WorldWideScience

Sample records for symbolic computation

  1. Optical Symbolic Computing

    Science.gov (United States)

    Neff, John A.

    1989-12-01

    Experiments originating from Gestalt psychology have shown that representing information in a symbolic form provides a more effective means to understanding. Computer scientists have been struggling for the last two decades to determine how best to create, manipulate, and store collections of symbolic structures. In the past, much of this struggling led to software innovations because that was the path of least resistance. For example, the development of heuristics for organizing the searching through knowledge bases was much less expensive than building massively parallel machines that could search in parallel. That is now beginning to change with the emergence of parallel architectures which are showing the potential for handling symbolic structures. This paper will review the relationships between symbolic computing and parallel computing architectures, and will identify opportunities for optics to significantly impact the performance of such computing machines. Although neural networks are an exciting subset of massively parallel computing structures, this paper will not touch on this area since it is receiving a great deal of attention in the literature. That is, the concepts presented herein do not consider the distributed representation of knowledge.

  2. Symbolic functions from neural computation.

    Science.gov (United States)

    Smolensky, Paul

    2012-07-28

    Is thought computation over ideas? Turing, and many cognitive scientists since, have assumed so, and formulated computational systems in which meaningful concepts are encoded by symbols which are the objects of computation. Cognition has been carved into parts, each a function defined over such symbols. This paper reports on a research program aimed at computing these symbolic functions without computing over the symbols. Symbols are encoded as patterns of numerical activation over multiple abstract neurons, each neuron simultaneously contributing to the encoding of multiple symbols. Computation is carried out over the numerical activation values of such neurons, which individually have no conceptual meaning. This is massively parallel numerical computation operating within a continuous computational medium. The paper presents an axiomatic framework for such a computational account of cognition, including a number of formal results. Within the framework, a class of recursive symbolic functions can be computed. Formal languages defined by symbolic rewrite rules can also be specified, the subsymbolic computations producing symbolic outputs that simultaneously display central properties of both facets of human language: universal symbolic grammatical competence and statistical, imperfect performance.

  3. Numerical and symbolic scientific computing

    CERN Document Server

    Langer, Ulrich

    2011-01-01

    The book presents the state of the art and results and also includes articles pointing to future developments. Most of the articles center around the theme of linear partial differential equations. Major aspects are fast solvers in elastoplasticity, symbolic analysis for boundary problems, symbolic treatment of operators, computer algebra, and finite element methods, a symbolic approach to finite difference schemes, cylindrical algebraic decomposition and local Fourier analysis, and white noise analysis for stochastic partial differential equations. Further numerical-symbolic topics range from

  4. Applications of symbolic algebraic computation

    International Nuclear Information System (INIS)

    Brown, W.S.; Hearn, A.C.

    1979-01-01

    This paper is a survey of applications of systems for symbomic algebraic computation. In most successful applications, calculations that can be taken to a given order by hand are then extended one or two more orders by computer. Furthermore, with a few notable exceptins, these applications also involve numerical computation in some way. Therefore the authors emphasize the interface between symbolic and numerical computation, including: 1. Computations with both symbolic and numerical phases. 2. Data involving both the unpredictible size and shape that typify symbolic computation and the (usually inexact) numerical values that characterize numerical computation. 3. Applications of one field to the other. It is concluded that the fields of symbolic and numerical computation can advance most fruitfully in harmony rather than in competition. (Auth.)

  5. Scientific applications of symbolic computation

    International Nuclear Information System (INIS)

    Hearn, A.C.

    1976-02-01

    The use of symbolic computation systems for problem solving in scientific research is reviewed. The nature of the field is described, and particular examples are considered from celestial mechanics, quantum electrodynamics and general relativity. Symbolic integration and some more recent applications of algebra systems are also discussed [fr

  6. Exact computation of the 9-j symbols

    International Nuclear Information System (INIS)

    Lai Shantao; Chiu Jingnan

    1992-01-01

    A useful algebraic formula for the 9-j symbol has been rewritten for convenient use on a computer. A simple FORTRAN program for the exact computation of 9-j symbols has been written for the VAX with VMS version V5,4-1 according to this formula. The results agree with the approximate values in existing literature. Some specific values of 9-j symbols needed for the intensity and alignments of three-photon nonresonant transitions are tabulated. Approximate 9-j symbol values beyond the limitation of the computer can also be computed by this program. The computer code of the exact computation of 3-j, 6-j and 9-j symbols are available through electronic mail upon request. (orig.)

  7. Symbolic math for computation of radiation shielding

    International Nuclear Information System (INIS)

    Suman, Vitisha; Datta, D.; Sarkar, P.K.; Kushwaha, H.S.

    2010-01-01

    Radiation transport calculations for shielding studies in the field of accelerator technology often involve intensive numerical computations. Traditionally, radiation transport equation is solved using finite difference scheme or advanced finite element method with respect to specific initial and boundary conditions suitable for the geometry of the problem. All these computations need CPU intensive computer codes for accurate calculation of scalar and angular fluxes. Computation using symbols of the analytical expression representing the transport equation as objects is an enhanced numerical technique in which the computation is completely algorithm and data oriented. Algorithm on the basis of symbolic math architecture is developed using Symbolic math toolbox of MATLAB software. Present paper describes the symbolic math algorithm and its application as a case study in which shielding calculation of rectangular slab geometry is studied for a line source of specific activity. Study of application of symbolic math in this domain evolves a new paradigm compared to the existing computer code such as DORT. (author)

  8. Second International workshop Geometry and Symbolic Computation

    CERN Document Server

    Walczak, Paweł; Geometry and its Applications

    2014-01-01

    This volume has been divided into two parts: Geometry and Applications. The geometry portion of the book relates primarily to geometric flows, laminations, integral formulae, geometry of vector fields on Lie groups, and osculation; the articles in the applications portion concern some particular problems of the theory of dynamical systems, including mathematical problems of liquid flows and a study of cycles for non-dynamical systems. This Work is based on the second international workshop entitled "Geometry and Symbolic Computations," held on May 15-18, 2013 at the University of Haifa and is dedicated to modeling (using symbolic calculations) in differential geometry and its applications in fields such as computer science, tomography, and mechanics. It is intended to create a forum for students and researchers in pure and applied geometry to promote discussion of modern state-of-the-art in geometric modeling using symbolic programs such as Maple™ and Mathematica®, as well as presentation of new results. ...

  9. Symbolic Substitution Methods For Optical Computing

    Science.gov (United States)

    Murdocca, M. J.; Huang, A.

    1989-02-01

    Symbolic substitution is a method of computing based on parallel binary pattern replacement, that can be implemented with simple optical components and regular free-space interconnection schemes. A two-dimensional pattern is searched for in parallel in an array and is replaced with another pattern. Pattern transformation rules can be applied sequentially or in parallel to realize complex functions. When the substitution space is modified to be loge SIT connected for N binary spots, and masks are allowed to customize the system, then optical digital circuits using symbolic substitution for network interconnects can be made nearly as efficient in terms of gate count and circuit depth as conventional arbitrary interconnection schemes allow. We describe an optical setup that requires no more than a fanin and fanout of two using optically nonlinear logic devices and a free space interconnection scheme based on symbolic substitution.

  10. Symbolic Computing in Probabilistic and Stochastic Analysis

    Directory of Open Access Journals (Sweden)

    Kamiński Marcin

    2015-12-01

    Full Text Available The main aim is to present recent developments in applications of symbolic computing in probabilistic and stochastic analysis, and this is done using the example of the well-known MAPLE system. The key theoretical methods discussed are (i analytical derivations, (ii the classical Monte-Carlo simulation approach, (iii the stochastic perturbation technique, as well as (iv some semi-analytical approaches. It is demonstrated in particular how to engage the basic symbolic tools implemented in any system to derive the basic equations for the stochastic perturbation technique and how to make an efficient implementation of the semi-analytical methods using an automatic differentiation and integration provided by the computer algebra program itself. The second important illustration is probabilistic extension of the finite element and finite difference methods coded in MAPLE, showing how to solve boundary value problems with random parameters in the environment of symbolic computing. The response function method belongs to the third group, where interference of classical deterministic software with the non-linear fitting numerical techniques available in various symbolic environments is displayed. We recover in this context the probabilistic structural response in engineering systems and show how to solve partial differential equations including Gaussian randomness in their coefficients.

  11. Symbolic Computation Using Cellular Automata-Based Hyperdimensional Computing.

    Science.gov (United States)

    Yilmaz, Ozgur

    2015-12-01

    This letter introduces a novel framework of reservoir computing that is capable of both connectionist machine intelligence and symbolic computation. A cellular automaton is used as the reservoir of dynamical systems. Input is randomly projected onto the initial conditions of automaton cells, and nonlinear computation is performed on the input via application of a rule in the automaton for a period of time. The evolution of the automaton creates a space-time volume of the automaton state space, and it is used as the reservoir. The proposed framework is shown to be capable of long-term memory, and it requires orders of magnitude less computation compared to echo state networks. As the focus of the letter, we suggest that binary reservoir feature vectors can be combined using Boolean operations as in hyperdimensional computing, paving a direct way for concept building and symbolic processing. To demonstrate the capability of the proposed system, we make analogies directly on image data by asking, What is the automobile of air?

  12. The Interpretation of Symbol Schemes in a Computational Medium.

    Science.gov (United States)

    Ford, Michael; Frederickson, Ann; Martin, Lori

    This study investigated the variation of meaning that may be assigned by students to instructional symbol systems. Toward this end, student interpretations of symbols employed to represent free fall in Boxer, a computational environment designed for innovative instructional activities in math and science, were analyzed. Four classes of…

  13. Exact computation of the 3-j and 6-j symbols

    International Nuclear Information System (INIS)

    Lai Shantao; Chiu Yingnan

    1990-01-01

    A simple FORTRAN program for the exaxt computation of 3-j and 6-j symbols has been written for the VAX with VMS version v5.1 in our university's computing center. It goes beyond and contains all of the 3-j and 6-j symbols evaluated in the book by M. Rotenberg, R. Bivins, N. Metropolis and J.K. Wooten Jr. The 3-j symbols up to (30/m 1 30/m 2 30/m 3 ) and 6-j symbols up to {20/20 20/20 20/20} can be computed exactly by this program. Approximate values for larger j's up to (200/m 1 200/m 2 200/m 3 ) and {200/200 200/200 200/220} can also be computed by this program. (orig.)

  14. Symbolic computation of nonlinear wave interactions on MACSYMA

    International Nuclear Information System (INIS)

    Bers, A.; Kulp, J.L.; Karney, C.F.F.

    1976-01-01

    In this paper the use of a large symbolic computation system - MACSYMA - in determining approximate analytic expressions for the nonlinear coupling of waves in an anisotropic plasma is described. MACSYMA was used to implement the solutions of a fluid plasma model nonlinear partial differential equations by perturbation expansions and subsequent iterative analytic computations. By interacting with the details of the symbolic computation, the physical processes responsible for particular nonlinear wave interactions could be uncovered and appropriate approximations introduced so as to simplify the final analytic result. Details of the MACSYMA system and its use are discussed and illustrated. (Auth.)

  15. Symbolic computation and abundant travelling wave solutions to ...

    Indian Academy of Sciences (India)

    2016-12-09

    Dec 9, 2016 ... 3Centre for Undergraduate Studies, University of Punjab, Lahore 54590, Pakistan. 4Mathematics-Computer Department, Art-Science Faculty, Eskisehir Osmangazi University, 26480, .... the overdetermined set of algebraic equations by using the symbolic computation software, such as, Maple, we obtain.

  16. Symbolic computation and abundant travelling wave solutions to ...

    Indian Academy of Sciences (India)

    2016-12-09

    Dec 9, 2016 ... Abstract. In this article, the novel (G /G)-expansion method is successfully applied to construct the abundant travelling wave solutions to the KdV–mKdV equation with the aid of symbolic computation. This equation is one of the most popular equation in soliton physics and appear in many practical scenarios ...

  17. Symbolic Computation, Number Theory, Special Functions, Physics and Combinatorics

    CERN Document Server

    Ismail, Mourad

    2001-01-01

    These are the proceedings of the conference "Symbolic Computation, Number Theory, Special Functions, Physics and Combinatorics" held at the Department of Mathematics, University of Florida, Gainesville, from November 11 to 13, 1999. The main emphasis of the conference was Com­ puter Algebra (i. e. symbolic computation) and how it related to the fields of Number Theory, Special Functions, Physics and Combinatorics. A subject that is common to all of these fields is q-series. We brought together those who do symbolic computation with q-series and those who need q-series in­ cluding workers in Physics and Combinatorics. The goal of the conference was to inform mathematicians and physicists who use q-series of the latest developments in the field of q-series and especially how symbolic computa­ tion has aided these developments. Over 60 people were invited to participate in the conference. We ended up having 45 participants at the conference, including six one hour plenary speakers and 28 half hour speakers. T...

  18. Signal- and Symbol-based Representations in Computer Vision

    DEFF Research Database (Denmark)

    Krüger, Norbert; Felsberg, Michael

    We discuss problems of signal-- and symbol based representations in terms of three dilemmas which are faced in the design of each vision system. Signal- and symbol-based representations are opposite ends of a spectrum of conceivable design decisions caught at opposite sides of the dilemmas. We make...

  19. Building a symbolic computer algebra toolbox to compute 2D Fourier transforms in polar coordinates.

    Science.gov (United States)

    Dovlo, Edem; Baddour, Natalie

    2015-01-01

    The development of a symbolic computer algebra toolbox for the computation of two dimensional (2D) Fourier transforms in polar coordinates is presented. Multidimensional Fourier transforms are widely used in image processing, tomographic reconstructions and in fact any application that requires a multidimensional convolution. By examining a function in the frequency domain, additional information and insights may be obtained. The advantages of our method include: •The implementation of the 2D Fourier transform in polar coordinates within the toolbox via the combination of two significantly simpler transforms.•The modular approach along with the idea of lookup tables implemented help avoid the issue of indeterminate results which may occur when attempting to directly evaluate the transform.•The concept also helps prevent unnecessary computation of already known transforms thereby saving memory and processing time.

  20. An approach to first principles electronic structure calculation by symbolic-numeric computation

    Directory of Open Access Journals (Sweden)

    Akihito Kikuchi

    2013-04-01

    Full Text Available There is a wide variety of electronic structure calculation cooperating with symbolic computation. The main purpose of the latter is to play an auxiliary role (but not without importance to the former. In the field of quantum physics [1-9], researchers sometimes have to handle complicated mathematical expressions, whose derivation seems almost beyond human power. Thus one resorts to the intensive use of computers, namely, symbolic computation [10-16]. Examples of this can be seen in various topics: atomic energy levels, molecular dynamics, molecular energy and spectra, collision and scattering, lattice spin models and so on [16]. How to obtain molecular integrals analytically or how to manipulate complex formulas in many body interactions, is one such problem. In the former, when one uses special atomic basis for a specific purpose, to express the integrals by the combination of already known analytic functions, may sometimes be very difficult. In the latter, one must rearrange a number of creation and annihilation operators in a suitable order and calculate the analytical expectation value. It is usual that a quantitative and massive computation follows a symbolic one; for the convenience of the numerical computation, it is necessary to reduce a complicated analytic expression into a tractable and computable form. This is the main motive for the introduction of the symbolic computation as a forerunner of the numerical one and their collaboration has won considerable successes. The present work should be classified as one such trial. Meanwhile, the use of symbolic computation in the present work is not limited to indirect and auxiliary part to the numerical computation. The present work can be applicable to a direct and quantitative estimation of the electronic structure, skipping conventional computational methods.

  1. Symbolic computation and abundant travelling wave solutions to ...

    Indian Academy of Sciences (India)

    ... Lahore, Pakistan; Department of Mathematics, National University of Computer and Emerging Sciences, Lahore, Pakistan; Centre for Undergraduate Studies, University of Punjab, Lahore 54590, Pakistan; Mathematics-Computer Department, Art-Science Faculty, Eskisehir Osmangazi University, 26480, Eskisehir-Turkey ...

  2. A REDUCE program for symbolic computation of Puiseux expansions

    International Nuclear Information System (INIS)

    Gerdt, V.P.; Tiller, P.

    1991-01-01

    The program is described for computation of Puiseux expansions of algebraic functions. The Newton diagram method is used for construction of initial coefficients of all the Puiseux series at the given point. The program is written in computer algebra language Reduce. Some illustrative examples are given. 20 refs

  3. Symbolic Computational Approach to the Marangoni Convection Problem With Soret Diffusion

    Science.gov (United States)

    Skarda, J. Raymond

    1998-01-01

    A recently reported solution for stationary stability of a thermosolutal system with Soret diffusion is re-derived and examined using a symbolic computational package. Symbolic computational languages are well suited for such an analysis and facilitate a pragmatic approach that is adaptable to similar problems. Linearization of the equations, normal mode analysis, and extraction of the final solution are performed in a Mathematica notebook format. An exact solution is obtained for stationary stability in the limit of zero gravity. A closed form expression is also obtained for the location of asymptotes in relevant parameter, (Sm(sub c), Mac(sub c)), space. The stationary stability behavior is conveniently examined within the symbolic language environment. An abbreviated version of the Mathematica notebook is given in the Appendix.

  4. Analytical SN solutions in heterogeneous slabs using symbolic algebra computer programs

    International Nuclear Information System (INIS)

    Warsa, J.S.

    2002-01-01

    A modern symbolic algebra computer program, MAPLE, is used to compute solutions to the well-known analytical discrete ordinates, or S N , solutions in one-dimensional, slab geometry. Symbolic algebra programs compute the solutions with arbitrary precision and are free of spatial discretization error so they can be used to investigate new discretizations for one-dimensional slab, geometry S N methods. Pointwise scalar flux solutions are computed for several sample calculations of interest. Sample MAPLE command scripts are provided to illustrate how easily the theory can be translated into a working solution and serve as a complete tool capable of computing analytical S N solutions for mono-energetic, one-dimensional transport problems

  5. Symbolic Computation of Strongly Connected Components Using Saturation

    Science.gov (United States)

    Zhao, Yang; Ciardo, Gianfranco

    2010-01-01

    Finding strongly connected components (SCCs) in the state-space of discrete-state models is a critical task in formal verification of LTL and fair CTL properties, but the potentially huge number of reachable states and SCCs constitutes a formidable challenge. This paper is concerned with computing the sets of states in SCCs or terminal SCCs of asynchronous systems. Because of its advantages in many applications, we employ saturation on two previously proposed approaches: the Xie-Beerel algorithm and transitive closure. First, saturation speeds up state-space exploration when computing each SCC in the Xie-Beerel algorithm. Then, our main contribution is a novel algorithm to compute the transitive closure using saturation. Experimental results indicate that our improved algorithms achieve a clear speedup over previous algorithms in some cases. With the help of the new transitive closure computation algorithm, up to 10(exp 150) SCCs can be explored within a few seconds.

  6. The Design of Software Learning Environments Using Symbolic Computation: Two Case Studies in Pre-calculus.

    Science.gov (United States)

    Lenne, Dominique; Lagrange, Jean-Baptiste; Gelis, Jean-Michel; Py, Dominique

    2002-01-01

    Describes an approach to the design of learning environments around a computer algebra kernel. Presents two environments to help students learn precalculus. Provides students with symbolic, graphic, and numeric tools as well as functionalities to help them build proofs. (Author/KHR)

  7. Computer-Aided Authoring of Programmed Instruction for Teaching Symbol Recognition. Final Report.

    Science.gov (United States)

    Braby, Richard; And Others

    This description of AUTHOR, a computer program for the automated authoring of programmed texts designed to teach symbol recognition, includes discussions of the learning strategies incorporated in the design of the instructional materials, hardware description and the algorithm for the software, and current and future developments. Appendices…

  8. Symbolic computation and its application to high energy physics

    International Nuclear Information System (INIS)

    Hearn, A.C.

    1981-01-01

    It is clear that we are in the middle of an electronic revolution whose effect will be as profound as the industrial revolution. The continuing advances in computing technology will provide us with devices which will make present day computers appear primitive. In this environment, the algebraic and other non-mumerical capabilities of such devices will become increasingly important. These lectures will review the present state of the field of algebraic computation and its potential for problem solving in high energy physics and related areas. We shall begin with a brief description of the available systems and examine the data objects which they consider. As an example of the facilities which these systems can offer, we shall then consider the problem of analytic integration, since this is so fundamental to many of the calculational techniques used by high energy physicists. Finally, we shall study the implications which the current developments in hardware technology hold for scientific problem solving. (orig.)

  9. Computational complexity of symbolic dynamics at the onset of chaos

    Science.gov (United States)

    Lakdawala, Porus

    1996-05-01

    In a variety of studies of dynamical systems, the edge of order and chaos has been singled out as a region of complexity. It was suggested by Wolfram, on the basis of qualitative behavior of cellular automata, that the computational basis for modeling this region is the universal Turing machine. In this paper, following a suggestion of Crutchfield, we try to show that the Turing machine model may often be too powerful as a computational model to describe the boundary of order and chaos. In particular we study the region of the first accumulation of period doubling in unimodal and bimodal maps of the interval, from the point of view of language theory. We show that in relation to the ``extended'' Chomsky hierarchy, the relevant computational model in the unimodal case is the nested stack automaton or the related indexed languages, while the bimodal case is modeled by the linear bounded automaton or the related context-sensitive languages.

  10. Special issue of Higher-Order and Symbolic Computation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Sabry, Amr

    This issue of HOSC is dedicated to the general topic of continuations. It grew out of the third ACM SIGPLAN Workshop on Continuations (CW'01), which took place in London, UK on January 16, 2001 [3]. The notion of continuation is ubiquitous in many different areas of computer science, including...... areas of logic and computer science. The articles in this special issue reflect this diversity. "Comparing Control Constructs by Double-barrelled CPS" studies the fundamental typing and logical properties (intuitionistic, classical, or linear) of various control operators in a simply typed lambda...... these two extremes includes many control constructs like exceptions, coroutines, and both forward and backward jumps to reified continuations. The authors review a variety of situations where the type system makes it possible to crystallize linear uses. "Secure Information Flow via Linear Continuations...

  11. Symbolic computation and its application to high energy physics

    CERN Document Server

    Hearn, A C

    1981-01-01

    Reviews the present state of the field of algebraic computation and its potential for problem solving in high energy physics and related areas. The author begins with a brief description of the available systems and examines the data objects which they consider. As an example of the facilities which these systems can offer, the author then considers the problem of analytic integration, since this is so fundamental to many of the calculational techniques used by high energy physicists. Finally, he studies the implications which the current developments in hardware technology hold for scientific problem solving. (20 refs).

  12. Analytical exploration of the thermodynamic potentials by using symbolic computation software

    International Nuclear Information System (INIS)

    Hantsaridou, Anastasia P; Polatoglou, Hariton M

    2005-01-01

    Thermodynamics is a very general theory, based on fundamental symmetries. It generalizes classical mechanics and incorporates theoretical concepts such as field and field equations. Although all these ingredients are of the highest importance for a scientist, they are not given the attention they perhaps deserve in most undergraduate courses. Nowadays, powerful computers in conjunction with equally powerful software can ease the exploration of the crucial ideas of thermodynamics. The purpose of the present work is to show how the utilization of symbolic computation software can lead to a complementary understanding of thermodynamics. The method was applied to first and second year physics students in the Aristotle University of Thessaloniki (Greece) during the 2002-2003 academic year. The results indicate that symbolic computation software is appropriate not only for enhancing the teaching of the fundamental principles in thermodynamics and their applications, but also for increasing students' motivation for learning

  13. The use of symbolic computation in radiative, energy, and neutron transport calculations

    Science.gov (United States)

    Frankel, J. I.

    This investigation uses symbolic computation in developing analytical methods and general computational strategies for solving both linear and nonlinear, regular and singular, integral and integro-differential equations which appear in radiative and combined mode energy transport. This technical report summarizes the research conducted during the first nine months of the present investigation. The use of Chebyshev polynomials augmented with symbolic computation has clearly been demonstrated in problems involving radiative (or neutron) transport, and mixed-mode energy transport. Theoretical issues related to convergence, errors, and accuracy have also been pursued. Three manuscripts have resulted from the funded research. These manuscripts have been submitted to archival journals. At the present time, an investigation involving a conductive and radiative medium is underway. The mathematical formulation leads to a system of nonlinear, weakly-singular integral equations involving the unknown temperature and various Legendre moments of the radiative intensity in a participating medium. Some preliminary results are presented illustrating the direction of the proposed research.

  14. Special issue of Higher-Order and Symbolic Computation

    DEFF Research Database (Denmark)

    Danvy, Olivier

    This double issue of HOSC is the first of two double issues dedicated to the memory of Bob Paige (1947–1999). Bob’s scientific interests were many, and his achievements were many as well, witness his research retrospective, which starts this special issue. In particular, Bob strongly contributed...... at the Courant Institute in New York, the members of the IFIP Working Group 2.1, and the people at the various Universities he visited, including the University of Copenhagen and the University of Wisconsin. All his friends and colleagues, enjoyed Bob’s talks and presentations. His ideas and his visions...... Differentiation technique in order to compute precisely the set of finite, divided differences of a sampled function F(x): F[x0, x1] = (F(x0) − F(x1))/(x0 − x1). The second double issue of HOSC dedicated to Bob’s memory will also contain technical contributions, as well as a non-technical retrospective...

  15. Exact computation and large angular momentum asymptotics of 3nj symbols: Semiclassical disentangling of spin networks

    International Nuclear Information System (INIS)

    Anderson, Roger W.; Aquilanti, Vincenzo; Silva Ferreira, Cristiane da

    2008-01-01

    Spin networks, namely, the 3nj symbols of quantum angular momentum theory and their generalizations to groups other than SU(2) and to quantum groups, permeate many areas of pure and applied science. The issues of their computation and characterization for large values of their entries are a challenge for diverse fields, such as spectroscopy and quantum chemistry, molecular and condensed matter physics, quantum computing, and the geometry of space time. Here we record progress both in their efficient calculation and in the study of the large j asymptotics. For the 9j symbol, a prototypical entangled network, we present and extensively check numerically formulas that illustrate the passage to the semiclassical limit, manifesting both the occurrence of disentangling and the discrete-continuum transition.

  16. New exact travelling wave solutions for two potential coupled KdV equations with symbolic computation

    International Nuclear Information System (INIS)

    Yang Zonghang

    2007-01-01

    We find new exact travelling wave solutions for two potential KdV equations which are presented by Foursov [Foursov MV. J Math Phys 2000;41:6173-85]. Compared with the extended tanh-function method, the algorithm used in our paper can obtain some new kinds of exact travelling wave solutions. With the aid of symbolic computation, some novel exact travelling wave solutions of the potential KdV equations are constructed

  17. Brute force meets Bruno force in parameter optimisation: introduction of novel constraints for parameter accuracy improvement by symbolic computation.

    Science.gov (United States)

    Nakatsui, M; Horimoto, K; Lemaire, F; Ürgüplü, A; Sedoglavic, A; Boulier, F

    2011-09-01

    Recent remarkable advances in computer performance have enabled us to estimate parameter values by the huge power of numerical computation, the so-called 'Brute force', resulting in the high-speed simultaneous estimation of a large number of parameter values. However, these advancements have not been fully utilised to improve the accuracy of parameter estimation. Here the authors review a novel method for parameter estimation using symbolic computation power, 'Bruno force', named after Bruno Buchberger, who found the Gröbner base. In the method, the objective functions combining the symbolic computation techniques are formulated. First, the authors utilise a symbolic computation technique, differential elimination, which symbolically reduces an equivalent system of differential equations to a system in a given model. Second, since its equivalent system is frequently composed of large equations, the system is further simplified by another symbolic computation. The performance of the authors' method for parameter accuracy improvement is illustrated by two representative models in biology, a simple cascade model and a negative feedback model in comparison with the previous numerical methods. Finally, the limits and extensions of the authors' method are discussed, in terms of the possible power of 'Bruno force' for the development of a new horizon in parameter estimation.

  18. Proceedings of the workshop on Compilation of (Symbolic) Languages for Parallel Computers

    Energy Technology Data Exchange (ETDEWEB)

    Foster, I.; Tick, E. (comp.)

    1991-11-01

    This report comprises the abstracts and papers for the talks presented at the Workshop on Compilation of (Symbolic) Languages for Parallel Computers, held October 31--November 1, 1991, in San Diego. These unreferred contributions were provided by the participants for the purpose of this workshop; many of them will be published elsewhere in peer-reviewed conferences and publications. Our goal is planning this workshop was to bring together researchers from different disciplines with common problems in compilation. In particular, we wished to encourage interaction between researchers working in compilation of symbolic languages and those working on compilation of conventional, imperative languages. The fundamental problems facing researchers interested in compilation of logic, functional, and procedural programming languages for parallel computers are essentially the same. However, differences in the basic programming paradigms have led to different communities emphasizing different species of the parallel compilation problem. For example, parallel logic and functional languages provide dataflow-like formalisms in which control dependencies are unimportant. Hence, a major focus of research in compilation has been on techniques that try to infer when sequential control flow can safely be imposed. Granularity analysis for scheduling is a related problem. The single- assignment property leads to a need for analysis of memory use in order to detect opportunities for reuse. Much of the work in each of these areas relies on the use of abstract interpretation techniques.

  19. Symbolic computation of equivalence transformations and parameter reduction for nonlinear physical models

    Science.gov (United States)

    Cheviakov, Alexei F.

    2017-11-01

    An efficient systematic procedure is provided for symbolic computation of Lie groups of equivalence transformations and generalized equivalence transformations of systems of differential equations that contain arbitrary elements (arbitrary functions and/or arbitrary constant parameters), using the software package GeM for Maple. Application of equivalence transformations to the reduction of the number of arbitrary elements in a given system of equations is discussed, and several examples are considered. The first computational example of generalized equivalence transformations where the transformation of the dependent variable involves an arbitrary constitutive function is presented. As a detailed physical example, a three-parameter family of nonlinear wave equations describing finite anti-plane shear displacements of an incompressible hyperelastic fiber-reinforced medium is considered. Equivalence transformations are computed and employed to radically simplify the model for an arbitrary fiber direction, invertibly reducing the model to a simple form that corresponds to a special fiber direction, and involves no arbitrary elements. The presented computation algorithm is applicable to wide classes of systems of differential equations containing arbitrary elements.

  20. Symbolic-computation study of the perturbed nonlinear Schrodinger model in inhomogeneous optical fibers

    International Nuclear Information System (INIS)

    Tian Bo; Gao Yitian

    2005-01-01

    A realistic, inhomogeneous fiber in the optical communication systems can be described by the perturbed nonlinear Schrodinger model (also named as the normalized nonlinear Schrodinger model with periodically varying coefficients, dispersion managed nonlinear Schrodinger model or nonlinear Schrodinger model with variable coefficients). Hereby, we extend to this model a direct method, perform symbolic computation and obtain two families of the exact, analytic bright-solitonic solutions, with or without the chirp respectively. The parameters addressed include the shape of the bright soliton, soliton amplitude, inverse width of the soliton, chirp, frequency, center of the soliton and center of the phase of the soliton. Of optical and physical interests, we discuss some previously-published special cases of our solutions. Those solutions could help the future studies on the optical communication systems. ms

  1. A symbolic shortest path algorithm for computing subgame-perfect Nash equilibria

    Directory of Open Access Journals (Sweden)

    Góngora Pedro A.

    2015-09-01

    Full Text Available Consider games where players wish to minimize the cost to reach some state. A subgame-perfect Nash equilibrium can be regarded as a collection of optimal paths on such games. Similarly, the well-known state-labeling algorithm used in model checking can be viewed as computing optimal paths on a Kripke structure, where each path has a minimum number of transitions. We exploit these similarities in a common generalization of extensive games and Kripke structures that we name “graph games”. By extending the Bellman-Ford algorithm for computing shortest paths, we obtain a model-checking algorithm for graph games with respect to formulas in an appropriate logic. Hence, when given a certain formula, our model-checking algorithm computes the subgame-perfect Nash equilibrium (as opposed to simply determining whether or not a given collection of paths is a Nash equilibrium. Next, we develop a symbolic version of our model checker allowing us to handle larger graph games. We illustrate our formalism on the critical-path method as well as games with perfect information. Finally, we report on the execution time of benchmarks of an implementation of our algorithms

  2. Integrating Symbolic and Statistical Methods for Testing Intelligent Systems Applications to Machine Learning and Computer Vision

    Energy Technology Data Exchange (ETDEWEB)

    Jha, Sumit Kumar [University of Central Florida, Orlando; Pullum, Laura L [ORNL; Ramanathan, Arvind [ORNL

    2016-01-01

    Embedded intelligent systems ranging from tiny im- plantable biomedical devices to large swarms of autonomous un- manned aerial systems are becoming pervasive in our daily lives. While we depend on the flawless functioning of such intelligent systems, and often take their behavioral correctness and safety for granted, it is notoriously difficult to generate test cases that expose subtle errors in the implementations of machine learning algorithms. Hence, the validation of intelligent systems is usually achieved by studying their behavior on representative data sets, using methods such as cross-validation and bootstrapping.In this paper, we present a new testing methodology for studying the correctness of intelligent systems. Our approach uses symbolic decision procedures coupled with statistical hypothesis testing to. We also use our algorithm to analyze the robustness of a human detection algorithm built using the OpenCV open-source computer vision library. We show that the human detection implementation can fail to detect humans in perturbed video frames even when the perturbations are so small that the corresponding frames look identical to the naked eye.

  3. Neural computing for numeric-to-symbolic conversion in control systems

    Science.gov (United States)

    Passino, Kevin M.; Sartori, Michael A.; Antsaklis, Panos J.

    1989-01-01

    A type of neural network, the multilayer perceptron, is used to classify numeric data and assign appropriate symbols to various classes. This numeric-to-symbolic conversion results in a type of information extraction, which is similar to what is called data reduction in pattern recognition. The use of the neural network as a numeric-to-symbolic converter is introduced, its application in autonomous control is discussed, and several applications are studied. The perceptron is used as a numeric-to-symbolic converter for a discrete-event system controller supervising a continuous variable dynamic system. It is also shown how the perceptron can implement fault trees, which provide useful information (alarms) in a biological system and information for failure diagnosis and control purposes in an aircraft example.

  4. Symbolic computation of exact solutions expressible in rational formal hyperbolic and elliptic functions for nonlinear partial differential equations

    International Nuclear Information System (INIS)

    Wang Qi; Chen Yong

    2007-01-01

    With the aid of symbolic computation, some algorithms are presented for the rational expansion methods, which lead to closed-form solutions of nonlinear partial differential equations (PDEs). The new algorithms are given to find exact rational formal polynomial solutions of PDEs in terms of Jacobi elliptic functions, solutions of the Riccati equation and solutions of the generalized Riccati equation. They can be implemented in symbolic computation system Maple. As applications of the methods, we choose some nonlinear PDEs to illustrate the methods. As a result, we not only can successfully obtain the solutions found by most existing Jacobi elliptic function methods and Tanh-methods, but also find other new and more general solutions at the same time

  5. Painleve Analysis and Darboux Transformation for a Variable-Coefficient Boussinesq System in Fluid Dynamics with Symbolic Computation

    International Nuclear Information System (INIS)

    Li Hongzhe; Tian Bo; Li Lili; Zhang Haiqiang

    2010-01-01

    The new soliton solutions for the variable-coefficient Boussinesq system, whose applications are seen in fluid dynamics, are studied in this paper with symbolic computation. First, the Painleve analysis is used to investigate its integrability properties. For the identified case we give, the Lax pair of the system is found, and then the Darboux transformation is constructed. At last, some new soliton solutions are presented via the Darboux method. Those solutions might be of some value in fluid dynamics. (general)

  6. THE COMPUTER SIMULATOR-CONTROLLER FOR LEARNING SIGN AND SYMBOLIC MEANS OF PHYSICS

    Directory of Open Access Journals (Sweden)

    N.I. Tikhonskaya

    2012-10-01

    Full Text Available The promising application of information technology for learning sign and symbolic means of physics is proposed and theoretically proved in this article. This direction is connected with the idea of training students the presentation of information in different forms.

  7. A Maple Package on Symbolic Computation of Conserved Densities for (1+1)-Dimensional Nonlinear Evolution Systems

    International Nuclear Information System (INIS)

    Yang Xudong; Ruan Hangyu; Lou Senyue

    2007-01-01

    A new algorithm for symbolic computation of polynomial-type conserved densities for nonlinear evolution systems is presented. The algorithm is implemented in Maple. The improved algorithm is more efficient not only in removing the redundant terms of the general form of the conserved densities but also in solving the conserved densities with the associated flux synchronously without using Euler operator. Furthermore, the program conslaw.mpl can be used to determine the preferences for a given parameterized nonlinear evolution systems. The code is tested on several well-known nonlinear evolution equations from the soliton theory.

  8. Contextualizing symbol, symbolizing context

    Science.gov (United States)

    Maudy, Septiani Yugni; Suryadi, Didi; Mulyana, Endang

    2017-08-01

    When students learn algebra for the first time, inevitably they are experiencing transition from arithmetic to algebraic thinking. Once students could apprehend this essential mathematical knowledge, they are cultivating their ability in solving daily life problems by applying algebra. However, as we dig into this transitional stage, we identified possible students' learning obstacles to be dealt with seriously in order to forestall subsequent hindrance in studying more advance algebra. We come to realize this recurring problem as we undertook the processes of re-personalization and re-contextualization in which we scrutinize the very basic questions: 1) what is variable, linear equation with one variable and their relationship with the arithmetic-algebraic thinking? 2) Why student should learn such concepts? 3) How to teach those concepts to students? By positioning ourselves as a seventh grade student, we address the possibility of children to think arithmetically when confronted with the problems of linear equation with one variable. To help them thinking algebraically, Bruner's modes of representation developed contextually from concrete to abstract were delivered to enhance their interpretation toward the idea of variables. Hence, from the outset we designed the context for student to think symbolically initiated by exploring various symbols that could be contextualized in order to bridge student traversing the arithmetic-algebraic fruitfully.

  9. Symbol manipulation by computer applied to plasma physics. Technical progress report 2

    International Nuclear Information System (INIS)

    Rosen, B.

    1977-09-01

    Progress has been made in automating the calculation of parametric processes analytically by computer. The computations are performed automatically to lowest order quickly and efficiently. Work has started on a method for solving the nonlinear differential equations describing interacting modes

  10. (3 + 1)-dimensional cylindrical Korteweg-de Vries equation for nonextensive dust acoustic waves: Symbolic computation and exact solutions

    International Nuclear Information System (INIS)

    Guo Shimin; Wang Hongli; Mei Liquan

    2012-01-01

    By combining the effects of bounded cylindrical geometry, azimuthal and axial perturbations, the nonlinear dust acoustic waves (DAWs) in an unmagnetized plasma consisting of negatively charged dust grains, nonextensive ions, and nonextensive electrons are studied in this paper. Using the reductive perturbation method, a (3 + 1)-dimensional variable-coefficient cylindrical Korteweg-de Vries (KdV) equation describing the nonlinear propagation of DAWs is derived. Via the homogeneous balance principle, improved F-expansion technique and symbolic computation, the exact traveling and solitary wave solutions of the KdV equation are presented in terms of Jacobi elliptic functions. Moreover, the effects of the plasma parameters on the solitary wave structures are discussed in detail. The obtained results could help in providing a good fit between theoretical analysis and real applications in space physics and future laboratory plasma experiments where long-range interactions are present.

  11. Assembly processor program converts symbolic programming language to machine language

    Science.gov (United States)

    Pelto, E. V.

    1967-01-01

    Assembly processor program converts symbolic programming language to machine language. This program translates symbolic codes into computer understandable instructions, assigns locations in storage for successive instructions, and computer locations from symbolic addresses.

  12. Symbolic signal processing

    International Nuclear Information System (INIS)

    Rechester, A.B.; White, R.B.

    1993-01-01

    Complex dynamic processes exhibit many complicated patterns of evolution. How can all these patterns be recognized using only output (observational, experimental) data without prior knowledge of the equations of motion? The powerful method for doing this is based on symbolic dynamics: (1) Present output data in symbolic form (trial language). (2) Topological and metric entropies are constructed. (3) Develop algorithms for computer optimization of entropies. (4) By maximizing entropies, find the most appropriate symbolic language for the purpose of pattern recognition. (5) Test this method using a variety of dynamical models from nonlinear science. The authors are in the process of applying this method for analysis of MHD fluctuations in tokamaks

  13. The use of symbolic computation in radiative, energy, and neutron transport calculations. Final report

    International Nuclear Information System (INIS)

    Frankel, J.I.

    1997-01-01

    This investigation used sysmbolic manipulation in developing analytical methods and general computational strategies for solving both linear and nonlinear, regular and singular integral and integro-differential equations which appear in radiative and mixed-mode energy transport. Contained in this report are seven papers which present the technical results as individual modules

  14. Symbolic computation on integrable decompositions for the cylindrical Kadomtsev-Petviashvili equation from dusty plasmas and Bose-Einstein condensates

    International Nuclear Information System (INIS)

    Li Juan; Xu Tao; Zhang Haiqiang; Gao Yitian; Tian Bo

    2008-01-01

    In this paper, the cylindrical Kadomtsev-Petviashvili (KP) equation arising from dusty plasmas and Bose-Einstein condensates is investigated by the decomposition method. Through the nonlinearization of a single Lax pair, this equation is decomposed into a generalized variable-coefficient Burgers equation and its third-order extension, and then a series of analytic soliton-like solutions are obtained. Furthermore, with the aid of symbolic computation, a symmetry potential constraint in terms of the squared eigenfunctions is proposed to nonlinearize two symmetry Lax pairs into the first two variable-coefficient 2N-coupled soliton systems in the same hierarchy. Based on the Lax representation for these two decomposed soliton systems, a Darboux transformation is constructed to iteratively generate the multi-soliton-like solutions. Via the obtained analytic soliton-like solutions, the graphical analysis is devoted to the one-parabola soliton structure, compressive and rarefactive soliton resonance phenomena occurring in dusty plasmas and Bose-Einstein condensates

  15. CADMIUM II: combining image processing and symbolic reasoning for computer-aided diagnosis

    Science.gov (United States)

    Taylor, Paul; Alberdi, Eugenio; Lee, Richard; Fox, John; Sordo, Margarita; Todd-Pokropek, Andrew

    2000-06-01

    This paper describes a prototype computer aided diagnosis system to assist in the interpretation of mammograms. The distinctive feature of our work is the combination of image processing and decision support. We wish, in our system, to relate the data in a digital image to a decision contained in a clinical guideline describing a patient's management. Our system is designed to present a user with sets of arguments for each of the possible interpretations of a feature detected on the image and for each of the possible management options that might be followed in handling the patient's care. We have carried out an extensive knowledge elicitation exercise, involving the analysis of 'think out loud' protocols obtained from expert radiologists interpreting mammograms form a carefully selected test set. The results of this analysis reveal which terms capture the most salient characteristics of calcifications. These terms will be used to construct the arguments used in the decision support provided by CADMIUM II. The final element of CADMIUM II is a library of image processing algorithms. A set of different approaches to the detection and characterization of calcifications has been implemented. The image processing is used to provide a quantitative estimate of the evidence that an image contains in support of an argument.

  16. [Comparison of event-related potentials components characteristics obtained during stimulation of symbolical and alphabetic matrixes used in brain-computer interface paradigm].

    Science.gov (United States)

    Saltykov, K A; Bark, E D; Kulikov, M A

    2014-01-01

    In order to create a brain-computer interface (BCI) on the basis of paradigm P300 (the so-called Farwell-Donchin paradigm, FD) with a symbolical matrix used as stimuli, there were compared characteristics of event-related potentials (ERP) obtained from stimulation both by symbolical and alphabetical matrixes. The matrixes contained 6 x 6 signs (cyrillic letters or symbols-pictograms). Nine healthy adults were examined in 18 experiments during which 28 channel EEG were recorded while matrixes of two types (containing either cyrillic letters or symbols-pictograms) were used for stimulation. The obtained ERP data, i.e. amplitudes and peak latencies of the following components of ERP: N1, P3 with sub-components P3a and P3b, N4 were compared and analized for different types of the stimulation matrixes. Similar changes in amplitude or peak latency received from 7 or more out of 9 examinees were taken into consideration, matching the criteria of significance. It was discovered that for components P3a, P3b and N4 the amplitudes of ERP in response to a symbolic matrix were bigger than to a letter matrix, the opposite being true for component N1. Latent periods of ERP components were shorter for a symbolic matrix than for a letter matrix in case of components N1 and P3a, and longer in case of P3b and N4. In order to find out which zones of the brain react to stimulation the most, there was conducted a pair t-test (series of pair t-tests) to analize the topography of variety of ERP responses to different types of stimuli, and, through comparing the amplitudes of ERP components, a topographical map detailing the variety of responses to the different types of matrixes was obtained. The data about the differences were analized separately for each of 28 channels, then the (absolute magnitude t-test) were summed up algebraically for all the nine examinees. Thus, it was shown, for amplitudes of all the tested ERP components in the case of pair "significant-insignificant letters

  17. Animated symbols

    DEFF Research Database (Denmark)

    Frølunde, Lisbeth

    2008-01-01

    This paper is based on data about animation film production by 18-year-old students in a Danish upper secondary school. The optic is the on-going potential for learning and development of reflection. The purpose is to clarify what might support young people's reflection on media. I propose...... an analytic working model called Animated Symbols concerning critical reflection in a dialogic learning process. The model shows dialogue as interactions that involve two types of transformation: inner ‘learning processes' and outer signs and symbols. The classroom-based research study is part of a Ph...

  18. Animated Symbols

    DEFF Research Database (Denmark)

    Frolunde, Lisbeth

    ' processer af fem udvalgte elever er gennemgået i forhold til tre opdelinger: filmskabere, filmskabelse processen og film. Den teoretiske tilgang er pragmatisme, social semiotik og diskursanalyse. Modellen "Animating Symbols" er udviklet og diskuteret som forsøg på at forstå reflektion og design som en slags...

  19. Symbol Recognition using Spatial Relations

    OpenAIRE

    K.C., Santosh; Lamiroy, Bart; Wendling, Laurent

    2012-01-01

    International audience; In this paper, we present a method for symbol recognition based on the spatio-structural description of a 'vocabulary' of extracted visual elementary parts. It is applied to symbols in electrical wiring diagrams. The method consists of first identifying vocabulary elements into different groups based on their types (e.g., circle, corner ). We then compute spatial relations between the possible pairs of labelled vocabulary types which are further used as a basis for bui...

  20. Symbols are not uniquely human.

    Science.gov (United States)

    Ribeiro, Sidarta; Loula, Angelo; de Araújo, Ivan; Gudwin, Ricardo; Queiroz, João

    2007-01-01

    Modern semiotics is a branch of logics that formally defines symbol-based communication. In recent years, the semiotic classification of signs has been invoked to support the notion that symbols are uniquely human. Here we show that alarm-calls such as those used by African vervet monkeys (Cercopithecus aethiops), logically satisfy the semiotic definition of symbol. We also show that the acquisition of vocal symbols in vervet monkeys can be successfully simulated by a computer program based on minimal semiotic and neurobiological constraints. The simulations indicate that learning depends on the tutor-predator ratio, and that apprentice-generated auditory mistakes in vocal symbol interpretation have little effect on the learning rates of apprentices (up to 80% of mistakes are tolerated). In contrast, just 10% of apprentice-generated visual mistakes in predator identification will prevent any vocal symbol to be correctly associated with a predator call in a stable manner. Tutor unreliability was also deleterious to vocal symbol learning: a mere 5% of "lying" tutors were able to completely disrupt symbol learning, invariably leading to the acquisition of incorrect associations by apprentices. Our investigation corroborates the existence of vocal symbols in a non-human species, and indicates that symbolic competence emerges spontaneously from classical associative learning mechanisms when the conditioned stimuli are self-generated, arbitrary and socially efficacious. We propose that more exclusive properties of human language, such as syntax, may derive from the evolution of higher-order domains for neural association, more removed from both the sensory input and the motor output, able to support the gradual complexification of grammatical categories into syntax.

