that eutrophication reduced eco

  4. Regulation 29: Other Regulations concerning the University site and buildings, Computing Regulations and Miscellaneous Administrative Regulations

    E-Print Network [OSTI]

    Sussex, University of

    Regulations and Miscellaneous Administrative Regulations 190 nuisance to occupants, except in designated (Vehicle Operators and Penalty Notices) Regulations; (iii) allow smoking in designated study bedroomsRegulation 29: Other Regulations concerning the University site and buildings, Computing

  5. The Influence of Weight Concerns and Weight Control Expectancies in the Smoking Behavior of Spanish Adolescents

    E-Print Network [OSTI]

    Berrios-Hernandez, Mayra

    2012-07-16T23:59:59.000Z

    ) from schools in Alicante, Spain. The students completed questionnaires regarding smoking history and status. They also responded to questions regarding smoking expectancies and weigh concerns. Results suggested differences between smokers...

  6. A human factors study of population stereotypes concerning hand- held teach pendants

    E-Print Network [OSTI]

    Pate, Dennis Wayne

    1993-01-01T23:59:59.000Z

    This study was conducted to determined the population stereotypes of a group of novice robot users . The study focused on the stereotypes concerning the design of teach pendants for horizontally articulated robots. Expectancies from a written...

  7. An evaluation of theories concerning the health effects of low-dose radiation exposures

    E-Print Network [OSTI]

    Wei, Elizabeth J. (Elizabeth Jay)

    2012-01-01T23:59:59.000Z

    The danger of high, acute doses of radiation is well documented, but the effects of low-dose radiation below 100 mSv is still heavily debated. Four theories concerning the effects of lowdose radiation are presented here: ...

  8. Endocrine Active Chemicals, Pharmaceuticals, and Other Chemicals of Concern in Surface Water, Wastewater-

    E-Print Network [OSTI]

    , Wastewater- Treatment Plant Effluent, and Bed Sediment, and Biological Characteristics in Selected Streams Water, Wastewater- Treatment Plant Effluent, and Bed Sediment, and Biological Characteristics Chemicals, Pharmaceuticals, and Other Chemicals of Concern in Surface Water, Wastewater- Treatment Plant

  9. Free Energies and Probe Actions for Near-horizon D-branes and D1 + D5 System

    E-Print Network [OSTI]

    Shijong Ryang

    1999-03-18T23:59:59.000Z

    By working with the free energy for the type II supergravity near-horizon solution of N coincident non-extremal Dp-branes we study the transitions among the non-conformal Dp-brane system, the perturbative super Yang-Mills theory and a certain system associated with M theory. We derive a relation between this free energy and the action of a Dp-brane probe in the N Dp-brane background. Constructing the free energy for the five dimensional black hole labeled by the D1-brane and D5-brane charges we find the similar relation between it and the action of a D1 or D5 brane probe in the D1 + D5 brane background. These relations are explained by the massive open strings stretched between the relevant D-branes

  10. A study of the attitudes of Arkansas school superintendents concerning sex education classes

    E-Print Network [OSTI]

    Fields, Tina Taylor

    1974-01-01T23:59:59.000Z

    A STUDY OF THE ATTITUDES OF ARKANSAS SCHOOL SUPERINTENDENTS CONCERNING SEX EDUCATION CLASSES A Thesis by TINA TAYLOR FIELDS Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE December 1974 Ma]or Subject: Health and Physical Education A STUDY OF THE ATTITUDES OF ARKANSAS SCHOOL SUPERINTENDENTS CONCERNING SEX EDUCATION CLASSES A Thesis by TINA TAYLOR FIELDS Approved as to style d content by: (Chairman...

  11. 1.1.1.1. CODE D'ETHIQUE CONCERNANT LA RECHERCHE AU SEIN DE LACODE D'ETHIQUE CONCERNANT LA RECHERCHE AU SEIN DE LACODE D'ETHIQUE CONCERNANT LA RECHERCHE AU SEIN DE LACODE D'ETHIQUE CONCERNANT LA RECHERCHE AU SEIN DE LA FACULTE DE PSYCHOLOGIE ET DES SCIENCE

    E-Print Network [OSTI]

    Halazonetis, Thanos

    1.1.1.1. CODE D'ETHIQUE CONCERNANT LA RECHERCHE AU SEIN DE LACODE D'ETHIQUE CONCERNANT LA RECHERCHE SCIENCES DE L'EDUCATION I.I.I.I. PREAMBULEPREAMBULEPREAMBULEPREAMBULE Un code d'éthique n'est pas nécessairement sur les personnes et les institutions, ne serait-ce que parce qu'elle peut modifier leurs

  12. An investigation of three problems concerning the analysis of airborne asphalt fumes

    E-Print Network [OSTI]

    Laird, Larry Teal

    1981-01-01T23:59:59.000Z

    AN INVESTIGATION OF THREE PROBLEMS CONCERNING THE ANALYSIS OF AIRBORNE ASPHALT FUMES A Thesis by LARRY TEAL LAIRD Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1981 Major Subject: Industrial Hygiene AN INVESTIGATION OF THREE PROBLEMS CONCERNING THE ANALYSIS OF AIRBORNE ASPHALT FUMES A Thesis by LARRY T. LAIRD Approved as to style and content by: (Chairm of Committee) (Head of Department...

  13. Trajectory Forecast as a Rapid Response to the Deepwater Horizon Oil Spill Yonggang Liu, Robert H. Weisberg, Chuanmin Hu, and Lianyuan Zheng

    E-Print Network [OSTI]

    Meyers, Steven D.

    offshore oil spill in U.S. history. This spill, which continued for 3 months, presented an unprecedented spills in many ways. Crude oil was introduced at the ocean bottom in 1500 m of water, a depthTrajectory Forecast as a Rapid Response to the Deepwater Horizon Oil Spill Yonggang Liu, Robert H

  14. Of the estimated 5 million barrels of crude oil released into the Gulf of Mexico from the Deepwater Horizon oil spill, a

    E-Print Network [OSTI]

    Weston, Ken

    Of the estimated 5 million barrels of crude oil released into the Gulf of Mexico from the Deepwater Horizon oil spill, a fraction washed ashore onto sandy beaches from Louisiana to the Florida panhandle. Researchers at the MagLab compare the detailed molecular analysis of hydrocarbons in oiled sands from

  15. DEEPWATER HORIZON OIL SPILL ESTIMATE: UPDATE JUNE 11, 2010 by Professor Satish Nagarajaiah, Rice University (www.ruf.rice.edu/~nagaraja &

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    DEEPWATER HORIZON OIL SPILL ESTIMATE: UPDATE JUNE 11, 2010 by Professor Satish Nagarajaiah, Rice. http://www.nytimes.com/2010/06/11/us/11spill.html?hp New Estimates Double Rate of Oil Flowing on Thursday essentially doubled its estimate of how much oil has been spewing from the out-of-control BP well

  16. Gaussian Processes for Short-Horizon Wind Power Forecasting Joseph Bockhorst, Chris Barber

    E-Print Network [OSTI]

    Bockhorst, Joseph

    on this task, and attention has shifted to statistical and machine learning approaches. Among the challenges of wind energy into electrical trans- mission systems. The importance of wind forecasts for wind energy throughout a power system must be nearly in balance at all times, 2) because it depends strongly on wind

  17. Energy Productivity Via Time-of-Day Rates

    E-Print Network [OSTI]

    Michael, R. S.

    1984-01-01T23:59:59.000Z

    Prompted by a combination of PURPA and a national concern about electricity price and supply, many utilities now have in place industrial time-of-day electric rates. When properly designed, these rates present an opportunity for energy...

  18. Monetary Policy, Nominal Interest Rates, and Long-horizon Inflation Uncertainty

    E-Print Network [OSTI]

    Wright, Stephen M

    2004-06-16T23:59:59.000Z

    of the countries examined in this paper (the United2 Kingdom and Canada) and only in the latter part of the historical period I examine. seem clear that the nature of the market imperfections will affect the nature of the objective. Price, and possibly inflation... at similar times in the early and late 1970s, and downward shocks in the mid-1980s. This is of course unsurprising given what we know about the history of oil and other commodity prices. (iii) Whilst the impulses were similar in all countries, the responses...

  19. The wind power probability density forecast problem can be formulated as: forecast the wind power pdf at time step t for each look-ahead time step t+k of a given time-horizon

    E-Print Network [OSTI]

    Kemner, Ken

    The wind power probability density forecast problem can be formulated as: forecast the wind power ahead) knowing a set of explanatory variables (e.g. numerical weather predictions (NWPs), wind power measured values). Translating this sentence to an equation, we have: where pt+k is the wind power

  20. Council Resolution concerning the admission of the Islamic Republic of Pakistan as Associate Member State at CERN

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    Council Resolution concerning the admission of the Islamic Republic of Pakistan as Associate Member State at CERN

  1. Letter to Mr. Podonsky from DOE and Contractor Attorneys' Association concerning 10 CFR 851 implementation issues, May 21, 2007

    Broader source: Energy.gov [DOE]

    Memorandum to Mr. Podonsky from DOE and Contractor Attorneys' Association concerning 10 CFR 851 implementation issues, May 21, 2007

  2. Adjudication Concerning the Contract for the Maintenance of Pipework and Heating, Ventilating and Air-Conditioning Installations

    E-Print Network [OSTI]

    1971-01-01T23:59:59.000Z

    Adjudication Concerning the Contract for the Maintenance of Pipework and Heating, Ventilating and Air-Conditioning Installations

  3. Proposal concerning the participation of CERN in the procurement of depleted-uranium sheets for the UA1 calorimeter upgrading

    E-Print Network [OSTI]

    1985-01-01T23:59:59.000Z

    Proposal concerning the participation of CERN in the procurement of depleted-uranium sheets for the UA1 calorimeter upgrading

  4. Biomass stakeholder views and concerns: Environmental groups and some trade association

    SciTech Connect (OSTI)

    Peelle, E.

    2000-01-01T23:59:59.000Z

    This exploratory study of the views and concerns of 25 environmental organizations found high interest and concern about which biomass feedstocks would be used and how these biomass materials would be converted to energy. While all favored renewable energy over fossil or nuclear energy, opinion diverged over whether energy crops, residues, or both should be the primary source of a biomass/bioenergy fuel cycle. About half of the discussants favored biomass ``in general'' as a renewable energy source, while the others were distributed about equally over five categories, from favor-with-conditions, uncertain, skeptical, opposed, to ``no organizational policy.''

