외상 중환자의 예후 예측을 위한 TRISS, APACHE II, SAPS II의 비교

조광원,황성연,홍은석 대한응급의학회 2002 대한응급의학회지 Vol.13 No.4

765 KV 送電線路의 導體表面 電界에 따른 코로나 騷音 特性에 관한 硏究

趙光元,朴允錫 大田産業大學校 2000 한밭대학교 논문집 Vol.17 No.1

In order to select an optimal conductor for 765 kv transmission line, the conductor should be satisfied with the design criteria of electrical environmental factors which are resulted from corona. An environmental countermeasure of corona problem uses an thick conuctor or multi-conductor method which reduce corona to the minimum by decreasing of the electric surface gradients. Because KEPCO 765kv line in the world, the characteristics of corona has been studied extensively using corona cage. Corona noise of transmission line is effected by the surface gradient of conductor, and the lower sub-conductors have higher surface gradient due to the lower sub-conductors have more rain drops than the upper sub-conductor. Therefore this paper suggests a new surface decreasing method which is using two-kinds sub-conductors in one bundle. It is shown that this method is a better solution for reducing audile noise than either the conventional bundle or the asymmetric bundle proposed by EPRI using the simulation test of corona cage.

외상 중환자의 예후 예측을 위한 TRISS, APACHE Ⅱ, SAPS Ⅱ의 비교

조광원,황성연,홍은석 대한응급의학회 2002 대한응급의학회지 Vol.13 No.4

Purpose: Several statistical models, such as the TRISS, the APACHE Ⅱ and the SAPS Ⅱ scoring systems, have been utilized over the recent decades to accurately predict outcomes in Intensive Care Unit (ICU) trauma patients. This study was performed to evaluate the ability of these three statistical models to predict hospital mortality and to compare the performance of these three statistical models in ICU trauma patients. Methods: Seven hundred forty-seven trauma patients were admitted to the ICU via the emergency center, Masan Samsung Hospital, from March 1999 to February 2001. Of them, 684 patients were included in this study, and their medical records were retrospectively analyzed. The probability of death was calculated for each patient based on the TRISS, the APACHE Ⅱ, and the SAPS Ⅱ equations. Results: The values of the Hosmer and Lemeshow X2 for TRISS, APACHE Ⅱ, and SAPS Ⅱ were 41.32, 43.03, and 17.64, respectively, and all of them underestimated mortality (p<0.05). For two-by-two decision matrices with a decision criterion of 0.5, the specificities and percentages correctly classified of APACHE Ⅱ and SAPS Ⅱ were higher than those of TRISS (p<0.001). For the ROC curve analysis, the areas under the curves (±SEM) of TRISS, APACHE Ⅱ, and SAPS Ⅱ were 0.922±0.011, 0.951±0.011, and 0.957±0.009, respectively (95% confidence interval). The areas under the curves of APACHE Ⅱ and SAPS Ⅱ were larger than that of TRISS (p<0.05 and p<0.01, respectively). Conclusion: All of these three statistical models had good discriminative power, with APACHE Ⅱ and SAPS Ⅱ performing better than TRISS. However, all of them showed poor calibration and underestimated mortality. The authors conclude that a new statistical model is needed to accurately predict hospital mortality in severely injured patients.

공동체의식 교육을 위한 공동체의식의 개념과 구성요소적 특성

조광원 한국인격교육학회 2023 인격교육 Vol.17 No.1

In modern society, the absence of community consciousness is getting worse, causing many social problems such as extreme materialism and the dissolution of the community. This suggests that educational supplementation that can cultivate community consciousness is necessary to overcome social confusion and moral problem situations. However, prior to the study of community consciousness education, it is recognized that the concepts of community consciousness are diverse and that the study of the concepts and characteristics of community consciousness to be reflected in community consciousness education is needed first. Therefore, this study aims to synthesize and define various concepts of community consciousness for community consciousness education and, based on this, to present component characteristics. 현대 사회에서 공동체의식의 부재는 갈수록 심해지고 있으며, 극단적 물질주의, 공동체의 해체 등 많은 사회적 문제들을 야기하고 있다. 이는 사회적 혼란과 도덕적 문제 상황을 극복하기 위해 공동체의식을 함양할 수 있는 교육적 보완이 필요하다는 점을 시사한다. 그러나, 공동체의식 교육 연구에 앞서 공동체의식의 개념이 다양하여 공동체의식 교육에 반영할 공동체의식의 개념과 특성에 대한 연구가 우선적으로 필요하다. 따라서 본 연구에서는 공동체의식 교육을 위해 공동체의식에 대한 다양한 개념을 종합하여 정의하고, 이에 기반한 구성요소적 특성을 제시하고자 한다.

