J. theor. Biol. (1989) 136, 365-377 Metabolic Control Theory and Biochemical Systems Theory
1989-01-01T23:59:59.000Z
J. theor. Biol. (1989) 136, 365-377 Metabolic Control Theory and Biochemical Systems Theory of the objectives and assumptions of metabolic control theory. In particular, the control and elasticity coefficients that play a central role in metabolic control theory are not constants and cannot be treated
Mutual information in time-varying biochemical systems
Filipe Tostevin; Pieter Rein ten Wolde
2010-06-16T23:59:59.000Z
Cells must continuously sense and respond to time-varying environmental stimuli. These signals are transmitted and processed by biochemical signalling networks. However, the biochemical reactions making up these networks are intrinsically noisy, which limits the reliability of intracellular signalling. Here we use information theory to characterise the reliability of transmission of time-varying signals through elementary biochemical reactions in the presence of noise. We calculate the mutual information for both instantaneous measurements and trajectories of biochemical systems for a Gaussian model. Our results indicate that the same network can have radically different characteristics for the transmission of instantaneous signals and trajectories. For trajectories, the ability of a network to respond to changes in the input signal is determined by the timing of reaction events, and is independent of the correlation time of the output of the network. We also study how reliably signals on different time-scales can be transmitted by considering the frequency-dependent coherence and gain-to-noise ratio. We find that a detector that does not consume the ligand molecule upon detection can more reliably transmit slowly varying signals, while an absorbing detector can more reliably transmit rapidly varying signals. Furthermore, we find that while one reaction may more reliably transmit information than another when considered in isolation, when placed within a signalling cascade the relative performance of the two reactions can be reversed. This means that optimising signal transmission at a single level of a signalling cascade can reduce signalling performance for the cascade as a whole.
Final Technical Report "Multiscale Simulation Algorithms for Biochemical Systems"
Petzold, Linda R.
2012-10-25T23:59:59.000Z
Biochemical systems are inherently multiscale and stochastic. In microscopic systems formed by living cells, the small numbers of reactant molecules can result in dynamical behavior that is discrete and stochastic rather than continuous and deterministic. An analysis tool that respects these dynamical characteristics is the stochastic simulation algorithm (SSA, Gillespie, 1976), a numerical simulation procedure that is essentially exact for chemical systems that are spatially homogeneous or well stirred. Despite recent improvements, as a procedure that simulates every reaction event, the SSA is necessarily inefficient for most realistic problems. There are two main reasons for this, both arising from the multiscale nature of the underlying problem: (1) stiffness, i.e. the presence of multiple timescales, the fastest of which are stable; and (2) the need to include in the simulation both species that are present in relatively small quantities and should be modeled by a discrete stochastic process, and species that are present in larger quantities and are more efficiently modeled by a deterministic differential equation (or at some scale in between). This project has focused on the development of fast and adaptive algorithms, and the fun- damental theory upon which they must be based, for the multiscale simulation of biochemical systems. Areas addressed by this project include: (1) Theoretical and practical foundations for ac- celerated discrete stochastic simulation (tau-leaping); (2) Dealing with stiffness (fast reactions) in an efficient and well-justified manner in discrete stochastic simulation; (3) Development of adaptive multiscale algorithms for spatially homogeneous discrete stochastic simulation; (4) Development of high-performance SSA algorithms.
Fluctuation preserving coarse graining for biochemical systems
Altaner, Bernhard
2011-01-01T23:59:59.000Z
Finite stochastic Markov models play a major role for modelling biochemical pathways. Such models are a coarse-grained description of the underlying microscopic dynamics and can be considered mesoscopic. The level of coarse-graining is to a certain extend arbitrary since it depends on the resolution of accomodating measurements. Here, we present a way to simplify such stochastic descriptions, which preserves both the meso-micro and the meso-macro connection. The former is achieved by demanding locality, the latter by considering cycles on the network of states. Using single- and multicycle examples we demonstrate how our new method preserves fluctuations of observables much better than na\\"ive approaches.
Stochastic Control Analysis for Biochemical Reaction Systems
Kyung Hyuk Kim; Herbert M. Sauro
2009-08-21T23:59:59.000Z
In this paper, we investigate how stochastic reaction processes are affected by external perturbations. We describe an extension of the deterministic metabolic control analysis (MCA) to the stochastic regime. We introduce stochastic sensitivities for mean and covariance values of reactant concentrations and reaction fluxes and show that there exist MCA-like summation theorems among these sensitivities. The summation theorems for flux variances are shown to depend on the size of the measurement time window ($\\epsilon$), within which reaction events are counted for measuring a single flux. The degree of the $\\epsilon$-dependency can become significant for processes involving multi-time-scale dynamics and is estimated by introducing a new measure of time scale separation. This $\\epsilon$-dependency is shown to be closely related to the power-law scaling observed in flux fluctuations in various complex networks. We propose a systematic way to control fluctuations of reactant concentrations while minimizing changes in mean concentration levels. Such orthogonal control is obtained by introducing a control vector indicating the strength and direction of parameter perturbations leading to a sensitive control. We also propose a possible implication in the control of flux fluctuation: The control distribution for flux fluctuations changes with the measurement time window size, $\\epsilon$. When a control engineer applies a specific control operation on a reaction system, the system can respond contrary to what is expected, depending on the time window size $\\epsilon$.
Decomposing Noise in Biochemical Signaling Systems Highlights the Role of Protein Degradation
Miekisz, Jacek
Decomposing Noise in Biochemical Signaling Systems Highlights the Role of Protein Degradation Micha degradation on the overall variability for a range of molecular processes and signaling systems. With our are able to show how regulated protein degradation can be employed to reduce the noise in biochem- ical
Accurate hybrid stochastic simulation of a system of coupled chemical or biochemical reactions
Minnesota, University of
Accurate hybrid stochastic simulation of a system of coupled chemical or biochemical reactions reactions, approximates the fast reactions as a continuous Markov process, using a chemical Langevin multiple slow reactions may occur within a time step of the numerical integration of the chemical Langevin
Statistical mechanical theory for steady state systems. VII. Nonlinear theory
Attard, Phil
Statistical mechanical theory for steady state systems. VII. Nonlinear theory Phil Attard School May 2007; published online 2 July 2007 The second entropy theory for nonequilibrium thermodynamics explicitly as a type of the Green-Kubo equilibrium time correlation function. The theory is illustrated
Control Theory of Digitally Networked Dynamic Systems
Knobloch,JÃ¼rgen
Control Theory of Digitally Networked Dynamic Systems #12;Jan Lunze Editor Control Theory control technology for mobile objects. Due to this flexibility, a new challenge for control theory about networked control systems as a new area of control theory. This book gives a concise introduc
Chapter Ten Control System Theory Overview
Gajic, Zoran
Chapter Ten Control System Theory Overview In this book we have presented results mostly interval. These problems are addressed in modern optimal control theory. The most recent approach to optimal control theory emerged in the early eighties. This approach is called the optimal control theory
5th Elgersburg School Mathematical Systems Theory
Knobloch,Jürgen
5th Elgersburg School Mathematical Systems Theory February 18-22, 2013 Control in Power Electronics George Weiss Infinite-Dimensional Systems Hans Zwart George Weiss is professor of Systems and Control En). In parallel, he has been active in control theory (in particular, internal model based control) applied
A Credibility Theory for Automobile Bonus Systems
Maume-Deschamps, Véronique
R. Norberg A Credibility Theory for Automobile Bonus Systems Reprinted from Scandinaviun Actuarial Journal, 1976 #12;Scand. Actuarial J. 1976:92-107 A CredibilityTheory for Automobile Bonus Systems rating systems of the bonus type, commonly used in automobile insurance. On the basis of a simple model
Theory and Simulation of Multiphase Polymer Systems
Friederike Schmid
2010-01-08T23:59:59.000Z
The theory of multiphase polymer systems has a venerable tradition. The 'classical' theory of polymer demixing, the Flory-Huggins theory, was developed already in the forties of the last century. It is still the starting point for most current approaches -- be they improved theories for polymer (im)miscibility that take into account the microscopic structure of blends more accurately, or sophisticated field theories that allow to study inhomogeneous multicomponent systems of polymers with arbitrary architectures in arbitrary geometries. In contrast, simulations of multiphase polymer systems are relatively young. They are still limited by the fact that one must simulate a large number of large molecules in order to obtain meaningful results. Both powerful computers and smart modeling and simulation approaches are necessary to overcome this problem. This article gives an overview over the state-of-the art in both areas, theory and simulation. While the theory has reached a fairly mature stage by now, and many aspects of it are covered in textbooks on polymer physics, the information on simulations is much more scattered. This is why some effort has been invested into putting together a representative list of references in this area (up to the year of 2008) -- which is of course still far from complete.
Effective Field Theory and Finite Density Systems
R. J. Furnstahl; G. Rupak; T. Schaefer
2008-01-04T23:59:59.000Z
This review gives an overview of effective field theory (EFT) as applied at finite density, with a focus on nuclear many-body systems. Uniform systems with short-range interactions illustrate the ingredients and virtues of many-body EFT and then the varied frontiers of EFT for finite nuclei and nuclear matter are surveyed.
INFORMATION THEORY AND DYNAMICAL SYSTEM PREDICTABILITY
such as the atmosphere and ocean as well as earthquake prediction for which the system can be considered even more nonINFORMATION THEORY AND DYNAMICAL SYSTEM PREDICTABILITY RICHARD KLEEMAN Abstract. Predicting of obtaining practical results for prediction also guides the development presented. 1. Introduction Prediction
Solar System Constraints on Disformal Gravity Theories
Hiu Yan Ip; Jeremy Sakstein; Fabian Schmidt
2015-07-02T23:59:59.000Z
Disformal theories of gravity are scalar-tensor theories where the scalar couples derivatively to matter via the Jordan frame metric. These models have recently attracted interest in the cosmological context since they admit accelerating solutions. We derive the solution for a static isolated mass in generic disformal gravity theories and transform it into the parameterised post-Newtonian form. This allows us to investigate constraints placed on such theories by local tests of gravity. The tightest constraints come from preferred-frame effects due to the motion of the Solar System with respect to the evolving cosmological background field. The constraints we obtain improve upon the previous solar system constraints by two orders of magnitude, and constrain the scale of the disformal coupling for generic models to $\\mathcal{M} \\gtrsim 100$ eV. These constraints render all disformal effects irrelevant for cosmology.
Solar System Constraints on Disformal Gravity Theories
Ip, Hiu Yan; Schmidt, Fabian
2015-01-01T23:59:59.000Z
Disformal theories of gravity are scalar-tensor theories where the scalar couples derivatively to matter via the Jordan frame metric. These models have recently attracted interest in the cosmological context since they admit accelerating solutions. We derive the solution for a static isolated mass in generic disformal gravity theories and transform it into the parameterised post-Newtonian form. This allows us to investigate constraints placed on such theories by local tests of gravity. The tightest constraints come from preferred-frame effects due to the motion of the Solar System with respect to the evolving cosmological background field. The constraints we obtain improve upon the previous solar system constraints by two orders of magnitude, and constrain the scale of the disformal coupling for generic models to $\\mathcal{M} \\gtrsim 100$ eV. These constraints render all disformal effects irrelevant for cosmology.
Extended Hamiltonian systems in multisymplectic field theories
Echeverria-Enriquez, Arturo; Leon, Manuel de; Munoz-Lecanda, Miguel C.; Roman-Roy, Narciso [Departamento de Matematica Aplicada IV, Campus Norte UPC, Edificio C-3, C/Jordi Girona 1, E-08034 Barcelona (Spain); Instituto de Matematicas y Fisica Fundamental, CSIC, C/Serrano 123, E-28006 Madrid (Spain); Departamento de Matematica Aplicada IV, Campus Norte UPC, Edificio C-3, C/Jordi Girona 1, E-08034 Barcelona (Spain)
2007-11-15T23:59:59.000Z
We consider Hamiltonian systems in first-order multisymplectic field theories. We review the properties of Hamiltonian systems in the so-called restricted multimomentum bundle, including the variational principle which leads to the Hamiltonian field equations. In an analogous way to how these systems are defined in the so-called extended (symplectic) formulation of nonautonomous mechanics, we introduce Hamiltonian systems in the extended multimomentum bundle. The geometric properties of these systems are studied, the Hamiltonian equations are analyzed using integrable multivector fields, the corresponding variational principle is also stated, and the relation between the extended and the restricted Hamiltonian systems is established. All these properties are also adapted to certain kinds of submanifolds of the multimomentum bundles in order to cover the case of almost-regular field theories.
Preface for Mathematical Control Theory: Deterministic Finite Dimensional Systems
Sontag, Eduardo
with the symbol 3 . Control and system theory shares with some other areas of "modern" applied m* and results of mathematical control* * and system theory. Based on courses that I have taught during the last of control theory: The alge* *braic theory of linear systems, including controllability, observability
Open quantum systems and Random Matrix Theory
Declan Mulhall
2015-01-09T23:59:59.000Z
A simple model for open quantum systems is analyzed with Random Matrix Theory. The system is coupled to the continuum in a minimal way. In this paper we see the effect of opening the system on the level statistics, in particular the $\\Delta_3(L)$ statistic, width distribution and level spacing are examined as a function of the strength of this coupling. A super-radiant transition is observed, and it is seen that as it is formed, the level spacing and $\\Delta_3(L)$ statistic exhibit the signatures of missed levels.
A Linear Framework for Time-Scale Separation in Nonlinear Biochemical Systems
Gunawardena, Jeremy
permits unrestricted use, distribution, and reproduction in any medium, provided the original author combinatorial construction of vast numbers of molecular states, [2]. How such complexity evolves and how system and its environment adjust on slower time-scales to the steady-state of the sub
A Gentle Introduction to Dynamical Systems Theory
Beer, Randall D.
A Gentle Introduction to Dynamical Systems Theory Reading: Chapter 1 #12;IU/COGS-Q580/Beer Isaac = -F2 = G m1m2 r2 #12;IU/COGS-Q580/Beer Henri Poincaré and His 3 Bodies Diacu, F. and Holmes, P. (1996 to almost all differential equations cannot be expressed as an explicit formula #12;IU/COGS-Q580/Beer
Scattering Theory for Open Quantum Systems
J. Behrndt; M. M. Malamud; H. Neidhardt
2006-10-31T23:59:59.000Z
Quantum systems which interact with their environment are often modeled by maximal dissipative operators or so-called Pseudo-Hamiltonians. In this paper the scattering theory for such open systems is considered. First it is assumed that a single maximal dissipative operator $A_D$ in a Hilbert space $\\sH$ is used to describe an open quantum system. In this case the minimal self-adjoint dilation $\\widetilde K$ of $A_D$ can be regarded as the Hamiltonian of a closed system which contains the open system $\\{A_D,\\sH\\}$, but since $\\widetilde K$ is necessarily not semibounded from below, this model is difficult to interpret from a physical point of view. In the second part of the paper an open quantum system is modeled with a family $\\{A(\\mu)\\}$ of maximal dissipative operators depending on energy $\\mu$, and it is shown that the open system can be embedded into a closed system where the Hamiltonian is semibounded. Surprisingly it turns out that the corresponding scattering matrix can be completely recovered from scattering matrices of single Pseudo-Hamiltonians as in the first part of the paper. The general results are applied to a class of Sturm-Liouville operators arising in dissipative and quantum transmitting Schr\\"{o}dinger-Poisson systems.
Systems of two heavy quarks with effective field theories
Nora Brambilla
2006-09-22T23:59:59.000Z
I discuss results and applications of QCD nonrelativistic effective field theories for systems with two heavy quarks.
Exterior Differential Systems for Field Theories
Frank B. Estabrook
2015-02-24T23:59:59.000Z
Exterior Differential Systems (EDS) and Cartan forms, set in the state space of field variables taken together with four space-time variables, are formulated for classical gauge theories of Maxwell and SU(2) Yang-Mills fields minimally coupled to Dirac spinor multiplets. Cartan character tables are calculated, showing whether the EDS, and so the Euler-Lagrange partial differential equations, is well-posed. The first theory, with 22 dimensional state space (10 Maxwell field and potential components and 8 components of a Dirac field), anticipates QED. In the second, non-Abelian, case (30 Yang-Mills field components and 16 Dirac), only if three additional "ghost" fields are included (15 more scalar variables) is a well-posed EDS found. This classical formulation anticipates the need for introduction of Fadeev-Popov ghost fields in the quantum standard model.
Communication Theory of Secrecy Systems By C. E. SHANNON
Babinkostova, Liljana
Communication Theory of Secrecy Systems By C. E. SHANNON 1 INTRODUCTION AND SUMMARY The problems of cryptography and secrecy systems furnish an interesting ap- plication of communication theory1 . In this paper Theory of Communication," Bell System Technical Journal, July 1948, p.379; Oct. 1948, p.623. 2 See
Quantum field theory of relic nonequilibrium systems
Nicolas G. Underwood; Antony Valentini
2014-11-14T23:59:59.000Z
In terms of the de Broglie-Bohm pilot-wave formulation of quantum theory, we develop field-theoretical models of quantum nonequilibrium systems which could exist today as relics from the very early universe. We consider relic excited states generated by inflaton decay, as well as relic vacuum modes, for particle species that decoupled close to the Planck temperature. Simple estimates suggest that, at least in principle, quantum nonequilibrium could survive to the present day for some relic systems. The main focus of this paper is to describe the behaviour of such systems in terms of field theory, with the aim of understanding how relic quantum nonequilibrium might manifest experimentally. We show by explicit calculation that simple perturbative couplings will transfer quantum nonequilibrium from one field to another (for example from the inflaton field to its decay products). We also show that fields in a state of quantum nonequilibrium will generate anomalous spectra for standard energy measurements. Possible connections to current astrophysical observations are briefly addressed.
On the Reliability of System Identification: Applications of Bootstrap Theory
Kareem, Ahsan
1 On the Reliability of System Identification: Applications of Bootstrap Theory T. Kijewski & A of Notre Dame, Notre Dame, IN, USA Keywords: bootstrapping, system identification, Monte Carlo, damping
Feedback Control Theory and Processing System Log Streams Research Project
Tang, Pingzhong
Feedback Control Theory and Processing System Log Streams by Wei Xu Research Project Submitted, and on exploring general techniques of applying feedback control theory to distributed computer systems. We have. All problems addressed are solved systematically with feedback-control-theory. We discuss three uses
Philosophical Smoke Signals: Theory and Practice in Information Systems Design
David King; Chris Kimble
2008-04-17T23:59:59.000Z
Although the gulf between the theory and practice in Information Systems is much lamented, few researchers have offered a way forward except through a number of (failed) attempts to develop a single systematic theory for Information Systems. In this paper, we encourage researchers to re-examine the practical consequences of their theoretical arguments. By examining these arguments we may be able to form a number of more rigorous theories of Information Systems, allowing us to draw theory and practice together without undertaking yet another attempt at the holy grail of a single unified systematic theory of Information Systems.
From Computability to Concurrency Theory Calculus of Comunicating Systems CCS
Valencia, Frank D.
From Computability to Concurrency Theory Calculus of Comunicating Systems CCS Mobility and the pi Paris (LIX) Oct 2005/CLEI'05 CLEI'05 Cali Communicating and Mobile Systems #12;From Computability #12;From Computability to Concurrency Theory Calculus of Comunicating Systems CCS Mobility and the pi
The Danger Theory and Its Application to Artificial Immune Systems
Somayaji, Anil
The Danger Theory and Its Application to Artificial Immune Systems Uwe Aickelin1 , Steve Cayzer.aickelin@bradford.ac.uk, Steve_Cayzer@hp.com artificial immune systems, danger theory Over the last decade, a new idea in the Artificial Immune Systems world. A number of potential application areas are then used to provide a framing
Elements of Information Theory for Networked Control Systems
Franceschetti, Massimo
Chapter 1 Elements of Information Theory for Networked Control Systems Massimo Franceschetti. This challenges the standard assumption of classical control theory that communication can be per- formed and control theories and can be written in various forms. These are illustrated in Sect. 1.4, along
Some new directions in control theory inspired by systems biology
Sontag, Eduardo
Some new directions in control theory inspired by systems biology E.D. Sontag Abstract: This paper, addressed primarily to engineers and mathematicians with an interest in control theory, argues that entirely, optimal control, and other well-developed areas of control theory in the analysis and solution of problems
Introduction to Control Theory And Its Application to Computing Systems
Lu, Chenyang
Chapter 7 Introduction to Control Theory And Its Application to Computing Systems Tarek Abdelzaher the design of feedback control in an ad hoc manner. Control theory provides a systematic ap- proach to their steady state values. This pa- per provides an introduction to control theory for computing practitioners
On the Hamilton-Jacobi Theory for Singular Lagrangian Systems
Manuel de León; Juan Carlos Marrero; David Martín de Diego; Miguel Vaquero
2012-04-27T23:59:59.000Z
We develop a Hamilton-Jacobi theory for singular lagrangian systems using the Gotay-Nester-Hinds constraint algorithm. The procedure works even if the system has secondary constraints.
The quantum systems control and the optimal control theory
V. F. Krotov
2008-05-22T23:59:59.000Z
Mathematical theory of the quantum systems control is based on some ideas of the optimal control theory. These ideas are developed here as applied to these systems. The results obtained meet the deficiencies in the basis and algorithms of the control synthesis and expand the application of these methods.
Conference and Journal Publications in Database Systems and Theory
Zhou, Yuanyuan
Conference and Journal Publications in Database Systems and Theory This document rates the conferences and journal publications in the database area with respect to quality and impact. As in many other systems and the database theory areas. A key issue we address is the relative importance of conference
Upcoming Numerical Linear Algebra Issues in Systems and Control Theory
Upcoming Numerical Linear Algebra Issues in Systems and Control Theory Paul Van Dooren University in the interdisciplinary area of numerical linear algebra and systems and control theory. Although we do not claimto, and normalized coprime factorizations in robust control. Key words. Numerical algorithms, linear algebra, sparse
Upcoming Numerical Linear Algebra Issues in Systems and Control Theory
Upcoming Numerical Linear Algebra Issues in Systems and Control Theory Paul Van Dooren University in the interdisciplinary area of numerical linear algebra and systems and control theory. Although we do not claim, and normalized coprime factorizations in robust control. Key words. Numerical algorithms, linear algebra, sparse
Biochemical transformation of coals
Lin, Mow S. (Rocky Point, NY); Premuzic, Eugene T. (East Moriches, NY)
1999-03-23T23:59:59.000Z
A method of biochemically transforming macromolecular compounds found in solid carbonaceous materials, such as coal is provided. The preparation of new microorganisms, metabolically weaned through challenge growth processes to biochemically transform solid carbonaceous materials at extreme temperatures, pressures, pH, salt and toxic metal concentrations is also disclosed.
Biochemical transformation of coals
Lin, M.S.; Premuzic, E.T.
1999-03-23T23:59:59.000Z
A method of biochemically transforming macromolecular compounds found in solid carbonaceous materials, such as coal is provided. The preparation of new microorganisms, metabolically weaned through challenge growth processes to biochemically transform solid carbonaceous materials at extreme temperatures, pressures, pH, salt and toxic metal concentrations is also disclosed. 7 figs.
N=2 supersymmetric gauge theories and quantum integrable systems
Yuan Luo; Meng-Chwan Tan; Junya Yagi
2014-04-01T23:59:59.000Z
We study N=2 supersymmetric gauge theories on the product of a two-sphere and a cylinder. We show that the low-energy dynamics of a BPS sector of such a theory is described by a quantum integrable system, with the Planck constant set by the inverse of the radius of the sphere. If the sphere is replaced with a hemisphere, then our system reduces to an integrable system of the type studied by Nekrasov and Shatashvili. In this case we establish a correspondence between the effective prepotential of the gauge theory and the Yang-Yang function of the integrable system.
Pure subtype systems: a type theory for extensible software
Hutchins, DeLesley
2009-01-01T23:59:59.000Z
This thesis presents a novel approach to type theory called “pure subtype systems”, and a core calculus called DEEP which is based on that approach. DEEP is capable of modeling a number of interesting language techniques ...
Open quantum systems and random matrix theory
Mulhall, Declan [Department of Physics/Engineering, University of Scranton, Scranton, Pennsylvania 18510-4642 (United States)
2014-10-15T23:59:59.000Z
A simple model for open quantum systems is analyzed with RMT. The system is coupled to the continuum in a minimal way. In this paper we see the effect of opening the system on the level statistics, in particular the level spacing, width distribution and ?{sub 3}(L) statistic are examined as a function of the strength of this coupling. The usual super-radiant state is observed, and it is seen that as it is formed, the level spacing and ?{sub 3}(L) statistic exhibit the signatures of missed levels.
Density functional theory for self-bound systems
Nir Barnea
2007-11-06T23:59:59.000Z
The density functional theory is extended to account for self-bound systems. To this end the Hohenberg-Kohn theorem is formulated for the intrinsic density and a Kohn-Sham like procedure for an $N$--body system is derived using the adiabatic approximation to account for the center of mass motion.
Control System Design Using Finite Laplace Transform Theory
Das, Subhendu
2011-01-01T23:59:59.000Z
The Laplace transform theory violates a very fundamental requirement of all engineering systems. We show that this theory assumes that all signals must exist over infinite time interval. Since in engineering this infinite time assumption is not meaningful and feasible, this paper presents a design for linear control systems using the well known theory of Finite Laplace transform (FLT). The major contributions of this paper can be listed as: (a) A design principle for linear control systems using FLT, (b) A numerical inversion method for the FLT with examples, (c) A proof that the FLT does not satisfy the convolution theorem as normally required in engineering design and analysis, and (d) An observation that the FLT is conceptually similar to the analog equivalent of the Finite Impulse Response (FIR) digital filter.
Nonlinear Dynamics of Quantum Systems and Soliton Theory
Eldad Bettelheim; Alexander G. Abanov; Paul Wiegmann
2006-10-26T23:59:59.000Z
We show that space-time evolution of one-dimensional fermionic systems is described by nonlinear equations of soliton theory. We identify a space-time dependence of a matrix element of fermionic systems related to the {\\it Orthogonality Catastrophe} or {boundary states} with the $\\tau$-function of the modified KP-hierarchy. The established relation allows to apply the apparatus of soliton theory to the study of non-linear aspects of quantum dynamics. We also describe a {\\it bosonization in momentum space} - a representation of a fermion operator by a Bose field in the presence of a boundary state.
Premuzic, E.T.; Lin, M.S.
1999-01-12T23:59:59.000Z
A process for biochemical conversion of heavy crude oils is provided. The process includes contacting heavy crude oils with adapted biocatalysts. The resulting upgraded oil shows, a relative increase in saturated hydrocarbons, emulsions and oxygenates and a decrease in compounds containing organic sulfur, organic nitrogen and trace metals. Adapted microorganisms which have been modified under challenged growth processes are also disclosed. 121 figs.
Premuzic, Eugene T. (East Moriches, NY); Lin, Mow S. (Rocky Point, NY)
1999-01-12T23:59:59.000Z
A process for biochemical conversion of heavy crude oils is provided. The process includes contacting heavy crude oils with adapted biocatalysts. The resulting upgraded oil shows, a relative increase in saturated hydrocarbons, emulsions and oxygenates and a decrease in compounds containing in organic sulfur, organic nitrogen and trace metals. Adapted microorganisms which have been modified under challenged growth processes are also disclosed.
Nonlinear Biochemical Signal Processing via Noise Propagation
Kyung Hyuk Kim; Hong Qian; Herbert M. Sauro
2013-09-10T23:59:59.000Z
Single-cell studies often show significant phenotypic variability due to the stochastic nature of intra-cellular biochemical reactions. When the numbers of molecules, e.g., transcription factors and regulatory enzymes, are in low abundance, fluctuations in biochemical activities become significant and such "noise" can propagate through regulatory cascades in terms of biochemical reaction networks. Here we develop an intuitive, yet fully quantitative method for analyzing how noise affects cellular phenotypes based on identifying a system's nonlinearities and noise propagations. We observe that such noise can simultaneously enhance sensitivities in one behavioral region while reducing sensitivities in another. Employing this novel phenomenon we designed three biochemical signal processing modules: (a) A gene regulatory network that acts as a concentration detector with both enhanced amplitude and sensitivity. (b) A non-cooperative positive feedback system, with a graded dose-response in the deterministic case, that serves as a bistable switch due to noise-induced bimodality. (c) A noise-induced linear amplifier for gene regulation that requires no feedback. The methods developed in the present work allow one to understand and engineer nonlinear biochemical signal processors based on fluctuation-induced phenotypes.
APPROXIMATION THEORY OF OUTPUT STATISTICS Dept. Information Systems
Verdú, Sergio
. In order to generate a ran- dom process we assume that a primary random source with an equiprobableAPPROXIMATION THEORY OF OUTPUT STATISTICS Te Sun Han Dept. Information Systems Senshu University-length) source coding rate of any finite-alphabet source, and a strong converse of the identijication coding
Boundary String Field Theory of the DDbar System
Kraus, P; Kraus, Per; Larsen, Finn
2001-01-01T23:59:59.000Z
We develop the boundary string field theory approach to tachyon condensation on the DDbar system. Particular attention is paid to the gauge fields, which combine with the tachyons in a natural way. We derive the RR-couplings of the system and express the result in terms of Quillen's superconnection. The result is related to an index theorem, and is thus shown to be exact.
Quantitative training system assessments using General Systems Performance Theory
Kashyap, Sujatha
2000-01-01T23:59:59.000Z
of training. Furthermore, performance evaluations of CBT systems to date have been performed using ad-hoc, context-specific methods. There is thus a need to provide a uniform basis for performance assessments of computer-based training systems. This thesis...
for an Activity Theory based Methodology to guide Computer System Design Daisy Mwanza Knowledge Media Institute, The Open University, Milton Keynes, MK7 6AA, United Kingdom D.Mwanza@open.ac.uk Abstract: Computer system a computer system. Activity Theory (AT) has emerged as a suitable framework for analysing social and cultural
Complex geometric optics for symmetric hyperbolic systems I: linear theory
Omar Maj
2008-02-12T23:59:59.000Z
We obtain an asymptotic solution for $\\ep \\to 0$ of the Cauchy problem for linear first-order symmetric hyperbolic systems with oscillatory initial values written in the eikonal form of geometric optics with frequency $1/\\ep$, but with complex phases. For the most common linear wave propagation models, this kind on Cauchy problems are well-known in the applied literature and their asymptotic theory, referred to as complex geometric optics, is attracting interest for applications. In this work, which is the first of a series of papers dedicated to complex geometric optics for nonlinear symmetric hyperbolic systems, we develop a rigorous linear theory and set the basis for the subsequent nonlinear analysis.
Geometric Hamilton-Jacobi Theory for Nonholonomic Dynamical Systems
J. F. Cariñena; X. Gracia; G. Marmo; E. Martinez; M. C. Muñoz-Lecanda; N. Roman--Roy
2009-08-17T23:59:59.000Z
The geometric formulation of Hamilton--Jacobi theory for systems with nonholonomic constraints is developed, following the ideas of the authors in previous papers. The relation between the solutions of the Hamilton--Jacobi problem with the symplectic structure defined from the Lagrangian function and the constraints is studied. The concept of complete solutions and their relationship with constants of motion, are also studied in detail. Local expressions using quasivelocities are provided. As an example, the nonholonomic free particle is considered.
Quantitative training system assessments using General Systems Performance Theory
Kashyap, Sujatha
2000-01-01T23:59:59.000Z
to the user button pressed 35 III Colors used for aircraft in the simulations 40 IV Events in the target task and corresponding entries in Events log . . 47 V Entry in TraineeActions. log correspondmg to the mouse button clicked 48 VI Confidence levels... RD T~k k n RD Task i Task j (0, 0) RD Task i 1 RD Task k DOP2 Fig. 6. Characterization of a task considering 2 DOPs the typing system, our typing task may require a minimum speed of 60 words per minute and a minimum accuracy of 80%. Thus, task...
Density Functional Resonance Theory of Unbound Electronic Systems
Daniel L. Whitenack; Adam Wasserman
2011-06-20T23:59:59.000Z
Density Functional Resonance Theory (DFRT) is a complex-scaled version of ground-state Density Functional Theory (DFT) that allows one to calculate the resonance energies and lifetimes of metastable anions. In this formalism, the exact energy and lifetime of the lowest-energy resonance of unbound systems is encoded into a complex "density" that can be obtained via complex-coordinate scaling. This complex density is used as the primary variable in a DFRT calculation just as the ground-state density would be used as the primary variable in DFT. As in DFT, there exists a mapping of the N-electron interacting system to a Kohn-Sham system of N non-interacting particles in DFRT. This mapping facilitates self consistent calculations with an initial guess for the complex density, as illustrated with an exactly-solvable model system. Whereas DFRT yields in principle the exact resonance energy and lifetime of the interacting system, we find that neglecting the complex-correlation contribution leads to errors of similar magnitude to those of standard scattering close-coupling calculations under the bound-state approximation.
Effective Holographic Theories for low-temperature condensed matter systems
C. Charmousis; B. Goutéraux; B. S. Kim; E. Kiritsis; Rene Meyer
2010-09-30T23:59:59.000Z
The IR dynamics of effective holographic theories capturing the interplay between charge density and the leading relevant scalar operator at strong coupling are analyzed. Such theories are parameterized by two real exponents $(\\gamma,\\delta)$ that control the IR dynamics. By studying the thermodynamics, spectra and conductivities of several classes of charged dilatonic black hole solutions that include the charge density back reaction fully, the landscape of such theories in view of condensed matter applications is characterized. Several regions of the $(\\gamma,\\delta)$ plane can be excluded as the extremal solutions have unacceptable singularities. The classical solutions have generically zero entropy at zero temperature, except when $\\gamma=\\delta$ where the entropy at extremality is finite. The general scaling of DC resistivity with temperature at low temperature, and AC conductivity at low frequency and temperature across the whole $(\\gamma,\\delta)$ plane, is found. There is a codimension-one region where the DC resistivity is linear in the temperature. For massive carriers, it is shown that when the scalar operator is not the dilaton, the DC resistivity scales as the heat capacity (and entropy) for planar (3d) systems. Regions are identified where the theory at finite density is a Mott-like insulator at T=0. We also find that at low enough temperatures the entropy due to the charge carriers is generically larger than at zero charge density.
Information theory of quantum systems with some hydrogenic applications
J. S. Dehesa; D. Manzano; P. S. Sánchez-Moreno; R. J. Yáñez
2010-09-14T23:59:59.000Z
The information-theoretic representation of quantum systems, which complements the familiar energy description of the density-functional and wave-function-based theories, is here discussed. According to it, the internal disorder of the quantum-mechanical non-relativistic systems can be quantified by various single (Fisher information, Shannon entropy) and composite (e.g. Cramer-Rao, LMC shape and Fisher-Shannon complexity) functionals of the Schr\\"odinger probability density. First, we examine these concepts and its application to quantum systems with central potentials. Then, we calculate these measures for hydrogenic systems, emphasizing their predictive power for various physical phenomena. Finally, some recent open problems are pointed out.
