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혼합 유해가스 누출 현장의 위험도 예측을 위한 안전지수 모델 개발
박재윤(Jae-Yun Park),송재종(Chai-Jong Song) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.11
본 논문에서는 화학물질 취급소와 같은 장소에서 유해가스 누출에 따른 재난 발생시 인근주민과 방재 작업에 투입된 작업자에게 유해가스 누출 정도를 정량적으로 제공하기 위한 재난안전 서비스를 구성하는 다양한 기능의 핵심 부분인 안전 지수 개발을 기술한다. 안전지수는 실시간으로 측정되는 11 가지 유해가스의 공기중 농도를 조합하여 4 단계로 구분되도록 설계하였다.
차광이 차나무 수관 주변의 미기상과 신초의 품질에 미치는 영향
송인관(In Kwan Song),오은의(Eun Ui Oh),황재종(Jae Jong Hwang),송승운(Seung Woon Song),김봉찬(Bong Chan Kim),송관정(Kwan Jeong Song) 한국차학회 2013 한국차학회지 Vol.19 No.4
The changes in the micro climatic conditions around the canopy and the quality characteristics by shading in new young shoots of 'Asanoka' and 'Lyohu' tea plants were examined to collect basic data on the development of cultural practices for producing food materials with high quality by the cover of shading nets. Shading treatments were conducted by covering the tea canopy with black polyethylene nets with a shading rate of 95, 75, 55, and 35%, and a covering structure was designed to create an air space 30 cm in height above the canopy using a supporting pole. The light transmissivity through the shading nets in the 4th tea season and air temperature around canopy in the 2nd and 3rd tea seasons was measured to examine the effects of shading on the micro climatic conditions. The contents of total nitrogen, total amino acids, theanine, cathechins, caffeine, vitamin C, tannin, and crude fiber and chroma (Hunter a) were analyzed from new young shoots in different tea seasons to determine the effect of shading on the shoot quality. Light transmissivity through 95% and 75% shading nets was similar, but 55% and 35% shading nets were different from that on the current product indicated by the manufacturer. The changes in air temperature by the cover of shading nets was larger in the canopy surface and air space above canopy than the internal canopy. There was a tendency of the daily maximum air temperature to be high with no shading and low with a cover of 95% shading nets, but there was no difference in the daily minimum temperature. In a comparison of the shoot quality affected by the cover of 95% and 75% shading nets, the content of amino acids, theanine, caffeine, and crude fiber showed tendencies to increase, but the content of cathechins, vitamin C, and tannin showed tendencies to decrease and the chromaa value showed a distinct decline toward a green color withno shading.