• Journal of the Korean Data and Information Science Society
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• 제27권5호
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• pp.1147-1154
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• 2016

고속철도 (KTX) 개통으로 인해 전국이 반나절 생활권으로 편입되면서 지역의 사회, 경제, 문화 등 여러 분야에 다양한 영향을 미친 것으로 알려져 있다. 최근 KTX 개통 후 정차도시와 그 주변지역에 대한 여러 가지 변화가 관측되어 지면서 그 영향에 대한 여러 가지 연구가 이루어져 왔는데, 지역의 생산 및 고용 확대, 운송 수단간 수요 대체효과, 기업의 지방이전 및 수도권 기능의 분산을 통한 국토의 균형 개발, 그리고 고속철도 이용에 따른 시간비용 절감을 통한 여러가지 사회 경제적 비용 축소 등에 영향을 준 것으로 알려져 있다. 또한 최근에는 KTX역 중심의 관광 네트워크를 통한 지역 관광 여가 산업의 발전과 지역 문화 예술 인적 교류 활성화를 통한 삶의 질 향상에 관한 연구도 활발하다. 본 연구에서는 지역별 가계최종소비지출에 대한 공간패널모형을 이용하여 KTX 개통을 통한 고속철도망 연결이 지역경제의 소비활동에 어떠한 영향을 미쳤는지를 알아보고자 한다. 이를 위해 독립변수로는 지역별 임금소득, 주택매매가격지수, 그리고 실질금리 등을 사용되었고, KTX에 의해서 연결되어 있는지 유무에 따라 공간 자기상관 행렬을 고려하였다.

• 무역학회지
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• 제47권2호
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• pp.175-193
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• 2022

This study analyzes the effects of road transportation networks on the local economy in korea. The analysis methods are SNA and spatial panel regression model. The subjects of this study are inland areas of Korea, and the research period is from 2010 to 2019. The network analysis showed that the connection centrality of Gyeongg-do was high internally and externally. Gyeonggi-do has played a central role in the domestic road freight transportation industry. The results of spatial panel regression analysis showed that there was economic competition between regions. Domestic road transportation industry has been competitive among regions and has economic ripple effect. And Internal cargo has been shown to boost the economy of the region. But internal cargo has been shown to lower the economy of surrounding regions, but external cargo has been shown to increase the economy. In order to revitalize the local economy, it is necessary to increase road cargo.

• 한국공간구조학회논문집
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• 제20권2호
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• pp.87-94
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• 2020

The present study is aimed to calculate the optimal damping according to the seismic load on the structure with a non-seismic design to perform structure analysis considering the deformation of structural joint connection and panel zone; to develop design program equipped with structural stability of the steel frame structures reinforced with the panel zone and viscous dampers, using the results of the analysis, in order to systematically integrate the seismic reinforcement of the non-seismic structures and the analysis and design of steel frame structures. The study results are as follows: When considering the deformation of the panel zone, the deformation has been reduced up to thickness of the panel double plate below twice the flange thickness, which indicates the effect of the double plate thickness on the panel zone, but the deformation showed uniform convergence when the ration is more than twice. The SMRPF system that was applied to this study determines the damping force and displacement by considering the panel zone to the joint connection and calculating the shear each floor for the seismic load at the same time. The result indicates that the competence of the damper is predictable that can secure seismic performance for the structures with non-seismic design without changing the cross-section of the members.

• Journal of Korea Trade
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• 제25권3호
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• pp.116-133
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• 2021

Purpose - Intra-industry trade of agricultural products can eliminate the disadvantage of Korea's traditional agriculture and improve its lack of comparative advantage. The main purpose of this paper is to measure the level and index of intra-industry trade of Korean agricultural products and to explore the spatial dependence and spillover effect associated with this type of trade. The main factors influencing intra-agricultural trade are analyzed from two perspectives: the population and the classification of agricultural products. Design/methodology - First, the level of intra-industry trade of Korean agricultural products is measured. Second, to obtain a more accurate estimate of the influence of various factors, and based on two types of weight matrices, a spatial econometric model is constructed from two aspects: population and classification of agricultural products. The status and the factors influencing intra-industry trade are also studied. Findings - It is concluded that there is a positive spatial correlation between Korea's intra-industry trade in agricultural products and that of its trading partners. The spatial spillover effect of this type of trade is verified by using the spatial autoregressive model (SAR). Labor-intensive agricultural products are found to have a positive spillover effect on intra-industry trade, while land-intensive products do not have a significant effect. Originality/value - In this paper, the two types of agricultural products are meticulously distinguished, and the spatial effect of the intra-industry trade of agricultural products as well as the influence of various factors are analyzed. In addition, the accuracy of the estimation of the coefficients of the factors by using the spatial econometric model is higher than that of the ordinary panel data model.

• 자원ㆍ환경경제연구
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• 제28권3호
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• pp.327-354
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• 2019

본 논문에서는 한국의 미세먼지 발생원인을 분석하는 과정에서 기존 논문에서는 고려하지 않았던 지역 간 공간상관성(Spatial correlation)을 고려한 패널계량분석을 진행하였다. 기존 환경쿠즈네츠곡선(EKC, Environmental Kuznets Curve)에 대한 연구들에서, 인접한 국가 및 지역 간에 오염물질의 상호영향이 존재할 가능성이 있음에도 각 유닛이 독립이라고 가정한다. 본 논문에서는 한국의 미세먼지농도에 대한 지역 패널데이터를 이용하여 기존 EKC가 지역의 상호상관성을 고려하는 때도 성립할 수 있으며, 이러한 영향을 고려하지 않았을 때 미세먼지농도의 원인에 대해 과소 혹은 과대 추정될 수 있음을 규명하였다.

