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제주 서광지역에 대한 풍력에너지의 장기간 (10년) 특성
고경남(Ko Kyung-Nam),김경보(Kim Kyoung-Bo),허종철(Huh Jong-Chul) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.3
In order to clarify characteristics of variation in wind energy over a long-term period, an investigation was carried out at Seoguang site on Jeju island. The wind data for 10 years from Automatic Weather System (A WS) were analyzed for each year. The variation in the annual energy production (AEP) for the 2 ㎿ wind turbine was estimated through statistical work. The result shows that the range of the yearly average wind speed at 15 m above ground level for 10 years was from -22.6% to +13.7%, which is wider range than that in Japan. The coefficient of variation for the AEP was 22.7%, which is about twice of that for the yearly average wind speed. Therefore, for estimating the wind energy potential accurately at a given site, the wind data should he analyzed over a long-term period based on the data from the meteorological station.
2004-2006년에 발생한 제주지역의 낙뢰 특성 및 풍력발전기에 미치는 낙뢰의 영향
고경남(Ko Kyung-Nam),김경보(Kim Kyoung-Bo),허종철(Huh Jong-Chul) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.1
This paper presents the characteristics of lightning over Jeju island and a case of emergency stop of a wind turbine due to lightning. Using the IMPACT ESP sensor to detect lightning, the data on lightning frequency, lightning strength, regional lightning event were obtained and analyzed in detail. The measurement period was for 3 years from 2004 to 2006. As a result, lightning occurred the most frequently in July and August. As for lightning strength, lightning with grades -4 to -6 and +3 to +5 occurred more frequently. The eastern part of Jeju island had much more lightning frequency compared with the western part of it. Lightning with high grade occurred mainly in offshore site and the coastal region. Furthermore, the data on wind turbine stop caused by lightning was analyzed. Although wind turbine lightning damage was not much in this study, the investigation on lightning damage or lightning faults to a wind turbine should be conducted in Korea to increase availability of wind turbine.
Pelargonium peltatum 분비모의 미세구조 연구
조범석,고경남,김은수,Cho, Bum-Suk,Ko, Kyoung-Nam,Kim, Eun-Soo 한국현미경학회 1999 Applied microscopy Vol.29 No.1
제라늄(Polargonium peltatum) 분비모의 미세구조를 광학현미경과 주사전자현미경을 사용하여 살펴보았다. Pelargonium peltatum의 분비모는 형태와 크기에 따라 short-stalked capitate glands (Type I)와 long-stalked capitate glands (Type II)의 두 가지 종류로 구분할 수 있었다. 두 종류의 분비모는 모두 배축면의 엽백과 엽병에 많이 분포하였다. 분비모는 1개의 분비세포, 3개의 병세포, 1개의 기부 세포로 이루어져 있었으며, 분비세포는 다수의 활면소포체와 색소체, 액포, 골지장치, 미토콘드리아 등을 가지고 있었다. 분비세포의 액포 내에서는 전자밀도가 높은 물질이 자주 관찰되었는데, 이들은 분비모의 주된 분비전구물질인 phenolic compound인 것으로 사료된다. The ultrastructure of glandular trichomes in Pelargonium peltatum has been studied with a light microscope, transmission, and scanning electron microscope. Two types of the glands, long-stalked and short-stalked capitate glands, are distinguished with their shape and size of the total glands. Both glands are extreamly abundant in the leaf veins and petioles. These glandular trichomes are consisted of one secretory cell, three stalk cells, and one basal cell. The secretory cells contain a large amount of smooth endoplasmic reticulum. They have also much plastids, vacuoles, Golgi apparati, and mitochondria. High electron-dense deposits are frequently present in vacuoles of secretory cells. It seems to be phenolic compounds which is thought as the major secretory precursors.
