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EBT(Evidence Based Training) 훈련프로그램의 비행 데이터 분석 활용방안
최지헌,안종훈,김현덕 한국항공운항학회 2023 한국항공운항학회지 Vol.31 No.4
EBT has designed and implemented a training program that relies on evidence from events such as Flight Operation Quality Assurance (FOQA), accidents, and incidents specific to each airline. The goal is to enhance the overall skills of the flight crew. This involves assessing the capabilities of individual crew members and, based on the findings, providing additional training to address any shortcomings. To create a training program aligned with the objectives of EBT, this study focused on analyzing data from hard landing incidents in domestic airlines obtained through FOQA events. A practical EBT training program was then developed, specifically targeting adverse weather conditions. The program evaluates landing capabilities, and the results guide the supplementation of any deficiencies in the landing skills of each flight crew member, ultimately aiming to enhance their confidence.
건강검진 결과에 의한 사후관리 필요여부와 건강행위와의 관련성 - 국민건강영양조사, 제4기 1차년도 자료를 중심으로 -
최지헌,황인영,Choi, Ji-Heon,Hwang, In Young 한국농촌간호학회 2011 한국농촌간호학회지 Vol.6 No.1
Purpose: This study was conducted to estimate the relationship between health behavior and follow-up needed for results of health examinations. Methods: The participants were 2,245 adults over age 19. Data from the National Health and Nutritional Examination Survey VI-1 was used. Health behavior was defined as smoking, alcohol consumption, physical activity, hours of sleep and BMI. Those who needed follow-up care after a health examination were defined as having abnormal blood pressure, abnormal blood sugar, or abnormal blood cholesterol. Results: The proportion needing follow-up was 77.4%. The odds ratio (95%CI) for needing follow-up for blood pressure for men was 1.59 (1.18-2.15) with excessive alcohol consumption over one month, and 2.33 (1.73-3.13) with obesity, and for women, 3.55 (2.66-4.74) with obesity. For blood sugar in men it was 1.59 (1.18-2.15) with excessive alcohol consumption and 2.33 (1.73-3.13) with obesity, and for women, 3.55 (2.66-4.74) with obesity. For low HDL-C in men it was 0.53 (00.40-0.72) with excessive alcohol consumption and 2.39 (1.81-3.15) with obesity, and in women, 0.73 (0.57-0.94) with excessive alcohol consumption and 1.66 (1.29-2.14) with obesity. For high triglycerides it was 2.37 (1.42-2.39) with smoking and 2.34 (1.70-3.22) with obesity in men and in women, 1.51 (1.05-2.16) with obesity. Conclusions: The results of this study indicate that obesity is associated with high blood pressure, high blood sugar, low HDL-C, and high triglycerides.
시스템 다이내믹스를 이용한 남북한 항공수요 예측에 관한 연구
최지헌,원동욱,김규왕 한국항공운항학회 2022 한국항공운항학회지 Vol.30 No.4
This study aims to forecast of Air Passenger Demand between South Korea and North Korea using the system dynamics analysis methodology that is based on the system thinking. System dynamics is not only a tool that makes the systematic thought to a model but also a computer program-based analysis methodology that mathematically models the system varying according to time variation. This study analyzed the causal relationship based on the interrelation among variables and structured them by considering various variables that affect aviation cooperation from the perspective of Air passenger demand forecasting. In addition, based on the causal relationship between variables, this study also completed the causal loop diagram that forms a feedback loop, constructed the stock-flow diagram of Inter-Korean model using Vensim program. In this study, Air passenger demand was using by the simulation variable value into System Dynamics. This study was difficult to reflect the various variables constituting the North Korea environment, and there is a limit to the occurrence of events in North Korea.
최지헌,김진준,이광원,김태훈 한국가스학회 2019 한국가스학회지 Vol.23 No.1
울산, 여수 등 산업단지의 고압매설배관은 주변의 석유화학사의 원료 물질 및 스팀 등 유틸리티 지원을 위해 많은 배관이 매설되어 있음은 물론 독성, 가연성 불활성 가스 등이 고압으로 거미줄처럼 복잡하게 매설되어 공급되고있다. 이에 산업단지배관과 도시가스 매설배관의 안전 관리 현황을 심층 비교 분석한 것을 바탕으로 타 공사에 의한배관손상 영향인자인 굴착빈도, 굴착 깊이, 순찰 주기 등을 분석하고, 타 공사 위험감소 전략에 따른 위험변화 및 상관관계를 비교하여 산업단지 고압 매설배관에 대한 안전 점검 운영 모델을 제시한다.
