보건교사의 응급의료체계 인식과 활용 실태

최욱진,Choi, Uk-Jin 사단법인 한국응급구조학회 2008 한국응급구조학회지 Vol.12 No.2

Purpose : This study aims to provide basic data to establish an effective emergency medical service system by analyzing health educator' understanding and use of emergency medical service system at schools. Method : 93 questionnaires from 200 elementary, middle and high school nurses in the city D were collected from May 26 to July 7, 2008 and ${\chi}^2$ analysis and frequency analysis were carried out with SPSS win PC 14.0. Results : 1. As for emergency contact points, 3(3.30%) answers 'they do not have any knowledge', 40(43.96%) said 'they have some idea' and 48(52.75%) said 'they do know about it'. Among 24 respondents who have less than five years of working experience, 2(8.33%), 16(66.67%) and 6(25.00%) answered 'have no knowledge', 'a little knowledge' and 'clear knowledge on it' respectively. As for 9 who have 6-10 years of career, 1(12.50%), 4(50.00%) and 3(37.50%) answered 'have no knowledge', 'a little knowledge' and 'clear knowledge on it' respectively. Among 32 respondents who have 11~20 years, there were no respondents with no knowledge on the given question, and 9(29.03%) said they have some understanding and 22(70.97%) answered they have clear understanding on the topic. From this result, it can be said that there is statistically meaningful differences among different working year groups with ${\chi}^2=16.583$ and p= .010. 2. As for 119 emergency contact in the given district, 24(29.63%), 30(37.04%) and 27 (33.33%) answered 'do not know', 'know' and 'know very well' respectively. As for the question to ask whether they know Emergency Medical Information Center 1339, 66(70.97%) answered 'Yes' and 27(29.03%) answered 'No'. When it comes to emergency contact numbers and list of hospitals, 59(63.44%) said 'they have some list', 20(21.51%) answered 'they have well established contact network' and 14(15.05%) said 'they have none'. 3. As for the use of 119 service at the time of emergency at schools, 59(63.44%), said 'Yes' and 12(12.90%) answered 'No'. Among those who said 'yes', 29(31.18%), 24(25.81%) and 5(5.38%) answered they have used the service 1-2, 3-5 and 6-10 times respectively. Conclusion : In order to ensure health educator to effectively deal with emergency situations at schools, there should be special activities to enhance health educator' understanding on 119 and Emergency Medical Information Center 1339 and at the same time, a system should be established to connect schools, 119 in a given district, hospitals and Emergency Medical Information Center 1339.

KR60 레일의 미세조직과 기계적 물성 평가

최욱진,조희재,윤경민,민경환,임남형,이수열,Choi, Wookjin,Cho, Hui Jae,Yun, Kyung-Min,Min, Kyung-Hwan,Lim, Nam-Hyoung,Lee, Soo Yeol 한국재료학회 2017 한국재료학회지 Vol.27 No.12

The use of continuous welded rail is increasing because of its many advantages, including vibration reduction, enhanced driving stability, and maintenance cost savings. In this work, two different types of continuous welded rails were examined to determine the influence of repeated wheel-rail contact on the crystal structure, microstructure and mechanical properties of the rails. The crystal structure was determined by x-ray diffraction, and the microstructure was examined using optical microscopy and scanning electron microscopy. Tensile and microhardness tests were conducted to examine the mechanical behaviors of prepared specimens taken from different positions in the cross section of both newly manufactured rail and worn rail. Analysis revealed that both the new and worn rail had a mixed microstructure consisting of ferrite and pearlite. The specimens from the top position of each rail exhibited decreased lamella spacing of the pearlite and increased yield strength, ultimate tensile strength and hardness, as compared with those from other positions of the rail. It is thought that the enhanced mechanical property on the top position of the worn rail might be explained by a mixed effect resulting from a directional microstructure, the decreased lamella spacing of pearlite, and work hardening by the repeated wheel-rail contact stress.

