Ara es mostren els items 1-20 de 82

  • Adaptació d'assignatures de bases de dades a l'EEES 

    Martín Escofet, Carme; Abelló Gamazo, Alberto; Burgués Illa, Xavier; Casany Guerrero, María José; Quer Bosor, Maria Carme; Rodríguez González, María Elena; Urpí Tubella, Antoni (2010)
    Text en actes de congrés
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    Els canvis recents en els plans d'estudis de la UPC i la UOC tenen en compte el nou espai europeu d'educació superior (EEES). Una de les conseqüències directes d'aquests canvis és la necessitat d'afitar i optimitzar el ...
  • Adapting LEARN-SQL to database computer supported cooperative learning 

    Burgués Illa, Xavier; Martín Escofet, Carme; Quer Bosor, Maria Carme; Abelló Gamazo, Alberto; Casany Guerrero, María José; Urpí Tubella, Antoni; Rodríguez González, María Elena (2010)
    Text en actes de congrés
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    LEARN-SQL is a tool that we are using since three years ago in several database courses, and that has shown its positive effects in the learning of different database issues. This tool allows proposing remote questionnaires ...
  • A Data-driven approach to improve the process of data-intensive API creation and evolution 

    Abelló Gamazo, Alberto; Ayala Martínez, Claudia Patricia; Farré Tost, Carles; Gómez Seoane, Cristina; Oriol Hilari, Marc; Romero Moral, Óscar (CEUR-WS.org, 2017)
    Text en actes de congrés
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    The market of data-intensive Application Programming Interfaces (APIs) has recently experienced an exponential growth, but the creation and evolution of such APIs is still done ad-hoc, with little automated support and ...
  • A framework for multidimensional design of data warehouses from ontologies 

    Romero Moral, Óscar; Abelló Gamazo, Alberto (2009-07)
    Report de recerca
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    Some research efforts have proposed the automation of the data warehouse design in order to free this task of being (completely) performed by an expert and facilitate the whole process. Most advanced approaches exclusively ...
  • A framework for user-centered declarative ETL 

    Theodorou, Vasileios; Abelló Gamazo, Alberto; Thiele, Maik; Lehner, Wolfgang (2014)
    Text en actes de congrés
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    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 ...
  • 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 ...
  • An integration-oriented ontology to govern evolution in big data ecosystems 

    Nadal Francesch, Sergi; Romero Moral, Óscar; Abelló Gamazo, Alberto; Vassiliadis, Panos; Vansummeren, Stijn (CEUR-WS.org, 2017)
    Comunicació de congrés
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    Big Data architectures allow to flexibly store and process heterogeneous data, from multiple sources, in its original format. The structure of those data, commonly supplied by means of REST APIs, is continuously evolving, ...
  • An integration-oriented ontology to govern evolution in big data ecosystems 

    Nadal Francesch, Sergi; Romero Moral, Óscar; Abelló Gamazo, Alberto; Vassiliadis, Panos; Vansummeren, Stijn (2019-01)
    Article
    Accés restringit per política de l'editorial
    Big Data architectures allow to flexibly store and process heterogeneous data, from multiple sources, in their original format. The structure of those data, commonly supplied by means of REST APIs, is continuously evolving. ...
  • Approximating the DTD of a set of XML documents 

    Abelló Gamazo, Alberto; Palol Arregui, Xavier de; Hacid, Mohand-Saïd (2005-03)
    Report de recerca
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    The WWW contains a huge amount of documents. Some of them share the subject, but are generated by different people or even organizations. To guarantee the interchange of such documents, we can use XML. This allows to share ...
  • Approximating the schema of a set of documents by means of resemblance 

    Abelló Gamazo, Alberto; Palol, Xavier de; Hacid, Mohand-Saïd (Springer, 2018-06-02)
    Article
    Accés restringit per política de l'editorial
    The WWW contains a huge amount of documents. Some of them share the same subject, but are generated by different people or even by different organizations. A semi-structured model allows to share documents that do not have ...
  • A requirement-driven approach to the design and evolution of data warehouses 

