Browsing Articles by Title

Now showing items 50-69 of 69

  • Radio Propagation in Industrial Wireless Sensor Network Environments: From Testbed to Simulation Evaluation 

    Zinonos, Zinon; Vassiliou, Vasos; Christofides, Tasos C. (ACM, 2012)
    In recent years, sensor networks characteristics have led to incremental utilization in different types of applications. Several techniques have been proposed to evaluate the performance of WSNs; the two most popular being ...

  • Randomblocks: A transparent, verifiable blockchain-based system for random numbers 

    Christodoulou, Klitos; Chatzichristofis, Savvas A.; Sirakoulis, Georgios Ch.; Christodoulou, Panayiotis (Old City Publishing, Inc, 2019)
    Games-of-chance require high-levels of trust between participants that is often uncertain and difficult to enforce. The unique characteristics introduced by the blockchain technology can be leveraged to inform a verifiable ...

  • Real-time adaptive multi-robot exploration with application to underwater map construction 

    Kapoutsis, Athanasios Ch.; Chatzichristofis, Savvas A.; Doitsidis, Lefteris; Borges de Sousa, João; Pinto, Jose; Braga, Jose; Kosmatopoulos, Elias B. (Springer, 2016)
    This paper deals with the problem of autonomous exploration of unknown areas using teams of Autonomous X Vehicles (AXVs)—with X standing for Aerial, Underwater or Sea-surface—where the AXVs have to autonomously navigate ...

  • Real-time indexing for large image databases: color and edge directivity descriptor on GPU 

    Bampis, Loukas; Iakovidou, Chryssanthi; Chatzichristofis, Savvas A.; Boutalis, Yiannis S.; Amanatiadis, Angelos (Springer, 2014)
    In this paper, we focus on implementing the extraction of a well-known low-level image descriptor using the multicore power provided by general-purpose graphic processing units (GPGPUs). The color and edge directivity ...

  • A Real-time Targeted Recommender System for Supermarkets 

    Christodoulou, Panayiotis; Christodoulou, Klitos; Andreou, Andreas S. (SciTePress-Publication, 2017)
    Supermarket customers find it difficult to choose from a large variety of products or be informed for the latest offers that exist in a store based on the items that they need or wish to purchase. This paper presents a ...

  • Remote monitoring of the Bactrocera oleae (Gmelin) (Diptera: Tephritidae) population using an automated McPhail trap 

    Doitsidis, Lefteris; Fouskitakis, George N.; Varikou, Kyriaki N.; Rigakis, Iraklis I.; Chatzichristofis, Savvas A.; Papafilippaki, Androniki K.; Birouraki, Athanasia E. (Elsevier, 2017-05)
    Remote pest population monitoring is of major importance within the context of precision agriculture. Information acquired from the field has been proved essential for proper decision making and pest management against ...

  • Revealing the political affinity of online entities through their Twitter followers 

    Stamatelatos, Giorgos; Gyftopoulos, Sotirios; Drosatos, George; Efraimidis, Pavlos S. (Elsevier Ltd., 2020-03)
    In this work, we show that the structural features of the Twitter online social network can divulge valuable information about the political affinity of the participating nodes. More precisely, we show that Twitter followers ...

  • S-GinMob: Soft-Handoff Solution for Mobile Users in Industrial Environments 

    Zinonos, Zinon; Vassiliou, Vasos (IEEE, 2011)
    In current research studies and testbed deployments of sensor networks, individual sensor nodes are usually assumed to be static. However, recent applications require mobile sensor nodes, something that poses unique ...

  • Social Robots in Special Education: Creating Dynamic Interactions for Optimal Experience 

    Amanatiadis, A.; Kaburlasos, Vasileios G.; Dardani, Christina; Chatzichristofis, Savvas A.; Mitropoulos, Athanasios (IEEE, 2020-04-02)
    Recent research has proved the positive therapeutic impacts of robot interaction with children diagnosed with the autism spectrum condition. Until now, most of the evaluated treatment methods apply one-to-one sessions ...

  • Studying Affective Tutoring Systems for Mathematical Concepts 

    Mastrodimos, Dimitrios; Chatzichristofis, Savvas A. (Sage, 2019-07-02)
    Students face difficulties in learning mathematical processes. As a result, they have negative emotions toward mathematics. The use of technology is employed to change the student’s attitude toward mathematics. Some ...

