Ara es mostren els items 82-101 de 132

    • On distributed systems and CSCL. 

      Navarro Moldes, Leandro; Marquès Puig, Joan Manel; Freitag, Fèlix (IEEE, 2004-04)
      Text en actes de congrés
      Accés obert
      The design of distributed systems for collaborative work or learning requires that both humans and machines be organized such that the potential and limitations of the human-machine interdependence is optimized. Current ...
    • On edge cloud service provision with distributed home servers 

      Khan, Amin Muhammad; Freitag, Fèlix (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés obert
      Edge computing has been proposed for new types of cloud services, which need computing infrastructure at the network edge. Driven by important use cases from the Internet of Things (IoT) domain, edge cloud computing has ...
    • On edge microclouds to provide local container-based services 

      Baig Viñas, Roger; Pueyo Centelles, Roger; Freitag, Fèlix; Navarro Moldes, Leandro (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés obert
      Edge computing has been proposed to enable more user-centric cloud-based services. Nowadays, edge computing is operational in industrial and consumer-oriented scenarios. An important limitation of today's solutions, however, ...
    • On network flow management in virtualized environments 

      Rodríguez Haro, Fernando; Freitag, Fèlix; Navarro Moldes, Leandro; Farías Mendoza, Nicandro; Guerrero Ibáñez, Juan Antonio (2009-11)
      Text en actes de congrés
      Accés obert
      Virtualization has enabled the use of virtual machine (VM) based resource providers to offer computing power as a service. However, one important feature is to have certainty about the planed or expected performance of the ...
    • On participatory service provision at the network edge with community home gateways 

      Khan, Amin M.; Freitag, Fèlix (Elsevier, 2017-06-12)
      Article
      Accés obert
      Edge computing is considered as a technology to enable new types of services which operate at the network edge. There are important use cases in ambient intelligence and the Internet of Things (IoT) for edge computing ...
    • On the collaborative governance of decentralized edge microclouds with blockchain-based distributed ledgers 

      Freitag, Fèlix (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      Today's commercial model for edge computing services consists in lightweight devices at the network edge connected through the Internet to remote cloud data centers. Microclouds are an alternative vision of edge computing, ...
    • On the scalability of tracing mechanisms 

      Freitag, Fèlix; Caubet Serrabou, Jordi; Labarta Mancho, Jesús José (Springer Verlag, 2002)
      Text en actes de congrés
      Accés obert
      Performance analysis tools are an important component of the parallel program development and tuning cycle. To obtain the raw performance data, an instrumented application is run with probes that take measures of specific ...
    • 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 obert
      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 ...
    • 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 ...
    • 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)
      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 ...
    • On-device training of machine learning models on microcontrollers with a look at federated learning 

      Monfort Grau, Marc; Pueyo Centelles, Roger; Freitag, Fèlix (Association for Computing Machinery (ACM), 2021)
      Text en actes de congrés
      Accés obert
      Recent progress in machine learning frameworks makes it now possible to run an inference with sophisticated machine learning models on tiny microcontrollers. Model training, however, is typically done separately on powerful ...
    • On-device training of machine learning models on microcontrollers with federated learning 

      Llisterri Giménez, Nil; Monfort Grau, Marc; Pueyo Centelles, Roger; Freitag, Fèlix (2022-02-14)
      Article
      Accés obert
      Recent progress in machine learning frameworks has made it possible to now perform inference with models using cheap, tiny microcontrollers. Training of machine learning models for these tiny devices, however, is typically ...
    • Open project-based learning for dynamic adaptability of IT education 

      Tous Liesa, Rubén; Freitag, Fèlix (2023-10)
      Article
      Accés obert
      The pace of technological change is accelerating, the duration of the trends is becoming shorter and the number of technological alternatives to solve IT problems grows quickly. Keeping IT higher education course curricula ...
    • Performance evaluation of a distributed storage service in community network clouds 

      Selimi, Mennan; Freitag, Fèlix; Cerdà Alabern, Llorenç; Veiga, Luis (Wiley, 2015-09-20)
      Article
      Accés obert
      Community networks are self-organized and decentralized communication networks built and operated by citizens, for citizens. The consolidation of today's cloud technologies offers now, for community networks, the possibility ...
    • Performance evaluation of federated learning over wireless mesh Networks with low-capacity devices 

      Freitag, Fèlix; Vilchez Blanco, Pedro; Wei, Lu; Liu, Chun-Hung; Selimi, Mennan (Springer, 2022)
      Capítol de llibre
      Accés obert
      Federated learning is a distributed learning technique in which a machine learning model is trained collaboratively among several nodes. While the privacy preservation of the training data is one of the important promises ...
    • Performance measuring framework for grid market middleware 

      Freitag, Fèlix; Chacín Martínez, Pablo; Chao, Isaac; Brunner, René; Navarro Moldes, Leandro; Ardáiz Villanueva, Óscar (Springer, 2007)
      Comunicació de congrés
      Accés obert
      Current implementations of Grid infrastructures provide frameworks which aim at achieve on-demand computing. In such a scenario, contribution and use of resources will be governed by business models. The challenge is to ...
    • Phoneme recognition with statistical modeling of the prediction error of neural networks 

      Freitag, Fèlix; Monte Moreno, Enrique (International Speech Communication Association (ISCA), 1998)
      Text en actes de congrés
      Accés obert
      This paper presents a speech recognition system which incorporates predictive neural networks. The neural networks are used to predict observation vectors of speech. The prediction error vectors are modeled on the state ...
    • Phoneme recognition with statisticasl modeling of the prediction of the error of neural networks 

      Freitag, Fèlix; Monte Moreno, Enrique (Robert H. Mannel and Jordi Robert-Ribes, 1998)
      Text en actes de congrés
      Accés obert
      This paper presents a speech recognition system which incorporates predictive neural networks. The neural networks are used to predict observation vectors of speech. The prediction error vectors are modeled on the state ...
    • Position paper: LoRa mesh networks for enabling distributed intelligence on tiny IoT nodes 

      Freitag, Fèlix; Miquel Solé, Joan; Meseguer Pallarès, Roc (IOS Press, 2023)
      Capítol de llibre
      Accés obert
      LoRaWAN is a widely used solution in today’s Internet of Things (IoT) applications to connect remote sensor nodes to the Internet. At the same time, microcontroller-based sensor nodes with increased processing capacities ...
    • Poster: Testbed in wireless city mesh network with application to federated learning experiments 

      Freitag, Fèlix; Vilchez Blanco, Pedro; Wei, Lu; Liu, Chun-Hung; Selimi, Mennan (Association for Computing Machinery (ACM), 2021)
      Comunicació de congrés
      Accés obert
      The increase of the computing capacity of IoT devices and the appearance of lightweight machine learning frameworks have led to the situation that machine learning can nowadays be run in IoT applications at the network ...