%0 Journal Article %J Networking and Information Systems Journal, Hermes Science Publishing, Volume 2, No. 5-6 %D 1999 %T On-Demand Hypermedia/Mutimedia Service using Pre-Orcestrated Scenarios over the Internet %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A D Moiras %A V Ouzounis %A A Tatakis %X In this paper we present a unified approach for delivering hypermedia/multimedia objects over broadband networks. The described service consists of several multimedia servers and a set of functions that intend to present to the end user interactive information in real-time. The hypermedia documents are structured using a hypermedia markup language that keeps information of the spatiotemporal relationships among document’s media components. In order to deal with the variant network behavior, buffering manipulation mechanisms and grading of the transmitted media quality techniques are proposed to smooth presentation and synchronization anomalies. %B Networking and Information Systems Journal, Hermes Science Publishing, Volume 2, No. 5-6 %P 741 - 762 %G eng %0 Conference Paper %B Workshop on Internet Programming Languages(in conjunction with 1998 IEEE International Conference on Programming Languages), Chicago, Illinois, USA %D 1998 %T Implementing spatio-temporal relations for hypermedia presentations using an HTML-like language %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A D Moiras %A V Ouzounis %A A Tatakis %X Hypermedia is currently the trend in delivering information composed of various forms of media. Up to now most systems lack the ability to present the user with hypermedia information containing various media that have specific spatio-temporal relations. In this paper we propose and describe a model that can describe such kinds of hypermedia presentations. The core of the model is an HTML-like language that supports tags for the description of timing relations between the information objects that compose a hypermedia presentation. %B Workshop on Internet Programming Languages(in conjunction with 1998 IEEE International Conference on Programming Languages), Chicago, Illinois, USA %8 13 May %G eng %0 Conference Paper %B The Eighth International ACM Hypertext Conference-Hypertext 97, Southampton, UK %D 1997 %T An HTML like language supporting time-depended transmission of hypermedia %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A A Tatakis %B The Eighth International ACM Hypertext Conference-Hypertext 97, Southampton, UK %8 6 - 11 April %G eng %0 Journal Article %J Journal of Educational Technology Review - ETR, AACE, No. 7 %D 1997 %T Using Multimedia/Hypermedia Tools over Networks for Distance Education and Training %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A P Lampsas %A A Tatakis %A S Kontogiannis %A D Fotakis %X The rapid developments in the Information Technology sector as well as the deployment of faster networks brings us to the era of the New Information Technology (NIT). The citizen of the near future must be able to use them else he will be seriously handicapped in his everyday life. Thus NIT becomes part of the educational process while on the other hand offers the tools and the infrastructure for the establishment of the distance education process. The educators are one of the first professions that must learn to use NIT and its tools. Multimedia/hypermedia tools offer solutions to the problems posed by the distance education process. They can be user-friendly and enticing and they can cover most, if not all, the needs of their users. A lot of prototype systems (tools) for distance education have been developed, each offering a number of functions that aid the process of distance education. The rapid growth of World Wide Web is adding another factor that can lead to the wider deployment of distance education systems. Although the value of distance education is unquestionable there is still a lot of work to be done before a wide spread implementation platform emerges. %B Journal of Educational Technology Review - ETR, AACE, No. 7 %P 20 - 26 %8 Summer %G eng %0 Conference Paper %B 1996 Concurrent Engineering Europe, Cambridge, UK %D 1996 %T FINE:Implementation of a Distributed Telematics Environment for Clinical Engineers %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A A Tatakis %A D Fotakis %A P Balaouras %A L Chadelis %A N Palikarakis %A R Sandalatzopoulos %B 1996 Concurrent Engineering Europe, Cambridge, UK %P 56 - 60 %8 10 -12 April %G eng %0 Conference Paper %B ED-TELECOM 96, Boston, USA %D 1996 %T An Interactive Cooperative Teleworking Environment-Tηλεµάθεια ∗ %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A P Lampsas %A A Tatakis %A S Kontogiannis %A D Fotakis %A K Kyriakou %X

In this paper we present the design and the implementation of an interactive environment for cooperative teleworking. Telemathea offers tools that support the communication and the teleworking between tutor and trainee, who may reside in remote geographical regions. This environment offers audio communication over the network as well as support for joint editing of text documents and still images. It supports different audio coding techniques so as to adjust to the available bandwidth, and makes use of the RTP protocol in order to facilitate the exchange of audio and, in the future, video packets.

%B ED-TELECOM 96, Boston, USA %P 37 - 42 %8 17 - 22 June %G eng %0 Conference Paper %B 5th IEEE International Symposium On High Performance Distributed Computing-HPDC-5, Syracuse, New York, USA %D 1996 %T On-Demand Hypermedia/Multimedia Service over Broadband Networks %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A D Moiras %A V Ouzounis %A A Tatakis %X In this paper we present a uni ed approach for de- livering hypermedia/multimedia objects over broadband networks. Documents are stored in various multimedia servers, while the inline data may reside in their own media servers, attached to the multimedia servers. The described service consists of several multimedia servers and a set of functions that intend to present to the end user interactive information in real-time. Users interact with the service requesting multimedia docu- ments on demand. Various media streams are trans- mitted over di erent parallel connections according to their transmission requirements. The hypermedia doc- uments are structured using a hypermedia markup lan- guage that keeps information of the spatiotemporal re- lationships among document's media components. In order to deal with the variant network behavior, bu ering manipulation mechanisms and grading of the transmitted media quality techniques are proposed to smooth presentation and synchronization anomalies. %B 5th IEEE International Symposium On High Performance Distributed Computing-HPDC-5, Syracuse, New York, USA %P 224 - 231 %8 6 - 9 August %G eng %0 Conference Paper %B ED-MEDIA 95, Gratz, Austria %D 1995 %T HIPPOCRATES: A multimedia tool for distance education %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A P Lampsas %A A Tatakis %A D Fotakis %A G Papoutsopoulos %X In this paper we present a software tool for the realisation of the distance education service, that is the conduction of classes through the use of computers. The classes are directed towards personnel in various areas and aim at the retraining and update of the personnel in subjects of special interest in their line of work. The conduction of classes takes place, from and towards, remote regions with the aid of a computer network. Hippocrates is a flexible and easy-to-use application, which permits students, who sit in front of remotely situated workstations, to attend classes or seminars given by a teacher or expert, who can also be located in some remote geographical area. Hippocrates can be thought of as a distributed transparency projector. The teacher can project transparencies on the screens of the students’ workstations and can emphasize or indicate regions of interest on them by using the graphical tools offered by Hippocrates. Immediate results of the use of Hippocrates are the fast updating of the personnel in remote areas and the upgrading of the quality of the services they offer. %B ED-MEDIA 95, Gratz, Austria %P 103 - 108 %8 17 - 21 June %G eng %0 Conference Paper %B 10th International Symposium on Computers and Information Sciences-ISCIS X, Izmir, Turkey %D 1995 %T Multilingual Implementations of OSI Applications %A Christos Bouras %A Vaggelis Kapoulas %A Paul Spirakis %A P Lampsas %A A Tatakis %A S Kontogiannis %A D Fotakis %X In this work the problem of supporting multilingual environments over OSI applications is addressed. Initially a solution based on the idea of using multilingual structures and transcription techniques is presented. Another solution based on the major principles of the former follows, which exploits the coding of all of character sets uniformally. %B 10th International Symposium on Computers and Information Sciences-ISCIS X, Izmir, Turkey %P 367 - 374 %8 30 October - 1 November %G eng