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이석규,한정희,정현규,Lee, Seok-kyu,Han, Jeong-hee,Jeong, Hyun-kyu 대한수의학회 1999 大韓獸醫學會誌 Vol.39 No.1
From 2,373 slaughtered pigs examined, 1,899 of them had visible evidence of pulmonary lesion. The lungs with pulmonary lesion were examined by grossly, histopathological technique to investigate the prevalence according to season, severity of pulmonary lesion, types of the pneumonia and relationship between rearing management and prevalence of pulmonary lesion. The results were as follows : 1. Prevalence of pneumonia according to season was 72.3% to 85.9% and the highest prevalence was in winter. 2. In the severity of pulmonary lesion, rates mild, moderate and severe lesions were 38.3%, 47.0% and 14.7%, respectively. Prevalence of mild lesion was the highest in autumn. Prevalence of moderate and severe lesions was the highest in winter. 3. In the type of pneumonia, rates of interstitial pneumonia and bronchopneumonia fibrinous pneumonia were 23.6%, 13.0%, and 3.4%, respectively. Prevalence of interstitial pneumonia was high in spring and autumn while that of broncho-pneumonia and fibrinous pneumonia was high in winter and summer, respectively. 4. In relationship of pulmonary lesions according to severity of pulmonary lesion and types of pneumonia, similarity was observed in prevalence of mild lesion and bronchopneumonia.
양돈장의 사양 및 위생관리에 따른 출하돈에서의 폐렴발생
이석규,한정희,김준영,김현주,Lee, Seok-kyu,Han, Jeong-hee,Kim, Jun-young,Kim, Hyun-ju 대한수의학회 1998 大韓獸醫學會誌 Vol.38 No.4
Among 2,373 slaughtered pigs examined for one year(March 1995 to February 1996), 1,899 pigs had visible pulmonary lesions. Prevalence rate of pulmonary lesion was examined by pathological techniques according to rearing and health managements of pig farms. The results were as follows : 1. Prevalence rate of pulmonary lesion in all-in/all-out flow farms(71.9%) was lower than that in continous flow farms(85.2%). 2. Prevalence rate of pulmonary lesion in non-infected farms with Aujeszky's disease virus and/or porcine reproductive and respiratory syndrome virus(74.4%) was lower than that in infected farms(85.5%). 3. During winter, prevalence rate of pulmonary lesion in farms with cold-control facilities(83.2%) was lower than that in farms with poor cold-control facilities.
M&S를 이용한 항공기용 통합형 전기식 구동장치의 동적 안전성 연구
이석규(Sock-Kyu Lee),이병호(Byoung-Ho Lee),이증(Jeung Lee),강동석(Dong-Seok Kang),최관호(Kwan-ho Choi) 한국소음진동공학회 2015 한국소음진동공학회 논문집 Vol.25 No.2
Electro-mechanical actuator installed on aircraft consists of a decelerator which magnifies the torque in order to rotate an axis connected with aircraft control surface, a control section which controls the motor assembly through receiving orders from cockpit and a motor assembly which rotates the decelerator. Electro-mechanical actuator controls aircraft altitude, position, landing, takeoff, etc. It is an important part of a aircraft. Aircraft maneuvering causes vibrations to electro-mechanical actuator. Vibrations may result in structural fatigue. For that reason, it is necessary to analyze the system structural safety. In order to analyze the system structural safety. It is needed reasonable finite element model and structural response stress closed to real value. In this paper, analytic model is derived by using the simplified finite element model, and damping ratio which is closely related to response stress is derived by using modal test. So, we developed analytic model in less than 10 % error rate, compared with modal test. Vibration response stress close to real value was estimated from analytic model modified with modal experimental damping ratio. Estimation method for damping ratio with empirical formula was suggested partly. Finally, It was proved that electro-mechanical actuator had reasonable structure margin of safety at environmental random 3σstress during life cycle.
