광섬유 Sagnac 간섭계를 이용한 초음파의 비접촉식 감지

이정주,장태성,이승석,김영길,권일범,이왕주,Lee, Jeong-Ju,Jang, Tae-Seong,Lee, Seung-Seok,Kim, Yeong-Gil,Gwon, Il-Beom,Lee, Wang-Ju 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.9

This paper describes a fiber optic sensor suitable for non-contact detection of ultrasonic waves. This sensor is based on a fiber optic Sagnac interferometer. Quadrature phase bias between two interfering laser beams in Sagnac loop is introduced by a polarization controller. A stable quadrature phase bias can be confirmed by observing the interferometer output versus phase bias. This method eliminates a digital signal processing for detection of ultrasonic waves using Sagnac interferometer. Interference intensity is affected by the frequency of ultrasonic waves and the time delay of Sagnac loop. Collimator is attached to the end of the probing fiber to focus the light beam onto the specimen surface and to collect the reflected light back into the fiber probe. Ultrasonic waves produced by conventional ultrasonic transducers are detected. This fiber optic sensor based on Sagnac interferometer is very effective for detection of small displacement with high frequency such as ultrasonic waves used in conventional non-destructive testing.

세제 농도에 따른 세척력과 세제성분의 잔류

이정주,김유겸,Lee, Jung-Ju,Kim, You-Kyum 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.2

Selected standard methods for washing machines: agitating type; horizontal drum type. Market detergents: standard powder detergent; powder detergent; liquid detergents. Standard soiled clothes composed of five types, including the various contaminants from the actual life of soiled clothes, respectively. When washing with the standard course for a washing machine and using the standard, recommended amount of detergent product, the detergency for the agitating-type washing machine and standard soiled clothes increased by approximately 25%, on average, compared to the case of -30% use, and increased by 2% compared to the case of +60% use, respectively. When the horizontal drum-type washing machine was used, detergency increased by approximately 28%, on average, compared to -30% use, and increased by 12% compared to +100% case. Accordingly, the detergency when using the standard amount of detergent increased by approximately 27% on average, and increased by approximately 7% compared to the cases of +60%~+100% use. Moreover, the residue of the detergent components was extremely small, but proportional nonetheless to detergent concentration.

韓國人 隔離集團의 遺傳學的 硏究

이정주,Lee, Chung Choo 한국통합생물학회 1978 동물학회지 Vol.21 No.1

서울, 강남구 서수동 일대가 격리된 集團이기 때문에 ankyloglossia가 높은 빈도로 나타났는지를 간접적으로 究明하고저 실시한 연구에서 다음과 같은 결과를 얻었다. 이 集團의 PTC 味覺 値에 관한 分布相은 他集團과 대개 일치하였다. 그러나 味盲者의 빈도는 남자가 여자보다 有意하게 높았으며 ankyloglossia가 남자에서 많이 발생한 현상과 비슷하였다. 그러나 味盲과 anakyloglossia가 어떤 상호관계가 있는지는 알 수 없었다. 舌運動의 rolling과 folding과 되는 경우는 서울의 他集團과 비교할 때 그頻度가 낮은 편이었다. twisting이 되는 경우는 남녀에 따라 차이가 심하였다. 色感異常의 頻度는 6.21%로 다른 集團보다 약간 높았다. 이와같은 결과로 보아 이 集團은 遺傳的으로 격리된 集團으로 추측되며, 舌動的, PTC 味覺 및 ankyloglossia 사이의 관계와 ankyloglosia의 遺傳樣式등은 앞으로 더 追究해야 할 문제로 생각된다. This study has been carried out with the object of researching into the situation of the genetic isolation of a Korean population located near Seoul. The results obtained are summarized as follows: In general, the distribution of P.T.C. threshold values in the population is close to that of the Seoul population. But the nonataster frequency of male in the population is higher than that of female, and this is in agreement with the status of ankyloglossia frequency in male. However the relationship between the two traits has not been clarified. The gene frequencies of rolling and folding of tongue are slightly lower than that of the Seoul population. The gene frequency conditioning the ability to twist the tongue is lower in the male than in the female. The color-blindness is 6.21 percent, and it is slightly higher than that of other Korean population. All considered, the studied population might be regarded to have been kept in genetic isolation.

