• 농촌계획
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• 제14권4호
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• pp.109-119
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• 2008

The objectives of this study are to develop a green tourism potential evaluation method with rural amenity and demand of citizen. The new index which was named GPD(green tourism potential degree) is designed to propose the green tourism potential of rural areas using spatial analysis of geographic information system and spatial interaction of gravity model. And in order to evaluate the green tourism potential with supply side and demand side, two indices were defined; One is green tourism demand degree(GDD) which is developed to quantify a demand side potential by the analysis of urban population and urbanization index, and the other is green tourism attraction degree(GAD) which is developed to quantify a supply side potential by the analysis of rural amenity values using AHP algorithm, based on opinion of related experts. The developed method was applied to a part of Kyounggi province, Seoul and Incheon. All the study area's GAD, GDD and GPD were assessed and the proposed green tourism potential evaluation method could be used in developing rural development plans and green tourism policies considering spatial interaction with citizen and green tourism resources.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2005년도 공동학술대회 논문집
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• pp.261-266
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• 2005

인공위성 측지학의 발달로 최근 들어 정밀도와 해상도가 높아진 중력포텐셜 모델들이 공개되었다. 근래에 가장 많이 사용되는 EGM96과 CHAMP, GRACE 등의 저고도 위성자료를 기반으로 하는 가장 최근의 EIGEN-CG01C 모델을 이용하여 한반도와 인근지역을 포함하는 $123^{\circ}{\sim}132^{\circ}$ E, $33^{\circ}{\sim}43^{\circ}$ N의 연구지역에서 지오이드와 중력이상을 계산하고, 비교 검토하였다. 두 모델은 지오이드와 중력이상에서 0.90이상의 매우 높은 상관관계를 가지고 있으나, Amplitude 분석에서 EIGEN-CG01C 모델이 고주파영역이 우세한 것으로 나타났다. 두 모델을 통해 계산된 중력이상에서 북한지역 및 황해 연안 일부에서 다소 차이를 보인다. Power spectrum 분석을 통하여 대규모 지구조나 지하자원 탐사에 유용하게 활용될 수 있는 잔여이상을 계산하였다.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2007년도 춘계학술발표회 논문집
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• pp.183-186
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• 2007

Hyperspectral remote sensing data contain plenty of information about objects, which makes object classification more precise. Over the past several years, different algorithms for the classification of hyperspectral remote sensing images have been developed. In this study, we proposed method based on absorption band extraction and Gravity type model to solve hyperspectral image classification problem. In contrast to conventional methods that are based on correlation techniques, this method is simple and more effective. The proposed approach was tested to evaluate its effectiveness. The evaluation was done by comparing the results of preexiting SFF(Spectral Feature Fitting) classification method. The evaluation results showed the proposed approach has a good potential in the classification of hyperspectral images.

• Journal of Korea Trade
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• 제27권2호
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• pp.61-76
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• 2023

Purpose - The digital service trade has become an important driver of the global service trade. The main purpose of this study is to explore the influencing factors of digital service exports from China and Korea to RCEP sample countries respectively, and to comprehensively study the export potential of China and Korea to RCEP countries, so as to provide theoretical guidance and a decision-making reference to promote digital service trade exports and digital economy development in China and Korea. Design/methodology - First, the stochastic frontier gravity model was improved by introducing nonefficiency factors affecting digital services trade, extending the gravity model of traditional services trade exports to digital services trade exports. Secondly, the panel data of China and Korea for the eight sample countries of RCEP from 2011 to 2021 were adopted for the empirical analysis of digital service export potential by a stochastic frontier model. Findings - China's economic growth plays a role in increasing China's digital service trade exports, while Korea's economic growth does not play a significant role in increasing Korea's digital service trade exports. However, the economic growth of trading partner countries can play a significant role in boosting the digital service trade in both China and Korea, and comparison shows that Korea has higher resilience in the digital services trade than China. In addition, the market size of target countries plays a positive role in promoting the digital service trade exports of both China and Korea, and the increase in the value-added share of services in target countries will lead to a decrease in the digital service trade exports of both China and Korea. Originality/value - This study is innovative in terms of research perspective and method. Academic research on the export potential of international trade has been extensive, but most studies are based on the perspective of the goods trade, fewer studies are based on the perspective of the service trade, and there are almost no studies based on the perspective of digital service trade. There is a gap based on the comparative analysis of the export potential of the digital service trade between China and Korea. This study extends the gravitational model of traditional service trade exports to digital service trade exports to comparatively analyze the export potential of China and Korea to RCEP countries. This study addresses this limitation by analyzing a comparative analysis of the digital service trade export potential of China and Korea.

