• Environmental and Resource Economics Review
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• v.33 no.3
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• pp.203-239
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• 2024

The introduction of a regional differential electricity rate system is being discussed, and the LMP (Locational Marginal Price) method is mentioned as a promising alternative. Under this background, this study analyzed a mathematical model and suggests that the LMP method produces results that maximize social welfare. The analysis was conducted separately for long-term decision-making where transmission capacity can be expanded, and for short-term decision-making in which transmission capacity is given. The analysis for short-term decision-making was conducted for peak load situations where capacity is insufficient and for non-load situations with spare capacity. The results of the analysis suggested that the price to maximize social welfare is equal to the marginal power generation cost by region, and the difference in marginal cost by region reflects the value lost due to transmission loss and compensation for transmission network investment. In addition, if the transmission capacity is less than the optimal capacity, the compensation for transmission network investment exceeds the incremental cost, providing an incentive to invest in the transmission network. If the transmission capacity exceeds the optimal capacity, the compensation for transmission network investment becomes lower than incremental cost or zero and the investment is not recovered, suppressing the investment in transmission networks. The results are the same as the LMP method suggests, and this means that this method maximizes social welfare and provides an optimal transmission network investment signal. The above analysis results contribute to understanding the characteristics of LMP. In addition, this study discussed what changes are needed in the electricity market when introducing the LMP concept.

• Management & Information Systems Review
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• v.31 no.3
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• pp.223-248
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• 2012

This study analyses support policy and structural change of textile industry in Daegu Kyungbuk region, and suggests major issues for textile industry's innovation. In Daegu Kyungbuk, it was 1999 that a policy, so called Milano Project, in order to promote a textile industry was devised. In 2004, the Regional Industrial Promotion Plan was devised. The plan was born from a view point of establishing a regional innovation system and of promoting the innovative clusters under a knowledge based economy. After then, the Regional Industry Promotion Project or Regional Strategic Industry Promotion Project became a core of regional textile industrial policy. Research results indicated that the first stage Milano project (1999-2003) showed both positive and negative effects. There were no long-term development plan, clear vision and strategy. But, core industrial infrastructure for differentiated product development, such as New product Development Support Center and Dyeing Design Practical Application Center, was constructed. The second stage Daegu Textile Industry Promotion Plan (2004-2008) displayed a significant technological performance and new product sales with the assistance of Kyungbuk province. Also, textile industry revealed positive fruits such as financial structure, productivity, and profitability as a result of strong restructuring. In industrial structure, there was a important change from clothe textile material to industry textile material. Most of textile companies did not showed high capability in CEO's technology innovation intention, entrepreneurship, R&D and human resource competency in compare with other industry. We suggested that Daegu Kyungbuk has to select and concentrate on the high-tech textile material and living textile for sustainable development and competitiveness. We also proposed a confidence and cooperation based innovation network and company oriented innovation cluster.

• Journal of the Korean Geographical Society
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• v.28 no.4
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• pp.321-355
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• 1993

This paper focuses on the geographical pattern of financial activities in the Korean urban system during 1975-1990, based on the assumption that financial activities can reveal control points in Korea's urban economy. In terms of spatial evolution of financial insitutions, different locational characteristics are revealed among different types of financial institutions, implying the role of urban hierarchy. Financial resources are highly concentrated in the capital region, Seoul and Kyonggi Province. Both centralization trends into the large metropolitan cities and relative declines of medium and small cities within the Korean urban system, have been experienced over the study period. Financial activities sustain relatively stable hierarchical structure in the urban hierarchy. Regarding the financial flows, dominant flow zones centered on major metropolitan cities are identified, clearly showing a prominant role of Seoul in financial flows in the entire urban system.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.1050-1055
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• 2006

최근 3D 모바일 게임이 이슈가 되고 있다. 휴대폰이 필수품인 시대가 왔고 휴대폰만 있으면 어디서든 게임을 즐길 수 있다는 점 때문에 모바일 게임 산업은 급속도로 발전하고 있다. 그리고 점차 모바일 환경이 하드웨어가 발전하고 3D 가 지원되는 게임 전용폰이 나오면서 모바일 3D 게임이 많이 개발되고 있다. 그러나 휴대폰의 기본 기능은 통화하는 것이니 만큼 PC 에서의 게임이나 플레이스테이션 같은 게임기와는 구조에 차이가 있다. 모바일 환경에서는 휴대폰 버튼만을 사용하여야 한다는 제약이 있다. 그래서 현재 출시된 여거 모바일 게임의 UI 와 기존 PC 게임의 UI 를 비교하고 휴대폰이라는 제한된 환경에서의 도시경영 3D 시뮬레이션 게임을 위한 효율적인 UI 를 만들고자 하였다. 휴대폰에서는 마우스를 사용할 수 없기 때문에 기본적인 게임 조작은 전부 버튼으로 조작할 수 있게 하였다. 그리고 도시경영시뮬레이션 게임이기 때문에 일반 아케이드 게임이나 캐주얼게임에 비해 상대적으로 메뉴가 많고 복잡하다. 그래서 사용자가 설명을 바로 보면서 메뉴를 선택할 수 있도록 메뉴선택은 전부 숫자버튼을 사용하였다. 그리고 사용자가 메뉴를 외우고 있지 않아도 사용가능 하도록 화면 위에 메뉴설명이 같이 나오게 하였다. 사용자는 메뉴별 설명을 보면서 원하는 쪽으로 선택을 하게 된다. 지역설정에서는 마우스의 드래그기능이 안되기 때문에 처음시작점과 끝부분을 선택하여 마우스를 대신하였다.

