• 한국항공운항학회지
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• 제30권2호
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• pp.44-54
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• 2022

An empirical analysis was conducted on the workload of helicopter pilots flying in high-risk flight environments such as ground obstacles and weather effects at low altitudes. To evaluate the workload, an independent sample t-test was performed using the NASA-TLX evaluation method most suitable for the aviation field, and the workload score was calculated by applying the analytical stratification method (AHP) to compare and analyze private and commercial pilots. There is a significant difference in mean between private and commercial pilots and the result of work load was obtained over 70%. This paper studied the 'surprise and startle effect' on the helicopter field for the first time. In the future, it is intended to contribute to the safe operation of helicopters by presenting a method for effective safety management by utilizing it in the field of education and training for helicopter pilots and providing basic data for preventing accidents caused by human error.

• 한국항공운항학회지
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• 제29권4호
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• pp.28-36
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• 2021

Surprise and Startle are often cited as potential or contributing factors in the cause of aircraft accidents because they can negatively affect pilots' situational awareness and decision-making. Accordingly, it is necessary to more clearly understand the effect on flight safety through the psychological and physiological reactions that occur to the pilots. Therefore, this study empirically analyzed the effects of Surprise and Startle on the pilot's psychological and physiological responses using a helicopter flight training device for the first time in Korea. As a result of the analysis, the ratio of recognition of Startle and Surprise, heart rate, and respiration rate showed a high difference between private pilots and commercial pilots. This is analyzed as the difference between long-term flight experience and flight time. In addition to presenting effective information for improving the education and training field of helicopter pilots in the future, it is intended to provide basic data for related research.

• 대한환경공학회지
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• 제31권12호
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• pp.1123-1128
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• 2009

치과병원에서 가동되는 기기소음이 환자들에게 피해를 줄 것으로 예상되어 치료시(스케일링, 치아제거) 및 비치료시(기기만 가동) 소음특성(소음도, 주파수 특성)을 측정하여 PSIL, NR과 같은 평가방법으로 분석하고 환자들의 기기소음에 대한 반응을 설문조사를 실시하였다. 치료기기로부터 1 m 떨어진 거리에서 측정한 소음도의 범위는 67.7~78.3 dB(A)로 4 k (Hz) 이상의 고주파성분을 나타내고 있으며 응답자의 대부분이 소음에 민감한 반응(기분이 거슬리거나, 병원방문을 망설임, 소름이 돋움, 깜짝 놀람)을 보이는 것으로 조사되었다. PSIL에 의한 소음 평가 및 설문조사 결과 환자와 치과종사자의 대화에는 문제가 없는 것으로 평가되었으나 NR곡선에 의한 평가 결과 NRN에 의한 각 실의 소음기준(ISO) 중 작업장의 소음기준(NRN 60~70 dB(A))을 훨씬 초과하는 수준이었다. 병원을 방문하는 환자들의 소음공포증을 해소시키기 위하여 방음보호구 제공, 저소음 저진동 장비의 선택, 마스킹 효과 등의 다양한 대책을 수립 제공하면 치과의료서비스 질을 개선하고 치과병원 경쟁력을 향상시킬 수 있을 것이다.