• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.23 no.6
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• pp.740-747
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• 2012

An Active Electronically Scanned Array(AESA) radar required necessarily as the Fire Control Radar(FCR) of recent fighters has ununiform detection range with regard to scan angle due to scan loss. Although the compensation method of scan loss in an AESA radar with variable dwell time is investigated, the effectiveness of the method in a fighter FCR with multi-function such as search, track, and missile guidance within limited resources should be considered systematically. In this paper, uniform search performance of an AESA radar using variable dwell time with regard to scan angle is derived. We assumed the search load of 50 % for case without changing dwell time in fixed frame time and showed the fighter FCR requirement for multi-function is not satisfied because the search load for the uniform search performance should be increased by about 100 %. On the other hand, in case of increasing the frame time for the uniform search performance and search load of 50 %, degradation of the search performance is shown by 86.7 % compared with the former. Based on these analyses, the effective beam operation strategy on an airborne AESA radar with uniform search performance in whole scan area is described with consideration of frame time, search load and performance as a whole.

• The Journal of the Korea Contents Association
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• v.21 no.10
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• pp.690-701
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• 2021

This study examines the effects of job stress on fire-fighters' job performance on negative job factors, job burnout, and positive job factors, job satisfaction, respectively, and by examining whether resilience has a modulating effect in these influence relationships. This was done to provide useful information for planning management strategies. The analysis was done by regression analysis of data collected through a structured survey of 239 fire-fighters, and the moderating effect was confirmed by calculating and applying the interaction term. For the analysis, a structured questionnaire survey was conducted on 239 fire-fighters. As a result of the analysis, it was confirmed that job stress and job burnout of fire-fighters were low, job satisfaction was normal, and resilience was above average. Also, there was no significant difference in resilience according to demographic characteristics, and it was found that job stress had a positive(+) influence on job burnout at a statistically meaningful level, and a negative(-) influence on job satisfaction. In addition, it was found that impulse control power and cause analysis power had a moderating effect in the influence relationship between job stress and job burnout, and impulse control power had a moderating effect in the influence relationship between job stress and job satisfaction. Based on these results, it was proposed to preemptively apply various resilience programs suitable for the situation of fire-fighters, enhance emotional competence, and introduce coaching personnel to help self-reflection.

• Journal of Korean Tunnelling and Underground Space Association
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• v.21 no.1
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• pp.167-175
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• 2019

To effectively deal with the fire in tunnel which is mostly the vehicle fire, it's more important to suppress the fire at early stage. In urban tunnel, however, accessibility to the scene of fire by the fire fighter is very limited due to severe traffic congestion which causes the difficulty with firefighting activity in timely manner and such a problem would be further worsened in underground road (double-deck tunnel) which has been increasingly extended and deepened. In preparation for the disaster in Korea, the range of life safety facilities for installation is defined based on category of the extension and fire protection referring to risk hazard index which is determined depending on tunnel length and conditions, and particularly to directly deal with the tunnel fire, fire extinguisher, indoor hydrant and sprinkler are designated as the mandatory facilities depending on category. But such fire extinguishing installations are found inappropriate functionally and technically and thus the measure to improve the system needs to be taken. Particularly in a double-deck tunnel which accommodates the traffic in both directions within a single tunnel of which section is divided by intermediate slab, the facility or the system which functions more rapidly and effectively is more than important. This study, thus, is intended to supplement the problems with existing tunnel life safety system (fire extinguishing) and develop the remote-controlled automatic fire extinguishing system which is optimized for a double-deck tunnel. Consequently, the system considering low floor height and extended length as well as indoor hydrant for a wide range of use have been developed together with the performance verification and the process for commercialization before applying to the tunnel is underway now.

