• 한국수산학회:학술대회논문집
• /
• 한국수산학회 2005년도 춘계학술대회
• /
• pp.184-185
• /
• 2005

• 한국태양에너지학회 논문집
• /
• 제26권2호
• /
• pp.53-59
• /
• 2006

The number of wind generation installations are growing substantially in Jeju, Korea. Many of these installations are significant in size and directly connected to the distribution system. Utility grid interconnection standards for interconnecting non-utility distributed generation systems are essential to both power system company and generation company. These interconnection standards are important to utilities, customers, wind generation manufactures and nation. In this paper, it is investigated the voltage quality and the suitability of Jeju-Hangwon wind power generation farm by network interconnection technology standard.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2004년도 하계학술대회 논문집 A
• /
• pp.236-238
• /
• 2004

In recent years wind turbine technology has undergone the rapid development in response to the demands for increased use of renewable sources of energy. Using wind turbines for production of electrical energy requires reliable operation. The increased share of wind power in electrical system makes it necessary to have grid-friendly interfaces between the wind turbines and the grid in order to maintain power quality. Increasingly wind turbines are being connected into electricity distribution system. The grid-connected wind power stations have many impacts on power systems such as voltage variations, harmonics. The paper investigates the influences of grid-connected wind power generation system on substation bus voltage.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2008년도 제39회 하계학술대회
• /
• pp.275-276
• /
• 2008

Construction of wind power plant is rapidly increasing since Jeju is known as the most suitable regarding wind power plants in Korea. But implementing wind power generation inevitably introduces new challenges due to its intermittent nature. In the paper, it is introduced the prospect of wind plant construction and influence analysis in Jeju power system.

• 대한간호학회지
• /
• 제33권4호
• /
• pp.503-509
• /
• 2003

Purpose. The purpose of this study was to survey the prevalence rate of cognitive impairments and to identify the factors influencing cognitive impairment in the elderly in rural communities of Jeju Province. Methods. 590 elderly in 6 rural communities of Jeju Province were interviewed, using a questionnaire consisting of sociodemographic characteristics, health behavior, quality of life, and MMSE-K Results. Prevalence of cognitive impairment was 33.1 % (39.1 % of females, 16.76% of males). Prevalence of dementia was 12.4% (16.3% of females, 2.87% of males). Factors related to cognitive impairment were age, sex, education, standard of living, employment status, and subjective health state. Conclusions. In community health care for the elderly, factors relating to cognitive impairment have to be considered. When planning community health care, priority should be given to the elderly; who need care but live alone; who lack social support; who have a low standard of living; who experience discomfort in the activities of daily living; who believe they are not in a good state of health; or whose life satisfaction is low.

• Animal cells and systems
• /
• 제11권2호
• /
• pp.147-153
• /
• 2007

DNA extracted from ancient bones of Cervidae animals was examined to identify the species and to determine the phylogenetic relationships to those from extant cervids. Abundant ancient bones were excavated from Kumsung archaeological site in Jeju Island, Korea, and were identified as Cervidae animals based on morphological features of their antlers and lower mandibles. Their mitochondrial DNA (mtDNA) control region (CR) was partially sequenced and subsequently compared with those previously reported in database. The results confirmed that the ancient sequences are lineage of Cervidae. On the phylogenetic trees constructed using the sequence diversity of the CR sequences of family Cervidae, the ancient DNA sequences were found on distinct clusters. The ancient sequences were located in the subfamily Capreolinae cluster, and six ancient sequences were closely related to those of extant Korean roe deer in Jeju Island and Korean Peninsula. Consequently, the results of this study suggest that the roe deer inhabited Jeju Island in ancient times. However, there is no evidence for the existence of subfamily Cervinae, including Sika deer, while it has been described in several historical records. The results suggest that this finding could contribute to understanding of the origin and phylogenetic relationships of extant and ancient roe deer on Jeju Island.

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2005년도 춘계 학술발표대회
• /
• pp.146-146
• /
• 2005

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2004년도 춘계 학술대회지
• /
• pp.142-143
• /
• 2004

• 한국콘텐츠학회:학술대회논문집
• /
• 한국콘텐츠학회 2006년도 추계 종합학술대회 논문집
• /
• pp.172-175
• /
• 2006

"하멜"은 제주와 조선을 유럽에 최초로 알린 인물이라는 학술적 가치를 가지고 있지만, 도서를 제외한 디지털 콘텐츠의 개발은 전무한 상태이다. 본 논문에서는 이러한 "하멜" 캐릭터를 이용하고 제주의 문화를 소재로 하여, PDA의 장점인 휴대성, 멀티미디어 이용 등을 바탕으로 한 교육용 게임 콘텐츠를 제작하였다. 원시적인 점수 쌓기 게임 형식에서 탈피하여 게임 공간과 "하멜" 캐릭터의 인터렉션에 따른 다양한 시나리오를 가지는 형태로, 지역문화와 사이버 공간을 접목시키는 디지털 스토리텔링의 구조를 띈다. 게임을 통해 학습을 하는 방법에 있어 제주 특유의 문화 콘텐츠를 활용한 퀴즈, 십자 퍼즐, 순서 맞추기, 틀린 그림 맞추기, 조각 퍼즐 등의 게임을 이용하였다. 이러한 콘텐츠들은 각기 모듈화된 설계를 통해 각각의 모듈이 독립적 역할을 수행하여 약간의 조정만으로도 제주 외의 다른 지역의 콘텐츠를 이용하여 시리즈 형식의 무한한 게임 콘텐츠 제작이 가능하도록 설계하였다.

• Preventive Nutrition and Food Science
• /
• 제11권1호
• /
• pp.17-24
• /
• 2006

Methanolic and aqueous extracts from 37 seaweed species (10 green and 27 brown seaweeds) collected from Jeju Island coast were prepared at high ($70^{\circ}C$) and room ($20^{\circ}C$) temperatures and examined for cytotoxic activity against 4 tumor cell lines: U937 (human monoblastoid leukemia cell line), HL60 (human promyelocytic leukemia cell line), HeLa (woman cervical carcinoma cell line) and CT26 (mouse colon carcinoma line). Both MeOH extracts of Desmarestia tabacoides and Dictyota dichotoma possessed strong cytotoxic activities against all the tumor cell lines tested, but the aqueous extract exhibited no activity. On the other hand Ecklonia cava showed strong cytotoxic activities for the $20^{\circ}C$ aqueous extract against the three tumor cells except HeLa cell. Sagassum coreanum and Sagassum siliquastrum $20^{\circ}C$ aqueous extracts also exhibited strong cytotoxic activities against U937, HL60, HeLa cells. Even though green seaweeds showed less activity than brown seaweeds, $20^{\circ}C$ aqueous extracts of Codium contractum and Codium fragile exhibited strong cytotoxic activities against HL60 or CT26 cells, respectively.