Wehenkel, Louis
Mathema'cally · Two formula'ons Maximum variance: find the direc'ons that maximize the variance of the projected data Minimumerror formula'on: minimizes the reconstruc'on error of the projected data #12
Free-standing AlxGa1-xAs heterostructures by gas-phase etching of germanium
As compounds encompassing low aluminum content AlGaAs, InGaAs, InGaP, etc. , typi- cally, a sacrificial Al
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:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (Million CubicRefinersUpcoming Release ofTableScientiststom D m r eSelf-consistent treatment of
Linear Consistency Testing Yonatan Aumann
Sudan, Madhu
of Blum, Luby and Rubinfeld [?] to check the linear-consistency of three functions f1, f2, f3 mapping and check if f1(x) + f2(y) = f3(x + y). We analyze this test for two cases: (1) G and H are arbitrary the consistency of multiple functions. Given a triple of functions f1, f2, f3 : G H, we say that they are "linear
Evaluation of Consistent Logical Checkpointing
Kaul, Surbhi
1995-01-01T23:59:59.000Z
is cliscussed in more cletail in the next chapter lvhich pr smlts tht val'iations of the consist( nt logical ?heckpointing scheme. Applicatiuu '('('Itl& L's(&r Cu Illnunication The next set of experime!its !s pet fol meri uitli aii application lvith a...
Consistently violating the non-Gaussian consistency relation
Mooij, Sander; Romano, Antonio E
2015-01-01T23:59:59.000Z
Non-attractor models of inflation are characterized by the super-horizon evolution of curvature perturbations, introducing a violation of the non-Gaussian consistency relation between the bispectrum's squeezed limit and the power spectrum's spectral index. In this work we show that the bispectrum's squeezed limit of non-attractor models continues to respect a relation dictated by the evolution of the background. We show how to derive this relation using only symmetry arguments, without ever needing to solve the equations of motion for the perturbations.
Qualitative reasoning about consistency in geographic information
Duckham, Matt
Qualitative reasoning about consistency in geographic information Matt Duckham a,, Jenny Lingham b reasoning system for describing consistency between different geographic data sets. Consistency is closely related to issues of uncertainty and interoperability in geographic information, and the paper assesses
fuzzy-logic sig- nal-processing and sensor-fusion algorithm with quaternion implementation to compute to use low-cost MEMS gyro- scopes and accelerometers, about $30 each, which are typi- cally noisy meaningful and accurate results with the superior signal- processing and sensor-fusion algorithm
Multiple Shear Key Connections for Precast
for elevator shaft shear wall panelsOne of the main concerns in precast 104 #12;utilize a combination elevator shaft shear wall panels. The tests results were used to develop analytical models to predict the shear Synopsis Seven horizontal connections typi- cally used in precast concrete elevator shaft shear
AN ONLINE ALGORITHM FOR BLIND EXTRACTION OF SOURCES WITH DIFFERENT DYNAMICAL STRUCTURES
Cichocki, Andrzej
in biomedical signal processing, where the signals are typi- cally weak and noisy, the channels are heavily signals are denoted by s(k) = [s1(k), . . . , sM (k)]T , and the linear instantaneous mixing process(k) are column vectors and (·)T denotes the vector transpose. The signal separation process aims at find- ing
Hu, Wenchuang "Walter"
In contrast to devices for CMOS application, biosensing FET devices typi- cally employ a back be mitigated with a top-down approach. However, lithographically fabricated back-gated NWFETs with long temperature or drain bias5,6,9,20,21 because increase in carrier energy, by increasing temperature or drain
A Learning-Based Approach to Reactive Security Adam Barth1
Song, Dawn
Information Security Officer (CISO) to man- age the enterprise's information security risks. Typically the enterprise "insecure" until every last vulnerability is plugged, CISOs typi- cally perform a cost-benefit analysis to identify which risks to address, but what constitutes an effective CISO strategy
A Learning-Based Approach to Reactive Security , Benjamin I. P. Rubinstein
Rubinstein, Benjamin
Ocer (CISO) to man- age the enterprise's information security risks. Typically, an enterprise has many insecure until every last vulnerability is plugged, CISOs typi- cally perform a cost-benet analysis to identify which risks to address, but what constitutes an eective CISO strategy? The conventional wisdom [28
BioMathematics Education Issues James K. Peterson
Peterson, James K
maintenance people. I remember in particular a pump repairman named Dave. This was about 1973 and even in their maintenance procedures and the pumps they repaired typi- cally lasted only a month or so. So, the general used huge pumps driven by as much as 5000 hp motors. All of them had a typical flange and seal design
Nanowires As Building Blocks for Bottom-Up Nanotechnology
Wang, Zhong L.
#12;Nanowires As Building Blocks for Bottom-Up Nanotechnology The field of nanotechnology/or combinations of function in an integrated nanosystem. To enable this bottom-up approach for nanotechnology-dimensional (1D) nanostruc- tures at the forefront of nanoscience and nanotechnology. NWs and NBs are typi- cally
Whitehouse, Kamin
employ a fixed set of code optimizations for a particular target platform. We present a macroprogramming that the target platform is a system of independent devices. Wireless em- bedded networks have traditionally platform, typi- cally a processor or micro-controller. A macroprogram com- piler (Figure 1) translates
Neutron Slowing Down in a Detector with Absorption Sara A. Pozzi*
Pázsit, Imre
of scattering collisions undergone by fast neutrons as they slow down until they are absorbed was presented predominantly when the neutron has lost most of its energy in the pre- vious scatterings. The energy deposited in each individual scattering that a neutron undergoes in the scintillator cannot typi- cally be resolved
Newman, David
blackouts of electric power systems are typi- cally caused by cascading failure of heavily loaded system, loading-dependent cascading failure occurs in large blackouts of electric power transmission systems components. We introduce the CASCADE model of cascad- ing failure of a system with many identical components
Pedram, Massoud
rates are typi- cally not matched with each other. Conventional fossil fuel and nuclear power plants. This solution (known as peak shaving) minimizes energy waste and provides stability to the power generation grant funded by the MEST (No. 2010-0017680). The ICT at Seoul National University provides research
Trading Water for Carbon with Biological Carbon Sequestration
Nacional de San Luis, Universidad
Trading Water for Carbon with Biological Carbon Sequestration Robert B. Jackson,1 * Esteban G. Farley,1 David C. le Maitre,5 Bruce A. McCarl,6 Brian C. Murray7 Carbon sequestration strategies plantations feature prominently among tools for carbon sequestration (18). Plantations typi- cally combine
Output Feedback Control of Parabolic PDE Systems with Input Constraints1
Sontag, Eduardo
the fast and slow eigenvalues of the spatial differential operator increases. Key words: Parabolic PDE by quasi-linear parabolic PDEs. Examples in- clude tubular reactors, packed-bed reactors, and chemical vapor deposition reactors. Parabolic PDE systems typi- cally involve spatial differential operators
Meehl, Gerald A.
2000-01-01T23:59:59.000Z
13. A. T. Anderson, A. M. Davis, F. Lu, J. Petrol. 41, 449 (2000). 14. M. R. Reid, C. D. Coath, T. M. Harrison, K. D. McKee- gan, Earth Planet. Sci. Lett. 150, 27 (1997). 15. C. A. Chesner, J. Petrol. Mineral. Petrol. 29, 275 (1970). 20. MnO/MgO in residual melts of silicic magmas typi- cally increases
Consistent nonlinear dynamics: identifying model inadequacy
Patrick E. McSharry; Leonard A. Smith
2004-03-09T23:59:59.000Z
Empirical modelling often aims for the simplest model consistent with the data. A new technique is presented which quantifies the consistency of the model dynamics as a function of location in state space. As is well-known, traditional statistics of nonlinear models like root-mean-square (RMS) forecast error can prove misleading. Testing consistency is shown to overcome some of the deficiencies of RMS error, both within the perfect model scenario and when applied to data from several physical systems using previously published models. In particular, testing for consistent nonlinear dynamics provides insight towards (i) identifying when a delay reconstruction fails to be an embedding, (ii) allowing state dependent model selection and (iii) optimising local neighbourhood size. It also provides a more relevant (state dependent) threshold for identifying false nearest neighbours.
A Generalization of Generalized Arc Consistency
Mackworth, Alan K.
- binary classic constraint satisfaction problems (CSPs). Based on the Semiring CSP and Valued CSP such as fuzzy CSP, probabilistic CSP, max CSP, and weighted CSP. This extension is based on an idempotent satisfaction problem (CSP), local consistency can be char- acterized as deriving new constraints based on local
Normality: A Consistency Condition for Concurrent Objects
Garg, Vijay
Normality: A Consistency Condition for Concurrent Objects Vijay K. GARG \\Lambda Michel RAYNAL ECE for concurrent objects (objects shared by con current processes) that exploits the semantics of abstract data types. It provides the illusion that each operation applied by concurrent processes takes effect
Consistency of Posterior Distributions for Neural Networks
Consistency of Posterior Distributions for Neural Networks Herbert Lee \\Lambda May 21, 1998 Abstract In this paper we show that the posterior distribution for feedforward neural networks is asymp neural networks for nonparametric regression in a Bayesian framework. Keywords: Bayesian statistics
http://geo.mff.cuni.cz/~lh/OFY056 DATOV TYPY
Hanyk, Ladislav
, dynamická alokace mezí i pamti pomocí SetLength a Finalize dolní mez vzdy 0 (funkce Low), horní mez dolní mez vzdy 0 (funkce Low), horní mez = velikost 1 (funkce High = Length 1) Píklad: Statická
Self-consistent resonance in a plasma
Evangelos Chaliasos
2005-10-14T23:59:59.000Z
As an application of the solution of the equations of electromagnetic self-consistency in a plasma, found in a previous paper, the study of controlled thermo-nuclear fusion is undertaken. This study utilizes the resonance which can be developed in the plasma, as indicated by the above solution, and is based to an analysis of the underlying forced oscillation under friction. As a consequence, we find that, in this way, controlled thermonuclear fusion seems now to be feasible in principle. The treatment is rather elementary, and it may serve as a guide for more detailed calculations.
Self-consistent Gravitational Lens Reconstruction
S. Dye; A. Taylor
1998-08-13T23:59:59.000Z
We present a new method for directly determining accurate, self-consistent cluster lens mass and shear maps in the strong lensing regime from the magnification bias of background galaxies. The method relies upon pixellisation of the surface mass density distribution which allows us to write down a simple, solvable set of equations. We also show how pixellisation can be applied to methods of mass determination from measurements of shear and present a simplified method of application. The method is demonstrated with cluster models and applied to magnification data from the lensing cluster Abell 1689.
Consistency relations for the conformal mechanism
Creminelli, Paolo [Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151, Trieste (Italy); Joyce, Austin; Khoury, Justin [Center for Particle Cosmology, Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 (United States); Simonovi?, Marko, E-mail: creminel@ictp.it, E-mail: joyceau@sas.upenn.edu, E-mail: jkhoury@sas.upenn.edu, E-mail: marko.simonovic@sissa.it [SISSA, via Bonomea 265, 34136, Trieste (Italy)
2013-04-01T23:59:59.000Z
We systematically derive the consistency relations associated to the non-linearly realized symmetries of theories with spontaneously broken conformal symmetry but with a linearly-realized de Sitter subalgebra. These identities relate (N+1)-point correlation functions with a soft external Goldstone to N-point functions. These relations have direct implications for the recently proposed conformal mechanism for generating density perturbations in the early universe. We study the observational consequences, in particular a novel one-loop contribution to the four-point function, relevant for the stochastic scale-dependent bias and CMB ?-distortion.
The consistency test on the cosmic evolution
Gong, Yan; Zhang, Shuang-Nan; Chen, Xuelei
2015-01-01T23:59:59.000Z
We propose a new and robust method to test the consistency of the cosmic evolution given by a cosmological model. It is realized by comparing the combined quantity r_d^CMB/D_V^SN, which is derived from the comoving sound horizon r_d from cosmic microwave background (CMB) measurements and the effective distance D_V derived from low-redshift Type-Ia supernovae (SNe Ia) data, with direct and independent r_d/D_V obtained by baryon acoustic oscillation (BAO) measurements at median redshifts. We apply this test method for the LCDM and wCDM models, and investigate the consistency of the derived value of r_d/D_V from Planck 2015 and the SN Ia data sets of Union2.1 and JLA (z<1.5), and the r_d/D_V directly given by BAO data from six-degree-field galaxy survey (6dFGS), Sloan Digital Sky Survey Data Release 7 Main Galaxy Survey (SDSS-DR7 MGS), DR11 of SDSS-III, WiggleZ and Ly-alpha forecast surveys from Baryon Oscillation Spectroscopic Data (BOSS) DR-11 over 0.1
On the consistent use of Constructed Observables
Michael Trott
2015-01-17T23:59:59.000Z
We define "constructed observables" as relating experimental measurements to terms in a Lagrangian while simultaneously making assumptions about possible deviations from the Standard Model (SM), in other Lagrangian terms. Ensuring that the SM effective field theory (EFT) is constrained correctly when using constructed observables requires that their defining conditions are imposed on the EFT in a manner that is consistent with the equations of motion. Failing to do so can result in a "functionally redundant" operator basis and the wrong expectation as to how experimental quantities are related in the EFT. We illustrate the issues involved considering the $\\rm S$ parameter and the off shell triple gauge coupling (TGC) verticies. We show that the relationships between $h \\rightarrow V \\bar{f} \\, f$ decay and the off shell TGC verticies are subject to these subtleties, and how the connections between these observables vanish in the limit of strong bounds due to LEP. The challenge of using constructed observables to consistently constrain the Standard Model EFT is only expected to grow with future LHC data, as more complex processes are studied.
Self-consistent bounces in two dimensions
Baacke, Juergen; Kevlishvili, Nina [Institut fuer Physik, Universitaet Dortmund, D-44221 Dortmund (Germany)
2005-01-15T23:59:59.000Z
We compute bounce solutions describing false vacuum decay in a {phi}{sup 4} model in two dimensions in the Hartree approximation, thus going beyond the usual one-loop corrections to the decay rate. We use zero energy mode functions of the fluctuation operator for the numerical computation of the functional determinant and the Green's function. We thus avoid the necessity of discretizing the spectrum, as it is necessary when one uses numerical techniques based on eigenfunctions. Regularization is performed in analogy of standard perturbation theory; the renormalization of the Hartree approximation is based on the two-particle point-irreducible scheme. The iteration towards the self-consistent solution is found to converge for some range of the parameters. Within this range we find the corrections to the leading one-loop approximation to be relatively small, not exceeding 1 order of magnitude in the total transition rate.
On the consistent use of Constructed Observables
Trott, Michael
2015-01-01T23:59:59.000Z
We define "constructed observables" as relating experimental measurements to terms in a Lagrangian while simultaneously making assumptions about possible deviations from the Standard Model (SM), in other Lagrangian terms. Ensuring that the SM effective field theory (EFT) is constrained correctly when using constructed observables requires that their defining conditions are imposed on the EFT in a manner that is consistent with the equations of motion. Failing to do so can result in a "functionally redundant" operator basis and the wrong expectation as to how experimental quantities are related in the EFT. We illustrate the issues involved considering the $\\rm S$ parameter and the off shell triple gauge coupling (TGC) verticies. We show that the relationships between $h \\rightarrow V \\bar{f} \\, f$ decay and the off shell TGC verticies are subject to these subtleties, and how the connections between these observables vanish in the limit of strong bounds due to LEP. The challenge of using constructed observables...
Reliability and Consistency of Surface Contamination Measurements
Rouppert, F.; Rivoallan, A.; Largeron, C.
2002-02-26T23:59:59.000Z
Surface contamination evaluation is a tough problem since it is difficult to isolate the radiations emitted by the surface, especially in a highly irradiating atmosphere. In that case the only possibility is to evaluate smearable (removeable) contamination since ex-situ countings are possible. Unfortunately, according to our experience at CEA, these values are not consistent and thus non relevant. In this study, we show, using in-situ Fourier Transform Infra Red spectrometry on contaminated metal samples, that fixed contamination seems to be chemisorbed and removeable contamination seems to be physisorbed. The distribution between fixed and removeable contamination appears to be variable. Chemical equilibria and reversible ion exchange mechanisms are involved and are closely linked to environmental conditions such as humidity and temperature. Measurements of smearable contamination only give an indication of the state of these equilibria between fixed and removeable contamination at the time and in the environmental conditions the measurements were made.
Basis Token Consistency A Practical Mechanism for Strong Web Cache Consistency
call \\Basis Token Consistency" or BTC; when im- plemented at the server, this mechanism allows any between the BTC algorithm and the use of the Time-To-Live (TTL) heuristic. #3; This research was supported
Generalized contexts and consistent histories in quantum mechanics
Losada, Marcelo [Instituto de Física Rosario, Pellegrini 250, 2000 Rosario (Argentina); Laura, Roberto, E-mail: rlaura@fceia.unr.edu.ar [Facultad de Ciencias Exactas, Ingeniería y Agrimensura, Pellegrini 250, 2000 Rosario (Argentina); Instituto de Física Rosario, Pellegrini 250, 2000 Rosario (Argentina)
2014-05-15T23:59:59.000Z
We analyze a restriction of the theory of consistent histories by imposing that a valid description of a physical system must include quantum histories which satisfy the consistency conditions for all states. We prove that these conditions are equivalent to imposing the compatibility conditions of our formalism of generalized contexts. Moreover, we show that the theory of consistent histories with the consistency conditions for all states and the formalism of generalized context are equally useful representing expressions which involve properties at different times.
WELL-FORMEDNESS, CONSISTENCY AND COMPLETENESS OF GRAPHIC MODELS
Zhu, Hong
WELL-FORMEDNESS, CONSISTENCY AND COMPLETENESS OF GRAPHIC MODELS HONG ZHU Department of Computing@yahoo.com ABSTRACT This paper clarifies the notions of well-formedness, consistency and completeness of graphic languages, Well-formedness, Consistency constraints, Completeness constraints, Type systems, Formal
open source scalable vector graphics editor vektorov grafika nativn formt SVG
Cerveny, Vlastislav
jednotlivých nod typy nod, typy spojnic slucování, dlení, ... zjednodusení cesty (Ctrl+L) snapping tweak tool
California Department of Fish and Wildlife Consistency Determination...
search OpenEI Reference LibraryAdd to library Web Site: California Department of Fish and Wildlife Consistency Determination Webpage Abstract This website explains the...
Consistency of robust optimization with application to portfolio ...
Megiddo
2010-09-26T23:59:59.000Z
very general portfolio and risk constraints. Further, consistency will also carry ...... Quantitative Analysis, 42(3):621–656, 2007. [21] A. Kirsch. An Introduction to ...
Quantitative verification of ab initio self-consistent laser theory
Stone, A. Douglas
1564 (1998). 6. O. Painter, R. K. Lee, A. Scherer, A. Yariv, J. D. O'Brien, P. D. Dapkus, and I. Kim, "TwoQuantitative verification of ab initio self-consistent laser theory Li Ge,1 Robert J. Tandy,1 A¨ureci, A. D. Stone, and B. Collier, "Self-consistent multimode lasing theory for complex or random lasing
Dynamic Consistency in Process Algebra: From Paradigm to ACP
de Vink, Erik
Dynamic Consistency in Process Algebra: From Paradigm to ACP S. Andovaa, , L.P.J. Groenewegenb , E: branching bisimulation, collaboration, dynamic consistency, dynamic constraint, Paradigm, process algebra coupled, but structured aggregation of components, is connected to the compu- tational rigor of process
Efficient Consistency Proofs for Generalized Queries on a Committed Database
International Association for Cryptologic Research (IACR)
Efficient Consistency Proofs for Generalized Queries on a Committed Database Rafail Ostrovsky UCLA@csail.mit.edu July 20, 2004 Abstract A consistent query protocol (CQP) allows a database owner to publish a very short string c which commits her and everybody else to a particular database D, so that any copy
Efficient Consistency Proofs for Generalized Queries on a Committed Database
International Association for Cryptologic Research (IACR)
Efficient Consistency Proofs for Generalized Queries on a Committed Database #3; Rafail Ostrovsky asmith@csail.mit.edu July 20, 2004 Abstract A consistent query protocol (CQP) allows a database owner to publish a very short string c which commits her and everybody else to a particular database D, so that any
Harmonic superspace formalism and the consistent chiral anomaly
Li, W.
1986-08-01T23:59:59.000Z
The harmonic superspace formalism has been used to construct the consistent chiral anomaly in N = 1, d = 6 supersymmetric Yang-Mills thoery. The expressions of the gauge anomaly ..delta../sub s//sup phi/ and of the supersymmetric anomaly ..delta../sub SUSY//sup phi/ are given together with the consistent condition. 7 refs.
Consistency Testing of the IRDF-2002 Dosimetry Cross Section Library
Griffin, P.J. [Nuclear Technologies Department, Sandia National Laboratories, Albuquerque, NM 87185-1146 (United States)
2005-05-24T23:59:59.000Z
The new IRDF-2002 dosimetry cross-section library was completed by the IAEA in January 2004. A rigorous process was followed in the selection of the recommended dosimetry cross sections. The cross-section selection was followed with a consistency testing. This paper reports on the results of the consistency testing. All candidate selections passed the acceptance testing criteria and the library release is pending. Observations are made on areas that need improvement in the cross sections and in the scope of the consistency testing.
Emergent noncommutative gravity from a consistent deformation of gauge theory
Cortese, Ignacio; Garcia, J Antonio [Departamento de Fisica de Altas Energias, Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico D. F. 04510 (Mexico)
2010-05-15T23:59:59.000Z
Starting from a standard noncommutative gauge theory and using the Seiberg-Witten map, we propose a new version of a noncommutative gravity. We use consistent deformation theory starting from a free gauge action and gauging a killing symmetry of the background metric to construct a deformation of the gauge theory that we can relate with gravity. The result of this consistent deformation of the gauge theory is nonpolynomial in A{sub {mu}.} From here we can construct a version of noncommutative gravity that is simpler than previous attempts. Our proposal is consistent and is not plagued with the problems of other approaches like twist symmetries or gauging other groups.
Consistent Kaluza-Klein truncations via exceptional field theory
Hohm, Olaf
We present the generalized Scherk-Schwarz reduction ansatz for the full supersymmetric exceptional field theory in terms of group valued twist matrices subject to consistency equations. With this ansatz the field equations ...
Self-consistent resummation scheme in scalar QED
Carrington, M.E. (Physics Department, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, R3B 2E9 (Canada))
1993-10-15T23:59:59.000Z
In this paper we derive a resummation scheme that may be useful in the calculation of finite temperature processes that involve infrared-divergent diagrams. We discuss the inclusion of self-consistent vertices in calculations of diagrams with very soft external momenta. We work with scalar QED and show that the use of self-consistent vertices in the infrared limit of the retarded photon polarization tensor is equivalent to the resummation of dominant diagrams. To lowest order in an expansion about the parameter that is to be determined self-consistently, we find that the result is independent of this parameter and equal to the expression obtained with uncorrected lines and vertices. The motivation for this work is the hope that it will be possible to use this technique to perform self-consistent calculations beyond leading order.
Time consistency and risk averse dynamic decision models ...
2013-05-02T23:59:59.000Z
sistent models as we provide practitioners with an intuitive economic inter- pretation for the ... ning and financial engineering problems. Based on ... consistency is shown to be one basic requirement to get suitable optimal de- cisions, in ...
Multiple choice of gauge generators and consistency of interactions
S. L. Lyakhovich; A. A. Sharapov
2014-08-07T23:59:59.000Z
It is usually assumed that any consistent interaction either deforms or retains the gauge symmetries of the corresponding free theory. We propose a simple model where an obvious irreducible gauge symmetry does not survive an interaction, while the interaction is consistent as it preserves the number of physical degrees of freedom. The model turns out admitting a less obvious reducible set of gauge generators which is compatible with the interaction and smooth in coupling constant. Possible application to gravity models is discussed.
"Constraint consistency" at all orders in Cosmological perturbation theory
Nandi, Debottam
2015-01-01T23:59:59.000Z
We study the equivalence of two - order-by-order Einstein's equation and Reduced action - approaches to cosmological perturbation theory at all orders for different models of inflation. We point out a crucial consistency check which we refer to as "Constraint consistency" that needs to be satisfied. We propose a quick and efficient method to check the consistency for any model including modified gravity models. Our analysis points out an important feature which is crucial for inflationary model building i.e., all `constraint' inconsistent models have higher order Ostrogradsky's instabilities but the reverse is not true. In other words, one can have models with constraint lapse function and shift vector, though it may have Ostrogradsky's instabilities. We also obtain the single variable equation for non-canonical scalar field in the limit of power-law inflation for the second-order perturbed variables.
"Constraint consistency" at all orders in Cosmological perturbation theory
Debottam Nandi; S. Shankaranarayanan
2015-02-12T23:59:59.000Z
We study the equivalence of two - order-by-order Einstein's equation and Reduced action - approaches to cosmological perturbation theory at all orders for different models of inflation. We point out a crucial consistency check which we refer to as "Constraint consistency" that needs to be satisfied. We propose a quick and efficient method to check the consistency for any model including modified gravity models. Our analysis points out an important feature which is crucial for inflationary model building i.e., all `constraint' inconsistent models have higher order Ostrogradsky's instabilities but the reverse is not true. In other words, one can have models with constraint lapse function and shift vector, though it may have Ostrogradsky's instabilities. We also obtain the single variable equation for non-canonical scalar field in the limit of power-law inflation for the second-order perturbed variables.
Consistent Kaluza-Klein Truncations via Exceptional Field Theory
Hohm, Olaf
2014-01-01T23:59:59.000Z
We present the generalized Scherk-Schwarz reduction ansatz for the full supersymmetric exceptional field theory in terms of group valued twist matrices subject to consistency equations. With this ansatz the field equations precisely reduce to those of lower-dimensional gauged supergravity parametrized by an embedding tensor. We explicitly construct a family of twist matrices as solutions of the consistency equations. They induce gauged supergravities with gauge groups SO(p,q) and CSO(p,q,r). Geometrically, they describe compactifications on internal spaces given by spheres and (warped) hyperboloides $H^{p,q}$, thus extending the applicability of generalized Scherk-Schwarz reductions beyond homogeneous spaces. Together with the dictionary that relates exceptional field theory to D=11 and IIB supergravity, respectively, the construction defines an entire new family of consistent truncations of the original theories. These include not only compactifications on spheres of different dimensions (such as AdS$_5\\time...
Consistency test of neutrinoless double beta decay with one isotope
Michael Duerr; Manfred Lindner; Kai Zuber
2011-11-17T23:59:59.000Z
We discuss a consistency test which makes it possible to discriminate unknown nuclear background lines from neutrinoless double beta decay with only one isotope. By considering both the transition to the ground state and to the first excited $0^+$ state, a sufficiently large detector can reveal if neutrinoless double beta decay or some other nuclear physics process is at work. Such a detector could therefore simultaneously provide a consistency test for a certain range of Majorana masses and be sensitive to lower values of the effective Majorana mass.
Consistency test of neutrinoless double beta decay with one isotope
Duerr, Michael; Lindner, Manfred [Max-Planck-Institut fuer Kernphysik, Postfach 10 39 80, 69029 Heidelberg (Germany); Zuber, Kai [Technical University Dresden, Institut fuer Kern- und Teilchenphysik, 01069 Dresden (Germany)
2011-11-01T23:59:59.000Z
We discuss a consistency test which makes it possible to discriminate unknown nuclear background lines from neutrinoless double beta decay with only one isotope. By considering both the transition to the ground state and to the first excited 0{sup +} state, a sufficiently large detector can reveal if neutrinoless double beta decay or some other nuclear physics process is at work. Such a detector could therefore simultaneously provide a consistency test for a certain range of Majorana masses and be sensitive to lower values of the effective Majorana mass
Towards consistent nuclear models and comprehensive nuclear data evaluations
Bouland, O [Los Alamos National Laboratory; Hale, G M [Los Alamos National Laboratory; Lynn, J E [Los Alamos National Laboratory; Talou, P [Los Alamos National Laboratory; Bernard, D [FRANCE; Litaize, O [FRANCE; Noguere, G [FRANCE; De Saint Jean, C [FRANCE; Serot, O [FRANCE
2010-01-01T23:59:59.000Z
The essence of this paper is to enlighten the consistency achieved nowadays in nuclear data and uncertainties assessments in terms of compound nucleus reaction theory from neutron separation energy to continuum. Making the continuity of theories used in resolved (R-matrix theory), unresolved resonance (average R-matrix theory) and continuum (optical model) rangcs by the generalization of the so-called SPRT method, consistent average parameters are extracted from observed measurements and associated covariances are therefore calculated over the whole energy range. This paper recalls, in particular, recent advances on fission cross section calculations and is willing to suggest some hints for future developments.
Charge Lattices and Consistency of 6D Supergravity
Nathan Seiberg; Washington Taylor
2011-06-05T23:59:59.000Z
We extend the known consistency conditions on the low-energy theory of six-dimensional N = 1 supergravity. We review some facts about the theory of two-form gauge fields and conclude that the charge lattice Gamma for such a theory has to be self-dual. The Green-Schwarz anomaly cancellation conditions in the supergravity theory determine a sublattice of Gamma. The condition that this sublattice can be extended to a self-dual lattice Gamma leads to a strong constraint on theories that otherwise appear to be self-consistent.
Show No Weakness: Sequentially Consistent Specifications of TSO Libraries
Gotsman, Alexey
Show No Weakness: Sequentially Consistent Specifications of TSO Libraries Alexey Gotsman1.g., for those that are data-race free (DRF). However, performance-critical libraries often violate, it is important for these libraries to protect their otherwise well-behaved clients from the weaker memory model
Manipulator Control at Kinematic Singularities: A Dynamically Consistent Strategy
mechanism [6]. These two models are the bases for implementing the control strategy for kinematicManipulator Control at Kinematic Singularities: A Dynamically Consistent Strategy Kyong-Sok Chang Abstract This paper presents a general strategy for manipu- lator control at kinematic singularities. When
A static universe is consistent with type Ia supernovae observations
David F. Crawford
2015-04-18T23:59:59.000Z
This paper considers the hypothesis that the universe is static and demonstrates that type Ia supernova observations which appear to provide strong support for time dilation (and thus for an expanding universe) are equally consistent with a static universe. It is shown that a property of the standard calibration method means that regardless of what redshift dependence the measured light curve widths may have the calibrated widths always have little or no redshift dependence. An important consideration is the Phillips relation, a correlation between the peak-luminosity and the width of type Ia supernovae. Using the Phillips relation the analysis of a recent compilation of type Ia supernova observations is re-examined and it is shown that these observations are fully consistent with a static universe. It is also argued that the photometric redshift relation and spectroscopic ages are fully consistent with a static universe. As a separate but related issue it is shown that in the static model the density distribution of type Ia supernovae as a function of redshift agrees with the observations. All the evidence shows that the hypothesis is consistent with a static universe.
Making Sequential Consistency Practical in TitaniumPractical in Titanium
California at Berkeley, University of
Making Sequential Consistency Practical in TitaniumPractical in Titanium Amir Kamil, Jimmy Su, and Katherine Yelick, y , Titanium Group http://titanium.cs.berkeley.edu U.C. Berkeley November 15 2005November by another threadthread · Titanium, Java, UPC, and many other languages do not provide sequentiallanguages do
Consistent Validation of Manual and Automatic Sense Annotations with
Navigli, Roberto
interannotator agreement and voting can be applied to deal with the divergences between sense taggers. The tool employs semantic interconnection patterns to smooth possible divergences and support consistent an agreement. The problem depends on a variety of factors, ranging from the inherent subjectivity of the task
A nuclear Frechet space consisting of C -functions and
Vogt, Dietmar
A nuclear Fr´echet space consisting of C -functions and failing the bounded approximation property Dietmar Vogt Abstract An easy and transparent example is given of a nuclear Fre´echet space failing of Grothendieck whether every nuclear Fr´echet space has the bounded approximation property was open for quite
Error detection through consistency checking Peng Gong* Lan Mu#
Silver, Whendee
Error detection through consistency checking Peng Gong* Lan Mu# *Center for Assessment & Monitoring Hall, University of California, Berkeley, Berkeley, CA 94720-3110 gong@nature.berkeley.edu mulan, accessibility, and timeliness as recorded in the lineage data (Chen and Gong, 1998). Spatial error refers
On thermodynamically consistent schemes for phase field equations
Fife, Paul
and at the phase change front. A somewhat different approach of Charach and Zemel [2] combines bal- ance equationsOn thermodynamically consistent schemes for phase field equations C. Charach and P. C. Fife thermodynamics. The principal applications are to the solidification of a pure material and of a binary alloy
On the consistency of Prony's method and related algorithms
Smyth, Gordon K.
On the consistency of Prony's method and related algorithms M.H. Kahn M.S.Mackisack M.R.Osborne§ G and of related algorithms based on maximum likelihood is discussed as the number of observations n are obtained for the frequency estimation problem. However, the algorithms considered are all scaling dependent
AVMON: Optimal and Scalable Discovery of Consistent Availability Monitoring
Gupta, Indranil
AVMON: Optimal and Scalable Discovery of Consistent Availability Monitoring Overlays--This paper proposes to build overlays that help in the monitoring of long-term availability histories of such an availability monitoring overlay. We motivate six significant goals for these problems--the first three goals
Self-consistent methods in nuclear structure physics
Dobaczewski, J. [Warsaw Univ. (Poland). Inst. of Theoretical Physics][Oak Ridge National Lab., TN (United States). Joint Inst. for Heavy Ion Research]|[Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics
1997-11-01T23:59:59.000Z
The authors present a very brief description of the Hartree Fock method in nuclear structure physics, discuss the numerical methods used to solve the self-consistent equations, and analyze the precision and convergence properties of solutions. As an application, they present results pertaining to quadrupole moments and single-particle quadrupole polarizations in superdeformed nuclei with A {approximately} 60.
Consistent Data Assimilation of Isotopes: 242Pu and 105Pd
G. Palmiotti; H. Hiruta; M. Salvatores
2012-09-01T23:59:59.000Z
In this annual report we illustrate the methodology of the consistent data assimilation that allows to use the information coming from integral experiments for improving the basic nuclear parameters used in cross section evaluation. A series of integral experiments are analyzed using the EMPIRE evaluated files for 242Pu and 105Pd. In particular irradiation experiments (PROFIL-1 and -2, TRAPU-1, -2 and -3) provide information about capture cross sections, and a critical configuration, COSMO, where fission spectral indexes were measured, provides information about fission cross section. The observed discrepancies between calculated and experimental results are used in conjunction with the computed sensitivity coefficients and covariance matrix for nuclear parameters in a consistent data assimilation. The results obtained by the consistent data assimilation indicate that not so large modifications on some key identified nuclear parameters allow to obtain reasonable C/E. However, for some parameters such variations are outside the range of 1 s of their initial standard deviation. This can indicate a possible conflict between differential measurements (used to calculate the initial standard deviations) and the integral measurements used in the statistical data adjustment. Moreover, an inconsistency between the C/E of two sets of irradiation experiments (PROFIL and TRAPU) is observed for 242Pu. This is the end of this project funded by the Nuclear Physics Program of the DOE Office of Science. We can indicate that a proof of principle has been demonstrated for a few isotopes for this innovative methodology. However, we are still far from having explored all the possibilities and made this methodology to be considered proved and robust. In particular many issues are worth further investigation: • Non-linear effects • Flexibility of nuclear parameters in describing cross sections • Multi-isotope consistent assimilation • Consistency between differential and integral experiments
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Kutepov, A. L.
2015-07-22T23:59:59.000Z
Self-consistent solutions of Hedin's equations (HE) for the two-site Hubbard model (HM) have been studied. They have been found for three-point vertices of increasing complexity (? = 1 (GW approximation), ?? from the first-order perturbation theory, and the exact vertex ?E). Comparison is made between the cases when an additional quasiparticle (QP) approximation for Green's functions is applied during the self-consistent iterative solving of HE and when QP approximation is not applied. Results obtained with the exact vertex are directly related to the present open question—which approximation is more advantageous for future implementations, GW + DMFT or QPGW + DMFT.more »It is shown that in a regime of strong correlations only the originally proposed GW + DMFT scheme is able to provide reliable results. Vertex corrections based on Perturbation Theory systematically improve the GW results when full self-consistency is applied. The application of QP self-consistency combined with PT vertex corrections shows similar problems to the case when the exact vertex is applied combined with QP sc. An analysis of Ward Identity violation is performed for all studied in this work's approximations and its relation to the general accuracy of the schemes used is provided.« less
Formalization of the data flow diagram rules for consistency check
Ibrahim, Rosziati; 10.5121/ijsea.2010.1406
2010-01-01T23:59:59.000Z
In system development life cycle (SDLC), a system model can be developed using Data Flow Diagram (DFD). DFD is graphical diagrams for specifying, constructing and visualizing the model of a system. DFD is used in defining the requirements in a graphical view. In this paper, we focus on DFD and its rules for drawing and defining the diagrams. We then formalize these rules and develop the tool based on the formalized rules. The formalized rules for consistency check between the diagrams are used in developing the tool. This is to ensure the syntax for drawing the diagrams is correct and strictly followed. The tool automates the process of manual consistency check between data flow diagrams.
Branch dependence in the "consistent histories" approach to quantum mechanics
Thomas Müller
2006-11-12T23:59:59.000Z
In the consistent histories formalism one specifies a family of histories as an exhaustive set of pairwise exclusive descriptions of the dynamics of a quantum system. We define branching families of histories, which strike a middle ground between the two available mathematically precise definitions of families of histories, viz., product families and Isham's history projector operator formalism. The former are too narrow for applications, and the latter's generality comes at a certain cost, barring an intuitive reading of the ``histories''. Branching families retain the intuitiveness of product families, they allow for the interpretation of a history's weight as a probability, and they allow one to distinguish two kinds of coarse-graining, leading to reconsidering the motivation for the consistency condition.
Noncommuting Electric Fields and Algebraic Consistency in Noncommutative Gauge theories
Rabin Banerjee
2003-03-20T23:59:59.000Z
We show that noncommuting electric fields occur naturally in $\\theta$-expanded noncommutative gauge theories. Using this noncommutativity, which is field dependent, and a hamiltonian generalisation of the Seiberg-Witten Map, the algebraic consistency in the lagrangian and hamiltonian formulations of these theories, is established. A comparison of results in different descriptions shows that this generalised map acts as canonical transformation in the physical subspace only. Finally, we apply the hamiltonian formulation to derive the gauge symmetries of the action.
Consistent Kaluza-Klein Truncations via Exceptional Field Theory
Olaf Hohm; Henning Samtleben
2015-01-29T23:59:59.000Z
We present the generalized Scherk-Schwarz reduction ansatz for the full supersymmetric exceptional field theory in terms of group valued twist matrices subject to consistency equations. With this ansatz the field equations precisely reduce to those of lower-dimensional gauged supergravity parametrized by an embedding tensor. We explicitly construct a family of twist matrices as solutions of the consistency equations. They induce gauged supergravities with gauge groups SO(p,q) and CSO(p,q,r). Geometrically, they describe compactifications on internal spaces given by spheres and (warped) hyperboloides $H^{p,q}$, thus extending the applicability of generalized Scherk-Schwarz reductions beyond homogeneous spaces. Together with the dictionary that relates exceptional field theory to D=11 and IIB supergravity, respectively, the construction defines an entire new family of consistent truncations of the original theories. These include not only compactifications on spheres of different dimensions (such as AdS$_5\\times S^5$), but also various hyperboloid compactifications giving rise to a higher-dimensional embedding of supergravities with non-compact and non-semisimple gauge groups.
Consistent Evolution with Different Time-Slicings in Quantum Gravity
R. Cosgrove
1996-02-20T23:59:59.000Z
Rovelli's `` quantum mechanics without time'' motivates an intrinsically time-slicing independent picture of reduced phase space quantum gravity, which may be described as ``quantization after evolution''. Sufficient criteria for carrying out quantization after evolution are developed in terms of a general concept of the classical limit of quantum mechanics. If these criteria are satisfied then it is possible to have consistent unitary evolution of operators, with respect to an infinite parameter family of time-slicings (and probably all time-slicings), with the correct classical limit. The criteria are particularly amenable to study in (2+1)-dimensional gravity, where the reduced phase space is finite dimensional.
A consistent quantum model for continuous photodetection processes
M. C. de Oliveira; S. S. Mizrahi; V. V. Dodonov
2003-07-11T23:59:59.000Z
We are modifying some aspects of the continuous photodetection theory, proposed by Srinivas and Davies [Optica Acta 28, 981 (1981)], which describes the non-unitary evolution of a quantum field state subjected to a continuous photocount measurement. In order to remedy inconsistencies that appear in their approach, we redefine the `annihilation' and `creation' operators that enter in the photocount superoperators. We show that this new approach not only still satisfies all the requirements for a consistent photocount theory according to Srinivas and Davies precepts, but also avoids some weird result appearing when previous definitions are used.
