Quantum cosmology of quadratic f(R) theories with a FRW metric

We study the quantum cosmology of a quadratic $f(R)$ theory with a FRW metric, via one of its equivalent Horndeski type actions, where the dynamics of the scalar field is induced. The classical equations of motion and the Weeler-deWitt equation, in their exact versions, are solved numerically. From the choice of a free parameter in the action follow two cases, inflation + exit and inflation alone. The numerical solution of the Wheeler-DeWitt equation depends strongly on the boundary conditions, which can be chosen so that the resulting wave function of the universe seems to be normalizable and consistent with hermitian operators.Comment: 6 pages, 4 figure

Universal Resource Lifecycle Management

This paper presents a model and a tool that allows Web users to define, execute, and manage lifecycles for any artifact available on the Web. In the paper we show the need for lifecycle management of Web artifacts, and we show in particular why it is important that non-programmers are also able to do this. We then discuss why current models do not allow this, and we present a model and a system implementation that achieves lifecycle management for any URI-identifiable and accessible object. The most challenging parts of the work lie in the definition of a simple but universal model and system (and in particular in allowing universality and simplicity to coexist) and in the ability to hide from the lifecycle modeler the complexity intrinsic in having to access and manage a variety of resources, which differ in nature, in the operations that are allowed on them, and in the protocols and data formats required to access them

The effects of context processing on social cognition impairments in adults with Aspergers syndrome

Social cognition—the basis of all communicative and otherwise interpersonal relationships—is embedded in specific contextual circumstances which shape intrinsic meanings. This domain is compromised in the autism spectrum disorders (ASDs), including Asperger’s syndrome (AS) (DSM-V). However, the few available reports of social cognition skills in adults with AS have largely neglected the effects of contextual factors. Moreover, previous studies on this population have also failed to simultaneously (a) assess multiple social cognition domains, (b) examine executive functions, (c) follow strict sample selection criteria, and (d) acknowledge the cognitive heterogeneity typical of the disorder. The study presently reviewed (Baez et al., 2012), addressed all these aspects in order to establish the basis of social cognition deficits in adult AS patients. Specifically, we assessed the performance of AS adults in multiple social cognition tasks with different context-processing requirements. The results suggest that social cognition deficits in AS imply a reduced ability to implicitly encode and integrate contextual cues needed to access social meaning. Nevertheless, the patients’ performance was normal when explicit social information was presented or when the situation could be navigated with abstract rules. Here, we review the results of our study and other relevant data, and discuss their implications for the diagnosis and treatment of AS and other neuropsychiatric conditions (e.g., schizophrenia, bipolar disorder, frontotemporal dementia). Finally, we analyze previous results in the light of a current neurocognitive model of social-context processing.Fil: Báez Buitrago, Sandra Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Neurociencia Cognitiva. Fundación Favaloro. Instituto de Neurociencia Cognitiva; Argentina. Universidad Diego Portales; ChileFil: Ibanez Barassi, Agustin Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Neurociencia Cognitiva. Fundación Favaloro. Instituto de Neurociencia Cognitiva; Argentina. Universidad Diego Portales; Chile. Universidad Autónoma del Caribe; Colombia. Australian Research Council; Australi

A lower bound in an approximation problem involving the zeros of the Riemann zeta function

We slightly improve the lower bound of Baez-Duarte, Balazard, Landreau and Saias in the Nyman-Beurling formulation of the Riemann Hypothesis as an approximation problem. We construct Hilbert space vectors which could prove useful in the context of the so-called `Hilbert-Polya idea'.Comment: 17 pages, v2 adds two references. No mathematical change

Absorption and Direct Processes in Chaotic Wave Scattering

Recent results on the scattering of waves by chaotic systems with losses and direct processes are discussed. We start by showing the results without direct processes nor absorption. We then discuss systems with direct processes and lossy systems separately. Finally the discussion of systems with both direct processes and loses is given. We will see how the regimes of strong and weak absorption are modified by the presence of the direct processes.Comment: 8 pages, 4 figures, Condensed Matter Physics (IV Mexican Meeting on Mathematical and Experimental Physics), Edited by M. Martinez-Mares and J. A. Moreno-Raz

La resolución de problemas y el uso de técnicas estadísticas en el contexto de la carrera de ingeniería mecánica

El objetivo fundamental de la matemática es servir de instrumentos de modelación a diferentes situaciones que se presentan en otras disciplinas de la carrera o en el ejercicio profesional de sus graduados. Las heurísticas, las habilidades, la meta-cognición y las creencias todas ellas importantes. De los elementos de la estrategia didáctica que de ahí emerge se tienen los modelos matemáticos que es un concepto que debe dominar el egresado durante su vida profesional. G.Polya planteó.“¿Qué significa dominar las matemáticas? Significa poder resolver problemas, y no solo problemas tipos, sino también problemas que exigen pensamiento independiente, sentido común, originalidad, inventiva. “La atención se ha centrado en el proceso implicado en la resolución de problemas Se muestra un ejemplo de los resultados obtenidos de un estudio realizado entre el Departamento de Matemática y la facultad de Mecánica de la Universidad de Camagüey (Cuba)

Desarrollo y formación de habilidades en la asignatura de estadística en contexto de universalizacion de la enseñanza

El proceso de universalización en Cuba tiene raíces profundas, se gesta con la intención de llevar la universidad a todos, aplicando nuevas formas y métodos de enseñanza que se describen en las tendencias modernas de la educación superior, con el uso de las tecnologías más avanzadas, de manera que todos tengan derecho y acceso a una mejor educación con el objetivo supremo de lograr un mundo mejor para todos ,a partir de los resultados de investigaciones relacionadas con el diseño de diversas disciplinas y carreras referidas en la bibliografía , es que se han aplicado las consideraciones teóricas del modelo de invariante de habilidad profesional en la asignatura de Estadística, con el desarrollo y formación de habilidades en la asignatura de Estadística en contexto de universalización de la enseñanza