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Nou a UPCommons

Identificación de la estructura urbana del Algarve (Portugal) mediante el valor de interacción

RSS Revistes i Congressos UPC - Tue, 01/10/2013 - 02:00
Title: Identificación de la estructura urbana del Algarve (Portugal) mediante el valor de interacción Authors: Moix Bergadà, Montserrat; Faria de Deus, Raquel; Roca Cladera, Josep; Tenedorio, José Antonio Abstract: Muchos estudios tienen como referencia la ciudad, analizándola y comparándola desde diferentes perspectivas y para multitud de finalidades. La división administrativa, propia de cada territorio, sirve generalmente de unidad de partida, sin cuestionar el ámbito que abarcan las ciudades reales, su área de influencia, su estructura interna... lo cual dificulta la comparación entre realidades urbanas de distintos territorios, acentuándose cuando se trata de diferentes países. Aunque la metodología desarrollada a partir del Valor de Interacción permite delimitar la estructura urbana mediante las relaciones funcionales que se establecen entre el mercado de trabajo y el de residencia, la necesidad de obtener la escala local o urbana exige disponer de la matriz de movilidad obligada por trabajo para unidades administrativas pequeñas (el ámbito local). En el caso de Portugal los municipios, concelhos, son muy extensos y aunque existe una división inframunicipal, la freguesia, el Censo sólo registra los desplazamientos entre freguesia de residencia y concelho de trabajo. Así, este trabajo propone identificar el sistema urbano del distrito de Faro de Portugal a partir de las freguesias, estimando para ello los flujos originados por la movilidad obligada por trabajo entre estas entidades inframunicipales.
Categories: Nou a UPCommons

Efficient margin adaptive scheduling for MIMO-OFDMA systems

RSS E-prints UPC - 2 min 34 sec ago
Title: Efficient margin adaptive scheduling for MIMO-OFDMA systems Authors: Moretti, Marco; Pérez Neira, Ana Isabel Abstract: In this paper we address the problem of margin adaptive scheduling in the downlink of an orthogonal frequency division multiple access (OFDMA) multiple-input multiple-output (MIMO) system. Optimal resource allocation in MIMO systems requires the joint optimization of: a) linear transmit and receive spatial filters, b) channel assignment and c) power allocation. This problem is not convex and its complexity becomes thus intractable already for small sets of users and subcarriers. To reduce the complexity of the problem at hand, we propose a novel heuristic strategy that partitions the users in different groups according to their average channel quality and addresses the original problem by solving a succession of lower-complexity allocation problems. The spatial dimension is employed to prevent multiple access interference from hindering the performance of the sequential allocation. To further reduce the complexity burden we introduce a linear programming formulation in combination with a waterfilling-based strategy to allocate channels and power to the groups of users. Numerical results and evaluation of the computational complexity show that, though suboptimal, in most cases the proposed algorithm manages to exploit in an original way the inherent multi-user diversity of multi-carrier systems to ease the task of resource allocation with a very limited performance loss from the theoretic optimum.
Categories: Nou a UPCommons

Rehabilitación energética de edificios escolares en clima mediterráneo: caso de estudio, Barcelona