A Consistent Firm Objective When Markets are Incomplete: Profit Maximization
Sabarwal, Tarun
2004-08-11T23:59:59.000Z
Markets are Incomplete: Profit Maximization Abstract In economies with private firm ownership, when markets are incomplete, and firm sharehold- ers change over time, there is no broad agreement on what ought to be a firm’s objective. It is shown that ex...-post, profit maximization is consistent with shareholder preferences in such economies; that is, along the equilibrium path, in every period and state of the world, every coalition of a firm’s shareholders in that period and state approves a profit...
Quark mean-field theory and consistency with nuclear matter
Dey, J.; Tomio, L. (Instituto de Fisica Teorica, Universidade Estadual Paulista, Rua Pamplona 145, 01405 Sao Paulo (Brazil)); Dey, M. (Department of Physics, Maulana Azad College, Calcutta 700 013 (India)); Frederico, T. (Institute for Nuclear Theory, Department of Physics, FM-15, University of Washington, Seattle, Washington (USA))
1991-11-01T23:59:59.000Z
1/{ital N}{sub {ital c}} expansion in QCD (with {ital N}{sub {ital c}} the number of colors) suggests using a potential from meson sector (e.g., Richardson) for baryons. For light quarks a {sigma} field has to be introduced to ensure chiral symmetry breaking ({chi}SB). It is found that nuclear matter properties can be used to pin down the {chi}SB modeling. All masses, {ital M}{sub {ital N}}, {ital m}{sub {sigma}}, {ital m}{sub {omega}}, are found to scale with density. The equations are solved self-consistently.
Consistent perturbative light front formulation of Yang-Mills theories
Morara, M.; Soldati, R. [Dipartimento di Fisica 'A. Righi', Universita di Bologna (Italy); McCartor, G. [Department of Physics, SMU, Dallas, Texas (United States)
1999-11-22T23:59:59.000Z
It is shown how to obtain the consistent light front form quantization of a non-Abelian pure Yang-Mills theory (gluondynamics) in the framework of the standard perturbative approach. After a short review of the previous attempts in the light cone gauge A{sub -}=0, it is explained how the difficulties can be overcome after turning to the anti light cone gauge A{sub +}=0. In particular, the generating functional of the renormalized Green's functions turns out to be the same as in the conventional instant form approach, leading to the Mandelstam-Leibbrandt prescription for the free gluon propagator.
SELF-CONSISTENT SIZE AND VELOCITY DISTRIBUTIONS OF COLLISIONAL CASCADES
Pan, Margaret [Department of Astronomy, University of California, Berkeley, CA 94720 (United States); Schlichting, Hilke E., E-mail: mpan@astro.berkeley.edu, E-mail: hilke@ucla.edu [Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095 (United States)
2012-03-10T23:59:59.000Z
The standard theoretical treatment of collisional cascades derives a steady-state size distribution assuming a single constant velocity dispersion for all bodies regardless of size. Here we relax this assumption and solve self-consistently for the bodies' steady-state size and size-dependent velocity distributions. Specifically, we account for viscous stirring, dynamical friction, and collisional damping of the bodies' random velocities in addition to the mass conservation requirement typically applied to find the size distribution in a steady-state cascade. The resulting size distributions are significantly steeper than those derived without velocity evolution. For example, accounting self-consistently for the velocities can change the standard q = 3.5 power-law index of the Dohnanyi differential size spectrum to an index as large as q = 4. Similarly, for bodies held together by their own gravity, the corresponding power-law index range 2.88 < q < 3.14 of Pan and Sari can steepen to values as large as q = 3.26. Our velocity results allow quantitative predictions of the bodies' scale heights as a function of size. Together with our predictions, observations of the scale heights for different-sized bodies for the Kuiper belt, the asteroid belt, and extrasolar debris disks may constrain the mass and number of large bodies stirring the cascade as well as the colliding bodies' internal strengths.
Surface Tension of Electrolyte Solutions: A Self-consistent Theory
Tomer Markovich; David Andelman; Rudi Podgornik
2014-04-09T23:59:59.000Z
We study the surface tension of electrolyte solutions at the air/water and oil/water interfaces. Employing field-theoretical methods and considering short-range interactions of anions with the surface, we expand the Helmholtz free energy to first-order in a loop expansion and calculate the excess surface tension. Our approach is self-consistent and yields an analytical prediction that reunites the Onsager-Samaras pioneering result (which does not agree with experimental data), with the ionic specificity of the Hofmeister series. We obtain analytically the surface-tension dependence on the ionic strength, ionic size and ion-surface interaction, and show consequently that the Onsager-Samaras result is consistent with the one-loop correction beyond the mean-field result. Our theory fits well a wide range of concentrations for different salts using one fit parameter, reproducing the reverse Hofmeister series for anions at the air/water and oil/water interfaces.10.1029
Parton distributions based on a maximally consistent dataset
Juan Rojo
2014-09-10T23:59:59.000Z
The choice of data that enters a global QCD analysis can have a substantial impact on the resulting parton distributions and their predictions for collider observables. One of the main reasons for this has to do with the possible presence of inconsistencies, either internal within an experiment or external between different experiments. In order to assess the robustness of the global fit, different definitions of a conservative PDF set, that is, a PDF set based on a maximally consistent dataset, have been introduced. However, these approaches are typically affected by theory biases in the selection of the dataset. In this contribution, after a brief overview of recent NNPDF developments, we propose a new, fully objective, definition of a conservative PDF set, based on the Bayesian reweighting approach. Using the new NNPDF3.0 framework, we produce various conservative sets, which turn out to be mutually in agreement within the respective PDF uncertainties, as well as with the global fit. We explore some of their implications for LHC phenomenology, finding also good consistency with the global fit result. These results provide a non-trivial validation test of the new NNPDF3.0 fitting methodology, and indicate that possible inconsistencies in the fitted dataset do not affect substantially the global fit PDFs.
Consistent generation of magnetic fields in axion inflation models
Tomohiro Fujita; Ryo Namba; Yuichiro Tada; Naoyuki Takeda; Hiroyuki Tashiro
2015-04-15T23:59:59.000Z
There has been a growing evidence for the existence of magnetic fields in the extra-galactic regions, while the attempt to associate their origin with the inflationary epoch alone has been found extremely challenging. We therefore take into account the consistent post-inflationary evolution of the magnetic fields that are originated from vacuum fluctuations during inflation. In the model of our interest, the electromagnetic (EM) field is coupled to a pseudo-scalar inflaton $\\phi$ through the characteristic term $\\phi F\\tilde F$, breaking the conformal invariance. This interaction dynamically breaks the parity and enables a continuous production of only one of the polarization states of the EM field through tachyonic instability. The produced magnetic fields are thus helical. We find that the dominant contribution to the observed magnetic fields in this model comes from the modes that leave the horizon near the end of inflation, further enhanced by the tachyonic instability right after the end of inflation. The EM field is subsequently amplified by parametric resonance during the period of inflaton oscillation. Once the thermal plasma is formed (reheating), the produced helical magnetic fields undergo a turbulent process called inverse cascade, which shifts their peak correlation scales from smaller to larger scales. We consistently take all these effects into account within the regime where the perturbation of $\\phi$ is negligible and obtain $B_{\\rm eff} \\sim 10^{-19}$G, indicating the necessity of additional mechanisms to accommodate the observations.
Self-consistent Green's functions with three-body forces
Arianna Carbone
2014-07-24T23:59:59.000Z
The present thesis aims at studying the properties of symmetric nuclear and pure neutron matter from a Green's functions point of view, including two-body and three-body chiral forces. An extended self-consistent Green's function formalism is defined to consistently incorporate three-body forces in the many-body calculations. The effect of three-nucleon interactions is included via the construction of a dressed two-body density dependent force. This is obtained performing an average of the leading order three-body terms in the chiral effective field theory expansion. The dressed force corresponds to the use of an in-medium propagator in the average which takes into account the correlations characterizing the system at each stage of the many-body calculation. The total energy of the system is obtained by means of a modified Galitskii-Migdal-Koltun sumrule to correctly account for the effect of three-body forces. Microscopic as well as macroscopic properties of symmetric nuclear and pure neutron matter are analyzed in detailed.
Towards a consistent description of in-medium parton branching
Apolinário, Liliana; Milhano, Guilherme; Salgado, Carlos A
2015-01-01T23:59:59.000Z
Ultra-relativistic heavy-ion collisions are a window of opportunity to study QCD matter under extreme conditions of temperature and density, such as the quark-gluon plasma. Among the several possibilities, the study of jet quenching - generic name given to in-medium energy loss modifications of the parton branching - is a powerful tool to assess the properties of this new state of matter. The description of the parton shower is very well understood in vacuum (controlled reference) and medium-induced modifications of this process can be experimentally accessed through jet measurements. Current experimental data, however, cannot be entirely described only with energy loss phenomena. Transverse momentum broadening and decoherence effects, both theoretically established by now, and their interplay are essential to build a consistent picture of the medium-modifications of the parton branching and to achieve a correct description of the current experimental data. In this write-up, we will present the latest develop...
Consistency of equations of motion in conformal frames
J. R. Morris
2014-11-05T23:59:59.000Z
Four dimensional scalar-tensor theory is considered within two conformal frames, the Jordan frame (JF) and the Einstein frame (EF). The actions for the theory are equivalent and equations of motion can be obtained from each action. It is found that the JF equations of motion, expressed in terms of EF variables, translate directly into and agree with the EF equations of motion obtained from the EF action, provided that certain simple consistency conditions are satisfied, which is always the case. The implication is that a solution set obtained in one conformal frame can be reliably translated into a solution set for the other frame, and therefore the two frames are, at least, mathematically equivalent.
First principles molecular dynamics without self-consistent field optimization
Souvatzis, Petros
2013-01-01T23:59:59.000Z
We present a first principles molecular dynamics approach that is based on time-reversible ex- tended Lagrangian Born-Oppenheimer molecular dynamics [Phys. Rev. Lett. 100, 123004 (2008)] in the limit of vanishing self-consistent field optimization. The optimization-free dynamics keeps the computational cost to a minimum and typically provides molecular trajectories that closely follow the exact Born-Oppenheimer potential energy surface. Only one single diagonalization and Hamiltonian (or Fockian) costruction are required in each integration time step. The proposed dy- namics is derived for a general free-energy potential surface valid at finite electronic temperatures within hybrid density functional theory. Even in the event of irregular functional behavior that may cause a dynamical instability, the optimization-free limit represents an ideal starting guess for force calculations that may require a more elaborate iterative electronic ground state optimization. Our optimization-free dynamics thus represents ...
Consistency condition for inflation from (broken) conformal symmetry
Schalm, Koenraad; Aalst, Ted van der [Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, Leiden (Netherlands); Shiu, Gary, E-mail: kschalm@lorentz.leidenuniv.nl, E-mail: shiu@physics.wisc.edu, E-mail: vdaalst@lorentz.leidenuniv.nl [Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 (United States)
2013-03-01T23:59:59.000Z
We investigate the symmetry constraints on the bispectrum, i.e. the three-point correlation function of primordial density fluctuations, in slow-roll inflation. It follows from the defining property of slow-roll inflation that primordial correlation functions inherit most of their structure from weakly broken de Sitter symmetries. Using holographic techniques borrowed from the AdS/CFT correspondence, the symmetry constraints on the bispectrum can be mapped to a set of stress-tensor Ward identities in a weakly broken 2+1-dimensional Euclidean CFT. We construct the consistency condition from these Ward identities using conformal perturbation theory. This requires a second order Ward identity and the use of the evolution equation. Our result also illustrates a subtle difference between conformal perturbation theory and the slow-roll expansion.
Consistent generation of magnetic fields in axion inflation models
Fujita, Tomohiro; Tada, Yuichiro; Takeda, Naoyuki; Tashiro, Hiroyuki
2015-01-01T23:59:59.000Z
There has been a growing evidence for the existence of magnetic fields in the extra-galactic regions, while the attempt to associate their origin with the inflationary epoch alone has been found extremely challenging. We therefore take into account the consistent post-inflationary evolution of the magnetic fields that are originated from vacuum fluctuations during inflation. In the model of our interest, the electromagnetic (EM) field is coupled to a pseudo-scalar inflaton $\\phi$ through the characteristic term $\\phi F\\tilde F$, breaking the conformal invariance. This interaction dynamically breaks the parity and enables a continuous production of only one of the polarization states of the EM field through tachyonic instability. The produced magnetic fields are thus helical. We find that the dominant contribution to the observed magnetic fields in this model comes from the modes that leave the horizon near the end of inflation, further enhanced by the tachyonic instability right after the end of inflation. Th...
Towards a consistent description of in-medium parton branching
Liliana Apolinário; Néstor Armesto; Guilherme Milhano; Carlos A. Salgado
2015-05-25T23:59:59.000Z
Ultra-relativistic heavy-ion collisions are a window of opportunity to study QCD matter under extreme conditions of temperature and density, such as the quark-gluon plasma. Among the several possibilities, the study of jet quenching - generic name given to in-medium energy loss modifications of the parton branching - is a powerful tool to assess the properties of this new state of matter. The description of the parton shower is very well understood in vacuum (controlled reference) and medium-induced modifications of this process can be experimentally accessed through jet measurements. Current experimental data, however, cannot be entirely described only with energy loss phenomena. Transverse momentum broadening and decoherence effects, both theoretically established by now, and their interplay are essential to build a consistent picture of the medium-modifications of the parton branching and to achieve a correct description of the current experimental data. In this write-up, we will present the latest developments that address such unified description.
Towards consistent Electroweak Precision Data constraints in the SMEFT
Laure Berthier; Michael Trott
2015-05-06T23:59:59.000Z
We discuss the impact of many previously neglected effects of higher dimensional operators when fitting to Electroweak Precision data (EWPD) in the Standard Model Effective Field Theory (SMEFT). We calculate the general case of $2 \\rightarrow 2$ fermion scattering in the SMEFT to order $\\mathcal{O}(\\bar{v}_T^2/\\Lambda^2)$ valid on and off the $Z$ pole, in the massless fermion limit. We demonstrate that previously neglected corrections scale as $\\Gamma_Z M_Z/\\bar{v}_T^2$ in the partial widths extracted from measured cross sections at LEPI, compared to the leading effect of dimension six operators in anomalous $Z$ couplings. Further, constraints on leading effects of anomalous $Z$ couplings are also modified by neglected perturbative corrections and dimension eight operators. We perform a minimal EWPD fit to illustrate the size of the error these corrections induce, when bounding leading effects. These considerations relax bounds compared to a naive leading order analysis, and show that constraints that rise above the percent level are subject to substantial theoretical uncertanties. We also argue that renormalization group running global constraints expressed through $\\chi^2$ functions to a common scale, and then minimizing and performing a global fit of all data allows more consistent constraints to be obtained in the SMEFT.
THE PRODUCT CONSISTENCY TEST HOW AND WHY IT WAS DEVELOPED
Jantzen, C; Ned Bibler, N
2008-12-15T23:59:59.000Z
The Product Consistency Test (PCT), American Society for Testing Materials (ASTM) Standard C1285, is currently used world wide for testing glass and glass-ceramic waste forms for high level waste (HLW), low level waste (LLW), and hazardous wastes. Development of the PCT was initiated in 1986 because HLW glass waste forms required extensive characterization before actual production began and required continued characterization during production ({ge}25 years). Non-radioactive startup was in 1994 and radioactive startup was in 1996. The PCT underwent extensive development from 1986-1994 and became an ASTM consensus standard in 1994. During the extensive laboratory testing and inter- and intra-laboratory round robins using non-radioactive and radioactive glasses, the PCT was shown to be very reproducible, to yield reliable results rapidly, to distinguish between glasses of different durability and homogeneity, and to easily be performed in shielded cell facilities with radioactive samples. In 1997, the scope was broadened to include hazardous and mixed (radioactive and hazardous) waste glasses. In 2002, the scope was broadened to include glass-ceramic waste forms which are currently being recommended for second generation nuclear wastes yet to be generated in the nuclear renaissance. Since the PCT has proven useful for glass-ceramics with up to 75% ceramic component and has been used to evaluate Pu ceramic waste forms, the use of this test for other ceramic/mineral waste forms such as geopolymers, hydroceramics, and fluidized bed steam reformer mineralized product is under investigation.
Multi-wavelength constraints on the inflationary consistency relation
Meerburg, P Daniel; Hadzhiyska, Boryana; Meyers, Joel
2015-01-01T23:59:59.000Z
We present the first attempt to use a combination of CMB, LIGO, and PPTA data to constrain both the tilt and the running of primordial tensor power spectrum through constraints on the gravitational wave energy density generated in the early universe. Combining measurements at different cosmological scales highlights how complementary data can be used to test the predictions of early universe models including the inflationary consistency relation. Current data prefers a slightly positive tilt ($n_t = 0.13^{+0.54}_{-0.75}$) and a negative running ($n_{t, {\\rm run}} < -0.25$) for the tensor power spectrum spectrum. Interestingly, the addition of direct gravitational wave detector data puts strong bounds on the tensor-to-scalar ratio $r < 0.2 $ since the large positive tensor tilt preferred by the Planck temperature power spectrum is no longer allowed. We comment on possible effects of a large positive tilt on the background expansion and show that depending on the assumptions regarding the UV cutoff ($k_{\\...
First principles molecular dynamics without self-consistent field optimization
Souvatzis, Petros, E-mail: petros.souvatsiz@fysik.uu.se [Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Box 516, SE-75120 Uppsala (Sweden)] [Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Box 516, SE-75120 Uppsala (Sweden); Niklasson, Anders M. N., E-mail: amn@lanl.gov [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2014-01-28T23:59:59.000Z
We present a first principles molecular dynamics approach that is based on time-reversible extended Lagrangian Born-Oppenheimer molecular dynamics [A. M. N. Niklasson, Phys. Rev. Lett. 100, 123004 (2008)] in the limit of vanishing self-consistent field optimization. The optimization-free dynamics keeps the computational cost to a minimum and typically provides molecular trajectories that closely follow the exact Born-Oppenheimer potential energy surface. Only one single diagonalization and Hamiltonian (or Fockian) construction are required in each integration time step. The proposed dynamics is derived for a general free-energy potential surface valid at finite electronic temperatures within hybrid density functional theory. Even in the event of irregular functional behavior that may cause a dynamical instability, the optimization-free limit represents a natural starting guess for force calculations that may require a more elaborate iterative electronic ground state optimization. Our optimization-free dynamics thus represents a flexible theoretical framework for a broad and general class of ab initio molecular dynamics simulations.
Consistency of the tachyon warm inflationary universe models
Zhang, Xiao-Min
2013-01-01T23:59:59.000Z
The consistency of the tachyon warm inflationary models is studied. We perform a linear stability analysis to give the slow-roll conditions characterized by the potential slow-roll (PSR) parameters for the existence of a tachyon warm inflationary attractor in the system. The PSR parameters in the tachyon warm inflationary models are new defined in our paper. The two cases of an exponential potential and an inverse power law potential are studied when the dissipative coefficient $\\Gamma=\\Gamma_0$ and $\\Gamma=\\Gamma(\\phi)$, respectively. A crucial condition for a workable tachyon warm inflationary model characterized by the Hubble slow-roll (HSR) parameter $\\epsilon_{_H}$ is obtained and extends to some other inflationary models. We can get a proper number of the e-folds in both cases of the tachyon warm inflation, contrary to some existing papers. We also point out that a constant dissipative coefficient $(\\Gamma=\\Gamma_0)$ is usually not a good assumption for a workable warm inflationary model.
Consistency of the tachyon warm inflationary universe models
Xiao-Min Zhang; Jian-Yang Zhu
2014-01-31T23:59:59.000Z
This study concerns the consistency of the tachyon warm inflationary models. A linear stability analysis is performed to find the slow-roll conditions, characterized by the potential slow-roll (PSR) parameters, for the existence of a tachyon warm inflationary attractor in the system. The PSR parameters in the tachyon warm inflationary models are redefined. Two cases, an exponential potential and an inverse power-law potential, are studied, when the dissipative coefficient $\\Gamma=\\Gamma_0$ and $\\Gamma=\\Gamma(\\phi)$, respectively. A crucial condition is obtained for a tachyon warm inflationary model characterized by the Hubble slow-roll (HSR) parameter $\\epsilon_{_H}$, and the condition is extendable to some other inflationary models as well. A proper number of e-folds is obtained in both cases of the tachyon warm inflation, in contrast to existing works. It is also found that a constant dissipative coefficient $(\\Gamma=\\Gamma_0)$ is usually not a suitable assumption for a warm inflationary model.
A Self-Consistent Hubbard U Density-Functional Theory Approach...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Self-Consistent Hubbard U Density-Functional Theory Approach to the Addition-Elimination Reactions of Hydrocarbons on Bare FeO A Self-Consistent Hubbard U Density-Functional Theory...
A Self-Consistent Method to Assess Air Quality Co-Benefits
A Self-Consistent Method to Assess Air Quality Co-Benefits from US Climate Policies Rebecca Saari;1 A Self-Consistent Method to Assess Air Quality Co-Benefits from US Climate Policies Rebecca Saari
DECOUPLED ENERGY STABLE SCHEMES FOR A PHASE-FIELD ...
2014-04-24T23:59:59.000Z
cally consistent phase-field model that admits an energy law. .... The momentum equation (macroscopic force balance) for the whole system takes the usual form ...
Design consistency and driver error as reflected by driver workload and accident rates
Wooldridge, Mark Douglas
1992-01-01T23:59:59.000Z
primary directions, speed consistency and driver workload. Speed consistency consists of analyzing predicted speeds on a highway and striving to keep those speeds within a narrow range. Several major research studies have provided methodologies... participating in the Texas Department of Transportation's Masters in Civil Engineering (MSCE) program, and performed the research that formed the basis for this report under the auspices of the Texas Transportation Institute. The data used as a basis...
Performance of hybrid quad generation system consisting of solid oxide fuel cell system and
Liso, Vincenzo
Performance of hybrid quad generation system consisting of solid oxide fuel cell system. Keywords: Energy system modeling, Solid oxide fuel cell, Absorption heat pump. 1. Introduction 1
A new hybrid architecture consisting of highly mesoporous CNT/carbon nanofibers from starch
Hong, Soon Hyung
A new hybrid architecture consisting of highly mesoporous CNT/carbon nanofibers from starch Yun the capacitance in electrochemical capacitors. This paper reports a new hybrid carbon nanofiber architecture successfully fabricated a new hybrid carbon architecture consisting of CNT reinforced-carbon nanofibers
Page 1 of 2 80.3 Consistent Treatment of Costs
Yang, Eui-Hyeok
Page 1 of 2 80.3 Consistent Treatment of Costs Policy Name: CONSISTENT TREATMENT OF COSTS October 2008 1. Policy Statement OMB Circular A21, Cost Principles for Educational Institutions, section J, contains a list of items that are deemed unallowable as direct costs on federally sponsored
Consistency, Availability, and Convergence Prince Mahajan, Lorenzo Alvisi, and Mike Dahlin
Dahlin, Michael D.
Consistency, Availability, and Convergence Prince Mahajan, Lorenzo Alvisi, and Mike Dahlin identify fundamental tradeoffs among properties of consistency, availability, and convergence, and we close the gap between what is known to be impossible (i.e. CAP) and known systems that are highly-available
Journal of Economic Theory 112 (2003) 353364 Time-consistent policies$
Karp, Larry S.
2003-01-01T23:59:59.000Z
restriction under which the time-consistent open-loop policy is stationary. We use examples to illustrate-loop policy rule, such as a linear income tax, is time consistent. This approach also identifies the (possibly [1,6]). A representative agent chooses a consumption trajectory cðtÞ in order to maximize the present
Self-tuning Speculation for Maintaining the Consistency of Client-Cached Data
Minnesota, University of
Consistency (AACC), in a page server DBMS architecture with page-level consistency. The simulation results. Keywords--self-tuning speculation; parallel comminication; concurrency control; data-shipping DBMS I. INTRODUCTION Client/server DBMS architectures fall into two main categories, query-shipping and data
Suppressing Multi-Channel Ultra-Low-Field MRI Measurement Noise Using Data Consistency and Image
Suppressing Multi-Channel Ultra-Low-Field MRI Measurement Noise Using Data Consistency and Image of Mathematics, National Taiwan University, Taipei, Taiwan, 4 Elekta Oy, Helsinki, Finland Abstract Ultra-low. (2013) Suppressing Multi-Channel Ultra-Low-Field MRI Measurement Noise Using Data Consistency and Image
Self-consistent solution of the Schwinger-Dyson equations for the nucleon and meson propagators
Bracco, M.E.; Eiras, A.; Krein, G. [Instituto de Fisica Teorica-Universidade Estadual Paulista, Rua Pamplona, 145-01405-900 Sao Paulo, Sao Paulo (Brazil)] [Instituto de Fisica Teorica-Universidade Estadual Paulista, Rua Pamplona, 145-01405-900 Sao Paulo, Sao Paulo (Brazil); Wilets, L. [Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States)] [Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States)
1994-03-01T23:59:59.000Z
The Schwinger-Dyson equations for the nucleon and meson propagators are solved self-consistently in an approximation that goes beyond the Hartree-Fock approximation. The traditional approach consists in solving the nucleon Schwinger-Dyson equation with bare meson propagators and bare meson-nucleon vertices; the corrections to the meson propagators are calculated using the bare nucleon propagator and bare nucleon-meson vertices. It is known that such an approximation scheme produces the appearance of ghost poles in the propagators. In this paper the coupled system of Schwinger-Dyson equations for the nucleon and the meson propagators are solved self-consistently including vertex corrections. The interplay of self-consistency and vertex corrections on the ghosts problem is investigated. It is found that the self-consistency does not affect significantly the spectral properties of the propagators. In particular, it does not affect the appearance of the ghost poles in the propagators.
Broader source: Energy.gov [DOE]
This webinar will focus on specific Building America projects that have examined methods to consistently meet high levels of energy performance in existing homes, with a focus on retrofit packages that can be replicated across many homes.
Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films
Osedach, Timothy P.
We demonstrate a near-infrared photodetector that consists of a thin film of the J-aggregating cyanine dye, U3, and transparent metal-oxide charge transport layers. The high absorption coefficient of the U3 film, combined ...
Muschietti, L; Lembege, B
2006-01-01T23:59:59.000Z
shock: a self-consistent PIC simulation L. Muschietti a andand run particle-in-cell (PIC) simulations of shocks withe?ectively two-dimensional. PIC simulations of perpendicular
Linear Consistency Testing Yonatan Aumann , Johan Hastad , Michael O. Rabin , and Madhu Sudan
Sudan, Madhu
and Rubinfeld [8] to check the linear- consistency of three functions f1, f2, f3 mapping a finite Abelian group G to an Abelian group H: Pick x, y G uniformly and independently at random and check if f1(x) + f2 the consistency of multiple func- tions. Given a triple of functions f1, f2, f3 : G H, we say
The relationship of parental consistency in discipline to locus of control in preschoolers
Schmidt, Corliss Theresa
1979-01-01T23:59:59.000Z
THE RELATIONSHIP OF PARENTAL CONSISTENCY IN DISCIPLINE TO LOCUS OF CONTROL IN PRESCHOOLERS A Thesis by CORLISS THERESA SCHMIDT Submitted to the Graduate College of Texas AIIM University in partial fulfillment of the requirement for the degree... of MASTER OF SCIEI'ICE August 1979 Major Subject: Psychology THE RELATIONSHIP OF PARENTAL CONSISTENCY IN DISCIPLINE TO LOCUS OF CONTROL IN PRESCHOOLERS A Thesis by CORLISS THERESA SCHMIDT Approved as to style and content by: ( a a of Committee...
Design consistency and driver error as reflected by driver workload and accident rates
Wooldridge, Mark Douglas
1992-01-01T23:59:59.000Z
DESIGN CONSISTENCY AND DRIVER ERROR AS REFLECTED BY DRIVER WORKLOAD AND ACCIDENT RATES A Thesis by MARK DOUGLAS WOOLDRIDGE Approved as to style and content by: Daniel B. Fambro (Chair of Committee) Raymond A. Krammes (Member) Olga J.... Pendleton (Member) James T. P. Yao (Head of Department) May 1992 ABSTRACT Design Consistency and Driver Error as Reflected by Driver Workload and Accident Rates (May 1992) Mark Douglas Wooldridge, B. S. , Texas A&M University Chair of Advisory...
Doubly self-consistent field theory of grafted polymers under simple shear in steady state
Suo, Tongchuan; Whitmore, Mark D., E-mail: mark-whitmore@umanitoba.ca [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada)
2014-03-21T23:59:59.000Z
We present a generalization of the numerical self-consistent mean-field theory of polymers to the case of grafted polymers under simple shear. The general theoretical framework is presented, and then applied to three different chain models: rods, Gaussian chains, and finitely extensible nonlinear elastic (FENE) chains. The approach is self-consistent at two levels. First, for any flow field, the polymer density profile and effective potential are calculated self-consistently in a manner similar to the usual self-consistent field theory of polymers, except that the calculation is inherently two-dimensional even for a laterally homogeneous system. Second, through the use of a modified Brinkman equation, the flow field and the polymer profile are made self-consistent with respect to each other. For all chain models, we find that reasonable levels of shear cause the chains to tilt, but it has very little effect on the overall thickness of the polymer layer, causing a small decrease for rods, and an increase of no more than a few percent for the Gaussian and FENE chains. Using the FENE model, we also probe the individual bond lengths, bond correlations, and bond angles along the chains, the effects of the shear on them, and the solvent and bonded stress profiles. We find that the approximations needed within the theory for the Brinkman equation affect the bonded stress, but none of the other quantities.
Attutude-action consistency and social policy related to nuclear technology
Lindell, M.K.; Perry, R.W.; Greene, M.
1980-06-01T23:59:59.000Z
This study reports the results of a further analysis of questionnaire data--parts of which have been previously reported by Lindell, Earle, Hebert and Perry (1978)--that are related to the issue of consistency of attitudes and behavior toward nuclear power and nuclear waste management. Three factors are considered that might be expected to have a significant bearing on attitude-action consistency: social support, attitude object importance and past activism. Analysis of the data indicated that pronuclear respondents were more likely to show consistency of attitudes and actions (66%) than were antinuclear respondents (51%) although the difference in proportions is not statistically significant. Further analyses showed a strong positive relation between attitude-action consistency and perceived social support, measured by the degree to which the respondent believed that close friends and work associated agreed with his attitude. This relationship held up even when controls for attitude object importance and past activism were introduced. Attitude object importance--the salience of the issue of energy shortage--had a statistically significant effect only when perceived social support was low. Past activism had no significant relation to attitude-action consistency. These data suggest that the level of active support for or opposition to nuclear technology will be affected by the distribution of favorable and unfavorable attitudes among residents of an area. Situations in which pro- and antinuclear attitudes are concentrated among members of interacting groups, rather than distributed randomly, are more likely to produce high levels of polarization.
The Complexity of the Consistency and N-representability Problems for Quantum States
Yi-Kai Liu
2007-12-18T23:59:59.000Z
QMA (Quantum Merlin-Arthur) is the quantum analogue of the class NP. There are a few QMA-complete problems, most notably the ``Local Hamiltonian'' problem introduced by Kitaev. In this dissertation we show some new QMA-complete problems. The first one is ``Consistency of Local Density Matrices'': given several density matrices describing different (constant-size) subsets of an n-qubit system, decide whether these are consistent with a single global state. This problem was first suggested by Aharonov. We show that it is QMA-complete, via an oracle reduction from Local Hamiltonian. This uses algorithms for convex optimization with a membership oracle, due to Yudin and Nemirovskii. Next we show that two problems from quantum chemistry, ``Fermionic Local Hamiltonian'' and ``N-representability,'' are QMA-complete. These problems arise in calculating the ground state energies of molecular systems. N-representability is a key component in recently developed numerical methods using the contracted Schrodinger equation. Although these problems have been studied since the 1960's, it is only recently that the theory of quantum computation has allowed us to properly characterize their complexity. Finally, we study some special cases of the Consistency problem, pertaining to 1-dimensional and ``stoquastic'' systems. We also give an alternative proof of a result due to Jaynes: whenever local density matrices are consistent, they are consistent with a Gibbs state.
Statistical dynamics of classical systems: A self-consistent field approach
Grzetic, Douglas J., E-mail: dgrzetic@uoguelph.ca; Wickham, Robert A., E-mail: rwickham@uoguelph.ca [Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1 (Canada); Shi, An-Chang, E-mail: shi@mcmaster.ca [Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1 (Canada)
2014-06-28T23:59:59.000Z
We develop a self-consistent field theory for particle dynamics by extremizing the functional integral representation of a microscopic Langevin equation with respect to the collective fields. Although our approach is general, here we formulate it in the context of polymer dynamics to highlight satisfying formal analogies with equilibrium self-consistent field theory. An exact treatment of the dynamics of a single chain in a mean force field emerges naturally via a functional Smoluchowski equation, while the time-dependent monomer density and mean force field are determined self-consistently. As a simple initial demonstration of the theory, leaving an application to polymer dynamics for future work, we examine the dynamics of trapped interacting Brownian particles. For binary particle mixtures, we observe the kinetics of phase separation.
On testing and extending the inflationary consistency relation for tensor modes
Latham Boyle; Kendrick M. Smith; Cora Dvorkin; Neil Turok
2015-08-05T23:59:59.000Z
If observations confirm BICEP2's claim of a tensor-scalar ratio $r\\approx 0.2$ on CMB scales, then the inflationary consistency relation $n_{t}=-r/8$ predicts a small negative value for the tensor spectral index $n_t$. We show that future CMB polarization experiments should be able to confirm this prediction at several sigma. We also show how to properly extend the consistency relation to solar system scales, where the primordial gravitational wave density $\\Omega_{gw}$ could be measured by proposed experiments such as the Big Bang Observer. This would provide a far more stringent test of the consistency relation and access much more detailed information about the early universe.
Temperature Fluctuation and an Expected Limit of Hubble Parameter in the Self-Consistent Model
A. B. Morcos
2004-12-08T23:59:59.000Z
The temperature gradient of microwave background radiation (CMBR) is calculated in the Self Consistent Model. An expected values for Hubble parameter have been presented in two different cases. In the first case the temperature is treated as a function of time only, while in the other one the temperature depends on relaxation of isotropy condition in the self-consistent model and the assumption that the universe expands adiabatically. The COBE's or WMAP's fluctuations in temperature of CMBR may be used to predict a value for Hubble parameter.
Self-Consistent RPA based on a Many-Body Vacuum
Mohsen Jemai; Peter Schuck
2010-11-23T23:59:59.000Z
Self-Consistent RPA is extended in a way so that it is compatable with a variational ansatz for the ground state wave function as a fermionic many-body vacuum. Employing the usual equation of motion technique, we arrive at extended RPA equations of the Self Consistent RPA structure. In principle the Pauli principle is, therefore, fully respected. However, the correlation functions entering the RPA matrix can only be obtained from a systematic expansion in powers of some combinations of RPA amplitudes. We demonstrate for a model case that this expansion may converge rapidly.
SM vacuum stability and the Weyl consistency conditions: Counting to three
Krog, Jens
2015-01-01T23:59:59.000Z
We demonstrate how a new perturbative ordering may result from the structure of the Weyl anomaly. Respecting the abelian nature of the Weyl anomaly at the lowest order enforces the use of beta functions calculated to a different loop order for different types of couplings. These consistency conditions are found to be satisfied by the renormalization group equations of the standard model, and we perform an analysis of the vacuum stability of the Higgs potential respecting the consistency conditions and compare to the previous results. Hints toward unknown structure in the standard model renormalization group equations are found, although the vacuum stability results are in agreement with previous estimates.
Self-consistent Green's functions calculation of the nucleon mean-free path
A. Rios; V. Soma
2011-12-22T23:59:59.000Z
The extension of Green's functions techniques to the complex energy plane provides access to fully dressed quasi-particle properties from a microscopic perspective. Using self-consistent ladder self-energies, we find both spectra and lifetimes of such quasi-particles in nuclear matter. With a consistent choice of the group velocity, the nucleon mean-free path can be computed. Our results indicate that, for energies above 50 MeV at densities close to saturation, a nucleon has a mean-free path of 4 to 5 femtometers.
A quick and efficient method for consistent initialization of battery models
Subramanian, Venkat
criterion on the other end that can ulti- mately satisfy all the required conditions in a battery unitA quick and efficient method for consistent initialization of battery models Vijayasekaran 2007 Available online 21 April 2007 Abstract Secondary batteries are usually modeled as a system
Nuclear Databases: National Resource Nuclear databases consists of carefully organized scientific
Ohta, Shigemi
Nuclear Databases: National Resource Nuclear databases consists of carefully organized scientific information that has been gathered over 50 years of low-energy nuclear physics research worldwide. These powerful databases have enormous value and they represent a genuine national resource. Six core nuclear
Consistency of the posterior distribution and MLE for piecewise linear regression
Paris-Sud XI, Université de
Consistency of the posterior distribution and MLE for piecewise linear regression Tristan Launay1 and that of the Bayes estimator for a two-phase piecewise linear regression mdoel where the break-point is unknown and be the unknown regression coefficient of the non-zero phase. The observations X1:n = (X1, . . . , Xn) depend
Hamming embedding and weak geometric consistency for large scale image search
Verbeek, Jakob
Hamming embedding and weak geometric consistency for large scale image search Herve Jegou, Matthijs improves recent methods for large scale image search. State-of-the-art methods build on the bag large datasets. Exper- iments performed on a dataset of one million of images show a signifi- cant
US Army Corps of Engineers
1 Mission Definition The temporary housing mission consists of the placement of manufactured housing units at individual home sites, existing mobile home parks or newly designed and constructed properties. The U.S. Army Corps of Engineers (USACE) Housing Planning Response Teams (PRT) may also be tasked
Krovi, Venkat
-645-3875). showed that humans, and by extension all animals, maintain resonance during walking and running [1, 2Abstract-- Researchers have hypothesized that animal locomotory patterns seen are consistent employed virtual prototyping with a capable musculoskeletal simulation model to study the same hypothesis
Hammes-Schiffer, Sharon
Fourier grid Hamiltonian multiconfigurational self-consistent-field: A method to calculate Received 10 May 2000; accepted 28 June 2000 The Fourier Grid Hamiltonian Multiconfigurational Self that are products of one-dimensional wavefunctions, with a Fourier grid method that represents the one
to 150 GPa, consistent with the modulus values of large SWNT bundles (22). Al-
Cottet, Audrey
to 150 GPa, consistent with the modulus values of large SWNT bundles (22). Al- though an individual to provide the optimum conditions for nanotube strand formation. The gas flow carried the strands down), assuming that the sample volume is constant, where D0 and Df are the original diameter and the real
A Quasi Lower Bound on the Consistency Strength Sy-David Friedman, Peter Holy
, Local Club Condensation, Acceptability, Large Cardinals. The authors wish to thank the Austrian Research Condensation be acceptable: Theorem 2 Local Club Condensation and Acceptability are simultaneously consistent containing very large cardinals. The main technical result needed is the compatibility of Local Club
Self-consistent analysis of the hot spot dynamics for inertial confinement fusion capsules
Garnier, Josselin
Self-consistent analysis of the hot spot dynamics for inertial confinement fusion capsules J. Sanz Hydrodynamic stability of inertial confinement fusion ICF capsules during the deceleration stage has been re October 2005; published online 11 November 2005 In the context of the French Laser-Mégajoule fusion
A CONSISTENT MODELLING METHODOLOGY FOR SECONDARY1 SETTLING TANKS: A RELIABLE NUMERICAL METHOD2
Bürger, Raimund
relations for hindered settling, compression and dispersion can be used within the model, allowing the user, continuous sedimentation, secondary clarifier, simulation5 model, partial differential equation6 NomenclatureA CONSISTENT MODELLING METHODOLOGY FOR SECONDARY1 SETTLING TANKS: A RELIABLE NUMERICAL METHOD2
A consistent modelling methodology for secondary settling tanks: a reliable numerical method
Bürger, Raimund
accounting for sediment compressibility, and a dispersion term for turbulence. In addition, the solutionA consistent modelling methodology for secondary settling tanks: a reliable numerical method modelling methodology for secondary settling tanks (SSTs) leads to a partial differential equation (PDE
CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set of
Zhao, Yuxiao
CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set to the variables in a way so that all constraints are (simultaneously) satisfied. The general CSP is NP-complete. However, when the CSP is restricted to a fixed constraint language (a set of allowed constraint
(Smart) Look-Ahead Arc Consistency and the Pursuit of CSP Tractability
Dalmau, Victor
(Smart) Look-Ahead Arc Consistency and the Pursuit of CSP Tractability Hubie Chen 1 and V#19. The constraint satisfaction problem (CSP) can be formu- lated as the problem of deciding, given a pair (A; B) of relational struc- tures, whether or not there is a homomorphism from A to B. Although the CSP is in general
Mackworth, Alan K.
-binary classic con- straint satisfaction problems (CSPs). Based on the Semiring CSP and Valued CSP frameworks CSP, probabilistic CSP, max CSP, and weighted CSP. This extension is based on an idempotent satisfaction problem (CSP), local consistency can be characterized as deriving new constraints based on local
Changing System Interfaces Consistently: a New Refinement Strategy for CSP B
Doran, Simon J.
