The article presents the results of the World Bank Project Monitoring Key Skills in Graduates of Basic Professional Training Programs. The purpose of the project was to develop and test techniques for estimating these skills. The article briefly describes the basic concepts used in this...

A mixture of light and heavy atoms is considered. We study the kinetics of the light atoms, scattered by the heavy ones, the latter undergoing slow diffusive motion. In three-dimensional space we claim the existence of a crossover region (in energy), which separates the states of the light atoms...