  5. Report on the handling of safety information concerning flammable gases and ferrocyanide at the Hanford waste tanks

    SciTech Connect (OSTI)

    Not Available

    1990-07-01T23:59:59.000Z

    This report discusses concerns safety issues, and management at Hanford Tank Farm. Concerns center on the issue of flammable gas generation which could ignite, and on possible exothermic reactions of ferrocyanide compounds which were added to single shell tanks in the 1950's. It is believed that information concerning these issues has been mis-handled and the problems poorly managed. (CBS)

  6. Timely PTS Applications Critical to Staying Navy

    E-Print Network [OSTI]

    Timely PTS Applications Critical to Staying Navy Navy Personnel Command (NPC) is reminding commands and Sailors that submitting Perform to Serve (PTS) applications is the key to being able to stay Navy/10 explains how PTS is used to shape the Navy, and includes all business rules concerning. Commands must

  7. Quantum field theory in spaces with closed time-like curves

    SciTech Connect (OSTI)

    Boulware, D.G.

    1992-12-31T23:59:59.000Z

    Gott spacetime has closed timelike curves, but no locally anomalous stress-energy. A complete orthonormal set of eigenfunctions of the wave operator is found in the special case of a spacetime in which the total deficit angle is 27{pi}. A scalar quantum field theory is constructed using these eigenfunctions. The resultant interacting quantum field theory is not unitary because the field operators can create real, on-shell, particles in the acausal region. These particles propagate for finite proper time accumulating an arbitrary phase before being annihilated at the same spacetime point as that at which they were created. As a result, the effective potential within the acausal region is complex, and probability is not conserved. The stress tensor of the scalar field is evaluated in the neighborhood of the Cauchy horizon; in the case of a sufficiently small Compton wavelength of the field, the stress tensor is regular and cannot prevent the formation of the Cauchy horizon.

  8. Quantum field theory in spaces with closed time-like curves. [Gott space

    SciTech Connect (OSTI)

    Boulware, D.G.

    1992-01-01T23:59:59.000Z

    Gott spacetime has closed timelike curves, but no locally anomalous stress-energy. A complete orthonormal set of eigenfunctions of the wave operator is found in the special case of a spacetime in which the total deficit angle is 27[pi]. A scalar quantum field theory is constructed using these eigenfunctions. The resultant interacting quantum field theory is not unitary because the field operators can create real, on-shell, particles in the acausal region. These particles propagate for finite proper time accumulating an arbitrary phase before being annihilated at the same spacetime point as that at which they were created. As a result, the effective potential within the acausal region is complex, and probability is not conserved. The stress tensor of the scalar field is evaluated in the neighborhood of the Cauchy horizon; in the case of a sufficiently small Compton wavelength of the field, the stress tensor is regular and cannot prevent the formation of the Cauchy horizon.

  9. A critical concern for embedded sys tems is the need to deliver high levels of per

    E-Print Network [OSTI]

    Mudge, Trevor

    10 A critical concern for embedded sys­ tems is the need to deliver high levels of per­ formance voltage. Because dynam­ ic energy scales quadratically with supply volt­ age, DVS can significantly reduce energy use. 2 Enabling systems to run at multiple fre­ quency and voltage levels is challenging

  10. Relating the Evolution of Design Patterns and Crosscutting Concerns Lerina Aversano, Luigi Cerulo, Massimiliano Di Penta

    E-Print Network [OSTI]

    Di Penta, Massimiliano

    , Mining Software Repositories, Design Patterns, Crosscutting Concerns, Em- pirical Study. 1 Introduction-classing (for a Visitor this means that a new Concrete Visitor is available). Finally, the pattern in- terface and hierarchy may remain unchanged, while its im- plementation undergoes maintenance activities. These three

  11. Training for Emergencies Need for some uniformity of training across airlines. Concern is especially about

    E-Print Network [OSTI]

    Training for Emergencies · Need for some uniformity of training across airlines. Concern is especially about variability in amount of training for emergencies. Not enough training in general for emergencies. · What are the criteria for training for success. · Try a "hypertext" approach to simulator

  12. THE MATHEMATICS EDUCATION REFORM: WHY YOU SHOULD BE CONCERNED AND WHAT YOU CAN DO

    E-Print Network [OSTI]

    Wu, Hung-Hsi

    THE MATHEMATICS EDUCATION REFORM: WHY YOU SHOULD BE CONCERNED AND WHAT YOU CAN DO H. WU To Chih with another mathematics education reform. In the usual way in which this term is understood, it refers to both the K-12 mathematics education reform led by the National Council of Teachers of Mathematics (NCTM

  13. Concerning the generation of geomagnetic giant pulsations by drift-bounce resonance ring current instabilities

    E-Print Network [OSTI]

    Boyer, Edmond

    Concerning the generation of geomagnetic giant pulsations by drift-bounce resonance ring current magnetic and electric ®eld data and proton ¯ux measurements made in the geostationary orbit have been21 Æ 4, is in accord with the value m À27 Æ 6 determined from ground-magnetic measurements. A more

  14. Conclusions on the Analysis of User Requirements concerning the use of ICT in the Didactic Process

    E-Print Network [OSTI]

    Bouras, Christos

    Conclusions on the Analysis of User Requirements concerning the use of ICT in the Didactic Process, is deemed necessary for the adaptation and tuning of the didactic process in terms of pedagogical with the application of ICT in the didactic process. 1. Introduction It is nowadays more than evident that the rapid

  15. Risk Management in Component-based Development: A Separation of Concerns Perspective

    E-Print Network [OSTI]

    Risk Management in Component-based Development: A Separation of Concerns Perspective Awais Rashid development stages. We propose a risk management mechanism based on identifying risk management techniques of the risks involved and their management. In fact component-based development poses significant risks

  16. Introduction: The cost of energy is an important concern for businesses, institutions, and

    E-Print Network [OSTI]

    Aalberts, Daniel P.

    Introduction: The cost of energy is an important concern for businesses, institutions, and people that it sparked a serious interest in alternative energies. Much renewable energy, like solar, wind, geothermal. It did not gain popularity because the cost of oil was far lower than today, therefore reducing

  17. Close Out Report for the Ash Pit Operable Unit I Area of Concern 2F

    E-Print Network [OSTI]

    I to the early 1950's. The Ash Pits were also used for disposal of coal ash from various buildingsFinal Close Out Report for the Ash Pit Operable Unit I Area of Concern 2F February 5, 2004..................................................................................................2 Figure 1 - Ash Level Verification Borings

  18. Economics is a social science concerned with the economic behavior of consumers and producers as well

    E-Print Network [OSTI]

    5/2013 ECONOMICS Economics is a social science concerned with the economic behavior of consumers and producers as well as the operation and evaluation of economic systems. Economists study questions like why does the price of gasoline go up and down and what can we do to improve the economy. Studying economics

  19. A model problem concerning recoverable strains of shape-memory polycrystals

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A model problem concerning recoverable strains of shape-memory polycrystals K. Bhattacharya(1- tivated by the study of the shape-memory effect in polycrystalline media. Specifi- cally, it numerically This paper addresses a model problem of nonlinear homogenization in the plane motivated by the shape-memory

  20. 142 Computer Science 143 Computer science is concerned with the study of computers and computing,

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    142 Computer Science 143 Computer science is concerned with the study of computers and computing-world computational problems. Computer science is the intellectual discipline underlying information technology, which is widely accepted now as the ascendant technology of the next century. Students in computer science at Rice

  1. Distributing Classes with Woven Concerns An Exploration of Potential Fault Scenarios

    E-Print Network [OSTI]

    Alexander, Roger T.

    -oriented programming (AOP) promises to benefit software engineering by providing a layer of abstraction that can concerning long term maintenance issues with AOP in deployed commercial applications. Fault models that result from software maintenance in aspect-oriented software development (AOSD) are not nearly as well

  2. Summary of FNST Survey : Thoughts of the Community on progress, concerns, and next steps in FNST

    E-Print Network [OSTI]

    Abdou, Mohamed

    Summary of FNST Survey : Thoughts of the Community on progress, concerns, and next steps in FNST wall structures have been built and tested International efforts have amassed large database not be fabricable by current methods Effects such as corrosion with PbLi may severely limit operating temperature

  3. MPO Critique "Their role, as originally conceived, was to bring local concerns

    E-Print Network [OSTI]

    Handy, Susan L.

    who serve on MPO board for regional over local concerns ­ Central city versus suburban representation Public Works (City and County) Planning (City and County) Transportation vs. Land Use Planning #12;Where Program 2005 San Diego Pilot Smart Growth Incentive Program 2005 Southe

  4. New safety concerns over diabetes drugs Two drugs commonly prescribed to treat diabetes

    E-Print Network [OSTI]

    Feigon, Brooke

    New safety concerns over diabetes drugs Two drugs commonly prescribed to treat diabetes double of Type II Diabetes. Prescriptions for the drugs, known as thiazolidinediones, have doubled over the last. The results are published in the August edition of the journal Diabetes Care. Congregation 2007 page 5­9 Race

  5. Climate change beliefs, concerns, and attitudes toward adaptation and mitigation among farmers

    E-Print Network [OSTI]

    Holland, Jeffrey

    ). Because climate change-related threats to agriculture represent threats to quality of life on localLETTER Climate change beliefs, concerns, and attitudes toward adaptation and mitigation among and soybean revealed that 66 % of farmers believed climate change is occurring (8 % mostly anthropogenic, 33

  6. A note on a result of Buss concerning bounded theories and the collection scheme

    E-Print Network [OSTI]

    Edmundo, Mário Jorge

    A note on a result of Buss concerning bounded theories and the collection scheme Fernando Ferreira Abstract Samuel Buss showed that, under certain circunstances, adding the collection scheme for bounded of Samuel Buss (a good reference for bounded theories is Part C of [HP93]). In [B87] Buss presents two

  7. Potential Environmental Concerns vis-a-vis the Introduction of a Specific Trait: Experiences with Potatoes

    E-Print Network [OSTI]

    Douches, David S.

    : Experiences with Potatoes Engineered to Express Insect or Virus Resistance David S. Douches and Walter Pett Summary The paper addresses environmental concerns raised for transgenic potatoes with increased resistance to insects or viruses and discusses whether transgenic potato cultivars are different from

  8. The Temperature/Entropy Connection for Horizons, Massless Particle Scattering, and the Origin of Locality

    E-Print Network [OSTI]

    Banks, T

    2015-01-01T23:59:59.000Z

    I explain, in non-technical terms, the basic ideas of Holographic Space-time (HST) models of quantum gravity (QG). The key feature is that the degrees of freedom (DOF) of QG, localized in a finite causal diamond are restrictions of an algebra of asymptotic currents, describing flows of quantum numbers out to null infinity in Minkowski space, with zero energy density on the sphere at infinity. Finite energy density states are constrained states of these DOF and the resulting relation between asymptotic energy and the number of constraints, explains the relation between black hole entropy and energy, as well as the critical energy/impact parameter regime in which particle scattering leads to black hole formation. The results of a general class of models, implementing these principles, are described, and applied to understand the firewall paradox, and to construct a finite model of the early universe, which implements inflation with only the minimal fine tuning needed to obtain a universe containing localized ex...

