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
Signal processing underlying extrinsic control of stem cell fate
Zandstra, Peter W.
orchestrate the generation, maintenance, and re- generation of tissue while suppressing aberrant growth flexible to address these multifaceted and typi- cally exogenously elicited responses. Although numer- ous
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.
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
DISTRIBUTED REAL-TIME TASK MONITORING IN THE SAFETY-CRITICAL SYSTEM MELODY
Wedde, Horst F.
-critical systems (such as nuclear power plants, distributed cooperation of autonomous robots in Outer Space that are typi- cally unpredictable, a very high amount of adaptability of sys- tem functions is demanded. SafetyDISTRIBUTED REAL-TIME TASK MONITORING IN THE SAFETY-CRITICAL SYSTEM MELODY Horst F. Wedde, Jon A
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
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
under short-time analysis typi- cally used for speech enhancement. In order to achieve this we have performed speech enhancement experiments, where speech corrupted by additive white Gaussian noise degradation of enhanced speech quality. Informal listening tests show that the background noise resulting from
SSL/TLS Session-Aware User Authentication Using a GAA Bootstrapped Key
Sheldon, Nathan D.
SSL/TLS Session-Aware User Authentication Using a GAA Bootstrapped Key Chunhua Chen1 , Chris J.mitchell@rhul.ac.uk Abstract. Most SSL/TLS-based electronic commerce (e-commerce) ap- plications (including Internet banking a server effectively, and because user authentication methods are typi- cally decoupled from SSL
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
configurations are an internal combustion engine, electric motor, transmission and battery pack maximizing fuel economy in HEV's is a primary objective, the combustion engine is typi- cally a smaller displacement, lower number of cylinder engine. Furthermore, integration methods to achieve increased
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
S O C I A L S C I E N C E Genesis of Suicide Terrorism
Paris-Sud XI, Université de
- vilian--populations to effect political change. Although a suicide attack aims to physically destroy an initial target, its primary use is typi- cally as a weapon of psychological war- fare intended to af- fect, but those made to witness it. The enemy's own information media amplify the attack's effects to the larger
Braess, Dietrich
ÂSSOR preconditioners are an appropriate tool. INTRODUCTION In groundwater flow simulations great systems of linear models for groundwater flow problems are performed, one has typiÂ cally domains whose projection onto groundwater is transported, has a thickness of about 10 to 100 m. To achieve a good model of the geological
Liskiewicz, Maciej
. Logging residues are typi- cally chipped and then transported to facilities where they are used for fuel Operations and Biomass Utilization, Forest Resources and Environmental Conservation, Virginia Tech W. Michael Aust, Professor, Forest Hydrology, Forest Resources and Environmental Conservation, Virginia Tech M
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
Static Consistency Checking for Distributed Specifications
Finkelstein, Anthony
Static Consistency Checking for Distributed Specifications Christian Nentwich, Wolfgang Emmerich, UK {c.nentwich,w.emmerich,a.finkelstein}@cs.ucl.ac.uk Abstract Software engineers building a complex
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.
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
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
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
Consistence beats causality in recommender systems
Zhu, Xuzhen; Hu, Zheng; Zhang, Ping; Zhou, Tao
2015-01-01T23:59:59.000Z
The explosive growth of information challenges people's capability in finding out items fitting to their own interests. Recommender systems provide an efficient solution by automatically push possibly relevant items to users according to their past preferences. Recommendation algorithms usually embody the causality from what having been collected to what should be recommended. In this article, we argue that in many cases, a user's interests are stable, and thus the previous and future preferences are highly consistent. The temporal order of collections then does not necessarily imply a causality relationship. We further propose a consistence-based algorithm that outperforms the state-of-the-art recommendation algorithms in disparate real data sets, including \\textit{Netflix}, \\textit{MovieLens}, \\textit{Amazon} and \\textit{Rate Your Music}.
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.
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.
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
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.
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.
alternating chemoradiotherapy consisting: Topics by E-print Network
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Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...
aortic rupture consisting: Topics by E-print Network
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Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...
archaeological record consistent: Topics by E-print Network
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Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...
air regulations consistency: Topics by E-print Network
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Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...
Decentralized Storage Consistency via Versioning Servers Garth Goodson,
, consistency protocol, versioning servers, distributed systems #12; Introduction Survivable storage systems (e produce garbage. Protocols exist for achieving such consistency, they generally involve significant extra], survival client compromises [34]. Further, implemented with minimal performance cost ( [34] and capacity
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.
ORCHIS: CONSISTENCY-DRIVEN DATA QUALITY MANAGEMENT IN SENSING SYSTEMS
Shi, Weisong
Sensing Data Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . 29 3.3 Related Energy Efficiency Design . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.4 Related Data Consistency Models
Software Agent Architecture for Consistency Management in Distributed Documents
Finkelstein, Anthony
Software Agent Architecture for Consistency Management in Distributed Documents Anthony Finkelstein an account of an architecture for management of consistency relations between distributed documents. We of use of this system in a domain of software engineering documents. Keywords Consistency management, XML
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
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 ...
Consistent inventory control Elvira Marie B. Aske,, and Sigurd Skogestad,
Skogestad, Sigurd
Consistent inventory control Elvira Marie B. Aske,, and Sigurd Skogestad, Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, Norway Abstract Inventory or material of this paper is to propose the more general local- consistency rule for evaluating inventory control systems
Consistent Query Answers in Inconsistent Databases Marcelo Arenas
Bertossi, Leopoldo
is proved as well. 1 Introduction Integrity constraints capture an important normative aspect of every of consistent answer in a relational database that may violate given integrity constraints. This notion are consistent with the integrity constraints and which are not. In this pa per, we provide a logical
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
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.
Market-Consistent Valuation of Long-Term Insurance Contracts -
Pfeifer, Holger
Market-Consistent Valuation of Long-Term Insurance Contracts - Valuation Framework-Consistent Valuation of Long-Term Insurance Contracts Valuation Framework and Application to German Private Health with respect to prot sharing rules and premium adjustment mechanisms. In contrast to the valuation of life
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
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 blind protein structure generation from NMR chemical shift data
Baker, David
Consistent blind protein structure generation from NMR chemical shift data Yang Shen*, Oliver Lange been successfully applied in a blind manner to nine protein targets with molecular masses up to 15.4 k
Data Structures for Generalised Arc Consistency for Extensional Constraints
St Andrews, University of
the extensional representation remains the most effective way to model a facet of a problem it is essential and structured problems. 2 Background The finite-domain constraint satisfaction problem (CSP) consists of
Using XML to Build Consistency Rules for Distributed Specifications
Finkelstein, Anthony
Using XML to Build Consistency Rules for Distributed Specifications Andrea Zisman Wolfgang Emmerich)20 76794413 a.zisman@soi.city.ac.uk {w.emmerich | a.finkelstein}@cs.ucl.ac.uk ABSTRACT The work presented
Flexible Consistency Checking Christian Nentwich, Wolfgang Emmerich, Anthony Finkelstein
Finkelstein, Anthony
Flexible Consistency Checking Christian Nentwich, Wolfgang Emmerich, Anthony Finkelstein Department of Computer Science University College London Gower Street, London, WC1E 6BT UK {c.nentwich,w.emmerich
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 ...
The EIS process consists of several steps, each with
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
EIS process consists of several steps, each with opportunities for you to get involved. BPA follows these six steps for EISs on projects, plans and policies. 1. Notice of Intent...
Consistent description of kinetics and hydrodynamics of dusty plasma
Markiv, B. [Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv (Ukraine)] [Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv (Ukraine); Tokarchuk, M. [Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv (Ukraine) [Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv (Ukraine); National University “Lviv Polytechnic,” 12 Bandera St., 79013 Lviv (Ukraine)
2014-02-15T23:59:59.000Z
A consistent statistical description of kinetics and hydrodynamics of dusty plasma is proposed based on the Zubarev nonequilibrium statistical operator method. For the case of partial dynamics, the nonequilibrium statistical operator and the generalized transport equations for a consistent description of kinetics of dust particles and hydrodynamics of electrons, ions, and neutral atoms are obtained. In the approximation of weakly nonequilibrium process, a spectrum of collective excitations of dusty plasma is investigated in the hydrodynamic limit.
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.
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.
Self-consistent quasiparticle model for quark-gluon plasma
Vishnu M. Bannur
2006-09-19T23:59:59.000Z
Here we present a self-consistent quasi-particle model for quark-gluon plasma and apply it to explain the non-ideal behaviour seen in lattice simulations. The basic idea, borrowed from electrodynamic plasma, is that the gluons acquire mass as it propagates through plasma due to collective effects and is approximately equal to the plasma frequency. The statistical mechanics and thermodynamics of such a system is studied by treating it as an ideal gas of massive gluons. Since mass or plasma frequency depends on density, which itself is a thermodynamic quantity, the whole problem need to be solved self-consistently.
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
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
Self-consistent quasi-particle model for relativistic plasma
Vishnu M. Bannur
2006-02-24T23:59:59.000Z
Relativistic plasma with radiation at thermodynamic equilibrium is ageneral system of interest in astrophysics and high energy physics. We develop a new self-consistent quasi-particle model for such a system to take account of collective behaviour of plasma andthermodynamic properties are derived. It is applied to electrodynamic plasma and quark gluon plasma and compared with existing results.
Dynamic Path Consistency for Spatial Reasoning Lamia Belouaer, Maroua Bouzid
Boyer, Edmond
Ontology of a given environment. In order to evaluate the performance of our dynamic path consistency method, we reactive planning and path finding. Let us consider the example of an accident at a nuclear plant. Generally if something goes wrong there are always planned paths from any position in the nuclear plant
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
Effective Collaboration and Consistency Management in Business Process Modeling
Czarnecki, Krzysztof
Effective Collaboration and Consistency Management in Business Process Modeling Co-Chairs: Moises they are lost. Business Process Modeling (BPM) is a promising approach to enable agility in business process of experts. Business analysts gather requirements and create high-level process models. Solution architects
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.
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
Summary of residential environmental issues and program consistency
Baechler, M C
1989-05-01T23:59:59.000Z
The Northwest Power Planning Act authorizes the Bonneville Power Administration to acquire all necessary energy resources to serve Northwest utilities choosing to acquire power from the agency and to give conservation the highest priority in responding to the demand for electricity. To meet this mandate, the agency has established residential conservation programs for weatherizing existing homes, building new energy-efficient homes, and promoting energy-efficient appliances. Pacific Northwest Laboratory prepared this report to compare and contrast the environmental requirements and issues involving Bonneville's residential conservation programs. The key environmental concern confronting each of the programs with measures aimed at reducing air leakage rates in houses (both new and existing) is indoor air quality (IAQ). This report reviews the similarity and consistency of the programs' approach to IAQ, their impacts, program features, mitigation techniques, and new information about IAQ and other potential environmental issues confronting the programs. The information is intended for use in comparing and contrasting how environmental features mesh with other program features, checking consistency across programs and determining whether it makes sense for programs to be consistent, determining consistency between programs, and providing information to aid program planning in light of potential environmental issues and new information. 31 refs.
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
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.
Infrared self-consistent solutions of bispinor QED3
Tomasz Radozycki
2013-01-25T23:59:59.000Z
Quantum electrodynamics in three dimensions in the bispinor formulation is considered. It is shown that the Dyson-Schwinger equations for fermion and boson propagators may be self-consistently solved in the infrared domain if on uses the Salam's vertex function. The parameters defining the behavior of the propagators are found numerically for different values of coupling constant and gauge parameter. For weak coupling the approximated analytical solutions are obtained. The renormalized gauge boson propagator (transverse part) is shown in the infrared domain to be practically gauge independent.
Discrete KP equation with self-consistent sources
Adam Doliwa; Runliang Lin
2014-04-05T23:59:59.000Z
We show that the discrete Kadomtsev-Petviashvili (KP) equation with sources obtained recently by the "source generalization" method can be incorporated into the squared eigenfunction symmetry extension procedure. Moreover, using the known correspondence between Darboux-type transformations and additional independent variables, we demonstrate that the equation with sources can be derived from Hirota's discrete KP equations but in a space of higher dimension. In this way we uncover the origin of the source terms as coming from multidimensional consistency of the Hirota system itself.
Multi-writer consistency conditions for shared memory objects
Shao, Cheng
2008-10-10T23:59:59.000Z
system composed of n application processes, p0;:::;pn¡1, and some number of shared objects. In this thesis, we focus on read/write registers. Such a register, x, supports two operations, read and write, which can be executed by the processes. Each... and responses, we denote by ji the subsequence of containing all the invocations and responses performed by process pi. Deflnition 2 A sequence of invocations and responses is a schedule if, for each i, 0 • i < n, the following hold: † ji consists...
Multi-writer consistency conditions for shared memory objects
Shao, Cheng
2009-05-15T23:59:59.000Z
system composed of n application processes, p0;:::;pn?1, and some number of shared objects. In this thesis, we focus on read/write registers. Such a register, x, supports two operations, read and write, which can be executed by the processes. Each... and responses, we denote by ji the subsequence of containing all the invocations and responses performed by process pi. Deflnition 2 A sequence of invocations and responses is a schedule if, for each i, 0 ? i < n, the following hold: ? ji consists...
Self-consistent input-output formulation of quantum feedback
Yanagisawa, M. [Department of Engineering, The Australian National University, Canberra, ACT 0200 (Australia); Hope, J. J. [Department of Quantum Science, The Australian National University, Canberra, ACT 0200 (Australia)
2010-12-15T23:59:59.000Z
A simple method of analyzing quantum feedback circuits is presented. The classical analysis of feedback circuits can be generalized to apply to quantum systems by mapping the field operators of various outputs to other inputs via the standard input-output formalism. Unfortunately, this has led to unphysical results such as the violation of the Heisenberg uncertainty principle for in-loop fields. This paper shows that this general approach can be redeemed by ensuring a self-consistently Hermitian Hamiltonian. The calculations are based on a noncommutative calculus of operator derivatives. A full description of several examples of quantum linear and nonlinear feedback for optical systems is presented.
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.
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.
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.
Self-consistent chemical model of partially ionized plasmas
Arkhipov, Yu. V.; Baimbetov, F. B.; Davletov, A. E. [Department of Physics, Kazakh National University, Tole Bi 96, Almaty 050012 (Kazakhstan)
2011-01-15T23:59:59.000Z
A simple renormalization theory of plasma particle interactions is proposed. It primarily stems from generic properties of equilibrium distribution functions and allows one to obtain the so-called generalized Poisson-Boltzmann equation for an effective interaction potential of two chosen particles in the presence of a third one. The same equation is then strictly derived from the Bogolyubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy for equilibrium distribution functions in the pair correlation approximation. This enables one to construct a self-consistent chemical model of partially ionized plasmas, correctly accounting for the close interrelation of charged and neutral components thereof. Minimization of the system free energy provides ionization equilibrium and, thus, permits one to study the plasma composition in a wide range of its parameters. Unlike standard chemical models, the proposed one allows one to study the system correlation functions and thereby to obtain an equation of state which agrees well with exact results of quantum-mechanical activity expansions. It is shown that the plasma and neutral components are strongly interrelated, which results in the short-range order formation in the corresponding subsystem. The mathematical form of the results obtained enables one to both firmly establish this fact and to determine a characteristic length of the structure formation. Since the cornerstone of the proposed self-consistent chemical model of partially ionized plasmas is an effective pairwise interaction potential, it immediately provides quite an efficient calculation scheme not only for thermodynamical functions but for transport coefficients as well.
