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Πλοήγηση ανά Συγγραφέα "Manolopoulos, Y."

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    • Cache consistency in Wireless Multimedia Sensor Networks 

      Dimokas, N.; Katsaros, D.; Manolopoulos, Y. (2010)
      The production of cheap CMOS cameras, which are able to capture rich multimedia content, combined with the creation of low-power circuits, gave birth to what is called Wireless Multimedia Sensor Networks (WMSNs). WMSNs ...

    • CDNs Content Outsourcing via Generalized Communities 

      Katsaros, D.; Pallis, G.; Stamos, K.; Vakali, A.; Sidiropoulos, A.; Manolopoulos, Y. (2009)
      Content distribution networks (CDNs) balance costs and quality in services related to content delivery. Devising an efficient content outsourcing policy is crucial since, based on such policies, CDN providers can provide ...

    • CDNsim: A Simulation Tool for Content Distribution Networks 

      Stamos, K.; Pallis, G.; Vakali, A.; Katsaros, D.; Sidiropoulos, A.; Manolopoulos, Y. (2010)
      Content distribution networks (CDNs) have gained considerable attention in the past few years. Hence there is need for developing frameworks for carrying out CDN simulations. In this article we present a modeling and ...

    • Cooperative caching in wireless multimedia sensor networks 

      Dimokas, N.; Katsaros, D.; Manolopoulos, Y. (2008)
      The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap ...

    • The d-hop k-data coverage query problem in wireless sensor networks 

      Kontaki, M.; Katsaros, D.; Manolopoulos, Y. (2008)
      The task of querying wireless sensor network (WSN) to retrieve data of interest is very significant and a wealth of query types have been proposed in the context of WSNs. This article describes the d-hop k-data coverage ...

    • EBC: A topology control algorithm for achieving high QoS in sensor networks 

      Cuzzocrea, A.; Katsaros, D.; Manolopoulos, Y.; Papadimitriou, A. (2009)
      A novel approach for achieving high Quality of Service (QoS) in sensor networks via topology control is introduced and experimentally assessed in this paper. Our approach falls in the broader discipline of graph structural ...

    • Edge betweenness centrality: A novel algorithm for QoS-based topology control over wireless sensor networks 

      Cuzzocrea, A.; Papadimitriou, A.; Katsaros, D.; Manolopoulos, Y. (2012)
      In this paper we propose a novel topology-control algorithm, called edge betweenness centrality (EBC). EBC is based on the concept of betweenness centrality, which has been first introduced in the context of social network ...

    • Energy-efficient distributed clustering in wireless sensor networks 

      Dimokas, N.; Katsaros, D.; Manolopoulos, Y. (2010)
      The deployment of wireless sensor networks in many application areas requires self-organization of the network nodes into clusters. Clustering is a network management technique, since it creates a hierarchical structure ...

    • Generalized Hirsch h-index for disclosing latent facts in citation networks 

      Sidiropoulos, A.; Katsaros, D.; Manolopoulos, Y. (2007)
      What is the value of a scientist and its impact upon the scientific thinking? How can we measure the prestige of a journal or a conference? The evaluation of the scientific work of a scientist and the estimation of the ...

    • Generalized indexing for energy-efficient access to partially ordered broadcast data in wireless networks 

      Katsaros, D.; Dimokas, N.; Manolopoulos, Y. (2006)
      Energy conservation and access efficiency are two fundamental though competing goals in broadcast wireless networks. To tackle the energy penalty from sequential searching, the interleaving of index with data items has ...

    • The geodesic broadcast scheme for wireless ad hoc networks 

      Katsaros, D.; Manolopoulos, Y. (2006)
      Broadcasting is an effective means for disseminating information in wireless ad hoc networks. In this paper we propose a novel distributed broadcasting protocol in wireless ad hoc networks, which is based on an highly ...

    • High performance, low complexity cooperative caching for Wireless Sensor Networks 

      Dimokas, N.; Katsaros, D.; Tassiulas, L.; Manolopoulos, Y. (2009)
      During the last decade, Wireless Sensor Networks (WSNs) have emerged and matured at such point that currently support several applications like environment control, intelligent buildings, target tracking in battlefields, ...

    • High performance, low complexity cooperative caching for wireless sensor networks 

      Dimokas, N.; Katsaros, D.; Tassiulas, L.; Manolopoulos, Y. (2011)
      During the last decade, Wireless Sensor Networks have emerged and matured at such point that they currently support several applications such as environment control, intelligent buildings, target tracking in battlefields. ...

    • LR-tree: A logarithmic decomposable spatial index method 

      Bozanis, P.; Nanopoulos, A.; Manolopoulos, Y. (2003)
      Since its introduction in 1984, R-tree has been proven to be one of the most practical and well-behaved data structures for accommodating dynamic massive sets of geometric objects and conducting a very diverse set of queries ...

    • Music retrieval over wireless ad-hoc networks 

      Karydis, I.; Nanopoulos, A.; Papadopoulos, A.; Katsaros, D.; Manolopoulos, Y. (2008)
      Wireless networks introduce new opportunities for music delivery. The trend of using mobile devices on wireless networks can significantly extent the recent change of paradigm in the model of music distribution by allowing ...

    • A new plane-sweep algorithm for the k-closest-pairs query 

      Roumelis, G.; Vassilakopoulos, M.; Corral, A.; Manolopoulos, Y. (2014)
      One of the most representative and studied Distance-Based Queries in Spatial Databases is the K-Closest-Pairs Query (KCPQ). This query involves two spatial data sets and a distance function to measure the degree of closeness, ...

    • Node clustering in wireless sensor networks by considering structural characteristics of the network graph 

      Dimokas, N.; Katsaros, D.; Manolopoulos, Y. (2007)
      The deployment of wireless sensor networks in many application areas, e.g., aggregation services, requires self-organization of the network nodes into clusters. Quite a lot of node clustering techniques have appeared in ...

    • Plane-sweep algorithms for the K Group Nearest-Neighbor Query 

      Roumelis, G.; Vassilakopoulos, M.; Corral, A.; Manolopoulos, Y. (2015)
      One of the most representative and studied queries in Spatial Databases is the (K) Nearest-Neighbor (NNQ), that discovers the (K) nearest neighbor(s) to a query point. An extension that is important for practical applications ...

    • PREDICTION IN WIRELESS NETWORKS BY MARKOV CHAINS 

      Katsaros, D.; Manolopoulos, Y. (2009)
      Discrete sequence modeling and prediction is an important goal and a challenge for pervasive computing. Mobile clients' data request forecasting and location tracking in wireless cellular networks are characteristic ...

    • Predictive join processing between regions and moving objects 

      Corral, A.; Torres, M.; Vassilakopoulos, M.; Manolopoulos, Y. (2008)
      The family of R-trees is suitable for indexing various kinds of multidimensional objects. TPR*-trees are R-tree based structures that have been proposed for indexing a moving object database, e.g. a data-base of moving ...