  1. Symbolic PathFinder v7

    DEFF Research Database (Denmark)

    Luckow, Kasper Søe; Păsăreanu, Corina

    2014-01-01

    We describe Symbolic PathFinder v7 in terms of its updated design addressing the changes of Java PathFinder v7 and of its new optimization when computing path conditions. Furthermore, we describe the Symbolic Execution Tree Extension; a newly added feature that allows for outputting the symbolic...... execution tree that characterizes the execution paths covered during symbolic execution. The new extension can be tailored to the needs of subsequent analyses/processing facilities, and we demonstrate this by presenting SPF-Visualizer, which is a tool for customizable visualization of the symbolic execution...

  2. The myocardial microangiopathy in human and experimental diabetes mellitus. (A microscopic, ultrastructural, morphometric and computer-assisted symbolic-logic analysis).

    Science.gov (United States)

    Taşcă, C; Stefăneanu, L; Vasilescu, C

    1986-01-01

    The following microscopical aspects were found in the small intramural arteries in the myocardium of 30 diabetic patients: endothelial proliferations with focal protuberances leading to partial narrowing of the lumen, increased thickness of the arterial wall due to fibrosis and accumulations of neutral mucopolysaccharides: alteration of elastic fibres. Morphometrically, the arterial wall thickness and the arterial diameter were increased whereas the arterial density decreased in the diabetic heart. In 25 rats with streptozotocin-induced diabetes the small intramyocardial arteries were investigated at 11 to 40 weeks of diabetic state. Using morphometrical analysis a constant increase of arterial wall thickness paralleling the diabetes duration was found. Microscopically, the lesions consist in endothelial proliferation with bridging across the vascular lumen and slight perivascular and diffuse fibrosis. Ultrastructurally, the capillary basal lamina was thickened in the diabetic myocardium. In order to investigate the morphometrical data we used symbolic-logic as a decision method, by applying an original computer program based on the Quine-McCluskey algorithm. All our results together with the final symbolic-logic expression suggest that damage of the small intramyocardial arteries plays an important role in the pathogenesis of diabetic cardiomyopathy.

  3. Symbol-based society; Kigoka shakai

    Energy Technology Data Exchange (ETDEWEB)

    Tamura, K. [Chukyo University, Nagoya (Japan)

    1999-05-10

    Many believe that the greatest invention in this century is computer. A computer is not a mere `calculation` machine, but a processor of `symbols` as purified languages. In other words, it is a machine exhibiting intelligence with given programs and data, by which man`s intelligence is made objective not as psychology but as symbol-processing mechanism. As a result, a new intellectual continent by the name of cyberspace is created. Symbolization has started to fly high with the wings of internet. The information network is not the sole infrastructure affected by symbolization. The distribution network is already starting intellectualization (symbolization) as ITS, and the energy network will be an ideal target of symbolization. In spite of unceasingly expanding software, however, the computer is still powerless to some intellectual activities (e.g., language learning) easy even for infants, and there are continual fears of bags. (NEDO)

  4. Symbolic derivation of high-order Rayleigh-Schroedinger perturbation energies using computer algebra: Application to vibrational-rotational analysis of diatomic molecules

    Energy Technology Data Exchange (ETDEWEB)

    Herbert, John M. [Kansas State Univ., Manhattan, KS (United States). Dept. of Chemistry

    1997-01-01

    Rayleigh-Schroedinger perturbation theory is an effective and popular tool for describing low-lying vibrational and rotational states of molecules. This method, in conjunction with ab initio techniques for computation of electronic potential energy surfaces, can be used to calculate first-principles molecular vibrational-rotational energies to successive orders of approximation. Because of mathematical complexities, however, such perturbation calculations are rarely extended beyond the second order of approximation, although recent work by Herbert has provided a formula for the nth-order energy correction. This report extends that work and furnishes the remaining theoretical details (including a general formula for the Rayleigh-Schroedinger expansion coefficients) necessary for calculation of energy corrections to arbitrary order. The commercial computer algebra software Mathematica is employed to perform the prohibitively tedious symbolic manipulations necessary for derivation of generalized energy formulae in terms of universal constants, molecular constants, and quantum numbers. As a pedagogical example, a Hamiltonian operator tailored specifically to diatomic molecules is derived, and the perturbation formulae obtained from this Hamiltonian are evaluated for a number of such molecules. This work provides a foundation for future analyses of polyatomic molecules, since it demonstrates that arbitrary-order perturbation theory can successfully be applied with the aid of commercially available computer algebra software.

  5. Symbols of a cosmic order

    Science.gov (United States)

    Madjid, F. Hadi; Myers, John M.

    2016-10-01

    The world runs on networks over which signals communicate sequences of symbols, e.g. numerals. Examining both engineered and natural communications networks reveals an unsuspected order that depends on contact with an unpredictable entity. This order has three roots. The first is a proof within quantum theory that no evidence can ever determine its explanation, so that an agent choosing an explanation must do so unpredictably. The second root is the showing that clocks that step computers do not "tell time" but serve as self-adjusting symbol-handling agents that regulate "logically synchronized" motion in response to unpredictable disturbances. Such a clock-agent has a certain independence as well as the capacity to communicate via unpredictable symbols with other clock-agents and to adjust its own tick rate in response to that communication. The third root is the noticing of unpredictable symbol exchange in natural systems, including the transmission of symbols found in molecular biology. We introduce a symbol-handling agent as a role played in some cases by a person, for example a physicist who chooses an explanation of given experimental outcomes, and in other cases by some other biological entity, and in still other cases by an inanimate device, such as a computer-based detector used in physical measurements. While we forbear to try to explain the propensity of agents at all levels from cells to civilizations to form and operate networks of logically synchronized symbol-handling agents, we point to this propensity as an overlooked cosmic order, an order structured by the unpredictability ensuing from the proof. Appreciating the cosmic order leads to a conception of agency that replaces volition by unpredictability and reconceives the notion of objectivity in a way that makes a place for agency in the world as described by physics. Some specific implications for physics are outlined.

  6. Experiences in evaluating outcomes in tool-based, competence building education in dynamical systems using symbolic computer algebra

    DEFF Research Database (Denmark)

    Perram, John; Andersen, Morten; Ellerkilde, Lars

    2005-01-01

    This paper discusses experience with alternative assessment strategies for an introductory course in dynamical systems, where the use of computer algebra and calculus is fully integrated into the learning process, so that the standard written examination would not be appropriate. Instead, students...

  7. The mathematica guidebook for symbolics

    CERN Document Server

    Trott, Michael

    2006-01-01

    Mathematica is today's most advanced technical computing system. It features a rich programming environment, two-and three-dimensional graphics capabilities and hundreds of sophisticated, powerful programming and mathematical functions using state-of-the-art algorithms. Combined with a user-friendly interface, and a complete mathematical typesetting system, Mathematica offers an intuitive easy-to-handle environment of great power and utility. "The Mathematica GuideBook for Symbolics" (code and text fully tailored for Mathematica 5.1) deals with Mathematica's symbolic mathematical capabilities. Structural and mathematical operations on single and systems of polynomials are fundamental to many symbolic calculations and they are covered in considerable detail. The solution of equations and differential equations, as well as the classical calculus operations (differentiation, integration, summation, series expansion, limits) are exhaustively treated. Generalized functions and their uses are discussed. In addition...

  8. Nuclear reactors; graphical symbols

    International Nuclear Information System (INIS)

    1987-11-01

    This standard contains graphical symbols that reveal the type of nuclear reactor and is used to design graphical and technical presentations. Distinguishing features for nuclear reactors are laid down in graphical symbols. (orig.) [de

  9. Universal Symbols and Cartography.

    Science.gov (United States)

    Modley, Rudolf

    The broad use of maps by non-cartographers imposes on the cartographer the burden to make maps not only accurate, but to use symbols which make map-reading easier for the public. The latter requirement implies a need for universal symbols. Although there are no universal symbols today (letters, words, and figures, to a lesser extent, are dependent…

  10. NMR-CT image and symbol phantoms

    International Nuclear Information System (INIS)

    Hongo, Syozo; Yamaguchi, Hiroshi; Takeshita, Hiroshi

    1990-01-01

    We have developed Japanese phantoms in two procedures. One is described as a mathematical expression. Another is 'symbol phantoms' in 3 dimensional picture-elements, each of which symbolize an organ name. The concept and the algorithm of the symbol phantom enables us to make a phantom for a individual in terms of all his transversal section images. We got 85 transversal section images of head and trunk parts, and those of 40 legs parts by using NMR-CT. We have made the individual phantom for computation of organ doses. The transversal section images were not so clear to identify all organs needed to dose estimation that we had to do hand-editing the shapes of organs with viewing a typical section images: we could not yet make symbol phantom in a automatic editing. Symbols were coded to be visual cords as ASCII characters. After we got the symbol phantom of the first stage, we can edit it easily using a word-processor. Symbol phantom could describe more freely the shape of organs than mathematical phantom. Symbol phantom has several advantages to be an individual phantom, but the only difficult point is how to determine its end-point as a reference man when we apply the method to build the reference man. (author)

  11. Statistical Symbolic Execution with Informed Sampling

    Science.gov (United States)

    Filieri, Antonio; Pasareanu, Corina S.; Visser, Willem; Geldenhuys, Jaco

    2014-01-01

    Symbolic execution techniques have been proposed recently for the probabilistic analysis of programs. These techniques seek to quantify the likelihood of reaching program events of interest, e.g., assert violations. They have many promising applications but have scalability issues due to high computational demand. To address this challenge, we propose a statistical symbolic execution technique that performs Monte Carlo sampling of the symbolic program paths and uses the obtained information for Bayesian estimation and hypothesis testing with respect to the probability of reaching the target events. To speed up the convergence of the statistical analysis, we propose Informed Sampling, an iterative symbolic execution that first explores the paths that have high statistical significance, prunes them from the state space and guides the execution towards less likely paths. The technique combines Bayesian estimation with a partial exact analysis for the pruned paths leading to provably improved convergence of the statistical analysis. We have implemented statistical symbolic execution with in- formed sampling in the Symbolic PathFinder tool. We show experimentally that the informed sampling obtains more precise results and converges faster than a purely statistical analysis and may also be more efficient than an exact symbolic analysis. When the latter does not terminate symbolic execution with informed sampling can give meaningful results under the same time and memory limits.

  12. Self-organisation of symbolic information

    Science.gov (United States)

    Feistel, R.

    2017-01-01

    Information is encountered in two different appearances, in native form by arbitrary physical structures, or in symbolic form by coded sequences of letters or the like. The self-organised emergence of symbolic information from structural information is referred to as a ritualisation transition. Occurring at some stage in evolutionary history, ritualisation transitions have in common that after the crossover, arbitrary symbols are issued and recognised by information-processing devices, by transmitters and receivers in the sense of Shannon's communication theory. Symbolic information-processing systems exhibit the fundamental code symmetry whose key features, such as largely lossless copying or persistence under hostile conditions, may elucidate the reasons for the repeated successful occurrence of ritualisation phenomena in evolution history. Ritualisation examples are briefly reviewed such as the origin of life, the appearance of human languages, the establishment of emergent social categories such as money, or the development of digital computers. In addition to their role as carriers of symbolic information, symbols are physical structures which also represent structural information. For a thermodynamic description of symbols and their arrangements, it appears reasonable to distinguish between Boltzmann entropy, Clausius entropy and Pauling entropy. Thermodynamic properties of symbols imply that their lifetimes are limited by the 2nd law.

  13. Discrete Symbol Calculus

    OpenAIRE

    Demanet, Laurent; Ying, Lexing

    2008-01-01

    This paper deals with efficient numerical representation and manipulation of differential and integral operators as symbols in phase-space, i.e., functions of space $x$ and frequency $\\xi$. The symbol smoothness conditions obeyed by many operators in connection to smooth linear partial differential equations allow to write fast-converging, non-asymptotic expansions in adequate systems of rational Chebyshev functions or hierarchical splines. The classical results of closedness of such symbol c...

  14. Graphical symbol recognition

    OpenAIRE

    K.C. , Santosh; Wendling , Laurent

    2015-01-01

    International audience; The chapter focuses on one of the key issues in document image processing i.e., graphical symbol recognition. Graphical symbol recognition is a sub-field of a larger research domain: pattern recognition. The chapter covers several approaches (i.e., statistical, structural and syntactic) and specially designed symbol recognition techniques inspired by real-world industrial problems. It, in general, contains research problems, state-of-the-art methods that convey basic s...

  15. Quantities, Units, and Symbols.

    Science.gov (United States)

    Royal Society, London (England).

    This booklet provides a reference to the quantities, units, and their symbols which are used in physical science. It is a revision of a 1969 report and takes account of the progress which has been made in obtaining international agreement on the definitions, names, and symbols for units and on the rules for the expression of relations involving…

  16. Symbol: artefact and model

    DEFF Research Database (Denmark)

    Galle, Per

    2000-01-01

    In preparation of an analysis of product modelling in terms of communication, this report presents a brief analysis of symbols; that is, the entities by means of which communication takes place. Symbols are defined in such a way as to admit artefacts and models (the latter including linguistic...

  17. Two cultures - one symbol

    Directory of Open Access Journals (Sweden)

    O. G. Shostak

    2003-06-01

    Full Text Available This paper is dedicated to the question of similarities in the approach to the multilevel symbolism in Slav and Native American cultures. Ambivalent symbol of the snake is analyzed in the frame of mythological thinking. At the end the author comes to the conclusion that elements of mythological thinking are still present in everyday life and influence human behavior levels

  18. Exact and Approximate Probabilistic Symbolic Execution

    Science.gov (United States)

    Luckow, Kasper; Pasareanu, Corina S.; Dwyer, Matthew B.; Filieri, Antonio; Visser, Willem

    2014-01-01

    Probabilistic software analysis seeks to quantify the likelihood of reaching a target event under uncertain environments. Recent approaches compute probabilities of execution paths using symbolic execution, but do not support nondeterminism. Nondeterminism arises naturally when no suitable probabilistic model can capture a program behavior, e.g., for multithreading or distributed systems. In this work, we propose a technique, based on symbolic execution, to synthesize schedulers that resolve nondeterminism to maximize the probability of reaching a target event. To scale to large systems, we also introduce approximate algorithms to search for good schedulers, speeding up established random sampling and reinforcement learning results through the quantification of path probabilities based on symbolic execution. We implemented the techniques in Symbolic PathFinder and evaluated them on nondeterministic Java programs. We show that our algorithms significantly improve upon a state-of- the-art statistical model checking algorithm, originally developed for Markov Decision Processes.

  19. Three Alternative Symbol-Lock Detectors

    Science.gov (United States)

    Shihabi, Mazen M.; Hinedi, Sami M.; Shah, Biren N.

    1993-01-01

    Three symbol-lock detectors proposed as alternatives in advanced receivers processing non-return-to-zero binary data signals. Two perform operations similar to those of older square-law and absolute-value types. However, integrals computed during nonoverlapping symbol periods and, therefore, only one integrator needed in each such detector. Proposed detectors simpler, but performances worse because noises in overlapping samples correlated, whereas noises in nonoverlapping samples not correlated. Third detector is signal-power-estimator type. Signal integrated during successive half symbol cycles, and therefore only one integrator needed. Half-cycle integrals multiplied to eliminate effect of symbol polarity, and products accumulated during M-cycle observation period to smooth out estimate of signal power. If estimated signal power exceeds threshold, delta, then lock declared.

  20. Noncoherent Symbol Synchronization Techniques

    Science.gov (United States)

    Simon, Marvin

    2005-01-01

    Traditional methods for establishing symbol synchronization (sync) in digital communication receivers assume that carrier sync has already been established, i.e., the problem is addressed at the baseband level assuming that a 'perfect' estimate of carrier phase is available. We refer to this approach as coherent symbol sync. Since, for NRZ signaling, a suppressed carrier sync loop such as an I-Q Costas loop includes integrate-and-dump (I and D) filters in its in-phase (1) and quadrature (Q) arms, the traditional approach is to first track the carrier in the absence of symbol sync information, then feed back the symbol sync estimate to these filters, and then iterate between the two to a desirable operating level In this paper, we revisit the symbol sync problem by examining methods for obtaining such sync in the absence of carrier phase information, i.e., so-called noncoherent symbol sync loops. We compare the performance of these loops with that of a well-known coherent symbol sync loop and examine the conditions under which one is preferable over the other.

  1. New solitary solutions and non-elastic interactions of the (2 + 1)-dimensional variable-coefficient Broer-Kaup system with symbolic computation

    International Nuclear Information System (INIS)

    Geng Tao; Shan Wenrui; Lue Xing; Cai Kejie; Zhang Cheng; Tian Bo

    2009-01-01

    Fusion and fission phenomena for solitary waves have been discovered theoretically and experimentally. In this paper, the (2 + 1)-dimensional variable-coefficient Broer-Kaup system is symbolically investigated. By employing the bilinear method, new solitary solutions with arbitrary functions are obtained. At the same time, the non-elastic interactions of solitary solutions are graphically studied. Furthermore, soliton fusion and fission phenomena are revealed by choosing appropriate functions.

  2. Symbolic Relationships in Advertisements

    Directory of Open Access Journals (Sweden)

    Costin Popescu

    2017-07-01

    Full Text Available The advertisements prepare to the products they recommend a rich symbolic life. What symbolic breadth can be bestowed to a product? Do different product categories require differentsymbolic breadths? For some products, creatives want to eliminate every hesitation in the interpretation of the proposed meanings; for others, by the contrary, they propose blurred readings, content-nebulas (U. Eco.Advertising witnesses different symbolizing modes. The advertisements for fragrance prefer modes which, deploying content-nebulas, ask their readers to give several – and complex – interpretations. The paper presents an interpretation of an advertisement for Boucheron’s Jaïpur(the 1990s and proposes another.Keywords: symbolic relationship, positioning, values, icons

  3. Formalising Symbolic Interactionism

    NARCIS (Netherlands)

    de Nooy, W.

    2009-01-01

    Symbolic interactionism is generally known as a theory typically linked with a qualitative methodology. Recent developments in quantitative social network analysis, however, can analyze processes theorized within this theoretical tradition. Thick description can be complemented with statistical

  4. Glyph: Symbolic Regression Tools

    OpenAIRE

    Quade, Markus; Gout, Julien; Abel, Markus

    2018-01-01

    We present Glyph - a Python package for genetic programming based symbolic regression. Glyph is designed for usage let by numerical simulations let by real world experiments. For experimentalists, glyph-remote provides a separation of tasks: a ZeroMQ interface splits the genetic programming optimization task from the evaluation of an experimental (or numerical) run. Glyph can be accessed at http://github.com/ambrosys/glyph . Domain experts are be able to employ symbolic regression in their ex...

  5. 'demoted'?: Symbols as religious phenomena

    African Journals Online (AJOL)

    2013-03-06

    Mar 6, 2013 ... Religious symbols are part of our world, relating to another world. In order to understand the process by which symbols grow and develop, the particular context of a symbol is important. In this article a particular theory as to what symbols are, is presented. Religion presupposes the existence of two worlds: ...

  6. Symbol generators with program control

    International Nuclear Information System (INIS)

    Gryaznov, V.M.; Tomik, J.

    1974-01-01

    Methods of constructing symbol generators are described which ensure a program variation of symbol shape and setup. The symbols are formed on the basis of a point microraster. A symbol description code contains information on a symbol shape, with one digit corresponding to each microraster element. For a microraster discrete by-pass the description code is transformed into succession of illuminating pulses by means of a shift register

  7. SYMBOL LEVEL DECODING FOR DUO-BINARY TURBO CODES

    Directory of Open Access Journals (Sweden)

    Yogesh Beeharry

    2017-05-01

    Full Text Available This paper investigates the performance of three different symbol level decoding algorithms for Duo-Binary Turbo codes. Explicit details of the computations involved in the three decoding techniques, and a computational complexity analysis are given. Simulation results with different couple lengths, code-rates, and QPSK modulation reveal that the symbol level decoding with bit-level information outperforms the symbol level decoding by 0.1 dB on average in the error floor region. Moreover, a complexity analysis reveals that symbol level decoding with bit-level information reduces the decoding complexity by 19.6 % in terms of the total number of computations required for each half-iteration as compared to symbol level decoding.

  8. Multiple symbol differential detection

    Science.gov (United States)

    Divsalar, Dariush (Inventor); Simon, Marvin K. (Inventor)

    1991-01-01

    A differential detection technique for multiple phase shift keying (MPSK) signals is provided which uses a multiple symbol observation interval on the basis of which a joint decision is made regarding the phase of the received symbols. In accordance with the invention, a first difference phase is created between first and second received symbols. Next, the first difference phase is correlated with the possible values thereof to provide a first plurality of intermediate output signals. A second difference phase is next created between second and third received symbols. The second difference phase is correlated with plural possible values thereof to provide a second plurality of intermediate output signals. Next, a third difference phase is created between the first and third symbols. The third difference phase is correlated with plural possible values thereof to provide a third plurality of intermediate output signals. Each of the first plurality of intermediate outputs are combined with each of the second plurality of intermediate outputs and each of the third plurality of intermediate outputs to provide a plurality of possible output values. Finally, a joint decision is made by choosing from the plurality of possible output values the value which represents the best combined correlation of the first, second and third difference values with the possible values thereof.

  9. Influence of Colour on Acquisition and Generalisation of Graphic Symbols

    Science.gov (United States)

    Hetzroni, O. E.; Ne'eman, A.

    2013-01-01

    Background: Children with autism may benefit from using graphic symbols for their communication, language and literacy development. The purpose of this study was to investigate the influence of colour versus grey-scale displays on the identification of graphic symbols using a computer-based intervention. Method: An alternating treatment design was…

  10. Trauma and Symbolic Violence

    DEFF Research Database (Denmark)

    Pedersen, Bodil Maria

    2011-01-01

    - to praxis, and drawing on the concept of symbolic violence, this article contributes to their critique. In order to develop the analysis of difficulties victims may experience, they will be reconceptualised using critical psychological concepts such as 1st person perspectives and participation. The analysis...... seeks to undertake a discussion of personal meanings attributed to 'traumatisation'. It raises questions as to whether concepts of this kind and related practices may constitute symbolic violence and contribute to victimisation through looping-processes. Furthermore it aims at unfolding an understanding...... inclusive of connections between societal practices, aspects of symbolic violence, and the conduct of lives. The analysis is based on an empirical study of victimisation through rape and other forms of sexualised coercion. Key Words:...

  11. The symbolism of liminality

    Directory of Open Access Journals (Sweden)

    Juha Pentikäinen

    1979-01-01

    Full Text Available In this paper, the author discusses different understandings of the symbolism of liminality. According to Van Gennep’s definition, rites de passage are rites which accompany every change of place, state, social position and age. In primitive communities these changes are generally made public and their importance is hallowed by rites which follow a pattern. From the structural point of view, the liminal stage could also be regarded as a crucial phase in the sequence of the ritual drama. When rites of pas-sage are investigated as structured symbolic behaviour, it is also possible to find and isolate smaller units of analysis. Ritual behaviour is always the communication of the symbols which transmit some religious or other messages to the participants aware of their meanings.

  12. Cross-spectrum symbol synchronization

    Science.gov (United States)

    Mccallister, R. D.; Simon, M. K.

    1981-01-01

    A popular method of symbol synchronization exploits one aspect of generalized harmonic analysis, normally referred to as the cross-spectrum. Utilizing nonlinear techniques, the input symbol energy is effectively concentrated onto multiples of the symbol clock frequency, facilitating application of conventional phase lock synchronization techniques. A general treatment of the cross-spectrum technique is developed and shown to be applicable across a broad class of symbol modulation formats. An important specific symbol synchronization application is then treated, focusing the general development to provide both insight and quantitative measure of the performance impact associated with variation in these key synchronization parameters: symbol modulation format, symbol transition probability, symbol energy to noise density ratio, and symbol rate to filter bandwidth ratio.

  13. Symbolism in European Integration

    DEFF Research Database (Denmark)

    Manners, Ian

    2011-01-01

    Ernst Haas observed over fifty years ago that ‘United Europe' is a resilient, adaptable, unifying, and yet unspecified symbol'. It is precisely this adaptability and ambiguity that has ensures the continuing importance of European studies as a means of understanding ‘the remarkable social...... of social transformation involved' (Calhoun 2003: 18). This article will consider the role of symbolism in European integration as part of answering Craig Calhoun's call for a means of transcending specific regimes of analysis in order to advance European studies....

  14. JINGLE: THE SOUNDING SYMBOL

    Directory of Open Access Journals (Sweden)

    Bysko Maxim V.

    2013-12-01

    Full Text Available The article considers the role of jingles in the industrial era, from the occurrence of the regular radio broadcasting, sound films and television up of modern video games, audio and video podcasts, online broadcasts, and mobile communications. Jingles are researched from the point of view of the theory of symbols: the forward motion is detected in the process of development of jingles from the social symbols (radio callsigns to the individual signs-images (ringtones. The role of technical progress in the formation of jingles as important cultural audio elements of modern digital civilization.

  15. Symbolic Multidimensional Scaling

    NARCIS (Netherlands)

    P.J.F. Groenen (Patrick); Y. Terada

    2015-01-01

    markdownabstract__Abstract__ Multidimensional scaling (MDS) is a technique that visualizes dissimilarities between pairs of objects as distances between points in a low dimensional space. In symbolic MDS, a dissimilarity is not just a value but can represent an interval or even a histogram. Here,

  16. SYMBOLS IN PHARMACOKINETICS1

    Science.gov (United States)

    Rowland, Malcolm; Tucker, Geoffrey

    1982-01-01

    To encourage uniformity in the presentation of pharmacokinetic data, a general nomenclature has been developed. The system has wide application. Flexibility is achieved through the use of general variables, constants, qualifying terms and subscripts. Yet, through the use of implied terms, the symbols describing many common variables and constants are simple.

  17. Symbols in pharmacokinetics.

    Science.gov (United States)

    Rowland, M; Tucker, G

    1980-10-01

    To encourage uniformity in the presentation of pharmacokinetic data, a general nomenclature has been developed. The system has wide application. Flexibility is achieved through the use of general variables, constants, qualifying terms, and subscripts. Yet, through the use of implied terms, the symbols describing many common variables and constants are simple.

  18. Can symbols be 'promoted' or 'demoted'?: Symbols as religious ...

    African Journals Online (AJOL)

    Two examples are investigated so as to indicate how symbols can over time either be demoted or promoted. In the case of the Asherah and asherah as related in the Old Testament a demotion of a symbol is illustrated. The growth of ancient Egyptian religion is an example of a possible promotion of symbols. The conditions ...

  19. Bruce Springsteen as a symbol

    DEFF Research Database (Denmark)

    Gitz-Johansen, Thomas

    2018-01-01

    The article explores how Bruce Springsteen and his music function as a symbol. The article first presents the Jungian theory of symbols and of music as symbol. The central argument of the article is that, by functioning symbolically, Springsteen has the potential to influence the psyche of his...... audience and to function as a psychological resource. While no claim is made to cover the entire symbolic potential of Springsteen and his music, three central themes are identified and discussed: a symbol of containment and support, a symbol of a father figure, and symbolic support to an emerging...... masculine self. The evidence is drawn from statements made by his audience in currently available resources and from a series of dreams....

  20. Higher-Order and Symbolic Computation. LISP and Symbolic Computationditorial

    DEFF Research Database (Denmark)

    Danvy, Olivier; Dybvig, R. Kent; Lawall, Julia

    2008-01-01

    The present issue is composed of four contributed articles. In "Types and Trace Effects for Object Orientation," Christian Skalka investigates how to statically check properties of event traces (e.g., that a certain event always occurs until a certain program point is reached). He formalizes a ty...... for removing tuple constructions and tuple selections. This technique solves the problem of efficiently passing tuples to polymorphic functions by avoiding extra memory operations in selecting components of the tuple....

  1. The computer-based Symbol Digit Modalities Test: establishing age-expected performance in healthy controls and evaluation of pediatric MS patients.

    Science.gov (United States)

    Bigi, Sandra; Marrie, R A; Till, C; Yeh, E A; Akbar, N; Feinstein, A; Banwell, B L

    2017-04-01

    Decreased information processing speed (IPS) is frequently reported in pediatric multiple sclerosis (MS) patients. The computerized version of the Symbol Digit Modalities Test (c-SDMT) measures IPS over eight consecutive trials per session and additionally captures changes in performance within the session. Here, we establish normative c-SDMT performance and test-retest reliability in healthy children (HC) and explore differences in the overall c-SDMT-performance between HC and MS patients. This cross-sectional study included 478 HC (237 female, 49.5%) divided into five age groups (2 years each), and 27 MS patients (22 female, 81.5%) aged 8-18 years. The average time to complete the c-SDMT increased with age (|r| 0.70, 95% CI -0.74, -0.64). Test-retest reliability was high (ICC = 0.91) in HC. The total time to complete the c-SDMT did not differ between children with MS and sex- and age- matched HC (p = 0.23). However, MS patients were less likely to show faster performance across all the successive eight trials compared to HC (p = 0.0001). Healthy children demonstrate faster IPS with increasing age, as well as during successive trials of the c-SDMT. The inability of pediatric MS patients to maintain the increase in processing speed over successive trials suggests a reduced capacity for procedural learning, possibly resulting from cognitive fatigue.

  2. Real Time Decoding of Color Symbol for Optical Positioning System

    Directory of Open Access Journals (Sweden)

    Abdul Waheed Malik

    2015-01-01

    Full Text Available This paper presents the design and real-time decoding of a color symbol that can be used as a reference marker for optical navigation. The designed symbol has a circular shape and is printed on paper using two distinct colors. This pair of colors is selected based on the highest achievable signal to noise ratio. The symbol is designed to carry eight bit information. Real time decoding of this symbol is performed using a heterogeneous combination of Field Programmable Gate Array (FPGA and a microcontroller. An image sensor having a resolution of 1600 by 1200 pixels is used to capture images of symbols in complex backgrounds. Dynamic image segmentation, component labeling and feature extraction was performed on the FPGA. The region of interest was further computed from the extracted features. Feature data belonging to the symbol was sent from the FPGA to the microcontroller. Image processing tasks are partitioned between the FPGA and microcontroller based on data intensity. Experiments were performed to verify the rotational independence of the symbols. The maximum distance between camera and symbol allowing for correct detection and decoding was analyzed. Experiments were also performed to analyze the number of generated image components and sub-pixel precision versus different light sources and intensities. The proposed hardware architecture can process up to 55 frames per second for accurate detection and decoding of symbols at two Megapixels resolution. The power consumption of the complete system is 342mw.

  3. Comparison of Pilot Symbol Embedded Channel Estimation Algorithms

    Directory of Open Access Journals (Sweden)

    P. Kadlec

    2009-12-01

    Full Text Available In the paper, algorithms of the pilot symbol embedded channel estimation are compared. Attention is turned to the Least Square (LS channel estimation and the Sliding Correlator (SC algorithm. Both algorithms are implemented in Matlab to estimate the Channel Impulse Response (CIR of a channel exhibiting multi-path propagation. Algorithms are compared from the viewpoint of computational demands, influence of the Additive White Gaussian Noise (AWGN, an embedded pilot symbol and a computed CIR over the estimation error.

  4. Lisbon Symbol Database (LSD): Subjective norms for 600 symbols.

    Science.gov (United States)

    Prada, Marília; Rodrigues, David; Silva, Rita R; Garrido, Margarida V

    2016-12-01

    This article presents subjective rating norms for a new set of 600 symbols, depicting various contents (e.g., transportation, technology, and leisure activities) that can be used by researchers in different fields. Symbols were evaluated for aesthetic appeal, familiarity, visual complexity, concreteness, valence, arousal, and meaningfulness. The normative data were obtained from 388 participants, and no gender differences were found. Descriptive results (means, standard deviations, and confidence intervals) for each symbol in each dimension are presented. Overall, the dimensions were highly correlated. Additionally, participants were asked to briefly describe the meaning of each symbol. The results indicate that the present symbol set is varied, allowing for the selection of exemplars with different levels on the seven examined dimensions. This set of symbols constitutes a tool with potential for research in different areas. The database with all of the symbols is available as supplemental materials.

  5. HMD symbol stabilization concepts

    Science.gov (United States)

    Newman, Richard L.; Greeley, Kevin W.

    1995-05-01

    Helmet-mounted displays (HMDs) present flight, navigation, and weapon information in the pilot's line of sight. The HMD was developed to allow the pilot to retain aircraft and weapon information while looking off boresight. Symbol stabilization is a key issue for HMDs. In current equipment, the lack of compensation for pilot head motion creates excessive workload during hovering and nap-of-the-earth flight. This high workload translates into excessive training requirements. At the same time, misleading symbology makes interpretation of the height of obstructions impossible. A set of standardized coordinate transformations are necessary for the development of HMD symbology and the control laws. Part of the problem is there is no agreed upon set of definitions or descriptions for how HMD symbols are driven to compensate for pilot head motion. A candidate set of coordinate definitions is proposed to address this issue.

  6. Symbolic Violence and Victimisation

    DEFF Research Database (Denmark)

    Pedersen, Bodil Maria

    2009-01-01

    Nay (1999). It also undertakes a critical discussion of symbolic violence in the meanings given to victimisation and its aftermaths, as when conceptualised with the help of PTSD (e.g. may the use of concepts of this kind and the practices developed in relation to it constitute symbolic violence...... the ways we understand and classify behavioural, emotional and cognitive processes, such as gendered practices, to social fields of practice, and points to the consequences of not doing so. In order to develop the analysis of concrete difficulties victims experience Bourdieu's concept will be supplemented...... on the personal and social meanings of  "trauma" developed in an empirical research project on the aftermaths of victimisation through rape and other forms of sexualised coercion...

  7. Trauma and Symbolic Violence

    DEFF Research Database (Denmark)

    Pedersen, Bodil Maria

    2011-01-01

    Our understanding of 'reactions to trauma' is dominated by concepts like Post-Traumatic Stress Disorder. The use of such concepts has been criticised but simultaneously integrated in folk-psychology. Connecting emotional and cognitive processes as well as acts - such as in gendered practices - to...... inclusive of connections between societal practices, aspects of symbolic violence, and the conduct of lives. The analysis is based on an empirical study of victimisation through rape and other forms of sexualised coercion....

  8. Symbol Formation Reconsidered

    DEFF Research Database (Denmark)

    Wagoner, Brady

    2013-01-01

    begins with a brief outline and contextualization of the book as well as of the articles that this special issue comprises. The first two articles were written by contributors who were part of the Werner era at Clark University. They explore the key concepts of the organismic and development, and situate...... the organismic-developmental approach to fields only touched in Symbol formation, such as magical practices, social structures, pictures and gesture....

  9. Formalising Symbolic Interactionism

    OpenAIRE

    de Nooy, W.

    2009-01-01

    Symbolic interactionism is generally known as a theory typically linked with a qualitative methodology. Recent developments in quantitative social network analysis, however, can analyze processes theorized within this theoretical tradition. Thick description can be complemented with statistical analyses of network structure and dynamics, expanding the scope and detail of results. This paper argues that social network analysis can bridge the divide between qualitative and quantitative analysis...

  10. Political symbols and political transitions

    Directory of Open Access Journals (Sweden)

    Herrero de Miñón, Miguel

    2006-11-01

    Full Text Available Politics, Law and Psychology are fields that come together in the symbolic. This text takes evidence from those three areas to develop an analysis of political symbols and political transitions. The development of the analysis goes through three stages. The first succinctly describes the concept of transition and its meaning. The second closely examines the notion of the symbol, in terms of its definition, to explain aspects that allow us to understand it, characterise it and make its functions clear. Finally, from the author's experience as a witness and as an actor, I suggest three ways of understanding symbols in the processes of political transition: as symbols of change, as symbols of acknowledgment, and as symbols of support.

  11. Carrier tracking by smoothing filter improves symbol SNR

    Science.gov (United States)

    Pomalaza-Raez, Carlos A.; Hurd, William J.

    1986-01-01

    The potential benefit of using a smoothing filter to estimate carrier phase over use of phase locked loops (PLL) is determined. Numerical results are presented for the performance of three possible configurations of the deep space network advanced receiver. These are residual carrier PLL, sideband aided residual carrier PLL, and finally sideband aiding with a Kalman smoother. The average symbol signal to noise ratio (SNR) after losses due to carrier phase estimation error is computed for different total power SNRs, symbol rates and symbol SNRs. It is found that smoothing is most beneficial for low symbol SNRs and low symbol rates. Smoothing gains up to 0.4 dB over a sideband aided residual carrier PLL, and the combined benefit of smoothing and sideband aiding relative to a residual carrier loop is often in excess of 1 dB.

  12. Carrier tracking by smoothing filter can improve symbol SNR

    Science.gov (United States)

    Hurd, W. J.; Pomalaza-Raez, C. A.

    1985-01-01

    The potential benefit of using a smoothing filter to estimate carrier phase over use of phase locked loops (PLL) is determined. Numerical results are presented for the performance of three possible configurations of the deep space network advanced receiver. These are residual carrier PLL, sideband aided residual carrier PLL, and finally sideband aiding with a Kalman smoother. The average symbol signal to noise ratio (CNR) after losses due to carrier phase estimation error is computed for different total power SNRs, symbol rates and symbol SNRs. It is found that smoothing is most beneficial for low symbol SNRs and low symbol rates. Smoothing gains up to 0.4 dB over a sideband aided residual carrier PLL, and the combined benefit of smoothing and sideband aiding relative to a residual carrier loop is often in excess of 1 dB.

  13. Scene understanding based on network-symbolic models

    Science.gov (United States)

    Kuvich, Gary

    2005-05-01

    New generations of smart weapons and unmanned vehicles must have reliable perceptual systems that are similar to human vision. Instead of precise computations of 3-dimensional models, a network-symbolic system converts image information into an "understandable" Network-Symbolic format, which is similar to relational knowledge models. Logic of visual scenes can be captured in the Network-Symbolic models and used for the disambiguation of visual information. It is hard to use geometric operations for processing of natural images. Instead, the brain builds a relational network-symbolic structure of visual scene, using different clues to set up the relational order of surfaces and objects. Feature, symbol, and predicate are equivalent in the biologically inspired Network-Symbolic systems. A linking mechanism binds these features/symbols into coherent structures, and image converts from a "raster" into a "vector" representation that can be better interpreted by higher-level knowledge structures. View-based object recognition is a hard problem for traditional algorithms that directly match a primary view of an object to a model. In Network-Symbolic Models, the derived structure, not the primary view, is a subject for recognition. Such recognition is not affected by local changes and appearances of the object as seen from a set of similar views.

  14. Emergent latent symbol systems in recurrent neural networks

    Science.gov (United States)

    Monner, Derek; Reggia, James A.

    2012-12-01

    Fodor and Pylyshyn [(1988). Connectionism and cognitive architecture: A critical analysis. Cognition, 28(1-2), 3-71] famously argued that neural networks cannot behave systematically short of implementing a combinatorial symbol system. A recent response from Frank et al. [(2009). Connectionist semantic systematicity. Cognition, 110(3), 358-379] claimed to have trained a neural network to behave systematically without implementing a symbol system and without any in-built predisposition towards combinatorial representations. We believe systems like theirs may in fact implement a symbol system on a deeper and more interesting level: one where the symbols are latent - not visible at the level of network structure. In order to illustrate this possibility, we demonstrate our own recurrent neural network that learns to understand sentence-level language in terms of a scene. We demonstrate our model's learned understanding by testing it on novel sentences and scenes. By paring down our model into an architecturally minimal version, we demonstrate how it supports combinatorial computation over distributed representations by using the associative memory operations of Vector Symbolic Architectures. Knowledge of the model's memory scheme gives us tools to explain its errors and construct superior future models. We show how the model designs and manipulates a latent symbol system in which the combinatorial symbols are patterns of activation distributed across the layers of a neural network, instantiating a hybrid of classical symbolic and connectionist representations that combines advantages of both.

  15. Fuzzy Intervals for Designing Structural Signature: An Application to Graphic Symbol Recognition

    Science.gov (United States)

    Luqman, Muhammad Muzzamil; Delalandre, Mathieu; Brouard, Thierry; Ramel, Jean-Yves; Lladós, Josep

    The motivation behind our work is to present a new methodology for symbol recognition. The proposed method employs a structural approach for representing visual associations in symbols and a statistical classifier for recognition. We vectorize a graphic symbol, encode its topological and geometrical information by an attributed relational graph and compute a signature from this structural graph. We have addressed the sensitivity of structural representations to noise, by using data adapted fuzzy intervals. The joint probability distribution of signatures is encoded by a Bayesian network, which serves as a mechanism for pruning irrelevant features and choosing a subset of interesting features from structural signatures of underlying symbol set. The Bayesian network is deployed in a supervised learning scenario for recognizing query symbols. The method has been evaluated for robustness against degradations & deformations on pre-segmented 2D linear architectural & electronic symbols from GREC databases, and for its recognition abilities on symbols with context noise i.e. cropped symbols.

  16. Symbolic Reasoning for Hearthstone

    OpenAIRE

    Stiegler, Andreas; Dahal, Keshav; Maucher, Johannes; Livingstone, Daniel

    2017-01-01

    Trading-Card-Games are an interesting problem domain for Game AI, as they feature some challenges, such as highly variable game mechanics, that are not encountered in this intensity in many other genres. We present an expert system forming a player-level AI for the digital Trading-Card-Game Hearthstone. The bot uses a symbolic approach with a semantic structure, acting as an ontology, to represent both static descriptions of the game mechanics and dynamic game-state memories. Methods are intr...

  17. Mathematical symbol hypothesis recognition with rejection option

    OpenAIRE

    Julca-Aguilar , Frank; Hirata , Nina ,; Viard-Gaudin , Christian; Mouchère , Harold; Medjkoune , Sofiane

    2014-01-01

    International audience; In the context of handwritten mathematical expressions recognition, a first step consist on grouping strokes (segmentation) to form symbol hypotheses: groups of strokes that might represent a symbol. Then, the symbol recognition step needs to cope with the identification of wrong segmented symbols (false hypotheses). However, previous works on symbol recognition consider only correctly segmented symbols. In this work, we focus on the problem of mathematical symbol reco...

  18. Shanahan on symbolization.

    Science.gov (United States)

    Lassègue, Jean

    2008-03-01

    In his article 'A New View of Language, Emotion and the Brain,' Dan Shanahan claims that the post-war Cognitive Turn focused mainly on information processing and that little attention was paid to the dramatic role played by emotion in human cognition. One key argument in his defence of a more comprehensive view of human cognition rests upon the idea that the process of symbolization--a unique capacity only developed by humans--combines, right from the start, information processing and feelings. The author argues that any theory ignoring this fact would miss the whole point, just as mainstream cognitive science has done since Noam Chomsky published Syntactic Structures, exactly 50 years ago.

  19. Symbolic Time Separation of Events

    DEFF Research Database (Denmark)

    Amon, Tod; Hulgaard, Henrik

    1999-01-01

    We extend the TSE~\\cite{Hulgaard95} timing analysis algorithm into the symbolic domain, that is, we allow symbolic variables to be used to specify unknown parameters of the model (essentially, unknown delays) and verification algorithms which are capable of identifying not just failure or success...

  20. Grounding compositional symbols: no composition without discrimination.

    Science.gov (United States)

    Greco, Alberto; Carrea, Elena

    2012-05-01

    The classical computational conception of meaning has been challenged by the idea that symbols must be grounded on sensorimotor processes. A difficult question arises from the fact that grounding representations cannot be symbolic themselves but, in order to support compositionality, should work as primitives. This implies that they should be precisely identifiable and strictly connected with discriminable perceptual features. Ideally, each representation should correspond to a single discriminable feature. The present study was aimed at exploring whether feature discrimination is a fundamental requisite for grounding compositional symbols. We studied this problem by using Integral stimuli, composed of two interacting and not separable features. Such stimuli were selected in Experiment 1 as pictures whose component features are easily or barely discriminable (Separable or Integral) on the basis of psychological distance metrics (City-block or Euclidean) computed from similarity judgments. In Experiment 2, either each feature was associated with one word of a two-word expression, or the whole stimulus with a single word. In Experiment 3, the procedure was reversed and words or expressions were associated with whole pictures or separate features. Results support the hypothesis that single words are best grounded by Integral stimuli and composite expressions by Separable stimuli, where a strict association of single words with discriminated features is possible.

  1. Symbolic PathFinder: Symbolic Execution of Java Bytecode

    Science.gov (United States)

    Pasareanu, Corina S.; Rungta, Neha

    2010-01-01

    Symbolic Pathfinder (SPF) combines symbolic execution with model checking and constraint solving for automated test case generation and error detection in Java programs with unspecified inputs. In this tool, programs are executed on symbolic inputs representing multiple concrete inputs. Values of variables are represented as constraints generated from the analysis of Java bytecode. The constraints are solved using off-the shelf solvers to generate test inputs guaranteed to achieve complex coverage criteria. SPF has been used successfully at NASA, in academia, and in industry.

  2. Localisation de symboles dans les documents graphiques

    OpenAIRE

    Nguyen , Thi Oanh

    2009-01-01

    This thesis addresses the complex problem of symbol spotting in graphical documents where symbols are not segmented a priori. Many works have been proposed to define good descriptors for isolated symbol representation. However, they cannot be directly used to locate symbols in documents because of the recognition/segmentation paradox : to recognise symbols, documents should be segmented first and vice versa, to well segment documents its content (symbols) should be recognised in advance. In t...

  3. Symbols of Creation

    Directory of Open Access Journals (Sweden)

    Nadeshda Komarowa

    2006-03-01

    Full Text Available Spatial arts, including sculpture, exist in the material sphere of culture and model the spatial aspects of the universe by themselves…Dmitri Budazhabe's sculpture appeared to link the epochs of the old oriental cultures to the modern life. His works are decorative objects and at the same time the rite symbols, which contain deep aspects of the Buddhism.The sculptures and vessels for incense bravely model the interior space and simultaneously play a leading part in it. They are maid artistically and first of all evoke peaceful feelings. The small steam of the incense smoke, coming out of special channels, continues to create the environment even beyond the vessel, involving the observer in the rite. The oriental images invite us to make philosophical conclusions and to search for eternal truth…Dmitri Budazhabe's works are performed in bronze moulding.Together with exotic forms, each sculpture has particular meaning. Thus the names sound lyrical and romantic: «The Treasure that Fulfils Wishes», «Sarasvati (The Goddess of the Morning Star», «The Warrior of Shambala» etc. Flexible sculptural bodies, plastic compositional decor and fleshy bulging forms recall melodies of the mysterious East and the eternal secret of the hidden symbols, that one's curious mind aspires to reveal.Dmitri Budazhabe's works are often designed for Buddhist temples, made by special request and used for rites. At the moment the author is finishing the work, which he considers to be of great moral importance: it is a 2 meter sculpture of Buddha for Dazan. When watching his work the sense of time disappears… There is no past; presence merges with future–only Aspiration for perfection moves the author's hands.

  4. A Comparative Study : Microprogrammed Vs Risc Architectures For Symbolic Processing

    Science.gov (United States)

    Heudin, J. C.; Metivier, C.; Demigny, D.; Maurin, T.; Zavidovique, B.; Devos, F.

    1987-05-01

    It is oftenclaimed that conventional computers are not well suited for human-like tasks : Vision (Image Processing), Intelligence (Symbolic Processing) ... In the particular case of Artificial Intelligence, dynamic type-checking is one example of basic task that must be improved. The solution implemented in most Lisp work-stations consists in a microprogrammed architecture with a tagged memory. Another way to gain efficiency is to design a well suited instruction set for symbolic processing, which reduces the semantic gap between the high level language and the machine code. In this framework, the RISC concept provides a convenient approach to study new architectures for symbolic processing. This paper compares both approaches and describes our projectof designing a compact symbolic processor for Artificial Intelligence applications.

  5. Exact and approximate probabilistic symbolic execution for nondeterministic programs

    DEFF Research Database (Denmark)

    Luckow, Kasper Søe; Păsăreanu, Corina S.; Dwyer, Matthew B.

