해저광케이블 수리를 위한 효율적인 탐지 및 측정 기법

이영선,정재진,신현식,Lee, Young-Sun,Jung, Jae-Jin,Shin, Hyun-Sik 한국전자통신학회 2008 한국전자통신학회 논문지 Vol.3 No.1

해저광케이블은 국제통신의 98% 이상을 처리하고 있는 국가의 중요한 정보통신 인프라이다. 하지만 선박의 닻, 어선의 어구, 해저 지진 등 다양한 요인으로 인해 고장이 발생하며, 고장 발생시 대용량 해저통신 트래픽의 영향을 최소화하고, 케이블 수리 선박의 운영비용 절감을 위해서 수리 기간을 최대한 단축해야 한다. 해저광케이블 고장 유형은 Shunt Fault, Cable Cut, Open Fault, Fiber Break 등 여러 유형이 있으며, 고장이 발생하면 육상 터미널 국사(육양국)에서 정확하고 신속하게 고장 유형 및 고장 지점을 파악하고, 케이블 수리 선박은 수리 현장으로 출동하여 수리 작업을 수행하게 된다. 수리작업 기간 중 육양국에서는 케이블 수리 선박에서 요청하는 각종 Test를 수행하게 되며, 이때 육양국 Test 기법은 매우 중요하다. 본 논문에서는 해저광케이블 고장 유형 및 고장 지점 탐지 기법을 제시하고, 해저광케이블 수리기간 단축을 위한 육양국 Test 기법을 고찰하고자 한다. Submarine cable is the most important IT infrastructure for international communication across oceans. However, a cable fault rarely happens by ship's anchor, fishing gears, submarine earthquake, and so on, and we need to improve on repair time for the reducing expenses of cable repair ship as well as the stability of high-capacity submarine optical network. There are several kinds of cable faults such as Shunt fault, Cable cut, Open fault and Fiber break. When a fault is occurred, cable landing stations(CLS) have to analysis failure quickly and accurately to find the type and the location of a cable fault. During the repair period, CLS should swiftly perform the tests requested by cable repair ship. In order to make rapid progress on cable repair, CLS test technique is very important. So, in order to reduce the repair time, this paper is studying the CLS test techniques of locating a submarine cable fault and of checking the splicing point performed by cable repair ship.

원지(Polygala tenuifolia WILLD.) 뿌리의 성분연구

이영선,이제현,김정숙,김진숙,Lee, Young-Sun,Lee, Je-Hyun,Kim, Chung-Sook,Kim, Jin-Sook 한국생약학회 1999 생약학회지 Vol.30 No.2

Five compounds were isolated from the roots of Polygala tenuifolia (Polygalaceae). On the basis of spectroscopic evidences, the structures of these compounds were characterized as ${\alpha}-D-(6-O-sinapoyl)-glucopyranosyl(1{\rightarrow}2')-{\beta}-D-(3'-O-sinapoyl)-fructofuranoside$ (P3), ${\alpha}$-D-{6-O-(p-methoxybenzoyl)}-glucopyranosyl-$(1{\rightarrow}2')$-${\beta}$-D-{3'-O-(3',4',5'-trimethoxycinnamoyl)}-fructofuranoside(P4), ${\alpha}$-D-{6-O-(p-hydroxybenzoyl)}-glucopyranosyl-$(1{\rightarrow}2')$-${\beta}$-D-{3'-O-(3',4',5'-trimethoxycinnamoyl)}-fructofuranoside(P5), ${\alpha}-D-glucopyranosyl-(1{\rightarrow}2')-{\beta}-D-(1'-O-sinapoyl)-fructofuranoside$(P6), $1,5-anhydro-D-glucitol$(P7) respectively. ${\alpha}$-D-{6-O-(p-Methoxybenzoyl)}-glucopyranosyl-$(1{\rightarrow}2')$-${\beta}$-D-{3'-O-(3',4',5'-trimethoxycinnamoyl)}-fructofuranoside(P4) and ${\alpha}-D-glucopyranosyl-(1{\rightarrow}2')-{\beta}-D-(1'-O-sinapoyl)-fructofuranoside$(P6) were isolated for the first time from the genus of Polygala. 1,5-Anhydro-D-glucitol(P7) was isolated without hydrolysis for the first time from the root of Polygala tenuifolia.

도시지역 독자녀 고등학생들의 사회심리적 요인과 정신건강과의 관계

이영선,김광환,조영채,Lee, Young-Sun,Kim, Kwang-Hwan,Cho, Young-Chae 대한예방의학회 2006 예방의학회지 Vol.39 No.5

Objectives: This study was performed to determine the mental health of high school students, and specifically that of children with no siblings in urban areas, and we aimed at revealing the various potential influences of different psycho-social factors Methods: The participants were, 514 high school students who were the 1st- to 3rd-graders in Daejon City; they were, given self-administered questionnaires that required no signature during the period of March through June 2005. The analyzed items included the general character of the subjects, the symptoms of stress and depression for mental health, self-esteem as a psychological component, anxiety, dependent behavioral traits and, social support of family members and friends. Results: The study results suggested that the group of urban high school children with no siblings had a higher tendency for stress and depression than did the urban high school children with siblings. The mental health and psychosocial factors were found to be influenced by friends, a sense of satisfaction at school and home life, and emotional support as well. Conclusions: In conclusion, emotional support by the family members can improve mental health by reducing anxiety, stress and depression.

