• Journal of the Korean Association of Geographic Information Studies
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• v.26 no.4
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• pp.173-187
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• 2023

In an era of population decline, depopulated regions facing challenges in attracting inbound population migration must enhance urban vitality through the attraction of living populations. This study focuses on Busan, a city experiencing population decline, comparing the spatiotemporal distribution characteristics of registered residents and living populations in various administrative districts (Eup-Myeon-Dong) using mobile communication big data. Administrative districts are typified based on population change patterns, and regional characteristics are analyzed using indicators related to urban decline and vitality. Spatiotemporal distribution analysis reveals generally similar density patterns between registered residents and living populations; however, a distinctive feature is observed in the city center areas where the density of registered residents is low, while the density of living populations is high. Divergent trends in spatial patterns of change between registered residents and living populations show clusters of registered population decline in low-density areas and clusters of living population decline in high-density areas. Areas adjacent to declining living populations exhibit large clusters of population changes, indicating a spillover effect from high-density to neighboring areas. Typification results reveal that, even in areas with a decline in registered residents, there is active population influx due to commuting or visiting. These areas sustain an increase in the number of businesses, confirming the presence of industrial and economic growth. However, approximately 47% of administrative districts in Busan are experiencing a decline in both registered residents and living populations, indicating ongoing regional decline. Urgent measures are needed for enhancing urban vitality. The study emphasizes the necessity of utilizing living population data as an urban planning indicator, considering the increasing limit distance of urban activities and growing interregional interaction due to advancements in transportation and communication.

• Journal of the Society of Disaster Information
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• v.18 no.1
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• pp.51-62
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• 2022

Purpose: This study analyzes accessibility of outdoor evacuation places for earthquake and the accessibility improvement effects when expanding the evacuation places in accessibility-deficient areas. In order to consider real-world evacuees, the accessibility analysis is based on service population not on resident population. Method: Location-allocation model as a GIS-based spatial optimization mode is used to analyze accessibility and vulnerable areas to evacuation places. Of location-allocation problem types, 'Maximize Coverage' method is chosen to allocate as many potential evacuees as possible to evacuation places. And impedence cutoffs or evacuation distances (times) are applied to three classes: 500m (7.5 minutes), 1,000m (15 minutes), and 1,500m (22.5 minutes). Case study area is Jung-gu areas, Seoul as a high-density downtown area. Result: Results show that accessibility-deficient areas and population to evacuation places are much more in service population than in resident population. Accessibility is significantly improved when increases when expanding the evacuation places in accessibility-deficient areas. Yet, accessibility-deficient areas are still remained since available lands are insufficient in the high-density downtown area. Conclusion: The study suggests that temporary evacuation facilities like outdoor evacuation places for earthquake need to consider real potential evacuees based not only on resident population but also on service population. Also, policy measures to provide emergency shelters need to more utilize spatial optimization tools like location-allocation model.

• Korea journal of population studies
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• v.28 no.1
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• pp.313-343
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• 2005

