중합도에 따른 저점도 실리콘유의 유전 특성

조경순,Cho, Kyung-Soon 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.12

The characteristics of dielectric constant and $tan{\delta}$ of low viscosity silicone oils with changing degree of polymerization were investigated. The result shows dipole loss mechanism at low temperature range. The dielectric loss in the range of low frequencies are predominantly of ionic nature with temperature increase. The peak of dielectric loss is the detrapping of the electrons which is were trapped in the localized level of the silicone oils at the frequency of 30 kHz. The increase of ionic conduction is attributed to the presence of ionizable oxidation products and their increased dissociation feature. The activation energy ${\Delta}H$ and dipole moment ${\mu}_d$ were increased whit increasing degree of polymerization.

전력케이블 접속재 XLPE/EPDM 계면의 부분방전 특성

조경순,홍진웅,Cho, Kyung-Soon,Hong, Jin-Woong 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.9

This paper describes the influence on partial discharge characteristics of defects at the model XLPE/EPDM interfaces of power cable joints. The defects of void and copper which could inadvertently be present at the joint interface. We measured ${\Phi}-n,\;{\Phi}-q$ patterns by a computer-aided partial discharge measuring system. Several parameters i, e, maximum discharge $q_{max}$ [pC], average discharge q [pC/cycle], and average angle of discharge ${\Theta}g$ [deg] were found to depend upon the defect type varying applied voltage. As the result of time evaluation, partial discharges are small different at copper defects, but is decreasing obviously about 20 minutes at void defect. It considered that difference of magnitude of total positive discharge of Q+ [pC] and total negative discharge of Q- [pC] is SPMD(swarming pulsive micro discharges).

K-means 클러스터링을 이용한 케이블 접속재 계면결함의 부분방전 분포 해석

조경순,홍진웅,Cho, Kyung-Soon,Hong, Jin-Woong 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.11

To investigate the influence of partial discharge(PD) distribution characteristics due to various defects on the power cable joints interface, we used the K-means clustering method. As the result of PD number(n) distribution analyzing on $\Phi-n$ graph, the phase angle($\Phi$) of cluster centroid shifted to $0^{\circ}\;and\;180^{\circ}$ increasing with applying voltage. It was confirmed that the PD quantify(q) and euclidean distance of centroid were increased with applying voltage from the centroid distribution analyzing of $\Phi-q$ plane. The dispersion degree was increased with calculated standard deviation of the $\Phi-q$ cluster centroid. The PD number and mean value on $\Phi-q$ graph were some different by electric field concentration with defect types.

점도변화에 따른 실리콘유의 전기전도특성

조경순,신종열,이충호,이수원,홍진웅 ( Kyung Soon Cho,Jong Yeol Shin,Chung Ho Lee,Soo Won Lee,Jin Woong Hong ) 한국전기전자재료학회 1997 전기전자재료학회논문지 Vol.10 No.9

제작방법에 따른 전력케이블용 폴리에틸렌 박막의 전기전도특성

조경순,이용우,이수원,홍진웅 ( Kyung Soon Cho,Yong Woo Lee,Soo Won Lee,Jin Woong Hong ) 한국전기전자재료학회 1997 전기전자재료학회논문지 Vol.10 No.5

Neural Network Model for Partial Discharge Pattern Analysis of XLPE/EPR Interface

조경순,Cho Kyung-Soon Korea Computer Institute Society 2005 컴퓨터産業敎育學會論文誌 Vol.6 No.2

최근 들어 우리나라에서는 설치의 간편성과 높은 신뢰도를 가진 전력케이블의 사용이 증가하고 있다. 전력케이블은 출고 전에 IEEE std. 404-1993 시험을 거쳐 안정성을 확인하고 있지만 포설시 발생하는 접속부 내부의 결함으로 인하여 많은 문제가 발생하고 있다. 특히 불순물 혼입 또는 공극 발생시 고장율은 증가하게 된다. 부분방전 검출은 포설 후 전력케이블의 상태를 관측할 수 있는 유용한 방법이다. 본 연구에서는 부분방전 특성을 평가하고자 케이블 접속재인 EPR과 케이블 절연체인 XPLE 사이에 인공 결함을 발생시킨 후 데이터 취득 시스템을 이용하여 $\Phi-q-n$ 특성을 검출하였으며, 부분방전의 정량적 해석을 위해 필요한 통계량을 계산하였으며, 신경망 모델을 적용하여 패턴 분석을 수행하여 $88\~96\%$의 구별이 가능하였다. The prefabricated type used generally in Korea to join cable runs on new installations or to repair broken Cable runs on existing installations, because installation is very simple and save time. This type is a permanent, shielded and submersible cable joint for direct burial or vault application. It confirms to the requirements of IEEE std. 404-1993 by factory testing, but many problems of insulated cable systems are caused by internal defects of the joint part which have to be mounted ensile. Faults arise from impurities or voids. A suitable solution for a monitoring of cable joints during the after-laying test and service is partial discharge detection. <중략> $\Phi-q-n$ properties were measured using detection impedance, high pass filter and computerized data acquisition system. Statistic Value like maximum charge, repetition rate, average charge, etc. are calculated. It is possible to quantitative analysis of $\Phi-q-n$ properties from this statistic value and pattern analysis.