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.
ER=EPR, GHZ, and the Consistency of Quantum Measurements
Leonard Susskind
2014-12-29T23:59:59.000Z
This paper illustrates various aspects of the ER=EPR conjecture.It begins with a brief heuristic argument, using the Ryu-Takayanagi correspondence, for why entanglement between black holes implies the existence of Einstein-Rosen bridges. The main part of the paper addresses a fundamental question: Is ER=EPR consistent with the standard postulates of quantum mechanics? Naively it seems to lead to an inconsistency between observations made on entangled systems by different observers. The resolution of the paradox lies in the properties of multiple black holes, entangled in the Greenberger-Horne-Zeilinger pattern. The last part of the paper is about entanglement as a resource for quantum communication. ER=EPR provides a way to visualize protocols like quantum teleportation. In some sense teleportation takes place through the wormhole, but as usual, classical communication is necessary to complete the protocol.
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...
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 ...
Environment--Induced Decoherence, Classicality and Consistency of Quantum Histories
Juan Pablo Paz; Wojciech Hubert Zurek
1993-04-20T23:59:59.000Z
We prove that for an open system, in the Markovian regime, it is always possible to construct an infinite number of non trivial sets of histories that exactly satisfy the probability sum rules. In spite of being perfectly consistent, these sets manifest a very non--classical behavior: they are quite unstable under the addition of an extra instant to the list of times defining the history. To eliminate this feature --whose implications for the interpretation of the formalism we discuss-- and to achieve the stability that characterizes the quasiclassical domain, it is necessary to separate the instants which define the history by time intervals significantly larger than the typical decoherence time. In this case environment induced superselection is very effective and the quasiclassical domain is characterized by histories constructed with ``pointer projectors''.
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.
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_{\\...
IMPROVING CONSISTENCY OF PERFORMANCE ASSESSMENTS IN THE DOE COMPLEX
Seitz, R; Elmer Wilhite, E
2009-01-20T23:59:59.000Z
The low-level waste (LLW) performance assessment (PA) process has been traditionally focused on disposal facilities at a few United States Department of Energy (USDOE) sites and commercial disposal facilities. In recent years, there has been a dramatic increase in the scope of the use of PA-like modeling approaches, involving multiple activities, facilities, contractors and regulators. The scope now includes, for example: (1) National Environmental Policy Act (NEPA) assessments, (2) CERCLA disposal cells, (3) Waste Determinations and High-Level Waste (HLW) Closure activities, (4) Potential on-site disposal of Transuranic (TRU) waste, and (5) In-situ decommissioning (including potential use of existing facilities for disposal). The dramatic increase in the variety of activities requiring more detailed modeling has resulted in a similar increase in the potential for inconsistency in approaches both at a site and complexwide scale. This paper includes a summary of USDOE Environmental Management (EM) sponsored initiatives and activities for improved consistency. New initiatives entitled the Performance Assessment Community of Practice and Performance Assessment Assistance Team are also introduced.
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.
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.
Towards consistent Electroweak Precision Data constraints in the SMEFT
Laure Berthier; Michael Trott
2015-02-09T23:59:59.000Z
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.
Consistent neutron kinetics data generation for nodal transient calculations
Akdeniz, B. [Penn State Univ., Nuclear Engineering Program, Univ. Park, PA 16802 (United States); Mueller, E.; Panayotov, D. [Westinghouse Electric Sweden, SE - 721 63 Vaesteraas (Sweden); Ivanov, K. N. [Penn State Univ., Nuclear Engineering Program, Univ. Park, PA 16802 (United States)
2006-07-01T23:59:59.000Z
Current three-dimensional transient codes for thermal reactors are mostly based on two-group diffusion-theory nodal models. In the two-group approach no explicit distinction is made between prompt fission neutrons and delayed neutrons. Consequently, effective delayed neutron fractions have traditionally been used in an attempt to compensate for this shortcoming. A fundamentally better approach would be to solve the nodal kinetics equations in a sufficient number of energy groups to explicitly capture neutron emission spectrum effects. However, this would require the availability of a multi-group nodal transient code as well as a lattice code to generate the appropriate multi-group nodal data for the simulator. One such simulator is the PARCS nodal transient code, which is widely used and recognized as representative of the current state-of-the-art. Unfortunately, a proper nodal data preparation path between PARCS and a lattice code is not available. Even though several industrial lattice codes could be considered as candidates, most of them are tailored to producing two-group nodal data and would require modifications to produce multi-group prompt and delayed neutron emission spectra. In this paper, the particular modifications required to match the TransLAT lattice code and the PARCS nodal transient code for BWR transient applications are reported. Some modifications to PARCS were also required to make two-group and multi-group applications fully consistent. Numerical results are presented both to verify the proper functioning of these modifications and to illuminate the impact of various nodal kinetics data approximations in a selected transient calculation. In particular, the significance of blending rodded and un-rodded kinetics data in partially rodded nodes is demonstrated. It is also confirmed that the use of delayed neutron importance factors in two-group calculations notably reduces the differences between two-group and multi-group kinetics calculations. (authors)
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
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...
DECOUPLED ENERGY STABLE SCHEMES FOR A PHASE-FIELD ...
2014-04-24T23:59:59.000Z
cally consistent phase-field model that admits an energy law. ... numerical schemes which do not respect the energy dissipation laws may be “overloaded” with ...
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...
Munday, David Alexander
2013-01-01T23:59:59.000Z
1–17, Sept. 2006. [35] Derek Hower. Acoherent shared memory.memory consistency models. Derek Hower [35] pro- posed the
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
scheduler has been implemented as the default schedÂ uler of CHIMERA II, a realÂtime operating system being as the default scheduler of the CHIMERA II Real Time Operating System[8]. It is being used to control several
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
A generalized self consistent model for effective elastic moduli of human dentine
Qin, Qinghua
Consistent Model for cell model of fiber-reinforced composites is extended to the case of hollow cylinder model and the corresponding cell model is chosen to consist of a circular hollow cylinder filled from other models such as nano-indentation method. Ã? 2006 Elsevier Ltd. All rights reserved. Keywords
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
Consistent parametric estimation of the intensity of a spatial-temporal point process.
Schoenberg, Frederic Paik (Rick)
Consistent parametric estimation of the intensity of a spatial-temporal point process. Frederic under which parametric estimates of the intensity of a spatial-temporal point process are consistent. Although the actual point process being estimated may not be Poisson, an estimate involving maximizing
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.
Collins, Kent Michael
1995-01-01T23:59:59.000Z
This thesis documents efforts to validate two elements related to an operating-speed-based geometric design consistency evaluation procedure: (1) the speed reduction estimation ability of the model, and (2) assumptions about acceleration...
Analysis of Dual Consistency for Discontinuous Galerkin Discretizations of Source Terms
Darmofal, David L.
The effects of dual consistency on discontinuous Galerkin discretizations of solution and solution gradient dependent source terms are examined. Two common discretizations are analyzed: the standard weighting technique for ...
van der Hoek, AndrÃ©
Consistency Management with Repair Actions Christian Nentwich, Wolfgang Emmerich and Anthony Finkelstein Department of Computer Science University College London Gower Street, London WC1E 6BT, UK {c.nentwich,w.emmerich
Learning Globally Consistent Maps by Relaxation Tom Duckett Stephen Marsland & Jonathan Shapiro
Duckett, Tom
Learning Globally Consistent Maps by Relaxation #3; Tom Duckett Stephen Marsland & Jonathan Shapiro-70182 Orebro Manchester M13 9PL Sweden England Tom.Duckett@aass.oru.se fmarslans
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 ...
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...
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.
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.
Feng, X.; Hrma, P.; Kim, D. [Pacific Northwest National Lab., Richland, WA (United States)] [and others
1996-12-31T23:59:59.000Z
The current approach to assessing chemical durability of waste glasses focuses on a suite of short-term laboratory tests such as dynamic single-pass flow-through (SPFT) tests, static product consistency tests (PCT), and vapor hydration tests. The behavior of the glasses in the three types of tests is quite different, but each test provides insight into the glass corrosion process. The PCT data showed that at constant alumina, silica, and sodium levels the glass durability order for different glass systems is: Boron-series > Boron-Calcium-series > Calcium-series, while the opposite order is observed in SPFT tests. The order for vapor hydration tests is similar to that observed in the PCT tests. The PCT results are consistent with the current understanding of glass structure and are consistent with vapor hydration tests. The SPFT results can be explained using arguments based on solution chemistry.
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.
DIRHB -- a relativistic self-consistent mean-field framework for atomic nuclei
T. Niksic; N. Paar; D. Vretenar; P. Ring
2014-03-17T23:59:59.000Z
The DIRHB package consists of three Fortran computer codes for the calculation of the ground-state properties of even-even atomic nuclei using the framework of relativistic self-consistent mean-field models. Each code corresponds to a particular choice of spatial symmetry: the DIRHBS, DIRHBZ and DIRHBT codes are used to calculate nuclei with spherical symmetry, axially symmetric quadrupole deformation, and triaxial quadrupole shapes, respectively. Reflection symmetry is assumed in all three cases. The latest relativistic nuclear energy density functionals are implemented in the codes, thus enabling efficient and accurate calculations over the entire nuclide chart.
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.
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.
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.
Zachmann, Gabriel
. Consistent Normal Orientation for Polygonal Meshes Pavel Borodin Gabriel Zachmann Reinhard Klein Institute
Full paper / Mmoire Self-assembly of hybrid solids consisting of 2D supramolecular
Paik Suh, Myunghyun
Full paper / Mémoire Self-assembly of hybrid solids consisting of 2D supramolecular networks- selected molecular building blocks may yield designed supramolecular structure in one-pot process. We have been interested in construction of the materials, where two species with different properties coexist
Neonatal Hearing Screening Test Consistent with loss in one or both ears within frequency range
Levin, Judith G.
Neonatal Hearing Screening Test Consistent with loss in one or both ears within frequency range: Gene specific mutation screening If familial and nonsyndromal is suspected, consider: GJB2 testing GJB6 testing CMV testing Environmental etiologies Gene specific screening may be warranted If nonsyndromal
Training Reciprocity Achieves Greater Consistency, Saves Time and Money for Idaho, Other DOE Sites
Broader source: Energy.gov [DOE]
IDAHO FALLS, Idaho – Contracting companies supporting EM’s cleanup program at the Idaho site volunteered to be among the first to use a new DOE training reciprocity program designed to bring more consistency to health and safety training across the complex, reduce redundancy and realize savings and other efficiencies.
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
Collective spin modes in monodimensional magnonic crystals consisting of dipolarly coupled nanowires
Adeyeye, Adekunle
encompassing several Brillouin zones relative to the artificial spatial periodicity. This experimental evidence determined by the artificial periodicity. Alternating nanowires of polycrystalline Permalloy Ni80Fe20 exposure wavelength followed by a lift-off technique.4 Sample consists of nanowires of widths w1=350 nm
temperature differences exist between the day and night faces of the planet, consistent with a model
Carpick, Robert W.
with a model in which very little horizontal energy transport occurs in the planetary atmosphere. Furthermoretemperature differences exist between the day and night faces of the planet, consistent. 626, 523 (2005). 3. There is no official terminology for planets that orbit close to their parent
Consistent off-shell $?N N$ vertex and nucleon self-energy
S. Kondratyuk; O. Scholten
1998-11-05T23:59:59.000Z
We present a consistent calculation of half-off-shell form factors in the pion-nucleon vertex and the nucleon self-energy. Numerical results are presented. Near the on-shell point the pion-nucleon vertex is dominated by the pseudovector coupling, while at large nucleon invariant masses we find a sizable pseudoscalar admixture.
Sufficient Criteria for Consistent Behavior Modeling with Refined Activity Diagrams: Long Version
Wichmann, Felix
,taentzer}@mathematik.uni-marburg.de 3 Siemens AG, Corporate Technology, Germany, katharina.mehner@siemens.com Abstract. In use case on the theory of graph transformation and paves the ground for a consistency analysis of the required system by a tool for graph transformation. 1 Introduction Requirements engineering is the process of gathering
Estimating GRACE monthly water storage change consistent with hydrology by assimilating hydrological
Stuttgart, UniversitÃ¤t
Estimating GRACE monthly water storage change consistent with hydrology by assimilating hydrological information B. Devaraju, N. Sneeuw Institute of Geodesy, UniversitÂ¨at Stuttgart, Germany estimates of mass changes with observed hydrological data, which is available for 20% of the land area
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.
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 and feedback of land surface and atmospheric processes over large space and time scales. Remote sensing-based variables including soil moisture (from AMSR-E), surface heat fluxes (from MODIS) and precipitation rates
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
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
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
1. THE RADIATION BELTS The outer zone radiation belts consist of energetic elec-
Elkington, Scot R.
1. THE RADIATION BELTS The outer zone radiation belts consist of energetic elec- trons trapped in the geomagnetic field. The dynamics of the belts are dictated by the global and local electric and mag- netic electrons in the outer zone and electric and magnetic field variations occurring on ULF time scales
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
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
Florida, University of
, taking up carbon dioxide and nutrients from the water and using light as an energy source. The microalgaePhytoplankton consists of one-celled marine and freshwater microalgae and other plant microalgae species (Hoff and Snell, 2008). Species Temperature (°C) Light (Lux) Salinity (ppt ) Chaetoceros
Paris-Sud XI, Université de
UNSUPERVISED MINING OF AUDIOVISUALLY CONSISTENT SEGMENTS IN VIDEOS WITH APPLICATION TO STRUCTURE technique is proposed to discover repeating video segments exhibiting audio and visual con- sistency accurate detection of the underlying event throughout the video. Event min- ing is applied to unsupervised
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 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
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.
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
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.
Yokoi, N. [Institute of Industrial Science, University of Tokyo, Tokyo (Japan)] [Institute of Industrial Science, University of Tokyo, Tokyo (Japan); Higashimori, K.; Hoshino, M. [Department of Earth and Planetary Science, University of Tokyo, Tokyo (Japan)] [Department of Earth and Planetary Science, University of Tokyo, Tokyo (Japan)
2013-12-15T23:59:59.000Z
Through the enhancement of transport, turbulence is expected to contribute to the fast reconnection. However, the effects of turbulence are not so straightforward. In addition to the enhancement of transport, turbulence under some environment shows effects that suppress the transport. In the presence of turbulent cross helicity, such dynamic balance between the transport enhancement and suppression occurs. As this result of dynamic balance, the region of effective enhanced magnetic diffusivity is confined to a narrow region, leading to the fast reconnection. In order to confirm this idea, a self-consistent turbulence model for the magnetic reconnection is proposed. With the aid of numerical simulations where turbulence effects are incorporated in a consistent manner through the turbulence model, the dynamic balance in the turbulence magnetic reconnection is confirmed.
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.
Comparison of Self-Consistent Skyrme and Gogny Calculations for Light Hg Isotopes
M. Warda; A. Staszczak; L. Próchniak
2011-07-05T23:59:59.000Z
The ground-state properties of neutron-deficient Hg isotopes have been investigated by the constrained self-consistent Hartree-Fock-Bogoliubov approach with the Skyrme and Gogny effective forces. In the case of the Skyrme interaction we h ave also applied the Hartree-Fock+BCS model with the state-dependent $\\delta$-pairing interaction. Potential energy surfaces and pairing properties have been compared for the both types of forces.
