Maria Adelaide Amaral ou a Crise da Classe Média Brasileira

Maria Adelaide Amaral ou a Crise da Classe Média Brasileir

Distinguishing noise from chaos: objective versus subjective criteria using Horizontal Visibility Graph

A recently proposed methodology called the Horizontal Visibility Graph (HVG) [Luque {\it et al.}, Phys. Rev. E., 80, 046103 (2009)] that constitutes a geometrical simplification of the well known Visibility Graph algorithm [Lacasa {\it et al.\/}, Proc. Natl. Sci. U.S.A. 105, 4972 (2008)], has been used to study the distinction between deterministic and stochastic components in time series [L. Lacasa and R. Toral, Phys. Rev. E., 82, 036120 (2010)]. Specifically, the authors propose that the node degree distribution of these processes follows an exponential functional of the form $P(\kappa)\sim \exp(-\lambda~\kappa)$, in which $\kappa$ is the node degree and $\lambda$ is a positive parameter able to distinguish between deterministic (chaotic) and stochastic (uncorrelated and correlated) dynamics. In this work, we investigate the characteristics of the node degree distributions constructed by using HVG, for time series corresponding to $28$ chaotic maps and $3$ different stochastic processes. We thoroughly study the methodology proposed by Lacasa and Toral finding several cases for which their hypothesis is not valid. We propose a methodology that uses the HVG together with Information Theory quantifiers. An extensive and careful analysis of the node degree distributions obtained by applying HVG allow us to conclude that the Fisher-Shannon information plane is a remarkable tool able to graphically represent the different nature, deterministic or stochastic, of the systems under study.Comment: Submitted to PLOS On

Design, processing and testing of LSI arrays, hybrid microelectronics task

Mathematical cost models previously developed for hybrid microelectronic subsystems were refined and expanded. Rework terms related to substrate fabrication, nonrecurring developmental and manufacturing operations, and prototype production are included. Sample computer programs were written to demonstrate hybrid microelectric applications of these cost models. Computer programs were generated to calculate and analyze values for the total microelectronics costs. Large scale integrated (LST) chips utilizing tape chip carrier technology were studied. The feasibility of interconnecting arrays of LSU chips utilizing tape chip carrier and semiautomatic wire bonding technology was demonstrated

Biological evaluation and molecular modelling of didanosine derivatives

Five carbonate derivatives of 50-O-20,30-dideoxyinosine (DDI, 1) have been synthesized by combination with aliphatic alcohols, with their in vitro anti-HIV activity and cytotoxicity being evaluated afterward in human peripheral blood mononuclear cells (PBMCs). One particular compound, namely DDI-Penta, exhibited an outstanding performance because it was found to have both a higher inhibitory potency and a lower cytotoxicity than the lead compound, resulting in a 100 enhancement in its selectivity index. In order to further study this phenomenon, the ability of these derivatives to bind to the cytoplasmatic nucleotidase (ncN-II) was studied by in silico methods. Also, the higher calculated lipophilicity of the synthesized compounds was proposed to improve their permeability through the cell membrane since said lipophilicity would allow a higher concentration of the corresponding prodrug inside the infected cell. Overall, a combination of an optimal lipophilicity and the ability of DDI-Penta to bind to ncN-II is suggested due to the higher potency and lower cytotoxicity observed for this compound. Based on the reported findings, we believe that the combination of certain aliphatic alcohols and DDI through a carbonate linkage could significantly increase the performance of this class of therapeutic compounds; therefore, it merits further evaluations.Fil: Ravetti, Soledad. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: de Candia, Cristian Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Gualdesi, María Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Farmacia; ArgentinaFil: Pampuro, Sandra Esther. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Turk, Gabriela Julia Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Quevedo, Mario Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Farmacia; ArgentinaFil: Briñon, Margarita Cristina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Farmacia; Argentin

Shelf-Life Prediction of Extra Virgin Olive Oils Using an Empirical Model Based on Standard Quality Tests

Extra virgin olive oil shelf-life could be defined as the length of time under normal storage conditions within which no off-flavours or defects are developed and quality parameters such as peroxide value and specific absorbance are retained within accepted limits for this commercial category. Prediction of shelf-life is a desirable goal in the food industry. Even when extra virgin olive oil shelf-life should be one of the most important quality markers for extra virgin olive oil, it is not recognised as a legal parameter in most regulations and standards around the world. The proposed empirical formula to be evaluated in the present study is based on common quality tests with known and predictable result changes over time and influenced by different aspects of extra virgin olive oil with a meaningful influence over its shelf-life. The basic quality tests considered in the formula are Rancimat® or induction time (IND); 1,2-diacylglycerols (DAGs); pyropheophytin a (PPP); and free fatty acids (FFA). This paper reports research into the actual shelf-life of commercially packaged extra virgin olive oils versus the predicted shelf-life of those oils determined by analysing the expected deterioration curves for the three basic quality tests detailed above. Based on the proposed model, shelf-life is predicted by choosing the lowest predicted shelf-life of any of those three tests

