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윤수한(S.H.Yoon),이중순(J.S.Lee),김현지(H.J.Kim),박춘근(C.G.Park),하종률(J.Y.Ha) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
This research is about lean burn which can be satisfied with the limitation of both exhaust gas and fuel consumption. But as the mixing ratio is lean, combustion state becomes unstable, the ignitability becomes bad, and the mean effective pressure decrease. To solve the problems is one of the most important things. The aim of this study is to extend the lean limit and to make rapid combustion for the stable combustion, the improvement of fuel consumption ratio and the decrease of hamful gas. <br/> It is possible to extend the lean inflammability limit in the IDI engine. We can greatly<br/> improve the ignitability in the lean field by providing the sub-chamber with methanol.<br/> This study shows that we can design and produce the sub-chamber type constant volume combustion chamber. We can use methanol as the fuel to be injected into the chamber with the high pressure of 8∼20MPa.<br/> Like this, we define the combustion process, extend the lean inflammability limit therefore we can give you some useful materials for the developments and improvment of lean burn engine.<br/>
솔레노이드를 사용한 정압 연료분사 장치의 제어에 관한 연구
윤수한(S.H.Yoon),김현지(H.J.Kim),배종용(J.Y.Bae),하종률(J.Y. Ha) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
For the practical use of a fuel injection system using solenoid, some mechanical and electrical problems should be explicitly analyzed. In our study, we have investigated these problems experimentally and have improved such that a solenoid driving circuit is liable to establish a fast response and a precise control of injection quantity. This developed device is capable to control equivalance ratio from low level to high level. Therefore, we are expected that this developed device should be applicable to an actual engine.<br/>
성인 뇌실 확장증에서 SHUNT 수술 적응을 결정하기 위한 Continuous ICP Monitoring의 적용
윤수한,조경기,안영민,안영환 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.12
We evaluated one month follow-up results of the 12 adult patients who showed ventriculomegaly in the aspects of symptoms. Evans ratio, periventricular low density grades of radio-isotope cisternography and grades of continuous intracranial pressure monitoring that were classified on the pressure wave and basal pressure level. The grades of continuous ICP monitoring were compared to the grades of radio-isotope cisternography. History symptoms CT findings and radio-isotope cisternography are often helpful to decide shunt operation but sometimes continuous intracranial pressure monitoring gives invaluable information.
윤수지,추현정,김세은,권희연,이한나 대한중환자의학회 2017 Acute and Critical Care Vol.32 No.1
Reinforced endotracheal tubes (ETTs) are designed to resist kinking or compression. However, these have a potential risk of being obstructed or severed by a patient’s bite. We report a case in which a reinforced ETT was severed by tube-bite while the patient was in the prone position during an intensive care unit stay. Bronchoscopic evaluation showed that the severed distal part of the tube had lodged in the patient’s right main bronchus, and it had to be surgically removed. The patency of reinforced ETTs should be carefully monitored in patients intubated in the prone position.