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지리산 주요 활엽수종의 (闊葉樹種) 엽면적 (葉面積) 추정식에 대한 연구
김시경,이경학 ( Si Kyung Kim,Kyeong Hack Lee ) 한국산림과학회 1985 한국산림과학회지 Vol.70 No.1
This paper is concerned with estimating equations of leaf area(A) obtained from linear measurements - leaf length(L) and leaf width(W) - on the leaves of 13 species composing a natural mixed stand in Mt. Jiri. This method is known to be rapid and non-destructive in estimating leaf area. The equation of A=bLW is frequently used in rough and rapid estimation. Each species in this study has its own coefficient b according to its geometrical leaf shape. The range of coefficients of 13 species was 0.579 to 0.717. This means that the relationship A=2/3LW is suitable to most broad leaf species in a natural mixed stand in Mt. Jiri. When more precise estimation of leaf area is needed, full regression equation is used. In this study, the form of log A = b_0 + b₁ log LW was the most precise estimation equation in 8 species. In addition to this, the form of A = b_0 + b₁LW and A = b_0 + b₁L² + b₁W² were founded to be suitable for estimation of leaf area. In comparision of these two forms, the determination coefficient were about the same, but the F-value of the former was greater than that of the latter. Therefore, the use of the former seems to be more reliable and practical.
신원섭(Won Sop Shin),김시경(Si Kyeong Kim),연평식(Poung Sik Yeon),이정희(Jeong Hee Lee) 한국산림휴양학회 2010 한국산림휴양학회지 Vol.14 No.2
본 실험은 산림의 대표적 방향물질이라고 할 수 있는 편백정유에 의한 신체의 반응을 살펴보고자 설계되었다. 본 실험에서 신경인지능력검사(Vienna Test System)와 심박변이도(Heart Rate Variability HRV)를 측정도구로 사용하였으며, 편백정유의 노출과 대조물질의 노출 이후에 나타나는 반응에 대해서 측정하였다. 그 결과 신경인지능력검사의 경우 Cognitrone에서 옳게 반응한 개수(number of correct response, CRN)이 유일하게 유의적 상승을 보였다. 반면 생리적 반응인 심박변이도에서는 스트레스 지수와 피로지수는 감소를 건강지수에서는 증가를 보였으며 통계적으로도 모두 유의적으로 나타났다. The main purpose of this study was to investigate the effects of phytoncide on psychophysiological responses. In this study, Vienna test system and Heart Rate Variability (HRV) were employed as research variables. Subjects were exposed to essential oil of Hinoki Cypress (Chamaecyparis obtusa), then their psychophysiological responses were investigated. The results of this study indicated that there were positive relationships between exposed to essential oil of Hinoki Cypress (Chamaecyparis obtusa) and their psychophysiological responses.