• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2011년도 하계학술대회
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• pp.393-395
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• 2011

본 논문에서는 모바일 통신 방송 융합분야는 세계 각국이 서로 상이한 표준을 가지고 있어 해외 시장 진출 시 제품 신뢰성 확보를 위한 해외 현지에서의 테스트가 중요시 되어서 국내 기업의 테스트 비용과 개발기간 면에서 경쟁력 확보의 악재로 작용하고 있다. 따라서 모바일 통신 방송의 세게 각 국 표준의 테스트 인프라를 확보하고 이를 활용하는 테스트의 전반적인 시스템을 구축하여 국내 기업의 테스트 비용 절감 및 개발기간 단축과 다양한 서비스 개발이 가능하다.

• 전력전자학회논문지
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• 제19권6호
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• pp.494-502
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• 2014

This paper presents a control method of the modular multilevel converter - high-voltage direct current (MMC-HVDC) system to regulate grid voltage on the basis of the Jeju Island power system. In this case, the MMC-HVDC system is controlled as a static synchronous compensator (Statcom) to exchange the reactive power with the power grid. The operation of the MMC-HVDC system is verified by using the PSCAD/EMTDC simulation program. The Jeju Island power system is first established on the basis of the parameters and measured data from the real Jeju Island power system. This power system consists of two line-commutated converter - high-voltage direct current (LCC-HVDC) systems, two Statcom systems, wind farms, thermal power plants, transformers, and transmission and distribution lines. The proposed control method is then applied by replacing one LCC-HVDC system with a MMC-HVDC system. Simulation results with and without using the MMC-HVDC system are compared to evaluate the effectiveness of the control method.

• Journal of Microbiology and Biotechnology
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• 제21권3호
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• pp.263-266
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• 2011

Methylelaiophylin isolated from Streptomyces melanosporofaciens was selected as an ${\alpha}$-glucosidase inhibitor with an $IC_{50}$ value of 10 ${\mu}M$. It showed mixed-type inhibition of ${\alpha}$-glucosidase with a $K_i$ value of 5.94 ${\mu}M$. In addition, methylelaiophylin inhibited the intracellular trafficking of hemagglutinin-neuramidase (HN), a glycoprotein of Newcastle disease virus (NDV), in baby hamster kidney (BHK) cells. Methylelaiophylin inhibited the cell surface expression of NDV-HN glycoprotein without significantly affecting HN glycoprotein synthesis in NDV-infected BHK cells.

• 아태비즈니스연구
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• 제15권1호
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• pp.305-318
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• 2024

Purpose - The purpose of this study was to conduct a preliminary study to identify key trends on research articles indexed in KCI in relation to tourism in Jeju and sports tourism. Design/methodology/approach - Information regarding research articles focused on Jeju tourism and sports tourism indexed in KCI (145 and 120 articles respectively) were collected and finally abstract written in Korean of 100 and 91 articles on sports tourism and Jeju tourism respectively were chosen for the further analysis after removing redundant articles. R program was used to analyze keyword frequencies, co-occurring terms, and degree/betweeness centrality measures and visualize the keyword network results. Findings - Event, marketing, content, program, implication, service, stadium, and tourism destination have been identified as keywords with highest frequencies among research on sport tourism, whereas tourism destination, image, brand, content, data, Chinese, satisfaction, eco-tourism service, place of arrival were highly appearing terms among research on Jeju tourism. Research implications or Originality - This study highlighted that Jeju has been interlinked with a range of terms such as programs influencing Jeju tourism, natural environment, tourism-related resources (e.g., museums, dramas, etc.), whereas sports has been closely related to sports event and vaiours types of sports (e.g., bicycle, staking, and scuber), but not to Jeju-do.

• 동아시아식생활학회지
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• 제19권2호
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• pp.187-194
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• 2009

한국산 쪽파의 품질 향상을 위해 7개 지역의 쪽파 종구로 재배된 쪽파에 대한 이화학적 특성 분석을 실시하였다. 일반 성분 분석 결과, 쪽파의 수분 함량은 예천 쪽파, 조단백 함량은 제주도 쪽파, 조지방 함량은 예천 쪽파의 함량이 가장 높게 나타났다. 조회분 함량은 중국 쪽파가 가장 높았고, 환원당 함량은 덕적도 쪽파의 함량이 가장 높게 나타나 유의적 차이를 나타냈는데, 총당 함량은 0.36~0.41% 수준으로 유의적 차이가 없었다. 줄기 부분에 대한 경도는 시료 간에 유의적 차이가 없었고, 잎의 경도는 예천 쪽파가 가장 높았다. 수소공여능은 예산 > 중국 > 무안 > 예천 > 제주도 > 안면도 > 덕적도의 순으로 나타났다. 무기질은 K, Ca, P, Mg, Na 등 의 순으로 함량이 감소하였고, 특히 예산 종구로 재배된 쪽파의 함량이 높은 것으로 나타났다. 쪽파의 구성 아미노산은 18종 중 17종이 분석되었으며, 이중 glutamic acid의 함량이 가장 많았다. 매운맛을 나타내는 pyruvic acid 함량은 제주도 종구 재배 쪽파가 가장 높았고, 중국산 종구 재배 쪽파가 가장 낮게 나타났다. 이와 같은 결과로 종구산지가 다른 7가지 쪽파의 이화학적 특성은 유의적 차이가 있는 것으로 확인되었으며, 국내산 쪽파 및 종구의 품질향상을 위해 종구에 따른 국내산 쪽파의 생리활성에 대해서 더 깊은 연구가 필요하다고 사료된다.