다기능 친환경 저융점 접합소재 설계 기술

이영선,이광석,박진우,홍순익,배동현,Lee, Young-Seon,Lee, Kwang-Seok,Park, Jin-Woo,Hong, Sun-Ig,Bae, Dong-Hyun 대한용접접합학회 2010 대한용접·접합학회지 Vol.28 No.3

고추냉이 추출액의 항산화 효과

이영선,Lee, Young-Sun 대한예방한의학회 2008 대한예방한의학회지 Vol.12 No.1

This study was carried out to investigate the anti-oxidant effect of Wasabia japonica(WJ). The anti-oxidant activities of various extracts from WJ were investigated. The water and ethanol extracts of WJ leaf were found to cause significant free radical scavenging effects on DPPH and nitric oxide(NO). Sprague-Dawley male rats were randomly assigned to one normal diet and three high cholesterol diet groups which contained 1%(w/w) cholesterol. After 4weeks cholesterol diet, the groups of high cholesterol diet were classified to control(normal diet only), WJR5(normal diet and 5% WJ root) and WJL5(normal diet and 5% WJ leaf). Liver xanthine oxidase(XO) activity in the rats of high cholesterol diet was decreased up to the levels of normal diet group according to WJ diet. The results indicated that WJ possesses antioxidant effects through free radical scavenging effects on DPPH, NO and the decreasing of XO activity. In view of these results, WJ is expected to be an effective material for the anti-oxidant.

파장분할다중 방식 광전송망을 위한 초광대역 광증폭기

이영선,정재진,Lee, Young-Sun,Jung, Jae-Jin 한국전자통신학회 2008 한국전자통신학회 논문지 Vol.3 No.4

인터넷 이용자가 급속히 증가함에 따라 네트워크의 각 노드에서 감당해야 할 트래픽 용량이 수십 테라급에 이를 것으로 예상하고 있다. 한 개의 광섬유를 통해 테라비트 이상의 전송을 위해서는 기존의 시분할다중 방식 외에 파장분할다중 방식을 사용해야 한다. 파장분할다중 방식의 전송 용량을 확대하기 위해서는 채널당 전송 속도 또는 채널의 수를 증가시켜야 한다. 채널의 수를 증가시키기 위해서는 채널 간격을 줄이는 방안과 전송 대역폭을 넓히는 방안이 있다. 전송 대역폭을 넓히기 위해서는 초광대역 광증폭 기술이 필요하다. 본 논문에서는 C/L band에서 사용되는 에르븀 첨가 광섬유 증폭기, 광섬유 라만 증폭기 및 S band 광증폭기들을 소개하고, 다양한 광신호 증폭기술에 대한 발전 동향을 분석하고자 한다. Affordable traffic capacity of each node in networks is expected to reach in Tb/s range in proportion to the rapid growth of Internet users. To transmit more than Tb/s per fiber pair, WDM should be used as well as existing TDM. To increase the capacity of transmission in WDM networks, there are two ways, increasing channel speed or channel quantity. To increase the channel quantity, there are two ways, narrow spacing or expanding transmission bandwidth. To expand bandwidth, ultra-broadband optical amplifier technology is necessary. In this paper, we introduce EDFA in effect at C/L band, FRA, and some optical amplifiers in effect at S band, and analyze the development trend of various amplification technologies.

우리나라에서 분리한 참다래 궤양병균 Pseudomonas syringae pv. actinidiae 균주들의 Biovar

이영선,김진,김경희,최으뜸,고영진,정재성,Lee, Young Sun,Kim, Jin,Kim, Gyoung Hee,Choi, Eu Ddeum,Koh, Young Jin,Jung, Jae Sung 한국식물병리학회 2017 식물병연구 Vol.23 No.1

Pseudomonas syringae pv. actinidiae는 참다래에 궤양병을 일으키는 원인세균이다. 이 병원균 집단은 분자적 특성에 따라 biovar 1, 2, 3로 나누어진다. 본 연구에서는 1997년부터 우리나라에서 분리되어 순천대학교 생물학과에 보관 중인 P. syringae pv. actinidiae 균주들의 biovar를 기존에 발표된 biovar에 특이적인 PCR primers를 사용하여 동정하였다. 전체 682개 균주 중 biovar 2에 속한 균주가 288개, biovar 3에 속한 균주가 394개였다. 그러나 우리나라에서 분리된 균주 중 biovar 1에 속하는 균주는 없었다. Biovar 3 균주에 의한 궤양병의 갑작스러운 발생과 확산은 이 균주가 빠른 전파력을 가지고 있음을 말해준다. Pseudomonas syringae pv. actinidiae is the causative agent of bacterial canker of kiwifruit. The population of this pathogen is differentiated into three biovars, biovar 1, 2 and 3, according to their molecular characteristics. In this work, we determined biovars of P. syringae pv. actinidiae strains isolated in Korea since 1997 and stored in Department of Biology, Sunchon National University, Suncheon, Korea. The biovars of P. syringae pv. actinidiae strains were determined by PCR using biovar specific primers developed previously. Of 682 strains investigated, 288 strains belonged to biovar 2, while 394 strains were biovar 3. There were no P. syringae pv. actinidiae strains belonging to biovar 1 among the strains isolated in Korea. Sudden outbreak and spreading of bacterial canker caused by biovar 3 strain suggest that this strain has character of rapid transmission.