바람에 노출되는 외팔보 구조물의 동적 영향성 고찰을 위한 실험 프로세스 연구
이석규(Sock-Kyu Lee),김상현(Sang-Hyun Kim),이증(Jeung Lee),강동석(Dong-Seok Kang),황기민(Ki-Min Hwang) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
Cantilever structures such as tall building, solar tracker system, large satellite communication system are needed to be designed robustly against wind induced vibration. In each case, There are important factors such as human inconvenience, track performance, communication quality as each purpose. In this study about large satellite communication system, most of all, the accuracy of point angle is significant factor. In this paper, large satellite communication system and it’s point angle specification will be introduced. and it will be refered that correlation between point angle deformation to be simulated by static analysis and 3dB beam width. also it will be introduced the plan to measure the real data when the system be exposed to wind, and the process to analyze the dynamic effects related to wind excited response such as vortex.
M&S를 이용한 항공기용 통합형 전기식 구동장치의 동적 안전성 연구
이석규(Sock-Kyu Lee),이병호(Byoung-Ho Lee),이증(Jeung Lee),강동석(Dong-Seok Kang),최관호(Kwan-ho Choi) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
Electro-Mechanical Actuator installed on aircraft consists of a decelerator which magnifies the torque to rotate an axis connected with aircraft control surface, a control section which controls the motor assembly through receiving orders from cockpit and a motor assembly which rotates the decelerator. EMA controls aircraft attitued, position, landing, takeoff, etc. It is important part of a aircraft. Aircraft maneuvering make vibration of EMA. Vibration may cause the vibration fatigue. For that reason, it is necessary to analyze the system safety. In this paper, first EMA is modeled in finite element method and analyzed the response from input vibration. second EMA is tested and analyzed from modal experimental data. third EMA Fe model is updated and re analyzed. and EMA is verified safety with 3σstress and S/N curves.
국어과 수업 분석의 방법 연구 - 학습자의 언어 활동을 중심으로 : 국어과 수업 분석의 방법 연구
이석규(Lee Seok-kyu) 한국어문교육학회 2006 어문학교육 Vol.32 No.-
The purpose of this study is to develop an instruction analysis device that reflects characteristics of Korean language studies, use it in actual Korean language instructions and find other applications of the device. For the purpose, this researcher reviewed existing methods of instruction analysis. Chapter Ⅱ clarified the meaning and objectives of instruction analysis and reviewed existing instruction research methods, or quantitative, qualitative and empirical approaches. In Chapter Ⅲ, the researcher made a direction of developing instruction analysis device and actually developed such device reflecting characteristics of Korean language studies. Then the researcher analyzed a few of actual Korean language instructions with the developed tool and suggested other applications of the device. In developing instruction analysis device, the study considered advantages and disadvantages of existing instruction analysis methods, characteristics of Korean language studies, special conditions of individual Korean language instruction and the utility of such device in actual Korean language education. The researcher also tried to develop the device to be generalized as a criteria for instruction efficiency and instruction design. In the study, language activities made during Korean language instruction were classified largely into content learning and instruction development activities. In the former activities, reading was categorized into (1) content check-up and (2) the criticism of content, speaking into (3) simple response and (2) content generation and organization, reading into (5) vocal reading, (6) content check-up and (7) the criticism of content and writing into (8) writing letters, (9) content check-up and (10) content generation and organization. While, the latter activities were categorized largely into (11) listening, (12) speaking, (13) reading and (14) writing. By using the developed device, avoiding such existing methods as time measurement and discourse analysis, the study classified all instruction activities into the above categories and thereon analyzed them in terms of the proportion of language activity, improvement in skills of thinking and relevance to learning purpose. The device was also used in analyzing instructional proposals, designing instruction and determining the efficiency of ICT materials. The instruction analysis device as developed here is significant in that it analyzes all instruction activities, reflects characteristics of Korean language instruction as a language activity, has a variety of applications and can be used for each individual instruction.