Disformal Theories of Gravity: From the Solar System to Cosmology
Jeremy Sakstein
2014-10-20T23:59:59.000Z
This paper is concerned with theories of gravity that contain a scalar coupled both conformally and disformally to matter through the metric. By systematically deriving the non-relativistic limit, it is shown that no new non-linear screening mechanisms are present beyond the Vainshtein mechanism and chameleon-like screening. If one includes the cosmological expansion of the universe, disformal effects that are usually taken to be absent can be present in the solar system. When the conformal factor is absent, fifth-forces can be screened on all scales when the cosmological field is slowly-rolling. We investigate the cosmology of these models and use local tests of gravity to place new constraints on the disformal coupling and find $\\mathcal{M}>\\mathcal{O}(\\textrm{eV})$, which is not competitive with laboratory tests. Finally, we discuss the future prospects for testing these theories and the implications for other theories of modified gravity. In particular, the Vainshtein radius of solar system objects can be altered from the static prediction when cosmological time-derivatives are non-negligible.
Department for Analysis and Computational Number Theory Additive functions and number systems
Department for Analysis and Computational Number Theory Additive functions and number systems systems April 7, 2010 1 / 35 #12;Department for Analysis and Computational Number Theory Outline Number and Computational Number Theory Number systems Let R be an integral domain, b R, and N = {n1, . . . , nm} R
Signal and System Theory II, BSc, Winter 2008 Automatic Control Laboratory D-ITET
Lygeros, John
Signal and System Theory II, BSc, Winter 2008 Automatic Control Laboratory D-ITET ETH Zurich Winter happens to the state as t using the final value theorem. 1 #12;Signal and System Theory II, BSc, Winter T seconds. Do you believe her? Justify your answer. 2 #12;Signal and System Theory II, BSc, Winter 2008
Field Theory Techniques on Spin Systems Physics 230A, Spring 2007, Hitoshi Murayama
Murayama, Hitoshi
Field Theory Techniques on Spin Systems Physics 230A, Spring 2007, Hitoshi Murayama 1 Introduction to understand using the quantum field theory techniques. In order to use techniques in continuum field theory would like to do now is to rewrite this Hamiltonian in terms of continuum field theory. The first step
Vallino, Joseph J.
Theory: Biological systems organize to maximize entropy production subject to information: biological systems store information within their metagenome. Therefore, we propose that abiotic systems that biological systems with greater information content will have higher entropy production rates than biological
Transition State Theory for dissipative systems without a dividing surface
Revuelta, F; Benito, R M; Borondo, F
2015-01-01T23:59:59.000Z
Transition State Theory is a central cornerstone in reaction dynamics. Its key step is the identification of a dividing surface that is crossed only once by all reactive trajectories. This assumption is often badly violated, especially when the reactive system is coupled to an environment. The calculations made in this way then overestimate the reaction rate and the results depend critically on the choice of the dividing surface. In this Letter, we study the phase space of a stochastically driven system close to an energetic barrier in order to identify the geometric structure unambiguously determining the reactive trajectories, which is then incorporated in a simple rate formula for reactions in condensed phase that is both independent of the dividing surface and exact.
A General Systems Theory for Rain Formation in Warm Clouds
A. M. Selvam
2014-08-15T23:59:59.000Z
A cumulus cloud model which can explain the observed characteristics of warm rain formation in monsoon clouds is presented. The model is based on classical statistical physical concepts and satisfies the principle of maximum entropy production. Atmospheric flows exhibit selfsimilar fractal fluctuations that are ubiquitous to all dynamical systems in nature, such as physical, chemical, social, etc and are characterized by inverse power law form for power (eddy energy) spectrum signifying long-range space-time correlations. A general systems theory model for atmospheric flows developed by the author is based on the concept that the large eddy energy is the integrated mean of enclosed turbulent (small scale) eddies. This model gives scale-free universal governing equations for cloud growth processes. The model predicted cloud parameters are in agreement with reported observations, in particular, the cloud dropsize distribution. Rain formation can occur in warm clouds within 30minutes lifetime under favourable conditions of moisture supply in the environment.
Operator renewal theory and mixing rates for dynamical systems with infinite measure
Operator renewal theory and mixing rates for dynamical systems with infinite measure Ian Melbourne renewal sequences in the context of infinite ergodic theory. For large classes of dynamical systems technique, operator renewal theory, to obtain precise asymptotics and hence sharp mixing rates
THEORY OF DYNAMICAL SYSTEMS AND GENERAL TRANSFORMATION GROUPS WITH INVARIANT MEASURE
Katok, Svetlana
THEORY OF DYNAMICAL SYSTEMS AND GENERAL TRANSFORMATION GROUPS WITH INVARIANT MEASURE A. B. Katok, Ya. G. Sinai, and A. M. Stepin UDC 513.83:513.88+517.9+519.4 INTRODUCTION The theory of dynamical systems with invariant measure, or ergodic theory, is one of those domains of mathematics whose form
Complexity within the Air Force acquisition system gaining insight from a theory of collapse
Marticello, Daniel Nicholas, Jr
2012-01-01T23:59:59.000Z
Joseph Tainter's theory of societal collapse is applied in an examination of the U.S. Air Force's aircraft acquisition system in order to gain insight into the enterprise's lagging performance. Theories of collapse at both ...
Energy absorption by "sparse" systems: beyond linear response theory
Doron Cohen
2013-01-21T23:59:59.000Z
The analysis of the response to driving in the case of weakly chaotic or weakly interacting systems should go beyond linear response theory. Due to the "sparsity" of the perturbation matrix, a resistor network picture of transitions between energy levels is essential. The Kubo formula is modified, replacing the "algebraic" average over the squared matrix elements by a "resistor network" average. Consequently the response becomes semi-linear rather than linear. Some novel results have been obtained in the context of two prototype problems: the heating rate of particles in Billiards with vibrating walls; and the Ohmic Joule conductance of mesoscopic rings driven by electromotive force. Respectively, the obtained results are contrasted with the "Wall formula" and the "Drude formula".
Introduction to the basics of entanglement theory in continuous-variable systems
J. Eisert; M. B. Plenio
2003-12-15T23:59:59.000Z
We outline the basic questions that are being studied in the theory of entanglement. Following a brief review of some of the main achievements of entanglement theory for finite-dimensional quantum systems such as qubits, we will consider entanglement in infinite-dimensional systems. Asking for a theory of entanglement in such systems under experimentally feasible operations leads to the development of the theory of entanglement of Gaussian states. Results of this theory are presented and the tools that have been developed for it are applied to a number of problems.
Biochemical Conversion Pilot Plant (Fact Sheet)
Not Available
2012-06-01T23:59:59.000Z
This fact sheet provides information about Biochemical Conversion Pilot Plant capabilities and resources at NREL.
Operator renewal theory and mixing rates for dynamical systems with in nite measure
Operator renewal theory and mixing rates for dynamical systems with in#12;nite measure Ian of operator renewal sequences in the context of in#12;nite ergodic theory. For large classes of dynamical for mixing rates. Sarig [37] introduced a powerful new technique, operator renewal theory, to obtain precise
Automated Control Synthesis for an Assembly Line using Discrete Event System Control Theory
Kumar, Ratnesh
1 Automated Control Synthesis for an Assembly Line using Discrete Event System Control Theory even fail at times. Super- visory control theory (SCT) provides a formal approach to logic control synthesis. In order to demonstrate the useful- ness of the supervisory control theory in manufacturing sys
A stochastic perturbation theory for non-autonomous systems
Moon, W., E-mail: wm275@damtp.cam.ac.uk [Yale University, New Haven, Connecticut 06520-8109 (United States); Wettlaufer, J. S., E-mail: wettlaufer@maths.ox.ac.uk [Yale University, New Haven, Connecticut 06520-8109 (United States); Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom)
2013-12-15T23:59:59.000Z
We develop a perturbation theory for a class of first order nonlinear non-autonomous stochastic ordinary differential equations that arise in climate physics. The perturbative procedure produces moments in terms of integral delay equations, whose order by order decay is characterized in a Floquet-like sense. Both additive and multiplicative sources of noise are discussed and the question of how the nature of the noise influences the results is addressed theoretically and numerically. By invoking the Martingale property, we rationalize the transformation of the underlying Stratonovich form of the model to an Ito form, independent of whether the noise is additive or multiplicative. The generality of the analysis is demonstrated by developing it both for a Brownian particle moving in a periodically forced quartic potential, which acts as a simple model of stochastic resonance, as well as for our more complex climate physics model. The validity of the approach is shown by comparison with numerical solutions. The particular climate dynamics problem upon which we focus involves a low-order model for the evolution of Arctic sea ice under the influence of increasing greenhouse gas forcing ?F{sub 0}. The deterministic model, developed by Eisenman and Wettlaufer [“Nonlinear threshold behavior during the loss of Arctic sea ice,” Proc. Natl. Acad. Sci. U.S.A. 106(1), 28–32 (2009)] exhibits several transitions as ?F{sub 0} increases and the stochastic analysis is used to understand the manner in which noise influences these transitions and the stability of the system.
Technical Report 2009-003 A Testing Theory for Real-Time Systems
Technical Report 2009-003 A Testing Theory for Real-Time Systems Stefan D. Bruda and Chun Dai|cdai}@cs.ubishops.ca 30 October 2009 Abstract We develop a testing theory for real-time systems. We keep the usual notion or failure of infinite runs, using a formalism similar to the acceptance in B¨uchi automata. We present two
Few-Body Systems and the Pionless Effective Field Theory
Lucas Platter
2009-09-30T23:59:59.000Z
The pionless effective field theory (EFT) is the appropriate low-energy EFT for short-range interactions that display a large scattering length. It has been successfully applied in atomic, nuclear and particle physics. We give an overview over recent calculations employing the pionless effective field theory and lay emphasis on applications in the three- and four-body sector where the most exciting developments have occurred.
Multiple capillary biochemical analyzer
Dovichi, Norman J. (Edmonton, CA); Zhang, Jian Z. (Edmonton, CA)
1995-01-01T23:59:59.000Z
A multiple capillary analyzer allows detection of light from multiple capillaries with a reduced number of interfaces through which light must pass in detecting light emitted from a sample being analyzed, using a modified sheath flow cuvette. A linear or rectangular array of capillaries is introduced into a rectangular flow chamber. Sheath fluid draws individual sample streams through the cuvette. The capillaries are closely and evenly spaced and held by a transparent retainer in a fixed position in relation to an optical detection system. Collimated sample excitation radiation is applied simultaneously across the ends of the capillaries in the retainer. Light emitted from the excited sample is detected by the optical detection system. The retainer is provided by a transparent chamber having inward slanting end walls. The capillaries are wedged into the chamber. One sideways dimension of the chamber is equal to the diameter of the capillaries and one end to end dimension varies from, at the top of the chamber, slightly greater than the sum of the diameters of the capillaries to, at the bottom of the chamber, slightly smaller than the sum of the diameters of the capillaries. The optical system utilizes optic fibres to deliver light to individual photodetectors, one for each capillary tube. A filter or wavelength division demultiplexer may be used for isolating fluorescence at particular bands.
Multiple capillary biochemical analyzer
Dovichi, N.J.; Zhang, J.Z.
1995-08-08T23:59:59.000Z
A multiple capillary analyzer allows detection of light from multiple capillaries with a reduced number of interfaces through which light must pass in detecting light emitted from a sample being analyzed, using a modified sheath flow cuvette. A linear or rectangular array of capillaries is introduced into a rectangular flow chamber. Sheath fluid draws individual sample streams through the cuvette. The capillaries are closely and evenly spaced and held by a transparent retainer in a fixed position in relation to an optical detection system. Collimated sample excitation radiation is applied simultaneously across the ends of the capillaries in the retainer. Light emitted from the excited sample is detected by the optical detection system. The retainer is provided by a transparent chamber having inward slanting end walls. The capillaries are wedged into the chamber. One sideways dimension of the chamber is equal to the diameter of the capillaries and one end to end dimension varies from, at the top of the chamber, slightly greater than the sum of the diameters of the capillaries to, at the bottom of the chamber, slightly smaller than the sum of the diameters of the capillaries. The optical system utilizes optic fibers to deliver light to individual photodetectors, one for each capillary tube. A filter or wavelength division demultiplexer may be used for isolating fluorescence at particular bands. 21 figs.
Theory for the optimal control of time-averaged quantities in open quantum systems
Ilia Grigorenko; Martin E. Garcia; K. H. Bennemann
2002-03-25T23:59:59.000Z
We present variational theory for optimal control over a finite time interval in quantum systems with relaxation. The corresponding Euler-Lagrange equations determining the optimal control field are derived. In our theory the optimal control field fulfills a high order differential equation, which we solve analytically for some limiting cases. We determine quantitatively how relaxation effects limit the control of the system. The theory is applied to open two level quantum systems. An approximate analytical solution for the level occupations in terms of the applied fields is presented. Different other applications are discussed.
Financing Advanced Biofuels, Biochemicals And Biopower In Integrated...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Financing Advanced Biofuels, Biochemicals And Biopower In Integrated Biorefineries Financing Advanced Biofuels, Biochemicals And Biopower In Integrated Biorefineries Afternoon...
Statistical mechanical theory for steady state systems. VI. Variational principles
Attard, Phil
production due to Prigogine Introduction to Thermodynamics of Irreversible Processes Interscience, New York, 1967 , the principle of maximum rate of entropy production, which is common on the internet and statistical mechanics. It continues a series15 on nonequilibrium theory, the culmination of which
On a Theory of Precise Neural Control in a Noisy System
Waxman, David
On a Theory of Precise Neural Control in a Noisy System Wenlian Lu, Shun-ichi Amari, Jianfeng Feng, and David Waxman Abstract In this paper, we introduce a novel computational paradigm based on modern control and optimization theory and biological observations. We investigate the `minimum-variance principle
Rudenko, Yu.N.; Ushakov, I.A.
1984-01-01T23:59:59.000Z
Certain features of mathematical models of energy-system reliability are analyzed. Mathematical models employed in reliability theory for technical systems are considered together with the possibility of modifying them for use in the solution of problems associated with ensuring the reliability of energy systems.
Huang, Yi-Zhi
Quantum Hall systems Representation theory of vertex operator algebras Applications The end Quantum;Quantum Hall systems Representation theory of vertex operator algebras Applications The end Outline 1 An approach to a fundamental conjecture #12;Quantum Hall systems Representation theory of vertex operator
Huang, Yi-Zhi
Quantum Hall systems Representation theory of vertex operator algebras Applications The end Quantum Science, CAS #12;Quantum Hall systems Representation theory of vertex operator algebras Applications to a fundamental conjecture #12;Quantum Hall systems Representation theory of vertex operator algebras Applications
A Hamilton-Jacobi Theory for Singular Lagrangian Systems in the Skinner and Rusk Setting
Manuel de León; David Martín de Diego; Miguel Vaquero
2012-05-01T23:59:59.000Z
We develop a Hamilton-Jacobi theory for singular lagrangian systems in the Skinner-Rusk formalism. Comparisons with the Hamilton-Jacobi problem in the lagrangian and hamiltonian settings are discussed.
System Reliability: A Case When Fuzzy Logic Enhances Probability Theory's Ability
Kreinovich, Vladik
. Zadeh explains that probabil ity theory needs an infusion of fuzzy logic to enhance its ability to deal such an infusion is indeed successful: the problem of system reliability. 1. Reliability: Brief Introduction
Solar System Constraints on a Cosmologically Viable $f(R)$ Theory
Yousef Bisabr
2009-12-02T23:59:59.000Z
Recently, a model $f(R)$ theory is proposed \\cite{recent} which is cosmologically viable and distinguishable from $\\Lambda$CDM. We use chameleon mechanism to investigate viability of the model in terms of Solar System experiments.
Statistical Mechanics of Ecological Systems: Neutral Theory and Beyond
Azaele, Sandro; Grilli, Jacopo; Volkov, Igor; Banavar, Jayanth R; Maritan, Amos
2015-01-01T23:59:59.000Z
The simplest theories often have much merit and many limitations, and in this vein, the value of Neutral Theory (NT) has been the subject of much debate over the past 15 years. NT was proposed at the turn of the century by Stephen Hubbell to explain pervasive patterns observed in the organization of ecosystems. Its originally tepid reception among ecologists contrasted starkly with the excitement it caused among physicists and mathematicians. Indeed, NT spawned several theoretical studies that attempted to explain empirical data and predicted trends of quantities that had not yet been studied. While there are a few reviews of NT oriented towards ecologists, our goal here is to review the quantitative results of NT and its extensions for physicists who are interested in learning what NT is, what its successes are and what important problems remain unresolved. Furthermore, we hope that this review could also be of interest to theoretical ecologists because many potentially interesting results are buried in the ...
Harel, David
Symbolic Systems Biology: Theory and Methods, Jones and Bartlett Publishers 2010 On Statecharts for Biology Jasmin Fisher and David Harel Biology as Reactivity One of the central issues in software decade or so, we and others have carried out work on viewing biological systems as reactive systems
MINIMAL AND MAXIMAL OPERATOR SPACES AND OPERATOR SYSTEMS IN ENTANGLEMENT THEORY
Paulsen, Vern
MINIMAL AND MAXIMAL OPERATOR SPACES AND OPERATOR SYSTEMS IN ENTANGLEMENT THEORY NATHANIEL JOHNSTON-maximal operator spaces and operator systems, and investigate their relationships with the basic separability operator systems that were recently introduced and show that their cones of positive elements are exactly
Portfolio Theory-Based Resource Assignment in a Cloud Computing System
Pedram, Massoud
management in cloud computing systems. Considering that much of the time, server machines in a data centerPortfolio Theory-Based Resource Assignment in a Cloud Computing System Inkwon Hwang and Massoud-- The focus of this paper is on energy-aware resource management in a cloud computing system. Much
Hierarchic Theory of Complex Systems (biosystems, colloids): self-organization & osmos
Alex Kaivarainen
2000-03-24T23:59:59.000Z
1. Protein domain mesoscopic organization 2. Quantum background of lipid domain organization in biomembranes 3. Hierarchic approach to theory of solutions and colloid systems 4. Distant solvent-mediated interaction between macromolecules 5. Spatial self-organization in the water-macromolecular systems 6. Properties of [bisolvent - polymer system] 7. Osmosis and solvent activity. Traditional and mesoscopic approach
A Practical Theory of Micro-Solar Power Sensor Networks JAEIN JEONG, Cisco Systems
California at Berkeley, University of
9 A Practical Theory of Micro-Solar Power Sensor Networks JAEIN JEONG, Cisco Systems DAVID CULLER, University of California, Berkeley Building a micro-solar power system is challenging because it must address long-term system behavior under highly variable solar energy and consider a large design space. We
A modular microfluidic architecture for integrated biochemical analysis
Barron, Annelise E.
A modular microfluidic architecture for integrated biochemical analysis Kashan A. Shaikh*, Kee Suk for review November 15, 2004) Microfluidic laboratory-on-a-chip (LOC) systems based on a mod- ular (lead) at a sensitivity of 500 nM in microfluidic breadboard
Algebraic theory of type-and-effect systems
Kammar, Ohad
2014-06-27T23:59:59.000Z
We present a general semantic account of Gifford-style type-and-effect systems. These type systems provide lightweight static analyses annotating program phrases with the sets of possible computational effects they may ...
Exterior Differential Systems for Yang-Mills Theories
Frank B. Estabrook
2008-12-05T23:59:59.000Z
Exterior differential systems are given, and their Cartan characters calculated, for Maxwell and SU(2)-Yang-Mills equations in dimensions from three to six.
Theory and Practice of Enhancing a Legacy Software System
Calder, M.
Calder,M. Magill,E. Reiff-Marganiec,S. Thayananthan,V. Systems Engineering for Business Process Change (volume 2), P.Henderson (ed.) Springer
L. I. Petrova
2008-12-02T23:59:59.000Z
Historically it happen so that in branches of physics connected with field theory and of physics of material systems (continuous media) the concept of "conservation laws" has a different meaning. In field theory "conservation laws" are those that claim the existence of conservative physical quantities or objects. These are conservation laws for physical fields. In contrast to that in physics (and mechanics) of material systems the concept of "conservation laws" relates to conservation laws for energy, linear momentum, angular momentum, and mass that establish the balance between the change of physical quantities and external action. In the paper presented it is proved that there exist a connection between of conservation laws for physical fields and those for material systems. This points to the fact that physical fields are connected with material systems. Such results has an unique significance for field theories. This enables one to substantiate many basic principles of field theories, such as, for example, the unity of existing field theories and the causality. The specific feature of field theory equations, namely, their connection to the equations for material systems, is elicited. Such results have been obtained by using skew-symmetric differential forms, which reflect the properties of conservation laws.
Pionless Effective Field Theory in Few-Nucleon Systems
Kirscher, Johannes
2015-01-01T23:59:59.000Z
A systematic description of low-energy observables in light nuclei is presented. The effective field theory formalism without pions is extended to: i) predictions with next-to-leading-order (non-perturbatively) accuracy for the 4-helium binding energy B({\\alpha}), the triton charge radius, and the 3-helium-neutron scattering length; ii) phase shifts for neutron-deuteron scattering and {\\alpha}-neutron low-energy scattering at leading order; iii) the ground states of the 5-helium (with and without Coulomb interaction) and 6-helium isotopes up to next-to-leading order; The convergence from leading- to next-to-leading order of the theory is demonstrated for correlations between: i) the triton binding energy B(t) and the triton charge radius; ii) B(t) and the 4-helium binding energy B({\\alpha}); Furthermore, a correlation between B(t) and the scattering length in the singlet S-wave channel of neutron-helium-3 scattering is discovered, and a model-independent estimate for the trinucleon binding energy splitting is...
Geometrical Hyperbolic Systems for General Relativity and Gauge Theories
A. Abrahams; A. Anderson; Y. Choquet-Bruhat; J. W. York Jr
1996-05-08T23:59:59.000Z
The evolution equations of Einstein's theory and of Maxwell's theory---the latter used as a simple model to illustrate the former--- are written in gauge covariant first order symmetric hyperbolic form with only physically natural characteristic directions and speeds for the dynamical variables. Quantities representing gauge degrees of freedom [the spatial shift vector $\\beta^{i}(t,x^{j})$ and the spatial scalar potential $\\phi(t,x^{j})$, respectively] are not among the dynamical variables: the gauge and the physical quantities in the evolution equations are effectively decoupled. For example, the gauge quantities could be obtained as functions of $(t,x^{j})$ from subsidiary equations that are not part of the evolution equations. Propagation of certain (``radiative'') dynamical variables along the physical light cone is gauge invariant while the remaining dynamical variables are dragged along the axes orthogonal to the spacelike time slices by the propagating variables. We obtain these results by $(1)$ taking a further time derivative of the equation of motion of the canonical momentum, and $(2)$ adding a covariant spatial derivative of the momentum constraints of general relativity (Lagrange multiplier $\\beta^{i}$) or of the Gauss's law constraint of electromagnetism (Lagrange multiplier $\\phi$). General relativity also requires a harmonic time slicing condition or a specific generalization of it that brings in the Hamiltonian constraint when we pass to first order symmetric form. The dynamically propagating gravity fields straightforwardly determine the ``electric'' or ``tidal'' parts of the Riemann tensor.
Coherent versus measurement feedback: Linear systems theory for quantum information
Naoki Yamamoto
2014-10-10T23:59:59.000Z
To control a quantum system via feedback, we generally have two options in choosing control scheme. One is the coherent feedback, which feeds the output field of the system, through a fully quantum device, back to manipulate the system without involving any measurement process. The other one is the measurement-based feedback, which measures the output field and performs a real-time manipulation on the system based on the measurement results. Both schemes have advantages/disadvantages, depending on the system and the control goal, hence their comparison in several situation is important. This paper considers a general open linear quantum system with the following specific control goals; back-action evasion (BAE), generation of a quantum non-demolished (QND) variable, and generation of a decoherence-free subsystem (DFS), all of which have important roles in quantum information science. Then some no-go theorems are proven, clarifying that those goals cannot be achieved by any measurement-based feedback control. On the other hand it is shown that, for each control goal, there exists a coherent feedback controller accomplishing the task. The key idea to obtain all the results is system theoretic characterizations of BAE, QND, and DFS in terms of controllability and observability properties or transfer functions of linear systems, which are consistent with their standard definitions.
Nottale, Laurent
2008-01-01T23:59:59.000Z
Progress in Biophysics and Molecular Biology 97 (2008) 115157 Review Scale relativity theory and integrative systems biology: 2 Macroscopic quantum-type mechanics Laurent Nottalea,b , Charles Auffrayb Meudon, France b Functional Genomics and Systems Biology for Health, UMR 7091-LGN, CNRS/Pierre & Marie
Two definitions of the electric polarizability of a bound system in relativistic quantum theory
F. A. B. Coutinho; Y. Nogami; Lauro Tomio
1998-12-24T23:59:59.000Z
For the electric polarizability of a bound system in relativistic quantum theory, there are two definitions that have appeared in the literature. They differ depending on whether or not the vacuum background is included in the system. A recent confusion in this connection is clarified.
Malicious Code Execution Detection and Response Immune System inpired by the Danger Theory
Aickelin, Uwe
Malicious Code Execution Detection and Response Immune System inpired by the Danger Theory Jungwon an artificial immune system. A recently developed hypothesis in immunology, the Danger The- ory, states that our invaders, plus signals generated by the host indic- ating danger and damage. We propose the incorporation
Particle transport in low-energy ventilation systems. Part 1: theory of steady states
Bolster, Diogo
, such as that pro- vided by a conventional overhead heating, ventilating and air-conditioning system, is mixingParticle transport in low-energy ventilation systems. Part 1: theory of steady states Introduction of this energy is spent on ventilation of buildings with summer time cooling account for almost 10% of the US
Towards the theory of control in observable quantum systems
V P Belavkin
2004-08-02T23:59:59.000Z
An operational description of the controlled Markov dynamics of quantum-mechanical system is introduced. The feedback control strategies with regard to the dynamical reduction of quantum states in the course of quantum real-time measurements are discribed in terms of quantum filtering of these states. The concept of sufficient coordinates for the description of the a posteriori quantum states from a given class is introduced, and it is proved that they form a classical Markov process with values in either state operators or state vector space. The general problem of optimal control of a quantum-mechanical system is discussed and the corresponding Bellman equation in the space of sufficient coordinates is derived. The results are illustrated in the example of control of the semigroup dynamics of a quantum system that is instantaneously observed at discrete times and evolves between measurement times according to the Schroedinger equation.
Stochastic Fluid Theory for P2P Streaming Systems
Liu, Yong
demand for content, peer churn (peers joining and leaving), peers with heterogeneous upload capacity small systems since they are more resilient to bandwidth fluctuations caused by peer churn. Finally-level) multicast tree - a characteristic particularly desirable for the highly dynamic, high-churn P2P environment
Kinetic theory of a longitudinally expanding system of scalar particles
Thomas Epelbaum; Francois Gelis; Sangyong Jeon; Guy Moore; Bin Wu
2015-06-29T23:59:59.000Z
A simple kinematical argument suggests that the classical approximation may be inadequate to describe the evolution of a system with an anisotropic particle distribution. In order to verify this quantitatively, we study the Boltzmann equation for a longitudinally expanding system of scalar particles interacting with a $\\phi^4$ coupling, that mimics the kinematics of a heavy ion collision at very high energy. We consider only elastic $2\\to 2$ scatterings, and we allow the formation of a Bose-Einstein condensate in overpopulated situations by solving the coupled equations for the particle distribution and the particle density in the zero mode. For generic CGC-like initial conditions with a large occupation number and a moderate coupling, the solutions of the full Boltzmann equation do not follow a classical attractor behavior.
Hamilton-Jacobi Theory for Degenerate Lagrangian Systems with Holonomic and Nonholonomic Constraints
Melvin Leok; Tomoki Ohsawa; Diana Sosa
2012-09-12T23:59:59.000Z
We extend Hamilton-Jacobi theory to Lagrange-Dirac (or implicit Lagrangian) systems, a generalized formulation of Lagrangian mechanics that can incorporate degenerate Lagrangians as well as holonomic and nonholonomic constraints. We refer to the generalized Hamilton-Jacobi equation as the Dirac-Hamilton-Jacobi equation. For non-degenerate Lagrangian systems with nonholonomic constraints, the theory specializes to the recently developed nonholonomic Hamilton-Jacobi theory. We are particularly interested in applications to a certain class of degenerate nonholonomic Lagrangian systems with symmetries, which we refer to as weakly degenerate Chaplygin systems, that arise as simplified models of nonholonomic mechanical systems; these systems are shown to reduce to non-degenerate almost Hamiltonian systems, i.e., generalized Hamiltonian systems defined with non-closed two-forms. Accordingly, the Dirac-Hamilton-Jacobi equation reduces to a variant of the nonholonomic Hamilton-Jacobi equation associated with the reduced system. We illustrate through a few examples how the Dirac-Hamilton-Jacobi equation can be used to exactly integrate the equations of motion.
Biochemical transformation of solid carbonaceous material
Lin, Mow S. (Rocky Point, NY); Premuzic, Eugene T. (East Moriches, NY)
2001-09-25T23:59:59.000Z
A method of biochemically transforming macromolecular compounds found in solid carbonaceous materials, such as coal is provided. The preparation of new microorganisms, metabolically weaned through challenge growth processes to biochemically transform solid carbonaceous materials at extreme temperatures, pressures, pH, salt and toxic metal concentrations is also disclosed.
Integrating Random Matrix Theory Predictions with Short-Time Dynamical Effects in Chaotic Systems
A. Matthew Smith; Lev Kaplan
2010-06-29T23:59:59.000Z
We discuss a modification to Random Matrix Theory eigenstate statistics, that systematically takes into account the non-universal short-time behavior of chaotic systems. The method avoids diagonalization of the Hamiltonian, instead requiring only a knowledge of short-time dynamics for a chaotic system or ensemble of similar systems. Standard Random Matrix Theory and semiclassical predictions are recovered in the limits of zero Ehrenfest time and infinite Heisenberg time, respectively. As examples, we discuss wave function autocorrelations and cross-correlations, and show that significant improvement in accuracy is obtained for simple chaotic systems where comparison can be made with brute-force diagonalization. The accuracy of the method persists even when the short-time dynamics of the system or ensemble is known only in a classical approximation. Further improvement in the rate of convergence is obtained when the method is combined with the correlation function bootstrapping approach introduced previously.
A probability theory for non-equilibrium gravitational systems
Peñarrubia, Jorge
2015-01-01T23:59:59.000Z
This paper uses dynamical invariants to describe the evolution of collisionless systems subject to time-dependent gravitational forces without resorting to maximum-entropy probabilities. We show that collisionless relaxation can be viewed as a special type of diffusion process in the integral-of-motion space. In time-varying potentials with a fixed spatial symmetry the diffusion coefficients are closely related to virial quantities, such as the specific moment of inertia, the virial factor and the mean kinetic and potential energy of microcanonical particle ensembles. The non-equilibrium distribution function (DF) is found by convolving the initial DF with the Green function that solves Einstein's equation for freely diffusing particles. Such a convolution also yields a natural solution to the Fokker-Planck equations in the energy space. Our mathematical formalism can be generalized to potentials with a time-varying symmetry, where diffusion extends over multiple dimensions of the integral-of-motion space. Th...
Fluid - solid transition in simple systems using density functional theory
Atul S. Bharadwaj; Yashwant Singh
2014-11-24T23:59:59.000Z
A free energy functional for a crystal proposed by Singh and Singh (Europhysics Letters \\textbf{88}, 16005 (2009)) which contains both the symmetry-conserved and symmetry-broken parts of the direct pair correlation function has been used to investigate the fluid-solid transition in systems interacting via purely repulsive WCA Lennard - Jones (RLJ) potential and the full Lennard - Jones (LJ) potential. The results found for freezing parameters for the fluid - face centred cubic (fcc) crystal transition are in very good agreement with simulation results. It is shown that although the contribution made by the symmetry broken part to the grand thermodynamic potential at the freezing point is small compared to that of the symmetry conserving part, its role is crucial in stabilizing the crystalline structure and on values of freezing parameters. The effect of attractive part of the LJ potential on the freezing parameters is found to be small, confirming the view that the fluid - solid transition is primarily determined by the repulsive part of the potential.
Stochastic chemical enrichment in metal-poor systems I. Theory
T. Karlsson
2005-04-27T23:59:59.000Z
A stochastic model of the chemical enrichment of metal-poor systems by core-collapse (Type II) supernovae is presented, allowing for large-scale mixing of the enriched material by turbulent motions and cloud collisions in the interstellar medium. Infall of pristine material is taken into account by following the evolution of the gas density in the medium. Analytical expressions were derived for the number of stars enriched by a given number of supernovae, as well as for the amount of mass with which the ejected material from a supernova is mixed before being locked up in a subsequently formed star. It is shown that for reasonable values of the gas density (~0.1 cm-3) and of the supernova rate (~0.25 kpc-3 Myr-1) of the Galactic halo, the resulting metallicity distributions of the extreme Population II stars show a distinct cut-off at [Fe/H] ~= -4. In fact, by assuming no low-mass Population III stars were able to form out of the primordial interstellar medium, the derived fraction of stars below [Fe/H] = -4 is in agreement with observations. Moreover, the probability is high that even the most metal-poor stars observed to date have been enriched by several contributing supernovae. This partly explains the relatively small star-to-star scatter in many chemical-abundance ratios for stars down to [Fe/H] = -4, as recently found in several observational studies. Contribution from the thermonuclear (Type Ia) supernovae is found to be negligible over almost the entire extremely metal-poor regime. (***abridged***)
The free energy cost of accurate biochemical oscillations
Cao, Yuansheng; Ouyang, Qi; Tu, Yuhai
2015-01-01T23:59:59.000Z
Oscillation is an important cellular process that regulates timing of different vital life cycles. However, in the noisy cellular environment, oscillations can be highly inaccurate due to phase fluctuations. It remains poorly understood how biochemical circuits suppress phase fluctuations and what is the incurred thermodynamic cost. Here, we study four different types of biochemical oscillations representing three basic oscillation motifs shared by all known oscillatory systems. We find that the phase diffusion constant follows the same inverse dependence on the free energy dissipation per period for all systems studied. This relationship between the phase diffusion and energy dissipation is shown analytically in a model of noisy oscillation. Microscopically, we find that the oscillation is driven by multiple irreversible cycles that hydrolyze the fuel molecules such as ATP; the number of phase coherent periods is proportional to the free energy consumed per period. Experimental evidence in support of this un...
Qu, Zhihua
. Controllers designed using modern state-space theory have been serving power systems for decades power system excitation control design via theories of feedback linearization control and nonlinear robust control DEQIANG GAN{, ZHIHUA QU{ and HONGZHI CAI{ The dynamics of a large-scale power system
2015 Peer Review Presentations-Biochemical Conversion | Department...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Biochemical Conversion 2015 Peer Review Presentations-Biochemical Conversion The Bioenergy Technologies Office hosted its 2015 Project Peer Review on March 23-27, 2015, at the...
