Ara es mostren els items 16-35 de 52

    • Data reconstruction applications for IoT air pollution sensor networks using graph signal processing 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Elsevier, 2022-09)
      Article
      Accés restringit per política de l'editorial
      The analysis of sensor networks for air pollution monitoring is challenging. Recent studies have demonstrated the ability to reconstruct the network measurements with graphs derived from the acquired data, thus describing ...
    • Delay-efficient MAC protocol with traffic differentiation and run-time parameter adaptation for energy-constrained wireless sensor networks 

      Doudou, Messaoud; Djenouri, Diamel; Barceló Ordinas, José María; Badache, Nadjib (2016-02-01)
      Article
      Accés obert
      This paper presents an asynchronous cascading wake-up MAC protocol for heterogeneous traffic gathering in low-power wireless sensor networks. It jointly considers energy/delay optimization and switches between two modes, ...
    • Distributed multi-scale calibration of low-cost ozone sensors in wireless sensor networks 

      Barceló Ordinas, José María; Ferrer Cid, Pau; García Vidal, Jorge; Ripoll, Anna; Viana, Mar (Multidisciplinary Digital Publishing Institute (MDPI), 2019-05-31)
      Article
      Accés obert
      New advances in sensor technologies and communications in wireless sensor networks have favored the introduction of low-cost sensors for monitoring air quality applications. In this article, we present the results of the ...
    • Duo-MAC: Energy and time constrained data delivery MAC protocol in wireless sensor networks 

      Doudou, Messaoud; Alaei, Mohammad; Djenouri, Djamel; Barceló Ordinas, José María; Badache, Nadjib (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We present Duo-MAC, an asynchronous cascading wake-up scheduled MAC protocol for heterogeneous traffic forwarding in low-power wireless networks. Duo-MAC deals with energy-delay minimization problem and copes with transmission ...
    • Energy efficiency of MAC protocols in low data rate wireless multimedia sensor networks: A comparative study 

      Alskaif, Tarek; Bellalta Jiménez, Boris; Guerrero Zapata, Manel; Barceló Ordinas, José María (Elsevier, 2017-03-01)
      Article
      Accés obert
      Some new application scenarios for Wireless Sensor Networks (WSNs) such as urban resilience, smart house/building, smart agriculture and animal farming, among others, can be enhanced by adding multimedia sensors able to ...
    • Evaluation of a cooperative ARQ protocol for delay-tolerant vehicular networks 

      Morillo Pozo, Julián David; Trullols Cruces, Óscar; Barceló Ordinas, José María; García Vidal, Jorge (2008-10-16)
      Capítol de llibre
      Accés obert
      This paper evaluates a Cooperative ARQ protocol to be used in delay-tolerant vehicular networks. The scenario consists in cars downloading information from Access Points along a road. The key difference between proposed ...
    • Exact decoding probability under random linear network coding 

      Trullols Cruces, Óscar; Barceló Ordinas, José María; Fiore, Marco (2011-01)
      Article
      Accés obert
      In this letter, we compute the exact probability that a receiver obtains N linearly independent packets among K ≥ N received packets, when the sender/s use/s random linear network coding over a Galois Field of size q. Such ...
    • Game theory framework for MAC parameter optimization in energy-delay constrained sensor networks 

      Doudou, Messaoud; Barceló Ordinas, José María; Djenouri, Djamel; García Vidal, Jorge; Bouabdallah, Abdelmadjid; Badache, Nadjib (2016-05)
      Article
      Accés obert
      Optimizing energy consumption and end-to-end (e2e) packet delay in energy-constrained, delay-sensitive wireless sensor networks is a conflicting multiobjective optimization problem. We investigate the problem from a game ...
    • Generation and analysis of a large-scale urban vehicular mobility dataset 

      Uppoor, Sandesh; Trullols Cruces, Óscar; Fiore, Marco; Barceló Ordinas, José María (2014-05)
      Article
      Accés restringit per política de l'editorial
      The surge in vehicular network research has led, over the last few years, to the proposal of countless network solutions specifically designed for vehicular environments. A vast majority of such solutions has been evaluated ...
    • Graph learning techniques using structured data for IoT air pollution monitoring platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2021-09-01)
      Article
      Accés obert
      Existing air pollution monitoring networks use reference stations as the main nodes. The addition of low-cost sensors calibrated in-situ with machine learning techniques allows the creation of heterogeneous air pollution ...
    • Graph signal reconstruction techniques for IoT air pollution monitoring platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2022-12-15)
      Article
      Accés obert
      Air pollution monitoring platforms play a very important role in preventing and mitigating the effects of pollution. Recent advances in the field of graph signal processing have made it possible to describe and analyze air ...
    • H2020 project CAPTOR dataset: Raw data collected by low-cost MOX ozone sensors in a real air pollution monitoring network 

