Researh and publications

Research papers

  • Plessas, A., Stefanis V., Komninos A., Garofalakis J. (2016). "Field evaluation of context aware adaptive interfaces for efficient mobile contact retrieval", In Pervasive and Mobile Computing, Elsevier final version
  • Plessas, A., Georgiadou O., Stefanis V., Garofalakis J., & Komninos A. (2015). "Assessing Physical Location as a Potential Contextual Cue For Adaptive Mobile Contact Lists." 14th IEEE International Conference on Ubiquitous Computing and Communications. Liverpool, UK, IEEE final version
  • Komninos, A., Astrantzi I-M., Plessas A., Stefanis V., & Garofalakis J. 2014 "Non-verbal Audio and Tactile Mobile Navigation - A comparative evaluation of two novel prototypes" The Seventh IEEE International Workshop on Selected Topics in Wireless and Mobile computing (STWiMob 2014) final version
  • Vassileios Stefanis, Athanasios Plessas, Andreas Komninos, John Garofalakis. 2013. "Frequency and recency context for the management and retrieval of personal information on mobile devices" In Pervasive and Mobile Computing, Elsevier final version
  • Andreas Komninos, Vassileios Stefanis, Athanasios Plessas, Jeries Besharat. 2013. "Capturing Urban Dynamics with Scarce Check-In Data" In Pervasive Computing, IEEE final version
  • Vassilios Stefanis, Andreas Komninos, Athanasios Plessas, and John Garofalakis. 2013. "An interface for context-aware retrieval of mobile contacts" In Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services (MobileHCI '13). ACM, New York, NY, USA, 492-497 final version
  • Athanasios Plessas, Vassilios Stefanis, Andreas Komninos and John Garofalakis. 2013. "Using communication frequency and recency context to facilitate mobile contact list retrieval" In International Journal of Handheld Computing Research (IJHCR) (online version)
  • Vassilios Stefanis, Athanasios Plessas, Andreas Komninos, and John Garofalakis. 2012. "Patterns of usage and context in interaction with communication support applications in mobile devices" In Proceedings of the 14th international conference on Human-computer interaction with mobile devices and services (MobileHCI '12). ACM, New York, NY, USA, 25-34. final version
  • Vassilios Stefanis, Athanasios Plessas, Andreas Komninos, John Garofalakis, "Efficient Support of Context-Driven Interfaces for Mobile Devices", 16th Panhellenic Conference on Informatics (PCI '12). 363–368. final version (pdf).
  • Andreas Komninos, Peter Barrie, Vassilios Stefanis, and Athanasios Plessas. 2012. "Urban exploration using audio scents". In Proceedings of the 14th international conference on Human-computer interaction with mobile devices and services (MobileHCI '12). ACM, New York, NY, USA, 349-358. final version
  • Andreas Komninos, Athanasios Plessas, Vassilios Stefanis, John Garofalakis, "Context Dimensionality Reduction For Mobile Personal Information Access", KDIR - International Conference on Knowledge Discovery and Information Retrieval, 26-29 October, Paris, France, 2011 final version (pdf), online version
  • Α. Plessas, V. Stefanis, A. Komninos, and J. Garofalakis, Dimensionality Reduction in Context-Aware Systems, IEEE Pervasive Computing Magazine - Work in Progress Section, July - September 2011 (vol. 10 no. 3), pp. 52-53, final version
  • A. Komninos, A. Plessas, V. Stefanis, J. Garofalakis, Application of Dimensionality Reduction Techniques for Mobile Social Context, 13th International Conference on Ubiquitous Computing (Ubicomp 2011), September 17–21, Beijing, China, 2011 final version
  • J. Garofalakis, A. Koskeris, S. Michalopoulos, A. Plessas and V. Stefanis, A Web and mobile-based system for the coordination of civil protection authorities and population warning, The 1st International Conference on Safety and Crisis Management in the Construction, Tourism and SMEs Sectors, 24 - 28 June, Nicosia, Cyprus, 2011 final version (pdf), Presentation slides (pdf)
  • J. Garofalakis, A. Koskeris, A. Plessas and V. Stefanis, "An Integration Platform of Social Networking Applications to Support Life Long Learning in Rural Territories: the "SoRuraLL Virtual Learning World" Environment", Social Applications for Life Long Learning, 4-5 November, 2010, Patras, Greece final version (pdf)
  • John Garofalakis, Antonia Stefani, Vassilios Stefanis, " A Framework for the Quality Evaluation of B2C m-commerce services", International Journal of Handheld Computing Research (IJHCR), 2010 IGI Global
  • John Garofalakis, Vassilios Stefanis, "Quality Evaluation of B2C m-commerce Using the ISO9126 Quality Standard", Handheld Computing for Mobile Commerce: Applications, Concepts and Technologies, IGI Global, ISBN-13: 978-1615207619, 2010, IGI Global, Amazon.com
  • John Garofalakis, Flora Oikonomou, Vasilios Stefanis, "System’s Design and Implementation for Easy Creation of Mobile Commerce Systems", ICIW '08 - The Third International Conference on Internet and Web Applications and Services, June 8-13, 2008 - Athens, Greece, pp. 115 - 120 Final Version
  • John Garofalakis, Vassilios Stefanis, "MokE: a tool for Mobile-ok evaluation of Web Content", W4A2008 - Technical, April 21-22, 2008, Beijing, China. Co-Located with the 17th International World Wide Web Conference, pp. 57 - 64 Final Version, pre-print version (pdf)
  • John Garofalakis, Antonia Stefani, Vassilios Stefanis and Michalis Xenos, "Quality Attributes Of Consumer Based m-Commerce Systems", ICETE/ICE-B 2007, pp. 130 - 136 Final Version
  • Christos Mettouris, John Garofalakis, Vassilios Stefanis, "Detection of users position based on Bluetooth technology and support of m-commerce applications", PCI2007, pp. 323 – 335, Best Student paper Award. Final Version
  • John Garofalakis, Vassilios Stefanis, "Using RSS feeds for effective mobile web browsing", Universal Access in the Information Society Journal, Volume 6, Number 3, pages 249-257, Springer 2007 Final Version, pre-print version (pdf)
  • Alexander Blekas, John Garofalakis, Vassilios Stefanis, "Use of RSS feeds for Content Adaptation in Mobile Web Browsing", International Cross-Disciplinary Workshop on Web Accessibility, WWW2006, pp. 79 – 85, Final Version, pre-print version (pdf)

