동기 리럭턴스 전동기의 립 구조 최적화 설계

심민섭(Min-Seob Sim),노종석(Jong-Suk Ro) 대한전자공학회 2019 대한전자공학회 학술대회 Vol.2019 No.6

함정 소나체계 능동음향 탐지성능에 대한 평가 표준화 연구

심민섭(Min-Seop Sim),황지환(Ji-Hwan Hwang),정현섭(Hyeon-Seob Jeong) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.10

본 연구에서는 함정 소나체계의 능동음향 탐지성능에 대한 평가 표준화 연구를 수행하였다. 함정의 소나체계는 대표적 수중 탐색체계로 함정의 전투성능, 운용성, 생존성에 중요한 역할을 수행한다. 현대 과학기술의 발달에 따라 잠수함 추진체계의 은밀성이 강화됨에 따라 능동소나를 이용한 수중표적 탐색 및 식별의 중요성이 커지고 있다. 따라서, 신조함정 소나체계에 대한 객관적이고 정확한 성능평가를 통해 탐지성능을 확인하고 전력화하여야 한다. 능동음향 탐지성능은 능동신호의 음원준위, 중심주파수, 음원수심과 음파의 전달손실 등에 의해 결정된다. 하지만, 탐지성능 평가방법에서는 계절별 수온구조에 따라 탐지거리의 변동성을 반영하지 않고 획일화된 요구성능 만족여부를 평가하고 있다. 본 연구에서는 객관적이고 정확한 탐지성능 평가기준을 위해 소나방정식과 BELLHOP 음선모델을 이용하여 소나체계의 계절별 탐지거리를 추정하였다. 우리나라 동해해역의 여름 및 겨울철 수온구조에서 함정 소나체계 능동신호의 전달손실과 신호이득을 추정하였고 계절별 탐지거리 기준을 확인하였다. A naval ship sonar system is a representative underwater search system and plays an important role in ship combat performance, operability, and survivability. As the stealth of the submarine propulsion system is strengthened with the development of modern science and technology, the importance of underwater target search and identification using active sonar increases. It is necessary to check the detection performance through an objective and accurate performance evaluation of the sonar system before deployment. Active sonar detection performance is determined by the sound source level, center-frequency, sound source depth, and transmission loss of the active signal. However, the detection performance evaluation does not reflect the variability of the detection distance according to the seasonal sea temperature profile but evaluates whether the required performance is satisfied. In this study, the seasonal detection range of the sonar system was estimated using the sonar equation and the BELLHOP model for objective and accurate detection performance evaluation criteria. The transmission loss and signal excess of the active sonar was estimated in the summer and winter temperature profile of the East Sea of Korea, and the detection range criteria for each season were confirmed.

'퇴원설명문'에 의한 72시간내 부적절한 응급센터 재방문의 감소

박하영,심민섭,송형곤,송근정,Park, Ha Young,Sim, Min Seob,Song, Hyoung Gon,Song, Keun Jeong 한국의료질향상학회 2006 한국의료질향상학회지 Vol.12 No.1

Background : Patients who were discharged from the emergency department(ED) may revisit. These patients are divided into two groups; one is expected scheduled condition, the other is unexpected condition. These patients of inappropriate revisits to the ED would be unsatisfied, difficult to make rapport and take legal action as a result of additional medical charges. The purpose of this study was to reduce inappropriate revisits to the ED with a new method which was developed by analyzing inappropriate revisits in 2002. Methods : This study was conducted in a tertiary hospital consisting of 1,278 beds. The most common cause of inappropriate revisits was the medical team's lack of explanation about a disease. Thus we decided that the effective method was to offer full explanations to patients to understand the clinical pathway of a disease. We made four types of stickers to explain most common 4 diseases in 2003. An emergency physician completed 'discharge explanation report' and explained it to patients in 2004. Results : In 2002 inappropriate revisited patients were 164, patients with four diseases were 79. During the same period of 2003, inappropriate revisited patients were 56 (-65.9%), four disease patients were 6 (-92.4%) and in 2004 inappropriate revisited patients were 52, four disease patients were 19. Causes of revisits were lack of explanation about a disease in 35 patients (44.3%) in 2003, and 5 patients (83.3%) in 2003, and 16 patients (84.2%). Conclusions : Application of 'explanation stickers' at discharge reduced inappropriate revisits from 34.5% in 2002 to 15.9% in 2003. Application of 'Discharge explanation report' by emergency physician reduced inappropriate revisits from 15.9% in 2003 to 13.5% in 2004. Reduction of inappropriate revisits elevated the quality of medical treatment, and decreased patients' dissatisfaction in ED.

