Mihail (Mixi) Nedjalkov holds a Ph.D. degree in Physics and a Doctor of Science degree in Mathematics from the Bulgarian Academy of Sciences (BAS). He is a Senior Researcher with TU Wien, Austria and an Associated Professor with BAS. He published over 200 papers and one monograph. His research interests include solid-state physics, modeling of classical (Boltzmann) and quantum (Wigner) electron transport in micro- and nanostructures, collective phenomena, and theory and application of stochastic methods.Ivan Dimov is a Professor of Mathematical Modelling at the Institute of Information and Communication Technologies at the Bulgarian Academy of Sciences (BAS). His research interests include Monte Carlo methods, computational physics, parallel algorithms and GRIDs, and environmental mathematical modeling. He is author of more than 170 scientific papers, 4 monographs and 15 book editorships. He served as a Scientific Secretary with BAS and received the highest Bulgarian scientific award, the Marin Drinov medal on ribbon. Siegfried Selberherr is a Chair Professor at the TU Wien, Austria. With his research teams, he has published about 2000 manuscripts in journals, in books, and in proceedings, including 3 monographs and about 50 edited volumes. His research interests are modeling and simulation for nano- and microelectronics engineering. He has received numerous honors; he is a Fellow of the Institute of Electrical and Electronics Engineers, of the Academia Europaea, and of the European Academy of Science and Arts.