Browsing by Author "Alonso, A."
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Item Flows, drivers, services and functions and urban typologies: An integrated approach for the analysis of urban eco-systems(WITPress, 2008) Olazabal, M.; García, I.; García, G.; Abajo, B.; Herranz, K.; Alonso, A.; Feliú, E.; Izaola, B.; Aspuru, I.; Coloma, O. Santa; ADAPTACIÓN AL CAMBIO CLIMÁTICO; CALIDAD Y CONFORT AMBIENTAL; POWERTRAIN; Tecnalia Research & InnovationThe unplanned and non-environmentally integrated growth of cities in the last decades implies problems and challenges related to environmental impacts, life quality, social cohesion and economic capacities and competences. Considering this situation, an integrated management regarding the aforesaid aspects is demanded in urban areas. This requirement has already arisen from the European Commission within the Thematic Strategy on Urban Environment. Furthermore, in May 2007, the European Member States stated so in the Leipzig Charta. INCYDA EMAU is a project partially supported by the Spanish Ministry of Environment which aims to provide an integrated methodology for the assessment of urban system patterns and capacity of response and action with two objectives, a) avoiding the alteration of the ecological, social and economical conditions of the city, and also b) improving them, throughout a process of building new economic and social habits, by means of an urban ecosystem approach. The project encompasses four phases: 1) Characterization and comprehension of urban ecosystems 2) Assessment and diagnosis 3) Identification of critical nodes and 4) Definition of strategic actions. The methodology is being tested as a pilot case from the very early stages of the project. This paper focuses on the characterization phase.Item Improving energy and resource efficiency of electric steelmaking through simulation tools and process data analyses(2016) Colla, V.; Matino, I.; Cirilli, F.; Jochler, G.; Kleimt, B.; Rosemann, H.; Unamuno, I.; Tosato, S.; Gussago, F.; Baragiola, S.; Klung, S.; Penã Quintero, B.; Alonso, A.; De Miranda, U.; PROMETAL; POWERTRAINThe European Steel industry is ever more committed to improve the socio-economic and environmental sustainability of its processes by promoting any development, which can increase resource efficiency and lower the environmental footprint of the steel production. The European Steel Technology Platform gives the highest priority to the topic of Sustainable Steel Production within its Strategic Research Agenda since 2013. Several projects have been developed both at corporate level, as well as by associations of companies and research institutions in order to investigate new processes, retrofit actions and apply innovative combinations of existing technologies that can allow to improve the energy and resource efficiency and the management of by-products, waste and wastewater. However, it is still difficult for process managers and plant engineers to find accessible tools to both analyze the process data and to perform scenario analyses aimed at evaluating in a practical and understandable manner the effect of innovations in terms of new technologies or novel procedures and operative practices. Within the research RFCS project entitled "Environmental Impact Evaluation and Effective Management of Resources in the EAF Steelmaking-EIRES" (where EAF stands for Electric Arc Furnace), an integrated tool has been developed, which allows to evaluate the environmental impact of current operating practices, modified operating conditions and major process variations and innovations, thanks to process simulation models for both production processes and auxiliary equipment. Also a dedicated Life Cycle Assessment (LCA) is linked to the simulation models in order to provide a further evaluation from the specific LCA perspective. The paper is focused on the description of the developed integrated scenario analysis tool, which includes both process modelling and metrics tools, and to depict some examples of its application for process data analyses and scenario simulations.Item Levels and spatial distribution of inorganic and organic contaminants in sediments along the Bilbao estuary(2008-12) Prieto, A.; Zuloaga, O.; Usobiaga, A.; Bartolomé, L.; Fernández, L. A.; Etxebarria, N.; Ciprain, E.; Alonso, A.; MercadoItem On the design of an heuristically optimized multiband spectrum sensing approach for cognitive radio systems(2012) Del Ser, J.; Alonso, A.; Gil-Lopez, S.; Garay, M.; Kretzschmar, U.; Astarloa, A.; IA; FACTORYThis extended abstract outlines a novel optimization approach for multi-band linear collaborative spectrum (LCS) sensing based on harmony search heuristics. Besides, the description of a centralized system architecture is also included in this manuscript, which is capable of processing the captured spectrum measurements from several nodes in a LCS fashion and storing the decisions made on the spectrum occupancy. In particular, the value of the coefficients participating in the LSC sensing technique are optimized based on a maximum throughput criteria. The performance rendered by the heuristics utilized in this work are assessed and compared, through extensive simulations, to those of a state-of-the-art layout instead resorting to a genetically-inspired solver for the aforementioned optimization. This work is currently under development under the funded FP7 project CREW (Cognitive Radio Experimentation World).Item SDR direct-sampling device for multistandard GNSS signals(2008) Alonso, A.; Perre, J. M.; Arizaga, I.; FACTORY; QuantumGNSS systems, especially GPS, have become an essential tool for ubiquitous and mobile applications. Recently, the proliferation of these standards (GPS L2 and L5, Galileo, Glonass) makes the choice of a concrete one a difficult task. On the other hand, a multistandard system may have great advantages for location-aware devices especially regarding universal coverage. Using a SDR approach, the aim of this paper is to reduce the number of hardware components exploring the feasibility of a direct digitization wearable device, which can deal with different standards, concretely (GPS L1, L2 civilian signal & L5, and Galileo E5a, E5b, E6 & L1). A special digital signal processing had to be designed in order to employ a single front end for all the different frequency bands.