흉부압박의 횟수증가가 구조자에게 미치는 생리학적 변화와 심폐소생술 정확도에 미치는 영향

최욱진,Choi, Uk-Jin 사단법인 한국응급구조학회 2008 한국응급구조학회지 Vol.12 No.3

Purpose : This study was designed to examine physiological changes in the body of rescuers conduct CPR according to the 2005 new guideline from American Heart Association. The ratio of artificial respiration has changed from 15 : 2 into 30 : 2 in 2005. The researcher tried to know the correlation between the physiological changes and the accuracy of CPR. Method : The examinees of this study were 26 students (Dept. of Emergency Medical Service). After the training, participants conducted 10 minute CPR and soon after the CPR, their vital signs were checked, and lactic acid and concentration of ammonia were analysed from their blood samples. Questionnaires to ask their subjective fatigue level were filled out after blood samples and 10 minute - CPR was performed. Results : 1) After the CPR, concentrations of ammonia were $149.71{\mu}{\ell}/d{\ell}$ and $162.17{\mu}{\ell}/d{\ell}$ in 15 : 2 and 30 : 2, respectively. The number was higher in 30 : 2 but it wan not statistically meaningful (p = .493). Log value of lactic acid was a little higher in 30 : 2 with 42 log($mmol/{\ell}$) and 54 log($mmol/{\ell}$) in 15 : 2 and 30 : 2, respectively but it was not statistically meaningful (p = .113). 2) Blood pressure in 15 : 2 and 30 : 2 were 118.50 mmHg and 125.08 mmHg while pulse in two different cases were 96.14 and 97.25, showing no statistically significant differences (blood pressure : p = .155, pulse : p = .841). 3) Subjective fatigue was a bit high in 30 : 2 with 5.93 and 6.92 points in 15 : 2 and 30 : 2 respectively but it was not statistically meaningful (p = .142). 4) In the 10 minute CPR, respiration accuracy was 96.21% in 15 : 2 and 94.79% in 30 : 2. There was no statistical significances between the two(p = .225). In the meanwhile, chest compression accuracy was 92.57% in 15 : 2 and 91.83% in 30 : 2. From the beginning to the end of chest compression, there showed no difference(p = .425). the type of CPR did not influence upon the accuracy of chest compression(p = .756). Conclusion : In the CPR conducted by skilled rescuers for 10 minutes, there were no statistically meaningful differences between 15 : 2 and 30 : 2 in the concentration of fatigue element in a blood, subjective fatigue, vital signs and accuracy of CPR. Therefore, 30 : 2 CPR recommended by American Heart Association need to be recommended and performed in scene size up.

삼차원 공간 복잡도가 감소된 삼차원 형상 복원 알고리즘

최욱진(Wook-Jin Choi),만난 사에드 무하마드(Mannan S. M),최태선(Tae-Sun Choi) 한국정보기술학회 2008 한국정보기술학회논문지 Vol.6 No.4

Insight Toolkit 기반 흉부 CT에서의 폐결절 검출 시스템

최욱진(Wook-Jin Choi),최태선(Tae-Sun Choi) 한국정보기술학회 2014 Proceedings of KIIT Conference Vol.2014 No.5

본 논문에서는 폐 결절 자동 검출을 위한 CAD시스템을 제안하였다. 제안된 시스템은 Insight Toolkit(ITK)을 이용하여 구현되었으며 폐 결절을 검출하기 위해 폐 영역을 분할하고 분할된 폐 영역에서 폐 결절 후 보를 검출 후 각각의 폐 결절 후보에 대하여 2D 및 3D 기반 특징값을 추출한다. 추출된 특징값들은 기반 폐결절 검출기를 이용하여 폐결절과 비결절로 구분한다. 제안된 ITK를 이용한 폐결절 검출 CAD시스템은 흉부 CT영상을 효율적으로 처리하여 폐 영역을 분할하고 분할된 폐 영역에서 폐결절을 정확하게 검출 하였다. This paper presents a computer aided detection (CAD) system for pulmonary nodule detection that implemented by Insight Toolkit. Lung volume is extracted from CT image sequence using thresholding and connected component labeling. In the extracted lung volume, nodule candidates are detected using adaptive multiple thresholding and rule based classifier. After that, we extract the 3D and 2D features from nodule candidates. The nodule candidates are then classified using Support Vector Machine (SVM) based classifier.

라틴아메리카에서 삼림 파괴 결정 요인: 부패요인을 중심으로

최욱진 ( Wook Jin Choi ),권기수 ( Kisu Kwon ) 한국포르투갈-브라질학회 2021 포르투갈-브라질 연구 Vol.18 No.2

