WorldWideScience

Sample records for exploring topological relationships

  1. Exploring topological phases with quantum walks

    International Nuclear Information System (INIS)

    Kitagawa, Takuya; Rudner, Mark S.; Berg, Erez; Demler, Eugene

    2010-01-01

    The quantum walk was originally proposed as a quantum-mechanical analog of the classical random walk, and has since become a powerful tool in quantum information science. In this paper, we show that discrete-time quantum walks provide a versatile platform for studying topological phases, which are currently the subject of intense theoretical and experimental investigations. In particular, we demonstrate that recent experimental realizations of quantum walks with cold atoms, photons, and ions simulate a nontrivial one-dimensional topological phase. With simple modifications, the quantum walk can be engineered to realize all of the topological phases, which have been classified in one and two dimensions. We further discuss the existence of robust edge modes at phase boundaries, which provide experimental signatures for the nontrivial topological character of the system.

  2. Exploring the multiverse with topological defects

    Science.gov (United States)

    Zhang, Jun

    Inflationary cosmology suggests a nontrivial spacetime structure on scales beyond our observable universe, the multiverse. Based on the observation that topological defects and vacuum bubbles can spontaneously nucleate in a de Sitter like inflating space, we explore two different aspects of the multiverse model in this thesis. Hence the main body of this study consists of two parts. In the first part, we investigate domain walls and cosmic strings that may nucleate in the false vacuum. If we live in a bubble universe surrounded by the false vacuum, as suggested by the eternal inflationary multiverse model, the nucleating defects could collide with our bubble universe, and leave potentially observable signals. We investigate different kinds of collisions and their consequences. We suggest such collisions generically result in signals such as radiation and gravitational waves or the defects themselves or a combination of both propagating into our bubble, and therefore provide a new approach to searching for the multiverse. In the second part, we study the fate of domain walls and vacuum bubbles that could nucleate in the slow roll inflation. We show that, depending on their sizes, these objects will form either black holes or wormholes after inflation. We study the spacetime structure of the resulting wormholes. Our analysis indicates the presence of domain walls and vacuum bubbles in the slow roll inflation has significant effects on the global structure of our universe, that is by forming wormholes, it can lead to the picture of a multiverse. We also calculate the mass spectrum of the resulting black holes and wormholes under certain assumptions. We argue that the observation of a population of black holes with such mass spectrum could be considered as evidence of the existence of both inflation and multiverse.

  3. Explorations in topology map coloring, surfaces and knots

    CERN Document Server

    Gay, David

    2013-01-01

    Explorations in Topology, Second Edition, provides students a rich experience with low-dimensional topology (map coloring, surfaces, and knots), enhances their geometrical and topological intuition, empowers them with new approaches to solving problems, and provides them with experiences that will help them make sense of future, more formal topology courses. The book's innovative story-line style models the problem-solving process, presents the development of concepts in a natural way, and engages students in meaningful encounters with the material. The updated end-of-chapter investigation

  4. Exploring Entrepreneurial Network Relationships

    OpenAIRE

    Norus, Jesper

    2004-01-01

    In the recent years the successful collaborative arrangements and relationships between university, industry and public institutions have become a mantra in transforming new scientific knowledge into new innovations and business ventures. The fit between these very different actor groups has been treated as a contingent factor. However only little attention have been giving to a specific focus on the strategies that new business ventures have obtained to establish the fit between small firms,...

  5. Exploring Entrepreneurial Network Relationships

    DEFF Research Database (Denmark)

    Norus, Jesper

    2003-01-01

    explores four different strategies for dealing with network relations; the research oriented strategy, the incubator strategy, the industrial partnering strategy, and the policy-oriented strategy. The research-oriented strategy is narrowly focusing on how a biotechnology firm transforms their scientific...... treated as a contingent factor. However only little attention have been giving to a specific focus on the strategies that new business ventures have obtained to establish the fit between small firms, university research, and public policies such as regulatory policies and R&D policies. The emergence...... results into promising technologies, services or products. The incubator strategy is concerned with localization and how to come about specific types of managerial problem in the initial stage of forming a business venture. The industrial partnering strategy concerns how to overcome the problem...

  6. Wide baseline stereo matching based on double topological relationship consistency

    Science.gov (United States)

    Zou, Xiaohong; Liu, Bin; Song, Xiaoxue; Liu, Yang

    2009-07-01

    Stereo matching is one of the most important branches in computer vision. In this paper, an algorithm is proposed for wide-baseline stereo vision matching. Here, a novel scheme is presented called double topological relationship consistency (DCTR). The combination of double topological configuration includes the consistency of first topological relationship (CFTR) and the consistency of second topological relationship (CSTR). It not only sets up a more advanced model on matching, but discards mismatches by iteratively computing the fitness of the feature matches and overcomes many problems of traditional methods depending on the powerful invariance to changes in the scale, rotation or illumination across large view changes and even occlusions. Experimental examples are shown where the two cameras have been located in very different orientations. Also, epipolar geometry can be recovered using RANSAC by far the most widely method adopted possibly. By the method, we can obtain correspondences with high precision on wide baseline matching problems. Finally, the effectiveness and reliability of this method are demonstrated in wide-baseline experiments on the image pairs.

  7. Using Pareto optimality to explore the topology and dynamics of the human connectome.

    Science.gov (United States)

    Avena-Koenigsberger, Andrea; Goñi, Joaquín; Betzel, Richard F; van den Heuvel, Martijn P; Griffa, Alessandra; Hagmann, Patric; Thiran, Jean-Philippe; Sporns, Olaf

    2014-10-05

    Graph theory has provided a key mathematical framework to analyse the architecture of human brain networks. This architecture embodies an inherently complex relationship between connection topology, the spatial arrangement of network elements, and the resulting network cost and functional performance. An exploration of these interacting factors and driving forces may reveal salient network features that are critically important for shaping and constraining the brain's topological organization and its evolvability. Several studies have pointed to an economic balance between network cost and network efficiency with networks organized in an 'economical' small-world favouring high communication efficiency at a low wiring cost. In this study, we define and explore a network morphospace in order to characterize different aspects of communication efficiency in human brain networks. Using a multi-objective evolutionary approach that approximates a Pareto-optimal set within the morphospace, we investigate the capacity of anatomical brain networks to evolve towards topologies that exhibit optimal information processing features while preserving network cost. This approach allows us to investigate network topologies that emerge under specific selection pressures, thus providing some insight into the selectional forces that may have shaped the network architecture of existing human brains.

  8. Topology

    CERN Document Server

    Hocking, John G

    1988-01-01

    ""As textbook and reference work, this is a valuable addition to the topological literature."" - Mathematical ReviewsDesigned as a text for a one-year first course in topology, this authoritative volume offers an excellent general treatment of the main ideas of topology. It includes a large number and variety of topics from classical topology as well as newer areas of research activity.There are four set-theoretic chapters, followed by four primarily algebraic chapters. Chapter I covers the fundamentals of topological and metrical spaces, mappings, compactness, product spaces, the Tychonoff t

  9. Reliable Line Matching Algorithm for Stereo Images with Topological Relationship

    Directory of Open Access Journals (Sweden)

    WANG Jingxue

    2017-11-01

    Full Text Available Because of the lack of relationships between matching line and adjacent lines in the process of individual line matching, and the weak reliability of the individual line descriptor facing on discontinue texture, this paper presents a reliable line matching algorithm for stereo images with topological relationship. The algorithm firstly generates grouped line pairs from lines extracted from the reference image and searching image according to the basic topological relationships such as distance and angle between the lines. Then it takes the grouped line pairs as matching primitives, and matches these grouped line pairs by using epipolar constraint, homography constraint, quadrant constraint and gray correlation constraint of irregular triangle in order. And finally, it resolves the corresponding line pairs into two pairs of corresponding individual lines, and obtains one to one matching results after the post-processing of integrating, fitting, and checking. This paper adopts digital aerial images and close-range images with typical texture features to deal with the parameter analysis and line matching, and the experiment results demonstrate that the proposed algorithm in this paper can obtain reliable line matching results.

  10. Topological Methods for Visualization

    Energy Technology Data Exchange (ETDEWEB)

    Berres, Anne Sabine [Los Alamos National Lab. (LANL), Los Alamos, NM (United Stat

    2016-04-07

    This slide presentation describes basic topological concepts, including topological spaces, homeomorphisms, homotopy, betti numbers. Scalar field topology explores finding topological features and scalar field visualization, and vector field topology explores finding topological features and vector field visualization.

  11. Exploring quantum control landscapes: Topology, features, and optimization scaling

    International Nuclear Information System (INIS)

    Moore, Katharine W.; Rabitz, Herschel

    2011-01-01

    Quantum optimal control experiments and simulations have successfully manipulated the dynamics of systems ranging from atoms to biomolecules. Surprisingly, these collective works indicate that the effort (i.e., the number of algorithmic iterations) required to find an optimal control field appears to be essentially invariant to the complexity of the system. The present work explores this matter in a series of systematic optimizations of the state-to-state transition probability on model quantum systems with the number of states N ranging from 5 through 100. The optimizations occur over a landscape defined by the transition probability as a function of the control field. Previous theoretical studies on the topology of quantum control landscapes established that they should be free of suboptimal traps under reasonable physical conditions. The simulations in this work include nearly 5000 individual optimization test cases, all of which confirm this prediction by fully achieving optimal population transfer of at least 99.9% on careful attention to numerical procedures to ensure that the controls are free of constraints. Collectively, the simulation results additionally show invariance of required search effort to system dimension N. This behavior is rationalized in terms of the structural features of the underlying control landscape. The very attractive observed scaling with system complexity may be understood by considering the distance traveled on the control landscape during a search and the magnitude of the control landscape slope. Exceptions to this favorable scaling behavior can arise when the initial control field fluence is too large or when the target final state recedes from the initial state as N increases.

  12. Network topology exploration of mesh-based coarse-grain reconfigurable architectures

    NARCIS (Netherlands)

    Bansal, N.; Gupta, S.; Dutt, N.D.; Nicolau, A.; Gupta, R.

    2004-01-01

    Several coarse-grain reconfigurable architectures proposed recently consist of a large number of processing elements (PEs) connected in a mesh-like network topology. We study the effects of three aspects of network topology exploration on the performance of applications on these architectures: (a)

  13. Topology

    CERN Document Server

    Manetti, Marco

    2015-01-01

    This is an introductory textbook on general and algebraic topology, aimed at anyone with a basic knowledge of calculus and linear algebra. It provides full proofs and includes many examples and exercises. The covered topics include: set theory and cardinal arithmetic; axiom of choice and Zorn's lemma; topological spaces and continuous functions; connectedness and compactness; Alexandrov compactification; quotient topologies; countability and separation axioms; prebasis and Alexander's theorem; the Tychonoff theorem and paracompactness; complete metric spaces and function spaces; Baire spaces; homotopy of maps; the fundamental group; the van Kampen theorem; covering spaces; Brouwer and Borsuk's theorems; free groups and free product of groups; and basic category theory. While it is very concrete at the beginning, abstract concepts are gradually introduced. It is suitable for anyone needing a basic, comprehensive introduction to general and algebraic topology and its applications.

  14. Exploring photonic topological insulator states in a circuit-QED lattice

    Science.gov (United States)

    Li, Jing-Ling; Shan, Chuan-Jia; Zhao, Feng

    2018-04-01

    We propose a simple protocol to explore the topological properties of photonic integer quantum Hall states in a one-dimensional circiut-QED lattice. By periodically modulating the on-site photonic energies in such a lattice, we demonstrate that this one-dimensional lattice model can be mapped into a two-dimensional integer quantum Hall insulator model. Based on the lattice-based cavity input-output theory, we show that both the photonic topological protected edge states and topological invariants can be clearly measured from the final steady state of the resonator lattice after taking into account cavity dissipation. Interestingly, we also find that the measurement signals associated with the above topological features are quite unambitious even in five coupled dissipative resonators. Our work opens up a new prospect of exploring topological states with a small-size dissipative quantum artificial lattice, which is quite attractive to the current quantum optics community.

  15. The global relationship between chromatin physical topology, fractal structure, and gene expression

    DEFF Research Database (Denmark)

    Almassalha, Luay M; Tiwari, A; Ruhoff, P T

    2017-01-01

    in an empty space, but in a highly complex, interrelated, and dense nanoenvironment that profoundly influences chemical interactions. We explored the relationship between the physical nanoenvironment of chromatin and gene transcription in vitro. We analytically show that changes in the fractal dimension, D...... show that the increased heterogeneity of physical structure of chromatin due to increase in fractal dimension correlates with increased heterogeneity of gene networks. These findings indicate that the higher order folding of chromatin topology may act as a molecular-pathway independent code regulating...

  16. Relationships among the structural topology, bond strength, and mechanical properties of single-walled aluminosilicate nanotubes.

    Science.gov (United States)

    Liou, Kai-Hsin; Tsou, Nien-Ti; Kang, Dun-Yen

    2015-10-21

    Carbon nanotubes (CNTs) are regarded as small but strong due to their nanoscale microstructure and high mechanical strength (Young's modulus exceeds 1000 GPa). A longstanding question has been whether there exist other nanotube materials with mechanical properties as good as those of CNTs. In this study, we investigated the mechanical properties of single-walled aluminosilicate nanotubes (AlSiNTs) using a multiscale computational method and then conducted a comparison with single-walled carbon nanotubes (SWCNTs). By comparing the potential energy estimated from molecular and macroscopic material mechanics, we were able to model the chemical bonds as beam elements for the nanoscale continuum modeling. This method allowed for simulated mechanical tests (tensile, bending, and torsion) with minimum computational resources for deducing their Young's modulus and shear modulus. The proposed approach also enabled the creation of hypothetical nanotubes to elucidate the relative contributions of bond strength and nanotube structural topology to overall nanotube mechanical strength. Our results indicated that it is the structural topology rather than bond strength that dominates the mechanical properties of the nanotubes. Finally, we investigated the relationship between the structural topology and the mechanical properties by analyzing the von Mises stress distribution in the nanotubes. The proposed methodology proved effective in rationalizing differences in the mechanical properties of AlSiNTs and SWCNTs. Furthermore, this approach could be applied to the exploration of new high-strength nanotube materials.

  17. Using maximum topology matching to explore differences in species distribution models

    Science.gov (United States)

    Poco, Jorge; Doraiswamy, Harish; Talbert, Marian; Morisette, Jeffrey; Silva, Claudio

    2015-01-01

    Species distribution models (SDM) are used to help understand what drives the distribution of various plant and animal species. These models are typically high dimensional scalar functions, where the dimensions of the domain correspond to predictor variables of the model algorithm. Understanding and exploring the differences between models help ecologists understand areas where their data or understanding of the system is incomplete and will help guide further investigation in these regions. These differences can also indicate an important source of model to model uncertainty. However, it is cumbersome and often impractical to perform this analysis using existing tools, which allows for manual exploration of the models usually as 1-dimensional curves. In this paper, we propose a topology-based framework to help ecologists explore the differences in various SDMs directly in the high dimensional domain. In order to accomplish this, we introduce the concept of maximum topology matching that computes a locality-aware correspondence between similar extrema of two scalar functions. The matching is then used to compute the similarity between two functions. We also design a visualization interface that allows ecologists to explore SDMs using their topological features and to study the differences between pairs of models found using maximum topological matching. We demonstrate the utility of the proposed framework through several use cases using different data sets and report the feedback obtained from ecologists.

  18. Network dynamics and its relationships to topology and coupling structure in excitable complex networks

    International Nuclear Information System (INIS)

    Zhang Li-Sheng; Mi Yuan-Yuan; Gu Wei-Feng; Hu Gang

    2014-01-01

    All dynamic complex networks have two important aspects, pattern dynamics and network topology. Discovering different types of pattern dynamics and exploring how these dynamics depend on network topologies are tasks of both great theoretical importance and broad practical significance. In this paper we study the oscillatory behaviors of excitable complex networks (ECNs) and find some interesting dynamic behaviors of ECNs in oscillatory probability, the multiplicity of oscillatory attractors, period distribution, and different types of oscillatory patterns (e.g., periodic, quasiperiodic, and chaotic). In these aspects, we further explore strikingly sharp differences among network dynamics induced by different topologies (random or scale-free topologies) and different interaction structures (symmetric or asymmetric couplings). The mechanisms behind these differences are explained physically. (interdisciplinary physics and related areas of science and technology)

  19. Topological data analysis: A promising big data exploration tool in biology, analytical chemistry and physical chemistry.

    Science.gov (United States)

    Offroy, Marc; Duponchel, Ludovic

    2016-03-03

    An important feature of experimental science is that data of various kinds is being produced at an unprecedented rate. This is mainly due to the development of new instrumental concepts and experimental methodologies. It is also clear that the nature of acquired data is significantly different. Indeed in every areas of science, data take the form of always bigger tables, where all but a few of the columns (i.e. variables) turn out to be irrelevant to the questions of interest, and further that we do not necessary know which coordinates are the interesting ones. Big data in our lab of biology, analytical chemistry or physical chemistry is a future that might be closer than any of us suppose. It is in this sense that new tools have to be developed in order to explore and valorize such data sets. Topological data analysis (TDA) is one of these. It was developed recently by topologists who discovered that topological concept could be useful for data analysis. The main objective of this paper is to answer the question why topology is well suited for the analysis of big data set in many areas and even more efficient than conventional data analysis methods. Raman analysis of single bacteria should be providing a good opportunity to demonstrate the potential of TDA for the exploration of various spectroscopic data sets considering different experimental conditions (with high noise level, with/without spectral preprocessing, with wavelength shift, with different spectral resolution, with missing data). Copyright © 2016 Elsevier B.V. All rights reserved.

  20. Phenomenology of polymorphism: The topological pressure-temperature phase relationships of the dimorphism of finasteride

    Energy Technology Data Exchange (ETDEWEB)

    Gana, Ines [EAD Physico-chimie Industrielle du Medicament (EA 4066), Faculte de Pharmacie, Universite Paris Descartes, 4 Avenue de l' Observatoire, 75006 Paris (France) and Etablissement pharmaceutique de l' Assistance Publique - Hopitaux de Paris, Agence Generale des Equipements et Produits de Sante, 7 Rue du Fer a moulin, 75005 Paris (France); Ceolin, Rene [EAD Physico-chimie Industrielle du Medicament (EA 4066), Faculte de Pharmacie, Universite Paris Descartes, 4 Avenue de l' Observatoire, 75006 Paris (France); Rietveld, Ivo B., E-mail: ivo.rietveld@parisdescartes.fr [EAD Physico-chimie Industrielle du Medicament (EA 4066), Faculte de Pharmacie, Universite Paris Descartes, 4 Avenue de l' Observatoire, 75006 Paris (France)

    2012-10-20

    Highlights: Black-Right-Pointing-Pointer The topological pressure-temperature phase diagram for the dimorphism of finasteride. Black-Right-Pointing-Pointer Pressure affects phase equilibria: an enantiotropic phase relationship turning monotropic at high pressure. Black-Right-Pointing-Pointer The influence of pressure on phase behavior inferred from data obtained under ordinary conditions. - Abstract: Knowledge of the phase behavior in the solid state of active pharmaceutical ingredients is important for the development of stable drug formulations. The topological method for the construction of pressure-temperature phase diagrams has been applied to study the phase behavior of finasteride. It is demonstrated that with basic calorimetric measurements and X-ray diffraction sufficient data can be obtained to construct a complete topological pressure-temperature phase diagram. The dimorphism observed for finasteride gives rise to a phase diagram similar to the paradigmatic diagram of sulfur. The solid-solid phase relationship is enantiotropic at ordinary pressure and becomes monotropic at elevated pressure, where solid I is the only stable phase.

  1. Phenomenology of polymorphism: The topological pressure–temperature phase relationships of the dimorphism of finasteride

    International Nuclear Information System (INIS)

    Gana, Inès; Céolin, René; Rietveld, Ivo B.

    2012-01-01

    Highlights: ► The topological pressure–temperature phase diagram for the dimorphism of finasteride. ► Pressure affects phase equilibria: an enantiotropic phase relationship turning monotropic at high pressure. ► The influence of pressure on phase behavior inferred from data obtained under ordinary conditions. - Abstract: Knowledge of the phase behavior in the solid state of active pharmaceutical ingredients is important for the development of stable drug formulations. The topological method for the construction of pressure–temperature phase diagrams has been applied to study the phase behavior of finasteride. It is demonstrated that with basic calorimetric measurements and X-ray diffraction sufficient data can be obtained to construct a complete topological pressure–temperature phase diagram. The dimorphism observed for finasteride gives rise to a phase diagram similar to the paradigmatic diagram of sulfur. The solid–solid phase relationship is enantiotropic at ordinary pressure and becomes monotropic at elevated pressure, where solid I is the only stable phase.

  2. A Topological Extension of General Relativity to Explore the Nature of Quantum Spacetime, Dark Energy and Inflation

    NARCIS (Netherlands)

    Spaans, M.

    General Relativity is extended into the quantum domain. A thought experiment is explored to derive a specific topological build-up for Planckian spacetime. The presented arguments are inspired by Feynman's path integral for superposition and Wheeler's quantum foam of Planck mass mini black holes

  3. Electron-topological investigation of the structure-antitumor activity relationship of thiosemicarbazone derivatives.

    Science.gov (United States)

    Dimoglo, A S; Chumakov, Y M; Dobrova, B N; Saracoglu, M

    1997-04-01

    In the frameworks of the electron-topological method (ETM) the structure-antitumor activity relationship was investigated for a series of thiosemicarbazone derivatives. The series included 70 compounds. Conformational analysis and quantum-chemical calculations were carried out for each compound. The revealed activity feature showed a satisfactory description of the class of active compounds according to two different parameters P and alpha estimating the probabilities of the feature realization in the class of active compounds (they are equal to 0.94 and 0.86, correspondingly). The results of testing demonstrated the high ability of ETM in predicting the activity investigated.

  4. Exploring trust relationships during times of change

    Directory of Open Access Journals (Sweden)

    Hartmut Von der Ohe

    2010-10-01

    Research purpose: The objective of this study was to explore the impact of different variables such as demographics on trust relationships in South African organisations. Motivation for the study: Anecdotal evidence and preliminary data collected for a national trust indicator seemed to suggest a shift in trust levels in organisations. Research design: A trust questionnaire was administered to a convenience sample of 307 respondents in all economic sectors. Parametric and nonparametric analyses were used to determine significant differences among economic sectors, job levels and sample periods. Main findings: No significant differences were found for job levels or the different sample periods. However, significant differences were found for the economic sectors and, specifically, between government participants and other sectors for the dimensions of change, team management, organisational trust, information sharing and credibility. Practical implications: In times of change, leadership in organisations need to be aware of the impact on trust levels. It is therefore important that leaders in government focus more on trust-enhancing behaviours needed to repair mistrust in organisations. Contribution: Although the effect of time on trust levels is inconclusive, the clearly differing levels of trust in various economic sectors point to the importance of appropriate and fitting approaches to building trust and not a ‘one-size-fits-all’ attitude.

  5. Exploring 4D quantum Hall physics with a 2D topological charge pump

    Science.gov (United States)

    Lohse, Michael; Schweizer, Christian; Price, Hannah M.; Zilberberg, Oded; Bloch, Immanuel

    2018-01-01

    The discovery of topological states of matter has greatly improved our understanding of phase transitions in physical systems. Instead of being described by local order parameters, topological phases are described by global topological invariants and are therefore robust against perturbations. A prominent example is the two-dimensional (2D) integer quantum Hall effect: it is characterized by the first Chern number, which manifests in the quantized Hall response that is induced by an external electric field. Generalizing the quantum Hall effect to four-dimensional (4D) systems leads to the appearance of an additional quantized Hall response, but one that is nonlinear and described by a 4D topological invariant—the second Chern number. Here we report the observation of a bulk response with intrinsic 4D topology and demonstrate its quantization by measuring the associated second Chern number. By implementing a 2D topological charge pump using ultracold bosonic atoms in an angled optical superlattice, we realize a dynamical version of the 4D integer quantum Hall effect. Using a small cloud of atoms as a local probe, we fully characterize the nonlinear response of the system via in situ imaging and site-resolved band mapping. Our findings pave the way to experimentally probing higher-dimensional quantum Hall systems, in which additional strongly correlated topological phases, exotic collective excitations and boundary phenomena such as isolated Weyl fermions are predicted.

  6. Exploring 4D quantum Hall physics with a 2D topological charge pump.

    Science.gov (United States)

    Lohse, Michael; Schweizer, Christian; Price, Hannah M; Zilberberg, Oded; Bloch, Immanuel

    2018-01-03

    The discovery of topological states of matter has greatly improved our understanding of phase transitions in physical systems. Instead of being described by local order parameters, topological phases are described by global topological invariants and are therefore robust against perturbations. A prominent example is the two-dimensional (2D) integer quantum Hall effect: it is characterized by the first Chern number, which manifests in the quantized Hall response that is induced by an external electric field. Generalizing the quantum Hall effect to four-dimensional (4D) systems leads to the appearance of an additional quantized Hall response, but one that is nonlinear and described by a 4D topological invariant-the second Chern number. Here we report the observation of a bulk response with intrinsic 4D topology and demonstrate its quantization by measuring the associated second Chern number. By implementing a 2D topological charge pump using ultracold bosonic atoms in an angled optical superlattice, we realize a dynamical version of the 4D integer quantum Hall effect. Using a small cloud of atoms as a local probe, we fully characterize the nonlinear response of the system via in situ imaging and site-resolved band mapping. Our findings pave the way to experimentally probing higher-dimensional quantum Hall systems, in which additional strongly correlated topological phases, exotic collective excitations and boundary phenomena such as isolated Weyl fermions are predicted.

  7. Exploring ethical implications of personal relationships in dyadic business exchanges

    OpenAIRE

    Davidrajuh, Reggie

    2007-01-01

    This paper explores the ethical implications of the existence of personal relationships in business exchanges. Firstly, this paper introduces personal relationship in business exchanges. Secondly, three normative theories of business ethics that are related to the issue of personal relationship are presented. Finally, this paper explores the ethical implications on personal relationships according to the three theories. The main recommendation of this paper is that an analysis of ...

  8. A new logistic dynamic particle swarm optimization algorithm based on random topology.

    Science.gov (United States)

    Ni, Qingjian; Deng, Jianming

    2013-01-01

    Population topology of particle swarm optimization (PSO) will directly affect the dissemination of optimal information during the evolutionary process and will have a significant impact on the performance of PSO. Classic static population topologies are usually used in PSO, such as fully connected topology, ring topology, star topology, and square topology. In this paper, the performance of PSO with the proposed random topologies is analyzed, and the relationship between population topology and the performance of PSO is also explored from the perspective of graph theory characteristics in population topologies. Further, in a relatively new PSO variant which named logistic dynamic particle optimization, an extensive simulation study is presented to discuss the effectiveness of the random topology and the design strategies of population topology. Finally, the experimental data are analyzed and discussed. And about the design and use of population topology on PSO, some useful conclusions are proposed which can provide a basis for further discussion and research.

  9. Exploring Longitudinal Risk-return Relationships

    DEFF Research Database (Denmark)

    Andersen, Torben J.; Bettis, Richard A.

    2015-01-01

    We study a longitudinal fit model of adaptation and its association with the longitudinal risk-return relationship. The model allows the firm to adjust its position in response to partial learning about a changing environment characterized by two path-dependent processes—a random walk and a stoch......We study a longitudinal fit model of adaptation and its association with the longitudinal risk-return relationship. The model allows the firm to adjust its position in response to partial learning about a changing environment characterized by two path-dependent processes—a random walk...... can lead to the inverse longitudinal risk-return relationships observed empirically. We discuss this apparent paradox and the possible resolution between mindless and conscious behavior as plausible causes of the longitudinal Bowman Paradox....

  10. Exploring the relationship between demographic factors ...

    African Journals Online (AJOL)

    The significant, albeit moderate, positive correlation between fortitude and academic performance highlights the need for further exploration of wellbeing and holistic development of medical students. Support programmes are recommended to bridge the gap related to gender and educational background. Low and fair ...

  11. Exploring Relationships between Personality and Anatomy Performance

    Science.gov (United States)

    Finn, Gabrielle M.; Walker, Simon J.; Carter, Madeline; Cox, David R.; Hewitson, Ruth; Smith, Claire F.

    2015-01-01

    There is increasing recognition in medicine of the importance of noncognitive factors, including personality, for performance, and for good medical practice. The personality domain of conscientiousness is a well-established predictor of performance in workplace and academic settings. This study investigates the relationships between the "Big…

  12. An Exploration of Supervisory and Therapeutic Relationships and Client Outcomes

    Science.gov (United States)

    Bell, Hope; Hagedorn, W. Bryce; Robinson, E. H. Mike

    2016-01-01

    The authors explored the connection between the facilitative conditions present within the supervisory relationship, the therapeutic relationship, and client outcomes. A correlational research design was used with a sample of 55 counselors-in-training and 88 clients. Results indicated a significant positive relationship between the therapeutic…

  13. Evolution of the turtle bauplan: the topological relationship of the scapula relative to the ribcage.

    Science.gov (United States)

    Lyson, Tyler R; Joyce, Walter G

    2012-12-23

    The turtle shell and the relationship of the shoulder girdle inside or 'deep' to the ribcage have puzzled neontologists and developmental biologists for more than a century. Recent developmental and fossil data indicate that the shoulder girdle indeed lies inside the shell, but anterior to the ribcage. Developmental biologists compare this orientation to that found in the model organisms mice and chickens, whose scapula lies laterally on top of the ribcage. We analyse the topological relationship of the shoulder girdle relative to the ribcage within a broader phylogenetic context and determine that the condition found in turtles is also found in amphibians, monotreme mammals and lepidosaurs. A vertical scapula anterior to the thoracic ribcage is therefore inferred to be the basal amniote condition and indicates that the condition found in therian mammals and archosaurs (which includes both developmental model organisms: chickens and mice) is derived and not appropriate for studying the developmental origin of the turtle shell. Instead, among amniotes, either monotreme mammals or lepidosaurs should be used.

  14. A hybrid computational model to explore the topological characteristics of epithelial tissues.

    Science.gov (United States)

    González-Valverde, Ismael; García-Aznar, José Manuel

    2017-11-01

    Epithelial tissues show a particular topology where cells resemble a polygon-like shape, but some biological processes can alter this tissue topology. During cell proliferation, mitotic cell dilation deforms the tissue and modifies the tissue topology. Additionally, cells are reorganized in the epithelial layer and these rearrangements also alter the polygon distribution. We present here a computer-based hybrid framework focused on the simulation of epithelial layer dynamics that combines discrete and continuum numerical models. In this framework, we consider topological and mechanical aspects of the epithelial tissue. Individual cells in the tissue are simulated by an off-lattice agent-based model, which keeps the information of each cell. In addition, we model the cell-cell interaction forces and the cell cycle. Otherwise, we simulate the passive mechanical behaviour of the cell monolayer using a material that approximates the mechanical properties of the cell. This continuum approach is solved by the finite element method, which uses a dynamic mesh generated by the triangulation of cell polygons. Forces generated by cell-cell interaction in the agent-based model are also applied on the finite element mesh. Cell movement in the agent-based model is driven by the displacements obtained from the deformed finite element mesh of the continuum mechanical approach. We successfully compare the results of our simulations with some experiments about the topology of proliferating epithelial tissues in Drosophila. Our framework is able to model the emergent behaviour of the cell monolayer that is due to local cell-cell interactions, which have a direct influence on the dynamics of the epithelial tissue. Copyright © 2017 John Wiley & Sons, Ltd.

  15. Topological insulators

    CERN Document Server

    Franz, Marcel

    2013-01-01

    Topological Insulators, volume six in the Contemporary Concepts of Condensed Matter Series, describes the recent revolution in condensed matter physics that occurred in our understanding of crystalline solids. The book chronicles the work done worldwide that led to these discoveries and provides the reader with a comprehensive overview of the field. Starting in 2004, theorists began to explore the effect of topology on the physics of band insulators, a field previously considered well understood. However, the inclusion of topology brings key new elements into this old field. Whereas it was

  16. Representation of molecular structure using quantum topology with inductive logic programming in structure-activity relationships.

    Science.gov (United States)

    Buttingsrud, Bård; Ryeng, Einar; King, Ross D; Alsberg, Bjørn K

    2006-06-01

    The requirement of aligning each individual molecule in a data set severely limits the type of molecules which can be analysed with traditional structure activity relationship (SAR) methods. A method which solves this problem by using relations between objects is inductive logic programming (ILP). Another advantage of this methodology is its ability to include background knowledge as 1st-order logic. However, previous molecular ILP representations have not been effective in describing the electronic structure of molecules. We present a more unified and comprehensive representation based on Richard Bader's quantum topological atoms in molecules (AIM) theory where critical points in the electron density are connected through a network. AIM theory provides a wealth of chemical information about individual atoms and their bond connections enabling a more flexible and chemically relevant representation. To obtain even more relevant rules with higher coverage, we apply manual postprocessing and interpretation of ILP rules. We have tested the usefulness of the new representation in SAR modelling on classifying compounds of low/high mutagenicity and on a set of factor Xa inhibitors of high and low affinity.

  17. Introduction to topology

    CERN Document Server

    Gamelin, Theodore W

    1999-01-01

    A fresh approach to introductory topology, this volume explains nontrivial applications of metric space topology to analysis, clearly establishing their relationship. Also, topics from elementary algebraic topology focus on concrete results with minimal algebraic formalism. The first two chapters consider metric space and point-set topology; the second two, algebraic topological material. 1983 edition. Solutions to Selected Exercises. List of Notations. Index. 51 illustrations.

  18. Staff turnover in hotels : exploring the quadratic and linear relationships.

    OpenAIRE

    Mohsin, A.; Lengler, J.F.B.; Aguzzoli, R.L.

    2015-01-01

    The aim of this study is to assess whether the relationship between intention to leave the job and its antecedents is quadratic or linear. To explore those relationships a theoretical model (see Fig. 1) and eight hypotheses are proposed. Each linear hypothesis is followed by an alternative quadratic hypothesis. The alternative hypotheses propose that the relationship between the four antecedent constructs and intention to leave the job might not be linear, as the existing literature suggests....

  19. Social work - client relationship practice: exploring social worker perspectives

    OpenAIRE

    WENDY ELIZABETH ROLLINS

    2018-01-01

    This thesis explores, using qualitative methodology, the significance of social worker – client relationships for achieving client outcomes in the field of child and family welfare. The study found that social worker – client relationships are critical for achieving outcomes. It is a distinct practice method, informed by relational views about ‘the self’, human development and healing. The social worker, as Relationship Building Agent, is heavily focused on client engagement and building t...

  20. Exploring How Video Digital Storytelling Builds Relationship Experiences

    OpenAIRE

    Pera, R; Viglia, Giampaolo

    2016-01-01

    The purpose of the paper is to explore how digital storytelling enables a consumer relationship experience in online peer-to-peer communities. Within the value cocreation framework, digital storytelling is interpreted as an encounter communication practice where consumers adopt the role of storytellers and story receivers. This study adopts a qualitative multimethod approach to investigate the meanings contained in video stories and the linkage to relationship experience. A case study based o...

  1. Exploring the Interaction Natures in Plutonyl (VI Complexes with Topological Analyses of Electron Density

    Directory of Open Access Journals (Sweden)

    Jiguang Du

    2016-04-01

    Full Text Available The interaction natures between Pu and different ligands in several plutonyl (VI complexes are investigated by performing topological analyses of electron density. The geometrical structures in both gaseous and aqueous phases are obtained with B3LYP functional, and are generally in agreement with available theoretical and experimental results when combined with all-electron segmented all-electron relativistic contracted (SARC basis set. The Pu– O y l bond orders show significant linear dependence on bond length and the charge of oxygen atoms in plutonyl moiety. The closed-shell interactions were identified for Pu-Ligand bonds in most complexes with quantum theory of atoms in molecules (QTAIM analyses. Meanwhile, we found that some Pu–Ligand bonds, like Pu–OH−, show weak covalent. The interactive nature of Pu–ligand bonds were revealed based on the interaction quantum atom (IQA energy decomposition approach, and our results indicate that all Pu–Ligand interactions is dominated by the electrostatic attraction interaction as expected. Meanwhile it is also important to note that the quantum mechanical exchange-correlation contributions can not be ignored. By means of the non-covalent interaction (NCI approach it has been found that some weak and repulsion interactions existed in plutonyl(VI complexes, which can not be distinguished by QTAIM, can be successfully identified.

  2. Analysis of topological relationships and network properties in the interactions of human beings.

    Directory of Open Access Journals (Sweden)

    Ye Yuan

    Full Text Available In the animal world, various kinds of collective motions have been found and proven to be efficient ways of carrying out some activities such as searching for food and avoiding predators. Many scholars research the interactions of collective behaviors of human beings according to the rules of collective behaviors of animals. Based on the Lennard-Jones potential function and a self-organization process, our paper proposes a topological communication model to simulate the collective behaviors of human beings. In the results of simulations, we find various types of collective behavior and fission behavior and discover the threshold for the emergence of collective behavior, which is the range five to seven for the number of topology K. According to the analysis of network properties of the model, the in-degree of individuals is always equal to the number of topology. In the stable state, the out-degrees of individuals distribute around the value of the number of topology K, except that the out-degree of a single individual is approximately double the out-degrees of the other individuals. In addition, under different initial conditions, some features of different kinds of networks emerge from the model. We also find the leader and herd mentality effects in the characteristics of the behaviors of human beings in our model. Thus, this work could be used to discover how to promote the emergence of beneficial group behaviors and prevent the emergence of harmful behaviors.

  3. Organizational topology of brain and its relationship to ADHD in adolescents with d-transposition of the great arteries.

    Science.gov (United States)

    Schmithorst, Vincent J; Panigrahy, Ashok; Gaynor, J William; Watson, Christopher G; Lee, Vince; Bellinger, David C; Rivkin, Michael J; Newburger, Jane W

    2016-08-01

    Little is currently known about the impact of congenital heart disease (CHD) on the organization of large-scale brain networks in relation to neurobehavioral outcome. We investigated whether CHD might impact ADHD symptoms via changes in brain structural network topology in a cohort of adolescents with d-transposition of the great arteries (d-TGA) repaired with the arterial switch operation in early infancy and referent subjects. We also explored whether these effects might be modified by apolipoprotein E (APOE) genotype, as the APOE ε2 allele has been associated with worse neurodevelopmental outcomes after repair of d-TGA in infancy. We applied graph analysis techniques to diffusion tensor imaging (DTI) data obtained from 47 d-TGA adolescents and 29 healthy referents to construct measures of structural topology at the global and regional levels. We developed statistical mediation models revealing the respective contributions of d-TGA, APOE genotype, and structural network topology on ADHD outcome as measured by the Connors ADHD/DSM-IV Scales (CADS). Changes in overall network connectivity, integration, and segregation mediated worse ADHD outcomes in d-TGA patients compared to healthy referents; these changes were predominantly in the left and right intrahemispheric regional subnetworks. Exploratory analysis revealed that network topology also mediated detrimental effects of the APOE ε4 allele but improved neurobehavioral outcomes for the APOE ε2 allele. Our results suggest that disruption of organization of large-scale networks may contribute to neurobehavioral dysfunction in adolescents with CHD and that this effect may interact with APOE genotype.

  4. Interpersonal Relationships: Exploring Race and Relationship Decisions among African American College Men

    Science.gov (United States)

    McGowan, Brian L.

    2016-01-01

    This study explores how race influenced African American men's interpersonal relationships with other men at a predominantly White institution. The use of both semi-structured and photo-elicitation interview formats provided participants an opportunity to reflect on their precollege experiences, identity, and relationships. Two categories emerged…

  5. EXPLORING FATHER-DAUGHTER RELATIONSHIP IN THE ABHIJNANSAKUNTALAM AND HAMLET

    Directory of Open Access Journals (Sweden)

    Dr. Naveen K. MEHTA

    2011-05-01

    Full Text Available In Shakespearian dramas, the kingly authority merges with the authority of a father. Shakespeare uses the father-daughter relationship fundamentally to discredit the practice of possession and the attitude of cupidity which was under attack in the Renaissance. During the world’s famous Indian dramatist Kalidasa period, the father was considered to be the head of the family. Kalidasa's immortal works also suggest that counsels of parents and teachers must be obeyed without any hesitation. The present paper is an attempt to explore the intricacies of the father-daughter relationship in the „Abhijnansakuntalam” and „Hamlet”, „Prince of Denmark”

  6. Exploring the relationship between sequence similarity and accurate phylogenetic trees.

    Science.gov (United States)

    Cantarel, Brandi L; Morrison, Hilary G; Pearson, William

    2006-11-01

    We have characterized the relationship between accurate phylogenetic reconstruction and sequence similarity, testing whether high levels of sequence similarity can consistently produce accurate evolutionary trees. We generated protein families with known phylogenies using a modified version of the PAML/EVOLVER program that produces insertions and deletions as well as substitutions. Protein families were evolved over a range of 100-400 point accepted mutations; at these distances 63% of the families shared significant sequence similarity. Protein families were evolved using balanced and unbalanced trees, with ancient or recent radiations. In families sharing statistically significant similarity, about 60% of multiple sequence alignments were 95% identical to true alignments. To compare recovered topologies with true topologies, we used a score that reflects the fraction of clades that were correctly clustered. As expected, the accuracy of the phylogenies was greatest in the least divergent families. About 88% of phylogenies clustered over 80% of clades in families that shared significant sequence similarity, using Bayesian, parsimony, distance, and maximum likelihood methods. However, for protein families with short ancient branches (ancient radiation), only 30% of the most divergent (but statistically significant) families produced accurate phylogenies, and only about 70% of the second most highly conserved families, with median expectation values better than 10(-60), produced accurate trees. These values represent upper bounds on expected tree accuracy for sequences with a simple divergence history; proteins from 700 Giardia families, with a similar range of sequence similarities but considerably more gaps, produced much less accurate trees. For our simulated insertions and deletions, correct multiple sequence alignments did not perform much better than those produced by T-COFFEE, and including sequences with expressed sequence tag-like sequencing errors did not

  7. Beliefs about work and beliefs about groupwork: Exploring the relationship

    OpenAIRE

    Cullen, John G.

    2013-01-01

    Smrt & Karau’s (2011) finding that the Protestant Work Ethic (PWE) influences individual behaviour towards groups, emphasized that individuals who have a stronger PWE are less likely to socially loaf. This note aims to contribute to this research by exploring the influence which a key component of the PWE, the vocation, has on individual beliefs about groupwork. An online questionnaire based on Wrzesniewski et al.’s (1997) research on personal relationships to work and Karau & Elsaid’s (200...

  8. EXPLORING THE RELATIONSHIP BETWEEN LOCAL FOOD CONSUMPTION AND INTENTIONAL LOYALTY

    OpenAIRE

    Mamoon ALLAN

    2016-01-01

    In the pertinent literature on tourism supply, the relative importance of local food tourism has been subject to considerable discussion. Despite the breadth of such literature, there is a general lack of research on role of local food in tourism in the Middle East, in general and Jordan, in particular. Therefore, the aim of this study is to explore the local food consumption motivations  and their relationship with intentional loyalty for international tourists. The study indicated that the ...

  9. Exploring the relationship between entrepreneurial behavior and teachers' job satisfaction

    DEFF Research Database (Denmark)

    do Carmo Amorim Neto, Roque; Rodrigues, Vinicius Picanco; Panzer, Shannon

    2017-01-01

    and private schools responded to the survey. Statistical analysis revealed a moderate correlation between entrepreneurial behavior and job satisfaction. Results also show that gender and educational level are associated with entrepreneurial behavior. The discussion includes theoretical and practical......This exploratory study has two goals: exploring the relationship between entrepreneurial behavior and job satisfaction among teachers, and identifying the demographic characteristics associated with both variables. Using a snowball technique, a sample of 385 K-12 Brazilian teachers from public...

  10. Qualitative exploration of relationships between peers in residential addiction treatment.

    Science.gov (United States)

    Neale, Joanne; Tompkins, Charlotte N E; Strang, John

    2018-01-01

    Relationships between peers are often considered central to the therapeutic process, yet there is relatively little empirical research either on the nature of peer-to-peer relationships within residential treatment or on how those relationships generate positive behaviour change or facilitate recovery. In this paper, we explore relationships between peers in residential addiction treatment, drawing upon the concept of social capital to frame our analyses. Our study was undertaken during 2015 and 2016 in two English residential treatment services using the same therapeutic community-informed model of treatment. We conducted 22 in-depth interviews with 13 current and 9 former service residents. All interviews were audio-recorded, transcribed verbatim, coded in MAXQDA, and analysed using Iterative Categorisation. Residents reported difficult relationship histories and limited social networks on entry into treatment. Once in treatment, few residents described bonding with their peers on the basis of shared experiences and lifestyles. Instead, interpersonal differences polarised residents in ways that undermined their social capital further. Some senior peers who had been in residential treatment longer acted as positive role models, but many modelled negative behaviours that undermined others' commitment to treatment. Relationships between peers could generate feelings of comfort and connectedness, and friendships developed when residents found things in common with each other. However, residents more often reported isolation, loneliness, wariness, bullying, manipulation, intimidation, social distancing, tensions and conflict. Overall, relationships between peers within residential treatment seemed to generate some positive but more negative social capital; undermining the notion of the community as a method of positive behaviour change. With the caveat that our data have limitations and further research is needed, we suggest that residential treatment providers should

  11. Revealing the relationships between chemistry, topology and stiffness of ultrastrong Co-based metallic glass thin films: A combinatorial approach

    International Nuclear Information System (INIS)

    Schnabel, Volker; Köhler, Mathias; Evertz, Simon; Gamcova, Jana; Bednarcik, Jozef; Music, Denis; Raabe, Dierk; Schneider, Jochen M.

    2016-01-01

    An efficient way to study the relationship between chemical composition and mechanical properties of thin films is to utilize the combinatorial approach, where spatially resolved mechanical property measurements are conducted along a concentration gradient. However, for thin film glasses many properties including the mechanical response are affected by chemical topology. Here a novel method is introduced which enables spatially resolved short range order analysis along concentration gradients of combinatorially synthesized metallic glass thin films. For this purpose a CoZrTaB metallic glass film of 3 μm thickness is deposited on a polyimide foil, which is investigated by high energy X-ray diffraction in transmission mode. Through the correlative chemistry-topology-stiffness investigation, we observe that an increase in metalloid concentration from 26.4 to 32.7 at% and the associated formation of localized (hybridized) metal – metalloid bonds induce a 10% increase in stiffness. Concomitantly, along the same composition gradient, a metalloid-concentration-induced increase in first order metal - metal bond distances of 1% is observed, which infers itinerant (metallic) bond weakening. Hence, the metalloid concentration induced increase in hybridized bonding dominates the corresponding weakening of metallic bonds.

  12. RELATIONSHIP BETWEEN CHROMOSPHERIC EVAPORATION AND MAGNETIC FIELD TOPOLOGY IN AN M-CLASS SOLAR FLARE

    Energy Technology Data Exchange (ETDEWEB)

    Sadykov, Viacheslav M; Kosovichev, Alexander G [Department of Physics, New Jersey Institute of Technology, Newark, NJ 07102 (United States); Sharykin, Ivan N; Zimovets, Ivan V [Space Research Institute (IKI) of Russian Academy of Sciences, Moscow 117997 (Russian Federation); Dominguez, Santiago Vargas [Universidad Nacional de Colombia, Sede Bogotá, Observatorio Astronómico, Carrera 45 # 26-85, Bogotá (Colombia)

    2016-09-01

    Chromospheric evaporation is observed as Doppler blueshift during solar flares. It plays a key role in the dynamics and energetics of solar flares; however, its mechanism is still unknown. In this paper, we present a detailed analysis of spatially resolved multi-wavelength observations of chromospheric evaporation during an M 1.0-class solar flare (SOL2014-06-12T21:12) using data from NASA’s Interface Region Imaging Spectrograph and HMI/ SDO (the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory), and high-resolution observations from VIS/NST (the Visible Imaging Spectrometer at the New Solar Telescope). The results show that the averaged over the flare region Fe xxi blueshift of the hot (10{sup 7} K) evaporating plasma is delayed relative to the C ii redshift of the relatively cold (10{sup 4} K) chromospheric plasma by about one minute. The spatial distribution of the delays is not uniform across the region and can be as long as two minutes in several zones. Using vector magnetograms from HMI, we reconstruct the magnetic field topology and the quasi-separatrix layer, and find that the blueshift delay regions as well as the H α flare ribbons are connected to the region of the magnetic polarity inversion line (PIL) and an expanding flux rope via a system of low-lying loop arcades with a height of ≲4.5 Mm. As a result, the chromospheric evaporation may be driven by the energy release in the vicinity of PIL, and has the observed properties due to a local magnetic field topology.

  13. Duo-Active-Neutral-Point-Clamped Multilevel Converter: An Exploration of the Fundamental Topology and Experimental Verification

    DEFF Research Database (Denmark)

    Dargahi, Vahid; Corzine, Keith A.; Enslin, Johan H.

    2018-01-01

    For medium-voltage (MV) industrial applications such as the HVDC and adjustable-speed ac-motor drives, the multilevel voltage-source converters are deemed the predominant topologies. One of the promising derived-topologies from the neutral-point-clamped (NPC) configuration is the active NPC (ANPC......) structure with an improved balanced lossdistribution performance. This paper introduces duo-ANPC (D-ANPC) converter topology, which is controlled with a new modulation technique. The suggested control method regulates the flying capacitor (FC) voltages naturally at their reference values and preserves...

  14. Free will and mental disorder: exploring the relationship.

    Science.gov (United States)

    Meynen, Gerben

    2010-12-01

    A link between mental disorder and freedom is clearly present in the introduction of the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV). It mentions "an important loss of freedom" as one of the possible defining features of mental disorder. Meanwhile, it remains unclear how "an important loss of freedom" should be understood. In order to get a clearer view on the relationship between mental disorder and (a loss of) freedom, in this article, I will explore the link between mental disorder and free will. I examine two domains in which a connection between mental disorder and free will is present: the philosophy of free will and forensic psychiatry. As it turns out, philosophers of free will frequently refer to mental disorders as conditions that compromise free will and reduce moral responsibility. In addition, in forensic psychiatry, the rationale for the assessment of criminal responsibility is often explained by referring to the fact that mental disorders can compromise free will. Yet, in both domains, it remains unclear in what way free will is compromised by mental disorders. Based on the philosophical debate, I discuss three senses of free will and explore their relevance to mental disorders. I conclude that in order to further clarify the relationship between free will and mental disorder, the accounts of people who have actually experienced the impact of a mental disorder should be included in future research.

  15. EXPLORING THE RELATIONSHIP BETWEEN LOCAL FOOD CONSUMPTION AND INTENTIONAL LOYALTY

    Directory of Open Access Journals (Sweden)

    Mamoon ALLAN

    2016-07-01

    Full Text Available In the pertinent literature on tourism supply, the relative importance of local food tourism has been subject to considerable discussion. Despite the breadth of such literature, there is a general lack of research on role of local food in tourism in the Middle East, in general and Jordan, in particular. Therefore, the aim of this study is to explore the local food consumption motivations  and their relationship with intentional loyalty for international tourists. The study indicated that the cultural experience is the central motivation for respondents to experience local food. In addition, it showed that the excitement motivation was the high significant predictor of the behavioural intention (loyalty. On the basis of the findings, tourism management in Jordan should add local food to its tourism discourse and improve the nature and scope of the current marketing and promotion strategies of local food.

  16. The nuclear higher-order structure defined by the set of topological relationships between DNA and the nuclear matrix is species-specific in hepatocytes.

    Science.gov (United States)

    Silva-Santiago, Evangelina; Pardo, Juan Pablo; Hernández-Muñoz, Rolando; Aranda-Anzaldo, Armando

    2017-01-15

    During the interphase the nuclear DNA of metazoan cells is organized in supercoiled loops anchored to constituents of a nuclear substructure or compartment known as the nuclear matrix. The stable interactions between DNA and the nuclear matrix (NM) correspond to a set of topological relationships that define a nuclear higher-order structure (NHOS). Current evidence suggests that the NHOS is cell-type-specific. Biophysical evidence and theoretical models suggest that thermodynamic and structural constraints drive the actualization of DNA-NM interactions. However, if the topological relationships between DNA and the NM were the subject of any biological constraint with functional significance then they must be adaptive and thus be positively selected by natural selection and they should be reasonably conserved, at least within closely related species. We carried out a coarse-grained, comparative evaluation of the DNA-NM topological relationships in primary hepatocytes from two closely related mammals: rat and mouse, by determining the relative position to the NM of a limited set of target sequences corresponding to highly-conserved genomic regions that also represent a sample of distinct chromosome territories within the interphase nucleus. Our results indicate that the pattern of topological relationships between DNA and the NM is not conserved between the hepatocytes of the two closely related species, suggesting that the NHOS, like the karyotype, is species-specific. Copyright © 2016 Elsevier B.V. All rights reserved.

