autoregression favar approach: Topics by E-print Network
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errors Boley, Daniel 3 A differential autoregressive modeling approach within a point process framework for non-stationary heartbeat intervals analysis MIT - DSpace Summary:...
Gasoline and Diesel Fuel Update (EIA)
Method Data and Speci...cation VAR and FAVAR Extended Model Conclusion Appendix Test of su cient information Does the large dataset contain valuable information wrt the...
Optimization Online - Extending Algebraic Modelling Languages for ...
Christian Valente
2006-12-27T23:59:59.000Z
Dec 27, 2006 ... Extending Algebraic Modelling Languages for Stochastic Programming. Christian Valente(Christian.Valente ***at*** brunel.ac.uk) Gautam ...
Topological characterization in extended quantum Ising models
G. Zhang; Z. Song
2015-04-01T23:59:59.000Z
We show that a class of exactly solvable quantum Ising models, including transverse-field Ising model and anisotropic XY model, can be characterized as the loops in a two-dimensional auxiliary space. The transverse-field Ising model corresponds to a circle and the XY model corresponds to an ellipse, while other models yield a Cardioid, Limacon, Hypocycloid, and Lissajous curves, et al.. It is shown that the variation of the ground state energy density, which is a function of the loop, experiences a non-analytical point when the winding number of the corresponding loop changes. The winding number can serve as a topological quantum number of the quantum phases in the extended quantum Ising model, which sheds some light upon the relation between quantum phase transition and the geometrical order parameter characterizing the phase diagram.
Extended model for Richtmyer-Meshkov mix
Mikaelian, K O
2009-11-18T23:59:59.000Z
We examine four Richtmyer-Meshkov (RM) experiments on shock-generated turbulent mix and find them to be in good agreement with our earlier simple model in which the growth rate h of the mixing layer following a shock or reshock is constant and given by 2{alpha}A{Delta}v, independent of initial conditions h{sub 0}. Here A is the Atwood number ({rho}{sub B}-{rho}{sub A})/({rho}{sub B} + {rho}{sub A}), {rho}{sub A,B} are the densities of the two fluids, {Delta}V is the jump in velocity induced by the shock or reshock, and {alpha} is the constant measured in Rayleigh-Taylor (RT) experiments: {alpha}{sup bubble} {approx} 0.05-0.07, {alpha}{sup spike} {approx} (1.8-2.5){alpha}{sup bubble} for A {approx} 0.7-1.0. In the extended model the growth rate beings to day after a time t*, when h = h*, slowing down from h = h{sub 0} + 2{alpha}A{Delta}vt to h {approx} t{sup {theta}} behavior, with {theta}{sup bubble} {approx} 0.25 and {theta}{sup spike} {approx} 0.36 for A {approx} 0.7. They ascribe this change-over to loss of memory of the direction of the shock or reshock, signaling transition from highly directional to isotropic turbulence. In the simplest extension of the model h*/h{sub 0} is independent of {Delta}v and depends only on A. They find that h*/h{sub 0} {approx} 2.5-3.5 for A {approx} 0.7-1.0.
Buoyant melting instabilities beneath extending lithosphere: 1. Numerical models
Tackley, Paul J.
Buoyant melting instabilities beneath extending lithosphere: 1. Numerical models John W. Hernlund,1,2 Paul J. Tackley,1,3 and David J. Stevenson4 Received 18 November 2006; revised 18 October 2007 diffusely extending lithosphere is studied using numerical convection models covering a wide range
Extending Neuro-evolutionary Preference Learning through Player Modeling
California at Santa Cruz, University of
Extending Neuro-evolutionary Preference Learning through Player Modeling H´ector P. Mart approach extends neuro-evolutionary preference learning by embedding a player modeling module preferences of users using neuro-evolutionary pref- erence learning has provided highly accurate computational
Extending expectation propagation for graphical models
Qi, Yuan, 1974-
2005-01-01T23:59:59.000Z
Graphical models have been widely used in many applications, ranging from human behavior recognition to wireless signal detection. However, efficient inference and learning techniques for graphical models are needed to ...
Local Model Checking Games (Extended Abstract)
Stirling, Colin
University of Edinburgh Edinburgh EH9 3JZ, UK email: cps@uk.ac.ed.dcs 1 Introduction Model checking is a very to view this method as essentially algorithmic, and consequently a very fruitful relationship between that in the nite-state case these two approaches, model checking as essentially algorithmic and model checking
Local Model Checking Games (Extended Abstract)
Stirling, Colin
University of Edinburgh Edinburgh EH9 3JZ, UK email: cps@uk.ac.ed.dcs 1 Introduction Model checking is a very to view this method as essentially algorithmic, and consequently a very fruitful relationship between that in the finiteÂstate case these two approaches, model checking as essentially algorithmic and model checking
Extending ballistic graphene FET lumped element models to diffusive devices
Paris-Sud XI, Université de
Extending ballistic graphene FET lumped element models to diffusive devices G Vincenzi1,2 , G graphene field effect device model is presented. The model is based on the "Top-of-the-barrier" approach which is usually valid only for ballistic graphene nanotransistors. Proper modifications are introduced
A subliminal manipulation of the Extended Parallel Process Model
Stephenson, Michael Taylor
1993-01-01T23:59:59.000Z
the context of skin cancer. The goals of this study were to (1) assess the effects of subliminal embeds as fear appeals (2) within the framework of the Extended Parallel Process Model, the EPPM (Witte, 1992a). While this study demonstrated that subliminal... go unnoticed by individuals (Dixon, 1981). To extend the inquiry into subliminal message processing, this project places embedded pictures (a form of subliminal research) in the context of skin cancer This thesis uses the style of mm ni ' n...
Wave Speed in the Macroscopic Extended Model for Ultrarelativistic Gases
F. Borghero; F. Demontis; S. Pennisi
2010-12-07T23:59:59.000Z
An exact macroscopic extended model for ultrarelativistic gases, with an arbitrary number of moments, is present in the literature. Here we exploit equations determining wave speeds for that model. We find interesting results; for example, the whole system for their determination can be divided into independent subsystems and some, but not all, wave speeds are expressed by rational numbers. Moreover, the extraordinary property that these wave speeds for the macroscopic model are the same of those in the kinetic model, is proved.
Refining and Extending the Business Model with Information Technology: Dell Computer Corporation
Kraemer, Kenneth L; Dedrick, Jason; Yamashiro, Sandra
1999-01-01T23:59:59.000Z
of Dell’s Direct Business Model Fuels Fifteenth ConsecutiveAND EXTENDING THE REFINING AND EXTENDING THE BUSINESS MODELBUSINESS MODEL CENTER FOR RESEARCH ON INFORMATION TECHNOLOGY
Quantum Correlation in One-dimensional Extend Quantum Compass Model
Wen-Long You
2012-02-04T23:59:59.000Z
We study the correlations in the one-dimensional extended quantum compass model in a transverse magnetic field. By exactly solving the Hamiltonian, we find that the quantum correlation of the ground state of one-dimensional quantum compass model is vanishing. We show that quantum discord can not only locate the quantum critical points, but also discern the orders of phase transitions. Furthermore, entanglement quantified by concurrence is also compared.
Extended fluid models: Pressure tensor effects and equilibria
Cerri, S. S. [Physics Department “E. Fermi,” University of Pisa and CNISM, Largo B. Pontecorvo 3, 56127 Pisa (Italy) [Physics Department “E. Fermi,” University of Pisa and CNISM, Largo B. Pontecorvo 3, 56127 Pisa (Italy); Max-Planck-Institut für Plasmaphysik, EURATOM association, Boltzmannstr. 2, D-85748 Garching (Germany); Henri, P. [Physics Department “E. Fermi,” University of Pisa and CNISM, Largo B. Pontecorvo 3, 56127 Pisa (Italy) [Physics Department “E. Fermi,” University of Pisa and CNISM, Largo B. Pontecorvo 3, 56127 Pisa (Italy); Université de Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur, BP 4229 06304, Nice Cedex 4 (France); Califano, F.; Pegoraro, F. [Physics Department “E. Fermi,” University of Pisa and CNISM, Largo B. Pontecorvo 3, 56127 Pisa (Italy)] [Physics Department “E. Fermi,” University of Pisa and CNISM, Largo B. Pontecorvo 3, 56127 Pisa (Italy); Del Sarto, D. [Institut Jean Lamour, UMR 7198 CNRS – Université de Lorraine, BP 239 F-54506 Vandoeuvre les Nancy (France)] [Institut Jean Lamour, UMR 7198 CNRS – Université de Lorraine, BP 239 F-54506 Vandoeuvre les Nancy (France); Faganello, M. [International Institute for Fusion Science/PIIM, UMR 7345 CNRS Aix-Marseille University, Marseille (France)] [International Institute for Fusion Science/PIIM, UMR 7345 CNRS Aix-Marseille University, Marseille (France)
2013-11-15T23:59:59.000Z
We consider the use of “extended fluid models” as a viable alternative to computationally demanding kinetic simulations in order to manage the global large scale evolution of a collisionless plasma while accounting for the main effects that come into play when spatial micro-scales of the order of the ion inertial scale d{sub i} and of the thermal ion Larmor radius ?{sub i} are formed. We present an extended two-fluid model that retains finite Larmor radius (FLR) corrections to the ion pressure tensor while electron inertia terms and heat fluxes are neglected. Within this model we calculate analytic FLR plasma equilibria in the presence of a shear flow and elucidate the role of the magnetic field asymmetry. Using a Hybrid Vlasov code, we show that these analytic equilibria offer a significant improvement with respect to conventional magnetohydrodynamic shear-flow equilibria when initializing kinetic simulations.
Model Calibration of Exciter and PSS Using Extended Kalman Filter
Kalsi, Karanjit; Du, Pengwei; Huang, Zhenyu
2012-07-26T23:59:59.000Z
Power system modeling and controls continue to become more complex with the advent of smart grid technologies and large-scale deployment of renewable energy resources. As demonstrated in recent studies, inaccurate system models could lead to large-scale blackouts, thereby motivating the need for model calibration. Current methods of model calibration rely on manual tuning based on engineering experience, are time consuming and could yield inaccurate parameter estimates. In this paper, the Extended Kalman Filter (EKF) is used as a tool to calibrate exciter and Power System Stabilizer (PSS) models of a particular type of machine in the Western Electricity Coordinating Council (WECC). The EKF-based parameter estimation is a recursive prediction-correction process which uses the mismatch between simulation and measurement to adjust the model parameters at every time step. Numerical simulations using actual field test data demonstrate the effectiveness of the proposed approach in calibrating the parameters.
The Dynamically Extended Mind -- A Minimal Modeling Case Study
Tom Froese; Carlos Gershenson; David A. Rosenblueth
2013-05-08T23:59:59.000Z
The extended mind hypothesis has stimulated much interest in cognitive science. However, its core claim, i.e. that the process of cognition can extend beyond the brain via the body and into the environment, has been heavily criticized. A prominent critique of this claim holds that when some part of the world is coupled to a cognitive system this does not necessarily entail that the part is also constitutive of that cognitive system. This critique is known as the "coupling-constitution fallacy". In this paper we respond to this reductionist challenge by using an evolutionary robotics approach to create a minimal model of two acoustically coupled agents. We demonstrate how the interaction process as a whole has properties that cannot be reduced to the contributions of the isolated agents. We also show that the neural dynamics of the coupled agents has formal properties that are inherently impossible for those neural networks in isolation. By keeping the complexity of the model to an absolute minimum, we are able to illustrate how the coupling-constitution fallacy is in fact based on an inadequate understanding of the constitutive role of nonlinear interactions in dynamical systems theory.
Modeling Cyber Conflicts Using an Extended Petri Net Formalism
Zakrzewska, Anita N [ORNL; Ferragut, Erik M [ORNL
2011-01-01T23:59:59.000Z
When threatened by automated attacks, critical systems that require human-controlled responses have difficulty making optimal responses and adapting protections in real- time and may therefore be overwhelmed. Consequently, experts have called for the development of automatic real-time reaction capabilities. However, a technical gap exists in the modeling and analysis of cyber conflicts to automatically understand the repercussions of responses. There is a need for modeling cyber assets that accounts for concurrent behavior, incomplete information, and payoff functions. Furthermore, we address this need by extending the Petri net formalism to allow real-time cyber conflicts to be modeled in a way that is expressive and concise. This formalism includes transitions controlled by players as well as firing rates attached to transitions. This allows us to model both player actions and factors that are beyond the control of players in real-time. We show that our formalism is able to represent situational aware- ness, concurrent actions, incomplete information and objective functions. These factors make it well-suited to modeling cyber conflicts in a way that allows for useful analysis. MITRE has compiled the Common Attack Pattern Enumera- tion and Classification (CAPEC), an extensive list of cyber attacks at various levels of abstraction. CAPEC includes factors such as attack prerequisites, possible countermeasures, and attack goals. These elements are vital to understanding cyber attacks and to generating the corresponding real-time responses. We demonstrate that the formalism can be used to extract precise models of cyber attacks from CAPEC. Several case studies show that our Petri net formalism is more expressive than other models, such as attack graphs, for modeling cyber conflicts and that it is amenable to exploring cyber strategies.
SEMANTIC LEARNING MODEL AND EXTENDED STUDENT MODEL: TOWARDS AN AHAM-BASED ADAPTIVE SYSTEM
Paris-Sud XI, Université de
SEMANTIC LEARNING MODEL AND EXTENDED STUDENT MODEL: TOWARDS AN AHAM-BASED ADAPTIVE SYSTEM Hend hypermedia systems, we distinguish AHAM as the most popular reference model which is based on the Dexter hoc integration of the AHAM's user's model as well as the IMS/LIP and IEEE/PAPI standards. KEY WORDS
Polynomial fusion rings of W-extended logarithmic minimal models
Jorgen Rasmussen
2008-12-05T23:59:59.000Z
The countably infinite number of Virasoro representations of the logarithmic minimal model LM(p,p') can be reorganized into a finite number of W-representations with respect to the extended Virasoro algebra symmetry W. Using a lattice implementation of fusion, we recently determined the fusion algebra of these representations and found that it closes, albeit without an identity for p>1. Here, we provide a fusion-matrix realization of this fusion algebra and identify a fusion ring isomorphic to it. We also consider various extensions of it and quotients thereof, and introduce and analyze commutative diagrams with morphisms between the involved fusion algebras and the corresponding quotient polynomial fusion rings. One particular extension is reminiscent of the fundamental fusion algebra of LM(p,p') and offers a natural way of introducing the missing identity for p>1. Working out explicit fusion matrices is facilitated by a further enlargement based on a pair of mutual Moore-Penrose inverses intertwining between the W-fundamental and enlarged fusion algebras.
Parametrization of extended Gaussian disorder models from microscopic charge transport
Schmidt, Volker
-size effects at small charge densities, the data is fitted to the uncorrelated and correlated extended Gaussian to compound synthesis. 1 Introduction The optimization of organic photovoltaic cells,1,2 light emitting diodes,3 and field effect tran- sistors4 requires the improvement of the charge-carrier mobility, µ
Radiation transport modeling using extended quadrature method of moments
Vikas, V., E-mail: vvikas@iastate.edu [Department of Aerospace Engineering, 2271 Howe Hall, Iowa State University, Ames, IA 50011 (United States); Hauck, C.D., E-mail: hauckc@ornl.gov [Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Wang, Z.J., E-mail: zjw@ku.edu [Department of Aerospace Engineering, 2120 Learned Hall, University of Kansas, Lawrence, KS 66045 (United States); Fox, R.O., E-mail: rofox@iastate.edu [Department of Chemical and Biological Engineering, 2114 Sweeney Hall, Iowa State University, Ames, IA 50011 (United States)
2013-08-01T23:59:59.000Z
The radiative transfer equation describes the propagation of radiation through a material medium. While it provides a highly accurate description of the radiation field, the large phase space on which the equation is defined makes it numerically challenging. As a consequence, significant effort has gone into the development of accurate approximation methods. Recently, an extended quadrature method of moments (EQMOM) has been developed to solve univariate population balance equations, which also have a large phase space and thus face similar computational challenges. The distinct advantage of the EQMOM approach over other moment methods is that it generates moment equations that are consistent with a positive phase space density and has a moment inversion algorithm that is fast and efficient. The goal of the current paper is to present the EQMOM method in the context of radiation transport, to discuss advantages and disadvantages, and to demonstrate its performance on a set of standard one-dimensional benchmark problems that encompass optically thin, thick, and transition regimes. Special attention is given in the implementation to the issue of realizability—that is, consistency with a positive phase space density. Numerical results in one dimension are promising and lay the foundation for extending the same framework to multiple dimensions.
Metastable Aspects of Singlet Extended Higgs Models L. Clavelli
Clavelli, Louis J.
a possible decay of our false vacuum. We provide some analysis of the model including a treatment of phases states of the model have vanishing vacuum energy and are exactly supersymmetric. If the SESHM uH0 d - H+ u H- d . (1.2) lclavell@bama.ua.edu 1 #12;In the present work, focusing on the vacuum
Hybrid MHD-Gyrokinetic codes: extended models, new implementations and forthcoming applications
Vlad, Gregorio
P2.13 Hybrid MHD-Gyrokinetic codes: extended models, new implementations and forthcoming Alfv´en waves and energetic particles and their mutual interaction in toroidal devices. HMGC extended to include new physics. In this paper we will present the first simulations of an electron
Application of Extended Kalman Filter Techniques for Dynamic Model Parameter Calibration
Huang, Zhenyu; Du, Pengwei; Kosterev, Dmitry; Yang, Bo
2009-07-26T23:59:59.000Z
Abstract -Phasor measurement has previously been used for sub-system model validation, which enables rigorous comparison of model simulation and recorded dynamics and facilitates identification of problematic model components. Recent work extends the sub-system model validation approach with a focus on how model parameters may be calibrated to match recorded dynamics. In this paper, a calibration method using Extended Kalman Filter (EKF) technique is proposed. This paper presents the formulation as well as case studies to show the validity of the EKF-based parameter calibration method. The proposed calibration method is expected to be a cost-effective means complementary to traditional equipment testing for improving dynamic model quality.
Dark matter in B-L extended MSSM models
Khalil, S. [Centre for Theoretical Physics, British University in Egypt, El Sherouk City, Postal No, 11837, P.O. Box 43 (Egypt); Department of Mathematics, Ain Shams University, Faculty of Science, Cairo, 11566 (Egypt); Okada, H. [Centre for Theoretical Physics, British University in Egypt, El Sherouk City, Postal No, 11837, P.O. Box 43 (Egypt)
2009-04-15T23:59:59.000Z
We analyze the dark matter problem in the context of the supersymmetric U(1){sub B-L} model. In this model, the lightest neutralino can be the B-L gaugino Z-tilde{sub B-L} or the extra Higgsinos {chi}-tilde{sub 1,2} dominated. We compute the thermal relic abundance of these particles and show that, unlike the lightest neutralino in the MSSM, they can account for the observed relic abundance with no conflict with other phenomenological constraints. The prospects for their direct detection, if they are part of our galactic halo, are also discussed.
Damage Modeling and Life Extending Control of a Boiler-Turbine System1
Marquez, Horacio J.
for the development of life-prediction systems. Many methods for estimating fatigue life were proposed on which lifeDamage Modeling and Life Extending Control of a Boiler-Turbine System1 Donglin Li Tongwen Chen2 of the system. For model I, we incorporate the improved rainflow cycle counting method and a continuous
Extending G-Nets to Support Inheritance Modeling in Concurrent Object-Oriented Design
Xu, Haiping
Extending G-Nets to Support Inheritance Modeling in Concurrent Object-Oriented Design Haiping Xu and Sol M. Shatz The University of Illinois at Chicago Chicago, IL, 60607 Abstract G-Nets are a type of Petri net defined to support modeling of system as a set of independent and loosely-coupled modules
Extended light scattering model incorporating coherence for thin-film silicon solar cells
Lenstra, Arjen K.
Extended light scattering model incorporating coherence for thin-film silicon solar cells Thomas film solar cells. The model integrates coherent light propagation in thin layers with a direct, non efficiency spectra of state-of-the-art microcrystalline silicon solar cells. The simulations agree very well
Extending ER Models to Capture Database Transformations to Build Data Sets for Data Mining
Ordonez, Carlos
transformation tables in abstract form can be useful not only for optimizing the generation of new data sets stages of data transformation, mathematical functions and the powerful SQL CASE statement, which doesExtending ER Models to Capture Database Transformations to Build Data Sets for Data Mining Carlos
Instability of asymmetric nuclear matter in the extended Zimanyi-Moszkowski model
and the critical phenomena in nuclear matter. The nuclear multifragmentation is considered as the spinodal decom the empirical value of the critical temperature [13] for nuclear matter. Recently, the author has developedInstability of asymmetric nuclear matter in the extended Zimanyi-Moszkowski model K. Miyazaki
Critical phenomena of nuclear matter in the extended Zimanyi-Moszkowski model
Critical phenomena of nuclear matter in the extended Zimanyi-Moszkowski model K. Miyazaki Abstract in nuclear multifragmentation reactions and the critical temperature has been derived as TC = 20 3 MeV in Ref] to estimate the critical temperature for in...nite nuclear matter, that is, TC = 16:6 0:86 Me
A parametric study of the drift-tearing mode using an extended-magnetohydrodynamic model
King, J. R.; Kruger, S. E. [Tech-X Corporation, 5621 Arapahoe Ave. Suite A Boulder, Colorado 80303 (United States)
2014-10-15T23:59:59.000Z
The linear, collisional, constant-? drift-tearing mode is analyzed for different regimes of the plasma-?, ion-skin-depth parameter space with an unreduced, extended-magnetohydrodynamic model. New dispersion relations are found at moderate plasma ? and previous drift-tearing results are classified as applicable at small plasma ?.
Extending the Standard Model Effective Field Theory with the Complete Set of Dimension-7 Operators
Landon Lehman
2014-12-26T23:59:59.000Z
We present a complete list of the independent dimension-7 operators that are constructed using the Standard Model degrees of freedom and are invariant under the Standard Model gauge group. This list contains only 20 independent operators; far fewer than the 63 operators available at dimension 6. All of these dimension-7 operators contain fermions and violate lepton number, and 7 of the 20 violate baryon number as well. This result extends the Standard Model Effective Field Theory (SMEFT) and allows a more detailed exploration of the structure and properties of possible deformations from the Standard Model Lagrangian.
Zero modes' fusion ring and braid group representations for the extended chiral su(2) WZNW model
P. Furlan; L. Hadjiivanov; I. Todorov
2008-04-24T23:59:59.000Z
The zero modes' Fock space for the extended chiral $su(2)$ WZNW model gives room to a realization of the Grothendieck fusion ring of representations of the restricted $U_q sl(2)$ quantum universal enveloping algebra (QUEA) at an even ($2h$-th) root of unity, and of its extension by the Lusztig operators. It is shown that expressing the Drinfeld images of canonical characters in terms of Chebyshev polynomials of the Casimir invariant $C$ allows a streamlined derivation of the characteristic equation of $C$ from the defining relations of the restricted QUEA. The properties of the fusion ring of the Lusztig's extension of the QUEA in the zero modes' Fock space are related to the braiding properties of correlation functions of primary fields of the extended $su(2)_{h-2}$ current algebra model.
Gershgorin, B. [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, NY 10012 (United States); Harlim, J. [Department of Mathematics, North Carolina State University, NC 27695 (United States)], E-mail: jharlim@ncsu.edu; Majda, A.J. [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, NY 10012 (United States)
2010-01-01T23:59:59.000Z
The filtering and predictive skill for turbulent signals is often limited by the lack of information about the true dynamics of the system and by our inability to resolve the assumed dynamics with sufficiently high resolution using the current computing power. The standard approach is to use a simple yet rich family of constant parameters to account for model errors through parameterization. This approach can have significant skill by fitting the parameters to some statistical feature of the true signal; however in the context of real-time prediction, such a strategy performs poorly when intermittent transitions to instability occur. Alternatively, we need a set of dynamic parameters. One strategy for estimating parameters on the fly is a stochastic parameter estimation through partial observations of the true signal. In this paper, we extend our newly developed stochastic parameter estimation strategy, the Stochastic Parameterization Extended Kalman Filter (SPEKF), to filtering sparsely observed spatially extended turbulent systems which exhibit abrupt stability transition from time to time despite a stable average behavior. For our primary numerical example, we consider a turbulent system of externally forced barotropic Rossby waves with instability introduced through intermittent negative damping. We find high filtering skill of SPEKF applied to this toy model even in the case of very sparse observations (with only 15 out of the 105 grid points observed) and with unspecified external forcing and damping. Additive and multiplicative bias corrections are used to learn the unknown features of the true dynamics from observations. We also present a comprehensive study of predictive skill in the one-mode context including the robustness toward variation of stochastic parameters, imperfect initial conditions and finite ensemble effect. Furthermore, the proposed stochastic parameter estimation scheme applied to the same spatially extended Rossby wave system demonstrates high predictive skill, comparable with the skill of the perfect model for a duration of many eddy turnover times especially in the unstable regime.
Glinsky, M.E.; Amendt, P.A.; Bailey, D.S.; London, R.A.; Rubenchik, A.M. [Lawrence Livermore National Lab., CA (United States); Strauss, M. [Israel Atomic Energy Commission, Beersheba (Israel). Nuclear Research Center-Negev
1997-03-04T23:59:59.000Z
The validity of an extended Rayleigh model for laser generated bubbles in soft tissue is examined. This model includes surface tension, viscosity, a realistic water equation of state, material strength and failure, stress wave emission, and linear growth of interface instabilities. It is compared to dynamic simulations using LATIS, which include stress wave propagation, water equation of state, material strength and failure, and viscosity. The model and the simulations are compared using 1-D spherical geometry with bubble in center and a 2-D cylindrical geometry of a laser fiber in water with a bubble formed at the end of the fiber. The model executes over 300x faster on computer than the dynamic simulations.
Baklanov, Petr; Blinnikov, Sergei
2015-01-01T23:59:59.000Z
A model of a supernova explosion inside a dense extended hydrogenless envelope is proposed to explain the properties of the light curve for one of the superluminous supernovae PTF12dam. It is argued in the literature that the flux of this supernova rises too fast to be explained by the explosion model due to the instability associated with the electron-positron pair production (pair-instability supernova, PISNe), but it is well described by the models with energy input by a magnetar. We show that the PTF12dam-type supernovae can be explained without a magnetar in a model with a radiative shock in a dense circumstellar envelope that does not require an excessively large explosion energy.
T. P. Shestakova
2014-06-12T23:59:59.000Z
We construct Hamiltonian dynamics of the generalized spherically symmetric gravitational model in extended phase space. We start from the Faddeev - Popov effective action with gauge-fixing and ghost terms, making use of gauge conditions in differential form. It enables us to introduce missing velocities into the Lagrangian and then construct a Hamiltonian function according a usual rule which is applied for systems without constraints. The main feature of Hamiltonian dynamics in extended phase space is that it can be proved to be completely equivalent to Lagrangian dynamics derived from the effective action. We find a BRST invariant form of the effective action by adding terms not affecting Lagrangian equations. After all, we construct the BRST charge according to the Noether theorem. Our algorithm differs from that by Batalin, Fradkin and Vilkovisky, but the resulting BRST charge generates correct transformations for all gravitational degrees of freedom including gauge ones. Generalized spherically symmetric model imitates the full gravitational theory much better then models with finite number of degrees of freedom, so that one can expect appropriate results in the case of the full theory.
Istrail, Sorin
Fast Protein Folding in the Hydrophobic-hydrophilic Model Within Three-eights of Optimal (Extended for the protein folding problem in the hydrophobic- hydrophilic model, Dill (1985). To our knowledge, our al for this model, Dill (1994). The hydrophobic-hydrophilic model abstracts the dominant force of protein folding
Extended-soft-core Baryon-Baryon Model ESC08 I. Nucleon-Nucleon Scattering
M. M. Nagels; Th. A. Rijken; Y. Yamamoto
2014-08-20T23:59:59.000Z
The Nijmegen extended-sft-core ESC08c model for the baryon-baryon (BB) interactions of the SU(3) flavor-octet of baryons ($N, \\Lambda, \\Sigma$, and $\\Xi$) is presented. In this first of a series of papers, the NN results are reported in detail. In the spirit of the Yukawa-approach to the nuclear force problem, the interactions are studied from the meson-exchange picture viewpoint, using generalized soft-core Yukawa-functions. These interactions are supplemented with (i) multiple-gluon-exchange, and (ii) structural effects due to the quark-core of the baryons. The extended-soft-core (ESC) meson-exchange interactions consist of local- and non-local-potentials due to ((i) One-boson-exchanges (OBE, which are the members of nonets of pseudoscalar , vector, scalar, and axial-vector mesons, (ii) diffractive (i.e. multiple-gluon) exchanges, (iii) two pseudoscalar exchange (PS-PS), and (iv) meson-pair-exchange (MPE). The OBE- and MPE-vertices are regulated by gaussian form factors producing potentials with a soft behavior near the origin. The assignment of the cut-off masses for the BBM-vertices is dependent on the SU(3)-classification of the exchanged mesons for OBE, and a similar scheme for MPE. The simultaneous fit of the ESC-models to the NN- and YN-scattering data achieved excellent results for the NN, YN, and favorable properties for the $\\Lambda\\Lambda$ and $\\Xi N$ systems. In the case of ESC08c, the version of this paper, the results are: (i) For the selected 4313 pp and np scattering data ($ 0 \\leq T_{lab} \\leq 350$ MeV), the model achieved $\\chi^2/N_{data} = 1.08$. (ii) The deuteron binding energy and all NN low energy parameters are fitted very nicely. (iii) The YN-data are described also very well with $\\chi^/N_{data} = 1.09$. (iv) The model predicts a bound $\\Xi N(^3S_1,I=1)$ states with binding energy 1.56 MeV.
AN EXTENDED GRID OF NOVA MODELS. III. VERY LUMINOUS, RED NOVAE
Shara, Michael M.; Zurek, David [Department of Astrophysics, American Museum of Natural History, Central Park West and 79th Street, New York, NY 10024-5192 (United States); Yaron, Ofer; Prialnik, Dina; Kovetz, Attay [Department of Geophysics and Planetary Sciences, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv 69978 (Israel)
2010-12-10T23:59:59.000Z
Extremely luminous, red eruptive variables like RV in M31 are being suggested as exemplars of a new class of astrophysical objects. Our greatly extended series of nova simulations shows that classical nova models can produce very red, luminous eruptions. In a poorly studied corner of three-dimensional nova parameter space (very cold, low-mass white dwarfs, accreting at very low rates) we find bona fide classical novae that are very luminous and red because they eject very slowly moving, massive envelopes. A crucial prediction of these nova models-in contrast to the predictions of merging star ('mergeburst') models-is that a hot remnant, the underlying white dwarf, will emerge after the massive ejected envelope has expanded enough to become optically thin. This blue remnant must fade on a timescale of decades-much faster than a 'mergeburst', which must fade on timescales of millennia or longer. Furthermore, the cooling nova white dwarf and its expanding ejecta must become redder in the years after eruption, while a contracting mergeburst must become hotter and bluer. We predict that red novae will always brighten to L {approx} 1000 L{sub sun} for about one year before rising to the maximum luminosity at L {approx} 10{sup 6}-10{sup 7} L{sub sun}. The maximum luminosity attainable by a nova is likely to be L {approx} 10{sup 7} L{sub sun}, corresponding to M {approx} -12. In an accompanying paper, we describe a fading, luminous blue candidate for the remnant of M31-RV; it is observed with the Hubble Space Telescope to be compatible only with the nova model.
Cuta, Judith M.; Suffield, Sarah R.; Fort, James A.; Adkins, Harold E.
2013-08-15T23:59:59.000Z
The work reported here is an investigation of the sensitivity of component temperatures of a storage system, including fuel cladding temperatures, in response to age-related changes that could degrade the design-basis thermal behavior of the system. Three specific areas of interest were identified for this study. • degradation of the canister backfill gas from pure helium to a mixture of air and helium, resulting from postulated leakage due to stress corrosion cracking (SCC) of canister welds • changes in surface emissivity of system components, resulting from corrosion or other aging mechanisms, which could cause potentially significant changes in temperatures and temperature distributions, due to the effect on thermal radiation exchange between components • changes in fuel and basket temperatures due to changes in fuel assembly position within the basket cells in the canister The purpose of these sensitivity studies is to provide a realistic example of how changes in the physical properties or configuration of the storage system components can affect temperatures and temperature distributions. The magnitudes of these sensitivities can provide guidance for identifying appropriate modeling assumptions for thermal evaluations extending long term storage out beyond 50, 100, 200, and 300 years.
Extended models of gravity in SNIa cosmological data using genetic algorithms
López-Corona, O
2015-01-01T23:59:59.000Z
In this talk I explained briefly the advantages of using genetic algorithms on any measured data but specially astronomical ones. This kind of algorithms are not only a better computational paradigm, but they also allow for a more profound data treatment enhancing theoretical developments. As an example, I will use the SNIa cosmological data to fit the extended metric theories of gravity of Carranza et al. (2013, 2014) showing that the best parameters combination deviate from theoretical predicted ones by a minimal amount. This means that these kind of gravitational extensions are statistically robust and show that no dark matter and/or energy is required to explain the observations.
Twist map, the extended Frenkel-Kontorova model and the devil's staircase
Aubry, S.
1982-01-01T23:59:59.000Z
Exact results obtained on the discrete Frenkel Kontorova (FK) model and its extensions during the past few years are reviewed. These models are associated with area preserving twist maps of the cylinder (or a part of it) onto itself. The theorems obtained for the FK model thus yields new theorems for the twist maps. The exact structure of the ground-states which are either commensurate or incommensurate and assert the existence of elementary discommensurations under certain necessary and sufficient conditions is described. Necessary conditions for the trajectories to represent metastable configurations, which can be chaotic, are given. The existence of a finite Peierl Nabarro barrier for elementary discommensurations is connected with a property of non-integrability of the twist map. The existence of KAM tori corresponds to undefectible incommensurate ground-states and a theorem is given which asserts that when the phenon spectrum of an incommensurate ground-state exhibits a finite gap, then the corresponding trajectory is dense on a Cantor set with zero measure length. These theorems, when applied to the initial FK model, allows one to prove the existence of the transition by breaking of analyticity for the incommensurate structures when the parameter which describes the discrepancy of the model to the integrable limit varies. Finally, we describe a theorem proving the existence of a devil's staircase for the variation curve of the atomic mean distance versus a chemical potential, for certain properties of the twist map which are generally satisfied.
An extended SMLD approach for presumed probability density function in flamelet combustion model
Coclite, Alessandro; De Palma, Pietro; Cutrone, Luigi
2013-01-01T23:59:59.000Z
This paper provides an extension of the standard flamelet progress variable (FPV) approach for turbulent combustion, applying the statistically most likely distribution (SMLD) framework to the joint PDF of the mixture fraction, Z, and the progress variable, C. In this way one does not need to make any assumption about the statistical correlation between Z and C and about the behaviour of the mixture fraction, as required in previous FPV models. In fact, for state-of-the-art models, with the assumption of very-fast-chemistry,Z is widely accepted to behave as a passive scalar characterized by a $\\beta$-distribution function. Instead, the model proposed here, evaluates the most probable joint distribution of Z and C without any assumption on their behaviour and provides an effective tool to verify the adequateness of widely used hypotheses, such as their statistical independence. The model is validated versus three well-known test cases, namely, the Sandia flames. The results are compared with those obtained by ...
Testing a phenomenologically extended DGP model with upcoming weak lensing surveys
Camera, Stefano; Diaferio, Antonaldo [Dipartimento di Fisica Generale ''A. Avogadro'', Università di Torino, via P. Giuria 1, 10125 Torino (Italy); Cardone, Vincenzo F., E-mail: camera@ph.unito.it, E-mail: diaferio@ph.unito.it, E-mail: winnyenodrac@gmail.com [Dipartimento di Scienze e Tecnologie per l'Ambiente e il Territorio, Università degli Studi del Molise, Contrada Fonte Lappone, 86090 Pesche (Italy)
2011-01-01T23:59:59.000Z
A phenomenological extension of the well-known brane-world cosmology of Dvali, Gabadadze and Porrati (eDGP) has recently been proposed. In this model, a cosmological-constant-like term is explicitly present as a non-vanishing tension ? on the brane, and an extra parameter ? tunes the cross-over scale r{sub c}, the scale at which higher dimensional gravity effects become non negligible. Since the Hubble parameter in this cosmology reproduces the same ?CDM expansion history, we study how upcoming weak lensing surveys, such as Euclid and DES (Dark Energy Survey), can confirm or rule out this class of models. We perform Monte Carlo Markov Chain simulations to determine the parameters of the model, using Type Ia Supernovæ, H(z) data, Gamma Ray Bursts and Baryon Acoustic Oscillations. We also fit the power spectrum of the temperature anisotropies of the Cosmic Microwave Background to obtain the correct normalisation for the density perturbation power spectrum. Then, we compute the matter and the cosmic shear power spectra, both in the linear and non-linear régimes. The latter is calculated with the two different approaches of Hu and Sawicki (2007) (HS) and Khoury and Wyman (2009) (KW). With the eDGP parameters coming from the Markov Chains, KW reproduces the ?CDM matter power spectrum at both linear and non-linear scales and the ?CDM and eDGP shear signals are degenerate. This result does not hold with the HS prescription. Indeed, Euclid can distinguish the eDGP model from ?CDM because their expected power spectra roughly differ by the 3? uncertainty in the angular scale range 700?
Albers, Robert C [Los Alamos National Laboratory; Julien, Jean P [Los Alamos National Laboratory
2008-01-01T23:59:59.000Z
We have developed a new efficient and accurate impurity solver for the single impurity Anderson model (SIAM), which is based on a non-perturbative recursion technique in a space of operators and involves expanding the self-energy as a continued fraction. The method has no special occupation number or temperature restrictions; the only approximation is the number of levels of the continued fraction retained in the expansion. We also show how this approach can be used as a new approach to Dynamical Mean Field Theory (DMTF) and illustrate this with the Hubbard model. The three lowest orders of recursion give the Hartree-Fock, Hubbard I, and Hubbard III approximations. A higher level of recursion is able to reproduce the expected 3-peak structure in the spectral function and Fermi liquid behavior.
Classically conformal U(1)$^\\prime$ extended Standard Model and Higgs vacuum stability
Oda, Satsuki; Takahashi, Dai-suke
2015-01-01T23:59:59.000Z
We consider the minimal U(1)$^\\prime$ extension of the Standard Model (SM) with conformal invariance at the classical level, where in addition to the SM particle contents, three generations of right-handed neutrinos and a U(1)$^\\prime$ Higgs field are introduced. In the presence of the three right-handed neutrinos, which are responsible for the seesaw mechanism, this model is free from all the gauge and gravitational anomalies. The U(1)$^\\prime$ gauge symmetry is radiatively broken via the Coleman-Weinberg mechanism, by which the U(1)$^\\prime$ gauge boson ($Z^\\prime$ boson) mass as well as the Majorana mass for the right-handed neutrinos are generated. The radiative U(1)$^\\prime$ symmetry breaking also induces a negative mass squared for the SM Higgs doublet to trigger the electroweak symmetry breaking. In this context, we investigate a possibility to solve the SM Higgs vacuum instability problem. The model includes only three free parameters (U(1)$^\\prime$ charge of the SM Higgs doublet, U(1)$^\\prime$ gauge ...
Rate of reduction of ore-carbon composites: Part II. Modeling of reduction in extended composites
Fortini, O.M.; Fruehan, R.J. [US Steel Research & Technological Center, Monroeville, PA (United States)
2005-12-01T23:59:59.000Z
A new process for ironmaking was proposed using a rotary hearth furnace and an iron bath smelter to produce iron employing wood charcoal as an energy source and reductant. This paper examines reactions in composite pellet samples with sizes close to sizes used in industrial practice (10 to 16 min in diameter). A model was constructed using the combined kinetic mechanism developed in Part I of this series of articles along with equations for the computation of pellet temperature and shrinkage during the reaction. The analysis of reaction rates measured for pellets with wood charcoal showed that heat transfer plays a significant role in their overall rate of reaction at elevated temperatures. The slower rates measured in pellets containing coal char show that the intrinsic kinetics of carbon oxidation is more significant than heat transfer. Model calculations suggest that the rates are highly sensitive to the thermal conductivity of pellets containing wood charcoal and are less sensitive to the external conditions of heat transfer. It was seen that the changes in pellet surface area and diameter due to shrinkage introduce little change on reaction rates. The model developed provides an adequate description of pellets of wood charcoal up to circa 90% of reduction. Experimentally determined rates of reduction of iron oxide by wood charcoal were approximately 5 to 10 times faster than rates measured in pellets with coal char.
A. Sulaksono; Naosad Alam; B. K. Agrawal
2014-11-03T23:59:59.000Z
The model dependence and the symmetry energy dependence of the core-crust transition properties for the neutron stars are studied using three different families of systematically varied extended relativistic mean field model. Several forces within each of the families are so considered that they yield wide variations in the values of the nuclear symmetry energy $a_{\\rm sym}$ and its slope parameter $L$ at the saturation density. The core-crust transition density is calculated using a method based on random-phase-approximation. The core-crust transition density is strongly correlated, in a model independent manner, with the symmetry energy slope parameter evaluated at the saturation density. The pressure at the transition point dose not show any meaningful correlations with the symmetry energy parameters at the saturation density. At best, pressure at the transition point is correlated with the symmetry energy parameters and their linear combination evaluated at the some sub-saturation density. Yet, such correlations might not be model independent. The correlations of core-crust transition properties with the symmetry energy parameter are also studied by varying the symmetry energy within a single model. The pressure at the transition point is correlated once again with the symmetry energy parameter at the sub-saturation density.
Antikaons in the extended relativistic mean-field models for neutron star
Gupta, Neha; Arumugam, P. [Department of Physics, Indian Institute of Technology Roorkee, Roorkee - 247 667 (India)
2012-10-20T23:59:59.000Z
We review the role of antikaons in recent versions of relativistic mean field models and focus on the interactions in which all parameters are obtained by fitting finite nuclear data and successfully applied to reproduce a variety of nuclear and neutron star (NS) properties. We show that the recently observed 1.97 solar mass NS can be explained in three ways: (i) A stiffer EoS with both antikaons (K{sup -}, K-bar {sup 0}), (ii) a relatively softer EoS with K{sup -} and (iii) a softer EoS with nucleon phase only.
