Enviaments recents

  • An approach for alert raising in real-time data warehouses 

    López, Maximiliano Ariel; Nadal Francesch, Sergi; Djedaini, Mahfoud; Marcel, Patrick; Peralta, Verónika; Furtado, Pedro (2015)
    Text en actes de congrés
    Accés obert
    This work proposes an approach for alert raising within a real-time data warehouse environment. It is based on the calculation of confidence intervals for measures from historical facts. As new facts arrive to the data ...
  • iStarJSON : a lightweight data-format for i* models 

    Franco Bedoya, Óscar Hernán; Ameller, David; Costal Costa, Dolors; López Cuesta, Lidia (CEUR-WS.org, 2016)
    Text en actes de congrés
    Accés obert
    JSON is one of the most widely used data-interchange format. There is a large number of tools open for modelling with i*. However, none of them provides supporting for JSON. In this paper we propose iStarJSON language, a ...
  • Towards intelligent data analysis : the metadata challenge 

    Bilalli, Besim; Abelló Gamazo, Alberto; Aluja Banet, Tomàs; Wrembel, Robert (2016)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    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 ...
  • A learning analytics tool with hybrid graphical and textual interpretation generation 

    Alier Forment, Marc; Amo Filvà, Daniel; Casany Guerrero, María José; Mayol Sarroca, Enric (Association for Computing Machinery (ACM), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The introduction and use of on-line learning resources has improved students learning process in several aspects. But at the same time, it also introduced more complexity and made more difficult to teachers how to analyze ...
  • POIESIS: A tool for quality-aware ETL process redesign 

    Theodorou, Vasileios; Abelló Gamazo, Alberto; Thiele, Maik; Lehner, Wolfgang (2015)
    Text en actes de congrés
    Accés obert
    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 ...
  • Towards information profiling: data lake content metadata management 

    Al-serafi, Ayman Mounir Mohamed; Abelló Gamazo, Alberto; Romero Moral, Óscar; Calders, Toon (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés obert
    There is currently a burst of Big Data (BD) processed and stored in huge raw data repositories, commonly called Data Lakes (DL). These BD require new techniques of data integration and schema alignment in order to make the ...
  • A machine learning approach for layout inference in spreadsheets 

    Koci, Elvis; Thiele, Maik; Romero Moral, Óscar; Lehner, Wolfgang (SciTePress, 2016)
    Text en actes de congrés
    Accés obert
    Spreadsheet applications are one of the most used tools for content generation and presentation in industry and the Web. In spite of this success, there does not exist a comprehensive approach to automatically extract and ...
  • NOSQL design for analytical workloads: Variability matters 

    Herrero Otal, Víctor; Abelló Gamazo, Alberto; Romero Moral, Óscar (Springer, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Big Data has recently gained popularity and has strongly questioned relational databases as universal storage systems, especially in the presence of analytical workloads. As result, co-relational alternatives, commonly ...
  • Towards exploratory OLAP on linked data 

    Abelló Gamazo, Alberto; Gallinucci, Enrico; Golfarelli, Matteo; Rizzi Bach, Stefano; Romero Moral, Óscar (2016)
    Text en actes de congrés
    Accés obert
    In the context of exploratory OLAP, coupling the information wealth of linked data with the precision and detail of corporate data can greatly improve the effectiveness of the decision-making process. In this paper we ...
  • The death star challenge: an ambitious and motivating engineering project to promote astronautics and transform society's vision about space research 

    Pérez Poch, Antoni; Sánchez Carracedo, Fermín; López Álvarez, David; Alier Forment, Marc (2016)
    Comunicació de congrés
    Accés obert
    The race to put a person on the Moon motivated and captivated the imagination of USA society and the community worldwide. This led to an unprecedented investment in science, technology and the space program, which ...

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