Photoaddition Reactions of Alkynes to Quinonoid Compounds

김성식,김애란,조인호,심상철,Kim Sung Sik,Kim Ae Rhan,Cho In Ho,Shim Sang Chul Korean Chemical Society 1989 Bulletin of the Korean Chemical Society Vol.10 No.1

UV irradiation of anthraquinone and diphenylacetylene in benzene gave 1:1 photoadduct (7) and cyclization product (8). The photoreaction of anthrone and diphenylacetylene in dichloromethane afforded the photooxidation products (7, 8, and 9) in air. The photoproduct (7) underwent the cyclization reaction during the purification by the column chromatography (silica gel). When irradiated with 350 nm UV light, the product (11) of benzil reacted with diphenylacetylene to give a photoadduct(12).

선천성 식도 폐쇄증에 대한 임상적 고찰

김성식,임시연,정풍만,Kim, Sung-Sik,Rhim, Si-Youn,Jung, Poong-Man 대한소아외과학회 2008 소아외과 Vol.14 No.1

From 1979 to 2006, fifty eight patients with esophageal atresia were treated by one pediatric surgeon at Hanyang University Hospital. We analyzed the clinical findings and outcome of these 58 patients. There were 30 males and 28 females. Their mean birth weight was $2,960{\pm}400g$ (1,170~4,020 g). The most common type of anomaly was Gross type C (49 patients; 84.5 %). There was no type B. Fifty-two patients underwent definitive surgery. Postoperative complications were as follows: anastomotic leakage in 17 patients (32.7 %), anastomotic site stricture in 15 (28.8 %), gastroesophageal reflux in 10 (19.2 %) and recurrent TEF in 1 (1.9 %). A total of 152 associated anomalies were detected from 48 patients (82.2 %). The cardiovascular system was the most commonly affected (30 patients with 46 anomalies). The VACTERL association was present in 14 patients (24.1 %). Operative mortality was 17.3 % including self-discharge patients after operation.

고속 Embedded Processor에서 EMI 최소화 회로

김성식,정의석,조경록,Kim, Sung-Sik,Cheong, Eui-Seok,Cho, Kyoung-Rok 대한전자공학회 1999 電子工學會論文誌, C Vol.c36 No.1

휴대용 통신장비를 비롯한 각종 전자기기는 고집적화 및 소형화 되고 있으며, 이러한 전자기기는 무수히 많은 원하지 않은 전자파를 발생시키고 있다. 이에 따라 EMI 영향을 최소화 하기 위한 연구가 요구되며, 본 연구에서는 전자기기를 구성하는 각 회로들의 반도체 설계 단계에서의 EMI발생 원인을 분석하여 병렬 버퍼의 출력 구동회로와 decoupling 커페시터를 이용하여 EMI를 최소화하는 회로를 제안한다. 이를 i8052에 적용하여 칩을 제작하고 측정한 결과 delta 전류는 1/3으로 감소하였고 EMI는 10dBuV 이상 개선된 결과를 얻었다. All kinds of electronic machinery including portable communication system are being smaller size and are used at high frequency. It generates a lot of unwanted noise signals called electromagnetic interface (EMI). This paper presents an analysis result of EMI generation in VLSI and propose new circuits to minimize of EMI using I/O driver with parallel buffer architecture and distributed decoupling capacitor in a chip. The proposed circuits are evaluated with i8052 MCU which is shown reducing of delta current 1/3 times and improvement of EMI more 10dBuV compared with conventional processors.

부산지역 근로자들의 고혈압에 관한 조사

김성식,Kim, Sung-Sik 대한예방의학회 1979 Journal of Preventive Medicine and Public Health Vol.12 No.1

부산지역 산업장에서 근무하고 있는 근로자 32,786명을 조사대상으로 하여 환경요인이 고혈압에 미치는 영향을 구명할 목적으로 동년 10월까지 고혈압의 유병율을 조사하였다. 제조업에 근무하고 있는 근로자는 전 조사대상자의 72.4%였으며 연령별로는 20-29세군이 39.9%로 가장 많았으며 이들의 성별 분포는 남녀 모두 20-29세 군에서 가각 36.8%, 46.1%로 가장 근로자가 많은 연령층이였다. 고혈압증의 유병율은 15.9였고 가장 유병율이 높은 업종은 도 소매 및 음식, 숙박업으로 51.5였다. 이 유병율은 연령이 많아 질수록 높아지는 경향이 있었다. A survey was performed from April 1975 to Oct. 1978, on the high blood pressure of workers employed at industries in Busan area in order to seek for the environmental factors on blood pressure. The number of workers surveyed in the manufacturing industries occupied 72.4 percent of the total. By the age group of all workers, 39.9 percent belonged to the 20-29 year group. For the age distribution and sex of the workers, the highest frequency was found in the 20-29 year group in both sexes and was 36.8% and 46.1% in male and female, respectively. The prevalence rate of hypertension among the workers was 15.9. The industries showing the highest prevalence rate equivalent to wholesale, retail trades, restaurants, and hotels. This survey presented a tendency of increasing prevalence rate as the age increases.

Photoaddition Reactions of p-Quinones to Conjugated Diyne

김성식,유동열,김애란,조인호,심상철,Kim Sung Sik,Yoo Dong Yeol,Kim Ae Rhan,Cho In Ho,Shim Sang Chul Korean Chemical Society 1989 Bulletin of the Korean Chemical Society Vol.10 No.1

Irradiation of solutions of p-quinones and conjugated diyne, 1,4-diphenylbutadiyne, with 350 nm UV light gave the photoproducts such as quinomethane in good yields (70-85%).