  17. Exploring the relationship between fractal features and bacterial essential genes

    International Nuclear Information System (INIS)

    Yu Yong-Ming; Yang Li-Cai; Zhao Lu-Lu; Liu Zhi-Ping; Zhou Qian

    2016-01-01

    Essential genes are indispensable for the survival of an organism in optimal conditions. Rapid and accurate identifications of new essential genes are of great theoretical and practical significance. Exploring features with predictive power is fundamental for this. Here, we calculate six fractal features from primary gene and protein sequences and then explore their relationship with gene essentiality by statistical analysis and machine learning-based methods. The models are applied to all the currently available identified genes in 27 bacteria from the database of essential genes (DEG). It is found that the fractal features of essential genes generally differ from those of non-essential genes. The fractal features are used to ascertain the parameters of two machine learning classifiers: Naïve Bayes and Random Forest. The area under the curve (AUC) of both classifiers show that each fractal feature is satisfactorily discriminative between essential genes and non-essential genes individually. And, although significant correlations exist among fractal features, gene essentiality can also be reliably predicted by various combinations of them. Thus, the fractal features analyzed in our study can be used not only to construct a good essentiality classifier alone, but also to be significant contributors for computational tools identifying essential genes. (paper)

  18. How to model wireless mesh networks topology

    International Nuclear Information System (INIS)

    Sanni, M L; Hashim, A A; Anwar, F; Ali, S; Ahmed, G S M

    2013-01-01

    The specification of network connectivity model or topology is the beginning of design and analysis in Computer Network researches. Wireless Mesh Networks is an autonomic network that is dynamically self-organised, self-configured while the mesh nodes establish automatic connectivity with the adjacent nodes in the relay network of wireless backbone routers. Researches in Wireless Mesh Networks range from node deployment to internetworking issues with sensor, Internet and cellular networks. These researches require modelling of relationships and interactions among nodes including technical characteristics of the links while satisfying the architectural requirements of the physical network. However, the existing topology generators model geographic topologies which constitute different architectures, thus may not be suitable in Wireless Mesh Networks scenarios. The existing methods of topology generation are explored, analysed and parameters for their characterisation are identified. Furthermore, an algorithm for the design of Wireless Mesh Networks topology based on square grid model is proposed in this paper. The performance of the topology generated is also evaluated. This research is particularly important in the generation of a close-to-real topology for ensuring relevance of design to the intended network and validity of results obtained in Wireless Mesh Networks researches

  19. A Topological Extension of General Relativity to Explore the Nature of Quantum Space-Time, Dark Energy and Inflation

    NARCIS (Netherlands)

    Spaans, M.

    2013-01-01

    General Relativity is extended into the quantum domain. A thought experiment is ex- plored to derive a specific topological build-up for Planckian space-time. The presented arguments are inspired by Feynman’s path integral for superposition andWheeler’s quan- tum foam of Planck mass mini black

  20. Topological Gyroscopic Metamaterials

    Science.gov (United States)

    Nash, Lisa Michelle

    Topological materials are generally insulating in their bulk, with protected conducting states on their boundaries that are robust against disorder and perturbation of material property. The existence of these conducting edge states is characterized by an integer topological invariant. Though the phenomenon was first discovered in electronic systems, recent years have shown that topological states exist in classical systems as well. In this thesis we are primarily concerned with the topological properties of gyroscopic materials, which are created by coupling networks of fast-spinning objects. Through a series of simulations, numerical calculations, and experiments, we show that these materials can support topological edge states. We find that edge states in these gyroscopic metamaterials bear the hallmarks of topology related to broken time reversal symmetry: they transmit excitations unidirectionally and are extremely robust against experimental disorder. We also explore requirements for topology by studying several lattice configurations and find that topology emerges naturally in gyroscopic systems.A simple prescription can be used to create many gyroscopic lattices. Though many of our gyroscopic networks are periodic, we explore amorphous point-sets and find that topology also emerges in these networks.

  1. Interactive Topology Optimization

    DEFF Research Database (Denmark)

    Nobel-Jørgensen, Morten

    Interactivity is the continuous interaction between the user and the application to solve a task. Topology optimization is the optimization of structures in order to improve stiffness or other objectives. The goal of the thesis is to explore how topology optimization can be used in applications...... on theory of from human-computer interaction which is described in Chapter 2. Followed by a description of the foundations of topology optimization in Chapter 3. Our applications for topology optimization in 2D and 3D are described in Chapter 4 and a game which trains the human intuition of topology...... optimization is presented in Chapter 5. Topology optimization can also be used as an interactive modeling tool with local control which is presented in Chapter 6. Finally, Chapter 7 contains a summary of the findings and concludes the dissertation. Most of the presented applications of the thesis are available...

  2. Ordered groups and topology

    CERN Document Server

    Clay, Adam

    2016-01-01

    This book deals with the connections between topology and ordered groups. It begins with a self-contained introduction to orderable groups and from there explores the interactions between orderability and objects in low-dimensional topology, such as knot theory, braid groups, and 3-manifolds, as well as groups of homeomorphisms and other topological structures. The book also addresses recent applications of orderability in the studies of codimension-one foliations and Heegaard-Floer homology. The use of topological methods in proving algebraic results is another feature of the book. The book was written to serve both as a textbook for graduate students, containing many exercises, and as a reference for researchers in topology, algebra, and dynamical systems. A basic background in group theory and topology is the only prerequisite for the reader.

  3. Tourism and Arctic Observation Systems: exploring the relationships

    Directory of Open Access Journals (Sweden)

    Suzanne de la Barre

    2016-03-01

    Full Text Available The Arctic is affected by global environmental change and also by diverse interests from many economic sectors and industries. Over the last decade, various actors have attempted to explore the options for setting up integrated and comprehensive trans-boundary systems for monitoring and observing these impacts. These Arctic Observation Systems (AOS contribute to the planning, implementation, monitoring and evaluation of environmental change and responsible social and economic development in the Arctic. The aim of this article is to identify the two-way relationship between AOS and tourism. On the one hand, tourism activities account for diverse changes across a broad spectrum of impact fields. On the other hand, due to its multiple and diverse agents and far-reaching activities, tourism is also well-positioned to collect observational data and participate as an actor in monitoring activities. To accomplish our goals, we provide an inventory of tourism-embedded issues and concerns of interest to AOS from a range of destinations in the circumpolar Arctic region, including Alaska, Arctic Canada, Iceland, Svalbard, the mainland European Arctic and Russia. The article also draws comparisons with the situation in Antarctica. On the basis of a collective analysis provided by members of the International Polar Tourism Research Network from across the polar regions, we conclude that the potential role for tourism in the development and implementation of AOS is significant and has been overlooked.

  4. The relationship between the number of loci and the statistical support for the topology of UPGMA trees obtained from genetic distance data.

    Science.gov (United States)

    Highton, R

    1993-12-01

    An analysis of the relationship between the number of loci utilized in an electrophoretic study of genetic relationships and the statistical support for the topology of UPGMA trees is reported for two published data sets. These are Highton and Larson (Syst. Zool.28:579-599, 1979), an analysis of the relationships of 28 species of plethodonine salamanders, and Hedges (Syst. Zool., 35:1-21, 1986), a similar study of 30 taxa of Holarctic hylid frogs. As the number of loci increases, the statistical support for the topology at each node in UPGMA trees was determined by both the bootstrap and jackknife methods. The results show that the bootstrap and jackknife probabilities supporting the topology at some nodes of UPGMA trees increase as the number of loci utilized in a study is increased, as expected for nodes that have groupings that reflect phylogenetic relationships. The pattern of increase varies and is especially rapid in the case of groups with no close relatives. At nodes that likely do not represent correct phylogenetic relationships, the bootstrap probabilities do not increase and often decline with the addition of more loci.

  5. Lover and learner: Exploring relational schema change following relationship dissolution.

    Science.gov (United States)

    Brunson, Julie A; Øverup, Camilla S; Acitelli, Linda K

    2018-03-27

    Romantic relationships are known to be very influential, but less is known about how these relationships, and particularly the breakup of these relationships, may affect individuals' relational schemas, or their expectations for relationships. Undergraduate students reported on how their views of themselves, romantic partners, and relationships changed after breaking up with a past partner. Results suggest that relational schemas change following relationship dissolution and that there are both positive and negative aspects to this change. There was also some evidence that aspects of the past relationship predicted change and the valence of change, and that change and the valence of change were related to aspects of current relationship quality. These results are an important first step in understanding how past romantic relationships influence people's expectations about relationships and, by extension, their health and wellbeing.

  6. General topology

    CERN Document Server

    Willard, Stephen

    2004-01-01

    Among the best available reference introductions to general topology, this volume is appropriate for advanced undergraduate and beginning graduate students. Its treatment encompasses two broad areas of topology: ""continuous topology,"" represented by sections on convergence, compactness, metrization and complete metric spaces, uniform spaces, and function spaces; and ""geometric topology,"" covered by nine sections on connectivity properties, topological characterization theorems, and homotopy theory. Many standard spaces are introduced in the related problems that accompany each section (340

  7. Topological Acoustic Delay Line

    Science.gov (United States)

    Zhang, Zhiwang; Tian, Ye; Cheng, Ying; Wei, Qi; Liu, Xiaojun; Christensen, Johan

    2018-03-01

    Topological protected wave engineering in artificially structured media is at the frontier of ongoing metamaterials research that is inspired by quantum mechanics. Acoustic analogues of electronic topological insulators have recently led to a wealth of new opportunities in manipulating sound propagation with strikingly unconventional acoustic edge modes immune to backscattering. Earlier fabrications of topological insulators are characterized by an unreconfigurable geometry and a very narrow frequency response, which severely hinders the exploration and design of useful devices. Here we establish topologically protected sound in reconfigurable phononic crystals that can be switched on and off simply by rotating its three-legged "atoms" without altering the lattice structure. In particular, we engineer robust phase delay defects that take advantage of the ultrabroadband reflection-free sound propagation. Such topological delay lines serve as a paradigm in compact acoustic devices, interconnects, and electroacoustic integrated circuits.

  8. Exploring the Relationship between Modified Output and Working Memory Capacity

    Science.gov (United States)

    Mackey, Alison; Adams, Rebecca; Stafford, Catherine; Winke, Paula

    2010-01-01

    This study examines the relationship between learners' production of modified output and their working memory (WM) capacity. The task-based interactions of 42 college-level, native English-speaking learners of Spanish as a foreign language were examined. A relationship was found between learners' WM test scores and their tendency to modify output.…

  9. Stretching the Frontiers: Exploring the Relationships Between Entrepreneurship and Ethics

    NARCIS (Netherlands)

    Fisscher, O.A.M.; Frenkel, D.; Lurie, Y.; Nijhof, A.H.J.

    2005-01-01

    The relationship between entrepreneurship and ethics can be characterised as an intense love-hate relationship. On the one hand, entrepreneurs, who are regarded as creative innovators, are praised for their contribution to the development of society by creating new products, employment opportunities

  10. Exploring Pedagogical Relationships in the Context of Free Play

    Science.gov (United States)

    Hall-Kenyon, Kendra M.; Rosborough, Alessandro A.

    2017-01-01

    Early childhood advocates agree that positive teacher-child relationships are critical to classroom quality. Much research has emphasized quantifiable teacher characteristics and child outcomes without fully capturing the complexity of these relationships. Drawing on extensive classroom observations, two video-recorded free play sessions and…

  11. Modeling dynamics in career construction : reciprocal relationship between future work self and career exploration.

    OpenAIRE

    Guan, Y.; Zhuang, M.; Cai, Z.; Ding, Y.; Wang, Y.; Huang, Z.; Lai, X.

    2017-01-01

    In extant research, scholars have treated proactive career behavior (e.g., career exploration) primarily as a consequence of future work self. Yet, emerging evidence provides support for a relationship in the opposite direction, suggesting that career exploration may also be an antecedent. Using a cross-lagged panel design, we empirically tested the reciprocal relationship between future work self and career exploration. In Study 1, we measured both future work self and career exploration at ...

  12. Intuitionistic supra fuzzy topological spaces

    International Nuclear Information System (INIS)

    Abbas, S.E.

    2004-01-01

    In this paper, We introduce an intuitionistic supra fuzzy closure space and investigate the relationship between intuitionistic supra fuzzy topological spaces and intuitionistic supra fuzzy closure spaces. Moreover, we can obtain intuitionistic supra fuzzy topological space induced by an intuitionistic fuzzy bitopological space. We study the relationship between intuitionistic supra fuzzy closure space and the intuitionistic supra fuzzy topological space induced by an intuitionistic fuzzy bitopological space

  13. Ultrafilters and topologies on groups

    CERN Document Server

    Zelenyuk, Yevhen

    2011-01-01

    This book presents the relationship between ultrafilters and topologies on groups. It shows how ultrafilters are used in constructing topologies on groups with extremal properties and how topologies on groups serve in deriving algebraic results aboutultrafilters. Topics covered include: topological and left topological groups, ultrafilter semigroups, local homomorphisms and automorphisms, subgroups and ideal structure of ßG, almost maximal spaces and projectives of finite semigroups, resolvability of groups. This is a self-contained book aimed at graduate students and researchers working in to

  14. Exploring the Context Dependency of the PSM-Performance Relationship

    DEFF Research Database (Denmark)

    Lynggard, Mikkel; Pedersen, Mogens Jin; Andersen, Lotte Bøgh

    2016-01-01

    The public service motivation (PSM) of public employees matters to their performance at work. Yet research on how context factors moderate the PSM–performance relationship is sparse. This article shows how the PSM–performance relationship may depend on two context factors: (a) the extent of work...... autonomy that a public organization provides its employees and (b) the service users’ capacity to affect the organization’s service provision. We test a set of moderation hypotheses using school data (teacher survey data with administrative data on schools and student). Using within-student between......-teachers fixed effects regression, we find a stronger PSM–performance relationship in organizational contexts involving greater regulation of employee work autonomy for users with low to moderate user capacity....

  15. Exploring the relationship between caring, love and intimacy in nursing.

    Science.gov (United States)

    Dowling, Maura

    This article uses the five distinct perspectives on caring proposed by Morse et al (1990) to illustrate the relationship between love, intimacy and caring. Two distinct types of love, namely Agape (altruism/charity) and filia (brother love) are utilized in nursing. Only some caring relationships with patients reach an intimate level, and this is determined by patient characteristics to which the nurse responds. It is concluded that caring as a moral imperative is the most relevant to discussions on caring in nursing and the perspective on which the other four viewpoints hinge.

  16. Linking GeoGebra to Explorations of Linear Relationships

    Science.gov (United States)

    Aventi, Belinda; Serow, Penelope; Tobias, Steve

    2014-01-01

    Increasing pressure is mounting from all areas of society to maximise technology use within educational domains. Whilst curriculum documents call for the utilisation of technology as a teaching tool in the mathematics classroom, the benefits of exploring forms of dynamic mathematical software, such as GeoGebra, are often introduced in the senior…

  17. An Exploration of Boundaries and Solidarity in Counseling Relationships

    Science.gov (United States)

    Speight, Suzette L.

    2012-01-01

    This article explores the boundaries between clinicians and clients in light of the construct of solidarity. A universal conception of boundaries is critiqued and a culturally congruent view of boundaries is examined, rooted in the concept of solidarity. The article includes case illustrations of the connection between boundaries and solidarity…

  18. Tourism and Arctic Observation Systems: exploring the relationships

    NARCIS (Netherlands)

    Barre, de la Suzanne; Maher, Patrick; Dawson, Jackie; Hillmer-Pegram, Kevin; Huijbens, Edward; Lamers, M.A.J.; Liggett, D.; Müller, D.; Pashkevich, A.; Stewart, Emma

    2016-01-01

    The Arctic is affected by global environmental change and also by diverse interests from many economic sectors and industries. Over the last decade, various actors have attempted to explore the options for setting up integrated and comprehensive trans-boundary systems for monitoring and observing

  19. Exploring exercise behavior, intention and habit strength relationships

    NARCIS (Netherlands)

    de Bruijn, G.J.; Rhodes, R.E.

    2011-01-01

    The purpose of this study was to explore the relevance of integrating exercise habit strength within the framework of the theory of planned behavior. Data were obtained from 538 undergraduate students [mean age=21.19 (SD=2.57); 28.4% males] using validated questionnaires and analyzed using

  20. Exploring Educational Administration: The Relationship between Leadership and Management

    OpenAIRE

    Masitah Shahrill

    2014-01-01

    There have been many on-going debates on the agreement to the meaning of administration, leadership and management. This paper explores the distinctions between educational administration, educational leadership and educational management and what are entailed in terms of their differences and similarities in nature.

  1. Exploring the Relationship between Mathematical Modelling and Classroom Discourse

    Science.gov (United States)

    Redmond, Trevor; Sheehy, Joanne; Brown, Raymond

    2010-01-01

    This paper explores the notion that the discourse of the mathematics classroom impacts on the practices that students engage when modelling mathematics. Using excerpts of a Year 12 student's report on modelling Newton's law of cooling, this paper argues that when students engage with the discourse of their mathematics classroom in a manner that…

  2. Efficient Cultures: Exploring the Relationship between Culture and Organizational Performance.

    Science.gov (United States)

    Wilkins, Alan L.; Ouchi, William G.

    1983-01-01

    Arguing from a transaction costs perspective, this paper contends that local organizational cultures distinct from shared background cultures exist relatively infrequently. The relationship between local organizational culture and organizational efficiency is discussed, and it is concluded that changing organizations are more adaptive than is…

  3. Exploring the relationships among attachment, emotional intelligence and communication.

    Science.gov (United States)

    Cherry, M Gemma; Fletcher, Ian; O'Sullivan, Helen

    2013-03-01

    Attachment style has been shown to influence both emotional intelligence (EI) and the clinical communication of medical students and doctors. No research has assessed the relationships among attachment, EI and clinical communication in medical students. This study was conducted to evaluate the effect of EI on the relationship between medical students' attachment style and clinical communication. Medical students were invited to complete measures of attachment (using the Experiences in Close Relationships-Short Form [ECR-SF], a 12-item measure that provides attachment avoidance and attachment anxiety dimensional scores) and EI (using the Mayer-Salovey-Caruso Emotional Intelligence Test [MSCEIT], a 141-item measure of the perception, use, understanding and management of emotions) at the end of Year 1, prior to a summative objective structured clinical examination (OSCE). Clinical communication was assessed using OSCE scores. Structural equation modelling (SEM) was used to analyse a hypothetical model of the relationships among attachment style, EI and clinical communication. A total of 200 of 358 (55.9%) students participated. Attachment avoidance was significantly negatively correlated with total EI scores (r=-0.28, pcommunication. © Blackwell Publishing Ltd 2013.

  4. Topology-energy relationships and lowest energy configurations for pentagonal dodecahedral (H2O)20X clusters, X=empty, H2O, NH3, H3O+: The importance of O-topology

    Science.gov (United States)

    Anick, David J.

    2010-04-01

    For (H2O)20X water clusters consisting of X enclosed by the 512 dodecahedral cage, X=empty, H2O, NH3, and H3O+, databases are made consisting of 55-82 isomers optimized via B3LYP/6-311++G∗∗. Correlations are explored between ground state electronic energy (Ee) or electronic energy plus zero point energy (Ee+ZPE) and the clusters' topology, defined as the set of directed H-bonds. Linear regression is done to identify topological features that correlate with cluster energy. For each X, variables are found that account for 99% of the variance in Ee and predict it with a rms error under 0.2 kcal/mol. The method of analysis emphasizes the importance of an intermediate level of structure, the "O-topology," consisting of O-types and a list of O pairs that are bonded but omitting H-bond directions, as a device to organize the databases and reduce the number of structures one needs to consider. Relevant variables include three parameters, which count the number of H-bonds having particular donor and acceptor types; |M|2, where M is the cluster's vector dipole moment; and the projection of M onto the symmetry axis of X. Scatter diagrams for Ee or Ee+ZPE versus |M| show that clusters fall naturally into "families" defined by the values of certain discrete parameters, the "major parameters," for each X. Combining "family" analysis and O-topologies, a small group of clusters is identified for each X that are candidates to be the global minimum, and the minimum is determined. For X=H3O+, one cluster with central hydronium lies just 2.08 kcal/mol above the lowest isomer with surface hydronium. Implications of the methodology for dodecahedral (H2O)20(NH4+) and (H2O)20(NH4+)(OH-) are discussed, and new lower energy isomers are found. For MP2/TZVP, the lowest-energy (H2O)20(NH4+) isomer features a trifurcated H-bond. The results suggest a much more efficient and comprehensive way of seeking low-energy water cluster geometries that may have wide applicability.

  5. Exploring DBpedia and Wikipedia for Portuguese Semantic Relationship Extraction

    Directory of Open Access Journals (Sweden)

    David Soares Batista

    2013-07-01

    Full Text Available The identification of semantic relationships, as expressed between named entities in text, is an important step for extracting knowledge from large document collections, such as the Web. Previous works have addressed this task for the English language through supervised learning techniques for automatic classification. The current state of the art involves the use of learning methods based on string kernels. However, such approaches require manually annotated training data for each type of semantic relationship, and have scalability problems when tens or hundreds of different types of relationships have to be extracted. This article discusses an approach for distantly supervised relation extraction over texts written in the Portuguese language, which uses an efficient technique for measuring similarity between relation instances, based on minwise hashing and on locality sensitive hashing. In the proposed method, the training examples are automatically collected from Wikipedia, corresponding to sentences that express semantic relationships between pairs of entities extracted from DBPedia. These examples are represented as sets of character quadgrams and other representative elements. The sets are indexed in a data structure that implements the idea of locality-sensitive hashing. To check which semantic relationship is expressed between a given pair of entities referenced in a sentence, the most similar training examples are searched, based on an approximation to the Jaccard coefficient, obtained through min-hashing. The relation class is assigned with basis on the weighted votes of the most similar examples. Tests with a dataset from Wikipedia validate the suitability of the proposed method, showing, for instance, that the method is able to extract 10 different types of semantic relations, 8 of them corresponding to asymmetric relations, with an average score of 55.6%, measured in terms of F1.

  6. Topological insulators and topological superconductors

    CERN Document Server

    Bernevig, Andrei B

    2013-01-01

    This graduate-level textbook is the first pedagogical synthesis of the field of topological insulators and superconductors, one of the most exciting areas of research in condensed matter physics. Presenting the latest developments, while providing all the calculations necessary for a self-contained and complete description of the discipline, it is ideal for graduate students and researchers preparing to work in this area, and it will be an essential reference both within and outside the classroom. The book begins with simple concepts such as Berry phases, Dirac fermions, Hall conductance and its link to topology, and the Hofstadter problem of lattice electrons in a magnetic field. It moves on to explain topological phases of matter such as Chern insulators, two- and three-dimensional topological insulators, and Majorana p-wave wires. Additionally, the book covers zero modes on vortices in topological superconductors, time-reversal topological superconductors, and topological responses/field theory and topolo...

  7. Exploring the relationship between university internationalization and university autonomy

    DEFF Research Database (Denmark)

    Turcan, Romeo V.; Gullieva, Valeria

    This paper explores a research gap at the intersection of university internationalization and university autonomy. A process model of university internationalization is put forward whereby the process of university internationalization is mediated by university internationalization capacity...... and moderated by target country institutional autonomy and globalization; and entry modes, timing and pace, as well as product mix of internationalization define university’s internationalization pattern. A systematic review is conducted to identify empirical studies at this intersection. One of the questions...

  8. Exploring Familial Relationship Growth and Negotiation: A Case Study of Outward Bound Family Courses

    Science.gov (United States)

    Overholt, Jillisa R.

    2013-01-01

    This study explored the phenomenon of father-child relationship development within the context of an Outward Bound (OB) family course, an environment that may both disrupt the ordinary aspects of an established relationship, and provide activities to purposefully encourage relationship development through a variety of aspects inherent to the…

  9. Sparking connections: An exploration of adolescent girls' relationships with science

    Science.gov (United States)

    Wheeler, Kathryn A.

    Despite progress in narrowing the gender gap, fewer women than men pursue science careers. Adolescence is a critical age when girls' science interest is sparked or smothered. Prior research provides data on who drops out of the "science pipeline" and when, but few studies examine why and how girls disconnect from science. This thesis is an in-depth exploratory study of adolescent girls' relationships with science based on a series of interviews with four middle-class Caucasian girls---two from public schools, two homeschooled. The girls' stones about their experiences with, feelings about, and perspectives on science, the science process, and their science learning environments are examined with a theoretical and analytic approach grounded in relational psychology. The potential link between girls' voices and their involvement in science is investigated. Results indicate that girls' relationships with science are multitiered. Science is engaging and familiar in the sense that girls are curious about the world, enjoy learning about scientific phenomena, and informally use science in their everyday fives. However, the girls in this study differentiated between the science they do and the field of science, which they view as a mostly male endeavor (often despite real life experiences to the contrary) that uses rather rigid methods to investigate questions of limited scope and interest. In essence, how these girls defined science defined their relationship with science: those with narrow conceptions of science felt distant from it. Adolescent girls' decreased involvement in science activities may be a relational act---a move away from a patriarchical process, pedagogy, and institution that does not resonate with their experiences, questions, and learning styles. Girls often feel like outsiders to science; they resist considering science careers when they have concerns that implicitly or explicitly, doing so would involve sacrificing their knowledge, creativity, or

  10. Coopetition and Complexity : Exploring a Coopetitive Relationship with Complexity

    OpenAIRE

    Wennberg, Andreas; Persson, Emil

    2011-01-01

    Cooperation have in previous research been seen as a negative impact on competition and  vice versa. This thesis is building on a concept called coopetition in which cooperation and  competition is studied simultaneously. Coopetition have been studied in terms of the level of  cooperation and competition. However, we found a possible link between coopetition and  complexity in previous literature. Thus, the purpose of this study is to explore whether  complexity can develop an understanding f...

  11. Beginning topology

    CERN Document Server

    Goodman, Sue E

    2009-01-01

    Beginning Topology is designed to give undergraduate students a broad notion of the scope of topology in areas of point-set, geometric, combinatorial, differential, and algebraic topology, including an introduction to knot theory. A primary goal is to expose students to some recent research and to get them actively involved in learning. Exercises and open-ended projects are placed throughout the text, making it adaptable to seminar-style classes. The book starts with a chapter introducing the basic concepts of point-set topology, with examples chosen to captivate students' imaginations while i

  12. Exploring the relationship between population density and maternal health coverage

    Directory of Open Access Journals (Sweden)

    Hanlon Michael

    2012-11-01

    Full Text Available Abstract Background Delivering health services to dense populations is more practical than to dispersed populations, other factors constant. This engenders the hypothesis that population density positively affects coverage rates of health services. This hypothesis has been tested indirectly for some services at a local level, but not at a national level. Methods We use cross-sectional data to conduct cross-country, OLS regressions at the national level to estimate the relationship between population density and maternal health coverage. We separately estimate the effect of two measures of density on three population-level coverage rates (6 tests in total. Our coverage indicators are the fraction of the maternal population completing four antenatal care visits and the utilization rates of both skilled birth attendants and in-facility delivery. The first density metric we use is the percentage of a population living in an urban area. The second metric, which we denote as a density score, is a relative ranking of countries by population density. The score’s calculation discounts a nation’s uninhabited territory under the assumption those areas are irrelevant to service delivery. Results We find significantly positive relationships between our maternal health indicators and density measures. On average, a one-unit increase in our density score is equivalent to a 0.2% increase in coverage rates. Conclusions Countries with dispersed populations face higher burdens to achieve multinational coverage targets such as the United Nations’ Millennial Development Goals.

  13. Topological Taxonomy of Water Distribution Networks

    Directory of Open Access Journals (Sweden)

    Carlo Giudicianni

    2018-04-01

    Full Text Available Water Distribution Networks (WDNs can be regarded as complex networks and modeled as graphs. In this paper, Complex Network Theory is applied to characterize the behavior of WDNs from a topological point of view, reviewing some basic metrics, exploring their fundamental properties and the relationship between them. The crucial aim is to understand and describe the topology of WDNs and their structural organization to provide a novel tool of analysis which could help to find new solutions to several arduous problems of WDNs. The aim is to understand the role of the topological structure in the WDNs functioning. The methodology is applied to 21 existing networks and 13 literature networks. The comparison highlights some topological peculiarities and the possibility to define a set of best design parameters for ex-novo WDNs that could also be used to build hypothetical benchmark networks retaining the typical structure of real WDNs. Two well-known types of network ((a square grid; and (b random graph are used for comparison, aiming at defining a possible mathematical model for WDNs. Finally, the interplay between topology and some performance requirements of WDNs is discussed.

  14. Relationship between cynicism and job satisfaction: exploration of mechanisms.

    Science.gov (United States)

    Srivastava, Abhishek; Adams, John W

    2011-02-01

    Personality traits related to evaluation of other people and the world are important to study in relation to job satisfaction, which itself is an evaluation of various facets of a job, including the social dimensions. Accordingly, the relationship between cynicism and job satisfaction was studied. Cynicism was expected to be negatively related to job satisfaction, employees' perceptions of job enrichment, quality of leader-member exchange, and support from coworkers. Survey data from 105 employees in a diverse set of organizations (M age = 48 yr.; 50% women; M work experience = 28 yr.; 73% had >16 yr. education) were subjected to hierarchical regression. Individuals high in Cynicism were likely to have lower job satisfaction, job enrichment, quality of leader-member exchange, and perceptions of co-worker support.

  15. Exploring Relationships: Teacher Characteristics and Student Learning in Physical Science

    Science.gov (United States)

    Close, Eleanor; Vokos, S.; Seeley, L.

    2006-12-01

    The Department of Physics and the School of Education at Seattle Pacific University, together with FACET Innovations, LLC, are beginning the second year of a five-year NSF TPC grant, Improving the Effectiveness of Teacher Diagnostic Skills and Tools. We are working in partnership with school districts in Washington State to identify and characterize widespread productive and unproductive modes of reasoning employed by both pre-college students and teachers on foundational topics in physical science. In the first year of the grant, base-line preand post-test data were collected from a large number (N 2300) of middle and high school students. We will discuss relationships between preand post-test results, student learning gains, and student and teacher characteristics. * Supported in part by NSF grant #ESI-0455796, The Boeing Corporation, and the SPU Science Initiative.

  16. Exploring the relationship between hope and burnout in competitive sport.

    Science.gov (United States)

    Gustafsson, Henrik; Hassmén, Peter; Podlog, Leslie

    2010-12-01

    Researchers have postulated that hope may be an important factor associated with burnout. Consistent with hope theory contentions, low-hope individuals may be susceptible to burnout because they are prone to experience goal blockage, frustration, and negative affect, all of which likely increase the risk of burnout. We examined the relationship between hope and athlete burnout among 178 competitive athletes (63 females and 115 males) aged 15-20 years. Hope was significantly and negatively correlated with all three burnout subscales: emotional/physical exhaustion, a reduced sense of accomplishment, and sport devaluation. Moreover, results of a multivariate analysis of variance showed that low-hope athletes scored significantly higher than medium- and high-hope athletes on all three burnout dimensions. Finally, results revealed that agency thinking was a significant predictor of all burnout dimensions. Frustration over unmet goals and a perceived lack of agency, a characteristic of low-hope athletes, might pose a risk factor in athlete burnout, whereas being able to maintain hope appears to be associated with health and well-being.

  17. Emergency management and homeland security: Exploring the relationship.

    Science.gov (United States)

    Kahan, Jerome H

    2015-01-01

    In the years after the 9/11 tragedy, the United States continues to face risks from all forms of major disasters, from potentially dangerous terrorist attacks to catastrophic acts of nature. Professionals in the fields of emergency management and homeland security have responsibilities for ensuring that all levels of government, urban areas and communities, nongovernmental organizations, businesses, and individual citizens are prepared to deal with such hazards though actions that reduce risks to lives and property. Regrettably, the overall efficiency and effectiveness of the nation's ability to deal with disasters is unnecessarily challenged by the absence of a common understanding on how these fields are related in the workforce and educational arenas. Complicating matters further is the fact that neither of these fields has developed agreed definitions. In many ways, homeland security and emergency management have come to represent two different worlds and cultures. These conditions can have a deleterious effect on preparedness planning for public and private stakeholders across the nation when coordinated responses among federal, state, and local activities are essential for dealing with consequential hazards. This article demonstrates that the fields of emergency management and homeland security share many responsibilities but are not identical in scope or skills. It argues that emergency management should be considered a critical subset of the far broader and more strategic field of homeland security. From analytically based conclusions, it recommends five steps that be taken to bring these fields closer together to benefit more from their synergist relationship as well as from their individual contributions.

  18. Topology control

    NARCIS (Netherlands)

    Buchin, K.; Buchin, M.; Wagner, D.; Wattenhofer, R.

    2007-01-01

    Information between two nodes in a network is sent based on the network topology, the structure of links connecting pairs of nodes of a network. The task of topology control is to choose a connecting subset from all possible links such that the overall network performance is good. For instance, a

  19. Do Social Ties Affect Our Health? Exploring the Biology of Relationships

    Science.gov (United States)

    ... Do Social Ties Affect Our Health? Exploring the Biology of Relationships En español Send us your comments ... neighbors, or others, social connections can influence our biology and well-being. Wide-ranging research suggests that ...

  20. Exploring Peer Relationships, Friendships and Group Work Dynamics in Higher Education: Applying Social Network Analysis

    Science.gov (United States)

    Mamas, Christoforos

    2018-01-01

    This study primarily applied social network analysis (SNA) to explore the relationship between friendships, peer social interactions and group work dynamics within a higher education undergraduate programme in England. A critical case study design was adopted so as to allow for an in-depth exploration of the students' voice. In doing so, the views…

  1. The Mediation Effects of Career Exploration on the Relationship between Trait Anxiety and Career Indecision

    Science.gov (United States)

    Park, Kira; Woo, Sungbum; Park, Kibok; Kyea, Jina; Yang, Eunjoo

    2017-01-01

    This study investigated trait anxiety, career exploration behaviors, and career indecision. Using longitudinal data, career exploration behavior was examined as a mediator in the relationship between trait anxiety and career indecision. Five hundred and one Korean college students completed online questionnaires at three different time points with…

  2. An Exploration of Self-Efficacy among Novice Nursing Faculty in Formal Mentoring Relationships

    Science.gov (United States)

    Greenwood, Lisa Marie

    2017-01-01

    This qualitative study explored the lived experiences of novice nursing faculty members at one Midwestern Technical college, who were in formal mentoring relationships with seasoned nursing faculty members. A total of nine faculty members participated in a single, sixty minute, semi-structured interview exploring the lived experiences of being…

  3. Exploring the Relationship of Exit Flow and Jam Density in Panic Scenarios Using Animal Dynamics

    NARCIS (Netherlands)

    Sobhani, A.; Sarvi, M.; Duives, D.C.; Ejtemai, O.; Aghabayk, K.; Hoogendoorn, S.P.

    2014-01-01

    There are few studies investigating crowd dynamics in panic situations. They used measures such as exit flow rate to explore the exit performance in evacuation scenarios. However, there is limited research exploring the relationship of exit flow rate and density behind the exit for panic scenarios.

  4. Exploring the relationship between outdoor recreation activities, community participation, and environmental attitudes

    Science.gov (United States)

    Lindsey Barker; Chad Dawson

    2012-01-01

    The relationship between environmental attitudes (EA) and environmentally responsible behavior (ERB) has been the focus of several studies in environmental psychology and recreation research. The purpose of this study was to explore the relationship between EAs and ERBs at both a general level and at an activity-specific level using a 2009 survey of motorized...

  5. Toric topology

    CERN Document Server

    Buchstaber, Victor M

    2015-01-01

    This book is about toric topology, a new area of mathematics that emerged at the end of the 1990s on the border of equivariant topology, algebraic and symplectic geometry, combinatorics, and commutative algebra. It has quickly grown into a very active area with many links to other areas of mathematics, and continues to attract experts from different fields. The key players in toric topology are moment-angle manifolds, a class of manifolds with torus actions defined in combinatorial terms. Construction of moment-angle manifolds relates to combinatorial geometry and algebraic geometry of toric v

  6. Conjoining international marketing and relationship marketing: Exploring consumers' cross-border service relationships

    NARCIS (Netherlands)

    Nijssen, E.J.; van Herk, H.

    2009-01-01

    Research on international marketing constructs, such as consumer ethnocentrism and country-of-origin effects, typically focuses on consumers' initial evaluations of foreign products but ignores consumers' emerging cross-border exchange relationships with foreign service providers. The influence of

  7. Conjoining international marketing and relationship marketing : exploring consumers' cross-border service relationships

    NARCIS (Netherlands)

    Nijssen, E.J.; Herk, van H.

    2009-01-01

    Research on international marketing constructs, such as consumer ethnocentrism and country-of-origin effects, typically focuses on consumers' initial evaluations of foreign products but ignores consumers' emerging cross-border exchange relationships with foreign service providers. The influence of

  8. Topological Acoustics

    Science.gov (United States)

    Yang, Zhaoju; Gao, Fei; Shi, Xihang; Lin, Xiao; Gao, Zhen; Chong, Yidong; Zhang, Baile

    2015-03-01

    The manipulation of acoustic wave propagation in fluids has numerous applications, including some in everyday life. Acoustic technologies frequently develop in tandem with optics, using shared concepts such as waveguiding and metamedia. It is thus noteworthy that an entirely novel class of electromagnetic waves, known as "topological edge states," has recently been demonstrated. These are inspired by the electronic edge states occurring in topological insulators, and possess a striking and technologically promising property: the ability to travel in a single direction along a surface without backscattering, regardless of the existence of defects or disorder. Here, we develop an analogous theory of topological fluid acoustics, and propose a scheme for realizing topological edge states in an acoustic structure containing circulating fluids. The phenomenon of disorder-free one-way sound propagation, which does not occur in ordinary acoustic devices, may have novel applications for acoustic isolators, modulators, and transducers.

  9. Topology Based Domain Search (TBDS)

    National Research Council Canada - National Science Library

    Manning, William

    2002-01-01

    This effort will explore radical changes in the way Domain Name System (DNS) is used by endpoints in a network to improve the resilience of the endpoint and its applications in the face of dynamically changing infrastructure topology...

  10. Mental Toughness in Education: Exploring Relationships with Attainment, Attendance, Behaviour and Peer Relationships

    Science.gov (United States)

    St Clair-Thompson, Helen; Bugler, Myfanwy; Robinson, Jamey; Clough, Peter; McGeown, Sarah P.; Perry, John

    2015-01-01

    Mental toughness has frequently been associated with successful performance in sport; however, recent research suggests that it may also be related to academic performance in Higher Education. In a series of three exploratory studies, we examined the relationship between mental toughness and different aspects of educational performance in…

  11. Exploring the link between relationship quality and loyalty: Gaining Insights into Manufacturer-Supplier Relationships

    OpenAIRE

    Lemke, Fred

    2003-01-01

    Manufacturers across industry sectors are gradually reducing their supplier base. Consequently, suppliers need an appropriate strategy to ensure preferred supplier status. It is argued, that `softer' - or more intangible - relationship factors potentially have the power to distinguish suppliers. But what are the intangible factors? How does a customer value them? Do they have an impact on the supplier selection process at all? Questions like these describe an area that ha...

  12. Cosmic Topology

    Science.gov (United States)

    Luminet, Jean-Pierre

    2015-08-01

    Cosmic Topology is the name given to the study of the overall shape of the universe, which involves both global topological features and more local geometrical properties such as curvature. Whether space is finite or infinite, simply-connected or multi-connected like a torus, smaller or greater than the portion of the universe that we can directly observe, are questions that refer to topology rather than curvature. A striking feature of some relativistic, multi-connected "small" universe models is to create multiples images of faraway cosmic sources. While the most recent cosmological data fit the simplest model of a zero-curvature, infinite space model, they are also consistent with compact topologies of the three homogeneous and isotropic geometries of constant curvature, such as, for instance, the spherical Poincaré Dodecahedral Space, the flat hypertorus or the hyperbolic Picard horn. After a "dark age" period, the field of Cosmic Topology has recently become one of the major concerns in cosmology, not only for theorists but also for observational astronomers, leaving open a number of unsolved issues.

  13. Ethical stakeholder engagement: Exploring the relationship between corporations and NGOs in Thailand, Romania, and the UK

    OpenAIRE

    Grigore, Georgiana; Theofilou, Anastasios; Watson, Tom; Sthapitanonda, P.

    2015-01-01

    The under-theorised field of ethical stakeholder engagement is explored in a three-country study of business-NGO relationships. The influence of the relationships upon the formation of corporate social responsibility (CSR) practice and theory is considered through discussion of stakeholder theory and ethical stakeholder engagement and the practices of business-NGO linkages in Romania, Thailand and the United Kingdom. The study applied a qualitative approach with 32 in-depth interviews with se...

  14. Exploring the Relationship between Annotation Use of EFL Learners and Their Learning Styles

    OpenAIRE

    Şakar, Asım

    2015-01-01

    This study explores the relationship between (perceptual and cognitive) learning styles and the use of hypermedia annotations by intermediate EFL learners while reading a hypermedia text. The participants were 44 EFL adult learners studying English for academic purposes. Data were collected through a software tracking tool, a learning styles survey and interviews. Results did not indicate a significant relationship, suggesting that learners with different learning styles had similar patterns ...

  15. Exploring the Relationship between Task Conflict,Relationship Conflict, Organizational Commitment

    Directory of Open Access Journals (Sweden)

    Heather Mills

    2009-01-01

    Full Text Available In the Australia, Canada, parts of Europe, and the United Kingdom, the provision of sport has had a long tradition of reliance on volunteers. However, there has been increasing pressure for voluntary sport organizations (VSOs to adopt more “professional” practices and operational procedures. Consequently, there is a tendency for volunteer organizations to adopt approaches to management developed in other industry contexts without giving proper thought to the differences in character of the public, private, and volunteer sector. It is in situations such as this that inappropriate practices are adopted and conflict emerges. Despite this,there has been limited research into conflict in volunteer sport organizations in the UK. The results of the study demonstrated that relationship conflict was related to both organizational commitment and satisfaction; however, task conflict was only related to job satisfaction. Perhaps the more important finding is the absence of a relationship between task conflict and organizational commitment. It is possible that individuals in VSOs saw their commitment to something greater than the club or association (i.e. the sport or some idealist notion of sport and were therefore likely to ‘put up’ with high levels of dissatisfaction associated with poor management

  16. Relational topology

    CERN Document Server

    Schmidt, Gunther

    2018-01-01

    This book introduces and develops new algebraic methods to work with relations, often conceived as Boolean matrices, and applies them to topology. Although these objects mirror the matrices that appear throughout mathematics, numerics, statistics, engineering, and elsewhere, the methods used to work with them are much less well known. In addition to their purely topological applications, the volume also details how the techniques may be successfully applied to spatial reasoning and to logics of computer science. Topologists will find several familiar concepts presented in a concise and algebraically manipulable form which is far more condensed than usual, but visualized via represented relations and thus readily graspable. This approach also offers the possibility of handling topological problems using proof assistants.

  17. Topology Optimization

    DEFF Research Database (Denmark)

    A. Kristensen, Anders Schmidt; Damkilde, Lars

    2007-01-01

    . A way to solve the initial design problem namely finding a form can be solved by so-called topology optimization. The idea is to define a design region and an amount of material. The loads and supports are also fidefined, and the algorithm finds the optimal material distribution. The objective function...... dictates the form, and the designer can choose e.g. maximum stiness, maximum allowable stresses or maximum lowest eigenfrequency. The result of the topology optimization is a relatively coarse map of material layout. This design can be transferred to a CAD system and given the necessary geometrically...... refinements, and then remeshed and reanalysed in other to secure that the design requirements are met correctly. The output of standard topology optimization has seldom well-defined, sharp contours leaving the designer with a tedious interpretation, which often results in less optimal structures. In the paper...

  18. Pseudoperiodic topology

    CERN Document Server

    Arnold, Vladimir; Zorich, Anton

    1999-01-01

    This volume offers an account of the present state of the art in pseudoperiodic topology-a young branch of mathematics, born at the boundary between the ergodic theory of dynamical systems, topology, and number theory. Related topics include the theory of algorithms, convex integer polyhedra, Morse inequalities, real algebraic geometry, statistical physics, and algebraic number theory. The book contains many new results. Most of the articles contain brief surveys on the topics, making the volume accessible to a broad audience. From the Preface by V.I. Arnold: "The authors … have done much to s

  19. Topological rings

    CERN Document Server

    Warner, S

    1993-01-01

    This text brings the reader to the frontiers of current research in topological rings. The exercises illustrate many results and theorems while a comprehensive bibliography is also included. The book is aimed at those readers acquainted with some very basic point-set topology and algebra, as normally presented in semester courses at the beginning graduate level or even at the advanced undergraduate level. Familiarity with Hausdorff, metric, compact and locally compact spaces and basic properties of continuous functions, also with groups, rings, fields, vector spaces and modules, and with Zorn''s Lemma, is also expected.

  20. Exploring the Relationship between Writing Apprehension and Writing Performance: A Qualitative Study

    Science.gov (United States)

    Badrasawi, Kamal J. I.; Zubairi, Ainol; Idrus, Faizah

    2016-01-01

    Writing skill is seen as a cornerstone of university students' success in both academic and career life. This qualitative study was conducted to further explore the teachers' and students' perceptions on the relationship between writing apprehension and writing performance, contributing factors of writing apprehension, and strategies to reduce…

  1. An Exploration of Relationships between Leadership and Student Citizenship Outcomes in Cyprus Middle Schools

    Science.gov (United States)

    Savvides, Vassos; Pashiardis, Petros

    2016-01-01

    Purpose: The main purpose of this study was to explore direct and indirect relationships between Leadership and Student Citizenship Outcomes in Cyprus middle schools. In the case of indirect effects the mediating role of School Academic Optimism and Instructional Quality was examined. Method: The specific study adopted a value-added quantitative…

  2. Meaningful Understanding and Systems Thinking in Organic Chemistry: Validating Measurement and Exploring Relationships

    Science.gov (United States)

    Vachliotis, Theodoros; Salta, Katerina; Tzougraki, Chryssa

    2014-01-01

    The purpose of this study was dual: First, to develop and validate assessment schemes for assessing 11th grade students' meaningful understanding of organic chemistry concepts, as well as their systems thinking skills in the domain. Second, to explore the relationship between the two constructs of interest based on students' performance…

  3. Guides to Sustainable Connections? Exploring Human-Nature Relationships among Wilderness Travel Leaders

    Science.gov (United States)

    Grimwood, Bryan S. R.; Haberer, Alexa; Legault, Maria

    2015-01-01

    This paper explores and critically interprets the role wilderness travel may play in fostering environmental sustainability. The paper draws upon two qualitative studies that sought to understand human-nature relationships as experienced by different groups of wilderness travel leaders in Canada. According to leaders involved in the studies,…

  4. Exploring the Relationship between Gestural Recognition and Imitation: Evidence of Dyspraxia in Autism Spectrum Disorders

    Science.gov (United States)

    Ham, Heidi Stieglitz; Bartolo, Angela; Corley, Martin; Rajendran, Gnanathusharan; Szabo, Aniko; Swanson, Sara

    2011-01-01

    In this study, the relationship between gesture recognition and imitation was explored. Nineteen individuals with Autism Spectrum Disorder (ASD) were compared to a control group of 23 typically developing children on their ability to imitate and recognize three gesture types (transitive, intransitive, and pantomimes). The ASD group performed more…

  5. An Exploration of the Relationship between the Use of Methamphetamine and Prescription Drugs

    Science.gov (United States)

    Lamonica, Aukje K.; Boeri, Miriam

    2012-01-01

    This study examines patterns of use of prescription drugs and methamphetamine. We drew our sample from a study about 130 active and inactive methamphetamine users and focused on 16 participants with a recent history of methamphetamine and prescription drug use. We collected in-depth interviews to explore relationships in use trajectory patterns.…

  6. Exploring the Relationship between Academic Dishonesty and Moral Development in Law School Students

    Science.gov (United States)

    Edmondson, Macey Lynd

    2013-01-01

    This mixed methods study explored whether a relationship existed between moral development and dishonest academic behaviors in law students. The quantitative portion of the study utilized a survey adapted from James Rest's Defining Issues Test and Donald McCabe's Academic Integrity Survey. Law students were solicited by email from two public…

  7. Exploring the Relationship between School Principals' Burnout Situation and Life Satisfaction

    Science.gov (United States)

    Karakose, Turgut; Kocabas, Ibrahim; Yirci, Ramazan; Esen, Coskun; Celik, Mustafa

    2016-01-01

    The purpose of this study is to explore school administrations' burnout situation and life satisfaction levels and the relationship between burnout and life satisfaction. The study was designed with the screening model. The research sample consists of 92 school principals and vice principals. Research data was collected with "Maslach Burnout…

  8. Exploring the Relationships between Principals' Life Experiences and Transformational Leadership Behaviours

    Science.gov (United States)

    Nash, Steve; Bangert, Art

    2014-01-01

    The primary objective of this research study was to explore the relationships between principals' life experiences and their transformational leadership behaviours. Over 212 public school principals completed both the lifetime leadership inventory (LLI) and the multifactor leadership questionnaire (MLQ). Exploratory and confirmatory factor…

  9. In the Public Eye: Swedish School Inspection and Local Newspapers: Exploring the Audit-Media Relationship

    Science.gov (United States)

    Ronnberg, Linda; Lindgren, Joakim; Segerholm, Christina

    2013-01-01

    This paper focuses on the dual dependencies apparent at the intersection of the media society and the audit society by empirically exploring and discussing the relationship between Swedish local newspaper coverage and school inspection activities. The research questions pertain to the Inspectorate's media strategy, how inspection is represented…

  10. The Historical Development of Vaccine Technology: Exploring the Relationship between Science and Technology

    Science.gov (United States)

    Lee, Yeung Chung; Kwok, Ping Wai

    2017-01-01

    This paper examines the feasibility of using historical case studies to contextualise the learning of the nature of science and technology in a biology lesson. Through exploring the historical development of vaccine technology, students were expected to understand the complexity of the relationships between technology and science beyond the…

  11. Brief Report: Exploring the Relationship between Sensory Processing and Repetitive Behaviours in Williams Syndrome

    Science.gov (United States)

    Riby, Deborah M.; Janes, Emily; Rodgers, Jacqui

    2013-01-01

    This study explored the relationship between sensory processing abnormalities and repetitive behaviours in children with Williams Syndrome (WS; n = 21). This is a novel investigation bringing together two clinical phenomena for the first time in this neuro-developmental disorder. Parents completed the Sensory Profile (Short Form; Dunn in The…

  12. ALGEBRAIC TOPOLOGY

    Indian Academy of Sciences (India)

    tion - 6. How Architectural Features Affect. Building During Earthquakes? C VRMurty. 48 Turbulence and Dispersion. K 5 Gandhi. BOOK REVIEWS. 86 Algebraic Topology. Siddhartha Gadgil. Front Cover. - .. ..-.......... -. Back Cover. Two-dimensional vertical section through a turbulent plume. (Courtesy: G S Shat, CAOS, IISc.).

  13. Topology optimization

    DEFF Research Database (Denmark)

    Bendsøe, Martin P.; Sigmund, Ole

    2007-01-01

    Taking as a starting point a design case for a compliant mechanism (a force inverter), the fundamental elements of topology optimization are described. The basis for the developments is a FEM format for this design problem and emphasis is given to the parameterization of design as a raster image...

  14. The capacity for romantic intimacy: exploring the contribution of best friend and marital and parental relationships.

    Science.gov (United States)

    Scharf, M; Mayseless, O

    2001-06-01

    This study examined, in a longitudinal design, the contributions of three different relationships, namely marital, parent-child and best friend, to the capacity for intimacy in romantic relationships of Israeli male adolescents, as well as the mediating role of socio-emotional capacities. Eighty-four 17-year-old adolescents and their parents filled out questionnaires concerning the quality of these relational contexts. Four years later the Intimacy Status Interview was administered to the adolescents at the conclusion of their mandatory military service to examine closeness, separateness, and commitment within their romantic relationships. Results showed that all relational contexts were related to capacity for intimacy (directly or indirectly), with higher relational qualities associated with better capability for intimacy. The marital relationship was associated with intimacy through its effect on the parent-child relationships. The effects of the parent-child relationships on the capacity for intimacy were mediated through the adolescents' socio-emotional capabilities. The contribution of the parent-adolescent relationships to the capacity for closeness and commitment was further mediated through relationships with the best friend, whereas the contribution to the capacity for separateness was not. A substantial number of our participants showed high capability for intimacy although in the military service context the circumstances for the development of intimacy were quite limited and non-optimal. Exploration of the separateness and closeness facets of intimacy in romantic relationships in the two sexes and in other contexts is recommended. Copyright 2001 The Association for Professionals in Services for Adolescents.

  15. Exploring reforms while learning to teach science: Facilitating exploration of theory-practice relationships in a teacher education study group

    Science.gov (United States)

    Foster, Jacob G.

    This dissertation inserts a new view into an old problem in teacher education. The study explores the theory-practice gap, the large distance between what preservice science teachers experience in schools, are able to enact, and are told they should hold themselves to in their practice. It does so by narrowing the focus of analysis to a secondary science study group and examining how the facilitator uses sociocultural constructivism to promote discussion. The analysis surfaces key communicative moves made by the facilitator and preservice teachers that yield fruitful discussion of theory-practice relationships. Additionally, the study's use of discourse analysis as a methodology and intertextuality as a conceptual framework opens new directions for applied sociolinguistic research and scholarship in science teacher education. Findings from the study focus on what was discussed and how explorations of theory-practice relationships were facilitated. Preservice teachers in the study group engaged in meaningful conversations about constructivist theory and its application to their students and teaching of science. They discussed many science education topics such as planning science lessons that actively engage students, assessment of content understanding, and management of content-based activities. Discussions of broader science education goals, including implementation of inquiry or development of collaborative communities, were not promoted. Examination of the facilitation illuminates a number of strategies found to be helpful in supporting these explorations. This study shows that facilitation can successfully support preservice teachers to construct understanding of social constructivist assumptions underlying the National Science Education Standards (NSES), as well as a few components of the Standards themselves. The focus on the underlying assumptions suggests that science teacher education should focus on these so that preservice teachers can build a strong

  16. Topology Optimization of Nanophotonic Devices

    DEFF Research Database (Denmark)

    Yang, Lirong

    This thesis explores the various aspects of utilizing topology optimization in designing nanophotonic devices. Either frequency-domain or time-domain methods is used in combination with the optimization algorithms, depending on various aims of the designing problems. The frequency-domain methods...... lengthscale and flexible pulse delay are addressed to demonstrate time-domain based topology optimization’s potential in designing complicated photonic structures with specifications on the time characteristics of pulses....

  17. Homotopical topology

    CERN Document Server

    Fomenko, Anatoly

    2016-01-01

    This classic text of the renowned Moscow mathematical school equips the aspiring mathematician with a solid grounding in the core of topology, from a homotopical perspective. Its comprehensiveness and depth of treatment are unmatched among topology textbooks: in addition to covering the basics—the fundamental notions and constructions of homotopy theory, covering spaces and the fundamental group, CW complexes, homology and cohomology, homological algebra—the book treats essential advanced topics, such as obstruction theory, characteristic classes, Steenrod squares, K-theory and cobordism theory, and, with distinctive thoroughness and lucidity, spectral sequences. The organization of the material around the major achievements of the golden era of topology—the Adams conjecture, Bott periodicity, the Hirzebruch–Riemann–Roch theorem, the Atiyah–Singer index theorem, to name a few—paints a clear picture of the canon of the subject. Grassmannians, loop spaces, and classical groups play a central role ...