소비자 구매특성에 따른 중저가 캐쥬얼 상표 이미지 지각의 차이

이정주,진병호 ( Jung Ju Lee,Byoung Ho Jin ) 대한가정학회 1996 Family and Environment Research Vol.34 No.3

간유(肝兪).중완(中脘)의 대계(大?) 약침(藥鍼)이 급성 산화적 간손상에 미치는 효과

이정주,문진영,Lee Jeong-Joo,Moon Jin-Young 경락경혈학회 2003 대한침구의학회지 Vol.9 No.1

Objectives : Circii Herba has been used as a natural drug for the treatment of stress digestive system disease. The aim of this study is to investigate the role of Circii Herba aqua-acupuncture solution (CHAS) in experimental oxidative liver injury. Methods : In order to investigate the effects of CHAS on acute liver injury, male ICR mice were pretreated with CHAS(0.2 ml/mouse/day) at the loci of BL18 and CV12 for 6days, starved for 24hrs, and administerated acetaminophen(500 mg/kg, i.p.). After acetaminophen administeration, mice were sacrificed, and the liver was removed, rinsed with ice-cold $1.15{\%}$ KCI buffer, and homogenized at $4^{\circ}C$. Fractions(fraction Ⅰ, Ⅱ, Ⅲ) were isolated by differential centrifugation. Lipidperoxide, total SH, and glutathione(GSH) levels were measured in the Fraction Ⅰ. In addition, activities of hepatic enzyme, such as catalase, glutathione peroxidase(GSH-Px) were measured in the Fraction Ⅱ, and glutathione S-transferase(GST) was measured in the Fraction Ⅲ. Results : In vivo treatment of CHAS(BL18 and CV12) showed effective inhibition of acetaminophen induced lipid peroxidation, and showed elevations of total SH, GSH level, catalase, GSH-Px, GST activities. Conclusions : These results suggested that CHAS might suppress the formation of oxidative metabolites, and prevent acetaminophen induced hepatotoxicity.

수재해 정보관리 및 서비스를 위한 공간, 비공간 정보 자료 개념 설계

이정주,김동영,정영훈,황의호,채효석,Lee, Jeong-Ju,Kim, Dong-Young,Jung, Young-Hun,Hwang, Eui-Ho,Chae, Hyo-Sok 한국농공학회 2016 한국농공학회논문집 Vol.58 No.2

This study conducted a basic design of system and interface which provide both of spatial and non-spatial data for water hazard information management. This helps to decide directions of the future integrated water hazard information platform and possible technical examinations of the web-based system for the realization of the prototype. For user friendly system, this study did a survey to investigate the data format, service environment, image processing level and visualization type that users prefer. Also, authorization range was set up by type of the user group. In the water hazard information platform, the data and analysis algorithm were classified by the fields. Furthermore, the platform was consisted with six block systems according to the function and the interface and designed to flexibly mount or modify the additional functions. For a basic design of the data exchange method and protocols, a prototype was constructed by using the spatial information web service technology. The portal service system to visualize and provide spatial data was designed by the WMS/WFS type of OGC standard interface and the FTP/HTTP interface type through open source GIS software for server environment.

수자원 평가를 위한 차세대 기후변화 시나리오 <IPCC Assesment Report 5, RCP 시나리오에 대하여>

이정주,권현한,박재영,염경택,Lee, Jeong-Ju,Gwon, Hyeon-Han,Park, Jae-Yeong,Yeom, Gyeong-Taek 한국수자원학회 2012 물과 미래(한국수자원학회지) Vol.45 No.2

이차전지(二次電池) 제조공정(製造工程)스크랩으로부터 고효율(高效率) 親環境(친환경) 코발트(Co)와 리튬(Li)의 회수(回收)에 관(關)한 연구(硏究)

