Now showing items 1-13 of 13

  • 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 ...
  • Analysis and optimization of question answering systems 

    Domínguez Sal, David (Universitat Politècnica de Catalunya, 2010-04-23)
    Doctoral thesis
    Open Access
  • Cache-aware load balancing vs. cooperative caching for distributed search engines 

    Domínguez Sal, David; Pérez Casany, Marta; Larriba Pey, Josep (IEEE Computer Society Publications, 2009-06-25)
    Conference report
    Open Access
    In this paper we study the performance of a distributed search engine from a data caching point of view. We compare and combine two different approaches to achieve better hit rates: (a) send the queries to the node which ...
  • Cooperative cache analysis for distributed search engines 

    Domínguez Sal, David; Pérez Casany, Marta; Larriba Pey, Josep (2010)
    Article
    Restricted access - publisher's policy
    In this paper, we study the performance of a distributed search engine from a data caching point of view using statistical tools on a varied set of configurations. We study two strategies to achieve better performance: ...
  • 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, ...
  • High quality, scalable and parallel community detection for large real graphs 

    Prat Pérez, Arnau; Domínguez Sal, David; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2014)
    Conference report
    Restricted access - publisher's policy
    Community detection has arisen as one of the most relevant topics in the field of graph mining, principally for its applications in domains such as social or biological networks analysis. Different community detection ...
  • Introduction to graph databases 

    Larriba Pey, Josep; Martínez Bazán, Norbert; Domínguez Sal, David (2014-09-08)
    Part of book or chapter of book
    Restricted access - publisher's policy
    The use of graphs in analytic environments is getting more and more widespread, with applications in many different environments like social network analysis, fraud detection, industrial management, knowledge analysis, ...
  • Massive query expansion by exploiting graph knowledge bases for image retrieval 

    Guisado Gámez, Joan; Domínguez Sal, David; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2014)
    Conference report
    Restricted access - publisher's policy
    Annotation-based techniques for image retrieval suffer from sparse and short image textual descriptions. Moreover, users are often not able to describe their needs with the most appropriate keywords. This situation is a ...
  • Producer-consumer: the programming model for future many-core processors 

    Prat Pérez, Arnau; Domínguez Sal, David; Larriba Pey, Josep; Troncoso, Pedro (Springer, 2013)
    Conference report
    Restricted access - publisher's policy
    The massive addition of cores on a chip is adding more pressure to the accesses to main memory. In order to avoid this bottleneck, we propose the use of a simple producer-consumer model, which allows for the temporary ...
  • Put three and three together: Triangle-driven community detection 

    Prat Pérez, Arnau; Domínguez Sal, David; Brunat Blay, Josep Maria; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2016-02-01)
    Article
    Open Access
    Community detection has arisen as one of the most relevant topics in the field of graph data mining due to its applications in many fields such as biology, social networks, or network traffic analysis. Although the existing ...
  • Social based layouts for the increase of locality in graph operations 

    Prat Pérez, Arnau; Domínguez Sal, David; Larriba Pey, Josep (2011)
    Article
    Restricted access - publisher's policy
    Graphs provide a natural data representation for analyzing the relationships among entities in many application areas. Since the analysis algorithms perform memory intensive operations, it is important that the graph ...
  • Two-way replacement selection 

    Martínez Palau, Xavier; Domínguez Sal, David; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2010-09-01)
    Article
    Restricted access - publisher's policy
    The performance of external sorting using merge sort is highly dependent on the length of the runs generated. One of the most commonly used run generation strategies is Replacement Selection (RS) because, on average, it ...
  • Using Evolutive Summary Counters for Efficient Cooperative Caching in Search Engines 

    Domínguez Sal, David; Aguilar Saborit, Josep; Surdeanu, Mihai; Larriba Pey, Josep (2012-04)
    Article
    Open Access