Browsing by Subject "Sensor networks"

Now showing items 21-40 of 54

    • Article  

      Finding the K highest-ranked answers in a distributed network 

      Zeinalipour-Yazdi, Constantinos D.; Vagena, Zografoula; Kalogeraki, Vana; Gunopulos, Dimitrios; Tsotras, Vassilis J.; Vlachos, Michail; Koudas, Nick; Srivastava, D. (2009)
      In this paper, we present an algorithm for finding the k highest-ranked (or Top-k) answers in a distributed network. A Top-K query returns the subset of most relevant answers, in place of all answers, for two reasons: (i) ...
    • Conference Object  

      FSort: External sorting on flash-based sensor devices 

      Andreou, Panayiotis G.; Spanos, O.; Zeinalipour-Yazdi, Constantinos D.; Samaras, George S.; Chrysanthis, Panos K. (2009)
      In long-term deployments of Wireless Sensor Networks, it is often more efficient to store sensor readings locally at each device and transmit those readings to the user only when requested (i.e., in response to a user ...
    • Conference Object  

      A general framework for continuous time power control in time varying long term fading wireless networks 

      Olama, M. M.; Djouadi, S. M.; Charalambous, Charalambos D. (2007)
      In this paper, a general framework for continuous time power control algorithm under time varying long term fading wireless channels is developed. This contrasts most of the power control algorithms introduced in the ...
    • Article  

      In-network data acquisition and replication in mobile sensor networks 

      Andreou, Panayiotis G.; Zeinalipour-Yazdi, Constantinos D.; Chrysanthis, Panos K.; Samaras, George S. (2011)
      This paper assumes a set of n mobile sensors that move in the Euclidean plane as a swarm. Our objectives are to explore a given geographic region by detecting and aggregating spatiooral events of interest and to store these ...
    • Conference Object  

      Integrated platform for autonomic computing 

      Panayiotou, Christoforos; Fytros, E.; Tsetsos, V.; Samaras, George S.; Hadjiefthymiades, S.; Piquet, D. (2009)
      IPAC (Integrated Platform for Autonomic Computing) aims at delivering a middleware and service creation environment for developing embedded, intelligent, collaborative, context-aware services in mobile nodes. IPAC relies ...
    • Conference Object  

      Integrated platform for continuous monitoring of children with suspected cardiac arrhythmias 

      Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S.; Hoplaros, Demetris; Jossif, Antonis P.; Kounoudes, A.; Milis, M.; Vogiatzis, Dimitrios G. (2009)
      Children with cardiac arrhythmias constitute one of the most difficult problems in cardiology both in terms of diagnosis and management. In such cases continuous monitoring of ECG vital signs and environmental conditions ...
    • Doctoral Thesis  Open Access

      KSPOT : a network-aware framework for energy-efficient data acquisition in wireless sensor networks 

      Andreou, Panayiotis G. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2011-06)
      Τα Ασύρματα Δίκτυα Αισθητήρων (ΑΔΑ) αποτελούνται από μικροσκοπικές συσκευές με περιορισμένους πόρους και παρέχουν στους χρήστες την ευκαιρία να παρακολουθούν το περιβάλλον με πολύ ψηλή ευκρίνεια. Για τη συλλογή των δεδομένων ...
    • Conference Object  

      KSpot: Effectively monitoring the k most important events in a wireless sensor network 

      Andreou, Panayiotis G.; Zeinalipour-Yazdi, Constantinos D.; Vassiliadou, M.; Chrysanthis, Panos K.; Samaras, George S. (2009)
      This demo presents a graphical user interface and ranking system, coined KSpot, for effectively monitoring the K highest-ranked answers to a query Q in a Wireless Sensor Network. KSpot deploys state-of-the-art distributed ...
    • Conference Object  

      Linear iterative strategies for transmitting streams of values through sensor networks 

      Sundaram, S.; Hadjicostis, Christoforos N. (2009)
      For any given fixed network of interconnected nodes, with some nodes designated as sources and some nodes designated as sinks, we investigate the problem of transmitting a stream of values from every source node to all of ...
    • Conference Object  

      An m-health monitoring system for children with suspected arrhythmias 

      Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S.; Pattichis, Marios S.; Jossif, Antonis P.; Paraskeva, Loucas; Konstantinides, A.; Vogiatzis, Dimitrios G. (2007)
      Advances in wireless communications and networking technologies as well as computer and medical technologies, enable the development of small size, power efficient and more reliable medical multi-parameter recording systems, ...
    • Conference Object  

