Ara es mostren els items 1979-1998 de 93113

  • A Framework for the evolution of temporal conceptual schemas of information systems (extended version) 

    López-Roldan Otaduy, José R.; Olivé Ramon, Antoni (2000-02)
    Report de recerca
    Accés obert
    This paper focuses on the problem of information systems evolution. Ideally, changes in the requirements of information systems should be defined and managed at the conceptual schema level, with an automatic propagation ...
  • A framework for user-centered declarative ETL 

    Theodorou, Vasileios; Abelló Gamazo, Alberto; Thiele, Maik; Lehner, Wolfgang (2014)
    Text en actes de congrés
    Accés obert
    As business requirements evolve with increasing information density and velocity, there is a growing need for efficiency and automation of Extract-Transform-Load (ETL) processes. Current approaches for the modeling and ...
  • A Framework of hierarchical graphs and its application to the semantics of SRML 

    Mylonakis Pascual, Nicolás; Orejas Valdés, Fernando (2012)
    Report de recerca
    Accés obert
    Hierarchical grapsh or, in general, hierarchical graph structures are needed when describing visual models at different levels of abstraction. This is the case of the semantic model of SRML, the service modeling language ...
  • A Framework proposal for monitoring and evaluating training in ERP implementation project 

    Esteves, José; Pastor Collado, Juan Antonio; Casanovas Garcia, Josep (2003-02)
    Report de recerca
    Accés obert
    During the last years some researchers have studied the topic of critical success factors in ERP implementations, out of which 'training' is cited as one of the most ones. Up to this moment, there is not enough research ...
  • A framework to take account of CO2 restrictions on municipal urban planning 

    Cuchí Burgos, Alberto; Mourao Terra, Joana; Pagès Ramon, Anna (2009)
    Text en actes de congrés
    Accés obert
  • A Free accessible individual-based simulator enabling virtual experiments on soil organic matter processes in classroom 

    Gras Moreu, Anna Maria; Cañadas Lorenzo, Juan Carlos; Ginovart Gisbert, Marta (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013-09)
    Article
    Accés obert
    This work addresses and aims to fulfil a very clear need in teaching biosystem engineering. When introducing students to the complexity of soil processes, one of the frustrations that teachers ofen experience is ...
  • A free boundary problem of codimension two 

    Athanasopoulos, Ioannis (2007-06-18)
    Audiovisual
    Accés obert
    Conferència presentada dins el marc de la GLOBAL School on PDEs: layers and dislocations (Barcelona, UPC, 18-22 juny 2007).
  • A free surface finite element model for low Froude number mould filling problems on fixed meshes 

    Coppola Owen, Ángel H.; Codina, Ramon (2011-07-10)
    Article
    Accés restringit per política de l'editorial
    The simulation of low Froude number mould filling problems on fixed meshes presents significant difficulties. As the Froude number decreases, the coupling between the position of the interface and the resulting flow field ...
  • A free surface model for the numerical simulation of oscillating water column systems 

    Schillaci, Eugenio; Balcázar Arciniega, Néstor; Jofre Cruanyes, Lluís; Lehmkuhl Barba, Oriol; Castro González, Jesús (International Association for Computational Mechanics (IACM), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The aim of this work is to propose and validate a numerical model that represents the hydrodynamic behavior of an Oscillating Water Column (OWC) device, that has been shown to be one of the most promising ways to extract ...
  • A frequency approach on MIMO DSP for optical communication systems 

    Palou Garcia, Xavier (Universitat Politècnica de Catalunya, 2013-02-28)
    Projecte/Treball Final de Carrera
    120 months embargo
    [ANGLÈS] Spatial Division Multiplexing (SDM) has arisen during the last years as the most promising technique to overcome the increasing necessity of capacity of the communication systems while avoiding the theoretical ...
  • A frequency domain approach for controlling chaos in switching converters 

