Hien D. Thai

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The paper presents the work that has been carried out trying to improve the behavior and the performances of DC to DC step up converters with high conversion ratio. Especially, it is studied how the design and the realization of the magnetic HF transformer can be improved in order to increase the global efficiency of hard switch isolated DC to DC(More)
This paper presents a new approach based on converter networks using elementary cells (ec). It deals with the beginning of research and development carried out on the design of the "ec", the random command and the magnetic coupling among the elementary cells. This paper introduces at first the recent works carried out on interleaved "ec" and power(More)
The digitalization of e-learning sources makes it an easy target for frauds, conterfeiting and content stealing. In this paper we present a new technique to deal with the security problems of e-learning content, its authentication and digital right management. The proposed technique is done by inserting a digital logo image, which serves as watermark(More)
The digitization of E-learning sources makes it an easy target for frauds, conterfeiting and content stealing. In this paper we present a new technique to deal with the security problems of e-learning content, its authentication and Digital Right Management The proposed technique is done by inserting a digital logo image, which serves as watermark signals,(More)
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