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  • Miniatura
    Item type: Artículo ,
    Beyond the Spell: A Dynamic Logic Analysis of Misdirection
    (Elsevier Science, 2026-08)
    Icard, Benjamin
    ;
    Fervari, Raul Alberto
    Misdirection can be defined as the intentional action of causing some misrep resentation in an agent, or in a group of agents. Such misrepresentations may result from verbal actions, as in linguistic deception, or from visual actions, as in visual misdirection. Examples of visual misdirection abound (e.g. in nature, in the military), with magic tricks providing a vivid illustration. So far, various types of verbal misdirection have been investigated from a formal perspective(e.g. lying, bluffing) but little attention has been paid to the particular case of visual misdirection. In this paper, we introduce a dynamic epistemic logic to represent not only verbal misdirection on agents? beliefs but also visual misdirection on agents? observations. We illustrate the dynamics of the logic by modelling a classic magic trick known as the French Drop. We also provide a sound and complete axiom system for the logic, and discuss the expressivity and scope of the setting.
  • Miniatura
    Item type: Evento ,
    What is the goal of the wine chromatic characterization in a CIE color space?
    (International Colour Association, 2019)
    Martín, Andrés
    ;
    Silva, Bárbara
    ;
    Lasagno, Cecilia Marta
    ;
    Novello, Víctor
    ;
    Gor, Sergio Ricardo
    There is a vast amount of specialized literature about color, and on the other hand, a vast amount of specialized literature about how to characterize wine color. The proposed methods to asses wine color were evolved: from Sudraud in the late 1950s through Glories in the mid-1980s to the nowadays CIE tristimulus based values. This evolution rise the question about the objective of a chromatic characterization of wines which in turns challenges the supposed advantages of evaluating the color of wine through a CIE color space. We present a bibliographic review in order to analyze the ideas behind wine color characterization. One finding of this review is the fact that wine color becomes an ambiguous concept that oscillates between a naive definition of color and a chemical one.
  • Miniatura
    Item type: Evento ,
    Pupil role in color brightness perception in relation with "the dress" explanations
    (International Colour Association, 2019)
    Martín, Andrés
    ;
    Contino, Juan Ignacio
    It is well known that pupil size is determined mainly by the illumination level and that the entire pupil's reflex mechanism is controlled by the sympathetic and parasympathetic nerves, in an almost exclusively bottom up fashion. On the other hand, it is a less know issue how the pupil size affects perception, and in particular, color perception. Recent studies, triggered since "the dress" image was scientifically considered by the vision community, suggest that pupil size plays an important role in the perception of brightness of colored patches. Our research suggest the existence of two groups of observers: those who have a "big pupil" and perceive colors in a dimmer way and those who have a "small pupil" and perceive colors in a brighter way. Further analysis is needed to grasp these results in a family theoretical framework.
  • Miniatura
    Item type: Artículo ,
    Analysis of the trends in in vitro studies of the Latin America-Comet assay (LA-COMET) Group
    (Elsevier Science, 2026-05)
    Valverde, Mahara
    ;
    Flores Márquez, Ana Rosa
    ;
    Gómez Arroyo, Sandra
    ;
    Lafon Hughes, Laura
    ;
    León Mejía, Grethel
    On a global scale, the versatility and high sensitivity of the comet assay have promoted its use from different perspectives to determine genotoxic damage. With this in mind and through the formation of a Latin American group denominated "LA-COMET", a review of the manuscripts published by the group is proposed from the perspective of in vitro studies, using the alkaline comet assay. To facilitate the analysis of the 81 manuscripts published between 1996 and 2022, they were classified into four categories based on the type of agents evaluated by the assay: 1) environmental pollutants; 2) pesticides and their mixtures; 3) radiation and drugs; and 4) natural products. The objective of this review was to describe the strengths and versatility of in vitro studies reflected bycellular models, putative DNA damaging agents, and the use of specific enzymes to identify particular DNA lesions. In addition, an in vitro QS (quality score) was established, taking into consideration the data provided in the publications regarding the cellular model, the method of disaggregation and the cell suspension obtention. Other considerations included the clarity of the description of the treatments, the use of negative and positive reference controls, and the use of specific enzymes and/or the functional evaluation of DNA repair. The analysis demonstrated that the publications of the LA-COMET group of in vitro models exhibited a high score with respect to the important parameters established in the OECD agreements.
  • Miniatura
    Item type: Artículo ,
    Evaluación de la conductividad térmica de placas de residuos textiles y almidón de papa con una experimental caja caliente
    (Asociación Argentina de Energía Solar, 2026-04)
    Atanasoska, Kristina
    La conductividad térmica es una propiedad clave en el desarrollo de materiales de construcción para una arquitectura energéticamente eficiente. En este estudio se presenta el diseño y metodología de calibración de una caja caliente de bajo costo, empleada para medir la conductividad térmica de placas elaboradas con residuos textiles y almidón de papa. La calibración del dispositivo se realizó mediante tres ecuaciones de regresión lineal, basadas en materiales de referencia con densidades aparentes entre 250 y 800 kg/m³. Los resultados obtenidos mostraron errores cercanos al 10 % en comparación con los valores declarados de dichos materiales, lo que valida la precisión del instrumento en contextos de investigación. Aunque se requieren más pruebas para densidades fuera del rango de calibración, la caja caliente demostró ser una herramienta práctica y confiable para el análisis térmico de materiales experimentales. Las placas experimentales evaluadas presentaron conductividades térmicas entre 0,065 y 0,24 W/m·K, en función de su densidad. De las cinco placas ensayadas, tres mostraron valores dentro de un rango potencialmente adecuado para su uso como material aislante.