    2014-01-01

    introduce approximate algorithms to search for good schedulers, speeding up established random sampling and reinforcement learning results through the quantification of path probabilities based on symbolic execution. We implemented the techniques in Symbolic PathFinder and evaluated them on nondeterministic......Probabilistic software analysis seeks to quantify the likelihood of reaching a target event under uncertain environments. Recent approaches compute probabilities of execution paths using symbolic execution, but do not support nondeterminism. Nondeterminism arises naturally when no suitable...... probabilistic model can capture a program behavior, e.g., for multithreading or distributed systems. In this work, we propose a technique, based on symbolic execution, to synthesize schedulers that resolve nondeterminism to maximize the probability of reaching a target event. To scale to large systems, we also...

  6. Social Symbolic Work in Context

    DEFF Research Database (Denmark)

    Brincker, Benedikte

    This paper reports on a research project that explores social symbolic work. The social symbolic work in question seeks to introduce education in entrepreneurship into the school curriculum in a remote part of Greenland – in order to contribute to regional development. The paper investigates how...... ‘the good organisation’ may offer a supportive organisational framework for social symbolic work, thus promoting regional development in peripheral and poorly developed regions. Exploring what qualifies as a ‘good organisation’, the paper identifies three key elements: management, motivation...

  7. Symbolic Time Separation of Events

    DEFF Research Database (Denmark)

    Amon, Tod; Hulgaard, Henrik

    1999-01-01

    We extend the TSE~\\cite{Hulgaard95} timing analysis algorithm into the symbolic domain, that is, we allow symbolic variables to be used to specify unknown parameters of the model (essentially, unknown delays) and verification algorithms which are capable of identifying not just failure or success...... minimizations and maximizations defined for a given domain. We report experimental results for several asynchronous circuits to demonstrate that symbolic analysis is feasible and that the output provided is what a designer (or perhaps a synthesis tool) would often want to know....

  8. Liturgical singing as ritual symbol

    OpenAIRE

    Coenie Calitz

    2011-01-01

    Liturgical singing is more than text and melody; it is also symbol and ritual. It is part of the ensemble of rituals within the worship service. As a ritual symbol, it is closely connected to the culture or subculture where it is conducted. Meaning is not only immanent in the text (lyrics), but assigned on a continuous base and differs from culture to culture. As a ritual symbol, liturgical singing does not only point to another reality, but presents the other reality within the cultural cont...

  9. Long-Term Symbolic Learning

    National Research Council Canada - National Science Library

    Kennedy, William G; Trafton, J. G

    2007-01-01

    What are the characteristics of long-term learning? We investigated the characteristics of long-term, symbolic learning using the Soar and ACT-R cognitive architectures running cognitive models of two simple tasks...

  10. Abstract Expression Grammar Symbolic Regression

    Science.gov (United States)

    Korns, Michael F.

    This chapter examines the use of Abstract Expression Grammars to perform the entire Symbolic Regression process without the use of Genetic Programming per se. The techniques explored produce a symbolic regression engine which has absolutely no bloat, which allows total user control of the search space and output formulas, which is faster, and more accurate than the engines produced in our previous papers using Genetic Programming. The genome is an all vector structure with four chromosomes plus additional epigenetic and constraint vectors, allowing total user control of the search space and the final output formulas. A combination of specialized compiler techniques, genetic algorithms, particle swarm, aged layered populations, plus discrete and continuous differential evolution are used to produce an improved symbolic regression sytem. Nine base test cases, from the literature, are used to test the improvement in speed and accuracy. The improved results indicate that these techniques move us a big step closer toward future industrial strength symbolic regression systems.

  11. Liturgical singing as ritual symbol

    Directory of Open Access Journals (Sweden)

    Coenie Calitz

    2011-03-01

    Full Text Available Liturgical singing is more than text and melody; it is also symbol and ritual. It is part of the ensemble of rituals within the worship service. As a ritual symbol, it is closely connected to the culture or subculture where it is conducted. Meaning is not only immanent in the text (lyrics, but assigned on a continuous base and differs from culture to culture. As a ritual symbol, liturgical singing does not only point to another reality, but presents the other reality within the cultural context of the worship service; within ritual the music and melody are more important than text and lyrics. Liturgical singing as a ritual symbol is never static, but in a continuous process of change.

  12. Higher-Order and Symbolic Computation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Mason, Ian

    2008-01-01

    a series of implementaions that properly account for multiple invocations of the derivative-taking opeatro. In "Adapting Functional Programs to Higher-Order Logic," Scott Owens and Konrad Slind present a variety of examples of terminiation proofs of functional programs written in HOL proof systems. Since...... HOL is a logic of total functions, one must explicitly address the termination of functions that are not primitive recursive. In "Flow-sensitive Type Systems and the Ambient Calculus," Torben Amtoft reports on what apperar to be the first type-based flow-sensitive topological analysis of ambient-calculus...

  13. PARADIGM FOR CONTEMPORARY SYMBOLIC REALITY

    Directory of Open Access Journals (Sweden)

    Elena Korableva

    2013-12-01

    Full Text Available Objective: Civilization development in its concrete historical specificity is embodied in symbolic forms that require interpretation and understanding of its meaning. Info communication symbolic reality sets new parameters of self-determination rights, creates a new type of information behavior. Adequate entry into the modern social context requires analysis of the basic concepts of symbolic reality of human existence, and its contemporary sound. The dialectical materialist methodology allows us to investigate human immersion in contradictive meanings of the era, the skills of interaction with the increased flow of information, the ability to determine information needs and use this information right way as well as the ability to analyze this information. Scientific novelty is reflected in axiological evolutionary approach to the analysis of reproduction in the sign and symbol of the spiritual and the practical forms of human multidimensional realities of their existence in their specific historical context. Conclusions: 1 Persons' immersion into the space of cultural and historical symbolic processes determines the content of their socialization which is a process of self-identification in the symbolic reality, the process of entering the subject-shaped field of human culture; 2 An adequate model of signs and symbols reflects the diversity of information flows, that is the synthesis of a specific objective and true knowledge, its interpretation and value. Herewith, a lot of interpretations, pluralism and diversity of axiological points of view to understanding objective reality are obvious; 3 The use of signs becomes like a code or the language for communication between people. The interpretation of clip-culture determines the adequacy and efficiency of action based on the identified meanings and values of diverse information and communication symbolic reality.

  14. Fuzzy Intervals for Designing Structural Signature: An Application to Graphic Symbol Recognition

    OpenAIRE

    Luqman , Muhammad Muzzamil; Delalandre , Mathieu; Brouard , Thierry; Ramel , Jean-Yves; Lladós , Josep

    2010-01-01

    Revised selected papers from Eighth IAPR International Workshop on Graphics RECognition (GREC) 2009.; The motivation behind our work is to present a new methodology for symbol recognition. The proposed method employs a structural approach for representing visual associations in symbols and a statistical classifier for recognition. We vectorize a graphic symbol, encode its topological and geometrical information by an attributed relational graph and compute a signature from this structural gra...

  15. Symbolic reasoning about myocardial scintigrams in PROLOG

    Energy Technology Data Exchange (ETDEWEB)

    Rosenberg, S.; Itti, R.; Benjelloun, L.

    1986-06-01

    PROLOG (PROgramming in LOGic) is the declarative programming language at the heart of the Japanese fifth-generation computer project. It is proposed that PROLOG is a suitable tool for symbolic image processing, once standard preprocessing has been done. In the present application, the problem of prediction of coronary anatomy from myocardial scintigrams is addressed. Uncertainty is dealt with by a combination of fuzzy-set theoretic and probabilistic reasoning. Heuristic classification rules are based on clinical experience and on a set of 247 myocardial scintigrams with their corresponding coronary angiograms.

  16. Optical symbolic processor for expert system execution

    Science.gov (United States)

    Guha, Aloke

    1987-11-01

    The goal of this program is to develop a concept for an optical computer architecture for symbolic computing by defining a computation model of a high level language, examining the possible devices for the ultimate construction of a processor, and by defining required optical operations. This quarter we investigated the implementation alternatives for an optical shuffle exchange network (SEN). Work in previous quarter had led to the conclusion that the SEN was most appropriate optical interconnection network topology for the symbolic processing architecture (SPARO). A more detailed analysis was therefore conducted to examine implementation possibilities. It was determined that while the shuffle connection of the SEN was very feasible in optics using passive devices, a full-scale exchange switch which handles conflict resolution among competing messages is much more difficult. More emphasis was therefore given to the exchange switch design. The functionalities required for the exchange switch and its controls were analyzed. These functionalities were then assessed for optical implementation. It is clear that even the basic exchange switch, that is, an exchange without the controls for conflict resolution, delivery, etc..., is quite a difficult problem in optics. We have proposed a number of optical techniques that appear to be good candidates for realizing the basic exchange switch. A reasonable approach appears to be to evaluate these techniques.

  17. Symbol synchronization in convolutionally coded systems

    Science.gov (United States)

    Baumert, L. D.; Mceliece, R. J.; Van Tilborg, H. C. A.

    1979-01-01

    Alternate symbol inversion is sometimes applied to the output of convolutional encoders to guarantee sufficient richness of symbol transition for the receiver symbol synchronizer. A bound is given for the length of the transition-free symbol stream in such systems, and those convolutional codes are characterized in which arbitrarily long transition free runs occur.

  18. 7 CFR 29.1008 - Combination symbols.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Combination symbols. 29.1008 Section 29.1008..., 13, 14 and Foreign Type 92) § 29.1008 Combination symbols. A color or group symbol used with another symbol to form the third factor of a grademark to denote a particular side or characteristic of the...

  19. 22 CFR 42.11 - Classification symbols.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Classification symbols. 42.11 Section 42.11... NATIONALITY ACT, AS AMENDED Classification and Foreign State Chargeability § 42.11 Classification symbols. A... visa symbol to show the classification of the alien. Immigrants Symbol Class Section of law Immediate...

  20. Fast Multi-Symbol Based Iterative Detectors for UWB Communications

    Directory of Open Access Journals (Sweden)

    Lottici Vincenzo

    2010-01-01

    Full Text Available Ultra-wideband (UWB impulse radios have shown great potential in wireless local area networks for localization, coexistence with other services, and low probability of interception and detection. However, low transmission power and high multipath effect make the detection of UWB signals challenging. Recently, multi-symbol based detection has caught attention for UWB communications because it provides good performance and does not require explicit channel estimation. Most of the existing multi-symbol based methods incur a higher computational cost than can be afforded in the envisioned UWB systems. In this paper, we propose an iterative multi-symbol based method that has low complexity and provides near optimal performance. Our method uses only one initial symbol to start and applies a decision directed approach to iteratively update a filter template and information symbols. Simulations show that our method converges in only a few iterations (less than 5, and that when the number of symbols increases, the performance of our method approaches that of the ideal Rake receiver.

  1. Symbol Synchronization for Diffusion-Based Molecular Communications.

    Science.gov (United States)

    Jamali, Vahid; Ahmadzadeh, Arman; Schober, Robert

    2017-12-01

    Symbol synchronization refers to the estimation of the start of a symbol interval and is needed for reliable detection. In this paper, we develop several symbol synchronization schemes for molecular communication (MC) systems where we consider some practical challenges, which have not been addressed in the literature yet. In particular, we take into account that in MC systems, the transmitter may not be equipped with an internal clock and may not be able to emit molecules with a fixed release frequency. Such restrictions hold for practical nanotransmitters, e.g., modified cells, where the lengths of the symbol intervals may vary due to the inherent randomness in the availability of food and energy for molecule generation, the process for molecule production, and the release process. To address this issue, we develop two synchronization-detection frameworks which both employ two types of molecule. In the first framework, one type of molecule is used for symbol synchronization and the other one is used for data detection, whereas in the second framework, both types of molecule are used for joint symbol synchronization and data detection. For both frameworks, we first derive the optimal maximum likelihood (ML) symbol synchronization schemes as performance upper bounds. Since ML synchronization entails high complexity, for each framework, we also propose three low-complexity suboptimal schemes, namely a linear filter-based scheme, a peak observation-based scheme, and a threshold-trigger scheme, which are suitable for MC systems with limited computational capabilities. Furthermore, we study the relative complexity and the constraints associated with the proposed schemes and the impact of the insertion and deletion errors that arise due to imperfect synchronization. Our simulation results reveal the effectiveness of the proposed synchronization schemes and suggest that the end-to-end performance of MC systems significantly depends on the accuracy of the symbol

  2. How to Create Shared Symbols.

    Science.gov (United States)

    Fay, Nicolas; Walker, Bradley; Swoboda, Nik; Garrod, Simon

    2018-02-19

    Human cognition and behavior are dominated by symbol use. This paper examines the social learning strategies that give rise to symbolic communication. Experiment 1 contrasts an individual-level account, based on observational learning and cognitive bias, with an inter-individual account, based on social coordinative learning. Participants played a referential communication game in which they tried to communicate a range of recurring meanings to a partner by drawing, but without using their conventional language. Individual-level learning, via observation and cognitive bias, was sufficient to produce signs that became increasingly effective, efficient, and shared over games. However, breaking a referential precedent eliminated these benefits. The most effective, most efficient, and most shared signs arose when participants could directly interact with their partner, indicating that social coordinative learning is important to the creation of shared symbols. Experiment 2 investigated the contribution of two distinct aspects of social interaction: behavior alignment and concurrent partner feedback. Each played a complementary role in the creation of shared symbols: Behavior alignment primarily drove communication effectiveness, and partner feedback primarily drove the efficiency of the evolved signs. In conclusion, inter-individual social coordinative learning is important to the evolution of effective, efficient, and shared symbols. Copyright © 2018 Cognitive Science Society, Inc.

  3. The symbolic economy of drugs.

    Science.gov (United States)

    Lentacker, Antoine

    2016-02-01

    This essay reviews four recent studies representing a new direction in the history of pharmaceuticals and pharmaceutical science. To this end, it introduces the notion of a symbolic economy of drugs, defined as the production, circulation, and reception of signs that convey information about drugs and establish trust in them. Each of the studies under review focuses on one key signifier in this symbolic economy, namely the brand, the patent, the clinical trial, and the drug itself. Drawing on Pierre Bourdieu's theory of the economy of symbolic goods, I conceptualize these signifiers as symbolic assets, that is, as instruments of communication and credit, delivering knowledge, carrying value, and producing authority. The notion of a symbolic economy is offered with a threefold intention. First, I introduce it in order to highlight the implications of historical and anthropological work for a broader theory of the economy of drugs, thus suggesting a language for interdisciplinary conversations in the study of pharmaceuticals. Second, I deploy it in an attempt to emphasize the contributions of the recent scholarship on drugs to a critical understanding of our own contemporary ways of organizing access to drugs and information about drugs. Finally, I suggest ways in which it might be of use to scholars of other commodities and technologies.

  4. Low complexity symbol-wise beamforming for MIMO-OFDM systems

    KAUST Repository

    Lee, Hyun Ho

    2011-12-01

    In this paper, we consider a low complexity symbol-wise beamforming for MIMO-OFDM systems. We propose a non-iterative algorithm for the symbol-wise beamforming, which can provide the performance approaching that of the conventional symbol-wise beamforming based on the iterative algorithm. We demonstrate that our proposed scheme can reduce the computational complexity significantly. From our simulation results, it is evident that our proposed scheme leads to a negligible performance loss compared to the conventional symbol-wise beamforming regardless of spatial correlation or presence of co-channel interference. © 2011 IEEE.

  5. A Survey of New Trends in Symbolic Execution for Software Testing and Analysis

    Science.gov (United States)

    Pasareanu, Corina S.; Visser, Willem

    2009-01-01

    Symbolic execution is a well-known program analysis technique which represents values of program inputs with symbolic values instead of concrete (initialized) data and executes the program by manipulating program expressions involving the symbolic values. Symbolic execution has been proposed over three decades ago but recently it has found renewed interest in the research community, due in part to the progress in decision procedures, availability of powerful computers and new algorithmic developments. We provide a survey of some of the new research trends in symbolic execution, with particular emphasis on applications to test generation and program analysis. We first describe an approach that handles complex programming constructs such as input data structures, arrays, as well as multi-threading. We follow with a discussion of abstraction techniques that can be used to limit the (possibly infinite) number of symbolic configurations that need to be analyzed for the symbolic execution of looping programs. Furthermore, we describe recent hybrid techniques that combine concrete and symbolic execution to overcome some of the inherent limitations of symbolic execution, such as handling native code or availability of decision procedures for the application domain. Finally, we give a short survey of interesting new applications, such as predictive testing, invariant inference, program repair, analysis of parallel numerical programs and differential symbolic execution.

  6. Symbol-by-symbol maximum likelihood (ML) detection with reduced complexity over multicarrier systems

    Science.gov (United States)

    Tsai, Shang-Ho; Yu, Xiaoli; Kuo, C.-C. J.

    2004-08-01

    A symbol-by-symbol maximum likelihood (ML) detection scheme for multicarrier (MC) systems is proposed in this work. When the number of subchannels is sufficiently large, the received symbols across all subchannels are approximately uncorrelated. Then, the proposed symbol-by-symbol ML detection, which is obtained by minimizing the symbol error probability, is nearly optimal. Furthermore, we will show how to reduce the complexity of the symbol-by-symbol ML detection when the constellation size is large. Simulation results show that the proposed symbol-by-symbol ML detection scheme outperforms the symbol-by-symbol minimum distance (MD) detection scheme by up to 2 dB in a noisy environment with crosstalk such as the DMT-ADSL system.

  7. Symbolic manipulation methods in general relativity and fluid mechanics

    International Nuclear Information System (INIS)

    Cohen, I.

    1976-03-01

    Algebraic manipulation by computer, or automatic symbol manipulation (ASM) has not been used much in theoretical physics, especially if one compares it with numerical methods. Three examples of the use of ASM as a tool in theoretical physics are discussed. (Auth.)

  8. On the Symbolic Verification of Timed Systems

    DEFF Research Database (Denmark)

    Moeller, Jesper; Lichtenberg, Jacob; Andersen, Henrik Reif

    1999-01-01

    This paper describes how to analyze a timed system symbolically. That is, given a symbolic representation of a set of (timed) states (as an expression), we describe how to determine an expression that represents the set of states that can be reached either by firing a discrete transition...... or by advancing time. These operations are used to determine the set of reachable states symbolically. We also show how to symbolically determine the set of states that can reach a given set of states (i.e., a backwards step), thus making it possible to verify TCTL-formulae symbolically. The analysis is fully...... symbolic in the sense that both the discrete and the continuous part of the state space are represented symbolically. Furthermore, both the synchronous and asynchronous concurrent composition of timed systems can be performed symbolically. The symbolic representations are given as formulae expressed...

  9. Pushing the asymptotics of the 6j-symbol further

    International Nuclear Information System (INIS)

    Dupuis, Maiete; Livine, Etera R.

    2009-01-01

    In the context of spin-foam models for quantum gravity, we investigate the asymptotical behavior of the (6j)-symbol at next-to-leading order. This gives the first quantum gravity correction to the (3d) Regge action. We compute it analytically and check our results against numerical calculations. The (6j)-symbol is the building block of the Ponzano-Regge amplitudes for 3d quantum gravity, and the present analysis is directly relevant to deriving the quantum corrections to gravitational correlations in the spin-foam formalism.

  10. Early understanding and production of graphic symbols.

    Science.gov (United States)

    Callaghan, T C

    1999-01-01

    Young children's ability to understand and produce graphic symbols within an environment of social communication was investigated in two experiments. Children aged 2, 3, and 4 years produced graphic symbols of simple objects on their own, used them in a social communicative game, and responded to experimenter's symbols. In Experiment 1 (N = 48), 2-year-olds did not effectively produce symbols or use the experimenter's symbols in the choice task, whereas 3- and 4-year-olds improved their drawings following the game and performed above chance with the experimenter's symbols. Ability to produce an effective graphic symbol was correlated with success on a task that measured understanding of the experimenter's symbols, supporting the claim that children's ability to produce a graphic symbol rests on the understanding of the symbolic function of pictures. In Experiment 2, 32 children aged 3 and 4 years improved their third set of drawings when they received feedback that their drawings were not effective communications. The results suggest that production and understanding of graphic symbols can be facilitated by the same social factors that improve verbal symbolic abilities, thereby raising the question of domain specificity in symbolic development.

  11. BASIN: Beowulf Analysis Symbolic INterface

    Science.gov (United States)

    Vesperini, Enrico; Goldberg, David M.; McMillan, Stephen L. W.; Dura, James; Jones, Douglas

    2013-08-01

    BASIN (Beowulf Analysis Symbolic INterface) is a flexible, integrated suite of tools for multiuser parallel data analysis and visualization that allows researchers to harness the power of Beowulf PC clusters and multi-processor machines without necessarily being experts in parallel programming. It also includes general tools for data distribution and parallel operations on distributed data for developing libraries for specific tasks.

  12. Symbolic power, robotting, and surveilling

    DEFF Research Database (Denmark)

    Skovsmose, Ole

    2012-01-01

    Symbolic power is discussed with reference to mathematics and formal languages. Two distinctions are crucial for establishing mechanical and formal perspectives: one between appearance and reality, and one between sense and reference. These distinctions include a nomination of what to consider pr...

  13. Symbolism and violence in art

    Directory of Open Access Journals (Sweden)

    Francisco Salmerón

    2013-09-01

    Full Text Available In this paper, we investigate the issues related to the symbolism and violence in psychoanalytic theories begining with Freudian and Kleinian hypothesis, and also explores how they relate to creative activity. The emphasis is on Kleinian hypothesis regarding aggression toward the mother’s body as engine for repair activity (art.

  14. Dream Symbol or Dream Process?

    Science.gov (United States)

    Himelstein, Philip

    1984-01-01

    Discusses the relationship of the symbolic content of dreams to the theory of the dream in psychoanalysis and Gestalt therapy. Points out that the utility of the dream depends upon the techniques of the therapist and not on the validity of the underlying theory of the dream. (LLL)

  15. Image segmentation for enhancing symbol recognition in prosthetic vision.

    Science.gov (United States)

    Horne, Lachlan; Barnes, Nick; McCarthy, Chris; He, Xuming

    2012-01-01

    Current and near-term implantable prosthetic vision systems offer the potential to restore some visual function, but suffer from poor resolution and dynamic range of induced phosphenes. This can make it difficult for users of prosthetic vision systems to identify symbolic information (such as signs) except in controlled conditions. Using image segmentation techniques from computer vision, we show it is possible to improve the clarity of such symbolic information for users of prosthetic vision implants in uncontrolled conditions. We use image segmentation to automatically divide a natural image into regions, and using a fixation point controlled by the user, select a region to phosphenize. This technique improves the apparent contrast and clarity of symbolic information over traditional phosphenization approaches.

  16. Symbol signing design for older drivers

    Science.gov (United States)

    1997-07-01

    This project evaluated the effectiveness of symbol traffic signs for young, middle-aged and elderly drivers. Daytime legibility distance and comprehension of 85 symbols in the Manual on Uniform Traffic Control Devices (MUTCD) were measured. Legibilit...

  17. Combining Symbolic Representations for Solving Timed Games

    Science.gov (United States)

    Ehlers, Rüdiger; Mattmüller, Robert; Peter, Hans-Jörg

    We present a general approach to combine symbolic state space representations for the discrete and continuous parts in the synthesis of winning strategies for timed reachability games. The combination is based on abstraction refinement where discrete symbolic techniques are used to produce a sequence of abstract timed game automata. After each refinement step, the resulting abstraction is used for computing an under- and an over-approximation of the timed winning states. The key idea is to identify large relevant and irrelevant parts of the precise weakest winning strategy already on coarse, and therefore simple, abstractions. If neither the existence nor nonexistence of a winning strategy can be established in the approximations, we use them to guide the refinement process. Based on a prototype that combines binary decision diagrams[7,9] and difference bound matrices[5], we experimentally evaluate the technique on standard benchmarks from timed controller synthesis. The results clearly demonstrate the potential of the new approach concerning running time and memory consumption compared to the classical on-the-fly algorithm implemented in Uppaal-Tiga [10,4].

  18. Symbol recognition with kernel density matching.

    Science.gov (United States)

    Zhang, Wan; Wenyin, Liu; Zhang, Kun

    2006-12-01

    We propose a novel approach to similarity assessment for graphic symbols. Symbols are represented as 2D kernel densities and their similarity is measured by the Kullback-Leibler divergence. Symbol orientation is found by gradient-based angle searching or independent component analysis. Experimental results show the outstanding performance of this approach in various situations.

  19. Electrical Words and Symbols: A Brief History

    Science.gov (United States)

    Auty, Geoff

    2012-01-01

    Finding an old notice on a canal towpath inspired a consultation with colleagues and search for evidence in an old book to help people look into how the words and symbols used in the teaching of electricity have evolved, including the apparent oddity of the symbol "I" for current. It is easy to explain that people use the symbol "Q" for what is…

  20. 7 CFR 29.3012 - Color symbols.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Color symbols. 29.3012 Section 29.3012 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... Color symbols. As applied to Burley, single color symbols are as follows: L—buff, F—tan, R—red, D—dark...

  1. 7 CFR 29.1066 - Symbol (S).

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Symbol (S). 29.1066 Section 29.1066 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... Type 92) § 29.1066 Symbol (S). As applied to Flue-cured tobacco the symbol (S) when used (a) as the...

  2. 7 CFR 29.3510 - Color symbols.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Color symbols. 29.3510 Section 29.3510 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... Type 95) § 29.3510 Color symbols. As applied to Dark Air-cured tobacco, color symbols are L—light brown...

  3. 7 CFR 29.2259 - Color symbols.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Color symbols. 29.2259 Section 29.2259 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... symbols. As applied to this type, color symbols are: L—light brown, F—medium brown, D—dark brown, M—mixed...

  4. 50 CFR 80.26 - Symbols.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 6 2010-10-01 2010-10-01 false Symbols. 80.26 Section 80.26 Wildlife and... RESTORATION AND DINGELL-JOHNSON SPORT FISH RESTORATION ACTS § 80.26 Symbols. We have prescribed distinctive symbols to identify projects funded by the Pittman-Robertson Wildlife Restoration Act and the Dingell...

  5. 7 CFR 29.1007 - Color symbols.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Color symbols. 29.1007 Section 29.1007 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... Type 92) § 29.1007 Color symbols. As applied to flue-cured tobacco, color symbols are L—lemon, F—orange...

  6. Sound-Symbolism Boosts Novel Word Learning

    Science.gov (United States)

    Lockwood, Gwilym; Dingemanse, Mark; Hagoort, Peter

    2016-01-01

    The existence of sound-symbolism (or a non-arbitrary link between form and meaning) is well-attested. However, sound-symbolism has mostly been investigated with nonwords in forced choice tasks, neither of which are representative of natural language. This study uses ideophones, which are naturally occurring sound-symbolic words that depict sensory…

  7. Strengthening National Identity through National Symbols and ...

    African Journals Online (AJOL)

    The objective is that the onus falls on national leaders to take ownership of the symbols so that these symbols can be internalised and a stronger national identity created. The use of national symbols must transcend issues of ethnicity, race and language. The method utilised assists in developing a conceptual approach to ...

  8. How Universal Are Universal Symbols? An Estimation of Cross-Cultural Adoption of Universal Healthcare Symbols.

    Science.gov (United States)

    Joy Lo, Chih-Wei; Yien, Huey-Wen; Chen, I-Ping

    2016-04-01

    To evaluate the effectiveness of universal health symbol usage and to analyze the factors influencing the adoption of those symbols in Taiwan. Universal symbols are an important innovative tool for health facility wayfinding systems. Hablamos Juntos, a universal healthcare symbol system developed in the United States, is a thoughtful, well-designed, and thoroughly tested symbol system that facilitates communication across languages and cultures. We designed a questionnaire to test how well the selected graphic symbols were understood by Taiwanese participants and determined factors related to successful symbol decoding, including participant-related factors, stimulation factors, and the interaction between stimulation and participants. Additionally, we further established a design principle for future development of localized healthcare symbols. (1) Eleven symbols were identified as highly comprehensible and effective symbols that can be directly adopted in Taiwanese healthcare settings. Sixteen symbols were deemed incomprehensible or confusing and thus had to be redesigned. Finally, 14 were identified as relatively incomprehensible and could thus be redesigned and then have their effectiveness evaluated again. (2) Three factors were found to influence the participants' differing levels of comprehension of the Hablamos Juntos symbols. In order to prevent the three aforementioned factors from causing difficulty in interpreting symbols, we suggest that the local symbol designers should (1) use more iconic images, (2) carefully evaluate the indexical and symbolic meaning of graphic symbols, and (3) collect the consensus of Taiwanese people with different educational backgrounds. © The Author(s) 2016.

  9. Reciprocity Laws for the Higher Tame Symbol and the Witt Symbol on an Algebraic Surface

    OpenAIRE

    Syder, Kirsty

    2013-01-01

    Parshin's higher Witt pairing on an arithmetic surface can be combined with the higher tame pairing to form a symbol taking values in the absolute abelian Galois group of the function field. We prove reciprocity laws for this symbol using techniques of Morrow for the Witt symbol and Romo for the higher tame symbol.

  10. Alternate symbol inversion for improved symbol synchronization in convolutionally coded systems

    Science.gov (United States)

    Simon, M. K.; Smith, J. G.

    1980-01-01

    Inverting alternate symbols of the encoder output of a convolutionally coded system provides sufficient density of symbol transitions to guarantee adequate symbol synchronizer performance, a guarantee otherwise lacking. Although alternate symbol inversion may increase or decrease the average transition density, depending on the data source model, it produces a maximum number of contiguous symbols without transition for a particular class of convolutional codes, independent of the data source model. Further, this maximum is sufficiently small to guarantee acceptable symbol synchronizer performance for typical applications. Subsequent inversion of alternate detected symbols permits proper decoding.

  11. Combining metric episodes with semantic event concepts within the Symbolic and Sub-Symbolic Robotics Intelligence Control System (SS-RICS)

    Science.gov (United States)

    Kelley, Troy D.; McGhee, S.

    2013-05-01

    This paper describes the ongoing development of a robotic control architecture that inspired by computational cognitive architectures from the discipline of cognitive psychology. The Symbolic and Sub-Symbolic Robotics Intelligence Control System (SS-RICS) combines symbolic and sub-symbolic representations of knowledge into a unified control architecture. The new architecture leverages previous work in cognitive architectures, specifically the development of the Adaptive Character of Thought-Rational (ACT-R) and Soar. This paper details current work on learning from episodes or events. The use of episodic memory as a learning mechanism has, until recently, been largely ignored by computational cognitive architectures. This paper details work on metric level episodic memory streams and methods for translating episodes into abstract schemas. The presentation will include research on learning through novelty and self generated feedback mechanisms for autonomous systems.

  12. Between Agency and Symbolic Violence

    DEFF Research Database (Denmark)

    Pedersen, Bodil Maria

    of this kind in public policies concerning gendered and gendering violence, it is necessary to develop critiques of aspects of symbolic violence (Beate Krais 1993), that have been conceptualised as ‘genderless gender’ by Suvi Ronkainen (2001). Thus statistic and other forms of research approaches wishing...... to influence policies on gendered violence must be concerned with, and develop research questions, methods and analytical strategies of connections between aspects of society/politics and gendered violence.......The Role of Symbolic Violence in Research and Policy: In Denmark it is a common assumption that gender equality, especially concerning sexual practices and other personal relations, has been fully accomplished. Consequently, public as well as professional discourses and practices concerning rape...

  13. Symbolic feature detection for image understanding

    Science.gov (United States)

    Aslan, Sinem; Akgül, Ceyhun Burak; Sankur, Bülent

    2014-03-01

    In this study we propose a model-driven codebook generation method used to assign probability scores to pixels in order to represent underlying local shapes they reside in. In the first version of the symbol library we limited ourselves to photometric and similarity transformations applied on eight prototypical shapes of flat plateau , ramp, valley, ridge, circular and elliptic respectively pit and hill and used randomized decision forest as the statistical classifier to compute shape class ambiguity of each pixel. We achieved90% accuracy in identification of known objects from alternate views, however, we could not outperform texture, global and local shape methods, but only color-based method in recognition of unknown objects. We present a progress plan to be accomplished as a future work to improve the proposed approach further.

  14. Bioeconomy, Moral Friction and Symbolic Law

    DEFF Research Database (Denmark)

    Hoeyer, Klaus

    2016-01-01

    several competing agendas are at play and to understand the effects, we therefore need to investigate empirically what emerges through this friction between competing governmental ambitions. My discussion is based on studies of tissue exchange in Europe and seeks to integrate theories of symbolic law...... ‘symbolic’, treaties aimed at protecting the body are symbols with great impact. Similarly, the material preparation of body parts as tradable grafts involves symbolic work and this symbolism is an essential part of making a ‘market’. I argue that instances of ‘symbolic law’ can reflect situations in which...

  15. VULTURES: EXEGESIS OF A SYMBOL

    Directory of Open Access Journals (Sweden)

    Maura Andreoni

    2016-12-01

    Full Text Available Depending on the different cultures and historical periods, vultures have been considered both impure or sacred. But, since they usually do not prey upon living animals, their symbolic dimension, associated to the idea of purification, is present in many myths, religions, burial praxis of ancient populations and remains in some religions today.In the ancient Mediterranean civilizations, they have been carved in some of the most ancient bas-reliefs of the history by stone age people; were sacred to Egyptians, who even took them as symbol of gods; in the classical times they were supposed to be all feminine and breed by parthenogenesis, and therefore appreciated by some early Christian authors, who came to comparing them even to the Virgin Mary; they have been studied and described by ancient scientists, naturalists, philosophers, playwrights; involved in many of the most enduring Greek and Roman myths and legends; many parts of their body were considered as a medicine or even a talisman for happiness; and they were so proverbial for Romans to become even one of the symbols of the founding of Rome itself.But they were also so fragile that perfumes, myrrh and pomegranates were supposed to be lethal for them ….

  16. Symbol Systems and Pictorial Representations

    Science.gov (United States)

    Diederich, Joachim; Wright, Susan

    All problem-solvers are subject to the same ultimate constraints -- limitations on space, time, and materials (Minsky, 1985). He introduces two principles: (1) Economics: Every intelligence must develop symbol-systems for representing objects, causes and goals, and (2) Sparseness: Every evolving intelligence will eventually encounter certain very special ideas -- e.g., about arithmetic, causal reasoning, and economics -- because these particular ideas are very much simpler than other ideas with similar uses. An extra-terrestrial intelligence (ETI) would have developed symbol systems to express these ideas and would have the capacity of multi-modal processing. Vakoch (1998) states that ...``ETI may rely significantly on other sensory modalities (than vision). Particularly useful representations would be ones that may be intelligible through more than one sensory modality. For instance, the information used to create a three-dimensional representation of an object might be intelligible to ETI heavily reliant on either visual or tactile sensory processes.'' The cross-modal representations Vakoch (1998) describes and the symbol systems Minsky (1985) proposes are called ``metaphors'' when combined. Metaphors allow for highly efficient communication. Metaphors are compact, condensed ways of expressing an idea: words, sounds, gestures or images are used in novel ways to refer to something they do not literally denote. Due to the importance of Minsky's ``economics'' principle, it is therefore possible that a message heavily relies on metaphors.

  17. Ionizing-radiation warning - Supplementary symbol

    International Nuclear Information System (INIS)

    2007-01-01

    This International Standard specifies the symbol to warn of the presence of a dangerous level of ionizing radiation from a high-level sealed radioactive source that can cause death or serious injury if handled carelessly. This symbol is not intended to replace the basic ionizing radiation symbol [ISO 361, ISO 7010:2003, Table 1 (Reference number W003)], but to supplement it by providing further information on the danger associated with the source and the necessity for untrained or uninformed members of the public to stay away from it. This symbol is recommended for use with International Atomic Energy Agency (IAEA) Category 1, 2, and 3 sealed radioactive sources. These sources are defined by the IAEA as having the ability to cause death or serious injuries. The paper informs about scope, shape, proportions and colour of the symbol, and application of the symbol. An annex provides the technical specifications of the symbol

  18. Employing fuzzy intervals and loop-based methodology for designing structural signature: an application to symbol recognition

    OpenAIRE

    Luqman, Muhammad Muzzamil; Delalandre, Mathieu; Brouard, Thierry; Ramel, Jean-Yves; Lladós, Josep

    2010-01-01

    Motivation of our work is to present a new methodology for symbol recognition. We support structural methods for representing visual associations in graphic documents. The proposed method employs a structural approach for symbol representation and a statistical classifier for recognition. We vectorize a graphic symbol, encode its topological and geometrical information by an ARG and compute a signature from this structural graph. To address the sensitivity of structural representations to def...

  19. Computing with concepts, computing with numbers: Llull, Leibniz, and Boole

    NARCIS (Netherlands)

    Uckelman, S.L.

    2010-01-01

    We consider two ways to understand "reasoning as computation", one which focuses on the computation of concept symbols and the other on the computation of number symbols. We illustrate these two ways with Llull’s Ars Combinatoria and Leibniz’s attempts to arithmetize language, respectively. We then

  20. Children's Non-symbolic, Symbolic Addition and Their Mapping Capacity at 4-7 Years Old.

    Science.gov (United States)

    Li, Yanjun; Zhang, Meng; Chen, Yinghe; Zhu, Xiaoshuang; Deng, Zhijun; Yan, Shijia

    2017-01-01

    The study aimed to examine the developmental trajectories of non-symbolic and symbolic addition capacities in children and the mapping ability between these two. We assessed 106 4- to 7-year-old children and found that 4-year-olds were able to do non-symbolic addition but not symbolic addition. Five-year-olds and older were able to do symbolic addition and their performance in symbolic addition exceeded non-symbolic addition in grade 1 (approximate age 7). These results suggested non-symbolic addition ability emerges earlier and is less affected by formal mathematical education than symbolic addition. Meanwhile, we tested children's bi-directional mapping ability using a novel task and found that children were able to map between symbolic and non-symbolic representations of number at age 5. Their ability in mapping non-symbolic to symbolic number became more proficient in grade 1 (approximate age 7). This suggests children at age 7 have developed a relatively mature symbolic representation system.

  1. Thesaurus-based disambiguation of gene symbols

    Directory of Open Access Journals (Sweden)

    Wain Hester M

    2005-06-01

    Full Text Available Abstract Background Massive text mining of the biological literature holds great promise of relating disparate information and discovering new knowledge. However, disambiguation of gene symbols is a major bottleneck. Results We developed a simple thesaurus-based disambiguation algorithm that can operate with very little training data. The thesaurus comprises the information from five human genetic databases and MeSH. The extent of the homonym problem for human gene symbols is shown to be substantial (33% of the genes in our combined thesaurus had one or more ambiguous symbols, not only because one symbol can refer to multiple genes, but also because a gene symbol can have many non-gene meanings. A test set of 52,529 Medline abstracts, containing 690 ambiguous human gene symbols taken from OMIM, was automatically generated. Overall accuracy of the disambiguation algorithm was up to 92.7% on the test set. Conclusion The ambiguity of human gene symbols is substantial, not only because one symbol may denote multiple genes but particularly because many symbols have other, non-gene meanings. The proposed disambiguation approach resolves most ambiguities in our test set with high accuracy, including the important gene/not a gene decisions. The algorithm is fast and scalable, enabling gene-symbol disambiguation in massive text mining applications.

  2. The Symbolic Independence From Power

    OpenAIRE

    Luisa Muraro

    2009-01-01

    Muraro’s article begins from the philosophical question of the ‘unthought’, and asks how our very image of thought is transformed when the thinking subject is a woman, and her thought is specifically linked to the experience of a body. On the basis of a feminist interrogation of sexual difference which reveals the forms of violence inherent in certain claims to universality, Muraro tries to develop a thinking of politics which would rest on its symbolic distance or independence from power. Th...

  3. BoR: Bag-of-Relations for Symbol Retrieval

    OpenAIRE

    K.C. , Santosh; Wendling , Laurent; Lamiroy , Bart

    2014-01-01

    International audience; In this paper, we address a new scheme for symbol retrieval based on bag-of-relations (BoRs) which are computed between extracted visual primitives (e.g. circle and corner). Our features consist of pairwise spatial relations from all possible combinations of individual visual primitives. The key characteristic of the overall process is to use topological relation information indexed in bags-of-relations and use this for recognition. As a consequence, directional relati...

  4. Clash of symbols a ride through the riches of glyphs

    CERN Document Server

    Webb, Stephen

    2018-01-01

    From the ampersat and amerpsand, via smileys and runes to the ubiquitous presence of mathematical and other symbols in sciences and technology: both old and modern documents abound with many familiar as well as lesser known characters, symbols and other glyphs. Yet, who would be readily able to answer any question like: ‘who chose π to represent the ratio of a circle’s diameter to its circumference?’ or ‘what’s the reasoning behind having a ⌘ key on my computer keyboard?’  This book is precisely for those who have always asked themselves this sort of questions. So, here are the stories behind one hundred glyphs, the book being evenly divided into five parts, with each featuring 20 symbols. Part 1, called Character sketches, looks at some of the glyphs we use in writing. Part 2, called Signs of the times, discusses some glyphs used in pol­itics, religion, and other areas of everyday life. Some of these symbols are common; others are used only rarely. Some are modern inventions; others, which...

  5. [Rod of Asclepius. Symbol of medicine].

    Science.gov (United States)

    Young, Pablo; Finn, Bárbara C; Bruetman, Julio E; Cesaro Gelos, Jorge; Trimarchi, Hernán

    2013-09-01

    Symbolism is one of the most archaic forms of human thoughts. Symbol derives from the Latin word symbolum, and the latter from the Greek symbolon or symballo, which means "I coincide, I make matches". The Medicine symbol represents a whole series of historical and ethical values. Asclepius Rod with one serpent entwined, has traditionally been the symbol of scientific medicine. In a misconception that has lasted 500 years, the Caduceus of Hermes, entwined by two serpents and with two wings, has been considered the symbol of Medicine. However, the Caduceus is the current symbol of Commerce. Asclepius Rod and the Caduceus of Hermes represent two professions, Medicine and Commerce that, in ethical practice, should not be mixed. Physicians should be aware of their real emblem, its historical origin and meaning.

  6. Symbolic Representation of Algorithmic Game Semantics

    OpenAIRE

    Dimovski, Aleksandar S.

    2012-01-01

    In this paper we revisit the regular-language representation of game semantics of second-order recursion free Idealized Algol with infinite data types. By using symbolic values instead of concrete ones we generalize the standard notion of regular-language and automata representations to that of corresponding symbolic representations. In this way terms with infinite data types, such as integers, can be expressed as finite symbolic-automata although the standard automata interpretation is infin...

  7. Symbols and Myths in European Integration

    DEFF Research Database (Denmark)

    Lynggaard, Kennet; Manners, Ian James; Søby, Christine

    2013-01-01

    The study of symbols and myths in European integration is crucial to our understanding of both how the European Union (EU) becomes constituted as a political reality and how the integration process itself occurs. By drawing on the study of symbols and myths from political science, humanities...... and cultural studies to the analysis of European integration, this paper will set out a project to provide a better understanding of how symbolic and substantial processes interact in European society....

  8. 7 CFR 29.2509 - Color symbols.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Color symbols. 29.2509 Section 29.2509 Agriculture...-Cured Tobacco (u.s. Types 22, 23, and Foreign Type 96) § 29.2509 Color symbols. As applied to these types, color symbols are L—light brown, F—medium brown, D—dark brown, M—mixed or variegated VF—greenish...

  9. Information decomposition method to analyze symbolical sequences

    International Nuclear Information System (INIS)

    Korotkov, E.V.; Korotkova, M.A.; Kudryashov, N.A.

    2003-01-01

    The information decomposition (ID) method to analyze symbolical sequences is presented. This method allows us to reveal a latent periodicity of any symbolical sequence. The ID method is shown to have advantages in comparison with application of the Fourier transformation, the wavelet transform and the dynamic programming method to look for latent periodicity. Examples of the latent periods for poetic texts, DNA sequences and amino acids are presented. Possible origin of a latent periodicity for different symbolical sequences is discussed

  10. Symbolic trephinations and population structure

    Directory of Open Access Journals (Sweden)

    László Szathmáry

    2006-12-01

    Full Text Available The sample examined consists of 19 skulls with symbolic trephinations and 86 skulls without trepanations dated from the X century. Skulls were all excavated in the Great Hungarian Plain in the Carpathian Basin, which was occupied by the Hungarian conquerors at the end of the IX century. The variations of 12 cranial dimensions of the trephined skulls were investigated and compared to the skulls without trepanations after performing a discriminant analysis. The classification results evince that the variability of non-trephined skulls shows a more homogeneous and a more characteristic picture of their own group than the trephined samples, which corresponds to the notion, formed by archaeological evidence and written historical sources, of a both ethnically and socially differing population of the Hungarian conquerors. According to historical research, a part of the population was of Finno-Ugric origin, while the military leading layer of society can be brought into connection with Turkic ethnic groups. All the same, individuals dug up with rich grave furniture and supposed to belong to this upper stratum of society are primarily characterized by the custom of symbolic trephination, and, as our results demonstrate, craniologically they seem to be more heterogeneous.

  11. Honorary authorship and symbolic violence.

    Science.gov (United States)

    Kovacs, Jozsef

    2017-03-01

    This paper invokes the conceptual framework of Bourdieu to analyse the mechanisms, which help to maintain inappropriate authorship practices and the functions these practices may serve. Bourdieu's social theory with its emphasis on mechanisms of domination can be applied to the academic field, too, where competition is omnipresent, control mechanisms of authorship are loose, and the result of performance assessment can be a matter of symbolic life and death for the researchers. This results in a problem of game-theoretic nature, where researchers' behaviour will be determined more by the logic of competition, than by individual character or motives. From this follows that changing this practice requires institutionalized mechanisms, and change cannot be expected from simply appealing to researchers' individual conscience. The article aims at showing that academic capital (administrative power, seniority) is translated into honorary authorship. With little control, undetected honorary authorship gives the appearance of possessing intellectual capital (scientific merit). In this way a dominant position is made to be seen as natural result of intellectual ability or scientific merit, which makes it more acceptable to those in dominated positions. The final conclusion of this paper is that undemocratic authorship decisions and authorship based performance assessment together are a form of symbolic violence.

  12. [Symbolism on "natural" in food].

    Science.gov (United States)

    da Veiga Soares Carvalho, Maria Claudia; Luz, Madel Therezinha

    2011-01-01

    The incorporated senses represent a set of possibilities for future life able to build individual and collective identities. This work deepens the habitus, in Bourdieu's terms, associated with "natural" and fast-food styles, making an interpretative analysis of symbolic exchanges of elements reproduced in feeding practices. We believe that this bricolage arrangement of elements enables bartering and hybridism, marked by a tension that reflects the insecurity of technological innovations. The "natural" style represents an ideal of self-sustainability, non-polluting production, which faces the sanitary and ecologic crisis of the planet, against the large-scale industrialization and fast urbanization, defined as depredation factors of basic living conditions. The exchanges happen in a symbolic game connected with the global economic game, in which social actors make bets, illusio, according to particular intentions in concrete action. There is a chance to reformulate the rules of the game in the "game", although with a precarious balance of forces, in which the weaker side loses, an agent may have the possibility of not reproducing the pressures of globalized feeding, which is far from what might seem supernatural.

  13. A New Adaptive Structural Signature for Symbol Recognition by Using a Galois Lattice as a Classifier.

    Science.gov (United States)

    Coustaty, M; Bertet, K; Visani, M; Ogier, J

    2011-08-01

    In this paper, we propose a new approach for symbol recognition using structural signatures and a Galois lattice as a classifier. The structural signatures are based on topological graphs computed from segments which are extracted from the symbol images by using an adapted Hough transform. These structural signatures-that can be seen as dynamic paths which carry high-level information-are robust toward various transformations. They are classified by using a Galois lattice as a classifier. The performance of the proposed approach is evaluated based on the GREC'03 symbol database, and the experimental results we obtain are encouraging.

  14. A catalog of graphic symbols used at maintenance control centers : toward a symbol standardization process.

    Science.gov (United States)

    2002-04-01

    This document catalogs the symbols presented with the various interfaces used by Federal Aviation Administration Airway Facilities specialists. It includes a high-level overview of each system and the symbols and coding conventions used. These data w...

