Ayúdanos a hacer un poquito de ciencia / Help us to make a bit of Science

Se puede ayudar en un experimento simplemente visitando una página web. ¿Nos ayudas?

Víctor M. Rivas Santos

/cc @geneura – http://vrivas.es/dcai16
(English version)

¿Me echas una mano con unos experimentos símplemente accediendo a la web http://vrivas.es/dcai16?

Como muchos sabéis, últimamente me dedico a la ejecución de algoritmos evolutivos y redes neuronales desde navegadores web. En relación a esta investigación, me gustaría enviar un trabajo a un congreso que habrá en Sevilla este año, llamado DCAI’2016.

Ya tengo el trabajo bastante avanzado, pero me gustaría poder tener más resultados; así que, si no te importa, accede a la web http://vrivas.es/dcai16 desde donde intentamos predecir valores de una serie temporal de temática económica.

Ten en cuenta que:

  • Puedes acceder a la página tantas veces como desees, y también abandonarla en el momento que decidas.
  • El programa que se ejecutará no instalará nada en tu ordenador, móvil o tablet, ni siquiera cookies.
  • Los algoritmos evolutivos suelen ser lentos, por eso, no te preocupes si tarda en…

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Jornada sobre Smart Cities y Movilidad

El jueves 26 de noviembre de 2015 celebramos en la Sala de Usos Múltiples del CITIC-UGR (C/ Periodista Rafael Gómez, nº 2) la Jornada sobre Smart Cities y Movilidad, enmarcada en el Programa De Ayudas Genil Para Realización De Actividades Por Grupos De Investigación Interdiciplinares (RAGII-2015).

El objeto de esta Jornada fue la investigación en el área de la gestión de la movilidad, internet de las cosas y smart cities.

A lo largo de la mañana asistimos a varias conferencias, impartidas por responsables del Area de Movilidad del Ayuntamiento de Granada, de varias empresas, así como por parte de investigadores de la Universidad de Granada en este ámbito.

Los objetivos finales fueron crear sinergia entre los diversos grupos de investigación y empresas de este área, así como facilitar el contacto de cara a promover colaboraciones, tales como solicitar proyectos, o realizar transferencia de conocimiento a partir de los resultados de investigación.

El desarrollo de la Jornada se basó en presentaciones de unos 40 minutos, en las que el ponente, por parte del Área de Movilidad del Ayuntamiento de Granada, Nazaríes, UXMobile, Geokeda, e investigadores de los grupos de investigación, comentaron los proyectos en los que trabajan actualmente en el área de las smart cities, así como las problemáticas, y los retos a los que se enfrentan.

cartel_mobilidad_smart_cities

GeNeura at European Project MUSES Final Review

GeNeura’s members have been working in the three-year long, FP7 European project MUSES, which faced its last review last week at the European Commision Beaulieu Quarter Buildings in Brussels.

UGR was one of the partners participating in this project. More concretely, GeNeura’s members have contributed by leading WP2 – MUSES framework definition and integration during the completion of tasks to define the MUSES System Architecture. In addition, GeNeura’s research has been applied to the project in WP5 – Self-adaptive event correlation, lead by a Spanish security company S2 Grupo. The main purpose of this WP was to develop a system which, on the one side, uses event correlation to detect Security Policy violations and, on the other side, performs an analysis of all the data in the system and creates new Security Policies or enhances the existing ones. Different types of classification, rule association, and clustering algorithms, as well as Data Mining techniques, have been applied with satisfactory results. These results were specially welcomed by the comission, ponting that such a system will be very helpful to enhance security. Also, MUSES is an Open Software project, and you can contribute at https://github.com/MusesProject

The results were presented by S2 Grupo and GeNeura together. The slides are now published on Slideshare:

It has been a pleasure for GeNeura to work in MUSES

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[Paper] Studying the effect of population size in distributed evolutionary algorithms on heterogeneous clusters

Finally we have published in Applied Soft Computer journal the last paper related with my thesis. We used OSGiLiath to perform a number of cool experiments related with automatic adaptation of dEAs on heterogeneous clusters.

The abstract:

Distributed Evolutionary Algorithms are traditionally executed on homogeneous dedicated clusters, despite most scientists have access mainly to networks of heterogeneous nodes (for example, desktop PCs in a lab). Fitting this kind of algorithms to these environments, so that they can take advantage of their heterogeneity to save running time, is still an open problem. The different computational power of the nodes affects the performance of the algorithm, and tuning or fitting it to each node properly could reduce execution time.

Since the distributed Evolutionary Algorithms include a whole range of parameters that influence the performance, this paper proposes a study on the population size. This parameter is one of the most important, since it has a direct relationship with the number of iterations needed to find the solution, as it affects the exploration factor of the algorithm. The aim of this paper consists in validating the following hypothesis: fitting the sub-population size to the computational power of the heterogeneous cluster node can lead to an improvement in running time with respect to the use of the same population size in every node.

Two parameter size schemes have been tested, an offline and an online parameter setting, and three problems with different characteristics and computational demands have been used.

Results show that setting the population size according to the computational power of each node in the heterogeneous cluster improves the time required to obtain the optimal solution. Meanwhile, the same set of different size values could not improve the running time to reach the optimum in a homogeneous cluster with respect to the same size in all nodes, indicating that the improvement is due to the interaction of the different hardware resources with the algorithm. In addition, a study on the influence of the different population sizes on each stage of the algorithm is presented. This opens a new research line on the fitting (offline or online) of parameters of the distributed Evolutionary Algorithms to the computational power of the devices.

The paper (currently “In press” form) can be downloaded from http://www.sciencedirect.com/science/article/pii/S1568494615006468