Mohaghegh, Shahab
1 Top-Down Intelligent Reservoir Models, Integrating Reservoir Engineering with AI&DM Extended Abstract, 2009 AAPG Annual Conventions, Denver Colorado TOP-DOWN INTELLIGENT RESERVOIR MODELING (TDIRM and the history matched model is used to strategize field development in order to improve recovery. Top
Guang-Hua Liu; Wei Li; Wen-Long You; Guang-Shan Tian; Gang Su
2012-06-02T23:59:59.000Z
The matrix product state (MPS) is utilized to study the ground state properties and quantum phase transitions (QPTs) of the one-dimensional quantum compass model (QCM). The MPS wavefunctions are argued to be very efficient descriptions of QCM ground states, and are numerically determined by imaginary time projections. The ground state energy, correlations, quantum entanglement and its spectrum, local and nonlocal order parameters, etc., are calculated and studied in details. It is revealed that the bipartite and block entanglement entropies, as well as the nearest neighbor correlation functions can be used to detect the second-order QPTs, but not the first-order ones, while fidelity detections can recognize both. The entanglement spectrum is extracted from the MPS wavefunction, and found to be doubly degenerate in disordered phases of QCM, where non-local string order parameters exist. Moreover, with linearized tensor renormalization group method, the specific heat curves are evaluated and their low temperature behaviors are investigated.
Exploiting Processor Groups to Extend Scalability of the GA Shared Memory Programming Model
Nieplocha, Jarek; Krishnan, Manoj Kumar; Palmer, Bruce J.; Tipparaju, Vinod; Zhang, Yeliang
2005-05-04T23:59:59.000Z
Exploiting processor groups is becoming increasingly important for programming next-generation high-end systems composed of tens or hundreds of thousands of processors. This paper discusses the requirements, functionality and development of multilevel-parallelism based on processor groups in the context of the Global Array (GA) shared memory programming model. The main effort involves management of shared data, rather than interprocessor communication. Experimental results for the NAS NPB Conjugate Gradient benchmark and a molecular dynamics (MD) application are presented for a Linux cluster with Myrinet and illustrate the value of the proposed approach for improving scalability. While the original GA version of the CG benchmark lagged MPI, the processor-group version outperforms MPI in all cases, except for a few points on the smallest problem size. Similarly, the group version of the MD application improves execution time by 58% on 32 processors.
Merkle, Peter Benedict
2006-03-01T23:59:59.000Z
Vulnerability analysis and threat assessment require systematic treatments of adversary and defender characteristics. This work addresses the need for a formal grammar for the modeling and analysis of adversary and defender engagements of interest to the National Nuclear Security Administration (NNSA). Analytical methods treating both linguistic and numerical information should ensure that neither aspect has disproportionate influence on assessment outcomes. The adversary-defender modeling (ADM) grammar employs classical set theory and notation. It is designed to incorporate contributions from subject matter experts in all relevant disciplines, without bias. The Attack Scenario Space U{sub S} is the set universe of all scenarios possible under physical laws. An attack scenario is a postulated event consisting of the active engagement of at least one adversary with at least one defended target. Target Information Space I{sub S} is the universe of information about targets and defenders. Adversary and defender groups are described by their respective Character super-sets, (A){sub P} and (D){sub F}. Each super-set contains six elements: Objectives, Knowledge, Veracity, Plans, Resources, and Skills. The Objectives are the desired end-state outcomes. Knowledge is comprised of empirical and theoretical a priori knowledge and emergent knowledge (learned during an attack), while Veracity is the correspondence of Knowledge with fact or outcome. Plans are ordered activity-task sequences (tuples) with logical contingencies. Resources are the a priori and opportunistic physical assets and intangible attributes applied to the execution of associated Plans elements. Skills for both adversary and defender include the assumed general and task competencies for the associated plan set, the realized value of competence in execution or exercise, and the opponent's planning assumption of the task competence.
Haihua Zhao; Ling Zou; Hongbin Zhang; David Andrs; Richard Martineau
2014-04-01T23:59:59.000Z
The reactor core isolation cooling (RCIC) system in a boiling water reactor (BWR) provides makeup water to the reactor vessel for core cooling when the main steam lines are isolated and the normal supply of water to the reactor vessel is lost. It was one of the very few safety systems still available during the Fukushima Daiichi accidents after the tsunamis hit the plants and the system successfully delayed the core meltdown for a few days for unit 2 & 3. Therefore, detailed models for RCIC system components are indispensable to understand extended station black-out accidents (SBO) for BWRs. As part of the effort to develop the new generation reactor system safety analysis code RELAP-7, major components to simulate the RCIC system have been developed. This paper describes the models for those components such as turbine, pump, and wet well. Selected individual component test simulations and a simplified SBO simulation up to but before core damage is presented. The successful implementation of the simplified RCIC and wet well models paves the way to further improve the models for safety analysis by including more detailed physical processes in the near future.
Ramsak, Anton
on gate voltage, source-drain voltage and magnetic field is discussed within the framework of an extended source-drain bias, even when the conductance plateau has disappeared. Under in- creasing in in back-gated,12 in shallow-etched13 point contacts and in a bal- listic quantum wire.14 At low
Kao, Jim [Los Alamos National Laboratory, Applied Physics Division, P.O. Box 1663, MS T086, Los Alamos, NM 87545 (United States)]. E-mail: kao@lanl.gov; Flicker, Dawn [Los Alamos National Laboratory, Applied Physics Division, P.O. Box 1663, MS T086, Los Alamos, NM 87545 (United States); Ide, Kayo [University of California at Los Angeles (United States); Ghil, Michael [University of California at Los Angeles (United States)
2006-05-20T23:59:59.000Z
This paper builds upon our recent data assimilation work with the extended Kalman filter (EKF) method [J. Kao, D. Flicker, R. Henninger, S. Frey, M. Ghil, K. Ide, Data assimilation with an extended Kalman filter for an impact-produced shock-wave study, J. Comp. Phys. 196 (2004) 705-723.]. The purpose is to test the capability of EKF in optimizing a model's physical parameters. The problem is to simulate the evolution of a shock produced through a high-speed flyer plate. In the earlier work, we have showed that the EKF allows one to estimate the evolving state of the shock wave from a single pressure measurement, assuming that all model parameters are known. In the present paper, we show that imperfectly known model parameters can also be estimated accordingly, along with the evolving model state, from the same single measurement. The model parameter optimization using the EKF can be achieved through a simple modification of the original EKF formalism by including the model parameters into an augmented state variable vector. While the regular state variables are governed by both deterministic and stochastic forcing mechanisms, the parameters are only subject to the latter. The optimally estimated model parameters are thus obtained through a unified assimilation operation. We show that improving the accuracy of the model parameters also improves the state estimate. The time variation of the optimized model parameters results from blending the data and the corresponding values generated from the model and lies within a small range, of less than 2%, from the parameter values of the original model. The solution computed with the optimized parameters performs considerably better and has a smaller total variance than its counterpart using the original time-constant parameters. These results indicate that the model parameters play a dominant role in the performance of the shock-wave hydrodynamic code at hand.
Moreira, Rodrigo A.; Melo, Celso P. de, E-mail: celso@df.ufpe.br [Departamento de Física, Universidade Federal de Pernambuco, Recife-PE 50670-901 (Brazil)
2014-09-28T23:59:59.000Z
Based on a quantum chemical valence formalism that allows the rigorous construction of best-localized molecular orbitals on specific parts of an extended system, we examined the separability of individual components of model systems relevant to the description of electron transport in molecular devices. We started by examining how to construct the maximally localized electronic density at the tip of a realistic model of a gold electrode. By varying the number of gold atoms included in the local region where to project the total electronic density, we quantitatively assess how many molecular orbitals are entirely localized in that region. We then considered a 1,4-benzene-di-thiol molecule connected to two model gold electrodes and examined how to localize the electronic density of the total system in the extended molecule, a fractional entity comprising the organic molecule plus an increasing number of the closest metal atoms. We were able to identify in a rigorous manner the existence of three physically different electronic populations, each one corresponding to a distinct set of molecular orbitals. First, there are those entirely localized in the extended molecule, then there is a second group of those completely distributed in the gold atoms external to that region, and, finally, there are those delocalized over the entire system. This latter group can be associated to the shared electronic population between the extended molecule and the rest of the system. We suggest that the treatment here presented could be useful in the theoretical analysis of the electronic transport in nanodevices whenever the use of localized molecular states are required by the physics of the specific problem, such as in cases of weak coupling and super-exchange limits.
Haba, Naoyuki
2015-01-01T23:59:59.000Z
We investigate the vacuum stability in a scale invariant local $U(1)_\\chi$ model with vanishing scalar potential at the Planck scale. We find that it is impossible to realize the Higgs mass of 125\\,GeV while keeping the Higgs quartic coupling $\\lambda_H$ to be positive in all energy scale, that is the same as the standard model. Once one allows $\\lambda_H0$ gives the upper bound in $N_\
Marcelo Gleiser; Sara Imari Walker
2008-02-20T23:59:59.000Z
A generalized autocatalytic model for chiral polymerization is investigated in detail. Apart from enantiomeric cross-inhibition, the model allows for the autogenic (non-catalytic) formation of left and right-handed monomers from a substrate with reaction rates $\\epsilon_L$ and $\\epsilon_R$, respectively. The spatiotemporal evolution of the net chiral asymmetry is studied for models with several values of the maximum polymer length, N. For N=2, we study the validity of the adiabatic approximation often cited in the literature. We show that the approximation obtains the correct equilibrium values of the net chirality, but fails to reproduce the short time behavior. We show also that the autogenic term in the full N=2 model behaves as a control parameter in a chiral symmetry- breaking phase transition leading to full homochirality from racemic initial conditions. We study the dynamics of the N -> infinity model with symmetric ($\\epsilon_L = \\epsilon_R$) autogenic formation, showing that it only achieves homochirality for $\\epsilon development of homochirality in prebiotic Earth and possible experimental verification of our findings.
this syn- chronous dataflow (SDF) paradigm. Since many digital signal processing algorithms have little to no data-depen- dent decision-making, SDF-based tools, and tools based on dataflow languages with SDF. Despite its limita- tions, SDF has some very desirable properties. It is there- fore desirable to extend
T. P. Shestakova
2013-03-06T23:59:59.000Z
Among theoretical issues in General Relativity the problem of constructing its Hamiltonian formulation is still of interest. The most of attempts to quantize Gravity are based upon Dirac generalization of Hamiltonian dynamics for system with constraints. At the same time there exists another way to formulate Hamiltonian dynamics for constrained systems guided by the idea of extended phase space. We have already considered some features of this approach in the previous MG12 Meeting by the example of a simple isotropic model. Now we apply the approach to a generalized spherically symmetric model which imitates the structure of General Relativity much better. In particular, making use of a global BRST symmetry and the Noether theorem, we construct the BRST charge that generates correct gauge transformations for all gravitational degrees of freedom.
W. Y. So; T. Udagawa; K. S. Kim; S. W. Hong; B. T. Kim
2006-12-13T23:59:59.000Z
Based on the extended optical model approach in which the polarization potential is decomposed into direct reaction (DR) and fusion parts, simultaneous $\\chi^{2}$ analyses are performed for elastic scattering and fusion cross section data for the $^{6}$Li+$^{208}$Pb system at near-Coulomb-barrier energies. A folding potential is used as the bare potential. It is found that the real part of the resultant DR part of the polarization potential is repulsive, which is consistent with the results from the Continuum Discretized Coupled Channel (CDCC) calculations and the normalization factors needed for the folding potentials. Further, it is found that both DR and fusion parts of the polarization potential satisfy separately the dispersion relation.
W. Y. So; S. W. Hong; B. T. Kim; T. Udagawa
2005-09-27T23:59:59.000Z
Based on the extended optical model approach in which the polarization potential is decomposed into direct reaction (DR) and fusion parts, simultaneous $\\chi^{2}$ analyses are performed for elastic scattering, DR, and fusion cross section data for the $^{9}$Be+$^{208}$Pb system at near-Coulomb-barrier energies. Similar $\\chi^{2}$ analyses are also performed by only taking into account the elastic scattering and fusion data as was previously done by the present authors, and the results are compared with those of the full analysis including the DR cross section data as well. We find that the analyses using only elastic scattering and fusion data can produce very consistent and reliable predictions of cross sections particularly when the DR cross section data are not complete. Discussions are also given on the results obtained from similar analyses made earlier for the $^{9}$Be+$^{209}$Bi system.
Guenther, A. B.
The Model of Emissions of Gases and Aerosols from Nature version 2.1 (MEGAN2.1) is a modeling framework for estimating fluxes of biogenic compounds between terrestrial ecosystems and the atmosphere using simple mechanistic ...
Fayolle, Edith C; Cuppen, Herma M; Visser, Ruud; Linnartz, Harold; 10.1051/0004-6361/201016121
2011-01-01T23:59:59.000Z
Ice desorption affects the evolution of the gas-phase chemistry during the protostellar stage, and also determines the chemical composition of comets forming in circumstellar disks. From observations, most volatile species are found in H2O-dominated ices. The aim of this study is first to experimentally determine how entrapment of volatiles in H2O ice depends on ice thickness, mixture ratio and heating rate, and second, to introduce an extended three-phase model (gas, ice surface and ice mantle) to describe ice mixture desorption with a minimum number of free parameters. Thermal H2O:CO2 ice desorption is investigated in temperature programmed desorption experiments of thin (10 - 40 ML) ice mixtures under ultra-high vacuum conditions. Desorption is simultaneously monitored by mass spectrometry and reflection-absorption infrared spectroscopy. The H2O:CO2 experiments are complemented with selected H2O:CO, and H2O:CO2:CO experiments. The results are modeled with rate equations that connect the gas, ice surface an...
Yushankhai, V.Y.; Oudovenko, V.S. [Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region (Russian Federation)] [Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region (Russian Federation); Hayn, R. [Max Planck Arbeitsgruppe Elektronensysteme, Technische Universitaet Dresden, D-01062 Dresden (Federal Republic of Germany)] [Max Planck Arbeitsgruppe Elektronensysteme, Technische Universitaet Dresden, D-01062 Dresden (Federal Republic of Germany)
1997-06-01T23:59:59.000Z
The reduction of the three-band p-d model for the CuO{sub 2} plane in cuprates with the standard set of parameters as derived by Hybertsen {ital et al.} [Phys. Rev. B {bold 41}, 11068 (1990)] to an effective t-t{sup {prime}}-t{sup {double_prime}}-J model with a three-site hopping term is discussed in detail in the framework of the cell-perturbation method. The reduction procedure is formulated to avoid any ambiguity in obtaining the correct signs of the hopping parameters in the effective model, and the contributions of first and second order resulting from the intercell hopping are distinguished. Based on the so-defined extended t-J model, the dispersion of a single hole in an antiferromagnetic background is calculated both by a variational ansatz and within the self-consistent Born approximation (SCBA). An extension of the variational method allows us to investigate the influence of a three-site hopping term both on the mean-field level and beyond this approximation. The latter corrections are shown to be small. Both methods give the coinciding result that the additional hopping terms lead to a more isotropic minimum of the dispersion at the point ({pi}/2,{pi}/2) in k space and to a slightly increased bandwidth in comparison to the pure t-J model. These results are compared with recent photoemission measurements for Sr{sub 2}CuO{sub 2}Cl{sub 2} [Wells {ital et al.}, Phys. Rev. Lett. {bold 74}, 964 (1995)], showing an improvement against the pure t-J model, but no complete agreement. In particular, a small anisotropy in the calculated effective masses remains. The lifetime of the hole quasiparticles is investigated within the SCBA, and it is shown that the upper part of the hole spectrum loses its quasiparticle character due to a strong increase of damping if the bare hole bandwidth exceeds a certain threshold value of roughly 2J. {copyright} {ital 1997} {ital The American Physical Society}
Wiesel, W.E. (Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433 (United States))
1992-12-15T23:59:59.000Z
The definition of a Lyapunov exponent can be extended to include an imaginary part. This extension requires the definition of a coordinate frame on the tangent space of the differential equation and an extension of the concept of a limit. The definition of extended Lyapunov exponents is based on the eigenvalues of the fundamental matrix. It is shown that the extended exponent agrees completely with the constant-coefficient case. It is shown that the eigenvectors and eigenvalues obey differential equations and can be propagated numerically without constructing the fundamental matrix itself. Bifurcation of eigenvalues and eigenvectors can also be followed numerically without recourse to the fundamental matrix. Two example applications of the method to the calculation of extended Lyapunov exponents are given. In the Lorenz problem, the real parts of the extended Lyapunov exponents agree quite well with previous results. Fourier-transform methods are used to show that the power spectrum of relative motion is discrete, with fundamental frequency quite close to the calculated imaginary part of the extended Lyapunov exponent. In the simple pendulum, the extended Lyapunov exponents are usually purely imaginary and are the relative oscillation frequencies of adjacent trajectories.
Extended foundations of stochastic prediction
Sergey Kamenshchikov
2014-06-28T23:59:59.000Z
The basic purpose of this work was to suggest universal quantitative description of ergodic system intermediate bifurcation and obligatory conditions of this transition. Conditions for existence of phase state and first order phase transition were introduced in terms of energy balance for system volume unit. Extended Fokker - Plank equation with time dependent diffusion factor was formulated. It turned out that for ergodic system with fixed boundary quantized energy spectrum of phase stable states exists. Obtained results may be applied for prediction of ergodic system behavior. If isolation condition is satisfied, phase spectrum quantization allows selecting proper control parameters for system stabilization. Information about current system coarsened energy allows predicting of future stochastic system behavior on the basis of extended Fokker - Plank model.
Hayashi, A.; Hashimoto, T.; Horibe, M. [Department of Applied Physics, Fukui University, Fukui 910-8507 (Japan)
2005-01-01T23:59:59.000Z
The quantum color coding scheme proposed by Korff and Kempe [e-print quant-ph/0405086] is easily extended so that the color coding quantum system is allowed to be entangled with an extra auxiliary quantum system. It is shown that in the extended scheme we need only {approx}2{radical}(N) quantum colors to order N objects in large N limit, whereas {approx}N/e quantum colors are required in the original nonextended version. The maximum success probability has asymptotics expressed by the Tracy-Widom distribution of the largest eigenvalue of a random Gaussian unitary ensemble (GUE) matrix.
Extended emission associated with young HII regions
S. P. Ellingsen; S. S. Shabala; S. E. Kurtz
2004-12-06T23:59:59.000Z
We have used the Australia Telescope Compact Array (ATCA) to make observations of a sample of eight young ultra-compact HII regions, selected on the basis that they have associated class II methanol maser emission. We have made observations sensitive to both compact and extended structures and find both to be present in most sources. The scale of the extended emission in our sample is in general less than that observed towards samples based on IRAS properties, or large single-dish flux densities. Our observations are consistent with a scenario where extended and compact radio continuum emission coexists within HII regions for a significant period of time. We suggest that these observations are consistent with a model where HII evolution takes place within hierarchically structured molecular clouds. This model is the subject of a companion paper (Shabala et al. 2005) and addresses both the association between compact and extended emission and UCHII region lifetime problem.
Extended inflation with induced gravity
Accetta, F. S.; Trester, J. J.
1989-05-15T23:59:59.000Z
We consider a recently proposed extended model of inflation which improves upon the original old inflation scenario by achieving a graceful exit from the false-vacuum phase. In this paper extended inflation is generalized to include a potential /ital V/(/phi/) for the Brans-Dicke-type field /phi/. We find that whereas a graceful exit can still be had, the inclusion of a potential places constraints on the percolation time scale for exiting the inflationary phase. Additional constraints on /ital V/(/phi/) and the false-vacuum energy density /rho//sub /ital F// from density and gravitational-wave perturbations are discussed. For initially small values of /phi/ the false vacuum undergoes power-law inflation, while for initially large values of /phi/ the expansion is exponential. Within true-vacuum regions slow-rolling inflation can occur. As a result, this model generically leads to multiple episodes of inflation. We discuss the significance these multiple episodes of inflation may have on the formation of large-scale structure and the production of voids.
Cardiovascular Signal Decomposition and Estimation with the Extended Kalman Smoother
Cardiovascular Signal Decomposition and Estimation with the Extended Kalman Smoother James Mc of cardiovascular signals that can be used with the extended Kalman filter or smoother to simultaneously estimate with the extended Kalman filter and smoother to estimate and track all the model parameters of interest including
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 3,625govInstrumentstdmadap Documentation TDMADAP :ProductsVaisala CL51InstrumentsCentral Facility SGP RelatedExtended
Understanding and Evaluating Extended Surfaces
Ganapathy, V.
Extended surfaces are widely used in heat transfer equipment in power and process plants. While various types of extended surfaces are used in the industry, this paper will limit the discussions to the widely used configurations in heat recovery...
Extending Amdahl's Law for Energy-Efficient
Lee, Hsien-Hsin "Sean"
Extending Amdahl's Law for Energy-Efficient Computing in the Many-Core Era Dong Hyuk Woo and Hsien design constraints to analyze many-core design alternatives. The revised models provide computer architects with a better understanding of many- core design types, enabling them to make more informed
W. Y. So; T. Udagawa; K. S. Kim; S. W. Hong; B. T. Kim
2007-06-05T23:59:59.000Z
Simultaneous $\\chi^{2}$ analyses previously made for elastic scattering and fusion cross section data for the $^{6}$Li+$^{208}$Pb system is extended to the $^{7}$Li+$^{208}$Pb system at near-Coulomb-barrier energies based on the extended optical model approach, in which the polarization potential is decomposed into direct reaction (DR) and fusion parts. Use is made of the double folding potential as a bare potential. It is found that the experimental elastic scattering and fusion data are well reproduced without introducing any normalization factor for the double folding potential and that both the DR and fusion parts of the polarization potential determined from the $\\chi^{2}$ analyses satisfy separately the dispersion relation. Further, we find that the real part of the fusion portion of the polarization potential is attractive while that of the DR part is repulsive except at energies far below the Coulomb barrier energy. A comparison is made of the present results with those obtained from the Continuum Discretized Coupled Channel (CDCC) calculations and a previous study based on the conventional optical model with a double folding potential. We also compare the present results for the $^7$Li+$^{208}$Pb system with the analysis previously made for the $^{6}$Li+$^{208}$Pb system.
On energy conservation in extended magnetohydrodynamics
Kimura, Keiji
2014-01-01T23:59:59.000Z
A systematic study of energy conservation for extended magnetohydrodynamic (MHD) models that include Hall terms and electron inertia is performed. It is observed that commonly used models do not conserve energy in the ideal limit, i.e., when viscosity and resistivity are neglected. In particular, a term in the momentum equation that is often neglected is seen to be needed for conservation of energy.
EXTENDED FORMULATIONS FOR INDEPENDENCE POLYTOPES ...
2015-04-15T23:59:59.000Z
1. Introduction. The theory of extended formulations deals with the concept ... contains basic definitions and facts about linear and regular matroids including 1-
Extended Computation Tree Logic
Axelsson, Roland; Kreutzer, Stephan; Lange, Martin; Latte, Markus
2010-01-01T23:59:59.000Z
We introduce a generic extension of the popular branching-time logic CTL which refines the temporal until and release operators with formal languages. For instance, a language may determine the moments along a path that an until property may be fulfilled. We consider several classes of languages leading to logics with different expressive power and complexity, whose importance is motivated by their use in model checking, synthesis, abstract interpretation, etc. We show that even with context-free languages on the until operator the logic still allows for polynomial time model-checking despite the significant increase in expressive power. This makes the logic a promising candidate for applications in verification. In addition, we analyse the complexity of satisfiability and compare the expressive power of these logics to CTL* and extensions of PDL.
Extended emission around GPS radio sources
C. Stanghellini; C. P. O'Dea; D. Dallacasa; P. Cassaro; S. A. Baum; R. Fanti; C. Fanti
2005-07-21T23:59:59.000Z
Extended radio emission detected around a sample of GHz Peaked Spectrum (GPS) radio sources is discussed. Evidence for extended emission which is related to the GPS source is found in 6 objects out of 33. Three objects are associated with quasars with core-jet pc-scale morphology, and three are identified with galaxies with symmetric (CSO) radio morphology. We conclude that the core-jet GPS quasars are likely to be beamed objects with a continuous supply of energy from the core to the kpc scale. It is also possible that low surface brightness extended radio emission is present in other GPS quasars but the emission is below our detection limit due to the high redshifts of the objects. On the other hand, the CSO/galaxies with extended large scale emission may be rejuvenated sources where the extended emission is the relic of previous activity. In general, the presence of large scale emission associated with GPS galaxies is uncommon, suggesting that in the context of the recurrent activity model, the time scale between subsequent bursts is in general longer than the radiative lifetime of the radio emission from the earlier activity.
W. Y. So; T. Udagawa; K. S. Kim; S. W. Hong; B. T. Kim
2010-03-14T23:59:59.000Z
Based on the extended optical model with the double folding potential, in which the polarization potential is decomposed into direct reaction (DR) and fusion parts, simultaneous $\\chi^{2}$ analyses are performed of elastic scattering and fusion cross section data for the $^{9}$Be+$^{28}$Si, $^{144}$Sm, and $^{208}$Pb systems at near-Coulomb-barrier energies. We find that the real part of the resultant DR part of the polarization potential is systematically repulsive for all the targets considered, which is consistent with the results deduced from the Continuum Discretized Coupled Channel (CDCC) calculations taking into account the polarization effects due to breakup. Further, it is found that both DR and fusion parts of the extracted polarization potentials satisfy the dispersion relation.
W. Y. So; T. Udagawa; S. W. Hong; B. T. Kim
2008-01-15T23:59:59.000Z
Simultaneous $\\chi^{2}$ analyses are performed for elastic scattering and fusion cross section data for the $^{12}$C+$^{208}$Pb system at near-Coulomb-barrier energies by using the extended optical model approach in which the polarization potential is decomposed into direct reaction (DR) and fusion parts. Use is made of the double folding potential as a bare potential. It is found that the experimental elastic scattering and fusion data are well reproduced without introducing any normalization factor for the double folding potential and also that both DR and fusion parts of the polarization potential determined from the $\\chi^{2}$ analyses satisfy separately the dispersion relation. Furthermore, it is shown that the imaginary parts of both DR and fusion potentials at the strong absorption radius change very rapidly, which results in a typical threshold anomaly in the total imaginary potential as observed with tightly bound projectiles such as $\\alpha$-particle and $^{16}$O.
Extender for securing a closure
Thomas, II, Patrick A.
2012-10-02T23:59:59.000Z
An apparatus for securing a closure such as door or a window that opens and closes by movement relative to a fixed structure such as a wall or a floor. Many embodiments provide a device for relocating a padlock from its normal location where it secures a fastener (such as a hasp) to a location for the padlock that is more accessible for locking and unlocking the padlock. Typically an extender is provided, where the extender has a hook at a first end that is disposed through the eye of the staple of the hasp, and at an opposing second end the extender has an annulus, such as a hole in the extender or a loop or ring affixed to the extender. The shackle of the padlock may be disposed through the annulus and may be disposed through the eye of a second staple to secure the door or window in a closed or open position. Some embodiments employ a rigid sheath to enclose at least a portion of the extender. Typically the rigid sheath has an open state where the hook is exposed outside the sheath and a closed state where the hook is disposed within the sheath.
Extended Abstract Model Formulation and Predictions
, and energy principles supplemented by appropriate geo- metrical and constitutive relations, 3) a description-stirred reactor in which all variables are at most time dependent. The system is broken into three subsystems
Extending algebraic modelling languages for Stochastic Programming
Robert Fourer
2006-12-27T23:59:59.000Z
(DML) which usually accompanies the DBMS for the development of customised viewers ... which is used to transfer only the relevant decision data to the DBMS.
Developing and Extending a Cyberinfrastructure Model
Alvarez, Rosio
2010-01-01T23:59:59.000Z
is composed of high performance computing systems, massivelandscape of high performance computing presents a similarincrease in high performance computing and high performance
The Center for Extended Magnetohydrodynamic Modeling
Elements in M3D", PPPL4032 Â· Cohen BI, .., Sovinec CR, et al, "Simulation of spheromak evolution and energy, ..., Sovinec CR, et al, "Magnetic reconnection during flux conversion in a driven spheromak", Phys. Plasmas 12
Lightweight extendable and retractable pole
Warren, John L. (Santa Barbara, CA); Brandt, James E. (Santa Barbara, CA)
1994-01-01T23:59:59.000Z
A lightweight extendable and retractable telescopic pole is disclosed comprising a plurality of non-metallic telescoping cylinders with sliding and sealing surfaces between the cylinders, a first plug member on the upper end of the smallest cylinder, and a second plug member on the lower end of the largest cylinder, whereby fluid pressure admitted to the largest cylinder will cause the telescoping cylinders to slide relative to one another causing the pole to extend. An elastomeric member connects the first plug member with one of the intermediate cylinders to urge the cylinders back into a collapsed position when the fluid pressure in the cylinders is vented. Annular elastomer members are provided which seal one cylinder to another when the pole is fully extended and further serve to provide a cushion to prevent damage to the cylinders when the pole is urged back into its retractable position by the elastomeric members and the venting of the pressure. A value mechanism associated with the pole is provided to admit a fluid under pressure to the interior of the telescoping cylinders of the pole while pressurizing a pressure relief port having an opening larger than the inlet port in a closed position whereby removal of the pressure on the relief port will cause the relief port to open to quickly lower the pressure in the interior of the telescoping cylinders to thereby assist in the rapid retraction of the extended pole.
Lightweight extendable and retractable pole
Warren, J.L.; Brandt, J.E.
1994-08-02T23:59:59.000Z
A lightweight extendable and retractable telescopic pole is disclosed comprising a plurality of non-metallic telescoping cylinders with sliding and sealing surfaces between the cylinders, a first plug member on the upper end of the smallest cylinder, and a second plug member on the lower end of the largest cylinder, whereby fluid pressure admitted to the largest cylinder will cause the telescoping cylinders to slide relative to one another causing the pole to extend. An elastomeric member connects the first plug member with one of the intermediate cylinders to urge the cylinders back into a collapsed position when the fluid pressure in the cylinders is vented. Annular elastomer members are provided which seal one cylinder to another when the pole is fully extended and further serve to provide a cushion to prevent damage to the cylinders when the pole is urged back into its retractable position by the elastomeric members and the venting of the pressure. A value mechanism associated with the pole is provided to admit a fluid under pressure to the interior of the telescoping cylinders of the pole while pressurizing a pressure relief port having an opening larger than the inlet port in a closed position whereby removal of the pressure on the relief port will cause the relief port to open to quickly lower the pressure in the interior of the telescoping cylinders to thereby assist in the rapid retraction of the extended pole. 18 figs.
Extended range chemical sensing apparatus
Hughes, Robert C. (Albuquerque, NM); Schubert, W. Kent (Albuquerque, NM)
1994-01-01T23:59:59.000Z
An apparatus for sensing chemicals over extended range of concentrations. In particular, first and second sensors each having separate, but overlapping ranges for sensing concentrations of hydrogen are provided. Preferably, the first sensor is a MOS solid state device wherein the metal electrode or gate is a nickel alloy. The second sensor is a chemiresistor comprising a nickel alloy.
Extended range chemical sensing apparatus
Hughes, R.C.; Schubert, W.K.
1994-01-18T23:59:59.000Z
An apparatus is described for sensing chemicals over extended range of concentrations. In particular, first and second sensors each having separate, but overlapping ranges for sensing concentrations of hydrogen are provided. Preferably, the first sensor is a MOS solid state device wherein the metal electrode or gate is a nickel alloy. The second sensor is a chemiresistor comprising a nickel alloy. 6 figures.
Entanglement distillation by extendible maps
Lukasz Pankowski; Fernando G. S. L. Brandao; Michal Horodecki; Graeme Smith
2013-08-25T23:59:59.000Z
It is known that from entangled states that have positive partial transpose it is not possible to distill maximally entangled states by local operations and classical communication (LOCC). A long-standing open question is whether maximally entangled states can be distilled from every state with a non-positive partial transpose. In this paper we study a possible approach to the question consisting of enlarging the class of operations allowed. Namely, instead of LOCC operations we consider k-extendible operations, defined as maps whose Choi-Jamiolkowski state is k-extendible. We find that this class is unexpectedly powerful - e.g. it is capable of distilling EPR pairs even from product states. We also perform numerical studies of distillation of Werner states by those maps, which show that if we raise the extension index k simultaneously with the number of copies of the state, then the class of k-extendible operations is not that powerful anymore and provide a better approximation to the set of LOCC operations.
Rai, Dhanpat; Felmy, Andrew R.; Moore, Dean A.; Kitamura, Akira; Yoshikawa, Hideki; Doi, Reisuke; Yoshida, Yasushi
2014-09-15T23:59:59.000Z
The solubility of Ba(SeO4, SO4) precipitates was determined as a function of the BaSeO4 mole fractions, ranging from 0.0015 to 0.3830, and time with an equilibration period extending to as long as 302 days. Equilibrium/steady state conditions in this system are reached in ? 65 days. Pitzer’s ion interaction model was used to calculate solid and aqueous phase activity coefficients. Thermodynamic analyses showed that the data do not satisfy Gibbs-Duhem equation, thereby demonstrating that a single-solid solution phase does not control both the selenate and sulfate concentrations. Our extensive data with log10 [Ba]) ranging from -3.6 to -5.9 mol.kg-1, log10 [SeO4]) ranging from -3.6 to -5.2 mol.kg-1, and log10 [SO4] ranging from -4.0 to -5.3 mol.kg-1 can be explained with the formation of an ideal BaSeO4 solid solution phase that controls the selenium concentrations and a slightly disordered/less-crystalline BaSO4(s) (log10 K0sp = -9.5 instead of -10.05 for barite) that controls the sulfate concentrations. In these experiments the BaSO4 component of the solid solution phase never reaches thermodynamic equilibrium with the aqueous phase. Thermodynamic interpretations of the data show that both the ideal BaSeO4 solid solution phase and less-crystalline BaSO4(s) phase are in equilibrium with each other in the entire range of BaSeO4 mole fractions investigated in this study.
Fuzzy membership function optimization for system identification using an extended Kalman filter
Simon, Dan
Fuzzy membership function optimization for system identification using an extended Kalman filter an extended Kalman filter to optimize the membership functions for system modeling, or system identification is that the proposed system acts as a noise-reducing filter. We demonstrate that the extended Kalman filter can
Estimation of the Dynamic States of Synchronous Machines Using an Extended Particle Filter
Zhou, Ning; Meng, Da; Lu, Shuai
2013-11-11T23:59:59.000Z
In this paper, an extended particle filter (PF) is proposed to estimate the dynamic states of a synchronous machine using phasor measurement unit (PMU) data. A PF propagates the mean and covariance of states via Monte Carlo simulation, is easy to implement, and can be directly applied to a non-linear system with non-Gaussian noise. The extended PF modifies a basic PF to improve robustness. Using Monte Carlo simulations with practical noise and model uncertainty considerations, the extended PF’s performance is evaluated and compared with the basic PF and an extended Kalman filter (EKF). The extended PF results showed high accuracy and robustness against measurement and model noise.
Pipe crawler with extendable legs
Zollinger, W.T.
1992-06-16T23:59:59.000Z
A pipe crawler for moving through a pipe in inchworm fashion having front and rear leg assemblies separated by air cylinders to increase and decrease the spacing between assemblies. Each leg of the four legs of an assembly is moved between a wall-engaging, extended position and a retracted position by a separate air cylinder. The air cylinders of the leg assemblies are preferably arranged in pairs of oppositely directed cylinders with no pair lying in the same axial plane as another pair. Therefore, the cylinders can be as long as a leg assembly is wide and the crawler can crawl through sections of pipes where the diameter is twice that of other sections. The crawler carries a valving system, a manifold to distribute air supplied by a single umbilical air hose to the various air cylinders in a sequence controlled electrically by a controller. The crawler also utilizes a rolling mechanism, casters in this case, to reduce friction between the crawler and pipe wall thereby further extending the range of the pipe crawler. 8 figs.
Pipe crawler with extendable legs
Zollinger, William T. (3927 Almon Dr., Martinez, GA 30907)
1992-01-01T23:59:59.000Z
A pipe crawler for moving through a pipe in inchworm fashion having front and rear leg assemblies separated by air cylinders to increase and decrease the spacing between assemblies. Each leg of the four legs of an assembly is moved between a wall-engaging, extended position and a retracted position by a separate air cylinder. The air cylinders of the leg assemblies are preferably arranged in pairs of oppositely directed cylinders with no pair lying in the same axial plane as another pair. Therefore, the cylinders can be as long a leg assembly is wide and the crawler can crawl through sections of pipes where the diameter is twice that of other sections. The crawler carries a valving system, a manifold to distribute air supplied by a single umbilical air hose to the various air cylinders in a sequence controlled electrically by a controller. The crawler also utilizes a rolling mechanism, casters in this case, to reduce friction between the crawler and pipe wall thereby further extending the range of the pipe crawler.
Initial conditions for anisotropic extended-type inflationary universes
del Campo, S. (Instituto de Fisica, Universidad Catolica de Valparaiso, Avenida Brasil 2950, Valparaiso (Chile))
1992-05-15T23:59:59.000Z
Recently, extended-type inflationary universe models have been proposed as an appealing approach for solving most of the cosmological puzzles'' that, in contrast with previous models, do not require a fine-tuning'' for the microphysical parameters present in the effective potential. These scenarios rest on a Brans-Dicke-type theory, where a nonminimal coupling of the form {ital f}({ital cphi}){ital R} is assumed, and it may or may not include a potential for the Brans-Dicke field. In its classical description, different extended inflationary universe scenarios are described, where anisotropy is taken into account. By using the Hartle-Hawking and the Vilenkin boundary conditions for the wave function of the Universe, the probability distributions for the initial states of these extended models in the case of a small anisotropy are determined and discussed.
EXTENDED FORMULATIONS FOR PACKING AND PARTITIONING ...
2008-06-02T23:59:59.000Z
The topic of this paper are extended formulations for these orbitopes, i.e., (sim- ple) linear descriptions of ... Extending over pages 18 to. 27, it hardly leaves (not
The Physics Case for Extended Tevatron Running
Darien R. Wood
2010-11-06T23:59:59.000Z
Run II of the Tevatron collider at Fermilab is currently scheduled to end late in 2011. Given the current performance of the collider and of the CDF and D0 detectors, it is estimated that the current data set could be approximately doubled with a run extended into 2014. A few examples are presented of the physics potential of these additional statistics. These are discussed in the context of the expected reach of the LHC 7 TeV data and the existing Tevatron data. In particular, an extraordinary opportunity is described which could probe the existence of a standard model Higgs boson with mass in the currently preferred region between 115 GeV and 150 GeV.
The Physics Case for Extended Tevatron Running
Wood, Darien R.
2010-11-01T23:59:59.000Z
Run II of the Tevatron collider at Fermilab is currently scheduled to end late in 2011. Given the current performance of the collider and of the CDF and D0 detectors, it is estimated that the current data set could be approximately doubled with a run extended into 2014. A few examples are presented of the physics potential of these additional statistics. These are discussed in the context of the expected reach of the LHC 7 TeV data and the existing Tevatron data. In particular, an extraordinary opportunity is described which could probe the existence of a standard model Higgs boson with mass in the currently preferred region between 115 GeV and 150 GeV.
Pair extended coupled cluster doubles
Henderson, Thomas M; Scuseria, Gustavo E
2015-01-01T23:59:59.000Z
The accurate and efficient description of strongly correlated systems remains an important challenge for computational methods. Doubly occupied configuration interaction (DOCI), in which all electrons are paired and no correlations which break these pairs are permitted, can in many cases provide an accurate account of strong correlations, albeit at combinatorial computational cost. Recently, there has been significant interest in a method we refer to as pair coupled cluster doubles (pCCD), a variant of coupled cluster doubles in which the electrons are paired. This is simply because pCCD provides energies nearly identical to those of DOCI, but at mean-field computational cost (disregarding the cost of the two-electron integral transformation). Here, we introduce the more complete pair extended coupled cluster doubles (pECCD) approach which, like pCCD, has mean-field cost and reproduces DOCI energetically. We show that unlike pCCD, pECCD also reproduces the DOCI wave function with high accuracy. Moreoever, pEC...
Optimal Storage Policies with Wind Forecast Uncertainties [Extended Abstract
Dalang, Robert C.
Optimal Storage Policies with Wind Forecast Uncertainties [Extended Abstract] Nicolas Gast EPFL, IC generation. The use of energy storage compensates to some extent these negative effects; it plays a buffer role between demand and production. We revisit a model of real storage proposed by Bejan et al.[1]. We
Extended Response to Weir and Smith Sven E. Wilson
Martinez, Tony R.
Extended Response to Weir and Smith Sven E. Wilson Brigham Young University Benjamin L. Howell University Phone: (801) 422-9018 Email: sven@byu.edu #12;2 Abstract Evidence provided by Weir and Smith and a variety of regression models (including that of Weir and Smith). In particular, our pooled regression
Critical phenomena of asymmetric nuclear matter in the extended
Critical phenomena of asymmetric nuclear matter in the extended Zimanyi-Moszkowski model K nuclear matter produced by heavy-ion reactions is isospin asymmetric. Although the critical exponents. Miyazaki Abstract We have studied the liquid-gas phase transition of warm asymmetric nuclear matter
Quasi light fields: extending the light field to coherent radiation
Wornell, Gregory W.
Quasi light fields: extending the light field to coherent radiation Anthony Accardi1,2 and Gregory light field, and for coherent radiation using electromagnetic field theory. We present a model of coherent image formation that strikes a balance between the utility of the light field
Extended silicate dust emission in PG QSOs
M. Schweitzer; B. Groves; H. Netzer; D. Lutz; E. Sturm; A. Contursi; R. Genzel; L. J. Tacconi; S. Veilleux; D. -C. Kim; D. Rupke; A. J. Baker
2008-01-30T23:59:59.000Z
This paper addresses the origin of the silicate emission observed in PG QSOs, based on observations with the Spitzer Space Telescope. Scenarios based on the unified model suggest that silicate emission in AGN arises mainly from the illuminated faces of the clouds in the torus at temperatures near sublimation. However, detections of silicate emission in Type 2 QSOs, and the estimated cool dust temperatures, argue for a more extended emission region.To investigate this issue we present the mid-infrared spectra of 23 QSOs. These spectra, and especially the silicate emission features at ~10 and ~18 mu can be fitted using dusty narrow line region (NLR) models and a combination of black bodies. The bolometric luminosities of the QSOs allow us to derive the radial distances and covering factors for the silicate-emitting dust. The inferred radii are 100-200 times larger than the dust sublimation radius, much larger than the expected dimensions of the inner torus. Our QSO mid-IR spectra are consistent with the bulk of the silicate dust emission arising from the dust in the innermost parts of the NLR.
