• 한국환경과학회지
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• 제22권9호
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• pp.1227-1234
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• 2013

Between July and October 2011, radio-tracking was used to analyze the characteristics of home ranges and day roosts of Myotis aurascens by using 3 individuals (male: 2, female: 1). Bat capturing was conducted at a bridge and a nearby forest in Ulju-gun, Ulsan-si. We attached radio transmitters (0.32 g) to the bats and monitored them by using a radio receiver with a Yagi antenna. Home-range analysis of M. aurascens by using 100% minimum convex polygon (MCP) and 95% MCP showed an average of 106.5 ha and 89.3 ha, respectively, and 50% kernel home range (KHR) showed an average of 8.4 ha. Home range overlap of the 3 bats was observed at the bridge and at nearby water bodies as the core areas, and the size of the home range overlap was 7.3 ha by 100% MCP, 5.9 ha by 95% MCP, and 1.6 ha by 50% KHR. The home range for each bat consisted of the main foraging sites, and the types of foraging sites were similar. M. aurascens-01(M-01) used the bridge and nearby water bodies as the nightly main core areas, M. aurascens-02(M-02) used rice fields and water bodies adjacent to the forest as core areas, and M. aurascens-03(M-03) used water bodies and resident areas as core areas. Although rice fields and resident sites represented the core areas of the home ranges of M-02 and M-03, habitat use was the highest near water bodies as the core area for all the 3 bats. The types of day roosts in this study were a wooden house, canopies of a broad-leaved woodland, and banks of rice fields. The roosts in the wooden house and canopies of the broad-leaved woodland were located within the forest, and the roost in the banks of rice fields was also adjacent to the forest. Our results revealed that the main home range and foraging sites of M. aurascens were located near water bodies as the core area, and forests and places adjacent to the forests were used as day roosts.

• 한국환경복원기술학회지
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• 제17권6호
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• pp.51-60
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• 2014

This study was carried out to analyze the home ranges of three medium-sized mammals(Nyctereutes procyonoides, Prionailurus bengalensis, and Meles leucurus) inhabiting the Sobaeksan National Park, Korea. Three individuals of each species were captured using live traps(Tomahawk live trap 210A) and radio tracking was conducted from June 2012 to May 2014 using VHF and CDMA methods. We determined that the home range of N. procyonoides was $6.53{\pm}6.66km^2$(MCP 100), $3.39{\pm}4.73km^2$(FK 95), and $0.48{\pm}0.62km^2$(FK 50), that of P. bengalensis was $7.13{\pm}5.61km^2$(MCP 100), $7.77{\pm}3.91km^2$(FK 95), and $1.88{\pm}0.96km^2$(FK 50), and that of M. leucurus was $1.77{\pm}1.82km^2$(MCP 100), $3.17{\pm}4.52km^2$(FK 95), and $0.63{\pm}0.87km^2$(FK 50). The home ranges of both N. procyonoides and P. bengalensis were greater than that of M. leucurus, and moreover, both were larger than $6km^2$(P. bengalensis>N. procyonoides). The results also showed that for each species, 1.2~4.4% of the home range overlapped with that of the other two species and that this overlap occurred in the vicinity of a water system.

• 한국환경생태학회지
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• 제22권4호
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• pp.427-434
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• 2008

2004년 10월부터 2006년 12월까지 지리산에 방사한 반달가슴곰 7개체를 무선추적하여 연간 행동권 크기를 분석한 결과, 95% MCP에서 반달가슴곰 암컷은 71.66$km^2$, 수컷은 90.20$km^2$로 분석되었다. 계절별 행동권 크기는 암컷곰이 봄 19.8$km^2$, 여름 30.48$km^2$, 가을 22.63$km^2$, 겨울 0.22$km^2$이었고, 수컷곰은 봄 33.47$km^2$, 여름 20.26$km^2$, 가을 23.23$km^2$, 겨울 0.78$km^2$이었다(F=4.193, P<0.05). 반달가슴곰의 행동권역중 약 38% 정도가 중첩되었고, 암컷간 12.5%, 수컷간 22.4% 정도가 중첩되었다. 서식지 평균 해발고도는 봄 744$\pm$236m, 여름 682$\pm$253m, 가을 937$\pm$218m, 겨울 975$\pm$137m로 분석되었다(F=8.526, P<0.001). 반달가슴곰의 행동권 크기와 위치는 주로 먹이의 분포와 생산량과 밀접한 관계가 있으며, 계절별 서식 환경특성, 연령 등에 따라서도 차이가 있음을 알 수 있었다.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.679-682
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• 2008

무선 통신에 대한 높은 관심은 관련 기술을 이용하여 실생활에 적용하기 위한 연구로 이어지고 있다. 이러한 무선 통신 기술들 중 근거리 무선 통신 기술인 Binary CDMA(Code Division Multiple Access)기술은 2.4Ghz의 RF영역을 사용하여 데이터를 전송하는 기술이다. 이 기술은 기존의 근거리 무선 통신인 Bluetooth보다 뛰어난 전송거리를 보장하고 있으나, 무선 통신 기술의 공통적인 문제점인 장애물에 의한 신호 감소로 인해, 실제 보장되는 거리보다 짧은 거리의 전송거리가 나타나는 구간이 생기게 된다. 이러한 문제점을 해결하기 위해 본 논문에서는 Clustering을 이용하여 보다 넓은 전송거리를 확보하기 위한 아이디어를 제시한다.