We have designed and constructed a box-type solar cooker with multi-step inner reflectors. The inner reflectors were arranged in a three-step fashion to create different angles with respect to the horizontal. A transient mathematical model is presented for the cooker. It is based on an...

In the text we describe how human capital is created by the individual investments of persons iein themselvesl, and how this process can be assisted or not by the macro-economic policy of the state especially the interest rate policy. We indicate how the production and accumulation of human...