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Photochemical Reduction of 1,2-Diketones in the Presence of $TiO_2$
박준우,홍미정,고박광희,Park, Jun U,Hong, Mi Jeong,Go, Park Gwang Hui Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.11
1,2-Diketones, camphorquinone and 1-phenyl-1,2-propanedione, are converted to the corresponding $\alpha-hydroxyketones$ in moderate to good yields by TiO2-catalyzed photochemical reactions in deoxygenated alcoholic media. The reduction yield for 1-phenyl-1,2-propanedione is considerably increased by addition of water or triethylamine
하악 우각부 축소를 위한 골절제술의 체계적 고찰 및 증례 보고
박준우,최진영,김형욱,김종식,정인원,강진한,홍순민,Park, Jun-Woo,Choi, Jin-Young,Kim, Hyung-Wook,Kim, Jong-Sik,Choung, In-Won,Kang, Jin-Han,Hong, Soon-Min 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.4
In this systematic review on bone reduction procedures for the correction of the prominent mandibular angle, we collected and sorted the methods. The strength and weakness, indication, complication, and final esthetic result of each method were evaluated. After searching and filtering the literatures on the base of inclusion criteria, 9 eligible case series studies were included in this study. There were 3 types of curved ostectomies and 4 types of lateral cortical ostectomies. Surgical procedures for curved ostectomies were divided into 2 types. One was single curved ostectomy and the other was multistaged curved ostectomy. Lateral cortical ostectomies reported were all similar to sagittal split ramus osteotomy. The complications reported in the included studies were scarce, but curved ostectomies may be able to induce many complications. The prominent mandibular angle must be analyzed in the lateral dimension and frontal dimension, and curved ostectomy can reduce the mandibular angle laterally while lateral cortical ostectomy can reduce the bigonial distance frontally. Because curved ostectomies can induce complications and unnaturally large mandibular angle while can not reduce bigonial distance efficiently, the current trend for the angle reduction procedure is lateral cortical ostectomies.
기술 융합이 기업 성과에 미치는 영향: 항공기 기술을 사용한 자동차 기업을 중심으로
박준우,문성욱,Park, Junwoo,Moon, Seongwuk 기술경영경제학회 2017 Journal of Technology Innovation Vol.25 No.3
본 연구는 항공기 및 자동차 기술의 융합과 파급이 자동차 기업의 성과에 미친 영향을 분석한다. 구체적으로 본 연구는 항공기 관련 기술을 도입한 자동차 기업들의 재무성과 변화를 측정하여 분석한다. 이를 위해 본 연구는 자동차 기업들이 항공기 기술과 관련된 특허 변수들을 활용하는 정도와 방식을 측정하고, 이 변수들이 자동차 관련 기업들의 시장가치와 매출액에 미치는 영향을 분석한다. 분석 결과, 자동차 기업이 항공기 관련 기술을 활용할수록 시장가치가 상승하였다. 반면, 항공기 기술의 활용과 자동차 기업의 매출액 간에는 유의미한 관계가 발견되지 않았다. 이는 항공기 관련 기술의 보유 및 사용이 상품 시장에서 직접적인 매출액 증가 보다는 금융 시장을 통해 기업의 기술력에 대한 신호 기능을 수행하고 있음을 시사한다. We investigate the effect of technology convergence and spillover on firm performance. In doing so we specifically examine how automobile firms adapting aircraft technologies perform in stock market and product market. In order to use technology convergence and spillover, we investigate the patent citation relationship between aircraft and automobile related patents and construct the measures on automobile firms' adaptation of aircraft technologies. We also measure automobile firms' performance based on market value of firms in the stock market and revenues in product market. We find that the market value increases as automobile firms use the knowledge of aircraft technologies more. However, there is no relationship between the use of the aircraft technology and the revenue of automobile firms. This suggests that the use of advance aircraft technology plays a positive signaling role in financial market while it is not associated with generating revenues in product market.
미숙아망막병증에서 경공막 다이오드 레이저 광응고술의 5년간의 치료경험
박준우,조희준,조영욱,Joon Woo Park,Hee Joon Cho,Young Wook Cho 대한안과학회 2006 대한안과학회지 Vol.47 No.12
Purposes: We analysed the five-year outcomes and associated complications of transscleral diode laser photocoagulation (TSDLP), used to treat acute proliferative retinopathy of prematurity (ROP), to evaluate the efficacy and safety of this therapy. Methods: We performed a retrospective analysis of the records of 163 eyes of 82 infants with acute ROP, who were treated with TSDLP by a single surgeon. Follow-up periods ranged from 15 to 278 weeks. Results: The outcome was favorable in 158 eyes (96.9%) and unfavorable in 5 eyes (3.1%) of the 163 eyes that were treated. Vitreous hemorrhage was found to be an indicator of poor prognosis. Of the complications noted, symblepharon was observed in three eyes, hyphema was observed in four eyes, and a complicated cataract was observed in one eye. Conclusions: The results suggest that TSDLP is a safe and effective in the treatment of ROP. Vitreous hemorrhage should be regarded as a sign of poor prognosis.
박준우,Park, Jun-U (사)한국포장협회 2000 包裝界 Vol.83 No.-
본 고는 지난 달 14일 환경부와 자민련 주최로 열린 '포장폐기물 처리대책 개선방안공청회'에서 발표된 주제 중 하나로 업계의 폐기물재활용체계구축에 정보가 되기를 바란다.