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A low power consumption control scheme:application to a piezostack-based active mount

Frontiers of Mechanical Engineering 2013年第4期8卷 383-389页

作者： t.loukil O.BAREILLE M.N.ICHCHOU M.HADDAR LtDS Ecolc Centrale de Lyon36 Avenue Guy de Collongue U2MP Ecole Nationale d'lngenieurs de Sfax

Piezostack-based active mounts have shown great efficiency for vibration control in a wide frequency *** this paper,we investigate the performances of the global semi-active control strategy presented by Ichchou et al.[1]for a control system consisting of an active mount and a supported *** control strategy allows extracting vibrations energy of the supported mass,storing it in accumulators to be reused for powering in part the actuators(two piezostacks).Consequently,energy needs are reduced versus good control performances comparable to those of the active control based on the negative velocity *** performances of the controller are evaluated in both frequency(transmitted force)and time(acceleration)domains which show that vibrations of the supported mass due to base excitations are efficiently attenuated with the proposed *** energetic analysis confirms the reduced energy requirement compared to the active scheme.

关键词： hybrid mount energy control piezoelectric harvesting

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Cyclin A2:At the crossroads of cell cycle and cell invasion

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World Journal of Biological Chemistry 2015年第4期6卷 346-350页

作者： Abdelhalim loukil Caroline t Cheung Nawal Bendris Bénédicte Lemmers Marion Peter Jean Marie Blanchard Institut de Génétique Moléculaire de Montpellier CNRS Université Montpellier Department of Developmental and Cell Biology University of California Irvine Department of Cell Biology UT Southwestern Medical Center

Cyclin A2 is an essential regulator of the cell division cycle through the activation of kinases that participate to the regulation of S phase as well as the mitotic entry. However,whereas its degradation by the proteasome in mid mitosis was thought to be essential for mitosis to proceed,recent observations show that a small fraction of cyclin A2 persists beyond metaphase and is degraded by autophagy. Its implication in the control of cytoskeletal dynamics and cell movement has unveiled its role in the modulation of Rho A activity. Since this GtPase is involved in both cell rounding early in mitosis and later,in the formation of the cleavage furrow,this suggests that cyclin A2 is a novel actor in cytokinesis. taken together,these data point to this cyclin as a potential mediator of cell-niche interactions whose dysregulation could be taken as a hallmark of metastasis.

关键词： Cyclin Mitosis Mesenchymal transition Metastasis A

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