• Anxiety and mood
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• v.6 no.1
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• pp.65-70
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• 2010

Objectives : Indirect contact with trauma may occur when a person empathically listens to detailed descriptions, exposing the person to intense emotional pain from trauma victims. Although less severe than direct trauma, indirectly traumatized persons may experience the same fear, rage, and despair as direct trauma victims. This phenomenon has been variously termed vicarious trauma, traumatic countertransference, burnout, compassion fatigue, and secondary traumatic stress. Using a psychiatric symptoms questionnaires, this study investigated the effects of indirect exposure to co-worker's trauma on the mental health of firefighters who had not directly experienced traumatic events in the previous year. Methods : We administered self-report questionnaires, such as the Impact of Event Scale-Revised (IESR) and Alcohol Use Disorder Identification Test (AUDIT), to firefighters working at two fire stations in a metropolitan city. We analyzed 188 of 232 collected surveys, after excluding falsely entered data (28 cases) and questionnaires by directly-traumatized victims (16 cases). Results : Alcohol consumption and posttraumatic stress disorder (PTSD) symptoms, as determined by the AUDIT and IES-R, were significantly higher in the indirectly-traumatized group. The ratio of high-risk members scoring higher than 23 in IES-R was larger in the indirectly traumatized group, although this was not statistically significant. Conclusion : Alcohol consumption was significantly higher in the indirectly traumatized group. This group also included more members at high risk for PTSD. Further research, with a larger group of indirectly traumatized firefighters and ongoing investigation of PTSD development and other psychiatric symptoms, is needed.

• Journal of the Society of Disaster Information
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• v.15 no.1
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• pp.76-83
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• 2019

Purpose: The purpose of this study is to present data of density and speed through the experiment of the counterflow by firefighter in corridor. Method: Experimental setup including a corridor in building was prepared for measuring data with 1.5m and 2m width. Normal flow and counterflow were created for each. Data were measured using camera and acquired by video image analysis. Results: The counterflow in corridor resulted in increasing average density of about $0.55P/m^2$ and decreasing average movement speed of about 0.61 m/s. These data measured during the time when the counterflow occurred. Conclusion: It was found that counterflow by firefighter in corridor momentary increasing the density and decreasing walking speed of evacuee. Further experiments of the counterflow effect in the total evacuation time are needed.

• Journal of People, Plants, and Environment
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• v.24 no.2
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• pp.137-152
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• 2021

Background and objective: This study was carried out to investigate and analyze the preference for plant fragrance and the psychological effects of a agro-healing activity in 101 firefighters aged 39.71 ± 10.94. Methods: For the psychological evaluation, post-traumatic stress symptoms, Korean occupational stress scale short form (KOSS-SF), emotional intelligence, and job satisfaction were surveyed on the Likert scale. For the preference for plant fragrances, 20 ㎕ of commercially available essential oils from four plant species (Mentha spp., Lavandula spp., Citrus limon, C. sinensis) were absorbed into each test paper and provided to the participants. Results: The rate of post-traumatic stress symptoms was high at 37.6% of the firefighters surveyed.. C. limon fragrance had the highest preference among the four plant fragrances, followed by C. sinensis > Mentha spp. > Lavandula spp. with statistically significant difference (F = 14.256, p < .001). The lower their age, income, and position, and higher the education level, the higher the preference for plant fragrances. And the administrative group had higher preference for plant fragrances than field group. In addition, as a result of examining the correlation between job satisfaction, preference for plant fragrance, post-traumatic stress, emotional intelligence, and job stress for fire-fighters, the higher the job satisfaction, the higher the fragrance preference and emotional intelligence, and the lower the post-traumatic stress and job stress. Conclusion: Therefore, installing a garden using botanical fragrances at workplaces that firefighters can easily access will improve job satisfaction and relieve stress. It can be concluded that applying the fragrance of plants to the healing farming activities at the fire-fighter's workplace can increase the usefulness of the healing activities.

