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선체 Shell FE 모델 내 용접부의 Solid 요소변환 자동화 시스템
유진선(Jinsun Yoo),하윤석(Yunsok Ha) 대한용접·접합학회 2016 대한용접·접합학회지 Vol.34 No.2
FE analyses for weldment of ship structure are required for various reasons such as stress concentration for bead tow, residual stress and distortion after welding, and hydrogen diffusion for prediction of low temperature crack. These analyses should be done by solid element modeling, but most of ship structures are modeled by shell element. If we are able to make solid element in the shell element FE modeling it is easily to solve the requirement for solid elements in weld analysis of large ship structures. As the nodes of solid element cannot take moments from nodes of shell element, these two kinds of element cannot be used in one model by conventional modeling. The PSCM (Perpendicular shell coupling method) can connect shell to solid. This method uses dummy perpendicular shell element for transferring moment from shell to solid. The target of this study is to develop a FE pre-processing system applicable at welding at ship structure by using PSCM. We also suggested glue-contact technique for controlling element numbers and element qualities and applied it between PSCM and solid element in automatic pre-processing system. The FE weldment modeling through developed pre-processing system will have rational stiffness of adjacent regions. Then FE results can be more reliable when turn-over of shipblock with semi-welded state or ECA (Engineering critical assessment) of weldment in a ship-block are analyzed.
유진이(Yoo, Jin-Li),전준호(Jun, Joon-Ho),성언경(Sung, Un-Gyung),이윤배(Lee Yoonbae) 한국산학기술학회 2007 한국산학기술학회 학술대회 Vol.- No.-
지구의 온난화를 가속시키는데 일조하고 있는 이산화탄소(CO₂)와 Epoxy를 Tetrabutylammonium bromide를 촉매로 하여 초임계 상태에서 반응시켜 2차 전지의 전해질 물질로 사용 가능한 4-ethyl-1,3-dioxolan-2-one, 4-methyl-1,3-dioxlan-2-one, 4-phenyl-1,3-dioxolan-2-one, 4-Chloromethyl-1,3-dioxolan-2-one을 합성하여 ¹H-NMR을 이용하여 분석하였다.
유진만(Jin-Man Yoo),한인수(In-Soo Han),오근엽(Keun-Yeob Oh) 한국콘텐츠학회 2017 한국콘텐츠학회논문지 Vol.17 No.4
본 연구에서는 정액연구 지원방식에 대한 정량평가 방법을 연구하고, 효율적인 평가방법을 확립하기 위한 모델을 만들었다. 첫째, 기존의 평가 시스템을 분석하여 몇 가지 문제점과 과제를 발견했다. 둘째, 정액연구 지원방식에 대한 정량평가 방법을 제안하고, 20만개 이상의 데이터와 모델을 이용하여 시뮬레이션하였다. 셋째, 제안된 모델을 시험하여 최적의 모델을 찾았다. 그리고 이러한 결과에 따라 몇 가지 정책적 시사점을 제시하였다. This research investigates the quantitative screening methods for the Grant Funding system and seeks for the efficient evaluation of a number of proposals. We search foreign cases of Grand Funding, but we found no appropriate model for using in Korea. Thus, we had to develope our own model for better screening. First, we analyse the existing evaluation system and find some problems and challenges. Second, we suggest a quantitative screening system for Grant Funding with a numeric model, and operates a tedious simulation by using the previous data and our suggested model. Third, we test the suggested model and find the optimal model by using simulation method The number of data analysed for simulation is larger than 200 thousands. Last, we suggest some brief policy implications based on the results in the paper.
유진수 ( Jin Soo Yoo ) 한국산업조직학회 2014 産業組織硏究 Vol.22 No.2
본 논문은 인적분할을 통한 지주회사 전환과정에서 나타난 대주주 지분율의 변화 및 주가의 변화를 분석하고 있다. 분석은 주식시장에 상장된 일반지주회사를 대상으로 이루어졌다. 분석결과, 지주회사 전환과정에서 대주주의 지주회사 지분율뿐만 아니라 사업회사 지분율도 크게 높아진 것으로 나타났다. 또한 지주회사 전환과정에서의 주가 동향을 분석한 결과, 지주회사의 주가는 크게 하락한 반면 사업회사의 주가는 크게 상승함으로써, 대주주가 지주회사의 지분율을 높이는데 크게 유리하게 작용했던 것으로 나타났다. This paper examines changes in the stock share of the major shareholder as well as changes in the stock price in the process of spin-off into a holding company. Analysis was limited to the holding companies listed in Korean stock market. Result shows that the shares of the major shareholder increased not only for the holding company but also for the operating company in the process of the spin-off. It also shows that the stock prices of the holding company and the operating company moved in opposite directions, so that the major shareholder gained more shares of the holding company.
유진아 ( Jin A Yoo ),정희선 ( Hee Sun Jeong ) 한국식품영양학회 2011 韓國食品營養學會誌 Vol.24 No.3
This study was performed to investigate the level and recognition and interest in nutrition labeling in restaurants according to consumer interest levels in health and to suggest its application to restaurant lunches. By considering various statistics and data on the frequency of reasons for dining-out, this study examined worker restaurant lunches and investigated the level of recognition of interest in nutrition labeling, the type of nutrition information that is of interest and the preferred format of labeling according to the level of interest in health. According to the results, while the frequency of dining-out by workers was high, their consideration for health and nutrition labeling in restaurants was low. However, a high percentage of consumers responded that nutrition labeling was a customer right and necessary to improve the quality of menu items as well as public health. Therefore, active promotion of nutrition labeling in the dining industry is necessary. Interest levels in additives, product origin and menu ingredients indicated in restaurant menus were higher than for nutritional information such as nutrients and calories. When the preferred format for providing nutrition information was investigated, consumers preferred information written on a menu board, and they wanted to broaden the range of information included in nutrition labeling for menu items beyond calories and nutritional facts. Based on these results, recognition of nutrition labeling in restaurants was found to below and the interest level in health was also lower than expected. However, most consumers responded that nutrition labeling was helpful in choosing menu items can be a tool for nutrition education and can play a role in improving the recognition of nutrition. Therefore, active promotion of nutrition labeling by the dining industry is necessary.