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서정수 ( Jung Soo Seo ),전은지 ( Eun Ji Jun ),정승희 ( Sung Hee Jung ),김명석 ( Myoung Sug Kim ),박명애 ( Myoung Ae Park ),이철호 ( Chul Ho Lee ),한명철 ( Myoung Chul Han ),김진우 ( Jin Woo Kim ),지보영 ( Bo Young Jee ) 한국어병학회 2010 한국어병학회지 Vol.23 No.1
2006년부터 2008년까지 국내로 회귀하는 연어(O. keta)의 소상위치, 암수 및 근육 부위별 아니사키스형 유충의 감염상을 조사하였다. 3년 동안 강에서 채집된 연어 17마리와 바다에서 채집된 13마리의 아니사키스형 유충의 감염율을 조사한 결과, 강에서 채집된 연어의 수컷 및 암컷은 마리 당 아니사키스형 유충이 각각 평균 98±27 및 103±27 마리씩 감염되어져 있었다. 바다에서 채집된 연어의 수컷 및 암컷은 마리 당 아니사키스형 유충이 각각 평균 63±18 및 108±17마리씩 감염되어져 있었고, 암수 및 소상위치간의 아니사키스형 유충의 감염 마리수에서 통계학적 차이는 없는 것으로 나타났다. 아니사키스형 유충의 근육 부위별로 조사하면 복강내측 근육 (abdominal muscle)에 85%가 기생하며, 내장기관에는 거의 유충이 발견되지 않았다. 동정된 아니사키스형 유충은 Anisakis type이 74%며, 나머지는 Contracacecum type로 분류되었다. 연어 근육내에서 아니사키스형 유충의 저온처리에 따른 생존율을 조사하였을시에 최소 6시간 이상의 냉동보존 (-20℃)만이 아니사키스형 유충이 죽는다는 사실을 알 수 있었다. The infestation status of anisakid type larvae was investigated in migrating chum salmon (Oncorhynchus keta), with different condition (captured area, sex, body portion) during 2006~2008. The mean infection number of anisakid larvae per individual female and male fish captured from Namdae river was 98±27, 103±27, respectively. The mean infection number of anisakid larvae per individual female and male fish captured from the coastal area of Yangyang was 63±18 and 108±17, respectively. The anisakid larvae were mainly found in abdominal muscles (85%) but only a little in the visceral portion. Two types of anisakid larvae (A. simplex, Contracaecum type) were identified but other anisakid larvae were not detected. To investigate the effect of storing temperature on the viability of anisakid larvae, the section of abdominal muscle were stored at different temperature (room temperature, 4℃, -20℃, -80℃). As a result, it was necessary to store at -20℃ for more than 6 hrs to kill the larvae. The present results revealed that chum salmon caught in Korea are heavily infected with anisakid larvae, mainly in the abdominal muscle, and A. simplex was dominantly found in this study.
서정수(Seo, Jung-Soo) 계명대학교 산학연구소 2010 經營經濟 Vol.43 No.3
Globalization has been accompanied by a rapid expansion of trade in goods and services and foreign direct investment(FDI). The rapid expansion of trade in intermediate goods and services over last 10 years has highlighted firms are different in productivity and in other aspects such as size. Multinational firm"s sourcing strategy has become complex due to the fragmentation of production processes, and firms face the choice of production location and organizational forms. Mushrooming evidence that firms are heterogeneous and also that they fragment production processes spurred the development of "new new" trade theories based on firm heterogeneity and incomplete contract.
배전자동화 중앙장치에서 필터링 알고리즘을 통한 고장표시 오류 개선방법
서정수(Jung-Soo Seo),김형승(Hyung-Seung Kim),임성일(Sung-Il Lim),최면송(Myeon-Song Choi),이승재(Seung-Jae Lee) 대한전기학회 2015 전기학회논문지 Vol.64 No.10
In this paper, an filtering method of FI(Fault Indication) information generated by FRTU(Feeder Remote Terminal Unit)s is proposed for the present DAS(Distribution Automation System). In order to find fault area, correct FI information should be generated. But when a single line-to-ground fault occurs, FI information is generated in downside of the fault in some circumstance because existing FI algorithm considers only magnitude. These wrong FI information can be removed by changing existing algorithm. An improved algorithm considers both the direction of zero-sequence current and the phase of three-phase current&voltage. But many FRTUs are distributed in DAS and Changing the algorithm all of FRTU will spend a lot of time and cost. On the other hand, an filtering algorithm proposed in this paper can substitute for it. The filtering algorithm also considers both the direction of zero-sequence current and the phase of three-phase current&voltage. In case study, the proposed method has been shown the reasonability in filtering the fault indication information.