    Rodríguez Vilamitjana, Enric; Alarcón Cot, Eduardo José; Iu, H. H. C.; El Aroudi, Abdelali (2010)
    Text en actes de congrés
    Accés obert
    The purpose of this paper is the synthesis from the frequency domain standpoint of a controller for switching power converters with the aim to eliminate bifurcation and chaotic behavior. Firstly the paper analyzes the ...
  • A frequency independent method for adaptive correction of time interleaved analog to digital converters 

    Bonnetat, Antoine; Hodé, Jean-Miquel; Dallet, Dominique; Ferré, Guillaume (SARTI, 2013)
    Article
    Accés obert
  • A frequency reconfigurable cell for beam-scanning reflectarrays 

    Rodrigo López, Daniel; Jofre Roca, Lluís; Perruisseau Carrier, Julien (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Reflectarray antennas are excellent candidates for beam-scanning applications thanks to their low loss, light and quasi-planar structure and ease of electronic control. However, reflectarray antennas suffer from narrower ...
  • A freshmen mentoring program at the Universitat Politècnica de València over the period 2000-2010 

    Barrachina, Xavier; Conejero, J. Alberto; García Félix, Eloína (School of Industrial and Aeronautic Engineering of Terrassa (ETSEIAT). Universitat Politècnica de Catalunya (UPC), 2011-04)
    Article
    Accés obert
    Purpose: We quantify the dedication of mentors and mentees in a double-mentor program for freshmen. We also analyze the fulfillment of the expectations of all the participants and the utility of each mentor during the ...
  • A friction-model-based framework for reinforcement learning of robotic tasks in non-rigid environments 

    Colomé Figueras, Adrià; Planells Valencia, Antoni; Torras, Carme (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Text en actes de congrés
    Accés obert
    Learning motion tasks in a real environment with deformable objects requires not only a Reinforcement Learning (RL) algorithm, but also a good motion characterization, a preferably compliant robot controller, and an agent ...
  • A full FPGA-based implementation of an adaptive digital predistorter 

    Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bertran Albertí, Eduardo (University California San Diego, 2009)
    Text en actes de congrés
    Accés obert
  • A full year evaluation of the CALIOPE-EU air quality modeling system over Europe for 2004 

    Baldasano Recio, José María; Pay Pérez, M. Teresa; Piot, Matthias; Jorba Casellas, Oriol; Gassó Domingo, Santiago; Gonçalves Ageitos, María; Basart, S.; Dabdubd, D.; Jiménez Guerrero, Pedro (2010-09-01)
    Article
    Accés restringit per política de l'editorial
    The CALIOPE-EU high-resolution air quality modeling system, namely WRF-ARW/HERMES-EMEP/CMAQ/ BSC-DREAM8b, is developed and applied to Europe (12 km 12 km, 1 h). The model performances are tested in terms of air quality ...
  • A fully coupled elastic–plastic hydromechanical model for compacted soils accounting for clay activity 

    Della Vecchia, G.; Romero Morales, Enrique Edgar; Jommi, Cristina (2012-01-11)
    Article
    Accés restringit per política de l'editorial
    A constitutive model, accounting for multiphase and multiscale coupling, is proposed for the water retention domain and the stress–strain response of compacted clayey soils. The model is based on a conceptual interpretation ...
  • A fully parameterizable low power design of vector fused multiply-add using active clock-gating techniques 

    Ratkovic, Ivan; Palomar, Oscar; Stanic, Milan; Unsal, Osman Sabri; Cristal Kestelman, Adrián; Valero Cortés, Mateo (Association for Computing Machinery (ACM), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The need for power-efficiency is driving a rethink of design decisions in processor architectures. While vector processors succeeded in the high-performance market in the past, they need a re-tailoring for the mobile market ...
  • A Fully syntactic AC-RPO 

    Rubio Gimeno, Alberto (1998-02-01)
    Report de recerca
    Accés obert
    We present the first fully syntactic (i.e., non-interpretation-based) AC-compatible recursive path ordering (RPO). It is very simple, and hence easy to implement, and its behaviour is intuitive as in the standard RPO. ...