Spatially varying effects of Gyeongui Line Forest Park on Retail Types and Location

Department of Urban and Environmental Engineering (Urban Infrastructure Engineering)The importance and interest about green space continue to grow as people's interest in the quality of life increases with global environmental issues in recent years. Accordingly, various studies have been conducted on the direct and indirect benefits provided by the green space in the urban. And the benefits have impact on surrounding area. These effects of parks are not only positive but also negative. the park constructed in the city plays a role in raising the property value in the surrounding area, and various studies about this effect have been steadily conducted in many countries. In particular, research on the effects of parks using hedonic models has been actively conducted. These results show that the closer the distance from the park, the greater the impact on property value and many studies show similar results. Many studies show the effect of an urban park on neighborhoods, but the effect of urban park on the specific commercial environment of the neighborhood is relatively less studied. The Gyeongui Line Forest Park is a good study area to understand the diverse pattern of commercialization according to the characteristics of the neighborhood and also it has worth doing research. Therefore, this study carried out research with two purposes. First, we suggest the sustainable management plan through empirically exploring the mechanism of commercialization triggered by the Gyeongui Line forest park. Especially, we classify the retail services into six types to identify the characteristics of retail location decision. Second, after clustering neighborhoods through statistical method, we aim to derive the academic implications that need for effective urban management planning by identifying the characteristics of retail opening according to classified neighborhoods. As a result, the construction of the Gyeongui Line Forest park led to the commercialization of adjacent neighborhoods. In particular, it was confirmed that the total retail increased 1.6 to 1.8 times in the neighborhood nearest to the park(0-100m). In addition, the increase of the occupation of all retail type in the residential area increased, and the effect was larger the closer to the park. Therefore, commercialization due to the formation of the Gyeongui Line Forest Park has been triggered, and it has been confirmed that it occurs intensively in the residential area. The patterns of retail opening induced by parks construction are as follows. In the case of restaurant, the number of entrepreneurs increased more than twice in the area adjacent to the park. Among the retail services classified in this study, the restaurant is highly productive, which is a result of empirically revealing the self-destruction of diversity as claimed by Jane Jacobs(1961). On the other hand, in the case of the neighbor retail, the result was significantly decreased only in the section(100-200m). However, it can be said that the crowding low productivity retail out has occurred. In the case of bar, it is expected that the high productivity of bar pushed off the low productivity of the neighboring retail when considering that the section between the decrease of the neighbor retail and the increase of the bar is same. In case of caf??, it decreased in the neighborhoods adjacent to the park, while it increased in the residential neighborhoods adjacent to the park. This result suggests that the caf?? sector has moved to a low rent residential area due to the park construction As a result of the above-mentioned results, commercialization was induced by the park construction, and it was confirmed that the industries with high productivity in the residential area increased in particular. These results indicate that eco-gentrification phenomenon, similar to highline parks, is needed a concern. Therefore, policy instruments for sustainable neighborhood management are needed.ope

Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate

A hybrid of Ag nanoparticle (NP)-embedded thin silica-coated graphene oxide (GO@SiO2@Ag NPs) was prepared as a surface-enhanced Raman scattering (SERS) substrate. A 6 nm layer of silica was successfully coated on the surface of GO by the physical adsorption of sodium silicate, followed by the hydrolysis of 3-mercaptopropyl trimethoxysilane. Ag NPs were introduced onto the thin silica-coated graphene oxide by the reduction of Ag+ to prepare GO@SiO2@Ag NPs. The GO@SiO2@Ag NPs exhibited a 1.8-fold enhanced Raman signal compared to GO without a silica coating. The GO@SiO2@Ag NPs showed a detection limit of 4-mercaptobenzoic acid (4-MBA) at 0.74 μM