  9. The generalized second law for the interacting new agegraphic dark energy in a non-flat FRW universe enclosed by the apparent horizon

    E-Print Network [OSTI]

    K. Karami; A. Abdolmaleki

    2011-01-31T23:59:59.000Z

    We investigate the validity of the generalized second law of gravitational thermodynamics in a non-flat FRW universe containing the interacting new agegraphic dark energy with cold dark matter. The boundary of the universe is assumed to be enclosed by the dynamical apparent horizon. We show that for this model, the equation of state parameter can cross the phantom divide. We also present that for the selected model under thermal equilibrium with the Hawking radiation, the generalized second law is always satisfied throughout the history of the universe. Whereas, the evolution of the entropy of the universe and apparent horizon, separately, depends on the equation of state parameter of the interacting new agegraphic dark energy model.

  10. Time Off

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solidSynthesis ofwas publishedThree scientistsDepartmentTime Off

  11. Hs@~7A Receding Horizon @)8f$K4p$E$/ ;k3P%U%#!<%I%P%C%/$K$D$$$F

    E-Print Network [OSTI]

    with the vision-based robot motion control via the nonlinear receding horizon control approach. We propose feedback control law. The control goal is to place the planar robot end-e#11;ector over a desired static. ;~9ot $K$*$$$F, M­8B6h4V [t; t +T ] $G:GE,2=LdBj$r2r$­, $=$N:]$N2r$H$7$F, :GE,@)8fB'u #3; (#28

  12. 3-D seismic surveys generate 5-D data volume. In order to estimate the horizons for interpretation and further processing, the traveltime picking needs to be performed on n-D subsets of this 5-D data volume (n5). Horizon

    E-Print Network [OSTI]

    Nicoli, Monica

    Abstract 3-D seismic surveys generate 5-D data volume. In order to estimate the horizons for interpretation and further processing, the traveltime picking needs to be performed on n-D subsets of this 5-D to support the interpreters in the estimation of the events by preserving their depth continuity. The HP

  13. Beyond Space-Time

    E-Print Network [OSTI]

    A. M. Polyakov

    2006-02-01T23:59:59.000Z

    These notes, based on the remarks made at the 23 Solvay Conference, collect several speculative ideas concerning gauge/ strings duality, de Sitter spaces, dimensionality and the cosmological constant.

  14. Physical Protection of Spent Fuel Shipments: Resolution of Stakeholder Concerns Through Rulemaking - 12284

    SciTech Connect (OSTI)

    Ballard, James D. [Department of Sociology, California State University, Northridge, Northridge, CA 91330 (United States); Halstead, Robert J. [State of Nevada Agency for Nuclear Projects Carson City, NV 89706 (United States); Dilger, Fred [Black Mountain Research, Henderson, NV 81012 (United States)

    2012-07-01T23:59:59.000Z

    In 1999, the State of Nevada brought its concerns about physical protection of current spent nuclear fuel (SNF) shipments, and future SNF shipments to a federal repository, before the NRC in a 1999 petition for rulemaking (PRM-73-10). In October 2010, the NRC published a rulemaking decision which would significantly strengthen physical protection of SNF in transit. The newest articulation of the rule (10 CFR 73.37) incorporates regulatory clarifications and security enhancements requested in Nevada's 1999 petition for rulemaking, codifies the findings of the Nuclear NRC and DOE consequence analyses into policy guidance documents and brings forward into regulations the agency and licensee experience gained since the terrorist attacks of September 11, 2001. Although at present DOE SNF shipments would continue to be exempt from these NRC regulations, Nevada considers the rule to constitute a largely satisfactory resolution to stakeholder concerns raised in the original petition and in subsequent comments submitted to the NRC. This paper reviews the process of regulatory changes, assesses the specific improvements contained in the new rules and briefly describes the significance of the new rule in the context of a future national nuclear waste management program. Nevada's petition for rulemaking led to a generally satisfactory resolution of the State's concerns. The decade plus timeframe from petition to rulemaking conclusion saw a sea change in many aspects of the relevant issues - perhaps most importantly the attacks on 9/11 led to the recognition by regulatory bodies that a new threat environment exists wherein shipments of SNF and HLW pose a viable target for human initiated events. The State of Nevada has always considered security a critical concern for the transport of these highly radioactive materials. This was one of the primary reasons for the original rulemaking petition and subsequent advocacy by Nevada on related issues. NRC decisions on the majority of the concerns expressed in the petition, additional developments by other regulatory bodies and the change in how the United States sees threats to the homeland - all of these produced a satisfactory resolution through the rulemaking process. While not all of the concerns expressed by Nevada were addressed in the proposed rule and significant challenges face any programmatic shipment campaign in the future, the lesson learned on this occasion is that stakeholder concerns can be resolved through rulemaking. If DOE would engage with stakeholders on its role in transport of SNF and HLW under the NWPA, these concerns would be better addressed. Specifically the attempts by DOE to resist transportation and security regulations now considered necessary by the NRC for the adequate protection of the shipments of highly radioactive materials, these DOE efforts seem ill advised. One clear lesson learned from this successful rulemaking petition process is that the system of stakeholder input can work to better the regulatory environment. (authors)

  15. Effects of Recreation Participation and Tildenian Interpretation on Tourists’ Environmental Concern

    E-Print Network [OSTI]

    Satchabut, Thitikan

    2013-04-24T23:59:59.000Z

    Student Council (GSC) at TAMU for providing me a travel grant to collect my data in Thailand. My earnest gratitude extends to the faculty and staff at Phattalung Polytechnic College (PPC), staff at Thale Noi Waterfowl Park, local sponsors in Phattalung... in the developing world (Ignatow, 2006). Aoyagi-Usui, Vinken, and Kuribayashi (2003) noted that, ?few studies have been conducted in Asian contexts? (p. 25). Pornpitakpan (2001) thus suggested, ?An index of environmental concern in Thailand serves as a...

  16. Remarks Concerning the Public Utility Commission of Texas Study on Bulk Power Transmission

    E-Print Network [OSTI]

    Sweatman, R. T.

    REMARKS CONCERNING THE PUBLIC UTILITY COMMISSION OF TEXAS STUDY ON BULK POWER TRANSMISSION R. T. SWEATMAN Executive Director Electric Reliability Council of Texas The citizens of Texas need reliable electric service. Our economy, our way... amounts of transmission capacity must alwavs be available in the event generation is lost in one area, so that the other utility's power can be transmitted to the utility in need. A pipeline system can suffer equipment outages easily, without loss...

  17. LMFBR conceptual design study: an overview of environmental and safety concerns

    SciTech Connect (OSTI)

    Brenchley, D.L.

    1981-06-01T23:59:59.000Z

    The US Department of Energy (DOE) initiated the Liquid Metal Fast Breeder (LMFBR) Conceptual Design Study (CDS) with the objective of maintaining a viable breeder option. The project is scheduled to be completed in FY-1981 but decisions regarding plant construction will be delayed until at least 1985. This report provides a review of the potential environmental and safety engineering concerns for the CDS and recommends specific action for the Environmental and Safety Engineering Division of DOE.

  18. Heat release by controlled continuous-time Markov jump processes

    E-Print Network [OSTI]

    Paolo Muratore-Ginanneschi; Carlos Mejía-Monasterio; Luca Peliti

    2012-12-17T23:59:59.000Z

    We derive the equations governing the protocols minimizing the heat released by a continuous-time Markov jump process on a one-dimensional countable state space during a transition between assigned initial and final probability distributions in a finite time horizon. In particular, we identify the hypotheses on the transition rates under which the optimal control strategy and the probability distribution of the Markov jump problem obey a system of differential equations of Hamilton-Bellman-Jacobi-type. As the state-space mesh tends to zero, these equations converge to those satisfied by the diffusion process minimizing the heat released in the Langevin formulation of the same problem. We also show that in full analogy with the continuum case, heat minimization is equivalent to entropy production minimization. Thus, our results may be interpreted as a refined version of the second law of thermodynamics.

  19. Background Energy efficiency has become a growing concern in a world driven by a fossil fuel economy. To this end,

    E-Print Network [OSTI]

    Dawson, Jeff W.

    Background Energy efficiency has become a growing concern in a world driven by a fossil fuel have been developed at Brayton Energy Canada, but several difficulties are encountered

  20. Horizon 2020: Excellent Science

    E-Print Network [OSTI]

    De Cindio, Fiorella

    agriculture, marine and maritime research & the bioeconomy Secure, clean and efficient energy Smart, green

  1. Expanding Professional Horizons

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

    expands daily, by leaps and bounds - knowledge turnover must be accompanied by an infusion of new talent that both informs and is informed by existing, experienced staff. With...

  2. Screening Stringy Horizons

    E-Print Network [OSTI]

    Giribet, Gaston

    2015-01-01T23:59:59.000Z

    It has been argued recently that string theory effects qualitatively modify the effective black hole geometry experienced by modes with radial momentum of order $1/\\sqrt{\\alpha'}$. At tree level, these $\\alpha'$-effects can be explicitly worked out in two-dimensional string theory, and have a natural explanation in the T-dual description as coming from the integration of the zero-mode of the linear dilaton, what yields a contribution that affects the scattering phase-shift in a peculiar manner. It has also been argued that the phase-shift modification has its origin in a region of the moduli space that does not belong to the exterior black hole geometry, leading to the conclusion that at high energy the physics of the problem is better described by the dual model. Here, we elaborate on this argument. We consider the contribution of worldsheet instantons in the 2D Euclidean black hole sigma-model and study its influence on the phase-shift at high energy.

  3. Screening Stringy Horizons

    E-Print Network [OSTI]

    Gaston Giribet; Arash Ranjbar

    2015-04-20T23:59:59.000Z

    It has been argued recently that string theory effects qualitatively modify the effective black hole geometry experienced by modes with radial momentum of order $1/\\sqrt{\\alpha'}$. At tree level, these $\\alpha'$-effects can be explicitly worked out in two-dimensional string theory, and have a natural explanation in the T-dual description as coming from the integration of the zero-mode of the linear dilaton, what yields a contribution that affects the scattering phase-shift in a peculiar manner. It has also been argued that the phase-shift modification has its origin in a region of the moduli space that does not belong to the exterior black hole geometry, leading to the conclusion that at high energy the physics of the problem is better described by the dual model. Here, we elaborate on this argument. We consider the contribution of worldsheet instantons in the 2D Euclidean black hole sigma-model and study its influence on the phase-shift at high energy.