Changing System Interfaces Consistently: a New Refinement Strategy for CSP B Steve Schneider refinement in the context of CSP B. Our motivation to include this notion of refinement within the CSP B to change the events of a CSP process and the B machines when refining a system. Notions of refinement based
Improving Mobile Database Access Over Wide-Area Networks Without Degrading Consistency
Satyanarayanan, Mahadev "Satya"
degrading consistency. Cedar exploits the disk storage and processing power of a mobile client to compensate to reduce data transmission volume from a data- base server. The reduction is achieved by using content Management]: Systems General Terms Design, Performance Keywords mobile database access, wireless networks
A more consistent method for extracting and amplifying DNA from bee wings
A more consistent method for extracting and amplifying DNA from bee wings Elaine M. GOULD, Michelle for genotyping certain behavioural traits required for breeding. One method is to use wing clippings. However reaction (PCR) amplification. Here, we describe an improved method for extracting DNA from bee wings using
The Definition of Double Commutators and Consistency in Free Field Theory
J. M. Pawlowski
1996-10-09T23:59:59.000Z
Within the framework of generalized functions a general consistent definition of double commutators is given. This definition respects the Jacobi identity even if the regularization is removed. The double commutator of fermionic currents is calculated in this limit. We show that BJL--type prescriptions and point--splitting prescriptions for calculating double commutators fail to give correct results in free field theory.
On a time consistency concept in risk averse multi-stage stochastic ...
2008-12-11T23:59:59.000Z
That is, our decisions should be a function of the history of the data process available at the time ... ering the case with finite number of scenarios will allow us to avoid some technical complications ..... (as well as (3.8)) is not time consistent.
Marks of Excellence Accounting students at MSU's College of Business consistently have one
Dyer, Bill
Marks of Excellence · Accounting students at MSU's College of Business consistently have one of the highest CPA pass rates in the nation, according to the National Association of State Boards of Accountancy. · The success of MSU accounting students has attracted recruiters' attention. Each of the top public accounting
The CRAC channel consists of a tetramer formed by Stim-induced dimerization of Orai dimers
Parker, Ian
LETTERS The CRAC channel consists of a tetramer formed by Stim-induced dimerization of Orai dimers terminus of Stim thus induces Orai dimers to dimerize, forming tetramers that constitute the Ca21-treated cells14 , whereas functional measurements of expressed tandem Orai multimers indicate a tetramer
Hydrological consistency using multi-sensor remote sensing data for water and energy cycle studies
Pan, Ming
Hydrological consistency using multi-sensor remote sensing data for water and energy cycle studies-sensor/multi-platform approach to water and energy cycle prediction is demonstrated in an effort to understand the variability to an improved understanding of water and energy cycles within the NAME region and providing a novel framework
Hierarchy of consistent n-component Cahn-Hilliard systems Franck Boyer
Boyer, Edmond
elsewhere. (1.2) 1 hal-00933674,version1-20Jan2014 #12;2 F. Boyer, S. Minjeaud Those assumptions implyHierarchy of consistent n-component Cahn-Hilliard systems Franck Boyer Aix Marseille Universit´e, CNRS, Centrale Marseille, I2M, UMR 7373, 13453 Marseille, France franck.boyer@univ-amu.fr Sebastian
Geophysically consistent values of the perovskite to post-perovskite transition Clapeyron slope
Geophysically consistent values of the perovskite to post-perovskite transition Clapeyron slope J February 2007; published 15 March 2007. [1] The double-crossing hypothesis posits that post- perovskite in Earth's deep mantle and the temperature of Earth's inner core boundary, we show that a post-perovskite
, physics, and environmental science, and supporting fields such as biology and chemistry. The EEPS programMaster of Science in Earth, Environmental, and Physical Sciences Planet Earth consists activities. The Masters program in Earth, Environmental, and Physical Sciences (EEPS) at Wichita State
Florida, University of
Phytoplankton consists of one-celled marine and freshwater microalgae and other plant, taking up carbon dioxide and nutrients from the water and using light as an energy source. The microalgae microalgae species (Hoff and Snell, 2008). Species Temperature (°C) Light (Lux) Salinity (ppt ) Chaetoceros
Baum, Bryan A.
Relationship between ice water content and equivalent radar reflectivity for clouds consisting investigates the relationship between ice water content (IWC) and equivalent radar reflectivity (Ze) at 94 GHz. Baum, and A. J. Heymsfield (2008), Relationship between ice water content and equivalent radar
New Loops! MiTeGen* 50MicroMountsTM consist of a thin microfabricated
Meagher, Mary
New Loops! MiTeGen* 50µMicroMountsTM consist of a thin microfabricated polyimide film attached to a solid non-magnetic stainless steel pin. The film is polyimide, which is used in Kapton® tape and is employed for X- ray transparent windows on X-ray beam lines. The film is curved by wrapping polyimide film
Linear-scaling implementation of molecular electronic self-consistent field theory
Helgaker, Trygve
Linear-scaling implementation of molecular electronic self-consistent field theory Pawel Salek fitting of the electron density , LS-TRRH and TRDSM methods constitute the linear-scaling trust-region SCF; accepted 9 January 2007; published online 21 March 2007 A linear-scaling implementation of Hartree
A proposal for a UPC memory consistency model, v1.0
Yelick, Katherine; Bonachea, Dan; Wallace, Charles
2004-05-05T23:59:59.000Z
The memory consistency model in a language defines the order in which the results of write operations maybe observed through read operations. The behavior of a UPC program may depend on the timing of accesses to shared variables, so a program defines a set of possible executions, rather than a single execution. The memory consistency model constrains the set of possible executions for a given program; the user may then rely on properties that are true of all of those executions. The memory consistency model is defined in terms of the read and write operations issued by each thread in naive translation of the code, i.e., without any code transformations by the compiler, with each thread issuing operations as defined by the abstract machine defined in ISO C 5.1.2.3. A UPC compiler or run time system may perform various code transformations to improve performance, so long as they are not visible to the programmer - i.e., provided the set of externally-visible behaviors (the input/output dynamics and volatile behavior defined in ISO C 5.1.2.3) from any execution of the transformed program are identical to those of the original program executing on the abstract machine and adhering to the consistency model defined in this document.
Caelus: Verifying the Consistency of Cloud Services with Battery-Powered Devices
Lie, David
Caelus: Verifying the Consistency of Cloud Services with Battery-Powered Devices Beom Heyn Kim of Toronto Abstract-- Cloud storage services such as Amazon S3, DropBox, Google Drive and Microsoft One stored in the cloud all have shortcomings when used on battery-powered devices they either require
A self-consistent solution in affine space with scalar field
V. Dorofeev
2006-03-29T23:59:59.000Z
Conformal connection of scalar field is shown to produce possible non-metricity in affine connection spaces. In case of self-consistent solution the non-metricity is a correction to background Riemannian structure with respect to gravitational constant and its magnitude may be essential in the early Universe.
Self-consistency tests of large-scale dynamics parameterizations for single-column modeling
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Edman, Jacob P.; Romps, David M.
2015-03-01T23:59:59.000Z
Large-scale dynamics parameterizations are tested numerically in cloud-resolving simulations, including a new version of the weak-pressure-gradient approximation (WPG) introduced by Edman and Romps (2014), the weak-temperature-gradient approximation (WTG), and a prior implementation of WPG. We perform a series of self-consistency tests with each large-scale dynamics parameterization, in which we compare the result of a cloud-resolving simulation coupled to WTG or WPG with an otherwise identical simulation with prescribed large-scale convergence. In self-consistency tests based on radiative-convective equilibrium (RCE; i.e., no large-scale convergence), we find that simulations either weakly coupled or strongly coupled to either WPG or WTG are self-consistent, butmore »WPG-coupled simulations exhibit a nonmonotonic behavior as the strength of the coupling to WPG is varied. We also perform self-consistency tests based on observed forcings from two observational campaigns: the Tropical Warm Pool International Cloud Experiment (TWP-ICE) and the ARM Southern Great Plains (SGP) Summer 1995 IOP. In these tests, we show that the new version of WPG improves upon prior versions of WPG by eliminating a potentially troublesome gravity-wave resonance.« less
SU-E-J-29: Audiovisual Biofeedback Improves Tumor Motion Consistency for Lung Cancer Patients
Lee, D; Pollock, S; Makhija, K; Keall, P [The University of Sydney, Camperdown, NSW (Australia); Greer, P [The University of Newcastle, Newcastle, NSW (Australia); Calvary Mater Newcastle Hospital, Newcastle, NSW (Australia); Arm, J; Hunter, P [Calvary Mater Newcastle Hospital, Newcastle, NSW (Australia); Kim, T [The University of Sydney, Camperdown, NSW (Australia); University of Virginia Health System, Charlottesville, VA (United States)
2014-06-01T23:59:59.000Z
Purpose: To investigate whether the breathing-guidance system: audiovisual (AV) biofeedback improves tumor motion consistency for lung cancer patients. This will minimize respiratory-induced tumor motion variations across cancer imaging and radiotherapy procedues. This is the first study to investigate the impact of respiratory guidance on tumor motion. Methods: Tumor motion consistency was investigated with five lung cancer patients (age: 55 to 64), who underwent a training session to get familiarized with AV biofeedback, followed by two MRI sessions across different dates (pre and mid treatment). During the training session in a CT room, two patient specific breathing patterns were obtained before (Breathing-Pattern-1) and after (Breathing-Pattern-2) training with AV biofeedback. In each MRI session, four MRI scans were performed to obtain 2D coronal and sagittal image datasets in free breathing (FB), and with AV biofeedback utilizing Breathing-Pattern-2. Image pixel values of 2D images after the normalization of 2D images per dataset and Gaussian filter per image were used to extract tumor motion using image pixel values. The tumor motion consistency of the superior-inferior (SI) direction was evaluated in terms of an average tumor motion range and period. Results: Audiovisual biofeedback improved tumor motion consistency by 60% (p value = 0.019) from 1.0±0.6 mm (FB) to 0.4±0.4 mm (AV) in SI motion range, and by 86% (p value < 0.001) from 0.7±0.6 s (FB) to 0.1±0.2 s (AV) in period. Conclusion: This study demonstrated that audiovisual biofeedback improves both breathing pattern and tumor motion consistency for lung cancer patients. These results suggest that AV biofeedback has the potential for facilitating reproducible tumor motion towards achieving more accurate medical imaging and radiation therapy procedures.
Self-consistent quasiparticle model for 2, 3, and (2+1) flavor QGP
Bannur, Vishnu M. [Department of Physics, University of Calicut, Kerala-673 635 (India)
2008-10-15T23:59:59.000Z
The quasiparticle model of quark gluon plasma is the statistical mechanics of noninteracting particles with medium dependent mass related to plasma frequency, which is proposed to describe the thermodynamics of the medium itself. At the relativistic limit, the plasma frequency depends on the number density and temperature. The number density is a thermodynamic quantity of the medium which in turn depends on plasma frequency. Hence, one needs to solve this problem self-consistently instead of using perturbative expressions for plasma frequency. Here we carry out such self-consistent calculations using our recently developed new formulations of the quasiparticle model. By adjusting a single parameter for each system, a remarkably good fit to results of lattice simulation of quantum chromodynamics is obtained for 2, 3, and (2+1) flavor quark gluon plasma systems, first, with zero chemical potential. Then, it is extended to systems with finite chemical potential and fits very well to the lattice results without any new parameter.
Consistent Modified Gravity Analysis of Anisotropic Galaxy Clustering Using BOSS DR11
Song, Yong-Seon; Linder, Eric; Koyama, Kazuya; Sabiu, Cristiano G; Zhao, Gong-Bo; Bernardeau, Francis; Nishimichi, Takahiro; Okumura, Teppei
2015-01-01T23:59:59.000Z
We analyse the clustering of cosmic large scale structure using a consistent modified gravity perturbation theory, accounting for anisotropic effects along and transverse to the line of sight. The growth factor has a particular scale dependence in f(R) gravity and we fit for the shape parameter f_{R0} simultaneously with the distance and the large scale (general relativity) limit of the growth function. Using more than 690,000 galaxies in the Baryon Oscillation Spectroscopy Survey Data Release 11, we find no evidence for extra scale dependence, with the 95\\% confidence upper limit |f_{R0}| <8 \\times 10^{-4}. Future clustering data, such as from the Dark Energy Spectroscopic Instrument, can use this consistent methodology to impose tighter constraints.
Nonparametric test of consistency between cosmological models and multiband CMB measurements
Aghamousa, Amir
2015-01-01T23:59:59.000Z
We present a novel approach to test the consistency of the cosmological models with multiband CMB data using a nonparametric approach. In our analysis we calibrate the REACT (Risk Estimation and Adaptation after Coordinate Transformation) confidence levels associated with distances in function space (confidence distances) based on the Monte Carlo simulations in order to test the consistency of an assumed cosmological model with observation. To show the applicability of our algorithm, we confront Planck 2013 temperature data with concordance model of cosmology considering two different Planck spectra combination. In order to have an accurate quantitative statistical measure to compare between the data and the theoretical expectations, we calibrate REACT confidence distances and perform a bias control using many realizations of the data. Our results in this work using Planck 2013 temperature data put the best fit $\\Lambda$CDM model at $95\\% (\\sim 2\\sigma)$ confidence distance from the center of the nonparametri...
Self-Consistent Model of Roton Cluster Excitations in Liquid Helium II
V. I. Kruglov; M. J. Collett
2006-05-18T23:59:59.000Z
We have proposed a model of roton cluster excitations in liquid helium~II based on a Schr\\"odinger-type equation with a self-consistent confining potential. We have derived an equation for the number of atoms in roton excitations, which can be treated as quantum $3{\\rm D}$ solitons, depending on vibrational quantum numbers. It is shown that the smallest roton cluster is in the symmetric vibrational quantum state and consists of 13 helium atoms. We have also used a modified Born approximation to calculate the $s$-scattering length for helium atoms. This allows us to calculate all parameters of Landau's roton excitation spectrum, in agreement to high accuracy with experimental measurements from neutron scattering.
Bannur, Vishnu M. [Department of Physics, University of Calicut, Kerala-673 635 (India)
2006-06-15T23:59:59.000Z
Relativistic plasma with two charge species and radiation at thermodynamic equilibrium is a general system of interest in astrophysics and high-energy physics. We develop a self-consistent quasiparticle model for such a system to take account of the collective behavior of plasma, and thermodynamic properties are derived. It is applied to the ultrarelativistic electron-positron plasma and compared with previous results.
M. R. Setare; Mubasher Jamil
2010-08-27T23:59:59.000Z
Recently one of us derived the action of modified gravity consistent with the holographic and new-agegraphic dark energy. In this paper, we investigate the stability of the Lagrangians of the modified gravity as discussed in [M. R. Setare, Int. J. Mod. Phys. D 17 (2008) 2219; M. R. Setare, Astrophys. Space Sci. 326 (2010) 27]. We also calculate the statefinder parameters which classify our dark energy model.
New wind input term consistent with experimental, theoretical and numerical considerations
V. E. Zakharov; D. Resio; A. Pushkarev
2012-12-05T23:59:59.000Z
We offer a new method for determining the wind source term for energy and momentum fluxes transfer from the atmosphere to the wind-driven sea. This new source-term formulation is based on extensive analysis of experimental data collected at different sites around the world. It is shown that this new wind source term to be consistent both with numerical solution of exact equation for resonant four-wave interactions and available experimental data.
Consistency of lattice definitions of U(1) flux in Abelian projected SU(2) gauge theory
Takayuki Matsuki; Richard W. Haymaker
2003-10-07T23:59:59.000Z
We reexamine the dual Abrikosov vortex under the requirement that the lattice averages of the fields satisfy exact Maxwell equations [ME]. The electric ME accounts for the total flux and the magnetic ME determines the shape of the confining string. This leads to unique and consistent definitions of flux and electric and magnetic currents at finite lattice spacing. The resulting modification of the standard DeGrand-Toussaint construction gives a magnetic current comprised of smeared monopoles.
Third minima in thorium and uranium isotopes in a self-consistent theory
J. D. McDonnell; W. Nazarewicz; J. A. Sheikh
2013-05-23T23:59:59.000Z
Background: Deep third minima have been predicted in some non-self-consistent models to impact fission pathways of thorium and uranium isotopes. These predictions have guided the interpretation of resonances seen experimentally. On the other hand, self-consistent calculations consistently predict very shallow potential-energy surfaces in the third minimum region. Purpose: We investigate the interpretation of third-minimum configurations in terms of dimolecular states. We study the isentropic potential-energy surfaces of selected even-even thorium and uranium isotopes at several excitation energies. In order to understand the driving effects behind the presence of third minima, we study the interplay between pairing and shell effects. Methods: We use the finite-temperature superfluid nuclear density functional theory. We consider a traditional functional, SkM*, and a recent functional, UNEDF1, optimized for fission studies. Results: We predict very shallow or no third minima in the potential-energy surfaces of 232Th and 232U. In Th and U isotopes with N=136 and 138, the third minima are deeper. We show that the reflection-asymmetric configurations around the third minimum can be associated with dimolecular states involving the spherical doubly magic 132Sn and a lighter deformed Zr or Mo fragment. The potential-energy surfaces for 228,232Th and 232U at several excitation energies are presented. Conclusions: We show that the neutron shell effect that governs the existence of the dimolecular states around the third minimum is consistent with the spherical-to-deformed shape transition in the Zr and Mo isotopes around N=58. We demonstrate that the thermal reduction of pairing and enhancement of shell effects at small excitation energies help to develop deeper third minima. At large excitation energies, shell effects are washed out and third minima disappear altogether.
Examining the consistency relations describing the three-point functions involving tensors
Sreenath, V.; Sriramkumar, L., E-mail: sreenath@physics.iitm.ac.in, E-mail: sriram@physics.iitm.ac.in [Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India)
2014-10-01T23:59:59.000Z
It is well known that the non-Gaussianity parameter f{sub NL} characterizing the scalar bi-spectrum can be expressed in terms of the scalar spectral index in the squeezed limit, a property that is referred to as the consistency relation. In contrast to the scalar bi-spectrum, the three-point cross-correlations involving scalars and tensors and the tensor bi-spectrum have not received adequate attention, which can be largely attributed to the fact that the tensors had remained undetected at the level of the power spectrum until very recently. The detection of the imprints of the primordial tensor perturbations by BICEP2 and its indication of a rather high tensor-to-scalar ratio, if confirmed, can open up a new window for understanding the tensor perturbations, not only at the level of the power spectrum, but also in the realm of non-Gaussianities. In this work, we consider the consistency relations associated with the three-point cross-correlations involving scalars and tensors as well as the tensor bi-spectrum in inflationary models driven by a single, canonical, scalar field. Characterizing the cross-correlations in terms of the dimensionless non-Gaussianity parameters C{sub NL}{sup R} and C{sub NL}{sup ?} that we had introduced earlier, we express the consistency relations governing the cross-correlations as relations between these non-Gaussianity parameters and the scalar or tensor spectral indices, in a fashion similar to that of the purely scalar case. We also discuss the corresponding relation for the non-Gaussianity parameter h{sub NL} used to describe the tensor bi-spectrum. We analytically establish these consistency relations explicitly in the following two situations: a simple example involving a specific case of power law inflation and a non-trivial scenario in the so-called Starobinsky model that is governed by a linear potential with a sharp change in its slope. We also numerically verify the consistency relations in three types of inflationary models that permit deviations from slow roll and lead to scalar power spectra with features which typically result in an improved fit to the data than the more conventional, nearly scale invariant, spectra. We close with a summary of the results we have obtained.
Cuniberti, Gianaurelio
an analytical theory for this case. This theory is based on the self-consistent Born approximation SCBA , which
Tsventoukh, M. M. [Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
2010-10-15T23:59:59.000Z
A study is made of the convective (interchange, or flute) plasma stability consistent with equilibrium in magnetic confinement systems with a magnetic field decreasing outward and large curvature of magnetic field lines. Algorithms are developed which calculate convective plasma stability from the Kruskal-Oberman kinetic criterion and in which the convective stability is iteratively consistent with MHD equilibrium for a given pressure and a given type of anisotropy in actual magnetic geometry. Vacuum and equilibrium convectively stable configurations in systems with a decreasing, highly curved magnetic field are calculated. It is shown that, in convectively stable equilibrium, the possibility of achieving high plasma pressures in the central region is restricted either by the expansion of the separatrix (when there are large regions of a weak magnetic field) or by the filamentation of the gradient plasma current (when there are small regions of a weak magnetic field, in which case the pressure drops mainly near the separatrix). It is found that, from the standpoint of equilibrium and of the onset of nonpotential ballooning modes, a kinetic description of convective stability yields better plasma confinement parameters in systems with a decreasing, highly curved magnetic field than a simpler MHD model and makes it possible to substantially improve the confinement parameters for a given type of anisotropy. For the Magnetor experimental compact device, the maximum central pressure consistent with equilibrium and stability is calculated to be as high as {beta} {approx} 30%. It is shown that, for the anisotropy of the distribution function that is typical of a background ECR plasma, the limiting pressure gradient is about two times steeper than that for an isotropic plasma. From a practical point of view, the possibility is demonstrated of achieving better confinement parameters of a hot collisionless plasma in systems with a decreasing, highly curved magnetic field than those obtained with the simplest MHD description.
Quantal self-consistent cranking model for monopole excitations in even-even light nuclei
P. Gulshani
2014-10-24T23:59:59.000Z
In this article, we derive a quantal self-consistent time-reversal invariant parameter-free cranking model for isoscalar monopole excitation coupled to intrinsic motion in even-even light nuclei. The model uses a wavefunction that is a product of monopole and intrinsic wavefunctions and a constrained variational method to derive, from a many-particle Schrodinger equation, a pair of coupled self-consistent cranking-type Schrodinger equations for the monopole and intrinsic systems. The monopole co-ordinate used is the trace of the quadrupole tensor and hence describes the overall deformation of the nucleus. The monopole and intrinsic wavefunctions are coupled to each other by the two cranking equations and their associated parameters and by two constraints imposed on the intrinsic system. For an isotropic Nilsson shell model and an effective residual two-body interaction, the two coupled cranking equations are solved in the Tamm Dancoff approximation. The strength of the interaction is determined from a Hartree-Fock self-consistency argument. The excitation energy of the first excited state is determined and found to agree closely with those observed in the nuclei He-4, Be-8, C-12, O-16 , Ne-20, Mg-24, and Si-28. The variation of the model parameters are explained. In particular, it is found that the monopole excitation energy as a function of the mass number undergoes an increase whenever the nucleons begin to occupy a new sub-shell state with non-zero orbital angular momentum as a consequence of suppressing or constraining the resulting spurious monopole excitation in the intrinsic system.
Testing the Self-Consistency of MOND With Three-Dimensional Galaxy Kinematics
Christopher W. Stubbs; Arti Garg
2005-12-02T23:59:59.000Z
We propose a technique to test the idea that non-standard dynamics, rather than dark matter halos, might be responsible for the observed rotation curves of spiral galaxies. In the absence of non-luminous matter, a galactic disk's rotational velocity and its vertical velocity dispersion can be used jointly to test the self-consistency of the galaxy's dynamics. A specific illustrative example, using recent measurements of the disk kinematics of M33, shows this to be a promising approach to assess the viability of Modified Newtonian Dynamics (MOND).
On the self-consistence of electrodynamics in the early universe
R. Klippert; V. A. De Lorenci; M. Novello; J. M. Salim
2002-03-27T23:59:59.000Z
The issue of a self-consistent solution of Maxwell-Einstein equations achieves a very simple form when all quantum effects are neglected but a weak vacuum polarization due to an external magnetic field is taken into account. From a semi-classical point of view this means to deal with an appropriate limit of the one-loop effective Lagrangian for electrodynamics. When the corresponding stress-energy tensor is considered as a source of the gravitational field a surprisingly bouncing behavior is obtained. The present toy model leads to important new features which should have taken place in the early universe.
Comment on: "On the consistency of solutions of the space fractional Schrödinger equation"
E. Hawkins; J. M. Schwarz
2012-10-04T23:59:59.000Z
In [J. Math. Phys. 53, 042105 (2012)], Bay{\\i}n claims to prove the consistency of the purported piece-wise solutions to the fractional Schr\\"odinger equation for an infinite square well. However, his calculation uses standard contour integral techniques despite the absence of an analytic integrand. The correct calculation is presented and supports our earlier work proving that the purported piece-wise solutions do not solve the fractional Schr\\"odinger equation for an infinite square well [M. Jeng, S.-L.-Y. Xu, E. Hawkins, and J. M. Schwarz, J. Math. Phys. 51, 062102 (2010)].
M. L. Martin-Manjon; M. Molla; A. I. Diaz; R. Terlevich
2008-10-13T23:59:59.000Z
We have computed a series of realistic and self-consistent models that reproduce the properties of HII galaxies. The emitted spectrum of HII galaxies is reproduced by means of the photoionization code CLOUDY, using as ionizing spectrum the spectral energy distribution of the modelled HII galaxy, calculated using new and updated stellar population synthesis model (PopStar, Molla et al. 08) This, in turn, is calculated according to a star formation history and a metallicity evolution given by a chemical evolution code. Our technique reproduces observed abundances, diagnostic diagrams, colours and equivalent width vs. colour relations for local HII galaxies
Self-consistent Green's function calculation of 16O at small missing energies
C. Barbieri; W. H. Dickhoff
2004-10-19T23:59:59.000Z
Calculations of the one-hole spectral function of 16O for small missing energies are reviewed. The self-consistent Green's function approach is employed together with the Faddeev equations technique in order to study the coupling of both particle-particle and particle-hole phonons to the single-particle motion. The results indicate that the characteristics of hole fragmentation are related to the low-lying states of 16O and an improvement of the description of this spectrum, beyond the random phase approximation, is required to understand the experimental strength distribution. A first calculation in this direction that accounts for two-phonon states is discussed.
BILIWG: Consistent "Figures of Merit" (Presentation) | Department of Energy
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
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Third Minima in Thorium and Uranium Isotopes in a Self-Consistent Theory
McDonnell, J. D. [UTK/ORNL/LLNL; Nazarewicz, Witold [UTK/ORNL/University of Warsaw; Sheikh, J. A. [UTK/ORNL/University of Kashmir, India
2013-01-01T23:59:59.000Z
Background: Well-developed third minima, corresponding to strongly elongated and reflection-asymmetric shapes associated with dimolecular configurations, have been predicted in some non-self-consistent models to impact fission pathways of thorium and uranium isotopes. These predictions have guided the interpretation of resonances seen experimentally. On the other hand, self-consistent calculations consistently predict very shallow potential-energy surfaces in the third minimum region.
Purpose: We investigate the interpretation of third-minimum configurations in terms of dimolecular (cluster) states. We study the isentropic potential-energy surfaces of selected even-even thorium and uranium isotopes at several excitation energies. In order to understand the driving effects behind the presence of third minima, we study the interplay between pairing and shell effects.
Methods: We use the finite-temperature superfluid nuclear density functional theory. We consider two Skyrme energy density functionals: a traditional functional SkM and a recent functional UNEDF1 optimized for fission studies.
Results: We predict very shallow or no third minima in the potential-energy surfaces of 232Th and 232U. In the lighter Th and U isotopes with N = 136 and 138, the third minima are better developed. We show that the reflection-asymmetric configurations around the third minimum can be associated with dimolecular states involving the spherical doubly magic 132Sn and a lighter deformed Zr or Mo fragment. The potential-energy surfaces for 228,232Th and 232U at several excitation energies are presented. We also study isotopic chains to demonstrate the evolution of the depth of the third minimum with neutron number.
Conclusions: We show that the neutron shell effect that governs the existence of the dimolecular states around the third minimum is consistent with the spherical-to-deformed shape transition in the Zr andMo isotopes around N = 58.We demonstrate that the depth of the third minimum is sensitive to the excitation energy of the nucleus. In particular, the thermal reduction of pairing, and related enhancement of shell effects, at small excitation energies help to develop deeper third minima. At large excitation energies, shell effects are washed out and third minima disappear altogether.
Synchronization in node of complex networks consist of complex chaotic system
Wei, Qiang, E-mail: qiangweibeihua@163.com [Beihua University computer and technology College, BeiHua University, Jilin, 132021, Jilin (China); Digital Images Processing Institute of Beihua University, BeiHua University, Jilin, 132011, Jilin (China); Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, 116024 (China); Xie, Cheng-jun [Beihua University computer and technology College, BeiHua University, Jilin, 132021, Jilin (China); Digital Images Processing Institute of Beihua University, BeiHua University, Jilin, 132011, Jilin (China); Liu, Hong-jun [School of Information Engineering, Weifang Vocational College, Weifang, 261041 (China); Li, Yan-hui [The Library, Weifang Vocational College, Weifang, 261041 (China)
2014-07-15T23:59:59.000Z
A new synchronization method is investigated for node of complex networks consists of complex chaotic system. When complex networks realize synchronization, different component of complex state variable synchronize up to different scaling complex function by a designed complex feedback controller. This paper change synchronization scaling function from real field to complex field for synchronization in node of complex networks with complex chaotic system. Synchronization in constant delay and time-varying coupling delay complex networks are investigated, respectively. Numerical simulations are provided to show the effectiveness of the proposed method.
On the use of consistent approximations for the optimal design of beams
Polak, E.; Neto, C.K.
1994-12-31T23:59:59.000Z
Most optimal design problems can only be solved through discretization. One solution strategy is to expand the original problem into an infinite sequence of finite dimensional, approximating nonlinear programming problems, which can be solved using standard algorithms. In this paper, an expansion strategy based on the concept of consistent approximations is proposed for certain optimal beam design problems, where the beam is modelled using Euler-Bernoulli beam theory. It is shown that any accumulation point of the sequence of the stationary points of the family of approximating problems is a stationary point of the original, infinite-dimensional problem. Numerical results are presented for problems of optimal design of fixed beams.
A thermodynamically consistent Ginzburg-Landau model for superfluid transition in liquid helium
Alessia Berti; Valeria Berti
2012-11-15T23:59:59.000Z
In this paper we propose a thermodynamically consistent model for superfluid-normal phase transition in liquid helium, accounting for variations of temperature and density. The phase transition is described by means of an order parameter, according to the Ginzburg-Landau theory, emphasizing the analogies between superfluidity and superconductivity. The normal component of the velocity is assumed to be compressible and the usual phase diagram of liquid helium is recovered. Moreover, the continuity equation leads to a dependence between density and temperature in agreement with the experimental data.
Lam Hui; William H. Kinney
2002-05-30T23:59:59.000Z
Recent discussions suggest the possibility that short distance physics can significantly modify the behavior of quantum fluctuations in the inflationary universe, and alter the standard large scale structure predictions. Such modifications can be viewed as due to a different choice of the vacuum state. We show that such changes generally lead to violations of the well-known consistency relation between the scalar to tensor ratio and the tensor spectral index. Vacuum effects can introduce an observable modulation to the usual predictions for the scalar and tensor power spectra.
An Active Data-aware Cache Consistency Protocol for Highly-Scalable Data-Shipping DBMS Architectures
Minnesota, University of
An Active Data-aware Cache Consistency Protocol for Highly-Scalable Data-Shipping DBMS overhead for maintaining client directory consistency. We implement ADCC in a page server DBMS architecture. Keywords active control; cache consistency; parallel communication; data- shipping; DBMS 1.INTRODUCTION
False vacuum decay by self-consistent bounces in four dimensions
Jurgen Baacke; Nina Kevlishvili
2006-10-31T23:59:59.000Z
We compute bounce solutions describing false vacuum decay in a Phi**4 model in four dimensions with quantum back-reaction. The back-reaction of the quantum fluctuations on the bounce profiles is computed in the one-loop and Hartree approximations. This is to be compared with the usual semiclassical approach where one computes the profile from the classical action and determines the one-loop correction from this profile. The computation of the fluctuation determinant is performed using a theorem on functional determinants, in addition we here need the Green' s function of the fluctuation operator in oder to compute the quantum back-reaction. As we are able to separate from the determinant and from the Green' s function the leading perturbative orders, we can regularize and renormalize analytically, in analogy of standard perturbation theory. The iteration towards self-consistent solutions is found to converge for some range of the parameters. Within this range the corrections to the semiclassical action are at most a few percent, the corrections to the transition rate can amount to several orders of magnitude. The strongest deviations happen for large couplings, as to be expected. Beyond some limit, there are no self-consistent bounce solutions.
False vacuum decay by self-consistent bounces in four dimensions
Baacke, Juergen; Kevlishvili, Nina [Institut fuer Physik, Universitaet Dortmund, D - 44221 Dortmund (Germany); Institut fuer Physik, Universitaet Dortmund, D - 44221 Dortmund (Germany) and Andronikashvili Institute of Physics, GAS, 0177 Tbilisi (Georgia)
2007-02-15T23:59:59.000Z
We compute bounce solutions describing false vacuum decay in a {phi}{sup 4} model in four dimensions with quantum backreaction. The backreaction of the quantum fluctuations on the bounce profiles is computed in the one-loop and Hartree approximations. This is to be compared with the usual semiclassical approach where one computes the profile from the classical action and determines the one-loop correction from this profile. The computation of the fluctuation determinant is performed using a theorem on functional determinants, in addition we here need the Green's function of the fluctuation operator in oder to compute the quantum backreaction. As we are able to separate from the determinant and from the Gree n's function the leading perturbative orders, we can regularize and renormalize analytically, in analogy of standard perturbation theory. The iteration towards self-consistent solutions is found to converge for some range of the parameters. Within this range the corrections to the semiclassical action are at most a few percent, the corrections to the transition rate can amount to several orders of magnitude. The strongest deviations happen for large couplings, as to be expected. The transition rates are reduced for the one-loop backreaction, for the Hartree backreaction they are reduced for {alpha} < or approx. 0.5 and enhanced for larger values of {alpha}. Beyond some limit, there are no self-consistent bounce solutions.
A Self Consistent Multiprocessor Space Charge Algorithm that is Almost Embarrassingly Parallel
Edward Nissen, B. Erdelyi, S.L. Manikonda
2012-07-01T23:59:59.000Z
We present a space charge code that is self consistent, massively parallelizeable, and requires very little communication between computer nodes; making the calculation almost embarrassingly parallel. This method is implemented in the code COSY Infinity where the differential algebras used in this code are important to the algorithm's proper functioning. The method works by calculating the self consistent space charge distribution using the statistical moments of the test particles, and converting them into polynomial series coefficients. These coefficients are combined with differential algebraic integrals to form the potential, and electric fields. The result is a map which contains the effects of space charge. This method allows for massive parallelization since its statistics based solver doesn't require any binning of particles, and only requires a vector containing the partial sums of the statistical moments for the different nodes to be passed. All other calculations are done independently. The resulting maps can be used to analyze the system using normal form analysis, as well as advance particles in numbers and at speeds that were previously impossible.
Hazard consistent structural demands and in-structure design response spectra
Houston, Thomas W [Los Alamos National Laboratory; Costantino, Michael C [Los Alamos National Laboratory; Costantino, Carl J [Los Alamos National Laboratory
2009-01-01T23:59:59.000Z
Current analysis methodology for the Soil Structure Interaction (SSI) analysis of nuclear facilities is specified in ASCE Standard 4. This methodology is based on the use of deterministic procedures with the intention that enough conservatism is included in the specified procedures to achieve an 80% probability of non-exceedance in the computed response of a Structure, System. or Component for given a mean seismic design input. Recently developed standards are aimed at achieving performance-based, risk consistent seismic designs that meet specified target performance goals. These design approaches rely upon accurately characterizing the probability (hazard) level of system demands due to seismic loads consistent with Probabilistic Seismic Hazard Analyses. This paper examines the adequacy of the deterministic SSI procedures described in ASCE 4-98 to achieve an 80th percentile of Non-Exceedance Probability (NEP) in structural demand, given a mean seismic input motion. The study demonstrates that the deterministic procedures provide computed in-structure response spectra that are near or greater than the target 80th percentile NEP for site profiles other than those resulting in high levels of radiation damping. The deterministic procedures do not appear to be as robust in predicting peak accelerations, which correlate to structural demands within the structure.
ThermoElectric Transport Properties of a Chain of Quantum Dots with Self-Consistent Reservoirs
Philippe A. Jacquet
2009-02-13T23:59:59.000Z
We introduce a model for charge and heat transport based on the Landauer-Buttiker scattering approach. The system consists of a chain of $N$ quantum dots, each of them being coupled to a particle reservoir. Additionally, the left and right ends of the chain are coupled to two particle reservoirs. All these reservoirs are independent and can be described by any of the standard physical distributions: Maxwell-Boltzmann, Fermi-Dirac and Bose-Einstein. In the linear response regime, and under some assumptions, we first describe the general transport properties of the system. Then we impose the self-consistency condition, i.e. we fix the boundary values (T_L,\\mu_L) and (T_R,mu_R), and adjust the parameters (T_i,mu_i), for i = 1,...,N, so that the net average electric and heat currents into all the intermediate reservoirs vanish. This condition leads to expressions for the temperature and chemical potential profiles along the system, which turn out to be independent of the distribution describing the reservoirs. We also determine the average electric and heat currents flowing through the system and present some numerical results, using random matrix theory, showing that these currents are typically governed by Ohm and Fourier laws.
Jacquot, Jonathan; Colas, Laurent, E-mail: laurent.colas@cea.fr; Corre, Yann; Goniche, Marc; Gunn, Jamie; Kubi?, Martin [CEA, IRFM, F-13108 saint-Paul-Lez-Durance (France); Milanesio, Daniele [Department of Electronics Politecnico di Torino, Torino (Italy); Heuraux, Stéphane [IJL UMR 7198, U. de Lorraine P2M, Fac. Des Sciences, BP 70239, F-54506 Vandoeuvre Cedex (France)
2014-06-15T23:59:59.000Z
During the 2011 experimental campaign, one of the three ion cyclotron resonance heating (ICRH) antennas in the Tore Supra tokamak was equipped with a new type of Faraday screen (FS). The new design aimed at minimizing the integrated parallel electric field over long field lines as well as increasing the heat exhaust capability of the actively cooled screen. It proved to be inefficient for attenuating the radio-frequency (RF)-sheaths on the screen itself on the contrary to the heat exhaust concept that allowed operation despite higher heat fluxes on the antenna. In parallel, a new approach has been proposed to model self-consistently RF sheaths: the SSWICH (Self-consistent Sheaths and Waves for IC Heating) code. Simulations results from SSWICH coupled with the TOPICA antenna code were able to reproduce the difference between the two FS designs and part of the spatial pattern of heat loads and Langmuir probe floating potential. The poloidal pattern is a reliable result that mainly depends on the electrical design of the antenna while the radial pattern is on the contrary highly sensitive to loosely constrained parameters such as perpendicular conductivity that generates a DC current circulation from the private region inside the antenna limiters to the free scrape off layer outside these limiters. Moreover, the cantilevered bars seem to be the element in the screen design that enhanced the plasma potential.
Methods for consistent forewarning of critical events across multiple data channels
Hively, Lee M.
2006-11-21T23:59:59.000Z
This invention teaches further method improvements to forewarn of critical events via phase-space dissimilarity analysis of data from biomedical equipment, mechanical devices, and other physical processes. One improvement involves conversion of time-serial data into equiprobable symbols. A second improvement is a method to maximize the channel-consistent total-true rate of forewarning from a plurality of data channels over multiple data sets from the same patient or process. This total-true rate requires resolution of the forewarning indications into true positives, true negatives, false positives and false negatives. A third improvement is the use of various objective functions, as derived from the phase-space dissimilarity measures, to give the best forewarning indication. A fourth improvement uses various search strategies over the phase-space analysis parameters to maximize said objective functions. A fifth improvement shows the usefulness of the method for various biomedical and machine applications.
Horowitz, Jordan M
2015-01-01T23:59:59.000Z
The stochastic thermodynamics of a dilute, well-stirred mixture of chemically-reacting species is built on the stochastic trajectories of reaction events obtained from the Chemical Master Equation. However, when the molecular populations are large, the discrete Chemical Master Equation can be approximated with a continuous diffusion process, like the Chemical Langevin Equation or Low Noise Approximation. In this paper, we investigate to what extent these diffusion approximations inherit the stochastic thermodynamics of the Chemical Master Equation. We find that a stochastic-thermodynamic description is only valid at a detailed-balanced, equilibrium steady state. Away from equilibrium, where there is no consistent stochastic thermodynamics, we show that one can still use the diffusive solutions to approximate the underlying thermodynamics of the Chemical Master Equation.
Johnson, S. G.; Keiser, D. D.; Frank, S. M.; DiSanto, T.; Noy, M.
1999-11-11T23:59:59.000Z
Argonne National Laboratory is developing an electrometallurgical treatment for spent fuel from the experimental breeder reactor II. A product of this treatment process is a metal waste form that incorporates the stainless steel cladding hulls, zirconium from the fuel and the fission products that are noble to the process, i.e., Tc, Ru, Nb, Pd, Rh, Ag. The nominal composition of this waste form is stainless steel/15 wt% zirconium/1--4 wt% noble metal fission products/1--2 wt % U. Leaching results are presented from several tests and sample types: (1) 2 week monolithic immersion tests on actual metal waste forms produced from irradiated cladding hulls, (2) long term (>2 years) pulsed flow tests on samples containing technetium and uranium and (3) crushed sample immersion tests on cold simulated metal waste form samples. The test results will be compared and their relevance for waste form product consistency testing discussed.