The Investigation of Microwave irradiation on Solution-deposited Aluminum-Oxide

조광원,조원주,임철민 한국진공학회 2015 한국진공학회 학술발표회초록집 Vol.2015 No.2

외상환자의 중증도분류를 위한 Triage Score와 Triage-Revised Trauma Score의 비교

조광원,황성연,배성만 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Background: The triage-revised trauma score(t-RTS) is used for triage in trauma patients in many countries. Recently, the triage score was developed as a new triage method for trauma patients in Korea. The objective of this study was to assess the accuracy of triage for the t-RTS and the triage score. Methods: The medical records of 1575 consecutive trauma patients visiting the Emergency Center, Masan Samsung Hospital, from March to August 1999 were retrospectively analyzed. The triage score and the t-RTS were taken from the charts completed by the emrgency room doctors and nurses. The accuracies of the two triage methods were compared by using the undertriage and the overtriage rates, receiver operating characteristic(ROC) curve analysis, and a correlation analysis with many physiologic, anatomical, biochemical, and mixed scores(Glasgow coma scale, injury severity score, TRISS, APACHE II and III scores, operation, survival, etc.). Results: The undertriage rates for the triage score and the t-RTS were 22.8% and 38.2%, respectively(p≤0.001), the overtriage rates were 6.3% and 3.1%, respectively,(p≤0.001), and the accurate triage rates were 91.3% and 91.7%, respectively. The areas under ROC curves for the triage score and the t-RTS were 0.871±0.033 and 0.800±0.039, respectively(95% confidence interval, p<0.001). In general, the correlations of the two triage methods with many physiologic, anatomical, biochemical, and mixed scores were moderately high, but there were no statistical differences between the correlation coefficients of the two triage methods for those scores. Conclusion: The triage score was equal or superior to the t-RTS for triage in trauma patients. The former was simpler and could be used easily by emergency medical personnel. Therefore, the authors conclude that the triage score can be used instead of the t-RTS for triage in trauma patients.

Study of Treatment Methods on Solution-Processed ZnSnO Thin-Film Transistors for Resolving Aging Dynamics

조광원,백일진,조원주 한국진공학회 2014 한국진공학회 학술발표회초록집 Vol.2014 No.2

Microwave Annealing을 이용한 MOS Capacitor의 특성 개선

조광원,조원주 한국진공학회 2013 한국진공학회 학술발표회초록집 Vol.2013 No.8

A case of complement-mediated TMA with the CFHR3/CFHR1 deletion

조광원,박준홍,조용곤,임호영,강경표 대한내과학회 2021 대한내과학회 추계학술대회 Vol.2021 No.1

앵글 조립 트러스 합성보의 전단성능 평가

조광원,박홍근,이호준,최인락 한국강구조학회 2019 韓國鋼構造學會 論文集 Vol.31 No.2

In this study, shear strength of composite beams using precast concrete and steel angle trusses was investigated. To verify the shear strength, angle truss composite beams and ordinary reinforced concrete beams were tested under four-points loading. The test variables were the use of precast concrete, angle truss, and shear reinforcement. The test shear strength was higher than that of the current design code due to the contribution of web steel members. A modification of current design equation was proposed to enhance the accuracy of the strength prediction. The test results showed that shear splitting failure occurred at the interface between the concrete and the steel angle in the compression zone. Thus, the interface strength should be carefully considered on the design. 본 연구에서는 하부 프리캐스트 콘크리트와 강재 앵글트러스를 사용한 앵글 조립 트러스 합성보의 전단성능를 연구하였다. 앵글 조립 트러스 합성보와 철근콘크리트보 실험체를 제작하여 4점 단조가력을 실시하였다. 실험변수는 콘크리트 분리타설, 앵글트러스 유무, 전단철근 유무이다. 앵글트러스의 복부재의 인장으로 현행 기준의 강도값보다 높은 실험결과를 보였다. 이에 콘크리트와전단철근에 강재의 기여를 더하는 새로운 제안식을 제시하였고, 실험결과를 합리적으로 평가한다. 또한 압축대의 콘크리트와 강재의계면에서 전단쪼개짐이 발생 및 관측되었고, 이는 설계시 충분히 고려가 필요하다.