외상 환자와 비외상 환자에서 삼투압차와 에탄올 농도의 상관관계 및 추정 에탄올 농도의 정확도

장형우 ( Hyung Woo Chang ),심민섭 ( Min Seob Sim ),한상국 ( Sang Kuk Han ),송형곤 ( Hyoung Gon Song ) 대한외상학회 2009 大韓外傷學會誌 Vol.22 No.2

Purpose: The osmolar gap increases in proportion to the ethanol level. Some previous studies have shown that the correlation between the osmolar gap and the ethanol level is weak in trauma patient by using an indirect comparison with other patients. We conducted a direct comparison of the correlation of the osmolar gap to the ethanol level between trauma patients and non-trauma patients. We also analyzed the accuracy of the estimated ethanol level between the two groups. Methods: The research candidates were adult patients who had visited the emergency department of our hospital from December 2003 to November 2008. By using a retrospective chart review, we classified them into three subgroups: non-trauma without shock, trauma without shock, and trauma with shock. In each group, we compared the correlation between the osmolar gap and the measured ethanol level, and we analyzed the accuracy of the estimated ethanol level by using Lin`s concordance correlation coefficient. Results: Four hundred forty-seven patients were enrolled in this study. For correlation of the osmolar gap and the measured ethanol level, Pearson`s correlation coefficient was 0.916 in all patients, 0.939 in non-trauma without shock patients, 0.917 in trauma without shock patients, and 0.844 in trauma with shock patients. In the analysis of the accuracy of the estimated ethanol level by using Lin`s concordance correlation coefficient, the accuracy in trauma with shock patients was lower than that in non-trauma without shock patients. Conclusion: We found that the correlation between the osmolar gap and the measured ethanol level in the patient group with trauma was lower than it was in the patient group without trauma. Moreover trauma patients with shock had a lower accuracy of the estimated ethanol level than non-trauma patients. (J Korean Soc Traumatol 2009;22:148-153)

응급센터에 내원한 외상 환자에 있어 ICD-10 (International Classification of Disease-10)입력의 정확성과 ICISS (International Classification of Disease Based Injury Severity Score)점수의 오류

이재혁 ( Jae Hyuk Lee ),심민섭 ( Min Seob Sim ) 대한외상학회 2009 大韓外傷學會誌 Vol.22 No.1

Purpose: We designed a retrospective study to measure the accuracy of the ICD-10 (International Classification of Disease-10) code for trauma patients. We also analyzed the error of the ICISS (International Classification of Disease based Injury Severity Score) due to a missing or an incorrect ICD-10 code. Methods: For the measuring the accuracy of the ICD-10 code for trauma patients in a tertiary teaching hospital`s emergency department, two board certified emergency physician performed a retrospective chart review. The ICD-10 code was classified as a main code or a sub-code. The main code was defined as the code of the main department of treatment, and the sub-code was defined as a code other than the main code. We calculated and compared two ICISS for each patient one by using both the existing code and the other by using a corrected code. We compared the proportions of severe trauma (defined as an ICISS less than 0.9) between when the existing code and the corrected code was used respectively. Results: We reviewed the records of 4287 trauma patients who had been treated from July 2008 to November 2008. The accuracy of the main code, the sub-code of emergency department, main-code, the sub-code of hospitalized patients were 97.1%, 59.8%, 98.2% and 57.0%, respectively. Total accuracy of the main and sub-code of emergency department and of hospitalized patients were 91.4% and 58.6%. The number of severe trauma patients increased from 33 to 49 when the corrected code was used in emergency department and increased from 35 to 60 in hospitalized patients. Conclusion: The accuracy of the sub-code was lower than that of the main code. A missing or incorrect sub-code could cause an error in the ICISS and in the number of patients with severe trauma. (J Korean Soc Traumatol 2009;22:108-115)