• The Journal of the Korea Contents Association
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• v.16 no.6
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• pp.441-449
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• 2016

The integrated data is an essential in the analysis for the balanced development of the local governments, but economic, social and cultural data in local governments is not being made with integrated management. A variety of information is being published according to the Government 3.0 era, but the researchers has great difficulty in integrating the analysis for one topic because related information is scattered in various sites. This paper proposes an integrated database(DB) of local governments to support the research activities. It has to contains total information of economic, social and cultural activities of local governments, and accommodate the distributed and heterogeneous data. It has the schema designed to integrate the entire data for considering the differences between local governments or data components. We should focus to build a framework for the multifaceted research to enable the cross analysis over common elements.

• Journal of radiological science and technology
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• v.32 no.1
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• pp.39-43
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• 2009

The medical diagnostic examination using ionizing radiation has improved the patients' life and brought revolution in medical examination along with the mechanical development. However, the development of medical imaging systems has also been the reason to increase the patients' exposure for ionizing radiation. ICRP recommends that each country adopts diagnostic reference levels depending on regional and national situations. The Korea Food & Drug Administration suggested the dosimetry measurement guideline for patients in 2007. Nonetheless, in reality, it is hard to know the skin dose of the patients when applying a x-ray since there is no radiation dosimeter in most of clinical situation. Therefore, this study sets a program based on the bit system to figure out easily the skin dose of a patients using MS Excel program in the PC setting. The results showed 10% better outcome.

• Journal of the Economic Geographical Society of Korea
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• v.2 no.1_2
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• pp.103-122
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• 1999

The purpose of this paper is to analyse the industrial structure and competitiveness of five large cities in Korea. say Pusan, Taegu, Inchon, Kwangju, and Taejon. These cities are performing more important roles in this borderless society. Industrial competitiveness may not fully represent the competitiveness of a city, rather is one of the major constituents of urban competitiveness. The selected indices representing industrial competitiveness of a city include regional industrial share, location quotient, growth potential. productivity. profitability. The analyses reveal that all the five large cities are required the tasks for industrial restructuring in facing with the rapid deindustrialization trend. Inchon shows relatively competitive position in a number of industries, while the others are revealed weak in most categories of industries.

• Journal of Korea Port Economic Association
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• v.27 no.4
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• pp.145-164
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• 2011

The Northeast Asia has been the fastest growing region in the world for the past few decades. And now the economic bloc maintains its status as a major powerhouse of the world economy. On the way of its economic growth, Russia and Central Asian countries have emerged as major trading partners. The Trans-Siberian Railway(TSR) has been playing a pivotal role in promoting economic cooperation between the two regions. This paper investigates economic environment of the Korean TSR service operators through the SWOT analysis, then proposes management strategies for them. For this purpose, the authors analyze characteristics and roles of the TSR service operators. In addition, a comparison of difference between service operators and shippers about their recognition of economic environment of the TSR transportation service is also carried out.

• Journal of Korea Society of Industrial Information Systems
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• v.8 no.4
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• pp.1-7
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• 2003

This study is concerned with the operational methods of Quality Management employed by the small and medium-sized companies in Gang won-do to improve their power of competition. This study is particular, studied the consortium-participating companies on their Plans of Quality Management as to how they carry them out in order to advance to the first-class business enterprises. The results of this study showed that the of shortage manpower and funds that the local small and mediumsized companies commonly face played a significant role as major obstacles in implementing their Quality Management programs. The study results also suggest that it is necessary to promote some periodic manpower train- ing programs in cooperation with local universities, to utilize professors and experts to build management strategies that can bring and secure the power of competition, and to construct a system of educational-industrial cooperation, as ways leading these companies to the 21s1 century's type of business enterprise.

• The Journal of the Korea Contents Association
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• v.21 no.8
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• pp.69-78
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• 2021

With technological development including digitization, movie demand and supply in digital online movie market are increasing. This study aims to explore demand concentration of the digital online movie market, which is characterized by product variety compared to cinemas. Major findings of the empirical analysis on the TV VOD data during the recent seven years(2013 ~ 2019) are as follows. First, the analysis on 1,137 titles reveals that movie demand of theatrical market is more concentrated than that of TV VOD. Second, absolute long tail index of TV VOD, measured by the download number of indie & artistic movies(niche product), is increasing as more such movies are released in the market. However, both relative long tail index, measured by the share of indie & artistic movie demand, and top-ranked movies' share do not show consistent increase or decrease trend. Third, regression analysis exhibits that the relationship between demand concentration and market size is insignificant for TV VOD market. This study might have usefulness in that it provides empirical evidence for the nature of the Korean digital online movie market.