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Uranium has both radioactive and chemical hazards and risk assessments must address both types. Its environmental distribution depends on natural occurrence and has been influenced by human activities such as energy production, coal, and phosphate fertiliser exploration, which may impact freshwater ecosystems. In this book, the authors present current research in the study of the characteristics, occurrence and human exposure to uranium. Topics include the anthropogenic sources of uranium in Serbia; uranium mining in Portugal; laser-induced nuclear decays in uranium isotopes; uranium...

In connection with the emergence of new effective methods of surface condition diagnostics before and after implantation at the present stage of metal implantology the most important task is to improve the quality of biocompatible implant and prosthetic surfaces preparation, on which their performance characteristics and, in particular, the development of pathological manifestations largely depend. The purpose of the monograph is to acquaint the readers with some recent works performed by the foreign and Ukrainian authors in the field of diagnostics of physical-chemical state of the dental...

Symmetries play a fundamental role in physics. Non-Abelian gauge symmetries are the symmetries behind theories for massless spin-1 particles, while the reparametrization symmetry is behind Einstein's gravity theory for massless spin-2 particles. In supersymmetric theories these particles can be connected also to massless fermionic particles. Does Nature stop at spin-2 or can there also be massless higher spin theories. In the past strong indications have been given that such theories do not exist. However, in recent times ways to evade those constraints have been found and higher spin gauge...