The purpose of this study was to provide a practical guide to the use of various stretchers that rescue workers use by analyzing muscle fatigue degree associated with lifting a patient. The experiment was conducted with working male and female rescue crews. Having mixed groups of gender complete tasks such as lifting, moving, and unloading a patient using four different types of stretcher, we recorded each muscle fatigue degree in the shoulder and lower back regions of each subject. The data showed, in terms of muscle activity, differences within each group of genders and its combinations were significant in certain muscle groups depending on the types of stretcher used and body sizes of each subject, and, when it comes to Elerctor Spenae, the female subjects used more muscular strength than the males did. In regards to the muscle fatigue degree, there was no significant difference found within each group of the genders, body sizes, and their combinations. However, in the case of applying different models of stretcher, there were significantly differences in the fatigue degree.

Dasan (茶山) Jung, Yak-Yong (丁若鏞, 1762-1836) who compiled the Practical Thought in the latter period of Chosun dynasty had asserted the acceptance of foreign advanced culture for the people's utilization and welfare. He, in Giyeron, asserted that Chosun should introduce the hi-tech culture of Chung dynasty for people's utilization and welfare including all the technical skill and new institutional systems. And he asserted that we should learn the merits of Japan, as it were (1) the strengthening of the national defence (2) the excellent shipbuilding technology (3) the lattice window of the official residences. Dasan criticized that Shin, Yu-Han (申維翰) who had dropped in Japan as a communication man hadn't surveyed on “the elaborateness of their industry and various training exercises" in Valhaesagyunmunrok (跋海槎見聞錄). He, in prefaces for declaration, asserted that the import of diverse hi-tech industry is the second obligation of the ambassador. Dasan who had classified the ambassador into two kinds as like (1) the style of Yi, Ki-Yang (李基讓) had contributed to the people's welfare by introducing their thrashing fan machine for raw cotton <prefaces for declaration>, (2) the style of Shin, Wi (申緯) had purchased oddly shaped stones for individual taste <Jaejaesukdo (題載石圖)> judged the latter more highly. He won the highest praise on Yi, Ki-Yang that his achievement could be stood beside Moon, Yik-Jum (文益漸) who had contributed a lot to the people's welfare by importing the cottonseed first. Dasan's assertion for the acceptance of foreign advanced culture had aimed just to the people's easy utilization and welfare had been derived from his realism and practicalism.

Influences of different seeding dates on growth, seed yield, fatty acid composition and oil content were investigated in flax plants for two years. The results indicated that plant height in early seeding date was higher than that of delayed seeding dates during first season. Furthermore, seeding date also significantly affected the ripened seed rate and the rate increased with the delay in seeding date in first season. Seed yield in the first crop season was significantly higher than the second crop season. Palmitic acid showed variation in different seeding dates. Contrarily, stearic acid was stable and did not changed by different seeding dates. Linolenic acid was found in highest amount in all seeding dates consecutively in two cropping years. Highest oil content was recovered from the seeds of flax sown at 29 Apr. and May 9 in first and second cropping year respectively.