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    • A comparative analysis of performances of econometric, fuzzy and time-series models for the forecast of transport demand 

      Profillidis, V. A.; Botzoris, G. N. (2007)
      The paper attempts to evaluate how the fuzzy method can improve the range of forecast achieved by classic econometric and time-series models. Based on a survey of factors affecting rail passenger demand and using data of ...

    • Cooperation and directionality: Friends or foes? 

      Tao, Z.; Korakis, T.; Liu, F.; Panwar, S.; Zhang, J.; Tassiulas, L. (2008)
      As the two key technologies that have the potential to reshape the landscape of next-generation wireless network, cooperative communications and directional antenna system so far have been developed in parallel, if not in ...

    • Decentralized CUSUM change detection 

      Moustakides, G. V. (2006)
      We consider the problem of decentralized change detection using the CUSUM test. More than one sensors acquire independent signals and send their quantized version to a fusion center that uses this information to detect a ...

    • Design and implementation of a VIPSec based application 

      Kopsidas, S.; Zisiadis, D.; Tassiulas, L. (2007)
      Voice over IP (VoIP) is one of the most emerging technologies, while a respectable number of corresponding applications are being implemented or updated in daily basis. Although communications security is a constant ...

    • A free terrain model for trajectory k-anonymity 

      Gkoulalas-Divanis, A.; Verykios, V. S. (2008)
      This paper introduces a privacy model for location based services that utilizes collected movement data to identify parts of the user trajectories, where user privacy is at an elevated risk. To protect the privacy of the ...

    • A hybrid approach to frequent itemset hiding 

      Gkoulalas-Divanis, A.; Verykios, V. S. (2007)
      In this paper, we propose a novel, exact border-based approach that provides an optimal solution for the hiding of sensitive frequent itemsets by (i) minimally extending the original database by a synthetically generated ...

    • A k-anonymity model for spatio-temporal data 

      Zacharouli, P.; Gkoulalas-Divanis, A.; Verykios, V. S. (2007)
      The unprecedented growth In Location-Based Services (LBS) take-up along with the continuously increasing storage capabilities of modern systems, and have facilitated the collection of information related to users activities ...

    • Learning objects and learning services in the semantic web 

      Hartonas, C.; Gana, E. (2008)
      With the development of the web and the intense research for a semantic web, the need arises for standardized and rigorous semantic specification both of Services on the semantic web and of the objects and processes that ...

    • Multicast transmission over IEEE 802.11n WLAN 

      Papathanasiou, C.; Tassiulas, L. (2008)
      With the advent of low-cost WLAN devices, the delivery of multimedia content is highly desirable. Such applications require high throughput and near-real time for quality viewing. The use of next-generation WLAN 802.11n ...

    • "SEE and SEE": An educational tool for kids with hard of hearing 

      Petrantonakis, P.; Kosmidou, V.; Nikolaraizi, M.; Koutsogiorgou, S.; Hadjileontiadis, L. J. (2008)
      An educational software, namely "SEE and SEE", that aims to enhance literacy skills of deaf or hard of hearing children is presented in this paper. The proposed computer-based educational environment, takes into account ...