Adolfo Bioy Casares: Dormir al sol, a ficção biomédica como performance ética

http://dx.doi.org/10.5007/2175-7992.2016v23n1p160Focused on the novel Dormir al sol (1973), by Adolfo Bioy Casares, this essay analyses the productivity of heuristics and ethical suggestions in this work. It takes the theory and practice of the science fiction novel as a reference. This literary heuristics by Bioy Casares can be thought of as an aesthetic that pursues the representation of an ethical performance within the speculative dimension of science fiction. In this sense, and to orientate the reflection I propose here, the question is: what is the ethical performance, in the novel, and why it could be so called?Focalizado no romance Dormir al sol (1973), de Adolfo Bioy Casares, este trabalho persegue a produtividade das sugestões heurísticas e éticas contidas em sua obra, tendo como ponto de referência a teoria e a prática do romance de ficção cientíica. Essa heurística literária de Bioy Casares pode ser pensada como uma estética que persegue a representação de uma performance ética dentro da dimensão especulativa própria da ficção científica. Nesse sentido, e para encaminhar a reflexão que procuro aqui, a pergunta é: qual seria a performance ética, no romance, e por que poderia ser assim denominada?

FICÇÕES LITERÁRIAS CONTEMPORÂNEAS: EL DESPERDICIO, DE MATILDE SÁNCHEZ, AMSTERDAM, DE IAN MCEWAN E LOS INGRÁVIDOS, DE VALERIA LUISELLI

Leitura em El desperdicio, de Matilde Sánchez (Argentina); Amsterdam, de Ian McEwan (England)e Los ingrávidos, de Valeria Luiselli (México) de pelo menos duas séries estruturais elaboradas com base nos efeitos causados por fantasmas, doenças e morte. Uma serie da organização textual que acompanha etéreos fantasmas culturais e afetivos e que deles se contamina. Outra serie, a que se pauta por desperdícios, fracassos e restos de promessas de glória descumpridas para orientar suas tramas e escolher a linguagem que emprega. Duas séries que se entrecruzam e potenciam.

Notaciones espaciales como formas de inteligibilidad cultural: José María Arguedas, Graciliano Ramos y Juan José Saer

Se estudian, en este artículo, formas de diseñar el espacio literario desde la perspectiva del “lugar” y del “movimiento en el lugar” en escritores con fuertes vínculos con, por lo menos, dos tradiciones. Es posible afirmar que cada tradición –y dentro de ellas, cada período histórico– consolida un modo de representación del espacio y, con eso, refleja una visión de mundo particular. La expectativa es encontrar nuevas formas de inteligibilidad de la cultura a partir de los problemas de figuración. Los tres autores estudiados son latinoamericanos: José María Arguedas es peruano y considerado un escritor bicultural, siendo como fue ligado tanto a las culturas indígenas de su región (aymará y quechua) como a lo que de más moderno presentaba la literatura de América Hispánica en las décadas de 1950 y 1960 (el realismo mágico y el testimonio narrativo); Graciliano Ramos es comúnmente asociado a la tradición literaria brasileña en lo que ésta tiene de occidental y moderna, pero muestra fuertes vínculos con el interior del nordeste brasileño, lo que le presta un perfil ligado a dos aspectos determinantes de la cultura brasileña; Juan José Saer es argentino y ligado, por un lado, a la tradición argentina de los siglos XIX y XX, y, por otro, conectado, por las circunstancias de su exilio (1968 hasta su muerte, en 2005) a Francia y a la cultura europea. De José Maria Arguedas su cuento “La agonía de Rasu-Ñiti”; de Graciliano Ramos se privilegia aquí su novela Vidas secas; de Juan José Saer, su novela El limonero real. Los tres textos apuntan, asimismo, a la constitución de un espacio rural, de resistencia cultural tanto a la tecnocracia del espacio urbano como al espacio convencionalizado del paraíso irredento al cual se relacionan, con base en ideologías de dominio, los territorios con herencias coloniales. Un espacio que no tiene una representación consolidada, que parece convocar a descifrar un tipo de código encriptado, a la manera de origen pero que exige también el trabajo de observar y de dar nombre a lo que está creándose al ritmo de la mirada y del movimiento