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TEO: Full-Size Humanoid Robot Design Powered by a Fuel Cell System, TEO robot design powered by a fuel cell system

  • Martínez de la Casa Díaz, Santiago
  • Monje Micharet, Concepción Alicia
  • Jardón Huete, Alberto
  • Pierro, Paolo
  • Balaguer Bernaldo de Quirós, Carlos
  • Muñoz, D
Versión pre-print (sin revisión por pares) del artículo publicado en Cybernetics and Systems: An International Journal (2012), 43(3), 163-180, accesible en linea: http://dx.doi.org/10.1080/01969722.2012.659977., This is an Author's Original Manuscript (non-peer reviewed) of an article published in Cybernetics and Systems: An International Journal (2012), 43(3), 163-180, available online: http://dx.doi.org/10.1080/01969722.2012.659977., This article deals with the design of the full-size humanoid robot TEO, an improved version of its predecessor Rh-1. The whole platform is conceived under the premise of high efficiency in terms of energy consumption and optimization. We will focus mainly on the electromechanical structure of the lower part of the prototype, which is the main component demanding energy during motion. The dimensions and weight of the robotic platform, together with its link configuration and rigidity, will be optimized. Experimental results are presented to show the validity of the design., The research leading to these results has received funding from the RoboCity2030-II-CM project (S2009/DPI-1559), funded by Programas de Actividades I+D en la Comunidad de Madrid and cofunded by Structural Funds of the EU.

Methodological design and comparative evaluation of a MAS providing AmI

  • Venturini, Verónica
  • Carbó Rubiera, Javier Ignacio
  • Molina López, José Manuel
Researches on Ambient Intelligent and Ubiquitous Computing using wireless technologies have increased in the last years. In this work, we review several scenarios to define a multi-agent architecture that support the information needs of these new technologies, for heterogeneous domain. Our contribution consists of designing in a methodological way a Context Aware System (involving location services) using agents that can be used in very different domains. We describe all the steps followed in the design of the agent system. We apply a hybridizing methodology between GAIA and AUML. Additionally we propose a way to compare different agent architectures for Context Aware System using agent interactions. So, in this paper, we describe the assignment of weight values to agents interaction in two different MAS architectures for Context Aware problems solving different scenarios inspired in FIPA standard negotiation protocols., Publicado

¿Qué hacemos con el trabajo? [book review]

  • Marugán Pintos, Begoña
Este artículo reseña: Qué hacemos con el trabajo. Juan José Castillo (coord.) ; Ruth Caravantes Vidriales... [et al.]. Madrid : Akal, 2013. 72 p. (Qué hacemos ; 9). ISBN 9788446038245

Cuidado e identidad de género : de las madres que trabajan a los hombres que cuidan, Care and gender identity : from working mothers to caring men

  • Tobio Soler, Melida Constanza
El cuidado de las personas emerge como un nuevo ámbito de la realidad y campo de conocimiento, hasta ahora invisible. Desde la teoría feminista se identifican las prácticas sociales complejas en que consiste, así como la ética de la responsabilidad en que se sustenta, construida, según Gilligan, a lo largo del proceso de socialización femenino. Al incorporarse los hombres al cuidado se replantea la especificidad femenina de tal actividad y se abren nuevos interrogantes acerca de la identidad de género. Por otra parte, el carácter dicotómico del género se pone en cuestión desde la perspectiva de autores como Fausto-Esterling o Butler, problematizando no solo lo femenino sino también lo masculino. Si en los años cuarenta del pasado siglo Simone de Beauvoir se adelanta al constructivismo sociológico preguntándose cómo se hace una mujer, a comienzos del siglo XXI cobra sentido preguntarse qué es un hombre., Care has appeared as a new dimension of social reality and research field, until not so long ago invisible. Feminist theory has identified the complex social practices it is made of as well as the ethics of responsibility which underpin it, all of it, according to Gilligan, constructed through the long process of women’s socialization. When men become involved in care, its female specificity is challenged and new questions on gender identity arise. On the other hand the dichotomous character of gender is discussed by authors like Fausto Esterling or Butler; not just women but also men are problematised. If in the forties of the past century Simone de Beauvoir goes ahead sociological constructivism when she asks how is a woman made, at the beginning of the XXI it makes sense to ask what is a man.

