Sobre objetos y experiencias virtuales

This paper analyses basic onto-epistemological properties of the virtual reality and suggests these theses. First, the virtual reality establishes a new nature; its essential feature is to be an organic world of emancipated techno-theories. Second, the virtual reality doesn't substitutes the traditional book; it substitutes the world. Third, the experience of the world in the virtual reality excludes the natural world experience. Fourth, the ontology of virtual reality is build without an active individual subject. Finely, ther objects are therefore pure representations.Se analizan las propiedades ontoepistemológicas básicas de la realidad virtual y se defienden estas tesis: la realidad virtual constituye una nueva naturaleza cuyo rasgo esencial es ser un mundo orgánico de tecno-teorías emancipadas; la realidad virtual no sustituye al libro tradicional, sino al mundo, por lo que en su experiencia se prescinde de la experiencia natural; la ontología de la realidad virtual es construida sin sujeto individual activo; sus objetos son representaciones puras

La crítica de Hans Albert al purismo epistemológico.

Sin resume

Singularidad filosofica de una trivialidad logica : el cogito como 'protoenunciado'

El punto de partida cartesiano y la denuncia kantiana del "escándalo de la filosofía" La inversión que de la relación más natural entre representación y objeto representado hace el idealismo partiendo del mundo mental para dar razón de la existencia del mundo exterior y de la posibilidad del conocimiento (verdadero) constituye el núcleo de la acusación que Kant formula contra el idealismo como "escándalo de la filosofia y del entendimiento humano en general"

Ciencia y cultura globalizada. Cuestiones de epistemología cultural

Este trabajo pretende ser una contribución a la epistemología cultural. Analiza la relación entre ciencia y cultura global desde un punto de vista epistémico. Defiende que la ciencia es un agente o sujeto básico de la globalización debido a su estructuraThis paper aims to be a contribution to the cultural epistemology. It analyzes the relationship between science and global culture from an epistemic point of view. Defend that science is a basic subject or agent of globalization due to its transcultural

Contra qué compite Aquiles o los límites de traducción del lenguaje matemático al lenguaje natural

La cesura referencial entre el mundo descrito por las matemáticas y el mundo de la experiencia corriente es conocida, al menos, desde las aporías de Zenón. La imagen del mundo de la cultura contemporánea está fuertemente determinada por el conocimiento científico. Las teorías científicas incluyen en su explanans un lenguaje matemático cada vez más sofisticado. ¿Puede este lenguaje, aplicado a la descripción y explicación de hechos del mundo, ser traducido al lenguaje natural sin pérdida relevante de significado?The referential caesura between the world described by mathematics and the world of ordinary experience is known at least since Zeno's aporias. The image of the world of contemporary culture is strongly influenced by scientific knowledge. Scientific theories include in its explanans a mathematical language increasingly sophisticated. Can this language applied to the description and explanation of facts in the world be translated into natural language without significant loss of meaning

Nonlinear observation in fuel cell systems: a comparison between disturbance estimation and High-Order Sliding-Mode techniques

© . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/This paper compares two Nonlinear Distributed Parameter Observers (NDPO) for the observation of a Proton Exchange Membrane Fuel Cell (PEMFC). Both NDPOs are based on the discretisation of distributed parameters models and they are used to estimate the state profile of gas concentrations in the anode and cathode gas channels of the PEMFC, giving detailed information about the internal conditions of the system. The reaction and water transport flow rates from the membrane to the channels are uncertainties of the observation problem and they are estimated throughout all the length of the PEMFC without the use of additional sensors. The first observation approach is a Nonlinear Disturbance Observer (NDOB) for the estimation of the disturbances in the NDPO. In the second approach, a novel implementation of a High-Order Sliding-Mode (HOSM) observer is developed to estimate the true value of the states as well as the reaction terms. The proposed observers are tested and compared through a simulation example at different operating points and their performance and robustness is analysed over a given case study, the New European Driving Cycle.Peer ReviewedPostprint (author's final draft

Las imágenes del mundo y el porvenir de la filosofía

Sin resume

Nonlinear predictive control for durability enhancement and efficiency improvement in a fuel cell power system

© . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/In this work, a nonlinear model predictive control (NMPC) strategy is proposed to improve the efficiency and enhance the durability of a proton exchange membrane fuel cell (PEMFC) power system. The PEMFC controller is based on a distributed parameters model that describes the nonlinear dynamics of the system, considering spatial variations along the gas channels. Parasitic power from different system auxiliaries is considered, including the main parasitic losses which are those of the compressor. A nonlinear observer is implemented, based on the discretised model of the PEMFC, to estimate the internal states. This information is included in the cost function of the controller to enhance the durability of the system by means of avoiding local starvation and inappropriate water vapour concentrations. Simulation results are presented to show the performance of the proposed controller over a given case study in an automotive application (New European Driving Cycle). With the aim of representing the most relevant phenomena that affects the PEMFC voltage, the simulation model includes a two-phase water model and the effects of liquid water on the catalyst active area. The control model is a simplified version that does not consider two-phase water dynamics.Peer ReviewedPostprint (author's final draft