  4. LLNL 1981: technical horizons

    SciTech Connect (OSTI)

    Not Available

    1981-07-01T23:59:59.000Z

    Research programs at LLNL for 1981 are described in broad terms. In his annual State of the Laboratory address, Director Roger Batzel projected a $481 million operating budget for fiscal year 1982, up nearly 13% from last year. In projects for the Department of Energy and the Department of Defense, the Laboratory applies its technical facilities and capabilities to nuclear weapons design and development and other areas of defense research that include inertial confinement fusion, nonnuclear ordnances, and particle-beam technology. LLNL is also applying its unique experience and capabilities to a variety of projects that will help the nation meet its energy needs in an environmentally acceptable manner. A sampling of recent achievements by LLNL support organizations indicates their diversity. (GHT)

  5. Expanding Professional Horizons

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist. Category UC-l 1,Energy Consumers | Department ofa KeyErin *

  6. The practice of design is at the central core of engineering. While the basic sciences are concerned with the discovery of new knowledge, engineering is concerned with the application

    E-Print Network [OSTI]

    Chini, Gregory P.

    are concerned with the discovery of new knowledge, engineering is concerned with the application of existing a synthesis of creativity, basic scientific knowledge, engineering analysis and project management skillsDesign The practice of design is at the central core of engineering. While the basic sciences

  7. Framework for Identifying Key Environmental Concerns in Marine Renewable Energy Projects- Appendices

    SciTech Connect (OSTI)

    Sharon Kramer; Mirko Previsic; Peter Nelson; Sheri Woo

    2010-06-17T23:59:59.000Z

    Marine wave and tidal energy technology could interact with marine resources in ways that are not well understood. As wave and tidal energy conversion projects are planned, tested, and deployed, a wide range of stakeholders will be engaged; these include developers, state and federal regulatory agencies, environmental groups, tribal governments, recreational and commercial fishermen, and local communities. Identifying stakeholders’ environmental concerns in the early stages of the industry’s development will help developers address and minimize potential environmental effects. Identifying important concerns will also assist with streamlining siting and associated permitting processes, which are considered key hurdles by the industry in the U.S. today. In September 2008, RE Vision consulting, LLC was selected by the Department of Energy (DoE) to conduct a scenario-based evaluation of emerging hydrokinetic technologies. The purpose of this evaluation is to identify and characterize environmental impacts that are likely to occur, demonstrate a process for analyzing these impacts, identify the “key” environmental concerns for each scenario, identify areas of uncertainty, and describe studies that could address that uncertainty. This process is intended to provide an objective and transparent tool to assist in decision-making for siting and selection of technology for wave and tidal energy development. RE Vision worked with H. T. Harvey & Associates, to develop a framework for identifying key environmental concerns with marine renewable technology. This report describes the results of this study. This framework was applied to varying wave and tidal power conversion technologies, scales, and locations. The following wave and tidal energy scenarios were considered: ? 4 wave energy generation technologies ? 3 tidal energy generation technologies ? 3 sites: Humboldt coast, California (wave); Makapu’u Point, Oahu, Hawaii (wave); and the Tacoma Narrows, Washington (tidal) ? 3 project sizes: pilot, small commercial, and large commercial The possible combinations total 24 wave technology scenarios and 9 tidal technology scenarios. We evaluated 3 of the 33 scenarios in detail: 1. A small commercial OPT Power Buoy project off the Humboldt County, California coast 2. A small commercial Pelamis Wave Power P-2 project off Makapu’u Point, Oahu, Hawaii 3. A pilot MCT SeaGen tidal project, sited in the Tacoma Narrows, Washington This framework document used information available from permitting documents that were written to support actual wave or tidal energy projects, but the results obtained here should not be confused with those of the permitting documents1. The main difference between this framework document and permitting documents of currently proposed pilot projects is that this framework identifies key environmental concerns and describes the next steps in addressing those concerns; permitting documents must identify effects, find or declare thresholds of significance, evaluate the effects against the thresholds, and find mitigation measures that will minimize or avoid the effects so they can be considered less-than-significant. Two methodologies, 1) an environmental effects analysis and 2) Raptools, were developed and tested to identify potential environmental effects associated with wave or tidal energy conversion projects. For the environmental effects analysis, we developed a framework based on standard risk assessment techniques. The framework was applied to the three scenarios listed above. The environmental effects analysis addressed questions such as: ? What is the temporal and spatial exposure of a species at a site? ? What are the specific potential project effects on that species? ? What measures could minimize, mitigate, or eliminate negative effects? ? Are there potential effects of the project, or species’ response to the effect, that are highly uncertain and warrant additional study? The second methodology, Raptools, is a collaborative approach useful for evaluating multiple characteristi

  8. Scoping survey of perceived concerns, issues, and problems for near-surface disposal of FUSRAP waste

    SciTech Connect (OSTI)

    Robinson, J.E.; Gilbert, T.L.

    1982-12-01T23:59:59.000Z

    This report is a scoping summary of concerns, issues, and perceived problems for near-surface disposal of radioactive waste, based on a survey of the current literature. Near-surface disposal means land burial in or within 15 to 20 m of the earth's surface. It includes shallow land burial (burial in trenches, typically about 6 m deep with a 2-m cap and cover) and some intermediate-depth land burial (e.g., trenches and cap similar to shallow land burial, but placed below 10 to 15 m of clean soil). Proposed solutions to anticipated problems also are discussed. The purpose of the report is to provide a better basis for identifying and evaluating the environmental impacts and related factors that must be analyzed and compared in assessing candidate near-surface disposal sites for FUSRAP waste. FUSRAP wastes are of diverse types, and their classification for regulatory purposes is not yet fixed. Most of it may be characterized as low-activity bulk solid waste, and is similar to mill tailings, but with somewhat lower average specific activity. It may also qualify as Class A segregated waste under the proposed 10 CFR 61 rules, but the parent radionuclides of concern in FUSRAP (primarily U-238 and Th-232) have longer half-lives than do the radionuclides of concern in most low-level waste. Most of the references reviewed deal with low-level waste or mill tailings, since there is as yet very little literature in the public domain on FUSRAP per se.

  9. Industrial Hygiene Concerns during the Decontamination and Decommissioning of the Tokamak Fusion Test Reactor

    SciTech Connect (OSTI)

    M.E. Lumia; C.A. Gentile

    2002-01-18T23:59:59.000Z

    A significant industrial hygiene concern during the Decontamination and Decommissioning (D and D) of the Tokamak Fusion Test Reactor (TFTR) was the oxidation of the lead bricks' surface, which were utilized for radiation shielding. This presented both airborne exposure and surface contamination issues for the workers in the field removing this material. This paper will detail the various protection and control methods tested and implemented to protect the workers, including those technologies deployed to decontaminate the work surfaces. In addition, those techniques employed to recycle the lead for additional use at the site will be discussed.

  10. The Relationship Between Teachers' Stages of Concern about an Educational Innovation and Their Principals' Administrative Styles

    E-Print Network [OSTI]

    Yonally, Dawn

    1992-01-01T23:59:59.000Z

    List of Tables ix List of Figures x Chapter I. Introduction to the Problem 1 Problem 5 ^he Setting for This Study 5 Terms 8 II. Review of the Literature 15 Change in Education 15 Concerns-Based Adoption Model 19 Factors Affecting Change... in Education 2 5 Implementation 2 6 The Principals' Role 28 Change Facilitator Style 28 Facilitator Role in the Change Process 31 The Principal as Second Change Facilitator 34 Summary 3 7 III. Methodology 3 9 Introduction 3 9 Sample 3 9 Instruments...

  11. Habitat types on the Hanford Site: Wildlife and plant species of concern

    SciTech Connect (OSTI)

    Downs, J.L.; Rickard, W.H.; Brandt, C.A. [and others

    1993-12-01T23:59:59.000Z

    The objective of this report is to provide a comprehensive source of the best available information on Hanford Site sensitive and critical habitats and plants and animals of importance or special status. In this report, sensitive habitats include areas known to be used by threatened, endangered, or sensitive plant or animal species, wetlands, preserves and refuges, and other sensitive habitats outlined in the Hanford Site Baseline Risk Assessment Methodology. Potentially important species for risk assessment and species of special concern with regard to their status as threatened, endangered, or sensitive are described, and potential habitats for these species identified.

  12. Industrial Hygiene Concerns during the Decontamination and Decommissioning of the Tokamak Fusion Test Reactor

    E-Print Network [OSTI]

    Lumia, M E

    2002-01-01T23:59:59.000Z

    A significant industrial hygiene concern during the Decontamination and Decommissioning (D and D) of the Tokamak Fusion Test Reactor (TFTR) was the oxidation of the lead bricks' surface, which were utilized for radiation shielding. This presented both airborne exposure and surface contamination issues for the workers in the field removing this material. This paper will detail the various protection and control methods tested and implemented to protect the workers, including those technologies deployed to decontaminate the work surfaces. In addition, those techniques employed to recycle the lead for additional use at the site will be discussed.

  13. Docket-EO-05-01: Documents Concerning the 2005-2007 Emergency Reliability

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently20,000 Russian NuclearandJunetrack graphics4Dimitri Kusnezov - ChiefOrders Concerning

  14. Employee Concerns Program | U.S. DOE Office of Science (SC)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEAWater UseCElizabethTwo StatesEmployee Concerns Program

  15. Energy security is of particular concern in many Native American communities, de

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube|6721 FederalTexas Energyof 2005 at Iowasecurity is of particular concern in many

  16. Operating Experience Level 3, Safety Concern: Roll-up Doors | Department of

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO Overview OCHCO Overview OCHCO OCHCO OverviewFreedom ofDepartmentEnergy Safety Concern:

  17. Long Term Dynamics of Inequalities between French Households concerning Automobile COLLET, Roger; BOUCQ, Elise; MADRE, Jean-Loup; HIVERT, Laurent.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Long Term Dynamics of Inequalities between French Households concerning Automobile COLLET, Roger TERM DYNAMICS OF INEQUALITIES BETWEEN FRENCH HOUSEHOLDS CONCERNING AUTOMOBILE Roger Collet, INRETS of automobile. As the curves representing car ownership (number of cars per adult) and car use (annual mileage

  18. The gauge factor increase and the hypothetical emerging of the matter objects on the horizon in the standard model of universe

    E-Print Network [OSTI]

    V. Skalsky

    2000-09-25T23:59:59.000Z

    In the standard model of universe the increase in mass of our observed expansive and isotropic relativistic Universe is explained by the hypothetical assumption of matter objects emerging on the horizon (of the most remote visibility). However, the mathematical-physical analysis of the increase of Universe gauge factor shows that this hypothetical assumption is non-compatible with the variants of the standard model of universe by which - according to the standard model of universe - can be described the expansive evolution of the Universe.

