• Conference Object  

      Adapting generic web structures with semantic web technologies: A cognitive approach 

      Belk, Marios; Germanakos, Panagiotis; Tsianos, Nikos; Lekkas, Zacharias; Mourlas, Constantinos; Samaras, George S. (2010)
      The research described in this paper focuses on adapting generic Hypermedia Environments with the use of Semantic Web technologies. The use of machine understandable semantics in Web applications is increasing significantly, ...
    • Conference Object  

      Adaptivity considerations for enhancing user-centric web experience 

      Belk, Marios; Germanakos, Panagiotis; Zaharias, Panagiotis; Samaras, George S. (2012)
      User Experience (UX) design relates to the creation of models that affect user experiences during interaction with a system, while the incorporation of cognitive factors in the personalization process of Web systems might ...
    • Conference Object  

      CogniMouse: On detecting users' task completion difficulty through computer mouse interaction 

      Belk, Marios; Portugal, D.; Christodoulou, Eleni; Samaras, George S. (Association for Computing Machinery, 2015)
      This paper presents a method for analyzing users' computer mouse interaction data with the aim to implicitly identify task completion difficulty while interacting with a system. Computer mouse motion streams and users' ...
    • Article  

      CogniWin – a virtual assistance system for older adults at work 

      Hanke, S.; Meinedo, H.; Portugal, D.; Belk, Marios; Quintas, J.; Christodoulou, Eleni; Sili, M.; Dias, M. S.; Samaras, George S. (2015)
      This paper presents an innovative virtual assistant system, which aims to address older adults’ needs in a professional environment by proposing promising and innovative virtual assistance mechanisms. The system, named ...
    • Conference Object  

      CogniWin: An integrated framework to support older adults at work 

      Portugal, D.; Dias, M. S.; Christodoulou, Eleni; Belk, Marios; Quintas, J.; Samaras, George S.; Hanke, S.; Müllner-Rieder, M.; Glauser, C.; Snene, M.; Konstantas, D. (CEUR-WS, 2016)
      Assisting older adults at work is of critical importance in nowadays fast-emerging computerized environments. Therefore, it is paramount to provide support to mitigate age-related cognitive degradation and to relieve their ...
    • Conference Object  

      A computer mouse for stress identification of older adults at work 

      Belk, Marios; Portugal, D.; Germanakos, Panagiotis; Quintas, J.; Christodoulou, Eleni; Samaras, George S. (CEUR-WS, 2016)
      Stress is an unpleasant condition that entails negative emotions such as fear, worry and nervousness. Motivated by existing research that accompanies stress with physical reactions like increased heart rate, blood volume, ...
    • Article  

      Data-driven user profiling to support web adaptation through cognitive styles and navigation behavior 

      Germanakos, Panagiotis; Papatheocharous, Efi; Belk, Marios; Samaras, George S. (2012)
      This paper aims to analyze human navigation behavior and identify similarities of cognitive styles using measures obtained from psychometric tests. Specific navigation metrics are utilized to find identifiable groups of ...
    • Article  

      Do human cognitive differences in information processing affect preference and performance of CAPTCHA? 

      Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2015)
      A Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a widely used security defense mechanism that is utilized by service providers to determine whether the entity interacting with their ...
    • Book Chapter  

      A dynamic user centric framework for enhancing eservices effectiveness aiming at mass customization 

      Belk, Marios; Germanakos, Panagiotis; Tsianos, Nikos; Lekkas, Zacharias; Mourlas, Constantinos; Samaras, George S. (IGI Global, 2009)
      Mass customization should be more than just configuring a specific component (hardware or software), but should be seen as the co-design of an entire system, including services, experiences and human satisfaction at the ...
    • Conference Object  

      Embracing cognitive aspects in web personalization environments - The adaptiveweb architecture 

      Germanakos, Panagiotis; Tsianos, Nikos; Lekkas, Zacharias; Mourlas, Constantinos; Belk, Marios; Samaras, George S. (2007)
      This paper presents a Web adaptation and personalization architecture that uses cognitive aspects as its core filtering element. The innovation of the proposed architecture focuses upon the creation of a comprehensive user ...
    • Article  

