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무선 분산 시스템을 이용한 멀티 인터페이스 무선 메쉬 네트워크 테스트베드
윤미경,양승철,김종덕,Yoon, Mi-Kyung,Yang, Seung-Chur,Kim, Jong-Deok 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.6
무선 메쉬 네트워크는 네트워크 구성의 용이성과 비용적인 장점으로 각광받고 있는 무선 백본 네트워크 기술이다. 최근 상용화된 제품이 출시되고 있지만, 대부분의 기존 연구 기술은 시뮬레이션을 통해 성능을 분석하였다. 본 논문에서는 실제 상황을 고려하여 무선 메쉬 네트워크 테스트베드를 구축하였다. 본 테스트 베드는 무선 분산 시스템(Wireless Distribution System)과 브릿지를 응용하여 멀티채널 멀티 인터페이스와 동적인 위치기반 라우팅 프로토콜을 지원한다. 위치기반 라우팅 프로토콜은 링크 채널 변화와 물리적 거리를 고려한 메트릭을 이용하여 무선 간섭에 강하게 설계하였다. 그리고 메쉬 클라이언트들은 중앙 집중 주소 관리 서버를 통해 주소를 할당 받아 통신하며, 간이 망 네트워크 관리 프로토콜을 통해 망을 관리하도록 설계 및 구현하였다. Wireless Mesh Network(WMN) is wireless backbone networks technique which has ease of network configuration and cost of advantage. Recently, WNM released a new product, but most of existing research and technology analysis the performance through the simulation. This paper build the wireless mesh network testbed for actual situation. Testbed supports multi-channel multi-interface using bridge, the Wireless Distribution System and dynamic location-based routing protocol. This routing protocol strongly design against wireless interference using metric for link channel change and real distance. Then, the address of mesh clients assigned by the centralized address management server. Mesh clients is designed and implemented to manage network through Simple Network Management Protocol.
초등학생의 방과 후 스포츠 활동 참여가 신체적 자기개념과 체육수업 인식도에 미치는 영향
윤미경(Yoon, Mi-Koung),김필승(Kim, Pil-Seung) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.6
This paper presents a comparative analysis on effect of participation in elementary extracurricular sport activities after school to physical self-concepts and cognition. First, sports skills such as physical activity and flexibility and endurance and strength and body-wide etc. is appeared higher to the elementary school students who attend to an extracurricular sport activities than other who do not participate to it. Second, statistically significant differences are observed depending on participation in extracurricular sport activities, in the perception of the recognition of interest and the atmosphere of the elementary school students, between participation and non-participation. Third, the physical self-concept and physical education are significantly correlated, depending on whether or not participating after-school sports activities in perception. Finally, physical self-concept has had a significant impact on physical education awareness and physical self-concept factors are significantly influenced to students who attend to extracurricular sport activities after school. the factor are interested in flexibility, overall body, showed that factors affecting the health and otherwise the appearance factor showed a negative effect. However, students who did not participate in after-school sports activities is found not to affect.