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De-epithelialized dermal flap for nipple reconstruction: A modified star flap
Su-Hyun Lee,Deok Woo Kim,Hi Jin You,Jae A Jung,Na Hyun Hwang,Jae Pil You,Eul Sik Yoon 대한성형외과학회 2019 Archives of Plastic Surgery Vol.46 No.4
Background Multiple approaches for nipple reconstruction exist, and none is considered superior to all others. The star flap is one of the most popular methods for nipple reconstruction, but gradual height loss is a major concern. We present a new modification of the star flap that incorporates a de-epithelialized dermal flap, along with the associated surgical results. Methods We reviewed the medical records of patients who underwent nipple reconstruction using the modified star flap method. The design was different from the conventional star flap in that the lateral wings were changed into a trapezoidal shape and de-epithelialized dermal flaps were added. The patients were followed up at 2, 4, 6, and 12 months postoperatively, and nipple height was measured. The postoperative nipple height achieved using the modified method was compared with that obtained using the traditional method. Results From February 2013 to June 2017, 32 patients received surgery using the modified star flap, and 18 patients who underwent nipple reconstruction before 2013 comprised the conventional method group. All patients had undergone breast reconstruction with an abdominal tissue-based flap. The mean follow-up period was 14.4 months in the modified method group and 17.3 months in the conventional method group. The mean maintenance of projection at 12 months postoperatively was 56.28%±18.58% in the modified method group, and 44.23%±14.15% in the conventional method group. This difference was statistically significant (P<0.05). Conclusions The modified method using a de-epithelialized dermal flap provides reliable maintenance of projection in patients who have undergone abdominal tissue-based breast reconstruction.
메밀의 발아와 볶음처리 가공에 따른 생리활성 성분과 항산화 활성 변화
구나경(Na-Gyeong Koo),김형진(Hyeong-Jin Kim),조동기(Dong-Ki Cho),유덕수(Deok-Su Yu),김성훈(Sung-Hoon Kim),이영택(Young-Tack Lee) 한국식품영양과학회 2023 한국식품영양과학회지 Vol.52 No.7
메밀의 발아에 따른 주요 생리활성물질 함량과 in vitro 항산화 활성을 조사하였으며, 발아한 메밀을 차로 제조 시에 볶음처리 가공에 따른 변화를 조사하였다. 메밀 종실은 3일간 발아 시 총 페놀과 총 플라보노이드 함량이 증가하는 추세였으며, 루틴과 GABA 함량 역시 유의적으로 증가하였다. 이에 따라 메밀의 in vitro 항산화 활성(DPPH, ABTS 라디칼 소거능)은 3일간의 발아 중에 증가하였다. 발아시킨 메밀의 볶음 정도에 따른 생리활성 성분을 분석한 결과 총 페놀과 플라보노이드 함량은 볶음 시간 초기에 증가하였으나 볶음이 진행됨에 따라 감소하였으며, 루틴과 GABA 함량 역시 감소하였다. 발아메밀은 볶음처리 가공에 따라 DPPH 라디칼 소거능은 약간 증가하는 경향이었으나 ABTS 라디칼 소거능은 볶음 초기 약간 증가하다 감소하였다. 본 연구에서 메밀의 적절한 발아와 볶음처리 가공은 생리활성 성분을 향상시킨 발아메밀차로 제조하는 데 유용한 방법으로 평가되었다. This study was conducted to investigate the effects of germination period and degree of roasting on the bioactive compounds and in vitro antioxidant activity of dehulled buckwheat groat. During the 3-day germination period, the amounts of bioactive compounds, including total phenolic and total flavonoid compounds, rutin, and γ- aminobutyric acid (GABA), increased. This resulted in increased α,α-diphenyl-β-picrylhydrazyl (DPPH), and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activities. Germinated buckwheat groats were roasted at 200°C, for 7, 15, and 21 min, and the changes in bioactive compounds were assessed. The total phenolic and flavonoid contents increased at 7 min of roasting but decreased as roasting progressed. An increase in roasting time also led to a decrease in the total flavonoid, rutin and GABA contents. Roasting slightly increased the DPPH radical scavenging activity of germinated buckwheat, but prolonged roasting time (21 min) decreased ABTS radical scavenging activity. Hence, this study suggests that proper processing conditions, such as the correct germination period and degree of roasting should be adopted to improve the amount of bioactive compounds in buckwheat groat for the development of germinated buckwheat tea products.
전산유체역학을 활용한 마찰교반용접의 해석적 접근에서 표면추적을 위한 알고리즘 연구
김수덕(Su-Deok Kim),나석주(Suck-Joo Na) 대한용접·접합학회 2016 대한용접·접합학회지 Vol.34 No.3
Friction stir welding(FSW) was studied using commercial tool, FLOW-3D. The purpose of this study is to suggest a method to apply frictional heat in Computational fluid dynamics(CFD) analysis. Cylindrical tool shape was used, and the interface cells between tool surface and workpiece were tracked by its geometrical relations in order to consider the frictional heat in FSW. After tracking the interface cells, average area concept was used to calculate the frictional heat, which is related to interface area. Also three-dimensional heat source and visco-plastic flow were modeled. The frictional heat generation rate calculated numerically from the suggested algorithm was validated with the analytical solution. The numerical solution was well matched with the analytical solution, and the maximum percentage of error was around 3%.
