Preparation and Corrosion Behavior of Rare Earth Oxide Chemical Conversion Membrane for AZ31 Magnesium Alloy by Ultrasonic Assisted Process

KNIT Aiming at improving the corrosion resistance of AZ31 magnesium alloy in 3.5% (mass fraction) NaCl solution, the effects of CeO2 concentration and ultrasonic and non - ultrasonic assisted processes on chemical conversion film of AZ31 magnesium alloy prepared in the mixed bath of 0.300 mol/L Na2MoO4+0.120 mol/L NaF +0.050 mol/L Na3PO4+0.0

read more

Wilsonian ward identities

Abstract For conformal field theories, it is shown how the Ward identity corresponding to dilatation invariance arises in a Wilsonian setting.In so doing, several points which are opaque in textbook treatments are clarified.Exploiting the fact that the Exact Renormalization Group furnishes a representation of Proteolytic Enzyme Formulas the conform

read more

Formation of concept of decimal system in Mexican school children

The present study deals with initial formation of concept of decimal system in second year of education at primary school in Mexico (City of Puebla).Our research is based on Activity Theory conception of teaching-learning process and of gradual introduction of scientific concepts in school age.The method has been designed and worked out with the he

read more