오늘날 환경문제는 범지구적이며 인류의 생존 자체를 위협할 만큼 심각하다. 산업화가 환경문제 발생의 근원적 원인이다. 하지만 자연관, 자연에 대한 지식 증가, 기술개발, 경제성장과 불평등 등도 환경문제 발생의 중요한 원인들이다. 인구는 사회가 성립하는 데 필요한 요소이지만 환경문제 발생의 한 원인이 되기도 한다. 그 이유는 인구가 지탱되는 데 필요한 의식주는 전적으로 자연자원에 의존하고 있는데 인구의 크기는 자연이 감당할 수 있는 용량을 초과했기 때문이다. 이러한 관점은 인구와 환경의 관계에서 인구를 하나의 집합체로 보고 양적으로 접근한다. 그러나 환경문제 발생원으로서는 인구는 질적 차원에서도 접근할 필요가 있다. 즉 집합체로서의 인구를 구성하는 개별 행위자들이 일상생활에서 얼마나 친환경적 행동을 하는 가라는 점도 파악돼야 한다. 왜냐하면 절대 인구수가 같더라도 전체로서의 인구를 구성하는 개별 행위자들의 자연관, 생활양식 등에 따라 자연에 전개하는 행동이 다르고 결국 자연에 가해지는 영향(impact)이 다르기 때문이다. 집합체로서의 인구가 환경문제 발생원인으로 의히마는 바는, 자연자원의 공급량을 훨씬 초과해 추출한다는 점과 자연이 흡수 처리할 수 있는 능력 이상으로 생산${\cdot}$유통${\cdot}$소비과정에서 과도하게 폐기물을 발생시킨다는 점이다. 반면 개별 행위자로서의 인구가 환경문제 발생원인으로 의미하는 바는 풍요성과 편리성을 극대화시키고 일상생활에서 친환경적이지 않은 행동을 무분별하게 한다는 점이다. 이런 맥락에서 이 연구는 환경문제의 본질을 먼저 논의했고 환경문제 발생 메커니즘에 인구가 어떤 방식으로 적용하는 지를 두 가지 차원 - 집합체로서의 인구와 개별 행위자로서의 인구 - 에서 논의하였다.

• Proceedings of the Population Association of Korea Conference
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• 2006.12a
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• pp.155-189
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• 2006

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.39 no.6
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• pp.457-467
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• 2021

This paper aims to analyze changes in urban space use due to social distancing measures for COVID-19 using de facto population data in Seoul during daytime, which is estimated by Seoul Metropolitan Government and telecommunication company of KT using public big data and LTE signal data. The result of kernel density estimation and spatial autocorrelation analysis shows that the distribution patterns of de facto population in 2019 and 2020 were generally similar. This is a result of showing that the government's social distancing measures enabled a certain level of normal activities while suppressing the spread of COVID-19. However, analyzing de facto population subtracting 2019 from 2020 showed different results at the micro level. De facto population decreased in commercial areas but increased in residential areas. This means that COVID-19 social distancing measures had spatially uneven effect. The results of analyzing the effect of regional, land use, economic, educational, and accessibility characteristics on the changes of de facto population using spatial regression analysis are as follows. The higher the density of commercial facilities, the more businesses subject to regulations and schools and universities that require non-face-to-face classes, the more de facto population decreased. Conversely, it was found that de facto population increased in areas with many houses and parks due to telecommuting.

• Proceedings of the Population Association of Korea Conference
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• 2006.12a
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• pp.247-266
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• 2006

• The Korean Journal of Applied Statistics
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• v.33 no.6
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• pp.697-712
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• 2020

New infectious diseases have broken out repeatedly across the world over the last 20 years; COVID-19 is causing drastic changes and damage to daily lives. Furthermore, as there is no denying that new epidemics will appear in the future, there is a continuous need to develop measures aimed towards responding to economic damage. Against this backdrop, the living population is an important indicator that shows changes in citizens' life patterns. This study analyzes time-based and socio-environmental characteristics by detecting and classifying changes in everyday life caused by COVID-19 from the perspective of the floating population. k-shape Clustering is used to classify living population data of each of the 424 dong's in Seoul measured by the hour; then by applying intervention analysis and One-way ANOVA, each cluster's characteristics and aspects of change in the living population occurring in the aftermath of COVID-19 are scrutinized. In conclusion, this study confirms each cluster's obvious characteristics in changes of population flows before and after the confirmation of coronavirus patients and distinguishes groups that reacted sensitively to the intervention times on the basis of COVID-related incidents from those that did not.