그라프를 이용한 치태조절이 동기유발에 미치는 영향에 관한 연구

김성식,신형식,Kim, Sung-Sik,Sim, Hyoung-Shik 대한치주과학회 1989 Journal of Periodontal & Implant Science Vol.19 No.1

Lipo-PGE₁의 투여경로가 흰쥐의 횡복직근피판의 생존률에 미치는 효과

김성식,변준희,유결,한기택,Kim, Sung-Sik,Byeon, Jun-Hee,Yoo, Gyeol,Han, Ki-Taik 대한성형외과학회 2005 Archives of Plastic Surgery Vol.32 No.1

The Transverse rectus abdominis musculocutaneous (TRAM) flap has been commonly used for autologous breast reconstruction. Despite these clinical usefulness, the TRAM flap is prone to partial flap or fat necrosis in especially pedicled flap. To improve flap survival, the surgical delay procedures and pharmacological treatments have been developed. In many studies for the pharmacological treatment, Lipo-$PGE_1$ has demonstrated a marked ability to improve flap survival and it's effect has been proved similar to surgical delay procedure. The purpose of this study is to determine the most effective route of Lipo-$PGE_1$ administration as a pharmacological treatment in TRAM flap of the rat. Fifty male Sprague-Dawley rats weighing 300-350 gm were divided into five groups, One week before flap elevation, Lipo-$PGE_1$($2{\mu}g/kg$) was injected three times in a week and than the left inferior epigastric vessel based TRAM flap ($5.0{\times}3.0cm$) elevated; group I: no procedure before flap elevation; group II: intraperitoneal injection; group III: intravenous injection; group IV: subcutaneous injection; group V: topical application. A flap was assessed at postoperative 7 days by comparison of flap survival rate, vessel counts(H-E stain), and vascular endothelial growth factor(VEGF) protein expressed by Western blot. The results demonstrated that the mean percentages of the flap survival area in group III were significantly higher than that of any other group(p<0.05). The vessel counts of all experimental groups were statistically higher than that of control group(p<0.05). Only in group III, the VEGF protein expression was increased significantly than control group and there are no difference in other experimental groups. In conclusion, the intravenous administration of the Lipo-$PGE_1$ is the most effective on flap survival, and the VEGF induced by Lipo-$PGE_1$ has some positive effects on new vessel formation and flap survival.

중소기업의 사회적 책임 추진현황과 과제

김성식 ( Sung-sik Kim ),이영면 ( Young-myon Lee ) 한국중소기업학회 2017 中小企業硏究 Vol.39 No.2

이 연구는 우리나라 중소기업의 사회적 책임(이하 CSR) 추진현황을 전반적으로 검토하여, 중소기업이 사회적 책임을 추진하는 이유와 추진상의 문제점을 살펴보고, 중소기업 사회적 책임의 바람직한 발전방향과 중소기업을 둘러싼 이해관계자의 중소기업 CSR 지원방안을 제안하고자 한다. 현재 CSR은 주로 대기업이 수행하고 있어, 중소기업이 CSR을 수행해야 한다는 입장은 다소 부담으로 작용할 수 있으며, 그렇게 보는 견해가 대부분이다. 그러나 글로벌 환경변화에 따라 글로벌 표준이 확대되고 환경규제가 다양화되면서, 이젠 중소기업도 CSR를 하지 않으면 생존할 수 없는 시대가 되었다. 지금은 CSR이 선택이 아니라 필수가 된 것이다. 이러한 상황에서 중소기업이 CSR을 도입해야 하는 다양한 이유를 찾아보고, 현재 중소기업의 CSR 추진현황을 살펴 보았다. 그리고 중소기업 CSR 실태를 종합적으로 평가하고, 중소기업 CSR 추진상의 문제점을 정리하였다. 마지막으로 중소기업 CSR 확산을 위해 중소기업 자체적인 개선방안, 정부차원의 지원방안, 대·중소기업 상생협력방안, 공공기관 및 지방자치단체의 지원방안을 통해 우리나라 중소기업의 바람직한 CSR 방향 및 과제를 제안하였다. This study examined the overall social responsibility (CSR) Status of Korea`s SMEs. Through this, we want to establish CSR of the SME support measures. Also, we find reasons to promote CSR despite the limitations of small enterprises. Currently, CSR mainly has been done by large companies, this is the position that SMEs need to do is CSR`s most views can act as a burden. However, SMEs were also the times cannot survive unless the CSR as the global standard expanded and diversified in accordance with environmental regulations. Now that is a must, not a choice. In this point of view, we look for a variety of reasons to implement CSR of SMEs, then examine the current situation of SMEs` CSR promotion. We also assess the overall situation of CSR of SMEs and summarize the problems of promoting CSR of SMEs. Furthermore, we propose to the preferred direction of the challenges Korea`s SMEs through government support measures, large and small business win-win cooperation, the role of public authorities and local governments and SMEs` own improvement plan.

수정된 직교 신경망을 이용한 비선형 시스템의 제어

金成植(Sung-Sik Kim),李永錫(Young-Seog Lee),徐輔爀(Bo-Hyeok Seo) 대한전기학회 1998 전기학회논문지 Vol.47 No.6

전류밀도에 따른 매입형 영구자석 동기전동기 사이즈 및 성능 분석

김성식(Sung-Sik Kim),서채원(Chae Won Seo),정상용(Sang-Yong Jung) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.11

본 논문은 동일한 운전점에서 전류밀도에 따른 매입형 영구자석 동기전동기 (Interior Permanent Magnet Synchronous Motor, IPMSM)의 효율을 비교 · 분석하였다. 동일 운전점에서 전류밀도 변화에 따른 적층과 자석 및 코일 사용량을 변경하며 전자계 성능을 비교하였고, 유한요소 해석을 통해 검토하였다. 해석 결과를 바탕으로 설계 제한사항과 기타 성능을 함께 고려하며 설계 방향을 제시하였다.