Enviaments recents

  • Linking data and BPMN processes to achieve executable models 

    Giacomo, Giuseppe De; Oriol Hilari, Xavier; Estañol Lamarca, Montserrat; Teniente López, Ernest (Springer, 2017)
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    We describe a formally well founded approach to link data and processes conceptually, based on adopting UML class diagrams to represent data, and BPMN to represent the process. The UML class diagram together with a set of ...
  • E-assessment of relational database skills by means of LearnSQL 

    Quer Bosor, Maria Carme; Abelló Gamazo, Alberto; Burgués Illa, Xavier; Casany Guerrero, María José; Martín Escofet, Carme; Rodríguez González, M. Elena; Romero Moral, Óscar; Urpí Tubella, Antoni (International Association of Technology, Education and Development (IATED), 2017)
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    LearnSQL is a software system that allows the automatic and efficient e-learning and e-assessment of relational database skills. It has been used at the Barcelona School of Informatics for 18 semesters with an average of ...
  • Aggregating energy flexibilities under constraints 

    Valsomatzis, Emmanouil; Bach Pedersen, Torben; Abelló Gamazo, Alberto; Hose, Katja (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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    The flexibility of individual energy prosumers (producers and/or consumers) has drawn a lot of attention in recent years. Aggregation of such flexibilities provides prosumers with the opportunity to directly participate ...
  • Analysis and operational challenges of dynamic ride sharing demand responsive transportation models 

    Linares Herreros, Mª Paz; Barceló Bugeda, Jaime; Carmona Bautista, Carlos; Montero Mercadé, Lídia (Elsevier, 2016)
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    There is a wide body of evidence that suggests sustainable mobility is not only a technological question, but that automotive technology will be a part of the solution in becoming a necessary albeit insufficient condition. ...
  • Updating DL-Lite ontologies through first-order queries 

    Giacomo, Giuseppe De; Oriol Hilari, Xavier; Rosati, Riccardo; Savo, Domenico Fabio (Springer, 2016)
    Text en actes de congrés
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    In this paper we study instance-level update in DL-LiteA, the description logic underlying the OWL 2 QL standard. In particular we focus on formula-based approaches to ABox insertion and deletion. We show that DL-LiteA, ...
  • H-word: Supporting job scheduling in Hadoop with workload-driven data redistribution 

    Jovanovic, Petar; Romero Moral, Óscar; Calders, Toon; Abelló Gamazo, Alberto (2016)
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    Today’s distributed data processing systems typically follow a query shipping approach and exploit data locality for reducing network traffic. In such systems the distribution of data over the cluster resources plays a ...
  • TINTIN : comprobación incremental de aserciones SQL 

    Oriol Hilari, Xavier; Teniente López, Ernest; Rull, Guillem (2016)
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    Ninguno de los SGBD más populares del momento implementa aserciones SQL, obligando así a implementar manualmente su comprobación. Por ello, presentamos TINTIN: una aplicación que genera automáticamente el código SQL para ...
  • Automated data pre-processing via meta-learning 

    Bilalli, Besim; Abelló Gamazo, Alberto; Aluja Banet, Tomàs; Wrembel, Robert (2016)
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    A data mining algorithm may perform differently on datasets with different characteristics, e.g., it might perform better on a dataset with continuous attributes rather than with categorical attributes, or the other way ...
  • Towards intelligent data analysis : the metadata challenge 

    Bilalli, Besim; Abelló Gamazo, Alberto; Aluja Banet, Tomàs; Wrembel, Robert (2016)
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    Once analyzed correctly, data can yield substantial benefits. The process of analyzing the data and transforming it into knowledge is known as Knowledge Discovery in Databases (KDD). The plethora and subtleties of algorithms ...
  • POIESIS: A tool for quality-aware ETL process redesign 

    Theodorou, Vasileios; Abelló Gamazo, Alberto; Thiele, Maik; Lehner, Wolfgang (2015)
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    We present a tool, called POIESIS, for automatic ETL process enhancement. ETL processes are essential data-centric activities in modern business intelligence environments and they need to be examined through a viewpoint ...

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