Extending the Operating Lives of Materials
Paul Jablonski
2010-09-01T23:59:59.000Z
Metallurgist Paul Jablonski discusses his role in developing processes that extend the operating temperatures and operating lives of materials used in energy applications.
Extending the Operating Lives of Materials
Paul Jablonski
2010-01-26T23:59:59.000Z
Metallurgist Paul Jablonski discusses his role in developing processes that extend the operating temperatures and operating lives of materials used in energy applications.
Sandia National Laboratories: extend the complete combustion...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
extend the complete combustion zone Sandia Maps Multiple Paths to Cleaner, Low-Temp Diesels On October 22, 2013, in CRF, Energy, Facilities, News, News & Events, Partnership,...
Dynamical Friction on extended perturbers
O. Esquivel; B. Fuchs
2008-04-01T23:59:59.000Z
Following a wave-mechanical treatment we calculate the drag force exerted by an infinite homogeneous background of stars on a perturber as this makes its way through the system. We recover Chandrasekhar's classical dynamical friction (DF) law with a modified Coulomb logarithm. We take into account a range of models that encompasses all plausible density distributions for satellite galaxies by considering the DF exerted on a Plummer sphere and a perturber having a Hernquist profile. It is shown that the shape of the perturber affects only the exact form of the Coulomb logarithm. The latter converges on small scales, because encounters of the test and field stars with impact parameters less than the size of the massive perturber become inefficient. We confirm this way earlier results based on the impulse approximation of small angle scatterings.
Extended Fractal Fits to Riemann Zeros
Paul B. Slater
2007-05-21T23:59:59.000Z
We extend to the first 300 Riemann zeros, the form of analysis reported by us in arXiv:math-ph/0606005, in which the largest study had involved the first 75 zeros. Again, we model the nonsmooth fluctuating part of the Wu-Sprung potential, which reproduces the Riemann zeros, by the alternating-sign sine series fractal of Berry and Lewis A(x,g). Setting the fractal dimension equal to 3/2. we estimate the frequency parameter (g), plus an overall scaling parameter (s) introduced. We search for that pair of parameters (g,s) which minimizes the least-squares fit of the lowest 300 eigenvalues -- obtained by solving the one-dimensional stationary (non-fractal) Schrodinger equation with the trial potential (smooth plus nonsmooth parts) -- to the first 300 Riemann zeros. We randomly sample values within the rectangle 0 fractal supplementation. Some limited improvement is again found. There are two (primary and secondary) quite distinct subdomains, in which the values giving improvements in fit are concentrated.
Apparatus and methods for a human extender
Jansen, John F. (Knoxville, TN)
2001-01-01T23:59:59.000Z
A human extender controller for interface between a human operator and a physical object through a physical plant. The human extender controller uses an inner-feedback loop to increase the equivalent damping of the operating system to stabilize the system when it contacts with the environment and reduces the impact of the environment variation by utilizing a high feedback gain, determined by a root locus sketch. Because the stability of the human extender controller of the present invention is greatly enhanced over that of the prior art, the present invention is able to achieve a force reflection ratio 500 to 1 and capable of handling loads above the two (2) ton range.
Extended core for motor/generator
Shoykhet, Boris A.
2005-05-10T23:59:59.000Z
An extended stator core in a motor/generator can be utilized to mitigate losses in end regions of the core and a frame of the motor/generator. To mitigate the losses, the stator core can be extended to a length substantially equivalent to or greater than a length of a magnetically active portion in the rotor. Alternatively, a conventional length stator core can be utilized with a shortened magnetically active portion to mitigate losses in the motor/generator. To mitigate the losses in the core caused by stator winding, the core can be extended to a length substantially equivalent or greater than a length of stator winding.
Extended core for motor/generator
Shoykhet, Boris A.
2006-08-22T23:59:59.000Z
An extended stator core in a motor/generator can be utilized to mitigate losses in end regions of the core and a frame of the motor/generator. To mitigate the losses, the stator core can be extended to a length substantially equivalent to or greater than a length of a magnetically active portion in the rotor. Alternatively, a conventional length stator core can be utilized with a shortened magnetically active portion to mitigate losses in the motor/generator. To mitigate the losses in the core caused by stator winding, the core can be extended to a length substantially equivalent or greater than a length of stator winding.
Estimating Power System Dynamic States Using Extended Kalman Filter
Huang, Zhenyu; Schneider, Kevin P.; Nieplocha, Jaroslaw; Zhou, Ning
2014-10-31T23:59:59.000Z
Abstract—The state estimation tools which are currently deployed in power system control rooms are based on a steady state assumption. As a result, the suite of operational tools that rely on state estimation results as inputs do not have dynamic information available and their accuracy is compromised. This paper investigates the application of Extended Kalman Filtering techniques for estimating dynamic states in the state estimation process. The new formulated “dynamic state estimation” includes true system dynamics reflected in differential equations, not like previously proposed “dynamic state estimation” which only considers the time-variant snapshots based on steady state modeling. This new dynamic state estimation using Extended Kalman Filter has been successfully tested on a multi-machine system. Sensitivity studies with respect to noise levels, sampling rates, model errors, and parameter errors are presented as well to illustrate the robust performance of the developed dynamic state estimation process.
Extended axion electrodynamics: Optical activity induced by nonstationary dark matter
A. B. Balakin; N. O. Tarasova
2012-01-14T23:59:59.000Z
We establish a new self-consistent Einstein-Maxwell-axion model based on the Lagrangian, which is linear in the pseudoscalar (axion) field and its four-gradient and includes the four-vector of macroscopic velocity of the axion system as a whole. We consider extended equations of the axion electrodynamics, modified gravity field equations, and discuss nonstationary effects in the phenomenon of optical activity induced by axions.
Extending dependencies for improving data quality
Ma, Shuai
2011-06-30T23:59:59.000Z
This doctoral thesis presents the results of my work on extending dependencies for improving data quality, both in a centralized environment with a single database and in a data exchange and integration environment with ...
Limitations of extended reach drilling in deepwater
Akinfenwa, Akinwunmi Adebayo
2000-01-01T23:59:59.000Z
As the worldwide search for hydrocarbons continues into the deepwater of the oceans, drilling extended reach wells have helped to drain the fields in the most cost effective way, thus providing the oil and gas industry the cushion to cope...
PALC: Extending ALC ABoxes with Probabilities
JÃ¤ger, Gerhard
on description logics can be found in [BCM+ 03] and [BKW03]. For many applications it is important to extend on probabilities on terminological axioms, see for example [BKW03, Hei94, KLP97]. Notable exceptions are [Jae94, GL
Extended RDF as a Semantic Foundation of Rule Markup Languages
Analyti, Anastasia; Damásio, Carlos Viegas; Wagner, Gerd; 10.1613/jair.2425
2011-01-01T23:59:59.000Z
Ontologies and automated reasoning are the building blocks of the Semantic Web initiative. Derivation rules can be included in an ontology to define derived concepts, based on base concepts. For example, rules allow to define the extension of a class or property, based on a complex relation between the extensions of the same or other classes and properties. On the other hand, the inclusion of negative information both in the form of negation-as-failure and explicit negative information is also needed to enable various forms of reasoning. In this paper, we extend RDF graphs with weak and strong negation, as well as derivation rules. The ERDF stable model semantics of the extended framework (Extended RDF) is defined, extending RDF(S) semantics. A distinctive feature of our theory, which is based on Partial Logic, is that both truth and falsity extensions of properties and classes are considered, allowing for truth value gaps. Our framework supports both closed-world and open-world reasoning through the explicit...
Extended Hamiltonian systems in multisymplectic field theories
Echeverria-Enriquez, Arturo; Leon, Manuel de; Munoz-Lecanda, Miguel C.; Roman-Roy, Narciso [Departamento de Matematica Aplicada IV, Campus Norte UPC, Edificio C-3, C/Jordi Girona 1, E-08034 Barcelona (Spain); Instituto de Matematicas y Fisica Fundamental, CSIC, C/Serrano 123, E-28006 Madrid (Spain); Departamento de Matematica Aplicada IV, Campus Norte UPC, Edificio C-3, C/Jordi Girona 1, E-08034 Barcelona (Spain)
2007-11-15T23:59:59.000Z
We consider Hamiltonian systems in first-order multisymplectic field theories. We review the properties of Hamiltonian systems in the so-called restricted multimomentum bundle, including the variational principle which leads to the Hamiltonian field equations. In an analogous way to how these systems are defined in the so-called extended (symplectic) formulation of nonautonomous mechanics, we introduce Hamiltonian systems in the extended multimomentum bundle. The geometric properties of these systems are studied, the Hamiltonian equations are analyzed using integrable multivector fields, the corresponding variational principle is also stated, and the relation between the extended and the restricted Hamiltonian systems is established. All these properties are also adapted to certain kinds of submanifolds of the multimomentum bundles in order to cover the case of almost-regular field theories.
Extended Chaos Theory and Multiparticle Production
Yi-Fang Chang
2008-08-02T23:59:59.000Z
First, using the method of the soliton-solution, the fermion probability density equation, which corresponds to the Dirac equation, is derived. Next, we extend the chaos theory, in which the period bifurcation is equivalent to the particle production. Then this extended chaos theory can be used for description of the multiparticle production and the extensive air showers at high energy. Let the parameter takes a suitable value, the quantitative results will be obtained, and an approximate formula will be derived. Many properties of the multiparticle production and of the chaos theory are universal.
EXTENDED PARKING REQUEST COLORADO SCHOOL OF MINES
for an extended period of time. Vehicle registration and a valid CSM parking permit must be current and visible: __________________________ Your Permit #: ______________________________ License Plate Number and State of Issue be current and valid thru the expected date of return indicated below * In consideration for being permitted
EXTENDING GEOSPATIAL REPOSITORIES WITH GEOSEMANTIC PROXIMITY FUNCTIONALITIES
EXTENDING GEOSPATIAL REPOSITORIES WITH GEOSEMANTIC PROXIMITY FUNCTIONALITIES TO FACILITATE THE INTEROPERABILITY OF GEOSPATIAL DATA Jean Brodeur a, b , Yvan Bédard a a Centre for Research in Geomatics, Laval.Bedard@scg.ulaval.ca Commission IV, WG IV/1 KEY WORDS: Geospatial data interoperability, Geospatial repository, Geosemantic
Extending additivity from symmetric to asymmetric channels
Motohisa Fukuda
2005-08-14T23:59:59.000Z
We prove a lemma which allows one to extend results about the additivity of the minimal output entropy from highly symmetric channels to a much larger class. A similar result holds for the maximal output $p$-norm. Examples are given showing its use in a variety of situations. In particular, we prove the additivity and the multiplicativity for the shifted depolarising channel.
SF STATE Extended Learning PROFESSIONAL DEVELOPMENT PROGRAM
. See www.pmi.org for credential requirements. The current first time pass rate of our students for the PMP Exam is 89%. PMBOK is a registered mark of the Project Management Institute, Inc. The PMI SF State Extended Learning is approved by the Project Management Institute (PMI)® as a Registered
Extending the Upper Temperature Limit for Life
Lovley, Derek
) un- der N2-CO2 (80:20) in sealed culture tubes that con- tained formate (10 mM) as the electron donor that permit strain 121 to grow at such high temperatures are unknown. It is gen- erally assumed that the upperExtending the Upper Temperature Limit for Life Kazem Kashefi and Derek R. Lovley* The upper
Jitter Regulation for Multiple Streams (Extended Abstract)
Hay, David
Jitter Regulation for Multiple Streams (Extended Abstract) David Hay and Gabriel Scalosub Computer as possible; the smoothness of a traffic is typically captured by its delay jitter, i.e., the difference between the maximal and minimal end-to-end delays. The task of minimizing the jitter is done by jitter
Column Generation for Extended Formulations - Optimization Online
2011-07-08T23:59:59.000Z
Jul 8, 2011 ... reformulation in order to define a good quality outer approximation of the .... extends to the case where one only has a good reformulation in an ..... by inspection. ..... the formulation is kept under control by way of managing its variables .... ming solution as a hyper-path (associated to a unit flow incoming to
EXTENDED DESCRIPTION TECHNIQUES FOR SECURITY ENGINEERING
of security critical systems. Based on general security evaluation criteria, we show how to extend the system applications that communi- cate over open networks like the Internet--security is an extremely important issue this problem, on the one hand there are highly sophisticated col- lections of evaluation criteria that security
Unified universe history through phantom extended Chaplygin gas
Pourhassan, B
2015-01-01T23:59:59.000Z
We investigate the universe evolution from inflation to late-time acceleration in a unified way, using a two-component fluid constituted from extended Chaplygin gas alongside a phantom scalar field. We extract solutions for the various cosmological eras, focusing on the behavior of the scale factor, the various density parameters and the equation-of-state parameter. Furthermore, we extract and discuss bouncing solutions. Finally, we examine the perturbations of the model, ensuring about their stability and extracting the predictions for the tensor-to-scalar ratio.
Extended Kalman filtering applied to a two-axis robotic arm with flexible links
Lertpiriyasuwat, V.; Berg, M.C.; Buffinton, K.W.
2000-03-01T23:59:59.000Z
An industrial robot today uses measurements of its joint positions and models of its kinematics and dynamics to estimate and control its end-effector position. Substantially better end-effector position estimation and control performance would be obtainable if direct measurements of its end-effector position were also used. The subject of this paper is extended Kalman filtering for precise estimation of the position of the end-effector of a robot using, in addition to the usual measurements of the joint positions, direct measurements of the end-effector position. The estimation performances of extended Kalman filters are compared in applications to a planar two-axis robotic arm with very flexible links. The comparisons shed new light on the dependence of extended Kalman filter estimation performance on the quality of the model of the arm dynamics that the extended Kalman filter operates with.
Fusion Rules for Extended Current Algebras
Ernest Baver; Doron Gepner
1996-01-30T23:59:59.000Z
The initial classification of fusion rules have shown that rational conformal field theory is very limited. In this paper we study the fusion rules of extend ed current algebras. Explicit formulas are given for the S matrix and the fusion rules, based on the full splitting of the fixed point fields. We find that in s ome cases sensible fusion rules are obtained, while in others this procedure lea ds to fractional fusion constants.
Extended Kalman Filter Based Neural Networks Controller For Hot Strip Rolling mill
Moussaoui, A. K. [Electrical Engineering Laboratory of Guelma (LGEG), BP.401, University of Guelma, 24000 (Algeria); Abbassi, H. A.; Bouazza, S. [Universite Badji Mokhtar BP 12--23000-Annaba Algerie (Algeria)
2008-06-12T23:59:59.000Z
The present paper deals with the application of an Extended Kalman filter based adaptive Neural-Network control scheme to improve the performance of a hot strip rolling mill. The suggested Neural Network model was implemented using Bayesian Evidence based training algorithm. The control input was estimated iteratively by an on-line extended Kalman filter updating scheme basing on the inversion of the learned neural networks model. The performance of the controller is evaluated using an accurate model estimated from real rolling mill input/output data, and the usefulness of the suggested method is proved.
EXTENDING THE USEFUL LIFE OF OLDER MASS SPECTROMETERS
Johnson, S.; Cordaro, J.; Holland, M.; Jones, V.
2010-06-17T23:59:59.000Z
Thermal ionization and gas mass spectrometers are widely used across the Department of Energy (DOE) Complex and contractor laboratories. These instruments support critical missions, where high reliability and low measurement uncertainty are essential. A growing number of these mass spectrometers are significantly older than their original design life. The reality is that manufacturers have declared many of the instrument models obsolete, with direct replacement parts and service no longer available. Some of these obsolete models do not have a next generation, commercially available replacement. Today's budget conscious economy demands for the use of creative funds management. Therefore, the ability to refurbish (or upgrade) these valuable analytical tools and extending their useful life is a cost effective option. The Savannah River Site (SRS) has the proven expertise to breathe new life into older mass spectrometers, at a significant cost savings compared to the purchase and installation of new instruments. A twenty-seven year old Finnigan MAT-261{trademark} Thermal Ionization Mass Spectrometer (TIMS), located at the SRS F/H Area Production Support Laboratory, has been successfully refurbished. Engineers from the Savannah River National Laboratory (SRNL) fabricated and installed the new electronics. These engineers also provide continued instrument maintenance services. With electronic component drawings being DOE Property, other DOE Complex laboratories have the option to extend the life of their aged Mass Spectrometers.
Extending Qualitative Modelling for Simulation of TimeDelayed Behaviour
Miguel, Ian
industrial plants is to choose a measured variable and maintain the reÂ quired value of this variable through a process of meaÂ surement, comparison, and adjustment. A time delay between a disturbance in the plant applicable to simulators that enable synchronous tracking. The rest of this paper is arranged as follows
Predicting Protein Folding Kinetics via Temporal Logic Model Checking: Extended
Langmead, Christopher James
-called native configuration. Unfortunately, there is no experimental technology that can provide atomic that the native structure is already known. The computational challenge is to find low energy pathways between in the field of structural biology. The protein's energy landscape is encoded sym- bolically using Binary
Stable Model Theory for Extended RDF Anastasia Analyti1
Analyti, Anastasia
Viegas Dam´asio3 , and Gerd Wagner4 1 Institute of Computer Science, FORTH-ICS, Greece [analyti, antoniou. On the other hand, the inclusion of negative information both in the form of negation-as-failure and explicit, such as the computational concept of negation-as-failure. The RDF(S) recommendation [6] provides the basic constructs
Extending an Algebraic Modeling Language to Support Constraint ...
4er PowerMac G4
2001-04-02T23:59:59.000Z
Department of Industrial Engineering and Management Sciences ..... method for seeking the best objective value over all feasible solutions. Global ...... [15] ILOG, Inc., ILOG OPL Studio 3.0 User's Manual and OPL Studio 3.0 Optimization ... In Principles and Practice of Constraint Programming — CP'99, Joxan Jaffar, ed.,.
Extending a Business Process Modeling Tool with Process Configuration Facilities
Ulm, Universität
is maintained; e.g., oil and wiper fluid are checked. The process ends when handing over the vehicle back
Extending and Condensing the Brazos River Basin Water Availability Model
Wurbs, Ralph; Kim, T.
...................................................................... 19 2.3 SIM Input DIS File for Example 2.1 ..................................................................................... 19 2.4 SIM Input EVA File for Example 2....2 ..................................................................... 31 2.12 Original SIM Input EVA File for Example 2.2 .................................................................... 31 2.13 Original SIM Input DIS File for Example 2.2 ...................................................................... 31 2...
Extending the Capabilities of Component Models for Embedded Systems
Kuz, Ihor
on slower processors, can fit into reduced memory, and can run efficiently in order to conserve energy features and also embeds services for developing extra features in a monolithic design. This is similar
Extending the Petrel Model Builder for Educational and Research Purposes
Nwosa, Obiajulu C
2013-04-11T23:59:59.000Z
optimization and overall reservoir management. Compared to explored reservoirs in the past, current day reservoirs are more complex in extent and structure. As a result, reservoir simulators and algorithms used to represent dynamic systems of flow in porous...
Praxair extending hydrogen pipeline in Southeast Texas
Not Available
1992-08-24T23:59:59.000Z
This paper reports that Praxair Inc., an independent corporation created by the spinoff of Union Carbide Corp.'s Linde division, is extending its high purity hydrogen pipeline system from Channelview, Tex., to Port Arthur, Tex. The 70 mile, 10 in. extension begins at a new pressure swing adsorption (PSA) purification unit next to Lyondell Petrochemical Co.'s Channelview plant. The PSA unit will upgrade hydrogen offgas from Lyondell's methanol plant to 99.99% purity hydrogen. The new line, advancing at a rate of about 1 mile/day, will reach its first customer, Star Enterprise's 250,000 b/d Port Arthur refinery, in September.
Extend the Operating Life of Your Motor
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport in Representative Geologic Media | DepartmentEnergy ExploringPond1988) |Extend
Stefanopoulou, Anna
Experimental Validation of a Lithium-Ion Battery State of Charge Estimation with an Extended Kalman unobservable conditions as discussed in [3] and allow the application of an extended Kalman Filter (EKF) from Kalman Filter (EKF) based on the averaged model and the performance is shown experimentally in a 10 cell
Extended Supersymmetry in Gapped and Superconducting Graphene
V. K. Oikonomou
2015-06-27T23:59:59.000Z
In view of the many quantum field theoretical descriptions of graphene in $2+1$ dimensions, we present another field theoretical feature of graphene, in the presence of defects. Particularly, we shall be interested in gapped graphene in the presence of a domain wall and also for superconducting graphene in the presence of a vortex. As we explicitly demonstrate, the gapped graphene electrons that are localized on the domain wall are associated with four $N=2$ one dimensional supersymmetries, with each pair combining to form an extended $N=4$ supersymmetry with non-trivial topological charges. The case of superconducting graphene is more involved, with the electrons localized on the vortex being associated with $n$ one dimensional supersymmetries, which in turn combine to form an $N=2n$ extended supersymmetry with no-trivial topological charges. As we shall prove, all supersymmetries are unbroken, a feature closely related to the number of the localized fermions and also to the exact form of the associated operators. In addition, the corresponding Witten index is invariant under compact and odd perturbations.
Charged Local Defects in Extended Systems
Schultz, Peter A.
1999-05-25T23:59:59.000Z
The conventional approach to treating charged defects in extended systems in first principles calculations is via the supercell approximation using a neutralizing jellium background charge. I explicitly demonstrate shortcomings of this standard approach and discuss the consequences. Errors in the electrostatic potential surface over the volume of a supercell are shown to be comparable to a band gap energy in semiconductor materials, for cell sizes typically used in first principles simulations. I present an alternate method for eliminating the divergence of the Coulomb potential in supercell calculations of charged defects in extended systems that embodies a correct treatment of the electrostatic potential in the local viciniq of the a charged defect, via a mixed boundary condition approach. I present results of first principles calculations of charged vacancies in NaCl that illustrate the importance of polarization effects once an accurate representation of the local potential is obtained. These polarization effects, poorly captured in small supercells, also impact the energetic on the scale of typical band gap energies.
Extended Supersymmetry in Gapped and Superconducting Graphene
V. K. Oikonomou
2014-11-30T23:59:59.000Z
In view of the many quantum field theoretical descriptions of graphene in $2+1$ dimensions, we present another field theoretical feature of graphene, in the presence of defects. Particularly, we shall be interested in gapped graphene in the presence of a domain wall and also for superconducting graphene in the presence of a vortex. As we explicitly demonstrate, the gapped graphene electrons that are localized on the domain wall are associated with four $N=2$ one dimensional supersymmetries, with each pair combining to form an extended $N=4$ supersymmetry with non-trivial topological charges. The case of superconducting graphene is more involved, with the electrons localized on the vortex being associated with $n$ one dimensional supersymmetries, which in turn combine to form an $N=2n$ extended supersymmetry with no-trivial topological charges. As we shall prove, all supersymmetries are unbroken, a feature closely related to the number of the localized fermions and also to the exact form of the associated operators. In addition, the corresponding Witten index is invariant under compact and odd perturbations.
Curing Cognitive Hiccups: A Defense of The Extended Mind
Clark, Andy
2007-01-01T23:59:59.000Z
Human cognitive processing, according to the Extended Mind Hypothesis may at times extend into the environment surrounding the organism. Such a view should be contrasted with a nearby, (but much more conservative) view ...
Design of Extended Warranties in Supply Chains under Additive Demand
Li, Kumpeg; Mallik, Suman; Chhajed, Dilip
2012-01-01T23:59:59.000Z
We study the design of extended warranties in a supply chain consisting of a manufacturer and an independent retailer. The manufacturer produces a single product and sells it exclusively through the retailer. The extended ...
An Analysis of Two Industrial Assessment Center Extended Assessments
Farouz, H. E.; Gafford, G. D.; Eggebrecht, J. A.; Heffington, W. M.
The Industrial Assessment Center at Texas A&M University extended assessments by spending about two extra days at each of three manufacturing plants. The extended assessments are characterized by use of sophisticated electronic monitoring equipment...
Essays on Extended Service Contracts May 1st, 2008
Sadeh, Norman M.
1 Essays on Extended Service Contracts Tao Chen Defense May 1st, 2008 #12;2 Abstract Extended service contracts have been the major profit generator for many consumer electronics retailers of extended service contracts and how the ESC purchase decisions are related to the product purchase decisions
Extending the GHS Weil Descent Attack No Author Given
Hess, Florian
Extending the GHS Weil Descent Attack No Author Given No Institute Given Abstract. In this paper we extend the Weil descent attack due to Gaudry, Hess and Smart (GHS) to a much larger class of elliptic curves. This extended attack applies to elds of composite degree over F2 . The principle behind
Extending dualities to trialities deepens the foundations of dynamics
Smolin, Lee
2015-01-01T23:59:59.000Z
Dualities are often supposed to be foundational, but they may come into conflict with background independence, because a hidden fixed structures is needed to define the duality transformation. This conflict can be eliminated by extending a duality to a triality. This renders that fixed structure dynamical, while unifying it with the dual variables. To illustrate this, we study matrix models with a cubic action, and show how breaking its natural triality symmetry by imposing different compactifications yields particle mechanics, string theory and Chern-Simons theory. These result from compactifying, respectively, one, two and three dimensions. This may explain the origin of Born's duality between position and momenta operators in quantum theory, as well as some of the the dualities of string theory.
On extended sign-changeable interactions in the dark sector
Mónica Forte
2014-09-23T23:59:59.000Z
We extend the cosmological couplings proposed in Sun et al. and Wei, where they suggested interactions with change of signs along the cosmological evolution. Our extension liberates the changes of sign of the interaction from the deceleration parameter and from the relation of energy densities of the dark sector and considers the presence of non interactive matter. In three cases we obtain the general solutions and the results obtained in models fitted with Hubble's function and SNe Ia data, are analyzed regarding the problem of the cosmological coincidence, the problem of the crisis of the cosmological age and the magnitude of the energy density of dark energy at early universe. Also we graphically study the range of variation of, the actual dark matter density parameter, the effective equation of state of the dark energy and the redshift of transition to the accelerated regimen, generated by variations at order $1\\sigma$ in the coupling parameters.
Extended-length downhole mud motor designed for more power
Krueger, V. [Baker Hughes Inteq, Celle (Germany)
1996-03-25T23:59:59.000Z
A new positive displacement motor (PDM) designed with an extended power section has several advantages over standard mud motors run alone or in tandem. Laboratory tests during design analysis and field tests have indicated these motors can outperform both conventional and coupled mud motors, providing higher penetration rates, longer bit runs, and easier steering. As requirements for improved performance and durability of PDMs have become more demanding, a design team began working on an entirely new motor series. Modern mechanical engineering computation methods were applied for the critical and relevant components of the drilling motor assembly. Design methods and laboratory testing of entire motors, especially for the elastomer stator section, required unique melding of modeling and design evaluation techniques.
Guo, Y.; Keller, J.; Parker, R. G.
2012-06-01T23:59:59.000Z
The dynamics of wind turbine planetary gears with gravity effects are investigated using an extended harmonic balance method that extends established harmonic balance formulations to include simultaneous internal and external excitations. The extended harmonic balance method with arc-length continuation and Floquet theory is applied to a lumped-parameter planetary gear model including gravity, fluctuating mesh stiffness, bearing clearance, and nonlinear tooth contact to obtain the planetary gear dynamic response. The calculated responses compare well with time domain integrated mathematical models and experimental results. Gravity is a fundamental vibration source in wind turbine planetary gears and plays an important role in system dynamics, causing hardening effects induced by tooth wedging and bearing-raceway contacts. Bearing clearance significantly reduces the lowest resonant frequencies of translational modes. Gravity and bearing clearance together lowers the speed at which tooth wedging occurs lower than the resonant frequency.
Extended Forward Sensitivity Analysis for Uncertainty Quantification
Haihua Zhao; Vincent A. Mousseau
2011-09-01T23:59:59.000Z
Verification and validation (V&V) are playing more important roles to quantify uncertainties and realize high fidelity simulations in engineering system analyses, such as transients happened in a complex nuclear reactor system. Traditional V&V in the reactor system analysis focused more on the validation part or did not differentiate verification and validation. The traditional approach to uncertainty quantification is based on a 'black box' approach. The simulation tool is treated as an unknown signal generator, a distribution of inputs according to assumed probability density functions is sent in and the distribution of the outputs is measured and correlated back to the original input distribution. The 'black box' method mixes numerical errors with all other uncertainties. It is also not efficient to perform sensitivity analysis. Contrary to the 'black box' method, a more efficient sensitivity approach can take advantage of intimate knowledge of the simulation code. In these types of approaches equations for the propagation of uncertainty are constructed and the sensitivities are directly solved for as variables in the simulation. This paper presents the forward sensitivity analysis as a method to help uncertainty qualification. By including time step and potentially spatial step as special sensitivity parameters, the forward sensitivity method is extended as one method to quantify numerical errors. Note that by integrating local truncation errors over the whole system through the forward sensitivity analysis process, the generated time step and spatial step sensitivity information reflect global numerical errors. The discretization errors can be systematically compared against uncertainties due to other physical parameters. This extension makes the forward sensitivity method a much more powerful tool to help uncertainty qualification. By knowing the relative sensitivity of time and space steps with other interested physical parameters, the simulation is allowed to run at optimized time and space steps without affecting the confidence of the physical parameter sensitivity results. The time and space steps forward sensitivity analysis method can also replace the traditional time step and grid convergence study with much less computational cost. Several well defined benchmark problems with manufactured solutions are utilized to demonstrate the extended forward sensitivity analysis method. All the physical solutions, parameter sensitivity solutions, even the time step sensitivity in one case, have analytical forms, which allows the verification to be performed in the strictest sense.
The Photophysics of the Carrier of Extended Red Emission
Tracy L. Smith; Adolf N. Witt
2001-09-26T23:59:59.000Z
Interstellar dust contains a component which reveals its presence by emitting a broad, unstructured band of light in the 540 to 950 nm wavelength range, referred to as Extended Red Emission (ERE). The presence of interstellar dust and ultraviolet photons are two necessary conditions for ERE to occur. This is the basis for suggestions which attribute ERE to an interstellar dust component capable of photoluminescence. In this study, we have collected all published ERE observations with absolute-calibrated spectra for interstellar environments, where the density of ultraviolet photons can be estimated reliably. In each case, we determined the band-integrated ERE intensity, the wavelength of peak emission in the ERE band, and the efficiency with which absorbed ultraviolet photons are contributing to the ERE. The data show that radiation is not only driving the ERE, as expected for a photoluminescence process, but is modifying the ERE carrier as manifested by a systematic increase in the ERE band's peak wavelength and a general decrease in the photon conversion efficiency with increasing densities of the prevailing exciting radiation. The overall spectral characteristics of the ERE and the observed high quantum efficiency of the ERE process are currently best matched by the recently proposed silicon nanoparticle (SNP) model. Using the experimentally established fact that ionization of semiconductor nanoparticles quenches their photoluminescence, we proceeded to test the SNP model by developing a quantitative model for the excitation and ionization equilibrium of SNPs under interstellar conditions for a wide range of radiation field densities.
Extending the nuclear chart by continuum: from oxygen to titanium
Qu, Xiaoying; Zhang, Shuangquan; Zhao, Pengwei; Shin, Ik Jae; Lim, Yeunhwan; Kim, Youngman; Meng, Jie
2013-01-01T23:59:59.000Z
Nuclear masses ranging from O to Ti isotopes are systematically investigated with relativistic continuum Hartree-Bogoliubov (RCHB) theory, which can provide a proper treatment of pairing correlations in the presence of the continuum. From O to Ti isotopes, there are 402 nuclei predicted to be bound by the density functional PC-PK1. For the 234 nuclei with mass measured, the root mean square (rms) deviation is 2.23 MeV. It is found that the proton drip-lines predicted with various mass models are roughly the same and basically agree with the observation. The neutron drip-lines predicted, however, are quite different. Due to the continuum couplings, the neutron drip-line nuclei predicted are extended further neutron-rich than other mass models. By comparison with finite-range droplet model (FRDM), the neutron drip-line nucleus predicted by RCHB theory has respectively 2(O), 10(Ne), 10(Na), 6(Mg), 8(Al), 6(Si), 8(P), 6(S), 14(K), 10(Ca), 10(Sc), and 12(Ti) more neutrons.
Extending the Eikonal Approximation to Low Energy
Pierre Capel; Tokuro Fukui; Kazuyuki Ogata
2014-11-21T23:59:59.000Z
E-CDCC and DEA, two eikonal-based reaction models are compared to CDCC at low energy (e.g. 20AMeV) to study their behaviour in the regime at which the eikonal approximation is supposed to fail. We confirm that these models lack the Coulomb deflection of the projectile by the target. We show that a hybrid model, built on the CDCC framework at low angular momenta and the eikonal approximation at larger angular momenta gives a perfect agreement with CDCC. An empirical shift in impact parameter can also be used reliably to simulate this missing Coulomb deflection.
The expressiveness of CSP extended by priority A.W. Roscoe
Oxford, University of
The expressiveness of CSP extended by priority (draft) A.W. Roscoe Oxford University Department of Computer Science October 17, 2014 Abstract In previous work [27, 26] the author defined a notion of CSP with such an operational semantics can be translated into CSP and therefore has a semantics in every model of CSP
Please visit our web site: w3.pppl.gov/CEMM The Center for Extended
Please visit our web site: w3.pppl.gov/CEMM The Center for Extended Magnetohydrodynamic Modeling APDEC #12;Please visit our web site: w3.pppl.gov/CEMM We have had (and are having) a very productive, etc.), and many journal papers #12;Please visit our web site: w3.pppl.gov/CEMM All the presentations
X-ray imaging of extended magnetic domain walls in Ni80Fe20 wires
Basu, S.; Fry, P. W.; Allwood, D. A.; Bryan, M. T.; Gibbs, M. R. J.; Schrefl, T.; Im, M.-Y.; Fischer, P.
2009-06-20T23:59:59.000Z
We have used magnetic transmission X-ray microscopy to image magnetization configurations in 700 nm wide Ni{sub 80}Fe{sub 20} planar wires attached to 'nucleation' pads Domain walls were observed to inject only across half of the wire width but extend to several micrometers in length. Magnetostatic interactions with adjacent wires caused further unusual domain wall behavior. Micromagnetic modeling suggests the extended walls have Neel-like structure along their length and indicates weaker exchange coupling than is often assumed. These observations explain previous measurements of domain wall injection and demonstrate that magnetic domain walls in larger nanowires cannot always be considered as localized entities.
Extending Sensor Calibration Intervals in Nuclear Power Plants
Coble, Jamie B.; Meyer, Ryan M.; Ramuhalli, Pradeep; Bond, Leonard J.; Shumaker, Brent; Hashemian, Hash
2012-11-15T23:59:59.000Z
Currently in the USA, sensor recalibration is required at every refueling outage, and it has emerged as a critical path item for shortening outage duration. International application of calibration monitoring, such as at the Sizewell B plant in UK, has shown that sensors may operate for eight years, or longer, within calibration tolerances. Online monitoring can be employed to identify those sensors which require calibration, allowing for calibration of only those sensors which need it. The US NRC accepted the general concept of online monitoring for sensor calibration monitoring in 2000, but no plants have been granted the necessary license amendment to apply it. This project addresses key issues in advanced recalibration methodologies and provides the science base to enable adoption of best practices for applying online monitoring, resulting in a public domain standardized methodology for sensor calibration interval extension. Research to develop this methodology will focus on three key areas: (1) quantification of uncertainty in modeling techniques used for calibration monitoring, with a particular focus on non-redundant sensor models; (2) accurate determination of acceptance criteria and quantification of the effect of acceptance criteria variability on system performance; and (3) the use of virtual sensor estimates to replace identified faulty sensors to extend operation to the next convenient maintenance opportunity.
Statefinder hierarchy exploration of the extended Ricci dark energy
Yu, Fei; Zhang, Jing-Fei; Zhang, Xin
2015-01-01T23:59:59.000Z
We apply the statefinder hierarchy plus the fractional growth parameter to explore the extended Ricci dark energy (ERDE) model, in which there are two independent coefficients $\\alpha$ and $\\beta$. By adjusting them, we plot evolution trajectories of some typical parameters, including Hubble expansion rate $E$, deceleration parameter $q$, the third and fourth order hierarchy $S_3^{(1)}$ and $S_4^{(1)}$ and fractional growth parameter $\\epsilon$, respectively, as well as several combinations of them. For the case of variable $\\alpha$ and constant $\\beta$, in the low-redshift region the evolution trajectories of $E$ are in high degeneracy and that of $q$ separate somewhat. However, the $\\Lambda$CDM model is confounded with ERDE in both of these two cases. $S_3^{(1)}$ and $S_4^{(1)}$, especially the former, perform much better. They can differentiate well only varieties of cases within ERDE except $\\Lambda$CDM in the low-redshift region. For high-redshift region, combinations $\\{S_n^{(1)},\\epsilon\\}$ can break t...
Extending the Higgs sector: an extra singlet
Godunov, S I; Vysotsky, M I; Zhemchugov, E V
2015-01-01T23:59:59.000Z
An extension of the Standard Model with an additional Higgs singlet is analyzed. Bounds on singlet admixture in 125 GeV h boson from electroweak radiative corrections and data on h production and decays are obtained. Possibility of double h production enhancement at 14 TeV LHC due to heavy higgs contribution is considered.
Extending Bass for Improved New Product Forecasting
Wu, David
for new products is increasingly difficult as the technology treadmill drives product lifecycles shorter and shorter. The task is even more challenging for electronic goods, where product lifecycles are measured that emerges during the product lifecycle. We describe a successful implementation of this model at Intel
Upper crustal faulting in an obliquely extending orogen, structural...
faulting in an obliquely extending orogen, structural control on permeability and production in the Coso Geothermal Field, eastern California Jump to: navigation, search OpenEI...
Extending the Temperature Range of Electric Submersible Pumps...
Broader source: Energy.gov (indexed) [DOE]
0 4.4.5 Extending the Temperature Range of Electric Submersible Pumps to 338 C - Hotline IV - High-temperature ESP Presentation Number: 019 Investigator: Dhruva, Brindesh...
Multi-unit Auctions with Unknown Supply [Extended Abstract
Saberi, Amin
Multi-unit Auctions with Unknown Supply [Extended Abstract] Mohammad Mahdian Microsoft Research Redmond, WA, USA mahdian@microsoft.com Amin Saberi Stanford University Stanford, CA, USA saberi
Energy Department And University of California Extend Management...
National Nuclear Security Administration (NNSA)
Apply for Our Jobs Our Jobs Working at NNSA Blog Home Media Room Press Releases Energy Department And University of California Extend ... Energy Department And University of...
Microsoft BPA proposal extends Port Townsend Paper contract nine...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
is adopted. BPA is proposing to amend Port Townsend Paper Company's existing power purchase contract extending the term of the contract until September 2022,...
Uranium Leasing Program Draft PEIS Public Comment Period Extended...
Broader source: Energy.gov (indexed) [DOE]
Uranium Leasing Program Draft PEIS Public Comment Period Extended to May 31, 2013 Draft ULPEIS comment extension community notification041813 (3).pdf More Documents & Publications...
Upper crustal structure of an obliquely extending orogen, central...
eastern California Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Upper crustal structure of an obliquely extending orogen, central...
Effect of different extenders and storage temperatures on sperm viability
Zaragoza, Universidad de
a split-sample technique, in four different extenders: one for milk (Mi), one for sodium citrate (Na better than both the sodium citrate- and the milk-based extender did when liquid ram semen was stored up to ram spermatozoa and impair fertility [3±6], fresh diluted and cooled ram semen might be an alternative
Extended Kalman Filter Using a Kernel Recursive Least Squares Observer
Slatton, Clint
Extended Kalman Filter Using a Kernel Recursive Least Squares Observer Pingping Zhu, Badong Chen estimation problem combining the extended Kalman filter (EKF) with a kernel recursive least squares (KRLS Kalman filter, EKF and KRLS algorithms. Results demonstrate that the performance of the EKF
Extending Greenland temperature records into the late eighteenth century
Feigon, Brooke
Extending Greenland temperature records into the late eighteenth century B. M. Vinther,1 K. K records for Greenland reach back to the late nineteenth century at a few sites. Combining early record back to the year 1784. The new extended Greenland temperature record is 9% incomplete. There are
EXTENDED SIMPLE COLORED PETRI NETS: A TOOL FOR PLANT SIMULATION
Coglio, Alessandro
EXTENDED SIMPLE COLORED PETRI NETS: A TOOL FOR PLANT SIMULATION Antonio Camurri and Alessandro, IÂ16145 Genova, Italy {music, tokamak}@dist.unige.it ABSTRACT Extended Simple Colored Petri Nets (ESCPÂnets) are a new class of HighÂlevel Petri Nets conceived as a good tradeÂoff between Petri Nets (PÂnets
1-pin blanket mockup: Results of the extended test campaign
Ferrari, M.; Talarico, C. [EURATOM-ENEA, Frascati (Italy); Furrer, M.; Simbolotti, G. [ENEA, S. Maria in Galeria (Italy)
1996-12-31T23:59:59.000Z
Following a preliminary test campaign (200 thermal cycles) on a solid breeder blanket mockup, an extended test campaign (about 1000 thermal cycles) has been carried out by ENEA. The duration of the test campaign represents a significant fraction of the blanket module lifetime in the ITER device. In particular, these out-of-pile experiments have been performed in order to test (both functional and endurance testing) the thermal-hydraulic and thermo-mechanical performance of a water cooled breeder-in-tube blanket mockup (1-PIN) using Li{sub 2}ZrO{sub 3} pebbles as a breeder material. The test campaign has been completed and the resulting data concerning thermal and thermal-hydraulic parameters have been elaborated and analyzed by means of a comparison with theoretical predictions based on a proper thermal-hydraulic model. The post test examination of the pebbles is in progress in order to investigate the thermo-mechanical behavior of the breeder material under cycling. The paper deals with the first part of the results. 6 refs., 11 figs., 1 tab.