    Jovanovic, Petar; Romero Moral, Óscar; Simitsis, Alkis; Abelló Gamazo, Alberto; Mayorova, Daria (2014-08-01)
    Article
    Accés restringit per política de l'editorial
    Designing data warehouse (DW) systems in highly dynamic enterprise environments is not an easy task. At each moment, the multidimensional (MD) schema needs to satisfy the set of information requirements posed by the business ...
  • A software reference architecture for semantic-aware big data systems 

    Nadal Francesch, Sergi; Herrero Otal, Víctor; Romero Moral, Óscar; Abelló Gamazo, Alberto; Franch Gutiérrez, Javier; Vansummeren, Stijn; Valerio, Danilo (2016-06-13)
    Article
    Accés obert
    Context: Big Data systems are a class of software systems that ingest, store, process and serve massive amounts of heterogeneous data, from multiple sources. Despite their undisputed impact in current society, their ...
  • A software tool for e-assessment of relational database skills 

    Abelló Gamazo, Alberto; Burgués Illa, Xavier; Casany Guerrero, María José; Martín Escofet, Carme; Quer Bosor, Maria Carme; Rodríguez González, M. Elena; Romero Moral, Óscar; Urpí Tubella, Antoni (Tempus Publications, 2016-01-01)
    Article
    Accés restringit per política de l'editorial
    The objective of this paper is to present a software tool for the e-assessment of relational database skills. The tool is referred to as LearnSQL (Learning Environment for Automatic Rating of Notions of SQL). LearnSQL is ...
  • A unified view of data-intensive flows in business intelligence systems : a survey 

    Jovanovic, Petar; Romero Moral, Óscar; Abelló Gamazo, Alberto (2016-12)
    Article
    Accés obert
    Data-intensive flows are central processes in today’s business intelligence (BI) systems, deploying different technologies to deliver data, from a multitude of data sources, in user-preferred and analysis-ready formats. ...
  • Automated data pre-processing via meta-learning 

    Bilalli, Besim; Abelló Gamazo, Alberto; Aluja Banet, Tomàs; Wrembel, Robert (2016)
    Text en actes de congrés
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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 ...
  • Automatic multidimensional design of data warehouses from requirements 

    Romero Moral, Óscar; Abelló Gamazo, Alberto (2009-07)
    Report de recerca
    Accés obert
    The ideal scenario to derive the multidimensional conceptual schema of a data warehouse would entail a hybrid approach (i.e. a combined data-driven and requirement-driven approach). Thus, the resulting multidimensional ...
  • Avaluació de la incorporació d'activitats d'aprenentatge actiu i cooperatiu a les assignatures de bases de dades de la Facultat d'Informàtica de Barcelona. 

    Martín Escofet, Carme; Urpí Tubella, Antoni; Abelló Gamazo, Alberto; Burgués Illa, Xavier; Casany Guerrero, María José; Quer Bosor, Maria Carme; Rodríguez González, María Elena (2012)
    Text en actes de congrés
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    Una de les idees principals del canvi al nou Espai Europeu d'Educació Superior és que les assignatures no es redueixin simplement a un conjunt de classes magistrals, sinó que les classes incorporin activitats d'aprenentatge ...
  • Big data design 

    Abelló Gamazo, Alberto (Association for Computing Machinery (ACM), 2015)
    Text en actes de congrés
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    It is widely accepted today that Relational databases are not appropriate in highly distributed shared-nothing archi- tectures of commodity hardware, that need to handle poorly structured heterogeneous data. ...
  • Big data management challenges in SUPERSEDE 

    Nadal Francesch, Sergi; Abelló Gamazo, Alberto; Romero Moral, Óscar; Varga, Jovan (CEUR-WS.org, 2017)
    Text en actes de congrés
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    The H2020 SUPERSEDE (www.supersede.eu) project aims to support decision-making in the evolution and adaptation of software services and applications by exploiting end-user feedback and runtime data, with the overall goal ...
  • Bijoux : data generator for evaluating ETL process quality 

    Nakuçi, Emona; Theodorou, Vasileios; Jovanovic, Petar; Abelló Gamazo, Alberto (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Obtaining the right set of data for evaluating the fulfillment of different quality standards in the extract-transform-load (ETL) process design is rather challenging. First, the real data might be out of reach due to ...