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실적 온난화 처리가 굴참나무 묘목의 엽록소 함량 및 순광합성률에 미치는 영향
조우용 ( Woo Yong Jo ),손요환 ( Yo Whan Son ),정혜근 ( Hae Geun Chung ),노남진 ( Nam Jin Noh ),윤태경 ( Tae Kyung Yoon ),한새롬 ( Sae Rom Han ),이선정 ( Sun Jeoung Lee ),이수경 ( Sue Kyoung Lee ),이궁 ( Koong Yi ),( Li Xia Jin 한국산림과학회 2011 한국산림과학회지 Vol.100 No.4
We investigated the effect of artificial warming on chlorophyll contents and net photosynthetic rates of 2-year-old Quercus variabilis seedlings in a nursery open-field experiment site. 64 seedlings were each planted in 1 m×1 m plots (n = 4) and warmed with infrared lamps. The air temperature in warmed plots was 3°C higher than that of control plots. Chlorophyll contents and net photosynthetic rates were measured in May, July, August, September and October, 2011. In May, September and October chlorophyll contents and net photosynthetic rates were significantly higher in warmed plots than in control plots. However, there were no significant differences in chlorophyll contents and net photosynthetic rates between warmed plots and control plots in July and August. It seemed that early developed leaves of warmed plots in May with higher chlorophyll contents could lead to higher net photosynthetic rates whereas there was no difference in net photosynthetic rates due to saturation of chlorophyll contents in July and August. Increased biosynthesis of chlorophyll due to warming might increase net photosynthetic rates in September and October.
최정혜 ( Jeong Hye Choi ),정예림 ( Ye Rim Chung ),조우용 ( Woo Yong Jo ),김민경 ( Ming Yung Kim ) 한국지식경영학회 2015 지식경영연구 Vol.16 No.3
The mobile market has introduced unprecedented shopping opportunities to customers and is expected to grow rapidly over time. However, little is known about how customers make purchase decisions in the mobile market. The purpose of this study is to investigate the drivers of mobile VOD purchases and to deliver valuable insights to mobile business operators. We focus on the purchase of VOD contents that have to be purchased and consumed using mobile devices and examine how individual-level purchase decisions are determined by three factors: perceived usefulness, usage behavior, and privacy concern. We obtained the panel data from a leading market research company that contains the mobile logs and survey results. Our main results suggest the followings. First, the perceived usefulness affects customers’ mobile VOD contents purchases positively whereas the usage behavior exerts no influence on mobile contents purchases. Moreover, the privacy concern lowers the positive effect of perceived usefulness on mobile content purchases; however, it enhances the effect of the usage behavior on mobile contents purchases. These empirical findings indicate that mobile business operators should pay more attention to potential differences in perception and behavior using mobile devices and keep in mind that the privacy concern plays an additional key role in driving mobile contents purchases.