Extended law of corresponding states for protein solutions
Florian Platten; Néstor E. Valadez-Pérez; Ramón Castañeda-Priego; Stefan U. Egelhaaf
2015-03-03T23:59:59.000Z
The so-called extended law of corresponding states, as proposed by Noro and Frenkel [J. Chem. Phys. 113, 2941 (2000)], involves a mapping of the phase behaviors of systems with short-range attractive interactions. While it has already extensively been applied to various model potentials, here we test its applicability to protein solutions with their complex interactions. We successfully map their experimentally determined metastable gas--liquid binodals, as available in the literature, to the binodals of short-range square-well fluids, as determined by previous as well as new Monte Carlo simulations. This is achieved by representing the binodals as a function of the temperature scaled with the critical temperature (or as a function of the reduced second virial coefficient) and the concentration scaled by the cube of an effective particle diameter, where the scalings take into account the attractive and repulsive contributions to the interaction potential, respectively. The scaled binodals of the protein solutions coincide with simulation data of the adhesive hard-sphere fluid. Furthermore, once the repulsive contributions are taken into account by the effective particle diameter, the temperature dependence of the reduced second virial coefficients follows a master curve that corresponds to a linear temperature dependence of the depth of the square-well potential. We moreover demonstrate that, based on this approach and cloud-point measurements only, second virial coefficients can be estimated, which we show to agree with values determined by light scattering or by DLVO-based calculations.
Tappert, Charles
as the application of scientific knowledge, especially in industry and business. Ray Kurzweil [5] presented which must be considered when extending the life of a legacy system in light of the Technology Life Obsolescence Surplus Retire Support Antiquity Table 2. Comparison of Technology Life Cycle Models The models
Chandra Observations of ULIRGs: Extended Hot Gas Halos in Merging Galaxies
Z. Y. Huo; X. Y. Xia; S. J. Xue; S. Mao; Z. G. Deng
2004-05-09T23:59:59.000Z
We study the properties of hot gaseous halos in 10 nearby ultraluminous IRAS galaxies observed with the ACIS instrument on board Chandra. For all sample galaxies, diffuse soft X-ray emissions are found within ~10 kpc of the central region; their spectra are well fitted by a MEKAL model plus emission lines from alpha-elements and other ions. The temperature of the hot gas is about 0.7 keV and metallicity is about 1 solar. Outside the central region, extended hot gaseous halos are found for nine out of the ten ULIRGs. Most spectra of these extended halos can be fitted with a MEKAL model with a temperature of about 0.6 keV and a low metallicity (~ 0.1 solar). We discuss the implications of our results on the origin of X-ray halos in elliptical galaxies and the feedback processes associated with starbursts.
The Omniscient Garbage Collector: a Resource Analysis Framework (extended abstract)
Paris-Sud XI, Université de
The Omniscient Garbage Collector: a Resource Analysis Framework (extended abstract) Aurélien point of view, we develop the omniscient garbage collector (OGC), which decides precisely when the resource index requires an omniscient garbage collector, a NP-complete problem tightly connected
Zerocash: Decentralized Anonymous Payments from Bitcoin (extended version)
Zerocash: Decentralized Anonymous Payments from Bitcoin (extended version) Eli Ben Bitcoin is the first digital currency to see widespread adoption. Although payments are conducted between pseudonyms, Bitcoin cannot offer strong privacy guarantees: payment transactions are recorded in a public
Assessment for the extended uses of historic structures
Brune, Geoffrey John
1996-01-01T23:59:59.000Z
This thesis constructs a tool for assessing the interventions required to extend the use of historic properties in historic districts. The continued use of these structures, either historically noteworthy or important as contributing to the context...
Accelerating the development of complex products in extended enterprises
Dawson, Benjamin Alan
2011-01-01T23:59:59.000Z
This thesis examines strategies to accelerate product development in a large commercial aerospace program structured as an extended enterprise where first and second tier suppliers perform most of the detailed product ...
Assessment for the extended uses of historic structures
Brune, Geoffrey John
1996-01-01T23:59:59.000Z
This thesis constructs a tool for assessing the interventions required to extend the use of historic properties in historic districts. The continued use of these structures, either historically noteworthy or important as contributing to the context...
On the Hardness of Optimal Auctions (Extended Abstract)
Saberi, Amin
On the Hardness of Optimal Auctions (Extended Abstract) Amir Ronen #3; Amin Saberi y Abstract We Berkeley. Email: saberi@cc.gatech.edu. problem which is perhaps the most basic in optimal auction design
Extending STI for Demanding Hard-Real-Time Systems Deepaksrivats
Dean, Alexander G.
Extending STI for Demanding Hard-Real-Time Systems Benjamin Welch Shobhit Kanaujia Adarsh Seetharam to implement given functionality on a generic processor, saving money, power, and energy and simplifying design
Energy Flow in Extended Gradient Partial Differential Equations
Energy Flow in Extended Gradient Partial Differential Equations Th. Gallay S. Slijepâ??atiment 425 BijeniÅ¸cka 30 FÂ91405 Orsay, France 10000 Zagreb, Croatia Thierry.Gallay@math.uÂpsud.fr slijepce
New Development of Self-Interaction Corrected DFT for Extended...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
DFT-SIC calculation can be carried out efficiently even for extended systems. Using this new development the formation energies of defects in 3C-SiC were calculated and compared...
Accuracy of Reduced and Extended Thin-Wire Kernels
Burke, G J
2008-11-24T23:59:59.000Z
Some results are presented comparing the accuracy of the reduced thin-wire kernel and an extended kernel with exact integration of the 1/R term of the Green's function and results are shown for simple wire structures.
Quantization of extended SchrÄodinger-Virasoro Lie algebra
Lamei Yuan; Liji Zhou
2010-04-21T23:59:59.000Z
In present paper, we quantize the extended Schr\\"Aodinger-Virasoro Lie algebra in char- acteristic zero with its Lie bialgebra structures classified by Yuan-Wu-Xu, and get a new Hopf algebra.
Generalized covariation and extended Fukushima decompositions for Banach valued processes.
Paris-Sud XI, Université de
Generalized covariation and extended Fukushima decompositions for Banach valued processes corresponding results when B = C([-, 0]) and X = X(·). This will consitute a significant Fukushima decomposition random variables, Malliavin calculus, Generalized Fukushima decomposition. LUISS Guido Carli - Libera
Kick circulation analysis for extended reach and horizontal wells
Long, Maximilian Mark
2005-02-17T23:59:59.000Z
KICK CIRCULATION ANALYSIS FOR EXTENDED-REACH AND HORIZONTAL WELLS A Thesis by MAXIMILIAN M. LONG 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 December 2004 Major Subject: Petroleum Engineering KICK CIRCULATION ANALYSIS FOR EXTENDED-REACH AND HORIZONTAL WELLS A Thesis by MAXIMILIAN M. LONG Submitted...
Extended cage adjustable speed electric motors and drive packages
Hsu, John S. (Oak Ridge, TN)
1999-01-01T23:59:59.000Z
The rotor cage of a motor is extended, a second stator is coupled to this extended rotor cage, and the windings have the same number of poles. The motor torque and speed can be controlled by either injecting energy into or extracting energy out from the rotor cage. The motor produces less harmonics than existing doubly-fed motors. Consequently, a new type of low cost, high efficiency drive is produced.
Using Double-peaked Supernova Light Curves to Study Extended Material
Piro, Anthony L
2015-01-01T23:59:59.000Z
Extended material at large radii surrounding a supernova can result in a double-peaked light curve when the material is sufficiently massive that the supernova shock continues to propagate into it and sufficiently extended that it produces a bright first peak. Such material can be the leftover, low-mass envelope of a star that has been highly stripped, the mass associated with a wind, or perhaps mass surrounding the progenitor due to some type of pre-explosion activity. I summarize the conditions necessary for such a light curve to occur, describe what can be learned about the extended material from the light curve shape, and provide a semi-analytic model for fitting the first peak in these double-peaked supernovae. This is applied to the specific case of a Type Ic super-luminous supernova, LSQ14bdq. The mass in the extended material around this explosion's progenitor is measured to be small, ~0.2-0.5 Msun. The radius of this material must be >500 Rsun, but it is difficult to constrain due to a degeneracy bet...
Extended Emission of Short Gamma-Ray Bursts
Lin Lin; En-Wei Liang; Bin-Bin Zhang; Shuang Nan Zhang
2008-09-10T23:59:59.000Z
Preliminary results of our analysis on the extended emission of short/medium duration GRBs observed with Swift/BAT are presented. The Bayesian blocks algorithm is used to analyze the burst durations and the temporal structure of the lightcurves in different energy bands. We show here the results of three bursts (GRBs 050724, 061006 and 070714B) that have a prominent soft extended emission component in our sample. The extended emission of these bursts is a continuous, flickering-liked component, lasting $\\sim 100$ seconds post the GRB trigger at 15-25 keV bands. Without considering this component, the three bursts are classified as short GRBs, with $T_{90}=2\\sim 3$ seconds. GRB 060614 has an emission component similar to the extended emission, but this component has pulse-liked structure, possibly indicating that this emission component is different from that observed in GRBs 050724, 061006, and 070714B. Further analysis on the spectral evolution behavior of the extended emission component is on going.
Marginal Extended Perturbations in Two Dimensions and Gap-Exponent Relations
L. Turban; B. Berche
1997-09-11T23:59:59.000Z
The most general form of a marginal extended perturbation in a two-dimensional system is deduced from scaling considerations. It includes as particular cases extended perturbations decaying either from a surface, a line or a point for which exact results have been previously obtained. The first-order corrections to the local exponents, which are functions of the amplitude of the defect, are deduced from a perturbation expansion of the two-point correlation functions. Assuming covariance under conformal transformation, the perturbed system is mapped onto a cylinder. Working in the Hamiltonian limit, the first-order corrections to the lowest gaps are calculated for the Ising model. The results confirm the validity of the gap-exponent relations for the perturbed system.
Methods for extending the storage life of fresh beef
Motycka, Robert Ray
1973-01-01T23:59:59.000Z
MI'I", !ODS }' OR Eg"' ' ll Ii&': TOP 4 Thesis ROBFRT RAY MOTYCX. . ", Submitted to the Graduate College of Texas A&N Universi. ty i. n partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1973 Major Subject...: Neat Science METHODS FOR EXTENDING THE STORAGE LIFE OF FRESH BEEF A Thesis by ROBERT RAY MOTYCKA Approved as to style and content by: (Co-Chairman df Conmrfttee) /y (Head of Depart ent) (Member) December 1973 ABSTRACT Methods for Extending...
Solid low level waste forms and extended storage
Kohout, R. [R. Kohout & Associates, Ltd., Toronto, Ontario (Canada)
1995-11-01T23:59:59.000Z
This paper presents regulatory, technical, and economic aspects of selecting solid waste forms for the extended on-site storage of power plant low level wastes (LLW) in the United States. The author explains current uncertainties and disposal site shortages, defines power plant waste types, addresses regulatory requirements for disposal, discusses basic waste form storage considerations, outlines possible strategies for the management of individual waste types, and offers methodological steps for selecting a waste form for extended storage. Broader issues closely associated with waste form selection are also presented.
Calibrating Multi-machine Power System Parameters with the Extended Kalman Filter
Kalsi, Karanjit; Sun, Yannan; Huang, Zhenyu; Du, Pengwei; Diao, Ruisheng; Anderson, Kevin K.; Li, Yulan; Lee, Barry
2012-07-24T23:59:59.000Z
Large-scale renewable resources and novel smart-grid technologies continue to increase the complexity of power systems. As power systems continue to become more complex, accurate modeling for planning and operation becomes a necessity. Inaccurate system models would result in an unreliable assessment of system security conditions and could cause large-scale blackouts. This motivates the need for model parameter calibration, since some or all of the model parameters could be unknown or inaccurate. In this paper, the extended Kalman filter is used to calibrate the parameters of a multi-machine power system. The calibration performance is tested under varying fault locations, parameter errors and measurement noise giving an insight into how many generators and which generators could be difficult to calibrate.
Stephens, Jacqueline
INTRODUCTION Pavement preservation is an approach in enhancing pavement performance using a set of practices that extends the life of the pavement and improves safety and ride quality. According to theWorld Bank's Pavement Deterioration Model, the cost of returning a pavement to good condition after
Marcus, Philip S.
Oval BA (and the Great Red Spot) extend down to a supersolar water cloud layer in Jupiter in Jupiter's troposphere, with stable layers near cloud bases [4,6,7]. We use these two results to determine horizontal band in Fig. 2 shows that vortex- model derived static stability (white bars) is consistent
EXTENDING METHODS FOR MODELING HETEROGENEITY IN NEST-SURVIVAL DATA USING GENERALIZED MIXED MODELS
Rotella, Jay J.
condiciones covariantes de interés. También condujimos simulaciones Monte Carlo para evaluar el desempeño de
Voice Quality Evaluation for Wireless Transmission with ROHC (extended version
Reisslein, Martin
(reduction in header and total packet size), the voice quality, and the delay jitter. Importantly, we employ1 Voice Quality Evaluation for Wireless Transmission with ROHC (extended version and software code encoded voice with ROHC over a wireless link. We first present a tutorial on voice quality evaluation. We
On extendability of group actions on compact Riemann surfaces
Conder, Marston
of such groups. The associated signatures appear in Table 1 below, the #12;rst eight corresponding to normalOn extendability of group actions on compact Riemann surfaces E. Bujalance #3; , F.J. Cirre y , M.D.E. Conder z 28 September 2001 Abstract The question of whether a given group G which acts faithfully
New Blind Signatures Equivalent to Factorization (Extended Abstract)
Pointcheval, David
New Blind Signatures Equivalent to Factorization (Extended Abstract) David Pointcheval Jacques Stern Abstract In this paper, we present new blind signature schemes based on the factorization problem. They are the first blind sig- nature schemes proved secure relatively to factorization. By security, we mean
Optimal Fractal Coding is NP-Hard1 (Extended Abstract)
Reiterer, Harald
Optimal Fractal Coding is NP-Hard1 (Extended Abstract) Matthias Ruhl, Hannes Hartenstein Institut f,hartenst@informatik.uni-freiburg.de Abstract In fractal compression a signal is encoded by the parameters of a contractive trans- formation whose fixed point (attractor) is an approximation of the original data. Thus fractal coding can
EXTENDING THE PREDICTION OF THE THERMODYNAMIC PROPERTIES OF CLAY
Paris-Sud XI, Université de
EXTENDING THE PREDICTION OF THE THERMODYNAMIC PROPERTIES OF CLAY MINERALS TO THE TRAPPING OF TRACE The thermodynamic properties of clay minerals, which control the stability of these minerals in solution, are still are parameterised using a given set of minerals. For clay minerals, the latter are mainly composed by Si, Al, Fe
Cyber Security via Minority Games with Epistatic Signaling (Extended Abstract)
Mishra, Bud
Cyber Security via Minority Games with Epistatic Signaling (Extended Abstract) W. Casey, L. Metcalf occurs when deceptions are employed in order to breach the security of the system, thus making the entire profiles (e.g., the distribution of players employing various kinds of vulnerability and threat predictions
Kalman and Extended Kalman Filters: Concept, Derivation and Properties
Ribeiro,Isabel
Kalman and Extended Kalman Filters: Concept, Derivation and Properties Maria Isabel Ribeiro for Gaussian Random Vectors . . . . . . . . . . 12 4 The Kalman Filter 14 4.1 Kalman Filter dynamics . . . . . . . . . . . . . . . . . . . . . . . 15 4.2 One-step ahead prediction dynamics . . . . . . . . . . . . . . . . 22 4.3 Kalman filter
Evaluation of the Technical Basis for Extended Dry Storage and
-- Executive Summary U.S. Nuclear Waste Technical Review Board December 2010 #12;U.S.U.S. Nuclear Waste Technical Review Board Authors This report was prepared for the U.S. Nuclear Waste Technical Review Board.NWTRB.GOV ii #12;Extended Dry Storage and Transportation of Used Nuclear Fuel U.S. Nuclear Waste Technical
Extending the analysis of the FlipIt game
Rossides, Michalis
2013-01-01T23:59:59.000Z
In this thesis, we extend the game theoretical analysis of the FlipIt game¹. The game was first articulated and analyzed by Marten van Dijk, Ari Juels, Alina Oprea and Ronald L. Rivest. FlipIt (or otherwise The Game of ...
TPA#1573154.02 Extending the Squeak Virtual Machine
Ducasse, Stéphane
TPA#1573154.02 Extending the Squeak Virtual Machine Andrew C. Greenberg NetWolves Technology not otherwise possible without an extension. Squeaking out more speed Squeak programs are not compiled to native permitting a programmer to focus energies on refining only small portions of the code. Using a Squeak
An extended Dirac equation in noncommutative space-time
R. Vilela Mendes
2015-02-01T23:59:59.000Z
Stabilizing, by deformation, the algebra of relativistic quantum mechanics a non-commutative space-time geometry is obtained. The exterior algebra of this geometry leads to an extended massless Dirac equation which has both a massless and a large mass solution. The nature of the solutions is discussed, as well as the effects of coupling the two solutions.
An extended Dirac equation in noncommutative space-time
Mendes, R Vilela
2015-01-01T23:59:59.000Z
Stabilizing, by deformation, the algebra of relativistic quantum mechanics a non-commutative space-time geometry is obtained. The exterior algebra of this geometry leads to an extended massless Dirac equation which has both a massless and a large mass solution. The nature of the solutions is discussed, as well as the effects of coupling the two solutions.
Browser Interfaces and Extended Validation SSL Certificates: An Empirical Study
Van Oorschot, Paul
Browser Interfaces and Extended Validation SSL Certificates: An Empirical Study Robert Biddle provided by SSL certificates and browser interfaces in the face of var- ious attacks. As one response, basic SSL server certificates are being demoted to second-class status in conjunction
The Description Logic ALCN HR+ Extended with Concrete Domains
Moeller, Ralf
The Description Logic ALCN HR+ Extended with Concrete Domains: A Practically Motivated Approach, role hierarchies, transitively closed roles, generalized concept inclusions, and concrete domains. As in other languages based on concrete domains (e.g. ALC(D)) a so-called ex- istential predicate restriction
The Description Logic ALCNHR + Extended with Concrete Domains
Haarslev, Volker
The Description Logic ALCNHR + Extended with Concrete Domains: A Practically Motivated Approach restrictions, role hierarchies, transitively closed roles, generalized concept inclusions, and concrete domains. As in other languages based on concrete domains (e.g. ALC(D)) a soÂcalled exÂ istential predicate restriction
Extending Plan Inference Techniques to Recognize Intentions in Information Graphics
Carberry, Sandra
Extending Plan Inference Techniques to Recognize Intentions in Information Graphics Stephanie Elzer information graphics. Our work is part of a larger project to de- velop an interactive natural language system graphics. 1 Introduction The amount of information available electronically has increased dramatically over
EXTENDING THE DEFINITION OF ENTROPY TO NONEQUILIBRIUM STEADY STATES.
## of #. Our definition is based on energy exchanged, uses the microscopic dynamics of the system, and agreesEXTENDING THE DEFINITION OF ENTROPY TO NONEQUILIBRIUM STEADY STATES. by David Ruelle* Abstract. We forces # and maintained at fixed kinetic energy (HooverÂEvans isokinetic thermostat). We assume
AN EXTENDED CLASS OF NONLINEAR CONJUGATE GRADIENT METHODS \\Lambda
Yuan, Ya-xiang
AN EXTENDED CLASS OF NONLINEAR CONJUGATE GRADIENT METHODS \\Lambda Y. H. Dai and Y. Yuan State Key 100080, P. R. China. Email: dyh,yyx@lsec.cc.ac.cn Abstract Conjugate gradient methods are very important be analyzed uniformly, conjugate gradient methods are often analyzed individually. Recently, Dai and Yuan
Extending the Cell SPE with Energy Efficient Branch Prediction
Kuzmanov, Georgi
Extending the Cell SPE with Energy Efficient Branch Prediction Martijn Briejer1 , Cor Meenderinck1 , and Ben Juurlink2 1 Delft University of Technology, Delft, the Netherlands cor@ce.et.tudelft.nl 2 Technische UniversitÂ¨at Berlin, Berlin, Germany juurlink@cs.tu-berlin.de Abstract. Energy-efficient dynamic
On the algebraization of valuation semantics (extended abstract)
Lisboa, Universidade Técnica de
On the algebraization of valuation semantics (extended abstract) Carlos Caleiro Ricardo Gon-Tarski method. Nevertheless, many interesting logics fall out of the scope of this approach. It is the case to , that represents the valuation map. Moreover, the two-sorted signature 2 will have the operations of on sort
EXTENDING UFDS TO PIDS WITHOUT ADDING UNITS KEITH A. KEARNES
Kearnes, Keith A.
EXTENDING UFDS TO PIDS WITHOUT ADDING UNITS KEITH A. KEARNES ABSTRACT. If U is a UFD, then there is a PID P containing U that has the same unit group as U. Moreover, P can be taken so that its field there is a PID P such that (i) P is a proper subring of the real numbers, (ii) P properly contains the ring
Merging DBMs E#ciently --Extended Abstract Alexandre David 1
David, Alexandre
Merging DBMs E#ciently -- Extended Abstract Alexandre David 1 Department of Computer Science to reduce the number of DBMs in federations by merging them. Federations are unions of DBMs and are used to represent nonÂconvex zones. Inclusion checking between DBMs is a limited technique to reduce the size
Merging DBMs Efficiently Extended Abstract Alexandre David1
David, Alexandre
Merging DBMs Efficiently Â Extended Abstract Alexandre David1 Department of Computer Science algorithms to reduce the number of DBMs in federations by merging them. Federations are unions of DBMs and are used to represent non-convex zones. Inclusion checking between DBMs is a limited technique to reduce
Composting Successes and Failures Extending the Growing Season Workshop
Amin, S. Massoud
3/18/2014 1 Composting Successes and Failures Extending the Growing Season Workshop LaMoine Nickel University of MN SWROC March 12, 2014 Beginning of compost process 9/6/2013 Finished compost product 11/19/2013 What is Composting Composting is a biological process in which microorganisms convert organic
CREATIVE CONCEPTUAL DESIGN: EXTENDING THE SCOPE BY INFUSED DESIGN
Shai, Offer
1 CREATIVE CONCEPTUAL DESIGN: EXTENDING THE SCOPE BY INFUSED DESIGN Offer Shai School of Mechanical infused design that guarantees generating design solutions by transforming systems and methods from remote. This process is partially supported by a computer tool. We describe the method of infused design and illustrate
Western Michigan University -Extended University Programs How to Get Started
de Doncker, Elise
Western Michigan University - Extended University Programs How to Get Started Interested in takingThe first toWestern Michigan University, Office of Admissions,1903W. Michigan Ave,Kalamazoo,MI 49008Western Michigan University,Office of Admissions,1903W.Michigan Ave, Kalamazoo,MI 49008-5211;the other
US Biofuels Baseline and impact of extending the
Noble, James S.
June 2011 US Biofuels Baseline and impact of extending the $0.45 ethanol blenders baseline projections for agricultural and biofuel markets.1 That baseline assumed current biofuel policy for cellulosic biofuels was assumed to expire at the end of 2012. This report compares a slightly modified
Prediction Games in Infinitely Rich Worlds [Extended Abstract
Madani, Omid
Prediction Games in Infinitely Rich Worlds [Extended Abstract] Omid Madani madani prediction games may make this massive learning possible. In this paper, we describe prediction games potential of prediction games is in pointing to ways of achieving powerful large-scale learning without
Rational Secret Sharing and Multiparty Computation: Extended Abstract
Fiat, Amos
Rational Secret Sharing and Multiparty Computation: Extended Abstract Joseph Halpern Department the problems of secret sharing and multiparty computation, assuming that agents prefer to get the secret (resp get it. We show that, under these assumptions, neither secret sharing nor multiparty function
Extended Dry Storage of Used Nuclear Fuel: Technical Issues: A USA Perspective
McConnell, Paul; Hanson, Brady D.; Lee, Moo; Sorenson, Ken B.
2011-10-28T23:59:59.000Z
Used nuclear fuel will likely be stored dry for extended periods of time in the USA. Until a final disposition pathway is chosen, the storage periods will almost definitely be longer than were originally intended. The ability of the important-to-safety structures, systems and components (SSC's) continue to meet storage and transport safety functions over extended times must be determined. It must be assured that there is no significant degradation of the fuel or dry cask storage systems. Also, it is projected that the maximum discharge burnups of the used nuclear fuel will increase. Thus, it is necessary to obtain data on high burnup fuel to demonstrate that the used nuclear fuel remains intact after extended storage. An evaluation was performed to determine the conditions that may lead to failure of dry storage SSC's. This paper documents the initial technical gap analysis performed to identify data and modeling needs to develop the desired technical bases to ensure the safety functions of dry stored fuel.
EXTENDED X-RAY EMISSION IN THE VICINITY OF THE MICROQUASAR LS 5039: PULSAR WIND NEBULA?
Durant, Martin; Kargaltsev, Oleg [Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL (United States); Pavlov, George G.; Chang, Chulhoon; Garmire, Gordon P., E-mail: martin.durant@astro.ufl.edu [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA (United States)
2011-07-01T23:59:59.000Z
LS 5039 is a high-mass binary with a period of 4 days, containing a compact object and an O-star, one of the few high-mass binaries detected in {gamma}-rays. Our Chandra Advanced CCD Imaging Spectrometer observation of LS 5039 provided a high-significance ({approx}10{sigma}) detection of extended emission clearly visible for up to 1' from the point source. The spectrum of this emission can be described by an absorbed power-law model with photon index {Gamma} = 1.9 {+-} 0.3, somewhat softer than the point-source spectrum {Gamma} = 1.44 {+-} 0.07, with the same absorption, N{sub H} = (6.4 {+-} 0.6) x 10{sup 21} cm{sup -2}. The observed 0.5-8 keV flux of the extended emission is {approx_equal} 8.8 x 10{sup -14} erg s{sup -1}cm{sup -2} or 5% of the point-source flux; the latter is a factor of {approx}2 lower than the lowest flux detected so far. Fainter extended emission with comparable flux and a softer ({Gamma} {approx} 3) spectrum is detected at even greater radii (up to 2'). Two possible interpretations of the extended emission are a dust scattering halo and a synchrotron nebula powered by energetic particles escaping the binary. We discuss both of these scenarios and favor the nebula interpretation, although some dust contribution is possible. We have also found transient sources located within a narrow stripe south of LS 5039. We discuss the likelihood of these sources to be related to LS 5039.
Extended space expectation values in quantum dynamical system evolutions
Demiralp, Metin [Istanbul Technical University, Informatics Institute, Maslak, 34469, Istanbul (Turkey)
2014-10-06T23:59:59.000Z
The time variant power series expansion for the expectation value of a given quantum dynamical operator is well-known and well-investigated issue in quantum dynamics. However, depending on the operator and Hamiltonian singularities this expansion either may not exist or may not converge for all time instances except the beginning of the evolution. This work focuses on this issue and seeks certain cures for the negativities. We work in the extended space obtained by adding all images of the initial wave function under the system Hamiltonian’s positive integer powers. This requires the introduction of certain appropriately defined weight operators. The resulting better convergence in the temporal power series urges us to call the new defined entities “extended space expectation values” even though they are constructed over certain weight operators and are somehow pseudo expectation values.
Superconducting Cosmic Strings and One Dimensional Extended Supersymmetric Algebras
V. K. Oikonomou
2014-04-30T23:59:59.000Z
In this article we study in detail the supersymmetric structures that underlie the system of fermionic zero modes around a superconducting cosmic string. Particularly, we extend the analysis existing in the literature on the one dimensional $N=2$ supersymmetry and we find multiple $N=2$, $d=1$ supersymmetries. In addition, compact perturbations of the Witten index of the system are performed and we find to which physical situations these perturbations correspond. More importantly, we demonstrate that there exists a much more rich supersymmetric structure underlying the system of fermions with $N_f$ flavors and these are $N$-extended supersymmetric structures with non-trivial topological charges, with "$N$" depending on the fermion flavors.
Black holes in Born-Infeld extended new massive gravity
Ghodsi, Ahmad; Yekta, Davood Mahdavian [Department of Physics, Ferdowsi University of Mashhad, P.O. Box 1436, Mashhad (Iran, Islamic Republic of)
2011-05-15T23:59:59.000Z
In this paper we find different types of black holes for the Born-Infeld extended new massive gravity. Our solutions include (un)charged warped (anti-)de Sitter black holes for four and six derivative expanded action. We also look at the black holes in unexpanded Born-Infeld action. In each case we calculate the entropy, angular momentum and mass of the black holes. We also find the central charges for the conformal field theory duals.
Report on extending the solar program in Federal buildings
Not Available
1980-02-01T23:59:59.000Z
The potential benefits of extending the Solar in Federal Buildings Program are presented. Some of these are: meeting National Energy Conservation Policy Act goals, centralized management of program elements, establish central coordination of federal agency solar activities, assert federal government leadership role in promoting solar technologies, guarantee market support to solar industry, expanding federal agency solar activities, development of private and public sector solar capabilities, and enhancement of solar product development effort. (MHR)
Light curves from supernova shock breakout through an extended wind
Ginzburg, Sivan; Balberg, Shmuel [Racah Institute of Physics, The Hebrew University, Jerusalem 91904 (Israel)
2014-01-01T23:59:59.000Z
Recent observations suggest that some supernovae may be the result of an explosion into an optically thick circumstellar material, the product of pre-explosion mass loss (wind) by the progenitor star. This scenario has been studied previously both analytically and numerically. However, many previous studies base their analysis on the diffusion approximation for radiation transfer, which is inappropriate in the optically thin outer layers of the wind. Here we study the deviations from diffusion and calculate light curves more accurately using a Monte Carlo approach to photon transfer. We distinguish between 'compact' winds, for which the diffusion approximation is appropriate, and 'extended' winds, which require a more delicate treatment of the radiation. We show that this effect is more significant than that of the light-travel time difference to a distant observer, which has a secondary influence on the light curves of extended-wind systems. We also comment on the applicability of the widely used flux-limited diffusion approximation in this context: we find that it generally does not reproduce the Monte Carlo results. The flux-limited diffusion approximation leads to results that are not only quantitatively but also qualitatively wrong in the extended-wind regime.
Models for solvated biomolecular structures
Cerutti, David
2007-01-01T23:59:59.000Z
Point Charge / Extended (SPC/E) [15] [100] and Transferableexplicit water models). In both SPC/E and TIP3P, the siteearlier, models such as TIP3P and SPC/E describe water in a
CMS Data Processing Workflows during an Extended Cosmic Ray Run
Not Available
2009-11-01T23:59:59.000Z
The CMS Collaboration conducted a month-long data taking exercise, the Cosmic Run At Four Tesla, during October-November 2008, with the goal of commissioning the experiment for extended operation. With all installed detector systems participating, CMS recorded 270 million cosmic ray events with the solenoid at a magnetic field strength of 3.8 T. This paper describes the data flow from the detector through the various online and offline computing systems, as well as the workflows used for recording the data, for aligning and calibrating the detector, and for analysis of the data.
Reverse Time Migration for Extended Obstacles: Acoustic Waves
Junqing Chen; Zhiming Chen; Guanghui Huang
2014-06-10T23:59:59.000Z
We consider the resolution of the single frequency reverse time migration (RTM) method for extended targets without the assumption of the validation of geometric optics approximation. The resolution analysis, which applies in both penetrable and non-penetrable obstacles with sound soft or impedance boundary condition on the boundary of the obstacle, implies that the imaginary part of the cross-correlation imaging functional is always positive and thus may have better stability properties. Numerical experiments are included to illustrate the powerful imaging quality and to confirm our resolution results.
Distributed Dynamic State Estimation with Extended Kalman Filter
Du, Pengwei; Huang, Zhenyu; Sun, Yannan; Diao, Ruisheng; Kalsi, Karanjit; Anderson, Kevin K.; Li, Yulan; Lee, Barry
2011-08-04T23:59:59.000Z
Increasing complexity associated with large-scale renewable resources and novel smart-grid technologies necessitates real-time monitoring and control. Our previous work applied the extended Kalman filter (EKF) with the use of phasor measurement data (PMU) for dynamic state estimation. However, high computation complexity creates significant challenges for real-time applications. In this paper, the problem of distributed dynamic state estimation is investigated. One domain decomposition method is proposed to utilize decentralized computing resources. The performance of distributed dynamic state estimation is tested on a 16-machine, 68-bus test system.
Recent developments in the analysis and design of extended surface
Snider, A.D.; Kraus, A.D.
1983-05-01T23:59:59.000Z
Earlier papers by the authors developed a new set of parameters for characterizing heat transfer properties of single fins and fins in arrays of extended surface. The use of these parameters has facilitated the solutions to several interesting fin problems namely: a more careful characterization of one-dimensional flow configurations, a method for accomodating continuously distributed heat sources along the fin, a perturbating approach for the approximate computation of the parameters, and new insights into the precepts of the optimal fin shape. These developments are reported in this paper.
An Extendible Reconfigurable Robot Based on Hot Melt Adhesives
Brodbeck, Luzius; Iida, Fumiya
2015-01-01T23:59:59.000Z
do not require fast motion of the robot arm, but some tasks might re- quire dynamic motions. The focus of this analysis is on the RBE processes, for which the dynamic limits of the base are not critical. The static torques on the robot base... - cific experimental platform as the robot base. The hard- ware used for the robot base is a five degrees of free- dom robotic arm (ST Robotics, R-12 Firefly, Fig. 3a) with a range of 500mm and a maximum payload of An Extendible Reconfigurable Robot Based...
A linear accelerator couch attachment for extended SSD treatments
Biggs, P.J.; Leong, J.C.
1983-04-01T23:59:59.000Z
An attachment to an existing linear accelerator couch is described that extends the range of SSD's at which patients can be treated. This couch attachment, which is mounted on castors for ease of mobility, is attached to and locks into the rail of the accelerator couch such that the axis of the new device is normal to the existing couch. All motions of this assembly are then under the ocntrol of the existing couch. The overall size of the couch attachment is 215 cm x 90 cm, sufficiently large to treat all cleinically used fields.
Extended Coherence Time with Atom-Number Squeezed Sources
Wei Li; Ari K. Tuchman; Hui-Chun Chien; Mark A. Kasevich
2006-09-02T23:59:59.000Z
Coherence properties of Bose-Einstein condensates offer the potential for improved interferometric phase contrast. However, decoherence effects due to the mean-field interaction shorten the coherence time, thus limiting potential sensitivity. In this work, we demonstrate increased coherence times with number squeezed states in an optical lattice using the decay of Bloch oscillations to probe the coherence time. We extend coherence times by a factor of 2 over those expected with coherent state BEC interferometry. We observe quantitative agreement with theory both for the degree of initial number squeezing as well as for prolonged coherence times.
EIS-0391: Notice to Extend Scoping Period | Department of Energy
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised FindingDepartment of Energy :to Extend Scoping Period EIS-0391: Notice
Combining Quark and Link Smearing to Improve Extended Baryon Operators
Adam Lichtl; Subhasish Basak; Robert Edwards; George T. Fleming; Urs M. Heller; Colin Morningstar; David Richards; Ikuro Sato; Stephen Wallace
2005-09-29T23:59:59.000Z
The effects of Gaussian quark-field smearing and analytic stout-link smearing on the correlations of gauge-invariant extended baryon operators are studied. Gaussian quark-field smearing substantially reduces contributions from the short wavelength modes of the theory, while stout-link smearing significantly reduces the noise from the stochastic evaluations. The use of gauge-link smearing is shown to be crucial for baryon operators constructed of covariantly-displaced quark fields. Preferred smearing parameters are determined for a lattice spacing a_s ~ 0.1 fm.
Extend the Operating Life of Your Motor | Department of Energy
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube|6721 FederalTexas EnergyofIdahoExceptions toPhotovoltaics (9ExploringExtend the
Extended Battery Life in Electric Vehicles | GE Global Research
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 Science (SC) Environmental Assessments (EA) /EmailMolecularGE, Ford, University of Michigan Extend
EXTENDING NUCLEAR ENERGY TO NON-ELECTRICAL APPLICATIONS
R. Boardman; M. McKellar; D. Ingersoll; Z. Houghton; , R. Bromm; C. Desportes
2014-09-01T23:59:59.000Z
Electricity represents less than half of all energy consumed in the United States and globally. Although a few commercial nuclear power plants world-wide provide energy to non-electrical applications such as district heating and water desalination, nuclear energy has been largely relegated to base-load electricity production. A new generation of smaller-sized nuclear power plants offers significant promise for extending nuclear energy to many non-electrical applications. The NuScale small modular reactor design is especially well suited for these non-traditional customers due to its small unit size, very robust reactor protection features and a highly flexible and scalable plant design. A series of technical and economic evaluation studies have been conducted to assess the practicality of using a NuScale plant to provide electricity and heat to a variety of non-electrical applications, including water desalination, oil refining, and hydrogen production. The studies serve to highlight the unique design features of the NuScale plant for these applications and provide encouraging conclusions regarding the technical and economic viability of extending clean nuclear energy to a broad range of non-electrical energy consumers.
Supersymmetric descendants of self-adjointly extended quantum mechanical Hamiltonians
Al-Hashimi, M.H., E-mail: hashimi@itp.unibe.ch [Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, CH-3012 Bern (Switzerland); Salman, M., E-mail: msalman@qu.edu.qa [Department of Mathematics, Statistics, and Physics, Qatar University, Al Tarfa, Doha 2713 (Qatar); Shalaby, A., E-mail: amshalab@qu.edu.qa [Department of Mathematics, Statistics, and Physics, Qatar University, Al Tarfa, Doha 2713 (Qatar); Physics Department, Faculty of Science, Mansoura University (Egypt); Wiese, U.-J., E-mail: wiese@itp.unibe.ch [Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, CH-3012 Bern (Switzerland); Center for Theoretical Physics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA (United States)
2013-10-15T23:59:59.000Z
We consider the descendants of self-adjointly extended Hamiltonians in supersymmetric quantum mechanics on a half-line, on an interval, and on a punctured line or interval. While there is a 4-parameter family of self-adjointly extended Hamiltonians on a punctured line, only a 3-parameter sub-family has supersymmetric descendants that are themselves self-adjoint. We also address the self-adjointness of an operator related to the supercharge, and point out that only a sub-class of its most general self-adjoint extensions is physical. Besides a general characterization of self-adjoint extensions and their supersymmetric descendants, we explicitly consider concrete examples, including a particle in a box with general boundary conditions, with and without an additional point interaction. We also discuss bulk-boundary resonances and their manifestation in the supersymmetric descendant. -- Highlights: •Self-adjoint extension theory and contact interactions. •Application of self-adjoint extensions to supersymmetry. •Contact interactions in finite volume with Robin boundary condition.
Optically Detected Extended X-Ray Absorption Fine Structure Study of InGaN/GaN Single Quantum Wells
Rigopoulos, N.; Hamilton, B.; Davies, G. J.; Towlson, B. M. [School of Electrical and Electronic Engineering, University of Manchester, Manchester M60 1QD (United Kingdom); Poolton, N. R. J. [Synchrotron Radiation Department, Daresbury Laboratory, Daresbury, Warrington WA4 4AD (United Kingdom); Dawson, P.; Graham, D. M. [School of Physics and Astronomy, University of Manchester, Manchester M60 1QD (United Kingdom); Kappers, M. J.; Humphreys, C. J. [Dept. of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom); Carlson, S. [MAX-lab, Lund University, P.O. Box 118, SE- 221 00 Lund (Sweden)
2007-04-10T23:59:59.000Z
We have investigated the local atomic environment of the Ga atoms in an InxGa1-xN single quantum well structure using Optically Detected Extended X-ray Absorption Fine Structure (OD-EXAFS). A comparison of the OD-EXAFS data with a theoretical model shows the technique to be site selective for this particular structure and reveals that the quantum well emission originates from regions with x=0.15.
T. P. Shestakova
2011-02-01T23:59:59.000Z
A starting point for the present work was the statement recently discussed in the literature that two Hamiltonian formulations for the theory of gravity, the one proposed by Dirac and the other by Arnowitt - Deser - Misner, may not be related by a canonical transformation. In its turn, it raises a question about the equivalence of these two Hamiltonian formulations and their equivalence to the original formulation of General Relativity. We argue that, since the transformation from components of metric tensor to the ADM variables touches gauge degrees of freedom, which are non-canonical from the point of view of Dirac, the problem cannot be resolved in the limits of the Dirac approach. The proposed solution requires the extension of phase space by treating gauge degrees of freedom on an equal footing with other variables and introducing missing velocities into the Lagrangian by means of gauge conditions in differential form. We illustrate with a simple cosmological model the features of Hamiltonian dynamics in extended phase space. Then, we give a clear proof for the full gravitational theory that the ADM-like transformation is canonical in extended phase space in a wide enough class of possible parametrizations.
Far Infrared Spitzer Observations of Elliptical Galaxies: Evidence for Extended Diffuse Dust
Pasquale Temi; Fabrizio Brighenti; William G. Mathews
2007-01-15T23:59:59.000Z
Far-infrared Spitzer observations of elliptical galaxies are inconsistent with simple steady state models of dust creation in red giant stars and destruction by grain sputtering in the hot interstellar gas at T ~ 10^7 K. The flux at 24 microns correlates with optical fluxes, suggesting that this relatively hot dust is largely circumstellar. But fluxes at 70 and 160 microns do not correlate with optical fluxes. Elliptical galaxies with similar L_B have luminosities at 70 and 160 microns (L_70 and L_160) that vary over a factor ~ 100, implying an additional source of dust unrelated to that produced by ongoing local stellar mass loss. Neither L_70/L_B nor L_160/L_B correlate with the stellar age or metallicity. Optical line fluxes from warm gas at T ~ 10^4 K correlate weakly with L_70 and L_160, suggesting that the dust may be responsible for cooling this gas. Many normal elliptical galaxies have emission at 70 microns that is extended to 5-10 kpc. Extended far-infrared emission with sputtering lifetimes of ~10^8 yrs is difficult to maintain by mergers with gas-rich galaxies. Instead, we propose that this cold dust is buoyantly transported from reservoirs of dust in the galactic cores which is supplied by mass loss from stars in the core. Intermittent energy outbursts from AGNs can drive the buoyant outflow.
