On December 18-20, 2019, a master class for teaching staff of the Department of Environmental Hygiene under the supervision of Professor Suk Won Kim is held in a joint Research center with TMA and Koryo University. During the master class, practical classes will be held on laboratory work and the use of tools and equipment available at the center. On December 18, classes will be held to study samples by testing them with a UV-1280 spectrophotometer.