  • Text localization using standard deviation analysis of structure elements and support vector machines 

    Zagoris, Konstantinos; Chatzichristofis, Savvas A.; Papamarkos, Nikos (Springer, 2011)
    A text localization technique is required to successfully exploit document images such as technical articles and letters. The proposed method detects and extracts text areas from document images. Initially a connected ...

  • Towards a Parallel Inference Hnchine: the APIH project 

    Vlahavas, J.; Pombortsis, A.; Stamatis, D. (Microprocessing and Microprogmmmlng, 1990-08)
    This paper gives an overview of the APIM (Aristotle Parallel Inference Machine) research project, which aims to the design of a new multiprocessor architecture for the parallel execution of logic programs. The APIM system ...

  • Towards privacy in personal data management 

    Efraimidis, Pavlos S.; Drosatos, Georgios; Nalbadis, Fotis; Tasidou, Aimilia (2009)
    Purpose – In order to enhance privacy protection during electronic transactions, the purpose of this paper is to propose, develop, and evaluate a personal data management framework called Polis that abides by the following ...

  • User-Centric Privacy-Preserving Statistical Analysis of Ubiquitous Health Monitoring Data 

    Drosatos, George; Efraimidis, Pavlos S. (ComSIS Consortium, 2014)
    In this paper, we propose a user-centric software architecture for managing Ubiquitous Health Monitoring Data (UHMD) generated from wearable sensors in a Ubiquitous Health Monitoring System (UHMS), and examine how these ...

  • Versatile Query Scrambling for Private Web Search 

    Arampatzis, Avi; Drosatos, George; Efraimidis, Pavlos S. (Springer Link, 2015-05-16)
    We consider the problem of privacy leaks suffered by Internet users when they perform web searches, and propose a framework to mitigate them. In brief, given a ‘sensitive’ search query, the objective of our work is to ...

  • Vision-Controlled Micro Flying Robots: From System Design to Autonomous Navigation and Mapping in GPS-Denied Environments 

    Scaramuzza, Davide; Achtelik, Michael; Doitsidis, Lefteris; Fraundorfer, Friedrich; Kosmatopoulos, Elias; Martinelli, Agostino; Achtelik, Markus Wilhelm; Chli, Margarita; Chatzichristofis, Savvas A.; Kneip, Laurent; Gurdan, Daniel; Heng, Lionel; Lee, Gim Hee; Lynen, Simon; Meier, Lorenz; Pollefeys, Marc; Renzaglia, Alessandro; Siegwart, Roland; Stumpf, Jan Carsten; Tanskanen, Petri; Troiani, Chiara; Weiss, Stephan (IEEE, 2014)
    Autonomous micro helicopters are about to play a major role in tasks like search and rescue, environment monitoring, security surveillance, inspection, etc. If they are further realized in small scale, they can also be ...

  • Water Supply Optimization: An IPA Approach 

    Heracleous, Constantinos; Zinonos, Zinon; Panayiotou, Christos G. (Elsevier, 2014)
    In this paper we address the problem of deciding whether a water source should be used by a water utility such that the production cost as well as the penalty cost due to water shortages is minimized while certain ...

  • What, Where and How? Introducing pose manifolds for industrial object manipulation 

    Kouskouridas, R.; Amanatiadis, A.; Chatzichristofis, Savvas A.; Gasteratos, A. (Elsevier, 2015)
    In this paper we propose a novel method for object grasping that aims to unify robot vision techniques for 24 efficiently accomplishing the demanding task of autonomous object manipulation. Through ontological 25 concepts, ...

  • Wireless sensor networks mobility management using fuzzy logic 

    Zinonos, Zinon; Chrysostomou, Chrysostomos; Vassiliou, Vasos (Elsevier, 2014)
    This paper presents a novel, intelligent controller to support mobility in wireless sensor networks. In particular, the focus is on the deployment of such mobility solution to critical applications, like personnel safety ...

  • Θεολογία, φιλοσοφία και επιστήμη κατά τους τρεις Ιεράρχες 

    Martzelos, Georgios (2013)
    Οι Τρεις Ιεράρχες που καθιερώθηκαν δικαίως στη νεώτερη ιστορία του Ελληνικού Έθνους ως οι προστάτες και στυλοβάτες της ελληνικής παιδείας αποτελούν για όλους μας, εκπαιδευτικούς και εκπαιδευομένους, πηγή εμπνεύσεως και ...