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Abstraction, cognition and communication, on Luis J. Prieto as reader of Éric Buyssens
E. Israel Chávez Barreto 고려대학교 응용문화연구소 2020 에피스테메 Vol.0 No.23
The aim of this paper is to analyze Prieto’s reading of Éric Buyssens’ seminal work on semiology, Les langages et le discours, Essai de linguistique fonctionnelle dans le cadre de la sémiologie. The analysis is made from two perspectives: a historical perspective and a theoretical perspective. The historical perspective presents the context, regarding Prieto’s academic work, within which Prieto read Buyssens, for this we take into consideration the papers Prieto published in second half of the 50’s and the research reports from 1962 to 1965 that are held in the Prieto archives at the Universidad Nacional de Córdoba. The theoretical perspective is mainly grounded on the hypothesis that Prieto made a “cognitive reading” of Buyssens’ claims. The analysis is divided according to three thematic areas: (a) the treatment of “abstraction” in Buyssens and in Prieto, (b) the problem of the delimitation of functional units as a cognitive problem, and (c) the distinction between communication versus indication.
Using a feed forward ANN to model the inelastic behaviour of confined sandwich panels
María E. Marante,Wilmer J. Barreto,Ricardo A. Picón 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.71 No.5
The analysis and design of complex structures like sandwich-panel elements are difficult; the use of finite element method for the analysis is complicated and time consuming when non-linear effects are considered. On the other hand, artificial neural network (ANN) models can capture the non-linear effects and its application requires lesser computational demand. Two ANN models were trained, tested and validated to compute the force for a given displacement of a sandwich-type roof element; 2555 force and element deformation pairs were used for training the ANN models. For the models trained without considering the damping effect, there were two values in the input layer: maximum displacement and current displacement, and for the model considering damping, displacement from the previous step was used as an additional input. Totally, 400 ANN models were trained. Results show that there is a good agreement between the experimental and simulated data, and the models showed a good performance with a mean square error value of 4548.85. Both the ANN models could simulate the inelastic behaviour, loss of rigidity, and evolution of permanent displacements. The models could also interpolate and extrapolate, which enables them to be used as an analysis and design tool for such complex elements.
G.D. Webler,M.J.M. Zapata,L.C. Agra,E. Barreto,A.O.S. Silva,J.M. Hickmann,E.J.S. Fonseca 한국물리학회 2014 Current Applied Physics Vol.14 No.6
Calcium phosphate compounds have been widely studied for biomedical applications because of their chemical and structural similarity to the mineral phase constituting bone and teeth. In this work, biphasic calcium phosphate ceramics (HAP/b-TCP), with tunable phase composition ratio, were synthesized by a solid state reaction process. The effect of varying the heat treatment temperature (700, 800, 900, 1000, and 1100 C) on the formation of the ceramic materials and their related cytotoxicity were examined. The phase composition and morphology of the prepared ceramic powders were characterized by X-ray diffraction and scanning electron microscopy, and the functional groups were analyzed using Fourier transform infrared spectroscopy and Raman spectroscopy. Cell culture experiments, using murine macrophages, showed that the synthesized HAP/b-TCP materials did not exhibit cytotoxicity regardless of the doses assayed or the differences in composition ratio of HAP/b-TCP, suggesting the potential of HAP/ b-TCP for biological applications.