이종소재인 CFRP와 알루미늄의 접착력 향상을 위한 Bead의 영향 평가

신동우,김진재,이종혁,권일준,박성민,Shin, Dong-Woo,Kim, Jin-Jae,Lee, Jong-Hyuk,Kwon, Il-Jun,Park, Sung-Min 한국복합재료학회 2017 Composites research Vol.30 No.4

In this paper, we investigated the application method and properties of 0.1 mm, 0.2 mm and 0.3 mm beads, which can secure a certain thickness due to the molding stability of joint surfaces of different materials (aluminum and composite). In order to verify this, the influence was evaluated according to the thickness of the adhesive in the Double lap test and the FEM simulation. As a result, it was confirmed that as the content of the bead of the adhesive increased more than 1%, the strength of the adhesion increased and the elongation decreased. We confirmed as the size of the bead became larger, the rigidity became lower and the elongation increased. 본 논문에서는 알루미늄과 복합재료에 대한 이종소재 접합면의 성형안전성을 위해 일정한 두께를 확보할 수 있는 0.1 mm, 0.2 mm, 0.3 mm bead의 적용 방법과 물성변화에 대해 연구하였고, 이를 검증하기 위해 더블랩 시험과 FEM 시뮬레이션으로 접착제의 두께에 따라 미치는 영향을 평가하였다. 그 결과, 접착제에 bead의 양을 1% 이상 함량이 증가함에 따라 접착 소재의 강도가 높아지고 신율이 감소함을 확인하였고, bead의 크기가 커질수록, 강성은 낮아지고, 신율은 증가함을 확인하였다.

탄소-아라미드 복합소재 로봇암의 진동감쇠 물성시험과 전산해석

신동우,권일준,박성민,박용민,최진경,Shin, Dong-Woo,Kwon, Il-Jun,Park, Sung-Min,Park, Yong-Min,Choi, Jin-Kyung 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.6

In accordance with the increase in demand for LCDs and the increasing industry competition with higher productivity, the size of LCD glass has been gradually increasing. When transferring a robot hand by setting up an LCD panel, the vibration increases the inertia and load of up and down motion, rotational motion, and mobile motion of the whole robot. With regards to the up and down motion of the robot hand, when time is short on study of the vibration reduction. In this paper, we evaluate the structural arm of an LCD robot by using finite element analysis and fast Fourier transform (FFT). An impact test of the arm, which is made from the composite materials of carbon fiber reinforced plastics (CFRP) and Kevlar fiber reinforced plastics (KFRP) for lightweight and damping, was conducted.

이하선에 발생한 소관 선종

신동우,정웅윤,심정연,박정수,Shin Dong-Woo,Chung Woung-Youn,Shim Jeong-Yun,Park Cheong-Soo 대한두경부종양학회 1997 대한두경부 종양학회지 Vol.13 No.2

Parotid canalicular adenoma is a benign neoplasm that is predominantly composed of branching and interconnecting cords of single or double rows of columnar epithelium in a very loose stroma. There has been considerable confusion in the literature concerning the terminology of canalicular adenoma. However, thesedays it has been newly-recognized as a discrete entity of the monomorphic adenoma group. Canalicular adenoma has a remarkable predilection for occurrence in the minor salivary glands such as the upper lip, in contrast with basal cell adenoma that occurs predominantly in major salivary glands such as the parotid gland. We have experienced a case of canalicular adenoma of the parotid gland in a 65-year-old woman. The patient had a palpable mass on the preauricular area for the last 15 years and recently noticed a mild pain and discomfort on the mass. Neck ultrasonography showed a low echogenic mass of 1.0cm in diameter in the right parotid gland and a neck CT scan showed a well-enhanced rectangular-shaped mass. A superficial parotidectomy was performed for the lesion and the final pathologic diagnosis turned out to be 'multifocal canalicular adenoma'.