이정주,정진도,Lee, Jeong-Joo,Chung, Jin-Do 한국자원리싸이클링학회 2010 資源 리싸이클링 Vol.19 No.6

리튬이차전지 양극스크랩으로부터 코발트와 리튬을 회수하기위해 물리적 전처리, 침출, 용매추출 및 회수실험을 행하였다. 실험재료로 제조공정에서 발생되는 코발트계 양극스크랩을 사용하여 단위공정별 최적조건을 구하였다. 물리적전처리 최적조건은 온도 $500{\sim}550^{\circ}C$, 파쇄날 회전속도 1000rpm이었으며, 침출 최적조건은 300rpm, 2M $H_2SO_4$, 2.5M $H_2O_2$, $95^{\circ}C$이었다. D2EHPA(bis(2-ethylhexyl) phosphoric acid) 와 PC88A를 각각 알루미늄과 코발트의 추출제로 사용하여 분리.정제하였으며, 코발트는 염기성시약을 사용하여 $Co(OH)_2$로, 리튬은 탄산나트륨 및 LiOH를 사용하여 탄산리튬($LiCO_3$)으로 회수하였다. $Co(OH)_2$는 열처리를 하여 삼산화코발트($Co_3O_4$)로 만들고 분쇄기를 사용하여 10 ${\mu}m$정도의 입자를 만들었다. 최적조건에서 코발트와 리튬 회수율은 99%이상, 리튬회수율은 99%이상이었으며, 삼산화코발트의 순도는 99.98%이상이었다. A study on the recovery of cobalt and lithium from Lithium Ion Battery(LIB) scraps has been carried out by a physical treatment - leaching - solvent extraction process. The cathode scraps of LIB in production were used as a material of this experiment. The best condition for recovering cobalt from the anode scraps was acquired in each process. The cathode scraps are dissolved in 2M sulfuric acid solution with hydrogen peroxide at $95^{\circ}C$, 700 rpm. The cobalt is concentrated from the leaching solution by means of a solvent extraction circuit with bis(2-ethylhexyl) phosphoric acid(D2EHPA) and PC88A in kerosene, and then cobalt and lithium are recovered as cobalt hydroxide and lithium carbonate by precipitation technology. The purity of cobalt oxide powder was over 99.98% and the average particle size after milling was about 10 lim. The over all recoveries are over 95% for cobalt and lithium. The pilot test of mechanical separation was carried out for the recovery of cobalt from the scraps. The $Co_3O_4$ powder was made by the heat treatment of $Co(OH)_2$ and the average particle size was about 10 ${\mu}m$ after grinding. The recovery was over 99% for cobalt and lithium each other and the purity of cobalt oxide was over 99.98%.

Health Zone_지금은 여성건강시대 - 증상 없는 자궁근종 미리 예방하기

이정주,Lee, Jeong-Ju 한국건강관리협회 2012 건강소식 Vol.36 No.5

자궁근종은 우리나라 여성의 약 40%에서 발견되는 질환 중 하나다. 국민건강보험공단 건강보험정책연구원 자료에 따르면 과거 5년 사이 자궁근종 환자가 20% 이상 크게 늘어난 것으로 분석되었다. 자궁근종 진료인원은 2005년 19만 5,000명에서 2009년 23만 7,000명으로 매년 증가하고 있는 것으로 나타났고 2009년 실 진료비는 999억 원에 달했다. 이 중 20~30대 가임기 여성들의 환자 수가 계속해서 증가하는 추세이며, 30~40대 환자의 비율은 70%에 달해 여성들의 자궁근종에 대한 관심이 날로 높이지고 있다.

센서네트워크 어플리케이션을 위한 네트워크 프레임워크와 통합시뮬레이터 간의 인터페이스 구현 및 설계

이정주,곽동은,서민석,박현주,Lee, Jeong-Joo,Koak, Dong-Eun,Seo, Min-Suk,Park, Hyun-Ju 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.2

신뢰성 있는 소프트웨어 개발을 위해서 가장 중요한 단계 중의 하나가 소프트웨어 테스트이다. 최근에 점진적이고 반복적인 소프트웨어 개발 방법론이 각광을 받으면서, 소프트웨어의 작은 변경에 따른 회귀 테스트의 중요성이 점점 커지고 있다. 또한 센서네트워크와 같은 다수의 노드 환경에서 동작하는 소프트웨어를 검증하기 위한 시뮬레이터 환경이 필요하다. 본 논문에서는 네트워크 프레임워크와 통합시뮬레이터 간의 인터페이스 모듈을 구현하여, 네트워크 프레임워크로 구현한 센서네트워크 어플리케이션을 다양한 가상의 환경에서 단위테스트하기 위한 환경을 제공한다. For the development of reliable software, Software testing is the most important. Recently small changes of the software according to the importance of regression testing is growing. To verify Application of a large number of nodes, Network simulator environment is required. This paper proposed interface module between network framework for sensor network application and co-simulator to unit test sensor network application. To conclude, developer can focus on sensor network application implementation only, so the improved integrated simulator contributes to increase development productivity.