Now showing items 21-36 of 36

  • 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 ...
  • Memory-, bandwidth-, and power-aware multi-core for a graph database workload 

    Trancoso, Pedro; Martínez Bazán, Norbert; Larriba Pey, Josep (Springer, 2011)
    Conference lecture
    Restricted access - publisher's policy
    Processors have evolved to the now de-facto standard multicore architecture. The continuous advances in technology allow for increased component density, thus resulting in a larger number of cores on the chip. This, in ...
  • 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 ...
  • Optimization of instruction fetch for decision support workloads 

    Ramírez Bellido, Alejandro; Larriba Pey, Josep; Navarro García, Carlos; Serrano, Xavier; Valero Cortés, Mateo; Torrellas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Conference report
    Open Access
    Instruction fetch bandwidth is feared to be a major limiting factor to the performance of future wide-issue aggressive superscalars. In this paper, we focus on database applications running decision support workloads. We ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Software trace cache 

    Ramírez Bellido, Alejandro; Larriba Pey, Josep; Valero Cortés, Mateo (2005-01)
    Article
    Open Access
    We explore the use of compiler optimizations, which optimize the layout of instructions in memory. The target is to enable the code to make better use of the underlying hardware resources regardless of the specific details ...
  • The effect of code reordering on branch prediction 

    Ramírez Bellido, Alejandro; Larriba Pey, Josep; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Conference report
    Open Access
    Branch prediction accuracy is a very important factor for superscalar processor performance. The ability to predict the outcome of a branch allows the processor to effectively use a large instruction window, and extract a ...
  • Trace cache redundancy: red and blue traces 

    Ramírez Bellido, Alejandro; Larriba Pey, Josep; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Conference report
    Open Access
    The objective of this paper is to improve the use of the hardware resources of the trace cache mechanism, reducing the implementation cost with no performance degradation. We achieve that by eliminating the replication of ...
  • Transistor count and chip-space estimation of simplescalar-based microprocessor model 

    Steinhaus, Marc; Kolla, Reiner; Larriba Pey, Josep; Ungerer, Theo; Valero Cortés, Mateo (2001)
    Conference report
    Open Access
    This paper proposes a chip space and transistor count estimation tool, which receives its input from the baseline architecture and the configuration file of the microarchitecture performance simulator sim-outorder of the ...
  • 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