#### Sample records for applied chemical theory

1. Applied number theory

CERN Document Server

Niederreiter, Harald

2015-01-01

This textbook effectively builds a bridge from basic number theory to recent advances in applied number theory. It presents the first unified account of the four major areas of application where number theory plays a fundamental role, namely cryptography, coding theory, quasi-Monte Carlo methods, and pseudorandom number generation, allowing the authors to delineate the manifold links and interrelations between these areas.  Number theory, which Carl-Friedrich Gauss famously dubbed the queen of mathematics, has always been considered a very beautiful field of mathematics, producing lovely results and elegant proofs. While only very few real-life applications were known in the past, today number theory can be found in everyday life: in supermarket bar code scanners, in our cars’ GPS systems, in online banking, etc.  Starting with a brief introductory course on number theory in Chapter 1, which makes the book more accessible for undergraduates, the authors describe the four main application areas in Chapters...

2. Applied chemical engineering thermodynamics

CERN Document Server

Tassios, Dimitrios P

1993-01-01

Applied Chemical Engineering Thermodynamics provides the undergraduate and graduate student of chemical engineering with the basic knowledge, the methodology and the references he needs to apply it in industrial practice. Thus, in addition to the classical topics of the laws of thermodynamics,pure component and mixture thermodynamic properties as well as phase and chemical equilibria the reader will find: - history of thermodynamics - energy conservation - internmolecular forces and molecular thermodynamics - cubic equations of state - statistical mechanics. A great number of calculated problems with solutions and an appendix with numerous tables of numbers of practical importance are extremely helpful for applied calculations. The computer programs on the included disk help the student to become familiar with the typical methods used in industry for volumetric and vapor-liquid equilibria calculations.

3. Dempster-Shafer theory applied to regulatory decision process for selecting safer alternatives to toxic chemicals in consumer products.

Science.gov (United States)

Park, Sung Jin; Ogunseitan, Oladele A; Lejano, Raul P

2014-01-01

Regulatory agencies often face a dilemma when regulating chemicals in consumer products-namely, that of making decisions in the face of multiple, and sometimes conflicting, lines of evidence. We present an integrative approach for dealing with uncertainty and multiple pieces of evidence in toxics regulation. The integrative risk analytic framework is grounded in the Dempster-Shafer (D-S) theory that allows the analyst to combine multiple pieces of evidence and judgments from independent sources of information. We apply the integrative approach to the comparative risk assessment of bisphenol-A (BPA)-based polycarbonate and the functionally equivalent alternative, Eastman Tritan copolyester (ETC). Our results show that according to cumulative empirical evidence, the estimated probability of toxicity of BPA is 0.034, whereas the toxicity probability for ETC is 0.097. However, when we combine extant evidence with strength of confidence in the source (or expert judgment), we are guided by a richer interval measure, (Bel(t), Pl(t)). With the D-S derived measure, we arrive at various intervals for BPA, with the low-range estimate at (0.034, 0.250), and (0.097,0.688) for ETC. These new measures allow a reasonable basis for comparison and a justifiable procedure for decision making that takes advantage of multiple sources of evidence. Through the application of D-S theory to toxicity risk assessment, we show how a multiplicity of scientific evidence can be converted into a unified risk estimate, and how this information can be effectively used for comparative assessments to select potentially less toxic alternative chemicals. PMID:23804574

4. Dempster-Shafer theory applied to regulatory decision process for selecting safer alternatives to toxic chemicals in consumer products.

OpenAIRE

Park, SJ; Ogunseitan, OA; Lejano, RP

2014-01-01

Regulatory agencies often face a dilemma when regulating chemicals in consumer products-namely, that of making decisions in the face of multiple, and sometimes conflicting, lines of evidence. We present an integrative approach for dealing with uncertainty and multiple pieces of evidence in toxics regulation. The integrative risk analytic framework is grounded in the Dempster-Shafer (D-S) theory that allows the analyst to combine multiple pieces of evidence and judgments from independent sourc...

5. Applied neutron resonance theory

International Nuclear Information System (INIS)

Utilisation of resonance theory in basic and applications-oriented neutron cross section work is reviewed. The technically important resonance formalisms, principal concepts and methods as well as representative computer programs for resonance parameter extraction from measured data, evaluation of resonance data, calculation of Doppler-broadened cross sections and estimation of level-statistical quantities from resonance parameters are described. (orig.)

6. Applied electromagnetic scattering theory

CERN Document Server

Osipov, Andrey A

2016-01-01

Besides classical applications (radar and stealth, antennas, microwave engineering), scattering and diffraction are enabling phenomena for some emerging research fields (artificial electromagnetic materials or metamaterials, terahertz technologies, electromagnetic aspects of nano-science). This book is a tutorial for advanced students who need to study diffraction theory. The textbook gives fundamental knowledge about scattering and diffraction of electromagnetic waves and provides some working examples of solutions for practical high-frequency scattering and diffraction problems. The book focuses on the most important diffraction effects and mechanisms influencing the scattering process and describes efficient and physically justified simulation methods - physical optics (PO) and the physical theory of diffraction (PTD) - applicable in typical remote sensing scenarios. The material is presented in a comprehensible and logical form, which relates the presented results to the basic principles of electromag...

7. Applied String Theory

CERN Document Server

Schimmrigk, Rolf

2008-01-01

This is a review. Comments are welcome. The observation that the structure of string theory is rich enough to include the standard model in rough outline is an old one, starting with the early constructions of free field constructions, orbifold theories, and in particular Calabi-Yau compactifications in the late 1980s and early 1990s. At the time these constructions provided a large collection of different vacua, with thousands of explicitly constructed Calabi-Yau manifolds, and estimates of vast numbers of bosonic models, each one associated with its own moduli space. It was clear even then that it would be impossible to systematically search this string vacua landscape. This, however, is not a fundamental problem. Adopting the point of view that any physical theory has to describe not only our universe, but all possible consistent universes, leads to the obvious strategy of using some phenomenological input to select viable models among the ocean of models that obviously do not describe physics as we know i...

8. Applied systems theory

CERN Document Server

Dekkers, Rob

2014-01-01

Offering an up-to-date account of systems theories and its applications, this book provides a different way of resolving problems and addressing challenges in a swift and practical way, without losing overview and not having a grip on the details. From this perspective, it offers a different way of thinking in order to incorporate different perspectives and to consider multiple aspects of any given problem. Drawing examples from a wide range of disciplines, it also presents worked cases to illustrate the principles. The multidisciplinary perspective and the formal approach to modelling of syst

9. Theory of Chemical Modeling

Science.gov (United States)

Kühn, Michael

In order to deal with the complexity of natural systems simplified models are employed to illustrate the principal and regulatory factors controlling a chemical system. Following the aphorism of Albert Einstein: Everything should be made as simple as possible, but not simpler, models need not to be completely realistic to be useful (Stumm and Morgan 1996), but need to meet a successful balance between realism and practicality. Properly constructed, a model is neither too simplified that it is unrealistic nor too detailed that it cannot be readily evaluated and applied to the problem of interest (Bethke 1996). The results of a model have to be at least partially observable or experimentally verifiable (Zhu and Anderson 2002). Geochemical modeling theories are presented here in a sequence of increasing complexity from geochemical equilibrium models to kinetic, reaction path, and finally coupled transport and reaction models. The description is far from complete but provides the needs for the set up of reactive transport models of hydrothermal systems as done within subsequent chapters. Extensive reviews of geochemical models in general can be found in the literature (Appelo and Postma 1999, Bethke 1996, Melchior and Bassett 1990, Nordstrom and Ball 1984, Paschke and van der Heijde 1996).

10. Applied group theory applications in the engineering (physical, chemical, and medical), biological, social, and behavioral sciences and in the fine arts

Science.gov (United States)

Borg, S. F.

1976-01-01

A generalized applied group theory is developed, and it is shown that phenomena from a number of diverse disciplines may be included under the umbrella of a single theoretical formulation based upon the concept of a group consistent with the usual definition of this term.

11. Applying Psychological Theories to Educational Practice

Science.gov (United States)

Sternberg, Robert

2008-01-01

Two approaches to the application of psychological theories to education might be referred to as domain-general and domain-specific. The domain-general approach seeks a general theory of cognitive and other skills that apply across subject-matter areas. The domain-specific approach seeks to apply specific theories within given domains, such as…

12. Semigroup theory applied to options

OpenAIRE

Cruz-Báez, D. I.; González-Rodríguez, J. M.

2002-01-01

Black and Scholes (1973) proved that under certain assumptions about the market place, the value of a European option, as a function of the current value of the underlying asset and time, verifies a Cauchy problem. We give new conditions for the existence and uniqueness of the value of a European option by using semigroup theory. For this, we choose a suitable space that verifies some conditions, what allows us that the operator that appears in the Cauchy problem is the infinitesimal gener...

13. Semigroup theory applied to options

Directory of Open Access Journals (Sweden)

D. I. Cruz-Báez

2002-01-01

function of the current value of the underlying asset and time, verifies a Cauchy problem. We give new conditions for the existence and uniqueness of the value of a European option by using semigroup theory. For this, we choose a suitable space that verifies some conditions, what allows us that the operator that appears in the Cauchy problem is the infinitesimal generator of a C0-semigroup T(t. Then we are able to guarantee the existence and uniqueness of the value of a European option and we also achieve an explicit expression of that value.

14. Applied Linguistics: The Challenge of Theory

Science.gov (United States)

McNamara, Tim

2015-01-01

Language has featured prominently in contemporary social theory, but the relevance of this fact to the concerns of Applied Linguistics, with its necessary orientation to practical issues of language in context, represents an ongoing challenge. This article supports the need for a greater engagement with theory in Applied Linguistics. It considers…

15. Applied Game Theory and Strategic Behavior

CERN Document Server

Geckil, Ilhan K

2009-01-01

Presenting topics from a practical point of view, "Applied Game Theory and Strategic Behavior" illustrates how game theory can be used to solve real problems in public policy and the business world. This book demonstrates the benefits of using strategic thinking that incorporates aspects of uncertainty about the behavior of other parties. It offers a rigorous definition of game theory with detailed descriptions of different forms of games, the context of game theory, and the basic assumptions of the theory. This book includes the application areas of business, management, government,

16. The Moral Self: Applying Identity Theory

Science.gov (United States)

Stets, Jan E.; Carter, Michael J.

2011-01-01

This research applies identity theory to understand the moral self. In identity theory, individuals act on the basis of their identity meanings, and they regulate the meanings of their behavior so that those meanings are consistent with their identity meanings. An inconsistency produces negative emotions and motivates individuals to behave…

17. Rigorous diffraction theory applied to microlenses

OpenAIRE

Blattner, Peter; Herzig, Hans-Peter

2007-01-01

In this paper, we discuss the behaviour of small cylindrical microlenses, arranged in one-dimensional arrays and as single elements. For this purpose, we apply a standard rigorous diffraction theory, commonly used for diffraction gratings. We investigate the coupling effect between the elements. It turns out that single elements behave like periodic elements if the spacing is chosen correctly. Furthermore, we compute the complex transmission function by rigorous diffraction theory and compare...

18. Applied game theory and optimal mechanism design

OpenAIRE

Zhang, Qi

2014-01-01

This thesis applies game theory to study optimal toehold bidding strategies during takeover competition, the problem of optimal design of voting rules and the design of package bidding mechanism to implement the core allocations. It documents three different research questions that are all related to auction theory. Chapter 2 develops a two-stage takeover game to explain toehold puzzle in the context of takeover. Potential bidders are allowed to acquire target shares in the open market, subje...

19. Belbin's Team role theory applied to musicgroups

OpenAIRE

Qvick, Erik Robert, 1973-

2015-01-01

Can R Meredith Belbin´s team role theory be applied to applied to music groups? Could team role behavior have a impact on team work and group dynamic, and also on the success and productivity of a music group? This research analyzes the application of Belbin team role theory on three music groups consisting of Icelandic professional musicians to shed light on the possibilities of such relationships. The research examine the possibilities of relationships between team role behavior and it´s im...

20. Applied group theory selected readings in physics

CERN Document Server

Cracknell, Arthur P

1968-01-01

Selected Readings in Physics: Applied Group Theory provides information pertinent to the fundamental aspects of applied group theory. This book discusses the properties of symmetry of a system in quantum mechanics.Organized into two parts encompassing nine chapters, this book begins with an overview of the problem of elastic vibrations of a symmetric structure. This text then examines the numbers, degeneracies, and symmetries of the normal modes of vibration. Other chapters consider the conditions under which a polyatomic molecule can have a stable equilibrium configuration when its electronic

1. Attachment Theory Applied to Juvenile Sex Offending.

Science.gov (United States)

Goodrow, Kenneth K.; Lim, Mee-Gaik

1998-01-01

Attachment theory is applied to identify systemic patterns encouraging juveniles to commit sexual offenses. The role of the helping system in perpetuating offenses is reviewed. The priority of family integrity and the role of professionals in breaking cycles of abuse and repairing earlier destructive emotional attachments are discussed. (EMK)

2. Towards applied theories based on computability logic

CERN Document Server

Japaridze, Giorgi

2008-01-01

Computability logic (CL) (see http://www.cis.upenn.edu/~giorgi/cl.html) is a recently launched program for redeveloping logic as a formal theory of computability, as opposed to the formal theory of truth that logic has more traditionally been. Formulas in it represent computational problems, "truth" means existence of an algorithmic solution, and proofs encode such solutions. Within the line of research devoted to finding axiomatizations for ever more expressive fragments of CL, the present paper introduces a new deductive system CL12 and proves its soundness and completeness with respect to the semantics of CL. Conservatively extending classical predicate calculus and offering considerable additional expressive and deductive power, CL12 presents a reasonable, computationally meaningful, constructive alternative to classical logic as a basis for applied theories. To obtain a model example of such theories, this paper rebuilds the traditional, classical-logic-based Peano arithmetic into a computability-logic-b...

3. High resolution NMR theory and chemical applications

CERN Document Server

Becker, Edwin D

1969-01-01

High Resolution NMR: Theory and Chemical Applications focuses on the applications of nuclear magnetic resonance (NMR), as well as chemical shifts, lattices, and couplings. The book first offers information on the theory of NMR, including nuclear spin and magnetic moment, spin lattice relaxation, line widths, saturation, quantum mechanical description of NMR, and ringing. The text then ponders on instrumentation and techniques and chemical shifts. Discussions focus on the origin of chemical shifts, reference compounds, empirical correlations of chemical shifts, modulation and phase detection,

4. Quasi-chemical Theories of Associated Liquids

CERN Document Server

Pratt, L R; Pratt, Lawrence R.; Violette, Randall A. La

1998-01-01

It is shown how traditional development of theories of fluids based upon the concept of physical clustering can be adapted to an alternative local clustering definition. The alternative definition can preserve a detailed valence description of the interactions between a solution species and its near-neighbors, i.e., cooperativity and saturation of coordination for strong association. These clusters remain finite even for condensed phases. The simplest theory to which these developments lead is analogous to quasi-chemical theories of cooperative phenomena. The present quasi-chemical theories require additional consideration of packing issues because they don't impose lattice discretizations on the continuous problem. These quasi-chemical theories do not require pair decomposable interaction potential energy models. Since calculations may be required only for moderately sized clusters, we suggest that these quasi-chemical theories could be implemented with computational tools of current electronic structure the...

5. Modeling in applied sciences a kinetic theory approach

CERN Document Server

Pulvirenti, Mario

2000-01-01

Modeling complex biological, chemical, and physical systems, in the context of spatially heterogeneous mediums, is a challenging task for scientists and engineers using traditional methods of analysis Modeling in Applied Sciences is a comprehensive survey of modeling large systems using kinetic equations, and in particular the Boltzmann equation and its generalizations An interdisciplinary group of leading authorities carefully develop the foundations of kinetic models and discuss the connections and interactions between model theories, qualitative and computational analysis and real-world applications This book provides a thoroughly accessible and lucid overview of the different aspects, models, computations, and methodology for the kinetic-theory modeling process Topics and Features * Integrated modeling perspective utilized in all chapters * Fluid dynamics of reacting gases * Self-contained introduction to kinetic models * Becker–Doring equations * Nonlinear kinetic models with chemical reactions * Kinet...

6. Bundle Gerbes Applied to Quantum Field Theory

CERN Document Server

Carey, A L; Murray, M; Carey, Alan; Mickelsson, Jouko; Murray, Michael

2000-01-01

This paper reviews recent work on a new geometric object called a bundle gerbe and discusses some new examples arising in quantum field theory. One application is to an Atiyah-Patodi-Singer index theory construction of the bundle of fermionic Fock spaces parametrized by vector potentials in odd space dimensions and a proof that this leads in a simple manner to the known Schwinger terms (Mickelsson-Faddeev cocycle) for the gauge group action. This gives an explicit computation of the Dixmier-Douady class of the associated bundle gerbe. The method works also in other cases of fermions in external fields (external gravitational field, for example) provided that the APS theorem can be applied; however, we have worked out the details only in the case of vector potentials. Another example, in which the bundle gerbe curvature plays a role, arises from the WZW model on Riemann surfaces. A further example is the existence of string structures' question. We conclude by showing how global Hamiltonian anomalies fit with...

7. Using game theory to improve safety within chemical industrial parks

CERN Document Server

Reniers, Genserik

2013-01-01

Though the game-theoretic approach has been vastly studied and utilized in relation to economics of industrial organizations, it has hardly been used to tackle safety management in multi-plant chemical industrial settings. Using Game Theory for Improving Safety within Chemical Industrial Parks presents an in-depth discussion of game-theoretic modelling which may be applied to improve cross-company prevention and -safety management in a chemical industrial park.   By systematically analyzing game-theoretic models and approaches in relation to managing safety in chemical industrial parks, Using Game Theory for Improving Safety within Chemical Industrial Parks explores the ways game theory can predict the outcome of complex strategic investment decision making processes involving several adjacent chemical plants. A number of game-theoretic decision models are discussed to provide strategic tools for decision-making situations.   Offering clear and straightforward explanations of methodologies, Using Game Theor...

8. Decision theory applied to radioactive repository construction

International Nuclear Information System (INIS)

The objective of this article is to present, through the presentation of an example, the applicability of the decision theory on the selection and construction of a repository for low and intermediate radioactive waste. (author)

9. Fairness theory applied to strategic alliance negotiations

OpenAIRE

2012-01-01

This thesis investigates negotiation processes during strategic alliance formations between venture capital firms and start-up companies by empirically assessing previous literature on negotiation theory and further developing the understanding of fairness theory. The lack of empirical evidence surrounding alliances between venture capital firms and start-up companies is the basis for this research. Cross-sectional data have been obtained from seven different successful cases of short-term in...

10. Chemical organization theory: towards a theory of constructive dynamical systems

OpenAIRE

Dittrich, Peter; di Fenizio, Pietro Speroni

2005-01-01

Complex dynamical networks consisting of many components that interact and produce each other are difficult to understand, especially, when new components may appear. In this paper we outline a theory to deal with such systems. The theory consists of two parts. The first part introduces the concept of a chemical organization as a closed and mass-maintaining set of components. This concept allows to map a complex (reaction) network to the set of organizations, providing a new view on the syste...

11. Applying Lakatos' Theory to the Theory of Mathematical Problem Solving.

Science.gov (United States)

Nunokawa, Kazuhiko

1996-01-01

The relation between Lakatos' theory and issues in mathematics education, especially mathematical problem solving, is investigated by examining Lakatos' methodology of a scientific research program. (AIM)

12. Quark soup al dente: applied superstring theory

International Nuclear Information System (INIS)

In recent years, experiments have discovered an exotic new state of matter known as the strongly coupled quark-gluon plasma (sQGP). At present, it seems that standard theoretical tools, such as perturbation theory and lattice gauge theory, are poorly suited to understand this new phase. However, recent progress in superstring theory has provided us with a theoretical laboratory for studying very similar systems of strongly interacting hot non-Abelian plasmas. This surprising new perspective extracts the fluid properties of the sQGP from physical processes in a black hole spacetime. Hence we may find the answers to difficult particle physics questions about the sQGP from straightforward calculations in classical general relativity

13. Decision theory applied to rare events

International Nuclear Information System (INIS)

The decision theory that is more or less dedicated to reinforce the basis of classical statistics, seems to have reached an opposite results, strongly justifying Bayesian methods. This may lead to remove reserves to the use of probabilistic and 'statistic' methods in the case of rare events. However, a thorough examination of the theory's concepts and axioms leads to requirements that may be difficult to satisfy in the framework of the definition itself of rare events. A collective effort to respond to these requirements would be extremely desirable; it could contribute to enhance the present situation through a better consensus on risk assessment

14. A Unified Theory of Chemical Reactions

CERN Document Server

Aubry, S

2014-01-01

We propose a new and general formalism for elementary chemical reactions where quantum electronic variables are used as reaction coordinates. This formalism is in principle applicable to all kinds of chemical reactions ionic or covalent. Our theory reveals the existence of an intermediate situation between ionic and covalent which may be almost barrierless and isoenegetic and which should be of high interest for understanding biochemistry.

15. Applying Adapted Big Five Teamwork Theory to Agile Software Development

OpenAIRE

Strode, Diane

2016-01-01

Teamwork is a central tenet of agile software development and various teamwork theories partially explain teamwork in that context. Big Five teamwork theory is one of the most influential teamwork theories, but prior research shows that the team leadership concept in this theory it is not applicable to agile software development. This paper applies an adapted form of Big Five teamwork theory to cases of agile software development. Three independent cases were drawn from a single organisation....

16. Engineering emergence: applied theory for game design

OpenAIRE

Scha, R.J.H.; Brunekreef, J.J.; Dormans, J.

2012-01-01

Joris Dormans ontwikkelde softwaretools om het ontwerpen van games te ondersteunen en naar een hoger plan te tillen. Toegepaste theorie voor game design, zoals Dormans die voorstelt, is er op gericht om creativiteit te ondersteunen, het ontwerpproces te versnellen, en de kwaliteit van games te verhogen. Hierbij spelen twee theoretische kaders een rol. Het eerste kader beschrijft games als systemen van spelregels, waarbij de onderlinge structuur van doorslaggevend belang is in het onvoorspelba...

17. Applied optimal control theory of distributed systems

CERN Document Server

Lurie, K A

1993-01-01

This book represents an extended and substantially revised version of my earlierbook, Optimal Control in Problems ofMathematical Physics,originally published in Russian in 1975. About 60% of the text has been completely revised and major additions have been included which have produced a practically new text. My aim was to modernize the presentation but also to preserve the original results, some of which are little known to a Western reader. The idea of composites, which is the core of the modern theory of optimization, was initiated in the early seventies. The reader will find here its implementation in the problem of optimal conductivity distribution in an MHD-generatorchannel flow.Sincethen it has emergedinto an extensive theory which is undergoing a continuous development. The book does not pretend to be a textbook, neither does it offer a systematic presentation of the theory. Rather, it reflects a concept which I consider as fundamental in the modern approach to optimization of dis­ tributed systems. ...

18. Using chemical organization theory for model checking

OpenAIRE

Kaleta, Christoph; Richter, Stephan; Dittrich, Peter

2009-01-01

Motivation: The increasing number and complexity of biomodels makes automatic procedures for checking the models' properties and quality necessary. Approaches like elementary mode analysis, flux balance analysis, deficiency analysis and chemical organization theory (OT) require only the stoichiometric structure of the reaction network for derivation of valuable information. In formalisms like Systems Biology Markup Language (SBML), however, information about the stoichiometric coefficients re...

19. Electric circuit theory applied electricity and electronics

CERN Document Server

Yorke, R

1981-01-01

Electric Circuit Theory provides a concise coverage of the framework of electrical engineering. Comprised of six chapters, this book emphasizes the physical process of electrical engineering rather than abstract mathematics. Chapter 1 deals with files, circuits, and parameters, while Chapter 2 covers the natural and forced response of simple circuit. Chapter 3 talks about the sinusoidal steady state, and Chapter 4 discusses the circuit analysis. The fifth chapter tackles frequency response of networks, and the last chapter covers polyphase systems. This book will be of great help to electrical

20. Nodal aberration theory applied to freeform surfaces

Science.gov (United States)

Fuerschbach, Kyle; Rolland, Jannick P.; Thompson, Kevin P.

2014-12-01

When new three-dimensional packages are developed for imaging optical systems, the rotational symmetry of the optical system is often broken, changing its imaging behavior and making the optical performance worse. A method to restore the performance is to use freeform optical surfaces that compensate directly the aberrations introduced from tilting and decentering the optical surfaces. In order to effectively optimize the shape of a freeform surface to restore optical functionality, it is helpful to understand the aberration effect the surface may induce. Using nodal aberration theory the aberration fields induced by a freeform surface in an optical system are explored. These theoretical predications are experimentally validated with the design and implementation of an aberration generating telescope.

1. Formulation in action: applying psychological theory to clinical practice

OpenAIRE

2016-01-01

When people seek psychological support, formulation is the theory-driven methodology used by many practitioners to guide identification of the processes, mechanisms, and patterns of behaviour that appear to be contributing to the presenting difficulties. However, the process of formulating – or applying psychological theory to practice – can often seem unclear. In this volume, we present multiple demonstrations of formulation in action – written by applied psychologists embedded in clinic...

