• 한국지역사회생활과학회지
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• 제28권4호
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• pp.653-667
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• 2017

The purpose of this study were to investigate the socio-economic impacts of urban-to-rural migration on the rural community and to identify the factors influencing rural residents' recognition of the socio-economic impacts of urban-to-rural migration on the rural community. For the purpose, this study analyzed Korea Rural Economic Institute's rural residents survey(2016), using multiple regression model. The main finding of this study were as follows: Positive social impacts of urban-to-rural migration on rural community were (1) contributing to community sustainability through population growth, (2) contributing to securing agricultural human resources, and others. Negative social impacts of urban-to-rural migration on rural community were (1) increasing unnecessary complaints and deepening distrust, (2) weakening of community consciousness, and others. Positive economic impacts of urban-to-rural migration on rural community were (1) increasing the value of residents' property, (2) contributing to local finance through increased local tax revenue, and others. Negative economic impacts of urban-to-rural migration on rural community were (1) difficulty of scaling farmland due to small-scale farming, (2) land shortage caused by rising land prices, and (3) fierce competition to secure labor force. According to the multiple regression analysis, the major factors influencing rural residents' recognition of the socio-economic impacts of urban-to-rural migration were (1) villagers' general attitude toward urban-to-rural migrants, (2) urban-to-rural migrants' community participation, (3) age, and (4) fitness of village in urban-to-rural migration.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1998년도 The Third Asian Fuzzy Systems Symposium
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• pp.489-494
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• 1998

This paper describes a design of graphical user interface for a simulated breeding tool with multifield. The term field is used here as a population of visualized individuals that are candidates of selection. Multi-field interface enables the user to breed his/her favorite phenotypes by selection independently in each field, and he/she can copy arbitrary individual into another field. As known on genetic algorithms, a small population likely leads to premature convergence trapped by a local optimum, and migration among plural populations is useful to escape from local optimum. The multi-field user interface provides easy implementation of migration and wider diversity. We show the usefulness of multi-field user interface through an example of a breeding system of 2D CG images.

• 대한지리학회지
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• 제51권1호
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• pp.167-184
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• 2016

본 논문은 중국 조선족의 이주과정을 시기별로 해석하고 각 시기에 따른 이주공간의 변화를 조선족 인구분포의 변화를 통해 밝히려고 하였다. 중국 조선족의 이주는 19세기 말부터 본격적으로 일어났으며, 1910년까지의 난민 월경기, 1930년까지의 정치 이주기, 1945년까지의 강제 이주기, 그리고 해방이후 최근까지의 경제 이주기로 나누어 그 특징을 고찰할 수 있다. 1910년대와 1930년대, 2000년대의 변화과정을 고찰하면 중국 조선족의 이주는 벼농사의 재배와 밀접한 관련이 있으며 초기에는 국경 인근에 벼농사가 유리한 지역으로 우선 이주가 시작되어 그 주변으로 조선족 취락이 확대되는 접촉확산으로, 1930년대 강제이주에 따라 철도를 따라 집단촌이 건설되고 2000년 이후 연해도시를 중심으로 집적지가 확대되는 계층확산으로 해석이 가능하다. 중국 조선족의 디아스포라 공간은 초기에 형성된 인구밀집지에서 지속적으로 인구가 증가하고 안정적으로 유지되었으나, 최근 농촌공동체에서 도시공동체로 변화하고 동북3성 위주의 단일지역 분포 패턴에서 연해 대도시와 해외이주가 포함된 다지역 분포 패턴으로 변화하고 있다.

• 대한지리학회지
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• 제51권6호
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• pp.837-851
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• 2016