  15. Data science and symbolic AI: Synergies, challenges and opportunities

    KAUST Repository

    Hoehndorf, Robert

    2017-06-02

    Symbolic approaches to artificial intelligence represent things within a domain of knowledge through physical symbols, combine symbols into symbol expressions, and manipulate symbols and symbol expressions through inference processes. While a large part of Data Science relies on statistics and applies statistical approaches to artificial intelligence, there is an increasing potential for successfully applying symbolic approaches as well. Symbolic representations and symbolic inference are close to human cognitive representations and therefore comprehensible and interpretable; they are widely used to represent data and metadata, and their specific semantic content must be taken into account for analysis of such information; and human communication largely relies on symbols, making symbolic representations a crucial part in the analysis of natural language. Here we discuss the role symbolic representations and inference can play in Data Science, highlight the research challenges from the perspective of the data scientist, and argue that symbolic methods should become a crucial component of the data scientists’ toolbox.

  16. Computational vision

    Science.gov (United States)

    Barrow, H. G.; Tenenbaum, J. M.

    1981-01-01

    The range of fundamental computational principles underlying human vision that equally apply to artificial and natural systems is surveyed. There emerges from research a view of the structuring of vision systems as a sequence of levels of representation, with the initial levels being primarily iconic (edges, regions, gradients) and the highest symbolic (surfaces, objects, scenes). Intermediate levels are constrained by information made available by preceding levels and information required by subsequent levels. In particular, it appears that physical and three-dimensional surface characteristics provide a critical transition from iconic to symbolic representations. A plausible vision system design incorporating these principles is outlined, and its key computational processes are elaborated.

  17. Logic-Symbolic and Alphabetization

    Directory of Open Access Journals (Sweden)

    Dair Aily Franco de Camargo

    2007-10-01

    Full Text Available The present article tries to recoup the ideas and the proposal of H. Furth (1973, pointing it as another option to try to work with the children’s difficulties in the alphabetization process. The author considers the substitution of “schools of the language” for “schools of the thought”, that is, to substitute the option of the teacher in the reading-writing education, in its traditional form, of how to transform graphical signals into sonorous and vice-versa, for that one of the thought consolidation, feeding the intellect in development of the child by exercises of “symbolic logic”. For theoretical basing, we still present some aspects of the psychogenetic theory, as well as other works carried through more recently on the subject, that even so “transvestite” (disguised with new clothing, still find their beddings in the J. Piaget’s basis.

  18. Symbolic walk in regular networks

    International Nuclear Information System (INIS)

    Ermann, Leonardo; Carlo, Gabriel G

    2015-01-01

    We find that a symbolic walk (SW)—performed by a walker with memory given by a Bernoulli shift—is able to distinguish between the random or chaotic topology of a given network. We show this result by means of studying the undirected baker network, which is defined by following the Ulam approach for the baker transformation in order to introduce the effect of deterministic chaos into its structure. The chaotic topology is revealed through the central role played by the nodes associated with the positions corresponding to the shortest periodic orbits of the generating map. They are the overwhelmingly most visited nodes in the limit cycles at which the SW asymptotically arrives. Our findings contribute to linking deterministic chaotic dynamics with the properties of networks constructed using the Ulam approach. (paper)

  19. The Symbolic Independence From Power

    Directory of Open Access Journals (Sweden)

    Luisa Muraro

    2009-05-01

    Full Text Available Muraro’s article begins from the philosophical question of the ‘unthought’, and asks how our very image of thought is transformed when the thinking subject is a woman, and her thought is specifically linked to the experience of a body. On the basis of a feminist interrogation of sexual difference which reveals the forms of violence inherent in certain claims to universality, Muraro tries to develop a thinking of politics which would rest on its symbolic distance or independence from power. Through readings of Freud, Macbeth, Saint Paul and women’s narratives, Muraro investigates the dangers borne by the fusion of power and politics and explores the ways in which they could be disjoined.

  20. Television Commercials: Symbols, Myths and Metaphors.

    Science.gov (United States)

    Feasley, Florence G.

    Television commercials convey to the audience through symbols, metaphors, and myths the feelings and emotions deeply rooted in our culture. While commercials on one level are concerned with a representation of the product or service, they are on another level a symbol of a larger meaning: love, family, romance, motherhood, or hero worship. A can…

  1. History of international symbol for ionizing radiation

    International Nuclear Information System (INIS)

    Franic, Z.

    1996-01-01

    The year 1996 marks the 50th anniversary of the radiation warning symbol as we currently know it. It was (except the colours used) doodled out at the University of California, Berkeley, sometime in 1946 by a small group of people. The key guy responsible was Nelson Garden, then the head of the Health Chemistry Group, at the Radiation Laboratory. The radiation warning symbol should not be confused with the civil defence symbol (circle divided into six equal sections, three of these being black and three yellow), designed to identify fallout shelters. The basic radiation symbol was eventually internationally standardized by ISO code: 361-1975 (E). Variations of this symbol are frequently used in logotypes radiation protection organizations or associations. Particularly nice are those of International Radiation Protection Association (IRPA) and Croatian Radiation Protection Association (CRPA) that combines traditional Croatian motives with high technology. However, apart from speculations, there is no definite answer why did the Berkeley people chose this particular symbol. Whatever the reason was, it was very good choice because the ionizing radiation symbol is simple, readily identifiable, i.e., not similar to other warning symbols, and discernible at a large distance. (author)

  2. The Rhetoric of Disenchantment through Symbolism

    Science.gov (United States)

    Munyangeyo, Théophile

    2012-01-01

    The symbolism of "flowers" has always been a significant part of cultures around the world due to their functional meaning in daily life. From their decorative to their aromatic role, flowers and their symbolic meaning trigger emotions, convey wishes and represent thoughts that can not be explicitly expressed. In this regard, an…

  3. Efficient Bit-to-Symbol Likelihood Mappings

    Science.gov (United States)

    Moision, Bruce E.; Nakashima, Michael A.

    2010-01-01

    This innovation is an efficient algorithm designed to perform bit-to-symbol and symbol-to-bit likelihood mappings that represent a significant portion of the complexity of an error-correction code decoder for high-order constellations. Recent implementation of the algorithm in hardware has yielded an 8- percent reduction in overall area relative to the prior design.

  4. 14 CFR 95.3 - Symbols.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Symbols. 95.3 Section 95.3 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES IFR ALTITUDES General § 95.3 Symbols. For the purposes of this part— (a) COP means...

  5. An FMRI-compatible Symbol Search task.

    Science.gov (United States)

    Liebel, Spencer W; Clark, Uraina S; Xu, Xiaomeng; Riskin-Jones, Hannah H; Hawkshead, Brittany E; Schwarz, Nicolette F; Labbe, Donald; Jerskey, Beth A; Sweet, Lawrence H

    2015-03-01

    Our objective was to determine whether a Symbol Search paradigm developed for functional magnetic resonance imaging (FMRI) is a reliable and valid measure of cognitive processing speed (CPS) in healthy older adults. As all older adults are expected to experience cognitive declines due to aging, and CPS is one of the domains most affected by age, establishing a reliable and valid measure of CPS that can be administered inside an MR scanner may prove invaluable in future clinical and research settings. We evaluated the reliability and construct validity of a newly developed FMRI Symbol Search task by comparing participants' performance in and outside of the scanner and to the widely used and standardized Symbol Search subtest of the Wechsler Adult Intelligence Scale (WAIS). A brief battery of neuropsychological measures was also administered to assess the convergent and discriminant validity of the FMRI Symbol Search task. The FMRI Symbol Search task demonstrated high test-retest reliability when compared to performance on the same task administered out of the scanner (r=.791; pSymbol Search (r=.717; pSymbol Search task were also observed. The FMRI Symbol Search task is a reliable and valid measure of CPS in healthy older adults and exhibits expected sensitivity to the effects of age on CPS performance.

  6. Deficient symbol processing in Alzheimer disease.

    Science.gov (United States)

    Toepper, Max; Steuwe, Carolin; Beblo, Thomas; Bauer, Eva; Boedeker, Sebastian; Thomas, Christine; Markowitsch, Hans J; Driessen, Martin; Sammer, Gebhard

    2014-01-01

    Symbols and signs have been suggested to improve the orientation of patients suffering from Alzheimer disease (AD). However, there are hardly any studies that confirm whether AD patients benefit from signs or symbols and which symbol characteristics might improve or impede their symbol comprehension. To address these issues, 30 AD patients and 30 matched healthy controls performed a symbol processing task (SPT) with 4 different item categories. A repeated-measures analysis of variance was run to identify impact of different item categories on performance accuracy in both the experimental groups. Moreover, SPT scores were correlated with neuropsychological test scores in a broad range of other cognitive domains. Finally, diagnostic accuracy of the SPT was calculated by a receiver-operating characteristic curve analysis. Results revealed a global symbol processing dysfunction in AD that was associated with semantic memory and executive deficits. Moreover, AD patients showed a disproportional performance decline at SPT items with visual distraction. Finally, the SPT total score showed high sensitivity and specificity in differentiating between AD patients and healthy controls. The present findings suggest that specific symbol features impede symbol processing in AD and argue for a diagnostic benefit of the SPT in neuropsychological assessment.

  7. A Symbolic Logic for Representing Linear Models.

    Science.gov (United States)

    Hall, Charles E.

    A set of symbols is presented along with logical operators which represent the possible manipulations of the linear model. The use of these symbols and operators is to simplify the representation of analysis of variance models, correlation models and factor analysis models. (Author)

  8. Sound-symbolism boosts novel word learning

    NARCIS (Netherlands)

    Lockwood, G.F.; Dingemanse, M.; Hagoort, P.

    2016-01-01

    The existence of sound-symbolism (or a non-arbitrary link between form and meaning) is well-attested. However, sound-symbolism has mostly been investigated with nonwords in forced choice tasks, neither of which are representative of natural language. This study uses ideophones, which are naturally

  9. Self-symbols as implicit motivators

    NARCIS (Netherlands)

    Holland, R.W.; Wennekers, A.M.; Bijlstra, G.; Jongenelen, M.M.; van Knippenberg, A.

    2009-01-01

    The present research explored the nonconscious motivational influence of self-symbols. In line with recent findings on the motivational influence of positive affect, we hypothesized that positive affect associated with self-symbols may boost motivation. In Study 1 people drank more of a beverage

  10. Self-symbols as implicit motivators

    NARCIS (Netherlands)

    Holland, R.W.; Wennekers, A.M.; Bijlstra, G.; Jongenelen, M.M.; Knippenberg, A.F.M. van

    2009-01-01

    The present research explored the nonconscious motivational influence of self-symbols. In line with recent findings on the motivational influence of positive affect, we hypothesized that positive affect associated with self-symbols may boost motivation. In Study I people drank more of a beverage

  11. The Symbolic Meaning of Legal Subjectivity

    NARCIS (Netherlands)

    Pessers, D.; van Klink, B.; van Beers, B.; Poort, L.

    2016-01-01

    The legitimacy of the law is not to be found, as is often claimed, in procedural justice, but in the core function of the law: the symbolic insertion of every new generation into the community of legal subjects. This symbolic function is most ambitiously expressed in the Universal Declaration of

  12. Symbolic-Numeric Integration of the Dynamical Cosserat Equations

    KAUST Repository

    Lyakhov, Dmitry A.

    2017-08-29

    We devise a symbolic-numeric approach to the integration of the dynamical part of the Cosserat equations, a system of nonlinear partial differential equations describing the mechanical behavior of slender structures, like fibers and rods. This is based on our previous results on the construction of a closed form general solution to the kinematic part of the Cosserat system. Our approach combines methods of numerical exponential integration and symbolic integration of the intermediate system of nonlinear ordinary differential equations describing the dynamics of one of the arbitrary vector-functions in the general solution of the kinematic part in terms of the module of the twist vector-function. We present an experimental comparison with the well-established generalized \\\\alpha -method illustrating the computational efficiency of our approach for problems in structural mechanics.

  13. Symbol synchronization for the TDRSS decoder

    Science.gov (United States)

    Costello, D. J., Jr.

    1983-01-01

    Each 8 bits out of the Viterbi decoder correspond to one symbol of the R/S code. Synchronization must be maintained here so that each 8-bit symbol delivered to the R/S decoder corresponds to an 8-bit symbol from the R/S encoder. Lack of synchronization, would cause an error in almost every R/S symbol since even a - 1-bit sync slip shifts every bit in each 8-bit symbol by one position, therby confusing the mapping betweeen 8-bit sequences and symbols. The error correcting capability of the R/S code would be exceeded. Possible ways to correcting this condition include: (1) designing the R/S decoder to recognize the overload and shifting the output sequence of the inner decoder to establish a different sync state; (2) using the characteristics of the inner decoder to establish symbol synchronization for the outer code, with or without a deinterleaver and an interleaver; and (3) modifying the encoder to alternate periodically between two sets of generators.

  14. The rhetoric of disenchantment through symbolism

    Directory of Open Access Journals (Sweden)

    Théophile Munyangeyo

    2012-10-01

    Full Text Available The symbolism of flowers has always been a significant part of cultures around the world due to their functional meaning in daily life. From their decorative to their aromatic role, flowers and their symbolic meaning trigger emotions, convey wishes and represent thoughts that can not be explicitly expressed. In this regard, an elaborate language based on flower symbolism was developed in many societies, to convey clear messages to the recipient. However, in some cultural contexts, although the flower symbolism has social connotations, it is mainly associated with economic references. As flowers are an essential precursor to fruits, they are inevitably a source of expectations and hence foster a set of hopes and dreams, which can ultimately lead to excitement or disappointment.Through a discourse analysis based on factional narratives, this article explores the parameters through which the symbolism of bifaceted meaning of flowers fictionalises a space that refers to the social reality. This association between the fictional world and social reference has highlighted that writing can profoundly be a means of representing social events through the rhetoric of symbolism. Through a sociological reading approach, this paper aims to analyse how the symbolism of flowers informs the rhetoric of disenchantment that can foster a content-based pedagogy in language learning where silencing practices engender imagery to exercise the freedom of expression.

  15. European Languages: Instruments and Symbols

    Directory of Open Access Journals (Sweden)

    Martina Ožbot

    2008-07-01

    Further, the role of Latin as the single most important European language over the centuries and as a unifying feature of European culture is discussed. Parallels are drawn between Latin as the historical European lingua franca on the one hand and English as the modern language of international communication on the other: the importance of both languages started growing after substantial territorial expansion of their speakers and it was especially the political and economic power associated to these languages that played a significant role in their diffusion and long-term influence. Taking into consideration the instrumental as well as the symbolic function of languages, the question about the relationship between English and other European languages in today’s Europe is dealt with; it is suggested that the European languages are in principle not endangered as a result of the spread of English, with the exception of those instances in which English has been taking over the functions they have traditionally performed as national or community languages. It is emphasized that the future of Europe lies in the promotion of biand multilingualism, which have, in actual fact, been present on this continent throughout its history, and which in the cases of some European languages (e.g. Catalan, Basque, Irish, etc. have been successfully enhanced over the past decades.

  16. Designing and evaluating symbols for electronic displays of navigation information : symbol stereotypes and symbol-feature rules

    Science.gov (United States)

    2005-09-30

    There is currently no common symbology standard for the electronic display of navigation information. The wide range of display technology and the different functions these displays support makes it difficult to design symbols that are easily recogni...

  17. Symbolic Capital, Consumption, and Health Inequality

    Science.gov (United States)

    2011-01-01

    Research on economic inequalities in health has been largely polarized between psychosocial and neomaterial approaches. Examination of symbolic capital—the material display of social status and how it is structurally constrained—is an underutilized way of exploring economic disparities in health and may help to resolve the existing theoretical polarization. In contemporary society, what people do with money and how they consume and display symbols of wealth may be as important as income itself. After tracing the historical rise of consumption in capitalist society and its interrelationship with economic inequality, I discuss evidence for the role of symbolic capital in health inequalities and suggest directions for future research. PMID:21164087

  18. Symbolic Representation of Algorithmic Game Semantics

    Directory of Open Access Journals (Sweden)

    Aleksandar S. Dimovski

    2012-10-01

    Full Text Available In this paper we revisit the regular-language representation of game semantics of second-order recursion free Idealized Algol with infinite data types. By using symbolic values instead of concrete ones we generalize the standard notion of regular-language and automata representations to that of corresponding symbolic representations. In this way terms with infinite data types, such as integers, can be expressed as finite symbolic-automata although the standard automata interpretation is infinite. Moreover, significant reductions of the state space of game semantics models are obtained. This enables efficient verification of terms, which is illustrated with several examples.

  19. Social and Symbolic Capital in Firm Clusters

    DEFF Research Database (Denmark)

    Gretzinger, Susanne; Royer, Susanne

    Based on a relational perspective this paper analyses the case of the “Mechatronics Cluster” in Southern Jutland, Denmark. We found that cluster managers are not aware of the importance of social and symbolic capital. Cluster managers could have access to both but they are not aware...... of this resource and they don´t have any knowledge how to manage social and symbolic capital. Just to integrate social-capital-supporting initiatives in the day to day business would help to develop and to foster social and symbolic capital on a low cost level. And in our example just to integrate successful sub...

  20. Symbols and Emblemata. Peter the First

    Directory of Open Access Journals (Sweden)

    Aleksandrova A. D.

    2018-01-01

    Full Text Available the article is devoted to the study of the emergence of the concept of «symbol» in Russian culture of the XVIII century. The idea of introducing symbols into the culture, allowed not only the extollment of the secular over the religious, but also the strengthening of the right to power. Appealing to the book «Symbols and Emblemata» allows us to consider the ideas of Peter the First in the framework of cultural discourse.

  1. Communications in American Politics: Symbols without Substance.

    Science.gov (United States)

    Cragan, John F.; Shields, Donald C.

    1980-01-01

    Political campaigns have been more concerned with public relations than with public policy as a result of television domination. Illustrates how political speeches are dominated by symbols without substance. (CK)

  2. Matter and symbols of the artificial

    Energy Technology Data Exchange (ETDEWEB)

    Rocha, L.M.

    1998-08-01

    The study of complex systems should be based on a systems-theoretic framework which requires both self-organizing and symbolic dimensions. An inclusive framework based on the notion of semiotics is advanced to build models capable of representing, as well as evolving in their environments, with implications for Artificial Life. Such undertaking is pursued by discussing the ways in which symbol and matter are irreducibly intertwined in evolutionary systems. The problem is thus phrased in terms of the semiotic categories of syntax, semantics, and pragmatics. With this semiotic view of matter and symbols the requirements of semiotic closure are expressed in models with both self-organizing and symbolic characteristics. Situated action and recent developments in the evolution of cellular automata rules to solve non-trivial tasks are discussed in this context. Finally, indirect encoding schemes for genetic algorithms are developed which follow the semiotic framework here proposed.

  3. Symbolic Processes in Young Autistic Children.

    Science.gov (United States)

    Sigman, Marian; Mundy, Peter

    1987-01-01

    Demonstrates that young autistic children suffer from deficits in social understanding and symbolic representations of other individuals. Data suggest that the core deficit appears to lie at the intersection of representational abilities and social experiences. (RWB)

  4. Program verification using symbolic game semantics

    DEFF Research Database (Denmark)

    Dimovski, Aleksandar

    2014-01-01

    We introduce a new symbolic representation of algorithmic game semantics, and show how it can be applied for efficient verification of open (incomplete) programs. The focus is on an Algol-like programming language which contains the core ingredients of imperative and functional languages...... of game semantics to that of corresponding symbolic representations. In this way programs with infinite data types, such as integers, can be expressed as finite-state symbolic-automata although the standard automata representation is infinite-state, i.e. the standard regular-language representation has...... infinite summations. Moreover, in this way significant reductions of the state space of game semantics models are obtained. This enables efficient verification of programs by our prototype tool based on symbolic game models, which is illustrated with several examples....

  5. Specification for symbol for ionizing radiation

    International Nuclear Information System (INIS)

    1974-01-01

    This Malaysia Standard specification specifies a symbol recommended for use only to signify the actual or potential presence of ionizing radiation (#betta#, α, #betta# only) and to identify objects, devices, materials or combinations of materials which emit such radiation. (author)

  6. [Symbol: see text]2 Optimized predictive image coding with [Symbol: see text]∞ bound.

    Science.gov (United States)

    Chuah, Sceuchin; Dumitrescu, Sorina; Wu, Xiaolin

    2013-12-01

    In many scientific, medical, and defense applications of image/video compression, an [Symbol: see text]∞ error bound is required. However, pure[Symbol: see text]∞-optimized image coding, colloquially known as near-lossless image coding, is prone to structured errors such as contours and speckles if the bit rate is not sufficiently high; moreover, most of the previous [Symbol: see text]∞-based image coding methods suffer from poor rate control. In contrast, the [Symbol: see text]2 error metric aims for average fidelity and hence preserves the subtlety of smooth waveforms better than the ∞ error metric and it offers fine granularity in rate control, but pure [Symbol: see text]2-based image coding methods (e.g., JPEG 2000) cannot bound individual errors as the [Symbol: see text]∞-based methods can. This paper presents a new compression approach to retain the benefits and circumvent the pitfalls of the two error metrics. A common approach of near-lossless image coding is to embed into a DPCM prediction loop a uniform scalar quantizer of residual errors. The said uniform scalar quantizer is replaced, in the proposed new approach, by a set of context-based [Symbol: see text]2-optimized quantizers. The optimization criterion is to minimize a weighted sum of the [Symbol: see text]2 distortion and the entropy while maintaining a strict [Symbol: see text]∞ error bound. The resulting method obtains good rate-distortion performance in both [Symbol: see text]2 and [Symbol: see text]∞ metrics and also increases the rate granularity. Compared with JPEG 2000, the new method not only guarantees lower [Symbol: see text]∞ error for all bit rates, but also it achieves higher PSNR for relatively high bit rates.

  7. Symbolic and non symbolic numerical representation in adults with and without developmental dyscalculia

    Directory of Open Access Journals (Sweden)

    Furman Tamar

    2012-11-01

    Full Text Available Abstract Background The question whether Developmental Dyscalculia (DD; a deficit in the ability to process numerical information is the result of deficiencies in the non symbolic numerical representation system (e.g., a group of dots or in the symbolic numerical representation system (e.g., Arabic numerals has been debated in scientific literature. It is accepted that the non symbolic system is divided into two different ranges, the subitizing range (i.e., quantities from 1-4 which is processed automatically and quickly, and the counting range (i.e., quantities larger than 4 which is an attention demanding procedure and is therefore processed serially and slowly. However, so far no study has tested the automaticity of symbolic and non symbolic representation in DD participants separately for the subitizing and the counting ranges. Methods DD and control participants undergo a novel version of the Stroop task, i.e., the Enumeration Stroop. They were presented with a random series of between one and nine written digits, and were asked to name either the relevant written digit (in the symbolic task or the relevant quantity of digits (in the non symbolic task while ignoring the irrelevant aspect. Result DD participants, unlike the control group, didn't show any congruency effect in the subitizing range of the non symbolic task. Conclusion These findings suggest that DD may be impaired in the ability to process symbolic numerical information or in the ability to automatically associate the two systems (i.e., the symbolic vs. the non symbolic. Additionally DD have deficiencies in the non symbolic counting range.

  8. Symbolic logic and mechanical theorem proving

    CERN Document Server

    Chang, Chin-Liang

    1969-01-01

    This book contains an introduction to symbolic logic and a thorough discussion of mechanical theorem proving and its applications. The book consists of three major parts. Chapters 2 and 3 constitute an introduction to symbolic logic. Chapters 4-9 introduce several techniques in mechanical theorem proving, and Chapters 10 an 11 show how theorem proving can be applied to various areas such as question answering, problem solving, program analysis, and program synthesis.

  9. Program verification using symbolic game semantics

    OpenAIRE

    Dimovski, Aleksandar

    2014-01-01

    We introduce a new symbolic representation of algorithmic game semantics, and show how it can be applied for efficient verification of open (incomplete) programs. The focus is on an Algol-like programming language which contains the core ingredients of imperative and functional languages, especially on its second-order recursion-free fragment with infinite data types. We revisit the regular-language representation of game semantics of this language fragment.By using symbolic values instead of...

  10. Active Exploration for Learning Symbolic Representations

    OpenAIRE

    Andersen, Garrett; Konidaris, George

    2017-01-01

    We introduce an online active exploration algorithm for data-efficiently learning an abstract symbolic model of an environment. Our algorithm is divided into two parts: the first part quickly generates an intermediate Bayesian symbolic model from the data that the agent has collected so far, which the agent can then use along with the second part to guide its future exploration towards regions of the state space that the model is uncertain about. We show that our algorithm outperforms random ...

  11. Symbol Spotting using Full Visibility Graph Representation

    OpenAIRE

    Locteau , Hervé; Adam , Sébastien; Trupin , Eric; Labiche , Jacques; Héroux , Pierre

    2007-01-01

    International audience; In this paper, a method for matching symbols in line-drawings is presented. Facing both segmentation and recognition of symbols is a difficult challenge. Starting from the results of a vectorization proce- dure, a visibility graph is built to enhance the main geometric constraints which were specified during the construction of the initial document. The cliques detection, which correspond to a perceptual grouping of primi- tives, is used in the system to detect regions...

  12. Symbolic dynamics and description of complexity

    International Nuclear Information System (INIS)

    Hao Bailin.

    1992-10-01

    Symbolic dynamics provides a general framework to describe complexity of dynamical behaviour. After a discussion of the state of the filed special emphasis will be made on the role of transfer matrix (the Stefan matrix) both in deriving the grammar from known symbolic dynamics and in extracting the rules from experimental data. The block structure of the Stefan matrix may serve as another indicator of complexity of the associated dynamics. (author). 33 refs, 6 figs

  13. Symbolic Number Comparison Is Not Processed by the Analog Number System: Different Symbolic and Non-symbolic Numerical Distance and Size Effects.

    Science.gov (United States)

    Krajcsi, Attila; Lengyel, Gábor; Kojouharova, Petia

    2018-01-01

    HIGHLIGHTS We test whether symbolic number comparison is handled by an analog noisy system.Analog system model has systematic biases in describing symbolic number comparison.This suggests that symbolic and non-symbolic numbers are processed by different systems. Dominant numerical cognition models suppose that both symbolic and non-symbolic numbers are processed by the Analog Number System (ANS) working according to Weber's law. It was proposed that in a number comparison task the numerical distance and size effects reflect a ratio-based performance which is the sign of the ANS activation. However, increasing number of findings and alternative models propose that symbolic and non-symbolic numbers might be processed by different representations. Importantly, alternative explanations may offer similar predictions to the ANS prediction, therefore, former evidence usually utilizing only the goodness of fit of the ANS prediction is not sufficient to support the ANS account. To test the ANS model more rigorously, a more extensive test is offered here. Several properties of the ANS predictions for the error rates, reaction times, and diffusion model drift rates were systematically analyzed in both non-symbolic dot comparison and symbolic Indo-Arabic comparison tasks. It was consistently found that while the ANS model's prediction is relatively good for the non-symbolic dot comparison, its prediction is poorer and systematically biased for the symbolic Indo-Arabic comparison. We conclude that only non-symbolic comparison is supported by the ANS, and symbolic number comparisons are processed by other representation.

  14. What’s the problem with symbolic religious establishment? The alienation and symbolic equality accounts

    DEFF Research Database (Denmark)

    Lægaard, Sune

    2017-01-01

    In this chapter I examine two possible reasons, which are prominent but often not systematically discussed in the literature, for thinking even purely symbolic establishment problematic. These are considerations of alienation and symbolic equality. I am only concerned with ways in which establish......In this chapter I examine two possible reasons, which are prominent but often not systematically discussed in the literature, for thinking even purely symbolic establishment problematic. These are considerations of alienation and symbolic equality. I am only concerned with ways in which...

  15. The symbolic power of corporate culture organizations

    Directory of Open Access Journals (Sweden)

    V. P. Kubko

    2014-01-01

    Full Text Available The purpose of the study is to outline the nature of the symbolic block of the corporate culture and its role in the formation and development of the modern organization. In this paper the symbolic part of the corporate culture of the modern organizations has been analyzed. The role of symbols in the development and formation of corporate culture organizations and their values is determined. Corporate culture is characterized as a set of behavioral norms, artifacts, values, ideas and concepts, which are created by the organization. The corporate culture has to help us overcome obstacles, internal and external, on the way to success and prosperity. Corporate culture is a socially created reality which helps us to solve certain problems. The corporate culture serves as the level of formation of knowledge, skills, technology activities to achieve the objectives of a certain organization. The space of corporate culture, in turn, consists of meanings, symbols, myths, ideological directives, behavioral practices, communication links and a set of material objects. Thus, the characters are a common feature of the concept of corporate culture and thanks to them the values of the orientation «are being transmitted» to all members of the organization. The symbolic block of the culture has rituals, symbols, myths, legends, heroic peculiarities of organizations that reflect the most concise strong forms of the company culture, its major landmarks in the laconic and figurative shape.

  16. Computer programming and computer systems

    CERN Document Server

    Hassitt, Anthony

    1966-01-01

    Computer Programming and Computer Systems imparts a "reading knowledge? of computer systems.This book describes the aspects of machine-language programming, monitor systems, computer hardware, and advanced programming that every thorough programmer should be acquainted with. This text discusses the automatic electronic digital computers, symbolic language, Reverse Polish Notation, and Fortran into assembly language. The routine for reading blocked tapes, dimension statements in subroutines, general-purpose input routine, and efficient use of memory are also elaborated.This publication is inten

  17. The Scientific Import of Symbols in Human Knowledge | Agbanusi ...

    African Journals Online (AJOL)

    Symbolism, being the use of symbols to represent ideas, it is generally believed that symbolism is restricted to the Arts, especially logic and literature. However, recent developments have shown that symbolism can be an interesting companion and, in fact, a necessary complement, of science. This work X-Rays the ...

  18. 36 CFR 264.11 - Use of symbol.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Use of symbol. 264.11 Section... MANAGEMENT Mount St. Helens National Volcanic Monument Symbol § 264.11 Use of symbol. Except as provided in § 264.12, use of the Mount St. Helens National Volcanic Monument official symbol, including a facsimile...

  19. 7 CFR 97.900 - Form of official identification symbol.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Form of official identification symbol. 97.900 Section... symbol. The symbol set forth in Figure 1, containing the words “Plant Variety Protection Office” and “U.S. Department of Agriculture,” shall be the official identification symbol of the Plant Variety Protection...

  20. 47 CFR 87.171 - Class of station symbols.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Class of station symbols. 87.171 Section 87.171... Frequencies § 87.171 Class of station symbols. The two or three letter symbols for the classes of station in the aviation services are: Symbol and class of station AX—Aeronautical fixed AXO—Aeronautical...

  1. The Scientific Import of Symbols in Human Knowledge

    African Journals Online (AJOL)

    Nneka Umera-Okeke

    Abstract. Symbolism, being the use of symbols to represent ideas, it is generally believed that symbolism is restricted to the Arts, especially logic and literature. However, recent developments have shown that symbolism can be an interesting companion and, in fact, a necessary complement, of science. This work X-Rays the ...

  2. Planning chemical syntheses with deep neural networks and symbolic AI

    Science.gov (United States)

    Segler, Marwin H. S.; Preuss, Mike; Waller, Mark P.

    2018-03-01

    To plan the syntheses of small organic molecules, chemists use retrosynthesis, a problem-solving technique in which target molecules are recursively transformed into increasingly simpler precursors. Computer-aided retrosynthesis would be a valuable tool but at present it is slow and provides results of unsatisfactory quality. Here we use Monte Carlo tree search and symbolic artificial intelligence (AI) to discover retrosynthetic routes. We combined Monte Carlo tree search with an expansion policy network that guides the search, and a filter network to pre-select the most promising retrosynthetic steps. These deep neural networks were trained on essentially all reactions ever published in organic chemistry. Our system solves for almost twice as many molecules, thirty times faster than the traditional computer-aided search method, which is based on extracted rules and hand-designed heuristics. In a double-blind AB test, chemists on average considered our computer-generated routes to be equivalent to reported literature routes.

  3. Planning chemical syntheses with deep neural networks and symbolic AI.

    Science.gov (United States)

    Segler, Marwin H S; Preuss, Mike; Waller, Mark P

    2018-03-28

    To plan the syntheses of small organic molecules, chemists use retrosynthesis, a problem-solving technique in which target molecules are recursively transformed into increasingly simpler precursors. Computer-aided retrosynthesis would be a valuable tool but at present it is slow and provides results of unsatisfactory quality. Here we use Monte Carlo tree search and symbolic artificial intelligence (AI) to discover retrosynthetic routes. We combined Monte Carlo tree search with an expansion policy network that guides the search, and a filter network to pre-select the most promising retrosynthetic steps. These deep neural networks were trained on essentially all reactions ever published in organic chemistry. Our system solves for almost twice as many molecules, thirty times faster than the traditional computer-aided search method, which is based on extracted rules and hand-designed heuristics. In a double-blind AB test, chemists on average considered our computer-generated routes to be equivalent to reported literature routes.

  4. The symbol grounding problem revisited: a thorough evaluation of the ANS mapping account and the proposal of an alternative account based on symbol-symbol associations.

    Directory of Open Access Journals (Sweden)

    Bert Reynvoet

    2016-10-01

    Full Text Available Recently, a lot of studies in the domain of numerical cognition have been published demonstrating a robust association between numerical symbol processing and individual differences in mathematics achievement. Because numerical symbols are so important for mathematics achievement, many researchers want to provide an answer on the ‘symbol grounding problem’, i.e., how does a symbol acquires its numerical meaning? The most popular account, the ANS mapping account, assumes that a symbol acquires its numerical meaning by being mapped on a non-verbal and Approximate Number System (ANS. Here, we critically evaluate four arguments that are supposed to support this account, i.e., (1 there is an evolutionary system for approximate number processing, (2 non-symbolic and symbolic number processing show the same behavioral effects, (3 non-symbolic and symbolic numbers activate the same brain regions which are also involved in more advanced calculation and (4 non-symbolic comparison is related to the performance on symbolic mathematics achievement tasks. Based on this evaluation, we conclude that all of these arguments and consequently also the mapping account are questionable. Next we explored less popular alternative, where small numerical symbols are initially mapped on a precise representation and then, in combination with increasing knowledge of the counting list result in an independent and exact symbolic system based on order relations between symbols. We evaluate this account by reviewing evidence on order judgement tasks following the same four arguments. Although further research is necessary, the available evidence so far suggests that this symbol-symbol association account should be considered as a worthy alternative of how symbols acquire their meaning.

  5. The Symbol Grounding Problem Revisited: A Thorough Evaluation of the ANS Mapping Account and the Proposal of an Alternative Account Based on Symbol-Symbol Associations.

    Science.gov (United States)

    Reynvoet, Bert; Sasanguie, Delphine

    2016-01-01

    Recently, a lot of studies in the domain of numerical cognition have been published demonstrating a robust association between numerical symbol processing and individual differences in mathematics achievement. Because numerical symbols are so important for mathematics achievement, many researchers want to provide an answer on the 'symbol grounding problem,' i.e., how does a symbol acquires its numerical meaning? The most popular account, the approximate number system ( ANS ) mapping account , assumes that a symbol acquires its numerical meaning by being mapped on a non-verbal and ANS. Here, we critically evaluate four arguments that are supposed to support this account, i.e., (1) there is an evolutionary system for approximate number processing, (2) non-symbolic and symbolic number processing show the same behavioral effects, (3) non-symbolic and symbolic numbers activate the same brain regions which are also involved in more advanced calculation and (4) non-symbolic comparison is related to the performance on symbolic mathematics achievement tasks. Based on this evaluation, we conclude that all of these arguments and consequently also the mapping account are questionable. Next we explored less popular alternative, where small numerical symbols are initially mapped on a precise representation and then, in combination with increasing knowledge of the counting list result in an independent and exact symbolic system based on order relations between symbols. We evaluate this account by reviewing evidence on order judgment tasks following the same four arguments. Although further research is necessary, the available evidence so far suggests that this symbol-symbol association account should be considered as a worthy alternative of how symbols acquire their meaning.

  6. The number and its symbolism in ancient Greece

    OpenAIRE

    Doc. dr Milena Bogdanović

    2013-01-01

    The symbols are of particular importance. They are the heart of the creative life; rather they are its core. They reveal the secrets of the unconscious mind open to the unknown and the infinite. While talking or gestures while express, we use the symbols, noting it or not. All spiritual science, all art and all art techniques encounter on their way symbols. History confirms that the symbols of each object can be obtained symbolic value, whether natural (rocks, trees, animals, planets, fire, l...

  7. Symbolic and Nonsymbolic Equivalence Tasks: The Influence of Symbols on Students with Mathematics Difficulty

    Science.gov (United States)

    Driver, Melissa K.; Powell, Sarah R.

    2015-01-01

    Students often experience difficulty with attaching meaning to mathematics symbols. Many students react to symbols, such as the equal sign, as a command to "do something" or "write an answer" without reflecting upon the proper relational meaning of the equal sign. One method for assessing equal-sign understanding is through…

  8. Structured brain computing and its learning

    International Nuclear Information System (INIS)

    Ae, Tadashi; Araki, Hiroyuki; Sakai, Keiichi

    1999-01-01

    We have proposed a two-level architecture for brain computing, where two levels are introduced for processing of meta-symbol. At level 1 a conventional pattern recognition is performed, where neural computation is included, and its output gives the meta-symbol which is a symbol enlarged from a symbol to a kind of pattern. At Level 2 an algorithm acquisition is made by using a machine for abstract states. We are also developing the VLSI chips at each level for SBC (Structured Brain Computer) Ver.1.0

  9. Symbolic dynamics of the Lorenz equations

    International Nuclear Information System (INIS)

    Fang Hai-ping; Hao Bailin.

    1994-07-01

    The Lorenz equations are investigated in a wide range of parameters by using the method of symbolic dynamics. First, the systematics of stable periodic orbits in the Lorenz equations is compared with that of the one-dimensional cubic map, which shares the same discrete symmetry with the Lorenz model. The systematics is then ''corrected'' in such a way as to encompass all the known periodic windows of the Lorenz equations with only one exception. Second, in order to justify the above approach and to understand the exceptions, another 1D map with a discontinuity is extracted from an extension of the geometric Lorenz attractor and its symbolic dynamics is constructed. All this has to be done in light of symbolic dynamics of two-dimensional maps. Finally, symbolic dynamics for the actual Poincare return map of the Lorenz equations is constructed in a heuristic way. New periodic windows of the Lorenz equations and their parameters can be predicted from this symbolic dynamics in combination with the 1D cubic map. The extended geometric 2D Lorenz map and the 1D antisymmetric map with a discontinuity describe the topological aspects of the Lorenz equations to high accuracy. (author). 44 refs, 17 figs, 8 tabs

  10. COMPUTING

    CERN Document Server

    M. Kasemann

    Overview In autumn the main focus was to process and handle CRAFT data and to perform the Summer08 MC production. The operational aspects were well covered by regular Computing Shifts, experts on duty and Computing Run Coordination. At the Computing Resource Board (CRB) in October a model to account for service work at Tier 2s was approved. The computing resources for 2009 were reviewed for presentation at the C-RRB. The quarterly resource monitoring is continuing. Facilities/Infrastructure operations Operations during CRAFT data taking ran fine. This proved to be a very valuable experience for T0 workflows and operations. The transfers of custodial data to most T1s went smoothly. A first round of reprocessing started at the Tier-1 centers end of November; it will take about two weeks. The Computing Shifts procedure was tested full scale during this period and proved to be very efficient: 30 Computing Shifts Persons (CSP) and 10 Computing Resources Coordinators (CRC). The shift program for the shut down w...

  11. Anomalous diffusion in a symbolic model

    International Nuclear Information System (INIS)

    Ribeiro, H V; Lenzi, E K; Mendes, R S; Santoro, P A

    2011-01-01

    In this work, we investigate some statistical properties of symbolic sequences generated by a numerical procedure in which the symbols are repeated following the power-law probability density. In this analysis, we consider that the sum of n symbols represents the position of a particle in erratic movement. This approach reveals a rich diffusive scenario characterized by non-Gaussian distribution and, depending on the power-law exponent or the procedure used to build the walker, we may have superdiffusion, subdiffusion or usual diffusion. Additionally, we use the continuous-time random walk framework to compare the analytic results with the numerical data, thereby finding good agreement. Because of its simplicity and flexibility, this model can be a candidate for describing real systems governed by power-law probability densities.

  12. Symbols and schemas in emotional eating

    DEFF Research Database (Denmark)

    Grunert, Suzanne C.

    1995-01-01

    Emotional eating behaviour has been of interest to psychologists exclusively as a disorder. However, evidence suggests that it is a common aspect of normal food habits, initiated by both positive and negative emotions in order to regulate these. T behaviour thus serves to regain or preserve...... the psycho-mental homeostasis. To explain this phenomenon it is first shown which symbolic meanings are associated with eating and foods. The numerous connotations can be grouped into four basic dimensions: Security and pleasure as self-oriented, and status and prestige as socially oriented emotional symbols....... Particularly the aspects of security and pleasure are suggested to be important motivators for emotional eating. How these symbolic meanings relate to eating as a regulatory device for emotions is explained by a schema- theoretical approach distinguishing between automatic adaptation mechanisms and strategic...

  13. Symbolic and Numerical Modeling of Nonlinear Dynamics of Particles in Accelerators

    Science.gov (United States)

    Andrianov, Sergey; Sboeva, Ekaterina

    2018-02-01

    This paper is devoted to one of the methods of symbolic computation, which based on perturbation theory and constructed in the framework of matrix formalism. This method can be used for solving optimization problems and preliminary modeling in accelerator physics. There are presented the main theoretical positions and demonstration the result of this method on example of one of classical problems.

  14. COMPUTING

    CERN Multimedia

    I. Fisk

    2011-01-01

    Introduction CMS distributed computing system performed well during the 2011 start-up. The events in 2011 have more pile-up and are more complex than last year; this results in longer reconstruction times and harder events to simulate. Significant increases in computing capacity were delivered in April for all computing tiers, and the utilisation and load is close to the planning predictions. All computing centre tiers performed their expected functionalities. Heavy-Ion Programme The CMS Heavy-Ion Programme had a very strong showing at the Quark Matter conference. A large number of analyses were shown. The dedicated heavy-ion reconstruction facility at the Vanderbilt Tier-2 is still involved in some commissioning activities, but is available for processing and analysis. Facilities and Infrastructure Operations Facility and Infrastructure operations have been active with operations and several important deployment tasks. Facilities participated in the testing and deployment of WMAgent and WorkQueue+Request...

  15. COMPUTING

    CERN Multimedia

    M. Kasemann

    Overview During the past three months activities were focused on data operations, testing and re-enforcing shift and operational procedures for data production and transfer, MC production and on user support. Planning of the computing resources in view of the new LHC calendar in ongoing. Two new task forces were created for supporting the integration work: Site Commissioning, which develops tools helping distributed sites to monitor job and data workflows, and Analysis Support, collecting the user experience and feedback during analysis activities and developing tools to increase efficiency. The development plan for DMWM for 2009/2011 was developed at the beginning of the year, based on the requirements from the Physics, Computing and Offline groups (see Offline section). The Computing management meeting at FermiLab on February 19th and 20th was an excellent opportunity discussing the impact and for addressing issues and solutions to the main challenges facing CMS computing. The lack of manpower is particul...

  16. COMPUTING

    CERN Multimedia

    P. McBride

    The Computing Project is preparing for a busy year where the primary emphasis of the project moves towards steady operations. Following the very successful completion of Computing Software and Analysis challenge, CSA06, last fall, we have reorganized and established four groups in computing area: Commissioning, User Support, Facility/Infrastructure Operations and Data Operations. These groups work closely together with groups from the Offline Project in planning for data processing and operations. Monte Carlo production has continued since CSA06, with about 30M events produced each month to be used for HLT studies and physics validation. Monte Carlo production will continue throughout the year in the preparation of large samples for physics and detector studies ramping to 50 M events/month for CSA07. Commissioning of the full CMS computing system is a major goal for 2007. Site monitoring is an important commissioning component and work is ongoing to devise CMS specific tests to be included in Service Availa...

  17. Personalized Map Symbol Design Mechanism Based on Linguistics

    Directory of Open Access Journals (Sweden)

    LI Wei

    2015-03-01

    Full Text Available The personalization and intelligence of map service ultimately reflects in their symbol design. By establishing conceptual models of personalized map symbols, a theoretical discussion of the symbols is launched from a perspective which both human perceptions and logistic comprehension are considered in this paper, thus to help analyzing the relationship among geographic objects, map symbols and the interpretation of users and exploring the design basis of personalized map symbol. According to some key points such as relevant linguistic theories, the interpretation of the symbol contexts and symbolic statement syntax, design strategies of personalized map symbols is parsed. Thus, methods and processes of personalized map symbol design are proposed accordingly, following by experiments which could verify the hypothesis.

  18. Influence of alexithymia on symbolic function.

    Science.gov (United States)

    Demers-Desrosiers, L

    1982-01-01

    The archetypal test with nine elements (AT9), specifically designed as a tracer of symbolic function, and the psychosomatic questionnaire of Sifneos et al., for assessment of alexithymia, were both proposed within the context of a psychosomatic consultation to 49 hospitalized patients being investigated for physical symptoms representative of psychosomatic problems at large. The AT9 test enables the utilization of G. Durand's theory of the Anthropological Structures of the Imaginary, and was our theoretical support to engage upon an empirical study in the hope of contributing to the debate about the influence of alexithymia on symbolic function. Faced with the AT9 aim of having to create a mythical micro-universe through three tasks: a drawing, a story, and answers to a questionnaire, the patients exhibited different behaviors. 13 of 49 patients were found not to be alexithymic, and their symbolic function was totally comparable to a normal population. The other 36 patients were found to be alexithymic in increasing degrees, and the symbolic function was found to be abnormal in all the protocols studied. The greatest abnormality was seen in patients who scored 7-8 on the alexithymia scale where 12 of the 18 protocols showed no evidence whatsoever of a mythical micro-universe. We suggest that alexithymia does influence the symbolic function and disorganizes it the more one is alexithymic. Also depending on the type of symbolic function put forth, we would like to propose graphic documents to illustrate Freyberger's intuition about a distinction to be made within the alexithymic population between a primary and secondary form.

  19. Carrier and symbol synchronization system performance study

    Science.gov (United States)

    Lindsey, W. C.

    1976-01-01

    Results pertinent to predicting the performance of convolutionally encoded binary phase-shift keyed communication links were presented. The details of the development are provided in four sections. These sections are concerned with developing the bit error probability performance degradations due to PN despreading by a time-shared delay locked loop, the Costas demodulation process, symbol synchronization effects and cycle slipping phenomena in the Costas loop. In addition, Costas cycle slipping probabilities are studied as functions of Doppler count time and signal-to-noise conditions. The effect of cycle slipping in the symbol synchronizer is also studied as a function of channel Doppler and other frequency uncertainties.

  20. Waterloo Workshop on Computer Algebra

    CERN Document Server

    Zima, Eugene; WWCA-2016; Advances in computer algebra : in honour of Sergei Abramov's' 70th birthday

    2018-01-01

    This book discusses the latest advances in algorithms for symbolic summation, factorization, symbolic-numeric linear algebra and linear functional equations. It presents a collection of papers on original research topics from the Waterloo Workshop on Computer Algebra (WWCA-2016), a satellite workshop of the International Symposium on Symbolic and Algebraic Computation (ISSAC’2016), which was held at Wilfrid Laurier University (Waterloo, Ontario, Canada) on July 23–24, 2016.   This workshop and the resulting book celebrate the 70th birthday of Sergei Abramov (Dorodnicyn Computing Centre of the Russian Academy of Sciences, Moscow), whose highly regarded and inspirational contributions to symbolic methods have become a crucial benchmark of computer algebra and have been broadly adopted by many Computer Algebra systems.

  1. Optical MSD symbolic substitution system based on a higher ordered rule

    Science.gov (United States)

    Reddy, A. K.; Mallikarjun, Tatipamula; Raina, J. P.

