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.

지속가능성 멤버십과 주가 : KOSPI 200 ESG 지수변경 실증분석

박준우 ( Joon-woo Park ),서은화 ( Eun-Hwa Seo ) 한국생산성학회 2021 生産性論集 Vol.35 No.3

ESG activities, which have a significant impact on an firm’s sustainability and corporate value, have received much attention from domestic and foreign investors. Due to their importance, a relationship between ESG activities and corporate value has become an interesting research topic. In this study, the focus of sustainability is on inclusion and exclusion of constituents in the KOSPI 200 ESG Index. In other words, existing studies involving changes in existing indices have focused primarily on indices representing the country's stock market, but this study focuses on ESG indices, which are highly relevant to sustainability in testing the hypotheses of existing studies. The results of this study are as follows. First, information incorporated into the ESG index is accepted as a positive signal in the short term, and information excluded is recognized negatively. Therefore, in the short term, it was confirmed that the incorporated companies were much higher than the excluded companies in the CAR. Second, both added and excluded companies saw their stock prices fall after the index change date. In other words, the price pressure hypothesis was supported. Third, the short-term rise in share prices is accompanied by a relatively high excess volume compared to the trading volume in the overall market, and it is also accompanied by a relatively high rate of change in volume relative to other periods. So, the short-term rise in stock prices, the rise in stock prices caused by increasing liquidity, can be interpreted as supporting the liquidity hypothesis. Fourth, to test the investor awareness hypothesis, this study compares the shadow costs of incorporated and excluded shares with the number of shareholders. Results for incorporated shares show that shadow costs are reduced and that the number of shareholders increases. So, these results are consistent with the investor awareness hypothesis that the event of index additions causes investors to raise their share prices by reducing shadow costs. Fifth, in a regression analysis to investigate the relationship with variables affecting CAR caused by information on the inclusion of the ESG index, the excess volume and the rate of change in volume, respectively, have a positive(+) effect on the CAR for the shares incorporated. This can be seen as an additional support for the liquidity hypothesis. In conclusion, information on the inclusion of the KOSPI 200 ESG index has had a positive impact on investors, along with an increase in transaction volume within the event period, leading to a rise in stock prices, but the increase is minimal. This can be interpreted as not being very meaningful information for investors, as opposed to financial performance, such as productivity and profitability. The differentiation of this study is that information on the inclusion and exclusion of the KOSPI 200 ESG Index is used to test index change effects. This study has a limitation of measuring index change effects as a short-term stock price response, and this study plans to conduct further studies on the long-term performance of stock prices and their relevance to financial performance, such as productivity and profitability.

천식 급성 악화 시 기관지 구조 및 폐 기능 변화에 대한 QCT 기반 평가

박준우(Joon Woo Park),김수정(Sujeong Kim),임재광(Jae-Kwang Lim),진광남(Kwang Nam Jin),양민석(Min Suk Yang),채금주(Kum Ju Chae),진공용(Gong Yong Jin),김태범(Tae-Bum Kim),김희규(Hee-Kyoo Kim),이창현(Chang Hyun Lee),최상헌(Sanghun Choi) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

한국 하회마을과 일본 시라카와마을의 관광특성

박준우(Park, Joon-woo),윤병섭(Yoon, Byung-seop) 한국문화관광학회 2002 문화관광연구 Vol.4 No.1

This is a case study on the tourism characteristics of the traditional villages. We compares with the traditional villages of Hahoe and Sirakawa. As a result, we should find the way to vitalize that and those are follow. First, we should support to the tourism promotion and development. Second, we should encourage inhabitants' to use of the traditional villages. Third, We should make a plan by consultation and participation of local resident. This drawing must be based on inhabitants' agreement rather than have coerciveness. And We are unfold to coincide in development purpose. Fourth, We are try the village to world cultural heritage of UNESCO. By next time, it is participation side of local resident. First, local community become to the tourism production. Second, voluntary participation of local resident are required. Though tourists can experience and understand of culture heritage, sightseeing interchange based on trust between tourists can be available and drive revisit with inhabitants.

MSCI 코리아지수 변경과 주식시장의 반응

박준우(Joon Woo Park) 대한경영학회 2016 大韓經營學會誌 Vol.29 No.3

해외 M&A 이후 인수기업의 장기성과에 관한 연구

박준우(Park, Joon Woo),이재춘(Lee, Jae Choon) 대한경영학회 2006 大韓經營學會誌 Vol.19 No.5

Carboxymethylchitosan 의 특성화 및 금속 결합 성질

박준우(Joon Woo Park),박동미(Dong Mee Park),고광희(Kwang Hee Koh) 한국고분자학회 1986 폴리머 Vol.10 No.6