2. General Applied Theory of Micropolar thin Elastic Shells

OpenAIRE

Sargsyan S.H.

2011-01-01

In the present paper on the basis of asymptotically confirmed hypotheses method, depending on the values of physical size-less parameters, there are constructed general applied two-dimensional theories of micropolar shells with independent rotation, constraint rotation, and with “small shift rigidity”. Transverse shift and related deformation are completely taken into account in constructing the mentioned theories.

3. Social Justice and Lesbian Feminism: Two Theories Applied to Homophobia

Directory of Open Access Journals (Sweden)

Denise L. Levy

2007-12-01

Full Text Available Trends in contemporary social work include the use of an eclectic theory base. In an effort to incorporate multiple theories, this article will examine the social problem of homophobia using two different theoretical perspectives: John Rawls’ theory of social justice and lesbian feminist theory.Homophobia, a current social problem, can be defined as “dislike or hatred toward homosexuals, including both cultural and personal biases against homosexuals” (Sullivan, 2003, p. 2. Rawls’ theory of justice and lesbian feminist theory are especially relevant to the issue of homophobia and provide a useful lens to understanding this social problem. In this article, these two theories will be summarized, applied to the issue of homophobia, and compared and contrasted based on their utility.

4. Device for applying organic chemicals to lysimeter surfaces

International Nuclear Information System (INIS)

One of the aims of environmental research at the GSF Research Centre for the Environment and Health is to determine the behaviour of environmentally consequential chemicals in terrestrial ecosystems under as natural conditions as possible. The GSF lysimeter plant in Neuherberg permits studying the environmental behaviour of organic chemicals in different soils. Collaborators at GSF have developed a means of applying -14-marked substances in field lysimeters so as to be able to refind released chemicals, identify their conversion products and set up mass balances for the chemicals

5. HUMAN RIGHTS AND PROSPECTS FOR APPLYING CHEMICAL CASTRATION IN RUSSIA

OpenAIRE

Suzanna Karoevna ABRAMYAN; Arseny Igorevich ZAITSEV; Igor Stanislavovich DMITRIYEV

2015-01-01

I The paper examined challenges related to applying chemical castration the Russian community has faced, and assessed the prospect for further implementation as well. The issue has triggered an ample debate in various circles as a new probable way to prevent sexual crime events. The authors inferred that chemical castration should be an option of a complex of measures for pre-venting relapse into pedophilia.

6. HUMAN RIGHTS AND PROSPECTS FOR APPLYING CHEMICAL CASTRATION IN RUSSIA

Directory of Open Access Journals (Sweden)

Suzanna Karoevna ABRAMYAN

2015-02-01

Full Text Available I The paper examined challenges related to applying chemical castration the Russian community has faced, and assessed the prospect for further implementation as well. The issue has triggered an ample debate in various circles as a new probable way to prevent sexual crime events. The authors inferred that chemical castration should be an option of a complex of measures for pre-venting relapse into pedophilia.

7. DUALITY, OPTIMIZATION, AND MICROECONOMIC THEORY: PITFALLS FOR THE APPLIED RESEARCHER

OpenAIRE

Taylor, C. Robert

1989-01-01

This article graphically illustrates the one-to-one duality mapping among the production function, the product supply equation, the derived factor demand equation, and the indirect profit function for the classical profit maximization problem. This pedagogical framework is then used to illustrate how empirical application of conventional duality theory can lead to distorted empirical results if the theory (e.g. HotellingÂ’s lemma) does not apply because the firm is not a profit maximizer or b...

8. Dynamical Mean Field Approximation Applied to Quantum Field Theory

CERN Document Server

Akerlund, Oscar; Georges, Antoine; Werner, Philipp

2013-01-01

We apply the Dynamical Mean Field (DMFT) approximation to the real, scalar phi^4 quantum field theory. By comparing to lattice Monte Carlo calculations, perturbation theory and standard mean field theory, we test the quality of the approximation in two, three, four and five dimensions. The quantities considered in these tests are the critical coupling for the transition to the ordered phase and the associated critical exponents nu and beta. We also map out the phase diagram in four dimensions. In two and three dimensions, DMFT incorrectly predicts a first order phase transition for all bare quartic couplings, which is problematic, because the second order nature of the phase transition of lattice phi^4-theory is crucial for taking the continuum limit. Nevertheless, by extrapolating the behaviour away from the phase transition, one can obtain critical couplings and critical exponents. They differ from those of mean field theory and are much closer to the correct values. In four dimensions the transition is sec...

9. Molecular orbital calculations using chemical graph theory

CERN Document Server

Dias, Jerry Ray

1993-01-01

Professor John D. Roberts published a highly readable book on Molecular Orbital Calculations directed toward chemists in 1962. That timely book is the model for this book. The audience this book is directed toward are senior undergraduate and beginning graduate students as well as practicing bench chemists who have a desire to develop conceptual tools for understanding chemical phenomena. Although, ab initio and more advanced semi-empirical MO methods are regarded as being more reliable than HMO in an absolute sense, there is good evidence that HMO provides reliable relative answers particularly when comparing related molecular species. Thus, HMO can be used to rationalize electronic structure in 1t-systems, aromaticity, and the shape use HMO to gain insight of simple molecular orbitals. Experimentalists still into subtle electronic interactions for interpretation of UV and photoelectron spectra. Herein, it will be shown that one can use graph theory to streamline their HMO computational efforts and to arrive...

10. Equity valuation – Grupo Semapa : firm valuation theory applied

OpenAIRE

Patrão, Miguel Santos Fonseca

2013-01-01

This dissertation aims to value the intrinsic value of the holding Semapa, applying the Equity Valuation theory. In order to apply the most suitable methods and appropriate assumptions, this paper firstly outlines the existing valuation frameworks and techniques, along with the academic debates on the most relevant valuation topics. The valuation is done as the sum of the parts of the companies owned by Semapa – Portucel, Secil, ETSA and Supremo – using a Discounted Cash Flow approach and the...

11. Chemical Graph Theory--The Mathematical Connection

Science.gov (United States)

Gutman, Ivan

The impact that research done in chemical graph theory (CGT) had and has on "serious" or "pure" mathematics is examined. Although this impact is minor, it is not fully negligible. By means of two case studies we intend to demonstrate the following general features of the CGT --> Mathematics connection: (a) Scholars familiar with chemistry design a mathematical model of the examined chemical phenomena; (b) such a model may require the usage of non-trivial mathematical objects and methods, and may lead to difficult and interesting mathematical problems; (c) in order to grasp the significance of a particular mathematical object/method/problem of CGT, mathematicians need a very long time, sometimes as much as 20-30 years; (d) once this significance is recognized, a vigorous mathematical research begins; (e) mathematicians usually generalize and extend the original object/method/problem of CGT, and the results they obtain may be lacking value for CGT. The two case studies pertain to the graph energy and the connectivity (or Randic) index.

12. Applying Directed Graph Theory to Faculty Contact Structure.

Science.gov (United States)

House, Ernest R.; Long, John M.

Although recent writings indicate the importance of personal contact structures in diffusing innovations and in determining perceptions, the internal contact structure of the school faculty remains unexamined. This study applies directed graph theory, a new branch of mathematics, to analyzing school contact structure. Sociometric data and…

13. Designing IS Curricula for Practical Relevance: Applying Baseball's "Moneyball" Theory

Science.gov (United States)

Surendra, Nanda C.; Denton, James W.

2009-01-01

Baseball's "Moneyball" theory states that the baseball market undervalues some attributes (and players with these attributes) that are key contributors to wins while overvaluing other attributes. Teams who correctly evaluate attributes that contribute to wins have higher winning percentages with relatively low payrolls. We applied the Moneyball…

14. Faculty Forum: Applying Motivation Theory to Real-World Problems

Science.gov (United States)

Harpine, Elaine Clanton

2007-01-01

This article examines the effectiveness of incorporating an applied learning experience in an upper level undergraduate motivation theory class. In this 3-part course requirement, students (a) participated in a 2-hr field experience, (b) completed a homework assignment based on their participation, and (c) worked in groups to develop a deeper…

15. Variation Theory Applied to Students' Conceptions of Computer Programming

Science.gov (United States)

Thune, Michael; Eckerdal, Anna

2009-01-01

The present work has its focus on university-level engineering education students that do not intend to major in computer science but still have to take a mandatory programming course. Phenomenography and variation theory are applied to empirical data from a study of students' conceptions of computer programming. A phenomenographic outcome space…

16. Chemical applications of molecular quantum theory

International Nuclear Information System (INIS)

Molecular systems of chemical interest are investigated with the aid of molecular quantum theory. The self-consistent field (SCF) method is used to predict the molecular structures of ClF2, ClF4 and Cl3 radicals, and the ions ClF2+, ClF2-, ClF4+ and ClF4-. The ClF2 and Cl3 radicals are predicted to be bent with bond angles of 145.20 and 158.60, respectively, while the ions ClF2+ and ClF2- are predicted to be bent with a bond angle of 97.40 and linear, respectively. The geometry predictions for the ClF4 radical and the ClF4+ ion are found to be notably basis set dependent. The ClF4- ion is predicted to be square-planar. Multi-configuration self-consistent field (MCSCF) calculations have yielded the dipole moment function for the 1sigma+ state of HI, which qualitatively confirms the experimental finding that the dipole derivative at R/sub e/ is negative. The 2sigma+ F + H2 potential energy surface is studied extensively with the configuration interaction (CI) method. The most complete calculations yield an activation energy of 2.74 kcal/mole and an exothermicity of 30.0 kcal/mole. The production of a potential energy surface of ''chemical accuracy'' for this system is found to be more difficult than previously believed. The simplest hydrophobic model, the water-methane system, is studied with the SCF method in order to determine the nature and magnitude of the interaction. The most favorable geometric arrangement corresponds to an attraction of 0.5 kcal/mole

17. Nenad Trinajstić – Pioneer of Chemical Graph Theory

OpenAIRE

Randić, Milan

2004-01-01

We present a brief overview of many contributions of Nenad Trinajstić to Chemical Graph Theory, an important and fast developing branch of Theoretical Chemistry. In addition, we outline briefly the various activities of Trinajstić within the chemical community of Croatia. As can be seen, his scientific work has been very productive and has not abated despite the hostilities towards the Chemical Graph Theory in certain chemical circles over the past 30 years. On the contrary, Trinajstić con...

18. Spectral analysis and filter theory in applied geophysics

CERN Document Server

Buttkus, Burkhard

2000-01-01

This book is intended to be an introduction to the fundamentals and methods of spectral analysis and filter theory and their appli­ cations in geophysics. The principles and theoretical basis of the various methods are described, their efficiency and effectiveness eval­ uated, and instructions provided for their practical application. Be­ sides the conventional methods, newer methods arediscussed, such as the spectral analysis ofrandom processes by fitting models to the ob­ served data, maximum-entropy spectral analysis and maximum-like­ lihood spectral analysis, the Wiener and Kalman filtering methods, homomorphic deconvolution, and adaptive methods for nonstation­ ary processes. Multidimensional spectral analysis and filtering, as well as multichannel filters, are given extensive treatment. The book provides a survey of the state-of-the-art of spectral analysis and fil­ ter theory. The importance and possibilities ofspectral analysis and filter theory in geophysics for data acquisition, processing an...

19. Superconductivity theory applied to the periodic table of the elements

International Nuclear Information System (INIS)

The modern theory of superconductivity, based upon the BCS to Bose-Einstein transition, is applied to the periodic table of the elements, in order to isolate the essential features of high temperature superconductivity and to predict its occurrence within the periodic table. It is predicted that Sodium-Ammonia, Sodium Zinc Phosphide and Bismuth (I) Iodide are promising materials for experimental explorations of high temperature superconductivity

20. Superconductivity theory applied to the periodic table of the elements

Science.gov (United States)

Elifritz, Thomas Lee

1995-01-01

The modern theory of superconductivity, based upon the BCS to Bose-Einstein transition is applied to the periodic table of the elements, in order to isolate the essential features of of high temperature superconductivity and to predict its occurrence with the periodic table. It is predicted that Sodium-Ammonia, Sodium Zinc Phosphide and Bismuth (I) Iodide are promising materials for experimental explorations of high temperature superconductivity.

1. Applying Metacognitive Theories to Cultivating English Learner Autonomy in College

Institute of Scientific and Technical Information of China (English)

张献

2013-01-01

The ultimate goal of modern education is to develop students’learner autonomy and make them autonomous and life⁃long learners and many researches have found that learner autonomy is greatly influenced by metacognition. So this paper intends to analyze the present teaching and learning situation in college and give a clear picture of the relationship of learn autonomy and metacognition, trying to find the ways to cultivate learner autonomy through applying metacognitive theories college.

2. From Optimal Tax Theory to Applied Tax Policy

OpenAIRE

Jacobs, Bas

2013-01-01

This paper aims to provide a perspective on the ideal tax system using insights from optimal-tax theory supplemented with empirical evidence. These insights are applied to actual policy questions regarding the progressiveness of the labor income tax, in-work tax credits, the design of the capital income tax, the taxation of housing and pensions, the role of indirect taxes, optimal environmental taxes, and corrective taxes on alcohol and tobacco.

3. Bridging the Gap? Leadership Theories Applied in Distance Settings

OpenAIRE

Gahlawat, Vijay Singh; Nielson, Melissa

2012-01-01

This current global context is full of both increasing opportunities, and increasing demands that are placed both on the corporations and the employees working within them. As the physical distances between leaders and followers widens, more emphasis will need to be placed on applying traditional benchmark leadership approaches and theories to this context. The study explores and highlights the following issues connected to distance management: How is the full range leadership model, includin...

4. Superconductivity theory applied to the periodic table of the elements

Energy Technology Data Exchange (ETDEWEB)

Elifritz, T.L. [Information Corporation, Madison, WI (United States)

1994-12-31

The modern theory of superconductivity, based upon the BCS to Bose-Einstein transition, is applied to the periodic table of the elements, in order to isolate the essential features of high temperature superconductivity and to predict its occurrence within the periodic table. It is predicted that Sodium-Ammonia, Sodium Zinc Phosphide and Bismuth (I) Iodide are promising materials for experimental explorations of high temperature superconductivity.

5. Fresnel-Kirchhoff theory applied to terrain diffraction problems

Science.gov (United States)

Whitteker, J. H.

1990-09-01

Fresnel-Kirchhoff theory is adapted to the problem of finding the diffraction attenuation at VHF and UHF over terrain profiles of arbitrary shape. Approximations are based on the assumptions of small wavelength and small diffraction angles. As a preliminary step, the theory is applied to the multiple-knife-edge problem. The field is found as a function of height above each knife edge in turn. In an application of Huygens' principle, an integration over the field above one knife edge provides the field at any point above the next. This formulation is equivalent to knife-edge formulations used in the past. Then each pair of neighboring knife edges is bridged with an imperfectly reflecting plane surface, representing the terrain. Huygens' principle is used again for the reflected wave, neglecting backscatter. The field found in this way is accurate for a good reflector but not a poor one. An analytical comparison shows agreement with rigorous diffraction theory for the problem of a plane wave incident on a perfectly reflecting wedge. Numerical comparisons with rigorous diffraction theory for a spherical Earth and for a small-radius hill (approximated with linear segments) show agreement to within 1.5 dB for the parameters chosen.

6. Applying strategic management theories in public sector organizations

DEFF Research Database (Denmark)

Hansen, Jesper Rosenberg; Ewan, Ferlie

2016-01-01

This article discusses the utility of two different strategic management theories in different types of public organizations including contemporary New Public Management-based public organizations, namely Porter's strategic positioning model and the resource-based view of strategy. We argue that...... possibiliteis for applying these theories vary depending on the type of public organizations involved, and are les appropriate in traditional settings but more relevant in autonomized and market-like service-delivery organizations. We further propose that their increased applicability depends on three specific...... conditions: the degree of administrative autonomy, performance-based budgeting and market-like competition. We give empirical examples drawn from public servives in the UK and Denmark. We call for more exploration of these (and other) strategic management approaches within contemporary public services...

7. Teaching organization theory for healthcare management: three applied learning methods.

Science.gov (United States)

Olden, Peter C

2006-01-01

Organization theory (OT) provides a way of seeing, describing, analyzing, understanding, and improving organizations based on patterns of organizational design and behavior (Daft 2004). It gives managers models, principles, and methods with which to diagnose and fix organization structure, design, and process problems. Health care organizations (HCOs) face serious problems such as fatal medical errors, harmful treatment delays, misuse of scarce nurses, costly inefficiency, and service failures. Some of health care managers' most critical work involves designing and structuring their organizations so their missions, visions, and goals can be achieved-and in some cases so their organizations can survive. Thus, it is imperative that graduate healthcare management programs develop effective approaches for teaching OT to students who will manage HCOs. Guided by principles of education, three applied teaching/learning activities/assignments were created to teach OT in a graduate healthcare management program. These educationalmethods develop students' competency with OT applied to HCOs. The teaching techniques in this article may be useful to faculty teaching graduate courses in organization theory and related subjects such as leadership, quality, and operation management. PMID:16566496

8. Applying Diffusion of Innovation Theory to Intervention Development.

Science.gov (United States)

Dearing, James W

2009-09-01

Few social science theories have a history of conceptual and empirical study as long as does the diffusion of innovations. The robustness of this theory derives from the many disciplines and fields of study in which diffusion has been studied, from the international richness of these studies, and from the variety of new ideas, practices, programs, and technologies that have been the objects of diffusion research. Early theorizing from the beginning of the 20th century was gradually displaced by post hoc empirical research that described and explained diffusion processes. By the 1950s, diffusion researchers had begun to apply the collective knowledge learned about naturalistic diffusion in tests of process interventions to affect the spread of innovations. Now, this purposive objective has given form to a science of dissemination in which evidence-based practices are designed a priori not just to result in internal validity but to increase the likelihood that external validity and diffusion both are more likely to result. Here, I review diffusion theory and focus on seven concepts-intervention attributes, intervention clusters, demonstration projects, societal sectors, reinforcing contextual conditions, opinion leadership, and intervention adaptation-with potential for accelerating the spread of evidence-based practices, programs, and policies in the field of social work. PMID:20976022

9. Quasi-chemical Theories of Associated Liquids

OpenAIRE

Pratt, Lawrence R.; LaViolette, Randall A.

1998-01-01

It is shown how traditional development of theories of fluids based upon the concept of physical clustering can be adapted to an alternative local clustering definition. The alternative definition can preserve a detailed valence description of the interactions between a solution species and its near-neighbors, i.e., cooperativity and saturation of coordination for strong association. These clusters remain finite even for condensed phases. The simplest theory to which these developments lead i...

10. Fluctuation theory of solutions applications in chemistry, chemical engineering, and biophysics

CERN Document Server

Smith, Paul E

2013-01-01

There are essentially two theories of solutions that can be considered exact: the McMillan-Mayer theory and Fluctuation Solution Theory (FST). The first is mostly limited to solutes at low concentrations, while FST has no such issue. It is an exact theory that can be applied to any stable solution regardless of the number of components and their concentrations, and the types of molecules and their sizes. Fluctuation Theory of Solutions: Applications in Chemistry, Chemical Engineering, and Biophysics outlines the general concepts and theoretical basis of FST and provides a range of applications

11. Thermal ignition theory applied to diesel engine autoignition

Energy Technology Data Exchange (ETDEWEB)

Mellor, A.M.; Russell, S.C. [Vanderbilt Univ., Mechanical Engineering Dept., Nashville, TN (United States); Humer, S.; Seshadri, K. [California Univ., Mechanical and Aerospace Engineering Dept., San Diego, La Jolla, CA (United States)

2004-06-01

The diesel community has used one-equation models for ignition delay in engines for decades. The inverse Arrhenius forms characterizing many of these expressions thus lump together liquid fuel evaporation, mixing of the vapour with the charge and the chemical delay. As a result, correlations apply only to the injector, engine and operating conditions tested. Additionally, they typically exhibit energies or temperatures of activation that can be as much as ten times lower than those obtained in well-mixed, controlled systems that isolate and study the chemical delay. Here the latter system is modelled first, using classical analysis techniques. The result is then extended to the relatively straightforward fluid mechanic environment of a laminar counterflow burner to clarify how both chemistry and mixing can be included in a more general one-equation model. This new model is validated with ignition limit data for ethane or ethene with O{sub 2}/N{sub 2} either premixed or unmixed in the counterflow arrangement and liquid diesel fuel in a pool configuration. Since the overall mixing time in this burner is known a priori, the data can be manipulated to yield global chemical ignition delay activation temperatures for these fuels. As expected, the results are equivalent to those measured in shock tubes and combustion tunnels where reactants are premixed before ignition. (Author)

12. The correlation theory of the chemical bond

OpenAIRE

Szalay, Szilárd; Barcza, Gergely; Szilvási, Tibor; Veis, Libor; Legeza, Örs

2016-01-01

The notion of chemical bond is a very useful concept in chemistry. It originated at the beginning of chemistry, it is expressive for the classically thinking mind, and the errors arising from the approximative nature of the concept can often be ignored. In the first half of the twentieth century, however, we learned that the proper description of the microworld is given by quantum mechanics. Quantum mechanics gives more accurate results for chemical systems than any preceding model, however, ...

13. The correlation theory of the chemical bond

CERN Document Server

Szalay, Szilárd; Szilvási, Tibor; Veis, Libor; Legeza, Örs

2016-01-01

The notion of chemical bond is a very useful concept in chemistry. It originated at the beginning of chemistry, it is expressive for the classically thinking mind, and the errors arising from the approximative nature of the concept can often be ignored. In the first half of the twentieth century, however, we learned that the proper description of the microworld is given by quantum mechanics. Quantum mechanics gives more accurate results for chemical systems than any preceding model, however, it is very inexpressive for the classically thinking mind. The quantum mechanical description of the chemical bond is given in terms of delocalized bonding orbitals, or, alternatively, in terms of correlations of occupations of localized orbitals. However, in the latter case, multiorbital correlations were treated only in terms of two-orbital correlations, although the structure of multiorbital correlations is far richer; and, in the case of bonds established by more than two electrons, multiorbital correlations represent...

14. Applying Adult Learning and Development Theories to Educational Practice

Science.gov (United States)

2011-01-01

A study was conducted to determine the degree of correlation that adult learning theories and adult developmental theories have with educational practice. Two adult learning theories, Malcolm Knowles' phase theories and Daniel Levinson's developmental theories, were researched to determine their relevance to three components of a nontraditional…

15. Andreev-Lifshitz Theory Applied to Normal Solids under Pressure

Science.gov (United States)

Sears, Matthew; Saslow, Wayne

2011-03-01

On letting the superfluid density go to zero, the Andreev-Lifshitz hydrodynamic theory of supersolids becomes applicable to an ordinary solid. Under applied pressure Pa , needed to produce solid He 3 and He 4 or to be of geophysical relevance, the system has both an elastic stress λik and an internal pressure P , with Pδik =Paδik +λik in equilibrium. P may be thought of as being due to a vacancy fluid. For Pa small compared to the bulk modulus, Maxwell relations give P ~Pa2 . The dynamical equations lead to three sets of propagating elastic modes (longitudinal and transverse sound) and two diffusive modes (one largely of entropy density and one largely of vacancy density -- or, more generally, defect density), all of which we study for non-zero Pa . The vacancy diffusion mode has diffusion constant DL ~Pa2 , and is diffusive because its associated internal pressure fluctuation P ' nearly cancels its lattice stress fluctuation λ 'ik . This mode permits the system to respond differently to transducers with different surface treatments. We specifically have in mind solid 4 He, which requires Pa ~ 25 bars to solidify; however, the results should apply to any solid under pressure. Supported by Department of Energy grant DE-FG02-06ER46278.

16. Testing Turing’s theory of morphogenesis in chemical cells

Science.gov (United States)

Tompkins, Nathan; Li, Ning; Girabawe, Camille; Heymann, Michael; Ermentrout, G. Bard; Epstein, Irving R.; Fraden, Seth

2014-01-01

Alan Turing, in “The Chemical Basis of Morphogenesis” [Turing AM (1952) Philos Trans R Soc Lond 237(641):37–72], described how, in circular arrays of identical biological cells, diffusion can interact with chemical reactions to generate up to six periodic spatiotemporal chemical structures. Turing proposed that one of these structures, a stationary pattern with a chemically determined wavelength, is responsible for differentiation. We quantitatively test Turing’s ideas in a cellular chemical system consisting of an emulsion of aqueous droplets containing the Belousov–Zhabotinsky oscillatory chemical reactants, dispersed in oil, and demonstrate that reaction-diffusion processes lead to chemical differentiation, which drives physical morphogenesis in chemical cells. We observe five of the six structures predicted by Turing. In 2D hexagonal arrays, a seventh structure emerges, incompatible with Turing’s original model, which we explain by modifying the theory to include heterogeneity. PMID:24616508

17. Closing in on chemical bonds by opening up relativity theory.

Science.gov (United States)

Whitney, Cynthia K

2008-03-01

This paper develops a connection between the phenomenology of chemical bonding and the theory of relativity. Empirical correlations between electron numbers in atoms and chemical bond stabilities in molecules are first reviewed and extended. Quantitative chemical bond strengths are then related to ionization potentials in elements. Striking patterns in ionization potentials are revealed when the data are viewed in an element-independent way, where element-specific details are removed via an appropriate scaling law. The scale factor involved is not explained by quantum mechanics; it is revealed only when one goes back further, to the development of Einstein's special relativity theory. PMID:19325749

18. Sensitivity theory applied to a transient thermal-hydraulics problem

Energy Technology Data Exchange (ETDEWEB)

Weber, C.F.; Oblow, E.M.