Symmetries shape the current in ratchets Induced by a biharmonic driving force

  • Quintero, Niurka R.
  • Cuesta, José A.
  • Álvarez Nodarse, Renato
Equations describing the evolution of particles, solitons, or localized structures, driven by a zero-average, periodic, external force, and invariant under time reversal and a half-period time shift, exhibit a ratchet current when the driving force breaks these symmetries. The biharmonic force f(t)=ϵ₁cos(qωt + ϕ₁)+ϵ₂ cos(pωt + ϕ₂) does it for almost any choice of ϕ₁ and ϕ₂, provided p and q are two coprime integers such that p + q is odd. It has been widely observed, in experiments in semiconductors, in Josephson junctions, photonic crystals, etc., as well as in simulations, that the ratchet current induced by this force has the shape vαε_1^p ε_2^q cos(pϕ₁−qϕ₂+θ₀) for small amplitudes, where θ₀ depends on the damping (θ₀ = π/2 if there is no damping, and θ₀ = 0 for overdamped systems). We rigorously prove that this precise shape can be obtained solely from the broken symmetries of the system and is independent of the details of the equation describing the system., We acknowledge financial support through Grant Nos. MTM2006-13000-C03-02 (R.A.N.) No. FIS2008-02380/FIS (N.Q.R), and MOSAICO (J.A.C.), from Ministerio de Educación y Ciencia, Spain; Grant Nos. FQM262 (R.A.N.), No. FQM207 (N.Q.R.), and No. P03-FQM262 (R.A.N.), from Junta de Andalucía, Spain; and project MODELICO-CM (J.A.C.) from Comunidad de Madrid, Spain.

Los efectos de la inmigración sobre la demanda relativa de trabajo cualificado vs. poco cualificado: evidencia para España

  • Dolado, Juan José
  • Jimeno, Juan F.
  • Duce, Rosa
En este artículo elaboramos un modelo estilizado que sirve para analizar los efectos de la inmigración sobre el trabajo del país receptor. En dicho modelo, los trabajadores nativos cualificados y poco cualificados se consideran como inputs sustitutivos en la producción, al tiempo que los inmigrantes aportan mano de obra complementaria respecto al primer tipo de trabajo y sustitutiva respecto al segundo. Los salarios de los trabajadores poco cualificados se determinan a través de la negociación colectiva. Se demuestra que, independientemente del grado de competencia vigente en el mercado de trabajo cualificado, existen condiciones suficientes para que la inmigración produzca efectos globalmente favorables sobre los trabajadores nacionales. Las implicaciones del modelo se contrastan empíricamente utilizando información sobre los cambios inducidos en el salario y en el nivel de empleo de los trabajadores en las provincias españolas, a consecuencia del proceso de regularización de inmigrantes que tuvo lugar en España a mediados de 1991. La evidencia aportada indica que los efectos del aumento de la tasa de inmigración asociado a dicha medida fueron favorables, aunque de pequeña magnitud., Publicado

A simple dynamic model of uneven development and overtaking

  • Desmet, Klaus
This is the accepted version of the following article: Desmet, K. (2002), A Simple Dynamic Model of Uneven Development and Overtaking. The Economic Journal, 112(482) 894–918, which has been published in final form at: http://dx.doi.org/10.1111/1468-0297.00071, This paper extends the Brezis et al. (1993) Ricardian leapfrogging model by introducing geographically mobile capital and allowing for a wider variety of development patterns. In a two-region economy, localised learning-by-doing causes specialisation and uneven development. Technological change reverses the existing development pattern if the new technology locates in the low-wage region. However, the development pattern may also be reinforced if spillovers between the old and the new technology make the leading region a more attractive location. Capital flows are explicitly analysed and it is furthermore shown that inter-regional transfers may reduce the chance of take-off., Financial aid from the Bradley Foundation, from the Spanish Ministry of Education (grant PB98-0139), and from the European Union Directorate General XII (project SERD-1999-000102) is greatly appreciated., Publicado

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