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단일황복면 구성모델을 이용한 정규압밀 점토지반의 비배수 거동해석
정진섭,이강일,박병기,Jeong, Jin Seob,Lee, Kang Ill,Park, Byung Kee 대한토목학회 1994 대한토목학회논문집 Vol.14 No.5
본 연구는 탄 소성이론에 기초를 둔 Lade의 단일항복면 구성모델을 이용하여 정규압밀 점토지반의 비배수 거동을 연구한 것이다. 시료는 영산강 하류에서 채취한 무안 점토를 재생성시켜 동방압축팽창시험과 압밀비배수 삼축압축시험을 하여 이 구성모델에 필요한 11개의 토질매개변수를 결정하였다. 또한 비배수거동해석을 위한 유한요소 프로그램을 개발하였으며, 프로그램의 정도를 검증하기 위하여 매개변수결정에 사용된 시험결과를 역해석하였다. 그리고 2차원 모형지반에 재하시험을 실시하고 결과를 유한요소 프로그램으로 수치해석하여 서로 비교 검토하였다. This study aims at investigating the undrained behavior of the normally consolidated clay foundation using single hardening constitutive model based on elasticity and plasticity theories. The specimen employed was sampled at Mooan near the down stream of Young San river and remolded into consolidation apparatus. 11 soil parameters for the model was determined from simple tests such as isotropic compression and consolidation undrained triaxial compression tests. FEM program to predict the undrained behavior of the foundation was developed and back analysis was performed to verify prediction ability of the FEM program. Finally plate load test on the 2-dimensional model foundation was carried out in order to compare numerical analysis and observed values on the foundation.
水晶體 β-Crystallin의 Carboxylmethylation에 關한 硏究
李康一,郭相太,林圭 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2
Changes of protein patterns of nonmethylated and endogenous or exogenous methylated β-crystallin fractions have been investigated, and then the methyl-acceptor proteins identified by urea /polyacrylamide gel electrophoresis. 1. Nonmethylated β_H and β_L-crystallin were separated in ten, eleven fractions, respectively. In the endogenous methylated β_H-crystallin, subfraction No. 10 was disappeared and No.3 was increased when compared with that of nonmethylated. In the β_L-cryallin, subfraction No.8, 10, 11 were decreased and No.6, 7 was increased. 2. When native β-crystallins were electrophoresed, subfraction No. 7, 9 disappeared and No.8b, 10b were newly appeared and. No. 6 was increased in methylated β_H-crystallin, and subfraction No. 11 was disappeared, No.9 was decreased and No.8 was increased in meth ylated β_L-crystallin. But, subfraction profile of methylted a-crystallin was not changed. 3. Methyl-acceptor proteins in each crystallin were subfraction No. 1, 6, 8 in a-crystallin, 2, 3, 6, l0a in β_H-crystallin and 1, 6, 7, 8, 10 in β_L-crystallin, respectively. These results suggest that the effect of carboxylmethylation on the aggregation of β-crystallin is related to not only the interaction of a, r-crystallin subfractions, but also the interaction of β-crystallin subfractions. On the other hand, a-crystallin is only related to the interaction of the other crystallin subfractions.
중·장년층에 있어서의 운동종목별 신체 운동효과에 관한 연구
이강일,심동원 순천향대학교 1990 논문집 Vol.13 No.1
This Treatise gains following results, Measuring the number of heart beats, blood pressure, the frequency of breathing, the tidal volume through the cardiopumonary function to the trained person with Long-term(Jogging group, Tennis group) & normal conrol group as an subject of study on the middle-and-matured-aged. Trained person group, namely, jogging & tennis group is furthered about 12% in cardiopulmonary function capacity. From among trained person(Jogging group & Tennis group), jogging group is exhibit higher traing effect than tennis group. 1. Heart beat & Blood Pressure At the time when they put in a rest from a training group, as for the number of neart beat, jogging group is an 70 per minute & tennis group is 72.1 per minute normal control group. 2. Frequency of Breathing & Tidal volume As the frequency of respiration, when the rest is put in from a training group, jogging group shows an average 14.0 per minute, tennis group shows an average 16.1 per minute, the value is lower by about 18%, 6% respectively than that of 15.7 per minute of normal control group on the contrary, in comparison with that of 494.9㎖ for control group when put in the value of 598㎖ more by about 21%, 17% respectively when in a training group.