1979-10-01

A new method for sensitivity analysis of transient nonlinear problems is developed and applied to a reactor thermal-hydraulics problem. The method resembles the differential sensitivity methods currently used in the linear problems of reactor physics, but it is applicable to nonlinear systems as well. The equations governing heat transfer and fluid flow in a fuel pin and surrounding coolant are given and used to derive a second set of equations (commonly known as the adjoint equations) used in the sensitivity analysis. Both systems contain one second-order parabolic and one first-order hyperbolic partial differential equation. Difference equations are derived to approximate both systems and the convergence properties of these discrete systems are evaluated, yielding a useful analysis of the numerical solution. The solution functions are used to derive sensitivity coefficients for any desired integral response. These sensitivity coefficients are used in a first-order perturbation theory to predict changes in a response resulting from changes in parameter values. The results of a test problem are shown, verifying that this procedure is indeed useful for a wide variety of sensitivity calculations.

19. Chemical Product Design: A new challenge of applied thermodynamics

DEFF Research Database (Denmark)

Abildskov, Jens; Kontogeorgis, Georgios

2004-01-01

Chemical products involving specialty chemicals and microstructured materials are often multicomponent systems. A number of five to 20 molecules is not unusual, comprising a range of different chemical compounds e.g. polymers, surfactants, solid particles and water. Milk is an example of such a p......Chemical products involving specialty chemicals and microstructured materials are often multicomponent systems. A number of five to 20 molecules is not unusual, comprising a range of different chemical compounds e.g. polymers, surfactants, solid particles and water. Milk is an example...... of such a product involving both solid-liquid phases and (non-equilibrium) metastable states. Thus, many of these products are colloidal systems of different types, e.g. liquid-liquid emulsions, suspensions, powders, solid and liquid dispersions, aerosols and sprays. The physical chemistry (thermodynamics...

20. Why the binding theory doesn’t apply at LF

OpenAIRE

Hicks, Glyn

2008-01-01

This article argues that the relegation of the binding theory to the C-I interface (LF) is theoretically undesirable and empirically unwarranted. Recent Minimalist research has sought to eliminate the binding theory from UG by reducing its conditions to narrow-syntactic operations (Hornstein 2000, 2006; Reuland 2001, 2006; Kayne 2002; Zwart 2002, 2006; Hicks 2006). This approach remains controversial since the canonical Minimalist binding theory (Chomsky 1993; Chomsky and Lasnik 1993) views t...

1. The Chemical Technology Division at Argonne National Laboratory: Applying chemical innovation to environmental problems

International Nuclear Information System (INIS)

The Chemical Technology Division is one of the largest technical divisions at Argonne National Laboratory, a leading center for research and development related to energy and environmental issues. Since its inception in 1948, the Division has pioneered in developing separations processes for the nuclear industry. The current scope of activities includes R ampersand D on methods for disposing of radioactive and hazardous wastes and on energy conversion processes with improved efficiencies, lower costs, and reduced environmental impact. Many of the technologies developed by CMT can be applied to solve manufacturing as well as environmental problems of industry

2. Johnson-Kendall-Roberts theory applied to living cells

CERN Document Server

Chu, Y S; Thiery, J P; Pérez, E; Pincet, F; Chu, Yeh-Shiu; Dufour, Sylvie; Thiery, Jean Paul; Perez, Eric; Pincet, Frédéric

2005-01-01

Johnson-Kendall-Roberts (JKR) theory is an accurate model for strong adhesion energies of soft slightly deformable material. Little is known about the validity of this theory on complex systems such as living cells. We have addressed this problem using a depletion controlled cell adhesion and measured the force necessary to separate the cells with a micropipette technique. We show that the cytoskeleton can provide the cells with a 3D structure that is sufficiently elastic and has a sufficiently low deformability for JKR theory to be valid. When the cytoskeleton is disrupted, JKR theory is no longer applicable.

3. Applying RESRAD-CHEM for chemical risk assessment

International Nuclear Information System (INIS)

RESRAD-CHEM is a multiple pathway analysis computer code to evaluate chemically contaminated sites; it was developed at Argonne National Laboratory for the US Department of Energy. The code is designed to predict human health risks from exposure to hazardous chemicals and to derive cleanup criteria for chemically contaminated soils. It consists of environmental fate and transport models and is capable of predicting chemical concentrations over time in different environmental media. The methodology used in RESRAD-CHEM for exposure assessment and risk characterization follows the US Environmental Protection Agency's guidance on Human Health Evaluation for Superfund. A user-friendly interface is incorporated for entering data, operating the code, and displaying results. RESRAD-CHEM is easy to use and is a powerful tool to assess chemical risk from environmental exposure

4. Applying Diffusion of Innovation Theory to Intervention Development

Science.gov (United States)

Dearing, James W.

2009-01-01

Few social science theories have a history of conceptual and empirical study as long as does the diffusion of innovations. The robustness of this theory derives from the many disciplines and fields of study in which diffusion has been studied, from the international richness of these studies, and from the variety of new ideas, practices, programs,…

5. Applying Learning Theories and Instructional Design Models for Effective Instruction

Science.gov (United States)

Khalil, Mohammed K.; Elkhider, Ihsan A.

2016-01-01

Faculty members in higher education are involved in many instructional design activities without formal training in learning theories and the science of instruction. Learning theories provide the foundation for the selection of instructional strategies and allow for reliable prediction of their effectiveness. To achieve effective learning…

6. Attitude theory applied to in-store and online shopping

NARCIS (Netherlands)

Dijst, M.J.; Farag, S.; Schwanen, T.

2005-01-01

In this study, we investigated whether our understanding of adoption of e-shopping and instore shopping could be advanced through the application of attitude theory. A shortcoming of the analytical frameworks and models featured in attitude theory is that they do not address the issue of what causes

7. Applying Distributed Learning Theory in Online Business Communication Courses.

Science.gov (United States)

Walker, Kristin

2003-01-01

Focuses on the critical use of technology in online formats that entail relatively new teaching media. Argues that distributed learning theory is valuable for teachers of online business communication courses for several reasons. Discusses the application of distributed learning theory to the teaching of business communication online. (SG)

8. Learning Theories Applied to the Teaching of Business Communication.

Science.gov (United States)

Hart, Maxine Barton

1980-01-01

Reviews major learning theories that can be followed by business communication instructors, including those by David Ausubel, Albert Bandura, Kurt Lewin, Edward Thorndike, B.F. Skinner, and Robert Gagne. (LRA)

9. Applying learning theories and instructional design models for effective instruction.

Science.gov (United States)

Khalil, Mohammed K; Elkhider, Ihsan A

2016-06-01

Faculty members in higher education are involved in many instructional design activities without formal training in learning theories and the science of instruction. Learning theories provide the foundation for the selection of instructional strategies and allow for reliable prediction of their effectiveness. To achieve effective learning outcomes, the science of instruction and instructional design models are used to guide the development of instructional design strategies that elicit appropriate cognitive processes. Here, the major learning theories are discussed and selected examples of instructional design models are explained. The main objective of this article is to present the science of learning and instruction as theoretical evidence for the design and delivery of instructional materials. In addition, this article provides a practical framework for implementing those theories in the classroom and laboratory. PMID:27068989

10. Metaphor in Emily Dickinson's poems applying on Cognitive linguistics Theory

Institute of Scientific and Technical Information of China (English)

谢贝妮; 祁静卫

2010-01-01

Metaphor is an important device of the poetic imagination.Poets usually use metaphor to express their thoughts.Cognitive linguistics Johnson's conceptual metaphor theory.This paper takes Emily Dickinson's several poems as examples,including:I Could Not Stop for Death,I took one Draught of life,Twas warm at first like us,and analysis the metaphor about love and death in Emily's work,with conceptual metaphor theory.

11. Decision theory applied to image quality control in radiology

OpenAIRE

Arantes Paula R; Caous Cristofer A; Lessa Patrícia S; Amaro Edson; de Souza Fernando

2008-01-01

Abstract Background The present work aims at the application of the decision theory to radiological image quality control (QC) in diagnostic routine. The main problem addressed in the framework of decision theory is to accept or reject a film lot of a radiology service. The probability of each decision of a determined set of variables was obtained from the selected films. Methods Based on a radiology service routine a decision probability function was determined for each considered group of c...

12. Attitude theory applied to in-store and online shopping

OpenAIRE

Dijst, M.J.; Farag, S.; Schwanen, T.

2005-01-01

In this study, we investigated whether our understanding of adoption of e-shopping and instore shopping could be advanced through the application of attitude theory. A shortcoming of the analytical frameworks and models featured in attitude theory is that they do not address the issue of what causes the variation in psychological constructs such as perceived behavioural control. A simplified version of the Extended Model of Goal-directed Behaviour (EMGB) (Perugini & Conner, 2000) was therefor...

13. Closing in on Chemical Bonds by Opening up Relativity Theory

Directory of Open Access Journals (Sweden)

Cynthia Kolb Whitney

2008-03-01

Full Text Available This paper develops a connection between the phenomenology of chemical bonding and the theory of relativity. Empirical correlations between electron numbers in atoms and chemical bond stabilities in molecules are first reviewed and extended. Quantitative chemical bond strengths are then related to ionization potentials in elements. Striking patterns in ionization potentials are revealed when the data are viewed in an element-independent way, where element-specific details are removed via an appropriate scaling law. The scale factor involved is not explained by quantum mechanics; it is revealed only when one goes back further, to the development of EinsteinÃ¢Â€Â™s special relativity theory.

14. Applying the learning theories to medical education: A commentary

Directory of Open Access Journals (Sweden)

Sivalingam Nalliah

2014-01-01

Full Text Available Medical education of today continues to evolve to meet the challenges of the stakeholders. Medical professionals today are expected to play multiple roles besides being experts. Thus, the curriculum has to be developed in a manner that facilitates learners to achieve the intended goal of becoming a medical professional with multiple competencies. The understanding of learning theories will be helpful in designing and delivering the curriculum to meet the demands of producing a medical professional who would meet the CanMEDS model. This commentary explores and reflects on the learning theories of behaviorism, cognitivism and constructivism as they have evolved over time and the application of these learning theories in medical education, particularly in the context of medical education in Malaysia. The authors are convinced that these three theories are not mutually exclusive but should be operationalized contextually and throughout the different stages of learning in the MBBS curriculum. Understanding these theories and their application will enhance the learning experience of students.

15. Mesoscopic Kinetic Basis of Macroscopic Chemical Thermodynamics: A Mathematical Theory

CERN Document Server

Ge, Hao

2016-01-01

From a mathematical model that describes a complex chemical kinetic system of $N$ species and $M$ elementrary reactions in a rapidly stirred vessel of size $V$ as a Markov process, we show that a macroscopic chemical thermodynamics emerges as $V\\rightarrow\\infty$. The theory is applicable to linear and nonlinear reactions, closed systems reaching chemical equilibrium, or open, driven systems approaching to nonequilibrium steady states. A generalized mesoscopic free energy gives rise to a macroscopic chemical energy function $\\varphi^{ss}(\\vx)$ where $\\vx=(x_1,\\cdots,x_N)$ are the concentrations of the $N$ chemical species. The macroscopic chemical dynamics $\\vx(t)$ satisfies two emergent laws: (1) $(\\rd/\\rd t)\\varphi^{ss}[\\vx(t)]\\le 0$, and (2)$(\\rd/\\rd t)\\varphi^{ss}[\\vx(t)]=\\text{cmf}(\\vx)-\\sigma(\\vx)$ where entropy production rate $\\sigma\\ge 0$ represents the sink for the chemical energy, and chemical motive force $\\text{cmf}\\ge 0$ is non-zero if the system is driven under a sustained nonequilibrium chemos...

16. Theory of nanoscale friction on chemically modified graphene

Science.gov (United States)

Ko, Jae-Hyeon; Kim, Yong-Hyun

2013-03-01

Recently, it is known from FFM experiments that friction force on graphene is significantly increased by chemical modification such as hydrogenation, oxidization, and fluorination, whereas adhesion properties are altered marginally. A novel nanotribological theory on two-dimensional materials is proposed on the basis of experimental results and first-principles density-functional theory (DFT) calculations. The proposed theory indicates that the total lateral stiffness that is the proportional constant of friction force is mostly associated with the out-of-plane bending stiffness of two-dimensional materials. This contrasts to the case of three-dimensional materials, in which the shear strength of materials determines nanoscale friction. We will discuss details of DFT calculations and how to generalize the current theory to three dimensional materials.

17. Marketing Theory Applied to Price Discrimination in Journals.

Science.gov (United States)

Talaga, James; Haley, Jean Walstrom

1991-01-01

Discussion of discriminatory pricing by journal publishers and its effects on libraries focuses on six prerequisites for successful discriminatory pricing that are based on marketing theory. Strategies to eliminate some of these prerequisites--and therefore eliminate discriminatory pricing--are suggested, including the need to change the attitudes…

18. Influencing Organizations to Promote Health: Applying Stakeholder Theory

Science.gov (United States)

Kok, Gerjo; Gurabardhi, Zamira; Gottlieb, Nell H.; Zijlstra, Fred R. H.

2015-01-01

Stakeholder theory may help health promoters to make changes at the organizational and policy level to promote health. A stakeholder is any individual, group, or organization that can influence an organization. The organization that is the focus for influence attempts is called the focal organization. The more salient a stakeholder is and the more…

19. Intelligent mathematics II applied mathematics and approximation theory

CERN Document Server

Duman, Oktay

2016-01-01

This special volume is a collection of outstanding more applied articles presented in AMAT 2015 held in Ankara, May 28-31, 2015, at TOBB Economics and Technology University. The collection is suitable for Applied and Computational Mathematics and Engineering practitioners, also for related graduate students and researchers. Furthermore it will be a useful resource for all science and engineering libraries. This book includes 29 self-contained and well-edited chapters that can be among others useful for seminars in applied and computational mathematics, as well as in engineering.

20. Applying Humanistic Learning Theory: The "Art" of Coaching

Science.gov (United States)

Connolly, Graeme J.

2016-01-01

The purpose of this article is to apply specific principles of psychology to the coaching process. More specifically, it is about becoming a productive and effective coach, who positively affects the athletic careers and lives of young people.

1. The Theory of Neural Cognition Applied to Robotics

OpenAIRE

Claude F. Touzet

2015-01-01

The Theory of neural Cognition (TnC) states that the brain does not process information, it only represents information (i.e., it is 'only' a memory). The TnC explains how a memory can become an actor pursuing various goals, and proposes explanations concerning the implementation of a large variety of cognitive abilities, such as attention, memory, language, planning, intelligence, emotions, motivation, pleasure, consciousness and personality. The explanatory power of this new framework exten...

2. Applying the learning theories to medical education: A commentary

OpenAIRE

Sivalingam Nalliah; Nazimah Idris

2014-01-01

Medical education of today continues to evolve to meet the challenges of the stakeholders. Medical professionals today are expected to play multiple roles besides being experts. Thus, the curriculum has to be developed in a manner that facilitates learners to achieve the intended goal of becoming a medical professional with multiple competencies. The understanding of learning theories will be helpful in designing and delivering the curriculum to meet the demands of ...

3. The Potential of Facet Theory for Applied Social Psychology

OpenAIRE

Canter, David V.

1996-01-01

In order to illustrate a relatively new approach to research methods and data analysis, most commonly referred to as facet theory (Gratch, 1973), the present paper describes three examples of the approach in use. The range of data types and variety of modes of analysis which can be accommodated by this approach are exemplified, starting with a simple example dealing with energy conservation in universities, then moving on to examine differences between prisoners and staff in ...

4. Artificial Intelligence and Systems Theory: Applied to Cooperative Robots

OpenAIRE

Lima, Pedro U.; Custodio, Luis M. M.

2004-01-01

This paper describes an approach to the design of a population of cooperative robots based on concepts borrowed from Systems Theory and Artificial Intelligence. The research has been developed under the SocRob project, carried out by the Intelligent Systems Laboratory at the Institute for Systems and Robotics - Instituto Superior T?cnico (ISR/IST) in Lisbon. The acronym of the project stands both for "Society of Robots" and "Soccer Robots", the case study where we are test...

5. Active Polyhedron: Surface Evolution Theory Applied to Deformable Meshes

OpenAIRE

Slabaugh, G. G.; Unal, G.B.

2005-01-01

This paper presents a novel 3D deformable surface that we call an active polyhedron. Rooted in surface evolution theory, an active polyhedron is a polyhedral surface whose vertices deform to minimize a regional and/or boundarybased energy functional. Unlike continuous active surface models, the vertex motion of an active polyhedron is computed by integrating speed terms over polygonal faces of the surface. The resulting ordinary differential equations (ODEs) provide improved robustness to noi...

6. Control theory and splines, applied to signature storage

Science.gov (United States)

Enqvist, Per

1994-01-01

In this report the problem we are going to study is the interpolation of a set of points in the plane with the use of control theory. We will discover how different systems generate different kinds of splines, cubic and exponential, and investigate the effect that the different systems have on the tracking problems. Actually we will see that the important parameters will be the two eigenvalues of the control matrix.

7. 3rd International Conference on Applied Mathematics and Approximation Theory

CERN Document Server

Duman, Oktay

2016-01-01

This special volume is a collection of outstanding theoretical articles presented at the conference AMAT 2015, held in Ankara, Turkey from May 28-31, 2015, at TOBB University of Economics and Technology. The collection is suitable for a range of applications: from researchers and practitioners of applied and computational mathematics, to students in graduate-level seminars. Furthermore it will be a useful resource for all science libraries. This book includes 27 self-contained and expertly-refereed chapters that provide numerous insights into the latest developments at the intersection of applied and computational mathematics, engineering, and statistics.

8. Applying Organizational Commitment and Human Capital Theories to Emigration Research

Science.gov (United States)

2012-01-01

Purpose: This study aims to bring some additional insight into the issue of emigration by establishing a relationship between emigration and psychic return of citizens to their human capital investment in the country. Design/methodology/approach: The article adopts a quantitative research strategy. It applies organizational commitment and human…

9. Behavioral Theory in the Context of Applied Cancer Screening Research

Science.gov (United States)

Zapka, Jane; Cranos, Caroline

2009-01-01

The U.S. health care system is challenged to provide effective, equitable, and efficient care for its citizens. The past decades have witnessed profound concern about the quality of care Americans receive, the equality of care across racial ethnic communities, and the escalating costs of private and public coverage. These concerns apply to the…

10. Stakeholder Theory As an Ethical Approach to Effective Management: applying the theory to multiple contexts

OpenAIRE

JEFFREY S. HARRISON; R. Edward Freeman; Mônica Cavalcanti Sá de Abreu

2015-01-01

Objective – This article provides a brief overview of stakeholder theory, clears up some widely held misconceptions, explains the importance of examining stakeholder theory from a variety of international perspectives and how this type of research will advance management theory, and introduces the other articles in the special issue. Design/methodology/approach – Some of the foundational ideas of stakeholder theory are discussed, leading to arguments about the importance of the theory ...

11. Deformation theory applied to quantization and group representations

International Nuclear Information System (INIS)

We are concerned with deformations of the algebraic composition laws (pointwise product, i.e. associative algebra, or Poisson bracket, i.e. Lie algebra) of the observables of classical physics (functions or distributions on phase space). We show how such deformations (with parameter h/2π) permit an autonomous development of quantum theories on the same observables, a kind of algebraic geometric quantization without need for Hilbert space operators (nor for polarizations or half-forms): quantization is a deformation of the composition law of the classical observables, not a drastic change in their nature. Moreover, under some conditions, the formalism so obtained is unique and stable. (orig./HSI)

12. Chemical characterization of agricultural supplies applied to organic tomato cultivation

International Nuclear Information System (INIS)

The agricultural supplies used in the organic system to control pests and diseases as well as to fertilize soil are claimed to be beneficial to plants and innocuous to human health and to the environment. The chemical composition of six agricultural supplies commonly used in the organic tomato culture, was evaluated by instrumental neutron activation analysis (INAA). Results were compared to the maximum limits established by the Environment Control Agency of the S?o Paulo State (CETESB) and the Guidelines for Organic Quality Standard of Instituto Biodinamico (IBD). Concentrations above reference values were found for Co, Cr and Zn in compost, Cr and Zn in cattle manure and Zn in rice bran. (author)

13. Enhanced Thomson scattering theory applied to eight experiments

International Nuclear Information System (INIS)

The onset of an instability, such as the 2ω/sub p/ at the n/sub c//4 surface, usually leads to wave breaking and the emission of hot electron pulses which can profoundly influence instability thresholds and scattering behavior elsewhere in the plasma. In particular, enhanced Thomson scattering (via the plasma line) can occur, and this has been used to explain the observation of the SRS instability well below the theoretical threshold. A simple model of the hot electron pulses based on measured values of the hot and cold electron temperatures, T/sub h/ and T/sub c/, has yielded good agreement with experimental observation of the Raman spectral frequency bands. The agreement has continued, even for experiments which are clearly above the SRS threshold, with the enhanced noise likely acting as a ''seed'' for the SRS growth. We will show details of the successful comparison of this theory with six experiments carried out on SHIVA, ARGUS, NOVETTE(2), and GDL(2), and also with an upscattering feature seen at Garching. In addition, a recent experiment using 6 beams of OMEGA (at 0.35μ) will be discussed, and compared with the theory. The report is comprised of viewgraphs of the talks

14. Behavioral Theory in the Context of Applied Cancer Screening Research

OpenAIRE

Zapka, Jane; Cranos, Caroline

2009-01-01

The U.S. health care system is indeed challenged to provide effective, equitable, and efficient care for its citizens (Aday, Begley, Lairson, & Balkrishnan, 2004). The past decades have witnessed profound concern about the quality of care Americans receive, the equality of care across racial ethnic communities, and the escalating costs of private and public coverage. These concerns apply to the cancer care continuum, including screening. This commentary reflects on the methods, findings, and ...

15. Geometrodynamical Fluid Theory Applied to Dynamo Flows in Planetary Interiors

Science.gov (United States)

Lewis, Kayla; Miramontes, Diego; Scofield, Dillon

2015-11-01

Due to their reliance on a Newtonian viscous stress model, the traditional Navier-Stokes equations are of parabolic type; this in turn leads to acausal behavior of solutions to these equations, e.g., a localized disturbance at any point instantaneously affects the solution arbitrarily far away. Geometrodynamical fluid theory (GFT) avoids this problem through a relativistically covariant formulation of the flow equations. Using GFT, we derive the magnetohydrodynamic equations describing the balance of energy-momentum appropriate for dynamo flows in planetary interiors. These equations include interactions between magnetic and fluid vortex fields. We derive scaling laws from these equations and compare them with scaling laws derived from the traditional approach. Finally, we discuss implications of these scalings for flows in planetary dynamos.

16. Chemical analysis applied to the radiation sterilization of solid ketoprofen

Science.gov (United States)

Colak, S.; Maquille, A.; Tilquin, B.

2006-01-01

The aim of this work is to investigate the feasibility of radiation sterilization of ketoprofen from a chemical point of view. Although irradiated ketoprofen has already been studied in the literature [Katusin-Razem et al., Radiat. Phys. Chem. 73 111-116 (2005)], new results, on the basis of electron spin resonance (ESR) measurements and the use of hyphenated techniques (GC-MS and LC-MS), are obtained. The ESR spectra of irradiated ketoprofen consists of four unresolved resonance peaks and the mean G-value of ketoprofen is found to be 4 +/- 0.9 nmoles/J, which is very small. HPLC-UV analyses indicate that no significant loss of ketoprofen is detected after irradiation. LC-MS-MS analyses show that the structures of the non-volatile final products are similar to ketoprofen. Benzaldehyde is detected in the irradiated samples after dynamic-extraction GC-MS. The analyses show that ketoprofen is radioresistant and therefore might be radiosterilized.

17. Chemical Graph Theory and the Sherlock Holmes Principle

Directory of Open Access Journals (Sweden)

Alexandru T. Balaban

2013-07-01

Full Text Available The development of chemical applications of graph theory is reviewed from a personal perspective. Graph-theoretical methods for finding all graphs fulfilling certain mathematical conditions followed by eliminating chemically impossible solutions are equivalent to the ‘Sherlock Holmes principle’. For molecular graphs, this is illustrated by monocyclic aromatic systems and by valence isomers of annulenes. Using dualist graphs for benzenoids and diamond hydrocarbons it was possible to develop simple encoding systems that allowed convenient enumerations of isomers. Starting with the invention of reaction graphs in 1966 that included the Petersen graph which is also the 5-cage (the smallest graph with girth 5 two gaps were filled by discovering the first 10-cage and the unique 11-cage, showing how chemical clues can lead to interesting mathematical developments. Graphs of a third type are represented by synthon graphs that are helping chemical synthesis. Connections between chemical structure and molecular properties allow the design of biologically active substances on the basis of quantitative structure-activity relationships (QSARs. Some of the simplest tools for QSAR are topological indices and they are briefly discussed.

