Now showing items 21-40 of 102

    • 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, Carme; Rodríguez González, María Elena (2012)
      Conference report
      Open Access
      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 ...
    • BASES DE DADES (Examen 2n quadrim) 

      Abelló Gamazo, Alberto (Universitat Politècnica de Catalunya, 2009-07-01)
      Exam
      Restricted access to the UPC academic community
    • BASES DE DADES (Examen 2n quadrim) 

      Abelló Gamazo, Alberto (Universitat Politècnica de Catalunya, 2009-03-24)
      Exam
      Restricted access to the UPC academic community
    • BASES DE DADES (Examen 2n quadrim) 

      Abelló Gamazo, Alberto (Universitat Politècnica de Catalunya, 2009-05-29)
      Exam
      Restricted access to the UPC academic community
    • Big data design 

      Abelló Gamazo, Alberto (Association for Computing Machinery (ACM), 2015)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • Classification of changes in API evolution 

      Koçi, Rediana; Franch Gutiérrez, Javier; Jovanovic, Petar; Abelló Gamazo, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Open Access
      Applications typically communicate with each other, accessing and exposing data and features by using Application Programming Interfaces (APIs). Even though API consumers expect APIs to be steady and well established, APIs ...
    • CORBA: a middleware for an heterogeneous cooperative system 

      Abelló Gamazo, Alberto (1999-06)
      External research report
      Open Access
      Two kinds of heterogeneities interfere with the integration of different information sources, those in systems and those in semantics. They generate different problems and require different solutions. This paper tries to ...
    • Cost model for Pregel on GraphX 

      Kumar, Rohit; Abelló Gamazo, Alberto; Carders, Toon (Springer, 2017)
      Conference report
      Open Access
      The graph partitioning strategy plays a vital role in the overall execution of an algorithm in a distributed graph processing system. Choosing the best strategy is very challenging, as no one strategy is always the best ...
    • Data generator for evaluating ETL process quality 

      Theodorou, Vasileios; Jovanovic, Petar; Abelló Gamazo, Alberto; Nakuçi, Emona (Elsevier, 2017-01-01)
      Article
      Open Access
      Obtaining the right set of data for evaluating the fulfillment of different quality factors in the extract-transform-load (ETL) process design is rather challenging. First, the real data might be out of reach due to different ...
    • Database design and administration 

      Abelló Gamazo, Alberto; Rodríguez González, María Elena; Rollón Rico, Emma (Edicions UPC, 2010)
      Book
      Restricted access to the UPC academic community
      It is assumed that the reader has previous knowledge on a conceptual modeling language as well as on relational databases.<br>This book is thought as a tool to make easy to follow a specific course on database design and ...
    • Day-ahead trading of aggregated energy flexibility 

      Valsomatzis, Emmanouil; Bach Pedersen, Torben; Abelló Gamazo, Alberto (Association for Computing Machinery (ACM), 2018)
      Conference report
      Open Access
      Flexibility of small loads, in particular from Electric Vehicles (EVs), has recently attracted a lot of interest due to their possibility of participating in the energy market and the new commercial potentials. Different ...
    • Describing BLOOM99 with regards to UML semantics 

      Abelló Gamazo, Alberto; Rodríguez González, María Elena (Universidad de Valladolid, 2000)
      Conference lecture
      Open Access
      In this paper, we describe the BLOOM metaclasses with regard to the Unified Modeling Language (UML) semantics. We concentrate essentially on the Generalization/Specialization and Aggregation/Decomposition dimensions. Because ...
    • Discovering functional dependencies from ontologies 

      Romero Moral, Óscar; Calvanese, Diego; Abelló Gamazo, Alberto; Rodríguez Muro, Mariano (Association for Computing Machinery (ACM), 2009)
      Conference report
      Restricted access - publisher's policy
      Nowadays, it is widely accepted that the data warehouse design task should be largely automated. Furthermore, the data warehouse conceptual schema must be structured according to the multidimensional model and as a ...
    • Discovering functional dependencies from ontologies 

      Romero Moral, Óscar; Calvanese, Diego; Abelló Gamazo, Alberto; Rodríguez Muro, Mariano (2009-04)
      External research report
      Open Access
      Discovering functional dependencies is a fundamental step in the design of relational databases and in most system reengineering processes, such as system maintainability and redesign. Typically, this task has been performed ...
    • Discovering meaningful keys from ontologies 

      Romero Moral, Óscar; Abelló Gamazo, Alberto; Montesó, Joan Marc (2009-07)
      External research report
      Open Access
      Object identification is a crucial step in most information systems. Nowadays, we have many different ways to identify entities such as surrogates, keys and object identifiers. However, not all of them guarantee the entity ...
    • Diseño y administración de bases de datos 

      Abelló Gamazo, Alberto; Rodríguez González, María Elena; Rollón Rico, Emma (Edicions UPC, 2006)
      Book
      Restricted access to UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC users
      Se asume que el lector ya tiene conocimientos previos de un lenguaje de modelado conceptual y de bases de datos relacionales. En este libro se aborda la problemática y la multiplicidad que supone obtener un esquema relacional ...
    • DS-Prox : dataset proximity mining for governing the data lake 

      Al-serafi, Ayman Mounir Mohamed; Calders, Toon; Abelló Gamazo, Alberto; Romero Moral, Óscar (Springer, 2017)
      Conference report
      Open Access
      With the arrival of Data Lakes (DL) there is an increasing need for efficient dataset classification to support data analysis and information retrieval. Our goal is to use meta-features describing datasets to detect whether ...
    • E-assessment of relational database skills by means of LearnSQL 

      Quer, 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)
      Conference report
      Open Access
      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 ...