The status of the Lambda term in quantum geometrodynamics in extended phase space
T. P. Shestakova
2000-10-05T23:59:59.000Z
S. Weinberg pointed out a way to introduce a cosmological term by modifying the theory of gravity. This modification would be justified if the Einstein equations with the cosmological term could be obtained in the classical limit of some physically satisfied quantum theory of gravity. We propose to consider quantum geometrodynamics in extended phase space as a candidate for such a theory. Quantum geometrodynamics in extended phase space aims at giving a selfconsistent description of the integrated system ``the physical object (the Universe) + observation means'', observation means being represented by a reference frame. The Lambda term appears in classical equations under certain gauge conditions and characterizes the state of gravitational vacuum related to a chosen reference frame. The eigenvalue spectrum of Lambda depends on a concrete cosmological model and can be found by solving the Schrodinger equation for a wave function of the Universe. The proposed version of quantum geometrodynamics enables one to make predictions concerning probable values of the Lambda term at various stages of cosmological evolution.
Extending dry storage of spent LWR fuel for 100 years.
Einziger, R. E.
1998-12-16T23:59:59.000Z
Because of delays in closing the back end of the fuel cycle in the U.S., there is a need to extend dry inert storage of spent fuel beyond its originally anticipated 20-year duration. Many of the methodologies developed to support initial licensing for 20-year storage should be able to support the longer storage periods envisioned. This paper evaluates the applicability of existing information and methodologies to support dry storage up to 100 years. The thrust of the analysis is the potential behavior of the spent fuel. In the USA, the criteria for dry storage of LWR spent fuel are delineated in 10 CFR 72 [1]. The criteria fall into four general categories: maintain subcriticality, prevent the release of radioactive material above acceptable limits, ensure that radiation rates and doses do not exceed acceptable levels, and maintain retrievability of the stored radioactive material. These criteria need to be considered for normal, off-normal, and postulated accident conditions. The initial safety analysis report submitted for licensing evaluated the fuel's ability to meet the requirements for 20 years. It is not the intent to repeat these calculations, but to look at expected behavior over the additional 80 years, during which the temperatures and radiation fields are lower. During the first 20 years, the properties of the components may change because of elevated temperatures, presence of moisture, effects of radiation, etc. During normal storage in an inert atmosphere, there is potential for the cladding mechanical properties to change due to annealing or interaction with cask materials. The emissivity of the cladding could also change due to storage conditions. If there is air leakage into the cask, additional degradation could occur through oxidation in breached rods, which could lead to additional fission gas release and enlargement of cladding breaches. Air in-leakage could also affect cover gas conductivity, cladding oxidation, emissivity changes, and excessive creep and mechanical property changes. Postulated accident scenarios would be the same for 20-year or 100-year storage, because they are mostly governed by operational or outside events, and not by the cask or fuel. Analyses of accident scenarios during extended dry storage could be impacted by fuel and cask changes that would result from the extended period of storage. Overall, the results of this work indicate that, based on fuel behavior, spent fuel at burnups below {approximately}45 GWd/MTU can be dry stored for 100 years. Long-term storage of higher burnup fuel or fuels with newer cladding will require the determination of temperature limits based on evaluation of stress-driven degradation mechanisms of the cladding.
Extended-length power sections improve PDM drilling
Moles, H. [Baker Hughes INTEQ, Aberdeen (United Kingdom)
1995-12-01T23:59:59.000Z
Since being introduced in the 1960s, downhole positive displacement motors (PDMs) have evolved steadily from early applications. Initially considered only for high-speed, medium-torque, initial directional kickoffs; and short, corrective directional operations, these tools were not expected to operate for more than a few hours at a time. Progressive improvements have led to tools that are capable of extended runs in a variety of configurations. Current generation PDMs have a broad range of applications and include fully steerable systems for directional or horizontal drilling, and instrumented motors incorporating formation evaluation measurement-while-drilling (FEMWD) systems for geological steering and reservoir navigation. Design improvements also expanded PDM applications to include hole sections traditionally drilled with conventional rotary-driven bottomhole assemblies (BHAs). This paper reviews these new motor designs and provides case histories of their performance.
Improved Maximum Entropy Analysis with an Extended Search Space
Alexander Rothkopf
2013-01-07T23:59:59.000Z
The standard implementation of the Maximum Entropy Method (MEM) follows Bryan and deploys a Singular Value Decomposition (SVD) to limit the dimensionality of the underlying solution space apriori. Here we present arguments based on the shape of the SVD basis functions and numerical evidence from a mock data analysis, which show that the correct Bayesian solution is not in general recovered with this approach. As a remedy we propose to extend the search basis systematically, which will eventually recover the full solution space and the correct solution. In order to adequately approach problems where an exponentially damped kernel is used, we provide an open-source implementation, using the C/C++ language that utilizes high precision arithmetic adjustable at run-time. The LBFGS algorithm is included in the code in order to attack problems without the need to resort to a particular search space restriction.
Question of the Week: How Do You Feel About the Extended Daylight...
Broader source: Energy.gov (indexed) [DOE]
Feel About the Extended Daylight Saving Time? Question of the Week: How Do You Feel About the Extended Daylight Saving Time? March 12, 2009 - 6:00am Addthis Have you been drinking...
Extending the cereus group genomics to putative food-borne pathogens of different toxicity
2008-01-01T23:59:59.000Z
Extending the cereus group genomics to putative food- borneGoltsman, et al Author(s) Division Genomics Extending thecereus group genomics to putative food-borne pathogens of
THE EXPANSION OF ACTIVE REGIONS INTO THE EXTENDED SOLAR CORONA
Morgan, Huw; Jeska, Lauren; Leonard, Drew, E-mail: hmorgan@aber.ac.uk [Sefydliad Mathemateg a Ffiseg, Prifysgol Aberystwyth, Ceredigion SY23 3BZ (United Kingdom)
2013-06-01T23:59:59.000Z
Advanced image processing of Large Angle and Spectrometric Coronagraph Experiment (LASCO) C2 observations reveals the expansion of the active region closed field into the extended corona. The nested closed-loop systems are large, with an apparent latitudinal extent of 50 Degree-Sign , and expanding to heights of at least 12 R{sub Sun }. The expansion speeds are {approx}10 km s{sup -1} in the AIA/SDO field of view, below {approx}20 km s{sup -1} at 2.3 R{sub Sun }, and accelerate linearly to {approx}60 km s{sup -1} at 5 R{sub Sun }. They appear with a frequency of one every {approx}3 hr over a time period of around three days. They are not coronal mass ejections (CMEs) since their gradual expansion is continuous and steady. They are also faint, with an upper limit of 3% of the brightness of background streamers. Extreme ultraviolet images reveal continuous birth and expansion of hot, bright loops from a new active region at the base of the system. The LASCO images show that the loops span a radial fan-like system of streamers, suggesting that they are not propagating within the main coronal streamer structure. The expanding loops brighten at low heights a few hours prior to a CME eruption, and the expansion process is temporarily halted as the closed field system is swept away. Closed magnetic structures from some active regions are not isolated from the extended corona and solar wind, but can expand to large heights in the form of quiescent expanding loops.
Various ways to compute the continuous-discrete Extended Kalman Filter
Paris-Sud XI, Université de
1 Various ways to compute the continuous-discrete Extended Kalman Filter Paul Frogerais, Jean-Jacques Bellanger and Lotfi Senhadji Abstract--The Extended Kalman Filter (EKF) is a very popular tool dealing is guaranteed. Index Terms--Extended Kalman filters, Continuous- discrete filters, Runge-Kutta method, nonlinear
Detection of Broken Bars in Induction Motors Using an Extended Kalman Filter
Paris-Sud XI, Université de
Detection of Broken Bars in Induction Motors Using an Extended Kalman Filter for Rotor Resistance and currents are processed by an Extended Kalman Filter for the speed and rotor resistance simultaneous bars. In the proposed extended Kalman Filter approach, the state covariance matrix is adequacy weighted
On-line Structure and Motion Estimation based on an Novel Parameterized Extended Kalman Filter
Lunds Universitet
On-line Structure and Motion Estimation based on an Novel Parameterized Extended Kalman Filter sequences. The proposed method is based on an extended Kalman filter and a novel parameterization. We assume. Then we apply an extended Kalman filter for estimation of both structure and motion. The performance
Paris-Sud XI, Université de
DISCRETE EXTENDED KALMAN FILTER ON LIE GROUPS Guillaume Bourmaud, Rémi Mégret, Audrey Giremus, 33405 Talence cedex, France ABSTRACT In this paper, we generalize the Discrete Extended Kalman Filter (D called Discrete Extended Kalman Filter on Lie Groups (D- LG-EKF). It assumes that the posterior
THE STEFAN PROBLEM: A STOCHASTIC ANALYSIS USING THE EXTENDED FINITE ELEMENT METHOD
Zabaras, Nicholas J.
THE STEFAN PROBLEM: A STOCHASTIC ANALYSIS USING THE EXTENDED FINITE ELEMENT METHOD Baskar these uncertainties in a stochastic sense using the extended finite element method as the deterministic solution convection using the extended finite element method (XFEM) and level set methods," Journal of Computational
Control of unstable steady states by extended time-delayed feedback
Thomas Dahms; Philipp Hoevel; Eckehard Schoell
2007-08-01T23:59:59.000Z
Time-delayed feedback methods can be used to control unstable periodic orbits as well as unstable steady states. We present an application of extended time delay autosynchronization introduced by Socolar et al. to an unstable focus. This system represents a generic model of an unstable steady state which can be found for instance in a Hopf bifurcation. In addition to the original controller design, we investigate effects of control loop latency and a bandpass filter on the domain of control. Furthermore, we consider coupling of the control force to the system via a rotational coupling matrix parametrized by a variable phase. We present an analysis of the domain of control and support our results by numerical calculations.
Will boson-sampling ever disprove the Extended Church-Turing thesis?
Peter P. Rohde; Keith R. Motes; Paul A. Knott; William J. Munro
2014-05-26T23:59:59.000Z
Boson-sampling is a highly simplified, but non-universal, approach to implementing optical quantum computation. It was shown by Aaronson and Arkhipov that this protocol cannot be efficiently classically simulated unless the polynomial hierarchy collapses, which would be a shocking result in computational complexity theory. Based on this, numerous authors have made the claim that experimental boson-sampling would provide evidence against, or disprove, the Extended Church-Turing thesis -- that any physically realisable system can be efficiently simulated on a Turing machine. We argue against this claim on the basis that, under a general, physically realistic independent error model, boson-sampling does not implement a provably hard computational problem in the asymptotic limit of large systems.
The Search for High Energy Extended Emission by Fermi-LAT from Swift-Localized Gamma-Ray Bursts
Chiang, J.; /Stanford U., HEPL /SLAC; Racusin, J.L.; /NASA, Goddard
2012-05-01T23:59:59.000Z
The brighter Fermi-LAT bursts have exhibited emission at energies >0.1 GeV that persists as late as {approx}2 ks after the prompt phase has nominally ended. This so-called 'extended emission' could arise from continued activity of the prompt burst mechanism or it could be the start of a high energy afterglow component. The high energy extended emission seen by the LAT has typically followed a t{sup -}{gamma} power-law temporal decay where {gamma} {approx} 1.2-1.7 and has shown no strong indication of spectral evolution. In contrast, the prompt burst emission generally displays strong spectral variability and more complex temporal changes in the LAT band. This differing behavior suggests that the extended emission likely corresponds to an early afterglow phase produced by an external shock. In this study, we look for evidence of high energy extended emission from 145 Swift-localized GRBs that have occurred since the launch of Fermi. A majority of these bursts were either outside of the LAT field-of-view or were otherwise not detected by the LAT during the prompt phase. However, because of the scanning operation of the Fermi satellite, the long-lived extended emission of these bursts may be detectable in the LAT data on the {approx}few ks time scale. We will look for emission from individual bursts and will perform a stacking analysis in order to set bounds on this emission for the sample as a whole. The detection of such emission would have implications for afterglow models and for the overall energy budget of GRBs.
Einziger, R.E.; Compton, K.; Gordon, M.; Ahn, T.; Gonzales, H. [United States Nuclear Regulatory Commission, Rockville, Maryland 20852 (United States); Pan, Y. [Center for Nuclear Waste Regulatory Analyses, San Antonio, TX 78238 (United States)
2012-07-01T23:59:59.000Z
Any new direction proposed for the back-end of spent nuclear fuel (SNF) cycle will require storage of SNF beyond the current licensing periods. The Nuclear Regulatory Commission (NRC) has established a technical research program to determine if any changes in the 10 CFR part 71, and 72 requirements, and associated guidance might be necessary to regulate the safety of anticipated extended storage, and subsequent transport of SNF. This three part program of: 1) analysis of knowledge gaps in the potential degradation of materials, 2) short-term research and modeling, and 3) long-term demonstration of systems, will allow the NRC to make informed regulatory changes, and determine when and if additional monitoring and inspection of the systems is necessary. The NRC has started a research program to obtain data necessary to determine if the current regulatory guidance is sufficient if interim dry storage has to be extended beyond the currently approved licensing periods. The three-phased approach consists of: - the identification and prioritization of potential degradation of the components related to the safe operation of a dry cask storage system, - short-term research to determine if the initial analysis was correct, and - a long-term prototypic demonstration project to confirm the models and results obtained in the short-term research. The gap analysis has identified issues with the SCC of the stainless steel canisters, and SNF behavior. Issues impacting the SNF and canister internal performance such as high and low temperature distributions, and drying have also been identified. Research to evaluate these issues is underway. Evaluations have been conducted to determine the relative values that various types of long-term demonstration projects might provide. These projects or follow-on work is expected to continue over the next five years. (authors)
Prospects for GeV-TeV detection of short gamma-ray bursts with extended emission
Veres, P.; Mészáros, P., E-mail: veres@gwu.edu [Department of Astronomy and Astrophysics Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States)
2014-06-01T23:59:59.000Z
We discuss the GeV to TeV photon emission of gamma-ray bursts (GRBs) within the refreshed shock and the continuous injection scenarios, motivated by the observation of extended emission in a substantial fraction of short GRBs. In the first model we assume that the central engine promptly emits material with a range of Lorentz factors. When the fastest shell starts to decelerate, it drives a forward shock into the ambient medium and a reverse shock into the ejecta. These shocks are reenergized by the slower and later arriving material. In the second model we assume that there is a continued ejection of material over an extended time, and the continuously arriving new material keeps reenergizing the shocks formed by the preceding shells of ejecta. We calculate the synchrotron and synchrotron self-Compton radiation components for the forward and reverse shocks and find that prospective and current GeV-TeV range instruments such as CTA, HAWC, VERITAS, MAGIC, and HESS have a good chance of detecting afterglows of short bursts with extended emission, assuming a reasonable response time.
Extending SysML for Integration with Solver-based
Shapiro, Benjamin
by integrated models of: Model-based Systems Engineering Requirements Accelerate at of 4 m/s2 100 kw hydraulic;Overview Â§ Motivation and approach Â§ Dynamic simulation overview Â§ SysML extension Â§ Detailed example Â§ Transforming to simulation formats Â§ Summary #12;Overview Â§ Motivation and approach Â§ Dynamic simulation
Alfvenic Turbulence in the Extended Solar Corona: Kinetic Effects and Proton Heating
S. R. Cranmer; A. A. van Ballegooijen
2003-05-08T23:59:59.000Z
We present a model of magnetohydrodynamic (MHD) turbulence in the extended solar corona that contains the effects of collisionless dissipation and anisotropic particle heating. Measurements made by UVCS/SOHO have revived interest in the idea that ions are energized by the dissipation of ion cyclotron resonant waves, but such high-frequency (i.e., small wavelength) fluctuations have not been observed. A turbulent cascade is one possible way of generating small-scale fluctuations from a pre-existing population of low-frequency MHD waves. We model this cascade as a combination of advection and diffusion in wavenumber space. The dominant spectral transfer occurs in the direction perpendicular to the background magnetic field. As expected from earlier models, this leads to a highly anisotropic fluctuation spectrum with a rapidly decaying tail in parallel wavenumber. The wave power that decays to high enough frequencies to become ion cyclotron resonant depends on the relative strengths of advection and diffusion in the cascade. For the most realistic values of these parameters, though, there is insufficient power to heat protons and heavy ions. The dominant oblique fluctuations (with dispersion properties of kinetic Alfven waves) undergo Landau damping, which implies strong parallel electron heating. We discuss the probable nonlinear evolution of the electron velocity distributions into parallel beams and discrete phase-space holes (similar to those seen in the terrestrial magnetosphere) which can possibly heat protons via stochastic interactions.
Extending the lifetime of fuel cell based hybrid systems
Jianli Zhuo; Chaitali Chakrabarti; Naehyuck Chang; Sarma Vrudhula
2006-01-01T23:59:59.000Z
Fuel cells are clean power sources that have much higher energy densities and lifetimes compared to batteries. However, fuel cells have limited load following capabilities and cannot be efficiently utilized if used in isolation. In this work, we consider a hybrid system where a fuel cell based hybrid power source is used to provide power to a DVFS processor. The hybrid power source consists of a room temperature fuel cell operating as the primary power source and a Li-ion battery (that has good load following capability) operating as the secondary source. Our goal is to develop polices to extend the lifetime of the fuel cell based hybrid system. First, we develop a charge based optimization framework which minimizes the charge loss of the hybrid system (and not the energy consumption of the DVFS processor). Next, we propose a new algorithm to minimize the charge loss by judiciously scaling the load current. We compare the performance of this algorithm with one that has been optimized for energy, and demonstrate its superiority. Finally, we evaluate the performance of the hybrid system under different system configurations and show how to determine the best combination of fuel cell size and battery capacity for a given embedded application.
On canonical transformations of gravitational variables in extended phase space
T. P. Shestakova
2010-07-19T23:59:59.000Z
Last years a certain attention was attracted to the statement that Hamiltonian formulations of General Relativity, in which different parametrizations of gravitational variables were used, may not be related by a canonical transformation. The example was given by the Hamiltonian formulation of Dirac and that of Arnowitt - Deser - Misner. It might witness for non-equivalence of these formulations and the original (Lagrangian) formulation of General Relativity. The problem is believed to be of importance since many authors make use of various representations of gravitational field as a starting point in searching a way to reconcile the theory of gravity with quantum principles. It can be shown that the mentioned above conclusion about non-equivalence of different Hamiltonian formulations is based on the consideration of canonical transformations in phase space of physical degrees of freedom only, while the transformations also involve gauge degrees of freedom. We shall give a clear proof that Hamiltonian formulations corresponding to different parametrizations of gravitational variables are related by canonical transformations in extended phase space embracing gauge degrees of freedom on an equal footing with physical ones. It will be demonstrated for the full gravitational theory in a wide enough class of parametrizations and gauge conditions.
An Extended Network Coding Opportunity Discovery Scheme in Wireless Networks
Zhao, Yunlong; Iwai, Masayuki; Sezaki, Kaoru; Tobe, Yoshito; 10.5121/ijcnc.2012.4106
2012-01-01T23:59:59.000Z
Network coding is known as a promising approach to improve wireless network performance. How to discover the coding opportunity in relay nodes is really important for it. There are more coding chances, there are more times it can improve network throughput by network coding operation. In this paper, an extended network coding opportunity discovery scheme (ExCODE) is proposed, which is realized by appending the current node ID and all its 1-hop neighbors' IDs to the packet. ExCODE enables the next hop relay node to know which nodes else have already overheard the packet, so it can discover the potential coding opportunities as much as possible. ExCODE expands the region of discovering coding chance to n-hops, and have more opportunities to execute network coding operation in each relay node. At last, we implement ExCODE over the AODV protocol, and efficiency of the proposed mechanism is demonstrated with NS2 simulations, compared to the existing coding opportunity discovery scheme.
Extended and Revised Analysis of Singly Ionized Tin: Sn II
Haris, K; Tauheed, A
2013-01-01T23:59:59.000Z
The electronic structure of singly ionized tin (SnII) is partly a one-electron and partly a three-electron system with ground configuration 5s25p. The excited configurations are of the type 5s2nl in the one-electron part, and 5s5p2, 5p3 and 5s5pnl (nl = 6s, 5d) in the three-electron system with quartet and doublet levels. The spectrum analyzed in this work was recorded on a 3 m normal incidence vacuum spectrograph of the Antigonish laboratory (Canada) in the wavelength region 300 - 2080 {\\AA} using a triggered spark source. The existing interpretation of the one-electron level system was confirmed in this paper, while the 2S1/2 level of the 5s5p2 configuration has been revised. The analysis has been extended to include new configurations 5p3, 5s5p5d and 5s5p6s with the aid of superposition-of-configurations Hartree-Fock calculations with relativistic corrections. The ionization potential obtained from the ng series was found to be 118023.7(5) 1/cm (14.63307(6) eV). We give a complete set of critically evaluat...
Drilling engineering package used for extended reach project
Chapman, P. (BP Exploration, Sunbury (United Kingdom)); Good, A. (Baker Hughes Inteq, Houston, TX (United States))
1995-02-20T23:59:59.000Z
Extended reach drilling can improve the economics of some field developments by minimizing the number of facilities required to access remote reserves. The technique requires detailed engineering design and monitoring, however, to minimize the risk of operating at the limits of drilling equipment. Working as a team over the past 4 years, BP Exploration (BPX) and Baker Hughes Inteq have developed an integrated drilling engineering package for the planning, monitoring, and review of well construction data. The drilling engineering application platform (DEAP) is now used by BP Exploration worldwide for the integrated engineering design, monitoring, and review of its wells. These engineering applications are linked together via a data base and drilling reporting system. Integration between rig site reporting and the engineering applications allows the current drilling operation to be analyzed at the touch of a single computer button. DEAP also provides links to commercially available software packages. This facility, along with its graphical user interface, encourages and simplifies the use of engineering tools at the rig site. The full capabilities of DEAP can perhaps be seen as four key functions necessary for successful well bore construction management.
Improved Maximum Entropy Method with an Extended Search Space
Alexander Rothkopf
2012-08-25T23:59:59.000Z
We report on an improvement to the implementation of the Maximum Entropy Method (MEM). It amounts to departing from the search space obtained through a singular value decomposition (SVD) of the Kernel. Based on the shape of the SVD basis functions we argue that the MEM spectrum for given $N_\\tau$ data-points $D(\\tau)$ and prior information $m(\\omega)$ does not in general lie in this $N_\\tau$ dimensional singular subspace. Systematically extending the search basis will eventually recover the full search space and the correct extremum. We illustrate this idea through a mock data analysis inspired by actual lattice spectra, to show where our improvement becomes essential for the success of the MEM. To remedy the shortcomings of Bryan's SVD prescription we propose to use the real Fourier basis, which consists of trigonometric functions. Not only does our approach lead to more stable numerical behavior, as the SVD is not required for the determination of the basis functions, but also the resolution of the MEM becomes independent from the position of the reconstructed peaks.
A System for Protecting CRUTIAL Things (Extended Abstract)
Correia, Miguel
their ex- posure to cyber-attacks coming from the Internet. Firstly, the computers, networks and protocols transformation substations or corporate offices) are modeled as collections of LANs interconnected by a wider
Quasi light fields: Extending the light field to coherent radiation
Accardi, Anthony J.
Imaging technologies such as dynamic viewpoint generation are engineered for incoherent radiation using the traditional light field, and for coherent radiation using electromagnetic field theory. We present a model of ...
Probabilistic Graphical Model Representation in Phylogenetics
Hö hna, Sebastian; Heath, Tracy A.; Boussau, Bastien; Landis, Michael J.; Ronquist, Fredrik; Huelsenbeck, John P.
2014-06-20T23:59:59.000Z
models, to facilitate communication among phylogeneticists and in the development of generic software for simulation and statistical inference. Here, we provide an introduction to graphical models for phylogeneticists and extend the standard graphical...
From Ultracompact to Extended HII Regions. II: Cloud Gravity and Stellar Motion
Jose Franco; Guillermo Garcia-Segura; Stan Kurtz
2005-08-22T23:59:59.000Z
The dynamical evolution of HII regions with and without stellar motion in dense, structured molecular clouds is studied. Clouds are modeled in hydrostatic equilibrium, with gaussian central cores and external halos that obey r**-2 and r**-3 density power laws. The cloud gravity is included as a time-independent, external force. Stellar velocities of 0, 2, 8, and 12 km/s are considered. When stellar motion is included, stars move from the central core to the edge of the cloud, producing transitions from ultracompact to extended HII regions as the stars move into lower density regions. The opposite behavior occurs when stars move toward the cloud cores. The main conclusion of our study is that ultracompact HII regions are pressure-confined entities while they remain embedded within dense cores. The confinement comes from ram and/or ambient pressures. The survival of ultracompact regions depends on the position of the star with respect to the core, the stellar life-time, and the core crossing time. Stars with velocities less than the cloud dispersion velocity can produce cometary shapes smaller than 0.1 pc at times of 20,000 yr or more. The sequence Ultracompact to Compact to Extended HII region shows a variety of unpredictable structures due to ionization-shock front instability. Some ultracompact HII regions with a core-halo morphology might be explained by self-blocking effects, when stars overtake and ionize leading, piled-up clumps of neutral gas. We use thermal energy to support the cloud against gravity; the results remain the same if other types of isotropic cloud support are used.
New observations of the extended hydrogen exosphere of the extrasolar planet HD209458b
David Ehrenreich; Alain Lecavelier des Etangs; Guillaume Hébrard; Jean-Michel Désert; Alfred Vidal-Madjar; John C. McConnell; Christopher D. Parkinson; Gilda E. Ballester
2008-03-12T23:59:59.000Z
Atomic hydrogen escaping from the planet HD209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. However, the Space Telescope Imaging Spectrograph (STIS) used in previous observational studies is no longer available, whereas additional observations are still needed to better constrain the mechanisms subtending the evaporation process, and determine the evaporation state of other `hot Jupiters'. Here, we aim to detect the extended hydrogen exosphere of HD209458b with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST) and to find evidence for a hydrogen comet-like tail trailing the planet, which size would depend on the escape rate and the amount of ionizing radiation emitted by the star. These observations also provide a benchmark for other transiting planets, in the frame of a comparative study of the evaporation state of close-in giant planets. Eight HST orbits are used to observe two transits of HD209458b. Transit light curves are obtained by performing photometry of the unresolved stellar Lyman-alpha emission line during both transits. Absorption signatures of exospheric hydrogen during the transit are compared to light curve models predicting a hydrogen tail. Transit depths of (9.6 +/- 7.0)% and (5.3 +/- 10.0)% are measured on the whole Lyman-alpha line in visits 1 and 2, respectively. Averaging data from both visits, we find an absorption depth of (8.0 +/- 5.7)%, in good agreement with previous studies. The extended size of the exosphere confirms that the planet is likely loosing hydrogen to space. Yet, the photometric precision achieved does not allow us to better constrain the hydrogen mass loss rate.
ATLBS EXTENDED SOURCE SAMPLE: THE EVOLUTION IN RADIO SOURCE MORPHOLOGY WITH FLUX DENSITY
Saripalli, L.; Subrahmanyan, R.; Thorat, K.; Ekers, R. D. [Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore 560080 (India); Hunstead, R. W.; Johnston, H. M.; Sadler, E. M., E-mail: lsaripal@rri.res.in [Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006 (Australia)
2012-04-01T23:59:59.000Z
Based on the Australia Telescope Low Brightness Survey (ATLBS) we present a sample of extended radio sources and derive morphological properties of faint radio sources. One hundred nineteen radio galaxies form the ATLBS Extended Source Sample (ATLBS-ESS) consisting of all sources exceeding 30'' in extent and integrated flux densities exceeding 1 mJy. We give structural details along with information on galaxy identifications and source classifications. The ATLBS-ESS, unlike samples with higher flux-density limits, has almost equal fractions of FR-I and FR-II radio galaxies, with a large fraction of the FR-I population exhibiting 3C31-type structures. Significant asymmetry in lobe extents appears to be a common occurrence in the ATLBS-ESS FR-I sources compared with FR-II sources. We present a sample of 22 FR-Is at z > 0.5 with good structural information. The detection of several giant radio sources, with size exceeding 0.7 Mpc, at z > 1 suggests that giant radio sources are not less common at high redshifts. The ESS also includes a sample of 28 restarted radio galaxies. The relative abundance of dying and restarting sources is indicative of a model where radio sources undergo episodic activity in which an active phase is followed by a brief dying phase that terminates with restarting of the central activity; in any massive elliptical a few such activity cycles wherein adjacent events blend may constitute the lifetime of a radio source and such bursts of blended activity cycles may be repeated over the age of the host. The ATLBS-ESS includes a 2 Mpc giant radio galaxy with the lowest surface brightness lobes known to date.
Peccei-Quinn invariant singlet extended SUSY with anomalous U(1) gauge symmetry
Sang Hui Im; Min-Seok Seo
2014-12-08T23:59:59.000Z
Recent discovery of the SM-like Higgs boson with $m_h\\simeq 125$ GeV motivates an extension of the minimal supersymmetric standard model (MSSM), which involves a singlet Higgs superfield with a sizable Yukawa coupling to the doublet Higgs superfields. We examine such singlet-extended SUSY models with a Peccei-Quinn (PQ) symmetry that originates from an anomalous $U(1)_A$ gauge symmetry. We focus on the specific scheme that the PQ symmetry is spontaneously broken at an intermediate scale $v_{\\rm PQ}\\sim \\sqrt{m_{\\rm SUSY}M_{\\rm Pl}}$ by an interplay between Planck scale suppressed operators and tachyonic soft scalar mass $m_{\\rm SUSY}\\sim \\sqrt{D_A}$ induced dominantly by the $U(1)_A$ $D$-term, $D_A$. This scheme also results in spontaneous SUSY breaking in the PQ sector, generating the gaugino masses $M_{1/2}\\sim \\sqrt{D_A}$ when it is transmitted to the MSSM sector by the conventional gauge mediation mechanism. As a result, the MSSM soft parameters in this scheme are induced mostly by the $U(1)_A$ $D$-term and the gauge mediated SUSY breaking from the PQ sector, so that the sparticle masses can be near the present experimental bounds without causing the SUSY flavor problem. The scheme is severely constrained by the condition that a phenomenologically viable form of the low energy operators of the singlet and doublet Higgs superfields is generated by the PQ breaking sector in a way similar to the Kim-Nilles solution of the $\\mu$ problem, and the resulting Higgs mass parameters allow the electroweak symmetry breaking with small $\\tan\\beta$. We find two minimal models with two singlet Higgs superfields, satisfying this condition with a relatively simple form of the PQ breaking sector, and briefly discuss some phenomenological aspects of the model.
Extended LargeQ Potts Model Simulation of Foam Drainage Yi Jiang and James A. Glazier
Kurien, Susan
as brewing, lubrication, oil recovery, and fire fighting. Characterizing their structure and evolution in an unstable in terface or in viscous fingering. Instead, the meanfield theory predicts a flat interface illary effects and gravity balance. For pulsed drainage, as liquid drains from the top of the foam
An extended Zel'dovich model for the halo mass function
Lim, Seunghwan; Lee, Jounghun, E-mail: shlim@astro.snu.ac.kr, E-mail: jounghun@astro.snu.ac.kr [Astronomy Program, FPRD, Department of Physics and Astronomy, Seoul National University, Seoul 151-747 (Korea, Republic of)
2013-01-01T23:59:59.000Z
A new way to construct a fitting formula for the halo mass function is presented. Our formula is expressed as a solution to the modified Jedamzik matrix equation that automatically satisfies the normalization constraint. The characteristic parameters expressed in terms of the linear shear eigenvalues are empirically determined by fitting the analytic formula to the numerical results from the high-resolution N-body simulation and found to be independent of scale, redshift and background cosmology. Our fitting formula with the best-fit parameters is shown to work excellently in the wide mass-range at various redshifts: The ratio of the analytic formula to the N-body results departs from unity by up to 10% and 5% over 10{sup 11} ? M/(h{sup ?1}M{sub s}un) ? 5 × 10{sup 15} at z = 0,0.5 and 1 for the FoF-halo and SO-halo cases, respectively.
Refining and Extending the Business Model with Information Technology: Dell Computer Corporation
Kraemer, Kenneth L; Dedrick, Jason; Yamashiro, Sandra
1999-01-01T23:59:59.000Z
SAP implementation was dubbed the Genesis Project, and involved a 140 member staff pulled together from corporate and regional information systems
Marquez, Horacio J.
2006-01-01T23:59:59.000Z
. All rights reserved. Keywords: Co-generation systems; Boiler control; Industrial applications; Life
Disordered Supersolids in the Extended Bose-Hubbard Model Vito Scarola
Scarola, Vito
: PRB 85, 020501 (R) 2012 #12;Dirty Supersolids from Bosons · What can experiments with bosonic Narrow Band-Superconductors: Micnas et al., RMP `90 Josephson Junction Arrays: van Otterlo et al., PRB al., PRB '95 Batrouni et al., PRL '00 Sengupta et al., PRL `05 Bernardet et al., PRB '02 · No solid
A distribution-free risk-reward newsvendor model: Extending Scarf's ...
2012-02-07T23:59:59.000Z
Although the ultimate goal of Scarf's analysis is to provide an alternative ... This property makes it simple to derive not only qualitative, but also quantitative.
Energy parameters and novel algorithms for an extended nearest neighbor energy model of RNA
Clote, Peter
have shown that, on average, the minimum free energy structure includes 73% of base pairs in X-ray work of the Tinoco Lab and Freier et al. [10], a number of increasingly sophis- ticated nearest], sampling suboptimal structures [22], RNA sequence-structure align- ments [23], etc. Benchmarking studies
Sun, Dezheng
that the bias is likely linked to a weaker relationship between the short-wave cloud forcing is a long-standing tropical bias in the CGCMs. The early hypotheses attribute this problem to the errors;4 errors may induce excessive equatorial upwelling upon coupling. The surface heating from the atmospheric
Efficient Turing-universal computation with DNA polymers (extended abstract)
Winfree, Erik
of magnitude more energy than required by logical irreversibility, presenting the challenge of building implementations. Here we propose a chemical implementation of stack machines -- a Turing-universal model, and arbitrarily little energy per computation step is required. Further, as a method of embed- ding logic control
Extending the frontiers of mass spectrometric instrumentation and methods
Schieffer, Gregg
2010-12-15T23:59:59.000Z
The focus of this dissertation is two-fold: developing novel analysis methods using mass spectrometry and the implementation and characterization of a novel ion mobility mass spectrometry instrumentation. The novel mass spectrometry combines ion trap for ion/ion reactions coupled to an ion mobility cell. The long term goal of this instrumentation is to use ion/ion reactions to probe the structure of gas phase biomolecule ions. The three ion source - ion trap - ion mobility - qTOF mass spectrometer (IT - IM - TOF MS) instrument is described. The analysis of the degradation products in coal (Chapter 2) and the imaging plant metabolites (Appendix III) fall under the methods development category. These projects use existing commercial instrumentation (JEOL AccuTOF MS and Thermo Finnigan LCQ IT, respectively) for the mass analysis of the degraded coal products and the plant metabolites, respectively. The coal degradation paper discusses the use of the DART ion source for fast and easy sample analysis. The sample preparation consisted of a simple 50 fold dilution of the soluble coal products in water and placing the liquid in front of the heated gas stream. This is the first time the DART ion source has been used for analysis of coal. Steven Raders under the guidance of John Verkade came up with the coal degradation projects. Raders performed the coal degradation reactions, worked up the products, and sent them to me. Gregg Schieffer developed the method and wrote the paper demonstrating the use of the DART ion source for the fast and easy sample analysis. The plant metabolite imaging project extends the use of colloidal graphite as a sample coating for atmospheric pressure LDI. DC Perdian and I closely worked together to make this project work. Perdian focused on building the LDI setup whereas Schieffer focused on the MSn analysis of the metabolites. Both Perdian and I took the data featured in the paper. Perdian was the primary writer of the paper and used it as a chapter in his dissertation. Perdian and Schieffer worked together to address the revisions and publish it in Rapid Communications in Mass Spectrometry Journal.
DOE Extends Comment Period on Notice of Inquiry Under the Energy...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Act of 2007, which implements the Convention on Supplementary Compensation for Nuclear Damage. The public comment period will be extended to October 27, 2010. The signed extension...
DOE Extends Comment Period on Notice of Inquiry Under the Energy...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Act of 2007, which implements the Convention on Supplementary Compensation for Nuclear Damage. The original deadline of September 27, 2010 was extended to October 27, 2010 (75 FR...
Joerg Jaeckel; Andreas Ringwald
2007-06-05T23:59:59.000Z
We present a scheme to extend the sensitivity of axion-photon regeneration experiments towards larger masses with the help of properly chosen and placed phase shift plates.
Speliotopoulos, A. D.
2010-01-01T23:59:59.000Z
z RESEARCH ARTICLE Dark energy and extending the geodesicof motion using the Dark Energy length scale was proposed.observations. Keywords Dark energy · Galactic density pro?le
Speliotopoulos, Achilles D.
2010-01-01T23:59:59.000Z
3 RESEARCH ARTICLE Dark energy and extending the geodesicWith the discovery of Dark Energy, DE , there is now aextension is set. Keywords Dark energy · Geodesic equations
EIS-0385: Notice to Extend the Public Scoping Period and Reschedule...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
to Extend the Public Scoping Period and Reschedule Public Scoping Meetings Strategic Petroleum Reserve Due to the extraordinary circumstances created by Hurricane Katrina in the...
Standardization of Thermo-Fluid Modeling in Modelica.Fluid
Franke, Rudiger
2010-01-01T23:59:59.000Z
a replaceable heat transfer model with the flag use_heat transfer. A concrete heat transfer model extending fromcycle. Also note that the heat transfer model of the tank is
Mathematical Equivalence vs. Physical Equivalence between Extended Theories of Gravitations
L. Fatibene; M. Francaviglia
2013-02-12T23:59:59.000Z
We shall show that although Palatini f(R)-theories are equivalent to Brans-Dicke theories, still the first pass the Mercury precession of perihelia test, while the second do not. We argue that the two models are not physically equivalent due to a different assumptions about free fall. We shall also go through perihelia test without fixing a conformal gauge (clocks or rulers) in order to highlight what can be measured in a conformal invariant way and what cannot. We shall argue that the conformal gauge is broken by choosing a definition of clock, rulers or, equivalently, of masses.
Yang-Mills coupling and cosmological duality of extended objects
Plefka, Jan Christoph
1992-01-01T23:59:59.000Z
obvious. The a ? model of a p ? brane moving in D dimensional curved spacetime is (1. 4) where i = O, . . . , p counting the degrees of freedom of the (p + 1) ? dimensional worldvolume. Solving 6I/67u = 0 gives p? ? fi;X"01X g&, . Plugging this back.... 6) where g' (I = 1, 2) are the worldsheet coordinates and (2xrr') is the string tension Ts, so the 6 ? form potential Barsipqpg (M = 0, 1, . . . , 9) couples to the d = 6 fivebrane worldvolume via the term Ss =, d ( ? "" "ctiX O, Y B&X OtX 0 X c...
Extending magnetohydrodynamics to the slow dynamics of collisionless plasmas
Passot, T.; Sulem, P. L. [Universite de Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France); Hunana, P. [Code 673, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States)
2012-08-15T23:59:59.000Z
A fluid approach aimed to provide a consistent description of the slow dynamics of a collisionless plasma, is presented. In this regime, both Landau damping and finite Larmor radius effects cannot be ignored. Two models are discussed; one retains the dynamics at sub-ionic scales, while the other is restricted to scales larger than the ion gyroscale. Special attention is paid to the capability of these approaches to accurately reproduce the properties of linear waves that are known to play an important role, for example, in the small-scale dynamics of solar wind turbulence.
Critical points of D-dimensional extended gravities
Deser, S.; Liu Haishan; Lue, H.; Pope, C. N.; Sisman, Tahsin Cagri; Tekin, Bayram [Physics Department, Brandeis University, Waltham, Massachusetts 02454 (United States) and Lauritsen Laboratory, California Institute of Technology, Pasadena, California 91125 (United States); Zheijiang Institute of Modern Physics, Department of Physics, Zheijiang University, Hangzhou 310027 (China); China Economics and Management Academy, Central University of Finance and Economics, Beijing 100081 and Institute for Advanced Study, Shenzhen University, Nanhai Ave 3688, Shenzhen 518060 (China); George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A and M University, College Station, Texas 77843 (United States) and DAMTP, Centre for Mathematical Sciences, Cambridge University, Wilberforce Road, Cambridge CB3 OWA (United Kingdom); Department of Physics, Middle East Technical University, 06531, Ankara (Turkey)
2011-03-15T23:59:59.000Z
We study the parameter space of D-dimensional cosmological Einstein gravity together with quadratic curvature terms. In D>4 there are in general two distinct (anti)-de Sitter vacua. We show that, for an appropriate choice of the parameters, there exists a critical point for one of the vacua, with only massless tensor, but neither massive tensor nor scalar, gravitons. At criticality, the linearized excitations have formally vanishing energy (as do black hole solutions). A further restriction of the parameters gives a one-parameter cosmological Einstein plus Weyl{sup 2} model with a unique vacuum, whose {Lambda} is determined.
Yang-Mills coupling and cosmological duality of extended objects
Plefka, Jan Christoph
1992-01-01T23:59:59.000Z
obvious. The a ? model of a p ? brane moving in D dimensional curved spacetime is (1. 4) where i = O, . . . , p counting the degrees of freedom of the (p + 1) ? dimensional worldvolume. Solving 6I/67u = 0 gives p? ? fi;X"01X g&, . Plugging this back.... 6) where g' (I = 1, 2) are the worldsheet coordinates and (2xrr') is the string tension Ts, so the 6 ? form potential Barsipqpg (M = 0, 1, . . . , 9) couples to the d = 6 fivebrane worldvolume via the term Ss =, d ( ? "" "ctiX O, Y B&X OtX 0 X c...
On energy conservation in extended magnetohydrodynamics Keiji Kimura and P. J. Morrison
Morrison, Philip J.,
On energy conservation in extended magnetohydrodynamics Keiji Kimura and P. J. Morrison Citation.1063/1.3587080 Exact energy conservation laws for full and truncated nonlinear gyrokinetic equations Phys. Plasmas 17://scitation.aip.org/termsconditions. Downloaded to IP: 199.92.165.139 On: Fri, 01 Aug 2014 13:41:41 #12;On energy conservation in extended
Development of an extender protocol to enhance the viability of frozen-thawed bovine spermatozoa
Griffin, Erin Michelle
2006-04-12T23:59:59.000Z
will be egg yolk-citrate (EC), egg yolk-tris (IMV), and skim milk (milk). In experiment 1, an ejaculate from each bull was partially extended and cooled to 4 ÂºC for either 2 or 4 hr and then allowed to equilibrate with the glycerolated extender for 2, 4, or 6...
