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항공전문인력 양성을 위한 교육 시스템 개선에 관한 연구
조영진,최연철,Cho, Young-jin,Choi, Youn-Chul 한국항공운항학회 2015 한국항공운항학회지 Vol.23 No.4
Recently due to shortage of pilots from aviation developed countries such as America, Japan and etc, not even regional airlines but also major airlines are facing difficulties of pilot shortage. Through statistic data, ICAO and Boeing Company are predicting that roughly 8 thousands of new pilots will be short per year. Therefore, to solve this pilot shortage, countries are searching solutions like reducing air route, and extending regular retirement. This study analyzes domestic pilot supply market and compares systems of pilot training between the domestic system and the system of America and Japan. From the comparison, the study has deducted improvements for the role of domestic certification system, ATO(Approval of Training Organizations) operation, and related organizations including the government.
저고도 운용 항공기를 위한 기상정보의 필요성에 관한 연구
조영진,김수로,Cho, Young-Jin,Kim, Su-Ro 한국항공운항학회 2020 한국항공운항학회지 Vol.28 No.1
According to the Ministry of Land, Infrastructure and Transport press release ('18.12.21.) The amendment of the Aviation Business Act will reduce the capital requirements for aviation leisure operators and make it easier to enter aviation leisure businesses by improving regulations on small air transportation business. In addition, as the scale of the UAV(Unmanned Aerial Vehicle) sector is expected to increase globally, the dramatic increase in low altitude operating aircraft, including this, must be taken into account. The low altitude aircraft category is divided into small airplanes, helicopters, light aircrafts and ultra-light aircrafts, and instructors include school instructor pilots and student pilots, military and national helicopter pilots, and aviation leisure operators. In case of low altitude aircraft, there are cases of canceling operations due to low visibility and low clouds, and aircraft accidents due to excessive operation and sudden weather phenomenon. Therefore, in order to prevent low-altitude aircraft accidents, a safe flight plan based on weather conditions and weather forecasts and more accurate and local weather forecasts and weather forecast data are needed to prepare for the rapidly changing weather conditions.
조영진,Cho, Young-jin 한국항공운항학회 2017 한국항공운항학회지 Vol.25 No.3
A flight simulator is an instrument which lets pilots attain proficiency of handling various emergency situations, and the sense of flying. In this thesis, current status of domestic simulators will be stated, and after showing the problems with the present management of these simulators, comparisons of how and what kind of facilities they are managed around the globe will be made. After comparing and analyzing the difference in the way the simulators are ran, measures of improvement in domestically appropriate simulators and increase of operating facilities will be drawn.
조영진,임지형,이용주,남인철,Cho, Young-Jin,Lim, Ji-Hyung,Lee, Yong-Joo,Nam, Inn-Chul 대한후두음성언어의학회 2016 대한후두음성언어의학회지 Vol.27 No.1
Percutaneous dilatational tracheostomy (PDT) has become an increasingly popular method of establishing an airway for patients in need of chronic ventilator assistance. We report a rare case of a 42-year-old female who developed extensive subcutaneous emphysema, bilateral pneumothoraces, pneumomediastinum, and pneumoperitoneum after percutaneous dilatational tracheostomy. The patient suffered from amyotrophic lateral sclerosis, and underwent PDT after a period of mechanical ventilation. During PDT, tracheostomy tube was inserted into the paratracheal space. Follow-up chest radiography and computed tomography of chest and abdomen revealed extensive subcutaneous emphysema, bilateral pneumothoraces, pneumomediastinum, and pneumoperitoneum. The patient was treated successfully with insertion of the thoracostomy tube and conservative care.
유기된 보이드 공간의 전화(轉化)를 통한 공동체 조성계획 - 배다리 산업도로 부지를 중심으로 -
조영진(Cho, Young-Jin),구영민(Koo, Young-Min) 대한건축학회 2019 대한건축학회 학술발표대회 논문집 Vol.39 No.2
Despite the fact that Baedari village is the very Historio-Cultural Preservation Areas exhibiting the modernization of Incheon, the area has been divided into two and remained as a no man’s land with trace of discontinued development by thoughtless urban plan. Having the unexpected void a new strategic turning point by which a mediate platform is to be made for creating a new relationship with neighboring context, the study purpose to generate a new cultural community that succeeds the continuity of daily life by patching the void with the potential of residential and cultural urban fabric.
유로 배치 변경을 통한 용융로용 금속재 냉각 블록의 열신뢰성 향상 방안 연구
조영진(Young Jin Cho),최문규(Moon Gyu Choi) 대한기계학회 2020 大韓機械學會論文集A Vol.44 No.9
본 연구에서는 용광로에서 용기 역할과 냉각 기능을 동시에 담당하는 금속재 수냉 블록의 필드고장품을 수집/분석하여 원인을 규명하고 이를 개선할 방안을 제시하였다. 주 고장 형태는 슬래그 코팅이 유지되지 못한 상황에서 발생되는 블록의 외형 손실과 슬래그 코팅이 유지되는 상태에서 발생되는 블록 표면 균열이었다. 로 운영 조건과 고품 분석 결과를 고려할 때, 고온과 큰 온도 편차가 주 고장가속 요인이었다. 수치 해석 기법으로 최고 온도, 온도 편차 및 응력 분포 측면에서 유로 배치 구조를 검토한 결과, 냉각 블록 중앙부 근처에 유로를 두는 것이 열-기계적 신뢰성 측면에서 가장 유리할 것으로 예측되었다. In this study, failures in furnace cooling block were analyzed to identify their major causes and suggest a plan to correct them. The main failure modes were block shape loss and block surface cracking. Considering the operating conditions and based on the results of the failure analysis, the failure was accelerated owing to high temperature and large temperature deviation resulting from poor cooling performance. To minimize the issues, the maximum temperature, temperature deviation, and stress distribution in the cooling block based on the flow path arrangement were investigated using a numerical analysis. As a result of the review, it was predicted that the arrangement of the flow path near the center of the cooling block would be most advantageous in terms of thermo-mechanical reliability.
Non-Profiling Singular Spectrum Analysis 전처리 기법
조영진(Young-Jin Cho),원유승(Yoo-Seung Won),박애선(Ae-Son Park),한동국(Dong-Guk Han) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6
Side Channel Analysis is powerful attack to recover the secret key by using an extra source of information such as timing, power consumption and electromagnetic leakage. Pre-processing scheme is used to retrieve the secret key in the restricted traces in order to improve the attack performance. One of the pre-processing schemes is Singular Spectrum Analysis, which makes the original traces can be split into main signal traces and noise signal traces. In order to diminish cost of SSA, the adversary should choose the criteria to split actual power consumption into two groups according to degree of noise. In previous paper, the criteria is selected as Signal-to-Noise Ratio (SNR) which is one of profiling schemes. In this paper, in order to use SSA practically, we propose that Normalized Inter-Class Variance (NICV) which is adopted as the criteria is non-profiling scheme doesn"t need to secret key. More precisely, we can distinguish the main signal with the scale of NICV. We demonstrate that our proposal attack method yields significantly similar results with another method using SNR through actual experiments on MSP430 microcontroller unit.