18. One-Group Perturbation Theory Applied to Measurements with Void

International Nuclear Information System (INIS)

Formulas suitable for evaluating progressive as well as single rod substitution measurements are derived by means of one-group perturbation theory. The diffusion coefficient may depend on direction and position. By using the buckling concept one can derive expressions which are quite simple and the perturbed flux can be taken into account in a comparatively simple way. By using an unconventional definition of cells a transition region is introduced quite logically. Experiments with voids around metal rods, diam. 3.05 cm, have been analysed. The agreement between extrapolated and directly measured buckling values is excellent, the buckling difference between lattices with water-filled and voided shrouds being 0. 263 ± 0.015/m2 and 0.267 ± 0.005/m2 resp. From single-rod experiments differences between diffusion coefficients are determined to δDr/D = 0.083 ± 0.004 and δDz/D = 0.120 ± 0.018. With air-filled shrouds there is consequently anisotropy in the neutron diffusion and we have (Dz/Dr)air = 1.034 ± 0.020

19. Artificial Intelligence and Systems Theory: Applied to Cooperative Robots

Directory of Open Access Journals (Sweden)

Pedro U. Lima

2008-11-01

Full Text Available This paper describes an approach to the design of a population of cooperative robots based on concepts borrowed from Systems Theory and Artificial Intelligence. The research has been developed under the SocRob project, carried out by the Intelligent Systems Laboratory at the Institute for Systems and Robotics - Instituto Superior T?cnico (ISR/IST in Lisbon. The acronym of the project stands both for "Society of Robots" and "Soccer Robots", the case study where we are testing our population of robots. Designing soccer robots is a very challenging problem, where the robots must act not only to shoot a ball towards the goal, but also to detect and avoid static (walls, stopped robots and dynamic (moving robots obstacles. Furthermore, they must cooperate to defeat an opposing team. Our past and current research in soccer robotics includes cooperative sensor fusion for world modeling, object recognition and tracking, robot navigation, multi-robot distributed task planning and coordination, including cooperative reinforcement learning in cooperative and adversarial environments, and behavior-based architectures for real time task execution of cooperating robot teams.

20. Evaluation of Slow Release Fertilizer Applying Chemical and Spectroscopic methods

International Nuclear Information System (INIS)

Controlled-release fertilizer offers a number of advantages in relation to crop production in newly reclaimed soils. Butadiene styrene latex emulsion is one of the promising polymer for different purposes. In this work, laboratory evaluation of butadiene styrene latex emulsion 24/76 polymer loaded with a mixed fertilizer was carried out. Macro nutrients (N, P and K) and micro-nutrients(Zn, Fe, and Cu) were extracted by basic extract from the polymer fertilizer mixtures. Micro-sampling technique was investigated and applied to measure Zn, Fe, and Cu using flame atomic absorption spectrometry in order to overcome the nebulization difficulties due to high salt content samples. The cumulative releases of macro and micro-nutrients have been assessed. From the obtained results, it is clear that the release depends on both nutrients and polymer concentration in the mixture. Macro-nutrients are released more efficient than micro-nutrients of total added. Therefore it can be used for minimizing micro-nutrients hazard in soils

1. Theory for Diffusion-Limited Oscillating Chemical Reactions

OpenAIRE

Bussemaker, H. J.; Brito López, Ricardo

1996-01-01

A kinetic description of lattice-gas automaton models for reaction-diffusion systems is presented. It provides corrections to the mean-field rate equations in the diffusion-limited regime. When applied to the two-species Maginu model, the theory gives an excellent quantitative prediction of the effect of slow diffusion on the periodic oscillations of the average concentrations in a spatially homogeneous state.

2. Robust Bayesian decision theory applied to optimal dosage.

Science.gov (United States)

Abraham, Christophe; Daurès, Jean-Pierre

2004-04-15

We give a model for constructing an utility function u(theta,d) in a dose prescription problem. theta and d denote respectively the patient state of health and the dose. The construction of u is based on the conditional probabilities of several variables. These probabilities are described by logistic models. Obviously, u is only an approximation of the true utility function and that is why we investigate the sensitivity of the final decision with respect to the utility function. We construct a class of utility functions from u and approximate the set of all Bayes actions associated to that class. Then, we measure the sensitivity as the greatest difference between the expected utilities of two Bayes actions. Finally, we apply these results to weighing up a chemotherapy treatment of lung cancer. This application emphasizes the importance of measuring robustness through the utility of decisions rather than the decisions themselves. PMID:15057878

3. Applying Theory-Driven Approaches to Understanding and Modifying Clinicians' Behavior: What Do We Know?

OpenAIRE

Perkins, Matthew B.; Peter S Jensen; JACCARD, James; Gollwitzer, Peter M.; Oettingen, Gabriele; Pappadopulos, Elizabeth; Hoagwood, Kimberly E.

2007-01-01

OBJECTIVE: Despite major recent research advances, large gaps exist between accepted mental health knowledge and clinicians' real-world practices. Although hundreds of studies have successfully utilized basic behavioral science theories to understand, predict, and change patients' health behaviors, the extent to which these theories most notably the theory of reasoned action (TRA) and its extension, the theory of planned behavior (TPB) have been applied to understand and change clinician beha...

4. Chemical reaction network approaches to Biochemical Systems Theory.

Science.gov (United States)

Arceo, Carlene Perpetua P; Jose, Editha C; Marin-Sanguino, Alberto; Mendoza, Eduardo R

2015-11-01

This paper provides a framework to represent a Biochemical Systems Theory (BST) model (in either GMA or S-system form) as a chemical reaction network with power law kinetics. Using this representation, some basic properties and the application of recent results of Chemical Reaction Network Theory regarding steady states of such systems are shown. In particular, Injectivity Theory, including network concordance [36] and the Jacobian Determinant Criterion [43], a "Lifting Theorem" for steady states [26] and the comprehensive results of Müller and Regensburger [31] on complex balanced equilibria are discussed. A partial extension of a recent Emulation Theorem of Cardelli for mass action systems [3] is derived for a subclass of power law kinetic systems. However, it is also shown that the GMA and S-system models of human purine metabolism [10] do not display the reactant-determined kinetics assumed by Müller and Regensburger and hence only a subset of BST models can be handled with their approach. Moreover, since the reaction networks underlying many BST models are not weakly reversible, results for non-complex balanced equilibria are also needed. PMID:26363083

5. Testing Turing's Theory of Morphogenesis in Chemical Cells

Science.gov (United States)

Tompkins, Nathan; Li, Ning; Girabawe, Camille; Heymann, Michael; Ermentrout, G. Bard; Epstein, Irving; Fraden, Seth

2015-03-01

Alan Turing's 1952 paper The Chemical Basis of Morphogenesis'' described how reaction-diffusion dynamics could create six spatiotemporal patterns including a stationary pattern that could lead to physical morphogenesis (which now bears his name). This stationary Turing pattern'' has been observed in continuous media of various chemical systems but never in diffusively coupled discrete reactors as Turing theorized. We have created a system of microfluidically produced chemical compartments containing the Belousov-Zhabotinsky reaction that are designed to fulfill the assumptions of Turing's theoretical system. This system demonstrates all six spatiotemporal patterns that Turing predicted. In particular, we observe the stationary case that bears Turing's name where the cells create a pattern of oxidized and reduced states. As Turing predicted, this chemical heterogeneity gives rise to physical heterogeneity by driving an osmotic flow, swelling the reduced cells and shrinking the oxidized cells. In addition to the six patterns and physical morphogenesis predicted by Turing we observe a seventh pattern of mixed stationary/oscillatory states that is not predicted by Turing. This seventh pattern requires modifying Turing's theory to include slight heterogeneity to match experiments.

6. Activity Theory applied to Global Software Engineering: Theoretical Foundations and Implications for Tool Builders

DEFF Research Database (Denmark)

2012-01-01

Although a plethora of tools are available for Global Software Engineering (GSE) teams, it is being realized increasingly that the most prevalent desktop metaphor underpinning the majority of tools have several inherent limitations. We have proposed that Activity-Based Computing (ABC) can be a...... applying activity theory to GSE. We analyze and explain the fundamental concepts of activity theory, and how they can be applied by using examples of software architecture design and evaluation processes. We describe the kind of data model and architectural support required for applying activity theory in...

7. Learning Theories Applied to Teaching Technology: Constructivism versus Behavioral Theory for Instructing Multimedia Software Programs

Science.gov (United States)

Reed, Cajah S.

2012-01-01

This study sought to find evidence for a beneficial learning theory to teach computer software programs. Additionally, software was analyzed for each learning theory's applicability to resolve whether certain software requires a specific method of education. The results are meant to give educators more effective teaching tools, so students…

8. Perspectives on the dental school learning environment: theory X, theory Y, and situational leadership applied to dental education.

Science.gov (United States)

Connor, Joseph P; Troendle, Karen

2007-08-01

This article applies two well-known management and leadership models-Theory X and Theory Y, and Situational Leadership-to dental education. Theory X and Theory Y explain how assumptions may shape the behaviors of dental educators and lead to the development of "cop" and "coach" teaching styles. The Situational Leadership Model helps the educator to identify the teaching behaviors that are appropriate in a given situation to assist students as they move from beginner to advanced status. Together, these models provide a conceptual reference to assist in the understanding of the behaviors of both students and faculty and remind us to apply discretion in the education of our students. The implications of these models for assessing and enhancing the educational environment in dental school are discussed. PMID:17687079

9. Development of Gerontological Nursing Theory. Applying the Man-Living-Health Theory of Nursing.

Science.gov (United States)

Heine, Christine

1991-01-01

Describes Rosemary Rizzo Parse's Man-Living-Health theory that was used to describe how gerontological nursing knowledge could be developed through a nursing conceptual model that includes a defined practice and research methodology. (Author/JOW)

10. Usage оf Capital Amount in Economical Situations While Applying Game Theory

OpenAIRE

K. A. Pazokitoroud

2014-01-01

Game theory is a branch of applied mathematics and its methods are used in social sciences, especially in economics, engineering, political science, computer technology and philosophy. Winning in a game follows not only theory of probability but it has its own special laws and principles, and while using them in the game every player tries to get closer to victory. In the current classification of the game theory there is no group that considers the number or value of the capital involved in ...

11. Applied Systemic Theory and Educational Psychology: Can the Twain Ever Meet?

Science.gov (United States)

Pellegrini, Dario W.

2009-01-01

This article reflects on the potential benefits of applying systemic theory to the work of educational psychologists (EPs). It reviews developments in systemic thinking over time, and discusses the differences between more directive "first order" versus collaborative "second order" approaches. It considers systemic theories and illustrates their…

12. How Settings Change People: Applying Behavior Setting Theory to Consumer-Run Organizations

Science.gov (United States)

Brown, Louis D.; Shepherd, Matthew D.; Wituk, Scott A.; Meissen, Greg

2007-01-01

Self-help initiatives stand as a classic context for organizational studies in community psychology. Behavior setting theory stands as a classic conception of organizations and the environment. This study explores both, applying behavior setting theory to consumer-run organizations (CROs). Analysis of multiple data sets from all CROs in Kansas…

13. An Analysis of Oppositional Culture Theory Applied to One Suburban Midwestern High School

Science.gov (United States)

Blackard, Tricia; Puchner, Laurel; Reeves, Alison

2014-01-01

This study explored whether and to what extent Ogbu and Fordham's Oppositional Culture Theory applied to African American high school students at one Midwestern suburban high school. Based on multiple interviews with six African American students, the study found support for some aspects of the theory but not for others.

14. Masculinity Theory in Applied Research with Men and Boys with Intellectual Disability

Science.gov (United States)

Wilson, Nathan John; Shuttleworth, Russell; Stancliffe, Roger; Parmenter, Trevor

2012-01-01

Researchers in intellectual disability have had limited theoretical engagement with mainstream theories of masculinity. In this article, the authors consider what mainstream theories of masculinity may offer to applied research on, and hence to therapeutic interventions with, men and boys with intellectual disability. An example from one research…

15. Verification and Invalidation of the Theory of Symplectic Manifold with Contact Degeneracies as Applied to the Classical Field Theory

CERN Document Server

Sokolov, Igor V

2015-01-01

A theory of Symplectic Manifold with Contact Degeneracies (SMCD) was developed in [Zot'ev,2007]. The symplectic geometry uses an anti-symmetric tensor (closed differential form) such as a field tensor used in the classical field theory. The SMCD theory studies degeneracies of such form. In [Zot'ev,2011] the SMCD theory was applied to study a front of an electromagnetic pulsed field propagating into a region with no field. Here, the result of [Zot'ev,2011] is compared with the problem solution obtained using the well-known method presented in Witham, G.B., Linear and nonlinear waves, 1974. It is shown that the SMCD theory prediction is not supported by the result obtained with the Witham method.

16. NATO Advanced Research Workshop on The Theory of Chemical Reaction Dynamics

CERN Document Server

1986-01-01

The calculation of cross sections and rate constants for chemical reactions in the gas phase has long been a major problem in theoretical chemistry. The need for reliable and applicable theories in this field is evident when one considers the significant recent advances that have been made in developing experimental techniques, such as lasers and molecular beams, to probe the microscopic details of chemical reactions. For example, it is now becoming possible to measure cross sections for chemical reactions state selected in the vibrational­ rotational states of both reactants and products. Furthermore, in areas such as atmospheric, combustion and interstellar chemistry, there is an urgent need for reliable reaction rate constant data over a range of temperatures, and this information is often difficult to obtain in experiments. The classical trajectory method can be applied routinely to simple reactions, but this approach neglects important quantum mechanical effects such as tunnelling and resonances. For al...

17. Summaries of FY 1986 research in the Applied Plasma Physics Fusion Theory Program

International Nuclear Information System (INIS)

The Theory Program is charged with supporting the development of theories and models of plasmas for the fusion research effort. This work ranges from first-principles analysis of elementary plasma processes to empirical simulation of specific experiments. The Theory Program supports research by industrial contractors, US government laboratories, and universities. The university support also helps to fulfill the DOE mission of training scientists for the fusion program. The Theory Program is funded through the Fusion Theory Branch, Division of Applied Plasma Physics in the Office of Fusion Energy. The work is divided among 31 institutions, of which 19 are universities, five are industrial contractors, and seven are US government laboratories; see Table 1 for a complete list. The FY 1986 Theory Program budget was divided among theory types: toroidal, mirror, alternate concept, generic, and atomic. Device modeling is included among the other funding categories, and is not budgeted separately

18. Chemical Applications of Graph Theory: Part II. Isomer Enumeration.

Science.gov (United States)

Hansen, Peter J.; Jurs, Peter C.

1988-01-01

Discusses the use of graph theory to aid in the depiction of organic molecular structures. Gives a historical perspective of graph theory and explains graph theory terminology with organic examples. Lists applications of graph theory to current research projects. (ML)

19. Density versus chemical potential in holographic field theories

CERN Document Server

Nogueira, Fernando

2011-01-01

We study the relationship between charge density ({\\rho}) and chemical potential ({\\mu}) for an array of Lorentz invariant 3 + 1 dimensional holographic field theories with the minimal structure of a conserved charge. The systems considered include Dp-Dq probe brane constructions and probe and backreacted 'bottom-up' models with gauge and scalar fields. In all cases, at large density, the relationship is well modelled by a power law behaviour of the form {\\rho} $\\propto$ {\\mu}^{\\alpha}. A variety of powers {\\alpha} are found in the brane systems while in most of the bottom-up models {\\alpha} is determined by the underlying conformal symmetry. Further, it is demonstrated that basic thermodynamical and causality constraints demand {\\alpha} \\geq 1, a condition that was realized in each system considered.

20. On the Nature of Applied Linguistics: Theory and Practice Relationships from a Critical Perspective

Science.gov (United States)

Sánchez, William

2007-01-01

This article explores the relationships between Applied Linguistics and other related disciplines concerning language use and language teaching issues. It seeks to trace the changes in the view of the relationship between theory and practice in Applied Linguistics, to explain the reason for those changes, and to discuss the implications for…

1. Potential Performance Theory (PPT): A General Theory of Task Performance Applied to Morality

Science.gov (United States)

Trafimow, David; Rice, Stephen

2008-01-01

People can use a variety of different strategies to perform tasks and these strategies all have two characteristics in common. First, they can be evaluated in comparison with either an absolute or a relative standard. Second, they can be used at varying levels of consistency. In the present article, the authors develop a general theory of task…

2. Applying critical chain buffer management theory in location-based management

DEFF Research Database (Denmark)

Büchmann-Slorup, Rolf

2014-01-01

Guidelines for prioritizing buffers on location-based management (LBM) projects are established through the use of critical chain theory (CCT). Buffer management theory in LBM has gained little attention from the research community. CCT builds on the assumption that each task is, either consciously...... prioritization in LBM that are based on critical chain buffer management theory....... the criticisms by CCT also apply to LBM projects, CCT is based on the critical path method, and the guidelines from CCT must be adapted to the criticality principle of LBM theory. Accordingly, the contribution to the body of knowledge of this article is guidelines of buffer placement and...

3. 1998 Chemical Technology Division Annual Technical Report. Applying chemical innovation to environmental problems

International Nuclear Information System (INIS)

The Chemical Technology (CMT) Division is a diverse technical organization with principal emphases in environmental management and development of advanced energy sources. The Division conducts research and development in three general areas: (1) development of advanced power sources for stationary and transportation applications and for consumer electronics, (2) management of high-level and low-level nuclear wastes and hazardous wastes, and (3) electrometallurgical treatment of spent nuclear fuel. The Division also performs basic research in catalytic chemistry involving molecular energy resources, mechanisms of ion transport in lithium battery electrolytes, and the chemistry of technology-relevant materials. In addition, the Division operates the Analytical Chemistry Laboratory, which conducts research in analytical chemistry and provides analytical services for programs at Argonne National Laboratory (ANL) and other organizations. Technical highlights of the Division's activities during 1998 are presented

4. Theory-Based Stakeholder Evaluation – applied. Competing Stakeholder Theories in the Quality Management of Primary Education

DEFF Research Database (Denmark)

Hansen, Morten Balle; Heilesen, J. B.

In the broader context of evaluation design, this paper examines and compares pros and cons of a theory-based approach to evaluation (TBE) with the Theory-Based Stakeholder evaluation (TSE) model, introduced by Morten Balle Hansen and Evert Vedung (Hansen and Vedung 2010). While most approaches to...... reports, a municipal framework to monitor and evaluate the quality in compulsory education in Denmark (EVA 2011). The paper reanalyzes the qualitative and quantitative data of the evaluation study by applying the TSE-model. The purpose is to test and elaborate on the practical use of the TSE-model, as an...

5. Quasi-chemical Theory for the Statistical Thermodynamics of the Hard Sphere Fluid

OpenAIRE

Pratt, Lawrence R.; LaViolette, Randall A.; Gomez, Maria A.; Gentile, Mary E.

2001-01-01

We develop a quasi-chemical theory for the study of packing thermodynamics in dense liquids. The situation of hard-core interactions is addressed by considering the binding of solvent molecules to a precisely defined cavity' in order to assess the probability that the cavity' is entirely evacuated. The primitive quasi-chemical approximation corresponds to a extension of the Poisson distribution used as a default model in an information theory approach. This primitive quasi-chemical theory i...

6. On the Basis and Predicament of Applying Organizational Support Theory to Chinese Public Human Resource Management

OpenAIRE

Huali Wu

2009-01-01

Organizational Support Theory emphasizes on the concerns and attentions of organizations to employees. It can arouse employees’ a sense of obligation to help organizations to reach objectives, enhancing employees’ emotional commitments to organizations, and make employees dedicate to organizations willingly. At present, this theory has already been studied and applied to Chinese enterprises’ human resource development and management field. But seldom does it be referenced by the public manage...

7. Applying Orem's theory to the long-term care of adolescent transplant recipients.

Science.gov (United States)

Norris, M K

1991-02-01

The nursing theory of Dorothea Orem is applied to the care of the adolescent transplant recipient in the long-term setting of outpatient services. The theory of self-care is used as a framework to organize and direct nursing services to this select population. The following article discusses the framework that significantly contributes to maximizing the potential and quality of life for each recipient and assures the quality and utility of professional nursing services. PMID:2003754

8. Analysis of marine ecological compensation for environmental risk caused by chemical spill based on game theory

Institute of Scientific and Technical Information of China (English)

Zhang Jiwei; Yang Zhifeng; Huang Xinyu

2009-01-01

The problem of marine environmental risk is ultimately the result of game theory between the marine environmental managers and the enterprise of potential environmental risk.This paper analyzes the internal economic relationship that whether the "protection" policy is applied between the protection action of marine environmental managers and the chemical enterprise, The result shows that the key factor whether the enterprise adopt the "protection" policy or not is the amount of penalty and the government's cost of execution, and the compulsive ecological compensation is obligatory from the angle of stimulating the enterprise of canontcal action and adopting the "protection" policy.To build the ecological compensation mechanism based on the environmental risk will effectively improve the level of management in sea area and decrease the probability of chemical spill.

9. A Theory of Decomposition of Complex Chemical Networks using the Hill Functions

CERN Document Server

Chikayama, Eisuke

2014-01-01

The design and synthesis of complex and large mimicked biochemical networks de novo is an unsolved problem in synthetic biology. To address this limitation without resorting to ad hoc computations and experiments, a predictive mathematical theory is required to reduce these complex chemical networks into natural physico-chemical expressions. Here we provide a mathematical theory that offers a physico-chemical expression for a large chemical network that is almost arbitrarily both nonlinear and complex. Unexpectedly, the theory demonstrates that such networks can be decomposed into reactions based solely on the Hill equation, a simple chemical logic gate. This theory, analogous to implemented electrical logic gates or functional algorithms in a computer, is proposed for implementing regulated sequences of functional chemical reactions, such as mimicked genes, transcriptional regulation, signal transduction, protein interaction, and metabolic networks, into an artificial designed chemical network.

10. Applying Catastrophe Theory to an Information-Processing Model of Problem Solving in Science Education

Science.gov (United States)

Stamovlasis, Dimitrios; Tsaparlis, Georgios

2012-01-01

In this study, we test an information-processing model (IPM) of problem solving in science education, namely the working memory overload model, by applying catastrophe theory. Changes in students' achievement were modeled as discontinuities within a cusp catastrophe model, where working memory capacity was implemented as asymmetry and the degree…

11. Crystal Field Theory and the Angular Overlap Model Applied to Hydrides of Main Group Elements.

Science.gov (United States)

Moore, E. A.

1990-01-01

Described is how crystal field theory and the angular overlap model can be applied to very simple molecules which can then be used to introduce such concepts as bonding orbitals, MO diagrams, and Walsh diagrams. The main-group compounds are used as examples and a switch to the transition metal complexes. (KR)

12. Applying Social Cognitive Career Theory to the Empowerment of Battered Women.

Science.gov (United States)

Chronister, Krista M.; McWhirter, Ellen Hawley

2003-01-01

Scope and consequences of domestic violence are reviewed, highlighting effects on women's career and educational well being. Social cognitive career theory (SCCT) is described and applied to experiences of women living in domestic violence situations. A framework for empowering battered women and using SCCT to promote their career development and…

13. Leading Critically: A Grounded Theory of Applied Critical Thinking in Leadership Studies

Science.gov (United States)

Jekins, Daniel M.; Cutchens, Amanda B.

2011-01-01

This study describes the development of a grounded theory of applied critical thinking in leadership studies and examines how student-centered experiential learning in leadership education bridged critical thinking with action. Over three semester undergraduate students in an upper level leadership studies course at a large four-year public…

14. Molecular cluster theory of chemical bonding in actinide oxide

International Nuclear Information System (INIS)

The electronic structure of actinide monoxides AcO and dioxides AcO2, where Ac = Th, U, Np, Pu, Am, Cm and Bk has been studied by molecular cluster methods based on the first-principles one-electron local density theory. Molecular orbitals for nearest neighbor clusters AcO10-6 and AcO12-8 representative of monoxide and dioxide lattices were obtained using non-relativistic spin-restricted and spin-polarized Hartree-Fock-Slater models for the entire series. Fully relativistic Dirac-Slater calculations were performed for ThO, UO and NpO in order to explore magnitude of spin-orbit splittings and level shifts in valence structure. Self-consistent iterations were carried out for NpO, in which the NpO6 cluster was embedded in the molecular field of the solid. Finally, a ''moment polarized'' model which combines both spin-polarization and relativistic effects in a consistent fashion was applied to the NpO system. Covalent mixing of oxygen 2p and Ac 5f orbitals was found to increase rapidly across the actinide series; metal s,p,d covalency was found to be nearly constant. Mulliken atomic population analysis of cluster eigenvectors shows that free-ion crystal field models are unreliable, except for the light actinides. X-ray photoelectron line shapes have been calculated and are found to compare rather well with experimental data on the dioxides

15. Kinetics of Hydrogen Radical Reactions with Toluene Including Chemical Activation Theory Employing System-Specific Quantum RRK Theory Calibrated by Variational Transition State Theory.