  19. Origin of matter and space-time in the big bang

    SciTech Connect (OSTI)

    Mathews, G. J. [University of Notre Dame, Center for Astrophysics/JINA, Notre Dame, IN 46556, USA and Division of Theoretical Astronomy, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan); Kajino, T. [Division of Theoretical Astronomy, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan and Department of Astronomy, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); Yamazaki, D. [Division of Theoretical Astronomy, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan); Kusakabe, M. [School of Liberal Arts and Science, Korea Aerospace University, Goyang 412-791, Korea and Department of Physics, Soongsil University, Seoul 156-743 (Korea, Republic of); Cheoun, M.-K. [Department of Physics, Soongsil University, Seoul 156-743 (Korea, Republic of)

    2014-05-02T23:59:59.000Z

    We review the case for and against a bulk cosmic motion resulting from the quantum entanglement of our universe with the multiverse beyond our horizon. Within the current theory for the selection of the initial state of the universe from the landscape multiverse there is a generic prediction that pre-inflation quantum entanglement with other universes should give rise to a cosmic bulk flow with a correlation length of order horizon size and a velocity field relative to the expansion frame of the universe. Indeed, the parameters of this motion are are tightly constrained. A robust prediction can be deduced indicating that there should be an overall motion of of about 800 km/s relative to the background space time as defined by the cosmic microwave background (CMB). This talk will summarize the underlying theoretical motivation for this hypothesis. Of course our motion relative to the background space time (CMB dipole) has been known for decades and is generally attributed to the gravitational pull of the local super cluster. However, this cosmic peculiar velocity field has been recently deduced out to very large distances well beyond that of the local super cluster by using X-ray galaxy clusters as tracers of matter motion. This is achieved via the kinematic component of the Sunyaev-Zeldovich (KSZ) effect produced by Compton scattering of cosmic microwave background photons from the local hot intracluster gas. As such, this method measures peculiar velocity directly in the frame of the cluster. Similar attempts by our group and others have attempted to independently assess this bulk flow via Type la supernova redshifts. In this talk we will review the observation case for and against the existence of this bulk flow based upon the observations and predictions of the theory. If this interpretation is correct it has profound implications in that we may be observing for the first time both the physics that occurred before the big bang and the existence of the multiverse beyond our horizon.

  20. Gravitational wave signatures of the absence of an event horizon. II. Extreme mass ratio inspirals in the spacetime of a thin-shell gravastar

    SciTech Connect (OSTI)

    Pani, Paolo [Dipartimento di Fisica, Universita di Cagliari, and INFN sezione di Cagliari, Cittadella Universitaria 09042 Monserrato (Italy); Berti, Emanuele [Department of Physics and Astronomy, University of Mississippi, University, Mississippi 38677-1848 (United States); Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States); Cardoso, Vitor [Department of Physics and Astronomy, University of Mississippi, University, Mississippi 38677-1848 (United States); Centro Multidisciplinar de Astrofisica-CENTRA, Department de Fisica, Instituto Superior Tecnico, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal); Chen Yanbei; Norte, Richard [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)

    2010-04-15T23:59:59.000Z

    We study gravitational wave emission from the quasicircular, extreme mass ratio inspiral of compact objects of mass m{sub 0} into massive objects of mass M>>m{sub 0} whose external metric is identical to the Schwarzschild metric, except for the absence of an event horizon. To be specific we consider one of the simplest realizations of such an object: a nonrotating thin-shell gravastar. The power radiated in gravitational waves during the inspiral shows distinctive peaks corresponding to the excitation of the polar oscillation modes of the gravastar. For ultracompact gravastars the frequency of these peaks depends mildly on the gravastar compactness. For masses M{approx}10{sup 6}M{sub {center_dot}}the peaks typically lie within the optimal sensitivity bandwidth of the Laser Interferometer Space Antenna, potentially providing a unique signature of the horizonless nature of the central object. For relatively modest values of the gravastar compactness the radiated power has even more peculiar features, carrying the signature of the microscopic properties of the physical surface replacing the event horizon.

  1. Greenhouse Gas Concerns and Power Sector Planning (released in AEO2009)

    Reports and Publications (EIA)

    2009-01-01T23:59:59.000Z

    Concerns about potential climate change driven by rising atmospheric concentrations of Greenhouse Gases (GHG) have grown over the past two decades, both domestically and abroad. In the United States, potential policies to limit or reduce GHG emissions are in various stages of development at the state, regional, and federal levels. In addition to ongoing uncertainty with respect to future growth in energy demand and the costs of fuel, labor, and new plant construction, U.S. electric power companies must consider the effects of potential policy changes to limit or reduce GHG emissions that would significantly alter their planning and operating decisions. The possibility of such changes may already be affecting planning decisions for new generating capacity.

  2. Aviation safety. Serious problems concerning the Air Traffic Control work force

    SciTech Connect (OSTI)

    Not Available

    1986-03-01T23:59:59.000Z

    This report provides the results of an extensive study of the air traffic control work force and includes conclusions and recommendations. The report shows that the Federal Aviation Administration (FAA) has not met its goals for fully qualified (FPL) controllers at many major facilities, and that the growth in air traffic activity as caused controller work load to reach a point where controllers are stretched too thin. Controllers and their supervisors have expressed serious concerns about their ability to continue to maintain the proper margin of safety. We recommend that FAA impose restrictions on air traffic until both the number of FPL controllers and overtime requirements meet FAA's goals. Problems relating to both the number of FPLs and overtime are most acute at the air route traffic control centers and FAA must recognize this in deciding what restrictions to impose.

  3. Crucial tests of the existence of a Time Operator

    E-Print Network [OSTI]

    Thomas Durt

    2010-03-14T23:59:59.000Z

    In the present paper we show that the Temporal Wave Function approach of the decay process, which is a multicomponent version of the Time Operator approach leads to new, non-standard, predictions concerning the statistical properties of decay time distributions of single kaons and entangled pairs of mesons. These results suggest crucial experimental tests for the existence of a Time Operator for the decay process to be realized in High Energy Physics or Quantum Optics.

  4. The relationship of travel agents and consumer travel magazines concerning the travel destinations of tourists using travel agencies

    E-Print Network [OSTI]

    Tomlinson, Beverly

    2013-02-22T23:59:59.000Z

    THE RELATIONSHIP OF TRAVEL AGENTS AND CONSUMER TRAVEL MA GAZINES CONCERNING THE TRAVEL DES TINA TIONS OF TOURISTS USING TRAVEL AGENCIES A Senior Thesis By Beverly Tomlinson 1997-98 University Undergraduate Research Fellow Texas A&M University...

  5. Regulations concerning the dr.philos. degree at the Norwegian University of Science and Technology (NTNU) 1

    E-Print Network [OSTI]

    Malinnikova, Eugenia

    Regulations concerning the dr.philos. degree at the Norwegian University of Science and Technology citizen, nor a citizen of any of the Nordic countries, may apply for admission to the dr

  6. Federal Register Notice for Addendum to Environmental Review Documents Concerning Exports of Natural Gas from the United States

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy (FE) of the Department of Energy (DOE) announces the availability of the Addendum To Environmental Review Documents Concerning Exports Of Natural Gas From The United...

  7. A comparison of the attitudes of Texas high school superintendents and athletic personnel regarding selected athletic concerns

    E-Print Network [OSTI]

    Yawn, Patricia Fullagar

    1986-01-01T23:59:59.000Z

    A COMPARISON OF THE ATTITUDES OF TEXAS HIGH SCHOOL SUPERINTENDENTS AND ATHLETIC PERSONNEL REGARDING SELECTED ATHLETIC CONCERNS A Thesis by PATRICIA FULLAGAR YAWN Submitted to the Graduate College of Texas A&M University in partial... fulfillment of the requirements for the degree- of MASTER OF SCIENCE December 1986 Major Subject: Physical Education A COMPARISON OF THE ATTITUDES OF TEXAS HIGH SCHOOL SUPERINTENDENTS AND ATHLETIC PERSONNEL REGARDING SELECTED ATHLETIC CONCERNS A Thesis...

  8. The roles of selected extracommunity organizations in the decision-making process: a comparison of three communities concerning dam construction.

    E-Print Network [OSTI]

    Richardson, Sue

    1975-01-01T23:59:59.000Z

    THE ROLES OF SELECTED EXTRACOMMUNITY ORGANIZATIONS IN THE DECISION-MAKING PROCESS: A COMPARISON OF THREE COMMUNITIES CONCERNING DAM CONSTRUCTION A Thesis SUE ELLEN RICHARDSON Submitted to the Graduate College of Texas A&M University... in Partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1975 Major Subject: Sociology THE ROLES OF SELECTED EXTRACOMMUNITY ORGANIZATIONS IN THE DECISION-t1AKING PROCESS A COMPARISON OF THREE COMMUNITIES CONCERNING DAM COI...

  9. A smartphone interface for a wireless EEG headset with real-time 3D reconstruction

    E-Print Network [OSTI]

    and 3D reconstruction. Introduction Functional brain imaging techniques including fMRI and PET provide gestures (see Fig. 1). Evaluation A major concern in mobile real-time systems is the power consumption

  10. Quantum time uncertainty in Schwarzschild-anti-de Sitter black holes

    SciTech Connect (OSTI)

    Galan, Pablo; Mena Marugan, Guillermo A. [Instituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid (Spain); Garay, Luis J. [Departamento de Fisica Teorica II, Universidad Complutense de Madrid, 28040 Madrid (Spain); Instituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid (Spain)

    2007-08-15T23:59:59.000Z

    The combined action of gravity and quantum mechanics gives rise to a minimum time uncertainty in the lowest order approximation of a perturbative scheme, in which quantum effects are regarded as corrections to the classical spacetime geometry. From the nonperturbative point of view, both gravity and quantum mechanics are treated on equal footing in a description that already contains all possible backreaction effects as those above in a nonlinear manner. In this paper, the existence or not of such minimum time uncertainty is analyzed in the context of Schwarzschild-anti-de Sitter black holes using the isolated horizon formalism. We show that from a perturbative point of view, a nonzero time uncertainty is generically present owing to the energy scale introduced by the cosmological constant, while in a quantization scheme that includes nonperturbatively the effects of that scale, an arbitrarily high time resolution can be reached.

  11. Duke University GS 311-01 "Ethical Concerns in the Peer Review Process"

    E-Print Network [OSTI]

    Ferrari, Silvia

    , 2007 2:00-4:00pm Location: Nanaline Duke Building, Room 147 NOTE: For PhD students in Basic Med" Speaker: David Resnik, JD, PhD; Bioethicist, NIEHS (RTP, NC) Date/Time: Oct 4, 2007 3:00-5:00pm Location/Time: Oct. 30, 2007 2:30-4:30pm Location: Searle Center Lecture Hall NOTE: For PhD students in basic med

  12. Gas generation from low-level radioactive waste: Concerns for disposal

    SciTech Connect (OSTI)

    Siskind, B.

