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RISS 인기검색어
- 검색키워드
- 저자 : Bing-Yu Chi (검색결과 2 건)
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Comparison of Bird community in Urban and Non-Urban area at Young-San river
Jin, Seon-Deok,Bing, Gi-Chang,Park, Chi-Young,Yu, Jae-Pyung,Paik, In-Hwan,Paek, Woon-Kee,Lee, Doo-Pyo National Science Museum of Korea 2011 Journal of Korean nature Vol.4 No.3
This Study was carried out for the period from June 2003 until March 2005 aimed at comparing the characteristics of birds communities between non-urban district and urban district in the Yeongsan River basin, grasping the influence on the birds in the urban district basin, and ultimately exploring the method of preserving and managing the birds in a proper manner. The number of birds observed in this study recorded 83 species 19,322 individuals in total where the number of species were 73 in non-urban district while 71 in urban district. For the number of individuals showing larger number in urban district, 7,409 were in non-urban district while 11,913 were in urban district. For the species diversity, urban district was 2.62 while non-urban district was 3.01 showing high degree in non-urban district. For the number of individuals by bird group, Herons and Ducks were higher in the Site 6 (urban)/Site 7 (urban) while Raptors were higher in the Site 3 (non-urban) and Site 8 (urban), and Shorebirds were higher in the Site 3 (non-urban). Forest birds were found the highest in the Site 1 (non-urban), while Others higher in the Site 1 (non-urban), Site 6 (urban), and Site 8 (urban). With regard to species composition by districts, those in non-urban district consisted of Forest birds (46.1 %), Ducks (43.4%), Herons (5.3%), Shorebirds (2.6%), Others (2.2%), and Raptors (0.4%) in order of high to low composition, while urban district consisted of Ducks (75.5%), Forest birds (16.1%), Herons (5.3%), Others (2.2%), Shorebirds (0.7%), and Raptors (0.2%) in the afore-mentioned order. In result, a great difference was shown between non-urban district and urban district in the Yeongsan River basin. Accordingly when implementing environmental improvement in urban district, it is deemed necessary to do it taking the inhabiting environment of non-urban district into account in order for a stable maintenance, preservation, and management of the birds communities.
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Ting-Ting Su,Wen-Feng Ren,Jiang-Meng Yuan,Ke Wang,Bing-Yu Chi,Run-Cang Sun 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
The commercial application of silicon (Si) anodes with high theoretical capacity is hampered by the poorcyclic stability because the huge volume change of Si during discharge/charge processes results in thepulverization of electrode materials and the electric contact loss of electrode materials with copper(Cu) foils. Binders play an important role for adhering active materials and conductive additives togetheronto Cu foils. Herein, we design and develop a three-dimensional networked composite binder (PAA-co-SN) via an amidation reaction between polyacrylic acid (PAA) and thiourea (SN). The granular anchors(CuxS) are constructed at the interface between PAA-co-SN binders and Cu foils, resulting from the reactionof S and Cu during the drying processes of Si electrodes. When used as binders for Si nanoparticles,they exhibit stable cyclic performance (1580 mAh g1 after 500 cycles). The anchoring mechanismbetween composite binders and Cu foils provides a strategy for the improvement of electrochemicalproperties of Si-based anodes for lithium-ion batteries.
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