공연미학적 측면에서 본 A. Strindberg 의 사비극에 관한 연구

이주상 한국연극학회 1985 한국연극학 Vol.2 No.1

메니에르병에서 Cochlear Hydrops Analysis Masking Procedure 검사의 진단적 유용성

이주상,이효정,박은선,홍성광,이정학,김형종 대한평형의학회 2011 Research in Vestibular Science Vol.10 No.1

Background and Objectives: Patients with Ménière’s disease often present with a great variety of symptoms, especially at the onset of the disease. However, there is no single test that is definitive for making the diagnosis of Ménière’s disease. Recently, a new diagnostic test, the cochlear hydrops analysis masking procedure (CHAMP) was introduced as a test for endolymphatic hydrops. The aim of this study is to evaluate the diagnostic value of CHAMP test in Ménière’s disease in comparison with that of electrocochleography. Materials and Methods: The CHAMP test and electrocochleography were simultaneously performed in 14 cases of definite Ménière’s disease and 8 normal healthy volunteers (16 ears). Positive criteria were defined as being more than 0.35 in summating potential/action potential (SP/AP)ratio, 0.3 ms or less in latency delay and 0.95 or less in complex amplitude ratio. Measured parameters from each test were compared between the groups, and sensitivity and specificity of each test in diagnosing Ménière’s disease were calculated. Results: There was no significant difference in the SP/AP ratio of electrocochleography between the Ménière’s disease and control groups. In CHAMP test, the latency delay was shorter and the complex amplitude ratio was smaller (p<0.001). While taking positive results from both test parameters, the sensitivity and specificity of CHAMP test were 85.7% and 87.5%, respectively. Conclusion:The CHAMP seems to be a clinically useful tool in diagnosing Ménière’s disease and might be better than electrocochleography to detect endolymphatic hydrops.

Evaluation of Healing Effect by Rest Periods on Asphalt Concrete Slab Using MMLS3 and NDE Techniques

이주상,이상염,Y. Richard Kim 대한토목학회 2011 KSCE JOURNAL OF CIVIL ENGINEERING Vol.15 No.3

Fatigue life of asphalt concrete pavement is one of the most important factors in pavement management systems, which can be increased by healing effect. The healing effect by rest periods was evaluated by the third scale Model Mobile Loading Simulator (MMLS3) and Nondestructive Evaluation (NDE) techniques. Impact method of stress wave was optimized to accurately analyze the phase velocity and obtain effective sampling depth. In general, the phase velocities decrease as the pavement structure is degraded by the increase of wheel applications or load levels along both of the stress wave and ultra sonic measurement, while the recovery of phase velocities during rest periods is successfully evaluated by both techniques. Finally, based on the observation of phase velocities of waves, it was possible to confirm the healing effect of Asphalt Concrete (AC) by rest periods.

교황 선출 ‘막전막후’

이주상 관훈클럽 2013 관훈저널 Vol.- No.127

모바일 Ad-hoc 무선 센서 네트워크에서 안정된 경로의 Life-Time 을 지원하기 위한 협력 도움 라우팅 프로토콜

이주상,안병구,공형윤,안홍영,Lee, Joo-Sang,An, Beongku,Kong, Hyung-Yun,Ahn, Hongyoung 한국인터넷방송통신학회 2008 한국인터넷방송통신학회 논문지 Vol.8 No.3

본 논문에서는 모바일 ad-hoc 무선 센서 네트워크[1]에서 안정된 경로의 설정 및 설정된 경로의 lifetime 을 효과적으로 지원하여 데이터 전송효율을 향상시키기 위한 협력 도움 라우팅 프로토콜(CARP: Cooperative_Aided Routing Protocol) 을 제안한다. 제안된 라우팅 프로토콜의 기본 아이디어 및 특징은 다음과 같다. 첫째, 소스노드와 목적지 노드 사이의 안정된 라우팅 경로의 설정이다. 본 연구에서는 모바일 노드들의 이동성 정보를 이용한 엔트로피 기반의 안정된 경로 설정방법을 제안 사용한다. 둘째, 협력도움 전송 방법이다[3][4][5]. 설정된 경로 위로 데이터 패킷을 전송 할 때 경로 lifetime과 SNR의 효과적인 지원으로 데이터 전송률을 증가시키기 위해 이웃 노드들로부터 협력 도움을 받는다. 셋째, 기존의 센서 네트워크는 주로 고정된 노드 환경에서 많은 연구가 되어 왔지만, 본 연구에서는 노드들의 이동성을 고려한 환경에서 연구가 이루어진다. 제안된 CARP 의 성능평가는 OPNET(Optimized Network Engineering Tool)을 사용하여 이루어졌으며 성능평가를 통하여 제안한 프로토콜은 안정된 경로의 설정 및 데이터 전송효율을 효과적으로 증가 시킬 수 있음을 알 수 있다.

