7 research outputs found

    Le pilotage de la performance des administrations publiques Marocaines à l’ère du New Public Management

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    Le présent article vise à mettre la lumière sur la réforme de l’administration publique marocaine et sa relation avec le new public management d’une part, et le rôle que le contrôle de gestion peut jouer dans le pilotage de la performance des administrations publiques d’autre part. La finalité des réformes reste d’accroitre la performance dont la définition et les méthodes d’évaluation constituent un véritable souci, pour cela le contrôle de gestion se présente comme un meilleur outil de pilotage de la performance des administrations publiques qui peut y être instauré tout en prenons en considération leurs spécificités

    Synthesis, spectroscopic, and structural characterization of new functionalized gem-bisphosphonate complexes of tin(IV) chloride

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    The authors are grateful to the Tunisian Ministry of High Education and Scientific Research and Technology for financial support of this researchBisphosphonates of the types X(P(O)(OEt)2)2 (X = CH2=C (1a), CNCH2CH (1b) and PhCH2NCH2CH (1c)) react with SnCl4 in anhydrous dichloromethane to produce the new tin(IV) adducts [SnCl4(1a)] (2a), [SnCl4(1b)] (2b) and [SnCl4(1c)] (2c) in 72-80% yields. These complexes were characterized using IR, multinuclear (1H, 13C, 31P, 119Sn) NMR spectroscopy, elemental analysis, and in one case by single crystal X-ray diffraction. The NMR data show that the bisphosphonate ligands are coordinated to the tin center in a bidentate fashion forming cis octahedral tin complexes. Furthermore, the X-ray structure of complex 2b reveals that the bisphosphonate ligand is coordinated in a bidentate manner to the metal center in a distorted octahedral arrangement with Sn-O-P bond angles in the range 135.95(16)–137.99(18)°. The P=O and Sn-O bond lengths of 1.495(3)-1.497(3) and 2.134(3)-2.146(2) Å, respectively are in the order expected for phosphonate tin(IV) complexes. The results are discussed and compared with closely related analogues.PostprintPeer reviewe

    Fisher-KPP with time dependent diffusion is able to model cell-sheet activated and inhibited wound closure

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    International audienceThe popular 2D Fisher-KPP equation with constant parameters fails to predict activated or inhibited cell-sheet wound closure. Here, we consider the case where the collective diffusion coefficient is time dependent, with a 3-parameter sigmoid profile. The sigmoid is taken S-shaped for the activated assays, and Z-shaped for the inhibited ones. For two activated and two inhibited assays, our model is able to predict with a very good accuracy features of the wound closure like as the time evolution of the wound area and migration rate. The calibrated parameters are consistent with respect to different subsets of the experimental datasets used for the calibration. However, the assumption of sigmoid time profile for the proliferation rate yields calibrated parameters critically dependent on the dataset used for calibration

    Numerical Analysis for the Two-Dimensional Fisher-Kolmogorov-Petrovski-Piskunov Equation with Mixed Boundary Condition

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    International audienceIn this paper, a finite difference scheme is presented for the initial-boundary value problem for the two-dimensional nonlinear Fisher–Kolmogorov–Petrovski–Piskunov (Fisher–KPP) equation with mixed boundary conditions. Using Energy functional, stability of the suggested scheme is achieved. Unique solvability of the difference solutions is proved. Furthermore, the second-order convergence in the discrete H1-norm is established. Finally, two numerical experiments are reported to validate the theoretical analysis

    Improving the mechanical performances of a multilayered plate with the orientations of its layers of fibers

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    International audienceWe consider a symmetric composite multilayered plate whose fiber orientation variesfrom a layer to another. The plate model used is that of Mindlin. We are interested indetermining the optimal fiber orientations that optimize, in the same time, two criteria:minimizing the compliance and maximizing the smallest eigenfrequency of vibration orminimizing both of the compliance and the smallest eigenfrequency or maximizing bothof the smallest eigenfrequency and the smallest buckling load. In order to optimize one ofthe above criteria, a metaheuristic algorithm of Simulated Annealing type is used. While, inthe case of optimizing two objectives, the Pareto front method is used. Numerical resultsare presented for a rectangular eight-layered plate