      Barceló Ordinas, José María; Ferrer Cid, Pau; García Vidal, Jorge; Viana Rodríguez, Mar; Ripoll, Anna (Elsevier, 2021-06)
      Article
      Accés obert
      The H2020 CAPTOR project deployed three testbeds in Spain, Italy and Austria with low-cost sensors for the measurement of tropospheric ozone (O3). The aim of the H2020 CAPTOR project was to raise public awareness in a ...
    • Impact of the infrastructure in mobile opportunistic networks 

      Trullols Cruces, Óscar; Morillo Pozo, Julián David; Barceló Ordinas, José María (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Epidemic modeling has been used to analyze many disciplines such as biology, ecology and medicine. In the last years, it also has been applied to networking paradigms such as social networks, virus spreading in Internet ...
    • Information dissemination in VANETs: deployment strategies for maximizing coverage 

      Trullols Cruces, Óscar; Barceló Ordinas, José María; Fiore, Marco; Casetti, Claudio; Chiasserini, Carla-Fabiana (2009)
      Comunicació de congrés
      Accés obert
      We consider that a given number of Dissemination Points (DPs) have to be deployed for disseminating information to vehicles travelling in an urban area. We formulate our problem as a Maximum Coverage Problem (MCP) so as ...
    • Information mobility: a new paradigm for wireless content dissemination 

      Barceló Ordinas, José María; Casetti, Claudio; Karlsson, Gunnar; Sargento, Susana (IEEE Computer Society Publications, 2009-09-28)
      Text en actes de congrés
      Accés obert
      Content distribution networks are nowadays becoming a mature technology. Nevertheless, content delivery research in ad hoc networks has dealt with overlay applications, information querying and data broadcasting techniques. ...
    • Machine Learning (ML) module 

      Barceló Ordinas, José María; García Vidal, Jorge; Ferrer Cid, Pau (Universitat Politècnica de Catalunya, 2023-06-27)
      Apunts
      Accés obert
    • Multisensor data fusion calibration in IoT air pollution platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Ripoll, Anna; Viana, Mar (2020-04-01)
      Article
      Accés obert
      This article investigates the calibration of low-cost sensors for air pollution. The sensors were deployed on three Internet of Things (IoT) platforms in Spain, Austria, and Italy during the summers of 2017, 2018, and 2019. ...
    • Node clustering based on overlapping FoVs for wireless multimedia sensor networks 

      Alaei, Mohammad; Barceló Ordinas, José María (2010)
      Text en actes de congrés
      Accés obert
      Wireless Multimedia Sensor nodes sense areas that are uncorrelated to the areas covered by radio neighbor sensors. Thus, node clustering for coordinating multimedia sensing and processing cannot be based on classical sensor ...
    • Non-linear models for black carbon exposure modelling using air pollution datasets 

      Puig Rovira, Josep M.; Paredes Ahumada, Juan Antonio; Barceló Ordinas, José María; García Vidal, Jorge; Reche Andúgar, Cristina; Sola Salvatierra, Yolanda; Fung, Pascale; Petaja, Tuukka; Hussein, Tareq; Viana Rodríguez, Mar (Elsevier, 2022-09-01)
      Article
      Accés obert
      Black carbon (BC) is a product of incomplete combustion, present in urban aerosols and sourcing mainly from road traffic. Epidemiological evidence reports positive associations between BC and cardiovascular and respiratory ...
    • Optimal data compression for lifetime maximization in wireless sensor networks operating in stealth mode 

      Incebacak, Davut; Zilan, Ruken; Tavli, Bulent; Barceló Ordinas, José María; García Vidal, Jorge (Elsevier, 2015-01)
      Article
      Accés obert
      Contextual privacy in Wireless Sensor Networks (WSNs) is concerned with protecting contextual information such as whether, when, and where the data is collected. In this context, hiding the existence of a WSN from adversaries ...