• Title/Summary/Keyword: 집적도

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A Spatial Structure of Agglomeration Pattern Near High-Speed Rail Station of Korea and Japan (한국과 일본 고속철도역 주변 집적 공간구조에 대한 관측 연구)

  • KIM, Kyung-Taek;KIM, Jung-Hoon
    • Journal of the Korean Association of Geographic Information Studies
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    • v.21 no.4
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    • pp.14-25
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    • 2018

  • The operation of high-speed rail (HSR) has an effect on the agglomeration economies, and the impact is shown as a relocation of individual firm and worker to where business activity can be maximized. The proximity to the HSR station could be considered as a core district to maximize the industrial benefit through the HSR network. From this perspective, this study considers the agglomeration effect of HSR within the HSR station-area and analyzed the agglomerated spatial pattern through hotspot analysis by service industry in the cases of Korea and Japan using GIS. This study analyzed the service industry within 1km distance from 8 HSR stations of Korea and 4 Kyushu Shinkansen stations of Japan. The results suggest that the hotspot patterns are observed in the service industry within 1km distance from the HSR station of Korea and Japan, except for two HSR stations of Gupo station and Kagoshima-Chuo station. Leisure, amusement, association, and other specific service industries could be affected by HSR passengers and knowledge-spillovers through HSR station. Therefore, the observed hotspot districts near the HSR station-area could explain an agglomeration pattern of the service industry through a closeness to the HSR station. Further, we could expect that the impact of HSR affects the service industry, and the impact could attract business activities of the service-area to maximize their benefit from HSR travelers. With the result, it is required to build up a supportive policy to maximize the HSR's impact on the service industry when considering the HSR station-area development.

  • https://doi.org/10.11108/kagis.2018.21.4.014 인용 PDF KSCI

Characteristics of Surface Sediments and Accumulation before and after the Typhoon Kompasu in the Gochang Gwangseungri Sandy Intertidal Flat, Korea (태풍 곤파스 전·후 고창 광승리 사질 조간대의 표층 퇴적물과 집적 특성)

  • Sol Ip Kang;Woo Hun Ryang
    • The Korean Journal of Quaternary Research
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    • v.34 no.1
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    • pp.15-30
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    • 2024

  • Typhoon effects on macrotide open-coast intertidal sediments were investigated in the Gochang Gwangseungri sandy intertidal flat on the Korean western coast. Variations in the surface sediment texture, accumulation, and sedimentary facies were observed before and after the Typhoon Kompasu in 2010. The typhoon Kompasu landed on the southwestern coast of the Korean Peninsula and passed inland between September 1st and 2nd, 2010, respectively. Surface sediments and their accumulation before and after the typhoon were sampled and measured at intervals of 30 m along a survey line on the Gwangseungri intertidal flat. The intertidal areas were divided into high, middle, and lower tidal zones based on the mean high-wate level, mean sea level, and mean low-water level, respectively. The surface sediments of each tidal zone show rare variations in grain size and sorting of sediment texture before and after the typhoon Kompasu, whereas negative skewness values increased in the middle and lower tidal zones after the typhoon rather than before the typhoon. Surface accumulation represents deposition in the upper and middle tidal zone and erosion in the lower tidal zones after the typhoon. The accumulation decreased from the high to the lower tidal zones.

  • https://doi.org/10.22658/koq.2024.34.1.015 인용 PDF

Enhanced Resistance to Sulfur Dioxide Gas in Transgenic Petunia by Stacking both SOD2 and NDPK2 Genes (SOD2와 NDPK2 유전자 집적에 의한 페튜니아의 아황산가스 저항성 증진)

  • Lee, Su Young;Cheon, Kyeong-Seong;Kim, So Young;Kwon, O Hyeon;Lee, Hye Jin;Kim, Won Hee;Yoo, Bong Sik
    • Horticultural Science & Technology
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    • v.34 no.1
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    • pp.154-162
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    • 2016

  • The aim of this study was to develop a transgenic petunia with enhanced resistance to sulfur dioxide ($SO_2$) gas by stacking two genes, SOD2 and NDPK2, which are both known to confer resistance to abiotic stresses. The first-generation hybrids ($TF_1$) were obtained through reciprocal crosses between an SOD2-transgenic line SOD2-2-1-1-35($T_4$)[S($T_4$)] and an NDPK2-transgenic line NDPK2-7-1($T_2$)[N7-1($T_2$)]. Approximately 32.1-73.0% of the first-generation hybrids ($TF_1$) carried both SOD2 and NDPK2 genes. These hybrids showed 2.6 and 5.1 times less damage than hybrids carrying only SOD2 or NDPK2 genes, respectively, when they were treated with $SO_2$ gas at 30 ppm. This confirmed that the heterozygous hybrids were more resistant to $SO_2$ than the hybrids carrying either one of the resistance genes. Second-generation hybrids ($TF_2$) were obtained by selfing the $TF_1$ individuals. We confirmed the expression of the stacked genes in the $TF_2$ hybrids by phenotypic observation of their response to $SO_2$ gas at 30 ppm as well as using RT-qPCR and photosynthetic efficiency.

  • https://doi.org/10.12972/kjhst.20160017 인용 PDF KSCI