Konstantina Vassilopoulou

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Advances in electronic technologies offer e-learning applications the possibility to become skillful and acquire knowledge on a task. The purpose of this paper is twofold. First to review papers related to usability methods and learning theories currently used to design e-learning applications. Secondly, to draw on the author's experience from carrying out(More)
BACKGROUND Patients with psychosis have activation of the hypothalamic-pituitary-adrenal (HPA) axis during the acute phase of the psychosis. Whether this has any morphological consequences for the pituitary gland is currently unknown. AIMS To examine pituitary volume variation in people at different stages of psychotic disorder. METHOD Pituitary volume(More)
This paper uses the well-established 'uses and gratifications' theory in order to understand and categorize viewers' needs in the context of digital TV applications. The results of this analysis unveil that such needs can either be ritualized or instrumental. Furthermore, the uses and gratifications theory was applied in order to formulate a questionnaire(More)
The benefits of living in a fast changing information society become evident if effective e-business practices are implemented, offering companies exposure and access to global markets and consumer access to customized, high quality services. Such practices are facilitated by innovative and effective e-business models. However, the business literature(More)
This paper evaluates and draws thematic priorities from current IST projects and relevant research for implementing successful business models. These thematic priorities will be described in more detail and will be used to identify " e-factors " , that is, factors of broad and sustainable adoption of e-business models. The paper is based on current work of(More)
BACKGROUND Volumetric studies examining brain structure in depression subtypes are limited and inconclusive. The aim of the current study was to compare the volumes of brain regions previously implicated in depression among patients with melancholic major depressive disorder (MDD), patients with psychotic MDD and normal controls. METHODS Twenty two(More)
The last decade has brought phenomenal changes in the use of television. The growth rate of digital television leads one to think that it is increasingly becoming an important medium. With the DTV emerging as a major interactive channel, innovative interactive services that will be offered could affect audience perceptions and preferences. While these(More)
Elderly suicide rates are the highest of any age group. Greece is among the countries with the highest proportion of elderly people in the European Union (EU). Elderly suicide victims seem to possess different characteristics. Aim of our study was to elucidate the different characteristics of elderly suicide victims. Data was collected from a two-year(More)