Method for using global optimization to the estimation of surface-consistent residual statics
Reister, David B. (Knoxville, TN); Barhen, Jacob (Oak Ridge, TN); Oblow, Edward M. (Knoxville, TN)
2001-01-01T23:59:59.000Z
An efficient method for generating residual statics corrections to compensate for surface-consistent static time shifts in stacked seismic traces. The method includes a step of framing the residual static corrections as a global optimization problem in a parameter space. The method also includes decoupling the global optimization problem involving all seismic traces into several one-dimensional problems. The method further utilizes a Stochastic Pijavskij Tunneling search to eliminate regions in the parameter space where a global minimum is unlikely to exist so that the global minimum may be quickly discovered. The method finds the residual statics corrections by maximizing the total stack power. The stack power is a measure of seismic energy transferred from energy sources to receivers.
Tomasz Schreiber
2009-05-02T23:59:59.000Z
We consider polygonal Markov fields originally introduced by Arak and Surgailis (1982,1989). Our attention is focused on fields with nodes of order two, which can be regarded as continuum ensembles of non-intersecting contours in the plane, sharing a number of salient features with the two-dimensional Ising model. The purpose of this paper is to establish an explicit stochastic representation for the higher-order correlation functions of polygonal Markov fields in their consistency regime. The representation is given in terms of the so-called crop functionals (defined by a Moebius-type formula) of polygonal webs which arise in a graphical construction dual to that giving rise to polygonal fields. The proof of our representation formula goes by constructing a martingale interpolation between the correlation functions of polygonal fields and crop functionals of polygonal webs.
Community consistency determines the stability transition window of power-grid nodes
Kim, Heetae; Holme, Petter
2015-01-01T23:59:59.000Z
The synchrony of electric power systems is important in order to maintain stable electricity supply. Recently, the measure basin stability was introduced to quantify a node's ability to recover its synchronization when perturbed. In this work, we focus on how basin stability depends on the coupling strength between nodes. We use the Chilean power grid as a case study. In general, the basin stability goes from zero to one as the coupling strength increases. However, this transition does happen for the same values for different nodes. By understanding the transition for individual nodes, we can further characterize their role in the power-transmission dynamics. We find that nodes with an exceptionally large transition window also have a low community consistency. In other words, they are hard to classify into one community when applying a community detection algorithm to the network. This also gives an efficient way to identify nodes with a long transition window (which is a computationally time-consuming task)...
Pairing within the self-consistent quasiparticle random-phase approximation at finite temperature
Dang, N Dinh
2008-01-01T23:59:59.000Z
An approach to pairing in finite nuclei at nonzero temperature is proposed, which incorporates the effects due to the quasiparticle-number fluctuation (QNF) around Bardeen-Cooper-Schrieffer (BCS) mean field and dynamic coupling to quasiparticle-pair vibrations within the self-consistent quasiparticle random-phase approximation (SCQRPA). The numerical calculations of pairing gap, total energy, and heat capacity were carried out within a doubly folded multilevel model as well as realistic nuclei $^{56}$Fe and $^{120}$Sn. The results obtained show that, under the effect of QNF, in the region of moderate and strong couplings, the sharp transition between the superconducting and normal phases is smoothed out, resulting in a thermal pairing gap, which does not collapse at the BCS critical temperature, but has a tail, which extends to high temperature. The dynamic coupling of quasiparticles to SCQRPA vibrations significantly improves the agreement with the results of exact calculations and those obtained within the ...
Quantum Chemistry, and Eclectic Mix: From Silicon Carbide to Size Consistency
Jamie Marie Rintelman
2004-12-19T23:59:59.000Z
Chemistry is a field of great breadth and variety. It is this diversity that makes for both an interesting and challenging field. My interests have spanned three major areas of theoretical chemistry: applications, method development, and method evaluation. The topics presented in this thesis are as follows: (1) a multi-reference study of the geometries and relative energies of four atom silicon carbide clusters in the gas phase; (2) the reaction of acetylene on the Si(100)-(2x1) surface; (3) an improvement to the Effective Fragment Potential (EFP) solvent model to enable the study of reactions in both aqueous and nonaqueous solution; and (4) an evaluation of the size consistency of Multireference Perturbation Theory (MRPT). In the following section, the author briefly discusses two topics central to, and present throughout, this thesis: Multi-reference methods and Quantum Mechanics/Molecular Mechanics (QM/MM) methods.
Physically consistent simulation of mesoscale chemical kinetics: The non-negative FIS-{alpha} method
Dana, Saswati, E-mail: saswatid@rishi.serc.iisc.ernet.in [Supercomputer Education and Research Centre, Indian Institute of Science, Bangalore 560012 (India); Raha, Soumyendu, E-mail: raha@serc.iisc.ernet.in [Supercomputer Education and Research Centre, Indian Institute of Science, Bangalore 560012 (India)
2011-10-01T23:59:59.000Z
Biochemical pathways involving chemical kinetics in medium concentrations (i.e., at mesoscale) of the reacting molecules can be approximated as chemical Langevin equations (CLE) systems. We address the physically consistent non-negative simulation of the CLE sample paths as well as the issue of non-Lipschitz diffusion coefficients when a species approaches depletion and any stiffness due to faster reactions. The non-negative Fully Implicit Stochastic {alpha} (FIS {alpha}) method in which stopped reaction channels due to depleted reactants are deleted until a reactant concentration rises again, for non-negativity preservation and in which a positive definite Jacobian is maintained to deal with possible stiffness, is proposed and analysed. The method is illustrated with the computation of active Protein Kinase C response in the Protein Kinase C pathway.
Self-Consistent parallel multi bunch beam-beam simulation using a grid-multipole method
Jones, F; Pieloni, T
2010-01-01T23:59:59.000Z
The simulation code COMBI has been developed to enable the study of coherent beam-beam effects in the full collision scenario of the LHC, with multiple bunches interacting at multiple crossing points over many turns. The parallel version of COMBI was first implemented using a soft-Gaussian collision model which entails minimal communication between worker processes. Recently we have extended the code to a fully self-consistent collision model using a Grid-Multipole method, which allows worker processes to exchange charge and field information in a compact form which minimizes communication overhead. In this paper we describe the Grid-Multipole technique and its adaptation to the parallel environment through pre- and post-processing of charge and grid data. Performance measurements in a Myrinet cluster environment will be given.
Macro-particle FEL model with self-consistent spontaneous radiation
Litvinenko, Vladimir N
2015-01-01T23:59:59.000Z
Spontaneous radiation plays an important role in SASE FELs and storage ring FELs operating in giant pulse mode. It defines the correlation function of the FEL radiation as well as its many spectral features. Simulations of these systems using randomly distributed macro-particles with charge much higher that of a single electron create the problem of anomalously strong spontaneous radiation, limiting the capabilities of many FEL codes. In this paper we present a self-consistent macro-particle model which provided statistically exact simulation of multi-mode, multi-harmonic and multi-frequency short-wavelength 3-D FELs including the high power and saturation effects. The use of macro-particle clones allows both spontaneous and induced radiation to be treated in the same fashion. Simulations using this model do not require a seed and provide complete temporal and spatial structure of the FEL optical field.
Jun Li; Jinshuang Jin; Xin-Qi Li; YiJing Yan
2014-06-26T23:59:59.000Z
Beyond the second-order Born approximation, we develop an improved master equation approach to quantum transport by virtue of a self-consistent Born approximation. The basic idea is replacing the free Green's function in the tunneling self-energy by an effective reduced propagator under the Born approximation. We found that the effect of this simple improvement is remarkable, for instance, it can not only recover the exact result of noninteracting transport under arbitrary voltages, but also predict the challenging nonequilibrium Kondo effect. In addition to having an elegant structure, the application convenience and accuracy of the proposed scheme, as demonstrated by the examples in this work, may suggest it a useful tool for quantum transports.
Tretiak, Sergei [Los Alamos National Laboratory
2008-01-01T23:59:59.000Z
Four different numerical algorithms suitable for a linear scaling implementation of time-dependent Hartree-Fock and Kohn-Sham self-consistent field theories are examined. We compare the performance of modified Lanczos, Arooldi, Davidson, and Rayleigh quotient iterative procedures to solve the random-phase approximation (RPA) (non-Hermitian) and Tamm-Dancoff approximation (TDA) (Hermitian) eigenvalue equations in the molecular orbital-free framework. Semiempirical Hamiltonian models are used to numerically benchmark algorithms for the computation of excited states of realistic molecular systems (conjugated polymers and carbon nanotubes). Convergence behavior and stability are tested with respect to a numerical noise imposed to simulate linear scaling conditions. The results single out the most suitable procedures for linear scaling large-scale time-dependent perturbation theory calculations of electronic excitations.
Can thermal inflation be consistent with baryogenesis in gauge-mediated SUSY breaking models?
Hayakawa, Taku; Yamada, Masaki
2015-01-01T23:59:59.000Z
Thermal inflation is an attractive idea to dilute cosmic density of unwanted particles such as moduli fields which cause cosmological difficulties. However, it also dilutes preexisting baryon asymmetry and some viable baryogenesis is necessary for a cosmologically consistent scenario. We investigate whether the Affleck-Dine mechanism can produce baryon asymmetry enough to survive after the dilution in gauge-mediated SUSY breaking models. Flat directions except for $LH_u$ flat direction cannot provide such huge baryon number because of Q-ball formation. We show that although the $LH_u$ flat direction is special in terms of having $\\mu$-term which prevents Q-ball formation, it cannot explain the observed baryon asymmetry either.
Large tensor mode, field range bound and consistency in generalized G-inflation
Kunimitsu, Taro; Watanabe, Yuki; Yokoyama, Jun'ichi
2015-01-01T23:59:59.000Z
We systematically show that in potential driven generalized G-inflation models, quantum corrections coming from new physics at the strong coupling scale can be avoided, while producing observable tensor modes. The effective action can be approximated by the tree level action, and as a result, these models are internally consistent, despite the fact that we introduced new mass scales below the energy scale of inflation. Although observable tensor modes are produced with sub-strong coupling scale field excursions, this is not an evasion of the Lyth bound, since the models include higher-derivative non-canonical kinetic terms, and effective rescaling of the field would result in super-Planckian field excursions. We argue that the enhanced kinetic term of the inflaton screens the interactions with other fields, keeping the system weakly coupled during inflation.
Self-consistent electrodynamics of large-area high-frequency capacitive plasma discharge
Chen Zhigang; Rauf, Shahid; Collins, Ken [Applied Materials, Inc., 974 E. Arques Avenue, Sunnyvale, California 94085 (United States)
2010-10-15T23:59:59.000Z
Capacitively coupled plasmas (CCPs) generated using high frequency (3-30 MHz) and very high frequency (30-300 MHz) radio-frequency (rf) sources are used for many plasma processing applications including thin film etching and deposition. When chamber dimensions become commensurate with the effective rf wavelength in the plasma, electromagnetic wave effects impose a significant influence on plasma behavior. Because the effective rf wavelength in plasma depends upon both rf and plasma process conditions (e.g., rf power and gas pressure), a self-consistent model including both the rf power delivery system and the plasma discharge is highly desirable to capture a more complete physical picture of the plasma behavior. A three-dimensional model for self-consistently studying both electrodynamic and plasma dynamic behavior of large-area (Gen 10, >8 m{sup 2}) CCP is described in this paper. This model includes Maxwell's equations and transport equations for charged and neutral species, which are coupled and solved in the time domain. The complete rf plasma discharge chamber including the rf power delivery subsystem, rf feed, electrodes, and the plasma domain is modeled as an integrated system. Based on this full-wave solution model, important limitations for processing uniformity imposed by electromagnetic wave propagation effects in a large-area CCP (3.05x2.85 m{sup 2} electrode size) are studied. The behavior of H{sub 2} plasmas in such a reactor is examined from 13.56 to 200 MHz. It is shown that various rectangular harmonics of electromagnetic fields can be excited in a large-area rectangular reactor as the rf or power is increased. The rectangular harmonics can create not only center-high plasma distribution but also high plasma density at the corners and along the edges of the reactor.
The dusty MOCASSIN: fully self-consistent 3D photoionisation and dust radiative transfer models
B. Ercolano; M. J. Barlow; P. J. Storey
2005-07-02T23:59:59.000Z
We present the first 3D Monte Carlo (MC) photoionisation code to include a fully self-consistent treatment of dust radiative transfer (RT) within a photoionised region. This is the latest development (Version 2.0) of the gas-only photoionisation code MOCASSIN (Ercolano et al., 2003a), and employs a stochastic approach to the transport of radiation, allowing both the primary and secondary components of the radiation field to be treated self-consistently, whilst accounting for the scattering of radiation by dust grains mixed with the gas, as well as the absorption and emission of radiation by both the gas and the dust components. A set of rigorous benchmark tests have been carried out for dust-only spherically symmetric geometries and 2D disk configurations. MOCASSIN's results are found to be in agreement with those obtained by well established dust-only RT codes that employ various approaches to the solution of the RT problem. A model of the dust and of the photoionised gas components of the planetary nebula (PN) NGC 3918 is also presented as a means of testing the correct functioning of the RT procedures in a case where both gas and dust opacities are present. The two components are coupled via the heating of dust grains by the absorption of both UV continuum photons and resonance line photons emitted by the gas. The MOCASSIN results show agreement with those of a 1D dust and gas model of this nebula published previously, showing the reliability of the new code, which can be applied to a variety of astrophysical environments.
BRANNON,REBECCA M.
2000-11-01T23:59:59.000Z
A theory is developed for the response of moderately porous solids (no more than {approximately}20% void space) to high-strain-rate deformations. The model is consistent because each feature is incorporated in a manner that is mathematically compatible with the other features. Unlike simple p-{alpha} models, the onset of pore collapse depends on the amount of shear present. The user-specifiable yield function depends on pressure, effective shear stress, and porosity. The elastic part of the strain rate is linearly related to the stress rate, with nonlinear corrections from changes in the elastic moduli due to pore collapse. Plastically incompressible flow of the matrix material allows pore collapse and an associated macroscopic plastic volume change. The plastic strain rate due to pore collapse/growth is taken normal to the yield surface. If phase transformation and/or pore nucleation are simultaneously occurring, the inelastic strain rate will be non-normal to the yield surface. To permit hardening, the yield stress of matrix material is treated as an internal state variable. Changes in porosity and matrix yield stress naturally cause the yield surface to evolve. The stress, porosity, and all other state variables vary in a consistent manner so that the stress remains on the yield surface throughout any quasistatic interval of plastic deformation. Dynamic loading allows the stress to exceed the yield surface via an overstress ordinary differential equation that is solved in closed form for better numerical accuracy. The part of the stress rate that causes no plastic work (i.e-, the part that has a zero inner product with the stress deviator and the identity tensor) is given by the projection of the elastic stressrate orthogonal to the span of the stress deviator and the identity tensor.The model, which has been numerically implemented in MIG format, has been exercised under a wide array of extremal loading and unloading paths. As will be discussed in a companion sequel report, the CKP model is capable of closely matching plate impact measurements for porous materials.
Consistent satellite XCO2 retrievals from SCIAMACHY and GOSAT using the BESD algorithm
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Heymann, J.; Reuter, M.; Hilker, M.; Buchwitz, M.; Schneising, O.; Bovensmann, H.; Burrows, J. P.; Kuze, A.; Suto, H.; Deutscher, N. M.; et al
2015-02-13T23:59:59.000Z
Consistent and accurate long-term data sets of global atmospheric concentrations of carbon dioxide (CO2) are required for carbon cycle and climate related research. However, global data sets based on satellite observations may suffer from inconsistencies originating from the use of products derived from different satellites as needed to cover a long enough time period. One reason for inconsistencies can be the use of different retrieval algorithms. We address this potential issue by applying the same algorithm, the Bremen Optimal Estimation DOAS (BESD) algorithm, to different satellite instruments, SCIAMACHY on-board ENVISAT (March 2002–April 2012) and TANSO-FTS on-board GOSAT (launched in Januarymore »2009), to retrieve XCO2, the column-averaged dry-air mole fraction of CO2. BESD has been initially developed for SCIAMACHY XCO2 retrievals. Here, we present the first detailed assessment of the new GOSAT BESD XCO2 product. GOSAT BESD XCO2 is a product generated and delivered to the MACC project for assimilation into ECMWF's Integrated Forecasting System (IFS). We describe the modifications of the BESD algorithm needed in order to retrieve XCO2 from GOSAT and present detailed comparisons with ground-based observations of XCO2 from the Total Carbon Column Observing Network (TCCON). We discuss detailed comparison results between all three XCO2 data sets (SCIAMACHY, GOSAT and TCCON). The comparison results demonstrate the good consistency between the SCIAMACHY and the GOSAT XCO2. For example, we found a mean difference for daily averages of ?0.60 ± 1.56 ppm (mean difference ± standard deviation) for GOSAT-SCIAMACHY (linear correlation coefficient r = 0.82), ?0.34 ± 1.37 ppm (r = 0.86) for GOSAT-TCCON and 0.10 ± 1.79 ppm (r = 0.75) for SCIAMACHY-TCCON. The remaining differences between GOSAT and SCIAMACHY are likely due to non-perfect collocation (±2 h, 10° × 10° around TCCON sites), i.e., the observed air masses are not exactly identical, but likely also due to a still non-perfect BESD retrieval algorithm, which will be continuously improved in the future. Our overarching goal is to generate a satellite-derived XCO2 data set appropriate for climate and carbon cycle research covering the longest possible time period. We therefore also plan to extend the existing SCIAMACHY and GOSAT data set discussed here by using also data from other missions (e.g., OCO-2, GOSAT-2, CarbonSat) in the future.« less
Is the firewall consistent? Gedanken experiments on black hole complementarity and firewall proposal
Hwang, Dong-il; Lee, Bum-Hoon; Yeom, Dong-han, E-mail: dongil.j.hwang@gmail.com, E-mail: bhl@sogang.ac.kr, E-mail: innocent.yeom@gmail.com [Center for Quantum Spacetime, Sogang University, Seoul 121-742 (Korea, Republic of)
2013-01-01T23:59:59.000Z
In this paper, we discuss the black hole complementarity and the firewall proposal at length. Black hole complementarity is inevitable if we assume the following five things: unitarity, entropy-area formula, existence of an information observer, semi-classical quantum field theory for an asymptotic observer, and the general relativity for an in-falling observer. However, large N rescaling and the AMPS argument show that black hole complementarity is inconsistent. To salvage the basic philosophy of the black hole complementarity, AMPS introduced a firewall around the horizon. According to large N rescaling, the firewall should be located close to the apparent horizon. We investigate the consistency of the firewall with the two critical conditions: the firewall should be near the time-like apparent horizon and it should not affect the future infinity. Concerning this, we have introduced a gravitational collapse with a false vacuum lump which can generate a spacetime structure with disconnected apparent horizons. This reveals a situation that there is a firewall outside of the event horizon, while the apparent horizon is absent. Therefore, the firewall, if it exists, not only does modify the general relativity for an in-falling observer, but also modify the semi-classical quantum field theory for an asymptotic observer.
Consistent decoupling of heavy scalars and moduli in N=1 supergravity
Achucarro, Ana [Instituut-Lorentz for Theoretical Physics, Leiden (Netherlands); Department of Theoretical Physics, University of the Basque Country UPV-EHU, 48940 Bilbao (Spain); Hardeman, Sjoerd; Sousa, Kepa [Instituut-Lorentz for Theoretical Physics, Leiden (Netherlands)
2008-11-15T23:59:59.000Z
We consider the conditions for integrating out heavy chiral fields and moduli in N=1 supergravity, subject to two explicit requirements. First, the expectation values of the heavy fields should be unaffected by low energy phenomena. Second, the low energy effective action should be described by N=1 supergravity. This leads to a working definition of decoupling in N=1 supergravity that is different from the usual condition of gravitational strength couplings between sectors, and that is the relevant one for inflation with moduli stabilization, where some light fields (the inflaton) can have long excursions in field space. It is also important for finding de Sitter vacua in flux compactifications such as LARGE volume and Kachru-Kallosh-Linde-Trivedi (KKLT) scenarios, since failure of the decoupling condition invalidates the implicit assumption that the stabilization and uplifting potentials have a low energy supergravity description. We derive a sufficient condition for supersymmetric decoupling, namely, that the Kaehler invariant function G=K+log|W|{sup 2} is of the form G=L(light,H(heavy)) with H and L arbitrary functions, which includes the particular case G=L(light)+H(heavy). The consistency condition does not hold in general for the ansatz K=K(light)+K(heavy), W=W(light)+W(heavy) and we discuss under what circumstances it does hold.
The Quark Propagator in the NJL Model in a self-consistent 1/Nc Expansion
Daniel Müller; Michael Buballa; Jochen Wambach
2010-05-04T23:59:59.000Z
The quark propagator is calculated in the Nambu-Jona-Lasinio (NJL) model in a self-consistent 1/Nc-expansion at next-to-leading order. The calculations are carried out iteratively in Euclidean space. The chiral quark condensate and its dependence on temperature and chemical potential is calculated directly and compared with the mean-field results. In the chiral limit, we find a second-order phase transition at finite temperature and zero chemical potential, in agreement with universality arguments. At zero temperature and finite chemical potential, the phase transition is first order. In comparison with the mean-field results, the critical temperature and chemical potential are slightly reduced. We determine spectral functions from the Euclidean propagators by employing the Maximum-Entropy-Method (MEM). Thereby quark and meson masses are estimated and decay channels identified. For testing this method, we also apply it to evaluate perturbative spectral functions, which can be calculated directly in Minkowski space. In most cases we find that MEM is able to reproduce the rough features of the spectral functions, but not the details.
Serkan Akkoyun; Nihat Yildiz
2012-07-23T23:59:59.000Z
The gamma-ray tracking technique is one of the highly efficient detection method in experimental nuclear structure physics. On the basis of this method, two gamma-ray tracking arrays, AGATA in Europe and GRETA in the USA, are currently being developed. The interactions of neutrons in these detectors lead to an unwanted background in the gamma-ray spectra. Thus, the interaction points of neutrons in these detectors have to be determined in the gamma-ray tracking process in order to improve photo-peak efficiencies and peak-to-total ratios of the gamma-ray peaks. Therefore, the recoil energy distributions of germanium nuclei due to inelastic scatterings of 1-5 MeV neutrons were obtained both experimentally and using artificial neural networks. Also, for highly nonlinear detector response for recoiling germanium nuclei, we have constructed consistent empirical physical formulas (EPFs) by appropriate layered feed-forward neural networks (LFNNs). These LFNN-EPFs can be used to derive further physical functions which could be relevant to determination of neutron interactions in gamma-ray tracking process.
Consistent Multigroup Theory Enabling Accurate Course-Group Simulation of Gen IV Reactors
Rahnema, Farzad; Haghighat, Alireza; Ougouag, Abderrafi
2013-11-29T23:59:59.000Z
The objective of this proposal is the development of a consistent multi-group theory that accurately accounts for the energy-angle coupling associated with collapsed-group cross sections. This will allow for coarse-group transport and diffusion theory calculations that exhibit continuous energy accuracy and implicitly treat cross- section resonances. This is of particular importance when considering the highly heterogeneous and optically thin reactor designs within the Next Generation Nuclear Plant (NGNP) framework. In such reactors, ignoring the influence of anisotropy in the angular flux on the collapsed cross section, especially at the interface between core and reflector near which control rods are located, results in inaccurate estimates of the rod worth, a serious safety concern. The scope of this project will include the development and verification of a new multi-group theory enabling high-fidelity transport and diffusion calculations in coarse groups, as well as a methodology for the implementation of this method in existing codes. This will allow for a higher accuracy solution of reactor problems while using fewer groups and will reduce the computational expense. The proposed research represents a fundamental advancement in the understanding and improvement of multi- group theory for reactor analysis.
Is there a "most perfect fluid" consistent with quantum field theory?
Thomas D. Cohen
2007-03-05T23:59:59.000Z
It was recently conjectured that the ratio of the shear viscosity to entropy density, $ \\eta/ s$, for any fluid always exceeds $\\hbar/(4 \\pi k_B)$. This conjecture was motivated by quantum field theoretic results obtained via the AdS/CFT correspondence and from empirical data with real fluids. A theoretical counterexample to this bound can be constructed from a nonrelativistic gas by increasing the number of species in the fluid while keeping the dynamics essentially independent of the species type. The question of whether the underlying structure of relativistic quantum field theory generically inhibits the realization of such a system and thereby preserves the possibility of a universal bound is considered here. Using rather conservative assumptions, it is shown here that a metastable gas of heavy mesons in a particular controlled regime of QCD provides a realization of the counterexample and is consistent with a well-defined underlying relativistic quantum field theory. Thus, quantum field theory appears to impose no lower bound on $\\eta/s$, at least for metastable fluids.
Haymaker, R W; Haymaker, Richard W.; Matsuki, Takayuki
2005-01-01T23:59:59.000Z
We revisit the confinement problem in maximal Abelian gauge SU(2) gluodynamics as a dual superconductor through the study of the dual Abrikosov vortex. There are three effects that have not been included in previous studies. We employ a definition of flux that satisfies the exact Ward-Takahashi identity giving exact electric Maxwell equations for lattice averages. Second we modify the standard definition of magnetic current to give consistent magnetic Maxwell equations. Finally we point out that the dual Ginzburg-Landau-Higgs model is an oversimplification of the physics of the system because of the presence of significant electric currents. As a result we need a third parameter to describe the vortex in addition to the standard ones, i.e., the London penetration depth and the coherence length. Without a complete model at our disposal, we estimate the values of these three parameters for $\\beta = 2.5115$ on a $32^4$ lattice. As a digression, we also show that the truncation of monopoles to the percolating clu...
Universal consistent truncation for 6d/7d gauge/gravity duals
Achilleas Passias; Andrea Rota; Alessandro Tomasiello
2015-06-17T23:59:59.000Z
Recently, AdS_7 solutions of IIA supergravity have been classified; there are infinitely many of them, whose expression is known analytically, and with internal space of S^3 topology. Their field theory duals are six-dimensional (1,0) SCFT's. In this paper we show that for each of these AdS_7 solutions there exists a consistent truncation from massive IIA supergravity to minimal gauged supergravity in seven dimensions. This theory has an SU(2) gauge group, and a single scalar, whose value is related to a certain distortion of the internal S^3. This explains the universality observed in recent work on AdS_5 and AdS_4 solutions dual to compactifications of the (1,0) SCFT_6's. Thanks to previous work on the minimal gauged supergravity, the truncation also implies the existence of holographic RG-flows connecting those solutions to the AdS_7 vacuum, as well as new classes of IIA AdS_3 solutions.
Universal consistent truncation for 6d/7d gauge/gravity duals
Passias, Achilleas; Tomasiello, Alessandro
2015-01-01T23:59:59.000Z
Recently, AdS_7 solutions of IIA supergravity have been classified; there are infinitely many of them, whose expression is known analytically, and with internal space of S^3 topology. Their field theory duals are six-dimensional (1,0) SCFT's. In this paper we show that for each of these AdS_7 solutions there exists a consistent truncation from massive IIA supergravity to minimal gauged supergravity in seven dimensions. This theory has an SU(2) gauge group, and a single scalar, whose value is related to a certain distortion of the internal S^3. This explains the universality observed in recent work on AdS_5 and AdS_4 solutions dual to compactifications of the (1,0) SCFT_6's. Thanks to previous work on the minimal gauged supergravity, the truncation also implies the existence of holographic RG-flows connecting those solutions to the AdS_7 vacuum, as well as new classes of IIA AdS_3 solutions.
Product consistency leach tests of Savannah River Site radioactive waste glasses
Bibler, N.E. (Westinghouse Savannah River Co., Aiken, SC (United States)); Bates, J.K. (Argonne National Lab., IL (United States))
1989-01-01T23:59:59.000Z
The Product Consistency Test (PCT) is a glass leach test that was developed at the Savannah River Site (SRS) to routinely confirm the durability of nuclear waste glasses that will be produced in the Defense Waste Processing Facility. The PCT is a 7 day, crushed glass leach test in deionized water at 90{degree}C. Final leachates are filtered and acidified prior to analysis. To demonstrate the reproducibility of the PCT when performed remotely, SRS and Argonne National Laboratory have performed the PCT on samples of two radioactive glasses. The tests were also performed to compare the releases of the radionuclides with the major nonradioactive glass components and to determine if radiation from the glass was affecting the results of the PCT. The test was performed in triplicate at each laboratory. For the major soluble elements, B, Li, Na, and Si, in the glass, each investigator obtained relative precisions in the range 2--5% in the triplicate tests. This range indicates good precision for the PCT when performed remotely with master slave manipulators in a shielded cell environment.
Zitrin, Adi [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, MS 249-17, Pasadena, CA 91125 (United States); Redlich, Matthias [Universität Heidelberg, Zentrum für Astronomie, Institut für Theoretische Astrophysik, Philosophenweg 12, D-69120 Heidelberg (Germany); Broadhurst, Tom, E-mail: adizitrin@gmail.com [Department of Theoretical Physics, University of Basque Country UPV/EHU, Bilbao (Spain)
2014-07-01T23:59:59.000Z
We discuss how Type Ia supernovae (SNe) strongly magnified by foreground galaxy clusters should be self-consistently treated when used in samples fitted for the cosmological parameters. While the cluster lens magnification of a SN can be well constrained from sets of multiple images of various background galaxies with measured redshifts, its value is typically dependent on the fiducial set of cosmological parameters used to construct the mass model. In such cases, one should not naively demagnify the observed SN luminosity by the model magnification into the expected Hubble diagram, which would create a bias, but instead take into account the cosmological parameters a priori chosen to construct the mass model. We quantify the effect and find that a systematic error of typically a few percent, up to a few dozen percent per magnified SN may be propagated onto a cosmological parameter fit unless the cosmology assumed for the mass model is taken into account (the bias can be even larger if the SN is lying very near the critical curves). We also simulate how such a bias propagates onto the cosmological parameter fit using the Union2.1 sample supplemented with strongly magnified SNe. The resulting bias on the deduced cosmological parameters is generally at the few percent level, if only few biased SNe are included, and increases with the number of lensed SNe and their redshift. Samples containing magnified Type Ia SNe, e.g., from ongoing cluster surveys, should readily account for this possible bias.
Self-Consistent Screening Approximation for Flexible Membranes: Application to Graphene
K. V. Zakharchenko; R. Roldan; A. Fasolino; M. I. Katsnelson
2010-09-20T23:59:59.000Z
Crystalline membranes at finite temperatures have an anomalous behavior of the bending rigidity that makes them more rigid in the long wavelength limit. This issue is particularly relevant for applications of graphene in nano- and micro-electromechanical systems. We calculate numerically the height-height correlation function $G(q)$ of crystalline two-dimensional membranes, determining the renormalized bending rigidity, in the range of wavevectors $q$ from $10^{-7}$ \\AA$^{-1}$ till 10 \\AA$^{-1}$ in the self-consistent screening approximation (SCSA). For parameters appropriate to graphene, the calculated correlation function agrees reasonably with the results of atomistic Monte Carlo simulations for this material within the range of $q$ from $10^{-2}$ \\AA$^{-1}$ till 1 \\AA$^{-1}$. In the limit $q\\rightarrow 0$ our data for the exponent $\\eta$ of the renormalized bending rigidity $\\kappa_R(q)\\propto q^{-\\eta}$ is compatible with the previously known analytical results for the SCSA $\\eta\\simeq 0.82$. However, this limit appears to be reached only for $q<10^{-5}$ \\AA$^{-1}$ whereas at intermediate $q$ the behavior of $G(q)$ cannot be described by a single exponent.
On the Consistency of QCBED Structure Factor Measurements for TiO2 (Rutile)
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Jiang, Bin; Zuo, Jian-Min; Friis, Jesper; Spence, John C.H.
2003-09-16T23:59:59.000Z
The same Bragg reflection in TiO2 from twelve different CBED patterns (from different crystals, orientations and thicknesses) are analysed quantitatively in order to evaluate the consistency of the QCBED method for bond-charge mapping. The standard deviation in the resulting distribution of derived X-ray structure factors is found to be an order of magnitude smaller than that in conventional X-ray work , and the standard error (0.026% for FX(110)) is slightly better than obtained by the X-ray Pendellosung method applied to silicon. This is sufficiently accuracy to distinguish between atomic, covalent and ionic models of bonding. We describe the importance of extracting experimental parameters from CCD camera characterization, and of surface oxidation and crystal shape. The current experiments show that the QCBED method is now a robust and powerful tool for low order structure factor measurement, which does not suffer from the large extinction (multiple scattering) errors which occur in inorganic X-ray crystallography, and may be applied to nanocrystals. Our results will be used to understand the role of d electrons in the chemical bonding of TiO2.
Community consistency determines the stability transition window of power-grid nodes
Heetae Kim; Sang Hoon Lee; Petter Holme
2015-04-28T23:59:59.000Z
The synchrony of electric power systems is important in order to maintain stable electricity supply. Recently, the measure basin stability was introduced to quantify a node's ability to recover its synchronization when perturbed. In this work, we focus on how basin stability depends on the coupling strength between nodes. We use the Chilean power grid as a case study. In general, basin stability goes from zero to one as coupling strength increases. However, this transition does not happen at the same value for different nodes. By understanding the transition for individual nodes, we can further characterize their role in the power-transmission dynamics. We find that nodes with an exceptionally large transition window also have a low community consistency. In other words, they are hard to classify to one community when applying a community detection algorithm. This also gives an efficient way to identify nodes with a long transition window (which is computationally time consuming). Finally, to corroborate these results, we present a stylized example network with prescribed community structures that captures the mentioned characteristics of basin stability transition and recreates our observations.
Bernardo, Giuseppe Di [Department of Physics, University of Gothenburg, SE 412 96 Gothenburg (Sweden); Evoli, Carmelo [II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany); Gaggero, Daniele [SISSA, Via Bonomea 265, 34136 Trieste (Italy); Grasso, Dario [Dipartimento di Fisica, Università di Siena, Via Roma 56, I-56100 Siena (Italy); Maccione, Luca, E-mail: giuseppe.dibernardo@physics.gu.se, E-mail: carmelo.evoli@desy.de, E-mail: dgaggero@sissa.it, E-mail: dario.grasso@pi.infn.it, E-mail: luca.maccione@lmu.de [Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, D-80805 München (Germany)
2013-03-01T23:59:59.000Z
A multichannel analysis of cosmic ray electron and positron spectra and of the diffuse synchrotron emission of the Galaxy is performed by using the DRAGON code. This study is aimed at probing the interstellar electron source spectrum down to E ?< 1GeV and at constraining several propagation parameters. We find that above 4GeV the e{sup ?} source spectrum is compatible with a power-law of index ? 2.5. Below 4GeV instead it must be significantly suppressed and the total lepton spectrum is dominated by secondary particles. The positron spectrum and fraction measured below a few GeV are consistently reproduced only within low reacceleration models. We also constrain the scale-height z{sub t} of the cosmic-ray distribution using three independent (and, in two cases, original) arguments, showing that values of z{sub t} ?< 2kpc are excluded. This result may have strong implications for particle dark matter searches.
A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood
Bell, Cameron P M; Naylor, Tim
2015-01-01T23:59:59.000Z
We present a self-consistent, absolute isochronal age scale for young (solar neighbourhood based on homogeneous fitting of semi-empirical pre-main-sequence model isochrones using the tau^2 maximum-likelihood fitting statistic of Naylor & Jeffries in the M_V, V-J colour-magnitude diagram. The final adopted ages for the groups are: 149+51-19 Myr for the AB Dor moving group, 24+/-3 Myr for the {\\beta} Pic moving group (BPMG), 45+11-7 Myr for the Carina association, 42+6-4 Myr for the Columba association, 11+/-3 Myr for the {\\eta} Cha cluster, 45+/-4 Myr for the Tucana-Horologium moving group (Tuc-Hor), 10+/-3 Myr for the TW Hya association, and 22+4-3 Myr for the 32 Ori group. At this stage we are uncomfortable assigning a final, unambiguous age to the Argus association as our membership list for the association appears to suffer from a high level of contamination, and therefore it remains unclear whether these stars represent a single population of co...
Effects of temperature and radiation on the nuclear waste glass product consistency leach test
Crawford, C.L.; Bibler, N.E.
1993-01-01T23:59:59.000Z
Previous leach studies carried out with monolithic glass samples have shown that glass dissolution rates increase with increasing temperature and may or may not increase on exposure to external gamma radiolysis. In this study we have investigated the effects of temperature (70--1200[degrees]C) and radiation on the dissolution of simulated radioactive waste glasses using the Product Consistency Test (PCT). The PCT is a seven day, crushed glass leach test in deionized water that is carried out at 9OO[degrees]C. To date our results indicate no significant effect of external Co--60 gamma radiation when testing various simulated waste glasses at 90[degrees]C in a wellinsulated compartment within a Gammacell 220 irradiation unit. The temperature dependence for glass dissolution clearly exhibits Arrheniustype behavior for two of the three glasses tested. For the third glass the dissolution decreases at the higher temperatures, probably due to saturation effects. Actual radioactive waste glasses will be investigated later as part of this study.
Effects of temperature and radiation on the nuclear waste glass product consistency leach test
Crawford, C.L.; Bibler, N.E.
1993-04-01T23:59:59.000Z
Previous leach studies carried out with monolithic glass samples have shown that glass dissolution rates increase with increasing temperature and may or may not increase on exposure to external gamma radiolysis. In this study we have investigated the effects of temperature (70--1200{degrees}C) and radiation on the dissolution of simulated radioactive waste glasses using the Product Consistency Test (PCT). The PCT is a seven day, crushed glass leach test in deionized water that is carried out at 9OO{degrees}C. To date our results indicate no significant effect of external Co--60 gamma radiation when testing various simulated waste glasses at 90{degrees}C in a wellinsulated compartment within a Gammacell 220 irradiation unit. The temperature dependence for glass dissolution clearly exhibits Arrheniustype behavior for two of the three glasses tested. For the third glass the dissolution decreases at the higher temperatures, probably due to saturation effects. Actual radioactive waste glasses will be investigated later as part of this study.
Marra, J
2006-01-19T23:59:59.000Z
The Department of Energy Office of Environmental Management (DOE/EM) plans to conduct the Plutonium Disposition Project at the Savannah River Site (SRS) to disposition excess weapons-usable plutonium. A plutonium glass waste form is a leading candidate for immobilization of the plutonium for subsequent disposition in a geologic repository. A reference glass composition (Lanthanide Borosilicate (LaBS) Frit B) was developed during the Plutonium Immobilization Program (PIP) to immobilize plutonium. A limited amount of performance testing was performed on this baseline composition before efforts to further pursue Pu disposition via a glass waste form ceased. Therefore, the objectives of this present task were to fabricate plutonium loaded LaBS Frit B glass and perform additional testing to provide near-term data that will increase confidence that LaBS glass product is suitable for disposal in the Yucca Mountain Repository. Specifically, testing was conducted in an effort to provide data to Yucca Mountain Project (YMP) personnel for use in performance assessment calculations. Plutonium containing LaBS glass with the Frit B composition with a 9.5 wt% PuO{sub 2} loading was prepared for testing. Glass was prepared to support Product Consistency Testing (PCT) at Savannah River National Laboratory (SRNL) and for additional performance testing at Argonne National Laboratory (ANL) and Pacific Northwest National Laboratory (PNNL). The glass was characterized using x-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS) prior to performance testing. A series of PCTs were conducted at SRNL with varying exposed surface area and test durations. The leachates from these tests were analyzed to determine the dissolved concentrations of key elements. Acid stripping of leach vessels was performed to determine the concentration of the glass constituents that may have sorbed on the vessels during leach testing. Additionally, the leachate solutions were ultrafiltered to quantify colloid formation. The leached solids from select PCTs were examined in an attempt to evaluate the Pu and neutron absorber release behavior from the glass and to identify the formation of alteration phases on the glass surface. Characterization of the glass prior to testing revealed that some undissolved plutonium oxide was present in the glass. The undissolved particles had a disk-like morphology and likely formed via coarsening of particles in areas compositionally enriched in plutonium. Similar disk-like PuO{sub 2} phases were observed in previous LaBS glass testing at PNNL. In that work, researchers concluded that plutonium formed with this morphology as a result of the leaching process. It was more likely that the presence of the plutonium oxide crystals in the PNNL testing was a result of glass fabrication. A series of PCTs were conducted at 90 C in ASTM Type 1 water. The PCT-Method A (PCT-A) was conducted to compare the Pu LaBS Frit B glass durability to current requirements for High Level Waste (HLW) glass in a geologic repository. The PCT-A test has a strict protocol and is designed to specifically be used to evaluate whether the chemical durability and elemental release characteristics of a nuclear waste glass have been consistently controlled during production and, thus, meet the repository acceptance requirements. The PCT-A results on the Pu containing LaBS Frit B glass showed that the glass was very durable with a normalized elemental release value for boron of approximately 0.02 g/L. This boron release value was better than two orders of magnitude better from a boron release standpoint than the current Environmental Assessment (EA) glass used for repository acceptance. The boron release value for EA glass is 16.7 g/L.