국내선 항공기 연료소모량 분석을 통한 연료절감 방안연구 - B737 항공기 연료소모량을 중심으로 -
최지헌,이경한,김용옥,김웅이 한국항공운항학회 2022 한국항공운항학회지 Vol.30 No.2
This study analyzed and derived a plan to reduce fuel consumption of domestic aircraft. Specifically, this study tested fuel consumption in the short-distance flights of B737. Fuel consumption was calculated by substituting the simulation variable values into Matlab. The strength of this study is that the actual operating environment was reflected by collecting the B737 flight data. As a result of the study, the domestic fuel consumption rate in the computed flight plan was less than the current fuel consumption rate. Existing limitations of this study is that it was difficult to reflect the various variables constituting the flight environment, and thus there can be errors in the measurement of the fuel consumption. There are two major expected applications from this study. First, applying the plans from this study will lead to a reduction in the amount of fuel and thus provide positive economic effects for commercial airlines. Second, the plan from this study will provide a basis for pilots to predict fuel consumption more accurately. In conclusion, this study proposes a fuel saving plan with useful applications for pilots and airlines.
최지헌,김성엽,김현덕 한국항행학회 2023 韓國航行學會論文誌 Vol.27 No.5
항공사에서는 보다 효과적인 교육훈련을 실시하고자 실무와 연계한 훈련 프로그램을 도입하고자 하였다. 이를 위해 항공사들은 항공 인력의 실무 역량 강화 및 안전 문화 증진을 위해 증거 기반 훈련(EBT)을 시행해 오고 있다. 항공사들은 효과적인 EBT 모델 개발을 위해 운항 데이터 및 사례 연구를 분석하여 항공 인력의 역량 및 실무 능력을 체계적으로 평가할 수 있다. 또한 승무원 자원 관리(CRM)와 같은 기술적 방법 및 인적 요인을 포함하는 전체적인 접근법을 적용하여 EBT 모델을 구성할 수 있다. EBT 도입으로 인해 항공사들은 조종사의 실무 업무에 대한 진단 및 피드백 시스템을 구축하게 되며 개인 맞춤형 교육을 제공할 수 있고 교육 성과를 거쳐 교육 효과를 검증하는 교육훈련 체계를 확립하게 된다. Airlines tried to introduce training programs in connection with practical work in order to provide more effective education and training. To this end, airlines have been conducting evidence-based training(EBT) to strengthen the practical capabilities of aviation personnel and enhance safety culture. Airlines can systematically evaluate the capabilities and practical capabilities of aviation personnel by analyzing operational data and case studies for effective EBT model development. In addition, EBT models can be constructed by applying technical methods such as crew resource management (CRM) and a holistic approach that includes human factors. Due to the introduction of EBT, airlines will establish diagnostic and feedback systems for pilots' practical work, provide personalized education, and establish an education and training system that verifies the effectiveness of education through educational outcomes.
최지헌,유창훈,권영대 보건의료산업학회 2011 보건의료산업학회지 Vol.5 No.4
Many Koreans have been interested in health functional foods(HHFs). Use of health functional foods is growing rapidly. This study aims to identify the determinants of HFFs use focusing on health related factors. The subjects were 24,626 samples from Korea Health Panel in 2008. The subjects were divided into two group: under the 20 years old and 20 old and over. The logistic regression model was used to examine influence of health-related factors on use of HFFs for each group. About thirty percent of the subjects have used HFFs. The larger family size, higher education level of parents, more stable economic status and chronic diseases were positively related to use more HFFs in younger 20 years old. Higher education level, more stable economic status, chronic diseases were more likely to use HFFs in 20 years of age and over. Health related factors such as disability, chronic diseases, admission, and physician visit affect the use of HFFs in both groups. We confirmed that health related factors as well as socio-demographic and economic factors affect use of HFFs. In-depth knowledge about relationship between health related factors and HFFs is required.