• 농업기술회보
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• v.43 no.6 s.507
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• pp.8-19
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• 2006

과연 우리 농촌을 어떻게 지킬 것인가? 에 대한 물음에 이제까지의 인구증가에 기인한 상품과 소득 향상 위주의 공장 집약적 ‘생산성 농업론’에서 인구 감소시기를 맞이하여 생산자와 소비자인 사람 위주의 ‘생활 농업론’으로 우리의 눈을 돌려야 할 것이다. 이에 후계자(사람)를 갖고 있는 지속가능한 생활 농업론 즉 소량 다품목 중심의 자급자족적인 생활농, 겸업농을 창출하여 그들이 쾌적하고 자랑스럽게 살며 더불어 도시민은 양질의 농산물을 먹을 수 있는 도농상생의 농촌의 삶의 공간 형성이라는 최종 목표로 연구를 하고 있는 일본 쿠마모토대학 도구노 교수의 생활 농업론을 소개하고자한다.

• Korean Journal of Ecology and Environment
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• v.46 no.3
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• pp.395-408
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• 2013

Environmental condition can induce changes in early life-history traits in order to maximise the ecological fitness. Here I investigated how temperature change and variation in human aquatic activity/behaviour affect early life-history consequences in fish using a dynamic-state-dependent model. In this study, I developed a general fish's life-history model including three life-history states depend-ing on foraging activity, such as body mass, mass of reproductive tissue (i.e., gonadal development) and accumulated stress (i.e., cellular or physiological damage). I assumed the level of foraging activity maximises reproductive success-ultimately, fitness. The model predicts that growth rate, development of reproductive tissues and damage accumulation are greater in higher temperature whereas higher human aquatic activity rapidly reduced the growth rate and development of reproductive tissue and increased damage accumulation. While higher foraging activity in higher temperature is less affected by human aquatic activity, the foraging activity in lower temperature rapidly declined with human aquatic activity. Moreover, lower survival rate in higher temperature or human aquatic activity was independent on mortality rate due to human aquatic activity or mortality rate when foraging activity, respectively. However, the survival rate in lower temperature or human aquatic activity was dependent on these mortality rates. My findings suggest that including of early life-history traits in relation to climate-change and human aquatic activity on the analysis may improve conservation plan and health assessment in aquatic ecosystem.

• Korea journal of population studies
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• v.27 no.2
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• pp.231-255
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• 2004

본 연구의 목적은 경상북도 경산지역에 거주하는 65세 이상 노인들의 치매실태를 알아보고 치매노인들의 인구학적 특성 및 생활 습관적 특성을 알아보는데 있다. 본 연구에서는 모집단의 약 6%에 해당하는 1,120 명을 표본으로 추출하여 한국형 간이정신상태 검사를 포함한 면담표를 이용하여 2003년 8월 1일부터 2003년 9월 2l일까지 수행되었다. 면담에 응하지 않거나 분석 자료로 활용할 수 없는 160 사례를 제외한 960 사례가 최종분석에 이용되었다. 본 연구에서 밝혀진 내용은 다음과 같다. 한국형 간이정신상태 검사에 따르면 응답자들의 10.6%가 치매에 이환된 것으로 나타났으며 그들 가운데 54.9%는 경증, 31.4%는 중등증, 13.7%는 중증이었다. 치매노인들의 인구학적 및 생활 습관적 특성을 알아보기 위하여 교차분석을 도입하였으며 치매에 영향을 미치는 인구학적 및 생활 습관적 특성들을 경험적으로 규명하기 위하여 로지스틱회귀분석을 사용하였다. 로지스틱회귀분석 결과 정신노동에 관련된 직업에 종사했던, 규칙적인 운동을 하는 응답자, 규칙적 식사를 하는 사람과 적당량의 음식을 섭취하는 응답자들이 치매이환의 대수승산을 감소시키는 것으로 밝혀졌으며 통계적으로 유의미한 것으로 나타났다. 반면 나이가 높을수록 노인들의 치매이환의 대수승산을 증가시키는 것으로 밝혀졌다. 끝으로 노인들의 치매이환을 감소시키기 위한 여러 가지 정책적 대안들을 논의하였다.