칼륨施用水準과 生育段階 및 草種에 따른 秋草의 生育과 칼륨 및 마그네슘함량의 差異를 알아보기 위해 두가지의 水총#我培實驗을 실시했다. 먼저 生育段階의 진행에 따른 收草의 收量 및 無機物含量의 變化를 未本科救草 3種類를 사용하여, 목초가 발아한 후 15日 부터 55日 까지 조사했는데 그 結果는 (1) 發穿後 25 日 경 목초의 生草收量 및 칼슐含 量이 빠르게 增加했으며 (2) 이탈리안 라이그라스에서 칼륨含量이 가장 높고 마그네슘含量이 낮았으며, 툴 페스큐

The current load combination criteria for design of nuclear power plant structures(NPP) are not based on the probability • based design concept but rely on the conventional design concept. ln this paper. a load combination criteria for design of NPP containment structures are proposed based on a FEM - based random vibration analysis. More accurate reliability analyses under various dynamic loads such as earthquake loads were made possible by incorporating the FEM and random vibration theory‘ which is different from the conventional reliability analysis method. ln this paper‘ the load factors for the design of NPP structures in Korea are pro∞sed by considering appropriate load combination criteria for design

H.J. Andrews Expt. Forest의 토양절지동물의 분포상을 조사한 결과 Coleoptera가 14과 41종으로 우점군임이 밝혀졌으며, 토양응애는 6과 7종의 분포가 확인되었으며 Typhlodromus, Gymnodamaeus, Phauloppia 및 Scleroribates 등은 계절변동 없이 발생하고 있음이 알려져 구북구계의 발생생태와 차이가 있었다. 기타 곤충군의 발생은 Collembola 4과 16종, Psocoptera 4과 4종, 식균성 총채벌레 3과 16종, Hemiptera 1과 1종, Diptera 3과 6종, Hymenoptera 1과 10종이었다. 산림토양의 절지동물은 산림생산단계의 1차 분해자로 중요한 역할을 수행하며, 부식절이 풍부한 토양조건은 무식생구에 비하여 종다양성은 낮으나 안전도가 높게 나타나 재생산의 주요인자로 해석된다.

Current estimates, based on the same star-count analysis, of the distance to the globule Bamard 361 range from 300 pc to 650 pc. All the problems associated with the estimates have been fully rectified in this study, and a modification has been made to the classical Wolf diagram to improve the accuracy in the distance determination. A reference field was carefully selected close to the globule but well outside the globule boundary, and star counts for this field were performed on the blue POSS plate in order to set up the reference magnitude sequence appropriate to the general area of B 361. From the reference sequence, the stellar density function has been derived specifically for the direction toward the globule. Correction was made for the general interstellar extinction, and the luminosity function with the Wielen's dip was adopted. The resulting density function clearly reveals the existence of the local Cygnus-Orion arm in the direction of B 361 at about 700 pc away from the Sun. Analysis of the star-count data for the program field locates the globule at distance 600 ± 50 pc ; thus, the globule is an object located in the Cygnus-Orion arm, residing somewhat toward its leading edge.