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마스크 착용 여부와 유형에 따른 심장압박의 정확도, 피로도 및 생리학적 변화에 미치는 효과
방성환(Sung-Hwan Bang),송효숙(Hyo-Suk Song),심규식(Gyu-Sik Shim),안희정(Hee-Jeong Ahn) 한국컴퓨터정보학회 2023 韓國컴퓨터情報學會論文誌 Vol.28 No.7
본 연구는 심폐소생술 시 착용하는 마스크의 유형에 따라 심장압박의 정확도, 피로도 및 생리학적 변화를 파악하고자 한다. 연구는 2022년 5월 9일부터 12일까지 D대학교 응급구조과 재학생 중 BLS provider를 소지하고 있는 학생 총 24명을 대상자로 선정하여 수술 마스크(Dental mask), 미세입자 94%차단마스크(KF94 mask)를 각각 12명씩 착용하고 총 7회에 걸쳐 2분간 심폐소생술을 실시하였다. 연구 결과, 마스크 유형에 따른 구조자의 가슴압박의 질 분석에는 KF94를 착용한 그룹에서 압박속도(F=24.91, p<.001),와 손의 위치불량(F=14.54, p=.024)에서 유의한 차이를 보였고, 피로도를 분석한 결과에서는 Dental mask그룹(F=51.16, p<.001)과 KF94그룹(F=63.49, p<.001) 모두에서 유의한 차이를 보였다. 생리학적 변화를 분석한 결과에서 심박동수를 살펴보면, Dental mask그룹(F=34.79, p<.001)과 KF94그룹(F=35.55, p<.001) 모두에서 유의한 차이를 보였고, 호흡수 측정결과에서도 Dental mask그룹(F=25.02, p=.001)과 KF94그룹(F=23.03, p=.002) 모두에서 유의한 차이를 보였다. 따라서 현장활동의 가장 중요한 심폐소생술시에는 효율적인 가슴압박의 정확도와 구조자의 피로도 및 생리학적 변화의 감소를 위해서는 구조자의 유형에 따른 개인보호장비를 착용하는 것이 필요할 것이다. The purpose of this study was the accuracy of cardiac compression, fatigue, and physiological changes of the rescuer for different mask type in cardiopulmonary resuscitation(CPR). Data collection was from 9 to 12 May 2022, the participants were a total of 24 paramedic students with a BLS provider at D University. The students participated in an experiment in which 12 students each wore a surgical mask (Dental mask) and a fine particle 94% blocking mask (KF94 mask) and performed CPR for 2 minutes over a total of 7 times. As a result of the study, in the analysis of the quality of the rescuers chest compression according to the type of mask, there was a significant difference in the compression speed (F=24.91, p<.001) and bad compression hand position (F=14.54, p=.024) in the group wearing the KF94, Fatigue showed significant differences in both the Dental mask group (F=51.16, p<.001) and the KF94 mask group (F=63.49, p<.001). Among the physiological changes, heart rate showed a significant difference between the Dental mask group (F=34.79, p<.001) and the KF94 mask group (F=35.55, p<.001), and the respiratory rate showed a significant difference between the Dental mask group (F=25.02, p=.001) and the KF94 mask group(F=23.02, p=.002). Therefore, in order to improve the quality of efficient chest compression and reduce the fatigue and physiological changes of rescuers, it will be necessary for rescuers to wear suitable personal protective equipment.
방성환(Sung-Hwan Bang),이동렬(Dong-Ryul Lee) Korean Society for Precision Engineering 2021 한국정밀공학회지 Vol.38 No.8
The aim of this study is to numerically investigate the cooling performance of the electric vehicle motor depending on the attachment of the heat sink and materials to the cooling channel. The research focused on the numerical comparison of forced convective heat transfer coefficients with case 1 (Heat Sink-None, Cooling Channel-Al), case 2 (Heat Sink-None, Cooling Channel-Metal Hybrid Material), case 3 (Heat Sink-4EA, Cooling Channel-Al), and case 4 (Heat Sink-6EA, Cooling Channel-Al). To compare the cooling performance for novel design of the smart cooling system, selected local positions for various temperature distributions were marked on the coil surface. Normalized local Nusselt number of the cooling area at the normalized width position indicated that cooling performance of case 1 was on an average 8.05, 0.57, and 5.85% lower than that of cases 2, 3, and 4, respectively.