  18. Rendering the Topological Spines

    Energy Technology Data Exchange (ETDEWEB)

    Nieves-Rivera, D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2015-05-05

    Many tools to analyze and represent high dimensional data already exits yet most of them are not flexible, informative and intuitive enough to help the scientists make the corresponding analysis and predictions, understand the structure and complexity of scientific data, get a complete picture of it and explore a greater number of hypotheses. With this in mind, N-Dimensional Data Analysis and Visualization (ND²AV) is being developed to serve as an interactive visual analysis platform with the purpose of coupling together a number of these existing tools that range from statistics, machine learning, and data mining, with new techniques, in particular with new visualization approaches. My task is to create the rendering and implementation of a new concept called topological spines in order to extend ND²AV's scope. Other existing visualization tools create a representation preserving either the topological properties or the structural (geometric) ones because it is challenging to preserve them both simultaneously. Overcoming such challenge by creating a balance in between them, the topological spines are introduced as a new approach that aims to preserve them both. Its render using OpenGL and C++ and is currently being tested to further on be implemented on ND²AV. In this paper I will present what are the Topological Spines and how they are rendered.

  19. Circuit topology of self-interacting chains: implications for folding and unfolding dynamics.

    Science.gov (United States)

    Mugler, Andrew; Tans, Sander J; Mashaghi, Alireza

    2014-11-07

    Understanding the relationship between molecular structure and folding is a central problem in disciplines ranging from biology to polymer physics and DNA origami. Topology can be a powerful tool to address this question. For a folded linear chain, the arrangement of intra-chain contacts is a topological property because rearranging the contacts requires discontinuous deformations. Conversely, the topology is preserved when continuously stretching the chain while maintaining the contact arrangement. Here we investigate how the folding and unfolding of linear chains with binary contacts is guided by the topology of contact arrangements. We formalize the topology by describing the relations between any two contacts in the structure, which for a linear chain can either be in parallel, in series, or crossing each other. We show that even when other determinants of folding rate such as contact order and size are kept constant, this 'circuit' topology determines folding kinetics. In particular, we find that the folding rate increases with the fractions of parallel and crossed relations. Moreover, we show how circuit topology constrains the conformational phase space explored during folding and unfolding: the number of forbidden unfolding transitions is found to increase with the fraction of parallel relations and to decrease with the fraction of series relations. Finally, we find that circuit topology influences whether distinct intermediate states are present, with crossed contacts being the key factor. The approach presented here can be more generally applied to questions on molecular dynamics, evolutionary biology, molecular engineering, and single-molecule biophysics.

  20. Exploring sets of molecules from patents and relationships to other active compounds in chemical space networks

    Science.gov (United States)

    Kunimoto, Ryo; Bajorath, Jürgen

    2017-09-01

    Patents from medicinal chemistry represent a rich source of novel compounds and activity data that appear only infrequently in the scientific literature. Moreover, patent information provides a primary focal point for drug discovery. Accordingly, text mining and image extraction approaches have become hot topics in patent analysis and repositories of patent data are being established. In this work, we have generated network representations using alternative similarity measures to systematically compare molecules from patents with other bioactive compounds, visualize similarity relationships, explore the chemical neighbourhood of patent molecules, and identify closely related compounds with different activities. The design of network representations that combine patent molecules and other bioactive compounds and view patent information in the context of current bioactive chemical space aids in the analysis of patents and further extends the use of molecular networks to explore structure-activity relationships.

  1. Exploring the relationship between convenience and fish consumption: a cross-cultural study.

    Science.gov (United States)

    Olsen, Svein Ottar; Scholderer, Joachim; Brunsø, Karen; Verbeke, Wim

    2007-07-01

    The purpose of the present study is to explore cultural differences in the meaning of convenience and the relationships between convenience, attitudes and fish consumption in five European countries. The results suggest that the meaning of meal convenience is not culture specific, whilst the absolute levels of convenience orientation and the perceived inconvenience of fish differ between cultures. Convenience orientation was highest in Poland, followed by Spain, and was lowest in the Netherlands. The relationships between convenience orientation and attitudes towards fish, and convenience orientation and fish consumption, were insignificant in most countries. However, convenience orientation was positively related to the perceived inconvenience of fish. Perceived inconvenience of fish was negatively related to both attitudes towards fish and to fish consumption. Together, these results confirm some earlier findings that fish is generally perceived as a relatively inconvenient type of food. This study suggests that convenience orientation can be crucial to understanding food choice or behaviour only when critical mediating constructs are explored.

  2. Coping Rarely Takes Place in a Social Vacuum: Exploring Dyadic Coping in Coach-Athlete Relationships

    OpenAIRE

    Staff, H; Didymus, FF; Backhouse, S

    2017-01-01

    Objectives: Despite widespread acceptance that coping is an interpersonal phenomenon, sport psychology research has focused largely on athletes' and coaches’ ways of coping individually. The aim of this study was to qualitatively explore coping from an interpersonal perspective (i.e., dyadic coping) in coach-athlete relationships. Methodology and methods: Antecedents and outcomes of dyadic coping were discussed with five coach-athlete dyads. We conducted individual interviews with athletes an...

  3. Exploring the relationship between convenience and fish consumption: A cross-cultural study

    OpenAIRE

    OLSEN, SO; SCHOLDERER, J; BRUNSO, K; Verbeke, Wim

    2007-01-01

    The purpose of the present study is to explore cultural differences in the meaning of convenience and the relationships between convenience, attitudes and fish consumption in five European countries. The results suggest that the meaning of meal convenience is not culture specific, whilst the absolute levels of convenience orientation and the perceived inconvenience of fish differ between cultures. Convenience orientation was highest in Poland, followed by Spain, and was lowest in the Netherla...

  4. Exploring the relationship between leadership and organisational culture / Kolisang L.O.

    OpenAIRE

    Kolisang, Lebamang Octavia

    2011-01-01

    This research explores the relationship between leadership and organisational culture in an organisation. Organisational culture is often an important factor influencing the competitive strength of an organisation. Leadership is also a critical component in the success of an organisation. It is important to understand how these two powerful determinants of organisational performance affect each other. Research determining that specific types of organisational culture favour particular styles ...

  5. Exploring the Relationship Between Working Memory, Compressor Speed, and Background Noise Characteristics

    OpenAIRE

    Ohlenforst, Barbara; Souza, Pamela E.; MacDonald, Ewen

    2016-01-01

    Objectives: Previous work has shown that individuals with lower working memory demonstrate reduced intelligibility for speech processed with fast-acting compression amplification. This relationship has been noted in fluctuating noise, but the extent of noise modulation that must be present to elicit such an effect is unknown. This study expanded on previous study by exploring the effect of background noise modulations in relation to compression speed and working memory ability, using a range ...

  6. Topological Aspects of Information Retrieval.

    Science.gov (United States)

    Egghe, Leo; Rousseau, Ronald

    1998-01-01

    Discusses topological aspects of theoretical information retrieval, including retrieval topology; similarity topology; pseudo-metric topology; document spaces as topological spaces; Boolean information retrieval as a subsystem of any topological system; and proofs of theorems. (LRW)

  7. The influence of relationships on neophobia and exploration in wolves and dogs.

    Science.gov (United States)

    Moretti, Lucia; Hentrup, Marleen; Kotrschal, Kurt; Range, Friederike

    2015-09-01

    Exploration is important for animals to be able to gather information about features of their environment that may directly or indirectly influence survival and reproduction. Closely related to exploration is neophobia, which may reduce exposure to danger, but also constrain explorative behaviour. Here we investigated the effects of social relationships on neophobia and exploration in wolves, Canis lupus , and dogs, Canis familiaris . Eleven pack-living wolves reared by human foster parents and 13 identically raised and kept dogs were tested in a novel object test under three different conditions: (1) alone, (2) paired with a pack mate and (3) together with the entire pack. Dogs were less neophobic than wolves and interacted faster with the novel objects. However, the dogs showed overall less interest in the novel objects than wolves, which investigated the objects for longer than the dogs. Both wolves and dogs manipulated objects for longer when paired or in the pack than when alone. While kinship facilitated the investigation of novel objects in the pair condition in both wolves and dogs, rank distance had opposite effects. Our results suggest that the presence of conspecifics supported the exploration of novel objects in both wolves and dogs, particularly within kin and that this may be interpreted as risk sharing. The reduced latency to approach objects and less time spent exploring objects in dogs compared to wolves may be interpreted as an effect of domestication.

  8. Using personal construct methodology to explore relationships with adolescents with Autism Spectrum Disorder.

    Science.gov (United States)

    Murphy, Mark; Burns, Jan; Kilbey, Elizabeth

    2017-11-01

    Research shows that adolescents with Autism Spectrum Disorder (ASD) experience difficulties developing friendships, and that loneliness is a significant factor contributing to higher incidence of anxiety and depression within this population. This study aimed to provide an in-depth analysis of relationships as described by adolescents with ASD, and, from these descriptions, to explore what can be inferred about the development of successful interpersonal relationships for these individuals. Eight adolescents with ASD participated in semi-structured interviews using established personal construct theory (PCT) techniques. PCT was found to be a helpful approach to elicit rich, qualitative data. A thematic analysis identified four themes: relationships as a source of support, perceptions of similarity and difference, valued qualities in self and others, and the development and maintenance of relationships. Whilst this exploratory study highlighted some commonality in terms of perceptions of family support and friendships as protective and desirable, participants differed in their ability to establish and maintain peer relationships. Participants valued personal qualities such as intelligence, humour and trust within relationships, and recognised the important role of peers and siblings in the development of social skills, a finding which has implications for the delivery of social skills training and other interventions. The study provides empirical support for the application of personal construct methodologies in ASD research and offers a potentially useful approach to therapeutic intervention. Copyright © 2017 Elsevier Ltd. All rights reserved.

  9. The Exploration of the Relationships between the Global Competitiveness, the ICT and Education

    Directory of Open Access Journals (Sweden)

    Turkay Yildiz

    2016-12-01

    Full Text Available Information and Communication Technology (ICT is a key element for development and economic expansion. However, many of the developing countries appear to gain only small fraction of the advantages from the ICT sectors. Indeed, developed countries are taking the most of the advantages and opportunities brought by the use of ICT. Therefore, it is necessary to highlight the essential role and the significant relationship of ICT and education for gaining the competitive advantage. In this regard, this study investigates the complex relationships of some of the global competitiveness indicators of the ICT, education and the business sophistication and innovation factors. In this study, several statistically significant relationships are explored by applying canonical correlation analysis. These findings and significant statistical results are highlighted.

  10. Instagram Unfiltered: Exploring Associations of Body Image Satisfaction, Instagram #Selfie Posting, and Negative Romantic Relationship Outcomes.

    Science.gov (United States)

    Ridgway, Jessica L; Clayton, Russell B

    2016-01-01

    The purpose of this study was to examine the predictors and consequences associated with Instagram selfie posting. Thus, this study explored whether body image satisfaction predicts Instagram selfie posting and whether Instagram selfie posting is then associated with Instagram-related conflict and negative romantic relationship outcomes. A total of 420 Instagram users aged 18 to 62 years (M = 29.3, SD = 8.12) completed an online survey questionnaire. Analysis of a serial multiple mediator model using bootstrapping methods indicated that body image satisfaction was sequentially associated with increased Instagram selfie posting and Instagram-related conflict, which related to increased negative romantic relationship outcomes. These findings suggest that when Instagram users promote their body image satisfaction in the form of Instagram selfie posts, risk of Instagram-related conflict and negative romantic relationship outcomes might ensue. Findings from the current study provide a baseline understanding to potential and timely trends regarding Instagram selfie posting.

  11. A Qualitative Exploration of Therapeutic Relationships from the Perspective of Six Children Receiving Speech-Language Therapy

    Science.gov (United States)

    Fourie, Robert; Crowley, Niamh; Oliviera, Ana

    2011-01-01

    Although some studies have explored the adult therapeutic relationship in speech-language pathology, few, if any, have examined it with regard to children. This study aimed to explore the therapeutic relationship in pediatric speech and language therapy, focusing on the child's experience. Accordingly, the study was qualitative and involved the…

  12. Differential topology

    CERN Document Server

    Guillemin, Victor

    2010-01-01

    Differential Topology provides an elementary and intuitive introduction to the study of smooth manifolds. In the years since its first publication, Guillemin and Pollack's book has become a standard text on the subject. It is a jewel of mathematical exposition, judiciously picking exactly the right mixture of detail and generality to display the richness within. The text is mostly self-contained, requiring only undergraduate analysis and linear algebra. By relying on a unifying idea-transversality-the authors are able to avoid the use of big machinery or ad hoc techniques to establish the main

  13. Topologies of climate change

    DEFF Research Database (Denmark)

    Blok, Anders

    2010-01-01

    Climate change is quickly becoming a ubiquitous socionatural reality, mediating extremes of sociospatial scale from the bodily to the planetary. Although environmentalism invites us to ‘think globally and act locally', the meaning of these scalar designations remains ambiguous. This paper explores...... the topological presuppositions of social theory in the context of global climate change, asking how carbon emissions ‘translate' into various sociomaterial forms. Staging a meeting between Tim Ingold's phenomenology of globes and spheres and the social topologies of actor-network theory (ANT), the paper advances...... a ‘relational-scalar' analytics of spatial practices, technoscience, and power. As technoscience gradually constructs a networked global climate, this ‘grey box' comes to circulate within fluid social spaces, taking on new shades as it hybridizes knowledges, symbols, and practices. Global climates thus come...

  14. DNA topology and transcription

    Science.gov (United States)

    Kouzine, Fedor; Levens, David; Baranello, Laura

    2014-01-01

    Chromatin is a complex assembly that compacts DNA inside the nucleus while providing the necessary level of accessibility to regulatory factors conscripted by cellular signaling systems. In this superstructure, DNA is the subject of mechanical forces applied by variety of molecular motors. Rather than being a rigid stick, DNA possesses dynamic structural variability that could be harnessed during critical steps of genome functioning. The strong relationship between DNA structure and key genomic processes necessitates the study of physical constrains acting on the double helix. Here we provide insight into the source, dynamics, and biology of DNA topological domains in the eukaryotic cells and summarize their possible involvement in gene transcription. We emphasize recent studies that might inspire and impact future experiments on the involvement of DNA topology in cellular functions. PMID:24755522

  15. Recent development of chaos theory in topological dynamics

    OpenAIRE

    Li, Jian; Ye, Xiangdong

    2015-01-01

    We give a summary on the recent development of chaos theory in topological dynamics, focusing on Li-Yorke chaos, Devaney chaos, distributional chaos, positive topological entropy, weakly mixing sets and so on, and their relationships.

  16. Exploring the relationship between mentoring and doctors' health and wellbeing: a narrative review.

    Science.gov (United States)

    Wilson, Gemma; Larkin, Valerie; Redfern, Nancy; Stewart, Jane; Steven, Alison

    2017-05-01

    The health and wellbeing of doctors are crucial, both for the individuals themselves and their ability to deliver optimum patient care. With increased pressures on healthcare, support mechanisms that attend to doctors' health and wellbeing may require greater emphasis to safeguard those working in frontline services. To inform future developments, this systematic narrative review aimed to identify, explore and map empirical and anecdotal evidence indicating the relationships between mentoring activities and the health and wellbeing of doctors. Twelve databases were searched for publications printed between January 2006 and January 2016. Articles were included if they involved doctors' engagement in mentoring activities and, either health or wellbeing, or the benefits, barriers or impact of mentoring. The initial search returned 4669 papers, after exclusions a full-text analysis of 37 papers was conducted. Reference lists and citations of each retrieved paper were also searched. Thirteen papers were accepted for review. The Business in the Community model was used as a theoretical framework for analysis. Mentoring influenced collegiate relationships, networking and aspects of personal wellbeing, such as confidence and stress management, and was valued by doctors as a specialist support mechanism. This review contributes to the evidence base concerning mentoring and doctors' health and wellbeing. However, it highlights that focused research is required to explore the relationship between mentoring, and health and wellbeing.

  17. Exploring the relationship between convenience and fish consumption: A cross-cultural study

    DEFF Research Database (Denmark)

    Olsen, Svein Ottar; Scholderer, Joachim; Brunsø, Karen

    2007-01-01

    The purpose of the present study is to explore cultural differences in the meaning of convenience and the relationships between convenience, attitudes and fish consumption in five European countries. The results suggest that the meaning of meal convenience is not culture specific, whilst...... the absolute levels of convenience orientation and the perceived inconvenience of fish differ between cultures. Convenience orientation was highest in Poland, followed by Spain, and was lowest in the Netherlands. The relationships between convenience orientation and attitudes towards fish, and convenience...... orientation and fish consumption, were insignificant in most countries. However, convenience orientation was positively related to the perceived inconvenience of fish. Perceived inconvenience of fish was negatively related to both attitudes towards fish and to fish consumption. Together, these results confirm...

  18. Exploring Relationships between Body Appreciation and Self-Reported Physical Health among Young Women.

    Science.gov (United States)

    Ramseyer Winter, Virginia; O'Neill, Elizabeth A; Omary, Areen

    2017-05-01

    Body image, a multidimensional construct, affects women in myriad ways. Existing scholarship has established a relationship between body image and negative mental and sexual health outcomes and suggests that it may also be related to physical health outcomes. The purpose of the study reported in this article was to explore relationships between body appreciation, a multidimensional measure of body image, and self-perceived physical health among a sample of emerging adult women (N = 399). In this sample, body appreciation was positively and significantly related to self-perceived physical health. This study contributes to a growing body of literature on the consequences of body image among women and can be used to inform interventions aimed at improving the well-being of women. © 2017 National Association of Social Workers.

  19. An explorative study of the relationship between lifestyle and driving behaviour among young drivers

    DEFF Research Database (Denmark)

    Møller, Mette

    2004-01-01

    The high accident risk among young drivers is a well-known and well-documented fact in most countries, including Denmark. Lifestyle has proven to be related to driving behaviour as well as accident risk among young drivers. However, the underlying process through which the relationship between...... the lifestyle and the driving behaviour is established is not yet fully understood. Using focus group interviews divided by sex and education this study explores the psychosocial function of driving as well as the process through which a relationship between lifestyle and driving behaviour is established....... Twenty-nine young drivers living in the Copenhagen area participated in the study. Data were analysed using a modified version of the Editing Analysis Style. (C) 2004 Elsevier Ltd. All rights reserved....

  20. Exploration of Factors Influencing the Customers’ Motivation in Buyer-supplier Relationships on Industrial Markets

    Directory of Open Access Journals (Sweden)

    Bernd Markus Zunk

    2015-12-01

    Full Text Available To gain a competitive advantage on industrial markets, suppliers need to understand what motivates their customers to collaborate in long-term buyer-supplier relationships. Therefore, this paper presents (i a literature-based model of a 12-part industrial customers’ motivation profile, and (ii empirical findings from an explorative survey of 118 decision makers in the purchasing departments of firms in the technology sector. The results indicate that, “the optimum value for money”, “the holistic problem-solving capability of the suppliers and their high degree of performance” and “the good assistance in economically hard times in the past, which has led to a feeling of gratefulness” are all of great importance to industrial customers for building and maintaining relationships.

  1. Exploring the relationship between volunteering and hospice sustainability in the UK: a theoretical model.

    Science.gov (United States)

    Scott, Ros; Jindal-Snape, Divya; Manwaring, Gaye

    2018-05-02

    To explore the relationship between volunteering and the sustainability of UK voluntary hospices. A narrative literature review was conducted to inform the development of a theoretical model. Eight databases were searched: CINAHL (EBSCO), British Nursing Index, Intute: Health and Life Sciences, ERIC, SCOPUS, ASSIA (CSA), Cochrane Library and Google Scholar. A total of 90 documents were analysed. Emerging themes included the importance of volunteering to the hospice economy and workforce, the quality of services, and public and community support. Findings suggest that hospice sustainability is dependent on volunteers; however, the supply and retention of volunteers is affected by internal and external factors. A theoretical model was developed to illustrate the relationship between volunteering and hospice sustainability. It demonstrates the factors necessary for hospice sustainability and the reciprocal impact that these factors and volunteering have on each other. The model has a practical application as an assessment framework and strategic planning tool.

  2. Emerging Trends in Topological Insulators and Topological ...

    Indian Academy of Sciences (India)

    /fulltext/reso/022/08/0787-0800. Keywords. Superconductor, quantum Hall effect, topological insulator, Majorana fermions. Abstract. Topological insulators are new class of materials which arecharacterized by a bulk band gap like ordinary ...

  3. Differential topology

    CERN Document Server

    Margalef-Roig, J

    1992-01-01

    ...there are reasons enough to warrant a coherent treatment of the main body of differential topology in the realm of Banach manifolds, which is at the same time correct and complete. This book fills the gap: whenever possible the manifolds treated are Banach manifolds with corners. Corners add to the complications and the authors have carefully fathomed the validity of all main results at corners. Even in finite dimensions some results at corners are more complete and better thought out here than elsewhere in the literature. The proofs are correct and with all details. I see this book as a reliable monograph of a well-defined subject; the possibility to fall back to it adds to the feeling of security when climbing in the more dangerous realms of infinite dimensional differential geometry. Peter W. Michor

  4. Exploring the relationship between anaesthesiologists' non-technical and technical skills

    DEFF Research Database (Denmark)

    Gjeraa, K; Jepsen, R M H G; Rewers, M

    2016-01-01

    BACKGROUND: A combination of non-technical skills (NTS) and technical skills (TS) is crucial for anaesthetic patient management. However, a deeper understanding of the relationship between these two skills remains to be explored. We investigated the characteristics of trainee anaesthesiologists...... the customised version of the Anaesthetists' Non-Technical Skills System, ANTSdk, and an adapted TS checklist for calculating the correlation between NTS and TS. Written descriptions of the observed NTS were analysed using directed content analysis. RESULTS: The correlation between the NTS and the TS ratings......, concrete NTS were developed to aid the understanding, training and use of NTS....

  5. EFL Speech Production: Exploring the relationship between working memory capacity and proficiency level

    Directory of Open Access Journals (Sweden)

    Gicele Vergine Vieira PREBIANCA

    2013-12-01

    Full Text Available The present study explores the relationship between working memory capacity (WMC and proficiency level in EFL1 speech production. Forty-one participants performed two WMC tests – the Speaking Span Test in L1 and in L2. The statistical analysis indicated both a variation on WMC scores in L2 as a function of proficiency as well as a difference between WMC scores in L1 and in L2. Findings are explained mainly in respect to the interplay between automatic and controlled processes on memory retrieval and on the development of L2 proficiency.

  6. Exploring Black-White Differences in the Relationship Between Inflammation and Timing of Menopause.

    Science.gov (United States)

    Nowakowski, Alexandra C H; Graves, Katelyn Y

    2017-06-01

    Understanding the biosocial context of menopausal timing offers insight into social and health inequalities. Prior research on inflammatory chronic conditions suggests that inflammation may predict how early women experience menopause. We explore the ability of black race to moderate the overall relationship between chronic inflammation and timing of menopause. We use data from the National Social Life, Health, and Aging Project on inflammation, age of last menstruation, and race as well as relevant social and medical covariates. We conduct event history modeling to predict age at menopause by inflammatory biomarker levels. Using interaction analysis, we investigate whether being black may shape the overall relationship between inflammation status and menopause timing. Our analyses find no significant statistical interactions between black race and inflammation in predicting menopausal onset. However, we do identify independent correlational relationships between inflammation and black race (r = 0.136) and between menopausal timing and black race (r = -0.129) as well as inflammation (r = -0.138) that emerge as significant in corresponding regression models. We conclude that race probably does not moderate associations between inflammation and menopause. Yet, we also note that the original parameter estimate for black race's impact on menopausal onset (HR = 1.29, p menopause relationship and recommend future research using mediation modeling.

  7. Induced topological pressure for topological dynamical systems

    International Nuclear Information System (INIS)

    Xing, Zhitao; Chen, Ercai

    2015-01-01

    In this paper, inspired by the article [J. Jaerisch et al., Stochastics Dyn. 14, 1350016, pp. 1-30 (2014)], we introduce the induced topological pressure for a topological dynamical system. In particular, we prove a variational principle for the induced topological pressure

  8. Topological Photonics for Continuous Media

    Science.gov (United States)

    Silveirinha, Mario

    Photonic crystals have revolutionized light-based technologies during the last three decades. Notably, it was recently discovered that the light propagation in photonic crystals may depend on some topological characteristics determined by the manner how the light states are mutually entangled. The usual topological classification of photonic crystals explores the fact that these structures are periodic. The periodicity is essential to ensure that the underlying wave vector space is a closed surface with no boundary. In this talk, we prove that it is possible calculate Chern invariants for a wide class of continuous bianisotropic electromagnetic media with no intrinsic periodicity. The nontrivial topology of the relevant continuous materials is linked with the emergence of edge states. Moreover, we will demonstrate that continuous photonic media with the time-reversal symmetry can be topologically characterized by a Z2 integer. This novel classification extends for the first time the theory of electronic topological insulators to a wide range of photonic platforms, and is expected to have an impact in the design of novel photonic systems that enable a topologically protected transport of optical energy. This work is supported in part by Fundacao para a Ciencia e a Tecnologia Grant Number PTDC/EEI-TEL/4543/2014.

  9. Exploring the relationship between anaesthesiologists' non-technical and technical skills.

    Science.gov (United States)

    Gjeraa, K; Jepsen, R M H G; Rewers, M; Østergaard, D; Dieckmann, P

    2016-01-01

    A combination of non-technical skills (NTS) and technical skills (TS) is crucial for anaesthetic patient management. However, a deeper understanding of the relationship between these two skills remains to be explored. We investigated the characteristics of trainee anaesthesiologists' NTS and TS in a simulated unexpected difficult airway management scenario. A mixed-method approach was used to explore the relationship between NTS and TS in 25 videos of 2nd year trainee anaesthesiologists managing a simulated difficult airway scenario. The videos were assessed using the customised version of the Anaesthetists' Non-Technical Skills System, ANTSdk, and an adapted TS checklist for calculating the correlation between NTS and TS. Written descriptions of the observed NTS were analysed using directed content analysis. The correlation between the NTS and the TS ratings was 0.106 (two-tailed significance of 0.613). Inter-rater reliability was substantial. Themes characterising good NTS included a systematic approach, planning and communicating decisions as well as responding to the evolving situation. A list of desirable, concrete NTS for the specific airway management situation was generated. This study illustrates that anaesthesiologist trainees' NTS and TS were not correlated in this setting, but rather intertwined and how the interplay of NTS and TS can impact patient management. Themes describing the characteristics of NTS and a list of desirable, concrete NTS were developed to aid the understanding, training and use of NTS. © 2015 The Acta Anaesthesiologica Scandinavica Foundation. Published by John Wiley & Sons Ltd.

  10. Introduction to topological quantum matter & quantum computation

    CERN Document Server

    Stanescu, Tudor D

    2017-01-01

    What is -topological- about topological quantum states? How many types of topological quantum phases are there? What is a zero-energy Majorana mode, how can it be realized in a solid state system, and how can it be used as a platform for topological quantum computation? What is quantum computation and what makes it different from classical computation? Addressing these and other related questions, Introduction to Topological Quantum Matter & Quantum Computation provides an introduction to and a synthesis of a fascinating and rapidly expanding research field emerging at the crossroads of condensed matter physics, mathematics, and computer science. Providing the big picture, this book is ideal for graduate students and researchers entering this field as it allows for the fruitful transfer of paradigms and ideas amongst different areas, and includes many specific examples to help the reader understand abstract and sometimes challenging concepts. It explores the topological quantum world beyond the well-know...

  11. Basic algebraic topology and its applications

    CERN Document Server

    Adhikari, Mahima Ranjan

    2016-01-01

    This book provides an accessible introduction to algebraic topology, a field at the intersection of topology, geometry and algebra, together with its applications. Moreover, it covers several related topics that are in fact important in the overall scheme of algebraic topology. Comprising eighteen chapters and two appendices, the book integrates various concepts of algebraic topology, supported by examples, exercises, applications and historical notes. Primarily intended as a textbook, the book offers a valuable resource for undergraduate, postgraduate and advanced mathematics students alike. Focusing more on the geometric than on algebraic aspects of the subject, as well as its natural development, the book conveys the basic language of modern algebraic topology by exploring homotopy, homology and cohomology theories, and examines a variety of spaces: spheres, projective spaces, classical groups and their quotient spaces, function spaces, polyhedra, topological groups, Lie groups and cell complexes, etc. T...

  12. Expressions of commitment and independence: Exploring men’s emotional responsibility in heterosexual couple relationships

    Directory of Open Access Journals (Sweden)

    Tove Thagaard

    2014-02-01

    Full Text Available This paper examines men’s contributions to the division of emotional labour in heterosexual couple relationships by exploring the dimensions of commitment and independence, and how couples deal with challenges. The study is based on individual interviews with each of the partners in ten urban middle-class couples in Norway. The results indicate diversity in middle-class men’s approaches to emotional responsibility, which is expressed through three models. The model of shared responsibility implies that the man’s contributions in the relationship represent expressions of responsive commitment. The man finds a balance between giving priority to his personal interests and considering shared interests; a pattern we refer to as collaborative independence, and he shares the responsibility for coping with challenges with his partner. The model of gendered responsibility implies that the man’s contributions in the relationship are characterized by non-responsive commitment. The man gives priority to his personal interests in a way we refer to as conflicting independence, and refrains from sharing the responsibility for coping with challenges with his partner. Finally, a third model, termed partial responsibility, is also evident in the data. This model is a combination of collaborative independence and non-responsive commitment, and may represent a phase of transition towards collaboration on an equal basis. A discussion of interpretations of the diversity in men’s approaches to commitment and independence concludes the paper.

  13. Ubiquitous Geo-Sensing for Context-Aware Analysis: Exploring Relationships between Environmental and Human Dynamics

    Directory of Open Access Journals (Sweden)

    Euro Beinat

    2012-07-01

    Full Text Available Ubiquitous geo-sensing enables context-aware analyses of physical and social phenomena, i.e., analyzing one phenomenon in the context of another. Although such context-aware analysis can potentially enable a more holistic understanding of spatio-temporal processes, it is rarely documented in the scientific literature yet. In this paper we analyzed the collective human behavior in the context of the weather. We therefore explored the complex relationships between these two spatio-temporal phenomena to provide novel insights into the dynamics of urban systems. Aggregated mobile phone data, which served as a proxy for collective human behavior, was linked with the weather data from climate stations in the case study area, the city of Udine, Northern Italy. To identify and characterize potential patterns within the weather-human relationships, we developed a hybrid approach which integrates several spatio-temporal statistical analysis methods. Thereby we show that explanatory factor analysis, when applied to a number of meteorological variables, can be used to differentiate between normal and adverse weather conditions. Further, we measured the strength of the relationship between the ‘global’ adverse weather conditions and the spatially explicit effective variations in user-generated mobile network traffic for three distinct periods using the Maximal Information Coefficient (MIC. The analyses result in three spatially referenced maps of MICs which reveal interesting insights into collective human dynamics in the context of weather, but also initiate several new scientific challenges.

  14. Exploring the Relationship between Human Capital Investment and Corporate Financial Performance of Jordanian Industrial Sectors

    Directory of Open Access Journals (Sweden)

    Faris Nasif ALSHUBIRI

    2013-12-01

    Full Text Available The revolution of globalization, computerization and information technology has entered to Jordanian market. This phenomenon requires company's attention of human element and the acquired knowledge, experience and the development of the so-called concept of intellectual capital.(IC In this study I used only the human capital as a part of IC. This study aims to exploring the relationship between human capital investment (HCI, and corporate financial performance. This study used an 11 industrial sectors listed of Amman Stock Exchange from 2005to 2011. Correlation analysis tests used in this study and the results indicate the high positive significant relationship between HCI and corporate financial performance related to, ROE , PTBV , log of sales , log of assets , DPS and ICR but no significant relationship between HCI and WCTO. The researcher recommends industrial companies to strengthen and stimulate the concept of human capital in the companies and the need for develop administrative innovation program. For future analysis may be used more sectors listed in market in addition used the all parts of intellectual capital related to structural and physical capital with corporate financial performance.

  15. Exploring the relationships between high involvement work system practices, work demands and emotional exhaustion : A multi-level study.

    NARCIS (Netherlands)

    Oppenauer, V.; van de Voorde, F.C.

    2018-01-01

    This study explores the impact of enacted high involvement work systems (HIWS) practices on employee emotional exhaustion. This study hypothesized that work overload and job responsibility mediate the relationship between HIWS practices (ability, motivation, opportunity and work design HIWS

  16. The topology of architecture

    DEFF Research Database (Denmark)

    Marcussen, Lars

    2003-01-01

    Rummets topologi, Historiens topologi: betragtninger om menneskets orientering til rum - fra hulen over beherskelse af flere akser til det flydende rum.......Rummets topologi, Historiens topologi: betragtninger om menneskets orientering til rum - fra hulen over beherskelse af flere akser til det flydende rum....

  17. Localifecation of variable-basis topological systems | Solovyov ...

    African Journals Online (AJOL)

    The paper provides another approach to the notion of variable-basis topological system generalizing the fixed-basis concept of S. Vickers, considers functorial relationships between the categories of modified variable-basis topological systems and variable-basis fuzzy topological spaces in the sense of S.E. Rodabaugh ...

  18. Topological superconductors: a review.

    Science.gov (United States)

    Sato, Masatoshi; Ando, Yoichi

    2017-07-01

    This review elaborates pedagogically on the fundamental concept, basic theory, expected properties, and materials realizations of topological superconductors. The relation between topological superconductivity and Majorana fermions are explained, and the difference between dispersive Majorana fermions and a localized Majorana zero mode is emphasized. A variety of routes to topological superconductivity are explained with an emphasis on the roles of spin-orbit coupling. Present experimental situations and possible signatures of topological superconductivity are summarized with an emphasis on intrinsic topological superconductors.

  19. Topological Modeling and Stochastic Analysis of Images

    National Research Council Canada - National Science Library

    Krim, Hamid

    2004-01-01

    .... Concepts in classification and recognition problems. 1. We have explored the potential of combining geometrical as well as topological information in capturing the essence of an object for classification and recognition purposes...

  20. Exploring the Effects of Social Exchange Relationships on the Scholarly Productivity of New Faculty Members in Accounting

    Science.gov (United States)

    Ugrin, Joseph C.; Odom, Marcus D.; Pearson, J. Michael; Bahmanziari, Tammy R.

    2012-01-01

    This paper explores how social relationships between new accounting faculty members and their former dissertation chairs can influence the publishing productivity of the new faculty members in their early academic careers. The focus on social relationships offers a unique approach to studying the effectiveness doctoral education. Our findings show…

  1. Exploring the Relationship Between Professional Commitment and Job Satisfaction Among Nurses.

    Science.gov (United States)

    Hsu, Hsiu-Chin; Wang, Pao-Yu; Lin, Li-Hui; Shih, Whei-Mei; Lin, Mei-Hsiang

    2015-09-01

    This cross-sectional study explored the relationship between professional commitment and job satisfaction among nurses. A total of 132 registered nurses were recruited from a hospital in northern Taiwan. A self-reported structured questionnaire was used to collect data. Findings revealed significant differences among nurses in willingness to make an effort and their marital status, appraisal in continuing their careers, job level, and goals and values related to working shifts. Significant differences were found between inner satisfaction and work sector and marital status. Nurses' professional commitment was strongly related to job satisfaction; aspects of professional commitment explained 32% of the variance in job satisfaction. Study results may inform health care institutions about the importance of nurses' job satisfaction and professional commitment so hospital administration can improve these aspects of organizational environment. © 2015 The Author(s).

  2. Exploring the Relationship Between Students with Accommodations and Instructor Self-Efficacy in Complying with Accommodations

    Directory of Open Access Journals (Sweden)

    Anna M. Wright

    2017-06-01

    Full Text Available The willingness and flexibility of university instructors to comply with and provide accommodations for students with disabilities is critical to academic success. The authors examine how communication between students needing accommodations and university instructors impacts instructor self-efficacy, or instructors’ perception that they can meet the accommodation. Specifically, the authors’ explored the relationship between student self-disclosure of a disability and instructor empathy, flexibility, and self-efficacy in meeting student accommodation needs. Results revealed that the more a student self-discloses about a needed accommodation, the more self-efficacy an instructor has in making that accommodation. For the low-disclosure condition, empathy and flexibility were both significant predictors of self-efficacy, whereas, for the high-disclosure condition, only flexibility was a significant predictor of self-efficacy. Finally, instructors’ levels of empathy and flexibility both decreased after reading both the high and low self-disclosure scenarios.

  3. Exploring interdisciplinary relationships between linguistics and information retrieval from the 1960s to today

    DEFF Research Database (Denmark)

    Engerer, Volkmar Paul

    2017-01-01

    This article explores how linguistics has influenced information retrieval (IR) and attempts to explain the impact of linguistics through an analysis of internal developments in information science generally, and IR in particular. It notes that information science/IR has been evolving from a case...... science into a fully fledged, “disciplined”/disciplinary science. The article establishes correspondences between linguistics and information science/IR using the three established IR paradigms—physical, cognitive, and computational—as a frame of reference. The current relationship between information...... science/IR and linguistics is elucidated through discussion of some recent information science publications dealing with linguistic topics and a novel technique, “keyword collocation analysis,” is introduced. Insights from interdisciplinarity research and case theory are also discussed. It is demonstrated...

  4. Exploring the impact of marital relationship on the mental health of children: Does parent-child relationship matter?

    Science.gov (United States)

    Li, Chunkai; Jiang, Shan; Fan, Xiaoyan; Zhang, Qiunv

    2018-04-01

    This study aimed to examine the associations between marital relationships and parent-child relationships on children's mental health. Participants included 19,487 students from the 2013-2014 baseline China Education Panel Survey. Structural equation modeling was applied to analyze the data and results revealed that marital and parent-child relationships positively affected children's mental health. Parent-child relationship also played a mediating role between marital relationship and children's mental health. The unique contributions of this study and its theoretical and practical implications were discussed.

  5. Exploring relationships between host genome and microbiome: new insights from genome-wide association studies.

    Directory of Open Access Journals (Sweden)

    Muslihudeen Abdul-Razaq Abdul-Aziz

    2016-10-01

    Full Text Available As our understanding of the human microbiome expands, impacts on health and disease continue to be revealed. Alterations in the microbiome can result in dysbiosis, which has now been linked to subsequent autoimmune and metabolic diseases, highlighting the need to identify factors that shape the microbiome. Research has identified that the composition and functions of the human microbiome can be influenced by diet, age, gender, and environment. More recently, studies have explored how human genetic variation may also influence the microbiome. Here, we review several recent analytical advances in this new research area, including those that use genome-wide association studies to examine host genome-microbiome interactions, while controlling for the influence of other factors. We find that current research is limited by small sample sizes, lack of cohort replication, and insufficient confirmatory mechanistic studies. In addition, we discuss the importance of understanding long-term interactions between the host genome and microbiome, as well as the potential impacts of disrupting this relationship, and explore new research avenues that may provide information about the co-evolutionary history of humans and their microorganisms.

  6. Exploration

    International Nuclear Information System (INIS)

    Lohrenz, J.

    1992-01-01

    Oil and gas exploration is a unique kind of business. Businesses providing a vast and ever-changing panoply of products to markets are a focus of several disciplines' energetic study and analysis. The product inventory problem is robust, pertinent, and meaningful, and it merits the voluminous and protracted attention received from keen business practitioners. Prototypical business practitioners, be they trained by years of business hurly-burly, or sophisticated MBAs with arrays of mathematical algorithms and computers, are not normally prepared, however, to recognize the unique nature of exploration's inventories. Put together such a business practitioner with an explorationist and misunderstandings, hidden and open, are inevitable and predictably rife. The first purpose of this paper is to articulate the inherited inventory handling paradigms of business practitioners in relation to exploration's inventories. To do so, standard pedagogy in business administration is used and a case study of an exploration venture is presented. A second purpose is to show the burdens that the misunderstandings create. The result is not just business plans that go awry, but public policies that have effects opposite from those intended

  7. Not good enough and on a tether: exploring how violent relationships impact women's sense of self.

    Science.gov (United States)

    Lynch, Shannon M

    2013-01-01

    There is general agreement among researchers that partner violence and self-esteem are significantly inversely correlated. Several qualitative researchers have examined women's narratives within small samples for self statements and discovered references to lost or damaged sense of self. However, the process by which partner violence impacts women's sense of self and the extent of its influence on women's sense of self remains unclear. To further our understanding, the current study explored 100 women's sense of self in the context of their relationships. Women responded to open ended questions about how they describe themselves, influences on their sense of self, and perceived self changes. Participants in troubled relationships were recruited with fliers and advertisements. Over half of the women reported physically or psychologically abusive partners (n = 57) in the prior 12 months while 43 women reported no physical violence and little to no psychological abuse in the past year. All women made positive self references, but women with violent partners also included more numerous negative self descriptions. Women with violent partners also described more negative self-change (decreased assertiveness, confidence), loss of identity or a sense of themselves as different in different contexts; themes not commonly found in the comparison sample. For both groups, however, other influences, such as work and friends, appeared to provide opportunities for positive and affirming self-perceptions.

  8. Exploring the relationship difficulties of Iranian adolescents with conduct disorder: a qualitative content analysis.

    Science.gov (United States)

    Salmanian, Maryam; Ghobari-Bonab, Bagher; Alavi, Seyyed-Salman; Jokarian, Ali-Akbar; Mohammadi, Mohammad-Reza

    2016-01-20

    Conduct disorder is characterized by aggressive behaviors, deceitfulness or theft, destruction of property and serious violations of rules prior to age 18 years. The object relations theory provides an integrative model to understand the problems of conduct disorder, and proposes that child-caregiver relationships develop the internal working models of self and others. The aim of this study was to explore the relationship difficulties of Iranian adolescents with conduct disorder. This study was a qualitative directed content analysis research. The in-depth interview was conducted with nine male adolescents aged 12-17 years who had conduct disorder with or without substance use disorder at the reformatory in Tehran. All tape-recorded data were fully transcribed and analyzed. The relations with different objects including parents, siblings, relatives, friends, peers, teachers, other school members, colleagues and employers were analyzed, and four themes were extracted: 1) Object relations based on insecurity and fear; 2) Object relations based on inability and abjection; 3) Object relations based on pessimism and mistrust; 4) Object relations based on non-maintenance of boundaries and limits. The importance of object relations and attachment problems in adolescents with conduct disorder, and their need to participate in special intervention programs should be reconsidered.

  9. Exploring the relationship between non suicidal self-injury and borderline personality traits in young adults.

    Science.gov (United States)

    Vega, Daniel; Torrubia, Rafael; Soto, Àngel; Ribas, Joan; Soler, Joaquim; Pascual, Juan Carlos; Rodríguez-Fornells, Antoni; Marco-Pallarés, Josep

    2017-10-01

    Non-suicidal self-injury (NSSI) is highly prevalent during late adolescence and young adulthood. There is some evidence of a link between NSSI and Borderline Personality Disorder (BPD), but little is known about the association between BPD traits and the various functions that maintain NSSI. The main purpose of this study was to explore the association between borderline personality traits and NSSI functions in a sample of college students. We also compared NSSI functions in college students who engaged in NSSI to those in an age-matched sample of BPD patients. This study included a total of 238 college students and 36 BPD patients. Participants were asked to complete a number of clinical measures. In the non-clinical sample, BPD features were more pronounced in the presence of NSSI, and we observed a differential relationship between NSSI functions and psychopathological BPD-traits. The NSSI clinical variables most strongly associated with BPD were frequency, variety of methods and severity, but not age of onset. Our results provide new information on the relationship between BPD and NSSI in young adults, and could be used to improve the early detection of vulnerable BPD-individuals and in planning NSSI treatment. Copyright © 2017 Elsevier B.V. All rights reserved.

  10. Collegial relationship breakdown: a qualitative exploration of nurses in acute care settings.

    Science.gov (United States)

    Cowin, Leanne S

    2013-01-01

    Poor collegial relations can cause communication breakdown, staff attrition and difficulties attracting new nursing staff. Underestimating the potential power of nursing team relationships means that opportunities to create better working environments and increase the quality of nursing care can be missed. Previous research on improving collegiality indicates that professionalism and work satisfaction increases and that staff attrition decreases. This study explores challenges, strengths and strategies used in nursing team communication in order to build collegial relationships. A qualitative approach was employed to gather nurses experiences and discussion of communication within their nursing teams and a constant comparison method was utilised for data analysis. A convenience sampling technique was employed to access both Registered Nurses and Enrolled Nurses to partake in six focus groups. Thirty mostly female nurses (ratio of 5:1) participated in the study. Inclusion criteria consisted of being a nurse currently working in acute care settings and the exclusion criteria included nursing staff currently working in closed specialty units (i.e. intensive care units). Results revealed three main themes: (1) externalisation and internalisation of nursing team communication breakdown, (2) the importance of collegiality for retention of nurses and (3) loss of respect, and civility across the healthcare workplace. A clear division between hierarchies of nurses was apparent in how nursing team communication was delivered and managed. Open, respectful and collegial communication is essential in today's dynamic and complex health environments. The nurses in this study highlighted how important nursing communication can be to work motivation and how leadership fosters teamwork.

  11. Exploring Science Teachers' Affective States: Pedagogical Discontentment, Self-efficacy, Intentions to Reform, and Their Relationships

    Science.gov (United States)

    Kahveci, Ajda; Kahveci, Murat; Mansour, Nasser; Alarfaj, Maher Mohammed

    2017-06-01

    Teachers play a key role in moving reform-based science education practices into the classroom. Based on research that emphasizes the importance of teachers' affective states, this study aimed to explore the constructs pedagogical discontentment, science teaching self-efficacy, intentions to reform, and their correlations. Also, it aimed to provide empirical evidence in light of a previously proposed theoretical model while focusing on an entirely new context in Middle East. Data were collected in Saudi Arabia with a total of randomly selected 994 science teachers, 656 of whom were females and 338 were males. To collect the data, the Arabic versions of the Science Teachers' Pedagogical Discontentment scale, the Science Teaching Efficacy Beliefs Instrument and the Intentions to Reform Science Teaching scale were developed. For assuring the validity of the instruments in a non-Western context, rigorous cross-cultural validations procedures were followed. Factor analyses were conducted for construct validation and descriptive statistical analyses were performed including frequency distributions and normality checks. Univariate analyses of variance were run to explore statistically significant differences between groups of teachers. Cross-tabulation and correlation analyses were conducted to explore relationships. The findings suggest effect of teacher characteristics such as age and professional development program attendance on the affective states. The results demonstrate that teachers who attended a relatively higher number of programs had lower level of intentions to reform raising issues regarding the conduct and outcomes of professional development. Some of the findings concerning interrelationships among the three constructs challenge and serve to expand the previously proposed theoretical model.

  12. Topological hierarchy matters — topological matters with superlattices of defects

    International Nuclear Information System (INIS)

    He Jing; Kou Su-Peng

    2016-01-01

    Topological insulators/superconductors are new states of quantum matter with metallic edge/surface states. In this paper, we review the defects effect in these topological states and study new types of topological matters — topological hierarchy matters. We find that both topological defects (quantized vortices) and non topological defects (vacancies) can induce topological mid-gap states in the topological hierarchy matters after considering the superlattice of defects. These topological mid-gap states have nontrivial topological properties, including the nonzero Chern number and the gapless edge states. Effective tight-binding models are obtained to describe the topological mid-gap states in the topological hierarchy matters. (topical review)

  13. Topological analysis of metabolic control.

    Science.gov (United States)

    Sen, A K

    1990-12-01

    A topological approach is presented for the analysis of control and regulation in metabolic pathways. In this approach, the control structure of a metabolic pathway is represented by a weighted directed graph. From an inspection of the topology of the graph, the control coefficients of the enzymes are evaluated in a heuristic manner in terms of the enzyme elasticities. The major advantage of the topological approach is that it provides a visual framework for (1) calculating the control coefficients of the enzymes, (2) analyzing the cause-effect relationships of the individual enzymes, (3) assessing the relative importance of the enzymes in metabolic regulation, and (4) simplifying the structure of a given pathway, from a regulatory viewpoint. Results are obtained for (a) an unbranched pathway in the absence of feedback the feedforward regulation and (b) an unbranched pathway with feedback inhibition. Our formulation is based on the metabolic control theory of Kacser and Burns (1973) and Heinrich and Rapoport (1974).

  14. Exploring quadrangulations

    KAUST Repository

    Peng, Chi-Han; Barton, Michael; Jiang, Caigui; Wonka, Peter

    2014-01-01

    Here we presented a framework to explore quad mesh topologies. The core of our work is a systematic enumeration algorithm that can generate all possible quadrangular meshes inside a defined boundary with an upper limit of v3-v5 pairs. The algorithm is orders of magnitude more efficient than previous work. The combination of topological enumeration and shape-space exploration demonstrates that mesh topology has a powerful influence on geometry. The Fig. 18. A gallery of different quadrilateral meshes for a Shuriken. The quadrilaterals of the model were colored in a postprocess. Topological variations have distinctive, interesting patterns of mesh lines. © 2014 ACM 0730-0301/2014/01-ART3 15.00.

  15. Exploring quadrangulations

    KAUST Repository

    Peng, Chi-Han

    2014-02-04

    Here we presented a framework to explore quad mesh topologies. The core of our work is a systematic enumeration algorithm that can generate all possible quadrangular meshes inside a defined boundary with an upper limit of v3-v5 pairs. The algorithm is orders of magnitude more efficient than previous work. The combination of topological enumeration and shape-space exploration demonstrates that mesh topology has a powerful influence on geometry. The Fig. 18. A gallery of different quadrilateral meshes for a Shuriken. The quadrilaterals of the model were colored in a postprocess. Topological variations have distinctive, interesting patterns of mesh lines. © 2014 ACM 0730-0301/2014/01-ART3 15.00.

  16. Exploring the relationship between nursing home financial performance and management entrepreneurial attributes.

    Science.gov (United States)

    Davis, Jullet A; Marino, Louis D; Vecchiarini, Mariangela

    2013-01-01

    This paper explores the relationship between entrepreneurial orientation (EO) (i.e., their innovativeness, proactiveness and risk-taking) and financial performance in nursing homes. We hypothesize that nursing homes that are more proactive will report better short-term financial performance, while when firms with higher propensities for innovativeness and risk-taking will experience poorer financial performance in the short period due to the high costs associated with the initial adoption of innovation and with pursuing high-risks ventures. In 2004, a survey was developed and mailed to a population of 670 nursing homes in the state of Florida who were listed in the Florida Nursing Home Guide of the Agency for Health Care Administration. The final sample for this study included 104 respondents. The data from these surveys were merged with additional variables gathered from the 2004 Online Survey Certification and Reporting (OSCAR) system and the 2004/2005 Medicare Cost Reports (MCR). EO was operationalized using a nine-item scale adapted from Covin and Slevin (1989), and financial performance was assessed using total profit margin. The overall findings suggest partial support for the hypotheses. Support was found for the negative relationship between innovativeness and short-term financial performance, but only partial support was found for the relationship between performance and risk-taking. Our results demonstrated that the various aspects of entrepreneurial behaviors have a differential effect on firm performance. From a managerial perspective, nursing home administrators may continue to seek ways to be entrepreneurial while understanding that some activities may only lead to short-term profitability. These findings should not dissuade administrators from innovative behaviors. They do suggest, however, that innovative administrators should prepare for some initial decrease in profitability following new service implementation. Findings suggest that to varying

  17. Quantum computation with topological codes from qubit to topological fault-tolerance

    CERN Document Server

    Fujii, Keisuke

    2015-01-01

    This book presents a self-consistent review of quantum computation with topological quantum codes. The book covers everything required to understand topological fault-tolerant quantum computation, ranging from the definition of the surface code to topological quantum error correction and topological fault-tolerant operations. The underlying basic concepts and powerful tools, such as universal quantum computation, quantum algorithms, stabilizer formalism, and measurement-based quantum computation, are also introduced in a self-consistent way. The interdisciplinary fields between quantum information and other fields of physics such as condensed matter physics and statistical physics are also explored in terms of the topological quantum codes. This book thus provides the first comprehensive description of the whole picture of topological quantum codes and quantum computation with them.

  18. Exploring personality clusters among parents of ED subjects. Relationship with parents' psychopathology, attachment, and family dynamics.

    Science.gov (United States)

    Amianto, Federico; Daga, Giovanni Abbate; Bertorello, Antonella; Fassino, Secondo

    2013-10-01

    Eating disorders are some of the most difficult mental disorders to treat and manage. Family interacts with genetic dispositions and other pathogenic factors, and may influence the outburst, development and outcome of EDs. The present study explores with a cluster analysis the personality traits of parents of ED subjects. One-hundred-eight mothers and 104 fathers were tested with Temperament Character Inventory (TCI), Eating Disorder Inventory-2 (EDI-2), State-Trait Anger Expression Inventory (STAX), Family Assessment Device (FAD), Attachment Style Questionnaire (ASQ), Symptom Questionnaire (SQ), Psychological Well-Being scales (PWB). The cluster distribution of parents based on personality traits was explored. Parents' clusters TCI scores were compared as regards personality, psychopathology, attachment and family features. Cross distribution of temperament and character clusters in mothers and fathers, among couples and ED diagnoses of the daughters was explored. Two clusters of mothers and fathers were identified with temperament clustering. Character traits led to two mothers and three fathers clusters. Mothers temperament cluster 1 (MTC1) correspond to a explosive/adventurous profile, MTC2 to a cautious/passive-dependent profile. Fathers temperament cluster 1 (FTC1) was explosive/methodic, FTC2 was independent/methodic. Character clustering distinguished very immature mothers (MCC1) and majority (65%) of character mature mothers with low self-transcendence (MCC2). A third of fathers was severely immature (FCC1), a third impaired as regards relationships (poor cooperativeness and self-transcendence; FCC2), and one third character mature fathers with low self-transcendence (FCC3). Each cluster evidences specific psychopathology and attachment characteristics. FTC1 was more frequently associated with character immaturity. No significant clusters' cross correlation was found in parental couples. Parents' clusters analyze in depth the univocal picture of

  19. Book Review: Computational Topology

    DEFF Research Database (Denmark)

    Raussen, Martin

    2011-01-01

    Computational Topology by Herbert Edelsbrunner and John L. Harer. American Matheamtical Society, 2010 - ISBN 978-0-8218-4925-5......Computational Topology by Herbert Edelsbrunner and John L. Harer. American Matheamtical Society, 2010 - ISBN 978-0-8218-4925-5...

