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金世煥 江原大學校附設 體育科學硏究所 1991 江原大學校附設體育科學硏究所論文集 Vol.- No.16
만보계를 이용하여 수업중 이동거리와 촉진법 및 herat telermeter법에 의한 심박수의 측정결과로부터 대학의 일반 체육수업중의 운동의 양과 질에 관하여 검토했다. 보다 운동강도를 높이기 위하여 용구의 능률적 준비, 간단한 설명, 연습회수를 많게 하기위한 지도법의 연구, 비활동적인 학생을 개별 지도 및 동기부여 등에 의하여 수업에 적극적으로 참여시키는 방법등에 관한 연구가 필요하다고 생각된다. 심박수나 최대 산소섭취량 등의 생리적 부하강도와 주관적 운동강도와의 관련성을 정확히 파악하여, 지도하고자 하는 종목의 운동이 어느정도의 운동강도인가를 지도자가 이해하는 것과, 수업중의 발한, 안색, 호흡상태 등의 주관적 운동강도를 파악하여 운동량을 조절하는 것이 필요하다고 생각된다. 학교현장에서 요구되는 것은 수업 전개중에 운동량을 확보하기 위한 지도자의 지도법의 개발이 요구되며, 이를 위하여 심박수의 특성을 유효하게 응용할 필요가 있다고 생각된다.
WiBro 망을 이용한 2.5/3.5/5.5 GHz m-WiMAX 시스템 무선 측정용 주파수 변환기 개발
김세환,전국진 대한전자공학회 2011 電子工學會論文誌-TC (Telecommunications) Vol.48 No.2
For measuring quad-band module system using WiBro network, frequency converter was developed. The size of the fabricated frequency converter is 3.1 cm × 3.1 cm × 0.4 cm. Noise figure of the receiver part of the frequency converter was 2.62 ∼ 3.45 dB, EVM of that is -37.5 dB ∼ -34.5 dB. And EVM of the transmission part was -42.5 ∼ -35.5 dB. Quad-band module was fabricated with the developed frequency converter. Testing the quad-band module in 2.3 GHz WiBro network results the excellent internet connection for 2.5 GHz, 3.5 GHz and 5.5 GHz band. WiBro 망을 이용한 쿼드 밴드 모듈 시스템을 측정하기 위해서 주파수 변환기를 개발했다. 제작된 주파수 변환기의 크기는3.1 cm × 3.1 cm × 0.4 cm이다. 주파수 변환기 수신부의 잡음 지수는 2.62∼3.45 dB였으며, EVM은 -37.5∼-34.5 dB로 측정되었다. 그리고 송신부의 EVM은 -42.5∼-35.5 dB로 측정되었다. 개발된 주파수 변환기와 함께 쿼드 밴드 모듈을 제작하였고,2.3 GHz 와이브로 망에서 쿼드 밴드 모듈을 테스트한 결과, 2.5 GHz, 3.5 GHz, 5.5 GHz 대역에서 원활한 인터넷 연결이 가능했다.
이상건,김세환 江原大學校附設體育科學硏究所 1997 江原大學校附設體育科學硏究所論文集 Vol.- No.21
This is study was to provide the basic data for improving the health problems following life style change of teenagers. I examined the life time and energy of 18 middle school students on the third grade according to the measurement of oxygen intake and heart rate for 24hors with dividing them into group : attending-to-school-by-bus group (belows B-group), on-foot group (F-group), by-car group (A-group), and by-bicycle group (C-group). the results were as follows : 1) Energy expenditure for one day of B-group was 2443㎉, that of F-group was 2597㎉, that of A-group was 2282㎉, that of C-group was 2860㎉ and so, 2546㎉ as average. 2) Energy expenditure per weight of B-group was 39.6㎉, that of F-group was 42.7㎉, that of A-group 34.6㎉, that of C-group was 51.5㎉ and so, 42.1㎉ as average. 3) Energy expenditure per minute for each kind of activity was P < 0.003 only when going to school and differed from group to group. 4) Heart rate for one day of B-group was 83.8beats/m, that of F-group was 75.3beats/m, that of A-group was 82.2beats/m, that of C-group was 81.9beats/m, and so, 80.0beats/m as average. 5) Heart rate for each kind of activity was P < 0.001 only when going to school and differed from group to group. 6) Time for each kind of activity did not differ from group to group and the middle school students on the third group has similar life patterns. 7) Energy expenditure for each kind of activity differed from group to group only when going to school (P < 0.005) and coming back home(P < 0.05). 8) It was the studying time at home and also in school that mostly effected on the energy expenditure for one day of the middle school students and related as 49% of the whole. This study examined only energy expenditure and so, in other to collect the data for improving the health problems, it needs to examine the energy intake and much more objects.