Introduction : L’hépatocarcinome est une maladie tumorale grave et lourde, se greffant très souvent sur une cirrhose hépatique. L’amélioration de son pronostic exige d’abords la collecte d’un maximum d’informations à tous les stades de son évolution. Patients et méthodes : 63 cas d’hépato carcinome (CHC), ont été enregistrés entre juillet 2014 et février 2017. Une étude descriptive a été réalisée pour déterminer les caractéristiques de cette maladie dans notre région. Résultats : Tous les cas se sont développés sur un foie cirrhotique, d’origine virale. La tranche d’âge 60-70 ans est la plus touchée avec 23patients. La sex-ratio était de 1,17 en faveur des hommes. Deux régions se distinguent avec respectivement 24 et 14 % des cas. 81 % des patients étaient des stades localisés, 47 patients avaient des comorbidités, 38 avaient des stades Child A. Le diagnostic reposait sur les critères BCLC, 29 Patients étaient PS «0 », 21 PS «1». Le volume moyen était de 57,3 mm (28 mm - 137 mm). Les segments IV et V occupent la première place avec 7 nodules chacun. 37 patients replissant les critères requis pour la greffe hépatique étaient en attente, 27 parmi eux ont reçu une radiothérapie 3D focalisée. Les résultats sont très encourageants en matière de tolérance, de contrôle local et de survie avec en plus un impact positif sur la prolongation de la durée d’éligibilité pour la greffe hépatique. Conclusion : Une meilleure connaissance des aspects épidémiologiques et cliniques des CHC associée à une prise en charge précoce en passant par le dépistage va indiscutablement améliorer le pronostic jusque-là médiocre de ces tumeurs.

Reliable data transport is an essential requirement for many multimedia applications in wireless sensor networks. Actually, an efficient transport protocol for these applications must take into account not only reliability and energy consumption factors but also memory occupancy and data delivery delay. Recently, many research works have been conducted in this area, however the proposed protocols treat some of these aspects and neglect others. Contrarily, in this paper we present a novel transport solution designed to provide 100% reliability without making light of other factors. Through different mechanisms, we attempt to reach this objective with congestion avoidance and good performances in terms of energy consumption, delivery delay, and memory storage. The proposed protocol, called congestion avoidance with reliable transmission and energy efficiency (CARTEE), attains these goals through several mechanisms, namely: fixed sliding window transmission, alternative implicit/explicit acknowledgement, a new congestion detection technique, and distributed transmission rate adjustment. To evaluate the proposed protocol, we have conducted simulations using ns-3. The obtained results confirm the efficiency and scalability of CARTEE and demonstrate that it outperforms the recent proposed transport protocols in terms of reliability, congestion avoidance, data cache occupancy, and latency.

In this note, we present several characterizations for some distinguished classes of bounded Hilbert space operators (self-adjoint operators, normal operators, unitary operators, and isometry operators) in terms of operator inequalities.

The Equilibrium Voltage Step (EVS) technique has been used for extraction of depth and energy concentration profile of traps situated in the oxide of a lightly stressed metal-oxide-semiconductor (MOS) structure. This has been achieved up to the very near Si-SiO2 interface. The results are discussed and compared with those obtained using charge pumping (CP) technique. A good agreement is achieved between the trap densities extracted using the two methods even though differences in the shape of the profiles can be observed. The results also very well agree with those published previously using current deep level transient spectroscopy (C-DLTS).

In this paper, a robust active fault tolerant control (AFTC) scheme is proposed for induction motor drives (IMD) via input-output linearization control (IOLC) and nonlinear observer. In order to estimate the states and to reconstruct the faults, two different observers are used; a Luenberger observer (LO) and an extended kalman filter (EKF). Further we introduce feedback linearization strategy by choosing the output function as the rotor speed and flux square. To provide a direct comparison between these FTCs schemes, the performance is evaluated using the control of IMD under failures, variable speed, and variable parameters, finally the obtained results show that the proposed controller with the proposed observers provides a good trajectory tracking, and these schemes are robust with respect to faults, parameter variations, and external load disturbances for induction motor drive system.