Now showing items 1-6 of 6

    • CAPre: Code-Analysis based Prefetching for Persistent object stores 

      Touma, Rizkallah; Queralt Calafat, Anna; Cortés, Toni (Elsevier, 2019-11-12)
      Article
      Restricted access - publisher's policy
      Data prefetching aims to improve access times to data storage systems by predicting data records that are likely to be accessed by subsequent requests and retrieving them into a memory cache before they are needed. In the ...
    • Computer-language based data prefetching techniques 

      Touma, Rizkallah (Universitat Politècnica de Catalunya, 2019-01-25)
      Doctoral thesis
      Open Access
      Data prefetching has long been used as a technique to improve access times to persistent data. It is based on retrieving data records from persistent storage to main memory before the records are needed. Data prefetching ...
    • Machine Learning-based Query Augmentation for SPARQL Endpoints 

      Rico, Mariano; Touma, Rizkallah; Queralt Calafat, Anna; Pérez, María S. (2018)
      Conference lecture
      Open Access
      Linked Data repositories have become a popular source of publicly-available data. Users accessing this data through SPARQL endpoints usually launch several restrictive yet similar consecutive queries, either to find the ...
    • Predicting access to persistent objects through static code analysis 

      Touma, Rizkallah; Queralt Calafat, Anna; Cortés, Toni; Pérez Hernandez, María S. (Springer, 2017)
      Conference report
      Open Access
      In this paper, we present a fully-automatic, high-accuracy approach to predict access to persistent objects through static code analysis of object-oriented applications. The most widely-used previous technique uses a simple ...
    • Semi-Automatic Ontology Matching and Enrichment 

      Touma, Rizkallah (Universitat Politècnica de Catalunya, 2015-09)
      Master thesis
      Open Access
    • Supporting data integration tasks with semi-automatic ontology construction 

      Touma, Rizkallah; Romero Moral, Óscar; Jovanovic, Petar (Association for Computing Machinery (ACM), 2015)
      Conference report
      Restricted access - publisher's policy
      Data integration aims to facilitate the exploitation of heterogeneous data by providing the user with a unified view of data residing in different sources. Currently, ontologies are commonly used to represent this unified ...