Klett, Katherine J.; Torgersen, Christian; Henning, Julie; Murray, Christopher J.
2013-04-28T23:59:59.000Z
We investigated the spawning patterns of Chinook salmon Oncorhynchus tshawytscha on the lower Cowlitz River, Washington (USA) using a unique set of fine- and coarse-scale 35 temporal and spatial data collected during bi-weekly aerial surveys conducted in 1991-2009 (500 m to 28 km resolution) and 2008-2009 (100-500 m resolution). Redd locations were mapped from a helicopter during 2008 and 2009 with a hand-held global positioning system (GPS) synchronized with in-flight audio recordings. We examined spatial patterns of Chinook salmon redd reoccupation among and within years in relation to segment-scale geomorphic features. Chinook salmon spawned in the same sections each year with little variation among years. On a coarse scale, five years (1993, 1998, 2000, 2002, and 2009) were compared for reoccupation. Redd locations were highly correlated among years resulting in a minimum correlation coefficient of 0.90 (adjusted P = 0.002). Comparisons on a fine scale (500 m) between 2008 and 2009 also revealed a high degree of consistency among redd locations (P < 0.001). On a finer temporal scale, we observed that salmon spawned in the same sections during the first and last week (2008: P < 0.02; and 2009: P < 0.001). Redds were clustered in both 2008 and 2009 (P < 0.001). Regression analysis with a generalized linear model at the 500-m scale indicated that river kilometer and channel bifurcation were positively associated with redd density, whereas sinuosity was negatively associated with redd density. Collecting data on specific redd locations with a GPS during aerial surveys was logistically feasible and cost effective and greatly enhanced the spatial precision of Chinook salmon spawning surveys.
Y. Méheust; K. P. S. Parmar; B. Schjelderupsen; J. O. Fossum
2010-02-01T23:59:59.000Z
Under application of an electric field greater than a triggering electric field $E_c \\sim 0.4$ kV/mm, suspensions obtained by dispersing particles of the synthetic clay fluoro-hectorite in a silicon oil, aggregate into chain- and/or column-like structures parallel to the applied electric field. This micro-structuring results in a transition in the suspensions' rheological behavior, from a Newtonian-like behavior to a shear-thinning rheology with a significant yield stress. This behavior is studied as a function of particle volume fraction and strength of the applied electric field, $E$. The steady shear flow curves are observed to scale onto a master curve with respect to $E$, in a manner similar to what was recently found for suspensions of laponite clay [42]. In the case of Na-fluorohectorite, the corresponding dynamic yield stress is demonstrated to scale with respect to $E$ as a power law with an exponent $\\alpha \\sim 1.93$, while the static yield stress inferred from constant shear stress tests exhibits a similar behavior with $\\alpha \\sim 1.58$. The suspensions are also studied in the framework of thixotropic fluids: the bifurcation in the rheology behavior when letting the system flow and evolve under a constant applied shear stress is characterized, and a bifurcation yield stress, estimated as the applied shear stress at which viscosity bifurcation occurs, is measured to scale as $E^\\alpha$ with $\\alpha \\sim 0.5$ to 0.6. All measured yield stresses increase with the particle fraction $\\Phi$ of the suspension. For the static yield stress, a scaling law $\\Phi^\\beta$, with $\\beta = 0.54$, is found. The results are found to be reasonably consistent with each other. Their similarities with-, and discrepancies to- results obtained on laponite-oil suspensions are discussed.
Chaos detection tools: application to a self-consistent triaxial model
Nicolás Maffione; Luciano Darriba; Pablo Cincotta; Claudia Giordano
2012-12-13T23:59:59.000Z
Together with the variational indicators of chaos, the spectral analysis methods have also achieved great popularity in the field of chaos detection. The former are based on the concept of local exponential divergence. The latter are based on the numerical analysis of some particular quantities of a single orbit, e.g. its frequency. In spite of having totally different conceptual bases, they are used for the very same goals such as, for instance, separating the chaotic and the regular component. In fact, we show herein that the variational indicators serve to distinguish both components of a Hamiltonian system in a more reliable fashion than a spectral analysis method does. We study two start spaces for different energy levels of a self-consistent triaxial stellar dynamical model by means of some selected variational indicators and a spectral analysis method. In order to select the appropriate tools for this paper, we extend previous studies where we make a comparison of several variational indicators on different scenarios. Herein, we compare the Average Power Law Exponent (APLE) and an alternative quantity given by the Mean Exponential Growth factor of Neary Orbits (MEGNO): the MEGNO's Slope Estimation of the largest Lyapunov Characteristic Exponent (SElLCE). The spectral analysis method selected for the investigation is the Frequency Modified Fourier Transform (FMFT). Besides a comparative study of the APLE, the Fast Lyapunov Indicator (FLI), the Orthogonal Fast Lyapunov Indicator (OFLI) and the MEGNO/SElLCE, we show that the SElLCE could be an appropriate alternative to the MEGNO when studying large samples of initial conditions. The SElLCE separates the chaotic and the regular components reliably and identifies the different levels of chaoticity. We show that the FMFT is not as reliable as the SElLCE to describe clearly the chaotic domains in the experiments.
Lai, W. N. [Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)] [Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Chapman, S. C. [Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom) [Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Department of Mathematics and Statistics, University of Tromsø, Tromsø (Norway); Dendy, R. O. [Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom) [Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB (United Kingdom)
2013-10-15T23:59:59.000Z
Suprathermal tails in the distributions of electron velocities parallel to the magnetic field are found in many areas of plasma physics, from magnetic confinement fusion to solar system plasmas. Parallel electron kinetic energy can be transferred into plasma waves and perpendicular gyration energy of particles through the anomalous Doppler instability (ADI), provided that energetic electrons with parallel velocities v{sub ||}?(?+?{sub ce})/k{sub ||} are present; here ?{sub ce} denotes electron cyclotron frequency, ? the wave angular frequency, and k{sub ||} the component of wavenumber parallel to the magnetic field. This phenomenon is widely observed in tokamak plasmas. Here, we present the first fully self-consistent relativistic particle-in-cell simulations of the ADI, spanning the linear and nonlinear regimes of the ADI. We test the robustness of the analytical theory in the linear regime and follow the ADI through to the steady state. By directly evaluating the parallel and perpendicular dynamical contributions to j·E in the simulations, we follow the energy transfer between the excited waves and the bulk and tail electron populations for the first time. We find that the ratio ?{sub ce}/(?{sub pe}+?{sub ce}) of energy transfer between parallel and perpendicular, obtained from linear analysis, does not apply when damping is fully included, when we find it to be ?{sub pe}/(?{sub pe}+?{sub ce}); here ?{sub pe} denotes the electron plasma frequency. We also find that the ADI can arise beyond the previously expected range of plasma parameters, in particular when ?{sub ce}>?{sub pe}. The simulations also exhibit a spectral feature which may correspond to the observations of suprathermal narrowband emission at ?{sub pe} detected from low density tokamak plasmas.
Greenberg, Harvey J.
1996-01-01T23:59:59.000Z
Annals of Mathematics and Artificial Intelligence 17 (1996) 37-83 Consistency, redundancy interests in artificial intelligence have recently produced new results. One question is that of consistency by Charnes and Cooper [I01 and the monograph by Glover et al. [41]). They have also arisen in artificial
Helgaker, Trygve
Linear-scaling implementation of molecular response theory in self-consistent field electronic 2007 A linear-scaling implementation of Hartree-Fock and Kohn-Sham self-consistent field theories on a nonredundant exponential parametrization of the one-electron density matrix in the atomic-orbital basis
Marra, J
2006-11-15T23:59:59.000Z
The Department of Energy Office of Environmental Management (DOE/EM) plans to conduct the Plutonium Disposition Project at the Savannah River Site (SRS) to disposition excess weapons-usable plutonium. A plutonium glass waste form is the preferred option for immobilization of the plutonium for subsequent disposition in a geologic repository. A reference glass composition (Lanthanide Borosilicate (LaBS) Frit B) was developed during the Plutonium Immobilization Program (PIP) to immobilize plutonium in the late 1990's. A limited amount of performance testing was performed on this baseline composition before efforts to further pursue Pu disposition via a glass waste form ceased. Recent FY05 studies have further investigated the LaBS Frit B formulation as well as development of a newer LaBS formulation denoted as LaBS Frit X. The objectives of this present task were to fabricate plutonium loaded LaBS Frit X glass and perform corrosion testing to provide near-term data that will increase confidence that LaBS glass product is suitable for disposal in the Yucca Mountain Repository. Specifically, testing was conducted in an effort to provide data to Yucca Mountain Project (YMP) personnel for use in performance assessment calculations. Plutonium containing LaBS glass with the Frit X composition with a 9.5 wt% PuO{sub 2} loading was prepared for testing. Glass was prepared to support Product Consistency Testing (PCT) at Savannah River National Laboratory (SRNL). The glass was thoroughly characterized using x-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS) prior to performance testing. A series of PCTs were conducted at SRNL using quenched Pu Frit X glass with varying exposed surface areas. Effects of isothermal and can-in-canister heat treatments on the Pu Frit X glass were also investigated. Another series of PCTs were performed on these different heat-treated Pu Frit X glasses. Leachates from all these PCTs were analyzed to determine the dissolved concentrations of key elements. Acid stripping of leach vessels was performed to determine the concentration of the glass constituents that may have sorbed on the vessels during leach testing. Additionally, the leachate solutions were ultrafiltered to quantify colloid formation.
Crawford, C; James Marra, J; Ned Bibler, N
2007-02-12T23:59:59.000Z
The Department of Energy Office of Environmental Management (DOE/EM) plans to conduct the Plutonium Disposition Project at the Savannah River Site (SRS) in Aiken, SC, to disposition excess weapons-usable plutonium. A plutonium glass waste form is a leading candidate for immobilization of the plutonium for subsequent disposition in a geologic repository. The objectives of this present task were to fabricate plutonium-loaded lanthanide borosilicate (LaBS) Frit B glass and perform testing to provide near-term data that will increase confidence that LaBS glass product is suitable for disposal in the proposed Federal Repository. Specifically, testing was conducted in an effort to provide data to Yucca Mountain Project (YMP) personnel for use in performance assessment calculations. Plutonium containing LaBS glass with the Frit B composition with a 9.5 wt% PuO{sub 2} loading was prepared for testing. Glass was prepared to support glass durability testing via the ASTM Product Consistency Testing (PCT) at Savannah River National Laboratory (SRNL). The glass was characterized with X-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS) prior to performance testing. This characterization revealed some crystalline PuO{sub 2} inclusions with disk-like morphology present in the as fabricated, quench-cooled glass. A series of PCTs was conducted at SRNL with varying exposed surface area and test durations. Filtered leachates from these tests were analyzed to determine the dissolved concentrations of key elements. The leachate solutions were also ultrafiltered to quantify colloid formation. Leached solids from select PCTs were examined in an attempt to evaluate the Pu and neutron absorber release behavior from the glass and to investigate formation of alteration phases on the glass surface. A series of PCTs was conducted at 90 C in ASTM Type 1 water to compare the Pu LaBS Frit B glass durability to current requirements for High Level Waste (HLW) glass in a geologic repository. The PCT (7-day static test with powdered glass) results on the Pu-containing LaBS Frit B glass at SA/V of {approx} 2000 m{sup -1} showed that the glass was very durable with an average normalized elemental release value for boron of 0.013 g/m{sup 2}. This boron release value is {approx} 640X lower than normalized boron release from current Environmental Assessment (EA) glass used for repository acceptance. The PCT-B (7, 14, 28 and 56-day, static test with powdered glass) normalized elemental releases were similar to the normalized elemental release values from PCT-A testing, indicating that the LaBS Frit B glass is very durable as measured by the PCT. Normalized plutonium releases were essentially the same within the analytical uncertainty of the ICP-MS methods used to quantify plutonium in the 0.45 {micro}m-filtered leachates and ultra-filtered leachates, indicating that colloidal plutonium species do not form under the PCT conditions used in this study.
Marra, J
2006-11-21T23:59:59.000Z
The Department of Energy Office of Environmental Management (DOE/EM) plans to conduct the Plutonium Disposition Project at the Savannah River Site (SRS) to disposition excess weapons-usable plutonium. A plutonium glass waste form is the preferred option for immobilization of the plutonium for subsequent disposition in a geologic repository. A reference glass composition (Lanthanide Borosilicate (LaBS) Frit B) was developed during the Plutonium Immobilization Program (PIP) to immobilize plutonium in the late 1990's. A limited amount of performance testing was performed on this baseline composition before efforts to further pursue Pu disposition via a glass waste form ceased. Recent FY05 studies have further investigated the LaBS Frit B formulation as well as development of a newer LaBS formulation denoted as LaBS Frit X. The objectives of this present task were to fabricate plutonium loaded LaBS Frit X glass and perform corrosion testing to provide near-term data that will increase confidence that LaBS glass product is suitable for disposal in the Yucca Mountain Repository. Specifically, testing was conducted in an effort to provide data to Yucca Mountain Project (YMP) personnel for use in performance assessment calculations. Plutonium containing LaBS glass with the Frit X composition with a 9.5 wt% PuO{sub 2} loading was prepared for testing. Glass was prepared to support Product Consistency Testing (PCT) at Savannah River National Laboratory (SRNL). The glass was thoroughly characterized using x-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS) prior to performance testing. A series of PCTs were conducted at SRNL using quenched Pu Frit X glass with varying exposed surface areas. Effects of isothermal and can-in-canister heat treatments on the Pu Frit X glass were also investigated. Another series of PCTs were performed on these different heat-treated Pu Frit X glasses. Leachates from all these PCTs were analyzed to determine the dissolved concentrations of key elements. Acid stripping of leach vessels was performed to determine the concentration of the glass constituents that may have sorbed on the vessels during leach testing. Additionally, the leachate solutions were ultrafiltered to quantify colloid formation. Characterization of the quenched Pu Frit X glass prior to testing revealed that some crystalline plutonium oxide was present in the glass. The crystalline particles had a disklike morphology and likely formed via coarsening of particles in areas compositionally enriched in plutonium. Similar results had also been observed in previous Pu Frit B studies. Isothermal 1250 C heat-treated Pu Frit X glasses showed two different crystalline phases (PuO{sub 2} and Nd{sub 2}Hf{sub 2}O{sub 7}), as well as a peak shift in the XRD spectra that is likely due to a solid solution phase PuO{sub 2}-HfO{sub 2} formation. Micrographs of this glass showed a clustering of some of the crystalline phases. Pu Frit X glass subjected to the can-in-canister heating profile also displayed the two PuO{sub 2} and Nd{sub 2}Hf{sub 2}O{sub 7} phases from XRD analysis. Additional micrographs indicate crystalline phases in this glass were of varying forms (a spherical PuO{sub 2} phase that appeared to range in size from submicron to {approx}5 micron, a dendritic-type phase that was comprised of mixed lanthanides and plutonium, and a minor phase that contained Pu and Hf), and clustering of the phases was also observed.
Consistent evaluation of GOSAT, SCIAMACHY, carbontracker, and MACC through comparisons to TCCON
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Kulawik, S. S.; Wunch, D.; O'Dell, C.; Frankenberg, C.; Reuter, M.; Oda, T.; Chevallier, F.; Sherlock, V.; Buchwitz, M.; Osterman, G.; et al
2015-06-22T23:59:59.000Z
Consistent validation of satellite CO2 estimates is a prerequisite for using multiple satellite CO2 measurements for joint flux inversion, and for establishing an accurate long-term atmospheric CO2 data record. We focus on validating model and satellite observation attributes that impact flux estimates and CO2 assimilation, including accurate error estimates, correlated and random errors, overall biases, biases by season and latitude, the impact of coincidence criteria, validation of seasonal cycle phase and amplitude, yearly growth, and daily variability. We evaluate dry air mole fraction (XCO2) for GOSAT (ACOS b3.5) and SCIAMACHY (BESD v2.00.08) as well as the CarbonTracker (CT2013b) simulated CO2more »mole fraction fields and the MACC CO2 inversion system (v13.1) and compare these to TCCON observations (GGG2014). We find standard deviations of 0.9 ppm, 0.9, 1.7, and 2.1 ppm versus TCCON for CT2013b, MACC, GOSAT, and SCIAMACHY, respectively, with the single target errors 1.9 and 0.9 times the predicted errors for GOSAT and SCIAMACHY, respectively. When satellite data are averaged and interpreted according to error2 = a2+ b2 /n (where n are the number of observations averaged, a are the systematic (correlated) errors, and b are the random (uncorrelated) errors), we find that the correlated error term a = 0.6 ppm and the uncorrelated error term b = 1.7 ppm for GOSAT and a = 1.0 ppm, b = 1.4 ppm for SCIAMACHY regional averages. Biases at individual stations have year-to-year variability of ~ 0.3 ppm, with biases larger than the TCCON predicted bias uncertainty of 0.4 ppm at many stations. Using fitting software, we find that GOSAT underpredicts the seasonal cycle amplitude in the Northern Hemisphere (NH) between 46–53° N. In the Southern Hemisphere (SH), CT2013b underestimates the seasonal cycle amplitude. Biases are calculated for 3-month intervals and indicate the months that contribute to the observed amplitude differences. The seasonal cycle phase indicates whether a dataset or model lags another dataset in time. We calculate this at a subset of stations where there is adequate satellite data, and find that the GOSAT retrieved phase improves substantially over the prior and the SCIAMACHY retrieved phase improves substantially for 2 of 7 sites. The models reproduce the measured seasonal cycle phase well except for at Lauder125 (CT2013b), Darwin (MACC), and Izana (+ 10 days, CT2013b), as for Bremen and Four Corners, which are highly influenced by local effects. We compare the variability within one day between TCCON and models in JJA; there is correlation between 0.2 and 0.8 in the NH, with models showing 10–100 % the variability of TCCON at different stations (except Bremen and Four Corners which have no variability compared to TCCON) and CT2013b showing more variability than MACC. This paper highlights findings that provide inputs to estimate flux errors in model assimilations, and places where models and satellites need further investigation, e.g. the SH for models and 45–67° N for GOSAT« less
PAPER The COMT Val/Met polymorphism is associated with reading- related skills and consistent. In particular, we found that the COMT Val/Met polymorphism at rs4680, which results in the substitution
Cotterill, Stewart T
2007-01-01T23:59:59.000Z
Golfers have been encouraged to develop consistent pre-performance routines (PPRs) in order to enhance their performance. However, the theoretical underpinning of these recommendations is unclear. Issues relating to the ...
Polak, E.
1994-12-31T23:59:59.000Z
Unlike the situation with most other problems, the concept of a solution to an optimization problem is not unique, since it includes global solutions, local solutions, and stationary points. Earlier definitions of a consistent approximation to an optimization problem were in terms of properties that ensured that the global minimizers of the approximating problems (as well as uniformly strict local minimizers) converge only to global minimizers (local minimizers) of the original problems. Our definition of a consistent approximation addresses the properties not only of global and local solutions of the approximating problems, but also of their stationary points. Hence we always consider a pair, consisting of an optimization problem and its optimality function, (P, {theta}), with the zeros of the optimality function being the stationary points of P. We define consistency of approximating problem-optimality function pairs, (P{sub N}, {theta}{sub N}) to (P, {theta}), in terms of the epigraphical convergence of the P{sub N} to P, and the hypographical convergence of the optimality functions {theta}{sub N} to {theta}. As a companion to the characterization of consistent approximations, we will present two types of {open_quotes}diagonalization{close_quotes} techniques for using consistent approximations and {open_quotes}hot starts{close_quotes} in obtaining an approximate solution of the original problems. The first is a {open_quotes}filter{close_quotes} type technique, similar to that used in conjunction with penalty functions, the second one is an adaptive discretization technique with nicer convergence properties. We will illustrate the use of our concept of consistent approximations with examples from semi-infinite optimization, optimal control, and shape optimization.
Reflection and Transmission of Pulsed Electromagnetic Fields through Multilayered
Oughstun, Kurt
Reflection and Transmission of Pulsed Electromagnetic Fields through Multilayered Biological Media- cally rigorous, physically correct description of the propagation of pulsed electromagnetic fields pulses through multilayered biological media consisting of three biological tissue layers rep- resenting
Graciela Gelmini; Alexander Kusenko
1999-05-17T23:59:59.000Z
Relic neutrinos with mass 0.07 (+0.02/-0.04) eV, in the range consistent with Super-Kamiokande data, can explain the cosmic rays with energies in excess of the Greisen-Zatsepin-Kuzmin cutoff. The spectrum of ultra-high energy cosmic rays produced in this fashion has some distinctive features that may help identify their origin. Our mechanism does not require but is consistent with a neutrino density high enough to be a new kind of hot dark matter.
Doros N. Theodorou; Georgios G. Vogiatzis; Georgios Kritikos
2015-02-20T23:59:59.000Z
A method is formulated, based on combining self-consistent field theory with dynamically corrected transition state theory, for estimating the rates of adsorption and desorption of end-constrained chains (e.g. by crosslinks or entanglements) from a polymer melt onto a solid substrate. This approach is tested on a polyethylene/graphite system, where the whole methodology is parametrized by atomistically detailed molecular simulations. For short-chain melts, which can still be addressed by molecular dynamics simulations with reasonable computational resources, the self-consistent field approach gives predictions of the adsorption and desorption rate constants which are gratifyingly close to molecular dynamics estimates.
Utah, University of
Application of phase consistency to improve time efficiency and image quality in dual echo black-blood significant potential for improving noninvasive imaging of blood vessels and enabling better assessment of the degree and nature of vascular disease. Black-blood MRA techniques [18], in which the signal from flowing
Lai, Hong-jian
Abstract-The distribution network reconfiguration is a process that consists of changing the status of the numerous combinations of candidate switches. A multi-agent based system for distribution network Edison (SCE). Index Terms- Smart Distribution Network, Fault Reconfiguration, Graph Theory, Multi
Meagher, Mary
Density Measurement Worksheet. Use this sheet to determine if your formula is consistent with the known densities of various compounds. Formula : Formula weight : _______________ (FW) Unit Cell Volume :______________ (V) Probable Z value for your Laue symmetry (based on the unit cell: table 1) : ______ (Z) Formula V
Consistency in Scalable Systems M. I. Ruiz-Fuertes, M. R. Pallardo-Lozoya, F. D. Mu~noz-Escoi
Muñoz, Francesc
Consistency in Scalable Systems M. I. Ruiz-Fuertes, M. R. Pallard´o-Lozoya, F. D. Mu~noz-Esco Systems M. I. Ruiz-Fuertes, M. R. Pallard´o-Lozoya, F. D. Mu~noz-Esco´i Instituto Universitario Mixto
Torres, Rodolfo
Mathematics 122 - Gateway Exam - Fall 96 The Gateway exam will consist of ten randomly nine pro* *blems without any mistakes. You need not simplify your answers, but if you do, the si* *m- plification must be error-free. If you fail to pass the exam you will be allow* *ed to retake it. When you
Damaschke, Peter
Advanced Algorithms 2012. Exam Questions This take-home exam consists of a number of summarizing to avoid failure. Help: You must do the exam completely on your own. Neither group work nor help from = X Y , and every Si in the given set family has exactly two elements: one from X and one from Y
Hu, Wen-Chen
MICS 2007 Robot Contest The robot contest will consist of two (two weight classes) sumo-robot the number of entries). In a sumo-robot match, two autonomously-controlled robots try to push each other outside of a round ring. This may sound destructive, but any harmful behavior by a robot, whether
Initial Simulation Results of Storm-Time Ring Current in a Self-Consistent Magnetic Field Model
Lyons, Larry
, and electrons. The ring current is greatly intensified during geomagnetic storms, and produces large measurement of the magnetic disturbances from all magnetospheric currents on the surface of the EarthInitial Simulation Results of Storm-Time Ring Current in a Self-Consistent Magnetic Field Model S
Harms, Kyle E.
INTRODUCTION Portland cement concrete (PCC) is the world's most versatile and utilized construction material. Modern concrete consists of six main ingredients: coarse aggregate, sand, portland cement sustainability has risen, engineers have looked to alternative binders such as fly ash, silica fume, slag cement
Tipple, Brett
Data Management Plan (p. 1 of 2) The proposed project will include human subjects data consisting the characteristics of the subject population. The demographic data will be recorded electronically. All experimental to deidentify the subjects (see below). Data Preservation and Access The data to be acquired in the proposed
Muradoglu, Metin
and pollution are directly related to the conversion of chemical energy into thermal energy via combustion Available online 10 September 2014 Keywords: PDF methods Consistent hybrid method Turbulent combustion Bluff rights reserved. 1. Introduction Turbulent combustion continues to be a key technology in energy
8th International Conference on Product Lifecycle Management 1 The Cone-BOM model for consistent and
Paris-Sud XI, Université de
8th International Conference on Product Lifecycle Management 1 The Cone-BOM model for consistent as one of the major open issues in the field of Product Lifecycle Management. Especially, the BOM representation', 8th Int. Conf. Product Lifecycle Management. 1 Introduction Product Lifecycle Management (PLM
Thomas D. Cohen
2007-11-16T23:59:59.000Z
This is a response to the comment, arXiv:0709.4651. It is noted that while the comment raises an extremely interesting and subtle point, the original conclusion that theoretically consistent exceptions exist for the proposed general bound for the ratio of shear viscosity to entropy density, appears to remain unaffected by the issue raised.
LBNL-57600/CBP Note-698 Initial Self-Consistent 3D Electron-Cloud Simulations of the LHC Beam with
Furman, Miguel
LBNL-57600/CBP Note-698 Initial Self-Consistent 3D Electron-Cloud Simulations of the LHC Beam lattice elements are realistically modeled, as is the beam and the electron cloud dynamics. The simulated of the electron cloud, represented by macroparticles, under the action of successive bunch passages of the beam
Buck, John W.; McDonald, John P.; Taira, Randal Y.
2002-11-01T23:59:59.000Z
To support cleanup and closure of these tanks, modeling is performed to understand and predict potential impacts to human health and the environment. Pacific Northwest National Laboratory developed a screening tool for the United States Department of Energy, Office of River Protection that estimates the long-term human health risk, from a strategic planning perspective, posed by potential tank releases to the environment. This tool is being conditioned to more detailed model analyses to ensure consistency between studies and to provide scientific defensibility. Once the conditioning is complete, the system will be used to screen alternative cleanup and closure strategies. The integration of screening and detailed models provides consistent analyses, efficiencies in resources, and positive feedback between the various modeling groups. This approach of conditioning a screening methodology to more detailed analyses provides decision-makers with timely and defensible information and increases confidence in the results on the part of clients, regulators, and stakeholders.
Benes, Petr [IEAP, Czech Technical University (Czech Republic); Simkovic, Fedor [Department of Nuclear Physics and Biophysics, Comenius University, Mlynska dolina, SK-84248 Bratislava (Slovakia); Bogolyubov Laboratory of Theoretical Physics, JINR, Dubna (Russian Federation)
2009-11-09T23:59:59.000Z
The nuclear matrix elements M{sup 0v} of the neutrinoless double beta decay (0v{beta}{beta}-decay) are systematically evaluated using the self-consistent renormalized quasiparticle random phase approximation (SRQRPA). The residual interaction and the two-nucleon short-range correlations are derived from the charge-dependent Bonn (CD-Bonn) potential. The importance of further progress in the calculation of the 0v{beta}{beta}-decay nuclear matrix elements is stressed.
California at Berkeley, University of
A Proposal for a UPC Memory Consistency Model, v1.0 Lawrence Berkeley National Lab Tech Report LBNL shared read, denoted RR(l,v) . a relaxed shared write, denoted RW(l,v) . a private read, denoted PR in M . RW (M) is the set of relaxed shared writes in M . PR(M) is the set of private reads in M . PW (M
California at Berkeley, University of
A Proposal for a UPC Memory Consistency Model, v1.0 Lawrence Berkeley National Lab Tech Report LBNL shared read, denoted RR(l,v) · a relaxed shared write, denoted RW(l,v) · a private read, denoted PR in M · RW(M) is the set of relaxed shared writes in M · PR(M) is the set of private reads in M · PW
Zhang, Jie; Ni, Ming-Jiu, E-mail: mjni@ucas.ac.cn
2014-01-01T23:59:59.000Z
The numerical simulation of Magnetohydrodynamics (MHD) flows with complex boundaries has been a topic of great interest in the development of a fusion reactor blanket for the difficulty to accurately simulate the Hartmann layers and side layers along arbitrary geometries. An adaptive version of a consistent and conservative scheme has been developed for simulating the MHD flows. Besides, the present study forms the first attempt to apply the cut-cell approach for irregular wall-bounded MHD flows, which is more flexible and conveniently implemented under adaptive mesh refinement (AMR) technique. It employs a Volume-of-Fluid (VOF) approach to represent the fluid–conducting wall interface that makes it possible to solve the fluid–solid coupling magnetic problems, emphasizing at how electric field solver is implemented when conductivity is discontinuous in cut-cell. For the irregular cut-cells, the conservative interpolation technique is applied to calculate the Lorentz force at cell-center. On the other hand, it will be shown how consistent and conservative scheme is implemented on fine/coarse mesh boundaries when using AMR technique. Then, the applied numerical schemes are validated by five test simulations and excellent agreement was obtained for all the cases considered, simultaneously showed good consistency and conservative properties.
Mason, R.J.
1982-01-01T23:59:59.000Z
The ANTHEM code for the study of CO/sub 2/-laser-generated transport is outlined. ANTHEM treats the background plasma as coupled Eulerian thermal and ion fluids, and the suprathermal electrons as either a third fluid or a body of evolving collisional PIC particles. The electrons scatter off the ions; the suprathermals drag against the thermal background. Self-consistent E- and B-fields are computed by the Implicit Moment Method. The current status of the code is described. Typical output from ANTHEM is discussed with special application to Augmented-Return-Current CO/sub 2/-laser-driven targets.
Popov, Pavel P., E-mail: ppopov@uci.edu; Pope, Stephen B.
2014-01-15T23:59:59.000Z
This work addresses the issue of particle mass consistency in Large Eddy Simulation/Probability Density Function (LES/PDF) methods for turbulent reactive flows. Numerical schemes for the implicit and explicit enforcement of particle mass consistency (PMC) are introduced, and their performance is examined in a representative LES/PDF application, namely the Sandia–Sydney Bluff-Body flame HM1. A new combination of interpolation schemes for velocity and scalar fields is found to better satisfy PMC than multilinear and fourth-order Lagrangian interpolation. A second-order accurate time-stepping scheme for stochastic differential equations (SDE) is found to improve PMC relative to Euler time stepping, which is the first time that a second-order scheme is found to be beneficial, when compared to a first-order scheme, in an LES/PDF application. An explicit corrective velocity scheme for PMC enforcement is introduced, and its parameters optimized to enforce a specified PMC criterion with minimal corrective velocity magnitudes.
Satoshi X. Nakamura; Anders Gardestig
2009-11-10T23:59:59.000Z
In nuclear chiral perturbation theory (ChPT), an operator is defined in a space with a cutoff which may be varied within a certain range. The operator runs as a result of the variation of the cutoff [renormalization group (RG) running]. In order for ChPT to be useful, the operator should run in a way consistent with the counting rule; that is, the running of chiral counter terms have to be of natural size. We vary the cutoff using the Wilsonian renormalization group (WRG) equation, and examine this consistency. As an example, we study the s-wave pion production operator for NN\\to d pi, derived in ChPT. We demonstrate that the WRG running does not generate any chiral-symmetry-violating (CSV) interaction, provided that we start with an operator which does not contain a CSV term. We analytically show how the counter terms are generated in the WRG running in case of the infinitesimal cutoff reduction. Based on the analytic result, we argue a range of the cutoff variation for which the running of the counter terms is of natural size. Then, we numerically confirm this.
Peter Degenfeld-Schonburg; Carlos Navarrete-Benlloch; Michael J. Hartmann
2015-03-11T23:59:59.000Z
Nonlinear quantum optical systems are of paramount relevance for modern quantum technologies, as well as for the study of dissipative phase transitions. Their nonlinear nature makes their theoretical study very challenging and hence they have always served as great motivation to develop new techniques for the analysis of open quantum systems. In this article we apply the recently developed self-consistent projection operator theory to the degenerate optical parametric oscillator to exemplify its general applicability to quantum optical systems. We show that this theory provides an efficient method to calculate the full quantum state of each mode with high degree of accuracy, even at the critical point. It is equally successful in describing both the stationary limit and the dynamics, including regions of the parameter space where the numerical integration of the full problem is significantly less efficient. We further develop a Gaussian approach consistent with our theory, which yields sensibly better results than the previous Gaussian methods developed for this system, most notably standard linearization techniques.
Richard W. Haymaker; Takayuki Matsuki
2003-10-07T23:59:59.000Z
Through the use of a lattice U(1) Ward-Takahashi identity, one can find a precise definition of flux and electric four-current that does not rely on the continuum limit. The magnetic four-current defined for example by the DeGrand-Toussaint construction introduces order a^2 errors in the field distributions. We advocate using a single definition of flux in order to be consistent with both the electric and magnetic Maxwell's equations at any lattice spacing. In a U(1) theory the monopoles are slightly smeared by this choice, i.e. are no longer associated with a single lattice cube. In Abelian projected SU(2) the consistent definition suggests further modifications. For simulations in the scaling window, we do not foresee large changes in the standard analysis of the dual Abrikosov vortex in the maximal Abelian gauge because the order a^2 corrections have small fluctuations and tend to cancel out. However in other gauges, the consequences of our definitions could lead to large effects which may help in understanding the choice of gauge. We also examine the effect of truncating all monopoles except for the dominant cluster on the profile of the dual Abrikosov vortex.
Chin-Yet Lin; Michael Schick; David Andelman
2005-03-02T23:59:59.000Z
We study the phase behavior of diblock copolymers in presence of an external electric field. We employ self-consistent field theory and treat the relevant Maxwell equation as an additional self-consistent equation. Because we do not treat the electric field perturbatively, we can examine its effects even when its magnitude is large. The electric field couples to the system's morphology only through the difference between the dielectric constants of the two blocks. We find that an external field aligns a body-centered cubic phase along the (111) direction, reducing its symmetry group to $R{\\bar 3}m$. Transitions between this phase and the disordered or hexagonal phases can occur for external electric fields ranging from a minimum to a maximum value beyond which the $R{\\bar 3m}$ phase disappears completely. This electric-field range depends on diblock architecture and temperature. We present several cuts through the phase diagram in the space of temperature, architecture and applied field, including one applicable to a system recently studied.
Heng, Kevin; Tsai, Shang-Min
2015-01-01T23:59:59.000Z
We present a self-consistent formalism for computing and understanding the atmospheric chemistry of exoplanets. Starting from the first law of thermodynamics, we demonstrate that the van't Hoff equation (which describes the equilibrium constant), Arrhenius equation (which describes the rate coefficients) and procedures associated with the Gibbs free energy (minimisation, rescaling) have a common physical and mathematical origin. We correct an ambiguity associated with the equilibrium constant, which is used to relate the forward and reverse rate coefficients, and rigorously derive its two definitions. By necessity, one of the equilibrium constants must be dimensionless and equate to an exponential function involving the Gibbs free energy, while the other is a ratio of rate coefficients and must therefore possess physical units. To avoid confusion, we simply term them the dimensionless and dimensional equilibrium constants. We demonstrate that the Arrhenius equation takes on a functional form that is more gene...
Orlando, Roberto, E-mail: roberto.orlando@unito.it; Erba, Alessandro; Dovesi, Roberto [Dipartimento di Chimica, Università di Torino and NIS, Nanostructured Interfaces and Surfaces, Centre of Excellence, Via P. Giuria 7, 10125 Torino (Italy); De La Pierre, Marco [Dipartimento di Chimica, Università di Torino and NIS, Nanostructured Interfaces and Surfaces, Centre of Excellence, Via P. Giuria 7, 10125 Torino (Italy); Nanochemistry Research Institute, Department of Chemistry, Curtin University, GPO Box U1987, Perth, WA 6845 (Australia); Zicovich-Wilson, Claudio M. [Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Av. Universidad, 1001, Col. Chamilpa, 62209 Cuernavaca (Morelos) (Mexico)
2014-09-14T23:59:59.000Z
Use of symmetry can dramatically reduce the computational cost (running time and memory allocation) of self-consistent-field ab initio calculations for molecular and crystalline systems. Crucial for running time is symmetry exploitation in the evaluation of one- and two-electron integrals, diagonalization of the Fock matrix at selected points in reciprocal space, reconstruction of the density matrix. As regards memory allocation, full square matrices (overlap, Fock, and density) in the Atomic Orbital (AO) basis are avoided and a direct transformation from the packed AO to the symmetry adapted crystalline orbital basis is performed, so that the largest matrix to be handled has the size of the largest sub-block in the latter basis. Quantitative examples, referring to the implementation in the CRYSTAL code, are given for high symmetry families of compounds such as carbon fullerenes and nanotubes.
Welden, Alicia Rae; Zgid, Dominika
2015-01-01T23:59:59.000Z
One-body Green's function theories implemented on the real frequency axis offer a natural formalism for the unbiased theoretical determination of quasiparticle spectra in molecules and solids. Self-consistent Green's function methods employing the imaginary axis formalism on the other hand can benefit from the iterative implicit resummation of higher order diagrams that are not included when only the first iteration is performed. Unfortunately, the imaginary axis Green's function does not give direct access to the desired quasiparticle spectra, which undermines its utility. To this end we investigate how reliably one can calculate quasiparticle spectra from the Extended Koopmans' Theorem (EKT) applied to the imaginary time Green's function in a second order approximation (GF2). We find that EKT in conjunction with GF2 yields IPs and EAs that systematically underestimate experimental and accurate coupled-cluster reference values for a variety of molecules and atoms. This establishes that the EKT allows one to ...
Challacombe, Matt [Los Alamos National Laboratory
2009-01-01T23:59:59.000Z
An algorithm for solution of the Time-Dependent Self-Consistent-Field (TD-SCF) equations is developed, based on dual solution channels for non-linear optimization of the Tsiper functional [J.Phys.B, 34 L401 (2001)]. This formulation poses the TD-SCF problem as two Rayleigh quotients, coupled weakly through biorthogonality. Convergence rates for the Random Phase Approximation (RPA) are found to be equivalent to the Tamm-Dancoff approximation (TDA). Moreover, the variational nature of the quotient is robust to approximation errors, allowing linear scaling solution to the bulk limit of the RPA matrix-eigenvalue and exchange operator problem for molecular wires with extended conjugation, including polyphenylene vinylene and the (4,3) nanotube.
S. Bhattacharyya; N. Bhatt; R. Misra
2006-06-07T23:59:59.000Z
In the inner regions of an accretion disk around a black hole, relativistic protons can interact with ambient matter to produce electrons, positrons and $\\gamma$-rays. The resultant steady state electron and positron particle distributions are self-consistently computed taking into account Coulomb and Compton cooling, $e^-e^+$ pair production (due to $\\gamma-\\gamma$ annihilation) and pair annihilation. While earlier works used the diffusion approximation to obtain the particle distributions, here we solve a more general integro-differential equation that correctly takes into account the large change in particle energy that occur when the leptons Compton scatter off hard X-rays. Thus this formalism can also be applied to the hard state of black hole systems, where the dominant ambient photons are hard X-rays. The corresponding photon energy spectrum is calculated and compared with broadband data of black hole binaries in different spectral states. The results indicate that the $\\gamma$-ray spectra ($E > 0.8$ MeV) of both the soft and hard spectral states and the entire hard X-ray/$\\gamma$-ray spectrum of the ultra-soft state, could be due to $p-p$ interactions. These results are consistent with the hypothesis that there always exists in these systems a $\\gamma$-ray spectral component due to $p-p$ interactions which can contribute between 0.5 to 10% of the total bolometric luminosty. The model predicts that {\\it GLAST} would be able to detect black hole binaries and provide evidence for the presence of non-thermal protons which in turn would give insight into the energy dissipation process and jet formation in these systems.
Feng, Ranran; Guo, Yuan; Lu, Rong; Velarde Ruiz Esparza, Luis A.; Wang, Hongfei
2011-06-16T23:59:59.000Z
Tremendous progresses have been made in quantitative understanding and interpretation of the hydrogen bonding and ordering structure at the air/water interface since the first sum-frequency generation vibrational spectroscopy (SFG-VS) measurement on the neat air/water interface by Q. Du et al. in 1993 (PRL, 70, 2312-2316, 1993.). However, there are still disagreements and controversies on the consistency between the different experiment measurements and the theoretical computational results. One critical problem lies in the inconsistency between the SFG-VS intensity measurements and the recently developed SFG-VS phase spectra measurements of the neat air/water interface, which has inspired various theoretical efforts trying to understand them. In this report, the reliability of the SFG-VS intensity spectra of the neat air/water interface is to be quantitatively examined, and the sources of possible inaccuracies in the SFG-VS phase spectral measurement is to be discussed based on the non-resonant SHG phase measurement results. The conclusion is that the SFG-VS intensity spectra data from different laboratories are now quantitatively converging and in agreement with each other, and the possible inaccuracies and inconsistencies in the SFG-VS phase spectra measurements need to be carefully examined against the properly corrected phase standard.
