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설현선 한국무역경영학회 2020 한국무역경영연구 Vol.0 No.20
The Japan-Korea trade war, which started on July 1, 2019, was announced by the Ministry of Economy, Trade and Industry to limit the export of key materials for semiconductor and display manufacturing, and continues to continue in July 2020. Korean companies that saw this trade war as a major blow would rather take advantage of this opportunity to begin demonstrating the results of de-Japaneseization from Korea's most pressing semiconductor core materials in the field of export regulation since January 2020. In addition, in various fields that rely on Japan, the Korean government, large corporations, mid-sized companies, and small and medium-sized enterprises are unusually working together to accelerate de-Japaneseization. I am convinced that the period is still short, but I think it shows a distinctly different pattern from the past examples of failure in Japan. In fact, it is widespread that the semiconductor sector, which accounts for a large portion of the Korean economy, is heavily influenced by Japan, but it is known that it is very likely that this will happen for political reasons at any time, as in this case. De-Japaneseization is proceeding smoothly. The Korean government also considered it a good opportunity to implement various subsidies or support policies, and Korea has had considerable success in stabilizing the supply chain in the semiconductor sector, In this regard, we believe that the possibility of de-Japaneseization in other fields that gain confidence and depend on Japan is very high. 2019년 7월 1일 일본 경제 산업성이 반도체 및 디스플레이 제조 핵심 소재의 수출을 제한하기로 발표하면서 발발한 한일무역전쟁은 현재 2020년 7월에도 계속 되고 있다. 이번 무역전쟁으로 큰 타격을 입을 것이라고 보았던 대한민국의 기업들은 오히려 이번 기회를 발판 삼아서 2020년 1월부터 수출규제를 받고 있는 분야에서 한국에 가장 시급한 반도체 핵심소재부터 脫일본화 성과가 가시적으로 나타나기 시작했다. 또한 일본에 의존하고 있는 각종 분야에서 한국 정부, 대기업, 중견, 중소기업들이 이례적으로 힘을 합쳐 脫일본화에 박차를 가하고 있다. 아직은 기간이 짧아 확신하기 이르지만 脫일본에 실패했던 과거의 사례들과는 확실하게 다른 양상을 보이고 있다고 생각한다. 사실 한국경제에서 큰 비중을 차지하는 반도체 분야가 일본에 큰 영향을 받고 있다는 것은 만연한 사실이지만, 이번 사안에서와 같이 언제든지 정치적 이유로 이런 사태가 발생 할 가능성이 매우 높다는 게 알려지면서, 대기업을 기반으로 자발적으로 脫일본화를 순조롭게 진행하고 있다. 한국 정부에서도 좋은 기회로 여겨 각종 지원금이나 지원정책을 펼쳤고, 한국은 반도체 부분에서 공급망을 안정화시키는 데 상당한 성공을 거두었고, 이에 자신감을 얻고 일본에 의존하고 있는 다른 분야에서도 脫일본화를 진행할 가능성이 매우 높다고 판단된다.
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고현선,곽동욱,오수영,최세경,홍준석,황한성,박현수,설현주,김문영,김사진,박중신 대한산부인과학회 2022 Obstetrics & Gynecology Science Vol.65 No.2
ObjectiveTo evaluate the clinical significance of soft markers for aneuploidy screening in Korean women. MethodsWe retrospectively reviewed the medical records of 5,428 singleton pregnant women who underwent sonographyduring the second trimester at seven institutions in South Korea. We evaluated the prevalence of the following softmarkers: intracardiac echogenic focus, choroid plexus cysts, pyelectasis, echogenic bowel, and mild ventriculomegaly. We developed best-fitted regression equations for the fetal femur and humerus length using our data and defineda short femur and humerus as both long bones below the fifth centile. The results of genetic testing and postnataloutcomes were investigated in patients who had been diagnosed with aforementioned soft markers. ResultsThe median maternal age of our study population was 33 years, and the median gestational age at the time ofultrasonographic examination was 21 weeks. We detected soft markers in 10.0% (n=540) of fetuses: 9.3% (n=504)were isolated cases and 0.7% (n=36) of cases had two or more markers. We identified only two aneuploides (trisomy18, 46,XX,t[8;10][q22.1;p13]), of which one was clinically significant. We presented the neonatal outcomes of thefetuses with the respective soft markers. Preterm delivery, low birth weight, and small-for-gestational-age (SGA)were significantly more common in women with a shortened fetal femur (P<0.001, all). However, the presence of ashortened fetal humerus was not associated with those outcomes excluding SGA. ConclusionSoft markers in second-trimester ultrasonography have limited use in screening for fetal aneuploidy in Korean women. However, these markers can be used as a screening tool for adverse outcomes other than chromosomal abnormality.
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설재림,오정교,고현선,장현준 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.1
이젝터(Ejector)의 원리는 노즐에서 높은 유속을 갖고 분출하는 유체의 운동에너지에 의하여 저에너지 유체를 흡입하는 펌프의 일종이다. 이젝터는 생산현장의 열기관이나 유체기계발전소의 대류열전달 및 공기조화 덕트시스템에는 필연적으로 관로망이 연결되며 이들 관로망의 설계는 플렌트 전체의 효율뿐만 아니라 안정성과도 밀접한 관계를 갖고 있다. An ejector IS a fluid-transportation device, which spouts high-pressure fluid from driving pipes using kinetic energy of spouted fluid and raises pressure through exchange of momentum with surrounding gases of lower pressure. It can be manufactured with a simple structure irregardless of size of system, installed and used easily at places where fluid is flowing.
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이행남(Haeng-Nam Lee),박길문(Gil-Moon Park),나기대(Gi-Dea Na),손현철(Hyun-Chul Sohn),고현선(Hyun-Sun Go),박지만(Ji-Man Park),설재림(Jae-Lim Sul) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
This study analyses flowing characteristics of ejectors whose design expense is cheap and rarely need maintenance. Ejectors are appled for various industrial fields such as waste water treatment facilities, nuclear energy plants and boiler systems because of such advantages. This study analyses flowing of fluid absorbed because of low-pressure of driving pipes and expanded pipes. For this, diameter ratios of driving pipes and expanded pipes, and Reynolds number are changed and interpreted with CFD to identify flowing characteristics such as pressure and velocity distribution.
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