2011 Biomass Program Platform Peer Review: Biochemical Conversion...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Biochemical Conversion 2011 Biomass Program Platform Peer Review: Biochemical Conversion This document summarizes the recommendations and evaluations provided by an independent...
Biochemical Production of Ethanol from Corn Stover: 2007 State...
Biochemical Production of Ethanol from Corn Stover: 2007 State of Technology Model Biochemical Production of Ethanol from Corn Stover: 2007 State of Technology Model An update to...
Optimizing the Energy Delivery via V2G Systems based on Stochastic Inventory Theory
Zhuang, Weihua
1 Optimizing the Energy Delivery via V2G Systems based on Stochastic Inventory Theory Hao Liang, Fellow, IEEE Abstract--In this paper, we study the optimal energy delivery problem from viewpoints formulate the optimization problem based on a general plug- in hybrid electric vehicle (PHEV) model, taking
Excitable systems with noise and delay with applications to control: renewal theory approach
Andrey Pototsky; Natalia Janson
2007-12-03T23:59:59.000Z
We present an approach for the analytical treatment of excitable systems with noise-induced dynamics in the presence of time delay. An excitable system is modeled as a bistable system with a time delay, while another delay enters as a control term taken after [Pyragas 1992] as a difference between the current system state and its state "tau" time units before. This approach combines the elements of renewal theory to estimate the essential features of the resulting stochastic process as functions of the parameters of the controlling term.
Existence of radial stationary solutions for a system in combustion theory
Coville, Jerome; 10.3934/dcdsb.2011.16.xx
2011-01-01T23:59:59.000Z
In this paper, we construct radially symmetric solutions of a nonlinear noncooperative elliptic system derived from a model for flame balls with radiation losses. This model is based on a one step kinetic reaction and our system is obtained by approximating the standard Arrehnius law by an ignition nonlinearity, and by simplifying the term that models radiation. We prove the existence of 2 solutions using degree theory.
Design guidelines for optical resonator biochemical sensors
Kimerling, Lionel C.
In this paper, we propose a design tool for dielectric optical resonator-based biochemical refractometry sensors. Analogous to the widely accepted photodetector figure of merit, the detectivity D*, we introduce a new sensor ...
On the use of the theory of dynamical systems for transient problems
Ugo Galvanetto; Luca Magri
2014-11-01T23:59:59.000Z
This paper is a preliminary work to address the problem of dynamical systems with parameters varying in time. An idea to predict their behaviour is proposed. These systems are called \\emph{transient systems}, and are distinguished from \\emph{steady systems}, in which parameters are constant. In particular, in steady systems the excitation is either constant (e.g. nought) or periodic with amplitude, frequency and phase angle which do not vary in time. We apply our method to systems which are subjected to a transient excitation, which is neither constant nor periodic. The effect of switching-off and full-transient forces is investigated. The former can be representative of switching-off procedures in machines; the latter can represent earthquake vibrations, wind gusts, etc. acting on a mechanical system. This class of transient systems can be seen as the evolution of an ordinary steady system into another ordinary steady system, for both of which the classical theory of dynamical systems holds. The evolution from a steady system to the other is driven by a transient force, which is regarded as a map between the two steady systems.
Kovalev, Alexey A.; Tserkovnyak, Yaroslav; Vyborny, Karel; Sinova, Jairo.
2009-01-01T23:59:59.000Z
Transport theory for disordered multiple-band systems: Anomalous Hall effect and anisotropic magnetoresistance Alexey A. Kovalev,1,2 Yaroslav Tserkovnyak,1 Karel V?born?,3 and Jairo Sinova2,3 1Department of Physics and Astronomy, University... of California, Los Angeles, California 90095, USA 2Department of Physics, Texas A&M University, College Station, Texas 77843-4242, USA 3Institute of Physics, ASCR, Cukrovarnick? 10, 162 53 Praha 6, Czech Republic #1;Received 16 February 2009; revised...
Theory of competition between fusion and quasi-fission in a heavy fusing system
Alexis Diaz-Torres
2006-04-05T23:59:59.000Z
A theory of the competition between fusion and quasi-fission in a heavy fusing system is proposed, which is based on a master equation and the two-center shell model. Fusion and quasi-fission arise from a diffusion process in an ensemble of nuclear shapes, each of which evolves towards the thermal equilibrium. The master equation describes the diffusion of the nuclear shapes due to quantum and thermal fluctuations. Other crucial physical effects like dissipation, ground-state shell effects, diabatic effects and rotational effects are also incorporated into the theory. The fusing system moves in a dynamical (time-dependent) collective potential energy surface which is initially diabatic and gradually becomes adiabatic. The microscopic ingredients of the theory are obtained with a realistic two-center shell model based on Woods-Saxon potentials. Numerical calculations for several reactions leading to $^{256}$No are discussed. Among other important conclusions, the results indicate that (i) the diabatic effects play a very important role in the onset of fusion hindrance for heavy systems, and (ii) very asymmetric reactions induced by closed shell nuclei seem to be the best suited to synthesize the heaviest compound nuclei.
Gegg, Brandon C.
2010-07-14T23:59:59.000Z
-cutting and chip seizure motions are defined. The interruption of the chip flow for a machining system will be investigated through a range of system parameters. The prediction of interrupted periodic cutting, non-cutting and chip seizure motion will be completed...
On the Foundations of the Theory of a new Collatz Based Number System
Michael A. Idowu
2015-03-18T23:59:59.000Z
Set out here are some fundamental theories that may be regarded as newly discovered metamathematics of the odd integers in relation to the Collatz conjecture (also called the 3x+1 problem). Originally motivated by the requirement to invent a new optimised integer factorisation method, this foundational paper primarily focuses on the foundation, formalisation and presentation of a new theoretical framework (schema or blueprint) of a Collatz based number system. The proposed framework is based on metamathematical theories meticulously derived through iterative analyses and reverse engineering (i.e., by hand and mathematical computations) of many large subsets of integers. A collation of the fundamental results from these analytical attempts has led to the establishment of a completely deterministic model of a generalised Collatz based number system that is fundamentally and strangely associated with nonchaotic patterns. The proposed Collatz based number schema comprises of both visual and theoretical representations of many hidden patterns in Collatz sequences yet to be reported in literature. This novel theoretical approach may be viewed as a new method to contemporary Collatz conjecture research which may be connected to the proofs of many other mathematical theorems in number theory and discrete mathematics.
Statistical mechanical theory for steady-state systems. III. Heat flow in a Lennard-Jones fluid
Attard, Phil
Statistical mechanical theory for steady-state systems. III. Heat flow in a Lennard-Jones fluid March 2005; accepted 4 May 2005; published online 28 June 2005 A statistical mechanical theory for heat distribution for heat flow down an imposed thermal gradient is tested with simulations of a Lennard-Jones fluid
Eclipsing binary systems as tests of low-mass stellar evolution theory
Feiden, Gregory A
2015-01-01T23:59:59.000Z
Stellar fundamental properties (masses, radii, effective temperatures) can be extracted from observations of eclipsing binary systems with remarkable precision, often better than 2%. Such precise measurements afford us the opportunity to confront the validity of basic predictions of stellar evolution theory, such as the mass-radius relationship. A brief historical overview of confrontations between stellar models and data from eclipsing binaries is given, highlighting key results and physical insight that have led directly to our present understanding. The current paradigm that standard stellar evolution theory is insufficient to describe the most basic relation, that of a star's mass to its radius, along the main sequence is then described. Departures of theoretical expectations from empirical data, however, provide a rich opportunity to explore various physical solutions, improving our understanding of important stellar astrophysical processes.
Duality and Modularity in Elliptic Integrable Systems and Vacua of N=1* Gauge Theories
Antoine Bourget; Jan Troost
2015-04-09T23:59:59.000Z
We study complexified elliptic Calogero-Moser integrable systems. We determine the value of the potential at isolated extrema, as a function of the modular parameter of the torus on which the integrable system lives. We calculate the extrema for low rank B,C,D root systems using a mix of analytical and numerical tools. For so(5) we find convincing evidence that the extrema constitute a vector valued modular form for a congruence subgroup of the modular group. For so(7) and so(8), the extrema split into two sets. One set contains extrema that make up vector valued modular forms for congruence subgroups, and a second set contains extrema that exhibit monodromies around points in the interior of the fundamental domain. The former set can be described analytically, while for the latter, we provide an analytic value for the point of monodromy for so(8), as well as extensive numerical predictions for the Fourier coefficients of the extrema. Our results on the extrema provide a rationale for integrality properties observed in integrable models, and embed these into the theory of vector valued modular forms. Moreover, using the data we gather on the modularity of complexified integrable system extrema, we analyse the massive vacua of mass deformed N=4 supersymmetric Yang-Mills theories with low rank gauge group of type B,C and D. We map out their transformation properties under the infrared electric-magnetic duality group as well as under triality for N=1* with gauge algebra so(8). We find several intriguing properties of the quantum gauge theories.
Solar System planetary orbital motions and f(R) Theories of Gravity
Matteo Luca Ruggiero; Lorenzo Iorio
2006-12-14T23:59:59.000Z
In this paper we study the effects of $f(R)$ Theories of Gravity on Solar System gravitational tests. In particular, starting from an exact solution of the field equation in vacuum, in the Palatini formalism, we work out the effects that the modifications to the Newtonian potential would induce on the Keplerian orbital elements of the Solar System planets, and compare them with the latest results in planetary orbit determination from the EPM2004 ephemerides. It turns out that the longitudes of perihelia and the mean longitudes are affected by secular precessions. We obtain the resulting best estimate of the parameter $k$ which, being simply related to the scalar curvature, measures the non linearity of the gravitational theory. We use our results to constrain the cosmological constant and show how $f(R)$ functions can be constrained, in principle. What we obtain suggests that, in agreement with other recent papers, the Solar System experiments are not effective to set such constraints, if compared to the cosmologically relevant values.
Omar Maj
2008-02-12T23:59:59.000Z
This is the second part of a work aimed to study complex-phase oscillatory solutions of nonlinear symmetric hyperbolic systems. We consider, in particular, the case of one space dimension. That is a remarkable case, since one can always satisfy the \\emph{naive} coherence condition on the complex phases, which is required in the construction of the approximate solution. Formally the theory applies also in several space dimensions, but the \\emph{naive} coherence condition appears to be too restrictive; the identification of the optimal coherence condition is still an open problem.
Tuning Range-Separated Density Functional Theory for Photocatalytic Water Splitting Systems
Bokareva, Olga S; Bokarev, Sergey I; Kühn, Oliver
2015-01-01T23:59:59.000Z
We discuss the applicability of long-range separated density functional theory (DFT) to the prediction of electronic transitions of a particular photocatalytic system based on an Ir(III) photosensitizer (IrPS). Special attention is paid to the charge-transfer properties which are of key importance for the photoexcitation dynamics, but and cannot be correctly described by means of conventional DFT. The optimization of the range-separation parameter is discussed for IrPS including its complexes with electron donors and acceptors used in photocatalysis. Particular attention is paid to the problems arising for a description of medium effects by a polarizable continuum model.
Kristin Ducrest Biochem 118-OSP Paris
Brutlag, Doug
Kristin Ducrest Biochem 118-OSP Paris Professor Doug Brutlag 11-15-02 Tackling Parkinson Disease with Bioinformatics and Genomics Parkinson disease (PD) is a neurodegenerative disease characterized most commonly to the genetics beneath the manifestation of the disease, the inheritance pattern of PD has been a subject
Clinical Biochemical Geneticist Two-Year Fellowship
Finley Jr., Russell L.
Clinical Biochemical Geneticist Two-Year Fellowship YEAR 1 YEAR 2 MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY A.M. Lab Research & Clinical Training Lab Research & Clinical Training Lab Research & Clinical Training 8AM Newborn Screen Follow-up conference Lab Research & Clinical Training Lab Research & Clinical
ORAL QUAL SYLLABUS: SET THEORY; ERGODIC THEORY
ORAL QUAL SYLLABUS: SET THEORY; ERGODIC THEORY SAMUEL COSKEY Set Theory. #15; Basic set theory's theorem { there exists an Aronsajn tree { Shanin's root system lemma (#2;2) #15; Descriptive set theory of set theory (Jech 12,13) { Mostowski's collapsing theorem { relativization and absolute formulas { re
Friedman, Eby G.
, and soft- ware implementation of this repeater insertion system are presented in this paper. Results fromIEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 47, NO. 10 these insertion methodologies improve delay from 25% to 60% versus typical cascaded buffer methodologies. Global
Fattebert, J; Law, R J; Bennion, B; Lau, E Y; Schwegler, E; Lightstone, F C
2009-04-24T23:59:59.000Z
We evaluate the accuracy of density functional theory quantum calculations of biomolecular subsystems using a simple electrostatic embedding scheme. Our scheme is based on dividing the system of interest into a primary and secondary subsystem. A finite difference discretization of the Kohn-Sham equations is used for the primary subsystem, while its electrostatic environment is modeled with a simple one-electron potential. Force-field atomic partial charges are used to generate smeared Gaussian charge densities and to model the secondary subsystem. We illustrate the utility of this approach with calculations of truncated dipeptide chains. We analyze quantitatively the accuracy of this approach by calculating atomic forces and comparing results with fullQMcalculations. The impact of the choice made in terminating dangling bonds at the frontier of the QM region is also investigated.
Clausen, Alison, E-mail: aliclausen@protocol.com.a [WWF Madagascar and Western Indian Ocean Programme Office, BP 738, Antananarivo 101 (Madagascar); Vu, Hoang Hoa, E-mail: hoanghoavu@yahoo.co [Water Resources University, Hanoi (Viet Nam); Pedrono, Miguel, E-mail: pedrono@cirad.f [CIRAD, Campus International de Baillarguet, 34398 Montpellier Cedex 5 (France)
2011-03-15T23:59:59.000Z
Vietnam has one of the fastest growing economies in the world and has achieved significant socio-economic development in recent years. However this growth is placing increased pressure on an already depleted natural environment. Environmental impact assessment (EIA) is recognised by the Government and international organizations as an important tool in the management of the impacts of future development on the country's natural resource base. The Government's commitment to EIA has been demonstrated through the development and adoption of the Law on Environment Protection (Revised) in 2005 which sets out the requirements for EIA and which represents a major step in the development of a robust legislative framework for EIA in Vietnam. The Law on Environment Protection (Revised) 2005 has now been operational for several years and we have undertaken an evaluation of the resulting EIA system in Vietnam. We argue that while significant improvements have been achieved in the EIA policy framework, an important gap remains between EIA theory and practice. We contend that the basis of the current EIA legislation is strong and that future developments of the EIA system in Vietnam should focus on improving capacity of EIA practitioners rather than further substantial legislative change. Such improvements would allow the Vietnamese EIA system to emerge as an effective and efficient tool for environmental management in Vietnam and as a model EIA framework for other developing countries.
A General Systems Theory for Atmospheric Flows and Atmospheric Aerosol Size Distribution
A. M. Selvam
2011-07-25T23:59:59.000Z
Atmospheric flows exhibit selfsimilar fractal spacetime fluctuations manifested as the fractal geometry to global cloud cover pattern and inverse power law form for power spectra of meteorological parameters such as windspeed, temperature, rainfall etc. Inverse power law form for power spectra indicate long-range spacetime correlations or non-local connections and is a signature of selforganised criticality generic to dynamical systems in nature such as river flows, population dynamics, heart beat patterns etc. The author has developed a general systems theory which predicts the observed selforganised criticality as a signature of quantumlike chaos in dynamical systems. The model predictions are (i) The fractal fluctuations can be resolved into an overall logarithmic spiral trajectory with the quasiperiodic Penrose tiling pattern for the internal structure. (ii) The probability distribution represents the power (variance) spectrum for fractal fluctuations and follows universal inverse power law form incorporating the golden mean. Such a result that the additive amplitudes of eddies when squared represent probability distribution is observed in the subatomic dynamics of quantum systems such as the electron or photon. Therefore the irregular or unpredictable fractal fluctuations exhibit quantumlike chaos. (iii) Atmospheric aerosols are held in suspension by the vertical velocity distribution (spectrum). The atmospheric aerosol size spectrum is derived in terms of the universal inverse power law characterizing atmospheric eddy energy spectrum. Model predicted spectrum is in agreement with the following two experimentally determined atmospheric aerosol data sets, (i) SAFARI 2000 CV-580 Aerosol Data, Dry Season 2000 (CARG) (ii) World Data Centre Aerosols data sets for the three stations Ny {\\AA}lesund, Pallas and Hohenpeissenberg.
How to reconcile Information theory and Gibbs-Herz entropy for inverted populated systems
Gagliardi, Alessio
2015-01-01T23:59:59.000Z
In this paper we discuss about the validity of the Shannon entropy functional in connection with the correct Gibbs-Hertz probability distribution function. We show that there is no contradiction in using the Shannon-Gibbs functional and restate the validity of information theory applied to equilibrium statistical mechanics. We show that under these assumptions, entropy is always a monotone function of energy, irrespective to the shape of the density of states, leading always to positive temperatures even in the case of inverted population systems. In the second part we assume the validity of the Shannon entropy and thermodynamic temperature, T=dE/dS, extended to systems under non-equilibrium steady state. Contrary to equilibrium, we discuss the possibility and meaning of a negative temperature in this case. Finally we discuss on Carnot cycles operating with a non-equilibrium bath possessing a negative temperature and leading to apparent efficiencies larger than one, due to a wrong accounting af all the energy...
Huangshi Xinghua Biochemical Ltd | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasmaP aCentrothermDepew, NewAl.,HardinHeliosHope, Alaska: EnergyHoward County,Huangshi Xinghua Biochemical
Biochemical processing of heavy oils and residuum
Lin, M.S.; Premuzic, T.; Yablon, J.H.; Zhou, Wei-Min
1995-05-01T23:59:59.000Z
During the past several decades, the petroleum industry has adjusted gradually to accommodate the changes in market product demands, government regulations, and the quality and cost of feedstock crude oils. For example, the trends show that the demand for distillate fuels, such as diesel, as compared to gasoline are increasing. Air-quality standards have put additional demand on the processing of heavier and higher sulfur feed stocks. Thus, the 1990 Clean Air Act amendments require the industry to produce greater quantities of oxygenated gasoline, and lower sulfur diesel and reformulated gasoline. Biochemical technology may play an important role in responding to these demands on the petroleum industry.
A decision support system prototype including human factors based on the TOGA meta-theory approach
Cappelli, M.; Memmi, F. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy); Gadomski, A. M. [ECONA, Centro Interuniv. Elaborazione Cognitiva Sistemi Naturali e Artificiali, via dei Marsi 47, Rome (Italy); Sepielli, M. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy)
2012-07-01T23:59:59.000Z
The human contribution to the risk of operation of complex technological systems is often not negligible and sometimes tends to become significant, as shown by many reports on incidents and accidents occurred in the past inside Nuclear Power Plants (NPPs). An error of a human operator of a NPP can derive by both omission and commission. For instance, complex commission errors can also lead to significant catastrophic technological accidents, as for the case of the Three Mile Island accident. Typically, the problem is analyzed by focusing on the single event chain that has provoked the incident or accident. What is needed is a general framework able to include as many parameters as possible, i.e. both technological and human factors. Such a general model could allow to envisage an omission or commission error before it can happen or, alternatively, suggest preferred actions to do in order to take countermeasures to neutralize the effect of the error before it becomes critical. In this paper, a preliminary Decision Support System (DSS) based on the so-called (-) TOGA meta-theory approach is presented. The application of such a theory to the management of nuclear power plants has been presented in the previous ICAPP 2011. Here, a human factor simulator prototype is proposed in order to include the effect of human errors in the decision path. The DSS has been developed using a TRIGA research reactor as reference plant, and implemented using the LabVIEW programming environment and the Finite State Machine (FSM) model The proposed DSS shows how to apply the Universal Reasoning Paradigm (URP) and the Universal Management Paradigm (UMP) to a real plant context. The DSS receives inputs from instrumentation data and gives as output a suggested decision. It is obtained as the result of an internal elaborating process based on a performance function. The latter, describes the degree of satisfaction and efficiency, which are dependent on the level of responsibility related to each professional role. As an application, we present the simulation of the discussed error, e.g. the unchecked extraction of the control rods during a power variation maneuver and we show how the effect of human errors can affect the performance function, giving rise to different countermeasures which could call different operator figures into play, potentially not envisaged in the standard procedure. (authors)
Kachroo, Pushkin
ECE 6444: Optimization Theory: Finite and Infinite Dimensional Systems Fall 2006, 3 credits, CRN and 00 )( xtx = are specified, ft and )( ftx are free. From this general result, show the necessary conditions, when (b) 0t and 00 )( xtx = are specified, ft and )( ftx are also specified (2 points) (c) 0t
Alberto Escalante
2006-07-13T23:59:59.000Z
Using a strongly covariant formalism given by Carter for the deformations dynamics of p-branes in a curved background and a covariant and gauge invariant geometric structure constructed on the corresponding Witten's phase space, we identify the canonical variables for Dirac-Nambu-Goto [DNG] and Gauss-Bonnet [GB] system in string theory. Future extensions of the present results are outlined.
Ronald F. Fox
2015-03-12T23:59:59.000Z
In this paper, we develop further the theory of thermostated systems along the lines of our earlier paper. Two results are highlighted: 1) in the Markov limit of the contracted description, a least dissipation of Helmholtz free energy principle is established; and 2) a detailed account of the appropriateness of this principle for nano-biology, including the evolution of life, is presented.
Can bio-inspired information processing steps be realized as synthetic biochemical processes?
Vladimir Privman; Evgeny Katz
2014-11-07T23:59:59.000Z
We consider possible designs and experimental realiza-tions in synthesized rather than naturally occurring bio-chemical systems of a selection of basic bio-inspired information processing steps. These include feed-forward loops, which have been identified as the most common information processing motifs in many natural pathways in cellular functioning, and memory-involving processes, specifically, associative memory. Such systems should not be designed to literally mimic nature. Rather, we can be guided by nature's mechanisms for experimenting with new information/signal processing steps which are based on coupled biochemical reactions, but are vastly simpler than natural processes, and which will provide tools for the long-term goal of understanding and harnessing nature's information processing paradigm. Our biochemical processes of choice are enzymatic cascades because of their compatibility with physiological processes in vivo and with electronics (e.g., electrodes) in vitro allowing for networking and interfacing of enzyme-catalyzed processes with other chemical and biochemical reactions. In addition to designing and realizing feed-forward loops and other processes, one has to develop approaches to probe their response to external control of the time-dependence of the input(s), by measuring the resulting time-dependence of the output. The goal will be to demonstrate the expected features, for example, the delayed response and stabilizing effect of the feed-forward loops.
Modeling Tomorrow's Biorefinery--the NREL Biochemical Pilot Plant
Not Available
2008-03-01T23:59:59.000Z
Brochure describing the capabilities of NREL's Biochemical Pilot Plant. In this facility, researchers test ideas for creating high-value products from cellulosic biomass.
Biochemical processes for geothermal brine treatment
Premuzic, E.T.; Lin, M.S.; Bohenek, M.; Joshi-Tope, G.; Zhou, W.; Shelenkova, L.; Wilke, R.
1998-08-01T23:59:59.000Z
As part of the DOE Geothermal Energy Program, BNL`s Advanced Biochemical Processes for Geothermal Brines (ABPGB) project is aimed at the development of cost-efficient and environmentally acceptable technologies for the disposal of geothermal wastes. Extensive chemical studies of high and low salinity brines and precipitates have indicated that in addition to trace quantities of regulated substances, e.g., toxic metals such as arsenic and mercury, there are significant concentrations of valuable metals, including gold, silver and platinum. Further chemical and physical studies of the silica product have also shown that the produced silica is a valuable material with commercial potential. A combined biochemical and chemical technology is being developed which (1) solubilizes, separates, and removes environmentally regulated constituents in geothermal precipitates and brines, (2) generates an amorphous silica product which may be used as feedstock for the production of revenue generating materials, (3) recover economically valuable trace metals and salts. Geothermal power resources which utilize low salinity brines and use the Stretford process for hydrogen sulfide abatement generate a contaminated sulfur cake. Combined technology converts such sulfur to a commercial grade sulfur, suitable for agricultural use. The R and D activities at BNL are conducted jointly with industrial parties in an effort focused on field applications.
BIOCHEMICAL PROCESSES FOR GEOTHERMAL BRINE TREATMENT
PREMUZIC,E.T.; LIN,M.S.; BOHENEK,M.; JOSHI-TOPE,G.; ZHOU,W.; SHELENKOVA,L.; WILKE,R.
1998-09-20T23:59:59.000Z
As part of the DOE Geothermal Energy Program, BNL's Advanced Biochemical Processes for Geothermal Brines (ABPGB) project is aimed at the development of cost-efficient and environmentally acceptable technologies for the disposal of geothermal wastes. Extensive chemical studies of high and low salinity brines and precipitates have indicated that in addition to trace quantities of regulated substances, e.g., toxic metals such as arsenic and mercury, there are significant concentrations of valuable metals, including gold, silver and platinum. Further chemical and physical studies of the silica product have also shown that the produced silica is a valuable material with commercial potential. A combined biochemical and chemical technology is being developed which (1) solubilizes, separates, and removes environmentally regulated constituents in geothermal precipitates and brines (2) generates an amorphous silica product which may be used as feedstock for the production of revenue generating materials, (3) recover economically valuable trace metals and salts. Geothermal power resources which utilize low salinity brines and use the Stretford process for hydrogen sulfide abatement generate a contaminated sulfur cake. Combined technology converts such sulfur to a commercial grade sulfur, suitable for agricultural use. The R and D activities at BNL are conducted jointly with industrial parties in an effort focused on field applications.
Few-Nucleon Forces and Systems in Chiral Effective Field Theory
Evgeny Epelbaum
2005-09-14T23:59:59.000Z
We outline the structure of the nuclear force in the framework of chiral effective field theory of QCD and review recent applications to processes involving few nucleons.
Chiral effective field theory analysis of hadronic parity violation in few-nucleon systems
Viviani, Michele [INFN; Baroni, Alessandro [ODU; Girlanda, Luca [Lecce U.; Kievsky, Alejandro [Pisa U,; Marcucci, Laura E. [Pisa U,; Schiavilla, Rocco [ODU, JLAB
2014-06-01T23:59:59.000Z
Background: Weak interactions between quarks induce a parity-violating (PV) component in the nucleonnucleon potential, whose effects are currently being studied in a number of experiments involving few-nucleon systems. In the present work, we reconsider the derivation of this PV component within a chiral effective field theory (chiEFT) framework. Purpose: The objectives of the present work are twofold. The first is to perform a detailed analysis of the PV nucleon-nucleon potential up to next-to-next-to-leading (N2LO) order in the chiral expansion, in particular, by determining the number of independent low-energy constants (LECs) at N2LO. The second objective is to investigate PV effects in a number of few-nucleon observables, including the #2; p-p longitudinal asymmetry, the neutron spin rotation in #2;n-p and #2;n-d scattering, and the longitudinal asymmetry in the {sup 3}He(#2;{vector n},p){sup 3}H chargeexchange reaction. Methods: The chiEFT PV potential includes one-pion-exchange, two-pion-exchange, and contact terms as well as 1/M (M being the nucleon mass) nonstatic corrections. Dimensional regularization is used to renormalize pion loops. The wave functions for the A = 2?-4 nuclei are obtained by using strong two- and three-body potentials also derived, for consistency, from chiEFT. In the case of the A = 3?-4 systems, the wave functions are computed by expanding on a hyperspherical harmonics functions basis. Results: We find that the PV potential at N2LO depends on six LECs: the pion-nucleon PV coupling constant h^1_pi and five parameters multiplying contact interactions. An estimate for the range of values of the various LECs is provided by using available experimental data, and these values are used to obtain predictions for the other PV observables. Conclusions: The chiEFT approach provides a very satisfactory framework to analyze PV effects in few-nucleon systems.
Unveiling the hidden structure of complex stochastic biochemical networks
Valleriani, Angelo, E-mail: angelo.valleriani@mpikg.mpg.de [Max Planck Institute of Colloids and Interfaces, Department of Theory and Bio-Systems, 14424 Potsdam (Germany)] [Max Planck Institute of Colloids and Interfaces, Department of Theory and Bio-Systems, 14424 Potsdam (Germany); Li, Xin [Department of Chemistry, Rice University, Houston, Texas 77005 (United States)] [Department of Chemistry, Rice University, Houston, Texas 77005 (United States); Kolomeisky, Anatoly B. [Department of Chemistry and Center for Theoretical Biological Physics, Rice University, Houston, Texas 77005 (United States)] [Department of Chemistry and Center for Theoretical Biological Physics, Rice University, Houston, Texas 77005 (United States)
2014-02-14T23:59:59.000Z
Complex Markov models are widely used and powerful predictive tools to analyze stochastic biochemical processes. However, when the network of states is unknown, it is necessary to extract information from the data to partially build the network and estimate the values of the rates. The short-time behavior of the first-passage time distributions between two states in linear chains has been shown recently to behave as a power of time with an exponent equal to the number of intermediate states. For a general Markov model we derive the complete Taylor expansion of the first-passage time distribution between two arbitrary states. By combining algebraic methods and graph theory approaches it is shown that the first term of the Taylor expansion is determined by the shortest path from the initial state to the final state. When this path is unique, we prove that the coefficient of the first term can be written in terms of the product of the transition rates along the path. It is argued that the application of our results to first-return times may be used to estimate the dependence of rates on external parameters in experimentally measured time distributions.
Peter Degenfeld-Schonburg; Carlos Navarrete-Benlloch; Michael J. Hartmann
2015-03-11T23:59:59.000Z
Nonlinear quantum optical systems are of paramount relevance for modern quantum technologies, as well as for the study of dissipative phase transitions. Their nonlinear nature makes their theoretical study very challenging and hence they have always served as great motivation to develop new techniques for the analysis of open quantum systems. In this article we apply the recently developed self-consistent projection operator theory to the degenerate optical parametric oscillator to exemplify its general applicability to quantum optical systems. We show that this theory provides an efficient method to calculate the full quantum state of each mode with high degree of accuracy, even at the critical point. It is equally successful in describing both the stationary limit and the dynamics, including regions of the parameter space where the numerical integration of the full problem is significantly less efficient. We further develop a Gaussian approach consistent with our theory, which yields sensibly better results than the previous Gaussian methods developed for this system, most notably standard linearization techniques.
Chjan Lim
2006-08-09T23:59:59.000Z
A family of spin-lattice models are derived as convergent finite dimensional approximations to the rest frame kinetic energy of a barotropic fluid coupled to a massive rotating sphere. In not fixing the angular momentum of the fluid component, there is no Hamiltonian equations of motion of the fluid component of the coupled system. This family is used to formulate a statistical equilibrium model for the energy - relative enstrophy theory of the coupled barotropic fluid - rotating sphere system, known as the spherical model, which because of its microcanonical constraint on relative enstrophy, does not have the low temperature defect of the classical energy - enstrophy theory. This approach differs from previous works and through the quantum - classical mapping between quantum field theory in spatial dimension $d$ and classical statistical mechanics in dimension $d+1,$ provides a new example of Feynman's generalization of the Least Action Principle to problems that do not have a standard Lagrangian or Hamiltonian. A simple mean field theory for this statistical equlibrium model is formulated and solved, providing precise conditions on the planetary spin and relative enstrophy in order for phase transitions to occur at positive and negative critical temperatures, $T_{+}$ and $T_{-}.$
Sociology: Computational Organization Theory Sociology: Computational Organization Theory
Sadeh, Norman M.
Sociology: Computational Organization Theory Sociology: Computational Organization Theory Kathleen; organization theory; organizational learning; social networks; expert systems Citation: Kathleen Carley, 1994, "Sociology: Computational Organization Theory." Social Science Computer Review, 12(4): 611-624. #12;Sociology
Xavier Busch
2014-11-06T23:59:59.000Z
The two main predictions of quantum field theory in curved space-time, namely Hawking radiation and cosmological pair production, have not been directly tested and involve ultra high energy configurations. As a consequence, they should be considered with caution. Using the analogy with condensed matter systems, their analogue versions could be tested in the lab. Moreover, the high energy behavior of these systems is known and involves dispersion and dissipation, which regulate the theory at short distances. When considering experiments which aim to test the above predictions, there will also be a competition between the stimulated emission from thermal noise and the spontaneous emission out of vacuum. In order to measure these effects, one should thus compute the consequences of UV dispersion and dissipation, and identify observables able to establish that the spontaneous emission took place. In this thesis, we first analyze the effects of dispersion and dissipation on both Hawking radiation and pair particle production. To get explicit results, we work in the context of de Sitter space. Using the extended symmetries of the theory in such a background, exact results are obtained. These are then transposed to the context of black holes using the correspondence between de Sitter space and the black hole near horizon region. To introduce dissipation, we consider an exactly solvable model producing any decay rate. We also study the quantum entanglement of the particles so produced. In a second part, we consider explicit condensed matter systems, namely Bose Einstein condensates and exciton-polariton systems. We analyze the effects of dissipation on entanglement produced by the dynamical Casimir effect. As a final step, we study the entanglement of Hawking radiation in the presence of dispersion for a generic analogue system.
Multiple capillary biochemical analyzer with barrier member
Dovichi, Norman J. (Edmonton, CA); Zhang, Jian Z. (Edmonton, CA)
1996-01-01T23:59:59.000Z
A multiple capillary biochemical analyzer for sequencing DNA and performing other analyses, in which a set of capillaries extends from wells in a microtiter plate into a cuvette. In the cuvette the capillaries are held on fixed closely spaced centers by passing through a sandwich construction having a pair of metal shims which squeeze between them a rubber gasket, forming a leak proof seal for an interior chamber in which the capillary ends are positioned. Sheath fluid enters the chamber and entrains filament sample streams from the capillaries. The filament sample streams, and sheath fluid, flow through aligned holes in a barrier member spaced close to the capillary ends, into a collection chamber having a lower glass window. The filament streams are illuminated above the barrier member by a laser, causing them to fluoresce. The fluorescence is viewed end-on by a CCD camera chip located below the glass window. The arrangement ensures an equal optical path length from all fluorescing spots to the CCD chip and also blocks scattered fluorescence illumination, providing more uniform results and an improved signal to noise ratio.
Multiple capillary biochemical analyzer with barrier member
Dovichi, N.J.; Zhang, J.Z.
1996-10-22T23:59:59.000Z
A multiple capillary biochemical analyzer is disclosed for sequencing DNA and performing other analyses, in which a set of capillaries extends from wells in a microtiter plate into a cuvette. In the cuvette the capillaries are held on fixed closely spaced centers by passing through a sandwich construction having a pair of metal shims which squeeze between them a rubber gasket, forming a leak proof seal for an interior chamber in which the capillary ends are positioned. Sheath fluid enters the chamber and entrains filament sample streams from the capillaries. The filament sample streams, and sheath fluid, flow through aligned holes in a barrier member spaced close to the capillary ends, into a collection chamber having a lower glass window. The filament streams are illuminated above the barrier member by a laser, causing them to fluoresce. The fluorescence is viewed end-on by a CCD camera chip located below the glass window. The arrangement ensures an equal optical path length from all fluorescing spots to the CCD chip and also blocks scattered fluorescence illumination, providing more uniform results and an improved signal-to-noise ratio. 12 figs.