  20. Topological massive sigma models

    International Nuclear Information System (INIS)

    Lambert, N.D.

    1995-01-01

    In this paper we construct topological sigma models which include a potential and are related to twisted massive supersymmetric sigma models. Contrary to a previous construction these models have no central charge and do not require the manifold to admit a Killing vector. We use the topological massive sigma model constructed here to simplify the calculation of the observables. Lastly it is noted that this model can be viewed as interpolating between topological massless sigma models and topological Landau-Ginzburg models. ((orig.))

  1. EXPLORING THE RELATIONSHIP BETWEEN LEADERSHIP COMMUNICATION STYLE, PERSONALITY TRAIT AND ORGANIZATIONAL PRODUCTIVITY

    Directory of Open Access Journals (Sweden)

    Oludele Mayowa Solaja

    2016-05-01

    Full Text Available In organizational research and practice, prolific communication is significantly linked with quality leadership traits. Leadership quality helps in mitigating the failure of an organization to survive the increasing business challenges that may result in waste of resources, talents and potentials needed for achieving optimal organizational productivity. However, an examination of academic literatures reveal that corporate leaders are often faced with the challenge of how to move smoothly between different communication styles to communicate clearly articulating ideas and knowledge to employee’s whenever the occasion demands which hinders organizational productivity. Against this background, this study explores the relationship between leadership communication style, personality trait and organizational productivity. The study utilized cross-sectional survey method. Participants were 112 academic staff of University of Lagos, Nigeria who was selected through multi-stage sampling techniques. Data were collected through structured questionnaire and personal observation. Results show that there exists a connection between leadership communication style and personality trait. Also, the finding revealed that leadership communication style determines organization productivity. More so, the finding established that personality traits and communication styles have combine effect on organizational productivity. Conclusively, the findings were discussed with reference to relevant empirical literatures with recommendations for management of organizations both for practice and future research highlighted.

  2. Sense of Community on Twitter and Instagram: Exploring the Roles of Motives and Parasocial Relationships.

    Science.gov (United States)

    Blight, Michael G; Ruppel, Erin K; Schoenbauer, Kelsea V

    2017-05-01

    Although research has explored the ways in which people form virtual communities to converse about media figures, television shows, and similar topics, little research has examined the link between virtual communities and the parasocial relationships (PSRs) that are often the focus of these conversations and users' experiences in those virtual communities. We examined sense of community (SOC) on Twitter and Instagram as a function of users' motives for use and users' PSR on the sites. In addition to examining the relative importance of different motives for using Twitter and Instagram, we predicted that PSR would mediate the association between motives for use and SOC. Results of an online survey revealed that Instagram users (n = 276) reported stronger social interaction motives than did Twitter users (n = 223). Social interaction and expressive information sharing motives were directly positively associated with SOC for users of both sites. Instagram users also exhibited indirect effects of expressive information sharing and companionship motives on SOC, through PSR. These findings suggest potentially influential differences between Twitter and Instagram, particularly regarding the role of PSR in fostering a general SOC.

  3. Exploring the relationship between classroom type and teacher ıntervention fidelity

    Directory of Open Access Journals (Sweden)

    Jessica Suhrheinrich

    2016-12-01

    Full Text Available As special education enrollment for children with autism spectrum disorders (ASD has increased, school-based programs and providers have been challenged to expand the scope and quality of services. Researchers and school-based providers are aligned in the goal of providing high-quality services to students with ASD, however current literature does not address how training and implementation needs may differ by the age of children served. The current study evaluates variability in teacher fidelity of Classroom Pivotal Response Teaching (CPRT, an evidence-based naturalistic behavioral intervention based on the principals of applied behavior analysis. Data included 479 individual video units collected from 101 teacher and 221 student participants. Videos were coded using behavioral coding definitions and student demographic information was collected from parents of participating children. Analyses explored differences in fidelity of CPRT by age of students. Results indicate a significant relationship between classroom type (preschool/elementary and teachers’ fidelity of CPRT, suggesting the possibility of targeted training based on student age.

  4. Exploring the relationships among service quality features, perceived value and customer satisfaction

    Directory of Open Access Journals (Sweden)

    Azman Ismail

    2009-07-01

    Full Text Available The purpose of this paper is to explore the relationships among service quality features (responsiveness, assurance, and empathy, perceived value and customer satisfaction in the context of Malaysia. The empirical data are drawn from 102 members of an academic staff of a Malaysian public institution of higher learning using a survey questionnaire. The results indicate three important findings: firstly, the interaction between perceived value and responsiveness was not significantly correlated with customer satisfaction. Secondly, the interaction between perceived value and assurance also did not correlate significantly with customer satisfaction. Thirdly, the interaction between perceived value and empathy correlated significantly with customer satisfaction. Thus the results demonstrate that perceived value had increased the effect of empathy on customer satisfaction, but it had not increased the effect of responsiveness and assurance on customer satisfaction. In sum, this study confirms that perceived value act as a partial moderating variable in the service quality models of the organizational sample. In addition, implications and limitations of this study, as well as directions for future research are discussed.

  5. Exploring the relationship between energy consumption and GDP: Evidence from Croatia

    International Nuclear Information System (INIS)

    Borozan, Djula

    2013-01-01

    The main purpose of this paper is to explore the relationship between total energy consumption and real gross domestic product (GDP) covering the period between 1992 and 2010 in Croatia. The methodology employed in this paper is based on the bivariate vector autoregression (VAR) and Granger causality tests. Moreover, the impulse response function and variance decomposition analysis are employed to trace the dynamic response paths of shocks to the system. The empirical analysis shows that, when it is allowed for any deterministic component in the data, total energy consumption and real GDP are not co-integrated in the period observed. Furthermore, there is a unidirectional causality running from total energy consumption to GDP, and an impulse response to GDP caused by energy consumption, being mainly embodied in the first years. The results indicate that total energy consumption is an important component determining economic growth in Croatia and that energy conservation policy should be formulated and implemented wisely. This paper also tests the causality between real GDP and consumption of the five energy variables by using the bivariate VAR. The main implication of these tests is that individual energy forms matter when it comes to energy policy formulation. - Highlights: • There is a unidirectional causality running from energy consumption to real GDP in Croatia. • There is an impulse response to real GDP caused by energy consumption, being mainly embodied in the first years. • Energy consumption is an important component determining economic growth. • Individual energy forms matter when it comes to energy policy formulation

  6. Not your problem? Exploring the relationship between problem formulation and social responsibility

    Directory of Open Access Journals (Sweden)

    Sveinung Jørgensen

    2011-05-01

    Full Text Available This article explores the relationship between organizationalproblem formulation and social responsibility. Thepurpose of the article is to illuminate how organizationalproblem formulations (1 determine the manner in whichthe organization attempts to solve the problem and (2involve the ascription of significance to a group of stakeholdersseen as relevant for the organization. This has implicationsfor the degree to which they assume responsibilityfor those stakeholders. We discuss three dimensions ofresponsible decision making – rationality in goal attainment,reverence for ethical norms, and respect for stakeholders.Thereby, we arrive at an understanding of how differentorganizations in the same sector conceive of, andattempt to solve fundamental problems in the sector, aswell as how their assumed responsibility is reflected therein.We present and discuss a case that discusses keysimilarities and differences between two organizations inthe drug sector – a pharmaceutical company that producesmedicine for the treatment of drug addiction and a foundationworking with drug rehabilitation. We illuminatehow the two organizations base their activities on divergentformulations of the drug problem and how this ismanifested in their approach to the problem. We argue that this ultimately translates into differences in the inclusion of various stakeholdersin their problem space, and thereby the degree to which they assumeresponsibility for key stakeholders. This contributes to the corporate socialresponsibility literature by providing an in depth account of how problem formulationsshape organizational activities and determine the practical inclusionof stakeholders’ interests in the decisions and activities of organizations.

  7. A Pilot Study Exploring Gender Differences in Residents’ Strategies for Establishing Mentoring Relationships

    Directory of Open Access Journals (Sweden)

    Megan C. McNamara, M.D., MSc

    2008-01-01

    Full Text Available AbstractBackground Mentoring is important throughout a physician’s career and has been noted to be particularly important during residency training. Other studies suggest that women may experience difficulty in finding mentors.Purpose This study explored gender-specific differences in residents’ mentoring experiences.Methods The authors conducted two focus groups at the University of Pittsburgh in July, 2004. One group was composed of 12 female residents; the other was composed of nine male residents. Discussions were audiotaped and transcribed. Two investigators coded the transcripts and identified emerging themes.Results Residents of both genders cited multiple barriers to mentoring. Men´s strategies for findingmentors were more numerous than women´s and included identifying mentors through research,similar interests, friendship, and networking. Female strategies were limited and included identifying mentors through “word of mouth” and work experiences. Women described more passiveapproaches for finding a mentor than men.Conclusions Female residents may lack strategies and initiatives for finding mentors. Residency programs should create opportunities for residents to develop mentoring relationships, with special attention paid to gender differences

  8. Exploring the Relationship between Students' Understanding of Conventional Time and Deep (Geologic) Time

    Science.gov (United States)

    Cheek, Kim A.

    2013-07-01

    Many geologic processes occur in the context of geologic or deep time. Students of all ages demonstrate difficulty grasping this fundamental concept which impacts their ability to acquire other geoscience concepts. A concept of deep time requires the ability to sequence events on an immense temporal scale (succession) and to judge the durations of geologic processes based on the rates at which they occur. The twin concepts of succession and duration are the same ideas that underlie a concept of conventional time. If deep time is an extension of conventional time and not qualitatively different from it, students should display similar reasoning patterns when dealing with analogous tasks over disparate temporal periods. Thirty-five US students aged 13-24 years participated in individual task-based interviews to ascertain how they thought about succession and duration in conventional and deep time. This is the first attempt to explore this relationship in the same study in over 30 years. Most students successfully completed temporal succession tasks, but there was greater variability in responses on duration tasks. Conventional time concepts appear to impact how students reason about deep time. The application of spatial reasoning to temporal tasks sometimes leads to correct responses but in other instances does not. Implications for future research and teaching strategies are discussed.

  9. Free Boolean Topological Groups

    Directory of Open Access Journals (Sweden)

    Ol’ga Sipacheva

    2015-11-01

    Full Text Available Known and new results on free Boolean topological groups are collected. An account of the properties that these groups share with free or free Abelian topological groups and properties specific to free Boolean groups is given. Special emphasis is placed on the application of set-theoretic methods to the study of Boolean topological groups.

  10. Mooses, topology and Higgs

    International Nuclear Information System (INIS)

    Gregoire, Thomas; Wacker, Jay G.

    2002-01-01

    New theories of electroweak symmetry breaking have recently been constructed that stabilize the weak scale and do not rely upon supersymmetry. In these theories the Higgs boson is a weakly coupled pseudo-Goldstone boson. In this note we study the class of theories that can be described by theory spaces and show that the fundamental group of theory space describes all the relevant classical physics in the low energy theory. The relationship between the low energy physics and the topological properties of theory space allow a systematic method for constructing theory spaces that give any desired low energy particle content and potential. This provides us with tools for analyzing and constructing new theories of electroweak symmetry breaking. (author)

  11. Exploring Relationships among Tree-Ring Growth, Climate Variability, and Seasonal Leaf Activity on Varying Timescales and Spatial Resolutions

    OpenAIRE

    Bhuyan, Upasana;Zang, Christian;Vicente-Serrano, Sergio;Menzel, Annette

    2018-01-01

    In the first section of this study, we explored the relationship between ring width index (RWI) and normalized difference vegetation index (NDVI) time series on varying timescales and spatial resolutions, hypothesizing positive associations between RWI and current and previous- year NDVI at 69 forest sites scattered in the Northern Hemisphere. We noted that the relationship between RWI and NDVI varies over space and between tree types (deciduous versus coniferous), bioclimatic zones, cumulati...

  12. Exploring Relationships among Tree-Ring Growth, Climate Variability, and Seasonal Leaf Activity on Varying Timescales and Spatial Resolutions

    OpenAIRE

    Upasana Bhuyan; Christian Zang; Sergio M. Vicente-Serrano; Annette Menzel

    2017-01-01

    In the first section of this study, we explored the relationship between ring width index (RWI) and normalized difference vegetation index (NDVI) time series on varying timescales and spatial resolutions, hypothesizing positive associations between RWI and current and previous- year NDVI at 69 forest sites scattered in the Northern Hemisphere. We noted that the relationship between RWI and NDVI varies over space and between tree types (deciduous versus coniferous), bioclimatic zones, cumulati...

  13. Epistemological beliefs in introductory biology: Addressing measurement concerns and exploring the relationship with strategy use

    Science.gov (United States)

    Holschuh, Jodi Lynn

    This study had two main purposes: to address measurement concerns about assessing students' epistemological beliefs and to explore the relationship between epistemological beliefs and deep and surface strategy use in an introductory biology classroom. The following research questions guided the study: (a) Are epistemological beliefs multidimensional? (b) Are the measures of epistemological beliefs correlated? (c) Are the measures of strategy use correlated? (d) Are epistemological beliefs correlated with deep and surface strategy use? (e) How much of the unique variance in Scholastic Aptitude Test (SAT) scores, grade point average (GPA), and course grade is accounted for by epistemological beliefs and strategy use? (f) To what extent does the content analysis of the open-ended questionnaire data support or refute the role of mature epistemological beliefs? and (g) To what extent does the content analysis of the open-ended questionnaire data support or refute the role of deep strategies? Participants (N = 518) were recruited from two sections of an introductory biology course. All participants completed five assessments including the Epistemological Questionnaire, the Epistemological Scenario, the Self-Regulated Learning Inventory, two strategy checklists, and an open-ended questionnaire. The factor analysis, which was used to answer the first question, indicated no clear loading of the hypothesized dimensions underlying epistemological beliefs as measured by the Epistemological Questionnaire. However, the factor analysis of the Epistemological Scenario indicated four factors underlying epistemological beliefs (i.e., certain knowledge, innate ability, quick learning, and simple knowledge). In addition, the correlation analyses, which were used to answer the second, third, and fourth questions, indicated a significant relationship between epistemological beliefs and strategy use. The multiple regression commonality analysis, which was used to answer the fifth

  14. Exploring Phylogenetic Relationships within Myriapoda and the Effects of Matrix Composition and Occupancy on Phylogenomic Reconstruction.

    Science.gov (United States)

    Fernández, Rosa; Edgecombe, Gregory D; Giribet, Gonzalo

    2016-09-01

    Myriapods, including the diverse and familiar centipedes and millipedes, are one of the dominant terrestrial arthropod groups. Although molecular evidence has shown that Myriapoda is monophyletic, its internal phylogeny remains contentious and understudied, especially when compared to those of Chelicerata and Hexapoda. Until now, efforts have focused on taxon sampling (e.g., by including a handful of genes from many species) or on maximizing matrix size (e.g., by including hundreds or thousands of genes in just a few species), but a phylogeny maximizing sampling at both levels remains elusive. In this study, we analyzed 40 Illumina transcriptomes representing 3 of the 4 myriapod classes (Diplopoda, Chilopoda, and Symphyla); 25 transcriptomes were newly sequenced to maximize representation at the ordinal level in Diplopoda and at the family level in Chilopoda. Ten supermatrices were constructed to explore the effect of several potential phylogenetic biases (e.g., rate of evolution, heterotachy) at 3 levels of gene occupancy per taxon (50%, 75%, and 90%). Analyses based on maximum likelihood and Bayesian mixture models retrieved monophyly of each myriapod class, and resulted in 2 alternative phylogenetic positions for Symphyla, as sister group to Diplopoda + Chilopoda, or closer to Diplopoda, the latter hypothesis having been traditionally supported by morphology. Within centipedes, all orders were well supported, but 2 deep nodes remained in conflict in the different analyses despite dense taxon sampling at the family level. Relationships among centipede orders in all analyses conducted with the most complete matrix (90% occupancy) are at odds not only with the sparser but more gene-rich supermatrices (75% and 50% supermatrices) and with the matrices optimizing phylogenetic informativeness or most conserved genes, but also with previous hypotheses based on morphology, development, or other molecular data sets. Our results indicate that a high percentage of ribosomal

  15. Exploring the interpersonal relationships in street-based male sex work: results from an Australian qualitative study.

    Science.gov (United States)

    Leary, David; Minichiello, Victor

    2007-01-01

    While the literature on male sex work has increased significantly over the past decade, few studies examine the influence of relational dynamics in the lives of those engaged in male sex work. This qualitative study, conducted with a sample of male street sex workers in Sydney, Australia, explores how relationships color their involvement with sex work. The findings reveal the complexity of their relationships and how their interactions with others shape their engagement in sex work. The data also offer insight into how exit pathways are influenced by money and relationships that occur within this particular male sex work setting. Implications for health policy and intervention are considered.

  16. Network topology analysis.

    Energy Technology Data Exchange (ETDEWEB)

    Kalb, Jeffrey L.; Lee, David S.

    2008-01-01

    Emerging high-bandwidth, low-latency network technology has made network-based architectures both feasible and potentially desirable for use in satellite payload architectures. The selection of network topology is a critical component when developing these multi-node or multi-point architectures. This study examines network topologies and their effect on overall network performance. Numerous topologies were reviewed against a number of performance, reliability, and cost metrics. This document identifies a handful of good network topologies for satellite applications and the metrics used to justify them as such. Since often multiple topologies will meet the requirements of the satellite payload architecture under development, the choice of network topology is not easy, and in the end the choice of topology is influenced by both the design characteristics and requirements of the overall system and the experience of the developer.

  17. Exploring Coworker Relationships: Antecedents and Dimensions of Interpersonal Fit, Coworker Satisfaction, and Relational Models

    NARCIS (Netherlands)

    E.K. Byington (Eliza)

    2013-01-01

    textabstractManagement scholarship has revealed the myriad ways in which relationships between coworkers impact individual, team, and organizational phenomena. However, our scientific understanding of coworker relationships and what makes for satisfying connections with colleagues is still in its

  18. Exploring the Relationship Between Working Memory, Compressor Speed, and Background Noise Characteristics.

    Science.gov (United States)

    Ohlenforst, Barbara; Souza, Pamela E; MacDonald, Ewen N

    2016-01-01

    Previous work has shown that individuals with lower working memory demonstrate reduced intelligibility for speech processed with fast-acting compression amplification. This relationship has been noted in fluctuating noise, but the extent of noise modulation that must be present to elicit such an effect is unknown. This study expanded on previous study by exploring the effect of background noise modulations in relation to compression speed and working memory ability, using a range of signal to noise ratios. Twenty-six older participants between ages 61 and 90 years were grouped by high or low working memory according to their performance on a reading span test. Speech intelligibility was measured for low-context sentences presented in background noise, where the noise varied in the extent of amplitude modulation. Simulated fast- or slow-acting compression amplification combined with individual frequency-gain shaping was applied to compensate for the individual's hearing loss. Better speech intelligibility scores were observed for participants with high working memory when fast compression was applied than when slow compression was applied. The low working memory group behaved in the opposite way and performed better under slow compression compared with fast compression. There was also a significant effect of the extent of amplitude modulation in the background noise, such that the magnitude of the score difference (fast versus slow compression) depended on the number of talkers in the background noise. The presented signal to noise ratios were not a significant factor on the measured intelligibility performance. In agreement with earlier research, high working memory allowed better speech intelligibility when fast compression was applied in modulated background noise. In the present experiment, that effect was present regardless of the extent of background noise modulation.

  19. Exploring the relationship between food access and foodborne illness by using spatial analysis.

    Science.gov (United States)

    Newbold, Bruce; Watson, Susannah; Mackay, Kevin; Isaacs, Sandy

    2013-09-01

    There is some evidence that neighborhood deprivation increases residents' risk of foodborne illnesses. Because urban areas with the least available access to adequate amounts of nutritious or affordable food options (or "food deserts") also tend to be the most deprived areas within a city, it is hypothesized that food access and foodborne illness risk are linked. However, the complexity of tracking numbers and sources of gastrointestinal (GI) illnesses often leads researchers to speculate about reasons for disproportionate rates of pathogen outbreaks among demographic groups. This study explores the suitability of existing data to examine associations between food deserts and the spatial distribution of GI illnesses in Hamilton, Ontario, Canada. A spatial analysis by using GIS software methodology was used to identify and map food retail outlets and accessibility, as well as GI illness outbreaks and sales of antidiarrhea, antinausea, and rehydration products (used as a proxy for GI cases) within the city, based on available data. Statistical analysis of the maps shows no statistical relationship between location, access to food outlets, and rates of GI illness. The analysis points to shortfalls and gaps in the existing data, which leaves us unable to draw conclusions either supporting or refuting our hypothesis. This article includes recommendations to improve the current system of illness reporting and to continue to refine the definition and process of mapping food access issues. A more comprehensive set of data would enable municipalities to more easily identify groups most at risk, depending on exposures and the type of pathogen, and reduce the occurrence of foodborne disease.

  20. Comparing Machine Learning Classifiers and Linear/Logistic Regression to Explore the Relationship between Hand Dimensions and Demographic Characteristics.

    Science.gov (United States)

    Miguel-Hurtado, Oscar; Guest, Richard; Stevenage, Sarah V; Neil, Greg J; Black, Sue

    2016-01-01

    Understanding the relationship between physiological measurements from human subjects and their demographic data is important within both the biometric and forensic domains. In this paper we explore the relationship between measurements of the human hand and a range of demographic features. We assess the ability of linear regression and machine learning classifiers to predict demographics from hand features, thereby providing evidence on both the strength of relationship and the key features underpinning this relationship. Our results show that we are able to predict sex, height, weight and foot size accurately within various data-range bin sizes, with machine learning classification algorithms out-performing linear regression in most situations. In addition, we identify the features used to provide these relationships applicable across multiple applications.

  1. 'I think it's about experiencing, like, life': a qualitative exploration of contemporary adolescent intimate relationships in South Africa.

    Science.gov (United States)

    Gevers, Anik; Jewkes, Rachel; Mathews, Cathy; Flisher, Alan

    2012-01-01

    Intimate or dating relationships play an important role in young people's psychosocial development and well-being. Yet, we know relatively little about how teenagers conceptualise and experience them. Research knowledge about young people's intimate relationships is largely gleaned from studies whose primary focus has been on adolescent sexuality and violence. This study explored intimate relationships using qualitative data from 12 focus-group discussions and 25 in-depth individual interviews with Grade 8 (mean age = 14.6 years) and Grade 11 (mean age = 17.2 years) young people recruited from Cape Town schools. Although there is overlap between these findings and previous research, this study delved into the microdynamics of teenagers' relationship practices and conceptualisations. Their discussions provide insight into a nebulous dating landscape that is highly gendered and greatly influenced by peer relations. There was a heterogeneity of experience with relationships and sex. Implications for intervention development are discussed.

  2. Exploring the dark side of interpersonal relationships between buyers and suppliers of logistics services

    Directory of Open Access Journals (Sweden)

    Arno Meyer

    2017-06-01

    Conclusion: Managers should not underestimate the potential hegemony between individuals who have interpersonal relationships. Relationships require upkeep, personal involvement, attention and trust. Interpersonal relationship intentions without formal safety measures, such as organisational governance and policies, can expose and even diminish the strongest organisational alliances to suboptimal performance and reduced profitability.

  3. Exploring the Relationship between State Financial Aid Policy and Postsecondary Enrollment Choices: A Focus on Income and Race Differences

    Science.gov (United States)

    Kim, Jiyun

    2012-01-01

    This study explores the relationship between state financial aid policies and postsecondary enrollment for high school graduates (or equivalent diploma holders). Utilizing an event history modeling for a nationally representative sample from the National Education Longitudinal Study (NELS:88/2000) in addition to state-level policy variables, this…

  4. Exploring the Relationships among Self-Regulation, Acculturation, and Academic and Social Integration for Asian International Doctoral Students

    Science.gov (United States)

    Wu, Yi-Chin

    2015-01-01

    This dissertation examined the relationship between Asian international doctoral students' self-regulation on academic and social integration and explored how acculturation tendencies function as a mediator between self-regulated learning and academic and social integration. Previous research has indicated that self-regulated learning has a great…

  5. The role of Intangible Assets in the Relationship between HRM and Innovation: A Theoretical and Empirical Exploration

    NARCIS (Netherlands)

    Jinchveladze, T.; Zschockelt, F.; van Velzen, Martijn; Looise, Jan C.

    2009-01-01

    This paper, as far as known, provides a first attempt to explore the role of intellectual capital (IC) and knowledge management (KM) in an integrative way between the relationship of human resource (HR) practices and two types of innovation (radical and incremental). More specifically, the study

  6. Exploring Value Orientations toward the Human-Nature Relationship: A Comparison of Urban Youth in Minnesota, USA and Guangdong, China

    Science.gov (United States)

    Li, Jie; Ernst, Julie

    2015-01-01

    Research exploring urban youths' value orientations toward the human-nature relationship was conducted with 59 students from a school in Minneapolis, Minnesota (USA) and 51 students from a school in Guangzhou, Guangdong (China). Quantitative findings suggest that the majority of participants in both groups shared a similar value orientation,…

  7. Exploring the Relationship between Self-Determination Theory, Adults' Barriers to Exercise, and Physical Activity

    Science.gov (United States)

    Ball, James W.; Bice, Matthew R.; Maljak, Kimberly A.

    2017-01-01

    Physical activity is a preventative measure that can help decrease obesity trends. However, many individuals struggle to live a physically active lifestyle. The purpose of this study was to explore the relationships between Self-Determination Theory, adults' barriers to exercise, and those who have met and have not met the Center for Disease…

  8. Exploring the Relationship between Experiential Avoidance, Alcohol Use Disorders, and Alcohol-Related Problems among First-Year College Students

    Science.gov (United States)

    Levin, Michael E.; Lillis, Jason; Seeley, John; Hayes, Steven C.; Pistorello, Jacqueline; Biglan, Anthony

    2012-01-01

    Objective: This study explored the relationship of experiential avoidance (eg, the tendency to avoid, suppress, or otherwise control internal experiences even when doing so causes behavioral harm) to alcohol use disorders and alcohol-related problems. Participants: Cross-sectional data were collected from 240 undergraduate college students in…

  9. An Exploration of Teachers' Agency and Social Relationships within Dyslexia-Support Provision in an English Secondary School

    Science.gov (United States)

    Ross, Helen

    2017-01-01

    This article explores teachers' experiences of dyslexia and classroom interventions via lesson observations and semi-structured interviews. These experiences were analysed through a Bourdieusien lens, based on Jenkins's "levels of interaction", to delineate power relationships inherent in classroom interactions, teachers' interactions…

  10. Exploring the Relationship between Experienced Students' Preference for Open- and Closed-Book Examinations, Approaches to Learning and Achievement

    Science.gov (United States)

    Karagiannopoulou, Evangelia; Milienos, Fotios S.

    2013-01-01

    The relationship between university students' approaches to learning and preference for the open- and closed-book examinations was investigated for 144 Greek undergraduate (56 third- and 88 fourth-year) students attending a Philosophy, Education and Psychology Department. The approaches were explored by the Approaches and Study Skills Inventory…

  11. An Exploration of the Relationship between Vietnamese Students' Knowledge of L1 Grammar and Their English Grammar Proficiency

    Science.gov (United States)

    Tran, Tammie M.

    2010-01-01

    The problem. This research study explores an important issue in the field of TESOL (Teaching English to Speakers of Other Languages) and second language acquisition (SLA). Its purpose is to examine the relationship between Vietnamese students' L1 grammar knowledge and their English grammar proficiency. Furthermore, it investigates the extent to…

  12. Moral Rationality and Intuition: An Exploration of Relationships between the Defining Issues Test and the Moral Foundations Questionnaire

    Science.gov (United States)

    Glover, Rebecca J.; Natesan, Prathiba; Wang, Jie; Rohr, Danielle; McAfee-Etheridge, Lauri; Booker, Dana D.; Bishop, James; Lee, David; Kildare, Cory; Wu, Minwei

    2014-01-01

    Explorations of relationships between Haidt's Moral Foundations Questionnaire (MFQ) and indices of moral decision-making assessed by the Defining Issues Test have been limited to correlational analyses. This study used Harm, Fairness, Ingroup, Authority and Purity to predict overall moral judgment and individual Defining Issues Test-2 (DIT-2)…

  13. An Exploration of the Relationship between Students' Preferences for Formative Feedback and Self-Regulated Learning Skills

    Science.gov (United States)

    Çakir, Recep; Korkmaz, Özgen; Bacanak, Ahmet; Arslan, Ömer

    2016-01-01

    The purpose of this study is to explore students' preferences for formative feedback and its relationship with their self-regulated learning skills. The study used a mixed methods approach in which quantitative data collection and analysis was followed by qualitative data collection and analysis. "Preferences toward Formative Feedback"…

  14. Geometry, topology, and string theory

    Energy Technology Data Exchange (ETDEWEB)

    Varadarajan, Uday [Univ. of California, Berkeley, CA (United States)

    2003-01-01

    A variety of scenarios are considered which shed light upon the uses and limitations of classical geometric and topological notions in string theory. The primary focus is on situations in which D-brane or string probes of a given classical space-time see the geometry quite differently than one might naively expect. In particular, situations in which extra dimensions, non-commutative geometries as well as other non-local structures emerge are explored in detail. Further, a preliminary exploration of such issues in Lorentzian space-times with non-trivial causal structures within string theory is initiated.

  15. Geometry, topology, and string theory

    International Nuclear Information System (INIS)

    Varadarajan, Uday

    2003-01-01

    A variety of scenarios are considered which shed light upon the uses and limitations of classical geometric and topological notions in string theory. The primary focus is on situations in which D-brane or string probes of a given classical space-time see the geometry quite differently than one might naively expect. In particular, situations in which extra dimensions, non-commutative geometries as well as other non-local structures emerge are explored in detail. Further, a preliminary exploration of such issues in Lorentzian space-times with non-trivial causal structures within string theory is initiated

  16. EXPLORING THE EFFECT OF FACEBOOK AS A RELATIONSHIP MARKETING TOOL: THE CASE OF LITHUANIAN TELECOMMUNICATIONS INDUSTRY

    OpenAIRE

    SETKUTE, JUSTINA

    2014-01-01

    In today’s competitive business environment greater numbers of companies are searching for sustainable competitive advantage by building long-term relationships with their customers. This study focuses on relationship marketing, marketing tool Facebook and its subsequent impact on the business performance. The existing literature highlights the importance of customer retention and the long-term relationships between the company and the customers. Social media and social networking sites with ...

  17. A Unique Laboratory to Explore Soil-Wine Relationships, North Canterbury, New Zealand

    Science.gov (United States)

    Harrison, R.; Tomasino, E.; Tonkin, P.; Webb, T.; Burns, S. F.; Weersing, M.

    2012-12-01

    The special character of North Canterbury is a reflection of its geological history - a region of oblique crustal convergence forming northeast striking folds, creating hill, valley and basin topography. Cretaceous to Tertiary glauconitic sediments, limestones, sandstones and weathered conglomerates overlie basement greywacke sandstones and siltstones. During the late Quaternary, erosion infilled valleys with locally sourced sediments, and basins with greywacke alluvium. Calcareous and noncalcareous loess mantles are locally sourced. Detailed soil mapping of vineyards planted between 1980 and 2000 reveal bedrock and colluvial hill slopes with clayey Haplustolls and Argiustolls, fans with deep silty Hapustalfs and terraces with deep alluvium forming clayey Calciusterts and gravels forming Haplustepts. Definitions of terroir variously include physical attributes such as climate, landscapes, soils and vines, together with cultural traditions represented by grape varieties and systems for canopy management, which come together in particular sensory attributes displayed by certain wines. We have recently begun to explore terroir in the context of New Zealand Pinot Noir (the variety considered by many as most able to communicate details of local geography and site). The assessment of wine sensory attributes is not a trivial task. Our experience is that scale is an important influence as ferment size decreases. We recommend the use of commercially produced wines for such studies. Our work has been carried out using statistically valid designs with expert but untrained panelists. In these circumstances the meaning ascribed to particular attributes may vary between panelists but there is evidence to support the contention that expert panelists tend to share a standard vocabulary and are likely to be familiar with appropriate conceptual models of the wines that allow their differentiation. Our results confirm that Pinot Noir wines from climatically differing regions of New

  18. From topology to geometry

    International Nuclear Information System (INIS)

    Eberhart, M.

    1996-01-01

    A systematic study of the charge density topologies corresponding to a number of transition metal aluminides with the B2 structure indicates that unstable crystal structures are sometimes associated with uncharacteristic topologies. This observation invites the speculation that the distance to a topological instability might relate to a metals phase behavior. Following this speculation, a metric is imposed on the topological theory of Bader, producing a geometrical theory, where it is now possible to assign a distance from a calculated charge density topology to a topological instability. For the cubic transition metals, these distances are shown to correlate with single crystal elastic constants, where the metals that are furthest from an instability are observed to be the stiffest. (author). 16 refs., 1 tab., 9 figs

  19. Topological mirror superconductivity.

    Science.gov (United States)

    Zhang, Fan; Kane, C L; Mele, E J

    2013-08-02

    We demonstrate the existence of topological superconductors (SCs) protected by mirror and time-reversal symmetries. D-dimensional (D=1, 2, 3) crystalline SCs are characterized by 2(D-1) independent integer topological invariants, which take the form of mirror Berry phases. These invariants determine the distribution of Majorana modes on a mirror symmetric boundary. The parity of total mirror Berry phase is the Z(2) index of a class DIII SC, implying that a DIII topological SC with a mirror line must also be a topological mirror SC but not vice versa and that a DIII SC with a mirror plane is always time-reversal trivial but can be mirror topological. We introduce representative models and suggest experimental signatures in feasible systems. Advances in quantum computing, the case for nodal SCs, the case for class D, and topological SCs protected by rotational symmetries are pointed out.

  20. [Career consciousness among Japanese female students: relationships between vocational motivation and career exploration].

    Science.gov (United States)

    Adachi, Tomoko

    2008-04-01

    This questionnaire study investigated career consciousness among 348 Japanese female freshman and sophomore college students. Variables included career consciousness (belief in the idea of a best-fit vocation, passivity, and giving priority to personal interests), vocational motives (self-improvement, interpersonal, status), as well as career decision-making self-efficacy (self-appraisal, gathering occupational information) and career exploration (self and environmental exploration). The results of causal analyses showed that the belief in the idea of a best-fit vocation and passivity had effects on all three vocational motives, but giving priority to personal interests had an effect only on motivation for self-improvement. Analysis of covariance (ANCOVA) models were constructed with career exploration as dependent variables, career consciousness as fixed factors, and career decision-making self-efficacy as covariates. The results of the analyses showed that students who had high career decision-making self-efficacy engaged in both self exploration and environmental exploration activities with a higher frequency. Students with a greater passive tendency toward their career engaged in both self and environmental exploration with a lower frequency. Belief in the idea of a best-fit vocation was associated only with differences in frequency of self exploration. Giving priority to personal interests did not produce differences in career exploration activities.

  1. EXPLORING THE RELATIONSHIP BETWEEN CDS AND RATINGANNOUNCEMENTS: A LITERATURE REVIEW AND FUTURERESEARCH DIRECTIONS

    Directory of Open Access Journals (Sweden)

    Rosella Carè

    2013-01-01

    Full Text Available This paper proposes a systematic literature review for exploring the relationshipbetween CDS and rating announcements. To achieve this purpose, we haveisolated and explored the primary relevantfields in the literature and discussed thefindings. The value added of this preliminary work can be identified in the effortto identify new and promising research areas for future work.

  2. Exploring selectivity requirements for COX-2 versus COX-1 binding of 2-(5-phenyl-pyrazol-1-yl)-5-methanesulfonylpyridines using topological and physico-chemical parameters.

    Science.gov (United States)

    Chakraborty, Santanu; Sengupta, Chandana; Roy, Kunal

    2005-04-01

    Considering the current need for development of selective cyclooxygenase-2 (COX-2) inhibitors, an attempt has been made to explore physico-chemical requirements of 2-(5-phenyl-pyrazol-1-yl)-5-methanesulfonylpyridines for binding with COX-1 and COX-2 enzyme subtypes and also to explore the selectivity requirements. In this study, E-states of different common atoms of the molecules (calculated according to Kier & Hall), first order valence connectivity and physicochemical parameters (hydrophobicity pi, Hammett sigma and molar refractivity MR of different ring substituents) were used as independent variables along with suitable dummy parameters in the stepwise regression method. The best equation describing COX-1 binding affinity [n = 25, Q2 = 0.606, R(a)2 = 0.702, R2 = 0.752, R = 0.867, s = 0.447, F = 15.2 (df 4, 20)] suggests that the COX-1 binding affinity increases in the presence of a halogen substituent at R1 position and a p-alkoxy or p-methylthio substituent at R2 position. Furthermore, a difluoromethyl group is preferred over a trifluoromethyl group at R position for the COX-1 binding. The best equation describing COX-2 binding affinity [n = 32, Q2 = 0.622, R(a)2= 0.692, R2 = 0.732, R = 0.856, s = 0.265, F = 18.4 (df 4, 27)] shows that the COX-2 binding affinity increases with the presence of a halogen substituent at R1 position and increase of size of R2 substituents. However, it decreases in case of simultaneous presence of 3-chloro and 4-methoxy groups on the phenyl nucleus and in the presence of highly lipophilic R2 substituents. The best selectivity relation [n = 25, Q2 = 0.455, R(a)2 = 0.605, R2 = 0.670, R = 0.819, s = 0.423, F = 10.2 (df 4, 20)] suggests that the COX-2 selectivity decreases in the presence of p-alkoxy group and electron-withdrawing para substituents at R2 position. Again, a trifluoro group is conductive for the selectivity instead of a difluoromethyl group at R position. Furthermore, branching may also play significant role in

  3. Perceptions of Relationships and Evaluations of Satisfaction: An Exploration of Interaction.

    Science.gov (United States)

    Bruning, Stephen D.; Ledingham, John A.

    2000-01-01

    Examines key public members' perceptions of the personal, professional, and community relationships they have with a bank and relates those perceptions to evaluations of satisfaction. Finds members' perceptions of their personal and professional relationships significantly influence evaluations of overall satisfaction. Discusses implications for…

  4. Religious Identity and Cultural Diversity: Exploring the Relationships between Religious Identity, Sexism, Homophobia, and Multicultural Competence

    Science.gov (United States)

    Balkin, Richard S.; Schlosser, Lewis Z.; Levitt, Dana Heller

    2009-01-01

    In this article, the authors present the results from a national study investigating the relationships between religious identity, sexism, homophobia, and multicultural competence. Participants were 111 randomly sampled counseling professionals and graduate students. The results indicated a relationship between religious identity and various…

  5. Why So Difficult? Exploring Negative Relationships between Educational Leaders: The Role of Trust, Climate, and Efficacy

    Science.gov (United States)

    Daly, Alan J.; Moolenaar, Nienke M.; Liou, Yi-Hwa; Tuytens, Melissa; del Fresno, Miguel

    2015-01-01

    Recent work suggests the importance of collaboration among district-office and school leaders. Most studies examine prosocial relationships, but negative social ties, which may be more consequential, are rarely examined. We collected survey data from 78 educational leaders on perceptions of culture and negative relationships and used…

  6. Nuances before Dinner: Exploring the Relationship between Peer Counselors and Delinquent Adolescents.

    Science.gov (United States)

    Beitel, Mark

    1997-01-01

    Details the peer counselor-client relationship from the point of view of a participant observer. By examining the relationship through the clinical lenses of self-psychology and object relations, it was found that peer counselors are seen as transitional objects who can both interpret and meet client needs. (RJM)

  7. Sifting and Winnowing: An Exploration of the Relationship between Multi-Cultural Education and CBTE.

    Science.gov (United States)

    Grant, Carl A., Ed.

    This book contains 17 articles, each by a different author, and addressed to those who wish to become informed about the relationship between multicultural education and competency-based teacher education (CBTE). In order to study the relationship between multicultural education and CBTE, a number of individuals actively engaged in either the…

  8. Persistent topological features of dynamical systems

    Energy Technology Data Exchange (ETDEWEB)

    Maletić, Slobodan, E-mail: slobodan@hitsz.edu.cn [Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen (China); Institute of Nuclear Sciences Vinča, University of Belgrade, Belgrade (Serbia); Zhao, Yi, E-mail: zhao.yi@hitsz.edu.cn [Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen (China); Rajković, Milan, E-mail: milanr@vinca.rs [Institute of Nuclear Sciences Vinča, University of Belgrade, Belgrade (Serbia)

    2016-05-15

    Inspired by an early work of Muldoon et al., Physica D 65, 1–16 (1993), we present a general method for constructing simplicial complex from observed time series of dynamical systems based on the delay coordinate reconstruction procedure. The obtained simplicial complex preserves all pertinent topological features of the reconstructed phase space, and it may be analyzed from topological, combinatorial, and algebraic aspects. In focus of this study is the computation of homology of the invariant set of some well known dynamical systems that display chaotic behavior. Persistent homology of simplicial complex and its relationship with the embedding dimensions are examined by studying the lifetime of topological features and topological noise. The consistency of topological properties for different dynamic regimes and embedding dimensions is examined. The obtained results shed new light on the topological properties of the reconstructed phase space and open up new possibilities for application of advanced topological methods. The method presented here may be used as a generic method for constructing simplicial complex from a scalar time series that has a number of advantages compared to the mapping of the same time series to a complex network.

  9. Topological Foundations of Electromagnetism

    CERN Document Server

    Barrett, Terrence W

    2008-01-01

    Topological Foundations of Electromagnetism seeks a fundamental understanding of the dynamics of electromagnetism; and marshals the evidence that in certain precisely defined topological conditions, electromagnetic theory (Maxwell's theory) must be extended or generalized in order to provide an explanation and understanding of, until now, unusual electromagnetic phenomena. Key to this generalization is an understanding of the circumstances under which the so-called A potential fields have physical effects. Basic to the approach taken is that the topological composition of electromagnetic field

  10. Topology of Event Horizon

    OpenAIRE

    Siino, Masaru

    1997-01-01

    The topologies of event horizons are investigated. Considering the existence of the endpoint of the event horizon, it cannot be differentiable. Then there are the new possibilities of the topology of the event horizon though they are excluded in smooth event horizons. The relation between the topology of the event horizon and the endpoint of it is revealed. A torus event horizon is caused by two-dimensional endpoints. One-dimensional endpoints provide the coalescence of spherical event horizo...

  11. Topological nearly entropy

    Science.gov (United States)

    Gulamsarwar, Syazwani; Salleh, Zabidin

    2017-08-01

    The purpose of this paper is to generalize the notions of Adler's topological entropy along with their several fundamental properties. A function f : X → Y is said to be R-map if f-1 (V) is regular open in X for every regular open set V in Y. Thus, we initiated a notion of topological nearly entropy for topological R-dynamical systems which is based on nearly compact relative to the space by using R-map.

  12. Decorrelating topology with HMC

    International Nuclear Information System (INIS)

    Lippert, Th.; Alles, B.; Bali, G.; D'Elia, M.; Di Giacomo, A.; Eicker, N.; Guesken, S.; Schilling, K.; Spitz, A.; Struckmann, T.; Ueberholz, P.; Viehoff, J.

    1999-01-01

    The investigation of the decorrelation efficiency of the HMC algorithm with respect to vacuum topology is a prerequisite for trustworthy full QCD simulations, in particular for the computation of topology sensitive quantities. We demonstrate that for ((m π )/(m ρ ))-ratios ≥ 0.69 sufficient tunneling between the topological sectors can be achieved, for two flavours of dynamical Wilson fermions close to the scaling region (β 5.6). Our results are based on time series of length 5000 trajectories

  13. Job insecurity and organizational citizenship behavior: exploring curvilinear and moderated relationships.

    Science.gov (United States)

    Lam, Chak Fu; Liang, Jian; Ashford, Susan J; Lee, Cynthia

    2015-03-01

    This article examined a curvilinear relationship between job insecurity and organizational citizenship behavior (OCB). Drawing from social exchange theory and research on personal control, we developed and tested an explanation for employees' reactions to job insecurity based on their conceptualization of their social exchange relationship with the organization at different levels of job insecurity. Using data from 244 Chinese employees and 102 supervisory ratings of OCB, we found support for a U-shaped relationship between job insecurity and OCB. Moreover, 2 factors--psychological capital and subordinate-supervisor guanxi--moderated the curvilinear relationship, such that the curvilinear relationship is more pronounced among those with lower psychological capital or less positive subordinate-supervisor guanxi. PsycINFO Database Record (c) 2015 APA, all rights reserved.

  14. $L$-Topological Spaces

    Directory of Open Access Journals (Sweden)

    Ali Bajravani

    2018-04-01

    Full Text Available ‎By substituting the usual notion of open sets in a topological space $X$ with a suitable collection of maps from $X$ to a frame $L$, we introduce the notion of L-topological spaces. Then, we proceed to study the classical notions and properties of usual topological spaces to the newly defined mathematical notion. Our emphasis would be concentrated on the well understood classical connectedness, quotient and compactness notions, where we prove the Thychonoff's theorem and connectedness property for ultra product of $L$-compact and $L$-connected topological spaces, respectively.

  15. Elements of topology

    CERN Document Server

    Singh, Tej Bahadur

    2013-01-01

    Topological SpacesMetric Spaces Topologies Derived Concepts Bases Subspaces Continuity and ProductsContinuityProduct TopologyConnectednessConnected Spaces Components Path-Connected Spaces Local ConnectivityConvergence Sequences Nets Filters Hausdorff SpacesCountability Axioms 1st and 2nd Countable Spaces Separable and Lindelöf SpacesCompactnessCompact Spaces Countably Compact Spaces Compact Metric Spaces Locally Compact Spaces Proper Maps Topological Constructions Quotient Spaces Identification Maps Cones, Suspensions and Joins Wedge Sums and Smash Products Adjunction Spaces Coherent Topologie

  16. Topics in general topology

    CERN Document Server

    Morita, K

    1989-01-01

    Being an advanced account of certain aspects of general topology, the primary purpose of this volume is to provide the reader with an overview of recent developments.The papers cover basic fields such as metrization and extension of maps, as well as newly-developed fields like categorical topology and topological dynamics. Each chapter may be read independently of the others, with a few exceptions. It is assumed that the reader has some knowledge of set theory, algebra, analysis and basic general topology.

  17. Topological quantization of gravitational fields

    International Nuclear Information System (INIS)

    Patino, Leonardo; Quevedo, Hernando

    2005-01-01

    We introduce the method of topological quantization for gravitational fields in a systematic manner. First we show that any vacuum solution of Einstein's equations can be represented in a principal fiber bundle with a connection that takes values in the Lie algebra of the Lorentz group. This result is generalized to include the case of gauge matter fields in multiple principal fiber bundles. We present several examples of gravitational configurations that include a gravitomagnetic monopole in linearized gravity, the C-energy of cylindrically symmetric fields, the Reissner-Nordstroem and the Kerr-Newman black holes. As a result of the application of the topological quantization procedure, in all the analyzed examples we obtain conditions implying that the parameters entering the metric in each case satisfy certain discretization relationships

  18. Exploring the impact of customer relational benefit on relationship commitment in health service sectors.

    Science.gov (United States)

    Weng, Rhay-Hung; Huang, Jin-An; Huang, Ching-Yuan; Huang, Shih-Chang

    2010-01-01

    An increasing number of health service sectors have begun to implement relationship marketing to try to establish long-term relationship with customers. Customer relational benefit has been an important subject for relationship marketing researchers. This study was conducted to investigate how customer relational benefit might influence relationship commitment in health service sectors. The research used a questionnaire survey that retrieved a total number of 403 valid questionnaires. The data were collected by way of personal visits and investigations of outpatients in three regional hospitals in Taiwan. After the reliability and the validity of the questionnaire sample were examined, the data were verified by using hierarchical regression analysis. Results showed that confidence benefit constituted the most pronounced factor for hospital customers. Confidence benefit, social benefit, and special treatment benefit were perceived by customers as the key factors that have a positive influence on relationship commitment. In particular, customers placing greater emphasis on confidence benefit tended to be less willing to establish relationship commitment. When health service managers develop marketing strategies using customer relational benefit, they will still need to enhance customer confidence benefit as one of the main ways of achieving future improvements. In the event where health service managers seek to install resources for establishing and maintaining a good relationship commitment with customers, the crucial factors of social and special treatment benefits should not be ignored when seeking to enhance the customers' perception of confidence benefit.

  19. General Topology of the Universe

    OpenAIRE

    Pandya, Aalok

    2002-01-01

    General topology of the universe is descibed. It is concluded that topology of the present universe is greater or stronger than the topology of the universe in the past and topology of the future universe will be stronger or greater than the present topology of the universe. Consequently, the universe remains unbounded.

  20. Synchronization in complex networks with switching topology

    International Nuclear Information System (INIS)

    Wang, Lei; Wang, Qing-guo

    2011-01-01

    This Letter investigates synchronization issues of complex dynamical networks with switching topology. By constructing a common Lyapunov function, we show that local and global synchronization for a linearly coupled network with switching topology can be evaluated by the time average of second smallest eigenvalues corresponding to the Laplacians of switching topology. This result is quite powerful and can be further used to explore various switching cases for complex dynamical networks. Numerical simulations illustrate the effectiveness of the obtained results in the end. -- Highlights: → Synchronization of complex networks with switching topology is investigated. → A common Lyapunov function is established for synchronization of switching network. → The common Lyapunov function is not necessary to monotonically decrease with time. → Synchronization is determined by the second smallest eigenvalue of its Laplacian. → Synchronization criterion can be used to investigate various switching cases.

  1. Mars - The relationship of robotic and human elements in the IAA International Exploration of Mars study

    Science.gov (United States)

    Marov, Mikhail YA.; Duke, Michael B.

    1993-01-01

    The roles of human and robotic missions in Mars exploration are defined in the context of the short- and long-term Mars programs. In particular, it is noted that the currently implemented and planned missions to Mars can be regarded as robotic precursor missions to human exploration. Attention is given to factors that must be considered in formulating the rationale for human flights to Mars and future human Mars settlements and justifying costly projects.

  2. Exploring Coworker Relationships: Antecedents and Dimensions of Interpersonal Fit, Coworker Satisfaction, and Relational Models

    OpenAIRE

    Byington, Eliza

    2013-01-01

    textabstractManagement scholarship has revealed the myriad ways in which relationships between coworkers impact individual, team, and organizational phenomena. However, our scientific understanding of coworker relationships and what makes for satisfying connections with colleagues is still in its early days. This dissertation helps advance our understanding by proposing new drivers of coworker satisfaction, unpacking the nature of coworker satisfaction itself, and examining the sources and an...

  3. A topological derivative method for topology optimization

    DEFF Research Database (Denmark)

    Norato, J.; Bendsøe, Martin P.; Haber, RB

    2007-01-01

    resource constraint. A smooth and consistent projection of the region bounded by the level set onto the fictitious analysis domain simplifies the response analysis and enhances the convergence of the optimization algorithm. Moreover, the projection supports the reintroduction of solid material in void......We propose a fictitious domain method for topology optimization in which a level set of the topological derivative field for the cost function identifies the boundary of the optimal design. We describe a fixed-point iteration scheme that implements this optimality criterion subject to a volumetric...... regions, a critical requirement for robust topology optimization. We present several numerical examples that demonstrate compliance minimization of fixed-volume, linearly elastic structures....

  4. EXPLORING THE RELATIONSHIP BETWEEN ENTREPRENEURSHIP AND UNEMPLOYMENT RATE IN INDUSTRIAL SECTOR OF AZARBAYJAN-E-SHARGI

    Directory of Open Access Journals (Sweden)

    Mohammad Hasan Kheiravar

    2012-12-01

    Full Text Available Employment is one of the core requirements of society, and unemployment is the origin of many economic, social, and cultural anomalies. Therefore, the necessity of investigating the current status of unemployment in Azarbayjan-e-Shargi province as well as the heavy responsibility of the central government and local officials to generate employment and alleviate unemployment, come into prominence. Accordingly, entrepreneurship as a key tool for creating jobs and reducing unemployment rate takes on an increasing importance among the country's experts and policymakers. A great deal of uncertainty surrounding the kind of relationship between entrepreneurship and unemployment exists in developing countries. Some experts argue that there is a positive relationship between these two economic variables, i.e., as unemployment rate rises after a few-year interval, entrepreneurship rate also increases. In contrast, some experts indicate an inverse relationship between entrepreneurship and employment, i.e., promotion of entrepreneurial activities decreases the rate of unemployment. This study investigates the relationship between entrepreneurship and unemployment rate in the industry of Azarbayjan-e-Shargi Province in Iran. Vector auto-regression (VAR econometrics was employed in examining this relationship. The findings indicated that an inverse relationship exist between entrepreneurship and unemployment rate in industrial sector of Azarbayjan-e-Shargi.

  5. A knowledge discovery approach to explore some Sun/Earth's climate relationships

    Science.gov (United States)

    Pou, A.; Valdes, J.

