According to sampling theories of attitude formation, evaluative learning depends on the sampling in the environment. We investigated teachers’ student evaluations in a simulated school class. Two experiments were designed to test distinct implications of experience-sampling models. While the...

Based on the classical biological Monod model a so called double-limited self-purification model working in an aggregate water resource is constructed. From this model we derive a stationary selfpurification function and three conditions for ecological sustainable development. Copyright Kluwer...