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.
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.
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.
Michael Brown; Ian Whittingham
2015-03-30T23:59:59.000Z
Approximations based on two-particle irreducible (2PI) effective actions (also known as $\\Phi$-derivable, Cornwall-Jackiw-Tomboulis or Luttinger-Ward functionals depending on context) have been widely used in condensed matter and non-equilibrium quantum/statistical field theory because this formalism gives a robust, self-consistent, non-perturbative and systematically improvable approach which avoids problems with secular time evolution. The strengths of 2PI approximations are often described in terms of a selective resummation of Feynman diagrams to infinite order. However, the Feynman diagram series is asymptotic and summation is at best a dangerous procedure. Here we show that, at least in the context of a toy model where exact results are available, the true strength of 2PI approximations derives from their self-consistency rather than any resummation. This self-consistency allows truncated 2PI approximations to capture the branch points of physical amplitudes where adjustments of coupling constants can trigger an instability of the vacuum. This, in effect, turns Dyson's argument for the failure of perturbation theory on its head. As a result we find that 2PI approximations perform better than Pad\\'e approximation, but not as well as Borel summation where the latter is well-defined. Finally, we introduce a hybrid 2PI-Pad\\'e method.
Cuniberti, Gianaurelio
an analytical theory for this case. This theory is based on the self-consistent Born approximation SCBA , which
Some exploitations of the self-consistent QRPA approach with the Gogny force
Peru, S.; Martini, M.; Dupuis, M. [CEA,DAM, DIF, F-91297 Arpajon (France); Institut d'Astronomie et d'Astrophysique, Universite Libre de Bruxelles, CP-226, 1050 Brussels, Belgium and CEA,DAM, DIF, F-91297 Arpajon (France); CEA,DAM, DIF, F-91297 Arpajon (France)
2012-10-20T23:59:59.000Z
Fully consistent axially-symmetric-deformed quasiparticle random phase approximation calculations have been performed with the D1S Gogny force. Giant resonances in exotic nuclei as well as in deformed Mg and Si isotopes have been studied. Dipole responses have been calculated in Ne isotopes and N=16 isotones to study the existence of soft dipole modes in exotic nuclei. The same formalism has been used to describe multipole responses up to octupole in the deformed and heavy nucleus {sup 238}U. Low energy spectroscopy of nickel isotopes has been studied, revealing 0{sup +} states which display a particular structure.
Color-spin locking in a self-consistent Dyson-Schwinger approach
Florian Marhauser; Dominik Nickel; Michael Buballa; Jochen Wambach
2007-03-30T23:59:59.000Z
We investigate the color-spin locked (CSL) phase of spin-one color- superconducting quark matter using a truncated Dyson-Schwinger equation for the quark propagator in Landau gauge. Starting from the most general parity conserving ansatz allowed by the CSL symmetry, the Dyson-Schwinger equation is solved self-consistently and dispersion relations are discussed. We find that chiral symmetry is spontaneously broken due to terms which have previously been neglected. As a consequence, the excitation spectrum contains only gapped modes even for massless quarks. Moreover, at moderate chemical potentials the quasiparticle pairing gaps are several times larger than expected from extrapolated weak-coupling results.
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.
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.
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.
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.
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
BILIWG: Consistent "Figures of Merit" (Presentation) | Department of Energy
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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.
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.
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.
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.
Self-consistent description of single-particle levels of magic nuclei
N. V. Gnezdilov; I. N. Borzov; E. E. Saperstein; S. V. Tolokonnikov
2014-04-04T23:59:59.000Z
Single-particle levels of seven magic nuclei are calculated within the Energy Density Functional (EDF) method by Fayans et al. Three versions of the EDF are used, the initial Fayans functional DF3 and its two variations, DF3-a and DF3-b, with different values of spin-orbit parameters. Comparison is made with predictions of the Skyrme-Hartree-Fock method with the HFB-17 functional. For the DF3-a functional, phonon coupling (PC) corrections to single-particle energies are found self-consistently with an approximate account for the tadpole diagram. Account for the PC corrections improves agreement with the data for heavy nuclei, e.g. for 208 Pb. On the other hand, for lighter nuclei, e.g. 40,48 Ca, PC corrections make the agreement a little worse. As estimations show, the main reason is that the approximation we use for the tadpole term is less accurate for the light nuclei.
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.
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.
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.
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.
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.
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.
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)...
Schad, A; Roth, M
2013-01-01T23:59:59.000Z
We use a novel global helioseismic analysis method to infer the meridional flow in the deep Solar interior. The method is based on the perturbation of eigenfunctions of Solar p modes due to meridional flow. We apply this method to time series obtained from Dopplergrams measured by the Michelson Doppler Imager aboard the Solar and Heliospheric Observatory (SOHO) covering the observation period 2004-2010. Our results show evidence that the meridional flow reaches down to the base of the convection zone. The flow profile has a complex spatial structure consisting of multiple flow cells distributed in depth and latitude. Toward the Solar surface, our results are in good agreement with flow measurements from local helioseismology.
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.
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.
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.
Feng, Ling; Hu, Yanqing
2015-01-01T23:59:59.000Z
Interdependent networks are ubiquitous in our society, ranging from infrastructure to economics, and the study of their cascading behaviors using percolation theory has attracted much attention in the recent years. To analyze the percolation phenomena of these systems, different mathematical frameworks have been proposed including generating functions, eigenvalues among some others. These different frameworks approach the phase transition behaviors from different angles, and have been very successful in shaping the different quantities of interest including critical threshold, size of the giant component, order of phase transition and the dynamics of cascading. These methods also vary in their mathematical complexity in dealing with interdependent networks that have additional complexity in terms of the correlation among different layers of networks or links. In this work, we review a particular approach of simple self-consistent probability equations, and illustrate that it can greatly simplify the mathemati...
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.
Flip, A. [CEA, Cadarache (France); Pang, H.F. [Tsinghua Univ., Beijing (China); D`Angelo, A. [ENEA, Roma (Italy)
1995-12-31T23:59:59.000Z
Due to the persistent uncertainties: {approximately} 5 % (the uncertainty, here and there after, is at 1{sigma}) in the prediction of the `reactivity scale` ({beta}{sub eff}) for a fast power reactor, an international project was recently initiated in the framework of the OECD/NEA activities for reevaluation, new measurements and integral benchmarking of delayed neutron (DN) data and related kinetic parameters (principally {beta}{sub eff}). Considering that the major part of this uncertainty is due to uncertainties in the DN yields (v{sub d}) and the difficulty for further improvement of the precision in differential (e.g. Keepin`s method) measurements, an international cooperative strategy was adopted aiming at extracting and consistently interpreting information from both differential (nuclear) and integral (in reactor) measurements. The main problem arises from the integral side; thus the idea was to realize {beta}{sub eff} like measurements (both deterministic and noise) in `clean` assemblies. The `clean` calculational context permitted the authors to develop a theory allowing to link explicitly this integral experimental level with the differential one, via a unified `Master Model` which relates v{sub d} and measurables quantities (on both levels) linearly. The combined error analysis is consequently largely simplified and the final uncertainty drastically reduced (theoretically, by a factor {radical}3). On the other hand the same theoretical development leading to the `Master Model`, also resulted in a structured scheme of approximations of the general (stochastic) Boltzmann equation allowing a consistent analysis of the large range of measurements concerned (stochastic, dynamic, static ... ). This paper is focused on the main results of this theoretical development and its application to the analysis of the Preliminary results of the BERENICE program ({beta}{sub eff} measurements in MASURCA, the first assembly in CADARACHE-FRANCE).
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.
Shedding light on the prompt high efficiency paradox - self consistent modeling of GRB afterglows
Beniamini, Paz; Duran, Rodolfo Barniol; Piran, Tsvi
2015-01-01T23:59:59.000Z
We examine GRBs with both Fermi-LAT and X-ray afterglow data. Assuming that the 100MeV (LAT) emission is radiation from cooled electrons accelerated by external shocks, we show that the kinetic energy of the blast wave estimated from the 100MeV flux is 50 times larger than the one estimated from the X-ray flux. This can be explained if either: i) electrons radiating at X-rays are significantly cooled by SSC (suppressing the synchrotron flux above the cooling frequency) or ii) if the X-ray emitting electrons, unlike those emitting at 100MeV energies, are in the slow cooling regime. In both cases the X-ray flux is no longer an immediate proxy of the blast wave kinetic energy. We model the LAT, X-ray and optical data and show that in general these possibilities are consistent with the data, and explain the apparent disagreement between X-ray and LAT observations. All possible solutions require weak magnetic fields: $10^{-6}energy...
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.
Consistency of Perfect Fluidity and Jet Quenching in semi-Quark-Gluon Monopole Plasmas
Jiechen Xu; Jinfeng Liao; Miklos Gyulassy
2015-03-31T23:59:59.000Z
We utilize a new framework, CUJET3.0, to deduce the energy and temperature dependence of jet transport parameter, $\\hat{q}(E>10\\; {\\rm GeV},T)$, from a combined analysis of available data on nuclear modification factor and azimuthal asymmetries from RHIC/BNL and LHC/CERN on high energy nuclear collisions. Extending a previous perturbative-QCD based jet energy loss model (known as CUJET2.0) with (2+1)D viscous hydrodynamic bulk evolution, this new framework includes three novel features of nonperturbative physics origin: (1) the Polyakov loop suppression of color-electric scattering (aka "semi-QGP" of Pisarski et al) and (2) the enhancement of jet scattering due to emergent magnetic monopoles near $T_c$ (aka "magnetic scenario" of Liao and Shuryak) and (3) thermodynamic properties constrained by lattice QCD data. CUJET3.0 reduces to v2.0 at high temperatures $T > 400$ MeV, but greatly enhances $\\hat{q}$ near the QCD deconfinement transition temperature range. This enhancement accounts well for the observed elliptic harmonics of jets with $p_T>10$ GeV. Extrapolating our data-constrained $\\hat{q}$ down to thermal energy scales, $E \\sim 2$ GeV, we find for the first time a remarkable consistency between high energy jet quenching and bulk perfect fluidity with $\\eta/s\\sim T^3/\\hat{q} \\sim 0.1$ near $T_c$.
On the consistency of QCBED structure factor measurements for TiO2 (Rutile)
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Spence, J.C.H [Arizona State University; Friis, J. [Norwegian University of Science and Technology; Zuo, J.M [University of Illinois, Urbana, IL; Jiang, B.
2003-10-01T23:59:59.000Z
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.
Self-consistent modeling of DC and microwave nitrogen discharges and their afterglows
Guerra, Vasco [Centro de Fisica dos Plasmas, Instituto Superior Tecnico, 1049-001 Lisbon (Portugal)
2004-12-01T23:59:59.000Z
This report presents an investigation on the modeling of stationary DC and microwave nitrogen discharges and their afterglows, operating at pressures around one Torr and ionization degrees between 10-7-10-4. The model is based on the self-consistent solutions to the electron Boltzmann equation coupled to the rate balance equations for the most important neutral and charged species, the wave electrodynamics characteristics and the gas thermal balance equation. The results are obtained as a function of the usual discharge operating parameters, namely gas pressure, discharge current or electron density, and tube radius. It is shown that the vibrationally excited molecules play a central role in the whole problem, ensuring a strong link between different kinetics and directly contributing to the mechanisms of dissociation and gas heating. Furthermore, vibrationally excited molecules in high vibration levels are in the origin of the peaks observed in the flowing afterglow for the concentrations of several species, such as N{sub 2}(A {sup 3}{sigma}{sub g}{sup +}), N2(B 3{pi}g), N{sub 2}{sup +}(B {sup 2}{sigma}{sub u}{sup +}) and electrons, which occur downstream from the discharge after a dark zone as a consequence of the V-V up-pumping mechanism.
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.
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.
2003-10-01T23:59:59.000Z
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 extractingmore »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.« less
Few-group delayed neutron model based on a consistent set of decay constants
Campbell, J.M.; Spriggs, G.D. [Los Alamos National Lab., NM (United States)
1998-09-01T23:59:59.000Z
During the past 50 yr, more than 200 individual sets of delayed neutron parameters have been measured for 20 different fissionable isotopes. As readily observed from these experimental results, the abundances and the decay constants for each group can vary significantly from isotope to isotope as well as varying as a function of the incident neutron energy. From a reactor dynamic standpoint, variations in the decay constants lead to additional complexity when trying to predict the dynamic behavior of reactor systems that contain two or more fissioning isotopes. For example, the six-group point-reactor model must be expanded to include six differential equations describing the precursors produced by each fissioning isotope. Hence, for a system containing five fissioning isotopes, 30 differential equations would be required to describe the total delayed neutron activity. The objective of this paper is to present a status report of the first phase of an international effort to develop a new set of delayed neutron parameters that are based on a-consistent set of decay constants that simplifies the delayed neutron model in reactor dynamic calculations.
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.
About consistence between pi N Delta spin-3/2 gauge couplings and electromagnetic gauge invariance
D. Badagnani; C. Barbero; A. Mariano
2015-03-05T23:59:59.000Z
We analyze the consistence between the recently proposed "spin 3/2 gauge" interaction for the Delta resonance with nucleons and pions, and the fundamental electromagnetic gauge invariance in any radiative amplitude. Chiral symmetric pion-derivative pi N Delta couplings can be substituted through a linear transformation to get Delta-derivative ones, which have the property of decoupling the 1/2 field components of the Delta propagator. Nevertheless, the electromagnetic gauge invariance introduced through minimal substitution in all derivatives, can only be fulfilled at a given order n without destroying the spin 3/2 one by dropping n+1 order terms within an effective field theory (EFT) framework with a defined power counting. In addition, we show that the Ward identity for the gamma Delta gamma vertex cannot be fulfilled with a trimmed 3/2 propagator, which should be necessary in order to keep the spin 3/2 gauge symmetry in the radiative case for the gamma Delta gamma amplitude. Finally, it is shown that radiative corrections of the spin 3/2 gauge strong vertexes at one loop, reintroduce the conventional interaction.
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.
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.
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.
SELF-CONSISTENT ION CYCLOTRON ANISOTROPY-BETA RELATION FOR SOLAR WIND PROTONS
Isenberg, Philip A. [Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 (United States); Maruca, Bennett A. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Kasper, Justin C., E-mail: phil.isenberg@unh.edu, E-mail: bmaruca@ssl.berkeley.edu, E-mail: jkasper@cfa.harvard.edu [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)
2013-08-20T23:59:59.000Z
We derive a set of self-consistent marginally stable states for a system of ion-cyclotron waves propagating parallel to the large-scale magnetic field through a homogeneous proton-electron plasma. The proton distributions and the wave dispersions are related through the condition that no further ion-cyclotron resonant particle scattering or wave growth/damping may take place. The thermal anisotropy of the protons in these states therefore defines the threshold value for triggering the proton-cyclotron anisotropy instability. A number of recent papers have noted that the anisotropy of solar wind protons at 1 AU does not seem to be limited by the proton-cyclotron anisotropy threshold, even at low plasma beta. However, this puzzle seems to be due solely to the estimation of this anisotropy threshold under the assumption that the protons have a bi-Maxwellian distribution. We note that bi-Maxwellian distributions are never marginally stable to the resonant cyclotron interaction, so these estimates do not represent physically valid thresholds. The threshold anisotropies obtained from our marginally stable states are much larger, as a function of proton parallel beta, than the bi-Maxwellian estimates, and we show that the measured data remains below these more rigorous thresholds. Thus, the results of this paper resolve the apparent contradiction presented by the solar wind anisotropy observations at 1 AU: the bi-Maxwellian anisotropies are not rigorous thresholds, and so do not limit the proton distributions in the solar wind.
