• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.460-464
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• 2009

This study investigates the wake effect of an island to develop the offshore wind farm. The main wind direction can be determined from the data processing of the QuikSCAT satellite data around the Wi-do island at south-west sea of the Korean peninsula. Computational fluid dynamics is adopted to analyze the wake effect. From this study the velocity defects due to the wake are revealed. In particular about 5% velocity defect is observed at 80m hub height from the sea surface.

• 대기
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• 제29권4호
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• pp.381-390
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• 2019

This study investigates the impacts of urban land-use fraction and temperature advection on the urban heat island intensity over the Seoul metropolitan area using the UM (Unified Model) with the MORUSES (Met Office Reading Urban Surface Exchange Scheme) during the heat wave over the region from 2 to 8, August 2016. Two simulations are performed with two different land-use type, the urban (urban simulation) and the urban surfaces replaced with grass (rural simulation), in order to calculate the urban heat island intensity defined as the 1.5-m temperature difference between the urban and the rural simulations. The land-use type for the urban simulation is obtained from Korea Ministry of Environment (2007) land-use data after it is converted into the types used in the UM. It is found that the urban heat island intensity over high urban-fraction regions in the metropolitan area is as large as 1℃ in daytime and 3.2℃ in nighttime, i.e., the effects of urban heat island is much larger for night than day. It is also found that the magnitude of urban heat island intensity increases linearly with urban land-use fraction. Spatially, the estimated the urban heat island intensities are systematically larger in the downwind regions of the metropolitan area than in the upwind area due to the effects of temperature advection. Results of this study indicate that urban surface fraction in the city area and temperature advection play a key role in determining the spatial distribution and magnitude of urban heat island intensity.

• 한국동물학회:학술대회논문집
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• 한국동물학회 2003년도 한국생물과학협회 학술발표대회
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• pp.132.1-132
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• 2003

No Abstract, See Full Text

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2003년도 제40회 국제학술심포지움
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• pp.70-70
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• 2003

• Journal of Ecology and Environment
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• 제41권6호
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• pp.173-181
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• 2017

Background: This study was undertaken to analyze the distribution and ecological characteristics of invasive alien plant species on Jeju Island, and to provide basic data for their management and control. Results: A field research was conducted at 436 locations on Jeju Island. The field research identified nine species of invasive alien species growing on Jeju Island. Based on the distribution pattern, Hypochaeris radicata L., Rumex acetosella, and Ambrosia artemisiifolia L. were found to be distributed horizontally throughout Jeju Island, with vertical growth in two or more vegetation zones, from warm temperate to the subalpine zone. Widely distributed species penetrate various habitats, such as grasslands, ranches, roadsides, farmlands, and empty lots, and have an immensely negative impact on the ecosystem, including declining biodiversity on Jeju Island. Paspalum distichum var. indutum Shinners, Paspalum distichum L., Solanum carolinense L., and Aster pilosus Willd. were distributed in some areas as a biased distribution species, whereas Lactuca scariola L. and Solidago altissima L. were found only in certain areas as centralized distribution species. Conclusions: The centralized distribution species and biased distribution species of the invasive plants in the ecosystem of Jeju Island should be physically eliminated, keeping in mind the short- and mid-term perspectives and monitoring, and by considering expansion of additional distribution areas. Due to limitations of physical/chemical elimination, time, and cost, widely distributed species require to be eliminated and managed, mainly to restore the integrity of the ecosystem, by planting native species to reestablish the habitat.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제34권4호
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• pp.250-257
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• 2023

Objectives: Adolescents are at risk of suicide. As suicide is a multifactorial process, risk and protective factors are relevant constructs for suicide prediction. This study explored the effects of risk and protective factors on suicidal ideation in adolescents on the island of São Miguel (Azores). Methods: A sample of 750 adolescents (male: n=358; 47.7%; mean age=14.67 years; standard deviation=1.85 years) from the island of São Miguel (Azores) completed several measures related to suicidal ideation and associated factors. Using a cross-sectional design, this study conducted descriptive, correlational, predictive, mediation, and moderation analyses. Results: Adolescents generally displayed high levels of risk and protective factors; an indicative proportion exhibited significant suicidal ideation with females presenting the greatest vulnerability. Furthermore, the results highlight that depression is the best predictor of suicidal ideation, however, the association between these variables is mediated. Conclusion: The data corroborate that the suicidal reality of adolescents in the Autonomous Region of the Azores is worrisome. Having substantiated the complexity of the suicidal context in young people in the present research, the need to continue studying risk/protective factors in this area is supported.