경기도 지역의 일개 대형 놀이공원에서 발생한 환자를 통한 대형 놀이공원에서의 외상성 손상의 양상

이재혁 ( Jae Hyuk Lee ),심민섭 ( Min Seob Sim ),송형곤 ( Hyoung Gon Song ) 대한외상학회 2009 大韓外傷學會誌 Vol.22 No.1

Purpose: There are no reports on amusement-park-related injuries in Korea. Thus, the objective of this study was to describe traumatic injury patterns that occurring in an amusement park. Methods: The medical records of an infirmary were retrospectively reviewed. From January 1, 2008, to December 31 2008, patients who were transferred to the nearest emergency departments of hospitals for the purpose of further test and treatment were enrolled. Demographics, injury types and involved parts of the body were analyzed. Results: A total of 3,608 patients visited an infirmary for traumatic injury and about two-thirds had soft tissue injuries. Of those, 191 patients (5.3%) were transferred to the emergency department of a hospital. Of the patients who were transferred to a hospital, laceration and contusion were the responsible injuries for about half. Laceration was the most common injury in pediatric patients, and a sprain or a strain was the most common in adult patients. The most commonly injured parts of the body were the extremities in adult patients. However, in pediatric patients, injuries of the head, face and neck were similar to injuries of the extremities. Conclusion: Soft tissue injury was the most common amusement-park-related injury. Laceration was the most common reason to transfer a patient to a hospital. There were differences in injury type and injured part of the body between adult and pediatric patients. (J Korean Soc Traumatol 2009;22:103-107)

다발성 외상환자의 동반흉부손상 진단시 복부/골반 CT 촬영의 유용성

박상오 ( Sang O Park ),송형곤 ( Hyoung Gon Song ),심민섭 ( Min Seob Sim ),정연권 ( Yeon Kwon Jeong ),최필조 ( Pil Cho Choi ) 대한외상학회 2004 大韓外傷學會誌 Vol.17 No.2

Background: The objective of this study is to investigate the effect of the Abdomen/Pelvis CT scan for diagnosis of additional thorax injuries in multiple trauma patients. Methods: This study was conducted with 143 multiple trauma patients who visited on the emergency department of Samsung Medical Center, from May. 1997 to Apr. 2004. We reviewed and analysed medical record, the result of their Chest AP view, abdomen/pelvis and Chest CT scan, retrospectively. Results: For 143 abdomen/pelvis injury patients, 84 patients (58.7%) were identified as having additional thorax injuries by Chest CT scans. Detection rate of rib fractures and pulmonary contusions were no difference between Chest AP view and Abdomen/Pelvis CT scan. But Abdomen/Pelvis CT scan had more effective detection rate than Chest AP view in pneumothoraces (15.9% Vs 93.6%) and hemothorace(69.2% Vs 92.3%). Conclusions: Abdomen/Pelvis CT scan provided more important information than Chest AP view for the diagnosis of the thoracic traumas that often missed on initial evaluation in multiple trauma patients. Among the thoracic injuries, pneumothoraces and hemothoraces can be highly detected in Abdomen/Pelvis CT scan.

중증 외상 환자의 입원 결정 지연에 영향을 미치는 요인과 공동진료시스템

강문주 ( Mun Ju Kang ),신태건 ( Tae Gun Shin ),심민섭 ( Min Seob Sim ),조익준 ( Ik Joon Jo ),송형곤 ( Hyoung Gon Song ) 대한외상학회 2010 大韓外傷學會誌 Vol.23 No.2