RSS E-prints UPC - 2 min 34 sec ago
Title: Rehabilitación energética de edificios escolares en clima mediterráneo: caso de estudio, Barcelona Authors: Bosch González, Montserrat; Rodríguez Cantalapiedra, Inma; Álvarez del Castillo, Javier Abstract: necesidad de reducir el consumo energético se hace cada día más evidente, especialmente en Europa debido a su situación de dependencia energética de países externos a la Unión y también por razones relacionadas con el impacto ambiental y las emisiones asociadas. En este contexto, la rehabilitación energética de edificios es una línea de trabajo prioritaria que actúa sobre el parque edificado, y los edificios públicos deben ser un modelo o ejemplo para impulsar este tipo de actuaciones. Los centros docentes, con un potencial de ahorro muy importante y con unos consumos energéticos asociados básicamente a dos grandes conceptos, la iluminación y la climatización, pueden considerarse como un laboratorio de investigación en cuanto a eficiencia energética. A partir de las experiencias adquiridas durante más de 10 años se ha desarrollado una metodología de análisis para la intervención en edificios docentes en Barcelona con los siguientes objetivos: definir los indicadores estratégicos para identificar las oportunidades de ahorro, evaluar las posibles medidas de reducción de consumos a partir de la limitación de la demanda, analizar y dar contenido al papel de cada uno de los actores que intervienen en las estrategias de uso y gestión de los edificios escolares y establecer los criterios que deben considerarse para realizar las futuras intervenciones de rehabilitación energética. El método, como manera de pensar ordenadamente, ha de permitir optimizar los recursos y descubrir les rutas de trabajo que nos conduzcan al objetivo final: reducir el consumo energético del parque edificado
Categories: Nou a UPCommons

Performance assessment & synergic operation of algorithmic solutions enabling opportunistic networks– D4.2

RSS E-prints UPC - 2 min 34 sec ago
Title: Performance assessment & synergic operation of algorithmic solutions enabling opportunistic networks– D4.2 Authors: Demestichas, Panagiotis; Pérez Romero, Jordi; Sallent Roig, José Oriol; Bouali, Faouzi; Ferrús Ferré, Ramón Antonio; Karvounas, Dimitrios; Georgakopoulos, Andreas; Stavroulaki, Vera; Tsagkaris, Kostas; Riaz, Maryam; Bourdellès, Michel; Vahid, Seiamak; Gebert, Jens; Fuchs, Rolf; Moreno, Oscar; Matinmikko, Marja; Sarvanko, Heli; Boskovic, Dragan; Tosic, M.; Alnwaimi, Ghassan; Rakotoharison, Lanto; Panaitopol, Dorin; Bagayoko, Abdoulaye; Mouton, Christian; Lee, Haeyoung; Shariat, Shahin Abstract: Deliverable D4.2 del projecte europeu OneFIT
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Informe socio-residencial del barrio centro de Fuenlabrada

RSS E-prints UPC - 2 min 34 sec ago
Title: Informe socio-residencial del barrio centro de Fuenlabrada Authors: Garcia-Almirall, M. Pilar Abstract: INFORME SOCIO-RESIDENCIAL DEL BARRIO CENTRO DE FUENLABRADA
Categories: Nou a UPCommons

MEET: Motif Elements Estimation Toolki

RSS E-prints UPC - 2 min 34 sec ago
Title: MEET: Motif Elements Estimation Toolki Authors: Pairó Castiñeira, Erola; Maynou Fernández, Joan; Vallverdú Ferrer, Montserrat; Gallardo Chacón, Joan Josep; Caminal Magrans, Pere; Marco Colás, Santiago; Perera Lluna, Alexandre Abstract: MEET (Motif Elements Estimation Toolkit) es un paquete en R que integra un conjunto de algoritmos para la detección computacional de los puntos de unión de los factores de transcripción (TFBS). El paquete en R MEET incluye cinco programas de búsqueda de motivos: MEME/MAST (Multiple Expectation-Maximization for Motif Elicitation), Q-residuals, MDscan (Motif Discovery scan), ITEME (Information Theory Elements for Motif Estimation) y Match. Además, permite al usuario trabajar con diferentes algoritmos de alineamiento múltiple: MUSCLE (Multiple Sequence Comparison by Log-Expectation), ClustalW y MEME. El paquete puede trabajar en dos modos diferentes, entrenamiento y detección. El modo entrenamiento permite escoger los parámetros óptimos del detector escogido. Y el modo detección permite, una vez escogidos los parámetros, analizar un genoma en busca de puntos de unión. Además, ambos modos pueden combinar los diferentes métodos de alineamiento y de detección, permitiendo al usuario un amplio abanico de posibilidades. Esta característica permite comparar los diferentes métodos computacionales al mismo nivel,sin realizar ningún agravio comparativo debido al alineamiento.
Categories: Nou a UPCommons