Science.gov (United States)

Bao, Junwei Lucas; Zheng, Jingjing; Truhlar, Donald G

2016-03-01

Pressure-dependent reactions are ubiquitous in combustion and atmospheric chemistry. We employ a new calibration procedure for quantum Rice-Ramsperger-Kassel (QRRK) unimolecular rate theory within a chemical activation mechanism to calculate the pressure-falloff effect of a radical association with an aromatic ring. The new theoretical framework is applied to the reaction of H with toluene, which is a prototypical reaction in the combustion chemistry of aromatic hydrocarbons present in most fuels. Both the hydrogen abstraction reactions and the hydrogen addition reactions are calculated. Our system-specific (SS) QRRK approach is adjusted with SS parameters to agree with multistructural canonical variational transition state theory with multidimensional tunneling (MS-CVT/SCT) at the high-pressure limit. The new method avoids the need for the usual empirical estimations of the QRRK parameters, and it eliminates the need for variational transition state theory calculations as a function of energy, although in this first application we do validate the falloff curves by comparing SS-QRRK results without tunneling to multistructural microcanonical variational transition state theory (MS-μVT) rate constants without tunneling. At low temperatures, the two approaches agree well with each other, but at high temperatures, SS-QRRK tends to overestimate falloff slightly. We also show that the variational effect is important in computing the energy-resolved rate constants. Multiple-structure anharmonicity, torsional-potential anharmonicity, and high-frequency-mode vibrational anharmonicity are all included in the rate computations, and torsional anharmonicity effects on the density of states are investigated. Branching fractions, which are both temperature- and pressure-dependent (and for which only limited data is available from experiment), are predicted as a function of pressure. PMID:26841076

16. A semiclassical non-adiabatic theory for elementary chemical reactions

CERN Document Server

Aubry, Serge

2014-01-01

Electron Transfer (ET) reactions are modeled by the dynamics of a quantum two-level system (representing the electronic state) coupled to a thermalized bath of classical harmonic oscillators (representing the nuclei degrees of freedom). Unlike for the standard Marcus theory, the complex amplitudes of the electronic state are chosen as reaction coordinates. Then, the dynamical equations at non vanishing temperature become those of an effective Hamiltonian submitted to damping terms and their associated Langevin random forces. The advantage of this new formalism is to extend the original theory by taking into account both ionic and covalent interactions. The standard theory is recovered only when covalent interactions are neglected. Increasing these covalent interactions from zero, the energy barrier predicted by the standard theory first depresses, next vanish (or almost vanish) and for stronger covalent interactions, covalent bond formation takes place of ET. In biochemistry, the standard Marcus theory often ...

17. Development of an Item Bank of Order and Graph by Applying Multidimensional Item Response Theory

Directory of Open Access Journals (Sweden)

Somprasong Senarat

2012-08-01

Full Text Available

This study aimed to develop an item bank of Order and Graph of Mattayomsuksa 1 level (grade 7. The samples were 4,800 lower secondary students from 34 schools in northeastern area of Thailand, academic year 2011 chosen through multi-stage random sampling. The research tool used in the study was a multiple choicetest of an Order and Graph lesson by applying multidimensional item response theory. Parameter were analyzed by confi rmatory factor analysis by applying multidimensional normalogive model with guessing of the program normalogive harmonic analysis robust method (NOHARM. Discrimination power and Easiness intercept were equated through non–orthogonal procrustes method. The study results indicated that there were 59 items out of 140 passed the test standard.

Key words: Item bank; Cognitive process; Multidimensional item response theory (MIRT

18. Quantum theory as plausible reasoning applied to data obtained by robust experiments.

Science.gov (United States)

De Raedt, H; Katsnelson, M I; Michielsen, K

2016-05-28

We review recent work that employs the framework of logical inference to establish a bridge between data gathered through experiments and their objective description in terms of human-made concepts. It is shown that logical inference applied to experiments for which the observed events are independent and for which the frequency distribution of these events is robust with respect to small changes of the conditions under which the experiments are carried out yields, without introducing any concept of quantum theory, the quantum theoretical description in terms of the Schrödinger or the Pauli equation, the Stern-Gerlach or Einstein-Podolsky-Rosen-Bohm experiments. The extraordinary descriptive power of quantum theory then follows from the fact that it is plausible reasoning, that is common sense, applied to reproducible and robust experimental data. PMID:27091169

19. Community-based preparedness programmes and the 2009 Australian bushfires: policy implications derived from applying theory.

Science.gov (United States)

MacDougall, Colin; Gibbs, Lisa; Clark, Rachel

2014-04-01

The Victorian Country Fire Authority in Australia runs the Community Fireguard (CFG) programme to assist individuals and communities in preparing for fire. The objective of this qualitative research was to understand the impact of CFG groups on their members' fire preparedness and response during the 2009 Australian bushfires. Social connectedness emerged as a strong theme, leading to an analysis of data using social capital theory. The main strength of the CFG programme was that it was driven by innovative community members; however, concerns arose regarding the extent to which the programme covered all vulnerable areas, which led the research team to explore the theory of diffusion of innovation. The article concludes by stepping back from the evaluation and using both applied theories to reflect on broad options for community fire preparedness programmes in general. The exercise produced two contrasting options for principles underlying community fire preparedness programmes. PMID:24601916

20. Effectiveness of an Applied Microbiology Course Specifically Designed for Chemical Engineering Majors

Directory of Open Access Journals (Sweden)

Gregory B. Hecht

2009-12-01

Full Text Available In recent years, the disciplines of microbiology and chemical engineering have developed an increasing convergence. To meet the needs of their future employers, today’s chemical engineering students must receive some background in microbiology. This report describes the development and content of “Biological Systems and Applications,” a novel course specifically designed to provide basic biology and applied microbiology knowledge, skills, and experience to sophomore chemical engineering majors. Data collected from entrance and exit surveys of the students demonstrated that the course is successful. The importance of the “project-base” learning technique and of interdisciplinary faculty-student and faculty-faculty collaborations are proposed as elements essential to the success of this particular course.

1. Theory of the Kinetics of Chemical Potentials in Heterogeneous Catalysis

OpenAIRE

Cheng, Jun; Hu, P

2011-01-01

Simple and powerful: The reaction kinetics at surfaces of heterogeneous catalysts is reformulated in terms of the involved chemical potentials. Based on this formulism, an approach of searching for good catalysts is proposed without recourse to extensive calculations of reaction barriers and detailed kinetic analyses. (see picture; R=reactant, I=surface intermediate, P=product, and =standard chemical potential).

2. Rate constants of chemical reactions from semiclassical transition state theory in full and one dimension

Science.gov (United States)

Greene, Samuel M.; Shan, Xiao; Clary, David C.

2016-06-01

Semiclassical Transition State Theory (SCTST), a method for calculating rate constants of chemical reactions, offers gains in computational efficiency relative to more accurate quantum scattering methods. In full-dimensional (FD) SCTST, reaction probabilities are calculated from third and fourth potential derivatives along all vibrational degrees of freedom. However, the computational cost of FD SCTST scales unfavorably with system size, which prohibits its application to larger systems. In this study, the accuracy and efficiency of 1-D SCTST, in which only third and fourth derivatives along the reaction mode are used, are investigated in comparison to those of FD SCTST. Potential derivatives are obtained from numerical ab initio Hessian matrix calculations at the MP2/cc-pVTZ level of theory, and Richardson extrapolation is applied to improve the accuracy of these derivatives. Reaction barriers are calculated at the CCSD(T)/cc-pVTZ level. Results from FD SCTST agree with results from previous theoretical and experimental studies when Richardson extrapolation is applied. Results from our implementation of 1-D SCTST, which uses only 4 single-point MP2/cc-pVTZ energy calculations in addition to those for conventional TST, agree with FD results to within a factor of 5 at 250 K. This degree of agreement and the efficiency of the 1-D method suggest its potential as a means of approximating rate constants for systems too large for existing quantum scattering methods.

3. Rate constants of chemical reactions from semiclassical transition state theory in full and one dimension.

Science.gov (United States)

Greene, Samuel M; Shan, Xiao; Clary, David C

2016-06-28

Semiclassical Transition State Theory (SCTST), a method for calculating rate constants of chemical reactions, offers gains in computational efficiency relative to more accurate quantum scattering methods. In full-dimensional (FD) SCTST, reaction probabilities are calculated from third and fourth potential derivatives along all vibrational degrees of freedom. However, the computational cost of FD SCTST scales unfavorably with system size, which prohibits its application to larger systems. In this study, the accuracy and efficiency of 1-D SCTST, in which only third and fourth derivatives along the reaction mode are used, are investigated in comparison to those of FD SCTST. Potential derivatives are obtained from numerical ab initio Hessian matrix calculations at the MP2/cc-pVTZ level of theory, and Richardson extrapolation is applied to improve the accuracy of these derivatives. Reaction barriers are calculated at the CCSD(T)/cc-pVTZ level. Results from FD SCTST agree with results from previous theoretical and experimental studies when Richardson extrapolation is applied. Results from our implementation of 1-D SCTST, which uses only 4 single-point MP2/cc-pVTZ energy calculations in addition to those for conventional TST, agree with FD results to within a factor of 5 at 250 K. This degree of agreement and the efficiency of the 1-D method suggest its potential as a means of approximating rate constants for systems too large for existing quantum scattering methods. PMID:27369506

4. The theory of metal electronucleation applied to the study of fundamental properties of liposomes

OpenAIRE

Agmo Hernández, Víctor

2013-01-01

This short review describes how the theory of electrochemical metal nucleation considering non-stationary effects due to the activation of latent nucleation sites has been successfully translated and applied to describe phenomena observed on lipid membranes. This rather unexpected connection is merely formal, but has resulted in a completely new approach in liposome research. It has been proposed that hydrophobic active sites spontaneously and constantly appear and disappear on lipid membrane...

5. Effectiveness of Anabolic Steroid Preventative Intervention among Gym Users: Applying Theory of Planned Behavior

OpenAIRE

Abbas Moghimbeigi; Babak Moeini; Hamid Allahverdipour; Farzad Jalilian

2011-01-01

Background: Use of anabolic androgenic steroids (AAS) has been associated with adversephysical and psychiatric effects and it is known as rising problem among youth people. Thisstudy was conducted to evaluate anabolic steroids preventative intervention efficiency amonggym users in Iran and theory of planned behaviour was applied as theoretical framework.Methods: Overall, 120 male gym users participated in this study as intervention and controlgroup. This was a longitudinal randomized pretest ...

6. Exact-Exchange Density Functional Theory applied to a strongly inhomogeneous electron gas

OpenAIRE

Rigamonti, S.; Reboredo, F. A.; Proetto, C. R.

2002-01-01

A recently developed quasi two-dimensional exact-exchange formalism within the framework of Density Functional Theory has been applied to a strongly inhomogeneous interacting electron gas, and the results were compared with state-of-the-art Variational Quantum Monte Carlo (VMC) numerical simulations for a three-dimensional electron gas under a strong external potential. The VMC results, extremely demanding from the computational point of view, could be considered as a benchmark for the presen...

7. MODELLING AND SIMULATING RISKS IN THE TRAINING OF THE HUMAN RESOURCES BY APPLYING THE CHAOS THEORY

OpenAIRE

Eugen ROTARESCU

2012-01-01

The article approaches the modelling and simulation of risks in the training of the human resources, as well as the forecast of the degree of human resources training impacted by risks by applying the mathematical tools offered by the Chaos Theory and mathematical statistics. We will highlight that the level of knowledge, skills and abilities of the human resources from an organization are autocorrelated in time and they depend on the level of a previous moment of the training, as well as on ...

8. Band gap engineering in polymers through chemical doping and applied mechanical strain.

Science.gov (United States)

Lanzillo, Nicholas A; Breneman, Curt M

2016-08-17

We report simulations based on density functional theory and many-body perturbation theory exploring the band gaps of common crystalline polymers including polyethylene, polypropylene and polystyrene. Our reported band gaps of 8.6 eV for single-chain polyethylene and 9.1 eV for bulk crystalline polyethylene are in excellent agreement with experiment. The effects of chemical doping along the polymer backbone and side-groups are explored, and the use mechanical strain as a means to modify the band gaps of these polymers over a range of several eV while leaving the dielectric constant unchanged is discussed. This work highlights some of the opportunities available to engineer the electronic properties of polymers with wide-reaching implications for polymeric dielectric materials used for capacitive energy storage. PMID:27324304

9. Band gap engineering in polymers through chemical doping and applied mechanical strain

Science.gov (United States)

Lanzillo, Nicholas A.; Breneman, Curt M.

2016-08-01

We report simulations based on density functional theory and many-body perturbation theory exploring the band gaps of common crystalline polymers including polyethylene, polypropylene and polystyrene. Our reported band gaps of 8.6 eV for single-chain polyethylene and 9.1 eV for bulk crystalline polyethylene are in excellent agreement with experiment. The effects of chemical doping along the polymer backbone and side-groups are explored, and the use mechanical strain as a means to modify the band gaps of these polymers over a range of several eV while leaving the dielectric constant unchanged is discussed. This work highlights some of the opportunities available to engineer the electronic properties of polymers with wide-reaching implications for polymeric dielectric materials used for capacitive energy storage.

10. Two dimensional solid state NMR methods applied to whole coals and chemically modified coals

Energy Technology Data Exchange (ETDEWEB)

Zilm, K.W.; Webb, G.G.; Millar, J.M.

1987-04-01

Two dimensional NMR methods have been shown to provide a much finer accounting of the functional types present in coals than by CPMAS spectroscopy alone. The ADIPSHIFT method has been shown to be at least as quantitative as CPMAS both in theory and experimentally. The method gives reliable distributions of carbons with differing multiplicities which is useful in identifying different functionalities that overlap in chemical shift. Recent studies of a model system indicate that the connectivity of the different groups in chemically modified coals should be obtainable from solid state COSY and NOESY experiments. This type of information will provide a very accurate picture of the structure of the alkylated sites and the substitution patterns surrounding them.

11. Stochastic chemical kinetics theory and (mostly) systems biological applications

CERN Document Server

Érdi, Péter

2014-01-01

This volume reviews the theory and simulation methods of stochastic kinetics by integrating historical and recent perspectives, presents applications, mostly in the context of systems biology and also in combustion theory. In recent years, due to the development in experimental techniques, such as optical imaging, single cell analysis, and fluorescence spectroscopy, biochemical kinetic data inside single living cells have increasingly been available. The emergence of systems biology brought renaissance in the application of stochastic kinetic methods.

12. Significance of vapor phase chemical reactions on CVD rates predicted by chemically frozen and local thermochemical equilibrium boundary layer theories

Science.gov (United States)

Gokoglu, Suleyman A.

1988-01-01

This paper investigates the role played by vapor-phase chemical reactions on CVD rates by comparing the results of two extreme theories developed to predict CVD mass transport rates in the absence of interfacial kinetic barrier: one based on chemically frozen boundary layer and the other based on local thermochemical equilibrium. Both theories consider laminar convective-diffusion boundary layers at high Reynolds numbers and include thermal (Soret) diffusion and variable property effects. As an example, Na2SO4 deposition was studied. It was found that gas phase reactions have no important role on Na2SO4 deposition rates and on the predictions of the theories. The implications of the predictions of the two theories to other CVD systems are discussed.

13. A Thermal Field Theory with Non-uniform Chemical Potential

CERN Document Server

Arai, Masato; Sasaki, Shin

2013-01-01

We investigate thermal one-loop effective potentials in multi-flavor models with chemical potentials. We study four-dimensional models in which each flavor have different global U(1) charges. Accordingly they have different chemical potentials. We call these "non-uniform chemical potentials," which are organized into a diagonal matrix \\mu. The mass matrix at a vacuum does not commute with \\mu. We find that the effective potential is divided into three parts. The first part is the Coleman-Weinberg potential. The UV divergence resides only in this part. The second is the correction to the Coleman-Weinberg potential that is independent of temperature, and the third depends on both temperature and \\mu. Our result is a generalization of the thermal potentials in previous studies for models with single and multi-flavors with (uniform) chemical potentials and reproduces all the known results correctly.

14. L'identità percepita: applicare la Grounded Theory in biblioteca Perceived Identity: applying Grounded Theory in Libraries

Directory of Open Access Journals (Sweden)

Chiara Faggiolani

2011-06-01

Full Text Available L'applicazione della Grounded Theory alle indagini finalizzate ad approfondire l'identità della biblioteca percepita dagli utenti è illustrata attraverso uno studio su quattro biblioteche del sistema bibliotecario comunale di Perugia. Inaugurata alla fine degli anni Sessanta, è una metodologia di ricerca sociale e un insieme di procedure capaci di generare sistematicamente una teoria fondata sui dati. È uno dei metodi interpretativi che mirano a descrivere i significati attribuiti ai fenomeni in esame, risultando particolarmente adatta all’esplorazione dei processi sociali e psicologici sottostanti. I dati passano attraverso le tre fasi di codifica - aperta, assiale, selettiva - e sono spesso elaborati con CAQDAS (Computer Aided Qualitative Data Analysis Software. In biblioteca, la metodologia GT è fondamentale per la piena comprensione dello "scarto" rappresentato da ciò che viene realmente fatto dal bibliotecario e ciò che viene percepito dall'utente. La ricerca nelle biblioteche perugine, condotta attraverso focus group e interviste semi-strutturate, ha portato in primo luogo alla consapevolezza che il concetto che l'utente ha della biblioteca è legato più al "luogo" e allo "spazio" piuttosto che al "servizio". Inoltre, le esigenze riscontrate durante la ricerca riguardano primariamente i campi che si occupano del coinvolgimento dell'utente, del rapporto della biblioteca con la scuola, dell'innovazione, della promozione di collezioni a scaffale aperto, della vivacità culturale, e degli aspetti logistico-architettonici.
This article presents a reflection on the application of Grounded Theory methodology in a study which aims at understanding how the identity of libraries is perceived by users. The Grounded Theory, elaborated in the sixties by the sociologists, Barney G. Glaser and Anselm L. Strauss, and widely applied today in empirical research in varied disciplines, is a methodology of social research and a combination of

15. The Lattice Compatibility Theory: Supports from the Generalized Simha-Somcynsky Chemical Physics-Related Theory

OpenAIRE

Boubaker, K; Colantoni, A; Petkova, P.

2013-01-01

The earliest models used in the study of lattice structures are mean field theories, which do not contain structural dependence. The Lattice Compatibility Theory (LCT) proposes here a novel framework where the measure of the disorder is based on Urbach tailing features and lattice matching features between the host matrix and doping agent intrinsic structures. This study has been implemented on a particular compound (BTO:Co) and refers to the Simha-Somcynsky (SS) theory, a mean field theory w...

16. Chemical Reaction Rates from Ring Polymer Molecular Dynamics: Theory and Practical Applications

CERN Document Server

Suleimanov, Yury V; Guo, Hua

2016-01-01

This Feature Article presents an overview of the current status of Ring Polymer Molecular Dynamics (RPMD) rate theory. We first analyze theory and its connection to quantum transition state theory. We then focus on its practical application to prototypical chemical reactions in the gas phase, which demonstrate how accurate and reliable RPMD is for calculating thermal chemical reaction rates in multifarious cases. This review serves as an important checkpoint in RPMD rate theory development, which shows that RPMD is shifting from being just one of recent novel ideas to a well-established and validated alternative to conventional techniques for calculating thermal chemical rates. We also hope it will motivate further applications of RPMD to various chemical reactions.

17. Empiricism or self-consistent theory in chemical kinetics?

International Nuclear Information System (INIS)

To give theoretical background for mechanochemical kinetics, we need first of all to find a possibility to predict the kinetic parameters for real chemical processes by determining rate constants and reaction orders without developing strictly specialized and, to a great extent, artificial models, i.e. to derive the kinetic law of mass action from 'first principles'. However, the kinetic law of mass action has had only an empirical basis from the first experiments of Gulberg and Waage until now, in contrast to the classical law of mass action for chemical equilibrium rigorously derived in chemical thermodynamics from equilibrium condition. Nevertheless, in this paper, an attempt to derive the kinetic law of mass action from 'first principles' is made in macroscopic formulation. It has turned out to be possible owing to the methods of thermodynamics of irreversible processes that were unknown in Gulberg and Waage's time

18. Device for applying organic chemicals to lysimeter surfaces; Applikationsvorrichtung fuer organische Chemikalien auf Lysimeteroberflaechen

Energy Technology Data Exchange (ETDEWEB)

Schroll, R. [GSF - Forschungszentrum fuer Umwelt und Gesundheit Neuherberg GmbH, Oberschleissheim (Germany). Inst. fuer Bodenoekologie

1999-02-01

One of the aims of environmental research at the GSF Research Centre for the Environment and Health is to determine the behaviour of environmentally consequential chemicals in terrestrial ecosystems under as natural conditions as possible. The GSF lysimeter plant in Neuherberg permits studying the environmental behaviour of organic chemicals in different soils. Collaborators at GSF have developed a means of applying -14-marked substances in field lysimeters so as to be able to refind released chemicals, identify their conversion products and set up mass balances for the chemicals. [Deutsch] Ein Ziel der Umweltforschung im GSF-Forschungszentrum fuer Umwelt und Gesundheit ist es, das Verhalten von Umweltchemikalien in terrestrischen Oekosystemen unter moeglichst natuerlichen Bedingungen zu bestimmen. In der GSF-Lysimeteranlage Neuherberg kann das Umweltverhalten von Organika in verschiedenen Boeden untersucht werden. Zur Wiedererkennung der ausgebrachten Chemikalie bzw. zur Identifizierung aus ihr entstandener Umwandlungsprodukte und letztendlich auch zur Erstellung einer Massenbilanz fuer das ausgebrachte Praeparat wurde in der GSF die Moeglichkeit geschaffen, {sup 14}C-markierte Substanzen in Freilandlysimetern applizieren zu koennen. (orig.)

19. Supporting Alternative Strategies for Learning Chemical Applications of Group Theory

Science.gov (United States)

Southam, Daniel C.; Lewis, Jennifer E.

2013-01-01

A group theory course for chemists was taught entirely with process oriented guided inquiry learning (POGIL) to facilitate alternative strategies for learning. Students completed a test of one aspect of visuospatial aptitude to determine their individual approaches to solving spatial tasks, and were sorted into groups for analysis on the basis of…

20. Comparison between two INAA methods applied to chemical characterization of ancient ceramics

International Nuclear Information System (INIS)

Two different instrumental neutron activation analysis (INAA) methods were applied to characterize chemically 74 ceramic roof tile samples, found in the town of Pella, Greece and dated back to the Hellenistic Period (3rd century B.C.). The samples were first analyzed for 17 elements with a 4 hour irradiation and two counts and then re-analyzed for 9 elements with a 1 minute irradiation and two counts of short-lived radioisotopes. The results of both methods were very similar, showing the validity of the rapid INAA method (1 min irradiation) in the study of ancient ceramics. All samples were divided into 4 chemical groups, each one representing a different tiling. (author) 11 refs.; 2 figs.; 3 tabs

1. The viscoplasticity theory applied to the inelastic analysis at elevated temperatures

International Nuclear Information System (INIS)

Monotonic and cyclic loading tests on strain rate changes are conducted on 2 1/4Cr-1Mo steel at 600deg C. The examination of the tensile stress-strain response suggests that the viscosity function which characterizes the rate-dependency in the viscosity theory used previously at room temperature should not only depend on the overstress but also on the strain. A new extended viscosity control function is introduced to represent such strain dependency. The material constants of this modified viscoplasticity model are determined at temperatures of 25deg C to 600deg C and the model is applied to deformation tests on 2 1/4Cr-1Mo steel carried out under time-varying temperature conditions and other conditions. The extended viscoplasticity theory is shown to reproduce such various experimentally observed stress-strain behavior at elevated temperatures. (orig.)

2. Quantitative Feedback Theory (QFT) applied to the design of a rotorcraft flight control system

Science.gov (United States)

Hess, R. A.; Gorder, P. J.

1992-01-01

Quantitative Feedback Theory describes a frequency-domain technique for the design of multi-input, multi-output control systems which meet time or frequency domain performance criteria when specified uncertainty exists in the linear description of the vehicle dynamics. Quantitative Feedback Theory is applied to the design of the longitudinal flight control system for a linear uncertain model of the AH-64 rotorcraft. In this model, the uncertainty is assigned, and is assumed to be attributable to actual uncertainty in the dynamic model and to the changes in the vehicle aerodynamic characteristics which occur near hover. The model includes an approximation to the rotor and actuator dynamics. The design example indicates the manner in which handling qualities criteria may be incorporated into the design of realistic rotorcraft control systems in which significant uncertainty exists in the vehicle model.

3. A generalized concept for cost-effective structural design. [Statistical Decision Theory applied to aerospace systems

Science.gov (United States)

Thomas, J. M.; Hawk, J. D.

