• Journal of the Korea Society of Computer and Information
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• v.27 no.8
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• pp.195-202
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• 2022

In this study, when cardiopulmonary resuscitation continued for a long time, the rescuer's blood lactic acid concentration, heart rate, and rating of perceived exertion were measured to identify the change in the rescuer's fatigue. Data collection was conducted from July 5 to July 9, 2021, with a total of 24 students, 12 students department of special warfare medical non-commissioned officer, and 12 students department of emergency medical technology at D University, undergoing a two-person alternative chest compression resuscitation for 60 minutes. As a result of the study, the rescuer's blood lactic acid concentration, heart rate, rating of perceived exertion, and chest compression speed were significantly changed according to the duration of CPR (p<.001, p<.001, p<.001, p<.001). blood lactic acid concentrations at every measurement cycle (30 minutes, 40 minutes, 50 minutes, 60 minutes) showed a significant positive correlation with heart rate (r=.696, p<.001, r=.672, p<.001, r=.709, p<.001, r=.782, p<.001), there was also a significant positive correlation with the rating of perceived exertion (r=.476, p<).05, r=.426, p<.05, r=.470, p<.05, r=.470, p<.05). Therefore, monitoring the fatigue of rescuers using heart rate and rating of perceived exertion will be useful for maintaining high-quality chest compression in situations where cardiopulmonary resuscitation is required for a long time.

• Journal of the Korean Society of Radiology
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• v.16 no.4
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• pp.463-470
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• 2022

The purpose of this study was to investigate the perception of Air Force human resources (Civilian defense manpower, Officer, Noncommissioned officer, Solder) for the radiation perception. The subjects were 259 men and women who visited at the Aerospace Medical Center. As for the method, a survey study was conducted using a questionnaire with a total of 14 questions about radiation perception (risk, benefit, management). For statistical analysis, an independent sample T-test and one-way analysis of variance (ANOVA) were used to compare the average of confirm a significant difference among groups. The correlations between variables were tested with Pearson and Spearman correlation coefficients. As a result, in the air force human resources, perception of radiation risk of females had a significantly higher awareness than male. Radiation benefits had a significantly higher awareness among married people, military officers, officers, and non-commissioned officers. Radiation control was significantly higher in men, married men, and those with more than 16 years of military experience.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.4
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• pp.2320-2323
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• 2014

Piezoelectric inverter for driving CCFL is designed in this study. Of them, CCFL is generally used because it has advantages such as small size, high efficiency and good brightness characteristics. the description of the piezoelectric effect is not present here and can be easily found in numerous publications as well as complex equations and formulae. What is the most important to understand is that "they are different" one cannot just change an electromagnetic transformer(EMT) for a piezoelectric one. The simulation program supports the modeled piezoelectric inverter for this paper and the equivalent circuit. The result of the experiment shows more than 90% improvement in terms of the efficiency.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.11
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• pp.5512-5517
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• 2012

In this paper we suggest multimedia synchronization model that is based on the Petri-net and services desirable quality of service requirement. Proposed model applies variable buffer which can be allowed, and then it presents high quality of service and real time characteristics. This paper decreases the data loss resulted from variation of delay time and from loss time of media-data by means of applying delay jitter in order to deal with synchronization interval adjustment. Plus, the mechanism adaptively manages the waiting time of smoothing buffer, which leads to minimize the gap from the variation of delay time. The proposed paper is suitable to the system which requires the guarantee of high quality of service and mechanism improves quality of services such as decrease of loss rate, increase of playout rate.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2291-2293
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• 2011

In this paper, the composes with digital position with a computer logical operation order with the signal processing method which is pliability and result of the logical operation which confronts in input signal from the outside input-output Channel leads and about the drive which the possibility to output at the outside is a research. This Decoder IC Multiplexer & De-multiplexer, position the function with from the digital signal circle where the imagination embodiments and BIT outputs of IC etc. are possible is possible in basic and usefully from the general industrial, could be used.