    1992-01-01T23:59:59.000Z

    The Advisory Committee on Nuclear Waste (ACNW) has urged the Nuclear Regulatory Commission (NRC) to reexamine the topic of hydrogen gas generation from low-level radioactive waste (LLW) in closed spaces to ensure that the slow buildup of hydrogen from water-bearing wastes in sealed containers does not become a problem for long-term safe disposal. Brookhaven National Laboratory (BNL) has prepared a report, summarized in this paper, for the NRC to respond to these concerns. The paper discusses the range of values for G(H{sub 2}) reported for materials of relevance to LLW disposal; most of these values are in the range of 0.1 to 0.6. Most studies of radiolytic hydrogen generation indicate a leveling off of pressurization, probably because of chemical kinetics involving, in many cases, the radiolysis of water within the waste. Even if no leveling off occurs, realistic gas leakage rates (indicating poor closure by gaskets on drums and liners) will result in adequate relief of pressure for radiolytic gas generation from the majority of commercial sector LLW packages. Biodegradative gas generation, however, could pose a pressurization hazard even at realistic gas leakage rates. Recommendations include passive vents on LLW containers (as already specified for high integrity containers) and upper limits to the G values and/or the specific activity of the LLW.

  13. Gas generation from low-level radioactive waste: Concerns for disposal

    SciTech Connect (OSTI)

    Siskind, B.

    1992-04-01T23:59:59.000Z

    The Advisory Committee on Nuclear Waste (ACNW) has urged the Nuclear Regulatory Commission (NRC) to reexamine the topic of hydrogen gas generation from low-level radioactive waste (LLW) in closed spaces to ensure that the slow buildup of hydrogen from water-bearing wastes in sealed containers does not become a problem for long-term safe disposal. Brookhaven National Laboratory (BNL) has prepared a report, summarized in this paper, for the NRC to respond to these concerns. The paper discusses the range of values for G(H{sub 2}) reported for materials of relevance to LLW disposal; most of these values are in the range of 0.1 to 0.6. Most studies of radiolytic hydrogen generation indicate a leveling off of pressurization, probably because of chemical kinetics involving, in many cases, the radiolysis of water within the waste. Even if no leveling off occurs, realistic gas leakage rates (indicating poor closure by gaskets on drums and liners) will result in adequate relief of pressure for radiolytic gas generation from the majority of commercial sector LLW packages. Biodegradative gas generation, however, could pose a pressurization hazard even at realistic gas leakage rates. Recommendations include passive vents on LLW containers (as already specified for high integrity containers) and upper limits to the G values and/or the specific activity of the LLW.

  14. Summary proceedings of a workshop on Bioremediation and its Societal Implications and Concerns (BASIC)

    SciTech Connect (OSTI)

    Drell, D.W. [Department of Energy, Germantown, MD (United States). Office of Health and Environmental Research, Health Effects and Life Sciences Research Division; Metting, F.B. Jr. [Pacific Northwest National Lab., Richland, WA (United States); Wuy, L.D. [ed.] [Lawrence Berkeley National Lab., CA (United States)

    1996-11-01T23:59:59.000Z

    This document summarizes the proceedings of a workshop on Bioremediation and Its Societal Implications and Concerns (BASIC) held July 18-19, 1996 at the Airlie Center near Warrenton, Virginia. The workshop was sponsored by the Office of Health and Environmental Research (OHER), U.S. Department of Energy (DOE), as part of its fundamental research program in Natural and Accelerated Bioremediation Research (NABIR). The information summarized in these proceedings represents the general conclusions of the workshop participants, and not the opinions of workshop organizers or sponsors. Neither are they consensus opinions, as opinions differed among participants on a number of points. The general conclusions presented below were reached through a review, synthesis, and condensation of notes taken by NABIR Program Office staff and OHER program managers throughout the workshop. Specific contributions by participants during breakout sessions are recorded in bullet form in the appropriate sections, without attribution to the contributors. These contributions were transcribed as faithfully as possible from notes about the original discussions. They were edited only to make them grammatically correct, parallel in structure, and understandable to someone not familiar with the NABIR Program or BASIC element.

  15. Water use and supply concerns for utility-scale solar projects in the Southwestern United States.

    SciTech Connect (OSTI)

    Klise, Geoffrey Taylor; Tidwell, Vincent Carroll; Reno, Marissa Devan; Moreland, Barbara D.; Zemlick, Katie M.; Macknick, Jordan [National Renewable Energy Laboratory Golden, CO] [National Renewable Energy Laboratory Golden, CO

    2013-07-01T23:59:59.000Z

    As large utility-scale solar photovoltaic (PV) and concentrating solar power (CSP) facilities are currently being built and planned for locations in the U.S. with the greatest solar resource potential, an understanding of water use for construction and operations is needed as siting tends to target locations with low natural rainfall and where most existing freshwater is already appropriated. Using methods outlined by the Bureau of Land Management (BLM) to determine water used in designated solar energy zones (SEZs) for construction and operations & maintenance, an estimate of water used over the lifetime at the solar power plant is determined and applied to each watershed in six Southwestern states. Results indicate that that PV systems overall use little water, though construction usage is high compared to O&M water use over the lifetime of the facility. Also noted is a transition being made from wet cooled to dry cooled CSP facilities that will significantly reduce operational water use at these facilities. Using these water use factors, estimates of future water demand for current and planned solar development was made. In efforts to determine where water could be a limiting factor in solar energy development, water availability, cost, and projected future competing demands were mapped for the six Southwestern states. Ten watersheds, 9 in California, and one in New Mexico were identified as being of particular concern because of limited water availability.

  16. K-effective of the world: and other concerns for Monte Carlo Eigenvalue calculations

    SciTech Connect (OSTI)

    Brown, Forrest B [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Monte Carlo methods have been used to compute k{sub eff} and the fundamental model eigenfunction of critical systems since the 1950s. Despite the sophistication of today's Monte Carlo codes for representing realistic geometry and physics interactions, correct results can be obtained in criticality problems only if users pay attention to source convergence in the Monte Carlo iterations and to running a sufficient number of neutron histories to adequately sample all significant regions of the problem. Recommended best practices for criticality calculations are reviewed and applied to several practical problems for nuclear reactors and criticality safety, including the 'K-effective of the World' problem. Numerical results illustrate the concerns about convergence and bias. The general conclusion is that with today's high-performance computers, improved understanding of the theory, new tools for diagnosing convergence (e.g., Shannon entropy of the fission distribution), and clear practical guidance for performing calculations, practitioners will have a greater degree of confidence than ever of obtaining correct results for Monte Carlo criticality calculations.

  17. Large time behaviour of mild solutions of Hamilton-Jacobi-Bellman equations in infinite dimension

    E-Print Network [OSTI]

    Boyer, Edmond

    Large time behaviour of mild solutions of Hamilton-Jacobi-Bellman equations in infinite dimension by a probabilistic approach Ying Hu Pierre-Yves Madec Adrien Richou June 22, 2014 Abstract We study the large time We are concerned with the large time behaviour of solutions of the Cauchy problem in an infinite

  18. Competitive Non-migratory Scheduling for Flow Time and Energy

    E-Print Network [OSTI]

    Wong, Prudence W.H.

    @liv.ac.uk ABSTRACT Energy usage has been an important concern in recent re- search on online scheduling technology to reduce energy usage is dynamic speed scaling (see, e.g., [9, 15, 24, 28]) where the processorCompetitive Non-migratory Scheduling for Flow Time and Energy Tak-Wah Lam Department of Computer

  19. Competitive Nonmigratory Scheduling for Flow Time and Energy

    E-Print Network [OSTI]

    Lam, Tak-Wah

    @liv.ac.uk ABSTRACT Energy usage has been an important concern in recent re­ search on online scheduling technology to reduce energy usage is dynamic speed scaling (see, e.g., [9, 15, 24, 28]) where the processorCompetitive Non­migratory Scheduling for Flow Time and Energy Tak­Wah Lam Department of Computer

  20. Improved Multi-processor Scheduling for Flow Time and Energy

    E-Print Network [OSTI]

    Wong, Prudence W.H.

    . To Prudence W. H. Wong October 29, 2009 Abstract Energy usage has been an important concern in recent research energy usage is dynamic speed scaling (see, e.g., [8, 14, 24, 28]) where the processor can vary its speedImproved Multi-processor Scheduling for Flow Time and Energy Tak-Wah Lam Lap-Kei Lee Isaac K. K

  1. Real time sensors in geothermal fluids: their costs and benefits

    SciTech Connect (OSTI)

    Jensen, G.A.; Shannon, D.W.; Hazelton, R.F.

    1982-02-01T23:59:59.000Z

    A summary of the PNL effort, a background discussion on geothermal power plants, and a discussion of several cases where problems were identified and in some cases prevented are included. Cost factors, savings, and benefits-costs to the sponsor are summarized and brief conclusions concerning the benefits of having real time instrumentation installed in the power plant are characterized.

  2. SLH Timing Belt Powertrain

    SciTech Connect (OSTI)

    Schneider, Abe

    2014-04-09T23:59:59.000Z

    The main goal of this proposal was to develop and test a novel powertrain solution for the SLH hydroEngine?, a low-cost, efficient low-head hydropower technology. Nearly two-thirds of U.S. renewable electricity is produced by hydropower (EIA 2010). According to the U.S. Department of Energy; this amount could be increased by 50% with small hydropower plants, often using already-existing dams (Hall 2004). There are more than 80,000 existing dams, and of these, less than 4% generate power (Blankinship 2009). In addition, there are over 800 irrigation districts in the U.S., many with multiple, non-power, low-head drops. These existing, non-power dams and irrigation drops could be retrofitted to produce distributed, baseload, renewable energy with appropriate technology. The problem is that most existing dams are low-head, or less than 30 feet in height (Ragon 2009). Only about 2% of the available low-head hydropower resource in the U.S. has been developed, leaving more than 70 GW of annual mean potential low-head capacity untapped (Hall 2004). Natel Energy, Inc. is developing a low-head hydropower turbine that operates efficiently at heads less than 6 meters and is cost-effective for deployment across multiple low-head structures. Because of the unique racetrack-like path taken by the prime-movers in the SLH, a flexible powertrain is required. Historically, the only viable technological solution was roller chain. Despite the having the ability to easily attach blades, roller chain is characterized by significant drawbacks, including high cost, wear, and vibration from chordal action. Advanced carbon-#12;fiber-reinforced timing belts have been recently developed which, coupled with a novel belt attachment system developed by Natel Energy, result in a large reduction in moving parts, reduced mass and cost, and elimination of chordal action for increased fatigue life. The work done in this project affirmatively addressed each of the following 3 major uncertainties concerning a timing-belt based hydroEngine ?powertrain: 1. Can a belt handle the high torques and power loads demanded by the SLH? (Yes.) 2. Can the SLH blades be mounted to belt with a connection that can withstand the loads encountered in operation? (Yes.) 3. Can the belt, with blade attachments, live through the required cyclic loading? (Yes.) The research adds to the general understanding of sustainable small hydropower systems by using innovative system testing to develop and demonstrate performance of a novel powertrain solution, enabling a new type of hydroelectric turbine to be commercially developed. The technical effectiveness of the methods investigated has been shown to be positive through an extensive design and testing process accommodating many constraints and goals, with a major emphasis on high cycle fatigue life. Economic feasibility of the innovations has been demonstrated through many iterations of design for manufacturability and cost reduction. The project is of benefit to the public because it has helped to develop a solution to a major problem -- despite the large available potential for new low-head hydropower, high capital costs and high levelized cost of electricity (LCOE) continue to be major barriers to project development. The hydroEngine? represents a significant innovation, leveraging novel fluid mechanics and mechanical configuration to allow lower-cost turbine manufacture and development of low head hydropower resources.