이 연구는 우리나라 대표적인 기업도시 중 하나인 광양시를 사례로 2001~2010년간 인구이동과 인구 구조의 변화를 고찰하였다. 광양시 인구는 1981년 이후 지속적으로 증가해 2001년 138,468명에서 2010년 145,512명으로 늘어났다. 인구증가로 2010년 인구구조에서 30대와 40대 비중이 전체의 35%를 차지하였다. 2001~2010년 동안 순이동은 -2,925명으로 전출초과를 보였지만, 2008년 이후에는 19세 이하 연령층을 제외한 모든 연령층에서 전입초과를 나타냈고 전입 사유는 직업(49.5%)이 가장 많았다. 광양시 인구증가와 전입 초과에 영향을 미친 요인은 광양제철소와 제철관련 기업의 입지, 광양컨테이너부두 건설과 개항, 광양만권경제 자유구역 지정과 관련된 개발사업, 이들 대형 국책사업과 연계되어 추진한 광양시의 지역정책 등이었다. 결과적으로 광양시에서 행해진 각종 지역개발사업으로 제조업 관련 사업체가 증가하였고, 사업체 증가는 젊은 전입자 증가와 출생자 증가로 전이되어 광양시 인구가 증가하였다.

• The Korean Journal of Physiology and Pharmacology
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• 제27권3호
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• pp.257-265
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• 2023

Kidney ischemia/reperfusion (I/R) injury, a common cause of acute kidney injury (AKI), is associated with the migration of inflammatory cells into the kidney. Ras-related C3 botulinum toxin substrate 1 (Rac1), a member of the Rho family of small GTPase, plays an important role in inflammatory cell migration by cytoskeleton rearrangement. Here, we investigated the role of Rac1 on kidney I/R injury and macrophage migration. Male mice were subjected to either 25 min of bilateral ischemia followed by reperfusion (I/R) or a sham operation. Some mice were administrated with either NSC23766, an inhibitor of Rac1, or 0.9% NaCl (vehicle). Kidney damage and Rac1 activity and expression were measured. The migration and lamellipodia formation of RAW264.7 cells, mouse monocyte/macrophage, induced by monocyte chemoattractant protein-1 (MCP-1, a chemokine) were determined using transwell migration assay and phalloidin staining, respectively. In sham-operated kidneys, Rac1 was expressed in tubular cells and interstitial cells. In I/R-injured kidneys, Rac1 expression was decreased in tubule cells in correlation with the damage of tubular cells, whereas Rac1 expression increased in the interstitium in correlation with an increased population of F4/80 cells, monocytes/macrophages. I/R increased Rac1 activity without changing total Rac1 expression in the whole kidney lysates. NSC23766 administration blocked Rac1 activation and protected the kidney against I/R-induced kidney damage and interstitial F4/80 cell increase. NSC23766 suppressed monocyte MCP-1-induced lamellipodia and filopodia formation and migration of RAW 264.7 cells. These results indicate Rac1 inhibition protects the kidney against I/R via inhibition of monocytes/macrophages migration into the kidney.

• 지역연구
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• 제40권1호
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• pp.53-67
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• 2024

지역이탈은 모든 비수도권 지역에서 겪고 있는 문제이지만, 지역 특성과 경제 여건에 따라 그 정도는 다를 것이다. 본 연구는, 인적 요인이 같을 때, 태어나고 성장한 지역의 경제 여건에 따라 청년의 지역이탈 양상과 정도가 다른지 분석하였다. 시·군·구 단위의 분석 결과 청년 이탈은 인구감소와 고령화 수준이 높고, 경제 규모와 재정이 취약한 지역일수록 더 심각하였다. 특히 의료시설을 제외한 상업·교육·문화시설은 청년 이탈을 억제하지 못하였다. 또한 출신 지역과 무관하게 수도권 취업자와 지역 취업자 간에는 유의한 임금 격차가 나타났다. 이는 우리나라 비수도권 지역이 지역 경제 악화와 청년 이탈의 악순환 고리에 빠져있음을 시사한다.

• 한국인구학
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• 제10권2호
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• pp.82-98
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• 1987

The urban population in Asia more than doubled between 1960 and 1985, growing by 3.0 percent per annum on average. Yet during that period, the proportion of the total population living in urban areas increased only from 21 to 27 percent. This seeming paradox is explained by the relatively high rates of rural population growth in Asia, which averaged 1.8 percent over the same period. The Republic of Korea has experienced the most rapid rate of urbanization in Asia during the past century. The proportion urban jumped from 28 percent in 1960 to 65 percent in 1985. There is a clear association between economic growth and the pace of urbanization in Asia. Currently natural increase accounts for about 60 percent of urban growth, but the speed of urbanization is projected to increase after 1990, and migration, reclassification and annexation will comprise about half of urban growth, Seoul is currently the fourth largest urban agglomeration in Asia, and its population is projected to be over 13 million by the end of the century. It is argued that policies to deconcentrate urban population will not be generally successful in Asia and that governments should attempt to manage the growth of large metropolitan areas more efficiently.

