• Journal of Korean Society of Transportation
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• v.34 no.3
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• pp.222-233
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• 2016

Recently, mobile phone data was applied in travel demand modeling as a new source of dynamic population movement. This study is also aimed to estimate "occupancy population" during a given period of time within a given spatial region using mobile phone data. An occupancy population was defined as the number of people residing or moving within a given time and space. In case of Seoul Metropolitan area, we divided the area into a number of administrative districts as zones for analysis and estimated the occupancy population of each zone by mobile phone data collected by SK telecom Co., a wireless telecommunication provider in Korea. For the expansion of mobile phone data, a new concept of "communication probability" was introduced and applied in the estimation of occupancy population of each zone by the hour. We compared the estimated number with the daytime population and the daytime population index referred by the Statistics Korea. The results showed that a positive correlation existed between the estimated number and the statistical number by nationwide survey. It was concluded that mobile phone data could be more cost-effective sources than a conventional survey method to estimate the pattern of population movement by the hour or by the day.

• Korean Journal of Remote Sensing
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• v.27 no.1
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• pp.69-74
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• 2011

It may be an important issue to estimate population of a concerned country. In this study, an appropriate variable was selected to establish a model which fits best the relationship between the night time imagery of DMSP-OLS and population data. Exponential model was selected which was proposed by previous study. Accuracy validation was also performed for each variable extracted from the night time imagery of DMSP-OLS. Consequently, the model showed high accuracy when applied to the area of a certain amount of light was existed. However, further consideration should be necessary when to applied other country or other part of regions.

• Land and Housing Review
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• v.15 no.3
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• pp.1-23
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• 2024

In the face of an impending demographic cliff, this research delves into geographical disparities in socioeconomic statuses and living arrangements of young single women in rental housing and also to explore influential factors of their residential assessment and housing expenditure. From the Korean Housing Survey of 2020, the cross-sectional study identified 847 unmarried female single-person householders aged between 20 and 39 in four districts - Seoul and Gyeonggi-Incheon Area (GIA) of Seoul Metropolitan Area (SMA), and metropolises and non-metropolises of non-SMA. The empirical analyses revealed that regardless of regions, most of the respondents were college-educated, salaried employees in late 20s living in a studio flat, seldom bore debt and barely relied on social services. Renters in SMA, employment rate, income and living expenses were higher than those in non-SMA and they resided in small, old but adequate housing with a separate bedroom. In particular, Seoulites suffered from housing cost overburden but most singles in GIA benefited from the lowest housing burden. While the main determinant of residential assessment was livability, housing satisfaction was additionally affected by old housing and the satisfaction with residential environment was also explained by urban amenities. Despite geographical variations, housing expenditure was primarily driven by income and employment.

• The Journal of the Korea Contents Association
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• v.19 no.8
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• pp.535-543
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• 2019

This study was conducted to find a pathway from the general government debt to GDP ratio(GDR) to the age standardized Suicide Rate(suicide rate). The variables used in this study are GDR, the consumer price index for living necessaries(CPIL), the household debt to GDP ratio(Household Debt), and suicide rate. The data used in this study were standardized data from 2001 to 2015 of Korean Statistical Information Service(KOSIS) and the path analysis was performed using the analysis IBM SPSS 22 and Amos. As a result of the path analysis, the path of GDR-CPIL-Household Debt-Suicide rate, and the direct of effect were in order 0.954, 0.904 and 0.675 were confirmed. The indirect effect of GDR on Household Debt is 0.862, GDR on Sucide Rate is 0.581, CPIL on Suicide Rate is 0.610. Neither of these indirect effect coefficient was significant(p>0.05).

• Korea journal of population studies
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• v.35 no.1
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• pp.77-99
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• 2012

This study aimed at developing a model for estimating fertility rates for Korea under some conditions. The model is expected to provide the basic information for establishing and evaluating the polices in prompt and adequate response to low fertility and population ageing. The model was established on the basis of experiences by some OECD countries in Europe, having experienced the fertility increase trend and being economically well-developed, because Korea has never experienced the steady increase in fertility rate since 1960. This study collected about 20 years' time series data for each of selected countries and applied to the regression model, which is called a 'panel analysis' to take into considerations both cross-sectional and longitudinal aspects of fertility change simultaneously. Simulation of the model for Korea and some panel countries showed a very small difference, less than 0.1, between the estimated rate and the observed rate for each year during 2006~2010. Thus, the model, as established in this study, is evaluated as accurate or well-fitted to a considerable extent.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2023.11a
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• pp.353-354
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• 2023