      Embracing cognitive factors and Fuzzy Logic in adaptive interactive systems 

      Papatheocharous, Efi; Belk, Marios; Germanakos, Panagiotis; Samaras, George S. (2013)
      The increased demand of services on the Web to satisfy the diverse characteristics of users have resulted in a plethora of applications that aim to provide personalized services based on the heterogeneous needs and preferences ...
    • Conference Object  

      Employing virtual worlds for HCI education: A problem-based learning approach 

      Zaharias, Panagiotis; Belk, Marios; Samaras, George S. (2012)
      In this paper we describe our experience focused on teaching an introductory course in HCI by employing a 3D virtual world. Our main pedagogical philosophy is presented which claims that problem-based learning activities ...
    • Conference Object  

      Enhancing e-learning environments with users' cognitive factors: The case of EKPAIDEION 

      Tsianos, Nikos; Germanakos, Panagiotis; Lekkas, Zacharias; Mourlas, Constantinos; Belk, Marios; Christodoulou, Eleni; Spanoudis,George C.; Samaras, George S. (Academic Conferences Limited, 2008)
      We are now witnessing an extensive and gradually increasing use of the World Wide Web space, proved to be a quite favourable way of communication, due to its speed, simplicity and efficiency. Distance learning (or eLearning) ...
    • Conference Object  

      Eye Gaze-driven Prediction of Cognitive Differences during Graphical Password Composition 

      Katsini, Christina; Fidas, Christos; Raptis, George E.; Belk, Marios; Samaras, George; Avouris, Nikolaos (Association for Computing Machinery, 2018)
      Evidence suggests that individual cognitive differences affect users' memorability, visual behavior, and graphical passwords' security. Such knowledge denotes the added value of personalizing graphical password schemes ...
    • Conference Object  

      FlexPass: Symbiosis of Seamless User Authentication Schemes in IoT 

      Belk, Marios; Fidas, Christos; Pitsillides, Andreas (Association for Computing Machinery, 2019)
      This paper presents a new user authentication paradigm which is based on a flexible user authentication method, namely FlexPass. FlexPass relies on a single, user-selected secret that can be reflected in both textual and ...
    • Conference Object  

      HAAPIE 2016: 1st international workshop on human aspects in adaptive and personalized interactive environments: Preface 

      Germanakos, Panagiotis; Belk, Marios; Samaras, George S.; Dimitrova, V. (CEUR-WS, 2016)
      Nowadays, the profound digital transformation has upgraded the role of the computational system into an intelligent multidimensional communication medium that creates new opportunities, competencies, models and processes. ...
    • Article  

      A human cognitive processing perspective in designing E-Commerce checkout processes 

      Belk, Marios; Germanakos, Panagiotis; Constantinides, Anthony G.; Samaras, George S. (2015)
      Designing a usable checkout process is of paramount importance for both E-Commerce and M-Commerce success. Aiming to understand human-computer interactions during checkout and improve the usability and user experience of ...
    • Conference Object  

      “I Recall this Picture”: Understanding Picture Password Selections based on Users’ Sociocultural Experiences 

      Constantinides, Argyris; Fidas, Christos; Belk, Marios; Pitsillides, Andreas (2019)
      Graphical passwords leverage the picture superiority effect to enhance memorability, and reflect today's haptic user interaction realms. Image content related to users' past sociocultural experiences assists users with the ...
    • Article  

      Identification of an individual’s frustration in the work environment through a multi-sensor computer mouse 

      Portugal, D.; Belk, Marios; Quintas, J.; Christodoulou, Eleni; Samaras, George S. (2016)
      Older adults traditionally face major challenges at work when it comes to dealing with new technological tools. A sense of overwhelm and frustration can quickly arise under these circumstances. Continuous negative feelings ...
    • Conference Object  

      IHIP: Towards a user centric Individual Human Interaction Proof framework 

      Fidas, Christos A.; Hussmann, H.; Belk, Marios; Samaras, George S. (Association for Computing Machinery, 2015)
      A Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a widely used Human Interaction Proof mechanism to protect on-line services against automated software agents. Nowadays, there is a ...