Articles
Σύνολο αποτελεσμάτων: 15, εμφανίζονται 1 - 10
Αποτελέσματα ανά σελίδα:  10  25  50  100
Ταξινόμηση ανά: Ημερομηνία · Επισκέψεις · Τίτλο
1 A reversible data hiding technique for embedding in the image histogram
Eleni Varsaki; Hellenic Open University Vassilis Fotopoulos; Hellenic Open University Athanassios Sk...
This work is about a data hiding technique based on the modification of the image histogram. It is fully reversible, that means, the original image can be recovered from the marked image, after the hi...
2007
2 An assessment methodology of educational software and its application on the educational content of Hellenic Open University (in Greek)
Georgios Aggelis Athanassia Vlassi Christos Koutsogiannis Spyros Krilis Maria Lagoudianaki Georgios ...
Η τεχνική αναφορά αυτή έχει ως θέμα της το Εναλλακτικό διδακτικό Υλικό των Πανεπιστημίων (Ε,Υ) και συγκεκριμένα του Ελληνικού Ανοικτού Πανεπιστημίου, και ειδικότερα πώς θα μπορούσε το λογισμικό που αν...
2007
3 Analysis, Design and Development of an Information System for the Calculation and Management of a Company’s Cash Flow
Alexandros G. Toutouzis; Hellenic Open University Grigorios N. Beligiannis; University of Ioannina,
This contribution deals with the analysis, design and development of an information system for the calculation and management of a company’s cash flow. The information and the follow-up of evolution a...
2009-10-07
4 Application of synchronous collaboration in the Computer Science course of Hellenic Open University (in Greek)
Michalis Xenos; Hellenic Open University Nikolaos Avouris; University of Patras Vassilis Komis; Univ...
Στο άρθρο αυτό παρουσιάζεται η εφαρμογή της σύγχρονης συνεργασίας από απόσταση (τηλε-συνεργασίας) στη Θεματική Ενότητα “Εισαγωγή στην Πληροφορική” στο Ελληνικό Ανοικτό Πανεπιστήμιο. Στο άρθρο παρουσιά...
2007
5 Building a combined micro/macro instruction set according to a modified definition of microprogramming.
Ousamma A. Hatoum; Lebanese International University, Beirut, Lebanon Khaldoun El-Khaldi; Notre Dame...
Dynamic and user microprogramming are usually used to refer to the same concept. In this paper, we will make a clear distinction between the two terms. User microprogramming was used by military appli...
2009-10-07
6 Complexity of a qualitative spatio-temporal logic
Khalil Raymond Chalita; Holy Spirit University of USEK, Jounieh, Lebanon,
In this paper we consider the problem of determining the complexity of a qualitative spatio-temporal language introduced by Wolter and Zakharyaschev, that combines the model of the regions RCC5 to the...
2009-10-07
7 Countering Unsolicited Calls in the Internet Telephony: An anti-SPIT Architecture
Panos Stamatiou; Hellenic Open University Dimitris Gritzalis; Dept. of Informatics of the Athens Uni...
Internet Telephony (Voice over Internet Protocol, VoIP), a telephony service which is based in packet transmission through IP networks, is becoming increasingly popular. Besides the obvious advantages...
2009-10-07
8 Cryptographically secured communication between tutors of the Computer Science course of the Hellenic Open University: Experiences from the introductory module‘Introduction to Computer Science’ (in Greek)
Yiannis Stamatiou; University of the Aegean Christos Pierrakeas; Hellenic Open University Michalis X...
Στο άρθρο αυτό γίνεται μια πρώτη προσπάθεια αποτύπωσης των αναγκών, των τρόπων αντιμετώπισής τους και των αποτελεσμάτων με στόχο την ασφαλή επικοινωνία μεταξύ τωνμελών των Ομάδων Διδακτικού Προσωπικού...
2007
9 Developing constructive m-learning activities for k-12 education: data and architectural issues
Thanasis Hadzilacos; Hellenic Open University Nectaria Tryfona; Aalborg University,
A new class of educational ICT-based activities is introduced based on experience from several projects with mobile technologies and constructivist ICT (Information and Communications Technology) usag...
2007
10 Discrete Wavelet Transform: An Introduction
Athanassios Skodras; Hellenic Open University,
In the present technical report the Discrete Wavelet Transform is introduced. The ztransform and the discrete Fourier transform along with their properties are first reviewed. Then the up-sampling and...
2007