Autor: Janet TY Leung

With the conclusion of adolescence, a child develops into a teenager that may experiment with dating, smoking and drinking, and they may make important decisions without parental knowledge or guidanc …

Using the experience from the United States on positive youth development, researchers in Hong Kong developed the Project P.A.T.H.S., trained the potential program implementers and evaluated the deve …

The object of this book is to introduce the subject of ejector in refrigerating plants in view of energy savings. A first part concerns the use of an ejector in a heat-operated system for the product …

The imminent exhaustion of fossil energy resources and the increasing demand for energy were the motives to put into practice an energy policy based on rational use of energy, and on exploitation of …