분자동역학을 이용한 흑연 위에서의 2종 합금 나노입자의 확산 거동 연구

박준우 ( Joon Woo Park ),이주성 ( Ju Seong Lee ),민찬호 ( Chan Ho Min ),이현석 ( Hyun Seok Lee ),류지훈 ( Ji Hoon Ryu ),서동화 ( Dong Hwa Seo ),이혁모 ( Hyuck Mo Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.8

We study the diffusion of Ag based bimetallic nanoclusters supported on graphite. Using a molecular dynamics simulation, we reveal that the Ag clusters show rapid diffusion because of their hexagonal bottom layer. In order to decrease the rate of diffusion, we added Pt and Ni to distort the structure of the alloy cluster (i.e., the alloying method). We expected Pt to provide a stronger force on Ag atoms, and Ni to shorten the bond length and thereby change the structure of Ag cluster. However, the attempt was unsuccessful, because Pt and Ni atoms formed cores inside the Ag clusters. We therefore designed a collision system where large Ag clusters collide with small Pt or Ni clusters. Upon collision with Pt clusters, the diffusion showed little change, because Pt atoms are substituted at the Ag atomic site and form a perfectly ordered structure. The collision with Ni, however, deforms the bottom layer as well as the overall cluster structure and decreases diffusion. This outcome appoints toward the possibility of further application to the manufacture of durable nanocatalysts.

사용성 향상을 위한 Parallax Scroll One Page 웹 디자인에 관한 연구

박준우(Joon Woo Park),김병택(Byung Taek Kim) 한국디자인문화학회 2014 한국디자인문화학회지 Vol.20 No.4

현대 사회의 다양한 채널의 미디어를 활용한 정보커뮤니케이션은 스마트 미디어의 발전으로 인하여 이루어지게 되었다. 다양한 디바이스를 통한 정보 커뮤니케이션은 사용자들의 정보 전달 환경을 유기적이며, 광의적으로 발전시켰다. 이에 따라 반응형 웹과 같은새로운 형태의 웹 콘텐츠 서비스가 사용자의 욕구를 충족시켜 주고 있다. 이와 함께 웹 트렌드의 지속적인 변화는 단일페이지 웹인 Parallax Scroll One Page와 같은 새로운 형태의 웹 디자인을 가능하게 하였으며,이는 향후 웹 트렌드의 중요한 요소가 될 것이다. 이에 본 연구에서는 현재 상용화된 Parallax Scroll OnePage가 웹을 사용하는 사람들의 사용성을 높일 수 있는 디자인 방법인가를 검증하고자 Parallax Scroll One Page의 특성을 One Page IA / Scrolling Control /Parallax Animation으로 도출하였으며, 사용성 평가 요소로서 정보적 이해성 / 활용적 편의성 / 표현적 흥미성 / 매체적 적합성에 미치는 영향도를 분석하였다. 분석 방법은 통계적 분석방법을 활용하여 자료분석은SPSS 21.0을 활용하였고, 통계처리방법은 빈도분석, 기술통계분석, 상관관계분석, 회귀분석을 사용하여 결과를 도출하였다. 분석 결과 Parallax Scroll One Page웹 디자인 요소들은 사용성 평가 요소에 모두 유의미하다는 결과를 도출하였으며, 특히 편의성은 모든 요소의 영향도가 높았고 흥미성은 Parallax Animation이, 활용성은 One Page IA, Scrolling Control 요소의 영향도가 높게 나타났다. 향후 Parallax Scroll One Page가 웹 사용자들의 사용성을 높일 수 있는 디자인 방법으로 기대된다. Data communication using variously channeled media of the contemporary society has come with the development of smart media. Data communication through various devices has developed the environment for users to deliver data organically and broadly. Therefore, new types of web contents services such as responsive web are satisfying the needs of users. Likewise, the continued change of web trends has enabled a new type of web design such as single-page web called Parallax Scroll One Page and this will become an important element of the future web trend. Based on this understanding, the study derived the characteristics of Parallax Scroll One Page as One Page IA / Scrolling Control / Parallax Animation with an aim to verify if the currently commercialized Parallax Scroll One Page is a design method to increase web users’ usability. As elements subject to analysis of usability, the study analyzed the levels of impacts on data understandability, convenience in use, expressive interest and medium suitability. The methods were statistical, including SPSS 21.0 followed by the processing techniques such as frequency analysis, technical statistical analysis, correlation analysis and regression analysis. As a result, the web design elements of Parallax Scroll One Page were all significant in terms of assessment of usability. Especially, convenience affected all elements highly while interest largely affected Parallax Animation. As for usability, the levels of impact on One Page IA and Scrolling Control were high. In the future, it is expected that Parallax Scroll One Page will work as a design method to increase usability of web users.

무시멘트 모르타르의 알칼리침출에 관한 연구

박준우(Park, Joon Woo),홍성인(Hong, Sung In),정민선(Jung, Min Sun),안기용(Ann, Ki Young) 한국콘크리트학회 2014 한국콘크리트학회 학술대회 논문집 Vol.2014 No.5