Ara es mostren els items 1-20 de 289

    • A cluster head decision system for sensor networks using fuzzy logic and number of neighbor nodes 

      Anno, Junpei; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2009)
      Text en actes de congrés
      Accés obert
      Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network’s communication energy dissipation. However, the selection of cluster head is not ...
    • A cluster head selection method for wireless sensor networks based on fuzzy logic 

      Anno, Junpei; Barolli, Leonard; Xhafa Xhafa, Fatos; Durresi, Arjan (Institute of Electrical and Electronics Engineers (IEEE), 2007)
      Text en actes de congrés
      Accés obert
      Sensor networks supported by recent technological advances in low power wireless communications along with silicon integration of various functionalities are emerging as a critically important computer class that enable ...
    • A context-aware service architecture for the integration of body sensor networks and social networks through IP multimedia subsystem 

      Domingo Aladrén, Mari Carmen (2011-01-01)
      Article
      Accés restringit per política de l'editorial
      In this article a new context-aware architecture is proposed for the integration of body sensor networks and social networks through the IP Multimedia Subsystem. Its motivating application scenarios are described. The ...
    • A diffusion-based distributed EM algorithm for density estimation in wireless sensor networks 

      Silva Pereira, Silvana; López Valcarce, Roberto; Pagès Zamora, Alba Maria (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      We address the problem of distributed estimation of a parameter from a set of noisy observations collected by a sensor network, assuming that some sensors may be subject to data failures and report only noise. In such ...
    • A diffusion-based em algorithm for distributed estimation in unreliable sensor networks 

      Silva Pereira, Silvana; López Valcarce, Roberto; Pagès Zamora, Alba Maria (2013-01)
      Article
      Accés restringit per política de l'editorial
      We address the problem of distributed estimation of a parameter from a set of noisy observations collected by a sensor network, assuming that some sensors may be subject to data failures and report only noise. In such ...
    • A distributed energy-aware routing protocol for underwater wireless sensor networks 

      Domingo Aladrén, Mari Carmen (2011-04-01)
      Article
      Accés restringit per política de l'editorial
      The design of routing protocols for Underwater Wireless Sensor Networks (UWSNs) poses many challenges due to the intrinsic properties of underwater environments. In this paper we present DUCS (Distributed Underwater ...
    • A hybrid cooperative design for energy-efficient surveillance in wireless multimedia sensor networks 

      Alaei, Mohammad; Barceló Ordinas, José María (VDE Conference Publications, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In Wireless Multimedia Sensor Networks (WMSNs) the lifetime of battery-operated visual nodes is limited by their energy consumption, which is proportional to the energy required for sensing, processing, and transmitting ...
    • A method for clustering and cooperation in wireless multimedia sensor networks 

      Alaei, Mohammad; Barceló Ordinas, José María (2010-04)
      Article
      Accés obert
      Wireless multimedia sensor nodes sense areas that are uncorrelated to the areas covered by radio neighbouring sensors. Thus, node clustering for coordinating multimedia sensing and processing cannot be based on classical ...
    • A mixed-signal control system for Lorentz-force resonant MEMS magnetometers 

      Sánchez Chiva, José María; Valle Fraga, Juan José; Fernández, Daniel; Madrenas Boadas, Jordi (2019-09-01)
      Article
      Accés obert
      This paper presents a mixed-signal closed-loop control system for Lorentz force resonant MEMS magnetometers. The control system contributes to 1) the automatic phase control of the loop, that allows start-up and keeps ...
    • A new MPPT method for low-power solar energy harvesting 

      López Lapeña, Oscar; Penella López, María Teresa; Gasulla Forner, Manuel (2010-09)
      Article
      Accés obert
      This paper describes a new maximum-power-pointtracking (MPPT) method focused on low-power (< 1 W) photovoltaic (PV) panels. The static and dynamic performance is theoretically analyzed, and design criteria are provided. ...
    • A proxy design to leverage the interconnection of CoAP wireless sensor networks with web applications 

      Ludovici, Alessandro; Calveras Augé, Anna M. (2015-01-09)
      Article
      Accés obert
      In this paper, we present the design of a Constrained Application Protocol (CoAP) proxy able to interconnect Web applications based on Hypertext Transfer Protocol (HTTP) and WebSocket with CoAP based Wireless Sensor Networks. ...
    • A sensor web architecture for integrating smart oceanographic sensors into the semantic sensor web 

      Río Fernandez, Joaquín del; Toma, Daniel; Martínez Padró, Enoc; O'Reilly, Thomas C.; Delory, Eric; Pearlman, Jay S; Waldmann, Christoph; Jirka, Simon (2018-10)
      Article
      Accés obert
      Effective ocean and coastal data management are needed to manage marine ecosystem health. Past ocean and coastal data management systems were often very specific to a particular application and region, but this focused ...
    • A Sensor web architecture for sharing oceanographic sensor data 

      Jirka, Simon; Toma, Daniel; Río Fernandez, Joaquín del; Delory, Eric (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Accés restringit per política de l'editorial
      This paper introduces the Sensor Web architecture of the NeXOS project as example how interoperable standards help, to facilitate the creation of an infrastructure for sharing oceanographic observation data and the ...
    • A simple and efficient MPPT method for low-power PV cells 

      Penella López, María Teresa; Gasulla Forner, Manuel (2014-01-01)
      Article
      Accés obert
      Small-size PV cells have been used to power sensor nodes. These devices present limited computing resources and so low complexity methods have been used in order to extract the maximum power from the PV cells. Among them, ...
    • A simulation system for routing efficiency in wireless sensor-actor networks: a case study for semi-automated architecture 

      Barolli, Leonard; Yang, Tao; Ikeda, Makoto; Durresi, Arjan; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      Text en actes de congrés
      Accés obert
      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 ...
    • A simulation system for WSNs as a digital eco-system approach considering goodput metric 

      Barolli, Leonard; Yang, Tao; Mino, Gjergji; Durresi, Arjan; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés obert
      Sensor networks are a sensing, computing and communication infrastructure that are able to observe and respond to phenomena in the natural environment and in our physical and cyber infrastructure. The sensors themselves ...
    • A survey on M2M systems for mHealth: a wireless communications perspective 

      Kartsakli, Elli; Lalos, Aristeidis; Antonopoulos, Angelos; Tennina, Stefano; Di Renzo, Marco; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2014-10-01)
      Article
      Accés obert
      In the new era of connectivity, marked by the explosive number of wireless electronic devices and the need for smart and pervasive applications, Machine-to-Machine (M2M) communications are an emerging technology that enables ...
    • A tool for rapid MAC protocols prototyping and designing for wireless sensor networks 

      Amorós Martínez, Luis Miguel (Universitat Politècnica de Catalunya, 2012-09-25)
      Projecte Final de Màster Oficial
      Accés obert
      Wireless Sensor Networks (WSNs)consists of several resource constrained sensor nodes distributed over an specific geographical area. WSNs are typically energy constraint due to the fact the sensor nodes are battery ...
    • A Topology Reorganization Scheme for Reliable Communication in Underwater Wireless Sensor Networks Affected by Shadow Zones 

      Domingo Aladrén, Mari Carmen (2009-10-29)
      Article
      Accés obert
      Effective solutions should be devised to handle the effects of shadow zones in Underwater Wireless Sensor Networks (UWSNs). An adaptive topology reorganization scheme that maintains connectivity in multi-hop UWSNs affected ...
    • A viability plan of a unit of research in applications of new telecommunications technologies 

      Tena del Pozo, Alberto (Universitat Politècnica de Catalunya, 2009-06-30)
      Projecte Final de Màster Oficial
      Accés obert