Magazine voor aluMni van de universiteit van aMsterdaM
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Reducing Inter-Laboratory Differences between Semen Analyses Using Z Score and Regression Transformations
Background Standardization of the semen analysis may improve reproducibility. We assessed variability between laboratories in semen analyses and evaluated whether a transformation using Z scores and regression statistics was able to reduce this variability. MaterialsAndMethods We performed a retrospective cohort study. We calculated between-laboratory coefficients of variation (CVB) for sperm c...
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This article gives counterexamples for some conjectures about risk orders. One is that in risky situations, diversification is always beneficial. A counterexample is provided by the Cauchy distribution, for which the sample means have the same distribution as the sample elements, meaning that insuring half the sum of two iid risks of this type is precisely equivalent to insuring one of them ful...
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Using Discrete Gradient Methods (Quispel & Turner, J. Phys. A29 (1996) L341-L349) we construct integration methods that solve ordinary differential equations numerically while preserving all their first integrals (i.e. constants of the motion) exactly. 1 Department of Mathematics, La Trobe University, Bundoora, Melbourne, 3083, Australia. 2 E-mail: [email protected] 3 Instituut voor Theo...
متن کاملTobacco Plants Overproducing Fe-Superoxide Dismutase in Chloroplasts’
Laboratorium voor Genetika, Department of Genetics, Flanders lnteruniversity lnstitute for Biotechnology, Universiteit Gent, K.L. Ledeganckstraat 35, 8-9000 Gent, Belgium (W.V.C., M.V.M., D.I.); Laboratoire Associé de I’lnstitut National de Ia Recherche Agronomique, France (D.I.); and Laboratorium voor Biofysica, Faculteit Wetenschappen, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, B...
متن کاملCyclin-dependent kinases and cell division in plants- the nexus
Vladimir Mironov, a,b Lieven De Veylder, a Marc Van Montagu, a and Dirk Inzé a,b,c,1 a Laboratorium voor Genetica, Departement Plantenggenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, K.L. Ledeganckstraat 35, B-9000 Gent, Belgium b CropDesign N.V., Technologiepark 3, B-9052 Zwijnaarde, Belgium c Laboratoire Associé de l’Institut National de la Recherche Agron...
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