Now showing items 693-712 of 725

    • Unconventional experimental technologies available for phase change materials (PCM) characterization. Part 1. Thermophysical properties 

      Cabeza, Luisa F.; Barreneche Güerisoli, Camila; Martorell, Ingrid; Miró, Laia; Sari-Bey, Sana; Fois, Magali; Paksoy, Halime Ö.; Sahan, Nurten; Weber, Robert; Constantinescu, Mariaella; Anghel, Elena Maria; Malikova, Marta; Krupa, Igor; Delgado, Mónica; Dolado, Pablo; Furmanski, Piotr; Jaworski, Maciej; Haussmann, Thomas; Gschwander, Stefan; Fernández Renna, Ana Inés (Elsevier, 2015)
      The use of thermal energy storage by phase change materials (PCM) is increasing in interest for building applications. For the deployment of the technology, appropriate characterization of PCM and hybrid PCM is essential, ...
    • Unconventional experimental technologies used for phase change materials (PCM) characterization: part 2 – morphological and structural characterization, physico-chemical stability and mechanical properties 

      Fernández Renna, Ana Inés; Solé, Aran; Giró Paloma, Jessica; Martínez, Mònica; Hadjieva, Mila; Boudenne, Abdel; Constantinescu, Mariaella; Anghel, Elena Maria; Malikova, Marta; Krupa, Igor; Peñalosa, Conchita; Lázaro, Ana; Paksoy, Halime Ö.; Cellat, Kemal; Vecstaudža, Jana; Bajare, Diana; Sumiga, Bostjan; Boh, Bojana; Haussmann, Thomas; Gschwander, Stefan; Weber, Robert; Furmanski, Piotr; Jaworski, Maciej; Cabeza, Luisa F. (Elsevier, 2015)
      Due to the high interest of appropriate characterization of PCM and hybrid PCM composites, different research centres and universities are using several material characterization techniques not commonly used with PCM, to ...
    • Uncovering relationships between environmental metrics in the multi-objective optimization of energy systems: A case study of a thermal solar Rankine reverse osmosis desalination plant 

      Antipova, Ekaterina; Boer, Dieter; Cabeza, Luisa F.; Guillén Gosálbez, Gonzalo; Jiménez Esteller, Laureano (Elsevier, 2013)
      Multi-objective optimization (MOO) is increasingly being used in a wide variety of applications to identify alternatives that balance several criteria. The energy sector is not an exception to this trend. Unfortunately, ...
    • Unified Model for Inflation and Dark Matter 

      Zsembinszki, Gabriel (IOP Publishing, 2007)
      We present a model which contains a new complex scalar field Ψ, interacting with a new real scalar field, χ, and an effective potential whose symmetry is almost exact, being explicitly broken by Planck-scale effects. ...
    • Use of by-products as additives in adobe bricks: Mechanical properties characterisation 

      Serrano, Susana; Barreneche Güerisoli, Camila; Cabeza, Luisa F. (Elsevier, 2016)
      Six by-products are used as additives in adobe bricks to study the variability of mechanical properties by a three level design of experiments and to evaluate optima formulations. Corn plant, fescue, straw, and grounded ...
    • Use of microencapsulated PCM in buildings and the effect of adding awnings 

      Arce Maldonado, Pablo; Castellón, Cecilia; Castell, Albert; Cabeza, Luisa F. (Elsevier, 2012)
      In 2004 the University of Lleida began working on the inclusion and effects of PCM into concrete and performed experiments employing microencapsulated PCM integrated into concrete walls under different configurations ...
    • Use of microencapsulated PCM in concrete walls for energy savings 

      Cabeza, Luisa F.; Castellón, Cecilia; Nogués Aymamí, Miquel; Medrano Martorell, Marc; Leppers, Ron; Zubillaga, Oihana (Elsevier, 2007)
      This paper studies a new innovative concrete with phase change materials (PCM) on thermal aspects. The final objective is to develop a product which would achieve important energy savings in buildings. The work here ...
    • Use of multi-layered PCM gypsums to improve fire response. Physical, thermal and mechanical characterization 

      Serrano, Susana; Barreneche Güerisoli, Camila; Navarro Ezquerra, Antonia; Haurie, Laia; Fernández Renna, Ana Inés; Cabeza, Luisa F. (Elsevier, 2016)
      The building sector is one of the highest energy consumers representing around 30% of total energy use. One of the recommendations of the IEA (International Energy Agency) to reduce energy consumption in buildings is to ...
    • Use of partial load operating conditions for latent thermal energy storage management 

      Gasia, Jaume; Gracia Cuesta, Alvaro de; Peiró Bell-lloch, Gerard; Arena, Simone; Cau, Giorgio; Cabeza, Luisa F. (Elsevier, 2018)
      A proper management of thermal energy storage (TES) charging and discharging processes allows the final users to optimize the performance of TES systems. In this paper, an experimental research is carried out to study how ...
    • Use of PCM-polymer composite dense sheet including EAFD in constructive systems 