Batista, Enrique R [Los Alamos National Laboratory; Sproviero, Eduardo M [YALE UNIV; Newcomer, Michael [YALE UNIV; Gascon, Jose A [YALE UNIV; Batista, Victor S [YALE UNIV
2008-01-01T23:59:59.000Z
The combination of quantum mechanics and molecular mechanics (QM/MM) is one of the most promising approaches to study the structure, function, and properties of proteins and nucleic acids. However, there some instances in which the limitations of either the MM (lack of a proper electronic description) or QM (limited to a few number of atoms) methods prevent a proper description of the system. To address this issue, we review here our approach to fine-tune the structure of biological systems using post-QM/MM refinements. These protocols are based on spectroscopy data, and/or partitioning of the system to extend the QM description to a larger region of a protein. We illustrate these methodologies through applications to several biomolecules, which were pre-optimized at the QM/MM level and then further refined using postQM/MM refinement methodologies: mod(QM/MM), which refines the atomic charges of the residues included in the MM region accounting for polarization effects; mod(QM/MM)-opt that partition the MM region in smaller parts and optimizes each part in an iterative. self-consistent way, and the Polarized-Extended X-Ray Absorption Fine Structure (P-EXAFS) fitting procedure, which fine-tune the atomic coordinates to reproduce experimental polarized EXAFS spectra. The first two techniques were applied to the guanine quadruplex. while the P-EXAFS refinement was applied to the oxygen evolving complex of photosystem II.
G. Co'; V. De Donno; M. Anguiano; R. N. Bernard; A. M. Lallena
2015-09-08T23:59:59.000Z
We present a model which describes the properties of odd-even nuclei with one nucleon more, or less, with respect to the magic number. In addition to the effects related to the unpaired nucleon, we consider those produced by the excitation of the closed shell core. By using a single particle basis generated with Hartree-Fock calculations, we describe the polarization of the doubly magic-core with Random Phase Approximation collective wave functions. In every step of the calculation, and for all the nuclei considered, we use the same finite-range nucleon-nucleon interaction. We apply our model to the evaluation of electric quadrupole and magnetic dipole moments of odd-even nuclei around oxygen, calcium, zirconium, tin and lead isotopes. Our Random Phase Approximation description of the polarization of the core improves the agreement with experimental data with respect to the predictions of the independent particle model. We compare our results with those obtained in first-order perturbation theory, with those produced by Hartree-Fock-Bogolioubov calculations and with those generated within the Landau-Migdal theory of finite Fermi systems. The results of our universal, self-consistent, and parameter free approach have the same quality of those obtained with phenomenological approaches where the various terms of the nucleon-nucleon interaction are adapted to reproduce some specific experimental data. A critical discussion on the validity of the model is presented.
Noble, Pascal
2012-01-01T23:59:59.000Z
In this paper we derive consistent shallow water equations for thin films of power law fluids down an incline. These models account for the streamwise diffusion of momentum which is important to describe accurately the full dynamic of the thin film flows when instabilities like roll-waves arise. These models are validated through a comparison with Orr Sommerfeld equations for large scale perturbations. We only consider laminar flow for which the boundary layer issued from the interaction of the flow with the bottom surface has an influence all over the transverse direction to the flow. In this case the concept itself of thin film and its relation with long wave asymptotic leads naturally to flow conditions around a uniform free surface Poiseuille flow. The apparent viscosity diverges at the free surface which, in turn, introduces a singularity in the formulation of the Orr-Sommerfeld equations and in the derivation of shallow water models. We remove this singularity by introducing a weaker formulation of Cauc...
Chen, Zhaoquan, E-mail: zqchen@aust.edu.cn [Faculty of Physics, St. Petersburg State University, St. Petersburg 198504 (Russian Federation); College of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001 (China); Yin, Zhixiang, E-mail: zxyin66@163.com; Chen, Minggong; Hong, Lingli; Hu, Yelin; Huang, Yourui [College of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001 (China); Xia, Guangqing; Liu, Minghai [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Kudryavtsev, A. A. [Faculty of Physics, St. Petersburg State University, St. Petersburg 198504 (Russian Federation)
2014-10-21T23:59:59.000Z
In present study, a pulsed lower-power microwave-driven atmospheric-pressure argon plasma jet has been introduced with the type of coaxial transmission line resonator. The plasma jet plume is with room air temperature, even can be directly touched by human body without any hot harm. In order to study ionization process of the proposed plasma jet, a self-consistent hybrid fluid model is constructed in which Maxwell's equations are solved numerically by finite-difference time-domain method and a fluid model is used to study the characteristics of argon plasma evolution. With a Guass type input power function, the spatio-temporal distributions of the electron density, the electron temperature, the electric field, and the absorbed power density have been simulated, respectively. The simulation results suggest that the peak values of the electron temperature and the electric field are synchronous with the input pulsed microwave power but the maximum quantities of the electron density and the absorbed power density are lagged to the microwave power excitation. In addition, the pulsed plasma jet excited by the local enhanced electric field of surface plasmon polaritons should be the discharge mechanism of the proposed plasma jet.
Miyagi, Haruhide; Bojer Madsen, Lars [Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C (Denmark)] [Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C (Denmark)
2014-04-28T23:59:59.000Z
The time-dependent restricted-active-space self-consistent-field singles (TD-RASSCF-S) method is presented for investigating TD many-electron dynamics in atoms and molecules. Adopting the SCF notion from the muticonfigurational TD Hartree-Fock (MCTDHF) method and the RAS scheme (single-orbital excitation concept) from the TD configuration-interaction singles (TDCIS) method, the TD-RASSCF-S method can be regarded as a hybrid of them. We prove that, for closed-shell N{sub e}-electron systems, the TD-RASSCF-S wave function can be fully converged using only N{sub e}/2 + 1 ? M ? N{sub e} spatial orbitals. Importantly, based on the TD variational principle, the converged TD-RASSCF-S wave function with M = N{sub e} is more accurate than the TDCIS wave function. The accuracy of the TD-RASSCF-S approach over the TDCIS is illustrated by the calculation of high-order harmonic generation spectra for one-dimensional models of atomic helium, beryllium, and carbon in an intense laser pulse. The electronic dynamics during the process is investigated by analyzing the behavior of electron density and orbitals. The TD-RASSCF-S method is accurate, numerically tractable, and applicable for large systems beyond the capability of the MCTDHF method.
D. Bianco; F. Knapp; N. Lo Iudice; P. Vesely; F. Andreozzi; G. De Gregorio; A. Porrino
2014-12-05T23:59:59.000Z
The multipole response of neutron rich O and Sn isotopes is computed in Tamm-Dancoff and random-phase approximations using the canonical Hartree-Fock-Bogoliubov quasi-particle basis. The calculations are performed using an intrinsic Hamiltonian composed of a $V_{lowk}$ potential, deduced from the CD-Bonn nucleon-nucleon interaction, corrected with phenomenological density dependent and spin-orbit terms. The effect of these two pieces on energies and multipole responses is discussed. The problem of removing the spurious admixtures induced by the center of mass motion and by the violation of the number of particles is investigated. The differences between the two theoretical approaches are discussed quantitatively. Attention is then focused on the dipole strength distribution, including the low-lying transitions associated to the pygmy resonance. Monopole and quadrupole responses are also briefly investigated. A detailed comparison with the available experimental spectra contributes to clarify the extent of validity of the two self-consistent approaches.
Guest, Geoffrey, E-mail: geoffrey.guest@ntnu.no; Bright, Ryan M., E-mail: ryan.m.bright@ntnu.no; Cherubini, Francesco, E-mail: francesco.cherubini@ntnu.no; Strømman, Anders H., E-mail: anders.hammer.stromman@ntnu.no
2013-11-15T23:59:59.000Z
Temporary and permanent carbon storage from biogenic sources is seen as a way to mitigate climate change. The aim of this work is to illustrate the need to harmonize the quantification of such mitigation across all possible storage pools in the bio- and anthroposphere. We investigate nine alternative storage cases and a wide array of bio-resource pools: from annual crops, short rotation woody crops, medium rotation temperate forests, and long rotation boreal forests. For each feedstock type and biogenic carbon storage pool, we quantify the carbon cycle climate impact due to the skewed time distribution between emission and sequestration fluxes in the bio- and anthroposphere. Additional consideration of the climate impact from albedo changes in forests is also illustrated for the boreal forest case. When characterizing climate impact with global warming potentials (GWP), we find a large variance in results which is attributed to different combinations of biomass storage and feedstock systems. The storage of biogenic carbon in any storage pool does not always confer climate benefits: even when biogenic carbon is stored long-term in durable product pools, the climate outcome may still be undesirable when the carbon is sourced from slow-growing biomass feedstock. For example, when biogenic carbon from Norway Spruce from Norway is stored in furniture with a mean life time of 43 years, a climate change impact of 0.08 kg CO{sub 2}eq per kg CO{sub 2} stored (100 year time horizon (TH)) would result. It was also found that when biogenic carbon is stored in a pool with negligible leakage to the atmosphere, the resulting GWP factor is not necessarily ? 1 CO{sub 2}eq per kg CO{sub 2} stored. As an example, when biogenic CO{sub 2} from Norway Spruce biomass is stored in geological reservoirs with no leakage, we estimate a GWP of ? 0.56 kg CO{sub 2}eq per kg CO{sub 2} stored (100 year TH) when albedo effects are also included. The large variance in GWPs across the range of resource and carbon storage options considered indicates that more accurate accounting will require case-specific factors derived following the methodological guidelines provided in this and recent manuscripts. -- Highlights: • Climate impacts of stored biogenic carbon (bio-C) are consistently quantified. • Temporary storage of bio-C does not always equate to a climate cooling impact. • 1 unit of bio-C stored over a time horizon does not always equate to ? 1 unit CO{sub 2}eq. • Discrepancies of climate change impact quantification in literature are clarified.
Turbulent dispersal promotes species coexistence
Berkley, Heather A; Kendall, Bruce E.; Mitarai, Satoshi; Siegel, David A
2010-01-01T23:59:59.000Z
motions of the ocean mesoscale are typi?ed by horizontalexact realization of the mesoscale (20–200 km) ?ow ?eld (that determine the realized mesoscale ?ow patterns), but
Keinan, Alon
FACILITIES AND ADMINISTRATIVE (F&A) COST AND IDC RATES The cost of conducting research consists of two broad types of costs direct costs and facilities and administrative costs (F&A), also known as indirect costs. Direct
Cai, Long
the results easy to explore. The novo|seek search box interface allows the user to enter a term (or the production of substances that cause inflammation, such as leukotrienes1. When we entered ALOX5AP as a search a simple view (title, journal and author), a snippet view (a simple view and the search term with flanking
Boyer, Edmond
Estimation of the caesium-137 source term from the Fukushima Daiichi nuclear power plant using during the accident of the Fukushima Daiichi nuclear power plant in March 2011. In Winiarek et al. (2012b source term from the Fukushima Daiichi nuclear power plant using a consistent joint assimilation of air
Ashburn, J R; Ashburn, James R.; Colvert, Paul M.
2006-01-01T23:59:59.000Z
We introduce a Bayesian mean-value approach for ranking all college football teams using only win-loss data. This approach is unique in that the prior distribution necessary to handle undefeated and winless teams is calculated self-consistently. Furthermore, we will show statistics supporting the validity of the prior distribution. Finally, a brief comparison with other football rankings will be presented.
Chiao, Jung-Chih
CIE/USA-DFW Blog Welcome to CIE/USA-DFW Chapter Blog. We consistently update this blog with latest/USA-DFW Blog Blog at WordPress.com. Theme: INove by NeoEase. Page 3 of 4Dr. J.-C. Chiao received Lockheed
Walker, Matthew P.
OPEN COMPUTING FACILITY Group Account Application Form 1. Pick an account name. It must consist of between three and eight lowercase letters (no spaces, numbers, underscores, or other symbols), and it must be based on the group's name or initials. Requested Account Name: 2. Pick a password. The password must
Canet, Léonie
towards personalized chronotherapy treatments. In an article published in the journal Cancer Research studied the toxicity of irinotecan, an anti-cancer drug widely used in the treatment of cancer NATIONAL PRESS RELEASE I PARIS I 18 NOVEMBER 2013 Cancer chronotherapy consists
Virginia Tech
Fluid Mechanics - 1 An oil is used in a heat exchanger. The internal geometry consists of many small diameter tubes of fixed length (mounted in a bundle as indicated in the sketch). The oil is pumped). Assume the steady flow of the oil through each small tube is in the laminar regime. It is proposed
Maróti, Miklós
Wireless Sensor Networks (WSN) consist of small, low-cost, resource-constrained embedded computers, healthcare, structural monitoring and the military among others. Many WSN applications rely on the location as they require no specialized hardware; they use the radio chip readily available on WSN nodes. RSS-based ranging
L o g o S t a n d a r d S #12;The Go Solar California logo consists of both a graphic and a type treatment. The graphic portion of the logo depicts the suns rays in the shape of the word "solar." To reinforce the branding standard of Go Solar California, the logo must be used correctly. In order
Murray, J.A.H.
138 The plant embryo is a relatively simple structure consisting of a primordial shoot and root, whose development is frozen in the form of a seed. Most development of the mature plant takes place post that control the plant cell cycle at a molecular level, and the first attempts have been made to control plant
Boyer, Edmond
1 Connectivity-consistent mapping method for 2D discrete fracture networks1 Delphine Roubinet, Jean, France3 Abstract4 We present a new flow computation method in 2D Discrete Fracture Networks (DFN and approximated by an Equivalent Hydraulic Matrix (EHM) relating heads and flow9 rates discretized on the mesh
Liang, Huizhi "Elly"
Association mining consists of pattern mining and rule generation. The first phase often takes consuming activity that can generate many redundant rules. To improve the quality of association mining in databases, this thesis provides a new technique, granule-based association mining, for knowledge discovery
Arithmetical Foundations Recursion. Evaluation. Consistency
Nabben, Reinhard
µ-recursive maps as partial PR maps and special terminating general recursive maps-- terminating . . . . . . . . . . . . . . . . . . . . . . 66 1.7 Extension by Predicate Abstraction . . . . . . . . . . . 70 2 Partial PR Maps 87 2.1 Theories of Partial PR Maps . . . . . . . . . . . . . . . 88 2.2 Proof of Structure Theorem for Partials
Arithmetical Foundations Recursion. Evaluation. Consistency
Nabben, Reinhard
as partial p. r. maps. Special terminating general recursive maps con- sidered are complexity controlled code evaluation versus termination conditioned soundness and based on this decidability of primitive re Partial Maps 77 3.1 Theory of partial maps . . . . . . . . . . . . . . . . . . 77 3.2 Structure theorem
Lin, M. C., E-mail: mingchiehlin@gmail.com; Lu, P. S. [NanoScience Simulation Laboratory, Fu Jen Catholic University, New Taipei City 24205, Taiwan (China) [NanoScience Simulation Laboratory, Fu Jen Catholic University, New Taipei City 24205, Taiwan (China); Plasma Theory and Simulation Group, Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States); Chang, P. C. [NanoScience Simulation Laboratory, Fu Jen Catholic University, New Taipei City 24205, Taiwan (China) [NanoScience Simulation Laboratory, Fu Jen Catholic University, New Taipei City 24205, Taiwan (China); Plasma Theory and Simulation Group, Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States); Department of Physics, National Taiwan University, Taipei 106, Taiwan (China); Ragan-Kelley, B. [Plasma Theory and Simulation Group, Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States) [Plasma Theory and Simulation Group, Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States); Applied Science and Technology, University of California, Berkeley, California 94720 (United States); Verboncoeur, J. P. [Plasma Theory and Simulation Group, Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States) [Plasma Theory and Simulation Group, Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States); Department of Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan 48824 (United States)
2014-02-15T23:59:59.000Z
Recently, field emission has attracted increasing attention despite the practical limitation that field emitters operate below the Child-Langmuir space charge limit. By introducing counter-streaming ion flow to neutralize the electron charge density, the space charge limited field emission (SCLFE) current can be dramatically enhanced. In this work, we have developed a relativistic self-consistent model for studying the enhancement of SCLFE by a counter-streaming ion current. The maximum enhancement is found when the ion effect is saturated, as shown analytically. The solutions in non-relativistic, intermediate, and ultra-relativistic regimes are obtained and verified with 1-D particle-in-cell simulations. This self-consistent model is general and can also serve as a benchmark or comparison for verification of simulation codes, as well as extension to higher dimensions.
Neklyudov, I M; Fedorova, L I; Poltinin, P Ya
2013-01-01T23:59:59.000Z
The main purpose of research is to determine the influence by the small dispersive coal dust particles of the different fractional consistence on the technical characteristics of the vertical iodine air filter at nuclear power plant. The research on the transport properties of the small dispersive coal dust particles in the granular filtering medium of absorber in the vertical iodine air filter is completed in the case, when the modeled aerodynamic conditions are similar to the real aerodynamic conditions. It is shown that the appearance of the different fractional consistence of small dispersive coal dust particles with the decreasing dimensions down to the micro and nano sizes at the action of the air dust aerosol stream normally results in a significant change of distribution of the small dispersive coal dust particles masses in the granular filtering medium of an absorber in the vertical iodine air filter, changing the vertical iodine air filter aerodynamic characteristics. The precise characterization of...
Robin, C; Arteaga, D Peña; Berger, J -F
2015-01-01T23:59:59.000Z
Although self-consistent multi-configuration methods have been used for decades to address the description of atomic and molecular many-body systems, only a few trials have been made in the context of nuclear structure. This work aims at the development of such an approach to describe in a unified way various types of correlations in nuclei, in a self-consistent manner where the mean-field is improved as correlations are introduced. The goal is to reconcile the usually set apart Shell-Model and Self-Consistent Mean-Field methods. This approach is referred as "variational multiparticle-multihole configuration mixing method". It is based on a double variational principle which yields a set of two coupled equations that determine at the same time the expansion coefficients of the many-body wave function and the single particle states. The formalism is derived and discussed in a general context, starting from a three-body Hamiltonian. Links to existing many-body techniques such as the formalism of Green's functio...
C. Robin; N. Pillet; D. Peña Arteaga; J. -F. Berger
2015-09-29T23:59:59.000Z
Although self-consistent multi-configuration methods have been used for decades to address the description of atomic and molecular many-body systems, only a few trials have been made in the context of nuclear structure. This work aims at the development of such an approach to describe in a unified way various types of correlations in nuclei, in a self-consistent manner where the mean-field is improved as correlations are introduced. The goal is to reconcile the usually set apart Shell-Model and Self-Consistent Mean-Field methods. This approach is referred as "variational multiparticle-multihole configuration mixing method". It is based on a double variational principle which yields a set of two coupled equations that determine at the same time the expansion coefficients of the many-body wave function and the single particle states. The formalism is derived and discussed in a general context, starting from a three-body Hamiltonian. Links to existing many-body techniques such as the formalism of Green's functions are established. First applications are done using the two-body D1S Gogny effective force. The numerical procedure is tested on the $^{12}$C nucleus in order to study the convergence features of the algorithm in different contexts. Ground state properties as well as single-particle quantities are analyzed, and the description of the first $2^+$ state is examined. This study allows to validate our numerical algorithm and leads to encouraging results. In order to test the method further, we will realize in the second article of this serie, a systematic description of more nuclei and observables obtained by applying the newly-developed numerical procedure with the same Gogny force. As raised in the present work, applications of the variational multiparticle-multihole configuration mixing method will however ultimately require the use of an extended and more constrained Gogny force.
HAO, ZD; Hu, Chia-Ren; TING, CS.
1995-01-01T23:59:59.000Z
VOLUME 51, NUMBER 14 1 APRIL 1995-II Consistency between the Lorentz-force independence of the resistive transition in the high-T, superconductors and the standard theory of flux flow Zhidong Hao Tezas Center for Superconductivity, University... 1995 The American Physical Society 9388 BRIEF REPORTS 51 cal model of flux flow. We shall see that these two simple general properties of flux flow can already imply a type of in-plane LFI, without the need to invoke any non-flux- flow mechanisms...
Batista, Enrique; Friesner, Richard A.
2002-07-16T23:59:59.000Z
To ab initio simulate an ionic crystal using a cluster of atoms, one must surround that cluster with point charges. These point charges add the effect of the electrostatic potential of the rest of the crystal on the electronic structure of the quantum cluster. The value of the point charges has to be chosen to reproduce the crystal field in the region of the cluster. In this work, a method to compute the necessary point charges is presented. The algorithm to choose the point charges is an extension of the one presented by Derenzo et al. [J. Chem. Phys. 2000, 112, 2074]. The method consists of a self-consistent loop, fitting in each iteration the value of the point charges to reproduce the electrostatic field, calculated from the quantum simulation, in the region of the cluster. This method was then applied to the study of the (001) basal surface of hematite, R-Fe2O3. As the cluster size is systematically increased, it is shown that to fully converge the electrostatic effect on the electronic structure of the cluster, clusters of the order of 60 atoms are necessary. As a convergence parameter for the cluster to the bulk behavior, we used the ionization energy of the cluster. In the limit of an infinite cluster, we obtained the work function of hematite to be 5.6 eV.
Johnson, S. G.; Adamic, M. L.: DiSanto, T.; Warren, A. R.; Cummings, D. G.; Foulkrod, L.; Goff, K. M.
1999-11-11T23:59:59.000Z
The ceramic waste form produced from the electrometallurgical treatment of sodium bonded spent fuel from the Experimental Breeder Reactor-II was tested using two immersion tests with separate and distinct purposes. The product consistency test is used to assess the consistency of the waste forms produced and thus is an indicator of a well-controlled process. The toxicity characteristic leaching procedure is used to determine whether a substance is to be considered hazardous by the Environmental Protection Agency. The proposed high level waste repository will not be licensed to receive hazardous waste, thus any waste forms destined to be placed there cannot be of a hazardous nature as defined by the Resource Conservation and Recovery Act. Results are presented from the first four fully radioactive ceramic waste forms produced and from seven ceramic waste forms produced from cold surrogate materials. The fully radioactive waste forms are approximately 2 kg in weight and were produced wit h salt used to treat 100 driver subassemblies of spent fuel.
Parail, V; Ambrosino, R; Artaud, J-F; Besseghir, K; Cavinato, M; Corrigan, G; Garcia, J; Garzotti, L; Gribov, Y; Imbeaux, F; Koechl, F; Labate, C V; Lister, J; Litaudon, X; Loarte, A; Maget, P; Mattei, M; McDonald, D; Nardon, E; Saibene, G; Sartori, R; Urban, J
2013-01-01T23:59:59.000Z
Self-consistent transport simulation of ITER scenarios is a very important tool for the exploration of the operational space and for scenario optimisation. It also provides an assessment of the compatibility of developed scenarios (which include fast transient events) with machine constraints, in particular with the poloidal field (PF) coil system, heating and current drive (H&CD), fuelling and particle and energy exhaust systems. This paper discusses results of predictive modelling of all reference ITER scenarios and variants using two suite of linked transport and equilibrium codes. The first suite consisting of the 1.5D core/2D SOL code JINTRAC [1] and the free boundary equilibrium evolution code CREATE-NL [2,3], was mainly used to simulate the inductive D-T reference Scenario-2 with fusion gain Q=10 and its variants in H, D and He (including ITER scenarios with reduced current and toroidal field). The second suite of codes was used mainly for the modelling of hybrid and steady state ITER scenarios. It...
I. M. Neklyudov; O. P. Ledenyov; L. I. Fedorova; P. Ya. Poltinin
2013-02-18T23:59:59.000Z
The main purpose of research is to determine the influence by the small dispersive coal dust particles of the different fractional consistence on the technical characteristics of the vertical iodine air filter at nuclear power plant. The research on the transport properties of the small dispersive coal dust particles in the granular filtering medium of absorber in the vertical iodine air filter is completed in the case, when the modeled aerodynamic conditions are similar to the real aerodynamic conditions. It is shown that the appearance of the different fractional consistence of small dispersive coal dust particles with the decreasing dimensions down to the micro and nano sizes at the action of the air dust aerosol stream normally results in a significant change of distribution of the small dispersive coal dust particles masses in the granular filtering medium of an absorber in the vertical iodine air filter, changing the vertical iodine air filter aerodynamic characteristics. The precise characterization of the aerodynamic resistance of a model of the vertical iodine air filter is completed. The comparative analysis of the technical characteristics of the vertical and horizontal iodine air filters is also made.
Michalowski, M. J.; Dunlop, J. S. [SUPA (Scottish Universities Physics Alliance), Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom); Kamble, A.; Kaplan, D. L. [Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 (United States); Hjorth, J.; Malesani, D.; Fynbo, J. P. U.; Kruehler, T. [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen O (Denmark); Reinfrank, R. F. [CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710 (Australia); Bonavera, L. [Instituto de Fisica de Cantabria, CSIC-Universidad de Cantabria, Avda. de los Castros s/n, E-39005 Santander (Spain); Castro Ceron, J. M. [Department of Radio Astronomy, Madrid Deep Space Communications Complex (INTA-NASA/INSA), Ctra. M-531, km. 7, E-28.294 Robledo de Chavela (Madrid) (Spain); Ibar, E. [UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Garrett, M. A. [Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo (Netherlands); Jakobsson, P. [Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, 107 Reykjavik (Iceland); Levan, A. J. [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Massardi, M. [INAF-Istituto di Radioastronomia, via Gobetti 101, I-40129 Bologna (Italy); Pal, S. [ICRAR, University of Western Australia, 35 Stirling Highway, Crawley, WA (Australia); Sollerman, J. [Oskar Klein Centre, Department of Astronomy, AlbaNova, Stockholm University, SE-10691 Stockholm (Sweden); Tanvir, N. R. [Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH (United Kingdom); Van der Horst, A. J., E-mail: mm@roe.ac.uk [Astronomical Institute 'Anton Pannekoek', University of Amsterdam, Science Park 904, 1098XH Amsterdam (Netherlands); and others
2012-08-20T23:59:59.000Z
The objective of this paper is to determine the level of obscured star formation activity and dust attenuation in a sample of gamma-ray burst (GRB) hosts, and to test the hypothesis that GRB hosts have properties consistent with those of the general star-forming galaxy populations. We present a radio continuum survey of all z < 1 GRB hosts in The Optically Unbiased GRB Host (TOUGH) sample supplemented with radio data for all (mostly pre-Swift) GRB-SN hosts discovered before 2006 October. We present new radio data for 22 objects and have obtained a detection for three of them (GRB 980425, 021211, 031203; none in the TOUGH sample), increasing the number of radio-detected GRB hosts from two to five. The star formation rate (SFR) for the GRB 021211 host of {approx}825 M{sub Sun} yr{sup -1}, the highest ever reported for a GRB host, places it in the category of ultraluminous infrared galaxies. We found that at least {approx}63% of GRB hosts have SFR < 100 M{sub Sun} yr{sup -1} and at most {approx}8% can have SFR > 500 M{sub Sun} yr{sup -1}. For the undetected hosts the mean radio flux (<35 {mu}Jy 3{sigma}) corresponds to an average SFR < 15 M{sub Sun} yr{sup -1}. Moreover, {approx}> 88% of the z {approx}< 1 GRB hosts have ultraviolet dust attenuation A{sub UV} < 6.7 mag (visual attenuation A{sub V} < 3 mag). Hence, we did not find evidence for large dust obscuration in a majority of GRB hosts. Finally, we found that the distributions of SFRs and A{sub UV} of GRB hosts are consistent with those of Lyman break galaxies, H{alpha} emitters at similar redshifts, and of galaxies from cosmological simulations. The similarity of the GRB population with other star-forming galaxies is consistent with the hypothesis that GRBs, a least at z {approx}< 1, trace a large fraction of all star formation, and are therefore less biased indicators than once thought.
Moussa, Jonathan E., E-mail: godotalgorithm@gmail.com [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
2014-01-07T23:59:59.000Z
The random-phase approximation with second-order screened exchange (RPA+SOSEX) is a model of electron correlation energy with two caveats: its accuracy depends on an arbitrary choice of mean field, and it scales as O(n{sup 5}) operations and O(n{sup 3}) memory for n electrons. We derive a new algorithm that reduces its scaling to O(n{sup 3}) operations and O(n{sup 2}) memory using controlled approximations and a new self-consistent field that approximates Brueckner coupled-cluster doubles theory with RPA+SOSEX, referred to as Brueckner RPA theory. The algorithm comparably reduces the scaling of second-order Møller-Plesset perturbation theory with smaller cost prefactors than RPA+SOSEX. Within a semiempirical model, we study H{sub 2} dissociation to test accuracy and H{sub n} rings to verify scaling.
Yi, C-K.; Jo, S-H.; Jin, G-T.; Son, J-E.; Han, M-H.; Ryu, C-K.
2002-09-19T23:59:59.000Z
We see the sorbent reaction performance in a HGD process consisting of a transport desulfurizer and a fluidized regenerator in this study. We have obtained the solid hold-up and solid circulation rate necessary to reach the target desulfurization efficiency. A major obstacle for fluidized- or transport bed sorbent developments is sorbent durability withstanding attrition. Continuous operation only makes similar conditions of real processes such as rapid temperature swing, chemical transformations between sulfidation and regeneration, stresses induced by fluidization and continuous particle circulation between two reactors. Therefore, an integrated system of transport desulfurizer and bubbling regenerator is operated continuously more than 150 hours to see system reliability, sorbent reaction characteristics, sorbent morphology before and after test.
Batista, Enrique R [Los Alamos National Laboratory; Newcomer, Micharel B [YALE UNIV; Raggin, Christina M [YALE UNIV; Gascon, Jose A [YALE UNIV; Loria, J Patrick [YALE UNIV; Batista, Victor S [YALE UNIV
2008-01-01T23:59:59.000Z
This paper generalizes the MoD-QM/MM hybrid method, developed for ab initio computations of protein electrostatic potentials [Gasc6n, l.A.; Leung, S.S.F.; Batista, E.R.; Batista, V.S. J. Chem. Theory Comput. 2006,2, 175-186], as a practical algorithm for structural refinement of extended systems. The computational protocol involves a space-domain decomposition scheme for the formal fragmentation of extended systems into smaller, partially overlapping, molecular domains and the iterative self-consistent energy minimization of the constituent domains by relaxation of their geometry and electronic structure. The method accounts for mutual polarization of the molecular domains, modeled as Quantum-Mechanical (QM) layers embedded in the otherwise classical Molecular-Mechanics (MM) environment according to QM/MM hybrid methods. The method is applied to the description of benchmark models systems that allow for direct comparisons with full QM calculations, and subsequently applied to the structural characterization of the DNA Oxytricha nova Guanine quadruplex (G4). The resulting MoD-QM/MM structural model of the DNA G4 is compared to recently reported highresolution X-ray diffraction and NMR models, and partially validated by direct comparisons between {sup 1}H NMR chemical shifts that are highly sensitive to hydrogen-bonding and stacking interactions and the corresponding theoretical values obtained at the density functional theory DFT QM/MM (BH&H/6-31 G*:Amber) level in conjunction with the gauge independent atomic orbital (GIAO) method for the ab initio self consistent-field (SCF) calculation of NMR chemical shifts.
Jiechen Xu; Jinfeng Liao; Miklos Gyulassy
2015-08-03T23:59:59.000Z
A new model (CUJET3.0) of jet quenching in nuclear collisions coupled to bulk data constrained (VISH2+1D) viscous hydrodynamic backgrounds is constructed by generalizing the perturbative QCD based (CUJET2.0) model to include possible non-perturbative chromodynamical features of the QCD confinement transition near $T_c\\approx 160$ MeV. Two competing mechanisms are considered: (1) the suppression of quark and gluon chromo-electric-charged (cec) degrees of freedom (aka the semi-QGP model of Pisarski et al) and (2) the emergence of chromo-magnetic-monopole (cmm) degrees of freedom (aka the magnetic scenario of Shuryak-Liao). This semi Quark Gluon Monopole Plasma (sQGMP) model depends on two free parameters: (1) the saturating value of the QCD running coupling $\\alpha_c$ below $T_c$ and (2) the ratio $c_m$ of color electric to magnetic screening scales. The value of $\\alpha_c$ is fixed by fitting to a $single$ LHC reference datum, $R^{ch}_{PbPb}(p_T=12{\\rm GeV/c})\\approx 0.3$ for 20-30% centrality. Consistency is then tested by comparing predictions to $all$ $R^h_{AA}(p_T>10{\\rm GeV/c})$, $v^h_2(p_T>10{\\rm GeV/c})$, $h=\\pi,D,B$ data simultaneously at both RHIC and LHC. Robustness to uncertainties in modeling the suppression of cec degrees of freedom is tested by comparing results based on lattice data for Polyakov loop versus for quark susceptibility. The emergent cmm degrees of freedom are shown to solve robustly the long standing $R_{AA}$ vs $v_2$ puzzle by predicting a maximum of the jet quenching parameter field $\\hat{q}(E,T)/T^3$ near $T_c$. Robustness and consistency of jet quenching with observed bulk perfect fluidity is demonstrated by extrapolating the sQGMP $\\hat{q}$ down to thermal energy $E\\sim 3 T$ scales and showing that the $\\eta/s \\approx T^3/\\hat{q}$ falls close to the unitarity bound, $1/4\\pi$, in the range $(1-2)T_c$.
Jiri Stepan; Petr Heinzel; Sylvie Sahal-Brechot
2007-01-22T23:59:59.000Z
Context. We present a theoretical review of the effect of impact polarization of a hydrogen H$\\alpha$ line due to an expected proton beam bombardment in solar flares. Aims. Several observations indicate the presence of the linear polarization of the hydrogen H$\\alpha$ line observed near the solar limb above 5% and preferentially in the radial direction. We theoretically review the problem of deceleration of the beam originating in the coronal reconnection site due to its interaction with the chromospheric plasma, and describe the formalism of the density matrix used in our description of the atomic processes and the treatment of collisional rates. Methods. We solve the self-consistent NLTE radiation transfer problem for the particular semiempirical chromosphere models for both intensity and linear polarization components of the radiation field. Results. In contrast to recent calculations, our results show that the energy distribution of the proton beam at H$\\alpha$ formation levels and depolarizing collisions by background electrons and protons cause a significant reduction of the effect below 0.1%. The radiation transfer solution shows that tangential resonance-scattering polarization dominates over the impact polarization effect in all considered models. Conclusions. In the models studied, proton beams are unlikely to be a satisfying explanation for the observed linear polarization of the H$\\alpha$ line.
Firestone, Richard B; Revay, Zsolt
2009-12-01T23:59:59.000Z
Independent databases of nuclear constants for Neutron Activation Analysis (NAA) have been independently maintained by the physics and chemistry communities for many year. They contain thermal neturon cross sections s0, standardization values k0, and transition probabilities Pg. Chemistry databases tend to rely upon direct measurements of the nuclear constants k0 and Pg which are often published in chemistry journals while the physics databases typically include evaluated s0 and Pg data from a variety of experiments published mainly in physics journals. The IAEA/LBNL Evaluated Gamma-ray Activation File (EGAF) also contains prompt and delayed g-ray cross sections sg from Prompt Gamma-ray Activation Analysis (PGAA) measurements that can also be used to determine k0 and s0 values. As a result several independent databases of fundamental constants for NAA have evolved containing slightly different and sometimes discrepant results. An IAEA CRP for a Reference Database for Neutron Activation Analysis was established to compare these databases and investigate the possibilitiy of producing a self-consistent set of s0, k0, sg, and Pg values for NAA and other applications. Preliminary results of this IAEA CRP comparison are given in this paper.
Fradera, Jorge
2013-01-01T23:59:59.000Z
Helium (He) nucleation in liquid metal breeding blankets of a DT fusion reactor may have a significant impact regarding system design, safety and operation. Large He production rates are expected due to tritium (T) fuel self-sufficiency requirement, as both, He and T, are produced at the same rate. Low He solubility, local high concentrations, radiation damage and fluid discontinuities, among other phenomena, may yield the necessary conditions for He nucleation. Hence, He nucleation may have a significant impact on T inventory and may lower the T breeding ratio. A model based on the self-consistent nucleation theory (SCT) with a surface tension curvature correction model has been implemented in OpenFoam(r) CFD code. A modification through a single parameter of the necessary nucleation condition is proposed in order to take into account all the nucleation triggering phenomena, specially radiation induced nucleation. Moreover, the kinetic growth model has been adapted so as to allow for the transition from a cr...
Ouyang, Bing, E-mail: ouyangbing.zj@foxmail.com; Xue, Jia-Dan, E-mail: jenniexue@126.com; Zheng, Xuming, E-mail: zhengxuming126@126.com, E-mail: zxm@zstu.edu.cn, E-mail: fangwh@dnu.edu.cn [Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018 (China)] [Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018 (China); Fang, Wei-Hai, E-mail: zxm@zstu.edu.cn, E-mail: fangwh@dnu.edu.cn, E-mail: fangwh@dnu.edu.cn [Department of Chemistry, Beijing Normal University, Beijing 100875 (China)] [Department of Chemistry, Beijing Normal University, Beijing 100875 (China)
2014-05-21T23:59:59.000Z
The excited state structural dynamics of phenyl isothiocyanate (PITC) after excitation to the light absorbing S{sub 2}(A?), S{sub 6}(A?), and S{sub 7}(A?) excited states were studied by using the resonance Raman spectroscopy and complete active space self-consistent field method calculations. The UV absorption bands of PITC were assigned. The vibrational assignments were done on the basis of the Fourier transform (FT)-Raman and FT-infrared measurements, the density-functional theory computations, and the normal mode analysis. The A-, B-, and C-bands resonance Raman spectra in cyclohexane, acetonitrile, and methanol solvents were, respectively, obtained at 299.1, 282.4, 266.0, 252.7, 228.7, 217.8, and 208.8 nm excitation wavelengths to probe the corresponding structural dynamics of PITC. The results indicated that the structural dynamics in the S{sub 2}(A?), S{sub 6}(A?), and S{sub 7}(A?) excited states were very different. The conical intersection point CI(S{sub 2}/S{sub 1}) were predicted to play important role in the low-lying excited state decay dynamics. Two major decay channels were predicted for PITC upon excitation to the S{sub 2}(A?) state: the radiative S{sub 2,min} ? S{sub 0} transition and the nonradiative S{sub 2} ? S{sub 1} internal conversion via CI(S{sub 2}/S{sub 1}). The differences in the decay dynamics between methyl isothiocyanate and PITC in the first light absorbing excited state were discussed. The role of the intersystem crossing point ISC(S{sub 1}/T{sub 1}) in the excited state decay dynamics of PITC is evaluated.
Kajino, Mizuo; Easter, Richard C.; Ghan, Steven J.
2013-09-10T23:59:59.000Z
A triple moment sectional method, Modal Bin Hybrid Model (MBHM), has been developed. In addition to number and mass (volume), surface area is predicted (and preserved), which is important for gas-to-particle mass transfer and light extinction cross section. The performance of MBHM was evaluated against double moment sectional (DMS) methods with various size resolutions up to BIN256 (BINx: x is number of sections over three orders of magnitude in size, ?logD = 3/x) for simulating evolution of particles under simultaneously occurring nucleation, condensation and coagulation processes. Because MBHM gives a physically consistent form of the intra-sectional distributions, errors and biases of MBHM at BIN4-8 resolution were almost equivalent to those of DMS at BIN16-32 resolution for various important variables such as the moments Mk (k: 0, 2, 3), dMk/dt, and the number and volume of particles larger than a certain diameter. Another important feature of MBHM is that only a single bin is adequate to simulate full aerosol dynamics for particles whose size distribution can be approximated by a single lognormal mode. This flexibility is useful for process-oriented (multi category and/or mixing state) modeling: primary aerosols whose size parameters would not differ substantially in time and space can be expressed by a single or a small number of modes, whereas secondary aerosols whose size changes drastically from one to several hundred nanometers can be expressed by a number of modes. Added dimensions can be applied to MBHM to represent mixing state or photo-chemical age for aerosol mixing state studies.