Kinship Algebra Expert System (KAES): A Software Implementation of a Cultural Theory
Read, Dwight W
2006-01-01T23:59:59.000Z
Mouton. Read / Kinship Algebra Expert System Lowie, R. H. (M. D. (2005). Kinship algebra expert system. RetrievedRead Kinship Algebra Expert Social / Science Computer Review
PICARD-FUCHS EQUATIONS, INTEGRABLE SYSTEMS AND HIGHER ALGEBRAIC K-THEORY
In [21], building up on his work on the functional Mordell conjecture, Y.I.Manin has found a framework groups CHp (X, n) which have good intersection with each fiber 1991 Mathematics Subject Classification. This part builds up on work of Donagi and Mark- man [12]. The upshot is that algebraic K-theory brings a new
2011 Biomass Program Platform Peer Review: Biochemical Conversion
None
2012-02-01T23:59:59.000Z
This document summarizes the recommendations and evaluations provided by an independent external panel of experts at the 2011 U.S. Department of Energy Biomass Program’s Biochemical Conversion Platform Review meeting.
EXISTENCE OF RADIAL STATIONARY SOLUTIONS FOR A SYSTEM IN COMBUSTION THEORY
Paris-Sud XI, Université de
on a one step kinetic reaction and our system is obtained by approximating the standard Arrehnius law
What can one learn about Self-Organized Criticality from Dynamical Systems theory ?
Ph. Blanchard; B. Cessac; T. Krueger
1999-12-06T23:59:59.000Z
We develop a dynamical system approach for the Zhang's model of Self-Organized Criticality, for which the dynamics can be described either in terms of Iterated Function Systems, or as a piecewise hyperbolic dynamical system of skew-product type. In this setting we describe the SOC attractor, and discuss its fractal structure. We show how the Lyapunov exponents, the Hausdorff dimensions, and the system size are related to the probability distribution of the avalanche size, via the Ledrappier-Young formula.
Schell, D.
2009-08-01T23:59:59.000Z
April to June, 2009 edition of the National Bioenergy Center's Biochemical Platform Integration Project quarterly newsletter.
Schell, D.
2010-01-01T23:59:59.000Z
October to December, 2009 edition of the National Bioenergy Center's Biochemical Platform Integration Project quarterly newsletter.
Schell, D. J.
2008-12-01T23:59:59.000Z
July to September, 2008 edition of the National Bioenergy Center's Biochemical Platform Integration Project quarterly newsletter.
Schell, D.
2009-10-01T23:59:59.000Z
July to September, 2009 edition of the National Bioenergy Center's Biochemical Platform Integration Project quarterly newsletter.
Schell, D.
2008-01-01T23:59:59.000Z
October to December, 2007 edition of the newsletter of the Biochemical Platform Process Integration project.
Mariana Kirchbach; Andreas Wirzba
1996-11-01T23:59:59.000Z
The generating functional of heavy baryon chiral perturbation theory at order O(Q^2) in the mean field approximation (with a pseudoscalar source coupling which is consistent with the PCAC-Ward identities on the current quark level) has been exploited to derive Migdal's in--medium pion propagator. It is shown that the prediction for the density dependence of the quark condensate obtained on the composite hadron level by embedding PCAC within the framework of Migdal's approach to finite Fermi systems is identical to that resulting from QCD.
Kirchbach, M; Kirchbach, Mariana; Wirzba, Andreas
1996-01-01T23:59:59.000Z
The generating functional of heavy baryon chiral perturbation theory at order {\\cal O}(Q^2) in the mean field approximation (with a pseudoscalar source coupling which is consistent with the PCAC-Ward identities on the current quark level) has been exploited to derive Migdal's in--medium pion propagator. It is shown that the prediction for the density dependence of the quark condensate obtained on the composite hadron level by embedding PCAC within the framework of Migdal's approach to finite Fermi systems is identical to that resulting from QCD.
Automated synthesis of reliable and efficient systems through game theory: a case study
Randour, Mickael
2012-01-01T23:59:59.000Z
Reactive computer systems bear inherent complexity due to continuous interactions with their environment. While this environment often proves to be uncontrollable, we still want to ensure that critical computer systems will not fail, no matter what they face. Examples are legion: railway traffic, power plants, plane navigation systems, etc. Formal verification of a system may ensure that it satisfies a given specification, but only applies to an already existing model of a system. In this work, we address the problem of synthesis: starting from a specification of the desired behavior, we show how to build a suitable system controller that will enforce this specification. In particular, we discuss recent developments of that approach for systems that must ensure Boolean behaviors (e.g., reachability, liveness) along with quantitative requirements over their execution (e.g., never drop out of fuel, ensure a suitable mean response time). We notably illustrate a powerful, practically useable algorithm for the aut...
Biochemical and Genetic Characterization of Bacteriophage Holins
To, Kam Ho
2013-11-06T23:59:59.000Z
.......................................................................................... 92 Mutational analyses of the lambda holin gene ......................................... 92 viii Overview of the directed mutagenesis system ......................................... 96 Overview of the results... .......................................................................................................... 152 The new Mu lysis system ....................................................................... 152 Diversity in holin topology .................................................................... 157 CHAPTER VI CONCLUSIONS AND FUTURE DIRECTION...
Gao, Johnway [Richland, WA; Skeen, Rodney S [Pendleton, OR
2002-05-28T23:59:59.000Z
The present invention is a pulse spilling self-aerator (PSSA) that has the potential to greatly lower the installation, operation, and maintenance cost associated with aerating and mixing aqueous solutions. Currently, large quantities of low-pressure air are required in aeration systems to support many biochemical production processes and wastewater treatment plants. Oxygen is traditionally supplied and mixed by a compressor or blower and a mechanical agitator. These systems have high-energy requirements and high installation and maintenance costs. The PSSA provides a mixing and aeration capability that can increase operational efficiency and reduce overall cost.
Ford, David N.
Perceptions of Real Options in Large System Acquisition: Empirical Descriptions and Comparison Postgraduate School Monterey, California May 18 - 19, 2005 #12;1 Perceptions of Real Options in Large System to meet performance, schedule, and cost targets. Flexibility in the form of real options can
Asplund, Erik; Kluener, Thorsten [Institut fuer Reine und Angewandte Chemie, Carl von Ossietzky Universitaet Oldenburg, Postfach 2503, D-26111 Oldenburg (Germany)
2012-03-28T23:59:59.000Z
In this paper, control of open quantum systems with emphasis on the control of surface photochemical reactions is presented. A quantum system in a condensed phase undergoes strong dissipative processes. From a theoretical viewpoint, it is important to model such processes in a rigorous way. In this work, the description of open quantum systems is realized within the surrogate Hamiltonian approach [R. Baer and R. Kosloff, J. Chem. Phys. 106, 8862 (1997)]. An efficient and accurate method to find control fields is optimal control theory (OCT) [W. Zhu, J. Botina, and H. Rabitz, J. Chem. Phys. 108, 1953 (1998); Y. Ohtsuki, G. Turinici, and H. Rabitz, J. Chem. Phys. 120, 5509 (2004)]. To gain control of open quantum systems, the surrogate Hamiltonian approach and OCT, with time-dependent targets, are combined. Three open quantum systems are investigated by the combined method, a harmonic oscillator immersed in an ohmic bath, CO adsorbed on a platinum surface, and NO adsorbed on a nickel oxide surface. Throughout this paper, atomic units, i.e., ({Dirac_h}/2{pi})=m{sub e}=e=a{sub 0}= 1, have been used unless otherwise stated.
Can we advance macroscopic quantum systems outside the framework of complex decoherence theory?
Mark E. Brezinski; Maria Rupnick
2013-12-30T23:59:59.000Z
Macroscopic quantum systems (MQS) are macroscopic systems driven by quantum rather than classical mechanics, a long studied area with minimal success till recently. Harnessing the benefits of quantum mechanics on a macroscopic level would revolutionize fields ranging from telecommunication to biology, the latter focused on here for reasons discussed. Contrary to misconceptions, there are no known physical laws that prevent the development of MQS. Instead, they are generally believed universally lost in complex systems from environmental entanglements (decoherence). But we argue success is achievable MQS with decoherence compensation developed, naturally or artificially, from top-down rather current reductionist approaches. This paper advances the MQS field by a complex systems approach to decoherence. First, why complex system decoherence approaches (top-down) are needed is discussed. Specifically, complex adaptive systems (CAS) are not amenable to reductionist models (and their master equations) because of emergent behavior, approximation failures, not accounting for quantum compensator mechanisms, ignoring path integrals, and the subentity problem. In addition, since MQS must exist within the context of the classical world, rapid decoherence and prolonged coherence are both needed. Nature has already demonstrated this for quantum subsystems such as photosynthesis and magnetoreception. Second, we perform a preliminary study that illustrates a top-down approach to potential MQS. In summary, reductionist arguments against MQS are not justifiable. It is more likely they are not easily detectable in large intact classical systems or has been destroyed by reductionist experimental set-ups. This complex systems decoherence approach, using top down investigations, is critical to paradigm shifts in MQS research both in biological and non-biological systems.
Lynch, Herchel Eugene
1968-01-01T23:59:59.000Z
oi tiie gpprosch Present practices in pred:cting system effectiveness during the initicl concept or formulation phase involves other approaches in addition to the comparison technioue which is a comparison of the new system with prior generic... est ountercd probability d'stributions. 15 ifaintained Systems L'ving orgar'. sms which have died cannot be repaired, but most . qu pmerit can be and us!!ally is; thus, a n a! ype of failure distri" bution may be coucieved. Ihis new type...
Time-odd mean fields in covariant density functional theory I. Non-rotating systems
A. V. Afanasjev; H. Abusara
2010-10-09T23:59:59.000Z
Time-odd mean fields (nuclear magnetism) are analyzed in the framework of covariant density functional theory (CDFT). It is shown that they always provide additional binding to the binding energies of odd-mass nuclei. This additional binding only weakly depends on the RMF parametrization reflecting good localization of the properties of time-odd mean fields in CDFT. The underlying microscopic mechanism is discussed in detail. Time-odd mean fields affect odd-even mass differences. However, our analysis suggests that the modifications of the strength of pairing correlations required to compensate for their effects are modest. In contrast, time-odd mean fields have profound effect on the properties of odd-proton nuclei in the vicinity of proton-drip line. Their presence can modify the half-lives of proton-emitters (by many orders of magnitude in light nuclei) and affect considerably the possibilities of their experimental observation.
Plasma equilibrium in 3D magnetic confinement systems and soliton theory
Skovoroda, A. A. [Russian Research Centre Kurchatov Institute, Nuclear Fusion Institute (Russian Federation)
2009-08-15T23:59:59.000Z
Single-valued conformal flux (magnetic) coordinates can always be introduced on arbitrary toroidal magnetic surfaces. It is shown how such coordinates can be obtained by transforming Boozer magnetic coordinates on the surfaces. The metrics is substantially simplified and the coordinate grid is orthogonalized at the expense of a more complicated representation of the magnetic field in conformal flux coordinates. This in turn makes it possible to introduce complex angular flux coordinates on any toroidal magnetic surface and to develop efficient methods for a complex analysis of the geometry of equilibrium magnetic surfaces. The complex analysis reveals how the plasma equilibrium problem is related to soliton theory. Magnetic surfaces of constant mean curvature are considered to exemplify this relationship.
The Theory of Functional Forms of the Consumer Demand System and its Application
Usui, Ikuyasu
2010-01-25T23:59:59.000Z
This dissertation studies the consumer demand system focusing on its functional forms in the theoretical aspect and the empirical aspect. The theoretical part investigates the regularity property of the consumer demand ...
Ahmadi, Amir Ali
2008-01-01T23:59:59.000Z
Lyapunov's direct method, which is based on the existence of a scalar function of the state that decreases monotonically along trajectories, still serves as the primary tool for establishing stability of nonlinear systems. ...
The theory of diversity and redundancy in information system security : LDRD final report.
Mayo, Jackson R. (Sandia National Laboratories, Livermore, CA) [Sandia National Laboratories, Livermore, CA; Torgerson, Mark Dolan; Walker, Andrea Mae; Armstrong, Robert C. (Sandia National Laboratories, Livermore, CA) [Sandia National Laboratories, Livermore, CA; Allan, Benjamin A. (Sandia National Laboratories, Livermore, CA) [Sandia National Laboratories, Livermore, CA; Pierson, Lyndon George
2010-10-01T23:59:59.000Z
The goal of this research was to explore first principles associated with mixing of diverse implementations in a redundant fashion to increase the security and/or reliability of information systems. Inspired by basic results in computer science on the undecidable behavior of programs and by previous work on fault tolerance in hardware and software, we have investigated the problem and solution space for addressing potentially unknown and unknowable vulnerabilities via ensembles of implementations. We have obtained theoretical results on the degree of security and reliability benefits from particular diverse system designs, and mapped promising approaches for generating and measuring diversity. We have also empirically studied some vulnerabilities in common implementations of the Linux operating system and demonstrated the potential for diversity to mitigate these vulnerabilities. Our results provide foundational insights for further research on diversity and redundancy approaches for information systems.
Systemic risk in energy derivative markets: a graph-theory analysis
Paris-Sud XI, Université de
products, as well as financial assets), we find that crude oil stands at the heart of the system in commodity markets might therefore be explained by external events like the fall in stock prices
Rulkov, Nikolai F.
replace pseudo-random carrier signals widely used in modern spread-spectrum communication systems (see1436 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 48, NO. 12, DECEMBER 2001 Digital Communication Using Chaotic-Pulse-Position Modulation Nikolai F. Rulkov
Yao, Jianping
2968 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 58, NO. 11, NOVEMBER 2010 An Unbalanced Temporal Pulse-Shaping System for Chirped Microwave Waveform Generation Ming Li, Member, IEEE, IEEE Abstract--An unbalanced temporal pulse-shaping (TPS) system for chirped microwave waveform
Attard, Phil
Statistical mechanical theory for the structure of steady state systems: Application to a Lennard-Jones fluid with applied temperature gradient Phil Attard School of Chemistry F11, University of Sydney, New statistical mechanics for inhomogeneous systems may now be applied to determining the structure
Glenn A Roth; Fatih Aydogan
2014-09-01T23:59:59.000Z
This is Part II of two articles describing the details of thermal-hydraulic sys- tem codes. In this second part of the article series, the system code closure relationships (used to model thermal and mechanical non-equilibrium and the coupling of the phases) for the governing equations are discussed and evaluated. These include several thermal and hydraulic models, such as heat transfer coefficients for various flow regimes, two phase pressure correlations, two phase friction correlations, drag coefficients and interfacial models be- tween the fields. These models are often developed from experimental data. The experiment conditions should be understood to evaluate the efficacy of the closure models. Code verification and validation, including Separate Effects Tests (SETs) and Integral effects tests (IETs) is also assessed. It can be shown from the assessments that the test cases cover a significant section of the system code capabilities, but some of the more advanced reactor designs will push the limits of validation for the codes. Lastly, the limitations of the codes are discussed by considering next generation power plants, such as Small Modular Reactors (SMRs), analyz- ing not only existing nuclear power plants, but also next generation nuclear power plants. The nuclear industry is developing new, innovative reactor designs, such as Small Modular Reactors (SMRs), High-Temperature Gas-cooled Reactors (HTGRs) and others. Sub-types of these reactor designs utilize pebbles, prismatic graphite moderators, helical steam generators, in- novative fuel types, and many other design features that may not be fully analyzed by current system codes. This second part completes the series on the comparison and evaluation of the selected reactor system codes by discussing the closure relations, val- idation and limitations. These two articles indicate areas where the models can be improved to adequately address issues with new reactor design and development.
Field theory and weak Euler-Lagrange equation for classical particle-field systems
Qin, Hong [PPPL; Burby, Joshua W [PPPL; Davidson, Ronald C [PPPL
2014-10-01T23:59:59.000Z
It is commonly believed that energy-momentum conservation is the result of space-time symmetry. However, for classical particle-field systems, e.g., Klimontovich-Maxwell and Klimontovich- Poisson systems, such a connection hasn't been formally established. The difficulty is due to the fact that particles and the electromagnetic fields reside on different manifolds. To establish the connection, the standard Euler-Lagrange equation needs to be generalized to a weak form. Using this technique, energy-momentum conservation laws that are difficult to find otherwise can be systematically derived.
David Y Gao; Ning Ruan; Vittorio Latorre
2014-11-26T23:59:59.000Z
Canonical duality-triality is a breakthrough methodological theory, which can be used not only for modeling complex systems within a unified framework, but also for solving a wide class of challenging problems from real-world applications. This paper presents a brief review on this theory, its philosophical origin, physics foundation, and mathematical statements in both finite and infinite dimensional spaces, with emphasizing on its role for bridging the gap between nonconvex analysis/mechanics and global optimization. Special attentions are paid on unified understanding the fundamental difficulties in large deformation mechanics, bifurcation/chaos in nonlinear science, and the NP-hard problems in global optimization, as well as the theorems, methods, and algorithms for solving these challenging problems. Misunderstandings and confusions on some basic concepts, such as objectivity, nonlinearity, Lagrangian, and generalized convexities are discussed and classified. Breakthrough from recent challenges and conceptual mistakes by M. Voisei, C. Zalinescu and his co-worker are addressed. Some open problems and future works in global optimization and nonconvex mechanics are proposed.
Theory for hydrostatic gas journal bearings for micro-electro-mechanical systems
Liu, Lixian, Ph. D. Massachusetts Institute of Technology
2005-01-01T23:59:59.000Z
The goal of the MIT micro-engine project is to develop high-speed rotating Power MEMS (Micro-Electro-Mechanical Systems) using computer chip fabrication technologies. To produce high power (10-50 W) in a small volume (less ...
Photodissociation in quantum chaotic systems: Random-matrix theory of cross-section fluctuations
Fyodorov, Y.V. [Fachbereich Physik, Universitaet-GH Essen, D-45117 Essen (Germany)] [Fachbereich Physik, Universitaet-GH Essen, D-45117 Essen (Germany); Alhassid, Y. [Center for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, Connecticut 06520 (United States)] [Center for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, Connecticut 06520 (United States)
1998-11-01T23:59:59.000Z
Using the random matrix description of open quantum chaotic systems we calculate in closed form the universal autocorrelation function and the probability distribution of the total photodissociation cross section in the regime of quantum chaos. {copyright} {ital 1998} {ital The American Physical Society}
Reveliotis, Spiridon "Spyros"
automated production systems [16, 36], the task assignment and the coordinated navigation of the fleets production and service facili- ties [28, 33], the traffic management of the automated railway and monorail these results to a particular GSPN sub-class that models the operations of a capacitated re-entrant line. 1
Signal and System Theory II, FS 2015 Prof. J. Lygeros Automatic Control Laboratory
Lygeros, John
Figure 1: Scheme of quadrocopter and surroundings ETH Students Tamara and Robert have bought an AR.Drone (see Figure 1). Assume that the only forces acting on the AR.drone are the four thruster forces/4 0 0 0 1/8 . . . } is applied to the drone. Model this discrete time system using Matlab and simulate
Desheng Li
2010-05-26T23:59:59.000Z
In this paper we first construct smooth Morse-Lyapunov functions of attractors for nonsmooth dynamical systems. Then we prove that all open attractor neighborhoods of an attractor have the same homotopy type. Based on this basic fact we finally introduce the concept of critical group for Morse sets of an attractor and establish Morse inequalities and equations.
A REVIEW OF LINEAR RESPONSE THEORY FOR GENERAL DIFFERENTIABLE DYNAMICAL SYSTEMS.
#erentiable dynamical system, identify nonequilibÂ rium steady states (NESS), and study how these vary under the ''attractor'' corresponding to the NESS). If the chaotic hypothesis does not hold, two new phenomena may arise. The first is a violation of linear response in the sense that the NESS does not depend di
Strategic Structural Reorganization in Multi-agent Systems Inspired by Social Organization Theory
Nematollahi Mahani, Maryamossadat
2012-08-31T23:59:59.000Z
. . . . . . . . . . 53 5.2.3 Organization and Reorganization Models using S-MOISE+ . . . . . . . . . 54 5.3 Evaluation Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 5.4 Experimental Evaluation... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 6.3.2 System Dynamics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 6.4 Organization and Reorganization Models using J-MOISE+ . . . . . . . . . . . . . 72 6.5 Experimental Setup...
Wales, Alaska High Penetration Wind-Diesel Hybrid Power System: Theory of Operation
Drouilhet, S.; Shirazi, M.
2002-05-01T23:59:59.000Z
To reduce the cost of rural power generation and the environmental impact of diesel fuel usage, the Alaska Energy Authority (AEA), Kotzebue Electric Association (KEA, a rural Alaskan utility), and the National Renewable Energy Laboratory (NREL), began a collaboration in late 1995 to implement a high-penetration wind-diesel hybrid power system in a village in northwest Alaska. The project was intended to be both a technology demonstration and a pilot for commercial replication of the system in other Alaskan villages. During the first several years of the project, NREL focused on the design and development of the electronic controls, the system control software, and the ancillary components (power converters, energy storage, electric dump loads, communications links, etc.) that would be required to integrate new wind turbines with the existing diesels in a reliable highly automated system. Meanwhile, AEA and KEA focused on project development activities, including wind resource assessment, site selection and permitting, community relationship building, and logistical planning. Ultimately, the village of Wales, Alaska, was chosen as the project site. Wales is a native Inupiat village of approximately 160 inhabitants, with an average electric load of about 75 kW.
M. Lapert; R. Tehini; G. Turinici; D. Sugny
2009-05-29T23:59:59.000Z
We consider the optimal control of quantum systems interacting non-linearly with an electromagnetic field. We propose new monotonically convergent algorithms to solve the optimal equations. The monotonic behavior of the algorithm is ensured by a non-standard choice of the cost which is not quadratic in the field. These algorithms can be constructed for pure and mixed-state quantum systems. The efficiency of the method is shown numerically on molecular orientation with a non-linearity of order 3 in the field. Discretizing the amplitude and the phase of the Fourier transform of the optimal field, we show that the optimal solution can be well-approximated by pulses that could be implemented experimentally.
Recent Progress in the Physics of Open Quantum Systems: Theory and Experiment
Rotter, I
2015-01-01T23:59:59.000Z
This Report explores recent advances in our understanding of the physics of open quantum systems (OQSs) which consist of some localized region that is coupled to an external environment. Examples of such systems may be found in numerous areas of physics including mesoscopic physics that provides the main focus of this review. We provide a detailed discussion of the behavior of OQSs in terms of the projection-operator formalism, according to which the system under study is considered to be comprised of a localized region ($Q$), embedded into a well-defined environment ($P$) of scattering wavefunctions (with $Q+P=1$). The $Q$ subspace must be treated using the concepts of non-Hermitian physics, and of particular interest here is: the capacity of the environment to mediate a coupling between the different states of $Q$; the role played by the presence of exceptional points (EPs) in the spectra of OQSs; the influence of EPs on the rigidity of the wavefunction phases, and; the ability of EPs to initiate a dynamica...
Advanced biochemical processes for geothermal brines FY 1998 annual operating plan
NONE
1997-10-01T23:59:59.000Z
As part of the overall Geothermal Energy Research which is aimed at the development of economical geothermal resources production systems, the aim of the Advanced Biochemical Processes for Geothermal Brines (ABPGB) effort is the development of economic and environmentally acceptable methods for disposal of geothermal wastes and conversion of by-products to useful forms. Methods are being developed for dissolution, separation and immobilization of geothermal wastes suitable for disposal, usable in inert construction materials, suitable for reinjection into the reservoir formation, or used for recovery of valuable metals.
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory Foaming Options · Compressed Air Foam Systems (CAFS) · Foam Blower · Foam Generator · Nozzle Systems #12;Disposal: Science and Theory Compressed Industry owned response team #12;Disposal: Science and Theory Commercial CAFS for Poultry · Poultry
Application of convolution theory for solving non-linear flow problems: gas flow systems
Mireles, Thomas Joseph
1995-01-01T23:59:59.000Z
. . . . . . . . . . . . 15 3. 2. 1 Generalized Analytical Solution for Real Gas Systems . . . . . . . . 15 3. 2. 2 Dry Gas Material Balance Relations: P(tn) - g(u) Identity. . . . . . 16 3. 3 Functional and Numerical Data Models for the Non-Linear CHAPTER IV Component... of the functions. " By applying this theorem and taking the Laplace transform of the right hand side of Eq. 3. 1 (expressed by Eq. 3. 3), we obtain Eq. 3. 4. Q(ft * fj)(t)) = ft(u) g(u) . where the non-linear transform function is given as g(u) = X(g(t)) . (3...
Author's personal copy Molecular & Biochemical Parasitology 155 (2007) 167171
Davis, Richard E.
2007-01-01T23:59:59.000Z
Author's personal copy Molecular & Biochemical Parasitology 155 (2007) 167171 Short technical report An improved and secreted luciferase reporter for schistosomes Guofeng Cheng, Richard E. Davis in schistosomes. In the current study, we demonstrate that a Gaussia luciferase reporter leads to significantly
Biochemical Production of Endophytic Yeast Biofuel: what and why
Brown, Sally
Biochemical Production of Endophytic Yeast Biofuel: what and why In the U.S., the debate about biofuel - an alternative transportation fuel coming from current- ly living organisms - is still contended consumptions. The future of biofuel re- lies on lignocellulose from fast growing plants native to the sites
Genomics & Medicine http://biochem118.stanford.edu/
Brutlag, Doug
Genomics & Medicine http://biochem118.stanford.edu/ Doug Brutlag Professor Emeritus of Biochemistry & Medicine Stanford University School of Medicine Structural Variants in the Human Genome #12;Henry Stewart by Prof. Stephen Scherer · CNVs in human genomes by Prof. Chris Ponting · The Future of CNVs: Sequence
Richardson, David
1994. A THEORY OF MANIPULATION AND CONTROL FOR MICROFABRICATED ACTUATOR ARRAYS Karl-Friedrich Bohringer-sensorless manipulation 5, 7 , we have developed geomet- ric theories of manipulation and control for microactuator ar of microactuators and a theory of sensorless, parallel manipulation, and we describe e cient algorithms
Ma, Junfen, 1972-
2003-01-01T23:59:59.000Z
One strategy to reduce costs in manufacturing a biochemical product is simplification of downstream processing. Biochemical product recovery often starts from fermentation broth or cell culture. In conventional downstream ...
Wu, Wei [Department of Physics and Astronomy and Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States); Wang, Jin, E-mail: jin.wang.1@stonybrook.edu [Department of Physics and Astronomy and Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States); State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, China and College of Physics, Jilin University, 130021 Changchun (China)
2014-09-14T23:59:59.000Z
We have established a general non-equilibrium thermodynamic formalism consistently applicable to both spatially homogeneous and, more importantly, spatially inhomogeneous systems, governed by the Langevin and Fokker-Planck stochastic dynamics with multiple state transition mechanisms, using the potential-flux landscape framework as a bridge connecting stochastic dynamics with non-equilibrium thermodynamics. A set of non-equilibrium thermodynamic equations, quantifying the relations of the non-equilibrium entropy, entropy flow, entropy production, and other thermodynamic quantities, together with their specific expressions, is constructed from a set of dynamical decomposition equations associated with the potential-flux landscape framework. The flux velocity plays a pivotal role on both the dynamic and thermodynamic levels. On the dynamic level, it represents a dynamic force breaking detailed balance, entailing the dynamical decomposition equations. On the thermodynamic level, it represents a thermodynamic force generating entropy production, manifested in the non-equilibrium thermodynamic equations. The Ornstein-Uhlenbeck process and more specific examples, the spatial stochastic neuronal model, in particular, are studied to test and illustrate the general theory. This theoretical framework is particularly suitable to study the non-equilibrium (thermo)dynamics of spatially inhomogeneous systems abundant in nature. This paper is the second of a series.
Schell, D.
2008-04-01T23:59:59.000Z
January-March, 2008 edition of the quarterly update for the National Bioenergy Center's Biochemical Platform Integration Project.
Schell, D.
2009-01-01T23:59:59.000Z
October to December, 2008 edition of the National Bioenergy Center?s Biochemical Platform Integration Project quarterly newsletter.
Chjan C. Lim
2006-08-09T23:59:59.000Z
A new variational principle - extremizing the fixed frame kinetic energy under constant relative enstrophy - for a coupled barotropic flow - rotating solid sphere system is introduced with the following consequences. In particular, angular momentum is transfered between the fluid and the solid sphere through a modelled torque mechanism. The fluid's angular momentum is therefore not fixed but only bounded by the relative enstrophy, as is required of any model that supports super-rotation. The main results are: At any rate of spin $\\Omega $ and relative enstrophy, the unique global energy maximizer for fixed relative enstrophy corresponds to solid-body super-rotation; the counter-rotating solid-body flow state is a constrained energy minimum provided the relative enstrophy is small enough, otherwise, it is a saddle point. For all energy below a threshold value which depends on the relative enstrophy and solid spin $\\Omega $, the constrained energy extremals consist of only minimizers and saddles in the form of counter-rotating states$.$ Only when the energy exceeds this threshold value can pro-rotating states arise as global maximizers. Unlike the standard barotropic vorticity model which conserves angular momentum of the fluid, the counter-rotating state is rigorously shown to be nonlinearly stable only when it is a local constrained minima. The global constrained maximizer corresponding to super-rotation is always nonlinearly stable.
Theory and experiment reveal unexpected calcium profiles in one-dimensional systems
S. L. Mironov
2013-04-30T23:59:59.000Z
Calcium is an ubiquitous second messenger that triggers a plethora of key physiological responses. The events are initiated in micro- or nano-sized compartments and determined by the complex interactions with calcium-binding proteins and mechanisms of calcium clearance. Local calcium increases in the vicinity of single channels represent an essentially non-linear reaction-diffusion problem that have been analysed previously using various linearized approximations. I revisited the problem of stationary patterns that can be generated by the point calcium source in the presence of buffer and obtained new explicit solutions. Main results of the analysis of the calcium buffering are supplemented with pertinent derivations and discussion of respective mathematical problems in Appendices. I show that for small calcium influx the calcium gradients around established around channel lumen have quasi-exponential form. For bigger fluxes, when the buffer is saturated, the model predicts periodic patterns. The transition between the two regimes depend on the capacity of buffer and its mobility. Theoretical predictions were examined using a model one-dimensional system. For sufficiently big fluxes the oscillatory calcium patterns were observed. Theoretical and experimental results are discussed in terms of their possible physiological implications.
DENSE MULTIPHASE FLOW SIMULATION: CONTINUUM MODEL FOR POLY-DISPERSED SYSTEMS USING KINETIC THEORY
Moses Bogere
2011-08-31T23:59:59.000Z
The overall objective of the project was to verify the applicability of the FCMOM approach to the kinetic equations describing the particle flow dynamics. For monodispersed systems the fundamental equation governing the particle flow dynamics is the Boltzmann equation. During the project, the FCMOM was successfully applied to several homogeneous and in-homogeneous problems in different flow regimes, demonstrating that the FCMOM has the potential to be used to solve efficiently the Boltzmann equation. However, some relevant issues still need to be resolved, i.e. the homogeneous cooling problem (inelastic particles cases) and the transition between different regimes. In this report, the results obtained in homogeneous conditions are discussed first. Then a discussion of the validation results for in-homogeneous conditions is provided. And finally, a discussion will be provided about the transition between different regimes. Alongside the work on development of FCMOM approach studies were undertaken in order to provide insights into anisotropy or particles kinetics in riser hydrodynamics. This report includes results of studies of multiphase flow with unequal granular temperatures and analysis of momentum re-distribution in risers due to particle-particle and fluid-particle interactions. The study of multiphase flow with unequal granular temperatures entailed both simulation and experimental studies of two particles sizes in a riser and, a brief discussion of what was accomplished will be provided. And finally, a discussion of the analysis done on momentum re-distribution of gas-particles flow in risers will be provided. In particular a discussion of the remaining work needed in order to improve accuracy and predictability of riser hydrodynamics based on two-fluid models and how they can be used to model segregation in risers.
In Journal of Intelligent and Robotic Systems: Theory and Applications. Special Issue on ComÂ putational Aspects of Robot Kinematics, Dynamics, and Control Vol. 9, pp. 121Â148, 1994. Computational Considerations in the Implementation of Force Control Strategies Richard Volpe \\Lambda and Pradeep Khosla y
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 50, NO. 8, AUGUST 2003 1103 Small-Signal Analysis of Frequency-Controlled Electronic Ballasts Yan Yin, Student of frequency-controlled dimming electronic ballasts. A modified phasor transformation is proposed that converts
. Building Simulation Modeling Environments Using Systems Theory and Software Architecture Principles Hessam the relationships between the realm of (i) model building and simulation execution in conjunction with (ii) softwareTo Be Presented at the Advanced Simulation Technology Symposium (ASTC), Washington DC, April 2004
Tse, Chi K. "Michael"
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 50, NO. 5 that may be applied to determine whether an observed time series is inconsis- tent with a specific class to the residuals of nonlinear models is equiv- alent to fitting that model subject to an information theoretic
Maryland at College Park, University of
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 45, NO. 7 the construction of a normal form is applied. This method applies to many power electronic circuits as well, 1997. This work was supported by the Department of Energy (Mathematical, Information, and Computational
Lucien Hardy
2013-03-06T23:59:59.000Z
We discuss how to reconstruct quantum theory from operational postulates. In particular, the following postulates are consistent only with for classical probability theory and quantum theory. Logical Sharpness: There is a one-to-one map between pure states and maximal effects such that we get unit probability. This maximal effect does not give probability equal to one for any other pure state. Information Locality: A maximal measurement is effected on a composite system if we perform maximal measurements on each of the components. Tomographic Locality: The state of a composite system can be determined from the statistics collected by making measurements on the components. Permutability: There exists a reversible transformation on any system effecting any given permutation of any given maximal set of distinguishable states for that system. Sturdiness: Filters are non-flattening. To single out quantum theory we need only add any requirement that is inconsistent with classical probability theory and consistent with quantum theory.
Mehdi Farzanehpour; I. V. Tokatly
2015-06-29T23:59:59.000Z
We use analytic (current) density-potential maps of time-dependent (current) density functional theory (TD(C)DFT) to inverse engineer analytically solvable time-dependent quantum problems. In this approach the driving potential (the control signal) and the corresponding solution of the Schr\\"odinger equation are parametrized analytically in terms of the basic TD(C)DFT observables. We describe the general reconstruction strategy and illustrate it with a number of explicit examples. First we consider the real space one-particle dynamics driven by a time-dependent electromagnetic field and recover, from the general TDDFT reconstruction formulas, the known exact solution for a driven oscillator with a time-dependent frequency. Then we use analytic maps of the lattice TD(C)DFT to control quantum dynamics in a discrete space. As a first example we construct a time-dependent potential which generates prescribed dynamics on a tight-binding chain. Then our method is applied to the dynamics of spin-1/2 driven by a time dependent magnetic field. We design an analytic control pulse that transfers the system from the ground to excited state and vice versa. This pulse generates the spin flip thus operating as a quantum NOT gate.