1975-01-01

A generalized concept for cost-effective structural design is introduced. It is assumed that decisions affecting the cost effectiveness of aerospace structures fall into three basic categories: design, verification, and operation. Within these basic categories, certain decisions concerning items such as design configuration, safety factors, testing methods, and operational constraints are to be made. All or some of the variables affecting these decisions may be treated probabilistically. Bayesian statistical decision theory is used as the tool for determining the cost optimum decisions. A special case of the general problem is derived herein, and some very useful parametric curves are developed and applied to several sample structures.

4. The Bayesian statistical decision theory applied to the optimization of generating set maintenance

International Nuclear Information System (INIS)

The difficulty in RCM methodology is the allocation of a new periodicity of preventive maintenance on one equipment when a critical failure has been identified: until now this new allocation has been based on the engineer's judgment, and one must wait for a full cycle of feedback experience before to validate it. Statistical decision theory could be a more rational alternative for the optimization of preventive maintenance periodicity. This methodology has been applied to inspection and maintenance optimization of cylinders of diesel generator engines of 900 MW nuclear plants, and has shown that previous preventive maintenance periodicity can be extended. (authors). 8 refs., 5 figs

5. Chemical environments of submarine hydrothermal systems. [supporting abiogenetic theory

Science.gov (United States)

Shock, Everett L.

1992-01-01

The paper synthesizes diverse information about the inorganic geochemistry of submarine hydrothermal systems, provides a description of the fundamental physical and chemical properties of these systems, and examines the implications of high-temperature, fluid-driven processes for organic synthesis. Emphasis is on a few general features, i.e., pressure, temperature, oxidation states, fluid composition, and mineral alteration, because these features will control whether organic synthesis can occur in hydrothermal systems.

6. Application and development of quantum chemical methods. Density functional theory and valence bond theory

OpenAIRE

Ying, Fuming

2010-01-01

This thesis deals with two disjoint subdiciplines of quantum chemistry.  One isthe most used electronic structure method today, density functional theory(DFT), and the other one of the least used electronic structure methods,valence bond theory (VB).  The work on DFT is based on previous developments inthe department in density functional response theory and involves studies ofhyperfine coupling constants which are measured in electron paramagneticresonance experiments.  The method employed i...

International Nuclear Information System (INIS)

Food irradiation has anomalously been classified as a food additive rather than as a processing method. The justification for this is that chemical changes take place during the process. However, most foodstuffs consist of a large number of constituents, most of which are present in small concentrations. As a result, the amounts of radiolysis products which may be formed are far too low for identification and measurement, even by conventional analytical methods. Radiation-chemical knowledge is applied to determine the probable nature and concentration of reaction products produced in fruits. Fruits consist mainly of water and carbohydrates, with small amounts of protein, fat, inorganic material and vitamins as 'contaminants'. The real situation is exceedingly complex, but, using this simple model as a first approximation, predictions which may be verified in a relatively simple experimental scheme are made on the radiation stability of a typical fruit. Calculations using known radiation-chemical data show that, in the case of the mango, only carbohydrates are present in sufficient concentration and of sufficient sensitivity to merit attention from a toxicological viewpoint. Experimentally, the radiation sensitivity of numerous constituents of the fruit has been compared with that of glucose and, apart from a few exceptions whose concentrations are minimal, results obtained agree well with predicted values

8. Many-Electron Multiplet Theory Applied to O-Atom Vacancies in High-κ Dielectrics

Science.gov (United States)

Lucovsky, Gerald; Miotti, Leonardo; Paz Bastos, Karen

2011-04-01

Two-electron multiplet theory has been used to develop a high-spin effective d2 model for O-vacancy spin-allowed and spin-forbidden dipole transitions, and for negative ion state traps. The transition and negative ion states have been detected by X-ray absorption spectroscopy in the O K pre-edge regime of transition metal (TM) elemental oxides and complex oxides. Occupied ground and excited states of the model satisfy Hund's rules by (i) including only high-spin state arrangements and (ii) using many electron state term symbols consistent with Russell-Saunders coupling. Qualitative and quantitative agreement between theory and experiment is demonstrated by using Tanabe-Sugano energy level diagrams for (i) identifying the symmetries and spin states, and (ii) determining the relative energies of intra-d-state transitions that are allowed in the presence of an intermediate strength ligand field. This includes removal of the spin degeneracy for the allowed transitions by a cooperative Jahn-Teller effect. The effective d2 model is applied to nanocrystalline thin films of ZrO2, HfO2, TiO2, and Lu2O3 and to illustrate the agreement between the new d2 model and the X-ray absorption spectroscopy data. The new model has also been applied with the same degree of success to complex TM oxides and SiO2.

9. Mathematical model of Lame Problem for Simplified Elastic Theory applied to Controlled-Clearance Pressure Balances

CERN Document Server

Silvano, Saragosa

2010-01-01

This paper is based on the original work of the master degree thesis [1] and also represents a revision of the models and the correlations with the analytical solutions given by other authors in the previous publications from 2003 to 2007. All the publications from 2003 to 2007 about simplified analytical methods applied to controlled-clearance pressure balances are not original re-elaborations (with some errors) of the thesis[1]. The analysis described in this paper starts with the mathematical model of thick-walled cylinder based on the solution of the Lame Equations applied to Mechanical theory of elastic equilibrium [5] for the formulation of the so called Simplified Elastic Theory that represents an analytical approach used in the study of the pressure balances. This analysis is well known as Lame problem. The solution of the Lame problem is used to determine the pressure distortion coefficient of controlled-clearance pressure balances. The analysis in this paper includes the case of pressure balances wi...

10. Development of the applied mathematics originating from the group theory of physical and mathematical problems

Energy Technology Data Exchange (ETDEWEB)

Hyman, J.; Beyer, W.; Louck, J.; Metropolis, N.

1996-07-01

This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Group theoretical methods are a powerful tool both in their applications to mathematics and to physics. The broad goal of this project was to use such methods to develop the implications of group (symmetry) structures underlying models of physical systems, as well as to broaden the understanding of simple models of chaotic systems. The main thrust was to develop further the complex mathematics that enters into many-particle quantum systems with special emphasis on the new directions in applied mathematics that have emerged and continue to surface in these studies. In this area, significant advances in understanding the role of SU(2) 3nj-coefficients in SU(3) theory have been made and in using combinatoric techniques in the study of generalized Schur functions, discovered during this project. In the context of chaos, the study of maps of the interval and the associated theory of words has led to significant discoveries in Galois group theory, to the classification of fixed points, and to the solution of a problem in the classification of DNA sequences.

11. Documenting genomics: Applying archival theory to preserving the records of the Human Genome Project

Science.gov (United States)

Shaw, Jennifer

2016-01-01

The Human Genome Archive Project (HGAP) aimed to preserve the documentary heritage of the UK's contribution to the Human Genome Project (HGP) by using archival theory to develop a suitable methodology for capturing the results of modern, collaborative science. After assessing past projects and different archival theories, the HGAP used an approach based on the theory of documentation strategy to try to capture the records of a scientific project that had an influence beyond the purely scientific sphere. The HGAP was an archival survey that ran for two years. It led to ninety scientists being contacted and has, so far, led to six collections being deposited in the Wellcome Library, with additional collections being deposited in other UK repositories. In applying documentation strategy the HGAP was attempting to move away from traditional archival approaches to science, which have generally focused on retired Nobel Prize winners. It has been partially successful in this aim, having managed to secure collections from people who are not ‘big names’, but who made an important contribution to the HGP. However, the attempt to redress the gender imbalance in scientific collections and to improve record-keeping in scientific organisations has continued to be difficult to achieve. PMID:26388555

12. Fundamental mode perturbation theory applied to reactor experiment calculations using small samples of fast multiplying media

International Nuclear Information System (INIS)

A new method for the interpretation of the reactivity experiments is presented. The method employed is the first order perturbation theory in the fondamental mode formalism. The method can be employed in the interpretation of absolute experiments (measurements of buckling, critical mass, etc) as well differential experiments. The diffusion and transport theories are parallely employed. The method is developed for different approximations of the scattering and for the geometries in one and two dimensions. The problem of the estimation of the first order approximation in the perturbation theory has been analysed. This analysis enables the definition of a new criterion which depends upon the quantities that one can calculates by means of the fondamental mode codes. Numerous problems of practical application of the method have been analysed: the elimination of parasitic effects (interface effects, streaming effects), the application of the multigroupe formalism instead of the exact formalism, etc. The method is applied to the interpretation of experiments of different types: sodium void in uranium and plutonium lattices, the substitution experiments of iron oxide (Fe2O3) and the oscillation experiments realised with plutonium samples rich in plutonium high isotopes. The use of the first order approximation enables to exploit the superposition principle; the differential effects (measured or/and calculated) may be added. This is a very interesting particularity for the interpretation as well for the practical realisation of experiments. It is shown that the class of experiments which are interpretable by this new method is very large

13. An effective theory for QCD with an axial chemical potential

CERN Document Server

Andrianov, Alexander A; Espriu, Domenec; Planells, Xumeu

2013-01-01

We consider the low energy realization of QCD in terms of meson fields when an axial chemical potential is present; a situation that may be relevant in heavy ion collisions. We shall demonstrate that the presence of an axial charge constitutes an explicit source of parity breaking. The eigenstates of strong interactions do not have a definite parity and interactions that would otherwise be forbidden compete with the familiar ones. In this work, we first focus on scalars and pseudoscalars that are described by a generalized linear sigma model; and next, we give some hints on how the Vector Meson Dominance model describes the vector sector.

14. EDXRF applied to the chemical element determination of small invertebrate samples

Energy Technology Data Exchange (ETDEWEB)

Magalhaes, Marcelo L.R.; Santos, Mariana L.O.; Cantinha, Rebeca S.; Souza, Thomas Marques de; Franca, Elvis J. de, E-mail: marcelo_rlm@hotmail.com, E-mail: marianasantos_ufpe@hotmail.com, E-mail: rebecanuclear@gmail.com, E-mail: thomasmarques@live.com.pt, E-mail: ejfranca@cnen.gov.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

2015-07-01

Energy Dispersion X-Ray Fluorescence - EDXRF is a fast analytical technique of easy operation, however demanding reliable analytical curves due to the intrinsic matrix dependence and interference during the analysis. By using biological materials of diverse matrices, multielemental analytical protocols can be implemented and a group of chemical elements could be determined in diverse biological matrices depending on the chemical element concentration. Particularly for invertebrates, EDXRF presents some advantages associated to the possibility of the analysis of small size samples, in which a collimator can be used that directing the incidence of X-rays to a small surface of the analyzed samples. In this work, EDXRF was applied to determine Cl, Fe, P, S and Zn in invertebrate samples using the collimator of 3 mm and 10 mm. For the assessment of the analytical protocol, the SRM 2976 Trace Elements in Mollusk produced and SRM 8415 Whole Egg Powder by the National Institute of Standards and Technology - NIST were also analyzed. After sampling by using pitfall traps, invertebrate were lyophilized, milled and transferred to polyethylene vials covered by XRF polyethylene. Analyses were performed at atmosphere lower than 30 Pa, varying voltage and electric current according to the chemical element to be analyzed. For comparison, Zn in the invertebrate material was also quantified by graphite furnace atomic absorption spectrometry after acid treatment (mixture of nitric acid and hydrogen peroxide) of samples have. Compared to the collimator of 10 mm, the SRM 2976 and SRM 8415 results obtained by the 3 mm collimator agreed well at the 95% confidence level since the E{sub n} Number were in the range of -1 and 1. Results from GFAAS were in accordance to the EDXRF values for composite samples. Therefore, determination of some chemical elements by EDXRF can be recommended for very small invertebrate samples (lower than 100 mg) with advantage of preserving the samples. (author)

15. EDXRF applied to the chemical element determination of small invertebrate samples

International Nuclear Information System (INIS)

Energy Dispersion X-Ray Fluorescence - EDXRF is a fast analytical technique of easy operation, however demanding reliable analytical curves due to the intrinsic matrix dependence and interference during the analysis. By using biological materials of diverse matrices, multielemental analytical protocols can be implemented and a group of chemical elements could be determined in diverse biological matrices depending on the chemical element concentration. Particularly for invertebrates, EDXRF presents some advantages associated to the possibility of the analysis of small size samples, in which a collimator can be used that directing the incidence of X-rays to a small surface of the analyzed samples. In this work, EDXRF was applied to determine Cl, Fe, P, S and Zn in invertebrate samples using the collimator of 3 mm and 10 mm. For the assessment of the analytical protocol, the SRM 2976 Trace Elements in Mollusk produced and SRM 8415 Whole Egg Powder by the National Institute of Standards and Technology - NIST were also analyzed. After sampling by using pitfall traps, invertebrate were lyophilized, milled and transferred to polyethylene vials covered by XRF polyethylene. Analyses were performed at atmosphere lower than 30 Pa, varying voltage and electric current according to the chemical element to be analyzed. For comparison, Zn in the invertebrate material was also quantified by graphite furnace atomic absorption spectrometry after acid treatment (mixture of nitric acid and hydrogen peroxide) of samples have. Compared to the collimator of 10 mm, the SRM 2976 and SRM 8415 results obtained by the 3 mm collimator agreed well at the 95% confidence level since the En Number were in the range of -1 and 1. Results from GFAAS were in accordance to the EDXRF values for composite samples. Therefore, determination of some chemical elements by EDXRF can be recommended for very small invertebrate samples (lower than 100 mg) with advantage of preserving the samples. (author)

16. Dynamics of prebiotic RNA reproduction illuminated by chemical game theory.

Science.gov (United States)

Yeates, Jessica A M; Hilbe, Christian; Zwick, Martin; Nowak, Martin A; Lehman, Niles

2016-05-01

Many origins-of-life scenarios depict a situation in which there are common and potentially scarce resources needed by molecules that compete for survival and reproduction. The dynamics of RNA assembly in a complex mixture of sequences is a frequency-dependent process and mimics such scenarios. By synthesizing Azoarcus ribozyme genotypes that differ in their single-nucleotide interactions with other genotypes, we can create molecules that interact among each other to reproduce. Pairwise interplays between RNAs involve both cooperation and selfishness, quantifiable in a 2 × 2 payoff matrix. We show that a simple model of differential equations based on chemical kinetics accurately predicts the outcomes of these molecular competitions using simple rate inputs into these matrices. In some cases, we find that mixtures of different RNAs reproduce much better than each RNA type alone, reflecting a molecular form of reciprocal cooperation. We also demonstrate that three RNA genotypes can stably coexist in a rock-paper-scissors analog. Our experiments suggest a new type of evolutionary game dynamics, called prelife game dynamics or chemical game dynamics. These operate without template-directed replication, illustrating how small networks of RNAs could have developed and evolved in an RNA world. PMID:27091972

17. Quantitative tools for comparing animal communication systems: information theory applied to bottlenose dolphin whistle repertoires.

Science.gov (United States)

McCOWAN; Hanser; Doyle

1999-02-01

Comparative analysis of nonhuman animal communication systems and their complexity, particularly in comparison to human language, has been generally hampered by both a lack of sufficiently extensive data sets and appropriate analytic tools. Information theory measures provide an important quantitative tool for examining and comparing communication systems across species. In this paper we use the original application of information theory, that of statistical examination of a communication system's structure and organization. As an example of the utility of information theory to the analysis of animal communication systems, we applied a series of information theory statistics to a statistically categorized set of bottlenose dolphin Tursiops truncatus, whistle vocalizations. First, we use the first-order entropic relation in a Zipf-type diagram (Zipf 1949 Human Behavior and the Principle of Least Effort) to illustrate the application of temporal statistics as comparative indicators of repertoire complexity, and as possible predictive indicators of acquisition/learning in animal vocal repertoires. Second, we illustrate the need for more extensive temporal data sets when examining the higher entropic orders, indicative of higher levels of internal informational structure, of such vocalizations, which could begin to allow the statistical reconstruction of repertoire organization. Third, we propose using 'communication capacity' as a measure of the degree of temporal structure and complexity of statistical correlation, represented by the values of entropic order, as an objective tool for interspecies comparison of communication complexity. In doing so, we introduce a new comparative measure, the slope of Shannon entropies, and illustrate how it potentially can be used to compare the organizational complexity of vocal repertoires across a diversity of species. Finally, we illustrate the nature and predictive application of these higher-order entropies using a preliminary

18. The theory of critical distances applied to problems in fracture and fatigue of bone

Directory of Open Access Journals (Sweden)

Emma Brazel

2009-10-01

Full Text Available The theory of critical distances (TCD has been applied to predict notch-based fracture and fatigue in a wide range of materials and components. The present paper describes a series of projects in which we applied this approach to human bone. Using experimental data from the literature, combined with finite element analysis, we showed that the TCD was able to predict the effect of notches and holes on the strength of bone failing in brittle fracture due to monotonic loading, in different loading regimes. Bone also displays short crack effects, leading to R-curve data for both fracture toughness and fatigue crack propagation thresholds; we showed that the TCD could predict this data. This analysis raised a number of questions for discussion, such as the significance of the L value itself in this and other materials. Finally, we applied the TCD to a practical problem in orthopaedic surgery: the management of bone defects, showing that predictions could be made which would enable surgeons to decide on whether a bone graft material would be needed to repair a defect, and to specify what mechanical properties this material should have.

19. Quasi-chemical Theory for the Statistical Thermodynamics of the Hard Sphere Fluid

CERN Document Server

Pratt, L R; Gómez, M A; Gentile, M E; Pratt, Lawrence R.; Violette, Randall A. La; Gomez, Maria A.; Gentile, Mary E.

2001-01-01

We develop a quasi-chemical theory for the study of packing thermodynamics in dense liquids. The situation of hard-core interactions is addressed by considering the binding of solvent molecules to a precisely defined cavity' in order to assess the probability that the `cavity' is entirely evacuated. The primitive quasi-chemical approximation corresponds to a extension of the Poisson distribution used as a default model in an information theory approach. This primitive quasi-chemical theory is in good qualitative agreement with the observations for the hard sphere fluid of occupancy distributions that are central to quasi-chemical theories but begins to be quantitatively erroneous for the equation of state in the dense liquid regime of $\\rho d^3>$0.6. How the quasi-chemical approach can be iterated to treat correlation effects is addressed. Consideration of neglected correlation effects leads to a simple model for the form of those contributions neglected by the primitive quasi-chemical approximation. These c...

20. Quasi-chemical Theory and the Statistical Thermodynamics of the Hard Sphere Fluid

Energy Technology Data Exchange (ETDEWEB)

Pratt, L. R.; Laviolette, Randall Alexander; Gomez, M. A.; Gentile, M.

2001-09-01

We develop a quasi-chemical theory for the study of packing thermodynamics in dense liquids. The situation of hard-core interactions is addressed by considering the binding of solvent molecules to a precisely defined cavity in order to assess the probability that the cavity is entirely evacuated. The primitive quasi-chemical approximation corresponds to an extension of the Poisson distribution used as a default model in an information theory approach. This primitive quasi-chemical theory is in good qualitative agreement with the observations for the hard-sphere fluid of occupancy distributions that are central to quasi-chemical theories but begins to be quantitatively erroneous for the equation of state in the dense liquid regime of d3 > 0.6. How the quasi-chemical approach can be iterated to treat correlation effects is addressed. Consideration of neglected correlation effects leads to a simple model for the form of those contributions neglected by the primitive quasi-chemical approximation. These considerations, supported by simulation observations, identify a "break away" phenomena that requires special thermodynamic consideration for the zero (0) occupancy case as distinct from the rest of the distribution. An empirical treatment leads to a one-parameter model occupancy distribution that accurately fits the hard-sphere equation of state and observed distributions.

1. Generalised perturbation theory and source of information through chemical measurements

International Nuclear Information System (INIS)

It is important to make all analyses and collect all information from the work of the new facility (which the transmutation demonstration unit will surely be) to be sure that the operation corresponds to the forecast or to correct the equations of the facility. The behaviour of the molten salt reactor and in particular the system of measurement are very different from that of the solid fuel reactor. Key information from the long time kinetics could be the nearly on line knowledge of the fuel composition. In this work it is shown how to include it into the control and use such data for the correction of neutron cross-sections for the high actinides or other characteristics. Also the problem of safety - change of the boundary problem to the initial problem - is mentioned. The problem is transformed into the generalised perturbation theory in which the adjoint function is obtained through the solution of the equations with right hand side having the form of source. Such an approach should be a theoretical base for the calculation of the sensitivity coefficients. (authors)

2. Porous chitosan scaffold cross-linked by chemical and natural procedure applied to investigate cell regeneration

International Nuclear Information System (INIS)

Highlights: ► Polymeric scaffolds, made from chitosan-based films fixed by chemical (citrate) or natural method (genipin), were developed. ► Nano-indentation with a constant harmonic frequency was applied on porous scaffolds to explore their surface mechanics. ► The relationship between surface mechanical property and cell-surface interactions of scaffold materials was demonstrated. ► Porous scaffolds cross-linked by genipin showed adequate cell affinity, non-toxicity, and suitable mechanical properties. - Abstract: Porous chitosan scaffold is used for tissue engineering and drug delivery, but is limited as a scaffold material due to its mechanical weakness, which restrains cell adhesion on the surface. In this study, a chemical reagent (citrate) and a natural reagent (genipin) are used as cross-linkers for the formation of chitosan-based films. Nanoindentation technique with a continuous stiffness measurement system is particularly applied on the porous scaffold surface to examine the characteristic modulus and nanohardness of a porous scaffold surface. The characteristic modulus of a genipin-cross-linked chitosan surface is ≈2.325 GPa, which is significantly higher than that of an uncross-linked one (≈1.292 GPa). The cell-scaffold surface interaction is assessed. The cell morphology and results of an MTS assay of 3T3-fibroblast cells of a genipin-cross-linked chitosan surface indicate that the enhancement of mechanical properties induced cell adhesion and proliferation on the modified porous scaffold surface. The pore size and mechanical properties of porous chitosan film can be tuned for specific applications such as tissue regeneration.

3. Sender-receiver systems and applying information theory for quantitative synthetic biology.

Science.gov (United States)

Barcena Menendez, Diego; Senthivel, Vivek Raj; Isalan, Mark

2015-02-01

Sender-receiver (S-R) systems abound in biology, with communication systems sending information in various forms. Information theory provides a quantitative basis for analysing these processes and is being applied to study natural genetic, enzymatic and neural networks. Recent advances in synthetic biology are providing us with a wealth of artificial S-R systems, giving us quantitative control over networks with a finite number of well-characterised components. Combining the two approaches can help to predict how to maximise signalling robustness, and will allow us to make increasingly complex biological computers. Ultimately, pushing the boundaries of synthetic biology will require moving beyond engineering the flow of information and towards building more sophisticated circuits that interpret biological meaning. PMID:25282688

4. Applying Total Physical Response(TPR)Theory to Teaching Chinese Children English

Institute of Scientific and Technical Information of China (English)

张院院

2015-01-01

Now it has become a fashion in our society that young learners aged from 6 or even younger participate in foreign language learning.With the Second Language Acquisition theories,it is believed that learning a foreign language from the childhood can facilitate the learning.Children need a teaching method which conforms to their psychological and physical characteristics.American psychologist James Asher develops Total Physical Response,which advocates leaning through physical actions.He believes that children should learn a foreign language happily and confidently,just like the process of acquiring their mother tongue.However,Total Physical Response can not be applied effectively in the teaching process due to children’s instincts and characteristics.If there is a way or strategy which takes advantage of children’s characteristics and control their behavior in class,the teaching results would be more satisfying.

5. Optimal control theory (OWEM) applied to a helicopter in the hover and approach phase

Science.gov (United States)

Born, G. J.; Kai, T.

1975-01-01

A major difficulty in the practical application of linear-quadratic regulator theory is how to choose the weighting matrices in quadratic cost functions. The control system design with optimal weighting matrices was applied to a helicopter in the hover and approach phase. The weighting matrices were calculated to extremize the closed loop total system damping subject to constraints on the determinants. The extremization is really a minimization of the effects of disturbances, and interpreted as a compromise between the generalized system accuracy and the generalized system response speed. The trade-off between the accuracy and the response speed is adjusted by a single parameter, the ratio of determinants. By this approach an objective measure can be obtained for the design of a control system. The measure is to be determined by the system requirements.

6. Applying Monte Carlo Concept and Linear Programming in Modern Portfolio Theory to Obtain Best Weighting Structure

Directory of Open Access Journals (Sweden)

Tumpal Sihombing

2013-01-01

Full Text Available The world is entering the era of recession when the trend is bearish and market is not so favorable. The capital markets in every major country were experiencing great amount of loss and people suffered in their investment. The Jakarta Composite Index (JCI has shown a great downturn for the past one year but the trend bearish year of the JCI. Therefore, rational investors should consider restructuring their portfolio to set bigger proportion in bonds and cash instead of stocks. Investors can apply modern portfolio theory by Harry Markowitz to find the optimum asset allocation for their portfolio. Higher return is always associated with higher risk. This study shows investors how to find out the lowest risk of a portfolio investment by providing them with several structures of portfolio weighting. By this way, investor can compare and make the decision based on risk-return consideration and opportunity cost as well.

