Now showing items 21-40 of 41

  • Identifying the Productive and Influential Bloggers in a Community 

    Akritidis, L.; Katsaros, D.; Bozanis, P. (2011)
    Social networking has become one of the most important trends on the Web, leading to the development of several social applications such as blogs. Blogs are locations on the Web where individuals are provided with the ...
  • Industry performance evaluation with the use of financial ratios: An application of bootstrapped DEA 

    Halkos, G. E.; Tzeremes, N. G. (2012)
    In data envelopment analysis (DEA) context financial data/ratios have been used in order to produce a unified measure of performance metric. However, several scholars have indicated that the inclusion of financial ratios ...
  • A knowledge management architecture for 3D shapes and applications 

    Pitikakis, M.; Houstis, C.; Vasilakis, G.; Vavalis, M. (2005)
    In this paper, we present a knowledge-based approach to 3D shape management and service composition, exploiting and extending Web Services and Semantic Web technologies. Semantic Web technology fosters semantic interoperability, ...
  • A low-power VLSI architecture for intra prediction in H.264 

    Stamoulis, G.; Koziri, M.; Katsavounidis, I.; Bellas, N. (2005)
    The H.264 video coding standard can achieve considerably higher coding efficiency than previous standards. The key to this high code efficiency are mainly the Intra and Inter prediction modes provided by the standard. ...
  • A MaxMin approach for hiding frequent itemsets 

    Moustakides, G. V.; Verykios, V. S. (2008)
    In this paper, we are proposing a new algorithmic approach for sanitizing raw data from sensitive knowledge in the context of mining of association rules. The new approach (a) relies on the maxmin criterion which is a ...
  • A Multiscale Error Diffusion Technique for Digital Multitoning 

    Sarailidis, G.; Katsavounidis, I. (2012)
    Multitoning is the representation of digital pictures using a given set of available color intensities, which are also known as tones or quantization levels. It can be viewed as the generalization of halftoning, where only ...
  • A network aware privacy model for online requests in trajectory data 

    Gkoulalas-Divanis, A.; Verykios, V. S.; Bozanis, P. (2009)
    In this work, we propose a privacy model for online user requests on trajectory data in location based services by utilizing an underlying network of user movement. The privacy model has been implemented as a framework ...
  • Partitioning elements of the Periodic Table via fuzzy clustering technique 

    Karakasidis, T. E.; Georgiou, D. N. (2004)
    In this paper we present fuzzy clustering results of the elements of the Periodic Table according to several physical properties related directly to their electronic structure (ionization potential, cohesion energy, ...
  • Random direction divisive clustering 

    Tasoulis, S. K.; Tasoulis, D. K.; Plagianakos, V. P. (2013)
    Projection methods for dimension reduction have enabled the discovery of otherwise unattainable structure in ultra high dimensional data. More recently, a particular method, namely Random Projection, has been shown to have ...
  • Refinement of human silhouette segmentation in omni-directional indoor videos 

    Delibasis, K. K.; Plagianakos, V. P.; Maglogiannis, I. (2014)
    In this paper, we present a methodology for refining the segmentation of human silhouettes in indoor videos acquired by fisheye cameras. This methodology is based on a fisheye camera model that employs a spherical optical ...
  • Semantic query suggestion using Twitter Entities 

    Anagnostopoulos, I.; Razis, G.; Mylonas, P.; Anagnostopoulos, C. N. (2015)
    There are many web information management methods and techniques that help search engines and news services to provide useful suggestions with respect to queries, thus facilitating the users' search. However, the penetration ...
  • Semantically interoperable three-dimensional scientific objects 

    Pitikakis, M.; Vavalis, M.; Houstis, C. (2012)
    In recent years, digital content of three-dimensional (3D) scientific objects has become widespread and is made available in a plethora of on-line scientific repositories. A systematic and formal approach becomes necessary ...
  • Service configuration and traffic distribution in composite radio environments 

    Demestichas, P. P.; Stavroulaki, V. A. G.; Papadopoulou, L. M. I.; Vasilakos, A. V.; Theologou, M. E. (2004)
    This paper adopts the assumption that cellular, broadband fixed wireless access (BFWA), wireless local area networks (WLAN), and digital video broadcasting (DVB) systems can be co-operating components of a composite-radio ...
  • Special issue on embedded vision 

    Chai, S.; Kisacanin, B.; Bellas, N. (2010)
  • Special issue on soft computing applications to CDMA power control optimization 

    Pedrycz, W.; Vasilakos, A.; Feroldi, M. (2005)
  • Statistical data mining of streaming motion data for activity and fall recognition in assistive environments 

    Tasoulis, S. K.; Doukas, C. N.; Plagianakos, V. P.; Maglogiannis, I. (2013)
    The analysis of human motion data is interesting in the context of activity recognition or emergency event detection, especially in the case of elderly or disabled people living independently in their homes. Several ...
  • Subject Recognition Based on Ground Reaction Force Measurements of Gait Signals 

    Moustakidis, S. P.; Theocharis, J. B.; Giakas, G. (2008)
    An effective subject recognition approach is designed in this paper, using ground reaction force (GRF) measurements of human gait. The method is a three-stage procedure: 1) The original GRF data are translated through ...
  • A tool for calculating energy consumption in wireless sensor networks 

    Dimitriou, G.; Kikiras, P. K.; Stamoulis, G. I.; Avaritsiotis, I. N. (2005)
    Energy and total useful lifetime are primary design concerns of fundamental importance, in a variety of real life applications, where the deployment of a Wireless Sensor Network is desired. In this paper the authors introduce ...
  • Virtual reality: The non-temporal cartographic animation and the urban (large) scale projects 

    Sidiropoulos, G.; Pappas, V.; Vasilakos, A. (2005)
    The evolution of digital technology has placed cartography in a dialog on questions concerning the new abilities, its form and prospective. The cartographic presentation in three dimensions has as a basic feature: the ...
  • WeR-trees 

    Bozanis, P.; Foteinos, P. (2007)
    R-tree has been proven to be one of the most practical and well-behaved data structures for accommodating dynamic massive sets of low dimensionality geometric objects and conducting a very diverse set of queries on such ...