Search results for "points"
showing 10 items of 415 documents
Analysing moral issues in stakeholder relations
2001
The purpose of this paper is to develop a framework for analysing managers’ attitudes toward moral issues in stakeholder relations, and to operationalise the developed framework by defining statements to be used as empirical measures in survey research. The research question, how can moral issues in business be examined with the stakeholder approach, is answered by paying attention to both theoretical and empirical viewpoints. The paper reveals that by analysing a company’s stakeholder relations, we can discover the important moral issues in business. To validate the framework developed and the empirical measures which result, the development process is described in detail. The argument is …
Instability tests in cointegration relationships. An application to the term structure of interest rates
2002
Abstract This paper tries to review, from a practitioner's point of view, the recent strand of literature on cointegration tests allowing for structural changes or parameter instability. Thus, we apply several tests using as an example the expectations model of the term structure of interest rates. The results are consistent with the existence of cointegration between the long and the short run Spanish interest rates, with a vector (1,−1), as predicted by the theory. However, there is also evidence of structural instability, mainly at the beginning of 1994, that can be attributed to the financial changes that occurred in Spain as a result of its external commitments in the process of the Eu…
Re-examining the migration–trade link using province data: An application of the generalized propensity score
2013
Abstract The migration–trade link has been studied extensively since the mid nineties, finding a positive impact through different channels. Based on the generalized propensity score (GPS) methodology, we estimate a dose–response function, depicting a non-linear impact of immigration on exports using province data for Spain and Italy. For both countries the response of province exports to more immigrants from a given nationality is always positive, although varies with the level of immigrants. First we find neither minimum threshold nor exhaustion point in the effectiveness of the immigration networks on province exports. Second we find that the value of the potential bilateral exports reac…
The Influence of the Endogenous and Exogenous Factors on Credit Institutions’ Return on Equity
2015
Abstract The research’s purpose is to study the credit institutions’ performance, from the shareholders’ point of view, through return on equity (ROE). It aims to identify a dependency relationship between return on equity (ROE) and endogenous factors (the growth rate of credit portfolio, the growth rate provisions, the solvency ratio), on the one hand and, on the other hand between ROE and the exogenous ones (GDP and inflation rate). The research was done over an horizon of 10 years (2004-2013) on the evolution of the return on equity indicator of two credit institutions listed on Bucharest Stock Exchange (Carpathian Commercial Bank SA and Banca Transilvania SA), highlights their vulnerabi…
Uncertainties in polarimetric 3D reconstructions of coronal mass ejections
2015
P.P. acknowledges STFC for financial support. Date of Acceptance: 21/01/2015 Aims. The aim of this work is to quantify the uncertainties in the three-dimensional (3D) reconstruction of the location of coronal mass ejections (CMEs) obtained with the so-called polarization ratio technique. The method takes advantage of the different distributions along the line of sight of total (tB) and polarized (pB) brightnesses emitted by Thomson scattering to estimate the average location of the emitting plasma. This is particularly important to correctly identify of CME propagation angles and unprojected velocities, thus allowing better capabilities for space weather forecastings. Methods. To this end, …
Above-bandgap ordinary optical properties of GaSe single crystal
2009
We report above-bandgap ordinary optical properties of ε-phase GaSe single crystal. Reference-quality pseudodielectric function 〈ε(E)〉 = 〈ε1(E)〉+i〈ε2(E)〉 and pseudorefractive index 〈N(E)〉 = 〈n(E)〉+i〈k(E)〉 spectra were measured by spectroscopic ellipsometry from 0.73 to 6.45 eV at room temperature for the light polarization perpendicular to the optic axis (math⊥math). The 〈ε〉 spectrum exhibited several interband-transition critical-point structures. Analysis of second-energy derivatives calculated numerically from the measured data yielded the critical-point energy values. Carmen.Martinez-Tomas@uv.es
La calidad periodística en España según la percepción de los periodistas
2015
Este artículo expone los resultados de una investigación sobre la percepción que tienen los periodistas españoles de la calidad periodística, teniendo en cuenta el contexto económico, tecnológico, empresarial, laboral y profesional. Los resultados de una encuesta, en la que participan 363 periodistas españoles con al menos tres años de experiencia en diferentes medios, ponen de manifiesto carencias relativas tanto a la relevancia y diversidad de los temas abordados como al acceso a las fuentes o el tratamiento y verificación de los datos, así como a las condiciones laborales o a los retos derivados de la adaptación a las nuevas tecnologías y a las imposiciones de la acuciante inmediatez. Ju…
Menores que Maltratan a sus Progenitores: definición Integral y su Ciclo de Violencia
2017
Dentro del maltrato familiar, la violencia filio-parental es una línea de investigación en el ámbito de la psicología y la pedagogía de cierta relevancia actual. En la primera parte del artículo se pretende analizar este fenómeno, desde las perspectivas psicoeducativa y jurídica, para aportar una definición integral que abarque diferentes perspectivas de la violencia filio-parental, porque la intervención y prevención de ésta debe partir del conocimiento acerca de las causas y mecanismos que intervienen en el complejo ámbito de ésta violencia intrafamiliar, así como de las relaciones e interacciones que se establecen entre hijos, hijas y progenitores. Por ello, la segunda parte del artículo…
Multiple solutions for quasilinear elliptic problems via critical points in open sublevels and truncation principles
2012
Abstract We study a quasilinear elliptic problem depending on a parameter λ of the form − Δ p u = λ f ( u ) in Ω , u = 0 on ∂ Ω . We present a novel variational approach that allows us to obtain multiplicity, regularity and a priori estimate of solutions by assuming certain growth and sign conditions on f prescribed only near zero. More precisely, we describe an interval of parameters λ for which the problem under consideration admits at least three nontrivial solutions: two extremal constant-sign solutions and one sign-changing solution. Our approach is based on an abstract localization principle of critical points of functionals of the form E = Φ − λ Ψ on open sublevels Φ − 1 ( ] − ∞ , …
Distributed and proximity-constrained C-means for discrete coverage control
2018
In this paper we present a novel distributed coverage control framework for a network of mobile agents, in charge of covering a finite set of points of interest (PoI), such as people in danger, geographically dispersed equipment or environmental landmarks. The proposed algorithm is inspired by C-Means, an unsupervised learning algorithm originally proposed for non-exclusive clustering and for identification of cluster centroids from a set of observations. To cope with the agents' limited sensing range and avoid infeasible coverage solutions, traditional C-Means needs to be enhanced with proximity constraints, ensuring that each agent takes into account only neighboring PoIs. The proposed co…