    1992-12-01

    The advantages provided by Photonic Computing has been well documented. An Optical arithmetic processor has to take full advantage of the massive parallelism in optical signals. Such a processor, using the Modified - Signed - Digit (MSD) number . (i) representation, has been presented here based (2) on the symbolic substitution 1ogi. The higher order symbolic substitution rules are formulated for the addition operation, which is carried out in just two steps. Based on the addition operation, the other arithmetic operations - subtraction, multiplication and division - are implemented. Finally, the usefulness of this MSD system is studied.

  2. COMPUTING

    CERN Multimedia

    I. Fisk

    2013-01-01

    Computing activity had ramped down after the completion of the reprocessing of the 2012 data and parked data, but is increasing with new simulation samples for analysis and upgrade studies. Much of the Computing effort is currently involved in activities to improve the computing system in preparation for 2015. Operations Office Since the beginning of 2013, the Computing Operations team successfully re-processed the 2012 data in record time, not only by using opportunistic resources like the San Diego Supercomputer Center which was accessible, to re-process the primary datasets HTMHT and MultiJet in Run2012D much earlier than planned. The Heavy-Ion data-taking period was successfully concluded in February collecting almost 500 T. Figure 3: Number of events per month (data) In LS1, our emphasis is to increase efficiency and flexibility of the infrastructure and operation. Computing Operations is working on separating disk and tape at the Tier-1 sites and the full implementation of the xrootd federation ...

  3. Children’s Non-symbolic, Symbolic Addition and Their Mapping Capacity at 4–7 Years Old

    Directory of Open Access Journals (Sweden)

    Yanjun Li

    2017-07-01

    Full Text Available The study aimed to examine the developmental trajectories of non-symbolic and symbolic addition capacities in children and the mapping ability between these two. We assessed 106 4- to 7-year-old children and found that 4-year-olds were able to do non-symbolic addition but not symbolic addition. Five-year-olds and older were able to do symbolic addition and their performance in symbolic addition exceeded non-symbolic addition in grade 1 (approximate age 7. These results suggested non-symbolic addition ability emerges earlier and is less affected by formal mathematical education than symbolic addition. Meanwhile, we tested children’s bi-directional mapping ability using a novel task and found that children were able to map between symbolic and non-symbolic representations of number at age 5. Their ability in mapping non-symbolic to symbolic number became more proficient in grade 1 (approximate age 7. This suggests children at age 7 have developed a relatively mature symbolic representation system.

  4. Children’s Non-symbolic, Symbolic Addition and Their Mapping Capacity at 4–7 Years Old

    Science.gov (United States)

    Li, Yanjun; Zhang, Meng; Chen, Yinghe; Zhu, Xiaoshuang; Deng, Zhijun; Yan, Shijia

    2017-01-01

    The study aimed to examine the developmental trajectories of non-symbolic and symbolic addition capacities in children and the mapping ability between these two. We assessed 106 4- to 7-year-old children and found that 4-year-olds were able to do non-symbolic addition but not symbolic addition. Five-year-olds and older were able to do symbolic addition and their performance in symbolic addition exceeded non-symbolic addition in grade 1 (approximate age 7). These results suggested non-symbolic addition ability emerges earlier and is less affected by formal mathematical education than symbolic addition. Meanwhile, we tested children’s bi-directional mapping ability using a novel task and found that children were able to map between symbolic and non-symbolic representations of number at age 5. Their ability in mapping non-symbolic to symbolic number became more proficient in grade 1 (approximate age 7). This suggests children at age 7 have developed a relatively mature symbolic representation system. PMID:28769845

  5. Application of symbolic manipulation for solving partial differential equation with finite element method

    International Nuclear Information System (INIS)

    Lee, Goung Jin; Chang, Soon Heung

    1988-01-01

    In solving partial differential equations using finite element method, the great parts of the computing time is taken to calculate the local element matrices. Also the much programming efforts are taken for the local element matrices calculations. To reduce the computing time and the efforts of programming, local elements matrices are calculated by symbolic manipulation method. In this study, symbolic manipulation code REDUCE 3.2 is used. As a results, Fortran subroutine form of local element matrices package is obtained. Using this package, programming efforts would be much reduced. Also the computing time is greatly reduced using the developed package. As a conclusion, it can be said that the developed method can be used to solve the partial differential equation with the less computing times and the less programming efforts than the conventional method

  6. Synthesized size-sound sound symbolism

    NARCIS (Netherlands)

    Lockwood, G.F.; Hagoort, P.; Dingemanse, M.; Papafragou, A.; Grodner, D.; Mirman, D.; Trueswell, J.

    2016-01-01

    Studies of sound symbolism have shown that people can associate sound and meaning in consistent ways when presented with maximally contrastive stimulus pairs of nonwords such as bouba/kiki (rounded/sharp) or mil/mal (small/big). Recent work has shown the effect extends to antonymic words from

  7. Generating and Solving Symbolic Parity Games

    Directory of Open Access Journals (Sweden)

    Gijs Kant

    2014-07-01

    Full Text Available We present a new tool for verification of modal mu-calculus formulae for process specifications, based on symbolic parity games. It enhances an existing method, that first encodes the problem to a Parameterised Boolean Equation System (PBES and then instantiates the PBES to a parity game. We improved the translation from specification to PBES to preserve the structure of the specification in the PBES, we extended LTSmin to instantiate PBESs to symbolic parity games, and implemented the recursive parity game solving algorithm by Zielonka for symbolic parity games. We use Multi-valued Decision Diagrams (MDDs to represent sets and relations, thus enabling the tools to deal with very large systems. The transition relation is partitioned based on the structure of the specification, which allows for efficient manipulation of the MDDs. We performed two case studies on modular specifications, that demonstrate that the new method has better time and memory performance than existing PBES based tools and can be faster (but slightly less memory efficient than the symbolic model checker NuSMV.

  8. Symbolic approximate time-optimal control

    NARCIS (Netherlands)

    Mazo, Manuel; Tabuada, Paulo

    There is an increasing demand for controller design techniques capable of addressing the complex requirements of today's embedded applications. This demand has sparked the interest in symbolic control where lower complexity models of control systems are used to cater for complex specifications given

  9. Generating and Solving Symbolic Parity Games

    NARCIS (Netherlands)

    Kant, Gijs; van de Pol, Jan Cornelis

    We present a new tool for verification of modal mu-calculus formulae for process specifications, based on symbolic parity games. It enhances an existing method, that first encodes the problem to a Parameterised Boolean Equation System (PBES) and then instantiates the PBES to a parity game. We

  10. 169 DIFFERENT RITUAL SYMBOLS IN IGBO TRADITIONAL ...

    African Journals Online (AJOL)

    (Moslem) fixed feasts in relation to the appearance of the moon. It is very important because it was the moon that guided Mohammed to carry out his job. Without the history and full knowledge of Traditional religion, all the objects of worship such as 'ofo', Amadioha etc will become meaningless. b. Symbols are meaningful ...

  11. Symbols for cockpit displays of traffic information

    Science.gov (United States)

    2009-10-25

    A web-based study assessed pilots ability to learn and remember traffic symbols that may be shown on a Cockpit Display of Traffic Information (CDTI). These displays convey data obtained from Automatic Dependent Surveillance-Broadcast (ADS B) and rela...

  12. The Design of Tactile Thematic Symbols

    Science.gov (United States)

    Lawrence, Megan M.; Lobben, Amy K.

    2011-01-01

    The study reported here investigated the design and legibility of tactile thematic maps, focusing on symbolization and the comprehension of spatial patterns on the maps. The results indicate that discriminable and effective tactile thematic maps can be produced using classed data with a microcapsule paper production method. The participants…

  13. Basic symbol for ionizing radiations (second revision)

    International Nuclear Information System (INIS)

    1992-01-01

    Includes a detailed description of basic symbol for ionizing radiations to be used to prevent about the presence, or possibility of presence, of ionizing radiations (X-ray, gamma radiation, particles, electrons, neutrons and protons), as well as to identify radioactive devices and materials

  14. Driving Symbolic Consumption through Imagined Vertical Movements

    DEFF Research Database (Denmark)

    Ostinelli, Massimiliano; Ringberg, Torsten; Luna, David

    Drawing on theories of embodied cognition and compensatory consumption, we provide evidence that merely imagining oneself moving upward or downward affects preference for symbolic products. Altogether, two studies show that magining taking an elevator down, as opposed to up, decreases self-worth ...

  15. Symbolic generation of finite difference formulas

    International Nuclear Information System (INIS)

    Keller, H.; Pereyra, V.

    1978-01-01

    Tables of coefficients for high order accurate, compact approximations to the first ten derivatives on and at the midpoints of uniform nets are presented. The exact rational weights are generated and tested by means of symbolic manipulation implemented through MACSYMA. These weights are required in the application of deferred corrections to new methods for solving higher order two point boundary value problems

  16. Mythology, Weltanschauung , symbolic universe and states of ...

    African Journals Online (AJOL)

    Mythology can be described both as Weltanschauung and symbolic universe, functioning on all levels of consciousness. Different Weltanschauungen constitute alternative states of consciousness. Compared to secular worldviews, religious worldviews may be described as ASCs. Thanks to our globalised modern societies, ...

  17. Reflection in psychoanalysis: on symbols and metaphors.

    Science.gov (United States)

    Enckell, Henrik

    2010-10-01

    Psychoanalysis is an art of reflection, i.e. it tries to facilitate the subject's retrieval of his own self. The 'material' to be reflected upon consists of the products of human symbolization. But there are two views of reflection. In one, the self is searched in a temporal, structural and procedural 'anterior' (the model of archaeology). In the other the self is to be found in a still evolving meaning process, i.e. it resides in a 'future' (the model of teleology). Both these pictures are common in psychoanalysis. The aim of this paper is to study the figures of symbolization through the archaeology/teleology reflection model. The author tries to show that 'symbol' leans on archaeology while 'metaphor' comprises a teleological conception. In order to show the relevance of this finding, the author draws the outlines of both an archaeological and a teleological model in psychoanalysis. It is stated that the former builds on an inherent symbol model while the figure for the latter is metaphor. Copyright © 2010 Institute of Psychoanalysis.

  18. Multiple-Symbol Differential Detection Of MPSK

    Science.gov (United States)

    Divsalar, Dariush; Simon, Marvin K.

    1991-01-01

    Multiple-symbol differential detection proposed for reception of radio-frequency signals modulated by mutliple-phase-shift keying (MPSK). Offers advantage of less complexity in not requiring equipment to acquire and track carrier signal. Performance approaches that of ideal coherent detection. Applicable to coded as well as uncoded MPSK, and to other forms of modulation.

  19. Berezin symbols and Borel summability | Garayev | Quaestiones ...

    African Journals Online (AJOL)

    We prove in terms of so-called Berezin symbols some theorems for Borel summability method for sequences and series of complex numbers. Namely, we characterize the Borel convergent sequences and series; prove regularity of Borel summability method, and prove a new Tauberian type theorem for Borel summability.

  20. A Simple Sketch Symbolizing Self-Reliance

    Centers for Disease Control (CDC) Podcasts

    2017-02-16

    EID Managing Editor, Byron Breedlove, reads his cover art story, A Simple Sketch Symbolizing Self-Reliance.  Created: 2/16/2017 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 2/16/2017.

  1. There Is More to Mathematics than Symbols

    Science.gov (United States)

    Rivera, Ferdinand

    2010-01-01

    When teachers provide students with every opportunity to visually understand a mathematical concept, process, definition, or notation, they allow them to construct and manipulate relevant and useful images in their minds. Visual understanding has a dynamic character that they do not easily develop with alphanumeric symbols alone despite the…

  2. Symbolic Interactionism and Social Action Theory

    Science.gov (United States)

    Morrione, Thomas J.

    1975-01-01

    An explanation and elaboration of existing theory on interaction, this article describes a point of convergence between Parsons' Voluntaristic Theory of Action and Blumer's conceptualization of Symbolic Interactionism and develops specific problems of divergence in these normative and interpretive models of interaction. (JC)

  3. Symbol Sense Behavior in Digital Activities

    Science.gov (United States)

    Bokhove, Christian; Drijvers, Paul

    2010-01-01

    The algebraic expertise that mathematics education is aiming for includes both procedural skills and conceptual understanding. To capture the latter, notions such as symbol sense, gestalt view and visual salience have been developed. We wonder if digital activities can be designed that not only require procedural algebraic skills, but also invite…

  4. Understanding teacher identity from a symbolic interactionist ...

    African Journals Online (AJOL)

    leaving, and multitasking are theorised from a symbolic interactionist framework, using constructs such as situational, social and personal identity. The major finding of this inquiry speaks to the power of the working context, the educational landscape, which appears to be a much stronger force in the development of teacher ...

  5. SYMBOLISM IN THE SAMARIA IVORIES AND ARCHITECTURE

    African Journals Online (AJOL)

    Faculty of Theology, University of the Free State, P.O. Box 339, Bloem fontein. 9300. e-mail: daanpienaar@telkomsa.net. D.N. Pienaar. SYMBOLISM IN THE SAMARIA. IVORIES AND ARCHITECTURE. ABSTRACT. Situated at the crossroads of great nations, the Land of Israel was exposed to numerous ex- ternal influences.

  6. Symbolic Number Comparison Is Not Processed by the Analog Number System: Different Symbolic and Non-symbolic Numerical Distance and Size Effects

    Directory of Open Access Journals (Sweden)

    Attila Krajcsi

    2018-02-01

    Full Text Available HIGHLIGHTSWe test whether symbolic number comparison is handled by an analog noisy system.Analog system model has systematic biases in describing symbolic number comparison.This suggests that symbolic and non-symbolic numbers are processed by different systems.Dominant numerical cognition models suppose that both symbolic and non-symbolic numbers are processed by the Analog Number System (ANS working according to Weber's law. It was proposed that in a number comparison task the numerical distance and size effects reflect a ratio-based performance which is the sign of the ANS activation. However, increasing number of findings and alternative models propose that symbolic and non-symbolic numbers might be processed by different representations. Importantly, alternative explanations may offer similar predictions to the ANS prediction, therefore, former evidence usually utilizing only the goodness of fit of the ANS prediction is not sufficient to support the ANS account. To test the ANS model more rigorously, a more extensive test is offered here. Several properties of the ANS predictions for the error rates, reaction times, and diffusion model drift rates were systematically analyzed in both non-symbolic dot comparison and symbolic Indo-Arabic comparison tasks. It was consistently found that while the ANS model's prediction is relatively good for the non-symbolic dot comparison, its prediction is poorer and systematically biased for the symbolic Indo-Arabic comparison. We conclude that only non-symbolic comparison is supported by the ANS, and symbolic number comparisons are processed by other representation.

  7. COMPUTING

    CERN Multimedia

    M. Kasemann P. McBride Edited by M-C. Sawley with contributions from: P. Kreuzer D. Bonacorsi S. Belforte F. Wuerthwein L. Bauerdick K. Lassila-Perini M-C. Sawley

    Introduction More than seventy CMS collaborators attended the Computing and Offline Workshop in San Diego, California, April 20-24th to discuss the state of readiness of software and computing for collisions. Focus and priority were given to preparations for data taking and providing room for ample dialog between groups involved in Commissioning, Data Operations, Analysis and MC Production. Throughout the workshop, aspects of software, operating procedures and issues addressing all parts of the computing model were discussed. Plans for the CMS participation in STEP’09, the combined scale testing for all four experiments due in June 2009, were refined. The article in CMS Times by Frank Wuerthwein gave a good recap of the highly collaborative atmosphere of the workshop. Many thanks to UCSD and to the organizers for taking care of this workshop, which resulted in a long list of action items and was definitely a success. A considerable amount of effort and care is invested in the estimate of the comput...

  8. COMPUTING

    CERN Multimedia

    I. Fisk

    2010-01-01

    Introduction It has been a very active quarter in Computing with interesting progress in all areas. The activity level at the computing facilities, driven by both organised processing from data operations and user analysis, has been steadily increasing. The large-scale production of simulated events that has been progressing throughout the fall is wrapping-up and reprocessing with pile-up will continue. A large reprocessing of all the proton-proton data has just been released and another will follow shortly. The number of analysis jobs by users each day, that was already hitting the computing model expectations at the time of ICHEP, is now 33% higher. We are expecting a busy holiday break to ensure samples are ready in time for the winter conferences. Heavy Ion An activity that is still in progress is computing for the heavy-ion program. The heavy-ion events are collected without zero suppression, so the event size is much large at roughly 11 MB per event of RAW. The central collisions are more complex and...

  9. Knowledge-Based Functional-Symbol Understanding In Electronic Circuit Diagram Interpretation

    Science.gov (United States)

    Huang, C. L.; Tou, J. T.

    1986-03-01

    The AUTORED system is a computer-based system for automatic reading of electronic circuit diagrams, which was developed several years ago. This paper presents some of our new results in AUTORED research. The design of AUTORED consists of two major components: automatic interpretation of electronic diagrams, and organization of interpretation results into a knowledge base for CAD applications. An electronic circuit diagram may be segmented into three parts which are the graphical functional symbols, the connection line segments, and the denotations. New techniques for extracting symbols and denotations from the circuit diagram are presented in this paper. These techniques are designed for junction and corner extraction, line segment tracing and linking, line segment classification, connection-line segment removal and blocking, symbol locating and denotation character grouping. A knowledge base is developed to facilitate the tracing, template-matching, and categorization processes.

  10. Graphical user interfaces for symbol-oriented database visualization and interaction

    Science.gov (United States)

    Brinkschulte, Uwe; Siormanolakis, Marios; Vogelsang, Holger

    1997-04-01

    In this approach, two basic services designed for the engineering of computer based systems are combined: a symbol-oriented man-machine-service and a high speed database-service. The man-machine service is used to build graphical user interfaces (GUIs) for the database service; these interfaces are stored using the database service. The idea is to create a GUI-builder and a GUI-manager for the database service based upon the man-machine service using the concept of symbols. With user-definable and predefined symbols, database contents can be visualized and manipulated in a very flexible and intuitive way. Using the GUI-builder and GUI-manager, a user can build and operate its own graphical user interface for a given database according to its needs without writing a single line of code.

  11. Symbolic Interaction and Applied Social Research

    Science.gov (United States)

    Kotarba, Joseph A.

    2014-01-01

    In symbolic interaction, a traditional yet unfortunate and unnecessary distinction has been made between basic and applied research. The argument has been made that basic research is intended to generate new knowledge, whereas applied research is intended to apply knowledge to the solution of practical (social and organizational) problems. I will argue that the distinction between basic and applied research in symbolic interaction is outdated and dysfunctional. The masters of symbolic interactionist thought have left us a proud legacy of shaping their scholarly thinking and inquiry in response to and in light of practical issues of the day (e.g., Znaniecki, and Blumer). Current interactionist work continues this tradition in topical areas such as social justice studies. Applied research, especially in term of evaluation and needs assessment studies, can be designed to serve both basic and applied goals. Symbolic interaction provides three great resources to do this. The first is its orientation to dynamic sensitizing concepts that direct research and ask questions instead of supplying a priori and often impractical answers. The second is its orientation to qualitative methods, and appreciation for the logic of grounded theory. The third is interactionism’s overall holistic approach to interfacing with the everyday life world. The primary illustrative case here is the qualitative component of the evaluation of an NIH-funded, translational medical research program. The qualitative component has provided interactionist-inspired insights into translational research, such as examining cultural change in medical research in terms of changes in the form and content of formal and informal discourse among scientists; delineating the impact of significant symbols such as "my lab" on the social organization of science; and appreciating the essence of the self-concept "scientist" on the increasingly bureaucratic and administrative identities of medical researchers. This

  12. A symbolic methodology to improve disassembly process design.

    Science.gov (United States)

    Rios, Pedro; Blyler, Leslie; Tieman, Lisa; Stuart, Julie Ann; Grant, Ed

    2003-12-01

    Millions of end-of-life electronic components are retired annually due to the proliferation of new models and their rapid obsolescence. The recovery of resources such as plastics from these goods requires their disassembly. The time required for each disassembly and its associated cost is defined by the operator's familiarity with the product design and its complexity. Since model proliferation serves to complicate an operator's learning curve, it is worthwhile to investigate the benefits to be gained in a disassembly operator's preplanning process. Effective disassembly process design demands the application of green engineering principles, such as those developed by Anastas and Zimmerman (Environ. Sci. Technol. 2003, 37, 94A-101A), which include regard for product complexity, structural commonality, separation energy, material value, and waste prevention. This paper introduces the concept of design symbolsto help the operator more efficiently survey product complexity with respect to location and number of fasteners to remove a structure that is common to all electronics: the housing. With a sample of 71 different computers, printers, and monitors, we demonstrate that appropriate symbols reduce the total disassembly planning time by 13.2 min. Such an improvement could well make efficient the separation of plastic that would otherwise be destined for waste-to-energy or landfill. The symbolic methodology presented may also improve Design for Recycling and Design for Maintenance and Support.

  13. ASAP - A symbolic algebra package for accelerator design

    International Nuclear Information System (INIS)

    Bozoki, E.; Friedman, A.; Ben-Zvi, I.

    1991-01-01

    The design of a modern accelerator is a complicated task that involves the integration of many devices. As a consequence many parameters must be optimized in order to achieve a satisfactory result. Even the design of a simple subsystem, such as a bending system, requires that the designer will pick a successful choice from a wide range of alternatives. Usually, the task is too large to allow an analytical design, and the designer has to use a computer code (such as MAD or TRANSPORT) to simulate the system and numerically find the desired conditions. The disadvantages of this numerical method are, that (1) the solutions, i.e. the choice of the parameters may or may not be optimal and (2) each change in a parameter requires to recalculate the whole system, thus a detailed design is lengthy and costly. The authors report the conceptual design and primary implementation steps of a symbolic algebra program based on MACSYMA for the design of accelerators, storage rings and transport lines. The motivation for using symbolic algebra is discussed and a design case is presented that shows the advantage of this approach

  14. 46 CFR 50.10-25 - Coast Guard Symbol.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Coast Guard Symbol. 50.10-25 Section 50.10-25 Shipping... Definition of Terms Used in This Subchapter § 50.10-25 Coast Guard Symbol. (a) The term Coast Guard Symbol... impression of the Coast Guard Symbol for stamping nameplates and specimens is shown in Figure 50.10-25(b...

  15. Intuitiveness of Symbol Features for Air Traffic Management

    Science.gov (United States)

    Ngo, Mary Kim; Vu, Kim-Phuong L.; Thorpe, Elaine; Battiste, Vernol; Strybel, Thomas Z.

    2012-01-01

    We present the results of two online surveys asking participants to indicate what type of air traffic information might be conveyed by a number of symbols and symbol features (color, fill, text, and shape). The results of this initial study suggest that the well-developed concepts of ownership, altitude, and trajectory are readily associated with certain symbol features, while the relatively novel concept of equipage was not clearly associated with any specific symbol feature.

  16. Examining the Nexus between Grounded Theory and Symbolic Interactionism

    OpenAIRE

    P. Jane Milliken RN, PhD; Rita Schreiber RN, DNS

    2012-01-01

    Grounded theory is inherently symbolic interactionist; however, not all grounded theory researchers appreciate its importance or benefit from its influence. Elsewhere, we have written about the intrinsic relationship between grounded theory and symbolic interactionism, highlighting the silent, fundamental contribution of symbolic interactionism to the methodology. At the same time, there are significant insights to be had by bringing a conscious awareness of the philosophy of symbolic interac...

  17. COMPUTING

    CERN Multimedia

    P. McBride

    It has been a very active year for the computing project with strong contributions from members of the global community. The project has focused on site preparation and Monte Carlo production. The operations group has begun processing data from P5 as part of the global data commissioning. Improvements in transfer rates and site availability have been seen as computing sites across the globe prepare for large scale production and analysis as part of CSA07. Preparations for the upcoming Computing Software and Analysis Challenge CSA07 are progressing. Ian Fisk and Neil Geddes have been appointed as coordinators for the challenge. CSA07 will include production tests of the Tier-0 production system, reprocessing at the Tier-1 sites and Monte Carlo production at the Tier-2 sites. At the same time there will be a large analysis exercise at the Tier-2 centres. Pre-production simulation of the Monte Carlo events for the challenge is beginning. Scale tests of the Tier-0 will begin in mid-July and the challenge it...

  18. COMPUTING

    CERN Multimedia

    M. Kasemann

    CCRC’08 challenges and CSA08 During the February campaign of the Common Computing readiness challenges (CCRC’08), the CMS computing team had achieved very good results. The link between the detector site and the Tier0 was tested by gradually increasing the number of parallel transfer streams well beyond the target. Tests covered the global robustness at the Tier0, processing a massive number of very large files and with a high writing speed to tapes.  Other tests covered the links between the different Tiers of the distributed infrastructure and the pre-staging and reprocessing capacity of the Tier1’s: response time, data transfer rate and success rate for Tape to Buffer staging of files kept exclusively on Tape were measured. In all cases, coordination with the sites was efficient and no serious problem was found. These successful preparations prepared the ground for the second phase of the CCRC’08 campaign, in May. The Computing Software and Analysis challen...

  19. COMPUTING

    CERN Multimedia

    I. Fisk

    2011-01-01

    Introduction It has been a very active quarter in Computing with interesting progress in all areas. The activity level at the computing facilities, driven by both organised processing from data operations and user analysis, has been steadily increasing. The large-scale production of simulated events that has been progressing throughout the fall is wrapping-up and reprocessing with pile-up will continue. A large reprocessing of all the proton-proton data has just been released and another will follow shortly. The number of analysis jobs by users each day, that was already hitting the computing model expectations at the time of ICHEP, is now 33% higher. We are expecting a busy holiday break to ensure samples are ready in time for the winter conferences. Heavy Ion The Tier 0 infrastructure was able to repack and promptly reconstruct heavy-ion collision data. Two copies were made of the data at CERN using a large CASTOR disk pool, and the core physics sample was replicated ...

  20. COMPUTING

    CERN Multimedia

    M. Kasemann

    Introduction More than seventy CMS collaborators attended the Computing and Offline Workshop in San Diego, California, April 20-24th to discuss the state of readiness of software and computing for collisions. Focus and priority were given to preparations for data taking and providing room for ample dialog between groups involved in Commissioning, Data Operations, Analysis and MC Production. Throughout the workshop, aspects of software, operating procedures and issues addressing all parts of the computing model were discussed. Plans for the CMS participation in STEP’09, the combined scale testing for all four experiments due in June 2009, were refined. The article in CMS Times by Frank Wuerthwein gave a good recap of the highly collaborative atmosphere of the workshop. Many thanks to UCSD and to the organizers for taking care of this workshop, which resulted in a long list of action items and was definitely a success. A considerable amount of effort and care is invested in the estimate of the co...

  1. COMPUTING

    CERN Multimedia

    I. Fisk

    2012-01-01

    Introduction Computing continued with a high level of activity over the winter in preparation for conferences and the start of the 2012 run. 2012 brings new challenges with a new energy, more complex events, and the need to make the best use of the available time before the Long Shutdown. We expect to be resource constrained on all tiers of the computing system in 2012 and are working to ensure the high-priority goals of CMS are not impacted. Heavy ions After a successful 2011 heavy-ion run, the programme is moving to analysis. During the run, the CAF resources were well used for prompt analysis. Since then in 2012 on average 200 job slots have been used continuously at Vanderbilt for analysis workflows. Operations Office As of 2012, the Computing Project emphasis has moved from commissioning to operation of the various systems. This is reflected in the new organisation structure where the Facilities and Data Operations tasks have been merged into a common Operations Office, which now covers everything ...

  2. COMPUTING

    CERN Multimedia

    M. Kasemann

    Introduction During the past six months, Computing participated in the STEP09 exercise, had a major involvement in the October exercise and has been working with CMS sites on improving open issues relevant for data taking. At the same time operations for MC production, real data reconstruction and re-reconstructions and data transfers at large scales were performed. STEP09 was successfully conducted in June as a joint exercise with ATLAS and the other experiments. It gave good indication about the readiness of the WLCG infrastructure with the two major LHC experiments stressing the reading, writing and processing of physics data. The October Exercise, in contrast, was conducted as an all-CMS exercise, where Physics, Computing and Offline worked on a common plan to exercise all steps to efficiently access and analyze data. As one of the major results, the CMS Tier-2s demonstrated to be fully capable for performing data analysis. In recent weeks, efforts were devoted to CMS Computing readiness. All th...

  3. COMPUTING

    CERN Multimedia

    I. Fisk

    2010-01-01

    Introduction The first data taking period of November produced a first scientific paper, and this is a very satisfactory step for Computing. It also gave the invaluable opportunity to learn and debrief from this first, intense period, and make the necessary adaptations. The alarm procedures between different groups (DAQ, Physics, T0 processing, Alignment/calibration, T1 and T2 communications) have been reinforced. A major effort has also been invested into remodeling and optimizing operator tasks in all activities in Computing, in parallel with the recruitment of new Cat A operators. The teams are being completed and by mid year the new tasks will have been assigned. CRB (Computing Resource Board) The Board met twice since last CMS week. In December it reviewed the experience of the November data-taking period and could measure the positive improvements made for the site readiness. It also reviewed the policy under which Tier-2 are associated with Physics Groups. Such associations are decided twice per ye...

  4. Cognitive Deficits and Symbolic Play in Preschoolers with Autism

    Science.gov (United States)

    Lam, Yan Grace; Yeung, Siu-sze Susanna

    2012-01-01

    This study investigated symbolic play in 12 children with autism and 12 children with typical development and compared theories that consider either theory of mind, executive function or central coherence to be causally involved in the development of symbolic play in autism. Children with autism demonstrated significantly less symbolic play than…

  5. 7 CFR 91.102 - Form of official identification symbols.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Form of official identification symbols. 91.102... LABORATORY TESTING PROGRAMS SERVICES AND GENERAL INFORMATION Designation of Approved Symbols for Identification of Commodities Officially Tested By AMS § 91.102 Form of official identification symbols. Two...

  6. 21 CFR 1302.03 - Symbol required; exceptions.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 9 2010-04-01 2010-04-01 false Symbol required; exceptions. 1302.03 Section 1302... REQUIREMENTS FOR CONTROLLED SUBSTANCES § 1302.03 Symbol required; exceptions. (a) Each commercial container of... § 1308.31 of this chapter) shall have printed on the label the symbol designating the schedule in which...

  7. 49 CFR Appendix B to Part 172 - Trefoil Symbol

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Trefoil Symbol B Appendix B to Part 172... SECURITY PLANS Pt. 172, App. B Appendix B to Part 172—Trefoil Symbol 1. Except as provided in paragraph 2 of this appendix, the trefoil symbol required for RADIOACTIVE labels and placards and required to be...

  8. 17 CFR 232.306 - Foreign language documents and symbols.

    Science.gov (United States)

    2010-04-01

    ... symbols. 232.306 Section 232.306 Commodity and Securities Exchanges SECURITIES AND EXCHANGE COMMISSION... § 232.306 Foreign language documents and symbols. (a) All electronic filings and submissions must be in... words or letters in the English language rather than representative symbols, except that HTML documents...

  9. Different ritual symbols in Igbo traditional religion and their functions ...

    African Journals Online (AJOL)

    Symbols change in their value and functions and as a result of the changes in cultural appreciation. The change in the emphasis on the role of symbolism in general is partly consequence of cultural intellectual, social and economic transformation. All our actions are symbolic and we cannot do without interacting with each ...

  10. 40 CFR 60.311 - Definitions and symbols.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 6 2010-07-01 2010-07-01 false Definitions and symbols. 60.311 Section... Furniture § 60.311 Definitions and symbols. (a) All terms used in this subpart not defined below are given... applied coating solids, emitted from a metal furniture surface coating operation. (b) All symbols used in...

  11. 40 CFR 60.581 - Definitions and symbols.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 6 2010-07-01 2010-07-01 false Definitions and symbols. 60.581 Section... Coating and Printing § 60.581 Definitions and symbols. (a) All terms used in this subpart, not defined... solvent vapors emitted from the flexible vinyl or urethane rotogravure printing line. (b) All symbols used...

  12. Visual Symbolism in Contemporary Theatre Directing in Nigeria ...

    African Journals Online (AJOL)

    This difference is cropped from the director's perception, conception, imaginative and creative impetus. Visual symbolism in the theatre as a medium traverse forms, textures, symbols, lines, lighting, circles and balance in creating an everlasting theatre experience. Visual symbolism is influenced by style, concept, forms, ...

  13. 40 CFR 60.441 - Definitions and symbols.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 6 2010-07-01 2010-07-01 false Definitions and symbols. 60.441 Section... Label Surface Coating Operations § 60.441 Definitions and symbols. (a) Except as otherwise required by... volatile organic compound. (b) All symbols used in this subpart not defined below are given meaning in the...

  14. 32 CFR 310.42 - Reports control symbol.

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Reports control symbol. 310.42 Section 310.42... PROGRAM DOD PRIVACY PROGRAM Reports § 310.42 Reports control symbol. Any report established by this subpart in support of the Privacy Program shall be assigned Report Control Symbol DD-COMP(A)1379. ...

  15. 50 CFR 85.43 - Signs and symbols.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 6 2010-10-01 2010-10-01 false Signs and symbols. 85.43 Section 85.43... Use/Acceptance of Funds § 85.43 Signs and symbols. (a) Signs. Facilities must display appropriate... for boaters to get additional information or to report an inoperable facility. (b) Pumpout symbol. (1...

  16. 40 CFR 90.403 - Symbols, acronyms, and abbreviations.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Symbols, acronyms, and abbreviations... Gaseous Exhaust Test Procedures § 90.403 Symbols, acronyms, and abbreviations. (a) The acronyms and abbreviations in § 90.5 apply to this subpart. (b) The symbols in Table 1 in Appendix A to Subpart D apply to...

  17. 40 CFR 91.403 - Symbols and abbreviations.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Symbols and abbreviations. 91.403 Section 91.403 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS... Symbols and abbreviations. (a) The abbreviations in § 91.5 apply to this subpart. (b) The symbols in Table...

  18. The Symbolic Order of School: Waldorf and College Prep.

    Science.gov (United States)

    Henry, Mary E.

    Schools embody a "symbolic order" communicated through school rituals and social and symbolic relationships. Schools possess a moral vision, a system of values and norms that they wish to develop in students. This paper compares the symbolic order of two independent schools, one a traditional college preparatory school (preschool-grade 12), the…

  19. 78 FR 23508 - Use of Certain Symbols in Labeling

    Science.gov (United States)

    2013-04-19

    ... recognition process. FDA will consider recognizing symbols contained in standards developed by SDOs that... FDA, used within any parameters of such recognition, and be explained in a symbols glossary that... 809 [Docket No. FDA-2013-N-0125] RIN 0910-AG74 Use of Certain Symbols in Labeling AGENCY: Food and...

  20. SYNERGY OF ULI SYMBOLS AND TEXTILES: AN EXPLORATION ...

    African Journals Online (AJOL)

    NKEM

    signs and symbols are merely objects of communal enjoyment rather than signs and symbols of .... ethno-aesthetics to contemporary crafts and products not only bares new frontiers of creativity, but assumes a new way ... piece is highly symbolic which borders on global issues where hunger and starvation, natural deserter ...

  1. Special Issue of Higher-Order and Symbolic Computation

    DEFF Research Database (Denmark)

    2003-01-01

    method for designing compositional semantics of programs in a way that enables reasoning about program transformations that may alter the termination behavior of a program. A preliminary version of this work was presented at PEPM'02. "Path Dependent Analysis of Logic Programs" presents a framework...... for designing context-sensitive abstract interpretations of logic programs. It introduces call strings of fixed length and the corresponding abstract domains. The resulting analysis approximates the context in which predicates are called. A preliminary version of this work was presented at PEPM'02. "Automatic...

  2. Common Lisp a gentle introduction to symbolic computation

    CERN Document Server

    Touretzky, David S

    2013-01-01

    This highly accessible introduction to Lisp is suitable both for novices approaching their first programming language and experienced programmers interested in exploring a key tool for artificial intelligence research. The text offers clear, reader-friendly explanations of such essential concepts as cons cell structures, evaluation rules, programs as data, and recursive and applicative programming styles. The treatment incorporates several innovative instructional devices, such as the use of function boxes in the first two chapters to visually distinguish functions from data, use of evaltrace

  3. Design research in statistics education : on symbolizing and computer tools

    NARCIS (Netherlands)

    Bakker, A.

    2004-01-01

    The present knowledge society requires statistical literacy-the ability to interpret, critically evaluate, and communicate about statistical information and messages (Gal, 2002). However, research shows that students generally do not gain satisfactory statistical understanding. The research

  4. Special issue of Higher-Order and Symbolic Computation

    DEFF Research Database (Denmark)

    The present issue is dedicated to Partial Evaluation and Semantics-Based Program Manipulation. Its first two articles were solicited from papers presented at PEPM 02, the 2002 ACMSIGPLANWorkshop on Partial Evaluation and Semantics-Based Program Manipulation [2], and its last two articles were...... solicited from papers presented at ASIAPEPM 02, the 2002 SIGPLAN Symposium on Partial Evaluation and Semantics-Based Program Manipulation [1]. The four articles were subjected to the usual process of journal reviewing. "Cost-Augmented Partial Evaluation of Functional Logic Programs" extends previous...... Circular Programs to Deforest in Accumulating Parameters" proposes a technique to eliminate intermediate data structures from consumer/producer pairs with accumulators. A key problem of accumulators is that they capture intermediate data and require multiple traversals. The author solves this problem...

  5. Symbolic computation and abundant travelling wave solutions to ...

    Indian Academy of Sciences (India)

    The method is reliable and useful, and gives more general exact travelling wave solutions than the existing methods. The solutions obtained are in the form of hyperbolic, trigonometricand rational functions including solitary, singular and periodic solutions which have many potential applications in physical science and ...

  6. COMPUTING

    CERN Multimedia

    Matthias Kasemann

    Overview The main focus during the summer was to handle data coming from the detector and to perform Monte Carlo production. The lessons learned during the CCRC and CSA08 challenges in May were addressed by dedicated PADA campaigns lead by the Integration team. Big improvements were achieved in the stability and reliability of the CMS Tier1 and Tier2 centres by regular and systematic follow-up of faults and errors with the help of the Savannah bug tracking system. In preparation for data taking the roles of a Computing Run Coordinator and regular computing shifts monitoring the services and infrastructure as well as interfacing to the data operations tasks are being defined. The shift plan until the end of 2008 is being put together. User support worked on documentation and organized several training sessions. The ECoM task force delivered the report on “Use Cases for Start-up of pp Data-Taking” with recommendations and a set of tests to be performed for trigger rates much higher than the ...

  7. COMPUTING

    CERN Multimedia

    P. MacBride

    The Computing Software and Analysis Challenge CSA07 has been the main focus of the Computing Project for the past few months. Activities began over the summer with the preparation of the Monte Carlo data sets for the challenge and tests of the new production system at the Tier-0 at CERN. The pre-challenge Monte Carlo production was done in several steps: physics generation, detector simulation, digitization, conversion to RAW format and the samples were run through the High Level Trigger (HLT). The data was then merged into three "Soups": Chowder (ALPGEN), Stew (Filtered Pythia) and Gumbo (Pythia). The challenge officially started when the first Chowder events were reconstructed on the Tier-0 on October 3rd. The data operations teams were very busy during the the challenge period. The MC production teams continued with signal production and processing while the Tier-0 and Tier-1 teams worked on splitting the Soups into Primary Data Sets (PDS), reconstruction and skimming. The storage sys...

  8. COMPUTING

    CERN Document Server

    2010-01-01

    Introduction Just two months after the “LHC First Physics” event of 30th March, the analysis of the O(200) million 7 TeV collision events in CMS accumulated during the first 60 days is well under way. The consistency of the CMS computing model has been confirmed during these first weeks of data taking. This model is based on a hierarchy of use-cases deployed between the different tiers and, in particular, the distribution of RECO data to T1s, who then serve data on request to T2s, along a topology known as “fat tree”. Indeed, during this period this model was further extended by almost full “mesh” commissioning, meaning that RECO data were shipped to T2s whenever possible, enabling additional physics analyses compared with the “fat tree” model. Computing activities at the CMS Analysis Facility (CAF) have been marked by a good time response for a load almost evenly shared between ALCA (Alignment and Calibration tasks - highest p...

  9. COMPUTING

    CERN Multimedia

    I. Fisk

    2013-01-01

    Computing operation has been lower as the Run 1 samples are completing and smaller samples for upgrades and preparations are ramping up. Much of the computing activity is focusing on preparations for Run 2 and improvements in data access and flexibility of using resources. Operations Office Data processing was slow in the second half of 2013 with only the legacy re-reconstruction pass of 2011 data being processed at the sites.   Figure 1: MC production and processing was more in demand with a peak of over 750 Million GEN-SIM events in a single month.   Figure 2: The transfer system worked reliably and efficiently and transferred on average close to 520 TB per week with peaks at close to 1.2 PB.   Figure 3: The volume of data moved between CMS sites in the last six months   The tape utilisation was a focus for the operation teams with frequent deletion campaigns from deprecated 7 TeV MC GEN-SIM samples to INVALID datasets, which could be cleaned up...

  10. COMPUTING

    CERN Multimedia

    I. Fisk

    2012-01-01

      Introduction Computing activity has been running at a sustained, high rate as we collect data at high luminosity, process simulation, and begin to process the parked data. The system is functional, though a number of improvements are planned during LS1. Many of the changes will impact users, we hope only in positive ways. We are trying to improve the distributed analysis tools as well as the ability to access more data samples more transparently.  Operations Office Figure 2: Number of events per month, for 2012 Since the June CMS Week, Computing Operations teams successfully completed data re-reconstruction passes and finished the CMSSW_53X MC campaign with over three billion events available in AOD format. Recorded data was successfully processed in parallel, exceeding 1.2 billion raw physics events per month for the first time in October 2012 due to the increase in data-parking rate. In parallel, large efforts were dedicated to WMAgent development and integrati...

  11. COMPUTING

    CERN Multimedia

    M. Kasemann

    Introduction A large fraction of the effort was focused during the last period into the preparation and monitoring of the February tests of Common VO Computing Readiness Challenge 08. CCRC08 is being run by the WLCG collaboration in two phases, between the centres and all experiments. The February test is dedicated to functionality tests, while the May challenge will consist of running at all centres and with full workflows. For this first period, a number of functionality checks of the computing power, data repositories and archives as well as network links are planned. This will help assess the reliability of the systems under a variety of loads, and identifying possible bottlenecks. Many tests are scheduled together with other VOs, allowing the full scale stress test. The data rates (writing, accessing and transfer¬ring) are being checked under a variety of loads and operating conditions, as well as the reliability and transfer rates of the links between Tier-0 and Tier-1s. In addition, the capa...

  12. COMPUTING

    CERN Multimedia

    Contributions from I. Fisk

    2012-01-01

    Introduction The start of the 2012 run has been busy for Computing. We have reconstructed, archived, and served a larger sample of new data than in 2011, and we are in the process of producing an even larger new sample of simulations at 8 TeV. The running conditions and system performance are largely what was anticipated in the plan, thanks to the hard work and preparation of many people. Heavy ions Heavy Ions has been actively analysing data and preparing for conferences.  Operations Office Figure 6: Transfers from all sites in the last 90 days For ICHEP and the Upgrade efforts, we needed to produce and process record amounts of MC samples while supporting the very successful data-taking. This was a large burden, especially on the team members. Nevertheless the last three months were very successful and the total output was phenomenal, thanks to our dedicated site admins who keep the sites operational and the computing project members who spend countless hours nursing the...

  13. Victimisation and Relations of Symbolic Violence

    DEFF Research Database (Denmark)

    Pedersen, Bodil Maria

    Nay (1999). It also undertakes a critical discussion of symbolic violence in the meanings given to victimisation and its aftermaths, as when conceptualised with the help of PTSD (e.g. may the use of concepts of this kind and the practices developed in relation to it constitute symbolic violence...... the ways we understand and classify behavioural, emotional and cognitive processes, such as gendered practices, to social fields of practice, and points to the consequences of not doing so. In order to develop the analysis of concrete difficulties victims experience Bourdieu’s concept will be supplemented...... on the personal and social meanings of “trauma” developed in an empirical research project on the aftermaths of victimisation through rape and other forms of sexualised coercion....

  14. The influence of math anxiety on symbolic and non-symbolic magnitude processing.

    Science.gov (United States)

    Dietrich, Julia F; Huber, Stefan; Moeller, Korbinian; Klein, Elise

    2015-01-01

    Deficits in basic numerical abilities have been investigated repeatedly as potential risk factors of math anxiety. Previous research suggested that also a deficient approximate number system (ANS), which is discussed as being the foundation for later math abilities, underlies math anxiety. However, these studies examined this hypothesis by investigating ANS acuity using a symbolic number comparison task. Recent evidence questions the view that ANS acuity can be assessed using a symbolic number comparison task. To investigate whether there is an association between math anxiety and ANS acuity, we employed both a symbolic number comparison task and a non-symbolic dot comparison task, which is currently the standard task to assess ANS acuity. We replicated previous findings regarding the association between math anxiety and the symbolic distance effect for response times. High math anxious individuals showed a larger distance effect than less math anxious individuals. However, our results revealed no association between math anxiety and ANS acuity assessed using a non-symbolic dot comparison task. Thus, our results did not provide evidence for the hypothesis that a deficient ANS underlies math anxiety. Therefore, we propose that a deficient ANS does not constitute a risk factor for the development of math anxiety. Moreover, our results suggest that previous interpretations regarding the interaction of math anxiety and the symbolic distance effect have to be updated. We suggest that impaired number comparison processes in high math anxious individuals might account for the results rather than deficient ANS representations. Finally, impaired number comparison processes might constitute a risk factor for the development of math anxiety. Implications for current models regarding the origins of math anxiety are discussed.

  15. Symbolic Detection of Permutation and Parity Symmetries of Evolution Equations

    KAUST Repository

    Alghamdi, Moataz

    2017-06-18

    We introduce a symbolic computational approach to detecting all permutation and parity symmetries in any general evolution equation, and to generating associated invariant polynomials, from given monomials, under the action of these symmetries. Traditionally, discrete point symmetries of differential equations are systemically found by solving complicated nonlinear systems of partial differential equations; in the presence of Lie symmetries, the process can be simplified further. Here, we show how to find parity- and permutation-type discrete symmetries purely based on algebraic calculations. Furthermore, we show that such symmetries always form groups, thereby allowing for the generation of new group-invariant conserved quantities from known conserved quantities. This work also contains an implementation of the said results in Mathematica. In addition, it includes, as a motivation for this work, an investigation of the connection between variational symmetries, described by local Lie groups, and conserved quantities in Hamiltonian systems.

  16. Accelerators - instruments and symbols for power

    International Nuclear Information System (INIS)

    Vogt, E.

    1985-01-01

    I examine the cult of accelerator physics, describe the laws which govern its development, compare and contrast it with other similar cults in the past, and search for its driving force. It is a story of sheer power. Not only of grand projects whose scale dwarfs everything we have imagined, whose funds deplete federal treasuries and whose real estate transcends national boundaries, but also of the very symbols of human power, directly connected to the destiny of our race

  17. Scalable hardware verification with symbolic simulation

    CERN Document Server

    Bertacco, Valeria

    2006-01-01

    An innovative presentation of the theory of disjoint support decomposition, presenting novel results and algorithms, plus original and up-to-date techniques in formal verificationProvides an overview of current verification techniques, and unveils the inner workings of symbolic simulationFocuses on new techniques that narrow the performance gap between the complexity of digital systems and the limited ability to verify themAddresses key topics in need of future research.

  18. Blue Flag: a Symbol of Environmental Protection

    Directory of Open Access Journals (Sweden)

    Ioan Petroman

    2010-10-01

    Full Text Available Blue Flag is a high standard symbol of environmental protection and it is awarded to the beaches and agreement ports by the Foundation of Education for the Environment. The beaches having been awarded this distinction warrant particular protection for their visitors, which is a particular point of tourism attractiveness: the result, they are preferred by tourists and, therefore, by tour operators selling tourism packages for the littoral. In 2009, Romanian beaches were not awarded any Blue Flags.

