Efrosini Sourla

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The explosive growth in the size and use of the World Wide Web continuously creates new great challenges and needs. The need for predicting the users' preferences in order to expedite and improve the browsing though a site can be achieved through personalizing of the websites. A personalization mechanism is based on explicit preference declarations by the(More)
We present D-Tree, a dynamic deterministic structure for data management in decentralized networks, by engineering and further extending an existing decentralized structure. D-Tree achieves O(logN) worst-case search cost (N is the number of nodes in the network),O(logN) amortized load-balancing cost, and it is highly fault-tolerant. A particular strength of(More)
The heterogeneity of spatial planning data is a well known problem that admittedly limits its use and provokes numerous difficulties to planners, investors as well as decision makers. Spatial planning is confronted with a huge problem concerning the diversity in data collection, storing, processing and provision. These challenges constitute the main concern(More)
In this work, we propose D-Tree, a dynamic distributed deterministic structure for data management in decentralized networks. We present in brief the theoretical algorithmic analysis, in which our proposed structure is based on, and we describe thoroughly the key aspects of the implementation. Conducting experiments, we verify that the implemented structure(More)
Mobile App stores and marketplaces allow sellers and developers to monetize their Apps mainly through the desktop-based download point, or by using the mobile owner's credit card. We would like to turn monetization focus on the fact that there is already another payment channel that should not be overseen, which is fruitfully used through the premium SMSs.(More)
Artificial intelligence has significantly contributed in the evolution of medical informatics and biomedicine, providing a variety of tools available to be exploited, from rule-based expert systems and fuzzy logic to neural networks and genetic algorithms. Moreover, familiarizing people with smartphones and the constantly growing use of medical-related(More)