Comarison of Major Constituents in Acanthopanax Taxa and Variety Cheongsong in Korea by GC-MS

조경순,구평태,허만규,Cho, Kyung-Soon,Ku, Pyung-Tae,Huh, Man-Kyu Korean Society of Life Science 2007 생명과학회지 Vol.17 No.5

Species of genus Acanthopanax(Araliaceae) are long-lived trees primarily distributed throughout East Asia. These species are regarded as medically and ecologically important in Korea. A variety of Cheongsong in Korea is one of these cultivated varieties, however this variety is much longer(>100 years) than those of other cultivated groups. The components of variety of Acanthopanax in Cheongsong were analyzed for the first time and were compared to those of all Acanthopanax taxa in Korea. Nineteen components were specific to variety in Cheongsong. The main components of this variety were $\beta$-caryophyllene, hexadecanoic acid and ethyl stearate. Although some components are differ from each other, variety Cheongsong was similar to A. senticosus at phonetic topology with content of the chemicals, In addition, six species of genus Acanthopanax were investigated to compare the major chemical components by GC-MS. 오갈피나무속 식물종은 주로 동아시아에 분포하는 다년생 목본류이다. 이 속의 식물 종은 한국에서 약 6종으로 알려져 있으며 일부 종은 약용으로 사용되어 경제적으로 매우 중요하다. 청송변종은 청송에서 100년 이상 재배되고 있는데 그 기원이 불분명하여 주요 생화학적 성분을 GC-MS로 분석하여 다른 종과 비교하였다. 분석한 화학성분 중 19개가 청송변종에 특이하였는데 $\beta$-caryophyllene, hexadecanoic acid, 그리고 ethyl stearate 등이다. 청송변종은 오갈피나무와 비록 일부 성분에 있어 차이가 나지만 전체적인 분류학적 위상에서 다른 종에 비해 가장 유사하여 오갈피나무에서 분지한 것으로 판단된다. 또 오갈피나무속 6종에 대한 성분 차이가 GC-MS로 잘 구분되어 화학성분에 의해 종간 차이가 있음이 밝혀졌다.

합성절연유의 전기전도특성

조경순,최봉철,이종필,이수원,신현택,홍진웅 ( Kyung Soon Cho,Bong Cheol Choi,Jong Pil Lee,Soo Won Lee,Hyun Taek Shin,Jong Woong Hong ) 한국전기전자재료학회 1997 한국전기전자재료학회 추계학술대회논문집 Vol.1997 No.1

부산지역 바이러스성 성병 감염양상 연구

조경순,나영란,조현철,이정희,정명주,Cho, Kyung-Soon,Na, Young-Ran,Joe, Hyeon-Cheol,Lee, Jung-Hee,Jung, Myung-Ju 한국미생물학회 2006 미생물학회지 Vol.42 No.3

항구 도시인 부산의 바이러스성 성병 감염 현황과 고위험군 지표로서 HPV, HSV 및 HBV 감염자의 성별, 연령대별 유형율 조사 등 기초자료를 확보하여 성매개감염증 사업관리 및 전파방지에 중요한 자료를 제공하고자 한다. 자궁경부도찰물 674건 중 HPV 23건(3.4%)과 HSV 1 2형 3건(0.4%) 9건(1.3%)이 각각 분리되었으며, 혈청 586건 중 HSV IgM 121건(3.6%), HSV-1 IgG 487건(83.1%), HSV-2 IgG 135건(23.0%), HBsAg 26건(4.4%), HBeAg 7건 (1.2%) 등이 검출되었다. HPV 유전자형별 분포도는 고위험군이 15종(13명), 저위험군이 6종(3명)으로 나타났으며, 복합감염은 7명이었다. 연령별 발생분포는 자궁경부도찰물의 경우 20대 이하가 24건(7.2%), 혈청의 경우 40대 이상이 101건(100%)으로 가장 높았다. 그리고 업소별 분포도는 자궁경부도찰물에서 보건소의 검진대상자(유흥업소종사자)들이 감염율이 가장 높았고, 혈청에서는 대용성병진료소의 검진대상자(특수업태부)가 감염율이 가장 높았다. This study was performed to evaluate the prevalence of high risk Human papilloma virus (HPV), Herpes simplex virus type 1, 2 (HSV-1,2), Hepatitis B virus (HBV) and Human Immuno deficiency virus (HIV) infection with sexual transmitted viral diseases in Busan during 2004 to 2005. six hundred seventy four samples of cervical swabs were tested for sexually transmitted viral diseases. Among the isolated viruses, 23 (3.4%) samples were HPV and 3 (0.4%) and 9 (1.3%) samples were HSV 1 and 2, respectively. Among the 586 serum samples tested for viruses, HSV IgM 121 (3.6%), HSV-1 IgG 487 (83.1%), HSV-2 IgG 135 (23.0%), HBsAg 26 (4.4%), HBeAg 7 (1.2%), and HIV (0%) types were found. HPV genotypes were detected in 16 patients, of which 13 cases were high risk type HPV, 3 cases were low risk type HPV, and multi infection were detected in 7 cases. In the age distribution of the patients, 7.2% of infection tested from cervical swabs occurred in under the age of 20, while 100% of infection was found to occur in those who were 40 years old or older in the serum samples. The outbreak pattern in their occupations was found to be the highest at the health organization (amusement quarter) for the cervical swabs, and at infirmary (commercial sex worker) for the serum samples, respectively.