• 한국정보시스템학회지:정보시스템연구
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• 제26권3호
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• pp.229-246
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• 2017

Purpose The purpose of this study is to examine the potential asymmetry in price competition between the geographically defined submarkets of the lodging industry, namely the traditional and alternative accommodation facilities. Design/methodology/approach The study utilizes a spatial econometric model to empirically test for the hypothesized asymmetry in price competition. Property-level panel data on hotels and alternative accommodation facilities collected from a major online travel agency (OTA: Agoda.com) was used for this purpose. Findings Result of the analysis shows significant intra-segment spatial price competition among the properties, that is, within hotels and within alternative accommodation submarkets, respectively. However, the inter-segment competition was found to be asymmetric as hypothesized. Room rates of hotels are influenced by prices of geographically close alternative accommodations, but the reverse does not hold. Implications for practitioners and suggestions for future research are discussed along with the findings of the study.

• International Journal of Naval Architecture and Ocean Engineering
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• 제6권4호
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• pp.1064-1081
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• 2014

This paper presents a numerical analysis of slamming and whipping using a fully coupled hydroelastic model. The coupled model uses a 3-D Rankine panel method, a 1-D or 3-D finite element method, and a 2-D Generalized Wagner Model (GWM), which are strongly coupled in time domain. First, the GWM is validated against results of a free drop test of wedges. Second, the fully coupled method is validated against model test results for a 10,000 twenty-foot equivalent unit (TEU) containership. Slamming pressures and whipping responses to regular waves are compared. A spatial distribution of local slamming forces is measured using 14 force sensors in the model test, and it is compared with the integration of the pressure distribution by the computation. Furthermore, the pressure is decomposed into the added mass, impact, and hydrostatic components, in the computational results. The validity and characteristics of the numerical model are discussed.

• Asian Journal of Innovation and Policy
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• 제10권2호
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• pp.212-235
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• 2021

In spite of the increasing popularity of the Ricardian model for the study of the impact of climate change on agriculture, there has been few attempts to examine the role of interregional spillovers in this framework and all of them rely on geographical proximity-based weighting schemes. We remedy to this gap by focusing on the spatial externalities of surface water flow used for irrigation purposes and demonstrate that farmland value, the usual dependent variable used in the Ricardian framework, is a function of the climate variables experienced locally and in the upstream locations. This novel approach is tested empirically on a spatial panel model estimated across the counties of the Southwest USA over 1997-2012. This region is one of the driest in the country, hence its agriculture relies heavily on irrigated surface water. The results highlight how the weather conditions in upstream counties significantly affect downstream agriculture, thus the actual impact of climate change on agriculture and subsequent adaptation policies cannot overlook the streamflow network anymore.

• Journal of the Korean Data and Information Science Society
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• 제28권3호
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• pp.473-481
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• 2017

초미세먼지 (particulate matter 2.5, $PM_{2.5}$)는 분진의 입경이 2.5 이하의 보다 작은 크기의 미세한 입자들을 말하는데, 미세먼지와 달리 대기 중에서 제거가 어렵고 기도나 코 점막에서 걸러지지 않으며, 호흡 시 폐포까지 직접 침투하기 때문에 장기간 노출될 경우, 폐 기능 감소, COPD (chronic obstructive pulmonary disease) 증가, 폐암 발생증가가 있다고 알려져 있다. 현재 국내외에서 초미세먼지에 대해 다양한 연구가 이루어지고 있는데, 초미세먼지의 농도는 기상인자 (풍속, 강우량, 일사량 등)에 영향을 받는 것으로 알려져 있으며, 이산화질소, 오존, 이산화황, 미세먼지 등 대기물질의 농도에도 영향을 받는 것으로 알려져 있다. 특히 우리나라는 점차 증가하고 있는 자동차 수나 오염원으로 인한 초미세먼지외에도 중국으로부터 유입되는 초미세먼지 또한 고려되어야 하는 대상이므로 기상인자 중 풍향과 풍속 또한 어느 정도 큰 영향을 미칠 것으로 판단되며 인접 지역에 대한 영양 또한 고려되어야 할 것이다. 본 연구에서는 초미세먼지 농도에 영향을 미치는 유의한 대기물질 및 기상자료와 초미세먼지 농도의 지역적 특성을 고려한 공간자기상관 행렬에 기초한 공간패널모형을 소개하였고 이를 서울 25개 구에서 관측된 초미세먼지 자료에 적용하였다. 또한 초미세먼지와 대기오염물질의 농도를 통해 서울시에서 발생한 호흡기 질환 환자 수를 분석하여 그의 위해성을 확인하였다.

• 무역학회지
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• 제47권3호
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• pp.157-175
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• 2022

This study calculates agglomeration indices of manufacturing specialization and diversification in different regions of South Korea. Two types of agglomeration indices are introduced into the spatial durbin model (SDM) to analyzes the effects of manufacturing agglomeration in Korea on CO₂ emission intensity. The subjects of this study are 17 regions of South Korea , and the research period is from 2013 to 2019. This study also uses partial differential to analyze the direct and spillover effect of specialization and diversification agglomeration on CO₂ emission intensity. From the perspective of direct effect, the results reveal that specialization agglomeration is an important factor contributing to Korea's CO₂ emissions. However, diversification agglomeration has an obvious CO₂ emission reduction effect. From the perspective of spillover effect, this study finds that specialization agglomeration in one region can also contribute to CO₂ emissions in nearby regions. However, the development of diversification agglomeration in one region can have CO₂ emission reduction spillover effect on neighboring regions.