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.
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.
Morphology diagrams for A2B copolymer melts: real-space self-consistent field theory
Kumar, Rajeev [ORNL; Sides, Scott [ORNL; Mays, Jimmy [ORNL; Li, Yige [ORNL; Sumpter, Bobby G [ORNL
2012-01-01T23:59:59.000Z
Morphology diagrams for A2B copolymer melts are constructed using real-space self-consistent field theory (SCFT). In particular, the effect of architectural asymmetry on the morphology diagram is studied. It is shown that asymmetry in the lengths of A arms in the A2B copolymer melts aids in the microphase separation. As a result, the disorder-order transition boundaries for the A2B copolymer melts are shown to shift downward in terms of N, and N being the Flory s chi parameter and the total number of the Kuhn segments,respectively, in comparison with the A2B copolymers containing symmetric A arms. Furthermore, perforated lamellar (PL) and a micelle-like (M) microphase segregated morphologies are found to compete with the classical morphologies namely, lamellar, cylinders, spheres and gyroid. The PL morphology is found to be stable for A2B copolymers containing asymmetric A arms and M is found to be metastable for the parameter range explored in this work.
New Embolization Microcoil Consisting of Firm and Flexible Segments: Preliminary Clinical Experience
Irie, Toshiyuki [Hitachi General Hospital, Department of Radiology (Japan)], E-mail: toshiyuki.irie@ibabyo.hitachi.co.jp
2006-12-15T23:59:59.000Z
Purpose. To describe the preliminary clinical experience with a new embolization microcoil. Methods. The microcoil was made of a platinum coil spring, and consisted of firm and flexible segments. The firm segment functioned as an anchor and the flexible segment was well compacted to occlude the arteries. No Dacron fiber was attached. Seventy-one new microcoils were placed via microcatheters in 28 visceral arteries of 17 patients. Two other types of microcoils with Dacron fibers were used together in 8 arteries. Results. Sixty-nine new microcoils were placed and compacted successfully. Two coils were misplaced; one was retrieved and the other was left in the migrated artery, which remained patent 5 months later. All 28 arteries were occluded, and the goals of intervention were achieved successfully in all 17 cases. Conclusion. The new microcoils anchored and compacted well in the arteries. The clinical feasibility of this coil design was confirmed. The additional use of other types of microcoils with Dacron fiber was necessary to obtain rapid occlusion in some cases.
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.
Self-consistent modeling of radio-frequency plasma generation in stellarators
Moiseenko, V. E., E-mail: moiseenk@ipp.kharkov.ua; Stadnik, Yu. S., E-mail: stadnikys@kipt.kharkov.ua [National Academy of Sciences of Ukraine, National Science Center Kharkov Institute of Physics and Technology (Ukraine); Lysoivan, A. I., E-mail: a.lyssoivan@fz-juelich.de [Royal Military Academy, EURATOM-Belgian State Association, Laboratory for Plasma Physics (Belgium); Korovin, V. B. [National Academy of Sciences of Ukraine, National Science Center Kharkov Institute of Physics and Technology (Ukraine)] [National Academy of Sciences of Ukraine, National Science Center Kharkov Institute of Physics and Technology (Ukraine)
2013-11-15T23:59:59.000Z
A self-consistent model of radio-frequency (RF) plasma generation in stellarators in the ion cyclotron frequency range is described. The model includes equations for the particle and energy balance and boundary conditions for Maxwell’s equations. The equation of charged particle balance takes into account the influx of particles due to ionization and their loss via diffusion and convection. The equation of electron energy balance takes into account the RF heating power source, as well as energy losses due to the excitation and electron-impact ionization of gas atoms, energy exchange via Coulomb collisions, and plasma heat conduction. The deposited RF power is calculated by solving the boundary problem for Maxwell’s equations. When describing the dissipation of the energy of the RF field, collisional absorption and Landau damping are taken into account. At each time step, Maxwell’s equations are solved for the current profiles of the plasma density and plasma temperature. The calculations are performed for a cylindrical plasma. The plasma is assumed to be axisymmetric and homogeneous along the plasma column. The system of balance equations is solved using the Crank-Nicholson scheme. Maxwell’s equations are solved in a one-dimensional approximation by using the Fourier transformation along the azimuthal and longitudinal coordinates. Results of simulations of RF plasma generation in the Uragan-2M stellarator by using a frame antenna operating at frequencies lower than the ion cyclotron frequency are presented. The calculations show that the slow wave generated by the antenna is efficiently absorbed at the periphery of the plasma column, due to which only a small fraction of the input power reaches the confinement region. As a result, the temperature on the axis of the plasma column remains low, whereas at the periphery it is substantially higher. This leads to strong absorption of the RF field at the periphery via the Landau mechanism.
A few-group delayed neutron model based on a consistent set of decay constants
Campbell, J.M.; Spriggs, G.D.
1998-01-22T23:59:59.000Z
As part of an international effort, the Los Alamos National Laboratory has been asked to (1) determine if there is a set of dominant precursors that are common to all fissionable isotopes and all incident neutron energies, (2) expand the existing experimentally-measured few-group models commonly used in the nuclear industry into their 8-group equivalent using a consistent set of decay constants corresponding to these dominant precursors, and (3) formulate new group spectra for the equivalent 8-group model. In response to this request, LANL has calculated the theoretical delayed neutron yield for 14 different isotopes using three different incident neutron spectra (i.e., thermal, fast, and 14.1 MeV) using the current fission-yield and emission probability data found in ENDF-VI. An example of these results is shown in a figure in which the theoretical delayed neutron yields for the 271 precursors produced during thermal fission of {sup 235}U are plotted against the half-lives of the precursors. By comparing the results of all 14 isotopes, a preliminary set of precursors has been identified that are dominant within the various half-life regimes of the delayed neutron precursors. Also plotted on a figure are the group yields of the 8-group equivalent model of Keepin`s 6-group model. And finally, an example of the delayed neutron spectra for group 7 in the 8-group equivalent model is shown. A final report summarizing all results is expected to be released for review by the international steering committee by the summer of 1998.
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.
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.
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 ...
Landstreet, J D; Fossati, L
2014-01-01T23:59:59.000Z
CONTEXT. The ESO archive of FORS1 spectropolarimetric observations may be used to create a homogeneous database of magnetic field measurements. However, no systematic comparison of FORS field measurements to those obtained with other instruments has been undertaken so far. AIMS. We exploit the FORS archive of circular spectropolarimetric data to examine in a general way how reliable and accurate field detections obtained with FORS are. METHODS. We examine the observations of Ap and Bp stars, on the grounds that almost all of the unambiguous detections of magnetic fields in the FORS1 archive are in these kinds of stars. We assess the overall quality of the FORS1 magnetic data by examining the consistency of field detections with what is known from previous measurements obtained with other instruments, and we look at patterns of internal consistency. RESULTS. FORS1 magnetic measurements are fully consistent with those made with other instruments, and the internal consistency of the data is excellent. However, i...
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.
Berryman, J. G.
2011-02-01T23:59:59.000Z
Methods for computing Hashin-Shtrikman bounds and related self-consistent estimates of elastic constants for polycrystals composed of crystals having orthorhombic symmetry have been known for about three decades. However, these methods are underutilized, perhaps because of some perceived difficulties with implementing the necessary computational procedures. Several simplifications of these techniques are introduced, thereby reducing the overall computational burden, as well as the complications inherent in mapping out the Hashin-Shtrikman bounding curves. The self-consistent estimates of the effective elastic constants are very robust, involving a quickly converging iteration procedure. Once these self-consistent values are known, they may then be used to speed up the computations of the Hashin-Shtrikman bounds themselves. It is shown furthermore that the resulting orthorhombic polycrystal code can be used as well to compute both bounds and self-consistent estimates for polycrystals of higher-symmetry tetragonal, hexagonal, and cubic (but not trigonal) materials. The self-consistent results found this way are shown to be the same as those obtained using the earlier methods, specifically those methods designed specially for each individual symmetry type. But the Hashin-Shtrikman bounds found using the orthorhombic code are either the same or (more typically) tighter than those found previously for these special cases (i.e., tetragonal, hexagonal, and cubic). The improvement in the Hashin-Shtrikman bounds is presumably due to the additional degrees of freedom introduced into the available search space.
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
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.
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.
Zachmann, Gabriel
. Consistent Normal Orientation for Polygonal Meshes Pavel Borodin Gabriel Zachmann Reinhard Klein Institute
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
Krishnan, Kannan M.
Self-consistent magnetic properties of magnetite tracers optimized for magnetic particle imaging measured by ac susceptometry, magnetorelaxometry and magnetic particle spectroscopy Frank Ludwig a , Hilke. Krishnan b,n a Institute of Electrical Measurement and Fundamental Electrical Engineering, TU Braunschweig
Kammen, Daniel M.
Allocating city space to multiple transportation modes: A new modeling approach consistent with the physics of transport Eric J. Gonzales, Nikolas Geroliminis, Michael J. Cassidy and Carlos F. Daganzo WORKING PAPER UCB-ITS-VWP-2008-1 March 2008 #12;Allocating city space to multiple transportation modes
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
Carter, Sue
Charge transfer in photovoltaics consisting of interpenetrating networks of conjugated polymer and interpenetrating polymer networks6 can substantially im- prove the photoconductivity, and thus quantum efficiency and layered titanium dioxide (TiO2) nanoparticles on charge transfer processes in conjugated polymer
A self-consistent nonlinear force-free solution for a solar active region magnetic M.S. Wheatland
RÃ©gnier, StÃ©phane
fields 1. Introduction Solar coronal magnetic fields provide the source of energy for solar flaresA self-consistent nonlinear force-free solution for a solar active region magnetic field M.S. Wheatland Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia m
Survivable storage systems (e.g., Petal [19], Myriad [7], SwiftRAID [21], PASIS [35], and Cheops [3 of the data and mismatched fragments produce garbage. Protocols exist for achieving such consistency, including recovery from user mistakes [32], recovery from system fail- ure [14], and survival of client
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.
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
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
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 with the Code WARP+POSINST J.-L. Vay , M. A. Furman, LBNL, CA, USA R. H. Cohen, A. Friedman, D. P. Grote, LLNL of electrons, especially across lattice elements, Work supported by the U.S. DOE under LLNL and LBNL contracts
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
Palazzo, Antonio
2015-01-01T23:59:59.000Z
The two long-baseline experiments ICARUS and OPERA have recently provided bounds on light ($\\sim$ eV) sterile neutrinos exploiting the negative results of the $\
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz is Taking OverEvaluating '
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.
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.
Nojiri, Shin'ichi
2007-01-01T23:59:59.000Z
We suggest two realistic f(R) and one F(G) modified gravities which are consistent with local tests and cosmological bounds. The typical property of such theories is the presence of the effective cosmological constant epochs in such a way that early-time inflation and late-time cosmic acceleration are naturally unified within single model. It is shown that classical instability does not appear here and Newton law is respected. Some discussion of possible anti-gravity regime appearence and related modification of the theory is done.
Phillips, Jordan J., E-mail: philljj@umich.edu; Zgid, Dominika [Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109 (United States)
2014-06-28T23:59:59.000Z
We report an implementation of self-consistent Green's function many-body theory within a second-order approximation (GF2) for application with molecular systems. This is done by iterative solution of the Dyson equation expressed in matrix form in an atomic orbital basis, where the Green's function and self-energy are built on the imaginary frequency and imaginary time domain, respectively, and fast Fourier transform is used to efficiently transform these quantities as needed. We apply this method to several archetypical examples of strong correlation, such as a H{sub 32} finite lattice that displays a highly multireference electronic ground state even at equilibrium lattice spacing. In all cases, GF2 gives a physically meaningful description of the metal to insulator transition in these systems, without resorting to spin-symmetry breaking. Our results show that self-consistent Green's function many-body theory offers a viable route to describing strong correlations while remaining within a computationally tractable single-particle formalism.
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.
Kyung-Joo Noh; Uwe R. Fischer
2014-12-09T23:59:59.000Z
We present a perturbative treatment of the subohmic spin-boson model which remedies a crucial flaw in previous treatments. The problem is traced back to the incorrect application of a Markov type approximation to specific terms in the temporal evolution of the reduced density matrix. The modified solution is consistent both with numerical simulations and the exact solution obtained when the bath-coupling spin-space direction is parallel to the qubit energy-basis spin. We therefore demonstrate that %in distinction to previous findings the subohmic spin-boson model is capable of %consistently describing arbitrarily small %(less than two) ratios of the $T_2$ and $T_1$ decoherence times, associated to the decay of the off-diagonal and diagonal reduced density-matrix elements, respectively. An analytical formula for $T_2/T_1$ at the absolute zero of temperature is provided in the limit of a subohmic bath with vanishing spectral power law exponent. Small ratios closely mimic the experimental results for solid state (flux) qubits, which are subject predominantly to low-frequency electromagnetic noise, and we suggest a reanalysis of the corresponding experimental data in terms of a $nonanalytic$ decay of off-diagonal coherence.
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.
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.
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.
Kozlowski, Tomasz [Purdue University (United States); Miller, R. Matthew [Purdue University (United States); Downar, Thomas J. [Purdue University (United States); Barber, Douglas A. [Information Systems Laboratories (United States); Joo, Han Gyu [Korea Atomic Energy Research Institute (Korea, Republic of)
2004-04-15T23:59:59.000Z
A generalized interface module was developed for coupling any thermal-hydraulic code to any spatial kinetic code. In the design used here the thermal-hydraulic and spatial kinetic codes function as independent processes and communicate using the Parallel Virtual Machine software. This approach helps maximize flexibility while minimizing modifications to the respective codes. Using this interface, the U.S. Nuclear Regulatory Commission (NRC) three-dimensional neutron kinetic code, Purdue Advanced Reactor Core Simulator (PARCS), has been coupled to the NRC system analysis codes RELAP5 and Modernized Transient Reactor Analysis Code (TRAC-M). Consistent comparison of code results for the Organization for Economic Cooperation and Development/Nuclear Energy Agency main steam line break benchmark problem using RELAP5/PARCS and TRAC-M/PARCS was made to assess code performance.
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 ...
