On regular rotating black holes

The final publication is available at Springer via 10.1007/s10714-016-2166-7Different proposals for regular rotating black hole spacetimes have appeared recently in the literature. However, a rigorous analysis and proof of the regularity of this kind of spacetimes is still lacking. In this note we analyze rotating Kerr-like black hole spacetimes and find the necessary and sufficient conditions for the regularity of all their second order scalar invariants polynomial in the Riemann tensor. We also show that the regularity is linked to a violation of the weak energy conditions around the core of the rotating black hole.Peer ReviewedPostprint (author's final draft

Algorithms to Detect and Rectify Multiplicative and Ordinal Inconsistencies of Fuzzy Preference Relations

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.Consistency, multiplicative and ordinal, of fuzzy preference relations (FPRs) is investigated. The geometric consistency index (GCI) approximated thresholds are extended to measure the degree of consistency for an FPR. For inconsistent FPRs, two algorithms are devised (1) to find the multiplicative inconsistent elements, and (2) to detect the ordinal inconsistent elements. An integrated algorithm is proposed to improve simultaneously the ordinal and multiplicative consistencies. Some examples, comparative analysis, and simulation experiments are provided to demonstrate the effectiveness of the proposed methods

La evolución de las demandas indígenas sobre la tierra y las respuestas del Estado en Panamá

El artículo discute el desarrollo del modelo de comarcas indígenas en Panamá, pasando por figuras como el de resguardos indígenas, reserva indígena, la ultima tomada en préstamo a través de la experiencia norteamericana y el actual de Comarca, cuyas intenciones político administrativas tienen distintos significados, en un contexto de clientelismo y tolerancia, como valores de la cultura política. El artículo revisa igualmente el proceso de negociación de la propuesta de las comarcas entre 1977 y 1997, las tácticas de dilación realizadas por los sectores de poder económico y el propio estado, durante el gobierno de los militares (1968-1989). Finalmente se incluye el nuevo modelo de tierras colectivas para poblaciones pequeñas y dispersas. Palabras clave: reservas indígenas – comarcas - tierras colectivas – liberales – conservadores - clientelism

Notas sobre “A Cara Doente” de Isidore e Florencio Monje Gil

En esta reseña, el autor describe y analiza el contenido del libro “El rostro enfermo” resaltando su gran pertinencia como fuente para la historia de la medicina.In this review, the author describes and analyzes the contents of the book “The sick face” highlighting its great pertinence as a source for the history of medicine.Nesta revisão, o autor descreve e analisa o conteúdo do livro “O rosto doente”destacando sua grande relevância como fonte para a história da medicina

Multiobjective Evolutionary Induction of Subgroup Discovery Fuzzy Rules: A Case Study in Marketing

This paper presents a multiobjective genetic algorithm which obtains fuzzy rules for subgroup discovery in disjunctive normal form. This kind of fuzzy rules lets us represent knowledge about patterns of interest in an explanatory and understandable form which can be used by the expert. The evolutionary algorithm follows a multiobjective approach in order to optimize in a suitable way the different quality measures used in this kind of problems. Experimental evaluation of the algorithm, applying it to a market problem studied in the University of Mondragón (Spain), shows the validity of the proposal. The application of the proposal to this problem allows us to obtain novel and valuable knowledge for the experts.Spanish Ministry of Science and TechnologyFEDER TIC-2005-08386-C05-01 and TIC-2005- 08386-C05-03TIN2004-20061-E and TIN2004-21343-

Telas e espelhos

En estas páginas se presentan prosas, aforismos, reflexiones y microrrelatos que tratan sobre la muerte, el amor, la soledad, la pobreza, la injusticia, la enfermedad, la música, el cine, la literatura y la vida en la ciudad. | In these pages are presente prose, aphorisms, reflections and micro-narratives dealing with death, love, loneliness, poverty, injustice, disease, music, cinema, literatura and city life. | Nestas páginas são apresentadas prosa, aforismos, reflexões e micro-narrativas sobre a morte, o amor, a solidão, a pobreza, a injustiça, a doença, a música, o cinema, a literatura e a vida urbana