• 대한의용생체공학회:의공학회지
• /
• 제16권2호
• /
• pp.223-230
• /
• 1995

Rb-82 dynamic PET과 이중적분법에 의한 국소 심근 혈류측정 연구를 시행하고자 실험 개를 이용한 심근 경색 모델과 허혈성 심근질환에서 좌심실 입력함수에 의한 정상 및 관류결손 심근에서의 혈류를 측정하였다. 이중적분법이 선형회귀모델에 의한 혈류측정방법에 비하여 안정도가 높고 심근내혈류가 선형적인 가정을 배제할 수 있어 사용 가능한 방법이 될 수 있음을 확인하였다.

• 한국산림과학회지
• /
• 제83권4호
• /
• pp.521-530
• /
• 1994

재적식(材積式)은 보통 흉고직경과 수고의 함수로 표현되는데, 회귀분석(回歸分析)을 통해 정확도가 높은 식이 주로 채택되고 있다. 우리나라에서도 지금까지 흉고직경(D)과 수고(H)를 독립변수로 하는 지수식(指數式)($V=aD^bH^c$)으로 각 수종에 대한 일반(一般)재적식을 유도하고 있다. 본 연구에서는 강원도 지방내의 홍천, 정선, 명주, 원주, 영월지역에 대한 간곡선식(幹曲線式)을 지역별로 유도하고, 이 간곡선식의 회전체(回轉體) 적분(積分)을 통해 지역별 재적을 직접 추정할 수 있는 간곡선 및 재적식 모델을 마련하였다. 조제된 모델에 의해 지역별로 추정된 재적은 기존의 강원도 지방 소나무재적표에 의해 추정된 재적에 비해 정확도가 높았다. 또한 지역간곡선식에 의해 유도된 간곡선의 형태는 지역에 따라 서로 달랐으며, 특히 영월지역과 원주지역의 수간은 다른 지역에 비해 수간상부에서 가늘게 발달하는 것으로 나타났다. 이와같은 간곡선의 다양한 형태는 재적추정에 있어서도 지역간 차이를 유발하였다.

• 기술혁신학회지
• /
• 제20권2호
• /
• pp.406-429
• /
• 2017

대부분의 정부 출연(연)이 지역조직을 운영하고 있으나, 지역 內 자체 혁신체계상의 한계, 개별 기관별 지역조직 운영에 따른 경영상의 어려움 및 다양한 산업계의 R&D 수요 충족 미흡 등 대내외적인 환경 변화 적응에 어려움을 겪고 있다. 이에 본 연구에서는 정부 출연(연) 지역조직의 지역 내(內) 주요기능 및 향후 운영 효율화 방안을 수요자(고객 품질향상) 관점에서 제시하고자 Kano 모형과 Timko의 고객만족계수를 바탕으로 출연(연) 지역조직 운영에 대한 연구개발서비스 품질속성을 살펴보았다. 분석결과 기업의 소재지에 따라 서로 상이한 품질 속성이 나타남을 확인 할 수 있었으며, 이러한 결과는 향후 정부 출연(연) 지역조직 설립, 운영 및 평가 및 중소기업의 역량(자체 R&D 조직 보유 여부 등)을 고려한 정책 설계 시 기본 자료로 활용될 수 있을 것이다.

• Journal of Korea Trade
• /
• 제27권3호
• /
• pp.103-118
• /
• 2023

Purpose - This study aims to examine the dynamic relationship between the variables impacted by the Regional Comprehensive Economic Partnership (RCEP) and the level of intra-industry trade among member states, with the ultimate objective of deducing the short- and long-term effects of RCEP on trade. Design/methodology - This study focuses on tariffs, GDP growth rates, and the proportion of regional FDI to total FDI as research variables, and employs a panel vector autoregression model and GMM-style estimator to investigate the dynamic relationship between RCEP and intra-industry trade among member countries. Findings - The study finds that the level of intra-industry trade between member states is positively impacted by both tariffs and intra-regional FDI. The impulse response graph shows that tariffs and FDI within the region can promote intra-industry trade among member countries, with a quick response. However, the contribution rates of tariffs and intra-regional FDI are not particularly high at approximately 1.5% and 1.4%, respectively. In contrast, the contribution rate of GDP growth can reach around 8.5%. This implies that the influence of economic growth rate on intra-regional trade in industries is not only long-term but also more powerful than that of tariffs and intra-regional FDI. Originality/value - The originality of this study lies in providing a new approach to investigating the potential impact of RCEP while avoiding the limitations associated with the GTAP model. Additionally, this study addresses existing gaps within the research, further contributing to the research merit of the study.

