Enviaments recents

  • Enhanced magnification for reduced movement in virtual reality environments 

    Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau (IADIS Press, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Although Virtual Reality (VR) environments have seen slower adoption rates than expected among the medical community, throughout the last years, several new techniques and devices (e.g. Oculus Rift) have been developed ...
  • Total order in opportunistic networks 

    Costea, Mihail; Ciobanu, Radu; Marin, Radu Corneliu; Dobre, Ciprian M.; Mavromoustakis, Constandinos X.; Mastorakis, George; Xhafa Xhafa, Fatos (2017-05-25)
    Article
    Accés restringit per política de l'editorial
    Opportunistic network applications are usually assumed to work only with unordered immutable messages, like photos, videos, or music files, while applications that depend on ordered or mutable messages, like chat or shared ...
  • A GA-based simulation system for WMNs: comparison analysis for different number of flows, client distributions, DCF and EDCA functions 

    Barolli, Admir; Oda, Tetsuya; Matsuo, Keita; Cuka, Miralda; Barolli, Leonard; Xhafa Xhafa, Fatos (Springer, 2017-02-04)
    Article
    Accés restringit per política de l'editorial
    In this paper, we compare the performance of Distributed Coordination Function (DCF) and Enhanced Distributed Channel Access (EDCA) for normal and uniform distributions of mesh clients considering two Wireless Mesh Network ...
  • A privacy-preserving fuzzy interest matching protocol for friends finding in social networks 

    Wang, Xu An; Xhafa Xhafa, Fatos; Luo, Xiaoshuang; Zhang, Shuaiwei; Ding, Yong (Springer, 2017-02-07)
    Article
    Accés restringit per política de l'editorial
    Nowadays, it is very popular to make friends, share photographs, and exchange news throughout social networks. Social networks widely expand the area of people’s social connections and make communication much smoother than ...
  • Dynamic learning of cases from data streams 

    Orduña Cabrera, Fernando; Sànchez-Marrè, Miquel (Real Academia de Ingeniería (RAI), 2016)
    Text en actes de congrés
    Accés obert
    This paper presents a dynamic adaptive framework for building a case library being able to cope with a data stream in the field of Case-Based Reasoning. The framework provides a three-layer architecture formed by a set of ...
  • Clustering of exchange rates and their dynamics under different dependence measures 

    Renedo, Martí; Arratia Quesada, Argimiro Alejandro (, 2016)
    Text en actes de congrés
    Accés obert
    This paper proposes an improvement to the method for clustering exchange rates given by D. J. Fenn et al, in Quantitative Finance, 12 (10) 2012, pp.1493-1520. To deal with the potentially non linear nature of currency time ...
  • Immunity and simplicity in relativizations of probabilistic complexity classes 

    Balcázar Navarro, José Luis; Russo, David A. (1988-05)
    Article
    Accés obert
    The existence of immune and simple sets in relativizations of the probabilistic polynomial time bounded classes is studied. Some techniques previously used to show similar results for relativizations of P and NP are adapted ...
  • Sparse sets, lowness, and highness 

    Balcázar Navarro, José Luis; Book, R; Schoening, U (1986-08)
    Article
    Accés obert
    We develop the notions of “generalized lowness” for sets in PH (the union of the polynomial-time hierarchy) and of “generalized highness” for arbitrary sets. Also, we develop the notions of “extended lowness” and “extended ...
  • The complexity of testing properties of simple games 

    Freixas Bosch, Josep; Molinero Albareda, Xavier; Olsen, Martin; Serna Iglesias, María José (2008-04-04)
    Report de recerca
    Accés obert
    Simple games cover voting systems in which a single alternative, such as a bill or an amendment, is pitted against the status quo. A simple game or a yes-no voting system is a set of rules that specifies exactly which ...
  • Improving IntSat by expressing disjunctions of bounds as linear constraints 

    Asín Acha, Roberto Javier; Aloysius Bezem, Marcus; Nieuwenhuis, Robert Lukas Mario (2016)
    Article
    Accés restringit per política de l'editorial
    Conflict-Driven Clause Learning (CDCL) SAT solvers can automatically solve very large real-world problems. IntSat is a new technique extending CDCL to Integer Linear Programming (ILP). For some conflicts, IntSat generates ...

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