Reynolds, T; Gerbi, B; Higgins, P [UniversityMinnesota, Minneapolis, MN (United States)
2014-06-01T23:59:59.000Z
Purpose: To compare the surface dose (SD) measured using a PTW 30-360 extrapolation chamber with different commonly used dosimeters (Ds): parallel plate ion chambers (ICs): RMI-449 (Attix), Capintec PS-033, PTW 30-329 (Markus) and Memorial; TLD chips (cTLD), TLD powder (pTLD), optically stimulated (OSLs), radiochromic (EXR2) and radiographic (EDR2) films, and to provide an intercomparison correction to Ds for each of them. Methods: Investigations were performed for a 6 MV x-ray beam (Varian Clinac 2300, 10x10 cm{sup 2} open field, SSD = 100 cm). The Ds were placed at the surface of the solid water phantom and at the reference depth dref=1.7cm. The measurements for cTLD, OSLs, EDR2 and EXR2 were corrected to SD using an extrapolation method (EM) indexed to the baseline PTW 30-360 measurements. A consistent use of the EM involved: 1) irradiation of three Ds stacked on top of each other on the surface of the phantom; 2) measurement of the relative dose value for each layer; and, 3) extrapolation of these values to zero thickness. An additional measurement was performed with externally exposed OSLs (eOSLs), that were rotated out of their protective housing. Results: All single Ds measurements overestimated the SD compared with the extrapolation chamber, except for Attix IC. The closest match to the true SD was measured with the Attix IC (? 0.1%), followed by pTLD (0.5%), Capintec (4.5%), Memorial (7.3%), Markus (10%), cTLD (11.8%), eOSL (12.8%), EXR2 (14%), EDR2 (14.8%) and OSL (26%). The EM method of correction for SD worked well for all Ds, except the unexposed OSLs. Conclusion: This EM cross calibration of solid state detectors with an extrapolation or Attix chamber can provide thickness corrections for cTLD, eOSLs, EXR2, and EDR2. Standard packaged OSLs were not found to be simply corrected.
Seldin, Jonathan P.
Career Management _______________ _______________ Management 3380 - Technological Change pursue the Bachelor of Management as a second degree. Second degree programs consist of the Arts and Science and 2000-level Management courses required for the chosen major, the Management core courses
Experience at Fermilab with high quantum efficiency photo-cathodes for rf electron guns
A. Fry, E. Hahn, W. Hartung, M. Kuchnir, P. Michelato and D. Sertore
1998-10-01T23:59:59.000Z
As part of the A0 Photo-injector collaboration at Fermi-lab [1, 2] and the TeSLA collaboration [3], a high bright-ness, low emittance electron source has been developed. In the process, a system was constructed for coating molybde-num cathodes with a layer of cæsium telluride (Cs2 Te), a photo-emissive material of high quantum efficiency (QE). The use of Cs2 Te was first investigated at CERN [4] and LANL [5]. The development of the systems for the TeSLA Test Facility Linac and the Fermilab Photo-injector was done in Milano [6]. The system at Fermilab incorporates manipulator arms to transfer a cathode from the preparation chamber into a 1.3 GHz photo-electron RF gun while it re-mains in an ultra-high vacuum (UHV) environment, in or-der to avoid the deleterious effects of residual gases on the QE. A first prototype electron gun has been operated with a photo-cathode for several months [1]. This paper describes preliminary results obtained with the first 2 photo-cathodes and the first gun. Some of the desired parameters for the TeSLA Test Fa-cility beam are given in Table 1. The desired characteristics for the photo-cathodes include (i) high QE, (ii) high current density (>500 A/cm{sup 2} ), (iii) long lifetime, and (iv) low field emission. The choice of Cs2 Te is a compromise between long lifetime, rugged metal cathodes with low QE (typi-cally between 10{sup -6} and 10{sup -4} and semiconductor cathodes with high QE (>10%), which generally have a short life-time because of their sensitivity to contamination.
-central Saskatchewan. The Winter Heavy Oil Pool (approximately 566 044 mmbl) consists of bitumen-rich sands fromABSTRACT Major heavy oil deposits are present in Lower Cretaceous strata of west-level rise (Cummings Member). Exploitable heavy oil reservoirs are contained within these incised valley
Maroncelli, Mark
IM Sports BOCCE Rules TEAM: A normal team consists of 4 players, but may play with 3, 2 or 1 as many of your teams Bocce closer to the Jack than your opponent's closest Bocce. A team is (Diagram shows 2 points for Team A) awarded 1-point per Bocce that is closer than opponents to the Jack
ABSTRACT Major heavy oil deposits are present in Lower Cretaceous strata of west-central Saskatchewan. The Winter Heavy Oil Pool (approximately 566 044 mmbl) consists of bitumen-rich sands from-level rise (Cummings Member). Exploitable heavy oil reservoirs are contained within these incised valley
Reed, Christopher A.
Minor The minor in Chemistry consists of 28 upper-division units in chemistry. 1-division courses in chemistry have a prerequisite of CHEM 001A, CHEM 001B, CHEM 001C, CHEM 01LA, CHEM 01LB, CHEM 01 005 as a prerequisite. Students with a minor in Chemistry should consult with their Chemistry advisor
Consistency-based System Security Techniques
Wei, Sheng
2013-01-01T23:59:59.000Z
level characterization using non-intrusive delay and powerthe study with a non-intrusive gate-level characterization
Training Reciprocity Achieves Greater Consistency, Saves Time...
Office of Environmental Management (EM)
the module includes training on the Idaho site commitment to safety and safety programs, quality assurance and environmental protection and the right to a safe and healthful...
Geometrical Interpretation of Consistent Tobias Werther
Eldar, Yonina
to be such that if f1, si = f2, si for all i, where f1, f2 W, then f1 = f2 or, equivalently, f1, f2 W, f1 - f2, si = 0 f1 = f2. (1) To satisfy (1), we must have that W S = {0} . (2) Dept. of Math., University of Vienna, Austria. Email: tobias.werther@univie.ac.at. Dept. of Electrical Engineering, Technion
Optimization Online - Time Consistent Risk Measure Under ...
Zhiping Chen
2015-05-12T23:59:59.000Z
May 12, 2015 ... ... we introduce a new risk measure which reflects the extra time cost between ... Xi'an Jiaotong University, 710049 Xi'an, Shaanxi, P. R. China.
Consistent massive graviton on arbitrary backgrounds
Laura Bernard; Cedric Deffayet; Mikael von Strauss
2015-05-15T23:59:59.000Z
We obtain the fully covariant linearized field equations for the metric perturbation in the de Rham-Gabadadze-Tolley (dRGT) ghost free massive gravities. For a subset of these theories, we show that the non dynamical metric that appears in the dRGT setup can be completely eliminated leading to the theory of a massive graviton moving in a single metric. This has a mass term which contains non trivial contributions of the space-time curvature. We show further how 5 covariant constraints can be obtained including one which leads to the tracelessness of the graviton on flat space-time and removes the Boulware-Deser ghost. The 5 constraints are obtained for a background metric which is arbitrary, i.e. which does not have to obey the background field equations.
Application-level caching with transactional consistency
Ports, Dan R. K. (Dan Robert Kenneth)
2012-01-01T23:59:59.000Z
Distributed in-memory application data caches like memcached are a popular solution for scaling database-driven web sites. These systems increase performance significantly by reducing load on both the database and application ...
Consistency-based System Security Techniques
Wei, Sheng
2013-01-01T23:59:59.000Z
119 Energy Hardware Trojans in Wirelessmeter for energy monitoring of wireless sensor networks attime detailed energy accounting for wireless sensor nodes.
Anxiety Within Families: Interrelations, Consistency, and Change
Champagne, Frances A.
AA, U.K. wUniversity of Cambridge, Cambridge, United Kingdom. #12;iety, has been found to predict ¼ 763), each with a focal child aged 4.5 years, anxiety levels were high. Only 54% of mothers had
Statistical Consistency With Dempster's Rule on
Valtorta, Marco
Parameters Stephen D. Durham Department of Statistics, University of South Carolina, Columbia, South Carolina Jeffery S. Smoika MEMC Electronic Materials, Inc., Spartanburg, South Carolina Marco Valtorta Department of Computer Science, University of South Carolina, Columbia, South Carolina ABSTRACT This paper defines
Consistency of Lambda-Lambda hypernuclear events
A. Gal; D. J. Millener
2011-12-21T23:59:59.000Z
Highlights of Lambda-Lambda emulsion events are briefly reviewed. Given three accepted events, shell-model predictions based on p-shell Lambda hypernuclear spectroscopic studies are shown to reproduce the Lambda-Lambda (LL) binding energies of LL10Be and LL13B in terms of the LL binding energy of LL6He. Predictions for other species offer judgement on several alternative assignments of the LL13B KEK-E176 event, and on the assignments LL11Be and LL12Be suggested recently for the KEK-E373 HIDA event. The predictions of the shell model, spanning a wide range of A values, are compared with those of cluster models, where the latter are available.
Consistency of the Nonsymmetric Gravitational Theory
J. W. Moffat
1994-12-22T23:59:59.000Z
A nonsymmetric gravitational theory (NGT) is presented which is free of ghost poles, tachyons and higher-order poles and there are no problems with asymptotic boundary conditions. An extended Birkhoff theorem is shown to hold for the spherically symmetric solution of the field equations. A static spherically symmetric solution in the short-range approximation, $\\mu^{-1} > 2m$, is everywhere regular and does not contain a black hole event horizon.
Consistency of the Nonsymmetric Gravitational Theory
J. W. Moffat
1994-03-07T23:59:59.000Z
The NGT field equations with sources are expanded first about a flat Minkowski background and then about a GR background to first-order in the antisymmetric part of the fundamental tensor, $g_{\\mu\
Consistent interacting multi-graviton theories
Idan Talshir
2014-12-29T23:59:59.000Z
We present a general model of interacting metric fields with the sum of Fierz-Pauli actions as its free limit.. These theories are energetically stable, i.e. their Hamiltonian is bounded from below and the multi-Minkowski metric configuration is the unique ground state. The model can be constructed even with the restriction of maximum two derivatives Lagrangian terms. The coupling can be made with an arbitrary number of metric fields on each vertex. The model is not based on some specific interaction structure that put extra constraints for the ghost degrees of freedom and thus avoids superluminal shock waves and causality problems subjected to these constraints. The dominant energy condition is maintained with respect to all metric fields for all field configurations.
Z. Steinczinger; L. Pusztai
2013-12-16T23:59:59.000Z
Following a fairly comprehensive study on popular interaction potentials of water (Pusztai et al., J. Chem. Phys., 2008, 129, 184103), here two more recent polarizable potential sets, SWM4-DP (Lamoureux et al., Chem. Phys. Lett., 2006, 418, 245) and BK3 (Kiss et al., J. Chem. Phys., 2013, 138, 204507) are compared to the TIP4P-2005 water potential (Abascal et al., J. Chem. Phys., 2005, 123, 234505) that had previously appeared to be most favoravble. The basis of comparison was the compatibility with the results of neutron and X-ray diffraction experiments on pure water, using the scheme applied by Pusztai et al. (2008). The scheme combines the experimental total scattering structure factors (TSSF) and partial radial distribution functions (PRDF) from molecular dynamics simulations in a single structural model. Goodness-of-fit values to the O-O, O-H and H-H simulated PRDF-s and to the experimental neutron and X-ray TSSF provided a measure that can characterize the level of consistency between interaction potentials and diffraction experiments. Among the sets of partial RDF-s investigated here, the ones corresponding to the SWM4-DP potential parameters have proven to be the most consistent with the particular diffraction results taken for the present study, by a hardly significant margin ahead of BK3. Perhaps more importantly, it is shown that the three sets of potential parameters produce nearly equivalent PRDF-s that may all be made consistent with diffraction data at a very high level. The largest differences can be detected in terms of the O-O partial radial distribution function.
Kim, Inkoo; Lee, Yoon Sup, E-mail: yslee@kaist.edu [Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Korea, Republic of)
2014-10-28T23:59:59.000Z
We report the formulation and implementation of KRCASPT2, a two-component multi-configurational second-order perturbation theory based on Kramers restricted complete active space self-consistent field (KRCASSCF) reference function, in the framework of the spin-orbit relativistic effective core potential. The zeroth-order Hamiltonian is defined as the sum of nondiagonal one-electron operators with generalized two-component Fock matrix elements as scalar factors. The Kramers symmetry within the zeroth-order Hamiltonian is maintained via the use of a state-averaged density, allowing a consistent treatment of degenerate states. The explicit expressions are derived for the matrix elements of the zeroth-order Hamiltonian as well as for the perturbation vector. The use of a fully variational reference function and nondiagonal operators in relativistic multi-configurational perturbation theory is reported for the first time. A series of initial calculations are performed on the ionization potential and excitation energies of the atoms of the 6p-block; the results display a significant improvement over those from KRCASSCF, showing a closer agreement with experimental results. Accurate atomic properties of the superheavy elements of the 7p-block are also presented, and the electronic structures of the low-lying excited states are compared with those of their lighter homologues.
Clabo, D.A. Jr.
1987-04-01T23:59:59.000Z
Inclusion of the anharmonicity normal mode vibrations (i.e., the third and fourth (and higher) derivatives of a molecular Born-Oppenheimer potential energy surface) is necessary in order to theoretically reproduce experimental fundamental vibrational frequencies of a molecule. Although ab initio determinations of harmonic vibrational frequencies may give errors of only a few percent by the inclusion of electron correlation within a large basis set for small molecules, in general, molecular fundamental vibrational frequencies are more often available from high resolution vibration-rotation spectra. Recently developed analytic third derivatives methods for self-consistent-field (SCF) wavefunctions have made it possible to examine with previously unavailable accuracy and computational efficiency the anharmonic force fields of small molecules.
Wegener, Dirk [GNS Gesellschaft fuer Nuklear-Service mbH, Essen (Germany); Kluth, Thomas [Siempelkamp Nukleartechnik GmbH, Krefeld (Germany)
2012-07-01T23:59:59.000Z
During maintenance of nuclear power plants, and during their decommissioning period, a large quantity of radioactive metallic waste will accrue. On the other hand the capacity for final disposal of radioactive waste in Germany is limited as well as that in the US. That is why all procedures related to this topic should be handled with a maximum of efficiency. The German model of consistent recycling of the radioactive metal scrap within the nuclear industry therefore also offers high capabilities for facilities in the US. The paper gives a compact overview of the impressive results of melting treatment, the current potential and further developments. Thousands of cubic metres of final disposal capacity have been saved. The highest level of efficiency and safety by combining general surface decontamination by blasting and nuclide specific decontamination by melting associated with the typical effects of homogenization. An established process - nationally and internationally recognized. Excellent connection between economy and ecology. (authors)
M. F. Nieva; N. Przybilla
2007-11-23T23:59:59.000Z
Precise determinations of the chemical composition in early B-type stars consitute fundamental observational constraints on stellar and galactochemical evolution. Carbon is one of the most abundant metals in the Universe but analyses in early-type stars show inconclusive results, like large discrepancies between analyses of different lines in C II, a failure to establish the C II/III ionization balance and the derivation of systematically lower abundances than from other objects. We present a comprehensive and robust C II/III/IV model for non-LTE line-formation calculations based on carefully selected atomic data. The model is calibrated with high-S/N spectra of six apparently slow-rotating early B-type dwarfs and giants, which cover a wide parameter range and are randomly distributed in the solar neighbourhood. A self-consistent quantitative spectrum analysis is performed using an extensive iteration scheme to determine stellar atmospheric parameters and to select the appropriate atomic data used for the derivation of chemical abundances. We establish the carbon ionization balance for all sample stars based on a unique set of input atomic data, achieving consistency for all modelled lines. Highly accurate atmospheric parameters and a homogeneous carbon abundance with reduced systematic errors are derived. This results in a present-day stellar carbon abundance in the solar neighbourhood, which is in good agreement with recent determinations of the solar value and with the gas-phase abundance of the Orion H II region. The homogeneous present-day carbon abundance also conforms with predictions of chemical-evolution models for the Galaxy. The present approach allows us to constrain the effects of systematic errors on fundamental parameters and abundances. (abridged)
New Chiral Phosphorus Ligands for Enantioselective Hydrogenation Wenjun Tang and Xumu Zhang*
Zhang, Xumu
- cally pure pharmaceuticals, agrochemicals, flavors, and other fine chemicals has advanced the field
Krykunov, Mykhaylo; Seth, Mike; Ziegler, Tom [Department of Chemistry, University of Calgary, University Drive 2500, Calgary, Alberta T2N 1N4 (Canada)] [Department of Chemistry, University of Calgary, University Drive 2500, Calgary, Alberta T2N 1N4 (Canada)
2014-05-14T23:59:59.000Z
We have applied the relaxed and self-consistent extension of constricted variational density functional theory (RSCF-CV-DFT) for the calculation of the lowest charge transfer transitions in the molecular complex X-TCNE between X = benzene and TCNE = tetracyanoethylene. Use was made of functionals with a fixed fraction (?) of Hartree-Fock exchange ranging from ? = 0 to ? = 0.5 as well as functionals with a long range correction (LC) that introduces Hartree-Fock exchange for longer inter-electronic distances. A detailed comparison and analysis is given for each functional between the performance of RSCF-CV-DFT and adiabatic time-dependent density functional theory (TDDFT) within the Tamm-Dancoff approximation. It is shown that in this particular case, all functionals afford the same reasonable agreement with experiment for RSCF-CV-DFT whereas only the LC-functionals afford a fair agreement with experiment using TDDFT. We have in addition calculated the CT transition energy for X-TCNE with X = toluene, o-xylene, and naphthalene employing the same functionals as for X = benzene. It is shown that the calculated charge transfer excitation energies are in as good agreement with experiment as those obtained from highly optimized LC-functionals using adiabatic TDDFT. We finally discuss the relation between the optimization of length separation parameters and orbital relaxation in the RSCF-CV-DFT scheme.
Haynes, Gregory M
1996-01-01T23:59:59.000Z
Tradition Site Near Yucca Mountain, Nevada G R E G O R Y M .Institute near Yucca Mountain, Nevada, have revealed anlevel at the top of Yucca Mountain. Vegetation is typi- cal
A Probabilistic Approach to Site-Specific, Hazard-Consistent
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankShale_Gas.pdfService on the TargetFY12 DOE -NAT IONA L S T R AT E GIC PL A N F OR A DVAAA Path to2011
On Consistent Mapping in Distributed Environments using Mobile Sensors
Saha, Roshmik
2011-10-21T23:59:59.000Z
The problem of robotic mapping, also known as simultaneous localization and mapping (SLAM), by a mobile agent for large distributed environments is addressed in this dissertation. This has sometimes been referred to as the holy grail in the robotics...
Summary of commercial conservation programs environmental issues and program consistency
Beachler, M.C.
1989-06-01T23:59:59.000Z
Pacific Northwest Laboratory (PNL) conducted this study for the Office of Energy Resources of the Bonneville Power Administration. The purpose of the report is to compare and contrast the environmental requirements and issues involving Bonneville's residential conservation programs. In addition to environmental issues that Bonneville has addressed in environmental documents, this report also briefly examines new issues that may affect residential conservation programs. The key environmental concern confronting each of the programs with measures aimed at reducing air leakage in houses (both new and existing) is indoor air quality. There are inconsistencies in how the Weatherization Program and the New Homes programs approach indoor air quality. However, these differences make sense, given the character and constraints affecting how each program operates. Newer issues that have arisen include global warming, potential health effects of mineral and glass fibers, and possible fire hazards associated with plastic foam and cellulose insulation. Bonneville staff are aware of these issues as they relate to conservation programs. No action appears necessary at this time.
Data Quality Mining: Employing Classifiers for Assuring consistent Datasets
Appelrath, Hans-Jürgen
.g. wind power and biogas plants, and combined heat and power generation together with the conventional
On the consistency of tachyon warm inflation with viscous pressure
Cid, Antonella
2015-01-01T23:59:59.000Z
We obtain conditions for the existence of an attractor in the system of equations describing a tachyon warm inflationary model with bulk viscosity taken into account. When these conditions are met the evolution approaches slow-roll regime. We present the primordial power spectrum for the tachyon field by considering a dissipation coefficient depending on the scalar field and temperature.
Consistent cloud computing storage as the basis for distributed applications
Anderson, James William
2011-01-01T23:59:59.000Z
availability and lower critical—path latency. Sinfonia [21]adds latency to the critical path of RS1\\/I oper- ations,additional latency for the critical path of operations and
Update procedures and the 1-consistency of arithmetic
Avigad, Jeremy
, to the assertion that one can always solve certain systems of equations involving finite partial functions, 48(1):313, 2002. Work partially sup- ported by NSF Grant DMS 0070600. 1 #12;arithmetic. In Section 4, implicit in Ackermann's proof of termination for the epsilon-substitution method [1]. It is also implicit
Surface tension of electrolyte solutions: A self-consistent theory
Podgornik, Rudolf
Compilation Index Visit the EPL website to read the latest articles published in cutting-edge fields-review process, from selection of the referees to making all final acceptance decisions Impact Factor Â The 2010 Impact Factor is 2.753; your work will be in the right place to be cited by your peers Speed
Blood Circulatory System The circulatory system consists of
Cochran-Stafira, D. Liane
oxygen from the lungs and deliver it to tissues of the body. To pick up carbon dioxide from the tissues and unload it in the lungs. Red blood cells They contain many molecules of hemoglobin. Hemoglobin. When blood containing bicarbonate ions reaches the lungs, carbon dioxide diffuses out of the blood
Impact of Load Sharing on Provisioning Services with Consistency Requirements
of ser- vices must provision their servers so that response times remain low even wheen demand is high. The total demand at a serving system is comprised of an aggregate of demands from multiple servicing algorithms provides upper bounds of the response times, and shows that greedy algorithms can reduce
A Framework for Computer Aided Consistency Verification of UML Models
Comini, Marco
-UML formalisms. Indeed it does not require developers further (heavy) cognitive load and, moreover, does of practical importance, a fact that nowadays the software engineering commu- nity has accepted. Indeed in suitable test code that is in- serted within the application code. Then, at run-time, the test code
Multi-writer consistency conditions for shared memory objects
Shao, Cheng
2009-05-15T23:59:59.000Z
(A) = (0;0) ts := 1 query(C) = (0;0) update(C;(1;1)) ts := 1 update(A;(1;1)) update(B;(2;1)) ack update(C;(2;1)) ack start R1(x) query(A) = (1;1) start R2(x) query(B) = (2;1) query(B) = (2;1) return 1 query(C) = (2;1) return 2 start R3(x) query(A) = (1.... Formally: Deflnition 4 Given a schedule , consider a function ? from the set of read oper- ations in to the set of write operations in . ? is called a reads-from function if for every read operation r, r and ?(r) operate on the same shared variable...
The design of Bayes consistent loss functions for classification
Masnadi-Shirazi, Hamed
2011-01-01T23:59:59.000Z
and R. C. Weng, “A note on platt’s probabilistic outputs forVision, 1997. [75] J. Platt, “Probabilistic outputs forp. 734. [104] P. Viola, J. C. Platt, and C. Zhang, “Multiple
Mixtures that are consistently long-lasting, constructible,
measure in a concrete mixture? · Properties to predict durability (5) · Water content and w/cm (3) · Unapproved materials · High cement contents · Poor construction practices · Aggregate and concrete handling upon construction data (3) · Tests for acceptance and uniformity (3) · Permeability (2) · Minimum
Mixtures that are consistently long-lasting, constructible,
Temperature Monitoring · Foam Index ·Permeability ·Torrent · Boiled water test · Micro-Deval abrasion test that includes slag or Class F fly ash Will change many concrete mixture properties Reduce Class C fly ash dosage Will change many concrete mixture properties Use a water reducer or retarder Will change setting time Change
Consistent Query Answering Of Conjunctive Queries Under Primary Key Constraints
Pema, Enela
2014-01-01T23:59:59.000Z
Queries and Primary Key Constraints . . . . . . . . . .of Employee w.r.t. the primary key SSN ? {name, salary} . .query answering under primary keys: a characterization of
Highly Accurate Inverse Consistent Registration: A Robust Approach
Reuter, Martin
, Cambridge, MA, USA Abstract The registration of images is a task that is at the core of many applications to register images in the presence of differences, such as jaw movement, differential MR distortions and true image, accurate geometric transformations are necessary to register the input images into a common space
Consistency Error Modeling-based Localization in Sensor Networks
Feng, Jessica; Potkonjak, Miodrag
2006-01-01T23:59:59.000Z
distributed, embedded, wireless systems. IEEE CAS WorkshopConference on Embedded Networked Sensor Systems. (Nov.
The Problem Conventional office lighting typically consists of bright fluo-
by delamping--result in lower power consump- tion. The PLS, which features light-emitting diode (LED lighting is reduced and three light-emitting diode (LED) task lights (two desk lamps and one undercabinet
Crystallographically consistent percolation theory for grain boundary networks
Frary, Megan
2005-01-01T23:59:59.000Z
Grain boundaries are known to play a role in many important material properties including creep resistance, ductility and cracking resistance. Although the structure and properties of individual boundaries are important, ...
Mills, Kevin
themselves into larger collections that cooperate to meet an application need, and (4) to detect and adapt to failures. 3-Party Design 2-Party Design Adaptive 2/3-Party Design Vertically Integrated 3-Party Design>> Announce Service Processing() > start Renewal Task() ServiceManager() > start Service
Evolutionary self-consistent models of HII galaxies
M. Martín Manjón; M. Mollá; A. I. Díaz
2007-01-26T23:59:59.000Z
We have studied the viability of new theoretical models which combine a chemical evolution code, an evolutionary synthesis code and a photoionization code, to understand the star formation and evolution of H{\\sc ii} galaxies. The emission lines observed in H{\\sc ii} galaxies are reproduced by meas of the photoionization code CLOUDY, using as ionizing spectrum the spectral energy distribution of the modeled H{\\sc ii} galaxy, which, in turn, is calculated according to a Star Formation History (SFH) and a metallicity evolution given by a chemical evolution model. Our technique reproduces the observed diagnostic diagrams and equivalent width-color correlations for local H{\\sc ii} galaxies.
Discrete Fourier Transform Homework consists of the problems not ...
2011-02-18T23:59:59.000Z
its digits in decimal system. Same modulo 9. .... engineering and communication). One of the ... Many achievements of the modern “computer revolution” would be impossi- ... 4An analog computer specially designed to evaluate Fourier Transform. ... published at exactly the right time, when fast digital computers just became.
A new class of truly consistent splitting schemes for incompressible ...
2003-10-23T23:59:59.000Z
b Department of Mathematics, Purdue University, West Lafayette 47907, USA ... 1 The work of this author is supported by CNRS and Texas Institute for ... and is corrected in the second sub-step by projecting the intermediate velocity onto the.
Certification of Consistency with Washington's Coastal Zone Management
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasmaP aCentrotherm Photovoltaics AG Jump to: navigation, search Name: CentrothermCerion EnergyProgram for
Certification of Consistency with Washington's Coastal Zone Management
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasmaP aCentrotherm Photovoltaics AG Jump to: navigation, search Name: CentrothermCerion EnergyProgram
A consistent second order projection scheme for simulating transient
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23TribalInformation Access toTen ProblemsU.S. Department ofStrategiesAsustained byNationalofviscous
An event consists of a set of charge, tim
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:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article)41cloth Documentation DataDepartment of EnergyOn-Farm Biofuelin HawaiiNaturalAdvanced Battery(Technical Report)event
Nanohybrid Solar Cells Consisting of Self-Assembled Semiconducting
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:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journalhttp://www.fnal.gov/directorate/nalcal/nalcal02_07_05_files/nalcal.gifSolarApril 2013 Also inNanoDays NanoDaysAdvanced
Implicit attitude measures: Consistency, stability, and convergent validity
Cunningham, W. A.; Preacher, Kristopher J.; Banaji, M. R.
2001-01-01T23:59:59.000Z
, it is unclear whether different implicit Table 1. Means, standard deviations, reliabilities, and correlation matrix of measured variables MRS1 MRS2 MRS3 MRS4 IAT1 IAT2 IAT3 IAT4 RW-IAT1 RW-IAT2 RW-IAT3 RW-IAT4 RW-P1 RW-P2 RW-P3 RW-P4 MRS1 (.74) MRS2 .80 (.75...) MRS3 .78 .82 (.82) MRS4 .76 .77 .86 (.79) IAT1 .21 .15 .15 .14 (.88) IAT2 .13 .14 .10 .08 .31 (.78) IAT3 .16 .26 .23 .20 .42 .50 (.75) IAT4 .14 .17 .16 .13 .16 .33 .17 (.68) RW-IAT1 .20 .16 .19 .26 .33 .11 .23 .07 (.68) RW-IAT2 .26 .29 .18 .19 .20 .27...
California Department of Fish and Wildlife Consistency Determination
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasmaP a gHigh4-FD-aBeijing SinohytecBrownville,Calendar HomeCalendar HomeInformationCaliforniaWebpage |
Training Reciprocity Achieves Greater Consistency, Saves Time and Money for
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23Tribal Energy Program GrantState Energy LoanFor the Topic A input requirements ofTRACTIONTheDOEIdaho,
Non-trivial checks of novel consistency relations (Journal Article) |
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect Journal Article:UsingMeson tomaterials :Newton's Methodquantum
GWI plan ensures focused, consistent approach to improvements | Y-12
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:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirt DocumentationSitesWeather6Environmental1 |MAgnEtProjects FundingGE GlobalGNU Â» GNUNationalNational
Nonlinearly consistent schemes for coupled problems in reactor analysis
Mahadevan, Vijay Subramaniam
2007-04-25T23:59:59.000Z
the coupling strategies currently in use and put forth their deficiencies. 4 head2right Explain the basic theory for our new coupling strategy and how the deficiencies in current schemes can be overcome head2right Discuss some stable numerical... problems arising in coupled physics. Based on the consolidated work concerning the theory of nonlinear properties of numerical methods by several researchers like Hairer E, Wanner G on solving non-stiff and stiff ODEs[7,8], Dekker K, Verver J...
Consistent cloud computing storage as the basis for distributed applications
Anderson, James William
2011-01-01T23:59:59.000Z
Messaging in Cloud Computing . . . . . . . . . .7 1.4Eucalyptus Open—Source Cloud—Computing System. In C'C&#http://www.eweek.com/c/a/Cloud-Computing/Amazons—Head—Start—
Consistent Graph Layout for Weighted Graphs Dana Vrajitoru
Vrajitoru, Dana
of years from now aliens discover traces of human civilization on Earth and they at- tempt to recover our, and that all that the aliens can find is a sched- ule of an airline company featuring the duration of various flights from a location to another. The question is, can the aliens reconstruct the current map
Self-consistent Gaussian model of nonperturbative QCD vacuum
A. P. Bakulev; A. V. Pimikov
2006-10-05T23:59:59.000Z
We show that the minimal Gaussian model of nonlocal vacuum quark and quark-gluon condensates in QCD generates the non-transversity of vector current correlators. We suggest the improved Gaussian model of the nonperturbative QCD vacuum, which respects QCD equations of motion and minimizes the revealed gauge-invariance breakdown. We obtain the refined values of pion distribution amplitude (DA) conformal moments using the improved QCD vacuum model and construct the allowed region for Gegenbauer coefficients a_2 and a_4 of the pion DA.
Time Consistent Recursive Risk Measures Under Regime Switching ...
2015-02-04T23:59:59.000Z
The proper description of dynamic information correlation among individual ... tic security market and investment risk in multi-stage portfolio selection models ...
From the equivalence principle to market consistent valuation Thomas Knispela
Grübel, Rudolf
of banks and insurance companies. A thorough quantitative analysis is a necessary prerequisite Hannover, Germany, email: knispel@stochastik.uni-hannover.de bTalanx AG, Quantitative Risk Management Weberc April 19, 2011 Abstract Insurance companies are exposed to many different types of risk
Time Consistent Risk Measure Under Stopping Time Framework ...
2015-02-13T23:59:59.000Z
or down-side risk measures have been proposed, from the Roy's safety-first criterion .... the probability P(xt ? Ct) to be no less than ? at time t, i.e.,. P(xt ? Ct) ...... 1, into the objective function E[xt], we have. E[xt] = t?1. ? k=0 ekx0 + t?1. ? s
Towards a consistent model for Neutron-Star Sources
W. Kundt
2002-08-30T23:59:59.000Z
We are still far from understanding how pulsars pulse, how neutron stars are born, what neutron stars can emit, and in which way they do this. In this short communication, I list 18 alternatives -- several of them old, a few of them new -- which are handled differently by different authors but all of which are crucial for a model of neutron stars to be viable.
Consistency of Taxonomic Treatments: A Response to Remsen (2005)
Peterson, A. Townsend; Navarro-Sigü enza, Adolfo G.
2006-07-01T23:59:59.000Z
recent treatment of Mexican bird taxonomy (Navarro- Sigüenza and Peterson 2004) as relying on a “trust us, we’ve looked at the specimens” approach. He claims that our approach lacks rigor and recalls the heyday of the antiquated “Peters Checklist... from our research group Commentary The Auk 123(3):885–887, 2006 © The American Ornithologists’ Union, 2006. Printed in USA. Commentary886 [Auk, Vol. 123 (Peterson and Navarro-Sigüenza 2000, García- Moreno et al. 2004) and from others (Johnson 2004...
Consistent scenario for B{yields}PS decays
Delepine, D.; Lucio M, J. L.; Mendoza S, J. A.; Ramirez, Carlos A. [Instituto de Fisica, Universidad de Guanajuato Loma del Bosque 103, Lomas del Campestre, 37150 Leon, Guanajuato (Mexico); Depto. de Fisica-Matematicas, Universidad de Pamplona Pamplona, Norte de Santander (Colombia); Escuela de Fisica, Universidad Industrial de Santander, A.A. 678, Bucaramanga (Colombia)
2008-12-01T23:59:59.000Z
We consider B{yields}PS decays where P stands for pseudoscalar and S for a heavy (1500 MeV) scalar meson. We achieve agreement with available experimental data, which includes two orders of magnitude hierarchy, assuming the scalars mesons are two quark states. The contribution of the dipolar penguin operator O{sub 11} is quantified.
Mission Statement Financial Affairs consists of diversified departments whose primary
Fernandez, Eduardo
of the latest information and management technologies and their application within the human, fiscal and staff by providing a complement of administrative, fiscal support services. The areas within Financial, Ph.D., is the Vice President for Financial Affairs at Florida Atlantic University. As Chief Fiscal
Temple, Darcy Merideth Goode
1977-01-01T23:59:59.000Z
- cally as a part of' the TAG project. The rift valley is continuous and is right-laterally offset up to 10 km by small (less than 10 km) transform faults and minor fracture zones (Fig. 1). The east wall of the rift consists of fracture zone valleys... approximately N7'E, or 19' west of the N25'E rift valley trend. It is apparent from Table 2 (p. 42) that traverse 2 blocks have greater vertical displacement and width, and steeper fault zone slopes than traverse 1 blocks. There is also a predominance...
Welch, Billy Jack
1959-01-01T23:59:59.000Z
PROBLEIIIIS. CONCLUSION. REFERENCES LIST OF FIGURES F I gure 1. Plastic Bending 2. Typical Connection- Tee t Equi pment, Test. Equi pment I natal led in Loading Machine. Typi cal Specimen. 6. Typi cal Jii g Load-def'lect i on Diagram AD-If R i vet..., . 032 Inch Sheet Load ? deflection Diagram AD-f Rivet, . 040 Inch Sheet Load-dsf'lection Diagram AD-4 Rivet, . 051 Inch Sheet Load-def'lection Diagram AD-5 Rivet, . GIfG Inch Sheet Load-def'lection Diagram AD-5 Rivet, . 0/1 Inch Sheet Load...
Finding patterns in blog shapes and blog evolution Mary McGlohon Jure Leskovec Christos Faloutsos
Faloutsos, Christos
Finding patterns in blog shapes and blog evolution Mary McGlohon Jure Leskovec Christos Faloutsos Can we cluster blogs into types by considering their typi- cal posting and linking behavior? How do blogs evolve over time? In this work we answer these questions, by providing several sets of blog
CAREER VIEW CAREER DEVELOPMENT AND EMPLOYMENT INFORMATION SERIES
Frean, Marcus
of consumers, households and companies, which comes down to such factors as individual prices, wage rates and international viewpoint. Top- ics of analysis include the study of employment, inflation, industrial production events such as changes in oil prices, world sharemarkets, wars, business confidence, etc. This is typi
Sandhu, Ravi
of commercial cnvironwrnt\\ and, for that matter, to those ofa typi- rat goucmmen~ or "tcss top secret" mit,",,- icatty, many current top-secret installations treat security as a pew ptc problem hy running a system of the box has little or no sccu- rity. Untikc a rap-secret defense environment that can presen, a business
; POSS copolymer; polyolefin nanocomposites; organicinorganic hybrid materials INTRODUCTION Recently- hybrid counterparts. Among the many synthetic approaches to obtaining nanocomposites, the use to be an efficient method for de- signing hybrid nanocomposite materials.3 A typi- cal POSS nanoparticle contains
Chesnut, John Kent
1989-01-01T23:59:59.000Z
*, or sha!e prese&it. A typi('al gem(i&a rav curve is s?&0\\vii in figure 10. Thi ]og shin de!&nestes (!ean silrld or limestone zones, ivhic)! ]&ave li! t)e pistassium "Ii and ]ov. rsdi&&activitv. (&n ihe log, cieau sands are de!]ected t&& tli&' left...
PREPARED FORTHE U.S. DEPARTMENT OF ENERGY, UNDER CONTRACT DEAC0276CH03073
to illustrate technique. Small variations in undary are reduce reverse phase of major island chain. I that magnetohydrodynamic (MHD) equilibrium solutions typi have magnetic islands chaotic lines; however small variations boundary. Computation equilibrium provided Princeton Iterative Equi librium Solver, [5
GRANULAR MICROHYDRODYNAMICS : EMERGENCE OF f 04=3 LAW Hisao Hayakawa
Hayakawa, Hisao
be regarded as a one dimen sional realization of a fluidized bed is also a typi cal example of unusual cal behaviors [1], such as convection [2], size segrega tion [3], bubbling [4], standing waves and localized excitations [5,6] under vertical vibration and a flu idized bed due to air injected inside a box
SYNERGY JOURNAL OF UBC SCIENCE ISSUE 2|2004
Karczmarek, Joanna
on gas phase ions and developing new techniques in mass spectrometry for ap- plications in biotechnology amounts of peptides. "The interest of biotechnology and phar- maceutical industries has generated become a critical tool in medicine, drug testing and environmental applications. Typi- cal questions
JOURNAL DE PHYSIQUE Colloque Cl, supplment au n8, Tome 44, fvrier 1983 page Cl-333
Paris-Sud XI, Université de
and Skrinsky / 2_/ and has been theoreti- cally studied by E. Coisson / 3_/, C. Shih and A. Yariv / 4_/ and P
Factors Affecting the Longevity and Strength in an In Vitro Model of the Bone–Ligament Interface
Paxton, Jennifer Z.; Donnelly, Kenneth; Keatch, Robert P.; Baar, Keith; Grover, Liam M.
2010-01-01T23:59:59.000Z
laser sintering 35 or 3D powdered printing. 14 Speci?cally,et al. 14 showed that 3D powder printing could be used to
An empirical analysis on the adoption of alternative fuel vehicles:The case of natural gas vehicles
Yeh, Sonia
2007-01-01T23:59:59.000Z
The role of Natural Gas in the Transportation Sector. Theto promote natural gas fuel for transportation use. Theprices of natural gas speci?cally for transportation (price–
Pricing Conspicuous Consumption Products in Recession Periods ...
2012-09-26T23:59:59.000Z
cally used in chemical engineering, e.g., to avoid irreversible reactions in ... Our basic problem is based on an economic setting with a recession period followed.
Giant Enhancement in UV Response of ZnO Nanobelts by Polymer Surface-Functionalization
Wang, Zhong L.
to remove surface chemical residuals and other contaminants before testing or polymer functionalization-co-MAc), anioni- cally charged poly(N-isopropylacrylamide) (PNIPAM), and car- boxymethylcellulose (CMC
Sustainable use of California biomass resources can help meet state and national bioenergy targets
Jenkins, Bryan M; Williams, Robert B; Gildart, Martha C; Kaffka, Stephen R.; Hartsough, Bruce; Dempster, Peter G
2009-01-01T23:59:59.000Z
electricity from biomass and other renewable sources wereMethanol Biomass-to-liquids (BTL) Renewable diesels,products, biomass refers to biologi- cally derived renewable
Arc Consistency and Quasigroup Completion Paul Shaw Kostas Stergiou Toby Walsh
Walsh, Toby
to any order n, f1g f1,. . . ng . . . f1,. . . ng f1,. . . ng f1,. . . ng f1g . . . f1,. . . ng f1,. . . ng . . . . . . . . . . . . . . . f1,. . . ng f1,. . . ng . . . f1g f1,. . . ng f1,. . . ng f1,. . . ng . . .
Arc Consistency and Quasigroup Completion Paul Shaw Kostas Stergiou Toby Walsh
Walsh, Toby
,bg frg fg,bg fg,bg fg,bg frg 2 #12;This example can be generalized to any order n, f1g f1,...ng ... f1,...ng f1,...ng f1,...ng f1g ... f1,...ng f1,...ng ... ... ... ... ... f1,...ng f1,...ng ... f1g f1,...ng f1,...ng f1,...ng ... f1,...ng f1,...ng 3 Random Preassignment The random preassignment of some
Ricci, Laura
, a stable super-peer infrastructure, and is well adapted to ad hoc P2P net- work with high peer churn rate and go at any time (high churn rate). Message routing is nondeterministic. Routes may be unidirec- tional
The solar tachocline: a self-consistent model of magnetic confinement
Wood, Toby
2011-01-11T23:59:59.000Z
spectrum (e.g. Christensen-Dalsgaard & Thompson, 2007, & refs).1 The sound speed is particularly well constrained (to within a few parts in 104) since it is the principal factor determining the acoustic oscillation frequencies. However, the vertical... model, and so the results may depend, to some extent, on the reference model chosen. See Christensen-Dalsgaard & Thompson (2007) for further details. 18 2. The Sun’s Differential Rotation in opacity, the simplest resolution is simply to artificially...