나성룡,방성환,Na, Seongryong,Bang, Sung-Hwan 한국통계학회 2013 응용통계연구 Vol.26 No.1
이 논문에서는 고장감지장치(FDE)가 시스템 가용도에 미치는 영향을 연구한다. 주시스템(MS) 수리 도중에 고장이 발생한 FDE를 수리하기 위한 새로운 수리 정책을 고려한다. 이 논문의 주요 목적은 MS의 가용도를 계산하고 비교하는 데에 있다. In this paper we study the effect of failure detection equipment(FDE)s on system availability. A new repair scheme is considered for the step of repairing FDE which becomes out of order in the course of repairing the main system(MS). We compute and compare the availability of MS.
소방공무원과 해양경찰공무원의 COVID-19 감염예방 행동에 대한 분석
송효숙(Hyo-Suk Song),방성환(Sung-Hwan Bang),심규식(Gyu-Sik Shim),김은미(Eun-Mee Kim) 한국컴퓨터정보학회 2021 韓國컴퓨터情報學會論文誌 Vol.26 No.12
코로나 바이러스 감염증-19(COVID-19) 펜데믹이 선포되고, 세계 각국에서 확진자와 사망자와 증가함에 따라, 전 세계가 두려움에 휩싸여 있다. 이에 본 연구에서 건강 믿음 모형(Health Belief Model)을 이론적 기반으로 소방공무원과 해양경찰공무원의 감염예방행동의 심리적 요인을 분석하였다. 두 집단 사이의 COVID-19 감염 예방 행동의 유의한 차이는 없었지만, 일반적 특성에서 지각된 질병 감염 가능성, 지각된 심각성, 지각된 효과와 COVID-19 감염 예방 행동 사이에는 유의적인 양의 상관관계를 보였다. 지각된 장애요인과는 유의미한 차이를 보이지 않았다. 이 연구는 건강 믿음 모형으로 소방공무원과 해양경찰공부원을 대상으로 한 첫 번째 분석으로 그 의의가 있고, 신종 전염병 예방 행동의 수행을 위한 기초자료로 활용될 수 있다는 점에서 큰 의의가 있다고 볼 수 있다. As the coronavirus disease(COVID-19) pandemic is declared and the number of confirmed cases and deaths increases in countries around the world, the world is gripped with fear. Therefore, in this study, psychological factors of infection prevention behaviors of firefighters and maritime police officers were analyzed based on the Health Belief Model. Although there was no significant difference in the COVID-19 prevention behaviors between the two groups, there was a significant positive correlation between the perceived disease infection possibility, perceived severity, and perceived benefits in the general characteristics and the COVID-19 prevention behaviors. There was no significant difference with perceived obstacles. This study is of great significance in that it is the first analysis of firefighters and maritime police officers as a health belief model, and can be used as basic data for the implementation of new infectious disease prevention actions.
고품질의 인공호흡 제공을 위한 호흡량 측정기 술기교육의 효과
임재란(Jae-Ran Lim),방성환(Sung-Hwan Bang),송효숙(Hyo-Suk Song),심규식(Gyu-Sik Shim),박호진(Ho-Jin Park) 한국컴퓨터정보학회 2024 韓國컴퓨터情報學會論文誌 Vol.29 No.3
This study aims to investigate the appropriate volume of artificial ventilation and success rate when Basic - emergency medical Technician administer bag valve mask(BVM) artificial ventilation to patients experiencing respiratory failure or respiratory arrest using a respiratory rate measurement device. The research was conducted from December 11th to 12th, 2023, targeting 20 Basic - emergency medical Technicians enrolled at D University. Ten participants were selected for the experimental group, receiving BVM ventilation training with the use of a respiratory rate measurement device, while the other ten were assigned to the control group, receiving BVM ventilation training without the use of a respiratory rate measurement device. The experiment involved providing artificial ventilation for 2 minutes. The results of the study indicated that the control group did not provide accurate tidal volume (p=.025). The experimental group demonstrated a higher success rate of ventilation over the 2-minute period, while the control group showed a significant difference (p=.001). Subjective perception of tidal volume and objectively measured tidal volume also exhibited a significant difference in the control group (p=.010). Therefore, training with a respiratory rate measurement device can align the subjective perception of tidal volume with objective measurements, increase the success rate of ventilation, and potentially contribute to improving survival rates in patients experiencing respiratory failure or respiratory arrest during cardiopulmonary resuscitation.