• The Korean Journal of Emergency Medical Services
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• v.18 no.2
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• pp.21-33
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• 2014

Purpose: A descriptive study design was used to investigate infection management awareness and infection management performance for clothing management in 119 emergency medical technicians (EMTs). Method: 188 paramedics and basic EMTs completed questionnaires between March 1 and April 30, 2013 in Jeollabuk-do. Results: Participants' average score for infection control awareness was 2.69 and that for performance was 1.58, with the differences being statistically significant (t = 931.455, p = .003). Participants' general characteristics resulted in differences in infection management performance. Women (1.63) have scored higher than men (1.28), and the difference was statistically significant (t = 11.174, p = .001). Participants who had clinical experience (1.63) had higher scores than participants who did have clinical experience before (1.53) and, again, the difference was significant (t = 7.167, p = .009). Conclusion: Education program for infection management is need to be developed for more effective infection management.

• The Korean Journal of Emergency Medical Services
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• v.23 no.3
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• pp.135-143
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• 2019

Purpose: The purpose of this study was to determine the effect of a violent experience and job stress on burnout and to investigate the factors that affect burnout in female 119 emergency medical technicians. Methods: Data from 189 female EMTs were collected using a structured questionnaire. The data were analyzed using SPSS 23.0. The analyses included descriptive statistics, independent t-tests, analysis of variance, Scheffe test, Pearson's correlation coefficient, and multiple linear regression. Results: Burnout was positively correlated with a violent experience in female 119 EMTs. Violent experience (β=.39, p<.001) were a significant predictor of burnout in 15.2% of female 119 EMTs. Conclusion: A violent experience is identified as a significant factor affecting burnout in female 119 EMTs. Therefore, it is necessary to impart education to female 119 EMTs on effectively coping with violence.

• The Korean Journal of Emergency Medical Services
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• v.24 no.2
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• pp.123-131
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• 2020

Purpose: This study aimed to find out the effectiveness of gum elastic bougies for intubation in comparison to stylet according to airway type using a manikin. Methods: The study subjects were 52 paramedic students who intubated using a Macintosh laryngoscope and compared stylet and gum elastic bougie use in a 7.5 mmID endotracheal tube, on a manikin with either normal or difficult airway. Difficult airway was made Philadelphia neck collar. Collected data included intubation time, accuracy and ease of intubation, later analyzed by frequency analysis, descriptive analysis, independent t-test, chi square test, paired t-test, and McNemar test using SPSS Statistics 18.0. Results: There was a significant difference in intubation time according to intubation device and airway type (p=.000). There was no significant difference in accuracy of intubation according to intubation device or airway type (normal airway p=1.000, difficult airway p=.052). There was a significant difference in ease of intubation scale according to intubation device and airway type (p=.000, p=.000). Conclusion: Based on the speed and ease of intubation, gum elastic bougie is recommended for intubation in patients with difficult airways such as those with cervical injury.

• The Korean Journal of Emergency Medical Services
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• v.18 no.1
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• pp.43-54
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• 2014

Purpose : The purpose of this study was to provide appropriate direction for triage education by investigating the knowledge level of triage in 119 EMTs before and after the triage education. Methods : The questionnaire was filled out by newly assigned 33 EMTs in the fire service academy in I metropolitan city from November 1, 2013. The data were analyzed using SPSS WIN 21.0 program. Results : The lowest knowledge level by 119 triage was the potential emergency related question, but that by case-based triage was the semi-emergency related questions. The knowledge score by case-based triage before education was 51.14 points. This was lower than knowledge score by 119 triage, that is, 75.70 points. After education, the knowledge level by 119 triage was significantly improved(p =.000). However, there was no significant difference in the knowledge level by case-based triage(p =.236). Conclusion : It is necessary to provide systematic and periodic education and training for 119 EMTs toward triage to improve triage accuracy and efficient circulation of the emergency medical service system. Especially, it is very important to provide case-based triage education for field application.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.17 no.4
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• pp.47-52
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• 2007

In this paper, we proposed a constrution that creates Dynamic Pipe Hash Function with a pipe hash function. To increase security lever, dynamic hash function take and additional compression function. Proposed hash function based on the piped hash function. Our proposed Dynamic Pipe Hash Function is as secure against multicollision attack as an ideal hash function. And it have advantage for a number of reasons because of variable digest size. For example, in digital signature protocol, If a user requires increased security by selecting a large key size, useing a dynamic hash function in a protocol make implementation much easier when it is mandated that the size of the digest by increased.