Research in power systems: power quality and electricity market

The research group REDES from UC3M has experience on electricity market, grid integration of wind energy and power quality. The group may offer consulting activities with a high component of research. We are looking for the collaboration of companies devoted to the consulting related to electricity markets, the integration of wind power in the electricity network, and with power quality.Contrato Programa de Comercialización e Internacionalización. Sistema Regional de Investigación Científica e Innovación Tecnológica. (Comunidad de Madrid; Universidad Carlos III de Madrid

Integrating descriptions of knowledge management learning activities into large ontological structures: A case study

Ontologies have been recognized as a fundamental infrastructure for advanced approaches to Knowledge Management (KM) automation, and the conceptual foundations for them have been discussed in some previous reports. Nonetheless, such conceptual structures should be properly integrated into existing ontological bases, for the practical purpose of providing the required support for the development of intelligent applications. Such applications should ideally integrate KM concepts into a framework of commonsense knowledge with clear computational semantics. In this paper, such an integration work is illustrated through a concrete case study, using the large OpenCyc knowledge base. Concretely, the main elements of the Holsapple & Joshi KM ontology and some existing work on e-learning ontologies are explicitly linked to OpenCyc definitions, providing a framework for the development of functionalities that use the built-in reasoning services of OpenCyc in KM ctivities. The integration can be used as the point of departure for the engineering of KM-oriented systems that account for a shared understanding of the discipline and rely on public semantics provided by one of the largest open knowledge bases available

Discriminating by Tagging: Artificial Distinction, Real Discrimination

We introduce a new variation of the hawk-dove game suggested by an experiment that studies the behavior of a group of domestic fowls when a subgroup has been marked. Speci cally we consider a population formed by two types of individual that fail to recog- nize their own type but do recognize the other type. In this game we find two evolutionarily stable strategies. In each of them, individuals from one type are always attacked more, whatever proportion of the population they represent. Our theoretical results are consistent with the conclusions drawn from experimental work, where marked fowls received more pecks than their unmarked counterparts.

The Stability of the Roommate Problem Revisited

The lack of stability in some matching problems suggests that alternative solution concepts to the core might be applied to find predictable matchings. We propose the absorbing sets as a solution for the class of roommate problems with strict preferences. This solution, which always exists, either gives the matchings in the core or predicts some other matchings when the core is empty. Furthermore, it satisfies an interesting property of outer stability. We also characterize the absorbing sets, determine their number and, in case of multiplicity, we find that they all share a similar structure.roommate problem, core, absorbing sets

La influencia de la violencia del contexto comunitario en las relaciones de los estudiantes en la Institución Educativa Jaime Salazar Robledo, ciudadela Tokio de la ciudad de Pereira

El presente trabajo se realizó para reflexionar sobre la incidencia de la violencia del contexto comunitario hacia el interior de la institución educativa, cómo el entorno social en el que los niños se desenvuelven se convierte en el factor principal para generar un comportamiento agresivo que no reconoce la norma y que se predispone a responder a cualquier situación que considere atenta a su integridad, desde esta perspectiva este informe me lleva a realizar un proceso de observación en el cual pude analizar la influencia del entorno en la vida escolar de los niños y niñas de cuarto grado de primaria de la institución educativa Jaime Salazar Robledo en la comuna Villa Santana, . De esta manera inicio haciendo un análisis del contexto donde se realizó la práctica en el cual hago una descripción de donde nace la comuna y cómo surge la idea de construir una institución donde se pudiera acoger la población que llegaba a vivir en los barrios aledaños, se evidencio la necesidad de llevarle educación a niños que se encontraban descolarizados y por sus dificultades económicas no podían estudiar en otros colegios, es así como se realizó la práctica como docente de apoyo en las aulas con estudiantes de cuarto de primaria y se pudieron identificar comportamientos agresivos entre los niños y de ellos hacia su docente los cuales generan tensiones en el ambiente escolar donde se hace más difícil la convivencia entre alumnos y docentes, es de esta manera que se hace una descripción de esta situación para la cual fue necesario abordar las categorías que me permitieron reflexionar sobre la temática, la violencia escolar, la violencia en la comunidad, el conflicto que le dan bases teóricas para justificar las percepciones que he tejido alrededor de las acciones de los niños, como base para sustentar

Solar access assessment in dense urban environments: the effect of intersections in an urban canyon

The urban canyon model has been recurrently used as a basis for many solar access studies. However, its conception as endless structures disregards the effect of street intersections, despite being characteristic elements of urban fabrics. This paper aims to evaluate the impact of street discontinuities on solar access over building façades. The potential of crossings to increase the available radiation has been assessed through computer simulations in dense urban environments in a Mediterranean location. For the cases studied, results show that local effects of an intersection almost disappear beyond a speci¿c distance for each aspect ratio, which can be helpful to determine the suitable level of detail for solar analyses at an urban fabric scale.Postprint (published version

Software Design Guidelines for Usability

For years, the Human Computer Interaction (HCI) community has crafted usability guidelines that clearly define what
characteristics a software system should have in order to be easy to use. However, in the Software Engineering (SE)
community keep falling short of successfully incorporating these recommendations into software projects. From a SE
perspective, the process of incorporating usability features into software is not always straightforward, as a large number
of these features have heavy implications in the underlying software architecture. For example, successfully including an
“undo” feature in an application requires the design and implementation of many complex interrelated data structures and
functionalities. Our work is focused upon providing developers with a set of software design patterns to assist them in the
process of designing more usable software. This would contribute to the proper inclusion of specific usability features
with high impact on the software design. Preliminary validation data show that usage of the guidelines also has positive
effects on development time and overall software design quality