  19. Accelerators - instruments and symbols for power

    Energy Technology Data Exchange (ETDEWEB)

    Vogt, E.

    1985-10-01

    I examine the cult of accelerator physics, describe the laws which govern its development, compare and contrast it with other similar cults in the past, and search for its driving force. It is a story of sheer power. Not only of grand projects whose scale dwarfs everything we have imagined, whose funds deplete federal treasuries and whose real estate transcends national boundaries, but also of the very symbols of human power, directly connected to the destiny of our race.

  20. A Bayesian classifier for symbol recognition

    OpenAIRE

    Barrat , Sabine; Tabbone , Salvatore; Nourrissier , Patrick

    2007-01-01

    URL : http://www.buyans.com/POL/UploadedFile/134_9977.pdf; International audience; We present in this paper an original adaptation of Bayesian networks to symbol recognition problem. More precisely, a descriptor combination method, which enables to improve significantly the recognition rate compared to the recognition rates obtained by each descriptor, is presented. In this perspective, we use a simple Bayesian classifier, called naive Bayes. In fact, probabilistic graphical models, more spec...

  1. DYNAMICS OF SYMBOLS AS TRANSCULTURAL POETICS

    Directory of Open Access Journals (Sweden)

    Adilson Vagner de Oliveira

    2015-04-01

    Full Text Available This paper aims at reflecting on the poetic possibilities of productions that take the encounter of cultures as compositional element to discuss issues beyond the limits of literature and culture. Thus, we sought to demonstrate the dynamics of cross-cultural symbolic systems through the political play A Revolta da Casa dos Ídolos (1978 by Pepetela in order to propose new understandings of the social reality in contemporary Angola.

  2. Five mechanisms of sound symbolic association.

    Science.gov (United States)

    Sidhu, David M; Pexman, Penny M

    2017-08-24

    Sound symbolism refers to an association between phonemes and stimuli containing particular perceptual and/or semantic elements (e.g., objects of a certain size or shape). Some of the best-known examples include the mil/mal effect (Sapir, Journal of Experimental Psychology, 12, 225-239, 1929) and the maluma/takete effect (Köhler, 1929). Interest in this topic has been on the rise within psychology, and studies have demonstrated that sound symbolic effects are relevant for many facets of cognition, including language, action, memory, and categorization. Sound symbolism also provides a mechanism by which words' forms can have nonarbitrary, iconic relationships with their meanings. Although various proposals have been put forth for how phonetic features (both acoustic and articulatory) come to be associated with stimuli, there is as yet no generally agreed-upon explanation. We review five proposals: statistical co-occurrence between phonetic features and associated stimuli in the environment, a shared property among phonetic features and stimuli; neural factors; species-general, evolved associations; and patterns extracted from language. We identify a number of outstanding questions that need to be addressed on this topic and suggest next steps for the field.

  3. COMPUTING

    CERN Multimedia

    I. Fisk

    2011-01-01

    Introduction The Computing Team successfully completed the storage, initial processing, and distribution for analysis of proton-proton data in 2011. There are still a variety of activities ongoing to support winter conference activities and preparations for 2012. Heavy ions The heavy-ion run for 2011 started in early November and has already demonstrated good machine performance and success of some of the more advanced workflows planned for 2011. Data collection will continue until early December. Facilities and Infrastructure Operations Operational and deployment support for WMAgent and WorkQueue+Request Manager components, routinely used in production by Data Operations, are provided. The GlideInWMS and components installation are now deployed at CERN, which is added to the GlideInWMS factory placed in the US. There has been new operational collaboration between the CERN team and the UCSD GlideIn factory operators, covering each others time zones by monitoring/debugging pilot jobs sent from the facto...

  4. Multiple symbol differential detection of uncoded and trellis coded MPSK

    Science.gov (United States)

    Divsalar, Dariush; Simon, Marvin K.; Shahshahani, Mehrdad

    1989-01-01

    A differential detection for MPSK, which uses a multiple symbol observation interval, is presented and its performance analyzed and simulated. The technique makes use of maximum-likelihood sequence estimation of the transmitted phases rather than symbol-by-symbol detection as in conventional differential detection. As such the performance of this multiple symbol detection scheme fills the gap between conventional (two-symbol observation) differentially coherent detection of MPSK and ideal coherent of MPSK with differential encoding. The amount of improvement gained over conventional differential detection depends on the number of phases, M, and the number of additional symbol intervals added to the observation. What is particularly interesting is that substantial performance improvement can be obtained for only one or two additional symbol intervals of observation. The analysis and simulation results presented are for uncoded and trellis coded MPSK.

  5. Computing with impure numbers - Automatic consistency checking and units conversion using computer algebra

    Science.gov (United States)

    Stoutemyer, D. R.

    1977-01-01

    The computer algebra language MACSYMA enables the programmer to include symbolic physical units in computer calculations, and features automatic detection of dimensionally-inhomogeneous formulas and conversion of inconsistent units in a dimensionally homogeneous formula. Some examples illustrate these features.

  6. COMPUTING

    CERN Multimedia

    M. Kasemann

    CMS relies on a well functioning, distributed computing infrastructure. The Site Availability Monitoring (SAM) and the Job Robot submission have been very instrumental for site commissioning in order to increase availability of more sites such that they are available to participate in CSA07 and are ready to be used for analysis. The commissioning process has been further developed, including "lessons learned" documentation via the CMS twiki. Recently the visualization, presentation and summarizing of SAM tests for sites has been redesigned, it is now developed by the central ARDA project of WLCG. Work to test the new gLite Workload Management System was performed; a 4 times increase in throughput with respect to LCG Resource Broker is observed. CMS has designed and launched a new-generation traffic load generator called "LoadTest" to commission and to keep exercised all data transfer routes in the CMS PhE-DEx topology. Since mid-February, a transfer volume of about 12 P...

  7. An Acoustic OFDM System with Symbol-by-Symbol Doppler Compensation for Underwater Communication

    Science.gov (United States)

    MinhHai, Tran; Rie, Saotome; Suzuki, Taisaku; Wada, Tomohisa

    2016-01-01

    We propose an acoustic OFDM system for underwater communication, specifically for vertical link communications such as between a robot in the sea bottom and a mother ship in the surface. The main contributions are (1) estimation of time varying Doppler shift using continual pilots in conjunction with monitoring the drift of Power Delay Profile and (2) symbol-by-symbol Doppler compensation in frequency domain by an ICI matrix representing nonuniform Doppler. In addition, we compare our proposal against a resampling method. Simulation and experimental results confirm that our system outperforms the resampling method when the velocity changes roughly over OFDM symbols. Overall, experimental results taken in Shizuoka, Japan, show our system using 16QAM, and 64QAM achieved a data throughput of 7.5 Kbit/sec with a transmitter moving at maximum 2 m/s, in a complicated trajectory, over 30 m vertically. PMID:27057558

  8. An Acoustic OFDM System with Symbol-by-Symbol Doppler Compensation for Underwater Communication

    Directory of Open Access Journals (Sweden)

    Tran MinhHai

    2016-01-01

    Full Text Available We propose an acoustic OFDM system for underwater communication, specifically for vertical link communications such as between a robot in the sea bottom and a mother ship in the surface. The main contributions are (1 estimation of time varying Doppler shift using continual pilots in conjunction with monitoring the drift of Power Delay Profile and (2 symbol-by-symbol Doppler compensation in frequency domain by an ICI matrix representing nonuniform Doppler. In addition, we compare our proposal against a resampling method. Simulation and experimental results confirm that our system outperforms the resampling method when the velocity changes roughly over OFDM symbols. Overall, experimental results taken in Shizuoka, Japan, show our system using 16QAM, and 64QAM achieved a data throughput of 7.5 Kbit/sec with a transmitter moving at maximum 2 m/s, in a complicated trajectory, over 30 m vertically.

  9. An Acoustic OFDM System with Symbol-by-Symbol Doppler Compensation for Underwater Communication.

    Science.gov (United States)

    MinhHai, Tran; Rie, Saotome; Suzuki, Taisaku; Wada, Tomohisa

    2016-01-01

    We propose an acoustic OFDM system for underwater communication, specifically for vertical link communications such as between a robot in the sea bottom and a mother ship in the surface. The main contributions are (1) estimation of time varying Doppler shift using continual pilots in conjunction with monitoring the drift of Power Delay Profile and (2) symbol-by-symbol Doppler compensation in frequency domain by an ICI matrix representing nonuniform Doppler. In addition, we compare our proposal against a resampling method. Simulation and experimental results confirm that our system outperforms the resampling method when the velocity changes roughly over OFDM symbols. Overall, experimental results taken in Shizuoka, Japan, show our system using 16QAM, and 64QAM achieved a data throughput of 7.5 Kbit/sec with a transmitter moving at maximum 2 m/s, in a complicated trajectory, over 30 m vertically.

  10. CHRISTIAN SYMBOLISM IN FYODOR DOSTOEVSKY'S NOVEL "THE POSSESSED" ("DEMONS"

    Directory of Open Access Journals (Sweden)

    Sergei Leonidovich Sharakov

    2013-11-01

    Full Text Available The article raises a question of Christian symbolism in Fyodor Dostoevsky’s novel The Possessed (Demons. The introductory part identifies the purpose of a symbol in Christian poetics through the parallel with ancient symbolism. The author makes a conclusion that the functional role of a symbol in the ancient world and Christian tradition is different. Therefore, the ancient symbol involves a number of interrelated categories, such as fate, intuition or conjecture, inspiration, and predictions. Christian symbolism is based on the idea of redemption and moral innocence. Methodologically, the article is based on a cultural and historical approach, as well as on the comparative academic tradition. The overview of Dostoyevsky’s pre-materials for The Possessed (Demons enables us to suggest the use of Christian symbolism in this novel. Hence, the objective of the study is to investigate a composition of images and symbols in this piece of writing, with a special focus on the image of a chronicler since the storyline of the novel is developed through his perception. We make a supposition that there are several levels of Gospel perception in the artistic vision or consciousness of the chronicler, that form the basis of the symbolical composition of the novel. The article sequentially examines the examples of Christian symbolism, including the connection of ideas, characters and storylines of the novel with the Gospel. Then it gives evidence and reasons for the thesis that the Gospel gives the characters of the novel the grounds for shaping their destiny.

  11. Symbolic Solution Approach to Wind Turbine based on Doubly Fed Induction Generator Model

    DEFF Research Database (Denmark)

    Cañas–Carretón, M.; Gómez–Lázaro, E.; Martín–Martínez, S.

    2015-01-01

    This paper describes an alternative approach based on symbolic computations to simulate wind turbines equipped with Doubly–Fed Induction Generator (DFIG). The actuator disk theory is used to represent the aerodynamic part, and the one-mass model simulates the mechanical part. The 5th–order induct......This paper describes an alternative approach based on symbolic computations to simulate wind turbines equipped with Doubly–Fed Induction Generator (DFIG). The actuator disk theory is used to represent the aerodynamic part, and the one-mass model simulates the mechanical part. The 5th......–order induction generator is selected to model the electric machine, being this approach suitable to estimate the DFIG performance under transient conditions. The corresponding non–linear integro-differential equation system has been reduced to a linear state-space system by using an ad-hoc local linearization...

  12. Heart Rate Fragmentation: A Symbolic Dynamical Approach

    Directory of Open Access Journals (Sweden)

    Madalena D. Costa

    2017-11-01

    Full Text Available Background: We recently introduced the concept of heart rate fragmentation along with a set of metrics for its quantification. The term was coined to refer to an increase in the percentage of changes in heart rate acceleration sign, a dynamical marker of a type of anomalous variability. The effort was motivated by the observation that fragmentation, which is consistent with the breakdown of the neuroautonomic-electrophysiologic control system of the sino-atrial node, could confound traditional short-term analysis of heart rate variability.Objective: The objectives of this study were to: (1 introduce a symbolic dynamical approach to the problem of quantifying heart rate fragmentation; (2 evaluate how the distribution of the different dynamical patterns (“words” varied with the participants' age in a group of healthy subjects and patients with coronary artery disease (CAD; and (3 quantify the differences in the fragmentation patterns between the two sample populations.Methods: The symbolic dynamical method employed here was based on a ternary map of the increment NN interval time series and on the analysis of the relative frequency of symbolic sequences (words with a pre-defined set of features. We analyzed annotated, open-access Holter databases of healthy subjects and patients with CAD, provided by the University of Rochester Telemetric and Holter ECG Warehouse (THEW.Results: The degree of fragmentation was significantly higher in older individuals than in their younger counterparts. However, the fragmentation patterns were different in the two sample populations. In healthy subjects, older age was significantly associated with a higher percentage of transitions from acceleration/deceleration to zero acceleration and vice versa (termed “soft” inflection points. In patients with CAD, older age was also significantly associated with higher percentages of frank reversals in heart rate acceleration (transitions from acceleration to

  13. On the Symbolism of Thomas Mann

    Directory of Open Access Journals (Sweden)

    Vasily M. Tolmatchoff

    2017-09-01

    Full Text Available The essay discusses Thomas Mann’s symbolism and its parameters as well as Mann’s interpretation of the crisis of European spiritual values. Тhe author examines the role of Nietzsche in Mann’s heritage as well as interconnections between Mann and Wilde, Mann and Gide. Buddenbrooks is interpreted as a novel about the end of the German Renaissance; duality of the modern artist is shown on the example of “Tonio Kröger” while the paradoxes of his eroticism are analyzed on the example of “Der Tod in Venedig.”

  14. Information measures and uncertainty of particular symbols

    Czech Academy of Sciences Publication Activity Database

    Mareš, Milan

    2011-01-01

    Roč. 47, č. 1 (2011), s. 144-163 ISSN 0023-5954 R&D Projects: GA MŠk(CZ) 1M0572; GA ČR GA402/08/0618 Institutional research plan: CEZ:AV0Z10750506 Keywords : Information source * Information measure * Uncertainty modelling Subject RIV: BB - Applied Statistics, Operational Research Impact factor: 0.454, year: 2011 http://library.utia.cas.cz/separaty/2011/E/mares-information measure s and uncertainty of particular symbols.pdf

  15. [Symbolic meanings of patients with chronic diseases].

    Science.gov (United States)

    Muñoz, Luz Angélica; Price, Yocelyn; Gambini, Liliana; Stefanelli, Maguida Costa

    2003-12-01

    The investigation presents three cultural universes of those suffering from arterial hypertension, diabetes and arthrosis, describing the different dimensions and interpreting their meaning. The ethnographic method was utilized, using the ethnographic interview and participant observation and for the interpretation, the symbolic interactionism and other authors. Convergences in the dimensions arise in which the three diseases are perceived: the loss of well-being and social support, fear of disability and death. perception of the family and accepting the chronicity, interest in alternative medicine. The informants of this study perceive nursing care with ambiguity.

  16. Symbolic forms can be mnemonics for recall.

    Science.gov (United States)

    Liu, C H; Kennedy, J M

    1994-12-01

    Form symbolism using squares and circles can aid recall. In Experiment 1, subjects saw 20 words, each presented in a circle or a square. Words like SOFT and MOTHER were presented in circles in the "congruent" condition, whereas the same words were presented in squares in the "incongruent" condition. Two experiments revealed that words in the congruent condition were more likely to be recalled. A comparison of the conditions with a baseline condition, in which 20 listed words were not closely related to either of the shapes, suggests that the effect was more likely due to facilitation produced by the congruent condition than to inhibition from the incongruent condition.

  17. MIMESIS OR THE FRUITION OF SYMBOLIC

    Directory of Open Access Journals (Sweden)

    Olivier Feron

    2012-06-01

    Full Text Available The problem of mimesis seems to be coextensive to history of philosophy, and its re-visitation – from the perspective of a critical anthropology – should lead to the deconstruction of certain myths that structure metaphysics since Plato; among others, the stigma of the reproduction of a legitimate origin. Considering the work of Hans Blumenberg, this paper considers the possibility of an anthropology developed from the perspective of a symbolical dynamics that, from organic to imaginary, from unconscious to analytics of intellect, allows modern reason to understand its own exercise as a play, beyond any kind of anguish.

  18. The dilemma of the symbols: analogies between philosophy, biology and artificial life.

    Science.gov (United States)

    Spadaro, Salvatore

    2013-01-01

    This article analyzes some analogies going from Artificial Life questions about the symbol-matter connection to Artificial Intelligence questions about symbol-grounding. It focuses on the notion of the interpretability of syntax and how the symbols are integrated in a unity ("binding problem"). Utilizing the DNA code as a model, this paper discusses how syntactic features could be defined as high-grade characteristics of the non syntactic relations in a material-dynamic structure, by using an emergentist approach. This topic furnishes the ground for a confutation of J. Searle's statement that syntax is observer-relative, as he wrote in his book "Mind: A Brief Introduction". Moreover the evolving discussion also modifies the classic symbol-processing doctrine in the mind which Searle attacks as a strong AL argument, that life could be implemented in a computational mode. Lastly, this paper furnishes a new way of support for the autonomous systems thesis in Artificial Life and Artificial Intelligence, using, inter alia, the "adaptive resonance theory" (ART).

  19. Classification of follicular lymphoma images: a holistic approach with symbol-based machine learning methods.

    Science.gov (United States)

    Zorman, Milan; Sánchez de la Rosa, José Luis; Dinevski, Dejan

    2011-12-01

    It is not very often to see a symbol-based machine learning approach to be used for the purpose of image classification and recognition. In this paper we will present such an approach, which we first used on the follicular lymphoma images. Lymphoma is a broad term encompassing a variety of cancers of the lymphatic system. Lymphoma is differentiated by the type of cell that multiplies and how the cancer presents itself. It is very important to get an exact diagnosis regarding lymphoma and to determine the treatments that will be most effective for the patient's condition. Our work was focused on the identification of lymphomas by finding follicles in microscopy images provided by the Laboratory of Pathology in the University Hospital of Tenerife, Spain. We divided our work in two stages: in the first stage we did image pre-processing and feature extraction, and in the second stage we used different symbolic machine learning approaches for pixel classification. Symbolic machine learning approaches are often neglected when looking for image analysis tools. They are not only known for a very appropriate knowledge representation, but also claimed to lack computational power. The results we got are very promising and show that symbolic approaches can be successful in image analysis applications.

  20. Usefulness of Forensic Dental Symbols© and Dental Encoder© database in forensic odontology.

    Science.gov (United States)

    Martínez-Chicón, Jesús; Valenzuela, Aurora

    2012-01-01

    A new universal graphic dental system, Forensic Dental Symbols(©), has been created to provide precision in the construction of dental records, improve standardization, and increase efficiency in dental identification procedures. Two hundred and thirty-four different graphic symbols representing the most frequent clinical status for each tooth were designed. Symbols can be then converted to a typographic font and then are ready to use in any computer. For the appropriate use, manipulation, and storage of dental information generated by the Forensic Dental Symbols(©), Dental Encoder(©) database has been created. The database contains all the information required by INTERPOL Disaster Victim Identification (DVI)-dental-forms. To explore the possibilities that Dental Encoder(©) offers, an antemortem dental database from a Spanish population of 3920 military personnel had been constructed. Data generated by Dental Encoder(©) were classified into sex and age groups. The program can perform an automatic search of the database for cases that match a selected clinical status presented in a single tooth or a combination of situations for several teeth. Moreover, Dental Encoder(©) allows information to be printed on INTERPOL DVI-dental-forms, or the inclusion of any completed form into any document, technical report, or identification of dental report. © 2011 American Academy of Forensic Sciences.

  1. Symbol interval optimization for molecular communication with drift.

    Science.gov (United States)

    Kim, Na-Rae; Eckford, Andrew W; Chae, Chan-Byoung

    2014-09-01

    In this paper, we propose a symbol interval optimization algorithm in molecular communication with drift. Proper symbol intervals are important in practical communication systems since information needs to be sent as fast as possible with low error rates. There is a trade-off, however, between symbol intervals and inter-symbol interference (ISI) from Brownian motion. Thus, we find proper symbol interval values considering the ISI inside two kinds of blood vessels, and also suggest no ISI system for strong drift models. Finally, an isomer-based molecule shift keying (IMoSK) is applied to calculate achievable data transmission rates (achievable rates, hereafter). Normalized achievable rates are also obtained and compared in one-symbol ISI and no ISI systems.

  2. Symbolic Estrangement: Evidence against a Strong Association between Numerical Symbols and the Quantities They Represent

    Science.gov (United States)

    Lyons, Ian M.; Ansari, Daniel; Beilock, Sian L.

    2012-01-01

    Are numerals estranged from a sense of the actual quantities they represent? We demonstrate that, irrespective of numerical size or distance, direct comparison of the relative quantities represented by symbolic and nonsymbolic formats leads to performance markedly worse than when comparing 2 nonsymbolic quantities (Experiment 1). Experiment 2…

  3. Development of the Symbolic Manipulator Laboratory modeling package for the kinematic design and optimization of the Future Armor Rearm System robot. Ammunition Logistics Program

    Energy Technology Data Exchange (ETDEWEB)

    March-Leuba, S.; Jansen, J.F.; Kress, R.L.; Babcock, S.M. [Oak Ridge National Lab., TN (United States); Dubey, R.V. [Tennessee Univ., Knoxville, TN (United States). Dept. of Mechanical and Aerospace Engineering

    1992-08-01

    A new program package, Symbolic Manipulator Laboratory (SML), for the automatic generation of both kinematic and static manipulator models in symbolic form is presented. Critical design parameters may be identified and optimized using symbolic models as shown in the sample application presented for the Future Armor Rearm System (FARS) arm. The computer-aided development of the symbolic models yields equations with reduced numerical complexity. Important considerations have been placed on the closed form solutions simplification and on the user friendly operation. The main emphasis of this research is the development of a methodology which is implemented in a computer program capable of generating symbolic kinematic and static forces models of manipulators. The fact that the models are obtained trigonometrically reduced is among the most significant results of this work and the most difficult to implement. Mathematica, a commercial program that allows symbolic manipulation, is used to implement the program package. SML is written such that the user can change any of the subroutines or create new ones easily. To assist the user, an on-line help has been written to make of SML a user friendly package. Some sample applications are presented. The design and optimization of the 5-degrees-of-freedom (DOF) FARS manipulator using SML is discussed. Finally, the kinematic and static models of two different 7-DOF manipulators are calculated symbolically.

  4. Development of the Symbolic Manipulator Laboratory modeling package for the kinematic design and optimization of the Future Armor Rearm System robot

    Energy Technology Data Exchange (ETDEWEB)

    March-Leuba, S.; Jansen, J.F.; Kress, R.L.; Babcock, S.M. (Oak Ridge National Lab., TN (United States)); Dubey, R.V. (Tennessee Univ., Knoxville, TN (United States). Dept. of Mechanical and Aerospace Engineering)

    1992-08-01

    A new program package, Symbolic Manipulator Laboratory (SML), for the automatic generation of both kinematic and static manipulator models in symbolic form is presented. Critical design parameters may be identified and optimized using symbolic models as shown in the sample application presented for the Future Armor Rearm System (FARS) arm. The computer-aided development of the symbolic models yields equations with reduced numerical complexity. Important considerations have been placed on the closed form solutions simplification and on the user friendly operation. The main emphasis of this research is the development of a methodology which is implemented in a computer program capable of generating symbolic kinematic and static forces models of manipulators. The fact that the models are obtained trigonometrically reduced is among the most significant results of this work and the most difficult to implement. Mathematica, a commercial program that allows symbolic manipulation, is used to implement the program package. SML is written such that the user can change any of the subroutines or create new ones easily. To assist the user, an on-line help has been written to make of SML a user friendly package. Some sample applications are presented. The design and optimization of the 5-degrees-of-freedom (DOF) FARS manipulator using SML is discussed. Finally, the kinematic and static models of two different 7-DOF manipulators are calculated symbolically.

  5. Computer methods in general relativity: algebraic computing

    CERN Document Server

    Araujo, M E; Skea, J E F; Koutras, A; Krasinski, A; Hobill, D; McLenaghan, R G; Christensen, S M

    1993-01-01

    Karlhede & MacCallum [1] gave a procedure for determining the Lie algebra of the isometry group of an arbitrary pseudo-Riemannian manifold, which they intended to im- plement using the symbolic manipulation package SHEEP but never did. We have recently finished making this procedure explicit by giving an algorithm suitable for implemen- tation on a computer [2]. Specifically, we have written an algorithm for determining the isometry group of a spacetime (in four dimensions), and partially implemented this algorithm using the symbolic manipulation package CLASSI, which is an extension of SHEEP.

  6. Low-complexity linewidth-tolerant time domain sub-symbol optical phase noise suppression in CO-OFDM systems.

    Science.gov (United States)

    Hong, Xuezhi; Hong, Xiaojian; Zhang, Junwei; He, Sailing

    2016-03-07

    Two linewidth-tolerant optical phase noise suppression algorithms, non-decision aided sub-symbol optical phase noise suppression (NDA-SPS) and partial-decision aided sub-symbol optical phase noise suppression (PDA-SPS), based on low-complexity time domain sub-symbol processing are proposed for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. High accuracy carrier phase estimation is achieved in the NDA-SPS algorithm without decision error propagation. Compared with NDA-SPS, partial-decision aided estimation is introduced in PDA-SPS to reduce the pilot-overhead by half, yet only a small performance degradation is induced. The principles and computational complexities of the proposed algorithms are theoretically analyzed. By adopting specially designed comb-type pilot subcarriers, multiplier-free observation-based matrix generation is realized in the proposed algorithms. Computationally intensive discrete Fourier transform (DFT) or inverse DFT (IDFT) operations, which are usually carried out in other high-performance inter-carrier-interference (ICI) mitigation algorithms multiple times, are completely avoided. Compared with several other sub-symbol algorithms, the proposed algorithms with lower complexities offer considerably larger laser linewidth tolerances as demonstrated by Monte-Carlo simulations. Numerical analysis verifies that the optimal performance of PDA-SPS can be achieved with moderate numbers of sub-symbols.

  7. The name of the son. Fatherhood, motherhood and symbolic competencies

    Directory of Open Access Journals (Sweden)

    María Martina Casullo

    2015-09-01

    Full Text Available Tania Zittoun conceptions on uses of cultural elements as symbolic resources for psychological development are presented. Such uses of symbolic resources are examined through a study of the procedure of choosing first names during the transition to parenthood. The notion of symbolic competencies, as the abilities to use cultural elements as resources for thinking, action and a healthy development, is discussed. 

  8. Multiple-Symbol, Partially Coherent Detection of MPSK

    Science.gov (United States)

    Simon, Marvin K.; Divsalar, Dariush

    1994-01-01

    Proposed method of reception of multiple-phase-shift-keyed (MPSK) radio signals involves multiple-symbol, partially coherent detection. Instead of attempting to determine phase of transmitted signal during each symbol period as in coherent detection, receiver acquires signal data during multiple-symbol observation interval, then produces maximum-likelihood-sequence estimate of phases transmitted during interval. Combination of coherent-reception and incoherent-reception decision rules are used.

  9. Inter-Symbol Guard Time for Synchronizing Optical PPM

    Science.gov (United States)

    Far, William; Gin, Jonathan; Srinivasan, Meera; Quirk, Kevin

    2009-01-01

    An inter-symbol guard time has been proposed as a means of synchronizing the symbol and slot clocks of an optical pulse-position modulation (PPM) receiver with the symbol and slot periods of an incoming optical PPM signal.The proposal is applicable to the low-flux case in which the receiver photodetector operates in a photon-counting mode and the count can include contributions from incidental light sources and dark current.

  10. From mythology to psychology: Identifying archetypal symbols in movies

    OpenAIRE

    Díaz Boladeras, Marta; Català Mallofré, Andreu; Chen, Wei; Rauterberg, Mattias; Ivonin, Leonid; Huang-Ming, Chang

    2013-01-01

    In this article, we introduce the theory of archetype, which explains the connection between ancient myths and the human mind. Based on the assumption that archetypes are in the deepest level of human mind, we propose that archetypal symbolism is a kind of knowledge that supports the cognitive process for creating subjective world-view towards the physical world we live in. According to archetypal symbolism, we conducted an empirical study to identify archetypal symbols in modern movies. A ne...

  11. The primal scene and symbol formation.

    Science.gov (United States)

    Niedecken, Dietmut

    2016-06-01

    This article discusses the meaning of the primal scene for symbol formation by exploring its way of processing in a child's play. The author questions the notion that a sadomasochistic way of processing is the only possible one. A model of an alternative mode of processing is being presented. It is suggested that both ways of processing intertwine in the "fabric of life" (D. Laub). Two clinical vignettes, one from an analytic child psychotherapy and the other from the analysis of a 30 year-old female patient, illustrate how the primal scene is being played out in the form of a terzet. The author explores whether the sadomasochistic way of processing actually precedes the "primal scene as a terzet". She discusses if it could even be regarded as a precondition for the formation of the latter or, alternatively, if the "combined parent-figure" gives rise to ways of processing. The question is being left open. Finally, it is shown how both modes of experiencing the primal scene underlie the discoursive and presentative symbol formation, respectively. Copyright © 2015 Institute of Psychoanalysis.

  12. Sound Symbolism in the Languages of Australia

    Science.gov (United States)

    Haynie, Hannah; Bowern, Claire; LaPalombara, Hannah

    2014-01-01

    The notion that linguistic forms and meanings are related only by convention and not by any direct relationship between sounds and semantic concepts is a foundational principle of modern linguistics. Though the principle generally holds across the lexicon, systematic exceptions have been identified. These “sound symbolic” forms have been identified in lexical items and linguistic processes in many individual languages. This paper examines sound symbolism in the languages of Australia. We conduct a statistical investigation of the evidence for several common patterns of sound symbolism, using data from a sample of 120 languages. The patterns examined here include the association of meanings denoting “smallness” or “nearness” with front vowels or palatal consonants, and the association of meanings denoting “largeness” or “distance” with back vowels or velar consonants. Our results provide evidence for the expected associations of vowels and consonants with meanings of “smallness” and “proximity” in Australian languages. However, the patterns uncovered in this region are more complicated than predicted. Several sound-meaning relationships are only significant for segments in prominent positions in the word, and the prevailing mapping between vowel quality and magnitude meaning cannot be characterized by a simple link between gradients of magnitude and vowel F2, contrary to the claims of previous studies. PMID:24752356

  13. Symbolic interactionism and the concept of power.

    Science.gov (United States)

    Dennis, Alex; Martin, Peter J

    2005-06-01

    Symbolic interactionism is often represented as a perspective which is limited by its restriction to 'micro' aspects of social organization. As such, it is allegedly unable to adequately conceptualize 'macro' phenomena such as social structure, patterns of inequality, and power. Such a view is routinely presented in undergraduate textbooks. This paper contests such a view through a consideration of the concept of power. We argue that the interactionist research tradition does show a fundamental concern with power phenomena, and that a reconsideration of the concept is timely in light of theoretical developments in sociology more generally. An increasing concern with the analysis of culture, the continuing influence of Foucault, the development of feminist perspectives, and the emerging consensus around neo-Weberian thought have all contributed to a renewal of interest in themes long ago explored by interactionists. As examples we suggest that interactionist studies in the fields of deviance and education have been concerned above all with the authoritative imposition of consequential identities, i.e., with the social processes through which power is enacted and institutionalized in real situations. Such developments have led some to argue that interactionism has now been incorporated into the mainstream of sociology. We conclude, however, by arguing that such a view runs the risk of granting to orthodox sociological thought a legitimacy which is analytically unwarranted, and which fails to recognize the alternative theoretical and philosophical foundations of symbolic interactionist thought.

  14. Challenging convention: symbolic interactionism and grounded theory.

    Science.gov (United States)

    Newman, Barbara

    2008-01-01

    Not very much is written in the literature about decisions made by researchers and the justifications on method as a result of a particular clinical problem, together with an appropriate and congruent theoretical perspective, particularly for Glaserian grounded theory. I contend the utilisation of symbolic interactionism as a theoretical perspective to inform and guide the evolving research process and analysis of data when using classic or Glaserian grounded theory (GT) method, is not always appropriate. Within this article I offer an analysis of the key issues to be addressed when contemplating the use of Glaserian GT and the utilisation of an appropriate theoretical perspective, rather than accepting convention of symbolic interactionism (SI). The analysis became imperative in a study I conducted that sought to explore the concerns, adaptive behaviours, psychosocial processes and relevant interactions over a 12-month period, among newly diagnosed persons with end stage renal disease, dependent on haemodialysis in the home environment for survival. The reality of perception was central to the end product in the study. Human ethics approval was granted by six committees within New South Wales Health Department and one from a university.

  15. Symbolic convergence and the hydrogen economy

    International Nuclear Information System (INIS)

    Sovacool, Benjamin K.; Brossmann, Brent

    2010-01-01

    This article documents that the hydrogen economy continues to attract significant attention among politicians, the media, and some academics. We believe that an explanation lies in the way that the hydrogen economy fulfills psychological and cultural needs related to a future world where energy is abundant, cheap, and pollution-free, a 'fantasy' that manifests itself with the idea that society can continue to operate without limits imposed by population growth and the destruction of the environment. The article begins by explaining its research methodology consisting of two literature reviews, research interviews of energy experts, and the application of symbolic convergence theory, a general communications theory about the construction of rhetorical fantasies. We then identify a host of socio-technical challenges to explain why the creation of a hydrogen economy would present immense (and possibly intractable) obstacles, an argument supplemented by our research interviews. Next, we employ symbolic convergence theory to identify five prevalent fantasy themes and rhetorical visions-independence, patriotism, progress, democratization, and inevitability-in academic and public discussions in favor of the hydrogen economy. We conclude by offering implications for scholarship relating to energy policy more broadly.

  16. The number and its symbolism in ancient Greece

    Directory of Open Access Journals (Sweden)

    Doc. dr Milena Bogdanović

    2013-07-01

    Full Text Available The symbols are of particular importance. They are the heart of the creative life; rather they are its core. They reveal the secrets of the unconscious mind open to the unknown and the infinite. While talking or gestures while express, we use the symbols, noting it or not. All spiritual science, all art and all art techniques encounter on their way symbols. History confirms that the symbols of each object can be obtained symbolic value, whether natural (rocks, trees, animals, planets, fire, lightning, etc... or abstract (geometrical shape, number, pace, ideas, etc.... The use of numbers as symbols is as old as language itself, but one that precedes writing, which symbolize numbers (that is, where the reality behind the external characters. The sheer numbers and their symbolism in ancient Greece and is closely associated with the philosophy and mathematics (namely arithmetic. They summarize their view of the world and everything around them. This paper draws attention to the symbolism of the numbers that were in ancient Greece.

  17. Handwriting generates variable visual input to facilitate symbol learning

    Science.gov (United States)

    Li, Julia X.; James, Karin H.

    2015-01-01

    Recent research has demonstrated that handwriting practice facilitates letter categorization in young children. The present experiments investigated why handwriting practice facilitates visual categorization by comparing two hypotheses: That handwriting exerts its facilitative effect because of the visual-motor production of forms, resulting in a direct link between motor and perceptual systems, or because handwriting produces variable visual instances of a named category in the environment that then changes neural systems. We addressed these issues by measuring performance of 5 year-old children on a categorization task involving novel, Greek symbols across 6 different types of learning conditions: three involving visual-motor practice (copying typed symbols independently, tracing typed symbols, tracing handwritten symbols) and three involving visual-auditory practice (seeing and saying typed symbols of a single typed font, of variable typed fonts, and of handwritten examples). We could therefore compare visual-motor production with visual perception both of variable and similar forms. Comparisons across the six conditions (N=72) demonstrated that all conditions that involved studying highly variable instances of a symbol facilitated symbol categorization relative to conditions where similar instances of a symbol were learned, regardless of visual-motor production. Therefore, learning perceptually variable instances of a category enhanced performance, suggesting that handwriting facilitates symbol understanding by virtue of its environmental output: supporting the notion of developmental change though brain-body-environment interactions. PMID:26726913

  18. Handwriting generates variable visual output to facilitate symbol learning.

    Science.gov (United States)

    Li, Julia X; James, Karin H

    2016-03-01

    Recent research has demonstrated that handwriting practice facilitates letter categorization in young children. The present experiments investigated why handwriting practice facilitates visual categorization by comparing 2 hypotheses: that handwriting exerts its facilitative effect because of the visual-motor production of forms, resulting in a direct link between motor and perceptual systems, or because handwriting produces variable visual instances of a named category in the environment that then changes neural systems. We addressed these issues by measuring performance of 5-year-old children on a categorization task involving novel, Greek symbols across 6 different types of learning conditions: 3 involving visual-motor practice (copying typed symbols independently, tracing typed symbols, tracing handwritten symbols) and 3 involving visual-auditory practice (seeing and saying typed symbols of a single typed font, of variable typed fonts, and of handwritten examples). We could therefore compare visual-motor production with visual perception both of variable and similar forms. Comparisons across the 6 conditions (N = 72) demonstrated that all conditions that involved studying highly variable instances of a symbol facilitated symbol categorization relative to conditions where similar instances of a symbol were learned, regardless of visual-motor production. Therefore, learning perceptually variable instances of a category enhanced performance, suggesting that handwriting facilitates symbol understanding by virtue of its environmental output: supporting the notion of developmental change though brain-body-environment interactions. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  19. Exploring the Development of Symbolic Function of Consciousness: A Technique

    Directory of Open Access Journals (Sweden)

    Polyakov A.M.,

    2016-07-01

    Full Text Available This article describes studying method which developed the symbolic function mind. It is defined as a functional unit providing the solution of problems by understanding and expression of the reality of the subject-subject relationship using symbols. The symbol understood as a cultural form of presen- tation of subjective reality, mediating the relationship and interaction between two or more subjects. The symbol consists of sense-perception of form and meaning, expressing a subjective reality. The structure of the symbolic function includes the following components: generation and implementation plan, the transformation of symbolic forms, the awareness of the antinomic character, character interpretation. Investigation techiques was developed in accordance with the principles of construction of experimental-genetic method. Empirical criteria for evaluating the level of its development was based on the structure of the symbolic function, and developed a system of assistance for the realization of symbolic meaning. The method allows determine the dynamics and conditions for the development of the symbolic function, its genetic makeup, as well as the form and content of cooperation with con- temporaries.

  20. The effects of user factors and symbol referents on public symbol design using the stereotype production method.

    Science.gov (United States)

    Ng, Annie W Y; Siu, Kin Wai Michael; Chan, Chetwyn C H

    2012-01-01

    This study investigated the influence of user factors and symbol referents on public symbol design among older people, using the stereotype production method for collecting user ideas during the symbol design process. Thirty-one older adults were asked to draw images based on 28 public symbol referents and to indicate their familiarity with and ease with which they visualised each referent. Differences were found between the pictorial solutions generated by males and females. However, symbol design was not influenced by participants' education level, vividness of visual imagery, object imagery preference or spatial imagery preference. Both familiar and unfamiliar referents were illustrated pictorially without much difficulty by users. The more visual the referent, the less difficulty the users had in illustrating it. The findings of this study should aid the optimisation of the stereotype production method for user-involved symbol design. Copyright © 2011 Elsevier Ltd and The Ergonomics Society. All rights reserved.

  1. Universal symbolic expression for radial distance of conic motion

    Directory of Open Access Journals (Sweden)

    Sharaf M.A.

    2014-01-01

    Full Text Available In the present paper, a universal symbolic expression for radial distance of conic motion in recursive power series form is developed. The importance of this analytical power series representation is that it is invariant under many operations because the result of addition, multiplication, exponentiation, integration, differentiation, etc. of a power series is also a power series. This is the fact that provides excellent flexibility in dealing with analytical, as well as computational developments of problems related to radial distance. For computational developments, a full recursive algorithm is developed for the series coefficients. An efficient method using the continued fraction theory is provided for series evolution, and two devices are proposed to secure the convergence when the time interval (t − t0 is large. In addition, the algorithm does not need the solution of Kepler’s equation and its variants for parabolic and hyperbolic orbits. Numerical applications of the algorithm are given for three orbits of different eccentricities; the results showed that it is accurate for any conic motion.

  2. Performance of the split-symbol moments SNR estimator in the presence of inter-symbol interference

    Science.gov (United States)

    Shah, B.; Hinedi, S.

    1989-01-01

    The Split-Symbol Moments Estimator (SSME) is an algorithm that is designed to estimate symbol signal-to-noise ratio (SNR) in the presence of additive white Gaussian noise (AWGN). The performance of the SSME algorithm in band-limited channels is examined. The effects of the resulting inter-symbol interference (ISI) are quantified. All results obtained are in closed form and can be easily evaluated numerically for performance prediction purposes. Furthermore, they are validated through digital simulations.

  3. Science learning and graphic symbols : an exploration of early years teachers’ views and use of graphic symbols when teaching science

    OpenAIRE

    Kambouri, Maria; Allen, Michael; Pampoulou, Eliada; Pieridou, Myria

    2016-01-01

    The study investigated early years teachers’ understanding and use of graphic symbols, defined as the visual representation(s) used to communicate one or more “linguistic” concepts, which can be used to facilitate science learning. The study was conducted in Cyprus where six early years teachers were observed and interviewed. The results indicate that the teachers had a good understanding of the role of symbols, but demonstrated a lack of understanding in regards to graphic symbols specifical...

  4. Using LDPC Code Constraints to Aid Recovery of Symbol Timing

    Science.gov (United States)

    Jones, Christopher; Villasnor, John; Lee, Dong-U; Vales, Esteban

    2008-01-01

    A method of utilizing information available in the constraints imposed by a low-density parity-check (LDPC) code has been proposed as a means of aiding the recovery of symbol timing in the reception of a binary-phase-shift-keying (BPSK) signal representing such a code in the presence of noise, timing error, and/or Doppler shift between the transmitter and the receiver. This method and the receiver architecture in which it would be implemented belong to a class of timing-recovery methods and corresponding receiver architectures characterized as pilotless in that they do not require transmission and reception of pilot signals. Acquisition and tracking of a signal of the type described above have traditionally been performed upstream of, and independently of, decoding and have typically involved utilization of a phase-locked loop (PLL). However, the LDPC decoding process, which is iterative, provides information that can be fed back to the timing-recovery receiver circuits to improve performance significantly over that attainable in the absence of such feedback. Prior methods of coupling LDPC decoding with timing recovery had focused on the use of output code words produced as the iterations progress. In contrast, in the present method, one exploits the information available from the metrics computed for the constraint nodes of an LDPC code during the decoding process. In addition, the method involves the use of a waveform model that captures, better than do the waveform models of the prior methods, distortions introduced by receiver timing errors and transmitter/ receiver motions. An LDPC code is commonly represented by use of a bipartite graph containing two sets of nodes. In the graph corresponding to an (n,k) code, the n variable nodes correspond to the code word symbols and the n-k constraint nodes represent the constraints that the code places on the variable nodes in order for them to form a valid code word. The decoding procedure involves iterative computation

  5. Scene understanding and objects detection and identification with a perceptual system based on the network-symbolic models for industrial robots

    Science.gov (United States)

    Kuvich, Gary

    2005-11-01

    One of the major problems of modern industrial robots is a lack of reliable perceptual systems that are similar to human vision in its abilities to understand visual scene and detect and unambiguously identify objects. The traditional linear bottom-up "segmentation-grouping-learning-recognition" approach to image processing and analysis cannot provide a reliable separation of an object from its background or clutter, while human vision unambiguously solves this problem. The modern computer vision can only recognize certain features from visual information, and it plays an auxiliary role, helping to build or choose appropriate 3-dimensional models of objects and visual scene. As result, designers of robotics systems must create for industrial robots artificial environments, which allowing for precise computations of 3-dimensional models within such environments. However, outside of such an artificial environment, the robot is dysfunctional. Biologically-inspired Network-Symbolic models do not compute precise 3-dimensional models, but convert image information into an "understandable" Network-Symbolic format, which is similar to relational knowledge models. Feature, symbol, and predicate are equivalent in the Network-Symbolic systems. A linking mechanism binds these features or symbols into coherent structures, and image converts from a "raster" into a "vector" representation that can be better interpreted by higher-level knowledge structures. Logic of visual scenes can be captured in the Network-Symbolic models and used for the disambiguation of visual information.

  6. Developing a Psychologically Inspired Cognitive Architecture for Robotic Control: The Symbolic and Subsymbolic Robotic Intelligence Control System (SS-RICS

    Directory of Open Access Journals (Sweden)

    Troy Dale Kelley

    2008-11-01

    Full Text Available This paper describes the ongoing development of a robotic control architecture that was inspired by computational cognitive architectures from the discipline of cognitive psychology. The robotic control architecture combines symbolic and subsymbolic representations of knowledge into a unified control structure. The architecture is organized as a goal driven, serially executing, production system at the highest symbolic level; and a multiple algorithm, parallel executing, simple collection of algorithms at the lowest subsymbolic level. The goal is to create a system that will progress through the same cognitive developmental milestones as do human infants. Common robotics problems of localization, object recognition, and object permanence are addressed within the specified framework.

  7. Developing a Psychologically Inspired Cognitive Architecture for Robotic Control: The Symbolic and Subsymbolic Robotic Intelligence Control System (SS-RICS

    Directory of Open Access Journals (Sweden)

    Troy Dale Kelley

    2006-09-01

    Full Text Available This paper describes the ongoing development of a robotic control architecture that was inspired by computational cognitive architectures from the discipline of cognitive psychology. The robotic control architecture combines symbolic and subsymbolic representations of knowledge into a unified control structure. The architecture is organized as a goal driven, serially executing, production system at the highest symbolic level; and a multiple algorithm, parallel executing, simple collection of algorithms at the lowest subsymbolic level. The goal is to create a system that will progress through the same cognitive developmental milestones as do human infants. Common robotics problems of localization, object recognition, and object permanence are addressed within the specified framework.

  8. Proximity measures in symbolic data analysis

    Directory of Open Access Journals (Sweden)

    Luciano Nieddu

    2007-10-01

    Full Text Available The Authors consider the general problem of similarity and dissimilarity measures in Symbolic Data Analysis. First of all they examine the classical definitions of elementary event, assertion object, hierarchical dependences and logical dependences. Then they consider some well-known measures of similarity and dissimilarity between two objects (Sokal-Michener, Roger-Tanimoto, Sokal-Sneath, Dice-Czekanowski-Sorenson, Russel-Rao. For resemblance measures based on aggregation functions, the authors consider the proposal of Gowda-Diday, De Baets et al., Malerba et al., Vladutu et al., and Ichino-Iyaghuchi. A paragraph is dedicated to the general algebraic structure; particularly to intervals and vector lattices in Banach space.

  9. Meta-Modeling by Symbolic Regression and Pareto Simulated Annealing

    NARCIS (Netherlands)

    Stinstra, E.; Rennen, G.; Teeuwen, G.J.A.

    2006-01-01

    The subject of this paper is a new approach to Symbolic Regression.Other publications on Symbolic Regression use Genetic Programming.This paper describes an alternative method based on Pareto Simulated Annealing.Our method is based on linear regression for the estimation of constants.Interval

  10. Symbolic processing methods for 3D visual processing

    Science.gov (United States)

    Tedder, Maurice; Hall, Ernest L.

    2001-10-01

    The purpose of this paper is to describe a theory that defines an open method for solving 3D visual data processing and artificial intelligence problems that is independent of hardware or software implementation. The goal of the theory is to generalize and abstract the process of 3D visual processing so that the method can be applied to a wide variety of 3D visual processing problems. Once the theory is described a heuristic derivation is given. Symbolic processing methods can be generalized into an abstract model composed of eight basic components. The symbolic processing model components are: input data; input data interface; symbolic data library; symbolic data environment space; relationship matrix; symbolic logic driver; output data interface and output data. An obstacle detection and avoidance experiment was constructed to demonstrate the symbolic processing method. The results of the robot obstacle avoidance experiment demonstrated that the mobile robot could successfully navigate the obstacle course using symbolic processing methods for the control software. The significance of the symbolic processing approach is that the method arrived at a solution by using a more formal quantifiable process. Some of the practical applications for this theory are: 3D object recognition, obstacle avoidance, and intelligent robot control.

  11. 281 Igbo Symbols: Developing Aesthetic Values on the Igbo Child ...

