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Policies for Sustainable Forestry in Belarus, Russia and Ukraine provides a thorough analysis of the key factors in the transition process affecting the forest sector in the eponymous countries. Moreover, it designs new strategies for sustainable development in these areas. The book attempts to strengthen selected trends in the forest sector in each country so that they may gradually achieve sustainability and create a market economy. The key factors are identified by making use of several different sources: scientific papers, interviews with experts from the three countries and the...

The phenomenon of photorefraction was discovered in 1966 in studies of propagation of a fairly powerful laser beam through the electro-optic crys- tals LiNb0, LiTa0, and some other compounds. The laser beam illumi- 3 3 nating part of the sample was found to cause a local change in the refrac- tive index of the crystal, thereby leading to distortion of the beam's wave front. The light had deteriorated the initially high optical quality of the crystal, in other words, it had given rise to a nonuniform distribution of the refractive index in the illuminated region. The effect was first called...