Percolation for the stable marriage of Poisson and Lebesgue with random appetites

Let $\Xi$ be a set of centers chosen according to a Poisson point process in $\mathbb R^d$. Consider the allocation of $\mathbb R^d$ to $\Xi$ which is stable in the sense of the Gale-Shapley marriage problem, with the additional feature that every center $\xi\in\Xi$ has a random appetite $\alpha V$, where $\alpha$ is a nonnegative scale constant and $V$ is a nonnegative random variable. Generalizing previous results by Freire, Popov and Vachkovskaia (\cite{FPV}), we show the absence of percolation when $\alpha$ is small enough, depending on certain characteristics of the moment of $V$.Comment: 12 pages. Final versio

Biomechanical analysis of a cranial Patient Specific Implant on the interface with the bone using the Finite Element Method

- New advance technologies based on reverse engineering , design and additive manufacturing, have expanded design capabilities for biomedical applications to include Patient Specific Implants (PSI). This change in design paradigms needs advanced tools to assess the mechanical performance of the product, and simulate the impact on the patient. In this work, we perform a structural analysis on the interface of a cranial PSI under static loading conditions. Based on those simulations, we have identified the regions with high stress and strain and checked the failure criteria both in the implant and the skull. We evaluate the quality of the design of the implant and determine their response given different materials, in order to ensure optimality of the final product to be manufactured

Can Network Analysis Techniques help to Predict Design Dependencies? An Initial Study

The degree of dependencies among the modules of a software system is a key attribute to characterize its design structure and its ability to evolve over time. Several design problems are often correlated with undesired dependencies among modules. Being able to anticipate those problems is important for developers, so they can plan early for maintenance and refactoring efforts. However, existing tools are limited to detecting undesired dependencies once they appeared in the system. In this work, we investigate whether module dependencies can be predicted (before they actually appear). Since the module structure can be regarded as a network, i.e, a dependency graph, we leverage on network features to analyze the dynamics of such a structure. In particular, we apply link prediction techniques for this task. We conducted an evaluation on two Java projects across several versions, using link prediction and machine learning techniques, and assessed their performance for identifying new dependencies from a project version to the next one. The results, although preliminary, show that the link prediction approach is feasible for package dependencies. Also, this work opens opportunities for further development of software-specific strategies for dependency prediction.Comment: Accepted at ICSA 201

Negocios en familia

El artículo examina el tema de los negocios familiares, en las cuales se identifican elementos como propiedad, poder y continuidad, que se ven afectados por las relaciones intrafamiliares e intergeneracionales. Este tipo de empresas está atenta a las tendencias y cambios del entorno, para ajustarse a las necesidades y requerimientos de la empresa del futuro. El documento destaca la importancia de los ciclos de vida persona, familia y empresa, haciendo evidentes las razones y motivaciones que permiten tomar las decisiones más acertadas para todos los involucrados. Al analizar los negocios familiares como un todo, la convergencia de los ciclos de vida será el problema que deben afrontar las empresas familiares. Por ello la propuesta estratégica acorde a los intereses familiares favorece la definición de objetivos estratégicos y los lineamientos para una gestión exitosa, debe evitar no caer en trampas emotivas que lleven al cierre de la organización luego de años de trabaj

Caminos desde el otro: el retorno a la “zona gris”

El texto pretende realizar un análisis del concepto de la Zona Gris presentado por Primo Levi. Para ello, se analizan tres tensiones fundamentales de su obra; a saber: (1) Los hundidos y los salvados; (2) Los diversos sujetos de enunciación y (3) mundo animal vs mundo civilizado