West Virginia University Faculty Position/Coordinator of Extended Campus MSW Program
Azevedo, Ricardo
West Virginia University Faculty Position/Coordinator of Extended Campus MSW Program The West to coordinate its extended campus MSW program offered in Wheeling, West Virginia. The position is full the mission of the School of Social Work with particular emphasis on the needs of northern West Virginia
Efficient generation of extended plasma waveguides with the axicon ignitor-heater scheme
. The plasma col- umn was produced by using an axicon to focus a long laser pulse into a line focusEfficient generation of extended plasma waveguides with the axicon ignitor-heater scheme Y.-F. Xiao for generating extended plasma waveguides is developed by using the axicon lens in conjunction with the ignitor
Kalman Filter and Extended Kalman Filter Namrata Vaswani, namrata@iastate.edu
Vaswani, Namrata
Kalman Filter and Extended Kalman Filter Namrata Vaswani, namrata@iastate.edu Kalman and Extended Kalman Filtering 1 #12;Kalman Filter Introduction · Recursive LS (RLS) was for static data: estimate of an object from a video sequence · RLS with forgetting factor assumes slowly time varying x · Kalman filter
Confidentiality-Preserving Data Publishing for Credulous Users by Extended Abduction
Inoue, Katsumi; Wiese, Lena
2011-01-01T23:59:59.000Z
Publishing private data on external servers incurs the problem of how to avoid unwanted disclosure of confidential data. We study a problem of confidentiality in extended disjunctive logic programs and show how it can be solved by extended abduction. In particular, we analyze how credulous non-monotonic reasoning affects confidentiality.
Extending the fast multipole method to charges inside or outside a dielectric sphere
Cai, Wei
Extending the fast multipole method to charges inside or outside a dielectric sphere Wei Cai a In this paper, we propose a novel method to extend the fast multipole method (FMM) to calculate Elsevier Inc. All rights reserved. AMS subject classifications: 65N38; 78M25 Keywords: Fast multipole
A dusty plasma device for producing extended, steady state, magnetized, dusty plasma columns
Merlino, Robert L.
A dusty plasma device for producing extended, steady state, magnetized, dusty plasma columns Wenjun with an existing Q machine, to produce extended, steady state, magnetized plasma columns. The dusty plasma device (DPD) is to be used for the investigation of waves in dusty plasmas and of other plasma/dust aspects
Retirees with 10 or more years of service Extended Health Care Group Number 909903
Retirees with 10 or more years of service Extended Health Care Group Number 909903 #12: - . ! Extended Health Care (EHC) Please refer to the Table of Contents to help you locate the appropriate section" or "your" in this booklet. Pacific Blue Cross, the registered trade-name of PBC Health Benefits Society
CW Enderlin; DG Alberts; JA Bamberger; M White
1998-09-25T23:59:59.000Z
This report summarizes development of borehole-miner extendible-nozzle water-jetting technology for dislodging and retrieving salt cake, sludge} and supernate to remediate underground storage tanks full of radioactive waste. The extendible-nozzle development was based on commercial borehole-miner technology.
Chen Xi; Gan Conggui; Shen Zhiqiang [Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030 (China); Ellingsen, Simon P.; Titmarsh, Anita [School of Mathematics and Physics, University of Tasmania, Hobart, Tasmania (Australia); He Jinhua, E-mail: chenxi@shao.ac.cn [Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Astronomical Observatory/National Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, Yunnan Province (China)
2013-06-01T23:59:59.000Z
We have undertaken a survey of molecular lines in the 3 mm band toward 57 young stellar objects using the Australia Telescope National Facility Mopra 22 m radio telescope. The target sources were young stellar objects with active outflows (extended green objects (EGOs)) newly identified from the GLIMPSE II survey. We observe a high detection rate (50%) of broad line wing emission in the HNC and CS thermal lines, which combined with the high detection rate of class I methanol masers toward these sources (reported in Paper I) further demonstrates that the GLIMPSE II EGOs are associated with outflows. The physical and kinematic characteristics derived from the 3 mm molecular lines for these newly identified EGOs are consistent with these sources being massive young stellar objects with ongoing outflow activity and rapid accretion. These findings support our previous investigations of the mid-infrared properties of these sources and their association with other star formation tracers (e.g., infrared dark clouds, methanol masers and millimeter dust sources) presented in Paper I. The high detection rate (64%) of the hot core tracer CH{sub 3}CN reveals that the majority of these new EGOs have evolved to the hot molecular core stage. Comparison of the observed molecular column densities with predictions from hot core chemistry models reveals that the newly identified EGOs from the GLIMPSE II survey are members of the youngest hot core population, with an evolutionary time scale of the order of 10{sup 3} yr.
Extended Coronal Heating and Solar Wind Acceleration Over the Solar Cycle
Cranmer, Steven R; Miralles, Mari Paz; van Ballegooijen, Adriaan A
2010-01-01T23:59:59.000Z
This paper reviews our growing understanding of the physics behind coronal heating (in open-field regions) and the acceleration of the solar wind. Many new insights have come from the last solar cycle's worth of observations and theoretical work. Measurements of the plasma properties in the extended corona, where the primary solar wind acceleration occurs, have been key to discriminating between competing theories. We describe how UVCS/SOHO measurements of coronal holes and streamers over the last 14 years have provided clues about the detailed kinetic processes that energize both fast and slow wind regions. We also present a brief survey of current ideas involving the coronal source regions of fast and slow wind streams, and how these change over the solar cycle. These source regions are discussed in the context of recent theoretical models (based on Alfven waves and MHD turbulence) that have begun to successfully predict both the heating and acceleration in fast and slow wind regions with essentially no fre...
Critical thickness of an optimum extended surface characterized by uniform heat transfer coefficient
Leontiou, Theodoros
2015-01-01T23:59:59.000Z
We consider the heat transfer problem associated with a periodic array of extended surfaces (fins) subjected to convection heat transfer with a uniform heat transfer coefficient. Our analysis differs from the classical approach as (i) we consider two-dimensional heat conduction and (ii) the base of the fin is included in the heat transfer process. The problem is modeled as an arbitrary two-dimensional channel whose upper surface is flat and isothermal, while the lower surface has a periodic array of extensions/fins which are subjected to heat convection with a uniform heat transfer coefficient. Using the generalized Schwarz-Christoffel transformation the domain is mapped onto a straight channel where the heat conduction problem is solved using the boundary element method. The boundary element solution is subsequently used to pose a shape optimization problem, i.e. an inverse problem, where the objective function is the normalized Shape Factor and the variables of the optimization are the parameters of the Sch...
García-Bernete, I; Acosta-Pulido, J A; Alonso-Herrero, A; Sánchez-Portal, M; Castillo, M; Pereira-Santaella, M; Esquej, P; González-Martín, O; Díaz-Santos, T; Roche, P; Fisher, S; Povi?, M; García, A M Pérez; Valtchanov, I; Packham, C; Levenson, N A
2015-01-01T23:59:59.000Z
We present subarcsecond resolution infrared (IR) imaging and mid-IR spectroscopic observations of the Seyfert 1.9 galaxy NGC 2992, obtained with the Gemini North Telescope and the Gran Telescopio CANARIAS (GTC). The N-band image reveals faint extended emission out to ~3 kpc, and the PAH features detected in the GTC/CanariCam 7.5-13 micron spectrum indicate that the bulk of this extended emission is dust heated by star formation. We also report arcsecond resolution MIR and far-IR imaging of the interacting system Arp 245, taken with the Spitzer Space Telescope and the Herschel Space Observatory. Using these data, we obtain nuclear fluxes using different methods and find that we can only recover the nuclear fluxes obtained from the subarcsecond data at 20-25 micron, where the AGN emission dominates. We fitted the nuclear IR spectral energy distribution of NGC 2992, including the GTC/CanariCam nuclear spectrum (~50 pc), with clumpy torus models. We then used the best-fitting torus model to decompose the Spitzer/...
Slaying the chimera: a complementarity approach to the extended mind thesis
Farina, Mirko
2012-02-08T23:59:59.000Z
Much of the literature directed at the Extended Mind Thesis (EMT) has revolved around parity issues, focussing on the problem of how to individuate the functional roles and on the relevance of these roles for the production ...
Direct Measurement of the Electron Density of Extended Femtosecond Laser Pulse-Induced Filaments
Chen, Y.-H.; Varma, S.; Antonsen, T. M.; Milchberg, H. M. [Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742 (United States)
2010-11-19T23:59:59.000Z
We present direct time- and space-resolved measurements of the electron density of femtosecond laser pulse-induced plasma filaments. The dominant nonlinearity responsible for extended atmospheric filaments is shown to be field-induced rotation of air molecules.
Distribution of Energy and Convergence to Equilibria in Extended Dissipative Systems
Gallay, Thierry
Distribution of Energy and Convergence to Equilibria in Extended Dissipative Systems Thierry Gallay Institut Fourier Universitâ??e de Grenoble & CNRS BP 74 38402 SaintÂMartinÂd'Hâ??eres, France Thierry.Gallay
Distribution of Energy and Convergence to Equilibria in Extended Dissipative Systems
Gallay, Thierry
Distribution of Energy and Convergence to Equilibria in Extended Dissipative Systems Thierry Gallay Institut Fourier UniversitÂ´e de Grenoble & CNRS BP 74 38402 Saint-Martin-d'H`eres, France Thierry.Gallay
Design, Control and Motion Planning for a Novel Modular Extendable Robotic Manipulator
Yi, Hak 1979-
2012-12-05T23:59:59.000Z
This dissertation discusses an implementation of a design, control and motion planning for a novel extendable modular redundant robotic manipulator in space constraints, which robots may encounter for completing required tasks in small...
Kang, Annie
2012-01-01T23:59:59.000Z
In an effort to enable supply chain visibility for Intel products, the Customer Unit Level Traceability (ULT) Program was formed to help extend Intel's ULT capability to the customer level. Increased traceability of Intel ...
Methodologies to assess potential lifetime limits for extended burnup nuclear fuel
De Vore, Curtis Vincent
1986-01-01T23:59:59.000Z
METHODOLOGIES TO ASSESS POTENTIAL LIFETIME LIMITS FOR EXTENDED BURNUP NUCLEAR FUEL A Thesis by CURTIS VINCENT DE VORE Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 1986 Major Subject: Nuclear Engineering METHODOLOGIES TO ASSESS POTENTIAL LIFETIME LIMITS FOR EXTENDED BURNUP NUCLEAR FUEL A Thesis by CURTIS VINCENT DE VORE Approved as to style and content by: K. L. Peddicord (Chair...
Just, Bradley Eugene
1994-01-01T23:59:59.000Z
DESIGN AND ANALYSIS OF AN EXTENDED KALMAN FILTER BASED NAVIGATOR FOR AN AUTONOMOUS UNDERWATER VEHICLE A Thesis by BRADLEY EUGENE JUST 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 1994 Major Subject: Mechanical Engineering DESIGN AND ANALYSIS OF AN EXTENDED KALMAN FILTER BASED NAVIGATOR FOR AN AUTONOMOUS UNDERWATER VEHICLE A Thesis by BRADLEY EUGENE JUST Submitted to Texas A...
Just, Bradley Eugene
1994-01-01T23:59:59.000Z
DESIGN AND ANALYSIS OF AN EXTENDED KALMAN FILTER BASED NAVIGATOR FOR AN AUTONOMOUS UNDERWATER VEHICLE A Thesis by BRADLEY EUGENE JUST 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 1994 Major Subject: Mechanical Engineering DESIGN AND ANALYSIS OF AN EXTENDED KALMAN FILTER BASED NAVIGATOR FOR AN AUTONOMOUS UNDERWATER VEHICLE A Thesis by BRADLEY EUGENE JUST Submitted to Texas A...
Sparks, Donald L.
ON THE USE OF EXTENDED X-RAY ABSORPTION FINE STRUCTURE SPECTROSCOPY TO DETERMINE THE BONDING Rights Reserved #12;ON THE USE OF EXTENDED X-RAY ABSORPTION FINE STRUCTURE SPECTROSCOPY TO DETERMINE
Impact of Extended Daylight Saving Time on National Energy Consumption Report to Congress
Belzer, D. B.; Hadley, S. W.; Chin, S-M.
2008-10-01T23:59:59.000Z
The Energy Policy Act of 2005 (Pub. L. No. 109-58; EPAct 2005) amended the Uniform Time Act of 1966 (Pub. L. No. 89-387) to increase the portion of the year that is subject to Daylight Saving Time. (15 U.S.C. 260a note) EPAct 2005 extended the duration of Daylight Saving Time in the spring by changing its start date from the first Sunday in April to the second Sunday in March, and in the fall by changing its end date from the last Sunday in October to the first Sunday in November. (15 U.S.C. 260a note) EPAct 2005 also called for the Department of Energy to evaluate the impact of Extended Daylight Saving Time on energy consumption in the United States and to submit a report to Congress. (15 U.S.C. 260a note) This report presents the results of impacts of Extended Daylight Saving Time on the national energy consumption in the United States. The key findings are: (1) The total electricity savings of Extended Daylight Saving Time were about 1.3 Tera Watt-hour (TWh). This corresponds to 0.5 percent per each day of Extended Daylight Saving Time, or 0.03 percent of electricity consumption over the year. In reference, the total 2007 electricity consumption in the United States was 3,900 TWh. (2) In terms of national primary energy consumption, the electricity savings translate to a reduction of 17 Trillion Btu (TBtu) over the spring and fall Extended Daylight Saving Time periods, or roughly 0.02 percent of total U.S. energy consumption during 2007 of 101,000 TBtu. (3) During Extended Daylight Saving Time, electricity savings generally occurred over a three- to five-hour period in the evening with small increases in usage during the early-morning hours. On a daily percentage basis, electricity savings were slightly greater during the March (spring) extension of Extended Daylight Saving Time than the November (fall) extension. On a regional basis, some southern portions of the United States exhibited slightly smaller impacts of Extended Daylight Saving Time on energy savings compared to the northern regions, a result possibly due to a small, offsetting increase in household air conditioning usage. (4) Changes in national traffic volume and motor gasoline consumption for passenger vehicles in 2007 were determined to be statistically insignificant and therefore, could not be attributed to Extended Daylight Saving Time.
Thermodynamics in NJL-like models
A. V. Friesen; Yu. L. Kalinovsky; V. D. Toneev
2011-03-11T23:59:59.000Z
Thermodynamic behavior of conventional Nambu-Jona-Lasinio and Polyakov-loop-extended Nambu-Jona-Lasinio models is compared. A particular attention is paid to the phase diagram in the ($T -\\mu$) plane.
Beyond the Standard Model with Supersymmetry
Sessolo, Enrico Maria
2010-01-01T23:59:59.000Z
We introduce recent research topics in beyond the Standard Model particle physics with Supersymmetry. In the first part we implement a new, extended approach to placing bounds on trilinear R-parity violating couplings. We ...
Broader source: Energy.gov [DOE]
This document is the Energy Conservation Program for Manufactured Housing; Notice to Extend Term and Public Meetings.
Paris-Sud XI, Université de
equivalence and equation solvability problems for groups Gábor Horváth1 and Csaba Szabó2 1 Institute. We prove that the extended equivalence problem is solvable in polynomial time for finite nilpotent, extended equation solvability, extended equivalence, groups 1 Introduction The algorithmic aspects
Sparks, Donald L.
Quick extended x-ray absorption fine structure instrument with millisecond time scale, optimized of quick extended x-ray absorption fine structure QEXAFS and quick x-ray absorption near edge structure- tion spectroscopy XAS was developed in energy dispersive and quick extended x-ray absorption fine
Impacts of the extended-weight coal haul road system. Final research report, December 1995
Pigman, J.; Crabtree, J.; Agent, K.; Graves, C.; Deacon, J.
1995-12-01T23:59:59.000Z
The Extended-Weight Coal Haul Road System, created by the Kentucky Legislature in 1986, consists of all roads which carry over 50,000 tons of coal in a calendar year. Trucks hauling coal on this system are authorized to exceed normal weight limits through the payment of an annual decal fee. A research study was initiated in July of 1992 to analyze the impacts of the extended-weight system. Analyses in this report are based on the following: historical data on coal production and transportation: data from coal decal applications; interviews of legislators, transportation officials, coal company representatives, and coal trucking representatives; newspaper articles; vehicle classification data; analyses of pavement costs; pavement rideability data; and accident data. Primary conclusions include; (1) The extended-weight system has apparently been somewhat successful in accomplishing the objective of enhancing the competitiveness and economic viability of the Kentucky coal industry; (2) Overall accident rates did not increase as a result of implementation of the extended-weight system, but the fatal accident injury rates were significantly higher on the extended-weight system and for trucks operating with the coal decal; (3) Advance-warning flashers have been evaluated and recommended as a means of reducing intersection accidents involving heavy/coal trucks; (4) The coal-decal fee structure results in a net annual loss in Road Fund revenue of approximately $2 million; (5) Forty percent of revenue from decal fees are allocated to counties even though county-maintained roads comprise only eight percent of the extended-weight system; (6) Heavier weights of coal-decal trucks add approximately $9 million annually to the pavement overlay costs; (7) Road users throughout the state are subsidizing the movement of Kentucky coal by participating in the cost of maintaining and improving the highway system; and (8) Possibly reflecting the increased funding of extended-weight roads.
Bauer, Travis LaDell
2009-12-01T23:59:59.000Z
This paper has three goals. The first is to review Shannon's theory of information and the subsequent advances leading to today's statistics-based text analysis algorithms, showing that the semantics of the text is neglected. The second goal is to propose an extension of Shannon's original model that can take into account semantics, where the 'semantics' of a message is understood in terms of the intended or actual changes on the recipient of a message. The third goal is to propose several lines of research that naturally fall out of the proposed model. Each computational approach to solving some problem rests on an underlying model or set of models that describe how key phenomena in the real world are represented and how they are manipulated. These models are both liberating and constraining. They are liberating in that they suggest a path of development for new tools and algorithms. They are constraining in that they intentionally ignore other potential paths of development. Modern statistical-based text analysis algorithms have a specific intellectual history and set of underlying models rooted in Shannon's theory of communication. For Shannon, language is treated as a stochastic generator of symbol sequences. Shannon himself, subsequently Weaver, and at least one of his predecessors are all explicit in their decision to exclude semantics from their models. This rejection of semantics as 'irrelevant to the engineering problem' is elegant and combined with developments particularly by Salton and subsequently by Latent Semantic Analysis, has led to a whole collection of powerful algorithms and an industry for data mining technologies. However, the kinds of problems currently facing us go beyond what can be accounted for by this stochastic model. Today's problems increasingly focus on the semantics of specific pieces of information. And although progress is being made with the old models, it seems natural to develop or extend information theory to account for semantics. By developing such theory, we can improve the quality of the next generation analytical tools. Far from being a mere intellectual curiosity, a new theory can provide the means for us to take into account information that has been to date ignored by the algorithms and technologies we develop. This paper will begin with an examination of Shannon's theory of communication, discussing the contributions and the limitations of the theory and how that theory gets expanded into today's statistical text analysis algorithms. Next, we will expand Shannon's model. We'll suggest a transactional definition of semantics that focuses on the intended and actual change that messages are intended to have on the recipient. Finally, we will examine implications of the model for algorithm development.
The Reliable Hub-and-spoke Design Problem: Models and Algorithms
2011-05-31T23:59:59.000Z
service between nodes and expanding capacities of hubs. [14] extend ... and MA models to derive an optimal network structure that maximizes the expected net-.
Optimal Lyapunov quantum control on two-level systems: convergence and extended techniques
L. C. Wang; S. C. Hou; X. X. Yi; Daoyi Dong; Ian R. Petersen
2013-06-04T23:59:59.000Z
Taking a two-level system as an example, we show that a strong control field may enhance the efficiency of optimal Lyapunov quantum control in [Hou et al., Phys. Rev. A \\textbf{86}, 022321 (2012)] but could decrease its control fidelity. A relationship between the strength of the control field and the control fidelity is established. An extended technique, which combines free evolution and external control, is proposed to improve the control fidelity. We analytically demonstrate that the extended technique can be used to design a control law for steering a two-level system exactly to the target state. In such a way, the convergence of the extended optimal Lyapunov quantum control can be guaranteed.
Search for relationship between duration of the extended solar cycles and amplitude of sunspot cycle
Tlatov, A G
2007-01-01T23:59:59.000Z
Duration of the extended solar cycles is taken into the consideration. The beginning of cycles is counted from the moment of polarity reversal of large-scale magnetic field in high latitudes, occurring in the sunspot cycle n till the minimum of the cycle n+2. The connection between cycle duration and its amplitude is established. Duration of the "latent" period of evolution of extended cycle between reversals and a minimum of the current sunspot cycle is entered. It is shown, that the latent period of cycles evolution is connected with the next sunspot cycle amplitude and can be used for the prognosis of a level and time of a sunspot maximum. The 24-th activity cycle prognosis is done. Long-term behavior of extended cycle's lengths is considered.
X-raying Extended emission and rapid decay of short gamma-ray bursts
Kagawa, Yasuaki; Sawano, Tatsuya; Toyanago, Asuka; Nakamura, Takashi; Takahashi, Keitaro; Kashiyama, Kazumi; Ioka, Kunihito
2015-01-01T23:59:59.000Z
Extended emission is a mystery in short gamma-ray bursts (SGRBs). By making time resolved spectral analyses of brightest eight events observed by {\\it Swift} XRT, we obviously classify the early X-ray emission of SGRBs into two types. One is the extended emission with exponentially rapid decay, which shows significant spectral softening during hundreds seconds since the SGRB trigger and is also detected by {\\it Swift}-BAT. The other is a dim afterglow only showing power-law decay over $10^4$ s. The correlations between the temporal decay and spectral indices of the extended emissions are inconsistent with the $\\alpha$-$\\beta$ correlation expected for the high-latitude curvature emission from a uniform jet. The observed too-rapid decay suggests the emission from a photosphere or a patchy surface, and manifests the stopping central engine via such as magnetic reconnection at the black hole.
Search for relationship between duration of the extended solar cycles and amplitude of sunspot cycle
A. G. Tlatov
2007-03-27T23:59:59.000Z
Duration of the extended solar cycles is taken into the consideration. The beginning of cycles is counted from the moment of polarity reversal of large-scale magnetic field in high latitudes, occurring in the sunspot cycle n till the minimum of the cycle n+2. The connection between cycle duration and its amplitude is established. Duration of the "latent" period of evolution of extended cycle between reversals and a minimum of the current sunspot cycle is entered. It is shown, that the latent period of cycles evolution is connected with the next sunspot cycle amplitude and can be used for the prognosis of a level and time of a sunspot maximum. The 24-th activity cycle prognosis is done. Long-term behavior of extended cycle's lengths is considered.
Impacts of the extended-weight coal haul road system (interim report). Research report
Crabtree, J.D.; Pigman, J.G.; Deacon, J.A.; Agent, K.R.
1993-10-01T23:59:59.000Z
The Extended-Weight Coal Haul Road System, created by Kentucky`s Legislature in 1986, consists of all roads which carry over 50,000 tons of coal in a calendar year. Trucks hauling coal on this system are authorized to exceed normal weight limits through the payment of an annual decal fee. A research study was initiated in July of 1992 to analyze the impacts of the extended-weight system. This interim report prepared after one year of a three-year study, describes the analyses performed thus far and presents preliminary findings, recommendations, and a discussion of future work. Analyses in this report are based on: historical data on coal production and transportation; data from coal decal applications; interviews of legislators, transportation officials, coal company representatives, and coal trucking representatives: newspaper articles; vehicle classification data; a pavement cost analysis; and accident data. Preliminary conclusions include: (1) The extended-weight system has apparently been somewhat successful in accomplishing the primary objectives: to enhance the competitiveness and economic viability of Kentucky`s coal industry and to eliminate the perceived need for cal haulers to violate the law in order to be competitive; (2) Overall accident rates are no higher on the extended-weight system than on other comparable routes, but the fatal accident rate is significantly higher on the extended-weight system; (3) The coal-decal fee structure results in a net annual loss in Road Fund revenue of approximately $2 million; (4) Forty percent of the revenue from decal sales is allocated to the counties, although less than ten percent of the extended-weight system in county-maintained; (5) The heavier weights of coal-decal trucks add approximately $9 million annually to pavement overlay costs and increase other highway costs. (6) Road users throughout the state are subsidizing the movement of Kentucky coal by underwriting the increased costs.
Devices with extended area structures for mass transfer processing of fluids
TeGrotenhuis, Ward E. (Kennewick, WA); Wegeng, Robert S. (Richland, WA); Whyatt, Greg A. (West Richland, WA); King, David L. (Richland, WA); Brooks, Kriston P. (Kennewick, WA); Stenkamp, Victoria S. (Richland, WA)
2009-04-21T23:59:59.000Z
A microchannel device includes several mass transfer microchannels to receive a fluid media for processing at least one heat transfer microchannel in fluid communication with a heat transfer fluid defined by a thermally conductive wall, and at several thermally conductive fins each connected to the wall and extending therefrom to separate the mass transfer microchannels from one another. In one form, the device may optionally include another heat transfer microchannel and corresponding wall that is positioned opposite the first wall and has the fins and the mass transfer microchannels extending therebetween.
On the Irreps of the N-Extended Supersymmetric Quantum Mechanics and Their Fusion Graphs
Francesco Toppan
2006-12-27T23:59:59.000Z
In this talk we review the classification of the irreducible representations of the algebra of the N-extended one-dimensional supersymmetric quantum mechanics presented in hep-th/0511274. We answer some issues raised in hep-th/0611060, proving the agreement of the results here contained with those in hep-th/0511274. We further show that the fusion algebra of the 1D N-extended supersymmetric vacua introduced in hep-th/0511274 admits a graphical presentation. The N=2 graphs are here explicitly presented for the first time.
Advanced properties of extended plasmas for efficient high-order harmonic generation
Ganeev, R. A. [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan) [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan); Physics Department, Voronezh State University, Voronezh 394006 (Russian Federation); Suzuki, M.; Kuroda, H. [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan)] [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan)
2014-05-15T23:59:59.000Z
We demonstrate the advanced properties of extended plasma plumes (5?mm) for efficient harmonic generation of laser radiation compared with the short lengths of plasmas (?0.3–0.5?mm) used in previous studies. The harmonic conversion efficiency quadratically increased with the growth of plasma length. The studies of this process along the whole extreme ultraviolet range using the long plasma jets produced on various metal surfaces, particularly including the resonance-enhanced laser frequency conversion and two-color pump, are presented. Such plasmas could be used for the quasi-phase matching experiments by proper modulation of the spatial characteristics of extended ablating area and formation of separated plasma jets.
Role of noise operators on two-photon correlations in an extended coherent Raman medium
Ooi, C. H. Raymond; Zubairy, M. Suhail.
2007-01-01T23:59:59.000Z
Role of noise operators on two-photon correlations in an extended coherent Raman medium C. H. Raymond Ooi1,2,3,4,* and M. Suhail Zubairy3,5 1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, 305-701 Korea 2Max... & Aerospace Engineering, Princeton University, New Jersey 08544, USA 5Texas A&M University at Qatar, Education City, P.O. Box 23874, Doha, Qatar #1;Received 8 January 2007; published 29 May 2007#2; An extended medium driven in a double Raman configuration...
Chemical Reactor Models of Digestion Modulation
Logan, David
Chemical Reactor Models of Digestion Modulation William Wolesensky & J. David Logan Department give an overview of the application of chemical reactor theory to models of digestion processes and indicate how those models extend to eco-physiological questions of modulation of digestion and feeding
Switching algorithms for extending battery life in Electric Vehicles Ron Adany a,*, Doron Aurbach b
Kraus, Sarit
27 December 2012 Keywords: Electric Vehicles (EV) Switching algorithms Battery life Lithium ionSwitching algorithms for extending battery life in Electric Vehicles Ron Adany a,*, Doron Aurbach b Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel h i g h l i g h t s battery's life
Rincon-Mora, Gabriel A.
-film lithium and lithium-ion batteries," Solid State Ionics, vol. 135, no. 1-4, pp. 33-45, Nov. 2000. [3] C-CELL ENERGY HARVESTER MIXER CHARGER SUPPLY IC THIN-FILM LITHIUM-ION BATTERY Fig. 1. Integrated Hybrid Power is to exploit the power-delivery advantages of Li Ion batteries and extend their life by drawing energy from
Extending the REA-DSL by the Planning Layer of the REA Ontology
future events "are scheduled" or "are planned" by commitments. Now, our REA-DSL covers all basic concepts to predict the financial future of a company and, thereby, helps managers in their decision making. In orderExtending the REA-DSL by the Planning Layer of the REA Ontology Dieter Mayrhofer and Christian
What hides behind extended periods of youth unemployment in Bosnia and Herzegovina?
Paris-Sud XI, UniversitÃ© de
What hides behind extended periods of youth unemployment in Bosnia and Herzegovina? Evidence from This paper provides the first empirical analysis on youth unemployment duration in Bosnia and ongoing economic and political reforms, the old economic structure and patterns of em- ployment in Bosnia
Extending the Zero-Safe approach to Coloured, Recon gurable and Dynamic Nets ?
Bruni, Roberto
Extending the Zero-Safe approach to Coloured, Recon#12;gurable and Dynamic Nets ? Roberto Bruni their execution). Starting from zero-safe nets | a well-studied extension of Place/Transition Petri nets | we show how the zero-safe approach can be smoothly applied to a hierarchy of nets of increasing
BIOSIGNAL 2004, extended abstract Complex Analysis of Intracranial Hypertension in Traumatic
BIOSIGNAL 2004, extended abstract Complex Analysis of Intracranial Hypertension in Traumatic Brain from a stable state of normal ICP (hypertension (ICH; ICP > 25 mm of intracranial hypertension: (1) the difference between the minimum value in the ICH region and the maximum value
Ultrafast extended x-ray absorption fine structure ,,EXAFS...--theoretical considerations
Cao, Jianshu
13Â20 to generate ultrafast x-ray pulses, however, the prospect of ultrafast EXAFS seems encouragingUltrafast extended x-ray absorption fine structure ,,EXAFS...--theoretical considerations Frank L by the recent experimental demonstration of ultrafast x-ray absorption spectroscopy, we present a framework
Proof of Activity: Extending Bitcoin's Proof of Work via Proof of Stake Iddo Bentov
Proof of Activity: Extending Bitcoin's Proof of Work via Proof of Stake Iddo Bentov Computer Mizrahi chromawallet.com alex.mizrahi@gmail.com Meni Rosenfeld Israeli Bitcoin Association meni@bitcoin.org.il Abstract We propose a new protocol for a cryptocurrency, that builds upon the Bitcoin protocol by combining
Joint Turbo Equalization and Channel Estimation with Fixed-Lag Extended Kalman Filtering
Wong, Tan F.
Joint Turbo Equalization and Channel Estimation with Fixed-Lag Extended Kalman Filtering Xin Li. In the receiver, a fixed-lag Kalman equalizer jointly estimates the channel and equalizes the data symbols channel estimators employing least mean squares (LMS), recursive least squares (RLS) and Kalman filtering
QoS Negotiation in a Robotics Environment (Extended Klara Nahrstedt and Jonathan Smith \\Lambda
Nahrstedt, Klara
QoS Negotiation in a Robotics Environment (Extended Abstract) Klara Nahrstedt and Jonathan Smith, and by HewlettÂPackard. 1 This is our current telerobotics system configuration. 1 #12; 2. The media used in our is currently 5 frames/s. From the application properties and media requirements results that we need guaranteed
TITLE: Multimedia Over the Internet DURATION: Half day (can be extended to full-day)
Furht, Borko
SEMINAR TITLE: Multimedia Over the Internet DURATION: Half day (can be extended to full-day) INSTRUCTOR: Borko Furht, Professor and Director of NSF Multimedia Laboratory Department of Computer Science-2800 Email: borko@cse.fau.edu OBJECTIVE: Multimedia coupled with information superhighways allows
Elevated CO2 levels affect development, motility, and fertility and extend life
Morimoto, Richard
Elevated CO2 levels affect development, motility, and fertility and extend life span August 5, 2008) Hypercapnia (high CO2 levels) occurs in a number of lung diseases and it is associated the response to nonanesthetic CO2 levels and show that levels exceeding 9% induce aberrant motility
YASIR: A Low-Latency, High-Integrity Security Retrofit for Legacy SCADA Systems (Extended Version)
YASIR: A Low-Latency, High-Integrity Security Retrofit for Legacy SCADA Systems (Extended Version security, and yet incurs minimal end-to-end communication latency. Keywords: SCADA network security, bump links between devices in legacy Supervisory Con- trol And Data Acquisition (SCADA) systems, on which
Marginally trapped surfaces in L4 an extended Weierstrass-Bryant representation
GÃ¡lvez, JosÃ© Antonio
Marginally trapped surfaces in L4 and an extended Weierstrass-Bryant representation Juan A. Aledoa-30203 Cartagena, Murcia, Spain. e-mail: pablo.mira@upct.es Date: February 2, 2005 Keywords: Bryant surfaces in L3, and the Bryant repre- sentation for mean curvature one surfaces in the hyperbolic 3-space
Lai, Ying-Cheng
Basins of coexistence and extinction in spatially extended ecosystems of cyclically competing species Xuan Ni,1 Rui Yang,1,a Wen-Xu Wang,1 Ying-Cheng Lai,1,2,3 and Celso Grebogi3 1 School of species coexistence. In this pursuit almost all exist- ing works focus on the relevant dynamical behaviors
MU FAPRI reports economic impact of extending ethanol tax credit, tariff Contact:Duane Dailey
Noble, James S.
. Â Extending the current ethanol tax credit and tariff would boost corn-based fuel production -- and corn for corn as an ethanol fuel source would expand corn acreage by 1.7 million acres, said Seth Meyer, MU for blended fuel at the pump. "At the same time, blenders can pay more to ethanol plants that in turn pay
Extended scaling factors for in situ cosmogenic nuclides: New measurements at low latitude
Zreda, Marek
Extended scaling factors for in situ cosmogenic nuclides: New measurements at low latitude Darin by the intensity of energetic cosmic-ray nucleons, which changes rapidly with elevation. An incomplete knowledge, and that there has been an incomplete mapping of nucleon fluxes at high RC (low geomagnetic latitude). We report new
Extending the Reach of a Rod Injected into a Cylinder Through Distributed Vibration
Reis, Pedro Miguel
of rods fo- cused on the case of compression of a fixed length of rod inside of a frictionless cylinder [7Extending the Reach of a Rod Injected into a Cylinder Through Distributed Vibration Jay T. MIller. The injection speed (be- low a critical value that we uncover), as well as the ampli- tude and frequency
Extending the TOKENCMP Cache Coherence Protocol for Low Overhead Fault Tolerance
Acacio, Manuel
, the reliability of electronic components is never perfect. Electronic components are subject to several types sufficiently reliable CMPs. In this work, we present a coherence protocol aimed at dealing with transient reliable. In particular, our proposal extends a token-based cache coherence protocol so that no data can
Ortiz, Rudy M.
in salt water and fed lettuce, which is consistent with a lack of mariposia. Manatees in fresh water drankThe habitat range of sirenians extends from strictly fresh water (Amazonian manatee, Trichechus. This flexibility suggests that drinking both fresh and salt water may be common in this species. However, drinking
Equilibrium free energy estimates based on nonequilibrium work relations and extended dynamics
Sun, Sean
Equilibrium free energy estimates based on nonequilibrium work relations and extended dynamics the equilibrium free energy and the nonequilibrium work is useful for computer simulations. In this paper, we exploit the fact that the free energy is a state function, independent of the pathway taken to change
The ULIRG NGC 6240: Luminous extended Xray emission and evidence for an AGN
Greiner, Jochen
spectrum can be well fit by emission from two components in roughly equal proportions: a thermal optically for the formation of this AGN. However, the luÂ minosity in the remaining extended thermal component is still et al. 1997). Within this core most of the ultiÂ mate enigmatic power source of the FIR radiation
Extended Soft Binding Mean Spherical- Contact Probability Approximation for Hard Ions
Blum, L. [Department of Mathematics, Rutgers University (United States); Arias, M.; Veloz, D. V. Perez [Physics Department, University of Puerto Rico (Puerto Rico)
2009-03-09T23:59:59.000Z
We propose a new analytical theory of electrolytes that extends the range of the Mean Spherical Approximation (MSA) to include extremely high charges [1, 2, 3, 4, 5]. In the MSA the thermodynamics and structure of the most general electrolyte are given in terms of a single screening parameter {gamma}, [1] which is obtained from the simple algebraic equation.
PLM: Fast Convergence for Cumulative Layered Multicast Transmission Schemes (extended version)
Legout, Arnaud
PLM: Fast Convergence for Cumulative Layered Multicast Transmission Schemes (extended version) A the properties of a new multicast congestion control protocol (called PLM) for audio/video and file transfer. We evaluated PLM for a large variety of scenarios and show that it converges fast to the optimal link
Legout, Arnaud
PLM: Fast Convergence for Cumulative Layered Multicast Transmission Schemes (extended version the properties of a new multicast congestion control protocol (called PLM) for audio/video and file transfer. We evaluated PLM for a large variety of scenarios and show that it converges fast to the optimal link
Extended Product and Process Analysis aNd Design 20 & 21 March 2008
Boyer, Edmond
and to conceive a roadmap for future trainings of various employees of the firm during the lifecycle of a product of the product lifecycle. The use of knowledge as an element of differentiation strategy is a quite complexExtended Product and Process Analysis aNd Design Bordeaux 20 & 21 March 2008 Design for teaching
Rows x1 x2 y Response: y (for extended fake MLR data)
Vardeman, Stephen B.
;Response: y (for extended fake MLR data) Summary of Fit RSquare RSquare Adj Root Mean Square Error Mean of Response Observations (or Sum Wgts) 0.882812 0.835937 0.75 2 8 Lack of Fit Source Lack of Fit Pure Error.8333 Prob>F 0.0047 Press 6.821378005 x1 x2 2 #12;
Using WordNet to Extend FrameNet Coverage Richard Johansson and Pierre Nugues
Nugues, Pierre
Using WordNet to Extend FrameNet Coverage Richard Johansson and Pierre Nugues Department to address the prob- lem of sparsity in the FrameNet lexical database. The first method is based on the idea using a WordNet- based variant of the Lesk metric. The sec- ond method uses the sequence of synsets
Global Structure and Flexibility of Hairpin Ribozymes with Extended Terminal Helices
Walter, Nils G.
Global Structure and Flexibility of Hairpin Ribozymes with Extended Terminal Helices Dietmar Burlington, VT 05405, USA Global structure and Â¯exibility of three different hairpin ribozyme constructs have compact structures. The 72 bp RNA reference under corre- sponding conditions did not show a dependence
Optimal convergence analysis for the eXtended Finite Element Serge Nicaise 1
Paris-Sud XI, Université de
Optimal convergence analysis for the eXtended Finite Element Method Serge Nicaise 1 , Yves Renard 2Xtended Finite Element Method (Xfem), namely the Xfem with a cut-off function and the stan- dard Xfem finite element method, error estimates, stress intensity factors. 1 Introduction Inspired by the Pufem
He, Zhihai "Henry"
-Rate-Distortion Optimization Zhihai He, Wenye Cheng, and Xi Chen £ Department of Electrical and Computer Engineering University framework to save the data processing energy and extend the operational lifetime of portable video communication devices. Video compression is computationally intensive and energy-consuming. However, portable
USING AN EXTENDED SUFFIX TREE TO SPEED-UP SEQUENCE ALIGNMENT
Wu, Xindong
USING AN EXTENDED SUFFIX TREE TO SPEED-UP SEQUENCE ALIGNMENT Divya R. Singh Software Engineer biology is the alignment of a given query sequence and sequences in a database to find similar (locally or globally) sequences from the database to the query. Many heuristic algorithms for this problem are based
Analysis of Property-Preservation Capabilities of the ROX and ESh Hash Domain Extenders
Analysis of Property-Preservation Capabilities of the ROX and ESh Hash Domain Extenders Mohammad domain extension trans- forms are the Ramdom-Oracle-XOR (ROX) transform and the Enveloped Shoup (ESh showed that ESh is capable of preserving five important security notions; namely CR, message
EXTENDING THE CONCEPTS OF RETURN PERIOD AND RETURN LEVEL TO A CHANGING CLIMATE
Katz, Richard
-Stationarity in Extremes (3) Risk Communication under Stationarity (4) Risk Communication under Climate Change (5;#12;(4) Risk Communication Under Climate Change Â· One Approach -- "Effective" return level Permit "return levelEXTENDING THE CONCEPTS OF RETURN PERIOD AND RETURN LEVEL TO A CHANGING CLIMATE Rick Katz Institute
AN EXTENDED FIELD OF CRATER STRUCTURES IN EGYPT: OBSERVATIONS AND HYPOTHESES. Ph. Pail-, B. Reynard2
Paris-Sud XI, Université de
AN EXTENDED FIELD OF CRATER STRUCTURES IN EGYPT: OBSERVATIONS AND HYPOTHESES. Ph. Pail- lou1 , B Analysis: Having initially located a possible crater field in southwestern Egypt using JERS- 1 radar images, 225 × 215 km in size, is located in Southwest Egypt, in the vicinity of the Gilf Kebir plateau (Figure
Extending Brickell-Davenport Theorem to Non-Perfect Secret Sharing Schemes
Extending Brickell-Davenport Theorem to Non-Perfect Secret Sharing Schemes Oriol Farr`as1 University, Singapore December 18, 2012 Abstract One important result in secret sharing is the Brickell-Davenport Theorem: every ideal perfect secret sharing scheme defines a matroid that is uniquely determined
Jiao, Jiu Jimmy
Tide-induced groundwater fluctuation in a coastal leaky confined aquifer system extending under, China Abstract. This paper presents the analytical solution of groundwater response to tidal fluctuation length, dimensionless leakage, and tidal efficiency on the groundwater level fluctuations in the inland
J. GUIDANCE, VOL. 23, NO. 4: ENGINEERING NOTES 759 Nonlinear Life-Extending Control
Ray, Asok
J. GUIDANCE, VOL. 23, NO. 4: ENGINEERING NOTES 759 Nonlinear Life-Extending Control of a Rocket Engine Carl F. Lorenzo¤ NASA John Glenn Research Center at Lewis Field, Cleveland, Ohio 44135 and Michael. Introduction AROCKET engine has a number of critical components that operate close to mechanical design limits
Extended papers from NPAR 2010 Stylized ambient displays of digital media collections
Collomosse, John
Extended papers from NPAR 2010 Stylized ambient displays of digital media collections Tinghuai Wang collections of personal digital media. However, once captured, this media is infrequently accessed and often lies dormant on users' PCs. We present a system to breathe life into home digital media collections
Paris-Sud XI, Université de
Estimation of vehicle lateral tire-road forces: a comparison between extended and unscented Kalman of accident data reveals that losing the vehicle control is responsible for a huge proportion of car accidents. Preventing such kind of accidents using vehicle control systems, requires certain input data concerning
Derivation of Extended Kalman Filtering and Smoothing Equations Byron M. Yu
Yu, Byron
dynamical systems can be performed via local linearization of the nonlinearities. This Extended Kalman Introduction We consider nonlinear dynamical systems of the following form: xt+1 = ft(xt) + wt (1) yt = gt-distributed with mean 1 and variance V1. As in [3], we assume that the parameters of the nonlinear dynamical system
Extending The Methodology Of X-ray Crystallography To Allow X-ray
Miao, Jianwei "John"
, the radiation damage. While the radiation damage problem can be mitigated somewhat by using cryogenic techniques resolution without serious radiation damage to the specimens. Although X-ray crystallography becomesExtending The Methodology Of X-ray Crystallography To Allow X-ray Microscopy Without X-ray Optics
Schur multipliers of functions extended by zero Jimmy Dillies & Julien Giol
Dillies, Jimmy
Schur multipliers of functions extended by zero Jimmy Dillies & Julien Giol November 5, 2006) t gC jimmy@math.tamu.edu - giol@math.tamu.edu 1 #12;The domains and ranges are 1 : C H [G:H] 1 , =2
Representation and Self-Configuration of Physical Entities in Extended Smart Grid Perimeter
Paris-Sud XI, Université de
. We describe these mechanisms and their implementation on examples from the home domain. Index Terms--Smart1 Representation and Self-Configuration of Physical Entities in Extended Smart Grid Perimeter Zheng of Smart Grids to Smart Energy Management Systems in relevant domains, we propose a framework and a set
Johnson, Chris
-1- Extending the Borders of Accident Investigation: Applying Novel Analysis Techniques to the Loss. In consequence, it is becoming increasingly difficult to identify the causes of incidents and accidents back to the development of a number of novel accident investigation techniques. Most of these approaches are intended
Modeling Compressed Turbulence
Israel, Daniel M. [Los Alamos National Laboratory
2012-07-13T23:59:59.000Z
From ICE to ICF, the effect of mean compression or expansion is important for predicting the state of the turbulence. When developing combustion models, we would like to know the mix state of the reacting species. This involves density and concentration fluctuations. To date, research has focused on the effect of compression on the turbulent kinetic energy. The current work provides constraints to help development and calibration for models of species mixing effects in compressed turbulence. The Cambon, et al., re-scaling has been extended to buoyancy driven turbulence, including the fluctuating density, concentration, and temperature equations. The new scalings give us helpful constraints for developing and validating RANS turbulence models.