      Barreneche Güerisoli, Camila; Navarro, Maria E.; Niubó, Maria; Cabeza, Luisa F.; Fernández Renna, Ana Inés (Elsevier, 2014)
      In recent years, the overall energy consumption is increasing significantly and the energy consumption inthe building sector represents over 30% of the global ones in developed countries. Thermal energy storage(TES) using ...
    • Use of polyethylene glycol for the improvement of the cycling stability of bischofite as thermal energy storage material 

      Gutiérrez, Andrea; Ushak, Svetlana; Galleguillos, Hector; Fernández, Ángel G.; Cabeza, Luisa F.; Grágeda, Mario (Elsevier, 2015)
      Bischofite is a by-product of the non-metallic mining industry. It has been evaluated as phase change material in thermal energy storage, but it shows little cycling stability, therefore in this paper the mixture of ...
    • Use of rubber crumbs as drainage layer in experimental green roofs 

      Vila, Anna; Pérez Luque, Gabriel; Solé Cutrona, Cristian; Fernández Renna, Ana Inés; Cabeza, Luisa F. (Elsevier, 2012)
      Green roofs have become a sustainable construction building system that offers interesting environmental advantages over traditional roofing solutions. However green roofs design is still based on conventional materials. ...
    • Use of rubber crumbs as drainage layer in green roofs as potential energy improvement material 

      Pérez Luque, Gabriel; Vila, Anna; Rincón, Lídia; Solé Cutrona, Cristian; Cabeza, Luisa F. (Elsevier, 2012)
      Today, green roofs are a building system which provides interesting benefits over traditional roof solutions. The most important advantages are the reduction of surface runoff in cities, improvement of the urban climate, ...
    • Use of seagrass fibres in adobe bricks 

      Olacia, Elena; Pisello, Anna Laura; Chiodo, Vitaliano; Maisano, Susanna; Frazzica, Andrea; Cabeza, Luisa F. (IOP Publishing, 2019)
      The main aim of the present study is to measure the capability the 'Posidonia Oceanica' as fibre reinforcement for adobe bricks. This sea-plant is distributed in the Mediterranean coast, considered as a solid marine ...
    • Use of Semantic Tools for a Digital Rights Dictionary 

      Delgado Mercè, Jaime; Gallego, Isabel; García González, Roberto (Springer Verlag, 2004)
      RDDOnto is an ontology that translates the MPEG-21 RDD (Rights Data Dictionary) specification into a hierarchical set of definitions with semantic content included. In the event that this set of definitions is used, ...
    • User-centered design and evaluation of overview components for semantic data exploration 

      Brunetti Fernández, Josep Maria; García González, Roberto (Emerald, 2014)
      Purpose: The growing volumes of semantic data available in the web result in the need for handling the information overload phenomenon. The potential of this amount of data is enormous but in most cases it is very difficult ...
    • Using convolutional neural networks for classification of malware represented as images 

      Gibert Llauradó, Daniel; Mateu Piñol, Carles; Planes Cid, Jordi; Vicens, Ramon (Springer, 2019)
      The number of malicious files detected every year are counted by millions. One of the main reasons for these high volumes of different files is the fact that, in order to evade detection, malware authors add mutation. This ...
    • Using On-the-Fly Simulation for Estimating the Turnaround Time on Non-dedicated Clusters 

      Hanzich, Mauricio; Lérida Monsó, Josep Lluís; Torchinsky, Matias; Giné, Francesc; Hernández Budé, Porfidio; Luque, Emilio (Springer Verlag, 2006)
      The computation capacity of the workstations of an open laboratory in almost every university is enough to execute not only the local workload but some distributed computation. Unfortunately, the local workload introduces ...
    • Using SWET-QUM to Compare the Quality in Use of Semantic Web Exploration Tools 

      González Sánchez, José Luis; García González, Roberto; Brunetti Fernández, Josep Maria; Gil Iranzo, Rosa María; Gimeno Illa, Juan Manuel (Verlag der Technischen Universität Graz, 2013)
      In order to make Semantic Web tools more appealing to lay-users, a key factor is their Quality in Use, the quality of the user experience when interacting with them. To assess and motivate the improvement of the quality ...
    • Using the image acquisition capabilities of the optical mouse sensor to build an absolute rotary encoder 

      Tresánchez Ribes, Marcel; Pallejà Cabrè, Tomàs; Teixidó Cairol, Marcel; Palacín Roca, Jordi (Elsevier, 2010)
      In this paper, the optical mouse sensor is proposed as the main sensor of an absolute rotary encoder. The image acquired by the optical sensor is used to read a positioning binary code printed on an internal rotary surface ...