Lamine Fall

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HIV type 1 (HIV-1) not only directly kills infected CD4(+) T cells but also induces immunosuppression of uninfected T cells. Two immunosuppressive proteins, interferon alpha (IFNalpha) and extracellular Tat, mediate this process because specific antibodies against these proteins prevent generation of suppressor cells in HIV-1-infected peripheral blood(More)
In this paper, the control of dissolved oxygen during a fermentation process is considered. A nonlinear control law inspired by the backstepping technique is proposed and the stability of the control scheme is proved. Two extensions of the algorithm are proposed to include a feed-forward action and to solve the problem induced by sampled oxygen(More)
The aim of this paper is to present new results on the Buck converter control. The behaviour of the buck converter is described by the well-known average model and the control strategy is based on a double integral high gain control law including an estimation of current load. This control scheme rejects efficiently the disturbances introduced by the(More)
Deoxygenation of concentrated solutions (0.33 gram per milliliter) of sickle cell hemoglobin show (i) a "crisis point" where the oxygen binding curve is unusually steep (Hill coefficient of 5 to 6), and (ii) a simultaneous increase in light scattering. Nearly identical oxygen binding curves are obtained upon oxygenation and deoxygenation of these solutions.(More)
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