Ghenadii Korotcenkov，received his Ph.D. in Physics and Technology of Semiconductor Materials and Devices in 1976 and his Habilitate Degree （Dr. Sci.） in Physics and Mathematics of Semiconductors and Dielectrics in 1990. He was for many years the leader in the Gas Sensor Group at the Technical University of Moldova. He is currendy a research professor at Gwangju Institute of Science and Technology， in Gwangju， Republic of Korea. Dr. Korotcenkov is the author of five previous books and has authored over 180 peer-reviewed papers. His research has received numerous awards and honors， including the Award of the Supreme Council of Science and Advanced Technology of the Republic of Moldova.