    African Journals Online (AJOL)

    Abstract. Ndi Igbo are known by their symbols. Aesthetic relates to the principles of beauty and taste of an art. Aesthetics and Ethics often overlap to the degree that this impression is embodied in a moral ethical code. The symbols in Igbo land are of the ethical codes of the society that project its aesthetic values as such they ...

  12. Sound symbolism in Iraqw literature | Mous | Kioo cha Lugha

    African Journals Online (AJOL)

    This article discusses the importance of conventionalised sound symbolism such as ideophones in Iraqw oral literature. It is argued that the meaning of ideophones is not referential but rather that they evoke an image. The study of the literary effect of sound symbolism in Iraqw riddles shows that emotive associations are not ...

  13. Symbolic universes between present and future of Europe

    DEFF Research Database (Denmark)

    Salvatore, Sergio; Fini, Viviana; Mannarini, Terri

    2018-01-01

    social and civic development. Moreover, the distribution of the symbolic universes, and therefore social and civic engagement, is demonstrated to be variable across the 4 countries in the analysis. Finally, we develop a retrospective reconstruction of the distribution of symbolic universes as well...

  14. Chemical Nomenclature, Symbols and Terminology for Use in School Science.

    Science.gov (United States)

    Smith, C. G.; And Others

    This report contains recommendations on chemical nomenclature, guidance on symbols, and terminology and units for physiochemical quantities. This report, intended to provide guidance to science teachers, consists of eleven sections: (1) general introduction; (2) introduction to symbols, terminology, and units for physiochemical quantities; (3)…

  15. Symbolic Form in the Pedagogical Implications of Sociolinguistics

    Science.gov (United States)

    Tolic, Mirela

    2011-01-01

    The author with the help of analysis of symbolic forms and sociolinguistics explains the transformation of "homo communicans in conscious homo symbolicum." He points out the importance of etymological analysis Cassierer's philosophy of symbolic forms and its effects in the modern understanding of sociolinguistics. It is necessary their…

  16. Igbo Symbols: Developing Aesthetic Values on the Igbo Child ...

    African Journals Online (AJOL)

    The findings of this work are that a lot of Igbo symbols abound and not much of them are transmitted to the younger generations. As a result, Igbo children do not use them or understand them as symbols rather they see them as ordinary words, expressions and objects. Therefore, the writers suggest that the Igbo child of ...

  17. A clash of symbolic universes: Judeanism vs Hellenism | Cromhout ...

    African Journals Online (AJOL)

    This article investigates how Judeans responded to Hellenism in order to maintain the integrity of their ethnic identity. Judeanism and Hellenism are regarded as alternative “symbolic universes”. It is shown that Judeans used various approaches to maintain their symbolic universe. This included Berger and Luckmann's ...

  18. Battering ram, ivory wall – phallic symbols and aggression in ...

    African Journals Online (AJOL)

    This study examines how symbolism is used to suggest sexual aggression in Shakespeare's The Rape of Lucrece. Symbols such as a Roman blade, a battering ram and other seemingly innocent objects in the poem are examined for implicit evidence of sexual conquest. The study argues that Shakespeare employs ...

  19. Hyperbolic lattice-point counting and modular symbols

    DEFF Research Database (Denmark)

    N. Petridis, Yiannis; Risager, Morten S.

    2009-01-01

    For a cocompact group $\\G$ of $\\slr$ we fix a real non-zero harmonic 1-form $\\alpha$. We study the asymptotics of the hyperbolic lattice-counting problem for $\\G$ under restrictions imposed by the modular symbols $\\modsym{\\gamma}{\\a}$. We prove that the normalized values of the modular symbols...

  20. Symbol Stream Combining in a Convolutionally Coded System

    Science.gov (United States)

    Mceliece, R. J.; Pollara, F.; Swanson, L.

    1985-01-01

    Symbol stream combining has been proposed as a method for arraying signals received at different antennas. If convolutional coding and Viterbi decoding are used, it is shown that a Viterbi decoder based on the proposed weighted sum of symbol streams yields maximum likelihood decisions.

  1. Adapting the Jukun Traditional Symbols for Textile Design and ...

    African Journals Online (AJOL)

    The uniqueness of Africa is not because of its geographical location, but because of its diverse rich cultural heritage, symbolic operation and adages that surround the entire spectrum of human learning, reasoning, and communication. This research work on adaptation of the Jukun cultural symbols for textile design gives a ...

  2. Different Grade Students' Use and Interpretation of Literal Symbols

    Science.gov (United States)

    Celik, Derya; Gunes, Gonul

    2013-01-01

    The aim of the study was to determine and compare 7th, 8th, and 9th grades students' level of use and interpret the literal symbols. In addition, students' responses to questions that require use of different roles of literal symbol were examined to identify the errors. For this purpose, Chelsea Diagnostics Algebra test developed by The Concepts…

  3. Symbols and definitions of quantities and units in isotope stoichiometry

    International Nuclear Information System (INIS)

    Junghans, P.; Krumbiegel, P.; Faust, H.

    1982-01-01

    On the basis of the International System of Units and recent recommendations of the IUPAC on 'Symbols and Terminology for Physicochemical Quantities and Units' a system is proposed of uniform and unambiguous symbols and definitions of quantities and units used in the isotope dilution technique. The close relationship between isotope stoichiometry and common stoichiometry is demonstrated. (author)

  4. Multiple-Symbol Detection Of Multiple-Trellis-Coded MDPSK

    Science.gov (United States)

    Divsalar, Dariush; Simon, Marvin K.; Shahshahani, Mehrdad M.

    1991-01-01

    In proposed scheme for detection and decoding of multiple-trellis-coded multilevel differential-phase-shift-keyed (MDPSK) radio signals, observation time for differential detection extended from conventional 2 to larger number of symbol periods. Decreases rate of error in differential detection of uncoded MDPSK by increasing number of symbol periods.

  5. Experimental targeting of chaos via controlled symbolic dynamics

    International Nuclear Information System (INIS)

    Corron, Ned J.; Pethel, Shawn D.

    2003-01-01

    In this Letter, we report experimental targeting in a chaotic system by controlling symbolic dynamics. We acquire and control an electronic circuit using small perturbations to elicit a desired objective state starting from an arbitrary, uncontrolled state. The control perturbations are calculated using a symbolic targeting sequence and applied using dynamic limiting control

  6. A Symbolic Approach to Permission Accounting for Concurrent Reasoning

    NARCIS (Netherlands)

    Huisman, Marieke; Mostowski, Wojciech

    2015-01-01

    Permission accounting is fundamental to modular, thread-local reasoning about concurrent programs. This paper presents a new, symbolic system for permission accounting. In existing systems, permissions are numeric value-based and refer to the current thread only. Our system is based on symbolic

  7. 40 CFR 90.303 - Symbols, acronyms, abbreviations.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Symbols, acronyms, abbreviations. 90.303 Section 90.303 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS... Equipment Provisions § 90.303 Symbols, acronyms, abbreviations. (a) The acronyms and abbreviations in § 90.5...

  8. Symbols of leadership and conceptions of power in Hausa literature ...

    African Journals Online (AJOL)

    Symbols of leadership and conceptions of power in Hausa literature: an intertextual reading of a Dodo folktale and a popular song. ... It reposes on an analysis of the manipulation of certain images and animal symbols of leadership and power borrowed from the world of tales used with a certain degree of innovation in order ...

  9. Meanings Given to Algebraic Symbolism in Problem-Posing

    Science.gov (United States)

    Cañadas, María C.; Molina, Marta; del Río, Aurora

    2018-01-01

    Some errors in the learning of algebra suggest that students might have difficulties giving meaning to algebraic symbolism. In this paper, we use problem posing to analyze the students' capacity to assign meaning to algebraic symbolism and the difficulties that students encounter in this process, depending on the characteristics of the algebraic…

  10. Aging and the number sense: preserved basic non-symbolic numerical processing and enhanced basic symbolic processing

    Directory of Open Access Journals (Sweden)

    Jade Eloise eNorris

    2015-07-01

    Full Text Available Aging often leads to general cognitive decline in domains such as memory and attention. The effect of aging on numerical cognition, particularly on foundational numerical skills known as the Number Sense, is not well known. Early research focused on the effect of aging on arithmetic. Recent studies have begun to investigate the impact of healthy aging on basic numerical skills, but focused on non-symbolic quantity discrimination alone. Moreover, contradictory findings have emerged. The current study aimed to further investigate the impact of aging on basic non-symbolic and symbolic numerical skills. A group of 25 younger (18-25 and 25 older adults (60-77 participated in non-symbolic and symbolic numerical comparison tasks. Mathematical and spelling abilities were also measured. Results showed that aging had no effect on foundational non-symbolic numerical skills, as both groups performed similarly (RTs, accuracy and Weber fractions (w. All participants showed decreased non-symbolic acuity (accuracy and w in trials requiring inhibition. However, aging appears to be associated with a greater decline in discrimination speed in such trials. Furthermore, aging seems to have a positive impact on mathematical ability and basic symbolic numerical processing, as older participants attained significantly higher mathematical achievement scores, and performed significantly better on the symbolic comparison task than younger participants. The findings suggest that aging and its lifetime exposure to numbers may lead to better mathematical achievement and stronger basic symbolic numerical skills. Our results further support the observation that basic non-symbolic numerical skills are resilient to aging, but that aging may exacerbate poorer performance on trials requiring inhibitory processes. These findings lend further support to the notion that preserved basic numerical skills in aging may reflect the preservation of an innate, primitive and embedded Number

  11. Computer-Assisted Organizing

    Science.gov (United States)

    Brunner, David James

    2009-01-01

    Organizing refers to methods of distributing physical and symbolic tasks among multiple agents in order to achieve goals. My dissertation investigates the dynamics of organizing in hybrid information processing systems that incorporate both humans and computers. To explain the behavior of these hybrid systems, I develop and partially test a theory…

  12. Mythology, Weltanschauung, symbolic universe and states of consciousness

    Directory of Open Access Journals (Sweden)

    Gert Malan

    2016-07-01

    Full Text Available This article investigates whether different religious (mythological worldviews can be described as alternative and altered states of consciousness (ASCs. Differences between conscious and unconscious motivations for behaviour are discussed before looking at ASCs, Weltanschauung and symbolic universes. Mythology can be described both as Weltanschauung and symbolic universe, functioning on all levels of consciousness. Different Weltanschauungen constitute alternative states of consciousness. Compared to secular worldviews, religious worldviews may be described as ASCs. Thanks to our globalised modern societies, the issue is even more complex, as alternate modernities lead to a symbolic multiverse, with individuals living in a social multiverse. Keyowrds: mythology; Weltanschauung; worldview; symbolic universe; states of consciousness; altered states of consciousness; alternative states of consciousness; symbolic multiverse; social multiverse

  13. Symbol addition by monkeys provides evidence for normalized quantity coding

    Science.gov (United States)

    Livingstone, Margaret S.; Pettine, Warren W.; Srihasam, Krishna; Moore, Brandon; Morocz, Istvan A.; Lee, Daeyeol

    2014-01-01

    Weber’s law can be explained either by a compressive scaling of sensory response with stimulus magnitude or by a proportional scaling of response variability. These two mechanisms can be distinguished by asking how quantities are added or subtracted. We trained Rhesus monkeys to associate 26 distinct symbols with 0–25 drops of reward, and then tested how they combine, or add, symbolically represented reward magnitude. We found that they could combine symbolically represented magnitudes, and they transferred this ability to a novel symbol set, indicating that they were performing a calculation, not just memorizing the value of each combination. The way they combined pairs of symbols indicated neither a linear nor a compressed scale, but rather a dynamically shifting, relative scaling. PMID:24753600

  14. Symbol lock detection implemented with nonoverlapping integration intervals

    Science.gov (United States)

    Shihabi, Mazen M. (Inventor); Hinedi, Sami M. (Inventor); Shah, Biren N. (Inventor)

    1995-01-01

    A symbol lock detector is introduced for an incoming coherent digital communication signal which utilizes a subcarrier modulated with binary symbol data, d(sub k), and known symbol interval T by integrating binary values of the signal over nonoverlapping first and second intervals selected to be T/2, delaying the first integral an interval T/2, and either summing or multiplying the second integral with the first one that preceded it to form a value X(sub k). That value is then averaged over a number M of symbol intervals to produce a static value Y. A symbol lock decision can then be made when the static value Y exceeds a threshold level delta.

  15. Symbolic interactionism as a theoretical perspective for multiple method research.

    Science.gov (United States)

    Benzies, K M; Allen, M N

    2001-02-01

    Qualitative and quantitative research rely on different epistemological assumptions about the nature of knowledge. However, the majority of nurse researchers who use multiple method designs do not address the problem of differing theoretical perspectives. Traditionally, symbolic interactionism has been viewed as one perspective underpinning qualitative research, but it is also the basis for quantitative studies. Rooted in social psychology, symbolic interactionism has a rich intellectual heritage that spans more than a century. Underlying symbolic interactionism is the major assumption that individuals act on the basis of the meaning that things have for them. The purpose of this paper is to present symbolic interactionism as a theoretical perspective for multiple method designs with the aim of expanding the dialogue about new methodologies. Symbolic interactionism can serve as a theoretical perspective for conceptually clear and soundly implemented multiple method research that will expand the understanding of human health behaviour.

  16. Multiple-Symbol Decision-Feedback Space-Time Differential Decoding in Fading Channels

    Directory of Open Access Journals (Sweden)

    Wang Xiaodong

    2002-01-01

    Full Text Available Space-time differential coding (STDC is an effective technique for exploiting transmitter diversity while it does not require the channel state information at the receiver. However, like conventional differential modulation schemes, it exhibits an error floor in fading channels. In this paper, we develop an STDC decoding technique based on multiple-symbol detection and decision-feedback, which makes use of the second-order statistic of the fading processes and has a very low computational complexity. This decoding method can significantly lower the error floor of the conventional STDC decoding algorithm, especially in fast fading channels. The application of the proposed multiple-symbol decision-feedback STDC decoding technique in orthogonal frequency-division multiplexing (OFDM system is also discussed.

  17. Couplings and recouplings of four angular momenta: Alternative 9j symbols and spin addition diagrams.

    Science.gov (United States)

    Santos, Robenilson F; Bitencourt, Ana Carla P; Ragni, Mirco; Prudente, Frederico V; Coletti, Cecilia; Marzuoli, Annalisa; Aquilanti, Vincenzo

    2017-04-01

    The Wigner 9j symbols of the first kind-also known as Fano X-coefficients-serve to connect different addition schemes of four angular momenta, widely known examples being the LS and the jj couplings in atomic, molecular, and nuclear spectroscopies. Here, we also consider alternative sequences of binary couplings of four angular momenta, which are dealt through the 9j symbols of the second kind, and are explicitly given by the pentagonal (or Biedenharn-Elliott) identity. These coefficients are essential ingredients in the quantum-mechanical treatments of rotational and polarization phenomena in reaction dynamics and photoinduced processes. We also emphasize the combinatorial structure underlying the extended construction of a previously introduced truncated icosahedral "abacus", and provide extensions useful for algebraical manipulations, semiclassical interpretations, and computational applications, including all the 120 addition schemes.

  18. A practical approach for writer-dependent symbol recognition using a writer-independent symbol recognizer.

    Science.gov (United States)

    LaViola, Joseph J; Zeleznik, Robert C

    2007-11-01

    We present a practical technique for using a writer-independent recognition engine to improve the accuracy and speed while reducing the training requirements of a writer-dependent symbol recognizer. Our writer-dependent recognizer uses a set of binary classifiers based on the AdaBoost learning algorithm, one for each possible pairwise symbol comparison. Each classifier consists of a set of weak learners, one of which is based on a writer-independent handwriting recognizer. During online recognition, we also use the n-best list of the writer-independent recognizer to prune the set of possible symbols and thus reduce the number of required binary classifications. In this paper, we describe the geometric and statistical features used in our recognizer and our all-pairs classification algorithm. We also present the results of experiments that quantify the effect incorporating a writer-independent recognition engine into a writer-dependent recognizer has on accuracy, speed, and user training time.

  19. Graphic Symbols as "The Mind on Paper": Links between Children's Interpretive Theory of Mind and Symbol Understanding

    Science.gov (United States)

    Myers, Lauren J.; Liben, Lynn S.

    2012-01-01

    Children gradually develop interpretive theory of mind (iToM)--the understanding that different people may interpret identical events or stimuli differently. The present study tested whether more advanced iToM underlies children's recognition that map symbols' meanings must be communicated to others when symbols are iconic (resemble their…

  20. New symbol launched to warn public about radiation dangers. Supplementary symbol aims to help reduce needless deaths and injuries

    International Nuclear Information System (INIS)

    2007-01-01

    Full text: With radiating waves, a skull and crossbones and a running person, a new ionizing radiation warning symbol is being introduced to supplement the traditional international symbol for radiation, the three cornered trefoil. The new symbol is being launched today by the IAEA and the International Organization for Standardization (ISO) to help reduce needless deaths and serious injuries from accidental exposure to large radioactive sources. It will serve as a supplementary warning to the trefoil, which has no intuitive meaning and little recognition beyond those educated in its significance. 'I believe the international recognition of the specific expertise of both organizations will ensure that the new standard will be accepted and applied by governments and industry to improve the safety of nuclear applications, protection of people and the environment', said Ms. Eliana Amaral, Director, Division of Radiation, Transport and Waste Safety, IAEA. The new symbol is aimed at alerting anyone, anywhere to the potential dangers of being close to a large source of ionizing radiation, the result of a five-year project conducted in 11 countries around the world. The symbol was tested with different population groups - mixed ages, varying educational backgrounds, male and female - to ensure that its message of 'danger- stay away' was crystal clear and understood by all. 'We can't teach the world about radiation,' said Carolyn Mac Kenzie, an IAEA radiation specialist who helped develop the symbol, 'but we can warn people about dangerous sources for the price of sticker.' The new symbol, developed by human factor experts, graphic artists, and radiation protection experts, was tested by the Gallup Institute on a total of 1 650 individuals in Brazil, Mexico, Morocco, Kenya, Saudi Arabia, China, India, Thailand, Poland, Ukraine and the United States. The symbol is intended for IAEA Category 1, 2 and 3 sources defined as dangerous sources capable of death or serious injury

  1. New symbol launched to warn public about radiation dangers. Supplementary symbol aims to help reduce needless deaths and injuries

    International Nuclear Information System (INIS)

    2007-01-01

    Full text: With radiating waves, a skull and crossbones and a running person, a new ionizing radiation warning symbol is being introduced to supplement the traditional international symbol for radiation, the three cornered trefoil. The new symbol is being launched today by the IAEA and the International Organization for Standardization (ISO) to help reduce needless deaths and serious injuries from accidental exposure to large radioactive sources. It will serve as a supplementary warning to the trefoil, which has no intuitive meaning and little recognition beyond those educated in its significance. 'I believe the international recognition of the specific expertise of both organizations will ensure that the new standard will be accepted and applied by governments and industry to improve the safety of nuclear applications, protection of people and the environment', said Ms. Eliana Amaral, Director, Division of Radiation, Transport and Waste Safety, IAEA. The new symbol is aimed at alerting anyone, anywhere to the potential dangers of being close to a large source of ionizing radiation, the result of a five-year project conducted in 11 countries around the world. The symbol was tested with different population groups - mixed ages, varying educational backgrounds, male and female - to ensure that its message of 'danger- stay away' was crystal clear and understood by all. 'We can't teach the world about radiation,' said Carolyn Mac Kenzie, an IAEA radiation specialist who helped develop the symbol, 'but we can warn people about dangerous sources for the price of sticker.' The new symbol, developed by human factor experts, graphic artists, and radiation protection experts, was tested by the Gallup Institute on a total of 1 650 individuals in Brazil, Mexico, Morocco, Kenya, Saudi Arabia, China, India, Thailand, Poland, Ukraine and the United States. The symbol is intended for IAEA Category 1, 2 and 3 sources defined as dangerous sources capable of death or serious injury

  2. New symbol launched to warn public about radiation dangers. Supplementary symbol aims to help reduce needless deaths and injuries

    International Nuclear Information System (INIS)

    2007-01-01

    Full text: With radiating waves, a skull and crossbones and a running person, a new ionizing radiation warning symbol is being introduced to supplement the traditional international symbol for radiation, the three cornered trefoil. The new symbol is being launched today by the IAEA and the International Organization for Standardization (ISO) to help reduce needless deaths and serious injuries from accidental exposure to large radioactive sources. It will serve as a supplementary warning to the trefoil, which has no intuitive meaning and little recognition beyond those educated in its significance. 'I believe the international recognition of the specific expertise of both organizations will ensure that the new standard will be accepted and applied by governments and industry to improve the safety of nuclear applications, protection of people and the environment', said Ms. Eliana Amaral, Director, Division of Radiation, Transport and Waste Safety, IAEA. The new symbol is aimed at alerting anyone, anywhere to the potential dangers of being close to a large source of ionizing radiation, the result of a five-year project conducted in 11 countries around the world. The symbol was tested with different population groups - mixed ages, varying educational backgrounds, male and female - to ensure that its message of 'danger- stay away' was crystal clear and understood by all. 'We can't teach the world about radiation,' said Carolyn Mac Kenzie, an IAEA radiation specialist who helped develop the symbol, 'but we can warn people about dangerous sources for the price of sticker.' The new symbol, developed by human factor experts, graphic artists, and radiation protection experts, was tested by the Gallup Institute on a total of 1 650 individuals in Brazil, Mexico, Morocco, Kenya, Saudi Arabia, China, India, Thailand, Poland, Ukraine and the United States. The symbol is intended for IAEA Category 1, 2 and 3 sources defined as dangerous sources capable of death or serious injury

  3. New symbol launched to warn public about radiation dangers. Supplementary symbol aims to help reduce needless deaths and injuries

    International Nuclear Information System (INIS)

    2007-01-01

    Full text: With radiating waves, a skull and crossbones and a running person, a new ionizing radiation warning symbol is being introduced to supplement the traditional international symbol for radiation, the three cornered trefoil. The new symbol is being launched today by the IAEA and the International Organization for Standardization (ISO) to help reduce needless deaths and serious injuries from accidental exposure to large radioactive sources. It will serve as a supplementary warning to the trefoil, which has no intuitive meaning and little recognition beyond those educated in its significance. 'I believe the international recognition of the specific expertise of both organizations will ensure that the new standard will be accepted and applied by governments and industry to improve the safety of nuclear applications, protection of people and the environment', said Ms. Eliana Amaral, Director, Division of Radiation, Transport and Waste Safety, IAEA. The new symbol is aimed at alerting anyone, anywhere to the potential dangers of being close to a large source of ionizing radiation, the result of a five-year project conducted in 11 countries around the world. The symbol was tested with different population groups - mixed ages, varying educational backgrounds, male and female - to ensure that its message of 'danger- stay away' was crystal clear and understood by all. 'We can't teach the world about radiation,' said Carolyn Mac Kenzie, an IAEA radiation specialist who helped develop the symbol, 'but we can warn people about dangerous sources for the price of sticker.' The new symbol, developed by human factor experts, graphic artists, and radiation protection experts, was tested by the Gallup Institute on a total of 1 650 individuals in Brazil, Mexico, Morocco, Kenya, Saudi Arabia, China, India, Thailand, Poland, Ukraine and the United States. The symbol is intended for IAEA Category 1, 2 and 3 sources defined as dangerous sources capable of death or serious injury

  4. When math operations have visuospatial meanings versus purely symbolic definitions: Which solving stages and brain regions are affected?

    Science.gov (United States)

    Pyke, Aryn A; Fincham, Jon M; Anderson, John R

    2017-06-01

    How does processing differ during purely symbolic problem solving versus when mathematical operations can be mentally associated with meaningful (here, visuospatial) referents? Learners were trained on novel math operations (↓, ↑), that were defined strictly symbolically or in terms of a visuospatial interpretation (operands mapped to dimensions of shaded areas, answer = total area). During testing (scanner session), no visuospatial representations were displayed. However, we expected visuospatially-trained learners to form mental visuospatial representations for problems, and exhibit distinct activations. Since some solution intervals were long (~10s) and visuospatial representations might only be instantiated in some stages during solving, group differences were difficult to detect when treating the solving interval as a whole. However, an HSMM-MVPA process (Anderson and Fincham, 2014a) to parse fMRI data identified four distinct problem-solving stages in each group, dubbed: 1) encode; 2) plan; 3) compute; and 4) respond. We assessed stage-specific differences across groups. During encoding, several regions implicated in general semantic processing and/or mental imagery were more active in visuospatially-trained learners, including: bilateral supramarginal, precuneus, cuneus, parahippocampus, and left middle temporal regions. Four of these regions again emerged in the computation stage: precuneus, right supramarginal/angular, left supramarginal/inferior parietal, and left parahippocampal gyrus. Thus, mental visuospatial representations may not just inform initial problem interpretation (followed by symbolic computation), but may scaffold on-going computation. In the second stage, higher activations were found among symbolically-trained solvers in frontal regions (R. medial and inferior and L. superior) and the right angular and middle temporal gyrus. Activations in contrasting regions may shed light on solvers' degree of use of symbolic versus mental

  5. Symbolic representation and visual querying of left ventricular image sequences.

    Science.gov (United States)

    Baroni, M; Del Bimbo, A; Evangelist, A; Vicario, E

    1999-01-01

    In the evaluation of regional left ventricular function, relevant cardiac disorders manifest themselves not only in static features, such as shape descriptors and motion excursion in end-diastolic and end-systolic frames, but also in their temporal evolution. In common diagnostic practice, such dynamic patterns are analysed by direct inspection of frame sequences through the use of a moviola. This permits only a subjective and poorly defined evaluation of functional parameters, and definitely prevents a systematic and reproducible analysis of large sets of reports. Retrieval by contents techniques may overcome this limitation by permitting the automatic comparison of the reports in a database against queries expressing descriptive properties related to significant pathological conditions. A system is presented which is aimed at investigating the potential of this approach by supporting retrieval by contents from a database of cineangiographic or echocardiographic images. The system relies on a symbolic description of both geometrical and temporal properties of left ventricular contours. This is derived automatically by an image processing and interpretation module and associated with the report at its storage time. In the retrieval stage, queries are expressed by means of an iconic visual language which describes searched content properties over a computer screen. The system automatically interprets iconic statements and compares them against concrete descriptions in the database. This enables medical users to interact with the system to search for motion and shape abnormalities on a regional basis, in single or homogeneous groups of reports, so as to enable both prospective and retrospective diagnosis.

  6. Graphic Symbol Recognition using Graph Based Signature and Bayesian Network Classifier

    OpenAIRE

    Luqman, Muhammad Muzzamil; Brouard, Thierry; Ramel, Jean-Yves

    2010-01-01

    We present a new approach for recognition of complex graphic symbols in technical documents. Graphic symbol recognition is a well known challenge in the field of document image analysis and is at heart of most graphic recognition systems. Our method uses structural approach for symbol representation and statistical classifier for symbol recognition. In our system we represent symbols by their graph based signatures: a graphic symbol is vectorized and is converted to an attributed relational g...

  7. SYSTEMATIC PRINCIPLES AND METHODS OF SYMBOLIC APPROACHES IN URBAN DESIGN

    Directory of Open Access Journals (Sweden)

    BULAKH I. V

    2015-12-01

    Full Text Available Formulation of the problem. The low level of expression and personalization of mass architecture of the second half of the twentieth century connected with the spread of industrial technology and even to a greater extent with mechanistic traditionally functional relation to the average person as, abstract consumer architecture. The condition out of the critical situation is focusing on matters aesthetic, artistic understanding and harmonious image creation environment. The problem of increasing architectural and artistic level of architectural and urban planning solutions to overcome the monotony of planning and development, creating aesthetically expressive urban environment does not lose relevance over the past decades. Understanding and acceptance of enigma and dynamic development of cities encourage architects to find new design techniques that are able to provide in the future a reasonable possibility of forming artistic and aesthetic image of the modern city. Purpose. Define and systematize the principles of symbolization architectural and planning images; propose methods symbolism in the architectural planning of image of the urban environment. Conclusion based on analysis of the enhanced concept symbolizing the image of Architecture and Planning, the place, role and symbolization trends at all levels of the urban environment - planning, three-dimensional and improvement of urban areas; first identified the main stages and levels of symbolization (analohyzatsyya, schematization and alehoryzatsiya, their features and characteristics, formulated the basic principles of symbolization architectural and planning of image, namely the principles of communication between figurative analogies, transformation of subsequent circuits, switching allegorical groupings and metamorfizm ultimate goal – symbol birth .

  8. Circular blurred shape model for multiclass symbol recognition.

    Science.gov (United States)

    Escalera, Sergio; Fornés, Alicia; Pujol, Oriol; Lladós, Josep; Radeva, Petia

    2011-04-01

    In this paper, we propose a circular blurred shape model descriptor to deal with the problem of symbol detection and classification as a particular case of object recognition. The feature extraction is performed by capturing the spatial arrangement of significant object characteristics in a correlogram structure. The shape information from objects is shared among correlogram regions, where a prior blurring degree defines the level of distortion allowed in the symbol, making the descriptor tolerant to irregular deformations. Moreover, the descriptor is rotation invariant by definition. We validate the effectiveness of the proposed descriptor in both the multiclass symbol recognition and symbol detection domains. In order to perform the symbol detection, the descriptors are learned using a cascade of classifiers. In the case of multiclass categorization, the new feature space is learned using a set of binary classifiers which are embedded in an error-correcting output code design. The results over four symbol data sets show the significant improvements of the proposed descriptor compared to the state-of-the-art descriptors. In particular, the results are even more significant in those cases where the symbols suffer from elastic deformations.

  9. Symbolic analysis of spatio-temporal systems: The measurement problem

    International Nuclear Information System (INIS)

    Brown, R.; Tang, Xianzhu; Tracy, E.R.

    1996-01-01

    We consider the problem of measuring physical quantities using time-series observations. The approach taken is to validate theoretical models which are derived heuristically or from first principles. The fitting of parameters in such models constitutes the measurement. This is a basic problem in measurement science and a wide array of tools are available. However, an important gap in the present toolkit exists when the system of interest, and hence the models used, exhibit chaotic or turbulent behavior. The development of reliable schemes for analyzing such signals is necessary before one can claim to have a quantitative understanding of the underlying physics. In experimental situations, the number of independently measured time-series is limited, but the number of dynamical degrees of freedom can be large. In addition, the signals of interest will typically be embedded in a noisy background. In the symbol statistics approach, the time-series is coarse-grained and converted into a long, symbol stream. The probability of occurrence of various symbol sequences of fixed length constitutes the symbol statistics. These statistics contain a wealth of information about the underlying dynamics and, as we shall discuss, can be used to validate models. Previously, we have applied this symbolic approach to low dimensional systems with great success. The symbol statistics are robust up to noise/signal ∼20%. At higher noise levels the symbol statistics are biased, but in a relatively simple manner. By including the noise characteristics into the model, we were able to use the symbol statistics to measure parameters even when signal/noise is ∼ O(1). More recently, we have extended the symbolic approach to spatio-temporal systems. We have considered both coupled-map lattices and the complex Ginzburg-Landau equation. This equation arises generically near the onset of instabilities

  10. Sandplay in Jungian analysis: matter and symbolic integration.

    Science.gov (United States)

    Castellana, Franco; Donfrancesco, Antonietta

    2005-06-01

    Jung described a way of thinking, tied to sensations and feelings, that is a thought connected to the body. Again in The Archetypes and the Collective Unconscious, Jung (1954) speaks of the symbol as a 'live body', corpus et anima. If the mind cannot credit itself with the discomfort that manifests through the body, this is a sign of a separation between mind and body. A consequence of all this is the literalization of the discomfort which makes it impossible to have a symbolic dimension. Therapy activates a process in which the patient can move from a stage of separation to a possible connection between mind and body, resulting in changes in the level of communication and of awareness. The mind opens itself to symbolization and the body becomes a field for a common language. From our reflections we have come to ascertain that we can speak of analysis only when an imaginary space is achieved, an intermediate space between the patient and the analyst, a space that is created from the intertwining of the symbolic capability of the patient with that of the analyst. Focusing our attention on the use of sandplay in analytic therapy, we know that one puts in the sand box objects that are marks of our psyche, visible traits that contain actions, corporeal movements and feelings. When one focuses on the overall representation built, one can go beyond the literal image and the analyst, keeping alive the image through his symbolic capability, opens the possibility of a dialogue with the symbolic dimension. The imagination as a symbolic thought is the humus that allows the analyst to maintain the intermediate symbolic level open by activating a symbolic process within the dialectic of the analysis.

  11. [Pierre Bourdieu: sociology as a "symbolic revolution"].

    Science.gov (United States)

    Suaud, Charles

    2014-03-01

    The article combines two objectives: understand the genesis and development of the sociology of Bourdieu in connection with his social and intellectual positioning. The sociology of Bourdieu is a theory of Action which reconciles the double requirement of objectification and taking account of the practical logic bound by social agents. From the character both objective and subjective of social space, he analyzes how different institutions (firstly School) are doing that mental structures match the objective structures of society. By making acceptable reality and registering it in the body, these instances contribute to reproduce social divisions and participate in the work of domination. Gradually, Bourdieu develops a general theory about Power, which leads to a sociology of State. But he refuses any sociological fatalism. Because he perceived homologies between the sociologist and the artist facing the social order, each in their own way, he devoted two researches to Flaubert and Manet, seized in the same enterprise of aesthetic subversion he described as a 'symbolic revolution'. In many aspects, the sociology of Bourdieu opens ways of looking for an objectification of caregivers and their practices.

  12. Sarawak Bamboo Craft: Symbolism and Phenomenon

    Directory of Open Access Journals (Sweden)

    Arshad Mohd Zaihidee

    2014-04-01

    Full Text Available The relationship between human beings and their environment has stirred reactions between nature and the development of mind and actions that can be discussed using interdisciplinary approaches such as psychology, sociology, anthropology and history, in understanding human thinking and behavior. A psychological approach is intended to evaluate the individual choices and needs in society. A sociological approach details the various patterns in the social organization. An anthropological approach is tied with culture and belief to fulfil human needs which are based on their habitat, while a historical approach looks at the development which is related to the past. Dimensions of experiences, order and logic, selective elaboration and expressions are used to analyze the bamboo craft of Iban, Melanau and Bidayuh societies in Sarawak long-houses. The existence of constitutive, moral, expressive and cognitive symbols has been interpreted based on a theoretical framework that has been developed by Langer Art Theory, Parsons Social Theory and Kaplan Culture Theory. The values and meaning formed are interpreted to understand matters related to the lives of villagers and the finding suggests that bamboo craft expresses the multi-ethnic mind and character in the socio-culture of long- houses in Sarawak.

  13. Entropy estimation of very short symbolic sequences

    Science.gov (United States)

    Lesne, Annick; Blanc, Jean-Luc; Pezard, Laurent

    2009-04-01

    While entropy per unit time is a meaningful index to quantify the dynamic features of experimental time series, its estimation is often hampered in practice by the finite length of the data. We here investigate the performance of entropy estimation procedures, relying either on block entropies or Lempel-Ziv complexity, when only very short symbolic sequences are available. Heuristic analytical arguments point at the influence of temporal correlations on the bias and statistical fluctuations, and put forward a reduced effective sequence length suitable for error estimation. Numerical studies are conducted using, as benchmarks, the wealth of different dynamic regimes generated by the family of logistic maps and stochastic evolutions generated by a Markov chain of tunable correlation time. Practical guidelines and validity criteria are proposed. For instance, block entropy leads to a dramatic overestimation for sequences of low entropy, whereas it outperforms Lempel-Ziv complexity at high entropy. As a general result, the quality of entropy estimation is sensitive to the sequence temporal correlation hence self-consistently depends on the entropy value itself, thus promoting a two-step procedure. Lempel-Ziv complexity is to be preferred in the first step and remains the best estimator for highly correlated sequences.

  14. Communication and citizenship. Symbolic integration in Maracaibo.

    Directory of Open Access Journals (Sweden)

    Orlando Villalobos

    2006-04-01

    Full Text Available This study attempts to establish the impact of communication in the social network that constitutes Maracaibo. For this purpose we approach the problem from the perspective of Maracaibo society. Relations that emerge from two perspectives are considered, interpersonal and group relations, based on the perspective of mass media. We begin by recognizing the general effects of mass media, but the study attempts to transcend this limitation. Communication is understood as a more wide ranging exercise that includes the distinct forms of social interaction that are produced in the community. From a methodological point of view, we apply a focus based on a qualitative epistemic perspective. We attempt to value subjectivity as a form of knowledge. The conclusion is that collective imaginary is influenced by mass communication. This is reflected in the symbols that identify Maracaibo residents. However, mass means of communication do not reflect the city sufficiently. In interpersonal and group relations, we observe that there has been a loss of sense of community. This loss becomes a debilitating cause in the construction of citizenship.

  15. A Dynamic Perspective on Symbolic Co-branding

    DEFF Research Database (Denmark)

    von Wallpach, Sylvia; Backhausen, Mia

    2016-01-01

    brand’s meaning—a challenge that is accentuated when multiple brands form alliances. Focusing on symbolic co-branding, this paper aims to understand how involved brands’ meaning arises from discursive interactions in stakeholder networks (including brand management). A netnographic study in the context...... of lifestyle and fashion blogs provides in-depth insights into the evolvement of two symbolic co-branding processes. The results highlight various stakeholders’ role in and discursive strategies of creating and transferring meaning between involved brands and add unprecedented insights into symbolic co-branding...... as a continuous process of brand meaning co-creation....

  16. Symbolic Game Semantics for Model Checking Program Families

    DEFF Research Database (Denmark)

    Dimovski, Aleksandar

    2016-01-01

    . In this paper, we propose an efficient game semantics based approach for verifying open program families, i.e. program families with free (undefined) identifiers. We use symbolic representation of algorithmic game semantics, where concrete values are replaced with symbolic ones. In this way, we can compactly...... represent program families with infinite integers as so-called (finite-state) featured symbolic automata. Specifically designed model checking algorithms are then employed to verify safety of all programs from a family at once and pinpoint those programs that are unsafe (respectively, safe). We present...

  17. Manual of symbols and terminology for physicochemical quantities and units

    CERN Document Server

    Whiffen, D H

    2013-01-01

    Manual of Symbols and Terminology for Physicochemical Quantities and Units, 1979 Edition contains physical quantity tabulations of products. The Commission on Symbols, Terminology, and Units is a part of the Division of Physical Chemistry of the International Union of Pure and Applied Chemistry. Its general responsibilities are to secure clarity and precision, and wider agreement in the use of symbols, by chemists in different countries, among physicists, chemists, and engineers, and by editors of scientific journals. This book is composed of 13 chapters, and begins with the determination o

  18. Color and symbology: symbolic systems of color ordering

    Science.gov (United States)

    Varela, Diana

    2002-06-01

    Color has been used symbolically in various different fields, such as Heraldry, Music, Liturgy, Alchemy, Art and Literature. In this study, we shall investigate and analyse the structures of relationships that have taken shape as symbolic systems within each specific area of analysis. We shall discuss the most significant symbolic fields and their systems of color ording, considering each one of them as a topological model based on a logic that determines the total organization, according to the scale of reciprocities applied, and the cultural context that gives it meaning.

  19. Symbol-stream Combiner: Description and Demonstration Plans

    Science.gov (United States)

    Hurd, W. J.; Reder, L. J.; Russell, M. D.

    1984-01-01

    A system is described and demonstration plans presented for antenna arraying by symbol stream combining. This system is used to enhance the signal-to-noise ratio of a spacecraft signals by combining the detected symbol streams from two or more receiving stations. Symbol stream combining has both cost and performance advantages over other arraying methods. Demonstrations are planned on Voyager 2 both prior to and during Uranus encounter. Operational use is possible for interagency arraying of non-Deep Space Network stations at Neptune encounter.

  20. The Symbolism of Colour in the Modern German Youth Slang

    Directory of Open Access Journals (Sweden)

    Tetiana Shavlovska

    2016-08-01

    Full Text Available The article is devoted to the study of one of the most interesting for the research group of words – colour definitions – in the modern German youth slang. Different peoples created definite symbols of colours, still existing nowadays. Even at present time the problem of colour symbolism is one of the most significant while studying the interrelation between the colour and the psychic of a person. Youth is the most progressive, emotional and creative group of the society, that is why the study of such phenomenon as colour symbolism as the example of youth slang – is especially important for the modern linguocultural study and social linguistics.

  1. Implementation of cartographic symbols for planetary mapping in geographic information systems

    Science.gov (United States)

    Nass, A.; van Gasselt, S.; Jaumann, R.; Asche, H.

    2011-09-01

    The steadily growing international interest in the exploration of planets in our Solar System and many advances in the development of space-sensor technology have led to the launch of a multitude of planetary missions to Mercury, Venus, the Earth's moon, Mars and various Outer-Solar System objects, such as the Jovian and Saturnian satellites. Camera instruments carried along on these missions image surfaces in different wavelength ranges and under different viewing angles, permitting additional data to be derived, such as spectral data or digital terrain models. Such data enable researchers to explore and investigate the development of planetary surfaces by analyzing and interpreting the inventory of surface units and structures. Results of such work are commonly abstracted and represented in thematic, mostly geological and geomorphological, maps. In order to facilitate efficient collaboration among different planetary research disciplines, mapping results need to be prepared, described, managed, archived, and visualized in a uniform way. These tasks have been increasingly carried out by means of computer-based geographic information systems (GIS or GI systems) which have come to be widely employed in the field of planetary research since the last two decades. In this paper we focus on the simplification of mapping processes, putting specific emphasis on a cartographically correct visualization of planetary mapping data using GIS-based environments. We present and discuss the implementation of a set of standardized cartographic symbols for planetary mapping based on the Digital Cartographic Standard for Geologic Map Symbolization as prepared by the United States Geological Survey (USGS) for the Federal Geographic Data Committee (FGDC). Furthermore, we discuss various options to integrate this symbol catalog into generic GI systems, and more specifically into the Environmental Systems Research Institute's (ESRI) ArcGIS environment, and focus on requirements for

  2. Analysis of an integrated energy system under variable loads through the symbolic exergoeconomics. 1

    International Nuclear Information System (INIS)

    Lazzaretto, A.; Macor, A.; Mirandola, A.; Reini, M.

    1992-01-01

    This paper is used to analyze an energy recovery and cogenerative plant made up of a turboexpander of natural gas and two cogenerative engines. By means of a mathematical symbolic computer program, the Symbolic Exergoeconomic methodology obtains the algebraic formulae for the total plant efficiency and any other thermodynamic variable as a function of the exergetic efficiencies of the subsystems, the exergy bifurcation ratios and either the system's input or output flows. The exergy flows of the plant, obtained by the thermodynamic simulator, can be used to calculate the numerical values of the exergetic efficiencies and of the exergy bifurcation ratios. By substituting these values in the symbolic formulae it is possible to numerically evaluate the apportionment of the input resources, throughout the plant structure an its components, on the products of the plant. This is useful to determine the true utilization coefficients of each fuel and to quantify how it affects the total efficiency of the plant. Since the behavior of the plant is much different depending on the value of the gas flow rate at the inlet, the annual gas flow rate duration curve has been discretized into five steps, corresponding to four operating configurations in which different depending on the value of the gas flow rate at the inlet, the annual gas flow rate duration curve has been discretized into five steps, corresponding to four operating configurations in which different sets of components are working; the mentioned procedure has been applied to each operating configuration

  3. Kindergarteners' performance in a sound-symbol paradigm predicts early reading.

    Science.gov (United States)

    Horbach, Josefine; Scharke, Wolfgang; Cröll, Jennifer; Heim, Stefan; Günther, Thomas

    2015-11-01

    The current study examined the role of serial processing of newly learned sound-symbol associations in early reading acquisition. A computer-based sound-symbol paradigm (SSP) was administered to 243 children during their last year of kindergarten (T1), and their reading performance was assessed 1 year later in first grade (T2). Results showed that performance on the SSP measured before formal reading instruction was associated with later reading development. At T1, early readers performed significantly better than nonreaders in learning correspondences between sounds and symbols as well as in applying those correspondences in a serial manner. At T2, SSP performance measured at T1 was positively associated with reading performance. Importantly, serial application of newly learned correspondences at T1 explained unique variance in first-grade reading performance in nonreaders over and above other verbal predictors, including phonological awareness, verbal short-term memory, and rapid automatized naming. Consequently, the SSP provides a promising way to study aspects of reading in preliterate children. Copyright © 2015 Elsevier Inc. All rights reserved.

  4. A method of recovering the initial vectors of globally coupled map lattices based on symbolic dynamics

    International Nuclear Information System (INIS)

    Sun Li-Sha; Kang Xiao-Yun; Zhang Qiong; Lin Lan-Xin

    2011-01-01

    Based on symbolic dynamics, a novel computationally efficient algorithm is proposed to estimate the unknown initial vectors of globally coupled map lattices (CMLs). It is proved that not all inverse chaotic mapping functions are satisfied for contraction mapping. It is found that the values in phase space do not always converge on their initial values with respect to sufficient backward iteration of the symbolic vectors in terms of global convergence or divergence (CD). Both CD property and the coupling strength are directly related to the mapping function of the existing CML. Furthermore, the CD properties of Logistic, Bernoulli, and Tent chaotic mapping functions are investigated and compared. Various simulation results and the performances of the initial vector estimation with different signal-to-noise ratios (SNRs) are also provided to confirm the proposed algorithm. Finally, based on the spatiotemporal chaotic characteristics of the CML, the conditions of estimating the initial vectors using symbolic dynamics are discussed. The presented method provides both theoretical and experimental results for better understanding and characterizing the behaviours of spatiotemporal chaotic systems. (general)

  5. Anomaly Detection and Diagnosis Algorithms for Discrete Symbols

    Data.gov (United States)

    National Aeronautics and Space Administration — We present a set of novel algorithms which we call sequenceMiner that detect and characterize anomalies in large sets of high-dimensional symbol sequences that arise...

  6. Combining geometric matching with SVM to improve symbol spotting

    Science.gov (United States)

    Nayef, Nibal; Breuel, Thomas M.

    2013-01-01

    Symbol spotting is important for automatic interpretation of technical line drawings. Current spotting methods are not reliable enough for such tasks due to low precision rates. In this paper, we combine a geometric matching-based spotting method with an SVM classifier to improve the precision of the spotting. In symbol spotting, a query symbol is to be located within a line drawing. Candidate matches can be found, however, the found matches may be true or false. To distinguish a false match, an SVM classifier is used. The classifier is trained on true and false matches of a query symbol. The matches are represented as vectors that indicate the qualities of how well the query features are matched, those qualities are obtained via geometric matching. Using the classification, the precision of the spotting improved from an average of 76.6% to an average of 97.2% on a database of technical line drawings.

  7. Symbolic BDD and ADD Algorithms for Energy Games

    Directory of Open Access Journals (Sweden)

    Shahar Maoz

    2016-11-01

    Full Text Available Energy games, which model quantitative consumption of a limited resource, e.g., time or energy, play a central role in quantitative models for reactive systems. Reactive synthesis constructs a controller which satisfies a given specification, if one exists. For energy games a synthesized controller ensures to satisfy not only the safety constraints of the specification but also the quantitative constraints expressed in the energy game. A symbolic algorithm for energy games, recently presented by Chatterjee et al., is symbolic in its representation of quantitative values but concrete in the representation of game states and transitions. In this paper we present an algorithm that is symbolic both in the quantitative values and in the underlying game representation. We have implemented our algorithm using two different symbolic representations for reactive games, Binary Decision Diagrams (BDD and Algebraic Decision Diagrams (ADD. We investigate the commonalities and differences of the two implementations and compare their running times on specifications of energy games.

  8. Odor mixture alters neural resources during symbolic problem solving.

    Science.gov (United States)

    Lorig, Tyler S; Malin, Emily L; Horwitz, Julie E

    2005-05-01

    The smell of a cup of coffee is produced by many different odor chemicals combined in a mixture, yet the perception of that odor is of a single unified whole. Recent evidence has demonstrated that mixtures of odors share some of the same spatiotemporal features of speech sounds and may use similar brain resources in associating those features with the symbols they represent. This experiment investigated the hypothesis that an odor mixture would interfere with a math task that requires symbolic but not spatial processing. Results indicated the pattern of brain electrical activity was similar for the single odors and the mixture during spatial processing. During solution of the task requiring symbolic processing, the odor mixture produced a pattern of brain electrical activity different from the single odorants. These data suggest that the perception of odor mixtures may use some of the same resources associated with symbolic processing.

