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국내 회전익 항공기 사고율 분석 및 사고의 잠재적 조건에 관한 연구
유태정,김칠영,임세훈,Yu, Tae-Jung,Kim, Chil-Young,Lim, Se-Hoon 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.4
There were a total of 65 accidents of helicopers between 1990 and 2013. The overall accidents rate has remained around 8 accidents per 100,000 flight hours, and the fatal rate has stayed at about 8 accidents per 100,000 flight hours. In this study, we conduct a series of statistical analyses to investigate the significance of latent failure of groups that operate the helicopter. Analysis of variance demonstrated significant differences in the latent condition score for the 3 groups, with the lower accidents rate groups reporting better scores of latent condition. Results indicated that there are the significant differences of latent condition in accidents between groups of high accidents rate and groups of low accidents rate.
AHP 방법을 통한 헬리콥터 다빈도 사고의 인적오류 위험도 분석에 관한 연구
유태정 한국항공운항학회 2023 한국항공운항학회지 Vol.31 No.2
Helicopter pilots are required to perform many visual workloads in topographical avoidance, flight path modification and navigation, because helicopters operate at very low altitudes. The helicopter-specific instability also require the pilot to have precise perception and control. This has caused frequent human error in helicopter accidents. In Korea, two to three cases have occurred annually on average over the past 10 years, and this trend has not decreased. The purpose of this study was to identify human error risks in advance to prevent helicopter accidents and to help develop measures for missions and mission phases with high risk of human error. Through the study, the tasks and mission phases where accidents occur frequently were classified and the risk of human error was calculated for each mission phases. To this end, the task of frequent accidents during helicopter missions was first identified, detailed steps were classified, and the number of accidents was analyzed. Next, the AHP survey program was developed to measure the pilot's risk of human error and the survey was conducted on the pilots. Finally, the risk of human error by helicopter mission and by mission phases calculated and compared with the actual number of accidents.
유태정,권영국,송병흠,Yu, TaeJung,Kwon, YoungGuk,Song, Byeong-Heum 한국항공운항학회 2020 한국항공운항학회지 Vol.28 No.4
There are two to three helicopter accidents every year in Korea, representing 5.7 deaths per 100,000 flights. In this study, an analysis was conducted on helicopter accidents that occurred in Korea from 2005 to 2017. The accident analysis was based on the aircraft accident and incident report published by the Aircraft and Railway Accident Investigation Board. This Research analyzed the characteristics of accidents occurring in Korea caused by human error by pilots. Accident analysis was done by classifying the organization, flight mission, aircraft class, flight stage, accident cause, etc. Pilot's huan error was classified as Skill-based error, decision error and perceptual error in accordance with the HFACS taxonomy. The accidents caused by pilot's human error were classified into five categories: powerlines collision, loss of control, fuel exhaustion, unstable approach to reservoir, and elimination of tail rotor.
조직영향이 조종사들의 불안전행위의 전제조건에 미치는 영향 - HFACS를 중심으로
유태정,송병흠 한국항공운항학회 2017 한국항공운항학회지 Vol.25 No.4
The Human Factors Analysis and Classification System (HFACS) is a general human error framework originally developed and tested within the U.S. military as a tool for investigating and analyzing the human causes of aviation accidents. Based upon Reason’s (1990) model of latent and active failures, HFACS addresses human error at all levels of the system, including the condition of aircrew and organizational factors. As a result, this study aims to examine the influence between the latent conditions based on HFACS. This study seeks to verify the factors of “Organizational Influence” effecting the “Precondition for Unsafe Acts” of HFACS. The results of empirical analysis demonstrated that the organizational influence had a positive influence on precondition for unsafe act, especially the “Organizational Climate” of organizational influence had even greater influence on precondition for unsafe acts.
UAM 수직이착륙장(Vertiport)의 장애물제한표면 적용 기준에 대한 연구
유태정 한국항공운항학회 2023 한국항공운항학회지 Vol.31 No.1
In recent years, UAM (Urban Air Mobility) has emerged as a solution to these urbanization problems, and many related reports and diverse prospects have been reported. UAM flights are planned to take off and land at a Vertiport located in the city center and fly along a pre-established corridor. In order for UAM to operate safely in the city center, it must ensure a safe flight path that avoids the buildings in the city center and many surrounding obstacles. Therefore, in this study, we compared and examined the installation standards of the obstacle limitation surface necessary for UAM to take off and land safely at the Vertiport. First, we analyzed the helicopter obstacle limitation surfaces in Japan and overseas, and the UAM Vertiport installation standards and obstacle limitation surface application standards recently announced at the FAA and EASA. It identified differences and similarities between heliport and Vertiport, and considered improvements to domestic helicopter obstacle limitation surfaces and criteria that could meet FAA and EASA standards.
대학생이 지각한 부모의 양육태도가 우울과 스마트폰 중독에 미치는 영향
유태정 ( Tae Jung Yoo ),김석선 ( Suk Sun Kim ) 한국간호과학회 정신간호학회(구 대한간호학회정신간호학회) 2015 정신간호학회지 Vol.24 No.2
Purpose: The purposes of this study were to examine differences in depression and smartphone addiction among four styles of perceived parenting, and determine whether the perceptions of paternal and maternal parenting are associated with depression and smartphone addiction among college students. Methods: A cross-sectional descriptive correlational design was used. A convenience sample of 378 undergraduate students responded to the survey. Data were analyzed using ANOVA, Pearson correlation, and multiple regression with IBM SPSS statistics version 21. Results: Levels of depression and smartphone addiction were significantly different according to the four styles of perceived parenting (optimal parenting, affectionate constraint parenting, affectionless control parenting, and neglectful parenting). Scores of depression and smartphone addiction in the group with perceived affectionless control parenting were higher than those in the other groups. In a regression model, maternal care and paternal overprotection were significantly associated with depression. Also, maternal overprotection was the only significant predictor of smartphone addiction. Conclusion: These results suggest that students who perceive that both fathers and mothers are low in care, warmth, and support; but high in overprotection, control and intrusiveness are vulnerable to depression and smartphone addiction. Targeted interventions to change and reframe students` perception of paternal and maternal parenting in a positive way may reduce their depression and smartphone addiction.
Long face와 Normal face인 성인에서의 교합력에 관한 연구
유태정(Tai-Jyung Yoo),손병화(Byung-Wha Sohn) 대한치과교정학회 1990 대한치과교정학회지 Vol.20 No.3
Until now it has not surely been pointed out about the relation between the biting force and the facial types in scientific view. But it´s correlation was assumed by several scientists: recently some literatures reported about the maximum biting force and facial types, but there´s only a little articles about the relation between the biting force(biting force contain maximum biting force, chewing force and swallowing force) and facial type. So this study was, firstly, performed to establish the relation of the normal face and long face versus biting force. 2ndly it was performed to establish the relation between the difference in mouth opening degrees versus biting force. 3rdly it was performed to establish the relation between male and female versus biting force. Biting force was measured from 56 adults (normal 26, long 30) whose samples was selected from Yonsei university students and Hospital patients. Sample was divided into 2groups (normal and long) by lateral cephalogram. The results of this study was obtained as follows. 1. Maximum biting force and chewing force in long face was smaller than normal face. 2. When the thickness of transducer was changed from 6mm to 9mm, maximum biting force and chewing force was larger than before. 3. In case of comparing with male and female, male was larger than female in maximum biting force and chewing force.