기후변화가 세계적인 이슈로 부각되면서 기후변화를 촉발하는 주범인 삼림 파괴에 관한 관심도 뜨겁다. 그러나 이러한 높은 관심에도 불구하고 삼림 파괴에 영향을 미치는 제도적 요인에 관한 실증적인 연구는 매우 미흡한 실정이다. 이러한 문제의식을 바탕으로 본 연구에서는 대표적인 생물자원의 보고이며 무분별한 삼림 파괴로 골머리를 앓고 있는 라틴아메리카를 분석대상으로 객관적인 데이터를 사용해 삼림 파괴에 영향을 미치는 제도적 요인을 분석하였다. 본 연구에서는 특히 라틴아메리카 20개국을 대상으로 부패가 삼림 파괴에 영향을 미치는지를 실증분석을 통해 규명하였다. 실증분석 결과, OLS와 고정효과 모델 모두에서 부패의 통제 수준이 엄격해 질수록, 부패의 인식 수준이 높을수록 삼림 파괴가 감소하는 것으로 입증되었다. 또한 본 연구에서는 경제성장에 따른 소득 증대, 도시화의 확대가 삼림 파괴의 또 다른 중요한 요인이라는 점을 확인하였다. 본 연구 결과는 경제성장과 도시화로 삼림 파괴가 불가피하기는 하지만 부패 축소를 통해 삼림 파괴 속도를 지연시킬 수 있다는 정책적 시사점을 제공한다. As climate change emerges as a global issue, interest in deforestation, the main culprit of climate change, is also hot. However, the empirical studies on the institutional factors affecting the deforestation are very insufficient. Against this background, this study investigated whether corruption, one of the representative institutional factors, affects deforestation in Latin America through empirical analysis. As a result of empirical analysis, it was proved that deforestation decreased with higher level of control of corruption and higher level of perception of corruption in both OLS and fixed-effect models. In addition, in this study, it was confirmed that the increase of income(GDP) and the expansion of urbanization driven by economic growth are other important factors of deforestation. The results of this study provide policy implications that deforestation is inevitable due to economic growth and urbanization, but the rate of deforestation can be suppressed by reducing corruption.

논문 : 東城王(牟大) 卽位 過程 檢討

최욱진 ( Wuck Jin Choi ) 한국고대학회 2014 先史와 古代 Vol.41 No.-

백제는 갑작스러운 고구려의 침입에 의해 개로왕이 패사하고 한성이 함락되면서 웅진으로 천도하였다. 천도는 어느 특정세력의 주도하에 이루어지지 못하였고 이로 인해 천도 이후의 정국은 다양한 세력들 간의 이해관계 속에 혼란스러웠다. 천도 이후 가장 먼저 두각을 나타낸것은 해구였다. 해구는 다른 세력과의 연합을 통해 문주왕을 위협하였고 문주왕은 귀국한 곤지와 더불어 이에 대응하였다. 하지만 정쟁과정에서 곤지는 죽임을 당하였고 문주왕 역시시해되고 말았다. 해구를 중심으로 한 연합세력은 정쟁에서 승리한 이후 문주왕을 대신하여 삼근왕을 옹립하고 정국운영의 주도권을 장악하였다. 하지만 사마를 중심으로 한 곤지계와 삼근을 중심으로 한 문주계 그리고 진씨세력 등 반 해구세력과의 새로운 정쟁에서 패하게 되면서 결국 죽음을 당하게 되었다. 반 해구세력은 해구를 중심으로 한 연합세력의 해체 이후 왕권을 놓고 다툼을 벌이게 되었고 결과적으로 삼근왕을 중심으로 한 문주계가 패배하게 되었다. 문주계의 제압 이후 왕권을 놓고 사마와 더불어 왜국에서 백제로 들어온 모대간의 다툼은 진씨를 비롯한 다른 세력들이 자신들의 이익을 위하여 모대를 지지함으로써 결국 웅진천도 이후의 정쟁은 문주계에서 곤지계로의 왕계변화와 더불어 모대가 동성왕에 즉위하면서 일단락 되게 되었다. The capital of Baekje has transferred to Woongjin due to the death of King Gaero from the sudden invasion of Goguryeo. The transfer of the capital has not completed and leaded by a specific power and that brings disorders due to the interest between different powers in the political situation after the transfer of the capital. The most brilliant figure in the situation is Haegu. Haegu threats King Munju through the confederacy with other powers and King Munju reacts to the threat together with Gonji. However, Gonji has killed during their political strife and King Munju has also killed. The united front centered by Haegu has achieved a victory in the political strife and support King Samgeun replacing King Junju. Also, they hold the hegemony in controlling the political situation. However, Haegu has killed from the defeat in new political struggles against the opposition power of the Gonji power centered by Sama, the Munju power centered by Samgeun, and the Jin family. The opposition power of Haegu has struggled for holding the royal prerogative after dismantling the united front and that leads to the defeat of the Munju power centered by King Samgeun. In the struggle between Modaes, which have returned from Japan with Sama, for holding the royal prerogative, different powers including the Jin family support Modae for their interests. Then, the political strife after the Woongjin transfer has finished by the enthronement of Modae as King Dongseong together with changes in a royal power from Munju to Gonji.