Control of Noise in Chemical and Biochemical Information Processing
Vladimir Privman
2010-10-09T23:59:59.000Z
We review models and approaches for error-control in order to prevent the buildup of noise when gates for digital chemical and biomolecular computing based on (bio)chemical reaction processes are utilized to realize stable, scalable networks for information processing. Solvable rate-equation models illustrate several recently developed methodologies for gate-function optimization. We also survey future challenges and possible new research avenues.
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory Brief History of Foam 2004 Bud and foam 2009 No advantage for gas #12;Disposal: Science and Theory What is foam? · What is fire fighting system. #12;Disposal: Science and Theory Foam Composition · Foam can include Mixture of surfactants
How Minds Work Global Workspace Theory
Memphis, University of
1 How Minds Work Global Workspace Theory Stan Franklin Computer Science Division & Institute for Intelligent Systems The University of Memphis #12;February 3, 2005 HMW: Global Workspace Theory 2 Global Workspace Theory Â· A Theory of Consciousness Â· A Theory of Cognition Â· A Theory of Mind #12;February 3
Valerio Lucarini
2015-06-23T23:59:59.000Z
Using straightforward linear algebra we derive response operators describing the impact of small perturbations to finite state Markov processes. The results can be used for studying empirically constructed - e.g. from observations or through coarse graining of model simulations - finite state approximation of statistical mechanical systems. Recent results concerning the convergence of the statistical properties of finite state Markov approximation of the full asymptotic dynamics on the SRB measure in the limit of finer and finer partitions of the phase space are suggestive of some degree of robustness of the obtained results in the case of Axiom A system. Our findings give closed formulas for the linear and nonlinear response theory at all orders of perturbation and provide matrix expressions that can be directly implemented in any coding language, plus providing bounds on the radius of convergence of the perturbative theory. In particular, we relate the convergence of the response theory to the rate of mixing of the unperturbed system. One can use the formulas obtained for finite state Markov processes to recover previous findings obtained on the response of continuous time Axiom A dynamical systems to perturbations, by considering the generator of time evolution for the measure and for the observables.
Maxwell's demon in biochemical signal transduction with feedback loop
Sosuke Ito; Takahiro Sagawa
2015-04-15T23:59:59.000Z
Signal transduction in living cells is vital to maintain life itself, where information transfer in noisy environment plays a significant role. In a rather different context, the recent intensive researches of "Maxwell's demon" - a feedback controller that utilizes information of individual molecules - has led to a unified theory of information and thermodynamics. Here we combine these two streams of researches, and show that the second law of thermodynamics with information reveals the fundamental limit of the robustness of signal transduction against environmental fluctuations. Especially, we found that the degree of robustness is quantitatively characterized by an informational quantity called transfer entropy. Our information-thermodynamic approach is applicable to biological communication inside cells, in which there is no explicit channel coding in contrast to artificial communication. Our result would open up a novel biophysical approach to understand information processing in living systems on the basis of the fundamental information-thermodynamics link.
An overview of system modeling and identification Gerard Favier
Paris-Sud XI, Université de
useful for various application areas including chemical and biochemical processes (distillation columns developed for designing model- based control systems. More generally, parameter estimation is at the heart
Stochastic optimization and its applications in time- varying wireless systems
Lin, Yih-Hao
2007-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)Field: Electrical Engineering (Communication Theory andin Electrical Engineering (Communication Theory and Systems)
Synchronization error channels & windowed decoding in theory & practice
Iyengar, Aravind Raghava
2012-01-01T23:59:59.000Z
M. S. in Electrical Engineering (Communication Theory & Sys-D. in Electrical Engineering (Communication Theory & Sys-in Electrical Engineering (Communication Theory & Systems)
Performance analysis and enhancement of mobile OFDM systems
Algharabally, Mishal
2007-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)in Electrical Engineering (Communication Theory and Systems)
Laboratory reproducibility of biochemical markers of bone turnover in clinical practice
Schafer, A. L.; Vittinghoff, E.; Ramachandran, R.; Mahmoudi, N.; Bauer, D. C.
2010-01-01T23:59:59.000Z
2 ORIGINAL ARTICLE Laboratory reproducibility of biochemicalSummary To determine the laboratory reproducibility of urinedinal and within-run laboratory reproducibility varied
Biochemical Production of Ethanol from Corn Stover: 2008 State of Technology Model
Humbird, D.; Aden, A.
2009-08-01T23:59:59.000Z
An update to the FY 2007 assessment of the state of technical research progress toward biochemical process goals, quantified in terms of Minimum Ethanol Selling Price.
Biochemical Production of Ethanol from Corn Stover: 2007 State of Technology Model
Aden, A.
2008-05-01T23:59:59.000Z
An update to the FY 2005 assessment of the state of technical research progress toward biochemical process goals. This assessment contains research results from 2006 and 2007.
Structure and Biochemical Activities of Escherichia coli MgsA
Page, Asher N.; George, Nicholas P.; Marceau, Aimee H.; Cox, Michael M.; Keck, James L. (UW)
2012-02-27T23:59:59.000Z
Bacterial 'maintenance of genome stability protein A' (MgsA) and related eukaryotic enzymes play important roles in cellular responses to stalled DNA replication processes. Sequence information identifies MgsA enzymes as members of the clamp loader clade of AAA{sup +} proteins, but structural information defining the family has been limited. Here, the x-ray crystal structure of Escherichia coli MgsA is described, revealing a homotetrameric arrangement for the protein that distinguishes it from other clamp loader clade AAA{sup +} proteins. Each MgsA protomer is composed of three elements as follows: ATP-binding and helical lid domains (conserved among AAA{sup +} proteins) and a tetramerization domain. Although the tetramerization domains bury the greatest amount of surface area in the MgsA oligomer, each of the domains participates in oligomerization to form a highly intertwined quaternary structure. Phosphate is bound at each AAA{sup +} ATP-binding site, but the active sites do not appear to be in a catalytically competent conformation due to displacement of Arg finger residues. E. coli MgsA is also shown to form a complex with the single-stranded DNA-binding protein through co-purification and biochemical studies. MgsA DNA-dependent ATPase activity is inhibited by single-stranded DNA-binding protein. Together, these structural and biochemical observations provide insights into the mechanisms of MgsA family AAA{sup +} proteins.
Applications of biochemical processes in geothermal and other industries
Premuzic, E.T.; Lin, M.S.; Jin, J.Z.
1994-06-01T23:59:59.000Z
Laboratory studies aimed at the development of economically and technically feasible, and environmentally acceptable technology for the disposal of geothermal sludges and wastes have led to the development of biochemical processes which meet the above conditions. A pilot-scale plant has been constructed and used to identify process variables and optimize processing conditions. The total process is flexible and can be used in several modes of operation which include (1) solubilization and removal of many metals, including radionuclides, from brines and sludges; (2) selective removal of a few metals; (3) concentration of metals; (4) recovery of metals; and (5) recovery of salts. The end product is a silica-type material which meets regulatory requirements, while the aqueous phase meets drinking water standards and can be reinjected and/or used for irrigation. Preliminary engineering studies of the metal and salt recovery technologies have indicated that significant cost benefits could be obtained by means of combined processing. Recent accomplishments in the development of new biochemical technologies will be discussed in this paper.
Song, Xueyu
density functional theory. The equilibrium interfacial density profiles and interfacial free energies were of density profile. We found that the average interfacial free energy is about 0.78, which is in reasonable of the crystal-melt interface is the interfacial free energy. Experimentally, this quantity can be extracted from
Antsaklis, Panos
. Antsaklis and Z. Gao, "On the Theory of Polynomial Matrix Interpolation and its Role in Systems and Control. Gao, "On the Theory of Polynomial Matrix Interpolation and its Role in Systems and Control," P roc. o, "On the Theory of Polynomial Matrix Interpolation and its Role in Systems and Control," P roc. o f
Francalanza, Adrian
The Danger Theory and Its Application to Artificial Immune Systems Proceedings of the 1st Internat Conference on ARtificial Immune Systems (ICARIS-2002), pp 141-148, Canterbury, UK, 2002. Uwe Aickelin School in the Artificial Immune Systems world. A number of potential application areas are then used to provide a framing
Nagurka, Mark L.
traditional mechanical parts. In high-speed maglev train systems and magnetic bearing systems, non parameter changes are common. Two examples of changes in the levitated load are: (1) a magnetic bearing expeROBUST CONTROL DESIGN OF A SINGLE DEGREE-OF-FREEDOM MAGNETIC LEVITATION SYSTEM BY QUANTITATIVE
Song, Young-Ho; Lazauskas, Rimantas; Park, Tae-Sun [Department of Physics, Duke University, Durham, North Carolina 27708 (United States); IPHC, IN2P3-CNRS/Universite Louis Pasteur BP 28, F-67037 Strasbourg Cedex 2 (France); Department of Physics and BAERI, Sungkyunkwan University, Suwon 440-746 (Korea, Republic of)
2009-06-15T23:59:59.000Z
M1 properties, comprising magnetic moments and radiative capture of thermal neutron observables, are studied in two- and three-nucleon systems. We use meson exchange current derived up to N{sup 3}LO using heavy baryon chiral perturbation theory a la Weinberg. Calculations have been performed for several qualitatively different realistic nuclear Hamiltonians, which permits us to analyze model dependence of our results. Our results are found to be strongly correlated with the effective range parameters such as binding energies and the scattering lengths. Taking into account such correlations, the results are in good agreement with the experimental data with small model dependence.
Boolean Theory laws proof Number Theory Character Theory
Hehner, Eric C.R.
Review Boolean Theory laws proof Number Theory Character Theory Bunches Sets Strings Lists for loop 1/109 #12;Review Boolean Theory laws proof Number Theory Character Theory Bunches Sets Strings with exit for loop 2/109 #12;Review Boolean Theory laws proof Number Theory Character Theory Bunches Sets
Topos theory and `neo-realist' quantum theory
Andreas Doering
2007-12-24T23:59:59.000Z
Topos theory, a branch of category theory, has been proposed as mathematical basis for the formulation of physical theories. In this article, we give a brief introduction to this approach, emphasising the logical aspects. Each topos serves as a `mathematical universe' with an internal logic, which is used to assign truth-values to all propositions about a physical system. We show in detail how this works for (algebraic) quantum theory.
Broader source: Energy.gov [DOE]
Modeling the Physical and Biochemical Influence of Ocean Thermal Energy Conversion Plant Discharges into their Adjacent Waters
Performance of Non-Gaussian Distribution Based Communication and Compressed Sensing Systems /
Kwon, Hwan Joon
2013-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)Philosophy Electrical Engineering (Communication Theory andin Electrical Engineering (Communication Theory and Systems)
Coulomb interactions within Halo Effective Field Theory
Renato Higa
2007-11-30T23:59:59.000Z
I present preliminary results of effective field theory applied to nuclear cluster systems, where Coulomb interactions play a significant role.
Not Available
2012-04-01T23:59:59.000Z
Winter 2011-2012 issue of the National Bioenergy Center Biochemical Platform Integration Project quarterly update. Issue topics: 34th Symposium on Biotechnology for Fuels and Chemicals; feasibility of NIR spectroscopy-based rapid feedstock reactive screening; demonstrating integrated pilot-scale biomass conversion. The Biochemical Process Integration Task focuses on integrating the processing steps in enzyme-based lignocellulose conversion technology. This project supports the U.S. Department of Energy's efforts to foster development, demonstration, and deployment of 'biochemical platform' biorefineries that economically produce ethanol or other fuels, as well as commodity sugars and a variety of other chemical products, from renewable lignocellulosic biomass.
Yuan, Jinchao
2007-01-01T23:59:59.000Z
In this study, we investigated the multiple steady state behavior, an important observation in numerical and experimental studies in natural ventilation systems. The-oretical models are developed and their applications in ...
Hjelmfelt, A.; Harding, R.H.; Tsujimoto, K.K.; Ross, J. (Department of Chemistry, Stanford University, Stanford, California 94305 (US))
1990-03-15T23:59:59.000Z
Periodic perturbations are applied to the input fluxes of reactants in a system which exhibits autonomous oscillations, the combustion of acetaldehyde (ACH) and oxygen, and a system which exhibits damped oscillations, the combustion of methane and oxygen. The ACH system is studied by experiments and numerical analysis and the methane system is studied by numerical analysis. The periodic perturbations are in the form of a two-term Fourier series. Such perturbations may generate multiple attractors, which are either periodic or chaotic. We discuss two types of bistable responses: a new phase bistability, in which a subharmonic frequency is added to a sinusoidal perturbation at different phases relative to the periodic response; and jump phenomena, in which the resonant frequency of a nonlinear oscillator depends on the amplitude of the periodic perturbation. Both the ACH and the methane systems confirm the phase bistability. The additional complex behavior of bistability due to jump phenomena is seen only in calculations in the methane system. In both types of bistability a hysteresis loop is formed as we vary the form of the periodic perturbation. In the methane system, we find period doubling to chaos occuring on one branch of the hysteresis loop while the other branch remains periodic. The methane system has been studied in the context of the efficiency of power production. We calculate the efficiency corresponding to each bistable attractor and find one branch of each pair to be the more efficient mode of operation. In the case of the coexisting periodic and chaotic attractors the chaotic attractor is the more efficient mode of operation.
Method for detection of long-lived radioisotopes in small biochemical samples
Turteltaub, Kenneth W. (Livermore, CA); Vogel, John S. (Union City, CA); Felton, James S. (Danville, CA); Gledhill, Barton L. (Alamo, CA); Davis, Jay C. (Livermore, CA)
1994-01-01T23:59:59.000Z
Disclosed is a method for detection of long-lived radioisotopes in small bio-chemical samples, comprising: a. selecting a biological host in which radioisotopes are present in concentrations equal to or less than those in the ambient biosphere, b. preparing a long-lived radioisotope labeled reactive chemical specie, c. administering said chemical specie to said biologist host in doses sufficiently low to avoid significant overt damage to the biological system thereof, d. allowing a period of time to elapse sufficient for dissemination and interaction of said chemical specie with said host throughout said biological system of said host, e. isolating a reacted fraction of the biological substance from said host in a manner sufficient to avoid contamination of said substance from extraneous sources, f. converting said fraction of biological substance by suitable means to a material which efficiently produces charged ions in at least one of several possible ion sources without introduction of significant isotopic fractionation, and, g. measuring the radioisotope concentration in said material by means of direct isotopic counting.
Boolean Theory laws proof Number Theory Character Theory
Hehner, Eric C.R.
construction induction Recursive Program Definition construction induction Theory Design and Implementation Definition construction induction Theory Design and Implementation data theory program theory Data Recursive Data Definition construction induction Recursive Program Definition construction induction Theory
INDUCED BIOCHEMICAL INTERACTIONS IN IMMATURE AND BIODEGRADED HEAVY CRUDE OILS
PREMUZIC,E.T.; LIN,M.S.; BOHENEK,M.; JOSHI-TOPE,G.; SHELENKOVA,L.; ZHOU,W.M.
1998-10-27T23:59:59.000Z
Studies in which selective chemical markers have been used to explore the mechanisms by which biocatalysts interact with heavy crude oils have shown that the biochemical reactions follow distinct trends. The term biocatalyst refers to a group of extremophilic microorganisms which, under the experimental conditions used, interact with heavy crude oils to (1) cause a redistribution of hydrocarbons, (2) cause chemical changes in oil fractions containing sulfur compounds and lower the sulfur content, (3) decrease organic nitrogen content, and (4) decrease the concentration of trace metals. Current data indicate that the overall effect is due to simultaneous reactions yielding products with relatively higher concentration of saturates and lower concentrations of aromatics and resins. The compositional changes depend on the microbial species and the chemistry of the crudes. Economic analysis of a potential technology based on the available data indicate that such a technology, used in a pre-refinery mode, may be cost efficient and promising. In the present paper, the background of oil biocatalysis and some recent results will be discussed.
Induced biochemical interactions in immature and biodegraded heavy crude oils
Premuzic, E.T.; Lin, M.S.; Bohenek, M.; Joshi-Tope, G.; Shelenkova, L.; Zhou, W.M.
1998-11-01T23:59:59.000Z
Studies in which selective chemical markers have been used to explore the mechanisms by which biocatalysts interact with heavy crude oils have shown that the biochemical reactions follow distinct trends. The term biocatalyst refers to a group of extremophilic microorganisms which, under the experimental conditions used, interact with heavy crude oils to (1) cause a redistribution of hydrocarbons, (2) cause chemical changes in oil fractions containing sulfur compounds and lower the sulfur content, (3) decrease organic nitrogen content, and (4) decrease the concentration of trace metals. Current data indicate that the overall effect is due to simultaneous reactions yielding products with relatively higher concentration of saturates and lower concentrations of aromatics and resins. The compositional changes depend on the microbial species and the chemistry of the crudes. Economic analysis of a potential technology based on the available data indicate that such a technology, used in a pre-refinery mode, may be cost efficient and promising. In the present paper, the background of oil biocatalysis and some recent results will be discussed.
Collins, James J.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 44, NO. 10, OCTOBER 1997 1027 REFERENCES [1] M. J. Ogorzalek, "Taming chaos--Part II: Control," IEEE Trans. Circuits and methodolo- gies in controlling chaotic nonlinear dynamical systems," Int. J. Bifurc. Chaos, vol. 3, pp. 1363
Analysis and design of interference-limited wireless systems
Stamatiou, Konstantinos
2009-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)in Electrical Engineering (Communication Theory and Systems)MSc, Electrical Engineering (Communication Theory & Systems)
Biochemical Conversion: Using Enzymes, Microbes, and Catalysis to Make Fuels and Chemicals
None
2013-07-26T23:59:59.000Z
This fact sheet describes the Bioenergy Technologies Office's biochemical conversion work and processes. BETO conducts collaborative research, development, and demonstration projects to improve several processing routes for the conversion of cellulosic biomass.
Camey, Sarah
2013-08-31T23:59:59.000Z
Background: Despite an abundance of soy interventions, the effect of soy isoflavones prior to curative treatment for localized prostate cancer on biochemical recurrence has not been evaluated. Objective: To determine if short-term supplementation...
National Bioenergy Center--Biochemical Platform Integration Project: Quarterly Update, Fall 2010
Schell, D.
2010-12-01T23:59:59.000Z
Fall 2010 edition of the National Bioenergy Center's Biochemical Platform Integration Project quarterly newsletter. Issue topics: rapid analysis models for compositional analysis of intermediate process streams; engineered arabinose-fermenting Zymomonas mobilis strain.
BIOENERGY/BIOFUELS/BIOCHEMICALS Chromatographic determination of 1, 4-b-xylooligosaccharides
California at Riverside, University of
BIOENERGY/BIOFUELS/BIOCHEMICALS Chromatographic determination of 1, 4-b For the majority of lignocellulosic feedstocks for produc- tion of bioethanol and other biofuels, heteroxylans activity [22] or further hydrolyzed into fermentable sugars as platform molecules for biofuels [23
Kubiatowicz, John D.
locality and rapid adaptation to arriving and departing nodes. We show how these two properties can widely for availability, durability, and locality.1 This has lead to a renewed interest in techniques storage and balanced computational load. 4. Dynamic Membership: The system must adapt to arriving
Lan, Chenyang
2005-08-29T23:59:59.000Z
Considered in this thesis is multi-input multi-output (MIMO) systems with non-minimum phase (NMP) zeros and unstable poles where some of the unstable poles are located to the right of the NMP zeros. In the single-input single-output (SISO) case...
Reed, Nancy E.
, ISBN: 0262731312. Optional text #1: Artificial Intelligence - A Modern Approach, 2nd edition, Russell of agent systems. Course Objectives: A student should understand (i) the fundamental concepts of agent, Edited by Gerhard Weiss. The MIT Press, Hardcover March 1999, ISBN: 0262731312, or Paperback July 2000
2015-03-12T23:59:59.000Z
Cellar theory. A. Eremenko. March 12, 2015. The temperature on the Earth surface at a given place experiences roughly speaking periodic fluctuation, daily and ...
Quantum theory Bohrification: topos theory and quantum theory
Spitters, Bas
Quantum theory Bohrification: topos theory and quantum theory Bas Spitters Domains XI, 9/9/2014 Bas Spitters Bohrification: topos theory and quantum theory #12;Quantum theory Point-free Topology The axiom, Krein-Millman, Alaoglu, Hahn-Banach, Gelfand, Zariski, ... Bas Spitters Bohrification: topos theory
Shuanhu Qi; Hans Behringer; Friederike Schmid
2013-09-26T23:59:59.000Z
We develop a multiscale hybrid scheme for simulations of soft condensed matter systems, which allows one to treat the system at the particle level in selected regions of space, and at the continuum level elsewhere. It is derived systematically from an underlying particle-based model by field theoretic methods. Particles in different representation regions can switch representations on the fly, controlled by a spatially varying tuning function. As a test case, the hybrid scheme is applied to simulate colloid-polymer composites with high resolution regions close to the colloids. The hybrid simulations are significantly faster than reference simulations of a pure particle-based model, and the results are in good agreement.
Kowalski, Karol; Krishnamoorthy, Sriram; Olson, Ryan M.; Tipparaju, Vinod; Apra, Edoardo
2011-11-30T23:59:59.000Z
The development of reliable tools for excited-state simulations is emerging as an extremely powerful computational chemistry tool for understanding complex processes in the broad class of light harvesting systems and optoelectronic devices. Over the last years we have been developing equation of motion coupled cluster (EOMCC) methods capable of tackling these problems. In this paper we discuss the parallel performance of EOMCC codes which provide accurate description of the excited-state correlation effects. Two aspects are discuss in details: (1) a new algorithm for the iterative EOMCC methods based on the novel task scheduling algorithms, and (2) parallel algorithms for the non-iterative methods describing the effect of triply excited configurations. We demonstrate that the most computationally intensive non-iterative part can take advantage of 210,000 cores of the Cray XT5 system at OLCF. In particular, we demonstrate the importance of non-iterative many-body methods for achieving experimental level of accuracy for several porphyrin-based system.
Complex higher order derivative theories
Margalli, Carlos A.; Vergara, J. David [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico 04510 DF (Mexico)
2012-08-24T23:59:59.000Z
In this work is considered a complex scalar field theory with higher order derivative terms and interactions. A procedure is developed to quantize consistently this system avoiding the presence of negative norm states. In order to achieve this goal the original real scalar high order field theory is extended to a complex space attaching a complex total derivative to the theory. Next, by imposing reality conditions the complex theory is mapped to a pair of interacting real scalar field theories without the presence of higher derivative terms.
Mario G. Silveirinha
2014-06-09T23:59:59.000Z
Here, we develop a comprehensive quantum theory for the phenomenon of quantum friction. Based on a theory of macroscopic quantum electrodynamics for unstable systems, we calculate the quantum expectation of the friction force, and link the friction effect to the emergence of system instabilities related to the Cherenkov effect. These instabilities may occur due to the hybridization of particular guided modes supported by the individual moving bodies, and selection rules for the interacting modes are derived. It is proven that the quantum friction effect can take place even when the interacting bodies are lossless and made of nondispersive dielectrics.
Sethna, James P.
2008-01-01T23:59:59.000Z
: Predictions from a mesoscale theory of continuum dislocation dynamics S. Limkumnerda,Ã, J.P. Sethnab a Zernike developed mesoscale continuum theory of dislocation dynamics, we derive three predictions about plasticity
Confidence from uncertainty - A multi-target drug screening method from robust control theory
Luni, Camilla; Shoemaker, Jason E; Sanft, Kevin R; Petzold, Linda R; Doyle, Francis J
2010-01-01T23:59:59.000Z
method from robust control theory. BMC Systems Biology 2010method from robust control theory Camilla Luni 1 , Jason Eof a method from robust control theory, Structured Singular
Deloach, Scott A.
The AAAI-04 Workshop on Agent Organizations: Theory and Practice. July 25-29, 2004, San Jose work. Related Work Computational organization theory uses mathematical and computational techniques are not exclusive to computational organization theory, results from the field are illuminating. Specifically
Almassalkhi, MR; Hiskens, IA
2015-01-01T23:59:59.000Z
A novel model predictive control (MPC) scheme is developed for mitigating the effects of severe line-overload disturbances in electrical power systems. A piece-wise linear convex approximation of line losses is employed to model the effect of transmission line power flow on conductor temperatures. Control is achieved through a receding-horizon model predictive control (MPC) strategy which alleviates line temperature overloads and thereby prevents the propagation of outages. The MPC strategy adjusts line flows by rescheduling generation, energy storage and controllable load, while taking into account ramp-rate limits and network limitations. In Part II of this paper, the MPC strategy is illustrated through simulation of the IEEE RTS-96 network, augmented to incorporate energy storage and renewable generation.
Introduction to the Mathematical Theory of Control
Bressan, Alberto
Introduction to the Mathematical Theory of Control Alberto Bressan and Benedetto Piccoli September to the mathematical theory of nonlinear control systems. Care has been taken to make the exposition as self of O.D.E. theory, Chapter 3 develops the main concepts and properties of nonlinear control systems
A Universal Hamilton-Jacobi Theory
Manuel de León; David Martín de Diego; Miguel Vaquero
2012-09-24T23:59:59.000Z
In this paper we develop a Hamilton-Jacobi theory in the setting of almost Poisson manifolds. The theory extends the classical Hamilton-Jacobi theory and can be also applied to very general situations including nonholonomic mechanical systems and time dependent systems with external forces.
Biochemical changes in speckled trout (Cynoscion nebulosus) preserved with ice
Glover, James Donald
1970-01-01T23:59:59.000Z
and Jones (1957) suggest that in theory it should be possible to use each or all of the chemical changes in iced or frozen fish for defining a quality index. Before any particular chemical entity can be used for this purpose it should satisfy..., Proteus, Salmonella, and Shigella - several of which would be of prime importance in spoilage of an otherwise good quality product (Merchant and Packer, 1963). Bowman and Larsen (1970) suggested that prompt and careful evisceration of fish helps...
Quantum Field Theory and Representation Theory
Woit, Peter
Quantum Field Theory and Representation Theory Peter Woit woit@math.columbia.edu Department of Mathematics Columbia University Quantum Field Theory and Representation Theory p.1 #12;Outline of the talk · Quantum Mechanics and Representation Theory: Some History Quantum Field Theory and Representation Theory
Smooth Field Theories and Homotopy Field Theories
Wilder, Alan Cameron
2011-01-01T23:59:59.000Z
1 . . . . . . . . 4 Categories of Field Theories 4.1 Functorto super symmetric field theories. CRM Proceedings and0-dimensional super symmetric field theories. preprint 2008.
On Conformal Field Theory and Number Theory
Huang, An
2011-01-01T23:59:59.000Z
Frontiers in Number Theory, Physics, and Ge- ometry II. (Witten, Quantum Field Theory, Crassmannians, and AlgebraicJ. Polchinski, String Theory, Vol. 1, Cambridge Univ.
Reachability Analysis of Stochastic Hybrid Systems: A Biodiesel Production System
Koutsoukos, Xenofon D.
Reachability Analysis of Stochastic Hybrid Systems: A Biodiesel Production System Derek Riley problem because it provides a formal framework to analyze complex systems. Biodiesel production is a realistic biochemical process that can be modeled and analyzed using SHS methods. Analysis of a biodiesel
Recent Progress in Superstring Theory
John H. Schwarz
2000-07-18T23:59:59.000Z
Superstring theory has continued to develop at a rapid clip in the past few years. Following a quick review of some of the major discoveries prior to 1998, this talk focuses on a few of the more recent developments. The topics I have chosen to present are 1) the use of K-theory to classify conserved charges carried by D-branes; 2) tachyon condensation on unstable D-brane systems; and 3) an introduction to noncommutative field theories and their solitons.
Topics in low-dimensional field theory
Crescimanno, M.J.
1991-04-30T23:59:59.000Z
Conformal field theory is a natural tool for understanding two- dimensional critical systems. This work presents results in the lagrangian approach to conformal field theory. The first sections are chiefly about a particular class of field theories called coset constructions and the last part is an exposition of the connection between two-dimensional conformal theory and a three-dimensional gauge theory whose lagrangian is the Chern-Simons density.
Bevir, Mark
2013-01-01T23:59:59.000Z
Marsh, eds. , The State: Theory and Issues. Basingstoke, UK:Passion,” Administra- tive Theory & Praxis 18 (1996), 97–?Public Administration Theory,” Administrative Theory &
Magnetic Backgrounds and Noncommutative Field Theory
Richard J. Szabo
2004-02-09T23:59:59.000Z
This paper is a rudimentary introduction, geared at non-specialists, to how noncommutative field theories arise in physics and their applications to string theory, particle physics and condensed matter systems.
Jagannatham, Aditya K.
2007-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)Degree, Electrical Engineering, (Communication Theory andin Electrical Engineering (Communication Theory and Systems)
Theory in Biology Computational
Goldbeter, Albert
Magazine R601 Theory in Biology Computational biology: A propagating wave of interest Albert Goldbeter Systems biology, computational biology, integrative biology... many names are being used and tendency to take a global view of problems in biology. This field is not entirely novel, but what is clear
Xue, H. T.; Tang, F. L., E-mail: tfl03@mails.tsinghua.edu.cn [State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050 (China); Science and Technology on Surface Engineering Laboratory, Lanzhou Institute of Physics, Lanzhou 730000 (China); Lu, W. J.; Li, X. K.; Zhang, Y. [State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050 (China); Feng, Y. D. [Science and Technology on Surface Engineering Laboratory, Lanzhou Institute of Physics, Lanzhou 730000 (China)
2014-08-07T23:59:59.000Z
The phase diagram of the CuInSe{sub 2}-CuGaSe{sub 2} pseudobinary system was determined using a combination of special quasirandom structure approach, ab initio density functional theory calculations, and thermodynamic modelling. It is shown that the CuIn{sub 1?x}Ga{sub x}Se{sub 2} solution phase has a tendency to phase separation at low temperature. The calculated consolute temperature is 485?K. It is found that both the binodal and spinodal curves are significantly asymmetric and on both curves there are a local maximum and a local minimum, which have not been reported in the previous studies. Our phase diagram can well explain the finding that the inhomogeneity of CuIn{sub 0.25}Ga{sub 0.75}Se{sub 2} is higher than that of CuIn{sub 0.75}Ga{sub 0.25}Se{sub 2} at the same temperature, while the previous phase diagrams cannot. Hence, our phase diagram should be more reliable and applicable.
Department of Systems & Information
Zhigilei, Leonid V.
, communication systems, control systems, economic systems, energy and environmental systems, human factors systems, safety-critical systems, wireless communications, game theory and artificial intelligenceDeveloping Leaders of Innovation Department of Systems & Information Engineering #12;In the U
Noncommutative Quantum Field Theories
H. O. Girotti
2003-03-19T23:59:59.000Z
We start by reviewing the formulation of noncommutative quantum mechanics as a constrained system. Then, we address to the problem of field theories defined on a noncommutative space-time manifold. The Moyal product is introduced and the appearance of the UV/IR mechanism is exemplified. The emphasis is on finding and analyzing noncommutative quantum field theories which are renormalizable and free of nonintegrable infrared singularities. In this last connection we give a detailed discussion of the quantization of the noncommutative Wess-Zumino model as well as of its low energy behavior.
Performance analysis of interference suppression techniques for multiple antenna systems
Amihood, Patrick
2007-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)in Electrical Engineering (Communication Theory and Systems)USA M.S. , Electrical Engineering (Communication Theory and
Demazière, Christophe
reactor using Green's function technique. The applicability of diffusion theory for different types-called open-loop reactor transfer function have been initiated at the Department of Nuclear EngineeringComparative study of 2-group P1 and diffusion theories for the calculation of the neutron noise
Systems theory of Smad signaling
D. C. Clarke; M. D. Betterton; X. Liu
2006-03-22T23:59:59.000Z
Transforming Growth Factor-beta (TGF-beta) signalling is an important regulator of cellular growth and differentiation. The principal intracellular mediators of TGF-beta signalling are the Smad proteins, which upon TGF-beta stimulation accumulate in the nucleus and regulate transcription of target genes. To investigate the mechanisms of Smad nuclear accumulation, we developed a simple mathematical model of canonical Smad signalling. The model was built using both published data and our experimentally determined cellular Smad concentrations (isoforms 2, 3, and 4). We found in mink lung epithelial cells that Smad2 (8.5-12 x 10^4 molecules/cell) was present in similar amounts to Smad4 (9.3-12 x 10^4 molecules/cell), while both were in excess of Smad3 (1.1-2.0 x 10^4 molecules/cell). Variation of the model parameters and statistical analysis showed that Smad nuclear accumulation is most sensitive to parameters affecting the rates of RSmad phosphorylation and dephosphorylation and Smad complex formation/dissociation in the nucleus. Deleting Smad4 from the model revealed that rate-limiting phospho-R-Smad dephosphorylation could be an important mechanism for Smad nuclear accumulation. Furthermore, we observed that binding factors constitutively localised to the nucleus do not efficiently mediate Smad nuclear accumulation if dephosphorylation is rapid. We therefore conclude that an imbalance in the rates of R-Smad phosphorylation and dephosphorylation is likely an important mechanism of Smad nuclear accumulation during TGF-beta signalling.
3USDA Forest Service Gen.Tech.Rep. PSW-GTR-166. 1998. Biochemical Reactions of Ozone in Plants1
3USDA Forest Service Gen.Tech.Rep. PSW-GTR-166. 1998. Biochemical Reactions of Ozone in Plants1 Abstract Plants react biochemically to ozone in three phases: with constitutive chemicals in the apoplastic, plant reactions with ozone result in constitutive molecules such as the ozonolysis of ethylene
0305-0491(95)00119-0 Comp. Biochem. Physiol. Vol. l12B, No. 4, pp. 667-672, 1995
Ahmad, Sajjad
Pergamon 0305-0491(95)00119-0 Comp. Biochem. Physiol. Vol. l12B, No. 4, pp. 667-672, 1995 Copyright © 1995Elsevier Science Inc. Printed in Great Britain. All rights reserved 0305-0491/95$9.50+ 0; Lipid interactions; Phase transitions; Unsaturation. Comp. Biochem. Physiol. l12B, 667-672, 1995
A Biochemical Ocean State Estimate in the Southern1 Ocean Gas Exchange Experiment2
Haine, Thomas W. N.
of the oceanic31 carbon pool. It influences light penetration with consequences for primary productivity1 A Biochemical Ocean State Estimate in the Southern1 Ocean Gas Exchange Experiment2 S. Dwivedi1 , T. W. N. Haine2 and C. E. Del Castillo3 3 1 Department of Atmospheric and Ocean Sciences, University
AN INTEGRATED LUNG-ON-A-CHIP MICROFLUIDIC PLATFORM WITH REAL-TIME BIOCHEMICAL SENSING
Kassegne, Samuel Kinde
AN INTEGRATED LUNG-ON-A-CHIP MICROFLUIDIC PLATFORM WITH REAL-TIME BIOCHEMICAL SENSING, without finding it. Lucius Annaeus Seneca #12;v ABSTRACT OF THE THESIS An Integrated Lung for detection. In this research, we replicate the Lung-on- a-Chip platform with a cystic fibrosis cell line
Not Available
2011-09-01T23:59:59.000Z
Summer 2011 issue of the National Bioenergy Center Biochemical Platform Integration Project quarterly update. Issue topics: evaluating new analytical techniques for measuring soluble sugars in the liquid portion of biomass hydrolysates, and measurement of the fraction of insoluble solids in biomass slurries.
