Now showing items 1-16 of 16

  • A discussion on the design of graph database benchmarks 

    Domínguez Sal, David; Martínez Bazán, Norbert; Muntés Mulero, Víctor; Baleta Ferrer, Pedro; Larriba Pey, Josep (2011)
    Article
    Open Access
    Graph Database Management systems (GDBs) are gaining popularity. They are used to analyze huge graph datasets that are naturally appearing in many application areas to model interrelated data. The objective of this paper ...
  • An inside analysis of a genetic-programming based optimizer 

    Muntés Mulero, Víctor; Aguilar Saborit, Josep; Larriba Pey, Josep; Zuzarte, Calisto; Markl, Volker (Institute of Electrical and Electronics Engineers, 2006)
    Conference report
    Open Access
    The use of evolutionary algorithms has been proposed as a powerful random search strategy to solve the join order problem. Specifically, genetic programming used in query optimization has been proposed as an alternative ...
  • Anonymizing data via polynomial regression 

    Nin Guerrero, Jordi; Pont Tuset, Jordi; Medrano Gracia, Pau; Larriba Pey, Josep; Muntés Mulero, Víctor (2007)
    Conference report
    Open Access
    The amount of confidential information accessible through the Internet is growing continuously. In this scenario, the improvement of anonymizing methods becomes crucial to avoid revealing sensible information of individuals. ...
  • Búsqueda de comunidades en grafos grandes mediante configuraciones implícitas de vectores 

    Muntés Mulero, Víctor; Padrol Sureda, Arnau; Perarnau Llobet, Guillem; Pfeifle, Julián (PUBL. UNIVERSIDAD DE ZARAGOZA, 2009)
    Conference report
    Open Access
    Presentamos el algoritmo OCA para buscar comunidades solapadas en grafos grandes, como por ejemplo la Wikipedia con 1,6×107 nodos y 1,8×108 aristas. OCA se basa en la búsqueda iterativa de subconjuntos localmente óptimos ...
  • Context-aware machine translation for software localization 

    Muntés Mulero, Víctor; Paladini Adell, Patricia; España Bonet, Cristina; Màrquez Villodre, Lluís (2012)
    Conference lecture
    Open Access
    Software localization requires translating short text strings appearing in user interfaces (UI) into several languages. These strings are usually unrelated to the other strings in the UI. Due to the lack of semantic ...
  • DEX: High-performance exploration on large graphs for information retrieval 

    Martínez Bazán, Norbert; Muntés Mulero, Víctor; Gómez Villamor, Sergio; Nin Guerrero, Jordi; Sánchez Martínez, Mario; Larriba Pey, Josep (2007)
    Conference report
    Restricted access - publisher's policy
    Link and graph analysis tools are important devices to boost the richness of information retrieval systems. Internet and the existing social networking portals are just a couple of situations where the use of these tools ...
  • Efficient graph management based on bitmap indices 

    Martínez Bazán, Norbert; Muntés Mulero, Víctor; Gómez Villamor, Sergio; Domínguez Sal, David; Águila Lorente, Miguel Ángel; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2012)
    Conference report
    Restricted access - publisher's policy
    The increasing amount of graph like data from social networks, science and the web has grown an interest in analyzing the relationships between different entities. New specialized solutions in the form of graph databases, ...
  • Hybrid in-memory and on-disk tables for speeding-up table accesses 

    Guisado Gámez, Joan; Wolski, Antoni; Zuzarte, Calisto; Larriba Pey, Josep; Muntés Mulero, Víctor (Springer, 2010)
    Conference report
    Open Access
    Main memory database management systems have become essential for response-time-bounded applications, such as those in telecommunications systems or Internet, where users frequently access a table in order to get information ...
  • Hybrid tables for speeding-up data accesses in hybrid database management systems 

    Guisado Gámez, Joan; Wolski, Antoni; Zuzarte, Calisto; Larriba Pey, Josep; Muntés Mulero, Víctor (2011)
    Conference lecture
    Open Access
  • Improving microaggregation for complex record anonymization 

    Pont Tuset, Jordi; Nin Guerrero, Jordi; Medrano Gracia, Pau; Larriba Pey, Josep; Muntés Mulero, Víctor (Springer Verlag, 2008)
    Conference report
    Restricted access - publisher's policy
    Microaggregation is one of the most commonly employed microdata protection methods. This method builds clusters of at least k original records and replaces the records in each cluster with the centroid of the cluster. ...
  • Increasing polynomial regression complexity for data anonymization 

    Nin Guerrero, Jordi; Pont Tuset, Jordi; Medrano Gracia, Pau; Larriba Pey, Josep; Muntés Mulero, Víctor (IEEE Computer Society, 2007)
    Conference report
    Open Access
    Pervasive computing and the increasing networking needs usually demand from publishing data without revealing sensible information. Among several data protection methods proposed in the literature, those based on linear ...
  • On the use of semantic blocking techniques for data cleansing and integration 

    Nin Guerrero, Jordi; Muntés Mulero, Víctor; Martínez Bazán, Norbert; Larriba Pey, Josep (IEEE Computer Society, 2007)
    Conference report
    Open Access
    Record Linkage (RL) is an important component of data cleansing and integration. For years, many efforts have focused on improving the performance of the RL process, either by reducing the number of record comparisons ...
  • Overlapping community search for social networks 

    Padrol Sureda, Arnau; Perarnau Llobet, Guillem; Pfeifle, Julián; Muntés Mulero, Víctor (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference report
    Open Access
    Finding decompositions of a graph into a family of clusters is crucial to understanding its underlying structure. While most existing approaches focus on partitioning the nodes, real-world datasets suggest the presence ...
  • Parameter determination of ONN (Ordered Neural Networks) 

    Pont Tuset, Jordi; Medrano Gracia, Pau; Nin Guerrero, Jordi; Larriba Pey, Josep; Muntés Mulero, Víctor (2007)
    External research report
    Open Access
    The need for data privacy motivates the development of new methods that allow to protect data minimizing the disclosure risk without losing information. In this paper, we propose a new protection method for numerical data ...
  • Semantic blocking for record linkage 

    Nin Guerrero, Jordi; Muntés Mulero, Víctor; Martínez Bazán, Norbert; Larriba Pey, Josep (IOS Press, 2007)
    Conference report
    Restricted access - publisher's policy
    Record Linkage (RL) is an important component of data cleaning and integration and data processing in general. For years, many efforts have focused on improving the performance of the RL process, either by reducing the ...
  • Using genetic algorithms for attribute grouping in multivariate microaggregation 

    Balasch Masoliver, Jordi; Muntés Mulero, Víctor; Nin Guerrero, Jordi (2014-01-01)
    Article
    Open Access
    Anonymization techniques that provide k-anonymity suffer from loss of quality when data dimensionality is high. Microaggregation techniques are not an exception. Given a set of records, attributes are grouped into ...