모바일 무선 센서네트워크에서 전송 효율 향상을 지원하기 위한 OFDM을 사용한 클러스터링 기반의 협력도움 라우팅

이주상,안병구 한국인터넷방송통신학회 2010 한국인터넷방송통신학회 논문지 Vol.10 No.6

본 논문에서는 모바일 무선 센서네트워크에서 전송효율을 증가시키기 위해 OFDM을 사용한 클러스터링 기반의 협력도움 라우팅 방법을 제안한다. 제안된 방법의 주요한 특징 및 기여도는 다음과 같다. 첫째, 안정적인 전송 서비스를 효과적으로 지원하기 위하여 하부 구조로서 모바일 노드들의 위치 정보를 이용한 클러스터링 방법을 사용한다. 둘째, 데이터 전송 및 신뢰성 효율을 향상시키기 위해 하부구조로 사용된 클러스터링 정보를 이용한 협력전송 방법이 제안 사용된다. 셋째, 채널 효율을 통한 전송효율 향상을 위해서 OFDM 기반의 전송방법이 사용된다. 넷째, 기존의 센서네트워크는 주로 고정된 센서 노드들로 구성된 환경에서 많은 연구가 되어 왔지만, 본 연구에서는 노드들의 이동성을 고려한 모바일 무선 센서네트워크에서 연구가 이루어진다. 제안된 방법의 성능평가는 OPNET(Optimized Network Engineering Tool)을 사용한 시뮬레이션과 이론적 분석을 통하여 이루어진다. 성능평가를 통하여 제안된 방법은 데이터 전송효율을 효과적으로 증가 시킬 수 있음을 알 수 있다. In this paper, we propose a Clustering-based Cooperative Routing using OFDM (CCRO) for supporting transmission efficiency in mobile wireless sensor networks. The main features and contributions of the proposed method are as follows. First, the clustering method which uses the location information of nodes as underlying infrastructure for supporting stable transmission services efficiently is used. Second, cluster-based cooperative data transmission method is used for improving data transmission and reliability services. Third, OFDM based data transmission method is used for improving data transmission ratio with channel efficiency. Fourth, we consider realistic approach in the view points of the mobile ad-hoc wireless sensor networks while conventional methods just consider fixed sensor network environments. The performance evaluation of the proposed method is performed via simulation using OPNET and theoretical analysis. The results of performance evaluation show improvement of transmission efficiency.

코로나 방전에 의한 전기집진장치 특성에 관한 연구

이주상 한국도시환경학회 2003 한국도시환경학회지 Vol.3 No.2

흡연이 부비동 내시경 수술에 미치는 영향

이주상,장은석,김해영,김진영,맹진우,고일주 대한비과학회 2009 Journal of rhinology Vol.16 No.2

Background and Objectives:This study is designed to assess the effect of smoking on the outcome of endoscopic sinus surgery. Materials and Methods:A total of 66 patients who underwent endoscopic sinus surgery with the diagnosis of chronic sinusitis were evaluated. They were divided into 3 groups; non-smoking, quit-smoking and still-smoking groups. Preoperative and postoperative visual analogue scale (VAS), Sinonasal Outcome Test (SNOT), and endoscopic score for each group were obtained and compared. Results:There were statistically significant correlations between VAS, SNOT score and smoking. However, all patients showed a similar degree of improvement on the subjective symptoms regardless of smoking or nonsmoking. And, postoperative relief of subjective symptoms was not apparent after smoking cessation. In objective findings, postoperative endoscopic scores were 1.6 in non-smoking group, 1.8 in quit-smoking group and 2.7 in still-smoking group. Stillsmoking group had the worst endoscopic result, However, these differences did not reach a statistical significance. Conclusion: This study suggests that smoking had a negative effect on subjective symptoms but not in objective endoscopic findings. In addition, the cessation of smoking after sinus surgery may have no meaningful benefit on the outcome of surgery. Background and Objectives:This study is designed to assess the effect of smoking on the outcome of endoscopic sinus surgery. Materials and Methods:A total of 66 patients who underwent endoscopic sinus surgery with the diagnosis of chronic sinusitis were evaluated. They were divided into 3 groups; non-smoking, quit-smoking and still-smoking groups. Preoperative and postoperative visual analogue scale (VAS), Sinonasal Outcome Test (SNOT), and endoscopic score for each group were obtained and compared. Results:There were statistically significant correlations between VAS, SNOT score and smoking. However, all patients showed a similar degree of improvement on the subjective symptoms regardless of smoking or nonsmoking. And, postoperative relief of subjective symptoms was not apparent after smoking cessation. In objective findings, postoperative endoscopic scores were 1.6 in non-smoking group, 1.8 in quit-smoking group and 2.7 in still-smoking group. Stillsmoking group had the worst endoscopic result, However, these differences did not reach a statistical significance. Conclusion: This study suggests that smoking had a negative effect on subjective symptoms but not in objective endoscopic findings. In addition, the cessation of smoking after sinus surgery may have no meaningful benefit on the outcome of surgery.

Cyclone 집진기에 의한 호흡성 분진입자의 제어성능 효과

이주상 한국도시환경학회 2005 한국도시환경학회지 Vol.5 No.1

유전 알고리즘을 이용한 주식시장에서의 기술적 분석에 의한 매매에 관한 연구

이주상,이상욱,장석철,안병하 대한산업공학회 2004 대한산업공학회 추계학술대회논문집 Vol.2004 No.11