Christopher Thompson
2008-02-19T23:59:59.000Z
We consider the voltage structure in the open-field circuit and outer magnetosphere of a magnetar. The standard polar-cap model for radio pulsars is modified significantly when the polar magnetic field exceeds 1.8x10^{14} G. Pairs are created by accelerated particles via resonant scattering of thermal X-rays, followed by the nearly instantaneous conversion of the scattered photon to a pair. A surface gap is then efficiently screened by e+- creation, which regulates the voltage in the inner part of the circuit to ~10^9 V. We also examine the electrostatic gap structure that can form when the magnetic field is somewhat weaker, and deduce a voltage 10-30 times larger over a range of surface temperatures. We examine carefully how the flow of charge back to the star above the gap depends on the magnitude of the current that is extracted from the surface of the star, on the curvature of the magnetic field lines, and on resonant drag. The rates of different channels of pair creation are determined self-consistently, including the non-resonant scattering of X-rays, and collisions between gamma rays and X-rays. We find that the electrostatic gap solution has too small a voltage to sustain the observed pulsed radio output of magnetars unless i) the magnetic axis is nearly aligned with the rotation axis and the light of sight; or ii) the gap is present on the closed as well as the open magnetic field lines. Several properties of the radio magnetars -- their rapid variability, broad pulses, and unusually hard radio spectra -- are consistent with a third possibility, that the current in the outer magnetosphere is strongly variable, and a very high rate of pair creation is sustained by a turbulent cascade.
Madsen, Adrian; Sayre, Eleanor C
2013-01-01T23:59:59.000Z
We review the literature on the gender gap on concept inventories in physics. Across studies, men consistently score higher on pre-tests of the Force Concept Inventory (FCI) and Force and Motion Conceptual Evaluation (FMCE) by about 10%, and in most cases score higher on post-tests as well, also by about 10%. The average difference in normalized gain is about 6%. This difference is much smaller than the average difference in normalized gain between traditional lecture and interactive engagement (25%), but is large enough that it could impact the results of studies comparing the effectiveness of different teaching methods. Based on our analysis of 24 published articles comparing the impact of 34 factors that could potentially influence the gender gap, no single factor is sufficient to explain the gap. Several high-profile studies that have claimed to account for or reduce the gender gap have failed to be replicated, suggesting that isolated claims of explanations of the gender gap should be interpreted with ca...
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.
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.
Silva Aguirre, V.; Chaplin, W. J.; Bedding, T. R.; Christensen-Dalsgaard, J.; Kjeldsen, H. [Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C (Denmark); Casagrande, L. [Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, ACT 2611 (Australia); Basu, S. [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Campante, T. L.; Monteiro, M. J. P. F. G. [Centro de Astrofisica and Faculdade de Ciencias, Universidade do Porto, Rua das Estrelas, 4150-762 Porto (Portugal); Huber, D. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Miglio, A.; Elsworth, Y.; Hekker, S. [School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT (United Kingdom); Serenelli, A. M.; Garcia, R. A.; Mathur, S. [Kavli Institute for Theoretical Physics, Santa Barbara, CA 93106 (United States); Ballot, J. [CNRS, Institut de Recherche en Astrophysique et Planetologie, 14 avenue Edouard Belin, F-31400 Toulouse (France); Creevey, O. L. [Laboratoire Lagrange, UMR 7293, Universite de Nice Sophia-Antipolis, CNRS, Observatoire de la Cote dAzur, F-06304 Nice Cedex 4 (France); Gilliland, R. L. [Center for Exoplanets and Habitable Worlds, The Pennsylvania State University, University Park, PA (United States); Metcalfe, T. S. [Space Science Institute, Boulder, CO 80301 (United States); and others
2012-09-20T23:59:59.000Z
Accurately determining the properties of stars is of prime importance for characterizing stellar populations in our Galaxy. The field of asteroseismology has been thought to be particularly successful in such an endeavor for stars in different evolutionary stages. However, to fully exploit its potential, robust methods for estimating stellar parameters are required and independent verification of the results is mandatory. With this purpose, we present a new technique to obtain stellar properties by coupling asteroseismic analysis with the InfraRed Flux Method. By using two global seismic observables and multi-band photometry, the technique allows us to obtain masses, radii, effective temperatures, bolometric fluxes, and hence distances for field stars in a self-consistent manner. We apply our method to 22 solar-like oscillators in the Kepler short-cadence sample, that have accurate Hipparcos parallaxes. Our distance determinations agree to better than 5%, while measurements of spectroscopic effective temperatures and interferometric radii also validate our results. We briefly discuss the potential of our technique for stellar population analysis and models of Galactic Chemical Evolution.
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.
Fulcher, L.P. (Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH (USA))
1990-10-01T23:59:59.000Z
The energies, fine-structure splittings, leptonic widths, and dipole electromagnetic transition rates are calculated for the {Upsilon} and charmonium systems using a potential model based on Richardson's interpolating form for the running coupling constant. Using the definitions of the spin-dependent potentials of Eichten and Feinberg and arguments based on lattice gauge calculations, we have determined the long-range spin-orbit potential from Gromes's consistency condition. It is also shown that the sign difference between the long-range spin-orbit potential and the perturbative spin-orbit potential is important in explaining the measured values of the fine-structure ratio in both the {Upsilon} and charmonium {ital P} states. The question of whether the parameter {Lambda} of Richardson's potential is supposed to play the role of the universal QCD scale is addressed. It is argued that the agreement of the {Upsilon} and charmonium leptonic widths with experiment is convincing support for Richardson's form for the running coupling constant since these numbers reflect directly the values of the various {ital S}-state wave functions at the origin. Certain problems with the magnitudes of the hyperfine splittings and dipole transition rates of charmonium are discussed.
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.
Daniel Schmidt; Cornelia Monzel; Timo Bihr; Rudolf Merkel; Udo Seifert; Kheya Sengupta; Ana-Sun?ana Smith
2014-03-28T23:59:59.000Z
The interaction of fluid membranes with a scaffold, which can be a planar surface or a more complex structure, is intrinsic to a number of systems - from artificial supported bilayers and vesicles to cellular membranes. In principle, these interactions can be either discrete and protein mediated, or continuous. In the latter case, they emerge from ubiquitous intrinsic surface interaction potentials as well as nature-designed steric contributions of the fluctuating membrane or from the polymers of the glycocalyx. Despite the fact that these nonspecific potentials are omnipresent, their description has been a major challenge from experimental and theoretical points of view. Here we show that a full understanding of the implications of the continuous interactions can be achieved only by expanding the standard superposition models commonly used to treat these types of systems, beyond the usual harmonic level of description. Supported by this expanded theoretical framework, we present three independent, yet mutually consistent, experimental approaches to measure the interaction potential strength and the membrane tension. Upon explicitly taking into account the nature of shot noise as well as of finite experimental resolution, excellent agreement with the augmented theory is obtained, which finally provides a coherent view of the behavior of the membrane in a vicinity of a scaffold.
Quark propagator in the Nambu-Jona-Lasinio model in a self-consistent 1/N{sub c} expansion
Mueller, D.; Buballa, M.; Wambach, J. [Institut fuer Kernphysik, Technische Universitaet Darmstadt (Germany)
2010-05-01T23:59:59.000Z
The quark propagator is calculated in the Nambu-Jona-Lasinio model in a self-consistent 1/N{sub c}-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. 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 the maximum-entropy method is able to reproduce the rough features of the spectral functions, but not the details.
A. Avdeenkov; S. Goriely; S. Kamerdzhiev; S. Krewald
2011-08-08T23:59:59.000Z
The E1 strength function for 15 stable and unstable Sn even-even isotopes from A=100 till A=176 are calculated using the self-consistent microscopic theory which, in addition to the standard (Q)RPA approach, takes into account the single-particle continuum and the phonon coupling. Our analysis shows two distinct regions for which the integral characteristics of both the giant and pygmy resonances behave rather differently. For neutron-rich nuclei, starting from $^{132}$Sn, we obtain a giant E1 resonance which significantly deviates from the widely-used systematics extrapolated from experimental data in the $\\beta$-stability valley. We show that the inclusion of the phonon coupling is necessary for a proper description of the low-energy pygmy resonances and the corresponding transition densities for $A132$ region the influence of phonon coupling is significantly smaller. The radiative neutron capture cross sections leading to the stable $^{124}$Sn and unstable $^{132}$Sn and $^{150}$Sn nuclei are calculated with both the (Q)RPA and the beyond-(Q)RPA strength functions and shown to be sensitive to both the predicted low-lying strength and the phonon coupling contribution. The comparison with the widely-used phenomenological Generalized Lorentzian approach shows considerable differences both for the strength function and the radiative neutron capture cross section. In particular, for the neutron-rich $^{150}$Sn, the reaction cross section is found to be increased by a factor greater than 20. We conclude that the present approach may provide a complete and coherent description of the $\\gamma$-ray strength function for astrophysics applications. In particular, such calculations are highly recommended for a reliable estimate of the electromagnetic properties of exotic nuclei.
On formation rate of close binaries consisting of a super-massive black hole and a white dwarf
P. B. Ivanov
2002-06-09T23:59:59.000Z
The formation rate of a close binary consisting of a super-massive black hole and a compact object (presumably a white dwarf) in galactic cusps is calculated with help of the so-called loss cone approximation. For a power low cusp of radius $r_{a}$, the black hole mass $M\\sim 10^{6}M_{\\odot}$, this rate $\\dot N_{wd}\\sim 4\\cdot 10^{-5}K(p}\\sqrt{{GM\\over r_{a}^{3}}}\\approx 3\\cdot 10^{-9}K(p){({M\\over 10^{6}M_{\\odot}})}^{1/2}{({r_{a}\\over 1pc})}^{-3/2}yr^{-1}$. The function $K(p)$ depends on parameter $p$ determining the cusp profile, and for the standard cusp profiles with $p=1/4$ $K(p)\\sim 2$. We estimate the probability ${\\it Pr}$ of finding of a compact object orbiting around a black hole with period $P$ in one particular galaxy to be ${\\it Pr}\\sim 10^{-7}{({P/10^{3}s\\over M/10^{6}M_{\\odot}})}^{8/3} {({M/10^{6}M_{\\odot}\\over r_{a}/ 1pc})}^{3/2}$. The object with the period $P\\sim 10^{3} s$ emits gravitational waves with amplitude sufficient to be detected by LISA type gravitational wave anatenna from the distance $\\sim 10^{3}Mpc$. Based on estimates of masses of super-massive black holes in nearby galaxies, we speculate that LISA would detect several such events during its mission.
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
Grün, G., E-mail: gruen@am.uni-erlangen.de; Klingbeil, F.
2014-01-15T23:59:59.000Z
In this paper, we present a numerical scheme for the diffuse-interface model in [3] for two-phase flow of immiscible, incompressible fluids. As that model is in particular consistent with thermodynamics, energy estimates are expected to carry over to the discrete setting. By a subtle discretization of the convective coupling with the flux of the phase-field in the momentum equation, we prove discrete consistency with thermodynamics. Numerical experiments in two spatial dimensions – ranging from Rayleigh–Taylor instability to a comparison with previous modeling approaches – indicate the full practicality of our scheme and enable a first validation of the new modeling approach in [3].
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
Solar-blind deep-UV band-pass filter (250 -350 nm) consisting of a metal nano-grid fabricated
Solar-blind deep-UV band-pass filter (250 - 350 nm) consisting of a metal nano-grid fabricated, fabricated and demonstrated a solar-blind deep-UV pass filter, that has a measured optical performance, the filter offers simple yet effective and low cost solar-blind deep-UV detection at either a single device
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
Choobineh, Fred
A - 1 Non-Mandatory Appendix A to §1910.900: Ergonomics Program Elements Note: The elements of an ergonomics program contained here are consistent with and somewhat redundant of those contained that is not in the mandatory part of the standard is not mandatory. Elements of a complete ergonomics program. A full
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
Standiford, Richard B.
resources requires access to current and consistent geospatial information that can be shared by resource managers and the public. Geospatial information describing our land and natural resources comes from many sources and is most effective when stored in a geospatial database and used in a geographic information
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
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
Jones, Geraint
4 Processes Each process may be a primitive process indicating a single action; or it may be a composite process consisting of a number of de#12;nitions and simpler component processes bound together by process constructors, indicating a combination of the actions of its component processes. The structure
Consistency of robust portfolio estimators
2006-10-19T23:59:59.000Z
Oct 6, 2006 ... The effect was made visible by examining stability of portfolio .... where W(Z, q) denotes the Wishart distribution with scale matrix Z ? Rn×n.
Energetically-consistent collisional gyrokinetics
Burby, J W; Qin, H
2015-01-01T23:59:59.000Z
We present a formulation of collisional gyrokinetic theory with exact conservation laws for energy and canonical toroidal momentum. Collisions are accounted for by a nonlinear gyrokinetic Landau operator. Gyroaveraging and linearization do not destroy the operator's conservation properties. Just as in ordinary kinetic theory, the conservation laws for collisional gyrokinetic theory are selected by the limiting collisionless gyrokinetic theory.
Consistent Estimation for Aggregated GARCH
Komunjer, Ivana
2001-01-01T23:59:59.000Z
of the QMLEs of the ”weak” GARCH with TDGP parameters (¯ 0 ;of the QMLEs of the ”weak” GARCH with TDGP parameters (¯ 0 ;of the QMLEs of the ”weak” GARCH with TDGP parameters (¯ 0 ;
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...
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.
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.
American Society for Testing and Materials. Philadelphia
2002-01-01T23:59:59.000Z
1.1 These product consistency test methods A and B evaluate the chemical durability of homogeneous glasses, phase separated glasses, devitrified glasses, glass ceramics, and/or multiphase glass ceramic waste forms hereafter collectively referred to as “glass waste forms” by measuring the concentrations of the chemical species released to a test solution. 1.1.1 Test Method A is a seven-day chemical durability test performed at 90 ± 2°C in a leachant of ASTM-Type I water. The test method is static and conducted in stainless steel vessels. Test Method A can specifically be used to evaluate whether the chemical durability and elemental release characteristics of nuclear, hazardous, and mixed glass waste forms have been consistently controlled during production. This test method is applicable to radioactive and simulated glass waste forms as defined above. 1.1.2 Test Method B is a durability test that allows testing at various test durations, test temperatures, mesh size, mass of sample, leachant volume, a...
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...
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.
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...
Kim, Ji-hoon; Wise, John H.; /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Princeton U., Astrophys. Sci. Dept.; Alvarez, Marcelo A.; /Canadian Inst. Theor. Astrophys.; Abel, Tom; /KIPAC, Menlo Park /Stanford U., Phys. Dept.
2011-11-04T23:59:59.000Z
There is mounting evidence for the coevolution of galaxies and their embedded massive black holes (MBHs) in a hierarchical structure formation paradigm. To tackle the nonlinear processes of galaxy-MBH interaction, we describe a self-consistent numerical framework which incorporates both galaxies and MBHs. The high-resolution adaptive mesh refinement (AMR) code Enzo is modified to model the formation and feedback of molecular clouds at their characteristic scale of 15.2 pc and the accretion of gas onto an MBH. Two major channels of MBH feedback, radiative feedback (X-ray photons followed through full three-dimensional adaptive ray tracing) and mechanical feedback (bipolar jets resolved in high-resolution AMR), are employed. We investigate the coevolution of a 9.2 x 10{sup 11} M {circle_dot} galactic halo and its 10{sup 5} {circle_dot} M embedded MBH at redshift 3 in a cosmological CDM simulation. The MBH feedback heats the surrounding interstellar medium (ISM) up to 10{sup 6} K through photoionization and Compton heating and locally suppresses star formation in the galactic inner core. The feedback considerably changes the stellar distribution there. This new channel of feedback from a slowly growing MBH is particularly interesting because it is only locally dominant and does not require the heating of gas globally on the disk. The MBH also self-regulates its growth by keeping the surrounding ISM hot for an extended period of time.