과거와 달리 유독가스가 생성되는 화재, 폭발, 화학사고 및 급격한 기압차를 경험하게 되는 선박 침몰 구조 등 다양한 재난 혹은 사고 상황에서 고압산소치료가 욕구되며, 이를 수행할 수 있는 고압산소치료챔버는 재난에 대응하는 핵심 자원으로 그 수량과 배치가 적절해야 한다. 따라서 다양한 종류의 재난에서 발생하는 유독가스 피해자에게 고압산소치료는 필수적이나 본 연구에 의하면 국내에는 고압산소치료챔버의 숫자와 동시에 고압산소치료로 수용할 수 있는 환자수에도 한계가 있고 그 분포의 불균형도 존재하고 있어 재난 시 인명 피해 감소의 기반 장비, 시설로서 고압산소챔버의 균형있는 확산, 적용이 시급한 실정이며, 이는 가칭 재난고압산소지수로 객관화할 수 있다. 국내에서는 인구밀집지역인 수도권이 고압산소치료가 필요한 재난에 대한 대응 기반이 부족하다가 향상되고 있으며 부산, 경남 권역에 고압산소치료 자원이 편중된 현상을 보이고 있다. 고압산소치료 필요한 대량의 중환자 발생 시는 국내 전체의 고압산소치료기 활용 여부에 대한 실시간 모니터링 시스템이 필요하고 필요 시 원거리 피해자 전원 시스템을 갖추어야 하므로 이는 향후 구축해야 할 사항으로 이를 위한 전국적 고압산소치료기 모니터링 시스템이 필요하다.

• Journal of Environmental Policy
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• v.9 no.4
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• pp.53-76
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• 2010

This paper attempts to estimate and compare environmental Kuznets curves (EKC) for$CO_2$ emissions of five regions constituting South Korea. For this, panel data of $CO_2$ emission for these regions are constucted for the period 1990 - 2007. Close inter-dependency among these five regions is considered by using a seemingly unrelated regression (SUR) model. In addition to real per-capita income, price index of energy sources and population dens ity are included as control variables. Results of estimates show the robust existence of EKC's in all these regions. EKC turning points of five regions range between 13.7 and 21.6 million Korean Won, showing a large variation. This difference among regions should be conisidered for the effective implementation of policies targeting the reduction of $CO_2$ emmission. In addition, the increase of energy price is found help reduce the $CO_2$ emmision while the rise of population density seems to lead to the increase of $CO_2$ emission.

• Korea journal of population studies
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• v.30 no.2
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• pp.117-146
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• 2007

The research reported in this paper suggests an index of a 'good job' and validates it in several different ways. Not much is known yet, it is emphasized, about what the defining characteristics of a good job are and what the causes and major consequences are resulting from the attainment of such job. This is not merely because relatively little attention has been paid to construct a usable index, but also because a few studies, if any, were often plagued with several limitations, some theoretical and other analytical. As a consequence, fragmented speculations and research findings tended to flourish in the shortage of an overarching conceptualization and rigorous empirical assessment. In particular, a comprehensive index that encompasses a few critical job characteristics based on some solid theoretical underpinnings was in thirsty want. To relieve this want, the current study tries to formulate such index and validate it. A covariance structure analysis of representative national sample survey (Korean General Social Survey) data in South Korea indicates that wage, occupational prestige, authority and job security are the defining characteristics of a good job and that the index consisting of these characteristics is generally valid with respect to its constituent attributes, antecedents and a consequence, thereby supporting its discriminant-convergent and construct validities. The findings are interpreted with providing a few substantive implications stemming from them.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.27 no.2
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• pp.193-212
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• 2016

The purpose of this paper is to explain the necessity of secure budget in public libraries with regard to promoting library usage. It is namely to attempt to find out if there really is a connection between library funding and library usage. For this purpose, the relevant data of all the 31 public libraries in Busan were collected from the 2013 National library Statistics of Korea. To determine the connection between library funding and usage, two variables were selected, 'TFI (Total Funding Indicator) = $\sqrt{personnelcosts{\times}materialcosts}$' for independent variable and 'LU (Library Usage) = (visits per year) + (loans per year)/number of inhabitants' for dependent variable. The results showed that there is a clear relationship between TFI and LU and If more cost is spent on personal resources and material resources, the total usage of the public library also increase. The findings are limited due to the fact that the observation was focusing on public libraries in one community and the period of observation was one year in 2013.

• Korea journal of population studies
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• v.25 no.1
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• pp.33-50
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• 2002

This study examines cross-national patterns of asymmetry of marriage tables with respect to educational level and tries to measure the degree of gender inequality across nations. A Primary assumption of the study is that gender inequality inhibits symmetric marriage between men and women. As men and women differ more in status, the rate of symmetric marriage between them declines thus producing asymmetric marriage with respect to social status. More specifically, the main object of the study is to develop statistical models and index with which to assess the patterns and degree of asymmetric marriage. Additionally, it is intended to assess the appropriateness of several theoretical perspectives for explaining these variations identified by the statistical models. Two most important such perspectives are industrialism and theory of politics and culture. To answer these questions, this study relies on twenty-seven marriage tables with respect to educational level, some from published tables, and some extracted from other sources. The main findings of the study are: (1) compared to less industrialized countries, more industrialized countries have lower degrees of asymmetric marriage(gender inequality) with respect to educational level, and (2) other things being equal, differences in politics and culture seem to have the some impact on marriage pattern; for instance, social democracy and state socialism reduce the degree of asymmetric marriage while the high emphasis on gender-based hierarchy in Asian countries seems to increase it In short, these results suggest a weaker or modified version of industrialists That is, while with economic growth most nations show a decline in the degrees of asymmetric marriage with respect to social status, for some nations the degrees of asymmetric marriage are affected by their specific politics or cultures.