National Bioenergy Center - Biochemical Platform Integration Project: Quarterly Update, Winter 2010
Schell, D.
2011-02-01T23:59:59.000Z
Winter 2011 edition of the National Bioenergy Center's Biochemical Platform Integration Project quarterly newsletter. Issue topics: 33rd Symposium on Biotechnology for Fuels and Chemicals program topic areas; results from reactive membrane extraction of inhibitors from dilute-acid pretreated corn stover; list of 2010 task publications.
Sequencing the Human Genome http://biochem118.stanford.edu/
Brutlag, Doug
Sequencing the Human Genome http://biochem118.stanford.edu/ Doug Brutlag, Professor Emeritus Human Genome Project: Should we do it? · Service, R. F. (2001). The human genome: Objection #1: big collecting. Eliminate funds from investigator initiated science. · Vogel, G. (2001). The human genome
155:427 CHEMICAL & BIOCHEMICAL ENGINEERING DESIGN AND ECONOMICS I FALL 2014 (3 credits)
Muzzio, Fernando J.
of the steps involved in the design and economic evaluation of chemical and biochemical processes. We elaborate and economic evaluation of their project forms their major task during the Spring semester design course (155, optimization and economic evaluation: planning, cost estimation, fixed capital investments, working capital
Schell, D. J.
2011-04-01T23:59:59.000Z
Spring 2011 edition of the National Bioenergy Center's Biochemical Platform Integration Project quarterly newsletter. Issue topics: 33rd Symposium on Biotechnology for Fuels and Chemicals program sessions and special topic sessions; assessment of waste water treatment needs; and an update on new arabinose-to-ethanol fermenting Zymomonas mobilis strains.
Riley, Margaret
2012-01-01T23:59:59.000Z
, Smith College, Northampton, MA 01063, U.S.A. Abstract Pathogenic bacteria resistant to many or all1438 Biochemical Society Transactions (2012) Volume 40, part 6 Resistance is futile: the bacteriocin model for addressing the antibiotic resistance challenge Margaret A. Riley*1 , Sandra M. Robinson
Biobased Chemicals Landscape in 2015: What’s the Role of Biochemicals in the Bioeconomy?
Broader source: Energy.gov [DOE]
Breakout 3-B: The Changing Landscapes for Biobased Chemicals: A Decade After the Top Value Added Chemicals from Biomass Biobased Chemicals Landscape in 2015: What’s the Role of Biochemicals in the Bioeconomy? Ken Williams, Program Leader/Principal Chemical Engineer, Nature Works, LLC
Piard, Veronique D.
1994-01-01T23:59:59.000Z
between the concept of entropy/mutual information of information theory and mean squared error (MSE) estimation theory with respect to an N-link discretetime communication system. This research analyzes and develops mathematically this correspondence...
Coarse graining and control theory model reduction
Carlson, Jean
Coarse graining and control theory model reduction David E. Reynolds 1 ABSTRACT: We explain a method, inspired by control the- ory model reduction and interpolation theory, that rigorously applicable to nonequilibrium systems. KEY WORDS: coarse graining; control theory; model reduc- tion; Hankel
Coarse graining and control theory model reduction
Carlson, Jean
Coarse graining and control theory model reduction David E. Reynolds 1 ABSTRACT: We explain a method, inspired by control theÂ ory model reduction and interpolation theory, that rigorously applicable to nonequilibrium systems. KEY WORDS: coarse graining; control theory; model reducÂ tion; Hankel
Names and Binding in Type Theory
Schöpp, Ulrich
Names and name-binding are useful concepts in the theory and practice of formal systems. In this thesis we study them in the context of dependent type theory. We propose a novel dependent type theory with primitives for the explicit handling...
Theory and Advanced Scientific Presentation to
Theory and Advanced Scientific Computing Presentation to Dr. Walt Polansky Acting Director, MICS Laboratory August 29, 2002 #12;PPPL THEORY PROGRAM Has Well-Defined Target & Approach · TARGET --- RELIABLE systems (longer-term impact) #12;PPPL THEORY/ADVANCED SCIENTIFIC COMPUTING PROGRAM Emphasizes
Mathematical niche theory Mathematical niche theory
Meszéna, Géza
Mathematical niche theory Mathematical niche theory G´eza Mesz´ena1 Gy¨orgy Barab´as2 KalleUniversity of Turku MMEE 2011, Groningen #12;Mathematical niche theory Outline 1 Introduction 2 Core theory 3 Ways of niche segragation 4 Controversies #12;Mathematical niche theory Introduction Why are there so
Systems Biology Approaches and Applications in Obesity, Diabetes, and Cardiovascular Diseases
Meng, Q; Mäkinen, VP; Luk, H; Yang, X
2013-01-01T23:59:59.000Z
studies and systems biology: together at last. Trends Genet:pro- teomics and network biology. Annu Rev Biochem. 2012;81:genomics- and network- driven systems biology approaches for
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Theory and Software Home People Science Highlights Publications Seminars & Meetings Opportunities Advisory Committee Theory and Software Group (X-ray Science Division) The Theory...
Vukmirovic, Nenad
2010-01-01T23:59:59.000Z
Petersilka, Density Functional Theory (Springer, New York,Quantum Dots: Theory Nenad Vukmirovi´ and Lin-Wang Wang cdensity functional theory; electronic structure; empirical
Bevir, Mark
2013-01-01T23:59:59.000Z
Management and Organization Theory: From Panopticon toand covering both organization theory and changing patternsTrust in Organizations: Frontiers of Theory and Research (
Smooth Field Theories and Homotopy Field Theories
Wilder, Alan Cameron
2011-01-01T23:59:59.000Z
CHAPTER 3. FIELD THEORIES Definition 3.2.1. A smooth fielda ’top down’ definition of field theories. Taking as ourin the following. Definition A field theory is a symmetric
2015 Peer Review Presentations-Biochemical Conversion | Department of
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362 ofSubscribeDepartment(EAP)Energy JulyInitiative OfficeSystemsFluorescent2015
Craik, Charles S.
Biochemical Journal Immediate Publication. Published on 03 Oct 2014 as manuscript BJ20140809 with prior permission and as allowed by law. © 2014 The Authors Journal compilation © 2014 Biochemical Society #12;Biochemical Journal Immediate Publication. Published on 03 Oct 2014 as manuscript BJ20140809
Metabolic Futile Cycles and Their Functions: A Systems Analysis of Energy and Control
Hong Qian; Daniel A. Beard
2006-06-14T23:59:59.000Z
It has long been hypothesized that futile cycles in cellular metabolism are involved in the regulation of biochemical pathways. Following the work of Newsholme and Crabtree, we develop a quantitative theory for this idea based on open-system thermodynamics and metabolic control analysis. It is shown that the {\\it stoichiometric sensitivity} of an intermediary metabolite concentration with respect to changes in steady-state flux is governed by the effective equilibrium constant of the intermediate formation, and the equilibrium can be regulated by a futile cycle. The direction of the shift in the effective equilibrium constant depends on the direction of operation of the futile cycle. High stoichiometric sensitivity corresponds to ultrasensitivity of an intermediate concentration to net flow through a pathway; low stoichiometric sensitivity corresponds to super-robustness of concentration with respect to changes in flux. Both cases potentially play important roles in metabolic regulation. Futile cycles actively shift the effective equilibrium by expending energy; the magnitude of changes in effective equilibria and sensitivities is a function of the amount of energy used by a futile cycle. This proposed mechanism for control by futile cycles works remarkably similarly to kinetic proofreading in biosynthesis. The sensitivity of the system is also intimately related to the rate of concentration fluctuations of intermediate metabolites. The possibly different roles of the two major mechanisms for cellular biochemical regulation, namely reversible chemical modifications via futile cycles and shifting equilibrium by macromolecular binding, are discussed.
Dittrich, Peter
2005-01-01T23:59:59.000Z
Reference: Dittrich, P., P. Speroni di Fenizio (2005), Chemical Organization Theory, arXiv:q-bio.MN/0501016 Chemical organization theory: Towards a theory of con- structive dynamical systems Peter Dittrich. The theory consists of two parts. The first part introduces the concept of a chemical organization
E. Schmutzer
2005-02-25T23:59:59.000Z
In this treatise the well-known 2-body problem with a rotating central body is systematically reinvestigated on the basis of the Projective Unified Field Theory (PUFT) under the following aspects (including the special case of the Newton mechanics): First, equation of motion with abstract additional terms being appropriate for the interpretation of the various effects under discussion: tidal friction effect as well as non-tidal effects (e.g. rebound effect as temporal variation of the moment of inertia of the rotating body, general-relativistic Lense-Thirring effect, new scalaric effects of cosmological origin, being an outcome of the scalarity phenomenon of matter (PUFT). Second, numerical evaluation of the theory. Key words: two-body problem with rotating central body -- tidal and non-tidal effects -- scalaric-cosmological influence of the expanding cosmos on the 2-body system.
Maryland at College Park, University of
Bred vectors: theory andBred vectors: theory and applications in operationalapplications predictability (chaos) b) Stable systems are infinitely predictable TRUTH TRUTH FORECAST FORECAST a) Unstable of chaos (Lorenz, 1960s): a) Unstable systems have finite predictability (chaos) b) Stable systems
Biochemical and physical factors affecting color characteristics of selected bovine muscles
McKenna, David Richard
2004-09-30T23:59:59.000Z
for (K/S)572/(K/S)525 values of steaks from 19 beef muscles over 5 days of retail display ........................................................21 3. Least squares means for objective color measurements of 19 beef muscles .......24 4. Least... squares means for (K/S)610/(K/S)525 values of steaks from 19 beef muscles over 5 days of retail display ........................................................27 5. Correlation coefficients of biochemical, physical, and objective color measurements...
Jimenez Vergara, Andrea
2012-10-19T23:59:59.000Z
receptors. Research efforts have focused on engineering scaffolds that mimic the ECM microenvironment using biomaterials. Scaffold properties such as chemical composition, surface chemistry and mechanical properties can be used to control cell adhesion... properties, and the desired biochemical stimuli can be incorporated as a design parameter. One of the most widely used synthetic biomaterials for the study of cell behavior are polymers. Mechanical properties, chemical composition and specific degradation...
Exploring the Pinhole: Biochemical and Genetic Studies on the Prototype Pinholin, S21
Pang, Ting
2011-08-08T23:59:59.000Z
and advice, and great help and support on my writing skills. I would like to thank Dr. Christos Savva for his contribution on the EM analysis of S2168. I would also like to thank Dr. Taehyun Park, for building a great foundation on this project... with opposing functions .................... 12 Genetic and biochemical analysis of the lambda holin S105 .......................................... 15 T4 T, a large-hole holin with a single TMD ................ 18 The mechanism...
Morog, Joseph V
1981-01-01T23:59:59.000Z
General systems theory provides a conceptual framework for the integration of knowledge from a wide variety of specialized fields. Systems theory serves to synthesize, reconcile, and integrate knowledge making it possible ...
Langley, Pat
2013-01-01T23:59:59.000Z
on a Theory of Human Problem Solving Pat Langley PATRICK.W.LANGLEY@GMAIL.COM Nishant Trivedi NHTRIVED In this paper, we present an extended account of human problem solving and describe its implemen- tation within four additional elaborations that bring the framework into closer alignment with human problem-solving
Walsh, Timothy Francis; Reese, Garth M.; Bhardwaj, Manoj Kumar
2011-11-01T23:59:59.000Z
Salinas provides a massively parallel implementation of structural dynamics finite element analysis, required for high fidelity, validated models used in modal, vibration, static and shock analysis of structural systems. This manual describes the theory behind many of the constructs in Salinas. For a more detailed description of how to use Salinas, we refer the reader to Salinas, User's Notes. Many of the constructs in Salinas are pulled directly from published material. Where possible, these materials are referenced herein. However, certain functions in Salinas are specific to our implementation. We try to be far more complete in those areas. The theory manual was developed from several sources including general notes, a programmer notes manual, the user's notes and of course the material in the open literature.
A proposed gravitodynamic theory
T. Chang
1997-03-18T23:59:59.000Z
This paper proposes a gravitodynamic theory because there are similarities between gravitational theory and electrodynamics. Based on Einstein's principle of equivalence, two coordinate conditions are proposed into the four-dimensional line element and transformations. As a consequence,the equation of motion for gravitational force or inertial force has a form similar to the equation of Lorentz force on a charge in electrodynamics. The inertial forces in auniformly rotating system are calculated, which show that the Coriolis force is produced by a magnetic-type gravitational field. We have also calculated the Sagnac effect due to the rotation. These experimental facts strongly support our proposed coordinate conditions. In addition, the gravitodynamic field equations are briefly discussed. Since only four gravitational potentials (3 + 1 split) enter the metric tensor, the gravitodynamic field equations in ``3+1 split" form would be analogous to Maxwell's equations.
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Anand, M.; Rajagopal, K.; Rajagopal, K. R.
2003-01-01T23:59:59.000Z
Multiple interacting mechanisms control the formation and dissolution of clots to maintain blood in a state of delicate balance. In addition to a myriad of biochemical reactions, rheological factors also play a crucial role in modulating the response of blood to external stimuli. To date, a comprehensive model for clot formation and dissolution, that takes into account the biochemical, medical and rheological factors, has not been put into place, the existing models emphasizing either one or the other of the factors. In this paper, after discussing the various biochemical, physiologic and rheological factors at some length, we develop a modelmore »for clot formation and dissolution that incorporates many of the relevant crucial factors that have a bearing on the problem. The model, though just a first step towards understanding a complex phenomenon, goes further than previous models in integrating the biochemical, physiologic and rheological factors that come into play.« less
Estimation techniques for large-scale turbulent fluid systems
Colburn, Christopher Hughes
2011-01-01T23:59:59.000Z
R. 1972 Linear Optimal Control Systems. Wiley- Intersciencetime optimal control theory applied to the linear system (time optimal control theory applied to the linear system (
ON THE THREE AXIOMS OF GENERAL DESIGN THEORY Makoto Kikuchi
Kikuchi, Makoto
form is overcame in their theory, but we can still observe some sign of the survival of the paradox. WeON THE THREE AXIOMS OF GENERAL DESIGN THEORY Makoto Kikuchi Department of Computer and Systems Yoshikawa's General Design Theory is an axiomatic theory of design in which design is formulated and dis
Equivalence Relations in Set Theory, Computation Theory and Complexity Theory
Equivalence Relations in Set Theory, Computation Theory and Complexity Theory Denable Equivalence-preserving transformations Unitary equivalence of unitary operators Conformal equivalence of Riemann surfaces These are analytic (1 1 with parameters) equivalence relations on Polish spaces (think of the reals) #12;Equivalence
Cross-layer design of wideband CDMA systems and cooperative diversity for wireless ad hoc networks :
Annavajjala, Ramesh
2006-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)Ph. D. , Electrical Engineering (Communication Theory andin Electrical Engineering (Communication Theory and Systems)
Optimizing symbol timing, frequency spacing, and SNR estimation for communication systems
Das, Aniruddha
in Electrical Engineering (Communication Theory and Systems)in Electrical Engineering (Communication Theory and Systems)Philosophy, Electrical Engineering (Communica- tions Theory
Hamilton-Jacobi theory in multisymplectic classical field theories
Manuel de León; Pedro Daniel Prieto-Martínez; Narciso Román-Roy; Silvia Vilariño
2015-04-08T23:59:59.000Z
The geometric framework for the Hamilton-Jacobi theory developed in previous works is extended for multisymplectic first-order classical field theories. The Hamilton-Jacobi problem is stated for the Lagrangian and the Hamiltonian formalisms of these theories as a particular case of a more general problem, and the classical Hamilton-Jacobi equation for field theories is recovered from this geometrical setting. Particular and complete solutions to these problems are defined and characterized in several equivalent ways in both formalisms, and the equivalence between them is proved. The use of distributions in jet bundles that represent the solutions to the field equations is the fundamental tool in this formulation. Some examples are analyzed and, in particular, the Hamilton-Jacobi equation for non-autonomous mechanical systems is obtained as a special case of our results.
SYSTEMS BIOLOGY Accurate information transmission
Tsimring, Lev S.
SYSTEMS BIOLOGY Accurate information transmission through dynamic biochemical signaling networks) and variability in cellular states (extrinsic noise) degrade information transmitted through signaling networks-induced information loss. In the extracellular signalregulated kinase (ERK), calcium (Ca2+ ), and nuclear factor
Altafini, Claudio
for Advanced Studies), Trieste. e-mail: altafini@sissa.it Aim: Bilinear Systems are an important class
Dmitriy Palatnik
2005-08-12T23:59:59.000Z
Suggested modification of the Einstein-Maxwell system, such that Maxwell equations become non-gauge and nonlinear. The theory is based on assumption that observable (i.e., felt by particles) metric is $ {\\tilde{g}}_{ab} = g_{ab} - l^2{A}_a{A}_b$, where $g_{ab}$ is metric (found from Einstein equations), $A_a$ is electromagnetic potential, and $l$ is fundamental constant of the theory. Specific model of the mass and charge densities of a fundamental particle is considered. As a result, one obtains solutions corresponding to quantized electrical charge with spectrum $q_{n} = {{2n}\\over3}e$ and $q'_{n} = -{(2n+1)\\over3}e$, where $n = 0, 1, 2, ...$ Theory predicts Coulomb interaction between electrical charges and masses. Namely, if ($m, e$) and ($m',e'$) describe masses and electrical charges of two particles respectively, then energy of interaction (in non-relativistic limit) is $V(r) = [ee' - kmm' - \\sqrt k(em' + e'm)]/r$. It follows, then, that the Earth's mass, $M_E$, contributes negative electrical charge, $Q_E = - \\sqrt k M_E$, which explains why primary cosmic rays consist mainly of positively charged particles. One may attribute the fairweather electric field at the Earth's surface to the charge $Q_E$.
Cross Layer Resource Allocation For Multiple User Video Communication Systems /
Wang, Dawei
2013-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)M.S. , in Electrical Engineering (Communication Theory andPh. D. in Electrical Engineering (Communication Theory and
Feedback communication systems : fundamental limits and control-theoretic approach
Ardestanizadeh, Ehsan
2010-01-01T23:59:59.000Z
M. S. in Electrical Engineering (Communication Theory andPh. D. in Electrical Engineering (Communication Theory andin Electrical Engineering (Communication Theory and Systems)
Ramakrishnan Iyer; Clifford V. Johnson; Jeffrey S. Pennington
2010-02-05T23:59:59.000Z
We uncover a remarkable role that an infinite hierarchy of non-linear differential equations plays in organizing and connecting certain {hat c}<1 string theories non-perturbatively. We are able to embed the type 0A and 0B (A,A) minimal string theories into this single framework. The string theories arise as special limits of a rich system of equations underpinned by an integrable system known as the dispersive water wave hierarchy. We observe that there are several other string-like limits of the system, and conjecture that some of them are type IIA and IIB (A,D) minimal string backgrounds. We explain how these and several string-like special points arise and are connected. In some cases, the framework endows the theories with a non-perturbative definition for the first time. Notably, we discover that the Painleve IV equation plays a key role in organizing the string theory physics, joining its siblings, Painleve I and II, whose roles have previously been identified in this minimal string context.
Electromagnetic Theory 1 /56 Electromagnetic Theory
Bicknell, Geoff
Electromagnetic Theory 1 /56 Electromagnetic Theory Summary: · Maxwell's equations · EM Potentials · Equations of motion of particles in electromagnetic fields · Green's functions · Lienard-Weichert potentials · Spectral distribution of electromagnetic energy from an arbitrarily moving charge #12;Electromagnetic
Composite Photon Theory Versus Elementary Photon Theory
Walton A. Perkins
2015-03-02T23:59:59.000Z
The purpose of this paper is to show that the composite photon theory measures up well against the Standard Model's elementary photon theory. This is done by comparing the two theories area by area. Although the predictions of quantum electrodynamics are in excellent agreement with experiment (as in the anomalous magnetic moment of the electron), there are some problems, such as the difficulty in describing the electromagnetic field with the four-component vector potential because the photon has only two polarization states. In most areas the two theories give similar results, so it is impossible to rule out the composite photon theory. Pryce's arguments in 1938 against a composite photon theory are shown to be invalid or irrelevant. Recently, it has been realized that in the composite theory the antiphoton does not interact with matter because it is formed of a neutrino and an antineutrino with the wrong helicity. This leads to experimental tests that can determine which theory is correct.
Appropriating Theory Bonnie Nardi
Nardi, Bonnie
Appropriating Theory Bonnie Nardi forthcoming in D. Sonnenwald, ed. Theory Development in Information: Reflecting on the Process. Austin in this volume concern the development of new theory. I want to take a slightly
LATTICE GAUGE THEORY 1 Lattice Gauge Theory
Creutz, Michael
a crucial tool for the quantum field the- orist. Applied to the formalism of lattice gauge theory, numerical simulations are providing fundamental quantitative information about the interactions of quarksLATTICE GAUGE THEORY 1 Lattice Gauge Theory Michael Creutz Supercomputers have recently become
Motorcycle Emissions System Multireflection Optics for non-
Denver, University of
Motorcycle Emissions System Multireflection Optics for non- contact measurement of small emissions-2580 FAX 2587 · e-mail dstedman @ DU.edu · www.feat.biochem.du.edu #12;End view of six-pass optical system #12;#12;#12;#12;Side view of ramp and optics #12;#12;#12;Motorcycle Emissions · Measurement of 90cc
John H. Schwarz
1998-09-01T23:59:59.000Z
Superstring theory, and a recent extension called M theory, are leading candidates for a quantum theory that unifies gravity with the other forces. As such, they are certainly not ordinary quantum field theories. However, recent duality conjectures suggest that a more complete definition of these theories can be provided by the large N limits of suitably chosen U(N) gauge theories associated to the asymptotic boundary of spacetime.
Hoshi, T; Fujiwara, T; Sogabe, T; Zhang, S -L
2012-01-01T23:59:59.000Z
A linear-algebraic theory called 'multiple Arnoldi method' is presented and realizes large-scale (order-N) electronic structure calculation with generalized eigen-value equations. A set of linear equations, in the form of (zS-H) x = b, are solved simultaneously with multiple Krylov subspaces. The method is implemented in a simulation package ELSES (http://www.elses.jp) with tight-binding-form Hamiltonians. A finite-temperature molecular dynamics simulation is carried out for metallic and insulating materials. A calculation with $10^7$ atoms was realized by a workstation. The parallel efficiency is shown upto 1,024 CPU cores.
Quantum Optimal Control Theory
G. H. Gadiyar
1994-05-10T23:59:59.000Z
The possibility of control of phenomena at microscopic level compatible with quantum mechanics and quantum field theory is outlined. The theory could be used in nanotechnology.
BNL | CFN: Theory & Computation
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Theory and Computation Contact: Mark Hybertsen Advances in theory, numerical algorithms and computational capabilities have enabled an unprecedented opportunity for fundamental...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Dark Matter Theory Dark Matter Theory Understanding discoveries at the Energy, Intensity, and Cosmic Frontiers Get Expertise Rajan Gupta (505) 667-7664 Email Bruce Carlsten (505)...
Setser, Jeremy Wayne
2014-01-01T23:59:59.000Z
Chemical reactions allow biological systems to function. The majority of these biochemical reactions occur due to the work of protein catalysts known as enzymes. These biocatalysts are often thought of as pre-formed, static ...
Chen, Guan-Jong, 1981-
2004-01-01T23:59:59.000Z
Design and fabrication of a microfluidics system capable of generating reproducible and controlled micro-biochemical environments that can be used as a diagnostic assay and microreactor is important. Here, a simple technique ...
Handheld 2-channel impedimetric cell counting system with embedded real-time processing
Rottigni, A.
Lab-on-a-chip systems have been attracting a growing attention for the perspective of miniaturization and portability of bio-chemical assays. Here we present a the design and characterization of a miniaturized, USB-powered, ...
Novel RF/Microwave Circuits And Systems for Lab on-Chip/on-Board Chemical Sensors
Abbas Mohamed Helmy, Ahmed M
2013-08-02T23:59:59.000Z
Recent research focuses on expanding the use of RF/Microwave circuits and systems to include multi-disciplinary applications. One example is the detection of the dielectric properties of chemicals and bio-chemicals at ...
Generalized Probability Theories: What determines the structure of quantum theory?
Peter Janotta; Haye Hinrichsen
2014-08-13T23:59:59.000Z
The framework of generalized probabilistic theories is a powerful tool for studying the foundations of quantum physics. It provides the basis for a variety of recent findings that significantly improve our understanding of the rich physical structure of quantum theory. This review paper tries to present the framework and recent results to a broader readership in an accessible manner. To achieve this, we follow a constructive approach. Starting from few basic physically motivated assumptions we show how a given set of observations can be manifested in an operational theory. Furthermore, we characterize consistency conditions limiting the range of possible extensions. In this framework classical and quantum theory appear as special cases, and the aim is to understand what distinguishes quantum mechanics as the fundamental theory realized in nature. It turns out non-classical features of single systems can equivalently result from higher dimensional classical theories that have been restricted. Entanglement and non-locality, however, are shown to be genuine non-classical features.
Techno-Economic Analysis of Bioconversion of Methane into Biofuel and Biochemical (Poster)
Fei, Q.; Tao, L.; Pienkos, P .T.; Guarnieri, M.; Palou-Rivera, I.
2014-10-01T23:59:59.000Z
In light of the relatively low price of natural gas and increasing demands of liquid transportation fuels and high-value chemicals, attention has begun to turn to novel biocatalyst for conversion of methane (CH4) into biofuels and biochemicals [1]. A techno-economic analysis (TEA) was performed for an integrated biorefinery process using biological conversion of methane, such as carbon yield, process efficiency, productivity (both lipid and acid), natural gas and other raw material prices, etc. This analysis is aimed to identify research challenges as well provide guidance for technology development.
Weiss, Taylor Leigh
2012-10-19T23:59:59.000Z
1930; Blackburn 1936). Though it would be at least another three decades before newer techniques would be used to address the many 5 unconventional biochemical traits of B. braunii (Maxwell et al. 1968; Knights et al. 1970), after more than a...; Lupi et al. 1991, 1994). Internally, colonies are held together by an extracellular matrix (ECM) composed of a cross-linked aldehyde polymer core (Fig. 2; Maxwell et al. 1968; Knights et al. 1970; Metzger et al. 1993, 2008). B. braunii is a...
Reformulating and Reconstructing Quantum Theory
Lucien Hardy
2011-08-25T23:59:59.000Z
We provide a reformulation of finite dimensional quantum theory in the circuit framework in terms of mathematical axioms, and a reconstruction of quantum theory from operational postulates. The mathematical axioms for quantum theory are the following: [Axiom 1] Operations correspond to operators. [Axiom 2] Every complete set of physical operators corresponds to a complete set of operations. The following operational postulates are shown to be equivalent to these mathematical axioms: [P1] Sharpness. Associated with any given pure state is a unique maximal effect giving probability equal to one. This maximal effect does not give probability equal to one for any other pure state. [P2] Information locality. A maximal measurement on a composite system is effected if we perform maximal measurements on each of the components. [P3] Tomographic locality. The state of a composite system can be determined from the statistics collected by making measurements on the components. [P4] Compound permutability. There exists a compound reversible transformation on any system effecting any given permutation of any given maximal set of distinguishable states for that system. [P5] Sturdiness. Filters are non-flattening. Hence, from these postulates we can reconstruct all the usual features of quantum theory: States are represented by positive operators, transformations by completely positive trace non-increasing maps, and effects by positive operators. The Born rule (i.e. the trace rule) for calculating probabilitieso follows. A more detailed abstract is provided in the paper.
Washington Taylor
2006-06-28T23:59:59.000Z
This elementary introduction to string field theory highlights the features and the limitations of this approach to quantum gravity as it is currently understood. String field theory is a formulation of string theory as a field theory in space-time with an infinite number of massive fields. Although existing constructions of string field theory require expanding around a fixed choice of space-time background, the theory is in principle background-independent, in the sense that different backgrounds can be realized as different field configurations in the theory. String field theory is the only string formalism developed so far which, in principle, has the potential to systematically address questions involving multiple asymptotically distinct string backgrounds. Thus, although it is not yet well defined as a quantum theory, string field theory may eventually be helpful for understanding questions related to cosmology in string theory.
Couzin, Iain D.
for cooperative control of engineered multi-agent systems. For instance, a continuous model of particles moving at constant speed in the plane with steering control (heading rate) designed to couple the dynamics Abstract-- We present a low-dimensional, continuous model of a multi-agent system motivated by simulation
Dobson, Ian
technology of flexible ac transmission [9], [ll], [19]. Detailed systems studies of the effect of these devices on the power system use network models consisting of linear RLC elements, ideal thyristors and periodic sources. Applications include high power thyristor controlled reactor and bridge rectifier
Extention cohomological fields theories and noncommutative Frobenius manifolds
S. M. Natanzon
2005-10-04T23:59:59.000Z
We construct some extension ({\\it Stable Field Theory}) of Cohomological Field Theory. The Stable Field Theory is a system of homomorphisms to some vector spaces generated by spheres and disks with punctures. It is described by a formal tensor series, satisfying to some system of "differential equations". In points of convergence the tensor series generate special noncommutative analogues of Frobenius algebras, describing 'Open-Closed' Topological Field Theories.
Bevir, Mark
2013-01-01T23:59:59.000Z
direct interference. Proponents of governability theory stress the resources the state has at its disposal
Introduction to Information Theory
Belohlavek, Radim
Introduction to Information Theory and Its Applications Radim Belohl´avek Dept. Computer Science providing introduction to Information Theory. Radim Belohl´avek, Introduction to Information Theory and Its Applications 1 #12;Information Theory: What and Why · information: one of key terms in our society
Zhang, Shuzhong
Introduction Theory of CAMNS Practical realization of CAMNS Simulation results & Conclusions Blind Separation of Non-negative Sources using Convex Analysis: Theory and Methods Wing-Kin (Ken) Ma Dept Blind Separation of Non-negative Sources using Convex Analysis: Theory and #12;Introduction Theory
Introduction Classical Field Theory
Baer, Christian
Introduction Classical Field Theory Locally Covariant Quantum Field Theory Renormalization Time evolution Conclusions and outlook Locality and Algebraic Structures in Field Theory Klaus Fredenhagen IIÂ¨utsch and Pedro Lauridsen Ribeiro) Klaus Fredenhagen Locality and Algebraic Structures in Field Theory #12
V.3K(1)-Local Homotopy Theory, Iwasawa Theory
V.3K(1)-Local Homotopy Theory, Iwasawa Theory and Algebraic K-Theory Stephen A. Mitchell* 3.3 K(1)-local Homotopy Theory............................................................. 965 -Adic K-Theory ................................................................. 968 K(1)-Localization
Nonlinear response theory in chemical kinetics
Kryvohuz, M; Mukamel, S
2014-01-01T23:59:59.000Z
?D(t) are D 0 (t) = (1) Chemical reactions, N h i ( x , t) iOF NONLINEAR RESPONSE THEORY TO CHEMICAL KINETICS Equation (non- linear responses of chemical systems to perturbations
Measuring student learning with item response theory
Lee, Young-Jin; Palazzo, David J.; Warnakulasooriya, Rasil; Pritchard, David E.
2008-01-01T23:59:59.000Z
We investigate short-term learning from hints and feedback in a Web-based physics tutoring system. Both the skill of students and the difficulty and discrimination of items were determined by applying item response theory ...
Testing Gravity Theories Using Stars
Jeremy Sakstein; Bhuvnesh Jain; Vinu Vikram
2014-09-12T23:59:59.000Z
Modified theories of gravity have received a renewed interest due to their ability to account for the cosmic acceleration. In order to satisfy the solar system tests of gravity, these theories need to include a screening mechanism that hides the modifications on small scales. One popular and well-studied theory is chameleon gravity. Our own galaxy is necessarily screened, but less dense dwarf galaxies may be unscreened and their constituent stars can exhibit novel features. In particular, unscreened stars are brighter, hotter and more ephemeral than screened stars in our own galaxy. They also pulsate with a shorter period. In this essay, we exploit these new features to constrain chameleon gravity to levels three orders of magnitude lower the previous measurements. These constraints are currently the strongest in the literature.
Complex biological and bio-inspired systems
Ecke, Robert E [Los Alamos National Laboratory
2009-01-01T23:59:59.000Z
The understanding and characterization ofthe fundamental processes of the function of biological systems underpins many of the important challenges facing American society, from the pathology of infectious disease and the efficacy ofvaccines, to the development of materials that mimic biological functionality and deliver exceptional and novel structural and dynamic properties. These problems are fundamentally complex, involving many interacting components and poorly understood bio-chemical kinetics. We use the basic science of statistical physics, kinetic theory, cellular bio-chemistry, soft-matter physics, and information science to develop cell level models and explore the use ofbiomimetic materials. This project seeks to determine how cell level processes, such as response to mechanical stresses, chemical constituents and related gradients, and other cell signaling mechanisms, integrate and combine to create a functioning organism. The research focuses on the basic physical processes that take place at different levels ofthe biological organism: the basic role of molecular and chemical interactions are investigated, the dynamics of the DNA-molecule and its phylogenetic role are examined and the regulatory networks of complex biochemical processes are modeled. These efforts may lead to early warning algorithms ofpathogen outbreaks, new bio-sensors to detect hazards from pathomic viruses to chemical contaminants. Other potential applications include the development of efficient bio-fuel alternative-energy processes and the exploration ofnovel materials for energy usages. Finally, we use the notion of 'coarse-graining,' which is a method for averaging over less important degrees of freedom to develop computational models to predict cell function and systems-level response to disease, chemical stress, or biological pathomic agents. This project supports Energy Security, Threat Reduction, and the missions of the DOE Office of Science through its efforts to accurately model biological systems at the molecular and cellular level. The project's impact encompasses applications to biofuels, to novel sensors and to materials with broad use for energy or threat reduction. The broad, interdisciplinary approach of CNLS offers the unparalleled strength of combining science backgrounds and expertise -a unique and important asset in attacking the complex science of biological organisms. This approach also allows crossfertilization, with concepts and techniques transferring across field boundaries.