    2009-09-01

    Recent developments in data driven modeling and analysis including computational intelligence techniques may throw new light on the exploration of possible solar activity/Earth's climate relationships. Here we present three different examples of methodologies under development and some preliminary results. a) Multivariate Time Series Model Mining (MVTSMM) analysis [1] and Genetic Programming were applied to Greenland's CRETE Site-E ice core Delta O18/16 values (1721-1983, one year interval sampling) and with sunspots activity (International Sunspots Number) during the same time span [2]. According to the results (1771 to 1933 period) indicated by the lag importance spectrum obtained with MVTSMM analysis, the sun's activity itself shows high internal variability and is inhomogeneous. The Dalton minimum, a low activity period usually considered to occur between 1790 and 1830, is shown to be a complex structure beginning about 1778 and ending in 1840. Apparently, the system entered a new state in 1912. In the joint analysis, the analytical tool uses extensively the solar activity data to explain the Delta O18/16 data, showing areas of stable patterns, lag drifts and abrupt pattern disruptions, indicating changes of state in the solar processes of several kinds at different times. b) A similar MVTSMM analysis was conducted on Central England Temperature (CET) and solar activity data using Group Sunspots Number (GSN) with a useful interpretive span of time from 1771 to 1916. The joint analysis involved large amounts of solar activity variables, except for the 1843-1862 and 1877-1889 periods where the discovered models used much less information from GSN data. As with the Crete-E/ISN analysis the lag importance spectrum of CET/GSN shows a number of clear discontinuities. A quarter of them are present in both (1778-1779, 1806, 1860-1862, 1912-1913). These experiments were designed for testing methodologies and not for specific hypothesis testing. However, it seems that

  6. Topological Crystalline Insulators and Dirac Octets in Anti-perovskites

    OpenAIRE

    Hsieh, Timothy H.; Liu, Junwei; Fu, Liang

    2014-01-01

    We predict a new class of topological crystalline insulators (TCI) in the anti-perovskite material family with the chemical formula A$_3$BX. Here the nontrivial topology arises from band inversion between two $J=3/2$ quartets, which is described by a generalized Dirac equation for a "Dirac octet". Our work suggests that anti-perovskites are a promising new venue for exploring the cooperative interplay between band topology, crystal symmetry and electron correlation.

  7. Exploring the Relationship between Health Insurance, Social Connectedness, and Subjective Social Status among Residents of O‘ahu

    OpenAIRE

    Thompson, Lisa M; Murray, Kate A; Jarvis, Sarah; Scarr, Ellen

    2016-01-01

    Relative position in a social hierarchy, or subjective social status, has been associated with indicators of socioeconomic status and may be influenced by social connectedness. The primary purpose of this study is to explore the relationship between health insurance status and subjective social status, using the MacArthur Scale of Subjective Social Status (SSS, community version), in the state of Hawai'i with its highly insured population. The secondary purpose is to examine other social dete...

  8. Exploring the Relationships Between Just-In-Time Technique and Manufacturing Performance: Empirical Evidence From Selected Nigerian Firms

    OpenAIRE

    Ph. D. John Kolade Obamiro

    2009-01-01

    This study explores the relationship between just-in-time technique and manufacturing performance of some selected Nigerian companies. Just-in time was considered to be an overall organisational phenomenon. Data were obtained through a structured questionnaire from a sample size of 300 knowledgeable employees to test the developed model and formulated hypotheses that cover both just-intime and the supporting infrastructures. Bivariate correlation analysis was used to test the three hypotheses...

  9. Identification of miRNA-mRNA regulatory modules by exploring collective group relationships.

    Science.gov (United States)

    Masud Karim, S M; Liu, Lin; Le, Thuc Duy; Li, Jiuyong

    2016-01-11

    microRNAs (miRNAs) play an essential role in the post-transcriptional gene regulation in plants and animals. They regulate a wide range of biological processes by targeting messenger RNAs (mRNAs). Evidence suggests that miRNAs and mRNAs interact collectively in gene regulatory networks. The collective relationships between groups of miRNAs and groups of mRNAs may be more readily interpreted than those between individual miRNAs and mRNAs, and thus are useful for gaining insight into gene regulation and cell functions. Several computational approaches have been developed to discover miRNA-mRNA regulatory modules (MMRMs) with a common aim to elucidate miRNA-mRNA regulatory relationships. However, most existing methods do not consider the collective relationships between a group of miRNAs and the group of targeted mRNAs in the process of discovering MMRMs. Our aim is to develop a framework to discover MMRMs and reveal miRNA-mRNA regulatory relationships from the heterogeneous expression data based on the collective relationships. We propose DIscovering COllective group RElationships (DICORE), an effective computational framework for revealing miRNA-mRNA regulatory relationships. We utilize the notation of collective group relationships to build the computational framework. The method computes the collaboration scores of the miRNAs and mRNAs on the basis of their interactions with mRNAs and miRNAs, respectively. Then it determines the groups of miRNAs and groups of mRNAs separately based on their respective collaboration scores. Next, it calculates the strength of the collective relationship between each pair of miRNA group and mRNA group using canonical correlation analysis, and the group pairs with significant canonical correlations are considered as the MMRMs. We applied this method to three gene expression datasets, and validated the computational discoveries. Analysis of the results demonstrates that a large portion of the regulatory relationships discovered by

  10. Topology optimization approaches

    DEFF Research Database (Denmark)

    Sigmund, Ole; Maute, Kurt

    2013-01-01

    Topology optimization has undergone a tremendous development since its introduction in the seminal paper by Bendsøe and Kikuchi in 1988. By now, the concept is developing in many different directions, including “density”, “level set”, “topological derivative”, “phase field”, “evolutionary...

  11. Introduction to topology

    CERN Document Server

    Mendelson, Bert

    1990-01-01

    Highly regarded for its exceptional clarity, imaginative and instructive exercises, and fine writing style, this concise book offers an ideal introduction to the fundamentals of topology. It provides a simple, thorough survey of elementary topics, starting with set theory and advancing to metric and topological spaces, connectedness, and compactness. 1975 edition.

  12. Modeling Internet Topology Dynamics

    NARCIS (Netherlands)

    Haddadi, H.; Uhlig, S.; Moore, A.; Mortier, R.; Rio, M.

    Despite the large number of papers on network topology modeling and inference, there still exists ambiguity about the real nature of the Internet AS and router level topology. While recent findings have illustrated the inaccuracies in maps inferred from BGP peering and traceroute measurements,

  13. Topology from Neighbourhoods

    Directory of Open Access Journals (Sweden)

    Coghetto Roland

    2015-12-01

    If to each element x of a set X there corresponds a set B(x of subsets of X such that the properties VI, VII, VIII and VIV are satisfied, then there is a unique topological structure on X such that, for each x ∈ X, B(x is the set of neighborhoods of x in this topology.

  14. Reconfigurable topological photonic crystal

    Science.gov (United States)

    Shalaev, Mikhail I.; Desnavi, Sameerah; Walasik, Wiktor; Litchinitser, Natalia M.

    2018-02-01

    Topological insulators are materials that conduct on the surface and insulate in their interior due to non-trivial topology of the band structure. The edge states on the interface between topological (non-trivial) and conventional (trivial) insulators are topologically protected from scattering due to structural defects and disorders. Recently, it was shown that photonic crystals (PCs) can serve as a platform for realizing a scatter-free propagation of light waves. In conventional PCs, imperfections, structural disorders, and surface roughness lead to significant losses. The breakthrough in overcoming these problems is likely to come from the synergy of the topological PCs and silicon-based photonics technology that enables high integration density, lossless propagation, and immunity to fabrication imperfections. For many applications, reconfigurability and capability to control the propagation of these non-trivial photonic edge states is essential. One way to facilitate such dynamic control is to use liquid crystals (LCs), which allow to modify the refractive index with external electric field. Here, we demonstrate dynamic control of topological edge states by modifying the refractive index of a LC background medium. Background index is changed depending on the orientation of a LC, while preserving the topology of the system. This results in a change of the spectral position of the photonic bandgap and the topological edge states. The proposed concept might be implemented using conventional semiconductor technology, and can be used for robust energy transport in integrated photonic devices, all-optical circuity, and optical communication systems.

  15. Exploring the Relationship Between Social Anxiety and Bulimic Symptoms: Mediational Effects of Perfectionism Among Females

    Science.gov (United States)

    Menatti, Andrew R.; Weeks, Justin W.; Levinson, Cheri A.; McGowan, Maggie M.

    2013-01-01

    Previous findings indicate that social anxiety and bulimia co-occur at high rates; one mechanism that has been proposed to link these symptom clusters is perfectionism. We tested meditational models among 167 female undergraduates in which maladaptive evaluative perfectionism concerns (MEPC; i.e., critical self-evaluative perfectionism) mediated the relationship between social anxiety and bulimic symptoms. Results from a first model indicated that MEPC mediated the relationship between fear of public scrutiny and bulimia symptoms. This indirect effect was significant above and beyond the indirect effects of maladaptive body-image cognitions and perfectionism specific to pure personal standards. A second model was tested with MEPC mediating the relationship between social interaction anxiety and bulimia symptoms. Similar results were obtained; however, in this model, a significant direct effect remained after partialing out the indirect effect of the mediators. Theoretical implications are discussed. PMID:24932054

  16. Modernizing Relationship Therapy through Social Thermoregulation Theory: Evidence, Hypotheses, and Explorations

    Directory of Open Access Journals (Sweden)

    Hans IJzerman

    2017-05-01

    Full Text Available In the present article the authors propose to modernize relationship therapy by integrating novel sensor and actuator technologies that can help optimize people’s thermoregulation, especially as they pertain to social contexts. Specifically, they propose to integrate Social Thermoregulation Theory (IJzerman et al., 2015a; IJzerman and Hogerzeil, 2017 into Emotionally Focused Therapy by first doing exploratory research during couples’ therapy, followed by Randomized Clinical Trials (RCTs. The authors thus suggest crafting a Social Thermoregulation Therapy (STT as enhancement to existing relationship therapies. The authors outline what is known and not known in terms of social thermoregulatory mechanisms, what kind of data collection and analyses are necessary to better understand social thermoregulatory mechanisms to craft interventions, and stress the need to conduct RCTs prior to implementation. They further warn against too hastily applying these theoretical perspectives. The article concludes by outlining why STT is the way forward in improving relationship functioning.

  17. Exploring factors related to college student expertise in digital games and their relationships to academics

    Directory of Open Access Journals (Sweden)

    Hamlen Karla R.

    2017-06-01

    Full Text Available Digital game play is a common pastime among college students and monopolizes a great deal of time for many students. Researchers have previously investigated relationships between subject-specific game play and academics, but this study fulfills a need for research focusing on entertainment game strategies and how they relate to strategies and success in other contexts. Utilizing a survey of 191 undergraduate students, the goal was to investigate students’ digital game play habits, strategies, and beliefs that predict gaming expertise, and to determine if these relate to academic success. Factor analysis revealed three latent variables that predict expertise: dedication, solo mastery, and strategic play. Multiple regression analysis was used to determine whether these three components could also predict academic outcome variables. Findings point to the absence of a relationship between these variables and academic GPA, but to the presence of a tentative relationship between confidence in game play and confidence in personal control over academic success.

  18. An exploration of the nature of caring relationships in the writings of Florence Nightingale.

    Science.gov (United States)

    Wagner, Debra J; Whaite, Bonnie

    2010-12-01

    The purpose of this qualitative, historical field study was to identify the nature and attributes of caring relationships as depicted in the writings of Florence Nightingale. Latent content analysis was the methodology used for the discovery and analysis of words, ideas, and themes from selected Nightingale works. Five themes were identified that represented a caring relationship: attend to, attention to, nurture, competent, and genuine. These themes are congruent with Nightingale's threefold concept of nursing. Watson's carative factors were used to cross-validate the results. The findings of this study indicate that the phenomenon of caring relationships in nursing has been a part of our professional language since Victorian times. Historical research provides a sense of connectedness to nursing's past and contributes to the ongoing education of nurses and further development of the nursing profession.

  19. Employment as a Social Determinant of Health: A Systematic Review of Longitudinal Studies Exploring the Relationship between Employment Status and Physical Health

    Science.gov (United States)

    Hergenrather, Kenneth C.; Zeglin, Robert J.; McGuire-Kuletz, Maureen; Rhodes, Scott D.

    2015-01-01

    Purpose: To explore employment as a social determinant of health through examining the relationship between employment status and physical health. Method: The authors explored the causal relationship between employment status and physical health through conducting a systematic review of 22 longitudinal studies conducted in Finland, France, the…

  20. Exploring the Role of Faith-Based Organizations in Addressing Adolescent Relationship Abuse.

    Science.gov (United States)

    Li, Erica; Freedman, Lori R; Fernandez Y Garcia, Erik; Miller, Elizabeth

    2016-04-01

    Adolescent relationship abuse (ARA) is prevalent with significant health and social consequences. Faith-based organizations could play an important role in ARA prevention and intervention. Studies on the role of faith-based organizations in interpersonal violence have focused on adult survivor perspectives rather than adolescents. Focus groups and interviews were conducted with faith-based organization leaders, parents, and youth. Findings highlight that church leaders, parents, and youth all expect that faith-based organizations can play a role in educating teens about healthy relationships. Divergent perspectives about how faith-based organizations should address adolescent sexuality and privacy need to be addressed. © The Author(s) 2015.

  1. Exploring Relationship between Brand Equity and Customer Loyalty on Pharmaceutical Market

    Directory of Open Access Journals (Sweden)

    Jasmina Dlačić

    2014-09-01

    Full Text Available By maintaining continuous satisfaction and high level of the brand’s equity the customers express the intention of long-term buying of product and their choice spreads on other products in the organization’s portfolio. By developing a brand which represents value to the customers, the customers’ satisfaction will grow reinforcing relationship between satisfaction and brand development. Purpose of this paper is to obtain insight about the relationship between elements of brand equity and customer loyalty among self-medication products. The research results show that elements of brand equity do increase customer brand loyalty. But not all elements do contribute in the same manner.

  2. Cognitive styles in creative leadership practices: exploring the relationship between level and style.

    Science.gov (United States)

    Isaksen, Scott G; Babij, Barbara J; Lauer, Kenneth J

    2003-12-01

    This study investigated the relationship between two measures used to assist change and transformation efforts, the Kirton Adaption-Innovation Inventory which assesses style or manner of cognition and problem-solving, not level or capability, and the Leadership Practices Inventory which measures the extent to which leaders exhibit certain leadership behaviors associated with accomplishing extraordinary results. These two measures of level and style should be conceptually distinct and show no or only modest correlation. Analysis yielded statistically significant and meaningful relationships between scores on the Kirton inventory and two scales of the Leadership Practices Inventory. Implications and challenges for research and practice were outlined.

  3. Machine learning topological states

    Science.gov (United States)

    Deng, Dong-Ling; Li, Xiaopeng; Das Sarma, S.

    2017-11-01

    Artificial neural networks and machine learning have now reached a new era after several decades of improvement where applications are to explode in many fields of science, industry, and technology. Here, we use artificial neural networks to study an intriguing phenomenon in quantum physics—the topological phases of matter. We find that certain topological states, either symmetry-protected or with intrinsic topological order, can be represented with classical artificial neural networks. This is demonstrated by using three concrete spin systems, the one-dimensional (1D) symmetry-protected topological cluster state and the 2D and 3D toric code states with intrinsic topological orders. For all three cases, we show rigorously that the topological ground states can be represented by short-range neural networks in an exact and efficient fashion—the required number of hidden neurons is as small as the number of physical spins and the number of parameters scales only linearly with the system size. For the 2D toric-code model, we find that the proposed short-range neural networks can describe the excited states with Abelian anyons and their nontrivial mutual statistics as well. In addition, by using reinforcement learning we show that neural networks are capable of finding the topological ground states of nonintegrable Hamiltonians with strong interactions and studying their topological phase transitions. Our results demonstrate explicitly the exceptional power of neural networks in describing topological quantum states, and at the same time provide valuable guidance to machine learning of topological phases in generic lattice models.

  4. Exploring the Relationships among Race, Class, Gender, and Middle School Students' Perceptions of School Racial Climate

    Science.gov (United States)

    Watkins, Natasha D.; Aber, Mark S.

    2009-01-01

    Although school climate has been thought to be especially important for racial minority and poor students (Booker, 2006; Haynes, Emmons, & Ben-Avie, 1997), little research has explored the significance of racial climate for these students. Furthermore, research in the area has tended to treat race, socioeconomic class, and gender separately,…

  5. An Exploration of the Characteristics of Effective Undergraduate Peer-Mentoring Relationships

    Science.gov (United States)

    Douglass, April G.; Smith, Dennie L.; Smith, Lana J.

    2013-01-01

    In this article, we explored the effectiveness of peer mentoring of undergraduate education students enrolled in core curriculum, writing-intensive courses. The context for our study was the use of peer mentors in undergraduate education writing-intensive courses. Peer mentors who had previously taken the courses were selected and trained as…

  6. Exploring the Relationship between Tolerance of Ambiguity of EFL Learners and Their Vocabulary Knowledge

    Science.gov (United States)

    Basöz, Tutku

    2015-01-01

    Learning a new language is akin to exploring an unknown land as ambiguous situations are prevalent in language learning. Ambiguity tolerance, which can hinder or facilitate language learning, is considered as an important learning style. The purpose of the present study was to understand how tolerant/intolerant EFL learners are of foreign language…

  7. An Exploration of the Relationship between Training Grants and Profitability of UK Construction Companies

    Science.gov (United States)

    Abdel-Wahab, Mohamed; Dainty, Andrew R. J.; Ison, Stephen G.; Hazlehurst, Guy

    2008-01-01

    A levy/grant system exists in the UK construction industry to provide financial support for companies undertaking training activities. With the current UK government skills policy, there is an emphasis on ensuring that training support provided to employers is aimed at enhancing companies' profitability. This paper explores the profitability of…

  8. Exploring the Relationship between Workaholism Facets and Personality Traits: A Replication in American Workers

    Science.gov (United States)

    Aziz, Shahnaz; Tronzo, Casie L.

    2011-01-01

    In this study, we further explored whether any of the dimensions in the five-factor model of personality (i.e., openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism) were related to facets of workaholism (i.e., work involvement, work drive, and work enjoyment) in a sample of American workers in various…

  9. Exploring the Relationship between Human Resource Development Functions and the Mentoring Process: A Qualitative Study

    Science.gov (United States)

    Cole, Ann F.; McArdle, Geri; Clements, Kimberly D.

    2005-01-01

    Human resource development professionals are in a unique position to help organizations achieve maximum positive impact and avoid legal difficulties when implementing mentoring programs. This case study explored a formal mentoring program that was data-based and linked to HRD in order to advance the mentoring process as an effective individual and…

  10. An Exploration of the Relationships between Mentor Recruitment, the Implementation of Mentoring, and Mentors' Attitudes

    Science.gov (United States)

    Nasser-Abu Alhija, Fadia; Fresko, Barbara

    2014-01-01

    Mentoring of new teachers is generally examined from the viewpoint of the mentees. In the present study, mentoring is explored based on reports from mentors within the context of the Israeli induction program. Recruitment variables (selection and training) were examined in relation to mentoring implementation (frequency, initiation, regularity,…

  11. Recognizing Social Class in the Psychotherapy Relationship: A Grounded Theory Exploration of Low-Income Clients

    Science.gov (United States)

    Thompson, Mindi N.; Cole, Odessa D.; Nitzarim, Rachel S.

    2012-01-01

    The process of psychotherapy among 16 low-income clients was explored using grounded theory (Charmaz, 2006; Glaser & Strauss, 1967) in order to understand and identify their unique experiences and needs. Semistructured interviews were conducted with 12 women and 4 men who had attended at least 6 sessions of psychotherapy within 6 months of the…

  12. Exploring the Relationship between Global Quality and Group Engagement in Toddler Child Care Classrooms

    Science.gov (United States)

    Hooper, Alison; Hallam, Rena

    2017-01-01

    Toddlers' engagement with their social and physical environment is an important aspect of their experience in early care and education programs. The purpose of this research study was to examine how global quality relates to children's engagement in toddler child care classrooms. Additionally, this study explored how toddlers' group engagement…

  13. Emerging Trends in Topological Insulators and Topological ...

    Indian Academy of Sciences (India)

    tems can lead to a state that supports zero energy Majorana fermions .... orbital motion is a relativistic effect most pronounced in heavy ... 1D helical edge states appear within the gap with a linear disper- ... free fermion in 1D. .... less, and electrically neutral. ... to be used as a building block for the next generation topological.

  14. Exploring the relationship between a multidimensional and multifaceted burnout concept and self-rated performance

    NARCIS (Netherlands)

    Demerouti, E.; Verbeke, W.J.M.I.; Bakker, A.B.

    2005-01-01

    This study examines the relationship between burnout and performance among three samples of account managers. Using a multidimensional and multifaceted burnout instrument, the authors tried to uncover meaningful configurations based on the basic symptoms of burnout and the role members to whom these

  15. Exploring the Relationship between Cultural Intelligence, Transformational Leadership, and Burnout in Doctorate of Education Students

    Science.gov (United States)

    Stokes, D. Michelle.

    2013-01-01

    This correlational study used standard multiple regression to determine if there was a relationship between the factors of cultural intelligence (metacognitive CQ, cognitive CQ, motivational CQ, and behavioral CQ) and transformational leadership in doctoral students. This study also sought to determine the best predictor of burnout by using a…

  16. Implicit Theories about Intelligence and Growth (Personal Best) Goals: Exploring Reciprocal Relationships

    Science.gov (United States)

    Martin, Andrew J.

    2015-01-01

    Background: There has been increasing interest in growth approaches to students' academic development, including value-added models, modelling of academic trajectories, growth motivation orientations, growth mindsets, and growth goals. Aims: This study sought to investigate the relationships between implicit theories about intelligence…

  17. Exploring the Relationship between Institutional and Professional Autonomy: A Comparative Study between Portugal and Finland

    Science.gov (United States)

    Carvalho, Teresa; Diogo, Sara

    2018-01-01

    By comparing two distinct settings--Portugal and Finland--and based on previous studies revealing similar trends in both countries, this article analyses the relationship between institutional and academic autonomy in the higher education sector. Based on crosschecking of the literature review and 47 interviews with key actors in both the…

  18. Exploring the Relationship between Metacognitive Awareness and Listening Performance with Questionnaire Data

    Science.gov (United States)

    Goh, Christine C. M.; Hu, Guangwei

    2014-01-01

    This study sought to provide a nuanced understanding of the relationship between metacognitive awareness and listening performance by eliciting from 113 English-as-a-second-language (ESL) Chinese learners their metacognitive awareness with regard to knowledge of listening strategies used and perceptions of difficulty and anxiety following a…

  19. Do HRD Investment Strategies Pay? Exploring the Relationship between Lifelong Learning and Psychological Contracts.

    Science.gov (United States)

    Martin, Graeme; Pate, Judy; McGoldrick, Jim

    1999-01-01

    A four-year study of a Scottish manufacturer's employee lifelong learning program discovered a positive relationship between the program and employee perceptions of careers, fairness, and the long-term "psychological contract." Due to reduction in the employer's commitment to job security, employees were beginning to view the program as…

  20. Exploring Relationships between Presage Variables of Florida Preservice Agricultural Education Teachers Related to Teaching Contextualized Mathematics

    Science.gov (United States)

    Stripling, Christopher T.; Roberts, T. Grady

    2013-01-01

    The purpose of this exploratory study was to investigate the relationships between mathematics ability, personal mathematics efficacy, mathematics teaching efficacy, personal teaching efficacy, and background characteristics of preservice agricultural education teachers. Data were collected for two years at the University of Florida. Fourteen…

  1. The Link between Organizational Learning Culture and Customer Satisfaction: Confirming Relationship and Exploring Moderating Effect

    Science.gov (United States)

    Pantouvakis, Angelos; Bouranta, Nancy

    2013-01-01

    Purpose: The aim of this paper is to develop a theoretical framework and conduct an empirical study across different service sectors to investigate the inter-relationships between organizational learning culture, employee job satisfaction and their impact on customer satisfaction. It also aims to examine an individual-level variable (educational…

  2. Identifying and Exploring Relationships between Contextual Situations and Ordinary Differential Equations

    Science.gov (United States)

    Camacho-Machín, M.; Guerrero-Ortiz, C.

    2015-01-01

    The aim of this paper is to present and discuss some of the evidence regarding the resources that students use when they establish relationships between a contextual situation and an ordinary differential equation (ODE). We present research results obtained from work by seven students in a graduate level course in mathematics education, where they…

  3. Educational Opportunity and Immigration in México: Exploring the Individual and Systemic Relationships

    Science.gov (United States)

    Martínez, José Felipe; Santibanez, Lucrecia; Serván Mori, Edson E.

    2013-01-01

    Background/Context: Much research has investigated the complex interplay between education and migration. Education has been alternatively conceptualized as playing an important role as motivator or deterrent of future migration. This relationship, however, is often investigated in terms of coarse indicators of educational attainment. Purpose: In…

  4. My Hero, My Friend: Exploring Honduran Youths' Lived Experience of the God-Individual Relationship

    Science.gov (United States)

    Mitchell, Monique B.; Silver, Christopher F.; Ross, Christopher F. J.

    2012-01-01

    Extensive social science research has focused on God image and God concept through the lens of attachment theory and the parental relationship. While vast theoretical frameworks exist, the authors suggest that more focused phenomenological research would shed light on adolescent lived experience within experiential descriptive language and…

  5. Exploring the Relationship between Student Involvement in GEAR UP and Academic Achievement

    Science.gov (United States)

    Kennedy, Renea F.

    2016-01-01

    The purpose of this study was to examine the relationship between GEAR UP academic support services and student achievement. GEAR UP is an evidence-based college readiness program. This study focused on a subset of academic support services designed to impact student achievement including: academic mentoring, math tutoring, English tutoring, study…

  6. Survey Explores Symbiotic Relationship between China’s Nonofficial Finance and SMEs

    Institute of Scientific and Technical Information of China (English)

    虞群娥; 李爱喜

    2008-01-01

    Domestic and foreign studies have revealed the existence of an interactive development relationship between nono cial nance and small and medium-sizedenterprises.Based on the empirical findings of a Hangzhou case study,this article substantiates the existence of a very strong symbiotic relationship between China’s nono cial nance and small and medium-sized enterprises(SMEs).This symbiotic relationship is an equilibrium outcome among three market players:formalnance,nono cial nance and SMEs.Meanwhile,it is also a rational choice and suboptimal equilibrium point reached under the existing institutional spaceconstraints.In our empirical study,we found that formal nance failure left a space for symbiosis to survive in two ways:the comparative advantages of nono cialnance created an institutional basis for symbiosis to grow,and immense SME fund shortages created a market space for symbiosis to thrive.In this article,we alsoput forward some recommendations for further development of such a symbiotic relationship.

  7. The Relationship between Engagement in Cocurricular Activities and Academic Performance: Exploring Gender Differences

    Science.gov (United States)

    Zacherman, Avi; Foubert, John

    2014-01-01

    The effects of time spent in cocurricular activities on academic performance was tested. A curvilinear relationship between hours per week spent involved in cocurricular activities and grade point average was discovered such that a low amount of cocurricular involvement was beneficial to grades, while a high amount can potentially hurt academic…

  8. Patterns among the ashes: Exploring the relationship between landscape pattern and the emerald ash borer

    Science.gov (United States)

    Susan J. Crocker; Dacia M. Meneguzzo; Greg C. Liknes

    2010-01-01

    Landscape metrics, including host abundance and population density, were calculated using forest inventory and land cover data to assess the relationship between landscape pattern and the presence or absence of the emerald ash borer (EAB) (Agrilus planipennis Fairmaire). The Random Forests classification algorithm in the R statistical environment was...

  9. Exploring Third-Grade Student Model-Based Explanations about Plant Relationships within an Ecosystem

    Science.gov (United States)

    Zangori, Laura; Forbes, Cory T.

    2015-01-01

    Elementary students should have opportunities to develop scientific models to reason and build understanding about how and why plants depend on relationships within an ecosystem for growth and survival. However, scientific modeling practices are rarely included within elementary science learning environments and disciplinary content is often…

  10. "Irreplaceable": Exploring Identity and Relationships through the Discussion of Invaluable Personal Objects

    Science.gov (United States)

    Scharp, Kristina M.; Canfield, Clair

    2017-01-01

    Courses: Interpersonal Communication, Family Communication, Relational Communication. Objectives: Students reflect on and discuss how personal objects are connected to their identity and relationships with others. This activity illustrates the ways course concepts such as relational metaphors, stories, rules, rituals, and other patterns of…

  11. Exploring the Link Between Daily Relationship Quality, Sexual Desire, and Sexual Activity in Couples

    NARCIS (Netherlands)

    Dewitte, Marieke; Mayer, Axel

    2018-01-01

    Current models of sexual responding emphasize the role of contextual and relational factors in shaping sexual behavior. The present study used a prospective diary design to examine the temporal sequence and variability of the link between sexual and relationship variables in a sample of couples.

  12. Commitment and the New Employment Relationship : Exploring a Forgotten Perspective: Employers Commitment

    NARCIS (Netherlands)

    Torka, Nicole; Looise, Jan Kees; van Riemsdijk, Maarten

    2005-01-01

    In this article, we have endeavoured to integrate the concept 'employers’ commitment' into the understanding of the new employment relationship. HRM scholars and practitioners assume that changes in (international) market and employee characteristics lead to a transformation of the employer-employee

  13. Exploring How Technology Mediates the Types of Relationships Formed in Sociotechnical Systems

    Science.gov (United States)

    Chu, Kar-Hai

    2012-01-01

    This work presents an exploratory study of how technology mediates the different types of relationships that are formed in sociotechnical systems. More people each day are connecting with each other through social networks, online communities, and other forms of virtual environments. Whether for education, information seeking, friendship,…

  14. Exploring the Relationship between Undergraduate Service-Learning Experiences and Global Perspective-Taking

    Science.gov (United States)

    Engberg, Mark E.; Fox, Katherine

    2011-01-01

    This study examines the relationship between service-learning participation and global perspective-taking. A global perspective is broadly defined to include both the acquisition of knowledge, attitudes, and skills important to intercultural communication and the development of more complex epistemological processes, identities, and interpersonal…

  15. Exploring the influence of trust relationships on motivation in the health sector: a systematic review.

    Science.gov (United States)

    Okello, Dickson R O; Gilson, Lucy

    2015-03-31

    Dedicated and motivated health workers (HWs) play a major role in delivering efficient and effective health services that improve patients' experience of health care. Growing interest in HW motivation has led to a global focus on pay for performance strategies, but less attention has been paid to nurturing intrinsic motivation. Workplace trust relationships involve fair treatment and respectful interactions between individuals. Such relationships enable cooperation among HWs and their colleagues, supervisors, managers and patients and may act as a source of intrinsic motivation. This paper presents findings from a qualitative systematic review of empirical studies providing evidence on HW motivation, to consider what these studies suggest about the possible influence of workplace trust relationships over motivation. Five electronic databases were searched for articles reporting research findings about HW motivation for various cadres published in the 10-year period 2003 to 2013 and with available full free text in the English language. Data extraction involved consideration of the links between trust relationships and motivation, by identifying how studies directly or indirectly mention and discuss relevant factors. Twenty-three articles from low- and middle-income countries and eight from high-income countries that met predetermined quality and inclusion criteria were appraised and subjected to thematic synthesis. Workplace trust relationships with colleagues, supervisors and managers, employing organisation and patients directly and indirectly influence HW motivation. Motivational factors identified as linked to trust include respect; recognition, appreciation and rewards; supervision; teamwork; management support; autonomy; communication, feedback and openness; and staff shortages and resource inadequacy. To the authors' knowledge, this is the first systematic review on trust and motivation in the health sector. Evidence indicates that workplace trust

  16. Exploring the Relationship Between Stereotype Perception and Residents' Well-Being.

    Science.gov (United States)

    Salles, Arghavan; Mueller, Claudia M; Cohen, Geoffrey L

    2016-01-01

    Medicine has historically been a male-dominated field, and there remains a stereotype that men are better physicians than women. For female residents, and in particular female surgical residents, chronically contending with this stereotype can exact a toll on their psychological health. The objective of this study was to determine the relationship between women surgeons' psychological health and their perception of other people's endorsement of the stereotype (stereotype perception). This is a correlational study based on survey data collected from 14 residency programs at one medical center from September 2010 to March 2011. The participants were 384 residents (representing an 80% response rate). The main survey measures were the Dupuy Psychological General Well-Being Scale and the Maslach Burnout Inventory. Among female surgical residents, we found that those with higher degrees of stereotype perception had poorer psychological health than those with lower degrees of stereotype perception (β = -0.44, p = 0.002). For men, there was no relationship between stereotype perception and psychological health (β = 0.015; p = 0.92). Among nonsurgeons, there was no relationship between stereotype perception and psychological health for either women or men (β = -0.016; p = 0.78; β = -0.0050; p = 0.97, respectively). The data suggest that women in surgical training, but not men, can face a stressor--stereotype perception--that is negatively associated with their psychological health. This same relationship does not seem to exist for women in nonsurgical training programs. Efforts should be made to further understand this relationship and investigate possible interventions to level the playing field for male and female surgical trainees. Copyright © 2016 American College of Surgeons. Published by Elsevier Inc. All rights reserved.

  17. Exploring the relationship between stress and acne: a medical student’s perspective

    Directory of Open Access Journals (Sweden)

    Maleki A

    2018-04-01

    Full Text Available Aryan Maleki, Noorulain Khalid Faculty of Medicine, Barts and The London School of Medicine and Dentistry, London, UKWe read with great interest the paper by Zari and Alrahmani1 investigating the relationship between stress and acne among female medical students. These findings are relevant as around 20% of young people are affected by moderate-to-severe acne, and indeed acne severity is associated with increased risks of anxiety, depression and suicidal ideation.2 The authors identified that “stress severity strongly correlated with an increase in acne severity,” and suggested that stress likely has an important role in the pathogenesis of acne.1 However, the paper could have been taken further to better establish the true extent of this relationship, and ultimately whether certain patients will benefit from clinical interventions based on their perceived stress scale. View the original paper by Zari and Alrahmani.

  18. Exploring the Relationship between Burnout and Critical Thinking Skills among Iranian University Professors Teaching TEFL

    Directory of Open Access Journals (Sweden)

    Hossein Khodabakhshzadeh

    2017-10-01

    Full Text Available The profession as a teacher involves experiencing a number of challenges which naturally lead to emotional tiredness and lack of reward, technically known as burnout (Colomeischi, 2015. The goal of the present study was to investigate the relationship between burnout and critical thinking ability. To this end, a sample of 40 professors of Teaching English as a Foreign Language (TEFL filed at a number of universities in Iran was chosen. Maslach Burnout Inventory (MBI was employed to assess the participants' burnout level, which is specifically evaluated by measuring three subscales of emotional exhaustion, depersonalization, and personal achievement. In addition, the measures of the participants' critical thinking skills were obtained via Watson-Glaser Critical Thinking Appraisal (WGCTA. The Pearson correlation coefficient analysis indicated that emotional exhaustion and depersonalization strongly and negatively correlated with critical thinking ability. However, a strong and positive relationship was found between personal achievement and critical thinking skills.

  19. Exploring the Relationship Between Business Model Innovation, Corporate Sustainability, and Organisational Values within the Fashion Industry

    DEFF Research Database (Denmark)

    Pedersen, Esben Rahbek Gjerdrum; Gwozdz, Wencke; Hvass, Kerli Kant

    2018-01-01

    their origin in the fundamental principles guiding the organisation. In addition, the study also finds a positive relationship between the core organisational values and financial performance. The analysis of the paper is based on survey responses from 492 managers within the Swedish fashion industry.......The objective of this paper is to examine the relationship between business model innovation, corporate sustainability, and the underlying organisational values. Moreover, the paper examines how the three dimensions correlate with corporate financial performance. It is concluded that companies...... with innovative business models are more likely to address corporate sustainability and that business model innovation and corporate sustainability alike are typically found in organisations rooted in values of flexibility and discretion. Business model innovation and corporate sustainability thus seem to have...

  20. Exploring the Relationships among Service Quality, Satisfaction, Trust and Store Loyalty among Retail Customers

    Directory of Open Access Journals (Sweden)

    Çerri Shpëtim

    2012-12-01

    Full Text Available The purpose of the study is to investigate the relationships among service quality, satisfaction, trust, and store loyalty in a retailing context. All these variables have considerable importance on store performance, measured by financial indicators or market ones. The data were collected from a sample of 258 students at two universities in Albania, during the first quarter of 2012. The items included in the survey measured the variables of the study as well as demographic characteristics of the sample. Confirmatory factor analysis (CFA and structural equation modeling (SEM were used to evaluate the hypotheses regarding relationships among model constructs. All the hypotheses developed in the study were positively confirmed, reinforcing the theory and previous research on this field. The study also reveals interesting implications in service quality, satisfaction, trust, and store loyalty, useful to both academics and practitioners. Managers will find this research helpful in better understanding these variables and their roles on their companies’ performance.

  1. The topology of moduli space and quantum field theory

    International Nuclear Information System (INIS)

    Montano, D.; Sonnenschein, J.

    1989-01-01

    We show how an SO(2,1) gauge theory with a fermionic symmetry may be used to describe the topology of the moduli space of curves. The observables of the theory correspond to the generators of the cohomology of moduli space. This is an extension of the topological quantum field theory introduced by Witten to investigate the cohomology of Yang-Mills instanton moduli space. We explore the basic structure of topological quantum field theories, examine a toy U(1) model, and then realize a full theory of moduli space topology. We also discuss why a pure gravity theory, as attempted in previous work, could not succeed. (orig.)

  2. An Empirical Exploration of Relationships Between Personal Values and Spectator Sport Consumption

    OpenAIRE

    Li-Shiue Gau; Jeffrey D. James

    2014-01-01

    This study examined relationships between personal life values and spectator sport consumption. From Kahle (1983), Rokeach (1973), and Schwartz (1992, 1996) value systems, twenty-eight personal values were identified probably relevant to spectator sport consumption for inclusion in a survey. A questionnaire was designed to assess the importance of each value and the frequency of spectator sport consumption. The questionnaires were administered through which 384 participants rated the importan...

  3. Exploring the relationship between service quality and customer satisfaction in Croatian hotel industry

    OpenAIRE

    Suzana Marković; Sanja Raspor Janković

    2013-01-01

    Purpose – The purpose of the present study was to examine the relationship between service quality and customer satisfaction. The main objective was to discuss the impact of perceived service quality dimensions on customer satisfaction in the hotel industry in Croatia. Methodology – The data were collected using self-administered questionnaire. The questionnaire consisted of three parts. First, perceived service quality was measured using modified SERVQUAL model. Second, customer satisfact...

  4. Sleep and Inflammatory Bowel Disease: Exploring the Relationship Between Sleep Disturbances and Inflammation

    OpenAIRE

    Kinnucan, Jami A.; Rubin, David T.; Ali, Tauseef

    2013-01-01

    Sleep disturbances are associated with a greater risk of serious adverse health events, economic consequences, and, most importantly, increased all-cause mortality. Several studies support the associations among sleep, immune function, and inflammation. The relationship between sleep disturbances and inflammatory conditions is complex and not completely understood. Sleep deprivation can lead to increased levels of inflammatory cytokines, including interleukin (IL)-1β IL-6, tumor necrosis fact...

  5. Exploring the Relationship between Skeletal Mass and Total Body Mass in Birds.

    Science.gov (United States)

    Martin-Silverstone, Elizabeth; Vincze, Orsolya; McCann, Ria; Jonsson, Carl H W; Palmer, Colin; Kaiser, Gary; Dyke, Gareth

    2015-01-01

    Total body mass (TBM) is known to be related to a number of different osteological features in vertebrates, including limb element measurements and total skeletal mass. The relationship between skeletal mass and TBM in birds has been suggested as a way of estimating the latter in cases where only the skeleton is known (e.g., fossils). This relationship has thus also been applied to other extinct vertebrates, including the non-avian pterosaurs, while other studies have used additional skeletal correlates found in modern birds to estimate TBM. However, most previous studies have used TBM compiled from the literature rather than from direct measurements, producing values from population averages rather than from individuals. Here, we report a new dataset of 487 extant birds encompassing 79 species that have skeletal mass and TBM recorded at the time of collection or preparation. We combine both historical and new data for analyses with phylogenetic control and find a similar and well-correlated relationship between skeletal mass and TBM. Thus, we confirm that TBM and skeletal mass are accurate proxies for estimating one another. We also look at other factors that may have an effect on avian body mass, including sex, ontogenetic stage, and flight mode. While data are well-correlated in all cases, phylogeny is a major control on TBM in birds strongly suggesting that this relationship is not appropriate for estimating the total mass of taxa outside of crown birds, Neornithes (e.g., non-avian dinosaurs, pterosaurs). Data also reveal large variability in both bird skeletal and TBM within single species; caution should thus be applied when using published mass to test direct correlations with skeletal mass and bone lengths.

  6. An Exploration Of The Relationship Between Leadership Styles And The Implementation Of Transformation Interventions

    OpenAIRE

    J. Naidu; M. S. van der Walt

    2005-01-01

    The objective of this research was to determine whether a relationship exists between the way in which subordinates experience their managers’ leadership styles and the influence of such leadership styles on the implementation of transformation interventions. A two-phase triangulated research design was employed where the qualitative phase preceded the quantitative phase. Ninety six (N = 96) respondents from a mining company participated in the survey. Results indicate a statistical and meani...

  7. Supersymmetric Quantum Mechanics and Topology

    International Nuclear Information System (INIS)

    Wasay, Muhammad Abdul

    2016-01-01

    Supersymmetric quantum mechanical models are computed by the path integral approach. In the β→0 limit, the integrals localize to the zero modes. This allows us to perform the index computations exactly because of supersymmetric localization, and we will show how the geometry of target space enters the physics of sigma models resulting in the relationship between the supersymmetric model and the geometry of the target space in the form of topological invariants. Explicit computation details are given for the Euler characteristics of the target manifold and the index of Dirac operator for the model on a spin manifold.

  8. Relationship between Marketing Strategies and Governance Mechanisms: A Study in Exploration Chain Beef Cattle

    Directory of Open Access Journals (Sweden)

    Filipe Quevedo-Silva

    2015-09-01

    Full Text Available The relationship between actors has been unspoilt by marketing through the bias of Transaction Costs Economics. Some authors suggest that a marketing strategy can directly impact the transactional characteristics and hence the governance mechanisms chosen to coordinate transactions. Studies suggest that future work in the field of marketing include, among other factors, aspects related to the relationship between the actors. In this context, this article aims to analyze how marketing strategies can affect the choice of governance mechanisms. The study object is the chain of beef, view their representation to the national economy. To this end, we conducted a qualitative study using semi-structured interviews with various actors in the chain. It was possible to verify the existence of the relationship between marketing strategy and governance structure. In one of the cases, product differentiation, translated into more specific assets, led the producer to perform a relational contract with the fridge and to distribute your product, make an integration with retailers, through the opening of a boutique of meat. Factor that was not observed in transactions involving producers on products without distinction, for which the transactions via spot market are prevalent.  

  9. The interplay between online and offline explorations of identity, relationships, and sex: a mixed-methods study with LGBT youth.

    Science.gov (United States)

    DeHaan, Samantha; Kuper, Laura E; Magee, Joshua C; Bigelow, Lou; Mustanski, Brian S

    2013-01-01

    Although the Internet is commonly used by lesbian, gay, bisexual, and transgender (LGBT) youth to explore aspects of sexual health, little is known about how this usage relates to offline explorations and experiences. This study used a mixed-methods approach to investigate the interplay between online and offline explorations of multiple dimensions of sexual health, which include sexually transmitted infections, sexual identities, romantic relationships, and sexual behaviors. A diverse community sample of 32 LGBT youth (ages 16-24) completed semi-structured interviews, which were transcribed and then qualitatively coded to identify themes. Results indicated that, although many participants evaluated online sexual health resources with caution, they frequently used the Internet to compensate for perceived limitations in offline resources and relationships. Some participants turned to the Internet to find friends and romantic partners, citing the relative difficulty of establishing offline contact with LGBT peers. Further, participants perceived the Internet as an efficient way to discover offline LGBT events and services relevant to sexual health. These results suggest that LGBT youth are motivated to fill gaps in their offline sexual health resources (e.g., books and personal communications) with online information. The Internet is a setting that can be harnessed to provide support for the successful development of sexual health.

  10. Topology-function conservation in protein-protein interaction networks.

    Science.gov (United States)

    Davis, Darren; Yaveroğlu, Ömer Nebil; Malod-Dognin, Noël; Stojmirovic, Aleksandar; Pržulj, Nataša

    2015-05-15

    Proteins underlay the functioning of a cell and the wiring of proteins in protein-protein interaction network (PIN) relates to their biological functions. Proteins with similar wiring in the PIN (topology around them) have been shown to have similar functions. This property has been successfully exploited for predicting protein functions. Topological similarity is also used to guide network alignment algorithms that find similarly wired proteins between PINs of different species; these similarities are used to transfer annotation across PINs, e.g. from model organisms to human. To refine these functional predictions and annotation transfers, we need to gain insight into the variability of the topology-function relationships. For example, a function may be significantly associated with specific topologies, while another function may be weakly associated with several different topologies. Also, the topology-function relationships may differ between different species. To improve our understanding of topology-function relationships and of their conservation among species, we develop a statistical framework that is built upon canonical correlation analysis. Using the graphlet degrees to represent the wiring around proteins in PINs and gene ontology (GO) annotations to describe their functions, our framework: (i) characterizes statistically significant topology-function relationships in a given species, and (ii) uncovers the functions that have conserved topology in PINs of different species, which we term topologically orthologous functions. We apply our framework to PINs of yeast and human, identifying seven biological process and two cellular component GO terms to be topologically orthologous for the two organisms. © The Author 2015. Published by Oxford University Press.

  11. Signatures of topological superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Peng, Yang

    2017-07-19

    The prediction and experimental discovery of topological insulators brought the importance of topology in condensed matter physics into the limelight. Topology hence acts as a new dimension along which more and more new states of matter start to emerge. One of these topological states of matter, namely topological superconductors, comes into the focus because of their gapless excitations. These gapless excitations, especially in one dimensional topological superconductors, are Majorana zero modes localized at the ends of the superconductor and exhibit exotic nonabelian statistics, which can be potentially applied to fault-tolerant quantum computation. Given their highly interesting physical properties and potential applications to quantum computation, both theorists and experimentalists spend great efforts to realize topological supercondoctors and to detect Majoranas. In two projects within this thesis, we investigate the properties of Majorana zero modes in realistic materials which are absent in simple theoretical models. We find that the superconducting proximity effect, an essential ingredient in all existing platforms for topological superconductors, plays a significant role in determining the localization property of the Majoranas. Strong proximity coupling between the normal system and the superconducting substrate can lead to strongly localized Majoranas, which can explain the observation in a recent experiment. Motivated by experiments in Molenkamp's group, we also look at realistic quantum spin Hall Josephson junctions, in which charge puddles acting as magnetic impurities are coupled to the helical edge states. We find that with this setup, the junction generically realizes an exotic 8π periodic Josephson effect, which is absent in a pristine Josephson junction. In another two projects, we propose more pronounced signatures of Majoranas that are accessible with current experimental techniques. The first one is a transport measurement, which uses

  12. From geometry to topology

    CERN Document Server

    Flegg, H Graham

    2001-01-01

    This excellent introduction to topology eases first-year math students and general readers into the subject by surveying its concepts in a descriptive and intuitive way, attempting to build a bridge from the familiar concepts of geometry to the formalized study of topology. The first three chapters focus on congruence classes defined by transformations in real Euclidean space. As the number of permitted transformations increases, these classes become larger, and their common topological properties become intuitively clear. Chapters 4-12 give a largely intuitive presentation of selected topics.

  13. Topologically massive supergravity

    Directory of Open Access Journals (Sweden)

    S. Deser

    1983-01-01

    Full Text Available The locally supersymmetric extension of three-dimensional topologically massive gravity is constructed. Its fermionic part is the sum of the (dynamically trivial Rarita-Schwinger action and a gauge-invariant topological term, of second derivative order, analogous to the gravitational one. It is ghost free and represents a single massive spin 3/2 excitation. The fermion-gravity coupling is minimal and the invariance is under the usual supergravity transformations. The system's energy, as well as that of the original topological gravity, is therefore positive.

  14. Duality and topology

    Science.gov (United States)

    Sacramento, P. D.; Vieira, V. R.

    2018-04-01

    Mappings between models may be obtained by unitary transformations with preservation of the spectra but in general a change in the states. Non-canonical transformations in general also change the statistics of the operators involved. In these cases one may expect a change of topological properties as a consequence of the mapping. Here we consider some dualities resulting from mappings, by systematically using a Majorana fermion representation of spin and fermionic problems. We focus on the change of topological invariants that results from unitary transformations taking as examples the mapping between a spin system and a topological superconductor, and between different fermionic systems.

  15. Algebraic topology and concurrency

    DEFF Research Database (Denmark)

    Fajstrup, Lisbeth; Raussen, Martin; Goubault, Eric

    2006-01-01

    We show in this article that some concepts from homotopy theory, in algebraic topology,are relevant for studying concurrent programs. We exhibit a natural semantics of semaphore programs, based on partially ordered topological spaces, which are studied up to “elastic deformation” or homotopy...... differences between ordinary and directed homotopy through examples. We also relate the topological view to a combinatorial view of concurrent programs closer to transition systems, through the notion of a cubical set. Finally we apply some of these concepts to the proof of the safeness of a two...

  16. Topology general & algebraic

    CERN Document Server

    Chatterjee, D

    2007-01-01

    About the Book: This book provides exposition of the subject both in its general and algebraic aspects. It deals with the notions of topological spaces, compactness, connectedness, completeness including metrizability and compactification, algebraic aspects of topological spaces through homotopy groups and homology groups. It begins with the basic notions of topological spaces but soon going beyond them reaches the domain of algebra through the notions of homotopy, homology and cohomology. How these approaches work in harmony is the subject matter of this book. The book finally arrives at the

  17. Topological pregauge-pregeometry

    International Nuclear Information System (INIS)

    Akama, Keiichi; Oda, Ichiro.

    1990-12-01

    The pregauge-pregeometric action, i.e. the fundamental matter action whose quantum fluctuations give rise to the Einstein-Hilbert and the Yang-Mills actions is investigated from the viewpoint of the topological field theory. We show that the scalar pregauge-pregeometric action is a topological invariant for appropriate choices of the internal gauge group. This model realizes the picture that the gravitational and internal gauge theory at the low energy scale is induced as the quantum effects of the topological field theory at the Planck scale. (author)

  18. Elementary topology problem textbook

    CERN Document Server

    Viro, O Ya; Netsvetaev, N Yu; Kharlamov, V M

    2008-01-01

    This textbook on elementary topology contains a detailed introduction to general topology and an introduction to algebraic topology via its most classical and elementary segment centered at the notions of fundamental group and covering space. The book is tailored for the reader who is determined to work actively. The proofs of theorems are separated from their formulations and are gathered at the end of each chapter. This makes the book look like a pure problem book and encourages the reader to think through each formulation. A reader who prefers a more traditional style can either find the pr

  19. A Structural-Topological Analysis of the Relationship between Actors of Multiple Connections: Intercommunication between the European Union and the Eurasian Economic Union

    Directory of Open Access Journals (Sweden)

    Andrey Anisimov

    2016-09-01

    Full Text Available More than 100 years ago, the concept of quantization began to go beyond natural and physical sciences. For instance, quantum numbers are used to determine the electron configuration of an atom, the probable location of the atom’s electronsand other characteristics of atoms. The main idea of quantization is the application of “double nature” logic to observed processes and phenomena, as well as to their driving forces and structure. Based on this logic, the principle of wave –particle duality was developed in physics and mathematics and provides the basis for quantum mechanics and relativistic theory. This principle applied to analysis and calculations helps to formulate fundamental theories to explain processes and structure using relativistic velocity and, in turn, describe operations of the material world at the macro and micro levels. This article applies the concepts of quantization and representation duality (which is the analysis of the dual nature of facts and events observed at the macro and micro levels to social, economic and political data to describe the dynamics of actors and processes of the multiple connections of the global system. The analysis of the current state of world’s multiple connections in a macroeconomic context is conducted with inapproved parameters that characterize the dynamics of various changes that explain events in a two-dimensional manner.Often criticized by experts, these parameters have been supplemented by new ones, which have not yet resolved the flaw sin such a study of changes in economic processes. This article describes a theoretical concept of a structural-topological approach based on presenting global multiple connections in the form of two aggregated spaces – the space of events and the space of states – that complement each other to create a single system. The study demonstrates the representation method of the global economy illustrated through a practical analysis of integrational

  20. Acoustic topological insulator and robust one-way sound transport

    Science.gov (United States)

    He, Cheng; Ni, Xu; Ge, Hao; Sun, Xiao-Chen; Chen, Yan-Bin; Lu, Ming-Hui; Liu, Xiao-Ping; Chen, Yan-Feng

    2016-12-01

    Topological design of materials enables topological symmetries and facilitates unique backscattering-immune wave transport. In airborne acoustics, however, the intrinsic longitudinal nature of sound polarization makes the use of the conventional spin-orbital interaction mechanism impossible for achieving band inversion. The topological gauge flux is then typically introduced with a moving background in theoretical models. Its practical implementation is a serious challenge, though, due to inherent dynamic instabilities and noise. Here we realize the inversion of acoustic energy bands at a double Dirac cone and provide an experimental demonstration of an acoustic topological insulator. By manipulating the hopping interaction of neighbouring ’atoms’ in this new topological material, we successfully demonstrate the acoustic quantum spin Hall effect, characterized by robust pseudospin-dependent one-way edge sound transport. Our results are promising for the exploration of new routes for experimentally studying topological phenomena and related applications, for example, sound-noise reduction.

  1. A New Topology of Solutions of Chemical Equations

    International Nuclear Information System (INIS)

    Risteski, Ice B.