  9. 40 CFR 1042.905 - Symbols, acronyms, and abbreviations.

    Science.gov (United States)

    2010-07-01

    ... Definitions and Other Reference Information § 1042.905 Symbols, acronyms, and abbreviations. The following... Archives and Records Administration. NMHCnonmethane hydrocarbons. NOXoxides of nitrogen (NO and NO2.... SCRselective catalytic reduction. THCtotal hydrocarbon. THCEtotal hydrocarbon equivalent. ULSDultra low-sulfur...

  10. Advanced symbolic analysis for VLSI systems methods and applications

    CERN Document Server

    Shi, Guoyong; Tlelo Cuautle, Esteban

    2014-01-01

    This book provides comprehensive coverage of the recent advances in symbolic analysis techniques for design automation of nanometer VLSI systems. The presentation is organized in parts of fundamentals, basic implementation methods and applications for VLSI design. Topics emphasized include  statistical timing and crosstalk analysis, statistical and parallel analysis, performance bound analysis and behavioral modeling for analog integrated circuits . Among the recent advances, the Binary Decision Diagram (BDD) based approaches are studied in depth. The BDD-based hierarchical symbolic analysis approaches, have essentially broken the analog circuit size barrier. In particular, this book   • Provides an overview of classical symbolic analysis methods and a comprehensive presentation on the modern  BDD-based symbolic analysis techniques; • Describes detailed implementation strategies for BDD-based algorithms, including the principles of zero-suppression, variable ordering and canonical reduction; • Int...

  11. A Theory of Developing Competence with Written Mathematical Symbols.

    Science.gov (United States)

    Hiebert, James

    1988-01-01

    Presented is a theory of how competence with written mathematical symbols develops, tracing a succession of cognitive processes that cumulate to yield competence. Arguments supporting the theory are drawn from the history, philosophy, and psychology of mathematics. (MNS)

  12. Issues in symbol design for electronic displays of navigation information

    Science.gov (United States)

    2004-10-24

    An increasing number of electronic displays, ranging from small hand-held displays for general aviation to installed displays for air transport, are showing navigation information, such as symbols representing navigational aids. The wide range of dis...

  13. Monkeys display classic signatures of human symbolic arithmetic.

    Science.gov (United States)

    Cantlon, Jessica F; Merritt, Dustin J; Brannon, Elizabeth M

    2016-03-01

    Non-human primates compare quantities in a crude manner, by approximating their values. Less is known about the mental transformations that non-humans can perform over approximate quantities, such as arithmetic transformations. There is evidence that human symbolic arithmetic has a deep psychological connection with the primitive, approximate forms of quantification of non-human animals. Here, we ask whether the subtle performance signatures that humans exhibit during symbolic arithmetic also bear a connection to primitive arithmetic. Specifically, we examined the problem size effect, the tie effect, and the practice effect-effects which are commonly observed in children's math performance in school. We show that, like humans, monkeys exhibited the problem size and tie effects, indicating commonalities in arithmetic algorithms with humans. Unlike humans, however, monkeys did not exhibit a practice effect. Together, these findings provide new evidence for a cognitive relation between non-symbolic and symbolic arithmetic.

  14. A STUDY OF SYMBOLIC RELATIONS IN PUBLIC TRANSPORT

    Directory of Open Access Journals (Sweden)

    ANDREI BALAN

    2011-04-01

    Full Text Available This paper presents an anthropological, exploratory study of the microsocial world of public transport. Our research focuses on the symbolic relations that are being established (verbally or nonverbally between urban transport travellers that do not know each other and the consequences these relations create. Modern urban configuration forces large numbers of individuals to share public space every day. When this space becomes restrictive, symbolic relations and interpersonal behaviors such as territoriality and personal space management become clearer. Due to overcrowding, public transport is the scene of one of the most restrictive public spaces in a city. The challenge was to observe and interpret daily, casual behaviors through a sociological and psychological scheme, following the methodological tradition established by Erving Goffman and the other symbolic interactionists. Finally, our study generates a number of hypotheses and explanatory models for common practices and behaviors in trams and metros regarded from a symbolic perspective.

  15. The relationship between symbolic interactionism and interpretive description.

    Science.gov (United States)

    Oliver, Carolyn

    2012-03-01

    In this article I explore the relationship between symbolic interactionist theory and interpretive description methodology. The two are highly compatible, making symbolic interactionism an excellent theoretical framework for interpretive description studies. The pragmatism underlying interpretive description supports locating the methodology within this cross-disciplinary theory to make it more attractive to nonnursing researchers and expand its potential to address practice problems across the applied disciplines. The theory and method are so compatible that symbolic interactionism appears to be part of interpretive description's epistemological foundations. Interpretive description's theoretical roots have, to date, been identified only very generally in interpretivism and the philosophy of nursing. A more detailed examination of its symbolic interactionist heritage furthers the contextualization or forestructuring of the methodology to meet one of its own requirements for credibility.

  16. Pilot stereotypes for navigation symbols on electronic displays

    Science.gov (United States)

    2006-09-20

    There is currently no common symbology standard for the : electronic display of navigation information. The wide : range of display technologies and the different functions : these displays support make it difficult to design symbols : that are easil...

  17. Multiple symbol partially coherent detection of MPSK

    Science.gov (United States)

    Simon, M. K.; Divsalar, D.

    1992-01-01

    It is shown that by using the known (or estimated) value of carrier tracking loop signal to noise ratio (SNR) in the decision metric, it is possible to improve the error probability performance of a partially coherent multiple phase-shift-keying (MPSK) system relative to that corresponding to the commonly used ideal coherent decision rule. Using a maximum-likeihood approach, an optimum decision metric is derived and shown to take the form of a weighted sum of the ideal coherent decision metric (i.e., correlation) and the noncoherent decision metric which is optimum for differential detection of MPSK. The performance of a receiver based on this optimum decision rule is derived and shown to provide continued improvement with increasing length of observation interval (data symbol sequence length). Unfortunately, increasing the observation length does not eliminate the error floor associated with the finite loop SNR. Nevertheless, in the limit of infinite observation length, the average error probability performance approaches the algebraic sum of the error floor and the performance of ideal coherent detection, i.e., at any error probability above the error floor, there is no degradation due to the partial coherence. It is shown that this limiting behavior is virtually achievable with practical size observation lengths. Furthermore, the performance is quite insensitive to mismatch between the estimate of loop SNR (e.g., obtained from measurement) fed to the decision metric and its true value. These results may be of use in low-cost Earth-orbiting or deep-space missions employing coded modulations.

  18. Parallel symbolic execution for automated real-world software testing

    OpenAIRE

    Bucur, Stefan; Ureche, Vlad; Zamfir, Cristian; Candea, George

    2011-01-01

    This paper introduces Cloud9, a platform for automated testing of real-world software. Our main contribution is the scalable parallelization of symbolic execution on clusters of commodity hardware, to help cope with path explosion. Cloud9 provides a systematic interface for writing "symbolic tests" that concisely specify entire families of inputs and behaviors to be tested, thus improving testing productivity. Cloud9 can handle not only single-threaded programs but also multi-threaded and dis...

  19. Awareness and use of the Heart Symbol by Finnish consumers.

    Science.gov (United States)

    Lahti-Koski, Marjaana; Helakorpi, Satu; Olli, Mari; Vartiainen, Erkki; Puska, Pekka

    2012-03-01

    To study the awareness of the Heart Symbol in different age and educational groups, and changes in the awareness over a 9-year period. In addition, the reported use of products with the symbol was examined. A series of annual cross-sectional postal surveys on Health Behaviour and Health among the Finnish Adult Population. A random sample (n 5000 per annum) from the Finnish population aged 15-64 years, drawn from the National Population Register, received a questionnaire. Men and women (n 29 378) participating in the surveys in 2000-2009. At the early 2000s, 48 % of men and 73 % of women reported to be familiar with the symbol. The corresponding rates were 66 % for men and 91 % for women in 2009. The reported use of products with the symbol increased from 29 % to 52 % in men and from 40 % to 72 % in women. In men, the awareness did not vary by age, whereas older women (45-64 years) were less likely to be aware of the symbol compared with younger women (25-34 years). Men and women with the highest education were best aware of the symbol and more likely to use the products in the early 2000s. The educational differences diminished or disappeared during the study period. The majority of Finnish adults are familiar with the Heart Symbol, and the reported use of such products increased in all age and educational groups, especially among the less educated. The symbol may work as an effective measure to diminish nutrition-related health inequalities.

  20. 40 CFR 89.303 - Symbols/abbreviations.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Symbols/abbreviations. 89.303 Section... Provisions § 89.303 Symbols/abbreviations. (a) The abbreviations in § 86.094-3 or part 89.3 of this chapter apply to this subpart. (b) The abbreviations in table 1 in appendix A of this subpart apply to this...

  1. 40 CFR 89.403 - Symbols/abbreviations.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Symbols/abbreviations. 89.403 Section... Procedures § 89.403 Symbols/abbreviations. (a) The abbreviations in § 86.094-3 or § 89.3 of this chapter apply to this subpart. (b) The abbreviations in Table 1 in appendix A to subpart D also apply to this...

  2. Subrepresentation semirings and an analog of 6j-symbols

    International Nuclear Information System (INIS)

    Kwon, Namhee; Sage, Daniel S.

    2008-01-01

    Let V be a complex representation of the compact group G. The subrepresentation semiring associated to V is the set of subrepresentations of the algebra of linear endomorphisms of V with operations induced by the matrix operations. The study of these semirings has been motivated by recent advances in materials science, in which the search for microstructure-independent exact relations for physical properties of composites has been reduced to the study of these semirings for the rotation group SO(3). In this case, the structure constants for subrepresentation semirings can be described explicitly in terms of the 6j-symbols familiar from the quantum theory of angular momentum. In this paper, we investigate subrepresentation semirings for the class of quasisimply reducible groups defined by Mackey ['Multiplicity free representations of finite groups', Pac. J. Math. 8, 503 (1958)]. We introduce a new class of symbols called twisted 6j-symbols for these groups, and we explicitly calculate the structure constants for subrepresentation semirings in terms of these symbols. Moreover, we show that these symbols satisfy analog of the standard properties of classical 6j-symbols

  3. Symbol manipulation and rule learning in spiking neuronal networks.

    Science.gov (United States)

    Fernando, Chrisantha

    2011-04-21

    It has been claimed that the productivity, systematicity and compositionality of human language and thought necessitate the existence of a physical symbol system (PSS) in the brain. Recent discoveries about temporal coding suggest a novel type of neuronal implementation of a physical symbol system. Furthermore, learning classifier systems provide a plausible algorithmic basis by which symbol re-write rules could be trained to undertake behaviors exhibiting systematicity and compositionality, using a kind of natural selection of re-write rules in the brain, We show how the core operation of a learning classifier system, namely, the replication with variation of symbol re-write rules, can be implemented using spike-time dependent plasticity based supervised learning. As a whole, the aim of this paper is to integrate an algorithmic and an implementation level description of a neuronal symbol system capable of sustaining systematic and compositional behaviors. Previously proposed neuronal implementations of symbolic representations are compared with this new proposal. Copyright © 2011 Elsevier Ltd. All rights reserved.

  4. Intelligent Sensing in Inverter-fed Induction Motors: Wavelet-based Symbolic Dynamic Analysis

    Directory of Open Access Journals (Sweden)

    Rohan SAMSI

    2008-07-01

    Full Text Available Wavelet transform allows adaptive usage of windows to extract pertinent information from sensor signals, and symbolic dynamic analysis provides coarse graining of the underlying information for enhanced computational speed and robustness of sensor-data-driven decision-making. These two concepts are synergistically combined for real-time intelligent sensing of faults whose signatures are small compared to coefficients of dominant frequencies in the signal. Feasibility of the proposed intelligent sensing method is demonstrated on an experimental apparatus for early detection of rotor bar breakage in an inverter-fed induction motor.

  5. Symbols for children’s tangible programming cubes: an explorative study

    CSIR Research Space (South Africa)

    Smith, Andrew C

    2009-06-01

    Full Text Available media, Proc. 7th international conference on intelligent user interfaces. [3] Cockburn, A. and Bryant, A. 1997. Leogo: An Equal Opportunity User Interface for Programming. Journal of Visual Languages and Computing 8(5-6):601-619. [4] Game... symbols instead of text. One research project which addresses some of these obstacles is GameBlocks [10]. GameBlocks is a physical programming environment aimed at young children. It makes use of physical syntax elements in the form of cubes...

  6. Dispersion Tolerance of 40 Gbaud Multilevel Modulation Formats with up to 3 bits per Symbol

    DEFF Research Database (Denmark)

    Jensen, Jesper Bevensee; Tokle, Torger; Geng, Yan

    2006-01-01

    We present numerical and experimental investigations of dispersion tolerance for multilevel phase- and amplitude modulation with up to 3 bits per symbol at a symbol rate of 40 Gbaud......We present numerical and experimental investigations of dispersion tolerance for multilevel phase- and amplitude modulation with up to 3 bits per symbol at a symbol rate of 40 Gbaud...

  7. 14 CFR 221.200 - Content and explanation of abbreviations, reference marks and symbols.

    Science.gov (United States)

    2010-01-01

    ..., reference marks and symbols. 221.200 Section 221.200 Aeronautics and Space OFFICE OF THE SECRETARY... § 221.200 Content and explanation of abbreviations, reference marks and symbols. (a) Content. The format..., reference marks and symbols. Abbreviations, reference marks and symbols which are used in the tariff shall...

  8. Revealing Cross-Frequency Causal Interactions During a Mental Arithmetic Task Through Symbolic Transfer Entropy: A Novel Vector-Quantization Approach.

    Science.gov (United States)

    Dimitriadis, Stavros; Sun, Yu; Laskaris, Nikolaos; Thakor, Nitish; Bezerianos, Anastasios

    2016-10-01

    Working memory (WM) is a distributed cognitive process that employs communication between prefrontal cortex and posterior brain regions in the form of cross-frequency coupling between theta ( θ) and high-alpha ( α2) brain waves. A novel method for deriving causal interactions between brain waves of different frequencies is essential for a better understanding of the neural dynamics of such complex cognitive process. Here, we proposed a novel method to estimate transfer entropy ( TE) through a symbolization scheme, which is based on neural-gas algorithm (NG) and encodes a bivariate time series in the form of two symbolic sequences. Given the symbolic sequences, the delay symbolic transfer entropy ( dSTE NG ) is defined. Our approach is akin to standard symbolic transfer entropy ( STE) that incorporates the ordinal pattern (OP) symbolization technique. We assessed the proposed method in a WM-invoked paradigm that included a mental arithmetic task at various levels of difficulty. Effective interactions between Frontal θ ( F θ ) and [Formula: see text] ( PO α2 ) brain waves were detected in multichannel EEG recordings from 16 subjects. Compared with conventional methods, our technique was less sensitive to noise and demonstrated improved computational efficiency in quantifying the dominating direction of effective connectivity between brain waves of different spectral content. Moreover, we discovered an efferent F θ connectivity pattern and an afferent PO α2 one, in all the levels of the task. Further statistical analysis revealed an increasing dSTE NG strength following the task's difficulty.

  9. The symbolism of Mesopotamian cult images

    Directory of Open Access Journals (Sweden)

    Helmer Ringgren

    1979-01-01

    Full Text Available Is. 44: 12-20 contains a satirical description of the way the pagans, i.e., the Babylonians, make their "gods", i.e., their idols. "The ironsmith fashions it and works it over the coals; he shapes it with hammers, and forges it with his strong arm ... The carpenter stretches a line, he marks it out with a pencil; he fashions it with planes, and marks it with a compass; he shapes it into the figure of a man, with the beauty of a man, to dwell in a house. He cuts down cedars, he plants holm trees and oaks and lets them grow. Some he uses for fuel to warm himself or to bake bread, of others "he makes a god and worships it. With these and similar words the prophet ridicules those who make cult images. This might of course be an independent literary creation—and perhaps it is—but interestingly enough there is a Babylonian text that could well have served as the prophet's model. In a ritual for the akitu festival in Babylon from Seleucid times we read about the third day as follows: "When it is three hours after sunrise, he shall call a metalworker and give him precious stones and gold from the treasury of the god Marduk to make two images for (the ceremonies of the sixth day. He shall call a woodworker and give him (some cedar and tamarisk (pieces. He shall call a goldsmith and give him (some gold." It is obvious that the images in question are not cult images in a real sense, i.e., images to be set up in a temple to receive sacrifices and worship, but images intended to be used in a "magical" ceremony: they represent evil forces that shall be annihilated by means of destroying their images in fire. At the same time, the text shows that it was well known how these images were made, but also that this did not detract from their symbolic, or magical, value.

  10. On the Babylonian Origin of Symbolic Logic

    Directory of Open Access Journals (Sweden)

    Schumann Andrew

    2017-06-01

    Full Text Available The logical reasoning first appeared within the Babylonian legal tradition established by the Sumerians in the law codes which were first over the world: Ur-Nammu (ca. 2047 – 2030 B.C.; Lipit-Ishtar (ca. 1900 – 1850 B.C., and later by their successors, the Akkadians: Hammurabi (1728 – 1686 B.C.. In these codes the casuistic law formulation began first to be used: “If/when (Akkadian: šumma this or that occurs, this or that must be done” allowed the Akkadians to build up a theory of logical connectives: “... or…”, “… and…”, “if…, then…”, “not…” that must have been applied in their jurisprudence. So, a trial decision looked like an inference by modus pones and modus tollens or by other logical rules from (i some facts and (ii an appropriate article in the law code represented by an ever true implication. The law code was announced by erecting a stele with the code or by engraving the code on a stone wall. It was considered a set of axioms announced for all. Then the trial decisions are regarded as claims logically inferred from the law code on the stones. The only law code of the Greeks that was excavated is the Code of Gortyn (Crete, the 5th century B.C.. It is so similar to the Babylonian codes by its law formulations; therefore, we can suppose that the Greeks developed their codes under a direct influence of the Semitic legal tradition: the code was represented as the words of the stele and the court was a logic application from these words. In this way the Greek logic was established within a Babylonian legal tradition, as well. Hence, we can conclude that, first, logic appeared in Babylonia and, second, it appeared within a unique legal tradition where all trial decisions must have been transparent, obvious, and provable. The symbolic logic appeared first not in Greece, but in Mesopotamia and this tradition was grounded in the Sumerian/Akkadian jurisprudence.

  11. The effects of sign design features on bicycle pictorial symbols for bicycling facility signs.

    Science.gov (United States)

    Oh, Kyunghui; Rogoff, Aaron; Smith-Jackson, Tonya

    2013-11-01

    The inanimate bicycle symbol has long been used to indicate the animate activity of bicycling facility signs. In contrast, either the inanimate bicycle symbol or the animate bicycle symbol has been used interchangeably for the standard pavement symbols in bike lanes. This has led to confusion among pedestrians and cyclists alike. The purpose of this study was to examine two different designs (inanimate symbol vs. animate symbol) involved in the evaluation of perceived preference and glance legibility, and investigate sign design features on bicycle pictorial symbols. Thirty-five participants compared current bicycle signs (inanimate symbols) to alternative designs (animate symbols) in a controlled laboratory setting. The results indicated that the alternative designs (animate symbols) showed better performance in both preference and glance legibility tests. Conceptual compatibility, familiarity, and perceptual affordances were found to be important factors as well. Copyright © 2013 Elsevier Ltd and The Ergonomics Society. All rights reserved.

  12. Extending OFDM Symbols to Reduce Power Consumption

    NARCIS (Netherlands)

    Kokkeler, Andre B.J.; Smit, Gerardus Johannes Maria

    2012-01-01

    Existing communication standards have limited capabilities to adapt to low SNR environments or to exploit low data rate requirements in a power efficient way. Existing techniques like e.g. control coding do not reduce the computational load when reducing data rates. In this paper, we introduce

  13. Artificial bee colony in neuro - Symbolic integration

    Science.gov (United States)

    Kasihmuddin, Mohd Shareduwan Mohd; Sathasivam, Saratha; Mansor, Mohd. Asyraf

    2017-08-01

    Swarm intelligence is a research area that models the population of the swarm based on natural computation. Artificial bee colony (ABC) algorithm is a swarm based metaheuristic algorithm introduced by Karaboga to optimize numerical problem. Pattern-SAT is a pattern reconstruction paradigm that utilized 2SAT logical rule in representing the behavior of the desired pattern. The information of the desired pattern in terms of 2SAT logic is embedded to Hopfield neural network (HNN-P2SAT) and the desired pattern is reconstructed during the retrieval phase. Since the performance of HNN-P2SAT in Pattern-SAT deteriorates when the number of 2SAT clause increased, newly improved ABC is used to reduce the computation burden during the learning phase of HNN-P2SAT (HNN-P2SATABC). The aim of this study is to investigate the performance of Pattern-SAT produced by ABC incorporated with HNN-P2SAT and compare it with conventional standalone HNN. The comparison is examined by using Microsoft Visual Basic C++ 2013 software. The detailed comparison in doing Pattern-SAT is discussed based on global Pattern-SAT, ratio of activated clauses and computation time. The result obtained from computer simulation indicates the beneficial features of HNN-P2SATABC in doing Pattern-SAT. This finding is expected to result in a significant implication on the choice of searching method used to do Pattern-SAT.

  14. The Symbol Grounding Problem Revisited: A Thorough Evaluation of the ANS Mapping Account and the Proposal of an Alternative Account Based on Symbol–Symbol Associations

    Science.gov (United States)

    Reynvoet, Bert; Sasanguie, Delphine

    2016-01-01

    Recently, a lot of studies in the domain of numerical cognition have been published demonstrating a robust association between numerical symbol processing and individual differences in mathematics achievement. Because numerical symbols are so important for mathematics achievement, many researchers want to provide an answer on the ‘symbol grounding problem,’ i.e., how does a symbol acquires its numerical meaning? The most popular account, the approximate number system (ANS) mapping account, assumes that a symbol acquires its numerical meaning by being mapped on a non-verbal and ANS. Here, we critically evaluate four arguments that are supposed to support this account, i.e., (1) there is an evolutionary system for approximate number processing, (2) non-symbolic and symbolic number processing show the same behavioral effects, (3) non-symbolic and symbolic numbers activate the same brain regions which are also involved in more advanced calculation and (4) non-symbolic comparison is related to the performance on symbolic mathematics achievement tasks. Based on this evaluation, we conclude that all of these arguments and consequently also the mapping account are questionable. Next we explored less popular alternative, where small numerical symbols are initially mapped on a precise representation and then, in combination with increasing knowledge of the counting list result in an independent and exact symbolic system based on order relations between symbols. We evaluate this account by reviewing evidence on order judgment tasks following the same four arguments. Although further research is necessary, the available evidence so far suggests that this symbol–symbol association account should be considered as a worthy alternative of how symbols acquire their meaning. PMID:27790179

  15. Effects of animation on naming and identification across two graphic symbol sets representing verbs and prepositions.

    Science.gov (United States)

    Schlosser, Ralf W; Koul, Rajinder; Shane, Howard; Sorce, James; Brock, Kristofer; Harmon, Ashley; Moerlein, Dorothy; Hearn, Emilia

    2014-10-01

    The effects of animation on naming and identification of graphic symbols for verbs and prepositions were studied in 2 graphic symbol sets in preschoolers. Using a 2 × 2 × 2 × 3 completely randomized block design, preschoolers across three age groups were randomly assigned to combinations of symbol set (Autism Language Program [ALP] Animated Graphics or Picture Communication Symbols [PCS]), symbol format (animated or static), and word class (verbs or prepositions). Children were asked to name symbols and to identify a target symbol from an array given the spoken label. Animated symbols were more readily named than static symbols, although this was more pronounced for verbs than for prepositions. ALP symbols were named more accurately than PCS in particular with prepositions. Animation did not facilitate identification. ALP symbols for prepositions were identified better than PCS, but there was no difference for verbs. Finally, older children guessed and identified symbols more effectively than younger children. Animation improves the naming of graphic symbols for verbs. For prepositions, ALP symbols are named more accurately and are more readily identifiable than PCS. Naming and identifying symbols are learned skills that develop over time. Limitations and future research directions are discussed.

  16. Developmental change in children's sensitivity to sound symbolism.

    Science.gov (United States)

    Tzeng, Christina Y; Nygaard, Lynne C; Namy, Laura L

    2017-08-01

    The current study examined developmental change in children's sensitivity to sound symbolism. Three-, five-, and seven-year-old children heard sound symbolic novel words and foreign words meaning round and pointy and chose which of two pictures (one round and one pointy) best corresponded to each word they heard. Task performance varied as a function of both word type and age group such that accuracy was greater for novel words than for foreign words, and task performance increased with age for both word types. For novel words, children in all age groups reliably chose the correct corresponding picture. For foreign words, 3-year-olds showed chance performance, whereas 5- and 7-year-olds showed reliably above-chance performance. Results suggest increased sensitivity to sound symbolic cues with development and imply that although sensitivity to sound symbolism may be available early and facilitate children's word-referent mappings, sensitivity to subtler sound symbolic cues requires greater language experience. Copyright © 2017 Elsevier Inc. All rights reserved.

  17. Associations of non-symbolic and symbolic numerical magnitude processing with mathematical competence: a meta-analysis.

    Science.gov (United States)

    Schneider, Michael; Beeres, Kassandra; Coban, Leyla; Merz, Simon; Susan Schmidt, S; Stricker, Johannes; De Smedt, Bert

    2017-05-01

    Many studies have investigated the association between numerical magnitude processing skills, as assessed by the numerical magnitude comparison task, and broader mathematical competence, e.g. counting, arithmetic, or algebra. Most correlations were positive but varied considerably in their strengths. It remains unclear whether and to what extent the strength of these associations differs systematically between non-symbolic and symbolic magnitude comparison tasks and whether age, magnitude comparison measures or mathematical competence measures are additional moderators. We investigated these questions by means of a meta-analysis. The literature search yielded 45 articles reporting 284 effect sizes found with 17,201 participants. Effect sizes were combined by means of a two-level random-effects regression model. The effect size was significantly higher for the symbolic (r = .302, 95% CI [.243, .361]) than for the non-symbolic (r = .241, 95% CI [.198, .284]) magnitude comparison task and decreased very slightly with age. The correlation was higher for solution rates and Weber fractions than for alternative measures of comparison proficiency. It was higher for mathematical competencies that rely more heavily on the processing of magnitudes (i.e. mental arithmetic and early mathematical abilities) than for others. The results support the view that magnitude processing is reliably associated with mathematical competence over the lifespan in a wide range of tasks, measures and mathematical subdomains. The association is stronger for symbolic than for non-symbolic numerical magnitude processing. So symbolic magnitude processing might be a more eligible candidate to be targeted by diagnostic screening instruments and interventions for school-aged children and for adults. © 2016 John Wiley & Sons Ltd.

  18. Architectural Symbols of a City - Case Study

    Science.gov (United States)

    Poplatek, Jacek

    2017-10-01

    constituted (or constitute at present) important landmarks in the urban area, and which were (or still are) the city symbols, have been analysed. Unfortunately, some of the buildings constructed over the last 25 years in the representative part of the city are not consistent with its unique character. The decisions made by investors, architects, city authorities and the monument preservation office may have serious negative effects; they may cause degradation of urban space and, as a result, harm its image. In the summary of this paper possible dangers connected with realising investments in the most important city locations, the ones with historic context, have been indicated, and recommendations aimed at elimination of such dangers have been presented. The priority - particularly in cities with an established, unique image - should be to ensure that architectural and cultural heritage is preserved, while new architecture should speak with modern language and introduce new values to its historic surroundings.

  19. Discrimination symbol applying method for sintered nuclear fuel product

    International Nuclear Information System (INIS)

    Ishizaki, Jin

    1998-01-01

    The present invention provides a symbol applying method for applying discrimination information such as an enrichment degree on the end face of a sintered nuclear product. Namely, discrimination symbols of information of powders are applied by a sintering aid to the end face of a molded member formed by molding nuclear fuel powders under pressure. Then, the molded product is sintered. The sintering aid comprises aluminum oxide, a mixture of aluminum oxide and silicon dioxide, aluminum hydride or aluminum stearate alone or in admixture. As an applying means of the sintering aid, discrimination symbols of information of powders are drawn by an isostearic acid on the end face of the molded product, and the sintering aid is sprayed thereto, or the sintering aid is applied directly, or the sintering aid is suspended in isostearic acid, and the suspension is applied with a brush. As a result, visible discrimination information can be applied to the sintered member easily. (N.H.)

  20. Presumed symbolic use of diurnal raptors by Neanderthals.

    Directory of Open Access Journals (Sweden)

    Eugène Morin

    Full Text Available In Africa and western Eurasia, occurrences of burials and utilized ocher fragments during the late Middle and early Late Pleistocene are often considered evidence for the emergence of symbolically-mediated behavior. Perhaps less controversial for the study of human cognitive evolution are finds of marine shell beads and complex designs on organic and mineral artifacts in early modern human (EMH assemblages conservatively dated to ≈ 100-60 kilo-years (ka ago. Here we show that, in France, Neanderthals used skeletal parts of large diurnal raptors presumably for symbolic purposes at Combe-Grenal in a layer dated to marine isotope stage (MIS 5b (≈ 90 ka and at Les Fieux in stratigraphic units dated to the early/middle phase of MIS 3 (60-40 ka. The presence of similar objects in other Middle Paleolithic contexts in France and Italy suggest that raptors were used as means of symbolic expression by Neanderthals in these regions.

  1. Symbol-value association and discrimination in the archerfish.

    Science.gov (United States)

    Karoubi, Naomi; Leibovich, Tali; Segev, Ronen

    2017-01-01

    One of the most important aspects of mathematical cognition in humans is the ability to symbolically represent magnitudes and quantities. In the last 20 years it has been shown that not only humans but also other primates, birds and dolphins can use symbolic representation of quantities. However, it remains unclear to what extent this ability is spread across the animal kingdom. Here, by training archerfish to associate variable amounts of rewards with different geometric shapes, we show for the first time that lower vertebrates can also associate a value with a symbol and make a decision that maximizes their food intake based on this information. In addition, the archerfish is able to understand up to four different quantities and organize them mentally in an ordinal manner, similar to observations in higher vertebrates. These findings point in the direction of the existence of an approximate magnitude system in fish.

  2. Emotional sound symbolism: Languages rapidly signal valence via phonemes.

    Science.gov (United States)

    Adelman, James S; Estes, Zachary; Cossu, Martina

    2018-03-03

    Rapidly communicating the emotional valence of stimuli (i.e., negativity or positivity) is vital for averting dangers and acquiring rewards. We therefore hypothesized that human languages signal emotions via individual phonemes (emotional sound symbolism), and more specifically that the phonemes at the beginning of the word signal its valence, as this would maximize the receiver's time to respond adaptively. Analyzing approximately 37,000 words across five different languages (English, Spanish, Dutch, German, and Polish), we found emotional sound symbolism in all five languages, and within each language the first phoneme of a word predicted its valence better than subsequent phonemes. Moreover, given that averting danger is more urgent than acquiring rewards, we further hypothesized and demonstrated that phonemes that are uttered most rapidly tend to convey negativity rather than positivity. Thus, emotional sound symbolism is an adaptation providing an early warning system in human languages, analogous to other species' alarm calls. Copyright © 2018 Elsevier B.V. All rights reserved.

  3. Tree Symbolism and Conservation in the South Pare Mountains, Tanzania

    Directory of Open Access Journals (Sweden)

    Pauline von Hellermann

    2016-01-01

    Full Text Available This paper explores the trees that shape the Pare landscape in Tanzania, and the multiple meanings attached to them by local people. Three main groups of 'symbolic' trees are identified. First, indigenous trees that constitute hundreds of sacred groves dotted across the landscape symbolising communal identity, history, and belonging. Second, fast growing exotic species such as eucalyptus and grevillea, planted in a series of colonial and postcolonial initiatives, symbolising not only progress, modern land management and environmental improvement, but also wealth and landownership. Finally, (largely exotic fruit trees and (largely indigenous trees used for fertilisiling farms, signifying good homes and farms. The paper describes how these three types of tree symbolism embody different ways of relating to place and conservation practices, and discusses the insights a pluralistic understanding of such symbolism offers for conservation policy in this region.

  4. Preference transitivity and symbolic representation in capuchin monkeys (Cebus apella.

    Directory of Open Access Journals (Sweden)

    Elsa Addessi

    Full Text Available BACKGROUND: Can non-human animals comprehend and employ symbols? The most convincing empirical evidence comes from language-trained apes, but little is known about this ability in monkeys. Tokens can be regarded as symbols since they are inherently non-valuable objects that acquire an arbitrarily assigned value upon exchange with an experimenter. Recent evidence suggested that capuchin monkeys, which diverged from the human lineage 35 million years ago, can estimate, represent and combine token quantities. A fundamental and open question is whether monkeys can reason about symbols in ways similar to how they reason about real objects. METHODOLOGY/PRINCIPAL FINDINGS: Here we examined this broad question in the context of economic choice behavior. Specifically, we assessed whether, in a symbolic context, capuchins' preferences satisfy transitivity--a fundamental trait of rational decision-making. Given three options A, B and C, transitivity holds true if A > or = B, B > or = C and A > or = C (where > or = indicates preference. In this study, we trained monkeys to exchange three types of tokens for three different foods. We then compared choices monkeys made between different types of tokens with choices monkeys made between the foods. Qualitatively, capuchins' preferences revealed by the way of tokens were similar to those measured with the actual foods. In particular, when choosing between tokens, monkeys displayed strict economic preferences and their choices satisfied transitivity. Quantitatively, however, values measured by the way of tokens differed systematically from those measured with the actual foods. In particular, for any pair of foods, the relative value of the preferred food increased when monkeys chose between the corresponding tokens. CONCLUSIONS/SIGNIFICANCE: These results indicate that indeed capuchins are capable of treating tokens as symbols. However, as they do so, capuchins experience the cognitive burdens imposed by symbolic

  5. THE “TREE OF LIFE” SYMBOL IN JEWELLERY

    Directory of Open Access Journals (Sweden)

    TEODOR-STANCIU Silviu

    2017-05-01

    Full Text Available History and tradition play a very important role in the development of a society. Designed objects were and are adorned with signs and symbols holding various messages and aesthetic particularities. These objects have the ability of spreading emotions through their shape, material, finishing or graphic and are made using different materials, techniques and technologies. By particularising a sign one must take into account its orientation towards certain objects regarding the significance, the culture and the historical period. The sacred geometry, a sum of shapes with religious and cultural values, can be analysed from a scientific, philosophical, aesthetic and mystic point of view. The origin, the nature and the relationship between these shapes are considered to be determined by the surrounding universe. The symbol is an intermediary which favours the communication from the visible reality to the invisible, non-figurative one. One of the shapes with a symbol value, frequently used, is the tree of life. The tree of life is a symbol dating from the Neolithic, but still applied nowadays. Bearing information and witness of the history of a civilisation, the “Tree of life” symbol inspired the artisans and artists from different cultures, being graphically readapted, both due to the technology development, as well as to the society’s maturation. The present paper presents the evolution of the “tree of life” sign, the manner in which it followed the history and civilisation flow, the diversity of objects adorned with it through various working techniques, as well as its evolution through new interpretations in the jewellery design applications. The paper presents the experiment of making a silver pendant with the “Tree of life” symbol, reinterpreted and made using a 3D program.

  6. Symbolic interactionism and critical perspective: divergent or synergistic?

    Science.gov (United States)

    Burbank, Patricia M; Martins, Diane C

    2010-01-01

    Throughout their history, symbolic interactionism and critical perspective have been viewed as divergent theoretical perspectives with different philosophical underpinnings. A review of their historical and philosophical origins reveals both points of divergence and areas of convergence. Their underlying philosophies of science and views of human freedom are different as is their level of focus with symbolic interactionism having a micro perspective and critical perspective using a macro perspective. This micro/macro difference is reflected in the divergence of their major concepts, goals and basic tenets. While their underlying philosophies are different, however, they are not necessarily contradictory and areas of convergence may include the concepts of reference groups and looking glass self within symbolic interactionism and ideological hegemony within critical perspective. By using a pragmatic approach and combining symbolic interactionism and critical perspectives, both micro and macro levels come into focus and strategies for change across individual and societal levels can be developed and applied. Application of both symbolic interactionism and critical perspective to nursing research and scholarship offers exciting new opportunities for theory development and research methodologies. In nursing education, these two perspectives can give students added insight into patients' and families' problems at the micro level while, at the same time, giving them a lens to see and tools to apply to problems at the macro level in health care. In nursing practice, a combined symbolic interactionism/critical perspective approach assists nurses to give high-quality care at the individual level while also working at the macro level to address the manufacturers of illness. New research questions emerge from this combination of perspectives with new possibilities for theory development, a transformation in nursing education, and the potential for new practice strategies that

  7. Simulations of Stagewise Development with a Symbolic Architecture

    Science.gov (United States)

    Gobet, Fernand

    This chapter compares Piaget's theory of development with Feigenbaum & Simon's (1962; 1984) EPAM theory. An attempt is made to map the concepts of assimilation and accommodation in Piaget's theory onto the concepts of familiarisation and accommodation in EPAM. An EPAM-like model of the balance scale task is then presented, with a discussion of preliminary results showing how it accounts for children's discontinuous, stage-like development. The analysis focuses on the transition between rules, using catastrophe flags (Gilmore, 1981) as criteria. It is argued that some symbolic models may be described as dynamical systems, in the same way as some non-symbolic models.

  8. [Determining visual acuity with LH symbols and Landolt rings].

    Science.gov (United States)

    Gräf, M; Becker, R

    1999-08-01

    Lea (LH) symbols seem to be favourable for visual acuity assessment in childhood. The symbols of the LH test are well standardized and applicable to preschool children. We compared the visual acuity determined by LH single symbols (LH) and the acuity measured with the Landolt-C (LC). 138 cooperative subjects aged 7 to 91 years were examined. Their visual acuity was either normal or reduced due to various etiologies. Their refractive error was corrected. The monocular LH and LC were determined by a 3/4 criterion (study 1). In 19 healthy subjects aged 21 to 58 years, acuity was reduced stepwise by 5 different calibrated occlusives (study 2). A Lighthouse single symbol book (LH symbols) was used at a distance of 3 m. LC was determined at a distance of 5 m. The luminance of the test field was 180-200 cd/m2. The right eye of each patient and the amblyopic eye of the squinting patients was taken for statistical evaluation. The strabismic patients' interocular differences of LC and LH were compared. Within study 1, LC ranged from 0.02 to 2.0 and LH from 0.03 to 2.5. LH overestimated LC by 1.4 lines on an average (t-test p 1 line, 85.7% resp. 90% of the strabismic amblyopic patients with an interocular LC difference > 1 resp > 2 lines were detected. In study 2, LC ranged from 0.1 to 1.6, LH from 0.12 to 2.0. The mean difference LH-LC was 1.3 lines. The regression equation was lgLH = 0.91 lgLC + 0.08 (r = 0.95). LH symbols allow a reliable measurement of recognition acuity. Due to the design of the symbols, they are excellently suitable for application to preschool children. Age related normal values should be established. The systematic difference between the LC acuity and the LH acuity measured with the Lighthouse LH single symbol book by 1.4 lines has to be considered.

  9. The dark side of ISO 14001: The symbolic environmental behavior

    Directory of Open Access Journals (Sweden)

    Vera Ferrón Vílchez

    2017-01-01

    Full Text Available Some of the academic research on ISO 14001 has focused on analyzing the benefits of its adoption. However, this international standard has also received some criticism, particularly in respect of the adoption of ISO 14001 when not accompanied by significant improvements in environmental performance. This study analyzes the relationship between the symbolic environmental behavior and the adoption of ISO 14001. In so doing, it uses binary logistic regression to analyze an international sample of 1961 manufacturing facilities that each employs more than 50 people. The results indicate that the higher the symbolic environmental performance of the firm, the greater the probability of adopting ISO 14001.

  10. Appendices on provisional nomenclature, symbols, terminology and conventions - number 55

    International Nuclear Information System (INIS)

    1976-01-01

    Ten numerically-based syllables (nil, un, bi, etc) are used to provide recommended names of elements of atomic numbers greater than 100. The symbol of the element is composed of the initial letters of the numerical roots which make up the name. Abbreviated forms of the names of elements 101 to 199 are proposed. Thus: element 105 would be named Un-nil-pentium [hyphens not part of name but shown in the recommendatoins to assist comprehension], symbol Unp, abbreviation Pentium. (U.K.)

  11. Kongehuset som varemærke og nationalt symbol

    DEFF Research Database (Denmark)

    Ravn Sørensen, Anders

    2016-01-01

    Kongehuset er ikke bare et nationalt symbol. Det er også et varemærke, som der er al mulig grund til at beskytte og vogte nidkært over. Kronen har nemlig god brandmæssig værdi.......Kongehuset er ikke bare et nationalt symbol. Det er også et varemærke, som der er al mulig grund til at beskytte og vogte nidkært over. Kronen har nemlig god brandmæssig værdi....

  12. The Symbolic Dimension of Gender Violence: an introductory discussion

    Directory of Open Access Journals (Sweden)

    Romeu Gomes

    2008-11-01

    Full Text Available The aim of this article is to support a positive campaign against gender violence, or violence against women, by offering an introductory account of its symbolism. First, I set out the case for taking gender and masculinity to be the keys to understanding the symbolism of violence in the conetxt of gender relations. I then use that analysis to bring into focus those cases of violence which are otherwise hidden or unrecognised. Lastly, I offer suggestions as to how the debate may be continued.

  13. Hidden Identification on Parts: Magnetic Machine-Readable Matrix Symbols

    Science.gov (United States)

    Schramm, Harry F.; Jones, Clyde S.; Roxby, Donald L.; Teed, James D.; Shih, William C. L.; Fitzpatrick, Gerald L.; Knisely, Craig

    2005-01-01

    All NASA parts have identification, usually expressed in terms of part number, serial number, and the like. In most cases, this identification is permanently marked directly on the part for tracking throughout its life cycle. NASA has developed a method for reading the matrix symbol through up to 15 mils (25 m) of paint (5 or 6 layers). This method of part identification involves coating selected patches on the objects with magnetic materials in matrix symbol patterns and reading the patterns by use of magneto-optical imaging equipment.

  14. Quantitative characterisation of audio data by ordinal symbolic dynamics

    Science.gov (United States)

    Aschenbrenner, T.; Monetti, R.; Amigó, J. M.; Bunk, W.

    2013-06-01

    Ordinal symbolic dynamics has developed into a valuable method to describe complex systems. Recently, using the concept of transcripts, the coupling behaviour of systems was assessed, combining the properties of the symmetric group with information theoretic ideas. In this contribution, methods from the field of ordinal symbolic dynamics are applied to the characterisation of audio data. Coupling complexity between frequency bands of solo violin music, as a fingerprint of the instrument, is used for classification purposes within a support vector machine scheme. Our results suggest that coupling complexity is able to capture essential characteristics, sufficient to distinguish among different violins.

  15. Effects of background color and symbol arrangement cues on construction of multi-symbol messages by young children without disabilities: implications for aided AAC design.

    Science.gov (United States)

    Thistle, Jennifer J; Wilkinson, Krista

    2017-09-01

    Children whose speech does not meet their communication needs often benefit from augmentative and alternative communication (AAC). The design of an AAC display may influence the child's ability to communicate effectively. The current study examined how symbol background color cues and symbol arrangement affected construction of multi-symbol messages using line-drawing symbols, by young children with typical development. Participants (N = 52) heard a spoken phrase matching a photograph and selected line drawings within a 4 × 4 array. Friedman two-way ANOVAs evaluated speed and accuracy of multi-symbol message construction under four conditions in which the background color and arrangement of symbols was manipulated. Participants demonstrated significantly faster response times when symbols were arranged by word-class category compared to no symbol arrangement. The majority of children responded faster when symbols had white backgrounds, but this effect failed to reach statistical significance. This study provides preliminary evidence suggesting the importance of symbol arrangement for young children. The findings highlight the need for caution when incorporating background color on displays for young children. Future research is needed to examine the effect of visual cues on children who use AAC and consider additional factors that could influence efficacy of symbol arrangement and background color use.

  16. [Symbol-based communication in non-human primates: a C. S. Peirce's semiotic analysis].

    Science.gov (United States)

    Queiroz, João

    2003-12-01

    Are (or were) there any other symbolic species? This question has been addressed by researchers from many different fields and is responsible for a historical controversy on the existence of a threshold between "symbolic creatures" vs "simple forms of language creatures". According to the mainstream ethology and comparative psychology only the Homo sapiens is cognitively equiped to produce and interpret symbols. Here, I introduce an empirically testable model of symbolic semiosis ("symbolic action of sign") supported by C.S.Peirce logical-phenomenological theory of categories. I suggest that a specific sign-user pattern of behavior, observed in non-human primate communication, indicate a transition from indexical to symbolic semiosis.

  17. A novel framework on exact average symbol error probabilities of multihop transmission over amplify-and-forward relay fading channels

    KAUST Repository

    Yilmaz, Ferkan

    2010-09-01

    In this paper, we propose an analytical framework on the exact computation of the average symbol error probabilities (ASEP) of multihop transmission over generalized fading channels when an arbitrary number of amplify-and-forward relays is used. Our approach relies on moment generating function (MGF) framework to obtain exact single integral expressions which can be easily computed by Gauss-Chebyshev Quadrature (GCQ) rule. As such, the derived results are a convenient tool to analyze the ASEP performance of multihop transmission over amplify-and-forward relay fading channels. Numerical and simulation results, performed to verify the correctness of the proposed formulation, are in perfect agreement. © 2010 IEEE.

  18. Visual Language of World War I Propaganda on a Symbolical Plane: How a Visual Symbol is Created

    Directory of Open Access Journals (Sweden)

    Boris Petrović

    2016-10-01

    Full Text Available This work seeks to explore how certain symbols, built over time within a certain cultural context (in this case, said context being the one of western European culture, are re-contextualized within a given situation (World War I to better serve the means of propaganda. How can a visual representation of a certain symbol, thousands of years old and deeply rooted in cultural heritage, be repurposed and reshaped within months? Also, the article aims to explore the connection between the visual cannon of Orthodox icons and World War I propaganda posters.

  19. Situation awareness for UAV equipped with image/video understanding system based on network-symbolic models

    Science.gov (United States)

    Kuvich, Gary

    2004-09-01

    Situation awareness is an important factor in the effectiveness of aerial missions. One of the major problems with the UAV is that human operators lack situation awareness. Limited bandwidth does not allow telepresence to a degree, which gives the same level of situation awareness that pilots of regular airplanes have. The best solution would be to equip UAV with a "situation awareness" system that in the real time provides operators with the information necessary for effective mission control and decision making, and allows effective supervisory control of the UAV. Vision in advanced creatures is a component of situation awareness, navigation and planning systems. Fast information processing and decision making requires reduction of informational and computational complexities. The brain achieves this goal using implicit symbolic coding, hierarchical compression, and selective processing of visual information. The Network-Symbolic representation, in which both systematic structural/logical methods and neural/statistical methods are the parts of a single mechanism, converts visual information into relational Network-Symbolic knowledge models, effectively resolving ambiguity and uncertainty in the visual information, and avoiding artificial precise computations of 3-dimensional models. The UAV equipped with such smart vision, will have a situation awareness system that gives operators better control over aircraft and significantly improves surveillance and reconnaissance capabilities.

  20. CAAD as Computer-Activated Architectural Design

    DEFF Research Database (Denmark)

    Galle, Per

    1998-01-01

    . On this background two alternative roles of computers in computer-aided architectural design (CAAD) are distinguished: a passive and a more active role, where in the latter case, the computer’s capacity for symbol manipulation is utilized to influence design thinking actively. The analysis offered in this paper may...