Enviaments recents

  • On the use of the derivative of the pole trajectories of the LPC analysis parameter sequence as an alternative to delta parameters 

    Freitag, Fèlix; Monte Moreno, Enrique; Hernando Pericás, Francisco Javier (ESCA - J.M. PARDO, E. ENRIQUEZ, J. ORTEGA, J. FERREIROS GTM-UPM, 1995)
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    In this paper a new approach for modelling time variations in the speech spectra is presented. We propose to approximate the trajectories of the frequency and amplitude of the poles of the LPC spectra with exponential ...
  • Scheduling real-time traffic in underwater acoustic wireless sensor networks 

    Santos, Rodrigo; Orozco, Javier; Micheletto, Matías; Ochoa, Sergio; Meseguer Pallarès, Roc; Millán, Pere; Molina Clemente, Carlos Maria (2016)
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    Accés restringit per política de l'editorial
    Underwater sensor networks are an important field of research. Several applications require the use of this kind of networks like tsunami or oil spill alerts. The underwater medium is very harsh and only acoustic signals ...
  • Using indirect blockmodeling for monitoring students roles in collaborative learning networks 

    Medina Medina, Esunly; Vega d'Aurelio, Davide; Meseguer Pallarès, Roc; Medina, Humberto; Ochoa, Sergio; Magnani, Matteo (2016)
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    Accés restringit per política de l'editorial
    Collaborative learning activities have shown to be useful to address educational processes in several contexts. Monitoring these activities is mandatory to determine the quality of the collaboration and learning processes. ...
  • Application of the boundary elements method to 3-d radiation problem 

    Abad, J.; Duffo Ubeda, Núria; Rius Casals, Juan Manuel; Cruellas Ibarz, Juan Carlos (. REED EXHIBITION COMPANIES, 1993)
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    In order to analyze the electromagnetic fields generated by perfectly conducting bodies composed by interconnected wires and solid objects, whichever its geometry, the Boundary Element Method is applied. The basic formulation ...
  • Community network clouds as a case for the IEEE Intercloud standardization 

    Baig Viñas, Roger; Freitag, Fèlix; Moll, Agustí; Navarro Moldes, Leandro; Pueyo Centelles, Roger; Vlassov, Vladimir (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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    The IEEE P2302 Intercloud WG conducts work since 2011 on the project Standard for Intercloud Interoperability and Federation with the goal to define a standard architecture and building components for large-scale ...
  • A distributed auctioneer for resource allocation in decentralized systems 

    Khan, Muhammad Amin; Vilaça, Xavier; Rodrigues, Luís; Freitag, Fèlix (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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    In decentralized systems, nodes often need to coordinate to access shared resources in a fair manner. One approach to perform such arbitration is to rely on auction mechanisms. Although there is an extensive literature ...
  • Securely-entrusted multi-topology routing for community networks 

    Neumann, Axel; López Berga, Ester; Cerdà Alabern, Llorenç; Navarro Moldes, Leandro (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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    Routing in open and decentralized networks relies on coopera- tion despite the participation of unknown (alien) nodes and node administrators pursuing heterogeneous trust and security goals. Living use cases for such ...
  • Towards incentive-compatible pricing for bandwidth reservation in community network clouds 

    Khan, Muhammad Amin; Vilaça, Xavier; Rodrigues, Luís; Freitag, Fèlix (Springer, 2015)
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    Community network clouds provide for applications of local interest deployed within community networks through collaborative efforts to provision cloud infrastructures. They complement the traditional large-scale public ...
  • On the sustainability of community clouds in guifi.net 

    Baig Viñas, Roger; Freitag, Fèlix; Navarro Moldes, Leandro (Springer, 2015)
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    The Internet and cloud services are key enablers for participation in society. The need for Internet access in areas underserved by commercial telecom operators has often been a motivation to develop community networks. Many ...
  • Energy-efficient Internet of Things monitoring with low-capacity devices 

    Carbajales, Rodrigo J.; Zennaro, Marco; Pietrosemoli, Ermanno; Freitag, Fèlix (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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    The Internet of Things (IoT) allows users to gather data from the physical environment. While sensors in public spaces are already widely used, users are reluctant to deploy sensors for shared data at their homes. The ...

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