QD-OLED와 양자 CMOS를 이용한 질병 진단 시스템
김나영 ( Na-young Kim ),이규민 ( Gyu-min Lee ),이다은 ( Da-eun Lee ),최시정 ( Si-jung Choi ),김도연 ( Do-yeon Kim ),최영선 ( Yeong-seon Choe ),조덕수 ( Deok-su Jo ) 한국정보처리학회 2023 한국정보처리학회 학술대회논문집 Vol.30 No.2
양자 CMOS 이미지와 QD-OLED 하이드로겔 저온 증폭 기술을 활용하여 기존 코로나 진단법의 한계를 극복하고, Machine Learning 모델을 통해 자동화된 바이러스 검출 시스템을 개발하는 것이다. 이를 통해 전문가 개입 없이도 높은 정확도로 질병 진단을 수행하는 웹 서비스를 구축함으로써, 코로나와 같은 전염병의 조기 진단과 효율적인 대응을 위한 새로운 도구를 제공하는 것이 목표이다. 이를 통해 의료 분야에서의 혁신과 질병관리의 향상에 기여할 것으로 기대된다.
De-epithelialized dermal flap for nipple reconstruction: A modified star flap
Lee, Su Hyun,Kim, Deok Woo,You, Hi Jin,Jung, Jae A,Hwang, Na Hyun,You, Jae Pil,Yoon, Eul Sik Korean Society of Plastic and Reconstructive Surge 2019 Archives of Plastic Surgery Vol.46 No.4
Background Multiple approaches for nipple reconstruction exist, and none is considered superior to all others. The star flap is one of the most popular methods for nipple reconstruction, but gradual height loss is a major concern. We present a new modification of the star flap that incorporates a de-epithelialized dermal flap, along with the associated surgical results. Methods We reviewed the medical records of patients who underwent nipple reconstruction using the modified star flap method. The design was different from the conventional star flap in that the lateral wings were changed into a trapezoidal shape and de-epithelialized dermal flaps were added. The patients were followed up at 2, 4, 6, and 12 months postoperatively, and nipple height was measured. The postoperative nipple height achieved using the modified method was compared with that obtained using the traditional method. Results From February 2013 to June 2017, 32 patients received surgery using the modified star flap, and 18 patients who underwent nipple reconstruction before 2013 comprised the conventional method group. All patients had undergone breast reconstruction with an abdominal tissue-based flap. The mean follow-up period was 14.4 months in the modified method group and 17.3 months in the conventional method group. The mean maintenance of projection at 12 months postoperatively was $56.28%{\pm}18.58%$ in the modified method group, and $44.23%{\pm}14.15%$ in the conventional method group. This difference was statistically significant (P<0.05). Conclusions The modified method using a de-epithelialized dermal flap provides reliable maintenance of projection in patients who have undergone abdominal tissue-based breast reconstruction.
차분진화알고리즘을 이용한 정현파형 주름웨브보의 최적설계프로그램 개발
손수덕(Shon, Su-Deok),유미나(Yoo, Mi-Na),이승재(Lee, Seung-Jae),강주원(Kang, Joo-Won) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.12
Corrugated steel plates offer several advantages that make them preferred materials for use in various structures including bridges and steel frames. Aside from aircraft design, the corrugated steel plate has also been applied to container, bridges, PEB system, etc. Corrugated steel plates have also been the subject of various research efforts. However, these studies focus on the strength of the beams and the buckling analysis of corrugated steel plates. Optimum design of corrugated web beam remains insufficient. Therefore, this study focuses on the structural design program of sinusoidal corrugated web steel beams using Differential Evolution algorithm. A simple beam model is selected as a numerical example to verify the program. The optimum program is compared with the program using Genetic Algorithm.
백수웅(Baek, Su-Ung),양현훈(Yang, Hyeon-Hun),한창준(Han, Chang-Jun),김한울(Kim, Han-Wool),나길주(Na, Kil-Ju),이석호(Lee, Suk-Ho),정해덕(Chung, Hae-Deok),박계춘(Park, Gye-Choon) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
Selenium 물질은 지구상에 많은 양이 존재하고, 가격이 저렴하다. 그 성질은 분광감도가 시감도에 잘 일치하고, 광학적 특성이 뛰어나서 태양전지로 연구도 활발히 진행 중이다. 본 연구에서는 Se박막을 열저항증착방법을 이용하여 증착시, 기판온도를 변화를 시켜 그 구조적특성의 변화를 관찰하였다. 50?C에서 변화를 시작하여 70?C, 100?C의 변화에서 각각 단사정계, 육방정계 결정구조가 나타났다. XRD 분석결과 100?C에서 증착한 sample의 회절강도가 70?C에서 증착한 sample보다 작은회절강도를 나타내었다. 추후 열처리공정등을 통하여 보완하면, CISe 박막 화합물 태양전지 연구에 큰 효과를 나타낼 수 있을 것으로 예상된다.