  3. Annual Graduate Student Symposium Schedule Time Presenter Title

    E-Print Network [OSTI]

    Meyers, Steven D.

    of the Mississippi River Diversions During the Deepwater Horizon Oil Spill 10:1510:30 am Rebekka Larson Shifts Petroleum Dispersal and Partitioning After the Deepwater Horizon Blowout 99:15 am Robert Ulrich Grouper in Depositional Patterns in the NE Gulf of Mexico Following the 2010 BP Blowout Event: Stratigraphy

  4. The Cold War Court: a rhetorical analysis of the Supreme Court's debate concerning the American Communist Party in Dennis v. United States, 1951

    E-Print Network [OSTI]

    Carcasson, Martin

    1998-01-01T23:59:59.000Z

    concerning the judicial rhetoric, the anti-communism debate, and the role of the Supreme Court in the American democracy....

  5. Time Scales in Probabilistic Models of Wireless Sensor Networks

    E-Print Network [OSTI]

    Anatoly Manita

    2013-02-28T23:59:59.000Z

    We consider a stochastic model of clock synchronization in a wireless network consisting of N sensors interacting with one dedicated accurate time server. For large N we find an estimate of the final time sychronization error for global and relative synchronization. Main results concern a behavior of the network on different time scales $t=t_N \\to \\infty$, $N \\to \\infty$. We discuss existence of phase transitions and find exact time scales on which an effective clock synchronization of the system takes place.

  6. Wind Power Answer In Times of Water Scarcity (Presentation)

    SciTech Connect (OSTI)

    Flowers, L.; Reategui, S.

    2010-05-25T23:59:59.000Z

    Strategic energy planning is paramount during times of dramatic population growth, global warming, increasing energy demands, and concerns over energy security, food security, and economic development. Recent concerns over water scarcity have moved the energy-water issue to the forefront of energy options discussions. This presentation describes the current water challenges in the United States and presents a case for wind energy as one way to mitigate the problem of water scarcity in several U.S. regions while providing a clean and sustainable economic future for America.

  7. Conformity as a function of experimenter status, public vs private responses, and instructions concerning group ability

    E-Print Network [OSTI]

    May, Martha Ann

    1974-01-01T23:59:59.000Z

    (see Table 1). An analysis of variance was run on the number of times Ss conformed on four critical trials. 21 TABLE I EXPERIMENTA L GROUPS GROUP STATUS OF E PUBLIC OR PRIVATE INSTRUCTIONS High Pub li c Superior High Public Inferior High Private... the true ratings done by the Ss were replaced by fake ratings prepared in advance by the E. The results showed two contrasting patterns of conformity believed to be caused by the different conditions of acceptance. In the "accepted" group, there was a...

  8. A critical concern for embedded sys-tems is the need to deliver high levels of per-

    E-Print Network [OSTI]

    Mudge, Trevor

    10 A critical concern for embedded sys- tems is the need to deliver high levels of per- formance proces- sor utilization and allows a corresponding reduction in supply voltage. Because dynam- ic energy scales quadratically with supply volt- age, DVS can significantly reduce energy use.2 Enabling systems

  9. Report concerning the Ph.D. Thesis "Embodiment and a-didactical situation in the teaching-learning of the

    E-Print Network [OSTI]

    Spagnolo, Filippo

    Report concerning the Ph.D. Thesis "Embodiment and a-didactical situation in the teaching the processes of learning by given pupils in a concrete didactic situation. The second, that instead doesn-knowledge-pupil to ex- amine particularly the dynamic of an a-didactical situation. So she resume the main obstacles

  10. Vulnerability and Resilience of the Territory Concerning Risk of Dangerous Goods Transportation (DGT): Proposal of a Spatial

    E-Print Network [OSTI]

    Boyer, Edmond

    Vulnerability and Resilience of the Territory Concerning Risk of Dangerous Goods Transportation.garbolino@mines-paristech.fr Each year millions of tons of Dangerous Goods are transported between France and Italy using especially for the territory Dangerous Goods Transportation (DGT) is a crucial activity that participates to the development

  11. ASHRAE/NIST Refrigerants Conference International concerns about the impact of refrigerants on climate change drive the

    E-Print Network [OSTI]

    Ginzel, Matthew

    ASHRAE/NIST Refrigerants Conference International concerns about the impact of refrigerants on climate change drive the need to look at new cooling and refrigeration options that are sustainable" refrigerants through papers, presentations and panel discussions. This is the fourth jointly sponsored

  12. Instructions concerning the strdent's representative The faculty of law at Philadelphia University gives a high degree of interest to

    E-Print Network [OSTI]

    Instructions concerning the strdent's representative-learning process being run perfectly,it was decided that a student should be chosen to represent all students in a class to words the teacher of the course . 2- The aim of choosing a representative . This procedure aims

  13. FUNDING OPPORTUNITIES IN LOCAL FOODS As local food systems continue to develop, a primary concern for stakeholders is access to

    E-Print Network [OSTI]

    Debinski, Diane M.

    and education center at Iowa State University to develop sustainable agricultural practices that are both concern for stakeholders is access to capital. The good news is, there are funding options available from Initiative, Leopold Center for Sustainable Agriculture, in collaboration with Iowa State University

  14. Share this: 5 Facebook StumbleUpon Email Report: Concerning levels of toxins found in sport fish along San Diego

    E-Print Network [OSTI]

    in several local species of sport fish, including various bass, perch, rockfish and shark, the UnionShare this: 5 Facebook StumbleUpon Email Report: Concerning levels of toxins found in sport fish along San Diego coastline By City News Service, on August 15, 2011, at 9:08 am Sport fish found along

  15. Abstract--Multi area power systems work most often with a poor inter-regional coordination about reactive power concerns.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Abstract--Multi area power systems work most often with a poor inter-regional coordination about reactive power concerns. Transmission system operators typically do not possess a detailed knowledge about voltage profile across interconnected power systems. In this context, reactive power scheduling may

  16. AgriculturAl lAnd ApplicAtion of Biosolids in VirginiA: risks And concerns

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    in VirginiA: risks And concerns G.K. Evanylo, ExtEnsion spEcialist, DEpartmEnt of crop anD soil EnvironmEntal and organic matter for improving soil tilth, water-holding capacity, soil aeration, and an energy source. Transportation and application scheduling that is compatible with agricultural planting, harvesting, and possible

  17. Note and calculations concerning elastic dilatancy in 2D glassglass liquid foams Francois Molino, Pierre Rognon, and Cyprien Gay #

    E-Print Network [OSTI]

    Recanati, Catherine

    Note and calculations concerning elastic dilatancy in 2D glass­glass liquid foams Fran�cois Molino: October 30, 2010) When deformed, liquid foams tend to raise their liquid contents like immersed granular dilatancy in 3D foams and in very dry foams squeezed between two solid plates (2D GG foams). Here, we

  18. Characterization of wastewater subsurface drip emitters and design approaches concerning system application uniformity

    E-Print Network [OSTI]

    Duan, Xiaojing

    2009-06-02T23:59:59.000Z

    Bioline 08WRAM 0.6-24V PC 14.5 mm (0.57 inch) 0.61 m (2 feet) 2.27 liter/hr@137.9 Kpa (0.6 GPH@20 psi) 48.3-413.7 Kpa (7-60 psi) 5 Netafim Bioline 08WRAM 1.0- 12500 PC 14.5 mm (0.57 inch) 0.305 m (1 foot) 3.79 liter/hr@137.9 Kpa (1... of the operating pressure. 16 Sampling Protocol Sampling Time In this study, a sampling event was conducted by connecting 10 individual 3.05 m lengths of tubing to the testing apparatus. Each lateral had six emitters. This allowed a grouping...

  19. Developmental time windows for axon growth influence neuronal network topology

    E-Print Network [OSTI]

    Lim, Sol

    2015-01-01T23:59:59.000Z

    Early brain connectivity development consists of multiple stages: birth of neurons, their migration and the subsequent growth of axons and dendrites. Each stage occurs within a certain period of time depending on types of neurons and cortical layers. Forming synapses between neurons either by growing axons starting at similar times for all neurons (much-overlapped time windows) or at different time points (less-overlapped) may affect the topological and spatial properties of neuronal networks. Here, we explore the extreme cases of axon formation especially concerning short-distance connectivity during early development, either starting at the same time for all neurons (parallel, i.e. maximally-overlapped time windows) or occurring for each neuron separately one neuron after another (serial, i.e. no overlaps in time windows). For both cases, the number of potential and established synapses remained comparable. Topological and spatial properties, however, differed: neurons that started axon growth early on in s...

  20. Cosmological entropy production and viscous processes in the (1+3+6)-dimensional space-times

    E-Print Network [OSTI]

    Kenji Tomita

    2014-05-23T23:59:59.000Z

    The cosmological entropy production is studied in the (1+3+6)-dimensional space-times consisting of the outer space (the 3-dimensional expanding section) and the inner space (the 6-dimensional section). The inner space expands initially and contracts later. First it is shown how the production of the 3-dimensional entropy S_3 within the horizon is strengthened by the dissipation due to viscous processes between the two spaces, in which we consider the viscosity caused by the gravitational-wave transport. Next it is shown under what conditions we can have the critical epoch when S_3 reaches the value 10^{88} in the Guth level and at the same time the outer space is decoupled from the inner space. Moreover, the total entropy S_9 in the 9-dimensional space at the primeval expanding stage is also shown corresponding to S_3.

  1. Lightweight Time Modeling in Timed Creol

    E-Print Network [OSTI]

    Bjørk, Joakim; Owe, Olaf; Schlatte, Rudolf; 10.4204/EPTCS.36.4

    2010-01-01T23:59:59.000Z

    Creol is an object-oriented modeling language in which inherently concurrent objects exchange asynchronous method calls. The operational semantics of Creol is written in an actor-based style, formulated in rewriting logic. The operational semantics yields a language interpreter in the Maude system, which can be used to analyze models. Recently, Creol has been applied to the modeling of systems with radio communication, such as sensor systems. With radio communication, messages expire and, if sent simultaneously, they may collide in the air. In order to capture these and other properties of distributed systems, we extended Creol's operational semantics with a notion of time. We exploit the framework of a language interpreter to use a lightweight notion of time, in contrast to that needed for a general purpose specification language. This paper presents a timed extension of Creol, including the semantics and the implementation strategy, and discusses its properties using an extended example. The approach can be...