      An m-health system for continuous monitoring of children with suspected cardiac arrhythmias 

      Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S.; Pattichis, Marios S.; Jossif, Antonis P.; Vogiatzis, Dimitrios G.; Paraskeva, Loucas; Konstantinides, A.; Kounoudes, A. (2008)
      In this study, we present a mobile health (m-Health) system that will be used for continuous monitoring of children with suspected cardiac arrhythmias. The system is able to do real-time acquisition and transmission of ECG ...
    • Conference Object  

      The micropulse framework for adaptive waking windows in sensor networks 

      Zeinalipour-Yazdi, Constantinos D.; Andreou, Panayiotis G.; Chrysanthis, Panos K.; Samaras, George S.; Pitsillides, Andreas (2007)
      In this paper we present MicroPulse, a novel framework for adapting the waking window of a sensing device S based on the data workload incurred by a query Q. Assuming a typical tree-based aggregation scenario, the waking ...
    • Doctoral Thesis  

      Mids : a lightweight intrusion detection system for wireless sensor networks and the internet of things 

      Ioannou, Christiana A. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2017-02)
      Η ομαδοποίηση (clustering) αποσκοπεί στη διαίρεση των αντικειμένων σε ομάδες βάση διαφόρων κριτηρίων. Σε πραγματικά δίκτυα πληροφοριών, κάθε χαρακτηριστικό των αντικειμένων, π.χ. ιδιότητες και τύποι συνδέσεων, περιέχει ...
    • Conference Object  

      Minimum-hot-spot query trees for wireless sensor networks 

      Chatzimilioudis, Georgios; Zeinalipour-Yazdi, Constantinos D.; Gunopulos, Dimitrios (2010)
      We propose a distributed algorithm to construct a balanced communication tree that serves in gathering data from the network nodes to a sink. Our algorithm constructs a near-optimally balanced communication tree with minimum ...
    • Conference Object  

      MINT views: Materialized In-Network Top-k views in sensor networks 

      Zeinalipour-Yazdi, Constantinos D.; Andreou, Panayiotis G.; Chrysanthis, Panos K.; Samaras, George S. (2007)
      In this paper we introduce MINT (Materialized In-Network Top-k) Views, a novel framework for optimizing the execution of continuous monitoring queries in sensor networks. A typical materialized view V maintains the complete ...
    • Article  

      Mobile computing with MPEG-21 

      Angelides, Marios C.; Sofokleous, Anastasis A.; Schizas, Christos N. (2005)
      In the field of multimedia content provision, many researchers investigate numerous techniques for adapting the content based on device, network, environment and user characteristics. In this paper, we present an MPEG-21 ...
    • Article  

      A multi-objective evolutionary algorithm for the deployment and power assignment problem in wireless sensor networks 

      Konstantinidis, Andreas; Yang, K.; Zhang, Q.; Zeinalipour-Yazdi, Constantinos D. (2010)
      A Wireless Sensor Network (WSN) design often requires the decision of optimal locations (deployment) and transmit power levels (power assignment) of the sensors to be deployed in an area of interest. Few attempts have been ...
    • Doctoral Thesis  Open Access

      Nature-inspired congestion control and avoidance in wireless sensor networks 

      Antoniou, Pavlos (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2012-05)
      Ο στόχος της διατριβής είναι να διερευνήσει τεχνικές εμπνευσμένες από τη φύση στο πλαίσιο του ελέγχου συμφόρησης σε ασύρματα δίκτυα αισθητήρων, αντλώντας έμπνευση από τη νοημοσύνη σμήνους καθώς επίσης από μαθηματικά μοντέλα ...
    • Conference Object  

      Opacity verification in stochastic discrete event systems 

      Saboori, A.; Hadjicostis, Christoforos N. (2010)
      Motivated by security and privacy considerations in applications of discrete event systems, various notions of opacity have been introduced. Specifically, a system is said to be current-state opaque if the entrance of the ...
    • Article  

      Optimized query routing trees for wireless sensor networks 

      Andreou, Panayiotis G.; Zeinalipour-Yazdi, Constantinos D.; Pamboris, Andreas; Chrysanthis, Panos K.; Samaras, George S. (2011)
      In order to process continuous queries over Wireless Sensor Networks (WSNs), sensors are typically organized in a Query Routing Tree (denoted as T) that provides each sensor with a path over which query results can be ...