Sun, Dengfeng
, field maintenance, certification, systems acquisi- tions, and a variety of other services are air carrier, 27 percent air taxi, 33 percent general aviation, and 4 percent military. · Approximately 49,409,000 instrument operations logged by FAA towers annually. America's aviation industry
July 4, 2012: Discovery of a particle "consistent" with Higgs Boson |
Office of Environmental Management (EM)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362 334Department ofEnergy FYIntegrated SecurityWorld DesignEnergy July 12, 2011Department of
Patnaude, Daniel J; Slane, Patrick O; Badenes, Carles; Heger, Alexander; Ellison, Donald C; Nagataki, Shigehiro
2015-01-01T23:59:59.000Z
The recent discovery that the Fe-K line luminosities and energy centroids observed in nearby SNRs are a strong discriminant of both progenitor type and circumstellar environment has implications for our understanding of supernova progenitor evolution. Using models for the chemical composition of core-collapse supernova ejecta, we model the dynamics and thermal X-ray emission from shocked ejecta and circumstellar material, modeled as an $r^{-2}$ wind, to ages of 3000 years. We compare the X-ray spectra expected from these models to observations made with the Suzaku satellite. We also model the dynamics and X-ray emission from Type Ia progenitor models. We find a clear distinction in Fe-K line energy centroid between core-collapse and Type Ia models. The core-collapse supernova models predict higher Fe-K line centroid energies than the Type Ia models, in agreement with observations. We argue that the higher line centroids are a consequence of the increased densities found in the circumstellar environment create...
Toward a consistent use of overshooting parametrizations in 1D stellar evolution codes
Viallet, Maxime; Prat, Vincent; Arnett, David
2015-01-01T23:59:59.000Z
Several parametrizations for overshooting in 1D stellar evolution calculations coexist in the literature. These parametrizations are used somewhat arbitrarily in stellar evolution codes, based on what works best for a given problem, or even for historical reasons related to the development of each code. We bring attention to the fact that these different parametrizations correspond to different physical regimes of overshooting, depending whether the effects of radiation are dominant, marginal, or negligible. Our analysis is based on previously published theoretical results, as well as multidimensional hydrodynamical simulations of stellar convection where the interaction between the convective region and a stably-stratified region is observed. Although the underlying hydrodynamical processes are the same, the outcome of the overshooting process is profoundly affected by radiative effects. Using a simple picture of the scales involved in the overshooting process, we show how three regimes are obtained, dependi...
Munday, David Alexander
2013-01-01T23:59:59.000Z
resources are on the critical path for load operations. Slowoperations is not in the critical path. Instruc- tionsstructures from the critical path, providing an opportunity
A Scalable Cloud-based Queueing Service with Improved Consistency Levels
Kim, Minkyong
to access the service, an HTTP REST component provides a RESTful interface of the native queue API via HTTP available and partition tolerant persis- tence. The queue operations component implements a queue API using Cassan- dra API. The queue operations component stores all states in Cassandra; there- fore, multiple
A self-consistent stellar and 3D nebular model for Planetary Nebula IC418
Morisset, C
2009-01-01T23:59:59.000Z
We present a coherent stellar and nebular model reproducing the observations of the Planetary Nebula IC418. We want to test whether a stellar model obtained by fitting the stellar observations is able to satisfactory ionize the nebula and reproduce the nebular observations, which is by no mean evident. This allows us to determine all the physical parameters of both the star and the nebula, including the abundances and the distance. We used all the observational material available (FUSE, IUE, STIS and optical spectra) to constrain the stellar atmosphere model performed using the CMFGEN code. The photoionization model is done with Cloudy_3D, and is based on CTIO, Lick, SPM, IUE and ISO spectra as well as HST images. More than 140 nebular emission lines are compared to the observed intensities. We reproduce all the observations for the star and the nebula. The 3D morphology of the gas distribution is determined. The effective temperature of the star is 36.7kK. Its luminosity is 7700 solar luminosity. We describe...
Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine
Kroeger, Timothy H
2013-09-19T23:59:59.000Z
The brake torque of a direct-injection diesel engine is known to plateau over a range of injection timings. Injection timing affects the engine’s ignition delay and the fractions of fuel which burn in premixed and diffusion modes. Therefore...
Remarks on hedging and numeraire consistency in an incomplete binomial model
Zariphopoulou, Thaleia
that the hedgeable and unhedgeable components of risk are priced by ...nancial markets and insurance valuation methods, respectively. Namely, the total risk at the end of a time period is conditioned on the hedgeable
On the consistency of a repulsive gravity phase in the early Universe
A. B. Batista; J. C. Fabris; S. V. B. Goncalves
2001-02-07T23:59:59.000Z
We exploit the possibility of existence of a repulsive gravity phase in the evolution of the Universe. A toy model with a free scalar field minimally coupled to gravity, but with the "wrong sign" for the energy and negative curvature for the spatial section, is studied in detail. The background solutions display a bouncing, non-singular Universe. The model is well-behaved with respect to tensor perturbations. But, it exhibits growing models with respect to scalar perturbations whose maximum occurs in the bouncing. Hence, large inhomogeneties are produced. At least for this case, a repulsive phase may destroy homogeneity, and in this sense it may be unstable. A newtonian analogous model is worked out; it displays qualitatively the same behaviour. The generality of this result is discussed. In particular, it is shown that the addition of an attractive radiative fluid does not change essentially the results. We discuss also a quantum version of the classical repulsive phase, through the Wheeler-de Witt equation in mini-superspace, and we show that it displays essentially the same scenario as the corresponding attractive phase.
Rocha, Adrian V.; Goulden, Michael L.
2008-01-01T23:59:59.000Z
Net Ecosystem Production (NEP) variability was the largestthe annual sums of GEE, TER and NEP were large (Figure 5).NEP ranged from – 251 gC m À2 a À1 in 2000 to 515 gC m À2 a
Testing the consistency of the $??$ transition form factor with unitarity and analyticity
I. Caprini
2015-05-20T23:59:59.000Z
We perform a dispersive analysis of the $\\omega\\pi$ electromagnetic transition form factor, using as input the discontinuity provided by unitarity below the $\\omega\\pi$ threshold and including for the first time experimental data on the modulus measured from $e^+e^-\\to\\omega\\pi^0$ at higher energies. The input leads to stringent parameterization-free constraints on the modulus of the form factor below the $\\omega\\pi$ threshold, which are in disagreement with some experimental values measured from $\\omega\\to \\pi^0\\gamma^*$ decay. We discuss the dependence on the input parameters in the unitarity relation, using for illustration an $N/D$ formalism for the P partial wave of the scattering process $\\omega\\pi \\to \\pi\\pi$, improved by a simple prescription which simulates the rescattering in the crossed channels. Our results confirm the existence of a conflict between experimental data and theoretical calculations of the $\\omega\\pi$ form factor in the region around 0.6 GeV and bring further arguments in support of renewed experimental efforts to measure more precisely the $\\omega\\to\\pi^0\\gamma^*$ decay.
Technical Program Maintaining Consistent Conditions over a Wide Range of Material
Zabaras, Nicholas J.
of Material Deposition Rates in Beam-Based Additive Manufacturing: Jack Beuth1; Shane Esola1; Raymond Walker2 consideration for additive manufacturing and repair applications in the aerospace industry. To be successful Effect of Process Parameters on Electron Beam Melted (EBM) Additively Manufactured Components in Ti-6Al-4
Collective excitations of transactinide nuclei in a self-consistent mean field theory
L. Prochniak
2007-12-03T23:59:59.000Z
The ATDHFB approach has been applied for a study of properties of collective quadrupole states in several transactinide nuclei: 238U, 240Pu, 242Pu, 246Cm, 248Cm, 250Cf and 252Cf. Calculated energies and B(E2) transition probabilities are in a reasonable agreement with experimental data. Results concerning superdeformed collective states in the 240Pu nucleus are also presented.
Samanta, Kousik
2010-07-14T23:59:59.000Z
framework for the com- plex scaling method (CSM) and show how it can be used with bound state methods. In the next section we give a brief outline on the origin of the divergent resonance wavefunction in the Siegert?s treatment.38 Next, we introduce... of the CSM, especially how the di erent parts of the complex scaled Hamiltonian may be constructed. At the end we conclude and summarize our discussion. 5 B. Scattering Resonances and Divergent Siegert Function According to Dirac39,40 and Gamow,41 the time...
Andrei P. Kirilyuk
2014-05-14T23:59:59.000Z
The universal symmetry, or conservation, of complexity underlies any law or principle of system dynamics and describes the unceasing transformation of dynamic information into dynamic entropy as the unique way to conserve their sum, the total dynamic complexity. Here we describe the real world structure emergence and dynamics as manifestation of the universal symmetry of complexity of initially homogeneous interaction between two protofields. It provides the unified complex-dynamic, causally complete origin of physically real, 3D space, time, elementary particles, their properties (mass, charge, spin, etc.), quantum, relativistic, and classical behaviour, as well as fundamental interaction forces, including naturally quantized gravitation. The old and new cosmological problems (including "dark" mass and energy) are basically solved for this explicitly emerging, self-tuning world structure characterised by strictly positive (and large) energy-complexity. A general relation is obtained between the numbers of world dimensions and fundamental forces, excluding plausible existence of hidden dimensions. The unified, causally explained quantum, classical, and relativistic properties (and types of behaviour) are generalised to all higher levels of complex world dynamics. The real world structure, dynamics, and evolution are exactly reproduced by the probabilistic dynamical fractal, which is obtained as the truly complete general solution of a problem and the unique structure of the new mathematics of complexity. We outline particular, problem-solving applications of always exact, but irregularly structured symmetry of unreduced dynamic complexity to microworld dynamics, including particle physics, genuine quantum chaos, real nanobiotechnology, and reliable genomics.
Rocha, Adrian V.; Goulden, Michael L.
2008-01-01T23:59:59.000Z
on the annual carbon sequestration by a boreal aspen forest,tions into wetland carbon sequestration as remediation forin order to assess its carbon sequestration potential. 5.2.
A Performance Analysis of K-Bound, a Consistency Protocol Supporting Multiple Isolation Levels
Muñoz, Francesc
´ul Salinas, Francesc D. Mu~noz-Esco´i Instituto Tecnol´ogico de Inform´atica Universidad Polit´ecnica de Levels Ra´ul Salinas, Francesc D. Mu~noz-Esco´i Instituto Tecnol´ogico de Inform´atica Universidad Polit
A Consistency-based Specification for the One-Copy Serializability Variants
Muñoz, Francesc
. D. Mu~noz-Esco´i Instituto Tecnol´ogico de Inform´atica Universitat Polit`ecnica de Val`encia 46022-Fuertes, F. D. Mu~noz-Esco´i Instituto Tecnol´ogico de Inform´atica Universitat Polit`ecnica de Val
Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine
Kroeger, Timothy H
2013-09-19T23:59:59.000Z
The brake torque of a direct-injection diesel engine is known to plateau over a range of injection timings. Injection timing affects the engine’s ignition delay and the fractions of fuel which burn in premixed and diffusion modes. Therefore...
School of Architecture The Syracuse University School of Architecture consistently ranks
Mather, Patrick T.
, and 3D printing your designs in computing and fabrication labs; and collaborate with students from other
GENERIC-based thermodynamically consistent time integration methods for coupled dissipative problems
Segatti, Antonio
to best fit in the GENERIC formalism. However, this choice obliged to assume important restrictions problems that preserve symmetries and the laws of thermodynamics Part I: Monolithic integrators
Plotkin, Joshua B.
Winding Numbers Kenshi Takayama ETH Zurich Alec Jacobson ETH Zurich Ladislav Kavan University coherency of the generalized winding number function proposed in that work could be used to correctly orienting facets in polygon meshes by minimizing the Dirichlet energy of generalized winding numbers. While
Torrellas, Josep
Support W. Ahn, S. Qi, M. Nicolaides, J. Torrellas University of Illinois at Urbana-Champaign dahn2,sqi2
9 Esta licenciatura ofrece un diploma tcnico intermedio, en qu consiste?
Islas, León
instituciones pú- blicas de enseñanza de nivel superior, una licenciatura dedicada ente- ramente a la Historia museos. · Escribir notas periodísticas de difusión cultural en los medios de comunicación. 10 El egresado educación media y media superior. · Asistente de curaduría, investigación o museografía. · Colaborador en la
Parikh, Priti P; Zheng, Jie; Logan-Klumpler, Flora; Stoeckert, Christian J Jr; Louis, Christos; Topalis, Pantelis; Protasio, Anna V; Sheth, Amit P; Carrington, Mark; Berriman, Matthew; Sahoo, Satya S
2012-05-23T23:59:59.000Z
the ability to search the database according to GO annotations. Since not every phenotype can be described using GO terms alone, GeneDB is building a controlled phenotype curation system that will utilize GO in combination with other relevant ontologies... languages, and also facilitate automated discovery of implicit knowledge in large datasets. For example, The Gene Ontology (GO) [19] has enabled a standardized, cross-database, description of gene products. However, until recently, there has not been a...
Chet Nieter
2010-12-01T23:59:59.000Z
Superconducting radio frequency (SRF) cavities are a popular choice among researchers designing new accelerators because of the reduced power losses due to surface resistance. However, SRF cavities still have unresolved problems, including the loss of power to stray electrons. Sources of these electrons are field emission from the walls and ionization of background gas, but the predominant source is secondary emission yield (SEY) from electron impact. When the electron motion is in resonance with the cavity fields the electrons strike the cavity surface repeatedly creating a resonant build up of electrons referred to as multipacting. Cavity shaping has successfully reduced multipacting for cavities used in very high energy accelerators. However, multipacting is still a concern for the cavity power couplers, where shaping is not possible, and for cavities used to accelerate particles at moderate velocities. This Phase II project built upon existing models in the VORPAL simulation framework to allow for simulations of multipacting behavior in SRF cavities and their associated structures. The technical work involved allowed existing models of secondary electron generation to work with the complex boundary conditions needed to model the cavity structures. The types of data produced by VORPAL were also expanded to include data common used by cavity designers to evaluate cavity performance. Post-processing tools were also modified to provide information directly related to the conditions that produce multipacting. These new methods were demonstrated by running simulations of a cavity design being developed by researchers at Jefferson National Laboratory to attempt to identify the multipacting that would be an issue for the cavity design being considered. These simulations demonstrate that VORPAL now has the capabilities to assist researchers working with SRF cavities to understand and identify possible multipacting issues with their cavity designs.
A cognitive-consistency based model of population wide attitude change.
Lakkaraju, Kiran; Speed, Ann Elizabeth
2010-06-01T23:59:59.000Z
Attitudes play a significant role in determining how individuals process information and behave. In this paper we have developed a new computational model of population wide attitude change that captures the social level: how individuals interact and communicate information, and the cognitive level: how attitudes and concept interact with each other. The model captures the cognitive aspect by representing each individuals as a parallel constraint satisfaction network. The dynamics of this model are explored through a simple attitude change experiment where we vary the social network and distribution of attitudes in a population.
A COMPLETE APPLICATION consists of: Instructor Application Two Letters of Reference
Huang, Haiying
school subjects qualified to instruct ( Number top 4 subjects and check all that apply): English Literature Pre-Algebra Biology French American Literature Algebra I Anatomy/ Physiology Spanish Composition Geometry Physics Latin Grammar Algebra II Chemistry Chinese / Japanese Creative Writing
Transactors: A Programming Model for Maintaining Globally Consistent Distributed State in Unreliable
Bystroff, Chris
.3.3 [Programming Languages]: Language Constructs and Features--concurrent programming structures; F.3.2 [Logics and Meanings of Programs]: Semantics of Programming Languages--operational semantics.3 [Programming Techniques]: Concurrent Programming--distributed programming General Terms Languages, Reliability
Gonzalez Abad, Karin G
2013-07-23T23:59:59.000Z
FIGURE Page 5.1 Permeability reduction as a function of solid saturation for values of 0.4, 0.5, 0.6, and 0.8. : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 67 6.1 2D reservoir simulation grid with 625 cells (nx=25, ny=25, and nz=1... superscript D v; l; s) fi Fugacity of pure component (with subscripts i , j ) bfi Fugacity of component in a mixture Gt Total Gibbs energy h Depth k Permeability K Vapor/liquid equilibrium ratio of component kr Relative permeability l Liquid L Block...
Consistent methodology for technology and policy impact assessment. [Reference energy system
Beller, M
1980-10-01T23:59:59.000Z
A Reference Energy System is a useful tool for providing a baseline for energy technology and policy analysis. The technique of developing a Reference Energy System is described, and its use in various analyses is outlined.
Consistency testing of models used to infer rainfall from TRMM passive microwave observations
Bellows, Christopher Timothy
1999-01-01T23:59:59.000Z
The algorithms used for the retrieval of rainfall are based on physical modeling. One of the by-products of the algorithm is an estimate of the freezing level. Using observations from the TRMM precipitation radar, we can infer the freezing level...
Gabriel S. Denicol; Xu-Guang Huang; Tomoi Koide; Dirk H. Rischke
2010-03-03T23:59:59.000Z
The transport coefficients of causal relativistic dissipative fluid dynamics are calculated both in a field-theoretical and a kinetic approach. We find that the results from the traditional kinetic calculation by Israel and Stewart are modified. The new expressions for the viscous transport coefficients agree with the results obtained in the field-theoretical approach when the contributions from pair creation and annihilation are neglected.
LARGE MULTICONFIGURATION SELF-CONSISTENT-FIELD WAVEFUNCTIONS FOR THE OZONE MOLECULE
Schaefer III., Henry F.
2013-01-01T23:59:59.000Z
theory comparable to that employed here for ozone. HoweverB (cyclopentadiyl) > B (ozone) > B (methylene), based onfor the its state of ozone near geometry. Coefficients of
Full paper / Mmoire Self-assembly of hybrid solids consisting of 2D supramolecular
Paik Suh, Myunghyun
.P. Suh et al., C. R. Chimie 8 (2005). © 2005 Académie des sciences. Published by Elsevier SAS. All rights-0748/$ - see front matter © 2005 Académie des sciences. Published by Elsevier SAS. All rights reserved. doi:10; accepted 11 October 2004 Available online 22 April 2005 Abstract Hybrid compounds [NaCr(ox)3]2[Ni
Self consistent bathymetric mapping from robotic vehicles in the deep ocean
Roman, Christopher N
2005-01-01T23:59:59.000Z
Obtaining accurate and repeatable navigation for robotic vehicles in the deep ocean is difficult and consequently a limiting factor when constructing vehicle-based bathymetric maps. This thesis presents a methodology to ...
consistent with the climate history from oxygen isotopes and the general notion that
Hedges, Blair
- matches: the glaciation of the Late Ordovi- cian period (440 million years ago) and the cool climate, as wellastheintensityofthehydrologicalcycle, which ultimately dictates the cloudiness of the planet and its ice-cap coverage. These changes
Nikulov, A V
2015-01-01T23:59:59.000Z
Canonical description of quantization effects observed at measurements on superconducting structures seems one of the most triumphant achievements of quantum mechanics. But impartial consideration uncovers incompleteness and inconsistency of this description. Contradictions in the description of other quantum phenomena are revealed also.
Device Overview The Smart Mirror system consists of a depth camera, a
Wang, Deli
applications that require a rapid, non-intrusive method to scan 3D models. Business Opportunities Clothing technology lie in rapid, non-intrusive data capture, which allow the Smart Mirror to be easily applied
Winstanley, A. V.; Sperotto, R. G.; Putnick, D. L.; Cherian, S.; Bornstein, M. H.; Gattis, M.
2014-10-30T23:59:59.000Z
). This gap in the literature is significant ants born prematurely may be at risk due to early non-optimal caregiving environments (e.g., Clark, Woodward, ding author at: Merideth Gattis, School of Psychology, Cardiff University, Park Place, Cardiff, CF10 3AT... & Development 37 (2014) 760–771 and higher categorical thinking. That is, mothers of preterm infants have been described as more intrusive and con- trolling and less sensitive and responsive (Feldman & Eidelman, 2006; Feldman & Eidelman, 2007; Forcada-Guex et al...
A Self-Consistent Method to Assess Air Quality Co-Benefits from US Climate Policies
Saari, R.
Air quality co-benefits can potentially reduce the costs of greenhouse gas mitigation. However, while many studies of the cost of greenhouse gas mitigation model the full macroeconomic welfare impacts, most studies of air ...
Are Latin American and Caribbean Biofuel Policies Consistent with their Comparative Advantages?
, bioethanol, biodiesel and biogas constitute these types of alternative energies. Furthermore, they can
Ohmacht, Martin
2014-09-09T23:59:59.000Z
In a multiprocessor system, a central memory synchronization module coordinates memory synchronization requests responsive to memory access requests in flight, a generation counter, and a reclaim pointer. The central module communicates via point-to-point communication. The module includes a global OR reduce tree for each memory access requesting device, for detecting memory access requests in flight. An interface unit is implemented associated with each processor requesting synchronization. The interface unit includes multiple generation completion detectors. The generation count and reclaim pointer do not pass one another.
High-Performance Distributed ML at Scale through Parameter Server Consistency Models
Xing, Eric P.
, connected via 1Gbps ethernet. We use = 0.05, and the step-sizes are calibrated for both systems to be equal in expectation) Given convex function f(x) = T t=1 ft(x) such that components ft are also convex. We search convex function f(x) = T t=1 ft(x) such that components ft are also convex. We search for minimizer x via
Enhancing the Availability of Networked Database Services by Replication and Consistency Maintenance
Muñoz, Francesc
channels, bandwidth, powerful harware etc may be a scarce resource. Particu- larly for web services in wide
Fully self-consistent solution of the Dyson equation using a...
Office of Scientific and Technical Information (OSTI)
1180212 GrantContract Number: AC02-05CH11231 Type: Publisher's Accepted Manuscript Journal Name: Physical Review B Additional Journal Information: Journal Volume: 91; Journal...
Behavioral-attitudinal consistency as it relates to Kohlbergs stages of moral development
Bailey, Sara Dolores
1981-01-01T23:59:59.000Z
luck. b. People's misfortunes result from the m1stakes they make. 3. a. One of the major reasons why we have wars 1s because people don 't take enough i nterest 1n politics . b. There w111 always be wars, no matter how hard people try to prevent.... Most students don't realize the extent to which the1r grades are influenced by accidental happenings. 6. a. Without the r1ght breaks one cannot be an effective leader. b. Capable people who fail to become leaders have not taken advantage of the1r...
Device Overview The Smart Mirror system consists of a depth camera, a
California at San Diego, University of
to other fields that require building 3D models, such as animation and 3D printing. Nikhil Das, Behnam
5.11 Subproject Brokate The group consists of Prof. Martin Brokate
Turova, Varvara
a model of so-called play-type with a convenient regu- larization. PPi PPq S imbibition f2(S) drainage f1 , pc(S) = f1(S), f1(S), , [f1(S), f2(S)], f2(S), > f2(S). Oleg Pykhteev (in cooperation, and moreover they concern rather basic sit- uations (e.g. [2]). From the engineering point of view, the recent
Huang, Jianwei
.122612.120770 Fig. 1. Illustrative topology for the failure of network coding. node for flow 1 (f1) and flow 2 (f2), and node 4 is the decoding node for f1 and encoding node for another flow pair, f1 and flow 3 (f3). In this example, a packet, P1, from f1 is encoded at node 3 with another packet, P2, from f2 to form packet, P1 P
A simplified model for thermal-wave cavity self-consistent measurement of thermal diffusivity
Shen, Jun, E-mail: jun.shen@nrc-cnrc.gc.ca; Zhou, Jianqin; Gu, Caikang [Energy, Mining and Environment Portfolio, National Research Council Canada, 4250 East Mall, Vancouver, British Columbia V6T 1W5 (Canada)] [Energy, Mining and Environment Portfolio, National Research Council Canada, 4250 East Mall, Vancouver, British Columbia V6T 1W5 (Canada); Neill, Stuart [Energy, Mining and Environment Portfolio, National Research Council Canada, 1200 Montreal Road, Building M-9, Ottawa, Ontario K1A 0R6 (Canada)] [Energy, Mining and Environment Portfolio, National Research Council Canada, 1200 Montreal Road, Building M-9, Ottawa, Ontario K1A 0R6 (Canada); Michaelian, Kirk H.; Fairbridge, Craig [CanmetENERGY, Natural Resources Canada, One Oil Drive Patch, Devon, Alberta T9G 1A8 (Canada)] [CanmetENERGY, Natural Resources Canada, One Oil Drive Patch, Devon, Alberta T9G 1A8 (Canada); Astrath, Nelson G. C.; Baesso, Mauro L. [Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá, Paraná 87020-900 (Brazil)] [Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá, Paraná 87020-900 (Brazil)
2013-12-15T23:59:59.000Z
A simplified theoretical model was developed for the thermal-wave cavity (TWC) technique in this study. This model takes thermal radiation into account and can be employed for absolute measurements of the thermal diffusivity of gas and liquid samples without any knowledge of geometrical and thermal parameters of the components of the TWC. Using this model and cavity-length scans, thermal diffusivities of air and distilled water were accurately and precisely measured as (2.191 ± 0.004) × 10{sup ?5} and (1.427 ± 0.009) × 10{sup ?7} m{sup 2}?s{sup ?1}, respectively, in very good agreement with accepted literature values.
Consistency of Principal Ratings by Central Office Administration Across Various Job Related Factors
Bennett-O'Brien, Kristin
2012-08-31T23:59:59.000Z
, and the federal government. However, many forms of appraisal have failed to assess the daily work of principals. The conventional form of evaluation in the field of educational leadership has focused on a process whereby a central office administrator...
Hierarchical Cache Consistency in a WAN \\Lambda Jian Yin, Lorenzo Alvisi, Mike Dahlin, Calvin Lin
Dahlin, Michael D.
. Specif ically, by adapting to clients' access patterns, twolevel hierarchies reduce the read latency for enforcing strong con sistency semantics that is separate from the policy ques tion of when to renew volume leases. We focus on a policy where clients fetch volume lease renewals on de mand when they access
Hierarchical Cache Consistency in a WAN Jian Yin, Lorenzo Alvisi, Mike Dahlin, Calvin Lin
Dahlin, Michael D.
. Specif- ically, by adapting to clients' access patterns, two-level hierarchies reduce the read latency strong con- sistency semantics that is separate from the policy ques- tion of when to renew volume leases. We focus on a policy where clients fetch volume lease renewals on de- mand when they access a volume
Understanding Consistency Maintenance in Service Discovery Architectures in Response to Message Loss
Mills, Kevin
themselves into larger collections that cooperate to meet an application need, and (4) to detect and adapt to failures. 3-Party Design 2-Party Design Adaptive 2/3-Party Design Vertically Integrated 3-Party DesignContext() > Cache Manager Discover y() > Announce Ser vice Processing() > start Renewal
Experimental The selected catanionic reverse micelle system consists of water, decane, and
Liu, Jie
. [11] a) J. Y. Lao, J. G. Wen, Z. F. Ren, Nano Lett. 2002, 2, 1287. b) J. Y. Lao, J. Y. Huang, D. Z. Wang, Z. F. Ren, Nano Lett. 2003, 3, 235. c) H. Q. Yan, R. R. He, J. Johnson, M. Law, R. J. Saykally, P. D. Yang, J. Am. Chem. Soc. 2003, 125, 4728. [12] H. Shi, L. Qi, J. Ma, H. Cheng, J. Am. Chem. Soc
Towards a consistent estimate of the chiral low-energy constants
V. Cirigliano; G. Ecker; M. Eidemuller; R. Kaiser; A. Pich; J. Portoles
2006-07-17T23:59:59.000Z
Guided by the large-Nc limit of QCD, we construct the most general chiral resonance Lagrangian that can generate chiral low-energy constants up to O(p^6). By integrating out the resonance fields, the low-energy constants are parametrized in terms of resonance masses and couplings. Information on those couplings and on the low-energy constants can be extracted by analysing QCD Green functions of currents both for large and small momenta. The chiral resonance theory generates Green functions that interpolate between QCD and chiral perturbation theory. As specific examples we consider the VAP and SPP Green functions.
Consistent Comparison of Macroscopic and State-to-State Kinetics in Hypersonic Flows
D'Ambrosio, Domenic
is conducted in a N2-N system using the test conditions of the EAST facility nozzle experiment, for which relative energy of the v-th vibrational state [eV] E total energy per unit volume Evib absolute energy constant p pressure Qvib vibrational partition function Rd average vibrational energy lost in a dissocia
Time-dependent self-consistent-field dynamics based on a reaction path Hamiltonian. I. Theory
Hammes-Schiffer, Sharon
the coupling between the normal modes and the curvature are zero, the dynamics of an F-dimensional system is zero and the coupling between the normal modes is non-zero, the dynamics is shown to still reduce as a dynamical process of nu- clei moving on a multidimensional adiabatic potential energy surface. Modern ab
SELF-CONSISTENT 3D MODELING OF ELECTRON CLOUD DYNAMICS AND BEAM RESPONSE
Furman, Miguel
.S. DOE under Contracts DE-AC02- 05CH11231 and W-7405-Eng-48, by the US-LHC Accelerator Research Project
Bailey-Kellogg, Chris
SCATTERING DATA Paritosh A. Kavathekar Department of Computer Science, Dartmouth College, Hanover, NH 03755 of Computer Science, Dartmouth College, Hanover, NH 0375 Email: devin@cs.dartmouth.edu Abstract: Scattering of neutrons and x-rays from molecules in solution offers alternative approaches to the studying of a wide
Defining a consistent strategy to model ground-motion parameters for the GEM-PEER Global
Paris-Sud XI, Université de
: The project entitled Global Ground Motion Prediction Equations is funded by the Global Earthquake Model (GEM Project S. Akkar Earthquake Engineering Research Center, Middle East Technical University, 06800 Ankara, Turkey J. Douglas BRGM, Orleans, France C. Di Alessandro Pacific Earthquake Engineering Research Center
Berger, Joseph; Fisek, M. Hamit
2015-08-06T23:59:59.000Z
on the Relational Insight Ability test. These scores were interpreted for the subjects in terms of a chart of national standards. A facsimile of this chart is reproduced in Figure 1 below. Thus the scores of the HH-LL subject were defined as superior scores... seem equally relevant, the tests themselves, in terms of their intrinsic properties, were constructed so as to be quite dissimilar from the Contrast Sensitivity task. At this point the subjects' scores on the two tests were reported to them...
Status and Opportunities for Improving the Consistency of Technical Reference Manuals
Jayaweera, Tina
2013-01-01T23:59:59.000Z
roof insulation. Most TRMs have adapted building prototypes from the California’s Database for Energy Efficient
On the Consistency of QCBED Structure Factor Measurements for TiO2 (Rutile)
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect Journal Article:UsingMesonSpeedingSpeeding accessArticle) |(Conference) |Boundary(Journal
On the Consistency of QCBED Structure Factor Measurements for TiO2 (Rutile)
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect Journal Article:UsingMesonSpeedingSpeeding accessArticle) |(Conference)
On the initial state and consistency relations (Journal Article) | SciTech
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect Journal Article:UsingMesonSpeedingSpeeding accessArticle)(Journal Article)effects
Rocha, Adrian V.; Goulden, Michael L.
2008-01-01T23:59:59.000Z
Environmental Conditions at the SJFM From 1999 to 2003 Year Air Temperature Average (Minimum, Maximum) (°C) Solar
Annual Logging Symposium, June 16-20, 2012 SATURATION-HEIGHT AND INVASION CONSISTENT HYDRAULIC
Torres-Verdín, Carlos
HYDRAULIC ROCK TYPING USING MULTI-WELL CONVENTIONAL LOGS Chicheng Xu and Carlos Torres-Verdín The University logging Symposium held in Cartagena, Colombia, June 16-20, 2012. ABSTRACT Hydraulic rock typing is based. Reliable hydraulic rock typing should simultaneously honor saturation behavior in the vertical direction
Microstructural Contol of the Porous Si3N4 Ceramics Consisted...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
CX-011282: Categorical Exclusion Determination ORNL: Low-Cost Direct Bonded Aluminum (DBA) Substrates (Agreement ID:23278) Mechanical Characterization of Fuel Injector...
TYPES OF PAINT DIY CHECKLIST Consists of pigments, additives and binders in an oil or
Peters, Richard
of coats and magnets will stick to your walls. `Waterborne enamels' or `waterborne alkyds' are becoming-BASED DISADVANTAGES · Dries slowly, longer wait between coats. · Very strong smell while drying. · Potentially harmful METHODS · Brush. · Roller. · Spray. WEAR AND TEAR · General traffic volume. · High wear and tear, eg
Significantly Shorter Fe-S Bond in Cytochrome P450-I is Consistent with
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:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) | SciTech Connect Journal Article: X-rayContractforCenters TechnologyresearchSealingChannelsSignal Speed inGreater
Title 43 CFR 1610.3-2 Consistency Requirements | Open Energy Information
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 onsource History View New PagessourceRavenandEconomiesEnergyTitle 29 Chapter 11 Management ofTitleTitleOpenTitleTitle 43
Microstructural Contol of the Porous Si3N4 Ceramics Consisted of
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasma | Department ofEnergy 9 Lehman final 1003 SC PMMemorandumUSzbDE-FOA-0000091.rtf Microsoft Word
Jing-Fei Zhang; Jia-Jia Geng; Xin Zhang
2014-10-17T23:59:59.000Z
The detection of the B-mode polarization of the cosmic microwave background (CMB) by the BICEP2 experiment implies that the tensor-to-scalar ratio $r$ should be involved in the base standard cosmology. In this paper, we extend the $\\Lambda$CDM+$r$+neutrino/dark radiation models by replacing the cosmological constant with the dynamical dark energy with constant $w$. Four neutrino plus dark energy models are considered, i.e., the $w$CDM+$r+\\sum m_\
8. MATERIAL MODELLING Abstract --The aim of this study consists in modelling the
Paris-Sud XI, Université de
to more severe operating conditions. Because of self-heating due to losses or the proximity of heat electrical application where skin effect in the material is insignificant, a macroscopic dynamical model (1
Self-consistent electrothermal analysis of nanotube network transistors S. Kumar,1,a
Alam, Muhammad A.
devices due to self-heating. The temperature rise in such devices can be as high as 500 K in extreme cases of Technology, Atlanta, Georgia 30332, USA 2 School of Electrical and Computer Engineering, Purdue University
Fully self-consistent solution of the Dyson equation using a plane-wave
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect Journal Article: DiscreteFELIX: Thenerve agenteffects9'S-0041 Publication Date:Article)
Minnesota, University of
the Agulhas Current, which flows along the southeastern coast of Africa and around the tip of South Africa dynamics. In addition to dominating the ocean's kinetic energy, eddies play a significant role. The ocean's kinetic energy is dominated by mesoscale variability: scales of tens to hundreds of kilometers
Method for computing self-consistent solution in a gun code
Nelson, Eric M
2014-09-23T23:59:59.000Z
Complex gun code computations can be made to converge more quickly based on a selection of one or more relaxation parameters. An eigenvalue analysis is applied to error residuals to identify two error eigenvalues that are associated with respective error residuals. Relaxation values can be selected based on these eigenvalues so that error residuals associated with each can be alternately reduced in successive iterations. In some examples, relaxation values that would be unstable if used alone can be used.
Final Scientific/Technical Report "Arc Tube Coating System for Color Consistency"
Buelow, Roger; Jenson, Chris; Kazenski, Keith
2013-03-21T23:59:59.000Z
DOE has enabled the use of coating materials using low cost application methods on light sources to positively affect the output of those sources. The coatings and light source combinations have shown increased lumen output of LED fixtures (1.5%-2.0%), LED arrays (1.4%) and LED powered remote phosphor systems â?? Philips L-Prize lamp (0.9%). We have also demonstrated lifetime enhancements (3000 hrs vs 8000 hrs) and shifting to higher CRI (51 to 65) in metal halide high intensity discharge lamps with metal oxide coatings. The coatings on LEDs and LED products are significant as the market is moving increasingly more towards LED technology. Enhancements in LED performance are demonstrated in this work through the use of available materials and low cost application processes. EFOI used low refractive index fluoropolymers and low cost dipping processes for application of the material to surfaces related to light transmission of LEDs and LED products. Materials included Teflon AF, an amorphous fluorinated polymer and fluorinated acrylic monomers. The DOE SSL Roadmap sets goals for LED performance moving into the future. EFOIâ??s coating technology is a means to shift the performance curve for LEDs. This is not limited to one type of LED, but is relevant across LED technologies. The metal halide work included the use of sol-gel solutions resulting in silicon dioxide and titanium dioxide coatings on the quartz substrates of the metal halide arc tubes. The coatings were applied using low cost dipping processes.
The family Gempylidae consists of 16 genera and 23 species. Only
on the sex ratio, repro- duction, and age and growth of roudi escolar off the Canary Islands (central (Gempylidae), off the Canary Islands José M. Lorenzo José G. Pajuelo Departamento de Biología (Universidad de the slope off the Canary Islands. In this area, this species is captured year round without signifi- cant
Lubricating-oil basestock data and analysis: based on the ASTM-NBS basestock consistency study
Becker, D.A.; Hsu, S.M.; Weeks, S.
1983-10-01T23:59:59.000Z
In this 13-month study, four virgin oil and six re-refined oil companies submitted monthly production samples to National Bureau of Standards (NBS). There, the samples were subdivided, coded, and sent to 14 participating laboratories for analysis of the physical and chemical properties as well as for evaluation in various bench tests. An eleventh control sample was sent monthly for reference. Various re-refining processes included in the study are: acid/clay; clay treatment; short path distillation; pretreat/vacuum distillation/clay finish; pretreat/hydrogenation. The processes for the virgin base oils are mainly solvent extraction/distillation with and without the hydro-finishing step. In this report the data are grouped into six main categories: (1) theology; (2) physical properties; (3) chemical properties; (4) hydrocarbon type analysis; (5) general performance tests; and (6) oxidation and wear bench tests. Within each category, test results are arranged according to the similarity of the tests or test properties.
Luding, Stefan
as the micro-scale. The interaction of multiple stones of various sizes and the mortar is defined as the meso-scale
Retrofit Audits and Cost Estimates: A Look at Quality and Consistency
L. Eisenberg, C. Shapiro, and W. Fleischer
2012-10-01T23:59:59.000Z
Retrofit NYC Block by Block is an outreach program targeting owners of one- to four-family homes, the most common building type in New York City, with more than 600,000 structures citywide. Administered by the Pratt Center for Community Development and implemented by four nonprofit, community-based organizations, Block by Block connects residents, businesses, and religious and civic organizations in predominantly low-and moderate-income neighborhoods with one or more of a half-dozen public and private financial incentive programs that facilitate energy-efficiency retrofits. This research project sought to evaluate the approach, effectiveness, and the energy use reductions accomplished by the Retrofit NYC: Block by Block program.
New analysis of O-14 beta decay: Branching ratios and conserved vector current consistency
Towner, IS; Hardy, John C.
2005-01-01T23:59:59.000Z
elements.1 We write 2pi3(h?c)6h? ln 2 G2 F V 2ud (mec2)5 = K = 6146 s, (2) 1Further, these nuclear matrix elements include the coupling constants in their definition. For example, the Gamow-Teller matrix element MGT includes the axial... whose momentum is between p and p + dp, we can write dN dp = Ap3(E0 ? E)2F (Z,E)S(Z,E)Q(p)R(p), (3) whereA = ? ln 2/K(mec)5 and is a constant of unknownmag- nitude. To calibrate the spectrometer and determine A, Sidhu made measurements...
An orbital-free self-consistent field approach for molecular clusters and liquids
Sean W. Derrickson; Eric R. Bittner
2005-10-31T23:59:59.000Z
We present an ``orbital'' free density functional theory for computing the quantum ground state of atomic clusters and liquids. Our approach combines the Bohm hydrodynamical description of quantum mechanics with an information theoretical approach to determine an optimal quantum density function in terms of density approximates to a statistical sample. The ideas of Bayesian statistical analysis and an expectation-maximization procedure are combined to develop approximations to the quantum density and thus find the approximate quantum force. The quantum force is then combined with a Lennard-Jones force to simulate clusters of Argon atoms and to obtain the ground state configurations and energies. As demonstration of the utility and flexibility of the approach, we compute the lowest energy structures for small rare-glass clusters. Extensions to many atom systems is straightforward.
Consistent Weighted Graph Layouts Dana Vrajitoru and Jason DeBoni
Vrajitoru, Dana
of years from now some aliens discover traces of human civilization on Earth and they try to recover our, and that all that the aliens find is a schedule of an airline company containing the amount of time that each flight would require to connect a given city to another. The problem is, can the aliens reconstruct