• The Journal of Sustainable Design and Educational Environment Research
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• v.19 no.3
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• pp.1-10
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• 2020

The results of a survey on 113 elementary schools in Jeju-do in December 2018 are as follows: First, the most newly established schools in the last 30 years were long-term decline Type 3 (56 schools), followed by Type 9 (W-type, 24 schools), which was more than 30 years old. Second, one of the main achievements of this study is the discovery of four types (type 1, type 2, type 8 and new-type) that are well characterized by Jeju province. Third, the most smaller school has 50 schools (44.3%) and small schools (less than 300 students) are 77 schools, accounting for 68.1% of the total ; 6 the most largest elementary schools (5.3%), 13 large schools (11.5%), 17 optimal sized schools (15.0%), 27 small schools (23.9%). In particular, it is not an exaggeration to say that almost all schools are small schools except for a few schools in Jejudo Ub-Myun areas. This means that it may cause serious problems if it is adopted as a standard of abolition of small schools in the same standard of management rather than reflecting regional characteristics of Jejudo province.

• Journal of the Korean Geophysical Society
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• v.3 no.4
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• pp.261-268
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• 2000

Minimum magnitudes $(M_c)$ for estimation of seismicity parameters were analyzed for the earthquake catalog of Korea Meteorological Agency (KMA). The temporal variation of earthquake frequency suggests that a proper $M_c$ be 3.0 for the whole southern part of the Korean Peninsula. The b-value with $M_c$ of 3.0 is estimated to be 1.11, which is larger than those of the previous studies. To see the spatial variation of $M_c$, the southern part of the peninsula were divided into grids of $0.1{\times}0.1$ degree. At the greater portion of grid points, the local earthquake catalogs do not satisfy given statistical criteria. The grid points whose local earthquake catalogs meet the criteria mostly distribute in the eastern part. $M_c$ at these points range 2.4 to 3.5 and b values range 0.75 to 1.73 with the average of 1.08 which is comparable to that for the whole southern part of the peninsula.

• Journal of the Korean earth science society
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• v.36 no.7
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• pp.643-648
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• 2015

Equations that could estimate the local magnitude of historical earthquakes, being difficult to calculate, in Sino-Korea craton was obtained using instrumental earthquake data for 22 Korean and 46 northeastern Chinese events. The obtained equations from intensity $I_0$ is $M_L=1.7+0.57{\times}I_0$. The equation from felt area FA for the Korean Peninsula is $M_L=4.29-1.34{\times}log(FA)+0.28{\times}log^2(FA)$. When the information on earthquake damage, effects, and felt area is all recorded at the same time, the former equation of intensity is more feasible than that of felt area due to uncertainty in earthquake felt area.

• Geophysics and Geophysical Exploration
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• v.14 no.3
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• pp.254-260
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• 2011

We studied magnitude determination method using high-frequency energy radiation duration to calculate rapidly magnitude of large earthquakes that occurred around Japan. Fourteen earthquakes were analyzed using Korea Meteorological Administration (KMA) data. We calculated duration of high-frequency energy radiation with 2~4 Hz band pass filter at each data and estimated magnitude. As a result, duration becomes longer as magnitude becomes larger and the magnitude estimated using regional earthquake data are similar to that using teleseismic data. Therefore when an earthquake occurs around Japan we will be able to estimate the magnitude in a relatively short time using KMA data and it may be possible to determine if the earthquake is large enough to produce tsunami.

• KDI Journal of Economic Policy
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• v.19 no.2
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• pp.159-211
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• 1997

환경기초시설에 대한 투자가 우리나라 총 환경관련 예산의 80%이상을 차지하고 있다는 사실에서도 알 수 있듯이, 수질 폐기물의 관리를 위한 기초시설의 건립과 운영은 환경정책의 가장 중요한 부분인 동시에 대규모의 재원을 필요로 하는 사업이며, 따라서 비용극소화를 위한 많은 노력이 요구된다. 환경기초시설의 설치 운영에 소용되는 비용은 크게 두 부류로 나누어지는데, 설치비와 운영비에는 규모의 경제가 있어서 규모가 큰 시설일수록 평균비용이 감소하는 반면, 수거운반비와 보상비는 규모가 큰 시설일수록 평균비용이 증가한다. 따라서 총비용은 시설규모의 U자형 함수가 될 것이며, 이 논문의 목적은 각 비용요소를 계량화하여 환경기초시설의 적정규모, 즉 총비용을 극소화시키는 시설규모를 도출하기 위한 모형을 제시하는 것이다. 이 논문에서 제시한 모형은 수학적으로 단순하여 현실 문제에 쉽게 적용할 수 있으며, 간단한 컴퓨터 프로그램을 통하여 적정규모를 계산하고 비용분석을 할 수 있다. 이 모형을 우리나라의 소각시설에 적용한 결과 다음과 같은 정책적 시사점들을 얻을 수 있었다. 첫째, 생활폐기물의 수거운반비가 1,500원/톤/km이고 가구들이 폐기물 관리지역내에 고르게 분포되어 있다고 가정할 때에 총소각비용을 최소화하기 위해서는 약 23만 가구당 처리용량이 830톤/일인 소각장을 설치 운영하여야 하며, 이때에 폐기물 단위당 처리비용은 약 100원/kg이다. 둘째, 가구당 폐기물발생량과 인구밀도의 지역간 차이로 인하여 적정규모 역시 지역간 차이가 있으며, 우리나라에서는 도시지역일수록 규모가 큰 시설이 효율적이다. 셋째, 폐기물 처리사업은 오염의 원인과 수익의 주체가 분명하므로 처리에 소요되는 비용은 가계가 부담하여야 하며, 이를 위하여 현재의 쓰레기봉투가격을 인상하여야 한다. 넷째, 현재 폐기물 처리시설의 설치 운영이 공공부문에 의하여 이루어지고 있어 이를 민영화하는 것이 바람직한데, 그 이유는 환경기초시설의 적정규모를 도출함에 있어 핵심사항인 비용에 관한 정보를 관련 분야의 민간부문이 더 많이 가지고 있을 가능성이 높으며, 입찰을 통하여 사업자를 선정할 경우 가장 효율적인 기업에 의한 설치 운영이 가능하기 때문이다. 이를 위하여 쓰레기봉투가격의 인상과 함께, 폐기물의 처리가 행정구역에 연계되어 이루어지고 있는 현재의 제도 역시 폐지되어야 한다.

