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        검색결과 111

        83.
        2004.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        A temperature control system was developed to save energy in freeze dryer. The objective part in the freeze dryer was a shelf with an electrical heater and cooling compressor. The shelf was a fluid circulation heat exchanger. The temperature control of the shelf is generally a feedback control by present and set values of the shelf temperature only, whereas in new control algorithm the circulating fluid temperature and fluid circulating speed were included as well. The control algorithm was based on a concept of refraining the heater and cooler from being in operation if unnecessary. Actuators in use were mainly thyristor for heater, relay for cooling compressor, inverter for fluid circulating pump, etc. Type of Interfaces were RS232C, and digital-analog converter and digital-output converter. Program language was Visual Basic 6.0. Finally, control performance by the new algorithm could be improved in terms of energy saving and accuracy.
        4,000원
        84.
        2004.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Flour extraction was analyzed by milling different varieties of wheat with different gaps of break rolls of Buhler automatic laboratory mill MLU-202. Straight flour extraction increased with decrease in the roll gap, which was mainly due to increase in break-related flour extraction, especially the flour from the first break roll. Farina extraction also increased with decrease in the roll gap, which contained a large amount of shorts and relatively small amount of flour. Straight flour extraction of wheat with larger kernel diameter was higher, but their correlation was not significant. Meanwhile, the kernel hardness showed significant (-) correlation with the flour extraction and (+) correlation with the shorts extraction. Consequently, the effect of the break roll gap was significant on the flour extraction, and the kernel hardness influenced the flour extraction more than the kernel diameter.
        4,000원
        97.
        1997.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        4,000원
        99.
        2020.11 KCI 등재 서비스 종료(열람 제한)
        목적: 본 연구는 운동선수의 절실함과 운동몰입, 인지된 경기력 간의 구조관계를 검증하는데 목적이 있다. 방법: 이를 위해 429명의 운동선수를 대상으로 자료수집이 이루어졌으며, 최종 418부를 대상으로 분석을 실시하였다. SPSS 26.0과 AMOS 21.0 프로그램을 활용하여, 측정모형에 대한 확인적 요인분석, 기술통계 분석과 상관관계 분 석을 실시하였으며, 구조방정식모형 분석을 이용한 매개효과 검증을 실시하였다. 결과: 첫째, 절실함의 하위요인 중에서 인내와 극복이 가장 높게 나타났다. 둘째, 운동선수의 절실함은 운동몰입과 인지된 경기력에 유의한 정적 영향을 미치는 것으로 나타났으며, 운동몰입 또한 인지된 경기력에 유의한 정적 영향을 미치는 것으로 나타났다. 셋째, 절실함과 인지된 경기력 간의 구조관계에서 운동몰입을 통한 매개효과가 유의한 것으로 나타났다. 결론: 운 동선수의 절실함이 높을수록 운동상황에 더 몰입하게 되어 자신의 경기력 수준을 높게 인식하는 것으로 나타났다.
        100.
        2015.10 서비스 종료(열람 제한)
        In this research, We investigate evaluation on properties of mortars incorporated with waste LCD glass. LCD glass was grinded at 2,500, 3,500, 4,500 cm2/g blaine to replace 20% wt of cement. The compressive strength and Alkali-silica reaction test was carried out to verify effect of finess of LCD glass.
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