Recent Researches in Geography, Geology, Energy, Environment and Biomedicine : the 4th WSEAS International Conference on Engineering Mechanics, Structures, Engineering Geology (EMESEG '11) : the 2nd International Conference on Geography and Geology 2011 (WORLD-GEO '11) : the 5th International Conference on Energy and Development - Environment - Biomedicine 2011 (EDEB '11), July 14-16, 2011