• 식물분류학회지
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• 제51권3호
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• pp.198-204
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• 2021

고들빼기속에 속하는 홍도산 홍도고들빼기의 학명은 이고들빼기와 절영풀의 잡종인 Crepidiastrum ×nakaii로 기록되어 왔다. 홍도 식물상을 조사하는 과정에서 홍도고들빼기의 분류학적 실체를 재검토하였다. 이를 위해 홍도고들빼기의 형태적 특징과 지리적 분포 및 internal transcribed spacer (ITS) 염기서열을 고들빼기속 근연종들과 비교하였다. 형태적 특성 조사에서, 홍도고들빼기는 짧고 굵은 아관목성 줄기와 8개의 내총포편 및 10 내지 12개의 소화수를 갖는 점에서 갯고들빼기와 유사한 반면, 개화기에 시드는 뿌리잎과 막질로 예 거치인 줄기잎 및 부리가 있는 수과 형태 등에서는 이고들빼기와 유사하였다. 한편 이고들빼기와 갯고들빼기는 홍도와 인근 섬 지역에 자라지만, 절영풀은 분포하지 않는다. 이러한 형태 및 분포 조사결과, 홍도고들빼기의 학명은 이고들빼기와 절영풀의 잡종인 C. ×nakaii가 아니라, 이고들빼기와 갯고들빼기의 잡종인 C. ×muratagenii로 판단된다. 하지만, ITS 염기서열은 조사된 종들을 구별할 수 있는 해상력을 보여주지 못하였다.

• Mycobiology
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• 제37권2호
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• pp.147-151
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• 2009

The wood-rotting fungi of three Korean islands in the Yellow Sea, Soyeonpyung-do (SY), Oeyeon-do (OY), and Gageo-do (GG), were investigated from October 2004 to November 2005. During four sampling trips on each island, a total of 46, 44, and 44 specimens were collected from SY, OY, and GG, respectively. The identified wood-rotting fungi from SY included 29 species of 22 genera and nine families; OY had 31 species of 26 genera and 10 families; and GG had 34 species of 27 genera and 11 families. The majority of the fungi were in the Polyporaceae, which was represented by 23 genera and 30 species. Auricularia polytricha, Daedaleopsis tricolor, Daldinia concentrica, Hymenochaete cinnamomea, Hymenochaete yasudai, Hyphoderma setigerum, Lopharia mirabilis, Schizopora paradoxa, and Trametes versicolor were collected from all three islands.

• 한국어류학회지
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• 제22권4호
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• pp.256-266
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• 2010

2009년 5월부터 8월까지 한국 남해안의 여수~통영 연안역에서 멸치 난자치어 분포특성에 대해 조사하였다. 멸치 난의 밀도는 6월에 가장 높았고, 자치어는 7월에 높게 나타났으며 주 분포해역은 나로도, 남해도 및 사량도 주변해역에서 수온 $19.0{\sim}24.0^{\circ}C$, 염분 33.0~34.4 psu, 용존 산소 6.05~8.13 mg/L, 클로로필 a $1.2{\sim}2.3{\mu}g/L$ 범위에 분포밀도가 높게 나타났다. 수온은 외해역보다 연안역에서 고수온을 나타냈고, 염분은 연안역에서 낮고 외해역에서 높게 나타났으며 연안수의 유입은 조사해역 북쪽의 여자만, 가막만, 광양만 등지에서 유입되고, 외해수의 연안유입은 나로도 및 매물도 남쪽 외해측에서 유입되는 것으로 조사되었다. 여름철 국지적 강우에 따른 다량의 섬진강 하천수 유입은 주변해역의 염분을 감소시키면서 남쪽해역으로 확장되어 산란 및 부화된 난자치어들을 외해역 내지 다른 해역으로 이송시키는 요인으로 판단된다. 발생 초기 난들은 (I~IV) 나로도, 돌산도 및 남해도 주변 해역에 주로 분포한 반면, 발생 후기 난은 (V~IX) 욕지도 및 매물도 주변해역에서 고밀도로 분포하였고, 부화직전 후기 단계의 난과 자치어 대형개체들은 조사해역 동쪽방향으로 갈수록 출현율이 높게 나타났다.

• KIEAE Journal
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• 제11권5호
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• pp.13-18
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• 2011

The overall aim of this study is to mitigate urban environmental problems. In particular, to reduce the effects of urban heat island phenomenon which is one of the urban planning perspective. This study focused on the analysis of the relationship between the urban heat island effect and the thermal and wind properties. To do this analysis, water space was virtually made at Yeol_Mae village Apt. Because it is very difficult to set up water space for the existing apartment complexes due to realistic constraints. This study, therefore has a strong sort of guidelines to create water space for newly formed city. It was based on the concept of virtual city through an in-depth analysis on reduction of urban heat island effects for the existing apartment along with creation of water space. To analysis site, Envi-Met Model developed by Michael Bruse was used. The results are as follows. The temperature went from 298.9K to 297.82K and The wind speed went from 1.42m/s to 1.43m/s. The results are slight in this study because creation of water space is planned to a small area of an apartment complex. But if the water space would be applied to a whole city, the mitigation effect of urban heat island would be bigger.