References of "Zhang, Z"
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See detailEstablishment of stable human fibroblast cell lines constitutively expressing active Rho-GTPases.
Servotte, S.; Zhang, Z.; Lambert, Charles ULg et al

in Protoplasma (2006), 229(2-4), 215-20

Small GTP-binding proteins of the Rho family (RhoA, Cdc42, Rac1) regulate the organisation and the turnover of the cell's cytoskeleton and adhesion structures. A significant function of these cellular ... [more ▼]

Small GTP-binding proteins of the Rho family (RhoA, Cdc42, Rac1) regulate the organisation and the turnover of the cell's cytoskeleton and adhesion structures. A significant function of these cellular structures is to translate and counterbalance forces applied to, or generated by, cells in order to maintain homeostasis and control cell movement. We therefore hypothesised that Rho-GTPases are directly involved in cellular gravity perception and may participate in the alterations induced in microgravity. To define an adequate cellular model allowing to investigate this issue, we have established stable cell lines constitutively expressing active forms of either RhoA, Cdc42, or Rac1. The three cell lines differ by morphology and by their ability to form filopodia, lamellipodia, and bundles of actin stress fibers. Overexpression of the active form of either RhoA, Cdc42, or Rac1 is compatible with cell viability and does not affect cell population doubling time. Thus, our series of mutant cells appear well suited to gain further knowledge on the molecular mechanisms of cellular gravity perception. [less ▲]

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See detailRole of the RhoGTPases in the cellular receptivity and reactivity to mechanical signals including microgravity
Nusgens, Betty ULg; Chometon, G.; Guignandon, Alain et al

in Journal of Gravitational Physiology : A Journal of the International Society for Gravitational Physiology (2005), 12(1), 269-270

The small G proteins of the Rho Family (RhoGTPases) are key operators in the signaling arising from extracellular matrix through integrin receptors and from membrane receptors for soluble ligands. FLight ... [more ▼]

The small G proteins of the Rho Family (RhoGTPases) are key operators in the signaling arising from extracellular matrix through integrin receptors and from membrane receptors for soluble ligands. FLight data show that microgravity affects cell architecture and gene expression leading us to assume that the signaling pathways(s) involving the RhoGTPAses might disturbed in a weightlessness environment. TO test this hypothesis in microgravityu, we created genetically engineered human fibroblasts that will be used in Biolab on the ISS. [less ▲]

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See detailA generic approach for image classification based on decision tree ensembles and local sub-windows
Marée, Raphaël ULg; Geurts, Pierre ULg; Piater, Justus ULg et al

in Proceedings of the 6th Asian Conference on Computer Vision (2004)

A novel and generic approach for image classification is presented. The method operates directly on pixel values and does not require feature extraction. It combines a simple local sub-window extraction ... [more ▼]

A novel and generic approach for image classification is presented. The method operates directly on pixel values and does not require feature extraction. It combines a simple local sub-window extraction technique with induction of ensembles of extremely randomized decision trees. We report results on four well known and publicly available datasets corresponding to representative applications of image classification problems: handwritten digits (MNIST), faces (ORL), 3D objects (COIL-100), and textures (OUTEX). A comparison with studies from the computer vision literature shows that our method is competitive with the state of the art, an interesting result considering its generality and conceptual simplicity. Further experiments are carried out on the COIL-100 dataset to evaluate the robustness of the learned models to rotation, scaling, or occlusion of test images. These preliminary results are very encouraging [less ▲]

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See detailGestion de la mobilité et de la multimodalité - Transport ferroviaire
Charlier, J.; Delepiere Dramais, Ch.; Marchal, Jean ULg et al

Report (2001)

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See detailGestion de la mobilité et de la multimodalité - Transport aérien : gestion environnementale des aéroports
Charlier, J.; Delepiere-Dramais, Ch.; Marchal, Jean ULg et al

Report (2001)

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See detailLa gestion environnementale des aéroports
Charlier, J.; Delepiere, Ch.; Marchal, Jean ULg et al

Report (2000)

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See detailTransport ferroviaire à grande vitesse - Les passagers
Gathon, Henry-Jean ULg; Thiry, Bernard ULg; Charlier, J. et al

Report (2000)

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See detailLes aéroports wallons
Thiry, Bernard ULg; Charlier, J.; Delepiere, Ch. et al

Report (2000)

Detailed reference viewed: 33 (6 ULg)