George F. Fragulis

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A closed formula is given, which allows the determination of the impulsive solutions of Linear Homogeneous Matrix Differential Equations (L.H.M.D.E.) directly in terms of finite and infinite spectral data of the associated polynomial matrix. Specifically the notions of finite and infinite Jordan pairs for a general polynomial matrix are defined and it is(More)
The purpose of this work is to provide access to meteorological data as well as information of the status of air quality for the city of Kozani in real time with a userfriendly interface. The application has been developed using only open source software . MySQL has been used as a relational database management system, PHP as the scripting language for the(More)
An operational monitoring, as well as high resolution local-scale meteorological and air quality forecasting information system for Western Macedonia, Hellas, has been developed and is operated by the Laboratory of Atmospheric Pollution and Environmental Physics / TEI Western Macedonia since 2002, continuously improved. In this paper the novelty of(More)
This paper describes the dynamic seminar management system named ”e-Sem”, developed according to the opensource software philosophy. Due to its dynamic management functionality, it can equally adapt to any education environment (Primary, Secondary, Tertiary). The purpose of the proposed dynamic system is ease of use and handling, by any class of users,(More)
S.A.T.E.P.: Synchronous-Asynchronous Tele-education Platform is a software application for educational purposes, with a lot of parametrizing (configuration) features written entirely from scratch. It aims at the training and examination of computer skills, a platform that can be adjusted to the needs of each lesson. In the application the trainer and the(More)
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