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선행 제왕절개술 후의 질식 분만의 성공 인자에 관한 연구
박종식 ( Park Jong Sig ),김기용 ( Kim Gi Yong ),나기훈 ( Na Gi Hun ),오관영 ( O Gwan Yeong ),박미혜 ( Park Mi Hye ),양윤석 ( Yang Yun Seog ),황인택 ( Hwang In Taeg ),박준숙 ( Park Jun Sug ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.11
목적 : 최근 반복 제왕절개술의 증가로 20년간 상승하고 있는 제왕절개율을 낮추기 위하여 선행 제왕절개 임부에서 자연분만을 시도하는 것에 관한 많은 연구가 보고되고 있다. 이에 본 연구에서는 제왕절개후 질식 분만을 원해 내원한 산모를 대상으로 성공군과 실패군으로 나누어 자연분만 시도의 안전성과 성공에 관여하는 인자를 제시하고자 하였다. 연구 방법 : 1997년 3월 1일부터 2002년 2월 28일까지 선행 제왕절개 산모 중 본원에서 질식 분만을 시도했었 Objective : Recently, with rising rates of repeat cesarean sections, enormous amount of the studies about trial of labor after cesarean section have been reported to decrease the rate of cesarean section. The purpose of this study is to provide data regar
Dielectric 마스크 적용 UV 레이저 프로젝션 가공을 이용한 빌드업 필름 내 선폭 10μm급 패턴 가공 연구
손현기,박종식,정수정,신동식,최지연,Sohn, Hyonkee,Park, Jong-Sig,Jeong, Su-Jeong,Shin, Dong-Sig,Choi, Jiyeon 한국레이저가공학회 2013 한국레이저가공학회지 Vol.16 No.3
To engrave high-density circuit-line patterns in IC substrates, we applied a projection ablation technique in which a dielectric ($ZrO_2/SiO_2$) mask, a DPSS UV laser instead of an excimer laser, a refractive beam shaping optics and a galvo scanner are used. The line/space dimension of line patterns of the dielectric mask is $10{\mu}m/10{\mu}m$. Using a ${\pi}$ -shaper and a square aperture, the Gaussian beam from the laser is shaped into a square flap-top beam; and a telecentric f-${\theta}$ lens focuses it to a $115{\mu}m{\times}105{\mu}m$ flat-top beam on the mask. The galvo scanner before the f-${\theta}$ lens moves the beam across the scan area of $40mm{\times}40mm$. An 1:1 projection lens was used. Experiments showed that the widths of the engraved patterns in a buildup film ranges from $8.1{\mu}m$ to $10.2{\mu}m$ and the depths from $8.8{\mu}m$ to $11.7{\mu}m$. Results indicates that it is required to increase the projection ratio to enhance profiles of the engraved patterns.
빌드업 필름의 선폭 6㎛급 패턴 가공을 위한 직접식 UV 레이저 프로젝션 애블레이션
손현기,박종식,정수정,신동식,최지연,Sohn, Hyonkee,Park, Jong-Sig,Jeong, Jeong-Su,Shin, Dong-Sig,Choi, Jiyeon 한국레이저가공학회 2014 한국레이저가공학회지 Vol.17 No.3
To directly engrave circuit-line patterns as wide as $6{\mu}m$ in a buildup film to be used as an IC substrate, we applied a projection ablation technique in which an 8 inch dielectric ($ZrO_2/SiO_2$) mask, a DPSS 355nm laser instead of an excimer laser, a ${\pi}$-shaper and a galvo scanner are used. With the ${\pi}$-shaper and a square aperture, the Gaussian beam from the laser is shaped into a square flap-top beam. The galvo scanner before the $f-{\theta}$ lens moves the flat-top beam ($115{\mu}m{\times}105{\mu}m$) across the 8 inch dielectric mask whose patterned area is $120mm{\times}120mm$. Based on the results of the previous research by the authors, the projection ratio was set at 3:1. Experiments showed that the average width and depth of the engraved patterns are $5.41{\mu}m$ and $7.30{\mu}m$, respectively.
