• Ocean and Polar Research
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• v.41 no.2
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• pp.99-105
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• 2019

Black-tailed gulls, Larus crassirostris, have been known as resident birds in Korea, but their wintering and breeding habitat ranges were little known about. We investigated the habitat ranges of Blacktailed gulls breeding on Dokdo Island - which is the eastern end of their breeding colonies in Korea. Three adult Black-tailed gulls were fitted with Global Positioning System data loggers in May 2018 and their positions were tracked for 9 days, 245 days and 365 days each respectively. Black-tailed gulls stayed on Dokdo Island until June for breeding purposes and moved down to the southern part of Japan for wintering. The following year, a Black-tailed gull started to move northward in February and returned to Dokdo Island in April. They traveled a total of $207,334-229,507km^2$ (MCP) throughout a whole year. Based on location density categories accounting for 50% of locations, they used 3,618 to $3,803km^2$ in area. Black-tailed gulls breeding on Dokdo Island used smaller habitat ranges during the wintering period than the other periods. This is the first report on the habitat ranges of Black-tailed gulls breeding on Dokdo Island.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.530-533
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• 2017

이 연구는 센서와 자율주행 자동차의 경로 추종의 효율성에 관한 연구이다. 자율주행 자동차의 '기술 현황'과 '주요 사용 센서 현황'을 통해 사용센서를 선정하였고, 선정한 센서들의 특성을 분석하였다. 초음파, 적외선, 조도 센서를 이용해 환경 변수가 제한된 상황에서 경로 추종 주행 연구를 실시하였다. 이 연구를 통해 동일 환경이라도 센서의 값이 상이한 것을 확인하였다.

• Proceedings of the Korean Society of Toxicology Conference
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• 2002.05a
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• pp.108-108
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• 2002

Mutations in the presenilin genes (PS-1 and PS-2) are linked to early onset familial Alzheimer's disease(AD), but its underlying cellular mechanisms have not been clear. 15-Deoxy-Δ12, 14-prostaglandin J2 (15-deoxy-PGJ2) is know as a naturally occurring ligand of the peroxisome proliferator-activated receptor-${\gamma}$ (PPAR-${\gamma}$).(omitted)

• Journal of Korea Multimedia Society
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• v.17 no.3
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• pp.353-363
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• 2014

Cloud computing is an internet-based technology, providing services to the virtualized IT environment, and allowing users to add or remove resources of hardware or software at their discretion. Since Cloud computing can construct virtually integrated environments out of multiple local computing environments, various information services can be provided by it. In addition, state organizations also strive to build the cloud computing environments due to the benefits of reduced costs to introduce the system and of reduced time to build and provide the IT services. This study suggests a web-based cloud computing system for the computing environments, to be applied for the Korean National Health and Nutrition Examination Survey (KNHANES) by the Ministry of Health and Welfare, Republic of Korea.

• Journal of Forest and Environmental Science
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• v.28 no.4
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• pp.289-294
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• 2012

This study was conducted from April 2012 to June 2012 to analyze breeding status of Black woodpeckers (Dryocopus martius) in the Gayasan National Park. Nest height, tree diameter which a nest built and altitude at the nest site of Black woodpeckers were 17.4 m, 63.8 cm and 587 m, respectively. A pair of Black woodpeckers completed a clutch in 4 eggs on 7 May and 3 of eggs hatched on 24 May 2012. Both female and male incubated eggs and never left eggs without one of parents. A male more contributed to build a nest than a female. Incubation duration was higher in a male than in a female. Nestlings made a begging call in a nest during the growing period. Begging frequency of nestlings increased from 11 days up to 20 days after hatching. After then, nestlings reduced begging and fledged a nest 24 days after hatching. This study provided information of breeding ecology to protect and manage population of Black woodpeckers which are endangered species in South Korea.

• Journal of Wetlands Research
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• v.18 no.1
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• pp.1-9
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• 2016

Areas around of National Park have been severed eco-corridor of wildlife due to urban expansion and development. Habitats have been fragmented into small pieces. Habitat fragmentation reduces the biodiversity of organisms because the exchange loss and inbreeding of wild fauna and flora. The main cause of the fragmentation of ecological networks in areas around of Moodeungsan National Park are are that the cemetery, cutting of mountain, roads, public parking lots, mountain encroachment by land, urban infrastructure, electric transmission towers, urban area. Area around of National Park must be equipped with ecological networks through an ecological design that can communicate with each other in the national park and urban areas.

• Korean Journal of Plant Taxonomy
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• v.50 no.3
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• pp.262-278
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• 2020

We investigated the bryophyte flora of Taebaeksan Mountain National Park in Korea by conducting a total of ten field surveys from April of 2017 to October of 2019 at various mountainous sites in the park. During the surveys, we recorded 274 taxa belonging to 68 families, 143 genera, 267 species, 3 subspecies, and 4 varieties. Among these, 92 species were reported as new to the flora of the Taebaeksan Mountains. A checklist based on a study of 990 specimens is provided as well. The most remarkable species were Sphagnum capillifolium (Ehrh.) Hedw, Sphagnum girgensohnii Russow, Buxbaumia punctata P.-C. Chen et X.-J. Li, Pleuroziopsis ruthenica (Weinm.) Kindb., Ptilium crista-castrensis (Hedw.) De Not., and Douinia plicata (Lindb.) Konstant. et Vilnet.

• Proceedings of the Plant Resources Society of Korea Conference
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• v.18 no.1
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• pp.35-37
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• 2005

• Proceedings of the PSK Conference
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• 2002.04a
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• pp.165.1-165.1
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• 2002

• Parasites, Hosts and Diseases
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• v.49 no.3
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• pp.331-335
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• 2011

A tick survey was conducted to determine the relative abundance and distribution of ticks associated with selected mammals in the Republic of Korea (ROK) during 2008-2009. A total of 918 ticks were collected from 76 mammals (6 families, 9 species) captured at 6 provinces and 3 Metropolitan Cities in ROK. Haemaphysalis longicornis (54.4%) was the most frequently collected tick, followed by Haemaphysalis flava (28.5%), Ixodes nipponensis (7.6%), Ixodes pomerantzevi (4.8%), Ixodes persulcatus (4.6%), and Haemaphysalis japonica (0.1%). Adults (57.0%) and nymphs (28.7%) of Ixodes and Haemaphysalis spp. were collected most frequently from medium or large mammals in this survey, while few larvae (14.3%) were collected. Hydropotes inermis was the most frequently captured mammal (52.6%), with a 16.4 tick index and 5 of 6 species of ticks collected during this survey. H. longicornis (69.7%) was the predominant tick collected from H. inermis, followed by H. flava (22.2%), I. persulcatus (6.1%), I. nipponensis (1.8%), and H. japonica (0.2%).