최근 2년간 부산지역에서 급성호흡기 환자로부터 분리한 인플루엔자바이러스의 유행 양상

조경순,박선미,김성준,정명주,이주연,강춘,Cho, Kyung-Soon,Park, Sun-Mee,Kim, Seang-Joon,Jung, Myung-Ju,Lee, Joo-Yeon,Kang, Chun 한국미생물학회 2007 미생물학회지 Vol.43 No.3

2004년과 2005년 동안 부산지역에서 급성호흡기환자로부터 인플루엔자바이러스를 분리 동정하여 분식한 결과, 인플루엔자바이러스분리율은 2004년도는 1869건의 호흡기 검체 중 인플루엔자바이러스 154건 중, A/H3N2형은 77.3%에 해당하는 119건, B형의 경우 35건(22.7%)으로 나타났고 A/H1N1형은 검출되지 않았다. 분리된 인플루엔자바이러스의, 2005년의 경우 1579건의 호흡기 검체 중에서 분리된 인플루엔자바이러스 19건 중, A/H1N1형은 6건(31.6%) 검출되었으며, A/H3N2형은 52.6%에 해당하는 10건, B형의 경우는 3건(15.8%)으로 나타났다. 2005년의 경우 전체적인 인플루엔자바이러스 분리율은 2004년에 비해 떨어졌으나, A/H3N2의 경우 여전히 높은 분리율을 보였으며 2004년에는 전혀 검출되지 않았던 A/H1N1이 B형보다 많이 분리되었다. 부산지역에서 분리된 바이러스의 항원형을 분석한 결과 당해연도 백신주와 동일하거나 유사하였다. 연령별 발생 분포는 0-10세 이하에서 80-90%이상을 차지하였고, 남성에 비해 여성에서 약간 높은 분리율을 나타내었다. 월별 분리율은 2004년도는 4월, 2005년도는 2월이 가장 많이 분리되었다. 인플루엔자바이러스의 대유행 주기에 임박한 현 시점에서 지속적으로 인플루엔자유행예측조사로서 조기 분리한 인플루엔자바이러스 주를 유전자 염기서열을 분석함으로써 신종 인플루엔자바이러스가 출현되는지 적극적인 감시가 필요하다. The occurrence of acute respiratory infections caused by the influenza virus are particularly high during the winter season in Busan, Korea. In 2004 and 2005, a study of the rate of occurrences of the influenza virus was conducted. The results reveal that in 2004, of the 1,869 people with an acute respiratory infection that 154 (8.2%) people were infected by the influenza virus. In 2005, of the 1,579 people infected with an acute respiratory infection that 19 people (1.2%) were infected with the influenza virus. The study shows a decrease in the numbers of an influenza virus infection from 2004 to 2005. Data was collected by inspecting throat swabs and nasal discharge from those with an acute respiratory infection. Further inspection of the throat swab and nasal discharge from the infected individuals during 2004 and 2005 study show the occurrence of the different types of influenza virus in the population: 6 cases (3.5%) of influenza type A/H1N1, 129 cases (74.5%) of A/H3N2, and 38 cases (22.0%) of type B. The study conducted in 2004 and 2005 reveal that children between the ages of two and five were more likely to be infected than any other age group. In the study, about 62.2% of the infected individuals were between two and five years old. The detection rates between males and females are similar. However, it is notable that females are slightly more likely to develop an acute respiratory infection caused by the influence virus compared to their male counterparts.