7. Applying the proto-theory of design to explain and modify the parameter analysis method of conceptual design

OpenAIRE

Kroll, Ehud; Koskela, Lauri

2016-01-01

This article reports on the outcomes of applying the notions provided by the reconstructed proto-theory of design, based on Aristotle’s remarks, to the parameter analysis (PA) method of conceptual design. Two research questions are addressed: (1) What further clarification and explanation to the approach of PA is provided by the proto-theory? (2) Which conclusions can be drawn from the study of an empirically derived design approach through the proto-theory regarding usefulness, validity a...

8. Design & Choice of Media by Applying the Theory of Transactional Distance

Institute of Scientific and Technical Information of China (English)

Paul Kawachi

2004-01-01

This Paper presents a series of empirical studies involving approx.850 students to show how flexibility in course design should be informed by the student's culture and native language (L1), gender, and age, and explains how to decide on the most appropriate learning technology in course design by applying the Theory of Transactional Distance. Curves are presented to show how academic English reading rates online and offline are affected by the L1, gender, and age (over a wide age range 18 81 years old). To prevent inequitable culturally distinct overload, course design should be modified using hypertext. Choice of media--in particular synchronous versus asynchronous media--is decided according to the Theory of Transactional Distance. This theory is here extended from tutor to one student to multiple students in a group, and the masculinity can be modified. Briefly, at initial maximal distance (D-S-) early on, the community is fostered with synchronous media for cooperative group learning, followed by (D-S+) collaborative learning using one of two frameworks presented to ensure constructivism in asynchronous mode, then (D-S+) collaborative for Guided Didactic Conversation in asynchronous mode, and finally (D+ S-) cooperatively in synchronous mode for reflective sharing of course learning experiences. At each transactional distance, or in each mode, hypertext is purposively designed to complement the cooperative or collaborative style to provide self access support (additional analysis and reasoning to cooperative, and examples to collaborative) to provide equitable content and quality of learning across wide cultural and L1 ranges, to remove gender bias, and to accommodate variations due to student age. Thus, to promote student autonomy and lifelong learning.

9. Applying behavioral theories to invasive animal management: Towards an integrated framework.

Science.gov (United States)

McLeod, Lynette J; Hine, Donald W; Please, Patricia M; Driver, Aaron B

2015-09-15

Invasive species wreak an estimated $1.4 trillion in damages globally, each year. To have any hope of reducing this damage, best-practice control strategies must incorporate behavior change interventions. Traditional interventions, based on the knowledge-transfer model, assume that if land managers are properly educated about risks and strategies, they will develop supportive attitudes and implement appropriate control strategies. However, the social sciences have produced a large number of behavioral models and frameworks that demonstrate that knowledge transfer, by itself, fails to change behavior. The challenge then lies in knowing which behavioral model to choose, and when, from a potentially overwhelming 'universe'. In this paper, we review nine behavior theories relevant to invasive species management. We then introduce the Behavior Change Wheel as a tool for integrating these theories into a single practical framework. This framework links drivers of and barriers to behavior change with intervention strategies and policies, in what we consider, from an applied perspective, to be an important advance. PMID:26151198 10. Microeconomic Surplus in Health Care: Applied Economic Theory in Health Care in Four European Countries Science.gov (United States) Walzer, S.; Nuijten, M.; Wiesner, C.; Kaier, K.; Johansson, P-O.; Oertel, S. 2013-01-01 Introduction: In economic theory economic surplus refers to two related quantities: Consumer and producer surplus. Applying this theory to health care “convenience” could be one way how consumer benefits might manifest itself. Methods: Various areas of economic surplus were identified and subsequently screened and analyzed in Germany, Spain, The Netherlands, and the UK: Cesarean births, emergency room visits (nights or weekends), drug availability after test results, and response surplus. A targeted literature search was being conducted to identify the associated costs. Finally the economic surplus (convenience value) was calculated. Results: The economic surplus for different health care areas was being calculated. The highest economic surplus was obtained for the example of response surplus IVF-treatments in The Netherlands. Conclusion: The analyzed examples in this article support the underlying hypothesis for this research: “Value of convenience defined as the consumer surplus in health care can be shown in different health care settings.” Again, this hypothesis should be accepted as a starting point in this research area and hence further primary research is strongly recommended in order to fully proof this concept. PMID:23423475 11. Distribution function approach to redshift space distortions. Part V: perturbation theory applied to dark matter halos Energy Technology Data Exchange (ETDEWEB) Vlah, Zvonimir; Seljak, Uroš [Institute for Theoretical Physics, University of Zürich, Zürich (Switzerland); Okumura, Teppei [Institute for the Early Universe, Ewha Womans University, Seoul, S. Korea (Korea, Republic of); Desjacques, Vincent, E-mail: zvlah@physik.uzh.ch, E-mail: seljak@physik.uzh.ch, E-mail: teppei@ewha.ac.kr, E-mail: Vincent.Desjacques@unige.ch [Département de Physique Théorique and Center for Astroparticle Physics (CAP) Université de Genéve, Genéve (Switzerland) 2013-10-01 Numerical simulations show that redshift space distortions (RSD) introduce strong scale dependence in the power spectra of halos, with ten percent deviations relative to linear theory predictions even on relatively large scales (k < 0.1h/Mpc) and even in the absence of satellites (which induce Fingers-of-God, FoG, effects). If unmodeled these effects prevent one from extracting cosmological information from RSD surveys. In this paper we use Eulerian perturbation theory (PT) and Eulerian halo biasing model and apply it to the distribution function approach to RSD, in which RSD is decomposed into several correlators of density weighted velocity moments. We model each of these correlators using PT and compare the results to simulations over a wide range of halo masses and redshifts. We find that with an introduction of a physically motivated halo biasing, and using dark matter power spectra from simulations, we can reproduce the simulation results at a percent level on scales up to k ∼ 0.15h/Mpc at z = 0, without the need to have free FoG parameters in the model. 12. Microeconomic surplus in health care: Applied economic theory in health care in four European countries Directory of Open Access Journals (Sweden) Stefan eWalzer 2013-02-01 Full Text Available Introduction: In economic theory economic surplus refers to two related quantities: Consumer and producer surplus. Applying this theory to health care convenience could be one way how consumer benefits might manifest itself. Methods: Various areas of economic surplus were identified and subsequently screened and analysed in Germany, Spain, The Netherlands and the UK: Caesarean births, emergency room visits (nights or weekends, drug availability after test results, and response surplus. A targeted literature search was being conducted to identify the associated costs. Finally the economic surplus (convenience value was calculated.Results: The economic surplus for different health care areas was being calculated. The highest economic surplus was obtained for the example of response surplus IVF-treatments in The Netherlands.Conclusions: The analyzed examples in this article support the underlying hypothesis for this research: Value of convenience defined as the consumer surplus in health care can be shown in different health care settings. Again, this hypothesis should be accepted as a starting point in this research area and hence further primary research is strongly recommended in order to fully proof this concept. 13. Open-air type plasma chemical vaporization machining by applying pulse-width modulation control Science.gov (United States) Takeda, Yoshiki; Hata, Yuki; Endo, Katsuyoshi; Yamamura, Kazuya 2014-03-01 Photolithography techniques have been used to enable the low-cost and high-speed transfer of a pattern onto a silicon wafer. However, owing to the high integration of semiconductors, extreme ultraviolet will be increasingly used as the exposure light source and all optics must be reflective to focus light because the wavelength of the light will be so short that it cannot pass through a lens. The form accuracy of reflective optics affects the accuracy of transfer, and a flatness of less than 32 nm on a 6 inch photomask substrate is required according to the International Technology Roadmap for Semiconductors roadmap. Plasma chemical vaporization machining is an ultraprecise figuring technique that enables a form accuracy of nanometre order to be obtained. In our previous study, the removal volume was controlled by changing the scanning speed of the worktable. However, a discrepancy between the theoretical scanning speed and the actual scanning speed occurred owing to the inertia of the worktable when the change in speed was rapid. As an attempt to resolve this issue, we controlled the removal volume by controlling the electric power applied during plasma generation while maintaining a constant scanning speed. The methods that we adapted to control the applied electric power were amplitude-modulation (AM) control and pulse-width modulation (PWM) control. In this work, we evaluate the controllability of the material removal rate in the AM and PWM control modes. 14. Open-air type plasma chemical vaporization machining by applying pulse-width modulation control International Nuclear Information System (INIS) Photolithography techniques have been used to enable the low-cost and high-speed transfer of a pattern onto a silicon wafer. However, owing to the high integration of semiconductors, extreme ultraviolet will be increasingly used as the exposure light source and all optics must be reflective to focus light because the wavelength of the light will be so short that it cannot pass through a lens. The form accuracy of reflective optics affects the accuracy of transfer, and a flatness of less than 32 nm on a 6 inch photomask substrate is required according to the International Technology Roadmap for Semiconductors roadmap. Plasma chemical vaporization machining is an ultraprecise figuring technique that enables a form accuracy of nanometre order to be obtained. In our previous study, the removal volume was controlled by changing the scanning speed of the worktable. However, a discrepancy between the theoretical scanning speed and the actual scanning speed occurred owing to the inertia of the worktable when the change in speed was rapid. As an attempt to resolve this issue, we controlled the removal volume by controlling the electric power applied during plasma generation while maintaining a constant scanning speed. The methods that we adapted to control the applied electric power were amplitude-modulation (AM) control and pulse-width modulation (PWM) control. In this work, we evaluate the controllability of the material removal rate in the AM and PWM control modes. (paper) 15. Applying Chemical Imaging Analysis to Improve Our Understanding of Cold Cloud Formation Science.gov (United States) Laskin, A.; Knopf, D. A.; Wang, B.; Alpert, P. A.; Roedel, T.; Gilles, M. K.; Moffet, R.; Tivanski, A. 2012-12-01 The impact that atmospheric ice nucleation has on the global radiation budget is one of the least understood problems in atmospheric sciences. This is in part due to the incomplete understanding of various ice nucleation pathways that lead to ice crystal formation from pre-existing aerosol particles. Studies investigating the ice nucleation propensity of laboratory generated particles indicate that individual particle types are highly selective in their ice nucleating efficiency. This description of heterogeneous ice nucleation would present a challenge when applying to the atmosphere which contains a complex mixture of particles. Here, we employ a combination of micro-spectroscopic and optical single particle analytical methods to relate particle physical and chemical properties with observed water uptake and ice nucleation. Field-collected particles from urban environments impacted by anthropogenic and marine emissions and aging processes are investigated. Single particle characterization is provided by computer controlled scanning electron microscopy with energy dispersive analysis of X-rays (CCSEM/EDX) and scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS). A particle-on-substrate approach coupled to a vapor controlled cooling-stage and a microscope system is applied to determine the onsets of water uptake and ice nucleation including immersion freezing and deposition ice nucleation as a function of temperature (T) as low as 200 K and relative humidity (RH) up to water saturation. We observe for urban aerosol particles that for T > 230 K the oxidation level affects initial water uptake and that subsequent immersion freezing depends on particle mixing state, e.g. by the presence of insoluble particles. For T cloud formation. Initial results applying single particle IN analysis using CCSEM/EDX and STXM/NEXAFS reveal that a significant amount of IN are coated by organics and, thus, are similar to the 16. Applying Dynamical Systems Theory to Optimize Libration Point Orbit Stationkeeping Maneuvers for WIND Science.gov (United States) Brown, Jonathan M.; Petersen, Jeremy D. 2014-01-01 NASA's WIND mission has been operating in a large amplitude Lissajous orbit in the vicinity of the interior libration point of the Sun-Earth/Moon system since 2004. Regular stationkeeping maneuvers are required to maintain the orbit due to the instability around the collinear libration points. Historically these stationkeeping maneuvers have been performed by applying an incremental change in velocity, or (delta)v along the spacecraft-Sun vector as projected into the ecliptic plane. Previous studies have shown that the magnitude of libration point stationkeeping maneuvers can be minimized by applying the (delta)v in the direction of the local stable manifold found using dynamical systems theory. This paper presents the analysis of this new maneuver strategy which shows that the magnitude of stationkeeping maneuvers can be decreased by 5 to 25 percent, depending on the location in the orbit where the maneuver is performed. The implementation of the optimized maneuver method into operations is discussed and results are presented for the first two optimized stationkeeping maneuvers executed by WIND. 17. Quantum correlated cluster mean-field theory applied to the transverse Ising model Science.gov (United States) Zimmer, F. M.; Schmidt, M.; Maziero, Jonas 2016-06-01 Mean-field theory (MFT) is one of the main available tools for analytical calculations entailed in investigations regarding many-body systems. Recently, there has been a surge of interest in ameliorating this kind of method, mainly with the aim of incorporating geometric and correlation properties of these systems. The correlated cluster MFT (CCMFT) is an improvement that succeeded quite well in doing that for classical spin systems. Nevertheless, even the CCMFT presents some deficiencies when applied to quantum systems. In this article, we address this issue by proposing the quantum CCMFT (QCCMFT), which, in contrast to its former approach, uses general quantum states in its self-consistent mean-field equations. We apply the introduced QCCMFT to the transverse Ising model in honeycomb, square, and simple cubic lattices and obtain fairly good results both for the Curie temperature of thermal phase transition and for the critical field of quantum phase transition. Actually, our results match those obtained via exact solutions, series expansions or Monte Carlo simulations. 18. Dimensional analysis and extended hydrodynamic theory applied to long-rod penetration of ceramics Directory of Open Access Journals (Sweden) J.D. Clayton 2016-08-01 Full Text Available Principles of dimensional analysis are applied in a new interpretation of penetration of ceramic targets subjected to hypervelocity impact. The analysis results in a power series representation – in terms of inverse velocity – of normalized depth of penetration that reduces to the hydrodynamic solution at high impact velocities. Specifically considered are test data from four literature sources involving penetration of confined thick ceramic targets by tungsten long rod projectiles. The ceramics are AD-995 alumina, aluminum nitride, silicon carbide, and boron carbide. Test data can be accurately represented by the linear form of the power series, whereby the same value of a single fitting parameter applies remarkably well for all four ceramics. Comparison of the present model with others in the literature (e.g., Tate's theory demonstrates a target resistance stress that depends on impact velocity, linearly in the limiting case. Comparison of the present analysis with recent research involving penetration of thin ceramic tiles at lower typical impact velocities confirms the importance of target properties related to fracture and shear strength at the Hugoniot Elastic Limit (HEL only in the latter. In contrast, in the former (i.e., hypervelocity and thick target experiments, the current analysis demonstrates dominant dependence of penetration depth only by target mass density. Such comparisons suggest transitions from microstructure-controlled to density-controlled penetration resistance with increasing impact velocity and ceramic target thickness. 19. Applying Fear Appeals Theory for Preventing Drug Abuse among Male High School Students in Tehran Directory of Open Access Journals (Sweden) K. Witte 2006-10-01 Full Text Available Introduction & Objective: Drug abuse is one of the complicated phenomenons in the human communities that it produces health problems. The effect of applying fear appeal message on attitudes and intention against drug abuse, drug resistance skills, knowledge about side effect of drugs and drug abuse related behaviors among male high school students was studied based on applying extended parallel process model as a theoretical framework. Materials & Methods: Two high schools were chosen from six state high schools as an intervention (n=86 and control (n=97 groups. Educational curriculum, that was designed, based on students’ educational needs, appealed students’ fear and recommended messages developed students' ability for resisting against drugs. Before intervention 5-6 students who were known as a favourite and leader of students, were selected by student’s opinion in each class as students' leaders. The each leader of the group had a coordinator and mediate role between his group and health educators. Henceforth a favourite teacher was chosen by students’ vote for helping health educators and participated in the educational intervention program.Results: The result showed that educational manipulation had significant effect on intervention group’s average response for intention (t= -4.03, p<0.000 and attitude against drug abuse (t= -6.19, p<0.000, peer resistance skills (t=-0.82, p<0.000, and knowledge (t= -10.88, p<0.000. In addition, it was not found positive urinary rapid immune-chromatography test for opium and marijuana in the intervention group whereas 6.3% in the control groups.Conclusion: This findings suggest that applying fear appeals theories and effective health risk message would be an efficient tool for preventing drug abuse education programs but further studies are needed to define function of EPPM as a effective model for creating social inoculation against drug abuse among non- drug expose adolescents. 20. Rethinking Diffusion Theory in an Applied Context: Role of Environmental Values in Adoption of Home Energy Conservation Science.gov (United States) Priest, Susanna Hornig; Greenhalgh, Ted; Neill, Helen R.; Young, Gabriel Reuben 2015-01-01 Diffusion theory, developed and popularized within communication research by Everett Rogers, is a venerable approach with much to recommend it as a theoretical foundation for applied communication research. In developing an applied project for a home energy conservation (energy efficiency retrofit) program in the state of Nevada, we utilized key… 1. Identification of the chemical inventory of different paint types applied in nuclear facilities International Nuclear Information System (INIS) The floors, concrete walls and many of the metal surfaces in nuclear power plant containments are coated with zinc primers or paint films to preserve the metal surfaces and simplify decontamination in the containment after the occurrence of a severe nuclear incident or accident. A chemical examination of paint films from different nuclear installations out of operation, as well as current operating ones, reveals that different types of paints are used whose composition can vary significantly. Results obtained for one type of paint at a certain nuclear site are in most cases unlikely to be comparable with sites painted with another type of paint. During normal operation and particularly during nuclear accidents, the paints will degrade under the high temperature, steam and irradiation influence. As paint and its degradation products can act as sources and depots for volatile iodine compounds, the type and aging conditions of the paint films will have a significant impact on the source term of the volatile fission product iodine. Thus, great care should be taken when extrapolating any results obtained for the interaction of radioactive iodine with one paint product to a different paint product. The main focus of the study is a comparison of the chemical profile of paint films applied in Swedish nuclear power plants. Teknopox Aqua V A, an epoxy paint recently used at Ringhals 2, and an emulsion paint used in the scrubber buildings of Ringhals 1-4 are compared with a paint film from Barsebaeck nuclear power plant unit 1 that had been aged under real reactor conditions for 20 years. In addition, two paint films, an emulsion and a gloss paint, used in an international nuclear fuel reprocessing facility, are compared with the paints from the Swedish nuclear power plants. (author) 2. Resampling method for applying density-dependent habitat selection theory to wildlife surveys. Directory of Open Access Journals (Sweden) Olivia Tardy Full Text Available Isodar theory can be used to evaluate fitness consequences of density-dependent habitat selection by animals. A typical habitat isodar is a regression curve plotting competitor densities in two adjacent habitats when individual fitness is equal. Despite the increasing use of habitat isodars, their application remains largely limited to areas composed of pairs of adjacent habitats that are defined a priori. We developed a resampling method that uses data from wildlife surveys to build isodars in heterogeneous landscapes without having to predefine habitat types. The method consists in randomly placing blocks over the survey area and dividing those blocks in two adjacent sub-blocks of the same size. Animal abundance is then estimated within the two sub-blocks. This process is done 100 times. Different functional forms of isodars can be investigated by relating animal abundance and differences in habitat features between sub-blocks. We applied this method to abundance data of raccoons and striped skunks, two of the main hosts of rabies virus in North America. Habitat selection by raccoons and striped skunks depended on both conspecific abundance and the difference in landscape composition and structure between sub-blocks. When conspecific abundance was low, raccoons and striped skunks favored areas with relatively high proportions of forests and anthropogenic features, respectively. Under high conspecific abundance, however, both species preferred areas with rather large corn-forest edge densities and corn field proportions. Based on random sampling techniques, we provide a robust method that is applicable to a broad range of species, including medium- to large-sized mammals with high mobility. The method is sufficiently flexible to incorporate multiple environmental covariates that can reflect key requirements of the focal species. We thus illustrate how isodar theory can be used with wildlife surveys to assess density-dependent habitat selection 3. Resampling method for applying density-dependent habitat selection theory to wildlife surveys. Science.gov (United States) Tardy, Olivia; Massé, Ariane; Pelletier, Fanie; Fortin, Daniel 2015-01-01 Isodar theory can be used to evaluate fitness consequences of density-dependent habitat selection by animals. A typical habitat isodar is a regression curve plotting competitor densities in two adjacent habitats when individual fitness is equal. Despite the increasing use of habitat isodars, their application remains largely limited to areas composed of pairs of adjacent habitats that are defined a priori. We developed a resampling method that uses data from wildlife surveys to build isodars in heterogeneous landscapes without having to predefine habitat types. The method consists in randomly placing blocks over the survey area and dividing those blocks in two adjacent sub-blocks of the same size. Animal abundance is then estimated within the two sub-blocks. This process is done 100 times. Different functional forms of isodars can be investigated by relating animal abundance and differences in habitat features between sub-blocks. We applied this method to abundance data of raccoons and striped skunks, two of the main hosts of rabies virus in North America. Habitat selection by raccoons and striped skunks depended on both conspecific abundance and the difference in landscape composition and structure between sub-blocks. When conspecific abundance was low, raccoons and striped skunks favored areas with relatively high proportions of forests and anthropogenic features, respectively. Under high conspecific abundance, however, both species preferred areas with rather large corn-forest edge densities and corn field proportions. Based on random sampling techniques, we provide a robust method that is applicable to a broad range of species, including medium- to large-sized mammals with high mobility. The method is sufficiently flexible to incorporate multiple environmental covariates that can reflect key requirements of the focal species. We thus illustrate how isodar theory can be used with wildlife surveys to assess density-dependent habitat selection over large 4. Density Functional Theory with Modified Dispersion Correction for Metals Applied to Self-Assembled Monolayers of Thiols on Au(111 Directory of Open Access Journals (Sweden) M. P. Andersson 2013-01-01 Full Text Available Using sound physical principles we modify the DFT-D2 atom pairwise semiempirical dispersion correction to density functional theory to work for metallic systems and in particular self-assembled monolayers of thiols on gold surfaces. We test our approximation for two functionals PBE-D and revPBE-D for lattice parameters and cohesive energies for Ni, Pd, Pt, Cu, Ag, and Au, adsorption energies of CO on (111 surfaces of Pd, Pt, Cu, Ag, and Au, and adsorption energy of benzene on Ag(111 and Au(111. Agreement with experimental data is substantially improved. We apply the method to self-assembled monolayers of alkanethiols on Au(111 and find reasonable agreement for PBE-D and revPBE-D for both physisorption of n-alkanethiols as well as dissociative chemisorption of dimethyl disulfide as an Au-adatom-dithiolate complex. By modifying the C6 coefficient for Au, we obtain quantitative agreement for physisorption and chemisorption for both PBE-D and revPBE-D using the same set of parameters. Our results confirm that inclusion of dispersion forces is crucial for any quantitative analysis of the thiol and thiolate bonds to the gold surface using quantum chemical calculations. 5. Nobel Prize 1992: Rudolph A. Marcus: theory of electron transfer reactions in chemical systems International Nuclear Information System (INIS) A review of the theory developed by Rudolph A. Marcus is presented, who for his rating to the theory of electron transfer in chemical systems was awarded the Nobel Prize in Chemistry in 1992. Marcus theory has constituted not only a good extension of the use of a spectroscopic principle, but also has provided an energy balance and the application of energy conservation for electron transfer reactions. A better understanding of the reaction coordinate is exposed in terms energetic and establishing the principles that govern the transfer of electrons, protons and some labile small molecular groups as studied at present. Also, the postulates and equations described have established predictive models of reaction time, very useful for industrial environments, biological, metabolic, and others that involve redox processes. Marcus theory itself has also constituted a large contribution to the theory of complex transition 6. Applying Chemical Imaging Analysis to Improve Our Understanding of Cold Cloud Formation Science.gov (United States) Laskin, A.; Knopf, D. A.; Wang, B.; Alpert, P. A.; Roedel, T.; Gilles, M. K.; Moffet, R.; Tivanski, A. 2012-12-01 The impact that atmospheric ice nucleation has on the global radiation budget is one of the least understood problems in atmospheric sciences. This is in part due to the incomplete understanding of various ice nucleation pathways that lead to ice crystal formation from pre-existing aerosol particles. Studies investigating the ice nucleation propensity of laboratory generated particles indicate that individual particle types are highly selective in their ice nucleating efficiency. This description of heterogeneous ice nucleation would present a challenge when applying to the atmosphere which contains a complex mixture of particles. Here, we employ a combination of micro-spectroscopic and optical single particle analytical methods to relate particle physical and chemical properties with observed water uptake and ice nucleation. Field-collected particles from urban environments impacted by anthropogenic and marine emissions and aging processes are investigated. Single particle characterization is provided by computer controlled scanning electron microscopy with energy dispersive analysis of X-rays (CCSEM/EDX) and scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS). A particle-on-substrate approach coupled to a vapor controlled cooling-stage and a microscope system is applied to determine the onsets of water uptake and ice nucleation including immersion freezing and deposition ice nucleation as a function of temperature (T) as low as 200 K and relative humidity (RH) up to water saturation. We observe for urban aerosol particles that for T > 230 K the oxidation level affects initial water uptake and that subsequent immersion freezing depends on particle mixing state, e.g. by the presence of insoluble particles. For T air parcel. 7. Applying Ecodevelopmental Theory and the Theory of Reasoned Action to Understand HIV Risk Behaviors Among Hispanic Adolescents OpenAIRE Ortega, Johis; Huang, Shi; Prado, Guillermo 2012-01-01 HIV/AIDS is listed as one of the top 10 reasons for the death of Hispanics between the ages of 15 and 54 in the United States. This cross sectional, descriptive secondary study proposed that using both the systemic (ecodevelopmental) and the individually focused (theory of reasoned action) theories together would lead to an increased understanding of the risk and protective factors that influence HIV risk behaviors in this population. The sample consisted of 493 Hispanic adolescent 7th and 8t... 8. Laboratory study to compare the effectiveness of chemical dispersants when applied dilute versus neat Energy Technology Data Exchange (ETDEWEB) Belore, R.; Ross, S. [S.L. Ross Environmental Research Ltd., Ottawa, ON (Canada) 2000-07-01 This study was aimed at comparing the effectiveness of chemical dispersants in neat and dilute form. Two dispersants were selected for this study: Corexit 9500 and Corexit 9527 on Alaska North Slope crude oil. Tests were conducted in the laboratory where the dispersants were applied neat and diluted with salt water. When diluted with salt water in a ratio 1:10, Corexit 9527 did not show a reduction in its effectiveness when used on Alaska North Slope (ANS) crude oil. Corexit 9500, on the other hand, saw its effectiveness on ANS crude oil drastically reduced when diluted with salt water at a ratio 1:10 and 3:10. Since these results are preliminary, the use of diluted Corexit 9500 with salt water in high capacity fire-monitor systems must be carefully considered. Reduced effectiveness of Corexit 9500 could be avoided by using a single-nozzle application in neat form. Further testing was recommended to determine the cause of the reduced efficiency. Some factors to be considered could be the type of oil, method of mixing or delivery of the dispersant, or the contact time between the dispersant and the water carrier. 12 refs., 8 tabs., 5 figs., 1 append. 9. The Eyring-Stover theory of survival applied to life-span radiation effects studies in animals International Nuclear Information System (INIS) The Eyring-Stover theory of survival describes the observed biological phenomena of damage and repair as steady-state processes that can be expressed in the formalism of absolute reaction rate theory. The steady-state formulation, rather than that of dynamic equilibrium, is invoked since biological phenomena, in contrast with most chemical and physical phenemena, are time irreversible. The theory is appropriate for calculating life shortening that results from environmental factors such as irradiation since it does not require universality and intrinsicality as to some theories of aging. The theory gives not only midrange mortality rate values but also end-range values, which are difficult to predict empirically. The previously calculated life shortening of mice after external x-irradiation and of beagles after internal irradiation from 239Pu or 226Ra is reviewed; life shortening at low dose levels of 226Ra is presented. 21 refs., 1 tab 10. H∞ Control Theory Applied to Xenon Control for Load-Following Operation of a Nuclear Reactor International Nuclear Information System (INIS) A robust controller is designed by applying the H∞ optimal control theory to the xenon control for the load-following operation of a nuclear reactor. The set of reactor model equations for controller design is a stiff system. This singularly perturbed system arises from the interaction of slow dynamics modes (iodine and xenon concentrations) and fast dynamics modes (neutron density, fuel and coolant temperatures). The singular perturbation technique is used to overcome this stiffness problem. The design specifications are incorporated by the frequency weights using the mixed-sensitivity problem approach. The robustness of H∞ control is demonstrated by comparing it with linear quadratic Gaussian (LQG) control in the case of a measurement delay of the power measurement system.Since the gains and phase margins of H∞ control are larger than those of LQG control, the H∞ control is expected to provide excellent stability robustness and performance robustness against external disturbances and noises, model parameter variations, and modeling errors as well as hardware failures. It may also provide a practical design method because the design specifications can be easily implemented by the frequency weights 11. Applying cognitive load theory to the redesign of a conventional database systems course Science.gov (United States) Mason, Raina; Seton, Carolyn; Cooper, Graham 2016-01-01 Cognitive load theory (CLT) was used to redesign a Database Systems course for Information Technology students. The redesign was intended to address poor student performance and low satisfaction, and to provide a more relevant foundation in database design and use for subsequent studies and industry. The original course followed the conventional structure for a database course, covering database design first, then database development. Analysis showed the conventional course content was appropriate but the instructional materials used were too complex, especially for novice students. The redesign of instructional materials applied CLT to remove split attention and redundancy effects, to provide suitable worked examples and sub-goals, and included an extensive re-sequencing of content. The approach was primarily directed towards mid- to lower performing students and results showed a significant improvement for this cohort with the exam failure rate reducing by 34% after the redesign on identical final exams. Student satisfaction also increased and feedback from subsequent study was very positive. The application of CLT to the design of instructional materials is discussed for delivery of technical courses. 12. Textures of Superfluid 3He-B in Applied Flow and Comparison with Hydrostatic Theory CERN Document Server de Graaf, R; Hosio, J J; Heikkinen, P J; Krusius, M 2011-01-01 Measurements of the order parameter texture of rotating superfluid 3He-B have been performed as a function of the applied azimuthal counterflow velocity down to temperatures of 0.2Tc. The results are compared to the hydrostatic theory of 3He-B. Good agreement is found at all measured temperatures and rotation velocities when the flow anisotropy contribution to the textural free energy is adjusted. This gives a superfluid energy gap Delta(T) which agrees with that measured by Todoshchenko et al., with Delta(0)=1.97kBTc at 29.0 bar. The B-phase susceptibility, longitudinal resonance frequency, and textural phase transition have been extracted from the measurements as a function of temperature and azimuthal counterflow velocity. Owing to decreasing absorption intensities the present measuring method, based on the line shape analysis of the NMR spectrum, loses its sensitivity with decreasing temperature. However, we find that in practice the measurement of vortex numbers and counterflow velocities is still feasib... 13. Effectiveness of Anabolic Steroid Preventative Intervention among Gym Users: Applying Theory of Planned Behavior Directory of Open Access Journals (Sweden) Abbas Moghimbeigi 2011-07-01 Full Text Available Background: Use of anabolic androgenic steroids (AAS has been associated with adversephysical and psychiatric effects and it is known as rising problem among youth people. Thisstudy was conducted to evaluate anabolic steroids preventative intervention efficiency amonggym users in Iran and theory of planned behaviour was applied as theoretical framework.Methods: Overall, 120 male gym users participated in this study as intervention and controlgroup. This was a longitudinal randomized pretest - posttest series control group design panelstudy to implement a behaviour modification based intervention to prevent AAS use. Cross -tabulation and t-test by using SPSS statistical package, version 13 was used for the statisticalanalysis.Results: It was found significant improvements in average response for knowledge about sideeffects of AAS (P<0.001, attitude toward, and intention not to use AAS. Additionally afterintervention, the rate of AAS and supplements use was decreased among intervention group.Conclusion: Comprehensive implementation against AAS abuse among gym users and adolescenceswould be effective to improve adolescents’ healthy behaviors and intend them notto use AAS. 14. Adoption of M-commerce in India: Applying Theory of Planned Behaviour Model Directory of Open Access Journals (Sweden) SITA MISHRA 2014-05-01 Full Text Available Today, with the development in wireless and mobile technologies, Mobile Commerce (m-commerce is expected to make substantial impact on the business landscape. The mobile cellular market is the fastest growing telecommunication market in terms of subscriber numbers and popularity in India. Mobile Commerce market in India is expected to grow at a CAGR of 71.06 percent by the year 2016. The substantial increase of the mobile users is linked with greater adoption for mobile-commerce in India. At present, Indian users indulge in mobile purchases for low value transactions such as entertainment services, games, and music downloads. Mobile commerce is quite popular in the developed countries but in India it is in nascent stage and yet to take off. This study captures users’ acceptance behaviour towards M-commerce by applying theory of planned behaviour (TPB model developed by Ajzen (1991. Results indicate that attitude and perceived behavioural control have positive and significant impact on individual’s intention while subjective norm has a positive but not significant impact on intention. Further, intention is found to be significantly and positively related with behaviour. 15. Multivariable control theory applied to hierarchial attitude control for planetary spacecraft Science.gov (United States) Boland, J. S., III; Russell, D. W. 1972-01-01 Multivariable control theory is applied to the design of a hierarchial attitude control system for the CARD space vehicle. The system selected uses reaction control jets (RCJ) and control moment gyros (CMG). The RCJ system uses linear signal mixing and a no-fire region similar to that used on the Skylab program; the y-axis and z-axis systems which are coupled use a sum and difference feedback scheme. The CMG system uses the optimum steering law and the same feedback signals as the RCJ system. When both systems are active the design is such that the torques from each system are never in opposition. A state-space analysis was made of the CMG system to determine the general structure of the input matrices (steering law) and feedback matrices that will decouple the axes. It is shown that the optimum steering law and proportional-plus-rate feedback are special cases. A derivation of the disturbing torques on the space vehicle due to the motion of the on-board television camera is presented. A procedure for computing an upper bound on these torques (given the system parameters) is included. 16. Calculation of liquid-liquid equilibrium of aqueous two-phase systems using a chemical-theory-based excess Gibbs energy model Directory of Open Access Journals (Sweden) Pessôa Filho P. A. 2004-01-01 Full Text Available Mixtures containing compounds that undergo hydrogen bonding show large deviations from ideal behavior. These deviations can be accounted for through chemical theory, according to which the formation of a hydrogen bond can be treated as a chemical reaction. This chemical equilibrium needs to be taken into account when applying stability criteria and carrying out phase equilibrium calculations. In this work, we illustrate the application of the stability criteria to establish the conditions under which a liquid-phase split may occur and the subsequent calculation of liquid-liquid equilibrium using a chemical-theory-modified Flory-Huggins equation to describe the non ideality of aqueous two-phase systems composed of poly(ethylene glycol and dextran. The model was found to be able to correlate ternary liquid-liquid diagrams reasonably well by simple adjustment of the polymer-polymer binary interaction parameter. 17. Theory and design of broadband matching networks applied electricity and electronics CERN Document Server Chen, Wai-Kai 1976-01-01 Theory and Design of Broadband Matching Networks centers on the network theory and its applications to the design of broadband matching networks and amplifiers. Organized into five chapters, this book begins with a description of the foundation of network theory. Chapter 2 gives a fairly complete exposition of the scattering matrix associated with an n-port network. Chapter 3 considers the approximation problem along with a discussion of the approximating functions. Chapter 4 explains the Youla's theory of broadband matching by illustrating every phase of the theory with fully worked out examp 18. Power optimization of chemically driven heat engine based on first and second order reaction kinetic theory and probability theory Science.gov (United States) Zhang, Lei; Chen, Lingen; Sun, Fengrui 2016-03-01 The finite-time thermodynamic method based on probability analysis can more accurately describe various performance parameters of thermodynamic systems. Based on the relation between optimal efficiency and power output of a generalized Carnot heat engine with a finite high-temperature heat reservoir (heat source) and an infinite low-temperature heat reservoir (heat sink) and with the only irreversibility of heat transfer, this paper studies the problem of power optimization of chemically driven heat engine based on first and second order reaction kinetic theory, puts forward a model of the coupling heat engine which can be run periodically and obtains the effects of the finite-time thermodynamic characteristics of the coupling relation between chemical reaction and heat engine on the power optimization. The results show that the first order reaction kinetics model can use fuel more effectively, and can provide heat engine with higher temperature heat source to increase the power output of the heat engine. Moreover, the power fluctuation bounds of the chemically driven heat engine are obtained by using the probability analysis method. The results may provide some guidelines for the character analysis and power optimization of the chemically driven heat engines. 19. An effective correlated mean-field theory applied in the spin-1/2 Ising ferromagnetic model Energy Technology Data Exchange (ETDEWEB) Roberto Viana, J.; Salmon, Octávio R. [Universidade Federal do Amazonas – UFAM, Manaus 69077-000, AM (Brazil); Ricardo de Sousa, J. [Universidade Federal do Amazonas – UFAM, Manaus 69077-000, AM (Brazil); National Institute of Science and Technology for Complex Systems, Universidade Federal do Amazonas, 3000, Japiim, 69077-000 Manaus, AM (Brazil); Neto, Minos A.; Padilha, Igor T. [Universidade Federal do Amazonas – UFAM, Manaus 69077-000, AM (Brazil) 2014-11-15 We developed a new treatment for mean-field theory applied in spins systems, denominated effective correlated mean-field (ECMF). We apply this theory to study the spin-1/2 Ising ferromagnetic model with nearest-neighbor interactions on a square lattice. We use clusters of finite sizes and study the criticality of the ferromagnetic system, where we obtain a convergence of critical temperature for the value k{sub B}T{sub c}/J≃2.27905±0.00141. Also the behavior of magnetic and thermodynamic properties, using the condition of minimum energy of the physical system is obtained. - Highlights: • We developed spin models to study real magnetic systems. • We study the thermodynamic and magnetic properties of the ferromagnetism. • We enhanced a mean-field theory applied in spins models. 20. An effective correlated mean-field theory applied in the spin-1/2 Ising ferromagnetic model International Nuclear Information System (INIS) We developed a new treatment for mean-field theory applied in spins systems, denominated effective correlated mean-field (ECMF). We apply this theory to study the spin-1/2 Ising ferromagnetic model with nearest-neighbor interactions on a square lattice. We use clusters of finite sizes and study the criticality of the ferromagnetic system, where we obtain a convergence of critical temperature for the value kBTc/J≃2.27905±0.00141. Also the behavior of magnetic and thermodynamic properties, using the condition of minimum energy of the physical system is obtained. - Highlights: • We developed spin models to study real magnetic systems. • We study the thermodynamic and magnetic properties of the ferromagnetism. • We enhanced a mean-field theory applied in spins models 1. Applying theory of planned behavior to predict exercise maintenance in sarcopenic elderly Directory of Open Access Journals (Sweden) Ahmad MH 2014-09-01 Full Text Available Mohamad Hasnan Ahmad,1 Suzana Shahar,2 Nur Islami Mohd Fahmi Teng,2 Zahara Abdul Manaf,2 Noor Ibrahim Mohd Sakian,3 Baharudin Omar41Centre of Nutrition Epidemiology Research, Institute of Public Health, Ministry of Health, Kuala Lumpur, Malaysia; 2Dietetics Program, 3Occupational Therapy Program, 4Department of Biomedical Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia Abstract: This study aimed to determine the factors associated with exercise behavior based on the theory of planned behavior (TPB among the sarcopenic elderly people in Cheras, Kuala ­Lumpur. A total of 65 subjects with mean ages of 67.5±5.2 (men and 66.1±5.1 (women years participated in this study. Subjects were divided into two groups: 1 exercise group (n=34; 25 men, nine women; and 2 the control group (n=31; 22 men, nine women. Structural equation modeling, based on TPB components, was applied to determine specific factors that most contribute to and predict actual behavior toward exercise. Based on the TPB’s model, attitude (ß=0.60 and perceived behavioral control (ß=0.24 were the major predictors of intention to exercise among men at the baseline. Among women, the subjective norm (ß=0.82 was the major predictor of intention to perform the exercise at the baseline. After 12 weeks, attitude (men’s, ß=0.68; women’s, ß=0.24 and subjective norm (men’s, ß=0.12; women’s, ß=0.87 were the predictors of the intention to perform the exercise. “Feels healthier with exercise” was the specific factor to improve the intention to perform and to maintain exercise behavior in men (ß=0.36 and women (ß=0.49. “Not motivated to perform exercise” was the main barrier among men’s intention to exercise. The intention to perform the exercise was able to predict actual behavior regarding exercise at the baseline and at 12 weeks of an intervention program. As a conclusion, TPB is a useful model to determine and 2. Adaptive Neuro-Fuzzy Inference System Applied QSAR with Quantum Chemical Descriptors for Predicting Radical Scavenging Activities of Carotenoids OpenAIRE Changho Jhin; Keum Taek Hwang 2015-01-01 One of the physiological characteristics of carotenoids is their radical scavenging activity. In this study, the relationship between radical scavenging activities and quantum chemical descriptors of carotenoids was determined. Adaptive neuro-fuzzy inference system (ANFIS) applied quantitative structure-activity relationship models (QSAR) were also developed for predicting and comparing radical scavenging activities of carotenoids. Semi-empirical PM6 and PM7 quantum chemical calculations were... 3. Effective Polyakov loop models for QCD-like theories at finite chemical potential CERN Document Server Scior, Philipp 2016-01-01 We study genuine finite density effects in QCD-like theories with three-dimensional Polyakov-loop effective theories for heavy quarks. These are derived from the full QCD-like theories by combined strong-coupling and hopping expansions. In particular, we investigate the cold and dense regimes of phase diagrams where we expect to find Bose-Einstein-condensation of diquark baryons or a fermionic first-order liquid-gas transition, depending on the gauge group of the theory. In two-color QCD, for example, we observe evidence of a continuous zero-temperature transition to finite diquark density when the quark chemical potential$\\mu$reaches half the diquark mass, i.e. without binding energy. In G$_2$-QCD we observe, in addition to this "Silver Blaze" onset of diquark density, a second transition in the density towards an exponential increase by roughly$3\\mu/T$corresponding to a finite density of G$_2\$-nucleons.