라이프 시나리오를 통해 본 미래주택 내 생활행위 수행주체 변화에 관한 연구

이영선,이연숙,안창헌,Lee, Young-Sun,Lee, Yeun-Sook,Ahn, Chang-Houn 한국주거학회 2010 한국주거학회 논문집 Vol.21 No.5

With rapid development of various information and communication technologies, to forecast future became important for coping with new environment. Experts in each field of study are forecasting future society, and considerable life scenarios are derived in the process. Life scenarios help people to approach and understand future circumstances easily. Therefore, to study future housing with life scenarios as materials will be helpful to establish the direction to the development of current housing. The purpose of this research is to examine what characterizes the housing functions and life behaviors of future house and what is changing from the housing functions and life behaviors of past and present. Content analysis was used as research method. The subject was 10 future forecasting books which reflects daily life in the house, and 1 episode relating residential space as 1 analysis unit, the total of 213 episodes were analyzed as materials. As a result, most of the life behaviors in the house are expected to be performed by robots instead of humans in the future. On the other hand, partial life behaviors are already being performed mostly by computer system, and another partial life behaviors show that the role-performance of them are not being totally by robots but partially with human.

구성주의적 ISD와 디자인씽킹 융합 모형의 적용 가능성 탐색

이영선(Lee, Young Sun),장환영(Jang, Hwan Young) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.20

본 연구는 학습자 중심의 교육 패러다임으로의 전환이 강조되는 평생교육의 상황·맥락적 조건에서 예비 평생교육사가 학습자 중심의 프로그램 개발 역량을 보다 효과적으로 습득하도록 지원하기 위한 새로운 교육설계모형으로 구성주의적 ISD모형과 디자인씽킹의 융합을 시도하였다. 연구자들은 이 융합모형을 ‘평생교육 프로그램 개발론’이라는 한 학기 수업에 적용하였고, 학생들이 이 모형을 활용하여 ‘사범대생 대상의 죽음교육 프로그램’을 개발하는 실습을 하도록 지원함으로써 이 모형의 활용 가능성을 확인하였다. 연구 결과에서 이 융합모형은 구성주의적 ISD모형과 디자인씽킹의 상호보완적 결합으로 초보 개발자인 학생들에게도 학습자 중심의 프로그램을 개발할 수 있는 역량을 습득하는데 도움을 줄 수 있음을 확인하였다. 하지만 이 융합모형이 효과적으로 활용되기 위해서는 학습자가 주체가 되는 학습으로의 인식전환을 위한 노력을 포함하여 학습자 중심의 교육환경을 지원하기 위한 교수자와 설계자들의 철학과 섬세한 지원이 요구된다는 시사점도 얻을 수 있었다. 이 융합모형 적용 연구의 시사점과 제언을 기반으로 평생교육에 적용을 위한 추가연구가 계속되어 평생교육 현장에 적합한 전략들이 반영된다면 이 융합모형의 활용이 ‘학습자 중심 학습 패러다임 구축’을 위한 평생교육의 혁신에 기여할 수 있으리라 기대한다. This study attempted to converge the constructivist ISD model and design thinking as a new educational design model to support preliminary lifelong educators more effectively acquiring learner-centered program development competencies in the context of lifelong education in which the transition to a learner-centered educational paradigm is emphasized. Researchers confirmed the applicability of this convergence model by applying this model to a semester class called ‘Theory of program development for lifelong education’, and by supporting students to use this model to practice developing a ‘Death Education Program for university students’. From the results of the study, it was confirmed that this convergence model can help students who are novice developers to acquire the competence to develop learner-centered programs through the complementary combination of constructivist ISD model and design thinking. However, in order for this convergence model to be effectively utilized, it has implications that the philosophy and delicate support of instructors and designers are required to support a learner-centered educational environment, including efforts to shift the learner s paradigm about learning. Based on the lessons learned and suggestions of this convergence model application research, if additional research for application to lifelong education continues and strategies suitable for the lifelong education field are reflected, the use of this model can contribute to building a learner-centered education paradigm in lifelong education field.

군산시 경로당 현장조사를 통한 공간구성분석

이영선(Lee, Young Sun),이혜빈(Lee, Hye Bin),오명원(Oh, Myoung Won),유성은(Yoo, Sung Eun) 한국실내디자인학회 2023 한국실내디자인학회 학술대회논문집 Vol.25 No.1