• 한국콘텐츠학회논문지
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• 제22권7호
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• pp.216-226
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• 2022

한중 FTA 협정 체결에 따라 새로운 상황에서 한중 양국의 전자제품 무역의 잠재력을 연구하는 것은 양국 전자제품 무역 발전을 추진하는 데 중대한 현실적 의의가 있다. 이를 토대로 본 연구에서는 2005년~2019년 한·중 전자제품 무역 관련 데이터를 선정해 확장된 무역 중력 모형을 통해 양국의 전자제품 무역 잠재력 요인을 분석한 뒤 양국의 전자제품 무역 잠재력 수치를 추산하고 비교하였다. 연구 결과 (1) 경제 규모, 인구 규모, APEC 회원국 여부가 한중 양국의 무역액 증가 역할을 하고 있음을 발견했다. 지리적 거리는 양국의 무역액을 억제하는 역할을 한다. 무역 자유도는 중국 전자제품의 무역액을 촉진하는데 눈에 띄는 역할을 하고 있고, 한국의 전자제품 무역에는 큰 영향이 없다. (2) 2015년 이후 중국의 대(對)한국 전자제품 수출은 잠재력이 크다. 한국의 대(對)중 전자제품 무역에 대한 잠재력도 어느 정도 있기 때문에 적극적인 정책을 통해 발굴이 필요하다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.589-592
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• 2005

Gravity characteristics and Moho undulations are investigated in the Korean peninsula by using satellite gravity data. According to the development of satellite geodesy, gravity potential models which have high accuracy and resolution were released. Using the EIGEN-CGOIC model based on low orbit satellite data such as CHAMP and GRACE, geoid and gravity anomaly were calculated by spherical harmonic analysis. The study area is located at $123^{\circ}\sim132^{\circ}E, 33^{\circ}\sim43^{\circ}$N including Korea. Free-air anomalies, which show the effect of terrain, have the values between $-37\sim724 mgal. After Bouguer correction, the range of simple Bouguer anomalies is $-221\sim246$ mgal. Complete Bouguer anomalies after terrain correction increase from continent to marine. This phenomenon is related rise of Moho discontinuity. The cut-frequency for extraction of Moho undulation was determined by power spectrum analysis, and then 3D inversion modeling was implemented. The mean, maximum, minimum, and standard deviation of Moho depth undulation are -26, -36, -8, and 4.9 krn, respectively.

• 융복합기술연구소 논문집
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• 제4권2호
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• pp.55-59
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• 2014

A cat is able to quickly recover balance from unstable posture. To observe the balance recovery procedure of the cat, an impulse is applied to the cat while walking on a narrow bridge. We find that it rotates its tail toward the falling direction. In our previous research, the balance recovery procedure is analyzed based on the law of the angular momentum conservation and then a key equation is derived to maintain the balance. However, it did not consider the gravity, so the performance is not good. In this paper, a new dynamic model is proposed using the Lagrangian mechanics. In the method, the gravity is included in the potential energy. Through the proposed dynamic model, controlling the balance of a walking robot is possible.

• 농촌계획
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• 제19권4호
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• pp.293-306
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• 2013

According to the increase of rural experience, that is important in satisfying needs of green tourism and vitalizing rural economy to use closed school in rural area as experience facility. For using closed school as experience facility, political and institutional assistants are needed in effective equipments and stable operation based on multi-perspective approach and analysis. In this study, we try to evaluate green-tourism accessibility of rural experience facility remodeled from closed school considering regional population and spatial characteristics. In evaluating process, gravity potential model are adapted with considering group size of customer and distance-friction coefficient. Distance-friction coefficient is a function of user restriction which depend on possible activity in each experience facility. Green tourism accessibility of experience facility is calculated with summation of accessibility to each region, and we analyzed it as a group by closed school type and location with application in Chungcheongnam-do. We found a correlation between green tourism accessibility of rural closed school and their income.

• 농촌계획
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• 제27권3호
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• pp.93-102
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• 2021

This study was attempted to provide a scientific basis for the problem of location selection by spatial scale for efficient promotion of projects related to green care farm complex. Location potential assessment system in local government scale consists of two major components from demand-side and supply-side consideration. The demand-side aspect considered the characteristics of potential users, while supply-side aspect used total 18 indices over 8 divisions under 3 fields. For the location potential assessment in district scale, total 8 indices under 3 major divisions were considered based on biological, physical, social, and economic environment. The application results of the location potential evaluation system in local government scale(excluding metropolitan cities) showed high location potential in southern Gyeonggi Province and near Busan Metropolitan City. As a result of applying the district-scale location potential evaluation system to Geumsan-gun, Geumsan-eup, Chubu-myeon, and Jewon-myeon have high potential. Further studies to improve the applicability of the developed indices are recommended by enhancing assessment indices, complementing base data, and reinforcing with spatial analysis.

• 대한지리학회지
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• 제43권2호
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• pp.202-219
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• 2008

지난 10여년간, 미국의 초고속 인터넷 서비스에 대한 수요가 폭발적으로 증가함에 따라, 정보통신 인프라의 신축 및 업그레이드 또한 빠르게 진행되었다. 비록 현재 도시화된 지역들의 많은 사람들이 고급 인터넷 서비스를 이용할 수 있지만, 원거리 또는 소규모 인구 지역과 같은 곳은 상업적 인터넷 서비스 공급자들에게 잠재적으로 이윤을 창출해 주지 못하기 때문에, 여전히 서비스에 대한 접근이 제한되고 있다. 이 연구는 미국 카운티에 따른 초고속 인터넷 서비스에 대한 접근의 공간적 불균형, 보다 광범위한 개념으로, '정보 격차' 에 대해서 다루고 있으며, 이러한 공간적 현상을 규명하기 위해 카운티에 따른 인터넷 접근성의 계량적 측정 모델을 제안하고 있다. 개발된 측정 모델은 전통적인 중력 모형 기반의 잠재력 모델과 네트웍 위상적 측정을 혼합함으로써 인터넷 서비스의 전반적 프로세스에 대한 이해를 명시적으로 포괄하고 있다. 접근성 측정을 위한 일련의 계산들은 GIS플랫폼에서 여러가지의 프로그램된 기능들을 통해 이루어졌다.