조기 위암의 근치적 절제술 후 재발예측인자

신동우,형우진,노성훈,민진식,Shin Dong Woo,Hyung Woo Jin,Noh Sung Hoon,Min Jin Sik 대한위암학회 2001 대한위암학회지 Vol.1 No.2

Purpose: Even with excellent surgical outcome, recurrence of early gastric cancer (EGC) after a curative resection is not declining because the incidence of EGC is increasing. The aim of this study was to propose an appropriate treatment strategy by assessing the risk factors for recurrence of curatively resected early gastric cancer. Materials and Methods: Of 3662 patients who had undergone gastric resections for gastric cancer from 1987 to 1996, the cases of 1050 curatively resected EGC patients were reviewed retrospectively. Among those 1050 patients, 50 patients ($4.8\%$) were diagnosed as having recurrent cancer, which was confirmed by clinico-radiological examination or re-operation. The risk factors that determined the recurrence patterns were investigated by using univariate and multivariate analyses. Results: The mean time to recurrence was 30.9 months, and hematogenous recurrence was the most frequent type ($32.0\%$). Among the 50 recurred patients, peritoneal recurrence showed the shortest mean time to recurrence ($18.5\pm17.7$months). Between the recurred and the non-recurred patients, there was no statistically significant difference with respect to age, sex, operation type, tumor size, tumor location, gross appearance, or histological differentiation. However, depth of invasion (submucosal invasion) and nodal involvement were significantly different (P<0.001) between the two groups. Using logistic regression analyses, nodal involvement was the only significant risk factor for recurrence in early gastric cancer (P<0.001). The median survival after the recurrence had been diagnosed was 4 months. Conclusion: Although the prognosis for EGC patients is excellent and recurrence of EGC after a curative resection is rare, the time to recurrence and the patterns of recurrence in EGC patients were diverse and unpredictable, and the result after recurrence is dismal. Considering the impact of lymph node metastasis on recurrence of EGC, a systematic lymphadenectomy, rather than limited surgery, should be performed if lymph node involvement is confirmed pre- or intraoperatively. Also if the postoperative pathologic findings reveal lymph node involvement, adjuvant chemotherapy is recommended.

신체 부위에 따른 지방조직의 특성: 컴퓨터단층촬영 및 조직학적 소견

신동우,손대구,박무식,김준형,한기환,Shin, Dong-Woo,Son, Dae-Gu,Park, Mu-Shik,Kim, Jun-Hyung,Han, Ki-Hwan 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5

Purpose: The subcutaneous fat tissue is separated into 2 layers by the subcutaneous fascia: the superficial and deep fat layers. The two fat layers have different structures according to the body regions. The purpose of this study is to evaluate the distribution and pattern of the two fat layers in the human body by computed tomography (CT) and histological analysis according to age, sex, anatomical region, and body mass index (BMI). Methods: This study included 200 males and 200 females who underwent 64-channel dynamic CT in our hospital. The patients were divided into 5 groups according to 10 years of their ages separately in either male or female gender. The thickness of the superficial and deep fat layers was measured in the abdominal, pelvic, and femoral regions, and we analyzed the values. Statistical analyses were performed using SPSS software. The $3{\times}3$-cm whole fat layers were harvested from the same sites of 3 cadavers for histological examination, and one cadaver was dissected for gross evaluation. Results: The total thickness of subcutaneous fat tissue was greater in females than in males, and the ratio of the superficial fat layer to the whole fat layer was higher in females. The superficial fat layer became thinner with increasing age in males. As BMI increased, the total fat layer became thicker, and the superficial fat layer became thicker than the deep fat layer. On histological examination, the superficial fat layer had small adipose lobules and showed a densely distributed pattern in the abdominal region, whereas in the femoral region, it had large adipose lobules and showed a sparsely distributed pattern. There were no significant differences in the histological findings of the deep fat layer between the 3 body regions. Conclusion: Significant differences in histological findings of the two fat layers were found in relation to age, sex, anatomical region, and BMI. The superficial fat layer became thinner with increasing age in males, but it was constant in females. As BMI increased, the total thickness of subcutaneous fat tissue became greater, and the superficial fat layer became thicker than the deep fat layer. Our measurements can be used to understand the characteristics of the fat layers in relation to age, sex, anatomical region, and BMI.

유한요소법을 이용한 직선형 Roller Hemming 연구

신동우(Dong-Woo Shin),윤영식(Young-Sik Yoon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10

The Roller Hemming technology has been recognized as a new production technique which contributes to a light-weight, low-cost and at a time production of many type of car. Roller Hemming is to attach inner panel and outer panel in production of car, by using a robot and roller. Therefore, motion of Roller and materials of panel determines external quality of automotive outer panels such as doors, hood and trunk lid. In this study, implicit FEM(Finite Element Analysis) of straight aluminum panel Roller Hemming process simulation by using the ANSYS code. This study show Hemming errors and factors of Roller Hemming process, for example Roll-in, Turn-Down and Reaction Force.