넙치 ( Paralichthys olivaceus ) 뇌로부터 phospholipase D 활성 억제 단백질의 정제 및 특성 규명
서정수(Jung Soo Seo),김은희(Eun Hi Kim),황은영(Eun Young Hwang),김남득(Nam Deuk Kim),김동선(Dong Sun Kim),이형호(Hyung Ho Lee),정준기(Joon Ki Chung) 한국수산과학회 2001 한국수산과학회지 Vol.34 No.4
본 연구에서는 넙치, Paralichthys olivaceus 뇌 조직에서 인지질가수분해효소 D (phospholipase D, PLD) 활성의 특성 규명 및 이 활성을 억제하는 단백질을 분리 정제하여 그 특성을 규명하였다. 넙치 뇌 조직에서 PLD 활성이 관찰되었으며, 이 활성은 포스파티딜 이노시톨 비스인산염 (phosphatidyl-inositol 4,5-bisphosphate, PIP₂)에 대해서 의존성을 나타내었으나, ADP-rebosylation factor (ARF)에 의해서는 영향을 받지 않았다. PLD 억제물은 넙치 뇌 조직의 세포질 분획물을 사용하여 여러 종류의 칼럼을 통하여 분리 정제하였고, 그 억제물의 분자크기 및 기작의 특성을 규명하였다. 마지막 chromatography을 통하여 여섯 개의 억제를 나타내는 분획물을 얻었으며. 이 중 두 개의 분획물인 IIA, IIB는 PIP₂-phosphatase activities를 나타내었다. 이 중 IIA 분획물은 면역화학적 분석을 통하여 inositolpolyphosphate 5-phosphatase family로 알려져 있는 신경말단 단백질인 synaptojanin으로 동정되었다. 그리고 IIB fraction은 Superose 12 gel filtration chromatography을 통하여 158-kDa의 크기로 확인되었으며, 이것은 면역화학적 분석을 통하여 synaptojanin과는 별개의 단백질로 판명되었다. 또한, IIB 분획물은 PIP₂phosphatase activity 확인 실험에서 대사산물로서 phosphatidylinositol phosphate (PIP)만을 생성하였다. 이 결과는 IIB분획물이 PIP₂의 4혹은 5 위치의 인산 (phosphate) 중 어느 하나만을 선택적으로 가수분해시킨다는 것을 암시한다. 이상의 연구 결과들을 종합하여 보면, 넙치 뇌 조직에는 다양한 형태의 PIP₂-phosphatases가 존재하며, 이들은 PIP₂-의존적인 PLD 활성의 억제조절과정에서 중요한 역할을 할 것으로 사료된다. Flounder brain cytosol contains protein inhibitors that markedly inhibit the activity of partially purified brain membrane phospholipase D (PLD) which is dependent on phosphatidylinositol 4,5-bisphosphate (PIP₂) but insensitive to ADP-ribosylation factor (ARF). The PLD inhibitors have been enriched through several chromatographic steps and characterized with respect to size and mechanism of inhibition. Sequential chromatography of the brain cytosol yielded six inhibitor fractions. Two (IIA and IIB) of six inhibitor fractions showed the PIP₂-phosphatase activities. IIA was identified as synaptojanin, a nerve terminal protein that has known to be a member of the inositolpolyphosphate 5-phosphatase family, by immunoblot analysis. IIB showed an apparent molecular mass of 158 kDa by Superose 12 gel filtration chromatography and was immunologically distinct from synaptojanin. IIB hydrolyzed PIP₂, yielding only phosphatidylinositol phosphate (PIP) as product, suggesting that IIB hydrolyzes only one phosphate from either the 4- or 5-position of PI (4,5)P₂. These studies demonstrate that the existence of multiple PIP₂-phosphatases have been implicated in the negative regulation of PIP₂-dependent PLD activity within flounder brain.
배전자동화시스템에서 전류방향성을 이용한 단말장치의 고장표시 오류 개선 방법
서정수(Jung-Soo Seo),김형승(Hyung-Seung Kim),임성일(Seong-Il Lim),최면송(Myeon-Song Choi),이승재(Seung-Jae Lee) 대한전기학회 2014 전기학회논문지 Vol.63 No.10
In this paper, an improved method of fault indicator generation algorithm in FRTUs is proposed for the present Distribution Automation System. In order to find fault area, correct FI information should be generated. But when a single line-to-ground fault occurs, FI information is generated in downside of the fault in some circumstance because existing FI algorithm considers only magnitude. It is found that the upside fault current direction if different from the downside fault current direction. Therefore, in order to prevent to generate the wrong fault indication information for FRTU at the downside of the fault, an improved fault indication generation method is developed. Not only the basic conditions are taken into account, but also the directions from the angle difference between zero and positive sequence currents are considered to generated the fault indication information. In case study, the proposed method has been testified and shown the reasonability in generating correct the fault indication information. for many kinds of faults according to conditions.
서정수(Seo, Jung-Soo) 계명대학교 산학연구소 2010 계명대학교 산업경영연구소 단행본 Vol.- No.-
Globalization has been accompanied by a rapid expansion of trade in goods and services and foreign direct investment(FDI). The rapid expansion of trade in intermediate goods and services over last 10 years has highlighted firms are different in productivity and in other aspects such as size. Multinational firm"s sourcing strategy has become complex due to the fragmentation of production processes, and firms face the choice of production location and organizational forms. Mushrooming evidence that firms are heterogeneous and also that they fragment production processes spurred the development of "new new" trade theories based on firm heterogeneity and incomplete contract.