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Showing 1-20 of 29 results
  1. Article
    Full access

    Enhancing shopping experiences in smart retailing

    The retailing market has undergone a paradigm-shift in the last decades, departing from its traditional form of shopping in brick-and-mortar stores...

    Lorena Bourg, Thomas Chatzidimitris, ... Christos Zaroliagis in Journal of Ambient Intelligence and Humanized Computing
    04 January 2021
  2. Article

    A location history-aware recommender system for smart retail environments

    Recommender systems (RSs) represent integral parts of e-commerce platforms for almost two decades now. The recent emergence of mobile context-aware...

    Thomas Chatzidimitris, Damianos Gavalas, ... Christos Zaroliagis in Personal and Ubiquitous Computing
    15 February 2020
  3. Chapter

    Renewable Mobility in Smart Cities:TheMOVESMART Approach

    The provision of efficient, sustainable, and personalized mobility services that combine a broad range of transport modes (e.g., public...
    Damianos Gavalas, Kalliopi Giannakopoulou, ... Christos Zaroliagis in Smart Technologies for Smart Cities
    2020
  4. Conference paper

    Enhanced Buying Experiences in Smart Cities: The SMARTBUY Approach

    The establishment of shopping malls and the growth of online shopping increasingly diminishes the turnover of “small”, independent retailers in urban...
    Lorena Bourg, Thomas Chatzidimitris, ... Christos Zaroliagis in Ambient Intelligence
    2019
  5. Chapter

    Evolutionary Computation for the Ship Routing Problem

    In this chapter, we present evolutionary algorithms for solving the real time ship weather routing problem. The objectives to be minimized are the...
    Aphrodite Veneti, Charalampos Konstantopoulos, Grammati Pantziou in Modeling, Computing and Data Handling Methodologies for Maritime Transportation
    2018
  6. Book

    Modeling, Computing and Data Handling Methodologies for Maritime Transportation

    This book is one of very few in the maritime literature that solely focus on the latest developments in information technology (IT) methodologies in...

    Charalampos Konstantopoulos, Grammati Pantziou in Intelligent Systems Reference Library
    2018
  7. Article

    Mobile agents-based data aggregation in WSNs: benchmarking itinerary planning approaches

    Data aggregation represents one of the most challenging and well-studied subjects in the Wireless Sensor Networks (WSN) literature. The energy...

    Ioannis E. Venetis, Damianos Gavalas, ... Charalampos Konstantopoulos in Wireless Networks
    08 February 2017
  8. Article

    Scenic route planning for tourists

    Tourists visiting unknown destinations become increasingly dependent on mobile city guides to locate tourist services and retrieve informative...

    Damianos Gavalas, Vlasios Kasapakis, ... Nikolaos Vathis in Personal and Ubiquitous Computing
    06 October 2016
  9. Article

    Energy-efficient multiple itinerary planning for mobile agents-based data aggregation in WSNs

    Data aggregation is recognized as a key method for reducing the amount of network traffic and the energy consumption on wireless sensor network...

    Damianos Gavalas, Ioannis E. Venetis, ... Grammati Pantziou in Telecommunication Systems
    03 February 2016
  10. Article
    Full access

    A parallel algorithm for motion estimation in video coding using the bilinear transformation

    Accurate motion estimation between frames is important for drastically reducing data redundancy in video coding. However, advanced motion estimation...

    Charalampos Konstantopoulos in SpringerPlus
    24 June 2015 Open access
  11. Article

    An image processing inspired mobile sink solution for energy efficient data gathering in wireless sensor networks

    This paper presents a gradient-based multi-hop clustering protocol combined with a mobile sink (MS) solution for efficient data gathering in wireless...

    Charalampos Konstantopoulos, Basilis Mamalis, ... Vasileios Thanasias in Wireless Networks
    03 August 2014
  12. Article

    A survey on algorithmic approaches for solving tourist trip design problems

    The tourist trip design problem (TTDP) refers to a route-planning problem for tourists interested in visiting multiple points of interest (POIs)....

    Damianos Gavalas, Charalampos Konstantopoulos, ... Grammati Pantziou in Journal of Heuristics
    21 March 2014
  13. Conference paper

    Efficient Heuristics for the Time Dependent Team Orienteering Problem with Time Windows

    The Time Dependent Team Orienteering Problem with Time Windows (TDTOPTW) can be used to model several real life problems. Among them, the route...
    Damianos Gavalas, Charalampos Konstantopoulos, ... Nikolaos Vathis in Applied Algorithms
    2014
  14. Conference paper

    Cluster-Based Heuristics for the Team Orienteering Problem with Time Windows

    The Team Orienteering Problem with Time Windows (TOPTW) deals with deriving a number of tours comprising a subset of candidate nodes (each associated...
    Damianos Gavalas, Charalampos Konstantopoulos, ... Yiannis Tasoulas in Experimental Algorithms
    2013
  15. Conference paper

    Watershed-Based Clustering for Energy Efficient Data Gathering in Wireless Sensor Networks with Mobile Collector

    This paper presents a clustering protocol combined with a mobile sink (MS) solution for efficient data gathering in wireless sensor networks (WSNs)....
    Charalampos Konstantopoulos, Basilis Mamalis, ... Vasileios Thanasias in Euro-Par 2012 Parallel Processing
    2012
  16. Article

    An approach for near-optimal distributed data fusion in wireless sensor networks

    In wireless sensor networks (WSNs), a lot of sensory traffic with redundancy is produced due to massive node density and their diverse placement....

    Damianos Gavalas, Aristides Mpitziopoulos, ... Charalampos Konstantopoulos in Wireless Networks
    24 September 2009
  17. Conference paper

    Mobile Sinks for Information Retrieval from Cluster-Based WSN Islands

    Mobile sinks (MS) mounted upon urban vehicles with fixed trajectories (e.g. buses) provide the ideal infrastructure to effectively retrieve sensory...
    Grammati Pantziou, Aristides Mpitziopoulos, ... Basilis Mamalis in Ad-Hoc, Mobile and Wireless Networks
    2009
  18. Chapter

    Mobile Agent Middleware for Autonomic Data Fusion in Wireless Sensor Networks

    Mobile agents (MAs) are referred to as autonomous application programs with the inherent ability to move from node to node towards a goal completion....
    Aristides Mpitziopoulos, Damianos Gavalas, ... Grammati Pantziou in Autonomic Computing and Networking
    2009
  19. Article

    Efficient parallel Text Retrieval techniques on Bulk Synchronous Parallel (BSP)/Coarse Grained Multicomputers (CGM)

    In this paper, we present efficient, scalable, and portable parallel algorithms for the off-line clustering, the on-line retrieval and the update...

    Charalampos Konstantopoulos, Basilis Mamalis, ... Damianos Gavalas in The Journal of Supercomputing
    30 July 2008
  20. Chapter

    Interactive Cluster-Based Personalized Retrieval on Large Document Collections

    Lately, many systems and websites add personalization functionalities among their provided services. However, for large document collections it is...
    Petros Belsis, Charalampos Konstantopoulos, ... Christos Skourlas in New Directions in Intelligent Interactive Multimedia
    2008
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