Dr. Vladivoj (Vlado Valkovic), born 1939, a retired professor of physics, is a fellow of the American Physical Society and the Institute of Physics (London). He has authored 24 books, from Trace Elements published by Taylor and Francis, Ltd., International Scientific Publishers in 1975 to Low Energy Particle Accelerator-Based Technologies and Their Applications published by CRC Press, Taylor and Francis Group in 2022. He is also author or coauthor 410 scientific and technical papers in international scientific journals in the research areas of nuclear physics, instrumentation application of nuclear techniques to problems in biology, medicine, environmental research and trace element analysis. Dr. Vlado Valkovic has also worked as a professor of physics, the head of laboratories, and as a scientific advisor for respected institutions around the world.