El Santuari de Nostra Sra. de la Misericòrdia de Canet de Mar: història i arquitectura

RSS E-prints UPC - 2 min 34 sec ago
Title: El Santuari de Nostra Sra. de la Misericòrdia de Canet de Mar: història i arquitectura Authors: Meca Acosta, Benito; Rosselló i Nicolau, Maribel; Alcalde Vilà, Sergi Abstract: El Santuari de Nostra Sra. de la Misericòrdia de Canet de Mar: història i arquitectura
Categories: Nou a UPCommons

Poster CONSTRUMAT Start-up Panel

RSS E-prints UPC - 2 min 34 sec ago
Title: Poster CONSTRUMAT Start-up Panel Authors: Burns, Malcolm Abstract: Poster CONSTRUMAT Start-up Panel
Categories: Nou a UPCommons

Wahrnehmung des Raumes : Malerei um 1800

RSS E-prints UPC - 2 min 34 sec ago
Title: Wahrnehmung des Raumes : Malerei um 1800 Authors: Usandizaga Calparsoro, Miguel M.
Categories: Nou a UPCommons

Literature revision_Agent-based models

RSS E-prints UPC - 2 min 34 sec ago
Title: Literature revision_Agent-based models Authors: Chica Mejía, Juan Eduardo Abstract: Literature revision_Agent-based models
Categories: Nou a UPCommons

Modelling shoreline sand waves: application to the coast of Namibia

RSS E-prints UPC - 2 min 34 sec ago
Title: Modelling shoreline sand waves: application to the coast of Namibia Authors: Falqués Serra, Albert; Van den Berg, Niels; Ribas Prats, Francesca; Caballeria Suriñach, Miquel Abstract: The SW coast of Africa (Namibia and part of Angola) features very long sandy beaches and a wave climate dominated by energetic swells from the SSW, therefore approaching the coast with a very high obliquity. Satellite images reveal that along that coast there are many shoreline sand waves with wavelengths ranging from 2 to 8 km. A more detailed study, including a Fourier analysis of the shoreline position, confirms a high spectral density concentration at these lengths scales. Also, it becomes apparent that at least some of the sand waves are dynamically active rather than being controlled by the geological setting. A morphodynamic model is used to test the hypothesis that these sand waves could emerge as free morphodynamic instabilities of the coastline due to the obliquity in wave incidence. It is found that the wave period, Tp, is crucial to establish the tendency to stability or instability, instability increasing for decreasing period, whilst there is some discrepancy in the observed periods. Model results for Tp = 7 s clearly show the tendency for the coast to develop free sand waves at 2 km wavelength within a few years, which migrate to the north at rates of 0.6-0.7 km/yr. For Tp = 8 s, instability is weaker and rather sensitive to other factors as the underlying bathymetry. In this case, the coast seems to be nearly at neutral stability so that sand waves originated from other mechanisms can propagate downdrift with little decay.
Categories: Nou a UPCommons

Delimitación de los sistemas urbanos de la costa ibérica: España y Algarve (Portugal)

RSS E-prints UPC - 2 min 34 sec ago
Title: Delimitación de los sistemas urbanos de la costa ibérica: España y Algarve (Portugal) Authors: Moix Bergadà, Montserrat Abstract: DELIMITACIÓN DE LOS SISTEMAS URBANOS DE LA COSTA IBÉRICA: ESPAÑA Y ALGARVE (PORTUGAL)
Categories: Nou a UPCommons

Dictamen técnico estructural

RSS E-prints UPC - 2 min 34 sec ago
Title: Dictamen técnico estructural Authors: Muñoz Salinas, Francisco Abstract: Dictamen estructural para determinar el estado de la estructura de un edificio y si ella pudo ser la causa de unas supuestas patologías en el edificio de viviendas plurifamiliar ubicado en la calle GERMANS THOS Y CODINA nº 6 de Mataró en la provincia de Barcelona, España.
Categories: Nou a UPCommons