동중국해 식물플랑크톤 군집의 공간분포와 와편모조류 적조
윤양호 ( Yun Yang Ho ),박종식 ( Park Jong Sig ),서호영 ( Seo Ho Yeong ),황두진 ( Hwang Du Jin ) 한국환경생물학회 2003 환경생물 : 환경생물학회지 Vol.21 No.2
N/A Abstract - We carried out a study on thermobaline structure and phytoplankton community in the East China Sea during early summer in 2002. As a result of marine environment and phytoplankton community, three characteristics of water type were identified. The former was characterized by the dominant species with diatoms, Chaetoceros lacinwus, Ch. decipiens, Guninardia flaeeida, PamZia sulcata, Pseudonitzschia pungens and Pseudosolenio calear-auis in Chinese coastal waters, the secondary was done by lower water temperature, salinity and the dominant species with dinoflagellates, Promcentrum donghaiense and Cemtium fusus, in over-a11 areas and the latter was done by the dominant species with coastal species of diatoms, Skeletonem costatum and Nitzschia longissima and eilicoflagellate, Dictyoeho speculum var. octopers in the transfer areas of Chinese continental coastal waters. Phytoplankton community in the surface layer identified a total of 66 species belonging to 36 genera Dominant species was Promcentrum donghieme, Chaetoceros lacinious, Skeletonem costaturn. Standing crops of phytoplankton in the surface layer fluctuated between 1.5 × 10^(4) cells L^(-1) ` and 3.5 × 10^(5) cells L^(-1). And the highest value appeared in the Cbangjiang estuaries with high dominance by diatoms and lowest one occurred in the southwestern area of Jeju Island with bigh dominance by dinoflagellates. Red tides with dinoflagellate, Prororcentrum donghaiense appeared in the frontal areas with maximum cell density, 3.4 x lo5 cells L-`. And outbreak environments was low water temperature under 20C, and low salinity under 31.55 psu. The vertical die tribution of red tide organisms went to about 3Om depth from surface.
Development of Innovative Prestressed Support Earth Retention System
김낙경(Kim Nag Gyeong),박종식(Park Jong Sig),한만엽(Han Man Yeob),김문영(Kim Mun Yeong),김성보(Kim Seong Bo) 한국지반공학회 2004 한국지반공학회논문집 Vol.20 No.2
A new innovative prestressed support (IPS) earth retention system has been developed and introduced. The IPS is a wale system prestressed by steel wires. The IPS consists of wale, wires, and H-beam support. The IPS provides a high flexural stiffness to resist the bending by earth pressures. The IPS earth retention system provides a larger spacing of support, economical benefit, construction easiness, good performance, and safety control. This paper explains basic principles and mechanism of new IPS system and presents a design method of IPS earth retention system. In order to investigate applicability and safety of new IPS system, field tests were performed in a trench excavation. The new IPS system applied in a trench excavation was performed successfully. The measured performances of IPS system were presented and discussed.
초기임신에 있어서 태아 심박동수의 변화 양상 및 임신예후의 예측 유용성에 관한 연구
김기용 ( Kim Gi Yong ),박종식 ( Park Jong Sig ),나기훈 ( Na Gi Hun ),박미혜 ( Park Mi Hye ),오관영 ( O Gwan Yeong ),양윤석 ( Yang Yun Seog ),황인택 ( Hwang In Taeg ),박준숙 ( Park Jun Sug ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.11
목적 : 본 연구는 초기 임신에 있어서 태아 심박동수의 변화 양상 및 태아 심박동수가 임신 예후를 예측하는데 유용한지를 분석하고자 하였다. 연구 방법 : 1999년 3월부터 2003년 1월까지 을지대학병원을 방문한 임신 38-69일 사이의 단태아 임신부 162명을 대상으로 하였다. 심박동이 없거나, 추적 관찰이 되지 않은 경우, 그리고 치료적 임신 중절을 한 경우는 제외시켰다. 심박동은 컬러 도플러를 이용하여 3회의 심박동의 평균값으로 정하였다. 결과 Objective : The purpose of this study was to define the normal variation of fetal heart rate (FHR) and to analyze whether first-trimester fetal heart rate (FHR) are useful in predicting pregnancy outcome. Methods : We prospectively studied 162 singleton p
INVAR 마스크 응용 반도체 기판 소재의 고체 UV 레이저 프로젝션 어블레이션
손현기(Hyonkee Sohn),최한섭(Hanseop Choe),박종식(Jong-Sig Park) 한국레이저가공학회 2012 한국레이저가공학회지 Vol.15 No.4
Due to the fact that the dimensions of circuit lines of IC substrates have been forecast to reduce rapidly, engraving the circuit line patterns with laser has emerged as a promising alternative. To engrave circuit line patterns in an IC substrate, we used a projection ablation technique in which a metal (INVAR) mask and a DPSS UV laser instead of an excimer laser are used. Results showed that the circuit line patterns engraved in the IC substrate have a width of about 15μm and a depth of 13μm. This indicates that the projection ablation with a metal mask and a DPSS UV laser could feasibly replace the semi-additive process (SAP).
나기훈 ( Na Gi Hun ),오관영 ( O Gwan Yeong ),김기용 ( Kim Gi Yong ),박종식 ( Park Jong Sig ),노정훈 ( No Jeong Hun ),양윤석 ( Yang Yun Seog ),황인택 ( Hwang In Taeg ),박준숙 ( Park Jun Sug ),박미혜 ( Park Mi Hye ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.10
Limb-body wall complex, also known short umbilical cord syndrome and body stalk anomaly, is a complex set of disruptive abnormalities consisting of failure of ventral body wall to close, short umbilical cord, disruption of lateral body wall, distinctive s