Papers by Author: Mebarek Djebabra

Abstract: The activities of companies are executed according to the integration of multiple internal and external tensions in different communities and various branches of industry. In this context, innovations seem necessary to remain effective and to adapt itself to the constant evolutions of the markets. Sustainable development can be an opportunity to throw policy of innovation and place the sustainable development in the heart of strategic reflection of the company. Therefore, it constitutes an indispensable asset to strengthen the dialogue and the opening on the word in which we evolve. The integration of the idea of durability in the food processing industry by the implementation of a common system of management of the risks according to the food codex and by means of the method HACCP (Hazard Analysis and Critical Control points) aims at ensuring a better quality of life through the implementation of actions centered on health, by the control of the food chains. Our contribution, which becomes integrated into context, consists in bringing to light the factor health as a pillar into interface with the other themes to know the social, the economy and the environment.

Abstract: The generation of plasmas and the initiation of electrical breakdown are realized by the phenomenon of electrical discharge which is provoked when we apply a sufficient electric field in a gas. Consequently the free charges are accelerated, new charged particles are created and others are destructed. This can be ranged in four phenomena: elastic collision (recombination), attachment, excitation and ionization. The aim of this paper is to study the basic phenomena in an electrical discharge in the case of Oxygen O₂. Monte Carlo Simulation is used to follow the random trajectory of free charges determining in each path many parameters of the discharge. To determinate electrical and physical parameters, we have used the sampling laws. The spatial distributions of space charges (electrons, positive and negative ions) are also obtained. The determination of electrical field depends on distributions of charged particles obtained by solving the Maxwell equations.