• 한국물환경학회지
• /
• 제32권6호
• /
• pp.552-561
• /
• 2016

For the prediction of hydrologic phenomenon, predicting future land use change is a very important task. This study aimed to compare and analyze the two land use change models, CLUE-S and SLEUTH3-R. The analysis of two models were performed based on the MSR value such that the model with more reliable MSR value can be recommended as an appropriate land use change prediction model. The model performance was examined by applying to the Gapcheon A watershed. Land use map of the study area of 2007 obtained from the Ministry of Environment was compared with the predicted land use map obtained from each of the two models. The result from both models showed somewhat similar results. The MSR value obtained from CLUE-S was 0.564, while that from SLEUTH3-R was 0.586. However, when land use map of 2010 was compared with predicted land use map obtained from the two models in same manner, the MSR value obtained from CLUE-S' was 0.500 while that from SLEUTH3-R was decreased to 0.397, an approximately 32.3% decrease from previous value of 2007. Moreover, SLEUTH3-R showed more sensitivity in conversion of urban areas, as compared to other land use types. Therefore, for the prediction of future land use change, CLUE-S model is more reliable than SLEUTH3-R.

• Journal of Korea Trade
• /
• 제24권1호
• /
• pp.171-207
• /
• 2020

Purpose - This paper investigates the potential effect of the Regional Comprehensive Economic Partnership (RCEP) on trade liberalization among member countries in order to answer key questions in our research on whether the RCEP will be a cornerstone or just collaboration. Furthermore, it aims to measure the likely magnitude of the economic impact it has on its members. Design/methodology - Toward achieving research objectives, we developed a regional CGE model based on the GTAP 9 database. Findings - The simulation results show Korea, Australia, India, and Japan ranked the top countries with an average growth in GDP of 0.38 %, 0.36%, 0.29%, and 0.23%, respectively. Moreover, China and New Zealand followed with a percentage of 0.12% each. The lower economic performing group is the ASEAN group due to a contraction in GDP by 0.13%. Accordingly, there was a positive impact of the RCEP agreement on all member states, as empirically demonstrated. Furthermore, Korea is one of the countries that will benefit most from joining this agreement. Finally, this agreement is important; it has many economic benefits to member states, but it is not a cornerstone. Originality/value - The examination of the quantitative effects of tariff removal among the RCEP's countries is its value. We will address all member countries of the convention simultaneously using a regional CGE model GAMS language, where we employed a Mathematical Programming System for General Equilibrium (MPSGE) to establish a Regional CGE model. This study is directed to policymakers looking at evaluating RCEP agreement.

• Journal of Chest Surgery
• /
• 제49권sup1호
• /
• pp.28-36
• /
• 2016

Background: This study aimed to develop the models for regional cardiac surgery centers, which take regional characteristics into consideration, as a policy measure that could alleviate the concentration of cardiac surgery in the metropolitan area and enhance the accessibility for patients who reside in the regions. Methods: To develop the models and set standards for the necessary personnel and facilities for the initial management plan, we held workshops, debates, and conference meetings with various experts. Results: After partitioning the plan into two parts (the operational autonomy and the functional comprehensiveness), three models were developed: the 'independent regional cardiac surgery center' model, the 'satellite cardiac surgery center within hospitals' model, and the 'extended cardiac surgery department within hospitals' model. Proposals on personnel and facility management for each of the models were also presented. A regional cardiac surgery center model that could be applied to each treatment area was proposed, which was developed based on the anticipated demand for cardiac surgery. The independent model or the satellite model was proposed for Chungcheong, Jeolla, North Gyeongsang, and South Gyeongsang area, where more than 500 cardiac surgeries are performed annually. The extended model was proposed as most effective for the Gangwon and Jeju area, where more than 200 cardiac surgeries are performed annually. Conclusion: The operation of regional cardiac surgery centers with high caliber professionals and quality resources such as optimal equipment and facility size, should enhance regional healthcare accessibility and the quality of cardiac surgery in South Korea.