Purpose: Prolonged stay in the emergency department (ED), which is closely related with the time interval from the ED visit to a decision to admit, might be associated with poor outcomes for trauma patients and with overcrowding of the ED. Therefore, we examined the factors affecting the delay in the decision to admit severe trauma patients. Also, a multidisciplinary department system was preliminarily evaluated to see if it could reduce the time from triage to the admission decision. Methods: A retrospective observational study was conducted at a tertiary care university hospital without a specialized trauma team or specialized trauma surgeons from January 2009 to March 2010. Severe trauma patients with an International Classification of Disease Based Injury Severity Score (ICISS) below 0.9 were included. A multivariable logistic regression analysis was used to find independent variables associated with a delay in the decision for admission which was defined as the time interval between ED arrival and admission decision exceeded 4 hours. We also simulated the time from triage to the decision for admission by a multidisciplinary department system. Results: A total of 89 patients were enrolled. The average time from triage to the admission decision was 5.2 ±7.1 hours and the average length of the ED stay was 9.0±11.5 hours. The rate of decision delay for admission was 31.5%. A multivariable regression analysis revealed that multiple trauma (odds ratio [OR]: 30.6, 95%; confidence interval [CI]: 3.18-294.71), emergency operation (OR: 0.55, 95%; CI: 0.01-0.96), and treatment in the Department of Neurosurgery (OR: 0.07, 95%; CI: 0.01-0.78) were significantly associated with the decision delay. In a simulation based on a multidisciplinary department system, the virtual time from triage to admission decision was 2.1±1.5 hours. Conclusion: In the ED, patients with severe trauma, multiple trauma was a significant factor causing a delay in the admission decision. On the other hand, emergency operation and treatment in Department of Neurosurgery were negatively associated with the delay. The simulated time from triage to the decision for admission by a multidisciplinary department system was 3 hours shorter than the real one. (J Korean Soc Traumatol 2010;23:113-118)

연구논문 : 심폐소생술 불필요(DN(A)R) 동의 취득에 대한 전공의 의식조사

이태림 ( Tae Rim Lee ),신태건 ( Tae Gun Shin ),심민섭 ( Min Seob Sim ),조익준 ( Ik Joon Jo ),송형곤 ( Hyoung Gon Song ),송근정 ( Keun Jeong Song ),정연권 ( Yeon Kwon Jeong ),최병인 ( B. I Choe ) 한국의료윤리학회 2011 한국의료윤리학회지 Vol.14 No.3

This survey, which was conducted over the course of 3 months in 2009, was designed to investigate what the medical residents of one university hospital in Seoul think about DNAR orders. A total of 214 out of 468 residents (45.7%) answered the questionnaire. Participants were divided into two groups according to their experiences with taking DNAR order. There was no difference between the two groups on the definition of DNAR, its limitations, and when to issue DNAR orders. However, the two groups showed different opinions concerning who should be consulted in obtaining consent for DNAR and whether or not it was necessary to review DNAR orders. Residents who were experienced in giving DNAR orders felt more inclined to discuss the situation with the patient`s family members rather than the patient herself and thought that DNAR orders would not need to be reconsidered. These differences in opinion may result from the different experiences the two groups of residents had in actually ordering DNAR in the clinical setting. This study shows that more research and discussion is needed in order to establish the limitations and precise definition of DNAR orders.

유황처리를 통한 서목태의 조사포닌 함량 비교 연구

김준석 ( Joon Seok Kim ),김용래 ( Yong Rea Kim ),심민섭 ( Min Seob Sim ),조범석 ( Beom Suk Jo ),전찬호 ( Chan Ho Jeon ),안국진 ( Gook Jin An ),이재권 ( Jae Kwon Lee ),안소영 ( Young So An ),강인정 ( In Jung Kang ),남정환 ( Jung Hw 충북대학교 과학교육연구소 2017 과학교육연구논총 Vol.33 No.1

The soybean contain several kinds of triterpenoid saponin with high preventive medicine values. This study investigates the impacts of sulfur processing soybean cultivated with sulfur processing were examined for it configurational property, and then compared with soybean without sulfur processing as a control. A significant decrease in crude saponin content of observed with sulfur processing. Contents of crude saponin decreased about 53% more than non-treated soybean. These results suggest that sulfur processing could be used in the production of teriterpene saponins.