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Menassel R.,Annaba University | Nini B.,Larbi Ben idi University | Mekhaznia T.,University of Tébessa
ACM International Conference Proceeding Series | Year: 2016

The fractal image compression is a recent tool for encoding natural images. It builds on the local self-similarities and the generation of copies of blocks based on mathematical transformations. The technique seems interesting in both theory and application but have a drawback renders in real time usage due to the high resource requirement when encoding wide data. By another way, heuristics algorithms represent a set of approaches used to solve hard optimization tasks with rational resources consumption. They are characterized with their fast convergence and reducing of research complexity. The purpose of this paper is to provide, and for a first time, more detailed study about the Wolf Pack Algorithm for the fractal image compression. The performed experiments showed its effectiveness in the resolution of such problem. Moreover, a brief comparison with the exhaustive search establishes this advantage. © 2016 ACM.

Boudjouada M.,University of Mentouri Constantine | Salhi R.,University of Mentouri Constantine | Bekhbekh S.,University of Mentouri Constantine | Kabouche A.,Larbi Ben idi University | Gherraf N.,Larbi Ben idi University
Asian Journal of Chemistry | Year: 2016

The aim of the present work was to search a convenient, simple and inexpensive method to determine the metals in electroplating hydroxide sludges. The analytical methods are characterized by sensitivity, selectivity and accuracy but for economic reasons and of course the availability of equipments and products, the UV-visible spectrophotometry was used. We have undertaken the study of the influence of different cations present in the same solution on the determination of metal. After conducting several tests on solutions prepared in the laboratory and then on the solutions used to dissolve different samples of industrial waste, the result revealed that it is possible to use spectrophotometric method to assess the amount of metals in electroplating sludges, provided that we followed a welldefined scheme so as to avoid all the possible interference.

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