Chloride corrosion of embedded reinforced steel on concrete elaborated from recycled coarse aggregates and supplementary cement materials

RSS E-prints UPC - 1 hour 28 min ago
Title: Chloride corrosion of embedded reinforced steel on concrete elaborated from recycled coarse aggregates and supplementary cement materials Authors: Corral Higuera, Ramón; Arredondo Rea, Susana Paola; Almaral Sánchez, Jorge Luis; Gómez Soberón, José Manuel Vicente Abstract: As a result of contributive and sustainable strategies on concrete industry, researches are presently being developed, which are focused on improving durability of reinforced concrete structures as well as partially or completely replacing their components by recycled materials. In the case of steel bars, corrosion is considered as the major durability menace to reinforced concrete. The present research employed coarse aggregate from recycled concrete and supplementary cement materials, which are byproducts of industrial processes, such as fly ashes and silica fume, for the elaboration of sustainable concretes and for the evaluation of their behavior faced to chlorides exposure. Compressive resistance, electric resistivity, loading transfer resistance and ion chloride permeability resistance are the parameters which were determined from the resulting test specimens, thus specifying the minimum required properties for concrete, in accordance with regulations that guarantee its durability faced to chloride actions. From results obtained it is concluded that concrete elaborated using a 100% of recycled coarse aggregate and supplementary cement materials improves its behavior as far as resistance and durability are concerned, in comparison to conventional concrete.
Categories: Nou a UPCommons

Unexpected differences between thermal and photoinitiated cationic curing oa a diglycidyl ether of bisphenol. A modified with a multiarm star poly (styrene)-b-poly (e-caprolactone) polymer

RSS E-prints UPC - 1 hour 34 min ago
Title: Unexpected differences between thermal and photoinitiated cationic curing oa a diglycidyl ether of bisphenol. A modified with a multiarm star poly (styrene)-b-poly (e-caprolactone) polymer Authors: Morancho Llena, José María; Cadenato Matia, Ana María; Ramis Juan, Xavier; Morell, Mireia; Fernández Francos, Xavier; Salla Tarragó, José María; Serra, Àngels Abstract: The effect of adding a multiarm star poly(styrene)-b-poly("-caprolactone) polymer on the cationic thermal and photoinitiated curing of diglycidyl ether of bisphenol A was studied. This star-polymer decelerated the thermal curing of diglycidyl ether of bisphenol A and modified the final structure of the epoxy matrix. The photocuring was influenced significantly by the addition of the multiarm star. When the proportion of this modifier added was 5%, much more time was necessary for complete photocuring (160 min at 40ºC). In the presence of 10% of modifier, the degree of photocuring reached was very low (0.196 at 120°C). A subsequent thermal post-curing was necessary to cure completely the system. During photocuring in presence of poly(styrene)-b-poly("-caprolactone), the formation of dormant species, which are reactivated when the temperature increases, takes places. The kinetics of the thermal curing and the photocuring was analyzed using an isoconversional method due to the complexity of the reactive process. Applying this method, it has been confirmed the dependence of activation energy on the degree of conversion. The fracture morphology analyzed by scanning electron microscopy exhibited a second phase originated during photocuring by the presence of the modifier.
Categories: Nou a UPCommons

A summary of virtualization techniques

RSS E-prints UPC - 2 hours 8 min ago
Title: A summary of virtualization techniques Authors: Rodríguez Haro, Fernando; Freitag, Fèlix; Navarro Moldes, Leandro; Hernández Sánchez, Efraín; Farías Mendoza, Nicandro; Guerrero Ibañez, Juan Antonio; González Potes, Apolinar Abstract: Nowadays, virtualization is a technology that is applied for sharing the capabilities of physical computers by splitting the resources among OSs. The concept of Virtual Machines (VMs) started back in 1964 with a IBM project called CP/CMS system. Currently, there are several virtualization techniques that can be used for supporting the execution of entire operating systems. We classify the virtualization techniques from the OS view. First, we discuss two techniques that executes modified guest OSs: operating system-level virtualization and para-virtualization. Second, we discuss two techniques that executes unmodified guest OSs: binary translation and hardware assisted. Finally, we present a summary of resource management facilities for capacity planning and consolidation of server applications.
Categories: Nou a UPCommons