EXTENDED HOT HALOS AROUND ISOLATED GALAXIES OBSERVED IN THE ROSAT ALL-SKY SURVEY
Anderson, Michael E.; Bregman, Joel N. [Department of Astronomy, University of Michigan, Ann Arbor, MI 48109 (United States)] [Department of Astronomy, University of Michigan, Ann Arbor, MI 48109 (United States); Dai, Xinyu, E-mail: michevan@umich.edu, E-mail: jbregman@umich.edu, E-mail: xdai@ou.edu [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019 (United States)] [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019 (United States)
2013-01-10T23:59:59.000Z
We place general constraints on the luminosity and mass of hot X-ray-emitting gas residing in extended 'hot halos' around nearby massive galaxies. We examine stacked images of 2165 galaxies from the 2MASS Isolated Galaxy Catalog as well as subsets of this sample based on galaxy morphology and K-band luminosity. We detect X-ray emission at high confidence (ranging up to nearly 10{sigma}) for each subsample of galaxies. The average L{sub X} within 50 kpc is 1.0 {+-} 0.1 (statistical) {+-}0.2 (systematic) Multiplication-Sign 10{sup 40} erg s{sup -1}, although the early-type galaxies are more than twice as luminous as the late-type galaxies. Using a spatial analysis, we also find evidence for extended emission around five out of seven subsamples (the full sample, the luminous galaxies, early-type galaxies, luminous late-type galaxies, and luminous early-type galaxies) at 92.7%, 99.3%, 89.3%, 98.7%, and 92.1% confidence, respectively. Several additional lines of evidence also support this conclusion and suggest that about 1/2 of the total emission is extended, and about 1/3 of the extended emission comes from hot gas. For the sample of luminous galaxies, which has the strongest evidence for extended emission, the average hot gas mass is 4 Multiplication-Sign 10{sup 9} M {sub Sun} within 50 kpc and the implied accretion rate is 0.4 M {sub Sun} yr{sup -1}.
Equivalent Circuit Modeling of Hysteresis Motors
Nitao, J J; Scharlemann, E T; Kirkendall, B A
2009-08-31T23:59:59.000Z
We performed a literature review and found that many equivalent circuit models of hysteresis motors in use today are incorrect. The model by Miyairi and Kataoka (1965) is the correct one. We extended the model by transforming it to quadrature coordinates, amenable to circuit or digital simulation. 'Hunting' is an oscillatory phenomenon often observed in hysteresis motors. While several works have attempted to model the phenomenon with some partial success, we present a new complete model that predicts hunting from first principles.
Alexander E. Hramov; Alexey A. Koronovskii; Vladimir A. Maximenko; Olga I. Moskalenko
2013-02-17T23:59:59.000Z
The spectrum of Lyapunov exponents is powerful tool for the analysis of the complex system dynamics. In the general framework of nonlinear dynamical systems a number of the numerical technics have been developed to obtain the spectrum of Lyapunov exponents for the complex temporal behavior of the systems with a few degree of freedom. Unfortunately, these methods can not apply directly to analysis of complex spatio-temporal dynamics in plasma devices which are characterized by the infinite phase space, since they are the spatially extended active media. In the present paper we propose the method for the calculation of the spectrum of the spatial Lyapunov exponents (SLEs) for the spatially extended beam-plasma systems. The calculation technique is applied to the analysis of chaotic spatio-temporal oscillations in three different beam-plasma model: (1) simple plasma Pierce diode, (2) coupled Pierce diodes, and (3) electron-wave system with backward electromagnetic wave. We find an excellent agreement between the system dynamics and the behavior of the spectrum of the spatial Lyapunov exponents. Along with the proposed method, the possible problems of SLEs calculation are also discussed. It is shown that for the wide class of the spatially extended systems the set of quantities included in the system state for SLEs calculation can be reduced using the appropriate feature of the plasma systems.
Hramov, Alexander E. [Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya str., 83, Saratov 410012 (Russian Federation); Saratov State Technical University, Politechnicheskaja str., 77, Saratov 410054 (Russian Federation); Koronovskii, Alexey A.; Maximenko, Vladimir A.; Moskalenko, Olga I. [Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya str., 83, Saratov 410012 (Russian Federation)
2012-08-15T23:59:59.000Z
The spectrum of Lyapunov exponents is powerful tool for the analysis of the complex system dynamics. In the general framework of nonlinear dynamics, a number of the numerical techniques have been developed to obtain the spectrum of Lyapunov exponents for the complex temporal behavior of the systems with a few degree of freedom. Unfortunately, these methods cannot be applied directly to analysis of complex spatio-temporal dynamics of plasma devices which are characterized by the infinite phase space, since they are the spatially extended active media. In the present paper, we propose the method for the calculation of the spectrum of the spatial Lyapunov exponents (SLEs) for the spatially extended beam-plasma systems. The calculation technique is applied to the analysis of chaotic spatio-temporal oscillations in three different beam-plasma model: (1) simple plasma Pierce diode, (2) coupled Pierce diodes, and (3) electron-wave system with backward electromagnetic wave. We find an excellent agreement between the system dynamics and the behavior of the spectrum of the spatial Lyapunov exponents. Along with the proposed method, the possible problems of SLEs calculation are also discussed. It is shown that for the wide class of the spatially extended systems, the set of quantities included in the system state for SLEs calculation can be reduced using the appropriate feature of the plasma systems.
M. Villar-Martin; C. N. Tadhunter; N. E. Clark
1997-01-06T23:59:59.000Z
We have compared the UV line ratios of a sample of very high redshift radio galaxies with shock and AGN photoionization models, with the goal of determining the balance between jet-induced shocks and AGN illumination in the extended emission line regions. We find that the UV line ratios cannot be explained in terms of photoionization of solar abundance gas by the classical power law of index $\\alpha=$-1.5, which successfully reproduces the general trends defined by the optical line ratios of low redshift radio galaxies. Pure shock models also provide a poor fit to the data. However, photoionization by a power law of index -1.0 provides an excellent fit to the UV line ratios. This suggests that the ionizing continuum spectral shape may depend on radio luminosity and/or redshift, such that it becomes harder as the radio power and/or redshift increase. However, an alternative possibility is that we are seeing the first signs of chemical evolution in these objects, since a power-law of index -1.5 with low metallicity also provides a good fit to the data. We further show that the UV line ratios provide a sensitive test of the ionization mechanism for the lower ionization conditions prevalent in some low redshift jet-cloud interaction candidates.
Santopinto, E
2015-01-01T23:59:59.000Z
In this contribution, we briefly discuss the results for charmonium and bottomonium spectra with self-energy corrections in the unquenched quark model, due to the coupling to the meson-meson continuum. The UQM formalism can be extended to include also the effects of hybrid mesons, i.e. hybrid loops. Finally, we discuss the results of a calculation of hybrid mesons spectrum in Coulomb Gauge QCD.
E. Santopinto; J. Ferretti
2015-03-10T23:59:59.000Z
In this contribution, we briefly discuss the results for charmonium and bottomonium spectra with self-energy corrections in the unquenched quark model, due to the coupling to the meson-meson continuum. The UQM formalism can be extended to include also the effects of hybrid mesons, i.e. hybrid loops. Finally, we discuss the results of a calculation of hybrid mesons spectrum in Coulomb Gauge QCD.
Extending Penning trap mass measurements with SHIPTRAP to the heaviest elements
Block, M.; Ackermann, D.; Herfurth, F.; Hofmann, S. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, 64291 Darmstadt (Germany); Blaum, K. [Max-Planck-Institut fuer Kernphysik, 69117 Heidelberg, Germany and Ruprecht-Karls-Universitaet, 69120 Heidelberg (Germany); Droese, C.; Marx, G.; Schweikhard, L. [Ernst-Moritz-Arndt-Universitaet, 17487 Greifswald (Germany); Duellmann, Ch. E. [Johannes Gutenberg-Universitaet, 55099 Mainz, Germany and GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, 64291 Darmstadt, Germany and Helmholtz-Institut Mainz, 55099 Mainz (Germany); Eibach, M. [Ruprecht-Karls-Universitaet, 69120 Heidelberg, Germany and Johannes Gutenberg-Universitaet, 55099 Mainz (Germany); Eliseev, S. [Max-Planck-Institut fuer Kernphysik, 69117 Heidelberg (Germany); Haettner, E.; Plass, W. R.; Scheidenberger, C. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, 64291 Darmstadt, Germany and Justus-Liebig-Universitaet, 35392 Giessen (Germany); Hessberger, F. P. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, 64291 Darmstadt, Germany and Helmholtz-Institut Mainz, 55099 Mainz (Germany); Ramirez, E. Minaya [Helmholtz-Institut Mainz, 55099 Mainz, Germany and GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, 64291 Darmstadt (Germany); Nesterenko, D. [Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg (Russian Federation); and others
2013-03-19T23:59:59.000Z
Penning-trap mass spectrometry of radionuclides provides accurate mass values and absolute binding energies. Such mass measurements are sensitive indicators of the nuclear structure evolution far away from stability. Recently, direct mass measurements have been extended to the heavy elements nobelium (Z=102) and lawrencium (Z=103) with the Penning-trap mass spectrometer SHIPTRAP. The results probe nuclear shell effects at N=152. New developments will pave the way to access even heavier nuclides.
Extended Weyl-Heisenberg algebra, phase operator, unitary depolarizers and generalized Bell states
M. Daoud; E. H. El Kinani
2012-10-29T23:59:59.000Z
Finite dimensional representations of extended Weyl-Heisenberg algebra are studied both from mathematical and applied viewpoints. They are used to define unitary phase operator and the corresponding eigenstates (phase states). It is also shown that the unitary depolarizers can be constructed in a general setting in terms of phase operators. Generation of generalized Bell states using the phase operator is presented and their expressions in terms of the elements of mutually unbiased bases are given.
Convex-roof extended negativity as an entanglement measure for bipartite quantum systems
Soojoon Lee; Dong Pyo Chi; Sung Dahm Oh; Jaewan Kim
2003-10-04T23:59:59.000Z
We extend the concept of the negativity, a good measure of entanglement for bipartite pure states, to mixed states by means of the convex-roof extension. We show that the measure does not increase under local quantum operations and classical communication, and derive explicit formulae for the entanglement measure of isotropic states and Werner states, applying the formalism presented by Vollbrecht and Werner [Phys. Rev. A {\\bf 64}, 062307 (2001)].
TESLA-FEL 2004-05 The Potential for Extending the Spectral
TESLA-FEL 2004-05 The Potential for Extending the Spectral Range Accessible to the European X electron beam energy of 17.5 GeV can be covered by operating the SASE FEL with three undulators which have. There are at least two possible sources of the VUV radiation associated with the X-ray FEL: the "low (2.5 GeV) energy
Beyond the skin bag: on the moral responsibility of extended agencies
Hanson, F. Allan
2009-03-01T23:59:59.000Z
and extended agency The view of the subject as only the human individual is known as methodological individualism. This theory holds that subjects are human beings entirely contained in their “skin bags” (Clark 2003), that maintain their identity... to ride a bicycle. “Be careful not to run into people or things, don’t crash your bike or hurt yourself, and especially don’t ride into the street without looking.” Her responsibility with the bicycle is, however, considerably less momentous than...
Radar cross section of triangular trihedral reflector with extended bottom plate.
Brock, Billy C.; Doerry, Armin Walter
2009-05-01T23:59:59.000Z
Trihedral corner reflectors are the preferred canonical target for SAR performance evaluation for many radar development programs. The conventional trihedrals have problems with substantially reduced Radar Cross Section (RCS) at low grazing angles, unless they are tilted forward, but in which case other problems arise. Consequently there is a need for better low grazing angle performance for trihedrals. This is facilitated by extending the bottom plate. A relevant analysis of RCS for an infinite ground plate is presented. Practical aspects are also discussed.
Econometric Models of Asymmetric Ascending Auctions Department of Economics
Niebur, Ernst
Econometric Models of Asymmetric Ascending Auctions Han Hong Department of Economics Princeton econometric models of ascending (English) auctions which allow for both bid- der asymmetries as well as common an econometric model, thus extending the literature on structural estimation of auction models. Finally
Graphical modelling of process algebras with Stephen Gilmore
Gilmore, Stephen
Graphical modelling of process algebras with DrawNET Stephen Gilmore Laboratory for Foundations languages of process algebras and other state-based modelling formalisms. We have extended the DrawNET modelling tool to facilitate the design of PEPA net models [1] in addition to its existing support for Petri
Assessment of the use of extended burnup fuel in light water power reactors
Baker, D.A.; Bailey, W.J.; Beyer, C.E.; Bold, F.C.; Tawil, J.J.
1988-02-01T23:59:59.000Z
This study has been conducted by Pacific Northwest Laboratory for the US Nuclear Regulatory Commission to review the environmental and economic impacts associated with the use of extended burnup nuclear fuel in light water power reactors. It has been proposed that current batch average burnup levels of 33 GWd/t uranium be increased to above 50 GWd/t. The environmental effects of extending fuel burnup during normal operations and during accident events and the economic effects of cost changes on the fuel cycle are discussed in this report. The physical effects of extended burnup on the fuel and the fuel assembly are also presented as a basis for the environmental and economic assessments. Environmentally, this burnup increase would have no significant impact over that of normal burnup. Economically, the increased burnup would have favorable effects, consisting primarily of a reduction: (1) total fuel requirements; (2) reactor downtime for fuel replacement; (3) the number of fuel shipments to and from reactor sites; and (4) repository storage requirements. 61 refs., 4 figs., 27 tabs.
Eisaku Sakane; Toshiharu Kawai
2002-09-30T23:59:59.000Z
In an extended, new form of general relativity, which is a teleparallel theory of gravity, we examine the energy-momentum and angular momentum carried by gravitational wave radiated from Newtonian point masses in a weak-field approximation. The resulting wave form is identical to the corresponding wave form in general relativity, which is consistent with previous results in teleparallel theory. The expression for the dynamical energy-momentum density is identical to that for the canonical energy-momentum density in general relativity up to leading order terms on the boundary of a large sphere including the gravitational source, and the loss of dynamical energy-momentum, which is the generator of \\emph{internal} translations, is the same as that of the canonical energy-momentum in general relativity. Under certain asymptotic conditions for a non-dynamical Higgs-type field $\\psi^{k}$, the loss of ``spin'' angular momentum, which is the generator of \\emph{internal} $SL(2,C)$ transformations, is the same as that of angular momentum in general relativity, and the losses of canonical energy-momentum and orbital angular momentum, which constitute the generator of Poincar\\'{e} \\emph{coordinate} transformations, are vanishing. The results indicate that our definitions of the dynamical energy-momentum and angular momentum densities in this extended new general relativity work well for gravitational wave radiations, and the extended new general relativity accounts for the Hulse-Taylor measurement of the pulsar PSR1913+16.
EXTENDED STAR FORMATION IN THE INTERMEDIATE-AGE LARGE MAGELLANIC CLOUD STAR CLUSTER NGC 2209
Keller, Stefan C.; Mackey, A. Dougal; Da Costa, Gary S. [Research School of Astronomy and Astrophysics, Australian National University, Canberra (Australia)
2012-12-10T23:59:59.000Z
We present observations of the 1 Gyr old star cluster NGC 2209 in the Large Magellanic Cloud made with the GMOS imager on the Gemini South Telescope. These observations show that the cluster exhibits a main-sequence turnoff that spans a broader range in luminosity than can be explained by a single-aged stellar population. This places NGC 2209 amongst a growing list of intermediate-age (1-3 Gyr) clusters that show evidence for extended or multiple epochs of star formation of between 50 and 460 Myr in extent. The extended main-sequence turnoff observed in NGC 2209 is a confirmation of the prediction in Keller et al. made on the basis of the cluster's large core radius. We propose that secondary star formation is a defining feature of the evolution of massive star clusters. Dissolution of lower mass clusters through evaporation results in only clusters that have experienced secondary star formation surviving for a Hubble time, thus providing a natural connection between the extended main-sequence turnoff phenomenon and the ubiquitous light-element abundance ranges seen in the ancient Galactic globular clusters.
Suzaku Spectroscopy of the Extended X-Ray Emission in M17
Yoshiaki Hyodo; Masahiro Tsujimoto; Kenji Hamaguchi; Katsuji Koyama; Shunji Kitamoto; Yoshitomo Maeda; Yohko Tsuboi; Yuichiro Ezoe
2007-07-27T23:59:59.000Z
We present the results of a Suzaku spectroscopic study of the soft extended X-ray emission in the HII region M17. The spectrum of the extended emission was obtained with a high signal-to-noise ratio in a spatially-resolved manner using the X-ray Imaging Spectrometer (XIS). We established that the contamination by unresolved point sources, the Galactic Ridge X-ray emission, the cosmic X-ray background, and the local hot bubble emission is negligible in the background-subtracted XIS spectrum of the diffuse emission. Half a dozen of emission lines were resolved clearly for the first time, including K lines of highly ionized O, Ne, and Mg as well as L series complex of Fe at 0.5--1.5 keV. Based on the diagnosis of these lines, we obtained the following results: (1) the extended emission is an optically-thin thermal plasma represented well by a single temperature of 3.0 +/- 0.4 MK, (2) the abundances of elements with emission lines in the diffuse spectrum are 0.1--0.3 solar, while those of bright discrete sources are 0.3--1.5 solar, (3) the metal abundances relative to each other in the diffuse emission are consistent with solar except for a Ne enhancement of a factor of 2, (4) both the plasma temperature and the chemical composition of the diffuse emission show no spatial variation across the studied spatial scale of about 5 pc.
The formulation of General Relativity in extended phase space as a way to its quantization
T. P. Shestakova
2009-11-30T23:59:59.000Z
Our attempts to find an explanation for quantum behavior of the Early Universe appeal, as a rule, to the Wheeler - DeWitt Quantum Geometrodynamics which relies upon Hamiltonian formulation of General Relativity proposed by Arnowitt, Deser and Misner (ADM). In spite of the fact that the basic ideas of this approach were put forward about fifty years ago, even now we do not have clear understanding what Hamiltonian formulation of General Relativity must be. An evidence for it gives a recent paper by Kiriushcheva and Kuzmin [arXiv:0809.0097], where the authors claim that the formulation by ADM and that by Dirac made in his seminal work of 1958 are not equivalent. If so, we face the question what formalism should be chosen. Another problem is that we need a well-grounded procedure of constructing a generator of transformations in phase space for all gravitational variables including gauge ones. It suggests the notion of extended phase space. After analyzing the situation, we show that Hamiltonian formulation in extended phase space is a real alternative to Dirac and ADM formulations and can be constructed to be equivalent to the original (Lagrangian) formulation of General Relativity. Quantization in extended phase space is straightforward and leads to a new description of quantum Universe in which an essential place is given to gauge degrees of freedom.
Detection of TeV Gamma-Rays from extended sources with Milagro
Parkinson, P M S; Atkins, R; Benbow, W; Berley, D; Blaufuss, E; Coyne, D G; De Young, T R; Dingus, B L; Dorfan, D E; Ellsworth, R W; Fleysher, L; Gisler, G; González, M M; Goodman, J A; Haines, T J; Hays, E; Hoffman, C M; Kelley, L A; Lansdell, C P; Linnemann, J T; McEnery, J E; Miller, R S; Mincer, A I; Morales, M F; Némethy, P; Noyes, D; Ryan, J M; Samuelson, F W; Saz-Parkinson, P M; Shoup, A; Sinnis, G; Smith, A J; Sullivan, G W; Williams, D A; Wilson, M E; Xu, X W; Yodh, G B
2005-01-01T23:59:59.000Z
The Milagro gamma-ray observatory employs a water Cherenkov detector to observe extensive air showers produced by high-energy particles impacting in the Earth's atmosphere. A 4800 m$^{2}$ pond instrumented with 723 8" PMTs detects Cherenkov light produced by secondary air-shower particles. An array of 175 4000 liter water tanks surrounding the central pond detector was recently added, extending the physical area of the Milagro observatory to 40,000 m$^{2}$ and substantially increasing the sensitivity of the detector. Because of its wide field of view and high duty cycle, Milagro is ideal for monitoring the northern sky almost continuously ($>$90% duty cycle) in the 100 GeV to 100 TeV energy range. Here we discuss the first detection of TeV gamma-rays from the inner Galactic plane region. We also report the detection of an extended TeV source coincident with the EGRET source 3EG J0520+2556, as well as the observation of extended TeV emission from the Cygnus region of the Galactic plane.
Cai, Wei
Extending the fast multipole method for charges inside a dielectric sphere in an ionic solvent 2007 Abstract As a sequel to our previous paper on extending the Fast Multipole Method (FMM; 78M25; 92B99 Keywords: Method of images; Fast multipole method; Reaction field; Ionic solvent
Bailey, W.J.
1989-03-01T23:59:59.000Z
The results of a study on extended-burnup, light-water reactor (LWR) spent fuel are described in this report. The study was performed by Pacific Northwest Laboratory for the US Department of Energy (DOE). The purpose of the study was to collect and evaluate information on the status of in-reactor performance and integrity of extended-burnup LWR fuel and initiate the investigation of the effects of extending fuel burnup on the subsequent handling, interim storage, and other operations (e.g., rod consolidation and shipping) associated with the back end of the fuel cycle. The results of this study will aid DOE and the nuclear industry in assessing the effects on waste management of extending the useful in-reactor life of nuclear fuel. The experience base with extended-burnup fuel is now substantial and projections for future use of extended-burnup fuel in domestic LWRs are positive. The basic performance and integrity of the fuel in the reactor has not been compromised by extending the burnup, and the potential limitations for further extending the burnup are not severe. 104 refs., 15 tabs.
Paulson, Lawrence C.
Extending Sledgehammer with SMT Solvers Jasmin Christian Blanchette1, , Sascha BÃ¶hme1, and Lawrence extended Sledgehammer to invoke satisfiability modulo theories (SMT) solvers as well, exploiting its relevance filter and parallel architecture. Isabelle users are now pleasantly surprised by SMT proofs
ALGEBRAIC MODELS OF SUPERSCALAR MICROPROCESSOR IMPLEMENTATIONS: A
Harman, Neal.A.
ALGEBRAIC MODELS OF SUPERSCALAR MICROPROCESSOR IMPLEMENTATIONS: A CASE STUDY A. C. J. Fox and N. A INTRODUCTION In this chapter, we extend a set of algebraic tools for microprocessors (Harman and Tucker [1996], Harman and Tucker [1997] and Fox and Harman [1996a]) to model superscalar microprocessor implementations
A numerical model of perturbation gas chromatography
DeBarro, Marc Joseph
1985-01-01T23:59:59.000Z
the polymer and the solvent. Flory (1965) extended his original model to account for the volume changes in the polymer phase. A further model was suggested by Sanchez and Lacombe (1978) based on s. lattice fluid theory. For the system examined in this work...
Agegraphic Chaplygin gas model of dark energy
Ahmad Sheykhi
2010-02-07T23:59:59.000Z
We establish a connection between the agegraphic models of dark energy and Chaplygin gas energy density in non-flat universe. We reconstruct the potential of the agegraphic scalar field as well as the dynamics of the scalar field according to the evolution of the agegraphic dark energy. We also extend our study to the interacting agegraphic generalized Chaplygin gas dark energy model.
Atmospheric Tides in the Latest Generation of Climate Models
Covey, Curt
For atmospheric tides driven by solar heating, the database of climate model output used in the most recent assessment report of the Intergovernmental Panel on Climate Change (IPCC) confirms and extends the authors’ earlier ...
A Four-Dimensional Viscoelastic Deformation Model For Long Valley...
and slip across the South Moat fault (SMF) in late 1997. We extend the spherical VE shell model of Newman et al. (Newman, A.V., Dixon, T.H., Ofoegbu, G., Dixon, J.E., 2001....
Quasi Light Fields: A Model of Coherent Image Formation
Accardi, Anthony J.
We develop a model of coherent image formation that strikes a balance between the simplicity of the light field and the comprehensive predictive power of Maxwell's equations, by extending the light field to coherent radiation.
Studies of climate variability in a simple coupled model
Abiven, Claude
2007-01-01T23:59:59.000Z
The mechanisms of variability of a coupled atmosphere-ocean model are investigated through the study of two coupled configurations: an aquaplanet in which gyres are absent, and an aquaplanet in which a ridge extending from ...
Thomson, Ty M. (Ty Matthew)
2008-01-01T23:59:59.000Z
Molecular signaling systems allow cells to sense and respond to environmental stimuli. Quantitative modeling can be a valuable tool for evaluating and extending our understanding of signaling systems. In particular, studies ...
Hankins, Donald Wayne
1988-01-01T23:59:59.000Z
-vt O O W 2000 1000 cm 0 500 1000 cm OO x vt ~ cbservaticn ttclnts Figure 11. Plan view of the concentration plume ' 1 d' and inc u ing the source e decreased sour th it tio di gram a 1 ana yses are demarcated. or 39 1 5. 0 14. 0 3-5 13... and dedication to science have been a great source of inspiration to me. DEDICATION vii TABLE OF CONTENTS ABSTRACT ACKNOWLEDGEMENTS DEDICATION TABLE OF CONTENTS LIST OF FIGURES 1. INTRODUCTION 2. MATHEMATICAL CONSIDERATIONS 2. 1 The Advection...
Greenberg, Saul
of technologies that provide real-time, energy usage feedback. However, current technologies use a "one notions for designers of technology that motivates sustainable energy behaviour. Second, I show how to illustrate the application of the framework to inform energy feedback technology design. The first
Jordan, Pamela W.
between force and ac- celeration in a different context. A hockey puck is resting on the rough ice surface of a skating rink (a hockey team has just finished practicing on it). You push with a force, F, during the time due to the ice surface (there is no air resistance). What will happen to the velocity of the puck
, stellarators, reversed-field pinches, and spheromaks. [We have attached a bibliography from our Center
Verification of Gamma Knife extend system based fractionated treatment planning using EBT2 film
Natanasabapathi, Gopishankar; Bisht, Raj Kishor [Gamma Knife Unit, Department of Neurosurgery, Neurosciences Centre, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029 (India)] [Gamma Knife Unit, Department of Neurosurgery, Neurosciences Centre, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029 (India)
2013-12-15T23:59:59.000Z
Purpose: This paper presents EBT2 film verification of fractionated treatment planning with the Gamma Knife (GK) extend system, a relocatable frame system for multiple-fraction or serial multiple-session radiosurgery.Methods: A human head shaped phantom simulated the verification process for fractionated Gamma Knife treatment. Phantom preparation for Extend Frame based treatment planning involved creating a dental impression, fitting the phantom to the frame system, and acquiring a stereotactic computed tomography (CT) scan. A CT scan (Siemens, Emotion 6) of the phantom was obtained with following parameters: Tube voltage—110 kV, tube current—280 mA, pixel size—0.5 × 0.5 and 1 mm slice thickness. A treatment plan with two 8 mm collimator shots and three sectors blocking in each shot was made. Dose prescription of 4 Gy at 100% was delivered for the first fraction out of the two fractions planned. Gafchromic EBT2 film (ISP Wayne, NJ) was used as 2D verification dosimeter in this process. Films were cut and placed inside the film insert of the phantom for treatment dose delivery. Meanwhile a set of films from the same batch were exposed from 0 to 12 Gy doses for calibration purposes. An EPSON (Expression 10000 XL) scanner was used for scanning the exposed films in transparency mode. Scanned films were analyzed with inhouse written MATLAB codes.Results: Gamma index analysis of film measurement in comparison with TPS calculated dose resulted in high pass rates >90% for tolerance criteria of 1%/1 mm. The isodose overlay and linear dose profiles of film measured and computed dose distribution on sagittal and coronal plane were in close agreement.Conclusions: Through this study, the authors propose treatment verification QA method for Extend frame based fractionated Gamma Knife radiosurgery using EBT2 film.
Operational Challenges of Extended Dry Storage of Spent Nuclear Fuel - 12550
Nichol, M. [Nuclear Energy Institute, Washington DC (United States)
2012-07-01T23:59:59.000Z
As a result of the termination of the Yucca Mountain used fuel repository program and a continuing climate of uncertainty in the national policy for nuclear fuel disposition, the likelihood has increased that extended storage, defined as more than 60 years, and subsequent transportation of used nuclear fuel after periods of extended storage may become necessary. Whether at the nation's 104 nuclear energy facilities, or at one or more consolidated interim storage facilities, the operational challenges of extended storage and transportation will depend upon the future US policy for Used Fuel Management and the future Regulatory Framework for EST, both of which should be developed with consideration of their operational impacts. Risk insights into the regulatory framework may conclude that dry storage and transportation operations should focus primarily on ensuring canister integrity. Assurance of cladding integrity may not be beneficial from an overall risk perspective. If assurance of canister integrity becomes more important, then mitigation techniques for potential canister degradation mechanisms will be the primary source of operational focus. If cladding integrity remains as an important focus, then operational challenges to assure it would require much more effort. Fundamental shifts in the approach to design a repository and optimize the back-end of the fuel cycle will need to occur in order to address the realities of the changes that have taken place over the last 30 years. Direct disposal of existing dual purpose storage and transportation casks will be essential to optimizing the back end of the fuel cycle. The federal used fuel management should focus on siting and designing a repository that meets this objective along with the development of CIS, and possibly recycling. An integrated approach to developing US policy and the regulatory framework must consider the potential operational challenges that they would create. Therefore, it should be integral to these efforts to redefine retrievability to apply to the dual purpose cask, and not to apply to individual assemblies. (authors)
Scalar and Electromagnetic Quasinormal modes of Extended black hole in F(R) gravity
Saneesh Sebastian; V. C. Kuriakose
2014-08-05T23:59:59.000Z
In this paper we study the scalar and electromagnetic perturbations of an extended black hole in F(R) gravity. The quasinormal modes in two cases are evaluated and studied their behavior by plotting graphs in each case. To study the quasinormal mode, we use the third order WKB method. The present study shows that the absolute value of imaginary part of complex quasinormal modes increases in both cases, thus the black hole is stable against these perturbations. As the mass of the scalar field increases the imaginary part of the frequency decreases. Thus damping slows down with increasing mass of the scalar field.
Extending the Correlation of $L_R - L_X$ to Gamma Ray Bursts
Lv, Jing; Zou, Yuan-Chuan; Lei, Wei-Hua; Wu, Qingwen; Wang, Ding-Xiong
2015-01-01T23:59:59.000Z
The well-known correlation between the radio luminosity ($L_R$) and the X-ray luminosity ($L_X$) $L_R / L_X \\simeq 10^{-5}$ holds for a variety of objects like active galactic nuclei, galactic black holes, solar flares and cool stars. Here we extend the relation to gamma-ray bursts (GRBs), and find the GRBs also lay on the same $L_R-L_X$ relation, with a slightly different slope as $L_R \\propto L_X^{1.1}$. This relation implies the explosions in different scales may have a common underlying origin.
BD Hanson; J Abrefah; SC Marschman; SG Prussin
2000-09-08T23:59:59.000Z
The main objective of this project is to develop an advanced fuel matrix capable of achieving extended burnup while improving safety margins and reliability for present operations. In the course of this project, the authors improve understanding of the mechanism for high burnup structure (HBS) formation and attempt to design a fuel to minimize its formation. The use of soluble dopants in the UO{sub 2} matrix to stabilize the matrix and minimize fuel-side corrosion of the cladding is the main focus.
Conditions for experimental Boson-sampling computer to disprove the Extended Church-Turing thesis
Shchesnovich, V S
2014-01-01T23:59:59.000Z
We consider the experimentally verifiable Extended Church-Turing thesis and derive sufficient conditions for an imperfect experimental realization of the Boson-sampling computer of Aaronson & Arkhipov to disprove it. Since the effect of the photon mode mismatch and the network imperfections (noise) are already known, we focus on the multi-photon and vacuum components of the input, the photons losses, and the detector dark counts. The main result is the complete set of sufficient conditions on the experimental imperfections for scalability of the experimental BS computer.
Globular clusters with the extended horizontal-branch as remaining cores of galaxy building blocks
Young-Wook Lee; Hansung B. Gim; Chul Chung
2007-07-11T23:59:59.000Z
The relics of building blocks that made stellar halo and bulge are yet to be discovered unless they were completely disrupted throughout the history of the Galaxy. Here we suggest that about 25% of the Milky Way globular clusters have characteristics of the remaining cores of these early building blocks rather than genuine star clusters. They are clearly distinct from other normal globular clusters in the presence of extended horizontal-branch and multiple stellar populations, in mass (brightness), and most importantly in orbital kinematics. Based on this result, a three-stage formation picture of the Milky Way is suggested, which includes early mergers, collapse, and later accretion.
Networks of the Future: Extending our senses into the physical world
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 Science (SC)Integrated CodesTransparency VisitSilverNepheline crystallizationTrainingExtending
SunLine Begins Extended Testing of Hybrid Fuel Cell Bus | Department of
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideoStrategic Safety GoalsEnergy Begins Extended Testing of Hybrid Fuel Cell
Extended Prigozhin theorem: method for universal characterization of complex system evolution
Sergey Kamenshchikov
2014-07-27T23:59:59.000Z
Evolution of arbitrary stochastic system was considered in frame of phase transition description. Concept of Reynolds parameter of hydrodynamic motion was extended to arbitrary complex system. Basic phase parameter was expressed through power of energy, injected into system and power of energy, dissipated through internal nonlinear mechanisms. It was found out that basic phase parameter as control parameter must be delimited for two types of system - accelerator and decelerator. It was suggested to select zero state entropy on through condition of zero value for entropy production. Zero state introduces universal principle of disorder characterization. On basis of self organization theorem we have derived relations for entropy production behavior in the vicinity stationary state of system. Advantage of these relations in comparison to classical Prigozhin theorem is versatility of their application to arbitrary nonlinear systems. It was found out that extended Prigozhin theorem introduces two relations for accelerator and decelerator correspondingly, which remarks their quantitative difference. At the same time classic Prigozhin theorem makes possible description of linear decelerator only. For unstable motion it corresponds to strange attractor.
Baryon states with hidden charm in the extended local hidden gauge approach
Uchino, T; Oset, E
2015-01-01T23:59:59.000Z
The s-wave interaction of $\\bar{D} \\Lambda_c, \\bar{D} \\Sigma_c, \\bar{D} \\Lambda_c, \\bar{D}{}^* \\Sigma_c$ and $\\bar{D}\\Sigma^*_c, \\bar{D}{}^*\\Sigma^*_c$, is studied within a unitary coupled channels scheme with the extended local hidden gauge approach. In addition to the Weinberg-Tomozawa term, several additional diagrams via the pion-exchange are also taken into account as box potentials. Furthermore, in order to implement the full coupled channels calculation, some of the box potentials which mix the vector-baryon and pseudoscalar-baryon sectors are extended to construct the effective transition potentials. As a result, we have observed six possible states in several angular momenta. Four of them correspond to two pairs of admixture states, two of $\\bar{D}\\Sigma_c$ - $\\bar{D}{}^*\\Sigma_c$ with $J^P = 1/2^-$, and two of $\\bar{D}\\Sigma^*_c$ - $\\bar{D}{}^*\\Sigma^*_c$ with $J^P = 3/2^-$. Moreover, we find a $\\bar{D}{}^* \\Sigma_c$ resonance which couples to the $\\bar{D}\\Lambda_c$ channel and one spin degenerated ...
Spatially extended K I 7699 emission in the nebula of VY CMa: Kinematics and geometry
Nathan Smith
2004-02-13T23:59:59.000Z
Long-slit echelle spectra reveal bright extended emission from the K I lambda7699 resonance line in the reflection nebula surrounding the extreme red supergiant VY Canis Majoris. The central star has long been known for its unusually-bright K I emission lines, but this is the first report of intrinsic emission from K I in the nebula. The extended emission is not just a reflected spectrum of the star, but is due to resonant scattering by K atoms in the outer nebula itself, and is therefore a valuable probe of the kinematics and geometry of VY CMa's circumstellar environment. Dramatic velocity structure is seen in the long-slit spectra, and most lines of sight intersect multiple distinct velocity components. A faint ``halo'' at large distances from the star does appear to show a reflected spectrum, however, and suggests a systemic velocity of +40 km/s with respect to the Sun. The most striking feature is blueshifted emission from the filled interior of a large shell seen in images; the kinematic structure is reminiscent of a Hubble flow, and provides strong evidence for asymmetric and episodic mass loss due to localized eruptions on the star's surface.
Arima, Takashi, E-mail: tks@stat.nitech.ac.jp [Center for Social Contribution and Collaboration, Nagoya Institute of Technology (Japan); Mentrelli, Andrea, E-mail: andrea.mentrelli@unibo.it [Department of Mathematics and Research Center of Applied Mathematics (CIRAM), University of Bologna (Italy); Ruggeri, Tommaso, E-mail: tommaso.ruggeri@unibo.it [Department of Mathematics and Research Center of Applied Mathematics (CIRAM), University of Bologna (Italy)
2014-06-15T23:59:59.000Z
Molecular extended thermodynamics of rarefied polyatomic gases is characterized by two hierarchies of equations for moments of a suitable distribution function in which the internal degrees of freedom of a molecule is taken into account. On the basis of physical relevance the truncation orders of the two hierarchies are proven to be not independent on each other, and the closure procedures based on the maximum entropy principle (MEP) and on the entropy principle (EP) are proven to be equivalent. The characteristic velocities of the emerging hyperbolic system of differential equations are compared to those obtained for monatomic gases and the lower bound estimate for the maximum equilibrium characteristic velocity established for monatomic gases (characterized by only one hierarchy for moments with truncation order of moments N) by Boillat and Ruggeri (1997) (?{sub (N)}{sup E,max})/(c{sub 0}) ??(6/5 (N?1/2 )),(c{sub 0}=?(5/3 k/m T)) is proven to hold also for rarefied polyatomic gases independently from the degrees of freedom of a molecule. -- Highlights: •Molecular extended thermodynamics of rarefied polyatomic gases is studied. •The relation between two hierarchies of equations for moments is derived. •The equivalence of maximum entropy principle and entropy principle is proven. •The characteristic velocities are compared to those of monatomic gases. •The lower bound of the maximum characteristic velocity is estimated.
Kalay, Berfin; Demiralp, Metin [?stanbul Technical University, Informatics Institute, Maslak, 34469, ?stanbul (Turkey)
2014-10-06T23:59:59.000Z
The expectation value definitions over an extended space from the considered Hilbert space of the system under consideration is given in another paper of the second author in this symposium. There, in that paper, the conceptuality rather than specification is emphasized on. This work uses that conceptuality to investigate the time evolutions of the position related operators' expectation values not in its standard meaning but rather in a new version of the definition over not the original Hilbert space but in the space obtained by extensions via introducing the images of the given initial wave packet under the positive integer powers of the system Hamiltonian. These images may not be residing in the same space of the initial wave packet when certain singularities appear in the structure of the system Hamiltonian. This may break down the existence of the integrals in the definitions of the expectation values. The cure is the use of basis functions in the abovementioned extended space and the sandwiching of the target operator whose expectation value is under questioning by an appropriately chosen operator guaranteeing the existence of the relevant integrals. Work specifically focuses on the hydrogen-like quantum systems whose Hamiltonians contain a polar singularity at the origin.
