Alex Vakaloudis

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The composition of 3D presentations is a complicated procedure partly facilitated by the introduction of VRML. VRML does not yet support 3D object storage and querying thus introducing limitations to object reusability. Presentations have to be built from scratch while the necessary information exists already from previous work. This paper presents a method(More)
Cloud Computing is currently one of the most widely-spoken terms in IT. While it offers a range of technological and financial benefits, its wide acceptance by organizations is not yet wide spread. Security concerns are a main reason for this and this paper studies the data and network threats posed in both traditional and cloud paradigms in an effort to(More)
The introduction of VRML has facilitated the production of virtual worlds. Apart from being a format for defining 3D geometries, VRML also provides the foundation for specifying interactive behaviour. However this mechanism is rather primitive, there is no direct modelling for composite events or conditions and no efficient treatment of time. The approach(More)
Smart glasses have lately been under the spotlight for a variety of technical and usability reasons. Despite the current (early 2015) freeze of Google Glass sales, the area is active with other big companies involved in the development of smart glass devices-at the same time remains in early stages and fragmented. We undertake a technical study of these(More)
Setting up a system to broadcast live lectures on the web is a procedure which on the surface does not require any serious technical skills mainly due to the facilities provided by popular LMS and their plugins. Nevertheless, producing a system of outstanding quality is a multidisciplinary and by no means a straightforward task. This complicatedness may be(More)
Lately a new generation of application domains is emerging. Such applications, heavily dynamic and interactive, include interactive multimedia applications, virtual reality worlds, digital movies and 3D animations. They deal with intensive spatio-temporal dependencies between the participating objects with motion becoming a central issue. Indeed in the(More)
The familiar paradigm of authentication by means of a textual username and password has been questioned for some years but it is only relatively recently, with the advent of technological advances in such areas as biometric and gesture recognition that truly alternative approaches to authentication have become feasible. The primary difference between(More)
Although internships contribute to the professional development of a junior engineer, it is not straightforward to achieve a fruitful outcome for either the intern or the hosting the organisation. We discuss a structured framework based on Agile and Scrum concepts with the goal of providing in a flexible manner a mixture of communication, technical and(More)