Debayle, A. [CEA, DAM, DIF, F-91297 Arpajon (France) [CEA, DAM, DIF, F-91297 Arpajon (France); ETSI Aeronáuticos. Universidad Politécnica de Madrid, Madrid 28040 (Spain); Sanz, J. [ETSI Aeronáuticos. Universidad Politécnica de Madrid, Madrid 28040 (Spain)] [ETSI Aeronáuticos. Universidad Politécnica de Madrid, Madrid 28040 (Spain); Gremillet, L. [CEA, DAM, DIF, F-91297 Arpajon (France)] [CEA, DAM, DIF, F-91297 Arpajon (France); Mima, K. [School for the Creation of Photonic Industries, Shizuoka 431-1202 (Japan)] [School for the Creation of Photonic Industries, Shizuoka 431-1202 (Japan)
2013-05-15T23:59:59.000Z
Following a recent work by Sanz et al. [Phys. Rev. E 85, 046411 (2012)], we elaborate upon a one-dimensional model describing the interaction between an ultra-intense, normally incident laser pulse and an overdense plasma. The analytical solutions of the reflected laser field, the electrostatic field, and the plasma surface oscillation are obtained within the cold-fluid approximation. The high-order harmonic spectrum is calculated from the exact solution of the plasma surface oscillations. In agreement with particle-in-cell simulations, two regimes of harmonic generation are predicted: for moderately relativistic laser intensities, or high plasma densities, the harmonic spectrum is determined by the discontinuity in the derivative of the reflected field when the electron plasma boundary oscillates across the fixed ion boundary. For higher intensities, the electron plasma boundary is confined inside the ion region and oscillates at relativistic velocities, giving rise to a train of reflected attosecond pulses. In both cases, the harmonic spectrum obeys an asymptotic ?{sup ?4} scaling. The acceleration of electrons and the related laser absorption efficiency are computed by a test particle method. The model self-consistently reproduces the transition between the “anomalous skin effect” and the “J × B” heating predicted by particle-in-cell simulations. Analytical estimates of the different scalings are presented.
Georgescu, Ionu?, E-mail: ionutg@gmail.com; Mandelshtam, Vladimir A. [Chemistry Department, University of California, Irvine, California 92697 (United States)] [Chemistry Department, University of California, Irvine, California 92697 (United States); Jitomirskaya, Svetlana [Department of Mathematics, University of California, Irvine, California 92697 (United States)] [Department of Mathematics, University of California, Irvine, California 92697 (United States)
2013-11-28T23:59:59.000Z
Given a quantum many-body system, the Self-Consistent Phonons (SCP) method provides an optimal harmonic approximation by minimizing the free energy. In particular, the SCP estimate for the vibrational ground state (zero temperature) appears to be surprisingly accurate. We explore the possibility of going beyond the SCP approximation by considering the system Hamiltonian evaluated in the harmonic eigenbasis of the SCP Hamiltonian. It appears that the SCP ground state is already uncoupled to all singly- and doubly-excited basis functions. So, in order to improve the SCP result at least triply-excited states must be included, which then reduces the error in the ground state estimate substantially. For a multidimensional system two numerical challenges arise, namely, evaluation of the potential energy matrix elements in the harmonic basis, and handling and diagonalizing the resulting Hamiltonian matrix, whose size grows rapidly with the dimensionality of the system. Using the example of water hexamer we demonstrate that such calculation is feasible, i.e., constructing and diagonalizing the Hamiltonian matrix in a triply-excited SCP basis, without any additional assumptions or approximations. Our results indicate particularly that the ground state energy differences between different isomers (e.g., cage and prism) of water hexamer are already quite accurate within the SCP approximation.
Chait, Brian T.
demonstrate that Nucleoplasmin (Npm), an exceedingly abundant maternally- deposited protein, is a potent substrate for PRMT5/MEP50 and is mono- and symmetri- cally dimethylated at Arg187. Furthermore, Npm modulates PRMT5/MEP50 activity di- rected towards histones, consistent with a regulatory role for Npm
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.
Jasperse, John R.; Basu, Bamandas [Air Force Research Laboratory, Space Vehicles Directorate, Hanscom AFB, Massachusetts 01731 (United States); Lund, Eric J. [Space Science Center, University of New Hampshire, Durham, New Hampshire 03824 (United States); Grossbard, Neil [Institute for Scientific Research, Boston College, Chestnut Hill, Massachusetts 02467 (United States)
2010-06-15T23:59:59.000Z
The physical processes that determine the self-consistent electric field (E{sub ||}) parallel to the magnetic field have been an unresolved problem in magnetospheric physics for over 40 years. Recently, a new multimoment fluid theory was developed for inhomogeneous, nonuniformly magnetized plasma in the guiding-center and gyrotropic approximation that includes the effect of electrostatic, turbulent, wave-particle interactions (see Jasperse et al. [Phys. Plasmas 13, 072903 (2006); ibid.13, 112902 (2006)]). In the present paper and its companion paper [Jasperse et al., Phys. Plasmas 17, 062903 (2010)], which are intended as sequels to the earlier work, a fundamental model for downward, magnetic field-aligned (Birkeland) currents for quasisteady conditions is presented. The model includes the production of electrostatic ion-cyclotron turbulence in the long-range potential region by an electron, bump-on-tail-driven ion-cyclotron instability. Anomalous momentum transfer (anomalous resistivity) by itself is found to produce a very small contribution to E{sub ||}; however, the presence of electrostatic, ion-cyclotron turbulence has a very large effect on the altitude dependence of the entire quasisteady solution. Anomalous energy transfer (anomalous heating and cooling) modifies the density, drift, and temperature altitude profiles and hence the generalized parallel-pressure gradients and mirror forces in the electron and ion momentum-balance equations. As a result, |E{sub ||}| is enhanced by nearly a factor of 40 compared to its value when turbulence is absent. The space-averaged potential increase associated with the strong double layer at the bottom of the downward-current sheet is estimated using the FAST satellite data and the multimoment fluid theory.
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.
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
All Economics minor requirements must be taken for a letter grade with a minimum grade of C-. The Economics major consists of (1) the Core, (2) History/Theory/Thought, and (3) Economics Electives. Minimum Minor Hours: 18 1. ECONOMICS CORE: All Economics minors must complete these courses. HISTORY
The histories interpretation: stability instead of consistency?
C. J. S. Clarke
2000-08-14T23:59:59.000Z
Using a reformulation of conventional results in decoherence theory, a condition is proposed for singling out a distinguished class of histories which includes those which use the ``pointer basis'' of Zurek.
Consistency of 8B neutrino spectra
Oliver S. Kirsebom; Hans O. U. Fynbo; Riccardo Raabe; Karsten Riisager; Thomas Roger
2014-08-05T23:59:59.000Z
We identify and quantify systematic effects not accounted for in two previous measurements of the alpha-alpha relative-energy distribution in the beta decay of 8B, which can explain the apparent disagreement with respect to two newer measurements. This settles a current dispute concerning the shape of the 8B neutrino spectrum of importance to solar-neutrino studies.
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...
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
ADAPTIVE REGULARIZED SELF-CONSISTENT FIELD ITERATION ...
2012-10-08T23:59:59.000Z
†Department of Mathematics, MOE-LSC and Institute of Natural Sciences, Shanghai Jiaotong University, China. (zw2109@sjtu.edu.cn). Research ...... [9] P. Hohenberg and W. Kohn, Inhomogeneous electron gas, Phys. Rev., 136 (1964), pp.
The Consortium The CORAS consortium consists
StÃ¸len, Ketil
), - Solinet (Germany) and - Telenor (Norway); seven research institutes: - CLRC/RAL (UK), - CTI (Greece), - FORTH (Greece), - IFE (Norway), - NST (Norway), - NR (Norway) and - SINTEF (Norway); as well as one
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\
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 ...
Identification Decisions: Who is the Most Consistent?
Alley, Gordon R.; Deshler, Donald D.; Mellard, Daryl F.
1980-01-01T23:59:59.000Z
of adequate length 36.50 16.85 37.50 21.86 34.35 24.22 37.16 23.12 23.46 10.28 24 .77 15.05 31.62 14 .34 28 80 14.02" Disability in using study skJIIs (l0) 87.45 14.85 69.9 1 28.14 78 .36 22.42 69. 12 21.77 5869 23.55 7207 23 47 69.44 20 87 77.28 11 .04a...
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
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.
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.
Hermeneutics, Poetry, and the Irony of Plato
Foster, Travis
Hermeneutics, Poetry, and the Irony of Plato Travis Foster Baylor University Introduction In Book X of Pla to ' s Republic, Socrates considers whether or not to exile poetry from the ideal polis. He settles on a provisional answer... ' s hermeneutical insights un veil Platonic epis temology and metaphysics, a l lowing us to see Plato not as a writer in conflict with himself, but as a poet ironi cally crafting his own work of genius. The discussion to follow consists of four sections...
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)
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.
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)
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.
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
of nutrients, suggesting similarities in biologi- cally driven cycling (Bruland 1980, 1983). In some instances
Checking e-service consistency using Description Logics Luigi Dragone
Rosati, Riccardo
specification and a suitable operational semantics of the e-service contract, on which we define functional representation. On the other hand, there is a strong requirement on the well- foundedness of the service contract
Construction of operator product expansion coefficients via consistency conditions
Jan Holland
2009-06-30T23:59:59.000Z
In this thesis an iterative scheme for the construction of operator product expansion (OPE) coefficients is applied to determine low order coefficients in perturbation theory for a specific toy model. We use the approach to quantum field theory proposed by S. Hollands [arXiv:0802.2198], which is centered around the OPE and a number of axioms on the corresponding OPE coefficients. This framework is reviewed in the first part of the thesis. In the second part we apply an algorithm for the perturbative construction of OPE coefficients to a toy model: Euclidean $\\varphi^6$-theory in 3-dimensions. Using a recently found formulation in terms of vertex operators and a diagrammatic notation in terms of trees [arXiv:0906.5313v1], coefficients up to second order are constructed, some general features of coefficients at arbitrary order are presented and an exemplary comparison to the corresponding customary method of computation is given.
Consistency of the Siilver Dichotomy in Generalised Baire Space
? The answer is negative in GÂ¨odel's L, in a strong sense. 2 #12;Theorem 3 (SDF-Hyttinen-Kulikov [2, 3]) Assume
On the internal consistency of holographic dark energy models
Horvat, R, E-mail: horvat@lei3.irb.hr [Rudjer Boskovic Institute, POB 180, 10002 Zagreb (Croatia)] [Rudjer Boskovic Institute, POB 180, 10002 Zagreb (Croatia)
2008-10-15T23:59:59.000Z
Holographic dark energy (HDE) models, underpinned by an effective quantum field theory (QFT) with a manifest UV/IR connection, have become convincing candidates for providing an explanation of the dark energy in the universe. On the other hand, the maximum number of quantum states that a conventional QFT for a box of size L is capable of describing relates to those boxes which are on the brink of experiencing a sudden collapse to a black hole. Another restriction on the underlying QFT is that the UV cut-off, which cannot be chosen independently of the IR cut-off and therefore becomes a function of time in a cosmological setting, should stay the largest energy scale even in the standard cosmological epochs preceding a dark energy dominated one. We show that, irrespective of whether one deals with the saturated form of HDE or takes a certain degree of non-saturation in the past, the above restrictions cannot be met in a radiation dominated universe, an epoch in the history of the universe which is expected to be perfectly describable within conventional QFT.
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
Optimal Soft Arc Consistency M.C. Cooper
Winckler, Marco Antonio Alba
The Valued CSP (VCSP) framework is a generic optimization framework with a wide range of applications. Soft, an essential ingredient of a branch and bound search. But soft AC is much more complex than traditional AC . In this paper, we focus on Weighted CSP (WCSP) where costs are numbers, combined by addition. This VCSP sub
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
Time (in)consistency of multistage distributionally robust inventory ...
2014-10-31T23:59:59.000Z
Recently, there has been a growing interest in developing inventory control ... We study these phenomena in the context of managing an inventory over time, ...
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
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
Learning Temporally Consistent Rigidities Jean-Sebastien Franco Edmond Boyer
Boyer, Edmond
in the industry such as 3D television, entertainment based on 3D and full-body interaction. This is creating, overconstrained meth- ods that hardly handle the variability of real surface data. To lift this limitation
DID YOU KNOW? It is important to consistently
Burke, Peter
food and after using the bathroom, changing diapers and handling pets. For best results, use warm water for consumption. Surface Cleaning TipsÂ· before handling food; Â· after handling food; Â· after using the bathroom; and Â· after handling pets. Wash! Always wash hands with warm water and soap: THE BIG 3: To Fight BAC!Â® always
Short Communications 291 pairwise comparisons revealed no consistent down-
Loughry, Jim
time allocation in a stochastic environment. EcolQgy, 61, 119-128. Caraco, T. 1981a. Energy budgets and pollinator-plant interactions: the foraging behavior of bees and wasps on artificial flowers. Ecology, 62, 20 home range' (Brody & Melcher 1985)has recently received much atten- tion (Sherman 1981; Balfour 1983
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
Consistent Rule-based Modeling: Validation of Applicability Criteria for
Wichmann, Felix
Technische UniversitÃ¤t Berlin School of Electrical Engineering and Computer Science Department of Software in theoretical as in formal problems. I also want to thank Olga Runge for her support concerning the AGG
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.
Consistency of external dosimetry in epidemiologic studies of nuclear workers
Fix, J.J.; Gilbert, E.S.
1991-10-01T23:59:59.000Z
To make the best use of available epidemiologic data in assessing risks from exposure to low-level radiation, it is important that biases and uncertainties in estimated doses be understood and documented. With this understanding, analyses of mortality data can be strengthened by including the use of correction factors where judged appropriate, excluding portions of the data where uncertainty in dose estimates is judged to be very large, and conducting sensitivity analyses to examine the effect of alternative assumptions about dosimetry errors and biases on results. It is hoped that the pooling of data from several epidemiologic studies and improved understanding of dosimetry will lead to better estimates of radiation risks. 10 refs., 4 tabs.
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 ...
A Generic Arc-Consistency Algorithm and its Specializations1
Deville, Yves
not take into account the semantics of constraints. In this paper, we present a new generic arc satisfaction problems (CSP). A CSP is de ned by a nite set of variables taking values from nite domains of applications include graph-coloring, warehouse locations, car-sequencing and cutting stock (see for instance 4
A Generic ArcConsistency Algorithm and its Specializations 1
Deville, Yves
, these algorithms do not take into account the semantics of constraints. In this paper, we present a new generic arc as constraint satisfaction problems (CSP). A CSP is defined by a finite set of variables taking values from. Examples of applications include graphÂcoloring, warehouse locations, carÂsequencing and cutting stock (see
Nonlinearly consistent schemes for coupled problems in reactor analysis
Mahadevan, Vijay Subramaniam
2007-04-25T23:59:59.000Z
physical systems, the nonlinear vector function N(y) may be factorized as G(y)y, where G(y) is a matrix whose elements depend on y. Using this factorization, Equation (1.2) can be re-cast as ' ( )y b (1.3) Most coupled phenomena..., the very popular theta discretization method can be used. When this scheme is applied to Equation (1.3), we obtain the following equation. 1 1 1 1 1 1 ( ) ] (1 ( ) ] n n n n n n n n n n n n y y L y N y b L y N y b t t + + + + + + - = theta [ + + + -theta...
xlinkit: A Consistency Checking and Smart Link Generation Service
Finkelstein, Anthony
, Wolfgang Emmerich and Anthony Finkelstein Department of Computer Science University College London Gower Street, London, WC1E 6BT UK {c.nentwich,l.capra,w.emmerich,a.finkelstein}@cs.ucl.ac.uk xlinkit@acm.org. #12;2 Â· C. Nentwich, L. Capra, W. Emmerich and A. Finkelstein reference to a simple example
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.