• Journal of the Korean Statistical Society
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• 제10권
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• pp.145-157
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• 1981

Regional relocation of population in Korea is required strongly from natural and environmental sides for substantial growth of economy and the rigorous revival national economy against especially internationalization. This paper aimed for analysed the population distribution by regional and special characteristics of the inter-migration and showed the direction of population policy through the model building. Relocation methods of population by region has been examined through the process from the approach method by Haurin's production function to the approach by the utility function. The examination of the development model is done efficiently, how utility these approach models are depends on that scientific and composite plan for population problems against forced policy should be taken precedence.

• International Journal of Computer Science & Network Security
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• 제21권3호
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• pp.257-265
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• 2021

Modern methods of regulating migration processes in EU states include a wide variety of adapted, transformed under the sway of globalization tools in order to influence the movement of human capital within the European space. The main purpose of the regulatory policy on migration flows is the redistribution of professionally competent professionals between different spheres of life. Herewith, the determining factor in the effectiveness of such distribution is a rational combination of stimulating and disincentive levers of influence on the movement of citizens of different EU countries and taking into account the motives of such mobility. Modernization of migration management approaches can be a major economic, social, political and cultural progress of European countries. The purpose of the research is to conduct a detailed analysis of existing practices of migration flow management, in particular their stimulation or containment, and to outline key migration trends formed under the influence of multicomponent approaches to migration regulation, transformation of regulatory legislation and changing priorities of modern society. The research methods: statistical-analytical method; ARIS method; method of tabular, graphical and analytical modeling; comparative analysis; systematization, generalization. Results. Current pan-European methods of regulating migration processes are insufficiently adapted to the multinational socialeconomic space; consequently, there are some disparities in the distribution of migrants between EU countries, although the overall dynamics of migration is positive. Fluctuations in the population of European countries during 2000-2019 and trends in the transformation of social-economic space confirm the insufficient level of influence of current methods of regulating migration flows. Along with this, the presence of a characteristic asymmetry in the distribution of migrants requires a greater focus on the modernization of regulatory instruments, in particular, the regulatory mechanism for managing migration processes. As a result of the conducted study, further prospects for the implementation of alternative methods of regulating migration processes in EU states have been outlined; the current and projected limits for increasing the level of observance of migrants' rights at the European level have been clarified through the adoption of appropriate regulatory acts; effective solutions for intensifying the influx of high-quality labor resources from different countries to EU have been identified. The research results can be used to study methods of regulating migration processes in the countries in the global dimension.

• Journal of Ecology and Environment
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• 제30권4호
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• pp.287-292
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• 2007

We monitored a breeding population of the Asian toad (Bufo gargarizans), in the Wonheunge pond at Sannamdong, Chungju, from 5 March to 11 April, 2006 and 14 February to 31 March, 2007 to investigate their movement patterns, breeding population sizes, and physical characteristics. Terrestrial migration to the pond started on 5 March in 2006 and 14 February in 2007. We captured a total of 266 immigrating individuals (213 males, 53 females) in 2006 and 307 (222 males, 85 females) in 2007, and found 50 adults apparently killed by motor vehicles while migrating to the pond in 2007. Emigration from the pond to terrestrial sites started on 15 March 2006 and 5 March 2007. We captured a total of 245 emigrating toads (181 males, 65 females) in 2006 and 99 (92 males, 7 females) in 2007. An additional 10 emigrating adults were found dead on the road. During both the immigration and emigration periods, two peaks in capture frequency appeared for each sex in each breeding season. The immigration peaks corresponded with higher temperatures, while the emigration peaks corresponded with high humidity. Migrating Asian toads showed sexual size dimorphism and a male-biased sex ratio. Body weights and SVL (snout-vent length) of immigrating and emigrating individuals were negatively related with migration dates.