Efficiently Storing Well-Composed Polyhedral Complexes Computed Over 3D Binary Images

A 3D binary image I can be naturally represented by a combinatorial-algebraic structure called cubical complex and denoted by Q(I ), whose basic building blocks are vertices, edges, square faces and cubes. In Gonzalez-Diaz et al. (Discret Appl Math 183:59–77, 2015), we presented a method to “locally repair” Q(I ) to obtain a polyhedral complex P(I ) (whose basic building blocks are vertices, edges, specific polygons and polyhedra), homotopy equivalent to Q(I ), satisfying that its boundary surface is a 2D manifold. P(I ) is called a well-composed polyhedral complex over the picture I . Besides, we developed a new codification system for P(I ), encoding geometric information of the cells of P(I ) under the form of a 3D grayscale image, and the boundary face relations of the cells of P(I ) under the form of a set of structuring elements. In this paper, we build upon (Gonzalez-Diaz et al. 2015) and prove that, to retrieve topological and geometric information of P(I ), it is enough to store just one 3D point per polyhedron and hence neither grayscale image nor set of structuring elements are needed. From this “minimal” codification of P(I ), we finally present a method to compute the 2-cells in the boundary surface of P(I ).Ministerio de Economía y Competitividad MTM2015-67072-

Encoding Specific 3D Polyhedral Complexes Using 3D Binary Images

We build upon the work developed in [4] in which we presented a method to “locally repair” the cubical complex Q(I) associated to a 3D binary image I, to obtain a “well-composed” polyhedral complex P(I), homotopy equivalent to Q(I). There, we developed a new codification system for P(I), called ExtendedCubeMap (ECM) representation, that encodes: (1) the (geometric) information of the cells of P(I) (i.e., which cells are presented and where), under the form of a 3D grayscale image gP ; (2) the boundary face relations between the cells of P(I), under the form of a set BP of structuring elements. In this paper, we simplify ECM representations, proving that geometric and topological information of cells can be encoded using just a 3D binary image, without the need of using colors or sets of structuring elements. We also outline a possible application in which well-composed polyhedral complexes can be useful.Junta de Andalucía FQM-369Ministerio de Economía y Competitividad MTM2012-32706Ministerio de Economía y Competitividad MTM2015-67072-

Spatiotemporal Barcodes for Image Sequence Analysis

Taking as input a time-varying sequence of two-dimensional (2D) binary images, we develop an algorithm for computing a spatiotemporal 0–barcode encoding lifetime of connected components on the image sequence over time. This information may not coincide with the one provided by the 0–barcode encoding the 0–persistent homology, since the latter does not respect the principle that it is not possible to move backwards in time. A cell complex K is computed from the given sequence, being the cells of K classified as spatial or temporal depending on whether they connect two consecutive frames or not. A spatiotemporal path is defined as a sequence of edges of K forming a path such that two edges of the path cannot connect the same two consecutive frames. In our algorithm, for each vertex v ∈ K, a spatiotemporal path from v to the “oldest” spatiotemporally-connected vertex is computed and the corresponding spatiotemporal 0–bar is added to the spatiotemporal 0–barcode.Junta de Andalucía FQM-369Ministerio de Economía y Competitividad MTM2012-3270

Working Conditions After an Economic Crisis in Spain: “No Calm After the Storm

Working Conditions After an Economic Crisis in Spain: “No Calm After the Storm”. Working conditions during the economic crisis of the first decade of the 21st century have been the object of extensive research. This study delves into the main risks facing workers subsequent to the recession and economic crisis of 2008-2014 and prior to the unsettling times provoked by the COVID-19 pandemic and the war in Ukraine. The choice of Spain as the study area stems from the deep effects of the economic crisis on this country and the fragmentation of its trade unions. Spain is likewise relevant as its authorities adopted two opposite strategies (respectively austerity followed by expansive investment) to cope and counter these problems over time. This qualitative study comprises in-depth interviews with 45 experts from various sectors of business. The findings suggest that factors such as persistent job insecurity and work overload profoundly affect the social environment and relationships of employees both at work and in the family generating individual coping strategies that weaken the role of trade unions.Research project B-SEJ-418-UGR20FEDER/Junta de Andalucía-Consejería de Transformación Económica, Industria, Conocimiento y Universidade