Izhikevich, Eugene
, FEBRUARY 2001 133 Synchronization of MEMS Resonators and Mechanical Neurocomputing Frank C. Hoppensteadt: microelectromechanical systems (MEMS) and neu- rocomputing. First, we consider MEMS oscillators having low amplitude. Then, we investigate a theoretical possibility of using MEMS oscillators to build an oscillatory
Bazant, Martin Z.
energy storage (EES) systems with high energy and power density will require the development of a full breakthroughs. Although chemical energy storage (batteries) and ECs share common components such as electrodes the research directions for each are presented separately. Chemical Energy Storage Storage of electrical charge
Cohen, Doron
-equilibrium steady state (NESS) of a ring that is coupled to a thermal bath, and is driven by an external hot source to glassy systems. Conse- quently there is a wide range of driving intensities where the NESS is like- equilibrium steady state (NESS). Considering the NESS of a mesoscopically glassy sys- tem, our working
Quantum Optimal Control Theory
J. Werschnik; E. K. U. Gross
2007-07-12T23:59:59.000Z
The control of quantum dynamics via specially tailored laser pulses is a long-standing goal in physics and chemistry. Partly, this dream has come true, as sophisticated pulse shaping experiments allow to coherently control product ratios of chemical reactions. The theoretical design of the laser pulse to transfer an initial state to a given final state can be achieved with the help of quantum optimal control theory (QOCT). This tutorial provides an introduction to QOCT. It shows how the control equations defining such an optimal pulse follow from the variation of a properly defined functional. We explain the most successful schemes to solve these control equations and show how to incorporate additional constraints in the pulse design. The algorithms are then applied to simple quantum systems and the obtained pulses are analyzed. Besides the traditional final-time control methods, the tutorial also presents an algorithm and an example to handle time-dependent control targets.
Parameterized post-Newtonian limit of Horndeski's gravity theory
Manuel Hohmann
2015-08-20T23:59:59.000Z
We present a recent result on the parameterized post-Newtonian (PPN) limit of Horndeski's gravity theory and its consistency with solar system observations.
Ghirardi, M.; Svedruzic, D.
2013-07-01T23:59:59.000Z
The proposed research attempted to identify novel biochemical catalysts, catalyst support materials, high-efficiency electron transfer agents between catalyst active sites and electrodes, and solid-phase electrolytes in order to maximize the current density of biochemical fuel cells that utilize various alcohols as substrates.
Gleeson, Joseph G.
Biochemical Journal Immediate Publication. Published on 23 Nov 2010 as manuscript BJ20101691 with prior permission and as allowed by law. © 2010 The Authors Journal compilation © 2010 Portland Press Limited #12;Biochemical Journal Immediate Publication. Published on 23 Nov 2010 as manuscript BJ20101691
Phelps, Michael E.
2009-09-01T23:59:59.000Z
Radiotracer techniques are used in environmental sciences, geology, biology and medicine. Radiotracers with Positron Emission Tomography (PET) provided biological examinations of ~3 million patients 2008. Despite the success of positron labeled tracers in many sciences, there is limited access in an affordable and convenient manner to develop and use new tracers. Integrated microfluidic chips are a new technology well matched to the concentrations of tracers. Our goal is to develop microfluidic chips and new synthesis approaches to enable wide dissemination of diverse types of tracers at low cost, and to produce new generations of radiochemists for which there are many unfilled jobs. The program objectives are to: 1. Develop an integrated microfluidic platform technology for synthesizing and 18F-labeling diverse arrays of different classes of molecules. 2. Incorporate microfluidic chips into small PC controlled devices (“Synthesizer”) with a platform interfaced to PC for electronic and fluid input/out control. 3. Establish a de-centralized model with Synthesizers for discovering and producing molecular imaging probes, only requiring delivery of inexpensive [18F]fluoride ion from commercial PET radiopharmacies vs the centralized approach of cyclotron facilities synthesizing and shipping a few different types of 18F-probes. 4. Develop a position sensitive avalanche photo diode (PSAPD) camera for beta particles embedded in a microfluidic chip for imaging and measuring transport and biochemical reaction rates to valid new 18F-labeled probes in an array of cell cultures. These objectives are met within a research and educational program integrating radio-chemistry, synthetic chemistry, biochemistry, engineering and biology in the Crump Institute for Molecular Imaging. The Radiochemistry Training Program exposes PhD and post doctoral students to molecular imaging in vitro in cells and microorganisms in microfluidic chips and in vivo with PET, from new technologies for radiochemistry (macro to micro levels), biochemistry and biology to imaging principles, tracer kinetics, pharmacokinetics and biochemical assays. New generations of radiochemists will be immersed in the biochemistry and biology for which their labeled probes are being developed for assays of these processes. In this program engineers and radio-chemists integrate the principles of microfluidics and radiolabeling along with proper system design and chemistry rule sets to yield Synthesizers enabling biological and pharmaceutical scientists to develop diverse arrays of probes to pursue their interests. This progression would allow also radiochemists to focus on the further evolution of rapid, high yield synthetic reactions with new enabling technologies, rather than everyday production of radiotracers that should be done by technologists. The invention of integrated circuits in electronics established a platform technology that allowed an evolution of ideas and applications far beyond what could have been imagined at the beginning. Rather than provide a technology for the solution to a single problem, it is hoped that microfluidic radiochemistry will be an enabling platform technology for others to solve many problems. As part of this objective, another program goal is to commercialize the technologies that come from this work so that they can be provided to others who wish to use it.
Physico-chemical and Bio-chemical Controls on Soil C Saturation Behavior
Six, Johan; Plante, Alain
2011-06-02T23:59:59.000Z
In this project, we tested through a multitude of lab and field experiments the concept of soil C stabilization and determined metrics for the level of C saturation across soils and soil organic matter fractions. The basic premise of the soil C saturation concept is that there is a maximum amount of C that can be stabilized within a soil, even when C input is further increased. In a first analysis, our results showed that linear regression models do not adequately predict maximal organic C stabilization by fine soil particles. Soil physical and chemical properties associated with soil clay mineralogy, such as specific surface area and organic C loading, should be incorporated into models for predicting maximal organic C stabilization. In a second analysis, we found significantly greater maximal C stabilization in the microaggregate-protected versus the non-microaggregate protected mineral fractions, which provides independent validation that microaggregation plays an important role in increasing the protection and stabilization of soil C leading to greater total soil C accumulation in these pools. In a third study, our results question the role of biochemical preference in mineral C stabilization and of the chemical recalcitrance of specific plant-derived compounds in non-protected soil C accumulation. Because C biochemical composition of slowly turning over mineral protected C pools does not change with C saturation, input C composition is unlikely to affect long-term C stabilization. Rather, C saturation and stabilization in soil is controlled only by the quantity of C input to the soil and the physical and chemical protection mechanisms at play in long-term C stabilization. In conclusion, we have further corroborated the concept of soil C saturation and elucidated several mechanisms underlying this soil C saturation.
Control Theory on Lie Groups Yuri L. Sachkov
Wagner, Stephan
Control Theory on Lie Groups Yuri L. Sachkov Program Systems Institute Russian Academy of Sciences on control theory on Lie groups. Controllability and optimal control for left-invariant problems on Lie for graduate students, no preliminary knowledge of control theory or Lie groups is assumed. SISSA 15/2006/M
Descriptive Control Theory (student & postdoc, 2007 to next Friday)
Clarke, Edmund M.
Descriptive Control Theory Sicun Gao (student & postdoc, 2007 to next Friday) #12;Thank you, Ed] #12;We need a logical and computational "overhaul" of control theory that sets the foundation-critical systems. #12;Descriptive control theory aims to study Â· Computational complexity Â· Automated reasoning
Feasibility of Organizations -A Refinement of Chemical Organization Theory
Hinze, Thomas
Feasibility of Organizations - A Refinement of Chemical Organization Theory with Application to P a theorem providing a criteria for an unfeasible organization. This is a refinement of organization theory organization. Key words: reaction networks, constructive dynamical systems, chem- ical organization theory
Generalized Quantum Theory and Mathematical Foundations of Quantum Field Theory
Maroun, Michael Anthony
2013-01-01T23:59:59.000Z
The Unique Status of Condensed Matter Theory . . . . . . . .of a Satisfactory Theory . . . . . . . . . . . . BasicThe Generalized Quantum Theory The Postulates and Philosophy
Eur. J. Biochem. 85, 529-534 (1978) X-Ray and Neutron Small-Angle Scattering Studies
1978-01-01T23:59:59.000Z
Eur. J. Biochem. 85, 529-534 (1978) X-Ray and Neutron Small-Angle Scattering Studies of the Complex-ray and neutron scattering techniques. In this work, we concentrated mainly on radius of gyration analyses and a neutron scattering experiment is performed in 21-Iz0 solvent. This decrease simply reflects the fact
Scott, John D.
2012-01-01T23:59:59.000Z
, are less frequently induced by heat stress, and several family members, such as Hsp27 and B210 Biochemical Society Transactions (2012) Volume 40, part 1 PKA phosphorylation of the small heat The small heat-shock protein Hsp20 (heat-shock protein 20), also known as HspB6, has been shown to protect
Pike, Linda J.
1959-01-01T23:59:59.000Z
Neutral Lipid Extraction by the Method of Bligh-Dyer (Bligh and Dyer, Can. J. Biochem. Physiol. 37 for 1 min at low speed. 5. Remove top layer and transfer to a new glass tube. Add 1 ml CHCl3 and re-extract as above by vortexing and phase separation. 6. Aspirate the top layer from this second extraction
Tom Banks
1999-11-10T23:59:59.000Z
This is a series of lectures on M Theory for cosmologists. After summarizing some of the main properties of M Theory and its dualities I show how it can be used to address various fundamental and phenomenological issues in cosmology.
Henderson, Leah
2010-01-01T23:59:59.000Z
This thesis consists of three papers on the nature of scientific theories and inference. In many cases, scientific theories can be regarded as organized into hierarchies, with higher levels sometimes called 'paradigms', ...
Covariant Noncommutative Field Theory
Estrada-Jimenez, S. [Licenciaturas en Fisica y en Matematicas, Facultad de Ingenieria, Universidad Autonoma de Chiapas Calle 4a Ote. Nte. 1428, Tuxtla Gutierrez, Chiapas (Mexico); Garcia-Compean, H. [Departamento de Fisica, Centro de Investigacion y de Estudios Avanzados del IPN P.O. Box 14-740, 07000 Mexico D.F., Mexico and Centro de Investigacion y de Estudios Avanzados del IPN, Unidad Monterrey Via del Conocimiento 201, Parque de Investigacion e Innovacion Tecnologica (PIIT) Autopista nueva al Aeropuerto km 9.5, Lote 1, Manzana 29, cp. 66600 Apodaca Nuevo Leon (Mexico); Obregon, O. [Instituto de Fisica de la Universidad de Guanajuato P.O. Box E-143, 37150 Leon Gto. (Mexico); Ramirez, C. [Facultad de Ciencias Fisico Matematicas, Universidad Autonoma de Puebla, P.O. Box 1364, 72000 Puebla (Mexico)
2008-07-02T23:59:59.000Z
The covariant approach to noncommutative field and gauge theories is revisited. In the process the formalism is applied to field theories invariant under diffeomorphisms. Local differentiable forms are defined in this context. The lagrangian and hamiltonian formalism is consistently introduced.
Topological quantum field theories
Albert Schwarz
2000-11-29T23:59:59.000Z
Following my plenary lecture on ICMP2000 I review my results concerning two closely related topics: topological quantum field theories and the problem of quantization of gauge theories. I start with old results (first examples of topological quantum field theories were constructed in my papers in late seventies) and I come to some new results, that were not published yet.
Toward a Theory of Information Processing Sinan Sinanovic and Don H. Johnson
theory and statistical signal processing. This preliminary theory com- plements classic information, by acting on signals, process information. We use information-theoretic distance measures, the Kullback a system's output and input quantifies the system's informationprocessing properties. Using this approach
Alternative analysis to perturbation theory
J. Martinez-Carranza; F. Soto-Eguibar; H. Moya-Cessa
2011-10-04T23:59:59.000Z
We develop an alternative approach to time independent perturbation theory in non-relativistic quantum mechanics. The method developed has the advantage to provide in one operation the correction to the energy and to the wave function, additionally we can analyze the time evolution of the system. To verify our results, we apply our method to the harmonic oscillator perturbed by a quadratic potential. An alternative form of the Dyson series, in matrix form instead of integral form, is also obtained.
Gauge theories on noncommutative spaces
Albert Schwarz
2000-11-29T23:59:59.000Z
I review my results about noncommutative gauge theories and about the relation of these theories to M(atrix) theory following my lecture on ICMP 2000.
Higher Auslander-Reiten Theory
West, Jacob
2015-01-01T23:59:59.000Z
Linearly Com- pact Rings. Applications. , Category Theory,Homology Theory and their Applications II. Lecture Notes in1977), 519– , Representation Theory of Artin Algebras VI: A
Limit theory for overfit models
Calhoun, Grayson Ford
2009-01-01T23:59:59.000Z
theory. . . . . . . . . . . . . . . . . . . . . . . . .1.2 Asymptotic Theory and Main Results . . . . . . . . .Chapter 2 Limit theory for comparing over?t models out-of-
Review: Theories of Sustainable Development
Laberge, Yves
2015-01-01T23:59:59.000Z
Review: Theories of Sustainable Development Edited By JudithTheories of Sustainable Development. Abingdon: Routledge,Routledge Studies in Sustainable Development. Theories of
Theorizing Practice and Practicing Theory
Feldman, Martha S; Orlikowski, Wanda J
2011-01-01T23:59:59.000Z
Practice and Practicing Theory Organization Science 22(5),Practice and Practicing Theory Organization Science 22(5),Practice and Practicing Theory Organization Science 22(5),
Ward, Karen
Theory and Culture: Examination of organizational and management theories and research that guide Management Roles and Operations: This course focuses on theories and principles of leadership, administration, and management for mid-level managers in supervision and administration. Social changes and trends are discussed
II.2K-Theory and Intersection Theory
II.2K-Theory and Intersection Theory Henri Gillet 2.1 Introduction.3 K-Theory and Intersection Multiplicities ......................................... 253 Serre's tor Groups .............................................. 259 Higher Rational Equivalence and Milnor K-Theory
John H. Schwarz
1995-03-20T23:59:59.000Z
A brief review of the status of duality symmetries in string theory is presented. The evidence is accumulating rapidly that an enormous group of duality symmetries, including perturbative T dualities and non-perturbative S-dualities, underlies string theory. It is my hope that an understanding of these symmetries will suggest the right way to formulate non-perturbative string theory. Whether or not this hope is realized, it has already been demonstrated that this line of inquiry leads to powerful new tools for understanding gauge theories and new evidence for the uniqueness of string theory, as well as deep mathematical results.
The M-theory origin of global properties of gauge theories
Antonio Amariti; Claudius Klare; Domenico Orlando; Susanne Reffert
2015-07-16T23:59:59.000Z
We show that global properties of gauge groups can be understood as geometric properties in M-theory. Different wrappings of a system of N M5-branes on a torus reduce to four-dimensional theories with $A_{N-1}$ gauge algebra and different unitary groups. The classical properties of the wrappings determine the global properties of the gauge theories without the need to impose any quantum conditions. We count the inequivalent wrappings as they fall into orbits of the modular group of the torus, which correspond to the S-duality orbits of the gauge theories.
Ding-Yu Chung; Volodymyr Krasnoholovets
2005-12-05T23:59:59.000Z
We present the cosmic organism theory in which all visible and invisible matter has different cosmic genetic expressions. The cosmic gene includes codes for the object structure and the space structure. The cosmic digital code for the object structure consists of full object (1, 2, and 3 for particle, string, and membrane, respectively) and empty object (0) as anti de Sitter space (AdS). The tessellation lattice of empty objects is tessellattice. The decomposition of a full object in tessellattice results in the AdS/CFT (conformal field theory) duality. The digital code for the object structure accounts for the AdS/CFT duality, the dS/bulk duality, and gravity. The digital code for the space structure consists of 1 and 0 for attachment space and detachment space, respectively. Attachment space attaches to object permanently at zero speed or reversibly at the speed of light. Detachment space detaches from the object irreversibly at the speed of light. The combination of attachment space and detachment space results in miscible space, binary lattice space or binary partition space. Miscible space represents special relativity. Binary lattice space consists of multiple quantized units of attachment space separated from one another by detachment space. Binary lattice space corresponds to the nilpotent universal computational rewrite system (NUCRS) by Diaz and Rowlands. The gauge force fields and wavefunction are in binary lattice space. With tessellattice and binary lattice space, 11D brane is reducing to 4D particle surrounded by gravity and the gauge force fields. The cosmic dimension varies due to different speeds of light in different dimensional space-times and the increase of mass.
Matlock, James 1958-
2012-12-01T23:59:59.000Z
capable of attending not only to the conjectural nature of futures studies, but a theory of understanding too. Scenario planning is a multilevel topic involving individuals, dyads, and teams within and between social performance systems. The established...
Battenfeld, Ingo
2008-01-01T23:59:59.000Z
This thesis presents Topological Domain Theory as a powerful and flexible framework for denotational semantics. Topological Domain Theory models a wide range of type constructions and can interpret many computational features. Furthermore, it has...We begin by describing the categories of Topological Domain Theory, and their categorical structure. In particular, we recover the basic constructions of domain theory, such as products, function spaces, fixed points and recursive types, in the context of Topological Domain Theory....As a central contribution, we give a detailed account of how computational effects can be modelled in Topological Domain Theory. Following recent work of Plotkin and Power, who proposed to construct effect monads via free algebra functors, this is done by showing that free algebras for a large class of parametrised equational theories exist in Topological Domain Theory. These parametrised equational theories are expressive enough to generate most of the standard examples of effect monads. Moreover, the free algebras in Topological Domain Theory are obtained by an explicit inductive construction, using only basic topological and set-theoretical principles....We also give a comparison of Topological and Classical Domain Theory. The category of omega-continuous dcpos embeds into Topological Domain Theory, and we prove that this embedding preserves the basic domain-theoretic constructions in most cases. We show that the classical powerdomain constructions on omega-continuous dcpos, including the probabilistic powerdomain, can be recovered in Topological Domain Theory....Finally, we give a synthetic account of Topological Domain Theory. We show that Topological Domain Theory is a specific model of Synthetic Domain Theory in the realizability topos over Scott's graph model. We give internal characterisations of the categories of Topological Domain Theory in this realizability topos, and prove the corresponding categories to be internally complete and weakly small. This enables us to show that Topological Domain Theory can model the polymorphic lambda-calculus, and to obtain a richer collection of free algebras than those constructed earlier....In summary, this thesis shows that Topological Domain Theory supports a wide range of semantic constructions, including the standard domain-theoretic constructions, computational effects and polymorphism, all within a single setting....
Magnetism Theory Group / POSTECH Magnetism Theory Group / POSTECH
Min, Byung Il
Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH J.H . Park et al. #12;'s of FeinCsm e tal The chargeandorbitalordering geom etryin YB a C o 2 O 5 S. K. Kwon etal .Magnetism Theory
Mesoscopic theory of the viscoelasticity of polymers
S. M. Chitanvis
1999-01-26T23:59:59.000Z
We have advanced our previous static theory of polymer entanglement involving an extended Cahn-Hilliard functional, to include time-dependent dynamics. We go beyond the Gaussian approximation, to the one-loop level, to compute the frequency dependent storage and loss moduli of the system. The three parameters in our theory are obtained by fitting to available experimental data on polystyrene melts of various chain lengths. This provides a physical representation of the parameters in terms of the chain length of the system. We discuss the importance of the various terms in our energy functional with respect to their contribution to the viscoelastic response of the polymeric system.
Robin, C; Arteaga, D Peña; Berger, J -F
2015-01-01T23:59:59.000Z
Although self-consistent multi-configuration methods have been used for decades to address the description of atomic and molecular many-body systems, only a few trials have been made in the context of nuclear structure. This work aims at the development of such an approach to describe in a unified way various types of correlations in nuclei, in a self-consistent manner where the mean-field is improved as correlations are introduced. The goal is to reconcile the usually set apart Shell-Model and Self-Consistent Mean-Field methods. This approach is referred as "variational multiparticle-multihole configuration mixing method". It is based on a double variational principle which yields a set of two coupled equations that determine at the same time the expansion coefficients of the many-body wave function and the single particle states. The formalism is derived and discussed in a general context, starting from a three-body Hamiltonian. Links to existing many-body techniques such as the formalism of Green's functio...
Electric dipole moments in supersymmetric theories
Andrea Romanino
1996-04-19T23:59:59.000Z
Intrinsic EDMs in microscopic systems at a level of sensitivity achievable in experiments under way or foreseen are predicted in supersymmetric unified theories. I describe this and other sources of measurable EDMs and I show how these sources can be distinguished through experiments in different systems.
Silver, Nathaniel White
2012-01-01T23:59:59.000Z
This thesis explores the use of ensemble, free energy models in the study and design of molecular, biochemical systems. We use physics based computational models to analyze the molecular basis of binding affinity in the ...
Buyyounouski, Mark K. [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States)]. E-mail: mark.buyyounouski@fccc.edu; Hanlon, Alexandra L. [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States); Eisenberg, Debra F. [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States); Horwitz, Eric M. [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States); Feigenberg, Steven J. [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States); Uzzo, Robert G. [Department of Surgical Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States); Pollack, Alan [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States)
2005-12-01T23:59:59.000Z
Purpose: To compare several characteristics of alternative definitions of biochemical failure (BF) in men with extended follow-up after radiotherapy (RT) with or with androgen deprivation therapy (ADT) for prostate cancer. Methods and Materials: From December 1, 1991, to April 30, 1998, 688 men with Stage T1c-T3NX-N0M0 prostate cancer received RT alone (n = 586) or RT plus ADT (n = 102) with a minimal follow-up of 4 years and five or more 'ADT-free' posttreatment prostate-specific antigen levels. BF was defined by three methods: (1) the ASTRO definition (three consecutive rises in prostate-specific antigen level); (2) a modified American Society for Therapeutic Radiology Oncology (ASTRO) definition requiring two additional consecutive rises when a decline immediately subsequent to three consecutive rises occurred; and (3) the 'Houston' or nadir plus 2-ng/mL definition (a rise of at least 2 ng/mL greater than the nadir). The sensitivity, specificity, positive predictive value, negative predictive value, and overall accuracy were determined for each using clinical progression as the endpoint. Furthermore, the misclassification rates for a steadily rising prostate-specific antigen level, ability to satisfy the proportional hazards (RT with or without ADT), effects of short follow-up, and intervals to the diagnosis of BF were compared. Results: The misclassification rate for BF using the nadir plus 2-ng/mL definition was 2% for RT alone and 0% for RT plus ADT compared with 0% and 0% for the modified ASTRO definition, and 5% and 23% for the ASTRO definition, respectively. The hazard rates for RT alone and RT plus ADT were proportional only for the nadir plus 2 ng/mL definition and seemingly unaffected by the length of follow-up. For RT with or without ADT, the nadir plus 2 ng/mL definition was the most specific (RT, 80% vs. RT plus ADT, 75%) with the greatest positive predictive value (RT, 36% vs. RT plus ADT, 25%) and overall accuracy (RT, 81% vs. RT plus ADT, 77%). A greater proportion of BF was diagnosed in the first 2 years of follow-up with the nadir plus 2 ng/mL definition compared with the ASTRO definition (13% vs. 5%, p = 0.0138, chi-square test). Conclusion: The nadir plus 2 ng/mL definition was the best predictor of sustained, true, biochemical, and clinical failure, and was not affected by the use of ADT or follow-up length.
C. Robin; N. Pillet; D. Peña Arteaga; J. -F. Berger
2015-09-29T23:59:59.000Z
Although self-consistent multi-configuration methods have been used for decades to address the description of atomic and molecular many-body systems, only a few trials have been made in the context of nuclear structure. This work aims at the development of such an approach to describe in a unified way various types of correlations in nuclei, in a self-consistent manner where the mean-field is improved as correlations are introduced. The goal is to reconcile the usually set apart Shell-Model and Self-Consistent Mean-Field methods. This approach is referred as "variational multiparticle-multihole configuration mixing method". It is based on a double variational principle which yields a set of two coupled equations that determine at the same time the expansion coefficients of the many-body wave function and the single particle states. The formalism is derived and discussed in a general context, starting from a three-body Hamiltonian. Links to existing many-body techniques such as the formalism of Green's functions are established. First applications are done using the two-body D1S Gogny effective force. The numerical procedure is tested on the $^{12}$C nucleus in order to study the convergence features of the algorithm in different contexts. Ground state properties as well as single-particle quantities are analyzed, and the description of the first $2^+$ state is examined. This study allows to validate our numerical algorithm and leads to encouraging results. In order to test the method further, we will realize in the second article of this serie, a systematic description of more nuclei and observables obtained by applying the newly-developed numerical procedure with the same Gogny force. As raised in the present work, applications of the variational multiparticle-multihole configuration mixing method will however ultimately require the use of an extended and more constrained Gogny force.
Noncommutative Dipole Field Theories
K. Dasgupta; M. M. Sheikh-Jabbari
2002-02-05T23:59:59.000Z
Assigning an intrinsic constant dipole moment to any field, we present a new kind of associative star product, the dipole star product, which was first introduced in [hep-th/0008030]. We develop the mathematics necessary to study the corresponding noncommutative dipole field theories. These theories are sensible non-local field theories with no IR/UV mixing. In addition we discuss that the Lorentz symmetry in these theories is ``softly'' broken and in some particular cases the CP (and even CPT) violation in these theories may become observable. We show that a non-trivial dipole extension of N=4, D=4 gauge theories can only be obtained if we break the SU(4) R (and hence super)-symmetry. Such noncommutative dipole extensions, which in the maximal supersymmetric cases are N=2 gauge theories with matter, can be embedded in string theory as the theories on D3-branes probing a smooth Taub-NUT space with three form fluxes turned on or alternatively by probing a space with R-symmetry twists. We show the equivalences between the two approaches and also discuss the M-theory realization.
Quantum feedback control and classical control theory
Andrew C. Doherty; Salman Habib; Kurt Jacobs; Hideo Mabuchi; Sze M. Tan
2000-03-09T23:59:59.000Z
We introduce and discuss the problem of quantum feedback control in the context of established formulations of classical control theory, examining conceptual analogies and essential differences. We describe the application of state-observer based control laws, familiar in classical control theory, to quantum systems and apply our methods to the particular case of switching the state of a particle in a double-well potential.
Chiral perturbation theory: a basic introduction
B. Moussallam
2004-09-01T23:59:59.000Z
Chiral perturbation theory is a very general expansion method which can be applied to any dynamical system which has continuous global symmetries and in which the ground state breaks some of these spontaneously. In these lectures we explain at a basic level and in detail how such symmetries are identified in the case of the QCD Lagrangian and describe the steps which are involved in practice in the construction of a low-energy effective theory for QCD.
Original research What was the programme theory of New Labour's
Birmingham, University of
Original research What was the programme theory of New Labour's Health System Reforms? Ross Millar The King's Fund, London, UK Objectives: To examine whether the Health System Reforms delivered the promise of being a coherent and mutually supporting reform programme; to identify the underlying programme theory
D-brane field theory on compact spaces
Washington Taylor
1996-11-07T23:59:59.000Z
We consider Dirichlet p-branes in type II string theory on a space which has been toroidally compactified in d dimensions. We give an explicit construction of the field theory description of this system by putting a countably infinite number of copies of each brane on the noncompact covering space, and modding out the resulting gauge theory by Z^d. The resulting theory is a gauge theory with graded fields corresponding to strings winding around the torus an arbitrary number of times. In accordance with T-duality, this theory is equivalent to the gauge theory for the dual system of (d + p)-branes wrapped around the compact directions, where the winding number is exchanged for momentum in the compact direction.
Monolithic piezoelectric sensor (MPS) for sensing chemical, biochemical and physical measurands
Andle, Jeffrey C. (Bangor, ME); Lec, Ryszard M. (Orono, ME)
2000-01-01T23:59:59.000Z
A piezoelectric sensor and assembly for measuring chemical, biochemical and physical measurands is disclosed. The piezoelectric sensor comprises a piezoelectric material, preferably a crystal, a common metal layer attached to the top surface of the piezoelectric crystal, and a pair of independent resonators placed in close proximity on the piezoelectric crystal such that an efficacious portion of acoustic energy couples between the resonators. The first independent resonator serves as an input port through which an input signal is converted into mechanical energy within the sensor and the second independent resonator serves an output port through which a filtered replica of the input signal is detected as an electrical signal. Both a time delay and an attenuation at a given frequency between the input signal and the filtered replica may be measured as a sensor output. The sensor may be integrated into an assembly with a series feedback oscillator and a radio frequency amplifier to process the desired sensor output. In the preferred embodiment of the invention, a selective film is disposed upon the grounded metal layer of the sensor and the resonators are encapsulated to isolate them from the measuring environment. In an alternative embodiment of the invention, more than two resonators are used in order to increase the resolution of the sensor.
Automated Lattice Perturbation Theory
Monahan, Christopher
2014-11-01T23:59:59.000Z
I review recent developments in automated lattice perturbation theory. Starting with an overview of lattice perturbation theory, I focus on the three automation packages currently "on the market": HiPPy/HPsrc, Pastor and PhySyCAl. I highlight some recent applications of these methods, particularly in B physics. In the final section I briefly discuss the related, but distinct, approach of numerical stochastic perturbation theory.
Theory Modeling and Simulation
Shlachter, Jack [Los Alamos National Laboratory
2012-08-23T23:59:59.000Z
Los Alamos has a long history in theory, modeling and simulation. We focus on multidisciplinary teams that tackle complex problems. Theory, modeling and simulation are tools to solve problems just like an NMR spectrometer, a gas chromatograph or an electron microscope. Problems should be used to define the theoretical tools needed and not the other way around. Best results occur when theory and experiments are working together in a team.
Stochastic optimization and its applications in time- varying wireless systems
Lin, Yih-Hao
2007-01-01T23:59:59.000Z
Processes with Applications to Stochastic Systems Theory (Signal Pro- cessing, Optimization, and Control).
Krokhin, Arkadii [Univ. of North Texas, Denton, TX (United States)
2014-04-18T23:59:59.000Z
New applications of the theory of homogenization for heterogeneous metamaterials, in particular for acoustic cloaking and for design and engineering of tunable phononic crystal.
*D. J. Kelleher
2011-09-30T23:59:59.000Z
Spectral Graph Theory. *D. J. Kelleher2. 2Department of Mathematics. University of Connecticut. UConn— SIGMA Seminar — Fall 2011. D. J. Kelleher. Spectral ...
Theory of Relaxor Ferroelectrics
Guzman-Verri, Gian Giacomo
2012-01-01T23:59:59.000Z
Theory of Thermal Neutron Scattering: the Use of Neutronsdetermined from neutron scattering. [39] A symmetry analysis9, 10] Only recently neutron scattering experiments have
Constructive Quantum Field Theory
Giovanni Gallavotti
2005-10-04T23:59:59.000Z
A review of the renormalization group approach to the proof of non perturbative ultraviolet stability in scalar field theories in dimension d=2,3.
Bevir, Mark
2013-01-01T23:59:59.000Z
Trentmann, “The Modern Genealogy of the Consumer: Meanings,2007. Biebricher, T. “Genealogy and Governmentality. ”of Political Theory: The Genealogy of an American Vocation.
Quantum Control and Representation Theory
A. Ibort; J. M. Pérez-Pardo
2012-03-11T23:59:59.000Z
A new notion of controllability for quantum systems that takes advantage of the linear superposition of quantum states is introduced. We call such notion von Neumann controllabilty and it is shown that it is strictly weaker than the usual notion of pure state and operator controlability. We provide a simple and effective characterization of it by using tools from the theory of unitary representations of Lie groups. In this sense we are able to approach the problem of control of quantum states from a new perspective, that of the theory of unitary representations of Lie groups. A few examples of physical interest and the particular instances of compact and nilpotent dynamical Lie groups are discussed.
Danger Theory: The Link between AIS and IDS?+ Uwe Aickelin1
Aickelin, Uwe
Danger Theory: The Link between AIS and IDS?+ Uwe Aickelin1 , Peter Bentley2 , Steve Cayzer_Cayzer@hplb.hpl.hp.com, Jungwon@dcs.kcl.ac.uk, Julie.Mcleod@uwe.ac.uk artificial immune system, intrusion detection, danger theory self-nonself thinking and a new `Danger Theory' (DT) is emerging. This new theory suggests
Arslan, Suayb S.
2012-01-01T23:59:59.000Z
in Electrical Engineering (Communication Theory and Systems)B. S. in Electrical Engineering (Communication Theory andM. S. in in Electrical Engineering (Communication Theory and
Reprinted from New Beer in an Old Bottle: Eduard Buchner and the Growth of Biochemical Knowledge is to be 67 #12;HERBERT FRIEDMANN master -- that's all." LEWIS CARROLL, Through the Looking Glass The words
PAT GRANDELLI, P.E.; GREG ROCHELEAU; JOHN HAMRICK, Ph.D.; MATT CHURCH, Ph.D.; BRIAN POWELL, Ph.D.
