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노형철(Hyung Chul Roh),정명수(Myeong Soo Jung),정순승(Soon Seung Jung),이광호(Kwang Ho Lee) 한국사회체육학회 2000 한국사회체육학회지 Vol.13 No.-
Camping activities were thought as one of educational methods. This study analyzed effects of participation in camping activities on high school students` humanity development variables, which affect humanity development were used for this study and data were collected at high schools in Kwang-ju city. At this site 600 surveys were distributed to a random sample of 300 participant and 30 non participant in camping activities. The results were as follows. 1. Participation in camping activities more positively affected humanity developments of male students` than that of female students`. 2. There was significant relationship between camping activities and sociality, leadership, activity and responsibility development. 3. There is no relationship between frequency of participation in camping activities and humanity development. Since the data were collected only at high schools in Kwang-ju city, further studies on high schools in countrysides would be required.
백서 부분적 설절제가 하악골 성장에 미치는 영향에 관한 실험적 연구
현석환,김광원 대한치과교정학회 1995 대한치과교정학회지 Vol.25 No.5
이 연구의 목적은 부분적 설절제가 백서 하악골의 성장에 미치는 영향을 규명하기 위함이다. 생후 4주령의 웅서백서를 두 집단으로 분류하였다. 첫번째 집단은 대조군으로 사용하고 두번째 집단은 부분적으로 설절제를 시행한 집단이다. 이 실험동물은 부분적인 설절제 후 4주와 8주에 희생되었다. 부분적인 설절제 후 쥐의 하악성장변화는 건조 골표본에 의해 관찰되었다. 이 연구로부터 얻어진 결과는 다음과 같다. 1. 성장기 백서의 설절제는 하악골 자체의 형태에는 영향을 미치지 못하였으나 전반적인 하악골 성장의 감소를 초래했다. 2. 하악골 성장에 영향을 미치는 여러가지 요인 중 설은 백서 하악골 성장에 필수적인 요소이다. 3. 부분적인 설의 절제는 백서의 전체적인 성장을 변화시키지는 않았다. The purpose of this study was to investigate the effect of the partial glossectomy on the mandibular growth of growing rats. Thirty one Sprague-Dawley rats four weeks old were divided into two groupes : the first group served as the control and the second group was partially excised in the tongue of the rats. The experimental animals were sacrificed at 4 and 8 weeks after partial glossectomy. The changes of the rat mandibular growth following partial glossectomy were observed biometrically from dry bone specimens. The findings were as follows : 1. Partial glossectomy of growing rat produced inhibitory effects on the growth of the mandible and did not change the original shape of the mandible. 2. Among the factors affecting mandibular growth, the presence of the proper tongue size was essential. 3. Partial glossectomy of the growing rats could not change general growth of the rats whole bodies.
아동의 우식활성과 모친의 우식활성간의 상관성에 관한 연구
형광업,이광희 大韓小兒齒科學會 1991 大韓小兒齒科學會誌 Vol.18 No.2
The correlation of caries activity of 51 children with that of their mothods has been studied. The age distribution of children was from 3 to 13 years and the mean was 8.2 years. Caries activity was measured by caries experience, Cariostat test, and modified Alban test. Tooth brushing frequency, breast-fed period, and bottle-fed period were also investigated. Among the caries activity variables, there were significant correlations between Cariostat test score of children and that of mothers, between Cariostat test score of children and DT mothers, between DT of children and modified Alban test score mothers, and between DT of children and DT of mothers, Also there were significant correlations between toothbrushing frequency of children and that of mothers and between ft of children and bottlefed period. Caries activity of children had reverse correlation with age of mothers. These observations indicate that caries activity of mothers should be controlled first to control that of children.
辛炯泰,韓泳根,李光淳 成均館大學校 1982 論文集 Vol.31 No.-
A factorial experiment (6x5) involving 6 kinds of crop residues (barley straw, corn stover, rice straw, rye straw, soybean straw, wheat straw), 5 levels of sodium hydroxide (0,3,6,9,12%) was conducted with four Korean native male goats using a practical dairy cattle ration. Crop residues digestion was measured in situ with nylon bags containing test material in the rumen of the fistulated goats. Bags of 9×15㎠ made of 100-mesh nylon cloth were filled with one of ground crop residues to give 3-5g dry matter. These bags were put into the ventral sac of the rumen and taken out at the end of 72 hours. They were washed in cold water, dried at 105℃ for 8 hours and weighed. The straw dry matter remaining was calculated by difference and analyzed for organic matter. The results which were obtained with this experiment were as follows: 1. The nylon bag dry matter digestibility (NBDMD, %) and nylon bag organic matter digestibility (MBOMD, %) of NaOH-treated crop residues were highly significant different (P<0.01) in different levels of NaOH and kinds of crop residues. 2. The relationship between cell-wall constituents (Y, %) of crop residues and level of NaOH (X, %) was: Y=-1.63X+77.06 (r=0.99^**) 3. The optimum level of NaOH for improving NBDMD (%) from crop residues, on the basis of Shin et al (1981), was 0% NaOH for soybean straw, 3% NaOH for barley straw and wheat straw, 6% NaOH for corn stover and rice straw, and 12% NaOH for rye straw.
충격하중을 받은 CFRP적층판의 피로굽힘강도에 관한 연구
임광희,양인영,김기형 조선대학교 동력자원연구소 1995 動力資源硏究所誌 Vol.17 No.2
The purpose of present paper is to estimate the static and fatigue bending strengths of CFRP (carbon fiber reinforced plastic) laminates having impact damage (FOD). The specimens which had different stacking composition, EPOXY and PEEK matrix, and orthotropic and quasi-isotropic laminated plates, were prepared for this experiment. A steel ball launched by the air gun collides against CFRP laminates to generate impact damages, and the 3-point fatigue bending test is carried out by using the impacted laminates to investigate the influence of stacking composition on the effect on the fatigue strength of CFRP laminates.