    2013-01-01

    In this work is induced a new topology of solutions of chemical equations by virtue of point-set topology in an abstract stoichiometrical space. Subgenerators of this topology are the coefficients of chemical reaction. Complex chemical reactions, as those of direct reduction of hematite with a carbon, often exhibit distinct properties which can be interpreted as higher level mathematical structures. Here we used a mathematical model that exploits the stoichiometric structure, which can be seen as a topology too, to derive an algebraic picture of chemical equations. This abstract expression suggests exploring the chemical meaning of topological concept. Topological models at different levels of realism can be used to generate a large number of reaction modifications, with a particular aim to determine their general properties. The more abstract the theory is, the stronger the cognitive power is

  2. Exploring relationship between value- and life-orientation and job satisfaction

    Directory of Open Access Journals (Sweden)

    L. Louw

    2012-12-01

    Full Text Available Purpose/objective: The purpose of this article is to investigate the relationship between value- and life-orientation and job satisfaction, as well as determining the influence of gender, age and cultural group within the selected South African organisational context. Problem investigated: The success of a diverse organisation in a complex globalised world is largely dependent on the values of managers, their life-orientation and their level of job satisfaction. Managers and employees, in a multicultural and diverse South African organisational context, need to be aware of and manage their similarities and differences in these aspects to contribute to overall organisational success. Design and/or research methodology and/or approach: In this exploratory research, use is made of a quantitative perspective in the positivist research paradigm. Value-orientations of managers (N = 30 at a selected parastatal organisation in the Eastern Cape Province in South Africa were measured by making use of the Schwartz Value Survey (SVS (Schwartz, 1992,1994; life-orientation, also referred to as Sense of Coherence (SOC, was assessed by using Antonovsky's (1997 Life Orientation Questionnaire as well as job satisfaction (JS using Smith, Kendall and Hulin's (1969's Job Descriptive Index. Data were analysed using the R statistical software package (R Development Core Team, 2010. Each of the three research instruments (SVS, SOC & JS considered in this study were used to calculate descriptive statistics and univariate statistical methodologies were used to test the various hypotheses. Findings and/or implementations: In terms of value-orientation, the value of benevolence (preservation and enhancement of the welfare of others was scored the highest by the managers, and a significant difference was found in the average value scale score of stimulation (excitement, novelty, and challenge in life and age. The findings with regard to life-orientation indicated that

  3. Exploring moderating effects of proactivity on the relationship between market information and innovation performance

    Directory of Open Access Journals (Sweden)

    Branka Ahlin

    2012-04-01

    Full Text Available Despite its importance, the relationship between market information and innovation performance has seldom been investigated in SMEs, much less in multiple-country settings. Given the limited body of knowledge on this important topic, the question of why some entrepreneurs use market information better than others for the purpose of innovation has yet to be addressed. In this study we propose that entrepreneur’s proactivity influences the effectiveness of market information in the innovation process. We propose a conceptual model and test it on SMEs from the United States and Slovenia. The paper concludes by discussing the implications of these results for entrepreneurship theory and practice.

  4. Exploring Value Cocreation in Relationships Between an ERP Vendor and its Partners

    DEFF Research Database (Denmark)

    Sarker, Suprateek; Sarker, Saonee; Sahaym, Arvin

    2012-01-01

    cocreation within business-to business(B2B) contexts. Using a revelatory case study of the relationship between an ERP vendor with a global reputation and its partners, and informed by the resource-based view of the firm and related theoretical perspectives, we develop an understanding of value cocreation...... in B2B alliances associated with selling, extending, and implementing packaged software, specifically ERP systems. Our study reveals that there are different mechanisms underlying value cocreation within B2B alliances, and also points to several categories of contingency factors that influence...

  5. Relationships between stratigraphy, deformation and thermal history in sedimentary basins. Impact of geodynamic concepts in petroleum exploration

    International Nuclear Information System (INIS)

    Sarmiento, Luis Fernando

    2002-01-01

    The natural processes that generate petroleum accumulations in a sedimentary basin require several ingredients: (1) the petroleum system elements: source, reservoir, seal and overburden rocks, which are the result of sedimentation processes in a subsiding basin; (2) petroleum traps, which in many cases are the result of deformation and (3) heat to convert suitable organic matter into petroleum. Although these different phenomena are considered independent at the scale of an oil field, at the lithosphere scale thermal phenomena, (2) vertical movements of the earth surface responsible for sedimentation and erosion and (3) tectonic deformation are not independent phenomena, physical quantitative laws intimately relate them. These mutual inter relationships are useful in petroleum exploration to predict one factor having knowledge of the others. Applications of these concepts can contribute to understand the tectonic history of complex areas, such as the Colombian sedimentary basins and reduce exploration risk

  6. Exploring the relationship between time management skills and the academic achievement of African engineering students - a case study

    Science.gov (United States)

    Swart, Arthur James; Lombard, Kobus; de Jager, Henk

    2010-03-01

    Poor academic success by African engineering students is currently experienced in many higher educational institutions, contributing to lower financial subsidies by local governments. One of the contributing factors to this low academic success may be the poor time management skills of these students. This article endeavours to explore this relationship by means of a theoretical literature review and an empirical study. Numerous studies have been conducted in this regard, but with mixed results. The case study of this article involves a design module termed Design Projects III, where the empirical study incorporated an ex post facto study involving a pre-experimental/exploratory design using descriptive statistics. The results of this study were applied to various tests, which indicated no statistically significant relationship between time management skills and the academic achievement of African engineering students.

  7. The Exploration of Political Conflicts and Personal Relationships in Ian McEwan’s The Innocent

    Directory of Open Access Journals (Sweden)

    Mina Abbasiyannejad

    2014-03-01

    Full Text Available Political conflicts have historically affected the relationships of nations. Ian McEwan’s The Innocent is an excellent example of a story set within the web of such a conflict—the Cold War—that was brought about by U.S. and Soviet confrontation over spheres of influence after the Second World War. This article aims to show how Ian McEwan pictures Americanization as a form of cultural politics aimed at spreading American influence throughout the occupied countries such as Germany for political domination. Max Weber’s theory of political power along with semiotics as a tool is the framework of the article. Signs that refer to the Americanization process, including inferences in the dialogues, gestures, choice of food, and even clothing, are scrutinized and interpreted within the socio-political context the of Cold War. The analysis of The Innocent provides an example of the ways in which fiction represents political conflicts permeating personal and intimate relationships, and how such conflicts may result in a sense of mistrust and intrigue among both people and nations.

  8. Of huge mice and tiny elephants: Exploring the relationship between inhibitory processes and preschool math skills

    Directory of Open Access Journals (Sweden)

    Rebecca eMerkley

    2016-01-01

    Full Text Available The cognitive mechanisms underpinning the well-established relationship between inhibitory control and early maths skills remain unclear. We hypothesised that a specific aspect of inhibitory control drives its association with distinct math skills in very young children: the ability to ignore stimulus dimensions that are in conflict with task-relevant representations. We used an Animal Size Stroop task in which three- to six-year-olds were required to ignore the physical size of animal pictures to compare their real-life dimensions. In Experiment 1 (N=58, performance on this task correlated with standardised early mathematics achievement. In Experiment 2 (N=48, performance on the Animal Size Stroop task related to the accuracy of magnitude comparison, specifically for trials on which the physical size of dot arrays was incongruent with their numerosity. This highlights a process-oriented relationship between interference control and resolving conflict between discrete and continuous quantity, and in turn calls for further detailed empirical investigations of whether, how and why inhibitory processes matter to emerging numerical cognition.

  9. Of Huge Mice and Tiny Elephants: Exploring the Relationship Between Inhibitory Processes and Preschool Math Skills.

    Science.gov (United States)

    Merkley, Rebecca; Thompson, Jodie; Scerif, Gaia

    2015-01-01

    The cognitive mechanisms underpinning the well-established relationship between inhibitory control and early maths skills remain unclear. We hypothesized that a specific aspect of inhibitory control drives its association with distinct math skills in very young children: the ability to ignore stimulus dimensions that are in conflict with task-relevant representations. We used an Animal Size Stroop task in which 3- to 6-year-olds were required to ignore the physical size of animal pictures to compare their real-life dimensions. In Experiment 1 (N = 58), performance on this task correlated with standardized early mathematics achievement. In Experiment 2 (N = 48), performance on the Animal Size Stroop task related to the accuracy of magnitude comparison, specifically for trials on which the physical size of dot arrays was incongruent with their numerosity. This highlights a process-oriented relationship between interference control and resolving conflict between discrete and continuous quantity, and in turn calls for further detailed empirical investigations of whether, how and why inhibitory processes matter to emerging numerical cognition.

  10. Exploring relationships of human-automation interaction consequences on pilots: uncovering subsystems.

    Science.gov (United States)

    Durso, Francis T; Stearman, Eric J; Morrow, Daniel G; Mosier, Kathleen L; Fischer, Ute; Pop, Vlad L; Feigh, Karen M

    2015-05-01

    We attempted to understand the latent structure underlying the systems pilots use to operate in situations involving human-automation interaction (HAI). HAI is an important characteristic of many modern work situations. Of course, the cognitive subsystems are not immediately apparent by observing a functioning system, but correlations between variables may reveal important relations. The current report examined pilot judgments of 11 HAI dimensions (e.g., Workload, Task Management, Stress/Nervousness, Monitoring Automation, and Cross-Checking Automation) across 48 scenarios that required airline pilots to interact with automation on the flight deck. We found three major clusters of the dimensions identifying subsystems on the flight deck: a workload subsystem, a management subsystem, and an awareness subsystem. Relationships characterized by simple correlations cohered in ways that suggested underlying subsystems consistent with those that had previously been theorized. Understanding the relationship among dimensions affecting HAI is an important aspect in determining how a new piece of automation designed to affect one dimension will affect other dimensions as well. © 2014, Human Factors and Ergonomics Society.

  11. Exploring the Relationship Between Resilience and Ostomy Adjustment in Adults With a Permanent Ostomy.

    Science.gov (United States)

    Scardillo, Jody; Dunn, Karen S; Piscotty, Ronald

    2016-01-01

    The aims of this study were to describe the relationship between resilience and ostomy adjustment in adults with permanent stomas and to determine if participants who report higher levels of resilience also report higher levels of adjustment to a permanent ostomy. Descriptive, correlational research design utilizing the Roy Adaptation Model as the theoretical framework was used. Persons with permanent stomas were recruited from ostomy support groups on the East Coast of the United States. The study sample included 48 respondents. Their mean age was 66 ± 12.7 years (mean ± SD); the majority (60.4%) were women, had an ileostomy (62.5%), and had a history of inflammatory bowel disease (62.5%). Respondents completed a questionnaire that queried demographic and pertinent clinical data, along with 2 previously validated instruments, the Resilience Scale and Ostomy Adjustment Inventory-23. The relationships between levels of resilience, levels of adjustment to an ostomy, and demographic characteristics were examined. Participants with higher levels of ostomy adjustment had higher levels of resilience than respondents who reported lower levels of ostomy adjustment (r = 0.65, P ≤ .01). Findings from this study suggest that higher levels of resilience facilitate adjustment to a permanent ostomy.

  12. Exploring the relationship between development and road traffic injuries: a case study from India.

    Science.gov (United States)

    Garg, Nitin; Hyder, Adnan A

    2006-10-01

    Road traffic injuries (RTI) are a major cause of mortality and disability in the world. Only after significant losses have communities in developed nations taken necessary steps to prevent crashes and their consequences. Increase in road safety is related to increasing socio-economic development. We aim to study the trends in injury and death rates in a developing country, India, define sub-national variations, and analyse these trends in relation to economic and population growth. Public sector data from India were used to develop a standardized database on traffic injuries and indicator of economic development. The data were analysed using linear regression models to test the a priori hypothesis of a positive relationship between net domestic product (NDP), and injury and death rates from road crashes across states. The absolute burden of RTI in India has been consistently rising over the past three decades. The reported rates are lower than those estimated by global health agencies and may reflect under-reporting. Population-based rates provide a better assessment of the public health burden of RTI than vehicle-based rates. There is an inverted U-shaped relationship between NDP and injury and death rates. Even with the limited data, Kuznets phenomenon is evident for within-country level comparisons. India and other developing countries could learn from the experience of highly motorized nations to avoid the expected rise in RTI and deaths with economic development, by currently investing in road safety and prevention measures.

  13. Topology optimized microbioreactors

    DEFF Research Database (Denmark)

    Schäpper, Daniel; Lencastre Fernandes, Rita; Eliasson Lantz, Anna

    2011-01-01

    This article presents the fusion of two hitherto unrelated fields—microbioreactors and topology optimization. The basis for this study is a rectangular microbioreactor with homogeneously distributed immobilized brewers yeast cells (Saccharomyces cerevisiae) that produce a recombinant protein...

  14. Real topological string amplitudes

    Energy Technology Data Exchange (ETDEWEB)

    Narain, K.S. [The Abdus Salam International Centre for Theoretical Physics (ICTP),Strada Costiera 11, Trieste, 34151 (Italy); Piazzalunga, N. [Simons Center for Geometry and Physics, State University of New York,Stony Brook, NY, 11794-3636 (United States); International School for Advanced Studies (SISSA) and INFN, Sez. di Trieste,via Bonomea 265, Trieste, 34136 (Italy); Tanzini, A. [International School for Advanced Studies (SISSA) and INFN, Sez. di Trieste,via Bonomea 265, Trieste, 34136 (Italy)

    2017-03-15

    We discuss the physical superstring correlation functions in type I theory (or equivalently type II with orientifold) that compute real topological string amplitudes. We consider the correlator corresponding to holomorphic derivative of the real topological amplitude G{sub χ}, at fixed worldsheet Euler characteristic χ. This corresponds in the low-energy effective action to N=2 Weyl multiplet, appropriately reduced to the orientifold invariant part, and raised to the power g{sup ′}=−χ+1. We show that the physical string correlator gives precisely the holomorphic derivative of topological amplitude. Finally, we apply this method to the standard closed oriented case as well, and prove a similar statement for the topological amplitude F{sub g}.

  15. Topological Susceptibility from Slabs

    CERN Document Server

    Bietenholz, Wolfgang; Gerber, Urs

    2015-01-01

    In quantum field theories with topological sectors, a non-perturbative quantity of interest is the topological susceptibility chi_t. In principle it seems straightforward to measure chi_t by means of Monte Carlo simulations. However, for local update algorithms and fine lattice spacings, this tends to be difficult, since the Monte Carlo history rarely changes the topological sector. Here we test a method to measure chi_t even if data from only one sector are available. It is based on the topological charges in sub-volumes, which we denote as slabs. Assuming a Gaussian distribution of these charges, this method enables the evaluation of chi_t, as we demonstrate with numerical results for non-linear sigma-models.

  16. Topological susceptibility from slabs

    Energy Technology Data Exchange (ETDEWEB)

    Bietenholz, Wolfgang [Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, Distrito Federal, C.P. 04510 (Mexico); Forcrand, Philippe de [Institute for Theoretical Physics, ETH Zürich,CH-8093 Zürich (Switzerland); CERN, Physics Department, TH Unit, CH-1211 Geneva 23 (Switzerland); Gerber, Urs [Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, Distrito Federal, C.P. 04510 (Mexico); Instituto de Física y Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo,Edificio C-3, Apdo. Postal 2-82, Morelia, Michoacán, C.P. 58040 (Mexico)

    2015-12-14

    In quantum field theories with topological sectors, a non-perturbative quantity of interest is the topological susceptibility χ{sub t}. In principle it seems straightforward to measure χ{sub t} by means of Monte Carlo simulations. However, for local update algorithms and fine lattice spacings, this tends to be difficult, since the Monte Carlo history rarely changes the topological sector. Here we test a method to measure χ{sub t} even if data from only one sector are available. It is based on the topological charges in sub-volumes, which we denote as slabs. Assuming a Gaussian distribution of these charges, this method enables the evaluation of χ{sub t}, as we demonstrate with numerical results for non-linear σ-models.

  17. Contact and symplectic topology

    CERN Document Server

    Colin, Vincent; Stipsicz, András

    2014-01-01

    Symplectic and contact geometry naturally emerged from the mathematical description of classical physics. The discovery of new rigidity phenomena and properties satisfied by these geometric structures launched a new research field worldwide. The intense activity of many European research groups in this field is reflected by the ESF Research Networking Programme "Contact And Symplectic Topology" (CAST). The lectures of the Summer School in Nantes (June 2011) and of the CAST Summer School in Budapest (July 2012) provide a nice panorama of many aspects of the present status of contact and symplectic topology. The notes of the minicourses offer a gentle introduction to topics which have developed in an amazing speed in the recent past. These topics include 3-dimensional and higher dimensional contact topology, Fukaya categories, asymptotically holomorphic methods in contact topology, bordered Floer homology, embedded contact homology, and flexibility results for Stein manifolds.

  18. Topology for analysis

    CERN Document Server

    Wilansky, Albert

    2008-01-01

    Three levels of examples and problems make this volume appropriate for students and professionals. Abundant exercises, ordered and numbered by degree of difficulty, illustrate important topological concepts. 1970 edition.

  19. Interior operators and topological connectedness | Castellini ...

    African Journals Online (AJOL)

    A categorical notion of interior operator is used in topology to define connectedness and disconnectedness with respect to an interior operator. A commutative diagram of Galois connections is used to show a relationship between these notions and Arhangelskii and Wiegandt's notions of connectedness and ...

  20. Generated topology on infinite sets by ultrafilters

    Directory of Open Access Journals (Sweden)

    Alireza Bagheri Salec

    2017-10-01

    Full Text Available Let $X$ be an infinite set, equipped with a topology $tau$. In this paper we studied the relationship between $tau$, and ultrafilters on $X$. We can discovered, among other thing, some relations of the Robinson's compactness theorem, continuity and the separation axioms. It is important also, aspects of communication between mathematical concepts.

  1. Topological systems versus attachment relations | Guido ...

    African Journals Online (AJOL)

    The manuscript makes a category-theoretic comparison between the concepts of topological system of S. Vickers and attachment relation of C. Guido. With the help of the recent definition of the notions in the framework of an arbitrary variety of algebras, we consider functorial relationships between the categories of such ...

  2. Data exploration of social client relationship management (CRM 2.0) adoption in the Nigerian construction business.

    Science.gov (United States)

    Ojelabi, Rapheal A; Afolabi, Adedeji O; Oyeyipo, Opeyemi O; Tunji-Olayeni, Patience F; Adewale, Bukola A

    2018-06-01

    Integrating social client relationship management (CRM 2.0) in the built environment can enhance the relationship between construction organizations and client towards sustaining a long and lasting collaboration. The data exploration analyzed the e-readiness of contracting and consulting construction firms in the uptake of CRM 2.0 and the barriers encountered in the adoption of the modern business tool. The targeted organizations consist of seventy five (75) construction businesses operating in Lagos State which were selected from a pool of registered contracting and consulting construction firms using random sampling technique. Descriptive statistics of the e-readiness of contracting and consulting construction firms for CRM 2.0 adoption and barriers limiting its uptake were analyzed. Also, inferential analysis using Mann-Whitney U statistical and independent sample t-test was performed on the dataset obtained. The data generated will support construction firms on the necessity to engage in client social relationship management in ensuring sustainable client relationship management in the built environment.

  3. Exploring the Relationship of Task Performance and Physical and Cognitive Fatigue During a Daylong Light Precision Task.

    Science.gov (United States)

    Yung, Marcus; Manji, Rahim; Wells, Richard P

    2017-11-01

    Our aim was to explore the relationship between fatigue and operation system performance during a simulated light precision task over an 8-hr period using a battery of physical (central and peripheral) and cognitive measures. Fatigue may play an important role in the relationship between poor ergonomics and deficits in quality and productivity. However, well-controlled laboratory studies in this area have several limitations, including the lack of work relevance of fatigue exposures and lack of both physical and cognitive measures. There remains a need to understand the relationship between physical and cognitive fatigue and task performance at exposure levels relevant to realistic production or light precision work. Errors and fatigue measures were tracked over the course of a micropipetting task. Fatigue responses from 10 measures and errors in pipetting technique, precision, and targeting were submitted to principal component analysis to descriptively analyze features and patterns. Fatigue responses and error rates contributed to three principal components (PCs), accounting for 50.9% of total variance. Fatigue responses grouped within the three PCs reflected central and peripheral upper extremity fatigue, postural sway, and changes in oculomotor behavior. In an 8-hr light precision task, error rates shared similar patterns to both physical and cognitive fatigue responses, and/or increases in arousal level. The findings provide insight toward the relationship between fatigue and operation system performance (e.g., errors). This study contributes to a body of literature documenting task errors and fatigue, reflecting physical (both central and peripheral) and cognitive processes.

  4. Fall Foliage Topology Seminars

    CERN Document Server

    1990-01-01

    This book demonstrates the lively interaction between algebraic topology, very low dimensional topology and combinatorial group theory. Many of the ideas presented are still in their infancy, and it is hoped that the work here will spur others to new and exciting developments. Among the many techniques disussed are the use of obstruction groups to distinguish certain exact sequences and several graph theoretic techniques with applications to the theory of groups.

  5. Open innovation in SMEs: Exploring inter-organizational relationships in an ecosystem

    DEFF Research Database (Denmark)

    Radziwon, Agnieszka; Bogers, Marcel

    2018-01-01

    Small- and medium-sized enterprises (SMEs) face the inherent tension of depending on external partners to complement their internal innovation activities while having limited resources to manage such open innovation processes. Given the importance of collaborative efforts between multiple...... stakeholders, we address the open innovation challenges from the SME perspective at the business-ecosystem level. We present an inductive case study of a particular regional ecosystem and focus on the inter-organizational collaboration between SMEs and other stakeholders in the ecosystem. With this focus, we...... explore how SMEs perceive, organize, and manage open innovation through strong collaborative ties with other ecosystem members. We identify a particular set of challenges for the SMEs due to the misalignment between their business model and that of their ecosystem. Specific findings include the link...

  6. Over-connected? A qualitative exploration of the relationship between Australian youth and their mobile phones.

    Science.gov (United States)

    Walsh, Shari P; White, Katherine M; Young, Ross M

    2008-02-01

    In Australia, youth are the most prolific users of mobile phones, however, there is little research investigating this phenomenon. This paper reports a qualitative exploration of psychological factors relating to mobile phone use amongst Australian youth. 32 participants, aged between 16 and 24 years, took part in focus group discussions. Thematic data analysis focussed on identifying the psychological benefits arising from mobile phone use and whether mobile phone addiction was occurring amongst this group. Mobile phone use was believed to provide numerous benefits to users and is an intrinsic part of most young people's lives. It emerged that some young people are extremely attached to their mobile phone with symptoms of behavioural addiction revealed in participants' descriptions of their mobile phone use. The study provides a solid foundation for further work investigating addictive patterns of mobile phone use amongst youth.

  7. Exploring the relationship between facets of mindfulness and eating pathology in women.

    Science.gov (United States)

    Lavender, Jason M; Gratz, Kim L; Tull, Matthew T

    2011-01-01

    Although researchers have examined the efficacy of acceptance- and mindfulness-based interventions in the treatment of eating disorders, few studies have explored the association between trait mindfulness and eating pathology. Therefore, the purpose of the current investigation was to examine the unique associations between multiple facets of mindfulness (acting with awareness, nonreactivity, nonjudgment, describing, and observing) and eating pathology. Undergraduate women (N = 276) completed the Eating Attitudes Test-26, the Five Facet Mindfulness Questionnaire, and the 21-item version of the Depression Anxiety Stress Scales. A hierarchical regression analysis revealed that four mindfulness facets (awareness, nonreactivity, nonjudgment, and describing) were uniquely associated with eating pathology above and beyond anxiety and depression symptoms. Results are discussed with regard to the potential role of various facets of trait mindfulness in eating pathology as well as the possible utility of mindfulness-based treatments for eating disorders.

  8. Tunable Topological Phononic Crystals

    KAUST Repository

    Chen, Zeguo; Wu, Ying

    2016-01-01

    Topological insulators first observed in electronic systems have inspired many analogues in photonic and phononic crystals in which remarkable one-way propagation edge states are supported by topologically nontrivial band gaps. Such band gaps can be achieved by breaking the time-reversal symmetry to lift the degeneracy associated with Dirac cones at the corners of the Brillouin zone. Here, we report on our construction of a phononic crystal exhibiting a Dirac-like cone in the Brillouin zone center. We demonstrate that simultaneously breaking the time-reversal symmetry and altering the geometric size of the unit cell result in a topological transition that we verify by the Chern number calculation and edge-mode analysis. We develop a complete model based on the tight binding to uncover the physical mechanisms of the topological transition. Both the model and numerical simulations show that the topology of the band gap is tunable by varying both the velocity field and the geometric size; such tunability may dramatically enrich the design and use of acoustic topological insulators.

  9. Tunable Topological Phononic Crystals

    KAUST Repository

    Chen, Zeguo

    2016-05-27

    Topological insulators first observed in electronic systems have inspired many analogues in photonic and phononic crystals in which remarkable one-way propagation edge states are supported by topologically nontrivial band gaps. Such band gaps can be achieved by breaking the time-reversal symmetry to lift the degeneracy associated with Dirac cones at the corners of the Brillouin zone. Here, we report on our construction of a phononic crystal exhibiting a Dirac-like cone in the Brillouin zone center. We demonstrate that simultaneously breaking the time-reversal symmetry and altering the geometric size of the unit cell result in a topological transition that we verify by the Chern number calculation and edge-mode analysis. We develop a complete model based on the tight binding to uncover the physical mechanisms of the topological transition. Both the model and numerical simulations show that the topology of the band gap is tunable by varying both the velocity field and the geometric size; such tunability may dramatically enrich the design and use of acoustic topological insulators.

  10. Exploring the relationship between perceived barriers to healthy eating and dietary behaviours in European adults.

    Science.gov (United States)

    Pinho, M G M; Mackenbach, J D; Charreire, H; Oppert, J-M; Bárdos, H; Glonti, K; Rutter, H; Compernolle, S; De Bourdeaudhuij, I; Beulens, J W J; Brug, J; Lakerveld, J

    2017-04-26

    Dietary behaviours may be influenced by perceptions of barriers to healthy eating. Using data from a large cross-European study (N = 5900), we explored associations between various perceived barriers to healthy eating and dietary behaviours among adults from urban regions in five European countries and examined whether associations differed across regions and socio-demographic backgrounds. Frequency of consumption of fruit, vegetables, fish, fast food, sugar-sweetened beverages, sweets, breakfast and home-cooked meals were split by the median into higher and lower consumption. We tested associations between barriers (irregular working hours; giving up preferred foods; busy lifestyle; lack of willpower; price of healthy food; taste preferences of family and friends; lack of healthy options and unappealing foods) and dietary variables using multilevel logistic regression models. We explored whether associations differed by age, sex, education, urban region, weight status, household composition or employment. Respondents who perceived any barrier were less likely to report higher consumption of healthier foods and more likely to report higher consumption of fast food. 'Lack of willpower', 'time constraints' and 'taste preferences' were most consistently associated with consumption. For example, those perceiving lack of willpower ate less fruit [odds ratio (OR) 0.57; 95% confidence interval (CI) 0.50-0.64], and those with a busy lifestyle ate less vegetables (OR 0.54; 95% CI 0.47-0.62). Many associations differed in size, but not in direction, by region, sex, age and household composition. Perceived 'lack of willpower', 'time constraints' and 'taste preferences' were barriers most strongly related to dietary behaviours, but the association between various barriers and lower intake of fruit and vegetables was somewhat more pronounced among younger participants and women.

  11. Exploring the relationship between service quality and customer satisfaction in postal financial service

    Directory of Open Access Journals (Sweden)

    Steven K Msosa

    2015-09-01

    Full Text Available Service quality and customer satisfaction are related and are important factors for the success of service providers be it in the public or the private sector. This study aims to examine the relationship between service quality and customer satisfaction in the Malawian public postal service, specifically its banking division. A cross-sectional, quantitative and descriptive study was undertaken and data was collected from 400 customers using the SERVPERF model. A non-probability sampling approach was adopted and respondents were selected using convenience sampling. Reliability of the study was tested using Cronbach alpha. Correlation tests were conducted using Spearman’s rho. The results show that all the five service quality dimensions, viz. tangibles, reliability, empathy, assurance and responsiveness, are significantly and positively correlated. There was also a significant correlation between the service quality dimensions and overall service quality, customer satisfaction and customer loyalty

  12. An exploration of the relationship between adsorption and bioavailability of pesticides in soil to earthworm

    Energy Technology Data Exchange (ETDEWEB)

    Yu Yunlong [Department of Plant Protection, Zhejiang University, Kaixuan Road 268, Hangzhou, Zhejiang 310029 (China)]. E-mail: ylyu@zju.edu.cn; Wu Xiaomao [Department of Plant Protection, College of Agriculture, Guizhou University, Guiyang 550025 (China); Li Shaonan [Department of Plant Protection, Zhejiang University, Kaixuan Road 268, Hangzhou, Zhejiang 310029 (China); Fang Hua [Department of Plant Protection, Zhejiang University, Kaixuan Road 268, Hangzhou, Zhejiang 310029 (China); Zhan Haiyan [Department of Plant Protection, Zhejiang University, Kaixuan Road 268, Hangzhou, Zhejiang 310029 (China); Yu Jingquan [Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029 (China)

    2006-06-15

    A study was conducted to determine the adsorption/desorption of butachlor, myclobutanil and chlorpyrifos on five soils using a batch equilibration technique and to study the relationship between bioavailability to Allolobophora caliginosa and the adsorption/desorption of these three pesticides. The results showed that the adsorption/desorption processes of the tested compounds were mainly controlled by soil organic matter content (OM) and octanol/water-partitioning coefficient (K {sub ow}), and that the bioavailability of the pesticides was dependent on characteristics of pesticides, properties of soils, and uptake routes of earthworms. Bioconcentration of butachlor and myclobutanil was negatively correlated with Freundlich adsorption constant K {sub af} and K {sub df}. However, only a slightly positive correlation between bioconcentration and K {sub af} and K {sub df} was observed for chlorpyrifos due to its high affinity onto soil. - Bioavailability of pesticides in soil to earthworm is governed by adsorption characteristics.

  13. Exploring the relationships between free-time management and boredom in leisure.

    Science.gov (United States)

    Wang, Wei-Ching; Wu, Chung-Chi; Wu, Chang-Yang; Huan, Tzung-Cheng

    2012-04-01

    The purpose of the study was to examine the relations of five dimensions of free-time management (including goal setting and evaluating, technique, values, immediate response, and scheduling) with leisure boredom, and whether these factors could predict leisure boredom. A total of 500 undergraduates from a university in southern Taiwan were surveyed with 403 usable questionnaires was returned. Pearson correlation analysis revealed that five dimensions of free-time management had significant negative relationships with leisure boredom. Furthermore, the results of stepwise regression analysis revealed that four dimensions of free-time management were significant contributors to leisure boredom. Finally, we suggested students can avoid boredom by properly planning and organizing leisure time and applying techniques for managing leisure time.

  14. Synthesis and structure-activity relationship exploration of some potent anti-cancer phenyl amidrazone derivatives.

    Science.gov (United States)

    Habashneh, Almeqdad Y; El-Abadelah, Mustafa M; Bardaweel, Sanaa K; Taha, Mutasem O

    2017-12-04

    Amidrazones have been reported to have significant anti-tumor properties against several cancer cell lines. The current project aims to profile the structure-anticancer activity relationship of phenyl-amidrazons. Fifteen phenyl-amidrazone-piperazine derivatives were prepared and tested against four cancer cell lines (leukemia, prostate, breast and colon cancers). Six compounds illustrated low micromolar anticancer IC50 values, while the remaining compounds were either inactive or of moderate potencies. All compounds were virtually nontoxic against normal fibroblast cells. Docking into the oncogenic kinase bcr/abl illustrated the critical importance of (i) p-halogen substituent on the ligand's phenyl ring and (ii) the presence of positive ionizable moiety at the ligand's piperazine fragment for anticancer activity. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.

  15. An exploration study to detect important factors influencing customer relationship management on reducing unhappy clients

    Directory of Open Access Journals (Sweden)

    Zeynab Davand

    2013-12-01

    Full Text Available This paper presents an investigation to find out important factors influencing electronic customer relationship management on reducing customer complaints. The proposed study designs a questionnaire in Likert scale consists of 19 questions, distributes it among some Iranian experts in banking industry and analyzes it based on principal component analysis. During the survey, the number questions are reduced to 16 because of skewness of three questions. Cronbach alpha is calculated as 0.82 and Kaiser-Meyer-Olkin Measure of Sampling Adequacy and Approx. Chi-Square are 0.746 and 1993, respectively. Based on the results of our survey, we have derived four factors including knowledge management, customer retention, customer oriented strategy and structure oriented.

  16. An exploration of the relationship between adsorption and bioavailability of pesticides in soil to earthworm

    International Nuclear Information System (INIS)

    Yu Yunlong; Wu Xiaomao; Li Shaonan; Fang Hua; Zhan Haiyan; Yu Jingquan

    2006-01-01

    A study was conducted to determine the adsorption/desorption of butachlor, myclobutanil and chlorpyrifos on five soils using a batch equilibration technique and to study the relationship between bioavailability to Allolobophora caliginosa and the adsorption/desorption of these three pesticides. The results showed that the adsorption/desorption processes of the tested compounds were mainly controlled by soil organic matter content (OM) and octanol/water-partitioning coefficient (K ow ), and that the bioavailability of the pesticides was dependent on characteristics of pesticides, properties of soils, and uptake routes of earthworms. Bioconcentration of butachlor and myclobutanil was negatively correlated with Freundlich adsorption constant K af and K df . However, only a slightly positive correlation between bioconcentration and K af and K df was observed for chlorpyrifos due to its high affinity onto soil. - Bioavailability of pesticides in soil to earthworm is governed by adsorption characteristics

  17. Exploring the Relationship Between Working Memory, Compressor Speed, and Background Noise Characteristics

    DEFF Research Database (Denmark)

    Ohlenforst, Barbara; Souza, Pamela E.; MacDonald, Ewen

    2016-01-01

    grouped by high or low working memory according to their performance on a reading span test. Speech intelligibility was measured for low-context sentences presented in background noise, where the noise varied in the extent of amplitude modulation. Simulated fast- or slowacting compression amplification...... on the number of talkers in the background noise. The presented signal to noise ratios were not a significant factor on the measured intelligibility performance. Conclusion: In agreement with earlier research, high working memory allowed better speech intelligibility when fast compression was applied......Objectives: Previous work has shown that individuals with lower working memory demonstrate reduced intelligibility for speech processed with fast-acting compression amplification. This relationship has been noted in fluctuating noise, but the extent of noise modulation that must be present...

  18. Exploring relationships between patient safety culture and patients' assessments of hospital care.

    Science.gov (United States)

    Sorra, Joann; Khanna, Kabir; Dyer, Naomi; Mardon, Russ; Famolaro, Theresa

    2014-10-01

    The purpose of this study was to examine relationships among 2 Agency for Healthcare Research and Quality measures of hospital patient safety and quality, which reflect different perspectives on hospital performance: the Hospital Survey on Patient Safety Culture (Hospital SOPS)--a hospital employee patient safety culture survey--and the Consumer Assessment of Healthcare Providers and Systems Hospital Survey (CAHPS Hospital Survey)--a survey of the experiences of adult inpatients with hospital care and services. Our hypothesis was that these 2 measures would be positively related. We performed multiple regressions to examine the relationships between the Hospital SOPS measures and CAHPS Hospital Survey measures, controlling for hospital bed size and ownership. Analyses were conducted at the hospital level with each survey's measures using data from 73 hospitals that administered both surveys during similar periods. Higher overall Hospital SOPS composite average scores were associated with higher overall CAHPS Hospital Survey composite average scores (r = 0.41, P G 0.01). Twelve of 15 Hospital SOPS measures were positively related to the CAHPS Hospital Survey composite average score after controlling for bed size and ownership, with significant standardized regression coefficients ranging from 0.25 to 0.38. None of the Hospital SOPS measures were significantly correlated with either of the two single-item CAHPS Hospital Survey measures (hospital rating and willingness to recommend). This study found that hospitals where staff have more positive perceptions of patient safety culture tend to have more positive assessments of care from patients. This finding helps validate both surveys and suggests that improvements in patient safety culture may lead to improved patient experience with care. Further research is needed to determine the generalizability of these results to larger sets of hospitals, to hospital units, and to other settings of care.

  19. Topological Reorganization of the Default Mode Network in Severe Male Obstructive Sleep Apnea

    Directory of Open Access Journals (Sweden)

    Liting Chen

    2018-06-01

    Full Text Available Impaired spontaneous regional activity and altered topology of the brain network have been observed in obstructive sleep apnea (OSA. However, the mechanisms of disrupted functional connectivity (FC and topological reorganization of the default mode network (DMN in patients with OSA remain largely unknown. We explored whether the FC is altered within the DMN and examined topological changes occur in the DMN in patients with OSA using a graph theory analysis of resting-state functional magnetic resonance imaging data and evaluated the relationship between neuroimaging measures and clinical variables. Resting-state data were obtained from 46 male patients with untreated severe OSA and 46 male good sleepers (GSs. We specifically selected 20 DMN subregions to construct the DMN architecture. The disrupted FC and topological properties of the DMN in patients with OSA were characterized using graph theory. The OSA group showed significantly decreased FC of the anterior–posterior DMN and within the posterior DMN, and also showed increased FC within the DMN. The DMN exhibited small-world topology in both OSA and GS groups. Compared to GSs, patients with OSA showed a decreased clustering coefficient (Cp and local efficiency, and decreased nodal centralities in the left posterior cingulate cortex and dorsal medial prefrontal cortex, and increased nodal centralities in the ventral medial prefrontal cortex and the right parahippocampal cortex. Finally, the abnormal DMN FC was significantly related to Cp, path length, global efficiency, and Montreal cognitive assessment score. OSA showed disrupted FC within the DMN, which may have contributed to the observed topological reorganization. These findings may provide further evidence of cognitive deficits in patients with OSA.

  20. Factorising the 3D topologically twisted index

    Science.gov (United States)

    Cabo-Bizet, Alejandro

    2017-04-01

    We explore the path integration — upon the contour of hermitian (non-auxliary) field configurations — of topologically twisted N=2 Chern-Simons-matter theory (TTCSM) on {S}_2 times a segment. In this way, we obtain the formula for the 3D topologically twisted index, first as a convolution of TTCSM on {S}_2 times halves of {S}_1 , second as TTCSM on {S}_2 times {S}_1 — with a puncture, — and third as TTCSM on {S}_2× {S}_1 . In contradistinction to the first two cases, in the third case, the vector multiplet auxiliary field D is constrained to be anti-hermitian.

  1. Protein structure: geometry, topology and classification

    Energy Technology Data Exchange (ETDEWEB)

    Taylor, William R.; May, Alex C.W.; Brown, Nigel P.; Aszodi, Andras [Division of Mathematical Biology, National Institute for Medical Research, London (United Kingdom)

    2001-04-01

    The structural principals of proteins are reviewed and analysed from a geometric perspective with a view to revealing the underlying regularities in their construction. Computer methods for the automatic comparison and classification of these structures are then reviewed with an analysis of the statistical significance of comparing different shapes. Following an analysis of the current state of the classification of proteins, more abstract geometric and topological representations are explored, including the occurrence of knotted topologies. The review concludes with a consideration of the origin of higher-level symmetries in protein structure. (author)

  2. Thermomechanical properties of polymer nanocomposites: Exploring a unified relationship with planar polymer films

    Science.gov (United States)

    Bansal, Amitabh

    The thermal and mechanical response of polymers, which provide limitations to their practical use, are greatly improved by the addition of a small fraction of an inorganic nanofiller. However, the resulting changes in polymer properties are poorly understood, primarily due to the non-uniform spatial distribution of nanoparticles. This research explores the properties of polystyrene filed with silica nanoparticles and illustrates for the first time that the thermodynamic properties of "polymer nanocomposites" are quantitatively equivalent to the well-understood case of planar polymer films with a uniform thickness. These ideas are quantified by drawing a direct analogy between thin film thickness and an appropriate average ligament thickness measured using electron microscopy. The change in polymer glass transition temperatures with decreasing ligament thickness were found to be quantitatively equivalent to the corresponding thin film data. In combination with viscoelastic properties of the nanocomposites that are in quantitative agreement with data from thin films, these conclusions provide a facile means of understanding and predicting the thermomechanical properties and, potentially, the engineering properties of practically relevant polymer nanocomposites. Grafting of high molecular weight polystyrene onto the silica nanoparticles greatly improves the dispersion quality of nanofillers and also provides a means to tailor the thermo-mechanical properties in nanocomposites. It is concluded that the grafted polystyrene is akin to polymer brushes on flat surfaces. The mobility and stiffness of these grafted chains are expected to be low as compared to the free polymer. In this context a mechanism for the increase in glass transition is proposed: (1) the stiff grafted chains will tend to decrease mobility and thus increase glass transition, (2) the extent of interdigitation of the grafted polystyrene into the matrix will determine the extent to which the nanocomposite

  3. Brussels without Muscles? Exploring the EU's Management of its Gas Relationship with Russia.

    Energy Technology Data Exchange (ETDEWEB)

    Harriman, David

    2010-03-15

    In many respects, the EU is a strong player on the world stage, for example, in trade, climate change issues and crisis management. In its relationship with Russia over gas supply, however, the EU's political capacity remains limited. Part of the problem lies in the lack of EU unity, but this is more a symptom than an actual cause. A key explanation is the interplay between external and internal factors. The external factors - that is the EU's and Russia's conflicting interests and the structure of the political system - reinforce the EU's internal problems. This is an effect of that the gas issue falls under different policy areas (energy, foreign relations and security policy) within which the European Commission and the member states have different responsibilities. Another problem is that energy is the Commission's responsibility, but the real competence lies with the member states. The current multipolar structure of European politics reduces the scope for cooperation that favours the EU as a whole - in this case its energy security. The fact that the Commission and member states, and the member states among themselves, have different views on energy policy vis-a-vis Russia exacerbates these circumstances. Other key factors are the lack of transparency and competition in the gas sector (which suits both the Russian company Gazprom and large EU companies) and the unbalanced dependence of EU countries on Russian gas. Relations between France, Germany and Russia are also important. Germany and France are key players for the EU's energy security, and their support for the gas pipeline Nord Stream, their resistance to unbundling in the gas sector and their relatively warm relations with Russia have not strengthened the EU's position in its gas relationship with Russia. Besides, the Lisbon Treaty increases France's and Germany's powers inside the EU. Combined with the conflicting interests of the EU nd Russia, the

  4. Brussels without Muscles? Exploring the EU's Management of its Gas Relationship with Russia

    International Nuclear Information System (INIS)

    Harriman, David

    2010-03-01

    In many respects, the EU is a strong player on the world stage, for example, in trade, climate change issues and crisis management. In its relationship with Russia over gas supply, however, the EU's political capacity remains limited. Part of the problem lies in the lack of EU unity, but this is more a symptom than an actual cause. A key explanation is the interplay between external and internal factors. The external factors - that is the EU's and Russia's conflicting interests and the structure of the political system - reinforce the EU's internal problems. This is an effect of that the gas issue falls under different policy areas (energy, foreign relations and security policy) within which the European Commission and the member states have different responsibilities. Another problem is that energy is the Commission's responsibility, but the real competence lies with the member states. The current multipolar structure of European politics reduces the scope for cooperation that favours the EU as a whole - in this case its energy security. The fact that the Commission and member states, and the member states among themselves, have different views on energy policy vis-a-vis Russia exacerbates these circumstances. Other key factors are the lack of transparency and competition in the gas sector (which suits both the Russian company Gazprom and large EU companies) and the unbalanced dependence of EU countries on Russian gas. Relations between France, Germany and Russia are also important. Germany and France are key players for the EU's energy security, and their support for the gas pipeline Nord Stream, their resistance to unbundling in the gas sector and their relatively warm relations with Russia have not strengthened the EU's position in its gas relationship with Russia. Besides, the Lisbon Treaty increases France's and Germany's powers inside the EU. Combined with the conflicting interests of the EU nd Russia, the structure of European politics, and different views

  5. Exploring the relationship between meteorology and surface PM2.5 in Northern India

    Science.gov (United States)

    Schnell, J.; Naik, V.; Horowitz, L. W.; Paulot, F.; Ginoux, P. A.

    2017-12-01

    Northern India is one of the most polluted and densely populated regions in world. Accurately modeling pollution in the region is difficult due to the extreme conditions with respect to emissions, meteorology, and topography, but it is paramount in order to understand how future changes in emissions and climate may alter the region's pollution regime. We evaluate a developmental version of the new-generation NOAA GFDL Atmospheric Model, version 4 (AM4) in its ability to simulate observed wintertime PM2.5 and its relationship to meteorology over the Northern India (23°N-31°N, 68°E-90°E). We perform two simulations of the GFDL-AM4 nudged to observed meteorology for the period (1980-2016) with two emission inventories developed for CMIP5 and CMIP6 and compare results with observations from India's Central Pollution Control Board (CPCB) for the period 1 October 2015 - 31 March 2016. Overall, our results indicate that the simulation with CMIP6 emissions has substantially reduced the low model bias in the region. The AM4, albeit biased low, generally simulates the magnitude and daily variability in observed total PM2.5. Ammonium nitrate and ammonium sulfate are the primary components of PM2.5 in the model, and although not directly observed, correlations of total observed PM2.5 and meteorology with the modeled individual PM2.5 components suggest the same for the observations. The model correctly reproduces the shape and magnitude of the seasonal cycle of PM2.5; but for the diurnal cycle, it misses the early evening rise and secondary maximum found in the observations. Observed PM2.5 abundances within the densely populated Indo-Gangetic Plain are by far the highest and are closely related to boundary layer meteorology, specifically relative humidity, wind speed, boundary layer height, and inversion strength. The GFDL-AM4 reproduces the observed pollution gradient over Northern India as well as the strength of the meteorology-PM2.5 relationship in most locations.

  6. Inter-organizational design: exploring the relationship between formal architecture and ICT investments

    Science.gov (United States)

    Iubatti, Daniela; Masciarelli, Francesca; Simboli, Alberto

    This chapter aims to explore how the information-processing capabilities that emerge from a network structure affect the diffusion of innovation in a multidivisional organization. In particular, this study analyzes the role of firm investments in ICT to facilitate communication and knowledge diffusion. Using a qualitative approach, we investigate the behavior of an Italian multinational firm, Engineering S.p.A., analyzing our data using a content analysis procedure. Our results show the limited role of ICT in favoring knowledge exchange both inside and outside the firm's divisions: traditional communication patterns are generally preferred over the use of technologies for information sharing. Additionally, we find that key individuals who play a central role in the firm's communication network are unable to use ICTs for knowledge transfer. We conclude that this is the result of a strategic decision to keep top management practically unchanged since the firm was established. Therefore, key individuals act as filters to knowledge flows. Knowledge, in particular tacit knowledge, is transferred from key individuals to other actors through face-to-face contacts, thereby creating a diseconomy for the organization.

  7. MODexplorer: an integrated tool for exploring protein sequence, structure and function relationships.

    KAUST Repository

    Kosinski, Jan

    2013-02-08

    SUMMARY: MODexplorer is an integrated tool aimed at exploring the sequence, structural and functional diversity in protein families useful in homology modeling and in analyzing protein families in general. It takes as input either the sequence or the structure of a protein and provides alignments with its homologs along with a variety of structural and functional annotations through an interactive interface. The annotations include sequence conservation, similarity scores, ligand-, DNA- and RNA-binding sites, secondary structure, disorder, crystallographic structure resolution and quality scores of models implied by the alignments to the homologs of known structure. MODexplorer can be used to analyze sequence and structural conservation among the structures of similar proteins, to find structures of homologs solved in different conformational state or with different ligands and to transfer functional annotations. Furthermore, if the structure of the query is not known, MODexplorer can be used to select the modeling templates taking all this information into account and to build a comparative model. AVAILABILITY AND IMPLEMENTATION: Freely available on the web at http://modorama.biocomputing.it/modexplorer. Website implemented in HTML and JavaScript with all major browsers supported. SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online.

  8. MODexplorer: an integrated tool for exploring protein sequence, structure and function relationships.

    KAUST Repository

    Kosinski, Jan; Barbato, Alessandro; Tramontano, Anna

    2013-01-01

    SUMMARY: MODexplorer is an integrated tool aimed at exploring the sequence, structural and functional diversity in protein families useful in homology modeling and in analyzing protein families in general. It takes as input either the sequence or the structure of a protein and provides alignments with its homologs along with a variety of structural and functional annotations through an interactive interface. The annotations include sequence conservation, similarity scores, ligand-, DNA- and RNA-binding sites, secondary structure, disorder, crystallographic structure resolution and quality scores of models implied by the alignments to the homologs of known structure. MODexplorer can be used to analyze sequence and structural conservation among the structures of similar proteins, to find structures of homologs solved in different conformational state or with different ligands and to transfer functional annotations. Furthermore, if the structure of the query is not known, MODexplorer can be used to select the modeling templates taking all this information into account and to build a comparative model. AVAILABILITY AND IMPLEMENTATION: Freely available on the web at http://modorama.biocomputing.it/modexplorer. Website implemented in HTML and JavaScript with all major browsers supported. SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online.

  9. Exploring relationships for visceral and somatic pain with autonomic control and personality.

    Science.gov (United States)

    Paine, Peter; Kishor, Jessin; Worthen, Sian F; Gregory, Lloyd J; Aziz, Qasim

    2009-08-01

    The autonomic nervous system (ANS) integrates afferent and motor activity for homeostatic processes including pain. The aim of the study was to compare hitherto poorly characterised relations between brainstem autonomic control and personality in response to visceral and somatic pain. Eighteen healthy subjects (16 females, mean age 34) had recordings during rest and pain of heart rate (HR), cardiac vagal tone (CVT), cardiac sensitivity to baroreflex (CSB), skin conductance level (SC), cardiac sympathetic index (CSI) and mean blood pressure (MBP). Visceral pain was induced by balloon distension in proximal (PB) and distal (DB) oesophagus and somatic pain by nail-bed pressure (NBP). Eight painful stimuli were delivered at each site and unpleasantness and intensity measured. Personality was profiled with the Big Five inventory. (1) Oesophageal intubation evoked "fight-flight" responses: HR and sympathetic (CSI, SC, MBP) elevation with parasympathetic (CVT) withdrawal (pintrovert subjects had greater positive pain-related CVT slope change (neuroticism r 0.8, p<0.05; extroversion r -0.5, p<0.05). Pain-evoked heart rate increases were mediated by parasympathetic and sympathetic co-activation - a novel finding in humans but recently described in mammals too. Visceral pain-related parasympathetic change correlated with personality. ANS defence responses are nuanced and may relate to personality type for visceral pain. Clinical relevance of these findings warrants further exploration.

  10. Exploring the relationship between accreditation and patient satisfaction - the case of selected Lebanese hospitals.

    Science.gov (United States)

    Haj-Ali, Wissam; Bou Karroum, Lama; Natafgi, Nabil; Kassak, Kassem

    2014-11-01

    Patient satisfaction is one of the vital attributes to consider when evaluating the impact of accreditation systems. This study aimed to explore the impact of the national accreditation system in Lebanon on patient satisfaction. An explanatory cross-sectional study of six hospitals in Lebanon. Patient satisfaction was measured using the SERVQUAL tool assessing five dimensions of quality (reliability, assurance, tangibility, empathy, and responsiveness). Independent variables included hospital accreditation scores, size, location (rural/urban), and patient demographics. The majority of patients (76.34%) were unsatisfied with the quality of services. There was no statistically significant association between accreditation classification and patient satisfaction. However, the tangibility dimension - reflecting hospital structural aspects such as physical facility and equipment was found to be associated with patient satisfaction. This study brings to light the importance of embracing more adequate patient satisfaction measures in the Lebanese hospital accreditation standards. Furthermore, the findings reinforce the importance of weighing the patient perspective in the development and implementation of accreditation systems. As accreditation is not the only driver of patient satisfaction, hospitals are encouraged to adopt complementary means of promoting patient satisfaction.

  11. Exploring the relationship between accreditation and patient satisfaction – the case of selected Lebanese hospitals

    Science.gov (United States)

    Haj-Ali, Wissam; Bou Karroum, Lama; Natafgi, Nabil; Kassak, Kassem

    2014-01-01

    Background: Patient satisfaction is one of the vital attributes to consider when evaluating the impact of accreditation systems. This study aimed to explore the impact of the national accreditation system in Lebanon on patient satisfaction. Methods: An explanatory cross-sectional study of six hospitals in Lebanon. Patient satisfaction was measured using the SERVQUAL tool assessing five dimensions of quality (reliability, assurance, tangibility, empathy, and responsiveness). Independent variables included hospital accreditation scores, size, location (rural/urban), and patient demographics. Results: The majority of patients (76.34%) were unsatisfied with the quality of services. There was no statistically significant association between accreditation classification and patient satisfaction. However, the tangibility dimension – reflecting hospital structural aspects such as physical facility and equipment was found to be associated with patient satisfaction. Conclusion: This study brings to light the importance of embracing more adequate patient satisfaction measures in the Lebanese hospital accreditation standards. Furthermore, the findings reinforce the importance of weighing the patient perspective in the development and implementation of accreditation systems. As accreditation is not the only driver of patient satisfaction, hospitals are encouraged to adopt complementary means of promoting patient satisfaction. PMID:25396210

  12. Exploring the relationship between object realism and object-based attention effects.

    Science.gov (United States)

    Roque, Nelson; Boot, Walter R

    2015-09-01

    Visual attention prioritizes processing of locations in space, and evidence also suggests that the benefits of attention can be shaped by the presence of objects (object-based attention). However, the prevalence of object-based attention effects has been called into question recently by evidence from a large-sampled study employing classic attention paradigms (Pilz et al., 2012). We conducted two experiments to explore factors that might determine when and if object-based attention effects are observed, focusing on the degree to which the concreteness and realism of objects might contribute to these effects. We adapted the classic attention paradigm first reported by Egly, Driver, and Rafal (1994) by replacing abstract bar stimuli in some conditions with objects that were more concrete and familiar to participants: items of silverware. Furthermore, we varied the realism of these items of silverware, presenting either cartoon versions or photo-realistic versions. Contrary to predictions, increased realism did not increase the size of object-based effects. In fact, no clear object-based effects were observed in either experiment, consistent with previous failures to replicate these effects in similar paradigms. While object-based attention may exist, and may have important influences on how we parse the visual world, these and other findings suggest that the two-object paradigm typically relied upon to study object-based effects may not be the best paradigm to investigate these issues. Copyright © 2015 Elsevier B.V. All rights reserved.