2012-09-29T23:59:59.000Z
This paper describes the modeling work by Makai Ocean Engineering, Inc. to simulate the biochemical effects of of the nutrient-enhanced seawater plumes that are discharged by one or several 100 megawatt OTEC plants. The modeling is needed to properly design OTEC plants that can operate sustainably with acceptably low biological impact. In order to quantify the effect of discharge configuration and phytoplankton response, Makai Ocean Engineering implemented a biological and physical model for the waters surrounding O`ahu, Hawai`i, using the EPA-approved Environmental Fluid Dynamics Code (EFDC). Each EFDC grid cell was approximately 1 square kilometer by 20 meters deep, and used a time step of three hours. The biological model was set up to simulate the biochemical response for three classes of organisms: Picoplankton (< 2 um) such as prochlorococccus, nanoplankton (2-20 um), and microplankton (> 20 um) e.g., diatoms. The dynamic biological phytoplankton model was calibrated using chemical and biological data collected for the Hawaii Ocean Time Series (HOTS) project. Peer review of the biological modeling was performed. The physical oceanography model uses boundary conditions from a surrounding Hawai'i Regional Ocean Model, (ROM) operated by the University of Hawai`i and the National Atmospheric and Oceanic Administration. The ROM provided tides, basin scale circulation, mesoscale variability, and atmospheric forcing into the edges of the EFDC computational domain. This model is the most accurate and sophisticated Hawai'ian Regional Ocean Model presently available, assimilating real-time oceanographic observations, as well as model calibration based upon temperature, current and salinity data collected during 2010 near the simulated OTEC site. The ROM program manager peer-reviewed Makai's implementation of the ROM output into our EFDC model. The supporting oceanographic data was collected for a Naval Facilities Engineering Command / Makai project. Results: The model was run for a 100 MW OTEC Plant consisting of four separate ducts, discharging a total combined flow rate of 420 m3/s of warm water and 320 m3/s of cold water in a mixed discharge at 70 meters deep. Each duct was assumed to have a discharge port diameter of 10.5m producing a downward discharge velocity of about 2.18 m/s. The natural system, as measured in the HOTS program, has an average concentration of 10-15 mgC/m3. To calibrate the biological model, we first ran the model with no OTEC plant and varied biological parameters until the simulated data was a good match to the HOTS observations. This modeling showed that phytoplankton concentration were patchy and highly dynamic. The patchiness was a good match with the data variability observed within the HOTS data sets. We then ran the model with simulated OTEC intake and discharge flows and associated nutrients. Directly under the OTEC plant, the near-field plume has an average terminal depth of 172 meters, with a volumetric dilution of 13:1. The average terminal plume temperature was 19.8oC. Nitrate concentrations are 1 to 2 umol/kg above ambient. The advecting plume then further dilutes to less than 1 umol/kg above ambient within a few kilometers downstream, while remaining at depth. Because this terminal near-field plume is well below the 1% light limited depths (~120m), no immediate biological utilization of the nutrients occurs. As the nitrate is advected and dispersed downstream, a fraction of the deep ocean nutrients (< 0.5 umol/kg perturbation) mix upward where they are utilized by the ambient phytoplankton population. This occurs approximately twenty-five kilometers downstream from the plant at 110 - 70 meters depth. For pico-phytoplankton, modeling results indicate that this nutrient perturbation causes a phytoplankton perturbation of approximately 1 mgC/m3 (~10% of average ambient concentrations) that covers an area 10x5 km in size at the 70 to 90m depth. Thus, the perturbations are well within the natural variability of the system, generally corresponding to a 10 to 15% increase above the a
Parameter Discovery for Stochastic Computational Models in Systems Biology Using Bayesian Model
Parameter Discovery for Stochastic Computational Models in Systems Biology Using Bayesian Model--Parameterized probabilistic complex computational (P2 C2 ) models are increasingly used in computational systems biology to study biochemical and physiological systems. A key challenge is to build mechanistic P2 C2 models
Logic and the set theory Lecture 19: The set theory
Choi, Suhyoung
Logic and the set theory Lecture 19: The set theory S. Choi Department of Mathematical Science KAIST, Daejeon, South Korea Fall semester, 2012 S. Choi (KAIST) Logic and set theory November 20, 2012 1 / 24 #12;Introduction About this lecture Axioms of the set theory S. Choi (KAIST) Logic and set theory
Instantaneous stochastic perturbation theory
Martin Lüscher
2014-12-17T23:59:59.000Z
A form of stochastic perturbation theory is described, where the representative stochastic fields are generated instantaneously rather than through a Markov process. The correctness of the procedure is established to all orders of the expansion and for a wide class of field theories that includes all common formulations of lattice QCD.
Catterall, Simon [Syracuse University] [Syracuse University; Hubisz, Jay [Syracuse University] [Syracuse University; Balachandran, Aiyalam [Syracuse University] [Syracuse University; Schechter, Joe [Syracuse University] [Syracuse University
2013-01-05T23:59:59.000Z
This final report describes the activities of the high energy theory group at Syracuse University for the period 1 January 2010 through April 30 2013. The research conducted by the group includes lattice gauge theory, non-commutative geometry, phenomenology and mathematical physics.
Geometric perturbation theory and plasma physics
Omohundro, S.M.
1985-04-04T23:59:59.000Z
Modern differential geometric techniques are used to unify the physical asymptotics underlying mechanics, wave theory and statistical mechanics. The approach gives new insights into the structure of physical theories and is suited to the needs of modern large-scale computer simulation and symbol manipulation systems. A coordinate-free formulation of non-singular perturbation theory is given, from which a new Hamiltonian perturbation structure is derived and related to the unperturbed structure. The theory of perturbations in the presence of symmetry is developed, and the method of averaging is related to reduction by a circle group action. The pseudo-forces and magnetic Poisson bracket terms due to reduction are given a natural asymptotic interpretation. Similar terms due to changing reference frames are related to the method of variation of parameters, which is also given a Hamiltonian formulation. These methods are used to answer a question about nearly periodic systems. The answer leads to a new secular perturbation theory that contains no ad hoc elements. Eikonal wave theory is given a Hamiltonian formulation that generalizes Whitham's Lagrangian approach. The evolution of wave action density on ray phase space is given a Hamiltonian structure using a Lie-Poisson bracket. The relationship between dissipative and Hamiltonian systems is discussed. A new type of attractor is defined which attracts both forward and backward in time and is shown to occur in infinite-dimensional Hamiltonian systems with dissipative behavior. The theory of Smale horseshoes is applied to gyromotion in the neighborhood of a magnetic field reversal and the phenomenon of reinsertion in area-preserving horseshoes is introduced. The central limit theorem is proved by renormalization group techniques. A natural symplectic structure for thermodynamics is shown to arise asymptotically from the maximum entropy formalism.
Loyka, Sergey
, Boca Raton, 2006. 20-Jul-05 Chapter 3: Information Theory and Electromagnetism: Are They Related? 1(37) INFORMATION THEORY AND ELECTROMAGNETISM: ARE THEY RELATED? Sergey Loyka1 , Juan Mosig2 1 School of Information [9-14]. Electromagnetic waves are used as the primary carrier of information. The basic
Research Paper Conflict Theory, Complexity and Systems
Gallo, Giorgio
and Interdisciplinary Center `Sciences for Peace', University of Pisa, Pisa, Italy Since the end of the Cold War, we). *Correspondence to: Giorgio Gallo, Computer Science, University of Pisa, Largo B. Pontecorvo 3, Pisa, Italy. E
Systems Theory for Pharmaceutical Drug Discovery
Aswani, Anil Jayanti
2010-01-01T23:59:59.000Z
model to identify multiple drug targets which can be candidates for the traditional process of drug discovery.
Dynamical system theory of periodically collapsing bubbles
Yukalov, V I; Sornette, D
2015-01-01T23:59:59.000Z
We propose a reduced form set of two coupled continuous time equations linking the price of a representative asset and the price of a bond, the later quantifying the cost of borrowing. The feedbacks between asset prices and bonds are mediated by the dependence of their "fundamental values" on past asset prices and bond themselves. The obtained nonlinear self-referencing price dynamics can induce, in a completely objective deterministic way, the appearance of periodically exploding bubbles ending in crashes. Technically, the periodically explosive bubbles arise due to the proximity of two types of bifurcations as a function of the two key control parameters $b$ and $g$, which represent, respectively, the sensitivity of the fundamental asset price on past asset and bond prices and of the fundamental bond price on past asset prices. One is a Hopf bifurcation, when a stable focus transforms into an unstable focus and a limit cycle appears. The other is a rather unusual bifurcation, when a stable node and a saddle...
Systems Theory for Pharmaceutical Drug Discovery
Aswani, Anil Jayanti
2010-01-01T23:59:59.000Z
3):371–381, 2002. [204] Alan Turing. The chemical basis ofwas the seminal paper by Alan Turing on morphogenesis. The
Theory and application of open quantum systems
Chan, Ching-Kit; Chan, Ching-Kit
2012-01-01T23:59:59.000Z
of a coherent electromagnetic pulse. It treats the controlwith a laser pulse and the electromagnetic vacuum in the
Foliable Operational Structures for General Probabilistic Theories
Lucien Hardy
2009-12-23T23:59:59.000Z
In this chapter a general mathematical framework for probabilistic theories of operationally understood circuits is laid out. Circuits are comprised of operations and wires. An operation is one use of an apparatus and a wire is a diagrammatic device for showing how apertures on the apparatuses are placed next to each other. Mathematical objects are defined in terms of the circuit understood graphically. In particular, we do not think of the circuit as sitting in a background time. Circuits can be foliated by hypersurfaces comprised of sets of wires. Systems are defined to be associated with wires. A closable set of operations is defined to be one for which the probability associated with any circuit built from this set is independent both of choices on other circuits and of extra circuitry that may be added to outputs from this circuit. States can be associated with circuit fragments corresponding to preparations. These states evolve on passing through circuit fragments corresponding to transformations. The composition of transformations is treated. A number of theorems are proven including one which rules out quaternionic quantum theory. The case of locally tomographic theories (where local measurements on a systems components suffice to determine the global state) is considered. For such theories the probability can be calculated for a circuit from matrices pertaining the operations that comprise that circuit. Classical probability theory and quantum theory are exhibited as examples in this framework.
Coding theory basics Toric codes
Little, John B.
Coding theory basics Toric codes Tools from the toric world Higher-dimensional polytopes. Little Toric Varieties in Coding Theory #12;Coding theory basics Toric codes Tools from the toric world(!) John B. Little Toric Varieties in Coding Theory #12;Coding theory basics Toric codes Tools from
Theory of rheology in confinement
Artem A. Aerov; Matthias Krüger
2014-12-12T23:59:59.000Z
The viscosity of fluids is generally understood in terms of kinetic mechanisms, i.e., particle collisions, or thermodynamic ones as imposed through structural distortions upon e.g. applying shear. Often the former is less relevant, and (damped) Brownian particles are considered good fluid model systems. We formulate a general theoretical approach for rheology in confinement, based on the many particle diffusion equation, evaluated via classical density functional theory. We discuss the viscosity for the situation of two parallel walls in relative motion as a function of wall-to-wall distance.
M-Theory and Maximally Supersymmetric Gauge Theories
Neil Lambert
2012-05-21T23:59:59.000Z
In this informal review for non-specalists we discuss the construction of maximally supersymmetric gauge theories that arise on the worldvolumes branes in String Theory and M-Theory. Particular focus is made on the relatively recent construction of M2-brane worldvolume theories. In a formal sense, the existence of these quantum field theories can be viewed as predictions of M-Theory. Their construction is therefore a reinforcement of the ideas underlying String Theory and M-Theory. We also briefly discuss the six-dimensional conformal field theory that is expected to arise on M5-branes. The construction of this theory is not only an important open problem for M-Theory but also a significant challenge to our current understanding of quantum field theory more generally.
DistillationTheory.fm 2 September 1999 Distillation Theory.
Skogestad, Sigurd
1 DistillationTheory.fm 2 September 1999 Distillation Theory. by Ivar J. Halvorsen and Sigurd, Norway #12;2 DistillationTheory.fm 2 September 1999 Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Material Balance on a Distillation Stage
Viscosity, Black Holes, and Quantum Field Theory
D. T. Son; A. O. Starinets
2007-07-11T23:59:59.000Z
We review recent progress in applying the AdS/CFT correspondence to finite-temperature field theory. In particular, we show how the hydrodynamic behavior of field theory is reflected in the low-momentum limit of correlation functions computed through a real-time AdS/CFT prescription, which we formulate. We also show how the hydrodynamic modes in field theory correspond to the low-lying quasinormal modes of the AdS black p-brane metric. We provide a proof of the universality of the viscosity/entropy ratio within a class of theories with gravity duals and formulate a viscosity bound conjecture. Possible implications for real systems are mentioned.
Locally convex topologies and control theory Saber Jafarpour Andrew D. Lewis
Lewis, Andrew D.
Locally convex topologies and control theory Saber Jafarpour Andrew D. Lewis 28/01/2014 Abstract of the vector fields. Keywords. Geometric control theory, locally convex topologies, real analytic systems AMS control theory, one considers systems of the form (t) = F((t), Âµ(t)), where t Âµ(t) is a curve taking
Path Integral Quantization of Landau-Ginzburg Theory
Walaa. I. Eshraim
2013-01-11T23:59:59.000Z
Hamilton-Jacobi approach for a constrained system is discussed. The equation of motion for a singular systems are obtained as total differential equations in many variables. The integrability conditions are investigated without using any gauge fixing condition. The path integral quantization for systems with finite degrees of freedom is applied to the field theories with constraints. The Landau-Ginzburg theory is investigated in details.
A simple framework to justify linear response theory
Martin Hairer; Andrew J Majda
2010-02-17T23:59:59.000Z
The use of linear response theory for forced dissipative stochastic dynamical systems through the fluctuation dissipation theorem is an attractive way to study climate change systematically among other applications. Here, a mathematically rigorous justification of linear response theory for forced dissipative stochastic dynamical systems is developed. The main results are formulated in an abstract setting and apply to suitable systems, in finite and infinite dimensions, that are of interest in climate change science and other applications.
Hamilton-Jacobi Theory in k-Symplectic Field Theories
M. De LeÓn; D. MartÍn De Diego; J. C. Marrero; M. Salgado; S. Vilariño
2010-05-10T23:59:59.000Z
In this paper we extend the geometric formalism of Hamilton-Jacobi theory for Mechanics to the case of classical field theories in the k-symplectic framework.
Quantum statistical correlations in thermal field theories: Boundary effective theory
Bessa, A. [Escola de Ciencias e Tecnologia, Universidade Federal do Rio Grande do Norte, Caixa Postal 1524, 59072-970, Natal, RN (Brazil); Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, 05315-970, Sao Paulo, SP (Brazil); Brandt, F. T. [Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, 05315-970, Sao Paulo, SP (Brazil); Carvalho, C. A. A. de; Fraga, E. S. [Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21941-972, Rio de Janeiro, RJ (Brazil)
2010-09-15T23:59:59.000Z
We show that the one-loop effective action at finite temperature for a scalar field with quartic interaction has the same renormalized expression as at zero temperature if written in terms of a certain classical field {phi}{sub c}, and if we trade free propagators at zero temperature for their finite-temperature counterparts. The result follows if we write the partition function as an integral over field eigenstates (boundary fields) of the density matrix element in the functional Schroedinger field representation, and perform a semiclassical expansion in two steps: first, we integrate around the saddle point for fixed boundary fields, which is the classical field {phi}{sub c}, a functional of the boundary fields; then, we perform a saddle-point integration over the boundary fields, whose correlations characterize the thermal properties of the system. This procedure provides a dimensionally reduced effective theory for the thermal system. We calculate the two-point correlation as an example.
Data Modeling and Theory Construction
Jan de Leeuw
2011-01-01T23:59:59.000Z
MODELING AND THEORY CONSTRUCTION F. Suppe. The Structure ofMODELING AND THEORY CONSTRUCTION JAN DE LEEUW This paper wasMODELING AND THEORY CONSTRUCTION F????? 1. The Scientist
Reverse Engineering Quantum Field Theory
Robert Oeckl
2012-10-02T23:59:59.000Z
An approach to the foundations of quantum theory is advertised that proceeds by "reverse engineering" quantum field theory. As a concrete instance of this approach, the general boundary formulation of quantum theory is outlined.
STATISTICAL MECHANICS AND FIELD THEORY
Samuel, S.A.
2010-01-01T23:59:59.000Z
York. K. Bardakci, Field Theory for Solitons, II, BerkeleyFart I Applications of Field Theory Methods to StatisticalStatistical Mechanics to Field Theory Chapter IV The Grand
Limited Holism and Real-Vector-Space Quantum Theory
Lucien Hardy; William K. Wootters
2010-05-26T23:59:59.000Z
Quantum theory has the property of "local tomography": the state of any composite system can be reconstructed from the statistics of measurements on the individual components. In this respect the holism of quantum theory is limited. We consider in this paper a class of theories more holistic than quantum theory in that they are constrained only by "bilocal tomography": the state of any composite system is determined by the statistics of measurements on pairs of components. Under a few auxiliary assumptions, we derive certain general features of such theories. In particular, we show how the number of state parameters can depend on the number of perfectly distinguishable states. We also show that real-vector-space quantum theory, while not locally tomographic, is bilocally tomographic.
The Importance of Developing a Foundation for Naive Category Theory
Marcoen J. T. F. Cabbolet
2015-09-28T23:59:59.000Z
Recently Feferman (Rev. Symb. Logic 6: 6-15, 2013) has outlined a program for the development of a foundation for naive category theory. While Ernst (ibid. 8: 306-327, 2015) has shown that the resulting axiomatic system is still inconsistent, the purpose of this note is to show that nevertheless some foundation has to be developed before naive category theory can replace axiomatic set theory as a foundational theory for mathematics. It is argued that in naive category theory currently a 'cookbook recipe' is used for constructing categories, and it is explicitly shown with a formalized argument that this 'foundationless' naive category theory therefore contains a paradox similar to the Russell paradox of naive set theory.
Theory of Dipole Induced Electromagnetic Transparency
Puthumpally-Joseph, Raiju; Sukharev, Maxim; Charron, Eric
2015-01-01T23:59:59.000Z
A detailed theory describing linear optics of vapors comprised of interacting multi-level quantum emitters is proposed. It is shown both by direct integration of Maxwell-Bloch equations and using a simple analytical model that at large densities narrow transparency windows appear in otherwise completely opaque spectra. The existence of such windows is attributed to overlapping resonances. This effect, first introduced for three-level systems in [R. Puthumpally-Joseph, M. Sukharev, O. Atabek and E. Charron, Phys. Rev. Lett. 113, 163603 (2014)], is due to strongly enhanced dipole-dipole interactions at high emitters' densities. The presented theory extends this effect to the case of multilevel systems. The theory is applied to the D1 transitions of interacting Rb-85 atoms. It is shown that at high atomic densities, Rb-85 atoms can behave as three-level emitters exhibiting all the properties of dipole induced electromagnetic transparency. Applications including slow light and laser pulse shaping are also propose...
Pressure of massless hot scalar theory in the boundary effective theory framework
Bessa, A. [Escola de Ciencias e Tecnologia, Universidade Federal do Rio Grande do Norte, Caixa Postal 1524, 59072-970, Natal, RN (Brazil); Brandt, F. T. [Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, 05315-970, Sao Paulo, SP (Brazil); Carvalho, C. A. A. de; Fraga, E. S. [Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21941-972, Rio de Janeiro, RJ (Brazil)
2011-04-15T23:59:59.000Z
We use the boundary effective theory approach to thermal field theory in order to calculate the pressure of a system of massless scalar fields with quartic interaction. The method naturally separates the infrared physics, and is essentially nonperturbative. To lowest order, the main ingredient is the solution of the free Euler-Lagrange equation with nontrivial (time) boundary conditions. We derive a resummed pressure, which is in good agreement with recent calculations found in the literature, following a very direct and compact procedure.
Sproston, Jeremy
> = { expression > -> expression >, , kinetic function in the form if exp (,=) exp then exp else exp. · kinetic function: is described both through expression for the parameters of kinetic functions. 1 - Run the program java -jar Biomodel.jar 2 Definition a model
Mirzabekov, Andrei Darievich (Moscow, RU); Lysov, Yuri Petrovich (Moscow, RU); Dubley, Svetlana A. (Moscow, RU)
2000-01-01T23:59:59.000Z
A method for fractionating and sequencing DNA via affinity interaction is provided comprising contacting cleaved DNA to a first array of oligonucleotide molecules to facilitate hybridization between said cleaved DNA and the molecules; extracting the hybridized DNA from the molecules; contacting said extracted hybridized DNA with a second array of oligonucleotide molecules, wherein the oligonucleotide molecules in the second array have specified base sequences that are complementary to said extracted hybridized DNA; and attaching labeled DNA to the second array of oligonucleotide molecules, wherein the labeled re-hybridized DNA have sequences that are complementary to the oligomers. The invention further provides a method for performing multi-step conversions of the chemical structure of compounds comprising supplying an array of polyacrylamide vessels separated by hydrophobic surfaces; immobilizing a plurality of reactants, such as enzymes, in the vessels so that each vessel contains one reactant; contacting the compounds to each of the vessels in a predetermined sequence and for a sufficient time to convert the compounds to a desired state; and isolating the converted compounds from said array.
Grassmannian and string theory
Albert Schwarz
1996-12-02T23:59:59.000Z
Infinite-dimensional Grassmannian manifold contains moduli spaces of Riemann surfaces of all genera. This well known fact leads to a conjecture that non-perturbative string theory can be formulated in terms of Grassmannian. We present new facts supporting this hypothesis. In particular, it is shown that Grassmannians can be considered as generalized moduli spaces; this statement permits us to define corresponding "string amplitudes" (at least formally). One can conjecture, that it is possible to explain the relation between non-perturbative and perturbative string theory by means of localization theorems for equivariant cohomology; this conjecture is based on the characterization of moduli spaces, relevant to string theory, as sets consisting of points with large stabilizers in certain groups acting on Grassmannian. We describe an involution on the Grassmannian that could be related to S-duality in string theory.
Abstracting over Semantic Theories
Holt, Alexander G B
The topic of this thesis is abstraction over theories of formal semantics for natural language.It is motivated by the belief that a metatheoretical perspective can contribute both to a better theoretical understanding of ...
Hull, Chris
The zero modes of closed strings on a torus — the torus coordinates plus dual coordinates conjugate to winding number — parameterize a doubled torus. In closed string field theory, the string field depends on all zero-modes ...
viii Contents. Three Field Theory. 87—89. 90—95. 96—97. 98—107. 108—114. 115—121. De?nition and examples of ?eld structure 67. Vector spaces, bases ...
Gold, Natalie; Sugden, Robert
2007-01-01T23:59:59.000Z
In decision theory, it is almost universally presupposed that agency is invested in individuals: each person acts on her own preferences and beliefs. A person’s preferences may take account of the effects of her actions on ...
Nonsymmetric Gravitational Theory
J. W. Moffat
1994-11-10T23:59:59.000Z
A new version of nonsymmetric gravitational theory is presented. The field equations are expanded about the Minkowski metric, giving in lowest order the linear Einstein field equations and massive Proca field equations for the antisymmetric field $g_{[\\mu\
ALS Evidence Confirms Combustion Theory
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
ALS Evidence Confirms Combustion Theory ALS Evidence Confirms Combustion Theory Print Wednesday, 22 October 2014 11:43 Researchers recently uncovered the first step in the process...
Preemption Games: Theory and Experiment*
Anderson, Steven T; Friedman, Daniel; Oprea, Ryan
2008-01-01T23:59:59.000Z
of Investment: Extensions of Real Options Theory and Timingand Perraudin, W. , 2003, “Real options and preemption underand the theory of real options. We also characterize simpler
Wang, L.; Gamez, A.; Archer, H.; Abola, E.E.; Sarkissian, C.N.; Fitzpatrick, P.; Wendt, D.; Zhang, Y.; Vellard, M.; Bliesath, J.; Bell, S.; Lemont, J.; Scriver, C.R.; Stevens, R.C.
2009-05-26T23:59:59.000Z
We have recently observed promising success in a mouse model for treating the metabolic disorder phenylketonuria with phenylalanine ammonia lyase (PAL) from Rhodosporidium toruloides and Anabaena variabilis. Both molecules, however, required further optimization in order to overcome problems with protease susceptibility, thermal stability, and aggregation. Previously, we optimized PAL from R. toruloides, and in this case we reduced aggregation of the A. variabilis PAL by mutating two surface cysteine residues (C503 and C565) to serines. Additionally, we report the structural and biochemical characterization of the A. variabilis PAL C503S/C565S double mutant and carefully compare this molecule with the R. toruloides engineered PAL molecule. Unlike previously published PAL structures, significant electron density is observed for the two active-site loops in the A. variabilis C503S/C565S double mutant, yielding a complete view of the active site. Docking studies and N-hydroxysuccinimide-biotin binding studies support a proposed mechanism in which the amino group of the phenylalanine substrate is attacked directly by the 4-methylidene-imidazole-5-one prosthetic group. We propose a helix-to-loop conformational switch in the helices flanking the inner active-site loop that regulates accessibility of the active site. Differences in loop stability among PAL homologs may explain the observed variation in enzyme efficiency, despite the highly conserved structure of the active site. A. variabilis C503S/C565S PAL is shown to be both more thermally stable and more resistant to proteolytic cleavage than R. toruloides PAL. Additional increases in thermal stability and protease resistance upon ligand binding may be due to enhanced interactions among the residues of the active site, possibly locking the active-site structure in place and stabilizing the tetramer. Examination of the A. variabilis C503S/C565S PAL structure, combined with analysis of its physical properties, provides a structural basis for further engineering of residues that could result in a better therapeutic molecule.
Temperature Modeling in Activated Sludge Systems: A Case Study
Wells, Scott A.
Temperature Modeling in Activated Sludge Systems: A Case Study Jacek Makinia, Scott A. Wells, Piotr Zima ABSTRACT: A model of temperature dynamics was developed as part of a general model of activated-sludge biochemical-energy inputs and other activated-sludge, heat-balance terms. All the models were tested under
PROCESS SYSTEMS ENGINEERING Design of Flexible Reduced Kinetic Mechanisms
Androulakis, Ioannis (Yannis)
PROCESS SYSTEMS ENGINEERING Design of Flexible Reduced Kinetic Mechanisms Avinash R. Sirdeshpande and Marianthi G. Ierapetritou Dept. of Chemical and Biochemical Engineering, Rutgers, The State UniversityMobil Research and Engineering, Annandale, NJ 08801 Reduced mechanisms are often used in place of detailed
Optimiziing the laboratory monitoring of biological wastewater-purification systems
S.V. Gerasimov [OAO Koks, Kemerovo (Russian Federation)
2009-05-15T23:59:59.000Z
Optimization of the laboratory monitoring of biochemical wastewater-treatment systems at coke plants is considered, for the example of OAO Koks. By adopting a methodological approach to determine the necessary data from chemical analysis, it is possible to reduce the time, labor, and materials required for monitoring, without impairing the purification process or compromising the plant's environmental policies.
Chiara Marletto
2014-11-04T23:59:59.000Z
Neo-Darwinian evolutionary theory explains how the appearance of purposive design in the sophisticated adaptations of living organisms can have come about without their intentionally being designed. The explanation relies crucially on the possibility of certain physical processes: mainly, gene replication and natural selection. In this paper I show that for those processes to be possible without the design of biological adaptations being encoded in the laws of physics, those laws must have certain other properties. The theory of what these properties are is not part of evolution theory proper, and has not been developed, yet without it the neo-Darwinian theory does not fully achieve its purpose of explaining the appearance of design. To this end I apply Constructor Theory's new mode of explanation to provide an exact formulation of the appearance of design, of no-design laws, and of the logic of self-reproduction and natural selection, within fundamental physics. I conclude that self-reproduction, replication and natural selection are possible under no-design laws, the only non-trivial condition being that they allow digital information to be physically instantiated. This has an exact characterisation in the constructor theory of information. I also show that under no-design laws an accurate replicator requires the existence of a "vehicle" constituting, together with the replicator, a self-reproducer.
Network Security Validation Using Game Theory
Mavronicolas, Marios
1 Network Security Validation Using Game Theory Vicky Papadopoulou and Andreas Gregoriades Computer.papadopoulou,a.gregoriades}@euc.ac.cy Abstract: Non-functional requirements (NFR) such as network security recently gained widespread attention the immunity property of the distributed systems that depended on these networks. Security requirements
Fernández-Solis, José; Rybkowski, Zofia K.
2015-02-08T23:59:59.000Z
and production. This paper proposes that additional research is needed to measure synergistic and systemic waste and value. Visualizing waste in construction is the point of departure for those seeking to find and minimize or eliminate waste and create a theory...
A COMPLEXITY THEORY OF CONSTRUCTIBLE FUNCTIONS AND ...
2014-09-30T23:59:59.000Z
in the new definitions are constructible functions on Rn or Cn. We define .... representation theory and algebraic geometry can be made to bear on this subject .... of the zeros of a polynomial system P = {P1,...,Pn} ? C[X1,...,Xn], in terms ... applied areas such as signal processing and data analysis [4], but to our knowledge.
Beyond heat baths II: Framework for generalized thermodynamic resource theories
Nicole Yunger Halpern
2015-06-17T23:59:59.000Z
Thermodynamics, which describes vast systems, has been reconciled with small scales, relevant to single-molecule experiments, in resource theories. Resource theories have been used to model exchanges of energy and information. Recently, particle exchanges were modeled; and an umbrella family of thermodynamic resource theories was proposed to model diverse baths, interactions, and free energies. This paper motivates and details the family's structure and prospective applications. How to model electrochemical, gravitational, magnetic, and other thermodynamic systems is explained. Szilard's engine and Landauer's Principle are generalized, as resourcefulness is shown to be convertible not only between information and gravitational energy, but also among diverse degrees of freedom. Extensive variables are associated with quantum operators that might fail to commute, introducing extra nonclassicality into thermodynamic resource theories. This generalization expands the theories' potential for modeling realistic systems with which small-scale statistical mechanics might be tested experimentally.
Buyyounouski, Mark K. [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States)], E-mail: mark.buyyounouski@fccc.edu; Hanlon, Alexandra L.; Horwitz, Eric M.; Pollack, Alan [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA (United States)
2008-01-01T23:59:59.000Z
Purpose: Few biochemical parameters have been related to mortality. The present study examined the clinical utility of the interval to biochemical failure (IBF) as a prognostic factor for distant metastasis (DM) and prostate cancer-specific mortality (PCSM) after radiotherapy. Methods and Materials: The study group consisted of 211 T1c-T3Nx-N0M0 patients who had experienced BF among 1,174 men treated with three-dimensional conformal radiotherapy alone. Biochemical failure was defined as a post-treatment prostate-specific antigen (PSA) level of at, or greater than, the PSA nadir plus 2 ng/mL. Cox proportional hazards modeling was used to identify independent predictors of DM and PCSM on multivariate analysis. Results: An IBF of <18 months was independently predictive for DM (p = 0.008), as was a Gleason score of 7-10 (p = 0.0005), PSA nadir {>=}2 ng/mL (p = 0.04), and decreasing radiation dose (p = 0.02) on multivariate analysis, including increasing pretreatment PSA level, PSA nadir {>=}2.5 ng/mL, PSA doubling time of <3 months, and Stage T3 disease. An IBF of <18 months was the only predictor of PCSM (p = 0.0003) in the same model. The actuarial 5-year DM rate for an IBF of <18 vs. {>=}18 months was 52% vs. 20% (p < 0.0001), and the actuarial PCSM rate was 36% vs. 6%, respectively (p = 0.0001). Conclusions: The IBF is an important descriptor of the PSA kinetics after radiotherapy to identify men at high risk of clinical failure and death. A IBF of <18 months could aid in selecting men for early, aggressive salvage therapy or participation in a clinical trial.
36 December 2007 2007 The Biochemical Society Regulars Schools in depth
Marchant, Jonathan
- terial transformation assays with fluorescent protein variants11 . Each of these experiments-cast electrophoretic cassette systems, such as those marketed by Invitrogen (E-gels®)12 and Lonza (FlashGel® DNA system (built-in power supplies for the E-gel® system), as well as ease of loading and handling for students
Chaotic thermalization in classical gauge theories
Woitek, Marcio; Krein, Gastao [Instituto de Fisica Teorica, Universidade Estadual Paulista Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II, Sao Paulo, SP (Brazil)
2013-05-06T23:59:59.000Z
We explore the idea that chaos concepts might be useful for understanding the thermalization in gauge theories. The SU(2) Higgs model is discussed as a prototype of system with gauge fields coupled to matter fields. Through the numerical solution of the equations of motion, we are able to characterize chaotic behavior via the corresponding Lyapunov exponent. Then it is demonstrated that the system's approach to equilibrium can be understood through direct application of the principles of Statistical Mechanics.
Geometric control theory, closing lemma, and weak KAM theory
Rifford, Ludovic
Geometric control theory, closing lemma, and weak KAM theory Ludovic Rifford UniversitÂ´e de Nice - Sophia Antipolis Ludovic Rifford Weak KAM Theory in Italy #12;Outline Lecture 1: Geometric control) Lecture 4: Closing Aubry sets Ludovic Rifford Weak KAM Theory in Italy #12;Lecture 1 Geometric control
Theory Interpretation in Simple Type Theory William M. Farmer
Farmer, William M.
Theory Interpretation in Simple Type Theory William M. Farmer The MITRE Corporation 202 Burlington Road Bedford, MA 01730-1420, USA farmer@mitre.org 26 October 1994 Abstract. Theory interpretation is a logical technique for relating one axiomatic theory to another with important applications in mathematics
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory Foam Used in Actual Outbreak · Water #12;Disposal: Science and Theory Water Based Foam Culling Demo · First large scale comparison · Two:46 (m:s) #12;Disposal: Science and Theory WV H5N2 AIV 2007 · AIV positive turkeys 25,000 turkey farm
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory Poultry Farm Daily Disposal Methods 0;Disposal: Science and Theory First Composter in Delaware · Delmarva was of the first daily composting · 120 in USA over next 10 years #12;Disposal: Science and Theory Composting Procedure · Mixture 1 ½ to 2
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory Use of Composting · Composting has British Columbia 2009 #12;Disposal: Science and Theory · Initial farm linked to NY LBM · Two additional and pile procedure Delmarva 2004 #12;Disposal: Science and Theory Delmarva 2004 · Composting used
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory · Las recomendaciones de campo se la espuma #12;Disposal: Science and Theory · Múltiples especies de aves pueden despoblarse con espuma cesación #12;Disposal: Science and Theory · Dentro de una especie, pueden existir variaciones Los ánades
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory · Procedimiento básico Desarrollar una pila de carcasas y lecho. Compostaje masivo de emergencia #12;Disposal: Science and Theory de emergencia #12;Disposal: Science and Theory · Desarrollar planes antes de que ocurra una
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory 0 20 40 60 80 100 Compostaje #12;Disposal: Science and Theory · Delmarva fue de las primeras granjas en realizar el compostaje de en EE.UU. en los próximos 10 años. Pionera en compostaje en Delaware #12;Disposal: Science and Theory
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory · Compostaje de aves de corralRouchey et al., 2005) Investigación previa #12;Disposal: Science and Theory · Se ha evaluado y documentado el, bovino Investigación previa #12;Disposal: Science and Theory · Experimento nro. 1 Impacto de la espuma en
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory · El compostaje se define como la: Science and Theory · Compostaje óptimo Relación carbono/nitrógeno (C:N): 20:1 a 35:1 Contenido de Compostaje #12;Disposal: Science and Theory · Se ha utilizado satisfactoriamente una variedad de materiales
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory · Se ubica el carretón con el enfriamiento Ventiladores de túnel de viento #12;Disposal: Science and Theory · Se estaciona el remolque en uno: Science and Theory · Se usa un equipo de dos personas para hacer funcionar el sistema: Operario del
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory Composting · Composting is defined drop #12;Disposal: Science and Theory Composting · Optimal composting Carbon to nitrogen ratio (C;Disposal: Science and Theory Compost Composition · A variety of supplemental carbon materials have been
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory · Opciones para la eliminación · ¿Qué compostaje durante brotes de enfermedades Lista de contenido #12;Disposal: Science and Theory "Ante un brote brotes de IIAP #12;Disposal: Science and Theory · En 2004, se despoblaron 100 millones de aves en todo el
Disposal: Science and Theory Disposal: Science and Theory
Benson, Eric R.
Disposal: Science and Theory #12;Disposal: Science and Theory · El compostaje se ha usado como Virginia (2007) British Columbia (2009) Uso del compostaje #12;Disposal: Science and Theory · Primera apilamiento Delmarva (2004) #12;Disposal: Science and Theory · El compostaje se usó para proteger una densa