Diederik Aerts; Massimiliano Sassoli de Bianchi
2015-04-19T23:59:59.000Z
The extended Bloch representation of quantum mechanics was recently derived to offer a (hidden-measurement) solution to the measurement problem. In this article we use it to investigate the geometry of superposition and entangled states, explaining the interference effects, and the entanglement correlations, in terms of the different orientations that a state-vector can take within the generalized Bloch sphere. We also introduce a tensorial determination of the generators of SU(N), particularly suitable to describe multipartite systems, from the viewpoint of the sub-entities. We then use it to show that non-product states admit a general description in which the sub-entities can always remain in well-defined states, even when they are entangled. Therefore, the completed version of quantum mechanics provided by the extended Bloch representation, in which the density operators are also representative of pure states, allows to solve not only the well-known measurement problem, but also the lesser-known entanglement problem. This because we no longer need to give up the general physical principle saying that a composite entity exists, and therefore is in a pure state, if and only if its components also exist, and therefore are in well-defined pure states.
The All-Wavelength Extended Groth Strip International Survey(AEGIS) Data Sets
Davis, M.; Guhathakurta, P.; Konidaris, N.P.; Newman, J.A.; Ashby, M.L.N.; Biggs, A.D.; Barmby, P.; Bundy, K.; Chapman, S.C.; Coil,A.L.; Conselice, C.J.; Cooper, M.C.; Croton, D.J.; Eisenhardt, P.R.M.; Ellis, R.S.; Faber, S.M.; Fang, T.; Fazio, G.G.; Georgakakis, A.; Gerke,B.F.; Goss, W.M.; Gwyn, S.; Harker, J.; Hopkins, A.M.; Huang, J.-S.; Ivison, R.J.; Kassin, S.A.; Kirby, E.N.; Koekemoer, A.M.; Koo, D.C.; Laird, E.S.; Le Floc'h, E.; Lin, L.; Lotz, J.M.; Marshall, P.J.; Martin,D.C.; Metevier, A.J.; Moustakas, L.A.; Nandra, K.; Noeske, K.G.; Papovich, C.; Phillips, A.C.; Rich,R. M.; Rieke, G.H.; Rigopoulou, D.; Salim, S.; Schiminovich, D.; Simard, L.; Smail, I.; Small,T.A.; Weiner,B.J.; Willmer, C.N.A.; Willner, S.P.; Wilson, G.; Wright, E.L.; Yan, R.
2006-10-13T23:59:59.000Z
In this the first of a series of Letters, we present a description of the panchromatic data sets that have been acquired in the Extended Groth Strip region of the sky. Our survey, the All-wavelength Extended Groth Strip International Survey (AEGIS), is intended to study the physical properties and evolutionary processes of galaxies at z{approx}1. It includes the following deep, wide-field imaging data sets: Chandra/ACIS X-ray (0.5-10 keV), GALEX ultraviolet (1200-2500 Angstroms), CFHT/MegaCam Legacy Survey optical (3600-9000 Angstroms), CFHT/CFH12K optical (4500-9000 Angstroms), Hubble Space Telescope/ACS optical (4400-8500 Angstroms), Palomar/WIRC near-infrared (1.2-2.2 {micro}m), Spitzer/IRAC mid-infrared (3.6-8.0 {micro}m), Spitzer/MIPS far-infrared (24-70 {micro}m), and VLA radio continuum (6-20 cm). In addition, this region of the sky has been targeted for extensive spectroscopy using the DEIMOS spectrograph on the Keck II 10 m telescope. Our survey is compared to other large multiwavelength surveys in terms of depth and sky coverage.
The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
Davis, M.; Guhathakurta, P.; Konidaris, N.; Newman, J.A.; Ashby, M.L.N.; Biggs, A.D.; Barmby, P.; Bundy, K.; Chapman, S.; Coil, A.L.; Conselice, C.; Cooper, M.; Croton,; Eisenhardt, P.; Ellis, R.; Faber, S.; Fang, T.; Fazio, G.G.; Georgakakis, A.; Gerke, B.; Goss, W.M.; /UC, Berkeley, Astron. Dept. /Lick Observ. /LBL, Berkeley
2006-07-21T23:59:59.000Z
In this the first of a series of ''Letters'', we present a description of the panchromatic data sets that have been acquired in the Extended Groth Strip region of the sky. Our survey, the All-wavelength Extended Groth Strip International Survey (AEGIS), is intended to study the physical properties and evolutionary processes of galaxies at z {approx} 1. It includes the following deep, wide-field imaging data sets: Chandra/ACIS{sup 30} X-ray (0.5-10 keV), GALEX{sup 31} ultraviolet (1200-2500 A), CFHT/MegaCam Legacy Survey{sup 32} optical (3600-9000 {angstrom}), CFHT/CFH12K optical (4500-9000 {angstrom}), Hubble Space Telescope/ACS{sup 33} optical (4400-8500 {angstrom}), Palomar/WIRC{sup 34} near-infrared (1.2-2.2 {micro}m), Spitzer/IRAC{sup 35} mid-infrared (3.6-8.0 {micro}m), Spitzer/MIPS far-infrared (24-70 {micro}m), and VLA{sup 36} radio continuum (6-20 cm). In addition, this region of the sky has been targeted for extensive spectroscopy using the DEIMOS spectrograph on the Keck II 10 m telescope{sup 37}. Our survey is compared to other large multiwavelength surveys in terms of depth and sky coverage.
Extending Noise Robust Structured Support Vector Machines to Larger Vocabulary Tasks
Gales, Mark
, e.g., Structured Conditional Random Fields (SCRF) [1], and structured Log Linear Model (LLM) [2], [3
A generalized self consistent model for effective elastic moduli of human dentine
Qin, Qinghua
Consistent Model for cell model of fiber-reinforced composites is extended to the case of hollow cylinder model and the corresponding cell model is chosen to consist of a circular hollow cylinder filled from other models such as nano-indentation method. Ã? 2006 Elsevier Ltd. All rights reserved. Keywords
Yang, Zong-Liang
-lapse seismic modeling: accuracy required to detect signals from a waterflooded reservoir, Journal of Seismic., Stoffa, P. L., Tatham, R. H., Petro-electric modeling for CSEM reservoir characterization and monitoring reservoir modeling, Geophysics 76 No. 6 O45-O58 2011S Shahin, A., Stoffa, P. L., Tatham, R. H., Sava, D
Tolia, V.; Calhoun, J.A.; Kuhns, L.R.; Kauffman, R.E. (Wayne State Univ., Detroit, MI (USA))
1990-05-01T23:59:59.000Z
Sixty-nine infants younger than 1 year of age, with symptoms of persistent vomiting, recurrent choking, apnea, persistent cough, or stridor, were evaluated for gastroesophageal reflux. All infants underwent extended intraesophageal pH monitoring for 16 to 24 hours as well as gastroesophageal scintigraphy with technetium 99m sulfur colloid to study the correlation between the two tests. Forty-eight infants exhibited reflux with extended pH monitoring whereas 46 infants showed reflux with scintigraphy. However, the diagnosis of reflux in individual patients by extended pH monitoring corresponded poorly with the diagnosis of reflux in the same patients by scintigraphy. Similarly, no correlation was observed between extended pH monitoring and scintigraphy results, whether expressed as percent gastric emptying or as gastroesophageal reflux ratio. We conclude that extended pH monitoring and scintigraphy measure different pathophysiologic phenomena and detect reflux under different conditions. The ability of these tests to detect reflux may be complementary and they may be of greatest value when used together to enhance the sensitivity and specificity of the diagnostic evaluation. Extended pH monitoring and scintigraphy should not be used interchangeably to monitor gastroesophageal reflux.
STAR FORMATION IN THE EXTENDED GASEOUS DISK OF THE ISOLATED GALAXY CIG 96
Espada, D.; Sabater, J.; Verdes-Montenegro, L.; Sulentic, J. [Instituto de Astrofisica de AndalucIa, CSIC, Apdo. 3004, 18080 Granada (Spain); Munoz-Mateos, J. C.; Gil de Paz, A. [Departamento de Astrofisica y CC. de la Atmosfera, Universidad Complutense de Madrid, Avda. de la Complutense, s/n, E-28040 Madrid (Spain); Boissier, S.; Athanassoula, E.; Bosma, A. [Laboratoire d'Astrophysique de Marseille, OAMP, Universite Aix-Marseille and CNRS UMR 6110, 38 rue Frederic Joliot-Curie, 13388 Marseille Cedex 13 (France); Verley, S. [Dept. de Fisica Teorica y del Cosmos, Universidad de Granada, Granada (Spain); Leon, S. [Joint ALMA Observatory/ESO, Av. Alonso de Cordova 3107, Vitacura, Santiago (Chile); Yun, M., E-mail: daniel.espada@nao.ac.jp, E-mail: despada@cfa.harvard.edu [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)
2011-07-20T23:59:59.000Z
We study the Kennicutt-Schmidt star formation law and efficiency in the gaseous disk of the isolated galaxy CIG 96 (NGC 864), with special emphasis on its unusually large atomic gas (H I) disk (r{sub Hmathsci}/r{sub 25} = 3.5, r{sub 25} = 1.'85). We present deep Galaxy Evolution Explorer near- and far-UV observations, used as a recent star formation tracer, and we compare them with new, high-resolution (16''or 1.6 kpc) Very Large Array H I observations. The UV and H I maps show good spatial correlation outside the inner 1', where the H I phase dominates over H{sub 2}. Star-forming regions in the extended gaseous disk are mainly located along the enhanced H I emission within two (relatively) symmetric, giant gaseous spiral arm-like features, which emulate an H I pseudo-ring at r {approx_equal} 3'. Inside this structure, two smaller gaseous spiral arms extend from the northeast and southwest of the optical disk and connect to the previously mentioned H I pseudo-ring. Interestingly, we find that the (atomic) Kennicutt-Schmidt power-law index systematically decreases with radius, from N {approx_equal} 3.0 {+-} 0.3 in the inner disk (0.'8-1.'7) to N = 1.6 {+-} 0.5 in the outskirts of the gaseous disk (3.'3-4.'2). Although the star formation efficiency (SFE), the star formation rate per unit of gas, decreases with radius where the H I component dominates as is common in galaxies, we find that there is a break of the correlation at r = 1.5r{sub 25}. At radii 1.5r{sub 25} < r < 3.5r{sub 25}, mostly within the H I pseudo-ring structure, regions exist whose SFE remains nearly constant, SFE {approx_equal} 10{sup -11} yr{sup -1}. We discuss possible mechanisms that might be triggering the star formation in the outskirts of this galaxy, and we suggest that the constant SFE for such large radii (r > 2r{sub 25}) and at such low surface densities might be a common characteristic in extended UV disk galaxies.
Modeling the Dynamics of Compromised Networks
Soper, B; Merl, D M
2011-09-12T23:59:59.000Z
Accurate predictive models of compromised networks would contribute greatly to improving the effectiveness and efficiency of the detection and control of network attacks. Compartmental epidemiological models have been applied to modeling attack vectors such as viruses and worms. We extend the application of these models to capture a wider class of dynamics applicable to cyber security. By making basic assumptions regarding network topology we use multi-group epidemiological models and reaction rate kinetics to model the stochastic evolution of a compromised network. The Gillespie Algorithm is used to run simulations under a worst case scenario in which the intruder follows the basic connection rates of network traffic as a method of obfuscation.
Options Extending the Applicability of High-Temperature Irradiation-Resistant Thermocouples
Joy L. Rempe; Darrell L. Knudson; Keith G. Condie; John C. Crepeau; Joshua E. Daw
2009-07-01T23:59:59.000Z
Several options have been identified that could further enhance the reliability and extend the applicability of High Temperature Irradiation Resistant ThermoCouples (HTIR-TCs) developed by the Idaho National Laboratory (INL) for in-pile testing, allowing their use in temperature applications as high as 1800 °C. The INL and the University of Idaho (UI) investigated these options with the ultimate objective of providing recommendations for alternate thermocouple designs that are optimized for various applications. This paper reports results from INL/UI investigations. Results are reported from tests completed to evaluate the ductility, resolution, transient response, and stability of thermocouples made from specially formulated alloys of molybdenum and niobium. In addition, this paper reports insights gained by comparing the performance of thermocouples fabricated with various heat treatments and alternate geometries.
Optical signatures of quantum delocalization over extended domains in photosynthetic membranes
Schroeder, Christopher A; Huelga, Susana F; Plenio, Martin B
2015-01-01T23:59:59.000Z
The prospect of coherent dynamics and excitonic delocalization across several light-harvesting structures in photosynthetic membranes is of considerable interest, but challenging to explore experimentally. Here we demonstrate theoretically that the excitonic delocalization across extended domains involving several light-harvesting complexes can lead to unambiguous signatures in the optical response, specifically, linear absorption spectra. We characterize, under experimentally established conditions of molecular assembly and protein-induced inhomogeneities, the optical absorption in these arrays from polarized and unpolarized excitation, and demonstrate that it can be used as a diagnostic tool to determine the coherent coupling among iso-energetic light-harvesting structures. The knowledge of these couplings would then provide further insight into the dynamical properties of transfer, such as facilitating the accurate determination of F\\"orster rates.
Spatially extended void-free dusty plasmas in a laboratory radio-frequency discharge
Schmidt, C.; Arp, O.; Piel, A. [IEAP, Christian-Albrechts-Universitaet Kiel, D-24098 Kiel (Germany)
2011-01-15T23:59:59.000Z
Laboratory experiments with thermophoretic levitation of dust are described that aim at the closure of a central dust-free void region. A careful study of the void structure as a function of the discharge and levitation parameters leads to the discovery of an extended parameter region where stable void-free equilibria are found. The void closure is effected by a novel mechanism that involves a self-organized change in the discharge topology, in which the dust cloud becomes surrounded by a toroidal region of plasma production. In this geometry ions are found to stream radially inwards instead of outwards as in clouds with a central void. This change in ion flow is proved by a reversal of the propagation direction of dust-density waves.
Temporal structure of aggregate power fluctuations in large-eddy simulations of extended wind-farms
Stevens, Richard J A M
2014-01-01T23:59:59.000Z
Fluctuations represent a major challenge for the incorporation of electric power from large wind-farms into power grids. Wind farm power output fluctuates strongly in time, over various time scales. Understanding these fluctuations, especially their spatio-temporal characteristics, is particularly important for the design of backup power systems that must be readily available in conjunction with wind-farms. In this work we analyze the power fluctuations associated with the wind-input variability at scales between minutes to several hours, using large eddy simulations (LES) of extended wind-parks, interacting with the atmospheric boundary layer. LES studies enable careful control of parameters and availability of wind-velocities simultaneously across the entire wind-farm. The present study focuses on neutral atmospheric conditions and flat terrain, using actuator-disk representations of the individual wind-turbines. We consider power from various aggregates of wind-turbines such as the total average power sign...
Traffic Incident Analysis on Urban Arterials Using Extended Spectral Envelope Method
Yang, Zhen-zhen; Gao, Zi-you; Sun, Ya-fu; Guo, Sheng-min
2015-01-01T23:59:59.000Z
A traffic incident analysis method based on extended spectral envelope (ESE) method is presented to detect the key incident time. Sensitivity analysis of parameters (the length of time window, the length of sliding window and the study period) are discussed on four real traffic incidents in Beijing. The results show that: (1) Moderate length of time window got the best accurate in detection. (2) The shorter the sliding window is, the more accurate the key incident time are detected. (3) If the study period is too short, the end time of an incident cannot be detected. Empirical studies show that the proposed method can effectively discover the key incident time, which can provide a theoretic basis for traffic incident management.
Removal of CaCO[sub 3] extender in residential coatings by atmospheric acidic deposition
Miller, W.C.; Fornes, R.E.; Gilbert, R.D.; Speer, A.; Spence, J.
1992-01-01T23:59:59.000Z
The removal and fate of CaCO[sub 3] extender in latex and alkyd paints upon exposure of paint films to UV and atmospheric pollutants generated in a large environmental chamber were studied using optical and scanning electron microscopy in combination with energy dispersive spectroscopy. X-ray mapping of film cross sections was used to examine migration of calcium to the film surface, and x-ray diffraction and Energy Dispersive Spectroscopy (EDS) were employed to determine crystalline nature of surface deposits. Crystals of various forms of calcium sulfate formed on paint surfaces. Surprisingly, migration of calcium to the paint surface occurred in the absence of liquid water in the form of dew.
X-ray imaging crystal spectrometer for extended X-ray sources
Bitter, Manfred L. (Princeton, NJ); Fraenkel, Ben (Jerusalem, IL); Gorman, James L. (Bordentown, NJ); Hill, Kenneth W. (Lawrenceville, NJ); Roquemore, A. Lane (Cranbury, NJ); Stodiek, Wolfgang (Princeton, NJ); von Goeler, Schweickhard E. (Princeton, NJ)
2001-01-01T23:59:59.000Z
Spherically or toroidally curved, double focusing crystals are used in a spectrometer for X-ray diagnostics of an extended X-ray source such as a hot plasma produced in a tokomak fusion experiment to provide spatially and temporally resolved data on plasma parameters using the imaging properties for Bragg angles near 45. For a Bragg angle of 45.degree., the spherical crystal focuses a bundle of near parallel X-rays (the cross section of which is determined by the cross section of the crystal) from the plasma to a point on a detector, with parallel rays inclined to the main plain of diffraction focused to different points on the detector. Thus, it is possible to radially image the plasma X-ray emission in different wavelengths simultaneously with a single crystal.
Kim, Jeong San; Sanders, Barry C
2008-01-01T23:59:59.000Z
We propose replacing concurrence by convex-roof extended negativity (CREN) for studying monogamy of entanglement (MoE). We show that all proven MoE relations using concurrence can be rephrased in terms of CREN. Furthermore we show that higher-dimensional (qudit) extensions of MoE in terms of CREN are not disproven by any of the counterexamples used to disprove qudit extensions of MoE in terms of concurrence. We further test the CREN version of MoE for qudits by considering fully or partially coherent mixtures of a qudit W-class state with the vacuum and show that the CREN version of MoE for qudits is satisfied in this case as well. The CREN version of MoE for qudits is thus a strong conjecture with no obvious counterexamples.
The prospects for extended phase space approach to quantization of gravity
T. P. Shestakova
2004-12-17T23:59:59.000Z
A brief review of main features of the new approach named ``quantum geometrodynamics in extended phase space'' is given and its possible prospects are discussed. Gauge degrees of freedom are treated as a subsystem of the Universe which affects the evolution of the physical subsystem. Three points can be singled out when the gauge subsystem shows itself as a real constituent of the Universe: a chosen gauge condition determines the form of equation for the physical part of wave function, the form of density matrix and the measure in physical subspace. An example is considered when a physically relevant choice of gauge condition leads to almost diagonal density matrix. The analogy between a transition to another reference frame (another basis in physical subspace) and a transition to accelerating reference frame in Rindler space is suggested.
Grounds for Quantum Geometrodynamics in an extended phase space and its cosmological consequences
T. P. Shestakova
2000-06-29T23:59:59.000Z
Quantum geometrodynamics (QGD) in extended phase space essentially distinguished from the Wheeler - DeWitt QGD is proposed. The grounds for constructing a new version of quantum geometrodynamics are briefly discussed. The main part in the proposed version of QGD is given to the Schrodinger equation for a wave function of the Universe. The Schrodinger equation carries information about a chosen gauge condition which fixes a reference system. The reference system is represented by a continual medium that can be called ``the gravitational vacuum condencate". A solution to the Schrodinger equation contains information about the integrated system ``a physical object + observation means (the gravitational vacuum condensate)". It may be demonstrated that the gravitational vacuum condensate appears to be a cosmological evolution factor.
Extended Møller-Plesset perturbation theory for dynamical and static correlations
Tsuchimochi, Takashi, E-mail: tsuchimochi@mit.edu; Van Voorhis, Troy [Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139 (United States)
2014-10-28T23:59:59.000Z
We present a novel method that appropriately handles both dynamical and static electron correlations in a balanced manner, using a perturbation theory on a spin-extended Hartree-Fock (EHF) wave function reference. While EHF is a suitable candidate for degenerate systems where static correlation is ubiquitous, it is known that most of dynamical correlation is neglected in EHF. In this work, we derive a perturbative correction to a fully spin-projected self-consistent wave function based on second-order Møller-Plesset perturbation theory (MP2). The proposed method efficiently captures the ability of EHF to describe static correlation in degeneracy, combined with MP2's ability to treat dynamical correlation effects. We demonstrate drastic improvements on molecular ground state and excited state potential energy curves and singlet-triplet splitting energies over both EHF and MP2 with similar computational effort to the latter.
Conjugate adaptive optics in widefield microscopy with an extended-source wavefront sensor
Li, Jiang; Paudel, Hari; Barankov, Roman; Bifano, Thomas; Mertz, Jerome
2015-01-01T23:59:59.000Z
Adaptive optics is a strategy to compensate for sample-induced aberrations in microscopy applications. Generally, it requires the presence of "guide stars" in the sample to serve as localized reference targets. We describe an implementation of conjugate adaptive optics that is amenable to widefield (i.e. non-scanning) microscopy, and can provide aberration corrections over potentially large fields of view without the use of guide stars. A unique feature of our implementation is that it is based on wavefront sensing with a single-shot partitioned-aperture sensor that provides large dynamic range compatible with extended samples. Combined information provided by this sensor and the imaging camera enable robust image de-blurring based on a rapid estimation of sample and aberrations obtained by closed-loop feedback. We present the theoretical principle of our technique and proof of concept experimental demonstrations.
Animalu, A.O.E.
1987-11-01T23:59:59.000Z
A new approach to the ''extended relativity'' principle proposed by Recami, Mignani, and others, in which the speed of light (c) is invariant with respect to both subluminal (v
NONE
1998-08-01T23:59:59.000Z
The theme of this workshop is Supporting the Transition to World Class Manufacturing. This workshop provides a forum for an informal exchange of information between researchers in the photovoltaic and non-photovoltaic fields on various aspects of impurities and defects in silicon, their dynamics during device processing, and their application in defect engineering. This interaction helps establish a knowledge base that can be used for improving device fabrication processes to enhance solar-cell performance and reduce cell costs. It also provides an excellent opportunity for researchers from industry and universities to recognize mutual needs for future joint research. The workshop format features invited review presentations, panel discussions, and two poster sessions. The poster sessions create an opportunity for both university and industrial researchers to present their latest results and provide a natural forum for extended discussions and technical exchanges.
Method using CO for extending the useful shelf-life of refrigerated red blood cells
Bitensky, M.W.
1995-12-19T23:59:59.000Z
A method is disclosed using CO for extending the useful shelf-life of refrigerated red blood cells. Carbon monoxide is utilized for stabilizing hemoglobin in red blood cells to be stored at low temperature. Changes observed in the stored cells are similar to those found in normal red cell aging in the body, the extent thereof being directly related to the duration of refrigerated storage. Changes in cell buoyant density, vesiculation, and the tendency of stored cells to bind autologous IgG antibody directed against polymerized band 3 IgG, all of which are related to red blood cell senescence and increase with refrigerated storage time, have been substantially slowed when red blood cells are treated with CO. Removal of the carbon monoxide from the red blood cells is readily and efficiently accomplished by photolysis in the presence of oxygen so that the stored red blood cells may be safely transfused into a recipient. 5 figs.
Method using CO for extending the useful shelf-life of refrigerated red blood cells
Bitensky, Mark W. (Los Alamos, NM)
1995-01-01T23:59:59.000Z
Method using CO for extending the useful shelf-life of refrigerated red blood cells. Carbon monoxide is utilized for stabilizing hemoglobin in red blood cells to be stored at low temperature. Changes observed in the stored cells are similar to those found in normal red cell aging in the body, the extent thereof being directly related to the duration of refrigerated storage. Changes in cell buoyant density, vesiculation, and the tendency of stored cells to bind autologous IgG antibody directed against polymerized band 3 IgG, all of which are related to red blood cell senescence and increase with refrigerated storage time, have been substantially slowed when red blood cells are treated with CO. Removal of the carbon monoxide from the red blood cells is readily and efficiently accomplished by photolysis in the presence of oxygen so that the stored red blood cells may be safely transfused into a recipient.
Seaberg, Matthew D; Gardner, Dennis F; Shanblatt, Elisabeth R; Murnane, Margaret M; Kapteyn, Henry C; Adams, Daniel E
2013-01-01T23:59:59.000Z
We demonstrate high resolution extreme ultraviolet (EUV) coherent diffractive imaging in the most general reflection geometry by combining ptychography with tilted plane correction. This method makes it possible to image extended surfaces at any angle of incidence. Refocused light from a tabletop coherent high harmonic light source at 29 nm illuminates a nanopatterned surface at 45 degree angle of incidence. The reconstructed image contains quantitative amplitude and phase (in this case pattern height) information, comparing favorably with both scanning electron microscope and atomic force microscopy images. In the future, this approach will enable imaging of complex surfaces and nanostructures with sub-10 nm-spatial resolution and fs-temporal resolution, which will impact a broad range of nanoscience and nanotechnology including for direct application in actinic inspection in support of EUV lithography.
Jeong San Kim; Anirban Das; Barry C. Sanders
2008-11-13T23:59:59.000Z
We propose replacing concurrence by convex-roof extended negativity (CREN) for studying monogamy of entanglement (MoE). We show that all proven MoE relations using concurrence can be rephrased in terms of CREN. Furthermore we show that higher-dimensional (qudit) extensions of MoE in terms of CREN are not disproven by any of the counterexamples used to disprove qudit extensions of MoE in terms of concurrence. We further test the CREN version of MoE for qudits by considering fully or partially coherent mixtures of a qudit W-class state with the vacuum and show that the CREN version of MoE for qudits is satisfied in this case as well. The CREN version of MoE for qudits is thus a strong conjecture with no obvious counterexamples.
A 95 GHz CLASS I METHANOL MASER SURVEY TOWARD GLIMPSE EXTENDED GREEN OBJECTS (EGOs)
Chen Xi; Shen Zhiqiang; Gan Conggui [Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030 (China); Ellingsen, Simon P.; Titmarsh, Anita, E-mail: chenxi@shao.ac.cn [School of Mathematics and Physics, University of Tasmania, Hobart, Tasmania (Australia)
2011-09-01T23:59:59.000Z
We report the results of a systematic survey for 95 GHz class I methanol masers toward a new sample of 192 massive young stellar object candidates associated with ongoing outflows (known as extended green objects or EGOs) identified from the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) survey. The observations were made with the Australia Telescope National Facility (ATNF) Mopra 22 m radio telescope and resulted in the detection of 105 new 95 GHz class I methanol masers. For 92 of the sources our observations provide the first identification of a class I maser transition associated with these objects (i.e., they are new class I methanol maser sources). Our survey proves that there is indeed a high detection rate (55%) of class I methanol masers toward EGOs. Comparison of the GLIMPSE point sources associated with EGOs with and without class I methanol maser detections shows that they have similar mid-IR colors, with the majority meeting the color selection criteria -0.6 < [5.8]-[8.0] < 1.4 and 0.5 < [3.6]-[4.5] < 4.0. Investigations of the Infrared Array Camera and Multiband Imaging Photometer for Spitzer 24 {mu}m colors and the associated millimeter dust clump properties (mass and density) of the EGOs for the sub-samples based on the class of methanol masers they are associated with suggest that the stellar mass range associated with class I methanol masers extends to lower masses than for class II methanol masers, or alternatively class I methanol masers may be associated with more than one evolutionary phase during the formation of a high-mass star.
Boyer, Edmond
Knowledge Sharing within Extended Enterprises: Case of Product Lifecycle Management systems Pierre, whether tacit or "explicited" by individuals within extended enterprises. Product Lifecycle Management extended enterprises throughout the entire lifecycle of a product. In this paper, we propose (1) to outline
Inflation beyond T-models and primordial B-modes
Yi-Fu Cai; Jinn-Ouk Gong; Shi Pi
2014-09-30T23:59:59.000Z
We describe extended theories which shares the gauge transformation symmetry of the T-models, and takes the T-models as well as Starobinsky model as special cases. We derive a general relation between the two slow-roll parameters, and find that a large class of models can be embedded. Such models include more general Starobinsky-like inflation as well as the chaotic inflation with a large tensor-to-scalar ratio consistent with the BICEP2 result.
Extend EnergyPlus to Support Evaluation, Design, and Operation of Low Energy Buildings
Cho, Heejin; Wang, Weimin; Makhmalbaf, Atefe; Yun, Kyung Tae; Glazer, Jason; Scheier, Larry; Srivastava, Viraj; Gowri, Krishnan
2011-12-21T23:59:59.000Z
During FY10-11, Pacific Northwest National Laboratory in collaboration with the EnergyPlus development team implemented the following high priority enhancements to support the simulation of high performance buildings: (1) Improve Autosizing of Heating, Ventilation, and Air Conditioning (HVAC) Components; (2) Life-Cycle Costing to Evaluate Energy Efficiency Upgrades; (3) Develop New Model to Capture Transformer Losses; (4) Enhance the Model for Electric Battery Storage; and (5) Develop New Model for Chiller-Tower Optimization. This report summarizes the technical background, new feature development and implementation details, and testing and validation process for these enhancements. The autosizing, life-cycle costing and transformer model enhancements/developments were included in EnergyPlus release Version 6.0, and the electric battery model development will be included in Version 7.0. The model development of chiller-tower optimization will be included in a later version (after Version 7.0).
U.S. Department of Energy to Extend Pacific Northwest National...
Office of Environmental Management (EM)
provides Battelle time to restructure its relationships with its customers and to put business models in place that will transition work currently performed under the Use...
Model Validation with Hybrid Dynamic Simulation
Huang, Zhenyu; Kosterev, Dmitry; Guttromson, Ross T.; Nguyen, Tony B.
2006-06-18T23:59:59.000Z
Abstract—Model validation has been one of the central topics in power engineering studies for years. As model validation aims at obtaining reasonable models to represent actual behavior of power system components, it has been essential to validate models against actual measurements or known benchmark behavior. System-wide model simulation results can be compared with actual recordings. However, it is difficult to construct a simulation case for a large power system such as the WECC system and to narrow down to problematic models in a large system. Hybrid dynamic simulation with its capability of injecting external signals into dynamic simulation enables rigorous comparison of measurements and simulation in a small subsystem of interest. This paper presents such a model validation methodology with hybrid dynamic simulation. Two application examples on generator and load model validation are presented to show the validity of this model validation methodology. This methodology is further extended for automatic model validation and dichotomous subsystem model validation.
The Author-Topic Model for Authors and Documents Michal Rosen-Zvi
Steyvers, Mark
- erative model for documents that extends La- tent Dirichlet Allocation (LDA; Blei, Ng, & Jordan, 2003- ing each document as a mixture of probabilistic top- ics (e.g., Blei, Ng, & Jordan, 2003; Hofmann-the-art approaches like Latent Dirichlet Allocation (Blei et al., 2003), and extends these approaches to author
Robert Youngblood
2011-01-01T23:59:59.000Z
Nuclear power has reliably and economically contributed almost 20% of electrical generation in the United States over the past two decades. It remains the single largest contributor (more than 70%) of non-greenhouse-gas-emitting electric power generation in the United States. By the year 2030, domestic demand for electrical energy is expected to grow to levels of 16 to 36% higher than 2007 levels. At the same time, most currently operating nuclear power plants will begin reaching the end of their 60 year operating licenses. Figure E 1 shows projected nuclear energy contribution to the domestic generating capacity. If current operating nuclear power plants do not operate beyond 60 years, the total fraction of generated electrical energy from nuclear power will begin to decline—even with the expected addition of new nuclear generating capacity. The oldest commercial plants in the United States reached their 40th anniversary in 2009. The U.S. Department of Energy Office of Nuclear Energy’s Research and Development (R&D) Roadmap has organized its activities in accordance with four objectives that ensure nuclear energy remains a compelling and viable energy option for the United States. The objectives are as follows: (1) develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the life of the current reactors; (2) develop improvements in the affordability of new reactors to enable nuclear energy to help meet the Administration’s energy security and climate change goals; (3) develop sustainable nuclear fuel cycles; and (4) understand and minimize risks of nuclear proliferation and terrorism. The Light Water Reactor Sustainability (LWRS) Program is the primary programmatic activity that addresses Objective 1. This document describes how Objective 1 and the LWRS Program will be implemented. The existing U.S. nuclear fleet has a remarkable safety and performance record and today accounts for 70% of the low greenhouse gas emitting domestic electricity production. Extending the operating lifetimes of current plants beyond 60 years and, where possible, making further improvements in their productivity will generate early benefits from research, development, and demonstration investments in nuclear power. DOE’s role in Objective 1 is to partner with industry and the Nuclear Regulatory Commission in appropriate ways to support and conduct the long-term research needed to inform major component refurbishment and replacement strategies, performance enhancements, plant license extensions, and age-related regulatory oversight decisions. The DOE research, development, and demonstration role will focus on aging phenomena and issues that require long-term research and are generic to reactor type. Cost-shared demonstration activities will be conducted when appropriate.
Robert Youngblood
2011-02-01T23:59:59.000Z
Nuclear power has reliably and economically contributed almost 20% of electrical generation in the United States over the past two decades. It remains the single largest contributor (more than 70%) of non-greenhouse-gas-emitting electric power generation in the United States. By the year 2030, domestic demand for electrical energy is expected to grow to levels of 16 to 36% higher than 2007 levels. At the same time, most currently operating nuclear power plants will begin reaching the end of their 60 year operating licenses. Figure E 1 shows projected nuclear energy contribution to the domestic generating capacity. If current operating nuclear power plants do not operate beyond 60 years, the total fraction of generated electrical energy from nuclear power will begin to decline—even with the expected addition of new nuclear generating capacity. The oldest commercial plants in the United States reached their 40th anniversary in 2009. The U.S. Department of Energy Office of Nuclear Energy’s Research and Development (R&D) Roadmap has organized its activities in accordance with four objectives that ensure nuclear energy remains a compelling and viable energy option for the United States. The objectives are as follows: (1) develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the life of the current reactors; (2) develop improvements in the affordability of new reactors to enable nuclear energy to help meet the Administration’s energy security and climate change goals; (3) develop sustainable nuclear fuel cycles; and (4) understand and minimize risks of nuclear proliferation and terrorism. The Light Water Reactor Sustainability (LWRS) Program is the primary programmatic activity that addresses Objective 1. This document describes how Objective 1 and the LWRS Program will be implemented. The existing U.S. nuclear fleet has a remarkable safety and performance record and today accounts for 70% of the low greenhouse gas emitting domestic electricity production. Extending the operating lifetimes of current plants beyond 60 years and, where possible, making further improvements in their productivity will generate early benefits from research, development, and demonstration investments in nuclear power. DOE’s role in Objective 1 is to partner with industry and the Nuclear Regulatory Commission in appropriate ways to support and conduct the long-term research needed to inform major component refurbishment and replacement strategies, performance enhancements, plant license extensions, and age-related regulatory oversight decisions. The DOE research, development, and demonstration role will focus on aging phenomena and issues that require long-term research and are generic to reactor type. Cost-shared demonstration activities will be conducted when appropriate.
ESBWR response to an extended station blackout/loss of all AC power
Barrett, A. J.; Marquino, W. [New Plants Engineering, GE Hitachi Nuclear Energy, M/CA 75, 3901 Castle Hayne Road, Wilmington, NC 28402 (United States)
2012-07-01T23:59:59.000Z
U.S. federal regulations require light water cooled nuclear power plants to cope with Station Blackouts for a predetermined amount of time based on design factors for the plant. U.S. regulations define Station Blackout (SBO) as a loss of the offsite electric power system concurrent with turbine trip and unavailability of the onsite emergency AC power system. According to U.S. regulations, typically the coping period for an SBO is 4 hours and can be as long as 16 hours for currently operating BWR plants. Being able to cope with an SBO and loss of all AC power is required by international regulators as well. The U.S. licensing basis for the ESBWR is a coping period of 72 hours for an SBO based on U.S. NRC requirements for passive safety plants. In the event of an extended SBO (viz., greater than 72 hours), the ESBWR response shows that the design is able to cope with the event for at least 7 days without AC electrical power or operator action. ESBWR is a Generation III+ reactor design with an array of passive safety systems. The ESBWR primary success path for mitigation of an SBO event is the Isolation Condenser System (ICS). The ICS is a passive, closed loop, safety system that initiates automatically on a loss of power. Upon Station Blackout or loss of all AC power, the ICS begins removing decay heat from the Reactor Pressure Vessel (RPV) by (i) condensing the steam into water in heat exchangers located in pools of water above the containment, and (ii) transferring the decay heat to the atmosphere. The condensed water is then returned by gravity to cool the reactor again. The ICS alone is capable of maintaining the ESBWR in a safe shutdown condition after an SBO for an extended period. The fuel remains covered throughout the SBO event. The ICS is able to remove decay heat from the RPV for at least 7 days and maintains the reactor in a safe shutdown condition. The water level in the RPV remains well above the top of active fuel for the duration of the SBO event. Beyond 7 days, only a few simple actions are needed to cope with the SBO for an indefinite amount of time. The operation of the ICS as the primary success path for mitigation of an SBO, allows for near immediate plant restart once power is restored. (authors)
Syndetic model of fundamental interactions
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Ma, Ernest
2015-02-01T23:59:59.000Z
The standard model of quarks and leptons is extended to connect three outstanding issues in particle physics and astrophysics: (1) the absence of strong CPnonconservation, (2) the existence of dark matter, and (3) the mechanism of nonzero neutrino masses, and that of the first family of quarks and leptons, all in the context of having only one Higgs boson in a renormalizable theory. Some phenomenological implications are discussed.
Interactive modeler for cloth draping
Thumrugoti, Umakanth
1994-01-01T23:59:59.000Z
2. Bezier Curves . 3. Hyperpatches. . . B. Deformation 1. Free Form Deformation (FFD) 2. Extended Free Form Deformation (EFFD) . C. Overview of the Model 1. Lattice 2. Newton ? Raphson Method . 3. LU Decomposition . 4. Newell's Method... 14 14 15 20 25 25 29 30 30 33 35 37 38 39 39 40 41 46 46 51 54 Page REFERENCES . APPENDIX A A. Menubar B. Lattice Buttons VITA 59 59 59 vn LIST OF FIGURES FIGURE Page Parallelepipedical 3D lattice A Bezier curve...
DEEP CHANDRA OBSERVATIONS OF THE EXTENDED GAS SLOSHING SPIRAL IN A2029
Paterno-Mahler, R.; Blanton, E. L. [Astronomy Department and Institute for Astrophysical Research, Boston University, 725 Commonwealth Ave, Boston, MA 02215 (United States); Randall, S. W. [Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Clarke, T. E., E-mail: rachelpm@bu.edu, E-mail: eblanton@bu.edu, E-mail: srandall@head.cfa.harvard.edu, E-mail: tracy.clarke@nrl.navy.mil [Naval Research Laboratory, Code 7213, 4555 Overlook Avenue Southwest, Washington, DC 20375 (United States)
2013-08-20T23:59:59.000Z
Recent X-ray observations of galaxy clusters have shown that there is substructure present in the intracluster medium (ICM), even in clusters that are seemingly relaxed. This substructure is sometimes a result of sloshing of the ICM, which occurs in cool core clusters that have been disturbed by an off-axis merger with a sub-cluster or group. We present deep Chandra observations of the cool core cluster Abell 2029, which has a sloshing spiral extending radially outward from the center of the cluster to approximately 400 kpc at its fullest extent-the largest continuous spiral observed to date. We find a surface brightness excess, a temperature decrement, a density enhancement, an elemental abundance enhancement, and a smooth pressure profile in the area of the spiral. The sloshing gas seems to be interacting with the southern lobe of the central radio galaxy, causing it to bend and giving the radio source a wide-angle tail (WAT) morphology. This shows that WATs can be produced in clusters that are relatively relaxed on large scales. We explore the interaction between heating and cooling in the central region of the cluster. Energy injection from the active galactic nucleus is likely insufficient to offset the cooling, and sloshing may be an important additional mechanism in preventing large amounts of gas from cooling to very low temperatures.
Extending the redshift-distance relation in Cosmological General Relativity to higher redshifts
John G. Hartnett
2007-11-22T23:59:59.000Z
The redshift-distance modulus relation, the Hubble Diagram, derived from Cosmological General Relativity has been extended to arbitrarily large redshifts. Numerical methods were employed and a density function was found that results in a valid solution of the field equations at all redshifts. The extension has been compared to 302 type Ia supernova data as well as to 69 Gamma-ray burst data. The latter however do not not truly represent a `standard candle' as the derived distance modulii are not independent of the cosmology used. Nevertheless the analysis shows a good fit can be achieved without the need to assume the existence of dark matter. The Carmelian theory is also shown to describe a universe that is always spatially flat. This results from the underlying assumption of the energy density of a cosmological constant $\\Omega_{\\Lambda} = 1$, the result of vacuum energy. The curvature of the universe is described by a \\textit{spacevelocity} metric where the energy content of the curvature at any epoch is $\\Omega_K = \\Omega_{\\Lambda} - \\Omega = 1-\\Omega$, where $\\Omega$ is the matter density of the universe. Hence the total density is always $\\Omega_K + \\Omega = 1$
Extended two-dimensional characteristic framework to study nonrotating black holes
W. Barreto
2014-07-07T23:59:59.000Z
We develop a numerical solver, that extends the computational framework considered in [Phys. Rev. D 65, 084016 (2002)], to include scalar perturbations of nonrotating black holes. The nonlinear Einstein-Klein-Gordon equations for a massless scalar field minimally coupled to gravity are solved in two spatial dimensions (2D). The numerical procedure is based on the ingoing light cone formulation for an axially and reflection symmetric spacetime. The solver is second order accurate and was validated in different ways. We use for calibration an auxiliary 1D solver with the same initial and boundary conditions and the same evolution algorithm. We reproduce the quasinormal modes for the massless scalar field harmonics $\\ell = 0$, $1$ and $2$. For these same harmonics, in the linear approximation, we calculate the balance of energy between the black hole and the world tube. As an example of nonlinear harmonic generation, we show the distortion of a marginally trapped two-surface approximated as a q-boundary and based upon the harmonic $\\ell=2$. Additionally, we study the evolution of the $\\ell = 8$ harmonic in order to test the solver in a spacetime with a complex angular structure. Further applications and extensions are briefly discussed.