• 기술혁신연구
• /
• 제30권4호
• /
• pp.1-28
• /
• 2022

지역의 혁신역량은 지속 가능한 지역경제의 주요한 성장의 원천으로 받아들여지고 있으며 이에 관한 많은 연구가 보고되었다. 최근에는 지역혁신체제의 정책적 수행과정에서 지역의 특성을 반영해야 한다는 스마트 특성화 전략이 제안되었으나, 실증 연구는 제한적인 결과를 제시하는 데 그치고 있다. 이에 본 연구는 스마트 특성화를 기존의 지역혁신 연구의 보완 전략으로 접근하여 한계점을 극복하고자 하였다. 이를 위해 스마트 특성화를 지역혁신체제의 대체 전략이 아닌 지역혁신역량의 제도 요소로 보고, 지역혁신역량과 지역경제 간 관계를 분석하여 스마트 특성화가 지역경제에 미치는 영향을 파악하였다. 국내 16개 시·도에 대해 2009-2018년의 10개년으로 구성한 패널 모형을 통해 연구를 수행하였으며, 적합한 패널 모형을 탐색하는 과정을 통해 최종적으로 FGLS모형을 활용하였다. 연구 결과 산업의 연관 다양성과 비연관 다양성으로 구성된 스마트 특성화는 지역경제에 긍정적인 영향을 미치는 것으로 나타났다. 또한 기반 요소, 촉진 요소로 나누어 측정한 다른 지역혁신역량 역시 지역경제에 긍정적인 영향을 미쳐 기존 지역혁신과 지역경제 간 긍정적인 연구 결과를 확인하였다. 본 연구는 국내 연구가 부족한 스마트 특성화를 지역혁신역량의 제도적 요소로 보고 지역별 산업 연관 다양성과 비연관 다양성을 통해 이를 측정하였다는 데 의의가 있다.

• International Journal of Railway
• /
• 제1권1호
• /
• pp.12-19
• /
• 2008

Starting her business operation on January 5 2007, Taiwan High Speed Rail(THSR) shapes a new time-space frame for Taiwan western corridor, where more than 90% of national population lives around and more than 95% gross domestic product created from. Comparing with the four-hour traveling time by highway before 2007, THSR reduces the time required to one and half hours from Taipei to Kaohsiung. It will not only benefit the communication along the island from north to south, but also change the location advantages/disadvantages for all cities in these regions. Therefore, this paper establishes a spatial computable general equilibrium model(SCGE Model) to simulate the economic effect of High Speed Rail(HSR). This SCGE model divides Taiwan economy into fifteen geographic regions and thirteen industries. Each region has three sectors: household sector, transportation sector, and industries sector. Following the behavior function of economic theories, the general equilibrium can be achieved simultaneously. Thus, gross regional product (GRP), capital formation, employment income and welfare/utility level can be all observed by calculating the different economic result between cases with-/ without-HSR. Besides, this model presents the social welfare benefit from HSR operation, the polarization phenomenon among regions and within certain region, unbalance distribution of welfare along the HSR line, and industries development divergence among regions etc. These major findings should be useful for regional development policy making.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 추계학술대회 논문집
• /
• pp.1896-1912
• /
• 2007

Starting her business operation on January 5 2007, Taiwan High Speed Rail (THSR) shapes a new time-space frame for Taiwan western corridor, where more than 90% of national population lives around and more than 95% gross domestic product created from. Comparing with the four-hour traveling time by highway before 2007, THSR reduces the time required to one and half hours from Taipei to Kaohsiung. It will not only benefit the communication along the island from north to south, but also change the location advantages/disadvantages for all cities in these regions. Therefore, this paper establishes a spatial computable general equilibrium model (SCGE Model) to simulate the economic effect of High Speed Rail (HSR). This SCGE model divides Taiwan economy into fifteen geographic regions and thirteen industries. Each region has three sectors: household sector, transportation sector, and industries sector. Following the behavior function of economic theories, the general equilibrium can be achieved simultaneously. Thus, gross regional product (GRP), capital formation, employment income and welfare/utility level can be all observed by calculating the different economic result between cases with-/ without-HSR. Besides, this model presents the social welfare benefit from HSR operation, the polarization phenomenon among regions and within certain region, unbalance distribution of welfare along the HSR line, and industries development divergence among regions etc. These major findings should be useful for regional development policy making.