Bio-inspired Mechanisms for Artificial Self-organised Systems

Research on self-organization tries to describe and explain forms, complex patterns and behaviours that arise from a collection of entities without an external organizer. As researchers in artificial systems, our aim is not to mimic self-organizing phenomena arising in Nature, but to understand and to control underlying mechanisms allowing desired emergence of forms, complex patterns and behaviours. In this paper we analyze three forms of self-organization: stigmergy, reinforcement mechanisms and cooperation. For each forms of self-organisation, we present a case study to show how we transposed it to some artificial systems and then analyse the strengths and weaknesses of such an approach

Stochastic models and numerical algorithms for a class of regulatory gene networks

Regulatory gene networks contain generic modules like those involving feedback loops, which are essential for the regulation of many biological functions. We consider a class of self-regulated genes which are the building blocks of many regulatory gene networks, and study the steady state distributions of the associated Gillespie algorithm by providing efficient numerical algorithms. We also study a regulatory gene network of interest in synthetic biology and in gene therapy, using mean-field models with time delays. Convergence of the related time-nonhomogeneous Markov chain is established for a class of linear catalytic networks with feedback loop

Strategic tradeoffs in competitor dynamics on adaptive networks

Recent empirical work highlights the heterogeneity of social competitions such as political campaigns: proponents of some ideologies seek debate and conversation, others create echo chambers. While symmetric and static network structure is typically used as a substrate to study such competitor dynamics, network structure can instead be interpreted as a signature of the competitor strategies, yielding competition dynamics on adaptive networks. Here we demonstrate that tradeoffs between aggressiveness and defensiveness (i.e., targeting adversaries vs. targeting like-minded individuals) creates paradoxical behaviour such as non-transitive dynamics. And while there is an optimal strategy in a two competitor system, three competitor systems have no such solution; the introduction of extreme strategies can easily affect the outcome of a competition, even if the extreme strategies have no chance of winning. Not only are these results reminiscent of classic paradoxical results from evolutionary game theory, but the structure of social networks created by our model can be mapped to particular forms of payoff matrices. Consequently, social structure can act as a measurable metric for social games which in turn allows us to provide a game theoretical perspective on online political debates.Comment: 20 pages (11 pages for the main text and 9 pages of supplementary material

Review of Torture: A Sociology of Violence and Human Rights

Como la empresa SpaceWise Perú afrontaba muchos problemas en cuanto a información no concisa y de forma no oportuna sobre las ventas de la compañía lo cual le afectaba negativamente en la toma de decisiones. Frente a este problema, surge la necesidad de adquirir un datamart para la transformación de datos en información, que es el objetivo de esta investigación. Actualmente, el área comercial obtiene esta información de las ventas por parte del área contable quien exporta los datos y los proporciona en un excel para que luego sean organizados y clasificados según los indicadores que se desean obtener. Por esta razón, la implementación del datamart, en el área comercial de la Empresa SpaceWise, disminuyó los tiempos mecánicos en ordenar, organizar y clasificar la información histórica de las ventas, y los resultados mejoraron notablemente, puesto que se alcanzó un porcentaje de 97%

Fabricación heroica y construcción de la memoria histórica chilena (1844-1875)

International audienceStudy of four books which contributed to the building of the pre-Pacific War Chilean national memory: Desmadryl (Narciso), Galería nacional o colección de biografías y retratos de hombres célebres de Chile, Santiago, 1854; Suárez (José Bernardo), Rasgos biográficos de hombres notables de Chile, Santiago, 1863; Idem, Composiciones en verso de poetas chilenos, Santiago, 1873; Escuela nocturna de artesanos, Conferencia popular Los padres de la Patria, Santiago, 1875. We show how the building of a national memory is a collective entreprise in which many authors propose each one a specific short thread, made in function of specific needs and short range contextual elements. The question is to determine how such specifically oriented thread terminate coagulating into a globally cohesive national narrativeEstudio de cuatro obras: Desmadryl (Narciso), Galería nacional o colección de biografías y retratos de hombres célebres de Chile, Santiago, 1854; Suárez (José Bernardo), Rasgos biográficos de hombres notables de Chile, Santiago, 1863; Idem, Composiciones en verso de poetas chilenos, Santiago, 1873; Escuela nocturna de artesanos, Conferencia popular Los padres de la Patria, Santiago, 1875. Se muestra como la constitución de una memoria histórica, si bien tiende hacia un punto de gravedad que es la leyenda final, de hecho se crea a base de hebras relativamente cortas, propuestas por autores que actuan cada uno por su cuenta, en relación con otros de su entorno inmediato, a corto alcance, en función de elementos de su contexto inmediato y de oportunidades