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.
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
Consistent cycles in graphs and digraphs Stefko Miklavic
PotoÃ¨nik, PrimoÂ?
of this result can be found in Biggs' paper [1]. A sketch of the proof given there is based on a beautiful idea. (see Theorem 4.1.) Many results in this paper follow Biggs [1], but for the sake of self- containedness
Process variables controlling consistency of carbon nanotube forest growth
Vincent, Hanna Megumi
2014-01-01T23:59:59.000Z
Aligned arrays of carbon nanotubes (A-CNTs), called CNT forests, are the precursor for controlled-morphology macroscopic nanocomposites and nanoengineered composites due to theirscale-dependent, tunable physicall properties. ...
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.
Time Dependent Hadronization via HERMES and EMC Data Consistency
K. Gallmeister; U. Mosel
2008-02-05T23:59:59.000Z
Using QCD-inspired time dependent cross sections for pre-hadrons we provide a combined analysis of available experimental data on hadron attenuation in DIS off nuclei as measured by HERMES with 12 and 27 GeV and by EMC with 100 and 280 GeV lepton beam energies. We extract the complete four-dimensional evolution of the pre-hadrons using the JETSET-part of PYTHIA. We find a remarkable sensitivity of nuclear attenuation data to the details of the time-evolution of cross sections. Only cross sections evolving linearly in time describe the available data in a wide kinematical regime. Predictions for experimental conditions at JLAB (5 and 12 GeV beam energies) are included.
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—
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
GWI plan ensures focused, consistent approach to improvements | Y-12
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHall ATours,Dioxide andNational Security
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.
Self-Consistent Criteria for Evaluation of Neutron Interaction
Henry H.F,Newlon C.E.,Knight J.R.
2007-08-02T23:59:59.000Z
New safe interaction criteria for containers of fissionable materials handled at the Oak Ridge Gaseous Diffusion Plant have been developed on the basis of an interaction theory using the basic concepts of a safe solid angle subtended by interacting containers, and the multiplication factor as determined by two-group theory for an individually safe containers The calculated results agree satisfactorily with experimental data obtained with identical interacting units involving both cylinders and slabs containing highly enriched uranium, the core compositions of which were varied between H/U-235 atomic ratios of 44.3 and 337. The application of the derived interaction criteria to items containing material with low moderation or low U-235 assay, and to containers for which nuclear safety is dependent upon control of the U-235 mass or U-235 concentration is discussed.
Spectrally Consistent Satellite Image Fusion with Improved Image Priors
and T. BÃ¸vith Informatics and Mathematical Modeling Technical University of Denmark DK-2800 Kgs. Lyngby, Denmark {haa,aa,thb}@imm.dtu.dk J. R. Sveinsson and J. A. Benediktsson Department of Electrical between high and low resolution is 4 by 4 to 1 i.e. 1:16. This is however done without loss of generality
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomassSustainableCSL Gas Recovery Biomass16 2013Management Program JumpWebpage |
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here.Telluric Survey asWest,CEI Jump to:Cerion Energy Inc JumpCerroProgram
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here.Telluric Survey asWest,CEI Jump to:Cerion Energy Inc
A Probabilistic Approach to Site-Specific, Hazard-Consistent
Office of Environmental Management (EM)
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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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy: GridTruck PlatooningJefferson7593Energy Storage EnergySingle-Wall
An event consists of a set of charge, tim
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative FuelsSanta FeAuthorization| Iron is|Bayesianevent
The EIS process consists of several steps, each 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructureProposedPAGESafetyTed5,Audit ReportThe EECBG Program: A NewEIS
McClelland, James L. "Jay"
learning systems theory as previously presented. However, new simulations extending those reported in Mc with neocortical learning mechanisms. An additional simulation generalizes beyond the network model previously used and neocortex in learning and memory (McClelland, McNaughton & O'Reilly, 1995). However, new simulations
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...
A fundamental goal of Earth science is to understand the remarkable instability of late
Fold Fortunately, Santa Barbara Basin is tectoni- cally active.The basin is situated in the mid- dle
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
The Condor 88:493-498 0 The CooperOrnithologicalSociety1986
Moore, Frank R.
, and reinforcesspeculationthat solar-relatedin- formation is involved in the orientation of ongoingmigratory flight the sensorybasis of daytime orientation of typi- callynight-migratingpasserines.First,donight- migrating birds directionality amongcaptive EuropeanRobins (Erithacusrubeculu)testedin the morning, but only if the birds
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
Balasundaram, Balabhaskar "Baski"
can recognize whether it is well fed, average, or skinny. Largemouth Bass This much desired sport fish bass feed on insects but switch to fish at between two and three inches. They are visual predators food of largemouth bass andaverygoodcatch. Reproduction starts when they reach about 3 inches. Typi
Interactive planar multi-blade flows with a global angle of S.P. Kirbya,
Purvis, Richard
. There are many other applications, for example the flow around wind turbines, in domestic fans, food mixers successive blades and wakes is studied for locally non-symmetric blades aligned with a global angle of attack to the oncoming freestream. The typi- cal blade lies relatively near the centreline of the oncoming wake from
; 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
Hernes, Peter J.
. Services are not for personal use and do not include class materials. All work remains property Postcards Photo editing Programs Project management Posters Web graphics Web design Web updating typi as a whole, departments, programs, and faculty for administrative and academic purposes and department
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
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.
assessing treatment response: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
to criti- cally ill patients Sleeman, Derek 17 Assessing the Control Systems Capacity for Demand Response in Energy Storage, Conversion and Utilization Websites Summary: LBNL-5319E...
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...
A Consistency-Based Approach for Belief Change James P. Delgrande
Delgrande, James P.
, Simon Fraser University Burnaby, B.C., Canada V5A 1S6 jim@cs.sfu.ca Torsten Schaub Institut f properties while being well-suited for implementation. For belief revision, informally, in revising correlated: in choice revision, one such "extension" represents the revised state; alternately (skeptical
Szücs, Attila; Selverston, Allen I
2006-01-01T23:59:59.000Z
deviations of the overlapping SDF sections were calculated.well-separated peaks in the SDF. Superimposing and averaging+ a 1 and wher e t 2 a 1 = SDF ( t ) dt a 2 = ? SDF ( t ) dt
A consistent picture for large penguins in D -> pi+ pi-, K+ K-
Joachim Brod; Yuval Grossman; Alexander L. Kagan; Jure Zupan
2012-03-29T23:59:59.000Z
A long-standing puzzle in charm physics is the large difference between the D0 -> K+ K- and D0 -> pi+ pi- decay rates. Recently, the LHCb and CDF collaborations reported a surprisingly large difference between the direct CP asymmetries, Delta A_CP, in these two modes. We show that the two puzzles are naturally related in the Standard Model via s- and d-quark "penguin contractions". Their sum gives rise to Delta A_CP, while their difference contributes to the two branching ratios with opposite sign. Assuming nominal SU(3) breaking, a U-spin fit to the D0 -> K+ pi-, pi+ K-, pi+ pi-, K+ K- decay rates yields large penguin contractions that naturally explain Delta A_CP. Expectations for the individual CP asymmetries are also discussed.
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 ...
Paris-Sud XI, Université de
of sludge G. Agoda-Tandjawa, E. Dieudé-Fauvel*, R. Girault. and J.-C. Baudez Irstea, UR TSCF, Domaine des/solid matter interactions in sewage sludge has been developed, based on both rheological characteristics parameters (G' and G'') of both raw and flocculated sewage sludge at optimal dose of polymer increase
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...
Daniel, W.E.; Best, D.R.
1995-12-01T23:59:59.000Z
Vitrification has been identified as one potential option for the e materials such as Americium (Am), Curium (Cm), Neptunium (Np), and Plutonium (Pu). A process is being developed at the Savannah River Site to safely vitrify all of the highly radioactive Am/Cm material and a portion of the fissile (Pu) actinide materials stored on site. Vitrification of the Am/Cm will allow the material to be transported and easily stored at the Oak Ridge National Laboratory. The Am/Cm glass has been specifically designed to be (1) highly durable in aqueous environments and (2) selectively attacked by nitric acid to allow recovery of the valuable Am and Cm isotopes. A similar glass composition will allow for safe storage of surplus plutonium. This paper will address the composition, relative durability, and dissolution rate characteristics of the actinide glass, Loeffler Target, that will be used in the Americium/Curium Vitrification Project at Westinghouse Savannah River Company near Aiken, South Carolina. The first part discusses the tests performed on the Loeffler Target Glass concerning instantaneous dissolution rates. The second part presents information concerning pseudo-activation energy for the one week glass dissolution process.
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
Consistency of Ambipolar Diffusion Models with Infall in the L1544 Protostellar Core
Glenn E. Ciolek; Shantanu Basu
1999-09-25T23:59:59.000Z
Recent high-resolution studies of the L1544 protostellar core by Tafalla et al. and Williams et al. reveal the structure and kinematics of the gas. The observations of this prestellar core provide a natural test for theoretical models of core formation and evolution. Based on their results, the above authors claim a discrepancy with the implied infall motions from ambipolar diffusion models. In this paper, we reexamine the earlier ambipolar diffusion models, and conclude that the L1544 core can be understood to be a magnetically supercritical core undergoing magnetically diluted collapse. We also present a new model specifically designed to simulate the formation and evolution of the L1544 core. This model, which uses reasonable input parameters, yields mass and radial density distributions, as well as neutral and ion infall speed profiles, that are in very good agreement with physical values deduced by observations. The lifetime of the core is also in good agreement with prestellar core lifetimes estimated from statistics of an ensemble of cores. The observational input can act to constrain other currently unobserved quantities such as the degree of ionization, and the background magnetic field strength and orientation near the L1544 core.
Assessment of genetic markers for the improvement of beef quality and consistency
Gill, Jennifer
2010-01-01T23:59:59.000Z
The overall aim of this thesis was to investigate the genetic control of beef quality in a commercial population of Aberdeen Angus-sired cattle with a view to trait improvement. The population studied included 500 ...
Grant, Catherine E.
(i.e. non-flaring) particle background should continue to drop as we approach solar maximum · ACIS hardware and software continue to perform nominally · No known limitations on ACIS lifetime Energy Scale degraded · Slow decay in energy scale with time - Directly related to increasing CTI - Structure in FI CCD
Three-Dimensional Porous Metal?Metalloporphyrin Framework Consisting of Nanoscopic Polyhedral Cages
Wang, Xi-Sen; Meng, Le; Cheng, Qigan; Kim, Chungsik; Wojtas, Lukasz; Chrzanowski, Matthew; Chen, Yu-Sheng; Zhang, X. Peter; Ma, Shengqian (USF); (UC)
2012-02-07T23:59:59.000Z
An unprecedented nanoscopic polyhedral cage-containing metal-metalloporphyrin framework, MMPF-1, has been constructed from a custom-designed porphyrin ligand, 5,15-bis(3,5-dicarboxyphenyl)porphine, that links Cu{sub 2}(carboxylate){sub 4} moieties. A high density of 16 open copper sites confined within a nanoscopic polyhedral cage has been achieved, and the packing of the porphyrin cages via an 'ABAB' pattern affords MMPF-1 ultramicropores which render it selective toward adsorption of H{sub 2} and O{sub 2} over N{sub 2}, and CO{sub 2} over CH{sub 4}.
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.
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
Towards a reconstruction of macroeconomics using a stock flow consistent (SFC) model
Godley, Wynne
. Balancing ; (1) (2) current (3) capital (4) current (5)capital (6) item (7) 1. Inventories +I -I 0 2. Fixed capital +K -K 0 3. Cash +HP +HB -H 0 4. Current accounts +MC -MC 0 5. Deposit accounts +MD -MD 0 6. Bills +BP +BB... of interest on, respectively, bills, money, commercial bills and loans. (**) V (wealth) = NW+DG+I+K ; NW=net worth of firms, DG=government debt, I=inventories, K=fixed capital stock 4 postulated production sector, which we may describe...
9 Esta licenciatura ofrece un diploma tcnico intermedio, en qu consiste?
Islas, LeÃ³n
documentales. Â· Participar en la elaboraciÃ³n de inventarios y catÃ¡logos. Â· Cumplir tareas de administraciÃ³n de
Impaired learning of phonetic consistency and generalized neural adaptation deficits in dyslexia
Perrachione, Tyler K. (Tyler Kent)
2012-01-01T23:59:59.000Z
Developmental dyslexia is a neurological condition that specifically impairs the development of expert reading ability. Phonological processing deficits -- impaired representation of, or access to, the abstract units of ...
Andrei P. Kirilyuk
2014-05-26T23:59:59.000Z
A major challenge of interdisciplinary description of complex system behaviour is whether real systems of higher complexity levels can be understood with at least the same degree of objective, "scientific" rigour and universality as "simple" systems of classical, Newtonian science paradigm. The problem is reduced to that of arbitrary, many-body interaction (unsolved in standard theory). Here we review its causally complete solution, the ensuing concept of complexity and applications. The discovered key properties of dynamic multivaluedness and entanglement give rise to a qualitatively new kind of mathematical structure providing the exact version of real system behaviour. The extended mathematics of complexity contains the truly universal definition of dynamic complexity, randomness (chaoticity), classification of all possible dynamic regimes, and the unifying principle of any system dynamics and evolution, the universal symmetry of complexity. Every real system has a non-zero (and actually high) value of unreduced dynamic complexity determining, in particular, "mysterious" behaviour of quantum systems and relativistic effects causally explained now as unified manifestations of complex interaction dynamics. The observed differences between various systems are due to different regimes and levels of their unreduced dynamic complexity. We outline applications of universal concept of dynamic complexity emphasising cases of "truly complex" systems from higher complexity levels (ecological and living systems, brain operation, intelligence and consciousness, autonomic information and communication systems) and show that the urgently needed progress in social and intellectual structure of civilisation inevitably involves qualitative transition to unreduced complexity understanding (we call it "revolution of complexity").
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...
Empirical Earth rotation model: a consistent way to evaluate Earth orientation parameters
L. Petrov
2006-11-26T23:59:59.000Z
It is customary to perform analysis of the Earth's rotation in two steps: first, to present results of estimation of the Earth orientation parameters in the form of time series based on a simplified model of variations of the Earth's rotation for a short period of time, and then to process this time series of adjustments by applying smoothing, re-sampling and other numerical algorithms. Although this approach saves computational time, it suffers from self-inconsistency: total Earth orientation parameters depend on a subjective choice of the apriori Earth orientation model, cross-correlations between points of time series are lost, and results of an operational analysis per se have a limited use for end users. An alternative approach of direct estimation of the coefficients of expansion of Euler angle perturbations into basis functions is developed. These coefficients describe the Earth's rotation over entire period of observations and are evaluated simultaneously with station positions, source coordinates and other parameters in a single LSQ solution. In the framework of this approach considerably larger errors in apriori EOP model are tolerated. This approach gives a significant conceptual simplification of representation of the Earth's rotation.
Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine
Kroeger, Timothy H
2013-09-19T23:59:59.000Z
, revealing the premixed and diffusion burn fractions as well as important engine and exhaust design criteria such as maximum in-cylinder pressure and exhaust composition. These results are significant in diesel engine design because cheaper, lighter engines...
QuickRelease: A Throughput-oriented Approach to Release Consistency on GPUs
Wood, David A.
. HechtmanÂ§ , Shuai Che , Derek R. Hower , Yingying Tian , Bradford M. Beckmann , Mark D. Hill , Steven K and Engineering blake.hechtman@duke.edu {derek.hower, shuai.che, brad.beckmann, steve.reinhardt}@amd.com {markhill
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.
Myers, Glenn R. [Department of Applied Mathematics, Australian National University, Canberra ACT 0200 (Australia); Thomas, C. David L.; Clement, John G. [Melbourne Dental School, University of Melbourne, Melbourne 3010 (Australia); Paganin, David M. [School of Physics, Monash University, Clayton 3800 (Australia); CSIRO Materials Science and Engineering, PB 33, Clayton South, 3169 (Australia); Gureyev, Timur E. [CSIRO Materials Science and Engineering, PB 33, Clayton South, 3169 (Australia)
2010-01-11T23:59:59.000Z
We present a method for tomographic reconstruction of objects containing several distinct materials, which is capable of accurately reconstructing a sample from vastly fewer angular projections than required by conventional algorithms. The algorithm is more general than many previous discrete tomography methods, as: (i) a priori knowledge of the exact number of materials is not required; (ii) the linear attenuation coefficient of each constituent material may assume a small range of a priori unknown values. We present reconstructions from an experimental x-ray computed tomography scan of cortical bone acquired at the SPring-8 synchrotron.
Towards a fully consistent Milky Way disc model - III. Constraining the initial mass function
Rybizki, Jan
2015-01-01T23:59:59.000Z
We use our vertical Milky Way disc model together with Galaxia to create mock observations of stellar samples in the solar neighbourhood. We compare these to the corresponding volume complete observational samples of dereddened and binary accounted data from Hipparcos and the Catalogue of Nearby Stars. Sampling the likelihood in the parameter space we determine a new fiducial IMF considering constraints from dwarf and giant stars. The resulting IMF observationally backed in the range from 0.5 to 10 Msun is a two slope broken power law with -1.49 +- 0.08 for the low mass slope, a break at 1.39 +- 0.05 Msun and a high mass slope of -3.02 +- 0.06. The Besancon group also converging to a similar IMF even though their observational sample being quite different to ours shows that the forward modelling technique is a powerful diagnostic to test theoretical concepts like the local field star IMF.
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
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.
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
The complexity of the consistency and N-representability problems for quantum states
Liu, Yi-Kai
2007-01-01T23:59:59.000Z
D. Gottesman, and J. Kempe. The power of quantum systems onD. Aharonov, W. van Dam, J. Kempe, Z. Landau, S. Lloyd, andArxiv preprint: [51] J. Kempe, A. Kitaev, and O. Regev. The
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...
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...
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_\
Retrofit Audits and Cost Estimates: A Look at Quality and Consistency
Eisenberg, L.; Shapiro, C.; Fleischer, W.
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.
Plotkin, Joshua B.
orienting facets in polygon meshes by minimizing the Dirichlet energy of generalized winding numbers. While based on the Dirichlet energy of the generalized winding number. Our motivation came from the fact Dirichlet energy of the corresponding generalized winding number. 2 Method 2.1 Patch extraction
Consistency of MODIS surface bidirectional reflectance distribution function and albedo retrievals
Liang, Shunlin
as historical global albedos from advanced very high resolution radiometer (AVHRR) and Earth Radiation Budget albedos and the Clouds and Earth's Radiant Energy System (CERES) top-of-the-atmosphere albedos as well observations, and a high bias of 0.016 and a low bias of 0.034 compared to those of the latter albedos
Marsh, Helene
they are exposed. Samples to be collected for microbiology, histopathology and toxicology examinations should batteries for camera, flash and any other equipment · Data sheets (use standardised ones
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.
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
Szücs, Attila; Selverston, Allen I
2006-01-01T23:59:59.000Z
the emerging voltage oscillations and firing patterns. Ourresulted in smoother voltage oscillations in the neurons.induces irregular voltage oscillations. A shows the voltage
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.
Harilal, S. S.
that are transported during ELMs to the divertor surface. ELMs, therefore, can result in excessive divertor erosion, lithium, and neon in multidimensional geometry to inte- grate core, SOL parameters, and divertor surface-like devices during an ELM can then increase from %5 MW/m2 to %3003000 MW/m2 . The erosion losses of divertor
Advances in Neural Information Processing Systems 18, 2006 Convergence and Consistency of
Schapire, Robert
of Electrical Engineering Princeton University Princeton, NJ 08544 alozano@princeton.edu Sanjeev R. Kulkarni Department of Electrical Engineering Princeton University Princeton, NJ 08544 kulkarni@princeton.edu Robert E of stationary -mixing sequences. Utilizing a technique that constructs a sequence of independent blocks close
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.
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...
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...
Collins, Kent Michael
1995-01-01T23:59:59.000Z
.05 significance level. Analysis of observed 85th percentile speeds revealed that the current speed-profile model fits the observed data reasonably well. Hypothesis tests of mean observed 85th percentile speeds on tangents resulted in the conclusion that the mean...
MAGNETIC MODELING AND TOMOGRAPHY: FIRST STEPS TOWARDS A CONSISTENT RECONSTRUCTION OF THE SOLAR
Wiegelmann, Thomas
, and Ness, 1969; Sakurai, 1982; Rudenko, 2001a). Linear force-free fields (e.g., Nakagawa and Raadu, 1972
Parvan, A S
2015-01-01T23:59:59.000Z
In the present paper, the Tsallis statistics in the grand canonical ensemble was reconsidered in a general form. The thermodynamic properties of the nonrelativistic ideal gas of hadrons in the grand canonical ensemble was studied numerically and analytically in a finite volume and the thermodynamic limit. It was proved that the Tsallis statistics in the grand canonical ensemble satisfies the requirements of the equilibrium thermodynamics in the thermodynamic limit if the thermodynamic potential is a homogeneous function of the first order with respect to the extensive variables of state of the system and the entropic variable $z=1/(q-1)$ is an extensive variable of state. The equivalence of canonical, microcanonical and grand canonical ensembles for the nonrelativistic ideal gas of hadrons was demonstrated.
Munday, David Alexander
2013-01-01T23:59:59.000Z
management: an energy-efficient design based on a state-to design much simpler and more energy efficient systems.
Testing the consistency of the $\\omega\\pi$ transition form factor with unitarity and analyticity
Caprini, I
2015-01-01T23:59:59.000Z
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 ...
Gonzalez Abad, Karin G
2013-07-23T23:59:59.000Z
were computationally inefficient, showed thermodynamic inconsistencies, or required special laboratory experiments to characterize the fluid. The approach developed in this study uses a cubic equation of state to solve for vapor...
Annual Logging Symposium, June 16-20, 2012 SATURATION-HEIGHT AND INVASION CONSISTENT HYDRAULIC
Torres-Verdín, Carlos
clastic and carbonate reservoirs in multi-well contexts. It overcomes the limitation of the bulk volume on pore geometry, which relates to saturation-height modeling at a later stage in reservoir characterization. Additionally, pore geometry affects mud-filtrate invasion under over-balanced drilling conditions
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 the Geometric Brownian Motion Model of Stock Prices with Asymmetric Information.
Carmona, Rene
Engineering Quadrangle Princeton, NJ 08544-5263 Albina Danilova OCIAM Mathematical Institute University address correspondence to danilova@maths.ox.ac.uk. 1 #12;tic calculus and probability theory
Channel cracks in a hermetic coating consisting of organic and inorganic layers
Suo, Zhigang
displays, conformal sensors, and printable solar cells. These systems are thin, rugged, and lightweight- electronic and flexible electronic devices should be men- tioned. First, the magnitudes of strain in the two, the sub- strates in the two types of devices are different. While sub- strates for microelectronic devices
Self-consistent solution of cosmological radiation-hydrodynamics and chemical ionization
Reynolds, Daniel R. [Mathematics, Southern Methodist University, Dallas, TX 75275-0156 (United States)], E-mail: reynolds@smu.edu; Hayes, John C. [Lawrence Livermore National Lab, P.O. Box 808, L-551, Livermore, CA 94551 (United States)], E-mail: jchayes@llnl.gov; Paschos, Pascal [Ctr. for Astrophysics and Space Sciences, U.C. San Diego, La Jolla, CA 92093 (United States)], E-mail: ppaschos@minbari.ucsd.edu; Norman, Michael L. [Ctr. for Astrophysics and Space Sciences, U.C. San Diego, La Jolla, CA 92093 (United States); Physics Department, U.C. San Diego, La Jolla, CA 92093 (United States)], E-mail: mlnorman@ucsd.edu
2009-10-01T23:59:59.000Z
We consider a PDE system comprising compressible hydrodynamics, flux-limited diffusion radiation transport and chemical ionization kinetics in a cosmologically-expanding universe. Under an operator-split framework, the cosmological hydrodynamics equations are solved through the piecewise parabolic method, as implemented in the Enzo community hydrodynamics code. The remainder of the model, including radiation transport, chemical ionization kinetics, and gas energy feedback, form a stiff coupled PDE system, which we solve using a fully-implicit inexact Newton approach, and which forms the crux of this paper. The inner linear Newton systems are solved using a Schur complement formulation, and employ a multigrid-preconditioned conjugate gradient solver for the inner Schur systems. We describe this approach and provide results on a suite of test problems, demonstrating its accuracy, robustness, and scalability to very large problems.
Lawrence, Shawn A. (Shawn Adam), 1975-
2003-01-01T23:59:59.000Z
I use a Global Positioning System (GPS) velocity field to constrain block models of the eastern Mediterranean and surrounding regions that account for the angular velocities of constituent blocks and elastic strain ...
General Purpose NPN Transistor Array The CA3046 consists of five general purpose silicon NPN
Ravikumar, B.
· Custom Designed Differential Amplifiers · Temperature Compensated Amplifiers · See Application Note, AN of applications in low power systems in the DC through VHF range. They may be used as discrete transistors Match. . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A (Max) · Low Noise Figure
Wang, Bo
2011-08-08T23:59:59.000Z
in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Mariah Hahn Committee Members, Arul Jayaraman Melissa Grunlan Head of Department, Michael Pishko May... and Dr. Melissa Grunlan. They provided a lot of helpful insights and feedbacks. I?m especially grateful to Dr. Jayaraman for his permission to use the imaging system in his lab. I want to thank all of the graduate students of the Hahn lab who have...
Vahdat, Amin
Building Replicated Internet Services Using TACT: A Toolkit for Tunable Availability of scalable, high-performance, highly-available and fault-tolerant systems. Replication is an important ap in lower system availability in the presence of network partitions. Thus, there is a fundamen- tal tradeoff
ON CONSISTENCY OF CELL-VERTEX FINITE-VOLUME FORMULATIONS FOR VISCOELASTIC FLOW
Grant, P. W.
, given F(u), we 2 #12;can obtain the original discrete function f(x) by inverse DFT: f(x) = M-1 u=0 F
Consistency of wind erosion assessments across land use and land cover types: A critical analysis
Li, J; Okin, GS; Tatarko, J; Webb, NP; Herrick, JE
2014-01-01T23:59:59.000Z
of the SWEEP model during high wind on the Columbia Plateau.J.D. , 1998a. A single event wind erosion model. Trans. ASAEZobeck, T.M. , 1998. Revised Wind Erosion Equation (RWEQ).
Optical hydrogen absorption consistent with a thin bow shock leading the hot Jupiter HD 189733b
Cauley, P Wilson; Jensen, Adam G; Barman, Travis; Endl, Michael; Cochran, William D
2015-01-01T23:59:59.000Z
Bow shocks are ubiquitous astrophysical phenomena resulting from the supersonic passage of an object through a gas. Recently, pre-transit absorption in UV metal transitions of the hot Jupiter exoplanets HD 189733b and WASP12-b have been interpreted as being caused by material compressed in a planetary bow shock. Here we present a robust detection of a time-resolved pre-transit, as well as in-transit, absorption signature around the hot Jupiter exoplanet HD 189733b using high spectral resolution observations of several hydrogen Balmer lines. The line shape of the pre-transit feature and the shape of the time series absorption provide the strongest constraints on the morphology and physical characteristics of extended structures around an exoplanet. The in-transit measurements confirm the previous exospheric H-alpha detection although the absorption depth measured here is ~50% lower. The pre-transit absorption feature occurs 125 minutes before the predicted optical transit, a projected linear distance from the ...
" material during a given macroscopic loading. Following a remark of Mandel (1966),# Ricaud and Masson (2009
A Numerical Method for Two Phase Flow Consisting of Separate Compressible and
Soatto, Stefano
can be limiting because of the di#11;erence in sound speed between the liquid phase and gas phases mixing of liquids. We use the level set method to track the interface between the compressible and incom with large density ratios, e.g. the combustion of fuel droplets or the shock induced mixing of liquids
Status and Opportunities for Improving the Consistency of Technical Reference Manuals
Jayaweera, Tina
2013-01-01T23:59:59.000Z
Savings from TRM 12 New York Energy Efficiency Programs (2009) New York Standard Approach for Estimating Energy
Yang, Yun
University of Technology PO Box 218, Hawthorn, Melbourne, Australia 3122 {jchen, yyang, astrophysics or high energy physics [1, 2, 4, 15, 22]. Generally speaking, the whole working process of a grid workflow system can be divided into three stages: build- time, run-time instantiation and run
A protocol for consistent checkpointing recovery in time-stamp based distributed database systems
Swarnam, Prabaharan Ilanji
1992-01-01T23:59:59.000Z
access the data items in several sites and update them. Ilence, the checkpointing in a distributed database system is quite complicated since the atomicity of the global transaction must be reflected in the checkpoint. This research contributes a... FOR SCHEME K 69 C C CODE FOR SCHEME S 99 VITA 131 LIST OF FIGURES FIGURE Pa, ge 1 Inconsistent Checkpoint 18 2 Flow of the Simulation 3 Queue Delays at the Site 28 4 Mean Transaction Response and Restart Vs. Transaction Arrival Rate 5 Mean...
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
Torrellas, Josep
Support W. Ahn, S. Qi, M. Nicolaides, J. Torrellas University of Illinois at Urbana-Champaign dahn2,sqi2
Advances in Differential Equations Volume 11, Number 3 (2006), 305360 THE CONSISTENCY CONDITIONS AND
Fiedler, Bernold
2006-01-01T23:59:59.000Z
generalizations of nonlocal problems with transformations map- ping the boundary inside the closure of a domain investigation of elliptic problems with transformations mapping a bound- ary onto itself has been carried out]. In this case, solutions of nonlocal problems can have power-law singularities near some points of the boundary
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.