Relationship Between the Formation Conditions and Durations of One-Person Households in the Seoul Metropolitan Region

Demography ◽  
2016 ◽  
Vol 53 (3) ◽  
pp. 675-697 ◽  
Author(s):  
Changhyo Yi
Keyword(s):  
Metropolitan Region ◽  
Formation Conditions ◽  
Seoul Metropolitan Region

scholarly journals Response to COVID-19 in South Korea and implications for lifting stringent interventions

BMC Medicine ◽  
2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Amy Dighe ◽  
Lorenzo Cattarino ◽  
Gina Cuomo-Dannenburg ◽  
Janetta Skarp ◽  
Natsuko Imai ◽  
...  
Keyword(s):  
South Korea ◽  
High Volume ◽  
Individual Case ◽  
Metropolitan Region ◽  
Contact Tracing ◽  
Social Distancing ◽  
Early Adoption ◽  
The Usa ◽  
Sharp Growth ◽  
Seoul Metropolitan Region

Abstract Background After experiencing a sharp growth in COVID-19 cases early in the pandemic, South Korea rapidly controlled transmission while implementing less stringent national social distancing measures than countries in Europe and the USA. This has led to substantial interest in their “test, trace, isolate” strategy. However, it is important to understand the epidemiological peculiarities of South Korea’s outbreak and characterise their response before attempting to emulate these measures elsewhere. Methods We systematically extracted numbers of suspected cases tested, PCR-confirmed cases, deaths, isolated confirmed cases, and numbers of confirmed cases with an identified epidemiological link from publicly available data. We estimated the time-varying reproduction number, Rt, using an established Bayesian framework, and reviewed the package of interventions implemented by South Korea using our extracted data, plus published literature and government sources. Results We estimated that after the initial rapid growth in cases, Rt dropped below one in early April before increasing to a maximum of 1.94 (95%CrI, 1.64–2.27) in May following outbreaks in Seoul Metropolitan Region. By mid-June, Rt was back below one where it remained until the end of our study (July 13th). Despite less stringent “lockdown” measures, strong social distancing measures were implemented in high-incidence areas and studies measured a considerable national decrease in movement in late February. Testing the capacity was swiftly increased, and protocols were in place to isolate suspected and confirmed cases quickly; however, we could not estimate the delay to isolation using our data. Accounting for just 10% of cases, individual case-based contact tracing picked up a relatively minor proportion of total cases, with cluster investigations accounting for 66%. Conclusions Whilst early adoption of testing and contact tracing is likely to be important for South Korea’s successful outbreak control, other factors including regional implementation of strong social distancing measures likely also contributed. The high volume of testing and the low number of deaths suggest that South Korea experienced a small epidemic relative to other countries. Caution is needed in attempting to replicate the South Korean response in populations with larger more geographically widespread epidemics where finding, testing, and isolating cases that are linked to clusters may be more difficult.

scholarly journals Elevated Ozone Layers over the Seoul Metropolitan Region in Korea: Evidence for Long-Range Ozone Transport from Eastern China and Its Contribution to Surface Concentrations

2010 ◽  
Vol 49 (2) ◽  
pp. 203-220 ◽  
Author(s):  
In-Bo Oh ◽  
Yoo-Keun Kim ◽  
Mi-Kyung Hwang ◽  
Cheol-Hee Kim ◽  
Soontae Kim ◽  
...  
Keyword(s):  
Long Range ◽  
Transport Process ◽  
Surface Ozone ◽  
Eastern China ◽  
Metropolitan Region ◽  
Long Range Transport ◽  
Pressure System ◽  
Elevated Ozone ◽  
Range Transport ◽  
Seoul Metropolitan Region

Abstract Elevated layers of high ozone concentration were observed over the Seoul metropolitan region (SMR) in Korea by ozonesonde measurements during 6–9 June 2003. An analysis of the synoptic-scale meteorological features and backward trajectories revealed that the layers were associated with the long-range transport of ozone from eastern China. Further examination of the long-range transport process responsible for the development of these layers was performed using the Community Multiscale Air Quality (CMAQ) model. CMAQ demonstrated that the upward mixing of ozone by convective activity in eastern China and subsequent horizontal transport aloft in the periphery of a slow-moving high pressure system led to the development of thick ozone layers over the SMR. Through comparative simulation studies, it was found that the surface ozone levels in the SMR can be significantly enhanced by the vertical down-mixing of ozone from the layer aloft with the growing mixed layer. On average, about 25% of the surface peak concentration in a given area during a high-ozone episode was due to the influence of the ozone layer aloft developed by the long-range transport process.

Industrial Restructuring and the Spatial Division of Labor: The Case of the Seoul Metropolitan Region, the Republic of Korea

1993 ◽  
Vol 25 (1) ◽  
pp. 81-93 ◽  
Author(s):  
S O Park
Keyword(s):  
Division Of Labor ◽  
Industrial Development ◽  
Corporate Strategy ◽  
Spatial Separation ◽  
Metropolitan Region ◽  
Industrial Restructuring ◽  
High Tech ◽  
Regional Characteristics ◽  
Seoul Metropolitan Region

This paper is an overview of an industrial restructuring and spatial division of labor in the Seoul metropolitan region, with a focus on the role of the Korean government, corporate strategy, and regional characteristics in controlling labor and capital. The spatial division of labor that appeared in the 1970s was related mainly to the Korean government's promotion of the rise of large enterprises to institutionalize heavy and chemical industrial development. Since the 1980s, in addition to the role of the state, corporate strategy and regional characteristics have been regarded as important factors for understanding the undergoing industrial restructuring. Concentration and development of high-tech industries in the Seoul metropolitan region during the 1980s have progressed with evolving intensified spatial division of labor beyond the spatial separation of headquarters and production units. The evolution of intensified spatial division of labor is the result of corporate strategy which regionally separates technical workers from production workers on the one hand, and corporate strategy in utilizing regional characteristics from the government's decentralization policy on the other hand.

scholarly journals A Machine Learning Approach to the Residential Relocation Distance of Households Living in the Seoul Metropolitan Region

2018 ◽  
Author(s):  
Changhyo Yi ◽  
Kijung Kim
Keyword(s):  
Machine Learning ◽  
Residential Mobility ◽  
Ordinary Least Squares ◽  
Metropolitan Region ◽  
Learning Approach ◽  
Least Squares Regression ◽  
Mobility Patterns ◽  
Residential Relocation ◽  
Machine Learning Approach ◽  
Seoul Metropolitan Region

This study aimed to ascertain the applicability of a machine learning approach to the description of residential mobility patterns of households in the Seoul metropolitan region (SMR). The spatial range and temporal scope of the empirical study were set to 2015 to review the most recent residential mobility patterns in the SMR. The analysis data used in this study involve the microdata of Internal Migration Statistics provided by the Microdata Integrated Service of Statistics Korea. We analysed the residential relocation distance of households in the SMR by using machine learning techniques such as ordinary least squares regression and decision tree regression. The results of this study showed that a decision tree model can be more advantageous than ordinary least squares regression in terms of the explanatory power and estimation of moving distance. A large number of residential movements are mainly related to the accessibility to employment markets and some household characteristics. The shortest movements occur when households with two or more members move into densely populated districts. In contrast, job-based residential movements have relatively longer distance. Furthermore, we derived knowledge on residential relocation distance, which can provide significant information on the urban management of metropolitan residential districts and the construction of reasonable housing policies.

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