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강민창 ( Kang Min Chang ),조혜진 ( Jo Hye Jin ),최상준 ( Choe Sang Jun ),한세준 ( Han Se Jun ),송창훈 ( Song Chang Hun ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.5
목적 : 조산아의 주산기 예후를 결정하는 위험요인을 분석하고, 각 요인별 예후를 비교분석함으로써 조산아 관리의 산과적 지표를 산출하고자 하였다. 연구 방법 : 2000년 1월 1일부터 2002년 12월 31일까지 조선대학교병원에서 분만후 신생아 집중치료실(NICU)에 입원한 37주 미만의 조산아와 신생아 집중치료실 (NICU)에 전원되어 입원치료한 조산아 236예를 대상으로 하였다. 조산아의 생존률, 이환율, 합병증, 장ㆍ단기 예후 등을 후향적으로 조사하였다. 결과 : 출생시 체중 및 재태연령은 주산기 예후를 결정하는 주요한 산과적 요인이다. 조산의 주산기 합병증을 보면 빌리루빈혈증이 27.5%로 가장 많았고, 호흡 곤란 증후군이 24.2%, 패혈증이 11.4% 등의 순이었다. 조산의 원인에 따른 생존률은 임신성고혈압 (88.2%)이 가장 높은 반면 자궁경부무력증 (50.0%)이 가장 낮은 생존률을 보임으로서 원인질환에 따른 생존률의 차이가 있으며, 자궁경무부력증의 경우 진단이 도면 대게 조산으로 귀결되므로 조산예방을 위한 조기진단과 치료가 필요하다. 결론 : 조산아의 생존률을 증가시키기 위해서 조기진통은 최소 제대연령 27주, 출생체중 1000 gm까지는 조절되어야 한다. Objective : To investigate the change of prognosis of the preterm infants delivered in Chosun University Hospital. Methods : A study was conducted for 236 newborns who were born at Chosun University hospital from January 1. 2000 to December 31, 2002. The data were collected by review of the hospital record. Results : 1) The survival rate of the preterm infants who weigh below 999 gm was 2% and 68.4% in 1,000-1,499 gm of infants 90.9% in 1,500-1,999 gm of infants and 92.7% in 2,000-2,499 gm of infants respectively. 2) The survival rate of the preterm infants who born 25% at 25-26 weeks, 50% at 27-28 weeks, 80% at 29-30 weeks, 88.2% at 31-32 weeks, 94.4% at 33-34 weeks and 95% after 35 wks respectively. 3) The cause of preterm delivery were premature rupture of membranes (41.7%), preterm labor (23.7%), pregnancy induced hypertension (10.9%), multiple pregnancy (8.3%) etc. 4) The perinatal complications of the preterm infants were hyperbilirubinemia (27.5%), respiratory distress syndrome (24.2%), sepsis (11.4%) etc. Conclusion : To increase the survival rates of preterm infants, the preterm labor should be controlled by 27 week`s gestation and the birth weight of 1,000 gm minimally.
SILS를 이용한 엔진 제어기 Driving Cycle 자동 주행 제어 기능 개발
강민균(Mingyun Kang),노영창(Youngchang Noh),임무창(Muchang Lim),임성빈(Sungbin Yim),이현규(Hyeonkyu Lee) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
This paper is the investigation on the effect of vehicle speed control to match driving trace automatically using application SW of ECU through simulation. For emission driving test, it needs numerous tests to get reliable result because of driver’s deviation even if driver is same person. In case of automatic control by application SW of ECU, it is easy and simple. Also it reduces time to get more effective result on complicated driving trace. To apply automatic control system, it designs PID system to control acceleration and deceleration by application SW and CAN communication. These methods are operated and confirmed by simulation of SILS. As a result of SILS, the virtual vehicle speed is matched entered WLTC driving cycle in ECU. And the vehicle speed deviation is satisfied with standard of permission.
황보경 ( Hwang Bo Kyung ),이후창 ( Lee Hoo Chang ),강민아 ( Kang Min Ah ),김태수 ( Kim Tae Soo ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
This study investigates structural behaviors such as ultimate strength and weld metal fracture mechanism of carbon steel (SS400) fillet-welded connections with shielded metal arc welding (SMAW) through monotonic tensile test. Specimens of TFW series (transverse fillet weld against loading direction) and LFW series (longitudinal fillet weld) failed by tensile fracture and shear fracture, respectively in the weld metal of connections. Test strengths of specimens were compared according to welding direction and weld length.