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장명석 한국전기기술인협회 1999 電力技術人 Vol.206 No.10
리니어 모터는 18세기 중반에 발명되어 초기에는 섬유공업에서의 방적기 북으로 개발되어 사용되었었다. 그 후 1946년 미국 웨스팅하우스에서 리니어모터를 이용하여 항공모함에서 비행기 이, 착륙 보호장치인 electropult를 개발한 이래로 여러분야에의 응용이 확산되기 시작되었다.
수학 게임을 활용한 복습 활동이 학생의 수학적 성향에 미치는 영향
장명석,노지화 영남수학회 2022 East Asian mathematical journal Vol.38 No.4
This study looked at how content reviews with mathematical games in class would influence the mathematical disposition of middle school students. In doing so, three games adapted from prior research were used as a supplementary instruction after school hours over three months. The mathematical topics of the games involved concepts of probability and trigonometry at the middle school level. The results of the pre- and post-survey on mathematical disposition indicate that incorporating mathematical games appeared to have some positive impacts on whether students might be more eager to learn mathematics and actually put more effort in learning materials.
복수의 열화특성을 가진 철도설비에 대한 최적정비주기 산출방법
박면규,장명석,박찬우 한국철도학회 2021 한국철도학회논문집 Vol.24 No.4
Railway equipment reliability (or failure rate) provides the basis for the estimation of the maintenance interval required in the process of maintenance management. In particular, the failure rate trend is needed to determine the optimal maintenance (or replacement) interval in a preventive maintenance policy. In other words, the optimal maintenance interval is determined depending on whether the failure rate is decreasing, constant, or increasing. This study proposes a method to estimate the optimal maintenance interval for railway equipment with multiple degradation characteristics and demonstrates the result by simulated data. The method can be used in cases in which equipment condition is monitored by IOT sensors that detect various degradation phenomena.