• 전기학회논문지
• /
• 제63권9호
• /
• pp.1199-1205
• /
• 2014

A power system configuration has been increasingly advanced with a number of generating units. In particular, renewable energy resources are widely introduced due to the environmental issues. When applying the renewable energy sources with the ESS (Energy Storage System), the ESS is the role of a potential generating resource in the power system while mitigating the output volatility of renewable energy resources. Thus, for applications of the ESS, the surrounding environment of it should be considered, which means that capacity and energy of the ESS can be affected. Moreover, operation strategy of the ESS should be proposed according to the installation purpose as well as the surrounding environment. In the paper, operation strategy of the ESS is proposed considering load demand and the output of renewable energy resources on a hourly basis. Then, the cost of electrical energy is minimized based on the economic model that consists of capital cost, operation cost, fuel cost, and grid cost for a year. It is sure that peak-shaving effects can be achieved while satisfying the minimum cost of electrical energy.

• 대한한의학회지
• /
• 제29권4호
• /
• pp.13-29
• /
• 2008

Because of the changes of a variety of aspects of disease theory alternative to standard medicine, demand for traditional medicine has increased. This study was undertaken to grasp and compare traditional-medicine administrative structure, functions and role between Korea and China. According to our research, both nations promote policy related to traditional-medicine, yet there are various differences because of each nation's scale, political structure, medical system, etc. Especially, compare to the Korean government, the Chinese government not only has paid more attention to traditional medicine but also established and promoted a synthesis development strategy for a long time. Additionally, there is weakness in Korea's traditional medicine policy compared to the Chinese's Synthetic development-strategy, which is the Oriental-policy Department and Korea Food&Drug administration. Therefore, to make up for the weakness, they will have to organize their role better and make a long-term development-strategy plan for traditional medicine.

• 한국보건간호학회지
• /
• 제27권2호
• /
• pp.372-383
• /
• 2013

Purpose: The purpose of this study was to investigate the current state and trends of factors influencing the quality of life in low- income elders living at home. Methods: To carry out this study we established the patient, intervention, comparison, outcomes (PICO) strategy, reviewed 241 published documents from both national and international electronic databases, and finally selected 9 references based on inclusion and exclusion criteria alone. The quality of selected references was assessed using 15 questions. Two reviewers independently examined titles and abstracts and assessed whether each met the predefined inclusion and exclusion criteria. Results: The following factors were significantly associated with quality of life in low- income elders: (1) demographic factors such as number of children, income, and age; (2) health - related factors such as joint exercise capacity, activities of daily living/instrumental activities of daily living, health perception, health promotion behavior, and depression; and (3) socio environmental factors such as family support, community-based service program, leisure activity, and the number of neighborhoods involved. Conclusion: The results of our study provide a definite basis for the development of a policy strategy to improve the quality of life in elders with low income and we hence strongly recommend that any strategy to improve the quality of life in low-income elders be based on the results of our study.

• 수산해양교육연구
• /
• 제24권2호
• /
• pp.286-301
• /
• 2012

This study was to consider the development strategy of Jeju Marine leisure equipment industry for facilitating marine leisure tourism industry. For achieving this goal, the case studies related to domestic & foreign marine leisure equipment industry, interviews of marine leisure equipment company, the contents of specialist consultation meeting were used in this study. The strategies for promoting were suggested in progress that step 1 was the expansion of maintenance infrastructure as of a port of call, step 2 was the establishing of marie leisure tourism image, step 3 was the integration of marine leisure equipment industry. More specific suggestions were followed. As an aspect of infrastructure, the expansion of management of marine leisure equipment such as yacht, development of marina having similar image of Jeju were suggested. As an aspect of law/institution, the development of financial support system on the marine leisure equipment, promotion of establishment of professional education institutions were suggested. As an aspect of contents/programs, the hosting the exhibition of marine leisure used equipment of international trade, the development of environmental-friendly program associated with cruise were suggested, Finally, as an aspect of promotion/marketing, the promotions linked with drama & movie industry, the strategy of improvement of negative image to the yacht industry were suggested.

• 수산해양교육연구
• /
• 제26권4호
• /
• pp.838-845
• /
• 2014

The objective of this study was to propose the priorities among the possible development strategies that can activate the industry while the market potential of cruise tourism industry has been increasing. To achieve the research aim, the A'WOT (SWOT-AHP) method was adopted in this study focusing on Jeju cruise industry. As a result of analysis, the strength factor (0.421) was the most important thing among the proposed factors. And, opportunity (0.348), weakness (0.135), and threat (0.096) factors were calculated in turn. Based on the A'WOT analysis, the most urgent thing among the strategy alternatives was 'Installation of dedicated department for Jeju cruise industry'. Accordingly, this result can be utilized as the fundamental data in order to make an optimal decision following by the environmental changes in Jeju cruise industry.