생리혈내 탈락된 자궁내막세포의 유착력에 관한 연구: 자궁내막증의 병인 연구를 위한 실험 모델
궁미경(Mi Kyoung Koong),전진현(Jin Hyun Jun),김은수(Eun Soo Kim),고경남(Kyoung Nam Ko),홍수정(Soo Jeong Hong),송지홍(Ji Hong Song),유근재(Keun Jai Yoo),강인수(Inn Soo Kang) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.12
목적: 자궁내막증의 원인은 아직도 잘 밝혀지지 않았으나, 역류된 자궁내막세포 및 조직이 복강 내로 전이, 착상되어 형성된다는 가설이 지배적이다. 그러나, 실제적으로 복강 내에서 어떤 과정에 의해 자궁내막세포 및 조직이 복막에 유착되고 침윤되어 병변이 발생되는 가에 관하여서는 알려지지 않았다. 따라서 본 연구에서는 양막을 이용하여 생리혈에 존재하는 탈락된 자궁내막조직이 상피층에 유착될 수 있는 가를 알아보고자 하였다. 연구방법: 정상적인 생리주기를 갖는 20명의 여성으로부터 생리주기 제2일이나 제3일에 자궁으로부터 Wallace catheter를 통해 흘러나오는 생리혈을 채취하였다. 양막은 합병증이 없는 만삭분만시의 태반으로부터 채취, 분리하여 사용하였다. 채취된 생리혈은 Ham's F-10 배양액으로 2회 세척한 후 준비된 양막조각 위에서 배양액과 함께 5일간 배양하였다. 그 후 양막에 자궁내막조직이 유착된 부위를 해부현미경 하에서 관찰하였고, 유착부위가 관찰되면 이를 고정하여 조직절편으로 만들어 염색, 관찰하였다. 결과: 생리혈에 존재하는 자궁내막조직의 유착부위는 양막의 세포외 기질층 뿐 아니라 상피층 모두에서 관찰되었다. 유착부위의 크기는 매우 다양하여 현미경적 크기부터 육안 확인 가능한 크기까지 관찰되었다. 결론: 생리혈에 존재하는 자궁내막조직은 이미 탈락되었음에도 불구하고 유착력을 가지고 있으며, 이러한 유착력은 자궁내막증을 일으키는 데 관여할 것으로 사료된다. Objectives: The purpose of this study was to determine whether or not the shed endometrial tissues in menstrual fluid (MF) have adhesive potentials, using human amniotic membrane (AM). Methods: The MF from 20 patients with regular menstruation was collected with Wallace catheter by aspiration from the uterine cavity on the second or third day of the menstrual period. The AM was obtained from the placenta of term delivery without any complication. The MF was washed and diluted fivefold with Hams F-10 medium supplemented with 10% fetal bovine serum. The cell suspension was placed on either epithelial layer (EP) or extracellular matrix layer (ECM) of the AM. After 5 days of culture, the adhesion sites were observed under a stereomicroscope. For histological observation, each cultured AM was prepared for the serial paraffin section. Results: The adhesion sites of endometrial tissues in MF were found both ECM (20/20) and EP (11/20) of the AM. The size of adhesion sites in each AM were highly variable from microscopic to macroscopic size. Conclusion: We found that the shed endometrial tissues in MF have adhesive potential to epithelial layer in addition to extracellular matrix layer of amniotic membrane. This adhesive potential may be related to pathogenesis of endometriosis. We suggest that this culture system can be useful as an in-vitro model for endometriosis.
기상청 MOS 예측값 적용을 통한 풍력 발전량 예측 타당성 연구
김경보(Kim Kyoung-Bo),박윤호(Park Yun-Ho),박정근(Park Jeong-Keun),고경남(Ko Kyung-Nam),허종철(Huh Jong-Chul) 한국태양에너지학회 2010 한국태양에너지학회 논문집 Vol.30 No.2
In this paper the feasibility of wind power forecasting from MOS (Model Output Statistics) was evaluated at Gosan area in Jeju during February to October in 2008. The observed wind data from wind turbine was compared with 24 hours and 48 hours forecasting wind data from MOS predicting. Coefficient of determination of measured wind speed from wind turbine and 24 hours forecasting from MOS was around 0.53 and 48 hours was around 0.30. These determination factors were increased to 0.65 from 0.53 and 0.35 from 0.30, respectively, when it comes to the prevailing wind direction(300°~60°). Wind power forecasting ratio in 24 hours of MOS showed a value of 0.81 within 70% confidence interval and it also showed 0.65 in 80% confidence interval. It is suggested that the additional study of weather conditions be carried out when large error happened in MOS forecasting.
제주지역의 낙뢰 발생 특성 및 풍력발전기의 피해사례 분석
김경보(Kim Kyoung-Bo),고경남(Ko Kyung-Nam),허종철(Huh Jong-Chul) 한국태양에너지학회 2007 한국태양에너지학회 학술대회논문집 Vol.- No.-
This paper presents the characteristics of lightning around Jeju island and the damage case in Hangwon wind farm. The data of lightning obtained by IMPACT, which is the sensor to detect the lightning, was analyzed in detail. The measurement period was for 3 years from 2004 to 2006. The results show that lightning occurs more frequently in hours of 11 ~ 13, and most frequently in summer. As for the lightning strength, the lightning of the grade -5 to -7 occurred most frequently. The lightning with high grade mainly occurred the northeastern coast, the western coast, the south coast and the western mountain region. Also, the wind turbine stop due to the lightning was analyzed according to the time series and the lightning strength in this paper.