• 식물분류학회지
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• 제38권4호
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• pp.565-571
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• 2008

미발굴 한반도 고유 식물자원의 발굴 관리를 위한 연구 조사 과정 중 국내 분포가 명확하지 않거나 극히 한정되어 있는 4종 식물의 신분포지가 확인되었다. 제주도 인근에서 자라는 난대 양치식물인 새깃아재비와 부생난인 으름난초가 전남 함평군 감방산과 전남 보성군 까치봉에서 각각 발견되었다. 전남지방에 분포하는 것으로 알려진 입술망초가 광주시 무등산에서 확인되었으며, 제주도와 울릉도에 자라는 분단나무가 강원도 강릉시 자병산에서 확인되었다.

• 한국의상디자인학회지
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• 제17권4호
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• pp.145-160
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• 2015

The purpose of this study is to develop cultural tourism products of Jeju Free International City, utilizing the images of its blessed natural environment listed on the UNESCO World (Natural) Heritage Site. To do this, the concept of cultural tourism products is defined, and the current situation and features of Jeju cultural tourism products are closely researched and examined, and then through survey study, responded by Jeju residents and tourists, purchasing behaviors, consumer preferences of Jeju tourists, and improvement plans for tourism products are examined in detail. According to the survey, the important elements for cultural tourism products of Jeju are extracted and employed in the development of tourism T-shirts, and the developing process of souvenir shirt designs using the unique images of Jeju are presented. Five textile pattern designs, based on the nature images of Jeju 'gotjawal' forests, are created and employed in 5 souvenir shirt designs, and this led to the development of 10 styles of tourism souvenir shirts. With their trendy design embodying unique images of Jeju, practicality, and functionality, these shirts are not just for tourists visiting Jeju but also for everybody, any age, and anywhere. The suitability and validity of the designs as the cultural tourism products representing Jeju are evaluated by consumer preference survey. Through this study, the infinite possibility of developing cultural tourism products utilizing unique natural environments of Jeju are confirmed. Development of tourism souvenir shirts reflecting the current fashion trends and tourists' tastes can be led to the construction of positive images of Jeju, the success in attracting tourists, and, eventually, market extension for cultural tourism products.

• Journal of Microbiology
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• 제42권4호
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• pp.292-298
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• 2004

This study reports, for the first time, the ivestigation of the distribution of Korean saxicolous lichens in the coastal rocks of U-do islet, which is known as an unpolluted zone in Jeju. More than thirty lichens were obtained and investigated from the coastal rocks frequently contacted by seawater. A molecular analysis using PCR amplification of the rRNA ITS regions revealed the coastal rock lichens could be placed into 8 families and 14 genera, Ramalinaceae (Bacidia, Ramalina), Physciaceae (Buellia, Dirinaria, Phaeophyscia, Physcia, Pyxine), Lecanoraceae (Candelaria, Lecanora), Parmeliaceae (Xan­thopannelia), Graphidaceae (Graphis), Pertusariaceae (Pertusaria), Rhizocarpaceae (Rhizocarpon), and Teloschistaceae (Caloplaca), showing a diversity of lichens, with foliose (flat leaf-like), crustose (crust­like), and fruticose (miniature shrub-like) life forms might be distributed in the coastal rocks. These findings suggested the possibility that the lichens identified in the present work might be resistant to a salty environment.

• 한국동물위생학회지
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• 제23권1호
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• pp.93-102
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• 2000

In this experiment, we studied the sero-positive rate of akabane virus in cattle from Jeju-do and analyzed the seroepidemiological features. In an analysis of 1,051 samples, the positive rate for neutralizing antibody in sera collected in nine regions on Jeju-do was 56.7%. The rate varied with the region. The positive rate was 69.6% in Aewol, 63.1% in Jeju city, 54.4% in Anduck, 51.0% in Hallim, 69.8% in Jocheun, 47.6% in Pyosun, 40% in Daejeong, 30.0% in Harkyung, 71.6% in Namwon, 24.5% in Sungsan, 133.,3% in Seokypo and 44.5% in Gujwa, respectively The rate also depended on the age of the cattle. The positive rate was 67.2% in calves 0- to 12-month old, 48.3% in cattle 13- to 24-month old, 65.4% in cattle 25- to 36-month old, and 65.4% in cattle more than ,B7 months old. To isolate the virus from calves with malformations including arthrogryposis and hydranencephaly, cerebral homogenates were inoculated into Vero cells, which were determined for cytopathic effect (CPE). Vero cells with CPE were examined for Akabane virus using an electron microscope (EM) and indirect immunofluorescent antibody test (EM). Typical virus particles with a width of 90-130nm and specific immunofluorescence in the cytoplasm of infected cells were sought for identification.

• The Korean Journal of Ecology
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• 제7권2호
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• pp.67-73
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• 1983

Jeju-Do is a volcanic island of which climate is very warm and humid, but Opuntia lanceolata Haw, showing CAM metabolism is growing at Wolyung-Ri, Hanrim-Eup, Jeju-Do. Annual productivity of Opuntia was 696.47g/m2/yr and 533.47g/m2/yr at two populations on the seashore respectively and 414.92g/m2/yr on the basalt wall of a village. Stem area index was 13.74, 6.93, and 9.30 at each population which are higher values than average range of leaf area index. The standing crop was the highest at the second cladode from the cladode showed little difference at most chemical properties of P, K, Ca and Na. Total nitrogen contents were the most at the youngest cladode and the lest at the oldest one. Soils were infertile of which organic contents were 1.5% and 5.0% on the seaside and the basalt wall respectively. The soil on the basalt wall contained little water whose water contents were 0.9% and at seashore population 15.12% of water contents were. Furthermore high exchangeable Na contents in soil added waer deficiency.