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최시영,이동배,조영채 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2
This study was conducted to obtain the information on maternal and child health in Wonju-Gun, Kangwondo from March 1, 1990 to April 31, 1990. The Author surveyed a total 178 women experienced child born after 1987. The results were as follows: 1. The proportion of receiving prenatal care was 95.5%. The mean times of visiting medical facilities was 4.8 and the starting time of prenatal care was 3.3 months of gestational age. 2. The proportion of hospital or clinic delivery was 69.1 % but that of home delivery was 15.2% 3. The proportion of receiving postnatal care was 26.4% and the hospital or clinics was the most common place of visit. 4. The proportion of complete vaccination for child was 77.5% and the proportion of family who use contraception was 74.2%. 5. Variables such as education period, number of child and age at marrage had high relation with the variables of maternal and child health.
PVD에 따른 PEEK 소재의 기계적 특성 변화 및 열 영향에 관한 연구
최시영,정찬만,이호준,신태성,임상진 한국기계기술학회 2020 한국기계기술학회지 Vol.22 No.2
EMI(Electro Magnetic Interference) is a very important factor to consider in electronic equipment. For EMI coating, it is applied to the sputtering electronic equipment housing made by PEEK. The question arises that there may be physical changes in the PEEK material due to heat generated during sputtering. During sputtering inside the chamber, the degree of temperature due to the heat was measured indirectly, and characteristics such as bending capacity, tensile strength, impact strength, flexural strength were measured to understand physical changes. Tensile strength and the flexural strength increased by 14.5 to 18 compared to the base group. And the impact strength of the un-notched specimens was increased. Overall, there has been no change in the physical properties of PEEK due to heat generated during sputtering deposition.
우관상동맥 이상기시를 동반한 급성 심근경색 환자에서의 관상동맥우회술
최시영,김용환,서종희 대한흉부외과학회 2008 Journal of Chest Surgery Vol.41 No.5
An abnormal origin of the right coronary artery can be responsible for sudden death, myocardial ischemia, arrhythmia and syncope, and it may be associated with the accelerated development of atherosclerotic disease. The mechanisms of ischemia in the case of an abnormal origin of the right coronary artery are currently unclear and several surgical methods have been proposed to treat this malady. Multidetector Computed Tomography shows the course of the abnormal coronary artery, it helps to clarify the mechanism of the ischemia and it aids in choosing the best surgical approach. We report here on a case of acute myocardial infarction with an abnormal origin of the right coronary artery. Coronary artery bypass grafting was subsequently carried out to treat this patient.
임신성 영양모세포성 종양의 MR 소견:Gadolinium 조영증강의 유용성
최시영,변재영,김범수,윤영현,문경미,박경신,김병기,배석년,신경섭 대한영상의학회 1997 대한영상의학회지 Vol.37 No.6
Purpose:To investigate the role of gadolinium enhanced MR imaging in the evaluation of gestational trophoblastic tumors(invasive mole and choriocarcinoma). Materials and Methods:Pre-enhanced T1-and T2-weighted images and gadolinium enhanced T1-weighted images of 34 gestational trophoblastic tumors (15 choriocarcinoma, 19 invasive moles) were retrospectively evaluated ad enhancement paterns were analyzed. Morphologic differences and structural characteristics were analyzed by the evaluation of tumor margin, patterns of heorrhagic necroses, the development of intratumoral vascularity, and molar villi. Graded scores of MR findings between pre- and gadolinium enhanced images were based on the following criteria:1) visualization of tumor margin;2) distinction between tumor necrosis and zone of trophoblastic proliferation;and 3) molar villi. Statistical differences between graded scores of pre-and post-enhanced images were analyzed. Results:A choriocarcinoma was a well-defined mass with peripheral rim enhancement and central hemorrhagic necrosis, while an invasive mole was a ill-defined mass with partial necrosis, tiny cystic areas and increased intratumoral vascularity with dense reticular enhancement. Interface between tumor necrosis and the zone of trophoblastic proliferation was better visualized on gadolinium enhanced images than on pre-enhanced images. Only in invasive moles were tumormargin and intratumoral molar villi clearly discrimated on gadolinium-enhanced images. There was no statistical difference in the visualization of tumor margin of choriocarcinoma between pre-and post-enhanced images. Conclusion:Gadolinium enhanced MR imaging was helpful for the visualization of tumor characteristics in gestational trophoblastic tumors and in differential diagnosis between invasive mole and choriocarcinoma.
최시영,최석철 한국국방경영분석학회 2004 한국국방경영분석학회지 Vol.30 No.1
Integrated Logistic Support (ILS) is a management and technical process whereby all the diverse elements needed to fully operate, maintain, and totally support a materiel system in the field are identified, developed, and deployed simultaneously and on an equal priority with the item of materiel being supported. The test and evaluation (T&E)of ILS act the important role of reduction of life-cycle cost and keeping of good performance for weapon system. In this article, we suggest the alternatives for improvement in the test and evaluation of ILS during weapon system acquisition. It is hoped that this research is valuable and beneficial to persons related weapon system acquisition, in order to maximize the efficiency of defense acquisition management by reducing the life-cycle cost and enhancing the quality of weapon system.