Ara es mostren els items 1-20 de 33

    • A data quality framework for graph-based virtual data integration systems 

      Li, Yalei; Nadal Francesch, Sergi; Romero Moral, Óscar (Springer, 2022)
      Text en actes de congrés
      Accés obert
      Data Quality (DQ) plays a critical role in data integration. Up to now, DQ has mostly been addressed from a single database perspective. Popular DQ frameworks rely on Integrity Constraints (IC) to enforce valid application ...
    • A situational approach for the definition and tailoring of a data-driven software evolution method 

      Franch Gutiérrez, Javier; Ralyté, Jolita; Perini, Anna; Abelló Gamazo, Alberto; Ameller, David; Gorroñogoitia, Jesús; Nadal Francesch, Sergi; Oriol Hilari, Marc; Seyff, Norbert; Siena, Alberto; Susi, Angelo (Springer, 2018)
      Text en actes de congrés
      Accés obert
      Successful software evolution heavily depends on the selection of the right features to be included in the next release. Such selection is difficult, and companies often report bad experiences about user acceptance. To ...
    • 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 ...
    • Advances and challenges in automated malaria diagnosis using digital microscopy imaging with artificial intelligence tools: A review 

      Rubio Maturana, Carles; Oliveira, Allisson Dantas de; Nadal Francesch, Sergi; Bilalli, Besim; Abelló Gamazo, Alberto; López Codina, Daniel; Sayrol Clols, Elisa (Frontiers Media SA, 2022-11-15)
      Article
      Accés obert
      Malaria is an infectious disease caused by parasites of the genus Plasmodium spp. It is transmitted to humans by the bite of an infected female Anopheles mosquito. It is the most common disease in resource-poor settings, ...
    • 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 ...
    • 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 obert
      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. ...
    • 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
      Accés obert
      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, ...
    • Automated database design for document stores with multicriteria optimization 

      Hewasinghage, Moditha Lakshan Dharmasir; Nadal Francesch, Sergi; Abelló Gamazo, Alberto; Zimányi, Esteban (Springer, 2023-03-11)
      Article
      Accés obert
      Document stores have gained popularity among NoSQL systems mainly due to the semi-structured data storage structure and the enhanced query capabilities. The database design in document stores expands beyond the first normal ...
    • 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
      Accés obert
      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 ...
    • D3M: automated data-driven decision making 

      Farré Tost, Carles; Flores Herrera, Javier de Jesús; Nadal Francesch, Sergi; Volkova Volkova, Alexandra (CEUR-WS.org, 2022)
      Text en actes de congrés
      Accés obert
      Data has an undoubtedly impact on society. Storing, processing and analyzing large amounts of available data is currently one of the key success factors for an organization. Nonetheless, we are recently witnessing a change ...
    • DocDesign 2.0: Automated database design for document stores with multi-criteria optimization 

      Hewasinghage, Moditha Lakshan Dharmasir; Nadal Francesch, Sergi; Abelló Gamazo, Alberto (OpenProceedings, 2021)
      Comunicació de congrés
      Accés obert
      We present DocDesign 2.0, a novel system that supports database design for document stores. DocDesign 2.0 automatically generates a document store design driven by a query workload and a set of optimization objectives. In ...
    • Effective and scalable data discovery with NextiaJD 

      Flores Herrera, Javier de Jesús; Nadal Francesch, Sergi; Romero Moral, Óscar (OpenProceedings, 2021)
      Comunicació de congrés
      Accés obert
      We present NextiaJD, a data discovery system with high predictive performance and computational efficiency. NextiaJD aids data scientists in the discovery of datasets that can be crossed. To that end, it proposes a ranking ...
    • FAME: supporting continuous requirements elicitation by combining user feedback and monitoring 

      Oriol Hilari, Marc; Stade, Melanie; Fotrousi, Farnaz; Nadal Francesch, Sergi; Varga, Jovan; Seyff, Norbert; Abelló Gamazo, Alberto; Franch Gutiérrez, Javier; Marco Gómez, Jordi; Schmidt, Oleg (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      Context: Software evolution ensures that software systems in use stay up to date and provide value for end-users. However, it is challenging for requirements engineers to continuously elicit needs for systems used by ...
    • Generating valid test data through data cloning 

      Oriol Hilari, Xavier; Teniente López, Ernest; Maynou Yélamos, Marc; Nadal Francesch, Sergi (Elsevier, 2023-07)
      Article
      Accés obert
      One of the most difficult, time-consuming and error-prone tasks during software testing is that of manually generating the data required to properly run the test. This is even harder when we need to generate data of a ...
    • Graph-driven federated data management 

      Nadal Francesch, Sergi; Abelló Gamazo, Alberto; Romero Moral, Óscar; Vansummeren, Stijn; Vassiliadis, Panos (2023-01-01)
      Article
      Accés obert
      Modern data analysis applications, require the ability to provide on-demand integration of data sources while offering a flexible and user-friendly query interface. Traditional techniques for answering queries using views, ...
    • Graph-driven federated data management (extended abstract) 

      Nadal Francesch, Sergi; Abelló Gamazo, Alberto; Romero Moral, Óscar; Vansummeren, Stijn; Vassiliadis, Panos (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      Modern data analysis applications require the ability to provide on-demand integration of data sources while offering a user-friendly query interface. Traditional methods for answering queries using views, focused on a ...
    • iMAGING: a novel automated system for malaria diagnosis by using artificial intelligence tools and a universal low-cost robotized microscope 

      Rubio Maturana, Carles; Oliveira, Allisson Dantas de; Nadal Francesch, Sergi; Zarzuela Serrat, Francesc; Sulleiro Igual, Elena; Ruiz Marti, Edurne; Bilalli, Besim; Veiga Lluch, Anna; Espasa Soley, Mateu; Abelló Gamazo, Alberto; Pumarola Sunyer, Tomas; Segu Estruch, Marta; López Codina, Daniel; Sayrol Clos, Elisa; Joseph Munné, Joan (Frontiers Media SA, 2023-11-24)
      Article
      Accés obert
      Malaria is one of the most prevalent infectious diseases in sub-Saharan Africa, with 247 million cases reported worldwide in 2021 according to the World Health Organization. Optical microscopy remains the gold standard ...
    • Incremental schema integration for data wrangling via knowledge graphs 

      Flores Herrera, Javier de Jesús; Rabbani, Kashif; Nadal Francesch, Sergi; Gómez Seoane, Cristina; Romero Moral, Óscar; Jamin, Emmanuel; Dasiopoulou, Stamatia (2023-06-08)
      Article
      Accés obert
      Virtual data integration is the current approach to go for data wrangling in data-driven decision-making. In this paper, we focus on automating schema integration, which extracts a homogenised representation of the data ...
    • Integration-oriented ontology 

      Nadal Francesch, Sergi; Abelló Gamazo, Alberto (Springer, 2018-02-01)
      Capítol de llibre
      Accés obert
      The purpose of an integration-oriented ontology is to provide a conceptualization of a domain of interest for automating the data integration of an evolving and heterogeneous set of sources using Semantic Web technologies. ...
    • Intermediate results materialization selection and format for data-intensive flows 

      Munir, Rana Faisal; Nadal Francesch, Sergi; Romero Moral, Óscar; Abelló Gamazo, Alberto; Jovanovic, Petar; Thiele, Maik; Lehner, Wolfgang (2018-05-01)
      Article
      Accés restringit per política de l'editorial
      Data-intensive flows deploy a variety of complex data transformations to build information pipelines from data sources to different end users. As data are processed, these workflows generate large intermediate results, ...