4. COSMO-RSC: Second-Order Quasi-Chemical Theory Recovering Local Surface Correlation Effects.

Science.gov (United States)

Klamt, A

2016-03-31

The conductor-like screening model for realistic solvation (COSMO-RS) was introduced 20 years ago and meanwhile has become an important tool for the prediction of fluid phase equilibrium properties. Starting from quantum chemical information about the surface polarity of solutes and solvents, it solves the statistical thermodynamics of molecules in liquid phases by the very efficient approximation of independently pairwise interacting surfaces, which meanwhile was shown to be equivalent to Guggenheim's quasi-chemical theory. One of the basic limitations of COSMO-RS, as of any quasi-chemical model, is the neglect of neighbor information, i.e., of local correlations of surface types on the molecular surface. In this paper we present the completely novel concept of using the first-order COSMO-RS contact probabilities for the construction of local surface correlation functions. These are fed as an entropic correction for the pair interactions into a second COSMO-RS self-consistency loop, which yields new contact probabilities, enthalpies, free energies and activity coefficients recovering much of the originally lost neighbor effects. By a novel analytic correction for concentration dependent interactions, the resulting activity coefficients remain exactly Gibbs-Duhem consistent. The theory is demonstrated on the example of a lattice Monte Carlo fluid of dimerizing pseudomolecules. In this showcase the strong deviations of the lattice Monte Carlo fluid from quasi-chemical theory are almost perfectly reproduced by COSMO-RSC. PMID:26963690

5. Applying the Theory of the Firm to Examine a Technology Startup at the Investment Stage

Directory of Open Access Journals (Sweden)

Michael Ayukawa

2012-05-01

Full Text Available The investment stage of a new technology firm is when resources, opportunities, investors, and early customers first converge. Currently, technology entrepreneurs make many expensive mistakes. They invest in assets and develop capabilities that prove to have limited value. They take too long to discover and validate the product-market fit for their firms during the investment stage and run out of time and money. Understanding how theory can help entrepreneurs make decisions during the investment stage is important to accelerate new-firm formation and growth as well as to reduce the uncertainty of founders and stakeholders of technology firms. This article introduces a model developed to examine deal making during the investment stage of a new technology firm. It is an extension of a model of lateral firm scope proposed by Oliver Hart and Bengt Holmstrom. The extensions come from considering a technology firm as being both a deal-making entity and a pool of resources during the investment stage. A deal is the result of a decision the entrepreneur and others make to coordinate (i.e., work together to achieve a common objective. Benefits from a deal include cash profits for the firm and private benefits for the entrepreneur. This extended model is then applied to examine the author’s firm which is still in the investment stage. Application of the extended model to a real-life situation generated two important insights: i when private benefits include learning from experimentation, the number of deals increases and ii at the start of the investment stage, private benefits drive deal-making, whereas at the end of the investment stage, cash profits derived from asset ownership drive deal-making.

6. Applying theory of planned behavior to predict exercise maintenance in sarcopenic elderly.

Science.gov (United States)

Ahmad, Mohamad Hasnan; Shahar, Suzana; Teng, Nur Islami Mohd Fahmi; Manaf, Zahara Abdul; Sakian, Noor Ibrahim Mohd; Omar, Baharudin

2014-01-01

This study aimed to determine the factors associated with exercise behavior based on the theory of planned behavior (TPB) among the sarcopenic elderly people in Cheras, Kuala Lumpur. A total of 65 subjects with mean ages of 67.5±5.2 (men) and 66.1±5.1 (women) years participated in this study. Subjects were divided into two groups: 1) exercise group (n=34; 25 men, nine women); and 2) the control group (n=31; 22 men, nine women). Structural equation modeling, based on TPB components, was applied to determine specific factors that most contribute to and predict actual behavior toward exercise. Based on the TPB's model, attitude (β=0.60) and perceived behavioral control (β=0.24) were the major predictors of intention to exercise among men at the baseline. Among women, the subjective norm (β=0.82) was the major predictor of intention to perform the exercise at the baseline. After 12 weeks, attitude (men's, β=0.68; women's, β=0.24) and subjective norm (men's, β=0.12; women's, β=0.87) were the predictors of the intention to perform the exercise. "Feels healthier with exercise" was the specific factor to improve the intention to perform and to maintain exercise behavior in men (β=0.36) and women (β=0.49). "Not motivated to perform exercise" was the main barrier among men's intention to exercise. The intention to perform the exercise was able to predict actual behavior regarding exercise at the baseline and at 12 weeks of an intervention program. As a conclusion, TPB is a useful model to determine and to predict maintenance of exercise in the sarcopenic elderly. PMID:25258524

7. Applying Portfolio Theory to EU Electricity Planning and Policy-Making

Energy Technology Data Exchange (ETDEWEB)

Awerbuch, Shimon; Berger, Martin

2003-02-01

This study introduces mean-variance portfolio theory and evaluates its potential application to the development of efficient (optimal) European Union (EU-15) generating portfolios that enhance energy security and diversification objectives. The analysis extends to European countries the previous work done by Awerbuch in the US, and applies a significantly more detailed portfolio model that reflects the risk of the relevant generating cost streams: fuel, operation and maintenance and construction period costs. It illustrates the portfolio effects of different generating mixes. The study offers preliminary findings on the effects of including more renewable energy sources in the typical EU portfolio mix and suggests interesting directions for further study. The study arises from the perception that these standard, finance-oriented analyses may offer valuable enhancements to energy planning, and concepts of energy security and diversity. Clearly the combination of better portfolio construction and more accurate pricing should lead to more optimal decisions in the round. This study, therefore, represents an effort to complement traditional approaches and point researchers and planners into new territory. The results generally indicate that the existing and projected EU generating mixes are sub optimal - though slightly - from a risk-return perspective, which implies that feasible portfolios with lower cost and risk exist. These can be developed by adjusting the conventional mix and by including larger shares of wind or similar renewable technologies. The results of the portfolio analysis suggest that fixed cost technologies such as renewables must be a part of any efficient generating portfolio. Our assessment of all technologies is limited to risk and cost measures, although other benefits, including low externality costs and sustainability, are often cited for renewables.

8. Applying the Theory of Planned Behavior in Predicting Proenvironmental Behaviour: The Case of Energy Conservation

OpenAIRE

Octav-Ionuţ Macovei

2015-01-01

This paper aims to propose and validate a model based on the Theory of Planned Behavior in order to explain consumers’ pro-environmental behaviour regarding energy conservation. The model was constructed using the five variables from Ajzen’s Theory of Planned Behavior (TPB) (behaviour, intention, perceived behavioural control, subjective norms and attitude) to which a variable adapted from Schwartz’s Norm Activation Theory (NAT) was added (“awareness of the consequences and the need”) in orde...

9. An empirical test of the Theory of Planned Behaviour applied to contraceptive use in rural Uganda.

Science.gov (United States)

Kiene, Susan M; Hopwood, Sarah; Lule, Haruna; Wanyenze, Rhoda K

2014-12-01

There is a high unmet need for contraceptives in developing countries such as Uganda, with high population growth, where efforts are needed to promote family planning and contraceptive use. Despite this high need, little research has investigated applications of health-behaviour-change theories to contraceptive use among this population. This study tested the Theory of Planned Behaviour's ability to predict contraceptive-use-related behaviours among post-partum women in rural Uganda. Results gave modest support to the theory's application and suggest an urgent need for improved theory-based interventions to promote contraceptive use in the populations of developing countries. PMID:23928989

10. Predicting the Future: Opportunities and Challenges for the Chemical Industry to Apply 21st-Century Toxicity Testing

OpenAIRE

Settivari, Raja S; Ball, Nicholas; Murphy, Lynea; Rasoulpour, Reza; Boverhof, Darrell R; Carney, Edward W

2015-01-01

Interest in applying 21st-century toxicity testing tools for safety assessment of industrial chemicals is growing. Whereas conventional toxicology uses mainly animal-based, descriptive methods, a paradigm shift is emerging in which computational approaches, systems biology, high-throughput in vitro toxicity assays, and high-throughput exposure assessments are beginning to be applied to mechanism-based risk assessments in a time- and resource-efficient fashion. Here we describe recent advances...