SMART 연구로 3차원 성능 해석기 개발(II) - 전/후처리 프로세서

윤한영,이규형,황영동,김희철,지성균 한국특허학회 2004 특허학연구 : 한국특허학회지 Vol.6 No.4

미세조류 이용 바이오디젤 항공유 기술개발 동향 연구

윤한영,Han-Young Yoon 한국항공운항학회 2024 한국항공운항학회지 Vol.32 No.2

Microalgae are aquatic microorganisms capable of photosynthetic growth using water, carbon dioxide and sunlight, and can replace petroleum for transportation. It is receiving great attention as a potential next-generation biological resource. The microalgae biodiesel production process is largely based on the development of highly efficient strains and mass production. It consists of cultivation, harvesting, oil extraction, fuel conversion and by-product utilization. Currently, microalgae diesel is 3-5 times more expensive than petroleum diesel. However, with the optimization of each element technology and the development of integrated systems, not only biofuels, but also industrial materials, wastewater treatment, and greenhouse gases As application expands to various fields such as abatement, the timing of commercialization may be brought forward. Oil prices have recently fallen due to the influence of sail gas. Although there has been a significant drop, global warming is an urgent challenge for current and future generations. In particular, Korea, which does not have oil resources, We must always prepare for political environmental changes, high oil prices, and energy crises. In this paper, the need for eco-friendly biofuel for carbon dioxide conversion. In addition to research trends, domestic and international research trends, and economic prospects, the concept of microalgae and the element technologies of the biodiesel production process are briefly discussed introduced.

원전 CMFD해석을 위한 CUPID 코드 개발

윤한영 한국유체기계학회 2013 한국유체기계학회 학술대회 논문집 Vol.2013 No.11

공항 면세점 위치와 판매품목별 매출액 간 관계성 연구: 인천국제공항 출국장 및 입국장 면세점 사례를 중심으로

윤한영,조성환 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.2

On-arrival duty free will prevent Korean outbound passengers from keeping the duty free items they purchased at the departure during their travel. Most Korean tourists have requested the airport authority to install on-arrival duty free since the grand-opening of Incheon int'l airport. Considering the fierce hub airport competition in the North East Asian region, the Korean government's decision to install on-arrival duty free is regarded as a well-timed intervention. The purpose of the research was to analyze sales correlation based on a comparison of sales of both departure and on-arrival duty free and to propose an administrative implication. Compared to business conglomerates running departure duty free, on-arrival duty free operators, who are small or medium companies, have weakness in product composition, marketing, and merchandising capabilities. According to the analysis, outbound passengers, who purchased fashion accessories and leather products at the departure duty free, tended to purchase cosmetics/perfume or liquor on the arrival duty free. Such complementary purchasing behavior of passengers showed there is barely a negative correlation between departure and on-arrival duty free. 입국장 면세점은 내국인 여객들이 출국장 면세점에서 구매한 물품을 여행 기간 내내 휴대해야 했던 불편함이 해소해 준다. 공항 입국장 면세점 설치는 많은 내국인 여객들이 오래 전부터 요구해 온 사안으로 최근 해외여행이 보편화되고 동북아 주변국 공항들이 허브공항 경쟁을 강화하면서 이번 정부의 결정은 매우 시의 적절했다는 평가를 받고 있다. 본 연구는 출국장 면세점 및 입국장 면세점의 일별 매출 자료를 토대로 판매품목 별 매출 액 간 관계성을 분석하고자 하였다. 이러한 관계성 분석을 토대로 인천국제공항 입국장 면세점 개장이 기존 출국장 면세점 매출에 긍정적 또는 부정적 영향을 미쳤는지 실증적으로 분석하고 이를 토대로 정책적 시사점을 제시하고자 하였다. 중소기업이 입국장 면세점 사업자로 선정되고 판매품목이 제한되어 가격경쟁력과 상품구성 및 기획력 등에서 대기업 위주의 출국장 면세점 사업자와 대등한 경쟁이 될 수 없는 취약점을 내포하고 있다. 향후 현재와 동일한 여건이라면 출국장 면세점에서 고관여 제품(패션악세사리, 가죽피혁 등)을 구매한 출국여객과 이외의 상품을 구매한 경우 출입국시 상호 보완적인 구매행태를 보이고, 매출에 있어 자기잠식이 발생하지 않고 있어 사업초기에 전개하는 상품기획과 마케팅 활동을 더욱 활성화할 때 매출증대와 인지도를 강화할 수 있겠다는 시사점을 도출하였다.

Homo Soccers의 동네 축구 이야기 (18) : 머나먼 원정경기

윤한영 열린전북 2012 열린전북 Vol.154 No.-

Perceptions of Prophylactic Mastectomy in Korea

윤한영,심정수,이종원 대한성형외과학회 2016 Archives of Plastic Surgery Vol.43 No.1

Background Increasingly, prophylactic mastectomy has been evaluated as a treatment of breast cancer. Hereditary breast cancer now accounts for approximately 5%–10% of all cases of breast cancer, meaning that the widespread implementation of prophylactic mastectomy may significantly reduce the occurrence of breast cancer. However, prophylactic mastectomy is rarely performed in Korea. Therefore, in this study, we assessed Koreans’ attitudes toward and awareness of preventive mastectomy. Methods This was a prospective study of a cohort of patients attending outpatient clinics and their relatives. Data were collected using self-administered questionnaires assessing sex, age, educational level, knowledge of breast cancer, understanding of prophylactic mastectomy, attitudes toward prophylactic mastectomy, and reasons for choosing prophylactic mastectomy. Results Sixty-five patients were included. Most patients (36.9%) were between 40 and 49 years of age and 58.4% were college graduates. Only six respondents (9%) understood prophylactic mastectomy, and 17 respondents (27%) stated that they would agree to undergo prophylactic mastectomy if necessary. Reasons given for refusing prophylactic mastectomy included aesthetic concerns (38%), the perception that it would not cure the disease (26%), possible surgical complications (24%), and financial cost (6%). Conclusions In this study, most of the respondents showed a poor knowledge of prophylactic mastectomy. Ultimately, it will be necessary to establish medical guidelines for patients with a high risk of breast cancer, with the objective of providing accurate information and proper treatment at hospitals.