• Smart Structures and Systems
• /
• 제3권4호
• /
• pp.455-474
• /
• 2007

A flexibility-based distributed computing strategy (DCS) for structural health monitoring (SHM) has recently been proposed which is suitable for implementation on a network of densely distributed smart sensors. This approach uses a hierarchical strategy in which adjacent smart sensors are grouped together to form sensor communities. A flexibility-based damage detection method is employed to evaluate the condition of the local elements within the communities by utilizing only locally measured information. The damage detection results in these communities are then communicated with the surrounding communities and sent back to a central station. Structural health monitoring can be done without relying on central data acquisition and processing. The main purpose of this paper is to experimentally verify this flexibility-based DCS approach using wired sensors; such verification is essential prior to implementation on a smart sensor platform. The damage locating vector method that forms foundation of the DCS approach is briefly reviewed, followed by an overview of the DCS approach. This flexibility-based approach is then experimentally verified employing a 5.6 m long three-dimensional truss structure. To simulate damage in the structure, the original truss members are replaced by ones with a reduced cross section. Both single and multiple damage scenarios are studied. Experimental results show that the DCS approach can successfully detect the damage at local elements using only locally measured information.

• Journal of Preventive Medicine and Public Health
• /
• 제24권1호
• /
• pp.16-28
• /
• 1991

Service diversification is recognized as an important strategy against turbulent environmental change. This study is designed to find out the trend of service diversification in Korean health care organizations and also to identify factors associated with the degree of service diversification. Data were collected from 69 hospitals out of 71 hospitals with over 300 beds. Important findings are summarized below. 1. Types of diversification are closely related to hospital size. Large hospitals have a tendency to provide sophisticated services requiring specialized skills and equipment, while small hospital have concentrated their efforts on health screening programs. 2. The more competitive and bigger hospitals are, the greater number of services that provide. Also, hospitals operating rational management information systems provide more services. Contrary to the expectation hospitals with a low performance during last 3 years showed more service diversification. 3. A trend of more diversification was observed in hospitals whose chief executive officer used a prospector strategy. 4. A multiple regression analysis revealed that bed size, competitive environment, degree of rational management, and the growth pattern were significantly associated with the service diversification.

• 한국대기환경학회지
• /
• 제9권4호
• /
• pp.271-277
• /
• 1993

Indoor radon has been known as one of the notorious carcinogens. However, a safe environmental criterion of radon has not yet been established in Korea, The main objectives of this study were to study concentration distributions of radon, to trace radon sources in subways, and to obtain a strategy for radon reduction in Seoul metropolitan area. Radon concentrations had been extensively determined by several steps. The first step was to survey radon levels in all of 83 subway stations from October to November in 1991. The second step was to select 40 out of 83 stations and then to study seasonal variations in 1991 and 1992. The third step was to monitor radon levels by hourly-basis plans. The fourth step was to seek a radon reduction strategy by altering ventilation at Ankuk station where had the highest radon concentration during the first measurement step. Each underground floor in the station was divided into 10 sites to measure hourly radon variations. The final step of the study was to measure radon concentrations in groundwater that is one of the possible main sources radon place. The result of the various measuring approaches showed short-and long-term radon variation and indicated radon reduction schemes.

• 한국시스템다이내믹스연구
• /
• 제7권1호
• /
• pp.147-172
• /
• 2006

With the purpose of long-range planning toward local/regional sustainable development, it is desired to avoid unconditional industrialization and expansion and to build an eco-oriented development strategy considering site-specific characteristics of the environment. This paper thus aims at the elaboration of a system dynamics model of a locality/region so as to understand inherent dynamics of sustainable development and to assess the effectiveness of such an eco-oriented strategy. The model thus consists of several positive and negative feedback loops that accelerate or restrict local/regional economic growth within a system boundary incorporating the environment, economy, and society. The model is moreover applied to the assessment of the effectiveness of the development plan recently established in Damyang in JeollaNamdo, Korea. It is regarded in this case to be effective for population immigration and economic prosperity to give priority to restore the bamboo ecosystem and nourish a series of eco-friendly industries based on the bamboo items developed recently. It is also to be positive to sustainable development since it enables to maintain high quality of the environment from the outset of their development steps.

• 환경정책연구
• /
• 제6권3호
• /
• pp.91-114
• /
• 2007

Song and Nagaki(2007)에 나타나 있는 것과 같은 동북아지역의 황사(먼지모래폭풍: DSS) 저감을 위한 비음부담 공조체제는 참여국의 협정불이행으로 실행가능성에 문제가 제기된다. 만일 비협조적 전략이 각국에게 보다 현실적이 라면, 내쉬균형이 실현가능한 비용분담 게임의 결과를 예측하게 하여줄 수 있다. 본 연구에 따르면, 연속전략게임의 경우, ADB의 황사저감사업의 비용이 각국 투자에 의해 조달된다는 가정하에 무한한 내쉬균형이 발견된다. 또한, 비연속전략은 3각형 평면으로 나타나는 연속전략의 내쉬균형의 꼭짓점으로 나타나게 되며, 공조적 게임의 결과는 무한한 균형 점들을 1개의 점으로 수렴하게 된다.