Jose Ramos

Adaptive optics are techniques used for processing the spatial resolution of astronomical images taken from large ground-based telescopes. In this work, computational results are presented for a modified curvature sensor, the tomographic pupil image wavefront sensor, which measures the turbulence of the atmosphere, expressed in terms of an expansion over Zernike polynomials. Convolutional neural networks are presented as an alternative to the TPI-WFS reconstruction. This technique is a machine learning model of the family of artificial neural networks, which are widely known for its performance as modeling and prediction technique in complex systems. Results obtained from the reconstruction of the networks are compared with the TPI-WFS reconstruction by estimating errors and optical measurements. The reconstructed wavefronts from both techniques are compared for wavefronts of 153 Zernike modes. For this case, a detailed comparison and grid search to find the most suitable neural network is performed, searching between multi-layer perceptron, CNN and recurrent networks topologies. In general, the best network was a CNN trained for TPI-WFS reconstruction, achieving better performance than the reconstruction software from TPI-WFS in most of the turbulent profiles, but the most significant improvements were found for higher turbulent profiles that have the lowest r0 values.

To achieve their goals, organizations for individuals with intellectual disability have to stimulate high-quality relationships between professionals and family members. Therefore, achieving professionals’ trust in family members has become a challenge. One relevant factor in explaining professional’s trust in families is the degree to which family members use the “problem-solving” conflict management strategy in their disputes–disagreements with professionals. It is reasonable to argue that when family members use problem-solving conflict management, professionals’ trust increases. Professionals’ trust, in turn, stimulates the use of problem-solving strategies by family members. However, it is also plausible that professionals are the initiators of this positive spiral. To examine this relationship between problem solving and trust over time, we conducted a longitudinal survey study in which 329 professionals reported on these two constructs three times. Using structural equation modeling, we compared four nested models: stability, causality, reversed causation, and reciprocal. The results of the χ2 difference tests, regarding the comparison of the models, showed that the reciprocal model was significantly superior to the alternative proposals. Our findings supported a complex view of the relationships between problem-solving conflict management and trust, based on dynamic reciprocal relationships over time.

La siempre fascínate escritura rulfiana continúa dialogando con el mundo. El así conocido “escritor de las letras mexicanas”, nos sigue ofreciendo un mar de posibilidades de acercamiento a otras áreas humanísticas entre las cuáles incluimos a la filosofía. Coincidentes en la época y en la geografía mexicana, Juan Rulfo y María Zambrano se encontraron en 1939. Exponentes ejemplares y creadores de nuevos caminos en la escritura literaria y filosófica, los exponemos como paralelos a través de dos piezas claves de sus obras: Pedro Páramo y Los sueños y el tiempo. La antropología zambraniana viene propuesta como uno de estos senderos creativos y creadores de la búsqueda del propio ser y del sentido mismo del existir. Dicho pronunciamiento antropológico lo exponemos como perspectiva de lectura del viaje no sólo de Juan preciado, ansioso buscador de su padre, sino de todos los lectores de Rulfo que hemos tejido con sus letras —extractoras de sueños y productoras de anhelos— la frágil cuerda que sostiene la aventura del descubrir nuestro lugar en el oscuro pozo del mundo. Realismo mágico y Razón poética en armonía propositiva que revela el origen de ambos proveniente de la misma semilla del ser. Rulfo y Zambrano nos enseñan que hay encuentros más profundos y reales que aquellos sólo históricos.

The essay Tracing the Traces of our Face concerns the relationship between the drawing, the self-portrait and the image in the mirror. This is accomplished following some ideas exposed in Bachelard's The wather an d the dreams where the mirroring on still water is put up into debate. The present paper tries to explore a concept of self-portrait departing of Bachelard’s notion of naturalization of the image. In this way it is set up the idea that the drawing self-portrait can be an action that gives back natural presence to identity, which was lost in a too much artificial and fixed world. So, drawing dissolves the image with such a naturality as if it was deep lake water.

Departing from the work of Georg Simmel on Rembrandt, we try to characterize self-portrait as a moment of inner confrontation and of inner inquiry on our inner self and individuality. All self-portraits are pervaded by the ephemeral character of life, where death is constantly present. The self-portrait is born from the drawing and the drawing develops it in a continuity where the past juts out in the present. The human face is the sum of a duration that moulds its traits, its expression and its variation in a tension that brings the past to a present that is now remade. Thus, the self-portrait, more than the portrait, enables the possibility to transmit what the subject has of unique as an individual. In this sense, the self-portrait represents the knowledge of an individuality felt in the process of life, individuality withdrawn from the stream of life and in the unity of its existence.