Designing national IP/MPLS networks with flexgrid optical technology

RSS E-prints UPC - 4 hours 17 min ago
Title: Designing national IP/MPLS networks with flexgrid optical technology Authors: Velasco Esteban, Luis Domingo; Wright, Paul; Lord, Andrew; Junyent Giralt, Gabriel Abstract: We propose a two-step procedure to design flexgrid-based national networks. Locations are first partitioned into a set of metro areas interconnected through a flexgrid optical network. Next, each network is designed separately. Optimal results show a future large (>200 nodes) flexgrid core network inter-connecting small (~10 nodes) metro regions.
Categories: Nou a UPCommons

BoVDW: Bag-of-Visual-and-Depth-Words for gesture recognition

RSS E-prints UPC - 4 hours 54 min ago
Title: BoVDW: Bag-of-Visual-and-Depth-Words for gesture recognition Authors: Hernandez Vela, Antonio; Bautista, Miguel Angel; Perez-Sala, Xavier; Ponce, Víctor; Baró, Xavier; Pujol, Oriol; Angulo Bahón, Cecilio; Escalera, Sergio Abstract: We present a Bag-of-Visual-and-Depth-Words (BoVDW) model for gesture recognition, an extension of the Bag-of-Visual-Words (BoVW) model, that benefits from the multimodal fusion of visual and depth features. State-of-the-art RGB and depth features, including a new proposed depth descriptor, are analysed and combined in a late fusion fashion. The method is integrated in a continuous gesture recognition pipeline, where Dynamic Time Warping (DTW) algorithm is used to perform prior segmentation of gestures. Results of the method in public data sets, within our gesture recognition pipeline, show better performance in comparison to a standard BoVW model.
Categories: Nou a UPCommons

A MILP model to design hybrid wind-photovoltaic isolated rural electrification projects in developing countries

RSS E-prints UPC - 6 hours 2 min ago
Title: A MILP model to design hybrid wind-photovoltaic isolated rural electrification projects in developing countries Authors: Ferrer Martí, Laia; Domenech Lega, Bruno; García Villoria, Alberto; Pastor Moreno, Rafael Abstract: Electrification systems based on the use of renewable energy sources are a suitable option for providing electricity to isolated communities autonomously. Wind and hybrid wind–photovoltaic (PV) systems are increasingly getting attention. To electrify scattered communities, designs that combine individual systems and microgrids have recently proven advantageous. In this paper we present a mathematical programming model to optimize the design of hybrid wind–PV systems that solves the location of the wind–PV generators and the design of the microgrids, taking into account the demand of the consumption points and the energy potential. The criterion is the minimization of the initial investment cost required to meet the demand. The proposed hybrid model is tested with realistic size instances and results show the instances are efficiently solved. Moreover, the model is applied to real case studies in Peru; obtained results verify that the hybrid model efficiently finds solutions that significantly reduce cost.
Categories: Nou a UPCommons

KHAOS

RSS Treballs acadèmics UPC - 12 hours 23 min ago
Title: KHAOS Authors: Viñado Martínez, Javier Abstract: Memoria del PFM Khaos Autor: Javier Viñado Ponente: Agustín Fernández Director: Oliver Constanso
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  1. Club de Lectura Biblioteca ETSEIB
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    • Inicio: Wednesday, 5 de Junio
    • Hora de inicio: 14:00
    • Hora de finalización: 15:00
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    • Event description: Tertúlia sobre el llibre: Orgull i prejudici de Jane Austen