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We consider estimation of the inverse scatter matrix ??1 for a scale mixture Wishart matrices under various Efron–Morris type losses, tr[{?ˆ?1???1}2Sk] k=0,1,2..., where S is sample covariance matrix. improve on standard estimators aS+, S+ denotes Moore–Penrose and positive constant, through an unbiased estimator risk difference between new aS+. Thus we demonstrate that improvements over distri...

introduction: previous studies have shown that vitamin a and its derivatives such as retinoid and all-trans retinoic acid have a crucial role in memory, learning and synaptic plasticity. the receptors of vitamin a are seen in different parts of the brain such as hippocampus, where vitamin a has an important role in learning. in this study, the effect of intrahippocampal (ca1) injection of all –...

Submitted for the DFD11 Meeting of The American Physical Society Frequency structure of the nonlinear instability of a dragged viscous thread STEPHEN W. MORRIS, Dept. of Physics, University of Toronto, ROBERT L. WELCH, Dept. of Physics, McGill University, BILLY SZETO, Dept. of Physics, University of Toronto — A thread of viscous fluid falling onto a moving belt exhibits a spectacular variety of...