Pablo Cortés González

Multiobjective Genetic Algorithm for Extracting Subgroup Discovery Fuzzy Rules

This paper presents a multiobjective genetic algorithm for obtaining fuzzy rules for subgroup discovery. This kind of fuzzy rules lets us represent knowledge about patterns of interest in an explanatory and understandable form which can be used by the expert. The multiobjective algorithm proposed in this paper defines three objectives. One of them is used as a restriction on the rules in order to obtain a Pareto front composed of a set of quite different rules with a high degree of coverage over the examples. The other two objectives take into account the support and the confidence of the rules. The use of the mentioned objective as restriction allows us the extraction of a set of rules which describe more complete information on most of the examples. Experimental evaluation of the algorithm, applying it to a market problem shows the validity of the proposal obtaining novel and valuable knowledge for the experts

Genetic lateral tuning for subgroup discovery with fuzzy rules using the algorithm NMEEF-SD

Abstract The main objective of subgroup discovery is to discover interesting and interpretable patterns with respect to a specific property. The use of evolutionary fuzzy systems provides good algorithms to approach this problem. In this sense, NMEEF-SD algorithm –one of the most representative evolutionary fuzzy systems for subgroup discovery–obtains precise and interpretable subgroups. However in the majority of the evolutionary fuzzy systems, the membership functions of the linguistic labels are usually fixed to static values and the partitions are not adapted to the context of each variable. In this paper, a post-processing tuning step to improve the results of the subgroup discovery algorithm NMEEF-SD is proposed, allowing the partitions to be adapted to the context the variables. The application of this tuning step is a novelty in subgroup discovery and consist of a genetic algorithm which allows the lateral displacement of the membership functions of a label considering a unique parameter, using th...

Facebook como espacio para compartir aprendizajes entre grupos de alumnos de distintas universidades / Facebook as a virtual place to share learning between groups of students from different universities

El presente articulo se basa en la experiencia que estamos realizando profesorado de las universidades de Malaga, Almeria y Valladolid (sede de Soria), poniendo en relacion a nuestro alumnado a traves de un grupo cerrado de Facebook. La experiencia surge a partir de un Proyecto de Innovacion Educativa, Bioeducamos, que desarrollamos desde hace 3 anos. Basicamente consiste en compartir los relatos escolares de nuestro alumnado como herramienta basica de formacion en las diversas asignaturas que estamos implicados. Ante la dificultad de conseguir encuentros presenciales entre el alumnado, nos planteamos utilizar las posibilidades que nos ofrece Facebook como recurso de comunicacion entre los diversos grupos y compartir no solo las experiencias particulares, sino tambien reflexiones, noticias, etc. que pudieran ser de interes. De este modo se consiguio una comunidad reflexiva amplia y diversa, con trayectorias diferentes, que enriquece de forma notable el trabajo de cada grupo. Los relatos (de quienes dieron su consentimiento), fueron subidos a un google drive y sirvio de punto de partida para la experiencia. Ademas de la relacion publica a traves de las entradas se produjeron comunicaciones privadas o en pequenos grupos, de acuerdo al interes que suscitaron los distintos relatos en cada alumno en particular. El articulo que proponemos rescata esta experiencia tomando en consideracion el contenido de las entradas compartidas asi como la vision del alumnado y del profesorado implicado. Se va a proceder a recabar informacion del estudiantado acerca de su participacion y el interes suscitado y de los efectos sobre su aprendizaje y participacion. Igualmente nos planteamos una reflexion sobre las lineas docentes que se abren debido al uso de esta herramienta y que van en torno a la constitucion del aprendizaje expandido, asi como la extension de una comunidad de aprendizaje.AbstractThis paper is based on the experience developed by teachers from the universities of Malaga, Almeria and Valladolid (Soria Headquarters) that relates to our students through a closed Facebook group. The experience comes from an Educational Innovation Project called ‘Bioeducamos’ for 3 years. It basically consists in sharing students’ school stories as a resource of the training process in the different subjects in which we are involved. Given the difficulty of getting face meetings between students of different universities, we propose to use the possibilities that Facebook offers us as a dynamic tool for the chanelling of comunication under the particular experiences and the emerging thoughts, tasks, news , etc. the students could be interested of. Thus, we achieved a broad and diverse thoughtful community with different cultural trajectories which enriches significantly the work of each group. The stories (after consent), were uploaded to a google drive platform for a starting point for the experience. In addition, out of the general agreements of the activity private communications entries happened according to the interest aroused from the different and particular stories of each student. In this paper we rescue this experience taking into account the content of the shared inputs likewise the vision of students and teachers involved. We are going to gather information from students about their participation and the interest generated in this activity, and the impact on their learning and participation in the different subjects. We also propose a common reflection about the teaching lines open to us after the use of this tool. These are related to pedagogical affairs such as the possibilities of an expanded learning or about how a virtual extension of a learning community is formed?