Delayed Reduction of Nasal Bone Fractures

윤한영,한동길 대한두개안면성형외과학회 2016 Archives of Craniofacial Surgery Vol.17 No.2

Background: Nasal bone fractures are managed by closed reduction within the 2-week period, and are managed by secondary correction after this time. There is little literature on the delayed reduction for nasal bone fractures beyond the 2-week duration. We report our experience with nasal fractures, which were reduced beyond this period. Methods: A retrospective review was performed for all patients who had undergone closed reduction of isolated nasal bone fracture. Patients were included for having undergone reduction of nasal bone fractures at or more than 2 weeks after the injury. Medical records were reviewed for demographic information, injury mechanism, fracture type, delay in treatment, and cause for delay. Postoperative outcomes were evaluated using computed tomography images. Results: The review identified 10 patients. The average reduction time was 22.1 days. Five of patients underwent reduction between days 15 and 20, and the remaining five patients underwent reduction between days 21 and 41. The postoperative outcomes were excellent in 8 patients and good in 2 patients. Conclusion: Outcomes were superior for nasal fractures with displaced end plates and multiple fracture segments. Our study results appears to support delayed reduction of isolated nasal fractures in the presence of factors that delay bony reunion.

Recent Improvements in the CUPID Code for a Multi-Dimensional Two-Phase Flow Analysis of Nuclear Reactor Components

윤한영,이재룡,김형래,박익규,송철화,조형규,정재준 한국원자력학회 2014 Nuclear Engineering and Technology Vol.46 No.5

The CUPID code has been developed at KAERI for a transient, three-dimensional analysis of a two-phase flow in lightwater nuclear reactor components. It can provide both a component-scale and a CFD-scale simulation by using a porousmedia or an open media model for a two-phase flow. In this paper, recent advances in the CUPID code are presented inthree sections. First, the domain decomposition parallel method implemented in the CUPID code is described with theparallel efficiency test for multiple processors. Then, the coupling of CUPID-MARS via heat structure is introduced,where CUPID has been coupled with a system-scale thermal-hydraulics code, MARS, through the heat structure. Thecoupled code has been applied to a multi-scale thermal-hydraulic analysis of a pool mixing test. Finally, CUPID-SG isdeveloped for analyzing two-phase flows in PWR steam generators. Physical models and validation results of CUPID-SGare discussed.

콜드체인과 친환경 기술을 활용한 지방공항 화물터미널 발전 방안 연구: 국내외 공항 운영 사례를 중심으로

윤한영,박성식 한국산학기술학회 2024 한국산학기술학회논문지 Vol.25 No.7

본 연구는 신선화물을 처리하는 콜드체인 현황과 관련 친환경 기술에 대한 선행연구들을 고찰하여 항공화물터미널 발전을 위한 이론적 토대를 조사하고자 하였다. 아울러 국내외 공항들 중 신선화물 처리시설을 운영하는 공항사례들을 살펴보고 친환경 기술을 적용하여 탄소 배출 저감에 기여하고 있는 공항 화물터미널의 운영 사례들을 분석하고자 하였다. 국내 15개 지방공항들은 항공화물 물동량 수준이 거의 없는 상황임을 감안할 때, 기존에 계획되었거나 건설된 화물터미널 시설을 확장한다기 보다 지방공항 산업 권역에 특성화 된 콜드체인 시설을 구축하는 방향으로 운영 전환이 요구된다. 최근 들어 지방마다 지역에 특화된 유기농 농축수산물 그리고 바이오·의약품 및 포장식품(김치 등)이 항공화물 수출길 판로를 모색하고 있다. 지방공항이 친환경 기술을 적용한 콜드체인 시설을 화물 터미널 구역 내 구비한다면산업 권역 내 항공화물 물동량이 인천국제공항으로 가지 않고 자체적으로 물동량을 처리할 수 있으며 지역의 업체는인천국제공항까지 운송되는 물류비용과 시간을 절약할 수 있을 것이다. 지자체는 지역 내 공항에 콜드체인 시설 구축을중앙정부는 포워더 업체들이 지방공항에 정착할 수 있는 중장기 기본계획 및 세제 인센티브 등에 대한 정책적 배려가필요할 것이다. This study examined the theoretical foundation for developing air cargo terminals by examining the status of the cold chain that handles fresh cargo and previous studies on related eco-friendly technologies. In addition, this study evaluated cases of airports operating fresh cargo handling facilities among domestic and foreign airports and analyzed operation cases of airport cargo terminals contributing to reducing carbon emissions by applying eco-friendly technology. Considering that the 15 local airports in Korea have almost no air cargo volume, there was a shift in operation toward building specialized cold chain facilities in the local airport industrial area rather than expanding the planned or constructed cargo terminal facilities. If a local airport has a cold chain facility using eco-friendly technology within the cargo terminal area, the air cargo volume within the industrial area can be handled independently rather than going to Incheon International Airport, saving local companies logistics costs and time.

SMART 연구로 3차원 성능 해석기 개발(I)

윤한영,이규형,황영동,김희철,지성균 한국특허학회 2004 특허학연구 : 한국특허학회지 Vol.6 No.4