암호자산공개(ICO)의 규제 방향

신동우(Shin, Dong Woo),고동원(Ko, Dong Won) 성균관대학교 법학연구원 2021 성균관법학 Vol.33 No.2

금융기술(FinTech)과 블록체인(block chain) 기술이 발전하면서 비트코인이나 이더리움과 같은 암호자산(crypto asset)이 주목받고 있다. 더불어 자금 조달을 위해서 토큰(token)을 발행하여 새로운 암호자산을 공개하는 기업도 생겨나고 있다. 이처럼 기업 등이 자금을 조달받으면서 그 대가로 토큰을 제공하는 것을 암호자산공개(Initial Coin Offering: ICO)라고 한다. ICO에 대한 규제가 이루어지지 못하는 상황에서 ICO에 투자한 투자자들의 피해가 많이 발생하고 있다. 이러한 문제를 해결하기 위하여 ICO에 대한 적절한 규제가 이루어질 필요가 있는데, 금융당국은 이를 방치하고 있다. ICO에 대한 규제 방안을 적극적으로 모색하는 여러 다른 나라들과 달리 우리나라는 ICO를 전면적으로 금지하고 있다. 투자자 보호 측면과 커지고 있는 암호자산 시장에 대응하기 위해서는 ICO를 전면적으로 금지하기보다는 적절한 규제가 필요하다. 다양한 방식으로 진행되는 ICO에 의해서 발행되는 토큰은 포괄주의를 기본으로 하고 있는「자본시장과 금융투자업에 관한 법률」(‘자본시장법’)상 ‘증권’에 해당할 가능성이 높다. 즉, 미국 연방 대법원이 제시한 ‘Howey 기준’을 적용할 때 ICO 토큰 중 타인의 노력에 의한 이익이 기대되는 경우라면 자본시장법상 ‘투자계약증권’에 해당될 수 있다. 따라서 ICO 토큰을 증권으로 포섭함으로써 자본시장법에 의한 규율을 통하여 투자자를 보호할 수 있으며, 금융당국도 ICO에 대한 전면적 금지라는 입장보다는 적절한 규제방안을 모색하는 것이 바람직하다. As fintech and blockchain technology advance, crypto assets such as Bitcoin and Ethereum are attracting more attention from investors. In recent years, the number of companies issuing new crypto assets for financing is increasing exponentially. In this way, when a company seeks to raise funds from investors and provides tokens in return to them, it is called the initial coin offerings (“ICO”). Recently, the ICOs are rapidly spreading, and as funds are flowing into the ICO markets, however, damages to investors are also increasing. In order to solve this problem, it is necessary to review how the ICOs should be regulated. In this relation, this article intends to analyze the regulatory measures taken in major foreign countries such as the United States, Switzerland and Singapore. Unlike other countries that actively seek regulatory measures, the Korean government has a position to completely ban the ICOs. However, this article argues that it is necessary for the regulator to take a position to regulate the ICOs in order to protect investors. Specifically, with reference to the ‘Howey’ test suggested by the United States’ Supreme Court in relation to ‘investment contract’, this article reviews the standards of “investment contract securities” under the Korean Capital Market Act, and concludes that the tokens issued by the ICOs can be classified as investment contract securities under the Capital Market Act, and then that the ICOs should be regulated under the Capital Market Act, in order to protect investors.

철근콘크리트 대각배근 연결보의 비탄성 해석모델

신동우(Shin, Dong Woo),강석봉(Kang, Suk-Bong) 한국콘크리트학회 2015 한국콘크리트학회 학술대회 논문집 Vol.2015 No.5

불균형모멘트를 재하받는 슬래브-기둥 접합부의 현행 설계기준 평가

신동우(Shin, Dong Woo),최경규(Choi, Kyoung Kyu) 한국콘크리트학회 2011 한국콘크리트학회 학술대회 논문집 Vol.2011 No.5

Effects of stressed condition on lipid synthesis of Phaeodactylum tricornutum

Dong-Woo Shin(신동우),Z-Hun Kim(김지훈),Seong-Joo Hong(홍성주),Choul-Gyun Lee(이철균) 한국신재생에너지학회 2013 한국신재생에너지학회 학술대회논문집 Vol.2013 No.05