  13. Twitter location (sometimes matters: Exploring the relationship between georeferenced tweet content and nearby feature classes

    Directory of Open Access Journals (Sweden)

    Stefan Hahmann

    2014-12-01

    Full Text Available In this paper, we investigate whether microblogging texts (tweets produced on mobile devices are related to the geographical locations where they were posted. For this purpose, we correlate tweet topics to areas. In doing so, classified points of interest from OpenStreetMap serve as validation points. We adopted the classification and geolocation of these points to correlate with tweet content by means of manual, supervised, and unsupervised machine learning approaches. Evaluation showed the manual classification approach to be highest quality, followed by the supervised method, and that the unsupervised classification was of low quality. We found that the degree to which tweet content is related to nearby points of interest depends upon topic (that is, upon the OpenStreetMap category. A more general synthesis with prior research leads to the conclusion that the strength of the relationship of tweets and their geographic origin also depends upon geographic scale (where smaller scale correlations are more significant than those of larger scale.

  14. Qualitatively Exploring the Relationship among Gratitude, Spirituality and Life Satisfaction in Turkish-Muslim Children

    Directory of Open Access Journals (Sweden)

    Gulusan Gocen

    2016-08-01

    Full Text Available The aim of this paper is to study what children are grateful for in daily life and to reveal the relationship among gratitude, spirituality, and life satisfaction. This study investigates gratitude by qualitatively analyzing children’s gratitude diaries. Convenience sampling has been used in the research. Children from lower and middle socio-economic levels studying in a school located in a developing neighborhood were chosen. The sample of the study consisted of 70 children between the ages of 11 and 12 years old (SD = .25. After the aim of the study was explained to the children, they were asked to voluntarily keep a gratitude diary. The participants recorded their daily experiences in written diaries at the end of each day for three weeks. The data was collected by the author in 2012. Content and frequency analyses were used. According to the results of the study, the most common themes in the children’s gratitude were having a family and being able to meet their basic needs. Their own happiness emerged third. Also, expressions and drawings that were in their diaries show that gratitude is linked with their spirituality and life satisfaction. According to this, as gratitude increased, spirituality increased, too.

  15. Exploring the Dimensions of Doctor-Patient Relationship in Clinical Practice in Hospital Settings

    Directory of Open Access Journals (Sweden)

    Saurabh RamBiharilal Shrivastava

    2014-05-01

    Full Text Available The Doctor-Patient Relationship (DPR is a complex concept in the medical sociology in which patients voluntarily approach a doctor and thus become a part of a contract in which they tends to abide with the doctor’s guidance. Globally, the DPR has changed drastically over the years owing to the commercialization and privatization of the health sector. Furthermore, the dynamics of the DPR has shown a significant change because of the formulation of consumer protection acts; clauses for professional misconduct and criminal negligence; establishment of patient forums and organizations; massive expansion of the mass media sector leading to increase in health awareness among people; and changes in the status of the doctors. Realizing the importance of DPR in the final outcome and quality of life of the patient, multiple measures have been suggested to make a correct diagnosis and enhance healing. To conclude, good DPR is the crucial determinant for a better clinical outcome and satisfaction with the patients, irrespective of the socio-cultural determinants.

  16. Sleep and inflammatory bowel disease: exploring the relationship between sleep disturbances and inflammation.

    Science.gov (United States)

    Kinnucan, Jami A; Rubin, David T; Ali, Tauseef

    2013-11-01

    Sleep disturbances are associated with a greater risk of serious adverse health events, economic consequences, and, most importantly, increased all-cause mortality. Several studies support the associations among sleep, immune function, and inflammation. The relationship between sleep disturbances and inflammatory conditions is complex and not completely understood. Sleep deprivation can lead to increased levels of inflammatory cytokines, including interleukin (IL)-1β IL-6, tumor necrosis factor-α and C-reactive protein, which can lead to further activation of the inflammatory cascade. The relevance of sleep in inflammatory bowel disease (IBD), a chronic immune-mediated inflammatory disease of the gastrointestinal tract, has recently received more attention. Several studies have shown that patients with both inactive and active IBD have self-reported sleep disturbances. Here, we present a concise review of sleep and its association with the immune system and the process of inflammation. We discuss the studies that have evaluated sleep in patients with IBD as well as possible treatment options for those patients with sleep disturbances. An algorithm for evaluating sleep disturbances in the IBD population is also proposed. Further research is still needed to better characterize sleep disturbances in the IBD population as well as to assess the effects of various therapeutic interventions to improve sleep quality. It is possible that the diagnosis and treatment of sleep disturbances in this population may provide an opportunity to alter disease outcomes.

  17. Exploring the relationships among humility, negative interaction in the church, and depressed affect.

    Science.gov (United States)

    Krause, Neal

    2014-01-01

    The purpose of this study is to test three hypotheses involving humility. The first hypothesis specifies that people who are more deeply involved in religion will be more humble than individuals who are not as involved in religion. The second hypothesis predicts that humility will offset the effects of negative interaction in the church on depressed affect scores. The third hypothesis specifies that there will be a positive relationship between age and humility. The data come from the Religion, Aging, and Health Survey, a nationwide survey of middle-aged and older Christians who attend church on a regular basis (N = 1154). The findings suggest that people who are more committed to their faith tend to be more humble. The results also reveal that negative interaction in the church is greater for people with lower humility scores than individuals with higher humility scores. In contrast, the data indicate that older adults are not more humble than middle-aged people. The findings are noteworthy because they identify a source of resilience that may help middle-aged and older adults cope more effectively with the effects of stress.

  18. Spatiotemporal distribution of Oklahoma earthquakes: Exploring relationships using a nearest-neighbor approach

    Science.gov (United States)

    Vasylkivska, Veronika S.; Huerta, Nicolas J.

    2017-07-01

    Determining the spatiotemporal characteristics of natural and induced seismic events holds the opportunity to gain new insights into why these events occur. Linking the seismicity characteristics with other geologic, geographic, natural, or anthropogenic factors could help to identify the causes and suggest mitigation strategies that reduce the risk associated with such events. The nearest-neighbor approach utilized in this work represents a practical first step toward identifying statistically correlated clusters of recorded earthquake events. Detailed study of the Oklahoma earthquake catalog's inherent errors, empirical model parameters, and model assumptions is presented. We found that the cluster analysis results are stable with respect to empirical parameters (e.g., fractal dimension) but were sensitive to epicenter location errors and seismicity rates. Most critically, we show that the patterns in the distribution of earthquake clusters in Oklahoma are primarily defined by spatial relationships between events. This observation is a stark contrast to California (also known for induced seismicity) where a comparable cluster distribution is defined by both spatial and temporal interactions between events. These results highlight the difficulty in understanding the mechanisms and behavior of induced seismicity but provide insights for future work.

  19. Exploring the relationship between physical health, depressive symptoms, and depression diagnoses in Hispanic dementia caregivers.

    Science.gov (United States)

    Cucciare, Michael A; Gray, Heather; Azar, Armin; Jimenez, Daniel; Gallagher-Thompson, Dolores

    2010-04-01

    The present study examined the relationship between self-reported physical health, depressive symptoms, and the occurrence of depression diagnosis in Hispanic female dementia caregivers. Participants were 89 Hispanic female dementia caregivers. This study used a cross-sectional design. Baseline depression and physical health data were collected from participants enrolled in the 'Reducing Stress in Hispanic Anglo Dementia Caregivers' study sponsored by the National Institute on Aging. Physical health was assessed using the Medical Outcome Study Short Form-36 (SF-36), a one-item self-report health rating, body mass index, and the presence or history of self-reported physical illness. Depressive symptoms were assessed using the Center for Epidemiologic Studies-Depression Scale (CES-D). The occurrence of depression diagnosis was assessed using the Clinical Interview for DSM-IV Axis I Disorders (SCID). Multiple linear and logistic regression analysis was used to examine the extent to which indices of physical health and depressive symptoms accounted for variance in participants' depressive symptoms and depressive diagnoses. Self-reported indices of health (e.g., SF-36) accounted for a significant portion of variance in both CES-D scores and SCID diagnoses. Caregivers who reported worsened health tended to report increased symptoms of depression on the CES-D and increased likelihood of an SCID diagnosis of a depressive disorder. Self-reported health indices are helpful in identifying Hispanic dementia caregivers at risk for clinical levels of depression.

  20. Exploring the relationship between agricultural electricity consumption and output: New evidence from Turkish regional data

    International Nuclear Information System (INIS)

    Dogan, Eyup; Sebri, Maamar; Turkekul, Berna

    2016-01-01

    This study investigates the relationship between agricultural electricity consumption and agricultural output for a panel of 12 regions of Turkey for the period 1995–2013. In order to reveal the possible heterogeneity between regions, empirical analyses are conducted for the whole panel data and two sub-groups within the panel data; namely, coastal regions and non-coastal regions. The results from several panel unit root tests indicate that electricity consumption and output are stationary process at their levels for overall panel and the two specific groups. By using the OLS with regional fixed effects, this study finds that coefficient estimate of electricity consumption on output is statistically significant and positive for overall regions, coastal regions and non-coastal regions. In addition, the results from the Dumitrescu-Hurlin Granger causality test show that there is unidirectional causality running from agricultural output to electricity consumption for non-coastal regions, and there is bidirectional causality between agricultural electricity consumption and output for overall panel and coastal regions. Findings and policy implications are further discussed. - Highlights: •This study uses the recently developed Dumitrescu-Hurlin Granger causality test. •There is unidirectional causality running from agricultural output to electricity consumption for non-coastal regions. •Bidirectional causality runs between the analyzed variables for coastal regions. •Electricity consumption increases agricultural output.

  1. Exploring the victimization‒early substance misuse relationship: In search of moderating and mediating effects.

    Science.gov (United States)

    Walters, Glenn D; Espelage, Dorothy L

    2018-07-01

    This study was designed to address two research questions. The first research question asked whether physical abuse victimization at the hands of parents/guardians, bullying victimization at the hands of peers, and the abuse x bullying interaction encouraged early involvement in substance misuse. The second research question inquired as to whether the victimization‒substance misuse relationship was mediated by variables proposed by various theories and research studies-specifically, cognitive impulsivity, negative affect, and low self-esteem. A moderated mediation hypothesis was tested in a group of 865 (417 boys, 448 girls) schoolchildren from the Illinois Study of Bullying and Sexual Violence who were 10 to 15 years of age at the time of initial contact. A path analysis performed with three waves of data revealed that physical abuse and bullying victimization predicted substance misuse with mediation by cognitive impulsivity, but there was no evidence of moderation. On the basis of these results, it was concluded that victimization, whether through parental physical abuse or peer bullying, increases cognitive impulsivity, and that cognitive impulsivity, in turn, encourages early involvement in substance misuse. The practical implications of these results are that interventions designed to counter cognitive impulsivity and encourage cognitive control may be effective in preventing children traumatized by physical abuse and bullying from entering the early stages of a drug or substance using lifestyle. Copyright © 2018 Elsevier Ltd. All rights reserved.

  2. Exploring the relationship between socioeconomic status, control beliefs and exercise behavior: a multiple mediator model.

    Science.gov (United States)

    Murray, Terra C; Rodgers, Wendy M; Fraser, Shawn N

    2012-02-01

    The purpose of this study was to examine the relationship between control beliefs, socioeconomic status and exercise intentions and behavior. Specifically, we examined whether distal and proximal control beliefs mediated the association between socioeconomic status and exercise intentions and behavior. A one time, cross sectional mail out survey (N = 350) was conducted in a large urban Canadian city. Distal (i.e., personal constraints) and proximal (i.e., scheduling self-efficacy) control beliefs mediated the association between socioeconomic status and exercise, explaining approximately 30% of the variance. Proximal control beliefs (i.e., scheduling self-efficacy) partially mediated the association between socioeconomic status and intentions, with the models explaining approximately 50% of the variance. Compared to individuals with lower socioeconomic status, individuals with higher socioeconomic status reported more exercise and stronger intentions to exercise. This was at least partly because higher socioeconomic status respondents reported fewer barriers in their lives, and were more confident to cope with the scheduling demands of exercise.

  3. Victimization and Violence: An Exploration of the Relationship Between Child Sexual Abuse, Violence, and Delinquency.

    Science.gov (United States)

    Kozak, Rebecca Shoaf; Gushwa, Melinda; Cadet, Tamara J

    2018-05-24

    Child sexual abuse (CSA) continues to be a major public health issue with significant short- and long-term consequences. However, little contemporary research has examined the relationship between CSA and delinquent and violent behavior in adolescence. Children who have been sexually abused experience a unique form of victimization compared to children who have endured other forms of maltreatment, as CSA can result in feelings of shame, powerlessness and boundary violations. The purpose of this study was to examine the effect of CSA on delinquent and violent behavior in adolescence. We examined self-report data at the age 18 interview from the Longitudinal Studies of Child Abuse and Neglect (LONGSCAN) on measures of sexual abuse experience, and engagement in delinquent and violent behavior in the past year. All participants reported either a history of maltreatment or were identified at-risk based on demographic risk factors. Participants included 368 males and 445 females who self-reported experiences of CSA and delinquent and violent behavior (N = 813). Findings indicated that, when controlling for gender and race, the odds of engagement in delinquent and violent behavior for those who have experienced CSA are 1.7 times higher than for those who have not. Additionally, female victims of CSA were .52 times less likely to engage in violent and delinquent behavior compared to their male counterparts. Further efforts are needed to examine the effects of CSA on violent and delinquent behavior to better guide treatment efforts that prevent juvenile justice involvement.

  4. Implicit theories about intelligence and growth (personal best) goals: Exploring reciprocal relationships.

    Science.gov (United States)

    Martin, Andrew J

    2015-06-01

    There has been increasing interest in growth approaches to students' academic development, including value-added models, modelling of academic trajectories, growth motivation orientations, growth mindsets, and growth goals. This study sought to investigate the relationships between implicit theories about intelligence (incremental and entity theories) and growth (personal best, PB) goals - with particular interest in the ordering of factors across time. The study focused on longitudinal data of 969 Australian high school students. The classic cross-lagged panel design (using structural equation modelling) was employed to shed light on the ordering of Time 1 growth goals, incremental theories, and entity theories relative to Time 2 (1 year later) growth goals, incremental theories, and entity theories. Findings showed that Time 1 growth goals predicted Time 2 incremental theories (positively) and entity theories (negatively); Time 1 entity and incremental theories negatively predicted Time 2 incremental and entity theories respectively; but, Time 1 incremental theories and entity theories did not predict growth goals at Time 2. This suggests that entity and incremental theories are negatively reciprocally related across time, but growth goals seem to be directionally salient over incremental and entity theories. Implications for promoting growth goals and growth mindsets are discussed. © 2014 The British Psychological Society.

  5. Is better beautiful or is beautiful better? Exploring the relationship between beauty and category structure.

    Science.gov (United States)

    Sanders, Megan; Davis, Tyler; Love, Bradley C

    2013-06-01

    We evaluate two competing accounts of the relationship between beauty and category structure. According to the similarity-based view, beauty arises from category structure such that central items are favored due to their increased fluency. In contrast, the theory-based view holds that people's theories of beauty shape their perceptions of categories. In the present study, subjects learned to categorize abstract paintings into meaningfully labeled categories and rated the paintings' beauty, value, and typicality. Inconsistent with the similarity-based view, beauty ratings were highly correlated across conditions despite differences in fluency and assigned category structure. Consistent with the theory-based view, beautiful paintings were treated as central members for categories expected to contain beautiful paintings (e.g., art museum pieces), but not in others (e.g., student show pieces). These results suggest that the beauty of complex, real-world stimuli is not determined by fluency within category structure but, instead, interacts with people's prior knowledge to structure categories.

  6. Exploring Relationships Among Belief in Genetic Determinism, Genetics Knowledge, and Social Factors

    Science.gov (United States)

    Gericke, Niklas; Carver, Rebecca; Castéra, Jérémy; Evangelista, Neima Alice Menezes; Marre, Claire Coiffard; El-Hani, Charbel N.

    2017-12-01

    Genetic determinism can be described as the attribution of the formation of traits to genes, where genes are ascribed more causal power than what scientific consensus suggests. Belief in genetic determinism is an educational problem because it contradicts scientific knowledge, and is a societal problem because it has the potential to foster intolerant attitudes such as racism and prejudice against sexual orientation. In this article, we begin by investigating the very nature of belief in genetic determinism. Then, we investigate whether knowledge of genetics and genomics is associated with beliefs in genetic determinism. Finally, we explore the extent to which social factors such as gender, education, and religiosity are associated with genetic determinism. Methodologically, we gathered and analyzed data on beliefs in genetic determinism, knowledge of genetics and genomics, and social variables using the "Public Understanding and Attitudes towards Genetics and Genomics" (PUGGS) instrument. Our analyses of PUGGS responses from a sample of Brazilian university freshmen undergraduates indicated that (1) belief in genetic determinism was best characterized as a construct built up by two dimensions or belief systems: beliefs concerning social traits and beliefs concerning biological traits; (2) levels of belief in genetic determination of social traits were low, which contradicts prior work; (3) associations between knowledge of genetics and genomics and levels of belief in genetic determinism were low; and (4) social factors such as age and religiosity had stronger associations with beliefs in genetic determinism than knowledge. Although our study design precludes causal inferences, our results raise questions about whether enhancing genetic literacy will decrease or prevent beliefs in genetic determinism.

  7. Fragile and Conflict-Affected States: Exploring the Relationship Between Governance, Instability and Violence

    Directory of Open Access Journals (Sweden)

    Sebastian AJ Taylor

    2014-09-01

    Full Text Available ‘Fragile and conflict-affected states’ (FCAS constitute an increasingly important category of aid policy and action. But the category comprises a large and heterogeneous set of countries, problematizing coherent policy response which is often awkwardly split between boilerplate strategy and case-by-case approach. In both respects, efficiency of aid allocations is questionable. There is a need to disaggregate the category into smaller groups of countries, understood according to a more nuanced interpretation of the nature of their fragility. Disaggregation, however, is challenging insofar as it is hard to find a stable reference point internal to the category by which states’ relative performance – and causes of performance – can be determined. An alternative approach is to seek a reference point external to the entire FCAS category – for example a multilateral initiative – which allows us to explore systematic differences between those who sign up and those who do not. This research took the UN’s Scaling Up Nutrition (SUN initiative as such a mechanism. Splitting FCAS into two groups – those who had joined SUN within its initial two-year phase and those who had not – we reviewed a range of social, economic, political, institutional and conflict/instability indicators to identify areas of significant difference. An unexpected finding was that while SUN-joiners performed statistically better on governance, there was no difference between joiners and non-joiners on the level of instability and violence they suffered, suggesting that some countries, even at high levels of conflict disruption, can achieve areas of relatively good governance.

  8. In the wake of structural adjustment programs: Exploring the relationship between domestic policies and health outcomes in Argentina and Uruguay.

    Science.gov (United States)

    Oliver, Helen C

    2006-01-01

    The implementation of structural adjustment programs (SAPs) in developing countries has been followed by a marked reduction in their progress on economic growth, health outcomes, and social indicators. Comprehensive and contextualized explorations of the effects of SAPs are needed to assist health and social policy-makers in better determining responses to such programs that continue to dominate global trade, aid and debt cancellation negotiations. A comparative case study of Argentina and Uruguay was developed exploring the effects of SAPs on health. Using a framework developed to analyze the relationship between globalization and health, changes in domestic policies resulting from SAPs and the corresponding economic, social and health outcomes of the countries were explored. In general, SAPs were implemented with greater severity and speed in Argentina than in Uruguay, with the greatest differences occurring over the 1980s. The more gradual and modest reforms implemented in Uruguay were associated with better economic, social and health outcomes. Findings support those of previous studies demonstrating that countries that have maintained more dynamic public social and health programming while applying SAPs have been better able to protect the health of the most vulnerable sectors of society.

  9. Exploring the relationship between the magnetic frustration and the emergence of FFLO state on a triangular lattice

    International Nuclear Information System (INIS)

    Guo Jia; Jiang Hongmin; Li Jianxin

    2011-01-01

    The formation of the FFLO state on the anisotropic triangular lattices is investigated. Focus on the required lower critical magnetic field to enter the FFLO state. Magnetic frustration facilitates the formation of the FFLO state. Layered organic superconductors are good candidates for exploring the FFLO state. The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) unconventional superconductors attract renewed interest in recent years. However, an unambiguous experimental demonstration of the FFLO state is hindered by the stringent requirements for its realization. In this paper, we explore the relationship between the magnetic frustration and the emergence of the FFLO state on an anisotropic triangular lattice, based on the self-consistent calculation of the Bogoliubov-de Gennes equations. We find that the required lower critical magnetic field to enter the FFLO state decreases with the increase of both the anisotropic ratio and the on-site Coulomb repulsive interaction. This demonstrates that it is easier to enter the FFLO state on the structurally frustrated triangular lattice in comparison with the square lattice, and suggests that the layered organic superconductors with a triangular lattice may be good candidates for exploring the FFLO state.

  10. [Exploring the relationship between internalized stigma, insight and depression for inpatients with schizophrenia].

    Science.gov (United States)

    Bouvet, C; Bouchoux, A

    2015-10-01

    Recent studies on insight in people with schizophrenia showed that insight level is linked with treatment compliance. Therefore, many therapies are aimed at increasing the insight level, such as psycho-education. However, insight level is also probably linked with depression level. So, improving insight is at risk of increasing the level of depression. Nevertheless, results on this topic are not consensual in the scientific literature. Presumably, this could be due to the concept of insight itself, although we could hypothesise that some confounding variables are implied in the interaction between insight and depression, such as internalized stigma. to test the hypothesis that the relationship between insight and depression is mediated by internalized stigma in people with schizophrenia. Sixty-two patients with schizophrenia (DSM-IV or ICD-10) recruited in mental health services in Île de France (75% male), aged 20 to 64 years (m=38.71, σ=0. 43), filled in questionnaires assessing internalized stigma (ISMI), depression (CDSS and BDI) and insight (SAIQ, Q8, IS), after giving their written informed consent. Correlations between insight, depression and different variables were made (Hypothesis 1). Then we ran multiple regressions and partial correlations to test the internalized stigma mediation (Hypothesis 2). Insight, internalized stigma and depression are statistically significantly correlated with each scales used (except Q8). Insight is correlated with depressed mood (correlations between IS and CDSS: r=0.27, P=0.04, and BDI, r=0.40, P=0.001). We also found negative correlations between SAIQ and CDSS (r=-0.35, P=0.005) and the BDI (r=-0.4265, P=0.000) which means that good insight is linked with depression. This result validates our hypothesis 1. The statistic tests reveal other complementary results: the association between insight and depression is mediated by the level of internalized stigma: when ISMI is controlled, the correlation between insight and

  11. Exploring relationships between hospital patient safety culture and Consumer Reports safety scores.

    Science.gov (United States)

    Smith, Scott Alan; Yount, Naomi; Sorra, Joann

    2017-02-16

    A number of private and public companies calculate and publish proprietary hospital patient safety scores based on publicly available quality measures initially reported by the U.S. federal government. This study examines whether patient safety culture perceptions of U.S. hospital staff in a large national survey are related to publicly reported patient safety ratings of hospitals. The Agency for Healthcare Research and Quality Hospital Survey on Patient Safety Culture (Hospital SOPS) assesses provider and staff perceptions of hospital patient safety culture. Consumer Reports (CR), a U.S. based non-profit organization, calculates and shares with its subscribers a Hospital Safety Score calculated annually from patient experience survey data and outcomes data gathered from federal databases. Linking data collected during similar time periods, we analyzed relationships between staff perceptions of patient safety culture composites and the CR Hospital Safety Score and its five components using multiple multivariate linear regressions. We analyzed data from 164 hospitals, with patient safety culture survey responses from 140,316 providers and staff, with an average of 856 completed surveys per hospital and an average response rate per hospital of 56%. Higher overall Hospital SOPS composite average scores were significantly associated with higher overall CR Hospital Safety Scores (β = 0.24, p Consumer Reports Hospital Safety Score, which is a composite of patient experience and outcomes data from federal databases. As hospital managers allocate resources to improve patient safety culture within their organizations, their efforts may also indirectly improve consumer-focused, publicly reported hospital rating scores like the Consumer Reports Hospital Safety Score.

  12. Cross-country skiing movement factorization to explore relationships between skiing economy and athletes' skills.

    Science.gov (United States)

    Pellegrini, B; Zoppirolli, C; Boccia, G; Bortolan, L; Schena, F

    2018-02-01

    We investigated the relationships between the biomechanics of the double poling (DP) technique in cross-country skiing, its economy, and athletes' skill. To this aim, skiers' motion has been factorized into components through principal component analysis (PCA). Eight high-level (HL) and eight regional level (RL) male cross-country skiers performed a 5-minute submaximal DP trial while roller skiing on a treadmill at 14 km h -1 and 2° incline. Whole-body kinematics was recorded with a motion capture system. PCA was applied to markers coordinates to extract principal movements (PM k ), which were ranked by their variance. Energy cost (EC) of locomotion was calculated from ergospirometric measurements. Results showed that 96.7%±0.6% of total skiing pattern variance can be described with the first three PM k. (Shoulder and trunk flexion-extension are described PM 1 and PM 2 and elbow flexion-extension are mainly represented in PM 2 and PM 3. The variance of further components, consisting of residual movements (eg, slow postural changes or high-frequency vibrations), was greater for the RL than the HL skiers (4.0%±0.5% vs 2.6%±0.3%; P<.001) and was positively correlated with EC (R 2 =.646; P<.001). PCA permitted to describe the biomechanics of the DP technique through a limited set of principal movements. Skiing skills and economy appeared to be related to a skier's ability to simplify movement complexity, suggesting that an efficient skier is better able to reduce superfluous movement components during DP. © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  13. Exploring the relationship between subjective wellbeing and groundwater attitudes and practices of farmers in Rural India

    Science.gov (United States)

    Ward, J.; Varua, M. E.; Maheshwari, B.; Oza, S.; Purohit, R.; Hakimuddin; Dave, S.

    2016-09-01

    Failure to effectively coordinate opportunistic extractions by individual well owners with groundwater recharge has led to increasing Indian groundwater scarcity, affecting future opportunities for improved rural livelihoods and household wellbeing. Investigation of the relationship between groundwater institutions, management attitudes and subjective wellbeing of Indian rural households has substantial potential to reveal initiatives that jointly improve aquifer sustainability and household wellbeing, yet has received limited attention. Subjective wellbeing was calculated as an index of dissatisfaction (IDS), revealing ranked importance and the level of dissatisfaction of individual factors selected from economic, environmental and social/relational wellbeing dimensions. High economic and environmental IDS scores were calculated for respondents in the Meghraj and Dharta watersheds, India, respectively. We tested an exploratory hypothesis that observed IDS differences were correlated with differences in life circumstances, (household attributes, income and assets) and psychological disposition (life guiding values and willingness to adapt). The distribution of ranked IDS wellbeing scores was estimated across four statistically distinct clusters reflecting attitudes towards sustainable groundwater management and practice. Decision tree analysis identified significantly different correlates of overall wellbeing specific to cluster membership and the watershed, supporting the research hypothesis. High income IDS scores were weakly correlated with actual total household income (r < 0.25) consistent with international studies. The results suggest a singular reliance on initiatives to improve household income is unlikely to manifest as improved individual subjective wellbeing for the Dharta and Meghraj watersheds. In conclusion, correlates were tabulated into a systematic decision framework to assist the design of participatory processes at the village level, by

  14. An Integrated Approach to Explore the Relationship Among Economic, Construction Land Use, and Ecology Subsystems in Zhejiang Province, China

    Directory of Open Access Journals (Sweden)

    Chuyu Xia

    2016-05-01

    Full Text Available Zhejiang Province, China is experiencing rapid urbanization, facing the challenge of coupling socioeconomic development and ecological conservation. This paper establishes a comprehensive index system to assess coordinating development of economic, construction land use (CLU, and ecology subsystems. A Granger test and a coupling coordination model were applied to explore the causal relationship and the coordinated development state among the three subsystems from 2000 to 2012. The results showed that: (1 changes in the integrated value of the economic subsystem were the Granger cause of changes in the ecology and CLU subsystems, and the changes in the integrated values of ecology and CLU was each other’s Granger cause; (2 the coupling coordination relationship of the integrated value for economic–CLU–ecology was constrained by the relationship between the economic and the CLU subsystems from 2000 to 2004, and that between the ecology and the economic subsystems was the impediment of the sustainable development of economic–CLU–ecology from 2004 to 2012. This research helps to identify approach to sustainable development through analyzing synergistic effects, interdependencies, and trade-offs among the integrated economic–CLU–ecology values, and to make significant contribution to urban planning policies in rapid urbanization region.

  15. Exploring the relationship between posttraumatic growth, cognitive processing, psychological distress, and social constraints in a sample of breast cancer patients.

    Science.gov (United States)

    Koutrouli, Natalia; Anagnostopoulos, Fotios; Griva, Fay; Gourounti, Kleanthi; Kolokotroni, Filippa; Efstathiou, Vasia; Mellon, Robert; Papastylianou, Dona; Niakas, Dimitris; Potamianos, Gregory

    2016-01-01

    Posttraumatic growth (the perception of positive life changes after an encounter with a trauma) often occurs among breast cancer patients and can be influenced by certain demographic, medical, and psychosocial parameters. Social constraints on disclosure (the deprivation of the opportunity to express feelings and thoughts regarding the trauma) and the cognitive processing of the disease seem to be involved in the development of posttraumatic growth. Through the present study the authors aim to: investigate the levels of posttraumatic growth in a sample of 202 women with breast cancer in Greece, explore the relationships between posttraumatic growth and particular demographic, medical, and psychosocial variables according to a proposed model, and test the role of social constraints in the relationship between automatic and deliberate cognitive processing of the trauma. The results showed that posttraumatic growth was evident in the majority of the sample and was associated inversely with age at diagnosis (β = -0.174, p psychological distress (β = -0.394, p = .001), directly with time since diagnosis (β = 0.181, p psychological distress, through reflective rumination (β = 0.323, p = .001). Social constraints were found to moderate the relationship between intrusions and reflective rumination. Implications of the results and suggestions for future research and practice are outlined.

  16. Love matters: exploring conceptions of love in Rwanda and Swaziland and relationship to HIV and intimate partner violence.

    Science.gov (United States)

    Ruark, Allison; Stern, Erin; Dlamini-Simelane, Thandeka; Kakuze, Marie Fidele

    2017-12-01

    Health risks such as intimate partner violence (IPV) and HIV infection often occur within intimate sexual relationships, yet the study of love and intimacy is largely absent from health research on African populations. This study explores how women and men in Rwanda and Swaziland understand and represent love in their intimate sexual partnerships. In Rwanda, 58 in-depth interviews with 15 couples, 12 interviews with activists, and 24 focus group discussions were carried out during formative and evaluative research of the Indashyikirwa programme, which aims to reduce IPV and support healthy couple relationships. In Swaziland, 117 in-depth, life-course interviews with 14 women and 14 men focused on understanding intimate sexual partnerships. We analysed these qualitative data thematically using a Grounded Theory approach. Participants described love as being foundational to their intimate sexual partnerships. Women and men emphasised that love is seen and expressed through actions and tangible evidence such as gifts and material support, acts of service, showing intentions for marriage, sexual faithfulness, and spending time together. Some participants expressed ambivalent narratives regarding love, gifts, and money, acknowledging that they desired partners who demonstrated love through material support while implying that true love should be untainted by desires for wealth. IPV characterised many relationships and was perceived as a threat to love, even as love was seen as a potential antidote to IPV. Careful scholarship of love is critical to better understand protective and risk factors for HIV and IPV and for interventions that seek to ameliorate these risks.

  17. Young people at risk of psychosis: a user-led exploration of interpersonal relationships and communication of psychological difficulties.

    Science.gov (United States)

    Byrne, Rory; Morrison, Anthony P

    2010-05-01

    The aim of the present study was to qualitatively explore experiences and perceptions of interpersonal relationships and interpersonal communication among young people at risk of psychosis. Semi-structured interviews were conducted using a qualitative grounded theory approach. Participants had entered into a service providing psychological interventions for young people assessed to be at a high risk of developing psychosis (Northwest UK). Our sample comprised one female and seven male participants (n = 8), ranging in age from 16 to 28 years, with a mean age of 22.4 years. Analyses identified three central themes: difficulty with interpersonal relationships and reduced opportunities for helpful communication, difficulty talking to others about psychological problems, and experiences of talking to others about psychological problems. Individuals at risk of psychosis may have experienced significant difficulties with interpersonal relationships. Such difficulties may contribute directly to the development of unusual psychological experiences, and to an inability or reluctance to communicate these to others. In addition, commonly held stigmatizing ideas associated with unusual psychological experiences may contribute to a fear among at-risk individuals that they are 'going mad', and this may lead to concealment of their difficulties, and to delayed help-seeking. For at-risk individuals, helpful communication of psychological distress offers significant benefits, including improved psychological and emotional well-being and reduced risk of psychosis. Thus, while concealment of distress may directly impact on the development of unusual psychological difficulties, communication of such difficulties may be central to recovery.

  18. Exploring the Relationships Between Just-In-Time Technique and Manufacturing Performance: Empirical Evidence From Selected Nigerian Firms

    Directory of Open Access Journals (Sweden)

    Ph. D. John Kolade Obamiro

    2009-12-01

    Full Text Available This study explores the relationship between just-in-time technique and manufacturing performance of some selected Nigerian companies. Just-in time was considered to be an overall organisational phenomenon. Data were obtained through a structured questionnaire from a sample size of 300 knowledgeable employees to test the developed model and formulated hypotheses that cover both just-intime and the supporting infrastructures. Bivariate correlation analysis was used to test the three hypotheses. The results showed that: (1 there was a significant relationship between total quality management (supporting infrastructure and just-in-time practices; (2 Human resources management (supporting infrastructure was positively related to just-in-time practices; (3 there was a positive significant relationship between Just-in-time practices and manufacturing performance. These results demonstrate that justin- time practices can be successfully implemented if certain supporting infrastructures are provided, and also support the notion that just-in-time should be practiced at all levels and departments of the organisation, rather than viewing it strictly for shop floor workers.

  19. Exploring adverse parent-child relationships from the perspective of convicted child murderers: A South African qualitative study.

    Directory of Open Access Journals (Sweden)

    Bianca Dekel

    Full Text Available Child homicide is the most extreme form of violence against children. Within South Africa, children face the highest risk of homicide by parents/caregivers. It is suggested that prolonged exposure to adverse relationships with one's own parents may be linked to committing child homicide as it may lead to psychological damage and disturb neurological functioning. This paper explores the adverse parent-child relationships of 22 men and women incarcerated for the murder of either a biological child, a stepchild or a child in their care and draws on 49 in-depth interviews with these participants. We illustrate that traumatic parent-child experiences in the form of absent parents, neglect and abuse have a profound impact on establishing unhealthy attachment styles and emphasize the importance of early adverse parent-child bonds in setting the tone for future bonds as adults. The pathway to adopting an adverse attachment with one's own child is argued to be influenced by these early traumatic emotional experiences within the home. This study highlights the need to acknowledge the impact that adverse parent-child experiences have on the formation of violent forms of parental behavior. It is imperative to reduce children's emotional vulnerabilities by implementing strategies to strengthen current parenting practices, to promote the development of less violent parent-child relationships and to work towards resolving parents' experiences of trauma in reducing child homicide.

  20. Exploring adverse parent-child relationships from the perspective of convicted child murderers: A South African qualitative study.

    Science.gov (United States)

    Dekel, Bianca; Abrahams, Naeemah; Andipatin, Michelle

    2018-01-01

    Child homicide is the most extreme form of violence against children. Within South Africa, children face the highest risk of homicide by parents/caregivers. It is suggested that prolonged exposure to adverse relationships with one's own parents may be linked to committing child homicide as it may lead to psychological damage and disturb neurological functioning. This paper explores the adverse parent-child relationships of 22 men and women incarcerated for the murder of either a biological child, a stepchild or a child in their care and draws on 49 in-depth interviews with these participants. We illustrate that traumatic parent-child experiences in the form of absent parents, neglect and abuse have a profound impact on establishing unhealthy attachment styles and emphasize the importance of early adverse parent-child bonds in setting the tone for future bonds as adults. The pathway to adopting an adverse attachment with one's own child is argued to be influenced by these early traumatic emotional experiences within the home. This study highlights the need to acknowledge the impact that adverse parent-child experiences have on the formation of violent forms of parental behavior. It is imperative to reduce children's emotional vulnerabilities by implementing strategies to strengthen current parenting practices, to promote the development of less violent parent-child relationships and to work towards resolving parents' experiences of trauma in reducing child homicide.

  1. Particles with changeable topology in nematic colloids

    International Nuclear Information System (INIS)

    Ravnik, Miha; Čopar, Simon; Žumer, Slobodan

    2015-01-01

    We show that nematic colloids can serve as a highly variable and controllable platform for studying inclusions with changeable topology and their effects on the surrounding ordering fields. We explore morphing of toroidal and knotted colloidal particles into effective spheres, distinctively changing their Euler characteristic and affecting the surrounding nematic field, including topological defect structures. With toroidal particles, the inner nematic defect eventually transitions from a wide loop to a point defect (a small loop). Trefoil particles become linked with two knotted defect loops, mutually forming a three component link, that upon tightening transform into a two-component particle-defect loop link. For more detailed topological analysis, Pontryagin-Thom surfaces are calculated and visualised, indicating an interesting cascade of defect rewirings caused by the shape morphing of the knotted particles. (paper)

  2. Countable Fuzzy Topological Space and Countable Fuzzy Topological Vector Space

    Directory of Open Access Journals (Sweden)

    Apu Kumar Saha

    2015-06-01

    Full Text Available This paper deals with countable fuzzy topological spaces, a generalization of the notion of fuzzy topological spaces. A collection of fuzzy sets F on a universe X forms a countable fuzzy topology if in the definition of a fuzzy topology, the condition of arbitrary supremum is relaxed to countable supremum. In this generalized fuzzy structure, the continuity of fuzzy functions and some other related properties are studied. Also the class of countable fuzzy topological vector spaces as a generalization of the class of fuzzy topological vector spaces has been introduced and investigated.

  3. Exploring the relationships between housing, neighbourhoods and mental wellbeing for residents of deprived areas.

    Science.gov (United States)

    Bond, Lyndal; Kearns, Ade; Mason, Phil; Tannahill, Carol; Egan, Matt; Whitely, Elise

    2012-01-18

    Housing-led regeneration has been shown to have limited effects on mental health. Considering housing and neighbourhoods as a psychosocial environment, regeneration may have greater impact on positive mental wellbeing than mental ill-health. This study examined the relationship between the positive mental wellbeing of residents living in deprived areas and their perceptions of their housing and neighbourhoods. A cross-sectional study of 3,911 residents in 15 deprived areas in Glasgow, Scotland. Positive mental wellbeing was measured using the Warwick-Edinburgh Mental Wellbeing Scale. Using multivariate mulit-nomial logistic regressions and controlling for socio-demographic characteristics and physical health status, we found that several aspects of people's residential psychosocial environments were strongly associated with higher mental wellbeing. Mental wellbeing was higher when respondents considered the following: their neighbourhood had very good aesthetic qualities (RRR 3.3, 95% CI 1.9, 5.8); their home and neighbourhood represented personal progress (RRR 3.2 95% CI 2.2, 4.8; RRR 2.6, 95% CI 1.8, 3.7, respectively); their home had a very good external appearance (RRR 2.6, 95% CI 1.3, 5.1) and a very good front door (both an aesthetic and a security/control item) (RRR 2.1, 95% CI 1.2, 3.8); and when satisfaction with their landlord was very high (RRR 2.3, 95% CI 2.2,4.8). Perception of poor neighbourhood aesthetic quality was associated with lower wellbeing (RRR 0.4, 95% CI 0.3, 0.5). This study has shown that for people living in deprived areas, the quality and aesthetics of housing and neighbourhoods are associated with mental wellbeing, but so too are feelings of respect, status and progress that may be derived from how places are created, serviced and talked about by those who live there. The implication for regeneration activities undertaken to improve housing and neighbourhoods is that it is not just the delivery of improved housing that is important for

  4. Exploring the relationship between polycyclic aromatic hydrocarbons and sedimentary organic carbon in three Chinese lakes

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Fengchang; Xu, Libin; Liao, Haiqing; Zhao, Xiaoli [Chinese Research Academy of Environmental Sciences, Beijing (China). State Key Lab. of Environmental Criteria and Risk Assessment; Sun, Yongge [Zhejiang Univ., Hangzhou (China). Inst. of Environmental and Biogeochemistry; Guo, Jianyang [Chinese Academy of Sciences, Guiyang (China). State Key Lab. of Environmental Geochemistry

    2012-05-15

    Purpose: Previous studies have shown a positive correlation between concentrations of polycyclic aromatic hydrocarbons (PAHs) and total organic carbon (TOC) in lake sediments. However, with respect to the complex organic matter in recent sediments, it is still unclear which part of TOC plays a key role in controlling PAHs distributions in natural sediments. The aim of this study was to examine the relationships between PAHs and TOC components of different origins in lake sediments. Materials and methods: Sediment cores from three Chinese lakes with different trophic conditions - Lakes Bosten, Dianchi, and Poyang - were collected using a piston core sampler. The cores were sectioned into 1- or 2-cm intervals immediately after collection and transported on ice to the laboratory where they were stored at -20 C. The subsamples were freeze-dried and ground with a mortar and pestle for analyses. PAHs were analyzed by GC-MS and TOC was determined with a PE elemental analyzer after the removal of carbonates. Rock-Eval 6 pyrolysis technique was used to deconvolute the TOC in the sediments into free and volatile hydrocarbons (S1), kerogen-derived hydrocarbons (S2), and residual carbon (RC); S2 was further separated into thermal less stable macromolecular organic matter (S2a) and high molecular weight kerogens (S2b). Results and discussion: Positive correlations between TOC and PAHs were observed in these lakes. Results show that the more labile, minor components of TOC (S1 and S2a) played a more important role in controlling PAH distributions than the major components of TOC (S2b and RC), probably due to the different accessibilities of the organic components. The algae-derived organic carbon had a greater influence on the distribution of low molecular weight PAHs than that of high molecular weight PAHs in sediments. This suggests that PAHs scavenging in the water column by algae is mainly targeted at low molecular weight PAHs, and that preferential scavenging of low

  5. The dynamic interplay between DNA topoisomerases and DNA topology.

    Science.gov (United States)

    Seol, Yeonee; Neuman, Keir C

    2016-11-01

    Topological properties of DNA influence its structure and biochemical interactions. Within the cell, DNA topology is constantly in flux. Transcription and other essential processes, including DNA replication and repair, not only alter the topology of the genome but also introduce additional complications associated with DNA knotting and catenation. These topological perturbations are counteracted by the action of topoisomerases, a specialized class of highly conserved and essential enzymes that actively regulate the topological state of the genome. This dynamic interplay among DNA topology, DNA processing enzymes, and DNA topoisomerases is a pervasive factor that influences DNA metabolism in vivo. Building on the extensive structural and biochemical characterization over the past four decades that has established the fundamental mechanistic basis of topoisomerase activity, scientists have begun to explore the unique roles played by DNA topology in modulating and influencing the activity of topoisomerases. In this review we survey established and emerging DNA topology-dependent protein-DNA interactions with a focus on in vitro measurements of the dynamic interplay between DNA topology and topoisomerase activity.

  6. Spin-torque generation in topological insulator based heterostructures

    KAUST Repository

    Fischer, Mark H.

    2016-03-11

    Heterostructures utilizing topological insulators exhibit a remarkable spin-torque efficiency. However, the exact origin of the strong torque, in particular whether it stems from the spin-momentum locking of the topological surface states or rather from spin-Hall physics of the topological-insulator bulk, remains unclear. Here, we explore a mechanism of spin-torque generation purely based on the topological surface states. We consider topological-insulator-based bilayers involving ferromagnetic metal (TI/FM) and magnetically doped topological insulators (TI/mdTI), respectively. By ascribing the key theoretical differences between the two setups to location and number of active surface states, we describe both setups within the same framework of spin diffusion of the nonequilibrium spin density of the topological surface states. For the TI/FM bilayer, we find large spin-torque efficiencies of roughly equal magnitude for both in-plane and out-of-plane spin torques. For the TI/mdTI bilayer, we elucidate the dominance of the spin-transfer-like torque. However, we cannot explain the orders of magnitude enhancement reported. Nevertheless, our model gives an intuitive picture of spin-torque generation in topological-insulator-based bilayers and provides theoretical constraints on spin-torque generation due to topological surface states.

  7. LHCb Topological Trigger Reoptimization

    International Nuclear Information System (INIS)

    Likhomanenko, Tatiana; Khairullin, Egor; Rogozhnikov, Alex; Ustyuzhanin, Andrey; Ilten, Philip; Williams, Michael

    2015-01-01

    The main b-physics trigger algorithm used by the LHCb experiment is the so- called topological trigger. The topological trigger selects vertices which are a) detached from the primary proton-proton collision and b) compatible with coming from the decay of a b-hadron. In the LHC Run 1, this trigger, which utilized a custom boosted decision tree algorithm, selected a nearly 100% pure sample of b-hadrons with a typical efficiency of 60-70%; its output was used in about 60% of LHCb papers. This talk presents studies carried out to optimize the topological trigger for LHC Run 2. In particular, we have carried out a detailed comparison of various machine learning classifier algorithms, e.g., AdaBoost, MatrixNet and neural networks. The topological trigger algorithm is designed to select all ’interesting” decays of b-hadrons, but cannot be trained on every such decay. Studies have therefore been performed to determine how to optimize the performance of the classification algorithm on decays not used in the training. Methods studied include cascading, ensembling and blending techniques. Furthermore, novel boosting techniques have been implemented that will help reduce systematic uncertainties in Run 2 measurements. We demonstrate that the reoptimized topological trigger is expected to significantly improve on the Run 1 performance for a wide range of b-hadron decays. (paper)

  8. p-topological Cauchy completions

    Directory of Open Access Journals (Sweden)

    J. Wig

    1999-01-01

    Full Text Available The duality between “regular” and “topological” as convergence space properties extends in a natural way to the more general properties “p-regular” and “p-topological.” Since earlier papers have investigated regular, p-regular, and topological Cauchy completions, we hereby initiate a study of p-topological Cauchy completions. A p-topological Cauchy space has a p-topological completion if and only if it is “cushioned,” meaning that each equivalence class of nonconvergent Cauchy filters contains a smallest filter. For a Cauchy space allowing a p-topological completion, it is shown that a certain class of Reed completions preserve the p-topological property, including the Wyler and Kowalsky completions, which are, respectively, the finest and the coarsest p-topological completions. However, not all p-topological completions are Reed completions. Several extension theorems for p-topological completions are obtained. The most interesting of these states that any Cauchy-continuous map between Cauchy spaces allowing p-topological and p′-topological completions, respectively, can always be extended to a θ-continuous map between any p-topological completion of the first space and any p′-topological completion of the second.

  9. Seeking Help From Police for Intimate Partner Violence: Applying a Relationship Phase Framework to the Exploration of Victims' Evolving Needs.

    Science.gov (United States)

    Shearson, Kim M

    2017-11-01

    Intimate partner violence (IPV) is a pervasive social problem requiring multiple levels of intervention across sectors. Women experiencing IPV often seek assistance from police. Such help-seeking efforts are frequently perceived as problematic by both victims and police. A deeper understanding of victims' needs than is currently evident in the literature is needed to facilitate an appropriate, victim-centered police response across a diverse range of victim presentations. Applying a symbolic interactionist and feminist perspective and guided by a constructivist grounded theory approach, this qualitative study aimed to explore the application of Landenburger's model of entrapment in and recovery from violent relationships to understand victims' help-seeking needs when accessing police services. Semistructured interviews were conducted with 16 female victims residing in the culturally diverse Western metropolitan region of Melbourne, Australia. Fourteen victims participated in follow-up interviews. All victims primarily sought to stop the violence and hoped to find a powerful ally in police. Additional help-seeking needs were identified; subtle variations in victims' aspirations for safety, ego-support, and justice were found across the binding, enduring, disengaging, and recovery relationship phases. Victims progressed from focusing only on the immediate violent event during the binding phase to seeking to maintain long-term safety and exert their rights to protection and freedom from abuse in the recovery phase. While the operational response of police is dependent on level of violence and immediate concerns for victims' physical safety, victims' help-seeking aims are very much contingent upon their relationship phase and the associated strategies for managing the violence they use. In particular, this study provides insight into the needs of women in the enduring relationship phase, when factors such as diminished agency and low expectations of legal protection

  10. Seeing the "Big" Picture: Big Data Methods for Exploring Relationships Between Usage, Language, and Outcome in Internet Intervention Data.

    Science.gov (United States)

    Carpenter, Jordan; Crutchley, Patrick; Zilca, Ran D; Schwartz, H Andrew; Smith, Laura K; Cobb, Angela M; Parks, Acacia C

    2016-08-31

    Assessing the efficacy of Internet interventions that are already in the market introduces both challenges and opportunities. While vast, often unprecedented amounts of data may be available (hundreds of thousands, and sometimes millions of participants with high dimensions of assessed variables), the data are observational in nature, are partly unstructured (eg, free text, images, sensor data), do not include a natural control group to be used for comparison, and typically exhibit high attrition rates. New approaches are therefore needed to use these existing data and derive new insights that can augment traditional smaller-group randomized controlled trials. Our objective was to demonstrate how emerging big data approaches can help explore questions about the effectiveness and process of an Internet well-being intervention. We drew data from the user base of a well-being website and app called Happify. To explore effectiveness, multilevel models focusing on within-person variation explored whether greater usage predicted higher well-being in a sample of 152,747 users. In addition, to explore the underlying processes that accompany improvement, we analyzed language for 10,818 users who had a sufficient volume of free-text response and timespan of platform usage. A topic model constructed from this free text provided language-based correlates of individual user improvement in outcome measures, providing insights into the beneficial underlying processes experienced by users. On a measure of positive emotion, the average user improved 1.38 points per week (SE 0.01, t122,455=113.60, Peffect on change in well-being over time, illustrating which topics may be more beneficial than others when engaging with the interventions. In particular, topics that are related to addressing negative thoughts and feelings were correlated with improvement over time. Using observational analyses on naturalistic big data, we can explore the relationship between usage and well-being among

  11. Manufacturing tolerant topology optimization

    DEFF Research Database (Denmark)

    Sigmund, Ole

    2009-01-01

    In this paper we present an extension of the topology optimization method to include uncertainties during the fabrication of macro, micro and nano structures. More specifically, we consider devices that are manufactured using processes which may result in (uniformly) too thin (eroded) or too thick...... (dilated) structures compared to the intended topology. Examples are MEMS devices manufactured using etching processes, nano-devices manufactured using e-beam lithography or laser micro-machining and macro structures manufactured using milling processes. In the suggested robust topology optimization...... approach, under- and over-etching is modelled by image processing-based "erode" and "dilate" operators and the optimization problem is formulated as a worst case design problem. Applications of the method to the design of macro structures for minimum compliance and micro compliant mechanisms show...

  12. The Topological Vertex

    CERN Document Server

    Aganagic, M; Marino, M; Vafa, C; Aganagic, Mina; Klemm, Albrecht; Marino, Marcos; Vafa, Cumrun

    2005-01-01

    We construct a cubic field theory which provides all genus amplitudes of the topological A-model for all non-compact Calabi-Yau toric threefolds. The topology of a given Feynman diagram encodes the topology of a fixed Calabi-Yau, with Schwinger parameters playing the role of Kahler classes of Calabi-Yau. We interpret this result as an operator computation of the amplitudes in the B-model mirror which is the Kodaira-Spencer quantum theory. The only degree of freedom of this theory is an unconventional chiral scalar on a Riemann surface. In this setup we identify the B-branes on the mirror Riemann surface as fermions related to the chiral boson by bosonization.

  13. Riemann, topology, and physics

    CERN Document Server

    Monastyrsky, Michael I

    2008-01-01

    This significantly expanded second edition of Riemann, Topology, and Physics combines a fascinating account of the life and work of Bernhard Riemann with a lucid discussion of current interaction between topology and physics. The author, a distinguished mathematical physicist, takes into account his own research at the Riemann archives of Göttingen University and developments over the last decade that connect Riemann with numerous significant ideas and methods reflected throughout contemporary mathematics and physics. Special attention is paid in part one to results on the Riemann–Hilbert problem and, in part two, to discoveries in field theory and condensed matter such as the quantum Hall effect, quasicrystals, membranes with nontrivial topology, "fake" differential structures on 4-dimensional Euclidean space, new invariants of knots and more. In his relatively short lifetime, this great mathematician made outstanding contributions to nearly all branches of mathematics; today Riemann’s name appears prom...

  14. Knot topology in QCD

    International Nuclear Information System (INIS)

    Zou, L.P.; Zhang, P.M.; Pak, D.G.

    2013-01-01

    We consider topological structure of classical vacuum solutions in quantum chromodynamics. Topologically non-equivalent vacuum configurations are classified by non-trivial second and third homotopy groups for coset of the color group SU(N) (N=2,3) under the action of maximal Abelian stability group. Starting with explicit vacuum knot configurations we study possible exact classical solutions. Exact analytic non-static knot solution in a simple CP 1 model in Euclidean space–time has been obtained. We construct an ansatz based on knot and monopole topological vacuum structure for searching new solutions in SU(2) and SU(3) QCD. We show that singular knot-like solutions in QCD in Minkowski space–time can be naturally obtained from knot solitons in integrable CP 1 models. A family of Skyrme type low energy effective theories of QCD admitting exact analytic solutions with non-vanishing Hopf charge is proposed

  15. Topology of tiling spaces

    CERN Document Server

    Sadun, Lorenzo

    2008-01-01

    Aperiodic tilings are interesting to mathematicians and scientists for both theoretical and practical reasons. The serious study of aperiodic tilings began as a solution to a problem in logic. Simpler aperiodic tilings eventually revealed hidden "symmetries" that were previously considered impossible, while the tilings themselves were quite striking. The discovery of quasicrystals showed that such aperiodicity actually occurs in nature and led to advances in materials science. Many properties of aperiodic tilings can be discerned by studying one tiling at a time. However, by studying families of tilings, further properties are revealed. This broader study naturally leads to the topology of tiling spaces. This book is an introduction to the topology of tiling spaces, with a target audience of graduate students who wish to learn about the interface of topology with aperiodic order. It isn't a comprehensive and cross-referenced tome about everything having to do with tilings, which would be too big, too hard to ...

