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우종서,이해수,( Latifatu Mohammed ),고장면 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Supercapactors are attractive for energy storage particularly in applications involving high-power requirements. Gel polymer electrolyte (GPE) is appealing in these devices due to their high ionic conductivity, electrode compactness and environmental friendliness. A nonwoven separators coated with different polymer GPE were fabricated to support and impact mechanical property to the GPEs. The coated separators exhibited ionic conductivity of 4.5×10-2, 4.2×10-2, 1.6×10-2 and 1.4×10-2S/cm for the KOH, PAAK, PVA and PEO coated separators respectively. Supercapacitors were designed with the coated separators. The capacitors were subjected to cyclic voltammetry (CV) and electrochemical impedance spectroscopy(EIS). These superior performance can be attributed to the synergistic effect of the PAN nonwoven separator and the polymer materials which have the ability to hold sufficient water in their polymer chains to enhance the needed ionic conductivity.
조경배식에 있어 지피식생조성에 관한 연구 -몽촌토성을 중심으로-
우종서,이경재 한국조경학회 1991 韓國造景學會誌 Vol.18 No.4
This research investigated soil, plants, insects and birds in the Mongchon Earth Fort, establishing the 11 plots, according to planting treatment, in order to present management method for ecological stability of species in the ground covering plots. The results of analysizing the investigated data summarize as follows. 1. In the ground covering plots without upper layer, the density and coverage of middle and low layer in the natural plots were higher than those in the artificial plots. 2. In the ground covering plots without upper layer, the density and coverage of low layer were higher than those in the artificial, while the density and coverage of herb layer in the natural plots were lower. 3. Whether there was upper layer or not, the total species diversity and enenness of the ground covering community in the natural plot without artificial treatment and natural treatment plot were higher than those ground covering. 4. In the ground covering plots with upper layer, the species diversity of ground covering in the plots without artificial treatment is high, while the species diversity in the plots with natural treatment caused the secondary succession is higher than that of the natural plot. 5. In the ground covering plots without upper layer, the species diversity in the plots with artificial management was higher than that of natural plots, while the evenness in the plots with artificial management was lower. 6. In the ground covering plots with upper layer the species diversity of insect in the plot of natural state was higher than that of insect in the plots with artifical treatment. 7. Synthetically, in the area with upper layer the species diversity of the ground covering community in the natural plot was high, while in the area without upper layer, the species diversity of it in the plots with artificial treatment was high. The insect turned up frequently in the plots of high species diversity of the ground covering, so the bird did in the plots of high species diversity of the ground covering and insects.