LTS와 LMA를 이용한 병원 전 전문 기도 관리 연구

최욱진(Choi, Uk-Jin),심규식(Shim, Gyu-Sik) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.12

심정지 또는 중증 외상 환자의 신속한 기도유지는 매우 중요하다. 본 연구의 목적은 후두튜브(LTS)와 후두 마스크(PLMA)의 삽관 속도, 성공률, 교육 전·후 자신감 변화를 비교하여 병원 전 단계의 주축을 담당하고 있는 119 구급대의 전문기도관리 능력을 향상 시키는데 있다. 연구 대상자는 119구급대원 중 1급 응급구조사 60명(LTS군 30명, PLMA군 30명)이며 마네킹을 대상으로 5분간 3회 실습 후 삽관 소요시간과 성공 여부, 자신감 변화를 측정하였다. 연구결과 LTS와 PLMA를 이용한 삽관 시간은 유의한 차이를 보였고(p=.000), 성공률은 유의한 차이가 없으며, 실험 후 자신감은 유의하게 상승하였다(p=.000). 결론적으로 경추가 고정되고 혀 부종이 있는 외상환자에게 신속한 삽관이 필요한 경우 LTS 사용이 효과적이며 교육을 통하여 전문기도관리 능력을 향상시킬 수 있을 것으로 사료된다. It is very critical to promptly maintain airway of cardiac arrest cases or serious traumatic cases. The purpose of this study is to compare intubation rate, successful rate and pre-/post-education self-confidence between laryngeal tube (LTS) and proseal laryngeal mask (PLMA), so that it may contribute to improving the ability of 119 emergency team - a pivotal role in pre-hospitalization process - to carry out advanced airway management. In order to achieve the purpose, total 60 paramedics (Class Ⅰ) who worked for incumbent 119 emergency team were asked to join a practical experiment and were also divided into two groups (LTS group: 30 people, PLMA group: 30 people). In details, they were all asked to take 3 sessions of practice (5 minutes per session) using dummy model to quantitatively measure the time and success/failure of intubation and the change of their self-confidence. As a result, it was found that there were statistically significant differences in the time of intubation between LTS and PLMA group (p=.000), but there was no significant difference in the rate of successful intubation between these two groups, and self-confidence of two groups tended to significantly increase after experiment (p=.000). Conclusively, if it is necessary to promptly apply intubation to traumatic cases with immobilized cervical vertebral and lingual edema, LTS can be useful as an effective means of intubation. And it is expected that continuing intubation training using LTS will improve the ability of emergency team to perform advanced airway management for traumatic cases.

미세조류를 이용한 영양염류 제거에 있어서 휴믹산 (색도)가 미치는 영향에 대한 연구

최욱진(Choi, Wook Jin),박준홍(Park, Joon Hong),송경근(Song, Kyung Guen) 대한토목학회 2017 대한토목학회 학술대회 Vol.2017 No.10

흉부 CT영상에서 계층적 삼차원 블록 분석을 이용한 폐결절 검출

최욱진(Choi, Wook-Jin),최태선(Choi, Tae-Sun) 한국정보전자통신기술학회 2012 한국정보전자통신기술학회논문지 Vol.5 No.1

본 논문에서는 계층적 삼차원 블록 영상분석을 이용한 폐결절 자동 검출 방법을 제안한다. 제안하는 블록 기반 폐 영상 분석 방법은 크게 두 부분으로 나눌 수 있다. 첫 번째는 블록을 분할하고 분석하고자 하는 대상 블록을 선택하는 과정이며 두 번째는 선택된 분석 대상 블록을 분석하는 과정이다. 첫 번째 과정을 통하여 선택된 분석대상 블록들은 다음 단계인 분석과정을 통해 결절과 비결절로 분리될 수 있다. 분석대상 블록의 중심에 있는 object에서 분석을 위한 형태 특징을 추출 하고, 추출된 형태 특징 값을 Support Vector Machine을 이용하여 결절과 비 결절로 분리한다. In this paper, we propose the pulmonary nodule detection method based on hierarchical 3D block analysis. The proposed system consists of two main part. In the first part, we select the block which is need to analysis. In the second part, we analysis the selected blocks. We extract the shape based features of the object in the selected blocks. Support Vector Machine is applied to the extracted features to classify into nodules and non-nodules.