Recent Submissions

  • Global optimality in k-means clustering 

    Tîrnauca, Cristina; Gómez Pérez, Domingo; Balcázar Navarro, José Luis; Montaña Arnaiz, José Luis (2018-05-01)
    Article
    Restricted access - publisher's policy
    We study the problem of finding an optimum clustering, a problem known to be NP-hard. Existing literature contains algorithms running in time proportional to the number of points raised to a power that depends on the ...
  • Implementation of CAVENET and its usage for performance evaluation of AODV, OLSR and DYMO protocols in vehicular networks 

    Spaho, Evjola; Barolli, Leonard; Mino, Gjergji; Xhafa Xhafa, Fatos; Kolici, Vladi; Miho, Rozeta (HINDAWI, 2010)
    Article
    Open Access
    Vehicle Ad-hoc Network (VANET) is a kind of Mobile Ad-hoc Network (MANET) that establishes wireless connection between cars. In VANETs and MANETs, the topology of the network changes very often, therefore implementation ...
  • Performance evaluation of wireless sensor networks for mobile event and mobile sink 

    Yang, Tao; Ikeda, Makoto; Barolli, Leonard; Xhafa Xhafa, Fatos; Durresi, Arjan (2010-12)
    Article
    Open Access
    Extending lifetime and energy efficiency are important objectives and challenges in-Wireless Sensor Networks (WSNs). In large scale WSNs, when the nodes are near to the sink they consume much more energy than the nodes far ...
  • Application of JXTA-overlay platform for secure robot control 

    Spaho, Evjola; Matsuo, Keita; Barolli, Leonard; Xhafa Xhafa, Fatos; Arnedo Moreno, Joan; Kolici, Vladi (2010)
    Article
    Open Access
    In this paper, we present the evaluation and experimental results of secured robot control in a P2P system. The control system is based on JXTA-Overlay platform. We used secure primitives and functions of JXTA-Overlay for ...
  • Routing efficiency in wireless sensor-actor networks considering semi-automated architecture 

    Barolli, Leonard; Yang, Tao; Mino, Gjergji; Xhafa Xhafa, Fatos; Durresi, Arjan (2010)
    Article
    Open Access
    Wireless networks have become increasingly popular and advances in wireless communications and electronics have enabled the development of different kind of networks such as Mobile Ad-hoc Networks (MANETs), Wireless Sensor ...
  • Formal analysis of model transformations based on triple graph grammars 

    Hermann, Frank; Ehrig, Hartmut; Golas, Ulrike; Orejas Valdés, Fernando (2014-08-01)
    Article
    Open Access
    Triple graph grammars (TGGs) are a well-established concept for the specification and execution of bidirectional model transformations within model driven software engineering. Their main advantage is an automatic generation ...
  • A distributed hybrid index for processing continuous range queries over moving objects 

    Yu, Ziqiang; Xhafa Xhafa, Fatos; Chen, Yuehui; Ma, Kun (Springer, 2017-12-28)
    Article
    Restricted access - publisher's policy
    Central to many location-based services is the problem of processing concurrent continuous range queries over a large scale of moving objects. Most relevant works to this problem mainly investigate the centralized search ...
  • WIT: a wireless integrated traffic model 

    Doci, Arta; Xhafa Xhafa, Fatos (HINDAWI, 2008)
    Article
    Open Access
    Simulation is a common approach for designing ad hoc network applications, due to the slow deployment of these networks. The main building blocks of ad hoc network applications are the routing protocols, mobility, and ...
  • A testbed for MANETs: Implementation, experiences and learned lessons 

    Barolli, Leonard; Ikeda, Makoto; Xhafa Xhafa, Fatos; Duresi, Arjan (2010-06)
    Article
    Open Access
    In this paper, we present the implementation, experiences and lessons learned of our tesbed for Ad-hoc networks and Mobile Ad hoc Networks (MANETs). We used OLSR protocol for real experimental evaluation. We investigate ...
  • Routing in a many-to-one communication scenario in a realistic VDTN 

    Bylykbashi, Kevin; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos (2018)
    Article
    Open Access
    In this paper, we evaluate and compare the performance of different routing protocols in a many-to-one communication within a Vehicular Delay Tolerant Network (VDTN). Seven groups with three stationary sensor nodes sense ...
  • Sistema inteligente de soporte a la decisión en digestión anaerobia 

    Cugeró Escofet, Miquel Àngel; Aguiló Martos, Pere; Sáenz de Cabezón Soriano, Berta; Sànchez-Marrè, Miquel (2017-10)
    Article
    Open Access
    Se presenta un Sistema Inteligente de Soporte a la Decisión (IDSS) con diagnosis avanzada del proceso de digestión anaerobia en tiempo real, desarrollado por el Consorci Besòs Tordera, con el objetivo de optimizar el ...
  • Minimum bisection is NP-hard on unit disk graphs 

    Díaz Cort, Josep; Mertzios, George B. (2017-05-18)
    Article
    Open Access
    In this paper we prove that the Min-Bisection problem is NP-hard on unit disk graphs, thus solving a longstanding open question.

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