250 research outputs found

    Fundamento del derecho natural según los principios de la doctrina de la ciencia

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    1.-El carácter de la racionalidad consiste en que el agente [das Handelnde] y lo actuado [das Behandelte] son uno y lo mismo; y con esta descripción se ha agotado el ámbito de la razón como tal. El uso del lenguaje ha depositado en la palabra Yo este concepto sublime para aquéllos que son capaces de él, para los que son capaces de la abstracción de su propio Yo

    Vicia faba Crop Residues for Sustainable Electricity Generation Using a Sludge-based Microbial Fuel Cell

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    Microbial fuel cells (MFC) simultaneously degrade organic substrates and generate electricity in a sustainable and eco-friendly way. Here, we built a 4-unit MFC and studied the efficiency of MFC at different conditions, including pH, substrate concentration of Vicia faba agricultural wastes with exoelectrogenic bacteria P. aeruginosa. The exoelectrogenic bacteria were obtained from industrial effluents and used to inoculate the MFCs. The optimized conditions in terms of yielding maximum potential of 802 mV, yielding maximum power density of 283 mW m–2 were reported at a substrate concentration of 6 g L–1 of V. faba waste and pH of 5.5, corresponding to a current density 1255.93 mA m–2. Using exoelectrogenic bacteria from industrial effluents and agricultural wastes resulted in efficient MFC. Thus, the developed MFCs using V. faba agricultural wastes can be used in rural areas that have limited access to electricity, by reusing agricultural wastes and concomitant electricity generation. This work is licensed under a Creative Commons Attribution 4.0 International License

    Relationship between microstructure and fracture types in a UNS S32205 duplex stainless steel

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    Duplex stainless steels are susceptible to the formation of sigma phase at high temperature which could potentially be responsible for catastrophic service failure of components. Thermal treatments were applied to duplex stainless steels in order to promote the precipitation of different fractions of sigma phase into a ferrite-austenite microstructure. Quantitative image analysis was employed to characterize the microstructure and Charpy impact tests were used in order to evaluate the mechanical degradation caused by sigma phase presence. The fracture morphology of the Charpy test specimens were thoroughly observed in SEM, looking for a correlation between the microstructure and the fracture types in UNS S32205 duplex stainless steel. The main conclusion is the strong embrittlement effect of sigma phase since it is possible to observe a transition from transgranular fracture to intergranular fracture as increases the percentage of sigma phase. Thus, the mixed modes of fracture are predominant in the present study with high dependence on sigma phase percentages obtained by different thermal treatments

    A photoresponsive graphene oxide-C60 conjugate

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    [EN] An all-carbon donor–acceptor hybrid combining graphene oxide (GO) and C60 has been prepared. Laser flash photolysis measurements revealed the occurrence of photoinduced electron transfer from the GO electron donor to the C60 electron acceptor in the conjugate.This research was financially supported by the Spanish Ministry of Economy and Competitiveness of Spain (CTQ2010-17498, MAT2010-20843-C02-01 and PLE-2009-0038) and a Severo Ochoa operating grant from the Spanish Ministry of Economy and Competitiveness. We also acknowledge financial support from the Spanish Ministry of Economy and Competitiveness, Comunidad de Madrid (CAM 09-S2009_MAT-1467), Generalitat Valenciana (PROMETEO program), and VLC/Campus Microcluster "Nanomateriales Funcionales y Nanodispositivos".Barrejón, M.; Vizuete, M.; Gómez Escalonilla, M.; Fierro, J.; Berlanga, I.; Zamora, F.; Abellán, G.... (2014). A photoresponsive graphene oxide-C60 conjugate. Chemical Communications. 50(65):9053-9055. doi:10.1039/C3CC49589BS90539055506

    Reuse of terminological resources for efficient ontological engineering in Life Sciences

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    This paper is intended to explore how to use terminological resources for ontology engineering. Nowadays there are several biomedical ontologies describing overlapping domains, but there is not a clear correspondence between the concepts that are supposed to be equivalent or just similar. These resources are quite precious but their integration and further development are expensive. Terminologies may support the ontological development in several stages of the lifecycle of the ontology; e.g. ontology integration. In this paper we investigate the use of terminological resources during the ontology lifecycle. We claim that the proper creation and use of a shared thesaurus is a cornerstone for the successful application of the Semantic Web technology within life sciences. Moreover, we have applied our approach to a real scenario, the Health-e-Child (HeC) project, and we have evaluated the impact of filtering and re-organizing several resources. As a result, we have created a reference thesaurus for this project, named HeCTh

    An ontological framework for cooperative games

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    Social intelligence is an emerging property of a system composed of agents that consists of the ability of this system to conceive, design, implement and execute strategies to solve problems and thus achieve a collective state of the system that is concurrently satisfactory for all and each one of the agents that compose it. In order to make decisions when dealing with complex problems related to social systems and take advantage of social intelligence, cooperative games theory constitutes the standard theoretical framework. In the present work, an ontological framework for cooperative games modeling and simulation is presented

    HIGIENE EN INSTALACIONES Y MANIPULACIÓN DE ALIMENTOS EN OCHO ORFANATOS DEL MUNICIPIO DE TORREÓN, COAHUILA (MEXICO)

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    Se realizó un estudio descriptivo transversal en 8 orfanatos de Torreón, México, para evaluar la higiene de la manipulación de alimentos y de de las instalaciones. Se visitaron los albergues y se formularon una serie de preguntas al personal directivo del centro, al personal de mantenimiento, y al personal de cocina.Posteriormente se realizó la inspección de las instalaciones. Los resultados del estudio mostraron que las condiciones higiénicas en la preparación de los alimentos, son deficientes en la mayoría de los orfanatos. Las condiciones de higiene y sanidad de las instalaciones variaron considerablemente entre las casas hogar, dependiendo del grado de compromiso de los trabajadores, de la antigüedad de los edificios y de los presupuestos económicos de las instituciones. Es necesario llevar a cabo acciones de capacitación en los trabajadores encaminadas a crear conciencia de la importancia de la higiene en la salud de los niños.Palabras clave: orfanatos, preparación higiénica de alimentos, sanidad e higiene de las instalacionesorphanages, sanitary and hygienic conditions, meal preparation, state of hygien

    The Mind’s Eye on Personal Profiles: A Cognitive Perspective on Profile Elements that Inform Initial Trustworthiness Assessments in Virtual Project Teams

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    Rusman, E., Van Bruggen, J., Sloep, P., Valcke, M., & Koper, R. (2013). The Mind’s Eye on Personal Profiles: A Cognitive Perspective on Profile Elements that Inform Initial Trustworthiness Assessments and Social Awareness in Virtual Project Teams. Computer Supported Cooperative Work (CSCW), 22(2-3), 159-179.Collaboration in virtual project teams heavily relies on interpersonal trust, for which perceived trustworthiness is an important determinant. This study provides insight in the information that trustors value to assess a trustee’s professional trustworthiness in the initial phase of a virtual project team. We expect trustors in virtual teams to value those particular information elements that provide them with relevant cues of trust warranting properties of a trustee. We identified a list of commonly highly valued information elements to inform trustworthiness assessments (n=226). We then analysed explanations for preferences with the help of a theory-grounded coding scheme. Results show that respondents value those particular information elements that provide them with multiple cues to assess the trustworthiness of a trustee. This enables them to become aware of and assess the trustworthiness of another. Information elements that provide unique cues could not be identified. Insight in these information preferences can inform the design of artefacts, such as personal profile templates, to support acquaintanceships in the initial phase of a virtual project team
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