In this study, we addressed the prevention of fire extinguishing device malfunction caused by noise in the fire detector of automatic fire extinguishing devices applied to mobile equipment such as armored vehicles and tanks. The automatic fire extinguishing system consists of a fire detection unit, an automatic control unit, and a fire suppression unit. In the case of a fire detector, it is a major component of the fire detection unit. Even though no fire occurred during operation in the field, a number of fire extinguisher sprays occurred, and the malfunction of the fire detector, which is a fire detection unit, was reproduced. The cause was identified as noise in the fire detector connector due to vibration and shock that may occur during operation of the mobility equipment. In order to solve this problem, noise generated momentarily from a fire detector is treated as an exception, and when a fire signal is transmitted from the fire detector to the automatic control unit for more than a certain period of time, Software has been improved to enable fire extinguishers to operate. This study analyzed the causes of malfunctions in automatic fire extinguishing devices, which are components of mobile equipment, and derived improvement measures to improve the reliability of automatic fire extinguishing devices.

In this paper, as there are many cases of fires occurring due to the failure or inoperability of the thermostat of electronic products, the purpose is to test and analyze the risks and probabilities through fire cases and reproduction experiments, and suggest countermeasures. Among electronic products, water purifiers are composed of a refrigerant system with a compressor to make cold water, a heating device to make hot water, and an electric device used as an energy source. Due to the nature of the water purifier manufacturing, these devices are subject to a lot of moisture and dust. etc. exist in large quantities and use electrical energy, so there is a possibility of fire due to short circuit in the wire, electrical abnormal overheating (tracking phenomenon) in the thermostat, electronic board, starting relay, etc., and overheating of the heating device (Band Heater). there is. Therefore, in order to prevent fires from these devices, a system to remove foreign substances inside the water purifier is necessary, the use of heat-resistant (fire-resistant) wires for electrical devices is essential, and the use of non-combustible materials (semi-combustible materials) for each part is necessary to prevent fire. The risk must be eliminated through prevention and combustion expansion prevention devices.

Combat-armored vehicles were equipped with an automatic-fire-extinguishing system to ensure the safety of the crew and vehicle from fires on the vehicle. When a fire was occurred, the automatic-fire-extinguishing system automatically detects the fire through sensors and detection lines, sprays a fire extinguisher, and notifies the crew visually and audibly. Recently, there had been cases of automatic-fire-extinguishing systems malfunction on combat-armored vehicles. In this study, in order to resolve the automatic-fire-extinguisher's malfunction phenomenon, ground noise and inter-circuit noise generated from the fire detection line were identified, and the resistance connected on the circuit was revised to remove noise. As a result of resistance revision, the noises was eliminated and the electromotive force difference between input circuits was made constant, thereby improving the malfunction of the automatic-fire-extinguishing system. By applying the result, it was confirmed that the control device sensed a temperature similar to the actual temperature on actual vehicles, and it was confirmed that the automatic-fire-extinguishing system's malfunction phenomenon was not founded in the field vehicles after then.

한국교회는 한국사회에서 공적인 책임을 다하고 있는가? 한국교 회에 대한 다양한 지표들은 ‘아니다’라고 답을 하고 있다. 이런 상황에서 미로슬라브 볼프는 그 원인 중의 하나를 그리스도인 신앙 하강의 역기능 으로 지적하고 있다. 볼프는 하나님의 은혜를 경험한 사람들이 상승지 점에 고착되어 온전히 하강하지 않는다고 말한다. 그 결과 교회지도자 들의 잦은 일탈이 빛과 소금의 역할을 감당해야 하는 그리스도인의 본분을 퇴색시키고 있다. 이에 본 소고는 볼프의 책 『공적 신앙』(A Public Faith)에서 지적한 하강의 역기능을 전도학적인 관점으로 분석하였다. 첫째, 현재 실추된 한국교회의 윤리적 위상에 대한 근본적인 원인 중의 하나를 볼프가 말하는 하강의 역기능적 관점에서 제시하였다. 둘째, 볼프의 관점에서 하강의 역기능이 발생하는 원인을 지적하였다. 셋째, 그리스 도인들이 하강의 순기능을 회복할 수 있는 방안을 제시하였다. 하강의 역기능이 발생하는 원인으로는 세 가지 곧 하나님 말씀에 대한 축소주의(reductionism), 상승 지향적 고착된 신앙, 신앙이 하강 하지 않는 일방적 전도 커뮤니케이션을 들었다. 이에 대한 대안으로는 첫째, 리처드 피스(Richard Peace)가 제시한 바와 같이 전도를 영적 각성, 회심, 성화로 이어지는 과정으로 이해할 것을 제시하였다. 둘째, 폴 니터(Paul Knitter)가 제시한 바와 같이 전도의 실천에 있어서 수용 모델(acceptance model)을 제시하였다. 셋째, 존 웨슬리(John Wesley)의 사회적 성결을 모델로 제시하였다.