  2. Real time search on the web: Queries, topics, and economic value Bernard J. Jansen a,

    E-Print Network [OSTI]

    Jansen, James

    examine aggregate usage of the search engine, including number of users, queries, and terms. We term interest in a topic and the polling nature of real time queries. Concerning search topics geographical affinity, pointing to a location-based aspect to real time search. In terms of economic value, we

  3. Noncommutative Two Time Physics

    E-Print Network [OSTI]

    W. Chagas-Filho

    2006-05-10T23:59:59.000Z

    We present a classical formalism describing two-time physics with Abelian canonical gauge field backgrounds. The formalism can be used as a starting point for the construction of an interacting quantized two-time physics theory in a noncommutative soace-time.

  4. Quantum Operation Time Reversal

    SciTech Connect (OSTI)

    Crooks, Gavin E.

    2008-03-25T23:59:59.000Z

    The dynamics of an open quantum system can be described by a quantum operation: A linear, complete positive map of operators. Here, I exhibit a compact expression for the time reversal of a quantum operation, which is closely analogous to the time reversal of a classical Markov transition matrix. Since open quantum dynamics are stochastic, and not, in general, deterministic, the time reversal is not, in general, an inversion of the dynamics. Rather, the system relaxes toward equilibrium in both the forward and reverse time directions. The probability of a quantum trajectory and the conjugate, time reversed trajectory are related by the heat exchanged with the environment.

  5. Information Concerning the Contract for the Heating and Ventilation Installations for the Auxiliary Buildings of the 300 GeV Accelerator

    E-Print Network [OSTI]

    1974-01-01T23:59:59.000Z

    Information Concerning the Contract for the Heating and Ventilation Installations for the Auxiliary Buildings of the 300 GeV Accelerator

  6. Real estate investment in Cuba : is now the right time?

    E-Print Network [OSTI]

    Chaviano, Damien Bronsdon

    2008-01-01T23:59:59.000Z

    On the eve of the fifty-year anniversary of the Cuban Revolution, change finally appears to be on the horizon for Cuba. In February 2008, Raul Castro succeeded his older brother Fidel as President of the Republic of Cuba. ...

  7. Matter: Space without Time

    E-Print Network [OSTI]

    Yousef Ghazi-Tabatabai

    2012-11-19T23:59:59.000Z

    While Quantum Gravity remains elusive and Quantum Field Theory retains the interpretational difficulties of Quantum Mechanics, we have introduced an alternate approach to the unification of particles, fields, space and time, suggesting that the concept of matter as space without time provides a framework which unifies matter with spacetime and in which we anticipate the development of complete theories (ideally a single unified theory) describing observed 'particles, charges, fields and forces' solely with the geometry of our matter-space-time universe.

  8. Manage Your Time 

    E-Print Network [OSTI]

    White, Lynn

    2000-06-27T23:59:59.000Z

    , you expect unused time to come around again, so that when the same opportunities appear you will be wiser about how to use it. Consider how your cultural background af_fects the w ay you plan and manage time. W *Both cited in Bauer, J. It?s Time.... Effective time management means decid- ing which activity should be done from all the possibilities available, and then doing it. It is a matter of setting priorities. Deciding which jobs are most important and working on those may be better than doing less...

  9. Intrinsic Time Quantum Geometrodynamics

    E-Print Network [OSTI]

    Eyo Eyo Ita III; Chopin Soo; Hoi-Lai Yu

    2015-02-06T23:59:59.000Z

    Quantum Geometrodynamics with intrinsic time development and momentric variables is presented. An underlying SU(3) group structure at each spatial point regulates the theory. The intrinsic time behavior of the theory is analyzed, together with its ground state and primordial quantum fluctuations. Cotton-York potential dominates at early times when the universe was small; the ground state naturally resolves Penrose's Weyl Curvature Hypothesis, and thermodynamic and gravitational `arrows of time' point in the same direction. Ricci scalar potential corresponding to Einstein's General Relativity emerges as a zero-point energy contribution. A new set of fundamental commutation relations without Planck's constant emerges from the unification of Gravitation and Quantum Mechanics.

  10. Intrinsic Time Quantum Geometrodynamics

    E-Print Network [OSTI]

    Ita, Eyo Eyo; Yu, Hoi-Lai

    2015-01-01T23:59:59.000Z

    Quantum Geometrodynamics with intrinsic time development and momentric variables is presented. An underlying SU(3) group structure at each spatial point regulates the theory. The intrinsic time behavior of the theory is analyzed, together with its ground state and primordial quantum fluctuations. Cotton-York potential dominates at early times when the universe was small; the ground state naturally resolves Penrose's Weyl Curvature Hypothesis, and thermodynamic and gravitational `arrows of time' point in the same direction. Ricci scalar potential corresponding to Einstein's General Relativity emerges as a zero-point energy contribution. A new set of fundamental canonical commutation relations without Planck's constant emerges from the unification of Gravitation and Quantum Mechanics.

  11. Technology on the Horizon & Over the Horizon

    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,1Stocks Nov-14Total DeliveredPrincipalNumber of Water8 WaterDonald

  12. Developing Improved Travel Time Reliability Measures For Real-time

    E-Print Network [OSTI]

    Bertini, Robert L.

    reliability Use for prioritizing improvements Outline #12; 95th Percentile Travel Time Travel Time Index: mean travel time divided by free flow travel time Buffer Index: difference between 95th percentile travel time and mean travel time, divided by mean travel time Planning Time Index: 95th percentile

  13. 1MaPhySto Workshop 9/04 Nonlinear Time Series ModelingNonlinear Time Series Modeling

    E-Print Network [OSTI]

    . "Stylized facts" concerning financial time series 4. ARCH and GARCH models 5. Forecasting with GARCH 6 of multivariate RV equivalence 8.5 examples 8.6 Extremes for GARCH and SV models 8.7 Summary of results for ACF of GARCH & SV models #12;4MaPhySto Workshop 9/04 Part III: Nonlinear and NonGaussian State-Space Models 1

  14. Probabilistic time-series

    E-Print Network [OSTI]

    Roweis, Sam

    SCIA 2003 Tutorial: Hidden Markov Models Sam Roweis, University of Toronto June 29, 2003 Probabilistic Generative Models for Time Series #15; Stochastic models for time-series: y 1 ; y 2 ; : : : ; y #15; Add noise to make the system stochastic: p(y t jy t 1 ;y t 2 ; : : : ;y t k ) #15; Markov models

  15. Is Time Inhomogeneous ?

    E-Print Network [OSTI]

    S. Davood Sadatian

    2014-05-08T23:59:59.000Z

    In this article, we discuss probability of inhomogeneous time in high or low energy scale of physics. Consequently, the possibility was investigated of using theories such as varying speed of light (VSL) and fractal mathematics to build a framework within which answers can be found to some of standard cosmological problems and physics theories on the basis of time non-homogeneity.

  16. The Measurement of Time

    E-Print Network [OSTI]

    A. Boyarsky; P Gora

    2007-05-07T23:59:59.000Z

    We present a definition of time measurement based on high energy photons and the fundamental length scale, and show that, for macroscopic time, it is in accord with the Lorentz transformation of special relativity. To do this we define observer in a different way than in special relativity.

  17. Emergence of Time

    E-Print Network [OSTI]

    M. Heller; W. Sasin

    1997-11-17T23:59:59.000Z

    In the groupoid approach to noncommutative quantization of gravity, gravitational field is quantized in terms of a C*-algebra A of complex valued funcions on a groupoid G (with convolution as multiplication). In the noncommutative quantum gravitational regime the concepts of space and time are meaningless. We study the "emergence of time" in the transition process from the noncommutative regime to the standard space-time geometry. Precise conditions are specified under which modular groups of the von Neumann algebra generated by A can be defined. These groups are interpreted as a state depending time flow. If the above conditions are further refined one obtains a state independent time flow. We show that quantum gravitational dynamics can be expressed in terms of modular groups.

  18. Time Evolution of Temperature and Entropy of a Gravitationally Collapsing Cylinder

    E-Print Network [OSTI]

    Evan Halstead; Peng Hao

    2011-06-12T23:59:59.000Z

    We investigate the time evolution of the temperature and entropy of a gravitationally collapsing cylinder, represented by an infinitely thin domain wall, as seen by an asymptotic observer. Previous work has shown that the entropy of a spherically symmetric collapsing domain approaches a constant, and we follow this procedure using a (3+1) BTZ metric to see if a different topology will yield different results. We do this by coupling a scalar field to the background of the domain wall and analyzing the spectrum of radiation as a function of time. We find that the spectrum is quasi-thermal, with the degree of thermality increasing as the domain wall approaches the horizon. The thermal distribution allows for the determination of the temperature as a function of time, and we find that the late time temperature is very close to the Hawking temperature and that it also exhibits the proper scaling with the mass. From the temperature we find the entropy. Since the collapsing domain wall is what forms a black hole, we can compare the results to those of the standard entropy-area relation. We find that the entropy does in fact approach a constant that is close to the Hawking entropy. However, the time dependence of the entropy shows that the entropy decreases with time, indicating that a (3+1) BTZ domain wall will not collapse spontaneously.

  19. Study downplays health concerns

    SciTech Connect (OSTI)

    Stringer, J.

    1996-03-13T23:59:59.000Z

    A government-funded study has concluded that reformulated gasoline containing methyl tert-butyl ether (MTBE) does not increase short-term health risks when compared with gasoline that does not contain the additive. The study, performed by the Health Effects Institute (Cambridge, MA), compared data from dozens of animal, human, and epidemiological studies of health effects linked to oxygenates, including MTBE and ethanol, but did not find enough evidence to warrant an immediate reduction in oxygenate use. However, the study did recommend that additional research be conducted on possible health consequences associated with the gasoline additives, including neurotoxic effects, if oxygenates continue to be used long term. Oxygenates have been used in gasoline since 1992, when EPA mandated that several municipalities use MTBE or other oxygenates in reformulated gasoline to reduce carbon monoxide emissions and meet Clean Air Act requirements. Shortly after the program began, residents in areas where the oxygenates were used complained of nausea, headaches, and dizziness. The institute says the study--funded by EPA and the Centers for Disease Control--will be used for a broader review of gasoline oxygenates by the White House Office of Science and Technology Policy.

  20. Incidents of Security Concern

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy ChinaofSchaefer To:DepartmentDepartment of EnergyEnergy JohnExcel12/17/1998NOT