  16. Topology, calculus and approximation

    CERN Document Server

    Komornik, Vilmos

    2017-01-01

    Presenting basic results of topology, calculus of several variables, and approximation theory which are rarely treated in a single volume, this textbook includes several beautiful, but almost forgotten, classical theorems of Descartes, Erdős, Fejér, Stieltjes, and Turán. The exposition style of Topology, Calculus and Approximation follows the Hungarian mathematical tradition of Paul Erdős and others. In the first part, the classical results of Alexandroff, Cantor, Hausdorff, Helly, Peano, Radon, Tietze and Urysohn illustrate the theories of metric, topological and normed spaces. Following this, the general framework of normed spaces and Carathéodory's definition of the derivative are shown to simplify the statement and proof of various theorems in calculus and ordinary differential equations. The third and final part is devoted to interpolation, orthogonal polynomials, numerical integration, asymptotic expansions and the numerical solution of algebraic and differential equations. Students of both pure an...

  17. Algebraic topology a primer

    CERN Document Server

    Deo, Satya

    2018-01-01

    This book presents the first concepts of the topics in algebraic topology such as the general simplicial complexes, simplicial homology theory, fundamental groups, covering spaces and singular homology theory in greater detail. Originally published in 2003, this book has become one of the seminal books. Now, in the completely revised and enlarged edition, the book discusses the rapidly developing field of algebraic topology. Targeted to undergraduate and graduate students of mathematics, the prerequisite for this book is minimal knowledge of linear algebra, group theory and topological spaces. The book discusses about the relevant concepts and ideas in a very lucid manner, providing suitable motivations and illustrations. All relevant topics are covered, including the classical theorems like the Brouwer’s fixed point theorem, Lefschetz fixed point theorem, Borsuk-Ulam theorem, Brouwer’s separation theorem and the theorem on invariance of the domain. Most of the exercises are elementary, but sometimes chal...

  18. The Relationship of Career Decision-Making Self-Efficacy, Vocational Identity, and Career Exploration Behavior in African American High School Students

    Science.gov (United States)

    Gushue, George V.; Scanlan, Kolone R. L.; Pantzer, Karen M.; Clarke, Christine P.

    2006-01-01

    This study explores the relationship between the social cognitive construct of career decision-making self-efficacy and the outcome variables of vocational identity and career exploration behaviors in a sample of 72 urban African American high school students. The results indicate that higher levels of career decision-making self-efficacy are…

  19. Exploring the Reciprocal Relations between Nonsuicidal Self-Injury, Negative Emotions and Relationship Problems in Chinese Adolescents: A Longitudinal Cross-Lag Study

    Science.gov (United States)

    You, Jianing; Leung, Freedom; Fu, Kei

    2012-01-01

    The present study explored the reciprocal relations between nonsuicidal self-injury (NSSI), negative emotions and relationship problems in a community sample of 2,435 (57.6% females) Chinese adolescents. Participants completed measures assessing 12 NSSI behaviors, three negative emotions (depression, anxiety and tension), and relationship problems…

  20. Topological and non-topological soliton solutions to some time

    Indian Academy of Sciences (India)

    Topological and non-topological soliton solutions to some time-fractional differential equations ... These equations have been widely applied in many branches of nonlinear ... Department of Engineering Sciences, Faculty of Technology and ...

  1. Exploring the relationship between macroeconomic conditions and problem drinking as captured by Google searches in the U.S.

    Science.gov (United States)

    Frijters, Paul; Johnston, David W; Lordan, Grace; Shields, Michael A

    2013-05-01

    There is considerable policy interest in the impact of macroeconomic conditions on health-related behaviours and outcomes. This paper sheds new light on this issue by exploring the relationship between macroeconomic conditions and an indicator of problem drinking derived from state-level data on alcoholism-related Google searches conducted in the US over the period 2004-2011. We find the current recessionary period coincided with an almost 20% increase in alcoholism-related searches. Controlling for state and time-effects, a 5% rise in unemployment is followed in the next 12 months by an approximate 15% increase in searches. The use of Internet searches to inform on health-related behaviours and outcomes is in its infancy; but we suggest that the data provides important real-time information for policy-makers and can help to overcome the under-reporting in surveys of sensitive information. Copyright © 2013 Elsevier Ltd. All rights reserved.

  2. Sustainable Tourism Development: Exploring the Relationship of Travel Agents’ Education and Experience to Their Attitudes on Environmental Issues

    Directory of Open Access Journals (Sweden)

    Nazmiye Erdoğan

    2013-06-01

    Full Text Available This study explored the nature of environmental attitudes of travel agents and investigated the relationship of educational level and business experience to their views on 27 environment related issues that are connected with sustainability. Data were collected from 1620 travel agents in Turkey. It was found that considerable numbers of travel agents had environmentally friendly views in respect to the factors contributing to the environmental problems, outcomes of environmental protection activities, importance of environmental criteria and environmental sensitivity of public sector, private sector and NGOs. Chi-square analyses to test the two hypotheses did not provide support for all 27 items. However, travel agents with higher education and long business experience in tourism sector hold generally more sensitive views toward environmental issues and sustainable tourism.

  3. Exploring the Relationship of Organizational Culture and Implicit Leadership Theory to Performance Differences in the Nuclear and Fossil Energy Industry

    Science.gov (United States)

    Cravey, Kristopher J.

    Notable performance differences exist between nuclear and fossil power generation plants in areas such as safety, outage duration efficiency, and capacity factor. This study explored the relationship of organizational culture and implicit leadership theory to these performance differences. A mixed methods approach consisting of quantitative instruments, namely the Organizational Culture Assessment Instrument and the GLOBE Leadership Scales, and qualitative interviews were used in this study. Subjects were operations middle managers in a U.S. energy company that serves nuclear or fossil power plants. Results from the quantitative instruments revealed no differences between nuclear and fossil groups in regards to organizational culture types and implicit leadership theories. However, the qualitative results did reveal divergence between the two groups in regards to what is valued in the organization and how that drives behaviors and decision making. These organizational phenomenological differences seem to explain why performance differences exist between nuclear and fossil plants because, ultimately, they affect how the organization functions.

  4. Dirichlet topological defects

    International Nuclear Information System (INIS)

    Carroll, S.M.; Trodden, M.

    1998-01-01

    We propose a class of field theories featuring solitonic solutions in which topological defects can end when they intersect other defects of equal or higher dimensionality. Such configurations may be termed open-quotes Dirichlet topological defects,close quotes in analogy with the D-branes of string theory. Our discussion focuses on defects in scalar field theories with either gauge or global symmetries, in 3+1 dimensions; the types of defects considered include walls ending on walls, strings on walls, and strings on strings. copyright 1998 The American Physical Society

  5. Filters in topology optimization

    DEFF Research Database (Denmark)

    Bourdin, Blaise

    1999-01-01

    In this article, a modified (``filtered'') version of the minimum compliance topology optimization problem is studied. The direct dependence of the material properties on its pointwise density is replaced by a regularization of the density field using a convolution operator. In this setting...... it is possible to establish the existence of solutions. Moreover, convergence of an approximation by means of finite elements can be obtained. This is illustrated through some numerical experiments. The ``filtering'' technique is also shown to cope with two important numerical problems in topology optimization...

  6. CFT and topological recursion

    CERN Document Server

    Kostov, Ivan

    2010-01-01

    We study the quasiclassical expansion associated with a complex curve. In a more specific context this is the 1/N expansion in U(N)-invariant matrix integrals. We compare two approaches, the CFT approach and the topological recursion, and show their equivalence. The CFT approach reformulates the problem in terms of a conformal field theory on a Riemann surface, while the topological recursion is based on a recurrence equation for the observables representing symplectic invariants on the complex curve. The two approaches lead to two different graph expansions, one of which can be obtained as a partial resummation of the other.

  7. Topology from Neighbourhoods

    OpenAIRE

    Coghetto Roland

    2015-01-01

    Using Mizar [9], and the formal topological space structure (FMT_Space_Str) [19], we introduce the three U-FMT conditions (U-FMT filter, U-FMT with point and U-FMT local) similar to those VI, VII, VIII and VIV of the proposition 2 in [10]: If to each element x of a set X there corresponds a set B(x) of subsets of X such that the properties VI, VII, VIII and VIV are satisfied, then there is a unique topological structure on X such that, for each x ∈ X, B(x) is the set of neighborhoods of x ...

  8. Topology in Condensed Matter

    CERN Document Server

    Monastyrsky, M I

    2006-01-01

    This book reports new results in condensed matter physics for which topological methods and ideas are important. It considers, on the one hand, recently discovered systems such as carbon nanocrystals and, on the other hand, new topological methods used to describe more traditional systems such as the Fermi surfaces of normal metals, liquid crystals and quasicrystals. The authors of the book are renowned specialists in their fields and present the results of ongoing research, some of it obtained only very recently and not yet published in monograph form.

  9. Free topological vector spaces

    OpenAIRE

    Gabriyelyan, Saak S.; Morris, Sidney A.

    2016-01-01

    We define and study the free topological vector space $\\mathbb{V}(X)$ over a Tychonoff space $X$. We prove that $\\mathbb{V}(X)$ is a $k_\\omega$-space if and only if $X$ is a $k_\\omega$-space. If $X$ is infinite, then $\\mathbb{V}(X)$ contains a closed vector subspace which is topologically isomorphic to $\\mathbb{V}(\\mathbb{N})$. It is proved that if $X$ is a $k$-space, then $\\mathbb{V}(X)$ is locally convex if and only if $X$ is discrete and countable. If $X$ is a metrizable space it is shown ...

  10. Topological superconductivity, topological confinement, and the vortex quantum Hall effect

    International Nuclear Information System (INIS)

    Diamantini, M. Cristina; Trugenberger, Carlo A.

    2011-01-01

    Topological matter is characterized by the presence of a topological BF term in its long-distance effective action. Topological defects due to the compactness of the U(1) gauge fields induce quantum phase transitions between topological insulators, topological superconductors, and topological confinement. In conventional superconductivity, because of spontaneous symmetry breaking, the photon acquires a mass due to the Anderson-Higgs mechanism. In this paper we derive the corresponding effective actions for the electromagnetic field in topological superconductors and topological confinement phases. In topological superconductors magnetic flux is confined and the photon acquires a topological mass through the BF mechanism: no symmetry breaking is involved, the ground state has topological order, and the transition is induced by quantum fluctuations. In topological confinement, instead, electric charge is linearly confined and the photon becomes a massive antisymmetric tensor via the Stueckelberg mechanism. Oblique confinement phases arise when the string condensate carries both magnetic and electric flux (dyonic strings). Such phases are characterized by a vortex quantum Hall effect potentially relevant for the dissipationless transport of information stored on vortices.

  11. Photoinduced Topological Phase Transitions in Topological Magnon Insulators.

    Science.gov (United States)

    Owerre, S A

    2018-03-13

    Topological magnon insulators are the bosonic analogs of electronic topological insulators. They are manifested in magnetic materials with topologically nontrivial magnon bands as realized experimentally in a quasi-two-dimensional (quasi-2D) kagomé ferromagnet Cu(1-3, bdc), and they also possess protected magnon edge modes. These topological magnetic materials can transport heat as well as spin currents, hence they can be useful for spintronic applications. Moreover, as magnons are charge-neutral spin-1 bosonic quasiparticles with a magnetic dipole moment, topological magnon materials can also interact with electromagnetic fields through the Aharonov-Casher effect. In this report, we study photoinduced topological phase transitions in intrinsic topological magnon insulators in the kagomé ferromagnets. Using magnonic Floquet-Bloch theory, we show that by varying the light intensity, periodically driven intrinsic topological magnetic materials can be manipulated into different topological phases with different sign of the Berry curvatures and the thermal Hall conductivity. We further show that, under certain conditions, periodically driven gapped topological magnon insulators can also be tuned to synthetic gapless topological magnon semimetals with Dirac-Weyl magnon cones. We envision that this work will pave the way for interesting new potential practical applications in topological magnetic materials.

  12. Relationship between cognitive emotion regulation, social support, resilience and acute stress responses in Chinese soldiers: Exploring multiple mediation model.

    Science.gov (United States)

    Cai, Wen-Peng; Pan, Yu; Zhang, Shui-Miao; Wei, Cun; Dong, Wei; Deng, Guang-Hui

    2017-10-01

    The current study aimed to explore the association of cognitive emotion regulation, social support, resilience and acute stress responses in Chinese soldiers and to understand the multiple mediation effects of social support and resilience on the relationship between cognitive emotion regulation and acute stress responses. A total of 1477 male soldiers completed mental scales, including the cognitive emotion regulation questionnaire-Chinese version, the perceived social support scale, the Chinese version of the Connor-Davidson resilience scale, and the military acute stress scale. As hypothesized, physiological responses, psychological responses, and acute stress were associated with negative-focused cognitive emotion regulation, and negatively associated with positive-focused cognitive emotion regulation, social supports and resilience. Besides, positive-focused cognitive emotion regulation, social support, and resilience were significantly associated with one another, and negative-focused cognitive emotion regulation was negatively associated with social support. Regression analysis and bootstrap analysis showed that social support and resilience had partly mediating effects on negative strategies and acute stress, and fully mediating effects on positive strategies and acute stress. These results thus indicate that military acute stress is significantly associated with cognitive emotion regulation, social support, and resilience, and that social support and resilience have multiple mediation effects on the relationship between cognitive emotion regulation and acute stress responses. Copyright © 2017 Elsevier B.V. All rights reserved.

  13. Exploring the relationship between postmigratory stressors and mental health for asylum seekers and refused asylum seekers in the UK.

    Science.gov (United States)

    Morgan, Gareth; Melluish, Steve; Welham, Alice

    2017-01-01

    Numerous studies have linked the high rates of traumatic events experienced by refugees to the elevated rate of mental health problems in these populations. A growing body of evidence has also highlighted the importance of considering postmigratory stressors when making sense of displaced person distress. This study explored the relationship between mental health and postmigratory stress for asylum seekers and refused asylum seekers in Britain. The study further examined if those refused asylum experienced elevated distress and postmigratory stress compared to those awaiting the outcome of asylum applications. Results indicated that participants ( N = 97) had endured a range of pre- and postmigratory stressors and had high scores on measures of anxiety, depression, and PTSD. A postmigratory factor comprising items associated with isolation, restrictive policies, and stressors associated with having an insecure immigration status, was significantly associated with PTSD scores. This relationship remained when controlling for the variance accounted for by premigratory trauma predictors. Being refused asylum was the strongest predictor of depression and anxiety. Those refused asylum scored higher on a factor associated with barriers to accessing services. Social materialist theories of distress are drawn upon to contextualise the heightened vulnerability of those refused asylum. The paper concludes by emphasising the problems associated with taking an exclusively trauma-focussed approach when working with asylum seekers and argues for community orientated interventions to support displaced people to cope with the various stressors endured in exile.

  14. The relationship between cognitive ability, emotional intelligence and negative career thoughts: A study of career-exploring adults

    Directory of Open Access Journals (Sweden)

    Dennis Dahl

    2012-11-01

    Research purpose: This study investigated the relationship between cognitive ability, emotional intelligence and negative thoughts pertaining to career in a sample of unemployed, non-student adults. Motivation for study: There is a need for research which investigates the psychological factors that contribute to successful career exploration and decision-making. Cognitive ability is one such factor, whilst emotional intelligence is another whose validity is not yet well established. Research design, approach and method: A survey design and quantitative procedures were used in gathering and analysing data gathered from 193 non-student, middle-aged adults attending a community-based career exploration programme in British Columbia, Canada. Cognitive ability, emotional intelligence and negative career thoughts before and after a career exploration programme were measured. Main findings: Neither cognitive ability nor any aspect of emotional intelligence predicted negative career thinking change. Cognitive ability predicted overall negative career thoughts as well as decision-making confusion, but only after the programme. The ability to manage emotions, however, predicted negative career thoughts both before and after the career decision-making programme. Practical/managerial implications: The managing emotions component of emotional intelligence is significantly associated with negative career thoughts. These findings suggest that career counselling requires that the role of emotions and their influence on behaviours must be given more consideration. Industrial and organisational (IO psychologists would benefit from engaging in programmes that train them to assist clients in becoming more aware of, and increasing, their own emotional intelligence. Contribution/value-add: The study added insights to the field of career psychology regarding the ability of emotional intelligence to predict important outcomes regarding the dimensions of emotional intelligence (EI as

  15. Exploring the relationship between premarital sex and cigarette/alcohol use among college students in Taiwan: a cohort study

    Directory of Open Access Journals (Sweden)

    Chiao Chi

    2012-07-01

    Full Text Available Abstract Background Cigarette/alcohol use and premarital sex, and their subsequent consequences on the well-being of college students, are international health promotion issues. However, little is known about the temporal relationship of these risk behaviors among Taiwanese college students. Methods This study utilizes data from the Taiwan Youth Project, a cohort sample of 20-year-olds (N = 2,119 with a 2-year follow-up, to explore the relationship between adolescent cigarette/alcohol use, and subsequent premarital sex. To incorporate the Taiwanese context where the normative value of abstinence until marriage remains strong, multivariate logistic regression models included data on premarital sex attitudes, stressful life events, peer influence, as well as family and individual factors which might influence this relationship. Results The sample consists of 49% male and 51% female college students. About 16% of the sample report having had premarital sex by age 20. After excluding sexually active youth, 20% of males and 13% of females report engaging in premarital sex in the 2-year follow-up interview. Multivariate logistic regression analyses reveal adolescent alcohol use is significantly associated with a higher likelihood of engaging in premarital sex for both genders; adolescent smoking is significantly associated with premarital sexual activity among males, but not females. Our results indicate liberal premarital sexual attitudes and stressful personal events are also significantly associated with premarital sexual activity. Conclusions These findings suggest health promotion programs for college students need to take developmental and gender perspectives into account. Future research to incorporate a broader, multi-cultural context into risk reduction materials is recommended.

  16. Exploring Data Collection Innovations by Examining the Effects of Relationship Marketing on Performance in Times of Crisis

    Directory of Open Access Journals (Sweden)

    Armando Luís Vieira

    2014-05-01

    Full Text Available The scientific quality, rigour, and impact of a considerable number, if not the vast majority, of marketing studies depend on an effective data collection process. Most of the researchers in these and related areas rely on traditional data collection tools, such as face-to-face, pen-andpaper, or online questionnaires, which are not very effective, both in terms of the time and money required to gather a reasonable number of observations. Bearing in mind that crises should also be an opportunity for researchers and institutions to develop more productive and effective research tools and procedures, the aim of this research is twofold: 1 to test a model that relates relationship marketing (RM efforts with performance; and 2 to explore innovative, more effective, data collection tools to be employed in a marketing research context. To this end, this study proposes and tests a model of the effects of RM antecedents and mediators on objective performance. The empirical work draws on the perceptions of 4,389 firm representatives in terms of their relationships with their counterparts in hotels, collected by using AppGeneration Npolls . Structural equation modelling results suggest that commitment is the strongest determinant of share of business, and fully mediates the impact of relationship quality (with satisfaction and trust as first-order dimensions on objective performance. From an innovative, methodological perspective, this study demonstrates that it is possible to collect a significantly high number of observations in a very short period of time, with considerable advantages when compared to traditional data collection procedures.

  17. Redesigning the DOE Data Explorer to Embed Dataset Relationships at the Point of Search and to Reflect Landing Page Organization

    Directory of Open Access Journals (Sweden)

    Sara Studwell

    2017-04-01

    Full Text Available Scientific research is producing ever-increasing amounts of data. Organizing and reflecting relationships across data collections, datasets, publications, and other research objects are essential functionalities of the modern science environment, yet challenging to implement. Landing pages are often used for providing ‘big picture’ contextual frameworks for datasets and data collections, and many large-volume data holders are utilizing them in thoughtful, creative ways. The benefits of their organizational efforts, however, are not realized unless the user eventually sees the landing page at the end point of their search. What if that organization and ‘big picture’ context could benefit the user at the beginning of the search? That is a challenging approach, but The Department of Energy’s (DOE Office of Scientific and Technical Information (OSTI is redesigning the database functionality of the DOE Data Explorer (DDE with that goal in mind. Phase I is focused on redesigning the DDE database to leverage relationships between two existing distinct populations in DDE, data Projects and individual Datasets, and then adding a third intermediate population, data Collections. Mapped, structured linkages, designed to show user relationships, will allow users to make informed search choices. These linkages will be sustainable and scalable, created automatically with the use of new metadata fields and existing authorities. Phase II will study selected DOE Data ID Service clients, analyzing how their landing pages are organized, and how that organization might be used to improve DDE search capabilities. At the heart of both phases is the realization that adding more metadata information for cross-referencing may require additional effort for data scientists. OSTI’s approach seeks to leverage existing metadata and landing page intelligence without imposing an additional burden on the data creators.

  18. Quality or quantity? Exploring the relationship between Public Open Space attributes and mental health in Perth, Western Australia.

    Science.gov (United States)

    Francis, Jacinta; Wood, Lisa J; Knuiman, Matthew; Giles-Corti, Billie

    2012-05-01

    Mental health is a public health priority globally. Public Open Space (POS) may enhance mental health by facilitating contact with nature and the development of supportive relationships. Despite growing interest in the influence of the built environment on mental health, associations between POS attributes and mental health remain relatively unexplored. In particular, few studies have examined the relative effects of the quantity and quality of POS within a neighbourhood on mental health. Guided by a social-ecological framework, this study investigated the relationship between POS attributes (i.e., quantity and quality) and better mental health (i.e., low risk of psychological distress) in residents of new housing developments in the Perth metropolitan area, Western Australia. The extent to which relationships between POS attributes and mental health were confounded by psychosocial factors (e.g., social support, sense of community) and frequent use of POS was also explored. Data were obtained from a cross-sectional survey (n = 911), a POS audit, and Geographical Information Systems, and was analysed using logistic regression. Approximately 80% of survey participants were at low risk of psychological distress. Residents of neighbourhoods with high quality POS had higher odds of low psychosocial distress than residents of neighbourhoods with low quality POS. This appeared to be irrespective of whether or not they used POS. However, the quantity of neighbourhood POS was not associated with low psychological distress. From a mental health perspective, POS quality within a neighbourhood appears to be more important than POS quantity. This finding has policy implications and warrants further investigation. Copyright © 2012 Elsevier Ltd. All rights reserved.

  19. Topological quantization of energy transport in micromechanical and nanomechanical lattices

    Science.gov (United States)

    Chien, Chih-Chun; Velizhanin, Kirill A.; Dubi, Yonatan; Ilic, B. Robert; Zwolak, Michael

    2018-03-01

    Topological effects typically discussed in the context of quantum physics are emerging as one of the central paradigms of physics. Here, we demonstrate the role of topology in energy transport through dimerized micro- and nanomechanical lattices in the classical regime, i.e., essentially "masses and springs." We show that the thermal conductance factorizes into topological and nontopological components. The former takes on three discrete values and arises due to the appearance of edge modes that prevent good contact between the heat reservoirs and the bulk, giving a length-independent reduction of the conductance. In essence, energy input at the boundary mostly stays there, an effect robust against disorder and nonlinearity. These results bridge two seemingly disconnected disciplines of physics, namely topology and thermal transport, and suggest ways to engineer thermal contacts, opening a direction to explore the ramifications of topological properties on nanoscale technology.

  20. Topological field theories and duality

    International Nuclear Information System (INIS)

    Stephany, J.; Universidad Simon Bolivar, Caracas

    1996-05-01

    Topologically non trivial effects appearing in the discussion of duality transformations in higher genus manifold are discussed in a simple example, and their relation with the properties of Topological Field Theories is established. (author). 16 refs

  1. Wireless sensor network topology control

    OpenAIRE

    Zuk, Olexandr; Romanjuk, Valeriy; Sova, Oleg

    2010-01-01

    Topology control process for the wireless sensor network is considered. In this article the use of rule base for making decision on the search of optimum network topology is offered for the realization of different aims of network management.

  2. Topology optimization of viscoelastic rectifiers

    DEFF Research Database (Denmark)

    Jensen, Kristian Ejlebjærg; Szabo, Peter; Okkels, Fridolin

    2012-01-01

    An approach for the design of microfluidic viscoelastic rectifiers is presented based on a combination of a viscoelastic model and the method of topology optimization. This presumption free approach yields a material layout topologically different from experimentally realized rectifiers...

  3. Towards topological quantum computer

    Science.gov (United States)

    Melnikov, D.; Mironov, A.; Mironov, S.; Morozov, A.; Morozov, An.

    2018-01-01

    Quantum R-matrices, the entangling deformations of non-entangling (classical) permutations, provide a distinguished basis in the space of unitary evolutions and, consequently, a natural choice for a minimal set of basic operations (universal gates) for quantum computation. Yet they play a special role in group theory, integrable systems and modern theory of non-perturbative calculations in quantum field and string theory. Despite recent developments in those fields the idea of topological quantum computing and use of R-matrices, in particular, practically reduce to reinterpretation of standard sets of quantum gates, and subsequently algorithms, in terms of available topological ones. In this paper we summarize a modern view on quantum R-matrix calculus and propose to look at the R-matrices acting in the space of irreducible representations, which are unitary for the real-valued couplings in Chern-Simons theory, as the fundamental set of universal gates for topological quantum computer. Such an approach calls for a more thorough investigation of the relation between topological invariants of knots and quantum algorithms.

  4. Slope constrained Topology Optimization

    DEFF Research Database (Denmark)

    Petersson, J.; Sigmund, Ole

    1998-01-01

    The problem of minimum compliance topology optimization of an elastic continuum is considered. A general continuous density-energy relation is assumed, including variable thickness sheet models and artificial power laws. To ensure existence of solutions, the design set is restricted by enforcing...

  5. Architecture, Drawing, Topology

    DEFF Research Database (Denmark)

    Meldgaard, Morten

    This book presents contributions of drawing and text along with their many relationalities from ontology to history and vice versa in a range of reflections on architecture, drawing and topology. We hope to thereby indicate the potential of the theme in understanding not only the architecture of ...

  6. LHCb Topological Trigger Reoptimization

    CERN Document Server

    INSPIRE-00400931; Ilten, Philip; Khairullin, Egor; Rogozhnikov, Alex; Ustyuzhanin, Andrey; Williams, Michael

    2015-12-23

    The main b-physics trigger algorithm used by the LHCb experiment is the so-called topological trigger. The topological trigger selects vertices which are a) detached from the primary proton-proton collision and b) compatible with coming from the decay of a b-hadron. In the LHC Run 1, this trigger, which utilized a custom boosted decision tree algorithm, selected a nearly 100% pure sample of b-hadrons with a typical efficiency of 60-70%; its output was used in about 60% of LHCb papers. This talk presents studies carried out to optimize the topological trigger for LHC Run 2. In particular, we have carried out a detailed comparison of various machine learning classifier algorithms, e.g., AdaBoost, MatrixNet and neural networks. The topological trigger algorithm is designed to select all "interesting" decays of b-hadrons, but cannot be trained on every such decay. Studies have therefore been performed to determine how to optimize the performance of the classification algorithm on decays not used in the training. ...

  7. Some geometry and topology

    International Nuclear Information System (INIS)

    Marmo, G.; Morandi, G.

    1995-01-01

    In this lecture some mathematical problems that arise when one deals with low-dimensional field theories, such as homotopy and topological invariants, differential calculus on Lie groups and coset spaces, fiber spaces and parallel transport, differential calculus on fiber bundles, sequences on principal bundles and Chern-Simons terms are discussed

  8. Coherence Multiplex System Topologies

    NARCIS (Netherlands)

    Meijerink, Arjan; Taniman, R.O.; Heideman, G.H.L.M.; van Etten, Wim

    2007-01-01

    Coherence multiplexing is a potentially inexpensive form of optical code-division multiple access, which is particularly suitable for short-range applications with moderate bandwidth requirements, such as access networks, LANs, or interconnects. Various topologies are known for constructing an

  9. Topological Trigger Developments

    CERN Multimedia

    Likhomanenko, Tatiana

    2015-01-01

    The main b-physics trigger algorithm used by the LHCb experiment is the so-called topological trigger. The topological trigger selects vertices which are a) detached from the primary proton-proton collision and b) compatible with coming from the decay of a b-hadron. In the LHC Run 1, this trigger utilized a custom boosted decision tree algorithm, selected an almost 100% pure sample of b-hadrons with a typical efficiency of 60-70%, and its output was used in about 60% of LHCb papers. This talk presents studies carried out to optimize the topological trigger for LHC Run 2. In particular, we have carried out a detailed comparison of various machine learning classifier algorithms, e.g., AdaBoost, MatrixNet and uBoost. The topological trigger algorithm is designed to select all "interesting" decays of b-hadrons, but cannot be trained on every such decay. Studies have therefore been performed to determine how to optimize the performance of the classification algorithm on decays not used in the training. These inclu...

  10. Towards topological quantum computer

    Directory of Open Access Journals (Sweden)

    D. Melnikov

    2018-01-01

    Full Text Available Quantum R-matrices, the entangling deformations of non-entangling (classical permutations, provide a distinguished basis in the space of unitary evolutions and, consequently, a natural choice for a minimal set of basic operations (universal gates for quantum computation. Yet they play a special role in group theory, integrable systems and modern theory of non-perturbative calculations in quantum field and string theory. Despite recent developments in those fields the idea of topological quantum computing and use of R-matrices, in particular, practically reduce to reinterpretation of standard sets of quantum gates, and subsequently algorithms, in terms of available topological ones. In this paper we summarize a modern view on quantum R-matrix calculus and propose to look at the R-matrices acting in the space of irreducible representations, which are unitary for the real-valued couplings in Chern–Simons theory, as the fundamental set of universal gates for topological quantum computer. Such an approach calls for a more thorough investigation of the relation between topological invariants of knots and quantum algorithms.

  11. Adjoint entropy vs topological entropy

    OpenAIRE

    Giordano Bruno, Anna

    2012-01-01

    Recently the adjoint algebraic entropy of endomorphisms of abelian groups was introduced and studied. We generalize the notion of adjoint entropy to continuous endomorphisms of topological abelian groups. Indeed, the adjoint algebraic entropy is defined using the family of all finite-index subgroups, while we take only the subfamily of all open finite-index subgroups to define the topological adjoint entropy. This allows us to compare the (topological) adjoint entropy with the known topologic...

  12. Topology of Document Retrieval Systems.

    Science.gov (United States)

    Everett, Daniel M.; Cater, Steven C.

    1992-01-01

    Explains the use of a topological structure to examine the closeness between documents in retrieval systems and analyzes the topological structure of a vector-space model, a fuzzy-set model, an extended Boolean model, a probabilistic model, and a TIRS (Topological Information Retrieval System) model. Proofs for the results are appended. (17…

  13. Comparing topological charge definitions using topology fixing actions

    International Nuclear Information System (INIS)

    Bruckmann, Falk; Gruber, Florian; Jansen, Karl; Marinkovic, Marina; Urbach, Carsten; Wagner, Marc

    2009-05-01

    We investigate both the hyperbolic action and the determinant ratio action designed to fix the topological charge on the lattice. We show to what extent topology is fixed depending on the parameters of these actions, keeping the physical situation fixed. At the same time the agreement between different definitions of topological charge - the field theoretic and the index definition - is directly correlated to the degree topology is fixed. Moreover, it turns out that the two definitions agree very well. We also study finite volume effects arising in the static potential and related quantities due to topology fixing. (orig.)

  14. Topological Aspects of the FAITH Experiment

    Science.gov (United States)

    Tobak, Murray; Long, Kurtis

    2010-01-01

    This slide presentation reviews the following issues (1) What is relationship between surface pressure extrema and singular points? (2) Does every singular point in a pattern of skin friction lines occur at a surface pressure extremum? (and/or vice versa?) (3) Can this relationship be generalized to all geometries? (4) FAITH Project (5) Ongoing effort at NASA Ames Experimental AeroPhysics Branch (6) Multi-parameter wind tunnel investigation of flow around obstacle (7) Acquire data for CFD validation, optimization and (8) Relationship between FAITH and topology projects

  15. The relationship between cognitive ability, emotional intelligence and negative career thoughts: A study of career-exploring adults

    Directory of Open Access Journals (Sweden)

    Dennis Dahl

    2012-11-01

    Full Text Available Orientation: Career exploration can be a stressful experience, often manifested by negative career thoughts. In this article, the factors which influence the ability to cope with negative thinking are investigated.Research purpose: This study investigated the relationship between cognitive ability, emotional intelligence and negative thoughts pertaining to career in a sample of unemployed, non-student adults.Motivation for study: There is a need for research which investigates the psychological factors that contribute to successful career exploration and decision-making. Cognitive ability is one such factor, whilst emotional intelligence is another whose validity is not yet well established.Research design, approach and method: A survey design and quantitative procedures were used in gathering and analysing data gathered from 193 non-student, middle-aged adults attending a community-based career exploration programme in British Columbia, Canada. Cognitive ability, emotional intelligence and negative career thoughts before and after a career exploration programme were measured.Main findings: Neither cognitive ability nor any aspect of emotional intelligence predicted negative career thinking change. Cognitive ability predicted overall negative career thoughts as well as decision-making confusion, but only after the programme. The ability to manage emotions, however, predicted negative career thoughts both before and after the career decision-making programme.Practical/managerial implications: The managing emotions component of emotional intelligence is significantly associated with negative career thoughts. These findings suggest that career counselling requires that the role of emotions and their influence on behaviours must be given more consideration. Industrial and organisational (IO psychologists would benefit from engaging in programmes that train them to assist clients in becoming more aware of, and increasing, their own emotional

  16. Fine topology and locally Minkowskian manifolds

    Science.gov (United States)

    Agrawal, Gunjan; Sinha, Soami Pyari

    2018-05-01

    Fine topology is one of the several well-known topologies of physical and mathematical relevance. In the present paper, it is obtained that the nonempty open sets of different dimensional Minkowski spaces with the fine topology are not homeomorphic. This leads to the introduction of a new class of manifolds. It turns out that the technique developed here is also applicable to some other topologies, namely, the s-topology, space topology, f-topology, and A-topology.

  17. Are Mentor Relationships Helping Organizations? An Exploration of Developing Mentee-Mentor-Organizational Identifications Using Turning Point Analysis.

    Science.gov (United States)

    Bullis, Connie; Bach, Betsy Wackernagel

    1989-01-01

    Examines developing mentor relationships and the association between mentor relationships and individual-organizational relationships. Indicates that many turning points occur later than proposed in broad-phase models of mentor relationship development. Finds that mentor relationships should not be assumed to benefit organizations. (SR)

  18. Topology optimized permanent magnet systems

    Science.gov (United States)

    Bjørk, R.; Bahl, C. R. H.; Insinga, A. R.

    2017-09-01

    Topology optimization of permanent magnet systems consisting of permanent magnets, high permeability iron and air is presented. An implementation of topology optimization for magnetostatics is discussed and three examples are considered. The Halbach cylinder is topology optimized with iron and an increase of 15% in magnetic efficiency is shown. A topology optimized structure to concentrate a homogeneous field is shown to increase the magnitude of the field by 111%. Finally, a permanent magnet with alternating high and low field regions is topology optimized and a Λcool figure of merit of 0.472 is reached, which is an increase of 100% compared to a previous optimized design.

  19. Undergraduate topology a working textbook

    CERN Document Server

    McCluskey, Aisling

    2014-01-01

    This textbook offers an accessible, modern introduction at undergraduate level to an area known variously as general topology, point-set topology or analytic topology with a particular focus on helping students to build theory for themselves. It is the result of several years of the authors' combined university teaching experience stimulated by sustained interest in advanced mathematical thinking and learning, alongside established research careers in analytic topology. Point-set topology is a discipline that needs relatively little background knowledge, but sufficient determination to grasp i

  20. Topology optimized permanent magnet systems

    DEFF Research Database (Denmark)

    Bjørk, Rasmus; Bahl, Christian; Insinga, Andrea Roberto

    2017-01-01

    Topology optimization of permanent magnet systems consisting of permanent magnets, high permeability iron and air is presented. An implementation of topology optimization for magnetostatics is discussed and three examples are considered. The Halbach cylinder is topology optimized with iron...... and an increase of 15% in magnetic efficiency is shown. A topology optimized structure to concentrate a homogeneous field is shown to increase the magnitude of the field by 111%. Finally, a permanent magnet with alternating high and low field regions is topology optimized and a ΛcoolΛcool figure of merit of 0...

  1. Nobel Lecture: Topological quantum matter*

    Science.gov (United States)

    Haldane, F. Duncan M.

    2017-10-01

    Nobel Lecture, presented December 8, 2016, Aula Magna, Stockholm University. I will describe the history and background of three discoveries cited in this Nobel Prize: The "TKNN" topological formula for the integer quantum Hall effect found by David Thouless and collaborators, the Chern insulator or quantum anomalous Hall effect, and its role in the later discovery of time-reversal-invariant topological insulators, and the unexpected topological spin-liquid state of the spin-1 quantum antiferromagnetic chain, which provided an initial example of topological quantum matter. I will summarize how these early beginnings have led to the exciting, and currently extremely active, field of "topological matter."

  2. Graph topologies on closed multifunctions

    Directory of Open Access Journals (Sweden)

    Giuseppe Di Maio

    2003-10-01

    Full Text Available In this paper we study function space topologies on closed multifunctions, i.e. closed relations on X x Y using various hypertopologies. The hypertopologies are in essence, graph topologies i.e topologies on functions considered as graphs which are subsets of X x Y . We also study several topologies, including one that is derived from the Attouch-Wets filter on the range. We state embedding theorems which enable us to generalize and prove some recent results in the literature with the use of known results in the hyperspace of the range space and in the function space topologies of ordinary functions.

  3. Anomalous resistivity and the evolution of magnetic field topology

    Science.gov (United States)

    Parker, E. N.

    1993-01-01

    This paper explores the topological restructuring of a force-free magnetic field caused by the hypothetical sudden onset of a localized region of strong anomalous resistivity. It is shown that the topological complexity increases, with the primitive planar force-free field with straight field lines developing field lines that wrap half a turn around each other, evidently providing a surface of tangential discontinuity in the wraparound region. It is suggested that the topological restructuring contributes to the complexity of the geomagnetic substorm, the aurora, and perhaps some of the flare activity on the sun, or other star, and the Galactic halo.

  4. Hall conductance and topological invariant for open systems.

    Science.gov (United States)

    Shen, H Z; Wang, W; Yi, X X

    2014-09-24

    The Hall conductivity given by the Kubo formula is a linear response of quantum transverse transport to a weak electric field. It has been intensively studied for quantum systems without decoherence, but it is barely explored for systems subject to decoherence. In this paper, we develop a formulism to deal with this issue for topological insulators. The Hall conductance of a topological insulator coupled to an environment is derived, the derivation is based on a linear response theory developed for open systems in this paper. As an application, the Hall conductance of a two-band topological insulator and a two-dimensional lattice is presented and discussed.

  5. Exploring the relationship between mental health stigma, knowledge and provision of pharmacy services for consumers with schizophrenia.

    Science.gov (United States)

    O'Reilly, Claire L; Bell, J Simon; Kelly, Patrick J; Chen, Timothy F

    2015-01-01

    Pharmacists' provision of medication counseling and medication review has been shown to improve adherence and resolve drug-related problems. Lack of knowledge of mental health conditions and negative beliefs may act as a barrier to the provision of pharmacy services. It is unclear how pharmacists' knowledge and attitudes impact their provision of pharmacy services. To explore the relationship between pharmacists' level of mental health stigma, mental health literacy and behavioral intentions in relation to providing pharmacy services for consumers with schizophrenia. A survey instrument containing a measure of mental health literacy, the 7-item social distance scale, and 16 items relating to the provision of pharmacy services for consumers with schizophrenia compared to cardiovascular disease, was mailed to a random sample of 1000 pharmacists registered with the Pharmacy Board of New South Wales in November 2009. Multiple linear regression models were used to assess the relationship between stigma, knowledge and behavior. Responses were received from 188 pharmacists. Pharmacists were significantly more confident and comfortable to provide services to consumers with a cardiovascular illness than a mental illness. Social distance, β = -0.11 (95% CI: -0.22, -0.01, P = 0.03), and schizophrenia literacy scores, β = 1.02, (95% CI: 0.54, 1.50, P mental health stigma and high levels of schizophrenia literacy were associated with pharmacists being more willing to provide medication counseling and identify drug-related problems for consumers with schizophrenia. This demonstrates the importance of improving knowledge and stigma surrounding schizophrenia to improve service delivery for consumers taking medications for schizophrenia. Copyright © 2015 Elsevier Inc. All rights reserved.

  6. Motives and activities for continuing professional development: An exploration of their relationships by integrating literature and interview data.

    Science.gov (United States)

    Pool, Inge A; Poell, Rob F; Berings, Marjolein G M C; Ten Cate, Olle

    2016-03-01

    To effectively enhance professional development, it is important to understand the motivational factors behind nurses' engagement in particular types of learning activities. Nurses have various motives for professional development and utilise different learning activities. Not much is known about how these relate. The aim of this study was to explore the relationship between nurses' motives and activities for continuing professional development, by examining in which types of learning activities nurses engage, with which motives, and whether certain motives are associated with certain learning activities. A qualitative study using semi-structured interviews. Twenty-one nurses in academic and general Dutch hospitals participated. Interview data on nurses' learning biographies were analysed using a literature-based framework on motives and learning activities for continuing professional development. As recent classifications of nurses' motives for professional development were absent, the literature was reviewed for motives, using three databases. The interview transcripts were analysed for motives, learning activities and their relationships. Nine motives and four categories of learning activities for continuing professional development were delineated. Increasing competence was the primary motive that stimulated nurses to engage in self-directed learning during work, and in formal learning activities. To comply with requirements, they engaged in mandatory courses. To deepen knowledge, they registered for conferences. To develop their careers, they enrolled in postgraduate education. Five other motives were not mentioned as frequently. Specific motives were found to be related to engagement in particular learning activities. Nurses could use these findings to increase their awareness of why and how they develop professionally, and managers and human resource development professionals could develop approaches that would better suit nurses' needs. Copyright © 2016

  7. Topology of foreign exchange markets using hierarchical structure methods

    Science.gov (United States)

    Naylor, Michael J.; Rose, Lawrence C.; Moyle, Brendan J.

    2007-08-01

    This paper uses two physics derived hierarchical techniques, a minimal spanning tree and an ultrametric hierarchical tree, to extract a topological influence map for major currencies from the ultrametric distance matrix for 1995-2001. We find that these two techniques generate a defined and robust scale free network with meaningful taxonomy. The topology is shown to be robust with respect to method, to time horizon and is stable during market crises. This topology, appropriately used, gives a useful guide to determining the underlying economic or regional causal relationships for individual currencies and to understanding the dynamics of exchange rate price determination as part of a complex network.

  8. Coherent topological phenomena in protein folding

    DEFF Research Database (Denmark)

    Bohr, Henrik; Brunak, Søren; Bohr, Jakob

    1997-01-01

    A theory is presented for coherent topological phenomena in protein dynamics with implications for protein folding and stability. We discuss the relationship to the writhing number used in knot diagrams of DNA. The winding state defines a long-range order along the backbone of a protein with long......-range excitations, `wring' modes, that play an important role in protein denaturation and stability. Energy can be pumped into these excitations, either thermally or by an external force....

  9. Computational topology and the Unique Games Conjecture

    OpenAIRE

    Grochow, Joshua A.; Tucker-Foltz, Jamie

    2018-01-01

    Covering spaces of graphs have long been useful for studying expanders (as "graph lifts") and unique games (as the "label-extended graph"). In this paper we advocate for the thesis that there is a much deeper relationship between computational topology and the Unique Games Conjecture. Our starting point is Linial's 2005 observation that the only known problems whose inapproximability is equivalent to the Unique Games Conjecture - Unique Games and Max-2Lin - are instances of Maximum Section of...

  10. Floquet topological insulators for sound

    Science.gov (United States)

    Fleury, Romain; Khanikaev, Alexander B.; Alù, Andrea

    2016-06-01

    The unique conduction properties of condensed matter systems with topological order have recently inspired a quest for the similar effects in classical wave phenomena. Acoustic topological insulators, in particular, hold the promise to revolutionize our ability to control sound, allowing for large isolation in the bulk and broadband one-way transport along their edges, with topological immunity against structural defects and disorder. So far, these fascinating properties have been obtained relying on moving media, which may introduce noise and absorption losses, hindering the practical potential of topological acoustics. Here we overcome these limitations by modulating in time the acoustic properties of a lattice of resonators, introducing the concept of acoustic Floquet topological insulators. We show that acoustic waves provide a fertile ground to apply the anomalous physics of Floquet topological insulators, and demonstrate their relevance for a wide range of acoustic applications, including broadband acoustic isolation and topologically protected, nonreciprocal acoustic emitters.

  11. Network topology mapper

    Science.gov (United States)

    Quist, Daniel A [Los Alamos, NM; Gavrilov, Eugene M [Los Alamos, NM; Fisk, Michael E [Jemez, NM

    2008-01-15

    A method enables the topology of an acyclic fully propagated network to be discovered. A list of switches that comprise the network is formed and the MAC address cache for each one of the switches is determined. For each pair of switches, from the MAC address caches the remaining switches that see the pair of switches are located. For each pair of switches the remaining switches are determined that see one of the pair of switches on a first port and the second one of the pair of switches on a second port. A list of insiders is formed for every pair of switches. It is determined whether the insider for each pair of switches is a graph edge and adjacent ones of the graph edges are determined. A symmetric adjacency matrix is formed from the graph edges to represent the topology of the data link network.

  12. Topological signal processing

    CERN Document Server

    Robinson, Michael

    2014-01-01

    Signal processing is the discipline of extracting information from collections of measurements. To be effective, the measurements must be organized and then filtered, detected, or transformed to expose the desired information.  Distortions caused by uncertainty, noise, and clutter degrade the performance of practical signal processing systems. In aggressively uncertain situations, the full truth about an underlying signal cannot be known.  This book develops the theory and practice of signal processing systems for these situations that extract useful, qualitative information using the mathematics of topology -- the study of spaces under continuous transformations.  Since the collection of continuous transformations is large and varied, tools which are topologically-motivated are automatically insensitive to substantial distortion. The target audience comprises practitioners as well as researchers, but the book may also be beneficial for graduate students.

  13. Topology in Molecular Biology

    CERN Document Server

    Monastyrsky, Michail Ilych

    2007-01-01

    The book presents a class of new results in molecular biology for which topological methods and ideas are important. These include: the large-scale conformation properties of DNA; computational methods (Monte Carlo) allowing the simulation of large-scale properties of DNA; the tangle model of DNA recombination and other applications of Knot theory; dynamics of supercoiled DNA and biocatalitic properties of DNA; the structure of proteins; and other very recent problems in molecular biology. The text also provides a short course of modern topology intended for the broad audience of biologists and physicists. The authors are renowned specialists in their fields and some of the new results presented here are documented for the first time in monographic form.

  14. Characterizing granular networks using topological metrics

    Science.gov (United States)

    Dijksman, Joshua A.; Kovalcinova, Lenka; Ren, Jie; Behringer, Robert P.; Kramar, Miroslav; Mischaikow, Konstantin; Kondic, Lou

    2018-04-01

    We carry out a direct comparison of experimental and numerical realizations of the exact same granular system as it undergoes shear jamming. We adjust the numerical methods used to optimally represent the experimental settings and outcomes up to microscopic contact force dynamics. Measures presented here range from microscopic through mesoscopic to systemwide characteristics of the system. Topological properties of the mesoscopic force networks provide a key link between microscales and macroscales. We report two main findings: (1) The number of particles in the packing that have at least two contacts is a good predictor for the mechanical state of the system, regardless of strain history and packing density. All measures explored in both experiments and numerics, including stress-tensor-derived measures and contact numbers depend in a universal manner on the fraction of nonrattler particles, fNR. (2) The force network topology also tends to show this universality, yet the shape of the master curve depends much more on the details of the numerical simulations. In particular we show that adding force noise to the numerical data set can significantly alter the topological features in the data. We conclude that both fNR and topological metrics are useful measures to consider when quantifying the state of a granular system.

  15. Topological confinement and superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Al-hassanieh, Dhaled A [Los Alamos National Laboratory; Batista, Cristian D [Los Alamos National Laboratory

    2008-01-01

    We derive a Kondo Lattice model with a correlated conduction band from a two-band Hubbard Hamiltonian. This mapping allows us to describe the emergence of a robust pairing mechanism in a model that only contains repulsive interactions. The mechanism is due to topological confinement and results from the interplay between antiferromagnetism and delocalization. By using Density-Matrix-Renormalization-Group (DMRG) we demonstrate that this mechanism leads to dominant superconducting correlations in aID-system.

  16. The topology of fullerenes

    DEFF Research Database (Denmark)

    Schwerdtfeger, Peter; Wirz, Lukas; Avery, James Emil

    2014-01-01

    Fullerenes are carbon molecules that form polyhedral cages. Their bond structures are exactly the planar cubic graphs that have only pentagon and hexagon faces. Strikingly, a number of chemical properties of a fullerene can be derived from its graph structure. A rich mathematics of cubic planar g....... In this paper, we present a general overview of recent topological and graph theoretical developments in fullerene research over the past two decades, describing both solved and open problems....

  17. Technologies for converter topologies

    Science.gov (United States)

    Zhou, Yan; Zhang, Haiyu

    2017-02-28

    In some embodiments of the disclosed inverter topologies, an inverter may include a full bridge LLC resonant converter, a first boost converter, and a second boost converter. In such embodiments, the first and second boost converters operate in an interleaved manner. In other disclosed embodiments, the inverter may include a half-bridge inverter circuit, a resonant circuit, a capacitor divider circuit, and a transformer.

  18. Operator algebras and topology

    International Nuclear Information System (INIS)

    Schick, T.

    2002-01-01

    These notes, based on three lectures on operator algebras and topology at the 'School on High Dimensional Manifold Theory' at the ICTP in Trieste, introduce a new set of tools to high dimensional manifold theory, namely techniques coming from the theory of operator algebras, in particular C*-algebras. These are extensively studied in their own right. We will focus on the basic definitions and properties, and on their relevance to the geometry and topology of manifolds. A central pillar of work in the theory of C*-algebras is the Baum-Connes conjecture. This is an isomorphism conjecture, as discussed in the talks of Luck, but with a certain special flavor. Nevertheless, it has important direct applications to the topology of manifolds, it implies e.g. the Novikov conjecture. In the first chapter, the Baum-Connes conjecture will be explained and put into our context. Another application of the Baum-Connes conjecture is to the positive scalar curvature question. This will be discussed by Stephan Stolz. It implies the so-called 'stable Gromov-Lawson-Rosenberg conjecture'. The unstable version of this conjecture said that, given a closed spin manifold M, a certain obstruction, living in a certain (topological) K-theory group, vanishes if and only M admits a Riemannian metric with positive scalar curvature. It turns out that this is wrong, and counterexamples will be presented in the second chapter. The third chapter introduces another set of invariants, also using operator algebra techniques, namely L 2 -cohomology, L 2 -Betti numbers and other L 2 -invariants. These invariants, their basic properties, and the central questions about them, are introduced in the third chapter. (author)

  19. Topological magnetoelectric pump in three dimensions

    Science.gov (United States)

    Fukui, Takahiro; Fujiwara, Takanori

    2017-11-01

    We study the topological pump for a lattice fermion model mainly in three spatial dimensions. We first calculate the U(1) current density for the Dirac model defined in continuous space-time to review the known results as well as to introduce some technical details convenient for the calculations of the lattice model. We next investigate the U(1) current density for a lattice fermion model, a variant of the Wilson-Dirac model. The model we introduce is defined on a lattice in space but in continuous time, which is suited for the study of the topological pump. For such a model, we derive the conserved U(1) current density and calculate it directly for the (1 +1 )-dimensional system as well as (3 +1 )-dimensional system in the limit of the small lattice constant. We find that the current includes a nontrivial lattice effect characterized by the Chern number, and therefore the pumped particle number is quantized by the topological reason. Finally, we study the topological temporal pump in 3 +1 dimensions by numerical calculations. We discuss the relationship between the second Chern number and the first Chern number, the bulk-edge correspondence, and the generalized Streda formula which enables us to compute the second Chern number using the spectral asymmetry.

  20. Exploring the Relationship between Health Insurance, Social Connectedness, and Subjective Social Status among Residents of O'ahu.

    Science.gov (United States)

    Thompson, Lisa M; Murray, Kate A; Jarvis, Sarah; Scarr, Ellen

    2016-11-01

    Relative position in a social hierarchy, or subjective social status, has been associated with indicators of socioeconomic status and may be influenced by social connectedness. The primary purpose of this study is to explore the relationship between health insurance status and subjective social status, using the MacArthur Scale of Subjective Social Status (SSS, community version), in the state of Hawai'i with its highly insured population. The secondary purpose is to examine other social determinants that influence social status, including social connectedness. Data were drawn from a convenience sample of 728 O'ahu residents in 2011-12. Social connectedness was measured if participants stated that family, friends, or community were strengths that could address their social and health concerns. In the final adjusted linear regression model, those with Medicaid/Quest insurance (β -0.40; P Social connectedness was highly valued, with over 30% of participants stating strong community and family ties as one of Hawai'i's greatest strengths. However, these strengths were not found to be statistically associated with subjective social status in our sample. Future studies should assess whether reinforcing social connectedness through public health and educational interventions improves subjective social status among low-income and ethnically diverse communities in Hawai'i.