Ph.D. Thesis
Title: Adaptive interfaces using social context awareness to support personal information retrieval on mobile computing devices
Advisor: John Garofalakis
Full text available: http://nemertes.lis.upatras.gr/jspui/handle/10889/8687

M.Sc. Thesis
Title: Design and implementation of a system for evaluating the content and the structure of mobile web sites
Advisor: John Garofalakis
Full text available: http://nemertes.lis.upatras.gr/jspui/handle/10889/700

Abstract:During the last years the access to the Web, not only from desktop PCs but from mobile devices too, such as mobile phones and PDAs, is a fact. Furthermore, in developing countries the number of users that browse the Web through mobile devices is larger than the number of users that browses the web from desktop PCs. Also, the creation of web content is much easier, due to a large number of applications that promise the fast and easy creation of web content without demanding special knowledge from their users. The question is which characteristics the web sites and their content should have in order to improve the user experience when accessed from mobile devices.
The World Wide Web Consortium (W3C) has gathered the practices for delivering Web content to mobile devices (Mobile Web Best Practices). Those practices are strongly recommended because of the limitations of mobile devices. Those limitations are the small screen size, the inputting text method, the available memory, the small computational power and the power consumption.
W3C, based on the above practices, has published a set of tests that refer to the structure and the content of a web page. Web pages which pass the tests provide a functional user experience for users of mobile devices. Some of the practices define tests that are machine verifiable and others tests that require the human judge as well.
In this thesis at first the W3C Mobile Web Best practices are presented. Then, a system for the evaluation of the content and the structure of mobile web sites was designed and implemented. Purpose of the system is the analysis of a web site, the crawling of its web pages and the check of every web page against the W3C tests. The final goal of the system is to provide a report and a rating for the whole web site. Also, a module for crawling and evaluating content of the web site that is part of the "hidden web" is provided. Finally, the system's users may put weights of importance to each W3C test.

Diploma thesis
Title: Studying, implementation and testing of algorithms for content adaptation in mobile web browsing
Advisor: John Garofalakis