• The Korean Journal of Emergency Medical Services
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• v.26 no.3
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• pp.121-135
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• 2022

Purpose: The purpose of this study was to develop a training protocol to standardize the management of mass casualties as part of the disaster response, and to verify the effectiveness of the training protocol. Methods: The study was conducted as a quasi-experimental study with a non-equivalent control group and pretest-posttest design. The protocol was divided into 5 parts, the first for the advance party, the second for the rescue team, the third for the paramedic team, the fourth for the ambulance team, and the fifth for the 119 EMS team. This study was conducted on November 15, 2021 and consisted of 21 subjects in the final experimental group and 23 subjects in the control group. In this study, the prior homogeneity test was analyzed using the χ²-test, intragroup comparisons were analyzed using the paired t-test, and intragroup comparisons were analyzed using the independent t-test. Results: The protocol was developed in five parts: advance party, rescue team, paramedics team, ambulance team, and 119 EMS team. In verifying the effectiveness of the protocol, it was found that there were significant differences in self-efficacy (t=-0.941, p=0.001) and self confidence within the group (t=-0.025, p=0.001) after the implementation of the mass casualty incident response training program. However, there was no significant difference between the experimental and control groups. Conclusion: Based on the findings of this study, it is believed that disaster response personnel can experience lower levels of anxiety and tension in disaster situations if they receive practical and realistic education and training. In the future, it is necessary to enhance protocol based practical education that can improve the knowledge and skills of each team and individual.

• The Korean Journal of Emergency Medical Services
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• v.17 no.3
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• pp.53-60
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• 2013

Purpose: The purpose of the study is to emphasize the importance of out-of-hospital cardiac arrest resuscitation. This resuscitation by paramedic is very effectively performed under the medical direction of the doctors. Methods: The cardiac arrest victim was 4 month old infant. Informed consent from the parents of the infant was received. CPR combined with 150J defibrillation was performed to the 4 month old infant. Results: We reported that the 4 month old infant survived the cardiac arrest. Out-of-hospital cardiac arrest infant survived after 150J automated external defibrillator and CPR performance. Conclusion: Specific operative protocol is important because the paramedic can apply the proper manual defibrillator effectively. It is important to extend the work scpoe of the EMT.

• Journal of Advanced Navigation Technology
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• v.15 no.4
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• pp.646-654
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• 2011

Recently, the task in which the number of people of the emergency medical technician whom it boards the ambulance is unreasonably insufficient and in which the fire fighter one person gets in the ambulance and which transfers the patient comes into question often. When the emergency patient is generated, it has to transfer to the special hospital in which above anything else, the measure which is quick and exact is needed and where there is the medical device which is suitable for particularly, the patient. This paper implementations the emergency medical system by the smart phone. The implemented system monitors the heart beat of the patient the monitoring among the patient transport with the real-time type. It can grasp the medical history information of the patient, and etc. in the past. And the system provides the emergency hospital which the patient requires and the pre-hospital phase provides the environment in which the disposition which is quick and efficient is possible to the emergency patient.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.22 no.4
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• pp.99-109
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• 2014

Airline and medical industry in Korea have rapidly grown since 21st century. However, air ambulance service using an aircraft has not as popular as in Japan, Europe or United States. Central government has decided to start emergency helicopter service since 2011 to transport emergency patients transported in the past by fire fighter helicopter. Unfortunately, 32 OECD countries out of 33 have operated emergency aircraft system except Korea. There are more than 25 emergency helicopters in Japan, which can operate within five minutes. Such system could save a lot of social direct or in-direct cost by saving valuable lives of Japan citizens. This paper has tried to research the perception of overseas Russian medical tourists on using Air ambulance for their medical tourism to Korea. Researching air ambulance, this paper expects to find ways to enhance both medical tourism industry and airline, business jet industry. According to research results, it was proven that tangibility of medical tourism service has a positive effect on the human factor of air ambulance. The human factor has also a significant impact on the passenger comfortableness of air ambulance. Such comfortableness increases the overall satisfaction of medical tourism.