Enviaments recents

  • Towards incentive-compatible pricing for bandwidth reservation in community network clouds 

    Khan, Muhammad Amin; Vilaça, Xavier; Rodrigues, Luís; Freitag, Fèlix (Springer, 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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)
    Text en actes de congrés
    Accés obert
    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 ...
  • Hubbub-scale: towards reliable elastic scaling under multi-tenancy 

    Rameshan, Navaneeth; Ying, Liu; Navarro Moldes, Leandro; Vlassov, Vladimir (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Elastic resource provisioning is used to guarantee service level objective (SLO) with reduced cost in a Cloud platform. However, performance interference in the hosting platform introduces uncertainty in the performance ...
  • Profiling memory vulnerability of big-data applications 

    Rameshan, Navaneeth; Birke, R.; Navarro Moldes, Leandro; Vlassov, Vladimir; Urgaonkar, B.; Kesidis, G.; Schmatz, M.; Chen, L. Y. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Motivated by the increasing popularity of hosting in-memory big-data analytics in cloud, we present a profiling methodology that can understand how different memory subsystems, i.e., cache and memory bandwidth, are susceptible ...
  • Towards network-aware service placement in community network micro-clouds 

    Selimi, Mennan; Vega d'Aurelio, Davide; Freitag, Fèlix; Veiga, Luis (Springer, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Cloud services in community networks have been enabled by micro-cloud providers. They form community network micro-clouds (CNMCs), which grow organically, i.e. without being planned and optimized beforehand. Services running ...
  • Augmenting elasticity controllers for improved accuracy 

    Rameshan, Navaneeth; Ying, Liu; Navarro Moldes, Leandro; Vlassov, Vladimir (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Elastic resource provisioning is used to guarantee service level objectives (SLO) at reduced cost in a Cloud platform. However, performance interference in the hosting platform introduces uncertainty in the performance ...
  • Modelado de la trayectoria de los polos en la secuencia de LPC 

    Freitag, Fèlix; Monte Moreno, Enrique; Hernando Pericás, Francisco Javier (Universidad de Valladolid, 1995)
    Text en actes de congrés
    Accés obert
    A alternative way of representing time variations of the speech spectra is presented. We propose to model the trajectories of the poles of the LPC analysis spectra using exponential functions as alternative to delta ...
  • On the use of the derivative of pole trajectories of the LPC analysis parameter sequence as an alternative to delta parameters 

    Freitag, Fèlix; Monte Moreno, Enrique; Hernando Pericás, Francisco Javier (1995)
    Text en actes de congrés
    Accés obert
    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 ...
  • Predictive neural networks applied to phoneme recognition 

    Freitag, Fèlix; Monte Moreno, Enrique; Salavedra Molí, Josep (1997)
    Text en actes de congrés
    Accés obert
    In this paper a phoneme recognition system based on predictive neural networks is proposed. Neural networks are used to predict observation vectors of speech frames. The obtained prediction error is used for phoneme ...

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