At the beginning of the 18th century, Berkeley believed an anomaly pointed out by Isaac Barrow could be regarded as important evidence against the optical theories that had been established and standardized thanks to the works of Kepler and Newton. In this article, we want to show that Berkeley’s treatment of the Barrovian Case does not falsify these theories. We will contend that the strategy used by Berkeley to resolve the anomaly by alluding to a change of convention is a (...) strategy that the classical theorist could use as well. In other words, the classical theorist could also appeal to a change of convention to deal with the problem. (shrink)

A estrutura das antinomias lógicas, redescobertas e reformuladas por Frege e Russell no começo do século XX, consiste num movimento circular que é, ao mesmo tempo, autoflexivo e negativo. Surge, aí, um perpétuo oscilar entre o Sim e o Não, em certos casos, entre verdade e falsidade. Os Lógicos resolvem o problema pela distinção de tipos ou níveis linguagem. Alguns filósofos - Kulenkampff, Kesselring, Wandschneider – pensam ter aí encontrado o mecanismo central que move a Dialética. Procura-se aqui mostrar que (...) estão, pelo menos em grande parte, equivocados. Dialética é algo bem mais simples e mais amplo. (shrink)

Johannes Kepler dedicated much of his work to discover a law for the refraction of light. Unfortunately, he formulated an incorrect law. Nevertheless, it was useful for anticipating the behavior of light in some specific conditions. Some believe that Kepler did not have the elements to formulate the law that was later accepted by the scientific community, that is, the Snell–Descartes law. However, in this paper, we propose a model that agrees with Kepler’s heuristics and that is also successful in (...) anticipating the behavior of light when it passes through a surface that separates two media with different optical densities. This model adopts strategies that were recommended by Kepler in two types of analogies. The obstacles that led to the failure of the two types of analogies are presented in the article, and we argue that the model proposed here could overcome these specific obstacles. Finally, we show how the proposed model could be articulated with Kepler’s metaphysics of light. (shrink)

The existence of a Richter–Peleg multi-utility representation of a preorder by means of upper semicontinuous or continuous functions is discussed in connection with the existence of a Richter–Peleg utility representation. We give several applications that include the analysis of countable Richter–Peleg multi-utility representations.

In this paper we study collective identity functions that deal with formation of clubs. Usually the choice offered to individuals is to cast a vote in favor of qualification or not, and the final outcome is qualification or non-qualification. In this context we show that independent collective identity functions are naturally characterized by voting rules, and in particular, consent rules can be represented by one single collection of weighted majorities. In addition, we consider the extended model where voters are allowed (...) to abstain and we distinguish between disqualification and a neutral outcome. We show that this environment allows agents to act in different capacities that cannot be distinguished in the original formulation of the problem. (shrink)

La tensión (porosa, múltiple y siempre inacabada) entre la memoria y el olvido, está mediada por las acciones. humanas que destacan ciertos hechos del pasado reciente, con objetivos políticos de cara a nuevas coyunturas. En ese universo, entran en disputa diferentes memorias, que ponen en juego subjetividades, emociones, formas, intereses, narrativas, condiciones sociales y relaciones de poder. La tesis reseñada se ubica en un rincón específico de ese mundo de luchas memoriales. En ella se aborda la lucha de un colectivo (...) de Madres colombianas: Las Madres de ‘Falsos Positivos’ (MAFAPO), cuyos hijos fueron asesinados en el marco de una política del Ejército Nacional de Colombia comúnmente conocida bajo el nombre de ‘falsos positivos’. (shrink)

Dialéticos e analíticos não se entendemporque falam línguas com sintaxes parcialmentediferentes. Não obstante esta diferença, hátrês princípios básicos que regem e estruturamtanto a lógica dialética como a lógica analítica: osprincípios de identidade, de diferença e de coerênciauniversal. Os mesmos três princípios regemtambém a natureza em seu processo de evoluçãoe constituem o indivíduo e a espécie,as mutações por acaso ea seleção natural.

El presente trabajo ofrece una interpretación hermenéutica del espectáculo Limbo, de la artista mexicana Gabriela Muñoz, también conocida como “Chula the clown”, a partir de los conceptos desierto y exilio, presentes en este ejercicio escénico, así como en el pensamiento de María Zambrano, donde se muestran como un problema filosófico, y en la obra del investigador Ignacio Izuzquiza. Exilio y desierto aparecen también en Esperando a Godot de Samuel Beckett, obra que se revela como influencia del trabajo de Muñoz y (...) con la que comparte algunos signos poéticos. El texto, asimismo, retoma los apuntes de la investigadora Melissa Lima Caminha, principalmente la noción de deconstrucción del clown femenino moderno y la categoría de monstruosidad para hablar de quienes han sido expulsados o expulsadas del grupo social por ser considerados diferentes y con lo cual viven, precisamente, en los linderos del exilio. En Muñoz, como sucede con la tradición clown, esta figura cómica se muestra como símbolo de lo excluido, lo deforme, lo anormal e, incluso, de lo despreciable. A partir de estas claves, la artista muestra el limbo como un estado emocional donde se diluyen las fronteras del tiempo y el espacio, en un ambiente que se mueve entre la desolación y la comicidad. (shrink)

En el artículo se examina la controversia entre extramisionismo e intramisionismo a propósito de la percepción visual. Se defiende que la evaluación del cierre de la controversia depende del explanandum que rastrea el filósofo/historiador en la reconstrucción que persigue. Si enfatizamos en los mecanismos causales, la controversia se cerró en favor del intramisionismo. Si enfatizamos en aspectos asociados con la intencionalidad o con la forma como ciertas afecciones mentales refieren a objetos externos, la controversia conduce a una conciliación entre intramisionismo (...) causal y extramisionismo mental. Finalmente, si ponemos en duda la necesidad de una distinción entre interno/externo, la controversia se disuelve por carecer de sentido. (shrink)

Bioethics, Volume 35, Issue 7, Page 646-651, September 2021.

Aberrations introduced by the atmospheric turbulence in large telescopes are compensated using adaptive optics systems, where the use of deformable mirrors and multiple sensors relies on complex control systems. Recently, the development of larger scales of telescopes as the E-ELT or TMT has created a computational challenge due to the increasing complexity of the new adaptive optics systems. The Complex Atmospheric Reconstructor based on Machine Learning is an algorithm based on artificial neural networks, designed to compensate the atmospheric turbulence. During (...) recent years, the use of GPUs has been proved to be a great solution to speed up the learning process of neural networks, and different frameworks have been created to ease their development. The implementation of CARMEN in different Multi-GPU frameworks is presented in this paper, along with its development in a language originally developed for GPU, like CUDA. This implementation offers the best response for all the presented cases, although its advantage of using more than one GPU occurs only in large networks. (shrink)