Subjective and Occupational Well-Being in a Sample of Mexican Workers

This article examines the well-being of workers, observing that subjective and occupational well being are interrelated but independent dimensions and analyzing their interaction with their modulating factors. Specifically, the relationships between well-being and personal value structures are examined, hypothesizing that congruence between personal and socially predominant values improves the well-being of workers. The influence of various occupational and personal factors is also analyzed. We studied 209 workers of a multinational company in Mexico using different standardized questionnaires. The results demonstrate that subjective and occupational well-being are related but independent variables influenced by differentiated variables. Specifically, the occupational well-being of workers is influenced by the nature of their work, whereas subjective well-being is affected by their social values and level of education. We present a model for the interaction of these variables and their consequences with the intention of the worker to stay with or leave the company. We discuss some practical issues raised by the study and make recommendations for future

The future of an illusion: Paradoxes of Corporate Social Responsibility

Purpose – The purpose of this paper is to explore the psychological strategies as well as the rhetorical and discursive arguments developed in organizations and by individuals when they have to cope with the paradoxes and changes related to CSR. Design/methodology/approach – This study uses the perspective of the paradox as an analytical framework to parse strategies developed in organizations as they cope with tensions and changes related to CSR. The authors conducted 50 semi-structured interviews with stakeholders and the authors performed a qualitative analysis with the information compiled. Findings – The main strategies for dealing with CSR paradoxes and changes consist of developing perceptual and motivational biases as well as explicative heuristic ones through which, from a discursive perspective, a coherent and conciliatory framework is presented with rhetoric that play a fundamental role in justifying CSR as a present hope over a future illusion regardless of the past reality. Originality/value – The lesson to be drawn from the exploration is the following: managers and CSR officers need to leave behind fear, anxiety and defensive attitudes and accept the paradox by re-contextualizing the tension as a stimulus for conscious and reflexive confrontation with emotional equilibrium, this being defiantly motivating as a sensemaker. In this way, the approach to the present inconsistencies in CSR should not involve a dismissal of conflictive situations but rather the development of the capacity to transcend the tension emanating from them and to learn to manage organizations from this paradoxical reality

Una aproximación a los verbos de sentimiento en griego y en latín: su traducción al español

Tesina realizada en el marco de la Especialización / Maestría de gramática del español de ANEP - UdelaREl objeto de la investigación se enmarca en el ámbito de la sintaxis de la lengua griega y de la latina. Específicamente, este trabajo aborda el análisis de un tipo de verbos denominados tradicionalmente impersonales de sentimiento. Asimismo, para el estudio se tendrán en cuenta algunas versiones en español, por lo que se deben incluir aspectos generales de la teoría de la traducción. En este sentido, ante los distintos enfoques con que se puede considerar la traducción: literal, semántica, libre, comunicativa (Newmark, 1988), el énfasis, en este caso, está en las distintas formas gramaticales que adopta la lengua meta para la transmisión del sentido que propone la lengua origen. El fundamento para poner atención sobre estos aspectos radica en que las construcciones impersonales con este tipo de verbos no tienen un correlato perfecto en español, por tanto, no resulta posible una traducción literal basada en los mismos contenidos gramaticales. El traductor debe trasformar la estructura impersonal en una personal puesto que, de otro modo, la oración en español resulta agramatical. Para ello, cuenta con diferentes mecanismos que permitirán la obtención de traducciones relativamente sinónimas. Este es el punto más importante en el estudio luego de la descripción de la sintaxis que despliegan estos verbos en griego y en latí

SEBASTIÁN DE COVARRUBIAS, UN LECTOR CRÍTICO DE OVIDIO

This article presents a review of references to the Latin poet  recorded in Tesoro de la lengua castellana o española, published in 1611. It is known that the man of the Spanish Golden Age recognized the foundations of his culture in the Greco-Latin world, thus is not surprising Covarrubias' predilection by this author. However, not all the allusions are quotes or references as literary source, but in some cases the lexicographer dissents with the poet and brings a personal vision. The proposal requires the re-reading of several of the entries of the Tesoro and the analysis of the perspective that Covarrubias gives to the Ovidian  references.En este artículo se presenta una revisión de las referencias al poeta latino consignadas en el Tesoro de la lengua castellana o española, publicado en 1611. Se sabe que el hombre del Siglo de Oro reconocía los fundamentos de su cultura en el mundo grecolatino, por lo que no es de extrañar la predilección de Covarrubias por este autor. Sin embargo, no todas las alusiones suponen citas de autoridad o el recurso a una fuente literaria, sino que, en algunos casos el lexicógrafo disiente con el poeta y aporta una visión personal.La propuesta requiere la relectura de varias de las entradas del Tesoro y el análisis de la perspectiva que Covarrubias les brinda a las referencias ovidianas