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RISS 인기검색어
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- 저자 : 조성두(Sung-Doo Cho) (검색결과 2 건)
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조성두,남기용,Cho, Sung-Doo,Nam, Kee-Yong 대한생리학회 1967 대한생리학회지 Vol.1 No.1
Cold $(0^{\circ}C)$ or warm $(25^{\circ}C)$ fresh and sea water were flooded into the lungs of rabbits through tracheal canule. Respiratory arrest ensued in 19.5 minutes in the warm fresh water flooded rabbits and was the longest survival time among the experimental groups. The survival times in the other groups were: 2.32 minutes in cold fresh water group, 2.75 minutes in .warm sea water group, and 4.57 minutes in cold sea water group. Cardiac output was measured by means of T-1824 dilution technique after 2 or 3 minutes of flooding in 27 rabbits. Blood pressure was observed by mercury manometer throughout the survival time in 40 rabbits. The following results were obtained. 1. Cardiac output in the warm fresh water flooded and sea water flooded animal was smaller than that of control rabbits. In the cold fresh water flooded animal cardiac output was greater than that of the control animal. 2. Time constants of T-1824 dilution curve of experimental group were elongated than the normal curve. 3. Central blood volume showed an increase in the fresh water group, a decrease in cold sea water group and no change in warm sea water group. 4. In all of the experimental groups arterial blood Pressure showed an abrupt and great variations after flooding of lungs and lasted about 30 seconds. Thereafter, arterial pressure remained at a plateau level until the sudden fall to zero and this was almost coincided with the time of respiratory arrest. The Plateau level of arterial Pressure in fresh water group was about 10 mmHg higher than the control value, and it was lower than the control value in warm sea water group. In cold sea water group the plateau was made up by fluctuations around the control value. 5. Osmosis of water through the lung alveolar membrane occured in all animals. Fresh water caused hemodilution and sea water caused hemoconcentration. 6. In sea water flooded animal more volume of water was recovered through the tracheal canule than the volume injected into trachea. This was interpreted as the consequence of the shift of water from plasma to alveolar sac. 7. Relative freight of lung was greater in fresh water group than sea water group. In all animal lung edema ensued. 8. The mechanisms of cardiac output variations were discussed.
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능동제어 콘크리트궤도 복원공법(ACBR) 적용현장 계측결과분석
민경주(Kyung-Ju Min),이정술(Jung-Sool Lee),조성두(Sung-Doo Cho),홍상민(Sang-Min Hong) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
능동제어 콘크리트궤도 복원공법(ACBR)을 적용하여 침하된 선로를 복원시킨 기존선 및 고속철도 복원구간에서 궤도의 균열, 충전상태를 확인하고, 콘크리트궤도의 가속도 및 침하계측을 수행하였다. 노반의 충전상태는 콘크리트궤도의 인상복원 시공 중에 HSB 측면의 하단 윗부분에 설치한 충전 확인공을 통하여 충전재 유출 여부로 즉시 확인하였으며, 복원 후 콘크리트궤도에서 코어를 채취하여 점검하였다. 가속도 측정은 실제 침하상태와 복원상태에서 의미있는 변화가 없었으므로 콘크리트도상 진동이 큰 곳에서 측정 분석하였다. 복원된 선로의 침하계측은 대부분 복원초기 일정기간 경과 후일부 복원개소를 제외하고는 유효한 침하가 발생되지 않았다. 일부 침하가 진행 중인개소도 있으며, 이에 대해서는 원인분석 및 향후 추가 측정을 통하여 고찰할 것이다. After settled rail systems have been up-lifted, the rail crack and concrete filling have been checked and the acceleration and settlement of the rail system have been measured. The filling condition, during construction, has been checked by filling material leaking through the holes that are located at the bottom of HSB. The similar check has been performed by core test after lift-ups have been completed. Acceleration has been checked at the locations where the vibration is governs because it was expected that there shall not be major changes before and after the lift-ups. Significant settlements have not be observed for most locations after reasonable time has been passed after lift-ups. However, settlements have been observed at some limited locations and the reasons will be reviewed in the proceeding studies.
ScienceON
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