• Journal of the Economic Geographical Society of Korea
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• v.12 no.2
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• pp.142-158
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• 2009

The purpose of this paper is to identify determinants of regional export in Korea using the interregional input-output table and SUR(Seemingly Unrelated Regression) model. Regional exports are classified into four groups; intraindustry intraregional export, interindustry intraregional export, intraindustry interregional export and interindustry interregional export. Labor productivity, scale economies, market size, and international trade volumes have positively influenced regional exports while the interregional distances having a negative effect on them. These results imply that it is necessary to operate regional strategies to enhance productivities and market size and to reduce transportation and distribution costs for revitalize a regional economy by increasing regional exports.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2009.10a
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• pp.541-543
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• 2009

• Journal of the Korean association of regional geographers
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• v.16 no.1
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• pp.48-58
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• 2010

Currently, understanding the characters of Rural Industrial Parks' regional distribution is insufficient. Therefore, regional characters of the Rural Industrial Parks all over the country were studied through indications such as sales, worker-sales increase rate, worker increase rates. Portfolio analysis and IDW by using ArcView 3.2 were used as a method of analysis. As a result, most of the Rural Industrial Parks' size and size increase rate showed low figures. Respective regional analysis shows that there is an increase in the scale of the Kyungnam area using portfolio analysis, whereas the scale of Chonbuk is high using IDW. As a result, it shows that there is difference on the scale between Rural Industrial Parks when individual or Associated with peripheral. Therefore, not only do the Rural Industrial Parks need stimulation individually, but adjacent parks need to be supported and managed.

• Journal of Environmental Impact Assessment
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• v.29 no.2
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• pp.144-155
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• 2020

This research developed an approach to identify ecologically important areas at local scales and explained how the results of this approach could contribute to extend the protected areas in the Republic of Korea (ROK). While most developed countries have considered various biotic and abiotic factors, ecological processes, migration routes, habitat connectivity, ecosystem services, and etc. to determine the protected areas, ROK has considered a few factors focusing on biodiversity, landscape, and the habitats of endangered organisms. However, for sustainable management of our nature, we need comprehensive understanding of various ecosystem factors and interactions among them at local scales in designating protected areas. Forthis, we developed a conceptual model based on the ecological engineering approach and then explained how the results of this approach could contribute to extend the protected areas. In particular, we considered future land-use and climate change in determining the priority areas for novel protected areas. Our research suggested an effective methodology 1) to include various ecosystem factors and 2) to consider future environmental changes as well as current environmental conditions in finding the ecologically important areas and prioritizing these areas. However, our approach has limitations on the real-world applications due to the lack of fundamental information and data on our ecosystems. To improve the effectiveness of our approach in the real-world applications, we need various long-term ecological research results, environmental and ecological monitoring data, and both current and future spatial environmental data.

• The Korean Journal of Applied Statistics
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• v.12 no.2
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• pp.375-385
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• 1999

본 연구에서는 노동력수요동향조사를 위한 새로운 표본설계를 제시하였다. 새로운 표본설계에서는 전국 통계를 산출하기 위한 전국표본과 지역 특성에 맞는 고용정책 및 직업 훈련 계획 수립 등을 위한 지역통계의 수요에 따라 16개 시·도별, 규모별, 산업대분류별로 오차를 관리할 수 있는 지역표본으로 이원화하여 설계하였으며, 규모별, 산업대분류별로 오차를 관리하는 현행 표본조사의 상대표준오차를 검토하여 규모별, 산업중분류별로 합리적인 오차 관리가 가능하도록 설계하였다.